sound/soc/codecs/wm8974.c

   1 /*
   2  * wm8974.c  --  WM8974 ALSA Soc Audio driver
   3  *
   4  * Copyright 2006-2009 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Liam Girdwood <linux@wolfsonmicro.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/delay.h>
  18 #include <linux/pm.h>
  19 #include <linux/i2c.h>
  20 #include <linux/platform_device.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/soc.h>
  25 #include <sound/soc-dapm.h>
  26 #include <sound/initval.h>
  27 #include <sound/tlv.h>
  28
  29 #include "wm8974.h"
  30
  31 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
  32         0x0000, 0x0000, 0x0000, 0x0000,
  33         0x0050, 0x0000, 0x0140, 0x0000,
  34         0x0000, 0x0000, 0x0000, 0x00ff,
  35         0x0000, 0x0000, 0x0100, 0x00ff,
  36         0x0000, 0x0000, 0x012c, 0x002c,
  37         0x002c, 0x002c, 0x002c, 0x0000,
  38         0x0032, 0x0000, 0x0000, 0x0000,
  39         0x0000, 0x0000, 0x0000, 0x0000,
  40         0x0038, 0x000b, 0x0032, 0x0000,
  41         0x0008, 0x000c, 0x0093, 0x00e9,
  42         0x0000, 0x0000, 0x0000, 0x0000,
  43         0x0003, 0x0010, 0x0000, 0x0000,
  44         0x0000, 0x0002, 0x0000, 0x0000,
  45         0x0000, 0x0000, 0x0039, 0x0000,
  46         0x0000,
  47 };
  48
  49 #define WM8974_POWER1_BIASEN  0x08
  50 #define WM8974_POWER1_BUFIOEN 0x10
  51
  52 struct wm8974_priv {
  53         struct snd_soc_codec codec;
  54         u16 reg_cache[WM8974_CACHEREGNUM];
  55 };
  56
  57 static struct snd_soc_codec *wm8974_codec;
  58
  59 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
  60
  61 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
  62 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
  63 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
  64 static const char *wm8974_bw[] = {"Narrow", "Wide" };
  65 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
  66 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
  67 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
  68 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
  69 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
  70 static const char *wm8974_alc[] = {"ALC", "Limiter" };
  71
  72 static const struct soc_enum wm8974_enum[] = {
  73         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
  74         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
  75         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
  76         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
  77
  78         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
  79         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
  80         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
  81         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
  82
  83         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
  84         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
  85         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
  86         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
  87
  88         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
  89         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
  90 };
  91
  92 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
  93
  94 static const struct soc_enum wm8974_auxmode =
  95         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
  96
  97 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
  98 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
  99 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
 100 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
 101
 102 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 103
 104 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 105
 106 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 107 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 108
 109 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 110 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 111
 112 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 113
 114 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 115 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 116 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 117
 118 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 119
 120 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 121 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 122 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 123
 124 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
 125 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 126 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 127
 128 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
 129 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 130 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 131
 132 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
 133 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 134 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 135
 136 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
 137 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 138 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 139
 140 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 141 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 142 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 143
 144 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 145 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 146
 147 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 148 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 149 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 150
 151 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 152 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 153 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 154
 155 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 156 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 157 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 158
 159 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 160 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 161
 162 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 163 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 164
 165 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 166 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 167 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 168
 169 SOC_ENUM("Aux Mode", wm8974_auxmode),
 170
 171 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 172 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 173 };
 174
 175 /* Speaker Output Mixer */
 176 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 177 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 178 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 179 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
 180 };
 181
 182 /* Mono Output Mixer */
