sound/soc/codecs/ak4641.c

   1 /*
   2  * ak4641.c  --  AK4641 ALSA Soc Audio driver
   3  *
   4  * Copyright (C) 2008 Harald Welte <laforge@gnufiish.org>
   5  * Copyright (C) 2011 Dmitry Artamonow <mad_soft@inbox.ru>
   6  *
   7  * Based on ak4535.c by Richard Purdie
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/delay.h>
  17 #include <linux/gpio.h>
  18 #include <linux/pm.h>
  19 #include <linux/i2c.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/slab.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/initval.h>
  27 #include <sound/tlv.h>
  28 #include <sound/ak4641.h>
  29
  30 #include "ak4641.h"
  31
  32 /* codec private data */
  33 struct ak4641_priv {
  34         struct snd_soc_codec *codec;
  35         unsigned int sysclk;
  36         int deemph;
  37         int playback_fs;
  38 };
  39
  40 /*
  41  * ak4641 register cache
  42  */
  43 static const u8 ak4641_reg[AK4641_CACHEREGNUM] = {
  44         0x00, 0x80, 0x00, 0x80,
  45         0x02, 0x00, 0x11, 0x05,
  46         0x00, 0x00, 0x36, 0x10,
  47         0x00, 0x00, 0x57, 0x00,
  48         0x88, 0x88, 0x08, 0x08
  49 };
  50
  51 static const int deemph_settings[] = {44100, 0, 48000, 32000};
  52
  53 static int ak4641_set_deemph(struct snd_soc_codec *codec)
  54 {
  55         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
  56         int i, best = 0;
  57
  58         for (i = 0 ; i < ARRAY_SIZE(deemph_settings); i++) {
  59                 /* if deemphasis is on, select the nearest available rate */
  60                 if (ak4641->deemph && deemph_settings[i] != 0 &&
  61                     abs(deemph_settings[i] - ak4641->playback_fs) <
  62                     abs(deemph_settings[best] - ak4641->playback_fs))
  63                         best = i;
  64
  65                 if (!ak4641->deemph && deemph_settings[i] == 0)
  66                         best = i;
  67         }
  68
  69         dev_dbg(codec->dev, "Set deemphasis %d\n", best);
  70
  71         return snd_soc_update_bits(codec, AK4641_DAC, 0x3, best);
  72 }
  73
  74 static int ak4641_put_deemph(struct snd_kcontrol *kcontrol,
  75                                 struct snd_ctl_elem_value *ucontrol)
  76 {
  77         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  78         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
  79         int deemph = ucontrol->value.enumerated.item[0];
  80
  81         if (deemph > 1)
  82                 return -EINVAL;
  83
  84         ak4641->deemph = deemph;
  85
  86         return ak4641_set_deemph(codec);
  87 }
  88
  89 static int ak4641_get_deemph(struct snd_kcontrol *kcontrol,
  90                                 struct snd_ctl_elem_value *ucontrol)
  91 {
  92         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  93         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
  94
  95         ucontrol->value.enumerated.item[0] = ak4641->deemph;
  96         return 0;
  97 };
  98
  99 static const char *ak4641_mono_out[] = {"(L + R)/2", "Hi-Z"};
 100 static const char *ak4641_hp_out[] = {"Stereo", "Mono"};
 101 static const char *ak4641_mic_select[] = {"Internal", "External"};
 102 static const char *ak4641_mic_or_dac[] = {"Microphone", "Voice DAC"};
 103
 104
 105 static const DECLARE_TLV_DB_SCALE(mono_gain_tlv, -1700, 2300, 0);
 106 static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 2000, 0);
 107 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1050, 150, 0);
 108 static const DECLARE_TLV_DB_SCALE(master_tlv, -12750, 50, 0);
 109 static const DECLARE_TLV_DB_SCALE(mic_stereo_sidetone_tlv, -2700, 300, 0);
 110 static const DECLARE_TLV_DB_SCALE(mic_mono_sidetone_tlv, -400, 400, 0);
