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 /* 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 switch (dai->driver->id) { 219 case WM8776_DAI_DAC: 220 iface_reg = WM8776_DACIFCTRL; 221 master = 0x80; 222 ratio_shift = 4; 223 break; 224 case WM8776_DAI_ADC: 225 iface_reg = WM8776_ADCIFCTRL; 226 master = 0x100; 227 ratio_shift = 0; 228 break; 229 default: 230 return -EINVAL; 231 } 232 233 /* Set word length */ 234 switch (snd_pcm_format_width(params_format(params))) { 235 case 16: 236 iface = 0; 237 break; 238 case 20: 239 iface = 0x10; 240 break; 241 case 24: 242 iface = 0x20; 243 break; 244 case 32: 245 iface = 0x30; 246 break; 247 default: 248 dev_err(codec->dev, "Unsupported sample size: %i\n", 249 snd_pcm_format_width(params_format(params))); 250 return -EINVAL; 251 } 252 253 /* Only need to set MCLK/LRCLK ratio if we're master */ 254 if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) { 255 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) { 256 if (wm8776->sysclk[dai->driver->id] / params_rate(params) 257 == mclk_ratios[i]) 258 break; 259 } 260 261 if (i == ARRAY_SIZE(mclk_ratios)) { 262 dev_err(codec->dev, 263 "Unable to configure MCLK ratio %d/%d\n", 264 wm8776->sysclk[dai->driver->id], params_rate(params)); 265 return -EINVAL; 266 } 267 268 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]); 269 270 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 271 0x7 << ratio_shift, i << ratio_shift); 272 } else { 273 dev_dbg(codec->dev, "DAI in slave mode\n"); 274 } 275 276 snd_soc_update_bits(codec, iface_reg, 0x30, iface); 277 278 return 0; 279 } 280 281 static int wm8776_mute(struct snd_soc_dai *dai, int mute) 282 { 283 struct snd_soc_codec *codec = dai->codec; 284 285 return snd_soc_write(codec, WM8776_DACMUTE, !!mute); 286 } 287 288 static int wm8776_set_sysclk(struct snd_soc_dai *dai, 289 int clk_id, unsigned int freq, int dir) 290 { 291 struct snd_soc_codec *codec = dai->codec; 292 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 293 294 BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)); 295 296 wm8776->sysclk[dai->driver->id] = freq; 297 298 return 0; 299 } 300 301 static int wm8776_set_bias_level(struct snd_soc_codec *codec, 302 enum snd_soc_bias_level level) 303 { 304 switch (level) { 305 case SND_SOC_BIAS_ON: 306 break; 307 case SND_SOC_BIAS_PREPARE: 308 break; 309 case SND_SOC_BIAS_STANDBY: 310 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 311 snd_soc_cache_sync(codec); 312 313 /* Disable the global powerdown; DAPM does the rest */ 314 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0); 315 } 316 317 break; 318 case SND_SOC_BIAS_OFF: 319 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1); 320 break; 321 } 322 323 codec->dapm.bias_level = level; 324 return 0; 325 } 326 327 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 328 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 329 330 static const struct snd_soc_dai_ops wm8776_dac_ops = { 331 .digital_mute = wm8776_mute, 332 .hw_params = wm8776_hw_params, 333 .set_fmt = wm8776_set_fmt, 334 .set_sysclk = wm8776_set_sysclk, 335 }; 336 337 static const struct snd_soc_dai_ops wm8776_adc_ops = { 338 .hw_params = wm8776_hw_params, 339 .set_fmt = wm8776_set_fmt, 340 .set_sysclk = wm8776_set_sysclk, 341 }; 342 343 static struct snd_soc_dai_driver wm8776_dai[] = { 344 { 345 .name = "wm8776-hifi-playback", 346 .id = WM8776_DAI_DAC, 347 .playback = { 348 .stream_name = "Playback", 349 .channels_min = 2, 350 .channels_max = 2, 351 .rates = SNDRV_PCM_RATE_CONTINUOUS, 352 .rate_min = 32000, 353 .rate_max = 192000, 354 .formats = WM8776_FORMATS, 355 }, 356 .ops = &wm8776_dac_ops, 357 }, 358 { 359 .name = "wm8776-hifi-capture", 360 .id = WM8776_DAI_ADC, 361 .capture = { 362 .stream_name = "Capture", 363 .channels_min = 2, 364 .channels_max = 2, 365 .rates = SNDRV_PCM_RATE_CONTINUOUS, 366 .rate_min = 32000, 367 .rate_max = 96000, 368 .formats = WM8776_FORMATS, 369 }, 370 .ops = &wm8776_adc_ops, 371 }, 372 }; 373 374 #ifdef CONFIG_PM 375 static int wm8776_suspend(struct snd_soc_codec *codec) 376 { 377 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 378 379 return 0; 380 } 381 382 static int wm8776_resume(struct snd_soc_codec *codec) 383 { 384 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 385 return 0; 386 } 387 #else 388 #define wm8776_suspend NULL 389 #define wm8776_resume NULL 390 #endif 391 392 static int wm8776_probe(struct snd_soc_codec *codec) 393 { 394 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 395 int ret = 0; 396 397 