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         unsigned int cmd, val;
 303
 304         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 305         if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
 306                 return -1;
 307         return val;
 308 }
 309 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
 310
 311 /**
 312  * snd_hdac_override_parm - override read-only parameters
 313  * @codec: the codec object
 314  * @nid: NID for the parameter
 315  * @parm: the parameter to change
 316  * @val: the parameter value to overwrite
 317  */
 318 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
 319                            unsigned int parm, unsigned int val)
 320 {
 321         unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
 322         int err;
 323
 324         if (!codec->regmap)
 325                 return -EINVAL;
 326
 327         codec->caps_overwriting = true;
 328         err = snd_hdac_regmap_write_raw(codec, verb, val);
 329         codec->caps_overwriting = false;
 330         return err;
 331 }
 332 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
 333
 334 /**
 335  * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
 336  * @codec: the codec object
 337  * @nid: NID to inspect
 338  * @start_id: the pointer to store the starting NID
 339  *
 340  * Returns the number of subtree nodes or zero if not found.
 341  * This function reads parameters always without caching.
 342  */
 343 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 344                            hda_nid_t *start_id)
 345 {
 346         unsigned int parm;
 347
 348         parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
 349         if (parm == -1) {
 350                 *start_id = 0;
 351                 return 0;
 352         }
 353         *start_id = (parm >> 16) & 0x7fff;
 354         return (int)(parm & 0x7fff);
 355 }
 356 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
 357
 358 /*
 359  * look for an AFG and MFG nodes
 360  */
 361 static void setup_fg_nodes(struct hdac_device *codec)
 362 {
 363         int i, total_nodes, function_id;
 364         hda_nid_t nid;
 365
 366         total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
 367         for (i = 0; i < total_nodes; i++, nid++) {
 368                 function_id = snd_hdac_read_parm(codec, nid,
 369                                                  AC_PAR_FUNCTION_TYPE);
 370                 switch (function_id & 0xff) {
 371                 case AC_GRP_AUDIO_FUNCTION:
 372                         codec->afg = nid;
 373                         codec->afg_function_id = function_id & 0xff;
 374                         codec->afg_unsol = (function_id >> 8) & 1;
 375                         break;
 376                 case AC_GRP_MODEM_FUNCTION:
 377                         codec->mfg = nid;
 378                         codec->mfg_function_id = function_id & 0xff;
 379                         codec->mfg_unsol = (function_id >> 8) & 1;
 380                         break;
 381                 default:
 382                         break;
 383                 }
 384         }
 385 }
 386
 387 /**
 388  * snd_hdac_refresh_widgets - Reset the widget start/end nodes
 389  * @codec: the codec object
 390  */
 391 int snd_hdac_refresh_widgets(struct hdac_device *codec)
 392 {
 393         hda_nid_t start_nid;
 394         int nums;
 395
 396         nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
 397         if (!start_nid || nums <= 0 || nums >= 0xff) {
 398                 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
 399                         codec->afg);
 400                 return -EINVAL;
 401         }
 402
 403         codec->num_nodes = nums;
 404         codec->start_nid = start_nid;
 405         codec->end_nid = start_nid + nums;
 406         return 0;
 407 }
 408 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
 409
 410 /**
 411  * snd_hdac_refresh_widget_sysfs - Reset the codec widgets and reinit the
 412  * codec sysfs
 413  * @codec: the codec object
 414  *
 415  * first we need to remove sysfs, then refresh widgets and lastly
 416  * recreate it
 417  */
 418 int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec)
 419 {
 420         int ret;
 421
 422         if (device_is_registered(&codec->dev))
 423                 hda_widget_sysfs_exit(codec);
 424         ret = snd_hdac_refresh_widgets(codec);
 425         if (ret) {
 426                 dev_err(&codec->dev, "failed to refresh widget: %d\n", ret);
 427                 return ret;
 428         }
 429         if (device_is_registered(&codec->dev)) {
 430                 ret = hda_widget_sysfs_init(codec);
 431                 if (ret) {
 432                         dev_err(&codec->dev, "failed to init sysfs: %d\n", ret);
 433                         return ret;
 434                 }
 435         }
 436         return ret;
 437 }
 438 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widget_sysfs);
 439
 440 /* return CONNLIST_LEN parameter of the given widget */
 441 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
 442 {
 443         unsigned int wcaps = get_wcaps(codec, nid);
 444         unsigned int parm;
 445
 446         if (!(wcaps & AC_WCAP_CONN_LIST) &&
 447             get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
 448                 return 0;
 449
 450         parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
 451         if (parm == -1)
 452                 parm = 0;
 453         return parm;
 454 }
 455
 456 /**
 457  * snd_hdac_get_connections - get a widget connection list
 458  * @codec: the codec object
 459  * @nid: NID
 460  * @conn_list: the array to store the results, can be NULL
 461  * @max_conns: the max size of the given array
 462  *
 463  * Returns the number of connected widgets, zero for no connection, or a
 464  * negative error code.  When the number of elements don't fit with the
 465  * given array size, it returns -ENOSPC.
