diff options
Diffstat (limited to 'drivers/spi/spi-sh-msiof.c')
| -rw-r--r-- | drivers/spi/spi-sh-msiof.c | 397 |
1 files changed, 156 insertions, 241 deletions
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 8a98c313548e..94a867967e02 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -20,6 +20,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/sh_dma.h> @@ -62,135 +63,6 @@ struct sh_msiof_spi_priv { #define MAX_SS 3 /* Maximum number of native chip selects */ -#define SITMDR1 0x00 /* Transmit Mode Register 1 */ -#define SITMDR2 0x04 /* Transmit Mode Register 2 */ -#define SITMDR3 0x08 /* Transmit Mode Register 3 */ -#define SIRMDR1 0x10 /* Receive Mode Register 1 */ -#define SIRMDR2 0x14 /* Receive Mode Register 2 */ -#define SIRMDR3 0x18 /* Receive Mode Register 3 */ -#define SITSCR 0x20 /* Transmit Clock Select Register */ -#define SIRSCR 0x22 /* Receive Clock Select Register (SH, A1, APE6) */ -#define SICTR 0x28 /* Control Register */ -#define SIFCTR 0x30 /* FIFO Control Register */ -#define SISTR 0x40 /* Status Register */ -#define SIIER 0x44 /* Interrupt Enable Register */ -#define SITDR1 0x48 /* Transmit Control Data Register 1 (SH, A1) */ -#define SITDR2 0x4c /* Transmit Control Data Register 2 (SH, A1) */ -#define SITFDR 0x50 /* Transmit FIFO Data Register */ -#define SIRDR1 0x58 /* Receive Control Data Register 1 (SH, A1) */ -#define SIRDR2 0x5c /* Receive Control Data Register 2 (SH, A1) */ -#define SIRFDR 0x60 /* Receive FIFO Data Register */ - -/* SITMDR1 and SIRMDR1 */ -#define SIMDR1_TRMD BIT(31) /* Transfer Mode (1 = Master mode) */ -#define SIMDR1_SYNCMD_MASK GENMASK(29, 28) /* SYNC Mode */ -#define SIMDR1_SYNCMD_SPI (2 << 28) /* Level mode/SPI */ -#define SIMDR1_SYNCMD_LR (3 << 28) /* L/R mode */ -#define SIMDR1_SYNCAC_SHIFT 25 /* Sync Polarity (1 = Active-low) */ -#define SIMDR1_BITLSB_SHIFT 24 /* MSB/LSB First (1 = LSB first) */ -#define SIMDR1_DTDL_SHIFT 20 /* Data Pin Bit Delay for MSIOF_SYNC */ -#define SIMDR1_SYNCDL_SHIFT 16 /* Frame Sync Signal Timing Delay */ -#define SIMDR1_FLD_MASK GENMASK(3, 2) /* Frame Sync Signal Interval (0-3) */ -#define SIMDR1_FLD_SHIFT 2 -#define SIMDR1_XXSTP BIT(0) /* Transmission/Reception Stop on FIFO */ -/* SITMDR1 */ -#define SITMDR1_PCON BIT(30) /* Transfer Signal Connection */ -#define SITMDR1_SYNCCH_MASK GENMASK(27, 26) /* Sync Signal Channel Select */ -#define SITMDR1_SYNCCH_SHIFT 26 /* 0=MSIOF_SYNC, 1=MSIOF_SS1, 2=MSIOF_SS2 */ - -/* SITMDR2 and SIRMDR2 */ -#define SIMDR2_BITLEN1(i) (((i) - 1) << 24) /* Data Size (8-32 bits) */ -#define SIMDR2_WDLEN1(i) (((i) - 1) << 16) /* Word Count (1-64/256 (SH, A1))) */ -#define SIMDR2_GRPMASK1 BIT(0) /* Group Output Mask 1 (SH, A1) */ - -/* SITSCR and SIRSCR */ -#define SISCR_BRPS_MASK GENMASK(12, 8) /* Prescaler Setting (1-32) */ -#define SISCR_BRPS(i) (((i) - 1) << 8) -#define SISCR_BRDV_MASK GENMASK(2, 0) /* Baud Rate Generator's Division Ratio */ -#define SISCR_BRDV_DIV_2 0 -#define SISCR_BRDV_DIV_4 1 -#define SISCR_BRDV_DIV_8 2 -#define SISCR_BRDV_DIV_16 3 -#define SISCR_BRDV_DIV_32 4 -#define SISCR_BRDV_DIV_1 7 - -/* SICTR */ -#define SICTR_TSCKIZ_MASK GENMASK(31, 30) /* Transmit Clock I/O Polarity Select */ -#define SICTR_TSCKIZ_SCK BIT(31) /* Disable SCK when TX disabled */ -#define SICTR_TSCKIZ_POL_SHIFT 30 /* Transmit Clock Polarity */ -#define SICTR_RSCKIZ_MASK GENMASK(29, 28) /* Receive Clock Polarity Select */ -#define SICTR_RSCKIZ_SCK BIT(29) /* Must match CTR_TSCKIZ_SCK */ -#define SICTR_RSCKIZ_POL_SHIFT 28 /* Receive Clock Polarity */ -#define SICTR_TEDG_SHIFT 27 /* Transmit Timing (1 = falling edge) */ -#define SICTR_REDG_SHIFT 26 /* Receive Timing (1 = falling edge) */ -#define SICTR_TXDIZ_MASK GENMASK(23, 22) /* Pin Output When TX is Disabled */ -#define SICTR_TXDIZ_LOW (0 << 22) /* 0 */ -#define SICTR_TXDIZ_HIGH (1 << 22) /* 1 */ -#define SICTR_TXDIZ_HIZ (2 << 22) /* High-impedance */ -#define SICTR_TSCKE BIT(15) /* Transmit Serial Clock Output Enable */ -#define SICTR_TFSE BIT(14) /* Transmit Frame Sync Signal Output Enable */ -#define SICTR_TXE BIT(9) /* Transmit Enable */ -#define SICTR_RXE BIT(8) /* Receive Enable */ -#define SICTR_TXRST BIT(1) /* Transmit Reset */ -#define SICTR_RXRST BIT(0) /* Receive Reset */ - -/* SIFCTR */ -#define SIFCTR_TFWM_MASK GENMASK(31, 29) /* Transmit FIFO Watermark */ -#define SIFCTR_TFWM_64 (0UL << 29) /* Transfer Request when 64 empty stages */ -#define SIFCTR_TFWM_32 (1UL << 29) /* Transfer Request when 32 empty stages */ -#define SIFCTR_TFWM_24 (2UL << 29) /* Transfer Request when 24 empty stages */ -#define SIFCTR_TFWM_16 (3UL << 29) /* Transfer Request when 16 empty stages */ -#define SIFCTR_TFWM_12 (4UL << 29) /* Transfer Request when 12 empty stages */ -#define SIFCTR_TFWM_8 (5UL << 29) /* Transfer Request when 8 empty stages */ -#define SIFCTR_TFWM_4 (6UL << 29) /* Transfer Request when 4 empty stages */ -#define SIFCTR_TFWM_1 (7UL << 29) /* Transfer Request when 1 empty stage */ -#define SIFCTR_TFUA_MASK GENMASK(26, 20) /* Transmit FIFO Usable Area */ -#define SIFCTR_TFUA_SHIFT 20 -#define SIFCTR_TFUA(i) ((i) << SIFCTR_TFUA_SHIFT) -#define SIFCTR_RFWM_MASK GENMASK(15, 13) /* Receive FIFO Watermark */ -#define SIFCTR_RFWM_1 (0 << 13) /* Transfer Request when 1 valid stages */ -#define SIFCTR_RFWM_4 (1 << 13) /* Transfer Request when 4 valid stages */ -#define SIFCTR_RFWM_8 (2 << 13) /* Transfer Request when 8 valid stages */ -#define SIFCTR_RFWM_16 (3 << 13) /* Transfer Request when 16 valid stages */ -#define SIFCTR_RFWM_32 (4 << 13) /* Transfer Request when 32 valid stages */ -#define SIFCTR_RFWM_64 (5 << 13) /* Transfer Request when 64 valid stages */ -#define SIFCTR_RFWM_128 (6 << 13) /* Transfer Request when 128 valid stages */ -#define SIFCTR_RFWM_256 (7 << 13) /* Transfer Request when 256 valid stages */ -#define SIFCTR_RFUA_MASK GENMASK(12, 4) /* Receive FIFO Usable Area (0x40 = full) */ -#define SIFCTR_RFUA_SHIFT 4 -#define SIFCTR_RFUA(i) ((i) << SIFCTR_RFUA_SHIFT) - -/* SISTR */ -#define SISTR_TFEMP BIT(29) /* Transmit FIFO Empty */ -#define SISTR_TDREQ BIT(28) /* Transmit Data Transfer Request */ -#define SISTR_TEOF BIT(23) /* Frame Transmission End */ -#define SISTR_TFSERR BIT(21) /* Transmit Frame Synchronization Error */ -#define SISTR_TFOVF BIT(20) /* Transmit FIFO Overflow */ -#define SISTR_TFUDF BIT(19) /* Transmit FIFO Underflow */ -#define SISTR_RFFUL BIT(13) /* Receive FIFO Full */ -#define SISTR_RDREQ BIT(12) /* Receive Data Transfer Request */ -#define SISTR_REOF BIT(7) /* Frame Reception End */ -#define SISTR_RFSERR BIT(5) /* Receive Frame Synchronization Error */ -#define SISTR_RFUDF BIT(4) /* Receive FIFO Underflow */ -#define SISTR_RFOVF BIT(3) /* Receive FIFO Overflow */ - -/* SIIER */ -#define SIIER_TDMAE BIT(31) /* Transmit Data DMA Transfer Req. Enable */ -#define SIIER_TFEMPE BIT(29) /* Transmit FIFO Empty Enable */ -#define SIIER_TDREQE BIT(28) /* Transmit Data Transfer Request Enable */ -#define SIIER_TEOFE BIT(23) /* Frame Transmission End Enable */ -#define SIIER_TFSERRE BIT(21) /* Transmit Frame Sync Error Enable */ -#define SIIER_TFOVFE BIT(20) /* Transmit FIFO Overflow Enable */ -#define SIIER_TFUDFE BIT(19) /* Transmit FIFO Underflow Enable */ -#define SIIER_RDMAE BIT(15) /* Receive Data DMA Transfer Req. Enable */ -#define SIIER_RFFULE BIT(13) /* Receive FIFO Full Enable */ -#define SIIER_RDREQE BIT(12) /* Receive Data Transfer Request Enable */ -#define SIIER_REOFE BIT(7) /* Frame Reception End Enable */ -#define SIIER_RFSERRE BIT(5) /* Receive Frame Sync Error Enable */ -#define SIIER_RFUDFE BIT(4) /* Receive FIFO Underflow Enable */ -#define SIIER_RFOVFE BIT(3) /* Receive FIFO Overflow Enable */ - - static u32 sh_msiof_read(struct sh_msiof_spi_priv *p, int reg_offs) { switch (reg_offs) { @@ -255,11 +127,6 @@ static void sh_msiof_spi_reset_regs(struct sh_msiof_spi_priv *p) 100); } -static const u32 sh_msiof_spi_div_array[] = { - SISCR_BRDV_DIV_1, SISCR_BRDV_DIV_2, SISCR_BRDV_DIV_4, - SISCR_BRDV_DIV_8, SISCR_BRDV_DIV_16, SISCR_BRDV_DIV_32, -}; - static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p, struct spi_transfer *t) { @@ -298,7 +165,9 @@ static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p, t->effective_speed_hz = parent_rate / (brps << div_pow); - scr = sh_msiof_spi_div_array[div_pow] | SISCR_BRPS(brps); + /* div_pow == 0 maps to SISCR_BRDV_DIV_1 == all ones */ + scr = FIELD_PREP(SISCR_BRDV, div_pow - 1) | + FIELD_PREP(SISCR_BRPS, brps - 1); sh_msiof_write(p, SITSCR, scr); if (!(p->ctlr->flags & SPI_CONTROLLER_MUST_TX)) sh_msiof_write(p, SIRSCR, scr); @@ -340,18 +209,19 @@ static u32 sh_msiof_spi_get_dtdl_and_syncdl(struct sh_msiof_spi_priv *p) return 0; } - val = sh_msiof_get_delay_bit(p->info->dtdl) << SIMDR1_DTDL_SHIFT; - val |= sh_msiof_get_delay_bit(p->info->syncdl) << SIMDR1_SYNCDL_SHIFT; + val = FIELD_PREP(SIMDR1_DTDL, sh_msiof_get_delay_bit(p->info->dtdl)) | + FIELD_PREP(SIMDR1_SYNCDL, + sh_msiof_get_delay_bit(p->info->syncdl)); return val; } static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p, u32 ss, - u32 cpol, u32 cpha, - u32 tx_hi_z, u32 lsb_first, u32 cs_high) + bool cpol, bool cpha, bool tx_hi_z, + bool lsb_first, bool cs_high) { + bool edge; u32 tmp; - int edge; /* * CPOL CPHA TSCKIZ RSCKIZ TEDG REDG @@ -360,16 +230,18 @@ static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p, u32 ss, * 1 0 11 11 0 0 * 1 1 11 11 1 1 */ - tmp = SIMDR1_SYNCMD_SPI | 1 << SIMDR1_FLD_SHIFT | SIMDR1_XXSTP; - tmp |= !cs_high << SIMDR1_SYNCAC_SHIFT; - tmp |= lsb_first << SIMDR1_BITLSB_SHIFT; + tmp = FIELD_PREP(SIMDR1_SYNCMD, SIMDR1_SYNCMD_SPI) | + FIELD_PREP(SIMDR1_FLD, 1) | SIMDR1_XXSTP | + FIELD_PREP(SIMDR1_SYNCAC, !cs_high) | + FIELD_PREP(SIMDR1_BITLSB, lsb_first); tmp |= sh_msiof_spi_get_dtdl_and_syncdl(p); if (spi_controller_is_target(p->ctlr)) { sh_msiof_write(p, SITMDR1, tmp | SITMDR1_PCON); } else { sh_msiof_write(p, SITMDR1, tmp | SIMDR1_TRMD | SITMDR1_PCON | - (ss < MAX_SS ? ss : 0) << SITMDR1_SYNCCH_SHIFT); + FIELD_PREP(SITMDR1_SYNCCH, + ss < MAX_SS ? ss : 0)); } if (p->ctlr->flags & SPI_CONTROLLER_MUST_TX) { /* These bits are reserved if RX needs TX */ @@ -378,30 +250,42 @@ static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p, u32 