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/platform_device.h> 23 #include <linux/regulator/consumer.h> 24 #include <linux/spi/spi.h> 25 #include <sound/core.h> 26 #include <sound/pcm.h> 27 #include <sound/pcm_params.h> 28 #include <sound/soc.h> 29 #include <sound/initval.h> 30 #include <sound/tlv.h> 31 32 #include "wm8731.h" 33 34 #define WM8731_NUM_SUPPLIES 4 35 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = { 36 "AVDD", 37 "HPVDD", 38 "DCVDD", 39 "DBVDD", 40 }; 41 42 /* codec private data */ 43 struct wm8731_priv { 44 enum snd_soc_control_type control_type; 45 struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES]; 46 unsigned int sysclk; 47 int sysclk_type; 48 int playback_fs; 49 bool deemph; 50 }; 51 52 53 /* 54 * wm8731 register cache 55 * We can't read the WM8731 register space when we are 56 * using 2 wire for device control, so we cache them instead. 57 * There is no point in caching the reset register 58 */ 59 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = { 60 0x0097, 0x0097, 0x0079, 0x0079, 61 0x000a, 0x0008, 0x009f, 0x000a, 62 0x0000, 0x0000 63 }; 64 65 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0) 66 67 static const char *wm8731_input_select[] = {"Line In", "Mic"}; 68 69 static const struct soc_enum wm8731_insel_enum = 70 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select); 71 72 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 }; 73 74 static int wm8731_set_deemph(struct snd_soc_codec *codec) 75 { 76 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 77 int val, i, best; 78 79 /* If we're using deemphasis select the nearest available sample 80 * rate. 81 */ 82 if (wm8731->deemph) { 83 best = 1; 84 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) { 85 if (abs(wm8731_deemph[i] - wm8731->playback_fs) < 86 abs(wm8731_deemph[best] - wm8731->playback_fs)) 87 best = i; 88 } 89 90 val = best << 1; 91 } else { 92 best = 0; 93 val = 0; 94 } 95 96 dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n", 97 best, wm8731_deemph[best]); 98 99 return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val); 100 } 101 102 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol, 103 struct snd_ctl_elem_value *ucontrol) 104 { 105 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 106 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 107 108 ucontrol->value.enumerated.item[0] = wm8731->deemph; 109 110 return 0; 111 } 112 113 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol, 114 struct snd_ctl_elem_value *ucontrol) 115 { 116 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 117 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 118 int deemph = ucontrol->value.enumerated.item[0]; 119 int ret = 0; 120 121 if (deemph > 1) 122 return -EINVAL; 123 124 mutex_lock(&codec->mutex); 125 if (wm8731->deemph != deemph) { 126 wm8731->deemph = deemph; 127 128 wm8731_set_deemph(codec); 129 130 ret = 1; 131 } 132 mutex_unlock(&codec->mutex); 133 134 return ret; 135 } 136 137 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 138 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 139 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 140 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0); 141 142 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 143 144 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 145 0, 127, 0, out_tlv), 146 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 147 7, 1, 0), 148 149 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 150 in_tlv), 151 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 152 153 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv), 154 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 155 156 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 157 sidetone_tlv), 158 159 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 160 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 161 162 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0, 163 wm8731_get_deemph, wm8731_put_deemph), 164 }; 165 166 /* Output Mixer */ 167 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 168 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 169 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 170 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 171 }; 172 173 /* Input mux */ 174 static const struct snd_kcontrol_new wm8731_input_mux_controls = 175 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum); 176 177 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 178 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), 179 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 180 &wm8731_output_mixer_controls[0], 181 ARRAY_SIZE(wm8731_output_mixer_controls)), 182 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 183 SND_SOC_DAPM_OUTPUT("LOUT"), 184 SND_SOC_DAPM_OUTPUT("LHPOUT"), 185 SND_SOC_DAPM_OUTPUT("ROUT"), 186 SND_SOC_DAPM_OUTPUT("RHPOUT"), 187 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 188 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 189 