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 snd_soc_codec *codec = snd_soc_dapm_to_codec(source->dapm); 221 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 222 223 return wm8731->sysclk_type == WM8731_SYSCLK_XTAL; 224 } 225 226 static const struct snd_soc_dapm_route wm8731_intercon[] = { 227 {"DAC", NULL, "OSC", wm8731_check_osc}, 228 {"ADC", NULL, "OSC", wm8731_check_osc}, 229 {"DAC", NULL, "ACTIVE"}, 230 {"ADC", NULL, "ACTIVE"}, 231 232 /* output mixer */ 233 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 234 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 235 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 236 237 /* outputs */ 238 {"RHPOUT", NULL, "Output Mixer"}, 239 {"ROUT", NULL, "Output Mixer"}, 240 {"LHPOUT", NULL, "Output Mixer"}, 241 {"LOUT", NULL, "Output Mixer"}, 242 243 /* input mux */ 244 {"Input Mux", "Line In", "Line Input"}, 245 {"Input Mux", "Mic", "Mic Bias"}, 246 {"ADC", NULL, "Input Mux"}, 247 248 /* inputs */ 249 {"Line Input", NULL, "LLINEIN"}, 250 {"Line Input", NULL, "RLINEIN"}, 251 {"Mic Bias", NULL, "MICIN"}, 252 }; 253 254 struct _coeff_div { 255 u32 mclk; 256 u32 rate; 257 u16 fs; 258 u8 sr:4; 259 u8 bosr:1; 260 u8 usb:1; 261 }; 262 263 /* codec mclk clock divider coefficients */ 264 static const struct _coeff_div coeff_div[] = { 265 /* 48k */ 266 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 267 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 268 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 269 270 /* 32k */ 271 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 272 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 273 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 274 275 /* 8k */ 276 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 277 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 278 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 279 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 280 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 281 282 /* 96k */ 283 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 284 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 285 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 286 287 /* 44.1k */ 288 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 289 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 290 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 291 292 /* 88.2k */ 293 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 294 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 295 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 296 }; 297 298 /* rates constraints */ 299 static const unsigned int wm8731_rates_12000000[] = { 300 8000, 32000, 44100, 48000, 96000, 88200, 301 }; 302 303 static const unsigned int wm8731_rates_12288000_18432000[] = { 304 8000, 32000, 48000, 96000, 305 }; 306 307 static const unsigned int wm8731_rates_11289600_16934400[] = { 308 8000, 44100, 88200, 309 }; 310 311 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = { 312 .list = wm8731_rates_12000000, 313 .count = ARRAY_SIZE(wm8731_rates_12000000), 314 }; 315 316 static const 317 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = { 318 .list = wm8731_rates_12288000_18432000, 319 .count = ARRAY_SIZE(wm8731_rates_12288000_18432000), 320 }; 321 322 static const 323 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = { 324 .list = wm8731_rates_11289600_16934400, 325 .count = ARRAY_SIZE(wm8731_rates_11289600_16934400), 326 }; 327 328 static inline int get_coeff(int mclk, int rate) 329 { 330 int i; 331 332 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 333 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 334 return i; 335 } 336 return 0; 337 } 338 339 static int wm8731_hw_params(struct snd_pcm_substream *substream, 340 struct snd_pcm_hw_params *params, 341 struct snd_soc_dai *dai) 342 { 343 struct