 183 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 184 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 185 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 186 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 187 };
 188
 189 /* Boost mixer */
 190 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 191 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 192 };
 193
 194 /* Input PGA */
 195 static const struct snd_kcontrol_new wm8974_inpga[] = {
 196 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 197 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 198 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 199 };
 200
 201 /* AUX Input boost vol */
 202 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 203 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 204
 205 /* Mic Input boost vol */
 206 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 207 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 208
 209 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 210 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 211         &wm8974_speaker_mixer_controls[0],
 212         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 213 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 214         &wm8974_mono_mixer_controls[0],
 215         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 216 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 217 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 218 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 219 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 220 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 221 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 222
 223 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 224                    ARRAY_SIZE(wm8974_inpga)),
 225 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 226                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 227
 228 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
 229
 230 SND_SOC_DAPM_INPUT("MICN"),
 231 SND_SOC_DAPM_INPUT("MICP"),
 232 SND_SOC_DAPM_INPUT("AUX"),
 233 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 234 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 235 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 236 };
 237
 238 static const struct snd_soc_dapm_route audio_map[] = {
 239         /* Mono output mixer */
 240         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 241         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 242         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 243
 244         /* Speaker output mixer */
 245         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 246         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 247         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 248
 249         /* Outputs */
 250         {"Mono Out", NULL, "Mono Mixer"},
 251         {"MONOOUT", NULL, "Mono Out"},
 252         {"SpkN Out", NULL, "Speaker Mixer"},
 253         {"SpkP Out", NULL, "Speaker Mixer"},
 254         {"SPKOUTN", NULL, "SpkN Out"},
 255         {"SPKOUTP", NULL, "SpkP Out"},
 256
 257         /* Boost Mixer */
 258         {"ADC", NULL, "Boost Mixer"},
 259         {"Boost Mixer", "Aux Switch", "Aux Input"},
 260         {"Boost Mixer", NULL, "Input PGA"},
 261         {"Boost Mixer", NULL, "MICP"},
 262
 263         /* Input PGA */
 264         {"Input PGA", "Aux Switch", "Aux Input"},
 265         {"Input PGA", "MicN Switch", "MICN"},
 266         {"Input PGA", "MicP Switch", "MICP"},
 267
 268         /* Inputs */
 269         {"Aux Input", NULL, "AUX"},
 270 };
 271
 272 static int wm8974_add_widgets(struct snd_soc_codec *codec)
 273 {
 274         snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
 275                                   ARRAY_SIZE(wm8974_dapm_widgets));
 276
 277         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 278
 279         snd_soc_dapm_new_widgets(codec);
 280         return 0;
 281 }
 282
 283 struct pll_ {
 284         unsigned int pre_div:1;
 285         unsigned int n:4;
 286         unsigned int k;
 287 };
 288
 289 /* The size in bits of the pll divide multiplied by 10
 290  * to allow rounding later */
 291 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 292
 293 static void pll_factors(struct pll_ *pll_div,
 294                         unsigned int target, unsigned int source)
 295 {
 296         unsigned long long Kpart;
 297         unsigned int K, Ndiv, Nmod;
 298
 299         /* There is a fixed divide by 4 in the output path */
 300         target *= 4;
 301
 302         Ndiv = target / source;
 303         if (Ndiv < 6) {
 304                 source /= 2;
 305                 pll_div->pre_div = 1;
 306                 Ndiv = target / source;
 307         } else
 308                 pll_div->pre_div = 0;
 309
 310         if ((Ndiv < 6) || (Ndiv > 12))
 311                 printk(KERN_WARNING
 312                         "WM8974 N value %u outwith recommended range!\n",
 313                         Ndiv);
 314
 315         pll_div->n = Ndiv;
 316         Nmod = target % source;
 317         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 318
 319         do_div(Kpart, source);
 320
 321         K = Kpart & 0xFFFFFFFF;
 322
 323         /* Check if we need to round */
 324         if ((K % 10) >= 5)
 325                 K += 5;
 326
 327         /* Move down to proper range now rounding is done */
 328         K /= 10;
 329
 330         pll_div->k = K;
 331 }
 332
 333 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 334                 int source, unsigned int freq_in, unsigned int freq_out)
 335 {
 336         struct snd_soc_codec *codec = codec_dai->codec;
 337         struct pll_ pll_div;
 338         u16 reg;
 339
 340         if (freq_in == 0 || freq_out == 0) {
 341                 /* Clock CODEC directly from MCLK */
 342                 reg = snd_soc_read(codec, WM8974_CLOCK);
 343                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 344
 345                 /* Turn off PLL */
 346                 reg = snd_soc_read(codec, WM8974_POWER1);
 347                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
 348                 return 0;
 349         }
 350
 351         pll_factors(&pll_div, freq_out, freq_in);
 352
 353         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 354         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 355         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 356         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 357         reg = snd_soc_read(codec, WM8974_POWER1);
 358         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 359
 360         /* Run CODEC from PLL instead of MCLK */
 361         reg = snd_soc_read(codec, WM8974_CLOCK);
 362         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 363
 364         return 0;
 365 }
 366
 367 /*
 368  * Configure WM8974 clock dividers.
