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 <linux/regulator/consumer.h> 23 #include <linux/spi/spi.h> 24 #include <sound/core.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include <sound/soc.h> 28 #include <sound/soc-dapm.h> 29 #include <sound/initval.h> 30 #include <sound/tlv.h> 31 32 #include "wm8731.h" 33 34 static struct snd_soc_codec *wm8731_codec; 35 struct snd_soc_codec_device soc_codec_dev_wm8731; 36 37 #define WM8731_NUM_SUPPLIES 4 38 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = { 39 "AVDD", 40 "HPVDD", 41 "DCVDD", 42 "DBVDD", 43 }; 44 45 /* codec private data */ 46 struct wm8731_priv { 47 struct snd_soc_codec codec; 48 struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES]; 49 u16 reg_cache[WM8731_CACHEREGNUM]; 50 unsigned int sysclk; 51 }; 52 53 54 /* 55 * wm8731 register cache 56 * We can't read the WM8731 register space when we are 57 * using 2 wire for device control, so we cache them instead. 58 * There is no point in caching the reset register 59 */ 60 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = { 61 0x0097, 0x0097, 0x0079, 0x0079, 62 0x000a, 0x0008, 0x009f, 0x000a, 63 0x0000, 0x0000 64 }; 65 66 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0) 67 68 static const char *wm8731_input_select[] = {"Line In", "Mic"}; 69 static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"}; 70 71 static const struct soc_enum wm8731_enum[] = { 72 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select), 73 SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph), 74 }; 75 76 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 77 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 78 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 79 80 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 81 82 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 83 0, 127, 0, out_tlv), 84 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 85 7, 1, 0), 86 87 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 88 in_tlv), 89 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 90 91 SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0), 92 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 93 94 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 95 sidetone_tlv), 96 97 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 98 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 99 100 SOC_ENUM("Playback De-emphasis", wm8731_enum[1]), 101 }; 102 103 /* Output Mixer */ 104 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 105 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 106 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 107 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 108 }; 109 110 /* Input mux */ 111 static const struct snd_kcontrol_new wm8731_input_mux_controls = 112 SOC_DAPM_ENUM("Input Select", wm8731_enum[0]); 113 114 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 115 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 116 &wm8731_output_mixer_controls[0], 117 ARRAY_SIZE(wm8731_output_mixer_controls)), 118 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 119 SND_SOC_DAPM_OUTPUT("LOUT"), 120 SND_SOC_DAPM_OUTPUT("LHPOUT"), 121 SND_SOC_DAPM_OUTPUT("ROUT"), 122 SND_SOC_DAPM_OUTPUT("RHPOUT"), 123 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 124 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 125 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 126 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 127 SND_SOC_DAPM_INPUT("MICIN"), 128 SND_SOC_DAPM_INPUT("RLINEIN"), 129 SND_SOC_DAPM_INPUT("LLINEIN"), 130 }; 131 132 static const struct snd_soc_dapm_route intercon[] = { 133 /* output mixer */ 134 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 135 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 136 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 137 138 /* outputs */ 139 {"RHPOUT", NULL, "Output Mixer"}, 140 {"ROUT", NULL, "Output Mixer"}, 141 {"LHPOUT", NULL, "Output Mixer"}, 142 {"LOUT", NULL, "Output Mixer"}, 143 144 /* input mux */ 145 {"Input Mux", "Line In", "Line Input"}, 