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 struct snd_soc_codec codec; 55 u16 reg_cache[WM8974_CACHEREGNUM]; 56 }; 57 58 static struct snd_soc_codec *wm8974_codec; 59 60 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0) 61 62 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" }; 63 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" }; 64 static const char *wm8974_eqmode[] = {"Capture", "Playback" }; 65 static const char *wm8974_bw[] = {"Narrow", "Wide" }; 66 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" }; 67 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" }; 68 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" }; 69 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" }; 70 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" }; 71 static const char *wm8974_alc[] = {"ALC", "Limiter" }; 72 73 static const struct soc_enum wm8974_enum[] = { 74 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */ 75 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */ 76 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp), 77 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode), 78 79 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1), 80 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw), 81 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2), 82 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw), 83 84 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3), 85 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw), 86 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4), 87 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw), 88 89 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5), 90 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc), 91 }; 92 93 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" }; 94 95 static const struct soc_enum wm8974_auxmode = 96 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text); 97 98 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); 99 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); 100 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); 101 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); 102 103 static const struct snd_kcontrol_new wm8974_snd_controls[] = { 104 105 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0), 106 107 SOC_ENUM("DAC Companding", wm8974_enum[1]), 108 SOC_ENUM("ADC Companding", wm8974_enum[0]), 109 110 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]), 111 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0), 112 113 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv), 114 115 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0), 116 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0), 117 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0), 118 119 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv), 120 121 SOC_ENUM("Equaliser Function", wm8974_enum[3]), 122 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), 123 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv), 124 125 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]), 126 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), 127 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv), 128 129 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]), 130 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), 131 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv), 132 133 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]), 134 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), 135 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv), 136 137 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]), 138 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), 139 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv), 140 141 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0), 142 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0), 143 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0), 144 145 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0), 146 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0), 147 148 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0), 149 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0), 150 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0), 151 152 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0), 153 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0), 154 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0), 155 156 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]), 