ss, sh_msiof_write(p, SIRMDR1, tmp); tmp = 0; - tmp |= SICTR_TSCKIZ_SCK | cpol << SICTR_TSCKIZ_POL_SHIFT; - tmp |= SICTR_RSCKIZ_SCK | cpol << SICTR_RSCKIZ_POL_SHIFT; + tmp |= SICTR_TSCKIZ_SCK | FIELD_PREP(SICTR_TSCKIZ_POL, cpol); + tmp |= SICTR_RSCKIZ_SCK | FIELD_PREP(SICTR_RSCKIZ_POL, cpol); edge = cpol ^ !cpha; - tmp |= edge << SICTR_TEDG_SHIFT; - tmp |= edge << SICTR_REDG_SHIFT; - tmp |= tx_hi_z ? SICTR_TXDIZ_HIZ : SICTR_TXDIZ_LOW; + tmp |= FIELD_PREP(SICTR_TEDG, edge); + tmp |= FIELD_PREP(SICTR_REDG, edge); + tmp |= FIELD_PREP(SICTR_TXDIZ, + tx_hi_z ? SICTR_TXDIZ_HIZ : SICTR_TXDIZ_LOW); sh_msiof_write(p, SICTR, tmp); } static void sh_msiof_spi_set_mode_regs(struct sh_msiof_spi_priv *p, const void *tx_buf, void *rx_buf, - u32 bits, u32 words) + u32 bits, u32 words1, u32 words2) { - u32 dr2 = SIMDR2_BITLEN1(bits) | SIMDR2_WDLEN1(words); + u32 dr2 = FIELD_PREP(SIMDR2_GRP, words2 ? 1 : 0) | + FIELD_PREP(SIMDR2_BITLEN1, bits - 1) | + FIELD_PREP(SIMDR2_WDLEN1, words1 - 1); if (tx_buf || (p->ctlr->flags & SPI_CONTROLLER_MUST_TX)) sh_msiof_write(p, SITMDR2, dr2); else - sh_msiof_write(p, SITMDR2, dr2 | SIMDR2_GRPMASK1); + sh_msiof_write(p, SITMDR2, dr2 | SIMDR2_GRPMASK); if (rx_buf) sh_msiof_write(p, SIRMDR2, dr2); + + if (words2) { + u32 dr3 = FIELD_PREP(SIMDR3_BITLEN2, bits - 1) | + FIELD_PREP(SIMDR3_WDLEN2, words2 - 1); + + sh_msiof_write(p, SITMDR3, dr3); + if (rx_buf) + sh_msiof_write(p, SIRMDR3, dr3); + } } static void sh_msiof_reset_str(struct sh_msiof_spi_priv *p) @@ -411,140 +295,154 @@ static void sh_msiof_reset_str(struct sh_msiof_spi_priv *p) } static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p, - const void *tx_buf, int words, int fs) + const void *tx_buf, unsigned int words, + unsigned int fs) { const u8 *buf_8 = tx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) sh_msiof_write(p, SITFDR, buf_8[k] << fs); } static void sh_msiof_spi_write_fifo_16(struct sh_msiof_spi_priv *p, - const void *tx_buf, int words, int fs) + const void *tx_buf, unsigned int words, + unsigned int fs) { const u16 *buf_16 = tx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) sh_msiof_write(p, SITFDR, buf_16[k] << fs); } static void sh_msiof_spi_write_fifo_16u(struct sh_msiof_spi_priv *p, - const void *tx_buf, int words, int fs) + const void *tx_buf, unsigned int words, + unsigned int fs) { const u16 *buf_16 = tx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) sh_msiof_write(p, SITFDR, get_unaligned(&buf_16[k]) << fs); } static void sh_msiof_spi_write_fifo_32(struct sh_msiof_spi_priv *p, - const void *tx_buf, int words, int fs) + const void *tx_buf, unsigned int words, + unsigned int fs) { const u32 *buf_32 = tx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) sh_msiof_write(p, SITFDR, buf_32[k] << fs); } static void sh_msiof_spi_write_fifo_32u(struct sh_msiof_spi_priv *p, - const void *tx_buf, int words, int fs) + const void *tx_buf, unsigned int words, + unsigned int fs) { const u32 *buf_32 = tx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) sh_msiof_write(p, SITFDR, get_unaligned(&buf_32[k]) << fs); } static void sh_msiof_spi_write_fifo_s32(struct sh_msiof_spi_priv *p, - const void *tx_buf, int words, int fs) + const void *tx_buf, unsigned int words, + unsigned int fs) { const u32 *buf_32 = tx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) sh_msiof_write(p, SITFDR, swab32(buf_32[k] << fs)); } static void sh_msiof_spi_write_fifo_s32u(struct sh_msiof_spi_priv *p, - const void *tx_buf, int words, int fs) + const void *tx_buf, + unsigned int words, unsigned int fs) { const u32 *buf_32 = tx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) sh_msiof_write(p, SITFDR, swab32(get_unaligned(&buf_32[k]) << fs)); } static void sh_msiof_spi_read_fifo_8(struct sh_msiof_spi_priv *p, - void *rx_buf, int words, int fs) + void *rx_buf, unsigned int words, + unsigned int fs) { u8 *buf_8 = rx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) buf_8[k] = sh_msiof_read(p, SIRFDR) >> fs; } static void sh_msiof_spi_read_fifo_16(struct sh_msiof_spi_priv *p, - void *rx_buf, int words, int fs) + void *rx_buf, unsigned int words, + unsigned int fs) { u16 *buf_16 = rx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) buf_16[k] = sh_msiof_read(p, SIRFDR) >> fs; } static void sh_msiof_spi_read_fifo_16u(struct sh_msiof_spi_priv *p, - void *rx_buf, int words, int fs) + void *rx_buf, unsigned int words, + unsigned int fs) { u16 *buf_16 = rx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) put_unaligned(sh_msiof_read(p, SIRFDR) >> fs, &buf_16[k]); } static void sh_msiof_spi_read_fifo_32(struct sh_msiof_spi_priv *p, - void *rx_buf, int words, int fs) + void *rx_buf, unsigned int words, + unsigned int fs) { u32 *buf_32 = rx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) buf_32[k] = sh_msiof_read(p, SIRFDR) >> fs; } static void sh_msiof_spi_read_fifo_32u(struct sh_msiof_spi_priv *p, - void *rx_buf, int words, int fs) + void *rx_buf, unsigned int words, + unsigned int fs) { u32 *buf_32 = rx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) put_unaligned(sh_msiof_read(p, SIRFDR) >> fs, &buf_32[k]); } static void sh_msiof_spi_read_fifo_s32(struct sh_msiof_spi_priv *p, - void *rx_buf, int words, int fs) + void *rx_buf, unsigned int words, + unsigned int fs) { u32 *buf_32 = rx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) buf_32[k] = swab32(sh_msiof_read(p, SIRFDR) >> fs); } static void sh_msiof_spi_read_fifo_s32u(struct sh_msiof_spi_priv *p, - void *rx_buf, int words, int fs) + void *rx_buf, unsigned int words, + unsigned int fs) { u32 *buf_32 = rx_buf; - int k; + unsigned int k; for (k = 0; k < words; k++) put_unaligned(swab32(sh_msiof_read(p, SIRFDR) >> fs), &buf_32[k]); @@ -564,12 +462,12 @@ static int sh_msiof_spi_setup(struct spi_device *spi) return 0; /* Configure native chip select mode/polarity early */ - clr = SIMDR1_SYNCMD_MASK; - set = SIMDR1_SYNCMD_SPI; + clr = SIMDR1_SYNCMD; + set = FIELD_PREP(SIMDR1_SYNCMD, SIMDR1_SYNCMD_SPI); if (spi->mode & SPI_CS_HIGH) - clr |= BIT(SIMDR1_SYNCAC_SHIFT); + clr |= SIMDR1_SYNCAC; else - set |= BIT(SIMDR1_SYNCAC_SHIFT); + set |= SIMDR1_SYNCAC; pm_runtime_get_sync(&p->pdev->dev); tmp = sh_msiof_read(p, SITMDR1) & ~clr; sh_msiof_write(p, SITMDR1, tmp | set | SIMDR1_TRMD | SITMDR1_PCON); @@ -586,7 +484,8 @@ static int sh_msiof_prepare_message(struct spi_controller *ctlr, { struct sh_msiof_spi_priv *p = spi_controller_get_devdata(ctlr); const struct spi_device *spi = msg->spi; - u32 ss, cs_high; + bool cs_high; + u32 ss; /* Configure pins before asserting CS */ if (spi_get_csgpiod(spi, 0)) { @@ -594,12 +493,11 @@ static int sh_msiof_prepare_message(struct spi_controller *ctlr, cs_high = p->native_cs_high; } else { ss = spi_get_chipselect(spi, 0); - cs_high = !!(spi->mode & SPI_CS_HIGH); + cs_high = spi->mode & SPI_CS_HIGH; } - sh_msiof_spi_set_pin_regs(p, ss, !!(spi->mode & SPI_CPOL), - !!(spi->mode & SPI_CPHA), - !!(spi->mode & SPI_3WIRE), - !!(spi->mode & SPI_LSB_FIRST), cs_high); + sh_msiof_spi_set_pin_regs(p, ss, spi->mode & SPI_CPOL, + spi->mode & SPI_CPHA, spi->mode & SPI_3WIRE, + spi->mode & SPI_LSB_FIRST, cs_high); return 0; } @@ -672,20 +570,22 @@ static int sh_msiof_wait_for_completion(struct sh_msiof_spi_priv *p, static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, void (*tx_fifo)(struct sh_msiof_spi_priv *, - const void *, int, int), + const void *, unsigned int, + unsigned int), void (*rx_fifo)(struct sh_msiof_spi_priv *, - void *, int, int), + void *, unsigned int, + unsigned int), const void *tx_buf, void *rx_buf, - int words, int bits) + unsigned int words, unsigned int bits) { - int fifo_shift; + unsigned int fifo_shift; int ret; /* limit maximum word transfer to rx/tx fifo size */ if (tx_buf) - words = min_t(int, words, p->tx_fifo_size); + words = min(words, p->tx_fifo_size); if (rx_buf) - words = min_t(int, words, p->rx_fifo_size); + words = min(words, p->rx_fifo_size); /* the fifo contents need shifting */ fifo_shift = 32 - bits; @@ -694,7 +594,7 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, sh_msiof_write(p, SIFCTR, 0); /* setup msiof transfer mode registers */ - sh_msiof_spi_set_mode_regs(p, tx_buf, rx_buf, bits, words); + sh_msiof_spi_set_mode_regs(p, tx_buf, rx_buf, bits, words, 0); sh_msiof_write(p, SIIER, SIIER_TEOFE | SIIER_REOFE); /* write tx fifo */ @@ -744,10 +644,12 @@ static void sh_msiof_dma_complete(void *arg) } static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx, - void *rx, unsigned int len) + void *rx, unsigned int len, + unsigned int max_wdlen) { u32 ier_bits = 0; struct dma_async_tx_descriptor *desc_tx = NULL, *desc_rx = NULL; + unsigned int words1, words2; dma_cookie_t cookie; int ret; @@ -789,10 +691,14 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx, } /* 1 stage FIFO watermarks for DMA */ - sh_msiof_write(p, SIFCTR, SIFCTR_TFWM_1 | SIFCTR_RFWM_1); + sh_msiof_write(p, SIFCTR, + FIELD_PREP(SIFCTR_TFWM, SIFCTR_TFWM_1) | + FIELD_PREP(SIFCTR_RFWM, SIFCTR_RFWM_1)); /* setup msiof transfer mode registers (32-bit words) */ - sh_msiof_spi_set_mode_regs(p, tx, rx, 32, len / 4); + words1 = min(len / 4, max_wdlen); + words2 = len / 4 - words1; + sh_msiof_spi_set_mode_regs(p, tx, rx, 32, words1, words2); sh_msiof_write(p, SIIER, ier_bits); @@ -911,9 +817,12 @@ static int sh_msiof_transfer_one(struct spi_controller *ctlr, struct spi_transfer *t) { struct sh_msiof_spi_priv *p = spi_controller_get_devdata(ctlr); + unsigned int max_wdlen = FIELD_MAX(SIMDR2_WDLEN1) + 1; void (*copy32)(u32 *, const u32 *, unsigned int); - void (*tx_fifo)(struct sh_msiof_spi_priv *, const void *, int, int); - void (*rx_fifo)(struct sh_msiof_spi_priv *, void *, int, int); + void (*tx_fifo)(struct sh_msiof_spi_priv *, const void *, unsigned int, + unsigned int); + void (*rx_fifo)(struct sh_msiof_spi_priv *, void *, unsigned int, + unsigned int); const void *tx_buf = t->tx_buf; void *rx_buf = t->rx_buf; unsigned int len = t->len; @@ -931,17 +840,17 @@ static int sh_msiof_transfer_one(struct spi_controller *ctlr, if (!spi_controller_is_target(p->ctlr)) sh_msiof_spi_set_clk_regs(p, t); + if (tx_buf) + max_wdlen = min(max_wdlen, p->tx_fifo_size); + if (rx_buf) + max_wdlen = min(max_wdlen, p->rx_fifo_size); + while (ctlr->dma_tx && len > 15) { /* * DMA supports 32-bit words only, hence pack 8-bit and 16-bit * words, with byte resp. word swapping. */ - unsigned int l = 0; - - if (tx_buf) - l = min(round_down(len, 4), p->tx_fifo_size * 4); - if (rx_buf) - l = min(round_down(len, 4), p->rx_fifo_size * 4); + unsigned int l = min(round_down(len, 4), 2 * max_wdlen * 4); if (bits <= 8) { copy32 = copy_bswap32; @@ -954,7 +863,7 @@ static int sh_msiof_transfer_one(struct spi_controller *ctlr, if (tx_buf) copy32(p->tx_dma_page, tx_buf, l / 4); - ret = sh_msiof_dma_once(p, tx_buf, rx_buf, l); + ret = sh_msiof_dma_once(p, tx_buf, rx_buf, l, max_wdlen); if (ret == -EAGAIN) { dev_warn_once(&p->pdev->dev, "DMA not available, falling back to PIO\n"); @@ -1061,7 +970,7 @@ static const struct sh_msiof_chipdata rcar_gen2_data = { .bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16) | SPI_BPW_MASK(24) | SPI_BPW_MASK(32), .tx_fifo_size = 64, - .rx_fifo_size = 64, + .rx_fifo_size = 128, .ctlr_flags = SPI_CONTROLLER_MUST_TX, .min_div_pow = 0, }; @@ -1070,7 +979,16 @@ static const struct sh_msiof_chipdata rcar_gen3_data = { .bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16) | SPI_BPW_MASK(24) | SPI_BPW_MASK(32), .tx_fifo_size = 64, - .rx_fifo_size = 64, + .rx_fifo_size = 256, + .ctlr_flags = SPI_CONTROLLER_MUST_TX, + .min_div_pow = 1, +}; + +static const struct sh_msiof_chipdata rcar_gen4_data = { + .bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16) | + SPI_BPW_MASK(24) | SPI_BPW_MASK(32), + .tx_fifo_size = 256, + .rx_fifo_size = 256, .ctlr_flags = SPI_CONTROLLER_MUST_TX, .min_div_pow = 1, }; @@ -1079,7 +997,7 @@ static const struct sh_msiof_chipdata rcar_r8a7795_data = { .bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16) | SPI_BPW_MASK(24) | SPI_BPW_MASK(32), .tx_fifo_size = 64, - .rx_fifo_size = 64, + .rx_fifo_size = 256, .ctlr_flags = SPI_CONTROLLER_MUST_TX, .min_div_pow = 1, .flags = SH_MSIOF_FLAG_FIXED_DTDL_200, @@ -1087,20 +1005,14 @@ static const struct sh_msiof_chipdata rcar_r8a7795_data = { static const struct of_device_id sh_msiof_match[] __maybe_unused = { { .compatible = "renesas,sh-mobile-msiof", .data = &sh_data }, - { .compatible = "renesas,msiof-r8a7743", .data = &rcar_gen2_data }, - { .compatible = "renesas,msiof-r8a7745", .data = &rcar_gen2_data }, - { .compatible = "renesas,msiof-r8a7790", .data = &rcar_gen2_data }, - { .compatible = "renesas,msiof-r8a7791", .data = &rcar_gen2_data }, - { .compatible = "renesas,msiof-r8a7792", .data = &rcar_gen2_data }, - { .compatible = "renesas,msiof-r8a7793", .data = &rcar_gen2_data }, - { .compatible = "renesas,msiof-r8a7794", .data = &rcar_gen2_data }, { .compatible = "renesas,rcar-gen2-msiof", .data = &rcar_gen2_data }, { .compatible = "renesas,msiof-r8a7795", .data = &rcar_r8a7795_data }, - { .compatible = "renesas,msiof-r8a7796", .data = &rcar_gen3_data }, { .compatible = "renesas,rcar-gen3-msiof", .data = &rcar_gen3_data }, - { .compatible = "renesas,rcar-gen4-msiof", .data = &rcar_gen3_data }, + { .compatible = "renesas,msiof-r8a779a0", .data = &rcar_gen3_data }, + { .compatible = "renesas,msiof-r8a779f0", .data = &rcar_gen3_data }, + { .compatible = "renesas,rcar-gen4-msiof", .data = &rcar_gen4_data }, { .compatible = "renesas,sh-msiof", .data = &sh_data }, /* Deprecated */ - {}, + { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sh_msiof_match); @@ -1276,20 +1188,26 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) const struct sh_msiof_chipdata *chipdata; struct sh_msiof_spi_info *info; struct sh_msiof_spi_priv *p; + struct device *dev = &pdev->dev; unsigned long clksrc; int i; int ret; - chipdata = of_device_get_match_data(&pdev->dev); + /* Check whether MSIOF is used as I2S mode or SPI mode by checking "port" node */ + struct device_node *port __free(device_node) = of_graph_get_next_port(dev->of_node, NULL); + if (port) /* It was MSIOF-I2S */ + return -ENODEV; + + chipdata = of_device_get_match_data(dev); if (chipdata) { - info = sh_msiof_spi_parse_dt(&pdev->dev); + info = sh_msiof_spi_parse_dt(dev); } else { chipdata = (const void *)pdev->id_entry->driver_data; - info = dev_get_platdata(&pdev->dev); + info = dev_get_platdata(dev); } if (!info) { - dev_err(&pdev->dev, "failed to obtain device info\n"); + dev_err(dev, "failed to obtain device info\n"); return -ENXIO; } @@ -1297,11 +1215,9 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) info->dtdl = 200; if (info->mode == MSIOF_SPI_TARGET) - ctlr = spi_alloc_target(&pdev->dev, - sizeof(struct sh_msiof_spi_priv)); + ctlr = spi_alloc_target(dev, sizeof(struct sh_msiof_spi_priv)); else - ctlr = spi_alloc_host(&pdev->dev, - sizeof(struct sh_msiof_spi_priv)); + ctlr = spi_alloc_host(dev, sizeof(struct sh_msiof_spi_priv)); if (ctlr == NULL) return -ENOMEM; @@ -1315,9 +1231,9 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) init_completion(&p->done); init_completion(&p->done_txdma); - p->clk = devm_clk_get(&pdev->dev, NULL); + p->clk = devm_clk_get(dev, NULL); if (IS_ERR(p->clk)) { - dev_err(&pdev->dev, "cannot get clock\n"); + dev_err(dev, "cannot get clock\n"); ret = PTR_ERR(p->clk); goto err1; } @@ -1334,15 +1250,14 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) goto err1; } - ret = devm_request_irq(&pdev->dev, i, sh_msiof_spi_irq, 0, - dev_name(&pdev->dev), p); + ret = devm_request_irq(dev, i, sh_msiof_spi_irq, 0, dev_name(dev), p); if (ret) { - dev_err(&pdev->dev, "unable to request irq\n"); + dev_err(dev, "unable to request irq\n"); goto err1; } p->pdev = pdev; - pm_runtime_enable(&pdev->dev); + pm_runtime_enable(dev); /* Platform data may override FIFO sizes */ p->tx_fifo_size = chipdata->tx_fifo_size; @@ -1361,7 +1276,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) ctlr->flags = chipdata->ctlr_flags; ctlr->bus_num = pdev->id; ctlr->num_chipselect = p->info->num_chipselect; - ctlr->dev.of_node = pdev->dev.of_node; + ctlr->dev.of_node = dev->of_node; ctlr->setup = sh_msiof_spi_setup; ctlr->prepare_message = sh_msiof_prepare_message; ctlr->target_abort = sh_msiof_target_abort; @@ -1373,11 +1288,11 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) ret = sh_msiof_request_dma(p); if (ret < 0) - dev_warn(&pdev->dev, "DMA not available, using PIO\n"); + dev_warn(dev, "DMA not available, using PIO\n"); - ret = devm_spi_register_controller(&pdev->dev, ctlr); + ret = devm_spi_register_controller(dev, ctlr); if (ret < 0) { - dev_err(&pdev->dev, "devm_spi_register_controller error.\n"); + dev_err(dev, "devm_spi_register_controller error.\n"); goto err2; } @@ -1385,7 +1300,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) err2: sh_msiof_release_dma(p); - pm_runtime_disable(&pdev->dev); + pm_runtime_disable(dev); err1: spi_controller_put(ctlr); return ret; |