146 {"Input Mux", "Mic", "Mic Bias"}, 147 {"ADC", NULL, "Input Mux"}, 148 149 /* inputs */ 150 {"Line Input", NULL, "LLINEIN"}, 151 {"Line Input", NULL, "RLINEIN"}, 152 {"Mic Bias", NULL, "MICIN"}, 153 }; 154 155 static int wm8731_add_widgets(struct snd_soc_codec *codec) 156 { 157 snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets, 158 ARRAY_SIZE(wm8731_dapm_widgets)); 159 160 snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); 161 162 return 0; 163 } 164 165 struct _coeff_div { 166 u32 mclk; 167 u32 rate; 168 u16 fs; 169 u8 sr:4; 170 u8 bosr:1; 171 u8 usb:1; 172 }; 173 174 /* codec mclk clock divider coefficients */ 175 static const struct _coeff_div coeff_div[] = { 176 /* 48k */ 177 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 178 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 179 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 180 181 /* 32k */ 182 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 183 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 184 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 185 186 /* 8k */ 187 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 188 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 189 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 190 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 191 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 192 193 /* 96k */ 194 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 195 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 196 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 197 198 /* 44.1k */ 199 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 200 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 201 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 202 203 /* 88.2k */ 204 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 205 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 206 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 207 }; 208 209 static inline int get_coeff(int mclk, int rate) 210 { 211 int i; 212 213 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 214 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 215 return i; 216 } 217 return 0; 218 } 219 220 static int wm8731_hw_params(struct snd_pcm_substream *substream, 221 struct snd_pcm_hw_params *params, 222 struct snd_soc_dai *dai) 223 { 224 struct snd_soc_pcm_runtime *rtd = substream->private_data; 225 struct snd_soc_device *socdev = rtd->socdev; 226 struct snd_soc_codec *codec = socdev->card->codec; 227 struct wm8731_priv *wm8731 = codec->private_data; 228 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 229 int i = get_coeff(wm8731->sysclk, params_rate(params)); 230 u16 srate = (coeff_div[i].sr << 2) | 231 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 232 233 snd_soc_write(codec, WM8731_SRATE, srate); 234 235 /* bit size */ 236 switch (params_format(params)) { 237 case SNDRV_PCM_FORMAT_S16_LE: 238 break; 239 case SNDRV_PCM_FORMAT_S20_3LE: 240 iface |= 0x0004; 241 break; 242 case SNDRV_PCM_FORMAT_S24_LE: 243 iface |= 0x0008; 244 break; 245 } 246 247 snd_soc_write(codec, WM8731_IFACE, iface); 248 return 0; 249 } 250 251 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream, 252 struct snd_soc_dai *dai) 253 { 254 struct snd_soc_pcm_runtime *rtd = substream->private_data; 255 struct snd_soc_device *socdev = rtd->socdev; 256 struct snd_soc_codec *codec = socdev->card->codec; 257 258 /* set active */ 259 snd_soc_write(codec, WM8731_ACTIVE, 0x0001); 260 261 return 0; 262 } 263 264 static void wm8731_shutdown(struct snd_pcm_substream *substream, 265 struct snd_soc_dai *dai) 266 { 267 struct snd_soc_pcm_runtime *rtd = substream->private_data; 268 struct snd_soc_device *socdev = rtd->socdev; 269 struct snd_soc_codec *codec = socdev->card->codec; 270 271 /* deactivate */ 272 if (!codec->active) { 273 udelay(50); 274 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 275 } 276 } 277 278 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 279 { 280 struct snd_soc_codec *codec = dai->codec; 281 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 