sound/hda/hdac_device.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * HD-audio codec core device
   4  */
   5
   6 #include <linux/init.h>
   7 #include <linux/delay.h>
   8 #include <linux/device.h>
   9 #include <linux/slab.h>
  10 #include <linux/module.h>
  11 #include <linux/export.h>
  12 #include <linux/pm_runtime.h>
  13 #include <sound/hdaudio.h>
  14 #include <sound/hda_regmap.h>
  15 #include <sound/pcm.h>
  16 #include "local.h"
  17
  18 static void setup_fg_nodes(struct hdac_device *codec);
  19 static int get_codec_vendor_name(struct hdac_device *codec);
  20
  21 static void default_release(struct device *dev)
  22 {
  23         snd_hdac_device_exit(container_of(dev, struct hdac_device, dev));
  24 }
  25
  26 /**
  27  * snd_hdac_device_init - initialize the HD-audio codec base device
  28  * @codec: device to initialize
  29  * @bus: but to attach
  30  * @name: device name string
  31  * @addr: codec address
  32  *
  33  * Returns zero for success or a negative error code.
  34  *
  35  * This function increments the runtime PM counter and marks it active.
  36  * The caller needs to turn it off appropriately later.
  37  *
  38  * The caller needs to set the device's release op properly by itself.
  39  */
  40 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
  41                          const char *name, unsigned int addr)
  42 {
  43         struct device *dev;
  44         hda_nid_t fg;
  45         int err;
  46
  47         dev = &codec->dev;
  48         device_initialize(dev);
  49         dev->parent = bus->dev;
  50         dev->bus = &snd_hda_bus_type;
  51         dev->release = default_release;
  52         dev->groups = hdac_dev_attr_groups;
  53         dev_set_name(dev, "%s", name);
  54         device_enable_async_suspend(dev);
  55
  56         codec->bus = bus;
  57         codec->addr = addr;
  58         codec->type = HDA_DEV_CORE;
  59         mutex_init(&codec->widget_lock);
  60         pm_runtime_set_active(&codec->dev);
  61         pm_runtime_get_noresume(&codec->dev);
  62         atomic_set(&codec->in_pm, 0);
  63
  64         err = snd_hdac_bus_add_device(bus, codec);
  65         if (err < 0)
  66                 goto error;
  67
  68         /* fill parameters */
  69         codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  70                                               AC_PAR_VENDOR_ID);
  71         if (codec->vendor_id == -1) {
  72                 /* read again, hopefully the access method was corrected
  73                  * in the last read...
  74                  */
  75                 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  76                                                       AC_PAR_VENDOR_ID);
  77         }
  78
  79         codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  80                                                  AC_PAR_SUBSYSTEM_ID);
  81         codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  82                                                 AC_PAR_REV_ID);
  83
  84         setup_fg_nodes(codec);
  85         if (!codec->afg && !codec->mfg) {
  86                 dev_err(dev, "no AFG or MFG node found\n");
  87                 err = -ENODEV;
  88                 goto error;
  89         }
  90
  91         fg = codec->afg ? codec->afg : codec->mfg;
  92
  93         err = snd_hdac_refresh_widgets(codec, false);
  94         if (err < 0)
  95                 goto error;
  96
  97         codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
  98         /* reread ssid if not set by parameter */
  99         if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
 100                 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
 101                               &codec->subsystem_id);
 102
 103         err = get_codec_vendor_name(codec);
 104         if (err < 0)
 105                 goto error;
 106
 107         codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
 108                                      codec->vendor_id & 0xffff);
 109         if (!codec->chip_name) {
 110                 err = -ENOMEM;
 111                 goto error;
 112         }
 113
 114         return 0;
 115
 116  error:
 117         put_device(&codec->dev);
 118         return err;
 119 }
 120 EXPORT_SYMBOL_GPL(snd_hdac_device_init);
 121
 122 /**
 123  * snd_hdac_device_exit - clean up the HD-audio codec base device
 124  * @codec: device to clean up
 125  */
 126 void snd_hdac_device_exit(struct hdac_device *codec)
 127 {
 128         pm_runtime_put_noidle(&codec->dev);
 129         snd_hdac_bus_remove_device(codec->bus, codec);
 130         kfree(codec->vendor_name);
 131         kfree(codec->chip_name);
 132 }
