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);
  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         }
 163 }
 164 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
 165
 166 /**
 167  * snd_hdac_device_set_chip_name - set/update the codec name
 168  * @codec: the HDAC device
 169  * @name: name string to set
 170  *
 171  * Returns 0 if the name is set or updated, or a negative error code.
 172  */
 173 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
 174 {
 175         char *newname;
 176
 177         if (!name)
 178                 return 0;
 179         newname = kstrdup(name, GFP_KERNEL);
 180         if (!newname)
 181                 return -ENOMEM;
 182         kfree(codec->chip_name);
 183         codec->chip_name = newname;
 184         return 0;
 185 }
 186 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
 187
 188 /**
 189  * snd_hdac_codec_modalias - give the module alias name
 190  * @codec: HDAC device
 191  * @buf: string buffer to store
 192  * @size: string buffer size
 193  *
 194  * Returns the size of string, like snprintf(), or a negative error code.
 195  */
 196 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
 197 {
 198         return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
 199                         codec->vendor_id, codec->revision_id, codec->type);
 200 }
 201 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
 202
 203 /**
 204  * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
 205  *      HD-audio controller
 206  * @codec: the codec object
 207  * @nid: NID to encode
 208  * @verb: verb to encode
 209  * @parm: parameter to encode
 210  *
 211  * Return an encoded command verb or -1 for error.
 212  */
 213 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
 214                                unsigned int verb, unsigned int parm)
 215 {
 216         u32 val, addr;
 217
 218         addr = codec->addr;
 219         if ((addr & ~0xf) || (nid & ~0x7f) ||
 220             (verb & ~0xfff) || (parm & ~0xffff)) {
 221                 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
 222                         addr, nid, verb, parm);
 223                 return -1;
 224         }
 225
 226         val = addr << 28;
 227         val |= (u32)nid << 20;
 228         val |= verb << 8;
 229         val |= parm;
 230         return val;
 231 }
 232 EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
 233
 234 /**
 235  * snd_hdac_exec_verb - execute an encoded verb
 236  * @codec: the codec object
 237  * @cmd: encoded verb to execute
 238  * @flags: optional flags, pass zero for default
 239  * @res: the pointer to store the result, NULL if running async
 240  *
 241  * Returns zero if successful, or a negative error code.
 242  *
 243  * This calls the exec_verb op when set in hdac_codec.  If not,
 244  * call the default snd_hdac_bus_exec_verb().
 245  */
 246 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
 247                        unsigned int flags, unsigned int *res)
 248 {
 249         if (codec->exec_verb)
 250                 return codec->exec_verb(codec, cmd, flags, res);
 251         return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
 252 }
 253 EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
 254
 255
 256 /**
 257  * snd_hdac_read - execute a verb
 258  * @codec: the codec object
 259  * @nid: NID to execute a verb
 260  * @verb: verb to execute
 261  * @parm: parameter for a verb
 262  * @res: the pointer to store the result, NULL if running async
 263  *
 264  * Returns zero if successful, or a negative error code.
 265  */
 266 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
 267                   unsigned int verb, unsigned int parm, unsigned int *res)
 268 {
 269         unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
 270
 271         return snd_hdac_exec_verb(codec, cmd, 0, res);
 272 }
 273 EXPORT_SYMBOL_GPL(snd_hdac_read);
 274
 275 /**
 276  * _snd_hdac_read_parm - read a parmeter
 277  *
 278  * This function returns zero or an error unlike snd_hdac_read_parm().
 279  */
 280 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
 281                         unsigned int *res)
 282 {
 283         unsigned int cmd;
 284
 285         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 286         return snd_hdac_regmap_read_raw(codec, cmd, res);
 287 }
 288 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
 289
 290 /**
 291  * snd_hdac_read_parm_uncached - read a codec parameter without caching
 292  * @codec: the codec object
 293  * @nid: NID to read a parameter
 294  * @parm: parameter to read
 295  *
 296  * Returns -1 for error.  If you need to distinguish the error more
 297  * strictly, use snd_hdac_read() directly.
