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 <sound/core.h> 29 #include <sound/pcm.h> 30 #include <sound/pcm_params.h> 31 #include <sound/soc.h> 32 #include <sound/initval.h> 33 #include <sound/tlv.h> 34 35 #include "wm8731.h" 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 regmap *regmap; 48 struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES]; 49 const struct snd_pcm_hw_constraint_list *constraints; 50 unsigned int sysclk; 51 int sysclk_type; 52 int playback_fs; 53 bool deemph; 54 55 struct mutex lock; 56 }; 57 58 59 /* 60 * wm8731 register cache 61 */ 62 static const struct reg_default wm8731_reg_defaults[] = { 63 { 0, 0x0097 }, 64 { 1, 0x0097 }, 65 { 2, 0x0079 }, 66 { 3, 0x0079 }, 67 { 4, 0x000a }, 68 { 5, 0x0008 }, 69 { 6, 0x009f }, 70 { 7, 0x000a }, 71 { 8, 0x0000 }, 72 { 9, 0x0000 }, 73 }; 74 75 static bool wm8731_volatile(struct device *dev, unsigned int reg) 76 { 77 return reg == WM8731_RESET; 78 } 79 80 static bool wm8731_writeable(struct device *dev, unsigned int reg) 81 { 82 return reg <= WM8731_RESET; 83 } 84 85 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0) 86 87 static const char *wm8731_input_select[] = {"Line In", "Mic"}; 88 89 static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum, 90 WM8731_APANA, 2, wm8731_input_select); 91 92 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 }; 93 94 static int wm8731_set_deemph(struct snd_soc_codec *codec) 95 { 96 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 97 int val, i, best; 98 99 /* If we're using deemphasis select the nearest available sample 100 * rate. 101 */ 102 if (wm8731->deemph) { 103 best = 1; 104 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) { 105 if (abs(wm8731_deemph[i] - wm8731->playback_fs) < 106 abs(wm8731_deemph[best] - wm8731->playback_fs)) 107 best = i; 108 } 109 110 val = best << 1; 111 } else { 112 best = 0; 113 val = 0; 114 } 115 116 dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n", 117 best, wm8731_deemph[best]); 118 119 return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val); 120 } 121 122 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol, 123 struct snd_ctl_elem_value *ucontrol) 124 { 125 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 126 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 127 128 ucontrol->value.enumerated.item[0] = wm8731->deemph; 129 130 return 0; 131 } 132 133 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol, 134 struct snd_ctl_elem_value *ucontrol) 135 { 136 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 137 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 138 int deemph = ucontrol->value.enumerated.item[0]; 139 int ret = 0; 140 141 if (deemph > 1) 142 return -EINVAL; 143 144 mutex_lock(&wm8731->lock); 145 if (wm8731->deemph != deemph) { 146 wm8731->deemph = deemph; 147 148 wm8731_set_deemph(codec); 149 150 ret = 1; 151 } 152 mutex_unlock(&wm8731->lock); 153 154 return ret; 155 } 156 157 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 158 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 159 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 160 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0); 161 162 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 163 164 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 165 0, 127, 0, out_tlv), 166 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 167 7, 1, 0), 168 169 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 170 in_tlv), 171 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 172 173 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv), 174 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 175 176 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 177 sidetone_tlv), 178 179 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 180 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 181 182 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0, 183 wm8731_get_deemph, wm8731_put_deemph), 184 }; 185 186 /* Output Mixer */ 187 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 188 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 189 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 190 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 191 }; 192 193 /* Input mux */ 194 static const struct snd_kcontrol_new wm8731_input_mux_controls = 195 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum); 196 197 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 198 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0), 199 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), 200 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 201 &wm8731_output_mixer_controls[0], 202 ARRAY_SIZE(wm8731_output_mixer_controls)), 203 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 204 SND_SOC_DAPM_OUTPUT("LOUT"), 205 SND_SOC_DAPM_OUTPUT("LHPOUT"), 206 SND_SOC_DAPM_OUTPUT("ROUT"), 207 SND_SOC_DAPM_OUTPUT("RHPOUT"), 208 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 209 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 210 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 