1 /* 2 * HD-audio codec core device 3 */ 4 5 #include <linux/init.h> 6 #include <linux/delay.h> 7 #include <linux/device.h> 8 #include <linux/slab.h> 9 #include <linux/module.h> 10 #include <linux/export.h> 11 #include <linux/pm_runtime.h> 12 #include <sound/hdaudio.h> 13 #include <sound/hda_regmap.h> 14 #include <sound/pcm.h> 15 #include "local.h" 16 17 static void setup_fg_nodes(struct hdac_device *codec); 18 static int get_codec_vendor_name(struct hdac_device *codec); 19 20 static void default_release(struct device *dev) 21 { 22 snd_hdac_device_exit(container_of(dev, struct hdac_device, dev)); 23 } 24 25 /** 26 * snd_hdac_device_init - initialize the HD-audio codec base device 27 * @codec: device to initialize 28 * @bus: but to attach 29 * @name: device name string 30 * @addr: codec address 31 * 32 * Returns zero for success or a negative error code. 33 * 34 * This function increments the runtime PM counter and marks it active. 35 * The caller needs to turn it off appropriately later. 36 * 37 * The caller needs to set the device's release op properly by itself. 38 */ 39 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus, 40 const char *name, unsigned int addr) 41 { 42 struct device *dev; 43 hda_nid_t fg; 44 int err; 45 46 dev = &codec->dev; 47 device_initialize(dev); 48 dev->parent = bus->dev; 49 dev->bus = &snd_hda_bus_type; 50 dev->release = default_release; 51 dev->groups = hdac_dev_attr_groups; 52 dev_set_name(dev, "%s", name); 53 device_enable_async_suspend(dev); 54 55 codec->bus = bus; 56 codec->addr = addr; 57 codec->type = HDA_DEV_CORE; 58 pm_runtime_set_active(&codec->dev); 59 pm_runtime_get_noresume(&codec->dev); 60 atomic_set(&codec->in_pm, 0); 61 62 err = snd_hdac_bus_add_device(bus, codec); 63 if (err < 0) 64 goto error; 65 66 /* fill parameters */ 67 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 68 AC_PAR_VENDOR_ID); 69 if (codec->vendor_id == -1) { 70 /* read again, hopefully the access method was corrected 71 * in the last read... 72 */ 73 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 74 AC_PAR_VENDOR_ID); 75 } 76 77 codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 78 AC_PAR_SUBSYSTEM_ID); 79 codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 80 AC_PAR_REV_ID); 81 82 setup_fg_nodes(codec); 83 if (!codec->afg && !codec->mfg) { 84 dev_err(dev, "no AFG or MFG node found\n"); 85 err = -ENODEV; 86 goto error; 87 } 88 89 fg = codec->afg ? codec->afg : codec->mfg; 90 91 err = snd_hdac_refresh_widgets(codec, false); 92 if (err < 0) 93 goto error; 94 95 codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE); 96 /* reread ssid if not set by parameter */ 97 if (codec->subsystem_id == -1 || codec->subsystem_id == 0) 98 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0, 99 &codec->subsystem_id); 100 101 err = get_codec_vendor_name(codec); 102 if (err < 0) 103 goto error; 104 105 codec->chip_name = kasprintf(GFP_KERNEL, "ID %x", 106 codec->vendor_id & 0xffff); 107 if (!codec->chip_name) { 108 err = -ENOMEM; 109 goto error; 110 } 111 112 return 0; 113 114 error: 115 put_device(&codec->dev); 116 return err; 117 } 118 EXPORT_SYMBOL_GPL(snd_hdac_device_init); 119 120 /** 121 * snd_hdac_device_exit - clean up the HD-audio codec base device 122 * @codec: device to clean up 123 */ 124 void snd_hdac_device_exit(struct hdac_device *codec) 125 { 126 pm_runtime_put_noidle(&codec->dev); 127 snd_hdac_bus_remove_device(codec->bus, codec); 128 kfree(codec->vendor_name); 129 kfree(codec->chip_name); 130 } 131 EXPORT_SYMBOL_GPL(snd_hdac_device_exit); 132 133 /** 134 * snd_hdac_device_register - register the hd-audio codec base device 135 * codec: the device to register 136 */ 137 int snd_hdac_device_register(struct hdac_device *codec) 138 { 139 int err; 140 141 err = device_add(&codec->dev); 142 if (err < 0) 143 return err; 144 err = hda_widget_sysfs_init(codec); 145 if (err < 0) { 146 device_del(&codec->dev); 147 return err; 148 } 149 150 return 0; 151 } 152 EXPORT_SYMBOL_GPL(snd_hdac_device_register); 153 154 /** 155 * snd_hdac_device_unregister - unregister the hd-audio codec base device 156 * codec: the device to unregister 157 */ 158 void snd_hdac_device_unregister(struct hdac_device *codec) 159 { 160 if (device_is_registered(&codec->dev)) { 161 hda_widget_sysfs_exit(codec); 162 device_del(&codec->dev); 163 snd_hdac_bus_remove_device(codec->bus, codec); 164 } 165 } 166 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister); 167 168 /** 169 * snd_hdac_device_set_chip_name - set/update the codec name 170 * @codec: the HDAC device 171 * @name: name string to set 172 * 173 * Returns 0 if the name is set or updated, or a negative error code. 174 */ 175 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name) 176 { 177 char *newname; 178 179 if (!name) 180 return 0; 181 newname = kstrdup(name, GFP_KERNEL); 182 if (!newname) 183 return -ENOMEM; 184 kfree(codec->chip_name); 185 codec->chip_name = newname; 186 return 0; 187 } 188 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name); 189 190 /** 191 * snd_hdac_codec_modalias - give the module alias name 192 * @codec: HDAC device 193 * @buf: string buffer to store 194 * @size: string buffer size 195 * 196 * Returns the size of string, like snprintf(), or a negative error code. 197 */ 198 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size) 199 { 200 return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n", 201 codec->vendor_id, codec->revision_id, codec->type); 202 } 203 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias); 204 205 /** 206 * snd_hdac_make_cmd - compose a 32bit command word to be sent to the 207 * HD-audio controller 208 * @codec: the codec object 209 * @nid: NID to encode 210 * @verb: verb to encode 211 * @parm: parameter to encode 212 * 213 * Return an encoded command verb or -1 for error. 214 */ 215 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid, 216 unsigned int verb, unsigned int parm) 217 { 218 u32 val, addr; 219 220 addr = codec->addr; 221 if ((addr & ~0xf) || (nid & ~0x7f) || 222 (verb & ~0xfff) || (parm & ~0xffff)) { 223 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n", 224 addr, nid, verb, parm); 225 return -1; 226 } 227 228 val = addr << 28; 229 val |= (u32)nid << 20; 230 val |= verb << 8; 231 val |= parm; 232 return val; 233 } 234 EXPORT_SYMBOL_GPL(snd_hdac_make_cmd); 235 236 /** 237 * snd_hdac_exec_verb - execute an encoded verb 238 * @codec: the codec object 239 * @cmd: encoded verb to execute 240 * @flags: optional flags, pass zero for default 241 * @res: the pointer to store the result, NULL if running async 242 * 243 * Returns zero if successful, or a negative error code. 244 * 245 * This calls the exec_verb op when set in hdac_codec. If not, 246 * call the default snd_hdac_bus_exec_verb(). 247 */ 248 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd, 249 unsigned int flags, unsigned int *res) 250 { 251 if (codec->exec_verb) 252 return codec->exec_verb(codec, cmd, flags, res); 253 return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res); 254 } 255 EXPORT_SYMBOL_GPL(snd_hdac_exec_verb); 256 257 258 /** 259 * snd_hdac_read - execute a verb 260 * @codec: the codec object 261 * @nid: NID to execute a verb 262 * @verb: verb to execute 263 * @parm: parameter for a verb 264 * @res: the pointer to store the result, NULL if running async 265 * 266 * Returns zero if successful, or a negative error code. 267 */ 268 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid, 269 unsigned int verb, unsigned int parm, unsigned int *res) 270 { 271 unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm); 272 273 return snd_hdac_exec_verb(codec, cmd, 0, res); 274 } 275 EXPORT_SYMBOL_GPL(snd_hdac_read); 276 277 /** 278 * _snd_hdac_read_parm - read a parmeter 279 * 280 * This function returns zero or an error unlike snd_hdac_read_parm(). 