sound/hda/hdac_device.c

   1 /*
   2  * HD-audio codec core device
   3  */
   4
   5 #include <linux/init.h>
   6 #include <linux/device.h>
   7 #include <linux/slab.h>
   8 #include <linux/module.h>
   9 #include <linux/export.h>
  10 #include <linux/pm_runtime.h>
  11 #include <sound/hdaudio.h>
  12 #include <sound/hda_regmap.h>
  13 #include <sound/pcm.h>
  14 #include "local.h"
  15
  16 static void setup_fg_nodes(struct hdac_device *codec);
  17 static int get_codec_vendor_name(struct hdac_device *codec);
  18
  19 static void default_release(struct device *dev)
  20 {
  21         snd_hdac_device_exit(container_of(dev, struct hdac_device, dev));
  22 }
  23
  24 /**
  25  * snd_hdac_device_init - initialize the HD-audio codec base device
  26  * @codec: device to initialize
  27  * @bus: but to attach
  28  * @name: device name string
  29  * @addr: codec address
  30  *
  31  * Returns zero for success or a negative error code.
  32  *
  33  * This function increments the runtime PM counter and marks it active.
  34  * The caller needs to turn it off appropriately later.
  35  *
  36  * The caller needs to set the device's release op properly by itself.
  37  */
  38 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
  39                          const char *name, unsigned int addr)
  40 {
  41         struct device *dev;
  42         hda_nid_t fg;
  43         int err;
  44
  45         dev = &codec->dev;
  46         device_initialize(dev);
  47         dev->parent = bus->dev;
  48         dev->bus = &snd_hda_bus_type;
  49         dev->release = default_release;
  50         dev->groups = hdac_dev_attr_groups;
  51         dev_set_name(dev, "%s", name);
  52         device_enable_async_suspend(dev);
  53
  54         codec->bus = bus;
  55         codec->addr = addr;
  56         codec->type = HDA_DEV_CORE;
  57         pm_runtime_set_active(&codec->dev);
  58         pm_runtime_get_noresume(&codec->dev);
  59         atomic_set(&codec->in_pm, 0);
  60
  61         err = snd_hdac_bus_add_device(bus, codec);
  62         if (err < 0)
  63                 goto error;
  64
  65         /* fill parameters */
  66         codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  67                                               AC_PAR_VENDOR_ID);
  68         if (codec->vendor_id == -1) {
  69                 /* read again, hopefully the access method was corrected
  70                  * in the last read...
  71                  */
  72                 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  73                                                       AC_PAR_VENDOR_ID);
  74         }
  75
  76         codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  77                                                  AC_PAR_SUBSYSTEM_ID);
  78         codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  79                                                 AC_PAR_REV_ID);
  80
  81         setup_fg_nodes(codec);
  82         if (!codec->afg && !codec->mfg) {
  83                 dev_err(dev, "no AFG or MFG node found\n");
  84                 err = -ENODEV;
  85                 goto error;
  86         }
  87
  88         fg = codec->afg ? codec->afg : codec->mfg;
  89
  90         err = snd_hdac_refresh_widgets(codec, false);
  91         if (err < 0)
  92                 goto error;
  93
  94         codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
  95         /* reread ssid if not set by parameter */
  96         if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
  97                 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
  98                               &codec->subsystem_id);
  99
 100         err = get_codec_vendor_name(codec);
 101         if (err < 0)
 102                 goto error;
 103
 104         codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
 105                                      codec->vendor_id & 0xffff);
 106         if (!codec->chip_name) {
 107                 err = -ENOMEM;
 108                 goto error;
 109         }
 110
 111         return 0;
 112
 113  error:
 114         put_device(&codec->dev);
 115         return err;
 116 }
 117 EXPORT_SYMBOL_GPL(snd_hdac_device_init);
 118
 119 /**
 120  * snd_hdac_device_exit - clean up the HD-audio codec base device
 121  * @codec: device to clean up
 122  */
 123 void snd_hdac_device_exit(struct hdac_device *codec)
 124 {
 125         pm_runtime_put_noidle(&codec->dev);
 126         snd_hdac_bus_remove_device(codec->bus, codec);
 127         kfree(codec->vendor_name);
 128         kfree(codec->chip_name);
