sound/aoa/codecs/tas.c

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This source file includes following definitions.
codec_to_tas
tas_write_reg
tas3004_set_drc
tas_set_treble
tas_set_bass
tas_set_volume
tas_set_mixer
tas_dev_register
tas_snd_vol_info
tas_snd_vol_get
tas_snd_vol_put
tas_snd_mute_get
tas_snd_mute_put
tas_snd_mixer_info
tas_snd_mixer_get
tas_snd_mixer_put
tas_snd_drc_range_info
tas_snd_drc_range_get
tas_snd_drc_range_put
tas_snd_drc_switch_get
tas_snd_drc_switch_put
tas_snd_capture_source_info
tas_snd_capture_source_get
tas_snd_capture_source_put
tas_snd_treble_info
tas_snd_treble_get
tas_snd_treble_put
tas_snd_bass_info
tas_snd_bass_get
tas_snd_bass_put
tas_usable
tas_reset_init
tas_switch_clock
tas_suspend
tas_resume
_tas_suspend
_tas_resume
tas_init_codec
tas_exit_codec
tas_i2c_probe
tas_i2c_remove
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Apple Onboard Audio driver for tas codec
   4  *
   5  * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * Open questions:
   8  *  - How to distinguish between 3004 and versions?
   9  *
  10  * FIXMEs:
  11  *  - This codec driver doesn't honour the 'connected'
  12  *    property of the aoa_codec struct, hence if
  13  *    it is used in machines where not everything is
  14  *    connected it will display wrong mixer elements.
  15  *  - Driver assumes that the microphone is always
  16  *    monaureal and connected to the right channel of
  17  *    the input. This should also be a codec-dependent
  18  *    flag, maybe the codec should have 3 different
  19  *    bits for the three different possibilities how
  20  *    it can be hooked up...
  21  *    But as long as I don't see any hardware hooked
  22  *    up that way...
  23  *  - As Apple notes in their code, the tas3004 seems
  24  *    to delay the right channel by one sample. You can
  25  *    see this when for example recording stereo in
  26  *    audacity, or recording the tas output via cable
  27  *    on another machine (use a sinus generator or so).
  28  *    I tried programming the BiQuads but couldn't
  29  *    make the delay work, maybe someone can read the
  30  *    datasheet and fix it. The relevant Apple comment
  31  *    is in AppleTAS3004Audio.cpp lines 1637 ff. Note
  32  *    that their comment describing how they program
  33  *    the filters sucks...
  34  *
  35  * Other things:
  36  *  - this should actually register *two* aoa_codec
  37  *    structs since it has two inputs. Then it must
  38  *    use the prepare callback to forbid running the
  39  *    secondary output on a different clock.
  40  *    Also, whatever bus knows how to do this must
  41  *    provide two soundbus_dev devices and the fabric
  42  *    must be able to link them correctly.
  43  *
  44  *    I don't even know if Apple ever uses the second
  45  *    port on the tas3004 though, I don't think their
  46  *    i2s controllers can even do it. OTOH, they all
  47  *    derive the clocks from common clocks, so it
  48  *    might just be possible. The framework allows the
  49  *    codec to refine the transfer_info items in the
  50  *    usable callback, so we can simply remove the
  51  *    rates the second instance is not using when it
  52  *    actually is in use.
  53  *    Maybe we'll need to make the sound busses have
  54  *    a 'clock group id' value so the codec can
  55  *    determine if the two outputs can be driven at
  56  *    the same time. But that is likely overkill, up
  57  *    to the fabric to not link them up incorrectly,
  58  *    and up to the hardware designer to not wire
  59  *    them up in some weird unusable way.