 369  */
 370 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 371                 int div_id, int div)
 372 {
 373         struct snd_soc_codec *codec = codec_dai->codec;
 374         u16 reg;
 375
 376         switch (div_id) {
 377         case WM8974_OPCLKDIV:
 378                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
 379                 snd_soc_write(codec, WM8974_GPIO, reg | div);
 380                 break;
 381         case WM8974_MCLKDIV:
 382                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 383                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 384                 break;
 385         case WM8974_ADCCLK:
 386                 reg = snd_soc_read(codec, WM8974_ADC) & 0x1f7;
 387                 snd_soc_write(codec, WM8974_ADC, reg | div);
 388                 break;
 389         case WM8974_DACCLK:
 390                 reg = snd_soc_read(codec, WM8974_DAC) & 0x1f7;
 391                 snd_soc_write(codec, WM8974_DAC, reg | div);
 392                 break;
 393         case WM8974_BCLKDIV:
 394                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 395                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 396                 break;
 397         default:
 398                 return -EINVAL;
 399         }
 400
 401         return 0;
 402 }
 403
 404 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 405                 unsigned int fmt)
 406 {
 407         struct snd_soc_codec *codec = codec_dai->codec;
 408         u16 iface = 0;
 409         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 410
 411         /* set master/slave audio interface */
 412         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 413         case SND_SOC_DAIFMT_CBM_CFM:
 414                 clk |= 0x0001;
 415                 break;
 416         case SND_SOC_DAIFMT_CBS_CFS:
 417                 break;
 418         default:
 419                 return -EINVAL;
 420         }
 421
 422         /* interface format */
 423         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 424         case SND_SOC_DAIFMT_I2S:
 425                 iface |= 0x0010;
 426                 break;
 427         case SND_SOC_DAIFMT_RIGHT_J:
 428                 break;
 429         case SND_SOC_DAIFMT_LEFT_J:
 430                 iface |= 0x0008;
 431                 break;
 432         case SND_SOC_DAIFMT_DSP_A:
 433                 iface |= 0x00018;
 434                 break;
 435         default:
 436                 return -EINVAL;
 437         }
 438
 439         /* clock inversion */
 440         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 441         case SND_SOC_DAIFMT_NB_NF:
 442                 break;
 443         case SND_SOC_DAIFMT_IB_IF:
 444                 iface |= 0x0180;
 445                 break;
 446         case SND_SOC_DAIFMT_IB_NF:
 447                 iface |= 0x0100;
 448                 break;
 449         case SND_SOC_DAIFMT_NB_IF:
 450                 iface |= 0x0080;
 451                 break;
 452         default:
 453                 return -EINVAL;
 454         }
 455
 456         snd_soc_write(codec, WM8974_IFACE, iface);
 457         snd_soc_write(codec, WM8974_CLOCK, clk);
 458         return 0;
 459 }
 460
 461 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 462                                 struct snd_pcm_hw_params *params,
 463                                 struct snd_soc_dai *dai)
 464 {
 465         struct snd_soc_codec *codec = dai->codec;
 466         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
 467         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 468
 469         /* bit size */
 470         switch (params_format(params)) {
 471         case SNDRV_PCM_FORMAT_S16_LE:
 472                 break;
 473         case SNDRV_PCM_FORMAT_S20_3LE:
 474                 iface |= 0x0020;
 475                 break;
 476         case SNDRV_PCM_FORMAT_S24_LE:
 477                 iface |= 0x0040;
 478                 break;
 479         case SNDRV_PCM_FORMAT_S32_LE:
 480                 iface |= 0x0060;
 481                 break;
 482         }
 483
 484         /* filter coefficient */
 485         switch (params_rate(params)) {
 486         case SNDRV_PCM_RATE_8000:
 487                 adn |= 0x5 << 1;
 488                 break;
 489         case SNDRV_PCM_RATE_11025:
 490                 adn |= 0x4 << 1;
 491                 break;
 492         case SNDRV_PCM_RATE_16000:
 493                 adn |= 0x3 << 1;
 494                 break;
 495         case SNDRV_PCM_RATE_22050:
 496                 adn |= 0x2 << 1;
 497                 break;
 498         case SNDRV_PCM_RATE_32000:
 499                 adn |= 0x1 << 1;
 500                 break;
 501         case SNDRV_PCM_RATE_44100:
 502         case SNDRV_PCM_RATE_48000:
 503                 break;
 504         }
 505
 506         snd_soc_write(codec, WM8974_IFACE, iface);
