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/slab.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/soc.h>
  25 #include <sound/initval.h>
  26 #include <sound/tlv.h>
  27 #include <sound/ak4641.h>
  28
  29 #include "ak4641.h"
  30
  31 /* codec private data */
  32 struct ak4641_priv {
  33         unsigned int sysclk;
  34         int deemph;
  35         int playback_fs;
  36 };
  37
  38 /*
  39  * ak4641 register cache
  40  */
  41 static const u8 ak4641_reg[AK4641_CACHEREGNUM] = {
  42         0x00, 0x80, 0x00, 0x80,
  43         0x02, 0x00, 0x11, 0x05,
  44         0x00, 0x00, 0x36, 0x10,
  45         0x00, 0x00, 0x57, 0x00,
  46         0x88, 0x88, 0x08, 0x08
  47 };
  48
  49 static const int deemph_settings[] = {44100, 0, 48000, 32000};
  50
  51 static int ak4641_set_deemph(struct snd_soc_codec *codec)
  52 {
  53         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
  54         int i, best = 0;
  55
  56         for (i = 0 ; i < ARRAY_SIZE(deemph_settings); i++) {
  57                 /* if deemphasis is on, select the nearest available rate */
  58                 if (ak4641->deemph && deemph_settings[i] != 0 &&
  59                     abs(deemph_settings[i] - ak4641->playback_fs) <
  60                     abs(deemph_settings[best] - ak4641->playback_fs))
  61                         best = i;
  62
  63                 if (!ak4641->deemph && deemph_settings[i] == 0)
  64                         best = i;
  65         }
  66
  67         dev_dbg(codec->dev, "Set deemphasis %d\n", best);
  68
  69         return snd_soc_update_bits(codec, AK4641_DAC, 0x3, best);
  70 }
  71
  72 static int ak4641_put_deemph(struct snd_kcontrol *kcontrol,
  73                                 struct snd_ctl_elem_value *ucontrol)
  74 {
  75         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  76         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
  77         int deemph = ucontrol->value.enumerated.item[0];
  78
  79         if (deemph > 1)
  80                 return -EINVAL;
  81
  82         ak4641->deemph = deemph;
  83
  84         return ak4641_set_deemph(codec);
  85 }
  86
  87 static int ak4641_get_deemph(struct snd_kcontrol *kcontrol,
  88                                 struct snd_ctl_elem_value *ucontrol)
  89 {
  90         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  91         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
  92
  93         ucontrol->value.enumerated.item[0] = ak4641->deemph;
  94         return 0;
  95 };
  96
  97 static const char *ak4641_mono_out[] = {"(L + R)/2", "Hi-Z"};
  98 static const char *ak4641_hp_out[] = {"Stereo", "Mono"};
  99 static const char *ak4641_mic_select[] = {"Internal", "External"};
 100 static const char *ak4641_mic_or_dac[] = {"Microphone", "Voice DAC"};
 101
 102
 103 static const DECLARE_TLV_DB_SCALE(mono_gain_tlv, -1700, 2300, 0);
 104 static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 2000, 0);
 105 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1050, 150, 0);
 106 static const DECLARE_TLV_DB_SCALE(master_tlv, -12750, 50, 0);
 107 static const DECLARE_TLV_DB_SCALE(mic_stereo_sidetone_tlv, -2700, 300, 0);
 108 static const DECLARE_TLV_DB_SCALE(mic_mono_sidetone_tlv, -400, 400, 0);
 109 static const DECLARE_TLV_DB_SCALE(capture_tlv, -800, 50, 0);
 110 static const DECLARE_TLV_DB_SCALE(alc_tlv, -800, 50, 0);
 111 static const DECLARE_TLV_DB_SCALE(aux_in_tlv, -2100, 300, 0);
 112
 113
 114 static const struct soc_enum ak4641_mono_out_enum =
