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/soc-dapm.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 u16 reg_cache[WM8731_CACHEREGNUM]; 48 unsigned int sysclk; 49 int sysclk_type; 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 static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"}; 69 70 static const struct soc_enum wm8731_enum[] = { 71 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select), 72 SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph), 73 }; 74 75 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 76 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 77 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 78 79 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 80 81 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 82 0, 127, 0, out_tlv), 83 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 84 7, 1, 0), 85 86 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 87 in_tlv), 88 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 89 90 SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0), 91 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 92 93 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 94 sidetone_tlv), 95 96 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 97 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 98 99 SOC_ENUM("Playback De-emphasis", wm8731_enum[1]), 100 }; 101 102 /* Output Mixer */ 103 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 104 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 105 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 106 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 107 }; 108 109 /* Input mux */ 110 static const struct snd_kcontrol_new wm8731_input_mux_controls = 111 SOC_DAPM_ENUM("Input Select", wm8731_enum[0]); 112 113 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 114 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), 115 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 116 &wm8731_output_mixer_controls[0], 117 ARRAY_SIZE(wm8731_output_mixer_controls)), 118 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 119 SND_SOC_DAPM_OUTPUT("LOUT"), 120 SND_SOC_DAPM_OUTPUT("LHPOUT"), 121 SND_SOC_DAPM_OUTPUT("ROUT"), 122 SND_SOC_DAPM_OUTPUT("RHPOUT"), 123 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 124 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 125 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 126 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 127 SND_SOC_DAPM_INPUT("MICIN"), 128 SND_SOC_DAPM_INPUT("RLINEIN"), 129 SND_SOC_DAPM_INPUT("LLINEIN"), 130 }; 131 132 static int wm8731_check_osc(struct snd_soc_dapm_widget *source, 133 struct snd_soc_dapm_widget *sink) 134 { 135 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec); 136 137 return wm8731->sysclk_type == WM8731_SYSCLK_MCLK; 138 } 139 140 static const struct snd_soc_dapm_route intercon[] = { 141 {"DAC", NULL, "OSC", wm8731_check_osc}, 142 {"ADC", NULL, "OSC", wm8731_check_osc}, 143 144 /* output mixer */ 145 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 146 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 147 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 148 149 /* outputs */ 150 {"RHPOUT", NULL, "Output Mixer"}, 151 {"ROUT", NULL, "Output Mixer"}, 152 {"LHPOUT", NULL, "Output Mixer"}, 153 {"LOUT", NULL, "Output Mixer"}, 154 155 /* input mux */ 156 {"Input Mux", "Line In", "Line Input"}, 157 {"Input Mux", "Mic", "Mic Bias"}, 158 {"ADC", NULL, "Input Mux"}, 159 160 /* inputs */ 161 {"Line Input", NULL, "LLINEIN"}, 162 {"Line Input", NULL, "RLINEIN"}, 163 {"Mic Bias", NULL, "MICIN"}, 164 }; 165 166 static int wm8731_add_widgets(struct snd_soc_codec *codec) 167 { 168 snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets, 169 ARRAY_SIZE(wm8731_dapm_widgets)); 170 171 snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); 172 173 return 0; 174 } 175 176 struct _coeff_div { 177 u32 mclk; 178 u32 rate; 179 u16 fs; 180 u8 sr:4; 181 u8 bosr:1; 182 u8 usb:1; 183 }; 184 185 /* codec mclk clock divider coefficients */ 186 static const struct _coeff_div coeff_div[] = { 187 /* 48k */ 188 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 189 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 190 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 191 192 /* 32k */ 193 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 194 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 195 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 196 197 /* 8k */ 198 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 199 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 200 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 201 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 202 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 203 204 /* 96k */ 205 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 206 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 207 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 208 209 /* 44.1k */ 210 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 211 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 