[alsa-devel] [PATCH] ASoC: davinci-pcm: trivial: replace link with actual chan/link
Ben Gardiner
bengardiner at nanometrics.ca
Fri Sep 9 23:06:05 CEST 2011
The ambiguously named variable 'link' is used as a temporary throughout
davinci-pcm -- its presence makes grepping (and groking) the code
difficult.
Replace link with the value of link in almost all sites. The exception
is a couple places where the last-assigned link/chan needs to be
returned by a function -- in these cases, rename to last_link.
Signed-off-by: Ben Gardiner <bengardiner at nanometrics.ca>
---
sound/soc/davinci/davinci-pcm.c | 123 +++++++++++++++++++--------------------
1 files changed, 59 insertions(+), 64 deletions(-)
diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c
index a49e667..d5fe08c 100644
--- a/sound/soc/davinci/davinci-pcm.c
+++ b/sound/soc/davinci/davinci-pcm.c
@@ -180,7 +180,6 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
{
struct davinci_runtime_data *prtd = substream->runtime->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
- int link = prtd->asp_link[0];
unsigned int period_size;
unsigned int dma_offset;
dma_addr_t dma_pos;
@@ -198,7 +197,8 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
fifo_level = prtd->params->fifo_level;
pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d "
- "dma_ptr = %x period_size=%x\n", link, dma_pos, period_size);
+ "dma_ptr = %x period_size=%x\n", prtd->asp_link[0], dma_pos,
+ period_size);
data_type = prtd->params->data_type;
count = period_size / data_type;
@@ -222,17 +222,19 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
}
acnt = prtd->params->acnt;
- edma_set_src(link, src, INCR, W8BIT);
- edma_set_dest(link, dst, INCR, W8BIT);
+ edma_set_src(prtd->asp_link[0], src, INCR, W8BIT);
+ edma_set_dest(prtd->asp_link[0], dst, INCR, W8BIT);
- edma_set_src_index(link, src_bidx, src_cidx);
- edma_set_dest_index(link, dst_bidx, dst_cidx);
+ edma_set_src_index(prtd->asp_link[0], src_bidx, src_cidx);
+ edma_set_dest_index(prtd->asp_link[0], dst_bidx, dst_cidx);
if (!fifo_level)
- edma_set_transfer_params(link, acnt, count, 1, 0, ASYNC);
+ edma_set_transfer_params(prtd->asp_link[0], acnt, count, 1, 0,
+ ASYNC);
else
- edma_set_transfer_params(link, acnt, fifo_level, count,
- fifo_level, ABSYNC);
+ edma_set_transfer_params(prtd->asp_link[0], acnt, fifo_level,
+ count, fifo_level,
+ ABSYNC);
}
static void davinci_pcm_dma_irq(unsigned link, u16 ch_status, void *data)
@@ -305,7 +307,6 @@ static int ping_pong_dma_setup(struct snd_pcm_substream *substream)
unsigned int acnt = params->acnt;
/* divide by 2 for ping/pong */
unsigned int ping_size = snd_pcm_lib_period_bytes(substream) >> 1;
- int link = prtd->asp_link[1];
unsigned int fifo_level = prtd->params->fifo_level;
unsigned int count;
if ((data_type == 0) || (data_type > 4)) {
@@ -316,28 +317,26 @@ static int ping_pong_dma_setup(struct snd_pcm_substream *substream)
dma_addr_t asp_src_pong = iram_dma->addr + ping_size;
ram_src_cidx = ping_size;
ram_dst_cidx = -ping_size;
- edma_set_src(link, asp_src_pong, INCR, W8BIT);
+ edma_set_src(prtd->asp_link[1], asp_src_pong, INCR, W8BIT);
- link = prtd->asp_link[0];
- edma_set_src_index(link, data_type, data_type * fifo_level);
- link = prtd->asp_link[1];
- edma_set_src_index(link, data_type, data_type * fifo_level);
+ edma_set_src_index(prtd->asp_link[0], data_type,
