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 <linux/slab.h> 23#include <sound/core.h> 24#include <sound/pcm.h> 25#include <sound/pcm_params.h> 26#include <sound/soc.h> 27#include <sound/soc-dapm.h> 28#include <sound/initval.h> 29 30#include "ak4535.h" 31 32#define AK4535_VERSION "0.3" 33 34struct snd_soc_codec_device soc_codec_dev_ak4535; 35 36/* codec private data */ 37struct ak4535_priv { 38 unsigned int sysclk; 39}; 40 41/* 42 * ak4535 register cache 43 */ 44static 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 */ 54static 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/* 64 * write ak4535 register cache 65 */ 66static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec, 67 u16 reg, unsigned int value) 68{ 69 u16 *cache = codec->reg_cache; 70 if (reg >= AK4535_CACHEREGNUM) 71 return; 72 cache[reg] = value; 73} 74 75/* 76 * write to the AK4535 register space 77 */ 78static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg, 79 unsigned int value) 80{ 81 u8 data[2]; 82 83 /* data is 84 * D15..D8 AK4535 register offset 85 * D7...D0 register data 86 */ 87 data[0] = reg & 0xff; 88 data[1] = value & 0xff; 89 90 ak4535_write_reg_cache(codec, reg, value); 91 if (codec->hw_write(codec->control_data, data, 2) == 2) 92 return 0; 93 else 94 return -EIO; 95} 96 97static int ak4535_sync(struct snd_soc_codec *codec) 98{ 99 u16 *cache = codec->reg_cache; 100 int i, r = 0; 101 102 for (i = 0; i < AK4535_CACHEREGNUM; i++) 103 r |= ak4535_write(codec, i, cache[i]); 104 105 return r; 106}; 107 108static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"}; 109static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"}; 110static const char *ak4535_hp_out[] = {"Stereo", "Mono"}; 111static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"}; 112static const char *ak4535_mic_select[] = {"Internal", "External"}; 113 114static const struct soc_enum ak4535_enum[] = { 115 SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain), 116 SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out), 117 SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out), 118 SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp), 119 SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select), 120}; 121 122static const struct snd_kcontrol_new ak4535_snd_controls[] = { 123 SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0), 124 SOC_ENUM("Mono 1 Output", ak4535_enum[1]), 125 SOC_ENUM("Mono 1 Gain", ak4535_enum[0]), 126 SOC_ENUM("Headphone Output", ak4535_enum[2]), 127 SOC_ENUM("Playback Deemphasis", ak4535_enum[3]), 128 SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0), 129 SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0), 130 SOC_ENUM("Mic Select", ak4535_enum[4]), 131 SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0), 132 SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0), 133 SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0), 134 SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0), 135 SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0), 136 SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0), 137 SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0), 138 SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1), 139 SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1), 140 SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0), 141 SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0), 142}; 143 144/* Mono 1 Mixer */ 145static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = { 146 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0), 147 SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0), 148}; 149 150/* Stereo Mixer */ 151static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = { 152 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0), 