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authorDaniel Mack <zonque@gmail.com>2012-12-05 18:20:37 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-12-07 14:47:01 +0900
commitba764b3def0b979fd22884779f1a02f701e3af72 (patch)
tree52e17dfa2480c5056866b88fbdc300b61405aed2 /sound/soc/davinci
parentd0c6c482f6d8c2145717ab0266c87e3e792527ef (diff)
downloadlinux-ba764b3def0b979fd22884779f1a02f701e3af72.tar.bz2
ASoC: McASP: calculate values for channel size
Change davinci_config_channel_size() to derive the values for XSSZ and XROT in DAVINCI_MCASP_[RT]XFMT_REG from the configured word length rather than hard-coding them in a switch/case block. Also, by directly passing the word length to davinci_config_channel_size(), we can get rid of the DAVINCI_AUDIO_WORD_* enum. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/davinci')
-rw-r--r--sound/soc/davinci/davinci-mcasp.c63
-rw-r--r--sound/soc/davinci/davinci-mcasp.h10
2 files changed, 10 insertions, 63 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index 7c248371f7ec..1b0aac9dbf35 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -619,57 +619,14 @@ static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
}
static int davinci_config_channel_size(struct davinci_audio_dev *dev,
- int channel_size)
+ int word_length)
{
- u32 fmt = 0;
- u32 mask, rotate;
-
- switch (channel_size) {
- case DAVINCI_AUDIO_WORD_8:
- fmt = 0x03;
- rotate = 6;
- mask = 0x000000ff;
- break;
-
- case DAVINCI_AUDIO_WORD_12:
- fmt = 0x05;
- rotate = 5;
- mask = 0x00000fff;
- break;
-
- case DAVINCI_AUDIO_WORD_16:
- fmt = 0x07;
- rotate = 4;
- mask = 0x0000ffff;
- break;
-
- case DAVINCI_AUDIO_WORD_20:
- fmt = 0x09;
- rotate = 3;
- mask = 0x000fffff;
- break;
-
- case DAVINCI_AUDIO_WORD_24:
- fmt = 0x0B;
- rotate = 2;
- mask = 0x00ffffff;
- break;
-
- case DAVINCI_AUDIO_WORD_28:
- fmt = 0x0D;
- rotate = 1;
- mask = 0x0fffffff;
- break;
-
- case DAVINCI_AUDIO_WORD_32:
- fmt = 0x0F;
- rotate = 0;
- mask = 0xffffffff;
- break;
+ u32 fmt;
+ u32 rotate = (32 - word_length) / 4;
+ u32 mask = (1ULL << word_length) - 1;
- default:
- return -EINVAL;
- }
+ /* mapping of the XSSZ bit-field as described in the datasheet */
+ fmt = (word_length >> 1) - 1;
mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG,
RXSSZ(fmt), RXSSZ(0x0F));
@@ -856,19 +813,19 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
case SNDRV_PCM_FORMAT_U8:
case SNDRV_PCM_FORMAT_S8:
dma_params->data_type = 1;
- word_length = DAVINCI_AUDIO_WORD_8;
+ word_length = 8;
break;
case SNDRV_PCM_FORMAT_U16_LE:
case SNDRV_PCM_FORMAT_S16_LE:
dma_params->data_type = 2;
- word_length = DAVINCI_AUDIO_WORD_16;
+ word_length = 16;
break;
case SNDRV_PCM_FORMAT_U24_3LE:
case SNDRV_PCM_FORMAT_S24_3LE:
dma_params->data_type = 3;
- word_length = DAVINCI_AUDIO_WORD_24;
+ word_length = 24;
break;
case SNDRV_PCM_FORMAT_U24_LE:
@@ -876,7 +833,7 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
case SNDRV_PCM_FORMAT_U32_LE:
case SNDRV_PCM_FORMAT_S32_LE:
dma_params->data_type = 4;
- word_length = DAVINCI_AUDIO_WORD_32;
+ word_length = 32;
break;
default:
diff --git a/sound/soc/davinci/davinci-mcasp.h b/sound/soc/davinci/davinci-mcasp.h
index a42b5d96739f..d2449a865fc2 100644
--- a/sound/soc/davinci/davinci-mcasp.h
+++ b/sound/soc/davinci/davinci-mcasp.h
@@ -27,16 +27,6 @@
#define DAVINCI_MCASP_I2S_DAI 0
#define DAVINCI_MCASP_DIT_DAI 1
-enum {
- DAVINCI_AUDIO_WORD_8 = 0,
- DAVINCI_AUDIO_WORD_12,
- DAVINCI_AUDIO_WORD_16,
- DAVINCI_AUDIO_WORD_20,
- DAVINCI_AUDIO_WORD_24,
- DAVINCI_AUDIO_WORD_32,
- DAVINCI_AUDIO_WORD_28, /* This is only valid for McASP */
-};
-
struct davinci_audio_dev {
struct davinci_pcm_dma_params dma_params[2];
void __iomem *base;