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 <sound/core.h> 28 #include <sound/pcm.h> 29 #include <sound/pcm_params.h> 30 #include <sound/soc.h> 31 #include <sound/initval.h> 32 #include <sound/tlv.h> 33 34 #include "wm8731.h" 35 36 #define WM8731_NUM_SUPPLIES 4 37 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = { 38 "AVDD", 39 "HPVDD", 40 "DCVDD", 41 "DBVDD", 42 }; 43 44 /* codec private data */ 45 struct wm8731_priv { 46 struct regmap *regmap; 47 struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES]; 48 unsigned int sysclk; 49 int sysclk_type; 50 int playback_fs; 51 bool deemph; 52 }; 53 54 55 /* 56 * wm8731 register cache 57 */ 58 static const struct reg_default wm8731_reg_defaults[] = { 59 { 0, 0x0097 }, 60 { 1, 0x0097 }, 61 { 2, 0x0079 }, 62 { 3, 0x0079 }, 63 { 4, 0x000a }, 64 { 5, 0x0008 }, 65 { 6, 0x009f }, 66 { 7, 0x000a }, 67 { 8, 0x0000 }, 68 { 9, 0x0000 }, 69 }; 70 71 static bool wm8731_volatile(struct device *dev, unsigned int reg) 72 { 73 return reg == WM8731_RESET; 74 } 75 76 static bool wm8731_writeable(struct device *dev, unsigned int reg) 77 { 78 return reg <= WM8731_RESET; 79 } 80 81 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0) 82 83 static const char *wm8731_input_select[] = {"Line In", "Mic"}; 84 85 static const struct soc_enum wm8731_insel_enum = 86 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select); 87 88 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 }; 89 90 static int wm8731_set_deemph(struct snd_soc_codec *codec) 91 { 92 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 93 int val, i, best; 94 95 /* If we're using deemphasis select the nearest available sample 96 * rate. 97 */ 98 if (wm8731->deemph) { 99 best = 1; 100 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) { 101 if (abs(wm8731_deemph[i] - wm8731->playback_fs) < 102 abs(wm8731_deemph[best] - wm8731->playback_fs)) 103 best = i; 104 } 105 106 val = best << 1; 107 } else { 108 best = 0; 109 val = 0; 110 } 111 112 dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n", 113 best, wm8731_deemph[best]); 114 115 return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val); 116 } 117 118 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol, 119 struct snd_ctl_elem_value *ucontrol) 120 { 121 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 122 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 123 124 ucontrol->value.enumerated.item[0] = wm8731->deemph; 125 126 return 0; 127 } 128 129 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol, 130 struct snd_ctl_elem_value *ucontrol) 131 { 132 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 133 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 134 int deemph = ucontrol->value.enumerated.item[0]; 135 int ret = 0; 136 137 if (deemph > 1) 138 return -EINVAL; 139 140 mutex_lock(&codec->mutex); 141 if (wm8731->deemph != deemph) { 142 wm8731->deemph = deemph; 143 144 wm8731_set_deemph(codec); 145 146 ret = 1; 147 } 148 mutex_unlock(&codec->mutex); 149 150 return ret; 151 } 152 153 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 154 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 155 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 156 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0); 157 158 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 159 160 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 161 0, 127, 0, out_tlv), 162 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 163 7, 1, 0), 164 165 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 166 in_tlv), 167 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 168 169 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv), 170 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 171 172 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 173 sidetone_tlv), 174 175 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 176 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 177 178 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0, 179 wm8731_get_deemph, wm8731_put_deemph), 180 }; 181 182 /* Output Mixer */ 183 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 184 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 185 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 186 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 187 }; 188 189 /* Input mux */ 190 static const struct snd_kcontrol_new wm8731_input_mux_controls = 191 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum); 192 193 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 194 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0), 195 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), 196 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 197 &wm8731_output_mixer_controls[0], 198 ARRAY_SIZE(wm8731_output_mixer_controls)), 199 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 200 SND_SOC_DAPM_OUTPUT("LOUT"), 201 SND_SOC_DAPM_OUTPUT("LHPOUT"), 202 SND_SOC_DAPM_OUTPUT("ROUT"), 203 SND_SOC_DAPM_OUTPUT("RHPOUT"), 204 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 205 