1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * HD-audio codec core device 4 */ 5 6 #include <linux/init.h> 7 #include <linux/delay.h> 8 #include <linux/device.h> 9 #include <linux/slab.h> 10 #include <linux/module.h> 11 #include <linux/export.h> 12 #include <linux/pm_runtime.h> 13 #include <sound/hdaudio.h> 14 #include <sound/hda_regmap.h> 15 #include <sound/pcm.h> 16 #include "local.h" 17 18 static void setup_fg_nodes(struct hdac_device *codec); 19 static int get_codec_vendor_name(struct hdac_device *codec); 20 21 static void default_release(struct device *dev) 22 { 23 snd_hdac_device_exit(container_of(dev, struct hdac_device, dev)); 24 } 25 26 /** 27 * snd_hdac_device_init - initialize the HD-audio codec base device 28 * @codec: device to initialize 29 * @bus: but to attach 30 * @name: device name string 31 * @addr: codec address 32 * 33 * Returns zero for success or a negative error code. 34 * 35 * This function increments the runtime PM counter and marks it active. 36 * The caller needs to turn it off appropriately later. 37 * 38 * The caller needs to set the device's release op properly by itself. 39 */ 40 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus, 41 const char *name, unsigned int addr) 42 { 43 struct device *dev; 44 hda_nid_t fg; 45 int err; 46 47 dev = &codec->dev; 48 device_initialize(dev); 49 dev->parent = bus->dev; 50 dev->bus = &snd_hda_bus_type; 51 dev->release = default_release; 52 dev->groups = hdac_dev_attr_groups; 53 dev_set_name(dev, "%s", name); 54 device_enable_async_suspend(dev); 55 56 codec->bus = bus; 57 codec->addr = addr; 58 codec->type = HDA_DEV_CORE; 59 mutex_init(&codec->widget_lock); 60 pm_runtime_set_active(&codec->dev); 61 pm_runtime_get_noresume(&codec->dev); 62 atomic_set(&codec->in_pm, 0); 63 64 err = snd_hdac_bus_add_device(bus, codec); 65 if (err < 0) 66 goto error; 67 68 /* fill parameters */ 69 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 70 AC_PAR_VENDOR_ID); 71 if (codec->vendor_id == -1) { 72 /* read again, hopefully the access method was corrected 73 * in the last read... 74 */ 75 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 76 AC_PAR_VENDOR_ID); 77 } 78 79 codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 80 AC_PAR_SUBSYSTEM_ID); 81 codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 82 AC_PAR_REV_ID); 83 84 setup_fg_nodes(codec); 85 if (!codec->afg && !codec->mfg) { 86 dev_err(dev, "no AFG or MFG node found\n"); 87 err = -ENODEV; 88 goto error; 89 } 90 91 fg = codec->afg ? codec->afg : codec->mfg; 92 93 err = snd_hdac_refresh_widgets(codec); 94 if (err < 0) 95 goto error; 96 97 codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE); 98 /* reread ssid if not set by parameter */ 99 if (codec->subsystem_id == -1 || codec->subsystem_id == 0) 100 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0, 101 &codec->subsystem_id); 102 103 err = get_codec_vendor_name(codec); 104 if (err < 0) 105 goto error; 106 107 codec->chip_name = kasprintf(GFP_KERNEL, "ID %x", 108 codec->vendor_id & 0xffff); 109 if (!codec->chip_name) { 110 err = -ENOMEM; 111 goto error; 112 } 113 114 return 0; 115 116 error: 117 put_device(&codec->dev); 118 return err; 119 } 120 EXPORT_SYMBOL_GPL(snd_hdac_device_init); 121 122 /** 123 * snd_hdac_device_exit - clean up the HD-audio codec base device 124 * @codec: device to clean up 125 */ 126 void snd_hdac_device_exit(struct hdac_device *codec) 127 { 128 pm_runtime_put_noidle(&codec->dev); 129 snd_hdac_bus_remove_device(codec->bus, codec); 130 kfree(codec->vendor_name); 131 kfree(codec->chip_name); 132 } 133 EXPORT_SYMBOL_GPL(snd_hdac_device_exit); 134 135 /** 136 * snd_hdac_device_register - register the hd-audio codec base device 137 * codec: the device to register 138 */ 139 int snd_hdac_device_register(struct hdac_device *codec) 140 { 141 int err; 142 