snd_soc_codec *codec = dai->codec; 344 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 345 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 346 int i = get_coeff(wm8731->sysclk, params_rate(params)); 347 u16 srate = (coeff_div[i].sr << 2) | 348 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 349 350 wm8731->playback_fs = params_rate(params); 351 352 snd_soc_write(codec, WM8731_SRATE, srate); 353 354 /* bit size */ 355 switch (params_width(params)) { 356 case 16: 357 break; 358 case 20: 359 iface |= 0x0004; 360 break; 361 case 24: 362 iface |= 0x0008; 363 break; 364 } 365 366 wm8731_set_deemph(codec); 367 368 snd_soc_write(codec, WM8731_IFACE, iface); 369 return 0; 370 } 371 372 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 373 { 374 struct snd_soc_codec *codec = dai->codec; 375 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 376 377 if (mute) 378 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 379 else 380 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 381 return 0; 382 } 383 384 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 385 int clk_id, unsigned int freq, int dir) 386 { 387 struct snd_soc_codec *codec = codec_dai->codec; 388 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 389 390 switch (clk_id) { 391 case WM8731_SYSCLK_XTAL: 392 case WM8731_SYSCLK_MCLK: 393 wm8731->sysclk_type = clk_id; 394 break; 395 default: 396 return -EINVAL; 397 } 398 399 switch (freq) { 400 case 0: 401 wm8731->constraints = NULL; 402 break; 403 case 12000000: 404 wm8731->constraints = &wm8731_constraints_12000000; 405 break; 406 case 12288000: 407 case 18432000: 408 wm8731->constraints = &wm8731_constraints_12288000_18432000; 409 break; 410 case 16934400: 411 case 11289600: 412 wm8731->constraints = &wm8731_constraints_11289600_16934400; 413 break; 414 default: 415 return -EINVAL; 416 } 417 418 wm8731->sysclk = freq; 419 420 snd_soc_dapm_sync(&codec->dapm); 421 422 return 0; 423 } 424 425 426 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 427 unsigned int fmt) 428 { 429 struct snd_soc_codec *codec = codec_dai->codec; 430 u16 iface = 0; 431 432 /* set master/slave audio interface */ 433 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 434 case SND_SOC_DAIFMT_CBM_CFM: 435 iface |= 0x0040; 436 break; 437 case SND_SOC_DAIFMT_CBS_CFS: 438 break; 439 default: 440 return -EINVAL; 441 } 442 443 /* interface format */ 444 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 445 case SND_SOC_DAIFMT_I2S: 446 iface |= 0x0002; 447 break; 448 case SND_SOC_DAIFMT_RIGHT_J: 449 break; 450 case SND_SOC_DAIFMT_LEFT_J: 451 iface |= 0x0001; 452 break; 453 case SND_SOC_DAIFMT_DSP_A: 454 iface |= 0x0013; 455 break; 456 case SND_SOC_DAIFMT_DSP_B: 457 iface |= 0x0003; 458 break; 459 default: 460 return -EINVAL; 461 } 462 463 /* clock inversion */ 464 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 465 case SND_SOC_DAIFMT_NB_NF: 466 break; 467 case SND_SOC_DAIFMT_IB_IF: 468 iface |= 0x0090; 469 break; 470 case SND_SOC_DAIFMT_IB_NF: 471 iface |= 0x0080; 472 break; 473 case SND_SOC_DAIFMT_NB_IF: 474 iface |= 0x0010; 475 break; 476 default: 477 return -EINVAL; 478 } 479 480 /* set iface */ 481 snd_soc_write(codec, WM8731_IFACE, iface); 482 return 0; 483 } 484 485 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 486 enum snd_soc_bias_level level) 487 { 488 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 489 int ret; 490 u16 reg; 491 492 switch (level) { 493 case SND_SOC_BIAS_ON: 494 break; 495 case SND_SOC_BIAS_PREPARE: 496 break; 497 case SND_SOC_BIAS_STANDBY: 498 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 499 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 500 wm8731->supplies); 501 if (ret != 0) 502 return ret; 503 504 regcache_sync(wm8731->regmap); 505 } 506 507 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 508 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 