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/slab.h> 22 #include <linux/regmap.h> 23 #include <linux/regulator/consumer.h> 24 #include <linux/spi/spi.h> 25 #include <linux/of_device.h> 26 #include <sound/core.h> 27 #include <sound/pcm.h> 28 #include <sound/pcm_params.h> 29 #include <sound/soc.h> 30 #include <sound/initval.h> 31 #include <sound/tlv.h> 32 33 #include "wm8731.h" 34 35 #define WM8731_NUM_SUPPLIES 4 36 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = { 37 "AVDD", 38 "HPVDD", 39 "DCVDD", 40 "DBVDD", 41 }; 42 43 /* codec private data */ 44 struct wm8731_priv { 45 struct regmap *regmap; 46 struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES]; 47 unsigned int sysclk; 48 int sysclk_type; 49 int playback_fs; 50 bool deemph; 51 }; 52 53 54 /* 55 * wm8731 register cache 56 */ 57 static const struct reg_default wm8731_reg_defaults[] = { 58 { 0, 0x0097 }, 59 { 1, 0x0097 }, 60 { 2, 0x0079 }, 61 { 3, 0x0079 }, 62 { 4, 0x000a }, 63 { 5, 0x0008 }, 64 { 6, 0x009f }, 65 { 7, 0x000a }, 66 { 8, 0x0000 }, 67 { 9, 0x0000 }, 68 }; 69 70 static bool wm8731_volatile(struct device *dev, unsigned int reg) 71 { 72 return reg == WM8731_RESET; 73 } 74 75 static bool wm8731_writeable(struct device *dev, unsigned int reg) 76 { 77 return reg <= WM8731_RESET; 78 } 79 80 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0) 81 82 static const char *wm8731_input_select[] = {"Line In", "Mic"}; 83 84 static const struct soc_enum wm8731_insel_enum = 85 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select); 86 87 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 }; 88 89 static int wm8731_set_deemph(struct snd_soc_codec *codec) 90 { 91 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 92 int val, i, best; 93 94 /* If we're using deemphasis select the nearest available sample 95 * rate. 96 */ 97 if (wm8731->deemph) { 98 best = 1; 99 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) { 100 if (abs(wm8731_deemph[i] - wm8731->playback_fs) < 101 abs(wm8731_deemph[best] - wm8731->playback_fs)) 102 best = i; 103 } 104 105 val = best << 1; 106 } else { 107 best = 0; 108 val = 0; 109 } 110 111 dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n", 112 best, wm8731_deemph[best]); 113 114 return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val); 115 } 116 117 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol, 118 struct snd_ctl_elem_value *ucontrol) 119 { 120 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 121 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 122 123 ucontrol->value.enumerated.item[0] = wm8731->deemph; 124 125 return 0; 126 } 127 128 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol, 129 struct snd_ctl_elem_value *ucontrol) 130 { 131 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 132 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 133 int deemph = ucontrol->value.enumerated.item[0]; 134 int ret = 0; 135 136 if (deemph > 1) 137 return -EINVAL; 138 139 mutex_lock(&codec->mutex); 140 if (wm8731->deemph != deemph) { 141 wm8731->deemph = deemph; 142 143 wm8731_set_deemph(codec); 144 145 ret = 1; 146 } 147 mutex_unlock(&codec->mutex); 148 149 return ret; 150 } 151 152 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 153 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 154 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 155 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0); 156 157 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 158 159 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 160 0, 127, 0, out_tlv), 161 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 162 7, 1, 0), 163 164 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 165 in_tlv), 166 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 167 168 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv), 169 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 170 171 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 172 sidetone_tlv), 173 174 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 175 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 