1 /* 2 * wm8711.c -- WM8711 ALSA SoC Audio driver 3 * 4 * Copyright 2006 Wolfson Microelectronics 5 * 6 * Author: Mike Arthur <Mike.Arthur@wolfsonmicro.com> 7 * 8 * Based on wm8731.c by Richard Purdie 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 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/spi/spi.h> 22 #include <linux/slab.h> 23 #include <linux/of_device.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/tlv.h> 29 #include <sound/initval.h> 30 31 #include "wm8711.h" 32 33 /* codec private data */ 34 struct wm8711_priv { 35 enum snd_soc_control_type bus_type; 36 unsigned int sysclk; 37 }; 38 39 /* 40 * wm8711 register cache 41 * We can't read the WM8711 register space when we are 42 * using 2 wire for device control, so we cache them instead. 43 * There is no point in caching the reset register 44 */ 45 static const u16 wm8711_reg[WM8711_CACHEREGNUM] = { 46 0x0079, 0x0079, 0x000a, 0x0008, 47 0x009f, 0x000a, 0x0000, 0x0000 48 }; 49 50 #define wm8711_reset(c) snd_soc_write(c, WM8711_RESET, 0) 51 52 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 53 54 static const struct snd_kcontrol_new wm8711_snd_controls[] = { 55 56 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V, 57 0, 127, 0, out_tlv), 58 SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V, 59 7, 1, 0), 60 61 }; 62 63 /* Output Mixer */ 64 static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = { 65 SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0), 66 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0), 67 }; 68 69 static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = { 70 SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1, 71 &wm8711_output_mixer_controls[0], 72 ARRAY_SIZE(wm8711_output_mixer_controls)), 73 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1), 74 SND_SOC_DAPM_OUTPUT("LOUT"), 75 SND_SOC_DAPM_OUTPUT("LHPOUT"), 76 SND_SOC_DAPM_OUTPUT("ROUT"), 77 SND_SOC_DAPM_OUTPUT("RHPOUT"), 78 }; 79 80 static const struct snd_soc_dapm_route wm8711_intercon[] = { 81 /* output mixer */ 82 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 83 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 84 85 /* outputs */ 86 {"RHPOUT", NULL, "Output Mixer"}, 87 {"ROUT", NULL, "Output Mixer"}, 88 {"LHPOUT", NULL, "Output Mixer"}, 89 {"LOUT", NULL, "Output Mixer"}, 90 }; 91 92 struct _coeff_div { 93 u32 mclk; 94 u32 rate; 95 u16 fs; 96 u8 sr:4; 97 u8 bosr:1; 98 u8 usb:1; 99 }; 100 101 /* codec mclk clock divider coefficients */ 102 static const struct _coeff_div coeff_div[] = { 103 /* 48k */ 104 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 105 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 106 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 107 108 /* 32k */ 109 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 110 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 111 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 112 113 /* 8k */ 114 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 115 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 116 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 117 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 118 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 119 120 /* 96k */ 121 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 122 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 123 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 124 125 /* 44.1k */ 126 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 127 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 128 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 129 130 /* 88.2k */ 131 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 132 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 133 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 134 }; 135 136 static inline int get_coeff(int mclk, int rate) 137 { 138 int i; 139 140 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 141 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 142 return i; 143 } 144 return 0; 145 } 146 147 static int wm8711_hw_params(struct snd_pcm_substream *substream, 148 struct snd_pcm_hw_params *params, 149 struct snd_soc_dai *dai) 150 { 151 struct snd_soc_codec *codec = dai->codec; 152 struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec); 153 u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfff3; 154 int i = get_coeff(wm8711->sysclk, params_rate(params)); 155 u16 srate = (coeff_div[i].sr << 2) | 156 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 157 158 snd_soc_write(codec, WM8711_SRATE, srate); 159 160 /* bit size */ 161 switch (params_format(params)) { 162 case SNDRV_PCM_FORMAT_S16_LE: 163 break; 