 129 }
 130 EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
 131
 132 /**
 133  * snd_hdac_device_register - register the hd-audio codec base device
 134  * codec: the device to register
 135  */
 136 int snd_hdac_device_register(struct hdac_device *codec)
 137 {
 138         int err;
 139
 140         err = device_add(&codec->dev);
 141         if (err < 0)
 142                 return err;
 143         err = hda_widget_sysfs_init(codec);
 144         if (err < 0) {
 145                 device_del(&codec->dev);
 146                 return err;
 147         }
 148
 149         return 0;
 150 }
 151 EXPORT_SYMBOL_GPL(snd_hdac_device_register);
 152
 153 /**
 154  * snd_hdac_device_unregister - unregister the hd-audio codec base device
 155  * codec: the device to unregister
 156  */
 157 void snd_hdac_device_unregister(struct hdac_device *codec)
 158 {
 159         if (device_is_registered(&codec->dev)) {
 160                 hda_widget_sysfs_exit(codec);
 161                 device_del(&codec->dev);
 162                 snd_hdac_bus_remove_device(codec->bus, codec);
 163         }
 164 }
 165 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
 166
 167 /**
 168  * snd_hdac_device_set_chip_name - set/update the codec name
 169  * @codec: the HDAC device
 170  * @name: name string to set
 171  *
 172  * Returns 0 if the name is set or updated, or a negative error code.
 173  */
 174 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
 175 {
 176         char *newname;
 177
 178         if (!name)
 179                 return 0;
 180         newname = kstrdup(name, GFP_KERNEL);
 181         if (!newname)
 182                 return -ENOMEM;
 183         kfree(codec->chip_name);
 184         codec->chip_name = newname;
 185         return 0;
 186 }
 187 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
 188
 189 /**
 190  * snd_hdac_codec_modalias - give the module alias name
 191  * @codec: HDAC device
 192  * @buf: string buffer to store
 193  * @size: string buffer size
 194  *
 195  * Returns the size of string, like snprintf(), or a negative error code.
 196  */
 197 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
 198 {
 199         return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
 200                         codec->vendor_id, codec->revision_id, codec->type);
 201 }
 202 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
 203
 204 /**
 205  * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
 206  *      HD-audio controller
 207  * @codec: the codec object
 208  * @nid: NID to encode
 209  * @verb: verb to encode
 210  * @parm: parameter to encode
 211  *
 212  * Return an encoded command verb or -1 for error.
 213  */
 214 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
 215                                unsigned int verb, unsigned int parm)
 216 {
 217         u32 val, addr;
 218
 219         addr = codec->addr;
 220         if ((addr & ~0xf) || (nid & ~0x7f) ||
 221             (verb & ~0xfff) || (parm & ~0xffff)) {
 222                 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
 223                         addr, nid, verb, parm);
 224                 return -1;
 225         }
 226
 227         val = addr << 28;
 228         val |= (u32)nid << 20;
 229         val |= verb << 8;
 230         val |= parm;
 231         return val;
 232 }
 233 EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
 234
 235 /**
 236  * snd_hdac_exec_verb - execute an encoded verb
 237  * @codec: the codec object
 238  * @cmd: encoded verb to execute
 239  * @flags: optional flags, pass zero for default
 240  * @res: the pointer to store the result, NULL if running async
 241  *
 242  * Returns zero if successful, or a negative error code.
 243  *
 244  * This calls the exec_verb op when set in hdac_codec.  If not,
 245  * call the default snd_hdac_bus_exec_verb().
 246  */
 247 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
 248                        unsigned int flags, unsigned int *res)
 249 {
 250         if (codec->exec_verb)
 251                 return codec->exec_verb(codec, cmd, flags, res);
 252         return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
 253 }
 254 EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
 255
 256
 257 /**
 258  * snd_hdac_read - execute a verb
 259  * @codec: the codec object
 260  * @nid: NID to execute a verb
 261  * @verb: verb to execute
 262  * @parm: parameter for a verb
 263  * @res: the pointer to store the result, NULL if running async
 264  *
 265  * Returns zero if successful, or a negative error code.