282 283 if (mute) 284 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 285 else 286 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 287 return 0; 288 } 289 290 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 291 int clk_id, unsigned int freq, int dir) 292 { 293 struct snd_soc_codec *codec = codec_dai->codec; 294 struct wm8731_priv *wm8731 = codec->private_data; 295 296 switch (freq) { 297 case 11289600: 298 case 12000000: 299 case 12288000: 300 case 16934400: 301 case 18432000: 302 wm8731->sysclk = freq; 303 return 0; 304 } 305 return -EINVAL; 306 } 307 308 309 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 310 unsigned int fmt) 311 { 312 struct snd_soc_codec *codec = codec_dai->codec; 313 u16 iface = 0; 314 315 /* set master/slave audio interface */ 316 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 317 case SND_SOC_DAIFMT_CBM_CFM: 318 iface |= 0x0040; 319 break; 320 case SND_SOC_DAIFMT_CBS_CFS: 321 break; 322 default: 323 return -EINVAL; 324 } 325 326 /* interface format */ 327 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 328 case SND_SOC_DAIFMT_I2S: 329 iface |= 0x0002; 330 break; 331 case SND_SOC_DAIFMT_RIGHT_J: 332 break; 333 case SND_SOC_DAIFMT_LEFT_J: 334 iface |= 0x0001; 335 break; 336 case SND_SOC_DAIFMT_DSP_A: 337 iface |= 0x0003; 338 break; 339 case SND_SOC_DAIFMT_DSP_B: 340 iface |= 0x0013; 341 break; 342 default: 343 return -EINVAL; 344 } 345 346 /* clock inversion */ 347 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 348 case SND_SOC_DAIFMT_NB_NF: 349 break; 350 case SND_SOC_DAIFMT_IB_IF: 351 iface |= 0x0090; 352 break; 353 case SND_SOC_DAIFMT_IB_NF: 354 iface |= 0x0080; 355 break; 356 case SND_SOC_DAIFMT_NB_IF: 357 iface |= 0x0010; 358 break; 359 default: 360 return -EINVAL; 361 } 362 363 /* set iface */ 364 snd_soc_write(codec, WM8731_IFACE, iface); 365 return 0; 366 } 367 368 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 369 enum snd_soc_bias_level level) 370 { 371 u16 reg; 372 373 switch (level) { 374 case SND_SOC_BIAS_ON: 375 break; 376 case SND_SOC_BIAS_PREPARE: 377 break; 378 case SND_SOC_BIAS_STANDBY: 379 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 380 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 381 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 382 break; 383 case SND_SOC_BIAS_OFF: 384 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 385 snd_soc_write(codec, WM8731_PWR, 0xffff); 386 break; 387 } 388 codec->bias_level = level; 389 return 0; 390 } 391 392 #define WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 393 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ 394 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ 395 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ 396 SNDRV_PCM_RATE_96000) 397 398 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 399 SNDRV_PCM_FMTBIT_S24_LE) 400 401 static struct snd_soc_dai_ops wm8731_dai_ops = { 402 .prepare = wm8731_pcm_prepare, 403 .hw_params = wm8731_hw_params, 404 .shutdown = wm8731_shutdown, 405 .digital_mute = wm8731_mute, 406 .set_sysclk = wm8731_set_dai_sysclk, 407 .set_fmt = wm8731_set_dai_fmt, 408 }; 409 410 struct snd_soc_dai wm8731_dai = { 411 .name = "WM8731", 412 .playback = { 413 .stream_name = "Playback", 414 .channels_min = 1, 415 .channels_max = 2, 416 .rates = WM8731_RATES, 417 .formats = WM8731_FORMATS,}, 418 .capture = { 419 .stream_name = "Capture", 420 .channels_min = 1, 421 .channels_max = 2, 422 .rates = WM8731_RATES, 423 .formats = WM8731_FORMATS,}, 424 .ops = &wm8731_dai_ops, 425 .symmetric_rates = 1, 426 }; 427 EXPORT_SYMBOL_GPL(wm8731_dai); 428 429 #ifdef CONFIG_PM 430 static int wm8731_suspend(struct platform_device *pdev, pm_message_t state) 431 { 432 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 433 struct snd_soc_codec *codec = socdev->card->codec; 434 struct wm8731_priv *wm8731 = codec->private_data; 435 436 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 437 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 438 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 439 wm8731->supplies); 440 return 0; 