1 /* 2 * wm8776.c -- WM8776 ALSA SoC Audio driver 3 * 4 * Copyright 2009 Wolfson Microelectronics plc 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * TODO: Input ALC/limiter support 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/platform_device.h> 22 #include <linux/spi/spi.h> 23 #include <linux/slab.h> 24 #include <sound/core.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include <sound/soc.h> 28 #include <sound/soc-dapm.h> 29 #include <sound/initval.h> 30 #include <sound/tlv.h> 31 32 #include "wm8776.h" 33 34 static struct snd_soc_codec *wm8776_codec; 35 struct snd_soc_codec_device soc_codec_dev_wm8776; 36 37 /* codec private data */ 38 struct wm8776_priv { 39 struct snd_soc_codec codec; 40 u16 reg_cache[WM8776_CACHEREGNUM]; 41 int sysclk[2]; 42 }; 43 44 #ifdef CONFIG_SPI_MASTER 45 static int wm8776_spi_write(struct spi_device *spi, const char *data, int len); 46 #endif 47 48 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = { 49 0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */ 50 0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */ 51 0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */ 52 0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */ 53 0xa6, 0x01, 0x01 54 }; 55 56 static int wm8776_reset(struct snd_soc_codec *codec) 57 { 58 return snd_soc_write(codec, WM8776_RESET, 0); 59 } 60 61 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1); 62 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1); 63 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1); 64 65 static const struct snd_kcontrol_new wm8776_snd_controls[] = { 66 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL, 67 0, 127, 0, hp_tlv), 68 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL, 69 0, 255, 0, dac_tlv), 70 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0), 71 72 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0), 73 74 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL, 75 0, 255, 0, adc_tlv), 76 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1), 77 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0), 78 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1), 79 }; 80 81 static const struct snd_kcontrol_new inmix_controls[] = { 82 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0), 83 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0), 84 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0), 85 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0), 86 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0), 87 }; 88 89 static const struct snd_kcontrol_new outmix_controls[] = { 90 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0), 91 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0), 92 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0), 93 }; 94 95 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = { 96 SND_SOC_DAPM_INPUT("AUX"), 97 98 SND_SOC_DAPM_INPUT("AIN1"), 99 SND_SOC_DAPM_INPUT("AIN2"), 100 SND_SOC_DAPM_INPUT("AIN3"), 101 SND_SOC_DAPM_INPUT("AIN4"), 102 SND_SOC_DAPM_INPUT("AIN5"), 103 104 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1, 105 inmix_controls, ARRAY_SIZE(inmix_controls)), 106 107 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1), 108 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1), 109 110 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, 111 outmix_controls, ARRAY_SIZE(outmix_controls)), 112 113 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0), 114 115 SND_SOC_DAPM_OUTPUT("VOUT"), 116 117 SND_SOC_DAPM_OUTPUT("HPOUTL"), 118 SND_SOC_DAPM_OUTPUT("HPOUTR"), 119 }; 120 121 static const struct snd_soc_dapm_route routes[] = { 122 { "Input