sound/soc/codecs/stac9766.c

   1 /*
   2  * stac9766.c  --  ALSA SoC STAC9766 codec support
   3  *
   4  * Copyright 2009 Jon Smirl, Digispeaker
   5  * Author: Jon Smirl <jonsmirl@gmail.com>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  *  Features:-
  13  *
  14  *   o Support for AC97 Codec, S/PDIF
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/module.h>
  19 #include <linux/device.h>
  20 #include <sound/core.h>
  21 #include <sound/pcm.h>
  22 #include <sound/ac97_codec.h>
  23 #include <sound/initval.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/tlv.h>
  27 #include <sound/soc-of-simple.h>
  28
  29 #include "stac9766.h"
  30
  31 #define STAC9766_VERSION "0.10"
  32
  33 /*
  34  * STAC9766 register cache
  35  */
  36 static const u16 stac9766_reg[] = {
  37         0x6A90, 0x8000, 0x8000, 0x8000, /* 6 */
  38         0x0000, 0x0000, 0x8008, 0x8008, /* e */
  39         0x8808, 0x8808, 0x8808, 0x8808, /* 16 */
  40         0x8808, 0x0000, 0x8000, 0x0000, /* 1e */
  41         0x0000, 0x0000, 0x0000, 0x000f, /* 26 */
  42         0x0a05, 0x0400, 0xbb80, 0x0000, /* 2e */
  43         0x0000, 0xbb80, 0x0000, 0x0000, /* 36 */
  44         0x0000, 0x2000, 0x0000, 0x0100, /* 3e */
  45         0x0000, 0x0000, 0x0080, 0x0000, /* 46 */
  46         0x0000, 0x0000, 0x0003, 0xffff, /* 4e */
  47         0x0000, 0x0000, 0x0000, 0x0000, /* 56 */
  48         0x4000, 0x0000, 0x0000, 0x0000, /* 5e */
  49         0x1201, 0xFFFF, 0xFFFF, 0x0000, /* 66 */
  50         0x0000, 0x0000, 0x0000, 0x0000, /* 6e */
  51         0x0000, 0x0000, 0x0000, 0x0006, /* 76 */
  52         0x0000, 0x0000, 0x0000, 0x0000, /* 7e */
  53 };
  54
  55 static const char *stac9766_record_mux[] = {"Mic", "CD", "Video", "AUX",
  56                         "Line", "Stereo Mix", "Mono Mix", "Phone"};
  57 static const char *stac9766_mono_mux[] = {"Mix", "Mic"};
  58 static const char *stac9766_mic_mux[] = {"Mic1", "Mic2"};
  59 static const char *stac9766_SPDIF_mux[] = {"PCM", "ADC Record"};
  60 static const char *stac9766_popbypass_mux[] = {"Normal", "Bypass Mixer"};
  61 static const char *stac9766_record_all_mux[] = {"All analog",
  62         "Analog plus DAC"};
  63 static const char *stac9766_boost1[] = {"0dB", "10dB"};
  64 static const char *stac9766_boost2[] = {"0dB", "20dB"};
  65 static const char *stac9766_stereo_mic[] = {"Off", "On"};
  66
  67 static const struct soc_enum stac9766_record_enum =
  68         SOC_ENUM_DOUBLE(AC97_REC_SEL, 8, 0, 8, stac9766_record_mux);
  69 static const struct soc_enum stac9766_mono_enum =
  70         SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 9, 2, stac9766_mono_mux);
  71 static const struct soc_enum stac9766_mic_enum =
  72         SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 8, 2, stac9766_mic_mux);
  73 static const struct soc_enum stac9766_SPDIF_enum =
  74         SOC_ENUM_SINGLE(AC97_STAC_DA_CONTROL, 1, 2, stac9766_SPDIF_mux);
  75 static const struct soc_enum stac9766_popbypass_enum =
  76         SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 15, 2, stac9766_popbypass_mux);
  77 static const struct soc_enum stac9766_record_all_enum =
  78         SOC_ENUM_SINGLE(AC97_STAC_ANALOG_SPECIAL, 12, 2,
  79                         stac9766_record_all_mux);
  80 static const struct soc_enum stac9766_boost1_enum =
  81         SOC_ENUM_SINGLE(AC97_MIC, 6, 2, stac9766_boost1); /* 0/10dB */
  82 static const struct soc_enum stac9766_boost2_enum =
  83         SOC_ENUM_SINGLE(AC97_STAC_ANALOG_SPECIAL, 2, 2, stac9766_boost2); /* 0/20dB */
  84 static const struct soc_enum stac9766_stereo_mic_enum =
  85         SOC_ENUM_SINGLE(AC97_STAC_STEREO_MIC, 2, 1, stac9766_stereo_mic);
  86