176 177 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0, 178 wm8731_get_deemph, wm8731_put_deemph), 179 }; 180 181 /* Output Mixer */ 182 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 183 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 184 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 185 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 186 }; 187 188 /* Input mux */ 189 static const struct snd_kcontrol_new wm8731_input_mux_controls = 190 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum); 191 192 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 193 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0), 194 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), 195 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 196 &wm8731_output_mixer_controls[0], 197 ARRAY_SIZE(wm8731_output_mixer_controls)), 198 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 199 SND_SOC_DAPM_OUTPUT("LOUT"), 200 SND_SOC_DAPM_OUTPUT("LHPOUT"), 201 SND_SOC_DAPM_OUTPUT("ROUT"), 202 SND_SOC_DAPM_OUTPUT("RHPOUT"), 203 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 204 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 205 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 206 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 207 SND_SOC_DAPM_INPUT("MICIN"), 208 SND_SOC_DAPM_INPUT("RLINEIN"), 209 SND_SOC_DAPM_INPUT("LLINEIN"), 210 }; 211 212 static int wm8731_check_osc(struct snd_soc_dapm_widget *source, 213 struct snd_soc_dapm_widget *sink) 214 { 215 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec); 216 217 return wm8731->sysclk_type == WM8731_SYSCLK_XTAL; 218 } 219 220 static const struct snd_soc_dapm_route wm8731_intercon[] = { 221 {"DAC", NULL, "OSC", wm8731_check_osc}, 222 {"ADC", NULL, "OSC", wm8731_check_osc}, 223 {"DAC", NULL, "ACTIVE"}, 224 {"ADC", NULL, "ACTIVE"}, 225 226 /* output mixer */ 227 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 228 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 229 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 230 231 /* outputs */ 232 {"RHPOUT", NULL, "Output Mixer"}, 233 {"ROUT", NULL, "Output Mixer"}, 234 {"LHPOUT", NULL, "Output Mixer"}, 235 {"LOUT", NULL, "Output Mixer"}, 236 237 /* input mux */ 238 {"Input Mux", "Line In", "Line Input"}, 239 {"Input Mux", "Mic", "Mic Bias"}, 240 {"ADC", NULL, "Input Mux"}, 241 242 /* inputs */ 243 {"Line Input", NULL, "LLINEIN"}, 244 {"Line Input", NULL, "RLINEIN"}, 245 {"Mic Bias", NULL, "MICIN"}, 246 }; 247 248 struct _coeff_div { 249 u32 mclk; 250 u32 rate; 251 u16 fs; 252 u8 sr:4; 253 u8 bosr:1; 254 u8 usb:1; 255 }; 256 257 /* codec mclk clock divider coefficients */ 258 static const struct _coeff_div coeff_div[] = { 259 /* 48k */ 260 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 261 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 262 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 263 264 /* 32k */ 265 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 266 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 267 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 268 269 /* 8k */ 270 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 271 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 272 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 273 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 274 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 275 276 /* 96k */ 277 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 278 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 279 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 280 281 /* 44.1k */ 282 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 283 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 284 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 285 286 /* 88.2k */ 287 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 288 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 289 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 290 }; 291 292 static inline int get_coeff(int mclk, int rate) 293 { 294 int i; 295 296 