  60  */
  61 #include <stddef.h>
  62 #include <linux/i2c.h>
  63 #include <asm/pmac_low_i2c.h>
  64 #include <asm/prom.h>
  65 #include <linux/delay.h>
  66 #include <linux/module.h>
  67 #include <linux/mutex.h>
  68 #include <linux/slab.h>
  69 
  70 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
  71 MODULE_LICENSE("GPL");
  72 MODULE_DESCRIPTION("tas codec driver for snd-aoa");
  73 
  74 #include "tas.h"
  75 #include "tas-gain-table.h"
  76 #include "tas-basstreble.h"
  77 #include "../aoa.h"
  78 #include "../soundbus/soundbus.h"
  79 
  80 #define PFX "snd-aoa-codec-tas: "
  81 
  82 
  83 struct tas {
  84         struct aoa_codec        codec;
  85         struct i2c_client       *i2c;
  86         u32                     mute_l:1, mute_r:1 ,
  87                                 controls_created:1 ,
  88                                 drc_enabled:1,
  89                                 hw_enabled:1;
  90         u8                      cached_volume_l, cached_volume_r;
  91         u8                      mixer_l[3], mixer_r[3];
  92         u8                      bass, treble;
  93         u8                      acr;
  94         int                     drc_range;
  95         /* protects hardware access against concurrency from
  96          * userspace when hitting controls and during
  97          * codec init/suspend/resume */
  98         struct mutex            mtx;
  99 };
 100 
 101 static int tas_reset_init(struct tas *tas);
 102 
 103 static struct tas *codec_to_tas(struct aoa_codec *codec)
 104 {
 105         return container_of(codec, struct tas, codec);
 106 }
 107 
 108 static inline int tas_write_reg(struct tas *tas, u8 reg, u8 len, u8 *data)
 109 {
 110         if (len == 1)
 111                 return i2c_smbus_write_byte_data(tas->i2c, reg, *data);
 112         else
 113                 return i2c_smbus_write_i2c_block_data(tas->i2c, reg, len, data);
 114 }
 115 
 116 static void tas3004_set_drc(struct tas *tas)
 117 {
 118         unsigned char val[6];
 119 
 120         if (tas->drc_enabled)
 121                 val[0] = 0x50; /* 3:1 above threshold */
 122         else
 123                 val[0] = 0x51; /* disabled */
 124         val[1] = 0x02; /* 1:1 below threshold */
 125         if (tas->drc_range > 0xef)
 126                 val[2] = 0xef;
 127         else if (tas->drc_range < 0)
 128                 val[2] = 0x00;
 129         else
 130                 val[2] = tas->drc_range;
 131         val[3] = 0xb0;
 132         val[4] = 0x60;
 133         val[5] = 0xa0;
 134 
 135         tas_write_reg(tas, TAS_REG_DRC, 6, val);
 136 }
 137 
 138 static void tas_set_treble(struct tas *tas)
 139 {
 140         u8 tmp;
 141 
 142         tmp = tas3004_treble(tas->treble);
 143         tas_write_reg(tas, TAS_REG_TREBLE, 1, &tmp);
 144 }
 145 
 146 static void tas_set_bass(struct tas *tas)
 147 {
 148         u8 tmp;
 149 
 150         tmp = tas3004_bass(tas->bass);
 151         tas_write_reg(tas, TAS_REG_BASS, 1, &tmp);
 152 }
 153 
 154 static void tas_set_volume(struct tas *tas)
 155 {
 156         u8 block[6];
 157         int tmp;
 158         u8 left, right;
 159 
 160         left = tas->cached_volume_l;
 161         right = tas->cached_volume_r;
 162 
 163         if (left > 177) left = 177;
 164         if (right > 177) right = 177;
 165 
 166         if (tas->mute_l) left = 0;
 167         if (tas->mute_r) right = 0;
 168 
 169         /* analysing the volume and mixer tables shows
 170          * that they are similar enough when we shift
 171          * the mixer table down by 4 bits. The error
 172          * is miniscule, in just one item the error
 173          * is 1, at a value of 0x07f17b (mixer table
 174          * value is 0x07f17a) */
 175         tmp = tas_gaintable[left];
 176         block[0] = tmp>>20;
 177         block[1] = tmp>>12;
 178         block[2] = tmp>>4;
 179         tmp = tas_gaintable[right];
 180         block[3] = tmp>>20;
 181         block[4] = tmp>>12;
 182         block[5] = tmp>>4;
 183         tas_write_reg(tas, TAS_REG_VOL, 6, block);
 184 }
 185 
 186 static void tas_set_mixer(struct tas *tas)
 187 {
 188         u8 block[9];
 189         int tmp, i;
 190         u8 val;
 191 
 192         for (i=0;i<3;i++) {
 193                 val = tas->mixer_l[i];
