| Message ID | 20220221040717.3729-5-leilk.liu@mediatek.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | spi: mediatek: add single/quad mode support | expand |
Il 21/02/22 05:07, Leilk Liu ha scritto: > this patch add the support of spi-mem. > > Signed-off-by: Leilk Liu <leilk.liu@mediatek.com> > --- > drivers/spi/spi-mt65xx.c | 310 ++++++++++++++++++++++++++++++++++++++- > 1 file changed, 309 insertions(+), 1 deletion(-) > > diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c > index 5fa677a589a4..852fc008329a 100644 > --- a/drivers/spi/spi-mt65xx.c > +++ b/drivers/spi/spi-mt65xx.c > @@ -17,6 +17,7 @@ > #include <linux/platform_data/spi-mt65xx.h> > #include <linux/pm_runtime.h> > #include <linux/spi/spi.h> > +#include <linux/spi/spi-mem.h> > #include <linux/dma-mapping.h> > > #define SPI_CFG0_REG 0x0000 > @@ -75,8 +76,21 @@ > #define SPI_CMD_IPM_GET_TICKDLY_OFFSET 22 > > #define SPI_CMD_IPM_GET_TICKDLY_MASK GENMASK(24, 22) > + > +#define PIN_MODE_CFG(x) ((x) / 2) > + > +#define SPI_CFG3_IPM_PIN_MODE_OFFSET 0 > #define SPI_CFG3_IPM_HALF_DUPLEX_DIR BIT(2) > #define SPI_CFG3_IPM_HALF_DUPLEX_EN BIT(3) > +#define SPI_CFG3_IPM_XMODE_EN BIT(4) > +#define SPI_CFG3_IPM_NODATA_FLAG BIT(5) > +#define SPI_CFG3_IPM_CMD_BYTELEN_OFFSET 8 > +#define SPI_CFG3_IPM_ADDR_BYTELEN_OFFSET 12 > + > +#define SPI_CFG3_IPM_CMD_PIN_MODE_MASK GENMASK(1, 0) > +#define SPI_CFG3_IPM_CMD_BYTELEN_MASK GENMASK(11, 8) > +#define SPI_CFG3_IPM_ADDR_BYTELEN_MASK GENMASK(15, 12) > + > #define MT8173_SPI_MAX_PAD_SEL 3 > > #define MTK_SPI_PAUSE_INT_STATUS 0x2 > @@ -87,6 +101,8 @@ > #define MTK_SPI_MAX_FIFO_SIZE 32U > #define MTK_SPI_PACKET_SIZE 1024 > #define MTK_SPI_IPM_PACKET_SIZE SZ_64K > +#define MTK_SPI_IPM_PACKET_LOOP SZ_256 > + > #define MTK_SPI_32BITS_MASK (0xffffffff) > > #define DMA_ADDR_EXT_BITS (36) > @@ -104,7 +120,8 @@ struct mtk_spi_compatible { > bool no_need_unprepare; > /* IPM design improve some single mode features */ > bool ipm_design; > - > + /* IPM design that support quad mode */ > + bool support_quad; > }; > > struct mtk_spi { > @@ -120,6 +137,11 @@ struct mtk_spi { > u32 tx_sgl_len, rx_sgl_len; > const struct mtk_spi_compatible *dev_comp; > u32 spi_clk_hz; > + struct completion spimem_done; > + bool use_spimem; > + struct device *dev; > + dma_addr_t tx_dma; > + dma_addr_t rx_dma; > }; > > static const struct mtk_spi_compatible mtk_common_compat; > @@ -134,6 +156,13 @@ static const struct mtk_spi_compatible ipm_compat_single = { > .ipm_design = true, > }; > > +static const struct mtk_spi_compatible ipm_compat_quad = { > + .enhance_timing = true, > + .dma_ext = true, > + .ipm_design = true, > + .support_quad = true, > +}; > + > static const struct mtk_spi_compatible mt6765_compat = { > .need_pad_sel = true, > .must_tx = true, > @@ -178,6 +207,9 @@ static const struct of_device_id mtk_spi_of_match[] = { > { .compatible = "mediatek,ipm-spi-single", > .data = (void *)&ipm_compat_single, > }, > + { .compatible = "mediatek,ipm-spi-quad", > + .data = (void *)&ipm_compat_quad, > + }, > { .compatible = "mediatek,mt2701-spi", > .data = (void *)&mtk_common_compat, > }, > @@ -694,6 +726,13 @@ static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id) > else > mdata->state = MTK_SPI_IDLE; > > + /* SPI-MEM ops */ > + if (mdata->use_spimem) { > + complete(&mdata->spimem_done); > + > + return IRQ_HANDLED; > + } > + I would instead make a new ISR for the SPI-MEM case... as you're bypassing the entire mtk_spi_interrupt() function like that. Example: static void mtk_spi_check_and_set_state(struct mtk_spi *mdata) { u32 reg_val; reg_val = readl(mdata->base + SPI_STATUS0_REG); if (reg_val & MTK_SPI_PAUSE_INT_STATUS) mdata->state = MTK_SPI_PAUSED; else mdata->state = MTK_SPI_IDLE; } static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id) { u32 cmd, reg_val, cnt, remainder, len; struct spi_master *master = dev_id; struct mtk_spi *mdata = spi_master_get_devdata(master); struct spi_transfer *trans = mdata->cur_transfer; mtk_spi_check_and_set_state(mdata); if (!master->can_dma(........ .... blurb... } static irqreturn_t mtk_spimem_interrupt(int irq, void *dev_id) { struct spi_master *master = dev_id; struct mtk_spi *mdata = spi_master_get_devdata(master); mtk_spi_check_and_set_state(mdata); complete(&mdata->spimem_done); return IRQ_HANDLED; } ... of course, in mtk_spi_probe(), you would do something like if (mdata->use_spimem) ret = devm_request_irq(&pdev->dev, irq, mtk_spimem_interrupt, ...... blah ...... else ret = devm_request_irq(&pdev->dev, irq, mtk_spi_interrupt, ..... blah ...... This way, you're separating the two - increasing human readability and showing the simplifications (in that regard) in the IPM IP's SPI-MEM handling. > if (!master->can_dma(master, NULL, trans)) { > if (trans->rx_buf) { > cnt = mdata->xfer_len / 4; > @@ -777,6 +816,266 @@ static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id) > return IRQ_HANDLED; > } > > +static int mtk_spi_mem_adjust_op_size(struct spi_mem *mem, > + struct spi_mem_op *op) > +{ > + int opcode_len; > + > + if (op->data.dir != SPI_MEM_NO_DATA) { > + opcode_len = 1 + op->addr.nbytes + op->dummy.nbytes; > + if (opcode_len + op->data.nbytes > MTK_SPI_IPM_PACKET_SIZE) { > + op->data.nbytes = MTK_SPI_IPM_PACKET_SIZE - opcode_len; > + /* force data buffer dma-aligned. */ > + op->data.nbytes -= op->data.nbytes % 