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         /* keep balance of runtime PM child_count in parent device */
 127         pm_runtime_set_suspended(&codec->dev);
 128         snd_hdac_bus_remove_device(codec->bus, codec);
 129         kfree(codec->vendor_name);
 130         kfree(codec->chip_name);
 131 }
 132 EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
 133
 134 /**
 135  * snd_hdac_device_register - register the hd-audio codec base device
 136  * codec: the device to register
 137  */
 138 int snd_hdac_device_register(struct hdac_device *codec)
 139 {
 140         int err;
 141
 142         err = device_add(&codec->dev);
 143         if (err < 0)
 144                 return err;
 145         err = hda_widget_sysfs_init(codec);
 146         if (err < 0) {
 147                 device_del(&codec->dev);
 148                 return err;
 149         }
 150
 151         return 0;
 152 }
 153 EXPORT_SYMBOL_GPL(snd_hdac_device_register);
 154
 155 /**
 156  * snd_hdac_device_unregister - unregister the hd-audio codec base device
 157  * codec: the device to unregister
 158  */
 159 void snd_hdac_device_unregister(struct hdac_device *codec)
 160 {
 161         if (device_is_registered(&codec->dev)) {
 162                 hda_widget_sysfs_exit(codec);
 163                 device_del(&codec->dev);
 164                 snd_hdac_bus_remove_device(codec->bus, codec);
 165         }
 166 }
 167 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
 168
 169 /**
 170  * snd_hdac_device_set_chip_name - set/update the codec name
 171  * @codec: the HDAC device
 172  * @name: name string to set
 173  *
 174  * Returns 0 if the name is set or updated, or a negative error code.
 175  */
 176 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
 177 {
 178         char *newname;
 179
 180         if (!name)
 181                 return 0;
 182         newname = kstrdup(name, GFP_KERNEL);
 183         if (!newname)
 184                 return -ENOMEM;
 185         kfree(codec->chip_name);
 186         codec->chip_name = newname;
 187         return 0;
 188 }
 189 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
 190
 191 /**
 192  * snd_hdac_codec_modalias - give the module alias name
 193  * @codec: HDAC device
 194  * @buf: string buffer to store
 195  * @size: string buffer size
 196  *
 197  * Returns the size of string, like snprintf(), or a negative error code.
 198  */
 199 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
 200 {
 201         return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
 202                         codec->vendor_id, codec->revision_id, codec->type);
 203 }
 204 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
 205
 206 /**
 207  * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
 208  *      HD-audio controller
 209  * @codec: the codec object
 210  * @nid: NID to encode
 211  * @verb: verb to encode
 212  * @parm: parameter to encode
 213  *
 214  * Return an encoded command verb or -1 for error.
 215  */
 216 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
 217                                unsigned int verb, unsigned int parm)
 218 {
 219         u32 val, addr;
 220
 221         addr = codec->addr;
 222         if ((addr & ~0xf) || (nid & ~0x7f) ||
 223             (verb & ~0xfff) || (parm & ~0xffff)) {
 224                 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
 225                         addr, nid, verb, parm);
 226                 return -1;
 227         }
 228
 229         val = addr << 28;
 230         val |= (u32)nid << 20;
 231         val |= verb << 8;
 232         val |= parm;
 233         return val;
 234 }
 235 EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
 236
 237 /**
 238  * snd_hdac_exec_verb - execute an encoded verb
 239  * @codec: the codec object
 240  * @cmd: encoded verb to execute
 241  * @flags: optional flags, pass zero for default
 242  * @res: the pointer to store the result, NULL if running async
 243  *
 244  * Returns zero if successful, or a negative error code.
 245  *
 246  * This calls the exec_verb op when set in hdac_codec.  If not,
 247  * call the default snd_hdac_bus_exec_verb().
 248  */
 249 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
 250                        unsigned int flags, unsigned int *res)
 251 {
 252         if (codec->exec_verb)
 253                 return codec->exec_verb(codec, cmd, flags, res);
 254         return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
 255 }
 256 EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
 257
 258
 259 /**
 260  * snd_hdac_read - execute a verb
 261  * @codec: the codec object
 262  * @nid: NID to execute a verb
 263  * @verb: verb to execute
 264  * @parm: parameter for a verb
 265  * @res: the pointer to store the result, NULL if running async
 266  *
 267  * Returns zero if successful, or a negative error code.