157 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0), 158 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0), 159 160 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0), 161 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0), 162 163 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0), 164 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv), 165 166 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), 167 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), 168 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv), 169 170 SOC_ENUM("Aux Mode", wm8974_auxmode), 171 172 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), 173 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1), 174 175 /* DAC / ADC oversampling */ 176 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0), 177 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0), 178 }; 179 180 /* Speaker Output Mixer */ 181 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = { 182 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0), 183 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0), 184 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0), 185 }; 186 187 /* Mono Output Mixer */ 188 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = { 189 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0), 190 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0), 191 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0), 192 }; 193 194 /* Boost mixer */ 195 static const struct snd_kcontrol_new wm8974_boost_mixer[] = { 196 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0), 197 }; 198 199 /* Input PGA */ 200 static const struct snd_kcontrol_new wm8974_inpga[] = { 201 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0), 202 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0), 203 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0), 204 }; 205 206 /* AUX Input boost vol */ 207 static const struct snd_kcontrol_new wm8974_aux_boost_controls = 208 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0); 209 210 /* Mic Input boost vol */ 211 static const struct snd_kcontrol_new wm8974_mic_boost_controls = 212 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0); 213 214 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = { 215 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0, 216 &wm8974_speaker_mixer_controls[0], 217 ARRAY_SIZE(wm8974_speaker_mixer_controls)), 218 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0, 219 &wm8974_mono_mixer_controls[0], 220 ARRAY_SIZE(wm8974_mono_mixer_controls)), 221 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0), 222 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0), 223 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0), 224 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0), 225 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0), 226 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0), 227 228 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga, 229 ARRAY_SIZE(wm8974_inpga)), 230 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, 231 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)), 232 233 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0), 234 235 SND_SOC_DAPM_INPUT("MICN"), 236 SND_SOC_DAPM_INPUT("MICP"), 237 SND_SOC_DAPM_INPUT("AUX"), 238 SND_SOC_DAPM_OUTPUT("MONOOUT"), 239 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 240 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 241 }; 242 243 static const struct snd_soc_dapm_route audio_map[] = { 244 /* Mono output mixer */ 245 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 246 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 247 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 248 249 /* Speaker output mixer */ 250 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 251 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 252 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 253 254 /* Outputs */ 255 {"Mono Out", NULL, "Mono Mixer"}, 256 {"MONOOUT", NULL, "Mono Out"}, 257 {"SpkN Out", NULL, "Speaker Mixer"}, 258 {"SpkP Out", NULL, "Speaker Mixer"}, 259 {"SPKOUTN", NULL, "SpkN Out"}, 260 {"SPKOUTP", NULL, "SpkP Out"}, 261 262 /* Boost Mixer */ 263 {"ADC", NULL, "Boost Mixer"}, 264 {"Boost Mixer", "Aux Switch", "Aux Input"}, 265 {"Boost Mixer", NULL, "Input PGA"}, 266 {"Boost Mixer", NULL, "MICP"}, 267 268 /* Input PGA */ 269 {"Input PGA", "Aux Switch", "Aux Input"}, 270 {"Input PGA", "MicN