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_pcm_runtime *rtd = substream->private_data;
 300         struct snd_soc_codec *codec = rtd->codec;
 301         struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
 302         int rate = params_rate(params), fs = 256;
 303         u8 mode2;
 304
 305         if (rate)
 306                 fs = ak4641->sysclk / rate;
 307         else
 308                 return -EINVAL;
 309
 310         /* set fs */
 311         switch (fs) {
 312         case 1024:
 313                 mode2 = (0x2 << 5);
 314                 break;
 315         case 512:
 316                 mode2 = (0x1 << 5);
 317                 break;
 318         case 256:
 319                 mode2 = (0x0 << 5);
 320                 break;
 321         default:
 322                 dev_err(codec->dev, "Error: unsupported fs=%d\n", fs);
 323                 return -EINVAL;
 324         }
 325
 326         snd_soc_update_bits(codec, AK4641_MODE2, (0x3 << 5), mode2);
 327
 328         /* Update de-emphasis filter for the new rate */
 329         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 330                 ak4641->playback_fs = rate;
 331                 ak4641_set_deemph(codec);
 332         };
 333
 334         return 0;
 335 }
 336
 337 static int ak4641_pcm_set_dai_fmt(struct snd_soc_dai *codec_dai,
 338                                   unsigned int fmt)
 339 {
 340         struct snd_soc_codec *codec = codec_dai->codec;
 341         u8 btif;
 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         return snd_soc_update_bits(codec, AK4641_BTIF, (0x3 << 5), btif);
 362 }
 363
 364 static int ak4641_i2s_set_dai_fmt(struct snd_soc_dai *codec_dai,
 365                 unsigned int fmt)
 366 {
 367         struct snd_soc_codec *codec = codec_dai->codec;
 368         u8 mode1 = 0;
 369
 370         /* interface format */
 371         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 372         case SND_SOC_DAIFMT_I2S:
 373                 mode1 = 0x02;
 374                 break;
 375         case SND_SOC_DAIFMT_LEFT_J:
 376                 mode1 = 0x01;
 377                 break;
 378         default:
 379                 return -EINVAL;
 380         }
 381
 382         return snd_soc_write(codec, AK4641_MODE1, mode1);
 383 }
 384
 385 static int ak4641_mute(struct snd_soc_dai *dai, int mute)
 386 {
 387         struct snd_soc_codec *codec = dai->codec;
 388
 389         return snd_soc_update_bits(codec, AK4641_DAC, 0x20, mute ? 0x20 : 0);
 390 }
 391
 392 static int ak4641_set_bias_level(struct snd_soc_codec *codec,
 393         enum snd_soc_bias_level level)
 394 {
 395         struct ak4641_platform_data *pdata = codec->dev->platform_data;
 396         int ret;
 397
 398         switch (level) {
 399         case SND_SOC_BIAS_ON:
 400                 /* unmute */
 401                 snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0);
 402                 break;
 403         case SND_SOC_BIAS_PREPARE:
 404                 /* mute */
 405                 snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0x20);
 406                 break;
 407         case SND_SOC_BIAS_STANDBY:
 408                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 409                         if (pdata && gpio_is_valid(pdata->gpio_power))
 410                                 gpio_set_value(pdata->gpio_power, 1);
 411                         mdelay(1);
 412                         if (pdata && gpio_is_valid(pdata->gpio_npdn))
 413                                 gpio_set_value(pdata->gpio_npdn, 1);
 414                         mdelay(1);
 415
 416                         ret = snd_soc_cache_sync(codec);
 417                         if (ret) {
 418                                 dev_err(codec->dev,
 419                                         "Failed to sync cache: %d\n", ret);
 420                                 return ret;
 421                         }
 422                 }
 423                 snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0x80);
 424                 snd_soc_update_bits(codec, AK4641_PM2, 0x80, 0);
 425                 break;
 426         case SND_SOC_BIAS_OFF:
 427                 snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0);
 428                 if (pdata && gpio_is_valid(pdata->gpio_npdn))
 429                         gpio_set_value(pdata->gpio_npdn, 0);
 430                 if (pdata && gpio_is_valid(pdata->gpio_power))
 431                         gpio_set_value(pdata->gpio_power, 0);
 432                 codec->cache_sync = 1;
 433                 break;
 434         }
 435         codec->dapm.bias_level = level;
 436         return 0;
 437 }
 438
 439 #define AK4641_RATES    (SNDRV_PCM_RATE_8000_48000)
 440 #define AK4641_RATES_BT (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 441                          SNDRV_PCM_RATE_16000)
 442 #define AK4641_FORMATS  (SNDRV_PCM_FMTBIT_S16_LE)
 443
 444 static const struct snd_soc_dai_ops ak4641_i2s_dai_ops = {
 445         .hw_params    = ak4641_i2s_hw_params,
 446         .set_fmt      = ak4641_i2s_set_dai_fmt,
 447         .digital_mute = ak4641_mute,
 448         .set_sysclk   = ak4641_set_dai_sysclk,
 449 };
 450
 451 static const struct snd_soc_dai_ops ak4641_pcm_dai_ops = {
 452         .hw_params    = NULL, /* rates are controlled by BT chip */
 453         .set_fmt      = ak4641_pcm_set_dai_fmt,
 454         .digital_mute = ak4641_mute,
 455         .set_sysclk   = ak4641_set_dai_sysclk,
 456 };
 457
 458 static struct snd_soc_dai_driver ak4641_dai[] = {
 459 {
 460         .name = "ak4641-hifi",
 461         .id = 1,
 462         .playback = {
 463                 .stream_name = "HiFi Playback",
 464                 .channels_min = 1,
 465                 .channels_max = 2,
 466                 .rates = AK4641_RATES,
 467                 .formats = AK4641_FORMATS,
 468         },
 469         .capture = {
 470                 .stream_name = "HiFi Capture",
 471                 .channels_min = 1,
 472                 .channels_max = 2,
 473                 .rates = AK4641_RATES,
 474                 .formats = AK4641_FORMATS,
 475         },
 476         .ops = &ak4641_i2s_dai_ops,
 477         .symmetric_rates = 1,
 478 },
 479 {
 480         .name = "ak4641-voice",
 481         .id = 1,
 482         .playback = {
 483                 .stream_name = "Voice Playback",
 484                 .channels_min = 1,
 485                 .channels_max = 1,
 486                 .rates = AK4641_RATES_BT,
 487                 .formats = AK4641_FORMATS,
 488         },
 489         .capture = {
 490                 .stream_name = "Voice Capture",
 491                 .channels_min = 1,
 492                 .channels_max = 1,
 493                 .rates = AK4641_RATES_BT,
 494                 .formats = AK4641_FORMATS,
 495         },
 496         .ops = &ak4641_pcm_dai_ops,
 497         .symmetric_rates = 1,
 498 },
 499 };
 500
 501 static int ak4641_suspend(struct snd_soc_codec *codec)
 502 {
 503         ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
 504         return 0;
 505 }
 506
 507 static int ak4641_resume(struct snd_soc_codec *codec)
 508 {
 509         ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 510         return 0;
 511 }
 512
 513 static int ak4641_probe(struct snd_soc_codec *codec)
 514 {
 515         struct ak4641_platform_data *pdata = codec->dev->platform_data;
 516         int ret;
 517
 518
 519         if (pdata) {
 520                 if (gpio_is_valid(pdata->gpio_power)) {
 521                         ret = gpio_request_one(pdata->gpio_power,
 522                                         GPIOF_OUT_INIT_LOW, "ak4641 power");
 523                         if (ret)
 524                                 goto err_out;
 525                 }
 526                 if (gpio_is_valid(pdata->gpio_npdn)) {
 527                         ret = gpio_request_one(pdata->gpio_npdn,
 528                                         GPIOF_OUT_INIT_LOW, "ak4641 npdn");
 529                         if (ret)
 530                                 goto err_gpio;
 531
 532                         udelay(1); /* > 150 ns */
 533                         gpio_set_value(pdata->gpio_npdn, 1);
 534                 }
 535         }
 536
 537         ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
 538         if (ret != 0) {