 507         snd_soc_write(codec, WM8974_ADD, adn);
 508         return 0;
 509 }
 510
 511 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 512 {
 513         struct snd_soc_codec *codec = dai->codec;
 514         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 515
 516         if (mute)
 517                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 518         else
 519                 snd_soc_write(codec, WM8974_DAC, mute_reg);
 520         return 0;
 521 }
 522
 523 /* liam need to make this lower power with dapm */
 524 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 525         enum snd_soc_bias_level level)
 526 {
 527         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 528
 529         switch (level) {
 530         case SND_SOC_BIAS_ON:
 531         case SND_SOC_BIAS_PREPARE:
 532                 power1 |= 0x1;  /* VMID 50k */
 533                 snd_soc_write(codec, WM8974_POWER1, power1);
 534                 break;
 535
 536         case SND_SOC_BIAS_STANDBY:
 537                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 538
 539                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 540                         /* Initial cap charge at VMID 5k */
 541                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
 542                         mdelay(100);
 543                 }
 544
 545                 power1 |= 0x2;  /* VMID 500k */
 546                 snd_soc_write(codec, WM8974_POWER1, power1);
 547                 break;
 548
 549         case SND_SOC_BIAS_OFF:
 550                 snd_soc_write(codec, WM8974_POWER1, 0);
 551                 snd_soc_write(codec, WM8974_POWER2, 0);
 552                 snd_soc_write(codec, WM8974_POWER3, 0);
 553                 break;
 554         }
 555
 556         codec->bias_level = level;
 557         return 0;
 558 }
 559
 560 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 561
 562 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 563         SNDRV_PCM_FMTBIT_S24_LE)
 564
 565 static struct snd_soc_dai_ops wm8974_ops = {
 566         .hw_params = wm8974_pcm_hw_params,
 567         .digital_mute = wm8974_mute,
 568         .set_fmt = wm8974_set_dai_fmt,
 569         .set_clkdiv = wm8974_set_dai_clkdiv,
 570         .set_pll = wm8974_set_dai_pll,
 571 };
 572
 573 struct snd_soc_dai wm8974_dai = {
 574         .name = "WM8974 HiFi",
 575         .playback = {
 576                 .stream_name = "Playback",
 577                 .channels_min = 1,
 578                 .channels_max = 2,   /* Only 1 channel of data */
 579                 .rates = WM8974_RATES,
 580                 .formats = WM8974_FORMATS,},
 581         .capture = {
 582                 .stream_name = "Capture",
 583                 .channels_min = 1,
 584                 .channels_max = 2,   /* Only 1 channel of data */
 585                 .rates = WM8974_RATES,
 586                 .formats = WM8974_FORMATS,},
 587         .ops = &wm8974_ops,
 588         .symmetric_rates = 1,
 589 };
 590 EXPORT_SYMBOL_GPL(wm8974_dai);
 591
 592 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
 593 {
 594         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 595         struct snd_soc_codec *codec = socdev->card->codec;
 596
 597         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 598         return 0;
 599 }
 600
 601 static int wm8974_resume(struct platform_device *pdev)
 602 {
 603         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 604         struct snd_soc_codec *codec = socdev->card->codec;
 605         int i;
 606         u8 data[2];
 607         u16 *cache = codec->reg_cache;
 608
 609         /* Sync reg_cache with the hardware */
 610         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
 611                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 612                 data[1] = cache[i] & 0x00ff;
 613                 codec->hw_write(codec->control_data, data, 2);
 614         }
 615         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 616         wm8974_set_bias_level(codec, codec->suspend_bias_level);
 617         return 0;
 618 }
 619
 620 static int wm8974_probe(struct platform_device *pdev)
 621 {
 622         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 623         struct snd_soc_codec *codec;
 624         int ret = 0;
 625
 626         if (wm8974_codec == NULL) {
 627                 dev_err(&pdev->dev, "Codec device not registered\n");
 628                 return -ENODEV;
 629         }
 630
 631         socdev->card->codec = wm8974_codec;
 632         codec = wm8974_codec;
 633
 634         /* register pcms */
 635         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 636         if (ret < 0) {
 637                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 638                 goto pcm_err;
 639         }
 640
 641         snd_soc_add_controls(codec, wm8974_snd_controls,
