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authorTroy Kisky <troy.kisky@boundarydevices.com>2009-07-04 19:29:57 -0700
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-07-05 12:59:08 +0100
commitf5cfa954e6812c09e3a4b89e8009b22285b860a3 (patch)
treebd271c7a69ba99afbf35c3f96fac62e627705f5a /sound/soc/davinci/davinci-i2s.c
parent9333b594a08f2b2d8b7d96260164817acdbc5cab (diff)
downloadblackbird-op-linux-f5cfa954e6812c09e3a4b89e8009b22285b860a3.tar.gz
blackbird-op-linux-f5cfa954e6812c09e3a4b89e8009b22285b860a3.zip
ASoC: DaVinci: i2s, fix mcbsp_word_length update
Code previously just "ors" in this field without clearing first. Fix, by never reading this register. Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/davinci/davinci-i2s.c')
-rw-r--r--sound/soc/davinci/davinci-i2s.c50
1 files changed, 29 insertions, 21 deletions
diff --git a/sound/soc/davinci/davinci-i2s.c b/sound/soc/davinci/davinci-i2s.c
index 5b31b56e2e92..6fa1b6aebc30 100644
--- a/sound/soc/davinci/davinci-i2s.c
+++ b/sound/soc/davinci/davinci-i2s.c
@@ -63,6 +63,7 @@
#define DAVINCI_MCBSP_RCR_RWDLEN1(v) ((v) << 5)
#define DAVINCI_MCBSP_RCR_RFRLEN1(v) ((v) << 8)
#define DAVINCI_MCBSP_RCR_RDATDLY(v) ((v) << 16)
+#define DAVINCI_MCBSP_RCR_RFIG (1 << 18)
#define DAVINCI_MCBSP_RCR_RWDLEN2(v) ((v) << 21)
#define DAVINCI_MCBSP_XCR_XWDLEN1(v) ((v) << 5)
@@ -104,6 +105,9 @@ static struct davinci_pcm_dma_params davinci_i2s_pcm_in = {
struct davinci_mcbsp_dev {
void __iomem *base;
+#define MOD_DSP_A 0
+#define MOD_DSP_B 1
+ int mode;
u32 pcr;
struct clk *clk;
struct davinci_pcm_dma_params *dma_params[2];
@@ -225,12 +229,11 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
struct davinci_mcbsp_dev *dev = cpu_dai->private_data;
unsigned int pcr;
unsigned int srgr;
- unsigned int rcr;
- unsigned int xcr;
srgr = DAVINCI_MCBSP_SRGR_FSGM |
DAVINCI_MCBSP_SRGR_FPER(DEFAULT_BITPERSAMPLE * 2 - 1) |
DAVINCI_MCBSP_SRGR_FWID(DEFAULT_BITPERSAMPLE - 1);
+ /* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
/* cpu is master */
@@ -255,11 +258,8 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
return -EINVAL;
}
- rcr = DAVINCI_MCBSP_RCR_RFRLEN1(1);
- xcr = DAVINCI_MCBSP_XCR_XFIG | DAVINCI_MCBSP_XCR_XFRLEN1(1);
+ /* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
- case SND_SOC_DAIFMT_DSP_B:
- break;
case SND_SOC_DAIFMT_I2S:
/* Davinci doesn't support TRUE I2S, but some codecs will have
* the left and right channels contiguous. This allows
@@ -279,8 +279,10 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
*/
fmt ^= SND_SOC_DAIFMT_NB_IF;
case SND_SOC_DAIFMT_DSP_A:
- rcr |= DAVINCI_MCBSP_RCR_RDATDLY(1);
- xcr |= DAVINCI_MCBSP_XCR_XDATDLY(1);
+ dev->mode = MOD_DSP_A;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ dev->mode = MOD_DSP_B;
break;
default:
printk(KERN_ERR "%s:bad format\n", __func__);
@@ -342,8 +344,6 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, srgr);
dev->pcr = pcr;
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, pcr);
- davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, rcr);
- davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, xcr);
return 0;
}
@@ -377,6 +377,15 @@ static int davinci_i2s_hw_params(struct snd_pcm_substream *substream,
srgr |= DAVINCI_MCBSP_SRGR_FPER(snd_interval_value(i) - 1);
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, srgr);
+ rcr = DAVINCI_MCBSP_RCR_RFIG;
+ xcr = DAVINCI_MCBSP_XCR_XFIG;
+ if (dev->mode == MOD_DSP_B) {
+ rcr |= DAVINCI_MCBSP_RCR_RDATDLY(0);
+ xcr |= DAVINCI_MCBSP_XCR_XDATDLY(0);
+ } else {
+ rcr |= DAVINCI_MCBSP_RCR_RDATDLY(1);
+ xcr |= DAVINCI_MCBSP_XCR_XDATDLY(1);
+ }
/* Determine xfer data type */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
@@ -396,19 +405,18 @@ static int davinci_i2s_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
- if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
- rcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_RCR_REG);
- rcr |= DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) |
- DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length);
- davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, rcr);
+ rcr |= DAVINCI_MCBSP_RCR_RFRLEN1(1);
+ xcr |= DAVINCI_MCBSP_XCR_XFRLEN1(1);
- } else {
- xcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_XCR_REG);
- xcr |= DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) |
- DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length);
- davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, xcr);
+ rcr |= DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) |
+ DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length);
+ xcr |= DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) |
+ DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length);
- }
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, xcr);
+ else
+ davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, rcr);
return 0;
}
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