Mixer", "AIN1 Switch", "AIN1" }, 123 { "Input Mixer", "AIN2 Switch", "AIN2" }, 124 { "Input Mixer", "AIN3 Switch", "AIN3" }, 125 { "Input Mixer", "AIN4 Switch", "AIN4" }, 126 { "Input Mixer", "AIN5 Switch", "AIN5" }, 127 128 { "ADC", NULL, "Input Mixer" }, 129 130 { "Output Mixer", "DAC Switch", "DAC" }, 131 { "Output Mixer", "AUX Switch", "AUX" }, 132 { "Output Mixer", "Bypass Switch", "Input Mixer" }, 133 134 { "VOUT", NULL, "Output Mixer" }, 135 136 { "Headphone PGA", NULL, "Output Mixer" }, 137 138 { "HPOUTL", NULL, "Headphone PGA" }, 139 { "HPOUTR", NULL, "Headphone PGA" }, 140 }; 141 142 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 143 { 144 struct snd_soc_codec *codec = dai->codec; 145 int reg, iface, master; 146 147 switch (dai->id) { 148 case WM8776_DAI_DAC: 149 reg = WM8776_DACIFCTRL; 150 master = 0x80; 151 break; 152 case WM8776_DAI_ADC: 153 reg = WM8776_ADCIFCTRL; 154 master = 0x100; 155 break; 156 default: 157 return -EINVAL; 158 } 159 160 iface = 0; 161 162 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 163 case SND_SOC_DAIFMT_CBM_CFM: 164 break; 165 case SND_SOC_DAIFMT_CBS_CFS: 166 master = 0; 167 break; 168 default: 169 return -EINVAL; 170 } 171 172 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 173 case SND_SOC_DAIFMT_I2S: 174 iface |= 0x0002; 175 break; 176 case SND_SOC_DAIFMT_RIGHT_J: 177 break; 178 case SND_SOC_DAIFMT_LEFT_J: 179 iface |= 0x0001; 180 break; 181 /* FIXME: CHECK A/B */ 182 case SND_SOC_DAIFMT_DSP_A: 183 iface |= 0x0003; 184 break; 185 case SND_SOC_DAIFMT_DSP_B: 186 iface |= 0x0007; 187 break; 188 default: 189 return -EINVAL; 190 } 191 192 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 193 case SND_SOC_DAIFMT_NB_NF: 194 break; 195 case SND_SOC_DAIFMT_IB_IF: 196 iface |= 0x00c; 197 break; 198 case SND_SOC_DAIFMT_IB_NF: 199 iface |= 0x008; 200 break; 201 case SND_SOC_DAIFMT_NB_IF: 202 iface |= 0x004; 203 break; 204 default: 205 return -EINVAL; 206 } 207 208 /* Finally, write out the values */ 209 snd_soc_update_bits(codec, reg, 0xf, iface); 210 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master); 211 212 return 0; 213 } 214 215 static int mclk_ratios[] = { 216 128, 217 192, 218 256, 219 384, 220 512, 221 768, 222 }; 223 224 static int wm8776_hw_params(struct snd_pcm_substream *substream, 225 struct snd_pcm_hw_params *params, 226 struct snd_soc_dai *dai) 227 { 228 struct snd_soc_codec *codec = dai->codec; 229 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 230 int iface_reg, iface; 231 int ratio_shift, master; 232 int i; 233 234 iface = 0; 235 236 switch (dai->id) { 237 case WM8776_DAI_DAC: 238 iface_reg = WM8776_DACIFCTRL; 239 master = 0x80; 240 ratio_shift = 4; 241 break; 242 case WM8776_DAI_ADC: 243 iface_reg = WM8776_ADCIFCTRL; 244 master = 0x100; 245 ratio_shift = 0; 246 break; 247 default: 248 return -EINVAL; 249 } 250 251 252 /* Set word length */ 253 switch (params_format(params)) { 254 case SNDRV_PCM_FORMAT_S16_LE: 255 break; 256 case SNDRV_PCM_FORMAT_S20_3LE: 257 iface |= 0x10; 258 break; 259 case SNDRV_PCM_FORMAT_S24_LE: 260 iface |= 0x20; 261 break; 262 case SNDRV_PCM_FORMAT_S32_LE: 263 iface |= 0x30; 264 break; 265 } 266 267 /* Only need to set MCLK/LRCLK ratio if we're master */ 268 if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) { 269 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) { 270 if (wm8776->sysclk[dai->id] / params_rate(params) 271 == mclk_ratios[i]) 272 break; 273 } 274 275 if (i == ARRAY_SIZE(mclk_ratios)) { 276 dev_err(codec->dev, 277 "Unable to configure MCLK ratio %d/%d\n", 278 wm8776->sysclk[dai->id], params_rate(params)); 279 return -EINVAL; 280 } 281 282 