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 /* Mono 1 Mixer */ 159 static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = { 160 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0), 161 SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0), 162 }; 163 164 /* Stereo Mixer */ 165 static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = { 166 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0), 167 SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0), 168 SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0), 169 }; 170 171 /* Input Mixer */ 172 static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = { 173 SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0), 174 SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0), 175 }; 176 177 /* Input mux */ 178 static const struct snd_kcontrol_new ak4535_input_mux_control = 179 SOC_DAPM_ENUM("Input Select", ak4535_enum[4]); 180 181 /* HP L switch */ 182 static const struct snd_kcontrol_new ak4535_hpl_control = 183 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1); 184 185 /* HP R switch */ 186 static const struct snd_kcontrol_new ak4535_hpr_control = 187 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1); 188 189 /* mono 2 switch */ 190 static const struct snd_kcontrol_new ak4535_mono2_control = 191 SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0); 192 193 /* Line out switch */ 194 static const struct snd_kcontrol_new ak4535_line_control = 195 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0); 196 197 /* ak4535 dapm widgets */ 198 static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = { 199 SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0, 200 &ak4535_stereo_mixer_controls[0], 201 ARRAY_SIZE(ak4535_stereo_mixer_controls)), 202 SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0, 203 &ak4535_mono1_mixer_controls[0], 204 ARRAY_SIZE(ak4535_mono1_mixer_controls)), 205 SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, 206 &ak4535_input_mixer_controls[0], 207 ARRAY_SIZE(ak4535_input_mixer_controls)), 208 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, 209 &ak4535_input_mux_control), 210 SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0), 211 SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0, 212 &ak4535_mono2_control), 213 /* speaker powersave bit */ 214 SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0), 215 SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0, 216 &ak4535_line_control), 217 SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0, 218 &ak4535_hpl_control), 219 SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0, 220 &ak4535_hpr_control), 221 SND_SOC_DAPM_OUTPUT("LOUT"), 222 SND_SOC_DAPM_OUTPUT("HPL"), 223 SND_SOC_DAPM_OUTPUT("ROUT"), 224 SND_SOC_DAPM_OUTPUT("HPR"), 225 SND_SOC_DAPM_OUTPUT("SPP"), 226 SND_SOC_DAPM_OUTPUT("SPN"), 227 SND_SOC_DAPM_OUTPUT("MOUT1"), 228 SND_SOC_DAPM_OUTPUT("MOUT2"), 229 SND_SOC_DAPM_OUTPUT("MICOUT"), 230 SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0), 231 SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0), 232 SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0), 233 SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0), 234 SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0), 235 SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0), 236 SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0), 237 SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0), 238 239 SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0), 240 SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0), 241 SND_SOC_DAPM_INPUT("MICIN"), 242 SND_SOC_DAPM_INPUT("MICEXT"), 243 SND_SOC_DAPM_INPUT("AUX"), 244 SND_SOC_DAPM_INPUT("MIN"), 245 SND_SOC_DAPM_INPUT("AIN"), 246 }; 247 248 static const struct snd_soc_dapm_route audio_map[] = { 249 /*stereo mixer */ 250 {"Stereo Mixer", "Playback Switch", "DAC"}, 251 {"Stereo Mixer", "Mic Sidetone Switch", "Mic"}, 252 {"Stereo Mixer", "Aux Bypass