 266  */
 267 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
 268                   unsigned int verb, unsigned int parm, unsigned int *res)
 269 {
 270         unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
 271
 272         return snd_hdac_exec_verb(codec, cmd, 0, res);
 273 }
 274 EXPORT_SYMBOL_GPL(snd_hdac_read);
 275
 276 /**
 277  * _snd_hdac_read_parm - read a parmeter
 278  *
 279  * This function returns zero or an error unlike snd_hdac_read_parm().
 280  */
 281 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
 282                         unsigned int *res)
 283 {
 284         unsigned int cmd;
 285
 286         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 287         return snd_hdac_regmap_read_raw(codec, cmd, res);
 288 }
 289 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
 290
 291 /**
 292  * snd_hdac_read_parm_uncached - read a codec parameter without caching
 293  * @codec: the codec object
 294  * @nid: NID to read a parameter
 295  * @parm: parameter to read
 296  *
 297  * Returns -1 for error.  If you need to distinguish the error more
 298  * strictly, use snd_hdac_read() directly.
 299  */
 300 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
 301                                 int parm)
 302 {
 303         unsigned int cmd, val;
 304
 305         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 306         if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
 307                 return -1;
 308         return val;
 309 }
 310 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
 311
 312 /**
 313  * snd_hdac_override_parm - override read-only parameters
 314  * @codec: the codec object
 315  * @nid: NID for the parameter
 316  * @parm: the parameter to change
 317  * @val: the parameter value to overwrite
 318  */
 319 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
 320                            unsigned int parm, unsigned int val)
 321 {
 322         unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
 323         int err;
 324
 325         if (!codec->regmap)
 326                 return -EINVAL;
 327
 328         codec->caps_overwriting = true;
 329         err = snd_hdac_regmap_write_raw(codec, verb, val);
 330         codec->caps_overwriting = false;
 331         return err;
 332 }
 333 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
 334
 335 /**
 336  * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
 337  * @codec: the codec object
 338  * @nid: NID to inspect
 339  * @start_id: the pointer to store the starting NID
 340  *
 341  * Returns the number of subtree nodes or zero if not found.
 342  * This function reads parameters always without caching.
 343  */
 344 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 345                            hda_nid_t *start_id)
 346 {
 347         unsigned int parm;
 348
 349         parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
 350         if (parm == -1) {
 351                 *start_id = 0;
 352                 return 0;
 353         }
 354         *start_id = (parm >> 16) & 0x7fff;
 355         return (int)(parm & 0x7fff);
 356 }
 357 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
 358
 359 /*
 360  * look for an AFG and MFG nodes
 361  */
 362 static void setup_fg_nodes(struct hdac_device *codec)
 363 {
 364         int i, total_nodes, function_id;
 365         hda_nid_t nid;
 366
 367         total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
 368         for (i = 0; i < total_nodes; i++, nid++) {
 369                 function_id = snd_hdac_read_parm(codec, nid,
 370                                                  AC_PAR_FUNCTION_TYPE);
 371                 switch (function_id & 0xff) {
 372                 case AC_GRP_AUDIO_FUNCTION:
 373                         codec->afg = nid;
 374                         codec->afg_function_id = function_id & 0xff;
 375                         codec->afg_unsol = (function_id >> 8) & 1;
 376                         break;
 377                 case AC_GRP_MODEM_FUNCTION:
 378                         codec->mfg = nid;
 379                         codec->mfg_function_id = function_id & 0xff;
 380                         codec->mfg_unsol = (function_id >> 8) & 1;
 381                         break;
 382                 default:
 383                         break;
 384                 }
 385         }
 386 }
 387
 388 /**
 389  * snd_hdac_refresh_widgets - Reset the widget start/end nodes
 390  * @codec: the codec object
 391  * @sysfs: re-initialize sysfs tree, too
 392  */
 393 int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs)
 394 {
 395         hda_nid_t start_nid;
 396         int nums, err;
 397
 398         nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
 399         if (!start_nid || nums <= 0 || nums >= 0xff) {
 400                 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
 401                         codec->afg);
 402                 return -EINVAL;
 403         }
 404
 405         if (sysfs) {
 406                 err = hda_widget_sysfs_reinit(codec, start_nid, nums);
 407                 if (err < 0)
 408                         return err;
 409         }
 410
 411         codec->num_nodes = nums;
 412         codec->start_nid = start_nid;
 413         codec->end_nid = start_nid + nums;
 414         return 0;
 415 }
 416 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
 417
 418 /* return CONNLIST_LEN parameter of the given widget */
 419 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
 420 {
 421         unsigned int wcaps = get_wcaps(codec, nid);
 422         unsigned int parm;
 423
 424         if (!(wcaps & AC_WCAP_CONN_LIST) &&
 425             get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
 426                 return 0;
 427
 428         parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
 429         if (parm == -1)
 430                 parm = 0;
 431         return parm;
 432 }
 433
 434 /**
 435  * snd_hdac_get_connections - get a widget connection list
 436  * @codec: the codec object
 437  * @nid: NID
 438  * @conn_list: the array to store the results, can be NULL
 439  * @max_conns: the max size of the given array
 440  *
 441  * Returns the number of connected widgets, zero for no connection, or a
 442  * negative error code.  When the number of elements don't fit with the
 443  * given array size, it returns -ENOSPC.