 133 EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
 134
 135 /**
 136  * snd_hdac_device_register - register the hd-audio codec base device
 137  * codec: the device to register
 138  */
 139 int snd_hdac_device_register(struct hdac_device *codec)
 140 {
 141         int err;
 142
 143         err = device_add(&codec->dev);
 144         if (err < 0)
 145                 return err;
 146         mutex_lock(&codec->widget_lock);
 147         err = hda_widget_sysfs_init(codec);
 148         mutex_unlock(&codec->widget_lock);
 149         if (err < 0) {
 150                 device_del(&codec->dev);
 151                 return err;
 152         }
 153
 154         return 0;
 155 }
 156 EXPORT_SYMBOL_GPL(snd_hdac_device_register);
 157
 158 /**
 159  * snd_hdac_device_unregister - unregister the hd-audio codec base device
 160  * codec: the device to unregister
 161  */
 162 void snd_hdac_device_unregister(struct hdac_device *codec)
 163 {
 164         if (device_is_registered(&codec->dev)) {
 165                 mutex_lock(&codec->widget_lock);
 166                 hda_widget_sysfs_exit(codec);
 167                 mutex_unlock(&codec->widget_lock);
 168                 device_del(&codec->dev);
 169                 snd_hdac_bus_remove_device(codec->bus, codec);
 170         }
 171 }
 172 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
 173
 174 /**
 175  * snd_hdac_device_set_chip_name - set/update the codec name
 176  * @codec: the HDAC device
 177  * @name: name string to set
 178  *
 179  * Returns 0 if the name is set or updated, or a negative error code.
 180  */
 181 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
 182 {
 183         char *newname;
 184
 185         if (!name)
 186                 return 0;
 187         newname = kstrdup(name, GFP_KERNEL);
 188         if (!newname)
 189                 return -ENOMEM;
 190         kfree(codec->chip_name);
 191         codec->chip_name = newname;
 192         return 0;
 193 }
 194 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
 195
 196 /**
 197  * snd_hdac_codec_modalias - give the module alias name
 198  * @codec: HDAC device
 199  * @buf: string buffer to store
 200  * @size: string buffer size
 201  *
 202  * Returns the size of string, like snprintf(), or a negative error code.
 203  */
 204 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
 205 {
 206         return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
 207                         codec->vendor_id, codec->revision_id, codec->type);
 208 }
 209 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
 210
 211 /**
 212  * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
 213  *      HD-audio controller
 214  * @codec: the codec object
 215  * @nid: NID to encode
 216  * @verb: verb to encode
 217  * @parm: parameter to encode
 218  *
 219  * Return an encoded command verb or -1 for error.
 220  */
 221 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
 222                                unsigned int verb, unsigned int parm)
 223 {
 224         u32 val, addr;
 225
 226         addr = codec->addr;
 227         if ((addr & ~0xf) || (nid & ~0x7f) ||
 228             (verb & ~0xfff) || (parm & ~0xffff)) {
 229                 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
 230                         addr, nid, verb, parm);
 231                 return -1;
 232         }
 233
 234         val = addr << 28;
 235         val |= (u32)nid << 20;
 236         val |= verb << 8;
 237         val |= parm;
 238         return val;
 239 }
 240 EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
 241
 242 /**
 243  * snd_hdac_exec_verb - execute an encoded verb
 244  * @codec: the codec object
 245  * @cmd: encoded verb to execute
 246  * @flags: optional flags, pass zero for default
 247  * @res: the pointer to store the result, NULL if running async
 248  *
 249  * Returns zero if successful, or a negative error code.
 250  *
 251  * This calls the exec_verb op when set in hdac_codec.  If not,
 252  * call the default snd_hdac_bus_exec_verb().
 253  */
 254 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
 255                        unsigned int flags, unsigned int *res)
 256 {
 257         if (codec->exec_verb)
 258                 return codec->exec_verb(codec, cmd, flags, res);
 259         return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
 260 }
 261 EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
 262
 263
 264 /**
 265  * snd_hdac_read - execute a verb
 266  * @codec: the codec object
 267  * @nid: NID to execute a verb
 268  * @verb: verb to execute
 269  * @parm: parameter for a verb
 270  * @res: the pointer to store the result, NULL if running async
 271  *
 272  * Returns zero if successful, or a negative error code.
