1/* 2 * wm8731.c -- WM8731 ALSA SoC Audio driver 3 * 4 * Copyright 2005 Openedhand Ltd. 5 * Copyright 2006-12 Wolfson Microelectronics, plc 6 * 7 * Author: Richard Purdie <richard@openedhand.com> 8 * 9 * Based on wm8753.c by Liam Girdwood 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16#include <linux/module.h> 17#include <linux/moduleparam.h> 18#include <linux/init.h> 19#include <linux/delay.h> 20#include <linux/pm.h> 21#include <linux/i2c.h> 22#include <linux/slab.h> 23#include <linux/regmap.h> 24#include <linux/regulator/consumer.h> 25#include <linux/spi/spi.h> 26#include <linux/of_device.h> 27#include <linux/mutex.h> 28#include <linux/clk.h> 29#include <sound/core.h> 30#include <sound/pcm.h> 31#include <sound/pcm_params.h> 32#include <sound/soc.h> 33#include <sound/initval.h> 34#include <sound/tlv.h> 35 36#include "wm8731.h" 37 38#define WM8731_NUM_SUPPLIES 4 39static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = { 40 "AVDD", 41 "HPVDD", 42 "DCVDD", 43 "DBVDD", 44}; 45 46/* codec private data */ 47struct wm8731_priv { 48 struct regmap *regmap; 49 struct clk *mclk; 50 struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES]; 51 const struct snd_pcm_hw_constraint_list *constraints; 52 unsigned int sysclk; 53 int sysclk_type; 54 int playback_fs; 55 bool deemph; 56 57 struct mutex lock; 58}; 59 60 61/* 62 * wm8731 register cache 63 */ 64static const struct reg_default wm8731_reg_defaults[] = { 65 { 0, 0x0097 }, 66 { 1, 0x0097 }, 67 { 2, 0x0079 }, 68 { 3, 0x0079 }, 69 { 4, 0x000a }, 70 { 5, 0x0008 }, 71 { 6, 0x009f }, 72 { 7, 0x000a }, 73 { 8, 0x0000 }, 74 { 9, 0x0000 }, 75}; 76 77static bool wm8731_volatile(struct device *dev, unsigned int reg) 78{ 79 return reg == WM8731_RESET; 80} 81 82static bool wm8731_writeable(struct device *dev, unsigned int reg) 83{ 84 return reg <= WM8731_RESET; 85} 86 87#define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0) 88 89static const char *wm8731_input_select[] = {"Line In", "Mic"}; 90 91static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum, 92 WM8731_APANA, 2, wm8731_input_select); 93 94static int wm8731_deemph[] = { 0, 32000, 44100, 48000 }; 95 96static int wm8731_set_deemph(struct snd_soc_codec *codec) 97{ 98 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 99 int val, i, best; 100 101 /* If we're using deemphasis select the nearest available sample 102 * rate. 103 */ 104 if (wm8731->deemph) { 105 best = 1; 106 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) { 107 if (abs(wm8731_deemph[i] - wm8731->playback_fs) < 108 abs(wm8731_deemph[best] - wm8731->playback_fs)) 109 best = i; 110 } 111 112 val = best << 1; 113 } else { 114 best = 0; 115 val = 0; 116 } 117 118 dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n", 119 best, wm8731_deemph[best]); 120 121 return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val); 122} 123 124static int wm8731_get_deemph(struct snd_kcontrol *kcontrol, 125 struct snd_ctl_elem_value *ucontrol) 126{ 127 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 128 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 129 130 ucontrol->value.integer.value[0] = wm8731->deemph; 131 132 return 0; 133} 134 135static int wm8731_put_deemph(struct snd_kcontrol *kcontrol, 136 struct snd_ctl_elem_value *ucontrol) 137{ 138 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 139 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 140 int deemph = ucontrol->value.integer.value[0]; 141 int ret = 0; 142 143 if (deemph > 1) 144 return -EINVAL; 145 146 mutex_lock(&wm8731->lock); 147 if (wm8731->deemph != deemph) { 148 wm8731->deemph = deemph; 149 150 wm8731_set_deemph(codec); 151 152 ret = 1; 153 } 154 mutex_unlock(&wm8731->lock); 155 156 return ret; 157} 158 159static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 160static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 161static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 162static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0); 163 164static const struct snd_kcontrol_new wm8731_snd_controls[] = { 165 166SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 167 0, 127, 0, out_tlv), 168SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 169 7, 1, 0), 170 171SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 172 in_tlv), 173SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 174 175SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv), 176SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 177 178SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 179 sidetone_tlv), 180 181SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 182SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 183 184SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0, 185 wm8731_get_deemph, wm8731_put_deemph), 186}; 187 188/* Output Mixer */ 189static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 190SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 191SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 192SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 193}; 194 195/* Input mux */ 196static const struct snd_kcontrol_new wm8731_input_mux_controls = 197SOC_DAPM_ENUM("Input Select", wm8731_insel_enum); 198 199static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 200SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0), 201SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), 202SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 203 &wm8731_output_mixer_controls[0], 204 ARRAY_SIZE(wm8731_output_mixer_controls)), 205SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 206SND_SOC_DAPM_OUTPUT("LOUT"), 207SND_SOC_DAPM_OUTPUT("LHPOUT"), 208SND_SOC_DAPM_OUTPUT("ROUT"), 209SND_SOC_DAPM_OUTPUT("RHPOUT"), 210SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 211SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 212SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 213SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 214SND_SOC_DAPM_INPUT("MICIN"), 215SND_SOC_DAPM_INPUT("RLINEIN"), 216SND_SOC_DAPM_INPUT("LLINEIN"), 217}; 218 219static int wm8731_check_osc(struct snd_soc_dapm_widget *source, 220 struct snd_soc_dapm_widget *sink) 221{ 222 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(source->dapm); 223 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 224 225 return wm8731->sysclk_type == WM8731_SYSCLK_XTAL; 226} 227 228static const struct snd_soc_dapm_route wm8731_intercon[] = { 229 {"DAC", NULL, "OSC", wm8731_check_osc}, 230 {"ADC", NULL, "OSC", wm8731_check_osc}, 231 {"DAC", NULL, "ACTIVE"}, 232 {"ADC", NULL, "ACTIVE"}, 233 234 /* output mixer */ 235 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 236 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 237 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 238 239 /* outputs */ 240 {"RHPOUT", NULL, "Output Mixer"}, 241 {"ROUT", NULL, "Output Mixer"}, 242 {"LHPOUT", NULL, "Output Mixer"}, 243 {"LOUT", NULL, "Output Mixer"}, 244 245 /* input mux */ 246 {"Input Mux", "Line In", "Line Input"}, 247 {"Input Mux", "Mic", "Mic Bias"}, 248 {"ADC", NULL, "Input Mux"}, 249 250 /* inputs */ 251 {"Line Input", NULL, "LLINEIN"}, 252 {"Line Input", NULL, "RLINEIN"}, 253 {"Mic Bias", NULL, "MICIN"}, 254}; 255 256struct _coeff_div { 257 u32 mclk; 258 u32 rate; 259 u16 fs; 260 u8 sr:4; 261 u8 bosr:1; 262 u8 usb:1; 263}; 264 265/* codec mclk clock divider coefficients */ 266static const struct _coeff_div coeff_div[] = { 267 /* 48k */ 268 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 269 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 270 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 271 272 /* 32k */ 273 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 274 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 275 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 276 277 /* 8k */ 278 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 279 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 280 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 281 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 282 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 283 284 /* 96k */ 285 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 286 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 287 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 288 289 /* 44.1k */ 290 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 291 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 292 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 293 294 /* 88.2k */ 295 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 296 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 297 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 298}; 299 300/* rates constraints */ 301static const unsigned int wm8731_rates_12000000[] = { 302 8000, 32000, 44100, 48000, 96000, 88200, 303}; 304 305static const unsigned int wm8731_rates_12288000_18432000[] = { 306 8000, 32000, 48000, 96000, 307}; 308 