 444  *
 445  * When @conn_list is NULL, it just checks the number of connections.
 446  */
 447 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 448                              hda_nid_t *conn_list, int max_conns)
 449 {
 450         unsigned int parm;
 451         int i, conn_len, conns, err;
 452         unsigned int shift, num_elems, mask;
 453         hda_nid_t prev_nid;
 454         int null_count = 0;
 455
 456         parm = get_num_conns(codec, nid);
 457         if (!parm)
 458                 return 0;
 459
 460         if (parm & AC_CLIST_LONG) {
 461                 /* long form */
 462                 shift = 16;
 463                 num_elems = 2;
 464         } else {
 465                 /* short form */
 466                 shift = 8;
 467                 num_elems = 4;
 468         }
 469         conn_len = parm & AC_CLIST_LENGTH;
 470         mask = (1 << (shift-1)) - 1;
 471
 472         if (!conn_len)
 473                 return 0; /* no connection */
 474
 475         if (conn_len == 1) {
 476                 /* single connection */
 477                 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
 478                                     &parm);
 479                 if (err < 0)
 480                         return err;
 481                 if (conn_list)
 482                         conn_list[0] = parm & mask;
 483                 return 1;
 484         }
 485
 486         /* multi connection */
 487         conns = 0;
 488         prev_nid = 0;
 489         for (i = 0; i < conn_len; i++) {
 490                 int range_val;
 491                 hda_nid_t val, n;
 492
 493                 if (i % num_elems == 0) {
 494                         err = snd_hdac_read(codec, nid,
 495                                             AC_VERB_GET_CONNECT_LIST, i,
 496                                             &parm);
 497                         if (err < 0)
 498                                 return -EIO;
 499                 }
 500                 range_val = !!(parm & (1 << (shift-1))); /* ranges */
 501                 val = parm & mask;
 502                 if (val == 0 && null_count++) {  /* no second chance */
 503                         dev_dbg(&codec->dev,
 504                                 "invalid CONNECT_LIST verb %x[%i]:%x\n",
 505                                 nid, i, parm);
 506                         return 0;
 507                 }
 508                 parm >>= shift;
 509                 if (range_val) {
 510                         /* ranges between the previous and this one */
 511                         if (!prev_nid || prev_nid >= val) {
 512                                 dev_warn(&codec->dev,
 513                                          "invalid dep_range_val %x:%x\n",
 514                                          prev_nid, val);
 515                                 continue;
 516                         }
 517                         for (n = prev_nid + 1; n <= val; n++) {
 518                                 if (conn_list) {
 519                                         if (conns >= max_conns)
 520                                                 return -ENOSPC;
 521                                         conn_list[conns] = n;
 522                                 }
 523                                 conns++;
 524                         }
 525                 } else {
 526                         if (conn_list) {
 527                                 if (conns >= max_conns)
 528                                         return -ENOSPC;
 529                                 conn_list[conns] = val;
 530                         }
 531                         conns++;
 532                 }
 533                 prev_nid = val;
 534         }
 535         return conns;
 536 }
 537 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
 538
 539 #ifdef CONFIG_PM
 540 /**
 541  * snd_hdac_power_up - power up the codec
 542  * @codec: the codec object
 543  *
 544  * This function calls the runtime PM helper to power up the given codec.
