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                 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  */
 392 int snd_hdac_refresh_widgets(struct hdac_device *codec)
 393 {
 394         hda_nid_t start_nid;
 395         int nums;
 396
 397         nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
 398         if (!start_nid || nums <= 0 || nums >= 0xff) {
 399                 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
 400                         codec->afg);
 401                 return -EINVAL;
 402         }
 403
 404         codec->num_nodes = nums;
 405         codec->start_nid = start_nid;
 406         codec->end_nid = start_nid + nums;
 407         return 0;
 408 }
 409 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
 410
 411 /**
 412  * snd_hdac_refresh_widget_sysfs - Reset the codec widgets and reinit the
 413  * codec sysfs
 414  * @codec: the codec object
 415  *
 416  * first we need to remove sysfs, then refresh widgets and lastly
 417  * recreate it
 418  */
 419 int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec)
 420 {
 421         int ret;
 422
 423         if (device_is_registered(&codec->dev))
 424                 hda_widget_sysfs_exit(codec);
 425         ret = snd_hdac_refresh_widgets(codec);
 426         if (ret) {
 427                 dev_err(&codec->dev, "failed to refresh widget: %d\n", ret);
 428                 return ret;
 429         }
 430         if (device_is_registered(&codec->dev)) {
 431                 ret = hda_widget_sysfs_init(codec);
 432                 if (ret) {
 433                         dev_err(&codec->dev, "failed to init sysfs: %d\n", ret);
 434                         return ret;
 435                 }
 436         }
 437         return ret;
 438 }
 439 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widget_sysfs);
 440
 441 /* return CONNLIST_LEN parameter of the given widget */
 442 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
 443 {
 444         unsigned int wcaps = get_wcaps(codec, nid);
 445         unsigned int parm;
 446
 447         if (!(wcaps & AC_WCAP_CONN_LIST) &&
 448             get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
 449                 return 0;
 450
 451         parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
 452         if (parm == -1)
 453                 parm = 0;
 454         return parm;
 455 }
 456
 457 /**
 458  * snd_hdac_get_connections - get a widget connection list
 459  * @codec: the codec object
 460  * @nid: NID
 461  * @conn_list: the array to store the results, can be NULL
 462  * @max_conns: the max size of the given array
 463  *
 464  * Returns the number of connected widgets, zero for no connection, or a
 465  * negative error code.  When the number of elements don't fit with the
 466  * given array size, it returns -ENOSPC.
 467  *
 468  * When @conn_list is NULL, it just checks the number of connections.
 469  */
 470 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 471                              hda_nid_t *conn_list, int max_conns)
 472 {
 473         unsigned int parm;
 474         int i, conn_len, conns, err;
 475         unsigned int shift, num_elems, mask;
 476         hda_nid_t prev_nid;
 477         int null_count = 0;
 478
 479         parm = get_num_conns(codec, nid);
 480         if (!parm)
 481                 return 0;
 482
 483         if (parm & AC_CLIST_LONG) {
 484                 /* long form */
 485                 shift = 16;
 486                 num_elems = 2;
 487         } else {
 488                 /* short form */
 489                 shift = 8;
 490                 num_elems = 4;
 491         }
 492         conn_len = parm & AC_CLIST_LENGTH;
 493         mask = (1 << (shift-1)) - 1;
 494
 495         if (!conn_len)
 496                 return 0; /* no connection */
 497
 498         if (conn_len == 1) {
 499                 /* single connection */
 500                 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
 501                                     &parm);
 502                 if (err < 0)
 503                         return err;
 504                 if (conn_list)
 505                         conn_list[0] = parm & mask;
 506                 return 1;
 507         }
 508
 509         /* multi connection */
 510         conns = 0;
 511         prev_nid = 0;
 512         for (i = 0; i < conn_len; i++) {
 513                 int range_val;
 514                 hda_nid_t val, n;
 515
 516                 if (i % num_elems == 0) {
 517                         err = snd_hdac_read(codec, nid,
 518                                             AC_VERB_GET_CONNECT_LIST, i,
 519                                             &parm);
 520                         if (err < 0)
 521                                 return -EIO;
 522                 }
 523                 range_val = !!(parm & (1 << (shift-1))); /* ranges */
 524                 val = parm & mask;
 525                 if (val == 0 && null_count++) {  /* no second chance */
 526                         dev_dbg(&codec->dev,
 527                                 "invalid CONNECT_LIST verb %x[%i]:%x\n",
 528                                 nid, i, parm);
 529                         return 0;
 530                 }
 531                 parm >>= shift;
 532                 if (range_val) {
 533                         /* ranges between the previous and this one */
 534                         if (!prev_nid || prev_nid >= val) {
 535                                 dev_warn(&codec->dev,
 536                                          "invalid dep_range_val %x:%x\n",
 537                                          prev_nid, val);
 538                                 continue;
 539                         }
 540                         for (n = prev_nid + 1; n <= val; n++) {
 541                                 if (conn_list) {
 542                                         if (conns >= max_conns)
 543                                                 return -ENOSPC;
 544                                         conn_list[conns] = n;
 545                                 }
 546                                 conns++;
 547                         }
 548                 } else {
 549                         if (conn_list) {
 550                                 if (conns >= max_conns)
 551                                         return -ENOSPC;
 552                                 conn_list[conns] = val;
 553                         }
 554                         conns++;
 555                 }
 556                 prev_nid = val;
 557         }
 558         return conns;
 559 }
 560 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
 561
 562 #ifdef CONFIG_PM
 563 /**
 564  * snd_hdac_power_up - power up the codec
 565  * @codec: the codec object
 566  *
 567  * This function calls the runtime PM helper to power up the given codec.
