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 <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 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 enum snd_soc_control_type control_type; 54 }; 55 56 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0) 57 58 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" }; 59 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" }; 60 static const char *wm8974_eqmode[] = {"Capture", "Playback" }; 61 static const char *wm8974_bw[] = {"Narrow", "Wide" }; 62 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" }; 63 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" }; 64 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" }; 65 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" }; 66 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" }; 67 static const char *wm8974_alc[] = {"ALC", "Limiter" }; 68 69 static const struct soc_enum wm8974_enum[] = { 70 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */ 71 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */ 72 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp), 73 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode), 74 75 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1), 76 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw), 77 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2), 78 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw), 79 80 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3), 81 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw), 82 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4), 83 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw), 84 85 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5), 86 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc), 87 }; 88 89 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" }; 90 91 static const struct soc_enum wm8974_auxmode = 92 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text); 93 94 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); 95 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); 96 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); 97 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); 98 99 static const struct snd_kcontrol_new wm8974_snd_controls[] = { 100 101 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0), 102 103 SOC_ENUM("DAC Companding", wm8974_enum[1]), 104 SOC_ENUM("ADC Companding", wm8974_enum[0]), 105 106 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]), 107 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0), 108 109 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv), 110 111 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0), 112 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0), 113 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0), 114 115 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv), 116 117 SOC_ENUM("Equaliser Function", wm8974_enum[3]), 118 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), 119 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv), 120 121 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]), 122 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), 123 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv), 124 125 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]), 126 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), 127 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv), 128 129 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]), 130 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), 131 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv), 132 133 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]), 134 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), 135 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv), 136 137 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0), 138 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0), 139 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0), 140 141 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0), 142 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0), 143 144 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0), 145 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0), 146 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0), 147 148 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0), 149 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0), 150 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0), 151 152 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]), 153 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0), 154 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0), 155 156 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0), 157 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0), 158 159 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0), 160 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv), 161 162 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), 163 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), 164 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv), 165 166 SOC_ENUM("Aux Mode", wm8974_auxmode), 