[PATCH] ASoC: nau8825: Add TDM support
David Lin
CTLIN0 at nuvoton.com
Fri Sep 30 09:28:05 CEST 2022
Support TDM format for NAU88L25.
Signed-off-by: David Lin <CTLIN0 at nuvoton.com>
---
sound/soc/codecs/nau8825.c | 97 ++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/nau8825.h | 14 ++++++
2 files changed, 111 insertions(+)
diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c
index b3cdbe884c05..6a2c2e373efd 100644
--- a/sound/soc/codecs/nau8825.c
+++ b/sound/soc/codecs/nau8825.c
@@ -1425,10 +1425,107 @@ static int nau8825_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
return 0;
}
+/**
+ * nau8825_set_tdm_slot - configure DAI TDM.
+ * @dai: DAI
+ * @tx_mask: bitmask representing active TX slots.
+ * @rx_mask: bitmask representing active RX slots.
+ * @slots: Number of slots in use.
+ * @slot_width: Width in bits for each slot.
+ *
+ * Configures a DAI for TDM operation. Support TDM 4/8 slots.
+ * The limitation is DAC and ADC need shift 4 slots at 8 slots mode.
+ */
+static int nau8825_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+ unsigned int rx_mask, int slots, int slot_width)
+{
+ struct snd_soc_component *component = dai->component;
+ struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);
+ unsigned int ctrl_val = 0, ctrl_offset = 0, value = 0, dac_s, adc_s;
+
+ if (slots != 4 && slots != 8) {
+ dev_err(nau8825->dev, "Only support 4 or 8 slots!\n");
+ return -EINVAL;
+ }
+
+ /* The driver is limited to 1-channel for ADC, and 2-channel for DAC on TDM mode */
+ if (hweight_long((unsigned long) tx_mask) != 1 ||
+ hweight_long((unsigned long) rx_mask) != 2) {
+ dev_err(nau8825->dev,
+ "The limitation is 1-channel for ADC, and 2-channel for DAC on TDM mode.\n");
+ return -EINVAL;
+ }
+
+ if (((tx_mask & 0xf) && (tx_mask & 0xf0)) ||
+ ((rx_mask & 0xf) && (rx_mask & 0xf0)) ||
+ ((tx_mask & 0xf) && (rx_mask & 0xf0)) ||
+ ((rx_mask & 0xf) && (tx_mask & 0xf0))) {
+ dev_err(nau8825->dev,
+ "Slot assignment of DAC and ADC need to set same interval.\n");
+ return -EINVAL;
+ }
+
+ /* The offset of fixed 4 slots for 8 slots support */
+ if (rx_mask & 0xf0) {
+ regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
+ NAU8825_I2S_PCM_TS_EN_MASK, NAU8825_I2S_PCM_TS_EN);
+ regmap_read(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL1, &value);
+ ctrl_val |= NAU8825_TDM_OFFSET_EN;
+ ctrl_offset = 4 * slot_width;
+ if (!(value & NAU8825_I2S_PCMB_MASK))
+ ctrl_offset += 1;
+ dac_s = (rx_mask & 0xf0) >> 4;
+ adc_s = fls((tx_mask & 0xf0) >> 4);
+ } else {
+ dac_s = rx_mask & 0xf;
+ adc_s = fls(tx_mask & 0xf);
+ }
+
+ ctrl_val |= NAU8825_TDM_MODE;
+
+ switch (dac_s) {
+ case 0x3:
+ ctrl_val |= 1 << NAU8825_TDM_DACR_RX_SFT;
+ break;
+ case 0x5:
+ ctrl_val |= 2 << NAU8825_TDM_DACR_RX_SFT;
+ break;
+ case 0x6:
+ ctrl_val |= 1 << NAU8825_TDM_DACL_RX_SFT;
+ ctrl_val |= 2 << NAU8825_TDM_DACR_RX_SFT;
+ break;
+ case 0x9:
+ ctrl_val |= 3 << NAU8825_TDM_DACR_RX_SFT;
+ break;
+ case 0xa:
+ ctrl_val |= 1 << NAU8825_TDM_DACL_RX_SFT;
+ ctrl_val |= 3 << NAU8825_TDM_DACR_RX_SFT;
+ break;
+ case 0xc:
+ ctrl_val |= 2 << NAU8825_TDM_DACL_RX_SFT;
+ ctrl_val |= 3 << NAU8825_TDM_DACR_RX_SFT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ctrl_val |= adc_s - 1;
+
+ regmap_update_bits(nau8825->regmap, NAU8825_REG_TDM_CTRL,
+ NAU8825_TDM_MODE | NAU8825_TDM_OFFSET_EN |
+ NAU8825_TDM_DACL_RX_MASK | NAU8825_TDM_DACR_RX_MASK |
+ NAU8825_TDM_TX_MASK, ctrl_val);
+ regmap_update_bits(nau8825->regmap, NAU8825_REG_LEFT_TIME_SLOT,
+ NAU8825_TSLOT_L0_MASK, ctrl_offset);
+
+ return 0;
+}
+
static const struct snd_soc_dai_ops nau8825_dai_ops = {
.startup = nau8825_dai_startup,
.hw_params = nau8825_hw_params,
.set_fmt = nau8825_set_dai_fmt,
+ .set_tdm_slot = nau8825_set_tdm_slot,
};
#define NAU8825_RATES SNDRV_PCM_RATE_8000_192000
diff --git a/sound/soc/codecs/nau8825.h b/sound/soc/codecs/nau8825.h
index 6d112b6145df..d84191a7beb2 100644
--- a/sound/soc/codecs/nau8825.h
+++ b/sound/soc/codecs/nau8825.h
@@ -225,6 +225,15 @@
#define NAU8825_JKDET_PULL_EN (1 << 9) /* 0 - enable pull, 1 - disable */
#define NAU8825_JKDET_OUTPUT_EN (1 << 8) /* 0 - enable input, 1 - enable output */
+/* TDM_CTRL (0x1b) */
+#define NAU8825_TDM_MODE (0x1 << 15)
+#define NAU8825_TDM_OFFSET_EN (0x1 << 14)
+#define NAU8825_TDM_DACL_RX_SFT 6
+#define NAU8825_TDM_DACL_RX_MASK (0x3 << NAU8825_TDM_DACL_RX_SFT)
+#define NAU8825_TDM_DACR_RX_SFT 4
+#define NAU8825_TDM_DACR_RX_MASK (0x3 << NAU8825_TDM_DACR_RX_SFT)
+#define NAU8825_TDM_TX_MASK 0x3
+
/* I2S_PCM_CTRL1 (0x1c) */
#define NAU8825_I2S_BP_SFT 7
#define NAU8825_I2S_BP_MASK (1 << NAU8825_I2S_BP_SFT)
@@ -249,6 +258,9 @@
#define NAU8825_I2S_TRISTATE (1 << 15) /* 0 - normal mode, 1 - Hi-Z output */
#define NAU8825_I2S_LRC_DIV_SFT 12
#define NAU8825_I2S_LRC_DIV_MASK (0x3 << NAU8825_I2S_LRC_DIV_SFT)
+#define NAU8825_I2S_PCM_TS_EN_SFT 10
+#define NAU8825_I2S_PCM_TS_EN_MASK (1 << NAU8825_I2S_PCM_TS_EN_SFT)
+#define NAU8825_I2S_PCM_TS_EN (1 << NAU8825_I2S_PCM_TS_EN_SFT)
#define NAU8825_I2S_MS_SFT 3
#define NAU8825_I2S_MS_MASK (1 << NAU8825_I2S_MS_SFT)
#define NAU8825_I2S_MS_MASTER (1 << NAU8825_I2S_MS_SFT)
@@ -259,6 +271,8 @@
#define NAU8825_FS_ERR_CMP_SEL_SFT 14
#define NAU8825_FS_ERR_CMP_SEL_MASK (0x3 << NAU8825_FS_ERR_CMP_SEL_SFT)
#define NAU8825_DIS_FS_SHORT_DET (1 << 13)
+#define NAU8825_TSLOT_L0_MASK 0x3ff
+#define NAU8825_TSLOT_R0_MASK 0x3ff
/* BIQ_CTRL (0x20) */
#define NAU8825_BIQ_WRT_SFT 4
--
2.25.1
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