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/slab.h>
  19 #include <linux/module.h>
  20 #include <linux/device.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/ac97_codec.h>
  24 #include <sound/initval.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/tlv.h>
  28 #include <sound/soc-of-simple.h>
  29
  30 #include "stac9766.h"
  31
  32 #define STAC9766_VERSION "0.10"
  33
  34 /*
  35  * STAC9766 register cache
  36  */
  37 static const u16 stac9766_reg[] = {
  38         0x6A90, 0x8000, 0x8000, 0x8000, /* 6 */
  39         0x0000, 0x0000, 0x8008, 0x8008, /* e */
  40         0x8808, 0x8808, 0x8808, 0x8808, /* 16 */
  41         0x8808, 0x0000, 0x8000, 0x0000, /* 1e */
  42         0x0000, 0x0000, 0x0000, 0x000f, /* 26 */
  43         0x0a05, 0x0400, 0xbb80, 0x0000, /* 2e */
  44         0x0000, 0xbb80, 0x0000, 0x0000, /* 36 */
  45         0x0000, 0x2000, 0x0000, 0x0100, /* 3e */
  46         0x0000, 0x0000, 0x0080, 0x0000, /* 46 */
  47         0x0000, 0x0000, 0x0003, 0xffff, /* 4e */
  48         0x0000, 0x0000, 0x0000, 0x0000, /* 56 */
  49         0x4000, 0x0000, 0x0000, 0x0000, /* 5e */
  50         0x1201, 0xFFFF, 0xFFFF, 0x0000, /* 66 */
  51         0x0000, 0x0000, 0x0000, 0x0000, /* 6e */
  52         0x0000, 0x0000, 0x0000, 0x0006, /* 76 */
  53         0x0000, 0x0000, 0x0000, 0x0000, /* 7e */
  54 };
  55
  56 static const char *stac9766_record_mux[] = {"Mic", "CD", "Video", "AUX",
  57                         "Line", "Stereo Mix", "Mono Mix", "Phone"};
  58 static const char *stac9766_mono_mux[] = {"Mix", "Mic"};
  59 static const char *stac9766_mic_mux[] = {"Mic1", "Mic2"};
  60 static const char *stac9766_SPDIF_mux[] = {"PCM", "ADC Record"};
  61 static const char *stac9766_popbypass_mux[] = {"Normal", "Bypass Mixer"};
  62 static const char *stac9766_record_all_mux[] = {"All analog",
  63         "Analog plus DAC"};
  64 static const char *stac9766_boost1[] = {"0dB", "10dB"};
  65 static const char *stac9766_boost2[] = {"0dB", "20dB"};
  66 static const char *stac9766_stereo_mic[] = {"Off", "On"};
  67
  68 static const struct soc_enum stac9766_record_enum =
  69         SOC_ENUM_DOUBLE(AC97_REC_SEL, 8, 0, 8, stac9766_record_mux);
  70 static const struct soc_enum stac9766_mono_enum =
  71         SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 9, 2, stac9766_mono_mux);
  72 static const struct soc_enum stac9766_mic_enum =
  73         SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 8, 2, stac9766_mic_mux);
  74 static const struct soc_enum stac9766_SPDIF_enum =
  75         SOC_ENUM_SINGLE(AC97_STAC_DA_CONTROL, 1, 2, stac9766_SPDIF_mux);
  76 static const struct soc_enum stac9766_popbypass_enum =
  77         SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 15, 2, stac9766_popbypass_mux);
  78 static const struct soc_enum stac9766_record_all_enum =
  79         SOC_ENUM_SINGLE(AC97_STAC_ANALOG_SPECIAL, 12, 2,
  80                         stac9766_record_all_mux);
  81 static const struct soc_enum stac9766_boost1_enum =
  82         SOC_ENUM_SINGLE(AC97_MIC, 6, 2, stac9766_boost1); /* 0/10dB */
  83 static const struct soc_enum stac9766_boost2_enum =
  84         SOC_ENUM_SINGLE(AC97_STAC_ANALOG_SPECIAL, 2, 2, stac9766_boost2); /* 0/20dB */
  85 static const struct soc_enum stac9766_stereo_mic_enum =
  86         SOC_ENUM_SINGLE(AC97_STAC_STEREO_MIC, 2, 1, stac9766_stereo_mic);
  87
  88 static const DECLARE_TLV_DB_LINEAR(master_tlv, -4600, 0);
  89 static const DECLARE_TLV_DB_LINEAR(record_tlv, 0, 2250);