167 168 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), 169 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1), 170 171 /* DAC / ADC oversampling */ 172 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0), 173 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0), 174 }; 175 176 /* Speaker Output Mixer */ 177 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = { 178 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0), 179 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0), 180 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0), 181 }; 182 183 /* Mono Output Mixer */ 184 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = { 185 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0), 186 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0), 187 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0), 188 }; 189 190 /* Boost mixer */ 191 static const struct snd_kcontrol_new wm8974_boost_mixer[] = { 192 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0), 193 }; 194 195 /* Input PGA */ 196 static const struct snd_kcontrol_new wm8974_inpga[] = { 197 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0), 198 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0), 199 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0), 200 }; 201 202 /* AUX Input boost vol */ 203 static const struct snd_kcontrol_new wm8974_aux_boost_controls = 204 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0); 205 206 /* Mic Input boost vol */ 207 static const struct snd_kcontrol_new wm8974_mic_boost_controls = 208 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0); 209 210 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = { 211 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0, 212 &wm8974_speaker_mixer_controls[0], 213 ARRAY_SIZE(wm8974_speaker_mixer_controls)), 214 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0, 215 &wm8974_mono_mixer_controls[0], 216 ARRAY_SIZE(wm8974_mono_mixer_controls)), 217 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0), 218 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0), 219 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0), 220 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0), 221 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0), 222 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0), 223 224 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga, 225 ARRAY_SIZE(wm8974_inpga)), 226 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, 227 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)), 228 229 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0), 230 231 SND_SOC_DAPM_INPUT("MICN"), 232 SND_SOC_DAPM_INPUT("MICP"), 233 SND_SOC_DAPM_INPUT("AUX"), 234 SND_SOC_DAPM_OUTPUT("MONOOUT"), 235 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 236 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 237 }; 238 239 static const struct snd_soc_dapm_route audio_map[] = { 240 /* Mono output mixer */ 241 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 242 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 243 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 244 245 /* Speaker output mixer */ 246 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 247 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 248 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 249 250 /* Outputs */ 251 {"Mono Out", NULL, "Mono Mixer"}, 252 {"MONOOUT", NULL, "Mono Out"}, 253 {"SpkN Out", NULL, "Speaker Mixer"}, 254 {"SpkP Out", NULL, "Speaker Mixer"}, 255 {"SPKOUTN", NULL, "SpkN Out"}, 256 {"SPKOUTP", NULL, "SpkP Out"}, 257 258 /* Boost Mixer */ 259 {"ADC", NULL, "Boost Mixer"}, 260 {"Boost Mixer", "Aux Switch", "Aux Input"}, 261 {"Boost Mixer", NULL, "Input PGA"}, 262 {"Boost Mixer", NULL, "MICP"}, 263 264 /* Input PGA */ 265 {"Input PGA", "Aux Switch", "Aux Input"}, 266 {"Input PGA", "MicN Switch", "MICN"}, 267 {"Input PGA", "MicP Switch", "MICP"}, 268 269 /* Inputs */ 270 {"Aux Input", NULL, "AUX"}, 271 }; 272 273 static int wm8974_add_widgets(struct snd_soc_codec *codec) 274 { 275 struct snd_soc_dapm_context *dapm = &codec->dapm; 276 277 snd_soc_dapm_new_controls(dapm, wm8974_dapm_widgets, 278 ARRAY_SIZE(wm8974_dapm_widgets)); 279 snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map)); 280 281 return 0; 282 } 283 284 struct pll_ { 285 unsigned int pre_div:1; 286 unsigned int n:4; 287 unsigned int k; 288 }; 289 290 /* The size in bits of the pll divide multiplied by 10 291 * to allow rounding later */ 292 #define FIXED_PLL_SIZE ((1 << 24) * 10) 293 294 static void pll_factors(struct pll_ *pll_div, 295 unsigned int target, unsigned int source) 296 { 297 unsigned long long Kpart; 298 unsigned int K, Ndiv, Nmod; 299 300 /* There is a fixed divide by 4 in the output path */ 301 target *= 4; 302 303 Ndiv = target / source; 304 if (Ndiv < 6) { 305 source /= 2; 306 pll_div->pre_div = 1; 307 Ndiv = target / source; 308 } else 309 pll_div->pre_div = 0; 310 311 if ((Ndiv < 6) || (Ndiv > 12)) 312 printk(KERN_WARNING 313 "WM8974 N value %u outwith recommended range!