1/* 2 * wm8731.c -- WM8731 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/driver.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 "wm8731.h" 31 32#define AUDIO_NAME "wm8731" 33#define WM8731_VERSION "0.13" 34 35/* 36 * Debug 37 */ 38 39#define WM8731_DEBUG 0 40 41#ifdef WM8731_DEBUG 42#define dbg(format, arg...) \ 43 printk(KERN_DEBUG AUDIO_NAME ": " format "\n" , ## arg) 44#else 45#define dbg(format, arg...) do {} while (0) 46#endif 47#define err(format, arg...) \ 48 printk(KERN_ERR AUDIO_NAME ": " format "\n" , ## arg) 49#define info(format, arg...) \ 50 printk(KERN_INFO AUDIO_NAME ": " format "\n" , ## arg) 51#define warn(format, arg...) \ 52 printk(KERN_WARNING AUDIO_NAME ": " format "\n" , ## arg) 53 54struct snd_soc_codec_device soc_codec_dev_wm8731; 55 56/* codec private data */ 57struct wm8731_priv { 58 unsigned int sysclk; 59}; 60 61/* 62 * wm8731 register cache 63 * We can't read the WM8731 register space when we are 64 * using 2 wire for device control, so we cache them instead. 65 * There is no point in caching the reset register 66 */ 67static const u16 wm8731_reg[WM8731_CACHEREGNUM] = { 68 0x0097, 0x0097, 0x0079, 0x0079, 69 0x000a, 0x0008, 0x009f, 0x000a, 70 0x0000, 0x0000 71}; 72 73/* 74 * read wm8731 register cache 75 */ 76static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec *codec, 77 unsigned int reg) 78{ 79 u16 *cache = codec->reg_cache; 80 if (reg == WM8731_RESET) 81 return 0; 82 if (reg >= WM8731_CACHEREGNUM) 83 return -1; 84 return cache[reg]; 85} 86 87/* 88 * write wm8731 register cache 89 */ 90static inline void wm8731_write_reg_cache(struct snd_soc_codec *codec, 91 u16 reg, unsigned int value) 92{ 93 u16 *cache = codec->reg_cache; 94 if (reg >= WM8731_CACHEREGNUM) 95 return; 96 cache[reg] = value; 97} 98 99/* 100 * write to the WM8731 register space 101 */ 102static int wm8731_write(struct snd_soc_codec *codec, unsigned int reg, 103 unsigned int value) 104{ 105 u8 data[2]; 106 107 /* data is 108 * D15..D9 WM8731 register offset 109 * D8...D0 register data 110 */ 111 data[0] = (reg << 1) | ((value >> 8) & 0x0001); 112 data[1] = value & 0x00ff; 113 114 wm8731_write_reg_cache (codec, reg, value); 115 if (codec->hw_write(codec->control_data, data, 2) == 2) 116 return 0; 117 else 118 return -EIO; 119} 120 121#define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0) 122 123static const char *wm8731_input_select[] = {"Line In", "Mic"}; 124static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"}; 125 126static const struct soc_enum wm8731_enum[] = { 127 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select), 128 SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph), 129}; 130 131static const struct snd_kcontrol_new wm8731_snd_controls[] = { 132 133SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 134 0, 127, 0), 135SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 136 7, 1, 0), 137 138SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0), 139SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 140 141SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0), 142SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1), 143 144SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1), 145 146SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 147SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 148 149SOC_ENUM("Playback De-emphasis", wm8731_enum[1]), 150}; 151 152/* add non dapm controls */ 153static int wm8731_add_controls(struct snd_soc_codec *codec) 154{ 155 int err, i; 156 157 for (i = 0; i < ARRAY_SIZE(wm8731_snd_controls); i++) { 158 if ((err = snd_ctl_add(codec->card, 159 snd_soc_cnew(&wm8731_snd_controls[i],codec, NULL))) < 0) 160 return err; 161 } 162 163 return 0; 164} 165 166/* Output Mixer */ 167static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 168SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 169SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 170SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 171}; 172 173/* Input mux */ 174static const struct snd_kcontrol_new wm8731_input_mux_controls = 175SOC_DAPM_ENUM("Input