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Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma

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* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (63 commits)
  dmaengine: mid_dma: mask_peripheral_interrupt only when dmac is idle
  dmaengine/ep93xx_dma: add module.h include
  pch_dma: Reduce wasting memory
  pch_dma: Fix suspend issue
  dma/timberdale: free_irq() on an error path
  dma: shdma: transfer based runtime PM
  dmaengine: shdma: protect against the IRQ handler
  dmaengine i.MX DMA/SDMA: add missing include of linux/module.h
  dmaengine: delete redundant chan_id and chancnt initialization in dma drivers
  dmaengine/amba-pl08x: Check txd->llis_va before freeing dma_pool
  dmaengine/amba-pl08x: Add support for sg len greater than one for slave transfers
  serial: sh-sci: don't filter on DMA device, use only channel ID
  ARM: SAMSUNG: Remove Samsung specific enum type for dma direction
  ASoC: Samsung: Update DMA interface
  spi/s3c64xx: Merge dma control code
  spi/s3c64xx: Add support DMA engine API
  ARM: SAMSUNG: Remove S3C-PL330-DMA driver
  ARM: S5P64X0: Use generic DMA PL330 driver
  ARM: S5PC100: Use generic DMA PL330 driver
  ARM: S5PV210: Use generic DMA PL330 driver
  ...

Fix up fairly trivial conflicts in
 - arch/arm/mach-exynos4/{Kconfig,clock.c}
 - arch/arm/mach-s5p64x0/dma.c
This commit is contained in:
Linus Torvalds
2011-11-04 18:02:25 -07:00
parent 3d0a8d10cf 4598fc2c94
commit fba9569924
60 changed files with 2323 additions and 2466 deletions
Download Patch File Download Diff File Expand all files Collapse all files