 568  * Unlike snd_hdac_power_up_pm(), you should call this only for the code
 569  * path that isn't included in PM path.  Otherwise it gets stuck.
 570  *
 571  * Returns zero if successful, or a negative error code.
 572  */
 573 int snd_hdac_power_up(struct hdac_device *codec)
 574 {
 575         return pm_runtime_get_sync(&codec->dev);
 576 }
 577 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
 578
 579 /**
 580  * snd_hdac_power_down - power down the codec
 581  * @codec: the codec object
 582  *
 583  * Returns zero if successful, or a negative error code.
 584  */
 585 int snd_hdac_power_down(struct hdac_device *codec)
 586 {
 587         struct device *dev = &codec->dev;
 588
 589         pm_runtime_mark_last_busy(dev);
 590         return pm_runtime_put_autosuspend(dev);
 591 }
 592 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
 593
 594 /**
 595  * snd_hdac_power_up_pm - power up the codec
 596  * @codec: the codec object
 597  *
 598  * This function can be called in a recursive code path like init code
 599  * which may be called by PM suspend/resume again.  OTOH, if a power-up
 600  * call must wake up the sleeper (e.g. in a kctl callback), use
 601  * snd_hdac_power_up() instead.
 602  *
 603  * Returns zero if successful, or a negative error code.
 604  */
 605 int snd_hdac_power_up_pm(struct hdac_device *codec)
 606 {
 607         if (!atomic_inc_not_zero(&codec->in_pm))
 608                 return snd_hdac_power_up(codec);
 609         return 0;
 610 }
 611 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
 612
 613 /* like snd_hdac_power_up_pm(), but only increment the pm count when
 614  * already powered up.  Returns -1 if not powered up, 1 if incremented
 615  * or 0 if unchanged.  Only used in hdac_regmap.c
 616  */
 617 int snd_hdac_keep_power_up(struct hdac_device *codec)
 618 {
 619         if (!atomic_inc_not_zero(&codec->in_pm)) {
 620                 int ret = pm_runtime_get_if_in_use(&codec->dev);
 621                 if (!ret)
 622                         return -1;
 623                 if (ret < 0)
 624                         return 0;
 625         }
 626         return 1;
 627 }
 628
 629 /**
 630  * snd_hdac_power_down_pm - power down the codec
 631  * @codec: the codec object
 632  *
 633  * Like snd_hdac_power_up_pm(), this function is used in a recursive
 634  * code path like init code which may be called by PM suspend/resume again.
 635  *
 636  * Returns zero if successful, or a negative error code.
