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 0x04 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 return 0; 280 } 281 282 struct pll_ { 283 unsigned int pre_div:1; 284 unsigned int n:4; 285 unsigned int k; 286 }; 287 288 /* The size in bits of the pll divide multiplied by 10 289 * to allow rounding later */ 290 #define FIXED_PLL_SIZE ((1 << 24) * 10) 291 292 static void pll_factors(struct pll_ *pll_div, 293 unsigned int target, unsigned int source) 294 { 295 unsigned long long Kpart; 296 unsigned int K, Ndiv, Nmod; 297 298 /* There is a fixed divide by 4 in the output path */ 299 target *= 4; 300 301 Ndiv = target / source; 302 if (Ndiv < 6) { 303 source /= 2; 304 pll_div->pre_div = 1; 305 Ndiv = target / source; 306 } else 307 pll_div->pre_div = 0; 308 309 if ((Ndiv < 6) || (Ndiv > 12)) 310 printk(KERN_WARNING 311 "WM8974 N value %u outwith recommended range!\n", 312 Ndiv); 313 314 pll_div->n = Ndiv; 315 Nmod = target % source; 316 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 317 318 do_div(Kpart, source); 319 320 K = Kpart & 0xFFFFFFFF; 321 322 /* Check if we need to round */ 323 if ((K % 10) >= 5) 324 K += 5; 325 326 /* Move down to proper range now rounding is done */ 327 K /= 10; 328 329 pll_div->k = K; 330 } 331 332 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 333 int source, unsigned int freq_in, unsigned int freq_out) 334 { 335 struct snd_soc_codec *codec = codec_dai->codec; 336 struct pll_ pll_div; 337 u16 reg; 338 339 if (freq_in == 0 || freq_out == 0) { 340 /* Clock CODEC directly from MCLK */ 341 reg = snd_soc_read(codec, WM8974_CLOCK); 342 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff); 343 344 /* Turn off PLL */ 345 reg = snd_soc_read(codec, WM8974_POWER1); 346 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df); 347 return 0; 348 } 349 350 pll_factors(&pll_div, freq_out, freq_in); 351 352 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); 353 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18); 354 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); 355 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff); 356 reg = snd_soc_read(codec, WM8974_POWER1); 357 snd_soc_write(codec, WM8974_POWER1, reg | 0x020); 358 359 /* Run CODEC from PLL instead of MCLK */ 360 reg = snd_soc_read(codec, WM8974_CLOCK); 361 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100); 362 363 return 0; 364 } 365 366 /* 367 * Configure WM8974 clock dividers. 368 */ 369 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 370 int div_id, int div) 371 { 372 struct snd_soc_codec *codec = codec_dai->codec; 373 u16 reg; 374 375 switch (div_id) { 376 case WM8974_OPCLKDIV: 377 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf; 378 snd_soc_write(codec, WM8974_GPIO, reg | div); 379 break; 380 case WM8974_MCLKDIV: 381 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f; 382 snd_soc_write(codec, WM8974_CLOCK, reg | div); 383 break; 384 case WM8974_ADCCLK: 385 reg = snd_soc_read(codec, WM8974_ADC) & 0x1f7; 386 snd_soc_write(codec, WM8974_ADC, reg | div); 387 break; 388 case WM8974_DACCLK: 389 reg = snd_soc_read(codec, WM8974_DAC) & 0x1f7; 390 snd_soc_write(codec, WM8974_DAC, reg | div); 391 break; 392 case WM8974_BCLKDIV: 393 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3; 394 snd_soc_write(codec, WM8974_CLOCK, reg | div); 395 break; 396 default: 397 return -EINVAL; 398 } 399 400 return 0; 401 } 402 403 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, 404 unsigned int fmt) 405 { 406 struct snd_soc_codec *codec = codec_dai->codec; 407 u16 iface = 0; 408 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe; 409 410 /* set master/slave audio interface */ 411 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 412 case SND_SOC_DAIFMT_CBM_CFM: 413 clk |= 0x0001; 414 break; 415 case SND_SOC_DAIFMT_CBS_CFS: 416 break; 417 default: 418 return -EINVAL; 419 } 420 421 /* interface format */ 422 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 423 case SND_SOC_DAIFMT_I2S: 424 iface |= 0x0010; 425 break; 426 case SND_SOC_DAIFMT_RIGHT_J: 427 break; 428 case SND_SOC_DAIFMT_LEFT_J: 429 iface |= 0x0008; 430 break; 431 case SND_SOC_DAIFMT_DSP_A: 432 iface |= 0x00018; 433 break; 434 default: 435 return -EINVAL; 436 } 437 438 /* clock inversion */ 439 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 440 case SND_SOC_DAIFMT_NB_NF: 441 break; 442 case SND_SOC_DAIFMT_IB_IF: 443 iface |= 0x0180; 444 break; 445 case SND_SOC_DAIFMT_IB_NF: 446 iface |= 0x0100; 447 break; 448 case SND_SOC_DAIFMT_NB_IF: 