  90 static const DECLARE_TLV_DB_LINEAR(beep_tlv, -4500, 0);
  91 static const DECLARE_TLV_DB_LINEAR(mix_tlv, -3450, 1200);
  92
  93 static const struct snd_kcontrol_new stac9766_snd_ac97_controls[] = {
  94         SOC_DOUBLE_TLV("Speaker Volume", AC97_MASTER, 8, 0, 31, 1, master_tlv),
  95         SOC_SINGLE("Speaker Switch", AC97_MASTER, 15, 1, 1),
  96         SOC_DOUBLE_TLV("Headphone Volume", AC97_HEADPHONE, 8, 0, 31, 1,
  97                        master_tlv),
  98         SOC_SINGLE("Headphone Switch", AC97_HEADPHONE, 15, 1, 1),
  99         SOC_SINGLE_TLV("Mono Out Volume", AC97_MASTER_MONO, 0, 31, 1,
 100                        master_tlv),
 101         SOC_SINGLE("Mono Out Switch", AC97_MASTER_MONO, 15, 1, 1),
 102
 103         SOC_DOUBLE_TLV("Record Volume", AC97_REC_GAIN, 8, 0, 15, 0, record_tlv),
 104         SOC_SINGLE("Record Switch", AC97_REC_GAIN, 15, 1, 1),
 105
 106
 107         SOC_SINGLE_TLV("Beep Volume", AC97_PC_BEEP, 1, 15, 1, beep_tlv),
 108         SOC_SINGLE("Beep Switch", AC97_PC_BEEP, 15, 1, 1),
 109         SOC_SINGLE("Beep Frequency", AC97_PC_BEEP, 5, 127, 1),
 110         SOC_SINGLE_TLV("Phone Volume", AC97_PHONE, 0, 31, 1, mix_tlv),
 111         SOC_SINGLE("Phone Switch", AC97_PHONE, 15, 1, 1),
 112
 113         SOC_ENUM("Mic Boost1", stac9766_boost1_enum),
 114         SOC_ENUM("Mic Boost2", stac9766_boost2_enum),
 115         SOC_SINGLE_TLV("Mic Volume", AC97_MIC, 0, 31, 1, mix_tlv),
 116         SOC_SINGLE("Mic Switch", AC97_MIC, 15, 1, 1),
 117         SOC_ENUM("Stereo Mic", stac9766_stereo_mic_enum),
 118
 119         SOC_DOUBLE_TLV("Line Volume", AC97_LINE, 8, 0, 31, 1, mix_tlv),
 120         SOC_SINGLE("Line Switch", AC97_LINE, 15, 1, 1),
 121         SOC_DOUBLE_TLV("CD Volume", AC97_CD, 8, 0, 31, 1, mix_tlv),
 122         SOC_SINGLE("CD Switch", AC97_CD, 15, 1, 1),
 123         SOC_DOUBLE_TLV("AUX Volume", AC97_AUX, 8, 0, 31, 1, mix_tlv),
 124         SOC_SINGLE("AUX Switch", AC97_AUX, 15, 1, 1),
 125         SOC_DOUBLE_TLV("Video Volume", AC97_VIDEO, 8, 0, 31, 1, mix_tlv),
 126         SOC_SINGLE("Video Switch", AC97_VIDEO, 15, 1, 1),
 127
 128         SOC_DOUBLE_TLV("DAC Volume", AC97_PCM, 8, 0, 31, 1, mix_tlv),
 129         SOC_SINGLE("DAC Switch", AC97_PCM, 15, 1, 1),
 130         SOC_SINGLE("Loopback Test Switch", AC97_GENERAL_PURPOSE, 7, 1, 0),
 131         SOC_SINGLE("3D Volume", AC97_3D_CONTROL, 3, 2, 1),
 132         SOC_SINGLE("3D Switch", AC97_GENERAL_PURPOSE, 13, 1, 0),
 133
 134         SOC_ENUM("SPDIF Mux", stac9766_SPDIF_enum),
 135         SOC_ENUM("Mic1/2 Mux", stac9766_mic_enum),
 136         SOC_ENUM("Record All Mux", stac9766_record_all_enum),
 137         SOC_ENUM("Record Mux", stac9766_record_enum),
 138         SOC_ENUM("Mono Mux", stac9766_mono_enum),
 139         SOC_ENUM("Pop Bypass Mux", stac9766_popbypass_enum),
 140 };
 141
 142 static int stac9766_ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 143                                unsigned int val)
 144 {
 145         u16 *cache = codec->reg_cache;
 146
 147         if (reg > AC97_STAC_PAGE0) {
 148                 stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
 149                 soc_ac97_ops.write(codec->ac97, reg, val);
 150                 stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
 151                 return 0;
 152         }
 153         if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
 154                 return -EIO;
 155
 156         soc_ac97_ops.write(codec->ac97, reg, val);
 157         cache[reg / 2] = val;
