diff options
Diffstat (limited to 'drivers/spi/spi-fsl-dspi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 720 |
1 files changed, 366 insertions, 354 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 545fc8189fb0..bec758e978fb 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -9,26 +9,16 @@ #include <linux/delay.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> -#include <linux/err.h> -#include <linux/errno.h> #include <linux/interrupt.h> -#include <linux/io.h> #include <linux/kernel.h> -#include <linux/math64.h> #include <linux/module.h> -#include <linux/of.h> #include <linux/of_device.h> #include <linux/pinctrl/consumer.h> -#include <linux/platform_device.h> -#include <linux/pm_runtime.h> #include <linux/regmap.h> -#include <linux/sched.h> #include <linux/spi/spi.h> #include <linux/spi/spi-fsl-dspi.h> -#include <linux/spi/spi_bitbang.h> -#include <linux/time.h> -#define DRIVER_NAME "fsl-dspi" +#define DRIVER_NAME "fsl-dspi" #ifdef CONFIG_M5441x #define DSPI_FIFO_SIZE 16 @@ -37,101 +27,97 @@ #endif #define DSPI_DMA_BUFSIZE (DSPI_FIFO_SIZE * 1024) -#define SPI_MCR 0x00 -#define SPI_MCR_MASTER (1 << 31) -#define SPI_MCR_PCSIS (0x3F << 16) -#define SPI_MCR_CLR_TXF (1 << 11) -#define SPI_MCR_CLR_RXF (1 << 10) -#define SPI_MCR_XSPI (1 << 3) - -#define SPI_TCR 0x08 -#define SPI_TCR_GET_TCNT(x) (((x) & 0xffff0000) >> 16) - -#define SPI_CTAR(x) (0x0c + (((x) & 0x3) * 4)) -#define SPI_CTAR_FMSZ(x) (((x) & 0x0000000f) << 27) -#define SPI_CTAR_CPOL(x) ((x) << 26) -#define SPI_CTAR_CPHA(x) ((x) << 25) -#define SPI_CTAR_LSBFE(x) ((x) << 24) -#define SPI_CTAR_PCSSCK(x) (((x) & 0x00000003) << 22) -#define SPI_CTAR_PASC(x) (((x) & 0x00000003) << 20) -#define SPI_CTAR_PDT(x) (((x) & 0x00000003) << 18) -#define SPI_CTAR_PBR(x) (((x) & 0x00000003) << 16) -#define SPI_CTAR_CSSCK(x) (((x) & 0x0000000f) << 12) -#define SPI_CTAR_ASC(x) (((x) & 0x0000000f) << 8) -#define SPI_CTAR_DT(x) (((x) & 0x0000000f) << 4) -#define SPI_CTAR_BR(x) ((x) & 0x0000000f) -#define SPI_CTAR_SCALE_BITS 0xf - -#define SPI_CTAR0_SLAVE 0x0c - -#define SPI_SR 0x2c -#define SPI_SR_EOQF 0x10000000 -#define SPI_SR_TCFQF 0x80000000 -#define SPI_SR_CLEAR 0x9aaf0000 - -#define SPI_RSER_TFFFE BIT(25) -#define SPI_RSER_TFFFD BIT(24) -#define SPI_RSER_RFDFE BIT(17) -#define SPI_RSER_RFDFD BIT(16) - -#define SPI_RSER 0x30 -#define SPI_RSER_EOQFE 0x10000000 -#define SPI_RSER_TCFQE 0x80000000 - -#define SPI_PUSHR 0x34 -#define SPI_PUSHR_CMD_CONT (1 << 15) -#define SPI_PUSHR_CONT (SPI_PUSHR_CMD_CONT << 16) -#define SPI_PUSHR_CMD_CTAS(x) (((x) & 0x0003) << 12) -#define SPI_PUSHR_CTAS(x) (SPI_PUSHR_CMD_CTAS(x) << 16) -#define SPI_PUSHR_CMD_EOQ (1 << 11) -#define SPI_PUSHR_EOQ (SPI_PUSHR_CMD_EOQ << 16) -#define SPI_PUSHR_CMD_CTCNT (1 << 10) -#define SPI_PUSHR_CTCNT (SPI_PUSHR_CMD_CTCNT << 16) -#define SPI_PUSHR_CMD_PCS(x) ((1 << x) & 0x003f) -#define SPI_PUSHR_PCS(x) (SPI_PUSHR_CMD_PCS(x) << 16) -#define SPI_PUSHR_TXDATA(x) ((x) & 0x0000ffff) - -#define SPI_PUSHR_SLAVE 0x34 - -#define SPI_POPR 0x38 -#define SPI_POPR_RXDATA(x) ((x) & 0x0000ffff) - -#define SPI_TXFR0 0x3c -#define SPI_TXFR1 0x40 -#define SPI_TXFR2 0x44 -#define SPI_TXFR3 0x48 -#define SPI_RXFR0 0x7c -#define SPI_RXFR1 0x80 -#define SPI_RXFR2 0x84 -#define SPI_RXFR3 0x88 - -#define SPI_CTARE(x) (0x11c + (((x) & 0x3) * 4)) -#define SPI_CTARE_FMSZE(x) (((x) & 0x1) << 16) -#define SPI_CTARE_DTCP(x) ((x) & 0x7ff) - -#define SPI_SREX 0x13c - -#define SPI_FRAME_BITS(bits) SPI_CTAR_FMSZ((bits) - 1) -#define SPI_FRAME_BITS_MASK SPI_CTAR_FMSZ(0xf) -#define SPI_FRAME_BITS_16 SPI_CTAR_FMSZ(0xf) -#define SPI_FRAME_BITS_8 SPI_CTAR_FMSZ(0x7) - -#define SPI_FRAME_EBITS(bits) SPI_CTARE_FMSZE(((bits) - 1) >> 4) -#define SPI_FRAME_EBITS_MASK SPI_CTARE_FMSZE(1) +#define SPI_MCR 0x00 +#define SPI_MCR_MASTER BIT(31) +#define SPI_MCR_PCSIS (0x3F << 16) +#define SPI_MCR_CLR_TXF BIT(11) +#define SPI_MCR_CLR_RXF BIT(10) +#define SPI_MCR_XSPI