4; > + } > + } > + > + return 0; > +} > + > +static bool mtk_spi_mem_supports_op(struct spi_mem *mem, > + const struct spi_mem_op *op) > +{ > + if (op->data.buswidth > 4 || op->addr.buswidth > 4 || > + op->dummy.buswidth > 4 || op->cmd.buswidth > 4) > + return false; > + > + if (op->addr.nbytes && op->dummy.nbytes && > + op->addr.buswidth != op->dummy.buswidth) > + return false; > + > + if (op->addr.nbytes + op->dummy.nbytes > 16) > + return false; > + > + if (op->data.nbytes > MTK_SPI_IPM_PACKET_SIZE) { > + if (op->data.nbytes / MTK_SPI_IPM_PACKET_SIZE > > + MTK_SPI_IPM_PACKET_LOOP || > + op->data.nbytes % MTK_SPI_IPM_PACKET_SIZE != 0) > + return false; > + } > + > + return true; > +} > + > +static void mtk_spi_mem_setup_dma_xfer(struct spi_master *master, > + const struct spi_mem_op *op) > +{ > + struct mtk_spi *mdata = spi_master_get_devdata(master); > + > + writel((u32)(mdata->tx_dma & MTK_SPI_32BITS_MASK), > + mdata->base + SPI_TX_SRC_REG); > +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT > + if (mdata->dev_comp->dma_ext) > + writel((u32)(mdata->tx_dma >> 32), > + mdata->base + SPI_TX_SRC_REG_64); > +#endif > + > + if (op->data.dir == SPI_MEM_DATA_IN) { > + writel((u32)(mdata->rx_dma & MTK_SPI_32BITS_MASK), > + mdata->base + SPI_RX_DST_REG); > +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT > + if (mdata->dev_comp->dma_ext) > + writel((u32)(mdata->rx_dma >> 32), > + mdata->base + SPI_RX_DST_REG_64); > +#endif > + } > +} > + > +static int mtk_spi_transfer_wait(struct spi_mem *mem, > + const struct spi_mem_op *op) > +{ > + struct mtk_spi *mdata = spi_master_get_devdata(mem->spi->master); > + unsigned long long ms = 1; Initializing ms to 1 here is useless, as you're anyway reinitializing it right after. I would do it as following: u64 ms = 8000LL; if (op->data.dir == SPI_MEM_NO_DATA) ms *= 32; else ms *= op->data.nbytes; Besides, can you please add a comment to the code explaining why the reason for the waits (why 8, why 1000, why 32)? > + > + if (op->data.dir == SPI_MEM_NO_DATA) > + ms = 8LL * 1000LL * 32; > + else > + ms = 8LL * 1000LL * op->data.nbytes; > + do_div(ms, mem->spi->max_speed_hz); I appreciate the usage of safe division helpers, but this is the wrong one: you have a unsigned long long (64-bits) dividend and a u32 divisor, so the right function to use here is div_u64(). ms = div_u64(ms, mem->spi->max_speed_hz); > + ms += ms + 1000; /* 1s tolerance */ > + > + if (ms > UINT_MAX) > + ms = UINT_MAX; > + > + if (!wait_for_completion_timeout(&mdata->spimem_done, > + msecs_to_jiffies(ms))) { > + dev_err(mdata->dev, "spi-mem transfer timeout\n"); > + return -ETIMEDOUT; > + } > + > + return 0; > +} > + > +static int mtk_spi_mem_exec_op(struct spi_mem *mem, > + const struct spi_mem_op *op) > +{ > + struct mtk_spi *mdata = spi_master_get_devdata(mem->spi->master); > + u32 reg_val, nio = 1, tx_size; > + char *tx_tmp_buf, *rx_tmp_buf; > + int ret = 0; > + > + mdata->use_spimem = true; > + reinit_completion(&mdata->spimem_done); > + > + mtk_spi_reset(mdata); > + mtk_spi_hw_init(mem->spi->master, mem->spi); > + mtk_spi_prepare_transfer(mem->spi->master, mem->spi->max_speed_hz); > + > + reg_val = readl(mdata->base + SPI_CFG3_IPM_REG); > + /* opcode byte len */ > + reg_val &= ~SPI_CFG3_IPM_CMD_BYTELEN_MASK; > + reg_val |= 1 << SPI_CFG3_IPM_CMD_BYTELEN_OFFSET; > + > + /* addr & dummy byte len */ > + reg_val &= ~SPI_CFG3_IPM_ADDR_BYTELEN_MASK; > + if (op->addr.nbytes || op->dummy.nbytes) > + reg_val |= (op->addr.nbytes + op->dummy.nbytes) << > + SPI_CFG3_IPM_ADDR_BYTELEN_OFFSET; > + > + /* data byte len */ > + if (op->data.dir == SPI_MEM_NO_DATA) { > + reg_val |= SPI_CFG3_IPM_NODATA_FLAG; > + writel(0, mdata->base + SPI_CFG1_REG); > + } else { > + reg_val &= ~SPI_CFG3_IPM_NODATA_FLAG; > + mdata->xfer_len = op->data.nbytes; > + mtk_spi_setup_packet(mem->spi->master); > + } > + > + if (op->addr.nbytes || op->dummy.nbytes) { > + if (op->addr.buswidth == 1 || op->dummy.buswidth == 1) > + reg_val |= SPI_CFG3_IPM_XMODE_EN; > + else > + reg_val &= ~SPI_CFG3_IPM_XMODE_EN; > + } > + > + if (op->addr.buswidth == 2 || > + op->dummy.buswidth == 2 || > + op->data.buswidth == 2) > + nio = 2; > + else if (op->addr.buswidth == 4 || > + op->dummy.buswidth == 4 || > + op->data.buswidth == 4) > + nio = 4; else nio = 1; ...so that you can avoid double initialization of the `nio` variable. > + > + reg_val &= ~SPI_CFG3_IPM_CMD_PIN_MODE_MASK; > + reg_val |= PIN_MODE_CFG(nio) << SPI_CFG3_IPM_PIN_MODE_OFFSET; > + Regards, Angelo
On Tue, 2022-02-22 at 11:49 +0100, AngeloGioacchino Del Regno wrote: > Il 21/02/22 05:07, Leilk Liu ha scritto: > > this patch add the support of spi-mem. > > > > Signed-off-by: Leilk Liu <leilk.liu@mediatek.com> > > --- > > drivers/spi/spi-mt65xx.c | 310 > > ++++++++++++++++++++++++++++++++++++++- > > 1 file changed, 309 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c > > index 5fa677a589a4..852fc008329a 100644 > > --- a/drivers/spi/spi-mt65xx.c > > +++ b/drivers/spi/spi-mt65xx.c > > @@ -17,6 +17,7 @@ > > #include <linux/platform_data/spi-mt65xx.h> > > #include <linux/pm_runtime.h> > > #include <linux/spi/spi.h> > > +#include <linux/spi/spi-mem.h> > > #include <linux/dma-mapping.h> > > > > #define SPI_CFG0_REG 0x0000 > > @@ -75,8 +76,21 @@ > > #define SPI_CMD_IPM_GET_TICKDLY_OFFSET 22 > > > > #define SPI_CMD_IPM_GET_TICKDLY_MASK GENMASK(24, 