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 190 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 191 SND_SOC_DAPM_INPUT("MICIN"), 192 SND_SOC_DAPM_INPUT("RLINEIN"), 193 SND_SOC_DAPM_INPUT("LLINEIN"), 194 }; 195 196 static int wm8731_check_osc(struct snd_soc_dapm_widget *source, 197 struct snd_soc_dapm_widget *sink) 198 { 199 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec); 200 201 return wm8731->sysclk_type == WM8731_SYSCLK_MCLK; 202 } 203 204 static const struct snd_soc_dapm_route wm8731_intercon[] = { 205 {"DAC", NULL, "OSC", wm8731_check_osc}, 206 {"ADC", NULL, "OSC", wm8731_check_osc}, 207 208 /* output mixer */ 209 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 210 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 211 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 212 213 /* outputs */ 214 {"RHPOUT", NULL, "Output Mixer"}, 215 {"ROUT", NULL, "Output Mixer"}, 216 {"LHPOUT", NULL, "Output Mixer"}, 217 {"LOUT", NULL, "Output Mixer"}, 218 219 /* input mux */ 220 {"Input Mux", "Line In", "Line Input"}, 221 {"Input Mux", "Mic", "Mic Bias"}, 222 {"ADC", NULL, "Input Mux"}, 223 224 /* inputs */ 225 {"Line Input", NULL, "LLINEIN"}, 226 {"Line Input", NULL, "RLINEIN"}, 227 {"Mic Bias", NULL, "MICIN"}, 228 }; 229 230 struct _coeff_div { 231 u32 mclk; 232 u32 rate; 233 u16 fs; 234 u8 sr:4; 235 u8 bosr:1; 236 u8 usb:1; 237 }; 238 239 /* codec mclk clock divider coefficients */ 240 static const struct _coeff_div coeff_div[] = { 241 /* 48k */ 242 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 243 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 244 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 245 246 /* 32k */ 247 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 248 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 249 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 250 251 /* 8k */ 252 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 253 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 254 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 255 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 256 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 257 258 /* 96k */ 259 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 260 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 261 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 262 263 /* 44.1k */ 264 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 265 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 266 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 267 268 /* 88.2k */ 269 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 270 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 271 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 272 }; 273 274 static inline int get_coeff(int mclk, int rate) 275 { 276 int i; 277 278 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 279 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 280 return i; 281 } 282 return 0; 283 } 284 285 static int wm8731_hw_params(struct snd_pcm_substream *substream, 286 struct snd_pcm_hw_params *params, 287 struct snd_soc_dai *dai) 288 { 289 struct snd_soc_codec *codec = dai->codec; 290 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 291 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 292 int i = get_coeff(wm8731->sysclk, params_rate(params)); 293 u16 srate = (coeff_div[i].sr << 2) | 294 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 295 296 wm8731->playback_fs = params_rate(params); 297 298 snd_soc_write(codec, WM8731_SRATE, srate); 299 300 /* bit size */ 301 switch (params_format(params)) { 302 case SNDRV_PCM_FORMAT_S16_LE: 303 break; 304 case SNDRV_PCM_FORMAT_S20_3LE: 305 iface |= 0x0004; 306 break; 307 case SNDRV_PCM_FORMAT_S24_LE: 308 iface |= 0x0008; 309 break; 310 } 311 312 wm8731_set_deemph(codec); 313 314 snd_soc_write(codec, WM8731_IFACE, iface); 315 return 0; 316 } 317 318 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream, 319 struct snd_soc_dai *dai) 320 { 321 struct snd_soc_codec *codec = dai->codec; 322 323 /* set active */ 324 snd_soc_write(codec, WM8731_ACTIVE, 0x0001); 325 326 return 0; 327 } 328 329 static void wm8731_shutdown(struct snd_pcm_substream *substream, 330 struct snd_soc_dai *dai) 331 { 332 struct snd_soc_codec *codec = dai->codec; 333 334 /* deactivate */ 335 if (!codec->active) { 336 udelay(50); 337 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 338 } 339 } 340 341 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 342 { 343 struct snd_soc_codec *codec = dai->codec; 344 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 345 346 if (mute) 347 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 348 else 349 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 350 return 0; 351 } 352 353 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 354 int clk_id, unsigned int freq, int dir) 355 { 356 struct snd_soc_codec *codec = codec_dai->codec; 357 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 358 359 switch (clk_id) { 360 case