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/regmap.h> 21 #include <linux/slab.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/initval.h> 27 #include <sound/tlv.h> 28 29 #include "wm8974.h" 30 31 static const struct reg_default wm8974_reg_defaults[] = { 32 { 0, 0x0000 }, { 1, 0x0000 }, { 2, 0x0000 }, { 3, 0x0000 }, 33 { 4, 0x0050 }, { 5, 0x0000 }, { 6, 0x0140 }, { 7, 0x0000 }, 34 { 8, 0x0000 }, { 9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff }, 35 { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff }, 36 { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c }, 37 { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 }, 38 { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 }, 39 { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 }, 40 { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 }, 41 { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 }, 42 { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 }, 43 { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 }, 44 { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 }, 45 { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 }, 46 { 56, 0x0000 }, 47 }; 48 49 #define WM8974_POWER1_BIASEN 0x08 50 #define WM8974_POWER1_BUFIOEN 0x04 51 52 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0) 53 54 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" }; 55 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" }; 56 static const char *wm8974_eqmode[] = {"Capture", "Playback" }; 57 static const char *wm8974_bw[] = {"Narrow", "Wide" }; 58 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" }; 59 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" }; 60 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" }; 61 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" }; 62 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" }; 63 static const char *wm8974_alc[] = {"ALC", "Limiter" }; 64 65 static const struct soc_enum wm8974_enum[] = { 66 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */ 67 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */ 68 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp), 69 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode), 70 71 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1), 72 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw), 73 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2), 74 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw), 75 76 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3), 77 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw), 78 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4), 79 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw), 80 81 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5), 82 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc), 83 }; 84 85 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" }; 86 87 static SOC_ENUM_SINGLE_DECL(wm8974_auxmode, 88 WM8974_INPUT, 3, wm8974_auxmode_text); 89 90 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); 91 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); 92 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); 93 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); 94 95 static const struct snd_kcontrol_new wm8974_snd_controls[] = { 96 97 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0), 98 99 SOC_ENUM("DAC Companding", wm8974_enum[1]), 100 SOC_ENUM("ADC Companding", wm8974_enum[0]), 101 102 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]), 103 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0), 104 105 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv), 106 107 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0), 108 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0), 109 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0), 110 111 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv), 112 113 SOC_ENUM("Equaliser Function", wm8974_enum[3]), 114 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), 115 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv), 116 117 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]), 118 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), 119 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv), 120 121 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]), 122 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), 123 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv), 124 125 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]), 126 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), 127 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv), 128 129 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]), 130 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), 131 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv), 132 133 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0), 134 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0), 135 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0), 136 137 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0), 138 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0), 139 140 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0), 141 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0), 142 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0), 143 144 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0), 145 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0), 146 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0), 147 148 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]), 149 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0), 150 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0), 151 152 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0), 153 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0), 154 155 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0), 156 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv), 157 158 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), 159 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), 160 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv), 161 162 SOC_ENUM("Aux Mode", wm8974_auxmode), 163 164 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), 165 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1), 166 167 /* DAC / ADC oversampling */ 168 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0), 169 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0), 170 }; 171 172 /* Speaker Output Mixer */ 173 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = { 174 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0), 175 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0), 176 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0), 177 }; 178 179 /* Mono Output Mixer */ 180 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = { 181 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0), 182 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0), 183 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0), 184 }; 185 186 /* Boost mixer */ 187 static const struct snd_kcontrol_new wm8974_boost_mixer[] = { 188 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0), 189 }; 190 191 /* Input PGA */ 192 static const struct snd_kcontrol_new wm8974_inpga[] = { 193 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0), 194 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0), 195 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0), 196 }; 197 198 /* AUX Input boost vol */ 199 static const struct snd_kcontrol_new wm8974_aux_boost_controls = 200 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0); 201 202 /* Mic Input boost vol */ 203 static const struct snd_kcontrol_new wm8974_mic_boost_controls = 204 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0); 205 206 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = { 207 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0, 208 &wm8974_speaker_mixer_controls[0], 209 ARRAY_SIZE(wm8974_speaker_mixer_controls)), 210 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0, 211 &wm8974_mono_mixer_controls[0], 212 ARRAY_SIZE(wm8974_mono_mixer_controls)), 213 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0), 214 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0), 215 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0), 216 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0), 217 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0), 218 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0), 219 220 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga, 221 ARRAY_SIZE(wm8974_inpga)), 222 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, 223 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)), 224 225 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0), 226 227 SND_SOC_DAPM_INPUT("MICN"), 228 SND_SOC_DAPM_INPUT("MICP"), 229 SND_SOC_DAPM_INPUT("AUX"), 230 SND_SOC_DAPM_OUTPUT("MONOOUT"), 231 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 232 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 233 }; 234 235 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = { 236 /* Mono output mixer */ 237 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 238 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 239 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 240 241 /* Speaker output mixer */ 242 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 243 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 244 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 245 246 /* Outputs */ 247 {"Mono Out", NULL, "Mono Mixer"}, 248 {"MONOOUT", NULL, "Mono Out"}, 249 {"SpkN Out", NULL, "Speaker Mixer"}, 250 {"SpkP Out", NULL, "Speaker Mixer"}, 251 {"SPKOUTN", NULL, "SpkN Out"}, 252 {"SPKOUTP", NULL, "SpkP Out"}, 253 254 /* Boost Mixer */ 255 {"ADC", NULL, "Boost Mixer"}, 256 {"Boost Mixer", "Aux Switch", "Aux Input"}, 257 {"Boost Mixer", NULL, "Input PGA"}, 258 {"Boost Mixer", NULL, "MICP"}, 259 260 /* Input PGA */ 261 {"Input PGA", "Aux Switch", "Aux Input"}, 262 {"Input PGA", "MicN Switch", "MICN"}, 263 {"Input PGA", "MicP Switch", "MICP"}, 264 265 /* Inputs */ 266 {"Aux Input", NULL, "AUX"}, 267 }; 268 269 struct pll_ { 270 unsigned int pre_div:1; 271 unsigned int n:4; 272 unsigned int k; 273 }; 274 275 /* The size in bits of the pll divide multiplied by 10 276 * to allow rounding later */ 277 #define FIXED_PLL_SIZE ((1 << 24) * 10) 278 279 static void pll_factors(struct pll_ *pll_div, 280 unsigned int target, unsigned int source) 281 { 282 unsigned long long Kpart; 283 unsigned int K, Ndiv, Nmod; 284 285 /* There is a fixed divide by 4 in the output path */ 286 target *= 4; 287 288 Ndiv = target / source; 289 if (Ndiv < 6) { 290 source /= 2; 291 pll_div->pre_div = 1; 292 Ndiv = target / source; 293 } else 294 pll_div->pre_div = 0; 295 296 if ((Ndiv < 6) || (Ndiv > 12)) 297 printk(KERN_WARNING 298 "WM8974 N value %u outwith recommended range!\n", 299 Ndiv); 300 301 pll_div->n = Ndiv; 302 Nmod = target % source; 303 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 304 305 do_div(Kpart, source); 306 307 K = Kpart & 0xFFFFFFFF; 308 309 /* Check if we need to round */ 310 if ((K % 10) >= 5) 311 K += 5; 312 313 /* Move down to proper range now rounding is done */ 314 K /= 10; 315 316 pll_div->k = K; 317 } 318 319 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 320 int source, unsigned int freq_in, unsigned int freq_out) 321 { 322 struct snd_soc_codec *codec = codec_dai->codec; 323 struct pll_ pll_div; 324 u16 reg; 325 326 if (freq_in == 0 || freq_out == 0) { 327 /* Clock CODEC directly from MCLK */ 328 reg = snd_soc_read(codec, WM8974_CLOCK); 329 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff); 330 331 /* Turn off PLL */ 332 reg = snd_soc_read(codec, WM8974_POWER1); 333 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df); 334 return 0; 335 } 336 337 pll_factors(&pll_div, freq_out, freq_in); 338 339 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); 340 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18); 341 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); 342 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff); 343 reg = snd_soc_read(codec, WM8974_POWER1); 344 snd_soc_write(codec, WM8974_POWER1, reg | 0x020); 345 346 /* Run CODEC from PLL instead of MCLK */ 347 reg = snd_soc_read(codec, WM8974_CLOCK); 348 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100); 349 350 return 0; 351 } 352 353 /* 354 * Configure WM8974 clock dividers. 355 */ 356 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 357 int div_id, int div) 358 { 359 struct snd_soc_codec *codec = codec_dai->codec; 360 u16 reg; 361 362 switch (div_id) { 363 case WM8974_OPCLKDIV: 364 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf; 365 snd_soc_write(codec, WM8974_GPIO, reg | div); 366 break; 367 case WM8974_MCLKDIV: 368 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f; 369 snd_soc_write(codec, WM8974_CLOCK, reg | div); 370 break; 371 case WM8974_BCLKDIV: 372 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3; 373 snd_soc_write(codec, WM8974_CLOCK, reg | div); 374 break; 375 default: 376 return -EINVAL; 377 } 378 379 return 0; 380 } 381 382 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, 383 unsigned int fmt) 384 { 385 struct snd_soc_codec *codec = codec_dai->codec; 386 u16 iface = 0; 387 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe; 388 389 /* set master/slave audio interface */ 390 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 391 case SND_SOC_DAIFMT_CBM_CFM: 392 clk |= 0x0001; 393 break; 394 case SND_SOC_DAIFMT_CBS_CFS: 395 break; 396 default: 397 return -EINVAL; 398 } 399 400 /* interface format */ 401 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 402 case SND_SOC_DAIFMT_I2S: 403 iface |= 0x0010; 404 break; 405 case SND_SOC_DAIFMT_RIGHT_J: 406 break; 407 case SND_SOC_DAIFMT_LEFT_J: 408 iface |= 0x0008; 409 break; 410 case SND_SOC_DAIFMT_DSP_A: 411 iface |= 0x00018; 412 break; 413 default: 414 return -EINVAL; 415 } 416 417 /* clock inversion */ 418 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 419 case SND_SOC_DAIFMT_NB_NF: 420 break; 421 case SND_SOC_DAIFMT_IB_IF: 422 iface |= 0x0180; 423 break; 424 case SND_SOC_DAIFMT_IB_NF: 425 iface |= 0x0100; 426 break; 427 case SND_SOC_DAIFMT_NB_IF: 428 iface |= 0x0080; 429 break; 430 default: 431 return -EINVAL; 432 } 433 434 snd_soc_write(codec, WM8974_IFACE, iface); 435 snd_soc_write(codec, WM8974_CLOCK, clk); 436 return 0; 437 } 438 439 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, 440 struct snd_pcm_hw_params *params, 441 struct snd_soc_dai *dai) 442 { 443 struct snd_soc_codec *codec = dai->codec; 444 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f; 445 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1; 446 447 /* bit size */ 448 switch (params_width(params)) { 449 case 16: 450 break; 451 case 20: 452 iface |= 0x0020; 453 break; 454 case 24: 455 iface |= 0x0040; 456 break; 457 case 32: 458 iface |= 0x0060; 459 break; 460 } 461 462 /* filter coefficient */ 463 switch (params_rate(params)) { 464 case 8000: 465 adn |= 0x5 << 1; 466 break; 467 case 11025: 468 adn |= 0x4 << 1; 469 break; 470 case 16000: 471 adn |= 0x3 << 1; 472 break; 473 case 22050: 474 adn |= 0x2 << 1; 475 break; 476 case 32000: 477 adn |= 0x1 << 1; 478 