sound/hda/hdac_device.c

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