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]); 283 284 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 285 0x7 << ratio_shift, i << ratio_shift); 286 } else { 287 dev_dbg(codec->dev, "DAI in slave mode\n"); 288 } 289 290 snd_soc_update_bits(codec, iface_reg, 0x30, iface); 291 292 return 0; 293 } 294 295 static int wm8776_mute(struct snd_soc_dai *dai, int mute) 296 { 297 struct snd_soc_codec *codec = dai->codec; 298 299 return snd_soc_write(codec, WM8776_DACMUTE, !!mute); 300 } 301 302 static int wm8776_set_sysclk(struct snd_soc_dai *dai, 303 int clk_id, unsigned int freq, int dir) 304 { 305 struct snd_soc_codec *codec = dai->codec; 306 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 307 308 BUG_ON(dai->id >= ARRAY_SIZE(wm8776->sysclk)); 309 310 wm8776->sysclk[dai->id] = freq; 311 312 return 0; 313 } 314 315 static int wm8776_set_bias_level(struct snd_soc_codec *codec, 316 enum snd_soc_bias_level level) 317 { 318 switch (level) { 319 case SND_SOC_BIAS_ON: 320 break; 321 case SND_SOC_BIAS_PREPARE: 322 break; 323 case SND_SOC_BIAS_STANDBY: 324 if (codec->bias_level == SND_SOC_BIAS_OFF) { 325 /* Disable the global powerdown; DAPM does the rest */ 326 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0); 327 } 328 329 break; 330 case SND_SOC_BIAS_OFF: 331 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1); 332 break; 333 } 334 335 codec->bias_level = level; 336 return 0; 337 } 338 339 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ 340 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ 341 SNDRV_PCM_RATE_96000) 342 343 344 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 345 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 346 347 static struct snd_soc_dai_ops wm8776_dac_ops = { 348 .digital_mute = wm8776_mute, 349 .hw_params = wm8776_hw_params, 350 .set_fmt = wm8776_set_fmt, 351 .set_sysclk = wm8776_set_sysclk, 352 }; 353 354 static struct snd_soc_dai_ops wm8776_adc_ops = { 355 .hw_params = wm8776_hw_params, 356 .set_fmt = wm8776_set_fmt, 357 .set_sysclk = wm8776_set_sysclk, 358 }; 359 360 struct snd_soc_dai wm8776_dai[] = { 361 { 362 .name = "WM8776 Playback", 363 .id = WM8776_DAI_DAC, 364 .playback = { 365 .stream_name = "Playback", 366 .channels_min = 2, 367 .channels_max = 2, 368 .rates = WM8776_RATES, 369 .formats = WM8776_FORMATS, 370 }, 371 .ops = &wm8776_dac_ops, 372 }, 373 { 374 .name = "WM8776 Capture", 375 .id = WM8776_DAI_ADC, 376 .capture = { 377 .stream_name = "Capture", 378 .channels_min = 2, 379 .channels_max = 2, 380 .rates = WM8776_RATES, 381 .formats = WM8776_FORMATS, 382 }, 383 .ops = &wm8776_adc_ops, 384 }, 385 }; 386 EXPORT_SYMBOL_GPL(wm8776_dai); 387 388 #ifdef CONFIG_PM 389 static int wm8776_suspend(struct platform_device *pdev, pm_message_t state) 390 { 391 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 392 struct snd_soc_codec *codec = socdev->card->codec; 393 394 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 395 396 return 0; 397 } 398 399 static int wm8776_resume(struct platform_device *pdev) 400 { 401 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 402 struct snd_soc_codec *codec = socdev->card->codec; 403 int i; 404 u8 data[2]; 405 u16 *cache = codec->reg_cache; 406 407 /* Sync reg_cache with the hardware */ 408 for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) { 409 if (cache[i] == wm8776_reg[i]) 410 continue; 411 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 412 data[1] = cache[i] & 0x00ff; 413 codec->hw_write(codec->control_data, data, 2); 414 } 415 416 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 417 418 return 0; 419 } 420 #else 421 #define wm8776_suspend NULL 422 #define