 273  */
 274 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
 275                   unsigned int verb, unsigned int parm, unsigned int *res)
 276 {
 277         unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
 278
 279         return snd_hdac_exec_verb(codec, cmd, 0, res);
 280 }
 281 EXPORT_SYMBOL_GPL(snd_hdac_read);
 282
 283 /**
 284  * _snd_hdac_read_parm - read a parmeter
 285  *
 286  * This function returns zero or an error unlike snd_hdac_read_parm().
 287  */
 288 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
 289                         unsigned int *res)
 290 {
 291         unsigned int cmd;
 292
 293         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 294         return snd_hdac_regmap_read_raw(codec, cmd, res);
 295 }
 296 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
 297
 298 /**
 299  * snd_hdac_read_parm_uncached - read a codec parameter without caching
 300  * @codec: the codec object
 301  * @nid: NID to read a parameter
 302  * @parm: parameter to read
 303  *
 304  * Returns -1 for error.  If you need to distinguish the error more
 305  * strictly, use snd_hdac_read() directly.
 306  */
 307 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
 308                                 int parm)
 309 {
 310         unsigned int cmd, val;
 311
 312         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 313         if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
 314                 return -1;
 315         return val;
 316 }
 317 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
 318
 319 /**
 320  * snd_hdac_override_parm - override read-only parameters
 321  * @codec: the codec object
 322  * @nid: NID for the parameter
 323  * @parm: the parameter to change
 324  * @val: the parameter value to overwrite
 325  */
 326 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
 327                            unsigned int parm, unsigned int val)
 328 {
 329         unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
 330         int err;
 331
 332         if (!codec->regmap)
 333                 return -EINVAL;
 334
 335         codec->caps_overwriting = true;
 336         err = snd_hdac_regmap_write_raw(codec, verb, val);
 337         codec->caps_overwriting = false;
 338         return err;
 339 }
 340 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
 341
 342 /**
 343  * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
 344  * @codec: the codec object
 345  * @nid: NID to inspect
 346  * @start_id: the pointer to store the starting NID
 347  *
 348  * Returns the number of subtree nodes or zero if not found.
 349  * This function reads parameters always without caching.
 350  */
 351 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 352                            hda_nid_t *start_id)
 353 {
 354         unsigned int parm;
 355
 356         parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
 357         if (parm == -1) {
 358                 *start_id = 0;
 359                 return 0;
 360         }
 361         *start_id = (parm >> 16) & 0x7fff;
 362         return (int)(parm & 0x7fff);
 363 }
 364 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
 365
 366 /*
 367  * look for an AFG and MFG nodes
 368  */
 369 static void setup_fg_nodes(struct hdac_device *codec)
 370 {
 371         int i, total_nodes, function_id;
 372         hda_nid_t nid;
 373
 374         total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
 375         for (i = 0; i < total_nodes; i++, nid++) {
 376                 function_id = snd_hdac_read_parm(codec, nid,
 377                                                  AC_PAR_FUNCTION_TYPE);
 378                 switch (function_id & 0xff) {
 379                 case AC_GRP_AUDIO_FUNCTION:
 380                         codec->afg = nid;
 381                         codec->afg_function_id = function_id & 0xff;
 382                         codec->afg_unsol = (function_id >> 8) & 1;
 383                         break;
 384                 case AC_GRP_MODEM_FUNCTION:
 385                         codec->mfg = nid;
 386                         codec->mfg_function_id = function_id & 0xff;
 387                         codec->mfg_unsol = (function_id >> 8) & 1;
 388                         break;
 389                 default:
 390                         break;
 391                 }
 392         }
 393 }
 394
 395 /**
 396  * snd_hdac_refresh_widgets - Reset the widget start/end nodes
 397  * @codec: the codec object
 398  * @sysfs: re-initialize sysfs tree, too
 399  */
 400 int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs)
 401 {
 402         hda_nid_t start_nid;
 403         int nums, err;
 404
 405         nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
 406         if (!start_nid || nums <= 0 || nums >= 0xff) {
 407                 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
 408                         codec->afg);
 409                 return -EINVAL;
 410         }
 411
 412         if (sysfs) {
 413                 mutex_lock(&codec->widget_lock);
 414                 err = hda_widget_sysfs_reinit(codec, start_nid, nums);
 415                 mutex_unlock(&codec->widget_lock);
 416                 if (err < 0)
 417                         return err;
 418         }
 419
 420         codec->num_nodes = nums;
 421         codec->start_nid = start_nid;
 422         codec->end_nid = start_nid + nums;
 423         return 0;
 424 }
 425 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
 426
 427 /* return CONNLIST_LEN parameter of the given widget */
 428 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
 429 {
 430         unsigned int wcaps = get_wcaps(codec, nid);
 431         unsigned int parm;
 432
 433         if (!(wcaps & AC_WCAP_CONN_LIST) &&
 434             get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
 435                 return 0;
 436
 437         parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
 438         if (parm == -1)
 439                 parm = 0;
 440         return parm;
 441 }
 442
 443 /**
 444  * snd_hdac_get_connections - get a widget connection list
 445  * @codec: the codec object
 446  * @nid: NID
 447  * @conn_list: the array to store the results, can be NULL
 448  * @max_conns: the max size of the given array
 449  *
 450  * Returns the number of connected widgets, zero for no connection, or a
 451  * negative error code.  When the number of elements don't fit with the
 452  * given array size, it returns -ENOSPC.
