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ASoC: nau8824: TDM support 

Support TDM format for NAU88L24.

Signed-off-by: John Hsu <KCHSU0@nuvoton.com>
Signed-off-by: John Hsu <supercraig0719@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
John Hsu 2017-05-02 09:42:58 +08:00 committed by Mark Brown
parent 2ea659a9ef
commit fa10143027
2 changed files with 64 additions and 0 deletions
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52
sound/soc/codecs/nau8824.c
View File

@ -1124,6 +1124,57 @@ static int nau8824_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
return 0;
}
/**
* 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.
@ -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

12
sound/soc/codecs/nau8824.h
View File

@ -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