 268  */
 269 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
 270                   unsigned int verb, unsigned int parm, unsigned int *res)
 271 {
 272         unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
 273
 274         return snd_hdac_exec_verb(codec, cmd, 0, res);
 275 }
 276 EXPORT_SYMBOL_GPL(snd_hdac_read);
 277
 278 /**
 279  * _snd_hdac_read_parm - read a parmeter
 280  *
 281  * This function returns zero or an error unlike snd_hdac_read_parm().
 282  */
 283 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
 284                         unsigned int *res)
 285 {
 286         unsigned int cmd;
 287
 288         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 289         return snd_hdac_regmap_read_raw(codec, cmd, res);
 290 }
 291 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
 292
 293 /**
 294  * snd_hdac_read_parm_uncached - read a codec parameter without caching
 295  * @codec: the codec object
 296  * @nid: NID to read a parameter
 297  * @parm: parameter to read
 298  *
 299  * Returns -1 for error.  If you need to distinguish the error more
 300  * strictly, use snd_hdac_read() directly.
 301  */
 302 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
 303                                 int parm)
 304 {
 305         unsigned int cmd, val;
 306
 307         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 308         if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
 309                 return -1;
 310         return val;
 311 }
 312 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
 313
 314 /**
 315  * snd_hdac_override_parm - override read-only parameters
 316  * @codec: the codec object
 317  * @nid: NID for the parameter
 318  * @parm: the parameter to change
 319  * @val: the parameter value to overwrite
 320  */
 321 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
 322                            unsigned int parm, unsigned int val)
 323 {
 324         unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
 325         int err;
 326
 327         if (!codec->regmap)
 328                 return -EINVAL;
 329
 330         codec->caps_overwriting = true;
 331         err = snd_hdac_regmap_write_raw(codec, verb, val);
 332         codec->caps_overwriting = false;
 333         return err;
 334 }
 335 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
 336
 337 /**
 338  * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
 339  * @codec: the codec object
 340  * @nid: NID to inspect
 341  * @start_id: the pointer to store the starting NID
 342  *
 343  * Returns the number of subtree nodes or zero if not found.
 344  * This function reads parameters always without caching.
 345  */
 346 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 347                            hda_nid_t *start_id)
 348 {
 349         unsigned int parm;
 350
 351         parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
 352         if (parm == -1) {
 353                 *start_id = 0;
 354                 return 0;
 355         }
 356         *start_id = (parm >> 16) & 0x7fff;
 357         return (int)(parm & 0x7fff);
 358 }
 359 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
 360
 361 /*
 362  * look for an AFG and MFG nodes
 363  */
 364 static void setup_fg_nodes(struct hdac_device *codec)
 365 {
 366         int i, total_nodes, function_id;
 367         hda_nid_t nid;
 368
 369         total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
 370         for (i = 0; i < total_nodes; i++, nid++) {
 371                 function_id = snd_hdac_read_parm(codec, nid,
 372                                                  AC_PAR_FUNCTION_TYPE);
 373                 switch (function_id & 0xff) {
 374                 case AC_GRP_AUDIO_FUNCTION:
 375                         codec->afg = nid;
 376                         codec->afg_function_id = function_id & 0xff;
 377                         codec->afg_unsol = (function_id >> 8) & 1;
 378                         break;
 379                 case AC_GRP_MODEM_FUNCTION:
 380                         codec->mfg = nid;
 381                         codec->mfg_function_id = function_id & 0xff;
 382                         codec->mfg_unsol = (function_id >> 8) & 1;
 383                         break;
 384                 default:
 385                         break;
 386                 }
 387         }
 388 }
 389
 390 /**
 391  * snd_hdac_refresh_widgets - Reset the widget start/end nodes
 392  * @codec: the codec object
 393  */
 394 int snd_hdac_refresh_widgets(struct hdac_device *codec)
 395 {
 396         hda_nid_t start_nid;
 397         int nums;
 398
 399         nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
 400         if (!start_nid || nums <= 0 || nums >= 0xff) {
 401                 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
 402                         codec->afg);
 403                 return -EINVAL;
 404         }
 405
 406         codec->num_nodes = nums;
 407         codec->start_nid = start_nid;
 408         codec->end_nid = start_nid + nums;
 409         return 0;
 410 }
 411 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
 412
 413 /**
 414  * snd_hdac_refresh_widget_sysfs - Reset the codec widgets and reinit the
 415  * codec sysfs
 416  * @codec: the codec object
 417  *
 418  * first we need to remove sysfs, then refresh widgets and lastly
 419  * recreate it
 420  */
 421 int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec)
 422 {
 423         int ret;
 424
 425         if (device_is_registered(&codec->dev))
 426                 hda_widget_sysfs_exit(codec);
 427         ret = snd_hdac_refresh_widgets(codec);
