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343 lines
8.4 KiB
343 lines
8.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* AK4104 ALSA SoC (ASoC) driver |
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* |
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* Copyright (c) 2009 Daniel Mack <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/spi/spi.h> |
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#include <linux/of_device.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/regulator/consumer.h> |
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#include <sound/asoundef.h> |
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#include <sound/core.h> |
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#include <sound/soc.h> |
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#include <sound/initval.h> |
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/* AK4104 registers addresses */ |
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#define AK4104_REG_CONTROL1 0x00 |
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#define AK4104_REG_RESERVED 0x01 |
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#define AK4104_REG_CONTROL2 0x02 |
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#define AK4104_REG_TX 0x03 |
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#define AK4104_REG_CHN_STATUS(x) ((x) + 0x04) |
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#define AK4104_NUM_REGS 10 |
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#define AK4104_REG_MASK 0x1f |
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#define AK4104_READ 0xc0 |
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#define AK4104_WRITE 0xe0 |
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#define AK4104_RESERVED_VAL 0x5b |
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/* Bit masks for AK4104 registers */ |
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#define AK4104_CONTROL1_RSTN (1 << 0) |
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#define AK4104_CONTROL1_PW (1 << 1) |
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#define AK4104_CONTROL1_DIF0 (1 << 2) |
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#define AK4104_CONTROL1_DIF1 (1 << 3) |
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#define AK4104_CONTROL2_SEL0 (1 << 0) |
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#define AK4104_CONTROL2_SEL1 (1 << 1) |
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#define AK4104_CONTROL2_MODE (1 << 2) |
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#define AK4104_TX_TXE (1 << 0) |
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#define AK4104_TX_V (1 << 1) |
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struct ak4104_private { |
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struct regmap *regmap; |
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struct regulator *regulator; |
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}; |
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static const struct snd_soc_dapm_widget ak4104_dapm_widgets[] = { |
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SND_SOC_DAPM_PGA("TXE", AK4104_REG_TX, AK4104_TX_TXE, 0, NULL, 0), |
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SND_SOC_DAPM_OUTPUT("TX"), |
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}; |
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static const struct snd_soc_dapm_route ak4104_dapm_routes[] = { |
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{ "TXE", NULL, "Playback" }, |
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{ "TX", NULL, "TXE" }, |
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}; |
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static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai, |
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unsigned int format) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component); |
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int val = 0; |
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int ret; |
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/* set DAI format */ |
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switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { |
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case SND_SOC_DAIFMT_RIGHT_J: |
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break; |
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case SND_SOC_DAIFMT_LEFT_J: |
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val |= AK4104_CONTROL1_DIF0; |
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break; |
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case SND_SOC_DAIFMT_I2S: |
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val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1; |
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break; |
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default: |
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dev_err(component->dev, "invalid dai format\n"); |
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return -EINVAL; |
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} |
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/* This device can only be slave */ |
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if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) |
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return -EINVAL; |
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ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1, |
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AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1, |
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val); |
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if (ret < 0) |
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return ret; |
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return 0; |
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} |
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static int ak4104_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component); |
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int ret, val = 0; |
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/* set the IEC958 bits: consumer mode, no copyright bit */ |
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val |= IEC958_AES0_CON_NOT_COPYRIGHT; |
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regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val); |
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val = 0; |
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switch (params_rate(params)) { |
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case 22050: |
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val |= IEC958_AES3_CON_FS_22050; |
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break; |
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case 24000: |
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val |= IEC958_AES3_CON_FS_24000; |
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break; |
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case 32000: |
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val |= IEC958_AES3_CON_FS_32000; |
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break; |
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case 44100: |
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val |= IEC958_AES3_CON_FS_44100; |
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break; |
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case 48000: |
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val |= IEC958_AES3_CON_FS_48000; |
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break; |
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case 88200: |
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val |= IEC958_AES3_CON_FS_88200; |
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break; |
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case 96000: |
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val |= IEC958_AES3_CON_FS_96000; |
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break; |
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case 176400: |
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val |= IEC958_AES3_CON_FS_176400; |
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break; |
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case 192000: |
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val |= IEC958_AES3_CON_FS_192000; |
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break; |
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default: |
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dev_err(component->dev, "unsupported sampling rate\n"); |
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return -EINVAL; |
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} |
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ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val); |
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if (ret < 0) |
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return ret; |
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return 0; |
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} |
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static const struct snd_soc_dai_ops ak4101_dai_ops = { |
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.hw_params = ak4104_hw_params, |
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.set_fmt = ak4104_set_dai_fmt, |
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}; |
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static struct snd_soc_dai_driver ak4104_dai = { |
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.name = "ak4104-hifi", |
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.playback = { |
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.stream_name = "Playback", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | |
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SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | |
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SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | |
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SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | |
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SNDRV_PCM_FMTBIT_S24_3LE | |
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SNDRV_PCM_FMTBIT_S24_LE |
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}, |
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.ops = &ak4101_dai_ops, |
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}; |
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static int ak4104_probe(struct snd_soc_component *component) |
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{ |