 453  *
 454  * When @conn_list is NULL, it just checks the number of connections.
 455  */
 456 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 457                              hda_nid_t *conn_list, int max_conns)
 458 {
 459         unsigned int parm;
 460         int i, conn_len, conns, err;
 461         unsigned int shift, num_elems, mask;
 462         hda_nid_t prev_nid;
 463         int null_count = 0;
 464
 465         parm = get_num_conns(codec, nid);
 466         if (!parm)
 467                 return 0;
 468
 469         if (parm & AC_CLIST_LONG) {
 470                 /* long form */
 471                 shift = 16;
 472                 num_elems = 2;
 473         } else {
 474                 /* short form */
 475                 shift = 8;
 476                 num_elems = 4;
 477         }
 478         conn_len = parm & AC_CLIST_LENGTH;
 479         mask = (1 << (shift-1)) - 1;
 480
 481         if (!conn_len)
 482                 return 0; /* no connection */
 483
 484         if (conn_len == 1) {
 485                 /* single connection */
 486                 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
 487                                     &parm);
 488                 if (err < 0)
 489                         return err;
 490                 if (conn_list)
 491                         conn_list[0] = parm & mask;
 492                 return 1;
 493         }
 494
 495         /* multi connection */
 496         conns = 0;
 497         prev_nid = 0;
 498         for (i = 0; i < conn_len; i++) {
 499                 int range_val;
 500                 hda_nid_t val, n;
 501
 502                 if (i % num_elems == 0) {
 503                         err = snd_hdac_read(codec, nid,
 504                                             AC_VERB_GET_CONNECT_LIST, i,
 505                                             &parm);
 506                         if (err < 0)
 507                                 return -EIO;
 508                 }
 509                 range_val = !!(parm & (1 << (shift-1))); /* ranges */
 510                 val = parm & mask;
 511                 if (val == 0 && null_count++) {  /* no second chance */
 512                         dev_dbg(&codec->dev,
 513                                 "invalid CONNECT_LIST verb %x[%i]:%x\n",
 514                                 nid, i, parm);
 515                         return 0;
 516                 }
 517                 parm >>= shift;
 518                 if (range_val) {
 519                         /* ranges between the previous and this one */
 520                         if (!prev_nid || prev_nid >= val) {
 521                                 dev_warn(&codec->dev,
 522                                          "invalid dep_range_val %x:%x\n",
 523                                          prev_nid, val);
 524                                 continue;
 525                         }
 526                         for (n = prev_nid + 1; n <= val; n++) {
 527                                 if (conn_list) {
 528                                         if (conns >= max_conns)
 529                                                 return -ENOSPC;
 530                                         conn_list[conns] = n;
 531                                 }
 532                                 conns++;
 533                         }
 534                 } else {
 535                         if (conn_list) {
 536                                 if (conns >= max_conns)
 537                                         return -ENOSPC;
 538                                 conn_list[conns] = val;
 539                         }
 540                         conns++;
 541                 }
 542                 prev_nid = val;
 543         }
 544         return conns;
 545 }
 546 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
 547
 548 #ifdef CONFIG_PM
 549 /**
 550  * snd_hdac_power_up - power up the codec
 551  * @codec: the codec object
 552  *
 553  * This function calls the runtime PM helper to power up the given codec.
