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/soc-dapm.h> 27 #include <sound/initval.h> 28 #include <sound/tlv.h> 29 30 #include "wm8974.h" 31 32 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = { 33 0x0000, 0x0000, 0x0000, 0x0000, 34 0x0050, 0x0000, 0x0140, 0x0000, 35 0x0000, 0x0000, 0x0000, 0x00ff, 36 0x0000, 0x0000, 0x0100, 0x00ff, 37 0x0000, 0x0000, 0x012c, 0x002c, 38 0x002c, 0x002c, 0x002c, 0x0000, 39 0x0032, 0x0000, 0x0000, 0x0000, 40 0x0000, 0x0000, 0x0000, 0x0000, 41 0x0038, 0x000b, 0x0032, 0x0000, 42 0x0008, 0x000c, 0x0093, 0x00e9, 43 0x0000, 0x0000, 0x0000, 0x0000, 44 0x0003, 0x0010, 0x0000, 0x0000, 45 0x0000, 0x0002, 0x0000, 0x0000, 46 0x0000, 0x0000, 0x0039, 0x0000, 47 0x0000, 48 }; 49 50 #define WM8974_POWER1_BIASEN 0x08 51 #define WM8974_POWER1_BUFIOEN 0x04 52 53 struct wm8974_priv { 54 enum snd_soc_control_type control_type; 55 u16 reg_cache[WM8974_CACHEREGNUM]; 56 }; 57 58 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0) 59 60 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" }; 61 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" }; 62 static const char *wm8974_eqmode[] = {"Capture", "Playback" }; 63 static const char *wm8974_bw[] = {"Narrow", "Wide" }; 64 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" }; 65 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" }; 66 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" }; 67 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" }; 68 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" }; 69 static const char *wm8974_alc[] = {"ALC", "Limiter" }; 70 71 static const struct soc_enum wm8974_enum[] = { 72 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */ 73 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */ 74 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp), 75 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode), 76 77 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1), 78 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw), 79 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2), 80 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw), 81 82 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3), 83 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw), 84 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4), 85 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw), 86 87 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5), 88 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc), 89 }; 90 91 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" }; 92 93 static const struct soc_enum wm8974_auxmode = 94 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text); 95 96 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); 97 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); 98 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); 99 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); 100 101 static const struct snd_kcontrol_new wm8974_snd_controls[] = { 102 103 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0), 104 105 SOC_ENUM("DAC Companding", wm8974_enum[1]), 106 SOC_ENUM("ADC Companding", wm8974_enum[0]), 107 108 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]), 109 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0), 110 111 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv), 112 113 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0), 114 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0), 115 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0), 116 117 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv), 118 119 SOC_ENUM("Equaliser Function", wm8974_enum[3]), 120 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), 121 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv), 122 123 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]), 124 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), 125 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv), 126 127 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]), 128 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), 129 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv), 130 131 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]), 132 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), 133 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv), 134 135 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]), 136 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), 137 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv), 138 139 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0), 140 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0), 141 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0), 142 143 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0), 144 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0), 145 146 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0), 147 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0), 148 