281 */ 282 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm, 283 unsigned int *res) 284 { 285 unsigned int cmd; 286 287 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; 288 return snd_hdac_regmap_read_raw(codec, cmd, res); 289 } 290 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm); 291 292 /** 293 * snd_hdac_read_parm_uncached - read a codec parameter without caching 294 * @codec: the codec object 295 * @nid: NID to read a parameter 296 * @parm: parameter to read 297 * 298 * Returns -1 for error. If you need to distinguish the error more 299 * strictly, use snd_hdac_read() directly. 300 */ 301 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid, 302 int parm) 303 { 304 unsigned int cmd, val; 305 306 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; 307 if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0) 308 return -1; 309 return val; 310 } 311 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached); 312 313 /** 314 * snd_hdac_override_parm - override read-only parameters 315 * @codec: the codec object 316 * @nid: NID for the parameter 317 * @parm: the parameter to change 318 * @val: the parameter value to overwrite 319 */ 320 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid, 321 unsigned int parm, unsigned int val) 322 { 323 unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm; 324 int err; 325 326 if (!codec->regmap) 327 return -EINVAL; 328 329 codec->caps_overwriting = true; 330 err = snd_hdac_regmap_write_raw(codec, verb, val); 331 codec->caps_overwriting = false; 332 return err; 333 } 334 EXPORT_SYMBOL_GPL(snd_hdac_override_parm); 335 336 /** 337 * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes 338 * @codec: the codec object 339 * @nid: NID to inspect 340 * @start_id: the pointer to store the starting NID 341 * 342 * Returns the number of subtree nodes or zero if not found. 343 * This function reads parameters always without caching. 344 */ 345 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid, 346 hda_nid_t *start_id) 347 { 348 unsigned int parm; 349 350 parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT); 351 if (parm == -1) { 352 *start_id = 0; 353 return 0; 354 } 355 *start_id = (parm >> 16) & 0x7fff; 356 return (int)(parm & 0x7fff); 357 } 358 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes); 359 360 /* 361 * look for an AFG and MFG nodes 362 */ 363 static void setup_fg_nodes(struct hdac_device *codec) 364 { 365 int i, total_nodes, function_id; 366 hda_nid_t nid; 367 368 total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid); 369 for (i = 0; i < total_nodes; i++, nid++) { 370 function_id = snd_hdac_read_parm(codec, nid, 371 AC_PAR_FUNCTION_TYPE); 372 switch (function_id & 0xff) { 373 case AC_GRP_AUDIO_FUNCTION: 374 codec->afg = nid; 375 codec->afg_function_id = function_id & 0xff; 376 codec->afg_unsol = (function_id >> 8) & 1; 377 break; 378 case AC_GRP_MODEM_FUNCTION: 379 codec->mfg = nid; 380 codec->mfg_function_id = function_id & 0xff; 381 codec->mfg_unsol = (function_id >> 8) & 1; 382 break; 383 default: 384 break; 385 } 386 } 387 } 388 389 /** 390 * snd_hdac_refresh_widgets - Reset the widget start/end nodes 391 * @codec: the codec object 392 * @sysfs: re-initialize sysfs tree, too 393 */ 394 int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs) 395 { 396 hda_nid_t start_nid; 397 int nums, err; 398 399 nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid); 400 if (!start_nid || nums <= 0 || nums >= 0xff) { 401 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n", 402 codec->afg); 403 return -EINVAL; 404 } 405 406 if (sysfs) { 407 err = hda_widget_sysfs_reinit(codec, start_nid, nums); 408 if (err < 0) 409 return err; 410 } 411 412 codec->num_nodes = nums; 413 codec->start_nid = start_nid; 414 codec->end_nid = start_nid + nums; 415 return 0; 416 } 417 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets); 418 419 /* return CONNLIST_LEN parameter of the given widget */ 420 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid) 421 { 422 unsigned int wcaps = get_wcaps(codec, nid); 423 unsigned int parm; 424 425 if (!