[PATCH 2/6] ASoC: codecs: aw88166: add TDM support
From: Aaron Kling via B4 Relay
Date: Fri Sep 25 2026 - 03:52:48 EST
From: Aaron Kling <webgeek1234@xxxxxxxxx>
This amp supports TDM mode, so implement the set_tdm_slot operation to
let the SoC driver configure the TDM slot number, width, and masks.
Signed-off-by: Aaron Kling <webgeek1234@xxxxxxxxx>
---
sound/soc/codecs/aw88166.c | 123 ++++++++++++++++++++++++++++++++++++++++++++-
sound/soc/codecs/aw88166.h | 50 ++++++++++++++++++
2 files changed, 171 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/aw88166.c b/sound/soc/codecs/aw88166.c
index 89608118cac6c..cd8773e316b90 100644
--- a/sound/soc/codecs/aw88166.c
+++ b/sound/soc/codecs/aw88166.c
@@ -7,6 +7,7 @@
// Author: Weidong Wang <wangweidong.a@xxxxxxxxxx>
//
+#include <linux/bitops.h>
#include <linux/cleanup.h>
#include <linux/crc32.h>
#include <linux/firmware.h>
@@ -38,8 +39,14 @@ struct aw88166 {
unsigned int fs_value;
unsigned int bck_value;
unsigned int bck_inv_value;
+ unsigned int tdm_bck_value;
unsigned int md_value;
+ unsigned int slot_num_value;
+ unsigned int tx_slotvld_mask;
+ unsigned int rxl_slotvld_mask;
+ unsigned int rxr_slotvld_mask;
+
bool phase_sync;
};
@@ -125,11 +132,35 @@ static int aw88166_dev_check_pll(struct aw_device *aw_dev)
return -EPERM;
}
-static int aw88166_dev_configure_syspll(struct aw88166 *aw88261)
+static int aw88166_dev_configure_syspll(struct aw88166 *aw88166)
{
struct aw_device *aw_dev = aw88166->aw_pa;
int ret;
+ /* Configure TDM slots (I2S is represented as no slots) */
+ ret = regmap_update_bits(aw_dev->regmap, AW88166_I2SCTRL2_REG,
+ ~AW88166_SLOT_NUM_MASK, aw88166->slot_num_value);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(aw_dev->regmap, AW88166_I2SCTRL2_REG,
+ ~AW88166_I2S_TX_SLOTVLD_MASK,
+ aw88166->tx_slotvld_mask);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(aw_dev->regmap, AW88166_I2SCTRL2_REG,
+ ~AW88166_I2S_RXL_SLOTVLD_MASK,
+ aw88166->rxl_slotvld_mask);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(aw_dev->regmap, AW88166_I2SCTRL2_REG,
+ ~AW88166_I2S_RXR_SLOTVLD_MASK,
+ aw88166->rxr_slotvld_mask);
+ if (ret)
+ return ret;
+
/* PLL divider must be used for 8/16/32 kHz modes */
ret = regmap_update_bits(aw_dev->regmap, AW88166_PLLCTRL1_REG,
~AW88166_CCO_MUX_MASK, aw88166->cco_mux_value);
@@ -144,7 +175,9 @@ static int aw88166_dev_configure_syspll(struct aw88166 *aw88261)
/* The bit clock (BCK) defines the length of a frame */
ret = regmap_update_bits(aw_dev->regmap, AW88166_I2SCTRL1_REG,
- ~AW88166_I2SBCK_MASK, aw88166->bck_value);
+ ~AW88166_I2SBCK_MASK,
+ (aw88166->tdm_bck_value != AW88166_TDM_BCK_UNSET)
+ ? aw88166->tdm_bck_value : aw88166->bck_value);
if (ret)
return ret;
@@ -1260,9 +1293,11 @@ static int aw88166_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_DSP_A:
aw88166->md_value = AW88166_I2SMD_PHILIPS_STANDARD_VALUE;
break;
case SND_SOC_DAIFMT_MSB:
+ case SND_SOC_DAIFMT_DSP_B:
aw88166->md_value = AW88166_I2SMD_MSB_JUSTIFIED_VALUE;
break;
case SND_SOC_DAIFMT_LSB:
@@ -1369,9 +1404,90 @@ static int aw88166_hw_params(struct snd_pcm_substream *substream,
return 0;
}
+static int aw88166_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 aw88166 *aw88166 = snd_soc_component_get_drvdata(component);
+ int chan;
+
+ switch (slots) {
+ case 0:
+ /* Just reset everything TDM related to I2S values */
+ aw88166->slot_num_value = AW88166_SLOT_NUM_I2S_MODE_VALUE;
+ aw88166->tdm_bck_value = AW88166_TDM_BCK_UNSET;
+ aw88166->tx_slotvld_mask = 0 << AW88166_I2S_TX_SLOTVLD_START_BIT;
+ aw88166->rxl_slotvld_mask = 0 << AW88166_I2S_RXL_SLOTVLD_START_BIT;
+ aw88166->rxr_slotvld_mask = 1 << AW88166_I2S_RXR_SLOTVLD_START_BIT;
+ return 0;
+ case 1:
+ aw88166->slot_num_value = AW88166_SLOT_NUM_TDM1S_VALUE;
+ break;
+ case 2:
+ aw88166->slot_num_value = AW88166_SLOT_NUM_TDM2S_VALUE;
+ break;
+ case 4:
+ aw88166->slot_num_value = AW88166_SLOT_NUM_TDM4S_VALUE;
+ break;
+ case 6:
+ aw88166->slot_num_value = AW88166_SLOT_NUM_TDM6S_VALUE;
+ break;
+ case 8:
+ aw88166->slot_num_value = AW88166_SLOT_NUM_TDM8S_VALUE;
+ break;
+ case 16:
+ aw88166->slot_num_value = AW88166_SLOT_NUM_TDM16S_VALUE;
+ break;
+ default:
+ dev_err(aw88166->aw_pa->dev, "unsupported slot count %d\n", slots);
+ return -EINVAL;
+ }
+
+ switch (slot_width) {
+ case 16:
+ aw88166->tdm_bck_value = AW88166_I2SBCK_32FS_VALUE;
+ break;
+ case 20:
+ case 24:
+ aw88166->tdm_bck_value = AW88166_I2SBCK_48FS_VALUE;
+ break;
+ case 32:
+ aw88166->tdm_bck_value = AW88166_I2SBCK_64FS_VALUE;
+ break;
+ default:
+ dev_err(aw88166->aw_pa->dev, "unsupported slot width %d\n",
+ slot_width);
+ return -EINVAL;
+ }
+
+ if (tx_mask != 0) {
+ if ((chan = __ffs(tx_mask)) > 16)
+ return -EINVAL;
+
+ aw88166->tx_slotvld_mask = chan << AW88166_I2S_TX_SLOTVLD_START_BIT;
+ }
+
+ if (rx_mask != 0) {
+ if ((chan = __ffs(rx_mask)) > 16)
+ return -EINVAL;
+
+ aw88166->rxl_slotvld_mask = chan << AW88166_I2S_RXL_SLOTVLD_START_BIT;
+ }
+
+ if ((rx_mask & ~BIT(chan)) != 0) {
+ if ((chan = __ffs(rx_mask & ~BIT(chan))) > 16)
+ return -EINVAL;
+
+ aw88166->rxr_slotvld_mask = chan << AW88166_I2S_RXR_SLOTVLD_START_BIT;
+ }
+
+ return 0;
+}
+
static const struct snd_soc_dai_ops aw88166_dai_ops = {
.set_fmt = aw88166_set_fmt,
.hw_params = aw88166_hw_params,
+ .set_tdm_slot = aw88166_set_tdm_slot,
};
static struct snd_soc_dai_driver aw88166_dai[] = {
@@ -1891,12 +2007,15 @@ static int aw88166_i2c_probe(struct i2c_client *i2c)
return -ENOMEM;
/* set defaults */
+ aw88166->slot_num_value = AW88166_SLOT_NUM_I2S_MODE_VALUE;
aw88166->sr_value = AW88166_I2SSR_48KHZ_VALUE;
aw88166->cco_mux_value = AW88166_CCO_MUX_BYPASS_VALUE;