143 err = device_add(&codec->dev); 144 if (err < 0) 145 return err; 146 mutex_lock(&codec->widget_lock); 147 err = hda_widget_sysfs_init(codec); 148 mutex_unlock(&codec->widget_lock); 149 if (err < 0) { 150 device_del(&codec->dev); 151 return err; 152 } 153 154 return 0; 155 } 156 EXPORT_SYMBOL_GPL(snd_hdac_device_register); 157 158 /** 159 * snd_hdac_device_unregister - unregister the hd-audio codec base device 160 * codec: the device to unregister 161 */ 162 void snd_hdac_device_unregister(struct hdac_device *codec) 163 { 164 if (device_is_registered(&codec->dev)) { 165 mutex_lock(&codec->widget_lock); 166 hda_widget_sysfs_exit(codec); 167 mutex_unlock(&codec->widget_lock); 168 device_del(&codec->dev); 169 snd_hdac_bus_remove_device(codec->bus, codec); 170 } 171 } 172 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister); 173 174 /** 175 * snd_hdac_device_set_chip_name - set/update the codec name 176 * @codec: the HDAC device 177 * @name: name string to set 178 * 179 * Returns 0 if the name is set or updated, or a negative error code. 180 */ 181 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name) 182 { 183 char *newname; 184 185 if (!name) 186 return 0; 187 newname = kstrdup(name, GFP_KERNEL); 188 if (!newname) 189 return -ENOMEM; 190 kfree(codec->chip_name); 191 codec->chip_name = newname; 192 return 0; 193 } 194 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name); 195 196 /** 197 * snd_hdac_codec_modalias - give the module alias name 198 * @codec: HDAC device 199 * @buf: string buffer to store 200 * @size: string buffer size 201 * 202 * Returns the size of string, like snprintf(), or a negative error code. 203 */ 204 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size) 205 { 206 return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n", 207 codec->vendor_id, codec->revision_id, codec->type); 208 } 209 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias); 210 211 /** 212 * snd_hdac_make_cmd - compose a 32bit command word to be sent to the 213 * HD-audio controller 214 * @codec: the codec object 215 * @nid: NID to encode 216 * @verb: verb to encode 217 * @parm: parameter to encode 218 * 219 * Return an encoded command verb or -1 for error. 220 */ 221 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid, 222 unsigned int verb, unsigned int parm) 223 { 224 u32 val, addr; 225 226 addr = codec->addr; 227 if ((addr & ~0xf) || (nid & ~0x7f) || 228 (verb & ~0xfff) || (parm & ~0xffff)) { 229 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n", 230 addr, nid, verb, parm); 231 return -1; 232 } 233 234 val = addr << 28; 235 val |= (u32)nid << 20; 236 val |= verb << 8; 237 val |= parm; 238 return val; 239 } 240 EXPORT_SYMBOL_GPL(snd_hdac_make_cmd); 241 242 /** 243 * snd_hdac_exec_verb - execute an encoded verb 244 * @codec: the codec object 245 * @cmd: encoded verb to execute 246 * @flags: optional flags, pass zero for default 247 * @res: the pointer to store the result, NULL if running async 248 * 249 * Returns zero if successful, or a negative error code. 250 * 251 * This calls the exec_verb op when set in hdac_codec. If not, 252 * call the default snd_hdac_bus_exec_verb(). 253 */ 254 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd, 255 unsigned int flags, unsigned int *res) 256 { 257 if (codec->exec_verb) 258 return codec->exec_verb(codec, cmd, flags, res); 259 return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res); 260 } 261 EXPORT_SYMBOL_GPL(snd_hdac_exec_verb); 262 263 264 /** 265 * snd_hdac_read - execute a verb 266 * @codec: the codec object 267 * @nid: NID to execute a verb 268 * @verb: verb to execute 269 * @parm: parameter for a verb 270 * @res: the pointer to store the result, NULL if running async 271 * 272 * Returns zero if successful, or a negative error code. 273 */ 274 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid, 275 unsigned int verb, unsigned int parm, unsigned int *res) 276 { 277 unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm); 278 279 return snd_hdac_exec_verb(codec, cmd, 0, res); 280 } 281 EXPORT_SYMBOL_GPL(snd_hdac_read); 282 283 /** 284 * _snd_hdac_read_parm - read a parmeter 285 * 286 * This function returns zero or an error unlike snd_hdac_read_parm(). 