 298  */
 299 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
 300                                 int parm)
 301 {
 302         int val;
 303
 304         if (codec->regmap)
 305                 regcache_cache_bypass(codec->regmap, true);
 306         val = snd_hdac_read_parm(codec, nid, parm);
 307         if (codec->regmap)
 308                 regcache_cache_bypass(codec->regmap, false);
 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  */
 393 int snd_hdac_refresh_widgets(struct hdac_device *codec)
 394 {
 395         hda_nid_t start_nid;
 396         int nums;
 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         codec->num_nodes = nums;
 406         codec->start_nid = start_nid;
 407         codec->end_nid = start_nid + nums;
 408         return 0;
 409 }
 410 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
 411
 412 /**
 413  * snd_hdac_refresh_widget_sysfs - Reset the codec widgets and reinit the
 414  * codec sysfs
 415  * @codec: the codec object
 416  *
 417  * first we need to remove sysfs, then refresh widgets and lastly
 418  * recreate it
 419  */
 420 int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec)
 421 {
 422         int ret;
 423
 424         if (device_is_registered(&codec->dev))
 425                 hda_widget_sysfs_exit(codec);
 426         ret = snd_hdac_refresh_widgets(codec);
 427         if (ret) {
 428                 dev_err(&codec->dev, "failed to refresh widget: %d\n", ret);
 429                 return ret;
 430         }
 431         if (device_is_registered(&codec->dev)) {
 432                 ret = hda_widget_sysfs_init(codec);
 433                 if (ret) {
 434                         dev_err(&codec->dev, "failed to init sysfs: %d\n", ret);
 435                         return ret;
 436                 }
 437         }
 438         return ret;
 439 }
 440 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widget_sysfs);
 441
 442 /* return CONNLIST_LEN parameter of the given widget */
 443 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
 444 {
 445         unsigned int wcaps = get_wcaps(codec, nid);
 446         unsigned int parm;
 447
 448         if (!(wcaps & AC_WCAP_CONN_LIST) &&
 449             get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
 450                 return 0;
 451
 452         parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
 453         if (parm == -1)
 454                 parm = 0;
 455         return parm;
 456 }
 457
 458 /**
 459  * snd_hdac_get_connections - get a widget connection list
 460  * @codec: the codec object
 461  * @nid: NID
 462  * @conn_list: the array to store the results, can be NULL
 463  * @max_conns: the max size of the given array
 464  *
 465  * Returns the number of connected widgets, zero for no connection, or a
 466  * negative error code.  When the number of elements don't fit with the
 467  * given array size, it returns -ENOSPC.
 468  *
 469  * When @conn_list is NULL, it just checks the number of connections.
 470  */
 471 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 472                              hda_nid_t *conn_list, int max_conns)
 473 {
 474         unsigned int parm;
 475         int i, conn_len, conns, err;
 476         unsigned int shift, num_elems, mask;
 477         hda_nid_t prev_nid;
 478         int null_count = 0;
 479
 480         parm = get_num_conns(codec, nid);
 481         if (!parm)
 482                 return 0;
 483
 484         if (parm & AC_CLIST_LONG) {
 485                 /* long form */
 486                 shift = 16;
 487                 num_elems = 2;
 488         } else {
 489                 /* short form */
 490                 shift = 8;
 491                 num_elems = 4;
 492         }
 493         conn_len = parm & AC_CLIST_LENGTH;
 494         mask = (1 << (shift-1)) - 1;
 495
 496         if (!conn_len)
 497                 return 0; /* no connection */
 498
 499         if (conn_len == 1) {
 500                 /* single connection */
 501                 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
 502                                     &parm);
 503                 if (err < 0)
 504                         return err;
 505                 if (conn_list)
 506                         conn_list[0] = parm & mask;
 507                 return 1;
 508         }
 509
 510         /* multi connection */
 511         conns = 0;
 512         prev_nid = 0;
