From cd1678f963298a9e777f3edb72d28bc18a3a32c2 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Tue, 29 May 2012 12:41:19 +0200 Subject: iio: frequency: New driver for AD9523 SPI Low Jitter Clock Generator Changes since V1: Apply Jonathan's review feedback: Revise device status attribute names, and split documentation into two sections. Add additional comments, and fix indention issues. Remove pointless zero initializations. Revise return value handling. Simplify some code sections. Split store_eeprom and sync handling into separate functions. Use strtobool where applicable. Document platform data structures using kernel-doc style. Use dev_to_iio_dev write_raw IIO_CHAN_INFO_FREQUENCY: Reject values <= 0 Make patch target drivers/iio Changes since V2: Use for_each_clear_bit() and __set_bit() where applicable. Add descriptive comment. Avoid temporary for struct regulator. spi_device_id name use ad9523-1, ad9523 will be added later. Signed-off-by: Michael Hennerich Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/frequency/ad9523.h | 195 +++++++++++++++++++++++++++++++++++ 1 file changed, 195 insertions(+) create mode 100644 include/linux/iio/frequency/ad9523.h (limited to 'include/linux') diff --git a/include/linux/iio/frequency/ad9523.h b/include/linux/iio/frequency/ad9523.h new file mode 100644 index 000000000000..12ce3ee427fd --- /dev/null +++ b/include/linux/iio/frequency/ad9523.h @@ -0,0 +1,195 @@ +/* + * AD9523 SPI Low Jitter Clock Generator + * + * Copyright 2012 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#ifndef IIO_FREQUENCY_AD9523_H_ +#define IIO_FREQUENCY_AD9523_H_ + +enum outp_drv_mode { + TRISTATE, + LVPECL_8mA, + LVDS_4mA, + LVDS_7mA, + HSTL0_16mA, + HSTL1_8mA, + CMOS_CONF1, + CMOS_CONF2, + CMOS_CONF3, + CMOS_CONF4, + CMOS_CONF5, + CMOS_CONF6, + CMOS_CONF7, + CMOS_CONF8, + CMOS_CONF9 +}; + +enum ref_sel_mode { + NONEREVERTIVE_STAY_ON_REFB, + REVERT_TO_REFA, + SELECT_REFA, + SELECT_REFB, + EXT_REF_SEL +}; + +/** + * struct ad9523_channel_spec - Output channel configuration + * + * @channel_num: Output channel number. + * @divider_output_invert_en: Invert the polarity of the output clock. + * @sync_ignore_en: Ignore chip-level SYNC signal. + * @low_power_mode_en: Reduce power used in the differential output modes. + * @use_alt_clock_src: Channel divider uses alternative clk source. + * @output_dis: Disables, powers down the entire channel. + * @driver_mode: Output driver mode (logic level family). + * @divider_phase: Divider initial phase after a SYNC. Range 0..63 + LSB = 1/2 of a period of the divider input clock. + * @channel_divider: 10-bit channel divider. + * @extended_name: Optional descriptive channel name. + */ + +struct ad9523_channel_spec { + unsigned channel_num; + bool divider_output_invert_en; + bool sync_ignore_en; + bool low_power_mode_en; + /* CH0..CH3 VCXO, CH4..CH9 VCO2 */ + bool use_alt_clock_src; + bool output_dis; + enum outp_drv_mode driver_mode; + unsigned char divider_phase; + unsigned short channel_divider; + char extended_name[16]; +}; + +enum pll1_rzero_resistor { + RZERO_883_OHM, + RZERO_677_OHM, + RZERO_341_OHM, + RZERO_135_OHM, + RZERO_10_OHM, + RZERO_USE_EXT_RES = 8, +}; + +enum rpole2_resistor { + RPOLE2_900_OHM, + RPOLE2_450_OHM, + RPOLE2_300_OHM, + RPOLE2_225_OHM, +}; + +enum rzero_resistor { + RZERO_3250_OHM, + RZERO_2750_OHM, + RZERO_2250_OHM, + RZERO_2100_OHM, + RZERO_3000_OHM, + RZERO_2500_OHM, + RZERO_2000_OHM, + RZERO_1850_OHM, +}; + +enum cpole1_capacitor { + CPOLE1_0_PF, + CPOLE1_8_PF, + CPOLE1_16_PF, + CPOLE1_24_PF, + _CPOLE1_24_PF, /* place holder */ + CPOLE1_32_PF, + CPOLE1_40_PF, + CPOLE1_48_PF, +}; + +/** + * struct ad9523_platform_data - platform specific information + * + * @vcxo_freq: External VCXO frequency in Hz + * @refa_diff_rcv_en: REFA differential/single-ended input selection. + * @refb_diff_rcv_en: REFB differential/single-ended input selection. + * @zd_in_diff_en: Zero Delay differential/single-ended input selection. + * @osc_in_diff_en: OSC differential/ single-ended input selection. + * @refa_cmos_neg_inp_en: REFA single-ended neg./pos. input enable. + * @refb_cmos_neg_inp_en: REFB single-ended neg./pos. input enable. + * @zd_in_cmos_neg_inp_en: Zero Delay single-ended neg./pos. input enable. + * @osc_in_cmos_neg_inp_en: OSC single-ended neg./pos. input enable. + * @refa_r_div: PLL1 10-bit REFA R divider. + * @refb_r_div: PLL1 10-bit REFB R divider. + * @pll1_feedback_div: PLL1 10-bit Feedback N divider. + * @pll1_charge_pump_current_nA: Magnitude of PLL1 charge pump current (nA). + * @zero_delay_mode_internal_en: Internal, external Zero Delay mode selection. + * @osc_in_feedback_en: PLL1 feedback path, local feedback from + * the OSC_IN receiver or zero delay mode + * @pll1_loop_filter_rzero: PLL1 Loop Filter Zero Resistor selection. + * @ref_mode: Reference selection mode. + * @pll2_charge_pump_current_nA: Magnitude of PLL2 charge pump current (nA). + * @pll2_ndiv_a_cnt: PLL2 Feedback N-divider, A Counter, range 0..4. + * @pll2_ndiv_b_cnt: PLL2 Feedback N-divider, B Counter, range 0..63. + * @pll2_freq_doubler_en: PLL2 frequency doubler enable. + * @pll2_r2_div: PLL2 R2 divider, range 0..31. + * @pll2_vco_diff_m1: VCO1 divider, range 3..5. + * @pll2_vco_diff_m2: VCO2 divider, range 3..5. + * @rpole2: PLL2 loop filter Rpole resistor value. + * @rzero: PLL2 loop filter Rzero resistor value. + * @cpole1: PLL2 loop filter Cpole capacitor value. + * @rzero_bypass_en: PLL2 loop filter Rzero bypass enable. + * @num_channels: Array size of struct ad9523_channel_spec. + * @channels: Pointer to channel array. + * @name: Optional alternative iio device name. + */ + +struct ad9523_platform_data { + unsigned long vcxo_freq; + + /* Differential/ Single-Ended Input Configuration */ + bool refa_diff_rcv_en; + bool refb_diff_rcv_en; + bool zd_in_diff_en; + bool osc_in_diff_en; + + /* + * Valid if differential input disabled + * if false defaults to pos input + */ + bool refa_cmos_neg_inp_en; + bool refb_cmos_neg_inp_en; + bool zd_in_cmos_neg_inp_en; + bool osc_in_cmos_neg_inp_en; + + /* PLL1 Setting */ + unsigned short refa_r_div; + unsigned short refb_r_div; + unsigned short pll1_feedback_div; + unsigned short pll1_charge_pump_current_nA; + bool zero_delay_mode_internal_en; + bool osc_in_feedback_en; + enum pll1_rzero_resistor pll1_loop_filter_rzero; + + /* Reference */ + enum ref_sel_mode ref_mode; + + /* PLL2 Setting */ + unsigned int pll2_charge_pump_current_nA; + unsigned char pll2_ndiv_a_cnt; + unsigned char pll2_ndiv_b_cnt; + bool pll2_freq_doubler_en; + unsigned char pll2_r2_div; + unsigned char pll2_vco_diff_m1; /* 3..5 */ + unsigned char pll2_vco_diff_m2; /* 3..5 */ + + /* Loop Filter PLL2 */ + enum rpole2_resistor rpole2; + enum rzero_resistor rzero; + enum cpole1_capacitor cpole1; + bool rzero_bypass_en; + + /* Output Channel Configuration */ + int num_channels; + struct ad9523_channel_spec *channels; + + char name[SPI_NAME_SIZE]; +}; + +#endif /* IIO_FREQUENCY_AD9523_H_ */ -- cgit v1.2.3 From e31166f0fd48478866ee9661c36789126435ebe8 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Tue, 29 May 2012 12:41:20 +0200 Subject: iio: frequency: New driver for Analog Devices ADF4350/ADF4351 Wideband Synthesizers Changes since V1: Apply Jonathan's review feedback: Introduce and use IIO_ALTVOLTAGE. Fix up comments and documentation. Remove dead code. Reorder some code fragments. Add missing iio_device_free. Convert to new API. Fix-up out of staging includes. Removed pll_locked attribute. Changes since V2: Use module_spi_driver. adf4350_remove: move gpio_free after regulator. target patch to drivers/iio Signed-off-by: Michael Hennerich Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- .../ABI/testing/sysfs-bus-iio-frequency-adf4350 | 21 + drivers/iio/frequency/Kconfig | 18 + drivers/iio/frequency/Makefile | 1 + drivers/iio/frequency/adf4350.c | 478 +++++++++++++++++++++ include/linux/iio/frequency/adf4350.h | 126 ++++++ 5 files changed, 644 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4350 create mode 100644 drivers/iio/frequency/adf4350.c create mode 100644 include/linux/iio/frequency/adf4350.h (limited to 'include/linux') diff --git a/Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4350 b/Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4350 new file mode 100644 index 000000000000..d89aded01c5a --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4350 @@ -0,0 +1,21 @@ +What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency_resolution +KernelVersion: 3.4.0 +Contact: linux-iio@vger.kernel.org +Description: + Stores channel Y frequency resolution/channel spacing in Hz. + The value given directly influences the MODULUS used by + the fractional-N PLL. It is assumed that the algorithm + that is used to compute the various dividers, is able to + generate proper values for multiples of channel spacing. + +What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_refin_frequency +KernelVersion: 3.4.0 +Contact: linux-iio@vger.kernel.org +Description: + Sets channel Y REFin frequency in Hz. In some clock chained + applications, the reference frequency used by the PLL may + change during runtime. This attribute allows the user to + adjust the reference frequency accordingly. + The value written has no effect until out_altvoltageY_frequency + is updated. Consider to use out_altvoltageY_powerdown to power + down the PLL and it's RFOut buffers during REFin changes. diff --git a/drivers/iio/frequency/Kconfig b/drivers/iio/frequency/Kconfig index 0458c92464a3..6aaa33ef4544 100644 --- a/drivers/iio/frequency/Kconfig +++ b/drivers/iio/frequency/Kconfig @@ -19,5 +19,23 @@ config AD9523 To compile this driver as a module, choose M here: the module will be called ad9523. +endmenu + +# +# Phase-Locked Loop (PLL) frequency synthesizers +# + +menu "Phase-Locked Loop (PLL) frequency synthesizers" + +config ADF4350 + tristate "Analog Devices ADF4350/ADF4351 Wideband Synthesizers" + depends on SPI + help + Say yes here to build support for Analog Devices ADF4350/ADF4351 + Wideband Synthesizers. The driver provides direct access via sysfs. + + To compile this driver as a module, choose M here: the + module will be called adf4350. + endmenu endmenu diff --git a/drivers/iio/frequency/Makefile b/drivers/iio/frequency/Makefile index 1b5b22417da1..00d26e5d1dc2 100644 --- a/drivers/iio/frequency/Makefile +++ b/drivers/iio/frequency/Makefile @@ -3,3 +3,4 @@ # obj-$(CONFIG_AD9523) += ad9523.o +obj-$(CONFIG_ADF4350) += adf4350.o diff --git a/drivers/iio/frequency/adf4350.c b/drivers/iio/frequency/adf4350.c new file mode 100644 index 000000000000..fd4c8501aba9 --- /dev/null +++ b/drivers/iio/frequency/adf4350.c @@ -0,0 +1,478 @@ +/* + * ADF4350/ADF4351 SPI Wideband Synthesizer driver + * + * Copyright 2012 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +enum { + ADF4350_FREQ, + ADF4350_FREQ_REFIN, + ADF4350_FREQ_RESOLUTION, + ADF4350_PWRDOWN, +}; + +struct adf4350_state { + struct spi_device *spi; + struct regulator *reg; + struct adf4350_platform_data *pdata; + unsigned long clkin; + unsigned long chspc; /* Channel Spacing */ + unsigned long fpfd; /* Phase Frequency Detector */ + unsigned long min_out_freq; + unsigned r0_fract; + unsigned r0_int; + unsigned r1_mod; + unsigned r4_rf_div_sel; + unsigned long regs[6]; + unsigned long regs_hw[6]; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + __be32 val ____cacheline_aligned; +}; + +static struct adf4350_platform_data default_pdata = { + .clkin = 122880000, + .channel_spacing = 10000, + .r2_user_settings = ADF4350_REG2_PD_POLARITY_POS, + ADF4350_REG2_CHARGE_PUMP_CURR_uA(2500), + .r3_user_settings = ADF4350_REG3_12BIT_CLKDIV_MODE(0), + .r4_user_settings = ADF4350_REG4_OUTPUT_PWR(3) | + ADF4350_REG4_MUTE_TILL_LOCK_EN, + .gpio_lock_detect = -1, +}; + +static int adf4350_sync_config(struct adf4350_state *st) +{ + int ret, i, doublebuf = 0; + + for (i = ADF4350_REG5; i >= ADF4350_REG0; i--) { + if ((st->regs_hw[i] != st->regs[i]) || + ((i == ADF4350_REG0) && doublebuf)) { + + switch (i) { + case ADF4350_REG1: + case ADF4350_REG4: + doublebuf = 1; + break; + } + + st->val = cpu_to_be32(st->regs[i] | i); + ret = spi_write(st->spi, &st->val, 4); + if (ret < 0) + return ret; + st->regs_hw[i] = st->regs[i]; + dev_dbg(&st->spi->dev, "[%d] 0x%X\n", + i, (u32)st->regs[i] | i); + } + } + return 0; +} + +static int adf4350_reg_access(struct iio_dev *indio_dev, + unsigned reg, unsigned writeval, + unsigned *readval) +{ + struct adf4350_state *st = iio_priv(indio_dev); + int ret; + + if (reg > ADF4350_REG5) + return -EINVAL; + + mutex_lock(&indio_dev->mlock); + if (readval == NULL) { + st->regs[reg] = writeval & ~(BIT(0) | BIT(1) | BIT(2)); + ret = adf4350_sync_config(st); + } else { + *readval = st->regs_hw[reg]; + ret = 0; + } + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int adf4350_tune_r_cnt(struct adf4350_state *st, unsigned short r_cnt) +{ + struct adf4350_platform_data *pdata = st->pdata; + + do { + r_cnt++; + st->fpfd = (st->clkin * (pdata->ref_doubler_en ? 2 : 1)) / + (r_cnt * (pdata->ref_div2_en ? 2 : 1)); + } while (st->fpfd > ADF4350_MAX_FREQ_PFD); + + return r_cnt; +} + +static int adf4350_set_freq(struct adf4350_state *st, unsigned long long freq) +{ + struct adf4350_platform_data *pdata = st->pdata; + u64 tmp; + u32 div_gcd, prescaler; + u16 mdiv, r_cnt = 0; + u8 band_sel_div; + + if (freq > ADF4350_MAX_OUT_FREQ || freq < st->min_out_freq) + return -EINVAL; + + if (freq > ADF4350_MAX_FREQ_45_PRESC) { + prescaler = ADF4350_REG1_PRESCALER; + mdiv = 75; + } else { + prescaler = 0; + mdiv = 23; + } + + st->r4_rf_div_sel = 0; + + while (freq < ADF4350_MIN_VCO_FREQ) { + freq <<= 1; + st->r4_rf_div_sel++; + } + + /* + * Allow a predefined reference division factor + * if not set, compute our own + */ + if (pdata->ref_div_factor) + r_cnt = pdata->ref_div_factor - 1; + + do { + r_cnt = adf4350_tune_r_cnt(st, r_cnt); + + st->r1_mod = st->fpfd / st->chspc; + while (st->r1_mod > ADF4350_MAX_MODULUS) { + r_cnt = adf4350_tune_r_cnt(st, r_cnt); + st->r1_mod = st->fpfd / st->chspc; + } + + tmp = freq * (u64)st->r1_mod + (st->fpfd > 1); + do_div(tmp, st->fpfd); /* Div round closest (n + d/2)/d */ + st->r0_fract = do_div(tmp, st->r1_mod); + st->r0_int = tmp; + } while (mdiv > st->r0_int); + + band_sel_div = DIV_ROUND_UP(st->fpfd, ADF4350_MAX_BANDSEL_CLK); + + if (st->r0_fract && st->r1_mod) { + div_gcd = gcd(st->r1_mod, st->r0_fract); + st->r1_mod /= div_gcd; + st->r0_fract /= div_gcd; + } else { + st->r0_fract = 0; + st->r1_mod = 1; + } + + dev_dbg(&st->spi->dev, "VCO: %llu Hz, PFD %lu Hz\n" + "REF_DIV %d, R0_INT %d, R0_FRACT %d\n" + "R1_MOD %d, RF_DIV %d\nPRESCALER %s, BAND_SEL_DIV %d\n", + freq, st->fpfd, r_cnt, st->r0_int, st->r0_fract, st->r1_mod, + 1 << st->r4_rf_div_sel, prescaler ? "8/9" : "4/5", + band_sel_div); + + st->regs[ADF4350_REG0] = ADF4350_REG0_INT(st->r0_int) | + ADF4350_REG0_FRACT(st->r0_fract); + + st->regs[ADF4350_REG1] = ADF4350_REG1_PHASE(0) | + ADF4350_REG1_MOD(st->r1_mod) | + prescaler; + + st->regs[ADF4350_REG2] = + ADF4350_REG2_10BIT_R_CNT(r_cnt) | + ADF4350_REG2_DOUBLE_BUFF_EN | + (pdata->ref_doubler_en ? ADF4350_REG2_RMULT2_EN : 0) | + (pdata->ref_div2_en ? ADF4350_REG2_RDIV2_EN : 0) | + (pdata->r2_user_settings & (ADF4350_REG2_PD_POLARITY_POS | + ADF4350_REG2_LDP_6ns | ADF4350_REG2_LDF_INT_N | + ADF4350_REG2_CHARGE_PUMP_CURR_uA(5000) | + ADF4350_REG2_MUXOUT(0x7) | ADF4350_REG2_NOISE_MODE(0x9))); + + st->regs[ADF4350_REG3] = pdata->r3_user_settings & + (ADF4350_REG3_12BIT_CLKDIV(0xFFF) | + ADF4350_REG3_12BIT_CLKDIV_MODE(0x3) | + ADF4350_REG3_12BIT_CSR_EN | + ADF4351_REG3_CHARGE_CANCELLATION_EN | + ADF4351_REG3_ANTI_BACKLASH_3ns_EN | + ADF4351_REG3_BAND_SEL_CLOCK_MODE_HIGH); + + st->regs[ADF4350_REG4] = + ADF4350_REG4_FEEDBACK_FUND | + ADF4350_REG4_RF_DIV_SEL(st->r4_rf_div_sel) | + ADF4350_REG4_8BIT_BAND_SEL_CLKDIV(band_sel_div) | + ADF4350_REG4_RF_OUT_EN | + (pdata->r4_user_settings & + (ADF4350_REG4_OUTPUT_PWR(0x3) | + ADF4350_REG4_AUX_OUTPUT_PWR(0x3) | + ADF4350_REG4_AUX_OUTPUT_EN | + ADF4350_REG4_AUX_OUTPUT_FUND | + ADF4350_REG4_MUTE_TILL_LOCK_EN)); + + st->regs[ADF4350_REG5] = ADF4350_REG5_LD_PIN_MODE_DIGITAL; + + return adf4350_sync_config(st); +} + +static ssize_t adf4350_write(struct iio_dev *indio_dev, + uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, size_t len) +{ + struct adf4350_state *st = iio_priv(indio_dev); + unsigned long long readin; + int ret; + + ret = kstrtoull(buf, 10, &readin); + if (ret) + return ret; + + mutex_lock(&indio_dev->mlock); + switch ((u32)private) { + case ADF4350_FREQ: + ret = adf4350_set_freq(st, readin); + break; + case ADF4350_FREQ_REFIN: + if (readin > ADF4350_MAX_FREQ_REFIN) + ret = -EINVAL; + else + st->clkin = readin; + break; + case ADF4350_FREQ_RESOLUTION: + if (readin == 0) + ret = -EINVAL; + else + st->chspc = readin; + break; + case ADF4350_PWRDOWN: + if (readin) + st->regs[ADF4350_REG2] |= ADF4350_REG2_POWER_DOWN_EN; + else + st->regs[ADF4350_REG2] &= ~ADF4350_REG2_POWER_DOWN_EN; + + adf4350_sync_config(st); + break; + default: + ret = -ENODEV; + } + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : len; +} + +static ssize_t adf4350_read(struct iio_dev *indio_dev, + uintptr_t private, + const struct iio_chan_spec *chan, + char *buf) +{ + struct adf4350_state *st = iio_priv(indio_dev); + unsigned long long val; + int ret = 0; + + mutex_lock(&indio_dev->mlock); + switch ((u32)private) { + case ADF4350_FREQ: + val = (u64)((st->r0_int * st->r1_mod) + st->r0_fract) * + (u64)st->fpfd; + do_div(val, st->r1_mod * (1 << st->r4_rf_div_sel)); + /* PLL unlocked? return error */ + if (gpio_is_valid(st->pdata->gpio_lock_detect)) + if (!gpio_get_value(st->pdata->gpio_lock_detect)) { + dev_dbg(&st->spi->dev, "PLL un-locked\n"); + ret = -EBUSY; + } + break; + case ADF4350_FREQ_REFIN: + val = st->clkin; + break; + case ADF4350_FREQ_RESOLUTION: + val = st->chspc; + break; + case ADF4350_PWRDOWN: + val = !!(st->regs[ADF4350_REG2] & ADF4350_REG2_POWER_DOWN_EN); + break; + } + mutex_unlock(&indio_dev->mlock); + + return ret < 0 ? ret : sprintf(buf, "%llu\n", val); +} + +#define _ADF4350_EXT_INFO(_name, _ident) { \ + .name = _name, \ + .read = adf4350_read, \ + .write = adf4350_write, \ + .private = _ident, \ +} + +static const struct iio_chan_spec_ext_info adf4350_ext_info[] = { + /* Ideally we use IIO_CHAN_INFO_FREQUENCY, but there are + * values > 2^32 in order to support the entire frequency range + * in Hz. Using scale is a bit ugly. + */ + _ADF4350_EXT_INFO("frequency", ADF4350_FREQ), + _ADF4350_EXT_INFO("frequency_resolution", ADF4350_FREQ_RESOLUTION), + _ADF4350_EXT_INFO("refin_frequency", ADF4350_FREQ_REFIN), + _ADF4350_EXT_INFO("powerdown", ADF4350_PWRDOWN), + { }, +}; + +static const struct iio_chan_spec adf4350_chan = { + .type = IIO_ALTVOLTAGE, + .indexed = 1, + .output = 1, + .ext_info = adf4350_ext_info, +}; + +static const struct iio_info adf4350_info = { + .debugfs_reg_access = &adf4350_reg_access, + .driver_module = THIS_MODULE, +}; + +static int __devinit adf4350_probe(struct spi_device *spi) +{ + struct adf4350_platform_data *pdata = spi->dev.platform_data; + struct iio_dev *indio_dev; + struct adf4350_state *st; + int ret; + + if (!pdata) { + dev_warn(&spi->dev, "no platform data? using default\n"); + + pdata = &default_pdata; + } + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + + st->reg = regulator_get(&spi->dev, "vcc"); + if (!IS_ERR(st->reg)) { + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + } + + spi_set_drvdata(spi, indio_dev); + st->spi = spi; + st->pdata = pdata; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = (pdata->name[0] != 0) ? pdata->name : + spi_get_device_id(spi)->name; + + indio_dev->info = &adf4350_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = &adf4350_chan; + indio_dev->num_channels = 1; + + st->chspc = pdata->channel_spacing; + st->clkin = pdata->clkin; + + st->min_out_freq = spi_get_device_id(spi)->driver_data == 4351 ? + ADF4351_MIN_OUT_FREQ : ADF4350_MIN_OUT_FREQ; + + memset(st->regs_hw, 0xFF, sizeof(st->regs_hw)); + + if (gpio_is_valid(pdata->gpio_lock_detect)) { + ret = gpio_request(pdata->gpio_lock_detect, indio_dev->name); + if (ret) { + dev_err(&spi->dev, "fail to request lock detect GPIO-%d", + pdata->gpio_lock_detect); + goto error_disable_reg; + } + gpio_direction_input(pdata->gpio_lock_detect); + } + + if (pdata->power_up_frequency) { + ret = adf4350_set_freq(st, pdata->power_up_frequency); + if (ret) + goto error_free_gpio; + } + + ret = iio_device_register(indio_dev); + if (ret) + goto error_free_gpio; + + return 0; + +error_free_gpio: + if (gpio_is_valid(pdata->gpio_lock_detect)) + gpio_free(pdata->gpio_lock_detect); + +error_disable_reg: + if (!IS_ERR(st->reg)) + regulator_disable(st->reg); +error_put_reg: + if (!IS_ERR(st->reg)) + regulator_put(st->reg); + + iio_device_free(indio_dev); + + return ret; +} + +static int __devexit adf4350_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct adf4350_state *st = iio_priv(indio_dev); + struct regulator *reg = st->reg; + + st->regs[ADF4350_REG2] |= ADF4350_REG2_POWER_DOWN_EN; + adf4350_sync_config(st); + + iio_device_unregister(indio_dev); + + if (!IS_ERR(reg)) { + regulator_disable(reg); + regulator_put(reg); + } + + if (gpio_is_valid(st->pdata->gpio_lock_detect)) + gpio_free(st->pdata->gpio_lock_detect); + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id adf4350_id[] = { + {"adf4350", 4350}, + {"adf4351", 4351}, + {} +}; + +static struct spi_driver adf4350_driver = { + .driver = { + .name = "adf4350", + .owner = THIS_MODULE, + }, + .probe = adf4350_probe, + .remove = __devexit_p(adf4350_remove), + .id_table = adf4350_id, +}; +module_spi_driver(adf4350_driver); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Analog Devices ADF4350/ADF4351 PLL"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/iio/frequency/adf4350.h b/include/linux/iio/frequency/adf4350.h new file mode 100644 index 000000000000..b76b4a87065e --- /dev/null +++ b/include/linux/iio/frequency/adf4350.h @@ -0,0 +1,126 @@ +/* + * ADF4350/ADF4351 SPI PLL driver + * + * Copyright 2012 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#ifndef IIO_PLL_ADF4350_H_ +#define IIO_PLL_ADF4350_H_ + +/* Registers */ +#define ADF4350_REG0 0 +#define ADF4350_REG1 1 +#define ADF4350_REG2 2 +#define ADF4350_REG3 3 +#define ADF4350_REG4 4 +#define ADF4350_REG5 5 + +/* REG0 Bit Definitions */ +#define ADF4350_REG0_FRACT(x) (((x) & 0xFFF) << 3) +#define ADF4350_REG0_INT(x) (((x) & 0xFFFF) << 15) + +/* REG1 Bit Definitions */ +#define ADF4350_REG1_MOD(x) (((x) & 0xFFF) << 3) +#define ADF4350_REG1_PHASE(x) (((x) & 0xFFF) << 15) +#define ADF4350_REG1_PRESCALER (1 << 27) + +/* REG2 Bit Definitions */ +#define ADF4350_REG2_COUNTER_RESET_EN (1 << 3) +#define ADF4350_REG2_CP_THREESTATE_EN (1 << 4) +#define ADF4350_REG2_POWER_DOWN_EN (1 << 5) +#define ADF4350_REG2_PD_POLARITY_POS (1 << 6) +#define ADF4350_REG2_LDP_6ns (1 << 7) +#define ADF4350_REG2_LDP_10ns (0 << 7) +#define ADF4350_REG2_LDF_FRACT_N (0 << 8) +#define ADF4350_REG2_LDF_INT_N (1 << 8) +#define ADF4350_REG2_CHARGE_PUMP_CURR_uA(x) (((((x)-312) / 312) & 0xF) << 9) +#define ADF4350_REG2_DOUBLE_BUFF_EN (1 << 13) +#define ADF4350_REG2_10BIT_R_CNT(x) ((x) << 14) +#define ADF4350_REG2_RDIV2_EN (1 << 24) +#define ADF4350_REG2_RMULT2_EN (1 << 25) +#define ADF4350_REG2_MUXOUT(x) ((x) << 26) +#define ADF4350_REG2_NOISE_MODE(x) ((x) << 29) +#define ADF4350_MUXOUT_THREESTATE 0 +#define ADF4350_MUXOUT_DVDD 1 +#define ADF4350_MUXOUT_GND 2 +#define ADF4350_MUXOUT_R_DIV_OUT 3 +#define ADF4350_MUXOUT_N_DIV_OUT 4 +#define ADF4350_MUXOUT_ANALOG_LOCK_DETECT 5 +#define ADF4350_MUXOUT_DIGITAL_LOCK_DETECT 6 + +/* REG3 Bit Definitions */ +#define ADF4350_REG3_12BIT_CLKDIV(x) ((x) << 3) +#define ADF4350_REG3_12BIT_CLKDIV_MODE(x) ((x) << 16) +#define ADF4350_REG3_12BIT_CSR_EN (1 << 18) +#define ADF4351_REG3_CHARGE_CANCELLATION_EN (1 << 21) +#define ADF4351_REG3_ANTI_BACKLASH_3ns_EN (1 << 22) +#define ADF4351_REG3_BAND_SEL_CLOCK_MODE_HIGH (1 << 23) + +/* REG4 Bit Definitions */ +#define ADF4350_REG4_OUTPUT_PWR(x) ((x) << 3) +#define ADF4350_REG4_RF_OUT_EN (1 << 5) +#define ADF4350_REG4_AUX_OUTPUT_PWR(x) ((x) << 6) +#define ADF4350_REG4_AUX_OUTPUT_EN (1 << 8) +#define ADF4350_REG4_AUX_OUTPUT_FUND (1 << 9) +#define ADF4350_REG4_AUX_OUTPUT_DIV (0 << 9) +#define ADF4350_REG4_MUTE_TILL_LOCK_EN (1 << 10) +#define ADF4350_REG4_VCO_PWRDOWN_EN (1 << 11) +#define ADF4350_REG4_8BIT_BAND_SEL_CLKDIV(x) ((x) << 12) +#define ADF4350_REG4_RF_DIV_SEL(x) ((x) << 20) +#define ADF4350_REG4_FEEDBACK_DIVIDED (0 << 23) +#define ADF4350_REG4_FEEDBACK_FUND (1 << 23) + +/* REG5 Bit Definitions */ +#define ADF4350_REG5_LD_PIN_MODE_LOW (0 << 22) +#define ADF4350_REG5_LD_PIN_MODE_DIGITAL (1 << 22) +#define ADF4350_REG5_LD_PIN_MODE_HIGH (3 << 22) + +/* Specifications */ +#define ADF4350_MAX_OUT_FREQ 4400000000ULL /* Hz */ +#define ADF4350_MIN_OUT_FREQ 137500000 /* Hz */ +#define ADF4351_MIN_OUT_FREQ 34375000 /* Hz */ +#define ADF4350_MIN_VCO_FREQ 2200000000ULL /* Hz */ +#define ADF4350_MAX_FREQ_45_PRESC 3000000000ULL /* Hz */ +#define ADF4350_MAX_FREQ_PFD 32000000 /* Hz */ +#define ADF4350_MAX_BANDSEL_CLK 125000 /* Hz */ +#define ADF4350_MAX_FREQ_REFIN 250000000 /* Hz */ +#define ADF4350_MAX_MODULUS 4095 + +/** + * struct adf4350_platform_data - platform specific information + * @name: Optional device name. + * @clkin: REFin frequency in Hz. + * @channel_spacing: Channel spacing in Hz (influences MODULUS). + * @power_up_frequency: Optional, If set in Hz the PLL tunes to the desired + * frequency on probe. + * @ref_div_factor: Optional, if set the driver skips dynamic calculation + * and uses this default value instead. + * @ref_doubler_en: Enables reference doubler. + * @ref_div2_en: Enables reference divider. + * @r2_user_settings: User defined settings for ADF4350/1 REGISTER_2. + * @r3_user_settings: User defined settings for ADF4350/1 REGISTER_3. + * @r4_user_settings: User defined settings for ADF4350/1 REGISTER_4. + * @gpio_lock_detect: Optional, if set with a valid GPIO number, + * pll lock state is tested upon read. + * If not used - set to -1. + */ + +struct adf4350_platform_data { + char name[32]; + unsigned long clkin; + unsigned long channel_spacing; + unsigned long long power_up_frequency; + + unsigned short ref_div_factor; /* 10-bit R counter */ + bool ref_doubler_en; + bool ref_div2_en; + + unsigned r2_user_settings; + unsigned r3_user_settings; + unsigned r4_user_settings; + int gpio_lock_detect; +}; + +#endif /* IIO_PLL_ADF4350_H_ */ -- cgit v1.2.3 From e4e8b7765867e8f4705bcc18b8930edbe0e4ef3c Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 4 Jun 2012 10:50:02 +0200 Subject: iio: Add iio_device_get() This patch add the iio_device_get() function, which increases the reference count of a iio device. The matching function to decrease the reference count - iio_device_put() - already exists. Signed-off-by: Lars-Peter Clausen Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/iio.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux') diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 3a4f6a3ab80d..3238fa3374f7 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -438,6 +438,17 @@ static inline struct iio_dev *dev_to_iio_dev(struct device *dev) return container_of(dev, struct iio_dev, dev); } +/** + * iio_device_get() - increment reference count for the device + * @indio_dev: IIO device structure + * + * Returns: The passed IIO device + **/ +static inline struct iio_dev *iio_device_get(struct iio_dev *indio_dev) +{ + return indio_dev ? dev_to_iio_dev(get_device(&indio_dev->dev)) : NULL; +} + /* Can we make this smaller? */ #define IIO_ALIGN L1_CACHE_BYTES /** -- cgit v1.2.3 From 5212cc8a9d833791a7aec566db136e78951f203d Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 4 Jun 2012 11:36:11 +0200 Subject: iio: Add helper functions for enum style channel attributes We often have the case were we do have a enum style channel attribute. These attributes have in common that they are a list of string values which usually map in a 1-to-1 fashion to integer values. This patch implements some common helper code for implementing enum style channel attributes using extended channel attributes. The helper functions take care of converting between the string and integer values, as well providing a function for "_available" attributes which list all available enum items. Signed-off-by: Lars-Peter Clausen Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/industrialio-core.c | 63 ++++++++++++++++++++++++++++++++++++++++ include/linux/iio/iio.h | 64 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 127 insertions(+) (limited to 'include/linux') diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 1ddd8861c71b..56a3c0bc996c 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -289,6 +289,69 @@ static ssize_t iio_write_channel_ext_info(struct device *dev, this_attr->c, buf, len); } +ssize_t iio_enum_available_read(struct iio_dev *indio_dev, + uintptr_t priv, const struct iio_chan_spec *chan, char *buf) +{ + const struct iio_enum *e = (const struct iio_enum *)priv; + unsigned int i; + size_t len = 0; + + if (!e->num_items) + return 0; + + for (i = 0; i < e->num_items; ++i) + len += snprintf(buf + len, PAGE_SIZE - len, "%s ", e->items[i]); + + /* replace last space with a newline */ + buf[len - 1] = '\n'; + + return len; +} +EXPORT_SYMBOL_GPL(iio_enum_available_read); + +ssize_t iio_enum_read(struct iio_dev *indio_dev, + uintptr_t priv, const struct iio_chan_spec *chan, char *buf) +{ + const struct iio_enum *e = (const struct iio_enum *)priv; + int i; + + if (!e->get) + return -EINVAL; + + i = e->get(indio_dev, chan); + if (i < 0) + return i; + else if (i >= e->num_items) + return -EINVAL; + + return sprintf(buf, "%s\n", e->items[i]); +} +EXPORT_SYMBOL_GPL(iio_enum_read); + +ssize_t iio_enum_write(struct iio_dev *indio_dev, + uintptr_t priv, const struct iio_chan_spec *chan, const char *buf, + size_t len) +{ + const struct iio_enum *e = (const struct iio_enum *)priv; + unsigned int i; + int ret; + + if (!e->set) + return -EINVAL; + + for (i = 0; i < e->num_items; i++) { + if (sysfs_streq(buf, e->items[i])) + break; + } + + if (i == e->num_items) + return -EINVAL; + + ret = e->set(indio_dev, chan, i); + return ret ? ret : len; +} +EXPORT_SYMBOL_GPL(iio_enum_write); + static ssize_t iio_read_channel_info(struct device *dev, struct device_attribute *attr, char *buf) diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 3238fa3374f7..944c63511731 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -129,6 +129,70 @@ struct iio_chan_spec_ext_info { uintptr_t private; }; +/** + * struct iio_enum - Enum channel info attribute + * items: A array of strings. + * num_items: Length of the item array. + * set: Set callback function, may be NULL. + * get: Get callback function, may be NULL. + * + * The iio_enum struct can be used to implement enum style channel attributes. + * Enum style attributes are those which have a set of strings which map to + * unsigned integer values. The IIO enum helper code takes care of mapping + * between value and string as well as generating a "_available" file which + * contains a list of all available items. The set callback will be called when + * the attribute is updated. The last parameter is the index to the newly + * activated item. The get callback will be used to query the currently active + * item and is supposed to return the index for it. + */ +struct iio_enum { + const char * const *items; + unsigned int num_items; + int (*set)(struct iio_dev *, const struct iio_chan_spec *, unsigned int); + int (*get)(struct iio_dev *, const struct iio_chan_spec *); +}; + +ssize_t iio_enum_available_read(struct iio_dev *indio_dev, + uintptr_t priv, const struct iio_chan_spec *chan, char *buf); +ssize_t iio_enum_read(struct iio_dev *indio_dev, + uintptr_t priv, const struct iio_chan_spec *chan, char *buf); +ssize_t iio_enum_write(struct iio_dev *indio_dev, + uintptr_t priv, const struct iio_chan_spec *chan, const char *buf, + size_t len); + +/** + * IIO_ENUM() - Initialize enum extended channel attribute + * @_name: Attribute name + * @_shared: Whether the attribute is shared between all channels + * @_e: Pointer to a iio_enum struct + * + * This should usually be used together with IIO_ENUM_AVAILABLE() + */ +#define IIO_ENUM(_name, _shared, _e) \ +{ \ + .name = (_name), \ + .shared = (_shared), \ + .read = iio_enum_read, \ + .write = iio_enum_write, \ + .private = (uintptr_t)(_e), \ +} + +/** + * IIO_ENUM_AVAILABLE() - Initialize enum available extended channel attribute + * @_name: Attribute name ("_available" will be appended to the name) + * @_e: Pointer to a iio_enum struct + * + * Creates a read only attribute which list all the available enum items in a + * space separated list. This should usually be used together with IIO_ENUM() + */ +#define IIO_ENUM_AVAILABLE(_name, _e) \ +{ \ + .name = (_name "_available"), \ + .shared = true, \ + .read = iio_enum_available_read, \ + .private = (uintptr_t)(_e), \ +} + /** * struct iio_chan_spec - specification of a single channel * @type: What type of measurement is the channel making. -- cgit v1.2.3 From dbdc025bb239ce62c9b4d28c459a98f22ce9ec0a Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 4 Jun 2012 11:36:28 +0200 Subject: staging:iio: Move DAC drivers out of staging The IIO DAC drivers are in a reasonably good shape. They all make use of channel spec and non of them provides non-documented sysfs attributes. Code style should be OK as well, both checkpatch and coccicheck only report trivial issues. So lets move the whole folder out of staging. Signed-off-by: Lars-Peter Clausen Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/Kconfig | 1 + drivers/iio/Makefile | 1 + drivers/iio/dac/Kconfig | 121 +++++++ drivers/iio/dac/Makefile | 15 + drivers/iio/dac/ad5064.c | 538 ++++++++++++++++++++++++++++ drivers/iio/dac/ad5360.c | 570 +++++++++++++++++++++++++++++ drivers/iio/dac/ad5380.c | 657 ++++++++++++++++++++++++++++++++++ drivers/iio/dac/ad5421.c | 544 ++++++++++++++++++++++++++++ drivers/iio/dac/ad5446.c | 381 ++++++++++++++++++++ drivers/iio/dac/ad5446.h | 89 +++++ drivers/iio/dac/ad5504.c | 393 ++++++++++++++++++++ drivers/iio/dac/ad5624r.h | 79 ++++ drivers/iio/dac/ad5624r_spi.c | 324 +++++++++++++++++ drivers/iio/dac/ad5686.c | 418 +++++++++++++++++++++ drivers/iio/dac/ad5764.c | 382 ++++++++++++++++++++ drivers/iio/dac/ad5791.c | 485 +++++++++++++++++++++++++ drivers/iio/dac/max517.c | 243 +++++++++++++ drivers/staging/iio/Kconfig | 1 - drivers/staging/iio/Makefile | 1 - drivers/staging/iio/dac/Kconfig | 121 ------- drivers/staging/iio/dac/Makefile | 15 - drivers/staging/iio/dac/ad5064.c | 538 ---------------------------- drivers/staging/iio/dac/ad5360.c | 570 ----------------------------- drivers/staging/iio/dac/ad5380.c | 657 ---------------------------------- drivers/staging/iio/dac/ad5421.c | 544 ---------------------------- drivers/staging/iio/dac/ad5421.h | 32 -- drivers/staging/iio/dac/ad5446.c | 381 -------------------- drivers/staging/iio/dac/ad5446.h | 89 ----- drivers/staging/iio/dac/ad5504.c | 394 -------------------- drivers/staging/iio/dac/ad5504.h | 20 -- drivers/staging/iio/dac/ad5624r.h | 79 ---- drivers/staging/iio/dac/ad5624r_spi.c | 324 ----------------- drivers/staging/iio/dac/ad5686.c | 418 --------------------- drivers/staging/iio/dac/ad5764.c | 382 -------------------- drivers/staging/iio/dac/ad5791.c | 486 ------------------------- drivers/staging/iio/dac/ad5791.h | 29 -- drivers/staging/iio/dac/max517.c | 244 ------------- drivers/staging/iio/dac/max517.h | 19 - include/linux/iio/dac/ad5421.h | 28 ++ include/linux/iio/dac/ad5504.h | 16 + include/linux/iio/dac/ad5791.h | 25 ++ include/linux/iio/dac/max517.h | 15 + 42 files changed, 5325 insertions(+), 5344 deletions(-) create mode 100644 drivers/iio/dac/Kconfig create mode 100644 drivers/iio/dac/Makefile create mode 100644 drivers/iio/dac/ad5064.c create mode 100644 drivers/iio/dac/ad5360.c create mode 100644 drivers/iio/dac/ad5380.c create mode 100644 drivers/iio/dac/ad5421.c create mode 100644 drivers/iio/dac/ad5446.c create mode 100644 drivers/iio/dac/ad5446.h create mode 100644 drivers/iio/dac/ad5504.c create mode 100644 drivers/iio/dac/ad5624r.h create mode 100644 drivers/iio/dac/ad5624r_spi.c create mode 100644 drivers/iio/dac/ad5686.c create mode 100644 drivers/iio/dac/ad5764.c create mode 100644 drivers/iio/dac/ad5791.c create mode 100644 drivers/iio/dac/max517.c delete mode 100644 drivers/staging/iio/dac/Kconfig delete mode 100644 drivers/staging/iio/dac/Makefile delete mode 100644 drivers/staging/iio/dac/ad5064.c delete mode 100644 drivers/staging/iio/dac/ad5360.c delete mode 100644 drivers/staging/iio/dac/ad5380.c delete mode 100644 drivers/staging/iio/dac/ad5421.c delete mode 100644 drivers/staging/iio/dac/ad5421.h delete mode 100644 drivers/staging/iio/dac/ad5446.c delete mode 100644 drivers/staging/iio/dac/ad5446.h delete mode 100644 drivers/staging/iio/dac/ad5504.c delete mode 100644 drivers/staging/iio/dac/ad5504.h delete mode 100644 drivers/staging/iio/dac/ad5624r.h delete mode 100644 drivers/staging/iio/dac/ad5624r_spi.c delete mode 100644 drivers/staging/iio/dac/ad5686.c delete mode 100644 drivers/staging/iio/dac/ad5764.c delete mode 100644 drivers/staging/iio/dac/ad5791.c delete mode 100644 drivers/staging/iio/dac/ad5791.h delete mode 100644 drivers/staging/iio/dac/max517.c delete mode 100644 drivers/staging/iio/dac/max517.h create mode 100644 include/linux/iio/dac/ad5421.h create mode 100644 include/linux/iio/dac/ad5504.h create mode 100644 include/linux/iio/dac/ad5791.h create mode 100644 include/linux/iio/dac/max517.h (limited to 'include/linux') diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index 64c88e5cda4d..103349f2b3b5 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -52,5 +52,6 @@ source "drivers/iio/adc/Kconfig" source "drivers/iio/amplifiers/Kconfig" source "drivers/iio/light/Kconfig" source "drivers/iio/frequency/Kconfig" +source "drivers/iio/dac/Kconfig" endif # IIO diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile index bd801c0bbc2f..c38fa2a40af2 100644 --- a/drivers/iio/Makefile +++ b/drivers/iio/Makefile @@ -13,3 +13,4 @@ obj-y += adc/ obj-y += amplifiers/ obj-y += light/ obj-y += frequency/ +obj-y += dac/ diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig new file mode 100644 index 000000000000..a626f03871ec --- /dev/null +++ b/drivers/iio/dac/Kconfig @@ -0,0 +1,121 @@ +# +# DAC drivers +# +menu "Digital to analog converters" + +config AD5064 + tristate "Analog Devices AD5064/64-1/65/44/45/24/25, AD5628/48/66/68 DAC driver" + depends on SPI + help + Say yes here to build support for Analog Devices AD5024, AD5025, AD5044, + AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5648, AD5666, AD5668 Digital + to Analog Converter. + + To compile this driver as a module, choose M here: the + module will be called ad5064. + +config AD5360 + tristate "Analog Devices Analog Devices AD5360/61/62/63/70/71/73 DAC driver" + depends on SPI + help + Say yes here to build support for Analog Devices AD5360, AD5361, + AD5362, AD5363, AD5370, AD5371, AD5373 multi-channel + Digital to Analog Converters (DAC). + + To compile this driver as module choose M here: the module will be called + ad5360. + +config AD5380 + tristate "Analog Devices AD5380/81/82/83/84/90/91/92 DAC driver" + depends on (SPI_MASTER || I2C) + select REGMAP_I2C if I2C + select REGMAP_SPI if SPI_MASTER + help + Say yes here to build support for Analog Devices AD5380, AD5381, + AD5382, AD5383, AD5384, AD5390, AD5391, AD5392 multi-channel + Digital to Analog Converters (DAC). + + To compile this driver as module choose M here: the module will be called + ad5380. + +config AD5421 + tristate "Analog Devices AD5421 DAC driver" + depends on SPI + help + Say yes here to build support for Analog Devices AD5421 loop-powered + digital-to-analog convertors (DAC). + + To compile this driver as module choose M here: the module will be called + ad5421. + +config AD5624R_SPI + tristate "Analog Devices AD5624/44/64R DAC spi driver" + depends on SPI + help + Say yes here to build support for Analog Devices AD5624R, AD5644R and + AD5664R converters (DAC). This driver uses the common SPI interface. + +config AD5446 + tristate "Analog Devices AD5446 and similar single channel DACs driver" + depends on SPI + help + Say yes here to build support for Analog Devices AD5444, AD5446, + AD5512A, AD5541A, AD5542A, AD5543, AD5553, AD5601, AD5611, AD5620, + AD5621, AD5640, AD5660, AD5662 DACs. + + To compile this driver as a module, choose M here: the + module will be called ad5446. + +config AD5504 + tristate "Analog Devices AD5504/AD5501 DAC SPI driver" + depends on SPI + help + Say yes here to build support for Analog Devices AD5504, AD5501, + High Voltage Digital to Analog Converter. + + To compile this driver as a module, choose M here: the + module will be called ad5504. + +config AD5764 + tristate "Analog Devices AD5764/64R/44/44R DAC driver" + depends on SPI_MASTER + help + Say yes here to build support for Analog Devices AD5764, AD5764R, AD5744, + AD5744R Digital to Analog Converter. + + To compile this driver as a module, choose M here: the + module will be called ad5764. + +config AD5791 + tristate "Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC SPI driver" + depends on SPI + help + Say yes here to build support for Analog Devices AD5760, AD5780, + AD5781, AD5790, AD5791 High Resolution Voltage Output Digital to + Analog Converter. + + To compile this driver as a module, choose M here: the + module will be called ad5791. + +config AD5686 + tristate "Analog Devices AD5686R/AD5685R/AD5684R DAC SPI driver" + depends on SPI + help + Say yes here to build support for Analog Devices AD5686R, AD5685R, + AD5684R, AD5791 Voltage Output Digital to + Analog Converter. + + To compile this driver as a module, choose M here: the + module will be called ad5686. + +config MAX517 + tristate "Maxim MAX517/518/519 DAC driver" + depends on I2C && EXPERIMENTAL + help + If you say yes here you get support for the Maxim chips MAX517, + MAX518 and MAX519 (I2C 8-Bit DACs with rail-to-rail outputs). + + This driver can also be built as a module. If so, the module + will be called max517. + +endmenu diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile new file mode 100644 index 000000000000..8ab1d264aab7 --- /dev/null +++ b/drivers/iio/dac/Makefile @@ -0,0 +1,15 @@ +# +# Makefile for industrial I/O DAC drivers +# + +obj-$(CONFIG_AD5360) += ad5360.o +obj-$(CONFIG_AD5380) += ad5380.o +obj-$(CONFIG_AD5421) += ad5421.o +obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o +obj-$(CONFIG_AD5064) += ad5064.o +obj-$(CONFIG_AD5504) += ad5504.o +obj-$(CONFIG_AD5446) += ad5446.o +obj-$(CONFIG_AD5764) += ad5764.o +obj-$(CONFIG_AD5791) += ad5791.o +obj-$(CONFIG_AD5686) += ad5686.o +obj-$(CONFIG_MAX517) += max517.o diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c new file mode 100644 index 000000000000..276af02520af --- /dev/null +++ b/drivers/iio/dac/ad5064.c @@ -0,0 +1,538 @@ +/* + * AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5648, + * AD5666, AD5668 Digital to analog converters driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define AD5064_MAX_DAC_CHANNELS 8 +#define AD5064_MAX_VREFS 4 + +#define AD5064_ADDR(x) ((x) << 20) +#define AD5064_CMD(x) ((x) << 24) + +#define AD5064_ADDR_DAC(chan) (chan) +#define AD5064_ADDR_ALL_DAC 0xF + +#define AD5064_CMD_WRITE_INPUT_N 0x0 +#define AD5064_CMD_UPDATE_DAC_N 0x1 +#define AD5064_CMD_WRITE_INPUT_N_UPDATE_ALL 0x2 +#define AD5064_CMD_WRITE_INPUT_N_UPDATE_N 0x3 +#define AD5064_CMD_POWERDOWN_DAC 0x4 +#define AD5064_CMD_CLEAR 0x5 +#define AD5064_CMD_LDAC_MASK 0x6 +#define AD5064_CMD_RESET 0x7 +#define AD5064_CMD_CONFIG 0x8 + +#define AD5064_CONFIG_DAISY_CHAIN_ENABLE BIT(1) +#define AD5064_CONFIG_INT_VREF_ENABLE BIT(0) + +#define AD5064_LDAC_PWRDN_NONE 0x0 +#define AD5064_LDAC_PWRDN_1K 0x1 +#define AD5064_LDAC_PWRDN_100K 0x2 +#define AD5064_LDAC_PWRDN_3STATE 0x3 + +/** + * struct ad5064_chip_info - chip specific information + * @shared_vref: whether the vref supply is shared between channels + * @internal_vref: internal reference voltage. 0 if the chip has no internal + * vref. + * @channel: channel specification + * @num_channels: number of channels + */ + +struct ad5064_chip_info { + bool shared_vref; + unsigned long internal_vref; + const struct iio_chan_spec *channels; + unsigned int num_channels; +}; + +/** + * struct ad5064_state - driver instance specific data + * @spi: spi_device + * @chip_info: chip model specific constants, available modes etc + * @vref_reg: vref supply regulators + * @pwr_down: whether channel is powered down + * @pwr_down_mode: channel's current power down mode + * @dac_cache: current DAC raw value (chip does not support readback) + * @use_internal_vref: set to true if the internal reference voltage should be + * used. + * @data: spi transfer buffers + */ + +struct ad5064_state { + struct spi_device *spi; + const struct ad5064_chip_info *chip_info; + struct regulator_bulk_data vref_reg[AD5064_MAX_VREFS]; + bool pwr_down[AD5064_MAX_DAC_CHANNELS]; + u8 pwr_down_mode[AD5064_MAX_DAC_CHANNELS]; + unsigned int dac_cache[AD5064_MAX_DAC_CHANNELS]; + bool use_internal_vref; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + __be32 data ____cacheline_aligned; +}; + +enum ad5064_type { + ID_AD5024, + ID_AD5025, + ID_AD5044, + ID_AD5045, + ID_AD5064, + ID_AD5064_1, + ID_AD5065, + ID_AD5628_1, + ID_AD5628_2, + ID_AD5648_1, + ID_AD5648_2, + ID_AD5666_1, + ID_AD5666_2, + ID_AD5668_1, + ID_AD5668_2, +}; + +static int ad5064_spi_write(struct ad5064_state *st, unsigned int cmd, + unsigned int addr, unsigned int val, unsigned int shift) +{ + val <<= shift; + + st->data = cpu_to_be32(AD5064_CMD(cmd) | AD5064_ADDR(addr) | val); + + return spi_write(st->spi, &st->data, sizeof(st->data)); +} + +static int ad5064_sync_powerdown_mode(struct ad5064_state *st, + unsigned int channel) +{ + unsigned int val; + int ret; + + val = (0x1 << channel); + + if (st->pwr_down[channel]) + val |= st->pwr_down_mode[channel] << 8; + + ret = ad5064_spi_write(st, AD5064_CMD_POWERDOWN_DAC, 0, val, 0); + + return ret; +} + +static const char * const ad5064_powerdown_modes[] = { + "1kohm_to_gnd", + "100kohm_to_gnd", + "three_state", +}; + +static int ad5064_get_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad5064_state *st = iio_priv(indio_dev); + + return st->pwr_down_mode[chan->channel] - 1; +} + +static int ad5064_set_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int mode) +{ + struct ad5064_state *st = iio_priv(indio_dev); + int ret; + + mutex_lock(&indio_dev->mlock); + st->pwr_down_mode[chan->channel] = mode + 1; + + ret = ad5064_sync_powerdown_mode(st, chan->channel); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static const struct iio_enum ad5064_powerdown_mode_enum = { + .items = ad5064_powerdown_modes, + .num_items = ARRAY_SIZE(ad5064_powerdown_modes), + .get = ad5064_get_powerdown_mode, + .set = ad5064_set_powerdown_mode, +}; + +static ssize_t ad5064_read_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, char *buf) +{ + struct ad5064_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", st->pwr_down[chan->channel]); +} + +static ssize_t ad5064_write_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, const char *buf, + size_t len) +{ + struct ad5064_state *st = iio_priv(indio_dev); + bool pwr_down; + int ret; + + ret = strtobool(buf, &pwr_down); + if (ret) + return ret; + + mutex_lock(&indio_dev->mlock); + st->pwr_down[chan->channel] = pwr_down; + + ret = ad5064_sync_powerdown_mode(st, chan->channel); + mutex_unlock(&indio_dev->mlock); + return ret ? ret : len; +} + +static int ad5064_get_vref(struct ad5064_state *st, + struct iio_chan_spec const *chan) +{ + unsigned int i; + + if (st->use_internal_vref) + return st->chip_info->internal_vref; + + i = st->chip_info->shared_vref ? 0 : chan->channel; + return regulator_get_voltage(st->vref_reg[i].consumer); +} + +static int ad5064_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct ad5064_state *st = iio_priv(indio_dev); + int scale_uv; + + switch (m) { + case IIO_CHAN_INFO_RAW: + *val = st->dac_cache[chan->channel]; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + scale_uv = ad5064_get_vref(st, chan); + if (scale_uv < 0) + return scale_uv; + + scale_uv = (scale_uv * 100) >> chan->scan_type.realbits; + *val = scale_uv / 100000; + *val2 = (scale_uv % 100000) * 10; + return IIO_VAL_INT_PLUS_MICRO; + default: + break; + } + return -EINVAL; +} + +static int ad5064_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + struct ad5064_state *st = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (val > (1 << chan->scan_type.realbits) || val < 0) + return -EINVAL; + + mutex_lock(&indio_dev->mlock); + ret = ad5064_spi_write(st, AD5064_CMD_WRITE_INPUT_N_UPDATE_N, + chan->address, val, chan->scan_type.shift); + if (ret == 0) + st->dac_cache[chan->channel] = val; + mutex_unlock(&indio_dev->mlock); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static const struct iio_info ad5064_info = { + .read_raw = ad5064_read_raw, + .write_raw = ad5064_write_raw, + .driver_module = THIS_MODULE, +}; + +static const struct iio_chan_spec_ext_info ad5064_ext_info[] = { + { + .name = "powerdown", + .read = ad5064_read_dac_powerdown, + .write = ad5064_write_dac_powerdown, + }, + IIO_ENUM("powerdown_mode", false, &ad5064_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", &ad5064_powerdown_mode_enum), + { }, +}; + +#define AD5064_CHANNEL(chan, bits) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (chan), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ + .address = AD5064_ADDR_DAC(chan), \ + .scan_type = IIO_ST('u', (bits), 16, 20 - (bits)), \ + .ext_info = ad5064_ext_info, \ +} + +#define DECLARE_AD5064_CHANNELS(name, bits) \ +const struct iio_chan_spec name[] = { \ + AD5064_CHANNEL(0, bits), \ + AD5064_CHANNEL(1, bits), \ + AD5064_CHANNEL(2, bits), \ + AD5064_CHANNEL(3, bits), \ + AD5064_CHANNEL(4, bits), \ + AD5064_CHANNEL(5, bits), \ + AD5064_CHANNEL(6, bits), \ + AD5064_CHANNEL(7, bits), \ +} + +static DECLARE_AD5064_CHANNELS(ad5024_channels, 12); +static DECLARE_AD5064_CHANNELS(ad5044_channels, 14); +static DECLARE_AD5064_CHANNELS(ad5064_channels, 16); + +static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { + [ID_AD5024] = { + .shared_vref = false, + .channels = ad5024_channels, + .num_channels = 4, + }, + [ID_AD5025] = { + .shared_vref = false, + .channels = ad5024_channels, + .num_channels = 2, + }, + [ID_AD5044] = { + .shared_vref = false, + .channels = ad5044_channels, + .num_channels = 4, + }, + [ID_AD5045] = { + .shared_vref = false, + .channels = ad5044_channels, + .num_channels = 2, + }, + [ID_AD5064] = { + .shared_vref = false, + .channels = ad5064_channels, + .num_channels = 4, + }, + [ID_AD5064_1] = { + .shared_vref = true, + .channels = ad5064_channels, + .num_channels = 4, + }, + [ID_AD5065] = { + .shared_vref = false, + .channels = ad5064_channels, + .num_channels = 2, + }, + [ID_AD5628_1] = { + .shared_vref = true, + .internal_vref = 2500000, + .channels = ad5024_channels, + .num_channels = 8, + }, + [ID_AD5628_2] = { + .shared_vref = true, + .internal_vref = 5000000, + .channels = ad5024_channels, + .num_channels = 8, + }, + [ID_AD5648_1] = { + .shared_vref = true, + .internal_vref = 2500000, + .channels = ad5044_channels, + .num_channels = 8, + }, + [ID_AD5648_2] = { + .shared_vref = true, + .internal_vref = 5000000, + .channels = ad5044_channels, + .num_channels = 8, + }, + [ID_AD5666_1] = { + .shared_vref = true, + .internal_vref = 2500000, + .channels = ad5064_channels, + .num_channels = 4, + }, + [ID_AD5666_2] = { + .shared_vref = true, + .internal_vref = 5000000, + .channels = ad5064_channels, + .num_channels = 4, + }, + [ID_AD5668_1] = { + .shared_vref = true, + .internal_vref = 2500000, + .channels = ad5064_channels, + .num_channels = 8, + }, + [ID_AD5668_2] = { + .shared_vref = true, + .internal_vref = 5000000, + .channels = ad5064_channels, + .num_channels = 8, + }, +}; + +static inline unsigned int ad5064_num_vref(struct ad5064_state *st) +{ + return st->chip_info->shared_vref ? 