509 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 510 break; 511 case SND_SOC_BIAS_OFF: 512 snd_soc_write(codec, WM8731_PWR, 0xffff); 513 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 514 wm8731->supplies); 515 regcache_mark_dirty(wm8731->regmap); 516 break; 517 } 518 codec->dapm.bias_level = level; 519 return 0; 520 } 521 522 static int wm8731_startup(struct snd_pcm_substream *substream, 523 struct snd_soc_dai *dai) 524 { 525 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec); 526 527 if (wm8731->constraints) 528 snd_pcm_hw_constraint_list(substream->runtime, 0, 529 SNDRV_PCM_HW_PARAM_RATE, 530 wm8731->constraints); 531 532 return 0; 533 } 534 535 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 536 537 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 538 SNDRV_PCM_FMTBIT_S24_LE) 539 540 static const struct snd_soc_dai_ops wm8731_dai_ops = { 541 .startup = wm8731_startup, 542 .hw_params = wm8731_hw_params, 543 .digital_mute = wm8731_mute, 544 .set_sysclk = wm8731_set_dai_sysclk, 545 .set_fmt = wm8731_set_dai_fmt, 546 }; 547 548 static struct snd_soc_dai_driver wm8731_dai = { 549 .name = "wm8731-hifi", 550 .playback = { 551 .stream_name = "Playback", 552 .channels_min = 1, 553 .channels_max = 2, 554 .rates = WM8731_RATES, 555 .formats = WM8731_FORMATS,}, 556 .capture = { 557 .stream_name = "Capture", 558 .channels_min = 1, 559 .channels_max = 2, 560 .rates = WM8731_RATES, 561 .formats = WM8731_FORMATS,}, 562 .ops = &wm8731_dai_ops, 563 .symmetric_rates = 1, 564 }; 565 566 static int wm8731_probe(struct snd_soc_codec *codec) 567 { 568 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 569 int ret = 0, i; 570 571 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 572 wm8731->supplies[i].supply = wm8731_supply_names[i]; 573 574 ret = devm_regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 575 wm8731->supplies); 576 if (ret != 0) { 577 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 578 return ret; 579 } 580 581 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 582 wm8731->supplies); 583 if (ret != 0) { 584 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 585 return ret; 586 } 587 588 ret = wm8731_reset(codec); 589 if (ret < 0) { 590 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 591 goto err_regulator_enable; 592 } 593 594 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 595 596 /* Latch the update bits */ 597 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 598 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 599 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 600 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 601 602 /* Disable bypass path by default */ 603 snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0); 604 605 /* Regulators will have been enabled by bias management */ 606 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 607 608 return 0; 609 610 err_regulator_enable: 611 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 612 613 return ret; 614 } 615 616 /* power down chip */ 617 static int wm8731_remove(struct snd_soc_codec *codec) 618 { 619 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 620 621 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 622 623 return 0; 624 } 625 626 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = { 627 .probe = wm8731_probe, 628 .remove = wm8731_remove, 629 .set_bias_level = wm8731_set_bias_level, 630 .suspend_bias_off = true, 631 632 .dapm_widgets = wm8731_dapm_widgets, 633 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), 634 .dapm_routes = wm8731_intercon, 635 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon), 636 .controls = wm8731_snd_controls, 637 .num_controls = ARRAY_SIZE(wm8731_snd_controls), 638 }; 639 640 static const struct of_device_id wm8731_of_match[] = { 641 { .compatible = "wlf,wm8731", }, 642 { } 643 }; 644 645 MODULE_DEVICE_TABLE(of, wm8731_of_match); 646 647 static const struct regmap_config wm8731_regmap = { 648 .reg_bits = 7, 649 .val_bits = 9, 650 651 .max_register = WM8731_RESET, 652 .volatile_reg = wm8731_volatile, 653 .writeable_reg = wm8731_writeable, 654 655 .cache_type = REGCACHE_RBTREE, 656 .reg_defaults = wm8731_reg_defaults, 657 .