sound/hda/hdac

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This source file includes following definitions.
default_release
snd_hdac_device_init
snd_hdac_device_exit
snd_hdac_device_register
snd_hdac_device_unregister
snd_hdac_device_set_chip_name
snd_hdac_codec_modalias
snd_hdac_make_cmd
snd_hdac_exec_verb
snd_hdac_read
_snd_hdac_read_parm
snd_hdac_read_parm_uncached
snd_hdac_override_parm
snd_hdac_get_sub_nodes
setup_fg_nodes
snd_hdac_refresh_widgets
get_num_conns
snd_hdac_get_connections
snd_hdac_power_up
snd_hdac_power_down
snd_hdac_power_up_pm
snd_hdac_keep_power_up
snd_hdac_power_down_pm
get_codec_vendor_name
snd_hdac_calc_stream_format
query_pcm_param
query_stream_param
snd_hdac_query_supported_pcm
snd_hdac_is_supported_format
codec_read
codec_write
snd_hdac_codec_read
snd_hdac_codec_write
snd_hdac_check_power_state
snd_hdac_sync_power_state
   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         mutex_init(&codec->regmap_lock);
  61         pm_runtime_set_active(&codec->dev);
  62         pm_runtime_get_noresume(&codec->dev);
  63         atomic_set(&codec->in_pm, 0);
  64 
  65         err = snd_hdac_bus_add_device(bus, codec);
  66         if (err < 0)
  67                 goto error;
  68 
  69         /* fill parameters */
  70         codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  71                                               AC_PAR_VENDOR_ID);
  72         if (codec->vendor_id == -1) {
  73                 /* read again, hopefully the access method was corrected
  74                  * in the last read...
  75                  */
  76                 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  77                                                       AC_PAR_VENDOR_ID);
  78         }
  79 
  80         codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  81                                                  AC_PAR_SUBSYSTEM_ID);
  82         codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
  83                                                 AC_PAR_REV_ID);
  84 
  85         setup_fg_nodes(codec);
  86         if (!codec->afg && !codec->mfg) {
  87                 dev_err(dev, "no AFG or MFG node found\n");
  88                 err = -ENODEV;
  89                 goto error;
  90         }
  91 
  92         fg = codec->afg ? codec->afg : codec->mfg;
  93 
  94         err = snd_hdac_refresh_widgets(codec);
  95         if (err < 0)
  96                 goto error;
  97 
  98         codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
  99         /* reread ssid if not set by parameter */
 100         if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
 101                 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
 102                               &codec->subsystem_id);
 103 
 104         err = get_codec_vendor_name(codec);
 105         if (err < 0)
 106                 goto error;
 107 
 108         codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
 109                                      codec->vendor_id & 0xffff);
 110         if (!codec->chip_name) {
 111                 err = -ENOMEM;
 112                 goto error;
 113         }
 114 
 115         return 0;
 116 
 117  error:
 118         put_device(&codec->dev);
 119         return err;
 120 }
 121 EXPORT_SYMBOL_GPL(snd_hdac_device_init);
 122 
 123 /**
 124  * snd_hdac_device_exit - clean up the HD-audio codec base device
 125  * @codec: device to clean up
 126  */
 127 void snd_hdac_device_exit(struct hdac_device *codec)
 128 {
 129         pm_runtime_put_noidle(&codec->dev);
 130         snd_hdac_bus_remove_device(codec->bus, codec);
 131         kfree(codec->vendor_name);
 132         kfree(codec->chip_name);
 133 }
 134 EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
 135 
 136 /**
 137  * snd_hdac_device_register - register the hd-audio codec base device
 138  * codec: the device to register
 139  */
 140 int snd_hdac_device_register(struct hdac_device *codec)
 141 {
 142         int err;
 143 
 144         err = device_add(&codec->dev);
 145         if (err < 0)
 146                 return err;
 147         mutex_lock(&codec->widget_lock);
 148         err = hda_widget_sysfs_init(codec);
 149         mutex_unlock(&codec->widget_lock);
 150         if (err < 0) {
 151                 device_del(&codec->dev);
 152                 return err;
 153         }
 154 
 155         return 0;
 156 }
 157 EXPORT_SYMBOL_GPL(snd_hdac_device_register);
 158 
 159 /**
 160  * snd_hdac_device_unregister - unregister the hd-audio codec base device
 161  * codec: the device to unregister
 162  */
 163 void snd_hdac_device_unregister(struct hdac_device *codec)
 164 {
 165         if (device_is_registered(&codec->dev)) {
 166                 mutex_lock(&codec->widget_lock);
 167                 hda_widget_sysfs_exit(codec);
 168                 mutex_unlock(&codec->widget_lock);
 169                 device_del(&codec->dev);
 170                 snd_hdac_bus_remove_device(codec->bus, codec);
 171         }
 172 }
 173 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
 174 
 175 /**
 176  * snd_hdac_device_set_chip_name - set/update the codec name
 177  * @codec: the HDAC device
 178  * @name: name string to set
 179  *
 180  * Returns 0 if the name is set or updated, or a negative error code.
