diff options
Diffstat (limited to 'sound/soc/intel/atom/sst-atom-controls.c')
| -rw-r--r-- | sound/soc/intel/atom/sst-atom-controls.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/sound/soc/intel/atom/sst-atom-controls.c b/sound/soc/intel/atom/sst-atom-controls.c index 93c6c8b5fbc6..e024d98948fa 100644 --- a/sound/soc/intel/atom/sst-atom-controls.c +++ b/sound/soc/intel/atom/sst-atom-controls.c @@ -774,8 +774,107 @@ int sst_handle_vb_timer(struct snd_soc_dai *dai, bool enable) return ret; } +static int sst_get_frame_sync_polarity(struct snd_soc_dai *dai, + unsigned int fmt) +{ + int format; + + format = fmt & SND_SOC_DAIFMT_INV_MASK; + dev_dbg(dai->dev, "Enter:%s, format=%x\n", __func__, format); + + switch (format) { + case SND_SOC_DAIFMT_NB_NF: + return SSP_FS_ACTIVE_LOW; + case SND_SOC_DAIFMT_NB_IF: + return SSP_FS_ACTIVE_HIGH; + case SND_SOC_DAIFMT_IB_IF: + return SSP_FS_ACTIVE_LOW; + case SND_SOC_DAIFMT_IB_NF: + return SSP_FS_ACTIVE_HIGH; + default: + dev_err(dai->dev, "Invalid frame sync polarity %d\n", format); + } + + return -EINVAL; +} + +static int sst_get_ssp_mode(struct snd_soc_dai *dai, unsigned int fmt) +{ + int format; + + format = (fmt & SND_SOC_DAIFMT_MASTER_MASK); + dev_dbg(dai->dev, "Enter:%s, format=%x\n", __func__, format); + + switch (format) { + case SND_SOC_DAIFMT_CBS_CFS: + return SSP_MODE_MASTER; + case SND_SOC_DAIFMT_CBM_CFM: + return SSP_MODE_SLAVE; + default: + dev_err(dai->dev, "Invalid ssp protocol: %d\n", format); + } + + return -EINVAL; +} + + +int sst_fill_ssp_config(struct snd_soc_dai *dai, unsigned int fmt) +{ + unsigned int mode; + int fs_polarity; + struct sst_data *ctx = snd_soc_dai_get_drvdata(dai); + + mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK; + + switch (mode) { + case SND_SOC_DAIFMT_DSP_B: + ctx->ssp_cmd.ssp_protocol = SSP_MODE_PCM; + ctx->ssp_cmd.mode = sst_get_ssp_mode(dai, fmt) | (SSP_PCM_MODE_NETWORK << 1); + ctx->ssp_cmd.start_delay = 0; + ctx->ssp_cmd.data_polarity = 1; + ctx->ssp_cmd.frame_sync_width = 1; + break; + + case SND_SOC_DAIFMT_DSP_A: + ctx->ssp_cmd.ssp_protocol = SSP_MODE_PCM; + ctx->ssp_cmd.mode = sst_get_ssp_mode(dai, fmt) | (SSP_PCM_MODE_NETWORK << 1); + ctx->ssp_cmd.start_delay = 1; + ctx->ssp_cmd.data_polarity = 1; + ctx->ssp_cmd.frame_sync_width = 1; + break; + + case SND_SOC_DAIFMT_I2S: + ctx->ssp_cmd.ssp_protocol = SSP_MODE_I2S; + ctx->ssp_cmd.mode = sst_get_ssp_mode(dai, fmt) | (SSP_PCM_MODE_NORMAL << 1); + ctx->ssp_cmd.start_delay = 1; + ctx->ssp_cmd.data_polarity = 0; + ctx->ssp_cmd.frame_sync_width = ctx->ssp_cmd.nb_bits_per_slots; + break; + + case SND_SOC_DAIFMT_LEFT_J: + ctx->ssp_cmd.ssp_protocol = SSP_MODE_I2S; + ctx->ssp_cmd.mode = sst_get_ssp_mode(dai, fmt) | (SSP_PCM_MODE_NORMAL << 1); + ctx->ssp_cmd.start_delay = 0; + ctx->ssp_cmd.data_polarity = 0; + ctx->ssp_cmd.frame_sync_width = ctx->ssp_cmd.nb_bits_per_slots; + break; + + default: + dev_dbg(dai->dev, "using default ssp configs\n"); + } + + fs_polarity = sst_get_frame_sync_polarity(dai, fmt); + if (fs_polarity < 0) + return fs_polarity; + + ctx->ssp_cmd.frame_sync_polarity = fs_polarity; + + return 0; +} + /** * sst_ssp_config - contains SSP configuration for media UC + * this can be overwritten by set_dai_xxx APIs */ static const struct sst_ssp_config sst_ssp_configs = { .ssp_id = SSP_CODEC, |