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/slab.h> 22 #include <linux/platform_device.h> 23 #include <linux/regulator/consumer.h> 24 #include <linux/spi/spi.h> 25 #include <sound/core.h> 26 #include <sound/pcm.h> 27 #include <sound/pcm_params.h> 28 #include <sound/soc.h> 29 #include <sound/soc-dapm.h> 30 #include <sound/initval.h> 31 #include <sound/tlv.h> 32 33 #include "wm8731.h" 34 35 static struct snd_soc_codec *wm8731_codec; 36 struct snd_soc_codec_device soc_codec_dev_wm8731; 37 38 #define WM8731_NUM_SUPPLIES 4 39 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = { 40 "AVDD", 41 "HPVDD", 42 "DCVDD", 43 "DBVDD", 44 }; 45 46 /* codec private data */ 47 struct wm8731_priv { 48 struct snd_soc_codec codec; 49 struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES]; 50 u16 reg_cache[WM8731_CACHEREGNUM]; 51 unsigned int sysclk; 52 }; 53 54 55 /* 56 * wm8731 register cache 57 * We can't read the WM8731 register space when we are 58 * using 2 wire for device control, so we cache them instead. 59 * There is no point in caching the reset register 60 */ 61 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = { 62 0x0097, 0x0097, 0x0079, 0x0079, 63 0x000a, 0x0008, 0x009f, 0x000a, 64 0x0000, 0x0000 65 }; 66 67 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0) 68 69 static const char *wm8731_input_select[] = {"Line In", "Mic"}; 70 static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"}; 71 72 static const struct soc_enum wm8731_enum[] = { 73 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select), 74 SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph), 75 }; 76 77 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 78 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 79 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 80 81 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 82 83 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 84 0, 127, 0, out_tlv), 85 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 86 7, 1, 0), 87 88 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 89 in_tlv), 90 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 91 92 SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0), 93 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 94 95 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 96 sidetone_tlv), 97 98 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 99 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 100 101 SOC_ENUM("Playback De-emphasis", wm8731_enum[1]), 102 }; 103 104 /* Output Mixer */ 105 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 106 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 107 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 108 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 109 }; 110 111 /* Input mux */ 112 static const struct snd_kcontrol_new wm8731_input_mux_controls = 113 SOC_DAPM_ENUM("Input Select", wm8731_enum[0]); 114 115 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 116 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 117 &wm8731_output_mixer_controls[0], 118 ARRAY_SIZE(wm8731_output_mixer_controls)), 119 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 120 SND_SOC_DAPM_OUTPUT("LOUT"), 121 SND_SOC_DAPM_OUTPUT("LHPOUT"), 122 SND_SOC_DAPM_OUTPUT("ROUT"), 123 SND_SOC_DAPM_OUTPUT("RHPOUT"), 124 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 125 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 126 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 127 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 128 SND_SOC_DAPM_INPUT("MICIN"), 129 SND_SOC_DAPM_INPUT("RLINEIN"), 130 SND_SOC_DAPM_INPUT("LLINEIN"), 131 }; 132 133 static const struct snd_soc_dapm_route intercon[] = { 134 /* output mixer */ 135 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 136 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 137 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 138 139 /* outputs */ 140 {"RHPOUT", NULL, "Output Mixer"}, 141 {"ROUT", NULL, "Output Mixer"}, 142 {"LHPOUT", NULL, "Output Mixer"}, 143 {"LOUT", NULL, "Output Mixer"}, 