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ASoC: Samsung: Update DMA interface

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This patch adds to support the DMA PL330 driver that uses
DMA generic API. Samsung sound driver uses DMA generic API
if architecture supports it. Otherwise, use samsung specific
S3C-PL330 API driver to transfer PCM data.

Signed-off-by: Boojin Kim <boojin.kim@samsung.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Cc: Jassi Brar <jassisinghbrar@gmail.com>
Cc: Liam Girdwood <lrg@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
[kgene.kim@samsung.com: removed useless variable]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Boojin Kim 2011-09-02 09:44:43 +09:00 committed by Vinod Koul
parent 82ab8cd7ec
commit 344b4c4888
6 changed files with 77 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/mach-s3c2410/include/mach/dma.h
View File

@ -50,6 +50,11 @@ enum dma_ch {
DMACH_MAX, /* the end entry */
};
static inline bool samsung_dma_has_circular(void)
{
return false;
}
static inline bool samsung_dma_is_dmadev(void)
{
return false;
@ -202,9 +207,4 @@ struct s3c2410_dma_chan {
typedef unsigned long dma_device_t;
static inline bool s3c_dma_has_circular(void)
{
return false;
}
#endif /* __ASM_ARCH_DMA_H */

2
arch/arm/mach-s3c64xx/include/mach/dma.h
View File

@ -58,7 +58,7 @@ enum dma_ch {
DMACH_MAX /* the end */
};
static __inline__ bool s3c_dma_has_circular(void)
static inline bool samsung_dma_has_circular(void)
{
return true;
}

2
arch/arm/plat-samsung/include/plat/dma-pl330.h
View File

@ -89,7 +89,7 @@ struct s3c2410_dma_client {
char *name;
};
static inline bool s3c_dma_has_circular(void)
static inline bool samsung_dma_has_circular(void)
{
return true;
}

10
sound/soc/samsung/ac97.c
View File

@ -271,7 +271,10 @@ static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED);
if (!dma_data->ops)
dma_data->ops = samsung_dma_get_ops();
dma_data->ops->started(dma_data->channel);
return 0;
}
@ -317,7 +320,10 @@ static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,
writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED);
if (!dma_data->ops)
dma_data->ops = samsung_dma_get_ops();
dma_data->ops->started(dma_data->channel);
return 0;
}

