sound/hda/hdac_device.c

   1 /*
   2  * HD-audio codec core device
   3  */
   4
   5 #include <linux/init.h>
   6 #include <linux/delay.h>
   7 #include <linux/device.h>
   8 #include <linux/slab.h>
   9 #include <linux/module.h>
  10 #include <linux/export.h>
  11 #include <linux/pm_runtime.h>
  12 #include <sound/hdaudio.h>
  13 #include <sound/hda_regmap.h>
  14 #include <sound/pcm.h>
  15 #include "local.h"
  16
  17 static void setup_fg_nodes(struct hdac_device *codec);
  18 static int get_codec_vendor_name(struct hdac_device *codec);
  19
  20 static void default_release(struct device *dev)
  21 {
  22         snd_hdac_device_exit(container_of(dev, struct hdac_device, dev));
  23 }
  24
  25 /**
  26  * snd_hdac_device_init - initialize the HD-audio codec base device
  27  * @codec: device to initialize
  28  * @bus: but to attach
  29  * @name: device name string
  30  * @addr: codec address
  31  *
  32  * Returns zero for success or a negative error code.
  33  *
  34  * This function increments the runtime PM counter and marks it active.
  35  * The caller needs to turn it off appropriately later.
  36  *
  37  * The caller needs to set the device's release op properly by itself.
  38  */
  39 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
  40                          const char *name, unsigned int addr)
  41 {
  42         struct device *dev;
  43         hda_nid_t fg;
  44         int err;
  45
  46         dev = &codec->dev;
  47         device_initialize(dev);
  48         dev->parent = bus->dev;
  49         dev->bus = &snd_hda_bus_type;
  50         dev->release = default_release;
  51         dev->groups = hdac_dev_attr_groups;
  52         dev_set_name(dev, "%s", name);
  53         device_enable_async_suspend(dev);
  54
  55         codec->bus = bus;
  56         codec->addr = addr;
  57         codec->type = HDA_DEV_CORE;
  58         pm_runtime_set_active(&codec->dev);
  59         pm_runtime_get_noresume(&codec->dev);
  60         atomic_set(&codec->in_pm, 0);
  61
  62         err = snd_hdac_bus_add_device(bus, codec);
  63         if (err < 0)
  64                 goto error;
  65
  66         /* fill parameters */
  67         codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  68                                               AC_PAR_VENDOR_ID);
  69         if (codec->vendor_id == -1) {
  70                 /* read again, hopefully the access method was corrected
  71                  * in the last read...
  72                  */
  73                 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  74                                                       AC_PAR_VENDOR_ID);
  75         }
  76
  77         codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  78                                                  AC_PAR_SUBSYSTEM_ID);
  79         codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  80                                                 AC_PAR_REV_ID);
  81
  82         setup_fg_nodes(codec);
  83         if (!codec->afg && !codec->mfg) {
  84                 dev_err(dev, "no AFG or MFG node found\n");
  85                 err = -ENODEV;
  86                 goto error;
  87         }
  88
  89         fg = codec->afg ? codec->afg : codec->mfg;
  90
  91         err = snd_hdac_refresh_widgets(codec, false);
  92         if (err < 0)
  93                 goto error;
  94
  95         codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
  96         /* reread ssid if not set by parameter */
  97         if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
  98                 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
  99                               &codec->subsystem_id);
 100
 101         err = get_codec_vendor_name(codec);
 102         if (err < 0)
 103                 goto error;
 104
 105         codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
 106                                      codec->vendor_id & 0xffff);
 107         if (!codec->chip_name) {
 108                 err = -ENOMEM;
 109                 goto error;
 110         }
 111
 112         return 0;
 113
 114  error:
 115         put_device(&codec->dev);
 116         return err;
 117 }
 118 EXPORT_SYMBOL_GPL(snd_hdac_device_init);
 119
 120 /**
 121  * snd_hdac_device_exit - clean up the HD-audio codec base device
 122  * @codec: device to clean up
 123  */
 124 void snd_hdac_device_exit(struct hdac_device *codec)
 125 {
 126         pm_runtime_put_noidle(&codec->dev);
 127         snd_hdac_bus_remove_device(codec->bus, codec);
 128         kfree(codec->vendor_name);