 554  * Unlike snd_hdac_power_up_pm(), you should call this only for the code
 555  * path that isn't included in PM path.  Otherwise it gets stuck.
 556  *
 557  * Returns zero if successful, or a negative error code.
 558  */
 559 int snd_hdac_power_up(struct hdac_device *codec)
 560 {
 561         return pm_runtime_get_sync(&codec->dev);
 562 }
 563 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
 564
 565 /**
 566  * snd_hdac_power_down - power down the codec
 567  * @codec: the codec object
 568  *
 569  * Returns zero if successful, or a negative error code.
 570  */
 571 int snd_hdac_power_down(struct hdac_device *codec)
 572 {
 573         struct device *dev = &codec->dev;
 574
 575         pm_runtime_mark_last_busy(dev);
 576         return pm_runtime_put_autosuspend(dev);
 577 }
 578 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
 579
 580 /**
 581  * snd_hdac_power_up_pm - power up the codec
 582  * @codec: the codec object
 583  *
 584  * This function can be called in a recursive code path like init code
 585  * which may be called by PM suspend/resume again.  OTOH, if a power-up
 586  * call must wake up the sleeper (e.g. in a kctl callback), use
 587  * snd_hdac_power_up() instead.
 588  *
 589  * Returns zero if successful, or a negative error code.
 590  */
 591 int snd_hdac_power_up_pm(struct hdac_device *codec)
 592 {
 593         if (!atomic_inc_not_zero(&codec->in_pm))
 594                 return snd_hdac_power_up(codec);
 595         return 0;
 596 }
 597 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
 598
 599 /* like snd_hdac_power_up_pm(), but only increment the pm count when
 600  * already powered up.  Returns -1 if not powered up, 1 if incremented
 601  * or 0 if unchanged.  Only used in hdac_regmap.c
 602  */
 603 int snd_hdac_keep_power_up(struct hdac_device *codec)
 604 {
 605         if (!atomic_inc_not_zero(&codec->in_pm)) {
 606                 int ret = pm_runtime_get_if_in_use(&codec->dev);
 607                 if (!ret)
 608                         return -1;
 609                 if (ret < 0)
 610                         return 0;
 611         }
 612         return 1;
 613 }
 614
 615 /**
 616  * snd_hdac_power_down_pm - power down the codec
 617  * @codec: the codec object
 618  *
 619  * Like snd_hdac_power_up_pm(), this function is used in a recursive
 620  * code path like init code which may be called by PM suspend/resume again.
 621  *
 622  * Returns zero if successful, or a negative error code.
 623  */
 624 int snd_hdac_power_down_pm(struct hdac_device *codec)
 625 {
 626         if (atomic_dec_if_positive(&codec->in_pm) < 0)
 627                 return snd_hdac_power_down(codec);
 628         return 0;
 629 }
 630 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
 631 #endif
 632
 633 /* codec vendor labels */
 634 struct hda_vendor_id {
 635         unsigned int id;
 636         const char *name;
 637 };
 638
 639 static struct hda_vendor_id hda_vendor_ids[] = {
 640         { 0x1002, "ATI" },
 641         { 0x1013, "Cirrus Logic" },
 642         { 0x1057, "Motorola" },
 643         { 0x1095, "Silicon Image" },
 644         { 0x10de, "Nvidia" },
 645         { 0x10ec, "Realtek" },
 646         { 0x1102, "Creative" },
 647         { 0x1106, "VIA" },
 648         { 0x111d, "IDT" },
 649         { 0x11c1, "LSI" },
 650         { 0x11d4, "Analog Devices" },
 651         { 0x13f6, "C-Media" },
 652         { 0x14f1, "Conexant" },
 653         { 0x17e8, "Chrontel" },
 654         { 0x1854, "LG" },
 655         { 0x1aec, "Wolfson Microelectronics" },
 656         { 0x1af4, "QEMU" },
 657         { 0x434d, "C-Media" },
 658         { 0x8086, "Intel" },
 659         { 0x8384, "SigmaTel" },
 660         {} /* terminator */
 661 };
 662
 663 /* store the codec vendor name */
 664 static int get_codec_vendor_name(struct hdac_device *codec)
 665 {
 666         const struct hda_vendor_id *c;
 667         u16 vendor_id = codec->vendor_id >> 16;
 668
 669         for (c = hda_vendor_ids; c->id; c++) {
 670                 if (c->id == vendor_id) {
 671                         codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
 672                         return codec->vendor_name ? 0 : -ENOMEM;
 673                 }
 674         }
 675
 676         codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
 677         return codec->vendor_name ? 0 : -ENOMEM;
 678 }
 679
 680 /*
 681  * stream formats
 682  */
 683 struct hda_rate_tbl {
 684         unsigned int hz;
 685         unsigned int alsa_bits;
 686         unsigned int hda_fmt;
 687 };
 688
 689 /* rate = base * mult / div */
 690 #define HDA_RATE(base, mult, div) \
 691         (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
 692          (((div) - 1) << AC_FMT_DIV_SHIFT))