 194                 if (val > 177) val = 177;
 195                 tmp = tas_gaintable[val];
 196                 block[3*i+0] = tmp>>16;
 197                 block[3*i+1] = tmp>>8;
 198                 block[3*i+2] = tmp;
 199         }
 200         tas_write_reg(tas, TAS_REG_LMIX, 9, block);
 201 
 202         for (i=0;i<3;i++) {
 203                 val = tas->mixer_r[i];
 204                 if (val > 177) val = 177;
 205                 tmp = tas_gaintable[val];
 206                 block[3*i+0] = tmp>>16;
 207                 block[3*i+1] = tmp>>8;
 208                 block[3*i+2] = tmp;
 209         }
 210         tas_write_reg(tas, TAS_REG_RMIX, 9, block);
 211 }
 212 
 213 /* alsa stuff */
 214 
 215 static int tas_dev_register(struct snd_device *dev)
 216 {
 217         return 0;
 218 }
 219 
 220 static struct snd_device_ops ops = {
 221         .dev_register = tas_dev_register,
 222 };
 223 
 224 static int tas_snd_vol_info(struct snd_kcontrol *kcontrol,
 225         struct snd_ctl_elem_info *uinfo)
 226 {
 227         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 228         uinfo->count = 2;
 229         uinfo->value.integer.min = 0;
 230         uinfo->value.integer.max = 177;
 231         return 0;
 232 }
 233 
 234 static int tas_snd_vol_get(struct snd_kcontrol *kcontrol,
 235         struct snd_ctl_elem_value *ucontrol)
 236 {
 237         struct tas *tas = snd_kcontrol_chip(kcontrol);
 238 
 239         mutex_lock(&tas->mtx);
 240         ucontrol->value.integer.value[0] = tas->cached_volume_l;
 241         ucontrol->value.integer.value[1] = tas->cached_volume_r;
 242         mutex_unlock(&tas->mtx);
 243         return 0;
 244 }
 245 
 246 static int tas_snd_vol_put(struct snd_kcontrol *kcontrol,
 247         struct snd_ctl_elem_value *ucontrol)
 248 {
 249         struct tas *tas = snd_kcontrol_chip(kcontrol);
 250 
 251         if (ucontrol->value.integer.value[0] < 0 ||
 252             ucontrol->value.integer.value[0] > 177)
 253                 return -EINVAL;
 254         if (ucontrol->value.integer.value[1] < 0 ||
 255             ucontrol->value.integer.value[1] > 177)
 256                 return -EINVAL;
 257 
 258         mutex_lock(&tas->mtx);
 259         if (tas->cached_volume_l == ucontrol->value.integer.value[0]
 260          && tas->cached_volume_r == ucontrol->value.integer.value[1]) {
 261                 mutex_unlock(&tas->mtx);
 262                 return 0;
 263         }
 264 
 265         tas->cached_volume_l = ucontrol->value.integer.value[0];
 266         tas->cached_volume_r = ucontrol->value.integer.value[1];
 267         if (tas->hw_enabled)
 268                 tas_set_volume(tas);
 269         mutex_unlock(&tas->mtx);
 270         return 1;
 271 }
 272 
 273 static const struct snd_kcontrol_new volume_control = {
 274         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 275         .name = "Master Playback Volume",
 276         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 277         .info = tas_snd_vol_info,
 278         .get = tas_snd_vol_get,
 279         .put = tas_snd_vol_put,
 280 };
 281 
 282 #define tas_snd_mute_info       snd_ctl_boolean_stereo_info
 283 
 284 static int tas_snd_mute_get(struct snd_kcontrol *kcontrol,
 285         struct snd_ctl_elem_value *ucontrol)
 286 {
 287         struct tas *tas = snd_kcontrol_chip(kcontrol);
 288 
 289         mutex_lock(&tas->mtx);
 290         ucontrol->value.integer.value[0] = !tas->mute_l;
 291         ucontrol->value.integer.value[1] = !tas->mute_r;
 292         mutex_unlock(&tas->mtx);
 293         return 0;
 294 }
 295 
 296 static int tas_snd_mute_put(struct snd_kcontrol *kcontrol,
 297         struct snd_ctl_elem_value *ucontrol)
 298 {
 299         struct tas *tas = snd_kcontrol_chip(kcontrol);
 300 
 301         mutex_lock(&tas->mtx);
 302         if (tas->mute_l == !ucontrol->value.integer.value[0]
 303          && tas->mute_r == !ucontrol->value.integer.value[1]) {
 304                 mutex_unlock(&tas->mtx);
 305                 return 0;
 306         }
 307 
 308         tas->mute_l = !ucontrol->value.integer.value[0];
 309         tas->mute_r = !ucontrol->value.integer.value[1];
 310         if (tas->hw_enabled)
 311                 tas_set_volume(tas);
 312         mutex_unlock(&tas->mtx);
