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 <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 enum snd_soc_control_type control_type; 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 * We can't read the WM8731 register space when we are 57 * using 2 wire for device control, so we cache them instead. 58 * There is no point in caching the reset register 59 */ 60 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = { 61 0x0097, 0x0097, 0x0079, 0x0079, 62 0x000a, 0x0008, 0x009f, 0x000a, 63 0x0000, 0x0000 64 }; 65 66 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0) 67 68 static const char *wm8731_input_select[] = {"Line In", "Mic"}; 69 70 static const struct soc_enum wm8731_insel_enum = 71 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select); 72 73 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 }; 74 75 static int wm8731_set_deemph(struct snd_soc_codec *codec) 76 { 77 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 78 int val, i, best; 79 80 /* If we're using deemphasis select the nearest available sample 81 * rate. 82 */ 83 if (wm8731->deemph) { 84 best = 1; 85 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) { 86 if (abs(wm8731_deemph[i] - wm8731->playback_fs) < 87 abs(wm8731_deemph[best] - wm8731->playback_fs)) 88 best = i; 89 } 90 91 val = best << 1; 92 } else { 93 best = 0; 94 val = 0; 95 } 96 97 dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n", 98 best, wm8731_deemph[best]); 99 100 return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val); 101 } 102 103 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol, 104 struct snd_ctl_elem_value *ucontrol) 105 { 106 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 107 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 108 109 ucontrol->value.enumerated.item[0] = wm8731->deemph; 110 111 return 0; 112 } 113 114 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol, 115 struct snd_ctl_elem_value *ucontrol) 116 { 117 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 118 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 119 int deemph = ucontrol->value.enumerated.item[0]; 120 int ret = 0; 121 122 if (deemph > 1) 123 return -EINVAL; 124 125 mutex_lock(&codec->mutex); 126 if (wm8731->deemph != deemph) { 127 wm8731->deemph = deemph; 128 129 wm8731_set_deemph(codec); 130 131 ret = 1; 132 } 133 mutex_unlock(&codec->mutex); 134 135 return ret; 136 } 137 138 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 139 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 140 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 141 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0); 142 143 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 144 145 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 146 0, 127, 0, out_tlv), 147 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 148 7, 1, 0), 149 150 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 151 in_tlv), 152 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 153 154 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv), 155 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 156 157 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 158 sidetone_tlv), 159 160 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 161 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 162 163 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0, 164 wm8731_get_deemph, wm8731_put_deemph), 165 }; 166 167 /* Output Mixer */ 168 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 169 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 170 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 171 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 172 }; 173 174 /* Input mux */ 175 static const struct snd_kcontrol_new wm8731_input_mux_controls = 176 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum); 177 178 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 179 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0), 180 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), 181 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 182 &wm8731_output_mixer_controls[0], 183 ARRAY_SIZE(wm8731_output_mixer_controls)), 184 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 185 SND_SOC_DAPM_OUTPUT("LOUT"), 186 SND_SOC_DAPM_OUTPUT("LHPOUT"), 187 SND_SOC_DAPM_OUTPUT("ROUT"), 188 SND_SOC_DAPM_OUTPUT("RHPOUT"), 189 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 190 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 191 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 192 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 193 SND_SOC_DAPM_INPUT("MICIN"), 194 SND_SOC_DAPM_INPUT("RLINEIN"), 195 SND_SOC_DAPM_INPUT("LLINEIN"), 196 }; 197 198 