 545  * Unlike snd_hdac_power_up_pm(), you should call this only for the code
 546  * path that isn't included in PM path.  Otherwise it gets stuck.
 547  *
 548  * Returns zero if successful, or a negative error code.
 549  */
 550 int snd_hdac_power_up(struct hdac_device *codec)
 551 {
 552         return pm_runtime_get_sync(&codec->dev);
 553 }
 554 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
 555
 556 /**
 557  * snd_hdac_power_down - power down the codec
 558  * @codec: the codec object
 559  *
 560  * Returns zero if successful, or a negative error code.
 561  */
 562 int snd_hdac_power_down(struct hdac_device *codec)
 563 {
 564         struct device *dev = &codec->dev;
 565
 566         pm_runtime_mark_last_busy(dev);
 567         return pm_runtime_put_autosuspend(dev);
 568 }
 569 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
 570
 571 /**
 572  * snd_hdac_power_up_pm - power up the codec
 573  * @codec: the codec object
 574  *
 575  * This function can be called in a recursive code path like init code
 576  * which may be called by PM suspend/resume again.  OTOH, if a power-up
 577  * call must wake up the sleeper (e.g. in a kctl callback), use
 578  * snd_hdac_power_up() instead.
 579  *
 580  * Returns zero if successful, or a negative error code.
 581  */
 582 int snd_hdac_power_up_pm(struct hdac_device *codec)
 583 {
 584         if (!atomic_inc_not_zero(&codec->in_pm))
 585                 return snd_hdac_power_up(codec);
 586         return 0;
 587 }
 588 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
 589
 590 /* like snd_hdac_power_up_pm(), but only increment the pm count when
 591  * already powered up.  Returns -1 if not powered up, 1 if incremented
 592  * or 0 if unchanged.  Only used in hdac_regmap.c
 593  */
 594 int snd_hdac_keep_power_up(struct hdac_device *codec)
 595 {
 596         if (!atomic_inc_not_zero(&codec->in_pm)) {
 597                 int ret = pm_runtime_get_if_in_use(&codec->dev);
 598                 if (!ret)
 599                         return -1;
 600                 if (ret < 0)
 601                         return 0;
 602         }
 603         return 1;
 604 }
 605
 606 /**
 607  * snd_hdac_power_down_pm - power down the codec
 608  * @codec: the codec object
 609  *
 610  * Like snd_hdac_power_up_pm(), this function is used in a recursive
 611  * code path like init code which may be called by PM suspend/resume again.
 612  *
 613  * Returns zero if successful, or a negative error code.
 614  */
 615 int snd_hdac_power_down_pm(struct hdac_device *codec)
 616 {
 617         if (atomic_dec_if_positive(&codec->in_pm) < 0)
 618                 return snd_hdac_power_down(codec);
 619         return 0;
 620 }
 621 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
 622 #endif
 623
 624 /**
 625  * snd_hdac_link_power - Enable/disable the link power for a codec
 626  * @codec: the codec object
 627  * @bool: enable or disable the link power
 628  */
 629 int snd_hdac_link_power(struct hdac_device *codec, bool enable)
 630 {
 631         if  (!codec->link_power_control)
 632                 return 0;
 633
 634         if  (codec->bus->ops->link_power)
 635                 return codec->bus->ops->link_power(codec->bus, enable);
 636         else
 637                 return -EINVAL;
 638 }
 639 EXPORT_SYMBOL_GPL(snd_hdac_link_power);
 640
 641 /* codec vendor labels */
 642 struct hda_vendor_id {
 643         unsigned int id;
 644         const char *name;
 645 };
 646
 647 static struct hda_vendor_id hda_vendor_ids[] = {
 648         { 0x1002, "ATI" },
 649         { 0x1013, "Cirrus Logic" },
 650         { 0x1057, "Motorola" },
 651         { 0x1095, "Silicon Image" },
 652         { 0x10de, "Nvidia" },
 653         { 0x10ec, "Realtek" },
 654         { 0x1102, "Creative" },
 655         { 0x1106, "VIA" },
 656         { 0x111d, "IDT" },
 657         { 0x11c1, "LSI" },
 658         { 0x11d4, "Analog Devices" },
 659         { 0x13f6, "C-Media" },
 660         { 0x14f1, "Conexant" },
 661         { 0x17e8, "Chrontel" },
 662         { 0x1854, "LG" },
 663         { 0x1aec, "Wolfson Microelectronics" },
 664         { 0x1af4, "QEMU" },
 665         { 0x434d, "C-Media" },
 666         { 0x8086, "Intel" },
 667         { 0x8384, "SigmaTel" },
 668         {} /* terminator */
 669 };
 670
 671 /* store the codec vendor name */
 672 static int get_codec_vendor_name(struct hdac_device *codec)
 673 {
 674         const struct hda_vendor_id *c;
 675         u16 vendor_id = codec->vendor_id >> 16;
 676
 677         for (c = hda_vendor_ids; c->id; c++) {
 678                 if (c->id == vendor_id) {
 679                         codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
 680                         return codec->vendor_name ? 0 : -ENOMEM;
 681                 }
 682         }
 683
 684         codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
 685         return codec->vendor_name ? 0 : -ENOMEM;
 686 }
 687
 688 /*
 689  * stream formats
 690  */