 111 static const DECLARE_TLV_DB_SCALE(capture_tlv, -800, 50, 0);
 112 static const DECLARE_TLV_DB_SCALE(alc_tlv, -800, 50, 0);
 113 static const DECLARE_TLV_DB_SCALE(aux_in_tlv, -2100, 300, 0);
 114
 115
 116 static const struct soc_enum ak4641_mono_out_enum =
 117         SOC_ENUM_SINGLE(AK4641_SIG1, 6, 2, ak4641_mono_out);
 118 static const struct soc_enum ak4641_hp_out_enum =
 119         SOC_ENUM_SINGLE(AK4641_MODE2, 2, 2, ak4641_hp_out);
 120 static const struct soc_enum ak4641_mic_select_enum =
 121         SOC_ENUM_SINGLE(AK4641_MIC, 1, 2, ak4641_mic_select);
 122 static const struct soc_enum ak4641_mic_or_dac_enum =
 123         SOC_ENUM_SINGLE(AK4641_BTIF, 4, 2, ak4641_mic_or_dac);
 124
 125 static const struct snd_kcontrol_new ak4641_snd_controls[] = {
 126         SOC_ENUM("Mono 1 Output", ak4641_mono_out_enum),
 127         SOC_SINGLE_TLV("Mono 1 Gain Volume", AK4641_SIG1, 7, 1, 1,
 128                                                         mono_gain_tlv),
 129         SOC_ENUM("Headphone Output", ak4641_hp_out_enum),
 130         SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 131                                         ak4641_get_deemph, ak4641_put_deemph),
 132
 133         SOC_SINGLE_TLV("Mic Boost Volume", AK4641_MIC, 0, 1, 0, mic_boost_tlv),
 134
 135         SOC_SINGLE("ALC Operation Time", AK4641_TIMER, 0, 3, 0),
 136         SOC_SINGLE("ALC Recovery Time", AK4641_TIMER, 2, 3, 0),
 137         SOC_SINGLE("ALC ZC Time", AK4641_TIMER, 4, 3, 0),
 138
 139         SOC_SINGLE("ALC 1 Switch", AK4641_ALC1, 5, 1, 0),
 140
 141         SOC_SINGLE_TLV("ALC Volume", AK4641_ALC2, 0, 71, 0, alc_tlv),
 142         SOC_SINGLE("Left Out Enable Switch", AK4641_SIG2, 1, 1, 0),
 143         SOC_SINGLE("Right Out Enable Switch", AK4641_SIG2, 0, 1, 0),
 144
 145         SOC_SINGLE_TLV("Capture Volume", AK4641_PGA, 0, 71, 0, capture_tlv),
 146
 147         SOC_DOUBLE_R_TLV("Master Playback Volume", AK4641_LATT,
 148                                 AK4641_RATT, 0, 255, 1, master_tlv),
 149
 150         SOC_SINGLE_TLV("AUX In Volume", AK4641_VOL, 0, 15, 0, aux_in_tlv),
 151
 152         SOC_SINGLE("Equalizer Switch", AK4641_DAC, 2, 1, 0),
 153         SOC_SINGLE_TLV("EQ1 100 Hz Volume", AK4641_EQLO, 0, 15, 1, eq_tlv),
 154         SOC_SINGLE_TLV("EQ2 250 Hz Volume", AK4641_EQLO, 4, 15, 1, eq_tlv),
 155         SOC_SINGLE_TLV("EQ3 1 kHz Volume", AK4641_EQMID, 0, 15, 1, eq_tlv),
 156         SOC_SINGLE_TLV("EQ4 3.5 kHz Volume", AK4641_EQMID, 4, 15, 1, eq_tlv),
 157         SOC_SINGLE_TLV("EQ5 10 kHz Volume", AK4641_EQHI, 0, 15, 1, eq_tlv),
 158 };
 159
 160 /* Mono 1 Mixer */
 161 static const struct snd_kcontrol_new ak4641_mono1_mixer_controls[] = {
 162         SOC_DAPM_SINGLE_TLV("Mic Mono Sidetone Volume", AK4641_VOL, 7, 1, 0,
 163                                                 mic_mono_sidetone_tlv),
 164         SOC_DAPM_SINGLE("Mic Mono Sidetone Switch", AK4641_SIG1, 4, 1, 0),
 165         SOC_DAPM_SINGLE("Mono Playback Switch", AK4641_SIG1, 5, 1, 0),
 166 };
 167
 168 /* Stereo Mixer */
 169 static const struct snd_kcontrol_new ak4641_stereo_mixer_controls[] = {
 170         SOC_DAPM_SINGLE_TLV("Mic Sidetone Volume", AK4641_VOL, 4, 7, 0,
 171                                                 mic_stereo_sidetone_tlv),
 172         SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4641_SIG2, 4, 1, 0),
 173         SOC_DAPM_SINGLE("Playback Switch", AK4641_SIG2, 7, 1, 0),
 174         SOC_DAPM_SINGLE("Aux Bypass Switch", AK4641_SIG2, 5, 1, 0),
 175 };
 176
 177 /* Input Mixer */
 178 static const struct snd_kcontrol_new ak4641_input_mixer_controls[] = {