  87 static const DECLARE_TLV_DB_LINEAR(master_tlv, -4600, 0);
  88 static const DECLARE_TLV_DB_LINEAR(record_tlv, 0, 2250);
  89 static const DECLARE_TLV_DB_LINEAR(beep_tlv, -4500, 0);
  90 static const DECLARE_TLV_DB_LINEAR(mix_tlv, -3450, 1200);
  91
  92 static const struct snd_kcontrol_new stac9766_snd_ac97_controls[] = {
  93         SOC_DOUBLE_TLV("Speaker Volume", AC97_MASTER, 8, 0, 31, 1, master_tlv),
  94         SOC_SINGLE("Speaker Switch", AC97_MASTER, 15, 1, 1),
  95         SOC_DOUBLE_TLV("Headphone Volume", AC97_HEADPHONE, 8, 0, 31, 1,
  96                        master_tlv),
  97         SOC_SINGLE("Headphone Switch", AC97_HEADPHONE, 15, 1, 1),
  98         SOC_SINGLE_TLV("Mono Out Volume", AC97_MASTER_MONO, 0, 31, 1,
  99                        master_tlv),
 100         SOC_SINGLE("Mono Out Switch", AC97_MASTER_MONO, 15, 1, 1),
 101
 102         SOC_DOUBLE_TLV("Record Volume", AC97_REC_GAIN, 8, 0, 15, 0, record_tlv),
 103         SOC_SINGLE("Record Switch", AC97_REC_GAIN, 15, 1, 1),
 104
 105
 106         SOC_SINGLE_TLV("Beep Volume", AC97_PC_BEEP, 1, 15, 1, beep_tlv),
 107         SOC_SINGLE("Beep Switch", AC97_PC_BEEP, 15, 1, 1),
 108         SOC_SINGLE("Beep Frequency", AC97_PC_BEEP, 5, 127, 1),
 109         SOC_SINGLE_TLV("Phone Volume", AC97_PHONE, 0, 31, 1, mix_tlv),
 110         SOC_SINGLE("Phone Switch", AC97_PHONE, 15, 1, 1),
 111
 112         SOC_ENUM("Mic Boost1", stac9766_boost1_enum),
 113         SOC_ENUM("Mic Boost2", stac9766_boost2_enum),
 114         SOC_SINGLE_TLV("Mic Volume", AC97_MIC, 0, 31, 1, mix_tlv),
 115         SOC_SINGLE("Mic Switch", AC97_MIC, 15, 1, 1),
 116         SOC_ENUM("Stereo Mic", stac9766_stereo_mic_enum),
 117
 118         SOC_DOUBLE_TLV("Line Volume", AC97_LINE, 8, 0, 31, 1, mix_tlv),
 119         SOC_SINGLE("Line Switch", AC97_LINE, 15, 1, 1),
 120         SOC_DOUBLE_TLV("CD Volume", AC97_CD, 8, 0, 31, 1, mix_tlv),
 121         SOC_SINGLE("CD Switch", AC97_CD, 15, 1, 1),
 122         SOC_DOUBLE_TLV("AUX Volume", AC97_AUX, 8, 0, 31, 1, mix_tlv),
 123         SOC_SINGLE("AUX Switch", AC97_AUX, 15, 1, 1),
 124         SOC_DOUBLE_TLV("Video Volume", AC97_VIDEO, 8, 0, 31, 1, mix_tlv),
 125         SOC_SINGLE("Video Switch", AC97_VIDEO, 15, 1, 1),
 126
 127         SOC_DOUBLE_TLV("DAC Volume", AC97_PCM, 8, 0, 31, 1, mix_tlv),
 128         SOC_SINGLE("DAC Switch", AC97_PCM, 15, 1, 1),
 129         SOC_SINGLE("Loopback Test Switch", AC97_GENERAL_PURPOSE, 7, 1, 0),
 130         SOC_SINGLE("3D Volume", AC97_3D_CONTROL, 3, 2, 1),
 131         SOC_SINGLE("3D Switch", AC97_GENERAL_PURPOSE, 13, 1, 0),
 132
 133         SOC_ENUM("SPDIF Mux", stac9766_SPDIF_enum),
 134         SOC_ENUM("Mic1/2 Mux", stac9766_mic_enum),
 135         SOC_ENUM("Record All Mux", stac9766_record_all_enum),
 136         SOC_ENUM("Record Mux", stac9766_record_enum),
 137         SOC_ENUM("Mono Mux", stac9766_mono_enum),
 138         SOC_ENUM("Pop Bypass Mux", stac9766_popbypass_enum),
 139 };
 140
 141 static int stac9766_ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 142                                unsigned int val)
 143 {
 144         u16 *cache = codec->reg_cache;
 145
 146         if (reg > AC97_STAC_PAGE0) {
 147                 stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
 148                 soc_ac97_ops.write(codec->ac97, reg, val);
 149                 stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
 150                 return 0;
 151         }
 152         if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
 153                 return -EIO;
 154
 155         soc_ac97_ops.write(codec->ac97, reg, val);
 156         cache[reg / 2] = val;
 157         return 0;
 158 }
 159