wm8776_resume NULL 423 #endif 424 425 static int wm8776_probe(struct platform_device *pdev) 426 { 427 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 428 struct snd_soc_codec *codec; 429 int ret = 0; 430 431 if (wm8776_codec == NULL) { 432 dev_err(&pdev->dev, "Codec device not registered\n"); 433 return -ENODEV; 434 } 435 436 socdev->card->codec = wm8776_codec; 437 codec = wm8776_codec; 438 439 /* register pcms */ 440 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 441 if (ret < 0) { 442 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 443 goto pcm_err; 444 } 445 446 snd_soc_add_controls(codec, wm8776_snd_controls, 447 ARRAY_SIZE(wm8776_snd_controls)); 448 snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets, 449 ARRAY_SIZE(wm8776_dapm_widgets)); 450 snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes)); 451 452 return ret; 453 454 pcm_err: 455 return ret; 456 } 457 458 /* power down chip */ 459 static int wm8776_remove(struct platform_device *pdev) 460 { 461 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 462 463 snd_soc_free_pcms(socdev); 464 snd_soc_dapm_free(socdev); 465 466 return 0; 467 } 468 469 struct snd_soc_codec_device soc_codec_dev_wm8776 = { 470 .probe = wm8776_probe, 471 .remove = wm8776_remove, 472 .suspend = wm8776_suspend, 473 .resume = wm8776_resume, 474 }; 475 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8776); 476 477 static int wm8776_register(struct wm8776_priv *wm8776, 478 enum snd_soc_control_type control) 479 { 480 int ret, i; 481 struct snd_soc_codec *codec = &wm8776->codec; 482 483 if (wm8776_codec) { 484 dev_err(codec->dev, "Another WM8776 is registered\n"); 485 ret = -EINVAL; 486 goto err; 487 } 488 489 mutex_init(&codec->mutex); 490 INIT_LIST_HEAD(&codec->dapm_widgets); 491 INIT_LIST_HEAD(&codec->dapm_paths); 492 493 snd_soc_codec_set_drvdata(codec, wm8776); 494 codec->name = "WM8776"; 495 codec->owner = THIS_MODULE; 496 codec->bias_level = SND_SOC_BIAS_OFF; 497 codec->set_bias_level = wm8776_set_bias_level; 498 codec->dai = wm8776_dai; 499 codec->num_dai = ARRAY_SIZE(wm8776_dai); 500 codec->reg_cache_size = WM8776_CACHEREGNUM; 501 codec->reg_cache = &wm8776->reg_cache; 502 503 memcpy(codec->reg_cache, wm8776_reg, sizeof(wm8776_reg)); 504 505 ret = snd_soc_codec_set_cache_io(codec, 7, 9, control); 506 if (ret < 0) { 507 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 508 goto err; 509 } 510 511 for (i = 0; i < ARRAY_SIZE(wm8776_dai); i++) 512 wm8776_dai[i].dev = codec->dev; 513 514 ret = wm8776_reset(codec); 515 if (ret < 0) { 516 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 517 goto err; 518 } 519 520 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 521 522 /* Latch the update bits; right channel only since we always 523 * update both. */ 524 snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100); 525 snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100); 526 527 wm8776_codec = codec; 528 529 ret = snd_soc_register_codec(codec); 530 if (ret != 0) { 531 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 532 goto err; 533 } 534 535 ret = snd_soc_register_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai)); 536 if (ret != 0) { 537 dev_err(codec->dev, "Failed to register DAIs: %d\n", ret); 538 goto err_codec; 539 } 540 541 return 0; 542 543 err_codec: 544 snd_soc_unregister_codec(codec); 545 err: 546 kfree(wm8776); 547 return ret; 548 } 549 550 static void wm8776_unregister(struct wm8776_priv *wm8776) 551 { 552 wm8776_set_bias_level(&wm8776->codec, SND_SOC_BIAS_OFF); 553 snd_soc_unregister_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai)); 554 snd_soc_unregister_codec(&wm8776->codec); 