 181  */
 182 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
 183 {
 184         char *newname;
 185 
 186         if (!name)
 187                 return 0;
 188         newname = kstrdup(name, GFP_KERNEL);
 189         if (!newname)
 190                 return -ENOMEM;
 191         kfree(codec->chip_name);
 192         codec->chip_name = newname;
 193         return 0;
 194 }
 195 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
 196 
 197 /**
 198  * snd_hdac_codec_modalias - give the module alias name
 199  * @codec: HDAC device
 200  * @buf: string buffer to store
 201  * @size: string buffer size
 202  *
 203  * Returns the size of string, like snprintf(), or a negative error code.
 204  */
 205 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
 206 {
 207         return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
 208                         codec->vendor_id, codec->revision_id, codec->type);
 209 }
 210 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
 211 
 212 /**
 213  * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
 214  *      HD-audio controller
 215  * @codec: the codec object
 216  * @nid: NID to encode
 217  * @verb: verb to encode
 218  * @parm: parameter to encode
 219  *
 220  * Return an encoded command verb or -1 for error.
 221  */
 222 static unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
 223                                       unsigned int verb, unsigned int parm)
 224 {
 225         u32 val, addr;
 226 
 227         addr = codec->addr;
 228         if ((addr & ~0xf) || (nid & ~0x7f) ||
 229             (verb & ~0xfff) || (parm & ~0xffff)) {
 230                 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
 231                         addr, nid, verb, parm);
 232                 return -1;
 233         }
 234 
 235         val = addr << 28;
 236         val |= (u32)nid << 20;
 237         val |= verb << 8;
 238         val |= parm;
 239         return val;
 240 }
 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 
 262 
 263 /**
 264  * snd_hdac_read - execute a verb
 265  * @codec: the codec object
 266  * @nid: NID to execute a verb
 267  * @verb: verb to execute
 268  * @parm: parameter for a verb
 269  * @res: the pointer to store the result, NULL if running async
 270  *
 271  * Returns zero if successful, or a negative error code.
 272  */
 273 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
 274                   unsigned int verb, unsigned int parm, unsigned int *res)
 275 {
 276         unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
 277 
 278         return snd_hdac_exec_verb(codec, cmd, 0, res);
 279 }
 280 EXPORT_SYMBOL_GPL(snd_hdac_read);
 281 
 282 /**
 283  * _snd_hdac_read_parm - read a parmeter
 284  *
 285  * This function returns zero or an error unlike snd_hdac_read_parm().
 286  */
 287 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
 288                         unsigned int *res)
 289 {
 290         unsigned int cmd;
 291 
 292         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 293         return snd_hdac_regmap_read_raw(codec, cmd, res);
 294 }
 295 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
 296 
 297 /**
 298  * snd_hdac_read_parm_uncached - read a codec parameter without caching
 299  * @codec: the codec object
 300  * @nid: NID to read a parameter
 301  * @parm: parameter to read
 302  *
 303  * Returns -1 for error.  If you need to distinguish the error more
 304  * strictly, use snd_hdac_read() directly.