 313         return 1;
 314 }
 315 
 316 static const struct snd_kcontrol_new mute_control = {
 317         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 318         .name = "Master Playback Switch",
 319         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 320         .info = tas_snd_mute_info,
 321         .get = tas_snd_mute_get,
 322         .put = tas_snd_mute_put,
 323 };
 324 
 325 static int tas_snd_mixer_info(struct snd_kcontrol *kcontrol,
 326         struct snd_ctl_elem_info *uinfo)
 327 {
 328         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 329         uinfo->count = 2;
 330         uinfo->value.integer.min = 0;
 331         uinfo->value.integer.max = 177;
 332         return 0;
 333 }
 334 
 335 static int tas_snd_mixer_get(struct snd_kcontrol *kcontrol,
 336         struct snd_ctl_elem_value *ucontrol)
 337 {
 338         struct tas *tas = snd_kcontrol_chip(kcontrol);
 339         int idx = kcontrol->private_value;
 340 
 341         mutex_lock(&tas->mtx);
 342         ucontrol->value.integer.value[0] = tas->mixer_l[idx];
 343         ucontrol->value.integer.value[1] = tas->mixer_r[idx];
 344         mutex_unlock(&tas->mtx);
 345 
 346         return 0;
 347 }
 348 
 349 static int tas_snd_mixer_put(struct snd_kcontrol *kcontrol,
 350         struct snd_ctl_elem_value *ucontrol)
 351 {
 352         struct tas *tas = snd_kcontrol_chip(kcontrol);
 353         int idx = kcontrol->private_value;
 354 
 355         mutex_lock(&tas->mtx);
 356         if (tas->mixer_l[idx] == ucontrol->value.integer.value[0]
 357          && tas->mixer_r[idx] == ucontrol->value.integer.value[1]) {
 358                 mutex_unlock(&tas->mtx);
 359                 return 0;
 360         }
 361 
 362         tas->mixer_l[idx] = ucontrol->value.integer.value[0];
 363         tas->mixer_r[idx] = ucontrol->value.integer.value[1];
 364 
 365         if (tas->hw_enabled)
 366                 tas_set_mixer(tas);
 367         mutex_unlock(&tas->mtx);
 368         return 1;
 369 }
 370 
 371 #define MIXER_CONTROL(n,descr,idx)                      \
 372 static struct snd_kcontrol_new n##_control = {          \
 373         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,            \
 374         .name = descr " Playback Volume",               \
 375         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,      \
 376         .info = tas_snd_mixer_info,                     \
 377         .get = tas_snd_mixer_get,                       \
 378         .put = tas_snd_mixer_put,                       \
 379         .private_value = idx,                           \
 380 }
 381 
 382 MIXER_CONTROL(pcm1, "PCM", 0);
 383 MIXER_CONTROL(monitor, "Monitor", 2);
 384 
 385 static int tas_snd_drc_range_info(struct snd_kcontrol *kcontrol,
 386         struct snd_ctl_elem_info *uinfo)
 387 {
 388         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 389         uinfo->count = 1;
 390         uinfo->value.integer.min = 0;
 391         uinfo->value.integer.max = TAS3004_DRC_MAX;
 392         return 0;
 393 }
 394 
 395 static int tas_snd_drc_range_get(struct snd_kcontrol *kcontrol,
 396         struct snd_ctl_elem_value *ucontrol)
 397 {
 398         struct tas *tas = snd_kcontrol_chip(kcontrol);
 399 
 400         mutex_lock(&tas->mtx);
 401         ucontrol->value.integer.value[0] = tas->drc_range;
 402         mutex_unlock(&tas->mtx);
 403         return 0;
 404 }
 405 
 406 static int tas_snd_drc_range_put(struct snd_kcontrol *kcontrol,
 407         struct snd_ctl_elem_value *ucontrol)
 408 {
 409         struct tas *tas = snd_kcontrol_chip(kcontrol);
 410 
 411         if (ucontrol->value.integer.value[0] < 0 ||
 412             ucontrol->value.integer.value[0] > TAS3004_DRC_MAX)
 413                 return -EINVAL;
 414 
 415         mutex_lock(&tas->mtx);
 416         if (tas->drc_range == ucontrol->value.integer.value[0]) {
 417                 mutex_unlock(&tas->mtx);
 418                 return 0;
 419         }
 420 
 421         tas->drc_range = ucontrol->value.integer.value[0];
 422         if (tas->hw_enabled)
 423                 tas3004_set_drc(tas);
 424         mutex_unlock(&tas->mtx);
 425         return 1;
 426 }
 427 
 428 static const struct snd_kcontrol_new drc_range_control = {