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 206 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 207 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 208 SND_SOC_DAPM_INPUT("MICIN"), 209 SND_SOC_DAPM_INPUT("RLINEIN"), 210 SND_SOC_DAPM_INPUT("LLINEIN"), 211 }; 212 213 static int wm8731_check_osc(struct snd_soc_dapm_widget *source, 214 struct snd_soc_dapm_widget *sink) 215 { 216 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec); 217 218 return wm8731->sysclk_type == WM8731_SYSCLK_XTAL; 219 } 220 221 static const struct snd_soc_dapm_route wm8731_intercon[] = { 222 {"DAC", NULL, "OSC", wm8731_check_osc}, 223 {"ADC", NULL, "OSC", wm8731_check_osc}, 224 {"DAC", NULL, "ACTIVE"}, 225 {"ADC", NULL, "ACTIVE"}, 226 227 /* output mixer */ 228 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 229 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 230 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 231 232 /* outputs */ 233 {"RHPOUT", NULL, "Output Mixer"}, 234 {"ROUT", NULL, "Output Mixer"}, 235 {"LHPOUT", NULL, "Output Mixer"}, 236 {"LOUT", NULL, "Output Mixer"}, 237 238 /* input mux */ 239 {"Input Mux", "Line In", "Line Input"}, 240 {"Input Mux", "Mic", "Mic Bias"}, 241 {"ADC", NULL, "Input Mux"}, 242 243 /* inputs */ 244 {"Line Input", NULL, "LLINEIN"}, 245 {"Line Input", NULL, "RLINEIN"}, 246 {"Mic Bias", NULL, "MICIN"}, 247 }; 248 249 struct _coeff_div { 250 u32 mclk; 251 u32 rate; 252 u16 fs; 253 u8 sr:4; 254 u8 bosr:1; 255 u8 usb:1; 256 }; 257 258 /* codec mclk clock divider coefficients */ 259 static const struct _coeff_div coeff_div[] = { 260 /* 48k */ 261 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 262 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 263 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 264 265 /* 32k */ 266 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 267 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 268 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 269 270 /* 8k */ 271 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 272 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 273 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 274 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 275 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 276 277 /* 96k */ 278 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 279 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 280 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 281 282 /* 44.1k */ 283 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 284 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 285 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 286 287 /* 88.2k */ 288 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 289 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 290 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 291 }; 292 293 static inline int get_coeff(int mclk, int rate) 294 { 295 int i; 296 297 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 298 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 299 return i; 300 } 301 return 0; 302 } 303 304 static int wm8731_hw_params(struct snd_pcm_substream *substream, 305 struct snd_pcm_hw_params *params, 306 struct snd_soc_dai *dai) 307 { 308 struct snd_soc_codec *codec = dai->codec; 309 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 310 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 311 int i = get_coeff(wm8731->sysclk, params_rate(params)); 312 u16 srate = (coeff_div[i].sr << 2) | 313 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 314 315 wm8731->playback_fs = params_rate(params); 316 317 snd_soc_write(codec, WM8731_SRATE, srate); 318 319 /* bit size */ 320 switch (params_format(params)) { 321 case SNDRV_PCM_FORMAT_S16_LE: 322 break; 323 case SNDRV_PCM_FORMAT_S20_3LE: 324 iface |= 0x0004; 325 break; 326 case SNDRV_PCM_FORMAT_S24_LE: 327 iface |= 0x0008; 328 break; 329 } 330 331 wm8731_set_deemph(codec); 332 333 snd_soc_write(codec, WM8731_IFACE, iface); 334 return 0; 335 } 336 337 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 338 { 339 struct snd_soc_codec *codec = dai->codec; 340 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 341 342 if (mute) 343 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 344 else 345 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 346 return 0; 347 } 348 349 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 350 int clk_id, unsigned int freq, int dir) 351 { 352 struct snd_soc_codec *codec = codec_dai->codec; 353 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 354 355 switch (clk_id) { 356 case WM8731_SYSCLK_XTAL: 357 case WM8731_SYSCLK_MCLK: 358 wm8731->sysclk_type = clk_id; 359 break; 360 default: 361 return -EINVAL; 362 } 363 364 switch (freq) { 365 case 11289600: 366 case 12000000: 367 case 12288000: 368 case 16934400: 369 case 18432000: 370 wm8731->sysclk = freq; 371 break; 372 default: 373 return -EINVAL; 374 } 375 376 snd_soc_dapm_sync(&codec->dapm); 377 378 return 0; 379 } 380 381 382 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 