Signed-off-by: Ryan Lee <ryans....@maximintegrated.com>
---
sound/soc/codecs/max98927.c | 120 ++++++++++++++++++++++++++++++++++++++------
sound/soc/codecs/max98927.h | 1 +
2 files changed, 105 insertions(+), 16 deletions(-)
diff --git a/sound/soc/codecs/max98927.c b/sound/soc/codecs/max98927.c
index 6f7b3ef..a1d3935 100644
--- a/sound/soc/codecs/max98927.c
+++ b/sound/soc/codecs/max98927.c
@@ -250,6 +250,21 @@ static const int rate_table[] = {
13000000, 19200000,
};
+/* BCLKs per LRCLK */
+static const int bclk_sel_table[] = {
+ 32, 48, 64, 96, 128, 192, 256, 384, 512,
+};
+
+static int max98927_get_bclk_sel(int bclk)
+{
+ int i;
+ /* match BCLKs per LRCLK */
+ for (i = 0; i < ARRAY_SIZE(bclk_sel_table); i++) {
+ if (bclk_sel_table[i] == bclk)
+ return i + 2;
+ }
+ return 0;
+}
static int max98927_set_clock(struct max98927_priv *max98927,
struct snd_pcm_hw_params *params)
{
@@ -275,23 +290,20 @@ static int max98927_set_clock(struct max98927_priv
*max98927,
i << MAX98927_PCM_MASTER_MODE_MCLK_RATE_SHIFT);
}
- switch (blr_clk_ratio) {
- case 32:
- value = 2;
- break;
- case 48:
- value = 3;
- break;
- case 64:
- value = 4;
- break;
- default:
- return -EINVAL;
+ if (!max98927->tdm_mode) {
+ /* BCLK configuration */
+ value = max98927_get_bclk_sel(blr_clk_ratio);
+ if (!value) {
+ dev_err(codec->dev, "format unsupported %d\n",
+ params_format(params));
+ return -EINVAL;
+ }
+
+ regmap_update_bits(max98927->regmap,
+ MAX98927_R0022_PCM_CLK_SETUP,
+ MAX98927_PCM_CLK_SETUP_BSEL_MASK,
+ value);
}
- regmap_update_bits(max98927->regmap,
- MAX98927_R0022_PCM_CLK_SETUP,
- MAX98927_PCM_CLK_SETUP_BSEL_MASK,
- value);
return 0;
}
@@ -391,6 +403,78 @@ static int max98927_dai_hw_params(struct snd_pcm_substream
*substream,
return -EINVAL;
}
+static int max98927_dai_tdm_slot(struct snd_soc_dai *dai,
+ unsigned int tx_mask, unsigned int rx_mask,
+ int slots, int slot_width)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
+ int bsel = 0;
+ unsigned int chan_sz = 0;
+
+ max98927->tdm_mode = true;
+
+ /* BCLK configuration */
+ bsel = max98927_get_bclk_sel(slots * slot_width);
+ if (bsel == 0) {
+ dev_err(codec->dev, "BCLK %d not supported\n",
+ slots * slot_width);
+ return -EINVAL;
+ }
+
+ regmap_update_bits(max98927->regmap,
+ MAX98927_R0022_PCM_CLK_SETUP,
+ MAX98927_PCM_CLK_SETUP_BSEL_MASK,
+ bsel);
+
+ /* Channel size configuration */
+ switch (slot_width) {
+ case 16:
+ chan_sz = MAX98927_PCM_MODE_CFG_CHANSZ_16;
+ break;
+ case 24:
+ chan_sz = MAX98927_PCM_MODE_CFG_CHANSZ_24;
+ break;
+ case 32:
+ chan_sz = MAX98927_PCM_MODE_CFG_CHANSZ_32;
+ break;
+ default:
+ dev_err(codec->dev, "format unsupported %d\n",
+ slot_width);
+ return -EINVAL;
+ }
+
+ regmap_update_bits(max98927->regmap,
+ MAX98927_R0020_PCM_MODE_CFG,
+ MAX98927_PCM_MODE_CFG_CHANSZ_MASK, chan_sz);
+
+ /* Rx slot configuration */
+ regmap_write(max98927->regmap,
+ MAX98927_R0018_PCM_RX_EN_A,
+ rx_mask & 0xFF);
+ regmap_write(max98927->regmap,
+ MAX98927_R0019_PCM_RX_EN_B,
+ (rx_mask & 0xFF00) >> 8);
+
+ /* Tx slot configuration */
+ regmap_write(max98927->regmap,
+ MAX98927_R001A_PCM_TX_EN_A,
+ tx_mask & 0xFF);
+ regmap_write(max98927->regmap,
+ MAX98927_R001B_PCM_TX_EN_B,
+ (tx_mask & 0xFF00) >> 8);
+
+ /* Tx slot Hi-Z configuration */
+ regmap_write(max98927->regmap,
+ MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
+ ~tx_mask & 0xFF);
+ regmap_write(max98927->regmap,
+ MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
+ (~tx_mask & 0xFF00) >> 8);
+
+ return 0;
+}
+
#define MAX98927_RATES SNDRV_PCM_RATE_8000_48000
#define MAX98927_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
@@ -410,6 +494,7 @@ static const struct snd_soc_dai_ops max98927_dai_ops = {
.set_sysclk = max98927_dai_set_sysclk,
.set_fmt = max98927_dai_set_fmt,
.hw_params = max98927_dai_hw_params,
+ .set_tdm_slot = max98927_dai_tdm_slot,
};
static int max98927_dac_event(struct snd_soc_dapm_widget *w,
@@ -419,6 +504,9 @@ static int max98927_dac_event(struct snd_soc_dapm_widget *w,
struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ max98927->tdm_mode = 0;
+ break;
case SND_SOC_DAPM_POST_PMU:
regmap_update_bits(max98927->regmap,
MAX98927_R003A_AMP_EN,
diff --git a/sound/soc/codecs/max98927.h b/sound/soc/codecs/max98927.h
index bf7a6f92..9ea8397 100644
--- a/sound/soc/codecs/max98927.h
+++ b/sound/soc/codecs/max98927.h
@@ -270,5 +270,6 @@ struct max98927_priv {
unsigned int iface;
unsigned int master;
unsigned int digital_gain;
+ bool tdm_mode;
};
#endif
--
2.7.4
