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 u16 reg_cache[WM8731_CACHEREGNUM]; 47 unsigned int sysclk; 48 int sysclk_type; 49 }; 50 51 52 /* 53 * wm8731 register cache 54 * We can't read the WM8731 register space when we are 55 * using 2 wire for device control, so we cache them instead. 56 * There is no point in caching the reset register 57 */ 58 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = { 59 0x0097, 0x0097, 0x0079, 0x0079, 60 0x000a, 0x0008, 0x009f, 0x000a, 61 0x0000, 0x0000 62 }; 63 64 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0) 65 66 static const char *wm8731_input_select[] = {"Line In", "Mic"}; 67 68 static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"}; 69 70 static const struct soc_enum wm8731_insel_enum = 71 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select); 72 73 static const struct soc_enum wm8731_deemph_enum = 74 SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph); 75 76 77 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 78 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 79 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 80 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0); 81 82 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 83 84 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 85 0, 127, 0, out_tlv), 86 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 87 7, 1, 0), 88 89 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 90 in_tlv), 91 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 92 93 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv), 94 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 95 96 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 97 sidetone_tlv), 98 99 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 100 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 101 102 SOC_ENUM("Playback De-emphasis", wm8731_deemph_enum), 103 }; 104 105 /* Output Mixer */ 106 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 107 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 108 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 109 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 110 }; 111 112 /* Input mux */ 113 static const struct snd_kcontrol_new wm8731_input_mux_controls = 114 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum); 115 116 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 117 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), 118 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 119 &wm8731_output_mixer_controls[0], 120 ARRAY_SIZE(wm8731_output_mixer_controls)), 121 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 122 SND_SOC_DAPM_OUTPUT("LOUT"), 123 SND_SOC_DAPM_OUTPUT("LHPOUT"), 124 SND_SOC_DAPM_OUTPUT("ROUT"), 125 SND_SOC_DAPM_OUTPUT("RHPOUT"), 126 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 127 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 128 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 129 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 130 SND_SOC_DAPM_INPUT("MICIN"), 131 SND_SOC_DAPM_INPUT("RLINEIN"), 132 SND_SOC_DAPM_INPUT("LLINEIN"), 133 }; 134 135 static int wm8731_check_osc(struct snd_soc_dapm_widget *source, 136 struct snd_soc_dapm_widget *sink) 137 { 138 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec); 139 140 return wm8731->sysclk_type == WM8731_SYSCLK_MCLK; 141 } 142 143 static const struct snd_soc_dapm_route intercon[] = { 144 {"DAC", NULL, "OSC", wm8731_check_osc}, 145 {"ADC", NULL, "OSC", wm8731_check_osc}, 146 147 /* output mixer */ 148 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 149 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 150 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 151 152 /* outputs */ 153 {"RHPOUT", NULL, "Output Mixer"}, 154 {"ROUT", NULL, "Output Mixer"}, 155 {"LHPOUT", NULL, "Output Mixer"}, 156 {"LOUT", NULL, "Output Mixer"}, 157 158 /* input mux */ 159 {"Input Mux", "Line In", "Line Input"}, 160 {"Input Mux", "Mic", "Mic Bias"}, 161 {"ADC", NULL, "Input Mux"}, 162 163 /* inputs */ 164 {"Line Input", NULL, "LLINEIN"}, 165 {"Line Input", NULL, "RLINEIN"}, 166 {"Mic Bias", NULL, "MICIN"}, 167 }; 168 169 static int wm8731_add_widgets(struct snd_soc_codec *codec) 170 { 171 struct snd_soc_dapm_context *dapm = &codec->dapm; 172 173 snd_soc_dapm_new_controls(dapm, wm8731_dapm_widgets, 174 ARRAY_SIZE(wm8731_dapm_widgets)); 175 snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon)); 176 177 return 0; 178 } 179 180 struct _coeff_div { 181 