144 145 /* input mux */ 146 {"Input Mux", "Line In", "Line Input"}, 147 {"Input Mux", "Mic", "Mic Bias"}, 148 {"ADC", NULL, "Input Mux"}, 149 150 /* inputs */ 151 {"Line Input", NULL, "LLINEIN"}, 152 {"Line Input", NULL, "RLINEIN"}, 153 {"Mic Bias", NULL, "MICIN"}, 154 }; 155 156 static int wm8731_add_widgets(struct snd_soc_codec *codec) 157 { 158 snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets, 159 ARRAY_SIZE(wm8731_dapm_widgets)); 160 161 snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); 162 163 return 0; 164 } 165 166 struct _coeff_div { 167 u32 mclk; 168 u32 rate; 169 u16 fs; 170 u8 sr:4; 171 u8 bosr:1; 172 u8 usb:1; 173 }; 174 175 /* codec mclk clock divider coefficients */ 176 static const struct _coeff_div coeff_div[] = { 177 /* 48k */ 178 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 179 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 180 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 181 182 /* 32k */ 183 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 184 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 185 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 186 187 /* 8k */ 188 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 189 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 190 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 191 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 192 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 193 194 /* 96k */ 195 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 196 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 197 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 198 199 /* 44.1k */ 200 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 201 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 202 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 203 204 /* 88.2k */ 205 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 206 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 207 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 208 }; 209 210 static inline int get_coeff(int mclk, int rate) 211 { 212 int i; 213 214 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 215 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 216 return i; 217 } 218 return 0; 219 } 220 221 static int wm8731_hw_params(struct snd_pcm_substream *substream, 222 struct snd_pcm_hw_params *params, 223 struct snd_soc_dai *dai) 224 { 225 struct snd_soc_pcm_runtime *rtd = substream->private_data; 226 struct snd_soc_device *socdev = rtd->socdev; 227 struct snd_soc_codec *codec = socdev->card->codec; 228 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 229 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 230 int i = get_coeff(wm8731->sysclk, params_rate(params)); 231 u16 srate = (coeff_div[i].sr << 2) | 232 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 233 234 snd_soc_write(codec, WM8731_SRATE, srate); 235 236 /* bit size */ 237 switch (params_format(params)) { 238 case SNDRV_PCM_FORMAT_S16_LE: 239 break; 240 case SNDRV_PCM_FORMAT_S20_3LE: 241 iface |= 0x0004; 242 break; 243 case SNDRV_PCM_FORMAT_S24_LE: 244 iface |= 0x0008; 245 break; 246 } 247 248 snd_soc_write(codec, WM8731_IFACE, iface); 249 return 0; 250 } 251 252 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream, 253 struct snd_soc_dai *dai) 254 { 255 struct snd_soc_pcm_runtime *rtd = substream->private_data; 256 struct snd_soc_device *socdev = rtd->socdev; 257 struct snd_soc_codec *codec = socdev->card->codec; 258 259 /* set active */ 260 snd_soc_write(codec, WM8731_ACTIVE, 0x0001); 261 262 return 0; 263 } 264 265 static void wm8731_shutdown(struct snd_pcm_substream *substream, 266 struct snd_soc_dai *dai) 267 { 268 struct snd_soc_pcm_runtime *rtd = substream->private_data; 269 struct snd_soc_device *socdev = rtd->socdev; 270 struct snd_soc_codec *codec = socdev->card->codec; 271 272 /* deactivate */ 273 if (!codec->active) { 274 udelay(50); 275 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 276 } 277 } 278 279 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 280 { 281 struct snd_soc_codec *codec = dai->codec; 282 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 283 284 if (mute) 285 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 286 else 287 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 288 return 0; 289 } 290 291 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 292 int clk_id, unsigned int freq, int dir) 293 { 294 struct snd_soc_codec *codec = codec_dai->codec; 295 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 296 297 switch (freq) { 298 case 11289600: 299 case 12000000: 300 case 12288000: 301 case 16934400: 302 case 18432000: 303 wm8731->sysclk = freq; 304 return 0; 305 } 306 return -EINVAL; 307 } 308 309 310 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 311 unsigned int fmt) 312 { 313 struct snd_soc_codec *codec = codec_dai->codec; 314 u16 iface = 0; 315 316 /* set master/slave audio interface */ 317 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 318 case SND_SOC_DAIFMT_CBM_CFM: 319 iface |= 0x0040; 320 break; 321 case SND_SOC_DAIFMT_CBS_CFS: 322 break; 323 default: 324 return -EINVAL; 325 } 326 327 /* interface format */ 328 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 329 case SND_SOC_DAIFMT_I2S: 330 iface |= 0x0002; 331 break; 332 case SND_SOC_DAIFMT_RIGHT_J: 333 break; 334 case SND_SOC_DAIFMT_LEFT_J: 335 iface |= 0x0001; 336 break; 337 case SND_SOC_DAIFMT_DSP_A: 338 iface |= 0x0003; 339 break; 340 case SND_SOC_DAIFMT_DSP_B: 341 iface |= 0x0013; 342 break; 343 default: 344 return -EINVAL; 345 } 346 347 /* clock inversion */ 348 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 349 case SND_SOC_DAIFMT_NB_NF: 350 break; 351 case SND_SOC_DAIFMT_IB_IF: 352 iface |= 0x0090; 353 break; 354 case SND_SOC_DAIFMT_IB_NF: 355 iface |= 0x0080; 356 break; 357 case SND_SOC_DAIFMT_NB_IF: 358 iface |= 0x0010; 359 break; 360 default: 361 return -EINVAL; 362 } 363 364 /* set iface */ 365 snd_soc_write(codec, WM8731_IFACE, iface); 366 return 0; 367 } 368 369 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 370 enum snd_soc_bias_level level) 371 { 372 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 373 int i, ret; 374 u8 data[2]; 375 u16 *cache = codec->reg_cache; 376 u16 reg; 377 378 switch (level) { 379 case SND_SOC_BIAS_ON: 380 break; 381 case SND_SOC_BIAS_PREPARE: 382 break; 383 case SND_SOC_BIAS_STANDBY: 384 if (codec->bias_level == SND_SOC_BIAS_OFF) { 385 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 386 wm8731->supplies); 387 if (ret != 0) 388 return ret; 389 390 /* Sync reg_cache with the hardware */ 391 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) { 392 if (cache[i] == wm8731_reg[i]) 393 continue; 394 395 data[0] = (i << 1) | ((cache[i] >> 8) 396 & 0x0001); 397 data[1] = cache[i] & 0x00ff; 398 codec->hw_write(codec->control_data, data, 2); 399 } 400 } 401 402 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 403 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 404 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 405 break; 406 case SND_SOC_BIAS_OFF: 407 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 408 snd_soc_write(codec, WM8731_PWR, 0xffff); 409 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 410 wm8731->supplies); 411 break; 412 } 413 codec->bias_level = level; 414 return 0; 415 } 416 417 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 418 419 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 420 SNDRV_PCM_FMTBIT_S24_LE) 421 422 static struct snd_soc_dai_ops wm8731_dai_ops = { 423 .prepare = wm8731_pcm_prepare, 424 .hw_params = wm8731_hw_params, 425 .shutdown = wm8731_shutdown, 426 .digital_mute = wm8731_mute, 427 .set_sysclk = wm8731_set_dai_sysclk, 428 .set_fmt = wm8731_set_dai_fmt, 429 }; 430 431 struct snd_soc_dai wm8731_dai = { 432 .name = "WM8731", 433 .playback = { 434 .stream_name = "Playback", 435 .channels_min = 1, 436 .channels_max = 2, 437 .rates = WM8731_RATES, 438 .formats = WM8731_FORMATS,}, 439 .capture = { 440 .stream_name = "Capture", 441 .channels_min = 1, 442 .channels_max = 2, 443 .rates = WM8731_RATES, 444 .formats = WM8731_FORMATS,}, 445 .ops = &wm8731_dai_ops, 