 115         SOC_ENUM_SINGLE(AK4641_SIG1, 6, 2, ak4641_mono_out);
 116 static const struct soc_enum ak4641_hp_out_enum =
 117         SOC_ENUM_SINGLE(AK4641_MODE2, 2, 2, ak4641_hp_out);
 118 static const struct soc_enum ak4641_mic_select_enum =
 119         SOC_ENUM_SINGLE(AK4641_MIC, 1, 2, ak4641_mic_select);
 120 static const struct soc_enum ak4641_mic_or_dac_enum =
 121         SOC_ENUM_SINGLE(AK4641_BTIF, 4, 2, ak4641_mic_or_dac);
 122
 123 static const struct snd_kcontrol_new ak4641_snd_controls[] = {
 124         SOC_ENUM("Mono 1 Output", ak4641_mono_out_enum),
 125         SOC_SINGLE_TLV("Mono 1 Gain Volume", AK4641_SIG1, 7, 1, 1,
 126                                                         mono_gain_tlv),
 127         SOC_ENUM("Headphone Output", ak4641_hp_out_enum),
 128         SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 129                                         ak4641_get_deemph, ak4641_put_deemph),
 130
 131         SOC_SINGLE_TLV("Mic Boost Volume", AK4641_MIC, 0, 1, 0, mic_boost_tlv),
 132
 133         SOC_SINGLE("ALC Operation Time", AK4641_TIMER, 0, 3, 0),
 134         SOC_SINGLE("ALC Recovery Time", AK4641_TIMER, 2, 3, 0),
 135         SOC_SINGLE("ALC ZC Time", AK4641_TIMER, 4, 3, 0),
 136
 137         SOC_SINGLE("ALC 1 Switch", AK4641_ALC1, 5, 1, 0),
 138
 139         SOC_SINGLE_TLV("ALC Volume", AK4641_ALC2, 0, 71, 0, alc_tlv),
 140         SOC_SINGLE("Left Out Enable Switch", AK4641_SIG2, 1, 1, 0),
 141         SOC_SINGLE("Right Out Enable Switch", AK4641_SIG2, 0, 1, 0),
 142
 143         SOC_SINGLE_TLV("Capture Volume", AK4641_PGA, 0, 71, 0, capture_tlv),
 144
 145         SOC_DOUBLE_R_TLV("Master Playback Volume", AK4641_LATT,
 146                                 AK4641_RATT, 0, 255, 1, master_tlv),
 147
 148         SOC_SINGLE_TLV("AUX In Volume", AK4641_VOL, 0, 15, 0, aux_in_tlv),
 149
 150         SOC_SINGLE("Equalizer Switch", AK4641_DAC, 2, 1, 0),
 151         SOC_SINGLE_TLV("EQ1 100 Hz Volume", AK4641_EQLO, 0, 15, 1, eq_tlv),
 152         SOC_SINGLE_TLV("EQ2 250 Hz Volume", AK4641_EQLO, 4, 15, 1, eq_tlv),
 153         SOC_SINGLE_TLV("EQ3 1 kHz Volume", AK4641_EQMID, 0, 15, 1, eq_tlv),
 154         SOC_SINGLE_TLV("EQ4 3.5 kHz Volume", AK4641_EQMID, 4, 15, 1, eq_tlv),
 155         SOC_SINGLE_TLV("EQ5 10 kHz Volume", AK4641_EQHI, 0, 15, 1, eq_tlv),
 156 };
 157
 158 /* Mono 1 Mixer */
 159 static const struct snd_kcontrol_new ak4641_mono1_mixer_controls[] = {
 160         SOC_DAPM_SINGLE_TLV("Mic Mono Sidetone Volume", AK4641_VOL, 7, 1, 0,
 161                                                 mic_mono_sidetone_tlv),
 162         SOC_DAPM_SINGLE("Mic Mono Sidetone Switch", AK4641_SIG1, 4, 1, 0),
 163         SOC_DAPM_SINGLE("Mono Playback Switch", AK4641_SIG1, 5, 1, 0),
 164 };
 165
 166 /* Stereo Mixer */
 167 static const struct snd_kcontrol_new ak4641_stereo_mixer_controls[] = {
 168         SOC_DAPM_SINGLE_TLV("Mic Sidetone Volume", AK4641_VOL, 4, 7, 0,
 169                                                 mic_stereo_sidetone_tlv),
 170         SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4641_SIG2, 4, 1, 0),
 171         SOC_DAPM_SINGLE("Playback Switch", AK4641_SIG2, 7, 1, 0),
 172         SOC_DAPM_SINGLE("Aux Bypass Switch", AK4641_SIG2, 5, 1, 0),
 173 };
 174
 175 /* Input Mixer */
 176 static const struct snd_kcontrol_new ak4641_input_mixer_controls[] = {
 177         SOC_DAPM_SINGLE("Mic Capture Switch", AK4641_MIC, 2, 1, 0),
 178         SOC_DAPM_SINGLE("Aux Capture Switch", AK4641_MIC, 5, 1, 0),
 179 };
 180
 181 /* Mic mux */
 182 static const struct snd_kcontrol_new ak4641_mic_mux_control =
