1 /* 2 * wm8974.c -- WM8974 ALSA Soc Audio driver 3 * 4 * Copyright 2006-2009 Wolfson Microelectronics PLC. 5 * 6 * Author: Liam Girdwood <linux@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/platform_device.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/soc-dapm.h> 26 #include <sound/initval.h> 27 #include <sound/tlv.h> 28 29 #include "wm8974.h" 30 31 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = { 32 0x0000, 0x0000, 0x0000, 0x0000, 33 0x0050, 0x0000, 0x0140, 0x0000, 34 0x0000, 0x0000, 0x0000, 0x00ff, 35 0x0000, 0x0000, 0x0100, 0x00ff, 36 0x0000, 0x0000, 0x012c, 0x002c, 37 0x002c, 0x002c, 0x002c, 0x0000, 38 0x0032, 0x0000, 0x0000, 0x0000, 39 0x0000, 0x0000, 0x0000, 0x0000, 40 0x0038, 0x000b, 0x0032, 0x0000, 41 0x0008, 0x000c, 0x0093, 0x00e9, 42 0x0000, 0x0000, 0x0000, 0x0000, 43 0x0003, 0x0010, 0x0000, 0x0000, 44 0x0000, 0x0002, 0x0000, 0x0000, 45 0x0000, 0x0000, 0x0039, 0x0000, 46 0x0000, 47 }; 48 49 #define WM8974_POWER1_BIASEN 0x08 50 #define WM8974_POWER1_BUFIOEN 0x10 51 52 struct wm8974_priv { 53 struct snd_soc_codec codec; 54 u16 reg_cache[WM8974_CACHEREGNUM]; 55 }; 56 57 static struct snd_soc_codec *wm8974_codec; 58 59 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0) 60 61 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" }; 62 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" }; 63 static const char *wm8974_eqmode[] = {"Capture", "Playback" }; 64 static const char *wm8974_bw[] = {"Narrow", "Wide" }; 65 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" }; 66 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" }; 67 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" }; 68 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" }; 69 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" }; 70 static const char *wm8974_alc[] = {"ALC", "Limiter" }; 71 72 static const struct soc_enum wm8974_enum[] = { 73 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */ 74 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */ 75 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp), 76 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode), 77 78 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1), 79 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw), 80 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2), 81 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw), 82 83 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3), 84 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw), 85 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4), 86 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw), 87 88 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5), 89 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc), 90 }; 91 92 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" }; 93 94 static const struct soc_enum wm8974_auxmode = 95 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text); 96 97 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); 98 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); 99 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); 100 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); 101 102 static const struct snd_kcontrol_new wm8974_snd_controls[] = { 103 104 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0), 105 106 SOC_ENUM("DAC Companding", wm8974_enum[1]), 107 SOC_ENUM("ADC Companding", wm8974_enum[0]), 108 109 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]), 110 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0), 111 112 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv), 113 114 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0), 115 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0), 116 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0), 117 118 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv), 119 120 SOC_ENUM("Equaliser Function", wm8974_enum[3]), 121 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), 122 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv), 123 124 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]), 