 158         return 0;
 159 }
 160
 161 static unsigned int stac9766_ac97_read(struct snd_soc_codec *codec,
 162                                        unsigned int reg)
 163 {
 164         u16 val = 0, *cache = codec->reg_cache;
 165
 166         if (reg > AC97_STAC_PAGE0) {
 167                 stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
 168                 val = soc_ac97_ops.read(codec->ac97, reg - AC97_STAC_PAGE0);
 169                 stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
 170                 return val;
 171         }
 172         if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
 173                 return -EIO;
 174
 175         if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
 176                 reg == AC97_INT_PAGING || reg == AC97_VENDOR_ID1 ||
 177                 reg == AC97_VENDOR_ID2) {
 178
 179                 val = soc_ac97_ops.read(codec->ac97, reg);
 180                 return val;
 181         }
 182         return cache[reg / 2];
 183 }
 184
 185 static int ac97_analog_prepare(struct snd_pcm_substream *substream,
 186                                struct snd_soc_dai *dai)
 187 {
 188         struct snd_soc_codec *codec = dai->codec;
 189         struct snd_pcm_runtime *runtime = substream->runtime;
 190         unsigned short reg, vra;
 191
 192         vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
 193
 194         vra |= 0x1; /* enable variable rate audio */
 195         vra &= ~0x4; /* disable SPDIF output */
 196
 197         stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
 198
 199         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 200                 reg = AC97_PCM_FRONT_DAC_RATE;
 201         else
 202                 reg = AC97_PCM_LR_ADC_RATE;
 203
 204         return stac9766_ac97_write(codec, reg, runtime->rate);
 205 }
 206
 207 static int ac97_digital_prepare(struct snd_pcm_substream *substream,
 208                                 struct snd_soc_dai *dai)
 209 {
 210         struct snd_soc_codec *codec = dai->codec;
 211         struct snd_pcm_runtime *runtime = substream->runtime;
 212         unsigned short reg, vra;
 213
 214         stac9766_ac97_write(codec, AC97_SPDIF, 0x2002);
 215
 216         vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
 217         vra |= 0x5; /* Enable VRA and SPDIF out */
 218
 219         stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
 220
 221         reg = AC97_PCM_FRONT_DAC_RATE;
 222
 223         return stac9766_ac97_write(codec, reg, runtime->rate);
 224 }
 225
 226 static int stac9766_set_bias_level(struct snd_soc_codec *codec,
 227                                    enum snd_soc_bias_level level)
 228 {
 229         switch (level) {
 230         case SND_SOC_BIAS_ON: /* full On */
 231         case SND_SOC_BIAS_PREPARE: /* partial On */
 232         case SND_SOC_BIAS_STANDBY: /* Off, with power */
 233                 stac9766_ac97_write(codec, AC97_POWERDOWN, 0x0000);
 234                 break;
 235         case SND_SOC_BIAS_OFF: /* Off, without power */
 236                 /* disable everything including AC link */
 237                 stac9766_ac97_write(codec, AC97_POWERDOWN, 0xffff);
 238                 break;
 239         }
 240         codec->bias_level = level;
 241         return 0;
 242 }
 243
 244 static int stac9766_reset(struct snd_soc_codec *codec, int try_warm)
 245 {
 246         if (try_warm && soc_ac97_ops.warm_reset) {
 247                 soc_ac97_ops.warm_reset(codec->ac97);
