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 SND_SOC_DAPM_INPUT("AUX"), 98 99 SND_SOC_DAPM_INPUT("AIN1"), 100 SND_SOC_DAPM_INPUT("AIN2"), 101 SND_SOC_DAPM_INPUT("AIN3"), 102 SND_SOC_DAPM_INPUT("AIN4"), 103 SND_SOC_DAPM_INPUT("AIN5"), 104 105 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1, 106 inmix_controls, ARRAY_SIZE(inmix_controls)), 107 108 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1), 109 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1), 110 111 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, 112 outmix_controls, ARRAY_SIZE(outmix_controls)), 113 114 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0), 115 116 SND_SOC_DAPM_OUTPUT("VOUT"), 117 118 SND_SOC_DAPM_OUTPUT("HPOUTL"), 119 SND_SOC_DAPM_OUTPUT("HPOUTR"), 120 }; 121 122 static const struct snd_soc_dapm_route routes[] = { 123 { "Input Mixer", "AIN1 Switch", "AIN1" }, 124 { "Input Mixer", "AIN2 Switch", "AIN2" }, 125 { "Input Mixer", "AIN3 Switch", "AIN3" }, 126 { "Input Mixer", "AIN4 Switch", "AIN4" }, 127 { "Input Mixer", "AIN5 Switch", "AIN5" }, 128 129 { "ADC", NULL, "Input Mixer" }, 130 131 { "Output Mixer", "DAC Switch", "DAC" }, 132 { "Output Mixer", "AUX Switch", "AUX" }, 133 { "Output Mixer", "Bypass Switch", "Input Mixer" }, 134 135 { "VOUT", NULL, "Output Mixer" }, 136 137 { "Headphone PGA", NULL, "Output Mixer" }, 138 139 { "HPOUTL", NULL, "Headphone PGA" }, 140 { "HPOUTR", NULL, "Headphone PGA" }, 141 }; 142 143 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 144 { 145 struct snd_soc_codec *codec = dai->codec; 146 int reg, iface, master; 147 148 switch (dai->id) { 149 case WM8776_DAI_DAC: 150 reg = WM8776_DACIFCTRL; 151 master = 0x80; 152 break; 153 case WM8776_DAI_ADC: 154 reg = WM8776_ADCIFCTRL; 155 master = 0x100; 156 break; 157 default: 158 return -EINVAL; 159 } 160 161 iface = 0; 162 163 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 164 case SND_SOC_DAIFMT_CBM_CFM: 165 break; 166 case SND_SOC_DAIFMT_CBS_CFS: 167 master = 0; 168 break; 169 default: 170 return -EINVAL; 171 } 172 173 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 174 case SND_SOC_DAIFMT_I2S: 175 iface |= 0x0002; 176 break; 177 case SND_SOC_DAIFMT_RIGHT_J: 178 break; 179 case SND_SOC_DAIFMT_LEFT_J: 180 iface |= 0x0001; 181 break; 182 /* FIXME: CHECK A/B */ 183 case SND_SOC_DAIFMT_DSP_A: 184 iface |= 0x0003; 185 break; 186 case SND_SOC_DAIFMT_DSP_B: 187 iface |= 0x0007; 188 break; 189 default: 190 return -EINVAL; 191 } 192 193 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 194 case SND_SOC_DAIFMT_NB_NF: 195 break; 196 case SND_SOC_DAIFMT_IB_IF: 197 iface |= 0x00c; 198 break; 199 case SND_SOC_DAIFMT_IB_NF: 200 iface |= 0x008; 201 break; 202 case SND_SOC_DAIFMT_NB_IF: 203 iface |= 0x004; 204 break; 205 default: 206 return -EINVAL; 207 } 208 209 /* Finally, write out the values */ 210 snd_soc_update_bits(codec, reg, 0xf, iface); 211 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master); 212 213 return 0; 214 } 215 216 static int mclk_ratios[] = { 217 128, 218 192, 219 256, 220 384, 221 512, 222 768, 223 }; 224 225 static int wm8776_hw_params(struct snd_pcm_substream *substream, 226 struct snd_pcm_hw_params *params, 227 struct snd_soc_dai *dai) 228 { 229 struct snd_soc_codec *codec = dai->codec; 230 struct wm8776_priv *wm8776 = codec->private_data; 231 int iface_reg, iface; 232 int ratio_shift, master; 233 int i; 234 235 iface = 0; 236 237 switch (dai->id) { 238 case WM8776_DAI_DAC: 239 iface_reg = WM8776_DACIFCTRL; 240 master = 0x80; 241 ratio_shift = 4; 242 break; 243 case WM8776_DAI_ADC: 244 iface_reg = WM8776_ADCIFCTRL; 245 master = 0x100; 246 ratio_shift = 0; 247 break; 248 default: 249 return -EINVAL; 250 } 251 252 253 /* Set word length */ 254 switch (params_format(params)) { 255 case SNDRV_PCM_FORMAT_S16_LE: 256 break; 257 case SNDRV_PCM_FORMAT_S20_3LE: 258 iface |= 