 183         SOC_DAPM_ENUM("Mic Select", ak4641_mic_select_enum);
 184
 185 /* Input mux */
 186 static const struct snd_kcontrol_new ak4641_input_mux_control =
 187         SOC_DAPM_ENUM("Input Select", ak4641_mic_or_dac_enum);
 188
 189 /* mono 2 switch */
 190 static const struct snd_kcontrol_new ak4641_mono2_control =
 191         SOC_DAPM_SINGLE("Switch", AK4641_SIG1, 0, 1, 0);
 192
 193 /* ak4641 dapm widgets */
 194 static const struct snd_soc_dapm_widget ak4641_dapm_widgets[] = {
 195         SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
 196                 &ak4641_stereo_mixer_controls[0],
 197                 ARRAY_SIZE(ak4641_stereo_mixer_controls)),
 198         SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
 199                 &ak4641_mono1_mixer_controls[0],
 200                 ARRAY_SIZE(ak4641_mono1_mixer_controls)),
 201         SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
 202                 &ak4641_input_mixer_controls[0],
 203                 ARRAY_SIZE(ak4641_input_mixer_controls)),
 204         SND_SOC_DAPM_MUX("Mic Mux", SND_SOC_NOPM, 0, 0,
 205                 &ak4641_mic_mux_control),
 206         SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
 207                 &ak4641_input_mux_control),
 208         SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
 209                 &ak4641_mono2_control),
 210
 211         SND_SOC_DAPM_OUTPUT("LOUT"),
 212         SND_SOC_DAPM_OUTPUT("ROUT"),
 213         SND_SOC_DAPM_OUTPUT("MOUT1"),
 214         SND_SOC_DAPM_OUTPUT("MOUT2"),
 215         SND_SOC_DAPM_OUTPUT("MICOUT"),
 216
 217         SND_SOC_DAPM_ADC("ADC", "HiFi Capture", AK4641_PM1, 0, 0),
 218         SND_SOC_DAPM_PGA("Mic", AK4641_PM1, 1, 0, NULL, 0),
 219         SND_SOC_DAPM_PGA("AUX In", AK4641_PM1, 2, 0, NULL, 0),
 220         SND_SOC_DAPM_PGA("Mono Out", AK4641_PM1, 3, 0, NULL, 0),
 221         SND_SOC_DAPM_PGA("Line Out", AK4641_PM1, 4, 0, NULL, 0),
 222
 223         SND_SOC_DAPM_DAC("DAC", "HiFi Playback", AK4641_PM2, 0, 0),
 224         SND_SOC_DAPM_PGA("Mono Out 2", AK4641_PM2, 3, 0, NULL, 0),
 225
 226         SND_SOC_DAPM_ADC("Voice ADC", "Voice Capture", AK4641_BTIF, 0, 0),
 227         SND_SOC_DAPM_DAC("Voice DAC", "Voice Playback", AK4641_BTIF, 1, 0),
 228
 229         SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4641_MIC, 3, 0),
 230         SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4641_MIC, 4, 0),
 231
 232         SND_SOC_DAPM_INPUT("MICIN"),
 233         SND_SOC_DAPM_INPUT("MICEXT"),
 234         SND_SOC_DAPM_INPUT("AUX"),
 235         SND_SOC_DAPM_INPUT("AIN"),
 236 };
 237
 238 static const struct snd_soc_dapm_route ak4641_audio_map[] = {
 239         /* Stereo Mixer */
 240         {"Stereo Mixer", "Playback Switch", "DAC"},
 241         {"Stereo Mixer", "Mic Sidetone Switch", "Input Mux"},
 242         {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
 243
 244         /* Mono 1 Mixer */
 245         {"Mono1 Mixer", "Mic Mono Sidetone Switch", "Input Mux"},
 246         {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
 247
 248         /* Mic */
 249         {"Mic", NULL, "AIN"},
 250         {"Mic Mux", "Internal", "Mic Int Bias"},
 251         {"Mic Mux", "External", "Mic Ext Bias"},
 252         {"Mic Int Bias", NULL, "MICIN"},
 253         {"Mic Ext Bias", NULL, "MICEXT"},
 254         {"MICOUT", NULL, "Mic Mux"},
 255
 256         /* Input Mux */
 257         {"Input Mux", "Microphone", "Mic"},
 258         {"Input Mux", "Voice DAC", "Voice DAC"},