211 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 212 SND_SOC_DAPM_INPUT("MICIN"), 213 SND_SOC_DAPM_INPUT("RLINEIN"), 214 SND_SOC_DAPM_INPUT("LLINEIN"), 215 }; 216 217 static int wm8731_check_osc(struct snd_soc_dapm_widget *source, 218 struct snd_soc_dapm_widget *sink) 219 { 220 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec); 221 222 return wm8731->sysclk_type == WM8731_SYSCLK_XTAL; 223 } 224 225 static const struct snd_soc_dapm_route wm8731_intercon[] = { 226 {"DAC", NULL, "OSC", wm8731_check_osc}, 227 {"ADC", NULL, "OSC", wm8731_check_osc}, 228 {"DAC", NULL, "ACTIVE"}, 229 {"ADC", NULL, "ACTIVE"}, 230 231 /* output mixer */ 232 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 233 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 234 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 235 236 /* outputs */ 237 {"RHPOUT", NULL, "Output Mixer"}, 238 {"ROUT", NULL, "Output Mixer"}, 239 {"LHPOUT", NULL, "Output Mixer"}, 240 {"LOUT", NULL, "Output Mixer"}, 241 242 /* input mux */ 243 {"Input Mux", "Line In", "Line Input"}, 244 {"Input Mux", "Mic", "Mic Bias"}, 245 {"ADC", NULL, "Input Mux"}, 246 247 /* inputs */ 248 {"Line Input", NULL, "LLINEIN"}, 249 {"Line Input", NULL, "RLINEIN"}, 250 {"Mic Bias", NULL, "MICIN"}, 251 }; 252 253 struct _coeff_div { 254 u32 mclk; 255 u32 rate; 256 u16 fs; 257 u8 sr:4; 258 u8 bosr:1; 259 u8 usb:1; 260 }; 261 262 /* codec mclk clock divider coefficients */ 263 static const struct _coeff_div coeff_div[] = { 264 /* 48k */ 265 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 266 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 267 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 268 269 /* 32k */ 270 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 271 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 272 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 273 274 /* 8k */ 275 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 276 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 277 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 278 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 279 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 280 281 /* 96k */ 282 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 283 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 284 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 285 286 /* 44.1k */ 287 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 288 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 289 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 290 291 /* 88.2k */ 292 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 293 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 294 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 295 }; 296 297 /* rates constraints */ 298 static const unsigned int wm8731_rates_12000000[] = { 299 8000, 32000, 44100, 48000, 96000, 88200, 300 }; 301 302 static const unsigned int wm8731_rates_12288000_18432000[] = { 303 8000, 32000, 48000, 96000, 304 }; 305 306 static const unsigned int wm8731_rates_11289600_16934400[] = { 307 8000, 44100, 88200, 308 }; 309 310 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = { 311 .list = wm8731_rates_12000000, 312 .count = ARRAY_SIZE(wm8731_rates_12000000), 313 }; 314 315 static const 316 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = { 317 .list = wm8731_rates_12288000_18432000, 318 .count = ARRAY_SIZE(wm8731_rates_12288000_18432000), 319 }; 320 321 static const 322 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = { 323 .list = wm8731_rates_11289600_16934400, 324 .count = ARRAY_SIZE(wm8731_rates_11289600_16934400), 325 }; 326 327 static inline int get_coeff(int mclk, int rate) 328 { 329 int i; 330 331 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 332 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 333 return i; 334 } 335 return 0; 336 } 337 338 static int wm8731_hw_params(struct snd_pcm_substream *substream, 339 struct snd_pcm_hw_params *params, 340 struct snd_soc_dai *dai) 341 { 342 struct snd_soc_codec *codec = dai->codec; 343 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 344 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 345 int i = get_coeff(wm8731->sysclk, params_rate(params)); 346 u16 srate = (coeff_div[i].sr << 2) | 347 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 348 349 wm8731->playback_fs = params_rate(params); 350 351 snd_soc_write(codec, WM8731_SRATE, srate); 352 353 /* bit size */ 354 switch (params_width(params)) { 355 case 16: 356 break; 357 case 20: 358 iface |= 0x0004; 359 break; 360 case 24: 361 iface |= 0x0008; 362 break; 363 } 364 365 wm8731_set_deemph(codec); 366 367 snd_soc_write(codec, WM8731_IFACE, iface); 368 return 0; 369 } 370 371 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 372 { 373 struct snd_soc_codec *codec = dai->codec; 374 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 375 376 if (mute) 377 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 378 else 379 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 380 return 0; 