383 unsigned int fmt) 384 { 385 struct snd_soc_codec *codec = codec_dai->codec; 386 u16 iface = 0; 387 388 /* set master/slave audio interface */ 389 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 390 case SND_SOC_DAIFMT_CBM_CFM: 391 iface |= 0x0040; 392 break; 393 case SND_SOC_DAIFMT_CBS_CFS: 394 break; 395 default: 396 return -EINVAL; 397 } 398 399 /* interface format */ 400 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 401 case SND_SOC_DAIFMT_I2S: 402 iface |= 0x0002; 403 break; 404 case SND_SOC_DAIFMT_RIGHT_J: 405 break; 406 case SND_SOC_DAIFMT_LEFT_J: 407 iface |= 0x0001; 408 break; 409 case SND_SOC_DAIFMT_DSP_A: 410 iface |= 0x0003; 411 break; 412 case SND_SOC_DAIFMT_DSP_B: 413 iface |= 0x0013; 414 break; 415 default: 416 return -EINVAL; 417 } 418 419 /* clock inversion */ 420 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 421 case SND_SOC_DAIFMT_NB_NF: 422 break; 423 case SND_SOC_DAIFMT_IB_IF: 424 iface |= 0x0090; 425 break; 426 case SND_SOC_DAIFMT_IB_NF: 427 iface |= 0x0080; 428 break; 429 case SND_SOC_DAIFMT_NB_IF: 430 iface |= 0x0010; 431 break; 432 default: 433 return -EINVAL; 434 } 435 436 /* set iface */ 437 snd_soc_write(codec, WM8731_IFACE, iface); 438 return 0; 439 } 440 441 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 442 enum snd_soc_bias_level level) 443 { 444 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 445 int ret; 446 u16 reg; 447 448 switch (level) { 449 case SND_SOC_BIAS_ON: 450 break; 451 case SND_SOC_BIAS_PREPARE: 452 break; 453 case SND_SOC_BIAS_STANDBY: 454 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 455 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 456 wm8731->supplies); 457 if (ret != 0) 458 return ret; 459 460 regcache_sync(wm8731->regmap); 461 } 462 463 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 464 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 465 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 466 break; 467 case SND_SOC_BIAS_OFF: 468 snd_soc_write(codec, WM8731_PWR, 0xffff); 469 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 470 wm8731->supplies); 471 regcache_mark_dirty(wm8731->regmap); 472 break; 473 } 474 codec->dapm.bias_level = level; 475 return 0; 476 } 477 478 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 479 480 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 481 SNDRV_PCM_FMTBIT_S24_LE) 482 483 static const struct snd_soc_dai_ops wm8731_dai_ops = { 484 .hw_params = wm8731_hw_params, 485 .digital_mute = wm8731_mute, 486 .set_sysclk = wm8731_set_dai_sysclk, 487 .set_fmt = wm8731_set_dai_fmt, 488 }; 489 490 static struct snd_soc_dai_driver wm8731_dai = { 491 .name = "wm8731-hifi", 492 .playback = { 493 .stream_name = "Playback", 494 .channels_min = 1, 495 .channels_max = 2, 496 .rates = WM8731_RATES, 497 .formats = WM8731_FORMATS,}, 498 .capture = { 499 .stream_name = "Capture", 500 .channels_min = 1, 501 .channels_max = 2, 502 .rates = WM8731_RATES, 503 .formats = WM8731_FORMATS,}, 504 .ops = &wm8731_dai_ops, 505 .symmetric_rates = 1, 506 }; 507 508 #ifdef CONFIG_PM 509 static int wm8731_suspend(struct snd_soc_codec *codec) 510 { 511 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 512 513 return 0; 514 } 515 516 static int wm8731_resume(struct snd_soc_codec *codec) 517 { 518 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 519 520 return 0; 521 } 522 #else 523 #define wm8731_suspend NULL 524 #define wm8731_resume NULL 525 #endif 526 527 static int wm8731_probe(struct snd_soc_codec *codec) 528 { 529 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 530 int ret = 0, i; 531 532 codec->control_data = wm8731->regmap; 533 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP); 534 if (ret < 0) { 535 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 536 return ret; 537 } 538 539 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 540 wm8731->supplies[i].supply = wm8731_supply_names[i]; 541 542 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 543 wm8731->supplies); 544 if (ret != 0) { 545 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 546 return ret; 547 } 548 549 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 550 wm8731->supplies); 551 if (ret != 0) { 552 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 553 goto err_regulator_get; 554 } 555 556 ret = wm8731_reset(codec); 557 if (ret < 0) { 558 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 559 goto err_regulator_enable; 560 } 561 562 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 563 564 /* Latch the update bits */ 565 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 566 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 567 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 568 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 569 570 /* Disable bypass path by default */ 571 snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0); 572 573 /* Regulators will have been enabled by bias management */ 574 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 575 576 return 0; 577 578 