sound/soc/codecs/ak4535.c

   1 /*
   2  * ak4535.c  --  AK4535 ALSA Soc Audio driver
   3  *
   4  * Copyright 2005 Openedhand Ltd.
   5  *
   6  * Author: Richard Purdie <richard@openedhand.com>
   7  *
   8  * Based on wm8753.c by Liam Girdwood
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/pm.h>
  20 #include <linux/i2c.h>
  21 #include <linux/platform_device.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/soc-dapm.h>
  27 #include <sound/initval.h>
  28
  29 #include "ak4535.h"
  30
  31 #define AK4535_VERSION "0.3"
  32
  33 struct snd_soc_codec_device soc_codec_dev_ak4535;
  34
  35 /* codec private data */
  36 struct ak4535_priv {
  37         unsigned int sysclk;
  38 };
  39
  40 /*
  41  * ak4535 register cache
  42  */
  43 static const u16 ak4535_reg[AK4535_CACHEREGNUM] = {
  44     0x0000, 0x0080, 0x0000, 0x0003,
  45     0x0002, 0x0000, 0x0011, 0x0001,
  46     0x0000, 0x0040, 0x0036, 0x0010,
  47     0x0000, 0x0000, 0x0057, 0x0000,
  48 };
  49
  50 /*
  51  * read ak4535 register cache
  52  */
  53 static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec,
  54         unsigned int reg)
  55 {
  56         u16 *cache = codec->reg_cache;
  57         if (reg >= AK4535_CACHEREGNUM)
  58                 return -1;
  59         return cache[reg];
  60 }
  61
  62 static inline unsigned int ak4535_read(struct snd_soc_codec *codec,
  63         unsigned int reg)
  64 {
  65         u8 data;
  66         data = reg;
  67
  68         if (codec->hw_write(codec->control_data, &data, 1) != 1)
  69                 return -EIO;
  70
  71         if (codec->hw_read(codec->control_data, &data, 1) != 1)
  72                 return -EIO;
  73
  74         return data;
  75 };
  76
  77 /*
  78  * write ak4535 register cache
  79  */
  80 static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec,
  81         u16 reg, unsigned int value)
  82 {
  83         u16 *cache = codec->reg_cache;
  84         if (reg >= AK4535_CACHEREGNUM)
  85                 return;
  86         cache[reg] = value;
  87 }
  88
  89 /*
  90  * write to the AK4535 register space
  91  */
  92 static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg,
  93         unsigned int value)
  94 {
  95         u8 data[2];
  96
  97         /* data is
  98          *   D15..D8 AK4535 register offset
  99          *   D7...D0 register data
 100          */
 101         data[0] = reg & 0xff;
 102         data[1] = value & 0xff;
 103
 104         ak4535_write_reg_cache(codec, reg, value);
 105         if (codec->hw_write(codec->control_data, data, 2) == 2)
 106                 return 0;
 107         else
 108                 return -EIO;
 109 }
 110
 111 static int ak4535_sync(struct snd_soc_codec *codec)
 112 {
 113         u16 *cache = codec->reg_cache;
 114         int i, r = 0;
 115
 116         for (i = 0; i < AK4535_CACHEREGNUM; i++)
 117                 r |= ak4535_write(codec, i, cache[i]);
 118
 119         return r;
 120 };
 121
 122 static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
 123 static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
 124 static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
 125 static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
 126 static const char *ak4535_mic_select[] = {"Internal", "External"};
 127
 128 static const struct soc_enum ak4535_enum[] = {
 129         SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
 130         SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
 131         SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
 132         SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
 133         SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
 134 };
 135
 136 static const struct snd_kcontrol_new ak4535_snd_controls[] = {
 137         SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
 138         SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
 139         SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
 140         SOC_ENUM("Headphone Output", ak4535_enum[2]),
 141         SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
 142         SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
 143         SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
 144         SOC_ENUM("Mic Select", ak4535_enum[4]),
 145         SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
 146         SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
 147         SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
 148         SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
 149         SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
 150         SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
 151         SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
 152         SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
 153         SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
 154         SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