175
drivers/spi/spi-s3c64xx.c
View File

@@ -131,6 +131,12 @@
#define RXBUSY (1<<2)
#define TXBUSY (1<<3)
struct s3c64xx_spi_dma_data {
unsigned ch;
enum dma_data_direction direction;
enum dma_ch dmach;
};
/**
* struct s3c64xx_spi_driver_data - Runtime info holder for SPI driver.
* @clk: Pointer to the spi clock.
@@ -164,13 +170,14 @@ struct s3c64xx_spi_driver_data {
struct work_struct work;
struct list_head queue;
spinlock_t lock;
enum dma_ch rx_dmach;
enum dma_ch tx_dmach;
unsigned long sfr_start;
struct completion xfer_completion;
unsigned state;
unsigned cur_mode, cur_bpw;
unsigned cur_speed;
struct s3c64xx_spi_dma_data rx_dma;
struct s3c64xx_spi_dma_data tx_dma;
struct samsung_dma_ops *ops;
};
static struct s3c2410_dma_client s3c64xx_spi_dma_client = {
@@ -226,6 +233,78 @@ static void flush_fifo(struct s3c64xx_spi_driver_data *sdd)
writel(val, regs + S3C64XX_SPI_CH_CFG);
}
static void s3c64xx_spi_dmacb(void *data)
{
struct s3c64xx_spi_driver_data *sdd;
struct s3c64xx_spi_dma_data *dma = data;
unsigned long flags;
if (dma->direction == DMA_FROM_DEVICE)
sdd = container_of(data,
struct s3c64xx_spi_driver_data, rx_dma);
else
sdd = container_of(data,
struct s3c64xx_spi_driver_data, tx_dma);
spin_lock_irqsave(&sdd->lock, flags);
if (dma->direction == DMA_FROM_DEVICE) {
sdd->state &= ~RXBUSY;
if (!(sdd->state & TXBUSY))
complete(&sdd->xfer_completion);
} else {
sdd->state &= ~TXBUSY;
if (!(sdd->state & RXBUSY))
complete(&sdd->xfer_completion);
}
spin_unlock_irqrestore(&sdd->lock, flags);
}
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;
if (dma->direction == DMA_FROM_DEVICE)
sdd = container_of((void *)dma,
struct s3c64xx_spi_driver_data, rx_dma);
else
sdd = container_of((void *)dma,
struct s3c64xx_spi_driver_data, tx_dma);
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(dma->ch, &info);
sdd->ops->trigger(dma->ch);
}
static int acquire_dma(struct s3c64xx_spi_driver_data *sdd)
{
struct samsung_dma_info info;
sdd->ops = samsung_dma_get_ops();
info.cap = DMA_SLAVE;
info.client = &s3c64xx_spi_dma_client;
info.width = sdd->cur_bpw / 8;
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);
return 1;
}
static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
struct spi_device *spi,
struct spi_transfer *xfer, int dma_mode)
@@ -258,10 +337,7 @@ 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;
s3c2410_dma_config(sdd->tx_dmach, sdd->cur_bpw / 8);
s3c2410_dma_enqueue(sdd->tx_dmach, (void *)sdd,
xfer->tx_dma, xfer->len);
s3c2410_dma_ctrl(sdd->tx_dmach, S3C2410_DMAOP_START);
prepare_dma(&sdd->tx_dma, xfer->len, xfer->tx_dma);
} else {
switch (sdd->cur_bpw) {
case 32:
@@ -293,10 +369,7 @@ 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);
s3c2410_dma_config(sdd->rx_dmach, sdd->cur_bpw / 8);
s3c2410_dma_enqueue(sdd->rx_dmach, (void *)sdd,
xfer->rx_dma, xfer->len);
s3c2410_dma_ctrl(sdd->rx_dmach, S3C2410_DMAOP_START);
prepare_dma(&sdd->rx_dma, xfer->len, xfer->rx_dma);
}
}
@@ -482,46 +555,6 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
}
}
static void s3c64xx_spi_dma_rxcb(struct s3c2410_dma_chan *chan, void *buf_id,
int size, enum s3c2410_dma_buffresult res)
{
struct s3c64xx_spi_driver_data *sdd = buf_id;
unsigned long flags;
spin_lock_irqsave(&sdd->lock, flags);
if (res == S3C2410_RES_OK)
sdd->state &= ~RXBUSY;
else
dev_err(&sdd->pdev->dev, "DmaAbrtRx-%d\n", size);
/* If the other done */
if (!(sdd->state & TXBUSY))
complete(&sdd->xfer_completion);
spin_unlock_irqrestore(&sdd->lock, flags);
}
static void s3c64xx_spi_dma_txcb(struct s3c2410_dma_chan *chan, void *buf_id,
int size, enum s3c2410_dma_buffresult res)
{
struct s3c64xx_spi_driver_data *sdd = buf_id;
unsigned long flags;
spin_lock_irqsave(&sdd->lock, flags);
if (res == S3C2410_RES_OK)
sdd->state &= ~TXBUSY;
else
dev_err(&sdd->pdev->dev, "DmaAbrtTx-%d \n", size);
/* If the other done */
if (!(sdd->state & RXBUSY))
complete(&sdd->xfer_completion);
spin_unlock_irqrestore(&sdd->lock, flags);
}
#define XFER_DMAADDR_INVALID DMA_BIT_MASK(32)
static int s3c64xx_spi_map_mssg(struct s3c64xx_spi_driver_data *sdd,
@@ -696,12 +729,10 @@ static void handle_msg(struct s3c64xx_spi_driver_data *sdd,
if (use_dma) {
if (xfer->tx_buf != NULL
&& (sdd->state & TXBUSY))
s3c2410_dma_ctrl(sdd->tx_dmach,
S3C2410_DMAOP_FLUSH);
sdd->ops->stop(sdd->tx_dma.ch);
if (xfer->rx_buf != NULL
&& (sdd->state & RXBUSY))
s3c2410_dma_ctrl(sdd->rx_dmach,
S3C2410_DMAOP_FLUSH);
sdd->ops->stop(sdd->rx_dma.ch);
}
goto out;
@@ -739,30 +770,6 @@ out:
msg->complete(msg->context);
}
static int acquire_dma(struct s3c64xx_spi_driver_data *sdd)
{
if (s3c2410_dma_request(sdd->rx_dmach,
&s3c64xx_spi_dma_client, NULL) < 0) {
dev_err(&sdd->pdev->dev, "cannot get RxDMA\n");
return 0;
}
s3c2410_dma_set_buffdone_fn(sdd->rx_dmach, s3c64xx_spi_dma_rxcb);
s3c2410_dma_devconfig(sdd->rx_dmach, S3C2410_DMASRC_HW,
sdd->sfr_start + S3C64XX_SPI_RX_DATA);
if (s3c2410_dma_request(sdd->tx_dmach,
&s3c64xx_spi_dma_client, NULL) < 0) {
dev_err(&sdd->pdev->dev, "cannot get TxDMA\n");
s3c2410_dma_free(sdd->rx_dmach, &s3c64xx_spi_dma_client);
return 0;
}
s3c2410_dma_set_buffdone_fn(sdd->tx_dmach, s3c64xx_spi_dma_txcb);
s3c2410_dma_devconfig(sdd->tx_dmach, S3C2410_DMASRC_MEM,
sdd->sfr_start + S3C64XX_SPI_TX_DATA);
return 1;
}
static void s3c64xx_spi_work(struct work_struct *work)
{
struct s3c64xx_spi_driver_data *sdd = container_of(work,
@@ -799,8 +806,8 @@ static void s3c64xx_spi_work(struct work_struct *work)
spin_unlock_irqrestore(&sdd->lock, flags);
/* Free DMA channels */
s3c2410_dma_free(sdd->tx_dmach, &s3c64xx_spi_dma_client);
s3c2410_dma_free(sdd->rx_dmach, &s3c64xx_spi_dma_client);
sdd->ops->release(sdd->rx_dma.ch, &s3c64xx_spi_dma_client);
sdd->ops->release(sdd->tx_dma.ch, &s3c64xx_spi_dma_client);
}
static int s3c64xx_spi_transfer(struct spi_device *spi,
@@ -1017,8 +1024,10 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
sdd->cntrlr_info = sci;
sdd->pdev = pdev;
sdd->sfr_start = mem_res->start;
sdd->tx_dmach = dmatx_res->start;
sdd->rx_dmach = dmarx_res->start;
sdd->tx_dma.dmach = dmatx_res->start;
sdd->tx_dma.direction = DMA_TO_DEVICE;
sdd->rx_dma.dmach = dmarx_res->start;
sdd->rx_dma.direction = DMA_FROM_DEVICE;
sdd->cur_bpw = 8;
@@ -1106,7 +1115,7 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
pdev->id, master->num_chipselect);
dev_dbg(&pdev->dev, "\tIOmem=[0x%x-0x%x]\tDMA=[Rx-%d, Tx-%d]\n",
mem_res->end, mem_res->start,
sdd->rx_dmach, sdd->tx_dmach);
sdd->rx_dma.dmach, sdd->tx_dma.dmach);
return 0;