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 struct wm8974_priv { 52 enum snd_soc_control_type control_type; 53 }; 54 55 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0) 56 57 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" }; 58 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" }; 59 static const char *wm8974_eqmode[] = {"Capture", "Playback" }; 60 static const char *wm8974_bw[] = {"Narrow", "Wide" }; 61 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" }; 62 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" }; 63 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" }; 64 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" }; 65 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" }; 66 static const char *wm8974_alc[] = {"ALC", "Limiter" }; 67 68 static const struct soc_enum wm8974_enum[] = { 69 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */ 70 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */ 71 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp), 72 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode), 73 74 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1), 75 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw), 76 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2), 77 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw), 78 79 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3), 80 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw), 81 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4), 82 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw), 83 84 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5), 85 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc), 86 }; 87 88 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" }; 89 90 static const struct soc_enum wm8974_auxmode = 91 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text); 92 93 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); 94 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); 95 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); 96 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); 97 98 static const struct snd_kcontrol_new wm8974_snd_controls[] = { 99 100 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0), 101 102 SOC_ENUM("DAC Companding", wm8974_enum[1]), 103 SOC_ENUM("ADC Companding", wm8974_enum[0]), 104 105 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]), 106 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0), 107 108 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv), 109 110 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0), 111 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0), 112 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0), 113 114 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv), 115 116 SOC_ENUM("Equaliser Function", wm8974_enum[3]), 117 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), 118 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv), 119 120 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]), 121 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), 122 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv), 123 124 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]), 125 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), 126 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv), 127 128 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]), 129 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), 130 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv), 131 132 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]), 133 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), 134 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv), 135 136 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0), 137 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0), 138 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0), 139 140 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0), 141 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0), 142 143 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0), 144 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0), 145 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0), 146 147 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0), 148 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0), 149 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0), 150 151 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]), 152 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0), 153 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0), 154 155 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0), 156 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0), 157 158 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0), 159 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv), 160 161 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), 162 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), 163 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv), 164 165 SOC_ENUM("Aux