144
sound/soc/samsung/dma.c
View File

@ -54,7 +54,6 @@ struct runtime_data {
spinlock_t lock;
int state;
unsigned int dma_loaded;
unsigned int dma_limit;
unsigned int dma_period;
dma_addr_t dma_start;
dma_addr_t dma_pos;
@ -62,77 +61,79 @@ struct runtime_data {
struct s3c_dma_params *params;
};
static void audio_buffdone(void *data);
/* dma_enqueue
*
* place a dma buffer onto the queue for the dma system
* to handle.
*/
*/
static void dma_enqueue(struct snd_pcm_substream *substream)
{
struct runtime_data *prtd = substream->runtime->private_data;
dma_addr_t pos = prtd->dma_pos;
unsigned int limit;
int ret;
struct samsung_dma_prep_info dma_info;
pr_debug("Entered %s\n", __func__);
if (s3c_dma_has_circular())
limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;
else
limit = prtd->dma_limit;
limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;
pr_debug("%s: loaded %d, limit %d\n",
__func__, prtd->dma_loaded, limit);
while (prtd->dma_loaded < limit) {
unsigned long len = prtd->dma_period;
dma_info.cap = (samsung_dma_has_circular() ? DMA_CYCLIC : DMA_SLAVE);
dma_info.direction =
(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
? DMA_TO_DEVICE : DMA_FROM_DEVICE);
dma_info.fp = audio_buffdone;
dma_info.fp_param = substream;
dma_info.period = prtd->dma_period;
dma_info.len = prtd->dma_period*limit;
while (prtd->dma_loaded < limit) {
pr_debug("dma_loaded: %d\n", prtd->dma_loaded);
if ((pos + len) > prtd->dma_end) {
len = prtd->dma_end - pos;
pr_debug("%s: corrected dma len %ld\n", __func__, len);
if ((pos + dma_info.period) > prtd->dma_end) {
dma_info.period = prtd->dma_end - pos;
pr_debug("%s: corrected dma len %ld\n",
__func__, dma_info.period);
}
ret = s3c2410_dma_enqueue(prtd->params->channel,
substream, pos, len);
dma_info.buf = pos;
prtd->params->ops->prepare(prtd->params->ch, &dma_info);
if (ret == 0) {
prtd->dma_loaded++;
pos += prtd->dma_period;
if (pos >= prtd->dma_end)
pos = prtd->dma_start;
} else
break;
prtd->dma_loaded++;
pos += prtd->dma_period;
if (pos >= prtd->dma_end)
pos = prtd->dma_start;
}
prtd->dma_pos = pos;
}
static void audio_buffdone(struct s3c2410_dma_chan *channel,
void *dev_id, int size,
enum s3c2410_dma_buffresult result)
static void audio_buffdone(void *data)
{
struct snd_pcm_substream *substream = dev_id;
struct runtime_data *prtd;
struct snd_pcm_substream *substream = data;
struct runtime_data *prtd = substream->runtime->private_data;
pr_debug("Entered %s\n", __func__);
if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR)
return;
if (prtd->state & ST_RUNNING) {
prtd->dma_pos += prtd->dma_period;
if (prtd->dma_pos >= prtd->dma_end)
prtd->dma_pos = prtd->dma_start;
prtd = substream->runtime->private_data;
if (substream)
snd_pcm_period_elapsed(substream);
if (substream)
snd_pcm_period_elapsed(substream);
spin_lock(&prtd->lock);
if (prtd->state & ST_RUNNING && !s3c_dma_has_circular()) {
prtd->dma_loaded--;
dma_enqueue(substream);
spin_lock(&prtd->lock);
if (!samsung_dma_has_circular()) {
prtd->dma_loaded--;
dma_enqueue(substream);
}
spin_unlock(&prtd->lock);
}
spin_unlock(&prtd->lock);
}
static int dma_hw_params(struct snd_pcm_substream *substream,
@ -144,8 +145,7 @@ static int dma_hw_params(struct snd_pcm_substream *substream,
unsigned long totbytes = params_buffer_bytes(params);
struct s3c_dma_params *dma =
snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
int ret = 0;
struct samsung_dma_info dma_info;
pr_debug("Entered %s\n", __func__);
@ -163,30 +163,26 @@ static int dma_hw_params(struct snd_pcm_substream *substream,
pr_debug("params %p, client %p, channel %d\n", prtd->params,
prtd->params->client, prtd->params->channel);
ret = s3c2410_dma_request(prtd->params->channel,
prtd->params->client, NULL);
prtd->params->ops = samsung_dma_get_ops();
if (ret < 0) {
printk(KERN_ERR "failed to get dma channel\n");
return ret;
}
/* use the circular buffering if we have it available. */
if (s3c_dma_has_circular())
s3c2410_dma_setflags(prtd->params->channel,
S3C2410_DMAF_CIRCULAR);
dma_info.cap = (samsung_dma_has_circular() ?
DMA_CYCLIC : DMA_SLAVE);
dma_info.client = prtd->params->client;
dma_info.direction =
(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
? DMA_TO_DEVICE : DMA_FROM_DEVICE);
dma_info.width = prtd->params->dma_size;
dma_info.fifo = prtd->params->dma_addr;
prtd->params->ch = prtd->params->ops->request(
prtd->params->channel, &dma_info);
}
s3c2410_dma_set_buffdone_fn(prtd->params->channel,
audio_buffdone);
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
runtime->dma_bytes = totbytes;
spin_lock_irq(&prtd->lock);
prtd->dma_loaded = 0;
prtd->dma_limit = runtime->hw.periods_min;
prtd->dma_period = params_period_bytes(params);
prtd->dma_start = runtime->dma_addr;
prtd->dma_pos = prtd->dma_start;
@ -206,7 +202,8 @@ static int dma_hw_free(struct snd_pcm_substream *substream)
snd_pcm_set_runtime_buffer(substream, NULL);
if (prtd->params) {
s3c2410_dma_free(prtd->params->channel, prtd->params->client);
prtd->params->ops->release(prtd->params->ch,
prtd->params->client);
prtd->params = NULL;
}
@ -225,23 +222,9 @@ static int dma_prepare(struct snd_pcm_substream *substream)
if (!prtd->params)
return 0;
/* channel needs configuring for mem=>device, increment memory addr,
* sync to pclk, half-word transfers to the IIS-FIFO. */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
s3c2410_dma_devconfig(prtd->params->channel,
S3C2410_DMASRC_MEM,
prtd->params->dma_addr);
} else {
s3c2410_dma_devconfig(prtd->params->channel,
S3C2410_DMASRC_HW,
prtd->params->dma_addr);
}
s3c2410_dma_config(prtd->params->channel,
prtd->params->dma_size);
/* flush the DMA channel */
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_FLUSH);
prtd->params->ops->flush(prtd->params->ch);
prtd->dma_loaded = 0;
prtd->dma_pos = prtd->dma_start;
@ -265,14 +248,14 @@ static int dma_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
prtd->state |= ST_RUNNING;
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_START);
prtd->params->ops->trigger(prtd->params->ch);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
prtd->state &= ~ST_RUNNING;
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_STOP);
prtd->params->ops->stop(prtd->params->ch);
break;
default:
@ -291,21 +274,12 @@ dma_pointer(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct runtime_data *prtd = runtime->private_data;
unsigned long res;
dma_addr_t src, dst;
pr_debug("Entered %s\n", __func__);
spin_lock(&prtd->lock);
s3c2410_dma_getposition(prtd->params->channel, &src, &dst);
res = prtd->dma_pos - prtd->dma_start;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
res = dst - prtd->dma_start;
else
res = src - prtd->dma_start;
spin_unlock(&prtd->lock);
pr_debug("Pointer %x %x\n", src, dst);
pr_debug("Pointer offset: %lu\n", res);
/* we seem to be getting the odd error from the pcm library due
* to out-of-bounds pointers. this is maybe due to the dma engine

4
sound/soc/samsung/dma.h
View File

@ -6,7 +6,7 @@
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* ALSA PCM interface for the Samsung S3C24xx CPU
* ALSA PCM interface for the Samsung SoC
*/
#ifndef _S3C_AUDIO_H
@ -17,6 +17,8 @@ struct s3c_dma_params {
int channel; /* Channel ID */
dma_addr_t dma_addr;
int dma_size; /* Size of the DMA transfer */
unsigned ch;
struct samsung_dma_ops *ops;
};
#endif