(wcaps & AC_WCAP_CONN_LIST) && 426 get_wcaps_type(wcaps) != AC_WID_VOL_KNB) 427 return 0; 428 429 parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN); 430 if (parm == -1) 431 parm = 0; 432 return parm; 433 } 434 435 /** 436 * snd_hdac_get_connections - get a widget connection list 437 * @codec: the codec object 438 * @nid: NID 439 * @conn_list: the array to store the results, can be NULL 440 * @max_conns: the max size of the given array 441 * 442 * Returns the number of connected widgets, zero for no connection, or a 443 * negative error code. When the number of elements don't fit with the 444 * given array size, it returns -ENOSPC. 445 * 446 * When @conn_list is NULL, it just checks the number of connections. 447 */ 448 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid, 449 hda_nid_t *conn_list, int max_conns) 450 { 451 unsigned int parm; 452 int i, conn_len, conns, err; 453 unsigned int shift, num_elems, mask; 454 hda_nid_t prev_nid; 455 int null_count = 0; 456 457 parm = get_num_conns(codec, nid); 458 if (!parm) 459 return 0; 460 461 if (parm & AC_CLIST_LONG) { 462 /* long form */ 463 shift = 16; 464 num_elems = 2; 465 } else { 466 /* short form */ 467 shift = 8; 468 num_elems = 4; 469 } 470 conn_len = parm & AC_CLIST_LENGTH; 471 mask = (1 << (shift-1)) - 1; 472 473 if (!conn_len) 474 return 0; /* no connection */ 475 476 if (conn_len == 1) { 477 /* single connection */ 478 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0, 479 &parm); 480 if (err < 0) 481 return err; 482 if (conn_list) 483 conn_list[0] = parm & mask; 484 return 1; 485 } 486 487 /* multi connection */ 488 conns = 0; 489 prev_nid = 0; 490 for (i = 0; i < conn_len; i++) { 491 int range_val; 492 hda_nid_t val, n; 493 494 if (i % num_elems == 0) { 495 err = snd_hdac_read(codec, nid, 496 AC_VERB_GET_CONNECT_LIST, i, 497 &parm); 498 if (err < 0) 499 return -EIO; 500 } 501 range_val = !!(parm & (1 << (shift-1))); /* ranges */ 502 val = parm & mask; 503 if (val == 0 && null_count++) { /* no second chance */ 504 dev_dbg(&codec->dev, 505 "invalid CONNECT_LIST verb %x[%i]:%x\n", 506 nid, i, parm); 507 return 0; 508 } 509 parm >>= shift; 510 if (range_val) { 511 /* ranges between the previous and this one */ 512 if (!prev_nid || prev_nid >= val) { 513 dev_warn(&codec->dev, 514 "invalid dep_range_val %x:%x\n", 515 prev_nid, val); 516 continue; 517 } 518 for (n = prev_nid + 1; n <= val; n++) { 519 if (conn_list) { 520 if (conns >= max_conns) 521 return -ENOSPC; 522 conn_list[conns] = n; 523 } 524 conns++; 525 } 526 } else { 527 if (conn_list) { 528 if (conns >= max_conns) 529 return -ENOSPC; 530 conn_list[conns] = val; 531 } 532 conns++; 533 } 534 prev_nid = val; 535 } 536 return conns; 537 } 538 EXPORT_SYMBOL_GPL(snd_hdac_get_connections); 539 540 #ifdef CONFIG_PM 541 /** 542 * snd_hdac_power_up - power up the codec 543 * @codec: the codec object 544 * 545 * This function calls the runtime PM helper to power up the given codec. 546 * Unlike snd_hdac_power_up_pm(), you should call this only for the code 547 * path that isn't included in PM path. Otherwise it gets stuck. 