static int wm8731_check_osc(struct snd_soc_dapm_widget *source, 199 struct snd_soc_dapm_widget *sink) 200 { 201 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec); 202 203 return wm8731->sysclk_type == WM8731_SYSCLK_XTAL; 204 } 205 206 static const struct snd_soc_dapm_route wm8731_intercon[] = { 207 {"DAC", NULL, "OSC", wm8731_check_osc}, 208 {"ADC", NULL, "OSC", wm8731_check_osc}, 209 {"DAC", NULL, "ACTIVE"}, 210 {"ADC", NULL, "ACTIVE"}, 211 212 /* output mixer */ 213 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 214 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 215 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 216 217 /* outputs */ 218 {"RHPOUT", NULL, "Output Mixer"}, 219 {"ROUT", NULL, "Output Mixer"}, 220 {"LHPOUT", NULL, "Output Mixer"}, 221 {"LOUT", NULL, "Output Mixer"}, 222 223 /* input mux */ 224 {"Input Mux", "Line In", "Line Input"}, 225 {"Input Mux", "Mic", "Mic Bias"}, 226 {"ADC", NULL, "Input Mux"}, 227 228 /* inputs */ 229 {"Line Input", NULL, "LLINEIN"}, 230 {"Line Input", NULL, "RLINEIN"}, 231 {"Mic Bias", NULL, "MICIN"}, 232 }; 233 234 struct _coeff_div { 235 u32 mclk; 236 u32 rate; 237 u16 fs; 238 u8 sr:4; 239 u8 bosr:1; 240 u8 usb:1; 241 }; 242 243 /* codec mclk clock divider coefficients */ 244 static const struct _coeff_div coeff_div[] = { 245 /* 48k */ 246 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 247 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 248 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 249 250 /* 32k */ 251 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 252 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 253 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 254 255 /* 8k */ 256 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 257 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 258 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 259 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 260 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 261 262 /* 96k */ 263 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 264 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 265 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 266 267 /* 44.1k */ 268 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 269 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 270 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 271 272 /* 88.2k */ 273 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 274 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 275 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 276 }; 277 278 static inline int get_coeff(int mclk, int rate) 279 { 280 int i; 281 282 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 283 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 284 return i; 285 } 286 return 0; 287 } 288 289 static int wm8731_hw_params(struct snd_pcm_substream *substream, 290 struct snd_pcm_hw_params *params, 291 struct snd_soc_dai *dai) 292 { 293 struct snd_soc_codec *codec = dai->codec; 294 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 295 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 296 int i = get_coeff(wm8731->sysclk, params_rate(params)); 297 u16 srate = (coeff_div[i].sr << 2) | 298 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 299 300 wm8731->playback_fs = params_rate(params); 301 302 snd_soc_write(codec, WM8731_SRATE, srate); 303 304 /* bit size */ 305 switch (params_format(params)) { 306 case SNDRV_PCM_FORMAT_S16_LE: 307 break; 308 case SNDRV_PCM_FORMAT_S20_3LE: 309 iface |= 0x0004; 310 break; 311 case SNDRV_PCM_FORMAT_S24_LE: 312 iface |= 0x0008; 313 break; 314 } 315 316 wm8731_set_deemph(codec); 317 318 snd_soc_write(codec, WM8731_IFACE, iface); 319 return 0; 320 } 321 322 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 323 { 324 struct snd_soc_codec *codec = dai->codec; 325 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 326 327 if (mute) 328 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 329 else 330 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 331 return 0; 332 } 333 334 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 335 int clk_id, unsigned int freq, int dir) 336 { 337 struct snd_soc_codec *codec = codec_dai->codec; 338 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 339 340 switch (clk_id) { 341 case WM8731_SYSCLK_XTAL: 342 case WM8731_SYSCLK_MCLK: 343 wm8731->sysclk_type = clk_id; 344 break; 345 default: 346 return -EINVAL; 347 } 348 349 switch (freq) { 350 case 11289600: 351 case 12000000: 352 case 12288000: 353 case 16934400: 354 case 18432000: 355 wm8731->sysclk = freq; 356 break; 357 default: 358 return -EINVAL; 359 } 360 361 snd_soc_dapm_sync(&codec->dapm); 362 363 return 0; 364 } 365 366 367 