 259
 260         /* Line Out */
 261         {"LOUT", NULL, "Line Out"},
 262         {"ROUT", NULL, "Line Out"},
 263         {"Line Out", NULL, "Stereo Mixer"},
 264
 265         /* Mono 1 Out */
 266         {"MOUT1", NULL, "Mono Out"},
 267         {"Mono Out", NULL, "Mono1 Mixer"},
 268
 269         /* Mono 2 Out */
 270         {"MOUT2", NULL, "Mono 2 Enable"},
 271         {"Mono 2 Enable", "Switch", "Mono Out 2"},
 272         {"Mono Out 2", NULL, "Stereo Mixer"},
 273
 274         {"Voice ADC", NULL, "Mono 2 Enable"},
 275
 276         /* Aux In */
 277         {"AUX In", NULL, "AUX"},
 278
 279         /* ADC */
 280         {"ADC", NULL, "Input Mixer"},
 281         {"Input Mixer", "Mic Capture Switch", "Mic"},
 282         {"Input Mixer", "Aux Capture Switch", "AUX In"},
 283 };
 284
 285 static int ak4641_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 286         int clk_id, unsigned int freq, int dir)
 287 {
 288         struct snd_soc_codec *codec = codec_dai->codec;
 289         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
 290
 291         ak4641->sysclk = freq;
 292         return 0;
 293 }
 294
 295 static int ak4641_i2s_hw_params(struct snd_pcm_substream *substream,
 296                                  struct snd_pcm_hw_params *params,
 297                                  struct snd_soc_dai *dai)
 298 {
 299         struct snd_soc_codec *codec = dai->codec;
 300         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
 301         int rate = params_rate(params), fs = 256;
 302         u8 mode2;
 303
 304         if (rate)
 305                 fs = ak4641->sysclk / rate;
 306         else
 307                 return -EINVAL;
 308
 309         /* set fs */
 310         switch (fs) {
 311         case 1024:
 312                 mode2 = (0x2 << 5);
 313                 break;
 314         case 512:
 315                 mode2 = (0x1 << 5);
 316                 break;
 317         case 256:
 318                 mode2 = (0x0 << 5);
 319                 break;
 320         default:
 321                 dev_err(codec->dev, "Error: unsupported fs=%d\n", fs);
 322                 return -EINVAL;
 323         }
 324
 325         snd_soc_update_bits(codec, AK4641_MODE2, (0x3 << 5), mode2);
 326
 327         /* Update de-emphasis filter for the new rate */
 328         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 329                 ak4641->playback_fs = rate;
 330                 ak4641_set_deemph(codec);
 331         };
 332
 333         return 0;
 334 }
 335
 336 static int ak4641_pcm_set_dai_fmt(struct snd_soc_dai *codec_dai,
 337                                   unsigned int fmt)
 338 {
 339         struct snd_soc_codec *codec = codec_dai->codec;
 340         u8 btif;
 341         int ret;
 342
 343         /* interface format */
 344         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 345         case SND_SOC_DAIFMT_I2S:
 346                 btif = (0x3 << 5);
 347                 break;
 348         case SND_SOC_DAIFMT_LEFT_J:
 349                 btif = (0x2 << 5);
 350                 break;
 351         case SND_SOC_DAIFMT_DSP_A:      /* MSB after FRM */
 352                 btif = (0x0 << 5);
 353                 break;
 354         case SND_SOC_DAIFMT_DSP_B:      /* MSB during FRM */
 355                 btif = (0x1 << 5);
 356                 break;
 357         default:
 358                 return -EINVAL;
 359         }
 360
 361         ret = snd_soc_update_bits(codec, AK4641_BTIF, (0x3 << 5), btif);
 362         if (ret < 0)