 305  */
 306 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
 307                                 int parm)
 308 {
 309         unsigned int cmd, val;
 310 
 311         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
 312         if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
 313                 return -1;
 314         return val;
 315 }
 316 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
 317 
 318 /**
 319  * snd_hdac_override_parm - override read-only parameters
 320  * @codec: the codec object
 321  * @nid: NID for the parameter
 322  * @parm: the parameter to change
 323  * @val: the parameter value to overwrite
 324  */
 325 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
 326                            unsigned int parm, unsigned int val)
 327 {
 328         unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
 329         int err;
 330 
 331         if (!codec->regmap)
 332                 return -EINVAL;
 333 
 334         codec->caps_overwriting = true;
 335         err = snd_hdac_regmap_write_raw(codec, verb, val);
 336         codec->caps_overwriting = false;
 337         return err;
 338 }
 339 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
 340 
 341 /**
 342  * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
 343  * @codec: the codec object
 344  * @nid: NID to inspect
 345  * @start_id: the pointer to store the starting NID
 346  *
 347  * Returns the number of subtree nodes or zero if not found.
 348  * This function reads parameters always without caching.
 349  */
 350 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 351                            hda_nid_t *start_id)
 352 {
 353         unsigned int parm;
 354 
 355         parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
 356         if (parm == -1) {
 357                 *start_id = 0;
 358                 return 0;
 359         }
 360         *start_id = (parm >> 16) & 0x7fff;
 361         return (int)(parm & 0x7fff);
 362 }
 363 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
 364 
 365 /*
 366  * look for an AFG and MFG nodes
 367  */
 368 static void setup_fg_nodes(struct hdac_device *codec)
 369 {
 370         int i, total_nodes, function_id;
 371         hda_nid_t nid;
 372 
 373         total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
 374         for (i = 0; i < total_nodes; i++, nid++) {
 375                 function_id = snd_hdac_read_parm(codec, nid,
 376                                                  AC_PAR_FUNCTION_TYPE);
 377                 switch (function_id & 0xff) {
 378                 case AC_GRP_AUDIO_FUNCTION:
 379                         codec->afg = nid;
 380                         codec->afg_function_id = function_id & 0xff;
 381                         codec->afg_unsol = (function_id >> 8) & 1;
 382                         break;
 383                 case AC_GRP_MODEM_FUNCTION:
 384                         codec->mfg = nid;
 385                         codec->mfg_function_id = function_id & 0xff;
 386                         codec->mfg_unsol = (function_id >> 8) & 1;
 387                         break;
 388                 default:
 389                         break;
 390                 }
 391         }
 392 }
 393 
 394 /**
 395  * snd_hdac_refresh_widgets - Reset the widget start/end nodes
 396  * @codec: the codec object
 397  */
 398 int snd_hdac_refresh_widgets(struct hdac_device *codec)
 399 {
 400         hda_nid_t start_nid;
 401         int nums, err = 0;
 402 
 403         /*
 404          * Serialize against multiple threads trying to update the sysfs
 405          * widgets array.
 406          */
 407         mutex_lock(&codec->widget_lock);
 408         nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
 409         if (!start_nid || nums <= 0 || nums >= 0xff) {
 410                 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
 411                         codec->afg);
 412                 err = -EINVAL;
 413                 goto unlock;
 414         }
 415 
 416         err = hda_widget_sysfs_reinit(codec, start_nid, nums);
 417         if (err < 0)
 418                 goto unlock;
 419 
 420         codec->num_nodes = nums;
 421         codec->start_nid = start_nid;
 422         codec->end_nid = start_nid + nums;
 423 unlock:
 424         mutex_unlock(&codec->widget_lock);
 425         return err;
 426 }
 427 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
 428 
 429 /* return CONNLIST_LEN parameter of the given widget */
 430 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
 431 {
 432         unsigned int wcaps = get_wcaps(codec, nid);
 433         unsigned int parm;
 434 
 435         if (!(wcaps & AC_WCAP_CONN_LIST) &&
 436             get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
 437                 return 0;
 438 
 439         parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
 440         if (parm == -1)
 441                 parm = 0;
 442         return parm;
 443 }
 444 
 445 /**
 446  * snd_hdac_get_connections - get a widget connection list
 447  * @codec: the codec object
 448  * @nid: NID
 449  * @conn_list: the array to store the results, can be NULL
 450  * @max_conns: the max size of the given array
 451  *
 452  * Returns the number of connected widgets, zero for no connection, or a
 453  * negative error code.  When the number of elements don't fit with the
 454  * given array size, it returns -ENOSPC.