Mode", wm8974_auxmode), 166 167 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), 168 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1), 169 170 /* DAC / ADC oversampling */ 171 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0), 172 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0), 173 }; 174 175 /* Speaker Output Mixer */ 176 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = { 177 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0), 178 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0), 179 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0), 180 }; 181 182 /* Mono Output Mixer */ 183 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = { 184 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0), 185 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0), 186 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0), 187 }; 188 189 /* Boost mixer */ 190 static const struct snd_kcontrol_new wm8974_boost_mixer[] = { 191 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0), 192 }; 193 194 /* Input PGA */ 195 static const struct snd_kcontrol_new wm8974_inpga[] = { 196 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0), 197 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0), 198 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0), 199 }; 200 201 /* AUX Input boost vol */ 202 static const struct snd_kcontrol_new wm8974_aux_boost_controls = 203 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0); 204 205 /* Mic Input boost vol */ 206 static const struct snd_kcontrol_new wm8974_mic_boost_controls = 207 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0); 208 209 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = { 210 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0, 211 &wm8974_speaker_mixer_controls[0], 212 ARRAY_SIZE(wm8974_speaker_mixer_controls)), 213 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0, 214 &wm8974_mono_mixer_controls[0], 215 ARRAY_SIZE(wm8974_mono_mixer_controls)), 216 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0), 217 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0), 218 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0), 219 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0), 220 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0), 221 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0), 222 223 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga, 224 ARRAY_SIZE(wm8974_inpga)), 225 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, 226 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)), 227 228 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0), 229 230 SND_SOC_DAPM_INPUT("MICN"), 231 SND_SOC_DAPM_INPUT("MICP"), 232 SND_SOC_DAPM_INPUT("AUX"), 233 SND_SOC_DAPM_OUTPUT("MONOOUT"), 234 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 235 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 236 }; 237 238 static const struct snd_soc_dapm_route audio_map[] = { 239 /* Mono output mixer */ 240 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 241 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 242 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 243 244 /* Speaker output mixer */ 245 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 246 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 247 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 248 249 /* Outputs */ 250 {"Mono Out", NULL, "Mono Mixer"}, 251 {"MONOOUT", NULL, "Mono Out"}, 252 {"SpkN Out", NULL, "Speaker Mixer"}, 253 {"SpkP Out", NULL, "Speaker Mixer"}, 254 {"SPKOUTN", NULL, "SpkN Out"}, 255 {"SPKOUTP", NULL, "SpkP Out"}, 256 257 /* Boost Mixer */ 258 {"ADC", NULL, "Boost Mixer"}, 259 {"Boost Mixer", "Aux Switch", "Aux Input"}, 260 {"Boost Mixer", NULL, "Input PGA"}, 261 {"Boost Mixer", NULL, "MICP"}, 262 263 /* Input PGA */ 264 {"Input PGA", "Aux Switch", "Aux Input"}, 265 {"Input PGA", "MicN Switch", "MICN"}, 266 {"Input PGA", "MicP Switch", "MICP"}, 267 268 /* Inputs */ 269 {"Aux Input", NULL, "AUX"}, 270 }; 271 272 static int wm8974_add_widgets(struct snd_soc_codec *codec) 273 { 274 struct snd_soc_dapm_context *dapm = &codec->dapm; 275 276 snd_soc_dapm_new_controls(dapm, wm8974_dapm_widgets, 277 ARRAY_SIZE(wm8974_dapm_widgets)); 278 snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map)); 279 280 return 0; 281 } 282 283 struct pll_ { 284 unsigned int pre_div:1; 285 unsigned int n:4; 286 unsigned int k; 287 }; 288 289 /* The size in bits of the pll divide multiplied by 10 290 * to allow rounding later */ 291 #define FIXED_PLL_SIZE ((1 << 24) * 10) 292 293 static void pll_factors(struct pll_ *pll_div, 294 unsigned int target, unsigned int source) 295 { 296 unsigned long long Kpart; 297 unsigned int K, Ndiv, Nmod; 298 299 /* There is a fixed divide by 4 in the output path */ 300 target *= 4; 301 302 Ndiv = target / source; 303 if (Ndiv < 6) { 304 source /= 2; 305 pll_div->pre_div = 1; 306 Ndiv = target / source; 307 } else 308 pll_div->pre_div = 0; 309 310 if ((Ndiv < 6) || (Ndiv > 12)) 311 printk(KERN_WARNING 312 "WM8974 N value %u outwith recommended range!