 513         for (i = 0; i < conn_len; i++) {
 514                 int range_val;
 515                 hda_nid_t val, n;
 516
 517                 if (i % num_elems == 0) {
 518                         err = snd_hdac_read(codec, nid,
 519                                             AC_VERB_GET_CONNECT_LIST, i,
 520                                             &parm);
 521                         if (err < 0)
 522                                 return -EIO;
 523                 }
 524                 range_val = !!(parm & (1 << (shift-1))); /* ranges */
 525                 val = parm & mask;
 526                 if (val == 0 && null_count++) {  /* no second chance */
 527                         dev_dbg(&codec->dev,
 528                                 "invalid CONNECT_LIST verb %x[%i]:%x\n",
 529                                 nid, i, parm);
 530                         return 0;
 531                 }
 532                 parm >>= shift;
 533                 if (range_val) {
 534                         /* ranges between the previous and this one */
 535                         if (!prev_nid || prev_nid >= val) {
 536                                 dev_warn(&codec->dev,
 537                                          "invalid dep_range_val %x:%x\n",
 538                                          prev_nid, val);
 539                                 continue;
 540                         }
 541                         for (n = prev_nid + 1; n <= val; n++) {
 542                                 if (conn_list) {
 543                                         if (conns >= max_conns)
 544                                                 return -ENOSPC;
 545                                         conn_list[conns] = n;
 546                                 }
 547                                 conns++;
 548                         }
 549                 } else {
 550                         if (conn_list) {
 551                                 if (conns >= max_conns)
 552                                         return -ENOSPC;
 553                                 conn_list[conns] = val;
 554                         }
 555                         conns++;
 556                 }
 557                 prev_nid = val;
 558         }
 559         return conns;
 560 }
 561 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
 562
 563 #ifdef CONFIG_PM
 564 /**
 565  * snd_hdac_power_up - power up the codec
 566  * @codec: the codec object
 567  *
 568  * This function calls the runtime PM helper to power up the given codec.
 569  * Unlike snd_hdac_power_up_pm(), you should call this only for the code
 570  * path that isn't included in PM path.  Otherwise it gets stuck.
 571  *
 572  * Returns zero if successful, or a negative error code.
 573  */
 574 int snd_hdac_power_up(struct hdac_device *codec)
 575 {
 576         return pm_runtime_get_sync(&codec->dev);
 577 }
 578 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
 579
 580 /**
 581  * snd_hdac_power_down - power down the codec
 582  * @codec: the codec object
 583  *
 584  * Returns zero if successful, or a negative error code.
 585  */
 586 int snd_hdac_power_down(struct hdac_device *codec)
 587 {
 588         struct device *dev = &codec->dev;
 589
 590         pm_runtime_mark_last_busy(dev);
 591         return pm_runtime_put_autosuspend(dev);
 592 }
 593 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
 594
 595 /**
 596  * snd_hdac_power_up_pm - power up the codec
 597  * @codec: the codec object
 598  *
 599  * This function can be called in a recursive code path like init code
 600  * which may be called by PM suspend/resume again.  OTOH, if a power-up
 601  * call must wake up the sleeper (e.g. in a kctl callback), use
 602  * snd_hdac_power_up() instead.
 603  *
 604  * Returns zero if successful, or a negative error code.
 605  */
 606 int snd_hdac_power_up_pm(struct hdac_device *codec)
 607 {
 608         if (!atomic_inc_not_zero(&codec->in_pm))
 609                 return snd_hdac_power_up(codec);
 610         return 0;
 611 }
 612 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
 613
 614 /**
 615  * snd_hdac_power_down_pm - power down the codec
 616  * @codec: the codec object
 617  *
 618  * Like snd_hdac_power_up_pm(), this function is used in a recursive
 619  * code path like init code which may be called by PM suspend/resume again.
 620  *
 621  * Returns zero if successful, or a negative error code.