 455  *
 456  * When @conn_list is NULL, it just checks the number of connections.
 457  */
 458 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 459                              hda_nid_t *conn_list, int max_conns)
 460 {
 461         unsigned int parm;
 462         int i, conn_len, conns, err;
 463         unsigned int shift, num_elems, mask;
 464         hda_nid_t prev_nid;
 465         int null_count = 0;
 466 
 467         parm = get_num_conns(codec, nid);
 468         if (!parm)
 469                 return 0;
 470 
 471         if (parm & AC_CLIST_LONG) {
 472                 /* long form */
 473                 shift = 16;
 474                 num_elems = 2;
 475         } else {
 476                 /* short form */
 477                 shift = 8;
 478                 num_elems = 4;
 479         }
 480         conn_len = parm & AC_CLIST_LENGTH;
 481         mask = (1 << (shift-1)) - 1;
 482 
 483         if (!conn_len)
 484                 return 0; /* no connection */
 485 
 486         if (conn_len == 1) {
 487                 /* single connection */
 488                 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
 489                                     &parm);
 490                 if (err < 0)
 491                         return err;
 492                 if (conn_list)
 493                         conn_list[0] = parm & mask;
 494                 return 1;
 495         }
 496 
 497         /* multi connection */
 498         conns = 0;
 499         prev_nid = 0;
 500         for (i = 0; i < conn_len; i++) {
 501                 int range_val;
 502                 hda_nid_t val, n;
 503 
 504                 if (i % num_elems == 0) {
 505                         err = snd_hdac_read(codec, nid,
 506                                             AC_VERB_GET_CONNECT_LIST, i,
 507                                             &parm);
 508                         if (err < 0)
 509                                 return -EIO;
 510                 }
 511                 range_val = !!(parm & (1 << (shift-1))); /* ranges */
 512                 val = parm & mask;
 513                 if (val == 0 && null_count++) {  /* no second chance */
 514                         dev_dbg(&codec->dev,
 515                                 "invalid CONNECT_LIST verb %x[%i]:%x\n",
 516                                 nid, i, parm);
 517                         return 0;
 518                 }
 519                 parm >>= shift;
 520                 if (range_val) {
 521                         /* ranges between the previous and this one */
 522                         if (!prev_nid || prev_nid >= val) {
 523                                 dev_warn(&codec->dev,
 524                                          "invalid dep_range_val %x:%x\n",
 525                                          prev_nid, val);
 526                                 continue;
 527                         }
 528                         for (n = prev_nid + 1; n <= val; n++) {
 529                                 if (conn_list) {
 530                                         if (conns >= max_conns)
 531                                                 return -ENOSPC;
 532                                         conn_list[conns] = n;
 533                                 }
 534                                 conns++;
 535                         }
 536                 } else {
 537                         if (conn_list) {
 538                                 if (conns >= max_conns)
 539                                         return -ENOSPC;
 540                                 conn_list[conns] = val;
 541                         }
 542                         conns++;
 543                 }
 544                 prev_nid = val;
 545         }
 546         return conns;
 547 }
 548 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
 549 
 550 #ifdef CONFIG_PM
 551 /**
 552  * snd_hdac_power_up - power up the codec
 553  * @codec: the codec object
 554  *
 555  * This function calls the runtime PM helper to power up the given codec.
 556  * Unlike snd_hdac_power_up_pm(), you should call this only for the code
 557  * path that isn't included in PM path.  Otherwise it gets stuck.
 558  *
 559  * Returns zero if successful, or a negative error code.
 560  */
 561 int snd_hdac_power_up(struct hdac_device *codec)
 562 {
 563         return pm_runtime_get_sync(&codec->dev);
 564 }
 565 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
 566 
 567 /**
 568  * snd_hdac_power_down - power down the codec
 569  * @codec: the codec object
 570  *
 571  * Returns zero if successful, or a negative error code.
