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>
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@ -1124,6 +1124,57 @@ static int nau8824_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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return 0;
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}
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/**
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* nau8824_set_tdm_slot - configure DAI TDM.
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* @dai: DAI
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* @tx_mask: Bitmask representing active TX slots. Ex.
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* 0xf for normal 4 channel TDM.
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* 0xf0 for shifted 4 channel TDM
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* @rx_mask: Bitmask [0:1] representing active DACR RX slots.
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* Bitmask [2:3] representing active DACL RX slots.
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* 00=CH0,01=CH1,10=CH2,11=CH3. Ex.
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* 0xf for DACL/R selecting TDM CH3.
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* 0xf0 for DACL/R selecting shifted TDM CH3.
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* @slots: Number of slots in use.
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* @slot_width: Width in bits for each slot.
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*
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* Configures a DAI for TDM operation. Only support 4 slots TDM.
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*/
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static int nau8824_set_tdm_slot(struct snd_soc_dai *dai,
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unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct nau8824 *nau8824 = snd_soc_codec_get_drvdata(codec);
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unsigned int tslot_l = 0, ctrl_val = 0;
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if (slots > 4 || ((tx_mask & 0xf0) && (tx_mask & 0xf)) ||
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((rx_mask & 0xf0) && (rx_mask & 0xf)) ||
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((rx_mask & 0xf0) && (tx_mask & 0xf)) ||
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((rx_mask & 0xf) && (tx_mask & 0xf0)))
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return -EINVAL;
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ctrl_val |= (NAU8824_TDM_MODE | NAU8824_TDM_OFFSET_EN);
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if (tx_mask & 0xf0) {
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tslot_l = 4 * slot_width;
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ctrl_val |= (tx_mask >> 4);
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} else {
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ctrl_val |= tx_mask;
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}
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if (rx_mask & 0xf0)
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ctrl_val |= ((rx_mask >> 4) << NAU8824_TDM_DACR_RX_SFT);
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else
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ctrl_val |= (rx_mask << NAU8824_TDM_DACR_RX_SFT);
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regmap_update_bits(nau8824->regmap, NAU8824_REG_TDM_CTRL,
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NAU8824_TDM_MODE | NAU8824_TDM_OFFSET_EN |
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NAU8824_TDM_DACL_RX_MASK | NAU8824_TDM_DACR_RX_MASK |
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NAU8824_TDM_TX_MASK, ctrl_val);
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regmap_update_bits(nau8824->regmap, NAU8824_REG_PORT0_LEFT_TIME_SLOT,
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NAU8824_TSLOT_L_MASK, tslot_l);
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return 0;
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}
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/**
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* nau8824_calc_fll_param - Calculate FLL parameters.
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* @fll_in: external clock provided to codec.
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@ -1440,6 +1491,7 @@ static struct snd_soc_codec_driver nau8824_codec_driver = {
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static const struct snd_soc_dai_ops nau8824_dai_ops = {
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.hw_params = nau8824_hw_params,
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.set_fmt = nau8824_set_fmt,
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.set_tdm_slot = nau8824_set_tdm_slot,
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};
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#define NAU8824_RATES SNDRV_PCM_RATE_8000_192000
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@ -258,6 +258,18 @@
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#define NAU8824_I2S_MS_SLAVE (0 << NAU8824_I2S_MS_SFT)
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#define NAU8824_I2S_BLK_DIV_MASK 0x7
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/* PORT0_LEFT_TIME_SLOT (0x1E) */
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#define NAU8824_TSLOT_L_MASK 0x3ff
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/* TDM_CTRL (0x20) */
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#define NAU8824_TDM_MODE (0x1 << 15)
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#define NAU8824_TDM_OFFSET_EN (0x1 << 14)
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#define NAU8824_TDM_DACL_RX_SFT 6
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#define NAU8824_TDM_DACL_RX_MASK (0x3 << NAU8824_TDM_DACL_RX_SFT)
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#define NAU8824_TDM_DACR_RX_SFT 4
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#define NAU8824_TDM_DACR_RX_MASK (0x3 << NAU8824_TDM_DACR_RX_SFT)
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#define NAU8824_TDM_TX_MASK 0xf
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/* ADC_FILTER_CTRL (0x24) */
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#define NAU8824_ADC_SYNC_DOWN_MASK 0x3
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#define NAU8824_ADC_SYNC_DOWN_32 0
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