 637  */
 638 int snd_hdac_power_down_pm(struct hdac_device *codec)
 639 {
 640         if (atomic_dec_if_positive(&codec->in_pm) < 0)
 641                 return snd_hdac_power_down(codec);
 642         return 0;
 643 }
 644 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
 645 #endif
 646
 647 /**
 648  * snd_hdac_link_power - Enable/disable the link power for a codec
 649  * @codec: the codec object
 650  * @bool: enable or disable the link power
 651  */
 652 int snd_hdac_link_power(struct hdac_device *codec, bool enable)
 653 {
 654         if  (!codec->link_power_control)
 655                 return 0;
 656
 657         if  (codec->bus->ops->link_power)
 658                 return codec->bus->ops->link_power(codec->bus, enable);
 659         else
 660                 return -EINVAL;
 661 }
 662 EXPORT_SYMBOL_GPL(snd_hdac_link_power);
 663
 664 /* codec vendor labels */
 665 struct hda_vendor_id {
 666         unsigned int id;
 667         const char *name;
 668 };
 669
 670 static struct hda_vendor_id hda_vendor_ids[] = {
 671         { 0x1002, "ATI" },
 672         { 0x1013, "Cirrus Logic" },
 673         { 0x1057, "Motorola" },
 674         { 0x1095, "Silicon Image" },
 675         { 0x10de, "Nvidia" },
 676         { 0x10ec, "Realtek" },
 677         { 0x1102, "Creative" },
 678         { 0x1106, "VIA" },
 679         { 0x111d, "IDT" },
 680         { 0x11c1, "LSI" },
 681         { 0x11d4, "Analog Devices" },
 682         { 0x13f6, "C-Media" },
 683         { 0x14f1, "Conexant" },
 684         { 0x17e8, "Chrontel" },
 685         { 0x1854, "LG" },
 686         { 0x1aec, "Wolfson Microelectronics" },
 687         { 0x1af4, "QEMU" },
 688         { 0x434d, "C-Media" },
 689         { 0x8086, "Intel" },
 690         { 0x8384, "SigmaTel" },
 691         {} /* terminator */
 692 };
 693
 694 /* store the codec vendor name */
 695 static int get_codec_vendor_name(struct hdac_device *codec)
 696 {
 697         const struct hda_vendor_id *c;
 698         u16 vendor_id = codec->vendor_id >> 16;
 699
 700         for (c = hda_vendor_ids; c->id; c++) {
 701                 if (c->id == vendor_id) {
 702                         codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
 703                         return codec->vendor_name ? 0 : -ENOMEM;
 704                 }
 705         }
 706
 707         codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
 708         return codec->vendor_name ? 0 : -ENOMEM;
 709 }
 710
 711 /*
 712  * stream formats
 713  */
 714 struct hda_rate_tbl {
 715         unsigned int hz;
 716         unsigned int alsa_bits;
 717         unsigned int hda_fmt;
 718 };
 719
 720 /* rate = base * mult / div */
 721 #define HDA_RATE(base, mult, div) \
 722         (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
 723          (((div) - 1) << AC_FMT_DIV_SHIFT))
 724
 725 static struct hda_rate_tbl rate_bits[] = {
 726         /* rate in Hz, ALSA rate bitmask, HDA format value */
 727
 728         /* autodetected value used in snd_hda_query_supported_pcm */
 729         { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
 730         { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
 731         { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
 732         { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
 733         { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
 734         { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
 735         { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
 736         { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
 737         { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
 738         { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
 739         { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
 740 #define AC_PAR_PCM_RATE_BITS    11
 741         /* up to bits 10, 384kHZ isn't supported properly */
 742
 743         /* not autodetected value */
 744         { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
 745
 746         { 0 } /* terminator */
 747 };
 748
 749 /**
 750  * snd_hdac_calc_stream_format - calculate the format bitset
 751  * @rate: the sample rate
 752  * @channels: the number of channels
 753  * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 754  * @maxbps: the max. bps
 755  * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
 756  *
 757  * Calculate the format bitset from the given rate, channels and th PCM format.
 758  *
 759  * Return zero if invalid.
