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 AUDIO_NAME "ak4535"
  32 #define AK4535_VERSION "0.3"
  33
  34 struct snd_soc_codec_device soc_codec_dev_ak4535;
  35
  36 /* codec private data */
  37 struct ak4535_priv {
  38         unsigned int sysclk;
  39 };
  40
  41 /*
  42  * ak4535 register cache
  43  */
  44 static const u16 ak4535_reg[AK4535_CACHEREGNUM] = {
  45     0x0000, 0x0080, 0x0000, 0x0003,
  46     0x0002, 0x0000, 0x0011, 0x0001,
  47     0x0000, 0x0040, 0x0036, 0x0010,
  48     0x0000, 0x0000, 0x0057, 0x0000,
  49 };
  50
  51 /*
  52  * read ak4535 register cache
  53  */
  54 static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec,
  55         unsigned int reg)
  56 {
  57         u16 *cache = codec->reg_cache;
  58         if (reg >= AK4535_CACHEREGNUM)
  59                 return -1;
  60         return cache[reg];
  61 }
  62
  63 static inline unsigned int ak4535_read(struct snd_soc_codec *codec,
  64         unsigned int reg)
  65 {
  66         u8 data;
  67         data = reg;
  68
  69         if (codec->hw_write(codec->control_data, &data, 1) != 1)
  70                 return -EIO;
  71
  72         if (codec->hw_read(codec->control_data, &data, 1) != 1)
  73                 return -EIO;
  74
  75         return data;
  76 };
  77
  78 /*
  79  * write ak4535 register cache
  80  */
  81 static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec,
  82         u16 reg, unsigned int value)
  83 {
  84         u16 *cache = codec->reg_cache;
  85         if (reg >= AK4535_CACHEREGNUM)
  86                 return;
  87         cache[reg] = value;
  88 }
  89
  90 /*
  91  * write to the AK4535 register space
  92  */
  93 static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg,
  94         unsigned int value)
  95 {
  96         u8 data[2];
  97
  98         /* data is
  99          *   D15..D8 AK4535 register offset
 100          *   D7...D0 register data
 101          */
 102         data[0] = reg & 0xff;
 103         data[1] = value & 0xff;
 104
 105         ak4535_write_reg_cache(codec, reg, value);
 106         if (codec->hw_write(codec->control_data, data, 2) == 2)
 107                 return 0;
 108         else
 109                 return -EIO;
 110 }
 111
 112 static int ak4535_sync(struct snd_soc_codec *codec)
 113 {
 114         u16 *cache = codec->reg_cache;
 115         int i, r = 0;
 116
 117         for (i = 0; i < AK4535_CACHEREGNUM; i++)
 118                 r |= ak4535_write(codec, i, cache[i]);
 119
 120         return r;
 121 };
 122
 123 static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
 124 static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
 125 static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
 126 static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
 127 static const char *ak4535_mic_select[] = {"Internal", "External"};
 128
 129 static const struct soc_enum ak4535_enum[] = {
 130         SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
 131         SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
 132         SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
 133         SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
 134         SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
 135 };
 136
 137 static const struct snd_kcontrol_new ak4535_snd_controls[] = {
 138         SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
 139         SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
 140         SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
 141         SOC_ENUM("Headphone Output", ak4535_enum[2]),
 142         SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
 143         SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
 144         SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
 145         SOC_ENUM("Mic Select", ak4535_enum[4]),
 146         SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
 147         SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
 148         SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
 149         SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
 150         SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
 151         SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
 152         SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
 153         SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
 154         SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
 155         SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
 156         SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
 157 };
 158
 159 /* add non dapm controls */
 160 static int ak4535_add_controls(struct snd_soc_codec *codec)
 161 {
 162         int err, i;
 163
 164         for (i = 0; i < ARRAY_SIZE(ak4535_snd_controls); i++) {
 165                 err = snd_ctl_add(codec->card,
 166                         snd_soc_cnew(&ak4535_snd_controls[i], codec, NULL));
 167                 if (err < 0)
 168                         return err;
 169         }
 170
 171         return 0;
 172 }
 173