 363                 return ret;
 364
 365         return 0;
 366 }
 367
 368 static int ak4641_i2s_set_dai_fmt(struct snd_soc_dai *codec_dai,
 369                 unsigned int fmt)
 370 {
 371         struct snd_soc_codec *codec = codec_dai->codec;
 372         u8 mode1 = 0;
 373
 374         /* interface format */
 375         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 376         case SND_SOC_DAIFMT_I2S:
 377                 mode1 = 0x02;
 378                 break;
 379         case SND_SOC_DAIFMT_LEFT_J:
 380                 mode1 = 0x01;
 381                 break;
 382         default:
 383                 return -EINVAL;
 384         }
 385
 386         return snd_soc_write(codec, AK4641_MODE1, mode1);
 387 }
 388
 389 static int ak4641_mute(struct snd_soc_dai *dai, int mute)
 390 {
 391         struct snd_soc_codec *codec = dai->codec;
 392
 393         return snd_soc_update_bits(codec, AK4641_DAC, 0x20, mute ? 0x20 : 0);
 394 }
 395
 396 static int ak4641_set_bias_level(struct snd_soc_codec *codec,
 397         enum snd_soc_bias_level level)
 398 {
 399         struct ak4641_platform_data *pdata = codec->dev->platform_data;
 400         int ret;
 401
 402         switch (level) {
 403         case SND_SOC_BIAS_ON:
 404                 /* unmute */
 405                 snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0);
 406                 break;
 407         case SND_SOC_BIAS_PREPARE:
 408                 /* mute */
 409                 snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0x20);
 410                 break;
 411         case SND_SOC_BIAS_STANDBY:
 412                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 413                         if (pdata && gpio_is_valid(pdata->gpio_power))
 414                                 gpio_set_value(pdata->gpio_power, 1);
 415                         mdelay(1);
 416                         if (pdata && gpio_is_valid(pdata->gpio_npdn))
 417                                 gpio_set_value(pdata->gpio_npdn, 1);
 418                         mdelay(1);
 419
 420                         ret = snd_soc_cache_sync(codec);
 421                         if (ret) {
 422                                 dev_err(codec->dev,
 423                                         "Failed to sync cache: %d\n", ret);
 424                                 return ret;
 425                         }
 426                 }
 427                 snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0x80);
 428                 snd_soc_update_bits(codec, AK4641_PM2, 0x80, 0);
 429                 break;
 430         case SND_SOC_BIAS_OFF:
 431                 snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0);
 432                 if (pdata && gpio_is_valid(pdata->gpio_npdn))
 433                         gpio_set_value(pdata->gpio_npdn, 0);
 434                 if (pdata && gpio_is_valid(pdata->gpio_power))
 435                         gpio_set_value(pdata->gpio_power, 0);
 436                 codec->cache_sync = 1;
 437                 break;
 438         }
 439         codec->dapm.bias_level = level;
 440         return 0;
 441 }
 442
 443 #define AK4641_RATES    (SNDRV_PCM_RATE_8000_48000)
 444 #define AK4641_RATES_BT (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 445                          SNDRV_PCM_RATE_16000)
 446 #define AK4641_FORMATS  (SNDRV_PCM_FMTBIT_S16_LE)
 447
 448 static const struct snd_soc_dai_ops ak4641_i2s_dai_ops = {
 449         .hw_params    = ak4641_i2s_hw_params,
 450         .set_fmt      = ak4641_i2s_set_dai_fmt,