 760  */
 761 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 762                                          unsigned int channels,
 763                                          unsigned int format,
 764                                          unsigned int maxbps,
 765                                          unsigned short spdif_ctls)
 766 {
 767         int i;
 768         unsigned int val = 0;
 769
 770         for (i = 0; rate_bits[i].hz; i++)
 771                 if (rate_bits[i].hz == rate) {
 772                         val = rate_bits[i].hda_fmt;
 773                         break;
 774                 }
 775         if (!rate_bits[i].hz)
 776                 return 0;
 777
 778         if (channels == 0 || channels > 8)
 779                 return 0;
 780         val |= channels - 1;
 781
 782         switch (snd_pcm_format_width(format)) {
 783         case 8:
 784                 val |= AC_FMT_BITS_8;
 785                 break;
 786         case 16:
 787                 val |= AC_FMT_BITS_16;
 788                 break;
 789         case 20:
 790         case 24:
 791         case 32:
 792                 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
 793                         val |= AC_FMT_BITS_32;
 794                 else if (maxbps >= 24)
 795                         val |= AC_FMT_BITS_24;
 796                 else
 797                         val |= AC_FMT_BITS_20;
 798                 break;
 799         default:
 800                 return 0;
 801         }
 802
 803         if (spdif_ctls & AC_DIG1_NONAUDIO)
 804                 val |= AC_FMT_TYPE_NON_PCM;
 805
 806         return val;
 807 }
 808 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
 809
 810 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
 811 {
 812         unsigned int val = 0;
 813
 814         if (nid != codec->afg &&
 815             (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
 816                 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
 817         if (!val || val == -1)
 818                 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
 819         if (!val || val == -1)
 820                 return 0;
 821         return val;
 822 }
 823
 824 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
 825 {
 826         unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
 827
 828         if (!streams || streams == -1)
 829                 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
 830         if (!streams || streams == -1)
 831                 return 0;
 832         return streams;
 833 }
 834
 835 /**
 836  * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
 837  * @codec: the codec object
 838  * @nid: NID to query
 839  * @ratesp: the pointer to store the detected rate bitflags
 840  * @formatsp: the pointer to store the detected formats
 841  * @bpsp: the pointer to store the detected format widths
 842  *
 843  * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 844  * or @bsps argument is ignored.
 845  *
 846  * Returns 0 if successful, otherwise a negative error code.
 847  */
 848 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 849                                  u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
 850 {
 851         unsigned int i, val, wcaps;
 852
 853         wcaps = get_wcaps(codec, nid);
 854         val = query_pcm_param(codec, nid);
 855
 856         if (ratesp) {
 857                 u32 rates = 0;
 858                 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
 859                         if (val & (1 << i))
 860                                 rates |= rate_bits[i].alsa_bits;
 861                 }
 862                 if (rates == 0) {
 863                         dev_err(&codec->dev,
 864                                 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
 865                                 nid, val,
 866                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
 867                         return -EIO;
 868                 }
 869                 *ratesp = rates;
 870         }
 871
 872         if (formatsp || bpsp) {
 873                 u64 formats = 0;
 874                 unsigned int streams, bps;
 875
 876                 streams = query_stream_param(codec, nid);
 877                 if (!streams)
 878                         return -EIO;
 879
 880                 bps = 0;
 881                 if (streams & AC_SUPFMT_PCM) {
 882                         if (val & AC_SUPPCM_BITS_8) {
 883                                 formats |= SNDRV_PCM_FMTBIT_U8;
 884                                 bps = 8;
 885                         }
 886                         if (val & AC_SUPPCM_BITS_16) {
 887                                 formats |= SNDRV_PCM_FMTBIT_S16_LE;
 888                                 bps = 16;
 889                         }
 890                         if (wcaps & AC_WCAP_DIGITAL) {
 891                                 if (val & AC_SUPPCM_BITS_32)
 892                                         formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
 893                                 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
 894                                         formats |= SNDRV_PCM_FMTBIT_S32_LE;
 895                                 if (val & AC_SUPPCM_BITS_24)
 896                                         bps = 24;
 897                                 else if (val & AC_SUPPCM_BITS_20)
 898                                         bps = 20;
 899                         } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
 900                                           AC_SUPPCM_BITS_32)) {
 901                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
 902                                 if (val & AC_SUPPCM_BITS_32)
 903                                         bps = 32;
 904                                 else if (val & AC_SUPPCM_BITS_24)
 905                                         bps = 24;
 906                                 else if (val & AC_SUPPCM_BITS_20)
 907                                         bps = 20;
 908                         }
 909                 }
 910 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
 911                 if (streams & AC_SUPFMT_FLOAT32) {
 912                         formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 913                         if (!bps)
 914                                 bps = 32;
 915                 }
 916 #endif
 917                 if (streams == AC_SUPFMT_AC3) {
 918                         /* should be exclusive */
 919                         /* temporary hack: we have still no proper support
 920                          * for the direct AC3 stream...