 572  */
 573 int snd_hdac_power_down(struct hdac_device *codec)
 574 {
 575         struct device *dev = &codec->dev;
 576 
 577         pm_runtime_mark_last_busy(dev);
 578         return pm_runtime_put_autosuspend(dev);
 579 }
 580 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
 581 
 582 /**
 583  * snd_hdac_power_up_pm - power up the codec
 584  * @codec: the codec object
 585  *
 586  * This function can be called in a recursive code path like init code
 587  * which may be called by PM suspend/resume again.  OTOH, if a power-up
 588  * call must wake up the sleeper (e.g. in a kctl callback), use
 589  * snd_hdac_power_up() instead.
 590  *
 591  * Returns zero if successful, or a negative error code.
 592  */
 593 int snd_hdac_power_up_pm(struct hdac_device *codec)
 594 {
 595         if (!atomic_inc_not_zero(&codec->in_pm))
 596                 return snd_hdac_power_up(codec);
 597         return 0;
 598 }
 599 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
 600 
 601 /* like snd_hdac_power_up_pm(), but only increment the pm count when
 602  * already powered up.  Returns -1 if not powered up, 1 if incremented
 603  * or 0 if unchanged.  Only used in hdac_regmap.c
 604  */
 605 int snd_hdac_keep_power_up(struct hdac_device *codec)
 606 {
 607         if (!atomic_inc_not_zero(&codec->in_pm)) {
 608                 int ret = pm_runtime_get_if_in_use(&codec->dev);
 609                 if (!ret)
 610                         return -1;
 611                 if (ret < 0)
 612                         return 0;
 613         }
 614         return 1;
 615 }
 616 
 617 /**
 618  * snd_hdac_power_down_pm - power down the codec
 619  * @codec: the codec object
 620  *
 621  * Like snd_hdac_power_up_pm(), this function is used in a recursive
 622  * code path like init code which may be called by PM suspend/resume again.
 623  *
 624  * Returns zero if successful, or a negative error code.
 625  */
 626 int snd_hdac_power_down_pm(struct hdac_device *codec)
 627 {
 628         if (atomic_dec_if_positive(&codec->in_pm) < 0)
 629                 return snd_hdac_power_down(codec);
 630         return 0;
 631 }
 632 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
 633 #endif
 634 
 635 /* codec vendor labels */
 636 struct hda_vendor_id {
 637         unsigned int id;
 638         const char *name;
 639 };
 640 
 641 static struct hda_vendor_id hda_vendor_ids[] = {
 642         { 0x1002, "ATI" },
 643         { 0x1013, "Cirrus Logic" },
 644         { 0x1057, "Motorola" },
 645         { 0x1095, "Silicon Image" },
 646         { 0x10de, "Nvidia" },
 647         { 0x10ec, "Realtek" },
 648         { 0x1102, "Creative" },
 649         { 0x1106, "VIA" },
 650         { 0x111d, "IDT" },
 651         { 0x11c1, "LSI" },
 652         { 0x11d4, "Analog Devices" },
 653         { 0x13f6, "C-Media" },
 654         { 0x14f1, "Conexant" },
 655         { 0x17e8, "Chrontel" },
 656         { 0x1854, "LG" },
 657         { 0x1aec, "Wolfson Microelectronics" },
 658         { 0x1af4, "QEMU" },
 659         { 0x434d, "C-Media" },
 660         { 0x8086, "Intel" },
 661         { 0x8384, "SigmaTel" },
 662         {} /* terminator */
 663 };
 664 
 665 /* store the codec vendor name */
 666 static int get_codec_vendor_name(struct hdac_device *codec)
 667 {
 668         const struct hda_vendor_id *c;
 669         u16 vendor_id = codec->vendor_id >> 16;
 670 
 671         for (c = hda_vendor_ids; c->id; c++) {
 672                 if (c->id == vendor_id) {
 673                         codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
 674                         return codec->vendor_name ? 0 : -ENOMEM;
 675                 }
 676         }
 677 
 678         codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
 679         return codec->vendor_name ? 0 : -ENOMEM;
 680 }
 681 
 682 /*
 683  * stream formats
 684  */
 685 struct hda_rate_tbl {
 686         unsigned int hz;
 687         unsigned int alsa_bits;
 688         unsigned int hda_fmt;
 689 };
 690 
 691 /* rate = base * mult / div */
 692 #define HDA_RATE(base, mult, div) \
 693         (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
 694          (((div) - 1) << AC_FMT_DIV_SHIFT))
 695 
 696 static struct hda_rate_tbl rate_bits[] = {
 697         /* rate in Hz, ALSA rate bitmask, HDA format value */
 698 
 699         /* autodetected value used in snd_hda_query_supported_pcm */
 700         { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
 701         { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
 702         { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
 703         { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
 704         { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
 705         { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
 706         { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
 707         { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
 708         { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
 709         { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
 710         { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
 711 #define AC_PAR_PCM_RATE_BITS    11
 712         /* up to bits 10, 384kHZ isn't supported properly */
 713 
 714         /* not autodetected value */
 715         { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
 716 
 717         { 0 } /* terminator */
 718 };
 719 
 720 /**
 721  * snd_hdac_calc_stream_format - calculate the format bitset
 722  * @rate: the sample rate
 723  * @channels: the number of channels
 724  * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
 725  * @maxbps: the max. bps
 726  * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
 727  *
 728  * Calculate the format bitset from the given rate, channels and th PCM format.