 129         kfree(codec->chip_name);
 130 }
 131 EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
 132
 133 /**
 134  * snd_hdac_device_register - register the hd-audio codec base device
 135  * codec: the device to register
 136  */
 137 int snd_hdac_device_register(struct hdac_device *codec)
 138 {
 139         int err;
 140
 141         err = device_add(&codec->dev);
 142         if (err < 0)
 143                 return err;
 144         err = hda_widget_sysfs_init(codec);
 145         if (err < 0) {
 146                 device_del(&codec->dev);
 147                 return err;
 148         }
 149
 150         return 0;
 151 }
 152 EXPORT_SYMBOL_GPL(snd_hdac_device_register);
 153
 154 /**
 155  * snd_hdac_device_unregister - unregister the hd-audio codec base device
 156  * codec: the device to unregister
 157  */
 158 void snd_hdac_device_unregister(struct hdac_device *codec)
 159 {
 160         if (device_is_registered(&codec->dev)) {
 161                 hda_widget_sysfs_exit(codec);
 162                 device_del(&codec->dev);
 163                 snd_hdac_bus_remove_device(codec->bus, codec);
 164         }
 165 }
 166 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
 167
 168 /**
 169  * snd_hdac_device_set_chip_name - set/update the codec name
 170  * @codec: the HDAC device
 171  * @name: name string to set
 172  *
 173  * Returns 0 if the name is set or updated, or a negative error code.
 174  */
 175 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
 176 {
 177         char *newname;
 178
 179         if (!name)
 180                 return 0;
 181         newname = kstrdup(name, GFP_KERNEL);
 182         if (!newname)
 183                 return -ENOMEM;
 184         kfree(codec->chip_name);
 185         codec->chip_name = newname;
 186         return 0;
 187 }
 188 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
 189
 190 /**
 191  * snd_hdac_codec_modalias - give the module alias name
 192  * @codec: HDAC device
 193  * @buf: string buffer to store
 194  * @size: string buffer size
 195  *
 196  * Returns the size of string, like snprintf(), or a negative error code.
 197  */
 198 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
 199 {
 200         return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
 201                         codec->vendor_id, codec->revision_id, codec->type);
 202 }
 203 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
 204
 205 /**
 206  * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
 207  *      HD-audio controller
 208  * @codec: the codec object
 209  * @nid: NID to encode
 210  * @verb: verb to encode
 211  * @parm: parameter to encode
 212  *
 213  * Return an encoded command verb or -1 for error.
 214  */
 215 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
 216                                unsigned int verb, unsigned int parm)
 217 {
 218         u32 val, addr;
 219
 220         addr = codec->addr;
 221         if ((addr & ~0xf) || (nid & ~0x7f) ||
 222             (verb & ~0xfff) || (parm & ~0xffff)) {
 223                 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
 224                         addr, nid, verb, parm);
 225                 return -1;
 226         }
 227
 228         val = addr << 28;
 229         val |= (u32)nid << 20;
 230         val |= verb << 8;
 231         val |= parm;
 232         return val;
 233 }
 234 EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
 235
 236 /**
 237  * snd_hdac_exec_verb - execute an encoded verb
 238  * @codec: the codec object
 239  * @cmd: encoded verb to execute
 240  * @flags: optional flags, pass zero for default
 241  * @res: the pointer to store the result, NULL if running async
 242  *
 243  * Returns zero if successful, or a negative error code.
 244  *
 245  * This calls the exec_verb op when set in hdac_codec.  If not,
 246  * call the default snd_hdac_bus_exec_verb().
 247  */
 248 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
 249                        unsigned int flags, unsigned int *res)
 250 {
 251         if (codec->exec_verb)
 252                 return codec->exec_verb(codec, cmd, flags, res);
 253         return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
 254 }
 255 EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
 256
 257
 258 /**
 259  * snd_hdac_read - execute a verb
 260  * @codec: the codec object
 261  * @nid: NID to execute a verb
 262  * @verb: verb to execute
 263  * @parm: parameter for a verb
 264  * @res: the pointer to store the result, NULL if running async
 265  *
 266  * Returns zero if successful, or a negative error code.