287 */ 288 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm, 289 unsigned int *res) 290 { 291 unsigned int cmd; 292 293 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; 294 return snd_hdac_regmap_read_raw(codec, cmd, res); 295 } 296 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm); 297 298 /** 299 * snd_hdac_read_parm_uncached - read a codec parameter without caching 300 * @codec: the codec object 301 * @nid: NID to read a parameter 302 * @parm: parameter to read 303 * 304 * Returns -1 for error. If you need to distinguish the error more 305 * strictly, use snd_hdac_read() directly. 306 */ 307 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid, 308 int parm) 309 { 310 unsigned int cmd, val; 311 312 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; 313 if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0) 314 return -1; 315 return val; 316 } 317 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached); 318 319 /** 320 * snd_hdac_override_parm - override read-only parameters 321 * @codec: the codec object 322 * @nid: NID for the parameter 323 * @parm: the parameter to change 324 * @val: the parameter value to overwrite 325 */ 326 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid, 327 unsigned int parm, unsigned int val) 328 { 329 unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm; 330 int err; 331 332 if (!codec->regmap) 333 return -EINVAL; 334 335 codec->caps_overwriting = true; 336 err = snd_hdac_regmap_write_raw(codec, verb, val); 337 codec->caps_overwriting = false; 338 return err; 339 } 340 EXPORT_SYMBOL_GPL(snd_hdac_override_parm); 341 342 /** 343 * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes 344 * @codec: the codec object 345 * @nid: NID to inspect 346 * @start_id: the pointer to store the starting NID 347 * 348 * Returns the number of subtree nodes or zero if not found. 349 * This function reads parameters always without caching. 350 */ 351 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid, 352 hda_nid_t *start_id) 353 { 354 unsigned int parm; 355 356 parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT); 357 if (parm == -1) { 358 *start_id = 0; 359 return 0; 360 } 361 *start_id = (parm >> 16) & 0x7fff; 362 return (int)(parm & 0x7fff); 363 } 364 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes); 365 366 /* 367 * look for an AFG and MFG nodes 368 */ 369 static void setup_fg_nodes(struct hdac_device *codec) 370 { 371 int i, total_nodes, function_id; 372 hda_nid_t nid; 373 374 total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid); 375 for (i = 0; i < total_nodes; i++, nid++) { 376 function_id = snd_hdac_read_parm(codec, nid, 377 AC_PAR_FUNCTION_TYPE); 378 switch (function_id & 0xff) { 379 case AC_GRP_AUDIO_FUNCTION: 380 codec->afg = nid; 381 codec->afg_function_id = function_id & 0xff; 382 codec->afg_unsol = (function_id >> 8) & 1; 383 break; 384 case AC_GRP_MODEM_FUNCTION: 385 codec->mfg = nid; 386 codec->mfg_function_id = function_id & 0xff; 387 codec->mfg_unsol = (function_id >> 8) & 1; 388 break; 389 default: 390 break; 391 } 392 } 393 } 394 395 /** 396 * snd_hdac_refresh_widgets - Reset the widget start/end nodes 397 * @codec: the codec object 398 */ 399 int snd_hdac_refresh_widgets(struct hdac_device *codec) 400 { 401 hda_nid_t start_nid; 402 int nums, err = 0; 403 404 /* 405 * Serialize against multiple threads trying to update the sysfs 406 * widgets array. 