Switch", "MICN"}, 271 {"Input PGA", "MicP Switch", "MICP"}, 272 273 /* Inputs */ 274 {"Aux Input", NULL, "AUX"}, 275 }; 276 277 static int wm8974_add_widgets(struct snd_soc_codec *codec) 278 { 279 snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets, 280 ARRAY_SIZE(wm8974_dapm_widgets)); 281 282 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 283 284 return 0; 285 } 286 287 struct pll_ { 288 unsigned int pre_div:1; 289 unsigned int n:4; 290 unsigned int k; 291 }; 292 293 /* The size in bits of the pll divide multiplied by 10 294 * to allow rounding later */ 295 #define FIXED_PLL_SIZE ((1 << 24) * 10) 296 297 static void pll_factors(struct pll_ *pll_div, 298 unsigned int target, unsigned int source) 299 { 300 unsigned long long Kpart; 301 unsigned int K, Ndiv, Nmod; 302 303 /* There is a fixed divide by 4 in the output path */ 304 target *= 4; 305 306 Ndiv = target / source; 307 if (Ndiv < 6) { 308 source /= 2; 309 pll_div->pre_div = 1; 310 Ndiv = target / source; 311 } else 312 pll_div->pre_div = 0; 313 314 if ((Ndiv < 6) || (Ndiv > 12)) 315 printk(KERN_WARNING 316 "WM8974 N value %u outwith recommended range!\n", 317 Ndiv); 318 319 pll_div->n = Ndiv; 320 Nmod = target % source; 321 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 322 323 do_div(Kpart, source); 324 325 K = Kpart & 0xFFFFFFFF; 326 327 /* Check if we need to round */ 328 if ((K % 10) >= 5) 329 K += 5; 330 331 /* Move down to proper range now rounding is done */ 332 K /= 10; 333 334 pll_div->k = K; 335 } 336 337 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 338 int source, unsigned int freq_in, unsigned int freq_out) 339 { 340 struct snd_soc_codec *codec = codec_dai->codec; 341 struct pll_ pll_div; 342 u16 reg; 343 344 if (freq_in == 0 || freq_out == 0) { 345 /* Clock CODEC directly from MCLK */ 346 reg = snd_soc_read(codec, WM8974_CLOCK); 347 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff); 348 349 /* Turn off PLL */ 350 reg = snd_soc_read(codec, WM8974_POWER1); 351 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df); 352 return 0; 353 } 354 355 pll_factors(&pll_div, freq_out, freq_in); 356 357 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); 358 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18); 359 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); 360 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff); 361 reg = snd_soc_read(codec, WM8974_POWER1); 362 snd_soc_write(codec, WM8974_POWER1, reg | 0x020); 363 364 /* Run CODEC from PLL instead of MCLK */ 365 reg = snd_soc_read(codec, WM8974_CLOCK); 366 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100); 367 368 return 0; 369 } 370 371 /* 372 * Configure WM8974 clock dividers. 373 */ 374 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 375 int div_id, int div) 376 { 377 struct snd_soc_codec *codec = codec_dai->codec; 378 u16 reg; 379 380 switch (div_id) { 381 case WM8974_OPCLKDIV: 382 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf; 383 snd_soc_write(codec, WM8974_GPIO, reg | div); 384 break; 385 case WM8974_MCLKDIV: 386 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f; 387 snd_soc_write(codec, WM8974_CLOCK, reg | div); 388 break; 389 case WM8974_BCLKDIV: 390 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3; 391 snd_soc_write(codec, WM8974_CLOCK, reg | div); 392 break; 393 default: 394 return -EINVAL; 395 } 396 397 return 0; 398 } 399 400 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, 401 unsigned int fmt) 402 { 403 struct snd_soc_codec *codec = codec_dai->codec; 404 u16 iface = 0; 405 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe; 406 407 /* set master/slave audio interface */ 408 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 409 case SND_SOC_DAIFMT_CBM_CFM: 410 clk |= 0x0001; 411 break; 412 case SND_SOC_DAIFMT_CBS_CFS: 413 break; 414 default: 415 return -EINVAL; 416 } 417 418 /* interface format */ 419 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 420 case SND_SOC_DAIFMT_I2S: 421 iface |= 0x0010; 422 break; 423 case SND_SOC_DAIFMT_RIGHT_J: 424 break; 425 case SND_SOC_DAIFMT_LEFT_J: 426 iface |= 0x0008; 427 break; 428 case SND_SOC_DAIFMT_DSP_A: 429 iface |= 0x00018; 430 break; 431 default: 432 return -EINVAL; 433 } 434 435 /* clock inversion */ 436 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 437 case SND_SOC_DAIFMT_NB_NF: 438 break; 439 case SND_SOC_DAIFMT_IB_IF: 440 iface |= 0x0180; 441 break; 442 case SND_SOC_DAIFMT_IB_NF: 443 iface |= 0x0100; 444 break; 445 case SND_SOC_DAIFMT_NB_IF: 