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults), 658 }; 659 660 #if defined(CONFIG_SPI_MASTER) 661 static int wm8731_spi_probe(struct spi_device *spi) 662 { 663 struct wm8731_priv *wm8731; 664 int ret; 665 666 wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL); 667 if (wm8731 == NULL) 668 return -ENOMEM; 669 670 mutex_init(&wm8731->lock); 671 672 wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap); 673 if (IS_ERR(wm8731->regmap)) { 674 ret = PTR_ERR(wm8731->regmap); 675 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 676 ret); 677 return ret; 678 } 679 680 spi_set_drvdata(spi, wm8731); 681 682 ret = snd_soc_register_codec(&spi->dev, 683 &soc_codec_dev_wm8731, &wm8731_dai, 1); 684 if (ret != 0) { 685 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret); 686 return ret; 687 } 688 689 return 0; 690 } 691 692 static int wm8731_spi_remove(struct spi_device *spi) 693 { 694 snd_soc_unregister_codec(&spi->dev); 695 return 0; 696 } 697 698 static struct spi_driver wm8731_spi_driver = { 699 .driver = { 700 .name = "wm8731", 701 .owner = THIS_MODULE, 702 .of_match_table = wm8731_of_match, 703 }, 704 .probe = wm8731_spi_probe, 705 .remove = wm8731_spi_remove, 706 }; 707 #endif /* CONFIG_SPI_MASTER */ 708 709 #if IS_ENABLED(CONFIG_I2C) 710 static int wm8731_i2c_probe(struct i2c_client *i2c, 711 const struct i2c_device_id *id) 712 { 713 struct wm8731_priv *wm8731; 714 int ret; 715 716 wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv), 717 GFP_KERNEL); 718 if (wm8731 == NULL) 719 return -ENOMEM; 720 721 mutex_init(&wm8731->lock); 722 723 wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap); 724 if (IS_ERR(wm8731->regmap)) { 725 ret = PTR_ERR(wm8731->regmap); 726 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 727 ret); 728 return ret; 729 } 730 731 i2c_set_clientdata(i2c, wm8731); 732 733 ret = snd_soc_register_codec(&i2c->dev, 734 &soc_codec_dev_wm8731, &wm8731_dai, 1); 735 if (ret != 0) { 736 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); 737 return ret; 738 } 739 740 return 0; 741 } 742 743 static int wm8731_i2c_remove(struct i2c_client *client) 744 { 745 snd_soc_unregister_codec(&client->dev); 746 return 0; 747 } 748 749 static const struct i2c_device_id wm8731_i2c_id[] = { 750 { "wm8731", 0 }, 751 { } 752 }; 753 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 754 755 static struct i2c_driver wm8731_i2c_driver = { 756 .driver = { 757 .name = "wm8731", 758 .owner = THIS_MODULE, 759 .of_match_table = wm8731_of_match, 760 }, 761 .probe = wm8731_i2c_probe, 762 .remove = wm8731_i2c_remove, 763 .id_table = wm8731_i2c_id, 764 }; 765 #endif 766 767 static int __init wm8731_modinit(void) 768 { 769 int ret = 0; 770 #if IS_ENABLED(CONFIG_I2C) 771 ret = i2c_add_driver(&wm8731_i2c_driver); 772 if (ret != 0) { 773 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 774 ret); 775 } 776 #endif 777 #if defined(CONFIG_SPI_MASTER) 778 ret = spi_register_driver(&wm8731_spi_driver); 779 if (ret != 0) { 780 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 781 ret); 782 } 783 #endif 784 return ret; 785 } 786 module_init(wm8731_modinit); 787 788 static void __exit wm8731_exit(void) 789 { 790 #if IS_ENABLED(CONFIG_I2C) 791 i2c_del_driver(&wm8731_i2c_driver); 792 #endif 793 #if defined(CONFIG_SPI_MASTER) 794 spi_unregister_driver(&wm8731_spi_driver); 795 #endif 796 } 797 module_exit(wm8731_exit); 798 799 MODULE_DESCRIPTION("ASoC WM8731 driver"); 800 MODULE_AUTHOR("Richard Purdie"); 801 MODULE_LICENSE("GPL"); 802