407 */ 408 mutex_lock(&codec->widget_lock); 409 nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid); 410 if (!start_nid || nums <= 0 || nums >= 0xff) { 411 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n", 412 codec->afg); 413 err = -EINVAL; 414 goto unlock; 415 } 416 417 err = hda_widget_sysfs_reinit(codec, start_nid, nums); 418 if (err < 0) 419 goto unlock; 420 421 codec->num_nodes = nums; 422 codec->start_nid = start_nid; 423 codec->end_nid = start_nid + nums; 424 unlock: 425 mutex_unlock(&codec->widget_lock); 426 return err; 427 } 428 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets); 429 430 /* return CONNLIST_LEN parameter of the given widget */ 431 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid) 432 { 433 unsigned int wcaps = get_wcaps(codec, nid); 434 unsigned int parm; 435 436 if (!(wcaps & AC_WCAP_CONN_LIST) && 437 get_wcaps_type(wcaps) != AC_WID_VOL_KNB) 438 return 0; 439 440 parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN); 441 if (parm == -1) 442 parm = 0; 443 return parm; 444 } 445 446 /** 447 * snd_hdac_get_connections - get a widget connection list 448 * @codec: the codec object 449 * @nid: NID 450 * @conn_list: the array to store the results, can be NULL 451 * @max_conns: the max size of the given array 452 * 453 * Returns the number of connected widgets, zero for no connection, or a 454 * negative error code. When the number of elements don't fit with the 455 * given array size, it returns -ENOSPC. 456 * 457 * When @conn_list is NULL, it just checks the number of connections. 458 */ 459 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid, 460 hda_nid_t *conn_list, int max_conns) 461 { 462 unsigned int parm; 463 int i, conn_len, conns, err; 464 unsigned int shift, num_elems, mask; 465 hda_nid_t prev_nid; 466 int null_count = 0; 467 468 parm = get_num_conns(codec, nid); 469 if (!parm) 470 return 0; 471 472 if (parm & AC_CLIST_LONG) { 473 /* long form */ 474 shift = 16; 475 num_elems = 2; 476 } else { 477 /* short form */ 478 shift = 8; 479 num_elems = 4; 480 } 481 conn_len = parm & AC_CLIST_LENGTH; 482 mask = (1 << (shift-1)) - 1; 483 484 if (!conn_len) 485 return 0; /* no connection */ 486 487 if (conn_len == 1) { 488 /* single connection */ 489 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0, 490 &parm); 491 if (err < 0) 492 return err; 493 if (conn_list) 494 conn_list[0] = parm & mask; 495 return 1; 496 } 497 498 /* multi connection */ 499 conns = 0; 500 prev_nid = 0; 501 for (i = 0; i < conn_len; i++) { 502 int range_val; 503 hda_nid_t val, n; 504 505 if (i % num_elems == 0) { 506 err = snd_hdac_read(codec, nid, 507 AC_VERB_GET_CONNECT_LIST, i, 508 &parm); 509 if (err < 0) 510 return -EIO; 511 } 512 range_val = !!(parm & (1 << (shift-1))); /* ranges */ 513 val = parm & mask; 514 if (val == 0 && null_count++) { /* no second chance */ 515 dev_dbg(&codec->dev, 516 "invalid CONNECT_LIST verb %x[%i]:%x\n", 517 nid, i, parm); 518 return 0; 519 } 520 parm >>= shift; 521 if (range_val) { 522 /* ranges between the previous and this one */ 523 if (!prev_nid || prev_nid >= val) { 524 dev_warn(&codec->dev, 525 "invalid dep_range_val %x:%x\n", 526 prev_nid, val); 527 continue; 528 } 529 for (n = prev_nid + 1; n <= val; n++) { 530 if (conn_list) { 531 if (conns >= max_conns) 532 return -ENOSPC; 533 conn_list[conns] = n; 534 } 535 conns++; 536 } 537 } else { 538 if (conn_list) { 539 if (conns >= max_conns) 540 return -ENOSPC; 541 conn_list[conns] = val; 542 } 543 conns++; 544 } 545 prev_nid = val; 546 } 547 return conns; 548 } 549 EXPORT_SYMBOL_GPL(snd_hdac_get_connections); 550 551 #ifdef CONFIG_PM 552 /** 553 * snd_hdac_power_up - power up the codec 554 * @codec: the codec object 555 * 556 * This function calls the runtime PM helper to power up the given codec. 557 * Unlike snd_hdac_power_up_pm(), you should call this only for the code 558 * path that isn't included in PM path. Otherwise it gets stuck. 