 174 /* Mono 1 Mixer */
 175 static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
 176         SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
 177         SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
 178 };
 179
 180 /* Stereo Mixer */
 181 static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
 182         SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
 183         SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
 184         SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
 185 };
 186
 187 /* Input Mixer */
 188 static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
 189         SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
 190         SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
 191 };
 192
 193 /* Input mux */
 194 static const struct snd_kcontrol_new ak4535_input_mux_control =
 195         SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
 196
 197 /* HP L switch */
 198 static const struct snd_kcontrol_new ak4535_hpl_control =
 199         SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
 200
 201 /* HP R switch */
 202 static const struct snd_kcontrol_new ak4535_hpr_control =
 203         SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
 204
 205 /* mono 2 switch */
 206 static const struct snd_kcontrol_new ak4535_mono2_control =
 207         SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
 208
 209 /* Line out switch */
 210 static const struct snd_kcontrol_new ak4535_line_control =
 211         SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
 212
 213 /* ak4535 dapm widgets */
 214 static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
 215         SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
 216                 &ak4535_stereo_mixer_controls[0],
 217                 ARRAY_SIZE(ak4535_stereo_mixer_controls)),
 218         SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
 219                 &ak4535_mono1_mixer_controls[0],
 220                 ARRAY_SIZE(ak4535_mono1_mixer_controls)),
 221         SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
 222                 &ak4535_input_mixer_controls[0],
 223                 ARRAY_SIZE(ak4535_input_mixer_controls)),
 224         SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
 225                 &ak4535_input_mux_control),
 226         SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
 227         SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
 228                 &ak4535_mono2_control),
 229         /* speaker powersave bit */
 230         SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
 231         SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
 232                 &ak4535_line_control),
 233         SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
 234                 &ak4535_hpl_control),
 235         SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
 236                 &ak4535_hpr_control),
 237         SND_SOC_DAPM_OUTPUT("LOUT"),
 238         SND_SOC_DAPM_OUTPUT("HPL"),
 239         SND_SOC_DAPM_OUTPUT("ROUT"),
 240         SND_SOC_DAPM_OUTPUT("HPR"),
 241         SND_SOC_DAPM_OUTPUT("SPP"),
 242         SND_SOC_DAPM_OUTPUT("SPN"),
 243         SND_SOC_DAPM_OUTPUT("MOUT1"),
 244         SND_SOC_DAPM_OUTPUT("MOUT2"),
 245         SND_SOC_DAPM_OUTPUT("MICOUT"),
 246         SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
 247         SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
 248         SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
 249         SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
 250         SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
 251         SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
 252         SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
 253         SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
 254
 255         SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
 256         SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
 257         SND_SOC_DAPM_INPUT("MICIN"),
 258         SND_SOC_DAPM_INPUT("MICEXT"),
 259         SND_SOC_DAPM_INPUT("AUX"),
 260         SND_SOC_DAPM_INPUT("MIN"),
 261         SND_SOC_DAPM_INPUT("AIN"),
 262 };
 263
 264 static const struct snd_soc_dapm_route audio_map[] = {
 265         /*stereo mixer */
 266         {"Stereo Mixer", "Playback Switch", "DAC"},
 267         {"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
 268         {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
 269
 270         /* mono1 mixer */
 271         {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
 272         {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
 273
 274         /* Mic */
 275         {"Mic", NULL, "AIN"},
 276         {"Input Mux", "Internal", "Mic Int Bias"},
 277         {"Input Mux", "External", "Mic Ext Bias"},
 278         {"Mic Int Bias", NULL, "MICIN"},
 279         {"Mic Ext Bias", NULL, "MICEXT"},
 280         {"MICOUT", NULL, "Input Mux"},
 281
 282         /* line out */
 283         {"LOUT", NULL, "Line Out Enable"},
