--- /dev/null
+/*
+ * ak4641.c -- AK4641 ALSA Soc Audio driver
+ *
+ * Copyright (C) 2008 Harald Welte <laforge@gnufiish.org>
+ * Copyright (C) 2011 Dmitry Artamonow <mad_soft@inbox.ru>
+ *
+ * Based on ak4535.c by Richard Purdie
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+#include <sound/ak4641.h>
+
+#include "ak4641.h"
+
+/* codec private data */
+struct ak4641_priv {
+ struct regmap *regmap;
+ unsigned int sysclk;
+ int deemph;
+ int playback_fs;
+};
+
+/*
+ * ak4641 register cache
+ */
+static const struct reg_default ak4641_reg_defaults[] = {
+ { 0, 0x00 }, { 1, 0x80 }, { 2, 0x00 }, { 3, 0x80 },
+ { 4, 0x02 }, { 5, 0x00 }, { 6, 0x11 }, { 7, 0x05 },
+ { 8, 0x00 }, { 9, 0x00 }, { 10, 0x36 }, { 11, 0x10 },
+ { 12, 0x00 }, { 13, 0x00 }, { 14, 0x57 }, { 15, 0x00 },
+ { 16, 0x88 }, { 17, 0x88 }, { 18, 0x08 }, { 19, 0x08 }
+};
+
+static const int deemph_settings[] = {44100, 0, 48000, 32000};
+
+static int ak4641_set_deemph(struct snd_soc_codec *codec)
+{
+ struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
+ int i, best = 0;
+
+ for (i = 0 ; i < ARRAY_SIZE(deemph_settings); i++) {
+ /* if deemphasis is on, select the nearest available rate */
+ if (ak4641->deemph && deemph_settings[i] != 0 &&
+ abs(deemph_settings[i] - ak4641->playback_fs) <
+ abs(deemph_settings[best] - ak4641->playback_fs))
+ best = i;
+
+ if (!ak4641->deemph && deemph_settings[i] == 0)
+ best = i;
+ }
+
+ dev_dbg(codec->dev, "Set deemphasis %d\n", best);
+
+ return snd_soc_update_bits(codec, AK4641_DAC, 0x3, best);
+}
+
+static int ak4641_put_deemph(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
+ int deemph = ucontrol->value.integer.value[0];
+
+ if (deemph > 1)
+ return -EINVAL;
+
+ ak4641->deemph = deemph;
+
+ return ak4641_set_deemph(codec);
+}
+
+static int ak4641_get_deemph(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
+
+ ucontrol->value.integer.value[0] = ak4641->deemph;
+ return 0;
+};
+
+static const char *ak4641_mono_out[] = {"(L + R)/2", "Hi-Z"};
+static const char *ak4641_hp_out[] = {"Stereo", "Mono"};
+static const char *ak4641_mic_select[] = {"Internal", "External"};
+static const char *ak4641_mic_or_dac[] = {"Microphone", "Voice DAC"};
+
+
+static const DECLARE_TLV_DB_SCALE(mono_gain_tlv, -1700, 2300, 0);
+static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 2000, 0);
+static const DECLARE_TLV_DB_SCALE(eq_tlv, -1050, 150, 0);
+static const DECLARE_TLV_DB_SCALE(master_tlv, -12750, 50, 0);
+static const DECLARE_TLV_DB_SCALE(mic_stereo_sidetone_tlv, -2700, 300, 0);
+static const DECLARE_TLV_DB_SCALE(mic_mono_sidetone_tlv, -400, 400, 0);
+static const DECLARE_TLV_DB_SCALE(capture_tlv, -800, 50, 0);
+static const DECLARE_TLV_DB_SCALE(alc_tlv, -800, 50, 0);
+static const DECLARE_TLV_DB_SCALE(aux_in_tlv, -2100, 300, 0);
+
+
+static SOC_ENUM_SINGLE_DECL(ak4641_mono_out_enum,
+ AK4641_SIG1, 6, ak4641_mono_out);
+static SOC_ENUM_SINGLE_DECL(ak4641_hp_out_enum,
+ AK4641_MODE2, 2, ak4641_hp_out);
+static SOC_ENUM_SINGLE_DECL(ak4641_mic_select_enum,
+ AK4641_MIC, 1, ak4641_mic_select);
+static SOC_ENUM_SINGLE_DECL(ak4641_mic_or_dac_enum,
+ AK4641_BTIF, 4, ak4641_mic_or_dac);
+
+static const struct snd_kcontrol_new ak4641_snd_controls[] = {
+ SOC_ENUM("Mono 1 Output", ak4641_mono_out_enum),
+ SOC_SINGLE_TLV("Mono 1 Gain Volume", AK4641_SIG1, 7, 1, 1,
+ mono_gain_tlv),