 729  *
 730  * Return zero if invalid.
 731  */
 732 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 733                                          unsigned int channels,
 734                                          snd_pcm_format_t format,
 735                                          unsigned int maxbps,
 736                                          unsigned short spdif_ctls)
 737 {
 738         int i;
 739         unsigned int val = 0;
 740 
 741         for (i = 0; rate_bits[i].hz; i++)
 742                 if (rate_bits[i].hz == rate) {
 743                         val = rate_bits[i].hda_fmt;
 744                         break;
 745                 }
 746         if (!rate_bits[i].hz)
 747                 return 0;
 748 
 749         if (channels == 0 || channels > 8)
 750                 return 0;
 751         val |= channels - 1;
 752 
 753         switch (snd_pcm_format_width(format)) {
 754         case 8:
 755                 val |= AC_FMT_BITS_8;
 756                 break;
 757         case 16:
 758                 val |= AC_FMT_BITS_16;
 759                 break;
 760         case 20:
 761         case 24:
 762         case 32:
 763                 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
 764                         val |= AC_FMT_BITS_32;
 765                 else if (maxbps >= 24)
 766                         val |= AC_FMT_BITS_24;
 767                 else
 768                         val |= AC_FMT_BITS_20;
 769                 break;
 770         default:
 771                 return 0;
 772         }
 773 
 774         if (spdif_ctls & AC_DIG1_NONAUDIO)
 775                 val |= AC_FMT_TYPE_NON_PCM;
 776 
 777         return val;
 778 }
 779 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
 780 
 781 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
 782 {
 783         unsigned int val = 0;
 784 
 785         if (nid != codec->afg &&
 786             (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
 787                 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
 788         if (!val || val == -1)
 789                 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
 790         if (!val || val == -1)
 791                 return 0;
 792         return val;
 793 }
 794 
 795 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
 796 {
 797         unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
 798 
 799         if (!streams || streams == -1)
 800                 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
 801         if (!streams || streams == -1)
 802                 return 0;
 803         return streams;
 804 }
 805 
 806 /**
 807  * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
 808  * @codec: the codec object
 809  * @nid: NID to query
 810  * @ratesp: the pointer to store the detected rate bitflags
 811  * @formatsp: the pointer to store the detected formats
 812  * @bpsp: the pointer to store the detected format widths
 813  *
 814  * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
 815  * or @bsps argument is ignored.
 816  *
 817  * Returns 0 if successful, otherwise a negative error code.