441 } 442 443 static int wm8731_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 struct wm8731_priv *wm8731 = codec->private_data; 448 int i, ret; 449 u8 data[2]; 450 u16 *cache = codec->reg_cache; 451 452 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 453 wm8731->supplies); 454 if (ret != 0) 455 return ret; 456 457 /* Sync reg_cache with the hardware */ 458 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) { 459 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 460 data[1] = cache[i] & 0x00ff; 461 codec->hw_write(codec->control_data, data, 2); 462 } 463 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 464 wm8731_set_bias_level(codec, codec->suspend_bias_level); 465 466 return 0; 467 } 468 #else 469 #define wm8731_suspend NULL 470 #define wm8731_resume NULL 471 #endif 472 473 static int wm8731_probe(struct platform_device *pdev) 474 { 475 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 476 struct snd_soc_codec *codec; 477 int ret = 0; 478 479 if (wm8731_codec == NULL) { 480 dev_err(&pdev->dev, "Codec device not registered\n"); 481 return -ENODEV; 482 } 483 484 socdev->card->codec = wm8731_codec; 485 codec = wm8731_codec; 486 487 /* register pcms */ 488 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 489 if (ret < 0) { 490 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 491 goto pcm_err; 492 } 493 494 snd_soc_add_controls(codec, wm8731_snd_controls, 495 ARRAY_SIZE(wm8731_snd_controls)); 496 wm8731_add_widgets(codec); 497 498 return ret; 499 500 pcm_err: 501 return ret; 502 } 503 504 /* power down chip */ 505 static int wm8731_remove(struct platform_device *pdev) 506 { 507 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 508 509 snd_soc_free_pcms(socdev); 510 snd_soc_dapm_free(socdev); 511 512 return 0; 513 } 514 515 struct snd_soc_codec_device soc_codec_dev_wm8731 = { 516 .probe = wm8731_probe, 517 .remove = wm8731_remove, 518 .suspend = wm8731_suspend, 519 .resume = wm8731_resume, 520 }; 521 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731); 522 523 static int wm8731_register(struct wm8731_priv *wm8731, 524 enum snd_soc_control_type control) 525 { 526 int ret, i; 527 struct snd_soc_codec *codec = &wm8731->codec; 528 529 if (wm8731_codec) { 530 dev_err(codec->dev, "Another WM8731 is registered\n"); 531 ret = -EINVAL; 532 goto err; 533 } 534 535 mutex_init(&codec->mutex); 536 INIT_LIST_HEAD(&codec->dapm_widgets); 537 INIT_LIST_HEAD(&codec->dapm_paths); 538 539 codec->private_data = wm8731; 540 codec->name = "WM8731"; 541 codec->owner = THIS_MODULE; 542 codec->bias_level = SND_SOC_BIAS_OFF; 543 codec->set_bias_level = wm8731_set_bias_level; 544 codec->dai = &wm8731_dai; 545 codec->num_dai = 1; 546 codec->reg_cache_size = WM8731_CACHEREGNUM; 547 codec->reg_cache = &wm8731->reg_cache; 548 549 memcpy(codec->reg_cache, wm8731_reg, sizeof(wm8731_reg)); 550 551 ret = snd_soc_codec_set_cache_io(codec, 7, 9, control); 552 if (ret < 0) { 553 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 554 goto err; 555 } 556 557 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 558 wm8731->supplies[i].supply = wm8731_supply_names[i]; 559 560 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 561 wm8731->supplies); 562 if (ret != 0) { 563 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 564 goto err; 565 } 566 567 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 568 wm8731->supplies); 569 if (ret != 0) { 570 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 571 goto err_regulator_get; 572 } 573 574 ret = wm8731_reset(codec); 575 if (ret < 0) { 576 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 577 goto err_regulator_enable; 578 } 579 580 wm8731_dai.dev = codec->dev; 581 582 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 583 584 /* Latch the update bits */ 585 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 586 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 587 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 588 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 589 590 /* Disable bypass path by default */ 591 snd_soc_update_bits(codec, WM8731_APANA, 