1 : st->chip_info->num_channels; +} + +static const char * const ad5064_vref_names[] = { + "vrefA", + "vrefB", + "vrefC", + "vrefD", +}; + +static const char * const ad5064_vref_name(struct ad5064_state *st, + unsigned int vref) +{ + return st->chip_info->shared_vref ? "vref" : ad5064_vref_names[vref]; +} + +static int __devinit ad5064_probe(struct spi_device *spi) +{ + enum ad5064_type type = spi_get_device_id(spi)->driver_data; + struct iio_dev *indio_dev; + struct ad5064_state *st; + unsigned int i; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->chip_info = &ad5064_chip_info_tbl[type]; + st->spi = spi; + + for (i = 0; i < ad5064_num_vref(st); ++i) + st->vref_reg[i].supply = ad5064_vref_name(st, i); + + ret = regulator_bulk_get(&st->spi->dev, ad5064_num_vref(st), + st->vref_reg); + if (ret) { + if (!st->chip_info->internal_vref) + goto error_free; + st->use_internal_vref = true; + ret = ad5064_spi_write(st, AD5064_CMD_CONFIG, 0, + AD5064_CONFIG_INT_VREF_ENABLE, 0); + if (ret) { + dev_err(&spi->dev, "Failed to enable internal vref: %d\n", + ret); + goto error_free; + } + } else { + ret = regulator_bulk_enable(ad5064_num_vref(st), st->vref_reg); + if (ret) + goto error_free_reg; + } + + for (i = 0; i < st->chip_info->num_channels; ++i) { + st->pwr_down_mode[i] = AD5064_LDAC_PWRDN_1K; + st->dac_cache[i] = 0x8000; + } + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->info = &ad5064_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = st->chip_info->num_channels; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_disable_reg; + + return 0; + +error_disable_reg: + if (!st->use_internal_vref) + regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg); +error_free_reg: + if (!st->use_internal_vref) + regulator_bulk_free(ad5064_num_vref(st), st->vref_reg); +error_free: + iio_device_free(indio_dev); + + return ret; +} + + +static int __devexit ad5064_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5064_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + if (!st->use_internal_vref) { + regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg); + regulator_bulk_free(ad5064_num_vref(st), st->vref_reg); + } + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5064_id[] = { + {"ad5024", ID_AD5024}, + {"ad5025", ID_AD5025}, + {"ad5044", ID_AD5044}, + {"ad5045", ID_AD5045}, + {"ad5064", ID_AD5064}, + {"ad5064-1", ID_AD5064_1}, + {"ad5065", ID_AD5065}, + {"ad5628-1", ID_AD5628_1}, + {"ad5628-2", ID_AD5628_2}, + {"ad5648-1", ID_AD5648_1}, + {"ad5648-2", ID_AD5648_2}, + {"ad5666-1", ID_AD5666_1}, + {"ad5666-2", ID_AD5666_2}, + {"ad5668-1", ID_AD5668_1}, + {"ad5668-2", ID_AD5668_2}, + {"ad5668-3", ID_AD5668_2}, /* similar enough to ad5668-2 */ + {} +}; +MODULE_DEVICE_TABLE(spi, ad5064_id); + +static struct spi_driver ad5064_driver = { + .driver = { + .name = "ad5064", + .owner = THIS_MODULE, + }, + .probe = ad5064_probe, + .remove = __devexit_p(ad5064_remove), + .id_table = ad5064_id, +}; +module_spi_driver(ad5064_driver); + +MODULE_AUTHOR("Lars-Peter Clausen "); +MODULE_DESCRIPTION("Analog Devices AD5024/25/44/45/64/64-1/65, AD5628/48/66/68 DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5360.c b/drivers/iio/dac/ad5360.c new file mode 100644 index 000000000000..8fce84fe70b1 --- /dev/null +++ b/drivers/iio/dac/ad5360.c @@ -0,0 +1,570 @@ +/* + * Analog devices AD5360, AD5361, AD5362, AD5363, AD5370, AD5371, AD5373 + * multi-channel Digital to Analog Converters driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define AD5360_CMD(x) ((x) << 22) +#define AD5360_ADDR(x) ((x) << 16) + +#define AD5360_READBACK_TYPE(x) ((x) << 13) +#define AD5360_READBACK_ADDR(x) ((x) << 7) + +#define AD5360_CHAN_ADDR(chan) ((chan) + 0x8) + +#define AD5360_CMD_WRITE_DATA 0x3 +#define AD5360_CMD_WRITE_OFFSET 0x2 +#define AD5360_CMD_WRITE_GAIN 0x1 +#define AD5360_CMD_SPECIAL_FUNCTION 0x0 + +/* Special function register addresses */ +#define AD5360_REG_SF_NOP 0x0 +#define AD5360_REG_SF_CTRL 0x1 +#define AD5360_REG_SF_OFS(x) (0x2 + (x)) +#define AD5360_REG_SF_READBACK 0x5 + +#define AD5360_SF_CTRL_PWR_DOWN BIT(0) + +#define AD5360_READBACK_X1A 0x0 +#define AD5360_READBACK_X1B 0x1 +#define AD5360_READBACK_OFFSET 0x2 +#define AD5360_READBACK_GAIN 0x3 +#define AD5360_READBACK_SF 0x4 + + +/** + * struct ad5360_chip_info - chip specific information + * @channel_template: channel specification template + * @num_channels: number of channels + * @channels_per_group: number of channels per group + * @num_vrefs: number of vref supplies for the chip +*/ + +struct ad5360_chip_info { + struct iio_chan_spec channel_template; + unsigned int num_channels; + unsigned int channels_per_group; + unsigned int num_vrefs; +}; + +/** + * struct ad5360_state - driver instance specific data + * @spi: spi_device + * @chip_info: chip model specific constants, available modes etc + * @vref_reg: vref supply regulators + * @ctrl: control register cache + * @data: spi transfer buffers + */ + +struct ad5360_state { + struct spi_device *spi; + const struct ad5360_chip_info *chip_info; + struct regulator_bulk_data vref_reg[3]; + unsigned int ctrl; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + union { + __be32 d32; + u8 d8[4]; + } data[2] ____cacheline_aligned; +}; + +enum ad5360_type { + ID_AD5360, + ID_AD5361, + ID_AD5362, + ID_AD5363, + ID_AD5370, + ID_AD5371, + ID_AD5372, + ID_AD5373, +}; + +#define AD5360_CHANNEL(bits) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ + .scan_type = IIO_ST('u', (bits), 16, 16 - (bits)) \ +} + +static const struct ad5360_chip_info ad5360_chip_info_tbl[] = { + [ID_AD5360] = { + .channel_template = AD5360_CHANNEL(16), + .num_channels = 16, + .channels_per_group = 8, + .num_vrefs = 2, + }, + [ID_AD5361] = { + .channel_template = AD5360_CHANNEL(14), + .num_channels = 16, + .channels_per_group = 8, + .num_vrefs = 2, + }, + [ID_AD5362] = { + .channel_template = AD5360_CHANNEL(16), + .num_channels = 8, + .channels_per_group = 4, + .num_vrefs = 2, + }, + [ID_AD5363] = { + .channel_template = AD5360_CHANNEL(14), + .num_channels = 8, + .channels_per_group = 4, + .num_vrefs = 2, + }, + [ID_AD5370] = { + .channel_template = AD5360_CHANNEL(16), + .num_channels = 40, + .channels_per_group = 8, + .num_vrefs = 2, + }, + [ID_AD5371] = { + .channel_template = AD5360_CHANNEL(14), + .num_channels = 40, + .channels_per_group = 8, + .num_vrefs = 3, + }, + [ID_AD5372] = { + .channel_template = AD5360_CHANNEL(16), + .num_channels = 32, + .channels_per_group = 8, + .num_vrefs = 2, + }, + [ID_AD5373] = { + .channel_template = AD5360_CHANNEL(14), + .num_channels = 32, + .channels_per_group = 8, + .num_vrefs = 2, + }, +}; + +static unsigned int ad5360_get_channel_vref_index(struct ad5360_state *st, + unsigned int channel) +{ + unsigned int i; + + /* The first groups have their own vref, while the remaining groups + * share the last vref */ + i = channel / st->chip_info->channels_per_group; + if (i >= st->chip_info->num_vrefs) + i = st->chip_info->num_vrefs - 1; + + return i; +} + +static int ad5360_get_channel_vref(struct ad5360_state *st, + unsigned int channel) +{ + unsigned int i = ad5360_get_channel_vref_index(st, channel); + + return regulator_get_voltage(st->vref_reg[i].consumer); +} + + +static int ad5360_write_unlocked(struct iio_dev *indio_dev, + unsigned int cmd, unsigned int addr, unsigned int val, + unsigned int shift) +{ + struct ad5360_state *st = iio_priv(indio_dev); + + val <<= shift; + val |= AD5360_CMD(cmd) | AD5360_ADDR(addr); + st->data[0].d32 = cpu_to_be32(val); + + return spi_write(st->spi, &st->data[0].d8[1], 3); +} + +static int ad5360_write(struct iio_dev *indio_dev, unsigned int cmd, + unsigned int addr, unsigned int val, unsigned int shift) +{ + int ret; + + mutex_lock(&indio_dev->mlock); + ret = ad5360_write_unlocked(indio_dev, cmd, addr, val, shift); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5360_read(struct iio_dev *indio_dev, unsigned int type, + unsigned int addr) +{ + struct ad5360_state *st = iio_priv(indio_dev); + struct spi_message m; + int ret; + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0].d8[1], + .len = 3, + .cs_change = 1, + }, { + .rx_buf = &st->data[1].d8[1], + .len = 3, + }, + }; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + mutex_lock(&indio_dev->mlock); + + st->data[0].d32 = cpu_to_be32(AD5360_CMD(AD5360_CMD_SPECIAL_FUNCTION) | + AD5360_ADDR(AD5360_REG_SF_READBACK) | + AD5360_READBACK_TYPE(type) | + AD5360_READBACK_ADDR(addr)); + + ret = spi_sync(st->spi, &m); + if (ret >= 0) + ret = be32_to_cpu(st->data[1].d32) & 0xffff; + + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static ssize_t ad5360_read_dac_powerdown(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ad5360_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", (bool)(st->ctrl & AD5360_SF_CTRL_PWR_DOWN)); +} + +static int ad5360_update_ctrl(struct iio_dev *indio_dev, unsigned int set, + unsigned int clr) +{ + struct ad5360_state *st = iio_priv(indio_dev); + unsigned int ret; + + mutex_lock(&indio_dev->mlock); + + st->ctrl |= set; + st->ctrl &= ~clr; + + ret = ad5360_write_unlocked(indio_dev, AD5360_CMD_SPECIAL_FUNCTION, + AD5360_REG_SF_CTRL, st->ctrl, 0); + + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static ssize_t ad5360_write_dac_powerdown(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + bool pwr_down; + int ret; + + ret = strtobool(buf, &pwr_down); + if (ret) + return ret; + + if (pwr_down) + ret = ad5360_update_ctrl(indio_dev, AD5360_SF_CTRL_PWR_DOWN, 0); + else + ret = ad5360_update_ctrl(indio_dev, 0, AD5360_SF_CTRL_PWR_DOWN); + + return ret ? ret : len; +} + +static IIO_DEVICE_ATTR(out_voltage_powerdown, + S_IRUGO | S_IWUSR, + ad5360_read_dac_powerdown, + ad5360_write_dac_powerdown, 0); + +static struct attribute *ad5360_attributes[] = { + &iio_dev_attr_out_voltage_powerdown.dev_attr.attr, + NULL, +}; + +static const struct attribute_group ad5360_attribute_group = { + .attrs = ad5360_attributes, +}; + +static int ad5360_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct ad5360_state *st = iio_priv(indio_dev); + int max_val = (1 << chan->scan_type.realbits); + unsigned int ofs_index; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (val >= max_val || val < 0) + return -EINVAL; + + return ad5360_write(indio_dev, AD5360_CMD_WRITE_DATA, + chan->address, val, chan->scan_type.shift); + + case IIO_CHAN_INFO_CALIBBIAS: + if (val >= max_val || val < 0) + return -EINVAL; + + return ad5360_write(indio_dev, AD5360_CMD_WRITE_OFFSET, + chan->address, val, chan->scan_type.shift); + + case IIO_CHAN_INFO_CALIBSCALE: + if (val >= max_val || val < 0) + return -EINVAL; + + return ad5360_write(indio_dev, AD5360_CMD_WRITE_GAIN, + chan->address, val, chan->scan_type.shift); + + case IIO_CHAN_INFO_OFFSET: + if (val <= -max_val || val > 0) + return -EINVAL; + + val = -val; + + /* offset is supposed to have the same scale as raw, but it + * is always 14bits wide, so on a chip where the raw value has + * more bits, we need to shift offset. */ + val >>= (chan->scan_type.realbits - 14); + + /* There is one DAC offset register per vref. Changing one + * channels offset will also change the offset for all other + * channels which share the same vref supply. */ + ofs_index = ad5360_get_channel_vref_index(st, chan->channel); + return ad5360_write(indio_dev, AD5360_CMD_SPECIAL_FUNCTION, + AD5360_REG_SF_OFS(ofs_index), val, 0); + default: + break; + } + + return -EINVAL; +} + +static int ad5360_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct ad5360_state *st = iio_priv(indio_dev); + unsigned int ofs_index; + int scale_uv; + int ret; + + switch (m) { + case IIO_CHAN_INFO_RAW: + ret = ad5360_read(indio_dev, AD5360_READBACK_X1A, + chan->address); + if (ret < 0) + return ret; + *val = ret >> chan->scan_type.shift; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + /* vout = 4 * vref * dac_code */ + scale_uv = ad5360_get_channel_vref(st, chan->channel) * 4 * 100; + if (scale_uv < 0) + return scale_uv; + + scale_uv >>= (chan->scan_type.realbits); + *val = scale_uv / 100000; + *val2 = (scale_uv % 100000) * 10; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_CALIBBIAS: + ret = ad5360_read(indio_dev, AD5360_READBACK_OFFSET, + chan->address); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBSCALE: + ret = ad5360_read(indio_dev, AD5360_READBACK_GAIN, + chan->address); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_OFFSET: + ofs_index = ad5360_get_channel_vref_index(st, chan->channel); + ret = ad5360_read(indio_dev, AD5360_READBACK_SF, + AD5360_REG_SF_OFS(ofs_index)); + if (ret < 0) + return ret; + + ret <<= (chan->scan_type.realbits - 14); + *val = -ret; + return IIO_VAL_INT; + } + + return -EINVAL; +} + +static const struct iio_info ad5360_info = { + .read_raw = ad5360_read_raw, + .write_raw = ad5360_write_raw, + .attrs = &ad5360_attribute_group, + .driver_module = THIS_MODULE, +}; + +static const char * const ad5360_vref_name[] = { + "vref0", "vref1", "vref2" +}; + +static int __devinit ad5360_alloc_channels(struct iio_dev *indio_dev) +{ + struct ad5360_state *st = iio_priv(indio_dev); + struct iio_chan_spec *channels; + unsigned int i; + + channels = kcalloc(st->chip_info->num_channels, + sizeof(struct iio_chan_spec), GFP_KERNEL); + + if (!channels) + return -ENOMEM; + + for (i = 0; i < st->chip_info->num_channels; ++i) { + channels[i] = st->chip_info->channel_template; + channels[i].channel = i; + channels[i].address = AD5360_CHAN_ADDR(i); + } + + indio_dev->channels = channels; + + return 0; +} + +static int __devinit ad5360_probe(struct spi_device *spi) +{ + enum ad5360_type type = spi_get_device_id(spi)->driver_data; + struct iio_dev *indio_dev; + struct ad5360_state *st; + unsigned int i; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + dev_err(&spi->dev, "Failed to allocate iio device\n"); + return -ENOMEM; + } + + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->chip_info = &ad5360_chip_info_tbl[type]; + st->spi = spi; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->info = &ad5360_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->num_channels = st->chip_info->num_channels; + + ret = ad5360_alloc_channels(indio_dev); + if (ret) { + dev_err(&spi->dev, "Failed to allocate channel spec: %d\n", ret); + goto error_free; + } + + for (i = 0; i < st->chip_info->num_vrefs; ++i) + st->vref_reg[i].supply = ad5360_vref_name[i]; + + ret = regulator_bulk_get(&st->spi->dev, st->chip_info->num_vrefs, + st->vref_reg); + if (ret) { + dev_err(&spi->dev, "Failed to request vref regulators: %d\n", ret); + goto error_free_channels; + } + + ret = regulator_bulk_enable(st->chip_info->num_vrefs, st->vref_reg); + if (ret) { + dev_err(&spi->dev, "Failed to enable vref regulators: %d\n", ret); + goto error_free_reg; + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&spi->dev, "Failed to register iio device: %d\n", ret); + goto error_disable_reg; + } + + return 0; + +error_disable_reg: + regulator_bulk_disable(st->chip_info->num_vrefs, st->vref_reg); +error_free_reg: + regulator_bulk_free(st->chip_info->num_vrefs, st->vref_reg); +error_free_channels: + kfree(indio_dev->channels); +error_free: + iio_device_free(indio_dev); + + return ret; +} + +static int __devexit ad5360_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5360_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + kfree(indio_dev->channels); + + regulator_bulk_disable(st->chip_info->num_vrefs, st->vref_reg); + regulator_bulk_free(st->chip_info->num_vrefs, st->vref_reg); + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5360_ids[] = { + { "ad5360", ID_AD5360 }, + { "ad5361", ID_AD5361 }, + { "ad5362", ID_AD5362 }, + { "ad5363", ID_AD5363 }, + { "ad5370", ID_AD5370 }, + { "ad5371", ID_AD5371 }, + { "ad5372", ID_AD5372 }, + { "ad5373", ID_AD5373 }, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5360_ids); + +static struct spi_driver ad5360_driver = { + .driver = { + .name = "ad5360", + .owner = THIS_MODULE, + }, + .probe = ad5360_probe, + .remove = __devexit_p(ad5360_remove), + .id_table = ad5360_ids, +}; +module_spi_driver(ad5360_driver); + +MODULE_AUTHOR("Lars-Peter Clausen "); +MODULE_DESCRIPTION("Analog Devices AD5360/61/62/63/70/71/72/73 DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5380.c b/drivers/iio/dac/ad5380.c new file mode 100644 index 000000000000..5dfb4451728f --- /dev/null +++ b/drivers/iio/dac/ad5380.c @@ -0,0 +1,657 @@ +/* + * Analog devices AD5380, AD5381, AD5382, AD5383, AD5390, AD5391, AD5392 + * multi-channel Digital to Analog Converters driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define AD5380_REG_DATA(x) (((x) << 2) | 3) +#define AD5380_REG_OFFSET(x) (((x) << 2) | 2) +#define AD5380_REG_GAIN(x) (((x) << 2) | 1) +#define AD5380_REG_SF_PWR_DOWN (8 << 2) +#define AD5380_REG_SF_PWR_UP (9 << 2) +#define AD5380_REG_SF_CTRL (12 << 2) + +#define AD5380_CTRL_PWR_DOWN_MODE_OFFSET 13 +#define AD5380_CTRL_INT_VREF_2V5 BIT(12) +#define AD5380_CTRL_INT_VREF_EN BIT(10) + +/** + * struct ad5380_chip_info - chip specific information + * @channel_template: channel specification template + * @num_channels: number of channels + * @int_vref: internal vref in uV +*/ + +struct ad5380_chip_info { + struct iio_chan_spec channel_template; + unsigned int num_channels; + unsigned int int_vref; +}; + +/** + * struct ad5380_state - driver instance specific data + * @regmap: regmap instance used by the device + * @chip_info: chip model specific constants, available modes etc + * @vref_reg: vref supply regulator + * @vref: actual reference voltage used in uA + * @pwr_down: whether the chip is currently in power down mode + */ + +struct ad5380_state { + struct regmap *regmap; + const struct ad5380_chip_info *chip_info; + struct regulator *vref_reg; + int vref; + bool pwr_down; +}; + +enum ad5380_type { + ID_AD5380_3, + ID_AD5380_5, + ID_AD5381_3, + ID_AD5381_5, + ID_AD5382_3, + ID_AD5382_5, + ID_AD5383_3, + ID_AD5383_5, + ID_AD5390_3, + ID_AD5390_5, + ID_AD5391_3, + ID_AD5391_5, + ID_AD5392_3, + ID_AD5392_5, +}; + +static ssize_t ad5380_read_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, char *buf) +{ + struct ad5380_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", st->pwr_down); +} + +static ssize_t ad5380_write_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, const char *buf, + size_t len) +{ + struct ad5380_state *st = iio_priv(indio_dev); + bool pwr_down; + int ret; + + ret = strtobool(buf, &pwr_down); + if (ret) + return ret; + + mutex_lock(&indio_dev->mlock); + + if (pwr_down) + ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_DOWN, 0); + else + ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_UP, 0); + + st->pwr_down = pwr_down; + + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : len; +} + +static const char * const ad5380_powerdown_modes[] = { + "100kohm_to_gnd", + "three_state", +}; + +static int ad5380_get_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad5380_state *st = iio_priv(indio_dev); + unsigned int mode; + int ret; + + ret = regmap_read(st->regmap, AD5380_REG_SF_CTRL, &mode); + if (ret) + return ret; + + mode = (mode >> AD5380_CTRL_PWR_DOWN_MODE_OFFSET) & 1; + + return mode; +} + +static int ad5380_set_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int mode) +{ + struct ad5380_state *st = iio_priv(indio_dev); + int ret; + + ret = regmap_update_bits(st->regmap, AD5380_REG_SF_CTRL, + 1 << AD5380_CTRL_PWR_DOWN_MODE_OFFSET, + mode << AD5380_CTRL_PWR_DOWN_MODE_OFFSET); + + return ret; +} + +static const struct iio_enum ad5380_powerdown_mode_enum = { + .items = ad5380_powerdown_modes, + .num_items = ARRAY_SIZE(ad5380_powerdown_modes), + .get = ad5380_get_powerdown_mode, + .set = ad5380_set_powerdown_mode, +}; + +static unsigned int ad5380_info_to_reg(struct iio_chan_spec const *chan, + long info) +{ + switch (info) { + case 0: + return AD5380_REG_DATA(chan->address); + case IIO_CHAN_INFO_CALIBBIAS: + return AD5380_REG_OFFSET(chan->address); + case IIO_CHAN_INFO_CALIBSCALE: + return AD5380_REG_GAIN(chan->address); + default: + break; + } + + return 0; +} + +static int ad5380_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long info) +{ + const unsigned int max_val = (1 << chan->scan_type.realbits); + struct ad5380_state *st = iio_priv(indio_dev); + + switch (info) { + case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_CALIBSCALE: + if (val >= max_val || val < 0) + return -EINVAL; + + return regmap_write(st->regmap, + ad5380_info_to_reg(chan, info), + val << chan->scan_type.shift); + case IIO_CHAN_INFO_CALIBBIAS: + val += (1 << chan->scan_type.realbits) / 2; + if (val >= max_val || val < 0) + return -EINVAL; + + return regmap_write(st->regmap, + AD5380_REG_OFFSET(chan->address), + val << chan->scan_type.shift); + default: + break; + } + return -EINVAL; +} + +static int ad5380_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long info) +{ + struct ad5380_state *st = iio_priv(indio_dev); + unsigned long scale_uv; + int ret; + + switch (info) { + case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_CALIBSCALE: + ret = regmap_read(st->regmap, ad5380_info_to_reg(chan, info), + val); + if (ret) + return ret; + *val >>= chan->scan_type.shift; + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBBIAS: + ret = regmap_read(st->regmap, AD5380_REG_OFFSET(chan->address), + val); + if (ret) + return ret; + *val >>= chan->scan_type.shift; + val -= (1 << chan->scan_type.realbits) / 2; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + scale_uv = ((2 * st->vref) >> chan->scan_type.realbits) * 100; + *val = scale_uv / 100000; + *val2 = (scale_uv % 100000) * 10; + return IIO_VAL_INT_PLUS_MICRO; + default: + break; + } + + return -EINVAL; +} + +static const struct iio_info ad5380_info = { + .read_raw = ad5380_read_raw, + .write_raw = ad5380_write_raw, + .driver_module = THIS_MODULE, +}; + +static struct iio_chan_spec_ext_info ad5380_ext_info[] = { + { + .name = "powerdown", + .read = ad5380_read_dac_powerdown, + .write = ad5380_write_dac_powerdown, + }, + IIO_ENUM("powerdown_mode", true, &ad5380_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", &ad5380_powerdown_mode_enum), + { }, +}; + +#define AD5380_CHANNEL(_bits) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ + .scan_type = IIO_ST('u', (_bits), 16, 14 - (_bits)), \ + .ext_info = ad5380_ext_info, \ +} + +static const struct ad5380_chip_info ad5380_chip_info_tbl[] = { + [ID_AD5380_3] = { + .channel_template = AD5380_CHANNEL(14), + .num_channels = 40, + .int_vref = 1250000, + }, + [ID_AD5380_5] = { + .channel_template = AD5380_CHANNEL(14), + .num_channels = 40, + .int_vref = 2500000, + }, + [ID_AD5381_3] = { + .channel_template = AD5380_CHANNEL(12), + .num_channels = 16, + .int_vref = 1250000, + }, + [ID_AD5381_5] = { + .channel_template = AD5380_CHANNEL(12), + .num_channels = 16, + .int_vref = 2500000, + }, + [ID_AD5382_3] = { + .channel_template = AD5380_CHANNEL(14), + .num_channels = 32, + .int_vref = 1250000, + }, + [ID_AD5382_5] = { + .channel_template = AD5380_CHANNEL(14), + .num_channels = 32, + .int_vref = 2500000, + }, + [ID_AD5383_3] = { + .channel_template = AD5380_CHANNEL(12), + .num_channels = 32, + .int_vref = 1250000, + }, + [ID_AD5383_5] = { + .channel_template = AD5380_CHANNEL(12), + .num_channels = 32, + .int_vref = 2500000, + }, + [ID_AD5390_3] = { + .channel_template = AD5380_CHANNEL(14), + .num_channels = 16, + .int_vref = 1250000, + }, + [ID_AD5390_5] = { + .channel_template = AD5380_CHANNEL(14), + .num_channels = 16, + .int_vref = 2500000, + }, + [ID_AD5391_3] = { + .channel_template = AD5380_CHANNEL(12), + .num_channels = 16, + .int_vref = 1250000, + }, + [ID_AD5391_5] = { + .channel_template = AD5380_CHANNEL(12), + .num_channels = 16, + .int_vref = 2500000, + }, + [ID_AD5392_3] = { + .channel_template = AD5380_CHANNEL(14), + .num_channels = 8, + .int_vref = 1250000, + }, + [ID_AD5392_5] = { + .channel_template = AD5380_CHANNEL(14), + .num_channels = 8, + .int_vref = 2500000, + }, +}; + +static int __devinit ad5380_alloc_channels(struct iio_dev *indio_dev) +{ + struct ad5380_state *st = iio_priv(indio_dev); + struct iio_chan_spec *channels; + unsigned int i; + + channels = kcalloc(st->chip_info->num_channels, + sizeof(struct iio_chan_spec), GFP_KERNEL); + + if (!channels) + return -ENOMEM; + + for (i = 0; i < st->chip_info->num_channels; ++i) { + channels[i] = st->chip_info->channel_template; + channels[i].channel = i; + channels[i].address = i; + } + + indio_dev->channels = channels; + + return 0; +} + +static int __devinit ad5380_probe(struct device *dev, struct regmap *regmap, + enum ad5380_type type, const char *name) +{ + struct iio_dev *indio_dev; + struct ad5380_state *st; + unsigned int ctrl = 0; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + dev_err(dev, "Failed to allocate iio device\n"); + ret = -ENOMEM; + goto error_regmap_exit; + } + + st = iio_priv(indio_dev); + dev_set_drvdata(dev, indio_dev); + + st->chip_info = &ad5380_chip_info_tbl[type]; + st->regmap = regmap; + + indio_dev->dev.parent = dev; + indio_dev->name = name; + indio_dev->info = &ad5380_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->num_channels = st->chip_info->num_channels; + + ret = ad5380_alloc_channels(indio_dev); + if (ret) { + dev_err(dev, "Failed to allocate channel spec: %d\n", ret); + goto error_free; + } + + if (st->chip_info->int_vref == 2500000) + ctrl |= AD5380_CTRL_INT_VREF_2V5; + + st->vref_reg = regulator_get(dev, "vref"); + if (!IS_ERR(st->vref_reg)) { + ret = regulator_enable(st->vref_reg); + if (ret) { + dev_err(dev, "Failed to enable vref regulators: %d\n", + ret); + goto error_free_reg; + } + + st->vref = regulator_get_voltage(st->vref_reg); + } else { + st->vref = st->chip_info->int_vref; + ctrl |= AD5380_CTRL_INT_VREF_EN; + } + + ret = regmap_write(st->regmap, AD5380_REG_SF_CTRL, ctrl); + if (ret) { + dev_err(dev, "Failed to write to device: %d\n", ret); + goto error_disable_reg; + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(dev, "Failed to register iio device: %d\n", ret); + goto error_disable_reg; + } + + return 0; + +error_disable_reg: + if (!IS_ERR(st->vref_reg)) + regulator_disable(st->vref_reg); +error_free_reg: + if (!IS_ERR(st->vref_reg)) + regulator_put(st->vref_reg); + + kfree(indio_dev->channels); +error_free: + iio_device_free(indio_dev); +error_regmap_exit: + regmap_exit(regmap); + + return ret; +} + +static int __devexit ad5380_remove(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ad5380_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + kfree(indio_dev->channels); + + if (!IS_ERR(st->vref_reg)) { + regulator_disable(st->vref_reg); + regulator_put(st->vref_reg); + } + + regmap_exit(st->regmap); + iio_device_free(indio_dev); + + return 0; +} + +static bool ad5380_reg_false(struct device *dev, unsigned int reg) +{ + return false; +} + +static const struct regmap_config ad5380_regmap_config = { + .reg_bits = 10, + .val_bits = 14, + + .max_register = AD5380_REG_DATA(40), + .cache_type = REGCACHE_RBTREE, + + .volatile_reg = ad5380_reg_false, + .readable_reg = ad5380_reg_false, +}; + +#if IS_ENABLED(CONFIG_SPI_MASTER) + +static int __devinit ad5380_spi_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + struct regmap *regmap; + + regmap = regmap_init_spi(spi, &ad5380_regmap_config); + + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return ad5380_probe(&spi->dev, regmap, id->driver_data, id->name); +} + +static int __devexit ad5380_spi_remove(struct spi_device *spi) +{ + return ad5380_remove(&spi->dev); +} + +static const struct spi_device_id ad5380_spi_ids[] = { + { "ad5380-3", ID_AD5380_3 }, + { "ad5380-5", ID_AD5380_5 }, + { "ad5381-3", ID_AD5381_3 }, + { "ad5381-5", ID_AD5381_5 }, + { "ad5382-3", ID_AD5382_3 }, + { "ad5382-5", ID_AD5382_5 }, + { "ad5383-3", ID_AD5383_3 }, + { "ad5383-5", ID_AD5383_5 }, + { "ad5384-3", ID_AD5380_3 }, + { "ad5384-5", ID_AD5380_5 }, + { "ad5390-3", ID_AD5390_3 }, + { "ad5390-5", ID_AD5390_5 }, + { "ad5391-3", ID_AD5391_3 }, + { "ad5391-5", ID_AD5391_5 }, + { "ad5392-3", ID_AD5392_3 }, + { "ad5392-5", ID_AD5392_5 }, + { } +}; +MODULE_DEVICE_TABLE(spi, ad5380_spi_ids); + +static struct spi_driver ad5380_spi_driver = { + .driver = { + .name = "ad5380", + .owner = THIS_MODULE, + }, + .probe = ad5380_spi_probe, + .remove = __devexit_p(ad5380_spi_remove), + .id_table = ad5380_spi_ids, +}; + +static inline int ad5380_spi_register_driver(void) +{ + return spi_register_driver(&ad5380_spi_driver); +} + +static inline void ad5380_spi_unregister_driver(void) +{ + spi_unregister_driver(&ad5380_spi_driver); +} + +#else + +static inline int ad5380_spi_register_driver(void) +{ + return 0; +} + +static inline void ad5380_spi_unregister_driver(void) +{ +} + +#endif + +#if IS_ENABLED(CONFIG_I2C) + +static int __devinit ad5380_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct regmap *regmap; + + regmap = regmap_init_i2c(i2c, &ad5380_regmap_config); + + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return ad5380_probe(&i2c->dev, regmap, id->driver_data, id->name); +} + +static int __devexit ad5380_i2c_remove(struct i2c_client *i2c) +{ + return ad5380_remove(&i2c->dev); +} + +static const struct i2c_device_id ad5380_i2c_ids[] = { + { "ad5380-3", ID_AD5380_3 }, + { "ad5380-5", ID_AD5380_5 }, + { "ad5381-3", ID_AD5381_3 }, + { "ad5381-5", ID_AD5381_5 }, + { "ad5382-3", ID_AD5382_3 }, + { "ad5382-5", ID_AD5382_5 }, + { "ad5383-3", ID_AD5383_3 }, + { "ad5383-5", ID_AD5383_5 }, + { "ad5384-3", ID_AD5380_3 }, + { "ad5384-5", ID_AD5380_5 }, + { "ad5390-3", ID_AD5390_3 }, + { "ad5390-5", ID_AD5390_5 }, + { "ad5391-3", ID_AD5391_3 }, + { "ad5391-5", ID_AD5391_5 }, + { "ad5392-3", ID_AD5392_3 }, + { "ad5392-5", ID_AD5392_5 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ad5380_i2c_ids); + +static struct i2c_driver ad5380_i2c_driver = { + .driver = { + .name = "ad5380", + .owner = THIS_MODULE, + }, + .probe = ad5380_i2c_probe, + .remove = __devexit_p(ad5380_i2c_remove), + .id_table = ad5380_i2c_ids, +}; + +static inline int ad5380_i2c_register_driver(void) +{ + return i2c_add_driver(&ad5380_i2c_driver); +} + +static inline void ad5380_i2c_unregister_driver(void) +{ + i2c_del_driver(&ad5380_i2c_driver); +} + +#else + +static inline int ad5380_i2c_register_driver(void) +{ + return 0; +} + +static inline void ad5380_i2c_unregister_driver(void) +{ +} + +#endif + +static int __init ad5380_spi_init(void) +{ + int ret; + + ret = ad5380_spi_register_driver(); + if (ret) + return ret; + + ret = ad5380_i2c_register_driver(); + if (ret) { + ad5380_spi_unregister_driver(); + return ret; + } + + return 0; +} +module_init(ad5380_spi_init); + +static void __exit ad5380_spi_exit(void) +{ + ad5380_i2c_unregister_driver(); + ad5380_spi_unregister_driver(); + +} +module_exit(ad5380_spi_exit); + +MODULE_AUTHOR("Lars-Peter Clausen "); +MODULE_DESCRIPTION("Analog Devices AD5380/81/82/83/84/90/91/92 DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5421.c b/drivers/iio/dac/ad5421.c new file mode 100644 index 000000000000..cdbc5bf25c31 --- /dev/null +++ b/drivers/iio/dac/ad5421.c @@ -0,0 +1,544 @@ +/* + * AD5421 Digital to analog converters driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + + +#define AD5421_REG_DAC_DATA 0x1 +#define AD5421_REG_CTRL 0x2 +#define AD5421_REG_OFFSET 0x3 +#define AD5421_REG_GAIN 0x4 +/* load dac and fault shared the same register number. Writing to it will cause + * a dac load command, reading from it will return the fault status register */ +#define AD5421_REG_LOAD_DAC 0x5 +#define AD5421_REG_FAULT 0x5 +#define AD5421_REG_FORCE_ALARM_CURRENT 0x6 +#define AD5421_REG_RESET 0x7 +#define AD5421_REG_START_CONVERSION 0x8 +#define AD5421_REG_NOOP 0x9 + +#define AD5421_CTRL_WATCHDOG_DISABLE BIT(12) +#define AD5421_CTRL_AUTO_FAULT_READBACK BIT(11) +#define AD5421_CTRL_MIN_CURRENT BIT(9) +#define AD5421_CTRL_ADC_SOURCE_TEMP BIT(8) +#define AD5421_CTRL_ADC_ENABLE BIT(7) +#define AD5421_CTRL_PWR_DOWN_INT_VREF BIT(6) + +#define AD5421_FAULT_SPI BIT(15) +#define AD5421_FAULT_PEC BIT(14) +#define AD5421_FAULT_OVER_CURRENT BIT(13) +#define AD5421_FAULT_UNDER_CURRENT BIT(12) +#define AD5421_FAULT_TEMP_OVER_140 BIT(11) +#define AD5421_FAULT_TEMP_OVER_100 BIT(10) +#define AD5421_FAULT_UNDER_VOLTAGE_6V BIT(9) +#define AD5421_FAULT_UNDER_VOLTAGE_12V BIT(8) + +/* These bits will cause the fault pin to go high */ +#define AD5421_FAULT_TRIGGER_IRQ \ + (AD5421_FAULT_SPI | AD5421_FAULT_PEC | AD5421_FAULT_OVER_CURRENT | \ + AD5421_FAULT_UNDER_CURRENT | AD5421_FAULT_TEMP_OVER_140) + +/** + * struct ad5421_state - driver instance specific data + * @spi: spi_device + * @ctrl: control register cache + * @current_range: current range which the device is configured for + * @data: spi transfer buffers + * @fault_mask: software masking of events + */ +struct ad5421_state { + struct spi_device *spi; + unsigned int ctrl; + enum ad5421_current_range current_range; + unsigned int fault_mask; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + union { + u32 d32; + u8 d8[4]; + } data[2] ____cacheline_aligned; +}; + +static const struct iio_chan_spec ad5421_channels[] = { + { + .type = IIO_CURRENT, + .indexed = 1, + .output = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_OFFSET_SHARED_BIT | + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .scan_type = IIO_ST('u', 16, 16, 0), + .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | + IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), + }, + { + .type = IIO_TEMP, + .channel = -1, + .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), + }, +}; + +static int ad5421_write_unlocked(struct iio_dev *indio_dev, + unsigned int reg, unsigned int val) +{ + struct ad5421_state *st = iio_priv(indio_dev); + + st->data[0].d32 = cpu_to_be32((reg << 16) | val); + + return spi_write(st->spi, &st->data[0].d8[1], 3); +} + +static int ad5421_write(struct iio_dev *indio_dev, unsigned int reg, + unsigned int val) +{ + int ret; + + mutex_lock(&indio_dev->mlock); + ret = ad5421_write_unlocked(indio_dev, reg, val); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5421_read(struct iio_dev *indio_dev, unsigned int reg) +{ + struct ad5421_state *st = iio_priv(indio_dev); + struct spi_message m; + int ret; + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0].d8[1], + .len = 3, + .cs_change = 1, + }, { + .rx_buf = &st->data[1].d8[1], + .len = 3, + }, + }; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + mutex_lock(&indio_dev->mlock); + + st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16)); + + ret = spi_sync(st->spi, &m); + if (ret >= 0) + ret = be32_to_cpu(st->data[1].d32) & 0xffff; + + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5421_update_ctrl(struct iio_dev *indio_dev, unsigned int set, + unsigned int clr) +{ + struct ad5421_state *st = iio_priv(indio_dev); + unsigned int ret; + + mutex_lock(&indio_dev->mlock); + + st->ctrl &= ~clr; + st->ctrl |= set; + + ret = ad5421_write_unlocked(indio_dev, AD5421_REG_CTRL, st->ctrl); + + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static irqreturn_t ad5421_fault_handler(int irq, void *data) +{ + struct iio_dev *indio_dev = data; + struct ad5421_state *st = iio_priv(indio_dev); + unsigned int fault; + unsigned int old_fault = 0; + unsigned int events; + + fault = ad5421_read(indio_dev, AD5421_REG_FAULT); + if (!fault) + return IRQ_NONE; + + /* If we had a fault, this might mean that the DAC has lost its state + * and has been reset. Make sure that the control register actually + * contains what we expect it to contain. Otherwise the watchdog might + * be enabled and we get watchdog timeout faults, which will render the + * DAC unusable. */ + ad5421_update_ctrl(indio_dev, 0, 0); + + + /* The fault pin stays high as long as a fault condition is present and + * it is not possible to mask fault conditions. For certain fault + * conditions for example like over-temperature it takes some time + * until the fault condition disappears. If we would exit the interrupt + * handler immediately after handling the event it would be entered + * again instantly. Thus we fall back to polling in case we detect that + * a interrupt condition is still present. + */ + do { + /* 0xffff is a invalid value for the register and will only be + * read if there has been a communication error */ + if (fault == 0xffff) + fault = 0; + + /* we are only interested in new events */ + events = (old_fault ^ fault) & fault; + events &= st->fault_mask; + + if (events & AD5421_FAULT_OVER_CURRENT) { + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_CURRENT, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + iio_get_time_ns()); + } + + if (events & AD5421_FAULT_UNDER_CURRENT) { + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_CURRENT, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + iio_get_time_ns()); + } + + if (events & AD5421_FAULT_TEMP_OVER_140) { + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_TEMP, + 0, + IIO_EV_TYPE_MAG, + IIO_EV_DIR_RISING), + iio_get_time_ns()); + } + + old_fault = fault; + fault = ad5421_read(indio_dev, AD5421_REG_FAULT); + + /* still active? go to sleep for some time */ + if (fault & AD5421_FAULT_TRIGGER_IRQ) + msleep(1000); + + } while (fault & AD5421_FAULT_TRIGGER_IRQ); + + + return IRQ_HANDLED; +} + +static void ad5421_get_current_min_max(struct ad5421_state *st, + unsigned int *min, unsigned int *max) +{ + /* The current range is configured using external pins, which are + * usually hard-wired and not run-time switchable. */ + switch (st->current_range) { + case AD5421_CURRENT_RANGE_4mA_20mA: + *min = 4000; + *max = 20000; + break; + case AD5421_CURRENT_RANGE_3mA8_21mA: + *min = 3800; + *max = 21000; + break; + case AD5421_CURRENT_RANGE_3mA2_24mA: + *min = 3200; + *max = 24000; + break; + default: + *min = 0; + *max = 1; + break; + } +} + +static inline unsigned int ad5421_get_offset(struct ad5421_state *st) +{ + unsigned int min, max; + + ad5421_get_current_min_max(st, &min, &max); + return (min * (1 << 16)) / (max - min); +} + +static inline unsigned int ad5421_get_scale(struct ad5421_state *st) +{ + unsigned int min, max; + + ad5421_get_current_min_max(st, &min, &max); + return ((max - min) * 1000) / (1 << 16); +} + +static int ad5421_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long m) +{ + struct ad5421_state *st = iio_priv(indio_dev); + int ret; + + if (chan->type != IIO_CURRENT) + return -EINVAL; + + switch (m) { + case IIO_CHAN_INFO_RAW: + ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + *val2 = ad5421_get_scale(st); + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_OFFSET: + *val = ad5421_get_offset(st); + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBBIAS: + ret = ad5421_read(indio_dev, AD5421_REG_OFFSET); + if (ret < 0) + return ret; + *val = ret - 32768; + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBSCALE: + ret = ad5421_read(indio_dev, AD5421_REG_GAIN); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + } + + return -EINVAL; +} + +static int ad5421_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + const unsigned int max_val = 1 << 16; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (val >= max_val || val < 0) + return -EINVAL; + + return ad5421_write(indio_dev, AD5421_REG_DAC_DATA, val); + case IIO_CHAN_INFO_CALIBBIAS: + val += 32768; + if (val >= max_val || val < 0) + return -EINVAL; + + return ad5421_write(indio_dev, AD5421_REG_OFFSET, val); + case IIO_CHAN_INFO_CALIBSCALE: + if (val >= max_val || val < 0) + return -EINVAL; + + return ad5421_write(indio_dev, AD5421_REG_GAIN, val); + default: + break; + } + + return -EINVAL; +} + +static int ad5421_write_event_config(struct iio_dev *indio_dev, + u64 event_code, int state) +{ + struct ad5421_state *st = iio_priv(indio_dev); + unsigned int mask; + + switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { + case IIO_CURRENT: + if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == + IIO_EV_DIR_RISING) + mask = AD5421_FAULT_OVER_CURRENT; + else + mask = AD5421_FAULT_UNDER_CURRENT; + break; + case IIO_TEMP: + mask = AD5421_FAULT_TEMP_OVER_140; + break; + default: + return -EINVAL; + } + + mutex_lock(&indio_dev->mlock); + if (state) + st->fault_mask |= mask; + else + st->fault_mask &= ~mask; + mutex_unlock(&indio_dev->mlock); + + return 0; +} + +static int ad5421_read_event_config(struct iio_dev *indio_dev, + u64 event_code) +{ + struct ad5421_state *st = iio_priv(indio_dev); + unsigned int mask; + + switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { + case IIO_CURRENT: + if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == + IIO_EV_DIR_RISING) + mask = AD5421_FAULT_OVER_CURRENT; + else + mask = AD5421_FAULT_UNDER_CURRENT; + break; + case IIO_TEMP: + mask = AD5421_FAULT_TEMP_OVER_140; + break; + default: + return -EINVAL; + } + + return (bool)(st->fault_mask & mask); +} + +static int ad5421_read_event_value(struct iio_dev *indio_dev, u64 event_code, + int *val) +{ + int ret; + + switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { + case IIO_CURRENT: + ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA); + if (ret < 0) + return ret; + *val = ret; + break; + case IIO_TEMP: + *val = 140000; + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct iio_info ad5421_info = { + .read_raw = ad5421_read_raw, + .write_raw = ad5421_write_raw, + .read_event_config = ad5421_read_event_config, + .write_event_config = ad5421_write_event_config, + .read_event_value = ad5421_read_event_value, + .driver_module = THIS_MODULE, +}; + +static int __devinit ad5421_probe(struct spi_device *spi) +{ + struct ad5421_platform_data *pdata = dev_get_platdata(&spi->dev); + struct iio_dev *indio_dev; + struct ad5421_state *st; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + dev_err(&spi->dev, "Failed to allocate iio device\n"); + return -ENOMEM; + } + + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->spi = spi; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = "ad5421"; + indio_dev->info = &ad5421_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = ad5421_channels; + indio_dev->num_channels = ARRAY_SIZE(ad5421_channels); + + st->ctrl = AD5421_CTRL_WATCHDOG_DISABLE | + AD5421_CTRL_AUTO_FAULT_READBACK; + + if (pdata) { + st->current_range = pdata->current_range; + if (pdata->external_vref) + st->ctrl |= AD5421_CTRL_PWR_DOWN_INT_VREF; + } else { + st->current_range = AD5421_CURRENT_RANGE_4mA_20mA; + } + + /* write initial ctrl register value */ + ad5421_update_ctrl(indio_dev, 0, 0); + + if (spi->irq) { + ret = request_threaded_irq(spi->irq, + NULL, + ad5421_fault_handler, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "ad5421 fault", + indio_dev); + if (ret) + goto error_free; + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&spi->dev, "Failed to register iio device: %d\n", ret); + goto error_free_irq; + } + + return 0; + +error_free_irq: + if (spi->irq) + free_irq(spi->irq, indio_dev); +error_free: + iio_device_free(indio_dev); + + return ret; +} + +static int __devexit ad5421_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + + iio_device_unregister(indio_dev); + if (spi->irq) + free_irq(spi->irq, indio_dev); + iio_device_free(indio_dev); + + return 0; +} + +static struct spi_driver ad5421_driver = { + .driver = { + .name = "ad5421", + .owner = THIS_MODULE, + }, + .probe = ad5421_probe, + .remove = __devexit_p(ad5421_remove), +}; +module_spi_driver(ad5421_driver); + +MODULE_AUTHOR("Lars-Peter Clausen "); +MODULE_DESCRIPTION("Analog Devices AD5421 DAC"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("spi:ad5421"); diff --git a/drivers/iio/dac/ad5446.c b/drivers/iio/dac/ad5446.c new file mode 100644 index 000000000000..49f557fc673b --- /dev/null +++ b/drivers/iio/dac/ad5446.c @@ -0,0 +1,381 @@ +/* + * AD5446 SPI DAC driver + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "ad5446.h" + +static int ad5446_write(struct ad5446_state *st, unsigned val) +{ + __be16 data = cpu_to_be16(val); + return spi_write(st->spi, &data, sizeof(data)); +} + +static int ad5660_write(struct ad5446_state *st, unsigned val) +{ + uint8_t data[3]; + + data[0] = (val >> 16) & 0xFF; + data[1] = (val >> 8) & 0xFF; + data[2] = val & 0xFF; + + return spi_write(st->spi, data, sizeof(data)); +} + +static const char * const ad5446_powerdown_modes[] = { + "1kohm_to_gnd", "100kohm_to_gnd", "three_state" +}; + +static int ad5446_set_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int mode) +{ + struct ad5446_state *st = iio_priv(indio_dev); + + st->pwr_down_mode = mode + 1; + + return 0; +} + +static int ad5446_get_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad5446_state *st = iio_priv(indio_dev); + + return st->pwr_down_mode - 1; +} + +static const struct iio_enum ad5446_powerdown_mode_enum = { + .items = ad5446_powerdown_modes, + .num_items = ARRAY_SIZE(ad5446_powerdown_modes), + .get = ad5446_get_powerdown_mode, + .set = ad5446_set_powerdown_mode, +}; + +static ssize_t ad5446_read_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, + const struct iio_chan_spec *chan, + char *buf) +{ + struct ad5446_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", st->pwr_down); +} + +static ssize_t ad5446_write_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, size_t len) +{ + struct ad5446_state *st = iio_priv(indio_dev); + unsigned int shift; + unsigned int val; + bool powerdown; + int ret; + + ret = strtobool(buf, &powerdown); + if (ret) + return ret; + + mutex_lock(&indio_dev->mlock); + st->pwr_down = powerdown; + + if (st->pwr_down) { + shift = chan->scan_type.realbits + chan->scan_type.shift; + val = st->pwr_down_mode << shift; + } else { + val = st->cached_val; + } + + ret = st->chip_info->write(st, val); + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : len; +} + +static const struct iio_chan_spec_ext_info ad5064_ext_info_powerdown[] = { + { + .name = "powerdown", + .read = ad5446_read_dac_powerdown, + .write = ad5446_write_dac_powerdown, + }, + IIO_ENUM("powerdown_mode", false, &ad5446_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", &ad5446_powerdown_mode_enum), + { }, +}; + +#define _AD5446_CHANNEL(bits, storage, shift, ext) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = 0, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .scan_type = IIO_ST('u', (bits), (storage), (shift)), \ + .ext_info = (ext), \ +} + +#define AD5446_CHANNEL(bits, storage, shift) \ + _AD5446_CHANNEL(bits, storage, shift, NULL) + +#define AD5446_CHANNEL_POWERDOWN(bits, storage, shift) \ + _AD5446_CHANNEL(bits, storage, shift, ad5064_ext_info_powerdown) + +static const struct ad5446_chip_info ad5446_chip_info_tbl[] = { + [ID_AD5444] = { + .channel = AD5446_CHANNEL(12, 16, 2), + .write = ad5446_write, + }, + [ID_AD5446] = { + .channel = AD5446_CHANNEL(14, 16, 0), + .write = ad5446_write, + }, + [ID_AD5541A] = { + .channel = AD5446_CHANNEL(16, 16, 0), + .write = ad5446_write, + }, + [ID_AD5512A] = { + .channel = AD5446_CHANNEL(12, 16, 4), + .write = ad5446_write, + }, + [ID_AD5553] = { + .channel = AD5446_CHANNEL(14, 16, 0), + .write = ad5446_write, + }, + [ID_AD5601] = { + .channel = AD5446_CHANNEL_POWERDOWN(8, 16, 6), + .write = ad5446_write, + }, + [ID_AD5611] = { + .channel = AD5446_CHANNEL_POWERDOWN(10, 16, 4), + .write = ad5446_write, + }, + [ID_AD5621] = { + .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), + .write = ad5446_write, + }, + [ID_AD5620_2500] = { + .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), + .int_vref_mv = 2500, + .write = ad5446_write, + }, + [ID_AD5620_1250] = { + .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), + .int_vref_mv = 1250, + .write = ad5446_write, + }, + [ID_AD5640_2500] = { + .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0), + .int_vref_mv = 2500, + .write = ad5446_write, + }, + [ID_AD5640_1250] = { + .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0), + .int_vref_mv = 1250, + .write = ad5446_write, + }, + [ID_AD5660_2500] = { + .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), + .int_vref_mv = 2500, + .write = ad5660_write, + }, + [ID_AD5660_1250] = { + .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), + .int_vref_mv = 1250, + .write = ad5660_write, + }, + [ID_AD5662] = { + .