153 SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0), 154 SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0), 155}; 156 157/* Input Mixer */ 158static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = { 159 SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0), 160 SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0), 161}; 162 163/* Input mux */ 164static const struct snd_kcontrol_new ak4535_input_mux_control = 165 SOC_DAPM_ENUM("Input Select", ak4535_enum[4]); 166 167/* HP L switch */ 168static const struct snd_kcontrol_new ak4535_hpl_control = 169 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1); 170 171/* HP R switch */ 172static const struct snd_kcontrol_new ak4535_hpr_control = 173 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1); 174 175/* mono 2 switch */ 176static const struct snd_kcontrol_new ak4535_mono2_control = 177 SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0); 178 179/* Line out switch */ 180static const struct snd_kcontrol_new ak4535_line_control = 181 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0); 182 183/* ak4535 dapm widgets */ 184static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = { 185 SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0, 186 &ak4535_stereo_mixer_controls[0], 187 ARRAY_SIZE(ak4535_stereo_mixer_controls)), 188 SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0, 189 &ak4535_mono1_mixer_controls[0], 190 ARRAY_SIZE(ak4535_mono1_mixer_controls)), 191 SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, 192 &ak4535_input_mixer_controls[0], 193 ARRAY_SIZE(ak4535_input_mixer_controls)), 194 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, 195 &ak4535_input_mux_control), 196 SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0), 197 SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0, 198 &ak4535_mono2_control), 199 /* speaker powersave bit */ 200 SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0), 201 SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0, 202 &ak4535_line_control), 203 SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0, 204 &ak4535_hpl_control), 205 SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0, 206 &ak4535_hpr_control), 207 SND_SOC_DAPM_OUTPUT("LOUT"), 208 SND_SOC_DAPM_OUTPUT("HPL"), 209 SND_SOC_DAPM_OUTPUT("ROUT"), 210 SND_SOC_DAPM_OUTPUT("HPR"), 211 SND_SOC_DAPM_OUTPUT("SPP"), 212 SND_SOC_DAPM_OUTPUT("SPN"), 213 SND_SOC_DAPM_OUTPUT("MOUT1"), 214 SND_SOC_DAPM_OUTPUT("MOUT2"), 215 SND_SOC_DAPM_OUTPUT("MICOUT"), 216 SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0), 217 SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0), 218 SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0), 219 SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0), 220 SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0), 221 SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0), 222 SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0), 223 SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0), 224 225 SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0), 226 SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0), 227 SND_SOC_DAPM_INPUT("MICIN"), 228 SND_SOC_DAPM_INPUT("MICEXT"), 229 SND_SOC_DAPM_INPUT("AUX"), 230 SND_SOC_DAPM_INPUT("MIN"), 231 SND_SOC_DAPM_INPUT("AIN"), 232}; 233 234static const struct snd_soc_dapm_route audio_map[] = { 235 /*stereo mixer */ 236 {"Stereo Mixer", "Playback Switch", "DAC"}, 237 {"Stereo Mixer", "Mic Sidetone Switch", "Mic"}, 238 {"Stereo Mixer", "Aux Bypass Switch", "AUX In"}, 239 240 /* mono1 mixer */ 241 {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"}, 242 {"Mono1 Mixer", "Mono Playback Switch", "DAC"}, 243 244 /* Mic */ 245 {"Mic", NULL, "AIN"}, 246 {"Input