 451         .digital_mute = ak4641_mute,
 452         .set_sysclk   = ak4641_set_dai_sysclk,
 453 };
 454
 455 static const struct snd_soc_dai_ops ak4641_pcm_dai_ops = {
 456         .hw_params    = NULL, /* rates are controlled by BT chip */
 457         .set_fmt      = ak4641_pcm_set_dai_fmt,
 458         .digital_mute = ak4641_mute,
 459         .set_sysclk   = ak4641_set_dai_sysclk,
 460 };
 461
 462 static struct snd_soc_dai_driver ak4641_dai[] = {
 463 {
 464         .name = "ak4641-hifi",
 465         .id = 1,
 466         .playback = {
 467                 .stream_name = "HiFi Playback",
 468                 .channels_min = 1,
 469                 .channels_max = 2,
 470                 .rates = AK4641_RATES,
 471                 .formats = AK4641_FORMATS,
 472         },
 473         .capture = {
 474                 .stream_name = "HiFi Capture",
 475                 .channels_min = 1,
 476                 .channels_max = 2,
 477                 .rates = AK4641_RATES,
 478                 .formats = AK4641_FORMATS,
 479         },
 480         .ops = &ak4641_i2s_dai_ops,
 481         .symmetric_rates = 1,
 482 },
 483 {
 484         .name = "ak4641-voice",
 485         .id = 1,
 486         .playback = {
 487                 .stream_name = "Voice Playback",
 488                 .channels_min = 1,
 489                 .channels_max = 1,
 490                 .rates = AK4641_RATES_BT,
 491                 .formats = AK4641_FORMATS,
 492         },
 493         .capture = {
 494                 .stream_name = "Voice Capture",
 495                 .channels_min = 1,
 496                 .channels_max = 1,
 497                 .rates = AK4641_RATES_BT,
 498                 .formats = AK4641_FORMATS,
 499         },
 500         .ops = &ak4641_pcm_dai_ops,
 501         .symmetric_rates = 1,
 502 },
 503 };
 504
 505 static int ak4641_suspend(struct snd_soc_codec *codec)
 506 {
 507         ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
 508         return 0;
 509 }
 510
 511 static int ak4641_resume(struct snd_soc_codec *codec)
 512 {
 513         ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 514         return 0;
 515 }
 516
 517 static int ak4641_probe(struct snd_soc_codec *codec)
 518 {
 519         int ret;
 520
 521         ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
 522         if (ret != 0) {
 523                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 524                 return ret;
 525         }
 526
 527         /* power on device */
 528         ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 529
 530         return 0;
 531 }
 532
 533 static int ak4641_remove(struct snd_soc_codec *codec)
 534 {
 535         ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
 536
 537         return 0;
 538 }
 539
 540
 541 static struct snd_soc_codec_driver soc_codec_dev_ak4641 = {
 542         .probe                  = ak4641_probe,
 543         .remove                 = ak4641_remove,
 544         .suspend                = ak4641_suspend,
 545         .resume                 = ak4641_resume,
 546         .controls               = ak4641_snd_controls,
 547         .num_controls           = ARRAY_SIZE(ak4641_snd_controls),
 548         .dapm_widgets           = ak4641_dapm_widgets,
 549         .num_dapm_widgets       = ARRAY_SIZE(ak4641_dapm_widgets),
 550         .dapm_routes            = ak4641_audio_map,
 551         .num_dapm_routes        = ARRAY_SIZE(ak4641_audio_map),
 552         .set_bias_level         = ak4641_set_bias_level,