309static const unsigned int wm8731_rates_11289600_16934400[] = { 310 8000, 44100, 88200, 311}; 312 313static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = { 314 .list = wm8731_rates_12000000, 315 .count = ARRAY_SIZE(wm8731_rates_12000000), 316}; 317 318static const 319struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = { 320 .list = wm8731_rates_12288000_18432000, 321 .count = ARRAY_SIZE(wm8731_rates_12288000_18432000), 322}; 323 324static const 325struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = { 326 .list = wm8731_rates_11289600_16934400, 327 .count = ARRAY_SIZE(wm8731_rates_11289600_16934400), 328}; 329 330static inline int get_coeff(int mclk, int rate) 331{ 332 int i; 333 334 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 335 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 336 return i; 337 } 338 return 0; 339} 340 341static int wm8731_hw_params(struct snd_pcm_substream *substream, 342 struct snd_pcm_hw_params *params, 343 struct snd_soc_dai *dai) 344{ 345 struct snd_soc_codec *codec = dai->codec; 346 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 347 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 348 int i = get_coeff(wm8731->sysclk, params_rate(params)); 349 u16 srate = (coeff_div[i].sr << 2) | 350 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 351 352 wm8731->playback_fs = params_rate(params); 353 354 snd_soc_write(codec, WM8731_SRATE, srate); 355 356 /* bit size */ 357 switch (params_width(params)) { 358 case 16: 359 break; 360 case 20: 361 iface |= 0x0004; 362 break; 363 case 24: 364 iface |= 0x0008; 365 break; 366 } 367 368 wm8731_set_deemph(codec); 369 370 snd_soc_write(codec, WM8731_IFACE, iface); 371 return 0; 372} 373 374static int wm8731_mute(struct snd_soc_dai *dai, int mute) 375{ 376 struct snd_soc_codec *codec = dai->codec; 377 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 378 379 if (mute) 380 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 381 else 382 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 383 return 0; 384} 385 386static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 387 int clk_id, unsigned int freq, int dir) 388{ 389 struct snd_soc_codec *codec = codec_dai->codec; 390 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 391 392 switch (clk_id) { 393 case WM8731_SYSCLK_XTAL: 394 case WM8731_SYSCLK_MCLK: 395 if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq)) 396 return -EINVAL; 397 wm8731->sysclk_type = clk_id; 398 break; 399 default: 400 return -EINVAL; 401 } 402 403 switch (freq) { 404 case 0: 405 wm8731->constraints = NULL; 406 break; 407 case 12000000: 408 wm8731->constraints = &wm8731_constraints_12000000; 409 break; 410 case 12288000: 411 case 18432000: 412 wm8731->constraints = &wm8731_constraints_12288000_18432000; 413 break; 414 case 16934400: 415 case 11289600: 416 wm8731->constraints = &wm8731_constraints_11289600_16934400; 417 break; 418 default: 419 return -EINVAL; 420 } 421 422 wm8731->sysclk = freq; 423 424 snd_soc_dapm_sync(&codec->dapm); 425 426 return 0; 427} 428 429 430static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 431 unsigned int fmt) 432{ 433 struct snd_soc_codec *codec = codec_dai->codec; 434 u16 iface = 0; 435 436 /* set master/slave audio interface */ 437 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 438 case SND_SOC_DAIFMT_CBM_CFM: 439 iface |= 0x0040; 440 break; 441 case SND_SOC_DAIFMT_CBS_CFS: 442 break; 443 default: 444 return -EINVAL; 445 } 446 447 /* interface format */ 448 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 449 case SND_SOC_DAIFMT_I2S: 450 iface |= 0x0002; 451 break; 452 case SND_SOC_DAIFMT_RIGHT_J: 453 break; 454 case SND_SOC_DAIFMT_LEFT_J: 455 iface |= 0x0001; 456 break; 457 case SND_SOC_DAIFMT_DSP_A: 458 iface |= 0x0013; 459 break; 460 case SND_SOC_DAIFMT_DSP_B: 461 iface |= 0x0003; 462 break; 463 default: 464 return -EINVAL; 465 } 466 467 /* clock inversion */ 468 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 469 case SND_SOC_DAIFMT_NB_NF: 470 break; 471 case SND_SOC_DAIFMT_IB_IF: 472 iface |= 0x0090; 473 break; 474 case SND_SOC_DAIFMT_IB_NF: 475 iface |= 0x0080; 476 break; 477 case SND_SOC_DAIFMT_NB_IF: 478 iface |= 0x0010; 479 break; 480 default: 481 return -EINVAL; 482 } 483 484 /* set iface */ 485 snd_soc_write(codec, WM8731_IFACE, iface); 486 return 0; 487} 488 489static int wm8731_set_bias_level(struct snd_soc_codec *codec, 490 enum snd_soc_bias_level level) 491{ 492 