 160 static unsigned int stac9766_ac97_read(struct snd_soc_codec *codec,
 161                                        unsigned int reg)
 162 {
 163         u16 val = 0, *cache = codec->reg_cache;
 164
 165         if (reg > AC97_STAC_PAGE0) {
 166                 stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
 167                 val = soc_ac97_ops.read(codec->ac97, reg - AC97_STAC_PAGE0);
 168                 stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
 169                 return val;
 170         }
 171         if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
 172                 return -EIO;
 173
 174         if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
 175                 reg == AC97_INT_PAGING || reg == AC97_VENDOR_ID1 ||
 176                 reg == AC97_VENDOR_ID2) {
 177
 178                 val = soc_ac97_ops.read(codec->ac97, reg);
 179                 return val;
 180         }
 181         return cache[reg / 2];
 182 }
 183
 184 static int ac97_analog_prepare(struct snd_pcm_substream *substream,
 185                                struct snd_soc_dai *dai)
 186 {
 187         struct snd_soc_codec *codec = dai->codec;
 188         struct snd_pcm_runtime *runtime = substream->runtime;
 189         unsigned short reg, vra;
 190
 191         vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
 192
 193         vra |= 0x1; /* enable variable rate audio */
 194
 195         stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
 196
 197         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 198                 reg = AC97_PCM_FRONT_DAC_RATE;
 199         else
 200                 reg = AC97_PCM_LR_ADC_RATE;
 201
 202         return stac9766_ac97_write(codec, reg, runtime->rate);
 203 }
 204
 205 static int ac97_digital_prepare(struct snd_pcm_substream *substream,
 206                                 struct snd_soc_dai *dai)
 207 {
 208         struct snd_soc_codec *codec = dai->codec;
 209         struct snd_pcm_runtime *runtime = substream->runtime;
 210         unsigned short reg, vra;
 211
 212         stac9766_ac97_write(codec, AC97_SPDIF, 0x2002);
 213
 214         vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
 215         vra |= 0x5; /* Enable VRA and SPDIF out */
 216
 217         stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
 218
 219         reg = AC97_PCM_FRONT_DAC_RATE;
 220
 221         return stac9766_ac97_write(codec, reg, runtime->rate);
 222 }
 223
 224 static int ac97_digital_trigger(struct snd_pcm_substream *substream,
 225                                 int cmd, struct snd_soc_dai *dai)
 226 {
 227         struct snd_soc_codec *codec = dai->codec;
 228         unsigned short vra;
 229
 230         switch (cmd) {
 231         case SNDRV_PCM_TRIGGER_STOP:
 232                 vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
 233                 vra &= !0x04;
 234                 stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
 235                 break;
 236         }
 237         return 0;
 238 }
 239
 240 static int stac9766_set_bias_level(struct snd_soc_codec *codec,
 241                                    enum snd_soc_bias_level level)
 242 {
 243         switch (level) {
 244         case SND_SOC_BIAS_ON: /* full On */
 245         case SND_SOC_BIAS_PREPARE: /* partial On */
 246         case SND_SOC_BIAS_STANDBY: /* Off, with power */
 247                 stac9766_ac97_write(codec, AC97_POWERDOWN, 0x0000);
 248                 break;
 249         case SND_SOC_BIAS_OFF: /* Off, without power */
 250                 /* disable everything including AC link */
 251                 stac9766_ac97_write(codec, AC97_POWERDOWN, 0xffff);
 252                 break;
