From: Mark Brown <broonie@xxxxxxxxxx>
All the platforms which use the old S3C_DMA API have now been converted to
dmaengine so we can remove the legacy code from the driver, simplifying
maintenance.
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
drivers/spi/spi-s3c64xx.c | 191 ----------------------------------------------
1 file changed, 191 deletions(-)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 4490e8c499c0..18ec7e65a319 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -34,10 +34,6 @@
#include <linux/platform_data/spi-s3c64xx.h>
-#ifdef CONFIG_S3C_DMA
-#include <mach/dma.h>
-#endif
-
#define MAX_SPI_PORTS 3
#define S3C64XX_SPI_QUIRK_POLL (1 << 0)
@@ -200,9 +196,6 @@ struct s3c64xx_spi_driver_data {
unsigned cur_speed;
struct s3c64xx_spi_dma_data rx_dma;
struct s3c64xx_spi_dma_data tx_dma;
-#ifdef CONFIG_S3C_DMA
- struct samsung_dma_ops *ops;
-#endif
struct s3c64xx_spi_port_config *port_conf;
unsigned int port_id;
bool cs_gpio;
@@ -284,180 +277,6 @@ static void s3c64xx_spi_dmacb(void *data)
spin_unlock_irqrestore(&sdd->lock, flags);
}
-#ifdef CONFIG_S3C_DMA
-/* FIXME: remove this section once arch/arm/mach-s3c64xx uses dmaengine */
-
-static struct s3c2410_dma_client s3c64xx_spi_dma_client = {
- .name = "samsung-spi-dma",
-};
-
-static int s3c64xx_spi_map_mssg(struct s3c64xx_spi_driver_data *sdd,
- struct spi_message *msg)
-{
- struct device *dev = &sdd->pdev->dev;
- struct spi_transfer *xfer;
-
- if (is_polling(sdd) || msg->is_dma_mapped)
- return 0;
-
- /* First mark all xfer unmapped */
- list_for_each_entry(xfer, &msg->transfers, transfer_list) {
- xfer->rx_dma = XFER_DMAADDR_INVALID;
- xfer->tx_dma = XFER_DMAADDR_INVALID;
- }
-
- /* Map until end or first fail */
- list_for_each_entry(xfer, &msg->transfers, transfer_list) {
-
- if (xfer->len <= ((FIFO_LVL_MASK(sdd) >> 1) + 1))
- continue;
-
- if (xfer->tx_buf != NULL) {
- xfer->tx_dma = dma_map_single(dev,
- (void *)xfer->tx_buf, xfer->len,
- DMA_TO_DEVICE);
- if (dma_mapping_error(dev, xfer->tx_dma)) {
- dev_err(dev, "dma_map_single Tx failed\n");
- xfer->tx_dma = XFER_DMAADDR_INVALID;
- return -ENOMEM;
- }
- }
-
- if (xfer->rx_buf != NULL) {
- xfer->rx_dma = dma_map_single(dev, xfer->rx_buf,
- xfer->len, DMA_FROM_DEVICE);
- if (dma_mapping_error(dev, xfer->rx_dma)) {
- dev_err(dev, "dma_map_single Rx failed\n");
- dma_unmap_single(dev, xfer->tx_dma,
- xfer->len, DMA_TO_DEVICE);
- xfer->tx_dma = XFER_DMAADDR_INVALID;
- xfer->rx_dma = XFER_DMAADDR_INVALID;
- return -ENOMEM;
- }
- }
- }
-
- return 0;
-}
-
-static void s3c64xx_spi_unmap_mssg(struct s3c64xx_spi_driver_data *sdd,
- struct spi_message *msg)
-{
- struct device *dev = &sdd->pdev->dev;
- struct spi_transfer *xfer;
-
- if (is_polling(sdd) || msg->is_dma_mapped)
- return;
-
- list_for_each_entry(xfer, &msg->transfers, transfer_list) {
-
- if (xfer->len <= ((FIFO_LVL_MASK(sdd) >> 1) + 1))
- continue;
-
- if (xfer->rx_buf != NULL
- && xfer->rx_dma != XFER_DMAADDR_INVALID)
- dma_unmap_single(dev, xfer->rx_dma,
- xfer->len, DMA_FROM_DEVICE);
-
- if (xfer->tx_buf != NULL
- && xfer->tx_dma != XFER_DMAADDR_INVALID)
- dma_unmap_single(dev, xfer->tx_dma,
- xfer->len, DMA_TO_DEVICE);
- }
-}
-