 691 struct hda_rate_tbl {
 692         unsigned int hz;
 693         unsigned int alsa_bits;
 694         unsigned int hda_fmt;
 695 };
 696
 697 /* rate = base * mult / div */
 698 #define HDA_RATE(base, mult, div) \
 699         (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
 700          (((div) - 1) << AC_FMT_DIV_SHIFT))
 701
 702 static struct hda_rate_tbl rate_bits[] = {
 703         /* rate in Hz, ALSA rate bitmask, HDA format value */
 704
 705         /* autodetected value used in snd_hda_query_supported_pcm */
 706         { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
 707         { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
 708         { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
 709         { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
 710         { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
 711         { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
 712         { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
 713         { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
 714         { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
 715         { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
 716         { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
 717 #define AC_PAR_PCM_RATE_BITS    11
 718         /* up to bits 10, 384kHZ isn't supported properly */
 719
 720         /* not autodetected value */
 721         { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
 722
 723         { 0 } /* terminator */
 724 };
 725
 726 /**
 727  * snd_hdac_calc_stream_format - calculate the format bitset
 728  * @rate: the sample rate
 729  * @channels: the number of channels
 730  * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 731  * @maxbps: the max. bps
 732  * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
 733  *
 734  * Calculate the format bitset from the given rate, channels and th PCM format.
 735  *
 736  * Return zero if invalid.
 737  */
 738 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 739                                          unsigned int channels,
 740                                          unsigned int format,
 741                                          unsigned int maxbps,
 742                                          unsigned short spdif_ctls)
 743 {
 744         int i;
 745         unsigned int val = 0;
 746
 747         for (i = 0; rate_bits[i].hz; i++)
 748                 if (rate_bits[i].hz == rate) {
 749                         val = rate_bits[i].hda_fmt;
 750                         break;
 751                 }
 752         if (!rate_bits[i].hz)
 753                 return 0;
 754
 755         if (channels == 0 || channels > 8)
 756                 return 0;
 757         val |= channels - 1;
 758
 759         switch (snd_pcm_format_width(format)) {
 760         case 8:
 761                 val |= AC_FMT_BITS_8;
 762                 break;
 763         case 16:
 764                 val |= AC_FMT_BITS_16;
 765                 break;
 766         case 20:
 767         case 24:
 768         case 32:
 769                 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
 770                         val |= AC_FMT_BITS_32;
 771                 else if (maxbps >= 24)
 772                         val |= AC_FMT_BITS_24;
 773                 else
 774                         val |= AC_FMT_BITS_20;
 775                 break;
 776         default:
 777                 return 0;
 778         }
 779
 780         if (spdif_ctls & AC_DIG1_NONAUDIO)
 781                 val |= AC_FMT_TYPE_NON_PCM;
 782
 783         return val;
 784 }
 785 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
 786
 787 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
 788 {
 789         unsigned int val = 0;
 790
 791         if (nid != codec->afg &&
 792             (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
 793                 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
 794         if (!val || val == -1)
 795                 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
 796         if (!val || val == -1)
 797                 return 0;
 798         return val;
 799 }
 800
 801 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
 802 {
 803         unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
 804
 805         if (!streams || streams == -1)
 806                 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
 807         if (!streams || streams == -1)
 808                 return 0;
 809         return streams;
 810 }
 811
 812 /**
 813  * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
 814  * @codec: the codec object
 815  * @nid: NID to query
 816  * @ratesp: the pointer to store the detected rate bitflags
 817  * @formatsp: the pointer to store the detected formats
 818  * @bpsp: the pointer to store the detected format widths
 819  *
 820  * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 821  * or @bsps argument is ignored.