559 * 560 * Returns zero if successful, or a negative error code. 561 */ 562 int snd_hdac_power_up(struct hdac_device *codec) 563 { 564 return pm_runtime_get_sync(&codec->dev); 565 } 566 EXPORT_SYMBOL_GPL(snd_hdac_power_up); 567 568 /** 569 * snd_hdac_power_down - power down the codec 570 * @codec: the codec object 571 * 572 * Returns zero if successful, or a negative error code. 573 */ 574 int snd_hdac_power_down(struct hdac_device *codec) 575 { 576 struct device *dev = &codec->dev; 577 578 pm_runtime_mark_last_busy(dev); 579 return pm_runtime_put_autosuspend(dev); 580 } 581 EXPORT_SYMBOL_GPL(snd_hdac_power_down); 582 583 /** 584 * snd_hdac_power_up_pm - power up the codec 585 * @codec: the codec object 586 * 587 * This function can be called in a recursive code path like init code 588 * which may be called by PM suspend/resume again. OTOH, if a power-up 589 * call must wake up the sleeper (e.g. in a kctl callback), use 590 * snd_hdac_power_up() instead. 591 * 592 * Returns zero if successful, or a negative error code. 593 */ 594 int snd_hdac_power_up_pm(struct hdac_device *codec) 595 { 596 if (!atomic_inc_not_zero(&codec->in_pm)) 597 return snd_hdac_power_up(codec); 598 return 0; 599 } 600 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm); 601 602 /* like snd_hdac_power_up_pm(), but only increment the pm count when 603 * already powered up. Returns -1 if not powered up, 1 if incremented 604 * or 0 if unchanged. Only used in hdac_regmap.c 605 */ 606 int snd_hdac_keep_power_up(struct hdac_device *codec) 607 { 608 if (!atomic_inc_not_zero(&codec->in_pm)) { 609 int ret = pm_runtime_get_if_in_use(&codec->dev); 610 if (!ret) 611 return -1; 612 if (ret < 0) 613 return 0; 614 } 615 return 1; 616 } 617 618 /** 619 * snd_hdac_power_down_pm - power down the codec 620 * @codec: the codec object 621 * 622 * Like snd_hdac_power_up_pm(), this function is used in a recursive 623 * code path like init code which may be called by PM suspend/resume again. 624 * 625 * Returns zero if successful, or a negative error code. 626 */ 627 int snd_hdac_power_down_pm(struct hdac_device *codec) 628 { 629 if (atomic_dec_if_positive(&codec->in_pm) < 0) 630 return snd_hdac_power_down(codec); 631 return 0; 632 } 633 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm); 634 #endif 635 636 /* codec vendor labels */ 637 struct hda_vendor_id { 638 unsigned int id; 639 const char *name; 640 }; 641 642 static struct hda_vendor_id hda_vendor_ids[] = { 643 { 0x1002, "ATI" }, 644 { 0x1013, "Cirrus Logic" }, 645 { 0x1057, "Motorola" }, 646 { 0x1095, "Silicon Image" }, 647 { 0x10de, "Nvidia" }, 648 { 0x10ec, "Realtek" }, 649 { 0x1102, "Creative" }, 650 { 0x1106, "VIA" }, 651 { 0x111d, "IDT" }, 652 { 0x11c1, "LSI" }, 653 { 0x11d4, "Analog Devices" }, 654 { 0x13f6, "C-Media" }, 655 { 0x14f1, "Conexant" }, 656 { 0x17e8, "Chrontel" }, 657 { 0x1854, "LG" }, 658 { 0x1aec, "Wolfson Microelectronics" }, 659 { 0x1af4, "QEMU" }, 660 { 0x434d, "C-Media" }, 661 { 0x8086, "Intel" }, 662 { 0x8384, "SigmaTel" }, 663 {} /* terminator */ 664 }; 665 666 /* store the codec vendor name */ 667 static int get_codec_vendor_name(struct hdac_device *codec) 668 { 669 const struct hda_vendor_id *c; 670 u16 vendor_id = codec->vendor_id >> 16; 671 672 for (c = hda_vendor_ids; c->id; c++) { 673 if (c->id == vendor_id) { 674 codec->vendor_name = kstrdup(c->name, GFP_KERNEL); 675 return codec->vendor_name ? 0 : -ENOMEM; 676 } 677 } 678 679 codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id); 680 return codec->vendor_name ? 