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339 lines
8.9 KiB
339 lines
8.9 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* PCM1681 ASoC codec driver |
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* |
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* Copyright (c) StreamUnlimited GmbH 2013 |
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* Marek Belisko <[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/delay.h> |
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#include <linux/gpio.h> |
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#include <linux/i2c.h> |
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#include <linux/regmap.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/of_gpio.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/tlv.h> |
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#define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ |
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SNDRV_PCM_FMTBIT_S24_LE) |
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#define PCM1681_PCM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \ |
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SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ |
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ |
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SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000) |
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#define PCM1681_SOFT_MUTE_ALL 0xff |
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#define PCM1681_DEEMPH_RATE_MASK 0x18 |
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#define PCM1681_DEEMPH_MASK 0x01 |
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#define PCM1681_ATT_CONTROL(X) (X <= 6 ? X : X + 9) /* Attenuation level */ |
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#define PCM1681_SOFT_MUTE 0x07 /* Soft mute control register */ |
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#define PCM1681_DAC_CONTROL 0x08 /* DAC operation control */ |
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#define PCM1681_FMT_CONTROL 0x09 /* Audio interface data format */ |
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#define PCM1681_DEEMPH_CONTROL 0x0a /* De-emphasis control */ |
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#define PCM1681_ZERO_DETECT_STATUS 0x0e /* Zero detect status reg */ |
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static const struct reg_default pcm1681_reg_defaults[] = { |
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{ 0x01, 0xff }, |
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{ 0x02, 0xff }, |
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{ 0x03, 0xff }, |
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{ 0x04, 0xff }, |
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{ 0x05, 0xff }, |
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{ 0x06, 0xff }, |
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{ 0x07, 0x00 }, |
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{ 0x08, 0x00 }, |
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{ 0x09, 0x06 }, |
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{ 0x0A, 0x00 }, |
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{ 0x0B, 0xff }, |
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{ 0x0C, 0x0f }, |
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{ 0x0D, 0x00 }, |
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{ 0x10, 0xff }, |
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{ 0x11, 0xff }, |
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{ 0x12, 0x00 }, |
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{ 0x13, 0x00 }, |
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}; |
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static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg) |
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{ |
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return !((reg == 0x00) || (reg == 0x0f)); |
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} |
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static bool pcm1681_writeable_reg(struct device *dev, unsigned int reg) |
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{ |
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return pcm1681_accessible_reg(dev, reg) && |
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(reg != PCM1681_ZERO_DETECT_STATUS); |
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} |
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struct pcm1681_private { |
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struct regmap *regmap; |
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unsigned int format; |
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/* Current deemphasis status */ |
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unsigned int deemph; |
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/* Current rate for deemphasis control */ |
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unsigned int rate; |
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}; |
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static const int pcm1681_deemph[] = { 44100, 48000, 32000 }; |
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static int pcm1681_set_deemph(struct snd_soc_component *component) |
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{ |
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struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); |
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int i, val = -1, enable = 0; |
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if (priv->deemph) { |
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for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++) { |
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if (pcm1681_deemph[i] == priv->rate) { |
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val = i; |
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break; |
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} |
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} |
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} |
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if (val != -1) { |
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regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, |
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PCM1681_DEEMPH_RATE_MASK, val << 3); |
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enable = 1; |
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} else { |
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enable = 0; |
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} |
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/* enable/disable deemphasis functionality */ |
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return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, |
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PCM1681_DEEMPH_MASK, enable); |
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} |
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static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
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struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); |
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ucontrol->value.integer.value[0] = priv->deemph; |
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return 0; |
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} |
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static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
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struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); |
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priv->deemph = ucontrol->value.integer.value[0]; |
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return pcm1681_set_deemph(component); |
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} |
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static int pcm1681_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 pcm1681_private *priv = snd_soc_component_get_drvdata(component); |
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/* The PCM1681 can only be consumer to all clocks */ |
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if ((format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != SND_SOC_DAIFMT_CBC_CFC) { |
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dev_err(component->dev, "Invalid clocking mode\n"); |
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return -EINVAL; |
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} |
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priv->format = format; |
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return 0; |
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} |
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static int pcm1681_mute(struct snd_soc_dai *dai, int mute, int direction) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); |
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int val; |
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if (mute) |
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val = PCM1681_SOFT_MUTE_ALL; |
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else |
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val = 0; |
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return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val); |
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} |
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static int pcm1681_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 pcm1681_private *priv = snd_soc_component_get_drvdata(component); |
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int val = 0, ret; |
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priv->rate = params_rate(params); |
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switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { |
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case SND_SOC_DAIFMT_RIGHT_J: |