err_regulator_enable: 579 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 580 err_regulator_get: 581 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 582 583 return ret; 584 } 585 586 /* power down chip */ 587 static int wm8731_remove(struct snd_soc_codec *codec) 588 { 589 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 590 591 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 592 593 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 594 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 595 596 return 0; 597 } 598 599 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = { 600 .probe = wm8731_probe, 601 .remove = wm8731_remove, 602 .suspend = wm8731_suspend, 603 .resume = wm8731_resume, 604 .set_bias_level = wm8731_set_bias_level, 605 .dapm_widgets = wm8731_dapm_widgets, 606 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), 607 .dapm_routes = wm8731_intercon, 608 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon), 609 .controls = wm8731_snd_controls, 610 .num_controls = ARRAY_SIZE(wm8731_snd_controls), 611 }; 612 613 static const struct of_device_id wm8731_of_match[] = { 614 { .compatible = "wlf,wm8731", }, 615 { } 616 }; 617 618 MODULE_DEVICE_TABLE(of, wm8731_of_match); 619 620 static const struct regmap_config wm8731_regmap = { 621 .reg_bits = 7, 622 .val_bits = 9, 623 624 .max_register = WM8731_RESET, 625 .volatile_reg = wm8731_volatile, 626 .writeable_reg = wm8731_writeable, 627 628 .cache_type = REGCACHE_RBTREE, 629 .reg_defaults = wm8731_reg_defaults, 630 .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults), 631 }; 632 633 #if defined(CONFIG_SPI_MASTER) 634 static int wm8731_spi_probe(struct spi_device *spi) 635 { 636 struct wm8731_priv *wm8731; 637 int ret; 638 639 wm8731 = devm_kzalloc(&spi->dev, sizeof(struct wm8731_priv), 640 GFP_KERNEL); 641 if (wm8731 == NULL) 642 return -ENOMEM; 643 644 wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap); 645 if (IS_ERR(wm8731->regmap)) { 646 ret = PTR_ERR(wm8731->regmap); 647 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 648 ret); 649 return ret; 650 } 651 652 spi_set_drvdata(spi, wm8731); 653 654 ret = snd_soc_register_codec(&spi->dev, 655 &soc_codec_dev_wm8731, &wm8731_dai, 1); 656 if (ret != 0) { 657 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret); 658 return ret; 659 } 660 661 return 0; 662 } 663 664 static int wm8731_spi_remove(struct spi_device *spi) 665 { 666 snd_soc_unregister_codec(&spi->dev); 667 return 0; 668 } 669 670 static struct spi_driver wm8731_spi_driver = { 671 .driver = { 672 .name = "wm8731", 673 .owner = THIS_MODULE, 674 .of_match_table = wm8731_of_match, 675 }, 676 .probe = wm8731_spi_probe, 677 .remove = wm8731_spi_remove, 678 }; 679 #endif /* CONFIG_SPI_MASTER */ 680 681 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 682 static int wm8731_i2c_probe(struct i2c_client *i2c, 683 const struct i2c_device_id *id) 684 { 685 struct wm8731_priv *wm8731; 686 int ret; 687 688 wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv), 689 GFP_KERNEL); 690 if (wm8731 == NULL) 691 return -ENOMEM; 692 693 wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap); 694 if (IS_ERR(wm8731->regmap)) { 695 ret = PTR_ERR(wm8731->regmap); 696 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 697 ret); 698 return ret; 699 } 700 701 i2c_set_clientdata(i2c, wm8731); 702 703 ret = snd_soc_register_codec(&i2c->dev, 704 &soc_codec_dev_wm8731, &wm8731_dai, 1); 705 if (ret != 0) { 706 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); 707 return ret; 708 } 709 710 return 0; 711 } 712 713 static int wm8731_i2c_remove(struct i2c_client *client) 714 { 715 snd_soc_unregister_codec(&client->dev); 716 return 0; 717 } 718 719 static const struct i2c_device_id wm8731_i2c_id[] = { 720 { "wm8731", 0 }, 721 { } 722 }; 723 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 724 725 static struct i2c_driver wm8731_i2c_driver = { 726 .driver = { 727 .name = "wm8731", 728 .owner = THIS_MODULE, 729 .of_match_table = wm8731_of_match, 730 }, 731 .probe = wm8731_i2c_probe, 732 .remove = wm8731_i2c_remove, 733 .id_table = wm8731_i2c_id, 734 }; 735 #endif 736 737 static int __init wm8731_modinit(void) 738 { 739 int ret = 0; 740 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 741 ret = i2c_add_driver(&wm8731_i2c_driver); 742 if (ret != 0) { 743 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 744 ret); 745 } 746 #endif 747 #if defined(CONFIG_SPI_MASTER) 748 ret = spi_register_driver(&wm8731_spi_driver); 749 if (ret != 0) { 750 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 751 ret); 752 } 753 #endif 754 return ret; 755 } 756 module_init(wm8731_modinit); 757 758 static void __exit wm8731_exit(void) 759 { 760 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 761 i2c_del_driver(&wm8731_i2c_driver); 762 #endif 763 #if defined(CONFIG_SPI_MASTER) 764 spi_unregister_driver(&wm8731_spi_driver); 765 #endif 766 } 767 module_exit(wm8731_exit); 768 769 MODULE_DESCRIPTION("ASoC WM8731 driver"); 770 MODULE_AUTHOR("Richard Purdie"); 771 MODULE_LICENSE("GPL"); 772