 179         SOC_DAPM_SINGLE("Mic Capture Switch", AK4641_MIC, 2, 1, 0),
 180         SOC_DAPM_SINGLE("Aux Capture Switch", AK4641_MIC, 5, 1, 0),
 181 };
 182
 183 /* Mic mux */
 184 static const struct snd_kcontrol_new ak4641_mic_mux_control =
 185         SOC_DAPM_ENUM("Mic Select", ak4641_mic_select_enum);
 186
 187 /* Input mux */
 188 static const struct snd_kcontrol_new ak4641_input_mux_control =
 189         SOC_DAPM_ENUM("Input Select", ak4641_mic_or_dac_enum);
 190
 191 /* mono 2 switch */
 192 static const struct snd_kcontrol_new ak4641_mono2_control =
 193         SOC_DAPM_SINGLE("Switch", AK4641_SIG1, 0, 1, 0);
 194
 195 /* ak4641 dapm widgets */
 196 static const struct snd_soc_dapm_widget ak4641_dapm_widgets[] = {
 197         SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
 198                 &ak4641_stereo_mixer_controls[0],
 199                 ARRAY_SIZE(ak4641_stereo_mixer_controls)),
 200         SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
 201                 &ak4641_mono1_mixer_controls[0],
 202                 ARRAY_SIZE(ak4641_mono1_mixer_controls)),
 203         SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
 204                 &ak4641_input_mixer_controls[0],
 205                 ARRAY_SIZE(ak4641_input_mixer_controls)),
 206         SND_SOC_DAPM_MUX("Mic Mux", SND_SOC_NOPM, 0, 0,
 207                 &ak4641_mic_mux_control),
 208         SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
 209                 &ak4641_input_mux_control),
 210         SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
 211                 &ak4641_mono2_control),
 212
 213         SND_SOC_DAPM_OUTPUT("LOUT"),
 214         SND_SOC_DAPM_OUTPUT("ROUT"),
 215         SND_SOC_DAPM_OUTPUT("MOUT1"),
 216         SND_SOC_DAPM_OUTPUT("MOUT2"),
 217         SND_SOC_DAPM_OUTPUT("MICOUT"),
 218
 219         SND_SOC_DAPM_ADC("ADC", "HiFi Capture", AK4641_PM1, 0, 0),
 220         SND_SOC_DAPM_PGA("Mic", AK4641_PM1, 1, 0, NULL, 0),
 221         SND_SOC_DAPM_PGA("AUX In", AK4641_PM1, 2, 0, NULL, 0),
 222         SND_SOC_DAPM_PGA("Mono Out", AK4641_PM1, 3, 0, NULL, 0),
 223         SND_SOC_DAPM_PGA("Line Out", AK4641_PM1, 4, 0, NULL, 0),
 224
 225         SND_SOC_DAPM_DAC("DAC", "HiFi Playback", AK4641_PM2, 0, 0),
 226         SND_SOC_DAPM_PGA("Mono Out 2", AK4641_PM2, 3, 0, NULL, 0),
 227
 228         SND_SOC_DAPM_ADC("Voice ADC", "Voice Capture", AK4641_BTIF, 0, 0),
 229         SND_SOC_DAPM_ADC("Voice DAC", "Voice Playback", AK4641_BTIF, 1, 0),
 230
 231         SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4641_MIC, 3, 0),
 232         SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4641_MIC, 4, 0),
 233
 234         SND_SOC_DAPM_INPUT("MICIN"),
 235         SND_SOC_DAPM_INPUT("MICEXT"),
 236         SND_SOC_DAPM_INPUT("AUX"),
 237         SND_SOC_DAPM_INPUT("AIN"),
 238 };
 239
 240 static const struct snd_soc_dapm_route ak4641_audio_map[] = {
 241         /* Stereo Mixer */
 242         {"Stereo Mixer", "Playback Switch", "DAC"},
 243         {"Stereo Mixer", "Mic Sidetone Switch", "Input Mux"},
 244         {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
 245
 246         /* Mono 1 Mixer */
 247         {"Mono1 Mixer", "Mic Mono Sidetone Switch", "Input Mux"},
 248         {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
 249
 250         /* Mic */
 251         {"Mic", NULL, "AIN"},
 252         {"Mic Mux", "Internal", "Mic Int Bias"},
 253         {"Mic Mux", "External", "Mic Ext Bias"},
 254         {"Mic Int Bias", NULL, "MICIN"},
 255         {"Mic Ext Bias", NULL, "MICEXT"},
 256         {"MICOUT", NULL, "Mic Mux"},
 257
 258         /* Input Mux */
 259         {"Input Mux", "Microphone", "Mic"},
