diff options
Diffstat (limited to 'drivers/media/dvb/frontends/or51132.c')
| -rw-r--r-- | drivers/media/dvb/frontends/or51132.c | 631 |
1 files changed, 0 insertions, 631 deletions
diff --git a/drivers/media/dvb/frontends/or51132.c b/drivers/media/dvb/frontends/or51132.c deleted file mode 100644 index 5ef921823c15..000000000000 --- a/drivers/media/dvb/frontends/or51132.c +++ /dev/null @@ -1,631 +0,0 @@ -/* - * Support for OR51132 (pcHDTV HD-3000) - VSB/QAM - * - * - * Copyright (C) 2007 Trent Piepho <xyzzy@speakeasy.org> - * - * Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com> - * - * Based on code from Jack Kelliher (kelliher@xmission.com) - * Copyright (C) 2002 & pcHDTV, inc. - * - * 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. - * -*/ - -/* - * This driver needs two external firmware files. Please copy - * "dvb-fe-or51132-vsb.fw" and "dvb-fe-or51132-qam.fw" to - * /usr/lib/hotplug/firmware/ or /lib/firmware/ - * (depending on configuration of firmware hotplug). - */ -#define OR51132_VSB_FIRMWARE "dvb-fe-or51132-vsb.fw" -#define OR51132_QAM_FIRMWARE "dvb-fe-or51132-qam.fw" - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <asm/byteorder.h> - -#include "dvb_math.h" -#include "dvb_frontend.h" -#include "or51132.h" - -static int debug; -#define dprintk(args...) \ - do { \ - if (debug) printk(KERN_DEBUG "or51132: " args); \ - } while (0) - - -struct or51132_state -{ - struct i2c_adapter* i2c; - - /* Configuration settings */ - const struct or51132_config* config; - - struct dvb_frontend frontend; - - /* Demodulator private data */ - fe_modulation_t current_modulation; - u32 snr; /* Result of last SNR calculation */ - - /* Tuner private data */ - u32 current_frequency; -}; - - -/* Write buffer to demod */ -static int or51132_writebuf(struct or51132_state *state, const u8 *buf, int len) -{ - int err; - struct i2c_msg msg = { .addr = state->config->demod_address, - .flags = 0, .buf = (u8*)buf, .len = len }; - - /* msleep(20); */ /* doesn't appear to be necessary */ - if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) { - printk(KERN_WARNING "or51132: I2C write (addr 0x%02x len %d) error: %d\n", - msg.addr, msg.len, err); - return -EREMOTEIO; - } - return 0; -} - -/* Write constant bytes, e.g. or51132_writebytes(state, 0x04, 0x42, 0x00); - Less code and more efficient that loading a buffer on the stack with - the bytes to send and then calling or51132_writebuf() on that. */ -#define or51132_writebytes(state, data...) \ - ({ static const u8 _data[] = {data}; \ - or51132_writebuf(state, _data, sizeof(_data)); }) - -/* Read data from demod into buffer. Returns 0 on success. */ -static int or51132_readbuf(struct or51132_state *state, u8 *buf, int len) -{ - int err; - struct i2c_msg msg = { .addr = state->config->demod_address, - .flags = I2C_M_RD, .buf = buf, .len = len }; - - /* msleep(20); */ /* doesn't appear to be necessary */ - if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) { - printk(KERN_WARNING "or51132: I2C read (addr 0x%02x len %d) error: %d\n", - msg.addr, msg.len, err); - return -EREMOTEIO; - } - return 0; -} - -/* Reads a 16-bit demod register. Returns <0 on error. */ -static int or51132_readreg(struct or51132_state *state, u8 reg) -{ - u8 buf[2] = { 0x04, reg }; - struct i2c_msg msg[2] = { - {.addr = state->config->demod_address, .flags = 0, - .buf = buf, .len = 2 }, - {.addr = state->config->demod_address, .flags = I2C_M_RD, - .buf = buf, .len = 2 }}; - int err; - - if ((err = i2c_transfer(state->i2c, msg, 2)) != 2) { - printk(KERN_WARNING "or51132: I2C error reading register %d: %d\n", - reg, err); - return -EREMOTEIO; - } - return buf[0] | (buf[1] << 8); -} - -static int or51132_load_firmware (struct dvb_frontend* fe, const struct firmware *fw) -{ - struct or51132_state* state = fe->demodulator_priv; - static const u8 run_buf[] = {0x7F,0x01}; - u8 rec_buf[8]; - u32 firmwareAsize, firmwareBsize; - int i,ret; - - dprintk("Firmware is %Zd bytes\n",fw->size); - - /* Get size of firmware A and B */ - firmwareAsize = le32_to_cpu(*((__le32*)fw->data)); - dprintk("FirmwareA is %i bytes\n",firmwareAsize); - firmwareBsize = le32_to_cpu(*((__le32*)(fw->data+4))); - dprintk("FirmwareB is %i bytes\n",firmwareBsize); - - /* Upload firmware */ - if ((ret = or51132_writebuf(state, &fw->data[8], firmwareAsize))) { - printk(KERN_WARNING "or51132: load_firmware error 1\n"); - return ret; - } - if ((ret = or51132_writebuf(state, &fw->data[8+firmwareAsize], - firmwareBsize))) { - printk(KERN_WARNING "or51132: load_firmware error 2\n"); - return ret; - } - - if ((ret = or51132_writebuf(state, run_buf, 2))) { - printk(KERN_WARNING "or51132: load_firmware error 3\n"); - return ret; - } - if ((ret = or51132_writebuf(state, run_buf, 2))) { - printk(KERN_WARNING "or51132: load_firmware error 4\n"); - return ret; - } - - /* 50ms for operation to begin */ - msleep(50); - - /* Read back ucode version to besure we loaded correctly and are really up and running */ - /* Get uCode version */ - if ((ret = or51132_writebytes(state, 0x10, 0x10, 0x00))) { - printk(KERN_WARNING "or51132: load_firmware error a\n"); - return ret; - } - if ((ret = or51132_writebytes(state, 0x04, 0x17))) { - printk(KERN_WARNING "or51132: load_firmware error b\n"); - return ret; - } - if ((ret = or51132_writebytes(state, 0x00, 0x00))) { - printk(KERN_WARNING "or51132: load_firmware error c\n"); - return ret; - } - for (i=0;i<4;i++) { - /* Once upon a time, this command might have had something - to do with getting the firmware version, but it's - not used anymore: - {0x04,0x00,0x30,0x00,i+1} */ - /* Read 8 bytes, two bytes at a time */ - if ((ret = or51132_readbuf(state, &rec_buf[i*2], 2))) { - printk(KERN_WARNING - "or51132: load_firmware error d - %d\n",i); - return ret; - } - } - - printk(KERN_WARNING - "or51132: Version: %02X%02X%02X%02X-%02X%02X%02X%02X (%02X%01X-%01X-%02X%01X-%01X)\n", - rec_buf[1],rec_buf[0],rec_buf[3],rec_buf[2], - rec_buf[5],rec_buf[4],rec_buf[7],rec_buf[6], - rec_buf[3],rec_buf[2]>>4,rec_buf[2]&0x0f, - rec_buf[5],rec_buf[4]>>4,rec_buf[4]&0x0f); - - if ((ret = or51132_writebytes(state, 0x10, 0x00, 0x00))) { - printk(KERN_WARNING "or51132: load_firmware error e\n"); - return ret; - } - return 0; -}; - -static int or51132_init(struct dvb_frontend* fe) -{ - return 0; -} - -static int or51132_read_ber(struct dvb_frontend* fe, u32* ber) -{ - *ber = 0; - return 0; -} - -static int or51132_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) -{ - *ucblocks = 0; - return 0; -} - -static int or51132_sleep(struct dvb_frontend* fe) -{ - return 0; -} - -static int or51132_setmode(struct dvb_frontend* fe) -{ - struct or51132_state* state = fe->demodulator_priv; - u8 cmd_buf1[3] = {0x04, 0x01, 0x5f}; - u8 cmd_buf2[3] = {0x1c, 0x00, 0 }; - - dprintk("setmode %d\n",(int)state->current_modulation); - - switch (state->current_modulation) { - case VSB_8: - /* Auto CH, Auto NTSC rej, MPEGser, MPEG2tr, phase noise-high */ - cmd_buf1[2] = 0x50; - /* REC MODE inv IF spectrum, Normal */ - cmd_buf2[1] = 0x03; - /* Channel MODE ATSC/VSB8 */ - cmd_buf2[2] = 0x06; - break; - /* All QAM modes are: - Auto-deinterleave; MPEGser, MPEG2tr, phase noise-high - REC MODE Normal Carrier Lock */ - case QAM_AUTO: - /* Channel MODE Auto QAM64/256 */ - cmd_buf2[2] = 0x4f; - break; - case QAM_256: - /* Channel MODE QAM256 */ - cmd_buf2[2] = 0x45; - break; - case QAM_64: - /* Channel MODE QAM64 */ - cmd_buf2[2] = 0x43; - break; - default: - printk(KERN_WARNING - "or51132: setmode: Modulation set to unsupported value (%d)\n", - state->current_modulation); - return -EINVAL; - } - - /* Set Receiver 1 register */ - if (or51132_writebuf(state, cmd_buf1, 3)) { - printk(KERN_WARNING "or51132: set_mode error 1\n"); - return -EREMOTEIO; - } - dprintk("set #1 to %02x\n", cmd_buf1[2]); - - /* Set operation mode in Receiver 6 register */ - if (or51132_writebuf(state, cmd_buf2, 3)) { - printk(KERN_WARNING "or51132: set_mode error 2\n"); - return -EREMOTEIO; - } - dprintk("set #6 to 0x%02x%02x\n", cmd_buf2[1], cmd_buf2[2]); - - return 0; -} - -/* Some modulations use the same firmware. This classifies modulations - by the firmware they use. */ -#define MOD_FWCLASS_UNKNOWN 0 -#define MOD_FWCLASS_VSB 1 -#define MOD_FWCLASS_QAM 2 -static int modulation_fw_class(fe_modulation_t modulation) -{ - switch(modulation) { - case VSB_8: - return MOD_FWCLASS_VSB; - case QAM_AUTO: - case QAM_64: - case QAM_256: - return MOD_FWCLASS_QAM; - default: - return MOD_FWCLASS_UNKNOWN; - } -} - -static int or51132_set_parameters(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *p = &fe->dtv_property_cache; - int ret; - struct or51132_state* state = fe->demodulator_priv; - const struct firmware *fw; - const char *fwname; - int clock_mode; - - /* Upload new firmware only if we need a different one */ - if (modulation_fw_class(state->current_modulation) != - modulation_fw_class(p->modulation)) { - switch (modulation_fw_class(p->modulation)) { - case MOD_FWCLASS_VSB: - dprintk("set_parameters VSB MODE\n"); - fwname = OR51132_VSB_FIRMWARE; - - /* Set non-punctured clock for VSB */ - clock_mode = 0; - break; - case MOD_FWCLASS_QAM: - dprintk("set_parameters QAM MODE\n"); - fwname = OR51132_QAM_FIRMWARE; - - /* Set punctured clock for QAM */ - clock_mode = 1; - break; - default: - printk("or51132: Modulation type(%d) UNSUPPORTED\n", - p->modulation); - return -1; - } - printk("or51132: Waiting for firmware upload(%s)...\n", - fwname); - ret = request_firmware(&fw, fwname, state->i2c->dev.parent); - if (ret) { - printk(KERN_WARNING "or51132: No firmware up" - "loaded(timeout or file not found?)\n"); - return ret; - } - ret = or51132_load_firmware(fe, fw); - release_firmware(fw); - if (ret) { - printk(KERN_WARNING "or51132: Writing firmware to " - "device failed!\n"); - return ret; - } - printk("or51132: Firmware upload complete.