 642                              ARRAY_SIZE(wm8974_snd_controls));
 643         wm8974_add_widgets(codec);
 644
 645         return ret;
 646
 647 pcm_err:
 648         return ret;
 649 }
 650
 651 /* power down chip */
 652 static int wm8974_remove(struct platform_device *pdev)
 653 {
 654         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 655
 656         snd_soc_free_pcms(socdev);
 657         snd_soc_dapm_free(socdev);
 658
 659         return 0;
 660 }
 661
 662 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
 663         .probe =        wm8974_probe,
 664         .remove =       wm8974_remove,
 665         .suspend =      wm8974_suspend,
 666         .resume =       wm8974_resume,
 667 };
 668 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
 669
 670 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
 671 {
 672         int ret;
 673         struct snd_soc_codec *codec = &wm8974->codec;
 674
 675         if (wm8974_codec) {
 676                 dev_err(codec->dev, "Another WM8974 is registered\n");
 677                 return -EINVAL;
 678         }
 679
 680         mutex_init(&codec->mutex);
 681         INIT_LIST_HEAD(&codec->dapm_widgets);
 682         INIT_LIST_HEAD(&codec->dapm_paths);
 683
 684         codec->private_data = wm8974;
 685         codec->name = "WM8974";
 686         codec->owner = THIS_MODULE;
 687         codec->bias_level = SND_SOC_BIAS_OFF;
 688         codec->set_bias_level = wm8974_set_bias_level;
 689         codec->dai = &wm8974_dai;
 690         codec->num_dai = 1;
 691         codec->reg_cache_size = WM8974_CACHEREGNUM;
 692         codec->reg_cache = &wm8974->reg_cache;
 693
 694         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
 695         if (ret < 0) {
 696                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 697                 goto err;
 698         }
 699
 700         memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
 701
 702         ret = wm8974_reset(codec);
 703         if (ret < 0) {
 704                 dev_err(codec->dev, "Failed to issue reset\n");
 705                 goto err;
 706         }
 707
 708         wm8974_dai.dev = codec->dev;
 709
 710         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 711
 712         wm8974_codec = codec;
 713
 714         ret = snd_soc_register_codec(codec);
 715         if (ret != 0) {
 716                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 717                 goto err;
 718         }
 719
 720         ret = snd_soc_register_dai(&wm8974_dai);
 721         if (ret != 0) {
 722                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 723                 goto err_codec;
 724         }
 725
 726         return 0;
 727
 728 err_codec:
 729         snd_soc_unregister_codec(codec);
 730 err:
 731         kfree(wm8974);
 732         return ret;
 733 }
 734
 735 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
 736 {
 737         wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
 738         snd_soc_unregister_dai(&wm8974_dai);
 739         snd_soc_unregister_codec(&wm8974->codec);
 740         kfree(wm8974);
 741         wm8974_codec = NULL;
 742 }
 743
 744 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
 745                                       const struct i2c_device_id *id)
 746 {
 747         struct wm8974_priv *wm8974;
 748         struct snd_soc_codec *codec;
 749
 750         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
 751         if (wm8974 == NULL)
 752                 return -ENOMEM;
 753
 754         codec = &wm8974->codec;
 755         codec->hw_write = (hw_write_t)i2c_master_send;
 756
 757         i2c_set_clientdata(i2c, wm8974);
 758         codec->control_data = i2c;
 759
 760         codec->dev = &i2c->dev;
 761
 762         return wm8974_register(wm8974);
 763 }
 764
 765 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
 766 {
 767         struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
 768         wm8974_unregister(wm8974);
 769         return 0;
 770 }
 771
 772 static const struct i2c_device_id wm8974_i2c_id[] = {
 773         { "wm8974", 0 },
 774         { }
 775 };
 776 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 777
 778 static struct i2c_driver wm8974_i2c_driver = {
 779         .driver = {
 780                 .name = "WM8974",
 781                 .owner = THIS_MODULE,
 782         },
 783         .probe =    wm8974_i2c_probe,
 784         .remove =   __devexit_p(wm8974_i2c_remove),
 785         .id_table = wm8974_i2c_id,
 786 };
 787
 788 static int __init wm8974_modinit(void)
 789 {
 790         return i2c_add_driver(&wm8974_i2c_driver);
 791 }
 792 module_init(wm8974_modinit);
 793
 794 static void __exit wm8974_exit(void)
 795 {
 796         i2c_del_driver(&wm8974_i2c_driver);
 797 }
 798 module_exit(wm8974_exit);
 799
 800 MODULE_DESCRIPTION("ASoC WM8974 driver");
 801 MODULE_AUTHOR("Liam Girdwood");
 802 MODULE_LICENSE("GPL");