0 : -ENOMEM; 681 } 682 683 /* 684 * stream formats 685 */ 686 struct hda_rate_tbl { 687 unsigned int hz; 688 unsigned int alsa_bits; 689 unsigned int hda_fmt; 690 }; 691 692 /* rate = base * mult / div */ 693 #define HDA_RATE(base, mult, div) \ 694 (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \ 695 (((div) - 1) << AC_FMT_DIV_SHIFT)) 696 697 static struct hda_rate_tbl rate_bits[] = { 698 /* rate in Hz, ALSA rate bitmask, HDA format value */ 699 700 /* autodetected value used in snd_hda_query_supported_pcm */ 701 { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) }, 702 { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) }, 703 { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) }, 704 { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) }, 705 { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) }, 706 { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) }, 707 { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) }, 708 { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) }, 709 { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) }, 710 { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) }, 711 { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) }, 712 #define AC_PAR_PCM_RATE_BITS 11 713 /* up to bits 10, 384kHZ isn't supported properly */ 714 715 /* not autodetected value */ 716 { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) }, 717 718 { 0 } /* terminator */ 719 }; 720 721 /** 722 * snd_hdac_calc_stream_format - calculate the format bitset 723 * @rate: the sample rate 724 * @channels: the number of channels 725 * @format: the PCM format (SNDRV_PCM_FORMAT_XXX) 726 * @maxbps: the max. bps 727 * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant) 728 * 729 * Calculate the format bitset from the given rate, channels and th PCM format. 730 * 731 * Return zero if invalid. 732 */ 733 unsigned int snd_hdac_calc_stream_format(unsigned int rate, 734 unsigned int channels, 735 snd_pcm_format_t format, 736 unsigned int maxbps, 737 unsigned short spdif_ctls) 738 { 739 int i; 740 unsigned int val = 0; 741 742 for (i = 0; rate_bits[i].hz; i++) 743 if (rate_bits[i].hz == rate) { 744 val = rate_bits[i].hda_fmt; 745 break; 746 } 747 if (!rate_bits[i].hz) 748 return 0; 749 750 if (channels == 0 || channels > 8) 751 return 0; 752 val |= channels - 1; 753 754 switch (snd_pcm_format_width(format)) { 755 case 8: 756 val |= AC_FMT_BITS_8; 757 break; 758 case 16: 759 val |= AC_FMT_BITS_16; 760 break; 761 case 20: 762 case 24: 763 case 32: 764 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE) 765 val |= AC_FMT_BITS_32; 766 else if (maxbps >= 24) 767 val |= AC_FMT_BITS_24; 768 else 769 val |= AC_FMT_BITS_20; 770 break; 771 default: 772 return 0; 773 } 774 775 if (spdif_ctls & AC_DIG1_NONAUDIO) 776 val |= AC_FMT_TYPE_NON_PCM; 777 778 return val; 779 } 780 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format); 781 782 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid) 783 { 784 unsigned int val = 0; 785 786 if (nid != codec->afg && 787 (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD)) 788 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM); 789 if (!val || val == -1) 790 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM); 791 if (!val || val == -1) 792 return 0; 793 return val; 794 } 795 796 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid) 797 { 798 unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM); 799 800 if (!streams || streams == -1) 801 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM); 802 if (!streams || streams == -1) 803 return 0; 804 return streams; 805 } 806 807 /** 808 * snd_hdac_query_supported_pcm - query the supported PCM rates and formats 809 * @codec: the codec object 810 * @nid: NID to query 811 * @ratesp: the pointer to store the detected rate bitflags 812 * @formatsp: the pointer to store the detected formats 813 * @bpsp: the pointer to store the detected format widths 814 * 815 * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp 816 * or @bsps argument is ignored. 