\n"); - state->config->set_ts_params(fe, clock_mode); - } - /* Change only if we are actually changing the modulation */ - if (state->current_modulation != p->modulation) { - state->current_modulation = p->modulation; - or51132_setmode(fe); - } - - if (fe->ops.tuner_ops.set_params) { - fe->ops.tuner_ops.set_params(fe); - if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); - } - - /* Set to current mode */ - or51132_setmode(fe); - - /* Update current frequency */ - state->current_frequency = p->frequency; - return 0; -} - -static int or51132_get_parameters(struct dvb_frontend* fe) -{ - struct dtv_frontend_properties *p = &fe->dtv_property_cache; - struct or51132_state* state = fe->demodulator_priv; - int status; - int retry = 1; - -start: - /* Receiver Status */ - if ((status = or51132_readreg(state, 0x00)) < 0) { - printk(KERN_WARNING "or51132: get_parameters: error reading receiver status\n"); - return -EREMOTEIO; - } - switch(status&0xff) { - case 0x06: - p->modulation = VSB_8; - break; - case 0x43: - p->modulation = QAM_64; - break; - case 0x45: - p->modulation = QAM_256; - break; - default: - if (retry--) - goto start; - printk(KERN_WARNING "or51132: unknown status 0x%02x\n", - status&0xff); - return -EREMOTEIO; - } - - /* FIXME: Read frequency from frontend, take AFC into account */ - p->frequency = state->current_frequency; - - /* FIXME: How to read inversion setting? Receiver 6 register? */ - p->inversion = INVERSION_AUTO; - - return 0; -} - -static int or51132_read_status(struct dvb_frontend* fe, fe_status_t* status) -{ - struct or51132_state* state = fe->demodulator_priv; - int reg; - - /* Receiver Status */ - if ((reg = or51132_readreg(state, 0x00)) < 0) { - printk(KERN_WARNING "or51132: read_status: error reading receiver status: %d\n", reg); - *status = 0; - return -EREMOTEIO; - } - dprintk("%s: read_status %04x\n", __func__, reg); - - if (reg & 0x0100) /* Receiver Lock */ - *status = FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI| - FE_HAS_SYNC|FE_HAS_LOCK; - else - *status = 0; - return 0; -} - -/* Calculate SNR estimation (scaled by 2^24) - - 8-VSB SNR and QAM equations from Oren datasheets - - For 8-VSB: - SNR[dB] = 10 * log10(897152044.8282 / MSE^2 ) - K - - Where K = 0 if NTSC rejection filter is OFF; and - K = 3 if NTSC rejection filter is ON - - For QAM64: - SNR[dB] = 10 * log10(897152044.8282 / MSE^2 ) - - For QAM256: - SNR[dB] = 10 * log10(907832426.314266 / MSE^2 ) - - We re-write the snr equation as: - SNR * 2^24 = 10*(c - 2*intlog10(MSE)) - Where for QAM256, c = log10(907832426.314266) * 2^24 - and for 8-VSB and QAM64, c = log10(897152044.8282) * 2^24 */ - -static u32 calculate_snr(u32 mse, u32 c) -{ - if (mse == 0) /* No signal */ - return 0; - - mse = 2*intlog10(mse); - if (mse > c) { - /* Negative SNR, which is possible, but realisticly the - demod will lose lock before the signal gets this bad. The - API only allows for unsigned values, so just return 0 */ - return 0; - } - return 10*(c - mse); -} - -static int or51132_read_snr(struct dvb_frontend* fe, u16* snr) -{ - struct or51132_state* state = fe->demodulator_priv; - int noise, reg; - u32 c, usK = 0; - int retry = 1; - -start: - /* SNR after Equalizer */ - noise = or51132_readreg(state, 0x02); - if (noise < 0) { - printk(KERN_WARNING "or51132: read_snr: error reading equalizer\n"); - return -EREMOTEIO; - } - dprintk("read_snr noise (%d)\n", noise); - - /* Read status, contains modulation type for QAM_AUTO and - NTSC filter for VSB */ - reg = or51132_readreg(state, 0x00); - if (reg < 0) { - printk(KERN_WARNING "or51132: read_snr: error reading receiver status\n"); - return -EREMOTEIO; - } - - switch (reg&0xff) { - case 0x06: - if (reg & 0x1000) usK = 3 << 24; - /* Fall through to QAM64 case */ - case 0x43: - c = 150204167; - break; - case 0x45: - c = 150290396; - break; - default: - printk(KERN_WARNING "or51132: unknown status 0x%02x\n", reg&0xff); - if (retry--) goto start; - return -EREMOTEIO; - } - dprintk("%s: modulation %02x, NTSC rej O%s\n", __func__, - reg&0xff, reg&0x1000?"n":"ff"); - - /* Calculate SNR using noise, c, and NTSC rejection correction */ - state->snr = calculate_snr(noise, c) - usK; - *snr = (state->snr) >> 16; - - dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise, - state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16); - - return 0; -} - -static int or51132_read_signal_strength(struct dvb_frontend* fe, u16* strength) -{ - /* Calculate Strength from SNR up to 35dB */ - /* Even though the SNR can go higher than 35dB, there is some comfort */ - /* factor in having a range of strong signals that can show at 100% */ - struct or51132_state* state = (struct or51132_state*) fe->demodulator_priv; - u16 snr; - int ret; - - ret = fe->ops.read_snr(fe, &snr); - if (ret != 0) - return ret; - /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */ - /* scale the range 0 - 35*2^24 into 0 - 65535 */ - if (state->snr >= 8960 * 0x10000) - *strength = 0xffff; - else - *strength = state->snr / 8960; - - return 0; -} - -static int or51132_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings) -{ - fe_tune_settings->min_delay_ms = 500; - fe_tune_settings->step_size = 0; - fe_tune_settings->max_drift = 0; - - return 0; -} - -static void or51132_release(struct dvb_frontend* fe) -{ - struct or51132_state* state = fe->demodulator_priv; - kfree(state); -} - -static struct dvb_frontend_ops or51132_ops; - -struct dvb_frontend* or51132_attach(const struct or51132_config* config, - struct i2c_adapter* i2c) -{ - struct or51132_state* state = NULL; - - /* Allocate memory for the internal state */ - state = kzalloc(sizeof(struct or51132_state), GFP_KERNEL); - if (state == NULL) - return NULL; - - /* Setup the state */ - state->config = config; - state->i2c = i2c; - state->current_frequency = -1; - state->current_modulation = -1; - - /* Create dvb_frontend */ - memcpy(&state->frontend.ops, &or51132_ops, sizeof(struct dvb_frontend_ops)); - state->frontend.demodulator_priv = state; - return &state->frontend; -} - -static struct dvb_frontend_ops or51132_ops = { - .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, - .info = { - .name = "Oren OR51132 VSB/QAM Frontend", - .frequency_min = 44000000, - .frequency_max = 958000000, - .frequency_stepsize = 166666, - .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | - FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | - FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_QAM_AUTO | - FE_CAN_8VSB - }, - - .release = or51132_release, - - .init = or51132_init, - .sleep = or51132_sleep, - - .set_frontend = or51132_set_parameters, - .get_frontend = or51132_get_parameters, - .get_tune_settings = or51132_get_tune_settings, - - .read_status = or51132_read_status, - .read_ber = or51132_read_ber, - .read_signal_strength = or51132_read_signal_strength, - .read_snr = or51132_read_snr, - .read_ucblocks = or51132_read_ucblocks, -}; - -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); - -MODULE_DESCRIPTION("OR51132 ATSC [pcHDTV HD-3000] (8VSB & ITU J83 AnnexB FEC QAM64/256) Demodulator Driver"); -MODULE_AUTHOR("Kirk Lapray"); -MODULE_AUTHOR("Trent Piepho"); -MODULE_LICENSE("GPL"); - -EXPORT_SYMBOL(or51132_attach); - -/* - * Local variables: - * c-basic-offset: 8 - * End: - */ |