\n", 313 Ndiv); 314 315 pll_div->n = Ndiv; 316 Nmod = target % source; 317 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 318 319 do_div(Kpart, source); 320 321 K = Kpart & 0xFFFFFFFF; 322 323 /* Check if we need to round */ 324 if ((K % 10) >= 5) 325 K += 5; 326 327 /* Move down to proper range now rounding is done */ 328 K /= 10; 329 330 pll_div->k = K; 331 } 332 333 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 334 int source, unsigned int freq_in, unsigned int freq_out) 335 { 336 struct snd_soc_codec *codec = codec_dai->codec; 337 struct pll_ pll_div; 338 u16 reg; 339 340 if (freq_in == 0 || freq_out == 0) { 341 /* Clock CODEC directly from MCLK */ 342 reg = snd_soc_read(codec, WM8974_CLOCK); 343 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff); 344 345 /* Turn off PLL */ 346 reg = snd_soc_read(codec, WM8974_POWER1); 347 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df); 348 return 0; 349 } 350 351 pll_factors(&pll_div, freq_out, freq_in); 352 353 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); 354 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18); 355 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); 356 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff); 357 reg = snd_soc_read(codec, WM8974_POWER1); 358 snd_soc_write(codec, WM8974_POWER1, reg | 0x020); 359 360 /* Run CODEC from PLL instead of MCLK */ 361 reg = snd_soc_read(codec, WM8974_CLOCK); 362 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100); 363 364 return 0; 365 } 366 367 /* 368 * Configure WM8974 clock dividers. 369 */ 370 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 371 int div_id, int div) 372 { 373 struct snd_soc_codec *codec = codec_dai->codec; 374 u16 reg; 375 376 switch (div_id) { 377 case WM8974_OPCLKDIV: 378 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf; 379 snd_soc_write(codec, WM8974_GPIO, reg | div); 380 break; 381 case WM8974_MCLKDIV: 382 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f; 383 snd_soc_write(codec, WM8974_CLOCK, reg | div); 384 break; 385 case WM8974_BCLKDIV: 386 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3; 387 snd_soc_write(codec, WM8974_CLOCK, reg | div); 388 break; 389 default: 390 return -EINVAL; 391 } 392 393 return 0; 394 } 395 396 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, 397 unsigned int fmt) 398 { 399 struct snd_soc_codec *codec = codec_dai->codec; 400 u16 iface = 0; 401 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe; 402 403 /* set master/slave audio interface */ 404 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 405 case SND_SOC_DAIFMT_CBM_CFM: 406 clk |= 0x0001; 407 break; 408 case SND_SOC_DAIFMT_CBS_CFS: 409 break; 410 default: 411 return -EINVAL; 412 } 413 414 /* interface format */ 415 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 416 case SND_SOC_DAIFMT_I2S: 417 iface |= 0x0010; 418 break; 419 case SND_SOC_DAIFMT_RIGHT_J: 420 break; 421 case SND_SOC_DAIFMT_LEFT_J: 422 iface |= 0x0008; 423 break; 424 case SND_SOC_DAIFMT_DSP_A: 425 iface |= 0x00018; 426 break; 427 default: 428 return -EINVAL; 429 } 430 431 /* clock inversion */ 432 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 433 case SND_SOC_DAIFMT_NB_NF: 434 break; 435 case SND_SOC_DAIFMT_IB_IF: 436 iface |= 0x0180; 437 break; 438 case SND_SOC_DAIFMT_IB_NF: 439 iface |= 0x0100; 440 break; 441 case SND_SOC_DAIFMT_NB_IF: 442 iface |= 0x0080; 443 break; 444 default: 445 return -EINVAL; 446 } 447 448 snd_soc_write(codec, WM8974_IFACE, iface); 449 snd_soc_write(codec, WM8974_CLOCK, clk); 450 return 0; 451 } 452 453 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, 454 struct snd_pcm_hw_params *params, 455 struct snd_soc_dai *dai) 456 { 457 struct snd_soc_codec *codec = dai->codec; 458 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f; 459 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1; 460 461 /* bit size */ 462 switch (params_format(params)) { 463 case SNDRV_PCM_FORMAT_S16_LE: 464 break; 465 case SNDRV_PCM_FORMAT_S20_3LE: 466 iface |= 0x0020; 467 break; 468 case SNDRV_PCM_FORMAT_S24_LE: 469 iface |= 0x0040; 470 break; 471 case SNDRV_PCM_FORMAT_S32_LE: 472 iface |= 0x0060; 473 break; 474 } 475 476 /* filter coefficient */ 477 switch (params_rate(params)) { 478 case 8000: 479 adn |= 0x5 << 1; 480 break; 481 case 11025: 482 adn |= 0x4 << 1; 483 break; 484 case 16000: 485 adn |= 0x3 << 1; 486 break; 487 case 22050: 488 adn |= 0x2 << 1; 489 break; 490 case 32000: 491 adn |= 0x1 << 1; 492 break; 493 case 44100: 494 case 48000: 495 break; 496 } 497 498 snd_soc_write(codec, WM8974_IFACE, iface); 499 snd_soc_write(codec, WM8974_ADD, adn); 500 return 0; 501 } 502 503 static int wm8974_mute(struct snd_soc_dai *dai, int mute) 504 { 505 struct snd_soc_codec *codec = dai->codec; 506 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf; 507 508 if (mute) 509 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40); 510 else 511 snd_soc_write(codec, WM8974_DAC, mute_reg); 512 return 0; 513 } 514 515 /* liam need to make this lower power with dapm */ 