Select", wm8731_enum[0]); 176 177static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 178SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 179 &wm8731_output_mixer_controls[0], 180 ARRAY_SIZE(wm8731_output_mixer_controls)), 181SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 182SND_SOC_DAPM_OUTPUT("LOUT"), 183SND_SOC_DAPM_OUTPUT("LHPOUT"), 184SND_SOC_DAPM_OUTPUT("ROUT"), 185SND_SOC_DAPM_OUTPUT("RHPOUT"), 186SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 187SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 188SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 189SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 190SND_SOC_DAPM_INPUT("MICIN"), 191SND_SOC_DAPM_INPUT("RLINEIN"), 192SND_SOC_DAPM_INPUT("LLINEIN"), 193}; 194 195static const char *intercon[][3] = { 196 /* output mixer */ 197 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 198 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 199 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 200 201 /* outputs */ 202 {"RHPOUT", NULL, "Output Mixer"}, 203 {"ROUT", NULL, "Output Mixer"}, 204 {"LHPOUT", NULL, "Output Mixer"}, 205 {"LOUT", NULL, "Output Mixer"}, 206 207 /* input mux */ 208 {"Input Mux", "Line In", "Line Input"}, 209 {"Input Mux", "Mic", "Mic Bias"}, 210 {"ADC", NULL, "Input Mux"}, 211 212 /* inputs */ 213 {"Line Input", NULL, "LLINEIN"}, 214 {"Line Input", NULL, "RLINEIN"}, 215 {"Mic Bias", NULL, "MICIN"}, 216 217 /* terminator */ 218 {NULL, NULL, NULL}, 219}; 220 221static int wm8731_add_widgets(struct snd_soc_codec *codec) 222{ 223 int i; 224 225 for(i = 0; i < ARRAY_SIZE(wm8731_dapm_widgets); i++) { 226 snd_soc_dapm_new_control(codec, &wm8731_dapm_widgets[i]); 227 } 228 229 /* set up audio path interconnects */ 230 for(i = 0; intercon[i][0] != NULL; i++) { 231 snd_soc_dapm_connect_input(codec, intercon[i][0], 232 intercon[i][1], intercon[i][2]); 233 } 234 235 snd_soc_dapm_new_widgets(codec); 236 return 0; 237} 238 239struct _coeff_div { 240 u32 mclk; 241 u32 rate; 242 u16 fs; 243 u8 sr:4; 244 u8 bosr:1; 245 u8 usb:1; 246}; 247 248/* codec mclk clock divider coefficients */ 249static const struct _coeff_div coeff_div[] = { 250 /* 48k */ 251 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 252 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 253 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 254 255 /* 32k */ 256 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 257 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 258 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 259 260 /* 8k */ 261 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 262 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 263 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 264 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 265 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 266 267 /* 96k */ 268 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 269 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 270 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 271 272 /* 44.1k */ 273 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 274 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 275 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 276 277 /* 88.2k */ 278 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 279 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 280 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 281}; 282 283static inline int get_coeff(int mclk, int rate) 284{ 285 int i; 286 287 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 288 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 289 return i; 290 } 291 return 0; 292} 293 294static int wm8731_hw_params(struct snd_pcm_substream *substream, 295 struct snd_pcm_hw_params *params) 296{ 297 struct snd_soc_pcm_runtime *rtd = substream->private_data; 298 struct snd_soc_device *socdev = rtd->socdev; 299 struct snd_soc_codec *codec = socdev->codec; 300 struct wm8731_priv *wm8731 = codec->private_data; 301 u16 iface = wm8731_read_reg_cache(codec, WM8731_IFACE) & 0xfff3; 302 int i = get_coeff(wm8731->sysclk, params_rate(params)); 303 u16 srate = (coeff_div[i].sr << 2) | 304 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 305 306 wm8731_write(codec, WM8731_SRATE, srate); 307 308 /* bit size */ 309 switch (params_format(params)) { 310 case SNDRV_PCM_FORMAT_S16_LE: 311 break; 312 case SNDRV_PCM_FORMAT_S20_3LE: 313 iface |= 0x0004; 314 break; 315 case SNDRV_PCM_FORMAT_S24_LE: 316 iface |= 0x0008; 317 break; 318 } 319 320 wm8731_write(codec, WM8731_IFACE, iface); 321 return 0; 322} 323 324static int wm8731_pcm_prepare(struct snd_pcm_substream *substream) 325{ 326 struct snd_soc_pcm_runtime *rtd = substream->private_data; 327 struct snd_soc_device *socdev = rtd->socdev; 328 struct snd_soc_codec *codec = socdev->codec; 329 330 /* set active */ 331 wm8731_write(codec, WM8731_ACTIVE, 0x0001); 332 333 return 0; 334} 335 336static void wm8731_shutdown(struct snd_pcm_substream *substream) 337{ 338 struct snd_soc_pcm_runtime *rtd = substream->private_data; 339 struct snd_soc_device *socdev = rtd->socdev; 340 struct snd_soc_codec *codec = socdev->codec; 341 342 /* deactivate */ 343 if (!codec->active) { 344 udelay(50); 345 wm8731_write(codec, WM8731_ACTIVE, 0x0); 346 } 347} 348 349static int wm8731_mute(struct snd_soc_codec_dai *dai, int mute) 350{ 351 struct snd_soc_codec *codec = dai->codec; 352 u16 mute_reg = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7; 353 354 if (mute) 355 wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8); 356 else 357 wm8731_write(codec, WM8731_APDIGI, mute_reg); 358 return 0; 359} 360 361static int wm8731_set_dai_sysclk(struct snd_soc_codec_dai *codec_dai, 362 int clk_id, unsigned int freq, int dir) 363{ 364 struct snd_soc_codec *codec = codec_dai->codec; 365 struct wm8731_priv *wm8731 = codec->private_data; 366 367 switch (freq) { 368 case 11289600: 369 case 12000000: 370 case 12288000: 371 case 16934400: 372 case 18432000: 373 wm8731->sysclk = freq; 374 return 0; 375 } 376 return -EINVAL; 377} 378 379 380static int wm8731_set_dai_fmt(struct snd_soc_codec_dai *codec_dai, 381 unsigned int fmt) 382{ 383 struct snd_soc_codec *codec = codec_dai->codec; 384 u16 iface = 0; 385 386 /* set master/slave audio interface */ 387 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 388 case SND_SOC_DAIFMT_CBM_CFM: 389 iface |= 0x0040; 390 break; 391 case SND_SOC_DAIFMT_CBS_CFS: 392 break; 393 default: 394 return -EINVAL; 395 } 396 397 /* interface format */ 398 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 399 case SND_SOC_DAIFMT_I2S: 400 iface |= 0x0002; 401 break; 402 case SND_SOC_DAIFMT_RIGHT_J: 403 break; 404 case SND_SOC_DAIFMT_LEFT_J: 405 iface |= 0x0001; 406 break; 407 case SND_SOC_DAIFMT_DSP_A: 408 iface |= 0x0003; 409 break; 410 case SND_SOC_DAIFMT_DSP_B: 411 iface |= 0x0013; 412 break; 413 default: 414 return -EINVAL; 415 } 416 417 /* clock inversion */ 418 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 419 case SND_SOC_DAIFMT_NB_NF: 420 break; 421 case SND_SOC_DAIFMT_IB_IF: 422 iface |= 0x0090; 423 break; 424 case SND_SOC_DAIFMT_IB_NF: 425 iface |= 0x0080; 426 break; 427 case SND_SOC_DAIFMT_NB_IF: 428 iface |= 0x0010; 429 break; 430 default: 431 return -EINVAL; 432 } 433 434 /* set iface */ 435 wm8731_write(codec, WM8731_IFACE, iface); 436 return 0; 437} 438 439static int wm8731_dapm_event(struct snd_soc_codec *codec, int event) 440{ 441 u16 reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f; 442 443 switch (event) { 444 case SNDRV_CTL_POWER_D0: /* full On */ 445 /* vref/mid, osc on, dac unmute */ 446 wm8731_write(codec, WM8731_PWR, reg); 447 break; 448 case SNDRV_CTL_POWER_D1: /* partial On */ 449 case SNDRV_CTL_POWER_D2: /* partial On */ 450 break; 451 case SNDRV_CTL_POWER_D3hot: /* Off, with power */ 452 /* everything off except vref/vmid, */ 453 wm8731_write(codec, WM8731_PWR, reg | 0x0040); 454 break; 455 case SNDRV_CTL_POWER_D3cold: /* Off, without power */ 456 /* everything off, dac mute, inactive */ 457 wm8731_write(codec, WM8731_ACTIVE, 0x0); 458 wm8731_write(codec, WM8731_PWR, 0xffff); 459 break; 460 } 461 codec->dapm_state = event; 462 return 0; 463} 