+ data_type * fifo_level);
+ edma_set_src_index(prtd->asp_link[1], data_type,
+ data_type * fifo_level);
- link = prtd->ram_link;
- edma_set_src(link, runtime->dma_addr, INCR, W32BIT);
+ edma_set_src(prtd->ram_link, runtime->dma_addr, INCR, W32BIT);
} else {
dma_addr_t asp_dst_pong = iram_dma->addr + ping_size;
ram_src_cidx = -ping_size;
ram_dst_cidx = ping_size;
- edma_set_dest(link, asp_dst_pong, INCR, W8BIT);
+ edma_set_dest(prtd->asp_link[1], asp_dst_pong, INCR, W8BIT);
- link = prtd->asp_link[0];
- edma_set_dest_index(link, data_type, data_type * fifo_level);
- link = prtd->asp_link[1];
- edma_set_dest_index(link, data_type, data_type * fifo_level);
+ edma_set_dest_index(prtd->asp_link[0], data_type,
+ data_type * fifo_level);
+ edma_set_dest_index(prtd->asp_link[1], data_type,
+ data_type * fifo_level);
- link = prtd->ram_link;
- edma_set_dest(link, runtime->dma_addr, INCR, W32BIT);
+ edma_set_dest(prtd->ram_link, runtime->dma_addr, INCR, W32BIT);
}
if (!fifo_level) {
@@ -354,10 +353,9 @@ static int ping_pong_dma_setup(struct snd_pcm_substream *substream)
count, fifo_level, ABSYNC);
}
- link = prtd->ram_link;
- edma_set_src_index(link, ping_size, ram_src_cidx);
- edma_set_dest_index(link, ping_size, ram_dst_cidx);
- edma_set_transfer_params(link, ping_size, 2,
+ edma_set_src_index(prtd->ram_link, ping_size, ram_src_cidx);
+ edma_set_dest_index(prtd->ram_link, ping_size, ram_dst_cidx);
+ edma_set_transfer_params(prtd->ram_link, ping_size, 2,
runtime->periods, 2, ASYNC);
/* init master params */
@@ -406,32 +404,32 @@ static int request_ping_pong(struct snd_pcm_substream *substream,
{
dma_addr_t asp_src_ping;
dma_addr_t asp_dst_ping;
- int link;
+ int ret;
struct davinci_pcm_dma_params *params = prtd->params;
/* Request ram master channel */
- link = prtd->ram_channel = edma_alloc_channel(EDMA_CHANNEL_ANY,
+ ret = prtd->ram_channel = edma_alloc_channel(EDMA_CHANNEL_ANY,
davinci_pcm_dma_irq, substream,
prtd->params->ram_chan_q);
- if (link < 0)
+ if (ret < 0)
goto exit1;
/* Request ram link channel */
- link = prtd->ram_link = edma_alloc_slot(
+ ret = prtd->ram_link = edma_alloc_slot(
EDMA_CTLR(prtd->ram_channel), EDMA_SLOT_ANY);
- if (link < 0)
+ if (ret < 0)
goto exit2;
- link = prtd->asp_link[1] = edma_alloc_slot(
+ ret = prtd->asp_link[1] = edma_alloc_slot(
EDMA_CTLR(prtd->asp_channel), EDMA_SLOT_ANY);
- if (link < 0)
+ if (ret < 0)
goto exit3;
prtd->ram_link2 = -1;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- link = prtd->ram_link2 = edma_alloc_slot(
+ ret = prtd->ram_link2 = edma_alloc_slot(
EDMA_CTLR(prtd->ram_channel), EDMA_SLOT_ANY);
- if (link < 0)
+ if (ret < 0)
goto exit4;
}
/* circle ping-pong buffers */
@@ -448,36 +446,33 @@ static int request_ping_pong(struct snd_pcm_substream *substream,
asp_dst_ping = iram_dma->addr;
}
/* ping */
- link = prtd->asp_link[0];
- edma_set_src(link, asp_src_ping, INCR, W16BIT);
- edma_set_dest(link, asp_dst_ping, INCR, W16BIT);
- edma_set_src_index(link, 0, 0);
- edma_set_dest_index(link, 0, 0);
+ edma_set_src(prtd->asp_link[0], asp_src_ping, INCR, W16BIT);
+ edma_set_dest(prtd->asp_link[0], asp_dst_ping, INCR, W16BIT);
+ edma_set_src_index(prtd->asp_link[0], 0, 0);
+ edma_set_dest_index(prtd->asp_link[0], 0, 0);
- edma_read_slot(link, &prtd->asp_params);
+ edma_read_slot(prtd->asp_link[0], &prtd->asp_params);
prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f) | TCINTEN);
prtd->asp_params.opt |= TCCHEN |
EDMA_TCC(prtd->ram_channel & 0x3f);
- edma_write_slot(link, &prtd->asp_params);
+ edma_write_slot(prtd->asp_link[0], &prtd->asp_params);
/* pong */
- link = prtd->asp_link[1];
- edma_set_src(link, asp_src_ping, INCR, W16BIT);
- edma_set_dest(link, asp_dst_ping, INCR, W16BIT);
- edma_set_src_index(link, 0, 0);
- edma_set_dest_index(link, 0, 0);
+ edma_set_src(prtd->asp_link[1], asp_src_ping, INCR, W16BIT);
+ edma_set_dest(prtd->asp_link[1], asp_dst_ping, INCR, W16BIT);
+ edma_set_src_index(prtd->asp_link[1], 0, 0);
+ edma_set_dest_index(prtd->asp_link[1], 0, 0);
- edma_read_slot(link, &prtd->asp_params);
+ edma_read_slot(prtd->asp_link[1], &prtd->asp_params);
prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f));
/* interrupt after every pong completion */
prtd->asp_params.opt |= TCINTEN | TCCHEN |
EDMA_TCC(prtd->ram_channel & 0x3f);
- edma_write_slot(link, &prtd->asp_params);
+ edma_write_slot(prtd->asp_link[1], &prtd->asp_params);
/* ram */
- link = prtd->ram_link;
- edma_set_src(link, iram_dma->addr, INCR, W32BIT);
- edma_set_dest(link, iram_dma->addr, INCR, W32BIT);
+ edma_set_src(prtd->ram_link, iram_dma->addr, INCR, W32BIT);
+ edma_set_dest(prtd->ram_link, iram_dma->addr, INCR, W32BIT);
pr_debug("%s: audio dma channels/slots in use for ram:%u %u %u,"
"for asp:%u %u %u\n", __func__,
prtd->ram_channel, prtd->ram_link, prtd->ram_link2,
@@ -494,7 +489,7 @@ exit2:
edma_free_channel(prtd->ram_channel);
prtd->ram_channel = -1;
exit1:
- return link;
+ return ret;
}
static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
@@ -502,22 +497,22 @@ static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
struct snd_dma_buffer *iram_dma;
struct davinci_runtime_data *prtd = substream->runtime->private_data;
struct davinci_pcm_dma_params *params = prtd->params;
- int link;
+ int ret;
if (!params)
return -ENODEV;
/* Request asp master DMA channel */
- link = prtd->asp_channel = edma_alloc_channel(params->channel,
+ ret = prtd->asp_channel = edma_alloc_channel(params->channel,
davinci_pcm_dma_irq, substream,
prtd->params->asp_chan_q);
- if (link < 0)
+ if (ret < 0)
goto exit1;
/* Request asp link channels */
- link = prtd->asp_link[0] = edma_alloc_slot(
+ ret = prtd->asp_link[0] = edma_alloc_slot(
EDMA_CTLR(prtd->asp_channel), EDMA_SLOT_ANY);
- if (link < 0)
+ if (ret < 0)
goto exit2;
iram_dma = (struct snd_dma_buffer *)substream->dma_buffer.private_data;
@@ -537,17 +532,17 @@ static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
* the buffer and its length (ccnt) ... use it as a template
* so davinci_pcm_enqueue_dma() takes less time in IRQ.
*/
- edma_read_slot(link, &prtd->asp_params);
+ edma_read_slot(prtd->asp_link[0], &prtd->asp_params);
prtd->asp_params.opt |= TCINTEN |
EDMA_TCC(EDMA_CHAN_SLOT(prtd->asp_channel));
- prtd->asp_params.link_bcntrld = EDMA_CHAN_SLOT(link) << 5;
- edma_write_slot(link, &prtd->asp_params);
+ prtd->asp_params.link_bcntrld = EDMA_CHAN_SLOT(prtd->asp_link[0]) << 5;
+ edma_write_slot(prtd->asp_link[0], &prtd->asp_params);
return 0;
exit2:
edma_free_channel(prtd->asp_channel);
prtd->asp_channel = -1;
exit1:
- return link;
+ return ret;
}
static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
--
1.7.4.1
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