 466  *
 467  * When @conn_list is NULL, it just checks the number of connections.
 468  */
 469 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 470                              hda_nid_t *conn_list, int max_conns)
 471 {
 472         unsigned int parm;
 473         int i, conn_len, conns, err;
 474         unsigned int shift, num_elems, mask;
 475         hda_nid_t prev_nid;
 476         int null_count = 0;
 477
 478         parm = get_num_conns(codec, nid);
 479         if (!parm)
 480                 return 0;
 481
 482         if (parm & AC_CLIST_LONG) {
 483                 /* long form */
 484                 shift = 16;
 485                 num_elems = 2;
 486         } else {
 487                 /* short form */
 488                 shift = 8;
 489                 num_elems = 4;
 490         }
 491         conn_len = parm & AC_CLIST_LENGTH;
 492         mask = (1 << (shift-1)) - 1;
 493
 494         if (!conn_len)
 495                 return 0; /* no connection */
 496
 497         if (conn_len == 1) {
 498                 /* single connection */
 499                 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
 500                                     &parm);
 501                 if (err < 0)
 502                         return err;
 503                 if (conn_list)
 504                         conn_list[0] = parm & mask;
 505                 return 1;
 506         }
 507
 508         /* multi connection */
 509         conns = 0;
 510         prev_nid = 0;
 511         for (i = 0; i < conn_len; i++) {
 512                 int range_val;
 513                 hda_nid_t val, n;
 514
 515                 if (i % num_elems == 0) {
 516                         err = snd_hdac_read(codec, nid,
 517                                             AC_VERB_GET_CONNECT_LIST, i,
 518                                             &parm);
 519                         if (err < 0)
 520                                 return -EIO;
 521                 }
 522                 range_val = !!(parm & (1 << (shift-1))); /* ranges */
 523                 val = parm & mask;
 524                 if (val == 0 && null_count++) {  /* no second chance */
 525                         dev_dbg(&codec->dev,
 526                                 "invalid CONNECT_LIST verb %x[%i]:%x\n",
 527                                 nid, i, parm);
 528                         return 0;
 529                 }
 530                 parm >>= shift;
 531                 if (range_val) {
 532                         /* ranges between the previous and this one */
 533                         if (!prev_nid || prev_nid >= val) {
 534                                 dev_warn(&codec->dev,
 535                                          "invalid dep_range_val %x:%x\n",
 536                                          prev_nid, val);
 537                                 continue;
 538                         }
 539                         for (n = prev_nid + 1; n <= val; n++) {
 540                                 if (conn_list) {
 541                                         if (conns >= max_conns)
 542                                                 return -ENOSPC;
 543                                         conn_list[conns] = n;
 544                                 }
 545                                 conns++;
 546                         }
 547                 } else {
 548                         if (conn_list) {
 549                                 if (conns >= max_conns)
 550                                         return -ENOSPC;
 551                                 conn_list[conns] = val;
 552                         }
 553                         conns++;
 554                 }
 555                 prev_nid = val;
 556         }
 557         return conns;
 558 }
 559 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
 560
 561 #ifdef CONFIG_PM
 562 /**
 563  * snd_hdac_power_up - power up the codec
 564  * @codec: the codec object
 565  *
 566  * This function calls the runtime PM helper to power up the given codec.