aw88166->fs_value = AW88166_I2SFS_24_BITS_VALUE;
aw88166->bck_value = AW88166_I2SBCK_64FS_VALUE;
aw88166->bck_inv_value = AW88166_BCKINV_NOT_INVERT_VALUE;
+ aw88166->tdm_bck_value = AW88166_TDM_BCK_UNSET;
aw88166->md_value = AW88166_I2SMD_PHILIPS_STANDARD_VALUE;
+ aw88166->rxr_slotvld_mask = 1 << AW88166_I2S_RXR_SLOTVLD_START_BIT;
mutex_init(&aw88166->lock);
diff --git a/sound/soc/codecs/aw88166.h b/sound/soc/codecs/aw88166.h
index 0aa92b3b6c3b8..377a733447e70 100644
--- a/sound/soc/codecs/aw88166.h
+++ b/sound/soc/codecs/aw88166.h
@@ -437,6 +437,8 @@
#define AW88166_I2SBCK_64FS_VALUE \
(AW88166_I2SBCK_64FS << AW88166_I2SBCK_START_BIT)
+#define AW88166_TDM_BCK_UNSET UINT_MAX
+
#define AW88166_I2SSR_START_BIT (0)
#define AW88166_I2SSR_BITS_LEN (4)
#define AW88166_I2SSR_MASK \
@@ -476,6 +478,54 @@
#define AW88166_I2SSR_192KHZ_VALUE \
(AW88166_I2SSR_192KHZ << AW88166_I2SSR_START_BIT)
+#define AW88166_SLOT_NUM_START_BIT (12)
+#define AW88166_SLOT_NUM_BITS_LEN (3)
+#define AW88166_SLOT_NUM_MASK \
+ (~(((1<<AW88166_SLOT_NUM_BITS_LEN)-1) << AW88166_SLOT_NUM_START_BIT))
+
+#define AW88166_SLOT_NUM_I2S_MODE (0)
+#define AW88166_SLOT_NUM_I2S_MODE_VALUE \
+ (AW88166_SLOT_NUM_I2S_MODE << AW88166_SLOT_NUM_START_BIT)
+
+#define AW88166_SLOT_NUM_TDM1S (1)
+#define AW88166_SLOT_NUM_TDM1S_VALUE \
+ (AW88166_SLOT_NUM_TDM1S << AW88166_SLOT_NUM_START_BIT)
+
+#define AW88166_SLOT_NUM_TDM2S (2)
+#define AW88166_SLOT_NUM_TDM2S_VALUE \
+ (AW88166_SLOT_NUM_TDM2S << AW88166_SLOT_NUM_START_BIT)
+
+#define AW88166_SLOT_NUM_TDM4S (3)
+#define AW88166_SLOT_NUM_TDM4S_VALUE \
+ (AW88166_SLOT_NUM_TDM4S << AW88166_SLOT_NUM_START_BIT)
+
+#define AW88166_SLOT_NUM_TDM6S (4)
+#define AW88166_SLOT_NUM_TDM6S_VALUE \
+ (AW88166_SLOT_NUM_TDM6S << AW88166_SLOT_NUM_START_BIT)
+
+#define AW88166_SLOT_NUM_TDM8S (5)
+#define AW88166_SLOT_NUM_TDM8S_VALUE \
+ (AW88166_SLOT_NUM_TDM8S << AW88166_SLOT_NUM_START_BIT)
+
+#define AW88166_SLOT_NUM_TDM16S (6)
+#define AW88166_SLOT_NUM_TDM16S_VALUE \
+ (AW88166_SLOT_NUM_TDM16S << AW88166_SLOT_NUM_START_BIT)
+
+#define AW88166_I2S_TX_SLOTVLD_START_BIT (8)
+#define AW88166_I2S_TX_SLOTVLD_BITS_LEN (4)
+#define AW88166_I2S_TX_SLOTVLD_MASK \
+ (~(((1<<AW88166_I2S_TX_SLOTVLD_BITS_LEN)-1) << AW88166_I2S_TX_SLOTVLD_START_BIT))
+
+#define AW88166_I2S_RXR_SLOTVLD_START_BIT (4)
+#define AW88166_I2S_RXR_SLOTVLD_BITS_LEN (4)
+#define AW88166_I2S_RXR_SLOTVLD_MASK \
+ (~(((1<<AW88166_I2S_RXR_SLOTVLD_BITS_LEN)-1) << AW88166_I2S_RXR_SLOTVLD_START_BIT))
+
+#define AW88166_I2S_RXL_SLOTVLD_START_BIT (0)
+#define AW88166_I2S_RXL_SLOTVLD_BITS_LEN (4)
+#define AW88166_I2S_RXL_SLOTVLD_MASK \
+ (~(((1<<AW88166_I2S_RXL_SLOTVLD_BITS_LEN)-1) << AW88166_I2S_RXL_SLOTVLD_START_BIT))
+
#define AW88166_CCO_MUX_START_BIT (8)
#define AW88166_CCO_MUX_BITS_LEN (1)
#define AW88166_CCO_MUX_MASK \
--
2.54.0