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), + .write = ad5660_write, + }, +}; + +static int ad5446_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct ad5446_state *st = iio_priv(indio_dev); + unsigned long scale_uv; + + switch (m) { + case IIO_CHAN_INFO_RAW: + *val = st->cached_val; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; + *val = scale_uv / 1000; + *val2 = (scale_uv % 1000) * 1000; + return IIO_VAL_INT_PLUS_MICRO; + + } + return -EINVAL; +} + +static int ad5446_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct ad5446_state *st = iio_priv(indio_dev); + int ret = 0; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (val >= (1 << chan->scan_type.realbits) || val < 0) + return -EINVAL; + + val <<= chan->scan_type.shift; + mutex_lock(&indio_dev->mlock); + st->cached_val = val; + if (!st->pwr_down) + ret = st->chip_info->write(st, val); + mutex_unlock(&indio_dev->mlock); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static const struct iio_info ad5446_info = { + .read_raw = ad5446_read_raw, + .write_raw = ad5446_write_raw, + .driver_module = THIS_MODULE, +}; + +static int __devinit ad5446_probe(struct spi_device *spi) +{ + struct ad5446_state *st; + struct iio_dev *indio_dev; + struct regulator *reg; + int ret, voltage_uv = 0; + + reg = regulator_get(&spi->dev, "vcc"); + if (!IS_ERR(reg)) { + ret = regulator_enable(reg); + if (ret) + goto error_put_reg; + + voltage_uv = regulator_get_voltage(reg); + } + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_disable_reg; + } + st = iio_priv(indio_dev); + st->chip_info = + &ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data]; + + spi_set_drvdata(spi, indio_dev); + st->reg = reg; + st->spi = spi; + + /* Establish that the iio_dev is a child of the spi device */ + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->info = &ad5446_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = &st->chip_info->channel; + indio_dev->num_channels = 1; + + st->pwr_down_mode = MODE_PWRDWN_1k; + + if (st->chip_info->int_vref_mv) + st->vref_mv = st->chip_info->int_vref_mv; + else if (voltage_uv) + st->vref_mv = voltage_uv / 1000; + else + dev_warn(&spi->dev, "reference voltage unspecified\n"); + + ret = iio_device_register(indio_dev); + if (ret) + goto error_free_device; + + return 0; + +error_free_device: + iio_device_free(indio_dev); +error_disable_reg: + if (!IS_ERR(reg)) + regulator_disable(reg); +error_put_reg: + if (!IS_ERR(reg)) + regulator_put(reg); + + return ret; +} + +static int ad5446_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5446_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + if (!IS_ERR(st->reg)) { + regulator_disable(st->reg); + regulator_put(st->reg); + } + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5446_id[] = { + {"ad5444", ID_AD5444}, + {"ad5446", ID_AD5446}, + {"ad5512a", ID_AD5512A}, + {"ad5541a", ID_AD5541A}, + {"ad5542a", ID_AD5541A}, /* ad5541a and ad5542a are compatible */ + {"ad5543", ID_AD5541A}, /* ad5541a and ad5543 are compatible */ + {"ad5553", ID_AD5553}, + {"ad5601", ID_AD5601}, + {"ad5611", ID_AD5611}, + {"ad5621", ID_AD5621}, + {"ad5620-2500", ID_AD5620_2500}, /* AD5620/40/60: */ + {"ad5620-1250", ID_AD5620_1250}, /* part numbers may look differently */ + {"ad5640-2500", ID_AD5640_2500}, + {"ad5640-1250", ID_AD5640_1250}, + {"ad5660-2500", ID_AD5660_2500}, + {"ad5660-1250", ID_AD5660_1250}, + {"ad5662", ID_AD5662}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5446_id); + +static struct spi_driver ad5446_driver = { + .driver = { + .name = "ad5446", + .owner = THIS_MODULE, + }, + .probe = ad5446_probe, + .remove = __devexit_p(ad5446_remove), + .id_table = ad5446_id, +}; +module_spi_driver(ad5446_driver); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5446.h b/drivers/iio/dac/ad5446.h new file mode 100644 index 000000000000..dfd68ce7427e --- /dev/null +++ b/drivers/iio/dac/ad5446.h @@ -0,0 +1,89 @@ +/* + * AD5446 SPI DAC driver + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ +#ifndef IIO_DAC_AD5446_H_ +#define IIO_DAC_AD5446_H_ + +/* DAC Control Bits */ + +#define AD5446_LOAD (0x0 << 14) /* Load and update */ +#define AD5446_SDO_DIS (0x1 << 14) /* Disable SDO */ +#define AD5446_NOP (0x2 << 14) /* No operation */ +#define AD5446_CLK_RISING (0x3 << 14) /* Clock data on rising edge */ + +#define AD5620_LOAD (0x0 << 14) /* Load and update Norm Operation*/ +#define AD5620_PWRDWN_1k (0x1 << 14) /* Power-down: 1kOhm to GND */ +#define AD5620_PWRDWN_100k (0x2 << 14) /* Power-down: 100kOhm to GND */ +#define AD5620_PWRDWN_TRISTATE (0x3 << 14) /* Power-down: Three-state */ + +#define AD5660_LOAD (0x0 << 16) /* Load and update Norm Operation*/ +#define AD5660_PWRDWN_1k (0x1 << 16) /* Power-down: 1kOhm to GND */ +#define AD5660_PWRDWN_100k (0x2 << 16) /* Power-down: 100kOhm to GND */ +#define AD5660_PWRDWN_TRISTATE (0x3 << 16) /* Power-down: Three-state */ + +#define MODE_PWRDWN_1k 0x1 +#define MODE_PWRDWN_100k 0x2 +#define MODE_PWRDWN_TRISTATE 0x3 + +/** + * struct ad5446_state - driver instance specific data + * @spi: spi_device + * @chip_info: chip model specific constants, available modes etc + * @reg: supply regulator + * @vref_mv: actual reference voltage used + */ + +struct ad5446_state { + struct spi_device *spi; + const struct ad5446_chip_info *chip_info; + struct regulator *reg; + unsigned short vref_mv; + unsigned cached_val; + unsigned pwr_down_mode; + unsigned pwr_down; +}; + +/** + * struct ad5446_chip_info - chip specific information + * @channel: channel spec for the DAC + * @int_vref_mv: AD5620/40/60: the internal reference voltage + * @write: chip specific helper function to write to the register + */ + +struct ad5446_chip_info { + struct iio_chan_spec channel; + u16 int_vref_mv; + int (*write)(struct ad5446_state *st, unsigned val); +}; + +/** + * ad5446_supported_device_ids: + * The AD5620/40/60 parts are available in different fixed internal reference + * voltage options. The actual part numbers may look differently + * (and a bit cryptic), however this style is used to make clear which + * parts are supported here. + */ + +enum ad5446_supported_device_ids { + ID_AD5444, + ID_AD5446, + ID_AD5541A, + ID_AD5512A, + ID_AD5553, + ID_AD5601, + ID_AD5611, + ID_AD5621, + ID_AD5620_2500, + ID_AD5620_1250, + ID_AD5640_2500, + ID_AD5640_1250, + ID_AD5660_2500, + ID_AD5660_1250, + ID_AD5662, +}; + +#endif /* IIO_DAC_AD5446_H_ */ diff --git a/drivers/iio/dac/ad5504.c b/drivers/iio/dac/ad5504.c new file mode 100644 index 000000000000..242bdc7d0044 --- /dev/null +++ b/drivers/iio/dac/ad5504.c @@ -0,0 +1,393 @@ +/* + * AD5504, AD5501 High Voltage Digital to Analog Converter + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#define AD5505_BITS 12 +#define AD5504_RES_MASK ((1 << (AD5505_BITS)) - 1) + +#define AD5504_CMD_READ (1 << 15) +#define AD5504_CMD_WRITE (0 << 15) +#define AD5504_ADDR(addr) ((addr) << 12) + +/* Registers */ +#define AD5504_ADDR_NOOP 0 +#define AD5504_ADDR_DAC(x) ((x) + 1) +#define AD5504_ADDR_ALL_DAC 5 +#define AD5504_ADDR_CTRL 7 + +/* Control Register */ +#define AD5504_DAC_PWR(ch) ((ch) << 2) +#define AD5504_DAC_PWRDWN_MODE(mode) ((mode) << 6) +#define AD5504_DAC_PWRDN_20K 0 +#define AD5504_DAC_PWRDN_3STATE 1 + +/** + * struct ad5446_state - driver instance specific data + * @us: spi_device + * @reg: supply regulator + * @vref_mv: actual reference voltage used + * @pwr_down_mask power down mask + * @pwr_down_mode current power down mode + */ + +struct ad5504_state { + struct spi_device *spi; + struct regulator *reg; + unsigned short vref_mv; + unsigned pwr_down_mask; + unsigned pwr_down_mode; +}; + +/** + * ad5504_supported_device_ids: + */ + +enum ad5504_supported_device_ids { + ID_AD5504, + ID_AD5501, +}; + +static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val) +{ + u16 tmp = cpu_to_be16(AD5504_CMD_WRITE | + AD5504_ADDR(addr) | + (val & AD5504_RES_MASK)); + + return spi_write(spi, (u8 *)&tmp, 2); +} + +static int ad5504_spi_read(struct spi_device *spi, u8 addr) +{ + u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr)); + u16 val; + int ret; + struct spi_transfer t = { + .tx_buf = &tmp, + .rx_buf = &val, + .len = 2, + }; + struct spi_message m; + + spi_message_init(&m); + spi_message_add_tail(&t, &m); + ret = spi_sync(spi, &m); + + if (ret < 0) + return ret; + + return be16_to_cpu(val) & AD5504_RES_MASK; +} + +static int ad5504_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct ad5504_state *st = iio_priv(indio_dev); + unsigned long scale_uv; + int ret; + + switch (m) { + case IIO_CHAN_INFO_RAW: + ret = ad5504_spi_read(st->spi, chan->address); + if (ret < 0) + return ret; + + *val = ret; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; + *val = scale_uv / 1000; + *val2 = (scale_uv % 1000) * 1000; + return IIO_VAL_INT_PLUS_MICRO; + + } + return -EINVAL; +} + +static int ad5504_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct ad5504_state *st = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (val >= (1 << chan->scan_type.realbits) || val < 0) + return -EINVAL; + + return ad5504_spi_write(st->spi, chan->address, val); + default: + ret = -EINVAL; + } + + return -EINVAL; +} + +static const char * const ad5504_powerdown_modes[] = { + "20kohm_to_gnd", + "three_state", +}; + +static int ad5504_get_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad5504_state *st = iio_priv(indio_dev); + + return st->pwr_down_mode; +} + +static int ad5504_set_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int mode) +{ + struct ad5504_state *st = iio_priv(indio_dev); + + st->pwr_down_mode = mode; + + return 0; +} + +static const struct iio_enum ad5504_powerdown_mode_enum = { + .items = ad5504_powerdown_modes, + .num_items = ARRAY_SIZE(ad5504_powerdown_modes), + .get = ad5504_get_powerdown_mode, + .set = ad5504_set_powerdown_mode, +}; + +static ssize_t ad5504_read_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, char *buf) +{ + struct ad5504_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", + !(st->pwr_down_mask & (1 << chan->channel))); +} + +static ssize_t ad5504_write_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, const char *buf, + size_t len) +{ + bool pwr_down; + int ret; + struct ad5504_state *st = iio_priv(indio_dev); + + ret = strtobool(buf, &pwr_down); + if (ret) + return ret; + + if (pwr_down) + st->pwr_down_mask |= (1 << chan->channel); + else + st->pwr_down_mask &= ~(1 << chan->channel); + + ret = ad5504_spi_write(st->spi, AD5504_ADDR_CTRL, + AD5504_DAC_PWRDWN_MODE(st->pwr_down_mode) | + AD5504_DAC_PWR(st->pwr_down_mask)); + + /* writes to the CTRL register must be followed by a NOOP */ + ad5504_spi_write(st->spi, AD5504_ADDR_NOOP, 0); + + return ret ? ret : len; +} + +static IIO_CONST_ATTR(temp0_thresh_rising_value, "110000"); +static IIO_CONST_ATTR(temp0_thresh_rising_en, "1"); + +static struct attribute *ad5504_ev_attributes[] = { + &iio_const_attr_temp0_thresh_rising_value.dev_attr.attr, + &iio_const_attr_temp0_thresh_rising_en.dev_attr.attr, + NULL, +}; + +static struct attribute_group ad5504_ev_attribute_group = { + .attrs = ad5504_ev_attributes, + .name = "events", +}; + +static irqreturn_t ad5504_event_handler(int irq, void *private) +{ + iio_push_event(private, + IIO_UNMOD_EVENT_CODE(IIO_TEMP, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + iio_get_time_ns()); + + return IRQ_HANDLED; +} + +static const struct iio_info ad5504_info = { + .write_raw = ad5504_write_raw, + .read_raw = ad5504_read_raw, + .event_attrs = &ad5504_ev_attribute_group, + .driver_module = THIS_MODULE, +}; + +static const struct iio_chan_spec_ext_info ad5504_ext_info[] = { + { + .name = "powerdown", + .read = ad5504_read_dac_powerdown, + .write = ad5504_write_dac_powerdown, + }, + IIO_ENUM("powerdown_mode", true, &ad5504_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", &ad5504_powerdown_mode_enum), + { }, +}; + +#define AD5504_CHANNEL(_chan) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (_chan), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .address = AD5504_ADDR_DAC(_chan), \ + .scan_type = IIO_ST('u', 12, 16, 0), \ + .ext_info = ad5504_ext_info, \ +} + +static const struct iio_chan_spec ad5504_channels[] = { + AD5504_CHANNEL(0), + AD5504_CHANNEL(1), + AD5504_CHANNEL(2), + AD5504_CHANNEL(3), +}; + +static int __devinit ad5504_probe(struct spi_device *spi) +{ + struct ad5504_platform_data *pdata = spi->dev.platform_data; + struct iio_dev *indio_dev; + struct ad5504_state *st; + struct regulator *reg; + int ret, voltage_uv = 0; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + reg = regulator_get(&spi->dev, "vcc"); + if (!IS_ERR(reg)) { + ret = regulator_enable(reg); + if (ret) + goto error_put_reg; + + voltage_uv = regulator_get_voltage(reg); + } + + spi_set_drvdata(spi, indio_dev); + st = iio_priv(indio_dev); + if (voltage_uv) + st->vref_mv = voltage_uv / 1000; + else if (pdata) + st->vref_mv = pdata->vref_mv; + else + dev_warn(&spi->dev, "reference voltage unspecified\n"); + + st->reg = reg; + st->spi = spi; + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(st->spi)->name; + indio_dev->info = &ad5504_info; + if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) + indio_dev->num_channels = 1; + else + indio_dev->num_channels = 4; + indio_dev->channels = ad5504_channels; + indio_dev->modes = INDIO_DIRECT_MODE; + + if (spi->irq) { + ret = request_threaded_irq(spi->irq, + NULL, + &ad5504_event_handler, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + spi_get_device_id(st->spi)->name, + indio_dev); + if (ret) + goto error_disable_reg; + } + + ret = iio_device_register(indio_dev); + if (ret) + goto error_free_irq; + + return 0; + +error_free_irq: + if (spi->irq) + free_irq(spi->irq, indio_dev); +error_disable_reg: + if (!IS_ERR(reg)) + regulator_disable(reg); +error_put_reg: + if (!IS_ERR(reg)) + regulator_put(reg); + + iio_device_free(indio_dev); +error_ret: + return ret; +} + +static int __devexit ad5504_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5504_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + if (spi->irq) + free_irq(spi->irq, indio_dev); + + if (!IS_ERR(st->reg)) { + regulator_disable(st->reg); + regulator_put(st->reg); + } + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5504_id[] = { + {"ad5504", ID_AD5504}, + {"ad5501", ID_AD5501}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5504_id); + +static struct spi_driver ad5504_driver = { + .driver = { + .name = "ad5504", + .owner = THIS_MODULE, + }, + .probe = ad5504_probe, + .remove = __devexit_p(ad5504_remove), + .id_table = ad5504_id, +}; +module_spi_driver(ad5504_driver); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Analog Devices AD5501/AD5501 DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5624r.h b/drivers/iio/dac/ad5624r.h new file mode 100644 index 000000000000..5dca3028cdfd --- /dev/null +++ b/drivers/iio/dac/ad5624r.h @@ -0,0 +1,79 @@ +/* + * AD5624R SPI DAC driver + * + * Copyright 2010-2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ +#ifndef SPI_AD5624R_H_ +#define SPI_AD5624R_H_ + +#define AD5624R_DAC_CHANNELS 4 + +#define AD5624R_ADDR_DAC0 0x0 +#define AD5624R_ADDR_DAC1 0x1 +#define AD5624R_ADDR_DAC2 0x2 +#define AD5624R_ADDR_DAC3 0x3 +#define AD5624R_ADDR_ALL_DAC 0x7 + +#define AD5624R_CMD_WRITE_INPUT_N 0x0 +#define AD5624R_CMD_UPDATE_DAC_N 0x1 +#define AD5624R_CMD_WRITE_INPUT_N_UPDATE_ALL 0x2 +#define AD5624R_CMD_WRITE_INPUT_N_UPDATE_N 0x3 +#define AD5624R_CMD_POWERDOWN_DAC 0x4 +#define AD5624R_CMD_RESET 0x5 +#define AD5624R_CMD_LDAC_SETUP 0x6 +#define AD5624R_CMD_INTERNAL_REFER_SETUP 0x7 + +#define AD5624R_LDAC_PWRDN_NONE 0x0 +#define AD5624R_LDAC_PWRDN_1K 0x1 +#define AD5624R_LDAC_PWRDN_100K 0x2 +#define AD5624R_LDAC_PWRDN_3STATE 0x3 + +/** + * struct ad5624r_chip_info - chip specific information + * @channels: channel spec for the DAC + * @int_vref_mv: AD5620/40/60: the internal reference voltage + */ + +struct ad5624r_chip_info { + const struct iio_chan_spec *channels; + u16 int_vref_mv; +}; + +/** + * struct ad5446_state - driver instance specific data + * @indio_dev: the industrial I/O device + * @us: spi_device + * @chip_info: chip model specific constants, available modes etc + * @reg: supply regulator + * @vref_mv: actual reference voltage used + * @pwr_down_mask power down mask + * @pwr_down_mode current power down mode + */ + +struct ad5624r_state { + struct spi_device *us; + const struct ad5624r_chip_info *chip_info; + struct regulator *reg; + unsigned short vref_mv; + unsigned pwr_down_mask; + unsigned pwr_down_mode; +}; + +/** + * ad5624r_supported_device_ids: + * The AD5624/44/64 parts are available in different + * fixed internal reference voltage options. + */ + +enum ad5624r_supported_device_ids { + ID_AD5624R3, + ID_AD5644R3, + ID_AD5664R3, + ID_AD5624R5, + ID_AD5644R5, + ID_AD5664R5, +}; + +#endif /* SPI_AD5624R_H_ */ diff --git a/drivers/iio/dac/ad5624r_spi.c b/drivers/iio/dac/ad5624r_spi.c new file mode 100644 index 000000000000..6a7d6a48cc6d --- /dev/null +++ b/drivers/iio/dac/ad5624r_spi.c @@ -0,0 +1,324 @@ +/* + * AD5624R, AD5644R, AD5664R Digital to analog convertors spi driver + * + * Copyright 2010-2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "ad5624r.h" + +static int ad5624r_spi_write(struct spi_device *spi, + u8 cmd, u8 addr, u16 val, u8 len) +{ + u32 data; + u8 msg[3]; + + /* + * The input shift register is 24 bits wide. The first two bits are + * don't care bits. The next three are the command bits, C2 to C0, + * followed by the 3-bit DAC address, A2 to A0, and then the + * 16-, 14-, 12-bit data-word. The data-word comprises the 16-, + * 14-, 12-bit input code followed by 0, 2, or 4 don't care bits, + * for the AD5664R, AD5644R, and AD5624R, respectively. + */ + data = (0 << 22) | (cmd << 19) | (addr << 16) | (val << (16 - len)); + msg[0] = data >> 16; + msg[1] = data >> 8; + msg[2] = data; + + return spi_write(spi, msg, 3); +} + +static int ad5624r_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct ad5624r_state *st = iio_priv(indio_dev); + unsigned long scale_uv; + + switch (m) { + case IIO_CHAN_INFO_SCALE: + scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; + *val = scale_uv / 1000; + *val2 = (scale_uv % 1000) * 1000; + return IIO_VAL_INT_PLUS_MICRO; + + } + return -EINVAL; +} + +static int ad5624r_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct ad5624r_state *st = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (val >= (1 << chan->scan_type.realbits) || val < 0) + return -EINVAL; + + return ad5624r_spi_write(st->us, + AD5624R_CMD_WRITE_INPUT_N_UPDATE_N, + chan->address, val, + chan->scan_type.shift); + default: + ret = -EINVAL; + } + + return -EINVAL; +} + +static const char * const ad5624r_powerdown_modes[] = { + "1kohm_to_gnd", + "100kohm_to_gnd", + "three_state" +}; + +static int ad5624r_get_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad5624r_state *st = iio_priv(indio_dev); + + return st->pwr_down_mode; +} + +static int ad5624r_set_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int mode) +{ + struct ad5624r_state *st = iio_priv(indio_dev); + + st->pwr_down_mode = mode; + + return 0; +} + +static const struct iio_enum ad5624r_powerdown_mode_enum = { + .items = ad5624r_powerdown_modes, + .num_items = ARRAY_SIZE(ad5624r_powerdown_modes), + .get = ad5624r_get_powerdown_mode, + .set = ad5624r_set_powerdown_mode, +}; + +static ssize_t ad5624r_read_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, char *buf) +{ + struct ad5624r_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", + !!(st->pwr_down_mask & (1 << chan->channel))); +} + +static ssize_t ad5624r_write_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, const char *buf, + size_t len) +{ + bool pwr_down; + int ret; + struct ad5624r_state *st = iio_priv(indio_dev); + + ret = strtobool(buf, &pwr_down); + if (ret) + return ret; + + if (pwr_down) + st->pwr_down_mask |= (1 << chan->channel); + else + st->pwr_down_mask &= ~(1 << chan->channel); + + ret = ad5624r_spi_write(st->us, AD5624R_CMD_POWERDOWN_DAC, 0, + (st->pwr_down_mode << 4) | + st->pwr_down_mask, 16); + + return ret ? ret : len; +} + +static const struct iio_info ad5624r_info = { + .write_raw = ad5624r_write_raw, + .read_raw = ad5624r_read_raw, + .driver_module = THIS_MODULE, +}; + +static const struct iio_chan_spec_ext_info ad5624r_ext_info[] = { + { + .name = "powerdown", + .read = ad5624r_read_dac_powerdown, + .write = ad5624r_write_dac_powerdown, + }, + IIO_ENUM("powerdown_mode", true, &ad5624r_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", &ad5624r_powerdown_mode_enum), + { }, +}; + +#define AD5624R_CHANNEL(_chan, _bits) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (_chan), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .address = (_chan), \ + .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \ + .ext_info = ad5624r_ext_info, \ +} + +#define DECLARE_AD5624R_CHANNELS(_name, _bits) \ + const struct iio_chan_spec _name##_channels[] = { \ + AD5624R_CHANNEL(0, _bits), \ + AD5624R_CHANNEL(1, _bits), \ + AD5624R_CHANNEL(2, _bits), \ + AD5624R_CHANNEL(3, _bits), \ +} + +static DECLARE_AD5624R_CHANNELS(ad5624r, 12); +static DECLARE_AD5624R_CHANNELS(ad5644r, 14); +static DECLARE_AD5624R_CHANNELS(ad5664r, 16); + +static const struct ad5624r_chip_info ad5624r_chip_info_tbl[] = { + [ID_AD5624R3] = { + .channels = ad5624r_channels, + .int_vref_mv = 1250, + }, + [ID_AD5624R5] = { + .channels = ad5624r_channels, + .int_vref_mv = 2500, + }, + [ID_AD5644R3] = { + .channels = ad5644r_channels, + .int_vref_mv = 1250, + }, + [ID_AD5644R5] = { + .channels = ad5644r_channels, + .int_vref_mv = 2500, + }, + [ID_AD5664R3] = { + .channels = ad5664r_channels, + .int_vref_mv = 1250, + }, + [ID_AD5664R5] = { + .channels = ad5664r_channels, + .int_vref_mv = 2500, + }, +}; + +static int __devinit ad5624r_probe(struct spi_device *spi) +{ + struct ad5624r_state *st; + struct iio_dev *indio_dev; + int ret, voltage_uv = 0; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + st = iio_priv(indio_dev); + st->reg = regulator_get(&spi->dev, "vcc"); + if (!IS_ERR(st->reg)) { + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + + voltage_uv = regulator_get_voltage(st->reg); + } + + spi_set_drvdata(spi, indio_dev); + st->chip_info = + &ad5624r_chip_info_tbl[spi_get_device_id(spi)->driver_data]; + + if (voltage_uv) + st->vref_mv = voltage_uv / 1000; + else + st->vref_mv = st->chip_info->int_vref_mv; + + st->us = spi; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->info = &ad5624r_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = AD5624R_DAC_CHANNELS; + + ret = ad5624r_spi_write(spi, AD5624R_CMD_INTERNAL_REFER_SETUP, 0, + !!voltage_uv, 16); + if (ret) + goto error_disable_reg; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_disable_reg; + + return 0; + +error_disable_reg: + if (!IS_ERR(st->reg)) + regulator_disable(st->reg); +error_put_reg: + if (!IS_ERR(st->reg)) + regulator_put(st->reg); + iio_device_free(indio_dev); +error_ret: + + return ret; +} + +static int __devexit ad5624r_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5624r_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + if (!IS_ERR(st->reg)) { + regulator_disable(st->reg); + regulator_put(st->reg); + } + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5624r_id[] = { + {"ad5624r3", ID_AD5624R3}, + {"ad5644r3", ID_AD5644R3}, + {"ad5664r3", ID_AD5664R3}, + {"ad5624r5", ID_AD5624R5}, + {"ad5644r5", ID_AD5644R5}, + {"ad5664r5", ID_AD5664R5}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5624r_id); + +static struct spi_driver ad5624r_driver = { + .driver = { + .name = "ad5624r", + .owner = THIS_MODULE, + }, + .probe = ad5624r_probe, + .remove = __devexit_p(ad5624r_remove), + .id_table = ad5624r_id, +}; +module_spi_driver(ad5624r_driver); + +MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); +MODULE_DESCRIPTION("Analog Devices AD5624/44/64R DAC spi driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c new file mode 100644 index 000000000000..6948d75e1036 --- /dev/null +++ b/drivers/iio/dac/ad5686.c @@ -0,0 +1,418 @@ +/* + * AD5686R, AD5685R, AD5684R Digital to analog converters driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define AD5686_DAC_CHANNELS 4 + +#define AD5686_ADDR(x) ((x) << 16) +#define AD5686_CMD(x) ((x) << 20) + +#define AD5686_ADDR_DAC(chan) (0x1 << (chan)) +#define AD5686_ADDR_ALL_DAC 0xF + +#define AD5686_CMD_NOOP 0x0 +#define AD5686_CMD_WRITE_INPUT_N 0x1 +#define AD5686_CMD_UPDATE_DAC_N 0x2 +#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3 +#define AD5686_CMD_POWERDOWN_DAC 0x4 +#define AD5686_CMD_LDAC_MASK 0x5 +#define AD5686_CMD_RESET 0x6 +#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7 +#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8 +#define AD5686_CMD_READBACK_ENABLE 0x9 + +#define AD5686_LDAC_PWRDN_NONE 0x0 +#define AD5686_LDAC_PWRDN_1K 0x1 +#define AD5686_LDAC_PWRDN_100K 0x2 +#define AD5686_LDAC_PWRDN_3STATE 0x3 + +/** + * struct ad5686_chip_info - chip specific information + * @int_vref_mv: AD5620/40/60: the internal reference voltage + * @channel: channel specification +*/ + +struct ad5686_chip_info { + u16 int_vref_mv; + struct iio_chan_spec channel[AD5686_DAC_CHANNELS]; +}; + +/** + * struct ad5446_state - driver instance specific data + * @spi: spi_device + * @chip_info: chip model specific constants, available modes etc + * @reg: supply regulator + * @vref_mv: actual reference voltage used + * @pwr_down_mask: power down mask + * @pwr_down_mode: current power down mode + * @data: spi transfer buffers + */ + +struct ad5686_state { + struct spi_device *spi; + const struct ad5686_chip_info *chip_info; + struct regulator *reg; + unsigned short vref_mv; + unsigned pwr_down_mask; + unsigned pwr_down_mode; + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + + union { + u32 d32; + u8 d8[4]; + } data[3] ____cacheline_aligned; +}; + +/** + * ad5686_supported_device_ids: + */ + +enum ad5686_supported_device_ids { + ID_AD5684, + ID_AD5685, + ID_AD5686, +}; +static int ad5686_spi_write(struct ad5686_state *st, + u8 cmd, u8 addr, u16 val, u8 shift) +{ + val <<= shift; + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | + AD5686_ADDR(addr) | + val); + + return spi_write(st->spi, &st->data[0].d8[1], 3); +} + +static int ad5686_spi_read(struct ad5686_state *st, u8 addr) +{ + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0].d8[1], + .len = 3, + .cs_change = 1, + }, { + .tx_buf = &st->data[1].d8[1], + .rx_buf = &st->data[2].d8[1], + .len = 3, + }, + }; + struct spi_message m; + int ret; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) | + AD5686_ADDR(addr)); + st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); + + ret = spi_sync(st->spi, &m); + if (ret < 0) + return ret; + + return be32_to_cpu(st->data[2].d32); +} + +static const char * const ad5686_powerdown_modes[] = { + "1kohm_to_gnd", + "100kohm_to_gnd", + "three_state" +}; + +static int ad5686_get_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad5686_state *st = iio_priv(indio_dev); + + return ((st->pwr_down_mode >> (chan->channel * 2)) & 0x3) - 1; +} + +static int ad5686_set_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int mode) +{ + struct ad5686_state *st = iio_priv(indio_dev); + + st->pwr_down_mode &= ~(0x3 << (chan->channel * 2)); + st->pwr_down_mode |= ((mode + 1) << (chan->channel * 2)); + + return 0; +} + +static const struct iio_enum ad5686_powerdown_mode_enum = { + .items = ad5686_powerdown_modes, + .num_items = ARRAY_SIZE(ad5686_powerdown_modes), + .get = ad5686_get_powerdown_mode, + .set = ad5686_set_powerdown_mode, +}; + +static ssize_t ad5686_read_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, char *buf) +{ + struct ad5686_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", !!(st->pwr_down_mask & + (0x3 << (chan->channel * 2)))); +} + +static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, const char *buf, + size_t len) +{ + bool readin; + int ret; + struct ad5686_state *st = iio_priv(indio_dev); + + ret = strtobool(buf, &readin); + if (ret) + return ret; + + if (readin == true) + st->pwr_down_mask |= (0x3 << (chan->channel * 2)); + else + st->pwr_down_mask &= ~(0x3 << (chan->channel * 2)); + + ret = ad5686_spi_write(st, AD5686_CMD_POWERDOWN_DAC, 0, + st->pwr_down_mask & st->pwr_down_mode, 0); + + return ret ? ret : len; +} + +static int ad5686_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct ad5686_state *st = iio_priv(indio_dev); + unsigned long scale_uv; + int ret; + + switch (m) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&indio_dev->mlock); + ret = ad5686_spi_read(st, chan->address); + mutex_unlock(&indio_dev->mlock); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SCALE: + scale_uv = (st->vref_mv * 100000) + >> (chan->scan_type.realbits); + *val = scale_uv / 100000; + *val2 = (scale_uv % 100000) * 10; + return IIO_VAL_INT_PLUS_MICRO; + + } + return -EINVAL; +} + +static int ad5686_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct ad5686_state *st = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (val > (1 << chan->scan_type.realbits) || val < 0) + return -EINVAL; + + mutex_lock(&indio_dev->mlock); + ret = ad5686_spi_write(st, + AD5686_CMD_WRITE_INPUT_N_UPDATE_N, + chan->address, + val, + chan->scan_type.shift); + mutex_unlock(&indio_dev->mlock); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static const struct iio_info ad5686_info = { + .read_raw = ad5686_read_raw, + .write_raw = ad5686_write_raw, + .driver_module = THIS_MODULE, +}; + +static const struct iio_chan_spec_ext_info ad5686_ext_info[] = { + { + .name = "powerdown", + .read = ad5686_read_dac_powerdown, + .write = ad5686_write_dac_powerdown, + }, + IIO_ENUM("powerdown_mode", false, &ad5686_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", &ad5686_powerdown_mode_enum), + { }, +}; + +#define AD5868_CHANNEL(chan, bits, shift) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = chan, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .address = AD5686_ADDR_DAC(chan), \ + .scan_type = IIO_ST('u', bits, 16, shift), \ + .ext_info = ad5686_ext_info, \ +} + +static const struct ad5686_chip_info ad5686_chip_info_tbl[] = { + [ID_AD5684] = { + .channel[0] = AD5868_CHANNEL(0, 12, 4), + .channel[1] = AD5868_CHANNEL(1, 12, 4), + .channel[2] = AD5868_CHANNEL(2, 12, 4), + .channel[3] = AD5868_CHANNEL(3, 12, 4), + .int_vref_mv = 2500, + }, + [ID_AD5685] = { + .channel[0] = AD5868_CHANNEL(0, 14, 2), + .channel[1] = AD5868_CHANNEL(1, 14, 2), + .channel[2] = AD5868_CHANNEL(2, 14, 2), + .channel[3] = AD5868_CHANNEL(3, 14, 2), + .int_vref_mv = 2500, + }, + [ID_AD5686] = { + .channel[0] = AD5868_CHANNEL(0, 16, 0), + .channel[1] = AD5868_CHANNEL(1, 16, 0), + .channel[2] = AD5868_CHANNEL(2, 16, 0), + .channel[3] = AD5868_CHANNEL(3, 16, 0), + .int_vref_mv = 2500, + }, +}; + + +static int __devinit ad5686_probe(struct spi_device *spi) +{ + struct ad5686_state *st; + struct iio_dev *indio_dev; + int ret, regdone = 0, voltage_uv = 0; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->reg = regulator_get(&spi->dev, "vcc"); + if (!IS_ERR(st->reg)) { + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + + voltage_uv = regulator_get_voltage(st->reg); + } + + st->chip_info = + &ad5686_chip_info_tbl[spi_get_device_id(spi)->driver_data]; + + if (voltage_uv) + st->vref_mv = voltage_uv / 1000; + else + st->vref_mv = st->chip_info->int_vref_mv; + + st->spi = spi; + + /* Set all the power down mode for all channels to 1K pulldown */ + st->pwr_down_mode = 0x55; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->info = &ad5686_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = st->chip_info->channel; + indio_dev->num_channels = AD5686_DAC_CHANNELS; + + regdone = 1; + ret = ad5686_spi_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0, + !!voltage_uv, 0); + if (ret) + goto error_disable_reg; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_disable_reg; + + return 0; + +error_disable_reg: + if (!IS_ERR(st->reg)) + regulator_disable(st->reg); +error_put_reg: + if (!IS_ERR(st->reg)) + regulator_put(st->reg); + + iio_device_free(indio_dev); + + return ret; +} + +static int __devexit ad5686_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5686_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + if (!IS_ERR(st->reg)) { + regulator_disable(st->reg); + regulator_put(st->reg); + } + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5686_id[] = { + {"ad5684", ID_AD5684}, + {"ad5685", ID_AD5685}, + {"ad5686", ID_AD5686}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5686_id); + +static struct spi_driver ad5686_driver = { + .driver = { + .name = "ad5686", + .owner = THIS_MODULE, + }, + .probe = ad5686_probe, + .remove = __devexit_p(ad5686_remove), + .id_table = ad5686_id, +}; +module_spi_driver(ad5686_driver); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5764.c b/drivers/iio/dac/ad5764.c new file mode 100644 index 000000000000..ffce30447445 --- /dev/null +++ b/drivers/iio/dac/ad5764.c @@ -0,0 +1,382 @@ +/* + * Analog devices AD5764, AD5764R, AD5744, AD5744R quad-channel + * Digital to Analog Converters driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define AD5764_REG_SF_NOP 0x0 +#define AD5764_REG_SF_CONFIG 0x1 +#define AD5764_REG_SF_CLEAR 0x4 +#define AD5764_REG_SF_LOAD 0x5 +#define AD5764_REG_DATA(x) ((2 << 3) | (x)) +#define AD5764_REG_COARSE_GAIN(x) ((3 << 3) | (x)) +#define AD5764_REG_FINE_GAIN(x) ((4 << 3) | (x)) +#define AD5764_REG_OFFSET(x) ((5 << 3) | (x)) + +#define AD5764_NUM_CHANNELS 4 + +/** + * struct ad5764_chip_info - chip specific information + * @int_vref: Value of the internal reference voltage in uV - 0 if external + * reference voltage is used + * @channel channel specification +*/ + +struct ad5764_chip_info { + unsigned long int_vref; + const struct iio_chan_spec *channels; +}; + +/** + * struct ad5764_state - driver instance specific data + * @spi: spi_device + * @chip_info: chip info + * @vref_reg: vref supply regulators + * @data: spi transfer buffers + */ + +struct ad5764_state { + struct spi_device *spi; + const struct ad5764_chip_info *chip_info; + struct regulator_bulk_data vref_reg[2]; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + union { + __be32 d32; + u8 d8[4]; + } data[2] ____cacheline_aligned; +}; + +enum ad5764_type { + ID_AD5744, + ID_AD5744R, + ID_AD5764, + ID_AD5764R, +}; + +#define AD5764_CHANNEL(_chan, _bits) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (_chan), \ + .address = (_chan), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_OFFSET_SHARED_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ + .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)) \ +} + +#define DECLARE_AD5764_CHANNELS(_name, _bits) \ +const struct iio_chan_spec _name##_channels[] = { \ + AD5764_CHANNEL(0, (_bits)), \ + AD5764_CHANNEL(1, (_bits)), \ + AD5764_CHANNEL(2, (_bits)), \ + AD5764_CHANNEL(3, (_bits)), \ +}; + +static DECLARE_AD5764_CHANNELS(ad5764, 16); +static DECLARE_AD5764_CHANNELS(ad5744, 14); + +static const struct ad5764_chip_info ad5764_chip_infos[] = { + [ID_AD5744] = { + .int_vref = 0, + .channels = ad5744_channels, + }, + [ID_AD5744R] = { + .int_vref = 5000000, + .channels = ad5744_channels, + }, + [ID_AD5764] = { + .int_vref = 0, + .channels = ad5764_channels, + }, + [ID_AD5764R] = { + .int_vref = 5000000, + .channels = ad5764_channels, + }, +}; + +static int ad5764_write(struct iio_dev *indio_dev, unsigned int reg, + unsigned int val) +{ + struct ad5764_state *st = iio_priv(indio_dev); + int ret; + + mutex_lock(&indio_dev->mlock); + st->data[0].d32 = cpu_to_be32((reg << 16) | val); + + ret = spi_write(st->spi, &st->data[0].d8[1], 3); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5764_read(struct iio_dev *indio_dev, unsigned int reg, + unsigned int *val) +{ + struct ad5764_state *st = iio_priv(indio_dev); + struct spi_message m; + int ret; + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0].d8[1], + .len = 3, + .cs_change = 1, + }, { + .rx_buf = &st->data[1].d8[1], + .len = 3, + }, + }; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + mutex_lock(&indio_dev->mlock); + + st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16)); + + ret = spi_sync(st->spi, &m); + if (ret >= 0) + *val = be32_to_cpu(st->data[1].d32) & 0xffff; + + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5764_chan_info_to_reg(struct iio_chan_spec const *chan, long info) +{ + switch (info) { + case 0: + return AD5764_REG_DATA(chan->address); + case IIO_CHAN_INFO_CALIBBIAS: + return AD5764_REG_OFFSET(chan->address); + case IIO_CHAN_INFO_CALIBSCALE: + return AD5764_REG_FINE_GAIN(chan->address); + default: + break; + } + + return 0; +} + +static int ad5764_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long info) +{ + const int max_val = (1 << chan->scan_type.realbits); + unsigned int reg; + + switch (info) { + case IIO_CHAN_INFO_RAW: + if (val >= max_val || val < 0) + return -EINVAL; + val <<= chan->scan_type.shift; + break; + case IIO_CHAN_INFO_CALIBBIAS: + if (val >= 128 || val < -128) + return -EINVAL; + break; + case IIO_CHAN_INFO_CALIBSCALE: + if (val >= 32 || val < -32) + return -EINVAL; + break; + default: + return -EINVAL; + } + + reg = ad5764_chan_info_to_reg(chan, info); + return ad5764_write(indio_dev, reg, (u16)val); +} + +static int ad5764_get_channel_vref(struct ad5764_state *st, + unsigned int channel) +{ + if (st->chip_info->int_vref) + return st->chip_info->int_vref; + else + return regulator_get_voltage(st->vref_reg[channel / 2].consumer); +} + +static int ad5764_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long info) +{ + struct ad5764_state *st = iio_priv(indio_dev); + unsigned long scale_uv; + unsigned int reg; + int vref; + int ret; + + switch (info) { + case IIO_CHAN_INFO_RAW: + reg = AD5764_REG_DATA(chan->address); + ret = ad5764_read(indio_dev, reg, val); + if (ret < 0) + return ret; + *val >>= chan->scan_type.shift; + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBBIAS: + reg = AD5764_REG_OFFSET(chan->address); + ret = ad5764_read(indio_dev, reg, val); + if (ret < 0) + return ret; + *val = sign_extend32(*val, 7); + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBSCALE: + reg = AD5764_REG_FINE_GAIN(chan->address); + ret = ad5764_read(indio_dev, reg, val); + if (ret < 0) + return ret; + *val = sign_extend32(*val, 5); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + /* vout = 4 * vref + ((dac_code / 65535) - 0.5) */ + vref = ad5764_get_channel_vref(st, chan->channel); + if (vref < 0) + return vref; + + scale_uv = (vref * 4 * 100) >> chan->scan_type.realbits; + *val = scale_uv / 100000; + *val2 = (scale_uv % 100000) * 10; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_OFFSET: + *val = -(1 << chan->scan_type.realbits) / 2; + return IIO_VAL_INT; + } + + return -EINVAL; +} + +static const struct iio_info ad5764_info = { + .read_raw = ad5764_read_raw, + .write_raw = ad5764_write_raw, + .driver_module = THIS_MODULE, +}; + +static int __devinit ad5764_probe(struct spi_device *spi) +{ + enum ad5764_type type = spi_get_device_id(spi)->driver_data; + struct iio_dev *indio_dev; + struct ad5764_state *st; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + dev_err(&spi->dev, "Failed to allocate iio device\n"); + return -ENOMEM; + } + + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->spi = spi; + st->chip_info = &ad5764_chip_infos[type]; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->info = &ad5764_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->num_channels = AD5764_NUM_CHANNELS; + indio_dev->channels = st->chip_info->channels; + + if (st->chip_info->int_vref == 0) { + st->vref_reg[0].supply = "vrefAB"; + st->vref_reg[1].supply = "vrefCD"; + + ret = regulator_bulk_get(&st->spi->dev, + ARRAY_SIZE(st->vref_reg), st->vref_reg); + if (ret) { + dev_err(&spi->dev, "Failed to request vref regulators: %d\n", + ret); + goto error_free; + } + + ret = regulator_bulk_enable(ARRAY_SIZE(st->vref_reg), + st->vref_reg); + if (ret) { + dev_err(&spi->dev, "Failed to enable vref regulators: %d\n", + ret); + goto error_free_reg; + } + } + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&spi->dev, "Failed to register iio device: %d\n", ret); + goto error_disable_reg; + } + + return 0; + +error_disable_reg: + if (st->chip_info->int_vref == 0) + regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg); +error_free_reg: + if (st->chip_info->int_vref == 0) + regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg); +error_free: + iio_device_free(indio_dev); + + return ret; +} + +static int __devexit ad5764_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5764_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + if (st->chip_info->int_vref == 0) { + regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg); + regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg); + } + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5764_ids[] = { + { "ad5744", ID_AD5744 }, + { "ad5744r", ID_AD5744R }, + { "ad5764", ID_AD5764 }, + { "ad5764r", ID_AD5764R }, + { } +}; +MODULE_DEVICE_TABLE(spi, ad5764_ids); + +static struct spi_driver ad5764_driver = { + .driver = { + .name = "ad5764", + .owner = THIS_MODULE, + }, + .probe = ad5764_probe, + .remove = __devexit_p(ad5764_remove), + .id_table = ad5764_ids, +}; +module_spi_driver(ad5764_driver); + +MODULE_AUTHOR("Lars-Peter Clausen "); +MODULE_DESCRIPTION("Analog Devices AD5744/AD5744R/AD5764/AD5764R DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c new file mode 100644 index 000000000000..2bd2e37280ff --- /dev/null +++ b/drivers/iio/dac/ad5791.c @@ -0,0 +1,485 @@ +/* + * AD5760, AD5780, AD5781, AD5790, AD5791 Voltage Output Digital to Analog + * Converter + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define AD5791_RES_MASK(x) ((1 << (x)) - 1) +#define AD5791_DAC_MASK AD5791_RES_MASK(20) +#define AD5791_DAC_MSB (1 << 19) + +#define AD5791_CMD_READ (1 << 23) +#define AD5791_CMD_WRITE (0 << 23) +#define AD5791_ADDR(addr) ((addr) << 20) + +/* Registers */ +#define AD5791_ADDR_NOOP 0 +#define AD5791_ADDR_DAC0 1 +#define AD5791_ADDR_CTRL 2 +#define AD5791_ADDR_CLRCODE 3 +#define AD5791_ADDR_SW_CTRL 4 + +/* Control Register */ +#define AD5791_CTRL_RBUF (1 << 1) +#define AD5791_CTRL_OPGND (1 << 2) +#define AD5791_CTRL_DACTRI (1 << 3) +#define AD5791_CTRL_BIN2SC (1 << 4) +#define AD5791_CTRL_SDODIS (1 << 5) +#define AD5761_CTRL_LINCOMP(x) ((x) << 6) + +#define AD5791_LINCOMP_0_10 0 +#define AD5791_LINCOMP_10_12 1 +#define AD5791_LINCOMP_12_16 2 +#define AD5791_LINCOMP_16_19 3 +#define AD5791_LINCOMP_19_20 12 + +#define AD5780_LINCOMP_0_10 0 +#define AD5780_LINCOMP_10_20 12 + +/* Software Control Register */ +#define AD5791_SWCTRL_LDAC (1 << 0) +#define AD5791_SWCTRL_CLR (1 << 1) +#define AD5791_SWCTRL_RESET (1 << 2) + +#define AD5791_DAC_PWRDN_6K 0 +#define AD5791_DAC_PWRDN_3STATE 1 + +/** + * struct ad5791_chip_info - chip specific information + * @get_lin_comp: function pointer to the device specific function + */ + +struct ad5791_chip_info { + int (*get_lin_comp) (unsigned int span); +}; + +/** + * struct ad5791_state - driver instance specific data + * @us: spi_device + * @reg_vdd: positive supply regulator + * @reg_vss: negative supply regulator + * @chip_info: chip model specific constants + * @vref_mv: actual reference voltage used + * @vref_neg_mv: voltage of the negative supply + * @pwr_down_mode current power down mode + */ + +struct ad5791_state { + struct spi_device *spi; + struct regulator *reg_vdd; + struct regulator *reg_vss; + const struct ad5791_chip_info *chip_info; + unsigned short vref_mv; + unsigned int vref_neg_mv; + unsigned ctrl; + unsigned pwr_down_mode; + bool pwr_down; +}; + +/** + * ad5791_supported_device_ids: + */ + +enum ad5791_supported_device_ids { + ID_AD5760, + ID_AD5780, + ID_AD5781, + ID_AD5791, +}; + +static int ad5791_spi_write(struct spi_device *spi, u8 addr, u32 val) +{ + union { + u32 d32; + u8 d8[4]; + } data; + + data.d32 = cpu_to_be32(AD5791_CMD_WRITE | + AD5791_ADDR(addr) | + (val & AD5791_DAC_MASK)); + + return spi_write(spi, &data.d8[1], 3); +} + +static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val) +{ + union { + u32 d32; + u8 d8[4]; + } data[3]; + int ret; + struct spi_message msg; + struct spi_transfer xfers[] = { + { + .tx_buf = &data[0].d8[1], + .bits_per_word = 8, + .len = 3, + .cs_change = 1, + }, { + .tx_buf = &data[1].d8[1], + .rx_buf = &data[2].d8[1], + .bits_per_word = 8, + .len = 3, + }, + }; + + data[0].d32 = cpu_to_be32(AD5791_CMD_READ | + AD5791_ADDR(addr)); + data[1].d32 = cpu_to_be32(AD5791_ADDR(AD5791_ADDR_NOOP)); + + spi_message_init(&msg); + spi_message_add_tail(&xfers[0], &msg); + spi_message_add_tail(&xfers[1], &msg); + ret = spi_sync(spi, &msg); + + *val = be32_to_cpu(data[2].d32); + + return ret; +} + +static const char * const ad5791_powerdown_modes[] = { + "6kohm_to_gnd", + "three_state", +}; + +static int ad5791_get_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad5791_state *st = iio_priv(indio_dev); + + return st->pwr_down_mode; +} + +static int ad5791_set_powerdown_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int mode) +{ + struct ad5791_state *st = iio_priv(indio_dev); + + st->pwr_down_mode = mode; + + return 0; +} + +static const struct iio_enum ad5791_powerdown_mode_enum = { + .items = ad5791_powerdown_modes, + .num_items = ARRAY_SIZE(ad5791_powerdown_modes), + .get = ad5791_get_powerdown_mode, + .set = ad5791_set_powerdown_mode, +}; + +static ssize_t ad5791_read_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, char *buf) +{ + struct ad5791_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", st->pwr_down); +} + +static ssize_t ad5791_write_dac_powerdown(struct iio_dev *indio_dev, + uintptr_t private, const struct iio_chan_spec *chan, const char *buf, + size_t len) +{ + bool pwr_down; + int ret; + struct ad5791_state *st = iio_priv(indio_dev); + + ret = strtobool(buf, &pwr_down); + if (ret) + return ret; + + if (!pwr_down) { + st->ctrl &= ~(AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI); + } else { + if (st->pwr_down_mode == AD5791_DAC_PWRDN_6K) + st->ctrl |= AD5791_CTRL_OPGND; + else if (st->pwr_down_mode == AD5791_DAC_PWRDN_3STATE) + st->ctrl |= AD5791_CTRL_DACTRI; + } + st->pwr_down = pwr_down; + + ret = ad5791_spi_write(st->spi, AD5791_ADDR_CTRL, st->ctrl); + + return ret ? ret : len; +} + +static int ad5791_get_lin_comp(unsigned int span) +{ + if (span <= 10000) + return AD5791_LINCOMP_0_10; + else if (span <= 12000) + return AD5791_LINCOMP_10_12; + else if (span <= 16000) + return AD5791_LINCOMP_12_16; + else if (span <= 19000) + return AD5791_LINCOMP_16_19; + else + return AD5791_LINCOMP_19_20; +} + +static int ad5780_get_lin_comp(unsigned int span) +{ + if (span <= 10000) + return AD5780_LINCOMP_0_10; + else + return AD5780_LINCOMP_10_20; +} +static const struct ad5791_chip_info ad5791_chip_info_tbl[] = { + [ID_AD5760] = { + .get_lin_comp = ad5780_get_lin_comp, + }, + [ID_AD5780] = { + .get_lin_comp = ad5780_get_lin_comp, + }, + [ID_AD5781] = { + .get_lin_comp = ad5791_get_lin_comp, + }, + [ID_AD5791] = { + .get_lin_comp = ad5791_get_lin_comp, + }, +}; + +static int ad5791_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct ad5791_state *st = iio_priv(indio_dev); + u64 val64; + int ret; + + switch (m) { + case IIO_CHAN_INFO_RAW: + ret = ad5791_spi_read(st->spi, chan->address, val); + if (ret) + return ret; + *val &= AD5791_DAC_MASK; + *val >>= chan->scan_type.shift; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + *val2 = (((u64)st->vref_mv) * 1000000ULL) >> chan->scan_type.realbits; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_OFFSET: + val64 = (((u64)st->vref_neg_mv) << chan->scan_type.realbits); + do_div(val64, st->vref_mv); + *val = -val64; + return IIO_VAL_INT; + default: + return -EINVAL; + } + +}; + +static const struct iio_chan_spec_ext_info ad5791_ext_info[] = { + { + .name = "powerdown", + .shared = true, + .read = ad5791_read_dac_powerdown, + .write = ad5791_write_dac_powerdown, + }, + IIO_ENUM("powerdown_mode", true, &ad5791_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", &ad5791_powerdown_mode_enum), + { }, +}; + +#define AD5791_CHAN(bits, shift) { \ + .type = IIO_VOLTAGE, \ + .output = 1, \ + .indexed = 1, \ + .address = AD5791_ADDR_DAC0, \ + .channel = 0, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ + .scan_type = IIO_ST('u', bits, 24, shift), \ + .ext_info = ad5791_ext_info, \ +} + +static const struct iio_chan_spec ad5791_channels[] = { + [ID_AD5760] = AD5791_CHAN(16, 4), + [ID_AD5780] = AD5791_CHAN(18, 2), + [ID_AD5781] = AD5791_CHAN(18, 2), + [ID_AD5791] = AD5791_CHAN(20, 0) +}; + +static int ad5791_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct ad5791_state *st = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + val &= AD5791_RES_MASK(chan->scan_type.realbits); + val <<= chan->scan_type.shift; + + return ad5791_spi_write(st->spi, chan->address, val); + + default: + return -EINVAL; + } +} + +static const struct iio_info ad5791_info = { + .read_raw = &ad5791_read_raw, + .write_raw = &ad5791_write_raw, + .driver_module = THIS_MODULE, +}; + +static int __devinit ad5791_probe(struct spi_device *spi) +{ + struct ad5791_platform_data *pdata = spi->dev.platform_data; + struct iio_dev *indio_dev; + struct ad5791_state *st; + int ret, pos_voltage_uv = 0, neg_voltage_uv = 0; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + st = iio_priv(indio_dev); + st->reg_vdd = regulator_get(&spi->dev, "vdd"); + if (!IS_ERR(st->reg_vdd)) { + ret = regulator_enable(st->reg_vdd); + if (ret) + goto error_put_reg_pos; + + pos_voltage_uv = regulator_get_voltage(st->reg_vdd); + } + + st->reg_vss = regulator_get(&spi->dev, "vss"); + if (!IS_ERR(st->reg_vss)) { + ret = regulator_enable(st->reg_vss); + if (ret) + goto error_put_reg_neg; + + neg_voltage_uv = regulator_get_voltage(st->reg_vss); + } + + st->pwr_down = true; + st->spi = spi; + + if (!IS_ERR(st->reg_vss) && !IS_ERR(st->reg_vdd)) { + st->vref_mv = (pos_voltage_uv + neg_voltage_uv) / 1000; + st->vref_neg_mv = neg_voltage_uv / 1000; + } else if (pdata) { + st->vref_mv = pdata->vref_pos_mv + pdata->vref_neg_mv; + st->vref_neg_mv = pdata->vref_neg_mv; + } else { + dev_warn(&spi->dev, "reference voltage unspecified\n"); + } + + ret = ad5791_spi_write(spi, AD5791_ADDR_SW_CTRL, AD5791_SWCTRL_RESET); + if (ret) + goto error_disable_reg_neg; + + st->chip_info = &ad5791_chip_info_tbl[spi_get_device_id(spi) + ->driver_data]; + + + st->ctrl = AD5761_CTRL_LINCOMP(st->chip_info->get_lin_comp(st->vref_mv)) + | ((pdata && pdata->use_rbuf_gain2) ? 