 822  *
 823  * Returns 0 if successful, otherwise a negative error code.
 824  */
 825 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 826                                  u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
 827 {
 828         unsigned int i, val, wcaps;
 829
 830         wcaps = get_wcaps(codec, nid);
 831         val = query_pcm_param(codec, nid);
 832
 833         if (ratesp) {
 834                 u32 rates = 0;
 835                 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
 836                         if (val & (1 << i))
 837                                 rates |= rate_bits[i].alsa_bits;
 838                 }
 839                 if (rates == 0) {
 840                         dev_err(&codec->dev,
 841                                 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
 842                                 nid, val,
 843                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
 844                         return -EIO;
 845                 }
 846                 *ratesp = rates;
 847         }
 848
 849         if (formatsp || bpsp) {
 850                 u64 formats = 0;
 851                 unsigned int streams, bps;
 852
 853                 streams = query_stream_param(codec, nid);
 854                 if (!streams)
 855                         return -EIO;
 856
 857                 bps = 0;
 858                 if (streams & AC_SUPFMT_PCM) {
 859                         if (val & AC_SUPPCM_BITS_8) {
 860                                 formats |= SNDRV_PCM_FMTBIT_U8;
 861                                 bps = 8;
 862                         }
 863                         if (val & AC_SUPPCM_BITS_16) {
 864                                 formats |= SNDRV_PCM_FMTBIT_S16_LE;
 865                                 bps = 16;
 866                         }
 867                         if (wcaps & AC_WCAP_DIGITAL) {
 868                                 if (val & AC_SUPPCM_BITS_32)
 869                                         formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
 870                                 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
 871                                         formats |= SNDRV_PCM_FMTBIT_S32_LE;
 872                                 if (val & AC_SUPPCM_BITS_24)
 873                                         bps = 24;
 874                                 else if (val & AC_SUPPCM_BITS_20)
 875                                         bps = 20;
 876                         } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
 877                                           AC_SUPPCM_BITS_32)) {
 878                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
 879                                 if (val & AC_SUPPCM_BITS_32)
 880                                         bps = 32;
 881                                 else if (val & AC_SUPPCM_BITS_24)
 882                                         bps = 24;
 883                                 else if (val & AC_SUPPCM_BITS_20)
 884                                         bps = 20;
 885                         }
 886                 }
 887 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
 888                 if (streams & AC_SUPFMT_FLOAT32) {
 889                         formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 890                         if (!bps)
 891                                 bps = 32;
 892                 }
 893 #endif
 894                 if (streams == AC_SUPFMT_AC3) {
 895                         /* should be exclusive */
 896                         /* temporary hack: we have still no proper support
 897                          * for the direct AC3 stream...
 898                          */
 899                         formats |= SNDRV_PCM_FMTBIT_U8;
 900                         bps = 8;
 901                 }
 902                 if (formats == 0) {
 903                         dev_err(&codec->dev,
 904                                 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
 905                                 nid, val,
 906                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
 907                                 streams);
 908                         return -EIO;
 909                 }
 910                 if (formatsp)
 911                         *formatsp = formats;
 912                 if (bpsp)
 913                         *bpsp = bps;
 914         }
 915
 916         return 0;
 917 }
 918 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
 919
 920 /**
 921  * snd_hdac_is_supported_format - Check the validity of the format
 922  * @codec: the codec object
 923  * @nid: NID to check
 924  * @format: the HD-audio format value to check
 925  *
 926  * Check whether the given node supports the format value.