 429         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 430         .name = "DRC Range",
 431         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 432         .info = tas_snd_drc_range_info,
 433         .get = tas_snd_drc_range_get,
 434         .put = tas_snd_drc_range_put,
 435 };
 436 
 437 #define tas_snd_drc_switch_info         snd_ctl_boolean_mono_info
 438 
 439 static int tas_snd_drc_switch_get(struct snd_kcontrol *kcontrol,
 440         struct snd_ctl_elem_value *ucontrol)
 441 {
 442         struct tas *tas = snd_kcontrol_chip(kcontrol);
 443 
 444         mutex_lock(&tas->mtx);
 445         ucontrol->value.integer.value[0] = tas->drc_enabled;
 446         mutex_unlock(&tas->mtx);
 447         return 0;
 448 }
 449 
 450 static int tas_snd_drc_switch_put(struct snd_kcontrol *kcontrol,
 451         struct snd_ctl_elem_value *ucontrol)
 452 {
 453         struct tas *tas = snd_kcontrol_chip(kcontrol);
 454 
 455         mutex_lock(&tas->mtx);
 456         if (tas->drc_enabled == ucontrol->value.integer.value[0]) {
 457                 mutex_unlock(&tas->mtx);
 458                 return 0;
 459         }
 460 
 461         tas->drc_enabled = !!ucontrol->value.integer.value[0];
 462         if (tas->hw_enabled)
 463                 tas3004_set_drc(tas);
 464         mutex_unlock(&tas->mtx);
 465         return 1;
 466 }
 467 
 468 static const struct snd_kcontrol_new drc_switch_control = {
 469         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 470         .name = "DRC Range Switch",
 471         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 472         .info = tas_snd_drc_switch_info,
 473         .get = tas_snd_drc_switch_get,
 474         .put = tas_snd_drc_switch_put,
 475 };
 476 
 477 static int tas_snd_capture_source_info(struct snd_kcontrol *kcontrol,
 478         struct snd_ctl_elem_info *uinfo)
 479 {
 480         static const char * const texts[] = { "Line-In", "Microphone" };
 481 
 482         return snd_ctl_enum_info(uinfo, 1, 2, texts);
 483 }
 484 
 485 static int tas_snd_capture_source_get(struct snd_kcontrol *kcontrol,
 486         struct snd_ctl_elem_value *ucontrol)
 487 {
 488         struct tas *tas = snd_kcontrol_chip(kcontrol);
 489 
 490         mutex_lock(&tas->mtx);
 491         ucontrol->value.enumerated.item[0] = !!(tas->acr & TAS_ACR_INPUT_B);
 492         mutex_unlock(&tas->mtx);
 493         return 0;
 494 }
 495 
 496 static int tas_snd_capture_source_put(struct snd_kcontrol *kcontrol,
 497         struct snd_ctl_elem_value *ucontrol)
 498 {
 499         struct tas *tas = snd_kcontrol_chip(kcontrol);
 500         int oldacr;
 501 
 502         if (ucontrol->value.enumerated.item[0] > 1)
 503                 return -EINVAL;
 504         mutex_lock(&tas->mtx);
 505         oldacr = tas->acr;
 506 
 507         /*
 508          * Despite what the data sheet says in one place, the
 509          * TAS_ACR_B_MONAUREAL bit forces mono output even when
 510          * input A (line in) is selected.
 511          */
 512         tas->acr &= ~(TAS_ACR_INPUT_B | TAS_ACR_B_MONAUREAL);
 513         if (ucontrol->value.enumerated.item[0])
 514                 tas->acr |= TAS_ACR_INPUT_B | TAS_ACR_B_MONAUREAL |
 515                       TAS_ACR_B_MON_SEL_RIGHT;
 516         if (oldacr == tas->acr) {
 517                 mutex_unlock(&tas->mtx);
 518                 return 0;
 519         }
 520         if (tas->hw_enabled)
 521                 tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr);
 522         mutex_unlock(&tas->mtx);
 523         return 1;
 524 }
 525 
 526 static const struct snd_kcontrol_new capture_source_control = {
 527         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 528         /* If we name this 'Input Source', it properly shows up in
 529          * alsamixer as a selection, * but it's shown under the
 530          * 'Playback' category.
 531          * If I name it 'Capture Source', it shows up in strange
 532          * ways (two bools of which one can be selected at a
 533          * time) but at least it's shown in the 'Capture'
 534          * category.
 535          * I was told that this was due to backward compatibility,
 536          * but I don't understand then why the mangling is *not*
 537          * done when I name it "Input Source".....