WM8731_SYSCLK_XTAL: 361 case WM8731_SYSCLK_MCLK: 362 wm8731->sysclk_type = clk_id; 363 break; 364 default: 365 return -EINVAL; 366 } 367 368 switch (freq) { 369 case 11289600: 370 case 12000000: 371 case 12288000: 372 case 16934400: 373 case 18432000: 374 wm8731->sysclk = freq; 375 break; 376 default: 377 return -EINVAL; 378 } 379 380 snd_soc_dapm_sync(&codec->dapm); 381 382 return 0; 383 } 384 385 386 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 387 unsigned int fmt) 388 { 389 struct snd_soc_codec *codec = codec_dai->codec; 390 u16 iface = 0; 391 392 /* set master/slave audio interface */ 393 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 394 case SND_SOC_DAIFMT_CBM_CFM: 395 iface |= 0x0040; 396 break; 397 case SND_SOC_DAIFMT_CBS_CFS: 398 break; 399 default: 400 return -EINVAL; 401 } 402 403 /* interface format */ 404 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 405 case SND_SOC_DAIFMT_I2S: 406 iface |= 0x0002; 407 break; 408 case SND_SOC_DAIFMT_RIGHT_J: 409 break; 410 case SND_SOC_DAIFMT_LEFT_J: 411 iface |= 0x0001; 412 break; 413 case SND_SOC_DAIFMT_DSP_A: 414 iface |= 0x0003; 415 break; 416 case SND_SOC_DAIFMT_DSP_B: 417 iface |= 0x0013; 418 break; 419 default: 420 return -EINVAL; 421 } 422 423 /* clock inversion */ 424 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 425 case SND_SOC_DAIFMT_NB_NF: 426 break; 427 case SND_SOC_DAIFMT_IB_IF: 428 iface |= 0x0090; 429 break; 430 case SND_SOC_DAIFMT_IB_NF: 431 iface |= 0x0080; 432 break; 433 case SND_SOC_DAIFMT_NB_IF: 434 iface |= 0x0010; 435 break; 436 default: 437 return -EINVAL; 438 } 439 440 /* set iface */ 441 snd_soc_write(codec, WM8731_IFACE, iface); 442 return 0; 443 } 444 445 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 446 enum snd_soc_bias_level level) 447 { 448 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 449 int i, ret; 450 u8 data[2]; 451 u16 *cache = codec->reg_cache; 452 u16 reg; 453 454 switch (level) { 455 case SND_SOC_BIAS_ON: 456 break; 457 case SND_SOC_BIAS_PREPARE: 458 break; 459 case SND_SOC_BIAS_STANDBY: 460 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 461 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 462 wm8731->supplies); 463 if (ret != 0) 464 return ret; 465 466 /* Sync reg_cache with the hardware */ 467 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) { 468 if (cache[i] == wm8731_reg[i]) 469 continue; 470 471 data[0] = (i << 1) | ((cache[i] >> 8) 472 & 0x0001); 473 data[1] = cache[i] & 0x00ff; 474 codec->hw_write(codec->control_data, data, 2); 475 } 476 } 477 478 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 479 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 480 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 481 break; 482 case SND_SOC_BIAS_OFF: 483 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 484 snd_soc_write(codec, WM8731_PWR, 0xffff); 485 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 486 wm8731->supplies); 487 break; 488 } 489 codec->dapm.bias_level = level; 490 return 0; 491 } 492 493 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 494 495 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 496 SNDRV_PCM_FMTBIT_S24_LE) 497 498 static struct snd_soc_dai_ops wm8731_dai_ops = { 499 .prepare = wm8731_pcm_prepare, 500 .hw_params = wm8731_hw_params, 501 .shutdown = wm8731_shutdown, 502 .digital_mute = wm8731_mute, 503 .set_sysclk = wm8731_set_dai_sysclk, 504 .set_fmt = wm8731_set_dai_fmt, 505 }; 506 507 static struct snd_soc_dai_driver wm8731_dai = { 508 .name = "wm8731-hifi", 509 .playback = { 510 .stream_name = "Playback", 511 .channels_min = 1, 512 .channels_max = 2, 513 .rates = WM8731_RATES, 514 .formats = WM8731_FORMATS,}, 515 .capture = { 516 .stream_name = "Capture", 517 .channels_min = 1, 518 .channels_max = 2, 519 .rates = WM8731_RATES, 520 .formats = WM8731_FORMATS,}, 521 .ops = &wm8731_dai_ops, 522 .symmetric_rates = 1, 523 }; 524 525 #ifdef CONFIG_PM 526 static int wm8731_suspend(struct snd_soc_codec *codec, pm_message_t state) 527 { 528 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 529 530 return 0; 531 } 532 533 static int wm8731_resume(struct snd_soc_codec *codec) 534 { 535 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 536 537 return 0; 538 } 539 #else 540 #define wm8731_suspend NULL 541 #define wm8731_resume NULL 542 #endif 543 544 static int wm8731_probe(struct snd_soc_codec *codec) 545 { 546 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 547 int ret = 0, i; 548 549 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8731->control_type); 550 if (ret < 0) { 551 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 552 return ret; 553 } 554 555 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 556 wm8731->supplies[i].supply = wm8731_supply_names[i]; 557 558 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 559 wm8731->supplies); 560 if (ret != 0) { 561 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 562 return ret; 563 } 564 565 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 566 wm8731->supplies); 