 428         if (ret) {
 429                 dev_err(&codec->dev, "failed to refresh widget: %d\n", ret);
 430                 return ret;
 431         }
 432         if (device_is_registered(&codec->dev)) {
 433                 ret = hda_widget_sysfs_init(codec);
 434                 if (ret) {
 435                         dev_err(&codec->dev, "failed to init sysfs: %d\n", ret);
 436                         return ret;
 437                 }
 438         }
 439         return ret;
 440 }
 441 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widget_sysfs);
 442
 443 /* return CONNLIST_LEN parameter of the given widget */
 444 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
 445 {
 446         unsigned int wcaps = get_wcaps(codec, nid);
 447         unsigned int parm;
 448
 449         if (!(wcaps & AC_WCAP_CONN_LIST) &&
 450             get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
 451                 return 0;
 452
 453         parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
 454         if (parm == -1)
 455                 parm = 0;
 456         return parm;
 457 }
 458
 459 /**
 460  * snd_hdac_get_connections - get a widget connection list
 461  * @codec: the codec object
 462  * @nid: NID
 463  * @conn_list: the array to store the results, can be NULL
 464  * @max_conns: the max size of the given array
 465  *
 466  * Returns the number of connected widgets, zero for no connection, or a
 467  * negative error code.  When the number of elements don't fit with the
 468  * given array size, it returns -ENOSPC.
 469  *
 470  * When @conn_list is NULL, it just checks the number of connections.
 471  */
 472 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 473                              hda_nid_t *conn_list, int max_conns)
 474 {
 475         unsigned int parm;
 476         int i, conn_len, conns, err;
 477         unsigned int shift, num_elems, mask;
 478         hda_nid_t prev_nid;
 479         int null_count = 0;
 480
 481         parm = get_num_conns(codec, nid);
 482         if (!parm)
 483                 return 0;
 484
 485         if (parm & AC_CLIST_LONG) {
 486                 /* long form */
 487                 shift = 16;
 488                 num_elems = 2;
 489         } else {
 490                 /* short form */
 491                 shift = 8;
 492                 num_elems = 4;
 493         }
 494         conn_len = parm & AC_CLIST_LENGTH;
 495         mask = (1 << (shift-1)) - 1;
 496
 497         if (!conn_len)
 498                 return 0; /* no connection */
 499
 500         if (conn_len == 1) {
 501                 /* single connection */
 502                 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
 503                                     &parm);
 504                 if (err < 0)
 505                         return err;
 506                 if (conn_list)
 507                         conn_list[0] = parm & mask;
 508                 return 1;
 509         }
 510
 511         /* multi connection */
 512         conns = 0;
 513         prev_nid = 0;
 514         for (i = 0; i < conn_len; i++) {
 515                 int range_val;
 516                 hda_nid_t val, n;
 517
 518                 if (i % num_elems == 0) {
 519                         err = snd_hdac_read(codec, nid,
 520                                             AC_VERB_GET_CONNECT_LIST, i,
 521                                             &parm);
 522                         if (err < 0)
 523                                 return -EIO;
 524                 }
 525                 range_val = !!(parm & (1 << (shift-1))); /* ranges */
 526                 val = parm & mask;
 527                 if (val == 0 && null_count++) {  /* no second chance */
 528                         dev_dbg(&codec->dev,
 529                                 "invalid CONNECT_LIST verb %x[%i]:%x\n",
 530                                 nid, i, parm);
 531                         return 0;
 532                 }
 533                 parm >>= shift;
 534                 if (range_val) {
 535                         /* ranges between the previous and this one */
 536                         if (!prev_nid || prev_nid >= val) {
 537                                 dev_warn(&codec->dev,
 538                                          "invalid dep_range_val %x:%x\n",
 539                                          prev_nid, val);
 540                                 continue;
 541                         }
 542                         for (n = prev_nid + 1; n <= val; n++) {
 543                                 if (conn_list) {
 544                                         if (conns >= max_conns)
 545                                                 return -ENOSPC;
 546                                         conn_list[conns] = n;
 547                                 }
 548                                 conns++;
 549                         }
 550                 } else {
 551                         if (conn_list) {
 552                                 if (conns >= max_conns)
 553                                         return -ENOSPC;
 554                                 conn_list[conns] = val;
 555                         }
 556                         conns++;
 557                 }
 558                 prev_nid = val;
 559         }
 560         return conns;
 561 }
 562 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
 563
 564 #ifdef CONFIG_PM
 565 /**
 566  * snd_hdac_power_up - power up the codec
 567  * @codec: the codec object
 568  *
 569  * This function calls the runtime PM helper to power up the given codec.