212 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 213 214 /* 88.2k */ 215 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 216 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 217 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 218 }; 219 220 static inline int get_coeff(int mclk, int rate) 221 { 222 int i; 223 224 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 225 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 226 return i; 227 } 228 return 0; 229 } 230 231 static int wm8731_hw_params(struct snd_pcm_substream *substream, 232 struct snd_pcm_hw_params *params, 233 struct snd_soc_dai *dai) 234 { 235 struct snd_soc_codec *codec = dai->codec; 236 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 237 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3; 238 int i = get_coeff(wm8731->sysclk, params_rate(params)); 239 u16 srate = (coeff_div[i].sr << 2) | 240 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 241 242 snd_soc_write(codec, WM8731_SRATE, srate); 243 244 /* bit size */ 245 switch (params_format(params)) { 246 case SNDRV_PCM_FORMAT_S16_LE: 247 break; 248 case SNDRV_PCM_FORMAT_S20_3LE: 249 iface |= 0x0004; 250 break; 251 case SNDRV_PCM_FORMAT_S24_LE: 252 iface |= 0x0008; 253 break; 254 } 255 256 snd_soc_write(codec, WM8731_IFACE, iface); 257 return 0; 258 } 259 260 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream, 261 struct snd_soc_dai *dai) 262 { 263 struct snd_soc_codec *codec = dai->codec; 264 265 /* set active */ 266 snd_soc_write(codec, WM8731_ACTIVE, 0x0001); 267 268 return 0; 269 } 270 271 static void wm8731_shutdown(struct snd_pcm_substream *substream, 272 struct snd_soc_dai *dai) 273 { 274 struct snd_soc_codec *codec = dai->codec; 275 276 /* deactivate */ 277 if (!codec->active) { 278 udelay(50); 279 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 280 } 281 } 282 283 static int wm8731_mute(struct snd_soc_dai *dai, int mute) 284 { 285 struct snd_soc_codec *codec = dai->codec; 286 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7; 287 288 if (mute) 289 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8); 290 else 291 snd_soc_write(codec, WM8731_APDIGI, mute_reg); 292 return 0; 293 } 294 295 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 296 int clk_id, unsigned int freq, int dir) 297 { 298 struct snd_soc_codec *codec = codec_dai->codec; 299 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 300 301 switch (clk_id) { 302 case WM8731_SYSCLK_XTAL: 303 case WM8731_SYSCLK_MCLK: 304 wm8731->sysclk_type = clk_id; 305 break; 306 default: 307 return -EINVAL; 308 } 309 310 switch (freq) { 311 case 11289600: 312 case 12000000: 313 case 12288000: 314 case 16934400: 315 case 18432000: 316 wm8731->sysclk = freq; 317 break; 318 default: 319 return -EINVAL; 320 } 321 322 snd_soc_dapm_sync(codec); 323 324 return 0; 325 } 326 327 328 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 329 unsigned int fmt) 330 { 331 struct snd_soc_codec *codec = codec_dai->codec; 332 u16 iface = 0; 333 334 /* set master/slave audio interface */ 335 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 336 case SND_SOC_DAIFMT_CBM_CFM: 337 iface |= 0x0040; 338 break; 339 case SND_SOC_DAIFMT_CBS_CFS: 340 break; 341 default: 342 return -EINVAL; 343 } 344 345 /* interface format */ 346 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 347 case SND_SOC_DAIFMT_I2S: 348 iface |= 0x0002; 349 break; 350 case SND_SOC_DAIFMT_RIGHT_J: 351 break; 352 case SND_SOC_DAIFMT_LEFT_J: 353 iface |= 0x0001; 354 break; 355 case SND_SOC_DAIFMT_DSP_A: 356 iface |= 0x0003; 357 break; 358 case SND_SOC_DAIFMT_DSP_B: 359 iface |= 0x0013; 360 break; 361 default: 362 return -EINVAL; 363 } 364 365 /* clock inversion */ 366 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 367 case SND_SOC_DAIFMT_NB_NF: 368 break; 369 case SND_SOC_DAIFMT_IB_IF: 370 iface |= 0x0090; 371 break; 372 case SND_SOC_DAIFMT_IB_NF: 373 iface |= 0x0080; 374 break; 375 case SND_SOC_DAIFMT_NB_IF: 376 iface |= 0x0010; 377 break; 378 default: 379 return -EINVAL; 380 } 381 382 /* set iface */ 383 snd_soc_write(codec, WM8731_IFACE, iface); 384 return 0; 385 } 386 387 static int wm8731_set_bias_level(struct snd_soc_codec *codec, 388 enum snd_soc_bias_level level) 389 { 390 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 391 int i, ret; 392 u8 data[2]; 393 u16 *cache = codec->reg_cache; 394 u16 reg; 395 396 switch (level) { 397 case SND_SOC_BIAS_ON: 398 break; 399 case SND_SOC_BIAS_PREPARE: 400 break; 401 case SND_SOC_BIAS_STANDBY: 402 if (codec->bias_level == SND_SOC_BIAS_OFF) { 403 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 404 wm8731->supplies); 405 if (ret != 0) 406 return ret; 407 408 /* Sync reg_cache with the hardware */ 409 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) { 410 if (cache[i] == wm8731_reg[i]) 411 continue; 412 413 data[0] = (i << 1) | ((cache[i] >> 8) 414 & 0x0001); 415 data[1] = cache[i] & 0x00ff; 416 codec->hw_write(codec->control_data, data, 2); 417 } 418 } 419 420 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 421 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f; 422 