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ASoC: DaVinci: pcm, rename variables in prep for ping/pong 

Rename variable master_lch to asp_channel
Rename variable slave_lch to asp_link[0]
Rename local variables:
	lch to link
	count to asp_count
	src to asp_src
	dst to asp_dst

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Troy Kisky 2009-11-18 17:49:52 -07:00 committed by Mark Brown
parent 0d6c977429
commit 1587ea3157
1 changed files with 33 additions and 33 deletions
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66
sound/soc/davinci/davinci-pcm.c
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@ -51,8 +51,8 @@ static struct snd_pcm_hardware davinci_pcm_hardware = {
struct davinci_runtime_data { struct davinci_runtime_data {
spinlock_t lock; spinlock_t lock;
int period; /* current DMA period */ int period; /* current DMA period */
int master_lch; /* Master DMA channel */ int asp_channel; /* Master DMA channel */
int slave_lch; /* linked parameter RAM reload slot */ int asp_link[2]; /* asp parameter link channel, ping/pong */
struct davinci_pcm_dma_params *params; /* DMA params */ struct davinci_pcm_dma_params *params; /* DMA params */
}; };
@ -60,7 +60,7 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
{ {
struct davinci_runtime_data *prtd = substream->runtime->private_data; struct davinci_runtime_data *prtd = substream->runtime->private_data;
struct snd_pcm_runtime *runtime = substream->runtime; struct snd_pcm_runtime *runtime = substream->runtime;
int lch = prtd->slave_lch; int link = prtd->asp_link[0];
unsigned int period_size; unsigned int period_size;
unsigned int dma_offset; unsigned int dma_offset;
dma_addr_t dma_pos; dma_addr_t dma_pos;
@ -78,7 +78,7 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
fifo_level = prtd->params->fifo_level; fifo_level = prtd->params->fifo_level;
pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d " pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d "
"dma_ptr = %x period_size=%x\n", lch, dma_pos, period_size); "dma_ptr = %x period_size=%x\n", link, dma_pos, period_size);
data_type = prtd->params->data_type; data_type = prtd->params->data_type;
count = period_size / data_type; count = period_size / data_type;
@ -102,16 +102,16 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
} }
acnt = prtd->params->acnt; acnt = prtd->params->acnt;
edma_set_src(lch, src, INCR, W8BIT); edma_set_src(link, src, INCR, W8BIT);
edma_set_dest(lch, dst, INCR, W8BIT); edma_set_dest(link, dst, INCR, W8BIT);
edma_set_src_index(lch, src_bidx, src_cidx); edma_set_src_index(link, src_bidx, src_cidx);
edma_set_dest_index(lch, dst_bidx, dst_cidx); edma_set_dest_index(link, dst_bidx, dst_cidx);
if (!fifo_level) if (!fifo_level)
edma_set_transfer_params(lch, acnt, count, 1, 0, ASYNC); edma_set_transfer_params(link, acnt, count, 1, 0, ASYNC);
else else
edma_set_transfer_params(lch, acnt, fifo_level, count, edma_set_transfer_params(link, acnt, fifo_level, count,
fifo_level, ABSYNC); fifo_level, ABSYNC);
prtd->period++; prtd->period++;
@ -119,12 +119,12 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
prtd->period = 0; prtd->period = 0;
} }
static void davinci_pcm_dma_irq(unsigned lch, u16 ch_status, void *data) static void davinci_pcm_dma_irq(unsigned link, u16 ch_status, void *data)
{ {
struct snd_pcm_substream *substream = data; struct snd_pcm_substream *substream = data;
struct davinci_runtime_data *prtd = substream->runtime->private_data; struct davinci_runtime_data *prtd = substream->runtime->private_data;
pr_debug("davinci_pcm: lch=%d, status=0x%x\n", lch, ch_status); pr_debug("davinci_pcm: link=%d, status=0x%x\n", link, ch_status);
if (unlikely(ch_status != DMA_COMPLETE)) if (unlikely(ch_status != DMA_COMPLETE))
return; return;
@ -150,15 +150,15 @@ static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
EVENTQ_0); EVENTQ_0);
if (ret < 0) if (ret < 0)
return ret; return ret;
prtd->master_lch = ret; prtd->asp_channel = ret;
/* Request parameter RAM reload slot */ /* Request parameter RAM reload slot */
ret = edma_alloc_slot(EDMA_CTLR(prtd->master_lch), EDMA_SLOT_ANY); ret = edma_alloc_slot(EDMA_CTLR(prtd->asp_channel), EDMA_SLOT_ANY);
if (ret < 0) { if (ret < 0) {
edma_free_channel(prtd->master_lch); edma_free_channel(prtd->asp_channel);
return ret; return ret;
} }
prtd->slave_lch = ret; prtd->asp_link[0] = ret;
/* Issue transfer completion IRQ when the channel completes a /* Issue transfer completion IRQ when the channel completes a
* transfer, then always reload from the same slot (by a kind * transfer, then always reload from the same slot (by a kind
@ -169,10 +169,10 @@ static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
* the buffer and its length (ccnt) ... use it as a template * the buffer and its length (ccnt) ... use it as a template
* so davinci_pcm_enqueue_dma() takes less time in IRQ. * so davinci_pcm_enqueue_dma() takes less time in IRQ.