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 493 int ret; 494 u16 reg; 495 496 switch (level) { 497 case SND_SOC_BIAS_ON: 498 if (wm8731->mclk) 499 clk_prepare_enable(wm8731->mclk); 500 break; 501 case SND_SOC_BIAS_PREPARE: 502 break; 503 case SND_SOC_BIAS_STANDBY: 504 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 505 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 506 wm8731->supplies); 507 if (ret != 0) 508 return ret; 509 510 regcache_sync(wm8731->regmap); 511 } 512 513 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 514 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 515 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 516 break; 517 case SND_SOC_BIAS_OFF: 518 if (wm8731->mclk) 519 clk_disable_unprepare(wm8731->mclk); 520 snd_soc_write(codec, WM8731_PWR, 0xffff); 521 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 522 wm8731->supplies); 523 regcache_mark_dirty(wm8731->regmap); 524 break; 525 } 526 codec->dapm.bias_level = level; 527 return 0; 528} 529 530static int wm8731_startup(struct snd_pcm_substream *substream, 531 struct snd_soc_dai *dai) 532{ 533 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec); 534 535 if (wm8731->constraints) 536 snd_pcm_hw_constraint_list(substream->runtime, 0, 537 SNDRV_PCM_HW_PARAM_RATE, 538 wm8731->constraints); 539 540 return 0; 541} 542 543#define WM8731_RATES SNDRV_PCM_RATE_8000_96000 544 545#define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 546 SNDRV_PCM_FMTBIT_S24_LE) 547 548static const struct snd_soc_dai_ops wm8731_dai_ops = { 549 .startup = wm8731_startup, 550 .hw_params = wm8731_hw_params, 551 .digital_mute = wm8731_mute, 552 .set_sysclk = wm8731_set_dai_sysclk, 553 .set_fmt = wm8731_set_dai_fmt, 554}; 555 556static struct snd_soc_dai_driver wm8731_dai = { 557 .name = "wm8731-hifi", 558 .playback = { 559 .stream_name = "Playback", 560 .channels_min = 1, 561 .channels_max = 2, 562 .rates = WM8731_RATES, 563 .formats = WM8731_FORMATS,}, 564 .capture = { 565 .stream_name = "Capture", 566 .channels_min = 1, 567 .channels_max = 2, 568 .rates = WM8731_RATES, 569 .formats = WM8731_FORMATS,}, 570 .ops = &wm8731_dai_ops, 571 .symmetric_rates = 1, 572}; 573 574static int wm8731_probe(struct snd_soc_codec *codec) 575{ 576 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 577 int ret = 0, i; 578 579 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 580 wm8731->supplies[i].supply = wm8731_supply_names[i]; 581 582 ret = devm_regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 583 wm8731->supplies); 584 if (ret != 0) { 585 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 586 return ret; 587 } 588 589 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 590 wm8731->supplies); 591 if (ret != 0) { 592 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 593 return ret; 594 } 595 596 ret = wm8731_reset(codec); 597 if (ret < 0) { 598 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 599 goto err_regulator_enable; 600 } 601 602 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 603 604 /* Latch the update bits */ 605 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 606 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 607 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 608 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 609 610 /* Disable bypass path by default */ 611 snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0); 612 613 /* Regulators will have been enabled by bias management */ 614 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 615 616 return 0; 617 618err_regulator_enable: 619 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 620 621 return ret; 622} 623 624/* power down chip */ 625static int wm8731_remove(struct snd_soc_codec *codec) 626{ 627 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 628 629 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 630 631 return 0; 632} 633 634static struct snd_soc_codec_driver soc_codec_dev_wm8731 = { 635 .probe = wm8731_probe, 636 .remove = wm8731_remove, 637 .set_bias_level = wm8731_set_bias_level, 638 .suspend_bias_off = true, 639 640 .dapm_widgets = wm8731_dapm_widgets, 641 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), 642 .dapm_routes = wm8731_intercon, 643 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon), 644 .controls = wm8731_snd_controls, 645 .num_controls = ARRAY_SIZE(wm8731_snd_controls), 646}; 647 648static const struct of_device_id wm8731_of_match[] = { 649 { .compatible = "wlf,wm8731", }, 650 { } 651}; 652 653MODULE_DEVICE_TABLE(of, wm8731_of_match); 654 655static const struct regmap_config wm8731_regmap = { 656 .reg_bits = 7, 657 .val_bits = 9, 658 659 .max_register = WM8731_RESET, 660 .volatile_reg = wm8731_volatile, 661 .writeable_reg = wm8731_writeable, 662 663 .cache_type = REGCACHE_RBTREE, 664 .reg_defaults = wm8731_reg_defaults, 665 .