 567  * Unlike snd_hdac_power_up_pm(), you should call this only for the code
 568  * path that isn't included in PM path.  Otherwise it gets stuck.
 569  *
 570  * Returns zero if successful, or a negative error code.
 571  */
 572 int snd_hdac_power_up(struct hdac_device *codec)
 573 {
 574         return pm_runtime_get_sync(&codec->dev);
 575 }
 576 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
 577
 578 /**
 579  * snd_hdac_power_down - power down the codec
 580  * @codec: the codec object
 581  *
 582  * Returns zero if successful, or a negative error code.
 583  */
 584 int snd_hdac_power_down(struct hdac_device *codec)
 585 {
 586         struct device *dev = &codec->dev;
 587
 588         pm_runtime_mark_last_busy(dev);
 589         return pm_runtime_put_autosuspend(dev);
 590 }
 591 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
 592
 593 /**
 594  * snd_hdac_power_up_pm - power up the codec
 595  * @codec: the codec object
 596  *
 597  * This function can be called in a recursive code path like init code
 598  * which may be called by PM suspend/resume again.  OTOH, if a power-up
 599  * call must wake up the sleeper (e.g. in a kctl callback), use
 600  * snd_hdac_power_up() instead.
 601  *
 602  * Returns zero if successful, or a negative error code.
 603  */
 604 int snd_hdac_power_up_pm(struct hdac_device *codec)
 605 {
 606         if (!atomic_inc_not_zero(&codec->in_pm))
 607                 return snd_hdac_power_up(codec);
 608         return 0;
 609 }
 610 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
 611
 612 /* like snd_hdac_power_up_pm(), but only increment the pm count when
 613  * already powered up.  Returns -1 if not powered up, 1 if incremented
 614  * or 0 if unchanged.  Only used in hdac_regmap.c
 615  */
 616 int snd_hdac_keep_power_up(struct hdac_device *codec)
 617 {
 618         if (!atomic_inc_not_zero(&codec->in_pm)) {
 619                 int ret = pm_runtime_get_if_in_use(&codec->dev);
 620                 if (!ret)
 621                         return -1;
 622                 if (ret < 0)
 623                         return 0;
 624         }
 625         return 1;
 626 }
 627
 628 /**
 629  * snd_hdac_power_down_pm - power down the codec
 630  * @codec: the codec object
 631  *
 632  * Like snd_hdac_power_up_pm(), this function is used in a recursive
 633  * code path like init code which may be called by PM suspend/resume again.
 634  *
 635  * Returns zero if successful, or a negative error code.
 636  */
 637 int snd_hdac_power_down_pm(struct hdac_device *codec)
 638 {
 639         if (atomic_dec_if_positive(&codec->in_pm) < 0)
 640                 return snd_hdac_power_down(codec);
 641         return 0;
 642 }
 643 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
 644 #endif
 645
 646 /**
 647  * snd_hdac_link_power - Enable/disable the link power for a codec
 648  * @codec: the codec object
 649  * @bool: enable or disable the link power
 650  */
 651 int snd_hdac_link_power(struct hdac_device *codec, bool enable)
 652 {
 653         if  (!codec->link_power_control)
 654                 return 0;
 655
 656         if  (codec->bus->ops->link_power)
 657                 return codec->bus->ops->link_power(codec->bus, enable);
 658         else
 659                 return -EINVAL;
 660 }
 661 EXPORT_SYMBOL_GPL(snd_hdac_link_power);
 662
 663 /* codec vendor labels */
 664 struct hda_vendor_id {
 665         unsigned int id;
 666         const char *name;
 667 };
 668
 669 static struct hda_vendor_id hda_vendor_ids[] = {
 670         { 0x1002, "ATI" },
 671         { 0x1013, "Cirrus Logic" },
 672         { 0x1057, "Motorola" },
 673         { 0x1095, "Silicon Image" },
 674         { 0x10de, "Nvidia" },
 675         { 0x10ec, "Realtek" },
 676         { 0x1102, "Creative" },
 677         { 0x1106, "VIA" },
 678         { 0x111d, "IDT" },
 679         { 0x11c1, "LSI" },
 680         { 0x11d4, "Analog Devices" },
 681         { 0x13f6, "C-Media" },
 682         { 0x14f1, "Conexant" },
 683         { 0x17e8, "Chrontel" },
 684         { 0x1854, "LG" },
 685         { 0x1aec, "Wolfson Microelectronics" },
 686         { 0x1af4, "QEMU" },
 687         { 0x434d, "C-Media" },
 688         { 0x8086, "Intel" },
 689         { 0x8384, "SigmaTel" },
 690         {} /* terminator */
 691 };
 692
 693 /* store the codec vendor name */
 694 static int get_codec_vendor_name(struct hdac_device *codec)
 695 {
 696         const struct hda_vendor_id *c;
 697         u16 vendor_id = codec->vendor_id >> 16;
 698
 699         for (c = hda_vendor_ids; c->id; c++) {
 700                 if (c->id == vendor_id) {
 701                         codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
 702                         return codec->vendor_name ? 0 : -ENOMEM;
 703                 }
 704         }
 705
 706         codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
 707         return codec->vendor_name ? 0 : -ENOMEM;
 708 }
 709
 710 /*
 711  * stream formats
 712  */