 622  */
 623 int snd_hdac_power_down_pm(struct hdac_device *codec)
 624 {
 625         if (atomic_dec_if_positive(&codec->in_pm) < 0)
 626                 return snd_hdac_power_down(codec);
 627         return 0;
 628 }
 629 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
 630 #endif
 631
 632 /**
 633  * snd_hdac_link_power - Enable/disable the link power for a codec
 634  * @codec: the codec object
 635  * @bool: enable or disable the link power
 636  */
 637 int snd_hdac_link_power(struct hdac_device *codec, bool enable)
 638 {
 639         if  (!codec->link_power_control)
 640                 return 0;
 641
 642         if  (codec->bus->ops->link_power)
 643                 return codec->bus->ops->link_power(codec->bus, enable);
 644         else
 645                 return -EINVAL;
 646 }
 647 EXPORT_SYMBOL_GPL(snd_hdac_link_power);
 648
 649 /* codec vendor labels */
 650 struct hda_vendor_id {
 651         unsigned int id;
 652         const char *name;
 653 };
 654
 655 static struct hda_vendor_id hda_vendor_ids[] = {
 656         { 0x1002, "ATI" },
 657         { 0x1013, "Cirrus Logic" },
 658         { 0x1057, "Motorola" },
 659         { 0x1095, "Silicon Image" },
 660         { 0x10de, "Nvidia" },
 661         { 0x10ec, "Realtek" },
 662         { 0x1102, "Creative" },
 663         { 0x1106, "VIA" },
 664         { 0x111d, "IDT" },
 665         { 0x11c1, "LSI" },
 666         { 0x11d4, "Analog Devices" },
 667         { 0x13f6, "C-Media" },
 668         { 0x14f1, "Conexant" },
 669         { 0x17e8, "Chrontel" },
 670         { 0x1854, "LG" },
 671         { 0x1aec, "Wolfson Microelectronics" },
 672         { 0x1af4, "QEMU" },
 673         { 0x434d, "C-Media" },
 674         { 0x8086, "Intel" },
 675         { 0x8384, "SigmaTel" },
 676         {} /* terminator */
 677 };
 678
 679 /* store the codec vendor name */
 680 static int get_codec_vendor_name(struct hdac_device *codec)
 681 {
 682         const struct hda_vendor_id *c;
 683         u16 vendor_id = codec->vendor_id >> 16;
 684
 685         for (c = hda_vendor_ids; c->id; c++) {
 686                 if (c->id == vendor_id) {
 687                         codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
 688                         return codec->vendor_name ? 0 : -ENOMEM;
 689                 }
 690         }
 691
 692         codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
 693         return codec->vendor_name ? 0 : -ENOMEM;
 694 }
 695
 696 /*
 697  * stream formats
 698  */
 699 struct hda_rate_tbl {
 700         unsigned int hz;
 701         unsigned int alsa_bits;
 702         unsigned int hda_fmt;
 703 };
 704
 705 /* rate = base * mult / div */
 706 #define HDA_RATE(base, mult, div) \
 707         (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
 708          (((div) - 1) << AC_FMT_DIV_SHIFT))
 709
 710 static struct hda_rate_tbl rate_bits[] = {
 711         /* rate in Hz, ALSA rate bitmask, HDA format value */
 712
 713         /* autodetected value used in snd_hda_query_supported_pcm */
 714         { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
 715         { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
 716         { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
 717         { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
 718         { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
 719         { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
 720         { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
 721         { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
 722         { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
 723         { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
 724         { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
 725 #define AC_PAR_PCM_RATE_BITS    11
 726         /* up to bits 10, 384kHZ isn't supported properly */
 727
 728         /* not autodetected value */
 729         { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
 730
 731         { 0 } /* terminator */
 732 };
 733
 734 /**
 735  * snd_hdac_calc_stream_format - calculate the format bitset
 736  * @rate: the sample rate
 737  * @channels: the number of channels
 738  * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 739  * @maxbps: the max. bps
 740  * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
 741  *
 742  * Calculate the format bitset from the given rate, channels and th PCM format.
 743  *
 744  * Return zero if invalid.
 745  */
 746 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 747                                          unsigned int channels,
 748                                          unsigned int format,
 749                                          unsigned int maxbps,
 750                                          unsigned short spdif_ctls)
 751 {
 752         int i;
 753         unsigned int val = 0;
 754
 755         for (i = 0; rate_bits[i].hz; i++)
 756                 if (rate_bits[i].hz == rate) {
 757                         val = rate_bits[i].hda_fmt;
 758                         break;
 759                 }
 760         if (!rate_bits[i].hz)
 761                 return 0;
 762
 763         if (channels == 0 || channels > 8)
 764                 return 0;
 765         val |= channels - 1;
 766
 767         switch (snd_pcm_format_width(format)) {
 768         case 8:
 769                 val |= AC_FMT_BITS_8;
 770                 break;
 771         case 16:
 772                 val |= AC_FMT_BITS_16;
 773                 break;
 774         case 20:
 775         case 24:
 776         case 32:
 777                 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
 778                         val |= AC_FMT_BITS_32;
 779                 else if (maxbps >= 24)
 780                         val |= AC_FMT_BITS_24;
 781                 else
 782                         val |= AC_FMT_BITS_20;
 783                 break;
 784         default:
 785                 return 0;
 786         }
 787
 788         if (spdif_ctls & AC_DIG1_NONAUDIO)
 789                 val |= AC_FMT_TYPE_NON_PCM;
 790
 791         return val;
 792 }
 793 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
 794
 795 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
 796 {
 797         unsigned int val = 0;
 798
 799         if (nid != codec->afg &&
 800             (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
 801                 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
 802         if (!val || val == -1)
 803                 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
 804         if (!val || val == -1)
 805                 return 0;
 806         return val;
 807 }
 808
 809 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
 810 {
 811         unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
 812
 813         if (!streams || streams == -1)
 814                 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
 815         if (!streams || streams == -1)
 816                 return 0;
 817         return streams;
 818 }
 819
 820 /**
 821  * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
 822  * @codec: the codec object
 823  * @nid: NID to query
 824  * @ratesp: the pointer to store the detected rate bitflags
 825  * @formatsp: the pointer to store the detected formats
 826  * @bpsp: the pointer to store the detected format widths
 827  *
 828  * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 829  * or @bsps argument is ignored.