0 : AD5791_CTRL_RBUF) | + AD5791_CTRL_BIN2SC; + + ret = ad5791_spi_write(spi, AD5791_ADDR_CTRL, st->ctrl | + AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI); + if (ret) + goto error_disable_reg_neg; + + spi_set_drvdata(spi, indio_dev); + indio_dev->dev.parent = &spi->dev; + indio_dev->info = &ad5791_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels + = &ad5791_channels[spi_get_device_id(spi)->driver_data]; + indio_dev->num_channels = 1; + indio_dev->name = spi_get_device_id(st->spi)->name; + ret = iio_device_register(indio_dev); + if (ret) + goto error_disable_reg_neg; + + return 0; + +error_disable_reg_neg: + if (!IS_ERR(st->reg_vss)) + regulator_disable(st->reg_vss); +error_put_reg_neg: + if (!IS_ERR(st->reg_vss)) + regulator_put(st->reg_vss); + + if (!IS_ERR(st->reg_vdd)) + regulator_disable(st->reg_vdd); +error_put_reg_pos: + if (!IS_ERR(st->reg_vdd)) + regulator_put(st->reg_vdd); + iio_device_free(indio_dev); +error_ret: + + return ret; +} + +static int __devexit ad5791_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5791_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + if (!IS_ERR(st->reg_vdd)) { + regulator_disable(st->reg_vdd); + regulator_put(st->reg_vdd); + } + + if (!IS_ERR(st->reg_vss)) { + regulator_disable(st->reg_vss); + regulator_put(st->reg_vss); + } + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5791_id[] = { + {"ad5760", ID_AD5760}, + {"ad5780", ID_AD5780}, + {"ad5781", ID_AD5781}, + {"ad5790", ID_AD5791}, + {"ad5791", ID_AD5791}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5791_id); + +static struct spi_driver ad5791_driver = { + .driver = { + .name = "ad5791", + .owner = THIS_MODULE, + }, + .probe = ad5791_probe, + .remove = __devexit_p(ad5791_remove), + .id_table = ad5791_id, +}; +module_spi_driver(ad5791_driver); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/max517.c b/drivers/iio/dac/max517.c new file mode 100644 index 000000000000..92c77c82026c --- /dev/null +++ b/drivers/iio/dac/max517.c @@ -0,0 +1,243 @@ +/* + * max517.c - Support for Maxim MAX517, MAX518 and MAX519 + * + * Copyright (C) 2010, 2011 Roland Stigge + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define MAX517_DRV_NAME "max517" + +/* Commands */ +#define COMMAND_CHANNEL0 0x00 +#define COMMAND_CHANNEL1 0x01 /* for MAX518 and MAX519 */ +#define COMMAND_PD 0x08 /* Power Down */ + +enum max517_device_ids { + ID_MAX517, + ID_MAX518, + ID_MAX519, +}; + +struct max517_data { + struct iio_dev *indio_dev; + struct i2c_client *client; + unsigned short vref_mv[2]; +}; + +/* + * channel: bit 0: channel 1 + * bit 1: channel 2 + * (this way, it's possible to set both channels at once) + */ +static int max517_set_value(struct iio_dev *indio_dev, + long val, int channel) +{ + struct max517_data *data = iio_priv(indio_dev); + struct i2c_client *client = data->client; + u8 outbuf[2]; + int res; + + if (val < 0 || val > 255) + return -EINVAL; + + outbuf[0] = channel; + outbuf[1] = val; + + res = i2c_master_send(client, outbuf, 2); + if (res < 0) + return res; + else if (res != 2) + return -EIO; + else + return 0; +} + +static int max517_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct max517_data *data = iio_priv(indio_dev); + unsigned int scale_uv; + + switch (m) { + case IIO_CHAN_INFO_SCALE: + /* Corresponds to Vref / 2^(bits) */ + scale_uv = (data->vref_mv[chan->channel] * 1000) >> 8; + *val = scale_uv / 1000000; + *val2 = scale_uv % 1000000; + return IIO_VAL_INT_PLUS_MICRO; + default: + break; + } + return -EINVAL; +} + +static int max517_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = max517_set_value(indio_dev, val, chan->channel); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +#ifdef CONFIG_PM_SLEEP +static int max517_suspend(struct device *dev) +{ + u8 outbuf = COMMAND_PD; + + return i2c_master_send(to_i2c_client(dev), &outbuf, 1); +} + +static int max517_resume(struct device *dev) +{ + u8 outbuf = 0; + + return i2c_master_send(to_i2c_client(dev), &outbuf, 1); +} + +static SIMPLE_DEV_PM_OPS(max517_pm_ops, max517_suspend, max517_resume); +#define MAX517_PM_OPS (&max517_pm_ops) +#else +#define MAX517_PM_OPS NULL +#endif + +static const struct iio_info max517_info = { + .read_raw = max517_read_raw, + .write_raw = max517_write_raw, + .driver_module = THIS_MODULE, +}; + +#define MAX517_CHANNEL(chan) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (chan), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ + .scan_type = IIO_ST('u', 8, 8, 0), \ +} + +static const struct iio_chan_spec max517_channels[] = { + MAX517_CHANNEL(0), + MAX517_CHANNEL(1) +}; + +static int max517_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct max517_data *data; + struct iio_dev *indio_dev; + struct max517_platform_data *platform_data = client->dev.platform_data; + int err; + + indio_dev = iio_device_alloc(sizeof(*data)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto exit; + } + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + + /* establish that the iio_dev is a child of the i2c device */ + indio_dev->dev.parent = &client->dev; + + /* reduced channel set for MAX517 */ + if (id->driver_data == ID_MAX517) + indio_dev->num_channels = 1; + else + indio_dev->num_channels = 2; + indio_dev->channels = max517_channels; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &max517_info; + + /* + * Reference voltage on MAX518 and default is 5V, else take vref_mv + * from platform_data + */ + if (id->driver_data == ID_MAX518 || !platform_data) { + data->vref_mv[0] = data->vref_mv[1] = 5000; /* mV */ + } else { + data->vref_mv[0] = platform_data->vref_mv[0]; + data->vref_mv[1] = platform_data->vref_mv[1]; + } + + err = iio_device_register(indio_dev); + if (err) + goto exit_free_device; + + dev_info(&client->dev, "DAC registered\n"); + + return 0; + +exit_free_device: + iio_device_free(indio_dev); +exit: + return err; +} + +static int max517_remove(struct i2c_client *client) +{ + iio_device_unregister(i2c_get_clientdata(client)); + iio_device_free(i2c_get_clientdata(client)); + + return 0; +} + +static const struct i2c_device_id max517_id[] = { + { "max517", ID_MAX517 }, + { "max518", ID_MAX518 }, + { "max519", ID_MAX519 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max517_id); + +static struct i2c_driver max517_driver = { + .driver = { + .name = MAX517_DRV_NAME, + .pm = MAX517_PM_OPS, + }, + .probe = max517_probe, + .remove = max517_remove, + .id_table = max517_id, +}; +module_i2c_driver(max517_driver); + +MODULE_AUTHOR("Roland Stigge "); +MODULE_DESCRIPTION("MAX517/MAX518/MAX519 8-bit DAC"); +MODULE_LICENSE("GPL"); diff --git a/drivers/staging/iio/Kconfig b/drivers/staging/iio/Kconfig index 3c8e5ec26ac1..04cd6ec1f70f 100644 --- a/drivers/staging/iio/Kconfig +++ b/drivers/staging/iio/Kconfig @@ -29,7 +29,6 @@ source "drivers/staging/iio/accel/Kconfig" source "drivers/staging/iio/adc/Kconfig" source "drivers/staging/iio/addac/Kconfig" source "drivers/staging/iio/cdc/Kconfig" -source "drivers/staging/iio/dac/Kconfig" source "drivers/staging/iio/frequency/Kconfig" source "drivers/staging/iio/gyro/Kconfig" source "drivers/staging/iio/impedance-analyzer/Kconfig" diff --git a/drivers/staging/iio/Makefile b/drivers/staging/iio/Makefile index 6a46d5afb380..fa6937d92ee3 100644 --- a/drivers/staging/iio/Makefile +++ b/drivers/staging/iio/Makefile @@ -17,7 +17,6 @@ obj-y += accel/ obj-y += adc/ obj-y += addac/ obj-y += cdc/ -obj-y += dac/ obj-y += frequency/ obj-y += gyro/ obj-y += impedance-analyzer/ diff --git a/drivers/staging/iio/dac/Kconfig b/drivers/staging/iio/dac/Kconfig deleted file mode 100644 index a626f03871ec..000000000000 --- a/drivers/staging/iio/dac/Kconfig +++ /dev/null @@ -1,121 +0,0 @@ -# -# DAC drivers -# -menu "Digital to analog converters" - -config AD5064 - tristate "Analog Devices AD5064/64-1/65/44/45/24/25, AD5628/48/66/68 DAC driver" - depends on SPI - help - Say yes here to build support for Analog Devices AD5024, AD5025, AD5044, - AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5648, AD5666, AD5668 Digital - to Analog Converter. - - To compile this driver as a module, choose M here: the - module will be called ad5064. - -config AD5360 - tristate "Analog Devices Analog Devices AD5360/61/62/63/70/71/73 DAC driver" - depends on SPI - help - Say yes here to build support for Analog Devices AD5360, AD5361, - AD5362, AD5363, AD5370, AD5371, AD5373 multi-channel - Digital to Analog Converters (DAC). - - To compile this driver as module choose M here: the module will be called - ad5360. - -config AD5380 - tristate "Analog Devices AD5380/81/82/83/84/90/91/92 DAC driver" - depends on (SPI_MASTER || I2C) - select REGMAP_I2C if I2C - select REGMAP_SPI if SPI_MASTER - help - Say yes here to build support for Analog Devices AD5380, AD5381, - AD5382, AD5383, AD5384, AD5390, AD5391, AD5392 multi-channel - Digital to Analog Converters (DAC). - - To compile this driver as module choose M here: the module will be called - ad5380. - -config AD5421 - tristate "Analog Devices AD5421 DAC driver" - depends on SPI - help - Say yes here to build support for Analog Devices AD5421 loop-powered - digital-to-analog convertors (DAC). - - To compile this driver as module choose M here: the module will be called - ad5421. - -config AD5624R_SPI - tristate "Analog Devices AD5624/44/64R DAC spi driver" - depends on SPI - help - Say yes here to build support for Analog Devices AD5624R, AD5644R and - AD5664R converters (DAC). This driver uses the common SPI interface. - -config AD5446 - tristate "Analog Devices AD5446 and similar single channel DACs driver" - depends on SPI - help - Say yes here to build support for Analog Devices AD5444, AD5446, - AD5512A, AD5541A, AD5542A, AD5543, AD5553, AD5601, AD5611, AD5620, - AD5621, AD5640, AD5660, AD5662 DACs. - - To compile this driver as a module, choose M here: the - module will be called ad5446. - -config AD5504 - tristate "Analog Devices AD5504/AD5501 DAC SPI driver" - depends on SPI - help - Say yes here to build support for Analog Devices AD5504, AD5501, - High Voltage Digital to Analog Converter. - - To compile this driver as a module, choose M here: the - module will be called ad5504. - -config AD5764 - tristate "Analog Devices AD5764/64R/44/44R DAC driver" - depends on SPI_MASTER - help - Say yes here to build support for Analog Devices AD5764, AD5764R, AD5744, - AD5744R Digital to Analog Converter. - - To compile this driver as a module, choose M here: the - module will be called ad5764. - -config AD5791 - tristate "Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC SPI driver" - depends on SPI - help - Say yes here to build support for Analog Devices AD5760, AD5780, - AD5781, AD5790, AD5791 High Resolution Voltage Output Digital to - Analog Converter. - - To compile this driver as a module, choose M here: the - module will be called ad5791. - -config AD5686 - tristate "Analog Devices AD5686R/AD5685R/AD5684R DAC SPI driver" - depends on SPI - help - Say yes here to build support for Analog Devices AD5686R, AD5685R, - AD5684R, AD5791 Voltage Output Digital to - Analog Converter. - - To compile this driver as a module, choose M here: the - module will be called ad5686. - -config MAX517 - tristate "Maxim MAX517/518/519 DAC driver" - depends on I2C && EXPERIMENTAL - help - If you say yes here you get support for the Maxim chips MAX517, - MAX518 and MAX519 (I2C 8-Bit DACs with rail-to-rail outputs). - - This driver can also be built as a module. If so, the module - will be called max517. - -endmenu diff --git a/drivers/staging/iio/dac/Makefile b/drivers/staging/iio/dac/Makefile deleted file mode 100644 index 8ab1d264aab7..000000000000 --- a/drivers/staging/iio/dac/Makefile +++ /dev/null @@ -1,15 +0,0 @@ -# -# Makefile for industrial I/O DAC drivers -# - -obj-$(CONFIG_AD5360) += ad5360.o -obj-$(CONFIG_AD5380) += ad5380.o -obj-$(CONFIG_AD5421) += ad5421.o -obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o -obj-$(CONFIG_AD5064) += ad5064.o -obj-$(CONFIG_AD5504) += ad5504.o -obj-$(CONFIG_AD5446) += ad5446.o -obj-$(CONFIG_AD5764) += ad5764.o -obj-$(CONFIG_AD5791) += ad5791.o -obj-$(CONFIG_AD5686) += ad5686.o -obj-$(CONFIG_MAX517) += max517.o diff --git a/drivers/staging/iio/dac/ad5064.c b/drivers/staging/iio/dac/ad5064.c deleted file mode 100644 index 276af02520af..000000000000 --- a/drivers/staging/iio/dac/ad5064.c +++ /dev/null @@ -1,538 +0,0 @@ -/* - * AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5648, - * AD5666, AD5668 Digital to analog converters driver - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define AD5064_MAX_DAC_CHANNELS 8 -#define AD5064_MAX_VREFS 4 - -#define AD5064_ADDR(x) ((x) << 20) -#define AD5064_CMD(x) ((x) << 24) - -#define AD5064_ADDR_DAC(chan) (chan) -#define AD5064_ADDR_ALL_DAC 0xF - -#define AD5064_CMD_WRITE_INPUT_N 0x0 -#define AD5064_CMD_UPDATE_DAC_N 0x1 -#define AD5064_CMD_WRITE_INPUT_N_UPDATE_ALL 0x2 -#define AD5064_CMD_WRITE_INPUT_N_UPDATE_N 0x3 -#define AD5064_CMD_POWERDOWN_DAC 0x4 -#define AD5064_CMD_CLEAR 0x5 -#define AD5064_CMD_LDAC_MASK 0x6 -#define AD5064_CMD_RESET 0x7 -#define AD5064_CMD_CONFIG 0x8 - -#define AD5064_CONFIG_DAISY_CHAIN_ENABLE BIT(1) -#define AD5064_CONFIG_INT_VREF_ENABLE BIT(0) - -#define AD5064_LDAC_PWRDN_NONE 0x0 -#define AD5064_LDAC_PWRDN_1K 0x1 -#define AD5064_LDAC_PWRDN_100K 0x2 -#define AD5064_LDAC_PWRDN_3STATE 0x3 - -/** - * struct ad5064_chip_info - chip specific information - * @shared_vref: whether the vref supply is shared between channels - * @internal_vref: internal reference voltage. 0 if the chip has no internal - * vref. - * @channel: channel specification - * @num_channels: number of channels - */ - -struct ad5064_chip_info { - bool shared_vref; - unsigned long internal_vref; - const struct iio_chan_spec *channels; - unsigned int num_channels; -}; - -/** - * struct ad5064_state - driver instance specific data - * @spi: spi_device - * @chip_info: chip model specific constants, available modes etc - * @vref_reg: vref supply regulators - * @pwr_down: whether channel is powered down - * @pwr_down_mode: channel's current power down mode - * @dac_cache: current DAC raw value (chip does not support readback) - * @use_internal_vref: set to true if the internal reference voltage should be - * used. - * @data: spi transfer buffers - */ - -struct ad5064_state { - struct spi_device *spi; - const struct ad5064_chip_info *chip_info; - struct regulator_bulk_data vref_reg[AD5064_MAX_VREFS]; - bool pwr_down[AD5064_MAX_DAC_CHANNELS]; - u8 pwr_down_mode[AD5064_MAX_DAC_CHANNELS]; - unsigned int dac_cache[AD5064_MAX_DAC_CHANNELS]; - bool use_internal_vref; - - /* - * DMA (thus cache coherency maintenance) requires the - * transfer buffers to live in their own cache lines. - */ - __be32 data ____cacheline_aligned; -}; - -enum ad5064_type { - ID_AD5024, - ID_AD5025, - ID_AD5044, - ID_AD5045, - ID_AD5064, - ID_AD5064_1, - ID_AD5065, - ID_AD5628_1, - ID_AD5628_2, - ID_AD5648_1, - ID_AD5648_2, - ID_AD5666_1, - ID_AD5666_2, - ID_AD5668_1, - ID_AD5668_2, -}; - -static int ad5064_spi_write(struct ad5064_state *st, unsigned int cmd, - unsigned int addr, unsigned int val, unsigned int shift) -{ - val <<= shift; - - st->data = cpu_to_be32(AD5064_CMD(cmd) | AD5064_ADDR(addr) | val); - - return spi_write(st->spi, &st->data, sizeof(st->data)); -} - -static int ad5064_sync_powerdown_mode(struct ad5064_state *st, - unsigned int channel) -{ - unsigned int val; - int ret; - - val = (0x1 << channel); - - if (st->pwr_down[channel]) - val |= st->pwr_down_mode[channel] << 8; - - ret = ad5064_spi_write(st, AD5064_CMD_POWERDOWN_DAC, 0, val, 0); - - return ret; -} - -static const char * const ad5064_powerdown_modes[] = { - "1kohm_to_gnd", - "100kohm_to_gnd", - "three_state", -}; - -static int ad5064_get_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan) -{ - struct ad5064_state *st = iio_priv(indio_dev); - - return st->pwr_down_mode[chan->channel] - 1; -} - -static int ad5064_set_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, unsigned int mode) -{ - struct ad5064_state *st = iio_priv(indio_dev); - int ret; - - mutex_lock(&indio_dev->mlock); - st->pwr_down_mode[chan->channel] = mode + 1; - - ret = ad5064_sync_powerdown_mode(st, chan->channel); - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static const struct iio_enum ad5064_powerdown_mode_enum = { - .items = ad5064_powerdown_modes, - .num_items = ARRAY_SIZE(ad5064_powerdown_modes), - .get = ad5064_get_powerdown_mode, - .set = ad5064_set_powerdown_mode, -}; - -static ssize_t ad5064_read_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, char *buf) -{ - struct ad5064_state *st = iio_priv(indio_dev); - - return sprintf(buf, "%d\n", st->pwr_down[chan->channel]); -} - -static ssize_t ad5064_write_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, const char *buf, - size_t len) -{ - struct ad5064_state *st = iio_priv(indio_dev); - bool pwr_down; - int ret; - - ret = strtobool(buf, &pwr_down); - if (ret) - return ret; - - mutex_lock(&indio_dev->mlock); - st->pwr_down[chan->channel] = pwr_down; - - ret = ad5064_sync_powerdown_mode(st, chan->channel); - mutex_unlock(&indio_dev->mlock); - return ret ? ret : len; -} - -static int ad5064_get_vref(struct ad5064_state *st, - struct iio_chan_spec const *chan) -{ - unsigned int i; - - if (st->use_internal_vref) - return st->chip_info->internal_vref; - - i = st->chip_info->shared_vref ? 0 : chan->channel; - return regulator_get_voltage(st->vref_reg[i].consumer); -} - -static int ad5064_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long m) -{ - struct ad5064_state *st = iio_priv(indio_dev); - int scale_uv; - - switch (m) { - case IIO_CHAN_INFO_RAW: - *val = st->dac_cache[chan->channel]; - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - scale_uv = ad5064_get_vref(st, chan); - if (scale_uv < 0) - return scale_uv; - - scale_uv = (scale_uv * 100) >> chan->scan_type.realbits; - *val = scale_uv / 100000; - *val2 = (scale_uv % 100000) * 10; - return IIO_VAL_INT_PLUS_MICRO; - default: - break; - } - return -EINVAL; -} - -static int ad5064_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int val, int val2, long mask) -{ - struct ad5064_state *st = iio_priv(indio_dev); - int ret; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - if (val > (1 << chan->scan_type.realbits) || val < 0) - return -EINVAL; - - mutex_lock(&indio_dev->mlock); - ret = ad5064_spi_write(st, AD5064_CMD_WRITE_INPUT_N_UPDATE_N, - chan->address, val, chan->scan_type.shift); - if (ret == 0) - st->dac_cache[chan->channel] = val; - mutex_unlock(&indio_dev->mlock); - break; - default: - ret = -EINVAL; - } - - return ret; -} - -static const struct iio_info ad5064_info = { - .read_raw = ad5064_read_raw, - .write_raw = ad5064_write_raw, - .driver_module = THIS_MODULE, -}; - -static const struct iio_chan_spec_ext_info ad5064_ext_info[] = { - { - .name = "powerdown", - .read = ad5064_read_dac_powerdown, - .write = ad5064_write_dac_powerdown, - }, - IIO_ENUM("powerdown_mode", false, &ad5064_powerdown_mode_enum), - IIO_ENUM_AVAILABLE("powerdown_mode", &ad5064_powerdown_mode_enum), - { }, -}; - -#define AD5064_CHANNEL(chan, bits) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .channel = (chan), \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ - .address = AD5064_ADDR_DAC(chan), \ - .scan_type = IIO_ST('u', (bits), 16, 20 - (bits)), \ - .ext_info = ad5064_ext_info, \ -} - -#define DECLARE_AD5064_CHANNELS(name, bits) \ -const struct iio_chan_spec name[] = { \ - AD5064_CHANNEL(0, bits), \ - AD5064_CHANNEL(1, bits), \ - AD5064_CHANNEL(2, bits), \ - AD5064_CHANNEL(3, bits), \ - AD5064_CHANNEL(4, bits), \ - AD5064_CHANNEL(5, bits), \ - AD5064_CHANNEL(6, bits), \ - AD5064_CHANNEL(7, bits), \ -} - -static DECLARE_AD5064_CHANNELS(ad5024_channels, 12); -static DECLARE_AD5064_CHANNELS(ad5044_channels, 14); -static DECLARE_AD5064_CHANNELS(ad5064_channels, 16); - -static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { - [ID_AD5024] = { - .shared_vref = false, - .channels = ad5024_channels, - .num_channels = 4, - }, - [ID_AD5025] = { - .shared_vref = false, - .channels = ad5024_channels, - .num_channels = 2, - }, - [ID_AD5044] = { - .shared_vref = false, - .channels = ad5044_channels, - .num_channels = 4, - }, - [ID_AD5045] = { - .shared_vref = false, - .channels = ad5044_channels, - .num_channels = 2, - }, - [ID_AD5064] = { - .shared_vref = false, - .channels = ad5064_channels, - .num_channels = 4, - }, - [ID_AD5064_1] = { - .shared_vref = true, - .channels = ad5064_channels, - .num_channels = 4, - }, - [ID_AD5065] = { - .shared_vref = false, - .channels = ad5064_channels, - .num_channels = 2, - }, - [ID_AD5628_1] = { - .shared_vref = true, - .internal_vref = 2500000, - .channels = ad5024_channels, - .num_channels = 8, - }, - [ID_AD5628_2] = { - .shared_vref = true, - .internal_vref = 5000000, - .channels = ad5024_channels, - .num_channels = 8, - }, - [ID_AD5648_1] = { - .shared_vref = true, - .internal_vref = 2500000, - .channels = ad5044_channels, - .num_channels = 8, - }, - [ID_AD5648_2] = { - .shared_vref = true, - .internal_vref = 5000000, - .channels = ad5044_channels, - .num_channels = 8, - }, - [ID_AD5666_1] = { - .shared_vref = true, - .internal_vref = 2500000, - .channels = ad5064_channels, - .num_channels = 4, - }, - [ID_AD5666_2] = { - .shared_vref = true, - .internal_vref = 5000000, - .channels = ad5064_channels, - .num_channels = 4, - }, - [ID_AD5668_1] = { - .shared_vref = true, - .internal_vref = 2500000, - .channels = ad5064_channels, - .num_channels = 8, - }, - [ID_AD5668_2] = { - .shared_vref = true, - .internal_vref = 5000000, - .channels = ad5064_channels, - .num_channels = 8, - }, -}; - -static inline unsigned int ad5064_num_vref(struct ad5064_state *st) -{ - return st->chip_info->shared_vref ? 1 : st->chip_info->num_channels; -} - -static const char * const ad5064_vref_names[] = { - "vrefA", - "vrefB", - "vrefC", - "vrefD", -}; - -static const char * const ad5064_vref_name(struct ad5064_state *st, - unsigned int vref) -{ - return st->chip_info->shared_vref ? "vref" : ad5064_vref_names[vref]; -} - -static int __devinit ad5064_probe(struct spi_device *spi) -{ - enum ad5064_type type = spi_get_device_id(spi)->driver_data; - struct iio_dev *indio_dev; - struct ad5064_state *st; - unsigned int i; - int ret; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) - return -ENOMEM; - - st = iio_priv(indio_dev); - spi_set_drvdata(spi, indio_dev); - - st->chip_info = &ad5064_chip_info_tbl[type]; - st->spi = spi; - - for (i = 0; i < ad5064_num_vref(st); ++i) - st->vref_reg[i].supply = ad5064_vref_name(st, i); - - ret = regulator_bulk_get(&st->spi->dev, ad5064_num_vref(st), - st->vref_reg); - if (ret) { - if (!st->chip_info->internal_vref) - goto error_free; - st->use_internal_vref = true; - ret = ad5064_spi_write(st, AD5064_CMD_CONFIG, 0, - AD5064_CONFIG_INT_VREF_ENABLE, 0); - if (ret) { - dev_err(&spi->dev, "Failed to enable internal vref: %d\n", - ret); - goto error_free; - } - } else { - ret = regulator_bulk_enable(ad5064_num_vref(st), st->vref_reg); - if (ret) - goto error_free_reg; - } - - for (i = 0; i < st->chip_info->num_channels; ++i) { - st->pwr_down_mode[i] = AD5064_LDAC_PWRDN_1K; - st->dac_cache[i] = 0x8000; - } - - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(spi)->name; - indio_dev->info = &ad5064_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = st->chip_info->channels; - indio_dev->num_channels = st->chip_info->num_channels; - - ret = iio_device_register(indio_dev); - if (ret) - goto error_disable_reg; - - return 0; - -error_disable_reg: - if (!st->use_internal_vref) - regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg); -error_free_reg: - if (!st->use_internal_vref) - regulator_bulk_free(ad5064_num_vref(st), st->vref_reg); -error_free: - iio_device_free(indio_dev); - - return ret; -} - - -static int __devexit ad5064_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct ad5064_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - - if (!st->use_internal_vref) { - regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg); - regulator_bulk_free(ad5064_num_vref(st), st->vref_reg); - } - - iio_device_free(indio_dev); - - return 0; -} - -static const struct spi_device_id ad5064_id[] = { - {"ad5024", ID_AD5024}, - {"ad5025", ID_AD5025}, - {"ad5044", ID_AD5044}, - {"ad5045", ID_AD5045}, - {"ad5064", ID_AD5064}, - {"ad5064-1", ID_AD5064_1}, - {"ad5065", ID_AD5065}, - {"ad5628-1", ID_AD5628_1}, - {"ad5628-2", ID_AD5628_2}, - {"ad5648-1", ID_AD5648_1}, - {"ad5648-2", ID_AD5648_2}, - {"ad5666-1", ID_AD5666_1}, - {"ad5666-2", ID_AD5666_2}, - {"ad5668-1", ID_AD5668_1}, - {"ad5668-2", ID_AD5668_2}, - {"ad5668-3", ID_AD5668_2}, /* similar enough to ad5668-2 */ - {} -}; -MODULE_DEVICE_TABLE(spi, ad5064_id); - -static struct spi_driver ad5064_driver = { - .driver = { - .name = "ad5064", - .owner = THIS_MODULE, - }, - .probe = ad5064_probe, - .remove = __devexit_p(ad5064_remove), - .id_table = ad5064_id, -}; -module_spi_driver(ad5064_driver); - -MODULE_AUTHOR("Lars-Peter Clausen "); -MODULE_DESCRIPTION("Analog Devices AD5024/25/44/45/64/64-1/65, AD5628/48/66/68 DAC"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5360.c b/drivers/staging/iio/dac/ad5360.c deleted file mode 100644 index 8fce84fe70b1..000000000000 --- a/drivers/staging/iio/dac/ad5360.c +++ /dev/null @@ -1,570 +0,0 @@ -/* - * Analog devices AD5360, AD5361, AD5362, AD5363, AD5370, AD5371, AD5373 - * multi-channel Digital to Analog Converters driver - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define AD5360_CMD(x) ((x) << 22) -#define AD5360_ADDR(x) ((x) << 16) - -#define AD5360_READBACK_TYPE(x) ((x) << 13) -#define AD5360_READBACK_ADDR(x) ((x) << 7) - -#define AD5360_CHAN_ADDR(chan) ((chan) + 0x8) - -#define AD5360_CMD_WRITE_DATA 0x3 -#define AD5360_CMD_WRITE_OFFSET 0x2 -#define AD5360_CMD_WRITE_GAIN 0x1 -#define AD5360_CMD_SPECIAL_FUNCTION 0x0 - -/* Special function register addresses */ -#define AD5360_REG_SF_NOP 0x0 -#define AD5360_REG_SF_CTRL 0x1 -#define AD5360_REG_SF_OFS(x) (0x2 + (x)) -#define AD5360_REG_SF_READBACK 0x5 - -#define AD5360_SF_CTRL_PWR_DOWN BIT(0) - -#define AD5360_READBACK_X1A 0x0 -#define AD5360_READBACK_X1B 0x1 -#define AD5360_READBACK_OFFSET 0x2 -#define AD5360_READBACK_GAIN 0x3 -#define AD5360_READBACK_SF 0x4 - - -/** - * struct ad5360_chip_info - chip specific information - * @channel_template: channel specification template - * @num_channels: number of channels - * @channels_per_group: number of channels per group - * @num_vrefs: number of vref supplies for the chip -*/ - -struct ad5360_chip_info { - struct iio_chan_spec channel_template; - unsigned int num_channels; - unsigned int channels_per_group; - unsigned int num_vrefs; -}; - -/** - * struct ad5360_state - driver instance specific data - * @spi: spi_device - * @chip_info: chip model specific constants, available modes etc - * @vref_reg: vref supply regulators - * @ctrl: control register cache - * @data: spi transfer buffers - */ - -struct ad5360_state { - struct spi_device *spi; - const struct ad5360_chip_info *chip_info; - struct regulator_bulk_data vref_reg[3]; - unsigned int ctrl; - - /* - * DMA (thus cache coherency maintenance) requires the - * transfer buffers to live in their own cache lines. - */ - union { - __be32 d32; - u8 d8[4]; - } data[2] ____cacheline_aligned; -}; - -enum ad5360_type { - ID_AD5360, - ID_AD5361, - ID_AD5362, - ID_AD5363, - ID_AD5370, - ID_AD5371, - ID_AD5372, - ID_AD5373, -}; - -#define AD5360_CHANNEL(bits) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \ - IIO_CHAN_INFO_OFFSET_SEPARATE_BIT | \ - IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ - IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ - .scan_type = IIO_ST('u', (bits), 16, 16 - (bits)) \ -} - -static const struct ad5360_chip_info ad5360_chip_info_tbl[] = { - [ID_AD5360] = { - .channel_template = AD5360_CHANNEL(16), - .num_channels = 16, - .channels_per_group = 8, - .num_vrefs = 2, - }, - [ID_AD5361] = { - .channel_template = AD5360_CHANNEL(14), - .num_channels = 16, - .channels_per_group = 8, - .num_vrefs = 2, - }, - [ID_AD5362] = { - .channel_template = AD5360_CHANNEL(16), - .num_channels = 8, - .channels_per_group = 4, - .num_vrefs = 2, - }, - [ID_AD5363] = { - .channel_template = AD5360_CHANNEL(14), - .num_channels = 8, - .channels_per_group = 4, - .num_vrefs = 2, - }, - [ID_AD5370] = { - .channel_template = AD5360_CHANNEL(16), - .num_channels = 40, - .channels_per_group = 8, - .num_vrefs = 2, - }, - [ID_AD5371] = { - .channel_template = AD5360_CHANNEL(14), - .num_channels = 40, - .channels_per_group = 8, - .num_vrefs = 3, - }, - [ID_AD5372] = { - .channel_template = AD5360_CHANNEL(16), - .num_channels = 32, - .channels_per_group = 8, - .num_vrefs = 2, - }, - [ID_AD5373] = { - .channel_template = AD5360_CHANNEL(14), - .num_channels = 32, - .channels_per_group = 8, - .num_vrefs = 2, - }, -}; - -static unsigned int ad5360_get_channel_vref_index(struct ad5360_state *st, - unsigned int channel) -{ - unsigned int i; - - /* The first groups have their own vref, while the remaining groups - * share the last vref */ - i = channel / st->chip_info->channels_per_group; - if (i >= st->chip_info->num_vrefs) - i = st->chip_info->num_vrefs - 1; - - return i; -} - -static int ad5360_get_channel_vref(struct ad5360_state *st, - unsigned int channel) -{ - unsigned int i = ad5360_get_channel_vref_index(st, channel); - - return regulator_get_voltage(st->vref_reg[i].consumer); -} - - -static int ad5360_write_unlocked(struct iio_dev *indio_dev, - unsigned int cmd, unsigned int addr, unsigned int val, - unsigned int shift) -{ - struct ad5360_state *st = iio_priv(indio_dev); - - val <<= shift; - val |= AD5360_CMD(cmd) | AD5360_ADDR(addr); - st->data[0].d32 = cpu_to_be32(val); - - return spi_write(st->spi, &st->data[0].d8[1], 3); -} - -static int ad5360_write(struct iio_dev *indio_dev, unsigned int cmd, - unsigned int addr, unsigned int val, unsigned int shift) -{ - int ret; - - mutex_lock(&indio_dev->mlock); - ret = ad5360_write_unlocked(indio_dev, cmd, addr, val, shift); - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static int ad5360_read(struct iio_dev *indio_dev, unsigned int type, - unsigned int addr) -{ - struct ad5360_state *st = iio_priv(indio_dev); - struct spi_message m; - int ret; - struct spi_transfer t[] = { - { - .tx_buf = &st->data[0].d8[1], - .len = 3, - .cs_change = 1, - }, { - .rx_buf = &st->data[1].d8[1], - .len = 3, - }, - }; - - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - - mutex_lock(&indio_dev->mlock); - - st->data[0].d32 = cpu_to_be32(AD5360_CMD(AD5360_CMD_SPECIAL_FUNCTION) | - AD5360_ADDR(AD5360_REG_SF_READBACK) | - AD5360_READBACK_TYPE(type) | - AD5360_READBACK_ADDR(addr)); - - ret = spi_sync(st->spi, &m); - if (ret >= 0) - ret = be32_to_cpu(st->data[1].d32) & 0xffff; - - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static ssize_t ad5360_read_dac_powerdown(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad5360_state *st = iio_priv(indio_dev); - - return sprintf(buf, "%d\n", (bool)(st->ctrl & AD5360_SF_CTRL_PWR_DOWN)); -} - -static int ad5360_update_ctrl(struct iio_dev *indio_dev, unsigned int set, - unsigned int clr) -{ - struct ad5360_state *st = iio_priv(indio_dev); - unsigned int ret; - - mutex_lock(&indio_dev->mlock); - - st->ctrl |= set; - st->ctrl &= ~clr; - - ret = ad5360_write_unlocked(indio_dev, AD5360_CMD_SPECIAL_FUNCTION, - AD5360_REG_SF_CTRL, st->ctrl, 0); - - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static ssize_t ad5360_write_dac_powerdown(struct device *dev, - struct device_attribute *attr, const char *buf, size_t len) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - bool pwr_down; - int ret; - - ret = strtobool(buf, &pwr_down); - if (ret) - return ret; - - if (pwr_down) - ret = ad5360_update_ctrl(indio_dev, AD5360_SF_CTRL_PWR_DOWN, 0); - else - ret = ad5360_update_ctrl(indio_dev, 0, AD5360_SF_CTRL_PWR_DOWN); - - return ret ? ret : len; -} - -static IIO_DEVICE_ATTR(out_voltage_powerdown, - S_IRUGO | S_IWUSR, - ad5360_read_dac_powerdown, - ad5360_write_dac_powerdown, 0); - -static struct attribute *ad5360_attributes[] = { - &iio_dev_attr_out_voltage_powerdown.dev_attr.attr, - NULL, -}; - -static const struct attribute_group ad5360_attribute_group = { - .attrs = ad5360_attributes, -}; - -static int ad5360_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, - int val2, - long mask) -{ - struct ad5360_state *st = iio_priv(indio_dev); - int max_val = (1 << chan->scan_type.realbits); - unsigned int ofs_index; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - if (val >= max_val || val < 0) - return -EINVAL; - - return ad5360_write(indio_dev, AD5360_CMD_WRITE_DATA, - chan->address, val, chan->scan_type.shift); - - case IIO_CHAN_INFO_CALIBBIAS: - if (val >= max_val || val < 0) - return -EINVAL; - - return ad5360_write(indio_dev, AD5360_CMD_WRITE_OFFSET, - chan->address, val, chan->scan_type.shift); - - case IIO_CHAN_INFO_CALIBSCALE: - if (val >= max_val || val < 0) - return -EINVAL; - - return ad5360_write(indio_dev, AD5360_CMD_WRITE_GAIN, - chan->address, val, chan->scan_type.shift); - - case IIO_CHAN_INFO_OFFSET: - if (val <= -max_val || val > 0) - return -EINVAL; - - val = -val; - - /* offset is supposed to have the same scale as raw, but it - * is always 14bits wide, so on a chip where the raw value has - * more bits, we need to shift offset. */ - val >>= (chan->scan_type.realbits - 14); - - /* There is one DAC offset register per vref. Changing one - * channels offset will also change the offset for all other - * channels which share the same vref supply. */ - ofs_index = ad5360_get_channel_vref_index(st, chan->channel); - return ad5360_write(indio_dev, AD5360_CMD_SPECIAL_FUNCTION, - AD5360_REG_SF_OFS(ofs_index), val, 0); - default: - break; - } - - return -EINVAL; -} - -static int ad5360_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long m) -{ - struct ad5360_state *st = iio_priv(indio_dev); - unsigned int ofs_index; - int scale_uv; - int ret; - - switch (m) { - case IIO_CHAN_INFO_RAW: - ret = ad5360_read(indio_dev, AD5360_READBACK_X1A, - chan->address); - if (ret < 0) - return ret; - *val = ret >> chan->scan_type.shift; - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - /* vout = 4 * vref * dac_code */ - scale_uv = ad5360_get_channel_vref(st, chan->channel) * 4 * 100; - if (scale_uv < 0) - return scale_uv; - - scale_uv >>= (chan->scan_type.realbits); - *val = scale_uv / 100000; - *val2 = (scale_uv % 100000) * 10; - return IIO_VAL_INT_PLUS_MICRO; - case IIO_CHAN_INFO_CALIBBIAS: - ret = ad5360_read(indio_dev, AD5360_READBACK_OFFSET, - chan->address); - if (ret < 0) - return ret; - *val = ret; - return IIO_VAL_INT; - case IIO_CHAN_INFO_CALIBSCALE: - ret = ad5360_read(indio_dev, AD5360_READBACK_GAIN, - chan->address); - if (ret < 0) - return ret; - *val = ret; - return IIO_VAL_INT; - case IIO_CHAN_INFO_OFFSET: - ofs_index = ad5360_get_channel_vref_index(st, chan->channel); - ret = ad5360_read(indio_dev, AD5360_READBACK_SF, - AD5360_REG_SF_OFS(ofs_index)); - if (ret < 0) - return ret; - - ret <<= (chan->scan_type.realbits - 14); - *val = -ret; - return IIO_VAL_INT; - } - - return -EINVAL; -} - -static const struct iio_info ad5360_info = { - .read_raw = ad5360_read_raw, - .write_raw = ad5360_write_raw, - .attrs = &ad5360_attribute_group, - .driver_module = THIS_MODULE, -}; - -static const char * const ad5360_vref_name[] = { - "vref0", "vref1", "vref2" -}; - -static int __devinit ad5360_alloc_channels(struct iio_dev *indio_dev) -{ - struct ad5360_state *st = iio_priv(indio_dev); - struct iio_chan_spec *channels; - unsigned int i; - - channels = kcalloc(st->chip_info->num_channels, - sizeof(struct iio_chan_spec), GFP_KERNEL); - - if (!channels) - return -ENOMEM; - - for (i = 0; i < st->chip_info->num_channels; ++i) { - channels[i] = st->chip_info->channel_template; - channels[i].channel = i; - channels[i].address = AD5360_CHAN_ADDR(i); - } - - indio_dev->channels = channels; - - return 0; -} - -static int __devinit ad5360_probe(struct spi_device *spi) -{ - enum ad5360_type type = spi_get_device_id(spi)->driver_data; - struct iio_dev *indio_dev; - struct ad5360_state *st; - unsigned int i; - int ret; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - dev_err(&spi->dev, "Failed to allocate iio device\n"); - return -ENOMEM; - } - - st = iio_priv(indio_dev); - spi_set_drvdata(spi, indio_dev); - - st->chip_info = &ad5360_chip_info_tbl[type]; - st->spi = spi; - - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(spi)->name; - indio_dev->info = &ad5360_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->num_channels = st->chip_info->num_channels; - - ret = ad5360_alloc_channels(indio_dev); - if (ret) { - dev_err(&spi->dev, "Failed to allocate channel spec: %d\n", ret); - goto error_free; - } - - for (i = 0; i < st->chip_info->num_vrefs; ++i) - st->vref_reg[i].supply = ad5360_vref_name[i]; - - ret = regulator_bulk_get(&st->spi->dev, st->chip_info->num_vrefs, - st->vref_reg); - if (ret) { - dev_err(&spi->dev, "Failed to request vref regulators: %d\n", ret); - goto error_free_channels; - } - - ret = regulator_bulk_enable(st->chip_info->num_vrefs, st->vref_reg); - if (ret) { - dev_err(&spi->dev, "Failed to enable vref regulators: %d\n", ret); - goto error_free_reg; - } - - ret = iio_device_register(indio_dev); - if (ret) { - dev_err(&spi->dev, "Failed to register iio device: %d\n", ret); - goto error_disable_reg; - } - - return 0; - -error_disable_reg: - regulator_bulk_disable(st->chip_info->num_vrefs, st->vref_reg); -error_free_reg: - regulator_bulk_free(st->chip_info->num_vrefs, st->vref_reg); -error_free_channels: - kfree(indio_dev->channels); -error_free: - iio_device_free(indio_dev); - - return ret; -} - -static int __devexit ad5360_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct ad5360_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - - kfree(indio_dev->channels); - - regulator_bulk_disable(st->chip_info->num_vrefs, st->vref_reg); - regulator_bulk_free(st->chip_info->num_vrefs, st->vref_reg); - - iio_device_free(indio_dev); - - return 0; -} - -static const struct spi_device_id ad5360_ids[] = { - { "ad5360", ID_AD5360 }, - { "ad5361", ID_AD5361 }, - { "ad5362", ID_AD5362 }, - { "ad5363", ID_AD5363 }, - { "ad5370", ID_AD5370 }, - { "ad5371", ID_AD5371 }, - { "ad5372", ID_AD5372 }, - { "ad5373", ID_AD5373 }, - {} -}; -MODULE_DEVICE_TABLE(spi, ad5360_ids); - -static struct spi_driver ad5360_driver = { - .driver = { - .name = "ad5360", - .owner = THIS_MODULE, - }, - .probe = ad5360_probe, - .remove = __devexit_p(ad5360_remove), - .id_table = ad5360_ids, -}; -module_spi_driver(ad5360_driver); - -MODULE_AUTHOR("Lars-Peter Clausen "); -MODULE_DESCRIPTION("Analog Devices AD5360/61/62/63/70/71/72/73 DAC"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5380.c b/drivers/staging/iio/dac/ad5380.c deleted file mode 100644 index 5dfb4451728f..000000000000 --- a/drivers/staging/iio/dac/ad5380.c +++ /dev/null @@ -1,657 +0,0 @@ -/* - * Analog devices AD5380, AD5381, AD5382, AD5383, AD5390, AD5391, AD5392 - * multi-channel Digital to Analog Converters driver - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define AD5380_REG_DATA(x) (((x) << 2) | 3) -#define AD5380_REG_OFFSET(x) (((x) << 2) | 2) -#define AD5380_REG_GAIN(x) (((x) << 2) | 1) -#define AD5380_REG_SF_PWR_DOWN (8 << 2) -#define AD5380_REG_SF_PWR_UP (9 << 2) -#define AD5380_REG_SF_CTRL (12 << 2) - -#define AD5380_CTRL_PWR_DOWN_MODE_OFFSET 13 -#define AD5380_CTRL_INT_VREF_2V5 BIT(12) -#define AD5380_CTRL_INT_VREF_EN BIT(10) - -/** - * struct ad5380_chip_info - chip specific information - * @channel_template: channel specification template - * @num_channels: number of channels - * @int_vref: internal vref in uV -*/ - -struct ad5380_chip_info { - struct iio_chan_spec channel_template; - unsigned int num_channels; - unsigned int int_vref; -}; - -/** - * struct ad5380_state - driver instance specific data - * @regmap: regmap instance used by the device - * @chip_info: chip model specific constants, available modes etc - * @vref_reg: vref supply regulator - * @vref: actual reference voltage used in uA - * @pwr_down: whether the chip is currently in power down mode - */ - -struct ad5380_state { - struct regmap *regmap; - const struct ad5380_chip_info *chip_info; - struct regulator *vref_reg; - int vref; - bool pwr_down; -}; - -enum ad5380_type { - ID_AD5380_3, - ID_AD5380_5, - ID_AD5381_3, - ID_AD5381_5, - ID_AD5382_3, - ID_AD5382_5, - ID_AD5383_3, - ID_AD5383_5, - ID_AD5390_3, - ID_AD5390_5, - ID_AD5391_3, - ID_AD5391_5, - ID_AD5392_3, - ID_AD5392_5, -}; - -static ssize_t ad5380_read_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, char *buf) -{ - struct ad5380_state *st = iio_priv(indio_dev); - - return sprintf(buf, "%d\n", st->pwr_down); -} - -static ssize_t ad5380_write_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, const char *buf, - size_t len) -{ - struct ad5380_state *st = iio_priv(indio_dev); - bool pwr_down; - int ret; - - ret = strtobool(buf, &pwr_down); - if (ret) - return ret; - - mutex_lock(&indio_dev->mlock); - - if (pwr_down) - ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_DOWN, 0); - else - ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_UP, 0); - - st->pwr_down = pwr_down; - - mutex_unlock(&indio_dev->mlock); - - return ret ? ret : len; -} - -static const char * const ad5380_powerdown_modes[] = { - "100kohm_to_gnd", - "three_state", -}; - -static int ad5380_get_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan) -{ - struct ad5380_state *st = iio_priv(indio_dev); - unsigned int mode; - int ret; - - ret = regmap_read(st->regmap, AD5380_REG_SF_CTRL, &mode); - if (ret) - return ret; - - mode = (mode >> AD5380_CTRL_PWR_DOWN_MODE_OFFSET) & 1; - - return mode; -} - -static int ad5380_set_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, unsigned int mode) -{ - struct ad5380_state *st = iio_priv(indio_dev); - int ret; - - ret = regmap_update_bits(st->regmap, AD5380_REG_SF_CTRL, - 1 << AD5380_CTRL_PWR_DOWN_MODE_OFFSET, - mode << AD5380_CTRL_PWR_DOWN_MODE_OFFSET); - - return ret; -} - -static const struct iio_enum ad5380_powerdown_mode_enum = { - .items = ad5380_powerdown_modes, - .num_items = ARRAY_SIZE(ad5380_powerdown_modes), - .get = ad5380_get_powerdown_mode, - .set = ad5380_set_powerdown_mode, -}; - -static unsigned int ad5380_info_to_reg(struct iio_chan_spec const *chan, - long info) -{ - switch (info) { - case 0: - return AD5380_REG_DATA(chan->address); - case IIO_CHAN_INFO_CALIBBIAS: - return AD5380_REG_OFFSET(chan->address); - case IIO_CHAN_INFO_CALIBSCALE: - return AD5380_REG_GAIN(chan->address); - default: - break; - } - - return 0; -} - -static int ad5380_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int val, int val2, long info) -{ - const unsigned int max_val = (1 << chan->scan_type.realbits); - struct ad5380_state *st = iio_priv(indio_dev); - - switch (info) { - case IIO_CHAN_INFO_RAW: - case IIO_CHAN_INFO_CALIBSCALE: - if (val >= max_val || val < 0) - return -EINVAL; - - return regmap_write(st->regmap, - ad5380_info_to_reg(chan, info), - val << chan->scan_type.shift); - case IIO_CHAN_INFO_CALIBBIAS: - val += (1 << chan->scan_type.realbits) / 2; - if (val >= max_val || val < 0) - return -EINVAL; - - return regmap_write(st->regmap, - AD5380_REG_OFFSET(chan->address), - val << chan->scan_type.shift); - default: - break; - } - return -EINVAL; -} - -static int ad5380_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int *val, int *val2, long info) -{ - struct ad5380_state *st = iio_priv(indio_dev); - unsigned long scale_uv; - int ret; - - switch (info) { - case IIO_CHAN_INFO_RAW: - case IIO_CHAN_INFO_CALIBSCALE: - ret = regmap_read(st->regmap, ad5380_info_to_reg(chan, info), - val); - if (ret) - return ret; - *val >>= chan->scan_type.shift; - return IIO_VAL_INT; - case IIO_CHAN_INFO_CALIBBIAS: - ret = regmap_read(st->regmap, AD5380_REG_OFFSET(chan->address), - val); - if (ret) - return ret; - *val >>= chan->scan_type.shift; - val -= (1 << chan->scan_type.realbits) / 2; - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - scale_uv = ((2 * st->vref) >> chan->scan_type.realbits) * 100; - *val = scale_uv / 100000; - *val2 = (scale_uv % 100000) * 10; - return IIO_VAL_INT_PLUS_MICRO; - default: - break; - } - - return -EINVAL; -} - -static const struct iio_info ad5380_info = { - .read_raw = ad5380_read_raw, - .write_raw = ad5380_write_raw, - .driver_module = THIS_MODULE, -}; - -static struct iio_chan_spec_ext_info ad5380_ext_info[] = { - { - .name = "powerdown", - .read = ad5380_read_dac_powerdown, - .write = ad5380_write_dac_powerdown, - }, - IIO_ENUM("powerdown_mode", true, &ad5380_powerdown_mode_enum), - IIO_ENUM_AVAILABLE("powerdown_mode", &ad5380_powerdown_mode_enum), - { }, -}; - -#define AD5380_CHANNEL(_bits) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SHARED_BIT | \ - IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ - IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ - .scan_type = IIO_ST('u', (_bits), 16, 14 - (_bits)), \ - .ext_info = ad5380_ext_info, \ -} - -static const struct ad5380_chip_info ad5380_chip_info_tbl[] = { - [ID_AD5380_3] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 40, - .int_vref = 1250000, - }, - [ID_AD5380_5] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 40, - .int_vref = 2500000, - }, - [ID_AD5381_3] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 16, - .int_vref = 1250000, - }, - [ID_AD5381_5] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 16, - .int_vref = 2500000, - }, - [ID_AD5382_3] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 32, - .int_vref = 1250000, - }, - [ID_AD5382_5] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 32, - .int_vref = 2500000, - }, - [ID_AD5383_3] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 32, - .int_vref = 1250000, - }, - [ID_AD5383_5] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 32, - .int_vref = 2500000, - }, - [ID_AD5390_3] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 16, - .int_vref = 1250000, - }, - [ID_AD5390_5] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 16, - .int_vref = 2500000, - }, - [ID_AD5391_3] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 16, - .int_vref = 1250000, - }, - [ID_AD5391_5] = { - .channel_template = AD5380_CHANNEL(12), - .num_channels = 16, - .int_vref = 2500000, - }, - [ID_AD5392_3] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 8, - .int_vref = 1250000, - }, - [ID_AD5392_5] = { - .channel_template = AD5380_CHANNEL(14), - .num_channels = 8, - .int_vref = 2500000, - }, -}; - -static int __devinit ad5380_alloc_channels(struct iio_dev *indio_dev) -{ - struct ad5380_state *st = iio_priv(indio_dev); - struct iio_chan_spec *channels; - unsigned int i; - - channels = kcalloc(st->chip_info->num_channels, - sizeof(struct iio_chan_spec), GFP_KERNEL); - - if (!channels) - return -ENOMEM; - - for (i = 0; i < st->chip_info->num_channels; ++i) { - channels[i] = st->chip_info->channel_template; - channels[i].channel = i; - channels[i].address = i; - } - - indio_dev->channels = channels; - - return 0; -} - -static int __devinit ad5380_probe(struct device *dev, struct regmap *regmap, - enum ad5380_type type, const char *name) -{ - struct iio_dev *indio_dev; - struct ad5380_state *st; - unsigned int ctrl = 0; - int ret; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - dev_err(dev, "Failed to allocate iio device\n"); - ret = -ENOMEM; - goto error_regmap_exit; - } - - st = iio_priv(indio_dev); - dev_set_drvdata(dev, indio_dev); - - st->chip_info = &ad5380_chip_info_tbl[type]; - st->regmap = regmap; - - indio_dev->dev.parent = dev; - indio_dev->name = name; - indio_dev->info = &ad5380_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->num_channels = st->chip_info->num_channels; - - ret = ad5380_alloc_channels(indio_dev); - if (ret) { - dev_err(dev, "Failed to allocate channel spec: %d\n", ret); - goto error_free; - } - - if (st->chip_info->int_vref == 2500000) - ctrl |= AD5380_CTRL_INT_VREF_2V5; - - st->vref_reg = regulator_get(dev, "vref"); - if (!IS_ERR(st->vref_reg)) { - ret = regulator_enable(st->vref_reg); - if (ret) { - dev_err(dev, "Failed to enable vref regulators: %d\n", - ret); - goto error_free_reg; - } - - st->vref = regulator_get_voltage(st->vref_reg); - } else { - st->vref = st->chip_info->int_vref; - ctrl |= AD5380_CTRL_INT_VREF_EN; - } - - ret = regmap_write(st->regmap, AD5380_REG_SF_CTRL, ctrl); - if (ret) { - dev_err(dev, "Failed to write to device: %d\n", ret); - goto error_disable_reg; - } - - ret = iio_device_register(indio_dev); - if (ret) { - dev_err(dev, "Failed to register iio device: %d\n", ret); - goto error_disable_reg; - } - - return 0; - -error_disable_reg: - if (!IS_ERR(st->vref_reg)) - regulator_disable(st->vref_reg); -error_free_reg: - if (!IS_ERR(st->vref_reg)) - regulator_put(st->vref_reg); - - kfree(indio_dev->channels); -error_free: - iio_device_free(indio_dev); -error_regmap_exit: - regmap_exit(regmap); - - return ret; -} - -static int __devexit ad5380_remove(struct device *dev) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct ad5380_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - - kfree(indio_dev->channels); - - if (!IS_ERR(st->vref_reg)) { - regulator_disable(st->vref_reg); - regulator_put(st->vref_reg); - } - - regmap_exit(st->regmap); - iio_device_free(indio_dev); - - return 0; -} - -static bool ad5380_reg_false(struct device *dev, unsigned int reg) -{ - return false; -} - -static const struct regmap_config ad5380_regmap_config = { - .reg_bits = 10, - .val_bits = 14, - - .max_register = AD5380_REG_DATA(40), - .cache_type = REGCACHE_RBTREE, - - .volatile_reg = ad5380_reg_false, - .readable_reg = ad5380_reg_false, -}; - -#if IS_ENABLED(CONFIG_SPI_MASTER) - -static int __devinit ad5380_spi_probe(struct spi_device *spi) -{ - const struct spi_device_id *id = spi_get_device_id(spi); - struct regmap *regmap; - - regmap = regmap_init_spi(spi, &ad5380_regmap_config); - - if (IS_ERR(regmap)) - return PTR_ERR(regmap); - - return ad5380_probe(&spi->dev, regmap, id->driver_data, id->name); -} - -static int __devexit ad5380_spi_remove(struct spi_device *spi) -{ - return ad5380_remove(&spi->dev); -} - -static const struct spi_device_id ad5380_spi_ids[] = { - { "ad5380-3", ID_AD5380_3 }, - { "ad5380-5", ID_AD5380_5 }, - { "ad5381-3", ID_AD5381_3 }, - { "ad5381-5", ID_AD5381_5 }, - { "ad5382-3", ID_AD5382_3 }, - { "ad5382-5", ID_AD5382_5 }, - { "ad5383-3", ID_AD5383_3 }, - { "ad5383-5", ID_AD5383_5 }, - { "ad5384-3", ID_AD5380_3 }, - { "ad5384-5", ID_AD5380_5 }, - { "ad5390-3", ID_AD5390_3 }, - { "ad5390-5", ID_AD5390_5 }, - { "ad5391-3", ID_AD5391_3 }, - { "ad5391-5", ID_AD5391_5 }, - { "ad5392-3", ID_AD5392_3 }, - { "ad5392-5", ID_AD5392_5 }, - { } -}; -MODULE_DEVICE_TABLE(spi, ad5380_spi_ids); - -static struct spi_driver ad5380_spi_driver = { - .driver = { - .name = "ad5380", - .owner = THIS_MODULE, - }, - .probe = ad5380_spi_probe, - .remove = __devexit_p(ad5380_spi_remove), - .id_table = ad5380_spi_ids, -}; - -static inline int ad5380_spi_register_driver(void) -{ - return spi_register_driver(&ad5380_spi_driver); -} - -static inline void ad5380_spi_unregister_driver(void) -{ - spi_unregister_driver(&ad5380_spi_driver); -} - -#else - -static inline int ad5380_spi_register_driver(void) -{ - return 0; -} - -static inline void ad5380_spi_unregister_driver(void) -{ -} - -#endif - -#if IS_ENABLED(CONFIG_I2C) - -static int __devinit ad5380_i2c_probe(struct i2c_client *i2c, - const struct i2c_device_id *id) -{ - struct regmap *regmap; - - regmap = regmap_init_i2c(i2c, &ad5380_regmap_config); - - if (IS_ERR(regmap)) - return PTR_ERR(regmap); - - return ad5380_probe(&i2c->dev, regmap, id->driver_data, id->name); -} - -static int __devexit ad5380_i2c_remove(struct i2c_client *i2c) -{ - return ad5380_remove(&i2c->dev); -} - -static const struct i2c_device_id ad5380_i2c_ids[] = { - { "ad5380-3", ID_AD5380_3 }, - { "ad5380-5", ID_AD5380_5 }, - { "ad5381-3", ID_AD5381_3 }, - { "ad5381-5", ID_AD5381_5 }, - { "ad5382-3", ID_AD5382_3 }, - { "ad5382-5", ID_AD5382_5 }, - { "ad5383-3", ID_AD5383_3 }, - { "ad5383-5", ID_AD5383_5 }, - { "ad5384-3", ID_AD5380_3 }, - { "ad5384-5", ID_AD5380_5 }, - { "ad5390-3", ID_AD5390_3 }, - { "ad5390-5", ID_AD5390_5 }, - { "ad5391-3", ID_AD5391_3 }, - { "ad5391-5", ID_AD5391_5 }, - { "ad5392-3", ID_AD5392_3 }, - { "ad5392-5", ID_AD5392_5 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, ad5380_i2c_ids); - -static struct i2c_driver ad5380_i2c_driver = { - .driver = { - .name = "ad5380", - .owner = THIS_MODULE, - }, - .probe = ad5380_i2c_probe, - .remove = __devexit_p(ad5380_i2c_remove), - .id_table = ad5380_i2c_ids, -}; - -static inline int ad5380_i2c_register_driver(void) -{ - return i2c_add_driver(&ad5380_i2c_driver); -} - -static inline void ad5380_i2c_unregister_driver(void) -{ - i2c_del_driver(&ad5380_i2c_driver); -} - -#else - -static inline int ad5380_i2c_register_driver(void) -{ - return 0; -} - -static inline void ad5380_i2c_unregister_driver(void) -{ -} - -#endif - -static int __init ad5380_spi_init(void) -{ - int ret; - - ret = ad5380_spi_register_driver(); - if (ret) - return ret; - - ret = ad5380_i2c_register_driver(); - if (ret) { - ad5380_spi_unregister_driver(); - return ret; - } - - return 0; -} -module_init(ad5380_spi_init); - -static void __exit ad5380_spi_exit(void) -{ - ad5380_i2c_unregister_driver(); - ad5380_spi_unregister_driver(); - -} -module_exit(ad5380_spi_exit); - -MODULE_AUTHOR("Lars-Peter Clausen "); -MODULE_DESCRIPTION("Analog Devices AD5380/81/82/83/84/90/91/92 DAC"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5421.c b/drivers/staging/iio/dac/ad5421.c deleted file mode 100644 index ea2f83b4e357..000000000000 --- a/drivers/staging/iio/dac/ad5421.c +++ /dev/null @@ -1,544 +0,0 @@ -/* - * AD5421 Digital to analog converters driver - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include "ad5421.h" - - -#define AD5421_REG_DAC_DATA 0x1 -#define AD5421_REG_CTRL 0x2 -#define AD5421_REG_OFFSET 0x3 -#define AD5421_REG_GAIN 0x4 -/* load dac and fault shared the same register number. Writing to it will cause - * a dac load command, reading from it will return the fault status register */ -#define AD5421_REG_LOAD_DAC 0x5 -#define AD5421_REG_FAULT 0x5 -#define AD5421_REG_FORCE_ALARM_CURRENT 0x6 -#define AD5421_REG_RESET 0x7 -#define AD5421_REG_START_CONVERSION 0x8 -#define AD5421_REG_NOOP 0x9 - -#define AD5421_CTRL_WATCHDOG_DISABLE BIT(12) -#define AD5421_CTRL_AUTO_FAULT_READBACK BIT(11) -#define AD5421_CTRL_MIN_CURRENT BIT(9) -#define AD5421_CTRL_ADC_SOURCE_TEMP BIT(8) -#define AD5421_CTRL_ADC_ENABLE BIT(7) -#define AD5421_CTRL_PWR_DOWN_INT_VREF BIT(6) - -#define AD5421_FAULT_SPI BIT(15) -#define AD5421_FAULT_PEC BIT(14) -#define AD5421_FAULT_OVER_CURRENT BIT(13) -#define AD5421_FAULT_UNDER_CURRENT BIT(12) -#define AD5421_FAULT_TEMP_OVER_140 BIT(11) -#define AD5421_FAULT_TEMP_OVER_100 BIT(10) -#define AD5421_FAULT_UNDER_VOLTAGE_6V BIT(9) -#define AD5421_FAULT_UNDER_VOLTAGE_12V BIT(8) - -/* These bits will cause the fault pin to go high */ -#define AD5421_FAULT_TRIGGER_IRQ \ - (AD5421_FAULT_SPI | AD5421_FAULT_PEC | AD5421_FAULT_OVER_CURRENT | \ - AD5421_FAULT_UNDER_CURRENT | AD5421_FAULT_TEMP_OVER_140) - -/** - * struct ad5421_state - driver instance specific data - * @spi: spi_device - * @ctrl: control register cache - * @current_range: current range which the device is configured for - * @data: spi transfer buffers - * @fault_mask: software masking of events - */ -struct ad5421_state { - struct spi_device *spi; - unsigned int ctrl; - enum ad5421_current_range current_range; - unsigned int fault_mask; - - /* - * DMA (thus cache coherency maintenance) requires the - * transfer buffers to live in their own cache lines. - */ - union { - u32 d32; - u8 d8[4]; - } data[2] ____cacheline_aligned; -}; - -static const struct iio_chan_spec ad5421_channels[] = { - { - .type = IIO_CURRENT, - .indexed = 1, - .output = 1, - .channel = 0, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | - IIO_CHAN_INFO_SCALE_SHARED_BIT | - IIO_CHAN_INFO_OFFSET_SHARED_BIT | - IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | - IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, - .scan_type = IIO_ST('u', 16, 16, 0), - .