1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * HD-audio codec core device 4 */ 5 6 #include <linux/init.h> 7 #include <linux/delay.h> 8 #include <linux/device.h> 9 #include <linux/slab.h> 10 #include <linux/module.h> 11 #include <linux/export.h> 12 #include <linux/pm_runtime.h> 13 #include <sound/hdaudio.h> 14 #include <sound/hda_regmap.h> 15 #include <sound/pcm.h> 16 #include "local.h" 17 18 static void setup_fg_nodes(struct hdac_device *codec); 19 static int get_codec_vendor_name(struct hdac_device *codec); 20 21 static void default_release(struct device *dev) 22 { 23 snd_hdac_device_exit(container_of(dev, struct hdac_device, dev)); 24 } 25 26 /** 27 * snd_hdac_device_init - initialize the HD-audio codec base device 28 * @codec: device to initialize 29 * @bus: but to attach 30 * @name: device name string 31 * @addr: codec address 32 * 33 * Returns zero for success or a negative error code. 34 * 35 * This function increments the runtime PM counter and marks it active. 36 * The caller needs to turn it off appropriately later. 37 * 38 * The caller needs to set the device's release op properly by itself. 39 */ 40 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus, 41 const char *name, unsigned int addr) 42 { 43 struct device *dev; 44 hda_nid_t fg; 45 int err; 46 47 dev = &codec->dev; 48 device_initialize(dev); 49 dev->parent = bus->dev; 50 dev->bus = &snd_hda_bus_type; 51 dev->release = default_release; 52 dev->groups = hdac_dev_attr_groups; 53 dev_set_name(dev, "%s", name); 54 device_enable_async_suspend(dev); 55 56 codec->bus = bus; 57 codec->addr = addr; 58 codec->type = HDA_DEV_CORE; 59 mutex_init(&codec->widget_lock); 60 mutex_init(&codec->regmap_lock); 61 pm_runtime_set_active(&codec->dev); 62 pm_runtime_get_noresume(&codec->dev); 63 atomic_set(&codec->in_pm, 0); 64 65 err = snd_hdac_bus_add_device(bus, codec); 66 if (err < 0) 67 goto error; 68 69 /* fill parameters */ 70 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 71 AC_PAR_VENDOR_ID); 72 if (codec->vendor_id == -1) { 73 /* read again, hopefully the access method was corrected 74 * in the last read... 75 */ 76 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 77 AC_PAR_VENDOR_ID); 78 } 79 80 codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 81 AC_PAR_SUBSYSTEM_ID); 82 codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, 83 AC_PAR_REV_ID); 84 85 setup_fg_nodes(codec); 86 if (!codec->afg && !codec->mfg) { 87 dev_err(dev, "no AFG or MFG node found\n"); 88 err = -ENODEV; 89 goto error; 90 } 91 92 fg = codec->afg ? codec->afg : codec->mfg; 93 94 err = snd_hdac_refresh_widgets(codec); 95 if (err < 0) 96 goto error; 97 98 codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE); 99 /* reread ssid if not set by parameter */ 100 if (codec->subsystem_id == -1 || codec->subsystem_id == 0) 101 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0, 102 &codec->subsystem_id); 103 104 err = get_codec_vendor_name(codec); 105 if (err < 0) 106 goto error; 107 108 codec->chip_name = kasprintf(GFP_KERNEL, "ID %x", 109 codec->vendor_id & 0xffff); 110 if (!codec->chip_name) { 111 err = -ENOMEM; 112 goto error; 113 } 114 115 return 0; 116 117 error: 118 put_device(&codec->dev); 119 return err; 120 } 121 EXPORT_SYMBOL_GPL(snd_hdac_device_init); 122 123 /** 124 * snd_hdac_device_exit - clean up the HD-audio codec base device 125 * @codec: device to clean up 126 */ 127 void snd_hdac_device_exit(struct hdac_device *codec) 128 { 129 pm_runtime_put_noidle(&codec->dev); 130 snd_hdac_bus_remove_device(codec->bus, codec); 131 kfree(codec->vendor_name); 132 kfree(codec->chip_name); 133 } 134 EXPORT_SYMBOL_GPL(snd_hdac_device_exit); 135 136 /** 137 * snd_hdac_device_register - register the hd-audio codec base device 138 * @codec: the device to register 139 */ 140 int snd_hdac_device_register(struct hdac_device *codec) 141 { 142 int err; 143 144 err = device_add(&codec->dev); 145 if (err < 0) 