446 .symmetric_rates = 1, 447 }; 448 EXPORT_SYMBOL_GPL(wm8731_dai); 449 450 #ifdef CONFIG_PM 451 static int wm8731_suspend(struct platform_device *pdev, pm_message_t state) 452 { 453 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 454 struct snd_soc_codec *codec = socdev->card->codec; 455 456 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 457 458 return 0; 459 } 460 461 static int wm8731_resume(struct platform_device *pdev) 462 { 463 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 464 struct snd_soc_codec *codec = socdev->card->codec; 465 466 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 467 468 return 0; 469 } 470 #else 471 #define wm8731_suspend NULL 472 #define wm8731_resume NULL 473 #endif 474 475 static int wm8731_probe(struct platform_device *pdev) 476 { 477 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 478 struct snd_soc_codec *codec; 479 int ret = 0; 480 481 if (wm8731_codec == NULL) { 482 dev_err(&pdev->dev, "Codec device not registered\n"); 483 return -ENODEV; 484 } 485 486 socdev->card->codec = wm8731_codec; 487 codec = wm8731_codec; 488 489 /* register pcms */ 490 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 491 if (ret < 0) { 492 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 493 goto pcm_err; 494 } 495 496 snd_soc_add_controls(codec, wm8731_snd_controls, 497 ARRAY_SIZE(wm8731_snd_controls)); 498 wm8731_add_widgets(codec); 499 500 return ret; 501 502 pcm_err: 503 return ret; 504 } 505 506 /* power down chip */ 507 static int wm8731_remove(struct platform_device *pdev) 508 { 509 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 510 511 snd_soc_free_pcms(socdev); 512 snd_soc_dapm_free(socdev); 513 514 return 0; 515 } 516 517 struct snd_soc_codec_device soc_codec_dev_wm8731 = { 518 .probe = wm8731_probe, 519 .remove = wm8731_remove, 520 .suspend = wm8731_suspend, 521 .resume = wm8731_resume, 522 }; 523 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731); 524 525 static int wm8731_register(struct wm8731_priv *wm8731, 526 enum snd_soc_control_type control) 527 { 528 int ret, i; 529 struct snd_soc_codec *codec = &wm8731->codec; 530 531 if (wm8731_codec) { 532 dev_err(codec->dev, "Another WM8731 is registered\n"); 533 ret = -EINVAL; 534 goto err; 535 } 536 537 mutex_init(&codec->mutex); 538 INIT_LIST_HEAD(&codec->dapm_widgets); 539 INIT_LIST_HEAD(&codec->dapm_paths); 540 541 snd_soc_codec_set_drvdata(codec, wm8731); 542 codec->name = "WM8731"; 543 codec->owner = THIS_MODULE; 544 codec->bias_level = SND_SOC_BIAS_OFF; 545 codec->set_bias_level = wm8731_set_bias_level; 546 codec->dai = &wm8731_dai; 547 codec->num_dai = 1; 548 codec->reg_cache_size = WM8731_CACHEREGNUM; 549 codec->reg_cache = &wm8731->reg_cache; 550 551 memcpy(codec->reg_cache, wm8731_reg, sizeof(wm8731_reg)); 552 553 ret = snd_soc_codec_set_cache_io(codec, 7, 9, control); 554 if (ret < 0) { 555 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 556 goto err; 557 } 558 559 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 560 wm8731->supplies[i].supply = wm8731_supply_names[i]; 561 562 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 563 wm8731->supplies); 564 if (ret != 0) { 565 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 566 goto err; 567 } 568 569 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 570 wm8731->supplies); 571 if (ret != 0) { 572 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 573 goto err_regulator_get; 574 } 575 576 ret = wm8731_reset(codec); 577 if (ret < 0) { 578 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 579 goto err_regulator_enable; 580 } 581 582 wm8731_dai.dev = codec->dev; 583 584 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 585 586 /* Latch the update bits */ 587 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 588 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 589 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 590 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 591 592 /* Disable bypass path by default */ 593 snd_soc_update_bits(codec, WM8731_APANA, 0x4, 0); 594 595 wm8731_codec = codec; 