1 /* 2 * wm8974.c -- WM8974 ALSA Soc Audio driver 3 * 4 * Copyright 2006-2009 Wolfson Microelectronics PLC. 5 * 6 * Author: Liam Girdwood <Liam.Girdwood@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 13 #include <linux/module.h> 14 #include <linux/moduleparam.h> 15 #include <linux/kernel.h> 16 #include <linux/init.h> 17 #include <linux/delay.h> 18 #include <linux/pm.h> 19 #include <linux/i2c.h> 20 #include <linux/slab.h> 21 #include <sound/core.h> 22 #include <sound/pcm.h> 23 #include <sound/pcm_params.h> 24 #include <sound/soc.h> 25 #include <sound/initval.h> 26 #include <sound/tlv.h> 27 28 #include "wm8974.h" 29 30 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = { 31 0x0000, 0x0000, 0x0000, 0x0000, 32 0x0050, 0x0000, 0x0140, 0x0000, 33 0x0000, 0x0000, 0x0000, 0x00ff, 34 0x0000, 0x0000, 0x0100, 0x00ff, 35 0x0000, 0x0000, 0x012c, 0x002c, 36 0x002c, 0x002c, 0x002c, 0x0000, 37 0x0032, 0x0000, 0x0000, 0x0000, 38 0x0000, 0x0000, 0x0000, 0x0000, 39 0x0038, 0x000b, 0x0032, 0x0000, 40 0x0008, 0x000c, 0x0093, 0x00e9, 41 0x0000, 0x0000, 0x0000, 0x0000, 42 0x0003, 0x0010, 0x0000, 0x0000, 43 0x0000, 0x0002, 0x0000, 0x0000, 44 0x0000, 0x0000, 0x0039, 0x0000, 45 0x0000, 46 }; 47 48 #define WM8974_POWER1_BIASEN 0x08 49 #define WM8974_POWER1_BUFIOEN 0x04 50 51 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0) 52 53 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" }; 54 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" }; 55 static const char *wm8974_eqmode[] = {"Capture", "Playback" }; 56 static const char *wm8974_bw[] = {"Narrow", "Wide" }; 57 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" }; 58 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" }; 59 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" }; 60 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" }; 61 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" }; 62 static const char *wm8974_alc[] = {"ALC", "Limiter" }; 63 64 static const struct soc_enum wm8974_enum[] = { 65 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */ 66 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */ 67 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp), 68 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode), 69 70 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1), 71 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw), 72 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2), 73 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw), 74 75 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3), 76 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw), 77 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4), 78 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw), 79 80 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5), 81 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc), 82 }; 83 84 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" }; 85 86 static const struct soc_enum wm8974_auxmode = 87 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text); 88 89 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); 90 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); 91 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); 92 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); 93 94 static const struct snd_kcontrol_new wm8974_snd_controls[] = { 95 96 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0), 97 98 SOC_ENUM("DAC Companding", wm8974_enum[1]), 99 SOC_ENUM("ADC Companding", wm8974_enum[0]), 100 101 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]), 102 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0), 103 104 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv), 105 106 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0), 107 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0), 108 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0), 109 110 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv), 111 112 SOC_ENUM("Equaliser Function", wm8974_enum[3]), 113 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), 114 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv), 115 116 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]), 117 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), 118 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv), 119 120 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]), 121 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), 122 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv), 123 124 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]), 125 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), 126 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv), 127 128 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]), 129 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), 130 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv), 131 132 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0), 133 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0), 134 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0), 135 136 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0), 