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 /* codec private data */ 35 struct wm8776_priv { 36 enum snd_soc_control_type control_type; 37 u16 reg_cache[WM8776_CACHEREGNUM]; 38 int sysclk[2]; 39 }; 40 41 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = { 42 0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */ 43 0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */ 44 0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */ 45 0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */ 46 0xa6, 0x01, 0x01 47 }; 48 49 static int wm8776_reset(struct snd_soc_codec *codec) 50 { 51 return snd_soc_write(codec, WM8776_RESET, 0); 52 } 53 54 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1); 55 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1); 56 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1); 57 58 static const struct snd_kcontrol_new wm8776_snd_controls[] = { 59 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL, 60 0, 127, 0, hp_tlv), 61 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL, 62 0, 255, 0, dac_tlv), 63 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0), 64 65 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0), 66 67 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL, 68 0, 255, 0, adc_tlv), 69 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1), 70 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0), 71 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1), 72 }; 73 74 static const struct snd_kcontrol_new inmix_controls[] = { 75 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0), 76 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0), 77 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0), 78 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0), 79 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0), 80 }; 81 82 static const struct snd_kcontrol_new outmix_controls[] = { 83 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0), 84 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0), 85 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0), 86 }; 87 88 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = { 89 SND_SOC_DAPM_INPUT("AUX"), 90 91 SND_SOC_DAPM_INPUT("AIN1"), 92 SND_SOC_DAPM_INPUT("AIN2"), 93 SND_SOC_DAPM_INPUT("AIN3"), 94 SND_SOC_DAPM_INPUT("AIN4"), 95 SND_SOC_DAPM_INPUT("AIN5"), 96 97 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1, 98 inmix_controls, ARRAY_SIZE(inmix_controls)), 99 100 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1), 101 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1), 102 103 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, 104 outmix_controls, ARRAY_SIZE(outmix_controls)), 105 106 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0), 107 108 SND_SOC_DAPM_OUTPUT("VOUT"), 109 110 SND_SOC_DAPM_OUTPUT("HPOUTL"), 111 SND_SOC_DAPM_OUTPUT("HPOUTR"), 112 }; 113 114 static const struct snd_soc_dapm_route routes[] = { 115 { "Input Mixer", "AIN1 Switch", "AIN1" }, 116 { "Input Mixer", "AIN2 Switch", "AIN2" }, 117 { "Input Mixer", "AIN3 Switch", "AIN3" }, 118 { "Input Mixer", "AIN4 Switch", "AIN4" }, 119 { "Input Mixer", "AIN5 Switch", "AIN5" }, 120 121 { "ADC", NULL, "Input Mixer" }, 122 123 { "Output Mixer", "DAC Switch", "DAC" }, 124 { "Output Mixer", "AUX Switch", "AUX" }, 125 { "Output Mixer", "Bypass Switch", "Input Mixer" }, 126 127 { "VOUT", NULL, "Output Mixer" }, 128 129 { "Headphone PGA", NULL, "Output Mixer" }, 130 131 { "HPOUTL", NULL, "Headphone PGA" }, 132 { "HPOUTR", NULL, "Headphone PGA" }, 133 }; 134 135 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 136 { 137 struct snd_soc_codec *codec = dai->codec; 138 int reg, iface, master; 139 140 switch (dai->driver->id) { 141 case WM8776_DAI_DAC: 142 reg = WM8776_DACIFCTRL; 143 master = 0x80; 144 break; 145 case WM8776_DAI_ADC: 146 reg = WM8776_ADCIFCTRL; 147 master = 0x100; 148 break; 149 default: 150 return -EINVAL; 151 } 152 153 iface = 0; 154 155 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 156 case SND_SOC_DAIFMT_CBM_CFM: 157 break; 158 case SND_SOC_DAIFMT_CBS_CFS: 159 master = 0; 160 break; 161 default: 162 return -EINVAL; 163 } 164 165 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 166 case SND_SOC_DAIFMT_I2S: 167 iface |= 0x0002; 168 break; 169 case SND_SOC_DAIFMT_RIGHT_J: 170 break; 171 case SND_SOC_DAIFMT_LEFT_J: 172 iface |= 0x0001; 173 break; 174 /* FIXME: CHECK A/B */ 175 case SND_SOC_DAIFMT_DSP_A: 176 iface |= 0x0003; 177 break; 178 case SND_SOC_DAIFMT_DSP_B: 179 iface |= 0x0007; 180 break; 181 default: 182 return -EINVAL; 183 } 184 185 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 186 case SND_SOC_DAIFMT_NB_NF: 187 break; 188 case SND_SOC_DAIFMT_IB_IF: 189 iface |= 0x00c; 190 break; 191 case SND_SOC_DAIFMT_IB_NF: 192 iface |= 0x008; 193 break; 194 case SND_SOC_DAIFMT_NB_IF: 195 iface |= 0x004; 196 break; 197 default: 198 return -EINVAL; 199 } 200 201 /* Finally, write out the values */ 202 snd_soc_update_bits(codec, reg, 0xf, iface); 203 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master); 204 205 return 0; 206 } 207 208 static int mclk_ratios[] = { 209 128, 210 192, 211 256, 212 384, 213 512, 214 768, 215 }; 216 217 static int wm8776_hw_params(struct snd_pcm_substream *substream, 218 struct snd_pcm_hw_params *params, 219 struct snd_soc_dai *dai) 220 { 221 struct snd_soc_codec *codec = dai->codec; 222 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 223 int iface_reg, iface; 224 int ratio_shift, master; 225 int i; 226 227 iface = 0; 228 229 switch (dai->driver->id) { 230 case WM8776_DAI_DAC: 231 iface_reg = WM8776_DACIFCTRL; 232 master = 0x80; 233 ratio_shift = 4; 234 break; 235 case WM8776_DAI_ADC: 236 iface_reg = WM8776_ADCIFCTRL; 237 master = 0x100; 238 ratio_shift = 0; 239 break; 240 default: 241 return -EINVAL; 242 } 243 244 245 /* Set word length */ 246 switch (params_format(params)) { 247 case SNDRV_PCM_FORMAT_S16_LE: 248 break; 249 case SNDRV_PCM_FORMAT_S20_3LE: 250 iface |= 0x10; 251 break; 252 case SNDRV_PCM_FORMAT_S24_LE: 253 iface |= 0x20; 254 break; 255 case SNDRV_PCM_FORMAT_S32_LE: 256 iface |= 0x30; 257 break; 258 } 259 260 /* Only need to set MCLK/LRCLK ratio if we're master */ 261 if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) { 262 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) { 263 if (wm8776->sysclk[dai->driver->id] / params_rate(params) 264 == mclk_ratios[i]) 265 break; 266 } 267 268 if (i == ARRAY_SIZE(mclk_ratios)) { 269 dev_err(codec->dev, 270 "Unable to configure MCLK ratio %d/%d\n", 271 wm8776->sysclk[dai->driver->id], params_rate(params)); 272 return -EINVAL; 273 } 274 275 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]); 276 277 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 278 0x7 << ratio_shift, i << ratio_shift); 279 } else { 280 dev_dbg(codec->dev, "DAI in slave mode\n"); 281 } 282 283 snd_soc_update_bits(codec, iface_reg, 0x30, iface); 284 285 return 0; 286 } 287 288 static int wm8776_mute(struct snd_soc_dai *dai, int mute) 289 { 290 struct snd_soc_codec *codec = dai->codec; 291 292 return snd_soc_write(codec, WM8776_DACMUTE, !!mute); 293 } 294 295 static int wm8776_set_sysclk(struct snd_soc_dai *dai, 296 int clk_id, unsigned int freq, int dir) 297 { 298 struct snd_soc_codec *codec = dai->codec; 299 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 300 301 BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)); 302 303 wm8776->sysclk[dai->driver->id] = freq; 304 305 return 0; 306 } 307 308 static int wm8776_set_bias_level(struct snd_soc_codec *codec, 309 enum snd_soc_bias_level level) 310 { 311 switch (level) { 312 case SND_SOC_BIAS_ON: 313 break; 314 case SND_SOC_BIAS_PREPARE: 315 break; 316 case SND_SOC_BIAS_STANDBY: 317 if (codec->bias_level == SND_SOC_BIAS_OFF) { 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->bias_level = level; 329 return 0; 330 } 331 332 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ 333 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ 334 SNDRV_PCM_RATE_96000) 335 336 337 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 338 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 339 340 static struct snd_soc_dai_ops wm8776_dac_ops = { 341 .digital_mute = wm8776_mute, 342 .hw_params = wm8776_hw_params, 343 .set_fmt = wm8776_set_fmt, 344 .set_sysclk = wm8776_set_sysclk, 345 }; 346 347 static struct snd_soc_dai_ops wm8776_adc_ops = { 348 .hw_params = wm8776_hw_params, 349 .set_fmt = wm8776_set_fmt, 350 .set_sysclk = wm8776_set_sysclk, 351 }; 352 353 static struct snd_soc_dai_driver wm8776_dai[] = { 354 { 355 .name = "wm8776-hifi-playback", 356 .id = WM8776_DAI_DAC, 357 .playback = { 358 .stream_name = "Playback", 359 .channels_min = 2, 360 .channels_max = 2, 361 .rates = WM8776_RATES, 362 .formats = WM8776_FORMATS, 363 }, 364 .ops = &wm8776_dac_ops, 365 }, 366 { 367 .name = "wm8776-hifi-capture", 368 .id = WM8776_DAI_ADC, 369 .capture = { 370 .stream_name = "Capture", 371 .channels_min = 2, 372 .channels_max = 2, 373 .rates = WM8776_RATES, 374 .formats = WM8776_FORMATS, 375 }, 376 .ops = &wm8776_adc_ops, 377 }, 378 }; 379 380 #ifdef CONFIG_PM 381 static int wm8776_suspend(struct snd_soc_codec *codec, pm_message_t state) 382 { 383 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 384 385 return 0; 386 } 387 388 static int wm8776_resume(struct snd_soc_codec *codec) 389 { 390 int i; 391 u8 data[2]; 392 u16 *cache = codec->reg_cache; 393 394 /* Sync reg_cache with the hardware */ 395 for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) { 396 if (cache[i] == wm8776_reg[i]) 397 continue; 398 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 399 data[1] = cache[i] & 0x00ff; 400 codec->hw_write(codec->control_data, data, 2); 401 } 402 403 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 404 405 return 0; 406 } 407 #else 408 #define wm8776_suspend NULL 409 #define wm8776_resume NULL 410 #endif 411 412 static int wm8776_probe(struct snd_soc_codec *codec) 413 { 414 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec); 415 int ret = 0; 416 417 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type); 418 if (ret < 0) { 419 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 420 return ret; 421 } 422 423 ret = wm8776_reset(codec); 424 if (ret < 0) { 425 dev_err(codec->dev, "Failed to issue reset: %d\n", ret); 426 return ret; 427 } 428 429 wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 430 431 /* Latch the update bits; right channel only since we always 432 * update both. */ 433 snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100); 434 snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100); 435 436 snd_soc_add_controls(codec, wm8776_snd_controls, 437 ARRAY_SIZE(wm8776_snd_controls)); 438 snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets, 439 ARRAY_SIZE(wm8776_dapm_widgets)); 440 snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes)); 441 