 260         {"Input Mux", "Voice DAC", "Voice DAC"},
 261
 262         /* Line Out */
 263         {"LOUT", NULL, "Line Out"},
 264         {"ROUT", NULL, "Line Out"},
 265         {"Line Out", NULL, "Stereo Mixer"},
 266
 267         /* Mono 1 Out */
 268         {"MOUT1", NULL, "Mono Out"},
 269         {"Mono Out", NULL, "Mono1 Mixer"},
 270
 271         /* Mono 2 Out */
 272         {"MOUT2", NULL, "Mono 2 Enable"},
 273         {"Mono 2 Enable", "Switch", "Mono Out 2"},
 274         {"Mono Out 2", NULL, "Stereo Mixer"},
 275
 276         {"Voice ADC", NULL, "Mono 2 Enable"},
 277
 278         /* Aux In */
 279         {"AUX In", NULL, "AUX"},
 280
 281         /* ADC */
 282         {"ADC", NULL, "Input Mixer"},
 283         {"Input Mixer", "Mic Capture Switch", "Mic"},
 284         {"Input Mixer", "Aux Capture Switch", "AUX In"},
 285 };
 286
 287 static int ak4641_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 288         int clk_id, unsigned int freq, int dir)
 289 {
 290         struct snd_soc_codec *codec = codec_dai->codec;
 291         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
 292
 293         ak4641->sysclk = freq;
 294         return 0;
 295 }
 296
 297 static int ak4641_i2s_hw_params(struct snd_pcm_substream *substream,
 298                                  struct snd_pcm_hw_params *params,
 299                                  struct snd_soc_dai *dai)
 300 {
 301         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 302         struct snd_soc_codec *codec = rtd->codec;
 303         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
 304         int rate = params_rate(params), fs = 256;
 305         u8 mode2;
 306
 307         if (rate)
 308                 fs = ak4641->sysclk / rate;
 309         else
 310                 return -EINVAL;
 311
 312         /* set fs */
 313         switch (fs) {
 314         case 1024:
 315                 mode2 = (0x2 << 5);
 316                 break;
 317         case 512:
 318                 mode2 = (0x1 << 5);
 319                 break;
 320         case 256:
 321                 mode2 = (0x0 << 5);
 322                 break;
 323         default:
 324                 dev_err(codec->dev, "Error: unsupported fs=%d\n", fs);
 325                 return -EINVAL;
 326         }
 327
 328         snd_soc_update_bits(codec, AK4641_MODE2, (0x3 << 5), mode2);
 329
 330         /* Update de-emphasis filter for the new rate */
 331         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 332                 ak4641->playback_fs = rate;
 333                 ak4641_set_deemph(codec);
 334         };
 335
 336         return 0;
 337 }
 338
 339 static int ak4641_pcm_set_dai_fmt(struct snd_soc_dai *codec_dai,
 340                                   unsigned int fmt)
 341 {
 342         struct snd_soc_codec *codec = codec_dai->codec;
 343         u8 btif;
 344
 345         /* interface format */
 346         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 347         case SND_SOC_DAIFMT_I2S:
 348                 btif = (0x3 << 5);
 349                 break;
 350         case SND_SOC_DAIFMT_LEFT_J:
 351                 btif = (0x2 << 5);
 352                 break;
 353         case SND_SOC_DAIFMT_DSP_A:      /* MSB after FRM */
 354                 btif = (0x0 << 5);
 355                 break;
 356         case SND_SOC_DAIFMT_DSP_B:      /* MSB during FRM */
 357                 btif = (0x1 << 5);
 358                 break;
 359         default:
 360                 return -EINVAL;
 361         }
 362
 363         return snd_soc_update_bits(codec, AK4641_BTIF, (0x3 << 5), btif);
 364 }
 365