 253         }
 254         codec->bias_level = level;
 255         return 0;
 256 }
 257
 258 static int stac9766_reset(struct snd_soc_codec *codec, int try_warm)
 259 {
 260         if (try_warm && soc_ac97_ops.warm_reset) {
 261                 soc_ac97_ops.warm_reset(codec->ac97);
 262                 if (stac9766_ac97_read(codec, 0) == stac9766_reg[0])
 263                         return 1;
 264         }
 265
 266         soc_ac97_ops.reset(codec->ac97);
 267         if (soc_ac97_ops.warm_reset)
 268                 soc_ac97_ops.warm_reset(codec->ac97);
 269         if (stac9766_ac97_read(codec, 0) != stac9766_reg[0])
 270                 return -EIO;
 271         return 0;
 272 }
 273
 274 static int stac9766_codec_suspend(struct platform_device *pdev,
 275                                   pm_message_t state)
 276 {
 277         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 278         struct snd_soc_codec *codec = socdev->card->codec;
 279
 280         stac9766_set_bias_level(codec, SND_SOC_BIAS_OFF);
 281         return 0;
 282 }
 283
 284 static int stac9766_codec_resume(struct platform_device *pdev)
 285 {
 286         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 287         struct snd_soc_codec *codec = socdev->card->codec;
 288         u16 id, reset;
 289
 290         reset = 0;
 291         /* give the codec an AC97 warm reset to start the link */
 292 reset:
 293         if (reset > 5) {
 294                 printk(KERN_ERR "stac9766 failed to resume");
 295                 return -EIO;
 296         }
 297         codec->ac97->bus->ops->warm_reset(codec->ac97);
 298         id = soc_ac97_ops.read(codec->ac97, AC97_VENDOR_ID2);
 299         if (id != 0x4c13) {
 300                 stac9766_reset(codec, 0);
 301                 reset++;
 302                 goto reset;
 303         }
 304         stac9766_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 305
 306         if (codec->suspend_bias_level == SND_SOC_BIAS_ON)
 307                 stac9766_set_bias_level(codec, SND_SOC_BIAS_ON);
 308
 309         return 0;
 310 }
 311
 312 static struct snd_soc_dai_ops stac9766_dai_ops_analog = {
 313         .prepare = ac97_analog_prepare,
 314 };
 315
 316 static struct snd_soc_dai_ops stac9766_dai_ops_digital = {
 317         .prepare = ac97_digital_prepare,
 318         .trigger = ac97_digital_trigger,
 319 };
 320
 321 struct snd_soc_dai stac9766_dai[] = {
 322 {
 323         .name = "stac9766 analog",
 324         .id = 0,
 325         .ac97_control = 1,
 326
 327         /* stream cababilities */
 328         .playback = {
 329                 .stream_name = "stac9766 analog",
 330                 .channels_min = 1,
 331                 .channels_max = 2,
 332                 .rates = SNDRV_PCM_RATE_8000_48000,
 333                 .formats = SND_SOC_STD_AC97_FMTS,
 334         },
 335         .capture = {
 336                 .stream_name = "stac9766 analog",
 337                 .channels_min = 1,
 338                 .channels_max = 2,
 339                 .rates = SNDRV_PCM_RATE_8000_48000,
 340                 .formats = SND_SOC_STD_AC97_FMTS,
 341         },
 342         /* alsa ops */
 343         .ops = &stac9766_dai_ops_analog,
 344 },
 345 {
 346         .name = "stac9766 IEC958",
 347         .id = 1,
 348         .ac97_control = 1,
 349
 350         /* stream cababilities */
 351         .playback = {
 352                 .stream_name = "stac9766 IEC958",
 353                 .channels_min = 1,
 354                 .channels_max = 2,
 355                 .rates = SNDRV_PCM_RATE_32000 | \
 356                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
