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/initval.h> 29 #include <sound/tlv.h> 30 31 #include "wm8776.h" 32 33 /* codec private data */ 34 struct wm8776_priv { 35 enum snd_soc_control_type control_type; 36 int sysclk[2]; 37 }; 38 39 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = { 40 0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */ 41 0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */ 42 0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */ 43 0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */ 44 0xa6, 0x01, 0x01 45 }; 46 47 static int wm8776_reset(struct snd_soc_codec *codec) 48 { 49 return snd_soc_write(codec, WM8776_RESET, 0); 50 } 51 52 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1); 53 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1); 54 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1); 55 56 static const struct snd_kcontrol_new wm8776_snd_controls[] = { 57 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL, 58 0, 127, 0, hp_tlv), 59 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL, 60 0, 255, 0, dac_tlv), 61 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0), 62 63 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0), 64 65 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL, 66 0, 255, 0, adc_tlv), 67 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1), 68 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0), 69 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1), 70 }; 71 72 static const struct snd_kcontrol_new inmix_controls[] = { 73 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0), 74 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0), 75 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0), 76 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0), 77 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0), 78 }; 79 80 static const struct snd_kcontrol_new outmix_controls[] = { 81 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0), 82 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0), 83 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0), 84 }; 85 86 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = { 87 SND_SOC_DAPM_INPUT("AUX"), 88 89 SND_SOC_DAPM_INPUT("AIN1"), 90 SND_SOC_DAPM_INPUT("AIN2"), 91 SND_SOC_DAPM_INPUT("AIN3"), 92 SND_SOC_DAPM_INPUT("AIN4"), 93 SND_SOC_DAPM_INPUT("AIN5"), 94 95 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1, 96 inmix_controls, ARRAY_SIZE(inmix_controls)), 97 98 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1), 99 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1), 100 101 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, 102 outmix_controls, ARRAY_SIZE(outmix_controls)), 103 104 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0), 105 106 SND_SOC_DAPM_OUTPUT("VOUT"), 107 108 SND_SOC_DAPM_OUTPUT("HPOUTL"), 109 SND_SOC_DAPM_OUTPUT("HPOUTR"), 110 }; 111 112 static const struct snd_soc_dapm_route routes[] = { 113 { "Input Mixer", "AIN1 Switch", "AIN1" }, 114 { "Input Mixer", "AIN2 Switch", "AIN2" }, 115 { "Input Mixer", "AIN3 Switch", "AIN3" }, 116 { "Input Mixer", "AIN4 Switch", "AIN4" }, 117 { "Input Mixer", "AIN5 Switch", "AIN5" }, 118 119 { "ADC", NULL, "Input Mixer" }, 120 121 { "Output Mixer", "DAC Switch", "DAC" }, 122 { "Output Mixer", "AUX Switch", "AUX" }, 123 { "Output Mixer", "Bypass Switch", "Input Mixer" }, 124 125 { "VOUT", NULL, "Output Mixer" }, 126 127 { "Headphone PGA", NULL, "Output Mixer" }, 128 129 { "HPOUTL", NULL, "Headphone PGA" }, 130 { "HPOUTR", NULL, "Headphone PGA" }, 131 }; 132 133 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 134 { 135 struct snd_soc_codec *codec = dai->codec; 136 int reg, iface, master; 137 138 switch (dai->driver->id) { 139 case WM8776_DAI_DAC: 140 reg = WM8776_DACIFCTRL; 141 master = 0x80; 142 break; 143 case WM8776_DAI_ADC: 144 reg = WM8776_ADCIFCTRL; 145 master = 0x100; 146 break; 147 default: 148 return -EINVAL; 149 } 150 151 iface = 0; 152 153 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 154 case SND_SOC_DAIFMT_CBM_CFM: 155 break; 156 case SND_SOC_DAIFMT_CBS_CFS: 157 master = 0; 158 break; 159 default: 160 return -EINVAL; 161 } 162 163 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 164 case SND_SOC_DAIFMT_I2S: 165 iface |= 0x0002; 166 break; 167 case SND_SOC_DAIFMT_RIGHT_J: 168 break; 169 case SND_SOC_DAIFMT_LEFT_J: 170 iface |= 0x0001; 171 break; 172 default: 173 return -EINVAL; 174 } 175 176 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 177 case SND_SOC_DAIFMT_NB_NF: 178 break; 179 case SND_SOC_DAIFMT_IB_IF: 180 iface |= 0x00c; 181 break; 182 case SND_SOC_DAIFMT_IB_NF: 183 iface |= 0x008; 184 break; 185 case SND_SOC_DAIFMT_NB_IF: 186 iface |= 0x004; 187 break; 188 default: 189 return -EINVAL; 190 } 191 192 /* Finally, write out the values */ 193 snd_soc_update_bits(codec, reg, 0xf, iface); 194 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master); 195 196 return 0; 197 } 198 199 static int mclk_ratios[] = { 200 128, 201 192, 202 256, 203 384, 204 512, 205 768, 206 }; 207 208 static int wm8776_hw_params(struct snd_pcm_substream *substream, 209 struct snd_pcm_hw_params *params, 210 struct snd_soc_dai *dai) 211 { 212 struct snd_soc_codec *codec = dai->codec; 213 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 214 int iface_reg, iface; 215 int ratio_shift, master; 216 int i; 217 218 iface = 0; 219 220 switch (dai->driver->id) { 221 case WM8776_DAI_DAC: 222 iface_reg = WM8776_DACIFCTRL; 223 master = 0x80; 224 ratio_shift = 4; 225 break; 226 case WM8776_DAI_ADC: 227 iface_reg = WM8776_ADCIFCTRL; 228 master = 0x100; 229 ratio_shift = 0; 230 break; 231 default: 232 return -EINVAL; 233 } 234 235 236 /* Set word length */ 237 switch (params_format(params)) { 238 case SNDRV_PCM_FORMAT_S16_LE: 239 break; 240 case SNDRV_PCM_FORMAT_S20_3LE: 241 iface |= 0x10; 242 break; 243 case SNDRV_PCM_FORMAT_S24_LE: 244 iface |= 0x20; 245 break; 246 case SNDRV_PCM_FORMAT_S32_LE: 247 iface |= 0x30; 248 break; 249 } 250 251 /* Only need to set MCLK/LRCLK ratio if we're master */ 252 if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) { 253 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) { 254 if (wm8776->sysclk[dai->driver->id] / params_rate(params) 255 == mclk_ratios[i]) 256 break; 257 } 258 259 if (i == ARRAY_SIZE(mclk_ratios)) { 260 dev_err(codec->dev, 261 "Unable to configure MCLK ratio %d/%d\n", 262 wm8776->sysclk[dai->driver->id], params_rate(params)); 263 return -EINVAL; 264 } 265 266 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]); 267 268 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 269 0x7 << ratio_shift, i << ratio_shift); 270 } else { 271 dev_dbg(codec->dev, "DAI in slave mode\n"); 272 } 273 274 snd_soc_update_bits(codec, iface_reg, 0x30, iface); 275 276 return 0; 277 } 278 279 static int wm8776_mute(struct snd_soc_dai *dai, int mute) 280 { 281 struct snd_soc_codec *codec = dai->codec; 282 283 return snd_soc_write(codec, WM8776_DACMUTE, !!mute); 284 } 285 286 static int wm8776_set_sysclk(struct snd_soc_dai *dai, 287 int clk_id, unsigned int freq, int dir) 288 { 289 struct snd_soc_codec *codec = dai->codec; 290 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 291 292 BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)); 293 294 wm8776->sysclk[dai->driver->id] = freq; 295 296 return 0; 297 } 298 299 static int wm8776_set_bias_level(struct snd_soc_codec *codec, 300 enum snd_soc_bias_level level) 301 { 302 switch (level) { 303 case SND_SOC_BIAS_ON: 304 break; 305 case SND_SOC_BIAS_PREPARE: 306 break; 307 case SND_SOC_BIAS_STANDBY: 308 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 309 /* Disable the global powerdown; DAPM does the rest */ 310 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0); 311 } 312 313 break; 314 case SND_SOC_BIAS_OFF: 315 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1); 316 break; 317 } 318 319 codec->dapm.bias_level = level; 320 return 0; 321 } 322 323 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ 324 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ 325 SNDRV_PCM_RATE_96000) 326 327 328 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 329 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 330 331 static struct snd_soc_dai_ops wm8776_dac_ops = { 332 .digital_mute = wm8776_mute, 333 .hw_params = wm8776_hw_params, 334 .set_fmt = wm8776_set_fmt, 335 .set_sysclk = wm8776_set_sysclk, 336 }; 337 338 static struct snd_soc_dai_ops wm8776_adc_ops = { 339 .hw_params = wm8776_hw_params, 340 .set_fmt = wm8776_set_fmt, 341 .set_sysclk = wm8776_set_sysclk, 342 }; 343 344 static struct snd_soc_dai_driver wm8776_dai[] = { 345 { 346 .name = "wm8776-hifi-playback", 347 .id = WM8776_DAI_DAC, 348 .playback = { 349 .stream_name = "Playback", 350 .channels_min = 2, 351 .channels_max = 2, 352 .rates = WM8776_RATES, 353 .formats = WM8776_FORMATS, 354 }, 355 .ops = &wm8776_dac_ops, 356 }, 357 { 358 .name = "wm8776-hifi-capture", 359 .id = WM8776_DAI_ADC, 360 .capture = { 361 .stream_name = "Capture", 362 .channels_min = 2, 363 .channels_max = 2, 364 .rates = WM8776_RATES, 365 .formats = WM8776_FORMATS, 366 }, 367 .ops = &wm8776_adc_ops, 368 }, 369 }; 370 371 #ifdef CONFIG_PM 372 static int wm8776_suspend(struct snd_soc_codec *codec, pm_message_t state) 373 { 374 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 375 376 return 0; 377 } 378 379 static int wm8776_resume(struct snd_soc_codec *codec) 380 { 381 int i; 382 u8 data[2]; 383 u16 *cache = codec->reg_cache; 384 385 /* Sync reg_cache with the hardware */ 386 for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) { 387 if (cache[i] == wm8776_reg[i]) 388 continue; 389 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 390 data[1] = cache[i] & 0x00ff; 391 codec->hw_write(codec->control_data, data, 2); 392 } 393 394 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 395 396 return 0; 397 } 398 #else 399 #define wm8776_suspend NULL 400 #define wm8776_resume NULL 401 #endif 402 403 static int wm8776_probe(struct snd_soc_codec *codec) 404 { 405 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 406 struct snd_soc_dapm_context *dapm = &codec->dapm; 407 int ret = 0; 408 409 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type); 410 if (ret < 0) { 411 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 412 return ret; 413 } 414 415 ret = wm8776_reset(codec); 416 if (ret < 0) { 417 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 418 return ret; 419 } 420 421 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 422 423 /* Latch the update bits; right channel only since we always 424 * update both. */ 425 snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100); 426 snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100); 427 428 snd_soc_add_controls(codec, wm8776_snd_controls, 429 ARRAY_SIZE(wm8776_snd_controls)); 430 snd_soc_dapm_new_controls(dapm, wm8776_dapm_widgets, 431 ARRAY_SIZE(wm8776_dapm_widgets)); 432 snd_soc_dapm_add_routes(dapm, routes, ARRAY_SIZE(routes)); 433 434 return ret; 435 } 436 437 /* power down chip */ 438 static int wm8776_remove(struct snd_soc_codec *codec) 439 { 440 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 441 return 0; 442 } 443 444 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = { 445 .probe = wm8776_probe, 446 .remove = wm8776_remove, 447 .suspend = wm8776_suspend, 448 .resume = wm8776_resume, 449 .set_bias_level = wm8776_set_bias_level, 450 .reg_cache_size = ARRAY_SIZE(wm8776_reg), 451 .reg_word_size = sizeof(u16), 452 .reg_cache_default = wm8776_reg, 453 }; 454 455 #if defined(CONFIG_SPI_MASTER) 456 static int __devinit wm8776_spi_probe(struct spi_device *spi) 457 { 458 struct wm8776_priv *wm8776; 459 int ret; 460 461 wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL); 462 if (wm8776 == NULL) 463 return -ENOMEM; 464 465 wm8776->control_type = SND_SOC_SPI; 466 spi_set_drvdata(spi, wm8776); 467 468 ret = snd_soc_register_codec(&spi->dev, 469 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 470 if (ret < 0) 471 kfree(wm8776); 472 return ret; 473 } 474 475 static int __devexit wm8776_spi_remove(struct spi_device *spi) 476 { 477 snd_soc_unregister_codec(&spi->dev); 478 kfree(spi_get_drvdata(spi)); 479 return 0; 480 } 481 482 static struct spi_driver wm8776_spi_driver = { 483 .driver = { 484 .name = "wm8776-codec", 485 .owner = THIS_MODULE, 486 }, 487 .probe = wm8776_spi_probe, 488 .remove = __devexit_p(wm8776_spi_remove), 489 }; 490 #endif /* CONFIG_SPI_MASTER */ 491 492 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 493 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c, 494 const struct i2c_device_id *id) 495 { 496 struct wm8776_priv *wm8776; 497 int ret; 498 499 wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL); 500 if (wm8776 == NULL) 501 return -ENOMEM; 502 503 i2c_set_clientdata(i2c, wm8776); 504 wm8776->control_type = SND_SOC_I2C; 505 506 ret = snd_soc_register_codec(&i2c->dev, 507 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 508 if (ret < 0) 509 kfree(wm8776); 510 return ret; 511 } 512 513 static __devexit int wm8776_i2c_remove(struct i2c_client *client) 514 { 515 snd_soc_unregister_codec(&client->dev); 516 kfree(i2c_get_clientdata(client)); 517 return 0; 518 } 519 520 static const struct i2c_device_id wm8776_i2c_id[] = { 521 { "wm8776", 0 }, 522 { } 523 }; 524 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id); 525 526 static struct i2c_driver wm8776_i2c_driver = { 527 .driver = { 528 .name = "wm8776-codec", 529 .owner = THIS_MODULE, 530 }, 531 .probe = wm8776_i2c_probe, 532 .remove = __devexit_p(wm8776_i2c_remove), 533 .id_table = wm8776_i2c_id, 534 }; 535 #endif 536 537 static int __init wm8776_modinit(void) 538 { 539 int ret = 0; 540 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 541 ret = i2c_add_driver(&wm8776_i2c_driver); 542 if (ret != 0) { 543 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n", 544 ret); 545 } 546 #endif 547 #if defined(CONFIG_SPI_MASTER) 548 ret = spi_register_driver(&wm8776_spi_driver); 549 if (ret != 0) { 550 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n", 551 ret); 552 } 553 #endif 554 return ret; 555 } 556 module_init(wm8776_modinit); 557 558 static void __exit wm8776_exit(void) 559 { 560 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 561 i2c_del_driver(&wm8776_i2c_driver); 562 #endif 563 #if defined(CONFIG_SPI_MASTER) 564 spi_unregister_driver(&wm8776_spi_driver); 565 #endif 566 } 567 module_exit(wm8776_exit); 568 569 MODULE_DESCRIPTION("ASoC WM8776 driver"); 570 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 571 MODULE_LICENSE("GPL"); 572