u32 mclk; 182 u32 rate; 183 u16 fs; 184 u8 sr:4; 185 u8 bosr:1; 186 u8 usb:1; 187 }; 188 189 /* codec mclk clock divider coefficients */ 190 static const struct _coeff_div coeff_div[] = { 191 /* 48k */ 192 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 193 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 194 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 195 196 /* 32k */ 197 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 198 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 199 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 200 201 /* 8k */ 202 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 203 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 204 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 205 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 206 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 207 208 /* 96k */ 209 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 210 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 211 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 212 213 /* 44.1k */ 214 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 215 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 216 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 217 218 /* 88.2k */ 219 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 220 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 221 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 222 }; 223 224 static inline int get_coeff(int mclk, int rate) 225 { 226 int i; 227 228 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 229 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 230 return i; 231 } 232 return 0; 233 } 234 235 static int wm8731_hw_params(struct snd_pcm_substream *substream, 236 struct snd_pcm_hw_params *params, 237 struct snd_soc_dai *dai) 238 { 239 struct snd_soc_codec *codec = dai->codec; 240 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 241 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 242 int i = get_coeff(wm8731->sysclk, params_rate(params)); 243 u16 srate = (coeff_div[i].sr << 2) | 244 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 245 246 snd_soc_write(codec, WM8731_SRATE, srate); 247 248 /* bit size */ 249 switch (params_format(params)) { 250 case SNDRV_PCM_FORMAT_S16_LE: 251 break; 252 case SNDRV_PCM_FORMAT_S20_3LE: 253 iface |= 0x0004; 254 break; 255 case SNDRV_PCM_FORMAT_S24_LE: 256 iface |= 0x0008; 257 break; 258 } 259 260 snd_soc_write(codec, WM8731_IFACE, iface); 261 return 0; 262 } 263 264 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream, 265 struct snd_soc_dai *dai) 266 { 267 struct snd_soc_codec *codec = dai->codec; 268 269 /* set active */ 270 snd_soc_write(codec, WM8731_ACTIVE, 0x0001); 271 272 return 0; 273 } 274 275 static void wm8731_shutdown(struct snd_pcm_substream *substream, 276 struct snd_soc_dai *dai) 277 { 278 struct snd_soc_codec *codec = dai->codec; 279 280 /* deactivate */ 281 if (!codec->active) { 282 udelay(50); 283 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 284 } 285 } 286 287 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 288 { 289 struct snd_soc_codec *codec = dai->codec; 290 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 291 292 if (mute) 293 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 294 else 295 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 296 return 0; 297 } 298 299 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 300 int clk_id, unsigned int freq, int dir) 301 { 302 struct snd_soc_codec *codec = codec_dai->codec; 303 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 304 305 switch (clk_id) { 306 case WM8731_SYSCLK_XTAL: 307 case WM8731_SYSCLK_MCLK: 308 wm8731->sysclk_type = clk_id; 309 break; 310 default: 311 return -EINVAL; 312 } 313 314 switch (freq) { 315 case 11289600: 316 case 12000000: 317 case 12288000: 318 case 16934400: 319 case 18432000: 320 wm8731->sysclk = freq; 321 break; 322 default: 323 return -EINVAL; 324 } 325 326 snd_soc_dapm_sync(&codec->dapm); 327 328 return 0; 329 } 330 331 332 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 333 unsigned int fmt) 334 { 335 struct snd_soc_codec *codec = codec_dai->codec; 336 u16 iface = 0; 337 338 /* set master/slave audio interface */ 339 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 340 case SND_SOC_DAIFMT_CBM_CFM: 341 iface |= 0x0040; 342 break; 343 case SND_SOC_DAIFMT_CBS_CFS: 344 break; 345 default: 346 return -EINVAL; 347 } 348 349 /* interface format */ 350 