Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-13 07:31:45 +00:00
Code Issues Packages Projects Releases Wiki Activity

dmaengine: bam-dma: Split device_control

Browse Source 
Split the device_control callback of the Qualcomm BAM DMA driver to make use
of the newly introduced callbacks, that will eventually be used to retrieve
slave capabilities.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Maxime Ripard 2014-11-17 14:42:30 +01:00 committed by Vinod Koul
parent 740aa95703
commit 62ec8eb52d
1 changed files with 41 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
drivers/dma/qcom_bam_dma.c
View File

@ -530,11 +530,18 @@ static void bam_free_chan(struct dma_chan *chan)
* Sets slave configuration for channel
*
*/
static void bam_slave_config(struct bam_chan *bchan,
struct dma_slave_config *cfg)
static int bam_slave_config(struct dma_chan *chan,
struct dma_slave_config *cfg)
{
struct bam_chan *bchan = to_bam_chan(chan);
unsigned long flag;
spin_lock_irqsave(&bchan->vc.lock, flag);
memcpy(&bchan->slave, cfg, sizeof(*cfg));
bchan->reconfigure = 1;
spin_unlock_irqrestore(&bchan->vc.lock, flag);
return 0;
}
/**
@ -627,8 +634,9 @@ err_out:
* No callbacks are done
*
*/
static void bam_dma_terminate_all(struct bam_chan *bchan)
static int bam_dma_terminate_all(struct dma_chan *chan)
{
struct bam_chan *bchan = to_bam_chan(chan);
unsigned long flag;
LIST_HEAD(head);
@ -643,56 +651,46 @@ static void bam_dma_terminate_all(struct bam_chan *bchan)
spin_unlock_irqrestore(&bchan->vc.lock, flag);
vchan_dma_desc_free_list(&bchan->vc, &head);
return 0;
}
/**
* bam_control - DMA device control
* bam_pause - Pause DMA channel
* @chan: dma channel
* @cmd: control cmd
* @arg: cmd argument
*
* Perform DMA control command
*
*/
static int bam_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg)
static int bam_pause(struct dma_chan *chan)
{
struct bam_chan *bchan = to_bam_chan(chan);
struct bam_device *bdev = bchan->bdev;
int ret = 0;
unsigned long flag;
switch (cmd) {
case DMA_PAUSE:
spin_lock_irqsave(&bchan->vc.lock, flag);
writel_relaxed(1, bam_addr(bdev, bchan->id, BAM_P_HALT));
bchan->paused = 1;
spin_unlock_irqrestore(&bchan->vc.lock, flag);
break;
spin_lock_irqsave(&bchan->vc.lock, flag);
writel_relaxed(1, bam_addr(bdev, bchan->id, BAM_P_HALT));
bchan->paused = 1;
spin_unlock_irqrestore(&bchan->vc.lock, flag);
case DMA_RESUME:
spin_lock_irqsave(&bchan->vc.lock, flag);
writel_relaxed(0, bam_addr(bdev, bchan->id, BAM_P_HALT));
bchan->paused = 0;
spin_unlock_irqrestore(&bchan->vc.lock, flag);
break;
return 0;
}
case DMA_TERMINATE_ALL:
bam_dma_terminate_all(bchan);
break;
/**
* bam_resume - Resume DMA channel operations
* @chan: dma channel
*
*/
static int bam_resume(struct dma_chan *chan)
{
struct bam_chan *bchan = to_bam_chan(chan);
struct bam_device *bdev = bchan->bdev;
unsigned long flag;
case DMA_SLAVE_CONFIG:
spin_lock_irqsave(&bchan->vc.lock, flag);
bam_slave_config(bchan, (struct dma_slave_config *)arg);
spin_unlock_irqrestore(&bchan->vc.lock, flag);
break;
spin_lock_irqsave(&bchan->vc.lock, flag);
writel_relaxed(0, bam_addr(bdev, bchan->id, BAM_P_HALT));
bchan->paused = 0;
spin_unlock_irqrestore(&bchan->vc.lock, flag);
default:
ret = -ENXIO;
break;
}
return ret;
return 0;
}
/**
@ -1148,7 +1146,10 @@ static int bam_dma_probe(struct platform_device *pdev)
bdev->common.device_alloc_chan_resources = bam_alloc_chan;
bdev->common.device_free_chan_resources = bam_free_chan;
bdev->common.device_prep_slave_sg = bam_prep_slave_sg;
bdev->common.device_control = bam_control;
bdev->common.device_config = bam_slave_config;
bdev->common.device_pause = bam_pause;
bdev->common.device_resume = bam_resume;
bdev->common.device_terminate_all = bam_dma_terminate_all;
bdev->common.device_issue_pending = bam_issue_pending;
bdev->common.device_tx_status = bam_tx_status;
bdev->common.dev = bdev->dev;
@ -1187,7 +1188,7 @@ static int bam_dma_remove(struct platform_device *pdev)
devm_free_irq(bdev->dev, bdev->irq, bdev);
for (i = 0; i < bdev->num_channels; i++) {
bam_dma_terminate_all(&bdev->channels[i]);
bam_dma_terminate_all(&bdev->channels[i].vc.chan);
tasklet_kill(&bdev->channels[i].vc.task);
dma_free_writecombine(bdev->dev, BAM_DESC_FIFO_SIZE,