446 iface |= 0x0080; 447 break; 448 default: 449 return -EINVAL; 450 } 451 452 snd_soc_write(codec, WM8974_IFACE, iface); 453 snd_soc_write(codec, WM8974_CLOCK, clk); 454 return 0; 455 } 456 457 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, 458 struct snd_pcm_hw_params *params, 459 struct snd_soc_dai *dai) 460 { 461 struct snd_soc_codec *codec = dai->codec; 462 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f; 463 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1; 464 465 /* bit size */ 466 switch (params_format(params)) { 467 case SNDRV_PCM_FORMAT_S16_LE: 468 break; 469 case SNDRV_PCM_FORMAT_S20_3LE: 470 iface |= 0x0020; 471 break; 472 case SNDRV_PCM_FORMAT_S24_LE: 473 iface |= 0x0040; 474 break; 475 case SNDRV_PCM_FORMAT_S32_LE: 476 iface |= 0x0060; 477 break; 478 } 479 480 /* filter coefficient */ 481 switch (params_rate(params)) { 482 case 8000: 483 adn |= 0x5 << 1; 484 break; 485 case 11025: 486 adn |= 0x4 << 1; 487 break; 488 case 16000: 489 adn |= 0x3 << 1; 490 break; 491 case 22050: 492 adn |= 0x2 << 1; 493 break; 494 case 32000: 495 adn |= 0x1 << 1; 496 break; 497 case 44100: 498 case 48000: 499 break; 500 } 501 502 snd_soc_write(codec, WM8974_IFACE, iface); 503 snd_soc_write(codec, WM8974_ADD, adn); 504 return 0; 505 } 506 507 static int wm8974_mute(struct snd_soc_dai *dai, int mute) 508 { 509 struct snd_soc_codec *codec = dai->codec; 510 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf; 511 512 if (mute) 513 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40); 514 else 515 snd_soc_write(codec, WM8974_DAC, mute_reg); 516 return 0; 517 } 518 519 /* liam need to make this lower power with dapm */ 520 static int wm8974_set_bias_level(struct snd_soc_codec *codec, 521 enum snd_soc_bias_level level) 522 { 523 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3; 524 525 switch (level) { 526 case SND_SOC_BIAS_ON: 527 case SND_SOC_BIAS_PREPARE: 528 power1 |= 0x1; /* VMID 50k */ 529 snd_soc_write(codec, WM8974_POWER1, power1); 530 break; 531 532 case SND_SOC_BIAS_STANDBY: 533 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; 534 535 if (codec->bias_level == SND_SOC_BIAS_OFF) { 536 /* Initial cap charge at VMID 5k */ 537 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3); 538 mdelay(100); 539 } 540 541 power1 |= 0x2; /* VMID 500k */ 542 snd_soc_write(codec, WM8974_POWER1, power1); 543 break; 544 545 case SND_SOC_BIAS_OFF: 546 snd_soc_write(codec, WM8974_POWER1, 0); 547 snd_soc_write(codec, WM8974_POWER2, 0); 548 snd_soc_write(codec, WM8974_POWER3, 0); 549 break; 550 } 551 552 codec->bias_level = level; 553 return 0; 554 } 555 556 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000) 557 558 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 559 SNDRV_PCM_FMTBIT_S24_LE) 560 561 static struct snd_soc_dai_ops wm8974_ops = { 562 .hw_params = wm8974_pcm_hw_params, 563 .digital_mute = wm8974_mute, 564 .set_fmt = wm8974_set_dai_fmt, 565 .set_clkdiv = wm8974_set_dai_clkdiv, 566 .set_pll = wm8974_set_dai_pll, 567 }; 568 569 struct snd_soc_dai wm8974_dai = { 570 .name = "WM8974 HiFi", 571 .playback = { 572 .stream_name = "Playback", 573 .channels_min = 1, 574 .channels_max = 2, /* Only 1 channel of data */ 575 .rates = WM8974_RATES, 576 .formats = WM8974_FORMATS,}, 577 .capture = { 578 .stream_name = "Capture", 579 .channels_min = 1, 580 .channels_max = 2, /* Only 1 channel of data */ 581 .rates = WM8974_RATES, 582 .formats = WM8974_FORMATS,}, 583 .ops = &wm8974_ops, 584 .symmetric_rates = 1, 585 }; 586 EXPORT_SYMBOL_GPL(wm8974_dai); 587 588 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state) 589 { 590 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 591 struct snd_soc_codec *codec = socdev->card->codec; 592 593 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); 594 return 0; 595 } 596 597 static int wm8974_resume(struct platform_device *pdev) 598 { 599 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 600 struct snd_soc_codec *codec = socdev->card->codec; 601 int i; 602 u8 data[2]; 603 u16 *cache = codec->reg_cache; 604 605 /* Sync reg_cache with the hardware */ 606 for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) { 607 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); 608 data[1] = cache[i] & 0x00ff; 609 codec->hw_write(codec->control_data, data, 2); 610 } 611 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 612 613 return 0; 614 } 615 616 static int wm8974_probe(struct platform_device *pdev) 617 { 618 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 