diff options
author | Peter Ujfalusi <peter.ujfalusi@nokia.com> | 2009-04-23 13:36:49 +0200 |
---|---|---|
committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-04-23 17:11:17 +0200 |
commit | 8a1f936acdfd53cb0a981f3f80483863dcd84fa9 (patch) | |
tree | 598b788262d3ad53b219dd0bf457c959dfb9c75b /sound/soc/codecs/twl4030.c | |
parent | ASoC: OMAP: Add 4 channel support to mcbsp (diff) | |
download | linux-8a1f936acdfd53cb0a981f3f80483863dcd84fa9.tar.xz linux-8a1f936acdfd53cb0a981f3f80483863dcd84fa9.zip |
ASoC: TWL4030: Add 4 channel TDM support
Support for 4 channel TDM (SND_SOC_DAIFMT_DSP_A) for twl4030
codec.
The channel allocations are:
Playback:
TDM i2s TWL RX
Channel 1 Left SDRL2
Channel 3 Right SDRR2
Channel 2 -- SDRL1
Channel 4 -- SDRR1
Capture:
TDM i2s TWL TX
Channel 1 Left TXL1
Channel 3 Right TXR1
Channel 2 -- TXL2
Channel 4 -- TXR2
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/twl4030.c')
-rw-r--r-- | sound/soc/codecs/twl4030.c | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c index fdf88dfbcff9..e23c20c42f19 100644 --- a/sound/soc/codecs/twl4030.c +++ b/sound/soc/codecs/twl4030.c @@ -1251,6 +1251,28 @@ static void twl4030_constraints(struct twl4030_priv *twl4030, twl4030->channels); } +/* In case of 4 channel mode, the RX1 L/R for playback and the TX2 L/R for + * capture has to be enabled/disabled. */ +static void twl4030_tdm_enable(struct snd_soc_codec *codec, int direction, + int enable) +{ + u8 reg, mask; + + reg = twl4030_read_reg_cache(codec, TWL4030_REG_OPTION); + + if (direction == SNDRV_PCM_STREAM_PLAYBACK) + mask = TWL4030_ARXL1_VRX_EN | TWL4030_ARXR1_EN; + else + mask = TWL4030_ATXL2_VTXL_EN | TWL4030_ATXR2_VTXR_EN; + + if (enable) + reg |= mask; + else + reg &= ~mask; + + twl4030_write(codec, TWL4030_REG_OPTION, reg); +} + static int twl4030_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { @@ -1267,6 +1289,15 @@ static int twl4030_startup(struct snd_pcm_substream *substream, if (twl4030->configured) twl4030_constraints(twl4030, twl4030->master_substream); } else { + if (!(twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE) & + TWL4030_OPTION_1)) { + /* In option2 4 channel is not supported, set the + * constraint for the first stream for channels, the + * second stream will 'inherit' this cosntraint */ + snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_CHANNELS, + 2, 2); + } twl4030->master_substream = substream; } @@ -1292,6 +1323,10 @@ static void twl4030_shutdown(struct snd_pcm_substream *substream, twl4030->configured = 0; else if (!twl4030->master_substream->runtime->channels) twl4030->configured = 0; + + /* If the closing substream had 4 channel, do the necessary cleanup */ + if (substream->runtime->channels == 4) + twl4030_tdm_enable(codec, substream->stream, 0); } static int twl4030_hw_params(struct snd_pcm_substream *substream, @@ -1304,6 +1339,16 @@ static int twl4030_hw_params(struct snd_pcm_substream *substream, struct twl4030_priv *twl4030 = codec->private_data; u8 mode, old_mode, format, old_format; + /* If the substream has 4 channel, do the necessary setup */ + if (params_channels(params) == 4) { + /* Safety check: are we in the correct operating mode? */ + if ((twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE) & + TWL4030_OPTION_1)) + twl4030_tdm_enable(codec, substream->stream, 1); + else + return -EINVAL; + } + if (twl4030->configured) /* Ignoring hw_params for already configured DAI */ return 0; @@ -1461,6 +1506,9 @@ static int twl4030_set_dai_fmt(struct snd_soc_dai *codec_dai, case SND_SOC_DAIFMT_I2S: format |= TWL4030_AIF_FORMAT_CODEC; break; + case SND_SOC_DAIFMT_DSP_A: + format |= TWL4030_AIF_FORMAT_TDM; + break; default: return -EINVAL; } @@ -1642,13 +1690,13 @@ struct snd_soc_dai twl4030_dai[] = { .playback = { .stream_name = "Playback", .channels_min = 2, - .channels_max = 2, + .channels_max = 4, .rates = TWL4030_RATES | SNDRV_PCM_RATE_96000, .formats = TWL4030_FORMATS,}, .capture = { .stream_name = "Capture", .channels_min = 2, - .channels_max = 2, + .channels_max = 4, .rates = TWL4030_RATES, .formats = TWL4030_FORMATS,}, .ops = &twl4030_dai_ops, |