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    Subject[PATCH v2 1/3] ASoC: Asahi Kasei AK4641 codec driver
    Date
    A driver for the AK4641 codec used in iPAQ hx4700 and Glofiish M800
    among others.

    Signed-off-by: Harald Welte <laforge@gnumonks.org>
    Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
    Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru>
    ---
    include/sound/ak4641.h | 26 ++
    sound/soc/codecs/Kconfig | 4 +
    sound/soc/codecs/Makefile | 2 +
    sound/soc/codecs/ak4641.c | 687 +++++++++++++++++++++++++++++++++++++++++++++
    sound/soc/codecs/ak4641.h | 47 +++
    5 files changed, 766 insertions(+), 0 deletions(-)
    create mode 100644 include/sound/ak4641.h
    create mode 100644 sound/soc/codecs/ak4641.c
    create mode 100644 sound/soc/codecs/ak4641.h

    diff --git a/include/sound/ak4641.h b/include/sound/ak4641.h
    new file mode 100644
    index 0000000..96d1991
    --- /dev/null
    +++ b/include/sound/ak4641.h
    @@ -0,0 +1,26 @@
    +/*
    + * AK4641 ALSA SoC Codec driver
    + *
    + * Copyright 2009 Philipp Zabel
    + *
    + * 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.
    + */
    +
    +#ifndef __AK4641_H
    +#define __AK4641_H
    +
    +/**
    + * struct ak4641_platform_data - platform specific AK4641 configuration
    + * @gpio_power: GPIO to control external power to AK4641
    + * @gpio_npdn: GPIO connected to AK4641 nPDN pin
    + *
    + * Both GPIO parameters are optional.
    + */
    +struct ak4641_platform_data {
    + int gpio_power;
    + int gpio_npdn;
    +};
    +
    +#endif /* __AK4641_H */
    diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
    index 2a69718..98175a0 100644
    --- a/sound/soc/codecs/Kconfig
    +++ b/sound/soc/codecs/Kconfig
    @@ -20,6 +20,7 @@ config SND_SOC_ALL_CODECS
    select SND_SOC_ADS117X
    select SND_SOC_AK4104 if SPI_MASTER
    select SND_SOC_AK4535 if I2C
    + select SND_SOC_AK4641 if I2C
    select SND_SOC_AK4642 if I2C
    select SND_SOC_AK4671 if I2C
    select SND_SOC_ALC5623 if I2C
    @@ -139,6 +140,9 @@ config SND_SOC_AK4104
    config SND_SOC_AK4535
    tristate

    +config SND_SOC_AK4641
    + tristate
    +
    config SND_SOC_AK4642
    tristate

    diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
    index 4cb2f42..fd85584 100644
    --- a/sound/soc/codecs/Makefile
    +++ b/sound/soc/codecs/Makefile
    @@ -7,6 +7,7 @@ snd-soc-ad73311-objs := ad73311.o
    snd-soc-ads117x-objs := ads117x.o
    snd-soc-ak4104-objs := ak4104.o
    snd-soc-ak4535-objs := ak4535.o
    +snd-soc-ak4641-objs := ak4641.o
    snd-soc-ak4642-objs := ak4642.o
    snd-soc-ak4671-objs := ak4671.o
    snd-soc-cq93vc-objs := cq93vc.o
    @@ -97,6 +98,7 @@ obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o
    obj-$(CONFIG_SND_SOC_ADS117X) += snd-soc-ads117x.o
    obj-$(CONFIG_SND_SOC_AK4104) += snd-soc-ak4104.o
    obj-$(CONFIG_SND_SOC_AK4535) += snd-soc-ak4535.o
    +obj-$(CONFIG_SND_SOC_AK4641) += snd-soc-ak4641.o
    obj-$(CONFIG_SND_SOC_AK4642) += snd-soc-ak4642.o
    obj-$(CONFIG_SND_SOC_AK4671) += snd-soc-ak4671.o
    obj-$(CONFIG_SND_SOC_ALC5623) += snd-soc-alc5623.o
    diff --git a/sound/soc/codecs/ak4641.c b/sound/soc/codecs/ak4641.c
    new file mode 100644
    index 0000000..07e4d7a
    --- /dev/null
    +++ b/sound/soc/codecs/ak4641.c
    @@ -0,0 +1,687 @@
    +/*
    + * 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/platform_device.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 snd_soc_codec *codec;
    + unsigned int sysclk;
    + int deemph;
    + int playback_fs;
    +};
    +
    +/*
    + * ak4641 register cache
    + */
    +static const u8 ak4641_reg[AK4641_CACHEREGNUM] = {
    + 0x00, 0x80, 0x00, 0x80,
    + 0x02, 0x00, 0x11, 0x05,
    + 0x00, 0x00, 0x36, 0x10,
    + 0x00, 0x00, 0x57, 0x00,
    + 0x88, 0x88, 0x08, 0x08
    +};
    +
    +
    +static int ak4641_sync(struct snd_soc_codec *codec)
    +{
    + u8 *cache = codec->reg_cache;
    + int i, r = 0;
    +
    + for (i = 0; i < AK4641_CACHEREGNUM; i++)
    + r |= snd_soc_write(codec, i, cache[i]);
    +
    + return r;
    +};
    +
    +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_kcontrol_chip(kcontrol);
    + struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
    + int deemph = ucontrol->value.enumerated.item[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_kcontrol_chip(kcontrol);
    + struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
    +
    + ucontrol->value.enumerated.item[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 const struct soc_enum ak4641_mono_out_enum =
    + SOC_ENUM_SINGLE(AK4641_SIG1, 6, 2, ak4641_mono_out);
    +static const struct soc_enum ak4641_hp_out_enum =
    + SOC_ENUM_SINGLE(AK4641_MODE2, 2, 2, ak4641_hp_out);
    +static const struct soc_enum ak4641_mic_select_enum =
    + SOC_ENUM_SINGLE(AK4641_MIC, 1, 2, ak4641_mic_select);
    +static const struct soc_enum ak4641_mic_or_dac_enum =
    + SOC_ENUM_SINGLE(AK4641_BTIF, 4, 2, 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_ADC("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 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_add_widgets(struct snd_soc_codec *codec)
    +{
    + struct snd_soc_dapm_context *dapm = &codec->dapm;
    + snd_soc_dapm_new_controls(dapm, ak4641_dapm_widgets,
    + ARRAY_SIZE(ak4641_dapm_widgets));
    +
    + snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
    +
    + snd_soc_dapm_new_widgets(dapm);
    + return 0;
    +}
    +
    +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_pcm_runtime *rtd = substream->private_data;
    + struct snd_soc_codec *codec = rtd->codec;
    + struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
    + u8 mode2 = snd_soc_read(codec, AK4641_MODE2) & ~(0x3 << 5);
    + int rate = params_rate(params), fs = 256;
    +
    + 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:
    + break;
    + default:
    + dev_err(codec->dev, "Error: unsupported fs=%d\n", fs);
    + return -EINVAL;
    + }
    +
    + /* set rate */
    + snd_soc_write(codec, AK4641_MODE2, 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 = snd_soc_read(codec, AK4641_BTIF) & ~(0x3 << 5);
    +
    + /* 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;
    + }
    +
    + snd_soc_write(codec, AK4641_BTIF, btif);
    + 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 = 0x0002;
    + break;
    + case SND_SOC_DAIFMT_LEFT_J:
    + mode1 = 0x0001;
    + break;
    + default:
    + return -EINVAL;
    + }
    +
    + snd_soc_write(codec, AK4641_MODE1, mode1);
    + return 0;
    +}
    +
    +static int ak4641_mute(struct snd_soc_dai *dai, int mute)
    +{
    + struct snd_soc_codec *codec = dai->codec;
    + u16 mute_reg = snd_soc_read(codec, AK4641_DAC);
    + if (!mute)
    + snd_soc_write(codec, AK4641_DAC, mute_reg & ~0x20);
    + else
    + snd_soc_write(codec, AK4641_DAC, mute_reg | 0x20);
    + return 0;
    +}
    +
    +static int ak4641_set_bias_level(struct snd_soc_codec *codec,
    + enum snd_soc_bias_level level)
    +{
    + struct ak4641_platform_data *pdata = codec->dev->platform_data;
    + u16 i, mute_reg;
    +
    + switch (level) {
    + case SND_SOC_BIAS_ON:
    + mute_reg = snd_soc_read(codec, AK4641_DAC);
    + snd_soc_write(codec, AK4641_DAC, mute_reg & ~0x20) ;
    + break;
    + case SND_SOC_BIAS_PREPARE:
    + mute_reg = snd_soc_read(codec, AK4641_DAC);
    + snd_soc_write(codec, AK4641_DAC, mute_reg | 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);
    + ak4641_sync(codec);
    + }
    + i = snd_soc_read(codec, AK4641_PM1);
    + snd_soc_write(codec, AK4641_PM1, i | 0x80);
    + i = snd_soc_read(codec, AK4641_PM2);
    + snd_soc_write(codec, AK4641_PM2, i & (~0x80));
    + break;
    + case SND_SOC_BIAS_OFF:
    + i = snd_soc_read(codec, AK4641_PM1);
    + snd_soc_write(codec, AK4641_PM1, i & (~0x80));
    + 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);
    + 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 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 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,
    +};
    +
    +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 int ak4641_suspend(struct snd_soc_codec *codec, pm_message_t state)
    +{
    + ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
    + return 0;
    +}
    +
    +static int ak4641_resume(struct snd_soc_codec *codec)
    +{
    + ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
    + return 0;
    +}
    +
    +static int ak4641_probe(struct snd_soc_codec *codec)
    +{
    + struct ak4641_platform_data *pdata = codec->dev->platform_data;
    + int ret;
    +
    +
    + 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);
    + }
    + }
    +
    + ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
    + if (ret != 0) {
    + dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
    + goto err_register;
    + }
    +
    + /* power on device */
    + ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
    + snd_soc_add_controls(codec, ak4641_snd_controls,
    + ARRAY_SIZE(ak4641_snd_controls));
    + ak4641_add_widgets(codec);
    +
    + return 0;
    +
    +err_register:
    + 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_remove(struct snd_soc_codec *codec)
    +{
    + struct ak4641_platform_data *pdata = codec->dev->platform_data;
    +
    + ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
    +
    + 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 struct snd_soc_codec_driver soc_codec_dev_ak4641 = {
    + .probe = ak4641_probe,
    + .remove = ak4641_remove,
    + .suspend = ak4641_suspend,
    + .resume = ak4641_resume,
    + .set_bias_level = ak4641_set_bias_level,
    + .reg_cache_size = ARRAY_SIZE(ak4641_reg),
    + .reg_word_size = sizeof(u8),
    + .reg_cache_default = ak4641_reg,
    + .reg_cache_step = 1,
    +};
    +
    +
    +static int __devinit ak4641_i2c_probe(struct i2c_client *i2c,
    + const struct i2c_device_id *id)
    +{
    + struct ak4641_priv *ak4641;
    + int ret;
    +
    + ak4641 = kzalloc(sizeof(struct ak4641_priv), GFP_KERNEL);
    + if (!ak4641)
    + return -ENOMEM;
    +
    + 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)
    + kfree(ak4641);
    +
    + return ret;
    +}
    +
    +static int __devexit ak4641_i2c_remove(struct i2c_client *i2c)
    +{
    + snd_soc_unregister_codec(&i2c->dev);
    + kfree(i2c_get_clientdata(i2c));
    + 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 = __devexit_p(ak4641_i2c_remove),
    + .id_table = ak4641_i2c_id,
    +};
    +
    +static int __init ak4641_modinit(void)
    +{
    + int ret;
    +
    + ret = i2c_add_driver(&ak4641_i2c_driver);
    + if (ret != 0)
    + pr_err("Failed to register AK4641 I2C driver: %d\n", ret);
    +
    + return ret;
    +}
    +module_init(ak4641_modinit);
    +
    +static void __exit ak4641_exit(void)
    +{
    + i2c_del_driver(&ak4641_i2c_driver);
    +}
    +module_exit(ak4641_exit);
    +
    +MODULE_DESCRIPTION("SoC AK4641 driver");
    +MODULE_AUTHOR("Harald Welte <laforge@gnufiish.org>");
    +MODULE_LICENSE("GPL");
    diff --git a/sound/soc/codecs/ak4641.h b/sound/soc/codecs/ak4641.h
    new file mode 100644
    index 0000000..4a26324
    --- /dev/null
    +++ b/sound/soc/codecs/ak4641.h
    @@ -0,0 +1,47 @@
    +/*
    + * ak4641.h -- AK4641 SoC Audio driver
    + *
    + * Copyright 2008 Harald Welte <laforge@gnufiish.org>
    + *
    + * Based on ak4535.h
    + *
    + * 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.
    + */
    +
    +#ifndef _AK4641_H
    +#define _AK4641_H
    +
    +/* AK4641 register space */
    +
    +#define AK4641_PM1 0x00
    +#define AK4641_PM2 0x01
    +#define AK4641_SIG1 0x02
    +#define AK4641_SIG2 0x03
    +#define AK4641_MODE1 0x04
    +#define AK4641_MODE2 0x05
    +#define AK4641_DAC 0x06
    +#define AK4641_MIC 0x07
    +#define AK4641_TIMER 0x08
    +#define AK4641_ALC1 0x09
    +#define AK4641_ALC2 0x0a
    +#define AK4641_PGA 0x0b
    +#define AK4641_LATT 0x0c
    +#define AK4641_RATT 0x0d
    +#define AK4641_VOL 0x0e
    +#define AK4641_STATUS 0x0f
    +#define AK4641_EQLO 0x10
    +#define AK4641_EQMID 0x11
    +#define AK4641_EQHI 0x12
    +#define AK4641_BTIF 0x13
    +
    +#define AK4641_CACHEREGNUM 0x14
    +
    +
    +
    +#define AK4641_DAI_HIFI 0
    +#define AK4641_DAI_VOICE 1
    +
    +
    +#endif
    --
    1.7.4.rc1


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