 155         SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
 156 };
 157
 158 /* add non dapm controls */
 159 static int ak4535_add_controls(struct snd_soc_codec *codec)
 160 {
 161         int err, i;
 162
 163         for (i = 0; i < ARRAY_SIZE(ak4535_snd_controls); i++) {
 164                 err = snd_ctl_add(codec->card,
 165                         snd_soc_cnew(&ak4535_snd_controls[i], codec, NULL));
 166                 if (err < 0)
 167                         return err;
 168         }
 169
 170         return 0;
 171 }
 172
 173 /* Mono 1 Mixer */
 174 static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
 175         SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
 176         SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
 177 };
 178
 179 /* Stereo Mixer */
 180 static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
 181         SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
 182         SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
 183         SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
 184 };
 185
 186 /* Input Mixer */
 187 static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
 188         SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
 189         SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
 190 };
 191
 192 /* Input mux */
 193 static const struct snd_kcontrol_new ak4535_input_mux_control =
 194         SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
 195
 196 /* HP L switch */
 197 static const struct snd_kcontrol_new ak4535_hpl_control =
 198         SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
 199
 200 /* HP R switch */
 201 static const struct snd_kcontrol_new ak4535_hpr_control =
 202         SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
 203
 204 /* mono 2 switch */
 205 static const struct snd_kcontrol_new ak4535_mono2_control =
 206         SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
 207
 208 /* Line out switch */
 209 static const struct snd_kcontrol_new ak4535_line_control =
 210         SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
 211
 212 /* ak4535 dapm widgets */
 213 static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
 214         SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
 215                 &ak4535_stereo_mixer_controls[0],
 216                 ARRAY_SIZE(ak4535_stereo_mixer_controls)),
 217         SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
 218                 &ak4535_mono1_mixer_controls[0],
 219                 ARRAY_SIZE(ak4535_mono1_mixer_controls)),
 220         SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
 221                 &ak4535_input_mixer_controls[0],
 222                 ARRAY_SIZE(ak4535_input_mixer_controls)),
 223         SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
 224                 &ak4535_input_mux_control),
 225         SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
 226         SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
 227                 &ak4535_mono2_control),
 228         /* speaker powersave bit */
 229         SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
 230         SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
 231                 &ak4535_line_control),
 232         SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
 233                 &ak4535_hpl_control),
 234         SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
 235                 &ak4535_hpr_control),
 236         SND_SOC_DAPM_OUTPUT("LOUT"),
 237         SND_SOC_DAPM_OUTPUT("HPL"),
 238         SND_SOC_DAPM_OUTPUT("ROUT"),
 239         SND_SOC_DAPM_OUTPUT("HPR"),
 240         SND_SOC_DAPM_OUTPUT("SPP"),
 241         SND_SOC_DAPM_OUTPUT("SPN"),
 242         SND_SOC_DAPM_OUTPUT("MOUT1"),
 243         SND_SOC_DAPM_OUTPUT("MOUT2"),
 244         SND_SOC_DAPM_OUTPUT("MICOUT"),
 245         SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
 246         SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
 247         SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
 248         SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
 249         SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
 250         SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
 251         SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
 252         SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
 253
 254         SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
 255         SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
 256         SND_SOC_DAPM_INPUT("MICIN"),
 257         SND_SOC_DAPM_INPUT("MICEXT"),
 258         SND_SOC_DAPM_INPUT("AUX"),
 259         SND_SOC_DAPM_INPUT("MIN"),
 260         SND_SOC_DAPM_INPUT("AIN"),
 261 };
 262
 263 static const struct snd_soc_dapm_route audio_map[] = {
 264         /*stereo mixer */
 265         {"Stereo Mixer", "Playback Switch", "DAC"},
 266         {"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