22) > > + > > +#define PIN_MODE_CFG(x) ((x) / 2) > > + > > +#define SPI_CFG3_IPM_PIN_MODE_OFFSET 0 > > #define SPI_CFG3_IPM_HALF_DUPLEX_DIR BIT(2) > > #define SPI_CFG3_IPM_HALF_DUPLEX_EN BIT(3) > > +#define SPI_CFG3_IPM_XMODE_EN BIT(4) > > +#define SPI_CFG3_IPM_NODATA_FLAG BIT(5) > > +#define SPI_CFG3_IPM_CMD_BYTELEN_OFFSET 8 > > +#define SPI_CFG3_IPM_ADDR_BYTELEN_OFFSET 12 > > + > > +#define SPI_CFG3_IPM_CMD_PIN_MODE_MASK GENMASK(1, 0) > > +#define SPI_CFG3_IPM_CMD_BYTELEN_MASK GENMASK(11, 8) > > +#define SPI_CFG3_IPM_ADDR_BYTELEN_MASK GENMASK(15, 12) > > + > > #define MT8173_SPI_MAX_PAD_SEL 3 > > > > #define MTK_SPI_PAUSE_INT_STATUS 0x2 > > @@ -87,6 +101,8 @@ > > #define MTK_SPI_MAX_FIFO_SIZE 32U > > #define MTK_SPI_PACKET_SIZE 1024 > > #define MTK_SPI_IPM_PACKET_SIZE SZ_64K > > +#define MTK_SPI_IPM_PACKET_LOOP SZ_256 > > + > > #define MTK_SPI_32BITS_MASK (0xffffffff) > > > > #define DMA_ADDR_EXT_BITS (36) > > @@ -104,7 +120,8 @@ struct mtk_spi_compatible { > > bool no_need_unprepare; > > /* IPM design improve some single mode features */ > > bool ipm_design; > > - > > + /* IPM design that support quad mode */ > > + bool support_quad; > > }; > > > > struct mtk_spi { > > @@ -120,6 +137,11 @@ struct mtk_spi { > > u32 tx_sgl_len, rx_sgl_len; > > const struct mtk_spi_compatible *dev_comp; > > u32 spi_clk_hz; > > + struct completion spimem_done; > > + bool use_spimem; > > + struct device *dev; > > + dma_addr_t tx_dma; > > + dma_addr_t rx_dma; > > }; > > > > static const struct mtk_spi_compatible mtk_common_compat; > > @@ -134,6 +156,13 @@ static const struct mtk_spi_compatible > > ipm_compat_single = { > > .ipm_design = true, > > }; > > > > +static const struct mtk_spi_compatible ipm_compat_quad = { > > + .enhance_timing = true, > > + .dma_ext = true, > > + .ipm_design = true, > > + .support_quad = true, > > +}; > > + > > static const struct mtk_spi_compatible mt6765_compat = { > > .need_pad_sel = true, > > .must_tx = true, > > @@ -178,6 +207,9 @@ static const struct of_device_id > > mtk_spi_of_match[] = { > > { .compatible = "mediatek,ipm-spi-single", > > .data = (void *)&ipm_compat_single, > > }, > > + { .compatible = "mediatek,ipm-spi-quad", > > + .data = (void *)&ipm_compat_quad, > > + }, > > { .compatible = "mediatek,mt2701-spi", > > .data = (void *)&mtk_common_compat, > > }, > > @@ -694,6 +726,13 @@ static irqreturn_t mtk_spi_interrupt(int irq, > > void *dev_id) > > else > > mdata->state = MTK_SPI_IDLE; > > > > + /* SPI-MEM ops */ > > + if (mdata->use_spimem) { > > + complete(&mdata->spimem_done); > > + > > + return IRQ_HANDLED; > > + } > > + > > I would instead make a new ISR for the SPI-MEM case... as you're > bypassing the > entire mtk_spi_interrupt() function like that. > > Example: > > static void mtk_spi_check_and_set_state(struct mtk_spi *mdata) > { > u32 reg_val; > > reg_val = readl(mdata->base + SPI_STATUS0_REG); > > if (reg_val & MTK_SPI_PAUSE_INT_STATUS) > > mdata->state = MTK_SPI_PAUSED; > > else > > mdata->state = MTK_SPI_IDLE; > } > > static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id) > > { > u32 cmd, reg_val, cnt, remainder, len; > > struct spi_master *master = dev_id; > > struct mtk_spi *mdata = spi_master_get_devdata(master); > > struct spi_transfer *trans = mdata->cur_transfer; > > mtk_spi_check_and_set_state(mdata); > > if (!master->can_dma(........ > .... blurb... > } > > static irqreturn_t mtk_spimem_interrupt(int irq, void *dev_id) > { > struct spi_master *master = dev_id; > > struct mtk_spi *mdata = spi_master_get_devdata(master); > > mtk_spi_check_and_set_state(mdata); > complete(&mdata->spimem_done); > > return IRQ_HANDLED; > } > > ... of course, in mtk_spi_probe(), you would do something like > > if (mdata->use_spimem) > ret = devm_request_irq(&pdev->dev, irq, mtk_spimem_interrupt, > ...... blah ...... > else > ret = devm_request_irq(&pdev->dev, irq, mtk_spi_interrupt, > ..... blah ...... > > This way, you're separating the two - increasing human readability > and showing > the simplifications (in that regard) in the IPM IP's SPI-MEM > handling. > thanks for your advise, I'll do it in the next version. > > if (!master->can_dma(master, NULL, trans)) { > > if (trans->rx_buf) { > > cnt = mdata->xfer_len / 4; > > @@ -777,6 +816,266 @@ static irqreturn_t mtk_spi_interrupt(int irq, > > void *dev_id) > > return IRQ_HANDLED; > > } > > > > +static int mtk_spi_mem_adjust_op_size(struct spi_mem *mem, > > + struct spi_mem_op *op) > > +{ > > + int opcode_len; > > + > > + if (op->data.dir != SPI_MEM_NO_DATA) { > > + opcode_len = 1 + op->addr.nbytes + op->dummy.nbytes; > > + if (opcode_len + op->data.nbytes > > > MTK_SPI_IPM_PACKET_SIZE) { > > + op->data.nbytes = MTK_SPI_IPM_PACKET_SIZE - > > opcode_len; > > + /* force data buffer dma-aligned. */ > > + op->data.nbytes -= op->data.nbytes % 4; > > + } > > + } > > + > > + return 0; > > +} > > + > > +static bool mtk_spi_mem_supports_op(struct spi_mem *mem, > > + const struct spi_mem_op *op) > > +{ > > + if (op->data.buswidth > 4 || op->addr.buswidth > 4 || > > + op->dummy.buswidth > 4 || op->cmd.buswidth > 4) > > + return false; > > + > > + if (op->addr.nbytes && op->dummy.nbytes && > > + op->addr.buswidth != op->dummy.buswidth) > > + return false; > > + > > + if (op->addr.nbytes + op->dummy.nbytes > 16) > > + return false; > > + > > + if (op->data.nbytes > MTK_SPI_IPM_PACKET_SIZE) { > > + if (op->data.nbytes / MTK_SPI_IPM_PACKET_SIZE > > > + MTK_SPI_IPM_PACKET_LOOP || > > + op->data.nbytes % MTK_SPI_IPM_PACKET_SIZE != 0) > > + return false; > > + } > > + > > + return true; > > +} > > + > > +static void mtk_spi_mem_setup_dma_xfer(struct spi_master *master, > > + const struct spi_mem_op *op) > > +{ > > + struct mtk_spi *mdata = spi_master_get_devdata(master); > > + > > + writel((u32)(mdata->tx_dma & MTK_SPI_32BITS_MASK), > > + mdata->base + SPI_TX_SRC_REG); > > +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT > > + if (mdata->dev_comp->dma_ext) > > + writel((u32)(mdata->tx_dma >> 32), > > + mdata->base + SPI_TX_SRC_REG_64); > > +#endif > > + > > + if (op->data.dir == SPI_MEM_DATA_IN) { > > + writel((u32)(mdata->rx_dma & MTK_SPI_32BITS_MASK), > > + mdata->base + SPI_RX_DST_REG); > > +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT > > + if (mdata->dev_comp->dma_ext) > > + writel((u32)(mdata->rx_dma >> 32), > > + mdata->base + SPI_RX_DST_REG_64); > > +#endif > > + } > > +} > > + > > +static int mtk_spi_transfer_wait(struct spi_mem *mem, > > + const struct spi_mem_op *op) > > +{ > > + struct mtk_spi *mdata = spi_master_get_devdata(mem->spi- > > >master); > > + unsigned long long ms = 1; > > Initializing ms to 1 here is useless, as you're anyway reinitializing > it > right after. I would do it as following: > > u64 ms = 8000LL; > > if (op->data.dir == SPI_MEM_NO_DATA) > ms *= 32; > else > ms *= op->data.nbytes; > OK,I'll fix it. > Besides, can you please add a comment to the code explaining why the > reason for the waits (why 8, why 1000, why 32)? > OK,THANKS > > + > > + if (op->data.dir == SPI_MEM_NO_DATA) > > + ms = 8LL * 1000LL * 32; > > + else > > + ms = 8LL * 1000LL * op->data.nbytes; > > + do_div(ms, mem->spi->max_speed_hz); > > I appreciate the usage of safe division helpers, but this is the > wrong one: > you have a unsigned long long (64-bits) dividend and a u32 divisor, > so the > right function to use here is div_u64(). > OK, I'll fix it. thanks! > ms = div_u64(ms, mem->spi->max_speed_hz); > > > + ms += ms + 1000; /* 1s tolerance */ > > + > > + if (ms > UINT_MAX) > > + ms = UINT_MAX; > > + > > + if (!wait_for_completion_timeout(&mdata->spimem_done, > > + msecs_to_jiffies(ms))) { > > + dev_err(mdata->dev, "spi-mem transfer timeout\n"); > > + return -ETIMEDOUT; > > + } > > + > > + return 0; > > +} > > + > > +static int mtk_spi_mem_exec_op(struct spi_mem *mem, > > + const struct spi_mem_op *op) > > +{ > > + struct mtk_spi *mdata = spi_master_get_devdata(mem->spi- > > >master); > > + u32 reg_val, nio = 1, tx_size; > > + char *tx_tmp_buf, *rx_tmp_buf; > > + int ret = 0; > > + > > + mdata->use_spimem = true; > > + reinit_completion(&mdata->spimem_done); > > + > > + mtk_spi_reset(mdata); > > + mtk_spi_hw_init(mem->spi->master, mem->spi); > > + mtk_spi_prepare_transfer(mem->spi->master, mem->spi- > > >max_speed_hz); > > + > > + reg_val = readl(mdata->base + SPI_CFG3_IPM_REG); > > + /* opcode byte len */ > > + reg_val &= ~SPI_CFG3_IPM_CMD_BYTELEN_MASK; > > + reg_val |= 1 << SPI_CFG3_IPM_CMD_BYTELEN_OFFSET; > > + > > + /* addr & dummy byte len */ > > + reg_val &= ~SPI_CFG3_IPM_ADDR_BYTELEN_MASK; > > + if (op->addr.nbytes || op->dummy.nbytes) > > + reg_val |= (op->addr.nbytes + op->dummy.nbytes) << > > + SPI_CFG3_IPM_ADDR_BYTELEN_OFFSET; > > + > > + /* data byte len */ > > + if (op->data.dir == SPI_MEM_NO_DATA) { > > + reg_val |= SPI_CFG3_IPM_NODATA_FLAG; > > + writel(0, mdata->base + SPI_CFG1_REG); > > + } else { > > + reg_val &= ~SPI_CFG3_IPM_NODATA_FLAG; > > + mdata->xfer_len = op->data.nbytes; > > + mtk_spi_setup_packet(mem->spi->master); > > + } > > + > > + if (op->addr.nbytes || op->dummy.nbytes) { > > + if (op->addr.buswidth == 1 || op->dummy.buswidth == 1) > > + reg_val |= SPI_CFG3_IPM_XMODE_EN; > > + else > > + reg_val &= ~SPI_CFG3_IPM_XMODE_EN; > > + } > > + > > + if (op->addr.buswidth == 2 || > > + op->dummy.buswidth == 2 || > > + op->data.buswidth == 2) > > + nio = 2; > > + else if (op->addr.buswidth == 4 || > > + op->dummy.buswidth == 4 || > > + op->data.buswidth == 4) > > + nio = 4; > > else > nio = 1; > > ...so that you can avoid double initialization of the `nio` variable. > OK, I'll fix it,thanks > > + > > + reg_val &= ~SPI_CFG3_IPM_CMD_PIN_MODE_MASK; > > + reg_val |= PIN_MODE_CFG(nio) << SPI_CFG3_IPM_PIN_MODE_OFFSET; > > + > > Regards, > Angelo
On Wed, 2022-02-23 at 09:59 +0800, Leilk Liu wrote: > On Tue, 2022-02-22 at 11:49 +0100, AngeloGioacchino Del Regno wrote: > > Il 21/02/22 05:07, Leilk Liu ha scritto: > > > this patch add the support of spi-mem. > > > > > > Signed-off-by: Leilk Liu <leilk.liu@mediatek.com> > > > --- > > > drivers/spi/spi-mt65xx.c | 310 > > > ++++++++++++++++++++++++++++++++++++++- > > > 1 file changed, 309 insertions(+), 1 deletion(-) > > > > > > diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c > > > index 5fa677a589a4..852fc008329a 100644 > > > --- a/drivers/spi/spi-mt65xx.c > > > +++ b/drivers/spi/spi-mt65xx.c > > > @@ -17,6 +17,7 @@ > > > #include <linux/platform_data/spi-mt65xx.h> > > > #include <linux/pm_runtime.h> > > > #include <linux/spi/spi.h> > > > +#include <linux/spi/spi-mem.h> > > > #include <linux/dma-mapping.h> > > > > > > #define SPI_CFG0_REG 0x0000 > > > @@ -75,8 +76,21 @@ > > > #define SPI_CMD_IPM_GET_TICKDLY_OFFSET 22 > > > > > > #define