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 368 unsigned int fmt) 369 { 370 struct snd_soc_codec *codec = codec_dai->codec; 371 u16 iface = 0; 372 373 /* set master/slave audio interface */ 374 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 375 case SND_SOC_DAIFMT_CBM_CFM: 376 iface |= 0x0040; 377 break; 378 case SND_SOC_DAIFMT_CBS_CFS: 379 break; 380 default: 381 return -EINVAL; 382 } 383 384 /* interface format */ 385 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 386 case SND_SOC_DAIFMT_I2S: 387 iface |= 0x0002; 388 break; 389 case SND_SOC_DAIFMT_RIGHT_J: 390 break; 391 case SND_SOC_DAIFMT_LEFT_J: 392 iface |= 0x0001; 393 break; 394 case SND_SOC_DAIFMT_DSP_A: 395 iface |= 0x0003; 396 break; 397 case SND_SOC_DAIFMT_DSP_B: 398 iface |= 0x0013; 399 break; 400 default: 401 return -EINVAL; 402 } 403 404 /* clock inversion */ 405 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 406 case SND_SOC_DAIFMT_NB_NF: 407 break; 408 case SND_SOC_DAIFMT_IB_IF: 409 iface |= 0x0090; 410 break; 411 case SND_SOC_DAIFMT_IB_NF: 412 iface |= 0x0080; 413 break; 414 case SND_SOC_DAIFMT_NB_IF: 415 iface |= 0x0010; 416 break; 417 default: 418 return -EINVAL; 419 } 420 421 /* set iface */ 422 snd_soc_write(codec, WM8731_IFACE, iface); 423 return 0; 424 } 425 426 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 427 enum snd_soc_bias_level level) 428 { 429 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 430 int ret; 431 u16 reg; 432 433 switch (level) { 434 case SND_SOC_BIAS_ON: 435 break; 436 case SND_SOC_BIAS_PREPARE: 437 break; 438 case SND_SOC_BIAS_STANDBY: 439 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 440 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 441 wm8731->supplies); 442 if (ret != 0) 443 return ret; 444 445 snd_soc_cache_sync(codec); 446 } 447 448 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 449 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 450 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 451 break; 452 case SND_SOC_BIAS_OFF: 453 snd_soc_write(codec, WM8731_PWR, 0xffff); 454 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 455 wm8731->supplies); 456 codec->cache_sync = 1; 457 break; 458 } 459 codec->dapm.bias_level = level; 460 return 0; 461 } 462 463 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 464 465 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 466 SNDRV_PCM_FMTBIT_S24_LE) 467 468 static struct snd_soc_dai_ops wm8731_dai_ops = { 469 .hw_params = wm8731_hw_params, 470 .digital_mute = wm8731_mute, 471 .set_sysclk = wm8731_set_dai_sysclk, 472 .set_fmt = wm8731_set_dai_fmt, 473 }; 474 475 static struct snd_soc_dai_driver wm8731_dai = { 476 .name = "wm8731-hifi", 477 .playback = { 478 .stream_name = "Playback", 479 .channels_min = 1, 480 .channels_max = 2, 481 .rates = WM8731_RATES, 482 .formats = WM8731_FORMATS,}, 483 .capture = { 484 .stream_name = "Capture", 485 .channels_min = 1, 486 .channels_max = 2, 487 .rates = WM8731_RATES, 488 .formats = WM8731_FORMATS,}, 489 .ops = &wm8731_dai_ops, 490 .symmetric_rates = 1, 491 }; 492 493 #ifdef CONFIG_PM 494 static int wm8731_suspend(struct snd_soc_codec *codec, pm_message_t state) 495 { 496 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 497 498 return 0; 499 } 500 501 static int wm8731_resume(struct snd_soc_codec *codec) 502 { 503 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 504 505 return 0; 506 } 507 #else 508 #define wm8731_suspend NULL 509 #define wm8731_resume NULL 510 #endif 511 512 static int wm8731_probe(struct snd_soc_codec *codec) 513 { 514 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 515 int ret = 0, i; 516 517 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8731->control_type); 518 if (ret < 0) { 519 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 520 return ret; 521 } 522 523 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 524 wm8731->supplies[i].supply = wm8731_supply_names[i]; 525 526 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 527 wm8731->supplies); 528 if (ret != 0) { 529 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 530 return ret; 531 } 532 533 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 534 wm8731->supplies); 535 if (ret != 0) { 536 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 537 goto err_regulator_get; 538 } 539 540 ret = wm8731_reset(codec); 541 if (ret < 0) { 542 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 543 goto err_regulator_enable; 544 } 545 546 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 547 548 /* Latch the update bits */ 549 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 550 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 551 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 