Switch", "AUX In"}, 253 254 /* mono1 mixer */ 255 {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"}, 256 {"Mono1 Mixer", "Mono Playback Switch", "DAC"}, 257 258 /* Mic */ 259 {"Mic", NULL, "AIN"}, 260 {"Input Mux", "Internal", "Mic Int Bias"}, 261 {"Input Mux", "External", "Mic Ext Bias"}, 262 {"Mic Int Bias", NULL, "MICIN"}, 263 {"Mic Ext Bias", NULL, "MICEXT"}, 264 {"MICOUT", NULL, "Input Mux"}, 265 266 /* line out */ 267 {"LOUT", NULL, "Line Out Enable"}, 268 {"ROUT", NULL, "Line Out Enable"}, 269 {"Line Out Enable", "Switch", "Line Out"}, 270 {"Line Out", NULL, "Stereo Mixer"}, 271 272 /* mono1 out */ 273 {"MOUT1", NULL, "Mono Out"}, 274 {"Mono Out", NULL, "Mono1 Mixer"}, 275 276 /* left HP */ 277 {"HPL", NULL, "Left HP Enable"}, 278 {"Left HP Enable", "Switch", "HP L Amp"}, 279 {"HP L Amp", NULL, "Stereo Mixer"}, 280 281 /* right HP */ 282 {"HPR", NULL, "Right HP Enable"}, 283 {"Right HP Enable", "Switch", "HP R Amp"}, 284 {"HP R Amp", NULL, "Stereo Mixer"}, 285 286 /* speaker */ 287 {"SPP", NULL, "Speaker Enable"}, 288 {"SPN", NULL, "Speaker Enable"}, 289 {"Speaker Enable", "Switch", "Spk Amp"}, 290 {"Spk Amp", NULL, "MIN"}, 291 292 /* mono 2 */ 293 {"MOUT2", NULL, "Mono 2 Enable"}, 294 {"Mono 2 Enable", "Switch", "Stereo Mixer"}, 295 296 /* Aux In */ 297 {"Aux In", NULL, "AUX"}, 298 299 /* ADC */ 300 {"ADC", NULL, "Input Mixer"}, 301 {"Input Mixer", "Mic Capture Switch", "Mic"}, 302 {"Input Mixer", "Aux Capture Switch", "Aux In"}, 303 }; 304 305 static int ak4535_add_widgets(struct snd_soc_codec *codec) 306 { 307 snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets, 308 ARRAY_SIZE(ak4535_dapm_widgets)); 309 310 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 311 312 snd_soc_dapm_new_widgets(codec); 313 return 0; 314 } 315 316 static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai, 317 int clk_id, unsigned int freq, int dir) 318 { 319 struct snd_soc_codec *codec = codec_dai->codec; 320 struct ak4535_priv *ak4535 = codec->private_data; 321 322 ak4535->sysclk = freq; 323 return 0; 324 } 325 326 static int ak4535_hw_params(struct snd_pcm_substream *substream, 327 struct snd_pcm_hw_params *params, 328 struct snd_soc_dai *dai) 329 { 330 struct snd_soc_pcm_runtime *rtd = substream->private_data; 331 struct snd_soc_device *socdev = rtd->socdev; 332 struct snd_soc_codec *codec = socdev->card->codec; 333 struct ak4535_priv *ak4535 = codec->private_data; 334 u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5); 335 int rate = params_rate(params), fs = 256; 336 337 if (rate) 338 fs = ak4535->sysclk / rate; 339 340 /* set fs */ 341 switch (fs) { 342 case 1024: 343 mode2 |= (0x2 << 5); 344 break; 345 case 512: 346 mode2 |= (0x1 << 5); 347 break; 348 case 256: 349 break; 350 } 351 352 /* set rate */ 353 ak4535_write(codec, AK4535_MODE2, mode2); 354 return 0; 355 } 356 357 static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai, 358 unsigned int fmt) 359 { 360 struct snd_soc_codec *codec = codec_dai->codec; 361 u8 mode1 = 0; 362 363 /* interface format */ 364 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 365 case SND_SOC_DAIFMT_I2S: 366 mode1 = 0x0002; 367 break; 368 case SND_SOC_DAIFMT_LEFT_J: 369 mode1 = 0x0001; 370 break; 371 default: 372 return -EINVAL; 373 } 374 375 /* use 32 fs for BCLK to save power */ 376 mode1 |= 0x4; 377 378 ak4535_write(codec, AK4535_MODE1, mode1); 379 return 0; 380 } 381 382 static int ak4535_mute(struct snd_soc_dai *dai, int mute) 383 { 384 struct snd_soc_codec *codec = dai->codec; 385 u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf; 386 if (!mute) 387 ak4535_write(codec, AK4535_DAC, mute_reg); 388 else 389 ak4535_write(codec, AK4535_DAC, mute_reg | 0x20); 390 return 0; 391 } 392 393 static int ak4535_set_bias_level(struct snd_soc_codec *codec, 394 enum snd_soc_bias_level level) 395 { 396 u16 i; 397 398 switch (level) { 399 case SND_SOC_BIAS_ON: 400 ak4535_mute(codec->dai, 0); 401 break; 402 case SND_SOC_BIAS_PREPARE: 