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0), 149 150 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0), 151 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0), 152 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0), 153 154 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]), 155 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0), 156 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0), 157 158 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0), 159 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0), 160 161 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0), 162 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv), 163 164 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), 165 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), 166 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv), 167 168 SOC_ENUM("Aux Mode", wm8974_auxmode), 169 170 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), 171 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1), 172 173 /* DAC / ADC oversampling */ 174 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0), 175 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0), 176 }; 177 178 /* Speaker Output Mixer */ 179 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = { 180 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0), 181 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0), 182 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0), 183 }; 184 185 /* Mono Output Mixer */ 186 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = { 187 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0), 188 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0), 189 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0), 190 }; 191 192 /* Boost mixer */ 193 static const struct snd_kcontrol_new wm8974_boost_mixer[] = { 194 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0), 195 }; 196 197 /* Input PGA */ 198 static const struct snd_kcontrol_new wm8974_inpga[] = { 199 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0), 200 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0), 201 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0), 202 }; 203 204 /* AUX Input boost vol */ 205 static const struct snd_kcontrol_new wm8974_aux_boost_controls = 206 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0); 207 208 /* Mic Input boost vol */ 209 static const struct snd_kcontrol_new wm8974_mic_boost_controls = 210 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0); 211 212 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = { 213 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0, 214 &wm8974_speaker_mixer_controls[0], 215 ARRAY_SIZE(wm8974_speaker_mixer_controls)), 216 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0, 217 &wm8974_mono_mixer_controls[0], 218 ARRAY_SIZE(wm8974_mono_mixer_controls)), 219 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0), 220 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0), 221 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0), 222 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0), 223 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0), 224 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0), 225 226 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga, 227 ARRAY_SIZE(wm8974_inpga)), 228 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, 229 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)), 230 231 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0), 232 233 SND_SOC_DAPM_INPUT("MICN"), 234 SND_SOC_DAPM_INPUT("MICP"), 235 SND_SOC_DAPM_INPUT("AUX"), 236 SND_SOC_DAPM_OUTPUT("MONOOUT"), 237 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 238 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 239 }; 240 241 static const struct snd_soc_dapm_route audio_map[] = { 242 /* Mono output mixer */ 243 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 244 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 245 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 246 247 /* Speaker output mixer */ 248 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 249 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 250 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 251 252 /* Outputs */ 253 {"Mono Out", NULL, "Mono Mixer"}, 254 {"MONOOUT", NULL, "Mono Out"}, 255 {"SpkN Out", NULL, "Speaker Mixer"}, 256 {"SpkP Out", NULL, "Speaker Mixer"}, 257 {"SPKOUTN", NULL, "SpkN Out"}, 258 {"SPKOUTP", NULL, "SpkP Out"}, 259 260 /* Boost Mixer */ 261 {"ADC", NULL, "Boost Mixer"}, 262 {"Boost Mixer", "Aux Switch", "Aux Input"}, 263 {"Boost Mixer", NULL, "Input PGA"}, 264 {"Boost Mixer", NULL, "MICP"}, 265 266 /* Input PGA */ 267 {"Input PGA", "Aux Switch", "Aux Input"}, 268 {"Input PGA", "MicN Switch", "MICN"}, 269 {"Input PGA", "MicP Switch", "MICP"}, 270 271 /* Inputs */ 272 {"Aux Input", NULL, "AUX"}, 273 }; 274 275 static int wm8974_add_widgets(struct