552 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 553 554 /* Disable bypass path by default */ 555 snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0); 556 557 snd_soc_add_controls(codec, wm8731_snd_controls, 558 ARRAY_SIZE(wm8731_snd_controls)); 559 560 /* Regulators will have been enabled by bias management */ 561 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 562 563 return 0; 564 565 err_regulator_enable: 566 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 567 err_regulator_get: 568 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 569 570 return ret; 571 } 572 573 /* power down chip */ 574 static int wm8731_remove(struct snd_soc_codec *codec) 575 { 576 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 577 578 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 579 580 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 581 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 582 583 return 0; 584 } 585 586 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = { 587 .probe = wm8731_probe, 588 .remove = wm8731_remove, 589 .suspend = wm8731_suspend, 590 .resume = wm8731_resume, 591 .set_bias_level = wm8731_set_bias_level, 592 .reg_cache_size = ARRAY_SIZE(wm8731_reg), 593 .reg_word_size = sizeof(u16), 594 .reg_cache_default = wm8731_reg, 595 .dapm_widgets = wm8731_dapm_widgets, 596 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), 597 .dapm_routes = wm8731_intercon, 598 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon), 599 }; 600 601 static const struct of_device_id wm8731_of_match[] = { 602 { .compatible = "wlf,wm8731", }, 603 { } 604 }; 605 606 MODULE_DEVICE_TABLE(of, wm8731_of_match); 607 608 #if defined(CONFIG_SPI_MASTER) 609 static int __devinit wm8731_spi_probe(struct spi_device *spi) 610 { 611 struct wm8731_priv *wm8731; 612 int ret; 613 614 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 615 if (wm8731 == NULL) 616 return -ENOMEM; 617 618 wm8731->control_type = SND_SOC_SPI; 619 spi_set_drvdata(spi, wm8731); 620 621 ret = snd_soc_register_codec(&spi->dev, 622 &soc_codec_dev_wm8731, &wm8731_dai, 1); 623 if (ret < 0) 624 kfree(wm8731); 625 return ret; 626 } 627 628 static int __devexit wm8731_spi_remove(struct spi_device *spi) 629 { 630 snd_soc_unregister_codec(&spi->dev); 631 kfree(spi_get_drvdata(spi)); 632 return 0; 633 } 634 635 static struct spi_driver wm8731_spi_driver = { 636 .driver = { 637 .name = "wm8731", 638 .owner = THIS_MODULE, 639 .of_match_table = wm8731_of_match, 640 }, 641 .probe = wm8731_spi_probe, 642 .remove = __devexit_p(wm8731_spi_remove), 643 }; 644 #endif /* CONFIG_SPI_MASTER */ 645 646 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 647 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c, 648 const struct i2c_device_id *id) 649 { 650 struct wm8731_priv *wm8731; 651 int ret; 652 653 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 654 if (wm8731 == NULL) 655 return -ENOMEM; 656 657 i2c_set_clientdata(i2c, wm8731); 658 wm8731->control_type = SND_SOC_I2C; 659 660 ret = snd_soc_register_codec(&i2c->dev, 661 &soc_codec_dev_wm8731, &wm8731_dai, 1); 662 if (ret < 0) 663 kfree(wm8731); 664 return ret; 665 } 666 667 static __devexit int wm8731_i2c_remove(struct i2c_client *client) 668 { 669 snd_soc_unregister_codec(&client->dev); 670 kfree(i2c_get_clientdata(client)); 671 return 0; 672 } 673 674 static const struct i2c_device_id wm8731_i2c_id[] = { 675 { "wm8731", 0 }, 676 { } 677 }; 678 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 679 680 static struct i2c_driver wm8731_i2c_driver = { 681 .driver = { 682 .name = "wm8731", 683 .owner = THIS_MODULE, 684 .of_match_table = wm8731_of_match, 685 }, 686 .probe = wm8731_i2c_probe, 687 .remove = __devexit_p(wm8731_i2c_remove), 688 .id_table = wm8731_i2c_id, 689 }; 690 #endif 691 692 static int __init wm8731_modinit(void) 693 { 694 int ret = 0; 695 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 696 ret = i2c_add_driver(&wm8731_i2c_driver); 697 if (ret != 0) { 698 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 699 ret); 700 } 701 #endif 702 #if defined(CONFIG_SPI_MASTER) 703 ret = spi_register_driver(&wm8731_spi_driver); 704 if (ret != 0) { 705 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 706 ret); 707 } 708 #endif 709 return ret; 710 } 711 module_init(wm8731_modinit); 712 713 static void __exit wm8731_exit(void) 714 { 715 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 716 i2c_del_driver(&wm8731_i2c_driver); 717 #endif 718 #if defined(CONFIG_SPI_MASTER) 719 spi_unregister_driver(&wm8731_spi_driver); 720 #endif 721 } 722 module_exit(wm8731_exit); 723 724 MODULE_DESCRIPTION("ASoC WM8731 driver"); 725 MODULE_AUTHOR("Richard Purdie"); 726 MODULE_LICENSE("GPL"); 727