 713 struct hda_rate_tbl {
 714         unsigned int hz;
 715         unsigned int alsa_bits;
 716         unsigned int hda_fmt;
 717 };
 718
 719 /* rate = base * mult / div */
 720 #define HDA_RATE(base, mult, div) \
 721         (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
 722          (((div) - 1) << AC_FMT_DIV_SHIFT))
 723
 724 static struct hda_rate_tbl rate_bits[] = {
 725         /* rate in Hz, ALSA rate bitmask, HDA format value */
 726
 727         /* autodetected value used in snd_hda_query_supported_pcm */
 728         { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
 729         { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
 730         { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
 731         { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
 732         { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
 733         { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
 734         { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
 735         { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
 736         { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
 737         { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
 738         { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
 739 #define AC_PAR_PCM_RATE_BITS    11
 740         /* up to bits 10, 384kHZ isn't supported properly */
 741
 742         /* not autodetected value */
 743         { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
 744
 745         { 0 } /* terminator */
 746 };
 747
 748 /**
 749  * snd_hdac_calc_stream_format - calculate the format bitset
 750  * @rate: the sample rate
 751  * @channels: the number of channels
 752  * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 753  * @maxbps: the max. bps
 754  * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
 755  *
 756  * Calculate the format bitset from the given rate, channels and th PCM format.
 757  *
 758  * Return zero if invalid.
 759  */
 760 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 761                                          unsigned int channels,
 762                                          unsigned int format,
 763                                          unsigned int maxbps,
 764                                          unsigned short spdif_ctls)
 765 {
 766         int i;
 767         unsigned int val = 0;
 768
 769         for (i = 0; rate_bits[i].hz; i++)
 770                 if (rate_bits[i].hz == rate) {
 771                         val = rate_bits[i].hda_fmt;
 772                         break;
 773                 }
 774         if (!rate_bits[i].hz)
 775                 return 0;
 776
 777         if (channels == 0 || channels > 8)
 778                 return 0;
 779         val |= channels - 1;
 780
 781         switch (snd_pcm_format_width(format)) {
 782         case 8:
 783                 val |= AC_FMT_BITS_8;
 784                 break;
 785         case 16:
 786                 val |= AC_FMT_BITS_16;
 787                 break;
 788         case 20:
 789         case 24:
 790         case 32:
 791                 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
 792                         val |= AC_FMT_BITS_32;
 793                 else if (maxbps >= 24)
 794                         val |= AC_FMT_BITS_24;
 795                 else
 796                         val |= AC_FMT_BITS_20;
 797                 break;
 798         default:
 799                 return 0;
 800         }
 801
 802         if (spdif_ctls & AC_DIG1_NONAUDIO)
 803                 val |= AC_FMT_TYPE_NON_PCM;
 804
 805         return val;
 806 }
 807 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
 808
 809 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
 810 {
 811         unsigned int val = 0;
 812
 813         if (nid != codec->afg &&
 814             (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
 815                 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
 816         if (!val || val == -1)
 817                 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
 818         if (!val || val == -1)
 819                 return 0;
 820         return val;
 821 }
 822
 823 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
 824 {
 825         unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
 826
 827         if (!streams || streams == -1)
 828                 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
 829         if (!streams || streams == -1)
 830                 return 0;
 831         return streams;
 832 }
 833
 834 /**
 835  * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
 836  * @codec: the codec object
 837  * @nid: NID to query
 838  * @ratesp: the pointer to store the detected rate bitflags
 839  * @formatsp: the pointer to store the detected formats
 840  * @bpsp: the pointer to store the detected format widths
 841  *
 842  * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 843  * or @bsps argument is ignored.