 830  *
 831  * Returns 0 if successful, otherwise a negative error code.
 832  */
 833 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 834                                  u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
 835 {
 836         unsigned int i, val, wcaps;
 837
 838         wcaps = get_wcaps(codec, nid);
 839         val = query_pcm_param(codec, nid);
 840
 841         if (ratesp) {
 842                 u32 rates = 0;
 843                 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
 844                         if (val & (1 << i))
 845                                 rates |= rate_bits[i].alsa_bits;
 846                 }
 847                 if (rates == 0) {
 848                         dev_err(&codec->dev,
 849                                 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
 850                                 nid, val,
 851                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
 852                         return -EIO;
 853                 }
 854                 *ratesp = rates;
 855         }
 856
 857         if (formatsp || bpsp) {
 858                 u64 formats = 0;
 859                 unsigned int streams, bps;
 860
 861                 streams = query_stream_param(codec, nid);
 862                 if (!streams)
 863                         return -EIO;
 864
 865                 bps = 0;
 866                 if (streams & AC_SUPFMT_PCM) {
 867                         if (val & AC_SUPPCM_BITS_8) {
 868                                 formats |= SNDRV_PCM_FMTBIT_U8;
 869                                 bps = 8;
 870                         }
 871                         if (val & AC_SUPPCM_BITS_16) {
 872                                 formats |= SNDRV_PCM_FMTBIT_S16_LE;
 873                                 bps = 16;
 874                         }
 875                         if (wcaps & AC_WCAP_DIGITAL) {
 876                                 if (val & AC_SUPPCM_BITS_32)
 877                                         formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
 878                                 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
 879                                         formats |= SNDRV_PCM_FMTBIT_S32_LE;
 880                                 if (val & AC_SUPPCM_BITS_24)
 881                                         bps = 24;
 882                                 else if (val & AC_SUPPCM_BITS_20)
 883                                         bps = 20;
 884                         } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
 885                                           AC_SUPPCM_BITS_32)) {
 886                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
 887                                 if (val & AC_SUPPCM_BITS_32)
 888                                         bps = 32;
 889                                 else if (val & AC_SUPPCM_BITS_24)
 890                                         bps = 24;
 891                                 else if (val & AC_SUPPCM_BITS_20)
 892                                         bps = 20;
 893                         }
 894                 }
 895 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
 896                 if (streams & AC_SUPFMT_FLOAT32) {
 897                         formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 898                         if (!bps)
 899                                 bps = 32;
 900                 }
 901 #endif
 902                 if (streams == AC_SUPFMT_AC3) {
 903                         /* should be exclusive */
 904                         /* temporary hack: we have still no proper support
 905                          * for the direct AC3 stream...
 906                          */
 907                         formats |= SNDRV_PCM_FMTBIT_U8;
 908                         bps = 8;
 909                 }
 910                 if (formats == 0) {
 911                         dev_err(&codec->dev,
 912                                 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
 913                                 nid, val,
 914                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
 915                                 streams);
 916                         return -EIO;
 917                 }
 918                 if (formatsp)
 919                         *formatsp = formats;
 920                 if (bpsp)
 921                         *bpsp = bps;
 922         }
 923
 924         return 0;
 925 }
 926 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
 927
 928 /**
 929  * snd_hdac_is_supported_format - Check the validity of the format
 930  * @codec: the codec object
 931  * @nid: NID to check
 932  * @format: the HD-audio format value to check
 933  *
 934  * Check whether the given node supports the format value.