619 struct snd_soc_codec *codec; 620 int ret = 0; 621 622 if (wm8974_codec == NULL) { 623 dev_err(&pdev->dev, "Codec device not registered\n"); 624 return -ENODEV; 625 } 626 627 socdev->card->codec = wm8974_codec; 628 codec = wm8974_codec; 629 630 /* register pcms */ 631 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 632 if (ret < 0) { 633 dev_err(codec->dev, "failed to create pcms: %d\n", ret); 634 goto pcm_err; 635 } 636 637 snd_soc_add_controls(codec, wm8974_snd_controls, 638 ARRAY_SIZE(wm8974_snd_controls)); 639 wm8974_add_widgets(codec); 640 641 return ret; 642 643 pcm_err: 644 return ret; 645 } 646 647 /* power down chip */ 648 static int wm8974_remove(struct platform_device *pdev) 649 { 650 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 651 652 snd_soc_free_pcms(socdev); 653 snd_soc_dapm_free(socdev); 654 655 return 0; 656 } 657 658 struct snd_soc_codec_device soc_codec_dev_wm8974 = { 659 .probe = wm8974_probe, 660 .remove = wm8974_remove, 661 .suspend = wm8974_suspend, 662 .resume = wm8974_resume, 663 }; 664 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974); 665 666 static __devinit int wm8974_register(struct wm8974_priv *wm8974) 667 { 668 int ret; 669 struct snd_soc_codec *codec = &wm8974->codec; 670 671 if (wm8974_codec) { 672 dev_err(codec->dev, "Another WM8974 is registered\n"); 673 return -EINVAL; 674 } 675 676 mutex_init(&codec->mutex); 677 INIT_LIST_HEAD(&codec->dapm_widgets); 678 INIT_LIST_HEAD(&codec->dapm_paths); 679 680 snd_soc_codec_set_drvdata(codec, wm8974); 681 codec->name = "WM8974"; 682 codec->owner = THIS_MODULE; 683 codec->bias_level = SND_SOC_BIAS_OFF; 684 codec->set_bias_level = wm8974_set_bias_level; 685 codec->dai = &wm8974_dai; 686 codec->num_dai = 1; 687 codec->reg_cache_size = WM8974_CACHEREGNUM; 688 codec->reg_cache = &wm8974->reg_cache; 689 690 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C); 691 if (ret < 0) { 692 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 693 goto err; 694 } 695 696 memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg)); 697 698 ret = wm8974_reset(codec); 699 if (ret < 0) { 700 dev_err(codec->dev, "Failed to issue reset\n"); 701 goto err; 702 } 703 704 wm8974_dai.dev = codec->dev; 705 706 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 707 708 wm8974_codec = codec; 709 710 ret = snd_soc_register_codec(codec); 711 if (ret != 0) { 712 dev_err(codec->dev, "Failed to register codec: %d\n", ret); 713 goto err; 714 } 715 716 ret = snd_soc_register_dai(&wm8974_dai); 717 if (ret != 0) { 718 dev_err(codec->dev, "Failed to register DAI: %d\n", ret); 719 goto err_codec; 720 } 721 722 return 0; 723 724 err_codec: 725 snd_soc_unregister_codec(codec); 726 err: 727 kfree(wm8974); 728 return ret; 729 } 730 731 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974) 732 { 733 wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF); 734 snd_soc_unregister_dai(&wm8974_dai); 735 snd_soc_unregister_codec(&wm8974->codec); 736 kfree(wm8974); 737 wm8974_codec = NULL; 738 } 739 740 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c, 741 const struct i2c_device_id *id) 742 { 743 struct wm8974_priv *wm8974; 744 struct snd_soc_codec *codec; 745 746 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL); 747 if (wm8974 == NULL) 748 return -ENOMEM; 749 750 codec = &wm8974->codec; 751 codec->hw_write = (hw_write_t)i2c_master_send; 752 753 i2c_set_clientdata(i2c, wm8974); 754 codec->control_data = i2c; 755 756 codec->dev = &i2c->dev; 757 758 return wm8974_register(wm8974); 759 } 760 761 static __devexit int wm8974_i2c_remove(struct i2c_client *client) 762 { 763 struct wm8974_priv *wm8974 = i2c_get_clientdata(client); 764 wm8974_unregister(wm8974); 765 return 0; 766 } 767 768 static const struct i2c_device_id wm8974_i2c_id[] = { 769 { "wm8974", 0 }, 770 { } 771 }; 772 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); 773 774 static struct i2c_driver wm8974_i2c_driver = { 775 .driver = { 776 .name = "WM8974", 777 .owner = THIS_MODULE, 778 }, 779 .probe = wm8974_i2c_probe, 780 .remove = __devexit_p(wm8974_i2c_remove), 781 .id_table = wm8974_i2c_id, 782 }; 783 784 static int __init wm8974_modinit(void) 785 { 786 return i2c_add_driver(&wm8974_i2c_driver); 787 } 788 module_init(wm8974_modinit); 789 790 static void __exit wm8974_exit(void) 791 { 792 i2c_del_driver(&wm8974_i2c_driver); 793 } 794 module_exit(wm8974_exit); 795 796 MODULE_DESCRIPTION("ASoC WM8974 driver"); 797 MODULE_AUTHOR("Liam Girdwood"); 798 MODULE_LICENSE("GPL"); 799