125 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), 126 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv), 127 128 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]), 129 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), 130 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv), 131 132 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]), 133 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), 134 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv), 135 136 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]), 137 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), 138 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv), 139 140 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0), 141 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0), 142 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0), 143 144 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0), 145 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0), 146 147 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0), 148 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0), 149 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0), 150 151 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0), 152 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0), 153 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0), 154 155 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]), 156 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0), 157 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0), 158 159 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0), 160 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0), 161 162 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0), 163 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv), 164 165 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), 166 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), 167 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv), 168 169 SOC_ENUM("Aux Mode", wm8974_auxmode), 170 171 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), 172 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1), 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, 1), 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_MICBIAS("Mic Bias", WM8974_POWER1, 4, 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 snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets, 275 ARRAY_SIZE(wm8974_dapm_widgets)); 276 277 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 278 279 snd_soc_dapm_new_widgets(codec); 280 return 0; 281 } 282 283 struct pll_ { 284 unsigned int pre_div:4; /* prescale - 1 */ 285 unsigned int n:4; 286 unsigned int k; 287 }; 288 289 static struct pll_ pll_div; 290 291 /* The size in bits of the pll divide multiplied by 10 292 * to allow rounding later */ 293 #define FIXED_PLL_SIZE ((1 << 24) * 10) 294 295 static void pll_factors(unsigned int target, unsigned int source) 296 { 297 unsigned long long Kpart; 298 unsigned int K, Ndiv, Nmod; 299 300 Ndiv = target / source; 301 if (Ndiv < 6) { 302 source >>= 1; 303 pll_div.pre_div = 1; 304 Ndiv = target / source; 305 } else 306 pll_div.pre_div = 0; 307 308 if ((Ndiv < 6) || (Ndiv > 12)) 309 printk(KERN_WARNING 310 "WM8974 N value %u outwith recommended range!\n", 311 Ndiv); 312 313 pll_div.n = Ndiv; 314 Nmod = target % source; 315 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 316 317 do_div(Kpart, source); 318 319 K = Kpart & 0xFFFFFFFF; 320 321 /* Check if we need to round */ 322 if ((K % 10) >= 5) 323 K += 5; 324 325 /* Move down to proper range now rounding is done */ 326 K /= 10; 327 328 pll_div.k = K; 329 } 330 331 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, 332 int pll_id, unsigned int freq_in, unsigned int freq_out) 333 { 334 struct snd_soc_codec *codec = codec_dai->codec; 335 u16 reg; 336 337 if (freq_in == 0 || freq_out == 0) { 338 /* Clock CODEC directly from MCLK */ 339 reg = snd_soc_read(codec, WM8974_CLOCK); 340 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff); 341 342 /* Turn