 267  */
 268 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
 269                   unsigned int verb, unsigned int parm, unsigned int *res)
 270 {
 271         unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
 272
 273         return snd_hdac_exec_verb(codec, cmd, 0, res);
 274 }
 275 EXPORT_SYMBOL_GPL(snd_hdac_read);
 276
 277 /**
 278  * _snd_hdac_read_parm - read a parmeter
 279  *
 280  * This function returns zero or an error unlike snd_hdac_read_parm().
 281  */
 282 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
 283                         unsigned int *res)
 284 {
 285         unsigned int cmd;
 286
 287         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 288         return snd_hdac_regmap_read_raw(codec, cmd, res);
 289 }
 290 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
 291
 292 /**
 293  * snd_hdac_read_parm_uncached - read a codec parameter without caching
 294  * @codec: the codec object
 295  * @nid: NID to read a parameter
 296  * @parm: parameter to read
 297  *
 298  * Returns -1 for error.  If you need to distinguish the error more
 299  * strictly, use snd_hdac_read() directly.
 300  */
 301 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
 302                                 int parm)
 303 {
 304         unsigned int cmd, val;
 305
 306         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 307         if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
 308                 return -1;
 309         return val;
 310 }
 311 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
 312
 313 /**
 314  * snd_hdac_override_parm - override read-only parameters
 315  * @codec: the codec object
 316  * @nid: NID for the parameter
 317  * @parm: the parameter to change
 318  * @val: the parameter value to overwrite
 319  */
 320 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
 321                            unsigned int parm, unsigned int val)
 322 {
 323         unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
 324         int err;
 325
 326         if (!codec->regmap)
 327                 return -EINVAL;
 328
 329         codec->caps_overwriting = true;
 330         err = snd_hdac_regmap_write_raw(codec, verb, val);
 331         codec->caps_overwriting = false;
 332         return err;
 333 }
 334 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
 335
 336 /**
 337  * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
 338  * @codec: the codec object
 339  * @nid: NID to inspect
 340  * @start_id: the pointer to store the starting NID
 341  *
 342  * Returns the number of subtree nodes or zero if not found.
 343  * This function reads parameters always without caching.
 344  */
 345 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 346                            hda_nid_t *start_id)
 347 {
 348         unsigned int parm;
 349
 350         parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
 351         if (parm == -1) {
 352                 *start_id = 0;
 353                 return 0;
 354         }
 355         *start_id = (parm >> 16) & 0x7fff;
 356         return (int)(parm & 0x7fff);
 357 }
 358 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
 359
 360 /*
 361  * look for an AFG and MFG nodes
 362  */
 363 static void setup_fg_nodes(struct hdac_device *codec)
 364 {
 365         int i, total_nodes, function_id;
 366         hda_nid_t nid;
 367
 368         total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
 369         for (i = 0; i < total_nodes; i++, nid++) {
 370                 function_id = snd_hdac_read_parm(codec, nid,
 371                                                  AC_PAR_FUNCTION_TYPE);
 372                 switch (function_id & 0xff) {
 373                 case AC_GRP_AUDIO_FUNCTION:
 374                         codec->afg = nid;
 375                         codec->afg_function_id = function_id & 0xff;
 376                         codec->afg_unsol = (function_id >> 8) & 1;
 377                         break;
 378                 case AC_GRP_MODEM_FUNCTION:
 379                         codec->mfg = nid;
 380                         codec->mfg_function_id = function_id & 0xff;
 381                         codec->mfg_unsol = (function_id >> 8) & 1;
 382                         break;
 383                 default:
 384                         break;
 385                 }
 386         }
 387 }
 388
 389 /**
 390  * snd_hdac_refresh_widgets - Reset the widget start/end nodes
 391  * @codec: the codec object
 392  * @sysfs: re-initialize sysfs tree, too
 393  */
 394 int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs)
 395 {
 396         hda_nid_t start_nid;
 397         int nums, err;
 398
 399         nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
 400         if (!start_nid || nums <= 0 || nums >= 0xff) {
 401                 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
 402                         codec->afg);
 403                 return -EINVAL;
 404         }
 405
 406         if (sysfs) {
 407                 err = hda_widget_sysfs_reinit(codec, start_nid, nums);
 408                 if (err < 0)
 409                         return err;
 410         }
 411
 412         codec->num_nodes = nums;
 413         codec->start_nid = start_nid;
 414         codec->end_nid = start_nid + nums;
 415         return 0;
 416 }
 417 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
 418
 419 /* return CONNLIST_LEN parameter of the given widget */
 420 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
 421 {
 422         unsigned int wcaps = get_wcaps(codec, nid);
 423         unsigned int parm;
 424
 425         if (!(wcaps & AC_WCAP_CONN_LIST) &&
 426             get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
 427                 return 0;
 428
 429         parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
 430         if (parm == -1)
 431                 parm = 0;
 432         return parm;
 433 }
 434
 435 /**
 436  * snd_hdac_get_connections - get a widget connection list
 437  * @codec: the codec object
 438  * @nid: NID
 439  * @conn_list: the array to store the results, can be NULL
 440  * @max_conns: the max size of the given array
 441  *
 442  * Returns the number of connected widgets, zero for no connection, or a
 443  * negative error code.  When the number of elements don't fit with the
 444  * given array size, it returns -ENOSPC.