 248                 if (stac9766_ac97_read(codec, 0) == stac9766_reg[0])
 249                         return 1;
 250         }
 251
 252         soc_ac97_ops.reset(codec->ac97);
 253         if (soc_ac97_ops.warm_reset)
 254                 soc_ac97_ops.warm_reset(codec->ac97);
 255         if (stac9766_ac97_read(codec, 0) != stac9766_reg[0])
 256                 return -EIO;
 257         return 0;
 258 }
 259
 260 static int stac9766_codec_suspend(struct platform_device *pdev,
 261                                   pm_message_t state)
 262 {
 263         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 264         struct snd_soc_codec *codec = socdev->card->codec;
 265
 266         stac9766_set_bias_level(codec, SND_SOC_BIAS_OFF);
 267         return 0;
 268 }
 269
 270 static int stac9766_codec_resume(struct platform_device *pdev)
 271 {
 272         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 273         struct snd_soc_codec *codec = socdev->card->codec;
 274         u16 id, reset;
 275
 276         reset = 0;
 277         /* give the codec an AC97 warm reset to start the link */
 278 reset:
 279         if (reset > 5) {
 280                 printk(KERN_ERR "stac9766 failed to resume");
 281                 return -EIO;
 282         }
 283         codec->ac97->bus->ops->warm_reset(codec->ac97);
 284         id = soc_ac97_ops.read(codec->ac97, AC97_VENDOR_ID2);
 285         if (id != 0x4c13) {
 286                 stac9766_reset(codec, 0);
 287                 reset++;
 288                 goto reset;
 289         }
 290         stac9766_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 291
 292         if (codec->suspend_bias_level == SND_SOC_BIAS_ON)
 293                 stac9766_set_bias_level(codec, SND_SOC_BIAS_ON);
 294
 295         return 0;
 296 }
 297
 298 static struct snd_soc_dai_ops stac9766_dai_ops_analog = {
 299         .prepare = ac97_analog_prepare,
 300 };
 301
 302 static struct snd_soc_dai_ops stac9766_dai_ops_digital = {
 303         .prepare = ac97_digital_prepare,
 304 };
 305
 306 struct snd_soc_dai stac9766_dai[] = {
 307 {
 308         .name = "stac9766 analog",
 309         .id = 0,
 310         .ac97_control = 1,
 311
 312         /* stream cababilities */
 313         .playback = {
 314                 .stream_name = "stac9766 analog",
 315                 .channels_min = 1,
 316                 .channels_max = 2,
 317                 .rates = SNDRV_PCM_RATE_8000_48000,
 318                 .formats = SND_SOC_STD_AC97_FMTS,
 319         },
 320         .capture = {
 321                 .stream_name = "stac9766 analog",
 322                 .channels_min = 1,
 323                 .channels_max = 2,
 324                 .rates = SNDRV_PCM_RATE_8000_48000,
 325                 .formats = SND_SOC_STD_AC97_FMTS,
 326         },
 327         /* alsa ops */
 328         .ops = &stac9766_dai_ops_analog,
 329 },
 330 {
 331         .name = "stac9766 IEC958",
 332         .id = 1,
 333         .ac97_control = 1,
 334
 335         /* stream cababilities */
 336         .playback = {
 337                 .stream_name = "stac9766 IEC958",
 338                 .channels_min = 1,
 339                 .channels_max = 2,
 340                 .rates = SNDRV_PCM_RATE_32000 | \
 341                         SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
 342                 .formats = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,
 343         },
 344         /* alsa ops */
 345         .ops = &stac9766_dai_ops_digital,
 346 }
 347 };
