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yaml
---
r: 262026
b: refs/heads/master
c: a103fc6
h: refs/heads/master
v: v3
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Mika Westerberg authored and Vinod Koul committed Jun 6, 2011
1 parent 2815c8c commit 9a7722a
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Showing 4 changed files with 82 additions and 65 deletions.
2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: f911d026e84a137e35701a4f23732f47ce40a6b8
refs/heads/master: a103fc67c612bfc0f6388885fea7244967afaad4
4 changes: 2 additions & 2 deletions trunk/sound/soc/ep93xx/ep93xx-ac97.c
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Expand Up @@ -106,12 +106,12 @@ static struct ep93xx_ac97_info *ep93xx_ac97_info;

static struct ep93xx_pcm_dma_params ep93xx_ac97_pcm_out = {
.name = "ac97-pcm-out",
.dma_port = EP93XX_DMA_M2P_PORT_AAC1,
.dma_port = EP93XX_DMA_AAC1,
};

static struct ep93xx_pcm_dma_params ep93xx_ac97_pcm_in = {
.name = "ac97-pcm-in",
.dma_port = EP93XX_DMA_M2P_PORT_AAC1,
.dma_port = EP93XX_DMA_AAC1,
};

static inline unsigned ep93xx_ac97_read_reg(struct ep93xx_ac97_info *info,
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4 changes: 2 additions & 2 deletions trunk/sound/soc/ep93xx/ep93xx-i2s.c
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Expand Up @@ -70,11 +70,11 @@ struct ep93xx_i2s_info {
struct ep93xx_pcm_dma_params ep93xx_i2s_dma_params[] = {
[SNDRV_PCM_STREAM_PLAYBACK] = {
.name = "i2s-pcm-out",
.dma_port = EP93XX_DMA_M2P_PORT_I2S1,
.dma_port = EP93XX_DMA_I2S1,
},
[SNDRV_PCM_STREAM_CAPTURE] = {
.name = "i2s-pcm-in",
.dma_port = EP93XX_DMA_M2P_PORT_I2S1,
.dma_port = EP93XX_DMA_I2S1,
},
};

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137 changes: 77 additions & 60 deletions trunk/sound/soc/ep93xx/ep93xx-pcm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
#include <linux/init.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>

#include <sound/core.h>
Expand Down Expand Up @@ -53,43 +54,34 @@ static const struct snd_pcm_hardware ep93xx_pcm_hardware = {

struct ep93xx_runtime_data
{
struct ep93xx_dma_m2p_client cl;
struct ep93xx_pcm_dma_params *params;
int pointer_bytes;
struct tasklet_struct period_tasklet;
int periods;
struct ep93xx_dma_buffer buf[32];
int period_bytes;
struct dma_chan *dma_chan;
struct ep93xx_dma_data dma_data;
};

static void ep93xx_pcm_period_elapsed(unsigned long data)
static void ep93xx_pcm_dma_callback(void *data)
{
struct snd_pcm_substream *substream = (struct snd_pcm_substream *)data;
snd_pcm_period_elapsed(substream);
}
struct snd_pcm_substream *substream = data;
struct ep93xx_runtime_data *rtd = substream->runtime->private_data;

static void ep93xx_pcm_buffer_started(void *cookie,
struct ep93xx_dma_buffer *buf)
{
rtd->pointer_bytes += rtd->period_bytes;
rtd->pointer_bytes %= rtd->period_bytes * rtd->periods;

snd_pcm_period_elapsed(substream);
}

static void ep93xx_pcm_buffer_finished(void *cookie,
struct ep93xx_dma_buffer *buf,
int bytes, int error)
static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
{
struct snd_pcm_substream *substream = cookie;
struct ep93xx_runtime_data *rtd = substream->runtime->private_data;

if (buf == rtd->buf + rtd->periods - 1)
rtd->pointer_bytes = 0;
else
rtd->pointer_bytes += buf->size;
struct ep93xx_dma_data *data = filter_param;

if (!error) {
ep93xx_dma_m2p_submit_recursive(&rtd->cl, buf);
tasklet_schedule(&rtd->period_tasklet);
} else {
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
if (data->direction == ep93xx_dma_chan_direction(chan)) {
chan->private = data;
return true;
}