\n", 314 Ndiv); 315 316 pll_div->n = Ndiv; 317 Nmod = target % source; 318 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 319 320 do_div(Kpart, source); 321 322 K = Kpart & 0xFFFFFFFF; 323 324 /* Check if we need to round */ 325 if ((K % 10) >= 5) 326 K += 5; 327 328 /* Move down to proper range now rounding is done */ 329 K /= 10; 330 331 pll_div->k = K; 332 } 333 334 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 335 int source, unsigned int freq_in, unsigned int freq_out) 336 { 337 struct snd_soc_codec *codec = codec_dai->codec; 338 struct pll_ pll_div; 339 u16 reg; 340 341 if (freq_in == 0 || freq_out == 0) { 342 /* Clock CODEC directly from MCLK */ 343 reg = snd_soc_read(codec, WM8974_CLOCK); 344 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff); 345 346 /* Turn off PLL */ 347 reg = snd_soc_read(codec, WM8974_POWER1); 348 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df); 349 return 0; 350 } 351 352 pll_factors(&pll_div, freq_out, freq_in); 353 354 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); 355 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18); 356 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); 357 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff); 358 reg = snd_soc_read(codec, WM8974_POWER1); 359 snd_soc_write(codec, WM8974_POWER1, reg | 0x020); 360 361 /* Run CODEC from PLL instead of MCLK */ 362 reg = snd_soc_read(codec, WM8974_CLOCK); 363 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100); 364 365 return 0; 366 } 367 368 /* 369 * Configure WM8974 clock dividers. 370 */ 371 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 372 int div_id, int div) 373 { 374 struct snd_soc_codec *codec = codec_dai->codec; 375 u16 reg; 376 377 switch (div_id) { 378 case WM8974_OPCLKDIV: 379 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf; 380 snd_soc_write(codec, WM8974_GPIO, reg | div); 381 break; 382 case WM8974_MCLKDIV: 383 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f; 384 snd_soc_write(codec, WM8974_CLOCK, reg | div); 385 break; 386 case WM8974_BCLKDIV: 387 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3; 388 snd_soc_write(codec, WM8974_CLOCK, reg | div); 389 break; 390 default: 391 return -EINVAL; 392 } 393 394 return 0; 395 } 396 397 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, 398 unsigned int fmt) 399 { 400 struct snd_soc_codec *codec = codec_dai->codec; 401 u16 iface = 0; 402 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe; 403 404 /* set master/slave audio interface */ 405 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 406 case SND_SOC_DAIFMT_CBM_CFM: 407 clk |= 0x0001; 408 break; 409 case SND_SOC_DAIFMT_CBS_CFS: 410 break; 411 default: 412 return -EINVAL; 413 } 414 415 /* interface format */ 416 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 417 case SND_SOC_DAIFMT_I2S: 418 iface |= 0x0010; 419 break; 420 case SND_SOC_DAIFMT_RIGHT_J: 421 break; 422 case SND_SOC_DAIFMT_LEFT_J: 423 iface |= 0x0008; 424 break; 425 case SND_SOC_DAIFMT_DSP_A: 426 iface |= 0x00018; 427 break; 428 default: 429 return -EINVAL; 430 } 431 432 /* clock inversion */ 433 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 434 case SND_SOC_DAIFMT_NB_NF: 435 break; 436 case SND_SOC_DAIFMT_IB_IF: 437 iface |= 0x0180; 438 break; 439 case SND_SOC_DAIFMT_IB_NF: 440 iface |= 0x0100; 441 break; 442 case SND_SOC_DAIFMT_NB_IF: 443 iface |= 0x0080; 444 break; 445 default: 446 return -EINVAL; 447 } 448 449 snd_soc_write(codec, WM8974_IFACE, iface); 450 snd_soc_write(codec, WM8974_CLOCK, clk); 451 return 0; 452 } 453 454 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, 455 struct snd_pcm_hw_params *params, 456 struct snd_soc_dai *dai) 457 { 458 struct snd_soc_codec *codec = dai->codec; 459 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f; 460 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1; 461 462 /* bit size */ 463 switch (params_format(params)) { 464 case SNDRV_PCM_FORMAT_S16_LE: 465 break; 466 case SNDRV_PCM_FORMAT_S20_3LE: 467 iface |= 0x0020; 468 break; 469 case SNDRV_PCM_FORMAT_S24_LE: 470 iface |= 0x0040; 471 break; 472 case SNDRV_PCM_FORMAT_S32_LE: 473 iface |= 0x0060; 474 break; 475 } 476 477 /* filter coefficient */ 478 switch (params_rate(params)) { 479 case 8000: 480 adn |= 0x5 << 1; 481 break; 482 case 11025: 483 adn |= 0x4 << 1; 484 break; 485 case 16000: 486 adn |= 0x3 << 1; 487 break; 488 case 22050: 489 adn |= 0x2 << 1; 490 break; 491 case 32000: 492 adn |= 0x1 << 1; 493 break; 494 case 44100: 495 case 48000: 496 break; 497 } 498 499 snd_soc_write(codec, WM8974_IFACE, iface); 500 snd_soc_write(codec, WM8974_ADD, adn); 501 return 0; 502 } 503 504 static int wm8974_mute(struct snd_soc_dai *dai, int mute) 505 { 506 struct snd_soc_codec *codec = dai->codec; 507 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf; 508 509 if (mute) 510 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40); 511 else 512 snd_soc_write(codec, WM8974_DAC, mute_reg); 513 return 0; 514 } 515 516 /* liam need to make this lower power with dapm */ 517 static int wm8974_set_bias_level(struct snd_soc_codec *codec, 518 enum snd_soc_bias_level level) 519 { 520 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3; 521 522 switch (level) { 523 case SND_SOC_BIAS_ON: 