442 return ret; 443 } 444 445 /* power down chip */ 446 static int wm8776_remove(struct snd_soc_codec *codec) 447 { 448 wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF); 449 return 0; 450 } 451 452 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = { 453 .probe = wm8776_probe, 454 .remove = wm8776_remove, 455 .suspend = wm8776_suspend, 456 .resume = wm8776_resume, 457 .set_bias_level = wm8776_set_bias_level, 458 .reg_cache_size = sizeof(wm8776_reg), 459 .reg_word_size = sizeof(u16), 460 .reg_cache_default = wm8776_reg, 461 }; 462 463 #if defined(CONFIG_SPI_MASTER) 464 static int __devinit wm8776_spi_probe(struct spi_device *spi) 465 { 466 struct wm8776_priv *wm8776; 467 int ret; 468 469 wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL); 470 if (wm8776 == NULL) 471 return -ENOMEM; 472 473 wm8776->control_type = SND_SOC_SPI; 474 spi_set_drvdata(spi, wm8776); 475 476 ret = snd_soc_register_codec(&spi->dev, 477 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 478 if (ret < 0) 479 kfree(wm8776); 480 return ret; 481 } 482 483 static int __devexit wm8776_spi_remove(struct spi_device *spi) 484 { 485 snd_soc_unregister_codec(&spi->dev); 486 kfree(spi_get_drvdata(spi)); 487 return 0; 488 } 489 490 static struct spi_driver wm8776_spi_driver = { 491 .driver = { 492 .name = "wm8776-codec", 493 .bus = &spi_bus_type, 494 .owner = THIS_MODULE, 495 }, 496 .probe = wm8776_spi_probe, 497 .remove = __devexit_p(wm8776_spi_remove), 498 }; 499 #endif /* CONFIG_SPI_MASTER */ 500 501 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 502 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c, 503 const struct i2c_device_id *id) 504 { 505 struct wm8776_priv *wm8776; 506 int ret; 507 508 wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL); 509 if (wm8776 == NULL) 510 return -ENOMEM; 511 512 i2c_set_clientdata(i2c, wm8776); 513 wm8776->control_type = SND_SOC_I2C; 514 515 ret = snd_soc_register_codec(&i2c->dev, 516 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai)); 517 if (ret < 0) 518 kfree(wm8776); 519 return ret; 520 } 521 522 static __devexit int wm8776_i2c_remove(struct i2c_client *client) 523 { 524 snd_soc_unregister_codec(&client->dev); 525 kfree(i2c_get_clientdata(client)); 526 return 0; 527 } 528 529 static const struct i2c_device_id wm8776_i2c_id[] = { 530 { "wm8776", 0 }, 531 { } 532 }; 533 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id); 534 535 static struct i2c_driver wm8776_i2c_driver = { 536 .driver = { 537 .name = "wm8776-codec", 538 .owner = THIS_MODULE, 539 }, 540 .probe = wm8776_i2c_probe, 541 .remove = __devexit_p(wm8776_i2c_remove), 542 .id_table = wm8776_i2c_id, 543 }; 544 #endif 545 546 static int __init wm8776_modinit(void) 547 { 548 int ret = 0; 549 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 550 ret = i2c_add_driver(&wm8776_i2c_driver); 551 if (ret != 0) { 552 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n", 553 ret); 554 } 555 #endif 556 #if defined(CONFIG_SPI_MASTER) 557 ret = spi_register_driver(&wm8776_spi_driver); 558 if (ret != 0) { 559 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n", 560 ret); 561 } 562 #endif 563 return ret; 564 } 565 module_init(wm8776_modinit); 566 567 static void __exit wm8776_exit(void) 568 { 569 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 570 i2c_del_driver(&wm8776_i2c_driver); 571 #endif 572 #if defined(CONFIG_SPI_MASTER) 573 spi_unregister_driver(&wm8776_spi_driver); 574 #endif 575 } 576 module_exit(wm8776_exit); 577 578 MODULE_DESCRIPTION("ASoC WM8776 driver"); 579 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 580 MODULE_LICENSE("GPL"); 581