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authorChaithrika U S <chaithrika@ti.com>2009-09-30 17:32:27 -0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-09-30 13:43:55 +0100
commit4fa9c1a5953441e06dbde7b6a655cbf6618e61dd (patch)
tree661628c2ba19c95bdb3dc4ecb26bb1a405e78ea8 /sound/soc/davinci
parentbe2500b8353d41463399e997fe8562f772dcaaba (diff)
downloadlinux-4fa9c1a5953441e06dbde7b6a655cbf6618e61dd.tar.bz2
ASoC: DaVinci: McASP FIFO related updates
The DMA params for McASP with FIFO has been updated so that it works for various FIFO levels. A member- 'fifo_level' has been added to the DMA params data structure. The fifo_level can be adjusted by the tx[rx]_numevt platform data. This is relevant only for DA8xx/OMAP-L1xx platforms. This implementation has been tested for numevt values 1, 2, 4, 8. Signed-off-by: Chaithrika U S <chaithrika@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/davinci')
-rw-r--r--sound/soc/davinci/davinci-i2s.c2
-rw-r--r--sound/soc/davinci/davinci-mcasp.c17
-rw-r--r--sound/soc/davinci/davinci-pcm.c21
-rw-r--r--sound/soc/davinci/davinci-pcm.h1
4 files changed, 28 insertions, 13 deletions
diff --git a/sound/soc/davinci/davinci-i2s.c b/sound/soc/davinci/davinci-i2s.c
index 4ae707048021..2ab809359c08 100644
--- a/sound/soc/davinci/davinci-i2s.c
+++ b/sound/soc/davinci/davinci-i2s.c
@@ -397,6 +397,8 @@ static int davinci_i2s_hw_params(struct snd_pcm_substream *substream,
}
dma_params->acnt = dma_params->data_type;
+ dma_params->fifo_level = 0;
+
rcr |= DAVINCI_MCBSP_RCR_RFRLEN1(1);
xcr |= DAVINCI_MCBSP_XCR_XFRLEN1(1);
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index 5d1f98a4c978..50ad0519a8fa 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -714,16 +714,13 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
struct davinci_pcm_dma_params *dma_params =
&dev->dma_params[substream->stream];
int word_length;
- u8 numevt;
+ u8 fifo_level;
davinci_hw_common_param(dev, substream->stream);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- numevt = dev->txnumevt;
+ fifo_level = dev->txnumevt;
else
- numevt = dev->rxnumevt;
-
- if (!numevt)
- numevt = 1;
+ fifo_level = dev->rxnumevt;
if (dev->op_mode == DAVINCI_MCASP_DIT_MODE)
davinci_hw_dit_param(dev);
@@ -751,12 +748,12 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
- if (dev->version == MCASP_VERSION_2) {
- dma_params->data_type *= numevt;
- dma_params->acnt = 4 * numevt;
- } else
+ if (dev->version == MCASP_VERSION_2 && !fifo_level)
+ dma_params->acnt = 4;
+ else
dma_params->acnt = dma_params->data_type;
+ dma_params->fifo_level = fifo_level;
davinci_config_channel_size(dev, word_length);
return 0;
diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c
index 359e99ec7244..1152d8ba8970 100644
--- a/sound/soc/davinci/davinci-pcm.c
+++ b/sound/soc/davinci/davinci-pcm.c
@@ -66,38 +66,53 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
dma_addr_t dma_pos;
dma_addr_t src, dst;
unsigned short src_bidx, dst_bidx;
+ unsigned short src_cidx, dst_cidx;
unsigned int data_type;
unsigned short acnt;
unsigned int count;
+ unsigned int fifo_level;
period_size = snd_pcm_lib_period_bytes(substream);
dma_offset = prtd->period * period_size;
dma_pos = runtime->dma_addr + dma_offset;
+ fifo_level = prtd->params->fifo_level;
pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d "
"dma_ptr = %x period_size=%x\n", lch, dma_pos, period_size);
data_type = prtd->params->data_type;
count = period_size / data_type;
+ if (fifo_level)
+ count /= fifo_level;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
src = dma_pos;
dst = prtd->params->dma_addr;
src_bidx = data_type;
dst_bidx = 0;
+ src_cidx = data_type * fifo_level;
+ dst_cidx = 0;
} else {
src = prtd->params->dma_addr;
dst = dma_pos;
src_bidx = 0;
dst_bidx = data_type;
+ src_cidx = 0;
+ dst_cidx = data_type * fifo_level;
}
acnt = prtd->params->acnt;
edma_set_src(lch, src, INCR, W8BIT);
edma_set_dest(lch, dst, INCR, W8BIT);
- edma_set_src_index(lch, src_bidx, 0);
- edma_set_dest_index(lch, dst_bidx, 0);
- edma_set_transfer_params(lch, acnt, count, 1, 0, ASYNC);
+
+ edma_set_src_index(lch, src_bidx, src_cidx);
+ edma_set_dest_index(lch, dst_bidx, dst_cidx);
+
+ if (!fifo_level)
+ edma_set_transfer_params(lch, acnt, count, 1, 0, ASYNC);
+ else
+ edma_set_transfer_params(lch, acnt, fifo_level, count,
+ fifo_level, ABSYNC);
prtd->period++;
if (unlikely(prtd->period >= runtime->periods))
diff --git a/sound/soc/davinci/davinci-pcm.h b/sound/soc/davinci/davinci-pcm.h
index 8746606efc89..c8b0d2baf05a 100644
--- a/sound/soc/davinci/davinci-pcm.h
+++ b/sound/soc/davinci/davinci-pcm.h
@@ -23,6 +23,7 @@ struct davinci_pcm_dma_params {
enum dma_event_q eventq_no; /* event queue number */
unsigned char data_type; /* xfer data type */
unsigned char convert_mono_stereo;
+ unsigned int fifo_level;
};