 844  *
 845  * Returns 0 if successful, otherwise a negative error code.
 846  */
 847 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 848                                  u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
 849 {
 850         unsigned int i, val, wcaps;
 851
 852         wcaps = get_wcaps(codec, nid);
 853         val = query_pcm_param(codec, nid);
 854
 855         if (ratesp) {
 856                 u32 rates = 0;
 857                 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
 858                         if (val & (1 << i))
 859                                 rates |= rate_bits[i].alsa_bits;
 860                 }
 861                 if (rates == 0) {
 862                         dev_err(&codec->dev,
 863                                 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
 864                                 nid, val,
 865                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
 866                         return -EIO;
 867                 }
 868                 *ratesp = rates;
 869         }
 870
 871         if (formatsp || bpsp) {
 872                 u64 formats = 0;
 873                 unsigned int streams, bps;
 874
 875                 streams = query_stream_param(codec, nid);
 876                 if (!streams)
 877                         return -EIO;
 878
 879                 bps = 0;
 880                 if (streams & AC_SUPFMT_PCM) {
 881                         if (val & AC_SUPPCM_BITS_8) {
 882                                 formats |= SNDRV_PCM_FMTBIT_U8;
 883                                 bps = 8;
 884                         }
 885                         if (val & AC_SUPPCM_BITS_16) {
 886                                 formats |= SNDRV_PCM_FMTBIT_S16_LE;
 887                                 bps = 16;
 888                         }
 889                         if (wcaps & AC_WCAP_DIGITAL) {
 890                                 if (val & AC_SUPPCM_BITS_32)
 891                                         formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
 892                                 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
 893                                         formats |= SNDRV_PCM_FMTBIT_S32_LE;
 894                                 if (val & AC_SUPPCM_BITS_24)
 895                                         bps = 24;
 896                                 else if (val & AC_SUPPCM_BITS_20)
 897                                         bps = 20;
 898                         } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
 899                                           AC_SUPPCM_BITS_32)) {
 900                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
 901                                 if (val & AC_SUPPCM_BITS_32)
 902                                         bps = 32;
 903                                 else if (val & AC_SUPPCM_BITS_24)
 904                                         bps = 24;
 905                                 else if (val & AC_SUPPCM_BITS_20)
 906                                         bps = 20;
 907                         }
 908                 }
 909 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
 910                 if (streams & AC_SUPFMT_FLOAT32) {
 911                         formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 912                         if (!bps)
 913                                 bps = 32;
 914                 }
 915 #endif
 916                 if (streams == AC_SUPFMT_AC3) {
 917                         /* should be exclusive */
 918                         /* temporary hack: we have still no proper support
 919                          * for the direct AC3 stream...
 920                          */
 921                         formats |= SNDRV_PCM_FMTBIT_U8;
 922                         bps = 8;
 923                 }
 924                 if (formats == 0) {
 925                         dev_err(&codec->dev,
 926                                 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
 927                                 nid, val,
 928                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
 929                                 streams);
 930                         return -EIO;
 931                 }
 932                 if (formatsp)
 933                         *formatsp = formats;
 934                 if (bpsp)
 935                         *bpsp = bps;
 936         }
 937
 938         return 0;
 939 }
 940 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
 941
 942 /**
 943  * snd_hdac_is_supported_format - Check the validity of the format
 944  * @codec: the codec object
 945  * @nid: NID to check
 946  * @format: the HD-audio format value to check
 947  *
 948  * Check whether the given node supports the format value.