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type); 398 if (ret < 0) { 399 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 400 return ret; 401 } 402 403 ret = wm8776_reset(codec); 404 if (ret < 0) { 405 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 406 return ret; 407 } 408 409 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 410 411 /* Latch the update bits; right channel only since we always 412 * update both. */ 413 snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100); 414 snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100); 415 416 return ret; 417 } 418 419 /* power down chip */ 420 static int wm8776_remove(struct snd_soc_codec *codec) 421 { 422 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 423 return 0; 424 } 425 426 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = { 427 .probe = wm8776_probe, 428 .remove = wm8776_remove, 429 .suspend = wm8776_suspend, 430 .resume = wm8776_resume, 431 .set_bias_level = wm8776_set_bias_level, 432 .reg_cache_size = ARRAY_SIZE(wm8776_reg), 433 .reg_word_size = sizeof(u16), 434 .reg_cache_default = wm8776_reg, 435 436 .controls = wm8776_snd_controls, 437 .num_controls = ARRAY_SIZE(wm8776_snd_controls), 438 .dapm_widgets = wm8776_dapm_widgets, 439 .num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets), 440 .dapm_routes = routes, 441 .num_dapm_routes = ARRAY_SIZE(routes), 442 }; 443 444 static const struct of_device_id wm8776_of_match[] = { 445 { .compatible = "wlf,wm8776", }, 446 { } 447 }; 448 MODULE_DEVICE_TABLE(of, wm8776_of_match); 449 450 #if defined(CONFIG_SPI_MASTER) 451 static int __devinit wm8776_spi_probe(struct spi_device *spi) 452 { 453 struct wm8776_priv *wm8776; 454 int ret; 455 456 wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv), 457 GFP_KERNEL); 458 if (wm8776 == NULL) 459 return -ENOMEM; 460 461 wm8776->control_type = SND_SOC_SPI; 462 spi_set_drvdata(spi, wm8776); 463 464 ret = snd_soc_register_codec(&spi->dev, 465 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 466 467 return ret; 468 } 469 470 static int __devexit wm8776_spi_remove(struct spi_device *spi) 471 { 472 snd_soc_unregister_codec(&spi->dev); 473 return 0; 474 } 475 476 static struct spi_driver wm8776_spi_driver = { 477 .driver = { 478 .name = "wm8776", 479 .owner = THIS_MODULE, 480 .of_match_table = wm8776_of_match, 481 }, 482 .probe = wm8776_spi_probe, 483 .remove = __devexit_p(wm8776_spi_remove), 484 }; 485 #endif /* CONFIG_SPI_MASTER */ 486 487 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 488 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c, 489 const struct i2c_device_id *id) 490 { 491 struct wm8776_priv *wm8776; 492 int ret; 493 494 wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv), 495 GFP_KERNEL); 496 if (wm8776 == NULL) 497 return -ENOMEM; 498 499 i2c_set_clientdata(i2c, wm8776); 500 wm8776->control_type = SND_SOC_I2C; 501 502 ret = snd_soc_register_codec(&i2c->dev, 503 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 504 505 return ret; 506 } 507 508 static __devexit int wm8776_i2c_remove(struct i2c_client *client) 509 { 510 snd_soc_unregister_codec(&client->dev); 511 return 0; 512 } 513 514 static const struct i2c_device_id wm8776_i2c_id[] = { 515 { "wm8776", 0 }, 516 { } 517 }; 518 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id); 519 520 static struct i2c_driver wm8776_i2c_driver = { 521 .driver = { 522 .name = "wm8776", 523 .owner = THIS_MODULE, 524 .of_match_table = wm8776_of_match, 525 }, 526 .probe = wm8776_i2c_probe, 527 .remove = __devexit_p(wm8776_i2c_remove), 528 .id_table = wm8776_i2c_id, 529 }; 530 #endif 531 532 static int __init wm8776_modinit(void) 533 { 534 int ret = 0; 535 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 536 ret = i2c_add_driver(&wm8776_i2c_driver); 537 if (ret != 0) { 538 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n", 539 ret); 540 } 541 #endif 542 #if defined(CONFIG_SPI_MASTER) 543 ret = spi_register_driver(&wm8776_spi_driver); 544 if (ret != 0) { 545 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n", 546 ret); 547 } 548 #endif 549 return ret; 550 } 551 module_init(wm8776_modinit); 552 553 static void __exit wm8776_exit(void) 554 { 555 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 556 i2c_del_driver(&wm8776_i2c_driver); 557 #endif 558 #if defined(CONFIG_SPI_MASTER) 559 spi_unregister_driver(&wm8776_spi_driver); 560 #endif 561 } 562 module_exit(wm8776_exit); 563 564 MODULE_DESCRIPTION("ASoC WM8776 driver"); 565 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 566 MODULE_LICENSE("GPL"); 567