555 kfree(wm8776); 556 wm8776_codec = NULL; 557 } 558 559 #if defined(CONFIG_SPI_MASTER) 560 static int wm8776_spi_write(struct spi_device *spi, const char *data, int len) 561 { 562 struct spi_transfer t; 563 struct spi_message m; 564 u8 msg[2]; 565 566 if (len <= 0) 567 return 0; 568 569 msg[0] = data[0]; 570 msg[1] = data[1]; 571 572 spi_message_init(&m); 573 memset(&t, 0, (sizeof t)); 574 575 t.tx_buf = &msg[0]; 576 t.len = len; 577 578 spi_message_add_tail(&t, &m); 579 spi_sync(spi, &m); 580 581 return len; 582 } 583 584 static int __devinit wm8776_spi_probe(struct spi_device *spi) 585 { 586 struct snd_soc_codec *codec; 587 struct wm8776_priv *wm8776; 588 589 wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL); 590 if (wm8776 == NULL) 591 return -ENOMEM; 592 593 codec = &wm8776->codec; 594 codec->control_data = spi; 595 codec->hw_write = (hw_write_t)wm8776_spi_write; 596 codec->dev = &spi->dev; 597 598 dev_set_drvdata(&spi->dev, wm8776); 599 600 return wm8776_register(wm8776, SND_SOC_SPI); 601 } 602 603 static int __devexit wm8776_spi_remove(struct spi_device *spi) 604 { 605 struct wm8776_priv *wm8776 = dev_get_drvdata(&spi->dev); 606 607 wm8776_unregister(wm8776); 608 609 return 0; 610 } 611 612 static struct spi_driver wm8776_spi_driver = { 613 .driver = { 614 .name = "wm8776", 615 .bus = &spi_bus_type, 616 .owner = THIS_MODULE, 617 }, 618 .probe = wm8776_spi_probe, 619 .remove = __devexit_p(wm8776_spi_remove), 620 }; 621 #endif /* CONFIG_SPI_MASTER */ 622 623 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 624 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c, 625 const struct i2c_device_id *id) 626 { 627 struct wm8776_priv *wm8776; 628 struct snd_soc_codec *codec; 629 630 wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL); 631 if (wm8776 == NULL) 632 return -ENOMEM; 633 634 codec = &wm8776->codec; 635 codec->hw_write = (hw_write_t)i2c_master_send; 636 637 i2c_set_clientdata(i2c, wm8776); 638 codec->control_data = i2c; 639 640 codec->dev = &i2c->dev; 641 642 return wm8776_register(wm8776, SND_SOC_I2C); 643 } 644 645 static __devexit int wm8776_i2c_remove(struct i2c_client *client) 646 { 647 struct wm8776_priv *wm8776 = i2c_get_clientdata(client); 648 wm8776_unregister(wm8776); 649 return 0; 650 } 651 652 static const struct i2c_device_id wm8776_i2c_id[] = { 653 { "wm8776", 0 }, 654 { } 655 }; 656 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id); 657 658 static struct i2c_driver wm8776_i2c_driver = { 659 .driver = { 660 .name = "wm8776", 661 .owner = THIS_MODULE, 662 }, 663 .probe = wm8776_i2c_probe, 664 .remove = __devexit_p(wm8776_i2c_remove), 665 .id_table = wm8776_i2c_id, 666 }; 667 #endif 668 669 static int __init wm8776_modinit(void) 670 { 671 int ret; 672 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 673 ret = i2c_add_driver(&wm8776_i2c_driver); 674 if (ret != 0) { 675 printk(KERN_ERR "Failed to register WM8776 I2C driver: %d\n", 676 ret); 677 } 678 #endif 679 #if defined(CONFIG_SPI_MASTER) 680 ret = spi_register_driver(&wm8776_spi_driver); 681 if (ret != 0) { 682 printk(KERN_ERR "Failed to register WM8776 SPI driver: %d\n", 683 ret); 684 } 685 #endif 686 return 0; 687 } 688 module_init(wm8776_modinit); 689 690 static void __exit wm8776_exit(void) 691 { 692 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 693 i2c_del_driver(&wm8776_i2c_driver); 694 #endif 695 #if defined(CONFIG_SPI_MASTER) 696 spi_unregister_driver(&wm8776_spi_driver); 697 #endif 698 } 699 module_exit(wm8776_exit); 700 701 MODULE_DESCRIPTION("ASoC WM8776 driver"); 702 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 703 MODULE_LICENSE("GPL"); 704