 538          */
 539         .name = "Capture Source",
 540         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 541         .info = tas_snd_capture_source_info,
 542         .get = tas_snd_capture_source_get,
 543         .put = tas_snd_capture_source_put,
 544 };
 545 
 546 static int tas_snd_treble_info(struct snd_kcontrol *kcontrol,
 547         struct snd_ctl_elem_info *uinfo)
 548 {
 549         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 550         uinfo->count = 1;
 551         uinfo->value.integer.min = TAS3004_TREBLE_MIN;
 552         uinfo->value.integer.max = TAS3004_TREBLE_MAX;
 553         return 0;
 554 }
 555 
 556 static int tas_snd_treble_get(struct snd_kcontrol *kcontrol,
 557         struct snd_ctl_elem_value *ucontrol)
 558 {
 559         struct tas *tas = snd_kcontrol_chip(kcontrol);
 560 
 561         mutex_lock(&tas->mtx);
 562         ucontrol->value.integer.value[0] = tas->treble;
 563         mutex_unlock(&tas->mtx);
 564         return 0;
 565 }
 566 
 567 static int tas_snd_treble_put(struct snd_kcontrol *kcontrol,
 568         struct snd_ctl_elem_value *ucontrol)
 569 {
 570         struct tas *tas = snd_kcontrol_chip(kcontrol);
 571 
 572         if (ucontrol->value.integer.value[0] < TAS3004_TREBLE_MIN ||
 573             ucontrol->value.integer.value[0] > TAS3004_TREBLE_MAX)
 574                 return -EINVAL;
 575         mutex_lock(&tas->mtx);
 576         if (tas->treble == ucontrol->value.integer.value[0]) {
 577                 mutex_unlock(&tas->mtx);
 578                 return 0;
 579         }
 580 
 581         tas->treble = ucontrol->value.integer.value[0];
 582         if (tas->hw_enabled)
 583                 tas_set_treble(tas);
 584         mutex_unlock(&tas->mtx);
 585         return 1;
 586 }
 587 
 588 static const struct snd_kcontrol_new treble_control = {
 589         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 590         .name = "Treble",
 591         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 592         .info = tas_snd_treble_info,
 593         .get = tas_snd_treble_get,
 594         .put = tas_snd_treble_put,
 595 };
 596 
 597 static int tas_snd_bass_info(struct snd_kcontrol *kcontrol,
 598         struct snd_ctl_elem_info *uinfo)
 599 {
 600         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 601         uinfo->count = 1;
 602         uinfo->value.integer.min = TAS3004_BASS_MIN;
 603         uinfo->value.integer.max = TAS3004_BASS_MAX;
 604         return 0;
 605 }
 606 
 607 static int tas_snd_bass_get(struct snd_kcontrol *kcontrol,
 608         struct snd_ctl_elem_value *ucontrol)
 609 {
 610         struct tas *tas = snd_kcontrol_chip(kcontrol);
 611 
 612         mutex_lock(&tas->mtx);
 613         ucontrol->value.integer.value[0] = tas->bass;
 614         mutex_unlock(&tas->mtx);
 615         return 0;
 616 }
 617 
 618 static int tas_snd_bass_put(struct snd_kcontrol *kcontrol,
 619         struct snd_ctl_elem_value *ucontrol)
 620 {
 621         struct tas *tas = snd_kcontrol_chip(kcontrol);
 622 
 623         if (ucontrol->value.integer.value[0] < TAS3004_BASS_MIN ||
 624             ucontrol->value.integer.value[0] > TAS3004_BASS_MAX)
 625                 return -EINVAL;
 626         mutex_lock(&tas->mtx);
 627         if (tas->bass == ucontrol->value.integer.value[0]) {
 628                 mutex_unlock(&tas->mtx);
 629                 return 0;
 630         }
 631 
 632         tas->bass = ucontrol->value.integer.value[0];
 633         if (tas->hw_enabled)
 634                 tas_set_bass(tas);
 635         mutex_unlock(&tas->mtx);
 636         return 1;
 637 }
 638 
 639 static const struct snd_kcontrol_new bass_control = {
 640         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 641         .name = "Bass",
 642         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 643         .info = tas_snd_bass_info,
 644         .get = tas_snd_bass_get,
 645         .put = tas_snd_bass_put,
 646 };
 647 
 648 static struct transfer_info tas_transfers[] = {
 649         {
 650                 /* input */
 651                 .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S24_BE,
 652                 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
 653                 .transfer_in = 1,
 654         },
 655         {
 656                 /* output */
 657                 .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S24_BE,
 658                 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
 659                 .transfer_in = 0,
 660         },
 661         {}
 662 };
 663 
 664 static int tas_usable(struct codec_info_item *cii,
 665                       struct transfer_info *ti,
 666                       struct transfer_info *out)
 667 {
 668         return 1;
 669 }