BIT(3) + +#define SPI_TCR 0x08 +#define SPI_TCR_GET_TCNT(x) (((x) & GENMASK(31, 16)) >> 16) + +#define SPI_CTAR(x) (0x0c + (((x) & GENMASK(1, 0)) * 4)) +#define SPI_CTAR_FMSZ(x) (((x) << 27) & GENMASK(30, 27)) +#define SPI_CTAR_CPOL BIT(26) +#define SPI_CTAR_CPHA BIT(25) +#define SPI_CTAR_LSBFE BIT(24) +#define SPI_CTAR_PCSSCK(x) (((x) << 22) & GENMASK(23, 22)) +#define SPI_CTAR_PASC(x) (((x) << 20) & GENMASK(21, 20)) +#define SPI_CTAR_PDT(x) (((x) << 18) & GENMASK(19, 18)) +#define SPI_CTAR_PBR(x) (((x) << 16) & GENMASK(17, 16)) +#define SPI_CTAR_CSSCK(x) (((x) << 12) & GENMASK(15, 12)) +#define SPI_CTAR_ASC(x) (((x) << 8) & GENMASK(11, 8)) +#define SPI_CTAR_DT(x) (((x) << 4) & GENMASK(7, 4)) +#define SPI_CTAR_BR(x) ((x) & GENMASK(3, 0)) +#define SPI_CTAR_SCALE_BITS 0xf + +#define SPI_CTAR0_SLAVE 0x0c + +#define SPI_SR 0x2c +#define SPI_SR_TCFQF BIT(31) +#define SPI_SR_EOQF BIT(28) +#define SPI_SR_TFUF BIT(27) +#define SPI_SR_TFFF BIT(25) +#define SPI_SR_CMDTCF BIT(23) +#define SPI_SR_SPEF BIT(21) +#define SPI_SR_RFOF BIT(19) +#define SPI_SR_TFIWF BIT(18) +#define SPI_SR_RFDF BIT(17) +#define SPI_SR_CMDFFF BIT(16) +#define SPI_SR_CLEAR (SPI_SR_TCFQF | SPI_SR_EOQF | \ + SPI_SR_TFUF | SPI_SR_TFFF | \ + SPI_SR_CMDTCF | SPI_SR_SPEF | \ + SPI_SR_RFOF | SPI_SR_TFIWF | \ + SPI_SR_RFDF | SPI_SR_CMDFFF) + +#define SPI_RSER_TFFFE BIT(25) +#define SPI_RSER_TFFFD BIT(24) +#define SPI_RSER_RFDFE BIT(17) +#define SPI_RSER_RFDFD BIT(16) + +#define SPI_RSER 0x30 +#define SPI_RSER_TCFQE BIT(31) +#define SPI_RSER_EOQFE BIT(28) + +#define SPI_PUSHR 0x34 +#define SPI_PUSHR_CMD_CONT BIT(15) +#define SPI_PUSHR_CMD_CTAS(x) (((x) << 12 & GENMASK(14, 12))) +#define SPI_PUSHR_CMD_EOQ BIT(11) +#define SPI_PUSHR_CMD_CTCNT BIT(10) +#define SPI_PUSHR_CMD_PCS(x) (BIT(x) & GENMASK(5, 0)) + +#define SPI_PUSHR_SLAVE 0x34 + +#define SPI_POPR 0x38 + +#define SPI_TXFR0 0x3c +#define SPI_TXFR1 0x40 +#define SPI_TXFR2 0x44 +#define SPI_TXFR3 0x48 +#define SPI_RXFR0 0x7c +#define SPI_RXFR1 0x80 +#define SPI_RXFR2 0x84 +#define SPI_RXFR3 0x88 + +#define SPI_CTARE(x) (0x11c + (((x) & GENMASK(1, 0)) * 4)) +#define SPI_CTARE_FMSZE(x) (((x) & 0x1) << 16) +#define SPI_CTARE_DTCP(x) ((x) & 0x7ff) + +#define SPI_SREX 0x13c + +#define SPI_FRAME_BITS(bits) SPI_CTAR_FMSZ((bits) - 1) +#define SPI_FRAME_EBITS(bits) SPI_CTARE_FMSZE(((bits) - 1) >> 4) /* Register offsets for regmap_pushr */ -#define PUSHR_CMD 0x0 -#define PUSHR_TX 0x2 +#define PUSHR_CMD 0x0 +#define PUSHR_TX 0x2 -#define SPI_CS_INIT 0x01 -#define SPI_CS_ASSERT 0x02 -#define SPI_CS_DROP 0x04 - -#define DMA_COMPLETION_TIMEOUT msecs_to_jiffies(3000) +#define DMA_COMPLETION_TIMEOUT msecs_to_jiffies(3000) struct chip_data { - u32 ctar_val; - u16 void_write_data; + u32 ctar_val; + u16 void_write_data; }; enum dspi_trans_mode { @@ -141,75 +127,75 @@ enum dspi_trans_mode { }; struct fsl_dspi_devtype_data { - enum dspi_trans_mode trans_mode; - u8 max_clock_factor; - bool xspi_mode; + enum dspi_trans_mode trans_mode; + u8 max_clock_factor; + bool xspi_mode; }; static const struct fsl_dspi_devtype_data vf610_data = { - .trans_mode = DSPI_DMA_MODE, - .max_clock_factor = 2, + .trans_mode = DSPI_DMA_MODE, + .max_clock_factor = 2, }; static const struct fsl_dspi_devtype_data ls1021a_v1_data = { - .trans_mode = DSPI_TCFQ_MODE, - .max_clock_factor = 8, - .xspi_mode = true, + .trans_mode = DSPI_TCFQ_MODE, + .max_clock_factor = 8, + .xspi_mode = true, }; static const struct fsl_dspi_devtype_data ls2085a_data = { - .trans_mode = DSPI_TCFQ_MODE, - .max_clock_factor = 8, + .trans_mode = DSPI_TCFQ_MODE, + .max_clock_factor = 8, }; static const struct fsl_dspi_devtype_data coldfire_data = { - .trans_mode = DSPI_EOQ_MODE, - .max_clock_factor = 8, + .trans_mode = DSPI_EOQ_MODE, + .max_clock_factor = 8, }; struct fsl_dspi_dma { /* Length of transfer in words of DSPI_FIFO_SIZE */ - u32 curr_xfer_len; - - u32 *tx_dma_buf; - struct dma_chan *chan_tx; - dma_addr_t tx_dma_phys; - struct completion cmd_tx_complete; - struct dma_async_tx_descriptor *tx_desc; - - u32 *rx_dma_buf; - struct dma_chan *chan_rx; - dma_addr_t rx_dma_phys; - struct completion cmd_rx_complete; - struct dma_async_tx_descriptor *rx_desc; + u32 curr_xfer_len; + + u32 *tx_dma_buf; + struct dma_chan *chan_tx; + dma_addr_t tx_dma_phys; + struct completion cmd_tx_complete; + struct dma_async_tx_descriptor *tx_desc; + + u32 *rx_dma_buf; + struct dma_chan *chan_rx; + dma_addr_t rx_dma_phys; + struct completion cmd_rx_complete; + struct dma_async_tx_descriptor *rx_desc; }; struct fsl_dspi { - struct spi_master *master; - struct platform_device *pdev; - - struct regmap *regmap; - struct regmap *regmap_pushr; - int irq; - struct clk *clk; - - struct spi_transfer *cur_transfer; - struct spi_message *cur_msg; - struct chip_data *cur_chip; - size_t len; - const void *tx; - void *rx; - void *rx_end; - u16 void_write_data; - u16 tx_cmd; - u8 bits_per_word; - u8 bytes_per_word; - const struct fsl_dspi_devtype_data *devtype_data; - - wait_queue_head_t waitq; - u32 waitflags; - - struct fsl_dspi_dma *dma; + struct spi_controller *ctlr; + struct platform_device *pdev; + + struct regmap *regmap; + struct regmap *regmap_pushr; + int irq; + struct clk *clk; + + struct spi_transfer *cur_transfer; + struct spi_message *cur_msg; + struct chip_data *cur_chip; + size_t len; + const void *tx; + void *rx; + void *rx_end; + u16 void_write_data; + u16 tx_cmd; + u8 bits_per_word; + u8 bytes_per_word; + const struct fsl_dspi_devtype_data *devtype_data; + + wait_queue_head_t waitq; + u32 waitflags; + + struct fsl_dspi_dma *dma; }; static u32 dspi_pop_tx(struct fsl_dspi *dspi) @@ -233,7 +219,7 @@ static u32 dspi_pop_tx_pushr(struct fsl_dspi *dspi) { u16 cmd = dspi->tx_cmd, data = dspi_pop_tx(dspi); - if (spi_controller_is_slave(dspi->master)) + if (spi_controller_is_slave(dspi->ctlr)) return data; if (dspi->len > 0) @@ -246,7 +232,7 @@ static void dspi_push_rx(struct fsl_dspi *dspi, u32 rxdata) if (!dspi->rx) return; - /* Mask of undefined bits */ + /* Mask off undefined bits */ rxdata &= (1 << dspi->bits_per_word) - 1; if (dspi->bytes_per_word == 1) @@ -282,8 +268,8 @@ static void dspi_rx_dma_callback(void *arg) static int dspi_next_xfer_dma_submit(struct fsl_dspi *dspi) { - struct fsl_dspi_dma *dma = dspi->dma; struct device *dev = &dspi->pdev->dev; + struct fsl_dspi_dma *dma = dspi->dma; int time_left; int i; @@ -332,13 +318,13 @@ static int dspi_next_xfer_dma_submit(struct fsl_dspi *dspi) dma_async_issue_pending(dma->chan_rx); dma_async_issue_pending(dma->chan_tx); - if (spi_controller_is_slave(dspi->master)) { + if (spi_controller_is_slave(dspi->ctlr)) { wait_for_completion_interruptible(&dspi->dma->cmd_rx_complete); return 0; } time_left = wait_for_completion_timeout(&dspi->dma->cmd_tx_complete, - DMA_COMPLETION_TIMEOUT); + DMA_COMPLETION_TIMEOUT); if (time_left == 0) { dev_err(dev, "DMA tx timeout\n"); dmaengine_terminate_all(dma->chan_tx); @@ -347,7 +333,7 @@ static int dspi_next_xfer_dma_submit(struct fsl_dspi *dspi) } time_left = wait_for_completion_timeout(&dspi->dma->cmd_rx_complete, - DMA_COMPLETION_TIMEOUT); + DMA_COMPLETION_TIMEOUT); if (time_left == 0) { dev_err(dev, "DMA rx timeout\n"); dmaengine_terminate_all(dma->chan_tx); @@ -360,9 +346,9 @@ static int dspi_next_xfer_dma_submit(struct fsl_dspi *dspi) static int dspi_dma_xfer(struct fsl_dspi *dspi) { - struct fsl_dspi_dma *dma = dspi->dma; - struct device *dev = &dspi->pdev->dev; struct spi_message *message = dspi->cur_msg; + struct device *dev = &dspi->pdev->dev; + struct fsl_dspi_dma *dma = dspi->dma; int curr_remaining_bytes; int bytes_per_buffer; int ret = 0; @@ -397,9 +383,9 @@ exit: static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr) { - struct fsl_dspi_dma *dma; - struct dma_slave_config cfg; struct device *dev = &dspi->pdev->dev; + struct dma_slave_config