 570  * Unlike snd_hdac_power_up_pm(), you should call this only for the code
 571  * path that isn't included in PM path.  Otherwise it gets stuck.
 572  *
 573  * Returns zero if successful, or a negative error code.
 574  */
 575 int snd_hdac_power_up(struct hdac_device *codec)
 576 {
 577         return pm_runtime_get_sync(&codec->dev);
 578 }
 579 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
 580
 581 /**
 582  * snd_hdac_power_down - power down the codec
 583  * @codec: the codec object
 584  *
 585  * Returns zero if successful, or a negative error code.
 586  */
 587 int snd_hdac_power_down(struct hdac_device *codec)
 588 {
 589         struct device *dev = &codec->dev;
 590
 591         pm_runtime_mark_last_busy(dev);
 592         return pm_runtime_put_autosuspend(dev);
 593 }
 594 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
 595
 596 /**
 597  * snd_hdac_power_up_pm - power up the codec
 598  * @codec: the codec object
 599  *
 600  * This function can be called in a recursive code path like init code
 601  * which may be called by PM suspend/resume again.  OTOH, if a power-up
 602  * call must wake up the sleeper (e.g. in a kctl callback), use
 603  * snd_hdac_power_up() instead.
 604  *
 605  * Returns zero if successful, or a negative error code.
 606  */
 607 int snd_hdac_power_up_pm(struct hdac_device *codec)
 608 {
 609         if (!atomic_inc_not_zero(&codec->in_pm))
 610                 return snd_hdac_power_up(codec);
 611         return 0;
 612 }
 613 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
 614
 615 /* like snd_hdac_power_up_pm(), but only increment the pm count when
 616  * already powered up.  Returns -1 if not powered up, 1 if incremented
 617  * or 0 if unchanged.  Only used in hdac_regmap.c
 618  */
 619 int snd_hdac_keep_power_up(struct hdac_device *codec)
 620 {
 621         if (!atomic_inc_not_zero(&codec->in_pm)) {
 622                 int ret = pm_runtime_get_if_in_use(&codec->dev);
 623                 if (!ret)
 624                         return -1;
 625                 if (ret < 0)
 626                         return 0;
 627         }
 628         return 1;
 629 }
 630
 631 /**
 632  * snd_hdac_power_down_pm - power down the codec
 633  * @codec: the codec object
 634  *
 635  * Like snd_hdac_power_up_pm(), this function is used in a recursive
 636  * code path like init code which may be called by PM suspend/resume again.
 637  *
 638  * Returns zero if successful, or a negative error code.