146 return err; 147 mutex_lock(&codec->widget_lock); 148 err = hda_widget_sysfs_init(codec); 149 mutex_unlock(&codec->widget_lock); 150 if (err < 0) { 151 device_del(&codec->dev); 152 return err; 153 } 154 155 return 0; 156 } 157 EXPORT_SYMBOL_GPL(snd_hdac_device_register); 158 159 /** 160 * snd_hdac_device_unregister - unregister the hd-audio codec base device 161 * @codec: the device to unregister 162 */ 163 void snd_hdac_device_unregister(struct hdac_device *codec) 164 { 165 if (device_is_registered(&codec->dev)) { 166 mutex_lock(&codec->widget_lock); 167 hda_widget_sysfs_exit(codec); 168 mutex_unlock(&codec->widget_lock); 169 device_del(&codec->dev); 170 snd_hdac_bus_remove_device(codec->bus, codec); 171 } 172 } 173 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister); 174 175 /** 176 * snd_hdac_device_set_chip_name - set/update the codec name 177 * @codec: the HDAC device 178 * @name: name string to set 179 * 180 * Returns 0 if the name is set or updated, or a negative error code. 181 */ 182 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name) 183 { 184 char *newname; 185 186 if (!name) 187 return 0; 188 newname = kstrdup(name, GFP_KERNEL); 189 if (!newname) 190 return -ENOMEM; 191 kfree(codec->chip_name); 192 codec->chip_name = newname; 193 return 0; 194 } 195 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name); 196 197 /** 198 * snd_hdac_codec_modalias - give the module alias name 199 * @codec: HDAC device 200 * @buf: string buffer to store 201 * @size: string buffer size 202 * 203 * Returns the size of string, like snprintf(), or a negative error code. 204 */ 205 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size) 206 { 207 return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n", 208 codec->vendor_id, codec->revision_id, codec->type); 209 } 210 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias); 211 212 /** 213 * snd_hdac_make_cmd - compose a 32bit command word to be sent to the 214 * HD-audio controller 215 * @codec: the codec object 216 * @nid: NID to encode 217 * @verb: verb to encode 218 * @parm: parameter to encode 219 * 220 * Return an encoded command verb or -1 for error. 221 */ 222 static unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid, 223 unsigned int verb, unsigned int parm) 224 { 225 u32 val, addr; 226 227 addr = codec->addr; 228 if ((addr & ~0xf) || (nid & ~0x7f) || 229 (verb & ~0xfff) || (parm & ~0xffff)) { 230 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n", 231 addr, nid, verb, parm); 232 return -1; 233 } 234 235 val = addr << 28; 236 val |= (u32)nid << 20; 237 val |= verb << 8; 238 val |= parm; 239 return val; 240 } 241 242 /** 243 * snd_hdac_exec_verb - execute an encoded verb 244 * @codec: the codec object 245 * @cmd: encoded verb to execute 246 * @flags: optional flags, pass zero for default 247 * @res: the pointer to store the result, NULL if running async 248 * 249 * Returns zero if successful, or a negative error code. 250 * 251 * This calls the exec_verb op when set in hdac_codec. If not, 252 * call the default snd_hdac_bus_exec_verb(). 253 */ 254 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd, 255 unsigned int flags, unsigned int *res) 256 { 257 if (codec->exec_verb) 258 return codec->exec_verb(codec, cmd, flags, res); 259 return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res); 260 } 261 262 263 /** 264 * snd_hdac_read - execute a verb 265 * @codec: the codec object 266 * @nid: NID to execute a verb 267 * @verb: verb to execute 268 * @parm: parameter for a verb 269 * @res: the pointer to store the result, NULL if running async 270 * 271 * Returns zero if successful, or a negative error code. 272 */ 273 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid, 274 unsigned int verb, unsigned int parm, unsigned int *res) 275 { 276 unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm); 277 278 return snd_hdac_exec_verb(codec, cmd, 0, res); 279 } 280 EXPORT_SYMBOL_GPL(snd_hdac_read); 281 282 /** 283 * _snd_hdac_read_parm - read a parmeter 284 * @codec: the codec object 285 * @nid: NID to read a parameter 286 * @parm: parameter to read 287 * @res: pointer to store the read value 288 * 289 * This function returns zero or an error unlike snd_hdac_read_parm(). 