break; 479 case 44100: 480 case 48000: 481 break; 482 } 483 484 snd_soc_write(codec, WM8974_IFACE, iface); 485 snd_soc_write(codec, WM8974_ADD, adn); 486 return 0; 487 } 488 489 static int wm8974_mute(struct snd_soc_dai *dai, int mute) 490 { 491 struct snd_soc_codec *codec = dai->codec; 492 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf; 493 494 if (mute) 495 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40); 496 else 497 snd_soc_write(codec, WM8974_DAC, mute_reg); 498 return 0; 499 } 500 501 /* liam need to make this lower power with dapm */ 502 static int wm8974_set_bias_level(struct snd_soc_codec *codec, 503 enum snd_soc_bias_level level) 504 { 505 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3; 506 507 switch (level) { 508 case SND_SOC_BIAS_ON: 509 case SND_SOC_BIAS_PREPARE: 510 power1 |= 0x1; /* VMID 50k */ 511 snd_soc_write(codec, WM8974_POWER1, power1); 512 break; 513 514 case SND_SOC_BIAS_STANDBY: 515 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; 516 517 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 518 regcache_sync(dev_get_regmap(codec->dev, NULL)); 519 520 /* Initial cap charge at VMID 5k */ 521 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3); 522 mdelay(100); 523 } 524 525 power1 |= 0x2; /* VMID 500k */ 526 snd_soc_write(codec, WM8974_POWER1, power1); 527 break; 528 529 case SND_SOC_BIAS_OFF: 530 snd_soc_write(codec, WM8974_POWER1, 0); 531 snd_soc_write(codec, WM8974_POWER2, 0); 532 snd_soc_write(codec, WM8974_POWER3, 0); 533 break; 534 } 535 536 codec->dapm.bias_level = level; 537 return 0; 538 } 539 540 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000) 541 542 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 543 SNDRV_PCM_FMTBIT_S24_LE) 544 545 static const struct snd_soc_dai_ops wm8974_ops = { 546 .hw_params = wm8974_pcm_hw_params, 547 .digital_mute = wm8974_mute, 548 .set_fmt = wm8974_set_dai_fmt, 549 .set_clkdiv = wm8974_set_dai_clkdiv, 550 .set_pll = wm8974_set_dai_pll, 551 }; 552 553 static struct snd_soc_dai_driver wm8974_dai = { 554 .name = "wm8974-hifi", 555 .playback = { 556 .stream_name = "Playback", 557 .channels_min = 1, 558 .channels_max = 2, /* Only 1 channel of data */ 559 .rates = WM8974_RATES, 560 .formats = WM8974_FORMATS,}, 561 .capture = { 562 .stream_name = "Capture", 563 .channels_min = 1, 564 .channels_max = 2, /* Only 1 channel of data */ 565 .rates = WM8974_RATES, 566 .formats = WM8974_FORMATS,}, 567 .ops = &wm8974_ops, 568 .symmetric_rates = 1, 569 }; 570 571 static int wm8974_suspend(struct snd_soc_codec *codec) 572 { 573 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 574 return 0; 575 } 576 577 static int wm8974_resume(struct snd_soc_codec *codec) 578 { 579 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 580 return 0; 581 } 582 583 static const struct regmap_config wm8974_regmap = { 584 .reg_bits = 7, 585 .val_bits = 9, 586 587 .max_register = WM8974_MONOMIX, 588 .reg_defaults = wm8974_reg_defaults, 589 .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults), 590 }; 591 592 static int wm8974_probe(struct snd_soc_codec *codec) 593 { 594 int ret = 0; 595 596 ret = wm8974_reset(codec); 597 if (ret < 0) { 598 dev_err(codec->dev, "Failed to issue reset\n"); 599 return ret; 600 } 601 602 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 603 604 return ret; 605 } 606 607 /* power down chip */ 608 static int wm8974_remove(struct snd_soc_codec *codec) 609 { 610 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 611 return 0; 612 } 613 614 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = { 615 .probe = wm8974_probe, 616 .remove = wm8974_remove, 617 .suspend = wm8974_suspend, 618 .resume = wm8974_resume, 619 .set_bias_level = wm8974_set_bias_level, 620 621 .controls = wm8974_snd_controls, 622 .num_controls = ARRAY_SIZE(wm8974_snd_controls), 623 .dapm_widgets = wm8974_dapm_widgets, 624 .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets), 625 .dapm_routes = wm8974_dapm_routes, 626 .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes), 627 }; 628 629 static int wm8974_i2c_probe(struct i2c_client *i2c, 630 const struct i2c_device_id *id) 631 { 632 struct regmap *regmap; 633 int ret; 634 635 regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap); 636 if (IS_ERR(regmap)) 637 return PTR_ERR(regmap); 638 639 ret = snd_soc_register_codec(&i2c->dev, 640 &soc_codec_dev_wm8974, &wm8974_dai, 1); 641 642 return ret; 643 } 644 645 static int wm8974_i2c_remove(struct i2c_client *client) 646 { 647 snd_soc_unregister_codec(&client->dev); 648 649 return 0; 650 } 651 652 static const struct i2c_device_id wm8974_i2c_id[] = { 653 { "wm8974", 0 }, 654 { } 655 }; 656 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); 657 658 static struct i2c_driver wm8974_i2c_driver = { 659 .driver = { 660 .name = "wm8974", 661 .owner = THIS_MODULE, 662 }, 663 .probe = wm8974_i2c_probe, 664 .remove = wm8974_i2c_remove, 665 .id_table = wm8974_i2c_id, 666 }; 667 668 module_i2c_driver(wm8974_i2c_driver); 669 670 MODULE_DESCRIPTION("ASoC WM8974 driver"); 671 MODULE_AUTHOR("Liam Girdwood"); 672 MODULE_LICENSE("GPL"); 673