 445  *
 446  * When @conn_list is NULL, it just checks the number of connections.
 447  */
 448 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 449                              hda_nid_t *conn_list, int max_conns)
 450 {
 451         unsigned int parm;
 452         int i, conn_len, conns, err;
 453         unsigned int shift, num_elems, mask;
 454         hda_nid_t prev_nid;
 455         int null_count = 0;
 456
 457         parm = get_num_conns(codec, nid);
 458         if (!parm)
 459                 return 0;
 460
 461         if (parm & AC_CLIST_LONG) {
 462                 /* long form */
 463                 shift = 16;
 464                 num_elems = 2;
 465         } else {
 466                 /* short form */
 467                 shift = 8;
 468                 num_elems = 4;
 469         }
 470         conn_len = parm & AC_CLIST_LENGTH;
 471         mask = (1 << (shift-1)) - 1;
 472
 473         if (!conn_len)
 474                 return 0; /* no connection */
 475
 476         if (conn_len == 1) {
 477                 /* single connection */
 478                 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
 479                                     &parm);
 480                 if (err < 0)
 481                         return err;
 482                 if (conn_list)
 483                         conn_list[0] = parm & mask;
 484                 return 1;
 485         }
 486
 487         /* multi connection */
 488         conns = 0;
 489         prev_nid = 0;
 490         for (i = 0; i < conn_len; i++) {
 491                 int range_val;
 492                 hda_nid_t val, n;
 493
 494                 if (i % num_elems == 0) {
 495                         err = snd_hdac_read(codec, nid,
 496                                             AC_VERB_GET_CONNECT_LIST, i,
 497                                             &parm);
 498                         if (err < 0)
 499                                 return -EIO;
 500                 }
 501                 range_val = !!(parm & (1 << (shift-1))); /* ranges */
 502                 val = parm & mask;
 503                 if (val == 0 && null_count++) {  /* no second chance */
 504                         dev_dbg(&codec->dev,
 505                                 "invalid CONNECT_LIST verb %x[%i]:%x\n",
 506                                 nid, i, parm);
 507                         return 0;
 508                 }
 509                 parm >>= shift;
 510                 if (range_val) {
 511                         /* ranges between the previous and this one */
 512                         if (!prev_nid || prev_nid >= val) {
 513                                 dev_warn(&codec->dev,
 514                                          "invalid dep_range_val %x:%x\n",
 515                                          prev_nid, val);
 516                                 continue;
 517                         }
 518                         for (n = prev_nid + 1; n <= val; n++) {
 519                                 if (conn_list) {
 520                                         if (conns >= max_conns)
 521                                                 return -ENOSPC;
 522                                         conn_list[conns] = n;
 523                                 }
 524                                 conns++;
 525                         }
 526                 } else {
 527                         if (conn_list) {
 528                                 if (conns >= max_conns)
 529                                         return -ENOSPC;
 530                                 conn_list[conns] = val;
 531                         }
 532                         conns++;
 533                 }
 534                 prev_nid = val;
 535         }
 536         return conns;
 537 }
 538 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
 539
 540 #ifdef CONFIG_PM
 541 /**
 542  * snd_hdac_power_up - power up the codec
 543  * @codec: the codec object
 544  *
 545  * This function calls the runtime PM helper to power up the given codec.