return false;
}

static int ep93xx_pcm_open(struct snd_pcm_substream *substream)
Expand All @@ -98,30 +90,38 @@ static int ep93xx_pcm_open(struct snd_pcm_substream *substream)
struct snd_soc_dai *cpu_dai = soc_rtd->cpu_dai;
struct ep93xx_pcm_dma_params *dma_params;
struct ep93xx_runtime_data *rtd;
dma_cap_mask_t mask;
int ret;

dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream);
ret = snd_pcm_hw_constraint_integer(substream->runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
return ret;

snd_soc_set_runtime_hwparams(substream, &ep93xx_pcm_hardware);

rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
if (!rtd)
return -ENOMEM;

memset(&rtd->period_tasklet, 0, sizeof(rtd->period_tasklet));
rtd->period_tasklet.func = ep93xx_pcm_period_elapsed;
rtd->period_tasklet.data = (unsigned long)substream;

rtd->cl.name = dma_params->name;
rtd->cl.flags = dma_params->dma_port | EP93XX_DMA_M2P_IGNORE_ERROR |
((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
EP93XX_DMA_M2P_TX : EP93XX_DMA_M2P_RX);
rtd->cl.cookie = substream;
rtd->cl.buffer_started = ep93xx_pcm_buffer_started;
rtd->cl.buffer_finished = ep93xx_pcm_buffer_finished;
ret = ep93xx_dma_m2p_client_register(&rtd->cl);
if (ret < 0) {
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dma_cap_set(DMA_CYCLIC, mask);

dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream);
rtd->dma_data.port = dma_params->dma_port;
rtd->dma_data.name = dma_params->name;

if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
rtd->dma_data.direction = DMA_TO_DEVICE;
else
rtd->dma_data.direction = DMA_FROM_DEVICE;

rtd->dma_chan = dma_request_channel(mask, ep93xx_pcm_dma_filter,
&rtd->dma_data);
if (!rtd->dma_chan) {
kfree(rtd);
return ret;
return -EINVAL;
}

substream->runtime->private_data = rtd;
Expand All @@ -132,31 +132,52 @@ static int ep93xx_pcm_close(struct snd_pcm_substream *substream)
{
struct ep93xx_runtime_data *rtd = substream->runtime->private_data;

ep93xx_dma_m2p_client_unregister(&rtd->cl);
dma_release_channel(rtd->dma_chan);
kfree(rtd);
return 0;
}

static int ep93xx_pcm_dma_submit(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct ep93xx_runtime_data *rtd = runtime->private_data;
struct dma_chan *chan = rtd->dma_chan;
struct dma_device *dma_dev = chan->device;
struct dma_async_tx_descriptor *desc;

rtd->pointer_bytes = 0;
desc = dma_dev->device_prep_dma_cyclic(chan, runtime->dma_addr,
rtd->period_bytes * rtd->periods,
rtd->period_bytes,
rtd->dma_data.direction);
if (!desc)
return -EINVAL;

desc->callback = ep93xx_pcm_dma_callback;
desc->callback_param = substream;

dmaengine_submit(desc);
return 0;
}

static void ep93xx_pcm_dma_flush(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct ep93xx_runtime_data *rtd = runtime->private_data;

dmaengine_terminate_all(rtd->dma_chan);
}

static int ep93xx_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct ep93xx_runtime_data *rtd = runtime->private_data;
size_t totsize = params_buffer_bytes(params);
size_t period = params_period_bytes(params);
int i;

snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
runtime->dma_bytes = totsize;

rtd->periods = (totsize + period - 1) / period;
for (i = 0; i < rtd->periods; i++) {
rtd->buf[i].bus_addr = runtime->dma_addr + (i * period);
rtd->buf[i].size = period;
if ((i + 1) * period > totsize)
rtd->buf[i].size = totsize - (i * period);
}

rtd->periods = params_periods(params);
rtd->period_bytes = params_period_bytes(params);
return 0;
}

Expand All @@ -168,24 +189,20 @@ static int ep93xx_pcm_hw_free(struct snd_pcm_substream *substream)

static int ep93xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
int ret;
int i;

ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
rtd->pointer_bytes = 0;
for (i = 0; i < rtd->periods; i++)
ep93xx_dma_m2p_submit(&rtd->cl, rtd->buf + i);
ret = ep93xx_pcm_dma_submit(substream);
break;

case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ep93xx_dma_m2p_flush(&rtd->cl);
ep93xx_pcm_dma_flush(substream);
break;

default:
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