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 297 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 298 return i; 299 } 300 return 0; 301 } 302 303 static int wm8731_hw_params(struct snd_pcm_substream *substream, 304 struct snd_pcm_hw_params *params, 305 struct snd_soc_dai *dai) 306 { 307 struct snd_soc_codec *codec = dai->codec; 308 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 309 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 310 int i = get_coeff(wm8731->sysclk, params_rate(params)); 311 u16 srate = (coeff_div[i].sr << 2) | 312 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 313 314 wm8731->playback_fs = params_rate(params); 315 316 snd_soc_write(codec, WM8731_SRATE, srate); 317 318 /* bit size */ 319 switch (params_format(params)) { 320 case SNDRV_PCM_FORMAT_S16_LE: 321 break; 322 case SNDRV_PCM_FORMAT_S20_3LE: 323 iface |= 0x0004; 324 break; 325 case SNDRV_PCM_FORMAT_S24_LE: 326 iface |= 0x0008; 327 break; 328 } 329 330 wm8731_set_deemph(codec); 331 332 snd_soc_write(codec, WM8731_IFACE, iface); 333 return 0; 334 } 335 336 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 337 { 338 struct snd_soc_codec *codec = dai->codec; 339 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 340 341 if (mute) 342 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 343 else 344 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 345 return 0; 346 } 347 348 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 349 int clk_id, unsigned int freq, int dir) 350 { 351 struct snd_soc_codec *codec = codec_dai->codec; 352 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 353 354 switch (clk_id) { 355 case WM8731_SYSCLK_XTAL: 356 case WM8731_SYSCLK_MCLK: 357 wm8731->sysclk_type = clk_id; 358 break; 359 default: 360 return -EINVAL; 361 } 362 363 switch (freq) { 364 case 11289600: 365 case 12000000: 366 case 12288000: 367 case 16934400: 368 case 18432000: 369 wm8731->sysclk = freq; 370 break; 371 default: 372 return -EINVAL; 373 } 374 375 snd_soc_dapm_sync(&codec->dapm); 376 377 return 0; 378 } 379 380 381 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 382 unsigned int fmt) 383 { 384 struct snd_soc_codec *codec = codec_dai->codec; 385 u16 iface = 0; 386 387 /* set master/slave audio interface */ 388 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 389 case SND_SOC_DAIFMT_CBM_CFM: 390 iface |= 0x0040; 391 break; 392 case SND_SOC_DAIFMT_CBS_CFS: 393 break; 394 default: 395 return -EINVAL; 396 } 397 398 /* interface format */ 399 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 400 case SND_SOC_DAIFMT_I2S: 401 iface |= 0x0002; 402 break; 403 case SND_SOC_DAIFMT_RIGHT_J: 404 break; 405 case SND_SOC_DAIFMT_LEFT_J: 406 iface |= 0x0001; 407 break; 408 case SND_SOC_DAIFMT_DSP_A: 409 iface |= 0x0003; 410 break; 411 case SND_SOC_DAIFMT_DSP_B: 412 iface |= 0x0013; 413 break; 414 default: 415 return -EINVAL; 416 } 417 418 /* clock inversion */ 419 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 420 case SND_SOC_DAIFMT_NB_NF: 421 break; 422 case SND_SOC_DAIFMT_IB_IF: 423 iface |= 0x0090; 424 break; 425 case SND_SOC_DAIFMT_IB_NF: 426 iface |= 0x0080; 427 break; 428 case SND_SOC_DAIFMT_NB_IF: 429 iface |= 0x0010; 430 break; 431 default: 432 return -EINVAL; 433 } 434 435 /* set iface */ 436 snd_soc_write(codec, WM8731_IFACE, iface); 437 return 0; 438 } 439 440 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 441 enum snd_soc_bias_level level) 442 { 443 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 444 int ret; 445 u16 reg; 446 447 switch (level) { 448 case SND_SOC_BIAS_ON: 449 break; 450 case SND_SOC_BIAS_PREPARE: 451 break; 452 case SND_SOC_BIAS_STANDBY: 453 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 454 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 455 wm8731->supplies); 456 if (ret != 0) 457 return ret; 458 459 regcache_sync(wm8731->regmap); 460 } 461 462 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 463 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 464 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 465 break; 466 case SND_SOC_BIAS_OFF: 467 