snd_soc_codec *codec) 276 { 277 snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets, 278 ARRAY_SIZE(wm8974_dapm_widgets)); 279 280 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 281 282 return 0; 283 } 284 285 struct pll_ { 286 unsigned int pre_div:1; 287 unsigned int n:4; 288 unsigned int k; 289 }; 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(struct pll_ *pll_div, 296 unsigned int target, unsigned int source) 297 { 298 unsigned long long Kpart; 299 unsigned int K, Ndiv, Nmod; 300 301 /* There is a fixed divide by 4 in the output path */ 302 target *= 4; 303 304 Ndiv = target / source; 305 if (Ndiv < 6) { 306 source /= 2; 307 pll_div->pre_div = 1; 308 Ndiv = target / source; 309 } else 310 pll_div->pre_div = 0; 311 312 if ((Ndiv < 6) || (Ndiv > 12)) 313 printk(KERN_WARNING 314 "WM8974 N value %u outwith recommended range!\n", 315 Ndiv); 316 317 pll_div->n = Ndiv; 318 Nmod = target % source; 319 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 320 321 do_div(Kpart, source); 322 323 K = Kpart & 0xFFFFFFFF; 324 325 /* Check if we need to round */ 326 if ((K % 10) >= 5) 327 K += 5; 328 329 /* Move down to proper range now rounding is done */ 330 K /= 10; 331 332 pll_div->k = K; 333 } 334 335 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 336 int source, unsigned int freq_in, unsigned int freq_out) 337 { 338 struct snd_soc_codec *codec = codec_dai->codec; 339 struct pll_ pll_div; 340 u16 reg; 341 342 if (freq_in == 0 || freq_out == 0) { 343 /* Clock CODEC directly from MCLK */ 344 reg = snd_soc_read(codec, WM8974_CLOCK); 345 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff); 346 347 /* Turn off PLL */ 348 reg = snd_soc_read(codec, WM8974_POWER1); 349 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df); 350 return 0; 351 } 352 353 pll_factors(&pll_div, freq_out, freq_in); 354 355 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); 356 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18); 357 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); 358 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff); 359 reg = snd_soc_read(codec, WM8974_POWER1); 360 snd_soc_write(codec, WM8974_POWER1, reg | 0x020); 361 362 /* Run CODEC from PLL instead of MCLK */ 363 reg = snd_soc_read(codec, WM8974_CLOCK); 364 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100); 365 366 return 0; 367 } 368 369 /* 370 * Configure WM8974 clock dividers. 371 */ 372 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 373 int div_id, int div) 374 { 375 struct snd_soc_codec *codec = codec_dai->codec; 376 u16 reg; 377 378 switch (div_id) { 379 case WM8974_OPCLKDIV: 380 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf; 381 snd_soc_write(codec, WM8974_GPIO, reg | div); 382 break; 383 case WM8974_MCLKDIV: 384 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f; 385 snd_soc_write(codec, WM8974_CLOCK, reg | div); 386 break; 387 case WM8974_BCLKDIV: 388 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3; 389 snd_soc_write(codec, WM8974_CLOCK, reg | div); 390 break; 391 default: 392 return -EINVAL; 393 } 394 395 return 0; 396 } 397 398 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, 399 unsigned int fmt) 400 { 401 struct snd_soc_codec *codec = codec_dai->codec; 402 u16 iface = 0; 403 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe; 404 405 /* set master/slave audio interface */ 406 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 407 case SND_SOC_DAIFMT_CBM_CFM: 408 clk |= 0x0001; 409 break; 410 case SND_SOC_DAIFMT_CBS_CFS: 411 break; 412 default: 413 return -EINVAL; 414 } 415 416 /* interface format */ 417 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 418 case SND_SOC_DAIFMT_I2S: 419 iface |= 0x0010; 420 break; 421 case SND_SOC_DAIFMT_RIGHT_J: 422 break; 423 case SND_SOC_DAIFMT_LEFT_J: 424 iface |= 0x0008; 425 break; 426 case SND_SOC_DAIFMT_DSP_A: 427 iface |= 0x00018; 428 break; 429 default: 430 return -EINVAL; 431 } 432 433 /* clock inversion */ 434 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 435 case SND_SOC_DAIFMT_NB_NF: 436 break; 437 case SND_SOC_DAIFMT_IB_IF: 438 iface |= 0x0180; 439 break; 440 case SND_SOC_DAIFMT_IB_NF: 441 iface |= 0x0100; 442 break; 443 case SND_SOC_DAIFMT_NB_IF: 444 iface |= 0x0080; 445 break; 446 default: 447 return -EINVAL; 448 } 449 450 snd_soc_write(codec, WM8974_IFACE, iface); 451 snd_soc_write(codec, WM8974_CLOCK, clk); 452 return 0; 453 } 454 455 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, 456 struct snd_pcm_hw_params *params, 457 struct snd_soc_dai *dai) 458 { 459 struct snd_soc_codec *codec = dai->codec; 460 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f; 461 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1; 462 463 /* bit size */ 464 switch (params_format(params)) { 465 case SNDRV_PCM_FORMAT_S16_LE: 466 break; 467 case SNDRV_PCM_FORMAT_S20_3LE: 468 iface |= 0x0020; 469 break; 470 case SNDRV_PCM_FORMAT_S24_LE: 471 iface |= 