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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>
This commit is contained in:
Daniel Mack 2012-12-05 18:20:37 +01:00 committed by Mark Brown
parent d0c6c482f6
commit ba764b3def
2 changed files with 10 additions and 63 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
sound/soc/davinci/davinci-mcasp.c
View File

@ -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;
u32 fmt;
u32 rotate = (32 - word_length) / 4;
u32 mask = (1ULL << word_length) - 1;
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;
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:

10
sound/soc/davinci/davinci-mcasp.h
View File

@ -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;