516 static int wm8974_set_bias_level(struct snd_soc_codec *codec, 517 enum snd_soc_bias_level level) 518 { 519 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3; 520 521 switch (level) { 522 case SND_SOC_BIAS_ON: 523 case SND_SOC_BIAS_PREPARE: 524 power1 |= 0x1; /* VMID 50k */ 525 snd_soc_write(codec, WM8974_POWER1, power1); 526 break; 527 528 case SND_SOC_BIAS_STANDBY: 529 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; 530 531 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 532 snd_soc_cache_sync(codec); 533 534 /* Initial cap charge at VMID 5k */ 535 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3); 536 mdelay(100); 537 } 538 539 power1 |= 0x2; /* VMID 500k */ 540 snd_soc_write(codec, WM8974_POWER1, power1); 541 break; 542 543 case SND_SOC_BIAS_OFF: 544 snd_soc_write(codec, WM8974_POWER1, 0); 545 snd_soc_write(codec, WM8974_POWER2, 0); 546 snd_soc_write(codec, WM8974_POWER3, 0); 547 break; 548 } 549 550 codec->dapm.bias_level = level; 551 return 0; 552 } 553 554 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000) 555 556 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 557 SNDRV_PCM_FMTBIT_S24_LE) 558 559 static const struct snd_soc_dai_ops wm8974_ops = { 560 .hw_params = wm8974_pcm_hw_params, 561 .digital_mute = wm8974_mute, 562 .set_fmt = wm8974_set_dai_fmt, 563 .set_clkdiv = wm8974_set_dai_clkdiv, 564 .set_pll = wm8974_set_dai_pll, 565 }; 566 567 static struct snd_soc_dai_driver wm8974_dai = { 568 .name = "wm8974-hifi", 569 .playback = { 570 .stream_name = "Playback", 571 .channels_min = 1, 572 .channels_max = 2, /* Only 1 channel of data */ 573 .rates = WM8974_RATES, 574 .formats = WM8974_FORMATS,}, 575 .capture = { 576 .stream_name = "Capture", 577 .channels_min = 1, 578 .channels_max = 2, /* Only 1 channel of data */ 579 .rates = WM8974_RATES, 580 .formats = WM8974_FORMATS,}, 581 .ops = &wm8974_ops, 582 .symmetric_rates = 1, 583 }; 584 585 static int wm8974_suspend(struct snd_soc_codec *codec) 586 { 587 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 588 return 0; 589 } 590 591 static int wm8974_resume(struct snd_soc_codec *codec) 592 { 593 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 594 return 0; 595 } 596 597 static int wm8974_probe(struct snd_soc_codec *codec) 598 { 599 int ret = 0; 600 601 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C); 602 if (ret < 0) { 603 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 604 return ret; 605 } 606 607 ret = wm8974_reset(codec); 608 if (ret < 0) { 609 dev_err(codec->dev, "Failed to issue reset\n"); 610 return ret; 611 } 612 613 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 614 snd_soc_add_controls(codec, wm8974_snd_controls, 615 ARRAY_SIZE(wm8974_snd_controls)); 616 wm8974_add_widgets(codec); 617 618 return ret; 619 } 620 621 /* power down chip */ 622 static int wm8974_remove(struct snd_soc_codec *codec) 623 { 624 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 625 return 0; 626 } 627 628 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = { 629 .probe = wm8974_probe, 630 .remove = wm8974_remove, 631 .suspend = wm8974_suspend, 632 .resume = wm8974_resume, 633 .set_bias_level = wm8974_set_bias_level, 634 .reg_cache_size = ARRAY_SIZE(wm8974_reg), 635 .reg_word_size = sizeof(u16), 636 .reg_cache_default = wm8974_reg, 637 }; 638 639 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 640 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c, 641 const struct i2c_device_id *id) 642 { 643 struct wm8974_priv *wm8974; 644 int ret; 645 646 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL); 647 if (wm8974 == NULL) 648 return -ENOMEM; 649 650 i2c_set_clientdata(i2c, wm8974); 651 652 ret = snd_soc_register_codec(&i2c->dev, 653 &soc_codec_dev_wm8974, &wm8974_dai, 1); 654 if (ret < 0) 655 kfree(wm8974); 656 return ret; 657 } 658 659 static __devexit int wm8974_i2c_remove(struct i2c_client *client) 660 { 661 snd_soc_unregister_codec(&client->dev); 662 kfree(i2c_get_clientdata(client)); 663 return 0; 664 } 665 666 static const struct i2c_device_id wm8974_i2c_id[] = { 667 { "wm8974", 0 }, 668 { } 669 }; 670 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); 671 672 static struct i2c_driver wm8974_i2c_driver = { 673 .driver = { 674 .name = "wm8974", 675 .owner = THIS_MODULE, 676 }, 677 .probe = wm8974_i2c_probe, 678 .remove = __devexit_p(wm8974_i2c_remove), 679 .id_table = wm8974_i2c_id, 680 }; 681 #endif 682 683 static int __init wm8974_modinit(void) 684 { 685 int ret = 0; 686 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 687 ret = i2c_add_driver(&wm8974_i2c_driver); 688 if (ret != 0) { 689 printk(KERN_ERR "Failed to register wm8974 I2C driver: %d\n", 690 ret); 691 } 692 #endif 693 return ret; 694 } 695 module_init(wm8974_modinit); 696 697 static void __exit wm8974_exit(void) 698 { 699 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 700 i2c_del_driver(&wm8974_i2c_driver); 701 #endif 702 } 703 module_exit(wm8974_exit); 704 705 MODULE_DESCRIPTION("ASoC WM8974 driver"); 706 MODULE_AUTHOR("Liam Girdwood"); 707 MODULE_LICENSE("GPL"); 708