 267         {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
 268
 269         /* mono1 mixer */
 270         {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
 271         {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
 272
 273         /* Mic */
 274         {"Mic", NULL, "AIN"},
 275         {"Input Mux", "Internal", "Mic Int Bias"},
 276         {"Input Mux", "External", "Mic Ext Bias"},
 277         {"Mic Int Bias", NULL, "MICIN"},
 278         {"Mic Ext Bias", NULL, "MICEXT"},
 279         {"MICOUT", NULL, "Input Mux"},
 280
 281         /* line out */
 282         {"LOUT", NULL, "Line Out Enable"},
 283         {"ROUT", NULL, "Line Out Enable"},
 284         {"Line Out Enable", "Switch", "Line Out"},
 285         {"Line Out", NULL, "Stereo Mixer"},
 286
 287         /* mono1 out */
 288         {"MOUT1", NULL, "Mono Out"},
 289         {"Mono Out", NULL, "Mono1 Mixer"},
 290
 291         /* left HP */
 292         {"HPL", NULL, "Left HP Enable"},
 293         {"Left HP Enable", "Switch", "HP L Amp"},
 294         {"HP L Amp", NULL, "Stereo Mixer"},
 295
 296         /* right HP */
 297         {"HPR", NULL, "Right HP Enable"},
 298         {"Right HP Enable", "Switch", "HP R Amp"},
 299         {"HP R Amp", NULL, "Stereo Mixer"},
 300
 301         /* speaker */
 302         {"SPP", NULL, "Speaker Enable"},
 303         {"SPN", NULL, "Speaker Enable"},
 304         {"Speaker Enable", "Switch", "Spk Amp"},
 305         {"Spk Amp", NULL, "MIN"},
 306
 307         /* mono 2 */
 308         {"MOUT2", NULL, "Mono 2 Enable"},
 309         {"Mono 2 Enable", "Switch", "Stereo Mixer"},
 310
 311         /* Aux In */
 312         {"Aux In", NULL, "AUX"},
 313
 314         /* ADC */
 315         {"ADC", NULL, "Input Mixer"},
 316         {"Input Mixer", "Mic Capture Switch", "Mic"},
 317         {"Input Mixer", "Aux Capture Switch", "Aux In"},
 318 };
 319
 320 static int ak4535_add_widgets(struct snd_soc_codec *codec)
 321 {
 322         snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets,
 323                                   ARRAY_SIZE(ak4535_dapm_widgets));
 324
 325         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 326
 327         snd_soc_dapm_new_widgets(codec);
 328         return 0;
 329 }
 330
 331 static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 332         int clk_id, unsigned int freq, int dir)
 333 {
 334         struct snd_soc_codec *codec = codec_dai->codec;
 335         struct ak4535_priv *ak4535 = codec->private_data;
 336
 337         ak4535->sysclk = freq;
 338         return 0;
 339 }
 340
 341 static int ak4535_hw_params(struct snd_pcm_substream *substream,
 342                             struct snd_pcm_hw_params *params,
 343                             struct snd_soc_dai *dai)
 344 {
 345         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 346         struct snd_soc_device *socdev = rtd->socdev;
 347         struct snd_soc_codec *codec = socdev->codec;
 348         struct ak4535_priv *ak4535 = codec->private_data;
 349         u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5);
 350         int rate = params_rate(params), fs = 256;
 351
 352         if (rate)
 353                 fs = ak4535->sysclk / rate;
 354
 355         /* set fs */
 356         switch (fs) {
 357         case 1024:
 358                 mode2 |= (0x2 << 5);
 359                 break;
 360         case 512:
 361                 mode2 |= (0x1 << 5);
 362                 break;
 363         case 256:
 364                 break;
 365         }
 366
 367         /* set rate */
 368         ak4535_write(codec, AK4535_MODE2, mode2);
 369         return 0;
 370 }
 371
 372 static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
 373                 unsigned int fmt)
 374 {
 375         struct snd_soc_codec *codec = codec_dai->codec;
 376         u8 mode1 = 0;
 377
 378         /* interface format */
 379         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 380         case SND_SOC_DAIFMT_I2S:
 381                 mode1 = 0x0002;
 382                 break;
 383         case SND_SOC_DAIFMT_LEFT_J:
 384                 mode1 = 0x0001;
 385                 break;
 386         default:
 387                 return -EINVAL;
 388         }
 389
 390         /* use 32 fs for BCLK to save power */
 391         mode1 |= 0x4;
 392
 393         ak4535_write(codec, AK4535_MODE1, mode1);
 394         return 0;
 395 }
 396
 397 static int ak4535_mute(struct snd_soc_dai *dai, int mute)
 398 {
 399         struct snd_soc_codec *codec = dai->codec;
 400         u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
 401         if (!mute)
 402                 ak4535_write(codec, AK4535_DAC, mute_reg);
 403         else
 404                 ak4535_write(codec, AK4535_DAC, mute_reg | 0x20);
 405         return 0;
 406 }
 407
 408 static int ak4535_set_bias_level(struct snd_soc_codec *codec,
 409         enum snd_soc_bias_level level)
 410 {
 411         u16 i;
 412
 413         switch (level) {
 414         case SND_SOC_BIAS_ON:
 415                 ak4535_mute(codec->dai, 0);
 416                 break;
 417         case SND_SOC_BIAS_PREPARE:
 418                 ak4535_mute(codec->dai, 1);
 419                 break;
 420         case SND_SOC_BIAS_STANDBY:
 421                 i = ak4535_read_reg_cache(codec, AK4535_PM1);
 422                 ak4535_write(codec, AK4535_PM1, i | 0x80);
 423                 i = ak4535_read_reg_cache(codec, AK4535_PM2);
 424                 ak4535_write(codec, AK4535_PM2, i & (~0x80));
 425                 break;
 426         case SND_SOC_BIAS_OFF:
 427                 i = ak4535_read_reg_cache(codec, AK4535_PM1);
 428                 ak4535_write(codec, AK4535_PM1, i & (~0x80));
 429                 break;
 430         }
 431         codec->bias_level = level;
 432         return 0;
 433 }
 434
 435 #define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 436                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
 437                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
 438
 439 struct snd_soc_dai ak4535_dai = {
 440         .name = "AK4535",
 441         .playback = {
 442                 .stream_name = "Playback",
 443                 .channels_min = 1,
 444                 .channels_max = 2,
 445                 .rates = AK4535_RATES,
 446                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 447         .capture = {
 448                 .stream_name = "Capture",
 449                 .channels_min = 1,
 450                 .channels_max = 2,
 451                 .rates = AK4535_RATES,
 452                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 453         .ops = {
 454                 .hw_params = ak4535_hw_params,
 455                 .set_fmt = ak4535_set_dai_fmt,
 456                 .digital_mute = ak4535_mute,
 457                 .set_sysclk = ak4535_set_dai_sysclk,
 458         },
 459 };
 460 EXPORT_SYMBOL_GPL(ak4535_dai);
 461
 462 static int ak4535_suspend(struct platform_device *pdev, pm_message_t state)
 463 {
 464         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 465         struct snd_soc_codec *codec = socdev->codec;
 466
 467         ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
 468         return 0;
 469 }
 470
 471 static int ak4535_resume(struct platform_device *pdev)
 472 {
 473         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 474         struct snd_soc_codec *codec = socdev->codec;
 475         ak4535_sync(codec);
 476         ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 477         ak4535_set_bias_level(codec, codec->suspend_bias_level);
 478         return 0;
 479 }
 480
 481 /*
 482  * initialise the AK4535 driver
 483  * register the mixer and dsp interfaces with the kernel
 484  */
 485 static int ak4535_init(struct snd_soc_device *socdev)
 486 {
 487         struct snd_soc_codec *codec = socdev->codec;
 488         int ret = 0;
 489
 490         codec->name = "AK4535";
 491         codec->owner = THIS_MODULE;
 492         codec->read = ak4535_read_reg_cache;
 493         codec->write = ak4535_write;
 494         codec->set_bias_level = ak4535_set_bias_level;
 495         codec->dai = &ak4535_dai;
 496         codec->num_dai = 1;
 497         codec->reg_cache_size = ARRAY_SIZE(ak4535_reg);
 498         codec->reg_cache = kmemdup(ak4535_reg, sizeof(ak4535_reg), GFP_KERNEL);
 499
 500         if (codec->reg_cache == NULL)
 501                 return -ENOMEM;
 502
 503         /* register pcms */
 504         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 505         if (ret < 0) {
 506                 printk(KERN_ERR "ak4535: failed to create pcms\n");
 507                 goto pcm_err;
 508         }
 509
 510         /* power on device */
 511         ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 512
 513         ak4535_add_controls(codec);
 514         ak4535_add_widgets(codec);
 515         ret = snd_soc_init_card(socdev);
 516         if (ret < 0) {
 517                 printk(KERN_ERR "ak4535: failed to register card\n");
 518                 goto card_err;
 519         }
 520
 521         return ret;
 522
 523 card_err:
 524         snd_soc_free_pcms(socdev);
 525         snd_soc_dapm_free(socdev);
 526 pcm_err:
 527         kfree(codec->reg_cache);
 528
 529         return ret;
 530 }
 531
 532 static struct snd_soc_device *ak4535_socdev;
 533
 534 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 535
 536 static int ak4535_i2c_probe(struct i2c_client *i2c,
 537                             const struct i2c_device_id *id)
 538 {
 539         struct snd_soc_device *socdev = ak4535_socdev;
 540         struct snd_soc_codec *codec = socdev->codec;
 541         int ret;
 542
 543         i2c_set_clientdata(i2c, codec);
 544         codec->control_data = i2c;
 545
 546         ret = ak4535_init(socdev);
 547         if (ret < 0)
 548                 printk(KERN_ERR "failed to initialise AK4535\n");
 549
 550         return ret;
 551 }
 552