137 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0), 138 139 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0), 140 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0), 141 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0), 142 143 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0), 144 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0), 145 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0), 146 147 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]), 148 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0), 149 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0), 150 151 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0), 152 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0), 153 154 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0), 155 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv), 156 157 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), 158 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), 159 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv), 160 161 SOC_ENUM("Aux Mode", wm8974_auxmode), 162 163 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), 164 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1), 165 166 /* DAC / ADC oversampling */ 167 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0), 168 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0), 169 }; 170 171 /* Speaker Output Mixer */ 172 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = { 173 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0), 174 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0), 175 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0), 176 }; 177 178 /* Mono Output Mixer */ 179 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = { 180 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0), 181 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0), 182 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0), 183 }; 184 185 /* Boost mixer */ 186 static const struct snd_kcontrol_new wm8974_boost_mixer[] = { 187 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0), 188 }; 189 190 /* Input PGA */ 191 static const struct snd_kcontrol_new wm8974_inpga[] = { 192 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0), 193 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0), 194 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0), 195 }; 196 197 /* AUX Input boost vol */ 198 static const struct snd_kcontrol_new wm8974_aux_boost_controls = 199 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0); 200 201 /* Mic Input boost vol */ 202 static const struct snd_kcontrol_new wm8974_mic_boost_controls = 203 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0); 204 205 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = { 206 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0, 207 &wm8974_speaker_mixer_controls[0], 208 ARRAY_SIZE(wm8974_speaker_mixer_controls)), 209 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0, 210 &wm8974_mono_mixer_controls[0], 211 ARRAY_SIZE(wm8974_mono_mixer_controls)), 212 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0), 213 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0), 214 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0), 215 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0), 216 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0), 217 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0), 218 219 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga, 220 ARRAY_SIZE(wm8974_inpga)), 221 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, 222 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)), 223 224 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0), 225 226 SND_SOC_DAPM_INPUT("MICN"), 227 SND_SOC_DAPM_INPUT("MICP"), 228 SND_SOC_DAPM_INPUT("AUX"), 229 SND_SOC_DAPM_OUTPUT("MONOOUT"), 230 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 231 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 232 }; 233 234 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = { 235 /* Mono output mixer */ 236 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 237 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 238 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 239 240 /* Speaker output mixer */ 241 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 242 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 243 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 244 245 /* Outputs */ 246 {"Mono Out", NULL, "Mono Mixer"}, 247 {"MONOOUT", NULL, "Mono Out"}, 248 {"SpkN Out", NULL, "Speaker Mixer"}, 249 {"SpkP Out", NULL, "Speaker Mixer"}, 250 {"SPKOUTN", NULL, "SpkN Out"}, 251 {"SPKOUTP", NULL, "SpkP Out"}, 252 253 /* Boost Mixer */ 254 {"ADC", NULL, "Boost Mixer"}, 255 {"Boost Mixer", "Aux Switch", "Aux Input"}, 256 {"Boost Mixer", NULL, "Input PGA"}, 257 {"Boost Mixer", NULL, "MICP"}, 258 259 /* Input PGA */ 260 {"Input PGA", "Aux Switch", "Aux Input"}, 261 {"Input PGA", "MicN Switch", "MICN"}, 262 {"Input PGA", "MicP Switch", "MICP"}, 263 264 /* Inputs */ 265 {"Aux Input", NULL, "AUX"}, 266 }; 267 268 struct pll_ { 269 unsigned int pre_div:1; 270 unsigned int n:4; 271 unsigned int k; 272 }; 273 274 /* The size in bits of the pll divide multiplied by 10 275 * to allow rounding later */ 276 #define FIXED_PLL_SIZE ((1 << 24) * 10) 277 278 static void pll_factors(struct pll_ *pll_div, 279 unsigned int target, unsigned int source) 280 { 281 unsigned long long Kpart; 282 unsigned int K, Ndiv, Nmod; 283 284 /* There is a fixed divide by 4 in the output path */ 285 target *= 4; 286 287 Ndiv = target / source; 288 if (Ndiv < 6) { 289 source /= 2; 290 pll_div->pre_div = 1; 291 Ndiv = target / source; 292 } else 293 pll_div->pre_div = 0; 294 295 if ((Ndiv < 6) || (Ndiv > 12)) 296 printk(KERN_WARNING 297 "WM8974 N value %u outwith recommended range!\n", 298 Ndiv); 299 300 pll_div->n = Ndiv; 301 Nmod = target % source; 302 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 303 304 do_div(Kpart, source); 305 306 K = Kpart & 0xFFFFFFFF; 307 308 /* Check if we need to round */ 309 if ((K % 10) >= 5) 310 K += 5; 311 312 /* Move down to proper range now rounding is done */ 313 K /= 10; 314 315 pll_div->k = K; 316 } 317 318 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 319 int source, unsigned int freq_in, unsigned int freq_out) 320 { 321 struct snd_soc_codec *codec = codec_dai->codec; 322 struct pll_ pll_div; 323 u16 reg; 324 325 if (freq_in == 0 || freq_out == 0) { 326 /* Clock CODEC directly from MCLK */ 327 reg = snd_soc_read(codec, WM8974_CLOCK); 328 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff); 329 330 /* Turn off PLL */ 331 reg = snd_soc_read(codec, WM8974_POWER1); 332 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df); 333 return 0; 334 } 335 336 pll_factors(&pll_div, freq_out, freq_in); 337 338 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); 339 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18); 340 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); 341 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff); 342 reg = snd_soc_read(codec, WM8974_POWER1); 343 snd_soc_write(codec, WM8974_POWER1, reg | 0x020); 344 345 /* Run CODEC from PLL instead of MCLK */ 346 reg = snd_soc_read(codec, WM8974_CLOCK); 347 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100); 348 349 return 0; 350 } 351 352 /* 353 * Configure WM8974 clock dividers. 354 */ 355 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 356 int div_id, int div) 357 { 358 struct snd_soc_codec *codec = codec_dai->codec; 359 u16 reg; 360 361 switch (div_id) { 362 case WM8974_OPCLKDIV: 363 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf; 364 snd_soc_write(codec, WM8974_GPIO, reg | div); 365 break; 366 case WM8974_MCLKDIV: 367 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f; 368 snd_soc_write(codec, WM8974_CLOCK, reg | div); 369 break; 370 case WM8974_BCLKDIV: 371 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3; 372 snd_soc_write(codec, WM8974_CLOCK, reg | div); 373 break; 374 default: 375 return -EINVAL; 376 } 377 378 return 0; 379 } 380 381 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, 382 unsigned int fmt) 383 { 384 struct snd_soc_codec *codec = codec_dai->codec; 385 u16 iface = 0; 386 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe; 387 388 /* set master/slave audio interface */ 389 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 390 case SND_SOC_DAIFMT_CBM_CFM: 391 clk |= 0x0001; 392 break; 393 case SND_SOC_DAIFMT_CBS_CFS: 394 break; 395 default: 396 return -EINVAL; 397 } 398 399 /* interface format */ 400 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 401 case SND_SOC_DAIFMT_I2S: 402 iface |= 0x0010; 403 break; 404 case SND_SOC_DAIFMT_RIGHT_J: 405 break; 406 case SND_SOC_DAIFMT_LEFT_J: 407 iface |= 0x0008; 408 break; 409 case SND_SOC_DAIFMT_DSP_A: 410 iface |= 0x00018; 411 break; 412 default: 413 return -EINVAL; 414 } 415 416 /* clock inversion */ 417 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 418 case SND_SOC_DAIFMT_NB_NF: 419 break; 420 case SND_SOC_DAIFMT_IB_IF: 421 iface |= 0x0180; 422 break; 423 case SND_SOC_DAIFMT_IB_NF: 424 iface |= 0x0100; 425 break; 426 case SND_SOC_DAIFMT_NB_IF: 427 iface |= 0x0080; 428 break; 429 default: 430 return -EINVAL; 431 } 432 433 snd_soc_write(codec, WM8974_IFACE, iface); 434 snd_soc_write(codec, WM8974_CLOCK, clk); 435 return 0; 436 } 437 438 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, 439 struct snd_pcm_hw_params *params, 440 struct snd_soc_dai *dai) 441 { 442 struct snd_soc_codec *codec = dai->codec; 443 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f; 444 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1; 445 446 /* bit size */ 447 switch (params_format(params)) { 448 case SNDRV_PCM_FORMAT_S16_LE: 449 break; 450 case SNDRV_PCM_FORMAT_S20_3LE: 451 iface |= 0x0020; 452 break; 453 case SNDRV_PCM_FORMAT_S24_LE: 454 iface |= 0x0040; 455 break; 456 case SNDRV_PCM_FORMAT_S32_LE: 457 iface |= 0x0060; 458 break; 459 } 460 461 /* filter coefficient */ 462 switch (params_rate(params)) { 463 case 8000: 464 adn |= 0x5 << 1; 465 break; 466 case 11025: 467 adn |= 0x4 << 1; 468 break; 469 case 16000: 470 adn |= 0x3 << 1; 471 break; 472 case 22050: 473 adn |= 0x2 << 1; 474 break; 475 case 32000: 476 adn |= 0x1 << 1; 477 break; 478 case 44100: 479 case 48000: 480 break; 481 } 482 483 snd_soc_write(codec, WM8974_IFACE, iface); 484 snd_soc_write(codec, WM8974_ADD, adn); 485 return 0; 486 } 487 488 static int wm8974_mute(struct snd_soc_dai *dai, int mute) 489 { 490 struct snd_soc_codec *codec = dai->codec; 491 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf; 492 493 if (mute) 494 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40); 495 else 496 snd_soc_write(codec, WM8974_DAC, mute_reg); 497 return 0; 498 } 499 500 /* liam need to make this lower power with dapm */ 501 static int wm8974_set_bias_level(struct snd_soc_codec *codec, 502 enum snd_soc_bias_level level) 503 { 504 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3; 505 506 switch (level) { 507 case SND_SOC_BIAS_ON: 508 case SND_SOC_BIAS_PREPARE: 509 power1 |= 0x1; /* VMID 50k */ 510 snd_soc_write(codec, WM8974_POWER1, power1); 511 break; 512 513 case SND_SOC_BIAS_STANDBY: 514 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; 515 516 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 517 snd_soc_cache_sync(codec); 518 519 /* Initial cap charge at VMID 5k */ 520 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3); 521 mdelay(100); 522 } 523 524 power1 |= 0x2; /* VMID 500k */ 525 snd_soc_write(codec, WM8974_POWER1, power1); 526 break; 527 528 case SND_SOC_BIAS_OFF: 529 snd_soc_write(codec, WM8974_POWER1, 0); 530 snd_soc_write(codec, WM8974_POWER2, 0); 531 snd_soc_write(codec, WM8974_POWER3, 0); 532 break; 533 } 534 535 codec->dapm.bias_level = level; 536 return 0; 537 } 538 539 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000) 540 541 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 542 SNDRV_PCM_FMTBIT_S24_LE) 543 544 static const struct snd_soc_dai_ops wm8974_ops = { 545 .hw_params = wm8974_pcm_hw_params, 546 .digital_mute = wm8974_mute, 547 .set_fmt = wm8974_set_dai_fmt, 548 .set_clkdiv = wm8974_set_dai_clkdiv, 549 .set_pll = wm8974_set_dai_pll, 550 }; 551 552 static struct snd_soc_dai_driver wm8974_dai = { 553 .name = "wm8974-hifi", 554 .playback = { 555 .stream_name = "Playback", 556 .channels_min = 1, 557 .channels_max = 2, /* Only 1 channel of data */ 558 .rates = WM8974_RATES, 559 .formats = WM8974_FORMATS,}, 560 .capture = { 561 .stream_name = "Capture", 562 .channels_min = 1, 563 .channels_max = 2, /* Only 1 channel of data */ 564 .rates = WM8974_RATES, 565 .formats = WM8974_FORMATS,}, 566 .ops = &wm8974_ops, 567 .symmetric_rates = 1, 568 }; 569 570 static int wm8974_suspend(struct snd_soc_codec *codec) 571 { 572 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 573 return 0; 574 } 575 576 static int wm8974_resume(struct snd_soc_codec *codec) 577 { 578 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 579 return 0; 580 } 581 582 static int wm8974_probe(struct snd_soc_codec *codec) 583 { 584 int ret = 0; 585 586 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C); 587 if (ret < 0) { 588 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 589 return ret; 590 } 591 592 ret = wm8974_reset(codec); 593 if (ret < 0) { 594 dev_err(codec->dev, "Failed to issue reset\n"); 595 return ret; 596 } 597 598 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 599 600 return ret; 601 } 602 603 /* power down chip */ 604 static int wm8974_remove(struct snd_soc_codec *codec) 605 { 606 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 607 return 0; 608 } 609 610 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = { 611 .probe = wm8974_probe, 612 .remove = wm8974_remove, 613 .suspend = wm8974_suspend, 614 .resume = wm8974_resume, 615 .set_bias_level = wm8974_set_bias_level, 616 .reg_cache_size = ARRAY_SIZE(wm8974_reg), 617 .reg_word_size = sizeof(u16), 618 .reg_cache_default = wm8974_reg, 619 620 .controls = wm8974_snd_controls, 621 .num_controls = ARRAY_SIZE(wm8974_snd_controls), 622 .dapm_widgets = wm8974_dapm_widgets, 623 .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets), 624 .dapm_routes = wm8974_dapm_routes, 625 .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes), 626 }; 627 628 static int wm8974_i2c_probe(struct i2c_client *i2c, 629 const struct i2c_device_id *id) 630 { 631 int ret; 632 633 ret = snd_soc_register_codec(&i2c->dev, 634 &soc_codec_dev_wm8974, &wm8974_dai, 1); 635 636 return ret; 637 } 638 639 static int wm8974_i2c_remove(struct i2c_client *client) 640 { 641 snd_soc_unregister_codec(&client->dev); 642 643 return 0; 644 } 645 646 static const struct i2c_device_id wm8974_i2c_id[] = { 647 { "wm8974", 0 }, 648 { } 649 }; 650 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); 651 652 static struct i2c_driver wm8974_i2c_driver = { 653 .driver = { 654 .name = "wm8974", 655 .owner = THIS_MODULE, 656 }, 657 .probe = wm8974_i2c_probe, 658 .remove = wm8974_i2c_remove, 659 .id_table = wm8974_i2c_id, 660 }; 661 662 module_i2c_driver(wm8974_i2c_driver); 663 664 MODULE_DESCRIPTION("ASoC WM8974 driver"); 665 MODULE_AUTHOR("Liam Girdwood"); 666 MODULE_LICENSE("GPL"); 667