+ SOC_ENUM("Headphone Output", ak4641_hp_out_enum),
+ SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
+ ak4641_get_deemph, ak4641_put_deemph),
+
+ SOC_SINGLE_TLV("Mic Boost Volume", AK4641_MIC, 0, 1, 0, mic_boost_tlv),
+
+ SOC_SINGLE("ALC Operation Time", AK4641_TIMER, 0, 3, 0),
+ SOC_SINGLE("ALC Recovery Time", AK4641_TIMER, 2, 3, 0),
+ SOC_SINGLE("ALC ZC Time", AK4641_TIMER, 4, 3, 0),
+
+ SOC_SINGLE("ALC 1 Switch", AK4641_ALC1, 5, 1, 0),
+
+ SOC_SINGLE_TLV("ALC Volume", AK4641_ALC2, 0, 71, 0, alc_tlv),
+ SOC_SINGLE("Left Out Enable Switch", AK4641_SIG2, 1, 1, 0),
+ SOC_SINGLE("Right Out Enable Switch", AK4641_SIG2, 0, 1, 0),
+
+ SOC_SINGLE_TLV("Capture Volume", AK4641_PGA, 0, 71, 0, capture_tlv),
+
+ SOC_DOUBLE_R_TLV("Master Playback Volume", AK4641_LATT,
+ AK4641_RATT, 0, 255, 1, master_tlv),
+
+ SOC_SINGLE_TLV("AUX In Volume", AK4641_VOL, 0, 15, 0, aux_in_tlv),
+
+ SOC_SINGLE("Equalizer Switch", AK4641_DAC, 2, 1, 0),
+ SOC_SINGLE_TLV("EQ1 100 Hz Volume", AK4641_EQLO, 0, 15, 1, eq_tlv),
+ SOC_SINGLE_TLV("EQ2 250 Hz Volume", AK4641_EQLO, 4, 15, 1, eq_tlv),
+ SOC_SINGLE_TLV("EQ3 1 kHz Volume", AK4641_EQMID, 0, 15, 1, eq_tlv),
+ SOC_SINGLE_TLV("EQ4 3.5 kHz Volume", AK4641_EQMID, 4, 15, 1, eq_tlv),
+ SOC_SINGLE_TLV("EQ5 10 kHz Volume", AK4641_EQHI, 0, 15, 1, eq_tlv),
+};
+
+/* Mono 1 Mixer */
+static const struct snd_kcontrol_new ak4641_mono1_mixer_controls[] = {
+ SOC_DAPM_SINGLE_TLV("Mic Mono Sidetone Volume", AK4641_VOL, 7, 1, 0,
+ mic_mono_sidetone_tlv),
+ SOC_DAPM_SINGLE("Mic Mono Sidetone Switch", AK4641_SIG1, 4, 1, 0),
+ SOC_DAPM_SINGLE("Mono Playback Switch", AK4641_SIG1, 5, 1, 0),
+};
+
+/* Stereo Mixer */
+static const struct snd_kcontrol_new ak4641_stereo_mixer_controls[] = {
+ SOC_DAPM_SINGLE_TLV("Mic Sidetone Volume", AK4641_VOL, 4, 7, 0,
+ mic_stereo_sidetone_tlv),
+ SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4641_SIG2, 4, 1, 0),
+ SOC_DAPM_SINGLE("Playback Switch", AK4641_SIG2, 7, 1, 0),
+ SOC_DAPM_SINGLE("Aux Bypass Switch", AK4641_SIG2, 5, 1, 0),
+};
+
+/* Input Mixer */
+static const struct snd_kcontrol_new ak4641_input_mixer_controls[] = {
+ SOC_DAPM_SINGLE("Mic Capture Switch", AK4641_MIC, 2, 1, 0),
+ SOC_DAPM_SINGLE("Aux Capture Switch", AK4641_MIC, 5, 1, 0),
+};
+
+/* Mic mux */
+static const struct snd_kcontrol_new ak4641_mic_mux_control =
+ SOC_DAPM_ENUM("Mic Select", ak4641_mic_select_enum);
+
+/* Input mux */
+static const struct snd_kcontrol_new ak4641_input_mux_control =
+ SOC_DAPM_ENUM("Input Select", ak4641_mic_or_dac_enum);
+
+/* mono 2 switch */
+static const struct snd_kcontrol_new ak4641_mono2_control =
+ SOC_DAPM_SINGLE("Switch", AK4641_SIG1, 0, 1, 0);
+
+/* ak4641 dapm widgets */
+static const struct snd_soc_dapm_widget ak4641_dapm_widgets[] = {
+ SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
+ &ak4641_stereo_mixer_controls[0],
+ ARRAY_SIZE(ak4641_stereo_mixer_controls)),
+ SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
+ &ak4641_mono1_mixer_controls[0],
+ ARRAY_SIZE(ak4641_mono1_mixer_controls)),
+ SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
+ &ak4641_input_mixer_controls[0],
+ ARRAY_SIZE(ak4641_input_mixer_controls)),
+ SND_SOC_DAPM_MUX("Mic Mux", SND_SOC_NOPM, 0, 0,
+ &ak4641_mic_mux_control),
+ SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
+ &ak4641_input_mux_control),
+ SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
+ &ak4641_mono2_control),
+
+ SND_SOC_DAPM_OUTPUT("LOUT"),
+ SND_SOC_DAPM_OUTPUT("ROUT"),
+ SND_SOC_DAPM_OUTPUT("MOUT1"),
+ SND_SOC_DAPM_OUTPUT("MOUT2"),
+ SND_SOC_DAPM_OUTPUT("MICOUT"),
+
+ SND_SOC_DAPM_ADC("ADC", "HiFi Capture", AK4641_PM1, 0, 0),
+ SND_SOC_DAPM_PGA("Mic", AK4641_PM1, 1, 0, NULL, 0),
+ SND_SOC_DAPM_PGA("AUX In", AK4641_PM1, 2, 0, NULL, 0),
+ SND_SOC_DAPM_PGA("Mono Out", AK4641_PM1, 3, 0, NULL, 0),
+ SND_SOC_DAPM_PGA("Line Out", AK4641_PM1, 4, 0, NULL, 0),
+
+ SND_SOC_DAPM_DAC("DAC", "HiFi Playback", AK4641_PM2, 0, 0),
+ SND_SOC_DAPM_PGA("Mono Out 2", AK4641_PM2, 3, 0, NULL, 0),
+
+ SND_SOC_DAPM_ADC("Voice ADC", "Voice Capture", AK4641_BTIF, 0, 0),
+ SND_SOC_DAPM_DAC("Voice DAC", "Voice Playback", AK4641_BTIF, 1, 0),
+
+ SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4641_MIC, 3, 0),
+ SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4641_MIC, 4, 0),
+
+ SND_SOC_DAPM_INPUT("MICIN"),
+ SND_SOC_DAPM_INPUT("MICEXT"),
+ SND_SOC_DAPM_INPUT("AUX"),
+ SND_SOC_DAPM_INPUT("AIN"),
+};
+
+static const struct snd_soc_dapm_route ak4641_audio_map[] = {
+ /* Stereo Mixer */
+ {"Stereo Mixer", "Playback Switch", "DAC"},
+ {"Stereo Mixer", "Mic Sidetone Switch", "Input Mux"},
+ {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
+
+ /* Mono 1 Mixer */
+ {"Mono1 Mixer", "Mic Mono Sidetone Switch", "Input Mux"},
+ {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
+
+ /* Mic */
+ {"Mic", NULL, "AIN"},
+ {"Mic Mux", "Internal", "Mic Int Bias"},
+ {"Mic Mux", "External", "Mic Ext Bias"},
+ {"Mic Int Bias", NULL, "MICIN"},
+ {"Mic Ext Bias", NULL, "MICEXT"},
+ {"MICOUT", NULL, "Mic Mux"},
+
+ /* Input Mux */
+ {"Input Mux", "Microphone", "Mic"},
+ {"Input Mux", "Voice DAC", "Voice DAC"},
+
+ /* Line Out */
+ {"LOUT", NULL, "Line Out"},
+ {"ROUT", NULL, "Line Out"},
+ {"Line Out", NULL, "Stereo Mixer"},
+
+ /* Mono 1 Out */
+ {"MOUT1", NULL, "Mono Out"},
+ {"Mono Out", NULL, "Mono1 Mixer"},
+
+ /* Mono 2 Out */
+ {"MOUT2", NULL, "Mono 2 Enable"},
+ {"Mono 2 Enable", "Switch", "Mono Out 2"},
+ {"Mono Out 2", NULL, "Stereo Mixer"},
+
+ {"Voice ADC", NULL, "Mono 2 Enable"},
+
+ /* Aux In */
+ {"AUX In", NULL, "AUX"},
+
+ /* ADC */
+ {"ADC", NULL, "Input Mixer"},
+ {"Input Mixer", "Mic Capture Switch", "Mic"},
+ {"Input Mixer", "Aux Capture Switch", "AUX In"},
+};
+
+static int ak4641_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
+
+ ak4641->sysclk = freq;
+ return 0;
+}
+
+static int ak4641_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
+ int rate = params_rate(params), fs = 256;
+ u8 mode2;
+
+ if (rate)
+ fs = ak4641->sysclk / rate;
+ else
+ return -EINVAL;
+
+ /* set fs */
+ switch (fs) {
+ case 1024:
+ mode2 = (0x2 << 5);
+ break;
+ case 512:
+ mode2 = (0x1 << 5);
+ break;
+ case 256:
+ mode2 = (0x0 << 5);
+ break;
+ default:
+ dev_err(codec->dev, "Error: unsupported fs=%d\n", fs);
+ return -EINVAL;
+ }
+
+ snd_soc_update_bits(codec, AK4641_MODE2, (0x3 << 5), mode2);
+
+ /* Update de-emphasis filter for the new rate */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ak4641->playback_fs = rate;
+ ak4641_set_deemph(codec);
+ }
+
+ return 0;
+}
+
+static int ak4641_pcm_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u8 btif;
+ int ret;
+
+ /* interface format */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ btif = (0x3 << 5);