403 ak4535_mute(codec->dai, 1); 404 break; 405 case SND_SOC_BIAS_STANDBY: 406 i = ak4535_read_reg_cache(codec, AK4535_PM1); 407 ak4535_write(codec, AK4535_PM1, i | 0x80); 408 i = ak4535_read_reg_cache(codec, AK4535_PM2); 409 ak4535_write(codec, AK4535_PM2, i & (~0x80)); 410 break; 411 case SND_SOC_BIAS_OFF: 412 i = ak4535_read_reg_cache(codec, AK4535_PM1); 413 ak4535_write(codec, AK4535_PM1, i & (~0x80)); 414 break; 415 } 416 codec->bias_level = level; 417 return 0; 418 } 419 420 #define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 421 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ 422 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) 423 424 static struct snd_soc_dai_ops ak4535_dai_ops = { 425 .hw_params = ak4535_hw_params, 426 .set_fmt = ak4535_set_dai_fmt, 427 .digital_mute = ak4535_mute, 428 .set_sysclk = ak4535_set_dai_sysclk, 429 }; 430 431 struct snd_soc_dai ak4535_dai = { 432 .name = "AK4535", 433 .playback = { 434 .stream_name = "Playback", 435 .channels_min = 1, 436 .channels_max = 2, 437 .rates = AK4535_RATES, 438 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 439 .capture = { 440 .stream_name = "Capture", 441 .channels_min = 1, 442 .channels_max = 2, 443 .rates = AK4535_RATES, 444 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 445 .ops = &ak4535_dai_ops, 446 }; 447 EXPORT_SYMBOL_GPL(ak4535_dai); 448 449 static int ak4535_suspend(struct platform_device *pdev, pm_message_t state) 450 { 451 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 452 struct snd_soc_codec *codec = socdev->card->codec; 453 454 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF); 455 return 0; 456 } 457 458 static int ak4535_resume(struct platform_device *pdev) 459 { 460 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 461 struct snd_soc_codec *codec = socdev->card->codec; 462 ak4535_sync(codec); 463 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 464 ak4535_set_bias_level(codec, codec->suspend_bias_level); 465 return 0; 466 } 467 468 /* 469 * initialise the AK4535 driver 470 * register the mixer and dsp interfaces with the kernel 471 */ 472 static int ak4535_init(struct snd_soc_device *socdev) 473 { 474 struct snd_soc_codec *codec = socdev->card->codec; 475 int ret = 0; 476 477 codec->name = "AK4535"; 478 codec->owner = THIS_MODULE; 479 codec->read = ak4535_read_reg_cache; 480 codec->write = ak4535_write; 481 codec->set_bias_level = ak4535_set_bias_level; 482 codec->dai = &ak4535_dai; 483 codec->num_dai = 1; 484 codec->reg_cache_size = ARRAY_SIZE(ak4535_reg); 485 codec->reg_cache = kmemdup(ak4535_reg, sizeof(ak4535_reg), GFP_KERNEL); 486 487 if (codec->reg_cache == NULL) 488 return -ENOMEM; 489 490 /* register pcms */ 491 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 492 if (ret < 0) { 493 printk(KERN_ERR "ak4535: failed to create pcms\n"); 494 goto pcm_err; 495 } 496 497 /* power on device */ 498 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 499 500 snd_soc_add_controls(codec, ak4535_snd_controls, 501 ARRAY_SIZE(ak4535_snd_controls)); 502 ak4535_add_widgets(codec); 503 ret = snd_soc_init_card(socdev); 504 if (ret < 0) { 505 printk(KERN_ERR "ak4535: failed to register card\n"); 506 goto card_err; 507 } 508 509 return ret; 510 511 card_err: 512 snd_soc_free_pcms(socdev); 513 snd_soc_dapm_free(socdev); 514 pcm_err: 515 kfree(codec->reg_cache); 516 517 return ret; 518 } 519 520 static struct snd_soc_device *ak4535_socdev; 521 522 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 523 524 static int ak4535_i2c_probe(struct i2c_client *i2c, 525 const struct i2c_device_id *id) 526 { 527 struct snd_soc_device *socdev = ak4535_socdev; 528 struct snd_soc_codec *codec = socdev->card->codec; 529 int ret; 530 531 i2c_set_clientdata(i2c, codec); 532 codec->control_data = i2c; 533 534 ret = ak4535_init(socdev); 535 if (ret < 0) 536 printk(KERN_ERR "failed to initialise AK4535\n"); 537 538 return ret; 539 } 540 541 static int ak4535_i2c_remove(struct