 546  * Unlike snd_hdac_power_up_pm(), you should call this only for the code
 547  * path that isn't included in PM path.  Otherwise it gets stuck.
 548  *
 549  * Returns zero if successful, or a negative error code.
 550  */
 551 int snd_hdac_power_up(struct hdac_device *codec)
 552 {
 553         return pm_runtime_get_sync(&codec->dev);
 554 }
 555 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
 556
 557 /**
 558  * snd_hdac_power_down - power down the codec
 559  * @codec: the codec object
 560  *
 561  * Returns zero if successful, or a negative error code.
 562  */
 563 int snd_hdac_power_down(struct hdac_device *codec)
 564 {
 565         struct device *dev = &codec->dev;
 566
 567         pm_runtime_mark_last_busy(dev);
 568         return pm_runtime_put_autosuspend(dev);
 569 }
 570 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
 571
 572 /**
 573  * snd_hdac_power_up_pm - power up the codec
 574  * @codec: the codec object
 575  *
 576  * This function can be called in a recursive code path like init code
 577  * which may be called by PM suspend/resume again.  OTOH, if a power-up
 578  * call must wake up the sleeper (e.g. in a kctl callback), use
 579  * snd_hdac_power_up() instead.
 580  *
 581  * Returns zero if successful, or a negative error code.
 582  */
 583 int snd_hdac_power_up_pm(struct hdac_device *codec)
 584 {
 585         if (!atomic_inc_not_zero(&codec->in_pm))
 586                 return snd_hdac_power_up(codec);
 587         return 0;
 588 }
 589 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
 590
 591 /* like snd_hdac_power_up_pm(), but only increment the pm count when
 592  * already powered up.  Returns -1 if not powered up, 1 if incremented
 593  * or 0 if unchanged.  Only used in hdac_regmap.c
 594  */
 595 int snd_hdac_keep_power_up(struct hdac_device *codec)
 596 {
 597         if (!atomic_inc_not_zero(&codec->in_pm)) {
 598                 int ret = pm_runtime_get_if_in_use(&codec->dev);
 599                 if (!ret)
 600                         return -1;
 601                 if (ret < 0)
 602                         return 0;
 603         }
 604         return 1;
 605 }
 606
 607 /**
 608  * snd_hdac_power_down_pm - power down the codec
 609  * @codec: the codec object
 610  *
 611  * Like snd_hdac_power_up_pm(), this function is used in a recursive
 612  * code path like init code which may be called by PM suspend/resume again.
 613  *
 614  * Returns zero if successful, or a negative error code.
 615  */
 616 int snd_hdac_power_down_pm(struct hdac_device *codec)
 617 {
 618         if (atomic_dec_if_positive(&codec->in_pm) < 0)
 619                 return snd_hdac_power_down(codec);
 620         return 0;
 621 }
 622 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
 623 #endif
 624
 625 /* codec vendor labels */
 626 struct hda_vendor_id {
 627         unsigned int id;
 628         const char *name;
 629 };
 630
 631 static struct hda_vendor_id hda_vendor_ids[] = {
 632         { 0x1002, "ATI" },
 633         { 0x1013, "Cirrus Logic" },
 634         { 0x1057, "Motorola" },
 635         { 0x1095, "Silicon Image" },
 636         { 0x10de, "Nvidia" },
 637         { 0x10ec, "Realtek" },
 638         { 0x1102, "Creative" },
 639         { 0x1106, "VIA" },
 640         { 0x111d, "IDT" },
 641         { 0x11c1, "LSI" },
 642         { 0x11d4, "Analog Devices" },
 643         { 0x13f6, "C-Media" },
 644         { 0x14f1, "Conexant" },
 645         { 0x17e8, "Chrontel" },
 646         { 0x1854, "LG" },
 647         { 0x1aec, "Wolfson Microelectronics" },
 648         { 0x1af4, "QEMU" },
 649         { 0x434d, "C-Media" },
 650         { 0x8086, "Intel" },
 651         { 0x8384, "SigmaTel" },
 652         {} /* terminator */
 653 };
 654
 655 /* store the codec vendor name */
 656 static int get_codec_vendor_name(struct hdac_device *codec)
 657 {
 658         const struct hda_vendor_id *c;
 659         u16 vendor_id = codec->vendor_id >> 16;
 660
 661         for (c = hda_vendor_ids; c->id; c++) {
 662                 if (c->id == vendor_id) {
 663                         codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
 664                         return codec->vendor_name ? 0 : -ENOMEM;
 665                 }
 666         }
 667
 668         codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
 669         return codec->vendor_name ? 0 : -ENOMEM;
 670 }
 671
 672 /*
 673  * stream formats
 674  */
 675 struct hda_rate_tbl {
 676         unsigned int hz;
 677         unsigned int alsa_bits;
 678         unsigned int hda_fmt;
 679 };
 680
 681 /* rate = base * mult / div */
 682 #define HDA_RATE(base, mult, div) \
 683         (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
 684          (((div) - 1) << AC_FMT_DIV_SHIFT))