548 * 549 * Returns zero if successful, or a negative error code. 550 */ 551 int snd_hdac_power_up(struct hdac_device *codec) 552 { 553 return pm_runtime_get_sync(&codec->dev); 554 } 555 EXPORT_SYMBOL_GPL(snd_hdac_power_up); 556 557 /** 558 * snd_hdac_power_down - power down the codec 559 * @codec: the codec object 560 * 561 * Returns zero if successful, or a negative error code. 562 */ 563 int snd_hdac_power_down(struct hdac_device *codec) 564 { 565 struct device *dev = &codec->dev; 566 567 pm_runtime_mark_last_busy(dev); 568 return pm_runtime_put_autosuspend(dev); 569 } 570 EXPORT_SYMBOL_GPL(snd_hdac_power_down); 571 572 /** 573 * snd_hdac_power_up_pm - power up the codec 574 * @codec: the codec object 575 * 576 * This function can be called in a recursive code path like init code 577 * which may be called by PM suspend/resume again. OTOH, if a power-up 578 * call must wake up the sleeper (e.g. in a kctl callback), use 579 * snd_hdac_power_up() instead. 580 * 581 * Returns zero if successful, or a negative error code. 582 */ 583 int snd_hdac_power_up_pm(struct hdac_device *codec) 584 { 585 if (!atomic_inc_not_zero(&codec->in_pm)) 586 return snd_hdac_power_up(codec); 587 return 0; 588 } 589 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm); 590 591 /* like snd_hdac_power_up_pm(), but only increment the pm count when 592 * already powered up. Returns -1 if not powered up, 1 if incremented 593 * or 0 if unchanged. Only used in hdac_regmap.c 594 */ 595 int snd_hdac_keep_power_up(struct hdac_device *codec) 596 { 597 if (!atomic_inc_not_zero(&codec->in_pm)) { 598 int ret = pm_runtime_get_if_in_use(&codec->dev); 599 if (!ret) 600 return -1; 601 if (ret < 0) 602 return 0; 603 } 604 return 1; 605 } 606 607 /** 608 * snd_hdac_power_down_pm - power down the codec 609 * @codec: the codec object 610 * 611 * Like snd_hdac_power_up_pm(), this function is used in a recursive 612 * code path like init code which may be called by PM suspend/resume again. 613 * 614 * Returns zero if successful, or a negative error code. 615 */ 616 int snd_hdac_power_down_pm(struct hdac_device *codec) 617 { 618 if (atomic_dec_if_positive(&codec->in_pm) < 0) 619 return snd_hdac_power_down(codec); 620 return 0; 621 } 622 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm); 623 #endif 624 625 /** 626 * snd_hdac_link_power - Enable/disable the link power for a codec 627 * @codec: the codec object 628 * @bool: enable or disable the link power 629 */ 630 int snd_hdac_link_power(struct hdac_device *codec, bool enable) 631 { 632 if (!codec->link_power_control) 633 return 0; 634 635 if (codec->bus->ops->link_power) 636 return codec->bus->ops->link_power(codec->bus, enable); 637 else 638 return -EINVAL; 639 } 640 EXPORT_SYMBOL_GPL(snd_hdac_link_power); 641 642 /* codec vendor labels */ 643 struct hda_vendor_id { 644 unsigned int id; 645 const char *name; 646 }; 647 648 static struct hda_vendor_id hda_vendor_ids[] = { 649 { 0x1002, "ATI" }, 650 { 0x1013, "Cirrus Logic" }, 651 { 0x1057, "Motorola" }, 652 { 0x1095, "Silicon Image" }, 653 { 0x10de, "Nvidia" }, 654 { 0x10ec, "Realtek" }, 655 { 0x1102, "Creative" }, 656 { 0x1106, "VIA" }, 657 { 0x111d, "IDT" }, 658 { 0x11c1, "LSI" }, 659 { 0x11d4, "Analog Devices" }, 660 { 0x13f6, "C-Media" }, 661 { 0x14f1, "Conexant" }, 662 { 0x17e8, "Chrontel" }, 663 { 0x1854, "LG" }, 664 { 0x1aec, "Wolfson Microelectronics" }, 665 { 0x1af4, "QEMU" }, 666 { 0x434d, "C-Media" }, 667 { 0x8086, "Intel" }, 668 { 0x8384, "SigmaTel" }, 669 {} /* terminator */ 670 }; 671 672 /* store the codec vendor name */ 673 static int get_codec_vendor_name(struct hdac_device *codec) 674 { 675 const struct hda_vendor_id *c; 676 u16 vendor_id = codec->vendor_id >> 16; 677 678 for (c = hda_vendor_ids; c->id; c++) { 679 if (c->id == vendor_id) { 680 codec->vendor_name = kstrdup(c->name, GFP_KERNEL); 681 return codec->vendor_name ? 0 : -ENOMEM; 682 } 683 } 684 685 codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id); 686 return codec->vendor_name ? 