0x0040; 472 break; 473 case SNDRV_PCM_FORMAT_S32_LE: 474 iface |= 0x0060; 475 break; 476 } 477 478 /* filter coefficient */ 479 switch (params_rate(params)) { 480 case 8000: 481 adn |= 0x5 << 1; 482 break; 483 case 11025: 484 adn |= 0x4 << 1; 485 break; 486 case 16000: 487 adn |= 0x3 << 1; 488 break; 489 case 22050: 490 adn |= 0x2 << 1; 491 break; 492 case 32000: 493 adn |= 0x1 << 1; 494 break; 495 case 44100: 496 case 48000: 497 break; 498 } 499 500 snd_soc_write(codec, WM8974_IFACE, iface); 501 snd_soc_write(codec, WM8974_ADD, adn); 502 return 0; 503 } 504 505 static int wm8974_mute(struct snd_soc_dai *dai, int mute) 506 { 507 struct snd_soc_codec *codec = dai->codec; 508 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf; 509 510 if (mute) 511 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40); 512 else 513 snd_soc_write(codec, WM8974_DAC, mute_reg); 514 return 0; 515 } 516 517 /* liam need to make this lower power with dapm */ 518 static int wm8974_set_bias_level(struct snd_soc_codec *codec, 519 enum snd_soc_bias_level level) 520 { 521 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3; 522 523 switch (level) { 524 case SND_SOC_BIAS_ON: 525 case SND_SOC_BIAS_PREPARE: 526 power1 |= 0x1; /* VMID 50k */ 527 snd_soc_write(codec, WM8974_POWER1, power1); 528 break; 529 530 case SND_SOC_BIAS_STANDBY: 531 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; 532 533 if (codec->bias_level == SND_SOC_BIAS_OFF) { 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->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 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, pm_message_t state) 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 int i; 594 u8 data[2]; 595 u16 *cache = codec->reg_cache; 596 597 /* Sync reg_cache with the hardware */ 598 for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) { 599 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 600 data[1] = cache[i] & 0x00ff; 601 codec->hw_write(codec->control_data, data, 2); 602 } 603 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 604 605 return 0; 606 } 607 608 static int wm8974_probe(struct snd_soc_codec *codec) 609 { 610 int ret = 0; 611 612 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C); 613 if (ret < 0) { 614 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 615 return ret; 616 } 617 618 ret = wm8974_reset(codec); 619 if (ret < 0) { 620 dev_err(codec->dev, "Failed to issue reset\n"); 621 return ret; 622 } 623 624 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 625 snd_soc_add_controls(codec, wm8974_snd_controls, 626 ARRAY_SIZE(wm8974_snd_controls)); 627 wm8974_add_widgets(codec); 628 629 return ret; 630 } 631 632 /* power down chip */ 633 static int wm8974_remove(struct snd_soc_codec *codec) 634 { 635 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 636 return 0; 637 } 638 639 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = { 640 .probe = wm8974_probe, 641 .remove = wm8974_remove, 642 .suspend = wm8974_suspend, 643 .resume = wm8974_resume, 644 .set_bias_level = wm8974_set_bias_level, 645 .reg_cache_size = ARRAY_SIZE(wm8974_reg), 646 .reg_word_size = sizeof(u16), 647 .reg_cache_default = wm8974_reg, 648 }; 649 650 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 651 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c, 652 const struct i2c_device_id *id) 653 { 654 struct wm8974_priv *wm8974; 655 int ret; 656 657 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL); 658 if (wm8974 == NULL) 659 return -ENOMEM; 660 661 i2c_set_clientdata(i2c, wm8974); 662 663 ret = snd_soc_register_codec(&i2c->dev, 664 &soc_codec_dev_wm8974, &wm8974_dai, 1); 665 if (ret < 0) 666 kfree(wm8974); 667 return ret; 668 } 669 670 static __devexit int wm8974_i2c_remove(struct i2c_client *client) 671 { 672 snd_soc_unregister_codec(&client->dev); 673 kfree(i2c_get_clientdata(client)); 674 return 0; 675 } 676 677 static const struct i2c_device_id wm8974_i2c_id[] = { 678 { "wm8974", 0 }, 679 { } 680 }; 681 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); 682 683 static struct i2c_driver wm8974_i2c_driver = { 684 .driver = { 685 .name = "wm8974-codec", 686 .owner = THIS_MODULE, 687 }, 688 .probe = wm8974_i2c_probe, 689 .remove = __devexit_p(wm8974_i2c_remove), 690 .id_table = wm8974_i2c_id, 691 }; 692 #endif 693 694 static int __init wm8974_modinit(void) 695 { 696 int ret = 0; 697 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 698 ret = i2c_add_driver(&wm8974_i2c_driver); 699 if (ret != 0) { 700 printk(KERN_ERR "Failed to register wm8974 I2C driver: %d\n", 701 ret); 702 } 703 #endif 704 return ret; 705 } 706 module_init(wm8974_modinit); 707 708 static void __exit wm8974_exit(void) 709 { 710 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 711 i2c_del_driver(&wm8974_i2c_driver); 712 #endif 713 } 714 module_exit(wm8974_exit); 715 716 MODULE_DESCRIPTION("ASoC WM8974 driver"); 717 MODULE_AUTHOR("Liam Girdwood"); 718 MODULE_LICENSE("GPL"); 719