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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2019-05-21 09:06:41 +0200 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2019-06-27 20:05:29 +0200 |
| commit | e0ddaab76802d3179013f4864535043e2aea6c69 (patch) | |
| tree | 992fba574f07acb858f55e728b3f566f8bde2ab1 /drivers/mtd | |
| parent | 475345e89ced298afbeefed6c86122bb8415593d (diff) | |
| download | linux-e0ddaab76802d3179013f4864535043e2aea6c69.tar.bz2 | |
dmaengine: mxs: Add header file to be shared with gpmi nand driver
The mxs dma driver can do PIO transfers. A pointer to the PIO words
to transfer is passed in the struct scatterlist * argument of
dmaengine_prep_slave_sg(). It's quite ugly and non obvious to cast
u32 * to struct scatterlist * each time when calling
dmaengine_prep_slave_sg(), so add a static inline wrapper function
to be called by the user along with a description what is going on.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 36 |
1 files changed, 14 insertions, 22 deletions
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c index 74c4de0b1a3d..45c7b91aae23 100644 --- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c @@ -15,6 +15,7 @@ #include <linux/of.h> #include <linux/of_device.h> #include <linux/pm_runtime.h> +#include <linux/dma/mxs-dma.h> #include "gpmi-nand.h" #include "gpmi-regs.h" #include "bch-regs.h" @@ -914,9 +915,8 @@ static int gpmi_send_command(struct gpmi_nand_data *this) | BM_GPMI_CTRL0_ADDRESS_INCREMENT | BF_GPMI_CTRL0_XFER_COUNT(this->command_length); pio[1] = pio[2] = 0; - desc = dmaengine_prep_slave_sg(channel, - (struct scatterlist *)pio, - ARRAY_SIZE(pio), DMA_TRANS_NONE, 0); + desc = mxs_dmaengine_prep_pio(channel, pio, ARRAY_SIZE(pio), + DMA_TRANS_NONE, 0); if (!desc) return -EINVAL; @@ -988,8 +988,8 @@ static int gpmi_send_data(struct gpmi_nand_data *this, const void *buf, int len) | BF_GPMI_CTRL0_ADDRESS(address) | BF_GPMI_CTRL0_XFER_COUNT(len); pio[1] = 0; - desc = dmaengine_prep_slave_sg(channel, (struct scatterlist *)pio, - ARRAY_SIZE(pio), DMA_TRANS_NONE, 0); + desc = mxs_dmaengine_prep_pio(channel, pio, ARRAY_SIZE(pio), + DMA_TRANS_NONE, 0); if (!desc) return -EINVAL; @@ -1025,9 +1025,8 @@ static int gpmi_read_data(struct gpmi_nand_data *this, void *buf, int len) | BF_GPMI_CTRL0_ADDRESS(BV_GPMI_CTRL0_ADDRESS__NAND_DATA) | BF_GPMI_CTRL0_XFER_COUNT(len); pio[1] = 0; - desc = dmaengine_prep_slave_sg(channel, - (struct scatterlist *)pio, - ARRAY_SIZE(pio), DMA_TRANS_NONE, 0); + desc = mxs_dmaengine_prep_pio(channel, pio, ARRAY_SIZE(pio), + DMA_TRANS_NONE, 0); if (!desc) return -EINVAL; @@ -1083,10 +1082,8 @@ static int gpmi_send_page(struct gpmi_nand_data *this, dma_addr_t payload, pio[4] = payload; pio[5] = auxiliary; - desc = dmaengine_prep_slave_sg(channel, - (struct scatterlist *)pio, - ARRAY_SIZE(pio), DMA_TRANS_NONE, - DMA_CTRL_ACK); + desc = mxs_dmaengine_prep_pio(channel, pio, ARRAY_SIZE(pio), + DMA_TRANS_NONE, DMA_CTRL_ACK); if (!desc) return -EINVAL; @@ -1117,9 +1114,7 @@ static int gpmi_read_page(struct gpmi_nand_data *this, dma_addr_t payload, | BF_GPMI_CTRL0_ADDRESS(address) | BF_GPMI_CTRL0_XFER_COUNT(0); pio[1] = 0; - desc = dmaengine_prep_slave_sg(channel, - (struct scatterlist *)pio, 2, - DMA_TRANS_NONE, 0); + desc = mxs_dmaengine_prep_pio(channel, pio, 2, DMA_TRANS_NONE, 0); if (!desc) return -EINVAL; @@ -1144,10 +1139,8 @@ static int gpmi_read_page(struct gpmi_nand_data *this, dma_addr_t payload, pio[3] = geo->page_size; pio[4] = payload; pio[5] = auxiliary; - desc = dmaengine_prep_slave_sg(channel, - (struct scatterlist *)pio, - ARRAY_SIZE(pio), DMA_TRANS_NONE, - DMA_CTRL_ACK); + desc = mxs_dmaengine_prep_pio(channel, pio, ARRAY_SIZE(pio), + DMA_TRANS_NONE, DMA_CTRL_ACK); if (!desc) return -EINVAL; @@ -1163,9 +1156,8 @@ static int gpmi_read_page(struct gpmi_nand_data *this, dma_addr_t payload, | BF_GPMI_CTRL0_XFER_COUNT(geo->page_size); pio[1] = 0; pio[2] = 0; /* clear GPMI_HW_GPMI_ECCCTRL, disable the BCH. */ - desc = dmaengine_prep_slave_sg(channel, - (struct scatterlist *)pio, 3, - DMA_TRANS_NONE, DMA_CTRL_ACK); + desc = mxs_dmaengine_prep_pio(channel, pio, 3, DMA_TRANS_NONE, + DMA_CTRL_ACK); if (!desc) return -EINVAL; |