0 : -ENOMEM; 687 } 688 689 /* 690 * stream formats 691 */ 692 struct hda_rate_tbl { 693 unsigned int hz; 694 unsigned int alsa_bits; 695 unsigned int hda_fmt; 696 }; 697 698 /* rate = base * mult / div */ 699 #define HDA_RATE(base, mult, div) \ 700 (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \ 701 (((div) - 1) << AC_FMT_DIV_SHIFT)) 702 703 static struct hda_rate_tbl rate_bits[] = { 704 /* rate in Hz, ALSA rate bitmask, HDA format value */ 705 706 /* autodetected value used in snd_hda_query_supported_pcm */ 707 { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) }, 708 { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) }, 709 { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) }, 710 { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) }, 711 { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) }, 712 { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) }, 713 { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) }, 714 { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) }, 715 { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) }, 716 { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) }, 717 { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) }, 718 #define AC_PAR_PCM_RATE_BITS 11 719 /* up to bits 10, 384kHZ isn't supported properly */ 720 721 /* not autodetected value */ 722 { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) }, 723 724 { 0 } /* terminator */ 725 }; 726 727 /** 728 * snd_hdac_calc_stream_format - calculate the format bitset 729 * @rate: the sample rate 730 * @channels: the number of channels 731 * @format: the PCM format (SNDRV_PCM_FORMAT_XXX) 732 * @maxbps: the max. bps 733 * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant) 734 * 735 * Calculate the format bitset from the given rate, channels and th PCM format. 736 * 737 * Return zero if invalid. 738 */ 739 unsigned int snd_hdac_calc_stream_format(unsigned int rate, 740 unsigned int channels, 741 unsigned int format, 742 unsigned int maxbps, 743 unsigned short spdif_ctls) 744 { 745 int i; 746 unsigned int val = 0; 747 748 for (i = 0; rate_bits[i].hz; i++) 749 if (rate_bits[i].hz == rate) { 750 val = rate_bits[i].hda_fmt; 751 break; 752 } 753 if (!rate_bits[i].hz) 754 return 0; 755 756 if (channels == 0 || channels > 8) 757 return 0; 758 val |= channels - 1; 759 760 switch (snd_pcm_format_width(format)) { 761 case 8: 762 val |= AC_FMT_BITS_8; 763 break; 764 case 16: 765 val |= AC_FMT_BITS_16; 766 break; 767 case 20: 768 case 24: 769 case 32: 770 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE) 771 val |= AC_FMT_BITS_32; 772 else if (maxbps >= 24) 773 val |= AC_FMT_BITS_24; 774 else 775 val |= AC_FMT_BITS_20; 776 break; 777 default: 778 return 0; 779 } 780 781 if (spdif_ctls & AC_DIG1_NONAUDIO) 782 val |= AC_FMT_TYPE_NON_PCM; 783 784 return val; 785 } 786 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format); 787 788 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid) 789 { 790 unsigned int val = 0; 791 792 if (nid != codec->afg && 793 (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD)) 794 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM); 795 if (!val || val == -1) 796 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM); 797 if (!val || val == -1) 798 return 0; 799 return val; 800 } 801 802 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid) 803 { 804 unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM); 805 806 if (!streams || streams == -1) 807 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM); 808 if (!streams || streams == -1) 809 return 0; 810 return streams; 811 } 812 813 /** 814 * snd_hdac_query_supported_pcm - query the supported PCM rates and formats 815 * @codec: the codec object 816 * @nid: NID to query 817 * @ratesp: the pointer to store the detected rate bitflags 818 * @formatsp: the pointer to store the detected formats 819 * @bpsp: the pointer to store the detected format widths 820 * 821 * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp 822 * or @bsps argument is ignored. 