snd_soc_write(codec, WM8731_PWR, 0xffff); 468 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 469 wm8731->supplies); 470 regcache_mark_dirty(wm8731->regmap); 471 break; 472 } 473 codec->dapm.bias_level = level; 474 return 0; 475 } 476 477 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 478 479 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 480 SNDRV_PCM_FMTBIT_S24_LE) 481 482 static const struct snd_soc_dai_ops wm8731_dai_ops = { 483 .hw_params = wm8731_hw_params, 484 .digital_mute = wm8731_mute, 485 .set_sysclk = wm8731_set_dai_sysclk, 486 .set_fmt = wm8731_set_dai_fmt, 487 }; 488 489 static struct snd_soc_dai_driver wm8731_dai = { 490 .name = "wm8731-hifi", 491 .playback = { 492 .stream_name = "Playback", 493 .channels_min = 1, 494 .channels_max = 2, 495 .rates = WM8731_RATES, 496 .formats = WM8731_FORMATS,}, 497 .capture = { 498 .stream_name = "Capture", 499 .channels_min = 1, 500 .channels_max = 2, 501 .rates = WM8731_RATES, 502 .formats = WM8731_FORMATS,}, 503 .ops = &wm8731_dai_ops, 504 .symmetric_rates = 1, 505 }; 506 507 #ifdef CONFIG_PM 508 static int wm8731_suspend(struct snd_soc_codec *codec) 509 { 510 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 511 512 return 0; 513 } 514 515 static int wm8731_resume(struct snd_soc_codec *codec) 516 { 517 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 518 519 return 0; 520 } 521 #else 522 #define wm8731_suspend NULL 523 #define wm8731_resume NULL 524 #endif 525 526 static int wm8731_probe(struct snd_soc_codec *codec) 527 { 528 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 529 int ret = 0, i; 530 531 codec->control_data = wm8731->regmap; 532 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP); 533 if (ret < 0) { 534 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 535 return ret; 536 } 537 538 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 539 wm8731->supplies[i].supply = wm8731_supply_names[i]; 540 541 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 542 wm8731->supplies); 543 if (ret != 0) { 544 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 545 return ret; 546 } 547 548 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 549 wm8731->supplies); 550 if (ret != 0) { 551 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 552 goto err_regulator_get; 553 } 554 555 ret = wm8731_reset(codec); 556 if (ret < 0) { 557 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 558 goto err_regulator_enable; 559 } 560 561 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 562 563 /* Latch the update bits */ 564 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 565 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 566 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 567 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 568 569 /* Disable bypass path by default */ 570 snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0); 571 572 /* Regulators will have been enabled by bias management */ 573 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 574 575 return 0; 576 577 err_regulator_enable: 578 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 579 err_regulator_get: 580 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 581 582 return ret; 583 } 584 585 /* power down chip */ 586 static int wm8731_remove(struct snd_soc_codec *codec) 587 { 588 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 589 590 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 591 592 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 593 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 594 595 return 0; 596 } 597 598 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = { 599 .probe = wm8731_probe, 600 .remove = wm8731_remove, 601 .suspend = wm8731_suspend, 602 .resume = wm8731_resume, 603 .set_bias_level = wm8731_set_bias_level, 604 .dapm_widgets = wm8731_dapm_widgets, 605 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), 606 .dapm_routes = wm8731_intercon, 607 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon), 608 .controls = wm8731_snd_controls, 609 .num_controls = ARRAY_SIZE(wm8731_snd_controls), 610 }; 611 612 static const struct of_device_id wm8731_of_match[] = { 613 { .compatible = "wlf,wm8731", }, 614 { } 615 }; 616 617 MODULE_DEVICE_TABLE(of, wm8731_of_match); 618 619 static const struct regmap_config wm8731_regmap = { 620 .reg_bits = 7, 621 .val_bits = 9, 622 623 .max_register = WM8731_RESET, 624 .volatile_reg = wm8731_volatile, 625 .writeable_reg = wm8731_writeable, 626 627 .cache_type = REGCACHE_RBTREE, 628 .reg_defaults = wm8731_reg_defaults, 629 .