 693
 694 static struct hda_rate_tbl rate_bits[] = {
 695         /* rate in Hz, ALSA rate bitmask, HDA format value */
 696
 697         /* autodetected value used in snd_hda_query_supported_pcm */
 698         { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
 699         { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
 700         { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
 701         { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
 702         { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
 703         { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
 704         { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
 705         { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
 706         { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
 707         { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
 708         { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
 709 #define AC_PAR_PCM_RATE_BITS    11
 710         /* up to bits 10, 384kHZ isn't supported properly */
 711
 712         /* not autodetected value */
 713         { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
 714
 715         { 0 } /* terminator */
 716 };
 717
 718 /**
 719  * snd_hdac_calc_stream_format - calculate the format bitset
 720  * @rate: the sample rate
 721  * @channels: the number of channels
 722  * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 723  * @maxbps: the max. bps
 724  * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
 725  *
 726  * Calculate the format bitset from the given rate, channels and th PCM format.
 727  *
 728  * Return zero if invalid.
 729  */
 730 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 731                                          unsigned int channels,
 732                                          snd_pcm_format_t format,
 733                                          unsigned int maxbps,
 734                                          unsigned short spdif_ctls)
 735 {
 736         int i;
 737         unsigned int val = 0;
 738
 739         for (i = 0; rate_bits[i].hz; i++)
 740                 if (rate_bits[i].hz == rate) {
 741                         val = rate_bits[i].hda_fmt;
 742                         break;
 743                 }
 744         if (!rate_bits[i].hz)
 745                 return 0;
 746
 747         if (channels == 0 || channels > 8)
 748                 return 0;
 749         val |= channels - 1;
 750
 751         switch (snd_pcm_format_width(format)) {
 752         case 8:
 753                 val |= AC_FMT_BITS_8;
 754                 break;
 755         case 16:
 756                 val |= AC_FMT_BITS_16;
 757                 break;
 758         case 20:
 759         case 24:
 760         case 32:
 761                 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
 762                         val |= AC_FMT_BITS_32;
 763                 else if (maxbps >= 24)
 764                         val |= AC_FMT_BITS_24;
 765                 else
 766                         val |= AC_FMT_BITS_20;
 767                 break;
 768         default:
 769                 return 0;
 770         }
 771
 772         if (spdif_ctls & AC_DIG1_NONAUDIO)
 773                 val |= AC_FMT_TYPE_NON_PCM;
 774
 775         return val;
 776 }
 777 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
 778
 779 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
 780 {
 781         unsigned int val = 0;
 782
 783         if (nid != codec->afg &&
 784             (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
 785                 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
 786         if (!val || val == -1)
 787                 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
 788         if (!val || val == -1)
 789                 return 0;
 790         return val;
 791 }
 792
 793 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
 794 {
 795         unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
 796
 797         if (!streams || streams == -1)
 798                 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
 799         if (!streams || streams == -1)
 800                 return 0;
 801         return streams;
 802 }
 803
 804 /**
 805  * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
 806  * @codec: the codec object
 807  * @nid: NID to query
 808  * @ratesp: the pointer to store the detected rate bitflags
 809  * @formatsp: the pointer to store the detected formats
 810  * @bpsp: the pointer to store the detected format widths
 811  *
 812  * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 813  * or @bsps argument is ignored.
 814  *
 815  * Returns 0 if successful, otherwise a negative error code.