823 * 824 * Returns 0 if successful, otherwise a negative error code. 825 */ 826 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid, 827 u32 *ratesp, u64 *formatsp, unsigned int *bpsp) 828 { 829 unsigned int i, val, wcaps; 830 831 wcaps = get_wcaps(codec, nid); 832 val = query_pcm_param(codec, nid); 833 834 if (ratesp) { 835 u32 rates = 0; 836 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) { 837 if (val & (1 << i)) 838 rates |= rate_bits[i].alsa_bits; 839 } 840 if (rates == 0) { 841 dev_err(&codec->dev, 842 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n", 843 nid, val, 844 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0); 845 return -EIO; 846 } 847 *ratesp = rates; 848 } 849 850 if (formatsp || bpsp) { 851 u64 formats = 0; 852 unsigned int streams, bps; 853 854 streams = query_stream_param(codec, nid); 855 if (!streams) 856 return -EIO; 857 858 bps = 0; 859 if (streams & AC_SUPFMT_PCM) { 860 if (val & AC_SUPPCM_BITS_8) { 861 formats |= SNDRV_PCM_FMTBIT_U8; 862 bps = 8; 863 } 864 if (val & AC_SUPPCM_BITS_16) { 865 formats |= SNDRV_PCM_FMTBIT_S16_LE; 866 bps = 16; 867 } 868 if (wcaps & AC_WCAP_DIGITAL) { 869 if (val & AC_SUPPCM_BITS_32) 870 formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE; 871 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24)) 872 formats |= SNDRV_PCM_FMTBIT_S32_LE; 873 if (val & AC_SUPPCM_BITS_24) 874 bps = 24; 875 else if (val & AC_SUPPCM_BITS_20) 876 bps = 20; 877 } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24| 878 AC_SUPPCM_BITS_32)) { 879 formats |= SNDRV_PCM_FMTBIT_S32_LE; 880 if (val & AC_SUPPCM_BITS_32) 881 bps = 32; 882 else if (val & AC_SUPPCM_BITS_24) 883 bps = 24; 884 else if (val & AC_SUPPCM_BITS_20) 885 bps = 20; 886 } 887 } 888 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */ 889 if (streams & AC_SUPFMT_FLOAT32) { 890 formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; 891 if (!bps) 892 bps = 32; 893 } 894 #endif 895 if (streams == AC_SUPFMT_AC3) { 896 /* should be exclusive */ 897 /* temporary hack: we have still no proper support 898 * for the direct AC3 stream... 899 */ 900 formats |= SNDRV_PCM_FMTBIT_U8; 901 bps = 8; 902 } 903 if (formats == 0) { 904 dev_err(&codec->dev, 905 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n", 906 nid, val, 907 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0, 908 streams); 909 return -EIO; 910 } 911 if (formatsp) 912 *formatsp = formats; 913 if (bpsp) 914 *bpsp = bps; 915 } 916 917 return 0; 918 } 919 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm); 920 921 /** 922 * snd_hdac_is_supported_format - Check the validity of the format 923 * @codec: the codec object 924 * @nid: NID to check 925 * @format: the HD-audio format value to check 926 * 927 * Check whether the given node supports the format value. 928 * 929 * Returns true if supported, false if not. 930 */ 931 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid, 932 unsigned int format) 933 { 934 int i; 935 unsigned int val = 0, rate, stream; 936 937 val = query_pcm_param(codec, nid); 938 if (!val) 939 return false; 940 941 rate = format & 0xff00; 942 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) 943 if (rate_bits[i].hda_fmt == rate) { 944 if (val & (1 << i)) 945 break; 946 return false; 947 } 948 if (i >= AC_PAR_PCM_RATE_BITS) 949 return false; 950 951 stream = query_stream_param(codec, nid); 952 if (!stream) 953 return false; 954 955 if (stream & AC_SUPFMT_PCM) { 956 switch (format & 0xf0) { 957 case 0x00: 958 if (!(val & AC_SUPPCM_BITS_8)) 959 return false; 960 break; 961 case 0x10: 962 if (!(val & AC_SUPPCM_BITS_16)) 963 return false; 964 break; 965 case 0x20: 966 if (!(val & AC_SUPPCM_BITS_20)) 967 return false; 968 break; 969 case 0x30: 970 if (!(val & AC_SUPPCM_BITS_24)) 971 return false; 972 break; 973 case 0x40: 974 if (!