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults), 630 }; 631 632 #if defined(CONFIG_SPI_MASTER) 633 static int __devinit wm8731_spi_probe(struct spi_device *spi) 634 { 635 struct wm8731_priv *wm8731; 636 int ret; 637 638 wm8731 = devm_kzalloc(&spi->dev, sizeof(struct wm8731_priv), 639 GFP_KERNEL); 640 if (wm8731 == NULL) 641 return -ENOMEM; 642 643 wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap); 644 if (IS_ERR(wm8731->regmap)) { 645 ret = PTR_ERR(wm8731->regmap); 646 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 647 ret); 648 return ret; 649 } 650 651 spi_set_drvdata(spi, wm8731); 652 653 ret = snd_soc_register_codec(&spi->dev, 654 &soc_codec_dev_wm8731, &wm8731_dai, 1); 655 if (ret != 0) { 656 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret); 657 return ret; 658 } 659 660 return 0; 661 } 662 663 static int __devexit wm8731_spi_remove(struct spi_device *spi) 664 { 665 snd_soc_unregister_codec(&spi->dev); 666 return 0; 667 } 668 669 static struct spi_driver wm8731_spi_driver = { 670 .driver = { 671 .name = "wm8731", 672 .owner = THIS_MODULE, 673 .of_match_table = wm8731_of_match, 674 }, 675 .probe = wm8731_spi_probe, 676 .remove = __devexit_p(wm8731_spi_remove), 677 }; 678 #endif /* CONFIG_SPI_MASTER */ 679 680 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 681 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c, 682 const struct i2c_device_id *id) 683 { 684 struct wm8731_priv *wm8731; 685 int ret; 686 687 wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv), 688 GFP_KERNEL); 689 if (wm8731 == NULL) 690 return -ENOMEM; 691 692 wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap); 693 if (IS_ERR(wm8731->regmap)) { 694 ret = PTR_ERR(wm8731->regmap); 695 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 696 ret); 697 return ret; 698 } 699 700 i2c_set_clientdata(i2c, wm8731); 701 702 ret = snd_soc_register_codec(&i2c->dev, 703 &soc_codec_dev_wm8731, &wm8731_dai, 1); 704 if (ret != 0) { 705 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); 706 return ret; 707 } 708 709 return 0; 710 } 711 712 static __devexit int wm8731_i2c_remove(struct i2c_client *client) 713 { 714 snd_soc_unregister_codec(&client->dev); 715 return 0; 716 } 717 718 static const struct i2c_device_id wm8731_i2c_id[] = { 719 { "wm8731", 0 }, 720 { } 721 }; 722 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 723 724 static struct i2c_driver wm8731_i2c_driver = { 725 .driver = { 726 .name = "wm8731", 727 .owner = THIS_MODULE, 728 .of_match_table = wm8731_of_match, 729 }, 730 .probe = wm8731_i2c_probe, 731 .remove = __devexit_p(wm8731_i2c_remove), 732 .id_table = wm8731_i2c_id, 733 }; 734 #endif 735 736 static int __init wm8731_modinit(void) 737 { 738 int ret = 0; 739 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 740 ret = i2c_add_driver(&wm8731_i2c_driver); 741 if (ret != 0) { 742 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 743 ret); 744 } 745 #endif 746 #if defined(CONFIG_SPI_MASTER) 747 ret = spi_register_driver(&wm8731_spi_driver); 748 if (ret != 0) { 749 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 750 ret); 751 } 752 #endif 753 return ret; 754 } 755 module_init(wm8731_modinit); 756 757 static void __exit wm8731_exit(void) 758 { 759 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 760 i2c_del_driver(&wm8731_i2c_driver); 761 #endif 762 #if defined(CONFIG_SPI_MASTER) 763 spi_unregister_driver(&wm8731_spi_driver); 764 #endif 765 } 766 module_exit(wm8731_exit); 767 768 MODULE_DESCRIPTION("ASoC WM8731 driver"); 769 MODULE_AUTHOR("Richard Purdie"); 770 MODULE_LICENSE("GPL"); 771