464 465#define WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 466 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ 467 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ 468 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ 469 SNDRV_PCM_RATE_96000) 470 471#define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 472 SNDRV_PCM_FMTBIT_S24_LE) 473 474struct snd_soc_codec_dai wm8731_dai = { 475 .name = "WM8731", 476 .playback = { 477 .stream_name = "Playback", 478 .channels_min = 1, 479 .channels_max = 2, 480 .rates = WM8731_RATES, 481 .formats = WM8731_FORMATS,}, 482 .capture = { 483 .stream_name = "Capture", 484 .channels_min = 1, 485 .channels_max = 2, 486 .rates = WM8731_RATES, 487 .formats = WM8731_FORMATS,}, 488 .ops = { 489 .prepare = wm8731_pcm_prepare, 490 .hw_params = wm8731_hw_params, 491 .shutdown = wm8731_shutdown, 492 }, 493 .dai_ops = { 494 .digital_mute = wm8731_mute, 495 .set_sysclk = wm8731_set_dai_sysclk, 496 .set_fmt = wm8731_set_dai_fmt, 497 } 498}; 499EXPORT_SYMBOL_GPL(wm8731_dai); 500 501static int wm8731_suspend(struct platform_device *pdev, pm_message_t state) 502{ 503 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 504 struct snd_soc_codec *codec = socdev->codec; 505 506 wm8731_write(codec, WM8731_ACTIVE, 0x0); 507 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold); 508 return 0; 509} 510 511static int wm8731_resume(struct platform_device *pdev) 512{ 513 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 514 struct snd_soc_codec *codec = socdev->codec; 515 int i; 516 u8 data[2]; 517 u16 *cache = codec->reg_cache; 518 519 /* Sync reg_cache with the hardware */ 520 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) { 521 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 522 data[1] = cache[i] & 0x00ff; 523 codec->hw_write(codec->control_data, data, 2); 524 } 525 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot); 526 wm8731_dapm_event(codec, codec->suspend_dapm_state); 527 return 0; 528} 529 530/* 531 * initialise the WM8731 driver 532 * register the mixer and dsp interfaces with the kernel 533 */ 534static int wm8731_init(struct snd_soc_device *socdev) 535{ 536 struct snd_soc_codec *codec = socdev->codec; 537 int reg, ret = 0; 538 539 codec->name = "WM8731"; 540 codec->owner = THIS_MODULE; 541 codec->read = wm8731_read_reg_cache; 542 codec->write = wm8731_write; 543 codec->dapm_event = wm8731_dapm_event; 544 codec->dai = &wm8731_dai; 545 codec->num_dai = 1; 546 codec->reg_cache_size = sizeof(wm8731_reg); 547 codec->reg_cache = kmemdup(wm8731_reg, sizeof(wm8731_reg), GFP_KERNEL); 548 if (codec->reg_cache == NULL) 549 return -ENOMEM; 550 551 wm8731_reset(codec); 552 553 /* register pcms */ 554 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 555 if (ret < 0) { 556 printk(KERN_ERR "wm8731: failed to create pcms\n"); 557 goto pcm_err; 558 } 559 560 /* power on device */ 561 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot); 562 563 /* set the update bits */ 564 reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V); 565 wm8731_write(codec, WM8731_LOUT1V, reg | 0x0100); 566 reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V); 567 wm8731_write(codec, WM8731_ROUT1V, reg | 0x0100); 568 reg = wm8731_read_reg_cache(codec, WM8731_LINVOL); 569 wm8731_write(codec, WM8731_LINVOL, reg | 0x0100); 570 reg = wm8731_read_reg_cache(codec, WM8731_RINVOL); 571 wm8731_write(codec, WM8731_RINVOL, reg | 0x0100); 572 573 wm8731_add_controls(codec); 574 wm8731_add_widgets(codec); 575 ret = snd_soc_register_card(socdev); 576 if (ret < 0) { 577 printk(KERN_ERR "wm8731: failed to register card\n"); 578 goto card_err; 579 } 580 581 return ret; 582 583card_err: 584 snd_soc_free_pcms(socdev); 585 snd_soc_dapm_free(socdev); 586pcm_err: 587 kfree(codec->reg_cache); 588 return ret; 589} 590 591static struct snd_soc_device *wm8731_socdev; 592 593#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 594 595/* 596 * WM8731 2 wire address is determined by GPIO5 597 * state during powerup. 