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