 685
 686 static struct hda_rate_tbl rate_bits[] = {
 687         /* rate in Hz, ALSA rate bitmask, HDA format value */
 688
 689         /* autodetected value used in snd_hda_query_supported_pcm */
 690         { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
 691         { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
 692         { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
 693         { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
 694         { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
 695         { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
 696         { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
 697         { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
 698         { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
 699         { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
 700         { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
 701 #define AC_PAR_PCM_RATE_BITS    11
 702         /* up to bits 10, 384kHZ isn't supported properly */
 703
 704         /* not autodetected value */
 705         { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
 706
 707         { 0 } /* terminator */
 708 };
 709
 710 /**
 711  * snd_hdac_calc_stream_format - calculate the format bitset
 712  * @rate: the sample rate
 713  * @channels: the number of channels
 714  * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 715  * @maxbps: the max. bps
 716  * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
 717  *
 718  * Calculate the format bitset from the given rate, channels and th PCM format.
 719  *
 720  * Return zero if invalid.
 721  */
 722 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 723                                          unsigned int channels,
 724                                          snd_pcm_format_t format,
 725                                          unsigned int maxbps,
 726                                          unsigned short spdif_ctls)
 727 {
 728         int i;
 729         unsigned int val = 0;
 730
 731         for (i = 0; rate_bits[i].hz; i++)
 732                 if (rate_bits[i].hz == rate) {
 733                         val = rate_bits[i].hda_fmt;
 734                         break;
 735                 }
 736         if (!rate_bits[i].hz)
 737                 return 0;
 738
 739         if (channels == 0 || channels > 8)
 740                 return 0;
 741         val |= channels - 1;
 742
 743         switch (snd_pcm_format_width(format)) {
 744         case 8:
 745                 val |= AC_FMT_BITS_8;
 746                 break;
 747         case 16:
 748                 val |= AC_FMT_BITS_16;
 749                 break;
 750         case 20:
 751         case 24:
 752         case 32:
 753                 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
 754                         val |= AC_FMT_BITS_32;
 755                 else if (maxbps >= 24)
 756                         val |= AC_FMT_BITS_24;
 757                 else
 758                         val |= AC_FMT_BITS_20;
 759                 break;
 760         default:
 761                 return 0;
 762         }
 763
 764         if (spdif_ctls & AC_DIG1_NONAUDIO)
 765                 val |= AC_FMT_TYPE_NON_PCM;
 766
 767         return val;
 768 }
 769 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
 770
 771 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
 772 {
 773         unsigned int val = 0;
 774
 775         if (nid != codec->afg &&
 776             (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
 777                 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
 778         if (!val || val == -1)
 779                 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
 780         if (!val || val == -1)
 781                 return 0;
 782         return val;
 783 }
 784
 785 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
 786 {
 787         unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
 788
 789         if (!streams || streams == -1)
 790                 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
 791         if (!streams || streams == -1)
 792                 return 0;
 793         return streams;
 794 }
 795
 796 /**
 797  * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
 798  * @codec: the codec object
 799  * @nid: NID to query
 800  * @ratesp: the pointer to store the detected rate bitflags
 801  * @formatsp: the pointer to store the detected formats
 802  * @bpsp: the pointer to store the detected format widths
 803  *
 804  * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 805  * or @bsps argument is ignored.
 806  *
 807  * Returns 0 if successful, otherwise a negative error code.
