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spi/s3c64xx: Add the use of DMA config operation

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Config operation is separated from request operation in
DMA common operation. Because spi driver can change the
DMA config for every transfer. So this patch is using the
separated DMA config operation.

Signed-off-by: Boojin Kim <boojin.kim@samsung.com>
Signed-off-by: Kyoungil Kim <ki0351.kim@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Boojin Kim 2012-06-19 13:27:03 +09:00 committed by Kukjin Kim
parent fbb20e81bd
commit 4969c32bab
1 changed files with 18 additions and 13 deletions
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31
drivers/spi/spi-s3c64xx.c
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@ -262,14 +262,24 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
unsigned len, dma_addr_t buf)
{
struct s3c64xx_spi_driver_data *sdd;
struct samsung_dma_prep_info info;
struct samsung_dma_prep info;
struct samsung_dma_config config;
if (dma->direction == DMA_DEV_TO_MEM)
if (dma->direction == DMA_DEV_TO_MEM) {
sdd = container_of((void *)dma,
struct s3c64xx_spi_driver_data, rx_dma);
else
config.direction = sdd->rx_dma.direction;
config.fifo = sdd->sfr_start + S3C64XX_SPI_RX_DATA;
config.width = sdd->cur_bpw / 8;
sdd->ops->config(sdd->rx_dma.ch, &config);
} else {
sdd = container_of((void *)dma,
struct s3c64xx_spi_driver_data, tx_dma);
config.direction = sdd->tx_dma.direction;
config.fifo = sdd->sfr_start + S3C64XX_SPI_TX_DATA;
config.width = sdd->cur_bpw / 8;
sdd->ops->config(sdd->tx_dma.ch, &config);
}
info.cap = DMA_SLAVE;
info.len = len;
@ -284,20 +294,15 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
static int acquire_dma(struct s3c64xx_spi_driver_data *sdd)
{
struct samsung_dma_info info;
struct samsung_dma_req req;
sdd->ops = samsung_dma_get_ops();
info.cap = DMA_SLAVE;
info.client = &s3c64xx_spi_dma_client;
info.width = sdd->cur_bpw / 8;
req.cap = DMA_SLAVE;
req.client = &s3c64xx_spi_dma_client;
info.direction = sdd->rx_dma.direction;
info.fifo = sdd->sfr_start + S3C64XX_SPI_RX_DATA;
sdd->rx_dma.ch = sdd->ops->request(sdd->rx_dma.dmach, &info);
info.direction = sdd->tx_dma.direction;
info.fifo = sdd->sfr_start + S3C64XX_SPI_TX_DATA;
sdd->tx_dma.ch = sdd->ops->request(sdd->tx_dma.dmach, &info);
sdd->rx_dma.ch = sdd->ops->request(sdd->rx_dma.dmach, &req);
sdd->tx_dma.ch = sdd->ops->request(sdd->tx_dma.dmach, &req);
return 1;
}