381 } 382 383 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 384 int clk_id, unsigned int freq, int dir) 385 { 386 struct snd_soc_codec *codec = codec_dai->codec; 387 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 388 389 switch (clk_id) { 390 case WM8731_SYSCLK_XTAL: 391 case WM8731_SYSCLK_MCLK: 392 wm8731->sysclk_type = clk_id; 393 break; 394 default: 395 return -EINVAL; 396 } 397 398 switch (freq) { 399 case 0: 400 wm8731->constraints = NULL; 401 break; 402 case 12000000: 403 wm8731->constraints = &wm8731_constraints_12000000; 404 break; 405 case 12288000: 406 case 18432000: 407 wm8731->constraints = &wm8731_constraints_12288000_18432000; 408 break; 409 case 16934400: 410 case 11289600: 411 wm8731->constraints = &wm8731_constraints_11289600_16934400; 412 break; 413 default: 414 return -EINVAL; 415 } 416 417 wm8731->sysclk = freq; 418 419 snd_soc_dapm_sync(&codec->dapm); 420 421 return 0; 422 } 423 424 425 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 426 unsigned int fmt) 427 { 428 struct snd_soc_codec *codec = codec_dai->codec; 429 u16 iface = 0; 430 431 /* set master/slave audio interface */ 432 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 433 case SND_SOC_DAIFMT_CBM_CFM: 434 iface |= 0x0040; 435 break; 436 case SND_SOC_DAIFMT_CBS_CFS: 437 break; 438 default: 439 return -EINVAL; 440 } 441 442 /* interface format */ 443 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 444 case SND_SOC_DAIFMT_I2S: 445 iface |= 0x0002; 446 break; 447 case SND_SOC_DAIFMT_RIGHT_J: 448 break; 449 case SND_SOC_DAIFMT_LEFT_J: 450 iface |= 0x0001; 451 break; 452 case SND_SOC_DAIFMT_DSP_A: 453 iface |= 0x0013; 454 break; 455 case SND_SOC_DAIFMT_DSP_B: 456 iface |= 0x0003; 457 break; 458 default: 459 return -EINVAL; 460 } 461 462 /* clock inversion */ 463 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 464 case SND_SOC_DAIFMT_NB_NF: 465 break; 466 case SND_SOC_DAIFMT_IB_IF: 467 iface |= 0x0090; 468 break; 469 case SND_SOC_DAIFMT_IB_NF: 470 iface |= 0x0080; 471 break; 472 case SND_SOC_DAIFMT_NB_IF: 473 iface |= 0x0010; 474 break; 475 default: 476 return -EINVAL; 477 } 478 479 /* set iface */ 480 snd_soc_write(codec, WM8731_IFACE, iface); 481 return 0; 482 } 483 484 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 485 enum snd_soc_bias_level level) 486 { 487 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 488 int ret; 489 u16 reg; 490 491 switch (level) { 492 case SND_SOC_BIAS_ON: 493 break; 494 case SND_SOC_BIAS_PREPARE: 495 break; 496 case SND_SOC_BIAS_STANDBY: 497 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 498 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 499 wm8731->supplies); 500 if (ret != 0) 501 return ret; 502 503 regcache_sync(wm8731->regmap); 504 } 505 506 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 507 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 508 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 509 break; 510 case SND_SOC_BIAS_OFF: 511 snd_soc_write(codec, WM8731_PWR, 0xffff); 512 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 513 wm8731->supplies); 514 regcache_mark_dirty(wm8731->regmap); 515 break; 516 } 517 codec->dapm.bias_level = level; 518 return 0; 519 } 520 521 static int wm8731_startup(struct snd_pcm_substream *substream, 522 struct snd_soc_dai *dai) 523 { 524 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec); 525 526 if (wm8731->constraints) 527 snd_pcm_hw_constraint_list(substream->runtime, 0, 528 SNDRV_PCM_HW_PARAM_RATE, 529 wm8731->constraints); 530 531 return 0; 532 } 533 534 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 535 536 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 537 SNDRV_PCM_FMTBIT_S24_LE) 538 539 static const struct snd_soc_dai_ops wm8731_dai_ops = { 540 .startup = wm8731_startup, 541 .hw_params = wm8731_hw_params, 542 .digital_mute = wm8731_mute, 543 .set_sysclk = wm8731_set_dai_sysclk, 544 .set_fmt = wm8731_set_dai_fmt, 545 }; 546 547 static struct snd_soc_dai_driver wm8731_dai = { 548 .name = "wm8731-hifi", 549 .playback = { 550 .stream_name = "Playback", 551 .channels_min = 1, 552 .channels_max = 2, 553 .rates = WM8731_RATES, 554 .formats = WM8731_FORMATS,}, 555 .capture = { 556 .stream_name = "Capture", 557 .channels_min = 1, 558 .channels_max = 2, 559 .rates = WM8731_RATES, 560 .formats = WM8731_FORMATS,}, 561 .ops = &wm8731_dai_ops, 562 .symmetric_rates = 1, 563 }; 564 565 #ifdef CONFIG_PM 566 static int wm8731_suspend(struct snd_soc_codec *codec) 567 { 568 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 569 570 return 0; 571 } 572 573 static int wm8731_resume(struct snd_soc_codec *codec) 574 { 575 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 576 577 return 0; 578 } 579 #else 580 #define wm8731_suspend NULL 581 #define wm8731_resume NULL 582 #endif 583 584 static int wm8731_probe(struct snd_soc_codec *codec) 585 { 586 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 587 int ret = 0, i; 588 589 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 590 wm8731->supplies[i].supply = wm8731_supply_names[i]; 591 592 ret = devm_regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 593 wm8731->supplies); 594 if (ret != 0) { 595 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 596 return ret; 597 } 598 599 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 600 wm8731->supplies); 601 if (ret != 0) { 602 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 603 return ret; 604 } 605 606 ret = wm8731_reset(codec); 607 if (ret < 0) { 608 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 609 goto err_regulator_enable; 610 } 611 612 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 613 614 /* Latch the update bits */ 615 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 616 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 617 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 618 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 619 620 /* Disable bypass path by default */ 621 snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0); 622 623 /* Regulators will have been enabled by bias management */ 624 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 625 626 return 0; 627 628 err_regulator_enable: 629 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 630 631 return ret; 632 } 633 634 /* power down chip */ 635 static int wm8731_remove(struct snd_soc_codec *codec) 636 { 637 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 638 639 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 640 641 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 642 643 return 0; 644 } 645 646 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = { 647 .probe = wm8731_probe, 648 .remove = wm8731_remove, 649 .suspend = wm8731_suspend, 650 .resume = wm8731_resume, 651 .set_bias_level = wm8731_set_bias_level, 652 .dapm_widgets = wm8731_dapm_widgets, 653 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), 654 .dapm_routes = wm8731_intercon, 655 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon), 656 .controls = wm8731_snd_controls, 657 .num_controls = ARRAY_SIZE(wm8731_snd_controls), 658 }; 659 660 static const struct of_device_id wm8731_of_match[] = { 661 { .compatible = "wlf,wm8731", }, 662 { } 663 }; 664 665 MODULE_DEVICE_TABLE(of, wm8731_of_match); 666 667 static const struct regmap_config wm8731_regmap = { 668 .reg_bits = 7, 669 .val_bits = 9, 670 671 .max_register = WM8731_RESET, 672 .volatile_reg = wm8731_volatile, 673 .writeable_reg = wm8731_writeable, 674 675 .cache_type = REGCACHE_RBTREE, 676 .reg_defaults = wm8731_reg_defaults, 677 .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults), 678 }; 679 680 #if defined(CONFIG_SPI_MASTER) 681 static int wm8731_spi_probe(struct spi_device *spi) 682 { 683 struct wm8731_priv *wm8731; 684 int ret; 685 686 wm8731 = devm_kzalloc(&spi->dev, sizeof(struct wm8731_priv), 687 GFP_KERNEL); 688 if (wm8731 == NULL) 689 return -ENOMEM; 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 } 712 713 static int wm8731_spi_remove(struct spi_device *spi) 714 { 715 snd_soc_unregister_codec(&spi->dev); 716 return 0; 717 } 718 719 static 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) 731 static 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->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap); 743 if (IS_ERR(wm8731->regmap)) { 744 ret = PTR_ERR(wm8731->regmap); 745 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 746 ret); 747 return ret; 748 } 749 750 i2c_set_clientdata(i2c, wm8731); 751 752 ret = snd_soc_register_codec(&i2c->dev, 753 &soc_codec_dev_wm8731, &wm8731_dai, 1); 754 if (ret != 0) { 755 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); 756 return ret; 757 } 758 759 return 0; 760 } 761 762 static int wm8731_i2c_remove(struct i2c_client *client) 763 { 764 snd_soc_unregister_codec(&client->dev); 765 return 0; 766 } 767 768 static const struct i2c_device_id wm8731_i2c_id[] = { 769 { "wm8731", 0 }, 770 { } 771 }; 772 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 773 774 static struct i2c_driver wm8731_i2c_driver = { 775 .driver = { 776 .name = "wm8731", 777 .owner = THIS_MODULE, 778 .of_match_table = wm8731_of_match, 779 }, 780 .probe = wm8731_i2c_probe, 781 .remove = wm8731_i2c_remove, 782 .id_table = wm8731_i2c_id, 783 }; 784 #endif 785 786 static int __init wm8731_modinit(void) 787 { 788 int ret = 0; 789 #if IS_ENABLED(CONFIG_I2C) 790 ret = i2c_add_driver(&wm8731_i2c_driver); 791 if (ret != 0) { 792 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 793 ret); 794 } 795 #endif 796 #if defined(CONFIG_SPI_MASTER) 797 ret = spi_register_driver(&wm8731_spi_driver); 798 if (ret != 0) { 799 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 800 ret); 801 } 802 #endif 803 return ret; 804 } 805 module_init(wm8731_modinit); 806 807 static void __exit wm8731_exit(void) 808 { 809 #if IS_ENABLED(CONFIG_I2C) 810 i2c_del_driver(&wm8731_i2c_driver); 811 #endif 812 #if defined(CONFIG_SPI_MASTER) 813 spi_unregister_driver(&wm8731_spi_driver); 814 #endif 815 } 816 module_exit(wm8731_exit); 817 818 MODULE_DESCRIPTION("ASoC WM8731 driver"); 819 MODULE_AUTHOR("Richard Purdie"); 820 MODULE_LICENSE("GPL"); 821