 357                 .formats = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,
 358         },
 359         /* alsa ops */
 360         .ops = &stac9766_dai_ops_digital,
 361 }
 362 };
 363 EXPORT_SYMBOL_GPL(stac9766_dai);
 364
 365 static int stac9766_codec_probe(struct platform_device *pdev)
 366 {
 367         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 368         struct snd_soc_codec *codec;
 369         int ret = 0;
 370
 371         printk(KERN_INFO "STAC9766 SoC Audio Codec %s\n", STAC9766_VERSION);
 372
 373         socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 374         if (socdev->card->codec == NULL)
 375                 return -ENOMEM;
 376         codec = socdev->card->codec;
 377         mutex_init(&codec->mutex);
 378
 379         codec->reg_cache = kmemdup(stac9766_reg, sizeof(stac9766_reg),
 380                                    GFP_KERNEL);
 381         if (codec->reg_cache == NULL) {
 382                 ret = -ENOMEM;
 383                 goto cache_err;
 384         }
 385         codec->reg_cache_size = sizeof(stac9766_reg);
 386         codec->reg_cache_step = 2;
 387
 388         codec->name = "STAC9766";
 389         codec->owner = THIS_MODULE;
 390         codec->dai = stac9766_dai;
 391         codec->num_dai = ARRAY_SIZE(stac9766_dai);
 392         codec->write = stac9766_ac97_write;
 393         codec->read = stac9766_ac97_read;
 394         codec->set_bias_level = stac9766_set_bias_level;
 395         INIT_LIST_HEAD(&codec->dapm_widgets);
 396         INIT_LIST_HEAD(&codec->dapm_paths);
 397
 398         ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
 399         if (ret < 0)
 400                 goto codec_err;
 401
 402         /* register pcms */
 403         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 404         if (ret < 0)
 405                 goto pcm_err;
 406
 407         /* do a cold reset for the controller and then try
 408          * a warm reset followed by an optional cold reset for codec */
 409         stac9766_reset(codec, 0);
 410         ret = stac9766_reset(codec, 1);
 411         if (ret < 0) {
 412                 printk(KERN_ERR "Failed to reset STAC9766: AC97 link error\n");
 413                 goto reset_err;
 414         }
 415
 416         stac9766_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 417
 418         snd_soc_add_controls(codec, stac9766_snd_ac97_controls,
 419                              ARRAY_SIZE(stac9766_snd_ac97_controls));
 420
 421         return 0;
 422
 423 reset_err:
 424         snd_soc_free_pcms(socdev);
 425 pcm_err:
 426         snd_soc_free_ac97_codec(codec);
 427 codec_err:
 428         kfree(codec->private_data);
 429 cache_err:
 430         kfree(socdev->card->codec);
 431         socdev->card->codec = NULL;
 432         return ret;
 433 }
 434
 435 static int stac9766_codec_remove(struct platform_device *pdev)
 436 {
 437         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 438         struct snd_soc_codec *codec = socdev->card->codec;
 439
 440         if (codec == NULL)
 441                 return 0;
 442
 443         snd_soc_free_pcms(socdev);
 444         snd_soc_free_ac97_codec(codec);
 445         kfree(codec->reg_cache);
 446         kfree(codec);
 447         return 0;
 448 }
 449
 450 struct snd_soc_codec_device soc_codec_dev_stac9766 = {
 451         .probe = stac9766_codec_probe,
 452         .remove = stac9766_codec_remove,
 453         .suspend = stac9766_codec_suspend,
 454         .resume = stac9766_codec_resume,
 455 };
 456 EXPORT_SYMBOL_GPL(soc_codec_dev_stac9766);
 457
 458 MODULE_DESCRIPTION("ASoC stac9766 driver");
 459 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
 460 MODULE_LICENSE("GPL");