 670 
 671 static int tas_reset_init(struct tas *tas)
 672 {
 673         u8 tmp;
 674 
 675         tas->codec.gpio->methods->all_amps_off(tas->codec.gpio);
 676         msleep(5);
 677         tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 0);
 678         msleep(5);
 679         tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 1);
 680         msleep(20);
 681         tas->codec.gpio->methods->set_hw_reset(tas->codec.gpio, 0);
 682         msleep(10);
 683         tas->codec.gpio->methods->all_amps_restore(tas->codec.gpio);
 684 
 685         tmp = TAS_MCS_SCLK64 | TAS_MCS_SPORT_MODE_I2S | TAS_MCS_SPORT_WL_24BIT;
 686         if (tas_write_reg(tas, TAS_REG_MCS, 1, &tmp))
 687                 goto outerr;
 688 
 689         tas->acr |= TAS_ACR_ANALOG_PDOWN;
 690         if (tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr))
 691                 goto outerr;
 692 
 693         tmp = 0;
 694         if (tas_write_reg(tas, TAS_REG_MCS2, 1, &tmp))
 695                 goto outerr;
 696 
 697         tas3004_set_drc(tas);
 698 
 699         /* Set treble & bass to 0dB */
 700         tas->treble = TAS3004_TREBLE_ZERO;
 701         tas->bass = TAS3004_BASS_ZERO;
 702         tas_set_treble(tas);
 703         tas_set_bass(tas);
 704 
 705         tas->acr &= ~TAS_ACR_ANALOG_PDOWN;
 706         if (tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr))
 707                 goto outerr;
 708 
 709         return 0;
 710  outerr:
 711         return -ENODEV;
 712 }
 713 
 714 static int tas_switch_clock(struct codec_info_item *cii, enum clock_switch clock)
 715 {
 716         struct tas *tas = cii->codec_data;
 717 
 718         switch(clock) {
 719         case CLOCK_SWITCH_PREPARE_SLAVE:
 720                 /* Clocks are going away, mute mute mute */
 721                 tas->codec.gpio->methods->all_amps_off(tas->codec.gpio);
 722                 tas->hw_enabled = 0;
 723                 break;
 724         case CLOCK_SWITCH_SLAVE:
 725                 /* Clocks are back, re-init the codec */
 726                 mutex_lock(&tas->mtx);
 727                 tas_reset_init(tas);
 728                 tas_set_volume(tas);
 729                 tas_set_mixer(tas);
 730                 tas->hw_enabled = 1;
 731                 tas->codec.gpio->methods->all_amps_restore(tas->codec.gpio);
 732                 mutex_unlock(&tas->mtx);
 733                 break;
 734         default:
 735                 /* doesn't happen as of now */
 736                 return -EINVAL;
 737         }
 738         return 0;
 739 }
 740 
 741 #ifdef CONFIG_PM
 742 /* we are controlled via i2c and assume that is always up
 743  * If that wasn't the case, we'd have to suspend once
 744  * our i2c device is suspended, and then take note of that! */
 745 static int tas_suspend(struct tas *tas)
 746 {
 747         mutex_lock(&tas->mtx);
 748         tas->hw_enabled = 0;
 749         tas->acr |= TAS_ACR_ANALOG_PDOWN;
 750         tas_write_reg(tas, TAS_REG_ACR, 1, &tas->acr);
 751         mutex_unlock(&tas->mtx);
 752         return 0;
 753 }
 754 
 755 static int tas_resume(struct tas *tas)
 756 {
 757         /* reset codec */
 758         mutex_lock(&tas->mtx);
 759         tas_reset_init(tas);
 760         tas_set_volume(tas);
 761         tas_set_mixer(tas);
 762         tas->hw_enabled = 1;
 763         mutex_unlock(&tas->mtx);
 764         return 0;
 765 }
 766 
 767 static int _tas_suspend(struct codec_info_item *cii, pm_message_t state)
 768 {
 769         return tas_suspend(cii->codec_data);
 770 }
 771 
 772 static int _tas_resume(struct codec_info_item *cii)
 773 {
 774         return tas_resume(cii->codec_data);
 775 }
 776 #else /* CONFIG_PM */
 777 #define _tas_suspend    NULL
 778 #define _tas_resume     NULL
 779 #endif /* CONFIG_PM */
 780 
 781 static struct codec_info tas_codec_info = {
 782         .transfers = tas_transfers,
 783         /* in theory, we can drive it at 512 too...
 784          * but so far the framework doesn't allow
 785          * for that and I don't see much point in it. */
 786         .sysclock_factor = 256,
 787         /* same here, could be 32 for just one 16 bit format */
 788         .bus_factor = 64,
 789         .owner = THIS_MODULE,
 790         .usable = tas_usable,
 791         .switch_clock = tas_switch_clock,
 792         .suspend = _tas_suspend,
 793         .resume = _tas_resume,
 794 };
 795 
 796 static int tas_init_codec(struct aoa_codec *codec)
 797 {
 798         struct tas *tas = codec_to_tas(codec);
 799         int err;
 800 
 801         if (!tas->codec.gpio || !tas->codec.gpio->methods) {
 802                 printk(KERN_ERR PFX "gpios not assigned!!\n");
 803                 return -EINVAL;
 804         }
 805 
 806         mutex_lock(&tas->mtx);
 807         if (tas_reset_init(tas)) {