off PLL */ 343 reg = snd_soc_read(codec, WM8974_POWER1); 344 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df); 345 return 0; 346 } 347 348 pll_factors(freq_out*4, freq_in); 349 350 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); 351 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18); 352 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); 353 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff); 354 reg = snd_soc_read(codec, WM8974_POWER1); 355 snd_soc_write(codec, WM8974_POWER1, reg | 0x020); 356 357 /* Run CODEC from PLL instead of MCLK */ 358 reg = snd_soc_read(codec, WM8974_CLOCK); 359 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100); 360 361 return 0; 362 } 363 364 /* 365 * Configure WM8974 clock dividers. 366 */ 367 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 368 int div_id, int div) 369 { 370 struct snd_soc_codec *codec = codec_dai->codec; 371 u16 reg; 372 373 switch (div_id) { 374 case WM8974_OPCLKDIV: 375 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf; 376 snd_soc_write(codec, WM8974_GPIO, reg | div); 377 break; 378 case WM8974_MCLKDIV: 379 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f; 380 snd_soc_write(codec, WM8974_CLOCK, reg | div); 381 break; 382 case WM8974_ADCCLK: 383 reg = snd_soc_read(codec, WM8974_ADC) & 0x1f7; 384 snd_soc_write(codec, WM8974_ADC, reg | div); 385 break; 386 case WM8974_DACCLK: 387 reg = snd_soc_read(codec, WM8974_DAC) & 0x1f7; 388 snd_soc_write(codec, WM8974_DAC, reg | div); 389 break; 390 case WM8974_BCLKDIV: 391 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3; 392 snd_soc_write(codec, WM8974_CLOCK, reg | div); 393 break; 394 default: 395 return -EINVAL; 396 } 397 398 return 0; 399 } 400 401 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, 402 unsigned int fmt) 403 { 404 struct snd_soc_codec *codec = codec_dai->codec; 405 u16 iface = 0; 406 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe; 407 408 /* set master/slave audio interface */ 409 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 410 case SND_SOC_DAIFMT_CBM_CFM: 411 clk |= 0x0001; 412 break; 413 case SND_SOC_DAIFMT_CBS_CFS: 414 break; 415 default: 416 return -EINVAL; 417 } 418 419 /* interface format */ 420 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 421 case SND_SOC_DAIFMT_I2S: 422 iface |= 0x0010; 423 break; 424 case SND_SOC_DAIFMT_RIGHT_J: 425 break; 426 case SND_SOC_DAIFMT_LEFT_J: 427 iface |= 0x0008; 428 break; 429 case SND_SOC_DAIFMT_DSP_A: 430 iface |= 0x00018; 431 break; 432 default: 433 return -EINVAL; 434 } 435 436 /* clock inversion */ 437 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 438 case SND_SOC_DAIFMT_NB_NF: 439 break; 440 case SND_SOC_DAIFMT_IB_IF: 441 iface |= 0x0180; 442 break; 443 case SND_SOC_DAIFMT_IB_NF: 444 iface |= 0x0100; 445 break; 446 case SND_SOC_DAIFMT_NB_IF: 447 iface |= 0x0080; 448 break; 449 default: 450 return -EINVAL; 451 } 452 453 snd_soc_write(codec, WM8974_IFACE, iface); 454 snd_soc_write(codec, WM8974_CLOCK, clk); 455 return 0; 456 } 457 458 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, 459 struct snd_pcm_hw_params *params, 460 struct snd_soc_dai *dai) 461 { 462 struct snd_soc_codec *codec = dai->codec; 463 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f; 464 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1; 465 466 /* bit size */ 467 switch (params_format(params)) { 468 case SNDRV_PCM_FORMAT_S16_LE: 469 break; 470 case SNDRV_PCM_FORMAT_S20_3LE: 471 iface |= 0x0020; 472 break; 473 case SNDRV_PCM_FORMAT_S24_LE: 474 iface |= 0x0040; 475 break; 476 case SNDRV_PCM_FORMAT_S32_LE: 477 iface |= 0x0060; 478 break; 479 } 480 481 /* filter coefficient */ 482 switch (params_rate(params)) { 483 case SNDRV_PCM_RATE_8000: 484 adn |= 0x5 << 1; 485 break; 486 case SNDRV_PCM_RATE_11025: 487 adn |= 0x4 << 1; 488 break; 489 case SNDRV_PCM_RATE_16000: 490 adn |= 0x3 << 1; 491 break; 492 case SNDRV_PCM_RATE_22050: 493 adn |= 0x2 << 1; 494 break; 495 case SNDRV_PCM_RATE_32000: 496 adn |= 0x1 << 1; 497 break; 498 case SNDRV_PCM_RATE_44100: 499 case