567 if (ret != 0) { 568 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 569 goto err_regulator_get; 570 } 571 572 ret = wm8731_reset(codec); 573 if (ret < 0) { 574 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 575 goto err_regulator_enable; 576 } 577 578 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 579 580 /* Latch the update bits */ 581 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 582 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 583 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 584 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 585 586 /* Disable bypass path by default */ 587 snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0); 588 589 snd_soc_add_controls(codec, wm8731_snd_controls, 590 ARRAY_SIZE(wm8731_snd_controls)); 591 592 /* Regulators will have been enabled by bias management */ 593 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 594 595 return 0; 596 597 err_regulator_enable: 598 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 599 err_regulator_get: 600 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 601 602 return ret; 603 } 604 605 /* power down chip */ 606 static int wm8731_remove(struct snd_soc_codec *codec) 607 { 608 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 609 610 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 611 612 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 613 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 614 615 return 0; 616 } 617 618 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = { 619 .probe = wm8731_probe, 620 .remove = wm8731_remove, 621 .suspend = wm8731_suspend, 622 .resume = wm8731_resume, 623 .set_bias_level = wm8731_set_bias_level, 624 .reg_cache_size = ARRAY_SIZE(wm8731_reg), 625 .reg_word_size = sizeof(u16), 626 .reg_cache_default = wm8731_reg, 627 .dapm_widgets = wm8731_dapm_widgets, 628 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), 629 .dapm_routes = wm8731_intercon, 630 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon), 631 }; 632 633 #if defined(CONFIG_SPI_MASTER) 634 static int __devinit wm8731_spi_probe(struct spi_device *spi) 635 { 636 struct wm8731_priv *wm8731; 637 int ret; 638 639 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 640 if (wm8731 == NULL) 641 return -ENOMEM; 642 643 wm8731->control_type = SND_SOC_SPI; 644 spi_set_drvdata(spi, wm8731); 645 646 ret = snd_soc_register_codec(&spi->dev, 647 &soc_codec_dev_wm8731, &wm8731_dai, 1); 648 if (ret < 0) 649 kfree(wm8731); 650 return ret; 651 } 652 653 static int __devexit wm8731_spi_remove(struct spi_device *spi) 654 { 655 snd_soc_unregister_codec(&spi->dev); 656 kfree(spi_get_drvdata(spi)); 657 return 0; 658 } 659 660 static struct spi_driver wm8731_spi_driver = { 661 .driver = { 662 .name = "wm8731-codec", 663 .owner = THIS_MODULE, 664 }, 665 .probe = wm8731_spi_probe, 666 .remove = __devexit_p(wm8731_spi_remove), 667 }; 668 #endif /* CONFIG_SPI_MASTER */ 669 670 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 671 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c, 672 const struct i2c_device_id *id) 673 { 674 struct wm8731_priv *wm8731; 675 int ret; 676 677 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 678 if (wm8731 == NULL) 679 return -ENOMEM; 680 681 i2c_set_clientdata(i2c, wm8731); 682 wm8731->control_type = SND_SOC_I2C; 683 684 ret = snd_soc_register_codec(&i2c->dev, 685 &soc_codec_dev_wm8731, &wm8731_dai, 1); 686 if (ret < 0) 687 kfree(wm8731); 688 return ret; 689 } 690 691 static __devexit int wm8731_i2c_remove(struct i2c_client *client) 692 { 693 snd_soc_unregister_codec(&client->dev); 694 kfree(i2c_get_clientdata(client)); 695 return 0; 696 } 697 698 static const struct i2c_device_id wm8731_i2c_id[] = { 699 { "wm8731", 0 }, 700 { } 701 }; 702 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 703 704 static struct i2c_driver wm8731_i2c_driver = { 705 .driver = { 706 .name = "wm8731-codec", 707 .owner = THIS_MODULE, 708 }, 709 .probe = wm8731_i2c_probe, 710 .remove = __devexit_p(wm8731_i2c_remove), 711 .id_table = wm8731_i2c_id, 712 }; 713 #endif 714 715 static int __init wm8731_modinit(void) 716 { 717 int ret = 0; 718 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 719 ret = i2c_add_driver(&wm8731_i2c_driver); 720 if (ret != 0) { 721 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 722 ret); 723 } 724 #endif 725 #if defined(CONFIG_SPI_MASTER) 726 ret = spi_register_driver(&wm8731_spi_driver); 727 if (ret != 0) { 728 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 729 ret); 730 } 731 #endif 732 return ret; 733 } 734 module_init(wm8731_modinit); 735 736 static void __exit wm8731_exit(void) 737 { 738 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 739 i2c_del_driver(&wm8731_i2c_driver); 740 #endif 741 #if defined(CONFIG_SPI_MASTER) 742 spi_unregister_driver(&wm8731_spi_driver); 743 #endif 744 } 745 module_exit(wm8731_exit); 746 747 MODULE_DESCRIPTION("ASoC WM8731 driver"); 748 MODULE_AUTHOR("Richard Purdie"); 749 MODULE_LICENSE("GPL"); 750