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | - IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), - }, - { - .type = IIO_TEMP, - .channel = -1, - .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), - }, -}; - -static int ad5421_write_unlocked(struct iio_dev *indio_dev, - unsigned int reg, unsigned int val) -{ - struct ad5421_state *st = iio_priv(indio_dev); - - st->data[0].d32 = cpu_to_be32((reg << 16) | val); - - return spi_write(st->spi, &st->data[0].d8[1], 3); -} - -static int ad5421_write(struct iio_dev *indio_dev, unsigned int reg, - unsigned int val) -{ - int ret; - - mutex_lock(&indio_dev->mlock); - ret = ad5421_write_unlocked(indio_dev, reg, val); - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static int ad5421_read(struct iio_dev *indio_dev, unsigned int reg) -{ - struct ad5421_state *st = iio_priv(indio_dev); - struct spi_message m; - int ret; - struct spi_transfer t[] = { - { - .tx_buf = &st->data[0].d8[1], - .len = 3, - .cs_change = 1, - }, { - .rx_buf = &st->data[1].d8[1], - .len = 3, - }, - }; - - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - - mutex_lock(&indio_dev->mlock); - - st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16)); - - ret = spi_sync(st->spi, &m); - if (ret >= 0) - ret = be32_to_cpu(st->data[1].d32) & 0xffff; - - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static int ad5421_update_ctrl(struct iio_dev *indio_dev, unsigned int set, - unsigned int clr) -{ - struct ad5421_state *st = iio_priv(indio_dev); - unsigned int ret; - - mutex_lock(&indio_dev->mlock); - - st->ctrl &= ~clr; - st->ctrl |= set; - - ret = ad5421_write_unlocked(indio_dev, AD5421_REG_CTRL, st->ctrl); - - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static irqreturn_t ad5421_fault_handler(int irq, void *data) -{ - struct iio_dev *indio_dev = data; - struct ad5421_state *st = iio_priv(indio_dev); - unsigned int fault; - unsigned int old_fault = 0; - unsigned int events; - - fault = ad5421_read(indio_dev, AD5421_REG_FAULT); - if (!fault) - return IRQ_NONE; - - /* If we had a fault, this might mean that the DAC has lost its state - * and has been reset. Make sure that the control register actually - * contains what we expect it to contain. Otherwise the watchdog might - * be enabled and we get watchdog timeout faults, which will render the - * DAC unusable. */ - ad5421_update_ctrl(indio_dev, 0, 0); - - - /* The fault pin stays high as long as a fault condition is present and - * it is not possible to mask fault conditions. For certain fault - * conditions for example like over-temperature it takes some time - * until the fault condition disappears. If we would exit the interrupt - * handler immediately after handling the event it would be entered - * again instantly. Thus we fall back to polling in case we detect that - * a interrupt condition is still present. - */ - do { - /* 0xffff is a invalid value for the register and will only be - * read if there has been a communication error */ - if (fault == 0xffff) - fault = 0; - - /* we are only interested in new events */ - events = (old_fault ^ fault) & fault; - events &= st->fault_mask; - - if (events & AD5421_FAULT_OVER_CURRENT) { - iio_push_event(indio_dev, - IIO_UNMOD_EVENT_CODE(IIO_CURRENT, - 0, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_RISING), - iio_get_time_ns()); - } - - if (events & AD5421_FAULT_UNDER_CURRENT) { - iio_push_event(indio_dev, - IIO_UNMOD_EVENT_CODE(IIO_CURRENT, - 0, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_FALLING), - iio_get_time_ns()); - } - - if (events & AD5421_FAULT_TEMP_OVER_140) { - iio_push_event(indio_dev, - IIO_UNMOD_EVENT_CODE(IIO_TEMP, - 0, - IIO_EV_TYPE_MAG, - IIO_EV_DIR_RISING), - iio_get_time_ns()); - } - - old_fault = fault; - fault = ad5421_read(indio_dev, AD5421_REG_FAULT); - - /* still active? go to sleep for some time */ - if (fault & AD5421_FAULT_TRIGGER_IRQ) - msleep(1000); - - } while (fault & AD5421_FAULT_TRIGGER_IRQ); - - - return IRQ_HANDLED; -} - -static void ad5421_get_current_min_max(struct ad5421_state *st, - unsigned int *min, unsigned int *max) -{ - /* The current range is configured using external pins, which are - * usually hard-wired and not run-time switchable. */ - switch (st->current_range) { - case AD5421_CURRENT_RANGE_4mA_20mA: - *min = 4000; - *max = 20000; - break; - case AD5421_CURRENT_RANGE_3mA8_21mA: - *min = 3800; - *max = 21000; - break; - case AD5421_CURRENT_RANGE_3mA2_24mA: - *min = 3200; - *max = 24000; - break; - default: - *min = 0; - *max = 1; - break; - } -} - -static inline unsigned int ad5421_get_offset(struct ad5421_state *st) -{ - unsigned int min, max; - - ad5421_get_current_min_max(st, &min, &max); - return (min * (1 << 16)) / (max - min); -} - -static inline unsigned int ad5421_get_scale(struct ad5421_state *st) -{ - unsigned int min, max; - - ad5421_get_current_min_max(st, &min, &max); - return ((max - min) * 1000) / (1 << 16); -} - -static int ad5421_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int *val, int *val2, long m) -{ - struct ad5421_state *st = iio_priv(indio_dev); - int ret; - - if (chan->type != IIO_CURRENT) - return -EINVAL; - - switch (m) { - case IIO_CHAN_INFO_RAW: - ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA); - if (ret < 0) - return ret; - *val = ret; - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - *val = 0; - *val2 = ad5421_get_scale(st); - return IIO_VAL_INT_PLUS_MICRO; - case IIO_CHAN_INFO_OFFSET: - *val = ad5421_get_offset(st); - return IIO_VAL_INT; - case IIO_CHAN_INFO_CALIBBIAS: - ret = ad5421_read(indio_dev, AD5421_REG_OFFSET); - if (ret < 0) - return ret; - *val = ret - 32768; - return IIO_VAL_INT; - case IIO_CHAN_INFO_CALIBSCALE: - ret = ad5421_read(indio_dev, AD5421_REG_GAIN); - if (ret < 0) - return ret; - *val = ret; - return IIO_VAL_INT; - } - - return -EINVAL; -} - -static int ad5421_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int val, int val2, long mask) -{ - const unsigned int max_val = 1 << 16; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - if (val >= max_val || val < 0) - return -EINVAL; - - return ad5421_write(indio_dev, AD5421_REG_DAC_DATA, val); - case IIO_CHAN_INFO_CALIBBIAS: - val += 32768; - if (val >= max_val || val < 0) - return -EINVAL; - - return ad5421_write(indio_dev, AD5421_REG_OFFSET, val); - case IIO_CHAN_INFO_CALIBSCALE: - if (val >= max_val || val < 0) - return -EINVAL; - - return ad5421_write(indio_dev, AD5421_REG_GAIN, val); - default: - break; - } - - return -EINVAL; -} - -static int ad5421_write_event_config(struct iio_dev *indio_dev, - u64 event_code, int state) -{ - struct ad5421_state *st = iio_priv(indio_dev); - unsigned int mask; - - switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { - case IIO_CURRENT: - if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == - IIO_EV_DIR_RISING) - mask = AD5421_FAULT_OVER_CURRENT; - else - mask = AD5421_FAULT_UNDER_CURRENT; - break; - case IIO_TEMP: - mask = AD5421_FAULT_TEMP_OVER_140; - break; - default: - return -EINVAL; - } - - mutex_lock(&indio_dev->mlock); - if (state) - st->fault_mask |= mask; - else - st->fault_mask &= ~mask; - mutex_unlock(&indio_dev->mlock); - - return 0; -} - -static int ad5421_read_event_config(struct iio_dev *indio_dev, - u64 event_code) -{ - struct ad5421_state *st = iio_priv(indio_dev); - unsigned int mask; - - switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { - case IIO_CURRENT: - if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == - IIO_EV_DIR_RISING) - mask = AD5421_FAULT_OVER_CURRENT; - else - mask = AD5421_FAULT_UNDER_CURRENT; - break; - case IIO_TEMP: - mask = AD5421_FAULT_TEMP_OVER_140; - break; - default: - return -EINVAL; - } - - return (bool)(st->fault_mask & mask); -} - -static int ad5421_read_event_value(struct iio_dev *indio_dev, u64 event_code, - int *val) -{ - int ret; - - switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { - case IIO_CURRENT: - ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA); - if (ret < 0) - return ret; - *val = ret; - break; - case IIO_TEMP: - *val = 140000; - break; - default: - return -EINVAL; - } - - return 0; -} - -static const struct iio_info ad5421_info = { - .read_raw = ad5421_read_raw, - .write_raw = ad5421_write_raw, - .read_event_config = ad5421_read_event_config, - .write_event_config = ad5421_write_event_config, - .read_event_value = ad5421_read_event_value, - .driver_module = THIS_MODULE, -}; - -static int __devinit ad5421_probe(struct spi_device *spi) -{ - struct ad5421_platform_data *pdata = dev_get_platdata(&spi->dev); - struct iio_dev *indio_dev; - struct ad5421_state *st; - int ret; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - dev_err(&spi->dev, "Failed to allocate iio device\n"); - return -ENOMEM; - } - - st = iio_priv(indio_dev); - spi_set_drvdata(spi, indio_dev); - - st->spi = spi; - - indio_dev->dev.parent = &spi->dev; - indio_dev->name = "ad5421"; - indio_dev->info = &ad5421_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = ad5421_channels; - indio_dev->num_channels = ARRAY_SIZE(ad5421_channels); - - st->ctrl = AD5421_CTRL_WATCHDOG_DISABLE | - AD5421_CTRL_AUTO_FAULT_READBACK; - - if (pdata) { - st->current_range = pdata->current_range; - if (pdata->external_vref) - st->ctrl |= AD5421_CTRL_PWR_DOWN_INT_VREF; - } else { - st->current_range = AD5421_CURRENT_RANGE_4mA_20mA; - } - - /* write initial ctrl register value */ - ad5421_update_ctrl(indio_dev, 0, 0); - - if (spi->irq) { - ret = request_threaded_irq(spi->irq, - NULL, - ad5421_fault_handler, - IRQF_TRIGGER_HIGH | IRQF_ONESHOT, - "ad5421 fault", - indio_dev); - if (ret) - goto error_free; - } - - ret = iio_device_register(indio_dev); - if (ret) { - dev_err(&spi->dev, "Failed to register iio device: %d\n", ret); - goto error_free_irq; - } - - return 0; - -error_free_irq: - if (spi->irq) - free_irq(spi->irq, indio_dev); -error_free: - iio_device_free(indio_dev); - - return ret; -} - -static int __devexit ad5421_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - - iio_device_unregister(indio_dev); - if (spi->irq) - free_irq(spi->irq, indio_dev); - iio_device_free(indio_dev); - - return 0; -} - -static struct spi_driver ad5421_driver = { - .driver = { - .name = "ad5421", - .owner = THIS_MODULE, - }, - .probe = ad5421_probe, - .remove = __devexit_p(ad5421_remove), -}; -module_spi_driver(ad5421_driver); - -MODULE_AUTHOR("Lars-Peter Clausen "); -MODULE_DESCRIPTION("Analog Devices AD5421 DAC"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("spi:ad5421"); diff --git a/drivers/staging/iio/dac/ad5421.h b/drivers/staging/iio/dac/ad5421.h deleted file mode 100644 index cd2bb84ff1b0..000000000000 --- a/drivers/staging/iio/dac/ad5421.h +++ /dev/null @@ -1,32 +0,0 @@ -#ifndef __IIO_DAC_AD5421_H__ -#define __IIO_DAC_AD5421_H__ - -/* - * TODO: This file needs to go into include/linux/iio - */ - -/** - * enum ad5421_current_range - Current range the AD5421 is configured for. - * @AD5421_CURRENT_RANGE_4mA_20mA: 4 mA to 20 mA (RANGE1,0 pins = 00) - * @AD5421_CURRENT_RANGE_3mA8_21mA: 3.8 mA to 21 mA (RANGE1,0 pins = x1) - * @AD5421_CURRENT_RANGE_3mA2_24mA: 3.2 mA to 24 mA (RANGE1,0 pins = 10) - */ - -enum ad5421_current_range { - AD5421_CURRENT_RANGE_4mA_20mA, - AD5421_CURRENT_RANGE_3mA8_21mA, - AD5421_CURRENT_RANGE_3mA2_24mA, -}; - -/** - * struct ad5421_platform_data - AD5421 DAC driver platform data - * @external_vref: whether an external reference voltage is used or not - * @current_range: Current range the AD5421 is configured for - */ - -struct ad5421_platform_data { - bool external_vref; - enum ad5421_current_range current_range; -}; - -#endif diff --git a/drivers/staging/iio/dac/ad5446.c b/drivers/staging/iio/dac/ad5446.c deleted file mode 100644 index 49f557fc673b..000000000000 --- a/drivers/staging/iio/dac/ad5446.c +++ /dev/null @@ -1,381 +0,0 @@ -/* - * AD5446 SPI DAC driver - * - * Copyright 2010 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#include "ad5446.h" - -static int ad5446_write(struct ad5446_state *st, unsigned val) -{ - __be16 data = cpu_to_be16(val); - return spi_write(st->spi, &data, sizeof(data)); -} - -static int ad5660_write(struct ad5446_state *st, unsigned val) -{ - uint8_t data[3]; - - data[0] = (val >> 16) & 0xFF; - data[1] = (val >> 8) & 0xFF; - data[2] = val & 0xFF; - - return spi_write(st->spi, data, sizeof(data)); -} - -static const char * const ad5446_powerdown_modes[] = { - "1kohm_to_gnd", "100kohm_to_gnd", "three_state" -}; - -static int ad5446_set_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, unsigned int mode) -{ - struct ad5446_state *st = iio_priv(indio_dev); - - st->pwr_down_mode = mode + 1; - - return 0; -} - -static int ad5446_get_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan) -{ - struct ad5446_state *st = iio_priv(indio_dev); - - return st->pwr_down_mode - 1; -} - -static const struct iio_enum ad5446_powerdown_mode_enum = { - .items = ad5446_powerdown_modes, - .num_items = ARRAY_SIZE(ad5446_powerdown_modes), - .get = ad5446_get_powerdown_mode, - .set = ad5446_set_powerdown_mode, -}; - -static ssize_t ad5446_read_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, - const struct iio_chan_spec *chan, - char *buf) -{ - struct ad5446_state *st = iio_priv(indio_dev); - - return sprintf(buf, "%d\n", st->pwr_down); -} - -static ssize_t ad5446_write_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, - const struct iio_chan_spec *chan, - const char *buf, size_t len) -{ - struct ad5446_state *st = iio_priv(indio_dev); - unsigned int shift; - unsigned int val; - bool powerdown; - int ret; - - ret = strtobool(buf, &powerdown); - if (ret) - return ret; - - mutex_lock(&indio_dev->mlock); - st->pwr_down = powerdown; - - if (st->pwr_down) { - shift = chan->scan_type.realbits + chan->scan_type.shift; - val = st->pwr_down_mode << shift; - } else { - val = st->cached_val; - } - - ret = st->chip_info->write(st, val); - mutex_unlock(&indio_dev->mlock); - - return ret ? ret : len; -} - -static const struct iio_chan_spec_ext_info ad5064_ext_info_powerdown[] = { - { - .name = "powerdown", - .read = ad5446_read_dac_powerdown, - .write = ad5446_write_dac_powerdown, - }, - IIO_ENUM("powerdown_mode", false, &ad5446_powerdown_mode_enum), - IIO_ENUM_AVAILABLE("powerdown_mode", &ad5446_powerdown_mode_enum), - { }, -}; - -#define _AD5446_CHANNEL(bits, storage, shift, ext) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .channel = 0, \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SHARED_BIT, \ - .scan_type = IIO_ST('u', (bits), (storage), (shift)), \ - .ext_info = (ext), \ -} - -#define AD5446_CHANNEL(bits, storage, shift) \ - _AD5446_CHANNEL(bits, storage, shift, NULL) - -#define AD5446_CHANNEL_POWERDOWN(bits, storage, shift) \ - _AD5446_CHANNEL(bits, storage, shift, ad5064_ext_info_powerdown) - -static const struct ad5446_chip_info ad5446_chip_info_tbl[] = { - [ID_AD5444] = { - .channel = AD5446_CHANNEL(12, 16, 2), - .write = ad5446_write, - }, - [ID_AD5446] = { - .channel = AD5446_CHANNEL(14, 16, 0), - .write = ad5446_write, - }, - [ID_AD5541A] = { - .channel = AD5446_CHANNEL(16, 16, 0), - .write = ad5446_write, - }, - [ID_AD5512A] = { - .channel = AD5446_CHANNEL(12, 16, 4), - .write = ad5446_write, - }, - [ID_AD5553] = { - .channel = AD5446_CHANNEL(14, 16, 0), - .write = ad5446_write, - }, - [ID_AD5601] = { - .channel = AD5446_CHANNEL_POWERDOWN(8, 16, 6), - .write = ad5446_write, - }, - [ID_AD5611] = { - .channel = AD5446_CHANNEL_POWERDOWN(10, 16, 4), - .write = ad5446_write, - }, - [ID_AD5621] = { - .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), - .write = ad5446_write, - }, - [ID_AD5620_2500] = { - .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), - .int_vref_mv = 2500, - .write = ad5446_write, - }, - [ID_AD5620_1250] = { - .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2), - .int_vref_mv = 1250, - .write = ad5446_write, - }, - [ID_AD5640_2500] = { - .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0), - .int_vref_mv = 2500, - .write = ad5446_write, - }, - [ID_AD5640_1250] = { - .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0), - .int_vref_mv = 1250, - .write = ad5446_write, - }, - [ID_AD5660_2500] = { - .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), - .int_vref_mv = 2500, - .write = ad5660_write, - }, - [ID_AD5660_1250] = { - .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), - .int_vref_mv = 1250, - .write = ad5660_write, - }, - [ID_AD5662] = { - .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0), - .write = ad5660_write, - }, -}; - -static int ad5446_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long m) -{ - struct ad5446_state *st = iio_priv(indio_dev); - unsigned long scale_uv; - - switch (m) { - case IIO_CHAN_INFO_RAW: - *val = st->cached_val; - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; - *val = scale_uv / 1000; - *val2 = (scale_uv % 1000) * 1000; - return IIO_VAL_INT_PLUS_MICRO; - - } - return -EINVAL; -} - -static int ad5446_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, - int val2, - long mask) -{ - struct ad5446_state *st = iio_priv(indio_dev); - int ret = 0; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - if (val >= (1 << chan->scan_type.realbits) || val < 0) - return -EINVAL; - - val <<= chan->scan_type.shift; - mutex_lock(&indio_dev->mlock); - st->cached_val = val; - if (!st->pwr_down) - ret = st->chip_info->write(st, val); - mutex_unlock(&indio_dev->mlock); - break; - default: - ret = -EINVAL; - } - - return ret; -} - -static const struct iio_info ad5446_info = { - .read_raw = ad5446_read_raw, - .write_raw = ad5446_write_raw, - .driver_module = THIS_MODULE, -}; - -static int __devinit ad5446_probe(struct spi_device *spi) -{ - struct ad5446_state *st; - struct iio_dev *indio_dev; - struct regulator *reg; - int ret, voltage_uv = 0; - - reg = regulator_get(&spi->dev, "vcc"); - if (!IS_ERR(reg)) { - ret = regulator_enable(reg); - if (ret) - goto error_put_reg; - - voltage_uv = regulator_get_voltage(reg); - } - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - ret = -ENOMEM; - goto error_disable_reg; - } - st = iio_priv(indio_dev); - st->chip_info = - &ad5446_chip_info_tbl[spi_get_device_id(spi)->driver_data]; - - spi_set_drvdata(spi, indio_dev); - st->reg = reg; - st->spi = spi; - - /* Establish that the iio_dev is a child of the spi device */ - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(spi)->name; - indio_dev->info = &ad5446_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = &st->chip_info->channel; - indio_dev->num_channels = 1; - - st->pwr_down_mode = MODE_PWRDWN_1k; - - if (st->chip_info->int_vref_mv) - st->vref_mv = st->chip_info->int_vref_mv; - else if (voltage_uv) - st->vref_mv = voltage_uv / 1000; - else - dev_warn(&spi->dev, "reference voltage unspecified\n"); - - ret = iio_device_register(indio_dev); - if (ret) - goto error_free_device; - - return 0; - -error_free_device: - iio_device_free(indio_dev); -error_disable_reg: - if (!IS_ERR(reg)) - regulator_disable(reg); -error_put_reg: - if (!IS_ERR(reg)) - regulator_put(reg); - - return ret; -} - -static int ad5446_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct ad5446_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - if (!IS_ERR(st->reg)) { - regulator_disable(st->reg); - regulator_put(st->reg); - } - iio_device_free(indio_dev); - - return 0; -} - -static const struct spi_device_id ad5446_id[] = { - {"ad5444", ID_AD5444}, - {"ad5446", ID_AD5446}, - {"ad5512a", ID_AD5512A}, - {"ad5541a", ID_AD5541A}, - {"ad5542a", ID_AD5541A}, /* ad5541a and ad5542a are compatible */ - {"ad5543", ID_AD5541A}, /* ad5541a and ad5543 are compatible */ - {"ad5553", ID_AD5553}, - {"ad5601", ID_AD5601}, - {"ad5611", ID_AD5611}, - {"ad5621", ID_AD5621}, - {"ad5620-2500", ID_AD5620_2500}, /* AD5620/40/60: */ - {"ad5620-1250", ID_AD5620_1250}, /* part numbers may look differently */ - {"ad5640-2500", ID_AD5640_2500}, - {"ad5640-1250", ID_AD5640_1250}, - {"ad5660-2500", ID_AD5660_2500}, - {"ad5660-1250", ID_AD5660_1250}, - {"ad5662", ID_AD5662}, - {} -}; -MODULE_DEVICE_TABLE(spi, ad5446_id); - -static struct spi_driver ad5446_driver = { - .driver = { - .name = "ad5446", - .owner = THIS_MODULE, - }, - .probe = ad5446_probe, - .remove = __devexit_p(ad5446_remove), - .id_table = ad5446_id, -}; -module_spi_driver(ad5446_driver); - -MODULE_AUTHOR("Michael Hennerich "); -MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5446.h b/drivers/staging/iio/dac/ad5446.h deleted file mode 100644 index dfd68ce7427e..000000000000 --- a/drivers/staging/iio/dac/ad5446.h +++ /dev/null @@ -1,89 +0,0 @@ -/* - * AD5446 SPI DAC driver - * - * Copyright 2010 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ -#ifndef IIO_DAC_AD5446_H_ -#define IIO_DAC_AD5446_H_ - -/* DAC Control Bits */ - -#define AD5446_LOAD (0x0 << 14) /* Load and update */ -#define AD5446_SDO_DIS (0x1 << 14) /* Disable SDO */ -#define AD5446_NOP (0x2 << 14) /* No operation */ -#define AD5446_CLK_RISING (0x3 << 14) /* Clock data on rising edge */ - -#define AD5620_LOAD (0x0 << 14) /* Load and update Norm Operation*/ -#define AD5620_PWRDWN_1k (0x1 << 14) /* Power-down: 1kOhm to GND */ -#define AD5620_PWRDWN_100k (0x2 << 14) /* Power-down: 100kOhm to GND */ -#define AD5620_PWRDWN_TRISTATE (0x3 << 14) /* Power-down: Three-state */ - -#define AD5660_LOAD (0x0 << 16) /* Load and update Norm Operation*/ -#define AD5660_PWRDWN_1k (0x1 << 16) /* Power-down: 1kOhm to GND */ -#define AD5660_PWRDWN_100k (0x2 << 16) /* Power-down: 100kOhm to GND */ -#define AD5660_PWRDWN_TRISTATE (0x3 << 16) /* Power-down: Three-state */ - -#define MODE_PWRDWN_1k 0x1 -#define MODE_PWRDWN_100k 0x2 -#define MODE_PWRDWN_TRISTATE 0x3 - -/** - * struct ad5446_state - driver instance specific data - * @spi: spi_device - * @chip_info: chip model specific constants, available modes etc - * @reg: supply regulator - * @vref_mv: actual reference voltage used - */ - -struct ad5446_state { - struct spi_device *spi; - const struct ad5446_chip_info *chip_info; - struct regulator *reg; - unsigned short vref_mv; - unsigned cached_val; - unsigned pwr_down_mode; - unsigned pwr_down; -}; - -/** - * struct ad5446_chip_info - chip specific information - * @channel: channel spec for the DAC - * @int_vref_mv: AD5620/40/60: the internal reference voltage - * @write: chip specific helper function to write to the register - */ - -struct ad5446_chip_info { - struct iio_chan_spec channel; - u16 int_vref_mv; - int (*write)(struct ad5446_state *st, unsigned val); -}; - -/** - * ad5446_supported_device_ids: - * The AD5620/40/60 parts are available in different fixed internal reference - * voltage options. The actual part numbers may look differently - * (and a bit cryptic), however this style is used to make clear which - * parts are supported here. - */ - -enum ad5446_supported_device_ids { - ID_AD5444, - ID_AD5446, - ID_AD5541A, - ID_AD5512A, - ID_AD5553, - ID_AD5601, - ID_AD5611, - ID_AD5621, - ID_AD5620_2500, - ID_AD5620_1250, - ID_AD5640_2500, - ID_AD5640_1250, - ID_AD5660_2500, - ID_AD5660_1250, - ID_AD5662, -}; - -#endif /* IIO_DAC_AD5446_H_ */ diff --git a/drivers/staging/iio/dac/ad5504.c b/drivers/staging/iio/dac/ad5504.c deleted file mode 100644 index 1289e9bc1688..000000000000 --- a/drivers/staging/iio/dac/ad5504.c +++ /dev/null @@ -1,394 +0,0 @@ -/* - * AD5504, AD5501 High Voltage Digital to Analog Converter - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#include "ad5504.h" - -#define AD5505_BITS 12 -#define AD5504_RES_MASK ((1 << (AD5505_BITS)) - 1) - -#define AD5504_CMD_READ (1 << 15) -#define AD5504_CMD_WRITE (0 << 15) -#define AD5504_ADDR(addr) ((addr) << 12) - -/* Registers */ -#define AD5504_ADDR_NOOP 0 -#define AD5504_ADDR_DAC(x) ((x) + 1) -#define AD5504_ADDR_ALL_DAC 5 -#define AD5504_ADDR_CTRL 7 - -/* Control Register */ -#define AD5504_DAC_PWR(ch) ((ch) << 2) -#define AD5504_DAC_PWRDWN_MODE(mode) ((mode) << 6) -#define AD5504_DAC_PWRDN_20K 0 -#define AD5504_DAC_PWRDN_3STATE 1 - -/** - * struct ad5446_state - driver instance specific data - * @us: spi_device - * @reg: supply regulator - * @vref_mv: actual reference voltage used - * @pwr_down_mask power down mask - * @pwr_down_mode current power down mode - */ - -struct ad5504_state { - struct spi_device *spi; - struct regulator *reg; - unsigned short vref_mv; - unsigned pwr_down_mask; - unsigned pwr_down_mode; -}; - -/** - * ad5504_supported_device_ids: - */ - -enum ad5504_supported_device_ids { - ID_AD5504, - ID_AD5501, -}; - -static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val) -{ - u16 tmp = cpu_to_be16(AD5504_CMD_WRITE | - AD5504_ADDR(addr) | - (val & AD5504_RES_MASK)); - - return spi_write(spi, (u8 *)&tmp, 2); -} - -static int ad5504_spi_read(struct spi_device *spi, u8 addr) -{ - u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr)); - u16 val; - int ret; - struct spi_transfer t = { - .tx_buf = &tmp, - .rx_buf = &val, - .len = 2, - }; - struct spi_message m; - - spi_message_init(&m); - spi_message_add_tail(&t, &m); - ret = spi_sync(spi, &m); - - if (ret < 0) - return ret; - - return be16_to_cpu(val) & AD5504_RES_MASK; -} - -static int ad5504_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long m) -{ - struct ad5504_state *st = iio_priv(indio_dev); - unsigned long scale_uv; - int ret; - - switch (m) { - case IIO_CHAN_INFO_RAW: - ret = ad5504_spi_read(st->spi, chan->address); - if (ret < 0) - return ret; - - *val = ret; - - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; - *val = scale_uv / 1000; - *val2 = (scale_uv % 1000) * 1000; - return IIO_VAL_INT_PLUS_MICRO; - - } - return -EINVAL; -} - -static int ad5504_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, - int val2, - long mask) -{ - struct ad5504_state *st = iio_priv(indio_dev); - int ret; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - if (val >= (1 << chan->scan_type.realbits) || val < 0) - return -EINVAL; - - return ad5504_spi_write(st->spi, chan->address, val); - default: - ret = -EINVAL; - } - - return -EINVAL; -} - -static const char * const ad5504_powerdown_modes[] = { - "20kohm_to_gnd", - "three_state", -}; - -static int ad5504_get_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan) -{ - struct ad5504_state *st = iio_priv(indio_dev); - - return st->pwr_down_mode; -} - -static int ad5504_set_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, unsigned int mode) -{ - struct ad5504_state *st = iio_priv(indio_dev); - - st->pwr_down_mode = mode; - - return 0; -} - -static const struct iio_enum ad5504_powerdown_mode_enum = { - .items = ad5504_powerdown_modes, - .num_items = ARRAY_SIZE(ad5504_powerdown_modes), - .get = ad5504_get_powerdown_mode, - .set = ad5504_set_powerdown_mode, -}; - -static ssize_t ad5504_read_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, char *buf) -{ - struct ad5504_state *st = iio_priv(indio_dev); - - return sprintf(buf, "%d\n", - !(st->pwr_down_mask & (1 << chan->channel))); -} - -static ssize_t ad5504_write_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, const char *buf, - size_t len) -{ - bool pwr_down; - int ret; - struct ad5504_state *st = iio_priv(indio_dev); - - ret = strtobool(buf, &pwr_down); - if (ret) - return ret; - - if (pwr_down) - st->pwr_down_mask |= (1 << chan->channel); - else - st->pwr_down_mask &= ~(1 << chan->channel); - - ret = ad5504_spi_write(st->spi, AD5504_ADDR_CTRL, - AD5504_DAC_PWRDWN_MODE(st->pwr_down_mode) | - AD5504_DAC_PWR(st->pwr_down_mask)); - - /* writes to the CTRL register must be followed by a NOOP */ - ad5504_spi_write(st->spi, AD5504_ADDR_NOOP, 0); - - return ret ? ret : len; -} - -static IIO_CONST_ATTR(temp0_thresh_rising_value, "110000"); -static IIO_CONST_ATTR(temp0_thresh_rising_en, "1"); - -static struct attribute *ad5504_ev_attributes[] = { - &iio_const_attr_temp0_thresh_rising_value.dev_attr.attr, - &iio_const_attr_temp0_thresh_rising_en.dev_attr.attr, - NULL, -}; - -static struct attribute_group ad5504_ev_attribute_group = { - .attrs = ad5504_ev_attributes, - .name = "events", -}; - -static irqreturn_t ad5504_event_handler(int irq, void *private) -{ - iio_push_event(private, - IIO_UNMOD_EVENT_CODE(IIO_TEMP, - 0, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_RISING), - iio_get_time_ns()); - - return IRQ_HANDLED; -} - -static const struct iio_info ad5504_info = { - .write_raw = ad5504_write_raw, - .read_raw = ad5504_read_raw, - .event_attrs = &ad5504_ev_attribute_group, - .driver_module = THIS_MODULE, -}; - -static const struct iio_chan_spec_ext_info ad5504_ext_info[] = { - { - .name = "powerdown", - .read = ad5504_read_dac_powerdown, - .write = ad5504_write_dac_powerdown, - }, - IIO_ENUM("powerdown_mode", true, &ad5504_powerdown_mode_enum), - IIO_ENUM_AVAILABLE("powerdown_mode", &ad5504_powerdown_mode_enum), - { }, -}; - -#define AD5504_CHANNEL(_chan) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .channel = (_chan), \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SHARED_BIT, \ - .address = AD5504_ADDR_DAC(_chan), \ - .scan_type = IIO_ST('u', 12, 16, 0), \ - .ext_info = ad5504_ext_info, \ -} - -static const struct iio_chan_spec ad5504_channels[] = { - AD5504_CHANNEL(0), - AD5504_CHANNEL(1), - AD5504_CHANNEL(2), - AD5504_CHANNEL(3), -}; - -static int __devinit ad5504_probe(struct spi_device *spi) -{ - struct ad5504_platform_data *pdata = spi->dev.platform_data; - struct iio_dev *indio_dev; - struct ad5504_state *st; - struct regulator *reg; - int ret, voltage_uv = 0; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - ret = -ENOMEM; - goto error_ret; - } - reg = regulator_get(&spi->dev, "vcc"); - if (!IS_ERR(reg)) { - ret = regulator_enable(reg); - if (ret) - goto error_put_reg; - - voltage_uv = regulator_get_voltage(reg); - } - - spi_set_drvdata(spi, indio_dev); - st = iio_priv(indio_dev); - if (voltage_uv) - st->vref_mv = voltage_uv / 1000; - else if (pdata) - st->vref_mv = pdata->vref_mv; - else - dev_warn(&spi->dev, "reference voltage unspecified\n"); - - st->reg = reg; - st->spi = spi; - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(st->spi)->name; - indio_dev->info = &ad5504_info; - if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) - indio_dev->num_channels = 1; - else - indio_dev->num_channels = 4; - indio_dev->channels = ad5504_channels; - indio_dev->modes = INDIO_DIRECT_MODE; - - if (spi->irq) { - ret = request_threaded_irq(spi->irq, - NULL, - &ad5504_event_handler, - IRQF_TRIGGER_FALLING | IRQF_ONESHOT, - spi_get_device_id(st->spi)->name, - indio_dev); - if (ret) - goto error_disable_reg; - } - - ret = iio_device_register(indio_dev); - if (ret) - goto error_free_irq; - - return 0; - -error_free_irq: - if (spi->irq) - free_irq(spi->irq, indio_dev); -error_disable_reg: - if (!IS_ERR(reg)) - regulator_disable(reg); -error_put_reg: - if (!IS_ERR(reg)) - regulator_put(reg); - - iio_device_free(indio_dev); -error_ret: - return ret; -} - -static int __devexit ad5504_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct ad5504_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - if (spi->irq) - free_irq(spi->irq, indio_dev); - - if (!IS_ERR(st->reg)) { - regulator_disable(st->reg); - regulator_put(st->reg); - } - iio_device_free(indio_dev); - - return 0; -} - -static const struct spi_device_id ad5504_id[] = { - {"ad5504", ID_AD5504}, - {"ad5501", ID_AD5501}, - {} -}; -MODULE_DEVICE_TABLE(spi, ad5504_id); - -static struct spi_driver ad5504_driver = { - .driver = { - .name = "ad5504", - .owner = THIS_MODULE, - }, - .probe = ad5504_probe, - .remove = __devexit_p(ad5504_remove), - .id_table = ad5504_id, -}; -module_spi_driver(ad5504_driver); - -MODULE_AUTHOR("Michael Hennerich "); -MODULE_DESCRIPTION("Analog Devices AD5501/AD5501 DAC"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5504.h b/drivers/staging/iio/dac/ad5504.h deleted file mode 100644 index d4980bf688bf..000000000000 --- a/drivers/staging/iio/dac/ad5504.h +++ /dev/null @@ -1,20 +0,0 @@ -/* - * AD5504 SPI DAC driver - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#ifndef SPI_AD5504_H_ -#define SPI_AD5504_H_ - -/* - * TODO: struct ad5504_platform_data needs to go into include/linux/iio - */ - -struct ad5504_platform_data { - u16 vref_mv; -}; - -#endif /* SPI_AD5504_H_ */ diff --git a/drivers/staging/iio/dac/ad5624r.h b/drivers/staging/iio/dac/ad5624r.h deleted file mode 100644 index 5dca3028cdfd..000000000000 --- a/drivers/staging/iio/dac/ad5624r.h +++ /dev/null @@ -1,79 +0,0 @@ -/* - * AD5624R SPI DAC driver - * - * Copyright 2010-2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ -#ifndef SPI_AD5624R_H_ -#define SPI_AD5624R_H_ - -#define AD5624R_DAC_CHANNELS 4 - -#define AD5624R_ADDR_DAC0 0x0 -#define AD5624R_ADDR_DAC1 0x1 -#define AD5624R_ADDR_DAC2 0x2 -#define AD5624R_ADDR_DAC3 0x3 -#define AD5624R_ADDR_ALL_DAC 0x7 - -#define AD5624R_CMD_WRITE_INPUT_N 0x0 -#define AD5624R_CMD_UPDATE_DAC_N 0x1 -#define AD5624R_CMD_WRITE_INPUT_N_UPDATE_ALL 0x2 -#define AD5624R_CMD_WRITE_INPUT_N_UPDATE_N 0x3 -#define AD5624R_CMD_POWERDOWN_DAC 0x4 -#define AD5624R_CMD_RESET 0x5 -#define AD5624R_CMD_LDAC_SETUP 0x6 -#define AD5624R_CMD_INTERNAL_REFER_SETUP 0x7 - -#define AD5624R_LDAC_PWRDN_NONE 0x0 -#define AD5624R_LDAC_PWRDN_1K 0x1 -#define AD5624R_LDAC_PWRDN_100K 0x2 -#define AD5624R_LDAC_PWRDN_3STATE 0x3 - -/** - * struct ad5624r_chip_info - chip specific information - * @channels: channel spec for the DAC - * @int_vref_mv: AD5620/40/60: the internal reference voltage - */ - -struct ad5624r_chip_info { - const struct iio_chan_spec *channels; - u16 int_vref_mv; -}; - -/** - * struct ad5446_state - driver instance specific data - * @indio_dev: the industrial I/O device - * @us: spi_device - * @chip_info: chip model specific constants, available modes etc - * @reg: supply regulator - * @vref_mv: actual reference voltage used - * @pwr_down_mask power down mask - * @pwr_down_mode current power down mode - */ - -struct ad5624r_state { - struct spi_device *us; - const struct ad5624r_chip_info *chip_info; - struct regulator *reg; - unsigned short vref_mv; - unsigned pwr_down_mask; - unsigned pwr_down_mode; -}; - -/** - * ad5624r_supported_device_ids: - * The AD5624/44/64 parts are available in different - * fixed internal reference voltage options. - */ - -enum ad5624r_supported_device_ids { - ID_AD5624R3, - ID_AD5644R3, - ID_AD5664R3, - ID_AD5624R5, - ID_AD5644R5, - ID_AD5664R5, -}; - -#endif /* SPI_AD5624R_H_ */ diff --git a/drivers/staging/iio/dac/ad5624r_spi.c b/drivers/staging/iio/dac/ad5624r_spi.c deleted file mode 100644 index 6a7d6a48cc6d..000000000000 --- a/drivers/staging/iio/dac/ad5624r_spi.c +++ /dev/null @@ -1,324 +0,0 @@ -/* - * AD5624R, AD5644R, AD5664R Digital to analog convertors spi driver - * - * Copyright 2010-2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#include "ad5624r.h" - -static int ad5624r_spi_write(struct spi_device *spi, - u8 cmd, u8 addr, u16 val, u8 len) -{ - u32 data; - u8 msg[3]; - - /* - * The input shift register is 24 bits wide. The first two bits are - * don't care bits. The next three are the command bits, C2 to C0, - * followed by the 3-bit DAC address, A2 to A0, and then the - * 16-, 14-, 12-bit data-word. The data-word comprises the 16-, - * 14-, 12-bit input code followed by 0, 2, or 4 don't care bits, - * for the AD5664R, AD5644R, and AD5624R, respectively. - */ - data = (0 << 22) | (cmd << 19) | (addr << 16) | (val << (16 - len)); - msg[0] = data >> 16; - msg[1] = data >> 8; - msg[2] = data; - - return spi_write(spi, msg, 3); -} - -static int ad5624r_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long m) -{ - struct ad5624r_state *st = iio_priv(indio_dev); - unsigned long scale_uv; - - switch (m) { - case IIO_CHAN_INFO_SCALE: - scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; - *val = scale_uv / 1000; - *val2 = (scale_uv % 1000) * 1000; - return IIO_VAL_INT_PLUS_MICRO; - - } - return -EINVAL; -} - -static int ad5624r_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, - int val2, - long mask) -{ - struct ad5624r_state *st = iio_priv(indio_dev); - int ret; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - if (val >= (1 << chan->scan_type.realbits) || val < 0) - return -EINVAL; - - return ad5624r_spi_write(st->us, - AD5624R_CMD_WRITE_INPUT_N_UPDATE_N, - chan->address, val, - chan->scan_type.shift); - default: - ret = -EINVAL; - } - - return -EINVAL; -} - -static const char * const ad5624r_powerdown_modes[] = { - "1kohm_to_gnd", - "100kohm_to_gnd", - "three_state" -}; - -static int ad5624r_get_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan) -{ - struct ad5624r_state *st = iio_priv(indio_dev); - - return st->pwr_down_mode; -} - -static int ad5624r_set_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, unsigned int mode) -{ - struct ad5624r_state *st = iio_priv(indio_dev); - - st->pwr_down_mode = mode; - - return 0; -} - -static const struct iio_enum ad5624r_powerdown_mode_enum = { - .items = ad5624r_powerdown_modes, - .num_items = ARRAY_SIZE(ad5624r_powerdown_modes), - .get = ad5624r_get_powerdown_mode, - .set = ad5624r_set_powerdown_mode, -}; - -static ssize_t ad5624r_read_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, char *buf) -{ - struct ad5624r_state *st = iio_priv(indio_dev); - - return sprintf(buf, "%d\n", - !!(st->pwr_down_mask & (1 << chan->channel))); -} - -static ssize_t ad5624r_write_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, const char *buf, - size_t len) -{ - bool pwr_down; - int ret; - struct ad5624r_state *st = iio_priv(indio_dev); - - ret = strtobool(buf, &pwr_down); - if (ret) - return ret; - - if (pwr_down) - st->pwr_down_mask |= (1 << chan->channel); - else - st->pwr_down_mask &= ~(1 << chan->channel); - - ret = ad5624r_spi_write(st->us, AD5624R_CMD_POWERDOWN_DAC, 0, - (st->pwr_down_mode << 4) | - st->pwr_down_mask, 16); - - return ret ? ret : len; -} - -static const struct iio_info ad5624r_info = { - .write_raw = ad5624r_write_raw, - .read_raw = ad5624r_read_raw, - .driver_module = THIS_MODULE, -}; - -static const struct iio_chan_spec_ext_info ad5624r_ext_info[] = { - { - .name = "powerdown", - .read = ad5624r_read_dac_powerdown, - .write = ad5624r_write_dac_powerdown, - }, - IIO_ENUM("powerdown_mode", true, &ad5624r_powerdown_mode_enum), - IIO_ENUM_AVAILABLE("powerdown_mode", &ad5624r_powerdown_mode_enum), - { }, -}; - -#define AD5624R_CHANNEL(_chan, _bits) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .channel = (_chan), \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SHARED_BIT, \ - .address = (_chan), \ - .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \ - .ext_info = ad5624r_ext_info, \ -} - -#define DECLARE_AD5624R_CHANNELS(_name, _bits) \ - const struct iio_chan_spec _name##_channels[] = { \ - AD5624R_CHANNEL(0, _bits), \ - AD5624R_CHANNEL(1, _bits), \ - AD5624R_CHANNEL(2, _bits), \ - AD5624R_CHANNEL(3, _bits), \ -} - -static DECLARE_AD5624R_CHANNELS(ad5624r, 12); -static DECLARE_AD5624R_CHANNELS(ad5644r, 14); -static DECLARE_AD5624R_CHANNELS(ad5664r, 16); - -static const struct ad5624r_chip_info ad5624r_chip_info_tbl[] = { - [ID_AD5624R3] = { - .channels = ad5624r_channels, - .int_vref_mv = 1250, - }, - [ID_AD5624R5] = { - .channels = ad5624r_channels, - .int_vref_mv = 2500, - }, - [ID_AD5644R3] = { - .channels = ad5644r_channels, - .int_vref_mv = 1250, - }, - [ID_AD5644R5] = { - .channels = ad5644r_channels, - .int_vref_mv = 2500, - }, - [ID_AD5664R3] = { - .channels = ad5664r_channels, - .int_vref_mv = 1250, - }, - [ID_AD5664R5] = { - .channels = ad5664r_channels, - .int_vref_mv = 2500, - }, -}; - -static int __devinit ad5624r_probe(struct spi_device *spi) -{ - struct ad5624r_state *st; - struct iio_dev *indio_dev; - int ret, voltage_uv = 0; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - ret = -ENOMEM; - goto error_ret; - } - st = iio_priv(indio_dev); - st->reg = regulator_get(&spi->dev, "vcc"); - if (!IS_ERR(st->reg)) { - ret = regulator_enable(st->reg); - if (ret) - goto error_put_reg; - - voltage_uv = regulator_get_voltage(st->reg); - } - - spi_set_drvdata(spi, indio_dev); - st->chip_info = - &ad5624r_chip_info_tbl[spi_get_device_id(spi)->driver_data]; - - if (voltage_uv) - st->vref_mv = voltage_uv / 1000; - else - st->vref_mv = st->chip_info->int_vref_mv; - - st->us = spi; - - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(spi)->name; - indio_dev->info = &ad5624r_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = st->chip_info->channels; - indio_dev->num_channels = AD5624R_DAC_CHANNELS; - - ret = ad5624r_spi_write(spi, AD5624R_CMD_INTERNAL_REFER_SETUP, 0, - !!voltage_uv, 16); - if (ret) - goto error_disable_reg; - - ret = iio_device_register(indio_dev); - if (ret) - goto error_disable_reg; - - return 0; - -error_disable_reg: - if (!IS_ERR(st->reg)) - regulator_disable(st->reg); -error_put_reg: - if (!IS_ERR(st->reg)) - regulator_put(st->reg); - iio_device_free(indio_dev); -error_ret: - - return ret; -} - -static int __devexit ad5624r_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct ad5624r_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - if (!IS_ERR(st->reg)) { - regulator_disable(st->reg); - regulator_put(st->reg); - } - iio_device_free(indio_dev); - - return 0; -} - -static const struct spi_device_id ad5624r_id[] = { - {"ad5624r3", ID_AD5624R3}, - {"ad5644r3", ID_AD5644R3}, - {"ad5664r3", ID_AD5664R3}, - {"ad5624r5", ID_AD5624R5}, - {"ad5644r5", ID_AD5644R5}, - {"ad5664r5", ID_AD5664R5}, - {} -}; -MODULE_DEVICE_TABLE(spi, ad5624r_id); - -static struct spi_driver ad5624r_driver = { - .driver = { - .name = "ad5624r", - .owner = THIS_MODULE, - }, - .probe = ad5624r_probe, - .remove = __devexit_p(ad5624r_remove), - .id_table = ad5624r_id, -}; -module_spi_driver(ad5624r_driver); - -MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices AD5624/44/64R DAC spi driver"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5686.c b/drivers/staging/iio/dac/ad5686.c deleted file mode 100644 index 6948d75e1036..000000000000 --- a/drivers/staging/iio/dac/ad5686.c +++ /dev/null @@ -1,418 +0,0 @@ -/* - * AD5686R, AD5685R, AD5684R Digital to analog converters driver - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define AD5686_DAC_CHANNELS 4 - -#define AD5686_ADDR(x) ((x) << 16) -#define AD5686_CMD(x) ((x) << 20) - -#define AD5686_ADDR_DAC(chan) (0x1 << (chan)) -#define AD5686_ADDR_ALL_DAC 0xF - -#define AD5686_CMD_NOOP 0x0 -#define AD5686_CMD_WRITE_INPUT_N 0x1 -#define AD5686_CMD_UPDATE_DAC_N 0x2 -#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3 -#define AD5686_CMD_POWERDOWN_DAC 0x4 -#define AD5686_CMD_LDAC_MASK 0x5 -#define AD5686_CMD_RESET 0x6 -#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7 -#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8 -#define AD5686_CMD_READBACK_ENABLE 0x9 - -#define AD5686_LDAC_PWRDN_NONE 0x0 -#define AD5686_LDAC_PWRDN_1K 0x1 -#define AD5686_LDAC_PWRDN_100K 0x2 -#define AD5686_LDAC_PWRDN_3STATE 0x3 - -/** - * struct ad5686_chip_info - chip specific information - * @int_vref_mv: AD5620/40/60: the internal reference voltage - * @channel: channel specification -*/ - -struct ad5686_chip_info { - u16 int_vref_mv; - struct iio_chan_spec channel[AD5686_DAC_CHANNELS]; -}; - -/** - * struct ad5446_state - driver instance specific data - * @spi: spi_device - * @chip_info: chip model specific constants, available modes etc - * @reg: supply regulator - * @vref_mv: actual reference voltage used - * @pwr_down_mask: power down mask - * @pwr_down_mode: current power down mode - * @data: spi transfer buffers - */ - -struct ad5686_state { - struct spi_device *spi; - const struct ad5686_chip_info *chip_info; - struct regulator *reg; - unsigned short vref_mv; - unsigned pwr_down_mask; - unsigned pwr_down_mode; - /* - * DMA (thus cache coherency maintenance) requires the - * transfer buffers to live in their own cache lines. - */ - - union { - u32 d32; - u8 d8[4]; - } data[3] ____cacheline_aligned; -}; - -/** - * ad5686_supported_device_ids: - */ - -enum ad5686_supported_device_ids { - ID_AD5684, - ID_AD5685, - ID_AD5686, -}; -static int ad5686_spi_write(struct ad5686_state *st, - u8 cmd, u8 addr, u16 val, u8 shift) -{ - val <<= shift; - - st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | - AD5686_ADDR(addr) | - val); - - return spi_write(st->spi, &st->data[0].d8[1], 3); -} - -static int ad5686_spi_read(struct ad5686_state *st, u8 addr) -{ - struct spi_transfer t[] = { - { - .tx_buf = &st->data[0].d8[1], - .len = 3, - .cs_change = 1, - }, { - .tx_buf = &st->data[1].d8[1], - .rx_buf = &st->data[2].d8[1], - .len = 3, - }, - }; - struct spi_message m; - int ret; - - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - - st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) | - AD5686_ADDR(addr)); - st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); - - ret = spi_sync(st->spi, &m); - if (ret < 0) - return ret; - - return be32_to_cpu(st->data[2].d32); -} - -static const char * const ad5686_powerdown_modes[] = { - "1kohm_to_gnd", - "100kohm_to_gnd", - "three_state" -}; - -static int ad5686_get_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan) -{ - struct ad5686_state *st = iio_priv(indio_dev); - - return ((st->pwr_down_mode >> (chan->channel * 2)) & 0x3) - 1; -} - -static int ad5686_set_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, unsigned int mode) -{ - struct ad5686_state *st = iio_priv(indio_dev); - - st->pwr_down_mode &= ~(0x3 << (chan->channel * 2)); - st->pwr_down_mode |= ((mode + 1) << (chan->channel * 2)); - - return 0; -} - -static const struct iio_enum ad5686_powerdown_mode_enum = { - .items = ad5686_powerdown_modes, - .num_items = ARRAY_SIZE(ad5686_powerdown_modes), - .get = ad5686_get_powerdown_mode, - .set = ad5686_set_powerdown_mode, -}; - -static ssize_t ad5686_read_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, char *buf) -{ - struct ad5686_state *st = iio_priv(indio_dev); - - return sprintf(buf, "%d\n", !!