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ btif = (0x2 << 5);
+ break;
+ case SND_SOC_DAIFMT_DSP_A: /* MSB after FRM */
+ btif = (0x0 << 5);
+ break;
+ case SND_SOC_DAIFMT_DSP_B: /* MSB during FRM */
+ btif = (0x1 << 5);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = snd_soc_update_bits(codec, AK4641_BTIF, (0x3 << 5), btif);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int ak4641_i2s_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u8 mode1 = 0;
+
+ /* interface format */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ mode1 = 0x02;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ mode1 = 0x01;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return snd_soc_write(codec, AK4641_MODE1, mode1);
+}
+
+static int ak4641_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_codec *codec = dai->codec;
+
+ return snd_soc_update_bits(codec, AK4641_DAC, 0x20, mute ? 0x20 : 0);
+}
+
+static int ak4641_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
+ struct ak4641_platform_data *pdata = codec->dev->platform_data;
+ int ret;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ /* unmute */
+ snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0);
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ /* mute */
+ snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0x20);
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+ if (pdata && gpio_is_valid(pdata->gpio_power))
+ gpio_set_value(pdata->gpio_power, 1);
+ mdelay(1);
+ if (pdata && gpio_is_valid(pdata->gpio_npdn))
+ gpio_set_value(pdata->gpio_npdn, 1);
+ mdelay(1);
+
+ ret = regcache_sync(ak4641->regmap);
+ if (ret) {
+ dev_err(codec->dev,
+ "Failed to sync cache: %d\n", ret);
+ return ret;
+ }
+ }
+ snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0x80);
+ snd_soc_update_bits(codec, AK4641_PM2, 0x80, 0);
+ break;
+ case SND_SOC_BIAS_OFF:
+ snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0);
+ if (pdata && gpio_is_valid(pdata->gpio_npdn))
+ gpio_set_value(pdata->gpio_npdn, 0);
+ if (pdata && gpio_is_valid(pdata->gpio_power))
+ gpio_set_value(pdata->gpio_power, 0);
+ regcache_mark_dirty(ak4641->regmap);
+ break;
+ }
+ codec->dapm.bias_level = level;
+ return 0;
+}
+
+#define AK4641_RATES (SNDRV_PCM_RATE_8000_48000)
+#define AK4641_RATES_BT (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
+ SNDRV_PCM_RATE_16000)
+#define AK4641_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
+
+static const struct snd_soc_dai_ops ak4641_i2s_dai_ops = {
+ .hw_params = ak4641_i2s_hw_params,
+ .set_fmt = ak4641_i2s_set_dai_fmt,
+ .digital_mute = ak4641_mute,
+ .set_sysclk = ak4641_set_dai_sysclk,
+};
+
+static const struct snd_soc_dai_ops ak4641_pcm_dai_ops = {
+ .hw_params = NULL, /* rates are controlled by BT chip */
+ .set_fmt = ak4641_pcm_set_dai_fmt,
+ .digital_mute = ak4641_mute,
+ .set_sysclk = ak4641_set_dai_sysclk,
+};
+
+static struct snd_soc_dai_driver ak4641_dai[] = {
+{
+ .name = "ak4641-hifi",
+ .id = 1,
+ .playback = {
+ .stream_name = "HiFi Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = AK4641_RATES,
+ .formats = AK4641_FORMATS,
+ },
+ .capture = {
+ .stream_name = "HiFi Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = AK4641_RATES,
+ .formats = AK4641_FORMATS,
+ },
+ .ops = &ak4641_i2s_dai_ops,