SNDRV_PCM_RATE_48000: 500 break; 501 } 502 503 snd_soc_write(codec, WM8974_IFACE, iface); 504 snd_soc_write(codec, WM8974_ADD, adn); 505 return 0; 506 } 507 508 static int wm8974_mute(struct snd_soc_dai *dai, int mute) 509 { 510 struct snd_soc_codec *codec = dai->codec; 511 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf; 512 513 if (mute) 514 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40); 515 else 516 snd_soc_write(codec, WM8974_DAC, mute_reg); 517 return 0; 518 } 519 520 /* liam need to make this lower power with dapm */ 521 static int wm8974_set_bias_level(struct snd_soc_codec *codec, 522 enum snd_soc_bias_level level) 523 { 524 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3; 525 526 switch (level) { 527 case SND_SOC_BIAS_ON: 528 case SND_SOC_BIAS_PREPARE: 529 power1 |= 0x1; /* VMID 50k */ 530 snd_soc_write(codec, WM8974_POWER1, power1); 531 break; 532 533 case SND_SOC_BIAS_STANDBY: 534 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; 535 536 if (codec->bias_level == SND_SOC_BIAS_OFF) { 537 /* Initial cap charge at VMID 5k */ 538 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3); 539 mdelay(100); 540 } 541 542 power1 |= 0x2; /* VMID 500k */ 543 snd_soc_write(codec, WM8974_POWER1, power1); 544 break; 545 546 case SND_SOC_BIAS_OFF: 547 snd_soc_write(codec, WM8974_POWER1, 0); 548 snd_soc_write(codec, WM8974_POWER2, 0); 549 snd_soc_write(codec, WM8974_POWER3, 0); 550 break; 551 } 552 553 codec->bias_level = level; 554 return 0; 555 } 556 557 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000) 558 559 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 560 SNDRV_PCM_FMTBIT_S24_LE) 561 562 static struct snd_soc_dai_ops wm8974_ops = { 563 .hw_params = wm8974_pcm_hw_params, 564 .digital_mute = wm8974_mute, 565 .set_fmt = wm8974_set_dai_fmt, 566 .set_clkdiv = wm8974_set_dai_clkdiv, 567 .set_pll = wm8974_set_dai_pll, 568 }; 569 570 struct snd_soc_dai wm8974_dai = { 571 .name = "WM8974 HiFi", 572 .playback = { 573 .stream_name = "Playback", 574 .channels_min = 1, 575 .channels_max = 2, /* Only 1 channel of data */ 576 .rates = WM8974_RATES, 577 .formats = WM8974_FORMATS,}, 578 .capture = { 579 .stream_name = "Capture", 580 .channels_min = 1, 581 .channels_max = 2, /* Only 1 channel of data */ 582 .rates = WM8974_RATES, 583 .formats = WM8974_FORMATS,}, 584 .ops = &wm8974_ops, 585 .symmetric_rates = 1, 586 }; 587 EXPORT_SYMBOL_GPL(wm8974_dai); 588 589 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state) 590 { 591 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 592 struct snd_soc_codec *codec = socdev->card->codec; 593 594 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 595 return 0; 596 } 597 598 static int wm8974_resume(struct platform_device *pdev) 599 { 600 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 601 struct snd_soc_codec *codec = socdev->card->codec; 602 int i; 603 u8 data[2]; 604 u16 *cache = codec->reg_cache; 605 606 /* Sync reg_cache with the hardware */ 607 for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) { 608 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 609 data[1] = cache[i] & 0x00ff; 610 codec->hw_write(codec->control_data, data, 2); 611 } 612 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 613 wm8974_set_bias_level(codec, codec->suspend_bias_level); 614 return 0; 615 } 616 617 static int wm8974_probe(struct platform_device *pdev) 618 { 619 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 620 struct snd_soc_codec *codec; 621 int ret = 0; 622 623 if (wm8974_codec == NULL) { 624 dev_err(&pdev->dev, "Codec device not registered\n"); 625 return -ENODEV; 626 } 627 628 socdev->card->codec = wm8974_codec; 629 codec = wm8974_codec; 630 631 /* register pcms */ 632 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 633 if (ret < 0) { 634 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 635 goto pcm_err; 636 } 637 638 snd_soc_add_controls(codec, wm8974_snd_controls, 639 ARRAY_SIZE(wm8974_snd_controls)); 640 wm8974_add_widgets(codec); 641 ret = snd_soc_init_card(socdev); 642 if (ret < 0) { 643 