0x10; 259 break; 260 case SNDRV_PCM_FORMAT_S24_LE: 261 iface |= 0x20; 262 break; 263 case SNDRV_PCM_FORMAT_S32_LE: 264 iface |= 0x30; 265 break; 266 } 267 268 /* Only need to set MCLK/LRCLK ratio if we're master */ 269 if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) { 270 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) { 271 if (wm8776->sysclk[dai->id] / params_rate(params) 272 == mclk_ratios[i]) 273 break; 274 } 275 276 if (i == ARRAY_SIZE(mclk_ratios)) { 277 dev_err(codec->dev, 278 "Unable to configure MCLK ratio %d/%d\n", 279 wm8776->sysclk[dai->id], params_rate(params)); 280 return -EINVAL; 281 } 282 283 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]); 284 285 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 286 0x7 << ratio_shift, i << ratio_shift); 287 } else { 288 dev_dbg(codec->dev, "DAI in slave mode\n"); 289 } 290 291 snd_soc_update_bits(codec, iface_reg, 0x30, iface); 292 293 return 0; 294 } 295 296 static int wm8776_mute(struct snd_soc_dai *dai, int mute) 297 { 298 struct snd_soc_codec *codec = dai->codec; 299 300 return snd_soc_write(codec, WM8776_DACMUTE, !!mute); 301 } 302 303 static int wm8776_set_sysclk(struct snd_soc_dai *dai, 304 int clk_id, unsigned int freq, int dir) 305 { 306 struct snd_soc_codec *codec = dai->codec; 307 struct wm8776_priv *wm8776 = codec->private_data; 308 309 BUG_ON(dai->id >= ARRAY_SIZE(wm8776->sysclk)); 310 311 wm8776->sysclk[dai->id] = freq; 312 313 return 0; 314 } 315 316 static int wm8776_set_bias_level(struct snd_soc_codec *codec, 317 enum snd_soc_bias_level level) 318 { 319 switch (level) { 320 case SND_SOC_BIAS_ON: 321 break; 322 case SND_SOC_BIAS_PREPARE: 323 break; 324 case SND_SOC_BIAS_STANDBY: 325 if (codec->bias_level == SND_SOC_BIAS_OFF) { 326 /* Disable the global powerdown; DAPM does the rest */ 327 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0); 328 } 329 330 break; 331 case SND_SOC_BIAS_OFF: 332 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1); 333 break; 334 } 335 336 codec->bias_level = level; 337 return 0; 338 } 339 340 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ 341 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ 342 SNDRV_PCM_RATE_96000) 343 344 345 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 346 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 347 348 static struct snd_soc_dai_ops wm8776_dac_ops = { 349 .digital_mute = wm8776_mute, 350 .hw_params = wm8776_hw_params, 351 .set_fmt = wm8776_set_fmt, 352 .set_sysclk = wm8776_set_sysclk, 353 }; 354 355 static struct snd_soc_dai_ops wm8776_adc_ops = { 356 .hw_params = wm8776_hw_params, 357 .set_fmt = wm8776_set_fmt, 358 .set_sysclk = wm8776_set_sysclk, 359 }; 360 361 struct snd_soc_dai wm8776_dai[] = { 362 { 363 .name = "WM8776 Playback", 364 .id = WM8776_DAI_DAC, 365 .playback = { 366 .stream_name = "Playback", 367 .channels_min = 2, 368 .channels_max = 2, 369 .rates = WM8776_RATES, 370 .formats = WM8776_FORMATS, 371 }, 372 .ops = &wm8776_dac_ops, 373 }, 374 { 375 .name = "WM8776 Capture", 376 .id = WM8776_DAI_ADC, 377 .capture = { 378 .stream_name = "Capture", 379 .channels_min = 2, 380 .channels_max = 2, 381 .rates = WM8776_RATES, 382 .formats = WM8776_FORMATS, 383 }, 384 .ops = &wm8776_adc_ops, 385 }, 386 }; 387 EXPORT_SYMBOL_GPL(wm8776_dai); 388 389 #ifdef CONFIG_PM 390 static int wm8776_suspend(struct platform_device *pdev, pm_message_t state) 391 { 392 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 393 struct snd_soc_codec *codec = socdev->card->codec; 394 395 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 396 397 return 0; 398 } 399 400 static int wm8776_resume(struct platform_device *pdev) 401 { 402 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 403 struct snd_soc_codec *codec = socdev->card->codec; 404 int i; 405 u8 data[2]; 406 u16 *cache = codec->reg_cache; 407 408 /* Sync