 808  */
 809 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 810                                  u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
 811 {
 812         unsigned int i, val, wcaps;
 813
 814         wcaps = get_wcaps(codec, nid);
 815         val = query_pcm_param(codec, nid);
 816
 817         if (ratesp) {
 818                 u32 rates = 0;
 819                 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
 820                         if (val & (1 << i))
 821                                 rates |= rate_bits[i].alsa_bits;
 822                 }
 823                 if (rates == 0) {
 824                         dev_err(&codec->dev,
 825                                 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
 826                                 nid, val,
 827                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
 828                         return -EIO;
 829                 }
 830                 *ratesp = rates;
 831         }
 832
 833         if (formatsp || bpsp) {
 834                 u64 formats = 0;
 835                 unsigned int streams, bps;
 836
 837                 streams = query_stream_param(codec, nid);
 838                 if (!streams)
 839                         return -EIO;
 840
 841                 bps = 0;
 842                 if (streams & AC_SUPFMT_PCM) {
 843                         if (val & AC_SUPPCM_BITS_8) {
 844                                 formats |= SNDRV_PCM_FMTBIT_U8;
 845                                 bps = 8;
 846                         }
 847                         if (val & AC_SUPPCM_BITS_16) {
 848                                 formats |= SNDRV_PCM_FMTBIT_S16_LE;
 849                                 bps = 16;
 850                         }
 851                         if (wcaps & AC_WCAP_DIGITAL) {
 852                                 if (val & AC_SUPPCM_BITS_32)
 853                                         formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
 854                                 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
 855                                         formats |= SNDRV_PCM_FMTBIT_S32_LE;
 856                                 if (val & AC_SUPPCM_BITS_24)
 857                                         bps = 24;
 858                                 else if (val & AC_SUPPCM_BITS_20)
 859                                         bps = 20;
 860                         } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
 861                                           AC_SUPPCM_BITS_32)) {
 862                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
 863                                 if (val & AC_SUPPCM_BITS_32)
 864                                         bps = 32;
 865                                 else if (val & AC_SUPPCM_BITS_24)
 866                                         bps = 24;
 867                                 else if (val & AC_SUPPCM_BITS_20)
 868                                         bps = 20;
 869                         }
 870                 }
 871 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
 872                 if (streams & AC_SUPFMT_FLOAT32) {
 873                         formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 874                         if (!bps)
 875                                 bps = 32;
 876                 }
 877 #endif
 878                 if (streams == AC_SUPFMT_AC3) {
 879                         /* should be exclusive */
 880                         /* temporary hack: we have still no proper support
 881                          * for the direct AC3 stream...
 882                          */
 883                         formats |= SNDRV_PCM_FMTBIT_U8;
 884                         bps = 8;
 885                 }
 886                 if (formats == 0) {
 887                         dev_err(&codec->dev,
 888                                 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
 889                                 nid, val,
 890                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
 891                                 streams);
 892                         return -EIO;
 893                 }
 894                 if (formatsp)
 895                         *formatsp = formats;
 896                 if (bpsp)
 897                         *bpsp = bps;
 898         }
 899
 900         return 0;
 901 }
 902 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
 903
 904 /**
 905  * snd_hdac_is_supported_format - Check the validity of the format
 906  * @codec: the codec object
 907  * @nid: NID to check
 908  * @format: the HD-audio format value to check
 909  *
 910  * Check whether the given node supports the format value.
 911  *
 912  * Returns true if supported, false if not.
 913  */
 914 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 915                                   unsigned int format)
 916 {
 917         int i;
 918         unsigned int val = 0, rate, stream;
 919
 920         val = query_pcm_param(codec, nid);
 921         if (!val)
 922                 return false;
 923
 924         rate = format & 0xff00;
 925         for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
 926                 if (rate_bits[i].hda_fmt == rate) {
 927                         if (val & (1 << i))
 928                                 break;
 929                         return false;
 930                 }
 931         if (i >= AC_PAR_PCM_RATE_BITS)
 932                 return false;
 933
 934         stream = query_stream_param(codec, nid);
 935         if (!stream)
 936                 return false;
 937
 938         if (stream & AC_SUPFMT_PCM) {
 939                 switch (format & 0xf0) {
 940                 case 0x00:
 941                         if (!(val & AC_SUPPCM_BITS_8))
 942                                 return false;
 943                         break;
 944                 case 0x10:
 945                         if (!(val & AC_SUPPCM_BITS_16))
 946                                 return false;
 947                         break;
 948                 case 0x20:
 949                         if (!(val & AC_SUPPCM_BITS_20))
 950                                 return false;
 951                         break;
 952                 case 0x30:
 953                         if (!(val & AC_SUPPCM_BITS_24))
 954                                 return false;
 955                         break;
 956                 case 0x40:
 957                         if (!(val & AC_SUPPCM_BITS_32))
 958                                 return false;
 959                         break;
 960                 default:
 961                         return false;
 962                 }
 963         } else {
 964                 /* FIXME: check for float32 and AC3? */
 965         }
 966
 967         return true;
 968 }
 969 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
 970
 971 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
 972                         int flags, unsigned int verb, unsigned int parm)
 973 {
 974         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
 975         unsigned int res;
 976
 977         if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
 978                 return -1;
 979
 980         return res;
 981 }
 982
 983 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
 984                         int flags, unsigned int verb, unsigned int parm)
 985 {
 986         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
 987
 988         return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
 989 }
 990
 991 /**
 992  * snd_hdac_codec_read - send a command and get the response
 993  * @hdac: the HDAC device
 994  * @nid: NID to send the command
 995  * @flags: optional bit flags
 996  * @verb: the verb to send
 997  * @parm: the parameter for the verb
 998  *
 999  * Send a single command and read the corresponding response.
1000  *
1001  * Returns the obtained response value, or -1 for an error.
1002  */
1003 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1004                         int flags, unsigned int verb, unsigned int parm)
1005 {
1006         return codec_read(hdac, nid, flags, verb, parm);
1007 }
1008 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1009
1010 /**
1011  * snd_hdac_codec_write - send a single command without waiting for response
1012  * @hdac: the HDAC device
1013  * @nid: NID to send the command
1014  * @flags: optional bit flags
1015  * @verb: the verb to send
1016  * @parm: the parameter for the verb
1017  *
1018  * Send a single command without waiting for response.
1019  *
1020  * Returns 0 if successful, or a negative error code.
1021  */
1022 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1023                         int flags, unsigned int verb, unsigned int parm)
1024 {
1025         return codec_write(hdac, nid, flags, verb, parm);
1026 }
1027 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1028
1029 /**
1030  * snd_hdac_check_power_state - check whether the actual power state matches
1031  * with the target state
1032  *
1033  * @hdac: the HDAC device
1034  * @nid: NID to send the command
1035  * @target_state: target state to check for
1036  *
1037  * Return true if state matches, false if not
1038  */
1039 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1040                 hda_nid_t nid, unsigned int target_state)
1041 {
1042         unsigned int state = codec_read(hdac, nid, 0,
1043                                 AC_VERB_GET_POWER_STATE, 0);
1044
1045         if (state & AC_PWRST_ERROR)
1046                 return true;
1047         state = (state >> 4) & 0x0f;
1048         return (state == target_state);
1049 }
1050 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
1051 /**
1052  * snd_hdac_sync_power_state - wait until actual power state matches
1053  * with the target state
1054  *
1055  * @hdac: the HDAC device
1056  * @nid: NID to send the command
1057  * @target_state: target state to check for
1058  *
1059  * Return power state or PS_ERROR if codec rejects GET verb.
1060  */
1061 unsigned int snd_hdac_sync_power_state(struct hdac_device *codec,
1062                         hda_nid_t nid, unsigned int power_state)
1063 {
1064         unsigned long end_time = jiffies + msecs_to_jiffies(500);
1065         unsigned int state, actual_state, count;
1066
1067         for (count = 0; count < 500; count++) {
1068                 state = snd_hdac_codec_read(codec, nid, 0,
1069                                 AC_VERB_GET_POWER_STATE, 0);
1070                 if (state & AC_PWRST_ERROR) {
1071                         msleep(20);
1072                         break;
1073                 }
1074                 actual_state = (state >> 4) & 0x0f;
1075                 if (actual_state == power_state)
1076                         break;
1077                 if (time_after_eq(jiffies, end_time))
1078                         break;
1079                 /* wait until the codec reachs to the target state */
1080                 msleep(1);
1081         }
1082         return state;
1083 }
1084 EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state);