*/ */
edma_read_slot(prtd->slave_lch, &p_ram); edma_read_slot(prtd->asp_link[0], &p_ram);
p_ram.opt |= TCINTEN | EDMA_TCC(EDMA_CHAN_SLOT(prtd->master_lch)); p_ram.opt |= TCINTEN | EDMA_TCC(EDMA_CHAN_SLOT(prtd->asp_channel));
p_ram.link_bcntrld = EDMA_CHAN_SLOT(prtd->slave_lch) << 5; p_ram.link_bcntrld = EDMA_CHAN_SLOT(prtd->asp_link[0]) << 5;
edma_write_slot(prtd->slave_lch, &p_ram); edma_write_slot(prtd->asp_link[0], &p_ram);
return 0; return 0;
} }
@ -188,12 +188,12 @@ static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
edma_start(prtd->master_lch); edma_start(prtd->asp_channel);
break; break;
case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
edma_stop(prtd->master_lch); edma_stop(prtd->asp_channel);
break; break;
default: default:
ret = -EINVAL; ret = -EINVAL;
@ -214,8 +214,8 @@ static int davinci_pcm_prepare(struct snd_pcm_substream *substream)
davinci_pcm_enqueue_dma(substream); davinci_pcm_enqueue_dma(substream);
/* Copy self-linked parameter RAM entry into master channel */ /* Copy self-linked parameter RAM entry into master channel */
edma_read_slot(prtd->slave_lch, &temp); edma_read_slot(prtd->asp_link[0], &temp);
edma_write_slot(prtd->master_lch, &temp); edma_write_slot(prtd->asp_channel, &temp);
davinci_pcm_enqueue_dma(substream); davinci_pcm_enqueue_dma(substream);
return 0; return 0;
@ -227,20 +227,20 @@ davinci_pcm_pointer(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime; struct snd_pcm_runtime *runtime = substream->runtime;
struct davinci_runtime_data *prtd = runtime->private_data; struct davinci_runtime_data *prtd = runtime->private_data;
unsigned int offset; unsigned int offset;
dma_addr_t count; int asp_count;
dma_addr_t src, dst; dma_addr_t asp_src, asp_dst;
spin_lock(&prtd->lock); spin_lock(&prtd->lock);
edma_get_position(prtd->master_lch, &src, &dst); edma_get_position(prtd->asp_channel, &asp_src, &asp_dst);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
count = src - runtime->dma_addr; asp_count = asp_src - runtime->dma_addr;
else else
count = dst - runtime->dma_addr; asp_count = asp_dst - runtime->dma_addr;
spin_unlock(&prtd->lock); spin_unlock(&prtd->lock);
offset = bytes_to_frames(runtime, count); offset = bytes_to_frames(runtime, asp_count);
if (offset >= runtime->buffer_size) if (offset >= runtime->buffer_size)
offset = 0; offset = 0;
@ -289,10 +289,10 @@ static int davinci_pcm_close(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime; struct snd_pcm_runtime *runtime = substream->runtime;
struct davinci_runtime_data *prtd = runtime->private_data; struct davinci_runtime_data *prtd = runtime->private_data;
edma_unlink(prtd->slave_lch); edma_unlink(prtd->asp_link[0]);
edma_free_slot(prtd->slave_lch); edma_free_slot(prtd->asp_link[0]);
edma_free_channel(prtd->master_lch); edma_free_channel(prtd->asp_channel);
kfree(prtd); kfree(prtd);