 921                          */
 922                         formats |= SNDRV_PCM_FMTBIT_U8;
 923                         bps = 8;
 924                 }
 925                 if (formats == 0) {
 926                         dev_err(&codec->dev,
 927                                 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
 928                                 nid, val,
 929                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
 930                                 streams);
 931                         return -EIO;
 932                 }
 933                 if (formatsp)
 934                         *formatsp = formats;
 935                 if (bpsp)
 936                         *bpsp = bps;
 937         }
 938
 939         return 0;
 940 }
 941 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
 942
 943 /**
 944  * snd_hdac_is_supported_format - Check the validity of the format
 945  * @codec: the codec object
 946  * @nid: NID to check
 947  * @format: the HD-audio format value to check
 948  *
 949  * Check whether the given node supports the format value.
 950  *
 951  * Returns true if supported, false if not.
 952  */
 953 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 954                                   unsigned int format)
 955 {
 956         int i;
 957         unsigned int val = 0, rate, stream;
 958
 959         val = query_pcm_param(codec, nid);
 960         if (!val)
 961                 return false;
 962
 963         rate = format & 0xff00;
 964         for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
 965                 if (rate_bits[i].hda_fmt == rate) {
 966                         if (val & (1 << i))
 967                                 break;
 968                         return false;
 969                 }
 970         if (i >= AC_PAR_PCM_RATE_BITS)
 971                 return false;
 972
 973         stream = query_stream_param(codec, nid);
 974         if (!stream)
 975                 return false;
 976
 977         if (stream & AC_SUPFMT_PCM) {
 978                 switch (format & 0xf0) {
 979                 case 0x00:
 980                         if (!(val & AC_SUPPCM_BITS_8))
 981                                 return false;
 982                         break;
 983                 case 0x10:
 984                         if (!(val & AC_SUPPCM_BITS_16))
 985                                 return false;
 986                         break;
 987                 case 0x20:
 988                         if (!(val & AC_SUPPCM_BITS_20))
 989                                 return false;
 990                         break;
 991                 case 0x30:
 992                         if (!(val & AC_SUPPCM_BITS_24))
 993                                 return false;
 994                         break;
 995                 case 0x40:
 996                         if (!(val & AC_SUPPCM_BITS_32))
 997                                 return false;
 998                         break;
 999                 default:
1000                         return false;
1001                 }
1002         } else {
1003                 /* FIXME: check for float32 and AC3? */
1004         }
1005
1006         return true;
1007 }
1008 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
1009
1010 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
1011                         int flags, unsigned int verb, unsigned int parm)
1012 {
1013         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1014         unsigned int res;
1015
1016         if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
1017                 return -1;
1018
1019         return res;
1020 }
1021
1022 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
1023                         int flags, unsigned int verb, unsigned int parm)
1024 {
1025         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1026
1027         return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
1028 }
1029
1030 /**
1031  * snd_hdac_codec_read - send a command and get the response
1032  * @hdac: the HDAC device
1033  * @nid: NID to send the command
1034  * @flags: optional bit flags
1035  * @verb: the verb to send
1036  * @parm: the parameter for the verb
1037  *
1038  * Send a single command and read the corresponding response.
1039  *
1040  * Returns the obtained response value, or -1 for an error.
1041  */
1042 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1043                         int flags, unsigned int verb, unsigned int parm)
1044 {
1045         return codec_read(hdac, nid, flags, verb, parm);
1046 }
1047 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1048
1049 /**
1050  * snd_hdac_codec_write - send a single command without waiting for response
1051  * @hdac: the HDAC device
1052  * @nid: NID to send the command
1053  * @flags: optional bit flags
1054  * @verb: the verb to send
1055  * @parm: the parameter for the verb
1056  *
1057  * Send a single command without waiting for response.
1058  *
1059  * Returns 0 if successful, or a negative error code.
1060  */
1061 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1062                         int flags, unsigned int verb, unsigned int parm)
1063 {
1064         return codec_write(hdac, nid, flags, verb, parm);
1065 }
1066 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1067
1068 /**
1069  * snd_hdac_check_power_state - check whether the actual power state matches
1070  * with the target state
1071  *
1072  * @hdac: the HDAC device
1073  * @nid: NID to send the command
1074  * @target_state: target state to check for
1075  *
1076  * Return true if state matches, false if not
1077  */
1078 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1079                 hda_nid_t nid, unsigned int target_state)
1080 {
1081         unsigned int state = codec_read(hdac, nid, 0,
1082                                 AC_VERB_GET_POWER_STATE, 0);
1083
1084         if (state & AC_PWRST_ERROR)
1085                 return true;
1086         state = (state >> 4) & 0x0f;
1087         return (state == target_state);
1088 }
1089 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);