 927  *
 928  * Returns true if supported, false if not.
 929  */
 930 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 931                                   unsigned int format)
 932 {
 933         int i;
 934         unsigned int val = 0, rate, stream;
 935
 936         val = query_pcm_param(codec, nid);
 937         if (!val)
 938                 return false;
 939
 940         rate = format & 0xff00;
 941         for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
 942                 if (rate_bits[i].hda_fmt == rate) {
 943                         if (val & (1 << i))
 944                                 break;
 945                         return false;
 946                 }
 947         if (i >= AC_PAR_PCM_RATE_BITS)
 948                 return false;
 949
 950         stream = query_stream_param(codec, nid);
 951         if (!stream)
 952                 return false;
 953
 954         if (stream & AC_SUPFMT_PCM) {
 955                 switch (format & 0xf0) {
 956                 case 0x00:
 957                         if (!(val & AC_SUPPCM_BITS_8))
 958                                 return false;
 959                         break;
 960                 case 0x10:
 961                         if (!(val & AC_SUPPCM_BITS_16))
 962                                 return false;
 963                         break;
 964                 case 0x20:
 965                         if (!(val & AC_SUPPCM_BITS_20))
 966                                 return false;
 967                         break;
 968                 case 0x30:
 969                         if (!(val & AC_SUPPCM_BITS_24))
 970                                 return false;
 971                         break;
 972                 case 0x40:
 973                         if (!(val & AC_SUPPCM_BITS_32))
 974                                 return false;
 975                         break;
 976                 default:
 977                         return false;
 978                 }
 979         } else {
 980                 /* FIXME: check for float32 and AC3? */
 981         }
 982
 983         return true;
 984 }
 985 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
 986
 987 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
 988                         int flags, unsigned int verb, unsigned int parm)
 989 {
 990         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
 991         unsigned int res;
 992
 993         if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
 994                 return -1;
 995
 996         return res;
 997 }
 998
 999 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
1000                         int flags, unsigned int verb, unsigned int parm)
1001 {
1002         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1003
1004         return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
1005 }
1006
1007 /**
1008  * snd_hdac_codec_read - send a command and get the response
1009  * @hdac: the HDAC device
1010  * @nid: NID to send the command
1011  * @flags: optional bit flags
1012  * @verb: the verb to send
1013  * @parm: the parameter for the verb
1014  *
1015  * Send a single command and read the corresponding response.
1016  *
1017  * Returns the obtained response value, or -1 for an error.
1018  */
1019 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1020                         int flags, unsigned int verb, unsigned int parm)
1021 {
1022         return codec_read(hdac, nid, flags, verb, parm);
1023 }
1024 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1025
1026 /**
1027  * snd_hdac_codec_write - send a single command without waiting for response
1028  * @hdac: the HDAC device
1029  * @nid: NID to send the command
1030  * @flags: optional bit flags
1031  * @verb: the verb to send
1032  * @parm: the parameter for the verb
1033  *
1034  * Send a single command without waiting for response.
1035  *
1036  * Returns 0 if successful, or a negative error code.
1037  */
1038 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1039                         int flags, unsigned int verb, unsigned int parm)
1040 {
1041         return codec_write(hdac, nid, flags, verb, parm);
1042 }
1043 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1044
1045 /**
1046  * snd_hdac_check_power_state - check whether the actual power state matches
1047  * with the target state
1048  *
1049  * @hdac: the HDAC device
1050  * @nid: NID to send the command
1051  * @target_state: target state to check for
1052  *
1053  * Return true if state matches, false if not
1054  */
1055 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1056                 hda_nid_t nid, unsigned int target_state)
1057 {
1058         unsigned int state = codec_read(hdac, nid, 0,
1059                                 AC_VERB_GET_POWER_STATE, 0);
1060
1061         if (state & AC_PWRST_ERROR)
1062                 return true;
1063         state = (state >> 4) & 0x0f;
1064         return (state == target_state);
1065 }
1066 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);