(st->pwr_down_mask & - (0x3 << (chan->channel * 2)))); -} - -static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, const char *buf, - size_t len) -{ - bool readin; - int ret; - struct ad5686_state *st = iio_priv(indio_dev); - - ret = strtobool(buf, &readin); - if (ret) - return ret; - - if (readin == true) - st->pwr_down_mask |= (0x3 << (chan->channel * 2)); - else - st->pwr_down_mask &= ~(0x3 << (chan->channel * 2)); - - ret = ad5686_spi_write(st, AD5686_CMD_POWERDOWN_DAC, 0, - st->pwr_down_mask & st->pwr_down_mode, 0); - - return ret ? ret : len; -} - -static int ad5686_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long m) -{ - struct ad5686_state *st = iio_priv(indio_dev); - unsigned long scale_uv; - int ret; - - switch (m) { - case IIO_CHAN_INFO_RAW: - mutex_lock(&indio_dev->mlock); - ret = ad5686_spi_read(st, chan->address); - mutex_unlock(&indio_dev->mlock); - if (ret < 0) - return ret; - *val = ret; - return IIO_VAL_INT; - break; - case IIO_CHAN_INFO_SCALE: - scale_uv = (st->vref_mv * 100000) - >> (chan->scan_type.realbits); - *val = scale_uv / 100000; - *val2 = (scale_uv % 100000) * 10; - return IIO_VAL_INT_PLUS_MICRO; - - } - return -EINVAL; -} - -static int ad5686_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, - int val2, - long mask) -{ - struct ad5686_state *st = iio_priv(indio_dev); - int ret; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - if (val > (1 << chan->scan_type.realbits) || val < 0) - return -EINVAL; - - mutex_lock(&indio_dev->mlock); - ret = ad5686_spi_write(st, - AD5686_CMD_WRITE_INPUT_N_UPDATE_N, - chan->address, - val, - chan->scan_type.shift); - mutex_unlock(&indio_dev->mlock); - break; - default: - ret = -EINVAL; - } - - return ret; -} - -static const struct iio_info ad5686_info = { - .read_raw = ad5686_read_raw, - .write_raw = ad5686_write_raw, - .driver_module = THIS_MODULE, -}; - -static const struct iio_chan_spec_ext_info ad5686_ext_info[] = { - { - .name = "powerdown", - .read = ad5686_read_dac_powerdown, - .write = ad5686_write_dac_powerdown, - }, - IIO_ENUM("powerdown_mode", false, &ad5686_powerdown_mode_enum), - IIO_ENUM_AVAILABLE("powerdown_mode", &ad5686_powerdown_mode_enum), - { }, -}; - -#define AD5868_CHANNEL(chan, bits, shift) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .channel = chan, \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SHARED_BIT, \ - .address = AD5686_ADDR_DAC(chan), \ - .scan_type = IIO_ST('u', bits, 16, shift), \ - .ext_info = ad5686_ext_info, \ -} - -static const struct ad5686_chip_info ad5686_chip_info_tbl[] = { - [ID_AD5684] = { - .channel[0] = AD5868_CHANNEL(0, 12, 4), - .channel[1] = AD5868_CHANNEL(1, 12, 4), - .channel[2] = AD5868_CHANNEL(2, 12, 4), - .channel[3] = AD5868_CHANNEL(3, 12, 4), - .int_vref_mv = 2500, - }, - [ID_AD5685] = { - .channel[0] = AD5868_CHANNEL(0, 14, 2), - .channel[1] = AD5868_CHANNEL(1, 14, 2), - .channel[2] = AD5868_CHANNEL(2, 14, 2), - .channel[3] = AD5868_CHANNEL(3, 14, 2), - .int_vref_mv = 2500, - }, - [ID_AD5686] = { - .channel[0] = AD5868_CHANNEL(0, 16, 0), - .channel[1] = AD5868_CHANNEL(1, 16, 0), - .channel[2] = AD5868_CHANNEL(2, 16, 0), - .channel[3] = AD5868_CHANNEL(3, 16, 0), - .int_vref_mv = 2500, - }, -}; - - -static int __devinit ad5686_probe(struct spi_device *spi) -{ - struct ad5686_state *st; - struct iio_dev *indio_dev; - int ret, regdone = 0, voltage_uv = 0; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) - return -ENOMEM; - - st = iio_priv(indio_dev); - spi_set_drvdata(spi, indio_dev); - - st->reg = regulator_get(&spi->dev, "vcc"); - if (!IS_ERR(st->reg)) { - ret = regulator_enable(st->reg); - if (ret) - goto error_put_reg; - - voltage_uv = regulator_get_voltage(st->reg); - } - - st->chip_info = - &ad5686_chip_info_tbl[spi_get_device_id(spi)->driver_data]; - - if (voltage_uv) - st->vref_mv = voltage_uv / 1000; - else - st->vref_mv = st->chip_info->int_vref_mv; - - st->spi = spi; - - /* Set all the power down mode for all channels to 1K pulldown */ - st->pwr_down_mode = 0x55; - - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(spi)->name; - indio_dev->info = &ad5686_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = st->chip_info->channel; - indio_dev->num_channels = AD5686_DAC_CHANNELS; - - regdone = 1; - ret = ad5686_spi_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0, - !!voltage_uv, 0); - if (ret) - goto error_disable_reg; - - ret = iio_device_register(indio_dev); - if (ret) - goto error_disable_reg; - - return 0; - -error_disable_reg: - if (!IS_ERR(st->reg)) - regulator_disable(st->reg); -error_put_reg: - if (!IS_ERR(st->reg)) - regulator_put(st->reg); - - iio_device_free(indio_dev); - - return ret; -} - -static int __devexit ad5686_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct ad5686_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - if (!IS_ERR(st->reg)) { - regulator_disable(st->reg); - regulator_put(st->reg); - } - iio_device_free(indio_dev); - - return 0; -} - -static const struct spi_device_id ad5686_id[] = { - {"ad5684", ID_AD5684}, - {"ad5685", ID_AD5685}, - {"ad5686", ID_AD5686}, - {} -}; -MODULE_DEVICE_TABLE(spi, ad5686_id); - -static struct spi_driver ad5686_driver = { - .driver = { - .name = "ad5686", - .owner = THIS_MODULE, - }, - .probe = ad5686_probe, - .remove = __devexit_p(ad5686_remove), - .id_table = ad5686_id, -}; -module_spi_driver(ad5686_driver); - -MODULE_AUTHOR("Michael Hennerich "); -MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5764.c b/drivers/staging/iio/dac/ad5764.c deleted file mode 100644 index ffce30447445..000000000000 --- a/drivers/staging/iio/dac/ad5764.c +++ /dev/null @@ -1,382 +0,0 @@ -/* - * Analog devices AD5764, AD5764R, AD5744, AD5744R quad-channel - * Digital to Analog Converters driver - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define AD5764_REG_SF_NOP 0x0 -#define AD5764_REG_SF_CONFIG 0x1 -#define AD5764_REG_SF_CLEAR 0x4 -#define AD5764_REG_SF_LOAD 0x5 -#define AD5764_REG_DATA(x) ((2 << 3) | (x)) -#define AD5764_REG_COARSE_GAIN(x) ((3 << 3) | (x)) -#define AD5764_REG_FINE_GAIN(x) ((4 << 3) | (x)) -#define AD5764_REG_OFFSET(x) ((5 << 3) | (x)) - -#define AD5764_NUM_CHANNELS 4 - -/** - * struct ad5764_chip_info - chip specific information - * @int_vref: Value of the internal reference voltage in uV - 0 if external - * reference voltage is used - * @channel channel specification -*/ - -struct ad5764_chip_info { - unsigned long int_vref; - const struct iio_chan_spec *channels; -}; - -/** - * struct ad5764_state - driver instance specific data - * @spi: spi_device - * @chip_info: chip info - * @vref_reg: vref supply regulators - * @data: spi transfer buffers - */ - -struct ad5764_state { - struct spi_device *spi; - const struct ad5764_chip_info *chip_info; - struct regulator_bulk_data vref_reg[2]; - - /* - * DMA (thus cache coherency maintenance) requires the - * transfer buffers to live in their own cache lines. - */ - union { - __be32 d32; - u8 d8[4]; - } data[2] ____cacheline_aligned; -}; - -enum ad5764_type { - ID_AD5744, - ID_AD5744R, - ID_AD5764, - ID_AD5764R, -}; - -#define AD5764_CHANNEL(_chan, _bits) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .channel = (_chan), \ - .address = (_chan), \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_OFFSET_SHARED_BIT | \ - IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \ - IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \ - IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \ - .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)) \ -} - -#define DECLARE_AD5764_CHANNELS(_name, _bits) \ -const struct iio_chan_spec _name##_channels[] = { \ - AD5764_CHANNEL(0, (_bits)), \ - AD5764_CHANNEL(1, (_bits)), \ - AD5764_CHANNEL(2, (_bits)), \ - AD5764_CHANNEL(3, (_bits)), \ -}; - -static DECLARE_AD5764_CHANNELS(ad5764, 16); -static DECLARE_AD5764_CHANNELS(ad5744, 14); - -static const struct ad5764_chip_info ad5764_chip_infos[] = { - [ID_AD5744] = { - .int_vref = 0, - .channels = ad5744_channels, - }, - [ID_AD5744R] = { - .int_vref = 5000000, - .channels = ad5744_channels, - }, - [ID_AD5764] = { - .int_vref = 0, - .channels = ad5764_channels, - }, - [ID_AD5764R] = { - .int_vref = 5000000, - .channels = ad5764_channels, - }, -}; - -static int ad5764_write(struct iio_dev *indio_dev, unsigned int reg, - unsigned int val) -{ - struct ad5764_state *st = iio_priv(indio_dev); - int ret; - - mutex_lock(&indio_dev->mlock); - st->data[0].d32 = cpu_to_be32((reg << 16) | val); - - ret = spi_write(st->spi, &st->data[0].d8[1], 3); - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static int ad5764_read(struct iio_dev *indio_dev, unsigned int reg, - unsigned int *val) -{ - struct ad5764_state *st = iio_priv(indio_dev); - struct spi_message m; - int ret; - struct spi_transfer t[] = { - { - .tx_buf = &st->data[0].d8[1], - .len = 3, - .cs_change = 1, - }, { - .rx_buf = &st->data[1].d8[1], - .len = 3, - }, - }; - - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - - mutex_lock(&indio_dev->mlock); - - st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16)); - - ret = spi_sync(st->spi, &m); - if (ret >= 0) - *val = be32_to_cpu(st->data[1].d32) & 0xffff; - - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static int ad5764_chan_info_to_reg(struct iio_chan_spec const *chan, long info) -{ - switch (info) { - case 0: - return AD5764_REG_DATA(chan->address); - case IIO_CHAN_INFO_CALIBBIAS: - return AD5764_REG_OFFSET(chan->address); - case IIO_CHAN_INFO_CALIBSCALE: - return AD5764_REG_FINE_GAIN(chan->address); - default: - break; - } - - return 0; -} - -static int ad5764_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int val, int val2, long info) -{ - const int max_val = (1 << chan->scan_type.realbits); - unsigned int reg; - - switch (info) { - case IIO_CHAN_INFO_RAW: - if (val >= max_val || val < 0) - return -EINVAL; - val <<= chan->scan_type.shift; - break; - case IIO_CHAN_INFO_CALIBBIAS: - if (val >= 128 || val < -128) - return -EINVAL; - break; - case IIO_CHAN_INFO_CALIBSCALE: - if (val >= 32 || val < -32) - return -EINVAL; - break; - default: - return -EINVAL; - } - - reg = ad5764_chan_info_to_reg(chan, info); - return ad5764_write(indio_dev, reg, (u16)val); -} - -static int ad5764_get_channel_vref(struct ad5764_state *st, - unsigned int channel) -{ - if (st->chip_info->int_vref) - return st->chip_info->int_vref; - else - return regulator_get_voltage(st->vref_reg[channel / 2].consumer); -} - -static int ad5764_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int *val, int *val2, long info) -{ - struct ad5764_state *st = iio_priv(indio_dev); - unsigned long scale_uv; - unsigned int reg; - int vref; - int ret; - - switch (info) { - case IIO_CHAN_INFO_RAW: - reg = AD5764_REG_DATA(chan->address); - ret = ad5764_read(indio_dev, reg, val); - if (ret < 0) - return ret; - *val >>= chan->scan_type.shift; - return IIO_VAL_INT; - case IIO_CHAN_INFO_CALIBBIAS: - reg = AD5764_REG_OFFSET(chan->address); - ret = ad5764_read(indio_dev, reg, val); - if (ret < 0) - return ret; - *val = sign_extend32(*val, 7); - return IIO_VAL_INT; - case IIO_CHAN_INFO_CALIBSCALE: - reg = AD5764_REG_FINE_GAIN(chan->address); - ret = ad5764_read(indio_dev, reg, val); - if (ret < 0) - return ret; - *val = sign_extend32(*val, 5); - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - /* vout = 4 * vref + ((dac_code / 65535) - 0.5) */ - vref = ad5764_get_channel_vref(st, chan->channel); - if (vref < 0) - return vref; - - scale_uv = (vref * 4 * 100) >> chan->scan_type.realbits; - *val = scale_uv / 100000; - *val2 = (scale_uv % 100000) * 10; - return IIO_VAL_INT_PLUS_MICRO; - case IIO_CHAN_INFO_OFFSET: - *val = -(1 << chan->scan_type.realbits) / 2; - return IIO_VAL_INT; - } - - return -EINVAL; -} - -static const struct iio_info ad5764_info = { - .read_raw = ad5764_read_raw, - .write_raw = ad5764_write_raw, - .driver_module = THIS_MODULE, -}; - -static int __devinit ad5764_probe(struct spi_device *spi) -{ - enum ad5764_type type = spi_get_device_id(spi)->driver_data; - struct iio_dev *indio_dev; - struct ad5764_state *st; - int ret; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - dev_err(&spi->dev, "Failed to allocate iio device\n"); - return -ENOMEM; - } - - st = iio_priv(indio_dev); - spi_set_drvdata(spi, indio_dev); - - st->spi = spi; - st->chip_info = &ad5764_chip_infos[type]; - - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(spi)->name; - indio_dev->info = &ad5764_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->num_channels = AD5764_NUM_CHANNELS; - indio_dev->channels = st->chip_info->channels; - - if (st->chip_info->int_vref == 0) { - st->vref_reg[0].supply = "vrefAB"; - st->vref_reg[1].supply = "vrefCD"; - - ret = regulator_bulk_get(&st->spi->dev, - ARRAY_SIZE(st->vref_reg), st->vref_reg); - if (ret) { - dev_err(&spi->dev, "Failed to request vref regulators: %d\n", - ret); - goto error_free; - } - - ret = regulator_bulk_enable(ARRAY_SIZE(st->vref_reg), - st->vref_reg); - if (ret) { - dev_err(&spi->dev, "Failed to enable vref regulators: %d\n", - ret); - goto error_free_reg; - } - } - - ret = iio_device_register(indio_dev); - if (ret) { - dev_err(&spi->dev, "Failed to register iio device: %d\n", ret); - goto error_disable_reg; - } - - return 0; - -error_disable_reg: - if (st->chip_info->int_vref == 0) - regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg); -error_free_reg: - if (st->chip_info->int_vref == 0) - regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg); -error_free: - iio_device_free(indio_dev); - - return ret; -} - -static int __devexit ad5764_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct ad5764_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - - if (st->chip_info->int_vref == 0) { - regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg); - regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg); - } - - iio_device_free(indio_dev); - - return 0; -} - -static const struct spi_device_id ad5764_ids[] = { - { "ad5744", ID_AD5744 }, - { "ad5744r", ID_AD5744R }, - { "ad5764", ID_AD5764 }, - { "ad5764r", ID_AD5764R }, - { } -}; -MODULE_DEVICE_TABLE(spi, ad5764_ids); - -static struct spi_driver ad5764_driver = { - .driver = { - .name = "ad5764", - .owner = THIS_MODULE, - }, - .probe = ad5764_probe, - .remove = __devexit_p(ad5764_remove), - .id_table = ad5764_ids, -}; -module_spi_driver(ad5764_driver); - -MODULE_AUTHOR("Lars-Peter Clausen "); -MODULE_DESCRIPTION("Analog Devices AD5744/AD5744R/AD5764/AD5764R DAC"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c deleted file mode 100644 index 5de28c2a57ef..000000000000 --- a/drivers/staging/iio/dac/ad5791.c +++ /dev/null @@ -1,486 +0,0 @@ -/* - * AD5760, AD5780, AD5781, AD5790, AD5791 Voltage Output Digital to Analog - * Converter - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#include "ad5791.h" - -#define AD5791_RES_MASK(x) ((1 << (x)) - 1) -#define AD5791_DAC_MASK AD5791_RES_MASK(20) -#define AD5791_DAC_MSB (1 << 19) - -#define AD5791_CMD_READ (1 << 23) -#define AD5791_CMD_WRITE (0 << 23) -#define AD5791_ADDR(addr) ((addr) << 20) - -/* Registers */ -#define AD5791_ADDR_NOOP 0 -#define AD5791_ADDR_DAC0 1 -#define AD5791_ADDR_CTRL 2 -#define AD5791_ADDR_CLRCODE 3 -#define AD5791_ADDR_SW_CTRL 4 - -/* Control Register */ -#define AD5791_CTRL_RBUF (1 << 1) -#define AD5791_CTRL_OPGND (1 << 2) -#define AD5791_CTRL_DACTRI (1 << 3) -#define AD5791_CTRL_BIN2SC (1 << 4) -#define AD5791_CTRL_SDODIS (1 << 5) -#define AD5761_CTRL_LINCOMP(x) ((x) << 6) - -#define AD5791_LINCOMP_0_10 0 -#define AD5791_LINCOMP_10_12 1 -#define AD5791_LINCOMP_12_16 2 -#define AD5791_LINCOMP_16_19 3 -#define AD5791_LINCOMP_19_20 12 - -#define AD5780_LINCOMP_0_10 0 -#define AD5780_LINCOMP_10_20 12 - -/* Software Control Register */ -#define AD5791_SWCTRL_LDAC (1 << 0) -#define AD5791_SWCTRL_CLR (1 << 1) -#define AD5791_SWCTRL_RESET (1 << 2) - -#define AD5791_DAC_PWRDN_6K 0 -#define AD5791_DAC_PWRDN_3STATE 1 - -/** - * struct ad5791_chip_info - chip specific information - * @get_lin_comp: function pointer to the device specific function - */ - -struct ad5791_chip_info { - int (*get_lin_comp) (unsigned int span); -}; - -/** - * struct ad5791_state - driver instance specific data - * @us: spi_device - * @reg_vdd: positive supply regulator - * @reg_vss: negative supply regulator - * @chip_info: chip model specific constants - * @vref_mv: actual reference voltage used - * @vref_neg_mv: voltage of the negative supply - * @pwr_down_mode current power down mode - */ - -struct ad5791_state { - struct spi_device *spi; - struct regulator *reg_vdd; - struct regulator *reg_vss; - const struct ad5791_chip_info *chip_info; - unsigned short vref_mv; - unsigned int vref_neg_mv; - unsigned ctrl; - unsigned pwr_down_mode; - bool pwr_down; -}; - -/** - * ad5791_supported_device_ids: - */ - -enum ad5791_supported_device_ids { - ID_AD5760, - ID_AD5780, - ID_AD5781, - ID_AD5791, -}; - -static int ad5791_spi_write(struct spi_device *spi, u8 addr, u32 val) -{ - union { - u32 d32; - u8 d8[4]; - } data; - - data.d32 = cpu_to_be32(AD5791_CMD_WRITE | - AD5791_ADDR(addr) | - (val & AD5791_DAC_MASK)); - - return spi_write(spi, &data.d8[1], 3); -} - -static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val) -{ - union { - u32 d32; - u8 d8[4]; - } data[3]; - int ret; - struct spi_message msg; - struct spi_transfer xfers[] = { - { - .tx_buf = &data[0].d8[1], - .bits_per_word = 8, - .len = 3, - .cs_change = 1, - }, { - .tx_buf = &data[1].d8[1], - .rx_buf = &data[2].d8[1], - .bits_per_word = 8, - .len = 3, - }, - }; - - data[0].d32 = cpu_to_be32(AD5791_CMD_READ | - AD5791_ADDR(addr)); - data[1].d32 = cpu_to_be32(AD5791_ADDR(AD5791_ADDR_NOOP)); - - spi_message_init(&msg); - spi_message_add_tail(&xfers[0], &msg); - spi_message_add_tail(&xfers[1], &msg); - ret = spi_sync(spi, &msg); - - *val = be32_to_cpu(data[2].d32); - - return ret; -} - -static const char * const ad5791_powerdown_modes[] = { - "6kohm_to_gnd", - "three_state", -}; - -static int ad5791_get_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan) -{ - struct ad5791_state *st = iio_priv(indio_dev); - - return st->pwr_down_mode; -} - -static int ad5791_set_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, unsigned int mode) -{ - struct ad5791_state *st = iio_priv(indio_dev); - - st->pwr_down_mode = mode; - - return 0; -} - -static const struct iio_enum ad5791_powerdown_mode_enum = { - .items = ad5791_powerdown_modes, - .num_items = ARRAY_SIZE(ad5791_powerdown_modes), - .get = ad5791_get_powerdown_mode, - .set = ad5791_set_powerdown_mode, -}; - -static ssize_t ad5791_read_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, char *buf) -{ - struct ad5791_state *st = iio_priv(indio_dev); - - return sprintf(buf, "%d\n", st->pwr_down); -} - -static ssize_t ad5791_write_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, const char *buf, - size_t len) -{ - bool pwr_down; - int ret; - struct ad5791_state *st = iio_priv(indio_dev); - - ret = strtobool(buf, &pwr_down); - if (ret) - return ret; - - if (!pwr_down) { - st->ctrl &= ~(AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI); - } else { - if (st->pwr_down_mode == AD5791_DAC_PWRDN_6K) - st->ctrl |= AD5791_CTRL_OPGND; - else if (st->pwr_down_mode == AD5791_DAC_PWRDN_3STATE) - st->ctrl |= AD5791_CTRL_DACTRI; - } - st->pwr_down = pwr_down; - - ret = ad5791_spi_write(st->spi, AD5791_ADDR_CTRL, st->ctrl); - - return ret ? ret : len; -} - -static int ad5791_get_lin_comp(unsigned int span) -{ - if (span <= 10000) - return AD5791_LINCOMP_0_10; - else if (span <= 12000) - return AD5791_LINCOMP_10_12; - else if (span <= 16000) - return AD5791_LINCOMP_12_16; - else if (span <= 19000) - return AD5791_LINCOMP_16_19; - else - return AD5791_LINCOMP_19_20; -} - -static int ad5780_get_lin_comp(unsigned int span) -{ - if (span <= 10000) - return AD5780_LINCOMP_0_10; - else - return AD5780_LINCOMP_10_20; -} -static const struct ad5791_chip_info ad5791_chip_info_tbl[] = { - [ID_AD5760] = { - .get_lin_comp = ad5780_get_lin_comp, - }, - [ID_AD5780] = { - .get_lin_comp = ad5780_get_lin_comp, - }, - [ID_AD5781] = { - .get_lin_comp = ad5791_get_lin_comp, - }, - [ID_AD5791] = { - .get_lin_comp = ad5791_get_lin_comp, - }, -}; - -static int ad5791_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long m) -{ - struct ad5791_state *st = iio_priv(indio_dev); - u64 val64; - int ret; - - switch (m) { - case IIO_CHAN_INFO_RAW: - ret = ad5791_spi_read(st->spi, chan->address, val); - if (ret) - return ret; - *val &= AD5791_DAC_MASK; - *val >>= chan->scan_type.shift; - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - *val = 0; - *val2 = (((u64)st->vref_mv) * 1000000ULL) >> chan->scan_type.realbits; - return IIO_VAL_INT_PLUS_MICRO; - case IIO_CHAN_INFO_OFFSET: - val64 = (((u64)st->vref_neg_mv) << chan->scan_type.realbits); - do_div(val64, st->vref_mv); - *val = -val64; - return IIO_VAL_INT; - default: - return -EINVAL; - } - -}; - -static const struct iio_chan_spec_ext_info ad5791_ext_info[] = { - { - .name = "powerdown", - .shared = true, - .read = ad5791_read_dac_powerdown, - .write = ad5791_write_dac_powerdown, - }, - IIO_ENUM("powerdown_mode", true, &ad5791_powerdown_mode_enum), - IIO_ENUM_AVAILABLE("powerdown_mode", &ad5791_powerdown_mode_enum), - { }, -}; - -#define AD5791_CHAN(bits, shift) { \ - .type = IIO_VOLTAGE, \ - .output = 1, \ - .indexed = 1, \ - .address = AD5791_ADDR_DAC0, \ - .channel = 0, \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SHARED_BIT | \ - IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ - .scan_type = IIO_ST('u', bits, 24, shift), \ - .ext_info = ad5791_ext_info, \ -} - -static const struct iio_chan_spec ad5791_channels[] = { - [ID_AD5760] = AD5791_CHAN(16, 4), - [ID_AD5780] = AD5791_CHAN(18, 2), - [ID_AD5781] = AD5791_CHAN(18, 2), - [ID_AD5791] = AD5791_CHAN(20, 0) -}; - -static int ad5791_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, - int val2, - long mask) -{ - struct ad5791_state *st = iio_priv(indio_dev); - - switch (mask) { - case IIO_CHAN_INFO_RAW: - val &= AD5791_RES_MASK(chan->scan_type.realbits); - val <<= chan->scan_type.shift; - - return ad5791_spi_write(st->spi, chan->address, val); - - default: - return -EINVAL; - } -} - -static const struct iio_info ad5791_info = { - .read_raw = &ad5791_read_raw, - .write_raw = &ad5791_write_raw, - .driver_module = THIS_MODULE, -}; - -static int __devinit ad5791_probe(struct spi_device *spi) -{ - struct ad5791_platform_data *pdata = spi->dev.platform_data; - struct iio_dev *indio_dev; - struct ad5791_state *st; - int ret, pos_voltage_uv = 0, neg_voltage_uv = 0; - - indio_dev = iio_device_alloc(sizeof(*st)); - if (indio_dev == NULL) { - ret = -ENOMEM; - goto error_ret; - } - st = iio_priv(indio_dev); - st->reg_vdd = regulator_get(&spi->dev, "vdd"); - if (!IS_ERR(st->reg_vdd)) { - ret = regulator_enable(st->reg_vdd); - if (ret) - goto error_put_reg_pos; - - pos_voltage_uv = regulator_get_voltage(st->reg_vdd); - } - - st->reg_vss = regulator_get(&spi->dev, "vss"); - if (!IS_ERR(st->reg_vss)) { - ret = regulator_enable(st->reg_vss); - if (ret) - goto error_put_reg_neg; - - neg_voltage_uv = regulator_get_voltage(st->reg_vss); - } - - st->pwr_down = true; - st->spi = spi; - - if (!IS_ERR(st->reg_vss) && !IS_ERR(st->reg_vdd)) { - st->vref_mv = (pos_voltage_uv + neg_voltage_uv) / 1000; - st->vref_neg_mv = neg_voltage_uv / 1000; - } else if (pdata) { - st->vref_mv = pdata->vref_pos_mv + pdata->vref_neg_mv; - st->vref_neg_mv = pdata->vref_neg_mv; - } else { - dev_warn(&spi->dev, "reference voltage unspecified\n"); - } - - ret = ad5791_spi_write(spi, AD5791_ADDR_SW_CTRL, AD5791_SWCTRL_RESET); - if (ret) - goto error_disable_reg_neg; - - st->chip_info = &ad5791_chip_info_tbl[spi_get_device_id(spi) - ->driver_data]; - - - st->ctrl = AD5761_CTRL_LINCOMP(st->chip_info->get_lin_comp(st->vref_mv)) - | ((pdata && pdata->use_rbuf_gain2) ? 0 : AD5791_CTRL_RBUF) | - AD5791_CTRL_BIN2SC; - - ret = ad5791_spi_write(spi, AD5791_ADDR_CTRL, st->ctrl | - AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI); - if (ret) - goto error_disable_reg_neg; - - spi_set_drvdata(spi, indio_dev); - indio_dev->dev.parent = &spi->dev; - indio_dev->info = &ad5791_info; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels - = &ad5791_channels[spi_get_device_id(spi)->driver_data]; - indio_dev->num_channels = 1; - indio_dev->name = spi_get_device_id(st->spi)->name; - ret = iio_device_register(indio_dev); - if (ret) - goto error_disable_reg_neg; - - return 0; - -error_disable_reg_neg: - if (!IS_ERR(st->reg_vss)) - regulator_disable(st->reg_vss); -error_put_reg_neg: - if (!IS_ERR(st->reg_vss)) - regulator_put(st->reg_vss); - - if (!IS_ERR(st->reg_vdd)) - regulator_disable(st->reg_vdd); -error_put_reg_pos: - if (!IS_ERR(st->reg_vdd)) - regulator_put(st->reg_vdd); - iio_device_free(indio_dev); -error_ret: - - return ret; -} - -static int __devexit ad5791_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct ad5791_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - if (!IS_ERR(st->reg_vdd)) { - regulator_disable(st->reg_vdd); - regulator_put(st->reg_vdd); - } - - if (!IS_ERR(st->reg_vss)) { - regulator_disable(st->reg_vss); - regulator_put(st->reg_vss); - } - iio_device_free(indio_dev); - - return 0; -} - -static const struct spi_device_id ad5791_id[] = { - {"ad5760", ID_AD5760}, - {"ad5780", ID_AD5780}, - {"ad5781", ID_AD5781}, - {"ad5790", ID_AD5791}, - {"ad5791", ID_AD5791}, - {} -}; -MODULE_DEVICE_TABLE(spi, ad5791_id); - -static struct spi_driver ad5791_driver = { - .driver = { - .name = "ad5791", - .owner = THIS_MODULE, - }, - .probe = ad5791_probe, - .remove = __devexit_p(ad5791_remove), - .id_table = ad5791_id, -}; -module_spi_driver(ad5791_driver); - -MODULE_AUTHOR("Michael Hennerich "); -MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/dac/ad5791.h b/drivers/staging/iio/dac/ad5791.h deleted file mode 100644 index 87a6c922f18e..000000000000 --- a/drivers/staging/iio/dac/ad5791.h +++ /dev/null @@ -1,29 +0,0 @@ -/* - * AD5791 SPI DAC driver - * - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - */ - -#ifndef SPI_AD5791_H_ -#define SPI_AD5791_H_ - -/* - * TODO: struct ad5791_platform_data needs to go into include/linux/iio - */ - -/** - * struct ad5791_platform_data - platform specific information - * @vref_pos_mv: Vdd Positive Analog Supply Volatge (mV) - * @vref_neg_mv: Vdd Negative Analog Supply Volatge (mV) - * @use_rbuf_gain2: ext. amplifier connected in gain of two configuration - */ - -struct ad5791_platform_data { - u16 vref_pos_mv; - u16 vref_neg_mv; - bool use_rbuf_gain2; -}; - -#endif /* SPI_AD5791_H_ */ diff --git a/drivers/staging/iio/dac/max517.c b/drivers/staging/iio/dac/max517.c deleted file mode 100644 index 403e06fbc39e..000000000000 --- a/drivers/staging/iio/dac/max517.c +++ /dev/null @@ -1,244 +0,0 @@ -/* - * max517.c - Support for Maxim MAX517, MAX518 and MAX519 - * - * Copyright (C) 2010, 2011 Roland Stigge - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include -#include -#include -#include -#include -#include - -#include -#include - -#include "max517.h" - -#define MAX517_DRV_NAME "max517" - -/* Commands */ -#define COMMAND_CHANNEL0 0x00 -#define COMMAND_CHANNEL1 0x01 /* for MAX518 and MAX519 */ -#define COMMAND_PD 0x08 /* Power Down */ - -enum max517_device_ids { - ID_MAX517, - ID_MAX518, - ID_MAX519, -}; - -struct max517_data { - struct iio_dev *indio_dev; - struct i2c_client *client; - unsigned short vref_mv[2]; -}; - -/* - * channel: bit 0: channel 1 - * bit 1: channel 2 - * (this way, it's possible to set both channels at once) - */ -static int max517_set_value(struct iio_dev *indio_dev, - long val, int channel) -{ - struct max517_data *data = iio_priv(indio_dev); - struct i2c_client *client = data->client; - u8 outbuf[2]; - int res; - - if (val < 0 || val > 255) - return -EINVAL; - - outbuf[0] = channel; - outbuf[1] = val; - - res = i2c_master_send(client, outbuf, 2); - if (res < 0) - return res; - else if (res != 2) - return -EIO; - else - return 0; -} - -static int max517_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long m) -{ - struct max517_data *data = iio_priv(indio_dev); - unsigned int scale_uv; - - switch (m) { - case IIO_CHAN_INFO_SCALE: - /* Corresponds to Vref / 2^(bits) */ - scale_uv = (data->vref_mv[chan->channel] * 1000) >> 8; - *val = scale_uv / 1000000; - *val2 = scale_uv % 1000000; - return IIO_VAL_INT_PLUS_MICRO; - default: - break; - } - return -EINVAL; -} - -static int max517_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int val, int val2, long mask) -{ - int ret; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - ret = max517_set_value(indio_dev, val, chan->channel); - break; - default: - ret = -EINVAL; - break; - } - - return ret; -} - -#ifdef CONFIG_PM_SLEEP -static int max517_suspend(struct device *dev) -{ - u8 outbuf = COMMAND_PD; - - return i2c_master_send(to_i2c_client(dev), &outbuf, 1); -} - -static int max517_resume(struct device *dev) -{ - u8 outbuf = 0; - - return i2c_master_send(to_i2c_client(dev), &outbuf, 1); -} - -static SIMPLE_DEV_PM_OPS(max517_pm_ops, max517_suspend, max517_resume); -#define MAX517_PM_OPS (&max517_pm_ops) -#else -#define MAX517_PM_OPS NULL -#endif - -static const struct iio_info max517_info = { - .read_raw = max517_read_raw, - .write_raw = max517_write_raw, - .driver_module = THIS_MODULE, -}; - -#define MAX517_CHANNEL(chan) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .output = 1, \ - .channel = (chan), \ - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ - IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ - .scan_type = IIO_ST('u', 8, 8, 0), \ -} - -static const struct iio_chan_spec max517_channels[] = { - MAX517_CHANNEL(0), - MAX517_CHANNEL(1) -}; - -static int max517_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct max517_data *data; - struct iio_dev *indio_dev; - struct max517_platform_data *platform_data = client->dev.platform_data; - int err; - - indio_dev = iio_device_alloc(sizeof(*data)); - if (indio_dev == NULL) { - err = -ENOMEM; - goto exit; - } - data = iio_priv(indio_dev); - i2c_set_clientdata(client, indio_dev); - data->client = client; - - /* establish that the iio_dev is a child of the i2c device */ - indio_dev->dev.parent = &client->dev; - - /* reduced channel set for MAX517 */ - if (id->driver_data == ID_MAX517) - indio_dev->num_channels = 1; - else - indio_dev->num_channels = 2; - indio_dev->channels = max517_channels; - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->info = &max517_info; - - /* - * Reference voltage on MAX518 and default is 5V, else take vref_mv - * from platform_data - */ - if (id->driver_data == ID_MAX518 || !platform_data) { - data->vref_mv[0] = data->vref_mv[1] = 5000; /* mV */ - } else { - data->vref_mv[0] = platform_data->vref_mv[0]; - data->vref_mv[1] = platform_data->vref_mv[1]; - } - - err = iio_device_register(indio_dev); - if (err) - goto exit_free_device; - - dev_info(&client->dev, "DAC registered\n"); - - return 0; - -exit_free_device: - iio_device_free(indio_dev); -exit: - return err; -} - -static int max517_remove(struct i2c_client *client) -{ - iio_device_unregister(i2c_get_clientdata(client)); - iio_device_free(i2c_get_clientdata(client)); - - return 0; -} - -static const struct i2c_device_id max517_id[] = { - { "max517", ID_MAX517 }, - { "max518", ID_MAX518 }, - { "max519", ID_MAX519 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, max517_id); - -static struct i2c_driver max517_driver = { - .driver = { - .name = MAX517_DRV_NAME, - .pm = MAX517_PM_OPS, - }, - .probe = max517_probe, - .remove = max517_remove, - .id_table = max517_id, -}; -module_i2c_driver(max517_driver); - -MODULE_AUTHOR("Roland Stigge "); -MODULE_DESCRIPTION("MAX517/MAX518/MAX519 8-bit DAC"); -MODULE_LICENSE("GPL"); diff --git a/drivers/staging/iio/dac/max517.h b/drivers/staging/iio/dac/max517.h deleted file mode 100644 index 8106cf24642a..000000000000 --- a/drivers/staging/iio/dac/max517.h +++ /dev/null @@ -1,19 +0,0 @@ -/* - * MAX517 DAC driver - * - * Copyright 2011 Roland Stigge - * - * Licensed under the GPL-2 or later. - */ -#ifndef IIO_DAC_MAX517_H_ -#define IIO_DAC_MAX517_H_ - -/* - * TODO: struct max517_platform_data needs to go into include/linux/iio - */ - -struct max517_platform_data { - u16 vref_mv[2]; -}; - -#endif /* IIO_DAC_MAX517_H_ */ diff --git a/include/linux/iio/dac/ad5421.h b/include/linux/iio/dac/ad5421.h new file mode 100644 index 000000000000..8fd8f057a890 --- /dev/null +++ b/include/linux/iio/dac/ad5421.h @@ -0,0 +1,28 @@ +#ifndef __IIO_DAC_AD5421_H__ +#define __IIO_DAC_AD5421_H__ + +/** + * enum ad5421_current_range - Current range the AD5421 is configured for. + * @AD5421_CURRENT_RANGE_4mA_20mA: 4 mA to 20 mA (RANGE1,0 pins = 00) + * @AD5421_CURRENT_RANGE_3mA8_21mA: 3.8 mA to 21 mA (RANGE1,0 pins = x1) + * @AD5421_CURRENT_RANGE_3mA2_24mA: 3.2 mA to 24 mA (RANGE1,0 pins = 10) + */ + +enum ad5421_current_range { + AD5421_CURRENT_RANGE_4mA_20mA, + AD5421_CURRENT_RANGE_3mA8_21mA, + AD5421_CURRENT_RANGE_3mA2_24mA, +}; + +/** + * struct ad5421_platform_data - AD5421 DAC driver platform data + * @external_vref: whether an external reference voltage is used or not + * @current_range: Current range the AD5421 is configured for + */ + +struct ad5421_platform_data { + bool external_vref; + enum ad5421_current_range current_range; +}; + +#endif diff --git a/include/linux/iio/dac/ad5504.h b/include/linux/iio/dac/ad5504.h new file mode 100644 index 000000000000..43895376a9ca --- /dev/null +++ b/include/linux/iio/dac/ad5504.h @@ -0,0 +1,16 @@ +/* + * AD5504 SPI DAC driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#ifndef SPI_AD5504_H_ +#define SPI_AD5504_H_ + +struct ad5504_platform_data { + u16 vref_mv; +}; + +#endif /* SPI_AD5504_H_ */ diff --git a/include/linux/iio/dac/ad5791.h b/include/linux/iio/dac/ad5791.h new file mode 100644 index 000000000000..45ee281c6660 --- /dev/null +++ b/include/linux/iio/dac/ad5791.h @@ -0,0 +1,25 @@ +/* + * AD5791 SPI DAC driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#ifndef SPI_AD5791_H_ +#define SPI_AD5791_H_ + +/** + * struct ad5791_platform_data - platform specific information + * @vref_pos_mv: Vdd Positive Analog Supply Volatge (mV) + * @vref_neg_mv: Vdd Negative Analog Supply Volatge (mV) + * @use_rbuf_gain2: ext. amplifier connected in gain of two configuration + */ + +struct ad5791_platform_data { + u16 vref_pos_mv; + u16 vref_neg_mv; + bool use_rbuf_gain2; +}; + +#endif /* SPI_AD5791_H_ */ diff --git a/include/linux/iio/dac/max517.h b/include/linux/iio/dac/max517.h new file mode 100644 index 000000000000..f6d1d252f08d --- /dev/null +++ b/include/linux/iio/dac/max517.h @@ -0,0 +1,15 @@ +/* + * MAX517 DAC driver + * + * Copyright 2011 Roland Stigge + * + * Licensed under the GPL-2 or later. + */ +#ifndef IIO_DAC_MAX517_H_ +#define IIO_DAC_MAX517_H_ + +struct max517_platform_data { + u16 vref_mv[2]; +}; + +#endif /* IIO_DAC_MAX517_H_ */ -- cgit v1.2.3 From a6e51c1e3425fe61040e9e770f514cfdf576a1f0 Mon Sep 17 00:00:00 2001 From: Paul Bolle Date: Fri, 8 Jun 2012 12:22:46 +0200 Subject: staging: Delete if_strip.h Commit f80a3f62383bf673c310926d55142d51f118926d ("Staging: strip: delete the driver") left if_strip.h unused: nothing in the tree includes it anymore. It is still exported, but since nothing in the kernel uses struct MetricomAddress, that seems pointless. Delete this header too. Signed-off-by: Paul Bolle Signed-off-by: Greg Kroah-Hartman --- include/linux/Kbuild | 1 - include/linux/if_strip.h | 27 --------------------------- 2 files changed, 28 deletions(-) delete mode 100644 include/linux/if_strip.h (limited to 'include/linux') diff --git a/include/linux/Kbuild b/include/linux/Kbuild index 8760be30b375..9366142ec7e5 100644 --- a/include/linux/Kbuild +++ b/include/linux/Kbuild @@ -183,7 +183,6 @@ header-y += if_ppp.h header-y += if_pppol2tp.h header-y += if_pppox.h header-y += if_slip.h -header-y += if_strip.h header-y += if_team.h header-y += if_tun.h header-y += if_tunnel.h diff --git a/include/linux/if_strip.h b/include/linux/if_strip.h deleted file mode 100644 index 6526a6235832..000000000000 --- a/include/linux/if_strip.h +++ /dev/null @@ -1,27 +0,0 @@ -/* - * if_strip.h -- - * - * Definitions for the STRIP interface - * - * Copyright 1996 The Board of Trustees of The Leland Stanford - * Junior University. All Rights Reserved. - * - * Permission to use, copy, modify, and distribute this - * software and its documentation for any purpose and without - * fee is hereby granted, provided that the above copyright - * notice appear in all copies. Stanford University - * makes no representations about the suitability of this - * software for any purpose. It is provided "as is" without - * express or implied warranty. - */ - -#ifndef __LINUX_STRIP_H -#define __LINUX_STRIP_H - -#include - -typedef struct { - __u8 c[6]; -} MetricomAddress; - -#endif -- cgit v1.2.3 From cf35ad61aca2c0c8983fa1e140c901f6588aba7e Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Fri, 8 Jun 2012 18:06:45 +0200 Subject: iio: add mcp4725 I2C DAC driver v5: * fix warnings (Jonathan Cameron) v4: * remove unused indio_dev pointer in mcp4725_data (Jonathan Cameron) * use u16 instead of unsigned short in mcp4725_data (Jonathan Cameron) * #include mcp4725.h from linux/iio/dac/ v3: * move from staging to drivers/iio * switch to chan_spec * dev_get_drvdata() -> dev_to_iio_dev() * annotate probe() and remove() with __devinit and __devexit v2 (based on comments from Jonathan Cameron and Lars-Peter Clausen): * did NOT switch to chan_spec yet * rebase to staging-next tree, update iio header locations * dropped dac.h #include, not needed * strict_strtol() -> kstrtol() * call iio_device_unregister() in remove() * everything in one patch Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/dac/Kconfig | 11 ++ drivers/iio/dac/Makefile | 1 + drivers/iio/dac/mcp4725.c | 227 ++++++++++++++++++++++++++++++++++++++++ include/linux/iio/dac/mcp4725.h | 16 +++ 4 files changed, 255 insertions(+) create mode 100644 drivers/iio/dac/mcp4725.c create mode 100644 include/linux/iio/dac/mcp4725.h (limited to 'include/linux') diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index a626f03871ec..92fb3a003510 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -118,4 +118,15 @@ config MAX517 This driver can also be built as a module. If so, the module will be called max517. +config MCP4725 + tristate "MCP4725 DAC driver" + depends on I2C + ---help--- + Say Y here if you want to build a driver for the Microchip + MCP 4725 12-bit digital-to-analog converter (DAC) with I2C + interface. + + To compile this driver as a module, choose M here: the module + will be called mcp4725. + endmenu diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile index 8ab1d264aab7..9ea3ceeefc07 100644 --- a/drivers/iio/dac/Makefile +++ b/drivers/iio/dac/Makefile @@ -13,3 +13,4 @@ obj-$(CONFIG_AD5764) += ad5764.o obj-$(CONFIG_AD5791) += ad5791.o obj-$(CONFIG_AD5686) += ad5686.o obj-$(CONFIG_MAX517) += max517.o +obj-$(CONFIG_MCP4725) += mcp4725.o diff --git a/drivers/iio/dac/mcp4725.c b/drivers/iio/dac/mcp4725.c new file mode 100644 index 000000000000..e0e168bd5b45 --- /dev/null +++ b/drivers/iio/dac/mcp4725.c @@ -0,0 +1,227 @@ +/* + * mcp4725.c - Support for Microchip MCP4725 + * + * Copyright (C) 2012 Peter Meerwald + * + * Based on max517 by Roland Stigge + * + * This file is subject to the terms and conditions of version 2 of + * the GNU General Public License. See the file COPYING in the main + * directory of this archive for more details. + * + * driver for the Microchip I2C 12-bit digital-to-analog converter (DAC) + * (7-bit I2C slave address 0x60, the three LSBs can be configured in + * hardware) + * + * writing the DAC value to EEPROM is not supported + */ + +#include +#include +#include +#include + +#include +#include + +#include + +#define MCP4725_DRV_NAME "mcp4725" + +struct mcp4725_data { + struct i2c_client *client; + u16 vref_mv; + u16 dac_value; +}; + +#ifdef CONFIG_PM_SLEEP +static int mcp4725_suspend(struct device *dev) +{ + u8 outbuf[2]; + + outbuf[0] = 0x3 << 4; /* power-down bits, 500 kOhm resistor */ + outbuf[1] = 0; + + return i2c_master_send(to_i2c_client(dev), outbuf, 2); +} + +static int mcp4725_resume(struct device *dev) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct mcp4725_data *data = iio_priv(indio_dev); + u8 outbuf[2]; + + /* restore previous DAC value */ + outbuf[0] = (data->dac_value >> 8) & 0xf; + outbuf[1] = data->dac_value & 0xff; + + return i2c_master_send(to_i2c_client(dev), outbuf, 2); +} + +static SIMPLE_DEV_PM_OPS(mcp4725_pm_ops, mcp4725_suspend, mcp4725_resume); +#define MCP4725_PM_OPS (&mcp4725_pm_ops) +#else +#define MCP4725_PM_OPS NULL +#endif + +static const struct iio_chan_spec mcp4725_channel = { + .type = IIO_VOLTAGE, + .indexed = 1, + .output = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT, + .scan_type = IIO_ST('u', 12, 16, 0), +}; + +static int mcp4725_set_value(struct iio_dev *indio_dev, int val) +{ + struct mcp4725_data *data = iio_priv(indio_dev); + u8 outbuf[2]; + int ret; + + if (val >= (1 << 12) || val < 0) + return -EINVAL; + + outbuf[0] = (val >> 8) & 0xf; + outbuf[1] = val & 0xff; + + ret = i2c_master_send(data->client, outbuf, 2); + if (ret < 0) + return ret; + else if (ret != 2) + return -EIO; + else + return 0; +} + +static int mcp4725_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct mcp4725_data *data = iio_priv(indio_dev); + unsigned long scale_uv; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + *val = data->dac_value; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + scale_uv = (data->vref_mv * 1000) >> 12; + *val = scale_uv / 1000000; + *val2 = scale_uv % 1000000; + return IIO_VAL_INT_PLUS_MICRO; + } + return -EINVAL; +} + +static int mcp4725_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct mcp4725_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = mcp4725_set_value(indio_dev, val); + data->dac_value = val; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static const struct iio_info mcp4725_info = { + .read_raw = mcp4725_read_raw, + .write_raw = mcp4725_write_raw, + .driver_module = THIS_MODULE, +}; + +static int __devinit mcp4725_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct mcp4725_data *data; + struct iio_dev *indio_dev; + struct mcp4725_platform_data *platform_data = client->dev.platform_data; + u8 inbuf[3]; + int err; + + if (!platform_data || !platform_data->vref_mv) { + dev_err(&client->dev, "invalid platform data"); + err = -EINVAL; + goto exit; + } + + indio_dev = iio_device_alloc(sizeof(*data)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto exit; + } + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + + indio_dev->dev.parent = &client->dev; + indio_dev->info = &mcp4725_info; + indio_dev->channels = &mcp4725_channel; + indio_dev->num_channels = 1; + indio_dev->modes = INDIO_DIRECT_MODE; + + data->vref_mv = platform_data->vref_mv; + + /* read current DAC value */ + err = i2c_master_recv(client, inbuf, 3); + if (err < 0) { + dev_err(&client->dev, "failed to read DAC value"); + goto exit_free_device; + } + data->dac_value = (inbuf[1] << 4) | (inbuf[2] >> 4); + + err = iio_device_register(indio_dev); + if (err) + goto exit_free_device; + + dev_info(&client->dev, "MCP4725 DAC registered\n"); + + return 0; + +exit_free_device: + iio_device_free(indio_dev); +exit: + return err; +} + +static int __devexit mcp4725_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + + iio_device_unregister(indio_dev); + iio_device_free(indio_dev); + + return 0; +} + +static const struct i2c_device_id mcp4725_id[] = { + { "mcp4725", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mcp4725_id); + +static struct i2c_driver mcp4725_driver = { + .driver = { + .name = MCP4725_DRV_NAME, + .pm = MCP4725_PM_OPS, + }, + .probe = mcp4725_probe, + .remove = __devexit_p(mcp4725_remove), + .id_table = mcp4725_id, +}; +module_i2c_driver(mcp4725_driver); + +MODULE_AUTHOR("Peter Meerwald "); +MODULE_DESCRIPTION("MCP4725 12-bit DAC"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/iio/dac/mcp4725.h b/include/linux/iio/dac/mcp4725.h new file mode 100644 index 000000000000..91530e6611e9 --- /dev/null +++ b/include/linux/iio/dac/mcp4725.h @@ -0,0 +1,16 @@ +/* + * MCP4725 DAC driver + * + * Copyright (C) 2012 Peter Meerwald + * + * Licensed under the GPL-2 or later. + */ + +#ifndef IIO_DAC_MCP4725_H_ +#define IIO_DAC_MCP4725_H_ + +struct mcp4725_platform_data { + u16 vref_mv; +}; + +#endif /* IIO_DAC_MCP4725_H_ */ -- cgit v1.2.3 From 988bb033d703c8b2e0e71c63f3f55616a0220ced Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Tue, 12 Jun 2012 14:39:37 +0200 Subject: iio: drop comment about 'real' channels Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/types.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h index 1b073b1cc7c2..d086736a9033 100644 --- a/include/linux/iio/types.h +++ b/include/linux/iio/types.h @@ -11,7 +11,6 @@ #define _IIO_TYPES_H_ enum iio_chan_type { - /* real channel types */ IIO_VOLTAGE, IIO_CURRENT, IIO_POWER, -- cgit v1.2.3 From 1787948873fd2ca730fb5891b6a2ade510367ace Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Tue, 12 Jun 2012 15:38:45 +0200 Subject: iio: fix typos in iio.h v2: * "used in in-kernel" (Jonathan Cameron) Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/iio.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 944c63511731..01afaa08ff21 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -131,7 +131,7 @@ struct iio_chan_spec_ext_info { /** * struct iio_enum - Enum channel info attribute - * items: A array of strings. + * items: An array of strings. * num_items: Length of the item array. * set: Set callback function, may be NULL. * get: Get callback function, may be NULL. @@ -218,7 +218,7 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev, * @extend_name: Allows labeling of channel attributes with an * informative name. Note this has no effect codes etc, * unlike modifiers. - * @datasheet_name: A name used in in kernel mapping of channels. It should + * @datasheet_name: A name used in in-kernel mapping of channels. It should * correspond to the first name that the channel is referred * to by in the datasheet (e.g. IND), or the nearest * possible compound name (e.g. IND-INC). @@ -393,7 +393,7 @@ struct iio_buffer_setup_ops { * @trig: [INTERN] current device trigger (buffer modes) * @pollfunc: [DRIVER] function run on trigger being received * @channels: [DRIVER] channel specification structure table - * @num_channels: [DRIVER] number of chanels specified in @channels. + * @num_channels: [DRIVER] number of channels specified in @channels. * @channel_attr_list: [INTERN] keep track of automatically created channel * attributes * @chan_attr_group: [INTERN] group for all attrs in base directory -- cgit v1.2.3 From a16561c6f713630270b905297f3eedf02db7fa98 Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Tue, 12 Jun 2012 15:38:46 +0200 Subject: iio: clarify channel and indexed in struct iio_chan_spec Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/iio.h | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 01afaa08ff21..9a9e6d52a6de 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -196,7 +196,7 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev, /** * struct iio_chan_spec - specification of a single channel * @type: What type of measurement is the channel making. - * @channel: What number or name do we wish to assign the channel. + * @channel: What number do we wish to assign the channel. * @channel2: If there is a second number for a differential * channel then this is it. If modified is set then the * value here specifies the modifier. @@ -227,9 +227,8 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev, * channel2. Examples are IIO_MOD_X for axial sensors about * the 'x' axis. * @indexed: Specify the channel has a numerical index. If not, - * the value in channel will be suppressed for attribute - * but not for event codes. Typically set it to 0 when - * the index is false. + * the channel index number will be suppressed for sysfs + * attributes but not for event codes. * @differential: Channel is differential. */ struct iio_chan_spec { -- cgit v1.2.3 From f4c349395e8ad4fe07f1222502568f0d9d5d1dfc Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Tue, 12 Jun 2012 15:38:47 +0200 Subject: iio: mark struct iio_enum elements with @ in comment Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/iio.