reg_cache with the hardware */ 409 for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) { 410 if (cache[i] == wm8776_reg[i]) 411 continue; 412 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 413 data[1] = cache[i] & 0x00ff; 414 codec->hw_write(codec->control_data, data, 2); 415 } 416 417 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 418 419 return 0; 420 } 421 #else 422 #define wm8776_suspend NULL 423 #define wm8776_resume NULL 424 #endif 425 426 static int wm8776_probe(struct platform_device *pdev) 427 { 428 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 429 struct snd_soc_codec *codec; 430 int ret = 0; 431 432 if (wm8776_codec == NULL) { 433 dev_err(&pdev->dev, "Codec device not registered\n"); 434 return -ENODEV; 435 } 436 437 socdev->card->codec = wm8776_codec; 438 codec = wm8776_codec; 439 440 /* register pcms */ 441 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 442 if (ret < 0) { 443 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 444 goto pcm_err; 445 } 446 447 snd_soc_add_controls(codec, wm8776_snd_controls, 448 ARRAY_SIZE(wm8776_snd_controls)); 449 snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets, 450 ARRAY_SIZE(wm8776_dapm_widgets)); 451 snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes)); 452 453 return ret; 454 455 pcm_err: 456 return ret; 457 } 458 459 /* power down chip */ 460 static int wm8776_remove(struct platform_device *pdev) 461 { 462 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 463 464 snd_soc_free_pcms(socdev); 465 snd_soc_dapm_free(socdev); 466 467 return 0; 468 } 469 470 struct snd_soc_codec_device soc_codec_dev_wm8776 = { 471 .probe = wm8776_probe, 472 .remove = wm8776_remove, 473 .suspend = wm8776_suspend, 474 .resume = wm8776_resume, 475 }; 476 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8776); 477 478 static int wm8776_register(struct wm8776_priv *wm8776, 479 enum snd_soc_control_type control) 480 { 481 int ret, i; 482 struct snd_soc_codec *codec = &wm8776->codec; 483 484 if (wm8776_codec) { 485 dev_err(codec->dev, "Another WM8776 is registered\n"); 486 ret = -EINVAL; 487 goto err; 488 } 489 490 mutex_init(&codec->mutex); 491 INIT_LIST_HEAD(&codec->dapm_widgets); 492 INIT_LIST_HEAD(&codec->dapm_paths); 493 494 codec->private_data = wm8776; 495 codec->name = "WM8776"; 496 codec->owner = THIS_MODULE; 497 codec->bias_level = SND_SOC_BIAS_OFF; 498 codec->set_bias_level = wm8776_set_bias_level; 499 codec->dai = wm8776_dai; 500 codec->num_dai = ARRAY_SIZE(wm8776_dai); 501 codec->reg_cache_size = WM8776_CACHEREGNUM; 502 codec->reg_cache = &wm8776->reg_cache; 503 504 memcpy(codec->reg_cache, wm8776_reg, sizeof(wm8776_reg)); 505 506 ret = snd_soc_codec_set_cache_io(codec, 7, 9, control); 507 if (ret < 0) { 508 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 509 goto err; 510 } 511 512 for (i = 0; i < ARRAY_SIZE(wm8776_dai); i++) 513 wm8776_dai[i].dev = codec->dev; 514 515 ret = wm8776_reset(codec); 516 if (ret < 0) { 517 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 518 goto err; 519 } 520 521 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 522 523 /* Latch the update bits; right channel only since we always 524 * update both. */ 525 snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100); 526 snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100); 527 528 wm8776_codec = codec; 529 530 ret = snd_soc_register_codec(codec); 531 if (ret != 0) { 532 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 533 goto err; 534 } 535 536 ret = snd_soc_register_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai)); 537 if (ret != 0) { 538 dev_err(codec->dev, "Failed to register DAIs: %d\n", ret); 539 goto err_codec; 540 } 541 542 return 0; 543 544 err_codec: 545 snd_soc_unregister_codec(codec); 546 err: 547 kfree(wm8776); 548 return ret; 549 } 550 551 static void wm8776_unregister(struct