 366 static int ak4641_i2s_set_dai_fmt(struct snd_soc_dai *codec_dai,
 367                 unsigned int fmt)
 368 {
 369         struct snd_soc_codec *codec = codec_dai->codec;
 370         u8 mode1 = 0;
 371
 372         /* interface format */
 373         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 374         case SND_SOC_DAIFMT_I2S:
 375                 mode1 = 0x02;
 376                 break;
 377         case SND_SOC_DAIFMT_LEFT_J:
 378                 mode1 = 0x01;
 379                 break;
 380         default:
 381                 return -EINVAL;
 382         }
 383
 384         return snd_soc_write(codec, AK4641_MODE1, mode1);
 385 }
 386
 387 static int ak4641_mute(struct snd_soc_dai *dai, int mute)
 388 {
 389         struct snd_soc_codec *codec = dai->codec;
 390
 391         return snd_soc_update_bits(codec, AK4641_DAC, 0x20, mute ? 0x20 : 0);
 392 }
 393
 394 static int ak4641_set_bias_level(struct snd_soc_codec *codec,
 395         enum snd_soc_bias_level level)
 396 {
 397         struct ak4641_platform_data *pdata = codec->dev->platform_data;
 398         int ret;
 399
 400         switch (level) {
 401         case SND_SOC_BIAS_ON:
 402                 /* unmute */
 403                 snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0);
 404                 break;
 405         case SND_SOC_BIAS_PREPARE:
 406                 /* mute */
 407                 snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0x20);
 408                 break;
 409         case SND_SOC_BIAS_STANDBY:
 410                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 411                         if (pdata && gpio_is_valid(pdata->gpio_power))
 412                                 gpio_set_value(pdata->gpio_power, 1);
 413                         mdelay(1);
 414                         if (pdata && gpio_is_valid(pdata->gpio_npdn))
 415                                 gpio_set_value(pdata->gpio_npdn, 1);
 416                         mdelay(1);
 417
 418                         ret = snd_soc_cache_sync(codec);
 419                         if (ret) {
 420                                 dev_err(codec->dev,
 421                                         "Failed to sync cache: %d\n", ret);
 422                                 return ret;
 423                         }
 424                 }
 425                 snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0x80);
 426                 snd_soc_update_bits(codec, AK4641_PM2, 0x80, 0);
 427                 break;
 428         case SND_SOC_BIAS_OFF:
 429                 snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0);
 430                 if (pdata && gpio_is_valid(pdata->gpio_npdn))
 431                         gpio_set_value(pdata->gpio_npdn, 0);
 432                 if (pdata && gpio_is_valid(pdata->gpio_power))
 433                         gpio_set_value(pdata->gpio_power, 0);
 434                 codec->cache_sync = 1;
 435                 break;
 436         }
 437         codec->dapm.bias_level = level;
 438         return 0;
 439 }
 440
 441 #define AK4641_RATES    (SNDRV_PCM_RATE_8000_48000)
 442 #define AK4641_RATES_BT (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 443                          SNDRV_PCM_RATE_16000)
 444 #define AK4641_FORMATS  (SNDRV_PCM_FMTBIT_S16_LE)
 445
 446 static struct snd_soc_dai_ops ak4641_i2s_dai_ops = {
 447         .hw_params    = ak4641_i2s_hw_params,
 448         .set_fmt      = ak4641_i2s_set_dai_fmt,
 449         .digital_mute = ak4641_mute,
 450         .set_sysclk   = ak4641_set_dai_sysclk,
 451 };
 452
 453 static struct snd_soc_dai_ops ak4641_pcm_dai_ops = {
 454         .hw_params    = NULL, /* rates are controlled by BT chip */