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 9a9e6d52a6de..bd3e7217ceee 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -131,10 +131,10 @@ struct iio_chan_spec_ext_info { /** * struct iio_enum - Enum channel info attribute - * items: An array of strings. - * num_items: Length of the item array. - * set: Set callback function, may be NULL. - * get: Get callback function, may be NULL. + * @items: An array of strings. + * @num_items: Length of the item array. + * @set: Set callback function, may be NULL. + * @get: Get callback function, may be NULL. * * The iio_enum struct can be used to implement enum style channel attributes. * Enum style attributes are those which have a set of strings which map to -- cgit v1.2.3 From 7dcd7b60724cab551deba54f31752fa8959efab4 Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Tue, 12 Jun 2012 15:38:48 +0200 Subject: iio: cleanup iio/iio.h indentation of parameter description, fix parameter name (@dev -> @indio_dev) in comments, IIO device info structure -> IIO device structure Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/iio.h | 36 ++++++++++++++++++------------------ 1 file changed, 18 insertions(+), 18 deletions(-) (limited to 'include/linux') diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index bd3e7217ceee..ae0cad908182 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -131,10 +131,10 @@ struct iio_chan_spec_ext_info { /** * struct iio_enum - Enum channel info attribute - * @items: An array of strings. - * @num_items: Length of the item array. - * @set: Set callback function, may be NULL. - * @get: Get callback function, may be NULL. + * @items: An array of strings. + * @num_items: Length of the item array. + * @set: Set callback function, may be NULL. + * @get: Get callback function, may be NULL. * * The iio_enum struct can be used to implement enum style channel attributes. * Enum style attributes are those which have a set of strings which map to @@ -162,9 +162,9 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev, /** * IIO_ENUM() - Initialize enum extended channel attribute - * @_name: Attribute name - * @_shared: Whether the attribute is shared between all channels - * @_e: Pointer to a iio_enum struct + * @_name: Attribute name + * @_shared: Whether the attribute is shared between all channels + * @_e: Pointer to a iio_enum struct * * This should usually be used together with IIO_ENUM_AVAILABLE() */ @@ -179,8 +179,8 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev, /** * IIO_ENUM_AVAILABLE() - Initialize enum available extended channel attribute - * @_name: Attribute name ("_available" will be appended to the name) - * @_e: Pointer to a iio_enum struct + * @_name: Attribute name ("_available" will be appended to the name) + * @_e: Pointer to a iio_enum struct * * Creates a read only attribute which list all the available enum items in a * space separated list. This should usually be used together with IIO_ENUM() @@ -201,7 +201,7 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev, * channel then this is it. If modified is set then the * value here specifies the modifier. * @address: Driver specific identifier. - * @scan_index: Monotonic index to give ordering in scans when read + * @scan_index: Monotonic index to give ordering in scans when read * from a buffer. * @scan_type: Sign: 's' or 'u' to specify signed or unsigned * realbits: Number of valid bits of data @@ -211,7 +211,7 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev, * endianness: little or big endian * @info_mask: What information is to be exported about this channel. * This includes calibbias, scale etc. - * @event_mask: What events can this channel produce. + * @event_mask: What events can this channel produce. * @ext_info: Array of extended info attributes for this channel. * The array is NULL terminated, the last element should * have it's name field set to NULL. @@ -482,7 +482,7 @@ extern struct bus_type iio_bus_type; /** * iio_device_put() - reference counted deallocation of struct device - * @dev: the iio_device containing the device + * @indio_dev: IIO device structure containing the device **/ static inline void iio_device_put(struct iio_dev *indio_dev) { @@ -492,7 +492,7 @@ static inline void iio_device_put(struct iio_dev *indio_dev) /** * dev_to_iio_dev() - Get IIO device struct from a device struct - * @dev: The device embedded in the IIO device + * @dev: The device embedded in the IIO device * * Note: The device must be a IIO device, otherwise the result is undefined. */ @@ -503,7 +503,7 @@ static inline struct iio_dev *dev_to_iio_dev(struct device *dev) /** * iio_device_get() - increment reference count for the device - * @indio_dev: IIO device structure + * @indio_dev: IIO device structure * * Returns: The passed IIO device **/ @@ -516,7 +516,7 @@ static inline struct iio_dev *iio_device_get(struct iio_dev *indio_dev) #define IIO_ALIGN L1_CACHE_BYTES /** * iio_device_alloc() - allocate an iio_dev from a driver - * @sizeof_priv: Space to allocate for private structure. + * @sizeof_priv: Space to allocate for private structure. **/ struct iio_dev *iio_device_alloc(int sizeof_priv); @@ -533,13 +533,13 @@ static inline struct iio_dev *iio_priv_to_dev(void *priv) /** * iio_device_free() - free an iio_dev from a driver - * @dev: the iio_dev associated with the device + * @indio_dev: the iio_dev associated with the device **/ void iio_device_free(struct iio_dev *indio_dev); /** * iio_buffer_enabled() - helper function to test if the buffer is enabled - * @indio_dev: IIO device info structure for device + * @indio_dev: IIO device structure for device **/ static inline bool iio_buffer_enabled(struct iio_dev *indio_dev) { @@ -549,7 +549,7 @@ static inline bool iio_buffer_enabled(struct iio_dev *indio_dev) /** * iio_get_debugfs_dentry() - helper function to get the debugfs_dentry - * @indio_dev: IIO device info structure for device + * @indio_dev: IIO device structure for device **/ #if defined(CONFIG_DEBUG_FS) static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev) -- cgit v1.2.3 From f29e5956aebafe63f81e80f972c44c4a666e5c7f Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Sat, 26 May 2012 06:20:19 -0700 Subject: pstore: Add console log messages support Pstore doesn't support logging kernel messages in run-time, it only dumps dmesg when kernel oopses/panics. This makes pstore useless for debugging hangs caused by HW issues or improper use of HW (e.g. weird device inserted -> driver tried to write a reserved bits -> SoC hanged. In that case we don't get any messages in the pstore. Therefore, let's add a runtime logging support: PSTORE_TYPE_CONSOLE. Signed-off-by: Anton Vorontsov Acked-by: Kees Cook Acked-by: Colin Cross Signed-off-by: Greg Kroah-Hartman --- fs/pstore/Kconfig | 7 +++++++ fs/pstore/inode.c | 3 +++ fs/pstore/platform.c | 37 +++++++++++++++++++++++++++++++++++++ include/linux/pstore.h | 1 + 4 files changed, 48 insertions(+) (limited to 'include/linux') diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig index 23ade2680a4a..d044de6ee308 100644 --- a/fs/pstore/Kconfig +++ b/fs/pstore/Kconfig @@ -12,6 +12,13 @@ config PSTORE If you don't have a platform persistent store driver, say N. +config PSTORE_CONSOLE + bool "Log kernel console messages" + depends on PSTORE + help + When the option is enabled, pstore will log all kernel + messages, even if no oops or panic happened. + config PSTORE_RAM tristate "Log panic/oops to a RAM buffer" depends on PSTORE diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index 11a2aa2a56c4..45bff5441b04 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -212,6 +212,9 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, case PSTORE_TYPE_DMESG: sprintf(name, "dmesg-%s-%lld", psname, id); break; + case PSTORE_TYPE_CONSOLE: + sprintf(name, "console-%s", psname); + break; case PSTORE_TYPE_MCE: sprintf(name, "mce-%s-%lld", psname, id); break; diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 82c585f715e3..61461ed9b6c8 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -1,6 +1,7 @@ /* * Persistent Storage - platform driver interface parts. * + * Copyright (C) 2007-2008 Google, Inc. * Copyright (C) 2010 Intel Corporation * * This program is free software; you can redistribute it and/or modify @@ -22,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -156,6 +158,40 @@ static struct kmsg_dumper pstore_dumper = { .dump = pstore_dump, }; +#ifdef CONFIG_PSTORE_CONSOLE +static void pstore_console_write(struct console *con, const char *s, unsigned c) +{ + const char *e = s + c; + + while (s < e) { + unsigned long flags; + + if (c > psinfo->bufsize) + c = psinfo->bufsize; + spin_lock_irqsave(&psinfo->buf_lock, flags); + memcpy(psinfo->buf, s, c); + psinfo->write(PSTORE_TYPE_CONSOLE, 0, NULL, 0, c, psinfo); + spin_unlock_irqrestore(&psinfo->buf_lock, flags); + s += c; + c = e - s; + } +} + +static struct console pstore_console = { + .name = "pstore", + .write = pstore_console_write, + .flags = CON_PRINTBUFFER | CON_ENABLED | CON_ANYTIME, + .index = -1, +}; + +static void pstore_register_console(void) +{ + register_console(&pstore_console); +} +#else +static void pstore_register_console(void) {} +#endif + /* * platform specific persistent storage driver registers with * us here. If pstore is already mounted, call the platform @@ -193,6 +229,7 @@ int pstore_register(struct pstore_info *psi) pstore_get_records(0); kmsg_dump_register(&pstore_dumper); + pstore_register_console(); pstore_timer.expires = jiffies + PSTORE_INTERVAL; add_timer(&pstore_timer); diff --git a/include/linux/pstore.h b/include/linux/pstore.h index e1461e143be2..1bd014b8e432 100644 --- a/include/linux/pstore.h +++ b/include/linux/pstore.h @@ -29,6 +29,7 @@ enum pstore_type_id { PSTORE_TYPE_DMESG = 0, PSTORE_TYPE_MCE = 1, + PSTORE_TYPE_CONSOLE = 2, PSTORE_TYPE_UNKNOWN = 255 }; -- cgit v1.2.3 From b5d38e9bf1b0c4db19e336b59b38dfb5d28bf1bf Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Sat, 26 May 2012 06:20:23 -0700 Subject: pstore/ram: Add console messages handling The console log size is configurable via ramoops.console_size module option, and the log itself is available via /console-ramoops file. Signed-off-by: Anton Vorontsov Acked-by: Kees Cook Signed-off-by: Greg Kroah-Hartman --- fs/pstore/ram.c | 100 ++++++++++++++++++++++++++++++++++++++------- include/linux/pstore_ram.h | 1 + 2 files changed, 87 insertions(+), 14 deletions(-) (limited to 'include/linux') diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index d770d7266e96..c7acf94ff475 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -41,6 +41,10 @@ module_param(record_size, ulong, 0400); MODULE_PARM_DESC(record_size, "size of each dump done on oops/panic"); +static ulong ramoops_console_size = MIN_MEM_SIZE; +module_param_named(console_size, ramoops_console_size, ulong, 0400); +MODULE_PARM_DESC(console_size, "size of kernel console log"); + static ulong mem_address; module_param(mem_address, ulong, 0400); MODULE_PARM_DESC(mem_address, @@ -63,14 +67,17 @@ MODULE_PARM_DESC(ramoops_ecc, struct ramoops_context { struct persistent_ram_zone **przs; + struct persistent_ram_zone *cprz; phys_addr_t phys_addr; unsigned long size; size_t record_size; + size_t console_size; int dump_oops; bool ecc; unsigned int max_dump_cnt; unsigned int dump_write_cnt; unsigned int dump_read_cnt; + unsigned int console_read_cnt; struct pstore_info pstore; }; @@ -82,6 +89,7 @@ static int ramoops_pstore_open(struct pstore_info *psi) struct ramoops_context *cxt = psi->data; cxt->dump_read_cnt = 0; + cxt->console_read_cnt = 0; return 0; } @@ -124,6 +132,9 @@ static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, prz = ramoops_get_next_prz(cxt->przs, &cxt->dump_read_cnt, cxt->max_dump_cnt, id, type, PSTORE_TYPE_DMESG, 1); + if (!prz) + prz = ramoops_get_next_prz(&cxt->cprz, &cxt->console_read_cnt, + 1, id, type, PSTORE_TYPE_CONSOLE, 0); if (!prz) return 0; @@ -167,7 +178,13 @@ static int ramoops_pstore_write(enum pstore_type_id type, struct persistent_ram_zone *prz = cxt->przs[cxt->dump_write_cnt]; size_t hlen; - /* Currently ramoops is designed to only store dmesg dumps. */ + if (type == PSTORE_TYPE_CONSOLE) { + if (!cxt->cprz) + return -ENOMEM; + persistent_ram_write(cxt->cprz, cxt->pstore.buf, size); + return 0; + } + if (type != PSTORE_TYPE_DMESG) return -EINVAL; @@ -204,12 +221,23 @@ static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, struct pstore_info *psi) { struct ramoops_context *cxt = psi->data; + struct persistent_ram_zone *prz; - if (id >= cxt->max_dump_cnt) + switch (type) { + case PSTORE_TYPE_DMESG: + if (id >= cxt->max_dump_cnt) + return -EINVAL; + prz = cxt->przs[id]; + break; + case PSTORE_TYPE_CONSOLE: + prz = cxt->cprz; + break; + default: return -EINVAL; + } - persistent_ram_free_old(cxt->przs[id]); - persistent_ram_zap(cxt->przs[id]); + persistent_ram_free_old(prz); + persistent_ram_zap(prz); return 0; } @@ -276,6 +304,32 @@ fail_prz: return err; } +static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt, + struct persistent_ram_zone **prz, + phys_addr_t *paddr, size_t sz) +{ + if (!sz) + return 0; + + if (*paddr + sz > *paddr + cxt->size) + return -ENOMEM; + + *prz = persistent_ram_new(*paddr, sz, cxt->ecc); + if (IS_ERR(*prz)) { + int err = PTR_ERR(*prz); + + dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n", + sz, (unsigned long long)*paddr, err); + return err; + } + + persistent_ram_zap(*prz); + + *paddr += sz; + + return 0; +} + static int __init ramoops_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -291,34 +345,50 @@ static int __init ramoops_probe(struct platform_device *pdev) if (cxt->max_dump_cnt) goto fail_out; - if (!pdata->mem_size || !pdata->record_size) { - pr_err("The memory size and the record size must be " + if (!pdata->mem_size || (!pdata->record_size && !pdata->console_size)) { + pr_err("The memory size and the record/console size must be " "non-zero\n"); goto fail_out; } pdata->mem_size = rounddown_pow_of_two(pdata->mem_size); pdata->record_size = rounddown_pow_of_two(pdata->record_size); + pdata->console_size = rounddown_pow_of_two(pdata->console_size); cxt->dump_read_cnt = 0; cxt->size = pdata->mem_size; cxt->phys_addr = pdata->mem_address; cxt->record_size = pdata->record_size; + cxt->console_size = pdata->console_size; cxt->dump_oops = pdata->dump_oops; cxt->ecc = pdata->ecc; paddr = cxt->phys_addr; - dump_mem_sz = cxt->size; + dump_mem_sz = cxt->size - cxt->console_size; err = ramoops_init_przs(dev, cxt, &paddr, dump_mem_sz); - if (err) { + if (err) + goto fail_out; + + err = ramoops_init_prz(dev, cxt, &cxt->cprz, &paddr, cxt->console_size); + if (err) + goto fail_init_cprz; + + if (!cxt->przs && !cxt->cprz) { pr_err("memory size too small, minimum is %lu\n", - cxt->record_size); - goto fail_count; + cxt->console_size + cxt->record_size); + goto fail_cnt; } cxt->pstore.data = cxt; - cxt->pstore.bufsize = cxt->przs[0]->buffer_size; + /* + * Console can handle any buffer size, so prefer dumps buffer + * size since usually it is smaller. + */ + if (cxt->przs) + cxt->pstore.bufsize = cxt->przs[0]->buffer_size; + else + cxt->pstore.bufsize = cxt->cprz->buffer_size; cxt->pstore.buf = kmalloc(cxt->pstore.bufsize, GFP_KERNEL); spin_lock_init(&cxt->pstore.buf_lock); if (!cxt->pstore.buf) { @@ -341,9 +411,8 @@ static int __init ramoops_probe(struct platform_device *pdev) record_size = pdata->record_size; dump_oops = pdata->dump_oops; - pr_info("attached 0x%lx@0x%llx (%ux0x%zx), ecc: %s\n", + pr_info("attached 0x%lx@0x%llx, ecc: %s\n", cxt->size, (unsigned long long)cxt->phys_addr, - cxt->max_dump_cnt, cxt->record_size, ramoops_ecc ? "on" : "off"); return 0; @@ -353,7 +422,9 @@ fail_buf: fail_clear: cxt->pstore.bufsize = 0; cxt->max_dump_cnt = 0; -fail_count: +fail_cnt: + kfree(cxt->cprz); +fail_init_cprz: ramoops_free_przs(cxt); fail_out: return err; @@ -405,6 +476,7 @@ static int __init ramoops_init(void) dummy_data->mem_size = mem_size; dummy_data->mem_address = mem_address; dummy_data->record_size = record_size; + dummy_data->console_size = ramoops_console_size; dummy_data->dump_oops = dump_oops; dummy_data->ecc = ramoops_ecc; dummy = platform_create_bundle(&ramoops_driver, ramoops_probe, diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index 3b823d49a85a..9385d41cb1c3 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -93,6 +93,7 @@ struct ramoops_platform_data { unsigned long mem_size; unsigned long mem_address; unsigned long record_size; + unsigned long console_size; int dump_oops; bool ecc; }; -- cgit v1.2.3 From b8587daa756141da776e3d4c3a5a315f5af78708 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Sat, 26 May 2012 06:20:27 -0700 Subject: pstore/ram_core: Remove now unused code The code tried to maintain the global list of persistent ram zones, which isn't a great idea overall, plus since Android's ram_console is no longer there, we can remove some unused functions. Signed-off-by: Anton Vorontsov Acked-by: Kees Cook Acked-by: Colin Cross Signed-off-by: Greg Kroah-Hartman --- fs/pstore/ram_core.c | 77 ---------------------------------------------- include/linux/pstore_ram.h | 19 ------------ 2 files changed, 96 deletions(-) (limited to 'include/linux') diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index 78f6d4b2addb..0fd81611525c 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -35,8 +35,6 @@ struct persistent_ram_buffer { #define PERSISTENT_RAM_SIG (0x43474244) /* DBGC */ -static __initdata LIST_HEAD(persistent_ram_list); - static inline size_t buffer_size(struct persistent_ram_zone *prz) { return atomic_read(&prz->buffer->size); @@ -462,78 +460,3 @@ err: kfree(prz); return ERR_PTR(ret); } - -#ifndef MODULE -static int __init persistent_ram_buffer_init(const char *name, - struct persistent_ram_zone *prz) -{ - int i; - struct persistent_ram *ram; - struct persistent_ram_descriptor *desc; - phys_addr_t start; - - list_for_each_entry(ram, &persistent_ram_list, node) { - start = ram->start; - for (i = 0; i < ram->num_descs; i++) { - desc = &ram->descs[i]; - if (!strcmp(desc->name, name)) - return persistent_ram_buffer_map(start, - desc->size, prz); - start += desc->size; - } - } - - return -EINVAL; -} - -static __init -struct persistent_ram_zone *__persistent_ram_init(struct device *dev, bool ecc) -{ - struct persistent_ram_zone *prz; - int ret = -ENOMEM; - - prz = kzalloc(sizeof(struct persistent_ram_zone), GFP_KERNEL); - if (!prz) { - pr_err("persistent_ram: failed to allocate persistent ram zone\n"); - goto err; - } - - ret = persistent_ram_buffer_init(dev_name(dev), prz); - if (ret) { - pr_err("persistent_ram: failed to initialize buffer\n"); - goto err; - } - - persistent_ram_post_init(prz, ecc); - - return prz; -err: - kfree(prz); - return ERR_PTR(ret); -} - -struct persistent_ram_zone * __init -persistent_ram_init_ringbuffer(struct device *dev, bool ecc) -{ - return __persistent_ram_init(dev, ecc); -} - -int __init persistent_ram_early_init(struct persistent_ram *ram) -{ - int ret; - - ret = memblock_reserve(ram->start, ram->size); - if (ret) { - pr_err("Failed to reserve persistent memory from %08lx-%08lx\n", - (long)ram->start, (long)(ram->start + ram->size - 1)); - return ret; - } - - list_add_tail(&ram->node, &persistent_ram_list); - - pr_info("Initialized persistent memory from %08lx-%08lx\n", - (long)ram->start, (long)(ram->start + ram->size - 1)); - - return 0; -} -#endif diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index 9385d41cb1c3..2470bb591434 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -25,21 +25,6 @@ struct persistent_ram_buffer; -struct persistent_ram_descriptor { - const char *name; - phys_addr_t size; -}; - -struct persistent_ram { - phys_addr_t start; - phys_addr_t size; - - int num_descs; - struct persistent_ram_descriptor *descs; - - struct list_head node; -}; - struct persistent_ram_zone { phys_addr_t paddr; size_t size; @@ -63,15 +48,11 @@ struct persistent_ram_zone { size_t old_log_size; }; -int persistent_ram_early_init(struct persistent_ram *ram); - struct persistent_ram_zone * __init persistent_ram_new(phys_addr_t start, size_t size, bool ecc); void persistent_ram_free(struct persistent_ram_zone *prz); void persistent_ram_zap(struct persistent_ram_zone *prz); -struct persistent_ram_zone *persistent_ram_init_ringbuffer(struct device *dev, - bool ecc); int persistent_ram_write(struct persistent_ram_zone *prz, const void *s, unsigned int count); -- cgit v1.2.3 From 33e0c249801c6913b2bd102683ab65ab61e12952 Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Fri, 15 Jun 2012 19:25:25 +0200 Subject: iio: iio/machine.h typo Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/machine.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/iio/machine.h b/include/linux/iio/machine.h index 0b1f19bfdc44..400a453ff67b 100644 --- a/include/linux/iio/machine.h +++ b/include/linux/iio/machine.h @@ -14,7 +14,7 @@ * This is matched against the datasheet_name element * of struct iio_chan_spec. * @consumer_dev_name: Name to uniquely identify the consumer device. - * @consumer_channel: Unique name used to idenitify the channel on the + * @consumer_channel: Unique name used to identify the channel on the * consumer side. */ struct iio_map { -- cgit v1.2.3 From fb1c4bcd721fcc30d6e43f60a244483dc0d07056 Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Fri, 15 Jun 2012 19:25:28 +0200 Subject: iio: iio/events.h typos Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/events.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/iio/events.h b/include/linux/iio/events.h index b5acbf93c5da..13ce220c7003 100644 --- a/include/linux/iio/events.h +++ b/include/linux/iio/events.h @@ -46,7 +46,7 @@ enum iio_event_direction { * @diff: Whether the event is for an differential channel or not. * @modifier: Modifier for the channel. Should be one of enum iio_modifier. * @direction: Direction of the event. One of enum iio_event_direction. - * @type: Type of the event. Should be one enum iio_event_type. + * @type: Type of the event. Should be one of enum iio_event_type. * @chan: Channel number for non-differential channels. * @chan1: First channel number for differential channels. * @chan2: Second channel number for differential channels. @@ -69,7 +69,7 @@ enum iio_event_direction { * @chan_type: Type of the channel. Should be one of enum iio_chan_type. * @number: Channel number. * @modifier: Modifier for the channel. Should be one of enum iio_modifier. - * @type: Type of the event. Should be one enum iio_event_type. + * @type: Type of the event. Should be one of enum iio_event_type. * @direction: Direction of the event. One of enum iio_event_direction. */ @@ -81,7 +81,7 @@ enum iio_event_direction { * IIO_UNMOD_EVENT_CODE() - create event identifier for unmodified channels * @chan_type: Type of the channel. Should be one of enum iio_chan_type. * @number: Channel number. - * @type: Type of the event. Should be one enum iio_event_type. + * @type: Type of the event. Should be one of enum iio_event_type. * @direction: Direction of the event. One of enum iio_event_direction. */ -- cgit v1.2.3 From 23f2d735a932c7833d2d00da5e3ecdf4a6836210 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 18 Jun 2012 18:33:48 +0200 Subject: iio: Add helper function for initializing triggered buffers Add a helper function for executing the common tasks which are usually involved in setting up a simple software ringbuffer. It will allocate the buffer, allocate the pollfunc and register the buffer. Signed-off-by: Lars-Peter Clausen Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/Kconfig | 7 ++ drivers/iio/Makefile | 1 + drivers/iio/industrialio-triggered-buffer.c | 110 ++++++++++++++++++++++++++++ include/linux/iio/triggered_buffer.h | 15 ++++ 4 files changed, 133 insertions(+) create mode 100644 drivers/iio/industrialio-triggered-buffer.c create mode 100644 include/linux/iio/triggered_buffer.h (limited to 'include/linux') diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index 103349f2b3b5..612073f6c540 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -30,6 +30,13 @@ config IIO_KFIFO_BUF no buffer events so it is up to userspace to work out how often to read from the buffer. +config IIO_TRIGGERED_BUFFER + tristate + select IIO_TRIGGER + select IIO_KFIFO_BUF + help + Provides helper functions for setting up triggered buffers. + endif # IIO_BUFFER config IIO_TRIGGER diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile index c38fa2a40af2..34309abb7979 100644 --- a/drivers/iio/Makefile +++ b/drivers/iio/Makefile @@ -7,6 +7,7 @@ industrialio-y := industrialio-core.o industrialio-event.o inkern.o industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o +obj-$(CONFIG_IIO_TRIGGERED_BUFFER) += industrialio-triggered-buffer.o obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o obj-y += adc/ diff --git a/drivers/iio/industrialio-triggered-buffer.c b/drivers/iio/industrialio-triggered-buffer.c new file mode 100644 index 000000000000..46c619b0d8c5 --- /dev/null +++ b/drivers/iio/industrialio-triggered-buffer.c @@ -0,0 +1,110 @@ + /* + * Copyright (c) 2012 Analog Devices, Inc. + * Author: Lars-Peter Clausen + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { + .preenable = &iio_sw_buffer_preenable, + .postenable = &iio_triggered_buffer_postenable, + .predisable = &iio_triggered_buffer_predisable, +}; + +/** + * iio_triggered_buffer_setup() - Setup triggered buffer and pollfunc + * @indio_dev: IIO device structure + * @pollfunc_bh: Function which will be used as pollfunc bottom half + * @pollfunc_th: Function which will be used as pollfunc top half + * @setup_ops: Buffer setup functions to use for this device. + * If NULL the default setup functions for triggered + * buffers will be used. + * + * This function combines some common tasks which will normally be performed + * when setting up a triggered buffer. It will allocate the buffer and the + * pollfunc, as well as register the buffer with the IIO core. + * + * Before calling this function the indio_dev structure should already be + * completely initialized, but not yet registered. In practice this means that + * this function should be called right before iio_device_register(). + * + * To free the resources allocated by this function call + * iio_triggered_buffer_cleanup(). + */ +int iio_triggered_buffer_setup(struct iio_dev *indio_dev, + irqreturn_t (*pollfunc_bh)(int irq, void *p), + irqreturn_t (*pollfunc_th)(int irq, void *p), + const struct iio_buffer_setup_ops *setup_ops) +{ + int ret; + + indio_dev->buffer = iio_kfifo_allocate(indio_dev); + if (!indio_dev->buffer) { + ret = -ENOMEM; + goto error_ret; + } + + indio_dev->pollfunc = iio_alloc_pollfunc(pollfunc_bh, + pollfunc_th, + IRQF_ONESHOT, + indio_dev, + "%s_consumer%d", + indio_dev->name, + indio_dev->id); + if (indio_dev->pollfunc == NULL) { + ret = -ENOMEM; + goto error_kfifo_free; + } + + /* Ring buffer functions - here trigger setup related */ + if (setup_ops) + indio_dev->setup_ops = setup_ops; + else + indio_dev->setup_ops = &iio_triggered_buffer_setup_ops; + + /* Flag that polled ring buffering is possible */ + indio_dev->modes |= INDIO_BUFFER_TRIGGERED; + + ret = iio_buffer_register(indio_dev, + indio_dev->channels, + indio_dev->num_channels); + if (ret) + goto error_dealloc_pollfunc; + + return 0; + +error_dealloc_pollfunc: + iio_dealloc_pollfunc(indio_dev->pollfunc); +error_kfifo_free: + iio_kfifo_free(indio_dev->buffer); +error_ret: + return ret; +} +EXPORT_SYMBOL(iio_triggered_buffer_setup); + +/** + * iio_triggered_buffer_cleanup() - Free resources allocated by iio_triggered_buffer_setup() + * @indio_dev: IIO device structure + */ +void iio_triggered_buffer_cleanup(struct iio_dev *indio_dev) +{ + iio_buffer_unregister(indio_dev); + iio_dealloc_pollfunc(indio_dev->pollfunc); + iio_kfifo_free(indio_dev->buffer); +} +EXPORT_SYMBOL(iio_triggered_buffer_cleanup); + +MODULE_AUTHOR("Lars-Peter Clausen "); +MODULE_DESCRIPTION("IIO helper functions for setting up triggered buffers"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/iio/triggered_buffer.h b/include/linux/iio/triggered_buffer.h new file mode 100644 index 000000000000..c378ebec605e --- /dev/null +++ b/include/linux/iio/triggered_buffer.h @@ -0,0 +1,15 @@ +#ifndef _LINUX_IIO_TRIGGERED_BUFFER_H_ +#define _LINUX_IIO_TRIGGERED_BUFFER_H_ + +#include + +struct iio_dev; +struct iio_buffer_setup_ops; + +int iio_triggered_buffer_setup(struct iio_dev *indio_dev, + irqreturn_t (*pollfunc_bh)(int irq, void *p), + irqreturn_t (*pollfunc_th)(int irq, void *p), + const struct iio_buffer_setup_ops *setup_ops); +void iio_triggered_buffer_cleanup(struct iio_dev *indio_dev); + +#endif -- cgit v1.2.3 From 9cc113bc84e683435c110268712d25aea05b8198 Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Mon, 18 Jun 2012 20:33:01 +0200 Subject: iio: typo in iio_chan_spec.ext_info comment Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/iio.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index ae0cad908182..2afbb6f01afc 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -214,7 +214,7 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev, * @event_mask: What events can this channel produce. * @ext_info: Array of extended info attributes for this channel. * The array is NULL terminated, the last element should - * have it's name field set to NULL. + * have its name field set to NULL. * @extend_name: Allows labeling of channel attributes with an * informative name. Note this has no effect codes etc, * unlike modifiers. -- cgit v1.2.3 From b90406f1e5f4cb673e331ce6d435f4bdbf2136a2 Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Mon, 18 Jun 2012 20:33:02 +0200 Subject: iio: correct documentation for IIO_CONST_ATTR_SAMP_FREQ_AVAIL, match name of #define Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/sysfs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/iio/sysfs.h b/include/linux/iio/sysfs.h index bfedb73b850e..b7a934b9431b 100644 --- a/include/linux/iio/sysfs.h +++ b/include/linux/iio/sysfs.h @@ -97,7 +97,7 @@ struct iio_const_attr { #define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \ IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0) /** - * IIO_CONST_ATTR_AVAIL_SAMP_FREQ - list available sampling frequencies + * IIO_CONST_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies * @_string: frequency string for the attribute * * Constant version -- cgit v1.2.3 From 19ea4752fc1f45c778ae66443c1023aced14ba05 Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Mon, 18 Jun 2012 20:33:03 +0200 Subject: iio: remove extra ; after function definition Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- include/linux/iio/buffer.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index fb0fe46fd659..ad4fb1af0f7d 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -184,7 +184,7 @@ static inline int iio_buffer_register(struct iio_dev *indio_dev, } static inline void iio_buffer_unregister(struct iio_dev *indio_dev) -{}; +{} #endif /* CONFIG_IIO_BUFFER */ -- cgit v1.2.3 From 924d37118f9e18825294b2012a10c6245d6c25e1 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 18 Jun 2012 19:15:50 -0700 Subject: pstore/ram: Probe as early as possible Registering the platform driver before module_init allows us to log oopses that happen during device probing. This requires changing module_init to postcore_initcall, and switching from platform_driver_probe to platform_driver_register because the platform device is not registered when the platform driver is registered; and because we use driver_register, now can't use create_bundle() (since it will try to register the same driver once again), so we have to switch to platform_device_register_data(). Also, some __init -> __devinit changes were needed. Overall, the registration logic is now much clearer, since we have only one driver registration point, and just an optional dummy device, which is created from the module parameters. Suggested-by: Colin Cross Signed-off-by: Anton Vorontsov Acked-by: Kees Cook Signed-off-by: Greg Kroah-Hartman --- fs/pstore/ram.c | 63 +++++++++++++++++++++++----------------------- fs/pstore/ram_core.c | 9 ++++--- include/linux/pstore_ram.h | 6 ++--- 3 files changed, 40 insertions(+), 38 deletions(-) (limited to 'include/linux') diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index c7acf94ff475..0b36e91978e6 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -330,7 +330,7 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt, return 0; } -static int __init ramoops_probe(struct platform_device *pdev) +static int __devinit ramoops_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct ramoops_platform_data *pdata = pdev->dev.platform_data; @@ -452,6 +452,7 @@ static int __exit ramoops_remove(struct platform_device *pdev) } static struct platform_driver ramoops_driver = { + .probe = ramoops_probe, .remove = __exit_p(ramoops_remove), .driver = { .name = "ramoops", @@ -459,46 +460,46 @@ static struct platform_driver ramoops_driver = { }, }; -static int __init ramoops_init(void) +static void ramoops_register_dummy(void) { - int ret; - ret = platform_driver_probe(&ramoops_driver, ramoops_probe); - if (ret == -ENODEV) { - /* - * If we didn't find a platform device, we use module parameters - * building platform data on the fly. - */ - pr_info("platform device not found, using module parameters\n"); - dummy_data = kzalloc(sizeof(struct ramoops_platform_data), - GFP_KERNEL); - if (!dummy_data) - return -ENOMEM; - dummy_data->mem_size = mem_size; - dummy_data->mem_address = mem_address; - dummy_data->record_size = record_size; - dummy_data->console_size = ramoops_console_size; - dummy_data->dump_oops = dump_oops; - dummy_data->ecc = ramoops_ecc; - dummy = platform_create_bundle(&ramoops_driver, ramoops_probe, - NULL, 0, dummy_data, - sizeof(struct ramoops_platform_data)); - - if (IS_ERR(dummy)) - ret = PTR_ERR(dummy); - else - ret = 0; + if (!mem_size) + return; + + pr_info("using module parameters\n"); + + dummy_data = kzalloc(sizeof(*dummy_data), GFP_KERNEL); + if (!dummy_data) { + pr_info("could not allocate pdata\n"); + return; } - return ret; + dummy_data->mem_size = mem_size; + dummy_data->mem_address = mem_address; + dummy_data->record_size = record_size; + dummy_data->console_size = ramoops_console_size; + dummy_data->dump_oops = dump_oops; + dummy_data->ecc = ramoops_ecc; + + dummy = platform_device_register_data(NULL, "ramoops", -1, + dummy_data, sizeof(struct ramoops_platform_data)); + if (IS_ERR(dummy)) { + pr_info("could not create platform device: %ld\n", + PTR_ERR(dummy)); + } +} + +static int __init ramoops_init(void) +{ + ramoops_register_dummy(); + return platform_driver_register(&ramoops_driver); } +postcore_initcall(ramoops_init); static void __exit ramoops_exit(void) { platform_driver_unregister(&ramoops_driver); kfree(dummy_data); } - -module_init(ramoops_init); module_exit(ramoops_exit); MODULE_LICENSE("GPL"); diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index 0fd81611525c..26531856daf8 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -390,7 +390,8 @@ static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size, return 0; } -static int __init persistent_ram_post_init(struct persistent_ram_zone *prz, bool ecc) +static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, + bool ecc) { int ret; @@ -436,9 +437,9 @@ void persistent_ram_free(struct persistent_ram_zone *prz) kfree(prz); } -struct persistent_ram_zone * __init persistent_ram_new(phys_addr_t start, - size_t size, - bool ecc) +struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, + size_t size, + bool ecc) { struct persistent_ram_zone *prz; int ret = -ENOMEM; diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index 2470bb591434..e681af92c04b 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -48,9 +48,9 @@ struct persistent_ram_zone { size_t old_log_size; }; -struct persistent_ram_zone * __init persistent_ram_new(phys_addr_t start, - size_t size, - bool ecc); +struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, + size_t size, + bool ecc); void persistent_ram_free(struct persistent_ram_zone *prz); void persistent_ram_zap(struct persistent_ram_zone *prz); -- cgit v1.2.3 From 8ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 25 Jun 2012 14:52:49 +0200 Subject: iio:adc: Add AD7265/AD7266 support This patch adds support for the Analog Devices AD7265 and AD7266 Analog-to-Digital converters. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/iio/adc/Kconfig | 10 + drivers/iio/adc/Makefile | 1 + drivers/iio/adc/ad7266.c | 536 +++++++++++++++++++++++++++++++++++ include/linux/platform_data/ad7266.h | 54 ++++ 4 files changed, 601 insertions(+) create mode 100644 drivers/iio/adc/ad7266.c create mode 100644 include/linux/platform_data/ad7266.h (limited to 'include/linux') diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 4f7f584cfd61..8a78b4f3ef58 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -3,6 +3,16 @@ # menu "Analog to digital converters" +config AD7266 + tristate "Analog Devices AD7265/AD7266 ADC driver" + depends on SPI_MASTER + select IIO_BUFFER + select IIO_TRIGGER + select IIO_TRIGGERED_BUFFER + help + Say yes here to build support for Analog Devices AD7265 and AD7266 + ADCs. + config AT91_ADC tristate "Atmel AT91 ADC" depends on ARCH_AT91 diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 175c8d41ea99..52eec254c38c 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -2,4 +2,5 @@ # Makefile for IIO ADC drivers # +obj-$(CONFIG_AD7266) += ad7266.o obj-$(CONFIG_AT91_ADC) += at91_adc.o diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c new file mode 100644 index 000000000000..5c3f1ba5a06d --- /dev/null +++ b/drivers/iio/adc/ad7266.c @@ -0,0 +1,536 @@ +/* + * AD7266/65 SPI ADC driver + * + * Copyright 2012 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include + +#include + +struct ad7266_state { + struct spi_device *spi; + struct regulator *reg; + unsigned long vref_uv; + + struct spi_transfer single_xfer[3]; + struct spi_message single_msg; + + enum ad7266_range range; + enum ad7266_mode mode; + bool fixed_addr; + struct gpio gpios[3]; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + * The buffer needs to be large enough to hold two samples (4 bytes) and + * the naturally aligned timestamp (8 bytes). + */ + uint8_t data[ALIGN(4, sizeof(s64)) + sizeof(s64)] ____cacheline_aligned; +}; + +static int ad7266_wakeup(struct ad7266_state *st) +{ + /* Any read with >= 2 bytes will wake the device */ + return spi_read(st->spi, st->data, 2); +} + +static int ad7266_powerdown(struct ad7266_state *st) +{ + /* Any read with < 2 bytes will powerdown the device */ + return spi_read(st->spi, st->data, 1); +} + +static int ad7266_preenable(struct iio_dev *indio_dev) +{ + struct ad7266_state *st = iio_priv(indio_dev); + int ret; + + ret = ad7266_wakeup(st); + if (ret) + return ret; + + ret = iio_sw_buffer_preenable(indio_dev); + if (ret) + ad7266_powerdown(st); + + return ret; +} + +static int ad7266_postdisable(struct iio_dev *indio_dev) +{ + struct ad7266_state *st = iio_priv(indio_dev); + return ad7266_powerdown(st); +} + +static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { + .preenable = &ad7266_preenable, + .postenable = &iio_triggered_buffer_postenable, + .predisable = &iio_triggered_buffer_predisable, + .postdisable = &ad7266_postdisable, +}; + +static irqreturn_t ad7266_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct iio_buffer *buffer = indio_dev->buffer; + struct ad7266_state *st = iio_priv(indio_dev); + int ret; + + ret = spi_read(st->spi, st->data, 4); + if (ret == 0) { + if (indio_dev->scan_timestamp) + ((s64 *)st->data)[1] = pf->timestamp; + iio_push_to_buffer(buffer, (u8 *)st->data, pf->timestamp); + } + + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static void ad7266_select_input(struct ad7266_state *st, unsigned int nr) +{ + unsigned int i; + + if (st->fixed_addr) + return; + + switch (st->mode) { + case AD7266_MODE_SINGLE_ENDED: + nr >>= 1; + break; + case AD7266_MODE_PSEUDO_DIFF: + nr |= 1; + break; + case AD7266_MODE_DIFF: + nr &= ~1; + break; + } + + for (i = 0; i < 3; ++i) + gpio_set_value(st->gpios[i].gpio, (bool)(nr & BIT(i))); +} + +static int ad7266_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct ad7266_state *st = iio_priv(indio_dev); + unsigned int nr = find_first_bit(scan_mask, indio_dev->masklength); + + ad7266_select_input(st, nr); + + return 0; +} + +static int ad7266_read_single(struct ad7266_state *st, int *val, + unsigned int address) +{ + int ret; + + ad7266_select_input(st, address); + + ret = spi_sync(st->spi, &st->single_msg); + *val = be16_to_cpu(st->data[address % 2]); + + return ret; +} + +static int ad7266_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long m) +{ + struct ad7266_state *st = iio_priv(indio_dev); + unsigned long scale_uv; + int ret; + + switch (m) { + case IIO_CHAN_INFO_RAW: + if (iio_buffer_enabled(indio_dev)) + return -EBUSY; + + ret = ad7266_read_single(st, val, chan->address); + if (ret) + return ret; + + *val = (*val >> 2) & 0xfff; + if (chan->scan_type.sign == 's') + *val = sign_extend32(*val, 11); + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + scale_uv = (st->vref_uv * 100); + if (st->mode == AD7266_MODE_DIFF) + scale_uv *= 2; + if (st->range == AD7266_RANGE_2VREF) + scale_uv *= 2; + + scale_uv >>= chan->scan_type.realbits; + *val = scale_uv / 100000; + *val2 = (scale_uv % 100000) * 10; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_OFFSET: + if (st->range == AD7266_RANGE_2VREF && + st->mode != AD7266_MODE_DIFF) + *val = 2048; + else + *val = 0; + return IIO_VAL_INT; + } + return -EINVAL; +} + +#define AD7266_CHAN(_chan, _sign) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = (_chan), \ + .address = (_chan), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT \ + | IIO_CHAN_INFO_SCALE_SHARED_BIT \ + | IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ + .scan_index = (_chan), \ + .scan_type = { \ + .sign = (_sign), \ + .realbits = 12, \ + .storagebits = 16, \ + .shift = 2, \ + .endianness = IIO_BE, \ + }, \ +} + +#define AD7266_DECLARE_SINGLE_ENDED_CHANNELS(_name, _sign) \ +const struct iio_chan_spec ad7266_channels_##_name[] = { \ + AD7266_CHAN(0, (_sign)), \ + AD7266_CHAN(1, (_sign)), \ + AD7266_CHAN(2, (_sign)), \ + AD7266_CHAN(3, (_sign)), \ + AD7266_CHAN(4, (_sign)), \ + AD7266_CHAN(5, (_sign)), \ + AD7266_CHAN(6, (_sign)), \ + AD7266_CHAN(7, (_sign)), \ + AD7266_CHAN(8, (_sign)), \ + AD7266_CHAN(9, (_sign)), \ + AD7266_CHAN(10, (_sign)), \ + AD7266_CHAN(11, (_sign)), \ + IIO_CHAN_SOFT_TIMESTAMP(13), \ +} + +#define AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(_name, _sign) \ +const struct iio_chan_spec ad7266_channels_##_name##_fixed[] = { \ + AD7266_CHAN(0, (_sign)), \ + AD7266_CHAN(1, (_sign)), \ + IIO_CHAN_SOFT_TIMESTAMP(2), \ +} + +static AD7266_DECLARE_SINGLE_ENDED_CHANNELS(u, 'u'); +static AD7266_DECLARE_SINGLE_ENDED_CHANNELS(s, 's'); +static AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(u, 'u'); +static AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(s, 's'); + +#define AD7266_CHAN_DIFF(_chan, _sign) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = (_chan) * 2, \ + .channel2 = (_chan) * 2 + 1, \ + .address = (_chan), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT \ + | IIO_CHAN_INFO_SCALE_SHARED_BIT \ + | IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ + .scan_index = (_chan), \ + .scan_type = { \ + .sign = _sign, \ + .realbits = 12, \ + .storagebits = 16, \ + .shift = 2, \ + .endianness = IIO_BE, \ + }, \ + .differential = 1, \ +} + +#define AD7266_DECLARE_DIFF_CHANNELS(_name, _sign) \ +const struct iio_chan_spec ad7266_channels_diff_##_name[] = { \ + AD7266_CHAN_DIFF(0, (_sign)), \ + AD7266_CHAN_DIFF(1, (_sign)), \ + AD7266_CHAN_DIFF(2, (_sign)), \ + AD7266_CHAN_DIFF(3, (_sign)), \ + AD7266_CHAN_DIFF(4, (_sign)), \ + AD7266_CHAN_DIFF(5, (_sign)), \ + IIO_CHAN_SOFT_TIMESTAMP(6), \ +} + +static AD7266_DECLARE_DIFF_CHANNELS(s, 's'); +static AD7266_DECLARE_DIFF_CHANNELS(u, 'u'); + +#define AD7266_DECLARE_DIFF_CHANNELS_FIXED(_name, _sign) \ +const struct iio_chan_spec ad7266_channels_diff_fixed_##_name[] = { \ + AD7266_CHAN_DIFF(0, (_sign)), \ + AD7266_CHAN_DIFF(1, (_sign)), \ + IIO_CHAN_SOFT_TIMESTAMP(2), \ +} + +static AD7266_DECLARE_DIFF_CHANNELS_FIXED(s, 's'); +static AD7266_DECLARE_DIFF_CHANNELS_FIXED(u, 'u'); + +static const struct iio_info ad7266_info = { + .read_raw = &ad7266_read_raw, + .update_scan_mode = &ad7266_update_scan_mode, + .driver_module = THIS_MODULE, +}; + +static unsigned long ad7266_available_scan_masks[] = { + 0x003, + 0x00c, + 0x030, + 0x0c0, + 0x300, + 0xc00, + 0x000, +}; + +static unsigned long ad7266_available_scan_masks_diff[] = { + 0x003, + 0x00c, + 0x030, + 0x000, +}; + +static unsigned long ad7266_available_scan_masks_fixed[] = { + 0x003, + 0x000, +}; + +struct ad7266_chan_info { + const struct iio_chan_spec *channels; + unsigned int num_channels; + unsigned long *scan_masks; +}; + +#define AD7266_CHAN_INFO_INDEX(_differential, _signed, _fixed) \ + (((_differential) << 2) | ((_signed) << 1) | ((_fixed) << 0)) + +static const struct ad7266_chan_info ad7266_chan_infos[] = { + [AD7266_CHAN_INFO_INDEX(0, 0, 0)] = { + .channels = ad7266_channels_u, + .num_channels = ARRAY_SIZE(ad7266_channels_u), + .scan_masks = ad7266_available_scan_masks, + }, + [AD7266_CHAN_INFO_INDEX(0, 0, 1)] = { + .channels = ad7266_channels_u_fixed, + .num_channels = ARRAY_SIZE(ad7266_channels_u_fixed), + .scan_masks = ad7266_available_scan_masks_fixed, + }, + [AD7266_CHAN_INFO_INDEX(0, 1, 0)] = { + .channels = ad7266_channels_s, + .num_channels = ARRAY_SIZE(ad7266_channels_s), + .scan_masks = ad7266_available_scan_masks, + }, + [AD7266_CHAN_INFO_INDEX(0, 1, 1)] = { + .channels = ad7266_channels_s_fixed, + .num_channels = ARRAY_SIZE(ad7266_channels_s_fixed), + .scan_masks = ad7266_available_scan_masks_fixed, + }, + [AD7266_CHAN_INFO_INDEX(1, 0, 0)] = { + .channels = ad7266_channels_diff_u, + .num_channels = ARRAY_SIZE(ad7266_channels_diff_u), + .scan_masks = ad7266_available_scan_masks_diff, + }, + [AD7266_CHAN_INFO_INDEX(1, 0, 1)] = { + .channels = ad7266_channels_diff_fixed_u, + .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_u), + .scan_masks = ad7266_available_scan_masks_fixed, + }, + [AD7266_CHAN_INFO_INDEX(1, 1, 0)] = { + .channels = ad7266_channels_diff_s, + .num_channels = ARRAY_SIZE(ad7266_channels_diff_s), + .scan_masks = ad7266_available_scan_masks_diff, + }, + [AD7266_CHAN_INFO_INDEX(1, 1, 1)] = { + .channels = ad7266_channels_diff_fixed_s, + .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_s), + .scan_masks = ad7266_available_scan_masks_fixed, + }, +}; + +static void __devinit ad7266_init_channels(struct iio_dev *indio_dev) +{ + struct ad7266_state *st = iio_priv(indio_dev); + bool is_differential, is_signed; + const struct ad7266_chan_info *chan_info; + int i; + + is_differential = st->mode != AD7266_MODE_SINGLE_ENDED; + is_signed = (st->range == AD7266_RANGE_2VREF) | + (st->mode == AD7266_MODE_DIFF); + + i = AD7266_CHAN_INFO_INDEX(is_differential, is_signed, st->fixed_addr); + chan_info = &ad7266_chan_infos[i]; + + indio_dev->channels = chan_info->channels; + indio_dev->num_channels = chan_info->num_channels; + indio_dev->available_scan_masks = chan_info->scan_masks; + indio_dev->masklength = chan_info->num_channels - 1; +} + +static const char * const ad7266_gpio_labels[] = { + "AD0", "AD1", "AD2", +}; + +static int __devinit ad7266_probe(struct spi_device *spi) +{ + struct ad7266_platform_data *pdata = spi->dev.platform_data; + struct iio_dev *indio_dev; + struct ad7266_state *st; + unsigned int i; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + + st->reg = regulator_get(&spi->dev, "vref"); + if (!IS_ERR_OR_NULL(st->reg)) { + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + + st->vref_uv = regulator_get_voltage(st->reg); + } else { + /* Use internal reference */ + st->vref_uv = 2500000; + } + + if (pdata) { + st->fixed_addr = pdata->fixed_addr; + st->mode = pdata->mode; + st->range = pdata->range; + + if (!st->fixed_addr) { + for (i = 0; i < ARRAY_SIZE(st->gpios); ++i) { + st->gpios[i].gpio = pdata->addr_gpios[i]; + st->gpios[i].flags = GPIOF_OUT_INIT_LOW; + st->gpios[i].label = ad7266_gpio_labels[i]; + } + ret = gpio_request_array(st->gpios, + ARRAY_SIZE(st->gpios)); + if (ret) + goto error_disable_reg; + } + } else { + st->fixed_addr = true; + st->range = AD7266_RANGE_VREF; + st->mode = AD7266_MODE_DIFF; + } + + spi_set_drvdata(spi, indio_dev); + st->spi = spi; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &ad7266_info; + + ad7266_init_channels(indio_dev); + + /* wakeup */ + st->single_xfer[0].rx_buf = &st->data; + st->single_xfer[0].len = 2; + st->single_xfer[0].cs_change = 1; + /* conversion */ + st->single_xfer[1].rx_buf = &st->data; + st->single_xfer[1].len = 4; + st->single_xfer[1].cs_change = 1; + /* powerdown */ + st->single_xfer[2].tx_buf = &st->data; + st->single_xfer[2].len = 1; + + spi_message_init(&st->single_msg); + spi_message_add_tail(&st->single_xfer[0], &st->single_msg); + spi_message_add_tail(&st->single_xfer[1], &st->single_msg); + spi_message_add_tail(&st->single_xfer[2], &st->single_msg); + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + &ad7266_trigger_handler, &iio_triggered_buffer_setup_ops); + if (ret) + goto error_free_gpios; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_buffer_cleanup; + + return 0; + +error_buffer_cleanup: + iio_triggered_buffer_cleanup(indio_dev); +error_free_gpios: + if (!st->fixed_addr) + gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); +error_disable_reg: + if (!IS_ERR_OR_NULL(st->reg)) + regulator_disable(st->reg); +error_put_reg: + if (!IS_ERR_OR_NULL(st->reg)) + regulator_put(st->reg); + + iio_device_free(indio_dev); + + return ret; +} + +static int __devexit ad7266_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad7266_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + if (!st->fixed_addr) + gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); + if (!IS_ERR_OR_NULL(st->reg)) { + regulator_disable(st->reg); + regulator_put(st->reg); + } + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad7266_id[] = { + {"ad7265", 0}, + {"ad7266", 0}, + { } +}; +MODULE_DEVICE_TABLE(spi, ad7266_id); + +static struct spi_driver ad7266_driver = { + .driver = { + .name = "ad7266", + .owner = THIS_MODULE, + }, + .probe = ad7266_probe, + .remove = __devexit_p(ad7266_remove), + .id_table = ad7266_id, +}; +module_spi_driver(ad7266_driver); + +MODULE_AUTHOR("Lars-Peter Clausen "); +MODULE_DESCRIPTION("Analog Devices AD7266/65 ADC"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/platform_data/ad7266.h b/include/linux/platform_data/ad7266.h new file mode 100644 index 000000000000..eabfdcb26992 --- /dev/null +++ b/include/linux/platform_data/ad7266.h @@ -0,0 +1,54 @@ +/* + * AD7266/65 SPI ADC driver + * + * Copyright 2012 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#ifndef __IIO_ADC_AD7266_H__ +#define __IIO_ADC_AD7266_H__ + +/** + * enum ad7266_range - AD7266 reference voltage range + * @AD7266_RANGE_VREF: Device is configured for input range 0V - VREF + * (RANGE pin set to low) + * @AD7266_RANGE_2VREF: Device is configured for input range 0V - 2VREF + * (RANGE pin set to high) + */ +enum ad7266_range { + AD7266_RANGE_VREF, + AD7266_RANGE_2VREF, +}; + +/** + * enum ad7266_mode - AD7266 sample mode + * @AD7266_MODE_DIFF: Device is configured for full differential mode + * (SGL/DIFF pin set to low, AD0 pin set to low) + * @AD7266_MODE_PSEUDO_DIFF: Device is configured for pseudo differential mode + * (SGL/DIFF pin set to low, AD0 pin set to high) + * @AD7266_MODE_SINGLE_ENDED: Device is configured for single-ended mode + * (SGL/DIFF pin set to high) + */ +enum ad7266_mode { + AD7266_MODE_DIFF, + AD7266_MODE_PSEUDO_DIFF, + AD7266_MODE_SINGLE_ENDED, +}; + +/** + * struct ad7266_platform_data - Platform data for the AD7266 driver + * @range: Reference voltage range the device is configured for + * @mode: Sample mode the device is configured for + * @fixed_addr: Whether the address pins are hard-wired + * @addr_gpios: GPIOs used for controlling the address pins, only used if + * fixed_addr is set to false. + */ +struct ad7266_platform_data { + enum ad7266_range range; + enum ad7266_mode mode; + bool fixed_addr; + unsigned int addr_gpios[3]; +}; + +#endif -- cgit v1.2.3 From 314be14bb89369b2164125b0ec3b24d85b407b62 Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Tue, 1 May 2012 21:04:24 +0100 Subject: iio: Rename _st_ functions to loose the bit that meant the staging version. These were originally introduced when the plan was to have parallel IIO cores in and out of staging with a slow move between them. Now we have reached the point where the whole core has moved, they need clearing up! Signed-off-by: Jonathan Cameron --- drivers/iio/inkern.c | 33 +++++++++++++++------------------ drivers/staging/iio/iio_hwmon.c | 12 ++++++------ include/linux/iio/consumer.h | 34 +++++++++++++++++----------------- 3 files changed, 38 insertions(+), 41 deletions(-) (limited to 'include/linux') diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index d4760bd1e9b1..9a46ca61ef02 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -92,8 +92,7 @@ error_ret: EXPORT_SYMBOL_GPL(iio_map_array_unregister); static const struct iio_chan_spec -*iio_chan_spec_from_name(const struct iio_dev *indio_dev, - const char *name) +*iio_chan_spec_from_name(const struct iio_dev *indio_dev, const char *name) { int i; const struct iio_chan_spec *chan = NULL; @@ -108,8 +107,7 @@ static const struct iio_chan_spec } -struct iio_channel *iio_st_channel_get(const char *name, - const char *channel_name) +struct iio_channel *iio_channel_get(const char *name, const char *channel_name) { struct iio_map_internal *c_i = NULL, *c = NULL; struct iio_channel *channel; @@ -145,16 +143,16 @@ struct iio_channel *iio_st_channel_get(const char *name, return channel; } -EXPORT_SYMBOL_GPL(iio_st_channel_get); +EXPORT_SYMBOL_GPL(iio_channel_get); -void iio_st_channel_release(struct iio_channel *channel) +void iio_channel_release(struct iio_channel *channel) { iio_device_put(channel->indio_dev); kfree(channel); } -EXPORT_SYMBOL_GPL(iio_st_channel_release); +EXPORT_SYMBOL_GPL(iio_channel_release); -struct iio_channel *iio_st_channel_get_all(const char *name) +struct iio_channel *iio_channel_get_all(const char *name) { struct iio_channel *chans; struct iio_map_internal *c = NULL; @@ -217,9 +215,9 @@ error_ret: return ERR_PTR(ret); } -EXPORT_SYMBOL_GPL(iio_st_channel_get_all); +EXPORT_SYMBOL_GPL(iio_channel_get_all); -void iio_st_channel_release_all(struct iio_channel *channels) +void iio_channel_release_all(struct iio_channel *channels) { struct iio_channel *chan = &channels[0]; @@ -229,9 +227,9 @@ void iio_st_channel_release_all(struct iio_channel *channels) } kfree(channels); } -EXPORT_SYMBOL_GPL(iio_st_channel_release_all); +EXPORT_SYMBOL_GPL(iio_channel_release_all); -int iio_st_read_channel_raw(struct iio_channel *chan, int *val) +int iio_read_channel_raw(struct iio_channel *chan, int *val) { int val2, ret; @@ -248,9 +246,9 @@ err_unlock: return ret; } -EXPORT_SYMBOL_GPL(iio_st_read_channel_raw); +EXPORT_SYMBOL_GPL(iio_read_channel_raw); -int iio_st_read_channel_scale(struct iio_channel *chan, int *val, int *val2) +int iio_read_channel_scale(struct iio_channel *chan, int *val, int *val2) { int ret; @@ -269,10 +267,9 @@ err_unlock: return ret; } -EXPORT_SYMBOL_GPL(iio_st_read_channel_scale); +EXPORT_SYMBOL_GPL(iio_read_channel_scale); -int iio_st_get_channel_type(struct iio_channel *chan, - enum iio_chan_type *type) +int iio_get_channel_type(struct iio_channel *chan, enum iio_chan_type *type) { int ret = 0; /* Need to verify underlying driver has not gone away */ @@ -289,4 +286,4 @@ err_unlock: return ret; } -EXPORT_SYMBOL_GPL(iio_st_get_channel_type); +EXPORT_SYMBOL_GPL(iio_get_channel_type); diff --git a/drivers/staging/iio/iio_hwmon.c b/drivers/staging/iio/iio_hwmon.c index b03554fee443..27d27ec9521f 100644 --- a/drivers/staging/iio/iio_hwmon.c +++ b/drivers/staging/iio/iio_hwmon.c @@ -51,12 +51,12 @@ static ssize_t iio_hwmon_read_val(struct device *dev, * No locking between this pair, so theoretically possible * the scale has changed. */ - ret = iio_st_read_channel_raw(&state->channels[sattr->index], + ret = iio_read_channel_raw(&state->channels[sattr->index], &val); if (ret < 0) return ret; - ret = iio_st_read_channel_scale(&state->channels[sattr->index], + ret = iio_read_channel_scale(&state->channels[sattr->index], &scaleint, &scalepart); if (ret < 0) return ret; @@ -106,7 +106,7 @@ static int __devinit iio_hwmon_probe(struct platform_device *pdev) goto error_ret; } - st->channels = iio_st_channel_get_all(dev_name(&pdev->dev)); + st->channels = iio_channel_get_all(dev_name(&pdev->dev)); if (IS_ERR(st->channels)) { ret = PTR_ERR(st->channels); goto error_free_state; @@ -130,7 +130,7 @@ static int __devinit iio_hwmon_probe(struct platform_device *pdev) } sysfs_attr_init(&a->dev_attr.attr); - ret = iio_st_get_channel_type(&st->channels[i], &type); + ret = iio_get_channel_type(&st->channels[i], &type); if (ret < 0) { kfree(a); goto error_free_attrs; @@ -186,7 +186,7 @@ error_free_attrs: iio_hwmon_free_attrs(st); kfree(st->attrs); error_release_channels: - iio_st_channel_release_all(st->channels); + iio_channel_release_all(st->channels); error_free_state: kfree(st); error_ret: @@ -201,7 +201,7 @@ static int __devexit iio_hwmon_remove(struct platform_device *pdev) sysfs_remove_group(&pdev->dev.kobj, &st->attr_group); iio_hwmon_free_attrs(st); kfree(st->attrs); - iio_st_channel_release_all(st->channels); + iio_channel_release_all(st->channels); return 0; } diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index 1a15e560a5a1..e2657e6d4d26 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -33,17 +33,17 @@ struct iio_channel { * side. This typically describes the channels use within * the consumer. E.g. 