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 351 case SND_SOC_DAIFMT_I2S: 352 iface |= 0x0002; 353 break; 354 case SND_SOC_DAIFMT_RIGHT_J: 355 break; 356 case SND_SOC_DAIFMT_LEFT_J: 357 iface |= 0x0001; 358 break; 359 case SND_SOC_DAIFMT_DSP_A: 360 iface |= 0x0003; 361 break; 362 case SND_SOC_DAIFMT_DSP_B: 363 iface |= 0x0013; 364 break; 365 default: 366 return -EINVAL; 367 } 368 369 /* clock inversion */ 370 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 371 case SND_SOC_DAIFMT_NB_NF: 372 break; 373 case SND_SOC_DAIFMT_IB_IF: 374 iface |= 0x0090; 375 break; 376 case SND_SOC_DAIFMT_IB_NF: 377 iface |= 0x0080; 378 break; 379 case SND_SOC_DAIFMT_NB_IF: 380 iface |= 0x0010; 381 break; 382 default: 383 return -EINVAL; 384 } 385 386 /* set iface */ 387 snd_soc_write(codec, WM8731_IFACE, iface); 388 return 0; 389 } 390 391 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 392 enum snd_soc_bias_level level) 393 { 394 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 395 int i, ret; 396 u8 data[2]; 397 u16 *cache = codec->reg_cache; 398 u16 reg; 399 400 switch (level) { 401 case SND_SOC_BIAS_ON: 402 break; 403 case SND_SOC_BIAS_PREPARE: 404 break; 405 case SND_SOC_BIAS_STANDBY: 406 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 407 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 408 wm8731->supplies); 409 if (ret != 0) 410 return ret; 411 412 /* Sync reg_cache with the hardware */ 413 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) { 414 if (cache[i] == wm8731_reg[i]) 415 continue; 416 417 data[0] = (i << 1) | ((cache[i] >> 8) 418 & 0x0001); 419 data[1] = cache[i] & 0x00ff; 420 codec->hw_write(codec->control_data, data, 2); 421 } 422 } 423 424 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 425 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 426 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 427 break; 428 case SND_SOC_BIAS_OFF: 429 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 430 snd_soc_write(codec, WM8731_PWR, 0xffff); 431 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 432 wm8731->supplies); 433 break; 434 } 435 codec->dapm.bias_level = level; 436 return 0; 437 } 438 439 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 440 441 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 442 SNDRV_PCM_FMTBIT_S24_LE) 443 444 static struct snd_soc_dai_ops wm8731_dai_ops = { 445 .prepare = wm8731_pcm_prepare, 446 .hw_params = wm8731_hw_params, 447 .shutdown = wm8731_shutdown, 448 .digital_mute = wm8731_mute, 449 .set_sysclk = wm8731_set_dai_sysclk, 450 .set_fmt = wm8731_set_dai_fmt, 451 }; 452 453 static struct snd_soc_dai_driver wm8731_dai = { 454 .name = "wm8731-hifi", 455 .playback = { 456 .stream_name = "Playback", 457 .channels_min = 1, 458 .channels_max = 2, 459 .rates = WM8731_RATES, 460 .formats = WM8731_FORMATS,}, 461 .capture = { 462 .stream_name = "Capture", 463 .channels_min = 1, 464 .channels_max = 2, 465 .rates = WM8731_RATES, 466 .formats = WM8731_FORMATS,}, 467 .ops = &wm8731_dai_ops, 468 .symmetric_rates = 1, 469 }; 470 471 #ifdef CONFIG_PM 472 static int wm8731_suspend(struct snd_soc_codec *codec, pm_message_t state) 473 { 474 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 475 476 return 0; 477 } 478 479 static int wm8731_resume(struct snd_soc_codec *codec) 480 { 481 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 482 483 return 0; 484 } 485 #else 486 #define wm8731_suspend NULL 487 #define wm8731_resume NULL 488 #endif 489 490 static int wm8731_probe(struct snd_soc_codec *codec) 491 { 492 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 493 int ret = 0, i; 494 495 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8731->control_type); 496 if (ret < 0) { 497 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 498 return ret; 499 } 500 501 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 502 wm8731->supplies[i].supply = wm8731_supply_names[i]; 503 504 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 505 wm8731->supplies); 506 if (ret != 0) { 507 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 508 return ret; 509 } 510 511 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 512 wm8731->supplies); 513 if (ret != 0) { 514 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 515 goto err_regulator_get; 516 } 517 518 ret = wm8731_reset(codec); 519 if (ret < 0) { 520 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 521 goto err_regulator_enable; 522 } 523 524 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 525 526 /* Latch the