598 * low = 0x1a 599 * high = 0x1b 600 */ 601static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END }; 602 603/* Magic definition of all other variables and things */ 604I2C_CLIENT_INSMOD; 605 606static struct i2c_driver wm8731_i2c_driver; 607static struct i2c_client client_template; 608 609/* If the i2c layer weren't so broken, we could pass this kind of data 610 around */ 611 612static int wm8731_codec_probe(struct i2c_adapter *adap, int addr, int kind) 613{ 614 struct snd_soc_device *socdev = wm8731_socdev; 615 struct wm8731_setup_data *setup = socdev->codec_data; 616 struct snd_soc_codec *codec = socdev->codec; 617 struct i2c_client *i2c; 618 int ret; 619 620 if (addr != setup->i2c_address) 621 return -ENODEV; 622 623 client_template.adapter = adap; 624 client_template.addr = addr; 625 626 i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL); 627 if (i2c == NULL) { 628 kfree(codec); 629 return -ENOMEM; 630 } 631 i2c_set_clientdata(i2c, codec); 632 codec->control_data = i2c; 633 634 ret = i2c_attach_client(i2c); 635 if (ret < 0) { 636 err("failed to attach codec at addr %x\n", addr); 637 goto err; 638 } 639 640 ret = wm8731_init(socdev); 641 if (ret < 0) { 642 err("failed to initialise WM8731\n"); 643 goto err; 644 } 645 return ret; 646 647err: 648 kfree(codec); 649 kfree(i2c); 650 return ret; 651} 652 653static int wm8731_i2c_detach(struct i2c_client *client) 654{ 655 struct snd_soc_codec* codec = i2c_get_clientdata(client); 656 i2c_detach_client(client); 657 kfree(codec->reg_cache); 658 kfree(client); 659 return 0; 660} 661 662static int wm8731_i2c_attach(struct i2c_adapter *adap) 663{ 664 return i2c_probe(adap, &addr_data, wm8731_codec_probe); 665} 666 667/* corgi i2c codec control layer */ 668static struct i2c_driver wm8731_i2c_driver = { 669 .driver = { 670 .name = "WM8731 I2C Codec", 671 .owner = THIS_MODULE, 672 }, 673 .id = I2C_DRIVERID_WM8731, 674 .attach_adapter = wm8731_i2c_attach, 675 .detach_client = wm8731_i2c_detach, 676 .command = NULL, 677}; 678 679static struct i2c_client client_template = { 680 .name = "WM8731", 681 .driver = &wm8731_i2c_driver, 682}; 683#endif 684 685static int wm8731_probe(struct platform_device *pdev) 686{ 687 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 688 struct wm8731_setup_data *setup; 689 struct snd_soc_codec *codec; 690 struct wm8731_priv *wm8731; 691 int ret = 0; 692 693 info("WM8731 Audio Codec %s", WM8731_VERSION); 694 695 setup = socdev->codec_data; 696 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 697 if (codec == NULL) 698 return -ENOMEM; 699 700 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 701 if (wm8731 == NULL) { 702 kfree(codec); 703 return -ENOMEM; 704 } 705 706 codec->private_data = wm8731; 707 socdev->codec = codec; 708 mutex_init(&codec->mutex); 709 INIT_LIST_HEAD(&codec->dapm_widgets); 710 INIT_LIST_HEAD(&codec->dapm_paths); 711 712 wm8731_socdev = socdev; 713#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 714 if (setup->i2c_address) { 715 normal_i2c[0] = setup->i2c_address; 716 codec->hw_write = (hw_write_t)i2c_master_send; 717 ret = i2c_add_driver(&wm8731_i2c_driver); 718 if (ret != 0) 719 printk(KERN_ERR "can't add i2c driver"); 720 } 721#else 722 /* Add other interfaces here */ 723#endif 724 return ret; 725} 726 727/* power down chip */ 728static int wm8731_remove(struct platform_device *pdev) 729{ 730 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 731 struct snd_soc_codec *codec = socdev->codec; 732 733 if (codec->control_data) 734 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold); 735 736 snd_soc_free_pcms(socdev); 737 snd_soc_dapm_free(socdev); 738#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 739 i2c_del_driver(&wm8731_i2c_driver); 740#endif 741 kfree(codec->private_data); 742 kfree(codec); 743 744 return 0; 745} 746 747struct snd_soc_codec_device soc_codec_dev_wm8731 = { 748 .probe = wm8731_probe, 749 .remove = wm8731_remove, 750 .suspend = wm8731_suspend, 751 .resume = wm8731_resume, 752}; 753 754EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731); 755 756MODULE_DESCRIPTION("ASoC WM8731 driver"); 757MODULE_AUTHOR("Richard Purdie"); 758MODULE_LICENSE("GPL"); 759