 455         .set_fmt      = ak4641_pcm_set_dai_fmt,
 456         .digital_mute = ak4641_mute,
 457         .set_sysclk   = ak4641_set_dai_sysclk,
 458 };
 459
 460 static struct snd_soc_dai_driver ak4641_dai[] = {
 461 {
 462         .name = "ak4641-hifi",
 463         .id = 1,
 464         .playback = {
 465                 .stream_name = "HiFi Playback",
 466                 .channels_min = 1,
 467                 .channels_max = 2,
 468                 .rates = AK4641_RATES,
 469                 .formats = AK4641_FORMATS,
 470         },
 471         .capture = {
 472                 .stream_name = "HiFi Capture",
 473                 .channels_min = 1,
 474                 .channels_max = 2,
 475                 .rates = AK4641_RATES,
 476                 .formats = AK4641_FORMATS,
 477         },
 478         .ops = &ak4641_i2s_dai_ops,
 479         .symmetric_rates = 1,
 480 },
 481 {
 482         .name = "ak4641-voice",
 483         .id = 1,
 484         .playback = {
 485                 .stream_name = "Voice Playback",
 486                 .channels_min = 1,
 487                 .channels_max = 1,
 488                 .rates = AK4641_RATES_BT,
 489                 .formats = AK4641_FORMATS,
 490         },
 491         .capture = {
 492                 .stream_name = "Voice Capture",
 493                 .channels_min = 1,
 494                 .channels_max = 1,
 495                 .rates = AK4641_RATES_BT,
 496                 .formats = AK4641_FORMATS,
 497         },
 498         .ops = &ak4641_pcm_dai_ops,
 499         .symmetric_rates = 1,
 500 },
 501 };
 502
 503 static int ak4641_suspend(struct snd_soc_codec *codec, pm_message_t state)
 504 {
 505         ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
 506         return 0;
 507 }
 508
 509 static int ak4641_resume(struct snd_soc_codec *codec)
 510 {
 511         ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 512         return 0;
 513 }
 514
 515 static int ak4641_probe(struct snd_soc_codec *codec)
 516 {
 517         struct ak4641_platform_data *pdata = codec->dev->platform_data;
 518         int ret;
 519
 520
 521         if (pdata) {
 522                 if (gpio_is_valid(pdata->gpio_power)) {
 523                         ret = gpio_request_one(pdata->gpio_power,
 524                                         GPIOF_OUT_INIT_LOW, "ak4641 power");
 525                         if (ret)
 526                                 goto err_out;
 527                 }
 528                 if (gpio_is_valid(pdata->gpio_npdn)) {
 529                         ret = gpio_request_one(pdata->gpio_npdn,
 530                                         GPIOF_OUT_INIT_LOW, "ak4641 npdn");
 531                         if (ret)
 532                                 goto err_gpio;
 533
 534                         udelay(1); /* > 150 ns */
 535                         gpio_set_value(pdata->gpio_npdn, 1);
 536                 }
 537         }
 538
 539         ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
 540         if (ret != 0) {
 541                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 542                 goto err_register;
 543         }
 544
 545         /* power on device */
 546         ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 547
 548         return 0;
 549
 550 err_register:
 551         if (pdata) {
 552                 if (gpio_is_valid(pdata->gpio_power))
 553                         gpio_set_value(pdata->gpio_power, 0);
 554                 if (gpio_is_valid(pdata->gpio_npdn))
 555                         gpio_free(pdata->gpio_npdn);
 556         }
 557 err_gpio:
 558         if (pdata && gpio_is_valid(pdata->gpio_power))
 559                 gpio_free(pdata->gpio_power);
 560 err_out:
 561         return ret;
 562 }
 563
 564 static int ak4641_remove(struct snd_soc_codec *codec)
 565 {
 566         struct ak4641_platform_data *pdata = codec->dev->platform_data;
 567
 568         ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
 569
 570         if (pdata) {
 571                 if (gpio_is_valid(pdata->gpio_power)) {
 572                         gpio_set_value(pdata->gpio_power, 0);
 573                         gpio_free(pdata->gpio_power);
 574                 }
 575                 if (gpio_is_valid(pdata->gpio_npdn))
 576                         gpio_free(pdata->gpio_npdn);
 577         }
 578         return 0;
 579 }
 580
 581
 582 static struct snd_soc_codec_driver soc_codec_dev_ak4641 = {
 583         .probe                  = ak4641_probe,
 584         .remove                 = ak4641_remove,
 585         .suspend                = ak4641_suspend,
 586         .resume                 = ak4641_resume,
 587         .controls               = ak4641_snd_controls,
 588         .num_controls           = ARRAY_SIZE(ak4641_snd_controls),
 589         .dapm_widgets           = ak4641_dapm_widgets,
 590         .num_dapm_widgets       = ARRAY_SIZE(ak4641_dapm_widgets),
 591         .dapm_routes            = ak4641_audio_map,
 592         .num_dapm_routes        = ARRAY_SIZE(ak4641_audio_map),
 593         .set_bias_level         = ak4641_set_bias_level,
 594         .reg_cache_size         = ARRAY_SIZE(ak4641_reg),
 595         .reg_word_size          = sizeof(u8),
 596         .reg_cache_default      = ak4641_reg,
 597         .reg_cache_step         = 1,
 598 };
 599
 600
 601 static int __devinit ak4641_i2c_probe(struct i2c_client *i2c,
 602                                       const struct i2c_device_id *id)
 603 {
 604         struct ak4641_priv *ak4641;
 605         int ret;
 606
 607         ak4641 = kzalloc(sizeof(struct ak4641_priv), GFP_KERNEL);
 608         if (!ak4641)
 609                 return -ENOMEM;
 610
 611         i2c_set_clientdata(i2c, ak4641);
 612
 613         ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_ak4641,
 614                                 ak4641_dai, ARRAY_SIZE(ak4641_dai));
 615         if (ret < 0)
 616                 kfree(ak4641);
 617
 618         return ret;
 619 }
 620
 621 static int __devexit ak4641_i2c_remove(struct i2c_client *i2c)
 622 {
 623         snd_soc_unregister_codec(&i2c->dev);
 624         kfree(i2c_get_clientdata(i2c));
 625         return 0;
 626 }
 627
 628 static const struct i2c_device_id ak4641_i2c_id[] = {
 629         { "ak4641", 0 },
 630         { }
 631 };
 632 MODULE_DEVICE_TABLE(i2c, ak4641_i2c_id);
 633
 634 static struct i2c_driver ak4641_i2c_driver = {
 635         .driver = {
 636                 .name = "ak4641",
 637                 .owner = THIS_MODULE,
 638         },
 639         .probe =    ak4641_i2c_probe,
 640         .remove =   __devexit_p(ak4641_i2c_remove),
 641         .id_table = ak4641_i2c_id,
 642 };
 643
 644 static int __init ak4641_modinit(void)
 645 {
 646         int ret;
 647
 648         ret = i2c_add_driver(&ak4641_i2c_driver);
 649         if (ret != 0)
 650                 pr_err("Failed to register AK4641 I2C driver: %d\n", ret);
 651
 652         return ret;
 653 }
 654 module_init(ak4641_modinit);
 655
 656 static void __exit ak4641_exit(void)
 657 {
 658         i2c_del_driver(&ak4641_i2c_driver);
 659 }
 660 module_exit(ak4641_exit);
 661
 662 MODULE_DESCRIPTION("SoC AK4641 driver");
 663 MODULE_AUTHOR("Harald Welte <laforge@gnufiish.org>");
 664 MODULE_LICENSE("GPL");