wm8776_priv *wm8776) 552 { 553 wm8776_set_bias_level(&wm8776->codec, SND_SOC_BIAS_OFF); 554 snd_soc_unregister_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai)); 555 snd_soc_unregister_codec(&wm8776->codec); 556 kfree(wm8776); 557 wm8776_codec = NULL; 558 } 559 560 #if defined(CONFIG_SPI_MASTER) 561 static int wm8776_spi_write(struct spi_device *spi, const char *data, int len) 562 { 563 struct spi_transfer t; 564 struct spi_message m; 565 u8 msg[2]; 566 567 if (len <= 0) 568 return 0; 569 570 msg[0] = data[0]; 571 msg[1] = data[1]; 572 573 spi_message_init(&m); 574 memset(&t, 0, (sizeof t)); 575 576 t.tx_buf = &msg[0]; 577 t.len = len; 578 579 spi_message_add_tail(&t, &m); 580 spi_sync(spi, &m); 581 582 return len; 583 } 584 585 static int __devinit wm8776_spi_probe(struct spi_device *spi) 586 { 587 struct snd_soc_codec *codec; 588 struct wm8776_priv *wm8776; 589 590 wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL); 591 if (wm8776 == NULL) 592 return -ENOMEM; 593 594 codec = &wm8776->codec; 595 codec->control_data = spi; 596 codec->hw_write = (hw_write_t)wm8776_spi_write; 597 codec->dev = &spi->dev; 598 599 dev_set_drvdata(&spi->dev, wm8776); 600 601 return wm8776_register(wm8776, SND_SOC_SPI); 602 } 603 604 static int __devexit wm8776_spi_remove(struct spi_device *spi) 605 { 606 struct wm8776_priv *wm8776 = dev_get_drvdata(&spi->dev); 607 608 wm8776_unregister(wm8776); 609 610 return 0; 611 } 612 613 static struct spi_driver wm8776_spi_driver = { 614 .driver = { 615 .name = "wm8776", 616 .bus = &spi_bus_type, 617 .owner = THIS_MODULE, 618 }, 619 .probe = wm8776_spi_probe, 620 .remove = __devexit_p(wm8776_spi_remove), 621 }; 622 #endif /* CONFIG_SPI_MASTER */ 623 624 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 625 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c, 626 const struct i2c_device_id *id) 627 { 628 struct wm8776_priv *wm8776; 629 struct snd_soc_codec *codec; 630 631 wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL); 632 if (wm8776 == NULL) 633 return -ENOMEM; 634 635 codec = &wm8776->codec; 636 codec->hw_write = (hw_write_t)i2c_master_send; 637 638 i2c_set_clientdata(i2c, wm8776); 639 codec->control_data = i2c; 640 641 codec->dev = &i2c->dev; 642 643 return wm8776_register(wm8776, SND_SOC_I2C); 644 } 645 646 static __devexit int wm8776_i2c_remove(struct i2c_client *client) 647 { 648 struct wm8776_priv *wm8776 = i2c_get_clientdata(client); 649 wm8776_unregister(wm8776); 650 return 0; 651 } 652 653 static const struct i2c_device_id wm8776_i2c_id[] = { 654 { "wm8776", 0 }, 655 { } 656 }; 657 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id); 658 659 static struct i2c_driver wm8776_i2c_driver = { 660 .driver = { 661 .name = "wm8776", 662 .owner = THIS_MODULE, 663 }, 664 .probe = wm8776_i2c_probe, 665 .remove = __devexit_p(wm8776_i2c_remove), 666 .id_table = wm8776_i2c_id, 667 }; 668 #endif 669 670 static int __init wm8776_modinit(void) 671 { 672 int ret; 673 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 674 ret = i2c_add_driver(&wm8776_i2c_driver); 675 if (ret != 0) { 676 printk(KERN_ERR "Failed to register WM8776 I2C driver: %d\n", 677 ret); 678 } 679 #endif 680 #if defined(CONFIG_SPI_MASTER) 681 ret = spi_register_driver(&wm8776_spi_driver); 682 if (ret != 0) { 683 printk(KERN_ERR "Failed to register WM8776 SPI driver: %d\n", 684 ret); 685 } 686 #endif 687 return 0; 688 } 689 module_init(wm8776_modinit); 690 691 static void __exit wm8776_exit(void) 692 { 693 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 694 i2c_del_driver(&wm8776_i2c_driver); 695 #endif 696 #if defined(CONFIG_SPI_MASTER) 697 spi_unregister_driver(&wm8776_spi_driver); 698 #endif 699 } 700 module_exit(wm8776_exit); 701 702 MODULE_DESCRIPTION("ASoC WM8776 driver"); 703 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 704 MODULE_LICENSE("GPL"); 705