cfg; + struct fsl_dspi_dma *dma; int ret; dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); @@ -421,14 +407,14 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr) } dma->tx_dma_buf = dma_alloc_coherent(dev, DSPI_DMA_BUFSIZE, - &dma->tx_dma_phys, GFP_KERNEL); + &dma->tx_dma_phys, GFP_KERNEL); if (!dma->tx_dma_buf) { ret = -ENOMEM; goto err_tx_dma_buf; } dma->rx_dma_buf = dma_alloc_coherent(dev, DSPI_DMA_BUFSIZE, - &dma->rx_dma_phys, GFP_KERNEL); + &dma->rx_dma_phys, GFP_KERNEL); if (!dma->rx_dma_buf) { ret = -ENOMEM; goto err_rx_dma_buf; @@ -485,30 +471,31 @@ static void dspi_release_dma(struct fsl_dspi *dspi) struct fsl_dspi_dma *dma = dspi->dma; struct device *dev = &dspi->pdev->dev; - if (dma) { - if (dma->chan_tx) { - dma_unmap_single(dev, dma->tx_dma_phys, - DSPI_DMA_BUFSIZE, DMA_TO_DEVICE); - dma_release_channel(dma->chan_tx); - } + if (!dma) + return; - if (dma->chan_rx) { - dma_unmap_single(dev, dma->rx_dma_phys, - DSPI_DMA_BUFSIZE, DMA_FROM_DEVICE); - dma_release_channel(dma->chan_rx); - } + if (dma->chan_tx) { + dma_unmap_single(dev, dma->tx_dma_phys, + DSPI_DMA_BUFSIZE, DMA_TO_DEVICE); + dma_release_channel(dma->chan_tx); + } + + if (dma->chan_rx) { + dma_unmap_single(dev, dma->rx_dma_phys, + DSPI_DMA_BUFSIZE, DMA_FROM_DEVICE); + dma_release_channel(dma->chan_rx); } } static void hz_to_spi_baud(char *pbr, char *br, int speed_hz, - unsigned long clkrate) + unsigned long clkrate) { /* Valid baud rate pre-scaler values */ int pbr_tbl[4] = {2, 3, 5, 7}; int brs[16] = { 2, 4, 6, 8, - 16, 32, 64, 128, - 256, 512, 1024, 2048, - 4096, 8192, 16384, 32768 }; + 16, 32, 64, 128, + 256, 512, 1024, 2048, + 4096, 8192, 16384, 32768 }; int scale_needed, scale, minscale = INT_MAX; int i, j; @@ -538,15 +525,15 @@ static void hz_to_spi_baud(char *pbr, char *br, int speed_hz, } static void ns_delay_scale(char *psc, char *sc, int delay_ns, - unsigned long clkrate) + unsigned long clkrate) { - int pscale_tbl[4] = {1, 3, 5, 7}; int scale_needed, scale, minscale = INT_MAX; - int i, j; + int pscale_tbl[4] = {1, 3, 5, 7}; u32 remainder; + int i, j; scale_needed = div_u64_rem((u64)delay_ns * clkrate, NSEC_PER_SEC, - &remainder); + &remainder); if (remainder) scale_needed++; @@ -601,7 +588,7 @@ static void dspi_tcfq_write(struct fsl_dspi *dspi) */ u32 data = dspi_pop_tx(dspi); - if (dspi->cur_chip->ctar_val & SPI_CTAR_LSBFE(1)) { + if (dspi->cur_chip->ctar_val & SPI_CTAR_LSBFE) { /* LSB */ tx_fifo_write(dspi, data & 0xFFFF); tx_fifo_write(dspi, data >> 16); @@ -655,19 +642,90 @@ static void dspi_eoq_read(struct fsl_dspi *dspi) { int fifo_size = DSPI_FIFO_SIZE; - /* Read one FIFO entry at and push to rx buffer */ + /* Read one FIFO entry and push to rx buffer */ while ((dspi->rx < dspi->rx_end) && fifo_size--) dspi_push_rx(dspi, fifo_read(dspi)); } -static int dspi_transfer_one_message(struct spi_master *master, - struct spi_message *message) +static int dspi_rxtx(struct fsl_dspi *dspi) +{ + struct spi_message *msg = dspi->cur_msg; + enum dspi_trans_mode trans_mode; + u16 spi_tcnt; + u32 spi_tcr; + + /* Get transfer counter (in number of SPI transfers). It was + * reset to 0 when transfer(s) were started. + */ + regmap_read(dspi->regmap, SPI_TCR, &spi_tcr); + spi_tcnt = SPI_TCR_GET_TCNT(spi_tcr); + /* Update total number of bytes that were transferred */ + msg->actual_length += spi_tcnt * dspi->bytes_per_word; + + trans_mode = dspi->devtype_data->trans_mode; + if (trans_mode == DSPI_EOQ_MODE) + dspi_eoq_read(dspi); + else if (trans_mode == DSPI_TCFQ_MODE) + dspi_tcfq_read(dspi); + + if (!dspi->len) + /* Success! */ + return 0; + + if (trans_mode == DSPI_EOQ_MODE) + dspi_eoq_write(dspi); + else if (trans_mode == DSPI_TCFQ_MODE) + dspi_tcfq_write(dspi); + + return -EINPROGRESS; +} + +static int dspi_poll(struct fsl_dspi *dspi) +{ + int tries = 1000; + u32 spi_sr; + + do { + regmap_read(dspi->regmap, SPI_SR, &spi_sr); + regmap_write(dspi->regmap, SPI_SR, spi_sr); + + if (spi_sr & (SPI_SR_EOQF | SPI_SR_TCFQF)) + break; + } while (--tries); + + if (!tries) + return -ETIMEDOUT; + + return dspi_rxtx(dspi); +} + +static irqreturn_t dspi_interrupt(int irq, void *dev_id) +{ + struct fsl_dspi *dspi = (struct fsl_dspi *)dev_id; + u32 spi_sr; + + regmap_read(dspi->regmap, SPI_SR, &spi_sr); + regmap_write(dspi->regmap, SPI_SR, spi_sr); + + if (!