524 case SND_SOC_BIAS_PREPARE: 525 power1 |= 0x1; /* VMID 50k */ 526 snd_soc_write(codec, WM8974_POWER1, power1); 527 break; 528 529 case SND_SOC_BIAS_STANDBY: 530 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; 531 532 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 533 /* Initial cap charge at VMID 5k */ 534 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3); 535 mdelay(100); 536 } 537 538 power1 |= 0x2; /* VMID 500k */ 539 snd_soc_write(codec, WM8974_POWER1, power1); 540 break; 541 542 case SND_SOC_BIAS_OFF: 543 snd_soc_write(codec, WM8974_POWER1, 0); 544 snd_soc_write(codec, WM8974_POWER2, 0); 545 snd_soc_write(codec, WM8974_POWER3, 0); 546 break; 547 } 548 549 codec->dapm.bias_level = level; 550 return 0; 551 } 552 553 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000) 554 555 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 556 SNDRV_PCM_FMTBIT_S24_LE) 557 558 static struct snd_soc_dai_ops wm8974_ops = { 559 .hw_params = wm8974_pcm_hw_params, 560 .digital_mute = wm8974_mute, 561 .set_fmt = wm8974_set_dai_fmt, 562 .set_clkdiv = wm8974_set_dai_clkdiv, 563 .set_pll = wm8974_set_dai_pll, 564 }; 565 566 static struct snd_soc_dai_driver wm8974_dai = { 567 .name = "wm8974-hifi", 568 .playback = { 569 .stream_name = "Playback", 570 .channels_min = 1, 571 .channels_max = 2, /* Only 1 channel of data */ 572 .rates = WM8974_RATES, 573 .formats = WM8974_FORMATS,}, 574 .capture = { 575 .stream_name = "Capture", 576 .channels_min = 1, 577 .channels_max = 2, /* Only 1 channel of data */ 578 .rates = WM8974_RATES, 579 .formats = WM8974_FORMATS,}, 580 .ops = &wm8974_ops, 581 .symmetric_rates = 1, 582 }; 583 584 static int wm8974_suspend(struct snd_soc_codec *codec, pm_message_t state) 585 { 586 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 587 return 0; 588 } 589 590 static int wm8974_resume(struct snd_soc_codec *codec) 591 { 592 int i; 593 u8 data[2]; 594 u16 *cache = codec->reg_cache; 595 596 /* Sync reg_cache with the hardware */ 597 for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) { 598 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 599 data[1] = cache[i] & 0x00ff; 600 codec->hw_write(codec->control_data, data, 2); 601 } 602 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 603 604 return 0; 605 } 606 607 static int wm8974_probe(struct snd_soc_codec *codec) 608 { 609 int ret = 0; 610 611 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C); 612 if (ret < 0) { 613 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 614 return ret; 615 } 616 617 ret = wm8974_reset(codec); 618 if (ret < 0) { 619 dev_err(codec->dev, "Failed to issue reset\n"); 620 return ret; 621 } 622 623 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 624 snd_soc_add_controls(codec, wm8974_snd_controls, 625 ARRAY_SIZE(wm8974_snd_controls)); 626 wm8974_add_widgets(codec); 627 628 return ret; 629 } 630 631 /* power down chip */ 632 static int wm8974_remove(struct snd_soc_codec *codec) 633 { 634 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 635 return 0; 636 } 637 638 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = { 639 .probe = wm8974_probe, 640 .remove = wm8974_remove, 641 .suspend = wm8974_suspend, 642 .resume = wm8974_resume, 643 .set_bias_level = wm8974_set_bias_level, 644 .reg_cache_size = ARRAY_SIZE(wm8974_reg), 645 .reg_word_size = sizeof(u16), 646 .reg_cache_default = wm8974_reg, 647 }; 648 649 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 650 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c, 651 const struct i2c_device_id *id) 652 { 653 struct wm8974_priv *wm8974; 654 int ret; 655 656 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL); 657 if (wm8974 == NULL) 658 return -ENOMEM; 659 660 i2c_set_clientdata(i2c, wm8974); 661 662 ret = snd_soc_register_codec(&i2c->dev, 663 &soc_codec_dev_wm8974, &wm8974_dai, 1); 664 if (ret < 0) 665 kfree(wm8974); 666 return ret; 667 } 668 669 static __devexit int wm8974_i2c_remove(struct i2c_client *client) 670 { 671 snd_soc_unregister_codec(&client->dev); 672 kfree(i2c_get_clientdata(client)); 673 return 0; 674 } 675 676 static const struct i2c_device_id wm8974_i2c_id[] = { 677 { "wm8974", 0 }, 678 { } 679 }; 680 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); 681 682 static struct i2c_driver wm8974_i2c_driver = { 683 .driver = { 684 .name = "wm8974-codec", 685 .owner = THIS_MODULE, 686 }, 687 .probe = wm8974_i2c_probe, 688 .remove = __devexit_p(wm8974_i2c_remove), 689 .id_table = wm8974_i2c_id, 690 }; 691 #endif 692 693 static int __init wm8974_modinit(void) 694 { 695 int ret = 0; 696 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 697 ret = i2c_add_driver(&wm8974_i2c_driver); 698 if (ret != 0) { 699 printk(KERN_ERR "Failed to register wm8974 I2C driver: %d\n", 700 ret); 701 } 702 #endif 703 return ret; 704 } 705 module_init(wm8974_modinit); 706 707 static void __exit wm8974_exit(void) 708 { 709 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 710 i2c_del_driver(&wm8974_i2c_driver); 711 #endif 712 } 713 module_exit(wm8974_exit); 714 715 MODULE_DESCRIPTION("ASoC WM8974 driver"); 716 MODULE_AUTHOR("Liam Girdwood"); 717 MODULE_LICENSE("GPL"); 718