'battery_voltage' */ -struct iio_channel *iio_st_channel_get(const char *name, - const char *consumer_channel); +struct iio_channel *iio_channel_get(const char *name, + const char *consumer_channel); /** - * iio_st_channel_release() - release channels obtained via iio_st_channel_get + * iio_channel_release() - release channels obtained via iio_channel_get * @chan: The channel to be released. */ -void iio_st_channel_release(struct iio_channel *chan); +void iio_channel_release(struct iio_channel *chan); /** - * iio_st_channel_get_all() - get all channels associated with a client + * iio_channel_get_all() - get all channels associated with a client * @name: name of consumer device. * * Returns an array of iio_channel structures terminated with one with @@ -51,37 +51,37 @@ void iio_st_channel_release(struct iio_channel *chan); * This function is used by fairly generic consumers to get all the * channels registered as having this consumer. */ -struct iio_channel *iio_st_channel_get_all(const char *name); +struct iio_channel *iio_channel_get_all(const char *name); /** - * iio_st_channel_release_all() - reverse iio_st_get_all + * iio_channel_release_all() - reverse iio_channel_get_all * @chan: Array of channels to be released. */ -void iio_st_channel_release_all(struct iio_channel *chan); +void iio_channel_release_all(struct iio_channel *chan); /** - * iio_st_read_channel_raw() - read from a given channel + * iio_read_channel_raw() - read from a given channel * @channel: The channel being queried. * @val: Value read back. * * Note raw reads from iio channels are in adc counts and hence * scale will need to be applied if standard units required. */ -int iio_st_read_channel_raw(struct iio_channel *chan, - int *val); +int iio_read_channel_raw(struct iio_channel *chan, + int *val); /** - * iio_st_get_channel_type() - get the type of a channel + * iio_get_channel_type() - get the type of a channel * @channel: The channel being queried. * @type: The type of the channel. * * returns the enum iio_chan_type of the channel */ -int iio_st_get_channel_type(struct iio_channel *channel, - enum iio_chan_type *type); +int iio_get_channel_type(struct iio_channel *channel, + enum iio_chan_type *type); /** - * iio_st_read_channel_scale() - read the scale value for a channel + * iio_read_channel_scale() - read the scale value for a channel * @channel: The channel being queried. * @val: First part of value read back. * @val2: Second part of value read back. @@ -90,7 +90,7 @@ int iio_st_get_channel_type(struct iio_channel *channel, * as IIO_VAL_INT_PLUS_MICRO telling us we have a value of val * + val2/1e6 */ -int iio_st_read_channel_scale(struct iio_channel *chan, int *val, - int *val2); +int iio_read_channel_scale(struct iio_channel *chan, int *val, + int *val2); #endif -- cgit v1.2.3 From 8f5879b20be7f918cdc4b3d831cfd8f3dc02c74c Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Sat, 5 May 2012 10:39:22 +0100 Subject: IIO: Add a modifier for sqrt(x^2+y^2) There will probably be a number of such modifiers eventually but this one is used in the adis16204 accelerometer driver. Signed-off-by: Jonathan Cameron --- drivers/iio/industrialio-core.c | 1 + include/linux/iio/types.h | 1 + 2 files changed, 2 insertions(+) (limited to 'include/linux') diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index a5a446beb2fa..e42749ec5c3c 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -70,6 +70,7 @@ static const char * const iio_modifier_names[] = { [IIO_MOD_X] = "x", [IIO_MOD_Y] = "y", [IIO_MOD_Z] = "z", + [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)", [IIO_MOD_LIGHT_BOTH] = "both", [IIO_MOD_LIGHT_IR] = "ir", }; diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h index d086736a9033..210559ddf8a3 100644 --- a/include/linux/iio/types.h +++ b/include/linux/iio/types.h @@ -44,6 +44,7 @@ enum iio_modifier { IIO_MOD_X_OR_Y_OR_Z, IIO_MOD_LIGHT_BOTH, IIO_MOD_LIGHT_IR, + IIO_MOD_ROOT_SUM_SQUARED_X_Y, }; #define IIO_VAL_INT 1 -- cgit v1.2.3 From cf82cb8128496955a38fa62e1819ceb1d596e2eb Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Sat, 5 May 2012 10:56:41 +0100 Subject: IIO: Add a modifier for x^2+y^2+z^2 There will probably be a number of such modifiers eventually but this one is used in the adis16240 accelerometer driver. Signed-off-by: Jonathan Cameron --- drivers/iio/industrialio-core.c | 1 + include/linux/iio/types.h | 1 + 2 files changed, 2 insertions(+) (limited to 'include/linux') diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index e42749ec5c3c..bb3c692e49b8 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -71,6 +71,7 @@ static const char * const iio_modifier_names[] = { [IIO_MOD_Y] = "y", [IIO_MOD_Z] = "z", [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)", + [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2", [IIO_MOD_LIGHT_BOTH] = "both", [IIO_MOD_LIGHT_IR] = "ir", }; diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h index 210559ddf8a3..e25040173346 100644 --- a/include/linux/iio/types.h +++ b/include/linux/iio/types.h @@ -45,6 +45,7 @@ enum iio_modifier { IIO_MOD_LIGHT_BOTH, IIO_MOD_LIGHT_IR, IIO_MOD_ROOT_SUM_SQUARED_X_Y, + IIO_MOD_SUM_SQUARED_X_Y_Z, }; #define IIO_VAL_INT 1 -- cgit v1.2.3 From 3bdff937827da04b487f0a0ac6e1f3a9a1296878 Mon Sep 17 00:00:00 2001 From: Peter Meerwald Date: Sun, 1 Jul 2012 00:47:43 +0200 Subject: iio: cleanup buffer.h comments Signed-off-by: Peter Meerwald Signed-off-by: Jonathan Cameron --- include/linux/iio/buffer.h | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) (limited to 'include/linux') diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index ad4fb1af0f7d..2a2b6b4d8d05 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -85,7 +85,7 @@ struct iio_buffer { /** * iio_buffer_init() - Initialize the buffer structure - * @buffer: buffer to be initialized + * @buffer: buffer to be initialized **/ void iio_buffer_init(struct iio_buffer *buffer); @@ -107,8 +107,9 @@ int iio_scan_mask_query(struct iio_dev *indio_dev, /** * iio_scan_mask_set() - set particular bit in the scan mask - * @buffer: the buffer whose scan mask we are interested in - * @bit: the bit to be set. + * @indio_dev IIO device structure + * @buffer: the buffer whose scan mask we are interested in + * @bit: the bit to be set. **/ int iio_scan_mask_set(struct iio_dev *indio_dev, struct iio_buffer *buffer, int bit); @@ -116,8 +117,8 @@ int iio_scan_mask_set(struct iio_dev *indio_dev, /** * iio_push_to_buffer() - push to a registered buffer. * @buffer: IIO buffer structure for device - * @scan: Full scan. - * @timestamp: + * @data: the data to push to the buffer + * @timestamp: timestamp to associate with the data */ int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data, s64 timestamp); @@ -126,7 +127,9 @@ int iio_update_demux(struct iio_dev *indio_dev); /** * iio_buffer_register() - register the buffer with IIO core - * @indio_dev: device with the buffer to be registered + * @indio_dev: device with the buffer to be registered + * @channels: the channel descriptions used to construct buffer + * @num_channels: the number of channels **/ int iio_buffer_register(struct iio_dev *indio_dev, const struct iio_chan_spec *channels, @@ -134,7 +137,7 @@ int iio_buffer_register(struct iio_dev *indio_dev, /** * iio_buffer_unregister() - unregister the buffer from IIO core - * @indio_dev: the device with the buffer to be unregistered + * @indio_dev: the device with the buffer to be unregistered **/ void iio_buffer_unregister(struct iio_dev *indio_dev); -- cgit v1.2.3 From 939546d1a9f47ed169554c711e1e05965b84ffe1 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 9 Jul 2012 10:00:00 +0100 Subject: iio: Add callback to check whether a scan mask is valid This is useful for cases where the number of valid scan masks grows exponentially, but it is rather easy to check whether a mask is valid or not programmatically. An example of such a case is a device with multiple ADCs where each ADC has a upstream MUX, which allows to select from a number of physical channels. +-------+ +-------+ | | | | --- Channel 1 | ADC 1 |---| MUX 1 | --- ... | | | | --- Channel M +-------+ +-------+ . . . . . . . . . +-------+ +-------+ | | | | --- Channel M * N + 1 | ADC N |---| MUX N | --- ... | | | | --- Channel M * N + M +-------+ +-------+ The number of necessary scan masks for this case is (M+1)**N - 1, on the other hand it is easy to check whether subsets for each ADC of the scanmask have only one bit set. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/iio/industrialio-buffer.c | 27 ++++++++++++++++++++------- include/linux/iio/iio.h | 4 ++++ 2 files changed, 24 insertions(+), 7 deletions(-) (limited to 'include/linux') diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 3d8d187eef2a..cc5db36fb75a 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -570,6 +570,15 @@ int iio_sw_buffer_preenable(struct iio_dev *indio_dev) } EXPORT_SYMBOL(iio_sw_buffer_preenable); +static bool iio_validate_scan_mask(struct iio_dev *indio_dev, + const unsigned long *mask) +{ + if (!indio_dev->setup_ops->validate_scan_mask) + return true; + + return indio_dev->setup_ops->validate_scan_mask(indio_dev, mask); +} + /** * iio_scan_mask_set() - set particular bit in the scan mask * @buffer: the buffer whose scan mask we are interested in @@ -589,27 +598,31 @@ int iio_scan_mask_set(struct iio_dev *indio_dev, return -ENOMEM; if (!indio_dev->masklength) { WARN_ON("trying to set scanmask prior to registering buffer\n"); - kfree(trialmask); - return -EINVAL; + goto err_invalid_mask; } bitmap_copy(trialmask, buffer->scan_mask, indio_dev->masklength); set_bit(bit, trialmask); + if (!iio_validate_scan_mask(indio_dev, trialmask)) + goto err_invalid_mask; + if (indio_dev->available_scan_masks) { mask = iio_scan_mask_match(indio_dev->available_scan_masks, indio_dev->masklength, trialmask); - if (!mask) { - kfree(trialmask); - return -EINVAL; - } + if (!mask) + goto err_invalid_mask; } bitmap_copy(buffer->scan_mask, trialmask, indio_dev->masklength); kfree(trialmask); return 0; -}; + +err_invalid_mask: + kfree(trialmask); + return -EINVAL; +} EXPORT_SYMBOL_GPL(iio_scan_mask_set); int iio_scan_mask_query(struct iio_dev *indio_dev, diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 2afbb6f01afc..be82936c4089 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -363,12 +363,16 @@ struct iio_info { * @predisable: [DRIVER] function to run prior to marking buffer * disabled * @postdisable: [DRIVER] function to run after marking buffer disabled + * @validate_scan_mask: [DRIVER] function callback to check whether a given + * scan mask is valid for the device. */ struct iio_buffer_setup_ops { int (*preenable)(struct iio_dev *); int (*postenable)(struct iio_dev *); int (*predisable)(struct iio_dev *); int (*postdisable)(struct iio_dev *); + bool (*validate_scan_mask)(struct iio_dev *indio_dev, + const unsigned long *scan_mask); }; /** -- cgit v1.2.3 From 81636632057cc1bece2531220dd5803036f95ea9 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 9 Jul 2012 10:00:00 +0100 Subject: iio: Introduce iio_validate_scan_mask_onehot Add a helper function for validating a scan mask for devices where exactly one channel must be selected during sampling. This is a common case among devices which have scan mask restrictions so it makes sense to provide this function in the core. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/iio/industrialio-buffer.c | 16 ++++++++++++++++ include/linux/iio/buffer.h | 3 +++ 2 files changed, 19 insertions(+) (limited to 'include/linux') diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index cc5db36fb75a..8c1dc9a683fb 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -570,6 +570,22 @@ int iio_sw_buffer_preenable(struct iio_dev *indio_dev) } EXPORT_SYMBOL(iio_sw_buffer_preenable); +/** + * iio_validate_scan_mask_onehot() - Validates that exactly one channel is selected + * @indio_dev: the iio device + * @mask: scan mask to be checked + * + * Return true if exactly one bit is set in the scan mask, false otherwise. It + * can be used for devices where only one channel can be active for sampling at + * a time. + */ +bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, + const unsigned long *mask) +{ + return bitmap_weight(mask, indio_dev->masklength) == 1; +} +EXPORT_SYMBOL_GPL(iio_validate_scan_mask_onehot); + static bool iio_validate_scan_mask(struct iio_dev *indio_dev, const unsigned long *mask) { diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 2a2b6b4d8d05..8ba516fc2ec6 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -177,6 +177,9 @@ ssize_t iio_buffer_show_enable(struct device *dev, int iio_sw_buffer_preenable(struct iio_dev *indio_dev); +bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, + const unsigned long *mask); + #else /* CONFIG_IIO_BUFFER */ static inline int iio_buffer_register(struct iio_dev *indio_dev, -- cgit v1.2.3 From 21cd1fab058671313f7c178b640999fcd0d8de21 Mon Sep 17 00:00:00 2001 From: Jon Brenner Date: Wed, 16 May 2012 10:46:42 -0500 Subject: IIO channel type and modifiers for CCT and RGBC data Add iio channel type and modifiers for Correlated Color Temperature (CCT) and RGBC (red/green/blue/clear) data. Add CCT and RGBC descriptions to documentation. Changes: Revised/condensed RGBC descriptions. Merge and trivial fix done by Jonathan Cameron. Signed-off-by: Jon Brenner Signed-off-by: Jonathan Cameron --- drivers/iio/industrialio-core.c | 5 +++++ .../staging/iio/Documentation/sysfs-bus-iio-light | 23 ++++++++++++++++++++++ include/linux/iio/types.h | 5 +++++ 3 files changed, 33 insertions(+) (limited to 'include/linux') diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index bb3c692e49b8..2ec266ef41a3 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -64,6 +64,7 @@ static const char * const iio_chan_type_name_spec[] = { [IIO_TIMESTAMP] = "timestamp", [IIO_CAPACITANCE] = "capacitance", [IIO_ALTVOLTAGE] = "altvoltage", + [IIO_CCT] = "cct", }; static const char * const iio_modifier_names[] = { @@ -74,6 +75,10 @@ static const char * const iio_modifier_names[] = { [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2", [IIO_MOD_LIGHT_BOTH] = "both", [IIO_MOD_LIGHT_IR] = "ir", + [IIO_MOD_LIGHT_CLEAR] = "clear", + [IIO_MOD_LIGHT_RED] = "red", + [IIO_MOD_LIGHT_GREEN] = "green", + [IIO_MOD_LIGHT_BLUE] = "blue", }; /* relies on pairs of these shared then separate */ diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light index d52be0385dc4..a28919da13e3 100644 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light @@ -82,3 +82,26 @@ Contact: linux-iio@vger.kernel.org Description: This property gets/sets the table of coefficients used in calculating illuminance in lux. + +What: /sys/bus/iio/devices/device[n]/in_intensity_clear[_input|_raw] +What: /sys/bus/iio/devices/device[n]/in_intensity_red[_input|_raw] +What: /sys/bus/iio/devices/device[n]/in_intensity_green[_input|_raw] +What: /sys/bus/iio/devices/device[n]/in_intensity_blue[_input|_raw] +KernelVersion: 3.4.0 +Contact: linux-iio@vger.kernel.org +Description: + This property is supported by sensors that have a RGBC + sensing mode. This value should be the output from a reading + and if expressed in SI units, should include _input. If this + value is not in SI units (irradiance, uW/mm^2), then it should + include _raw. + +What: /sys/bus/iio/devices/device[n]/in_cct0[_input|_raw] +KernelVersion: 3.4.0 +Contact: linux-iio@vger.kernel.org +Description: + This should return the correlated color temperature from the + light sensor. If it comes back in SI units, it should also + include _input else it should include _raw to signify it is not + in SI units. + diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h index e25040173346..44e397705d7f 100644 --- a/include/linux/iio/types.h +++ b/include/linux/iio/types.h @@ -27,6 +27,7 @@ enum iio_chan_type { IIO_TIMESTAMP, IIO_CAPACITANCE, IIO_ALTVOLTAGE, + IIO_CCT, }; enum iio_modifier { @@ -46,6 +47,10 @@ enum iio_modifier { IIO_MOD_LIGHT_IR, IIO_MOD_ROOT_SUM_SQUARED_X_Y, IIO_MOD_SUM_SQUARED_X_Y_Z, + IIO_MOD_LIGHT_CLEAR, + IIO_MOD_LIGHT_RED, + IIO_MOD_LIGHT_GREEN, + IIO_MOD_LIGHT_BLUE, }; #define IIO_VAL_INT 1 -- cgit v1.2.3 From 4a53ffae6afc94bab803087245b3b45e712c21c8 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 9 Jul 2012 17:03:18 -0700 Subject: pstore/ram_core: Get rid of prz->ecc_symsize and prz->ecc_poly The struct members were never used anywhere outside of persistent_ram_init_ecc(), so there's actually no need for them to be in the struct. If we ever want to make polynomial or symbol size configurable, it would make more sense to just pass initialized rs_decoder to the persistent_ram init functions. Signed-off-by: Anton Vorontsov Acked-by: Kees Cook Signed-off-by: Greg Kroah-Hartman --- fs/pstore/ram_core.c | 7 +++---- include/linux/pstore_ram.h | 2 -- 2 files changed, 3 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index a5a7b13d358c..3f4d6e64f6d7 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -177,14 +177,14 @@ static int persistent_ram_init_ecc(struct persistent_ram_zone *prz) struct persistent_ram_buffer *buffer = prz->buffer; int ecc_blocks; size_t ecc_total; + int ecc_symsize = 8; + int ecc_poly = 0x11d; if (!prz->ecc) return 0; prz->ecc_block_size = 128; prz->ecc_size = 16; - prz->ecc_symsize = 8; - prz->ecc_poly = 0x11d; ecc_blocks = DIV_ROUND_UP(prz->buffer_size, prz->ecc_block_size); ecc_total = (ecc_blocks + 1) * prz->ecc_size; @@ -202,8 +202,7 @@ static int persistent_ram_init_ecc(struct persistent_ram_zone *prz) * first consecutive root is 0 * primitive element to generate roots = 1 */ - prz->rs_decoder = init_rs(prz->ecc_symsize, prz->ecc_poly, 0, 1, - prz->ecc_size); + prz->rs_decoder = init_rs(ecc_symsize, ecc_poly, 0, 1, prz->ecc_size); if (prz->rs_decoder == NULL) { pr_info("persistent_ram: init_rs failed\n"); return -EINVAL; diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index e681af92c04b..a0975c02194a 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -41,8 +41,6 @@ struct persistent_ram_zone { int bad_blocks; int ecc_block_size; int ecc_size; - int ecc_symsize; - int ecc_poly; char *old_log; size_t old_log_size; -- cgit v1.2.3 From 5ca5d4e61d0cac15f36160ab48425c6e43bf2e2f Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 9 Jul 2012 17:03:19 -0700 Subject: pstore/ram: Make ECC size configurable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This is now pretty straightforward: instead of using bool, just pass an integer. For backwards compatibility ramoops.ecc=1 means 16 bytes ECC (using 1 byte for ECC isn't much of use anyway). Suggested-by: Arve Hjønnevåg Signed-off-by: Anton Vorontsov Acked-by: Kees Cook Signed-off-by: Greg Kroah-Hartman --- fs/pstore/ram.c | 22 ++++++++++++++-------- fs/pstore/ram_core.c | 15 ++++++++------- include/linux/pstore_ram.h | 4 ++-- 3 files changed, 24 insertions(+), 17 deletions(-) (limited to 'include/linux') diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 58b93fbd117e..b39aebbaeb89 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -63,7 +63,9 @@ MODULE_PARM_DESC(dump_oops, static int ramoops_ecc; module_param_named(ecc, ramoops_ecc, int, 0600); MODULE_PARM_DESC(ramoops_ecc, - "set to 1 to enable ECC support"); + "if non-zero, the option enables ECC support and specifies " + "ECC buffer size in bytes (1 is a special value, means 16 " + "bytes ECC)"); struct ramoops_context { struct persistent_ram_zone **przs; @@ -73,7 +75,7 @@ struct ramoops_context { size_t record_size; size_t console_size; int dump_oops; - bool ecc; + int ecc_size; unsigned int max_dump_cnt; unsigned int dump_write_cnt; unsigned int dump_read_cnt; @@ -288,7 +290,7 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt, for (i = 0; i < cxt->max_dump_cnt; i++) { size_t sz = cxt->record_size; - cxt->przs[i] = persistent_ram_new(*paddr, sz, cxt->ecc); + cxt->przs[i] = persistent_ram_new(*paddr, sz, cxt->ecc_size); if (IS_ERR(cxt->przs[i])) { err = PTR_ERR(cxt->przs[i]); dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n", @@ -314,7 +316,7 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt, if (*paddr + sz > *paddr + cxt->size) return -ENOMEM; - *prz = persistent_ram_new(*paddr, sz, cxt->ecc); + *prz = persistent_ram_new(*paddr, sz, cxt->ecc_size); if (IS_ERR(*prz)) { int err = PTR_ERR(*prz); @@ -361,7 +363,7 @@ static int __devinit ramoops_probe(struct platform_device *pdev) cxt->record_size = pdata->record_size; cxt->console_size = pdata->console_size; cxt->dump_oops = pdata->dump_oops; - cxt->ecc = pdata->ecc; + cxt->ecc_size = pdata->ecc_size; paddr = cxt->phys_addr; @@ -411,9 +413,9 @@ static int __devinit ramoops_probe(struct platform_device *pdev) record_size = pdata->record_size; dump_oops = pdata->dump_oops; - pr_info("attached 0x%lx@0x%llx, ecc: %s\n", + pr_info("attached 0x%lx@0x%llx, ecc: %d\n", cxt->size, (unsigned long long)cxt->phys_addr, - ramoops_ecc ? "on" : "off"); + cxt->ecc_size); return 0; @@ -478,7 +480,11 @@ static void ramoops_register_dummy(void) dummy_data->record_size = record_size; dummy_data->console_size = ramoops_console_size; dummy_data->dump_oops = dump_oops; - dummy_data->ecc = ramoops_ecc; + /* + * For backwards compatibility ramoops.ecc=1 means 16 bytes ECC + * (using 1 byte for ECC isn't much of use anyway). + */ + dummy_data->ecc_size = ramoops_ecc == 1 ? 16 : ramoops_ecc; dummy = platform_device_register_data(NULL, "ramoops", -1, dummy_data, sizeof(struct ramoops_platform_data)); diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index 3f4d6e64f6d7..7e5a2a9154ca 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -171,7 +171,8 @@ static void persistent_ram_ecc_old(struct persistent_ram_zone *prz) } } -static int persistent_ram_init_ecc(struct persistent_ram_zone *prz) +static int persistent_ram_init_ecc(struct persistent_ram_zone *prz, + int ecc_size) { int numerr; struct persistent_ram_buffer *buffer = prz->buffer; @@ -184,7 +185,7 @@ static int persistent_ram_init_ecc(struct persistent_ram_zone *prz) return 0; prz->ecc_block_size = 128; - prz->ecc_size = 16; + prz->ecc_size = ecc_size; ecc_blocks = DIV_ROUND_UP(prz->buffer_size, prz->ecc_block_size); ecc_total = (ecc_blocks + 1) * prz->ecc_size; @@ -390,13 +391,13 @@ static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size, } static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, - bool ecc) + int ecc_size) { int ret; - prz->ecc = ecc; + prz->ecc = ecc_size; - ret = persistent_ram_init_ecc(prz); + ret = persistent_ram_init_ecc(prz, ecc_size); if (ret) return ret; @@ -444,7 +445,7 @@ void persistent_ram_free(struct persistent_ram_zone *prz) struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, size_t size, - bool ecc) + int ecc_size) { struct persistent_ram_zone *prz; int ret = -ENOMEM; @@ -459,7 +460,7 @@ struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, if (ret) goto err; - ret = persistent_ram_post_init(prz, ecc); + ret = persistent_ram_post_init(prz, ecc_size); if (ret) goto err; diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index a0975c02194a..94b79f173365 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -48,7 +48,7 @@ struct persistent_ram_zone { struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, size_t size, - bool ecc); + int ecc_size); void persistent_ram_free(struct persistent_ram_zone *prz); void persistent_ram_zap(struct persistent_ram_zone *prz); @@ -74,7 +74,7 @@ struct ramoops_platform_data { unsigned long record_size; unsigned long console_size; int dump_oops; - bool ecc; + int ecc_size; }; #endif -- cgit v1.2.3 From c1743cbc8d20d208bb1d2b10598204f2d89b144c Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 9 Jul 2012 17:03:20 -0700 Subject: pstore/ram_core: Get rid of prz->ecc enable/disable flag Nowadays we can use prz->ecc_size as a flag, no need for the special member in the prz struct. Signed-off-by: Anton Vorontsov Acked-by: Kees Cook Signed-off-by: Greg Kroah-Hartman --- fs/pstore/ram_core.c | 10 ++++------ include/linux/pstore_ram.h | 1 - 2 files changed, 4 insertions(+), 7 deletions(-) (limited to 'include/linux') diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index 7e5a2a9154ca..4dabbb8e4270 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -114,7 +114,7 @@ static void notrace persistent_ram_update_ecc(struct persistent_ram_zone *prz, int ecc_size = prz->ecc_size; int size = prz->ecc_block_size; - if (!prz->ecc) + if (!prz->ecc_size) return; block = buffer->data + (start & ~(ecc_block_size - 1)); @@ -133,7 +133,7 @@ static void persistent_ram_update_header_ecc(struct persistent_ram_zone *prz) { struct persistent_ram_buffer *buffer = prz->buffer; - if (!prz->ecc) + if (!prz->ecc_size) return; persistent_ram_encode_rs8(prz, (uint8_t *)buffer, sizeof(*buffer), @@ -146,7 +146,7 @@ static void persistent_ram_ecc_old(struct persistent_ram_zone *prz) uint8_t *block; uint8_t *par; - if (!prz->ecc) + if (!prz->ecc_size) return; block = buffer->data; @@ -181,7 +181,7 @@ static int persistent_ram_init_ecc(struct persistent_ram_zone *prz, int ecc_symsize = 8; int ecc_poly = 0x11d; - if (!prz->ecc) + if (!ecc_size) return 0; prz->ecc_block_size = 128; @@ -395,8 +395,6 @@ static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, { int ret; - prz->ecc = ecc_size; - ret = persistent_ram_init_ecc(prz, ecc_size); if (ret) return ret; diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index 94b79f173365..dcf805f56bc6 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -33,7 +33,6 @@ struct persistent_ram_zone { size_t buffer_size; /* ECC correction */ - bool ecc; char *par_buffer; char *par_header; struct rs_control *rs_decoder; -- cgit v1.2.3 From 897dba027445be93f40e5caf550556ca38c48c51 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 9 Jul 2012 17:10:40 -0700 Subject: pstore: Introduce write_buf backend callback For function tracing we need to stop using pstore.buf directly, since in a tracing callback we can't use spinlocks, and thus we can't safely use the global buffer. With write_buf callback, backends no longer need to access pstore.buf directly, and thus we can pass any buffers (e.g. allocated on stack). Signed-off-by: Anton Vorontsov Signed-off-by: Greg Kroah-Hartman --- fs/pstore/platform.c | 10 ++++++++++ include/linux/pstore.h | 4 ++++ 2 files changed, 14 insertions(+) (limited to 'include/linux') diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 6b3ff045fe6e..ef5ca8a0255c 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -188,6 +188,14 @@ static void pstore_register_console(void) static void pstore_register_console(void) {} #endif +static int pstore_write_compat(enum pstore_type_id type, + enum kmsg_dump_reason reason, + u64 *id, unsigned int part, + size_t size, struct pstore_info *psi) +{ + return psi->write_buf(type, reason, id, part, psinfo->buf, size, psi); +} + /* * platform specific persistent storage driver registers with * us here. If pstore is already mounted, call the platform @@ -212,6 +220,8 @@ int pstore_register(struct pstore_info *psi) return -EINVAL; } + if (!psi->write) + psi->write = pstore_write_compat; psinfo = psi; mutex_init(&psinfo->read_mutex); spin_unlock(&pstore_lock); diff --git a/include/linux/pstore.h b/include/linux/pstore.h index 1bd014b8e432..b107484192fc 100644 --- a/include/linux/pstore.h +++ b/include/linux/pstore.h @@ -48,6 +48,10 @@ struct pstore_info { int (*write)(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, unsigned int part, size_t size, struct pstore_info *psi); + int (*write_buf)(enum pstore_type_id type, + enum kmsg_dump_reason reason, u64 *id, + unsigned int part, const char *buf, size_t size, + struct pstore_info *psi); int (*erase)(enum pstore_type_id type, u64 id, struct pstore_info *psi); void *data; -- cgit v1.2.3 From 060287b8c467bf49a594d8d669e1986c6d8d76b0 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 9 Jul 2012 17:10:41 -0700 Subject: pstore: Add persistent function tracing With this support kernel can save function call chain log into a persistent ram buffer that can be decoded and dumped after reboot through pstore filesystem. It can be used to determine what function was last called before a reset or panic. We store the log in a binary format and then decode it at read time. p.s. Mostly the code comes from trace_persistent.c driver found in the Android git tree, written by Colin Cross (according to sign-off history). I reworked the driver a little bit, and ported it to pstore. Signed-off-by: Anton Vorontsov Signed-off-by: Greg Kroah-Hartman --- fs/pstore/Kconfig | 12 ++++++ fs/pstore/Makefile | 1 + fs/pstore/ftrace.c | 35 ++++++++++++++++ fs/pstore/inode.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++-- fs/pstore/internal.h | 43 +++++++++++++++++++ fs/pstore/platform.c | 2 +- include/linux/pstore.h | 9 ++++ 7 files changed, 208 insertions(+), 5 deletions(-) create mode 100644 fs/pstore/ftrace.c (limited to 'include/linux') diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig index d044de6ee308..d39bb5cce883 100644 --- a/fs/pstore/Kconfig +++ b/fs/pstore/Kconfig @@ -19,6 +19,18 @@ config PSTORE_CONSOLE When the option is enabled, pstore will log all kernel messages, even if no oops or panic happened. +config PSTORE_FTRACE + bool "Persistent function tracer" + depends on PSTORE + depends on FUNCTION_TRACER + help + With this option kernel traces function calls into a persistent + ram buffer that can be decoded and dumped after reboot through + pstore filesystem. It can be used to determine what function + was last called before a reset or panic. + + If unsure, say N. + config PSTORE_RAM tristate "Log panic/oops to a RAM buffer" depends on PSTORE diff --git a/fs/pstore/Makefile b/fs/pstore/Makefile index 278a44e0d4e1..4c9095c2781e 100644 --- a/fs/pstore/Makefile +++ b/fs/pstore/Makefile @@ -5,6 +5,7 @@ obj-y += pstore.o pstore-objs += inode.o platform.o +obj-$(CONFIG_PSTORE_FTRACE) += ftrace.o ramoops-objs += ram.o ram_core.o obj-$(CONFIG_PSTORE_RAM) += ramoops.o diff --git a/fs/pstore/ftrace.c b/fs/pstore/ftrace.c new file mode 100644 index 000000000000..a130d484b7d3 --- /dev/null +++ b/fs/pstore/ftrace.c @@ -0,0 +1,35 @@ +/* + * Copyright 2012 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include "internal.h" + +void notrace pstore_ftrace_call(unsigned long ip, unsigned long parent_ip) +{ + struct pstore_ftrace_record rec = {}; + + if (unlikely(oops_in_progress)) + return; + + rec.ip = ip; + rec.parent_ip = parent_ip; + pstore_ftrace_encode_cpu(&rec, raw_smp_processor_id()); + psinfo->write_buf(PSTORE_TYPE_FTRACE, 0, NULL, 0, (void *)&rec, + sizeof(rec), psinfo); +} diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index 45bff5441b04..4ab572e6d277 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -52,18 +53,117 @@ struct pstore_private { char data[]; }; +struct pstore_ftrace_seq_data { + const void *ptr; + size_t off; + size_t size; +}; + +#define REC_SIZE sizeof(struct pstore_ftrace_record) + +static void *pstore_ftrace_seq_start(struct seq_file *s, loff_t *pos) +{ + struct pstore_private *ps = s->private; + struct pstore_ftrace_seq_data *data; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return NULL; + + data->off = ps->size % REC_SIZE; + data->off += *pos * REC_SIZE; + if (data->off + REC_SIZE > ps->size) { + kfree(data); + return NULL; + } + + return data; + +} + +static void pstore_ftrace_seq_stop(struct seq_file *s, void *v) +{ + kfree(v); +} + +static void *pstore_ftrace_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + struct pstore_private *ps = s->private; + struct pstore_ftrace_seq_data *data = v; + + data->off += REC_SIZE; + if (data->off + REC_SIZE > ps->size) + return NULL; + + (*pos)++; + return data; +} + +static int pstore_ftrace_seq_show(struct seq_file *s, void *v) +{ + struct pstore_private *ps = s->private; + struct pstore_ftrace_seq_data *data = v; + struct pstore_ftrace_record *rec = (void *)(ps->data + data->off); + + seq_printf(s, "%d %08lx %08lx %pf <- %pF\n", + pstore_ftrace_decode_cpu(rec), rec->ip, rec->parent_ip, + (void *)rec->ip, (void *)rec->parent_ip); + + return 0; +} + +static const struct seq_operations pstore_ftrace_seq_ops = { + .start = pstore_ftrace_seq_start, + .next = pstore_ftrace_seq_next, + .stop = pstore_ftrace_seq_stop, + .show = pstore_ftrace_seq_show, +}; + static ssize_t pstore_file_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { - struct pstore_private *ps = file->private_data; + struct seq_file *sf = file->private_data; + struct pstore_private *ps = sf->private; + if (ps->type == PSTORE_TYPE_FTRACE) + return seq_read(file, userbuf, count, ppos); return simple_read_from_buffer(userbuf, count, ppos, ps->data, ps->size); } +static int pstore_file_open(struct inode *inode, struct file *file) +{ + struct pstore_private *ps = inode->i_private; + struct seq_file *sf; + int err; + const struct seq_operations *sops = NULL; + + if (ps->type == PSTORE_TYPE_FTRACE) + sops = &pstore_ftrace_seq_ops; + + err = seq_open(file, sops); + if (err < 0) + return err; + + sf = file->private_data; + sf->private = ps; + + return 0; +} + +static loff_t pstore_file_llseek(struct file *file, loff_t off, int origin) +{ + struct seq_file *sf = file->private_data; + + if (sf->op) + return seq_lseek(file, off, origin); + return default_llseek(file, off, origin); +} + static const struct file_operations pstore_file_operations = { - .open = simple_open, - .read = pstore_file_read, - .llseek = default_llseek, + .open = pstore_file_open, + .read = pstore_file_read, + .llseek = pstore_file_llseek, + .release = seq_release, }; /* @@ -215,6 +315,9 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, case PSTORE_TYPE_CONSOLE: sprintf(name, "console-%s", psname); break; + case PSTORE_TYPE_FTRACE: + sprintf(name, "ftrace-%s", psname); + break; case PSTORE_TYPE_MCE: sprintf(name, "mce-%s-%lld", psname, id); break; diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h index 3bde461c3f34..958c48d8905c 100644 --- a/fs/pstore/internal.h +++ b/fs/pstore/internal.h @@ -1,6 +1,49 @@ +#ifndef __PSTORE_INTERNAL_H__ +#define __PSTORE_INTERNAL_H__ + +#include + +#if NR_CPUS <= 2 && defined(CONFIG_ARM_THUMB) +#define PSTORE_CPU_IN_IP 0x1 +#elif NR_CPUS <= 4 && defined(CONFIG_ARM) +#define PSTORE_CPU_IN_IP 0x3 +#endif + +struct pstore_ftrace_record { + unsigned long ip; + unsigned long parent_ip; +#ifndef PSTORE_CPU_IN_IP + unsigned int cpu; +#endif +}; + +static inline void +pstore_ftrace_encode_cpu(struct pstore_ftrace_record *rec, unsigned int cpu) +{ +#ifndef PSTORE_CPU_IN_IP + rec->cpu = cpu; +#else + rec->ip |= cpu; +#endif +} + +static inline unsigned int +pstore_ftrace_decode_cpu(struct pstore_ftrace_record *rec) +{ +#ifndef PSTORE_CPU_IN_IP + return rec->cpu; +#else + return rec->ip & PSTORE_CPU_IN_IP; +#endif +} + +extern struct pstore_info *psinfo; + extern void pstore_set_kmsg_bytes(int); extern void pstore_get_records(int); extern int pstore_mkfile(enum pstore_type_id, char *psname, u64 id, char *data, size_t size, struct timespec time, struct pstore_info *psi); extern int pstore_is_mounted(void); + +#endif diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index ef5ca8a0255c..29996e8793a7 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -61,7 +61,7 @@ static DECLARE_WORK(pstore_work, pstore_dowork); * calls to pstore_register() */ static DEFINE_SPINLOCK(pstore_lock); -static struct pstore_info *psinfo; +struct pstore_info *psinfo; static char *backend; diff --git a/include/linux/pstore.h b/include/linux/pstore.h index b107484192fc..120443b0fda5 100644 --- a/include/linux/pstore.h +++ b/include/linux/pstore.h @@ -30,6 +30,7 @@ enum pstore_type_id { PSTORE_TYPE_DMESG = 0, PSTORE_TYPE_MCE = 1, PSTORE_TYPE_CONSOLE = 2, + PSTORE_TYPE_FTRACE = 3, PSTORE_TYPE_UNKNOWN = 255 }; @@ -57,6 +58,14 @@ struct pstore_info { void *data; }; + +#ifdef CONFIG_PSTORE_FTRACE +extern void pstore_ftrace_call(unsigned long ip, unsigned long parent_ip); +#else +static inline void pstore_ftrace_call(unsigned long ip, unsigned long parent_ip) +{ } +#endif + #ifdef CONFIG_PSTORE extern int pstore_register(struct pstore_info *); #else -- cgit v1.2.3 From a694d1b5916a486ce25fb5f2b39f2627f7afd5f3 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 9 Jul 2012 17:10:44 -0700 Subject: pstore/ram: Add ftrace messages handling The ftrace log size is configurable via ramoops.ftrace_size module option, and the log itself is available via /ftrace-ramoops file. Signed-off-by: Anton Vorontsov Signed-off-by: Greg Kroah-Hartman --- Documentation/ramoops.txt | 25 +++++++++++++++++++++++++ fs/pstore/ram.c | 37 +++++++++++++++++++++++++++++++++---- include/linux/pstore_ram.h | 1 + 3 files changed, 59 insertions(+), 4 deletions(-) (limited to 'include/linux') diff --git a/Documentation/ramoops.txt b/Documentation/ramoops.txt index 59a74a8ee2e5..197ad59ab9bf 100644 --- a/Documentation/ramoops.txt +++ b/Documentation/ramoops.txt @@ -94,3 +94,28 @@ timestamp and a new line. The dump then continues with the actual data. The dump data can be read from the pstore filesystem. The format for these files is "dmesg-ramoops-N", where N is the record number in memory. To delete a stored record from RAM, simply unlink the respective pstore file. + +5. Persistent function tracing + +Persistent function tracing might be useful for debugging software or hardware +related hangs. The functions call chain log is stored in a "ftrace-ramoops" +file. Here is an example of usage: + + # mount -t debugfs debugfs /sys/kernel/debug/ + # cd /sys/kernel/debug/tracing + # echo function > current_tracer + # echo 1 > options/func_pstore + # reboot -f + [...] + # mount -t pstore pstore /mnt/ + # tail /mnt/ftrace-ramoops + 0 ffffffff8101ea64 ffffffff8101bcda native_apic_mem_read <- disconnect_bsp_APIC+0x6a/0xc0 + 0 ffffffff8101ea44 ffffffff8101bcf6 native_apic_mem_write <- disconnect_bsp_APIC+0x86/0xc0 + 0 ffffffff81020084 ffffffff8101a4b5 hpet_disable <- native_machine_shutdown+0x75/0x90 + 0 ffffffff81005f94 ffffffff8101a4bb iommu_shutdown_noop <- native_machine_shutdown+0x7b/0x90 + 0 ffffffff8101a6a1 ffffffff8101a437 native_machine_emergency_restart <- native_machine_restart+0x37/0x40 + 0 ffffffff811f9876 ffffffff8101a73a acpi_reboot <- native_machine_emergency_restart+0xaa/0x1e0 + 0 ffffffff8101a514 ffffffff8101a772 mach_reboot_fixups <- native_machine_emergency_restart+0xe2/0x1e0 + 0 ffffffff811d9c54 ffffffff8101a7a0 __const_udelay <- native_machine_emergency_restart+0x110/0x1e0 + 0 ffffffff811d9c34 ffffffff811d9c80 __delay <- __const_udelay+0x30/0x40 + 0 ffffffff811d9d14 ffffffff811d9c3f delay_tsc <- __delay+0xf/0x20 diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 74f4111bd0da..1dd108e0cc60 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -45,6 +45,10 @@ static ulong ramoops_console_size = MIN_MEM_SIZE; module_param_named(console_size, ramoops_console_size, ulong, 0400); MODULE_PARM_DESC(console_size, "size of kernel console log"); +static ulong ramoops_ftrace_size = MIN_MEM_SIZE; +module_param_named(ftrace_size, ramoops_ftrace_size, ulong, 0400); +MODULE_PARM_DESC(ftrace_size, "size of ftrace log"); + static ulong mem_address; module_param(mem_address, ulong, 0400); MODULE_PARM_DESC(mem_address, @@ -70,16 +74,19 @@ MODULE_PARM_DESC(ramoops_ecc, struct ramoops_context { struct persistent_ram_zone **przs; struct persistent_ram_zone *cprz; + struct persistent_ram_zone *fprz; phys_addr_t phys_addr; unsigned long size; size_t record_size; size_t console_size; + size_t ftrace_size; int dump_oops; int ecc_size; unsigned int max_dump_cnt; unsigned int dump_write_cnt; unsigned int dump_read_cnt; unsigned int console_read_cnt; + unsigned int ftrace_read_cnt; struct pstore_info pstore; }; @@ -137,6 +144,9 @@ static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, if (!prz) prz = ramoops_get_next_prz(&cxt->cprz, &cxt->console_read_cnt, 1, id, type, PSTORE_TYPE_CONSOLE, 0); + if (!prz) + prz = ramoops_get_next_prz(&cxt->fprz, &cxt->ftrace_read_cnt, + 1, id, type, PSTORE_TYPE_FTRACE, 0); if (!prz) return 0; @@ -186,6 +196,11 @@ static int ramoops_pstore_write_buf(enum pstore_type_id type, return -ENOMEM; persistent_ram_write(cxt->cprz, buf, size); return 0; + } else if (type == PSTORE_TYPE_FTRACE) { + if (!cxt->fprz) + return -ENOMEM; + persistent_ram_write(cxt->fprz, buf, size); + return 0; } if (type != PSTORE_TYPE_DMESG) @@ -235,6 +250,9 @@ static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, case PSTORE_TYPE_CONSOLE: prz = cxt->cprz; break; + case PSTORE_TYPE_FTRACE: + prz = cxt->fprz; + break; default: return -EINVAL; } @@ -348,7 +366,8 @@ static int __devinit ramoops_probe(struct platform_device *pdev) if (cxt->max_dump_cnt) goto fail_out; - if (!pdata->mem_size || (!pdata->record_size && !pdata->console_size)) { + if (!pdata->mem_size || (!pdata->record_size && !pdata->console_size && + !pdata->ftrace_size)) { pr_err("The memory size and the record/console size must be " "non-zero\n"); goto fail_out; @@ -357,18 +376,20 @@ static int __devinit ramoops_probe(struct platform_device *pdev) pdata->mem_size = rounddown_pow_of_two(pdata->mem_size); pdata->record_size = rounddown_pow_of_two(pdata->record_size); pdata->console_size = rounddown_pow_of_two(pdata->console_size); + pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size); cxt->dump_read_cnt = 0; cxt->size = pdata->mem_size; cxt->phys_addr = pdata->mem_address; cxt->record_size = pdata->record_size; cxt->console_size = pdata->console_size; + cxt->ftrace_size = pdata->ftrace_size; cxt->dump_oops = pdata->dump_oops; cxt->ecc_size = pdata->ecc_size; paddr = cxt->phys_addr; - dump_mem_sz = cxt->size - cxt->console_size; + dump_mem_sz = cxt->size - cxt->console_size - cxt->ftrace_size; err = ramoops_init_przs(dev, cxt, &paddr, dump_mem_sz); if (err) goto fail_out; @@ -377,9 +398,14 @@ static int __devinit ramoops_probe(struct platform_device *pdev) if (err) goto fail_init_cprz; - if (!cxt->przs && !cxt->cprz) { + err = ramoops_init_prz(dev, cxt, &cxt->fprz, &paddr, cxt->ftrace_size); + if (err) + goto fail_init_fprz; + + if (!cxt->przs && !cxt->cprz && !cxt->fprz) { pr_err("memory size too small, minimum is %lu\n", - cxt->console_size + cxt->record_size); + cxt->console_size + cxt->record_size + + cxt->ftrace_size); goto fail_cnt; } @@ -426,6 +452,8 @@ fail_clear: cxt->pstore.bufsize = 0; cxt->max_dump_cnt = 0; fail_cnt: + kfree(cxt->fprz); +fail_init_fprz: kfree(cxt->cprz); fail_init_cprz: ramoops_free_przs(cxt); @@ -480,6 +508,7 @@ static void ramoops_register_dummy(void) dummy_data->mem_address = mem_address; dummy_data->record_size = record_size; dummy_data->console_size = ramoops_console_size; + dummy_data->ftrace_size = ramoops_ftrace_size; dummy_data->dump_oops = dump_oops; /* * For backwards compatibility ramoops.ecc=1 means 16 bytes ECC diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index dcf805f56bc6..af848e1593b9 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -72,6 +72,7 @@ struct ramoops_platform_data { unsigned long mem_address; unsigned long record_size; unsigned long console_size; + unsigned long ftrace_size; int dump_oops; int ecc_size; }; -- cgit v1.2.3 From 67a101f573b0cb1043c8c305112113450cb9fdbf Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Tue, 17 Jul 2012 11:37:07 -0700 Subject: pstore: Headers should include all stuff they use MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Headers should really include all the needed prototypes, types, defines etc. to be self-contained. This is a long-standing issue, but apparently the new tracing code unearthed it (SMP=n is also a prerequisite): In file included from fs/pstore/internal.h:4:0, from fs/pstore/ftrace.c:21: include/linux/pstore.h:43:15: error: field ‘read_mutex’ has incomplete type While at it, I also added the following: linux/types.h -> size_t, phys_addr_t, uXX and friends linux/spinlock.h -> spinlock_t linux/errno.h -> Exxxx linux/time.h -> struct timespec (struct passed by value) struct module and rs_control forward declaration (passed via pointers). Signed-off-by: Anton Vorontsov Signed-off-by: Greg Kroah-Hartman --- fs/pstore/internal.h | 2 ++ include/linux/pstore.h | 6 ++++++ include/linux/pstore_ram.h | 1 + 3 files changed, 9 insertions(+) (limited to 'include/linux') diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h index 958c48d8905c..0d0d3b7d5f12 100644 --- a/fs/pstore/internal.h +++ b/fs/pstore/internal.h @@ -1,6 +1,8 @@ #ifndef __PSTORE_INTERNAL_H__ #define __PSTORE_INTERNAL_H__ +#include +#include #include #if NR_CPUS <= 2 && defined(CONFIG_ARM_THUMB) diff --git a/include/linux/pstore.h b/include/linux/pstore.h index 120443b0fda5..c892587d9b81 100644 --- a/include/linux/pstore.h +++ b/include/linux/pstore.h @@ -24,6 +24,10 @@ #include #include +#include +#include +#include +#include /* types */ enum pstore_type_id { @@ -34,6 +38,8 @@ enum pstore_type_id { PSTORE_TYPE_UNKNOWN = 255 }; +struct module; + struct pstore_info { struct module *owner; char *name; diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index af848e1593b9..ba2b211aaa81 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -24,6 +24,7 @@ #include struct persistent_ram_buffer; +struct rs_control; struct persistent_ram_zone { phys_addr_t paddr; -- cgit v1.2.3 From cbe7cbf5a666ad9dfe2e0c276066131af73769ab Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Tue, 17 Jul 2012 12:11:12 -0700 Subject: pstore/ram: Make tracing log versioned Decoding the binary trace w/ a different kernel might be troublesome since we convert addresses to symbols. For kernels with minimal changes, the mappings would probably match, but it's not guaranteed at all. (But still we could convert the addresses by hand, since we do print raw addresses.) If we use modules, the symbols could be loaded at different addresses from the previously booted kernel, and so this would also fail, but there's nothing we can do about it. Also, the binary data format that pstore/ram is using in its ringbuffer may change between the kernels, so here we too must ensure that we're running the same kernel. So, there are two questions really: 1. How to compute the unique kernel tag; 2. Where to store it. In this patch we're using LINUX_VERSION_CODE, just as hibernation (suspend-to-disk) does. This way we are protecting from the kernel version mismatch, making sure that we're running the same kernel version and patch level. We could use CRC of a symbol table (as suggested by Tony Luck), but for now let's not be that strict. And as for storing, we are using a small trick here. Instead of allocating a dedicated buffer for the tag (i.e. another prz), or hacking ram_core routines to "reserve" some control data in the buffer, we are just encoding the tag into the buffer signature (and XOR'ing it with the actual signature value, so that buffers not needing a tag can just pass zero, which will result into the plain old PRZ signature). Suggested-by: Steven Rostedt Suggested-by: Tony Luck Suggested-by: Colin Cross Signed-off-by: Anton Vorontsov Signed-off-by: Greg Kroah-Hartman --- fs/pstore/ram.c | 13 ++++++++----- fs/pstore/ram_core.c | 12 +++++++----- include/linux/pstore_ram.h | 2 +- 3 files changed, 16 insertions(+), 11 deletions(-) (limited to 'include/linux') diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 1dd108e0cc60..0b311bc18916 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -309,7 +310,7 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt, for (i = 0; i < cxt->max_dump_cnt; i++) { size_t sz = cxt->record_size; - cxt->przs[i] = persistent_ram_new(*paddr, sz, cxt->ecc_size); + cxt->przs[i] = persistent_ram_new(*paddr, sz, 0, cxt->ecc_size); if (IS_ERR(cxt->przs[i])) { err = PTR_ERR(cxt->przs[i]); dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n", @@ -327,7 +328,7 @@ fail_prz: static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt, struct persistent_ram_zone **prz, - phys_addr_t *paddr, size_t sz) + phys_addr_t *paddr, size_t sz, u32 sig) { if (!sz) return 0; @@ -335,7 +336,7 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt, if (*paddr + sz > *paddr + cxt->size) return -ENOMEM; - *prz = persistent_ram_new(*paddr, sz, cxt->ecc_size); + *prz = persistent_ram_new(*paddr, sz, sig, cxt->ecc_size); if (IS_ERR(*prz)) { int err = PTR_ERR(*prz); @@ -394,11 +395,13 @@ static int __devinit ramoops_probe(struct platform_device *pdev) if (err) goto fail_out; - err = ramoops_init_prz(dev, cxt, &cxt->cprz, &paddr, cxt->console_size); + err = ramoops_init_prz(dev, cxt, &cxt->cprz, &paddr, + cxt->console_size, 0); if (err) goto fail_init_cprz; - err = ramoops_init_prz(dev, cxt, &cxt->fprz, &paddr, cxt->ftrace_size); + err = ramoops_init_prz(dev, cxt, &cxt->fprz, &paddr, cxt->ftrace_size, + LINUX_VERSION_CODE); if (err) goto fail_init_fprz; diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index 4dabbb8e4270..eecd2a8a84dd 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -391,7 +391,7 @@ static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size, } static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, - int ecc_size) + u32 sig, int ecc_size) { int ret; @@ -399,7 +399,9 @@ static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, if (ret) return ret; - if (prz->buffer->sig == PERSISTENT_RAM_SIG) { + sig ^= PERSISTENT_RAM_SIG; + + if (prz->buffer->sig == sig) { if (buffer_size(prz) > prz->buffer_size || buffer_start(prz) > buffer_size(prz)) pr_info("persistent_ram: found existing invalid buffer," @@ -417,7 +419,7 @@ static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, " (sig = 0x%08x)\n", prz->buffer->sig); } - prz->buffer->sig = PERSISTENT_RAM_SIG; + prz->buffer->sig = sig; persistent_ram_zap(prz); return 0; @@ -442,7 +444,7 @@ void persistent_ram_free(struct persistent_ram_zone *prz) } struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, - size_t size, + size_t size, u32 sig, int ecc_size) { struct persistent_ram_zone *prz; @@ -458,7 +460,7 @@ struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, if (ret) goto err; - ret = persistent_ram_post_init(prz, ecc_size); + ret = persistent_ram_post_init(prz, sig, ecc_size); if (ret) goto err; diff --git a/include/linux/pstore_ram.h b/include/linux/pstore_ram.h index ba2b211aaa81..098d2a838296 100644 --- a/include/linux/pstore_ram.h +++ b/include/linux/pstore_ram.h @@ -47,7 +47,7 @@ struct persistent_ram_zone { }; struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, - size_t size, + size_t size, u32 sig, int ecc_size); void persistent_ram_free(struct persistent_ram_zone *prz); void persistent_ram_zap(struct persistent_ram_zone *prz); -- cgit v1.2.3