dev_err(codec->dev, "failed to register card: %d\n", ret); 644 goto card_err; 645 } 646 647 return ret; 648 649 card_err: 650 snd_soc_free_pcms(socdev); 651 snd_soc_dapm_free(socdev); 652 pcm_err: 653 return ret; 654 } 655 656 /* power down chip */ 657 static int wm8974_remove(struct platform_device *pdev) 658 { 659 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 660 661 snd_soc_free_pcms(socdev); 662 snd_soc_dapm_free(socdev); 663 664 return 0; 665 } 666 667 struct snd_soc_codec_device soc_codec_dev_wm8974 = { 668 .probe = wm8974_probe, 669 .remove = wm8974_remove, 670 .suspend = wm8974_suspend, 671 .resume = wm8974_resume, 672 }; 673 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974); 674 675 static __devinit int wm8974_register(struct wm8974_priv *wm8974) 676 { 677 int ret; 678 struct snd_soc_codec *codec = &wm8974->codec; 679 680 if (wm8974_codec) { 681 dev_err(codec->dev, "Another WM8974 is registered\n"); 682 return -EINVAL; 683 } 684 685 mutex_init(&codec->mutex); 686 INIT_LIST_HEAD(&codec->dapm_widgets); 687 INIT_LIST_HEAD(&codec->dapm_paths); 688 689 codec->private_data = wm8974; 690 codec->name = "WM8974"; 691 codec->owner = THIS_MODULE; 692 codec->bias_level = SND_SOC_BIAS_OFF; 693 codec->set_bias_level = wm8974_set_bias_level; 694 codec->dai = &wm8974_dai; 695 codec->num_dai = 1; 696 codec->reg_cache_size = WM8974_CACHEREGNUM; 697 codec->reg_cache = &wm8974->reg_cache; 698 699 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C); 700 if (ret < 0) { 701 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 702 goto err; 703 } 704 705 memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg)); 706 707 ret = wm8974_reset(codec); 708 if (ret < 0) { 709 dev_err(codec->dev, "Failed to issue reset\n"); 710 goto err; 711 } 712 713 wm8974_dai.dev = codec->dev; 714 715 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 716 717 wm8974_codec = codec; 718 719 ret = snd_soc_register_codec(codec); 720 if (ret != 0) { 721 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 722 goto err; 723 } 724 725 ret = snd_soc_register_dai(&wm8974_dai); 726 if (ret != 0) { 727 dev_err(codec->dev, "Failed to register DAI: %d\n", ret); 728 goto err_codec; 729 } 730 731 return 0; 732 733 err_codec: 734 snd_soc_unregister_codec(codec); 735 err: 736 kfree(wm8974); 737 return ret; 738 } 739 740 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974) 741 { 742 wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF); 743 snd_soc_unregister_dai(&wm8974_dai); 744 snd_soc_unregister_codec(&wm8974->codec); 745 kfree(wm8974); 746 wm8974_codec = NULL; 747 } 748 749 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c, 750 const struct i2c_device_id *id) 751 { 752 struct wm8974_priv *wm8974; 753 struct snd_soc_codec *codec; 754 755 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL); 756 if (wm8974 == NULL) 757 return -ENOMEM; 758 759 codec = &wm8974->codec; 760 codec->hw_write = (hw_write_t)i2c_master_send; 761 762 i2c_set_clientdata(i2c, wm8974); 763 codec->control_data = i2c; 764 765 codec->dev = &i2c->dev; 766 767 return wm8974_register(wm8974); 768 } 769 770 static __devexit int wm8974_i2c_remove(struct i2c_client *client) 771 { 772 struct wm8974_priv *wm8974 = i2c_get_clientdata(client); 773 wm8974_unregister(wm8974); 774 return 0; 775 } 776 777 static const struct i2c_device_id wm8974_i2c_id[] = { 778 { "wm8974", 0 }, 779 { } 780 }; 781 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); 782 783 static struct i2c_driver wm8974_i2c_driver = { 784 .driver = { 785 .name = "WM8974", 786 .owner = THIS_MODULE, 787 }, 788 .probe = wm8974_i2c_probe, 789 .remove = __devexit_p(wm8974_i2c_remove), 790 .id_table = wm8974_i2c_id, 791 }; 792 793 static int __init wm8974_modinit(void) 794 { 795 return i2c_add_driver(&wm8974_i2c_driver); 796 } 797 module_init(wm8974_modinit); 798 799 static void __exit wm8974_exit(void) 800 { 801 i2c_del_driver(&wm8974_i2c_driver); 802 } 803 module_exit(wm8974_exit); 804 805 MODULE_DESCRIPTION("ASoC WM8974 driver"); 806 MODULE_AUTHOR("Liam Girdwood"); 807 MODULE_LICENSE("GPL"); 808