 818  */
 819 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 820                                  u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
 821 {
 822         unsigned int i, val, wcaps;
 823 
 824         wcaps = get_wcaps(codec, nid);
 825         val = query_pcm_param(codec, nid);
 826 
 827         if (ratesp) {
 828                 u32 rates = 0;
 829                 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
 830                         if (val & (1 << i))
 831                                 rates |= rate_bits[i].alsa_bits;
 832                 }
 833                 if (rates == 0) {
 834                         dev_err(&codec->dev,
 835                                 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
 836                                 nid, val,
 837                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
 838                         return -EIO;
 839                 }
 840                 *ratesp = rates;
 841         }
 842 
 843         if (formatsp || bpsp) {
 844                 u64 formats = 0;
 845                 unsigned int streams, bps;
 846 
 847                 streams = query_stream_param(codec, nid);
 848                 if (!streams)
 849                         return -EIO;
 850 
 851                 bps = 0;
 852                 if (streams & AC_SUPFMT_PCM) {
 853                         if (val & AC_SUPPCM_BITS_8) {
 854                                 formats |= SNDRV_PCM_FMTBIT_U8;
 855                                 bps = 8;
 856                         }
 857                         if (val & AC_SUPPCM_BITS_16) {
 858                                 formats |= SNDRV_PCM_FMTBIT_S16_LE;
 859                                 bps = 16;
 860                         }
 861                         if (wcaps & AC_WCAP_DIGITAL) {
 862                                 if (val & AC_SUPPCM_BITS_32)
 863                                         formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
 864                                 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
 865                                         formats |= SNDRV_PCM_FMTBIT_S32_LE;
 866                                 if (val & AC_SUPPCM_BITS_24)
 867                                         bps = 24;
 868                                 else if (val & AC_SUPPCM_BITS_20)
 869                                         bps = 20;
 870                         } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
 871                                           AC_SUPPCM_BITS_32)) {
 872                                 formats |= SNDRV_PCM_FMTBIT_S32_LE;
 873                                 if (val & AC_SUPPCM_BITS_32)
 874                                         bps = 32;
 875                                 else if (val & AC_SUPPCM_BITS_24)
 876                                         bps = 24;
 877                                 else if (val & AC_SUPPCM_BITS_20)
 878                                         bps = 20;
 879                         }
 880                 }
 881 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
 882                 if (streams & AC_SUPFMT_FLOAT32) {
 883                         formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 884                         if (!bps)
 885                                 bps = 32;
 886                 }
 887 #endif
 888                 if (streams == AC_SUPFMT_AC3) {
 889                         /* should be exclusive */
 890                         /* temporary hack: we have still no proper support
 891                          * for the direct AC3 stream...
 892                          */
 893                         formats |= SNDRV_PCM_FMTBIT_U8;
 894                         bps = 8;
 895                 }
 896                 if (formats == 0) {
 897                         dev_err(&codec->dev,
 898                                 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
 899                                 nid, val,
 900                                 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
 901                                 streams);
 902                         return -EIO;
 903                 }
 904                 if (formatsp)
 905                         *formatsp = formats;
 906                 if (bpsp)
 907                         *bpsp = bps;
 908         }
 909 
 910         return 0;
 911 }
 912 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
 913 
 914 /**
 915  * snd_hdac_is_supported_format - Check the validity of the format
 916  * @codec: the codec object
 917  * @nid: NID to check
 918  * @format: the HD-audio format value to check
 919  *
 920  * Check whether the given node supports the format value.
 921  *
 922  * Returns true if supported, false if not.