(spi_sr & (SPI_SR_EOQF | SPI_SR_TCFQF))) + return IRQ_NONE; + + if (dspi_rxtx(dspi) == 0) { + dspi->waitflags = 1; + wake_up_interruptible(&dspi->waitq); + } + + return IRQ_HANDLED; +} + +static int dspi_transfer_one_message(struct spi_controller *ctlr, + struct spi_message *message) { - struct fsl_dspi *dspi = spi_master_get_devdata(master); + struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr); struct spi_device *spi = message->spi; + enum dspi_trans_mode trans_mode; struct spi_transfer *transfer; int status = 0; - enum dspi_trans_mode trans_mode; message->actual_length = 0; @@ -677,7 +735,7 @@ static int dspi_transfer_one_message(struct spi_master *master, dspi->cur_chip = spi_get_ctldata(spi); /* Prepare command word for CMD FIFO */ dspi->tx_cmd = SPI_PUSHR_CMD_CTAS(0) | - SPI_PUSHR_CMD_PCS(spi->chip_select); + SPI_PUSHR_CMD_PCS(spi->chip_select); if (list_is_last(&dspi->cur_transfer->transfer_list, &dspi->cur_msg->transfers)) { /* Leave PCS activated after last transfer when @@ -718,8 +776,8 @@ static int dspi_transfer_one_message(struct spi_master *master, SPI_FRAME_BITS(transfer->bits_per_word)); if (dspi->devtype_data->xspi_mode) regmap_write(dspi->regmap, SPI_CTARE(0), - SPI_FRAME_EBITS(transfer->bits_per_word) - | SPI_CTARE_DTCP(1)); + SPI_FRAME_EBITS(transfer->bits_per_word) | + SPI_CTARE_DTCP(1)); trans_mode = dspi->devtype_data->trans_mode; switch (trans_mode) { @@ -733,8 +791,8 @@ static int dspi_transfer_one_message(struct spi_master *master, break; case DSPI_DMA_MODE: regmap_write(dspi->regmap, SPI_RSER, - SPI_RSER_TFFFE | SPI_RSER_TFFFD | - SPI_RSER_RFDFE | SPI_RSER_RFDFD); + SPI_RSER_TFFFE | SPI_RSER_TFFFD | + SPI_RSER_RFDFE | SPI_RSER_RFDFD); status = dspi_dma_xfer(dspi); break; default: @@ -744,13 +802,18 @@ static int dspi_transfer_one_message(struct spi_master *master, goto out; } - if (trans_mode != DSPI_DMA_MODE) { - if (wait_event_interruptible(dspi->waitq, - dspi->waitflags)) - dev_err(&dspi->pdev->dev, - "wait transfer complete fail!\n"); + if (!dspi->irq) { + do { + status = dspi_poll(dspi); + } while (status == -EINPROGRESS); + } else if (trans_mode != DSPI_DMA_MODE) { + status = wait_event_interruptible(dspi->waitq, + dspi->waitflags); dspi->waitflags = 0; } + if (status) + dev_err(&dspi->pdev->dev, + "Waiting for transfer to complete failed!\n"); if (transfer->delay_usecs) udelay(transfer->delay_usecs); @@ -758,19 +821,19 @@ static int dspi_transfer_one_message(struct spi_master *master, out: message->status = status; - spi_finalize_current_message(master); + spi_finalize_current_message(ctlr); return status; } static int dspi_setup(struct spi_device *spi) { - struct chip_data *chip; - struct fsl_dspi *dspi = spi_master_get_devdata(spi->master); - struct fsl_dspi_platform_data *pdata; - u32 cs_sck_delay = 0, sck_cs_delay = 0; + struct fsl_dspi *dspi = spi_controller_get_devdata(spi->controller); unsigned char br = 0, pbr = 0, pcssck = 0, cssck = 0; + u32 cs_sck_delay = 0, sck_cs_delay = 0; + struct fsl_dspi_platform_data *pdata; unsigned char pasc = 0, asc = 0; + struct chip_data *chip; unsigned long clkrate; /* Only alloc on first setup */ @@ -785,10 +848,10 @@ static int dspi_setup(struct spi_device *spi) if (!pdata) { of_property_read_u32(spi->dev.of_node, "fsl,spi-cs-sck-delay", - &cs_sck_delay); + &cs_sck_delay); of_property_read_u32(spi->dev.of_node, "fsl,spi-sck-cs-delay", - &sck_cs_delay); + &sck_cs_delay); } else { cs_sck_delay = pdata->cs_sck_delay; sck_cs_delay = pdata->sck_cs_delay; @@ -805,18 +868,22 @@ static int dspi_setup(struct spi_device *spi) /* Set After SCK delay scale values */ ns_delay_scale(&pasc, &asc, sck_cs_delay, clkrate); - chip->ctar_val = SPI_CTAR_CPOL(spi->mode & SPI_CPOL ? 