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struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component); |
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int ret; |
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ret = regulator_enable(ak4104->regulator); |
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if (ret < 0) { |
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dev_err(component->dev, "Unable to enable regulator: %d\n", ret); |
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return ret; |
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} |
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/* set power-up and non-reset bits */ |
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ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1, |
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AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, |
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AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN); |
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if (ret < 0) |
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goto exit_disable_regulator; |
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/* enable transmitter */ |
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ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX, |
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AK4104_TX_TXE, AK4104_TX_TXE); |
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if (ret < 0) |
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goto exit_disable_regulator; |
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return 0; |
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exit_disable_regulator: |
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regulator_disable(ak4104->regulator); |
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return ret; |
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} |
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static void ak4104_remove(struct snd_soc_component *component) |
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{ |
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struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component); |
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regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1, |
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AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0); |
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regulator_disable(ak4104->regulator); |
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} |
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#ifdef CONFIG_PM |
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static int ak4104_soc_suspend(struct snd_soc_component *component) |
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{ |
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struct ak4104_private *priv = snd_soc_component_get_drvdata(component); |
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regulator_disable(priv->regulator); |
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return 0; |
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} |
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static int ak4104_soc_resume(struct snd_soc_component *component) |
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{ |
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struct ak4104_private *priv = snd_soc_component_get_drvdata(component); |
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int ret; |
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ret = regulator_enable(priv->regulator); |
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if (ret < 0) |
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return ret; |
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return 0; |
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} |
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#else |
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#define ak4104_soc_suspend NULL |
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#define ak4104_soc_resume NULL |
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#endif /* CONFIG_PM */ |
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static const struct snd_soc_component_driver soc_component_device_ak4104 = { |
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.probe = ak4104_probe, |
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.remove = ak4104_remove, |
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.suspend = ak4104_soc_suspend, |
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.resume = ak4104_soc_resume, |
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.dapm_widgets = ak4104_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(ak4104_dapm_widgets), |
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.dapm_routes = ak4104_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(ak4104_dapm_routes), |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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.non_legacy_dai_naming = 1, |
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}; |
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static const struct regmap_config ak4104_regmap = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.max_register = AK4104_NUM_REGS - 1, |
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.read_flag_mask = AK4104_READ, |
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.write_flag_mask = AK4104_WRITE, |
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.cache_type = REGCACHE_RBTREE, |
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}; |
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static int ak4104_spi_probe(struct spi_device *spi) |
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{ |
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struct ak4104_private *ak4104; |
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struct gpio_desc *reset_gpiod; |
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unsigned int val; |
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int ret; |
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spi->bits_per_word = 8; |
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spi->mode = SPI_MODE_0; |
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ret = spi_setup(spi); |
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if (ret < 0) |
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return ret; |
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ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private), |
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GFP_KERNEL); |
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if (ak4104 == NULL) |
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return -ENOMEM; |
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ak4104->regulator = devm_regulator_get(&spi->dev, "vdd"); |
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if (IS_ERR(ak4104->regulator)) { |
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ret = PTR_ERR(ak4104->regulator); |
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dev_err(&spi->dev, "Unable to get Vdd regulator: %d\n", ret); |
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return ret; |
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} |
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ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap); |
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if (IS_ERR(ak4104->regmap)) { |
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ret = PTR_ERR(ak4104->regmap); |
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return ret; |
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} |
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reset_gpiod = devm_gpiod_get_optional(&spi->dev, "reset", |
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GPIOD_OUT_HIGH); |
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if (PTR_ERR(reset_gpiod) == -EPROBE_DEFER) |
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return -EPROBE_DEFER; |
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/* read the 'reserved' register - according to the datasheet, it |
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* should contain 0x5b. Not a good way to verify the presence of |
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* the device, but there is no hardware ID register. */ |
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ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val); |
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if (ret != 0) |
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return ret; |
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if (val != AK4104_RESERVED_VAL) |
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return -ENODEV; |
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spi_set_drvdata(spi, ak4104); |
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ret = devm_snd_soc_register_component(&spi->dev, |
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&soc_component_device_ak4104, &ak4104_dai, 1); |
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return ret; |
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} |
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static const struct of_device_id ak4104_of_match[] = { |
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{ .compatible = "asahi-kasei,ak4104", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, ak4104_of_match); |
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static const struct spi_device_id ak4104_id_table[] = { |
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{ "ak4104", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(spi, ak4104_id_table); |
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static struct spi_driver ak4104_spi_driver = { |
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.driver = { |
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.name = "ak4104", |
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.of_match_table = ak4104_of_match, |
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}, |
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.id_table = ak4104_id_table, |
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.probe = ak4104_spi_probe, |
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}; |
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module_spi_driver(ak4104_spi_driver); |
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MODULE_AUTHOR("Daniel Mack <[email protected]>"); |
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MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver"); |
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MODULE_LICENSE("GPL"); |
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