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switch (params_width(params)) { |
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case 24: |
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val = 0; |
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break; |
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case 16: |
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val = 3; |
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break; |
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default: |
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return -EINVAL; |
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} |
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break; |
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case SND_SOC_DAIFMT_I2S: |
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val = 0x04; |
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break; |
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case SND_SOC_DAIFMT_LEFT_J: |
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val = 0x05; |
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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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ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val); |
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if (ret < 0) |
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return ret; |
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return pcm1681_set_deemph(component); |
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} |
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static const struct snd_soc_dai_ops pcm1681_dai_ops = { |
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.set_fmt = pcm1681_set_dai_fmt, |
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.hw_params = pcm1681_hw_params, |
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.mute_stream = pcm1681_mute, |
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.no_capture_mute = 1, |
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}; |
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static const struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = { |
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SND_SOC_DAPM_OUTPUT("VOUT1"), |
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SND_SOC_DAPM_OUTPUT("VOUT2"), |
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SND_SOC_DAPM_OUTPUT("VOUT3"), |
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SND_SOC_DAPM_OUTPUT("VOUT4"), |
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SND_SOC_DAPM_OUTPUT("VOUT5"), |
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SND_SOC_DAPM_OUTPUT("VOUT6"), |
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SND_SOC_DAPM_OUTPUT("VOUT7"), |
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SND_SOC_DAPM_OUTPUT("VOUT8"), |
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}; |
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static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = { |
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{ "VOUT1", NULL, "Playback" }, |
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{ "VOUT2", NULL, "Playback" }, |
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{ "VOUT3", NULL, "Playback" }, |
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{ "VOUT4", NULL, "Playback" }, |
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{ "VOUT5", NULL, "Playback" }, |
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{ "VOUT6", NULL, "Playback" }, |
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{ "VOUT7", NULL, "Playback" }, |
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{ "VOUT8", NULL, "Playback" }, |
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}; |
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static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1); |
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static const struct snd_kcontrol_new pcm1681_controls[] = { |
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SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume", |
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PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0, |
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0x7f, 0, pcm1681_dac_tlv), |
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SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume", |
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PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0, |
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0x7f, 0, pcm1681_dac_tlv), |
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SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume", |
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PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0, |
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0x7f, 0, pcm1681_dac_tlv), |
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SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume", |
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PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0, |
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0x7f, 0, pcm1681_dac_tlv), |
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SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0, |
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pcm1681_get_deemph, pcm1681_put_deemph), |
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}; |
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static struct snd_soc_dai_driver pcm1681_dai = { |
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.name = "pcm1681-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 = 8, |
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.rates = PCM1681_PCM_RATES, |
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.formats = PCM1681_PCM_FORMATS, |
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}, |
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.ops = &pcm1681_dai_ops, |
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}; |
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#ifdef CONFIG_OF |
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static const struct of_device_id pcm1681_dt_ids[] = { |
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{ .compatible = "ti,pcm1681", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, pcm1681_dt_ids); |
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#endif |
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static const struct regmap_config pcm1681_regmap = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.max_register = 0x13, |
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.reg_defaults = pcm1681_reg_defaults, |
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.num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults), |
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.writeable_reg = pcm1681_writeable_reg, |
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.readable_reg = pcm1681_accessible_reg, |
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}; |
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static const struct snd_soc_component_driver soc_component_dev_pcm1681 = { |
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.controls = pcm1681_controls, |
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.num_controls = ARRAY_SIZE(pcm1681_controls), |
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.dapm_widgets = pcm1681_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(pcm1681_dapm_widgets), |
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.dapm_routes = pcm1681_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(pcm1681_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 i2c_device_id pcm1681_i2c_id[] = { |
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{"pcm1681", 0}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id); |
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static int pcm1681_i2c_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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int ret; |
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struct pcm1681_private *priv; |
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priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap); |
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if (IS_ERR(priv->regmap)) { |
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ret = PTR_ERR(priv->regmap); |
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dev_err(&client->dev, "Failed to create regmap: %d\n", ret); |
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return ret; |
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} |
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i2c_set_clientdata(client, priv); |
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return devm_snd_soc_register_component(&client->dev, |
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&soc_component_dev_pcm1681, |
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&pcm1681_dai, 1); |
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} |
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static struct i2c_driver pcm1681_i2c_driver = { |
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.driver = { |
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.name = "pcm1681", |
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.of_match_table = of_match_ptr(pcm1681_dt_ids), |
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}, |
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.id_table = pcm1681_i2c_id, |
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.probe = pcm1681_i2c_probe, |
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}; |
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module_i2c_driver(pcm1681_i2c_driver); |
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MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver"); |
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MODULE_AUTHOR("Marek Belisko <[email protected]>"); |
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MODULE_LICENSE("GPL");
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