1 : 0) - | SPI_CTAR_CPHA(spi->mode & SPI_CPHA ? 1 : 0); - - if (!spi_controller_is_slave(dspi->master)) { - chip->ctar_val |= SPI_CTAR_LSBFE(spi->mode & - SPI_LSB_FIRST ? 1 : 0) - | SPI_CTAR_PCSSCK(pcssck) - | SPI_CTAR_CSSCK(cssck) - | SPI_CTAR_PASC(pasc) - | SPI_CTAR_ASC(asc) - | SPI_CTAR_PBR(pbr) - | SPI_CTAR_BR(br); + chip->ctar_val = 0; + if (spi->mode & SPI_CPOL) + chip->ctar_val |= SPI_CTAR_CPOL; + if (spi->mode & SPI_CPHA) + chip->ctar_val |= SPI_CTAR_CPHA; + + if (!spi_controller_is_slave(dspi->ctlr)) { + chip->ctar_val |= SPI_CTAR_PCSSCK(pcssck) | + SPI_CTAR_CSSCK(cssck) | + SPI_CTAR_PASC(pasc) | + SPI_CTAR_ASC(asc) | + SPI_CTAR_PBR(pbr) | + SPI_CTAR_BR(br); + + if (spi->mode & SPI_LSB_FIRST) + chip->ctar_val |= SPI_CTAR_LSBFE; } spi_set_ctldata(spi, chip); @@ -829,70 +896,11 @@ static void dspi_cleanup(struct spi_device *spi) struct chip_data *chip = spi_get_ctldata((struct spi_device *)spi); dev_dbg(&spi->dev, "spi_device %u.%u cleanup\n", - spi->master->bus_num, spi->chip_select); + spi->controller->bus_num, spi->chip_select); kfree(chip); } -static irqreturn_t dspi_interrupt(int irq, void *dev_id) -{ - struct fsl_dspi *dspi = (struct fsl_dspi *)dev_id; - struct spi_message *msg = dspi->cur_msg; - enum dspi_trans_mode trans_mode; - u32 spi_sr, spi_tcr; - u16 spi_tcnt; - - regmap_read(dspi->regmap, SPI_SR, &spi_sr); - regmap_write(dspi->regmap, SPI_SR, spi_sr); - - - if (spi_sr & (SPI_SR_EOQF | SPI_SR_TCFQF)) { - /* Get transfer counter (in number of SPI transfers). It was - * reset to 0 when transfer(s) were started. - */ - regmap_read(dspi->regmap, SPI_TCR, &spi_tcr); - spi_tcnt = SPI_TCR_GET_TCNT(spi_tcr); - /* Update total number of bytes that were transferred */ - msg->actual_length += spi_tcnt * dspi->bytes_per_word; - - trans_mode = dspi->devtype_data->trans_mode; - switch (trans_mode) { - case DSPI_EOQ_MODE: - dspi_eoq_read(dspi); - break; - case DSPI_TCFQ_MODE: - dspi_tcfq_read(dspi); - break; - default: - dev_err(&dspi->pdev->dev, "unsupported trans_mode %u\n", - trans_mode); - return IRQ_HANDLED; - } - - if (!dspi->len) { - dspi->waitflags = 1; - wake_up_interruptible(&dspi->waitq); - } else { - switch (trans_mode) { - case DSPI_EOQ_MODE: - dspi_eoq_write(dspi); - break; - case DSPI_TCFQ_MODE: - dspi_tcfq_write(dspi); - break; - default: - dev_err(&dspi->pdev->dev, - "unsupported trans_mode %u\n", - trans_mode); - } - } - - return IRQ_HANDLED; - } - - return IRQ_NONE; -} - static const struct of_device_id fsl_dspi_dt_ids[] = { { .compatible = "fsl,vf610-dspi", .data = &vf610_data, }, { .compatible = "fsl,ls1021a-v1.0-dspi", .data = &ls1021a_v1_data, }, @@ -904,10 +912,10 @@ MODULE_DEVICE_TABLE(of, fsl_dspi_dt_ids); #ifdef CONFIG_PM_SLEEP static int dspi_suspend(struct device *dev) { - struct spi_master *master = dev_get_drvdata(dev); - struct fsl_dspi *dspi = spi_master_get_devdata(master); + struct spi_controller *ctlr = dev_get_drvdata(dev); + struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr); - spi_master_suspend(master); + spi_controller_suspend(ctlr); clk_disable_unprepare(dspi->clk); pinctrl_pm_select_sleep_state(dev); @@ -917,8 +925,8 @@ static int dspi_suspend(struct device *dev) static int dspi_resume(struct device *dev) { - struct spi_master *master = dev_get_drvdata(dev); - struct fsl_dspi *dspi = spi_master_get_devdata(master); + struct spi_controller *ctlr = dev_get_drvdata(dev); + struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr); int ret; pinctrl_pm_select_default_state(dev); @@ -926,7 +934,7 @@ static int dspi_resume(struct device *dev) ret = clk_prepare_enable(dspi->clk); if (ret) return ret; - spi_master_resume(master); + spi_controller_resume(ctlr); return 0; } @@ -941,16 +949,16 @@ static const struct regmap_range dspi_volatile_ranges[] = { }; static const struct regmap_access_table dspi_volatile_table = { - .yes_ranges = dspi_volatile_ranges, - .n_yes_ranges = ARRAY_SIZE(dspi_volatile_ranges), + .yes_ranges = dspi_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(dspi_volatile_ranges), }; static const struct regmap_config dspi_regmap_config = { - .reg_bits = 32, - .val_bits = 32, - .reg_stride = 4, - .max_register = 0x88, - .volatile_table = &dspi_volatile_table, + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = 0x88, + .volatile_table = &dspi_volatile_table, }; static const struct regmap_range dspi_xspi_volatile_ranges[] = { @@ -961,33 +969,34 @@ static const struct regmap_range dspi_xspi_volatile_ranges[] = { }; static const struct regmap_access_table dspi_xspi_volatile_table = { - .yes_ranges = dspi_xspi_volatile_ranges, - .n_yes_ranges = ARRAY_SIZE(dspi_xspi_volatile_ranges), + .yes_ranges = dspi_xspi_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(dspi_xspi_volatile_ranges), }; static const struct regmap_config dspi_xspi_regmap_config[] = { { - .reg_bits = 32, - .val_bits = 32, - .reg_stride = 4, - .max_register = 0x13c, - .volatile_table = &dspi_xspi_volatile_table, + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = 0x13c, + .volatile_table = &dspi_xspi_volatile_table, }, { - .name = "pushr", - .reg_bits = 16, - .val_bits = 16, - .reg_stride = 2, - .max_register = 0x2, + .name = "pushr", + .reg_bits = 16, + .val_bits = 16, + .reg_stride = 2, + .max_register = 0x2, }, }; static void dspi_init(struct fsl_dspi *dspi) { - unsigned int mcr = SPI_MCR_PCSIS | - (dspi->devtype_data->xspi_mode ? SPI_MCR_XSPI : 0); + unsigned int mcr = SPI_MCR_PCSIS; - if (!spi_controller_is_slave(dspi->master)) + if (dspi->devtype_data->xspi_mode) + mcr |= SPI_MCR_XSPI; + if (!spi_controller_is_slave(dspi->ctlr)) mcr |= SPI_MCR_MASTER; regmap_write(dspi->regmap, SPI_MCR, mcr); @@ -1000,34 +1009,33 @@ static void dspi_init(struct fsl_dspi *dspi) static int dspi_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; - struct spi_master *master; + const struct regmap_config *regmap_config; + struct fsl_dspi_platform_data *pdata; + struct spi_controller *ctlr; + int ret, cs_num, bus_num; struct fsl_dspi *dspi; struct resource *res; - const struct regmap_config *regmap_config; void __iomem *base; - struct fsl_dspi_platform_data *pdata; - int ret = 0, cs_num, bus_num; - master = spi_alloc_master(&pdev->dev, sizeof(struct fsl_dspi)); - if (!master) + ctlr = spi_alloc_master(&pdev->dev, sizeof(struct fsl_dspi)); + if (!ctlr) return -ENOMEM; - dspi = spi_master_get_devdata(master); + dspi = spi_controller_get_devdata(ctlr); dspi->pdev = pdev; - dspi->master = master; + dspi->ctlr = ctlr; - master->transfer = NULL; - master->setup = dspi_setup; - master->transfer_one_message = dspi_transfer_one_message; - master->dev.of_node = pdev->dev.of_node; + ctlr->setup = dspi_setup; + ctlr->transfer_one_message = dspi_transfer_one_message; + ctlr->dev.of_node = pdev->dev.of_node; - master->cleanup = dspi_cleanup; - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST; + ctlr->cleanup = dspi_cleanup; + ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST; pdata = dev_get_platdata(&pdev->dev); if (pdata) { - master->num_chipselect = pdata->cs_num; - master->bus_num = pdata->bus_num; + ctlr->num_chipselect = pdata->cs_num; + ctlr->bus_num = pdata->bus_num; dspi->devtype_data = &coldfire_data; } else { @@ -1035,38 +1043,38 @@ static int dspi_probe(struct platform_device *pdev) ret = of_property_read_u32(np, "spi-num-chipselects", &cs_num); if (ret < 0) { dev_err(&pdev->dev, "can't get spi-num-chipselects\n"); - goto out_master_put; + goto out_ctlr_put; } - master->num_chipselect = cs_num; + ctlr->num_chipselect = cs_num; ret = of_property_read_u32(np, "bus-num", &bus_num); if (ret < 0) { dev_err(&pdev->dev, "can't get