 639  */
 640 int snd_hdac_power_down_pm(struct hdac_device *codec)
 641 {
 642         if (atomic_dec_if_positive(&codec->in_pm) < 0)
 643                 return snd_hdac_power_down(codec);
 644         return 0;
 645 }
 646 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
 647 #endif
 648
 649 /**
 650  * snd_hdac_link_power - Enable/disable the link power for a codec
 651  * @codec: the codec object
 652  * @bool: enable or disable the link power
 653  */
 654 int snd_hdac_link_power(struct hdac_device *codec, bool enable)
 655 {
 656         if  (!codec->link_power_control)
 657                 return 0;
 658
 659         if  (codec->bus->ops->link_power)
 660                 return codec->bus->ops->link_power(codec->bus, enable);
 661         else
 662                 return -EINVAL;
 663 }
 664 EXPORT_SYMBOL_GPL(snd_hdac_link_power);
 665
 666 /* codec vendor labels */
 667 struct hda_vendor_id {
 668         unsigned int id;
 669         const char *name;
 670 };
 671
 672 static struct hda_vendor_id hda_vendor_ids[] = {
 673         { 0x1002, "ATI" },
 674         { 0x1013, "Cirrus Logic" },
 675         { 0x1057, "Motorola" },
 676         { 0x1095, "Silicon Image" },
 677         { 0x10de, "Nvidia" },
 678         { 0x10ec, "Realtek" },
 679         { 0x1102, "Creative" },
 680         { 0x1106, "VIA" },
 681         { 0x111d, "IDT" },
 682         { 0x11c1, "LSI" },
 683         { 0x11d4, "Analog Devices" },
 684         { 0x13f6, "C-Media" },
 685         { 0x14f1, "Conexant" },
 686         { 0x17e8, "Chrontel" },
 687         { 0x1854, "LG" },
 688         { 0x1aec, "Wolfson Microelectronics" },
 689         { 0x1af4, "QEMU" },
 690         { 0x434d, "C-Media" },
 691         { 0x8086, "Intel" },
 692         { 0x8384, "SigmaTel" },
 693         {} /* terminator */
 694 };
 695
 696 /* store the codec vendor name */
 697 static int get_codec_vendor_name(struct hdac_device *codec)
 698 {
 699         const struct hda_vendor_id *c;
 700         u16 vendor_id = codec->vendor_id >> 16;
 701
 702         for (c = hda_vendor_ids; c->id; c++) {
 703                 if (c->id == vendor_id) {
 704                         codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
 705                         return codec->vendor_name ? 0 : -ENOMEM;
 706                 }
 707         }
 708
 709         codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
 710         return codec->vendor_name ? 0 : -ENOMEM;
 711 }
 712
 713 /*
 714  * stream formats
 715  */
 716 struct hda_rate_tbl {
 717         unsigned int hz;
 718         unsigned int alsa_bits;
 719         unsigned int hda_fmt;
 720 };
 721
 722 /* rate = base * mult / div */
 723 #define HDA_RATE(base, mult, div) \
 724         (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
 725          (((div) - 1) << AC_FMT_DIV_SHIFT))
 726
 727 static struct hda_rate_tbl rate_bits[] = {
 728         /* rate in Hz, ALSA rate bitmask, HDA format value */
 729
 730         /* autodetected value used in snd_hda_query_supported_pcm */
 731         { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
 732         { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
 733         { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
 734         { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
 735         { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
 736         { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
 737         { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
 738         { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
 739         { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
 740         { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
 741         { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
 742 #define AC_PAR_PCM_RATE_BITS    11
 743         /* up to bits 10, 384kHZ isn't supported properly */
 744
 745         /* not autodetected value */
 746         { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
 747
 748         { 0 } /* terminator */
 749 };
 750
 751 /**
 752  * snd_hdac_calc_stream_format - calculate the format bitset
 753  * @rate: the sample rate
 754  * @channels: the number of channels
 755  * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 756  * @maxbps: the max. bps
 757  * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
 758  *
 759  * Calculate the format bitset from the given rate, channels and th PCM format.
 760  *
 761  * Return zero if invalid.