update bits */ 527 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 528 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 529 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 530 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 531 532 /* Disable bypass path by default */ 533 snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0); 534 535 snd_soc_add_controls(codec, wm8731_snd_controls, 536 ARRAY_SIZE(wm8731_snd_controls)); 537 wm8731_add_widgets(codec); 538 539 /* Regulators will have been enabled by bias management */ 540 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 541 542 return 0; 543 544 err_regulator_enable: 545 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 546 err_regulator_get: 547 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 548 549 return ret; 550 } 551 552 /* power down chip */ 553 static int wm8731_remove(struct snd_soc_codec *codec) 554 { 555 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 556 557 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 558 559 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 560 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 561 562 return 0; 563 } 564 565 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = { 566 .probe = wm8731_probe, 567 .remove = wm8731_remove, 568 .suspend = wm8731_suspend, 569 .resume = wm8731_resume, 570 .set_bias_level = wm8731_set_bias_level, 571 .reg_cache_size = ARRAY_SIZE(wm8731_reg), 572 .reg_word_size = sizeof(u16), 573 .reg_cache_default = wm8731_reg, 574 }; 575 576 #if defined(CONFIG_SPI_MASTER) 577 static int __devinit wm8731_spi_probe(struct spi_device *spi) 578 { 579 struct wm8731_priv *wm8731; 580 int ret; 581 582 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 583 if (wm8731 == NULL) 584 return -ENOMEM; 585 586 wm8731->control_type = SND_SOC_SPI; 587 spi_set_drvdata(spi, wm8731); 588 589 ret = snd_soc_register_codec(&spi->dev, 590 &soc_codec_dev_wm8731, &wm8731_dai, 1); 591 if (ret < 0) 592 kfree(wm8731); 593 return ret; 594 } 595 596 static int __devexit wm8731_spi_remove(struct spi_device *spi) 597 { 598 snd_soc_unregister_codec(&spi->dev); 599 kfree(spi_get_drvdata(spi)); 600 return 0; 601 } 602 603 static struct spi_driver wm8731_spi_driver = { 604 .driver = { 605 .name = "wm8731-codec", 606 .owner = THIS_MODULE, 607 }, 608 .probe = wm8731_spi_probe, 609 .remove = __devexit_p(wm8731_spi_remove), 610 }; 611 #endif /* CONFIG_SPI_MASTER */ 612 613 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 614 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c, 615 const struct i2c_device_id *id) 616 { 617 struct wm8731_priv *wm8731; 618 int ret; 619 620 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 621 if (wm8731 == NULL) 622 return -ENOMEM; 623 624 i2c_set_clientdata(i2c, wm8731); 625 wm8731->control_type = SND_SOC_I2C; 626 627 ret = snd_soc_register_codec(&i2c->dev, 628 &soc_codec_dev_wm8731, &wm8731_dai, 1); 629 if (ret < 0) 630 kfree(wm8731); 631 return ret; 632 } 633 634 static __devexit int wm8731_i2c_remove(struct i2c_client *client) 635 { 636 snd_soc_unregister_codec(&client->dev); 637 kfree(i2c_get_clientdata(client)); 638 return 0; 639 } 640 641 static const struct i2c_device_id wm8731_i2c_id[] = { 642 { "wm8731", 0 }, 643 { } 644 }; 645 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); 646 647 static struct i2c_driver wm8731_i2c_driver = { 648 .driver = { 649 .name = "wm8731-codec", 650 .owner = THIS_MODULE, 651 }, 652 .probe = wm8731_i2c_probe, 653 .remove = __devexit_p(wm8731_i2c_remove), 654 .id_table = wm8731_i2c_id, 655 }; 656 #endif 657 658 static int __init wm8731_modinit(void) 659 { 660 int ret = 0; 661 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 662 ret = i2c_add_driver(&wm8731_i2c_driver); 663 if (ret != 0) { 664 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", 665 ret); 666 } 667 #endif 668 #if defined(CONFIG_SPI_MASTER) 669 ret = spi_register_driver(&wm8731_spi_driver); 670 if (ret != 0) { 671 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", 672 ret); 673 } 674 #endif 675 return ret; 676 } 677 module_init(wm8731_modinit); 678 679 static void __exit wm8731_exit(void) 680 { 681 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 682 i2c_del_driver(&wm8731_i2c_driver); 683 #endif 684 #if defined(CONFIG_SPI_MASTER) 685 spi_unregister_driver(&wm8731_spi_driver); 686 #endif 687 } 688 module_exit(wm8731_exit); 689 690 MODULE_DESCRIPTION("ASoC WM8731 driver"); 691 MODULE_AUTHOR("Richard Purdie"); 692 MODULE_LICENSE("GPL"); 693