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/platform_device.h> 22 #include <linux/spi/spi.h> 23 #include <linux/slab.h> 24 #include <linux/of_device.h> 25 #include <sound/core.h> 26 #include <sound/pcm.h> 27 #include <sound/pcm_params.h> 28 #include <sound/soc.h> 29 #include <sound/tlv.h> 30 #include <sound/initval.h> 31 32 #include "wm8711.h" 33 34 /* codec private data */ 35 struct wm8711_priv { 36 enum snd_soc_control_type bus_type; 37 unsigned int sysclk; 38 }; 39 40 /* 41 * wm8711 register cache 42 * We can't read the WM8711 register space when we are 43 * using 2 wire for device control, so we cache them instead. 44 * There is no point in caching the reset register 45 */ 46 static const u16 wm8711_reg[WM8711_CACHEREGNUM] = { 47 0x0079, 0x0079, 0x000a, 0x0008, 48 0x009f, 0x000a, 0x0000, 0x0000 49 }; 50 51 #define wm8711_reset(c) snd_soc_write(c, WM8711_RESET, 0) 52 53 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 54 55 static const struct snd_kcontrol_new wm8711_snd_controls[] = { 56 57 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V, 58 0, 127, 0, out_tlv), 59 SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V, 60 7, 1, 0), 61 62 }; 63 64 /* Output Mixer */ 65 static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = { 66 SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0), 67 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0), 68 }; 69 70 static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = { 71 SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1, 72 &wm8711_output_mixer_controls[0], 73 ARRAY_SIZE(wm8711_output_mixer_controls)), 74 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1), 75 SND_SOC_DAPM_OUTPUT("LOUT"), 76 SND_SOC_DAPM_OUTPUT("LHPOUT"), 77 SND_SOC_DAPM_OUTPUT("ROUT"), 78 SND_SOC_DAPM_OUTPUT("RHPOUT"), 79 }; 80 81 static const struct snd_soc_dapm_route wm8711_intercon[] = { 82 /* output mixer */ 83 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 84 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 85 86 /* outputs */ 87 {"RHPOUT", NULL, "Output Mixer"}, 88 {"ROUT", NULL, "Output Mixer"}, 89 {"LHPOUT", NULL, "Output Mixer"}, 90 {"LOUT", NULL, "Output Mixer"}, 91 }; 92 93 struct _coeff_div { 94 u32 mclk; 95 u32 rate; 96 u16 fs; 97 u8 sr:4; 98 u8 bosr:1; 99 u8 usb:1; 100 }; 101 102 /* codec mclk clock divider coefficients */ 103 static const struct _coeff_div coeff_div[] = { 104 /* 48k */ 105 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 106 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 107 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 108 109 /* 32k */ 110 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 111 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 112 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 113 114 /* 8k */ 115 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 116 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 117 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 118 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 119 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 120 121 /* 96k */ 122 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 123 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 124 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 125 126 /* 44.1k */ 127 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 128 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 129 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 130 131 /* 88.2k */ 132 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 133 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 134 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 135 }; 136 137 static inline int get_coeff(int mclk, int rate) 138 { 139 int i; 140 141 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 142 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 143 return i; 144 } 145 return 0; 146 } 147 148 static int wm8711_hw_params(struct snd_pcm_substream *substream, 149 struct snd_pcm_hw_params *params, 150 struct snd_soc_dai *dai) 151 { 152 struct snd_soc_codec *codec = dai->codec; 153 struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec); 154 u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfff3; 155 int i = get_coeff(wm8711->sysclk, params_rate(params)); 156 u16 srate = (coeff_div[i].sr << 2) | 157 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 158 159 snd_soc_write(codec, WM8711_SRATE, srate); 160 161 /* bit size */ 162 switch (params_format(params)) { 163 case SNDRV_PCM_FORMAT_S16_LE: 164 break; 165 case SNDRV_PCM_FORMAT_S20_3LE: 166 iface |= 0x0004; 167 break; 168 case SNDRV_PCM_FORMAT_S24_LE: 169 iface |= 0x0008; 170 break; 171 } 172 173 snd_soc_write(codec, WM8711_IFACE, iface); 174 return 0; 175 } 176 177 static int wm8711_pcm_prepare(struct snd_pcm_substream *substream, 178 struct snd_soc_dai *dai) 179 { 180 struct snd_soc_codec *codec = dai->codec; 181 182 /* set active */ 183 snd_soc_write(codec, WM8711_ACTIVE, 0x0001); 184 185 return 0; 186 } 187 188 static void wm8711_shutdown(struct snd_pcm_substream *substream, 189 struct snd_soc_dai *dai) 190 { 191 struct snd_soc_codec *codec = dai->codec; 192 193 /* deactivate */ 194 if (!codec->active) { 195 udelay(50); 196 snd_soc_write(codec, WM8711_ACTIVE, 0x0); 197 } 198 } 199 200 static int wm8711_mute(struct snd_soc_dai *dai, int mute) 201 { 202 struct snd_soc_codec *codec = dai->codec; 203 u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7; 204 205 if (mute) 206 snd_soc_write(codec, WM8711_APDIGI, mute_reg | 0x8); 207 else 208 snd_soc_write(codec, WM8711_APDIGI, mute_reg); 209 210 return 0; 211 } 212 213 static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai, 214 int clk_id, unsigned int freq, int dir) 215 { 216 struct snd_soc_codec *codec = codec_dai->codec; 217 struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec); 218 219 switch (freq) { 220 case 11289600: 221 case 12000000: 222 case 12288000: 223 case 16934400: 224 case 18432000: 225 wm8711->sysclk = freq; 226 return 0; 227 } 228 return -EINVAL; 229 } 230 231 static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai, 232 unsigned int fmt) 233 { 234 struct snd_soc_codec *codec = codec_dai->codec; 235 u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0x000c; 236 237 /* set master/slave audio interface */ 238 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 239 case SND_SOC_DAIFMT_CBM_CFM: 240 iface |= 0x0040; 241 break; 242 case SND_SOC_DAIFMT_CBS_CFS: 243 break; 244 default: 245 return -EINVAL; 246 } 247 248 /* interface format */ 249 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 250 case SND_SOC_DAIFMT_I2S: 251 iface |= 0x0002; 252 break; 253 case SND_SOC_DAIFMT_RIGHT_J: 254 break; 255 case SND_SOC_DAIFMT_LEFT_J: 256 iface |= 0x0001; 257 break; 258 case SND_SOC_DAIFMT_DSP_A: 259 iface |= 0x0003; 260 break; 261 case SND_SOC_DAIFMT_DSP_B: 262 iface |= 0x0013; 263 break; 264 default: 265 return -EINVAL; 266 } 267 268 /* clock inversion */ 269 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 270 case SND_SOC_DAIFMT_NB_NF: 271 break; 272 case SND_SOC_DAIFMT_IB_IF: 273 iface |= 0x0090; 274 break; 275 case SND_SOC_DAIFMT_IB_NF: 276 iface |= 0x0080; 277 break; 278 case SND_SOC_DAIFMT_NB_IF: 279 iface |= 0x0010; 280 break; 281 default: 282 return -EINVAL; 283 } 284 285 /* set iface */ 286 snd_soc_write(codec, WM8711_IFACE, iface); 287 return 0; 288 } 289 290 static int wm8711_set_bias_level(struct snd_soc_codec *codec, 291 enum snd_soc_bias_level level) 292 { 293 u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f; 294 295 switch (level) { 296 case SND_SOC_BIAS_ON: 297 snd_soc_write(codec, WM8711_PWR, reg); 298 break; 299 case SND_SOC_BIAS_PREPARE: 300 break; 301 case SND_SOC_BIAS_STANDBY: 302 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) 303 snd_soc_cache_sync(codec); 304 305 snd_soc_write(codec, WM8711_PWR, reg | 0x0040); 306 break; 307 case SND_SOC_BIAS_OFF: 308 snd_soc_write(codec, WM8711_ACTIVE, 0x0); 309 snd_soc_write(codec, WM8711_PWR, 0xffff); 310 break; 311 } 312 codec->dapm.bias_level = level; 313 return 0; 314 } 315 316 #define WM8711_RATES SNDRV_PCM_RATE_8000_96000 317 318 #define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 319 SNDRV_PCM_FMTBIT_S24_LE) 320 321 static struct snd_soc_dai_ops wm8711_ops = { 322 .prepare = wm8711_pcm_prepare, 323 .hw_params = wm8711_hw_params, 324 .shutdown = wm8711_shutdown, 325 .digital_mute = wm8711_mute, 326 .set_sysclk = wm8711_set_dai_sysclk, 327 .set_fmt = wm8711_set_dai_fmt, 328 }; 329 330 static struct snd_soc_dai_driver wm8711_dai = { 331 .name = "wm8711-hifi", 332 .playback = { 333 .stream_name = "Playback", 334 .channels_min = 1, 335 .channels_max = 2, 336 .rates = WM8711_RATES, 337 .formats = WM8711_FORMATS, 338 }, 339 .ops = &wm8711_ops, 340 }; 341 342 static int wm8711_suspend(struct snd_soc_codec *codec, pm_message_t state) 343 { 344 snd_soc_write(codec, WM8711_ACTIVE, 0x0); 345 wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF); 346 return 0; 347 } 348 349 static int wm8711_resume(struct snd_soc_codec *codec) 350 { 351 wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 352 return 0; 353 } 354 355 static int wm8711_probe(struct snd_soc_codec *codec) 356 { 357 struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec); 358 int ret; 359 360 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8711->bus_type); 361 if (ret < 0) { 362 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 363 return ret; 364 } 365 366 ret = wm8711_reset(codec); 367 if (ret < 0) { 368 dev_err(codec->dev, "Failed to issue reset\n"); 369 return ret; 370 } 371 372 wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 373 374 /* Latch the update bits */ 375 snd_soc_update_bits(codec, WM8711_LOUT1V, 0x0100, 0x0100); 376 snd_soc_update_bits(codec, WM8711_ROUT1V, 0x0100, 0x0100); 377 378 snd_soc_add_controls(codec, wm8711_snd_controls, 379 ARRAY_SIZE(wm8711_snd_controls)); 380 381 return ret; 382 383 } 384 385 /* power down chip */ 386 static int wm8711_remove(struct snd_soc_codec *codec) 387 { 388 wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF); 389 return 0; 390 } 391 392 static struct snd_soc_codec_driver soc_codec_dev_wm8711 = { 393 .probe = wm8711_probe, 394 .remove = wm8711_remove, 395 .suspend = wm8711_suspend, 396 .resume = wm8711_resume, 397 .set_bias_level = wm8711_set_bias_level, 398 .reg_cache_size = ARRAY_SIZE(wm8711_reg), 399 .reg_word_size = sizeof(u16), 400 .reg_cache_default = wm8711_reg, 401 .dapm_widgets = wm8711_dapm_widgets, 402 .num_dapm_widgets = ARRAY_SIZE(wm8711_dapm_widgets), 403 .dapm_routes = wm8711_intercon, 404 .num_dapm_routes = ARRAY_SIZE(wm8711_intercon), 405 }; 406 407 static const struct of_device_id wm8711_of_match[] = { 408 { .compatible = "wlf,wm8711", }, 409 { } 410 }; 411 MODULE_DEVICE_TABLE(of, wm8711_of_match); 412 413 #if defined(CONFIG_SPI_MASTER) 414 static int __devinit wm8711_spi_probe(struct spi_device *spi) 415 { 416 struct wm8711_priv *wm8711; 417 int ret; 418 419 wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL); 420 if (wm8711 == NULL) 421 return -ENOMEM; 422 423 spi_set_drvdata(spi, wm8711); 424 wm8711->bus_type = SND_SOC_SPI; 425 426 ret = snd_soc_register_codec(&spi->dev, 427 &soc_codec_dev_wm8711, &wm8711_dai, 1); 428 if (ret < 0) 429 kfree(wm8711); 430 return ret; 431 } 432 433 static int __devexit wm8711_spi_remove(struct spi_device *spi) 434 { 435 snd_soc_unregister_codec(&spi->dev); 436 kfree(spi_get_drvdata(spi)); 437 return 0; 438 } 439 440 static struct spi_driver wm8711_spi_driver = { 441 .driver = { 442 .name = "wm8711", 443 .owner = THIS_MODULE, 444 .of_match_table = wm8711_of_match, 445 }, 446 .probe = wm8711_spi_probe, 447 .remove = __devexit_p(wm8711_spi_remove), 448 }; 449 #endif /* CONFIG_SPI_MASTER */ 450 451 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 452 static __devinit int wm8711_i2c_probe(struct i2c_client *client, 453 const struct i2c_device_id *id) 454 { 455 struct wm8711_priv *wm8711; 456 int ret; 457 458 wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL); 459 if (wm8711 == NULL) 460 return -ENOMEM; 461 462 i2c_set_clientdata(client, wm8711); 463 wm8711->bus_type = SND_SOC_I2C; 464 465 ret = snd_soc_register_codec(&client->dev, 466 &soc_codec_dev_wm8711, &wm8711_dai, 1); 467 if (ret < 0) 468 kfree(wm8711); 469 return ret; 470 } 471 472 static __devexit int wm8711_i2c_remove(struct i2c_client *client) 473 { 474 snd_soc_unregister_codec(&client->dev); 475 kfree(i2c_get_clientdata(client)); 476 return 0; 477 } 478 479 static const struct i2c_device_id wm8711_i2c_id[] = { 480 { "wm8711", 0 }, 481 { } 482 }; 483 MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id); 484 485 static struct i2c_driver wm8711_i2c_driver = { 486 .driver = { 487 .name = "wm8711", 488 .owner = THIS_MODULE, 489 .of_match_table = wm8711_of_match, 490 }, 491 .probe = wm8711_i2c_probe, 492 .remove = __devexit_p(wm8711_i2c_remove), 493 .id_table = wm8711_i2c_id, 494 }; 495 #endif 496 497 static int __init wm8711_modinit(void) 498 { 499 int ret; 500 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 501 ret = i2c_add_driver(&wm8711_i2c_driver); 502 if (ret != 0) { 503 printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n", 504 ret); 505 } 506 #endif 507 #if defined(CONFIG_SPI_MASTER) 508 ret = spi_register_driver(&wm8711_spi_driver); 509 if (ret != 0) { 510 printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n", 511 ret); 512 } 513 #endif 514 return 0; 515 } 516 module_init(wm8711_modinit); 517 518 static void __exit wm8711_exit(void) 519 { 520 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 521 i2c_del_driver(&wm8711_i2c_driver); 522 #endif 523 #if defined(CONFIG_SPI_MASTER) 524 spi_unregister_driver(&wm8711_spi_driver); 525 #endif 526 } 527 module_exit(wm8711_exit); 528 529 MODULE_DESCRIPTION("ASoC WM8711 driver"); 530 MODULE_AUTHOR("Mike Arthur"); 531 MODULE_LICENSE("GPL"); 532