-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;
- struct samsung_dma_config config;
-
- if (dma->direction == DMA_DEV_TO_MEM) {
- sdd = container_of((void *)dma,
- struct s3c64xx_spi_driver_data, rx_dma);
- config.direction = sdd->rx_dma.direction;
- config.fifo = sdd->sfr_start + S3C64XX_SPI_RX_DATA;
- config.width = sdd->cur_bpw / 8;
- sdd->ops->config((enum dma_ch)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((enum dma_ch)sdd->tx_dma.ch, &config);
- }
-
- info.cap = DMA_SLAVE;
- info.len = len;
- info.fp = s3c64xx_spi_dmacb;
- info.fp_param = dma;
- info.direction = dma->direction;
- info.buf = buf;
-
- sdd->ops->prepare((enum dma_ch)dma->ch, &info);
- sdd->ops->trigger((enum dma_ch)dma->ch);
-}
-
-static int acquire_dma(struct s3c64xx_spi_driver_data *sdd)
-{
- struct samsung_dma_req req;
- struct device *dev = &sdd->pdev->dev;
-
- sdd->ops = samsung_dma_get_ops();
-
- req.cap = DMA_SLAVE;
- req.client = &s3c64xx_spi_dma_client;
-
- sdd->rx_dma.ch = (struct dma_chan *)(unsigned long)sdd->ops->request(
- sdd->rx_dma.dmach, &req, dev, "rx");
- sdd->tx_dma.ch = (struct dma_chan *)(unsigned long)sdd->ops->request(
- sdd->tx_dma.dmach, &req, dev, "tx");
-
- return 1;
-}
-
-static int s3c64xx_spi_prepare_transfer(struct spi_master *spi)
-{
- struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);
-
- /*
- * If DMA resource was not available during
- * probe, no need to continue with dma requests
- * else Acquire DMA channels
- */
- while (!is_polling(sdd) && !acquire_dma(sdd))
- usleep_range(10000, 11000);
-
- return 0;
-}
-
-static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi)
-{
- struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);
-
- /* Free DMA channels */
- if (!is_polling(sdd)) {
- sdd->ops->release((enum dma_ch)sdd->rx_dma.ch,
- &s3c64xx_spi_dma_client);
- sdd->ops->release((enum dma_ch)sdd->tx_dma.ch,
- &s3c64xx_spi_dma_client);
- }
-
- return 0;
-}
-
-static void s3c64xx_spi_dma_stop(struct s3c64xx_spi_driver_data *sdd,
- struct s3c64xx_spi_dma_data *dma)
-{
- sdd->ops->stop((enum dma_ch)dma->ch);
-}
-
-#define s3c64xx_spi_can_dma NULL
-
-#else
-
static int s3c64xx_spi_map_mssg(struct s3c64xx_spi_driver_data *sdd,
struct spi_message *msg)
{
@@ -583,8 +402,6 @@ static bool s3c64xx_spi_can_dma(struct spi_master *master,
return xfer->len > (FIFO_LVL_MASK(sdd) >> 1) + 1;
}
-#endif
-
static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
struct spi_device *spi,
struct spi_transfer *xfer, int dma_mode)
@@ -616,11 +433,7 @@ static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
chcfg |= S3C64XX_SPI_CH_TXCH_ON;
if (dma_mode) {
modecfg |= S3C64XX_SPI_MODE_TXDMA_ON;
-#ifndef CONFIG_S3C_DMA
prepare_dma(&sdd->tx_dma, &xfer->tx_sg);
-#else
- prepare_dma(&sdd->tx_dma, xfer->len, xfer->tx_dma);
-#endif
} else {
switch (sdd->cur_bpw) {
case 32:
@@ -652,11 +465,7 @@ static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
writel(((xfer->len * 8 / sdd->cur_bpw) & 0xffff)
| S3C64XX_SPI_PACKET_CNT_EN,
regs + S3C64XX_SPI_PACKET_CNT);
-#ifndef CONFIG_S3C_DMA
prepare_dma(&sdd->rx_dma, &xfer->rx_sg);
-#else
- prepare_dma(&sdd->rx_dma, xfer->len, xfer->rx_dma);
-#endif
}
}
--
1.9.rc1
--
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