 808                 printk(KERN_ERR PFX "tas failed to initialise\n");
 809                 mutex_unlock(&tas->mtx);
 810                 return -ENXIO;
 811         }
 812         tas->hw_enabled = 1;
 813         mutex_unlock(&tas->mtx);
 814 
 815         if (tas->codec.soundbus_dev->attach_codec(tas->codec.soundbus_dev,
 816                                                    aoa_get_card(),
 817                                                    &tas_codec_info, tas)) {
 818                 printk(KERN_ERR PFX "error attaching tas to soundbus\n");
 819                 return -ENODEV;
 820         }
 821 
 822         if (aoa_snd_device_new(SNDRV_DEV_CODEC, tas, &ops)) {
 823                 printk(KERN_ERR PFX "failed to create tas snd device!\n");
 824                 return -ENODEV;
 825         }
 826         err = aoa_snd_ctl_add(snd_ctl_new1(&volume_control, tas));
 827         if (err)
 828                 goto error;
 829 
 830         err = aoa_snd_ctl_add(snd_ctl_new1(&mute_control, tas));
 831         if (err)
 832                 goto error;
 833 
 834         err = aoa_snd_ctl_add(snd_ctl_new1(&pcm1_control, tas));
 835         if (err)
 836                 goto error;
 837 
 838         err = aoa_snd_ctl_add(snd_ctl_new1(&monitor_control, tas));
 839         if (err)
 840                 goto error;
 841 
 842         err = aoa_snd_ctl_add(snd_ctl_new1(&capture_source_control, tas));
 843         if (err)
 844                 goto error;
 845 
 846         err = aoa_snd_ctl_add(snd_ctl_new1(&drc_range_control, tas));
 847         if (err)
 848                 goto error;
 849 
 850         err = aoa_snd_ctl_add(snd_ctl_new1(&drc_switch_control, tas));
 851         if (err)
 852                 goto error;
 853 
 854         err = aoa_snd_ctl_add(snd_ctl_new1(&treble_control, tas));
 855         if (err)
 856                 goto error;
 857 
 858         err = aoa_snd_ctl_add(snd_ctl_new1(&bass_control, tas));
 859         if (err)
 860                 goto error;
 861 
 862         return 0;
 863  error:
 864         tas->codec.soundbus_dev->detach_codec(tas->codec.soundbus_dev, tas);
 865         snd_device_free(aoa_get_card(), tas);
 866         return err;
 867 }
 868 
 869 static void tas_exit_codec(struct aoa_codec *codec)
 870 {
 871         struct tas *tas = codec_to_tas(codec);
 872 
 873         if (!tas->codec.soundbus_dev)
 874                 return;
 875         tas->codec.soundbus_dev->detach_codec(tas->codec.soundbus_dev, tas);
 876 }
 877 
 878 
 879 static int tas_i2c_probe(struct i2c_client *client,
 880                          const struct i2c_device_id *id)
 881 {
 882         struct device_node *node = client->dev.of_node;
 883         struct tas *tas;
 884 
 885         tas = kzalloc(sizeof(struct tas), GFP_KERNEL);
 886 
 887         if (!tas)
 888                 return -ENOMEM;
 889 
 890         mutex_init(&tas->mtx);
 891         tas->i2c = client;
 892         i2c_set_clientdata(client, tas);
 893 
 894         /* seems that half is a saner default */
 895         tas->drc_range = TAS3004_DRC_MAX / 2;
 896 
 897         strlcpy(tas->codec.name, "tas", MAX_CODEC_NAME_LEN);
 898         tas->codec.owner = THIS_MODULE;
 899         tas->codec.init = tas_init_codec;
 900         tas->codec.exit = tas_exit_codec;
 901         tas->codec.node = of_node_get(node);
 902 
 903         if (aoa_codec_register(&tas->codec)) {
 904                 goto fail;
 905         }
 906         printk(KERN_DEBUG
 907                "snd-aoa-codec-tas: tas found, addr 0x%02x on %pOF\n",
 908                (unsigned int)client->addr, node);
 909         return 0;
 910  fail:
 911         mutex_destroy(&tas->mtx);
 912         kfree(tas);
 913         return -EINVAL;
 914 }
 915 
 916 static int tas_i2c_remove(struct i2c_client *client)
 917 {
 918         struct tas *tas = i2c_get_clientdata(client);
 919         u8 tmp = TAS_ACR_ANALOG_PDOWN;
 920 
 921         aoa_codec_unregister(&tas->codec);
 922         of_node_put(tas->codec.node);
 923 
 924         /* power down codec chip */
 925         tas_write_reg(tas, TAS_REG_ACR, 1, &tmp);
 926 
 927         mutex_destroy(&tas->mtx);
 928         kfree(tas);
 929         return 0;
 930 }
 931 
 932 static const struct i2c_device_id tas_i2c_id[] = {
 933         { "MAC,tas3004", 0 },
 934         { }
 935 };
 936 MODULE_DEVICE_TABLE(i2c,tas_i2c_id);
 937 
 938 static struct i2c_driver tas_driver = {
 939         .driver = {
 940                 .name = "aoa_codec_tas",
 941         },
 942         .probe = tas_i2c_probe,
 943         .remove = tas_i2c_remove,
 944         .id_table = tas_i2c_id,
 945 };
 946 
 947 module_i2c_driver(tas_driver);
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root/sound/aoa/codecs/tas.c

DEFINITIONS