164 case SNDRV_PCM_FORMAT_S20_3LE: 165 iface |= 0x0004; 166 break; 167 case SNDRV_PCM_FORMAT_S24_LE: 168 iface |= 0x0008; 169 break; 170 } 171 172 snd_soc_write(codec, WM8711_IFACE, iface); 173 return 0; 174 } 175 176 static int wm8711_pcm_prepare(struct snd_pcm_substream *substream, 177 struct snd_soc_dai *dai) 178 { 179 struct snd_soc_codec *codec = dai->codec; 180 181 /* set active */ 182 snd_soc_write(codec, WM8711_ACTIVE, 0x0001); 183 184 return 0; 185 } 186 187 static void wm8711_shutdown(struct snd_pcm_substream *substream, 188 struct snd_soc_dai *dai) 189 { 190 struct snd_soc_codec *codec = dai->codec; 191 192 /* deactivate */ 193 if (!codec->active) { 194 udelay(50); 195 snd_soc_write(codec, WM8711_ACTIVE, 0x0); 196 } 197 } 198 199 static int wm8711_mute(struct snd_soc_dai *dai, int mute) 200 { 201 struct snd_soc_codec *codec = dai->codec; 202 u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7; 203 204 if (mute) 205 snd_soc_write(codec, WM8711_APDIGI, mute_reg | 0x8); 206 else 207 snd_soc_write(codec, WM8711_APDIGI, mute_reg); 208 209 return 0; 210 } 211 212 static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai, 213 int clk_id, unsigned int freq, int dir) 214 { 215 struct snd_soc_codec *codec = codec_dai->codec; 216 struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec); 217 218 switch (freq) { 219 case 11289600: 220 case 12000000: 221 case 12288000: 222 case 16934400: 223 case 18432000: 224 wm8711->sysclk = freq; 225 return 0; 226 } 227 return -EINVAL; 228 } 229 230 static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai, 231 unsigned int fmt) 232 { 233 struct snd_soc_codec *codec = codec_dai->codec; 234 u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0x000c; 235 236 /* set master/slave audio interface */ 237 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 238 case SND_SOC_DAIFMT_CBM_CFM: 239 iface |= 0x0040; 240 break; 241 case SND_SOC_DAIFMT_CBS_CFS: 242 break; 243 default: 244 return -EINVAL; 245 } 246 247 /* interface format */ 248 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 249 case SND_SOC_DAIFMT_I2S: 250 iface |= 0x0002; 251 break; 252 case SND_SOC_DAIFMT_RIGHT_J: 253 break; 254 case SND_SOC_DAIFMT_LEFT_J: 255 iface |= 0x0001; 256 break; 257 case SND_SOC_DAIFMT_DSP_A: 258 iface |= 0x0003; 259 break; 260 case SND_SOC_DAIFMT_DSP_B: 261 iface |= 0x0013; 262 break; 263 default: 264 return -EINVAL; 265 } 266 267 /* clock inversion */ 268 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 269 case SND_SOC_DAIFMT_NB_NF: 270 break; 271 case SND_SOC_DAIFMT_IB_IF: 272 iface |= 0x0090; 273 break; 274 case SND_SOC_DAIFMT_IB_NF: 275 iface |= 0x0080; 276 break; 277 case SND_SOC_DAIFMT_NB_IF: 278 iface |= 0x0010; 279 break; 280 default: 281 return -EINVAL; 282 } 283 284 /* set iface */ 285 snd_soc_write(codec, WM8711_IFACE, iface); 286 return 0; 287 } 288 289 static int wm8711_set_bias_level(struct snd_soc_codec *codec, 290 enum snd_soc_bias_level level) 291 { 292 u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f; 293 294 switch (level) { 295 case SND_SOC_BIAS_ON: 296 snd_soc_write(codec, WM8711_PWR, reg); 297 break; 298 case SND_SOC_BIAS_PREPARE: 299 break; 300 case SND_SOC_BIAS_STANDBY: 301 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) 302 snd_soc_cache_sync(codec); 303 304 snd_soc_write(codec, WM8711_PWR, reg | 0x0040); 305 break; 306 case SND_SOC_BIAS_OFF: 307 snd_soc_write(codec, WM8711_ACTIVE, 0x0); 308 snd_soc_write(codec, WM8711_PWR, 0xffff); 309 break; 310 } 311 codec->dapm.bias_level = level; 312 return 0; 313 } 314 315 #define WM8711_RATES SNDRV_PCM_RATE_8000_96000 316 317 #define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 318 SNDRV_PCM_FMTBIT_S24_LE) 319 320 static const struct snd_soc_dai_ops wm8711_ops = { 321 .prepare = wm8711_pcm_prepare, 322 .hw_params = wm8711_hw_params, 323 .shutdown = wm8711_shutdown, 324 .digital_mute = wm8711_mute, 325 .set_sysclk = wm8711_set_dai_sysclk, 326 .set_fmt = wm8711_set_dai_fmt, 327 }; 328 329 static struct snd_soc_dai_driver wm8711_dai = { 330 .name = "wm8711-hifi", 331 .playback = { 332 .stream_name = "Playback", 333 .channels_min = 1, 334 .channels_max = 2, 335 .rates = WM8711_RATES, 336 .formats = WM8711_FORMATS, 337 }, 338 .ops = &wm8711_ops, 339 }; 340 341 static int wm8711_suspend(struct snd_soc_codec *codec) 342 { 343 snd_soc_write(codec, WM8711_ACTIVE, 0x0); 344 wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF); 345 return 0; 346 } 347 348 static int wm8711_resume(struct snd_soc_codec *codec) 349 { 350 wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 351 return 0; 352 } 353 354 static int wm8711_probe(struct snd_soc_codec *codec) 355 { 356 struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec); 357 int ret; 358 359 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8711->bus_type); 360 if (ret < 0) { 361 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 362 return ret; 363 } 364 365 ret = wm8711_reset(codec); 366 if (ret < 0) { 367 dev_err(codec->dev, "Failed to issue reset\n"); 368 return ret; 369 } 370 371 wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 372 373 /* Latch the update bits */ 374 snd_soc_update_bits(codec, WM8711_LOUT1V, 0x0100, 0x0100); 375 snd_soc_update_bits(codec, WM8711_ROUT1V, 0x0100, 0x0100); 376 377 return ret; 378 379 } 380 381 /* power down chip */ 382 static int wm8711_remove(struct snd_soc_codec *codec) 383 { 384 wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF); 385 return 0; 386 } 387 388 static struct snd_soc_codec_driver soc_codec_dev_wm8711 = { 389 .probe = wm8711_probe, 390 .remove = wm8711_remove, 391 .suspend = wm8711_suspend, 392 .resume = wm8711_resume, 393 .set_bias_level = wm8711_set_bias_level, 394 .reg_cache_size = ARRAY_SIZE(wm8711_reg), 395 .reg_word_size = sizeof(u16), 396 .reg_cache_default = wm8711_reg, 397 .controls = wm8711_snd_controls, 398 .num_controls = ARRAY_SIZE(wm8711_snd_controls), 399 .dapm_widgets = wm8711_dapm_widgets, 400 .num_dapm_widgets = ARRAY_SIZE(wm8711_dapm_widgets), 401 .dapm_routes = wm8711_intercon, 402 .num_dapm_routes = ARRAY_SIZE(wm8711_intercon), 403 }; 404 405 static const struct of_device_id wm8711_of_match[] = { 406 { .compatible = "wlf,wm8711", }, 407 { } 408 }; 409 MODULE_DEVICE_TABLE(of, wm8711_of_match); 410 411 #if defined(CONFIG_SPI_MASTER) 412 static int __devinit wm8711_spi_probe(struct spi_device *spi) 413 { 414 struct wm8711_priv *wm8711; 415 int ret; 416 417 wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL); 418 if (wm8711 == NULL) 419 return -ENOMEM; 420 421 spi_set_drvdata(spi, wm8711); 422 wm8711->bus_type = SND_SOC_SPI; 423 424 ret = snd_soc_register_codec(&spi->dev, 425 &soc_codec_dev_wm8711, &wm8711_dai, 1); 426 if (ret < 0) 427 kfree(wm8711); 428 return ret; 429 } 430 431 static int __devexit wm8711_spi_remove(struct spi_device *spi) 432 { 433 snd_soc_unregister_codec(&spi->dev); 434 kfree(spi_get_drvdata(spi)); 435 return 0; 436 } 437 438 static struct spi_driver wm8711_spi_driver = { 439 .driver = { 440 .name = "wm8711", 441 .owner = THIS_MODULE, 442 .of_match_table = wm8711_of_match, 443 }, 444 .probe = wm8711_spi_probe, 445 .remove = __devexit_p(wm8711_spi_remove), 446 }; 447 #endif /* CONFIG_SPI_MASTER */ 448 449 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 450 static __devinit int wm8711_i2c_probe(struct i2c_client *client, 451 const struct i2c_device_id *id) 452 { 453 struct wm8711_priv *wm8711; 454 int ret; 455 456 wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL); 457 if (wm8711 == NULL) 458 return -ENOMEM; 459 460 i2c_set_clientdata(client, wm8711); 461 wm8711->bus_type = SND_SOC_I2C; 462 463 ret = snd_soc_register_codec(&client->dev, 464 &soc_codec_dev_wm8711, &wm8711_dai, 1); 465 if (ret < 0) 466 kfree(wm8711); 467 return ret; 468 } 469 470 static __devexit int wm8711_i2c_remove(struct i2c_client *client) 471 { 472 snd_soc_unregister_codec(&client->dev); 473 kfree(i2c_get_clientdata(client)); 474 return 0; 475 } 476 477 static const struct i2c_device_id wm8711_i2c_id[] = { 478 { "wm8711", 0 }, 479 { } 480 }; 481 MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id); 482 483 static struct i2c_driver wm8711_i2c_driver = { 484 .driver = { 485 .name = "wm8711", 486 .owner = THIS_MODULE, 487 .of_match_table = wm8711_of_match, 488 }, 489 .probe = wm8711_i2c_probe, 490 .remove = __devexit_p(wm8711_i2c_remove), 491 .id_table = wm8711_i2c_id, 492 }; 493 #endif 494 495 static int __init wm8711_modinit(void) 496 { 497 int ret; 498 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 499 ret = i2c_add_driver(&wm8711_i2c_driver); 500 if (ret != 0) { 501 printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n", 502 ret); 503 } 504 #endif 505 #if defined(CONFIG_SPI_MASTER) 506 ret = spi_register_driver(&wm8711_spi_driver); 507 if (ret != 0) { 508 printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n", 509 ret); 510 } 511 #endif 512 return 0; 513 } 514 module_init(wm8711_modinit); 515 516 static void __exit wm8711_exit(void) 517 { 518 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 519 i2c_del_driver(&wm8711_i2c_driver); 520 #endif 521 #if defined(CONFIG_SPI_MASTER) 522 spi_unregister_driver(&wm8711_spi_driver); 523 #endif 524 } 525 module_exit(wm8711_exit); 526 527 MODULE_DESCRIPTION("ASoC WM8711 driver"); 528 MODULE_AUTHOR("Mike Arthur"); 529 MODULE_LICENSE("GPL"); 530