Mux", "Internal", "Mic Int Bias"}, 247 {"Input Mux", "External", "Mic Ext Bias"}, 248 {"Mic Int Bias", NULL, "MICIN"}, 249 {"Mic Ext Bias", NULL, "MICEXT"}, 250 {"MICOUT", NULL, "Input Mux"}, 251 252 /* line out */ 253 {"LOUT", NULL, "Line Out Enable"}, 254 {"ROUT", NULL, "Line Out Enable"}, 255 {"Line Out Enable", "Switch", "Line Out"}, 256 {"Line Out", NULL, "Stereo Mixer"}, 257 258 /* mono1 out */ 259 {"MOUT1", NULL, "Mono Out"}, 260 {"Mono Out", NULL, "Mono1 Mixer"}, 261 262 /* left HP */ 263 {"HPL", NULL, "Left HP Enable"}, 264 {"Left HP Enable", "Switch", "HP L Amp"}, 265 {"HP L Amp", NULL, "Stereo Mixer"}, 266 267 /* right HP */ 268 {"HPR", NULL, "Right HP Enable"}, 269 {"Right HP Enable", "Switch", "HP R Amp"}, 270 {"HP R Amp", NULL, "Stereo Mixer"}, 271 272 /* speaker */ 273 {"SPP", NULL, "Speaker Enable"}, 274 {"SPN", NULL, "Speaker Enable"}, 275 {"Speaker Enable", "Switch", "Spk Amp"}, 276 {"Spk Amp", NULL, "MIN"}, 277 278 /* mono 2 */ 279 {"MOUT2", NULL, "Mono 2 Enable"}, 280 {"Mono 2 Enable", "Switch", "Stereo Mixer"}, 281 282 /* Aux In */ 283 {"Aux In", NULL, "AUX"}, 284 285 /* ADC */ 286 {"ADC", NULL, "Input Mixer"}, 287 {"Input Mixer", "Mic Capture Switch", "Mic"}, 288 {"Input Mixer", "Aux Capture Switch", "Aux In"}, 289}; 290 291static int ak4535_add_widgets(struct snd_soc_codec *codec) 292{ 293 snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets, 294 ARRAY_SIZE(ak4535_dapm_widgets)); 295 296 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 297 298 return 0; 299} 300 301static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai, 302 int clk_id, unsigned int freq, int dir) 303{ 304 struct snd_soc_codec *codec = codec_dai->codec; 305 struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec); 306 307 ak4535->sysclk = freq; 308 return 0; 309} 310 311static int ak4535_hw_params(struct snd_pcm_substream *substream, 312 struct snd_pcm_hw_params *params, 313 struct snd_soc_dai *dai) 314{ 315 struct snd_soc_pcm_runtime *rtd = substream->private_data; 316 struct snd_soc_device *socdev = rtd->socdev; 317 struct snd_soc_codec *codec = socdev->card->codec; 318 struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec); 319 u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5); 320 int rate = params_rate(params), fs = 256; 321 322 if (rate) 323 fs = ak4535->sysclk / rate; 324 325 /* set fs */ 326 switch (fs) { 327 case 1024: 328 mode2 |= (0x2 << 5); 329 break; 330 case 512: 331 mode2 |= (0x1 << 5); 332 break; 333 case 256: 334 break; 335 } 336 337 /* set rate */ 338 ak4535_write(codec, AK4535_MODE2, mode2); 339 return 0; 340} 341 342static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai, 343 unsigned int fmt) 344{ 345 struct snd_soc_codec *codec = codec_dai->codec; 346 u8 mode1 = 0; 347 348 /* interface format */ 349 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 350 case SND_SOC_DAIFMT_I2S: 351 mode1 = 0x0002; 352 break; 353 case SND_SOC_DAIFMT_LEFT_J: 354 mode1 = 0x0001; 355 break; 356 default: 357 return -EINVAL; 358 } 359 360 /* use 32 fs for BCLK to save power */ 361 mode1 |= 0x4; 362 363 ak4535_write(codec, AK4535_MODE1, mode1); 364 return 0; 365} 366 367static int ak4535_mute(struct snd_soc_dai *dai, int mute) 368{ 369 struct snd_soc_codec *codec = dai->codec; 370 u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf; 371 if (!mute) 372 ak4535_write(codec, AK4535_DAC, mute_reg); 373 else 374 ak4535_write(codec, AK4535_DAC, mute_reg | 0x20); 375 return 0; 376} 377 378static int ak4535_set_bias_level(struct snd_soc_codec *codec, 379 enum snd_soc_bias_level level) 380{ 381 u16 i; 382 383 switch (level) { 384 case SND_SOC_BIAS_ON: 385 ak4535_mute(codec->dai, 0); 386 break; 387 case SND_SOC_BIAS_PREPARE: 388 ak4535_mute(codec->dai, 1); 389 break; 390 case