 553         .reg_cache_size         = ARRAY_SIZE(ak4641_reg),
 554         .reg_word_size          = sizeof(u8),
 555         .reg_cache_default      = ak4641_reg,
 556         .reg_cache_step         = 1,
 557 };
 558
 559
 560 static int ak4641_i2c_probe(struct i2c_client *i2c,
 561                             const struct i2c_device_id *id)
 562 {
 563         struct ak4641_platform_data *pdata = i2c->dev.platform_data;
 564         struct ak4641_priv *ak4641;
 565         int ret;
 566
 567         ak4641 = devm_kzalloc(&i2c->dev, sizeof(struct ak4641_priv),
 568                               GFP_KERNEL);
 569         if (!ak4641)
 570                 return -ENOMEM;
 571
 572         if (pdata) {
 573                 if (gpio_is_valid(pdata->gpio_power)) {
 574                         ret = gpio_request_one(pdata->gpio_power,
 575                                         GPIOF_OUT_INIT_LOW, "ak4641 power");
 576                         if (ret)
 577                                 goto err_out;
 578                 }
 579                 if (gpio_is_valid(pdata->gpio_npdn)) {
 580                         ret = gpio_request_one(pdata->gpio_npdn,
 581                                         GPIOF_OUT_INIT_LOW, "ak4641 npdn");
 582                         if (ret)
 583                                 goto err_gpio;
 584
 585                         udelay(1); /* > 150 ns */
 586                         gpio_set_value(pdata->gpio_npdn, 1);
 587                 }
 588         }
 589
 590         i2c_set_clientdata(i2c, ak4641);
 591
 592         ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_ak4641,
 593                                 ak4641_dai, ARRAY_SIZE(ak4641_dai));
 594         if (ret != 0)
 595                 goto err_gpio2;
 596
 597         return 0;
 598
 599 err_gpio2:
 600         if (pdata) {
 601                 if (gpio_is_valid(pdata->gpio_power))
 602                         gpio_set_value(pdata->gpio_power, 0);
 603                 if (gpio_is_valid(pdata->gpio_npdn))
 604                         gpio_free(pdata->gpio_npdn);
 605         }
 606 err_gpio:
 607         if (pdata && gpio_is_valid(pdata->gpio_power))
 608                 gpio_free(pdata->gpio_power);
 609 err_out:
 610         return ret;
 611 }
 612
 613 static int ak4641_i2c_remove(struct i2c_client *i2c)
 614 {
 615         struct ak4641_platform_data *pdata = i2c->dev.platform_data;
 616
 617         snd_soc_unregister_codec(&i2c->dev);
 618
 619         if (pdata) {
 620                 if (gpio_is_valid(pdata->gpio_power)) {
 621                         gpio_set_value(pdata->gpio_power, 0);
 622                         gpio_free(pdata->gpio_power);
 623                 }
 624                 if (gpio_is_valid(pdata->gpio_npdn))
 625                         gpio_free(pdata->gpio_npdn);
 626         }
 627
 628         return 0;
 629 }
 630
 631 static const struct i2c_device_id ak4641_i2c_id[] = {
 632         { "ak4641", 0 },
 633         { }
 634 };
 635 MODULE_DEVICE_TABLE(i2c, ak4641_i2c_id);
 636
 637 static struct i2c_driver ak4641_i2c_driver = {
 638         .driver = {
 639                 .name = "ak4641",
 640                 .owner = THIS_MODULE,
 641         },
 642         .probe =    ak4641_i2c_probe,
 643         .remove =   ak4641_i2c_remove,
 644         .id_table = ak4641_i2c_id,
 645 };
 646
 647 module_i2c_driver(ak4641_i2c_driver);
 648
 649 MODULE_DESCRIPTION("SoC AK4641 driver");
 650 MODULE_AUTHOR("Harald Welte <laforge@gnufiish.org>");
 651 MODULE_LICENSE("GPL");