817 * 818 * Returns 0 if successful, otherwise a negative error code. 819 */ 820 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid, 821 u32 *ratesp, u64 *formatsp, unsigned int *bpsp) 822 { 823 unsigned int i, val, wcaps; 824 825 wcaps = get_wcaps(codec, nid); 826 val = query_pcm_param(codec, nid); 827 828 if (ratesp) { 829 u32 rates = 0; 830 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) { 831 if (val & (1 << i)) 832 rates |= rate_bits[i].alsa_bits; 833 } 834 if (rates == 0) { 835 dev_err(&codec->dev, 836 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n", 837 nid, val, 838 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0); 839 return -EIO; 840 } 841 *ratesp = rates; 842 } 843 844 if (formatsp || bpsp) { 845 u64 formats = 0; 846 unsigned int streams, bps; 847 848 streams = query_stream_param(codec, nid); 849 if (!streams) 850 return -EIO; 851 852 bps = 0; 853 if (streams & AC_SUPFMT_PCM) { 854 if (val & AC_SUPPCM_BITS_8) { 855 formats |= SNDRV_PCM_FMTBIT_U8; 856 bps = 8; 857 } 858 if (val & AC_SUPPCM_BITS_16) { 859 formats |= SNDRV_PCM_FMTBIT_S16_LE; 860 bps = 16; 861 } 862 if (wcaps & AC_WCAP_DIGITAL) { 863 if (val & AC_SUPPCM_BITS_32) 864 formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE; 865 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24)) 866 formats |= SNDRV_PCM_FMTBIT_S32_LE; 867 if (val & AC_SUPPCM_BITS_24) 868 bps = 24; 869 else if (val & AC_SUPPCM_BITS_20) 870 bps = 20; 871 } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24| 872 AC_SUPPCM_BITS_32)) { 873 formats |= SNDRV_PCM_FMTBIT_S32_LE; 874 if (val & AC_SUPPCM_BITS_32) 875 bps = 32; 876 else if (val & AC_SUPPCM_BITS_24) 877 bps = 24; 878 else if (val & AC_SUPPCM_BITS_20) 879 bps = 20; 880 } 881 } 882 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */ 883 if (streams & AC_SUPFMT_FLOAT32) { 884 formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; 885 if (!bps) 886 bps = 32; 887 } 888 #endif 889 if (streams == AC_SUPFMT_AC3) { 890 /* should be exclusive */ 891 /* temporary hack: we have still no proper support 892 * for the direct AC3 stream... 893 */ 894 formats |= SNDRV_PCM_FMTBIT_U8; 895 bps = 8; 896 } 897 if (formats == 0) { 898 dev_err(&codec->dev, 899 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n", 900 nid, val, 901 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0, 902 streams); 903 return -EIO; 904 } 905 if (formatsp) 906 *formatsp = formats; 907 if (bpsp) 908 *bpsp = bps; 909 } 910 911 return 0; 912 } 913 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm); 914 915 /** 916 * snd_hdac_is_supported_format - Check the validity of the format 917 * @codec: the codec object 918 * @nid: NID to check 919 * @format: the HD-audio format value to check 920 * 921 * Check whether the given node supports the format value. 922 * 923 * Returns true if supported, false if not. 924 */ 925 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid, 926 unsigned int format) 927 { 928 int i; 929 unsigned int val = 0, rate, stream; 930 931 val = query_pcm_param(codec, nid); 932 if (!val) 933 return false; 934 935 rate = format & 0xff00; 936 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) 937 if (rate_bits[i].hda_fmt == rate) { 938 if (val & (1 << i)) 939 break; 940 return false; 941 } 942 if (i >= AC_PAR_PCM_RATE_BITS) 943 return false; 944 945 stream = query_stream_param(codec, nid); 946 if (!stream) 947 return false; 948 949 if (stream & AC_SUPFMT_PCM) { 950 switch (format & 0xf0) { 951 case 0x00: 952 if (!(val & AC_SUPPCM_BITS_8)) 953 return false; 954 break; 955 case 0x10: 956 if (!(val & AC_SUPPCM_BITS_16)) 957 return false; 958 break; 959 case 0x20: 960 if (!(val & AC_SUPPCM_BITS_20)) 961 return false; 962 break; 963 case 0x30: 964 if (!(val & AC_SUPPCM_BITS_24)) 965 return false; 966 break; 967 case 0x40: 968 if (!