SND_SOC_BIAS_STANDBY: 391 i = ak4535_read_reg_cache(codec, AK4535_PM1); 392 ak4535_write(codec, AK4535_PM1, i | 0x80); 393 i = ak4535_read_reg_cache(codec, AK4535_PM2); 394 ak4535_write(codec, AK4535_PM2, i & (~0x80)); 395 break; 396 case SND_SOC_BIAS_OFF: 397 i = ak4535_read_reg_cache(codec, AK4535_PM1); 398 ak4535_write(codec, AK4535_PM1, i & (~0x80)); 399 break; 400 } 401 codec->bias_level = level; 402 return 0; 403} 404 405#define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 406 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ 407 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) 408 409static struct snd_soc_dai_ops ak4535_dai_ops = { 410 .hw_params = ak4535_hw_params, 411 .set_fmt = ak4535_set_dai_fmt, 412 .digital_mute = ak4535_mute, 413 .set_sysclk = ak4535_set_dai_sysclk, 414}; 415 416struct snd_soc_dai ak4535_dai = { 417 .name = "AK4535", 418 .playback = { 419 .stream_name = "Playback", 420 .channels_min = 1, 421 .channels_max = 2, 422 .rates = AK4535_RATES, 423 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 424 .capture = { 425 .stream_name = "Capture", 426 .channels_min = 1, 427 .channels_max = 2, 428 .rates = AK4535_RATES, 429 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 430 .ops = &ak4535_dai_ops, 431}; 432EXPORT_SYMBOL_GPL(ak4535_dai); 433 434static int ak4535_suspend(struct platform_device *pdev, pm_message_t state) 435{ 436 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 437 struct snd_soc_codec *codec = socdev->card->codec; 438 439 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF); 440 return 0; 441} 442 443static int ak4535_resume(struct platform_device *pdev) 444{ 445 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 446 struct snd_soc_codec *codec = socdev->card->codec; 447 ak4535_sync(codec); 448 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 449 return 0; 450} 451 452/* 453 * initialise the AK4535 driver 454 * register the mixer and dsp interfaces with the kernel 455 */ 456static int ak4535_init(struct snd_soc_device *socdev) 457{ 458 struct snd_soc_codec *codec = socdev->card->codec; 459 int ret = 0; 460 461 codec->name = "AK4535"; 462 codec->owner = THIS_MODULE; 463 codec->read = ak4535_read_reg_cache; 464 codec->write = ak4535_write; 465 codec->set_bias_level = ak4535_set_bias_level; 466 codec->dai = &ak4535_dai; 467 codec->num_dai = 1; 468 codec->reg_cache_size = ARRAY_SIZE(ak4535_reg); 469 codec->reg_cache = kmemdup(ak4535_reg, sizeof(ak4535_reg), GFP_KERNEL); 470 471 if (codec->reg_cache == NULL) 472 return -ENOMEM; 473 474 /* register pcms */ 475 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 476 if (ret < 0) { 477 printk(KERN_ERR "ak4535: failed to create pcms\n"); 478 goto pcm_err; 479 } 480 481 /* power on device */ 482 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 483 484 snd_soc_add_controls(codec, ak4535_snd_controls, 485 ARRAY_SIZE(ak4535_snd_controls)); 486 ak4535_add_widgets(codec); 487 488 return ret; 489 490pcm_err: 491 kfree(codec->reg_cache); 492 493 return ret; 494} 495 496static struct snd_soc_device *ak4535_socdev; 497 498#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 499 500static int ak4535_i2c_probe(struct i2c_client *i2c, 501 const struct i2c_device_id *id) 502{ 503 struct snd_soc_device *socdev = ak4535_socdev; 504 struct snd_soc_codec *codec = socdev->card->codec; 505 int ret; 506 507 i2c_set_clientdata(i2c, codec); 508 codec->control_data = i2c; 509 510 ret = ak4535_init(socdev); 511 if (ret < 0) 512 printk(KERN_ERR "failed to initialise AK4535\n"); 513 514 return ret; 515} 516 517static int ak4535_i2c_remove(struct i2c_client *client) 518{ 519 struct snd_soc_codec *codec = i2c_get_clientdata(client); 520 kfree(codec->reg_cache); 521 return 0; 522} 523 524static const