snd_soc_write(codec, WM8731_PWR, reg | 0x0040); 423 break; 424 case SND_SOC_BIAS_OFF: 425 snd_soc_write(codec, WM8731_ACTIVE, 0x0); 426 snd_soc_write(codec, WM8731_PWR, 0xffff); 427 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 428 wm8731->supplies); 429 break; 430 } 431 codec->bias_level = level; 432 return 0; 433 } 434 435 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 436 437 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 438 SNDRV_PCM_FMTBIT_S24_LE) 439 440 static struct snd_soc_dai_ops wm8731_dai_ops = { 441 .prepare = wm8731_pcm_prepare, 442 .hw_params = wm8731_hw_params, 443 .shutdown = wm8731_shutdown, 444 .digital_mute = wm8731_mute, 445 .set_sysclk = wm8731_set_dai_sysclk, 446 .set_fmt = wm8731_set_dai_fmt, 447 }; 448 449 static struct snd_soc_dai_driver wm8731_dai = { 450 .name = "wm8731-hifi", 451 .playback = { 452 .stream_name = "Playback", 453 .channels_min = 1, 454 .channels_max = 2, 455 .rates = WM8731_RATES, 456 .formats = WM8731_FORMATS,}, 457 .capture = { 458 .stream_name = "Capture", 459 .channels_min = 1, 460 .channels_max = 2, 461 .rates = WM8731_RATES, 462 .formats = WM8731_FORMATS,}, 463 .ops = &wm8731_dai_ops, 464 .symmetric_rates = 1, 465 }; 466 467 #ifdef CONFIG_PM 468 static int wm8731_suspend(struct snd_soc_codec *codec, pm_message_t state) 469 { 470 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 471 472 return 0; 473 } 474 475 static int wm8731_resume(struct snd_soc_codec *codec) 476 { 477 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 478 479 return 0; 480 } 481 #else 482 #define wm8731_suspend NULL 483 #define wm8731_resume NULL 484 #endif 485 486 static int wm8731_probe(struct snd_soc_codec *codec) 487 { 488 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 489 int ret = 0, i; 490 491 codec->bias_level = SND_SOC_BIAS_OFF, 492 493 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8731->control_type); 494 if (ret < 0) { 495 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 496 return ret; 497 } 498 499 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 500 wm8731->supplies[i].supply = wm8731_supply_names[i]; 501 502 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies), 503 wm8731->supplies); 504 if (ret != 0) { 505 dev_err(codec->dev, "Failed to request supplies: %d\n", ret); 506 return ret; 507 } 508 509 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 510 wm8731->supplies); 511 if (ret != 0) { 512 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 513 goto err_regulator_get; 514 } 515 516 ret = wm8731_reset(codec); 517 if (ret < 0) { 518 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 519 goto err_regulator_enable; 520 } 521 522 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 523 524 /* Latch the update bits */ 525 snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0); 526 snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0); 527 snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0); 528 snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0); 529 530 /* Disable bypass path by default */ 531 snd_soc_update_bits(codec, WM8731_APANA, 0x4, 0); 532 533 snd_soc_add_controls(codec, wm8731_snd_controls, 534 ARRAY_SIZE(wm8731_snd_controls)); 535 wm8731_add_widgets(codec); 536 537 /* Regulators will have been enabled by bias management */ 538 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 539 540 return 0; 541 542 err_regulator_enable: 543 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 544 err_regulator_get: 545 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 546 547 kfree(wm8731); 548 return ret; 549 } 550 551 /* power down chip */ 552 static int wm8731_remove(struct snd_soc_codec *codec) 553 { 554 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec); 555 556 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); 557 558 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 559 regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 560 561 return 0; 562 } 563 564 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = { 565 .probe = wm8731_probe, 566 .remove = wm8731_remove, 567 .suspend = wm8731_suspend, 568 .resume = wm8731_resume, 569 .set_bias_level = wm8731_set_bias_level, 570 .reg_cache_size = ARRAY_SIZE(wm8731_reg), 571 .reg_word_size = sizeof(u16), 572 .reg_cache_default = wm8731_reg, 573 }; 574 575 #if defined(CONFIG_SPI_MASTER) 576 static int __devinit wm8731_spi_probe(struct spi_device *spi) 577 { 578 struct wm8731_priv *wm8731; 579 int ret; 580 581 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); 582 if (wm8731 == NULL) 583 return -ENOMEM; 584 585 wm8731->control_type = SND_SOC_SPI; 586 spi_set_drvdata(spi, wm8731); 587 588 ret = snd_soc_register_codec(&spi->dev, 589 &soc_codec_dev_wm8731, &wm8731_dai, 1); 590 if (ret < 0) 591 kfree(wm8731); 592 return ret; 593 } 594 595 static int __devexit wm8731_spi_remove(struct spi_device *spi) 596 { 597 snd_soc_unregister_codec(&spi->dev); 598 kfree(spi_get_drvdata(spi)); 599 return 0; 600 } 601 602 static struct spi_driver wm8731_spi_driver = { 603 .driver = { 604 .name = "wm8731-codec", 605 .bus = &spi_bus_type, 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