(val & AC_SUPPCM_BITS_32)) 969 return false; 970 break; 971 default: 972 return false; 973 } 974 } else { 975 /* FIXME: check for float32 and AC3? */ 976 } 977 978 return true; 979 } 980 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format); 981 982 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid, 983 int flags, unsigned int verb, unsigned int parm) 984 { 985 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm); 986 unsigned int res; 987 988 if (snd_hdac_exec_verb(hdac, cmd, flags, &res)) 989 return -1; 990 991 return res; 992 } 993 994 static int codec_write(struct hdac_device *hdac, hda_nid_t nid, 995 int flags, unsigned int verb, unsigned int parm) 996 { 997 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm); 998 999 return snd_hdac_exec_verb(hdac, cmd, flags, NULL); 1000 } 1001 1002 /** 1003 * snd_hdac_codec_read - send a command and get the response 1004 * @hdac: the HDAC device 1005 * @nid: NID to send the command 1006 * @flags: optional bit flags 1007 * @verb: the verb to send 1008 * @parm: the parameter for the verb 1009 * 1010 * Send a single command and read the corresponding response. 1011 * 1012 * Returns the obtained response value, or -1 for an error. 1013 */ 1014 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid, 1015 int flags, unsigned int verb, unsigned int parm) 1016 { 1017 return codec_read(hdac, nid, flags, verb, parm); 1018 } 1019 EXPORT_SYMBOL_GPL(snd_hdac_codec_read); 1020 1021 /** 1022 * snd_hdac_codec_write - send a single command without waiting for response 1023 * @hdac: the HDAC device 1024 * @nid: NID to send the command 1025 * @flags: optional bit flags 1026 * @verb: the verb to send 1027 * @parm: the parameter for the verb 1028 * 1029 * Send a single command without waiting for response. 1030 * 1031 * Returns 0 if successful, or a negative error code. 1032 */ 1033 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid, 1034 int flags, unsigned int verb, unsigned int parm) 1035 { 1036 return codec_write(hdac, nid, flags, verb, parm); 1037 } 1038 EXPORT_SYMBOL_GPL(snd_hdac_codec_write); 1039 1040 /** 1041 * snd_hdac_check_power_state - check whether the actual power state matches 1042 * with the target state 1043 * 1044 * @hdac: the HDAC device 1045 * @nid: NID to send the command 1046 * @target_state: target state to check for 1047 * 1048 * Return true if state matches, false if not 1049 */ 1050 bool snd_hdac_check_power_state(struct hdac_device *hdac, 1051 hda_nid_t nid, unsigned int target_state) 1052 { 1053 unsigned int state = codec_read(hdac, nid, 0, 1054 AC_VERB_GET_POWER_STATE, 0); 1055 1056 if (state & AC_PWRST_ERROR) 1057 return true; 1058 state = (state >> 4) & 0x0f; 1059 return (state == target_state); 1060 } 1061 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state); 1062 /** 1063 * snd_hdac_sync_power_state - wait until actual power state matches 1064 * with the target state 1065 * 1066 * @hdac: the HDAC device 1067 * @nid: NID to send the command 1068 * @target_state: target state to check for 1069 * 1070 * Return power state or PS_ERROR if codec rejects GET verb. 1071 */ 1072 unsigned int snd_hdac_sync_power_state(struct hdac_device *codec, 1073 hda_nid_t nid, unsigned int power_state) 1074 { 1075 unsigned long end_time = jiffies + msecs_to_jiffies(500); 1076 unsigned int state, actual_state, count; 1077 1078 for (count = 0; count < 500; count++) { 1079 state = snd_hdac_codec_read(codec, nid, 0, 1080 AC_VERB_GET_POWER_STATE, 0); 1081 if (state & AC_PWRST_ERROR) { 1082 msleep(20); 1083 break; 1084 } 1085 actual_state = (state >> 4) & 0x0f; 1086 if (actual_state == power_state) 1087 break; 1088 if (time_after_eq(jiffies, end_time)) 1089 break; 1090 /* wait until the codec reachs to the target state */ 1091 msleep(1); 1092 } 1093 return state; 1094 } 1095 EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state); 1096