i2c_client *client) 542 { 543 struct snd_soc_codec *codec = i2c_get_clientdata(client); 544 kfree(codec->reg_cache); 545 return 0; 546 } 547 548 static const struct i2c_device_id ak4535_i2c_id[] = { 549 { "ak4535", 0 }, 550 { } 551 }; 552 MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id); 553 554 static struct i2c_driver ak4535_i2c_driver = { 555 .driver = { 556 .name = "AK4535 I2C Codec", 557 .owner = THIS_MODULE, 558 }, 559 .probe = ak4535_i2c_probe, 560 .remove = ak4535_i2c_remove, 561 .id_table = ak4535_i2c_id, 562 }; 563 564 static int ak4535_add_i2c_device(struct platform_device *pdev, 565 const struct ak4535_setup_data *setup) 566 { 567 struct i2c_board_info info; 568 struct i2c_adapter *adapter; 569 struct i2c_client *client; 570 int ret; 571 572 ret = i2c_add_driver(&ak4535_i2c_driver); 573 if (ret != 0) { 574 dev_err(&pdev->dev, "can't add i2c driver\n"); 575 return ret; 576 } 577 578 memset(&info, 0, sizeof(struct i2c_board_info)); 579 info.addr = setup->i2c_address; 580 strlcpy(info.type, "ak4535", I2C_NAME_SIZE); 581 582 adapter = i2c_get_adapter(setup->i2c_bus); 583 if (!adapter) { 584 dev_err(&pdev->dev, "can't get i2c adapter %d\n", 585 setup->i2c_bus); 586 goto err_driver; 587 } 588 589 client = i2c_new_device(adapter, &info); 590 i2c_put_adapter(adapter); 591 if (!client) { 592 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", 593 (unsigned int)info.addr); 594 goto err_driver; 595 } 596 597 return 0; 598 599 err_driver: 600 i2c_del_driver(&ak4535_i2c_driver); 601 return -ENODEV; 602 } 603 #endif 604 605 static int ak4535_probe(struct platform_device *pdev) 606 { 607 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 608 struct ak4535_setup_data *setup; 609 struct snd_soc_codec *codec; 610 struct ak4535_priv *ak4535; 611 int ret; 612 613 printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION); 614 615 setup = socdev->codec_data; 616 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 617 if (codec == NULL) 618 return -ENOMEM; 619 620 ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL); 621 if (ak4535 == NULL) { 622 kfree(codec); 623 return -ENOMEM; 624 } 625 626 codec->private_data = ak4535; 627 socdev->card->codec = codec; 628 mutex_init(&codec->mutex); 629 INIT_LIST_HEAD(&codec->dapm_widgets); 630 INIT_LIST_HEAD(&codec->dapm_paths); 631 632 ak4535_socdev = socdev; 633 ret = -ENODEV; 634 635 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 636 if (setup->i2c_address) { 637 codec->hw_write = (hw_write_t)i2c_master_send; 638 codec->hw_read = (hw_read_t)i2c_master_recv; 639 ret = ak4535_add_i2c_device(pdev, setup); 640 } 641 #endif 642 643 if (ret != 0) { 644 kfree(codec->private_data); 645 kfree(codec); 646 } 647 return ret; 648 } 649 650 /* power down chip */ 651 static int ak4535_remove(struct platform_device *pdev) 652 { 653 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 654 struct snd_soc_codec *codec = socdev->card->codec; 655 656 if (codec->control_data) 657 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF); 658 659 snd_soc_free_pcms(socdev); 660 snd_soc_dapm_free(socdev); 661 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 662 if (codec->control_data) 663 i2c_unregister_device(codec->control_data); 664 i2c_del_driver(&ak4535_i2c_driver); 665 #endif 666 kfree(codec->private_data); 667 kfree(codec); 668 669 return 0; 670 } 671 672 struct snd_soc_codec_device soc_codec_dev_ak4535 = { 673 .probe = ak4535_probe, 674 .remove = ak4535_remove, 675 .suspend = ak4535_suspend, 676 .resume = ak4535_resume, 677 }; 678 EXPORT_SYMBOL_GPL(soc_codec_dev_ak4535); 679 680 static int __init ak4535_modinit(void) 681 { 682 return snd_soc_register_dai(&ak4535_dai); 683 } 684 module_init(ak4535_modinit); 685 686 static void __exit ak4535_exit(void) 687 { 688 snd_soc_unregister_dai(&ak4535_dai); 689 } 690 module_exit(ak4535_exit); 691 692 MODULE_DESCRIPTION("Soc AK4535 driver"); 693 MODULE_AUTHOR("Richard Purdie"); 694 MODULE_LICENSE("GPL"); 695