 762  */
 763 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 764                                          unsigned int channels,
 765                                          unsigned int format,
 766                                          unsigned int maxbps,
 767                                          unsigned short spdif_ctls)
 768 {
 769         int i;
 770         unsigned int val = 0;
 771
 772         for (i = 0; rate_bits[i].hz; i++)
 773                 if (rate_bits[i].hz == rate) {
 774                         val = rate_bits[i].hda_fmt;
 775                         break;
 776                 }
 777         if (!rate_bits[i].hz)
 778                 return 0;
 779
 780         if (channels == 0 || channels > 8)
 781                 return 0;
 782         val |= channels - 1;
 783
 784         switch (snd_pcm_format_width(format)) {
 785         case 8:
 786                 val |= AC_FMT_BITS_8;
 787                 break;
 788         case 16:
 789                 val |= AC_FMT_BITS_16;
 790                 break;
 791         case 20:
 792         case 24:
 793         case 32:
 794                 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
 795                         val |= AC_FMT_BITS_32;
 796                 else if (maxbps >= 24)
 797                         val |= AC_FMT_BITS_24;
 798                 else
 799                         val |= AC_FMT_BITS_20;
 800                 break;
 801         default:
 802                 return 0;
 803         }
 804
 805         if (spdif_ctls & AC_DIG1_NONAUDIO)
 806                 val |= AC_FMT_TYPE_NON_PCM;
 807
 808         return val;
 809 }
 810 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
 811
 812 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
 813 {
 814         unsigned int val = 0;
 815
 816         if (nid != codec->afg &&
 817             (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
 818                 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
 819         if (!val || val == -1)
 820                 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
 821         if (!val || val == -1)
 822                 return 0;
 823         return val;
 824 }
 825
 826 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
 827 {
 828         unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
 829
 830         if (!streams || streams == -1)
 831                 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
 832         if (!streams || streams == -1)
 833                 return 0;
 834         return streams;
 835 }
 836
 837 /**
 838  * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
 839  * @codec: the codec object
 840  * @nid: NID to query
 841  * @ratesp: the pointer to store the detected rate bitflags
 842  * @formatsp: the pointer to store the detected formats
 843  * @bpsp: the pointer to store the detected format widths
 844  *
 845  * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 846  * or @bsps argument is ignored.
 847  *
 848  * Returns 0 if successful, otherwise a negative error code.
 849  */
 850 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 851                                  u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
 852 {
 853         unsigned int i, val, wcaps;
 854
 855         wcaps = get_wcaps(codec, nid);
 856         val = query_pcm_param(codec, nid);
 857
 858         if (ratesp) {
 859                 u32 rates = 0;
 860                 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
 861                         if (val & (1 << i))
 862                                 rates |= rate_bits[i].alsa_bits;
 863                 }
 864                 if (rates == 0) {
 865                         dev_err(&codec->dev,
 866                                 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
 867                                 nid, val,
 868                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
 869                         return -EIO;
 870                 }
 871                 *ratesp = rates;
 872         }
 873
 874         if (formatsp || bpsp) {
 875                 u64 formats = 0;
 876                 unsigned int streams, bps;
 877
 878                 streams = query_stream_param(codec, nid);
 879                 if (!streams)
 880                         return -EIO;
 881
 882                 bps = 0;
 883                 if (streams & AC_SUPFMT_PCM) {
 884                         if (val & AC_SUPPCM_BITS_8) {
 885                                 formats |= SNDRV_PCM_FMTBIT_U8;
 886                                 bps = 8;
 887                         }
 888                         if (val & AC_SUPPCM_BITS_16) {
 889                                 formats |= SNDRV_PCM_FMTBIT_S16_LE;
 890                                 bps = 16;
 891                         }
 892                         if (wcaps & AC_WCAP_DIGITAL) {
 893                                 if (val & AC_SUPPCM_BITS_32)
 894                                         formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
 895                                 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
 896                                         formats |= SNDRV_PCM_FMTBIT_S32_LE;
 897                                 if (val & AC_SUPPCM_BITS_24)
 898                                         bps = 24;
 899                                 else if (val & AC_SUPPCM_BITS_20)
 900                                         bps = 20;
 901                         } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
 902                                           AC_SUPPCM_BITS_32)) {
 903                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
 904                                 if (val & AC_SUPPCM_BITS_32)
 905                                         bps = 32;
 906                                 else if (val & AC_SUPPCM_BITS_24)
 907                                         bps = 24;
 908                                 else if (val & AC_SUPPCM_BITS_20)
 909                                         bps = 20;
 910                         }
 911                 }
 912 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
 913                 if (streams & AC_SUPFMT_FLOAT32) {
 914                         formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 915                         if (!bps)
 916                                 bps = 32;
 917                 }
 918 #endif
 919                 if (streams == AC_SUPFMT_AC3) {
 920                         /* should be exclusive */
 921                         /* temporary hack: we have still no proper support
 922                          * for the direct AC3 stream...
 923                          */
 924                         formats |= SNDRV_PCM_FMTBIT_U8;
 925                         bps = 8;
 926                 }
 927                 if (formats == 0) {
 928                         dev_err(&codec->dev,
 929                                 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
 930                                 nid, val,
 931                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
 932                                 streams);
 933                         return -EIO;
 934                 }
 935                 if (formatsp)
 936                         *formatsp = formats;
 937                 if (bpsp)
 938                         *bpsp = bps;
 939         }
 940
 941         return 0;
 942 }
 943 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
 944
 945 /**
 946  * snd_hdac_is_supported_format - Check the validity of the format
 947  * @codec: the codec object
 948  * @nid: NID to check
 949  * @format: the HD-audio format value to check
 950  *
 951  * Check whether the given node supports the format value.