0x4, 0); 592 593 wm8731_codec = codec; 594 595 ret = snd_soc_register_codec(codec); 596 if (ret != 0) { 597 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 598 goto err_regulator_enable; 599 } 600 601 ret = snd_soc_register_dai(&wm8731_dai); 602 if (ret != 0) { 603 dev_err(codec->dev, "Failed to register DAI: %d\n", ret); 604 snd_soc_unregister_codec(codec); 605 goto err_codec; 606 } 607 608 return 0; 609 610 err_codec: 611 snd_soc_unregister_codec(codec); 612 err_regulator_enable: 613 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 614 err_regulator_get: 615 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 616 err: 617 kfree(wm8731); 618 return ret; 619 } 620 621 static void wm8731_unregister(struct wm8731_priv *wm8731) 622 { 623 wm8731_set_bias_level(&wm8731->codec, SND_SOC_BIAS_OFF); 624 snd_soc_unregister_dai(&wm8731_dai); 625 snd_soc_unregister_codec(&wm8731->codec); 626 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 627 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 628 kfree(wm8731); 629 wm8731_codec = NULL; 630 } 631 632 #if defined(CONFIG_SPI_MASTER) 633 static int __devinit wm8731_spi_probe(struct spi_device *spi) 634 { 635 struct snd_soc_codec *codec; 636 struct wm8731_priv *wm8731; 637 638 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 639 if (wm8731 == NULL) 640 return -ENOMEM; 641 642 codec = &wm8731->codec; 643 codec->control_data = spi; 644 codec->dev = &spi->dev; 645 646 dev_set_drvdata(&spi->dev, wm8731); 647 648 return wm8731_register(wm8731, SND_SOC_SPI); 649 } 650 651 static int __devexit wm8731_spi_remove(struct spi_device *spi) 652 { 653 struct wm8731_priv *wm8731 = dev_get_drvdata(&spi->dev); 654 655 wm8731_unregister(wm8731); 656 657 return 0; 658 } 659 660 static struct spi_driver wm8731_spi_driver = { 661 .driver = { 662 .name = "wm8731", 663 .bus = &spi_bus_type, 664 .owner = THIS_MODULE, 665 }, 666 .probe = wm8731_spi_probe, 667 .remove = __devexit_p(wm8731_spi_remove), 668 }; 669 #endif /* CONFIG_SPI_MASTER */ 670 671 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 672 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c, 673 const struct i2c_device_id *id) 674 { 675 struct wm8731_priv *wm8731; 676 struct snd_soc_codec *codec; 677 678 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 679 if (wm8731 == NULL) 680 return -ENOMEM; 681 682 codec = &wm8731->codec; 683 684 i2c_set_clientdata(i2c, wm8731); 685 codec->control_data = i2c; 686 687 codec->dev = &i2c->dev; 688 689 return wm8731_register(wm8731, SND_SOC_I2C); 690 } 691 692 static __devexit int wm8731_i2c_remove(struct i2c_client *client) 693 { 694 struct wm8731_priv *wm8731 = i2c_get_clientdata(client); 695 wm8731_unregister(wm8731); 696 return 0; 697 } 698 699 static const struct i2c_device_id wm8731_i2c_id[] = { 700 { "wm8731", 0 }, 701 { } 702 }; 703 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 704 705 static struct i2c_driver wm8731_i2c_driver = { 706 .driver = { 707 .name = "WM8731 I2C Codec", 708 .owner = THIS_MODULE, 709 }, 710 .probe = wm8731_i2c_probe, 711 .remove = __devexit_p(wm8731_i2c_remove), 712 .id_table = wm8731_i2c_id, 713 }; 714 #endif 715 716 static int __init wm8731_modinit(void) 717 { 718 int ret; 719 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 720 ret = i2c_add_driver(&wm8731_i2c_driver); 721 if (ret != 0) { 722 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 723 ret); 724 } 725 #endif 726 #if defined(CONFIG_SPI_MASTER) 727 ret = spi_register_driver(&wm8731_spi_driver); 728 if (ret != 0) { 729 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 730 ret); 731 } 732 #endif 733 return 0; 734 } 735 module_init(wm8731_modinit); 736 737 static void __exit wm8731_exit(void) 738 { 739 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 740 i2c_del_driver(&wm8731_i2c_driver); 741 #endif 742 #if defined(CONFIG_SPI_MASTER) 743 spi_unregister_driver(&wm8731_spi_driver); 744 #endif 745 } 746 module_exit(wm8731_exit); 747 748 MODULE_DESCRIPTION("ASoC WM8731 driver"); 749 MODULE_AUTHOR("Richard Purdie"); 750 MODULE_LICENSE("GPL"); 751