struct i2c_device_id ak4535_i2c_id[] = { 525 { "ak4535", 0 }, 526 { } 527}; 528MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id); 529 530static struct i2c_driver ak4535_i2c_driver = { 531 .driver = { 532 .name = "AK4535 I2C Codec", 533 .owner = THIS_MODULE, 534 }, 535 .probe = ak4535_i2c_probe, 536 .remove = ak4535_i2c_remove, 537 .id_table = ak4535_i2c_id, 538}; 539 540static int ak4535_add_i2c_device(struct platform_device *pdev, 541 const struct ak4535_setup_data *setup) 542{ 543 struct i2c_board_info info; 544 struct i2c_adapter *adapter; 545 struct i2c_client *client; 546 int ret; 547 548 ret = i2c_add_driver(&ak4535_i2c_driver); 549 if (ret != 0) { 550 dev_err(&pdev->dev, "can't add i2c driver\n"); 551 return ret; 552 } 553 554 memset(&info, 0, sizeof(struct i2c_board_info)); 555 info.addr = setup->i2c_address; 556 strlcpy(info.type, "ak4535", I2C_NAME_SIZE); 557 558 adapter = i2c_get_adapter(setup->i2c_bus); 559 if (!adapter) { 560 dev_err(&pdev->dev, "can't get i2c adapter %d\n", 561 setup->i2c_bus); 562 goto err_driver; 563 } 564 565 client = i2c_new_device(adapter, &info); 566 i2c_put_adapter(adapter); 567 if (!client) { 568 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", 569 (unsigned int)info.addr); 570 goto err_driver; 571 } 572 573 return 0; 574 575err_driver: 576 i2c_del_driver(&ak4535_i2c_driver); 577 return -ENODEV; 578} 579#endif 580 581static int ak4535_probe(struct platform_device *pdev) 582{ 583 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 584 struct ak4535_setup_data *setup; 585 struct snd_soc_codec *codec; 586 struct ak4535_priv *ak4535; 587 int ret; 588 589 printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION); 590 591 setup = socdev->codec_data; 592 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 593 if (codec == NULL) 594 return -ENOMEM; 595 596 ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL); 597 if (ak4535 == NULL) { 598 kfree(codec); 599 return -ENOMEM; 600 } 601 602 snd_soc_codec_set_drvdata(codec, ak4535); 603 socdev->card->codec = codec; 604 mutex_init(&codec->mutex); 605 INIT_LIST_HEAD(&codec->dapm_widgets); 606 INIT_LIST_HEAD(&codec->dapm_paths); 607 608 ak4535_socdev = socdev; 609 ret = -ENODEV; 610 611#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 612 if (setup->i2c_address) { 613 codec->hw_write = (hw_write_t)i2c_master_send; 614 ret = ak4535_add_i2c_device(pdev, setup); 615 } 616#endif 617 618 if (ret != 0) { 619 kfree(snd_soc_codec_get_drvdata(codec)); 620 kfree(codec); 621 } 622 return ret; 623} 624 625/* power down chip */ 626static int ak4535_remove(struct platform_device *pdev) 627{ 628 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 629 struct snd_soc_codec *codec = socdev->card->codec; 630 631 if (codec->control_data) 632 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF); 633 634 snd_soc_free_pcms(socdev); 635 snd_soc_dapm_free(socdev); 636#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 637 if (codec->control_data) 638 i2c_unregister_device(codec->control_data); 639 i2c_del_driver(&ak4535_i2c_driver); 640#endif 641 kfree(snd_soc_codec_get_drvdata(codec)); 642 kfree(codec); 643 644 return 0; 645} 646 647struct snd_soc_codec_device soc_codec_dev_ak4535 = { 648 .probe = ak4535_probe, 649 .remove = ak4535_remove, 650 .suspend = ak4535_suspend, 651 .resume = ak4535_resume, 652}; 653EXPORT_SYMBOL_GPL(soc_codec_dev_ak4535); 654 655static int __init ak4535_modinit(void) 656{ 657 return snd_soc_register_dai(&ak4535_dai); 658} 659module_init(ak4535_modinit); 660 661static void __exit ak4535_exit(void) 662{ 663 snd_soc_unregister_dai(&ak4535_dai); 664} 665module_exit(ak4535_exit); 666 667MODULE_DESCRIPTION("Soc AK4535 driver"); 668MODULE_AUTHOR("Richard Purdie"); 669MODULE_LICENSE("GPL"); 670