596 597 ret = snd_soc_register_codec(codec); 598 if (ret != 0) { 599 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 600 goto err_regulator_enable; 601 } 602 603 ret = snd_soc_register_dai(&wm8731_dai); 604 if (ret != 0) { 605 dev_err(codec->dev, "Failed to register DAI: %d\n", ret); 606 snd_soc_unregister_codec(codec); 607 goto err_codec; 608 } 609 610 /* Regulators will have been enabled by bias management */ 611 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 612 613 return 0; 614 615 err_codec: 616 snd_soc_unregister_codec(codec); 617 err_regulator_enable: 618 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 619 err_regulator_get: 620 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 621 err: 622 kfree(wm8731); 623 return ret; 624 } 625 626 static void wm8731_unregister(struct wm8731_priv *wm8731) 627 { 628 wm8731_set_bias_level(&wm8731->codec, SND_SOC_BIAS_OFF); 629 snd_soc_unregister_dai(&wm8731_dai); 630 snd_soc_unregister_codec(&wm8731->codec); 631 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 632 kfree(wm8731); 633 wm8731_codec = NULL; 634 } 635 636 #if defined(CONFIG_SPI_MASTER) 637 static int __devinit wm8731_spi_probe(struct spi_device *spi) 638 { 639 struct snd_soc_codec *codec; 640 struct wm8731_priv *wm8731; 641 642 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 643 if (wm8731 == NULL) 644 return -ENOMEM; 645 646 codec = &wm8731->codec; 647 codec->control_data = spi; 648 codec->dev = &spi->dev; 649 650 dev_set_drvdata(&spi->dev, wm8731); 651 652 return wm8731_register(wm8731, SND_SOC_SPI); 653 } 654 655 static int __devexit wm8731_spi_remove(struct spi_device *spi) 656 { 657 struct wm8731_priv *wm8731 = dev_get_drvdata(&spi->dev); 658 659 wm8731_unregister(wm8731); 660 661 return 0; 662 } 663 664 static struct spi_driver wm8731_spi_driver = { 665 .driver = { 666 .name = "wm8731", 667 .bus = &spi_bus_type, 668 .owner = THIS_MODULE, 669 }, 670 .probe = wm8731_spi_probe, 671 .remove = __devexit_p(wm8731_spi_remove), 672 }; 673 #endif /* CONFIG_SPI_MASTER */ 674 675 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 676 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c, 677 const struct i2c_device_id *id) 678 { 679 struct wm8731_priv *wm8731; 680 struct snd_soc_codec *codec; 681 682 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 683 if (wm8731 == NULL) 684 return -ENOMEM; 685 686 codec = &wm8731->codec; 687 688 i2c_set_clientdata(i2c, wm8731); 689 codec->control_data = i2c; 690 691 codec->dev = &i2c->dev; 692 693 return wm8731_register(wm8731, SND_SOC_I2C); 694 } 695 696 static __devexit int wm8731_i2c_remove(struct i2c_client *client) 697 { 698 struct wm8731_priv *wm8731 = i2c_get_clientdata(client); 699 wm8731_unregister(wm8731); 700 return 0; 701 } 702 703 static const struct i2c_device_id wm8731_i2c_id[] = { 704 { "wm8731", 0 }, 705 { } 706 }; 707 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 708 709 static struct i2c_driver wm8731_i2c_driver = { 710 .driver = { 711 .name = "wm8731", 712 .owner = THIS_MODULE, 713 }, 714 .probe = wm8731_i2c_probe, 715 .remove = __devexit_p(wm8731_i2c_remove), 716 .id_table = wm8731_i2c_id, 717 }; 718 #endif 719 720 static int __init wm8731_modinit(void) 721 { 722 int ret; 723 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 724 ret = i2c_add_driver(&wm8731_i2c_driver); 725 if (ret != 0) { 726 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 727 ret); 728 } 729 #endif 730 #if defined(CONFIG_SPI_MASTER) 731 ret = spi_register_driver(&wm8731_spi_driver); 732 if (ret != 0) { 733 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 734 ret); 735 } 736 #endif 737 return 0; 738 } 739 module_init(wm8731_modinit); 740 741 static void __exit wm8731_exit(void) 742 { 743 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 744 i2c_del_driver(&wm8731_i2c_driver); 745 #endif 746 #if defined(CONFIG_SPI_MASTER) 747 spi_unregister_driver(&wm8731_spi_driver); 748 #endif 749 } 750 module_exit(wm8731_exit); 751 752 MODULE_DESCRIPTION("ASoC WM8731 driver"); 753 MODULE_AUTHOR("Richard Purdie"); 754 MODULE_LICENSE("GPL"); 755