+ .symmetric_rates = 1,
+},
+{
+ .name = "ak4641-voice",
+ .id = 1,
+ .playback = {
+ .stream_name = "Voice Playback",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = AK4641_RATES_BT,
+ .formats = AK4641_FORMATS,
+ },
+ .capture = {
+ .stream_name = "Voice Capture",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = AK4641_RATES_BT,
+ .formats = AK4641_FORMATS,
+ },
+ .ops = &ak4641_pcm_dai_ops,
+ .symmetric_rates = 1,
+},
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_ak4641 = {
+ .controls = ak4641_snd_controls,
+ .num_controls = ARRAY_SIZE(ak4641_snd_controls),
+ .dapm_widgets = ak4641_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(ak4641_dapm_widgets),
+ .dapm_routes = ak4641_audio_map,
+ .num_dapm_routes = ARRAY_SIZE(ak4641_audio_map),
+ .set_bias_level = ak4641_set_bias_level,
+ .suspend_bias_off = true,
+};
+
+static const struct regmap_config ak4641_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = AK4641_BTIF,
+ .reg_defaults = ak4641_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(ak4641_reg_defaults),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int ak4641_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct ak4641_platform_data *pdata = i2c->dev.platform_data;
+ struct ak4641_priv *ak4641;
+ int ret;
+
+ ak4641 = devm_kzalloc(&i2c->dev, sizeof(struct ak4641_priv),
+ GFP_KERNEL);
+ if (!ak4641)
+ return -ENOMEM;
+
+ ak4641->regmap = devm_regmap_init_i2c(i2c, &ak4641_regmap);
+ if (IS_ERR(ak4641->regmap))
+ return PTR_ERR(ak4641->regmap);
+
+ if (pdata) {
+ if (gpio_is_valid(pdata->gpio_power)) {
+ ret = gpio_request_one(pdata->gpio_power,
+ GPIOF_OUT_INIT_LOW, "ak4641 power");
+ if (ret)
+ goto err_out;
+ }
+ if (gpio_is_valid(pdata->gpio_npdn)) {
+ ret = gpio_request_one(pdata->gpio_npdn,
+ GPIOF_OUT_INIT_LOW, "ak4641 npdn");
+ if (ret)
+ goto err_gpio;
+
+ udelay(1); /* > 150 ns */
+ gpio_set_value(pdata->gpio_npdn, 1);
+ }
+ }
+
+ i2c_set_clientdata(i2c, ak4641);
+
+ ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_ak4641,
+ ak4641_dai, ARRAY_SIZE(ak4641_dai));
+ if (ret != 0)
+ goto err_gpio2;
+
+ return 0;
+
+err_gpio2:
+ if (pdata) {
+ if (gpio_is_valid(pdata->gpio_power))
+ gpio_set_value(pdata->gpio_power, 0);
+ if (gpio_is_valid(pdata->gpio_npdn))
+ gpio_free(pdata->gpio_npdn);
+ }
+err_gpio:
+ if (pdata && gpio_is_valid(pdata->gpio_power))
+ gpio_free(pdata->gpio_power);
+err_out:
+ return ret;
+}
+
+static int ak4641_i2c_remove(struct i2c_client *i2c)
+{
+ struct ak4641_platform_data *pdata = i2c->dev.platform_data;
+
+ snd_soc_unregister_codec(&i2c->dev);
+
+ if (pdata) {
+ if (gpio_is_valid(pdata->gpio_power)) {
+ gpio_set_value(pdata->gpio_power, 0);
+ gpio_free(pdata->gpio_power);
+ }
+ if (gpio_is_valid(pdata->gpio_npdn))
+ gpio_free(pdata->gpio_npdn);
+ }
+
+ return 0;
+}
+
+static const struct i2c_device_id ak4641_i2c_id[] = {
+ { "ak4641", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ak4641_i2c_id);
+
+static struct i2c_driver ak4641_i2c_driver = {
+ .driver = {
+ .name = "ak4641",
+ .owner = THIS_MODULE,
+ },
+ .probe = ak4641_i2c_probe,
+ .remove = ak4641_i2c_remove,
+ .id_table = ak4641_i2c_id,
+};
+
+module_i2c_driver(ak4641_i2c_driver);
+
+MODULE_DESCRIPTION("SoC AK4641 driver");
+MODULE_AUTHOR("Harald Welte <laforge@gnufiish.org>");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff