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/of_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 enum wm8776_chip_type { 34 WM8775 = 1, 35 WM8776, 36 }; 37 38 /* codec private data */ 39 struct wm8776_priv { 40 enum snd_soc_control_type control_type; 41 int sysclk[2]; 42 }; 43 44 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = { 45 0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */ 46 0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */ 47 0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */ 48 0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */ 49 0xa6, 0x01, 0x01 50 }; 51 52 static int wm8776_reset(struct snd_soc_codec *codec) 53 { 54 return snd_soc_write(codec, WM8776_RESET, 0); 55 } 56 57 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1); 58 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1); 59 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1); 60 61 static const struct snd_kcontrol_new wm8776_snd_controls[] = { 62 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL, 63 0, 127, 0, hp_tlv), 64 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL, 65 0, 255, 0, dac_tlv), 66 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0), 67 68 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0), 69 70 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL, 71 0, 255, 0, adc_tlv), 72 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1), 73 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0), 74 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1), 75 }; 76 77 static const struct snd_kcontrol_new inmix_controls[] = { 78 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0), 79 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0), 80 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0), 81 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0), 82 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0), 83 }; 84 85 static const struct snd_kcontrol_new outmix_controls[] = { 86 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0), 87 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0), 88 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0), 89 }; 90 91 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = { 92 SND_SOC_DAPM_INPUT("AUX"), 93 94 SND_SOC_DAPM_INPUT("AIN1"), 95 SND_SOC_DAPM_INPUT("AIN2"), 96 SND_SOC_DAPM_INPUT("AIN3"), 97 SND_SOC_DAPM_INPUT("AIN4"), 98 SND_SOC_DAPM_INPUT("AIN5"), 99 100 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1, 101 inmix_controls, ARRAY_SIZE(inmix_controls)), 102 103 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1), 104 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1), 105 106 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, 107 outmix_controls, ARRAY_SIZE(outmix_controls)), 108 109 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0), 110 111 SND_SOC_DAPM_OUTPUT("VOUT"), 112 113 SND_SOC_DAPM_OUTPUT("HPOUTL"), 114 SND_SOC_DAPM_OUTPUT("HPOUTR"), 115 }; 116 117 static const struct snd_soc_dapm_route routes[] = { 118 { "Input Mixer", "AIN1 Switch", "AIN1" }, 119 { "Input Mixer", "AIN2 Switch", "AIN2" }, 120 { "Input Mixer", "AIN3 Switch", "AIN3" }, 121 { "Input Mixer", "AIN4 Switch", "AIN4" }, 122 { "Input Mixer", "AIN5 Switch", "AIN5" }, 123 124 { "ADC", NULL, "Input Mixer" }, 125 126 { "Output Mixer", "DAC Switch", "DAC" }, 127 { "Output Mixer", "AUX Switch", "AUX" }, 128 { "Output Mixer", "Bypass Switch", "Input Mixer" }, 129 130 { "VOUT", NULL, "Output Mixer" }, 131 132 { "Headphone PGA", NULL, "Output Mixer" }, 133 134 { "HPOUTL", NULL, "Headphone PGA" }, 135 { "HPOUTR", NULL, "Headphone PGA" }, 136 }; 137 138 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 139 { 140 struct snd_soc_codec *codec = dai->codec; 141 int reg, iface, master; 142 143 switch (dai->driver->id) { 144 case WM8776_DAI_DAC: 145 reg = WM8776_DACIFCTRL; 146 master = 0x80; 147 break; 148 case WM8776_DAI_ADC: 149 reg = WM8776_ADCIFCTRL; 150 master = 0x100; 151 break; 152 default: 153 return -EINVAL; 154 } 155 156 iface = 0; 157 158 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 159 case SND_SOC_DAIFMT_CBM_CFM: 160 break; 161 case SND_SOC_DAIFMT_CBS_CFS: 162 master = 0; 163 break; 164 default: 165 return -EINVAL; 166 } 167 168 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 169 case SND_SOC_DAIFMT_I2S: 170 iface |= 0x0002; 171 break; 172 case SND_SOC_DAIFMT_RIGHT_J: 173 break; 174 case SND_SOC_DAIFMT_LEFT_J: 175 iface |= 0x0001; 176 break; 177 default: 178 return -EINVAL; 179 } 180 181 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 182 case SND_SOC_DAIFMT_NB_NF: 183 break; 184 case SND_SOC_DAIFMT_IB_IF: 185 iface |= 0x00c; 186 break; 187 case SND_SOC_DAIFMT_IB_NF: 188 iface |= 0x008; 189 break; 190 case SND_SOC_DAIFMT_NB_IF: 191 iface |= 0x004; 192 break; 193 default: 194 return -EINVAL; 195 } 196 197 /* Finally, write out the values */ 198 snd_soc_update_bits(codec, reg, 0xf, iface); 199 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master); 200 201 return 0; 202 } 203 204 static int mclk_ratios[] = { 205 128, 206 192, 207 256, 208 384, 209 512, 210 768, 211 }; 212 213 static int wm8776_hw_params(struct snd_pcm_substream *substream, 214 struct snd_pcm_hw_params *params, 215 struct snd_soc_dai *dai) 216 { 217 struct snd_soc_codec *codec = dai->codec; 218 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 219 int iface_reg, iface; 220 int ratio_shift, master; 221 int i; 222 223 switch (dai->driver->id) { 224 case WM8776_DAI_DAC: 225 iface_reg = WM8776_DACIFCTRL; 226 master = 0x80; 227 ratio_shift = 4; 228 break; 229 case WM8776_DAI_ADC: 230 iface_reg = WM8776_ADCIFCTRL; 231 master = 0x100; 232 ratio_shift = 0; 233 break; 234 default: 235 return -EINVAL; 236 } 237 238 /* Set word length */ 239 switch (snd_pcm_format_width(params_format(params))) { 240 case 16: 241 iface = 0; 242 break; 243 case 20: 244 iface = 0x10; 245 break; 246 case 24: 247 iface = 0x20; 248 break; 249 case 32: 250 iface = 0x30; 251 break; 252 default: 253 dev_err(codec->dev, "Unsupported sample size: %i\n", 254 snd_pcm_format_width(params_format(params))); 255 return -EINVAL; 256 } 257 258 /* Only need to set MCLK/LRCLK ratio if we're master */ 259 if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) { 260 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) { 261 if (wm8776->sysclk[dai->driver->id] / params_rate(params) 262 == mclk_ratios[i]) 263 break; 264 } 265 266 if (i == ARRAY_SIZE(mclk_ratios)) { 267 dev_err(codec->dev, 268 "Unable to configure MCLK ratio %d/%d\n", 269 wm8776->sysclk[dai->driver->id], params_rate(params)); 270 return -EINVAL; 271 } 272 273 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]); 274 275 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 276 0x7 << ratio_shift, i << ratio_shift); 277 } else { 278 dev_dbg(codec->dev, "DAI in slave mode\n"); 279 } 280 281 snd_soc_update_bits(codec, iface_reg, 0x30, iface); 282 283 return 0; 284 } 285 286 static int wm8776_mute(struct snd_soc_dai *dai, int mute) 287 { 288 struct snd_soc_codec *codec = dai->codec; 289 290 return snd_soc_write(codec, WM8776_DACMUTE, !!mute); 291 } 292 293 static int wm8776_set_sysclk(struct snd_soc_dai *dai, 294 int clk_id, unsigned int freq, int dir) 295 { 296 struct snd_soc_codec *codec = dai->codec; 297 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 298 299 BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)); 300 301 wm8776->sysclk[dai->driver->id] = freq; 302 303 return 0; 304 } 305 306 static int wm8776_set_bias_level(struct snd_soc_codec *codec, 307 enum snd_soc_bias_level level) 308 { 309 switch (level) { 310 case SND_SOC_BIAS_ON: 311 break; 312 case SND_SOC_BIAS_PREPARE: 313 break; 314 case SND_SOC_BIAS_STANDBY: 315 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 316 snd_soc_cache_sync(codec); 317 318 /* Disable the global powerdown; DAPM does the rest */ 319 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0); 320 } 321 322 break; 323 case SND_SOC_BIAS_OFF: 324 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1); 325 break; 326 } 327 328 codec->dapm.bias_level = level; 329 return 0; 330 } 331 332 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 333 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 334 335 static const struct snd_soc_dai_ops wm8776_dac_ops = { 336 .digital_mute = wm8776_mute, 337 .hw_params = wm8776_hw_params, 338 .set_fmt = wm8776_set_fmt, 339 .set_sysclk = wm8776_set_sysclk, 340 }; 341 342 static const struct snd_soc_dai_ops wm8776_adc_ops = { 343 .hw_params = wm8776_hw_params, 344 .set_fmt = wm8776_set_fmt, 345 .set_sysclk = wm8776_set_sysclk, 346 }; 347 348 static struct snd_soc_dai_driver wm8776_dai[] = { 349 { 350 .name = "wm8776-hifi-playback", 351 .id = WM8776_DAI_DAC, 352 .playback = { 353 .stream_name = "Playback", 354 .channels_min = 2, 355 .channels_max = 2, 356 .rates = SNDRV_PCM_RATE_CONTINUOUS, 357 .rate_min = 32000, 358 .rate_max = 192000, 359 .formats = WM8776_FORMATS, 360 }, 361 .ops = &wm8776_dac_ops, 362 }, 363 { 364 .name = "wm8776-hifi-capture", 365 .id = WM8776_DAI_ADC, 366 .capture = { 367 .stream_name = "Capture", 368 .channels_min = 2, 369 .channels_max = 2, 370 .rates = SNDRV_PCM_RATE_CONTINUOUS, 371 .rate_min = 32000, 372 .rate_max = 96000, 373 .formats = WM8776_FORMATS, 374 }, 375 .ops = &wm8776_adc_ops, 376 }, 377 }; 378 379 #ifdef CONFIG_PM 380 static int wm8776_suspend(struct snd_soc_codec *codec) 381 { 382 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 383 384 return 0; 385 } 386 387 static int wm8776_resume(struct snd_soc_codec *codec) 388 { 389 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 390 return 0; 391 } 392 #else 393 #define wm8776_suspend NULL 394 #define wm8776_resume NULL 395 #endif 396 397 static int wm8776_probe(struct snd_soc_codec *codec) 398 { 399 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 400 int ret = 0; 401 402 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type); 403 if (ret < 0) { 404 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 405 return ret; 406 } 407 408 ret = wm8776_reset(codec); 409 if (ret < 0) { 410 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 411 return ret; 412 } 413 414 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 415 416 /* Latch the update bits; right channel only since we always 417 * update both. */ 418 snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100); 419 snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100); 420 421 return ret; 422 } 423 424 /* power down chip */ 425 static int wm8776_remove(struct snd_soc_codec *codec) 426 { 427 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 428 return 0; 429 } 430 431 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = { 432 .probe = wm8776_probe, 433 .remove = wm8776_remove, 434 .suspend = wm8776_suspend, 435 .resume = wm8776_resume, 436 .set_bias_level = wm8776_set_bias_level, 437 .reg_cache_size = ARRAY_SIZE(wm8776_reg), 438 .reg_word_size = sizeof(u16), 439 .reg_cache_default = wm8776_reg, 440 441 .controls = wm8776_snd_controls, 442 .num_controls = ARRAY_SIZE(wm8776_snd_controls), 443 .dapm_widgets = wm8776_dapm_widgets, 444 .num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets), 445 .dapm_routes = routes, 446 .num_dapm_routes = ARRAY_SIZE(routes), 447 }; 448 449 static const struct of_device_id wm8776_of_match[] = { 450 { .compatible = "wlf,wm8776", }, 451 { } 452 }; 453 MODULE_DEVICE_TABLE(of, wm8776_of_match); 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 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv), 462 GFP_KERNEL); 463 if (wm8776 == NULL) 464 return -ENOMEM; 465 466 wm8776->control_type = SND_SOC_SPI; 467 spi_set_drvdata(spi, wm8776); 468 469 ret = snd_soc_register_codec(&spi->dev, 470 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 471 472 return ret; 473 } 474 475 static int __devexit wm8776_spi_remove(struct spi_device *spi) 476 { 477 snd_soc_unregister_codec(&spi->dev); 478 return 0; 479 } 480 481 static struct spi_driver wm8776_spi_driver = { 482 .driver = { 483 .name = "wm8776", 484 .owner = THIS_MODULE, 485 .of_match_table = wm8776_of_match, 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 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv), 500 GFP_KERNEL); 501 if (wm8776 == NULL) 502 return -ENOMEM; 503 504 i2c_set_clientdata(i2c, wm8776); 505 wm8776->control_type = SND_SOC_I2C; 506 507 ret = snd_soc_register_codec(&i2c->dev, 508 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 509 510 return ret; 511 } 512 513 static __devexit int wm8776_i2c_remove(struct i2c_client *client) 514 { 515 snd_soc_unregister_codec(&client->dev); 516 return 0; 517 } 518 519 static const struct i2c_device_id wm8776_i2c_id[] = { 520 { "wm8775", WM8775 }, 521 { "wm8776", WM8776 }, 522 { } 523 }; 524 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id); 525 526 static struct i2c_driver wm8776_i2c_driver = { 527 .driver = { 528 .name = "wm8776", 529 .owner = THIS_MODULE, 530 .of_match_table = wm8776_of_match, 531 }, 532 .probe = wm8776_i2c_probe, 533 .remove = __devexit_p(wm8776_i2c_remove), 534 .id_table = wm8776_i2c_id, 535 }; 536 #endif 537 538 static int __init wm8776_modinit(void) 539 { 540 int ret = 0; 541 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 542 ret = i2c_add_driver(&wm8776_i2c_driver); 543 if (ret != 0) { 544 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n", 545 ret); 546 } 547 #endif 548 #if defined(CONFIG_SPI_MASTER) 549 ret = spi_register_driver(&wm8776_spi_driver); 550 if (ret != 0) { 551 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n", 552 ret); 553 } 554 #endif 555 return ret; 556 } 557 module_init(wm8776_modinit); 558 559 static void __exit wm8776_exit(void) 560 { 561 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 562 i2c_del_driver(&wm8776_i2c_driver); 563 #endif 564 #if defined(CONFIG_SPI_MASTER) 565 spi_unregister_driver(&wm8776_spi_driver); 566 #endif 567 } 568 module_exit(wm8776_exit); 569 570 MODULE_DESCRIPTION("ASoC WM8776 driver"); 571 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 572 MODULE_LICENSE("GPL"); 573