 935  *
 936  * Returns true if supported, false if not.
 937  */
 938 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 939                                   unsigned int format)
 940 {
 941         int i;
 942         unsigned int val = 0, rate, stream;
 943
 944         val = query_pcm_param(codec, nid);
 945         if (!val)
 946                 return false;
 947
 948         rate = format & 0xff00;
 949         for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
 950                 if (rate_bits[i].hda_fmt == rate) {
 951                         if (val & (1 << i))
 952                                 break;
 953                         return false;
 954                 }
 955         if (i >= AC_PAR_PCM_RATE_BITS)
 956                 return false;
 957
 958         stream = query_stream_param(codec, nid);
 959         if (!stream)
 960                 return false;
 961
 962         if (stream & AC_SUPFMT_PCM) {
 963                 switch (format & 0xf0) {
 964                 case 0x00:
 965                         if (!(val & AC_SUPPCM_BITS_8))
 966                                 return false;
 967                         break;
 968                 case 0x10:
 969                         if (!(val & AC_SUPPCM_BITS_16))
 970                                 return false;
 971                         break;
 972                 case 0x20:
 973                         if (!(val & AC_SUPPCM_BITS_20))
 974                                 return false;
 975                         break;
 976                 case 0x30:
 977                         if (!(val & AC_SUPPCM_BITS_24))
 978                                 return false;
 979                         break;
 980                 case 0x40:
 981                         if (!(val & AC_SUPPCM_BITS_32))
 982                                 return false;
 983                         break;
 984                 default:
 985                         return false;
 986                 }
 987         } else {
 988                 /* FIXME: check for float32 and AC3? */
 989         }
 990
 991         return true;
 992 }
 993 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
 994
 995 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
 996                         int flags, unsigned int verb, unsigned int parm)
 997 {
 998         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
 999         unsigned int res;
1000
1001         if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
1002                 return -1;
1003
1004         return res;
1005 }
1006
1007 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
1008                         int flags, unsigned int verb, unsigned int parm)
1009 {
1010         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1011
1012         return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
1013 }
1014
1015 /**
1016  * snd_hdac_codec_read - send a command and get the response
1017  * @hdac: the HDAC device
1018  * @nid: NID to send the command
1019  * @flags: optional bit flags
1020  * @verb: the verb to send
1021  * @parm: the parameter for the verb
1022  *
1023  * Send a single command and read the corresponding response.
1024  *
1025  * Returns the obtained response value, or -1 for an error.
1026  */
1027 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1028                         int flags, unsigned int verb, unsigned int parm)
1029 {
1030         return codec_read(hdac, nid, flags, verb, parm);
1031 }
1032 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1033
1034 /**
1035  * snd_hdac_codec_write - send a single command without waiting for response
1036  * @hdac: the HDAC device
1037  * @nid: NID to send the command
1038  * @flags: optional bit flags
1039  * @verb: the verb to send
1040  * @parm: the parameter for the verb
1041  *
1042  * Send a single command without waiting for response.
1043  *
1044  * Returns 0 if successful, or a negative error code.
1045  */
1046 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1047                         int flags, unsigned int verb, unsigned int parm)
1048 {
1049         return codec_write(hdac, nid, flags, verb, parm);
1050 }
1051 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1052
1053 /**
1054  * snd_hdac_check_power_state - check whether the actual power state matches
1055  * with the target state
1056  *
1057  * @hdac: the HDAC device
1058  * @nid: NID to send the command
1059  * @target_state: target state to check for
1060  *
1061  * Return true if state matches, false if not
1062  */
1063 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1064                 hda_nid_t nid, unsigned int target_state)
1065 {
1066         unsigned int state = codec_read(hdac, nid, 0,
1067                                 AC_VERB_GET_POWER_STATE, 0);
1068
1069         if (state & AC_PWRST_ERROR)
1070                 return true;
1071         state = (state >> 4) & 0x0f;
1072         return (state == target_state);
1073 }
1074 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);