449 iface |= 0x0080; 450 break; 451 default: 452 return -EINVAL; 453 } 454 455 snd_soc_write(codec, WM8974_IFACE, iface); 456 snd_soc_write(codec, WM8974_CLOCK, clk); 457 return 0; 458 } 459 460 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, 461 struct snd_pcm_hw_params *params, 462 struct snd_soc_dai *dai) 463 { 464 struct snd_soc_codec *codec = dai->codec; 465 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f; 466 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1; 467 468 /* bit size */ 469 switch (params_format(params)) { 470 case SNDRV_PCM_FORMAT_S16_LE: 471 break; 472 case SNDRV_PCM_FORMAT_S20_3LE: 473 iface |= 0x0020; 474 break; 475 case SNDRV_PCM_FORMAT_S24_LE: 476 iface |= 0x0040; 477 break; 478 case SNDRV_PCM_FORMAT_S32_LE: 479 iface |= 0x0060; 480 break; 481 } 482 483 /* filter coefficient */ 484 switch (params_rate(params)) { 485 case 8000: 486 adn |= 0x5 << 1; 487 break; 488 case 11025: 489 adn |= 0x4 << 1; 490 break; 491 case 16000: 492 adn |= 0x3 << 1; 493 break; 494 case 22050: 495 adn |= 0x2 << 1; 496 break; 497 case 32000: 498 adn |= 0x1 << 1; 499 break; 500 case 44100: 501 case 48000: 502 break; 503 } 504 505 snd_soc_write(codec, WM8974_IFACE, iface); 506 snd_soc_write(codec, WM8974_ADD, adn); 507 return 0; 508 } 509 510 static int wm8974_mute(struct snd_soc_dai *dai, int mute) 511 { 512 struct snd_soc_codec *codec = dai->codec; 513 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf; 514 515 if (mute) 516 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40); 517 else 518 snd_soc_write(codec, WM8974_DAC, mute_reg); 519 return 0; 520 } 521 522 /* liam need to make this lower power with dapm */ 523 static int wm8974_set_bias_level(struct snd_soc_codec *codec, 524 enum snd_soc_bias_level level) 525 { 526 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3; 527 528 switch (level) { 529 case SND_SOC_BIAS_ON: 530 case SND_SOC_BIAS_PREPARE: 531 power1 |= 0x1; /* VMID 50k */ 532 snd_soc_write(codec, WM8974_POWER1, power1); 533 break; 534 535 case SND_SOC_BIAS_STANDBY: 536 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; 537 538 if (codec->bias_level == SND_SOC_BIAS_OFF) { 539 /* Initial cap charge at VMID 5k */ 540 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3); 541 mdelay(100); 542 } 543 544 power1 |= 0x2; /* VMID 500k */ 545 snd_soc_write(codec, WM8974_POWER1, power1); 546 break; 547 548 case SND_SOC_BIAS_OFF: 549 snd_soc_write(codec, WM8974_POWER1, 0); 550 snd_soc_write(codec, WM8974_POWER2, 0); 551 snd_soc_write(codec, WM8974_POWER3, 0); 552 break; 553 } 554 555 codec->bias_level = level; 556 return 0; 557 } 558 559 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000) 560 561 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 562 SNDRV_PCM_FMTBIT_S24_LE) 563 564 static struct snd_soc_dai_ops wm8974_ops = { 565 .hw_params = wm8974_pcm_hw_params, 566 .digital_mute = wm8974_mute, 567 .set_fmt = wm8974_set_dai_fmt, 568 .set_clkdiv = wm8974_set_dai_clkdiv, 569 .set_pll = wm8974_set_dai_pll, 570 }; 571 572 struct snd_soc_dai wm8974_dai = { 573 .name = "WM8974 HiFi", 574 .playback = { 575 .stream_name = "Playback", 576 .channels_min = 1, 577 .channels_max = 2, /* Only 1 channel of data */ 578 .rates = WM8974_RATES, 579 .formats = WM8974_FORMATS,}, 580 .capture = { 581 .stream_name = "Capture", 582 .channels_min = 1, 583 .channels_max = 2, /* Only 1 channel of data */ 584 .rates = WM8974_RATES, 585 .formats = WM8974_FORMATS,}, 586 .ops = &wm8974_ops, 587 .symmetric_rates = 1, 588 }; 589 EXPORT_SYMBOL_GPL(wm8974_dai); 590 591 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state) 592 { 593 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 594 struct snd_soc_codec *codec = socdev->card->codec; 595 596 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 597 return 0; 598 } 599 600 static int wm8974_resume(struct platform_device *pdev) 601 { 602 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 603 struct snd_soc_codec *codec = socdev->card->codec; 604 int i; 605 u8 data[2]; 606 u16 *cache = codec->reg_cache; 607 608 /* Sync reg_cache with the hardware */ 609 for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) { 610 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 611 data[1] = cache[i] & 0x00ff; 612 codec->hw_write(codec->control_data, data, 2); 613 } 614 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 615 wm8974_set_bias_level(codec, codec->suspend_bias_level); 616 return 0; 617 } 618 619 static int wm8974_probe(struct platform_device *pdev) 620 { 621 