 816  */
 817 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 818                                  u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
 819 {
 820         unsigned int i, val, wcaps;
 821
 822         wcaps = get_wcaps(codec, nid);
 823         val = query_pcm_param(codec, nid);
 824
 825         if (ratesp) {
 826                 u32 rates = 0;
 827                 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
 828                         if (val & (1 << i))
 829                                 rates |= rate_bits[i].alsa_bits;
 830                 }
 831                 if (rates == 0) {
 832                         dev_err(&codec->dev,
 833                                 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
 834                                 nid, val,
 835                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
 836                         return -EIO;
 837                 }
 838                 *ratesp = rates;
 839         }
 840
 841         if (formatsp || bpsp) {
 842                 u64 formats = 0;
 843                 unsigned int streams, bps;
 844
 845                 streams = query_stream_param(codec, nid);
 846                 if (!streams)
 847                         return -EIO;
 848
 849                 bps = 0;
 850                 if (streams & AC_SUPFMT_PCM) {
 851                         if (val & AC_SUPPCM_BITS_8) {
 852                                 formats |= SNDRV_PCM_FMTBIT_U8;
 853                                 bps = 8;
 854                         }
 855                         if (val & AC_SUPPCM_BITS_16) {
 856                                 formats |= SNDRV_PCM_FMTBIT_S16_LE;
 857                                 bps = 16;
 858                         }
 859                         if (wcaps & AC_WCAP_DIGITAL) {
 860                                 if (val & AC_SUPPCM_BITS_32)
 861                                         formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
 862                                 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
 863                                         formats |= SNDRV_PCM_FMTBIT_S32_LE;
 864                                 if (val & AC_SUPPCM_BITS_24)
 865                                         bps = 24;
 866                                 else if (val & AC_SUPPCM_BITS_20)
 867                                         bps = 20;
 868                         } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
 869                                           AC_SUPPCM_BITS_32)) {
 870                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
 871                                 if (val & AC_SUPPCM_BITS_32)
 872                                         bps = 32;
 873                                 else if (val & AC_SUPPCM_BITS_24)
 874                                         bps = 24;
 875                                 else if (val & AC_SUPPCM_BITS_20)
 876                                         bps = 20;
 877                         }
 878                 }
 879 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
 880                 if (streams & AC_SUPFMT_FLOAT32) {
 881                         formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 882                         if (!bps)
 883                                 bps = 32;
 884                 }
 885 #endif
 886                 if (streams == AC_SUPFMT_AC3) {
 887                         /* should be exclusive */
 888                         /* temporary hack: we have still no proper support
 889                          * for the direct AC3 stream...
 890                          */
 891                         formats |= SNDRV_PCM_FMTBIT_U8;
 892                         bps = 8;
 893                 }
 894                 if (formats == 0) {
 895                         dev_err(&codec->dev,
 896                                 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
 897                                 nid, val,
 898                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
 899                                 streams);
 900                         return -EIO;
 901                 }
 902                 if (formatsp)
 903                         *formatsp = formats;
 904                 if (bpsp)
 905                         *bpsp = bps;
 906         }
 907
 908         return 0;
 909 }
 910 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
 911
 912 /**
 913  * snd_hdac_is_supported_format - Check the validity of the format
 914  * @codec: the codec object
 915  * @nid: NID to check
 916  * @format: the HD-audio format value to check
 917  *
 918  * Check whether the given node supports the format value.
 919  *
 920  * Returns true if supported, false if not.