SPI_CMD_IPM_GET_TICKDLY_MASK GENMASK(24, 22) > > > + > > > +#define PIN_MODE_CFG(x) ((x) / 2) > > > + > > > +#define SPI_CFG3_IPM_PIN_MODE_OFFSET 0 > > > #define SPI_CFG3_IPM_HALF_DUPLEX_DIR BIT(2) > > > #define SPI_CFG3_IPM_HALF_DUPLEX_EN BIT(3) > > > +#define SPI_CFG3_IPM_XMODE_EN BIT(4) > > > +#define SPI_CFG3_IPM_NODATA_FLAG BIT(5) > > > +#define SPI_CFG3_IPM_CMD_BYTELEN_OFFSET 8 > > > +#define SPI_CFG3_IPM_ADDR_BYTELEN_OFFSET 12 > > > + > > > +#define SPI_CFG3_IPM_CMD_PIN_MODE_MASK GENMASK(1, 0) > > > +#define SPI_CFG3_IPM_CMD_BYTELEN_MASK GENMASK(11, 8) > > > +#define SPI_CFG3_IPM_ADDR_BYTELEN_MASK GENMASK(15, 12) > > > + > > > #define MT8173_SPI_MAX_PAD_SEL 3 > > > > > > #define MTK_SPI_PAUSE_INT_STATUS 0x2 > > > @@ -87,6 +101,8 @@ > > > #define MTK_SPI_MAX_FIFO_SIZE 32U > > > #define MTK_SPI_PACKET_SIZE 1024 > > > #define MTK_SPI_IPM_PACKET_SIZE SZ_64K > > > +#define MTK_SPI_IPM_PACKET_LOOP SZ_256 > > > + > > > #define MTK_SPI_32BITS_MASK (0xffffffff) > > > > > > #define DMA_ADDR_EXT_BITS (36) > > > @@ -104,7 +120,8 @@ struct mtk_spi_compatible { > > > bool no_need_unprepare; > > > /* IPM design improve some single mode features */ > > > bool ipm_design; > > > - > > > + /* IPM design that support quad mode */ > > > + bool support_quad; > > > }; > > > > > > struct mtk_spi { > > > @@ -120,6 +137,11 @@ struct mtk_spi { > > > u32 tx_sgl_len, rx_sgl_len; > > > const struct mtk_spi_compatible *dev_comp; > > > u32 spi_clk_hz; > > > + struct completion spimem_done; > > > + bool use_spimem; > > > + struct device *dev; > > > + dma_addr_t tx_dma; > > > + dma_addr_t rx_dma; > > > }; > > > > > > static const struct mtk_spi_compatible mtk_common_compat; > > > @@ -134,6 +156,13 @@ static const struct mtk_spi_compatible > > > ipm_compat_single = { > > > .ipm_design = true, > > > }; > > > > > > +static const struct mtk_spi_compatible ipm_compat_quad = { > > > + .enhance_timing = true, > > > + .dma_ext = true, > > > + .ipm_design = true, > > > + .support_quad = true, > > > +}; > > > + > > > static const struct mtk_spi_compatible mt6765_compat = { > > > .need_pad_sel = true, > > > .must_tx = true, > > > @@ -178,6 +207,9 @@ static const struct of_device_id > > > mtk_spi_of_match[] = { > > > { .compatible = "mediatek,ipm-spi-single", > > > .data = (void *)&ipm_compat_single, > > > }, > > > + { .compatible = "mediatek,ipm-spi-quad", > > > + .data = (void *)&ipm_compat_quad, > > > + }, > > > { .compatible = "mediatek,mt2701-spi", > > > .data = (void *)&mtk_common_compat, > > > }, > > > @@ -694,6 +726,13 @@ static irqreturn_t mtk_spi_interrupt(int > > > irq, > > > void *dev_id) > > > else > > > mdata->state = MTK_SPI_IDLE; > > > > > > + /* SPI-MEM ops */ > > > + if (mdata->use_spimem) { > > > + complete(&mdata->spimem_done); > > > + > > > + return IRQ_HANDLED; > > > + } > > > + > > > > I would instead make a new ISR for the SPI-MEM case... as you're > > bypassing the > > entire mtk_spi_interrupt() function like that. > > > > Example: > > > > static void mtk_spi_check_and_set_state(struct mtk_spi *mdata) > > { > > u32 reg_val; > > > > reg_val = readl(mdata->base + SPI_STATUS0_REG); > > > > if (reg_val & MTK_SPI_PAUSE_INT_STATUS) > > > > mdata->state = MTK_SPI_PAUSED; > > > > else > > > > mdata->state = MTK_SPI_IDLE; > > } > > > > static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id) > > > > { > > u32 cmd, reg_val, cnt, remainder, len; > > > > struct spi_master *master = dev_id; > > > > struct mtk_spi *mdata = spi_master_get_devdata(master); > > > > struct spi_transfer *trans = mdata->cur_transfer; > > > > mtk_spi_check_and_set_state(mdata); > > > > if (!master->can_dma(........ > > .... blurb... > > } > > > > static irqreturn_t mtk_spimem_interrupt(int irq, void *dev_id) > > { > > struct spi_master *master = dev_id; > > > > struct mtk_spi *mdata = spi_master_get_devdata(master); > > > > mtk_spi_check_and_set_state(mdata); > > complete(&mdata->spimem_done); > > > > return IRQ_HANDLED; > > } > > > > ... of course, in mtk_spi_probe(), you would do something like > > > > if (mdata->use_spimem) > > ret = devm_request_irq(&pdev->dev, irq, mtk_spimem_interrupt, > > ...... blah ...... > > else > > ret = devm_request_irq(&pdev->dev, irq, mtk_spi_interrupt, > > ..... blah ...... > > > > This way, you're separating the two - increasing human readability > > and showing > > the simplifications (in that regard) in the IPM IP's SPI-MEM > > handling. > > > > thanks for your advise, I'll do it in the next version. Hi AngeloGioacchino, It can't request mtk_spimem_interrupt() only while support spimem core, since spi driver should support spi_sync and spi_mem_exec_op both. > > > > if (!master->can_dma(master, NULL, trans)) { > > > if (trans->rx_buf) { > > > cnt = mdata->xfer_len / 4; > > > @@ -777,6 +816,266 @@ static irqreturn_t mtk_spi_interrupt(int > > > irq, > > > void *dev_id) > > > return IRQ_HANDLED; > > > } > > > > > > +static int mtk_spi_mem_adjust_op_size(struct spi_mem *mem, > > > + struct spi_mem_op *op) > > > +{ > > > + int opcode_len; > > > + > > > + if (op->data.dir != SPI_MEM_NO_DATA) { > > > + opcode_len = 1 + op->addr.nbytes + op->dummy.nbytes; > > > + if (opcode_len + op->data.nbytes > > > > MTK_SPI_IPM_PACKET_SIZE) { > > > + op->data.nbytes = MTK_SPI_IPM_PACKET_SIZE - > > > opcode_len; > > > + /* force data buffer dma-aligned. */ > > > + op->data.nbytes -= op->data.nbytes % 4; > > > + } > > > + } > > > + > > > + return 0; > > > +} > > > + > > > +static bool mtk_spi_mem_supports_op(struct spi_mem *mem, > > > + const struct spi_mem_op *op) > > > +{ > > > + if (op->data.buswidth > 4 || op->addr.buswidth > 4 || > > > + op->dummy.buswidth > 4 || op->cmd.buswidth > 4) > > > + return false; > > > + > > > + if (op->addr.nbytes && op->dummy.nbytes && > > > + op->addr.buswidth != op->dummy.buswidth) > > > + return false; > > > + > > > + if (op->addr.nbytes + op->dummy.nbytes > 16) > > > + return false; > > > + > > > + if (op->data.nbytes > MTK_SPI_IPM_PACKET_SIZE) { > > > + if (op->data.nbytes / MTK_SPI_IPM_PACKET_SIZE > > > > + MTK_SPI_IPM_PACKET_LOOP || > > > + op->data.nbytes % MTK_SPI_IPM_PACKET_SIZE != 0) > > > + return false; > > > + } > > > + > > > + return true; > > > +} > > > + > > > +static void mtk_spi_mem_setup_dma_xfer(struct spi_master > > > *master, > > > + const struct spi_mem_op *op) > > > +{ > > > + struct mtk_spi *mdata = spi_master_get_devdata(master); > > > + > > > + writel((u32)(mdata->tx_dma & MTK_SPI_32BITS_MASK), > > > + mdata->base + SPI_TX_SRC_REG); > > > +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT > > > + if (mdata->dev_comp->dma_ext) > > > + writel((u32)(mdata->tx_dma >> 32), > > > + mdata->base + SPI_TX_SRC_REG_64); > > > +#endif > > > + > > > + if (op->data.dir == SPI_MEM_DATA_IN) { > > > + writel((u32)(mdata->rx_dma & MTK_SPI_32BITS_MASK), > > > + mdata->base + SPI_RX_DST_REG); > > > +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT > > > + if (mdata->dev_comp->dma_ext) > > > + writel((u32)(mdata->rx_dma >> 32), > > > + mdata->base + SPI_RX_DST_REG_64); > > > +#endif > > > + } > > > +} > > > + > > > +static int mtk_spi_transfer_wait(struct spi_mem *mem, > > > + const struct spi_mem_op *op) > > > +{ > > > + struct mtk_spi *mdata = spi_master_get_devdata(mem->spi- > > > > master); > > > > > > + unsigned long long ms = 1; > > > > Initializing ms to 1 here is useless, as you're anyway > > reinitializing > > it > > right after. I would do it as following: > > > > u64 ms = 8000LL; > > > > if (op->data.dir == SPI_MEM_NO_DATA) > > ms *= 32; > > else > > ms *= op->data.nbytes; > > > > OK,I'll fix it. > > > Besides, can you please add a comment to the code explaining why > > the > > reason for the waits (why 8, why 1000, why 32)? > > > > OK,THANKS > > > > + > > > + if (op->data.dir == SPI_MEM_NO_DATA) > > > + ms = 8LL * 1000LL * 32; > > > + else > > > + ms = 8LL * 1000LL * op->data.nbytes; > > > + do_div(ms, mem->spi->max_speed_hz); > > > > I appreciate the usage of safe division helpers, but this is the > > wrong one: > > you have a unsigned long long (64-bits) dividend and a u32 divisor, > > so the > > right function to use here is div_u64(). > > > > OK, I'll fix it. thanks! > > > ms = div_u64(ms, mem->spi->max_speed_hz); > > > > > + ms += ms + 1000; /* 1s tolerance */ > > > + > > > + if (ms > UINT_MAX) > > > + ms = UINT_MAX; > > > + > > > + if (!wait_for_completion_timeout(&mdata->spimem_done, > > > + msecs_to_jiffies(ms))) { > > > + dev_err(mdata->dev, "spi-mem transfer timeout\n"); > > > + return -ETIMEDOUT; > > > + } > > > + > > > + return 0; > > > +} > > > + > > > +static int mtk_spi_mem_exec_op(struct spi_mem *mem, > > > + const struct spi_mem_op *op) > > > +{ > > > + struct mtk_spi *mdata = spi_master_get_devdata(mem->spi- > > > > master); > > > > > > + u32 reg_val, nio = 1, tx_size; > > > + char *tx_tmp_buf, *rx_tmp_buf; > > > + int ret = 0; > > > + > > > + mdata->use_spimem = true; > > > + reinit_completion(&mdata->spimem_done); > > > + > > > + mtk_spi_reset(mdata); > > > + mtk_spi_hw_init(mem->spi->master, mem->spi); > > > + mtk_spi_prepare_transfer(mem->spi->master, mem->spi- > > > > max_speed_hz); > > > > > > + > > > + reg_val = readl(mdata->base + SPI_CFG3_IPM_REG); > > > + /* opcode byte len */ > > > + reg_val &= ~SPI_CFG3_IPM_CMD_BYTELEN_MASK; > > > + reg_val |= 1 << SPI_CFG3_IPM_CMD_BYTELEN_OFFSET; > > > + > > > + /* addr & dummy byte len */ > > > + reg_val &= ~SPI_CFG3_IPM_ADDR_BYTELEN_MASK; > > > + if (op->addr.nbytes || op->dummy.nbytes) > > > + reg_val |= (op->addr.nbytes + op->dummy.nbytes) << > > > + SPI_CFG3_IPM_ADDR_BYTELEN_OFFSET; > > > + > > > + /* data byte len */ > > > + if (op->data.dir == SPI_MEM_NO_DATA) { > > > + reg_val |= SPI_CFG3_IPM_NODATA_FLAG; > > > + writel(0, mdata->base + SPI_CFG1_REG); > > > + } else { > > > + reg_val &= ~SPI_CFG3_IPM_NODATA_FLAG; > > > + mdata->xfer_len = op->data.nbytes; > > > + mtk_spi_setup_packet(mem->spi->master); > > > + } > > > + > > > + if (op->addr.nbytes || op->dummy.nbytes) { > > > + if (op->addr.buswidth == 1 || op->dummy.buswidth == 1) > > > + reg_val |= SPI_CFG3_IPM_XMODE_EN; > > > + else > > > + reg_val &= ~SPI_CFG3_IPM_XMODE_EN; > > > + } > > > + > > > + if (op->addr.buswidth == 2 || > > > + op->dummy.buswidth == 2 || > > > + op->data.buswidth == 2) > > > + nio = 2; > > > + else if (op->addr.buswidth == 4 || > > > + op->dummy.buswidth == 4 || > > > + op->data.buswidth == 4) > > > + nio = 4; > > > > else > > nio = 1; > > > > ...so that you can avoid double initialization of the `nio` > > variable. > > > > OK, I'll fix it,thanks > > > > + > > > + reg_val &= ~SPI_CFG3_IPM_CMD_PIN_MODE_MASK; > > > + reg_val |= PIN_MODE_CFG(nio) << SPI_CFG3_IPM_PIN_MODE_OFFSET; > > > + > > > > Regards, > > Angelo > > _______________________________________________ > Linux-mediatek mailing list > Linux-mediatek@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-mediatek
diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c index 5fa677a589a4..852fc008329a 100644 --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -17,6 +17,7 @@ #include <linux/platform_data/spi-mt65xx.h> #include <linux/pm_runtime.h> #include <linux/spi/spi.h> +#include <linux/spi/spi-mem.h> #include <linux/dma-mapping.h> #define SPI_CFG0_REG 0x0000 @@ -75,8 +76,21 @@ #define SPI_CMD_IPM_GET_TICKDLY_OFFSET 22 #define SPI_CMD_IPM_GET_TICKDLY_MASK GENMASK(24, 22) + +#define PIN_MODE_CFG(x) ((x) / 2) + +#define SPI_CFG3_IPM_PIN_MODE_OFFSET 0 #define SPI_CFG3_IPM_HALF_DUPLEX_DIR BIT(2) #define SPI_CFG3_IPM_HALF_DUPLEX_EN BIT(3) +#define SPI_CFG3_IPM_XMODE_EN BIT(4) +#define SPI_CFG3_IPM_NODATA_FLAG BIT(5) +#define SPI_CFG3_IPM_CMD_BYTELEN_OFFSET 8 +#define SPI_CFG3_IPM_ADDR_BYTELEN_OFFSET 12 + +#define SPI_CFG3_IPM_CMD_PIN_MODE_MASK GENMASK(1, 0) +#define SPI_CFG3_IPM_CMD_BYTELEN_MASK GENMASK(11, 8) +#define SPI_CFG3_IPM_ADDR_BYTELEN_MASK GENMASK(15, 12) + #define MT8173_SPI_MAX_PAD_SEL 3 #define MTK_SPI_PAUSE_INT_STATUS 0x2 @@ -87,6 +101,8 @@ #define MTK_SPI_MAX_FIFO_SIZE 32U #define MTK_SPI_PACKET_SIZE 1024 #define MTK_SPI_IPM_PACKET_SIZE SZ_64K +#define MTK_SPI_IPM_PACKET_LOOP SZ_256 + #define MTK_SPI_32BITS_MASK (0xffffffff) #define DMA_ADDR_EXT_BITS (36) @@ -104,7 +120,8 @@ struct mtk_spi_compatible { bool no_need_unprepare; /* IPM design improve some single mode features */ bool ipm_design; - + /* IPM design that support quad mode */ + bool support_quad; }; struct mtk_spi { @@ -120,6 +137,11 @@ struct mtk_spi { u32 tx_sgl_len, rx_sgl_len; const struct mtk_spi_compatible *dev_comp; u32 spi_clk_hz; + struct completion spimem_done; + bool use_spimem; + struct device *dev; + dma_addr_t tx_dma; + dma_addr_t rx_dma; }; static const struct mtk_spi_compatible mtk_common_compat; @@ -134,6 +156,13 @@ static const struct mtk_spi_compatible ipm_compat_single = { .ipm_design = true, }; +static const struct mtk_spi_compatible ipm_compat_quad = { + .enhance_timing = true, + .dma_ext = true, + .ipm_design = true, + .support_quad = true, +}; + static const struct mtk_spi_compatible mt6765_compat = { .need_pad_sel = true, .must_tx = true, @@ -178,6 +207,9 @@ static const struct of_device_id mtk_spi_of_match[] = { { .compatible = "mediatek,ipm-spi-single", .data = (void *)&ipm_compat_single, }, + { .compatible = "mediatek,ipm-spi-quad", + .data = (void *)&ipm_compat_quad, + }, { .compatible = "mediatek,mt2701-spi", .data = (void *)&mtk_common_compat, }, @@ -694,6 +726,13 @@ static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id) else mdata->state = MTK_SPI_IDLE; + /* SPI-MEM ops */ + if (mdata->use_spimem) { + complete(&mdata->spimem_done); + + return IRQ_HANDLED; + } + if (!master->can_dma(master, NULL, trans)) { if (trans->rx_buf) { cnt = mdata->xfer_len / 4; @@ -777,6 +816,266 @@ static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } +static int mtk_spi_mem_adjust_op_size(struct spi_mem *mem, + struct spi_mem_op *op) +{ + int opcode_len; + + if (op->data.dir != SPI_MEM_NO_DATA) { + opcode_len = 1 + op->addr.nbytes + op->dummy.nbytes; + if (opcode_len + op->data.nbytes > MTK_SPI_IPM_PACKET_SIZE) { + op->data.nbytes = MTK_SPI_IPM_PACKET_SIZE - opcode_len; + /* force data buffer dma-aligned. */ + op->data.nbytes -= op->data.nbytes % 4; + } + } + + return 0; +} + +static bool mtk_spi_mem_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + if (op->data.buswidth > 4 || op->addr.buswidth > 4 || + op->dummy.buswidth > 4 || op->cmd.buswidth > 4) + return false; + + if (op->addr.nbytes && op->dummy.nbytes && + op->addr.buswidth != op->dummy.buswidth) + return false; + + if (op->addr.nbytes + op->dummy.nbytes > 16) + return false; + + if (op->data.nbytes > MTK_SPI_IPM_PACKET_SIZE) { + if (op->data.nbytes / MTK_SPI_IPM_PACKET_SIZE > + MTK_SPI_IPM_PACKET_LOOP || + op->data.nbytes % MTK_SPI_IPM_PACKET_SIZE != 0) + return false; + } + + return true; +} + +static void mtk_spi_mem_setup_dma_xfer(struct spi_master *master, + const struct spi_mem_op *op) +{ + struct mtk_spi *mdata = spi_master_get_devdata(master); + + writel((u32)(mdata->tx_dma & MTK_SPI_32BITS_MASK), + mdata->base + SPI_TX_SRC_REG); +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT + if (mdata->dev_comp->dma_ext) + writel((u32)(mdata->tx_dma >> 32), + mdata->base + SPI_TX_SRC_REG_64); +#endif + + if (op->data.dir == SPI_MEM_DATA_IN) { + writel((u32)(mdata->rx_dma & MTK_SPI_32BITS_MASK), + mdata->base + SPI_RX_DST_REG); +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT + if (mdata->dev_comp->dma_ext) + writel((u32)(mdata->rx_dma >> 32), + mdata->base + SPI_RX_DST_REG_64); +#endif + } +} + +static int mtk_spi_transfer_wait(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + struct mtk_spi *mdata = spi_master_get_devdata(mem->spi->master); + unsigned long long ms = 1; + + if (op->data.dir == SPI_MEM_NO_DATA) + ms = 8LL * 1000LL * 32; + else + ms = 8LL * 1000LL * op->data.nbytes; + do_div(ms, mem->spi->max_speed_hz); + ms += ms + 1000; /* 1s tolerance */ + + if (ms > UINT_MAX) + ms = UINT_MAX; + + if (!wait_for_completion_timeout(&mdata->spimem_done, + msecs_to_jiffies(ms))) { + dev_err(mdata->dev, "spi-mem transfer timeout\n"); + return -ETIMEDOUT; + } + + return 0; +} + +static int mtk_spi_mem_exec_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + struct mtk_spi *mdata = spi_master_get_devdata(mem->spi->master); + u32 reg_val, nio = 1, tx_size; + char *tx_tmp_buf, *rx_tmp_buf; + int ret = 0; + + mdata->use_spimem = true; + reinit_completion(&mdata->spimem_done); + + mtk_spi_reset(mdata); + mtk_spi_hw_init(mem->spi->master, mem->spi); + mtk_spi_prepare_transfer(mem->spi->master, mem->spi->max_speed_hz); + + reg_val = readl(mdata->base + SPI_CFG3_IPM_REG); + /* opcode byte len */ + reg_val &= ~SPI_CFG3_IPM_CMD_BYTELEN_MASK; + reg_val |= 1 << SPI_CFG3_IPM_CMD_BYTELEN_OFFSET; + + /* addr & dummy byte len */ + reg_val &= ~SPI_CFG3_IPM_ADDR_BYTELEN_MASK; + if (op->addr.nbytes || op->dummy.nbytes) + reg_val |= (op->addr.nbytes + op->dummy.nbytes) << + SPI_CFG3_IPM_ADDR_BYTELEN_OFFSET; + + /* data byte len */ + if (op->data.dir == SPI_MEM_NO_DATA) { + reg_val |= SPI_CFG3_IPM_NODATA_FLAG; + writel(0, mdata->base + SPI_CFG1_REG); + } else { + reg_val &= ~SPI_CFG3_IPM_NODATA_FLAG; + mdata->xfer_len = op->data.nbytes; + mtk_spi_setup_packet(mem->spi->master); + } + + if (op->addr.nbytes || op->dummy.nbytes) { + if (op->addr.buswidth == 1 || op->dummy.buswidth == 1) + reg_val |= SPI_CFG3_IPM_XMODE_EN; + else + reg_val &= ~SPI_CFG3_IPM_XMODE_EN; + } + + if (op->addr.buswidth == 2 || + op->dummy.buswidth == 2 || + op->data.buswidth == 2) + nio = 2; + else if (op->addr.buswidth == 4 || + op->dummy.buswidth == 4 || + op->data.buswidth == 4) + nio = 4; + + reg_val &= ~SPI_CFG3_IPM_CMD_PIN_MODE_MASK; + reg_val |= PIN_MODE_CFG(nio) << SPI_CFG3_IPM_PIN_MODE_OFFSET; + + reg_val |= SPI_CFG3_IPM_HALF_DUPLEX_EN; + if (op->data.dir == SPI_MEM_DATA_IN) + reg_val |= SPI_CFG3_IPM_HALF_DUPLEX_DIR; + else + reg_val &= ~SPI_CFG3_IPM_HALF_DUPLEX_DIR; + writel(reg_val, mdata->base + SPI_CFG3_IPM_REG); + + tx_size = 1 + op->addr.nbytes + op->dummy.nbytes; + if (op->data.dir == SPI_MEM_DATA_OUT) + tx_size += op->data.nbytes; + + tx_size = max_t(u32, tx_size, 32); + + tx_tmp_buf = kzalloc(tx_size, GFP_KERNEL | GFP_DMA); + if (!tx_tmp_buf) + return -ENOMEM; + + tx_tmp_buf[0] = op->cmd.opcode; + + if (op->addr.nbytes) { + int i; + + for (i = 0; i < op->addr.nbytes; i++) + tx_tmp_buf[i + 1] = op->addr.val >> + (8 * (op->addr.nbytes - i - 1)); + } + + if (op->dummy.nbytes) + memset(tx_tmp_buf + op->addr.nbytes + 1, + 0xff, + op->dummy.nbytes); + + if (op->data.nbytes && op->data.dir == SPI_MEM_DATA_OUT) + memcpy(tx_tmp_buf + op->dummy.nbytes + op->addr.nbytes + 1, + op->data.buf.out, + op->data.nbytes); + + mdata->tx_dma = dma_map_single(mdata->dev, tx_tmp_buf, + tx_size, DMA_TO_DEVICE); + if (dma_mapping_error(mdata->dev, mdata->tx_dma)) { + ret = -ENOMEM; + goto err_exit; + } + + if (op->data.dir == SPI_MEM_DATA_IN) { + if (!IS_ALIGNED((size_t)op->data.buf.in, 4)) { + rx_tmp_buf = kzalloc(op->data.nbytes, + GFP_KERNEL | GFP_DMA); + if (!rx_tmp_buf) { + ret = -ENOMEM; + goto unmap_tx_dma; + } + } else { + rx_tmp_buf = op->data.buf.in; + } + + mdata->rx_dma = dma_map_single(mdata->dev, + rx_tmp_buf, + op->data.nbytes, + DMA_FROM_DEVICE); + if (dma_mapping_error(mdata->dev, mdata->rx_dma)) { + ret = -ENOMEM; + goto kfree_rx_tmp_buf; + } + } + + reg_val = readl(mdata->base + SPI_CMD_REG); + reg_val |= SPI_CMD_TX_DMA; + if (op->data.dir == SPI_MEM_DATA_IN) + reg_val |= SPI_CMD_RX_DMA; + writel(reg_val, mdata->base + SPI_CMD_REG); + + mtk_spi_mem_setup_dma_xfer(mem->spi->master, op); + + mtk_spi_enable_transfer(mem->spi->master); + + /* Wait for the interrupt. */ + ret = mtk_spi_transfer_wait(mem, op); + if (ret) + goto unmap_rx_dma; + + /* spi disable dma */ + reg_val = readl(mdata->base + SPI_CMD_REG); + reg_val &= ~SPI_CMD_TX_DMA; + if (op->data.dir == SPI_MEM_DATA_IN) + reg_val &= ~SPI_CMD_RX_DMA; + writel(reg_val, mdata->base + SPI_CMD_REG); + +unmap_rx_dma: + if (op->data.dir == SPI_MEM_DATA_IN) { + dma_unmap_single(mdata->dev, mdata->rx_dma, + op->data.nbytes, DMA_FROM_DEVICE); + if (!IS_ALIGNED((size_t)op->data.buf.in, 4)) + memcpy(op->data.buf.in, rx_tmp_buf, op->data.nbytes); + } +kfree_rx_tmp_buf: + if (op->data.dir == SPI_MEM_DATA_IN && + !IS_ALIGNED((size_t)op->data.buf.in, 4)) + kfree(rx_tmp_buf); +unmap_tx_dma: + dma_unmap_single(mdata->dev, mdata->tx_dma, + tx_size, DMA_TO_DEVICE); +err_exit: + kfree(tx_tmp_buf); + mdata->use_spimem = false; + + return ret; +} + +static const struct spi_controller_mem_ops mtk_spi_mem_ops = { + .adjust_op_size = mtk_spi_mem_adjust_op_size, + .supports_op = mtk_spi_mem_supports_op, + .exec_op = mtk_spi_mem_exec_op, +}; + static int mtk_spi_probe(struct platform_device *pdev) { struct spi_master *master; @@ -820,6 +1119,15 @@ static int mtk_spi_probe(struct platform_device *pdev) if (mdata->dev_comp->ipm_design) master->mode_bits |= SPI_LOOP; + if (mdata->dev_comp->support_quad) { + master->mem_ops = &mtk_spi_mem_ops; + master->mode_bits |= SPI_RX_DUAL | SPI_TX_DUAL | + SPI_RX_QUAD | SPI_TX_QUAD; + + mdata->dev = &pdev->dev; + init_completion(&mdata->spimem_done); + } + if (mdata->dev_comp->need_pad_sel) { mdata->pad_num = of_property_count_u32_elems( pdev->dev.of_node,
this patch add the support of spi-mem. Signed-off-by: Leilk Liu <leilk.liu@mediatek.com> --- drivers/spi/spi-mt65xx.c | 310 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 309 insertions(+), 1 deletion(-)