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults), 666}; 667 668#if defined(CONFIG_SPI_MASTER) 669static int wm8731_spi_probe(struct spi_device *spi) 670{ 671 struct wm8731_priv *wm8731; 672 int ret; 673 674 wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL); 675 if (wm8731 == NULL) 676 return -ENOMEM; 677 678 wm8731->mclk = devm_clk_get(&spi->dev, "mclk"); 679 if (IS_ERR(wm8731->mclk)) { 680 ret = PTR_ERR(wm8731->mclk); 681 if (ret == -ENOENT) { 682 wm8731->mclk = NULL; 683 dev_warn(&spi->dev, "Assuming static MCLK\n"); 684 } else { 685 dev_err(&spi->dev, "Failed to get MCLK: %d\n", 686 ret); 687 return ret; 688 } 689 } 690 691 mutex_init(&wm8731->lock); 692 693 wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap); 694 if (IS_ERR(wm8731->regmap)) { 695 ret = PTR_ERR(wm8731->regmap); 696 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 697 ret); 698 return ret; 699 } 700 701 spi_set_drvdata(spi, wm8731); 702 703 ret = snd_soc_register_codec(&spi->dev, 704 &soc_codec_dev_wm8731, &wm8731_dai, 1); 705 if (ret != 0) { 706 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret); 707 return ret; 708 } 709 710 return 0; 711} 712 713static int wm8731_spi_remove(struct spi_device *spi) 714{ 715 snd_soc_unregister_codec(&spi->dev); 716 return 0; 717} 718 719static struct spi_driver wm8731_spi_driver = { 720 .driver = { 721 .name = "wm8731", 722 .owner = THIS_MODULE, 723 .of_match_table = wm8731_of_match, 724 }, 725 .probe = wm8731_spi_probe, 726 .remove = wm8731_spi_remove, 727}; 728#endif /* CONFIG_SPI_MASTER */ 729 730#if IS_ENABLED(CONFIG_I2C) 731static int wm8731_i2c_probe(struct i2c_client *i2c, 732 const struct i2c_device_id *id) 733{ 734 struct wm8731_priv *wm8731; 735 int ret; 736 737 wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv), 738 GFP_KERNEL); 739 if (wm8731 == NULL) 740 return -ENOMEM; 741 742 wm8731->mclk = devm_clk_get(&i2c->dev, "mclk"); 743 if (IS_ERR(wm8731->mclk)) { 744 ret = PTR_ERR(wm8731->mclk); 745 if (ret == -ENOENT) { 746 wm8731->mclk = NULL; 747 dev_warn(&i2c->dev, "Assuming static MCLK\n"); 748 } else { 749 dev_err(&i2c->dev, "Failed to get MCLK: %d\n", 750 ret); 751 return ret; 752 } 753 } 754 755 mutex_init(&wm8731->lock); 756 757 wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap); 758 if (IS_ERR(wm8731->regmap)) { 759 ret = PTR_ERR(wm8731->regmap); 760 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 761 ret); 762 return ret; 763 } 764 765 i2c_set_clientdata(i2c, wm8731); 766 767 ret = snd_soc_register_codec(&i2c->dev, 768 &soc_codec_dev_wm8731, &wm8731_dai, 1); 769 if (ret != 0) { 770 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); 771 return ret; 772 } 773 774 return 0; 775} 776 777static int wm8731_i2c_remove(struct i2c_client *client) 778{ 779 snd_soc_unregister_codec(&client->dev); 780 return 0; 781} 782 783static const struct i2c_device_id wm8731_i2c_id[] = { 784 { "wm8731", 0 }, 785 { } 786}; 787MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 788 789static struct i2c_driver wm8731_i2c_driver = { 790 .driver = { 791 .name = "wm8731", 792 .owner = THIS_MODULE, 793 .of_match_table = wm8731_of_match, 794 }, 795 .probe = wm8731_i2c_probe, 796 .remove = wm8731_i2c_remove, 797 .id_table = wm8731_i2c_id, 798}; 799#endif 800 801static int __init wm8731_modinit(void) 802{ 803 int ret = 0; 804#if IS_ENABLED(CONFIG_I2C) 805 ret = i2c_add_driver(&wm8731_i2c_driver); 806 if (ret != 0) { 807 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 808 ret); 809 } 810#endif 811#if defined(CONFIG_SPI_MASTER) 812 ret = spi_register_driver(&wm8731_spi_driver); 813 if (ret != 0) { 814 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 815 ret); 816 } 817#endif 818 return ret; 819} 820module_init(wm8731_modinit); 821 822static void __exit wm8731_exit(void) 823{ 824#if IS_ENABLED(CONFIG_I2C) 825 i2c_del_driver(&wm8731_i2c_driver); 826#endif 827#if defined(CONFIG_SPI_MASTER) 828 spi_unregister_driver(&wm8731_spi_driver); 829#endif 830} 831module_exit(wm8731_exit); 832 833MODULE_DESCRIPTION("ASoC WM8731 driver"); 834MODULE_AUTHOR("Richard Purdie"); 835MODULE_LICENSE("GPL"); 836