 949  *
 950  * Returns true if supported, false if not.
 951  */
 952 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 953                                   unsigned int format)
 954 {
 955         int i;
 956         unsigned int val = 0, rate, stream;
 957
 958         val = query_pcm_param(codec, nid);
 959         if (!val)
 960                 return false;
 961
 962         rate = format & 0xff00;
 963         for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
 964                 if (rate_bits[i].hda_fmt == rate) {
 965                         if (val & (1 << i))
 966                                 break;
 967                         return false;
 968                 }
 969         if (i >= AC_PAR_PCM_RATE_BITS)
 970                 return false;
 971
 972         stream = query_stream_param(codec, nid);
 973         if (!stream)
 974                 return false;
 975
 976         if (stream & AC_SUPFMT_PCM) {
 977                 switch (format & 0xf0) {
 978                 case 0x00:
 979                         if (!(val & AC_SUPPCM_BITS_8))
 980                                 return false;
 981                         break;
 982                 case 0x10:
 983                         if (!(val & AC_SUPPCM_BITS_16))
 984                                 return false;
 985                         break;
 986                 case 0x20:
 987                         if (!(val & AC_SUPPCM_BITS_20))
 988                                 return false;
 989                         break;
 990                 case 0x30:
 991                         if (!(val & AC_SUPPCM_BITS_24))
 992                                 return false;
 993                         break;
 994                 case 0x40:
 995                         if (!(val & AC_SUPPCM_BITS_32))
 996                                 return false;
 997                         break;
 998                 default:
 999                         return false;
1000                 }
1001         } else {
1002                 /* FIXME: check for float32 and AC3? */
1003         }
1004
1005         return true;
1006 }
1007 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
1008
1009 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
1010                         int flags, unsigned int verb, unsigned int parm)
1011 {
1012         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1013         unsigned int res;
1014
1015         if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
1016                 return -1;
1017
1018         return res;
1019 }
1020
1021 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
1022                         int flags, unsigned int verb, unsigned int parm)
1023 {
1024         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1025
1026         return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
1027 }
1028
1029 /**
1030  * snd_hdac_codec_read - send a command and get the response
1031  * @hdac: the HDAC device
1032  * @nid: NID to send the command
1033  * @flags: optional bit flags
1034  * @verb: the verb to send
1035  * @parm: the parameter for the verb
1036  *
1037  * Send a single command and read the corresponding response.
1038  *
1039  * Returns the obtained response value, or -1 for an error.
1040  */
1041 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1042                         int flags, unsigned int verb, unsigned int parm)
1043 {
1044         return codec_read(hdac, nid, flags, verb, parm);
1045 }
1046 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1047
1048 /**
1049  * snd_hdac_codec_write - send a single command without waiting for response
1050  * @hdac: the HDAC device
1051  * @nid: NID to send the command
1052  * @flags: optional bit flags
1053  * @verb: the verb to send
1054  * @parm: the parameter for the verb
1055  *
1056  * Send a single command without waiting for response.
1057  *
1058  * Returns 0 if successful, or a negative error code.
1059  */
1060 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1061                         int flags, unsigned int verb, unsigned int parm)
1062 {
1063         return codec_write(hdac, nid, flags, verb, parm);
1064 }
1065 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1066
1067 /**
1068  * snd_hdac_check_power_state - check whether the actual power state matches
1069  * with the target state
1070  *
1071  * @hdac: the HDAC device
1072  * @nid: NID to send the command
1073  * @target_state: target state to check for
1074  *
1075  * Return true if state matches, false if not
1076  */
1077 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1078                 hda_nid_t nid, unsigned int target_state)
1079 {
1080         unsigned int state = codec_read(hdac, nid, 0,
1081                                 AC_VERB_GET_POWER_STATE, 0);
1082
1083         if (state & AC_PWRST_ERROR)
1084                 return true;
1085         state = (state >> 4) & 0x0f;
1086         return (state == target_state);
1087 }
1088 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);