bus-num\n"); - goto out_master_put; + goto out_ctlr_put; } - master->bus_num = bus_num; + ctlr->bus_num = bus_num; if (of_property_read_bool(np, "spi-slave")) - master->slave = true; + ctlr->slave = true; dspi->devtype_data = of_device_get_match_data(&pdev->dev); if (!dspi->devtype_data) { dev_err(&pdev->dev, "can't get devtype_data\n"); ret = -EFAULT; - goto out_master_put; + goto out_ctlr_put; } } if (dspi->devtype_data->xspi_mode) - master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32); + ctlr->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32); else - master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16); + ctlr->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) { ret = PTR_ERR(base); - goto out_master_put; + goto out_ctlr_put; } if (dspi->devtype_data->xspi_mode) @@ -1078,7 +1086,7 @@ static int dspi_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to init regmap: %ld\n", PTR_ERR(dspi->regmap)); ret = PTR_ERR(dspi->regmap); - goto out_master_put; + goto out_ctlr_put; } if (dspi->devtype_data->xspi_mode) { @@ -1090,7 +1098,7 @@ static int dspi_probe(struct platform_device *pdev) "failed to init pushr regmap: %ld\n", PTR_ERR(dspi->regmap_pushr)); ret = PTR_ERR(dspi->regmap_pushr); - goto out_master_put; + goto out_ctlr_put; } } @@ -1098,18 +1106,20 @@ static int dspi_probe(struct platform_device *pdev) if (IS_ERR(dspi->clk)) { ret = PTR_ERR(dspi->clk); dev_err(&pdev->dev, "unable to get clock\n"); - goto out_master_put; + goto out_ctlr_put; } ret = clk_prepare_enable(dspi->clk); if (ret) - goto out_master_put; + goto out_ctlr_put; dspi_init(dspi); + dspi->irq = platform_get_irq(pdev, 0); - if (dspi->irq < 0) { - dev_err(&pdev->dev, "can't get platform irq\n"); - ret = dspi->irq; - goto out_clk_put; + if (dspi->irq <= 0) { + dev_info(&pdev->dev, + "can't get platform irq, using poll mode\n"); + dspi->irq = 0; + goto poll_mode; } ret = devm_request_irq(&pdev->dev, dspi->irq, dspi_interrupt, @@ -1119,6 +1129,9 @@ static int dspi_probe(struct platform_device *pdev) goto out_clk_put; } + init_waitqueue_head(&dspi->waitq); + +poll_mode: if (dspi->devtype_data->trans_mode == DSPI_DMA_MODE) { ret = dspi_request_dma(dspi, res->start); if (ret < 0) { @@ -1127,15 +1140,14 @@ static int dspi_probe(struct platform_device *pdev) } } - master->max_speed_hz = + ctlr->max_speed_hz = clk_get_rate(dspi->clk) / dspi->devtype_data->max_clock_factor; - init_waitqueue_head(&dspi->waitq); - platform_set_drvdata(pdev, master); + platform_set_drvdata(pdev, ctlr); - ret = spi_register_master(master); + ret = spi_register_controller(ctlr); if (ret != 0) { - dev_err(&pdev->dev, "Problem registering DSPI master\n"); + dev_err(&pdev->dev, "Problem registering DSPI ctlr\n"); goto out_clk_put; } @@ -1143,32 +1155,32 @@ static int dspi_probe(struct platform_device *pdev) out_clk_put: clk_disable_unprepare(dspi->clk); -out_master_put: - spi_master_put(master); +out_ctlr_put: + spi_controller_put(ctlr); return ret; } static int dspi_remove(struct platform_device *pdev) { - struct spi_master *master = platform_get_drvdata(pdev); - struct fsl_dspi *dspi = spi_master_get_devdata(master); + struct spi_controller *ctlr = platform_get_drvdata(pdev); + struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr); /* Disconnect from the SPI framework */ dspi_release_dma(dspi); clk_disable_unprepare(dspi->clk); - spi_unregister_master(dspi->master); + spi_unregister_controller(dspi->ctlr); return 0; } static struct platform_driver fsl_dspi_driver = { - .driver.name = DRIVER_NAME, - .driver.of_match_table = fsl_dspi_dt_ids, - .driver.owner = THIS_MODULE, - .driver.pm = &dspi_pm, - .probe = dspi_probe, - .remove = dspi_remove, + .driver.name = DRIVER_NAME, + .driver.of_match_table = fsl_dspi_dt_ids, + .driver.owner = THIS_MODULE, + .driver.pm = &dspi_pm, + .probe = dspi_probe, + .remove = dspi_remove, }; module_platform_driver(fsl_dspi_driver); |