Support TDM format for NAU88L24.
Signed-off-by: John Hsu <KCHSU0@xxxxxxxxxxx>
Signed-off-by: John Hsu <supercraig0719@xxxxxxxxx>
---
sound/soc/codecs/nau8824.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/nau8824.h | 12 +++++++++++
2 files changed, 64 insertions(+)
diff --git a/sound/soc/codecs/nau8824.c b/sound/soc/codecs/nau8824.c
index cca974d..3a309b1 100644
--- a/sound/soc/codecs/nau8824.c
+++ b/sound/soc/codecs/nau8824.c
@@ -1125,6 +1125,57 @@ static int nau8824_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
}
/**
+ * nau8824_set_tdm_slot - configure DAI TDM.
+ * @dai: DAI
+ * @tx_mask: Bitmask representing active TX slots. Ex.
+ * 0xf for normal 4 channel TDM.
+ * 0xf0 for shifted 4 channel TDM
+ * @rx_mask: Bitmask [0:1] representing active DACR RX slots.
+ * Bitmask [2:3] representing active DACL RX slots.
+ * 00=CH0,01=CH1,10=CH2,11=CH3. Ex.
+ * 0xf for DACL/R selecting TDM CH3.
+ * 0xf0 for DACL/R selecting shifted TDM CH3.
+ * @slots: Number of slots in use.
+ * @slot_width: Width in bits for each slot.
+ *
+ * Configures a DAI for TDM operation. Only support 4 slots TDM.
+ */
+static int nau8824_set_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 nau8824 *nau8824 = snd_soc_codec_get_drvdata(codec);
+ unsigned int tslot_l = 0, ctrl_val = 0;
+
+ if (slots > 4 || ((tx_mask & 0xf0) && (tx_mask & 0xf)) ||
+ ((rx_mask & 0xf0) && (rx_mask & 0xf)) ||
+ ((rx_mask & 0xf0) && (tx_mask & 0xf)) ||
+ ((rx_mask & 0xf) && (tx_mask & 0xf0)))
+ return -EINVAL;
+
+ ctrl_val |= (NAU8824_TDM_MODE | NAU8824_TDM_OFFSET_EN);
+ if (tx_mask & 0xf0) {
+ tslot_l = 4 * slot_width;
+ ctrl_val |= (tx_mask >> 4);
+ } else {
+ ctrl_val |= tx_mask;
+ }
+ if (rx_mask & 0xf0)
+ ctrl_val |= ((rx_mask >> 4) << NAU8824_TDM_DACR_RX_SFT);
+ else
+ ctrl_val |= (rx_mask << NAU8824_TDM_DACR_RX_SFT);
+
+ regmap_update_bits(nau8824->regmap, NAU8824_REG_TDM_CTRL,
+ NAU8824_TDM_MODE | NAU8824_TDM_OFFSET_EN |
+ NAU8824_TDM_DACL_RX_MASK | NAU8824_TDM_DACR_RX_MASK |
+ NAU8824_TDM_TX_MASK, ctrl_val);
+ regmap_update_bits(nau8824->regmap, NAU8824_REG_PORT0_LEFT_TIME_SLOT,
+ NAU8824_TSLOT_L_MASK, tslot_l);
+
+ return 0;
+}
+
+/**
* nau8824_calc_fll_param - Calculate FLL parameters.
* @fll_in: external clock provided to codec.
* @fs: sampling rate.
@@ -1440,6 +1491,7 @@ static struct snd_soc_codec_driver nau8824_codec_driver = {
static const struct snd_soc_dai_ops nau8824_dai_ops = {
.hw_params = nau8824_hw_params,
.set_fmt = nau8824_set_fmt,
+ .set_tdm_slot = nau8824_set_tdm_slot,
};
#define NAU8824_RATES SNDRV_PCM_RATE_8000_192000
diff --git a/sound/soc/codecs/nau8824.h b/sound/soc/codecs/nau8824.h
index 87ac9a3..21eae24 100644
--- a/sound/soc/codecs/nau8824.h
+++ b/sound/soc/codecs/nau8824.h
@@ -258,6 +258,18 @@
#define NAU8824_I2S_MS_SLAVE (0 << NAU8824_I2S_MS_SFT)
#define NAU8824_I2S_BLK_DIV_MASK 0x7
+/* PORT0_LEFT_TIME_SLOT (0x1E) */
+#define NAU8824_TSLOT_L_MASK 0x3ff
+
+/* TDM_CTRL (0x20) */
+#define NAU8824_TDM_MODE (0x1 << 15)
+#define NAU8824_TDM_OFFSET_EN (0x1 << 14)
+#define NAU8824_TDM_DACL_RX_SFT 6
+#define NAU8824_TDM_DACL_RX_MASK (0x3 << NAU8824_TDM_DACL_RX_SFT)
+#define NAU8824_TDM_DACR_RX_SFT 4
+#define NAU8824_TDM_DACR_RX_MASK (0x3 << NAU8824_TDM_DACR_RX_SFT)
+#define NAU8824_TDM_TX_MASK 0xf
+
/* ADC_FILTER_CTRL (0x24) */
#define NAU8824_ADC_SYNC_DOWN_MASK 0x3
#define NAU8824_ADC_SYNC_DOWN_32 0
--
2.6.4
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