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 622 struct snd_soc_codec *codec; 623 int ret = 0; 624 625 if (wm8974_codec == NULL) { 626 dev_err(&pdev->dev, "Codec device not registered\n"); 627 return -ENODEV; 628 } 629 630 socdev->card->codec = wm8974_codec; 631 codec = wm8974_codec; 632 633 /* register pcms */ 634 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 635 if (ret < 0) { 636 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 637 goto pcm_err; 638 } 639 640 snd_soc_add_controls(codec, wm8974_snd_controls, 641 ARRAY_SIZE(wm8974_snd_controls)); 642 wm8974_add_widgets(codec); 643 644 return ret; 645 646 pcm_err: 647 return ret; 648 } 649 650 /* power down chip */ 651 static int wm8974_remove(struct platform_device *pdev) 652 { 653 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 654 655 snd_soc_free_pcms(socdev); 656 snd_soc_dapm_free(socdev); 657 658 return 0; 659 } 660 661 struct snd_soc_codec_device soc_codec_dev_wm8974 = { 662 .probe = wm8974_probe, 663 .remove = wm8974_remove, 664 .suspend = wm8974_suspend, 665 .resume = wm8974_resume, 666 }; 667 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974); 668 669 static __devinit int wm8974_register(struct wm8974_priv *wm8974) 670 { 671 int ret; 672 struct snd_soc_codec *codec = &wm8974->codec; 673 674 if (wm8974_codec) { 675 dev_err(codec->dev, "Another WM8974 is registered\n"); 676 return -EINVAL; 677 } 678 679 mutex_init(&codec->mutex); 680 INIT_LIST_HEAD(&codec->dapm_widgets); 681 INIT_LIST_HEAD(&codec->dapm_paths); 682 683 codec->private_data = wm8974; 684 codec->name = "WM8974"; 685 codec->owner = THIS_MODULE; 686 codec->bias_level = SND_SOC_BIAS_OFF; 687 codec->set_bias_level = wm8974_set_bias_level; 688 codec->dai = &wm8974_dai; 689 codec->num_dai = 1; 690 codec->reg_cache_size = WM8974_CACHEREGNUM; 691 codec->reg_cache = &wm8974->reg_cache; 692 693 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C); 694 if (ret < 0) { 695 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 696 goto err; 697 } 698 699 memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg)); 700 701 ret = wm8974_reset(codec); 702 if (ret < 0) { 703 dev_err(codec->dev, "Failed to issue reset\n"); 704 goto err; 705 } 706 707 wm8974_dai.dev = codec->dev; 708 709 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 710 711 wm8974_codec = codec; 712 713 ret = snd_soc_register_codec(codec); 714 if (ret != 0) { 715 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 716 goto err; 717 } 718 719 ret = snd_soc_register_dai(&wm8974_dai); 720 if (ret != 0) { 721 dev_err(codec->dev, "Failed to register DAI: %d\n", ret); 722 goto err_codec; 723 } 724 725 return 0; 726 727 err_codec: 728 snd_soc_unregister_codec(codec); 729 err: 730 kfree(wm8974); 731 return ret; 732 } 733 734 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974) 735 { 736 wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF); 737 snd_soc_unregister_dai(&wm8974_dai); 738 snd_soc_unregister_codec(&wm8974->codec); 739 kfree(wm8974); 740 wm8974_codec = NULL; 741 } 742 743 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c, 744 const struct i2c_device_id *id) 745 { 746 struct wm8974_priv *wm8974; 747 struct snd_soc_codec *codec; 748 749 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL); 750 if (wm8974 == NULL) 751 return -ENOMEM; 752 753 codec = &wm8974->codec; 754 codec->hw_write = (hw_write_t)i2c_master_send; 755 756 i2c_set_clientdata(i2c, wm8974); 757 codec->control_data = i2c; 758 759 codec->dev = &i2c->dev; 760 761 return wm8974_register(wm8974); 762 } 763 764 static __devexit int wm8974_i2c_remove(struct i2c_client *client) 765 { 766 struct wm8974_priv *wm8974 = i2c_get_clientdata(client); 767 wm8974_unregister(wm8974); 768 return 0; 769 } 770 771 static const struct i2c_device_id wm8974_i2c_id[] = { 772 { "wm8974", 0 }, 773 { } 774 }; 775 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); 776 777 static struct i2c_driver wm8974_i2c_driver = { 778 .driver = { 779 .name = "WM8974", 780 .owner = THIS_MODULE, 781 }, 782 .probe = wm8974_i2c_probe, 783 .remove = __devexit_p(wm8974_i2c_remove), 784 .id_table = wm8974_i2c_id, 785 }; 786 787 static int __init wm8974_modinit(void) 788 { 789 return i2c_add_driver(&wm8974_i2c_driver); 790 } 791 module_init(wm8974_modinit); 792 793 static void __exit wm8974_exit(void) 794 { 795 i2c_del_driver(&wm8974_i2c_driver); 796 } 797 module_exit(wm8974_exit); 798 799 MODULE_DESCRIPTION("ASoC WM8974 driver"); 800 MODULE_AUTHOR("Liam Girdwood"); 801 MODULE_LICENSE("GPL"); 802