290 */ 291 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm, 292 unsigned int *res) 293 { 294 unsigned int cmd; 295 296 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; 297 return snd_hdac_regmap_read_raw(codec, cmd, res); 298 } 299 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm); 300 301 /** 302 * snd_hdac_read_parm_uncached - read a codec parameter without caching 303 * @codec: the codec object 304 * @nid: NID to read a parameter 305 * @parm: parameter to read 306 * 307 * Returns -1 for error. If you need to distinguish the error more 308 * strictly, use snd_hdac_read() directly. 309 */ 310 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid, 311 int parm) 312 { 313 unsigned int cmd, val; 314 315 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; 316 if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0) 317 return -1; 318 return val; 319 } 320 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached); 321 322 /** 323 * snd_hdac_override_parm - override read-only parameters 324 * @codec: the codec object 325 * @nid: NID for the parameter 326 * @parm: the parameter to change 327 * @val: the parameter value to overwrite 328 */ 329 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid, 330 unsigned int parm, unsigned int val) 331 { 332 unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm; 333 int err; 334 335 if (!codec->regmap) 336 return -EINVAL; 337 338 codec->caps_overwriting = true; 339 err = snd_hdac_regmap_write_raw(codec, verb, val); 340 codec->caps_overwriting = false; 341 return err; 342 } 343 EXPORT_SYMBOL_GPL(snd_hdac_override_parm); 344 345 /** 346 * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes 347 * @codec: the codec object 348 * @nid: NID to inspect 349 * @start_id: the pointer to store the starting NID 350 * 351 * Returns the number of subtree nodes or zero if not found. 352 * This function reads parameters always without caching. 353 */ 354 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid, 355 hda_nid_t *start_id) 356 { 357 unsigned int parm; 358 359 parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT); 360 if (parm == -1) { 361 *start_id = 0; 362 return 0; 363 } 364 *start_id = (parm >> 16) & 0x7fff; 365 return (int)(parm & 0x7fff); 366 } 367 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes); 368 369 /* 370 * look for an AFG and MFG nodes 371 */ 372 static void setup_fg_nodes(struct hdac_device *codec) 373 { 374 int i, total_nodes, function_id; 375 hda_nid_t nid; 376 377 total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid); 378 for (i = 0; i < total_nodes; i++, nid++) { 379 function_id = snd_hdac_read_parm(codec, nid, 380 AC_PAR_FUNCTION_TYPE); 381 switch (function_id & 0xff) { 382 case AC_GRP_AUDIO_FUNCTION: 383 codec->afg = nid; 384 codec->afg_function_id = function_id & 0xff; 385 codec->afg_unsol = (function_id >> 8) & 1; 386 break; 387 case AC_GRP_MODEM_FUNCTION: 388 codec->mfg = nid; 389 codec->mfg_function_id = function_id & 0xff; 390 codec->mfg_unsol = (function_id >> 8) & 1; 391 break; 392 default: 393 break; 394 } 395 } 396 } 397 398 /** 399 * snd_hdac_refresh_widgets - Reset the widget start/end nodes 400 * @codec: the codec object 401 */ 402 int snd_hdac_refresh_widgets(struct hdac_device *codec) 403 { 404 hda_nid_t start_nid; 405 int nums, err = 0; 406 407 /* 408 * Serialize against multiple threads trying to update the sysfs 409 * widgets array. 