 348 EXPORT_SYMBOL_GPL(stac9766_dai);
 349
 350 static int stac9766_codec_probe(struct platform_device *pdev)
 351 {
 352         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 353         struct snd_soc_codec *codec;
 354         int ret = 0;
 355
 356         printk(KERN_INFO "STAC9766 SoC Audio Codec %s\n", STAC9766_VERSION);
 357
 358         socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 359         if (socdev->card->codec == NULL)
 360                 return -ENOMEM;
 361         codec = socdev->card->codec;
 362         mutex_init(&codec->mutex);
 363
 364         codec->reg_cache = kmemdup(stac9766_reg, sizeof(stac9766_reg),
 365                                    GFP_KERNEL);
 366         if (codec->reg_cache == NULL) {
 367                 ret = -ENOMEM;
 368                 goto cache_err;
 369         }
 370         codec->reg_cache_size = sizeof(stac9766_reg);
 371         codec->reg_cache_step = 2;
 372
 373         codec->name = "STAC9766";
 374         codec->owner = THIS_MODULE;
 375         codec->dai = stac9766_dai;
 376         codec->num_dai = ARRAY_SIZE(stac9766_dai);
 377         codec->write = stac9766_ac97_write;
 378         codec->read = stac9766_ac97_read;
 379         codec->set_bias_level = stac9766_set_bias_level;
 380         INIT_LIST_HEAD(&codec->dapm_widgets);
 381         INIT_LIST_HEAD(&codec->dapm_paths);
 382
 383         ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
 384         if (ret < 0)
 385                 goto codec_err;
 386
 387         /* register pcms */
 388         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 389         if (ret < 0)
 390                 goto pcm_err;
 391
 392         /* do a cold reset for the controller and then try
 393          * a warm reset followed by an optional cold reset for codec */
 394         stac9766_reset(codec, 0);
 395         ret = stac9766_reset(codec, 1);
 396         if (ret < 0) {
 397                 printk(KERN_ERR "Failed to reset STAC9766: AC97 link error\n");
 398                 goto reset_err;
 399         }
 400
 401         stac9766_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 402
 403         snd_soc_add_controls(codec, stac9766_snd_ac97_controls,
 404                              ARRAY_SIZE(stac9766_snd_ac97_controls));
 405
 406         return 0;
 407
 408 reset_err:
 409         snd_soc_free_pcms(socdev);
 410 pcm_err:
 411         snd_soc_free_ac97_codec(codec);
 412 codec_err:
 413         kfree(codec->private_data);
 414 cache_err:
 415         kfree(socdev->card->codec);
 416         socdev->card->codec = NULL;
 417         return ret;
 418 }
 419
 420 static int stac9766_codec_remove(struct platform_device *pdev)
 421 {
 422         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 423         struct snd_soc_codec *codec = socdev->card->codec;
 424
 425         if (codec == NULL)
 426                 return 0;
 427
 428         snd_soc_free_pcms(socdev);
 429         snd_soc_free_ac97_codec(codec);
 430         kfree(codec->reg_cache);
 431         kfree(codec);
 432         return 0;
 433 }
 434
 435 struct snd_soc_codec_device soc_codec_dev_stac9766 = {
 436         .probe = stac9766_codec_probe,
 437         .remove = stac9766_codec_remove,
 438         .suspend = stac9766_codec_suspend,
 439         .resume = stac9766_codec_resume,
 440 };
 441 EXPORT_SYMBOL_GPL(soc_codec_dev_stac9766);
 442
 443 MODULE_DESCRIPTION("ASoC stac9766 driver");
 444 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
 445 MODULE_LICENSE("GPL");