 952  *
 953  * Returns true if supported, false if not.
 954  */
 955 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 956                                   unsigned int format)
 957 {
 958         int i;
 959         unsigned int val = 0, rate, stream;
 960
 961         val = query_pcm_param(codec, nid);
 962         if (!val)
 963                 return false;
 964
 965         rate = format & 0xff00;
 966         for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
 967                 if (rate_bits[i].hda_fmt == rate) {
 968                         if (val & (1 << i))
 969                                 break;
 970                         return false;
 971                 }
 972         if (i >= AC_PAR_PCM_RATE_BITS)
 973                 return false;
 974
 975         stream = query_stream_param(codec, nid);
 976         if (!stream)
 977                 return false;
 978
 979         if (stream & AC_SUPFMT_PCM) {
 980                 switch (format & 0xf0) {
 981                 case 0x00:
 982                         if (!(val & AC_SUPPCM_BITS_8))
 983                                 return false;
 984                         break;
 985                 case 0x10:
 986                         if (!(val & AC_SUPPCM_BITS_16))
 987                                 return false;
 988                         break;
 989                 case 0x20:
 990                         if (!(val & AC_SUPPCM_BITS_20))
 991                                 return false;
 992                         break;
 993                 case 0x30:
 994                         if (!(val & AC_SUPPCM_BITS_24))
 995                                 return false;
 996                         break;
 997                 case 0x40:
 998                         if (!(val & AC_SUPPCM_BITS_32))
 999                                 return false;
1000                         break;
1001                 default:
1002                         return false;
1003                 }
1004         } else {
1005                 /* FIXME: check for float32 and AC3? */
1006         }
1007
1008         return true;
1009 }
1010 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
1011
1012 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
1013                         int flags, unsigned int verb, unsigned int parm)
1014 {
1015         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1016         unsigned int res;
1017
1018         if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
1019                 return -1;
1020
1021         return res;
1022 }
1023
1024 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
1025                         int flags, unsigned int verb, unsigned int parm)
1026 {
1027         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1028
1029         return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
1030 }
1031
1032 /**
1033  * snd_hdac_codec_read - send a command and get the response
1034  * @hdac: the HDAC device
1035  * @nid: NID to send the command
1036  * @flags: optional bit flags
1037  * @verb: the verb to send
1038  * @parm: the parameter for the verb
1039  *
1040  * Send a single command and read the corresponding response.
1041  *
1042  * Returns the obtained response value, or -1 for an error.
1043  */
1044 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1045                         int flags, unsigned int verb, unsigned int parm)
1046 {
1047         return codec_read(hdac, nid, flags, verb, parm);
1048 }
1049 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1050
1051 /**
1052  * snd_hdac_codec_write - send a single command without waiting for response
1053  * @hdac: the HDAC device
1054  * @nid: NID to send the command
1055  * @flags: optional bit flags
1056  * @verb: the verb to send
1057  * @parm: the parameter for the verb
1058  *
1059  * Send a single command without waiting for response.
1060  *
1061  * Returns 0 if successful, or a negative error code.
1062  */
1063 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1064                         int flags, unsigned int verb, unsigned int parm)
1065 {
1066         return codec_write(hdac, nid, flags, verb, parm);
1067 }
1068 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1069
1070 /**
1071  * snd_hdac_check_power_state - check whether the actual power state matches
1072  * with the target state
1073  *
1074  * @hdac: the HDAC device
1075  * @nid: NID to send the command
1076  * @target_state: target state to check for
1077  *
1078  * Return true if state matches, false if not
1079  */
1080 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1081                 hda_nid_t nid, unsigned int target_state)
1082 {
1083         unsigned int state = codec_read(hdac, nid, 0,
1084                                 AC_VERB_GET_POWER_STATE, 0);
1085
1086         if (state & AC_PWRST_ERROR)
1087                 return true;
1088         state = (state >> 4) & 0x0f;
1089         return (state == target_state);
1090 }
1091 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);