 284         {"ROUT", NULL, "Line Out Enable"},
 285         {"Line Out Enable", "Switch", "Line Out"},
 286         {"Line Out", NULL, "Stereo Mixer"},
 287
 288         /* mono1 out */
 289         {"MOUT1", NULL, "Mono Out"},
 290         {"Mono Out", NULL, "Mono1 Mixer"},
 291
 292         /* left HP */
 293         {"HPL", NULL, "Left HP Enable"},
 294         {"Left HP Enable", "Switch", "HP L Amp"},
 295         {"HP L Amp", NULL, "Stereo Mixer"},
 296
 297         /* right HP */
 298         {"HPR", NULL, "Right HP Enable"},
 299         {"Right HP Enable", "Switch", "HP R Amp"},
 300         {"HP R Amp", NULL, "Stereo Mixer"},
 301
 302         /* speaker */
 303         {"SPP", NULL, "Speaker Enable"},
 304         {"SPN", NULL, "Speaker Enable"},
 305         {"Speaker Enable", "Switch", "Spk Amp"},
 306         {"Spk Amp", NULL, "MIN"},
 307
 308         /* mono 2 */
 309         {"MOUT2", NULL, "Mono 2 Enable"},
 310         {"Mono 2 Enable", "Switch", "Stereo Mixer"},
 311
 312         /* Aux In */
 313         {"Aux In", NULL, "AUX"},
 314
 315         /* ADC */
 316         {"ADC", NULL, "Input Mixer"},
 317         {"Input Mixer", "Mic Capture Switch", "Mic"},
 318         {"Input Mixer", "Aux Capture Switch", "Aux In"},
 319 };
 320
 321 static int ak4535_add_widgets(struct snd_soc_codec *codec)
 322 {
 323         snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets,
 324                                   ARRAY_SIZE(ak4535_dapm_widgets));
 325
 326         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 327
 328         snd_soc_dapm_new_widgets(codec);
 329         return 0;
 330 }
 331
 332 static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 333         int clk_id, unsigned int freq, int dir)
 334 {
 335         struct snd_soc_codec *codec = codec_dai->codec;
 336         struct ak4535_priv *ak4535 = codec->private_data;
 337
 338         ak4535->sysclk = freq;
 339         return 0;
 340 }
 341
 342 static int ak4535_hw_params(struct snd_pcm_substream *substream,
 343         struct snd_pcm_hw_params *params)
 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         },
 456         .dai_ops = {
 457                 .set_fmt = ak4535_set_dai_fmt,
 458                 .digital_mute = ak4535_mute,
 459                 .set_sysclk = ak4535_set_dai_sysclk,
 460         },
 461 };
 462 EXPORT_SYMBOL_GPL(ak4535_dai);
 463
 464 static int ak4535_suspend(struct platform_device *pdev, pm_message_t state)
 465 {
 466         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 467         struct snd_soc_codec *codec = socdev->codec;
 468
 469         ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
 470         return 0;
 471 }
 472
 473 static int ak4535_resume(struct platform_device *pdev)
 474 {
 475         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 476         struct snd_soc_codec *codec = socdev->codec;
 477         ak4535_sync(codec);
 478         ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 479         ak4535_set_bias_level(codec, codec->suspend_bias_level);
 480         return 0;
 481 }
 482
 483 /*
 484  * initialise the AK4535 driver
 485  * register the mixer and dsp interfaces with the kernel
 486  */
 487 static int ak4535_init(struct snd_soc_device *socdev)
 488 {
 489         struct snd_soc_codec *codec = socdev->codec;
 490         int ret = 0;
 491
 492         codec->name = "AK4535";
 493         codec->owner = THIS_MODULE;
 494         codec->read = ak4535_read_reg_cache;
 495         codec->write = ak4535_write;
 496         codec->set_bias_level = ak4535_set_bias_level;
 497         codec->dai = &ak4535_dai;
 498         codec->num_dai = 1;
 499         codec->reg_cache_size = ARRAY_SIZE(ak4535_reg);
 500         codec->reg_cache = kmemdup(ak4535_reg, sizeof(ak4535_reg), GFP_KERNEL);
 501
 502         if (codec->reg_cache == NULL)
 503                 return -ENOMEM;
 504
 505         /* register pcms */
 506         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 507         if (ret < 0) {
 508                 printk(KERN_ERR "ak4535: failed to create pcms\n");
 509                 goto pcm_err;
 510         }
 511
 512         /* power on device */
 513         ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 514
 515         ak4535_add_controls(codec);
 516         ak4535_add_widgets(codec);
 517         ret = snd_soc_register_card(socdev);
 518         if (ret < 0) {
 519                 printk(KERN_ERR "ak4535: failed to register card\n");
 520                 goto card_err;
 521         }
 522
 523         return ret;
 524
 525 card_err:
 526         snd_soc_free_pcms(socdev);
 527         snd_soc_dapm_free(socdev);
 528 pcm_err:
 529         kfree(codec->reg_cache);
 530
 531         return ret;
 532 }
 533
 534 static struct snd_soc_device *ak4535_socdev;
 535
 536 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 537
 538 static int ak4535_i2c_probe(struct i2c_client *i2c,
 539                             const struct i2c_device_id *id)
 540 {
 541         struct snd_soc_device *socdev = ak4535_socdev;