 921  */
 922 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 923                                   unsigned int format)
 924 {
 925         int i;
 926         unsigned int val = 0, rate, stream;
 927
 928         val = query_pcm_param(codec, nid);
 929         if (!val)
 930                 return false;
 931
 932         rate = format & 0xff00;
 933         for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
 934                 if (rate_bits[i].hda_fmt == rate) {
 935                         if (val & (1 << i))
 936                                 break;
 937                         return false;
 938                 }
 939         if (i >= AC_PAR_PCM_RATE_BITS)
 940                 return false;
 941
 942         stream = query_stream_param(codec, nid);
 943         if (!stream)
 944                 return false;
 945
 946         if (stream & AC_SUPFMT_PCM) {
 947                 switch (format & 0xf0) {
 948                 case 0x00:
 949                         if (!(val & AC_SUPPCM_BITS_8))
 950                                 return false;
 951                         break;
 952                 case 0x10:
 953                         if (!(val & AC_SUPPCM_BITS_16))
 954                                 return false;
 955                         break;
 956                 case 0x20:
 957                         if (!(val & AC_SUPPCM_BITS_20))
 958                                 return false;
 959                         break;
 960                 case 0x30:
 961                         if (!(val & AC_SUPPCM_BITS_24))
 962                                 return false;
 963                         break;
 964                 case 0x40:
 965                         if (!(val & AC_SUPPCM_BITS_32))
 966                                 return false;
 967                         break;
 968                 default:
 969                         return false;
 970                 }
 971         } else {
 972                 /* FIXME: check for float32 and AC3? */
 973         }
 974
 975         return true;
 976 }
 977 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
 978
 979 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
 980                         int flags, unsigned int verb, unsigned int parm)
 981 {
 982         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
 983         unsigned int res;
 984
 985         if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
 986                 return -1;
 987
 988         return res;
 989 }
 990
 991 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
 992                         int flags, unsigned int verb, unsigned int parm)
 993 {
 994         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
 995
 996         return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
 997 }
 998
 999 /**
1000  * snd_hdac_codec_read - send a command and get the response
1001  * @hdac: the HDAC device
1002  * @nid: NID to send the command
1003  * @flags: optional bit flags
1004  * @verb: the verb to send
1005  * @parm: the parameter for the verb
1006  *
1007  * Send a single command and read the corresponding response.
1008  *
1009  * Returns the obtained response value, or -1 for an error.
1010  */
1011 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1012                         int flags, unsigned int verb, unsigned int parm)
1013 {
1014         return codec_read(hdac, nid, flags, verb, parm);
1015 }
1016 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1017
1018 /**
1019  * snd_hdac_codec_write - send a single command without waiting for response
1020  * @hdac: the HDAC device
1021  * @nid: NID to send the command
1022  * @flags: optional bit flags
1023  * @verb: the verb to send
1024  * @parm: the parameter for the verb
1025  *
1026  * Send a single command without waiting for response.
1027  *
1028  * Returns 0 if successful, or a negative error code.
1029  */
1030 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1031                         int flags, unsigned int verb, unsigned int parm)
1032 {
1033         return codec_write(hdac, nid, flags, verb, parm);
1034 }
1035 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1036
1037 /**
1038  * snd_hdac_check_power_state - check whether the actual power state matches
1039  * with the target state
1040  *
1041  * @hdac: the HDAC device
1042  * @nid: NID to send the command
1043  * @target_state: target state to check for
1044  *
1045  * Return true if state matches, false if not
1046  */
1047 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1048                 hda_nid_t nid, unsigned int target_state)
1049 {
1050         unsigned int state = codec_read(hdac, nid, 0,
1051                                 AC_VERB_GET_POWER_STATE, 0);
1052
1053         if (state & AC_PWRST_ERROR)
1054                 return true;
1055         state = (state >> 4) & 0x0f;
1056         return (state == target_state);
1057 }
1058 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
1059 /**
1060  * snd_hdac_sync_power_state - wait until actual power state matches
1061  * with the target state
1062  *
1063  * @hdac: the HDAC device
1064  * @nid: NID to send the command
1065  * @target_state: target state to check for
1066  *
1067  * Return power state or PS_ERROR if codec rejects GET verb.
1068  */
1069 unsigned int snd_hdac_sync_power_state(struct hdac_device *codec,
1070                         hda_nid_t nid, unsigned int power_state)
1071 {
1072         unsigned long end_time = jiffies + msecs_to_jiffies(500);
1073         unsigned int state, actual_state, count;
1074
1075         for (count = 0; count < 500; count++) {
1076                 state = snd_hdac_codec_read(codec, nid, 0,
1077                                 AC_VERB_GET_POWER_STATE, 0);
1078                 if (state & AC_PWRST_ERROR) {
1079                         msleep(20);
1080                         break;
1081                 }
1082                 actual_state = (state >> 4) & 0x0f;
1083                 if (actual_state == power_state)
1084                         break;
1085                 if (time_after_eq(jiffies, end_time))
1086                         break;
1087                 /* wait until the codec reachs to the target state */
1088                 msleep(1);
1089         }
1090         return state;
1091 }
1092 EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state);