 553 static int ak4535_i2c_remove(struct i2c_client *client)
 554 {
 555         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 556         kfree(codec->reg_cache);
 557         return 0;
 558 }
 559
 560 static const struct i2c_device_id ak4535_i2c_id[] = {
 561         { "ak4535", 0 },
 562         { }
 563 };
 564 MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
 565
 566 static struct i2c_driver ak4535_i2c_driver = {
 567         .driver = {
 568                 .name = "AK4535 I2C Codec",
 569                 .owner = THIS_MODULE,
 570         },
 571         .probe =    ak4535_i2c_probe,
 572         .remove =   ak4535_i2c_remove,
 573         .id_table = ak4535_i2c_id,
 574 };
 575
 576 static int ak4535_add_i2c_device(struct platform_device *pdev,
 577                                  const struct ak4535_setup_data *setup)
 578 {
 579         struct i2c_board_info info;
 580         struct i2c_adapter *adapter;
 581         struct i2c_client *client;
 582         int ret;
 583
 584         ret = i2c_add_driver(&ak4535_i2c_driver);
 585         if (ret != 0) {
 586                 dev_err(&pdev->dev, "can't add i2c driver\n");
 587                 return ret;
 588         }
 589
 590         memset(&info, 0, sizeof(struct i2c_board_info));
 591         info.addr = setup->i2c_address;
 592         strlcpy(info.type, "ak4535", I2C_NAME_SIZE);
 593
 594         adapter = i2c_get_adapter(setup->i2c_bus);
 595         if (!adapter) {
 596                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 597                         setup->i2c_bus);
 598                 goto err_driver;
 599         }
 600
 601         client = i2c_new_device(adapter, &info);
 602         i2c_put_adapter(adapter);
 603         if (!client) {
 604                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 605                         (unsigned int)info.addr);
 606                 goto err_driver;
 607         }
 608
 609         return 0;
 610
 611 err_driver:
 612         i2c_del_driver(&ak4535_i2c_driver);
 613         return -ENODEV;
 614 }
 615 #endif
 616
 617 static int ak4535_probe(struct platform_device *pdev)
 618 {
 619         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 620         struct ak4535_setup_data *setup;
 621         struct snd_soc_codec *codec;
 622         struct ak4535_priv *ak4535;
 623         int ret;
 624
 625         printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION);
 626
 627         setup = socdev->codec_data;
 628         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 629         if (codec == NULL)
 630                 return -ENOMEM;
 631
 632         ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL);
 633         if (ak4535 == NULL) {
 634                 kfree(codec);
 635                 return -ENOMEM;
 636         }
 637
 638         codec->private_data = ak4535;
 639         socdev->codec = codec;
 640         mutex_init(&codec->mutex);
 641         INIT_LIST_HEAD(&codec->dapm_widgets);
 642         INIT_LIST_HEAD(&codec->dapm_paths);
 643
 644         ak4535_socdev = socdev;
 645         ret = -ENODEV;
 646
 647 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 648         if (setup->i2c_address) {
 649                 codec->hw_write = (hw_write_t)i2c_master_send;
 650                 codec->hw_read = (hw_read_t)i2c_master_recv;
 651                 ret = ak4535_add_i2c_device(pdev, setup);
 652         }
 653 #endif
 654
 655         if (ret != 0) {
 656                 kfree(codec->private_data);
 657                 kfree(codec);
 658         }
 659         return ret;
 660 }
 661
 662 /* power down chip */
 663 static int ak4535_remove(struct platform_device *pdev)
 664 {
 665         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 666         struct snd_soc_codec *codec = socdev->codec;
 667
 668         if (codec->control_data)
 669                 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
 670
 671         snd_soc_free_pcms(socdev);
 672         snd_soc_dapm_free(socdev);
 673 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 674         i2c_unregister_device(codec->control_data);
 675         i2c_del_driver(&ak4535_i2c_driver);
 676 #endif
 677         kfree(codec->private_data);
 678         kfree(codec);
 679
 680         return 0;
 681 }
 682
 683 struct snd_soc_codec_device soc_codec_dev_ak4535 = {
 684         .probe =        ak4535_probe,
 685         .remove =       ak4535_remove,
 686         .suspend =      ak4535_suspend,
 687         .resume =       ak4535_resume,
 688 };
 689 EXPORT_SYMBOL_GPL(soc_codec_dev_ak4535);
 690
 691 static int __init ak4535_modinit(void)
 692 {
 693         return snd_soc_register_dai(&ak4535_dai);
 694 }
 695 module_init(ak4535_modinit);
 696
 697 static void __exit ak4535_exit(void)
 698 {
 699         snd_soc_unregister_dai(&ak4535_dai);
 700 }
 701 module_exit(ak4535_exit);
 702
 703 MODULE_DESCRIPTION("Soc AK4535 driver");
 704 MODULE_AUTHOR("Richard Purdie");
 705 MODULE_LICENSE("GPL");