 542         struct snd_soc_codec *codec = socdev->codec;
 543         int ret;
 544
 545         i2c_set_clientdata(i2c, codec);
 546         codec->control_data = i2c;
 547
 548         ret = ak4535_init(socdev);
 549         if (ret < 0)
 550                 printk(KERN_ERR "failed to initialise AK4535\n");
 551
 552         return ret;
 553 }
 554
 555 static int ak4535_i2c_remove(struct i2c_client *client)
 556 {
 557         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 558         kfree(codec->reg_cache);
 559         return 0;
 560 }
 561
 562 static const struct i2c_device_id ak4535_i2c_id[] = {
 563         { "ak4535", 0 },
 564         { }
 565 };
 566 MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
 567
 568 static struct i2c_driver ak4535_i2c_driver = {
 569         .driver = {
 570                 .name = "AK4535 I2C Codec",
 571                 .owner = THIS_MODULE,
 572         },
 573         .probe =    ak4535_i2c_probe,
 574         .remove =   ak4535_i2c_remove,
 575         .id_table = ak4535_i2c_id,
 576 };
 577
 578 static int ak4535_add_i2c_device(struct platform_device *pdev,
 579                                  const struct ak4535_setup_data *setup)
 580 {
 581         struct i2c_board_info info;
 582         struct i2c_adapter *adapter;
 583         struct i2c_client *client;
 584         int ret;
 585
 586         ret = i2c_add_driver(&ak4535_i2c_driver);
 587         if (ret != 0) {
 588                 dev_err(&pdev->dev, "can't add i2c driver\n");
 589                 return ret;
 590         }
 591
 592         memset(&info, 0, sizeof(struct i2c_board_info));
 593         info.addr = setup->i2c_address;
 594         strlcpy(info.type, "ak4535", I2C_NAME_SIZE);
 595
 596         adapter = i2c_get_adapter(setup->i2c_bus);
 597         if (!adapter) {
 598                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 599                         setup->i2c_bus);
 600                 goto err_driver;
 601         }
 602
 603         client = i2c_new_device(adapter, &info);
 604         i2c_put_adapter(adapter);
 605         if (!client) {
 606                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 607                         (unsigned int)info.addr);
 608                 goto err_driver;
 609         }
 610
 611         return 0;
 612
 613 err_driver:
 614         i2c_del_driver(&ak4535_i2c_driver);
 615         return -ENODEV;
 616 }
 617 #endif
 618
 619 static int ak4535_probe(struct platform_device *pdev)
 620 {
 621         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 622         struct ak4535_setup_data *setup;
 623         struct snd_soc_codec *codec;
 624         struct ak4535_priv *ak4535;
 625         int ret;
 626
 627         printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION);
 628
 629         setup = socdev->codec_data;
 630         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 631         if (codec == NULL)
 632                 return -ENOMEM;
 633
 634         ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL);
 635         if (ak4535 == NULL) {
 636                 kfree(codec);
 637                 return -ENOMEM;
 638         }
 639
 640         codec->private_data = ak4535;
 641         socdev->codec = codec;
 642         mutex_init(&codec->mutex);
 643         INIT_LIST_HEAD(&codec->dapm_widgets);
 644         INIT_LIST_HEAD(&codec->dapm_paths);
 645
 646         ak4535_socdev = socdev;
 647         ret = -ENODEV;
 648
 649 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 650         if (setup->i2c_address) {
 651                 codec->hw_write = (hw_write_t)i2c_master_send;
 652                 codec->hw_read = (hw_read_t)i2c_master_recv;
 653                 ret = ak4535_add_i2c_device(pdev, setup);
 654         }
 655 #endif
 656
 657         if (ret != 0) {
 658                 kfree(codec->private_data);
 659                 kfree(codec);
 660         }
 661         return ret;
 662 }
 663
 664 /* power down chip */
 665 static int ak4535_remove(struct platform_device *pdev)
 666 {
 667         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 668         struct snd_soc_codec *codec = socdev->codec;
 669
 670         if (codec->control_data)
 671                 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
 672
 673         snd_soc_free_pcms(socdev);
 674         snd_soc_dapm_free(socdev);
 675 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 676         i2c_unregister_device(codec->control_data);
 677         i2c_del_driver(&ak4535_i2c_driver);
 678 #endif
 679         kfree(codec->private_data);
 680         kfree(codec);
 681
 682         return 0;
 683 }
 684
 685 struct snd_soc_codec_device soc_codec_dev_ak4535 = {
 686         .probe =        ak4535_probe,
 687         .remove =       ak4535_remove,
 688         .suspend =      ak4535_suspend,
 689         .resume =       ak4535_resume,
 690 };
 691 EXPORT_SYMBOL_GPL(soc_codec_dev_ak4535);
 692
 693 MODULE_DESCRIPTION("Soc AK4535 driver");
 694 MODULE_AUTHOR("Richard Purdie");
 695 MODULE_LICENSE("GPL");