 539                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 540                 goto err_register;
 541         }
 542
 543         /* power on device */
 544         ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 545
 546         return 0;
 547
 548 err_register:
 549         if (pdata) {
 550                 if (gpio_is_valid(pdata->gpio_power))
 551                         gpio_set_value(pdata->gpio_power, 0);
 552                 if (gpio_is_valid(pdata->gpio_npdn))
 553                         gpio_free(pdata->gpio_npdn);
 554         }
 555 err_gpio:
 556         if (pdata && gpio_is_valid(pdata->gpio_power))
 557                 gpio_free(pdata->gpio_power);
 558 err_out:
 559         return ret;
 560 }
 561
 562 static int ak4641_remove(struct snd_soc_codec *codec)
 563 {
 564         struct ak4641_platform_data *pdata = codec->dev->platform_data;
 565
 566         ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
 567
 568         if (pdata) {
 569                 if (gpio_is_valid(pdata->gpio_power)) {
 570                         gpio_set_value(pdata->gpio_power, 0);
 571                         gpio_free(pdata->gpio_power);
 572                 }
 573                 if (gpio_is_valid(pdata->gpio_npdn))
 574                         gpio_free(pdata->gpio_npdn);
 575         }
 576         return 0;
 577 }
 578
 579
 580 static struct snd_soc_codec_driver soc_codec_dev_ak4641 = {
 581         .probe                  = ak4641_probe,
 582         .remove                 = ak4641_remove,
 583         .suspend                = ak4641_suspend,
 584         .resume                 = ak4641_resume,
 585         .controls               = ak4641_snd_controls,
 586         .num_controls           = ARRAY_SIZE(ak4641_snd_controls),
 587         .dapm_widgets           = ak4641_dapm_widgets,
 588         .num_dapm_widgets       = ARRAY_SIZE(ak4641_dapm_widgets),
 589         .dapm_routes            = ak4641_audio_map,
 590         .num_dapm_routes        = ARRAY_SIZE(ak4641_audio_map),
 591         .set_bias_level         = ak4641_set_bias_level,
 592         .reg_cache_size         = ARRAY_SIZE(ak4641_reg),
 593         .reg_word_size          = sizeof(u8),
 594         .reg_cache_default      = ak4641_reg,
 595         .reg_cache_step         = 1,
 596 };
 597
 598
 599 static int __devinit ak4641_i2c_probe(struct i2c_client *i2c,
 600                                       const struct i2c_device_id *id)
 601 {
 602         struct ak4641_priv *ak4641;
 603         int ret;
 604
 605         ak4641 = kzalloc(sizeof(struct ak4641_priv), GFP_KERNEL);
 606         if (!ak4641)
 607                 return -ENOMEM;
 608
 609         i2c_set_clientdata(i2c, ak4641);
 610
 611         ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_ak4641,
 612                                 ak4641_dai, ARRAY_SIZE(ak4641_dai));
 613         if (ret < 0)
 614                 kfree(ak4641);
 615
 616         return ret;
 617 }
 618
 619 static int __devexit ak4641_i2c_remove(struct i2c_client *i2c)
 620 {
 621         snd_soc_unregister_codec(&i2c->dev);
 622         kfree(i2c_get_clientdata(i2c));
 623         return 0;
 624 }
 625
 626 static const struct i2c_device_id ak4641_i2c_id[] = {
 627         { "ak4641", 0 },
 628         { }
 629 };
 630 MODULE_DEVICE_TABLE(i2c, ak4641_i2c_id);
 631
 632 static struct i2c_driver ak4641_i2c_driver = {
 633         .driver = {
 634                 .name = "ak4641",
 635                 .owner = THIS_MODULE,
 636         },
 637         .probe =    ak4641_i2c_probe,
 638         .remove =   __devexit_p(ak4641_i2c_remove),
 639         .id_table = ak4641_i2c_id,
 640 };
 641
 642 static int __init ak4641_modinit(void)
 643 {
 644         int ret;
 645
 646         ret = i2c_add_driver(&ak4641_i2c_driver);
 647         if (ret != 0)
 648                 pr_err("Failed to register AK4641 I2C driver: %d\n", ret);
 649
 650         return ret;
 651 }
 652 module_init(ak4641_modinit);
 653
 654 static void __exit ak4641_exit(void)
 655 {
 656         i2c_del_driver(&ak4641_i2c_driver);
 657 }
 658 module_exit(ak4641_exit);
 659
 660 MODULE_DESCRIPTION("SoC AK4641 driver");
 661 MODULE_AUTHOR("Harald Welte <laforge@gnufiish.org>");
 662 MODULE_LICENSE("GPL");