 923  */
 924 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 925                                   unsigned int format)
 926 {
 927         int i;
 928         unsigned int val = 0, rate, stream;
 929 
 930         val = query_pcm_param(codec, nid);
 931         if (!val)
 932                 return false;
 933 
 934         rate = format & 0xff00;
 935         for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
 936                 if (rate_bits[i].hda_fmt == rate) {
 937                         if (val & (1 << i))
 938                                 break;
 939                         return false;
 940                 }
 941         if (i >= AC_PAR_PCM_RATE_BITS)
 942                 return false;
 943 
 944         stream = query_stream_param(codec, nid);
 945         if (!stream)
 946                 return false;
 947 
 948         if (stream & AC_SUPFMT_PCM) {
 949                 switch (format & 0xf0) {
 950                 case 0x00:
 951                         if (!(val & AC_SUPPCM_BITS_8))
 952                                 return false;
 953                         break;
 954                 case 0x10:
 955                         if (!(val & AC_SUPPCM_BITS_16))
 956                                 return false;
 957                         break;
 958                 case 0x20:
 959                         if (!(val & AC_SUPPCM_BITS_20))
 960                                 return false;
 961                         break;
 962                 case 0x30:
 963                         if (!(val & AC_SUPPCM_BITS_24))
 964                                 return false;
 965                         break;
 966                 case 0x40:
 967                         if (!(val & AC_SUPPCM_BITS_32))
 968                                 return false;
 969                         break;
 970                 default:
 971                         return false;
 972                 }
 973         } else {
 974                 /* FIXME: check for float32 and AC3? */
 975         }
 976 
 977         return true;
 978 }
 979 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
 980 
 981 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
 982                         int flags, unsigned int verb, unsigned int parm)
 983 {
 984         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
 985         unsigned int res;
 986 
 987         if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
 988                 return -1;
 989 
 990         return res;
 991 }
 992 
 993 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
 994                         int flags, unsigned int verb, unsigned int parm)
 995 {
 996         unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
 997 
 998         return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
 999 }
1000 
1001 /**
1002  * snd_hdac_codec_read - send a command and get the response
1003  * @hdac: the HDAC device
1004  * @nid: NID to send the command
1005  * @flags: optional bit flags
1006  * @verb: the verb to send
1007  * @parm: the parameter for the verb
1008  *
1009  * Send a single command and read the corresponding response.
1010  *
1011  * Returns the obtained response value, or -1 for an error.
1012  */
1013 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1014                         int flags, unsigned int verb, unsigned int parm)
1015 {
1016         return codec_read(hdac, nid, flags, verb, parm);
1017 }
1018 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1019 
1020 /**
1021  * snd_hdac_codec_write - send a single command without waiting for response
1022  * @hdac: the HDAC device
1023  * @nid: NID to send the command
1024  * @flags: optional bit flags
1025  * @verb: the verb to send
1026  * @parm: the parameter for the verb
1027  *
1028  * Send a single command without waiting for response.
1029  *
1030  * Returns 0 if successful, or a negative error code.
1031  */
1032 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1033                         int flags, unsigned int verb, unsigned int parm)
1034 {
1035         return codec_write(hdac, nid, flags, verb, parm);
1036 }
1037 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1038 
1039 /**
1040  * snd_hdac_check_power_state - check whether the actual power state matches
1041  * with the target state
1042  *
1043  * @hdac: the HDAC device
1044  * @nid: NID to send the command
1045  * @target_state: target state to check for
1046  *
1047  * Return true if state matches, false if not
1048  */
1049 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1050                 hda_nid_t nid, unsigned int target_state)
1051 {
1052         unsigned int state = codec_read(hdac, nid, 0,
1053                                 AC_VERB_GET_POWER_STATE, 0);
1054 
1055         if (state & AC_PWRST_ERROR)
1056                 return true;
1057         state = (state >> 4) & 0x0f;
1058         return (state == target_state);
1059 }
1060 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
1061 /**
1062  * snd_hdac_sync_power_state - wait until actual power state matches
1063  * with the target state
1064  *
1065  * @hdac: the HDAC device
1066  * @nid: NID to send the command
1067  * @target_state: target state to check for
1068  *
1069  * Return power state or PS_ERROR if codec rejects GET verb.
1070  */
1071 unsigned int snd_hdac_sync_power_state(struct hdac_device *codec,
1072                         hda_nid_t nid, unsigned int power_state)
1073 {
1074         unsigned long end_time = jiffies + msecs_to_jiffies(500);
1075         unsigned int state, actual_state, count;
1076 
1077         for (count = 0; count < 500; count++) {
1078                 state = snd_hdac_codec_read(codec, nid, 0,
1079                                 AC_VERB_GET_POWER_STATE, 0);
1080                 if (state & AC_PWRST_ERROR) {
1081                         msleep(20);
1082                         break;
1083                 }
1084                 actual_state = (state >> 4) & 0x0f;
1085                 if (actual_state == power_state)
1086                         break;
1087                 if (time_after_eq(jiffies, end_time))
1088                         break;
1089                 /* wait until the codec reachs to the target state */
1090                 msleep(1);
1091         }
1092         return state;
1093 }
1094 EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state);
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root/sound/hda/hdac_device.c

DEFINITIONS