(val & AC_SUPPCM_BITS_32)) 975 return false; 976 break; 977 default: 978 return false; 979 } 980 } else { 981 /* FIXME: check for float32 and AC3? */ 982 } 983 984 return true; 985 } 986 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format); 987 988 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid, 989 int flags, unsigned int verb, unsigned int parm) 990 { 991 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm); 992 unsigned int res; 993 994 if (snd_hdac_exec_verb(hdac, cmd, flags, &res)) 995 return -1; 996 997 return res; 998 } 999 1000 static int codec_write(struct hdac_device *hdac, hda_nid_t nid, 1001 int flags, unsigned int verb, unsigned int parm) 1002 { 1003 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm); 1004 1005 return snd_hdac_exec_verb(hdac, cmd, flags, NULL); 1006 } 1007 1008 /** 1009 * snd_hdac_codec_read - send a command and get the response 1010 * @hdac: the HDAC device 1011 * @nid: NID to send the command 1012 * @flags: optional bit flags 1013 * @verb: the verb to send 1014 * @parm: the parameter for the verb 1015 * 1016 * Send a single command and read the corresponding response. 1017 * 1018 * Returns the obtained response value, or -1 for an error. 1019 */ 1020 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid, 1021 int flags, unsigned int verb, unsigned int parm) 1022 { 1023 return codec_read(hdac, nid, flags, verb, parm); 1024 } 1025 EXPORT_SYMBOL_GPL(snd_hdac_codec_read); 1026 1027 /** 1028 * snd_hdac_codec_write - send a single command without waiting for response 1029 * @hdac: the HDAC device 1030 * @nid: NID to send the command 1031 * @flags: optional bit flags 1032 * @verb: the verb to send 1033 * @parm: the parameter for the verb 1034 * 1035 * Send a single command without waiting for response. 1036 * 1037 * Returns 0 if successful, or a negative error code. 1038 */ 1039 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid, 1040 int flags, unsigned int verb, unsigned int parm) 1041 { 1042 return codec_write(hdac, nid, flags, verb, parm); 1043 } 1044 EXPORT_SYMBOL_GPL(snd_hdac_codec_write); 1045 1046 /** 1047 * snd_hdac_check_power_state - check whether the actual power state matches 1048 * with the target state 1049 * 1050 * @hdac: the HDAC device 1051 * @nid: NID to send the command 1052 * @target_state: target state to check for 1053 * 1054 * Return true if state matches, false if not 1055 */ 1056 bool snd_hdac_check_power_state(struct hdac_device *hdac, 1057 hda_nid_t nid, unsigned int target_state) 1058 { 1059 unsigned int state = codec_read(hdac, nid, 0, 1060 AC_VERB_GET_POWER_STATE, 0); 1061 1062 if (state & AC_PWRST_ERROR) 1063 return true; 1064 state = (state >> 4) & 0x0f; 1065 return (state == target_state); 1066 } 1067 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state); 1068 /** 1069 * snd_hdac_sync_power_state - wait until actual power state matches 1070 * with the target state 1071 * 1072 * @hdac: the HDAC device 1073 * @nid: NID to send the command 1074 * @target_state: target state to check for 1075 * 1076 * Return power state or PS_ERROR if codec rejects GET verb. 1077 */ 1078 unsigned int snd_hdac_sync_power_state(struct hdac_device *codec, 1079 hda_nid_t nid, unsigned int power_state) 1080 { 1081 unsigned long end_time = jiffies + msecs_to_jiffies(500); 1082 unsigned int state, actual_state, count; 1083 1084 for (count = 0; count < 500; count++) { 1085 state = snd_hdac_codec_read(codec, nid, 0, 1086 AC_VERB_GET_POWER_STATE, 0); 1087 if (state & AC_PWRST_ERROR) { 1088 msleep(20); 1089 break; 1090 } 1091 actual_state = (state >> 4) & 0x0f; 1092 if (actual_state == power_state) 1093 break; 1094 if (time_after_eq(jiffies, end_time)) 1095 break; 1096 /* wait until the codec reachs to the target state */ 1097 msleep(1); 1098 } 1099 return state; 1100 } 1101 EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state); 1102