410 */ 411 mutex_lock(&codec->widget_lock); 412 nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid); 413 if (!start_nid || nums <= 0 || nums >= 0xff) { 414 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n", 415 codec->afg); 416 err = -EINVAL; 417 goto unlock; 418 } 419 420 err = hda_widget_sysfs_reinit(codec, start_nid, nums); 421 if (err < 0) 422 goto unlock; 423 424 codec->num_nodes = nums; 425 codec->start_nid = start_nid; 426 codec->end_nid = start_nid + nums; 427 unlock: 428 mutex_unlock(&codec->widget_lock); 429 return err; 430 } 431 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets); 432 433 /* return CONNLIST_LEN parameter of the given widget */ 434 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid) 435 { 436 unsigned int wcaps = get_wcaps(codec, nid); 437 unsigned int parm; 438 439 if (!(wcaps & AC_WCAP_CONN_LIST) && 440 get_wcaps_type(wcaps) != AC_WID_VOL_KNB) 441 return 0; 442 443 parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN); 444 if (parm == -1) 445 parm = 0; 446 return parm; 447 } 448 449 /** 450 * snd_hdac_get_connections - get a widget connection list 451 * @codec: the codec object 452 * @nid: NID 453 * @conn_list: the array to store the results, can be NULL 454 * @max_conns: the max size of the given array 455 * 456 * Returns the number of connected widgets, zero for no connection, or a 457 * negative error code. When the number of elements don't fit with the 458 * given array size, it returns -ENOSPC. 459 * 460 * When @conn_list is NULL, it just checks the number of connections. 461 */ 462 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid, 463 hda_nid_t *conn_list, int max_conns) 464 { 465 unsigned int parm; 466 int i, conn_len, conns, err; 467 unsigned int shift, num_elems, mask; 468 hda_nid_t prev_nid; 469 int null_count = 0; 470 471 parm = get_num_conns(codec, nid); 472 if (!parm) 473 return 0; 474 475 if (parm & AC_CLIST_LONG) { 476 /* long form */ 477 shift = 16; 478 num_elems = 2; 479 } else { 480 /* short form */ 481 shift = 8; 482 num_elems = 4; 483 } 484 conn_len = parm & AC_CLIST_LENGTH; 485 mask = (1 << (shift-1)) - 1; 486 487 if (!conn_len) 488 return 0; /* no connection */ 489 490 if (conn_len == 1) { 491 /* single connection */ 492 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0, 493 &parm); 494 if (err < 0) 495 return err; 496 if (conn_list) 497 conn_list[0] = parm & mask; 498 return 1; 499 } 500 501 /* multi connection */ 502 conns = 0; 503 prev_nid = 0; 504 for (i = 0; i < conn_len; i++) { 505 int range_val; 506 hda_nid_t val, n; 507 508 if (i % num_elems == 0) { 509 err = snd_hdac_read(codec, nid, 510 AC_VERB_GET_CONNECT_LIST, i, 511 &parm); 512 if (err < 0) 513 return -EIO; 514 } 515 range_val = !!(parm & (1 << (shift-1))); /* ranges */ 516 val = parm & mask; 517 if (val == 0 && null_count++) { /* no second chance */ 518 dev_dbg(&codec->dev, 519 "invalid CONNECT_LIST verb %x[%i]:%x\n", 520 nid, i, parm); 521 return 0; 522 } 523 parm >>= shift; 524 if (range_val) { 525 /* ranges between the previous and this one */ 526 if (!prev_nid || prev_nid >= val) { 527 dev_warn(&codec->dev, 528 "invalid dep_range_val %x:%x\n", 529 prev_nid, val); 530 continue; 531 } 532 for (n = prev_nid + 1; n <= val; n++) { 533 if (conn_list) { 534 if (conns >= max_conns) 535 return -ENOSPC; 536 conn_list[conns] = n; 537 } 538 conns++; 539 } 540 } else { 541 if (conn_list) { 542 if (conns >= max_conns) 543 return -ENOSPC; 544 conn_list[conns] = val; 545 } 546 conns++; 547 } 548 prev_nid = val; 549 } 550 return conns; 551 } 552 EXPORT_SYMBOL_GPL(snd_hdac_get_connections); 553 554 #ifdef CONFIG_PM 555 /** 556 * snd_hdac_power_up - power up the codec 557 * @codec: the codec object 558 * 559 * This function calls the runtime PM helper to power up the given codec. 560 * Unlike snd_hdac_power_up_pm(), you should call this only for the code 561 * path that isn't included in PM path. Otherwise it gets stuck. 562 * 563 * Returns zero if successful, or a negative error code. 564 */ 565 int snd_hdac_power_up(struct hdac_device *codec) 566 { 567 return pm_runtime_get_sync(&codec->dev); 568 } 569 EXPORT_SYMBOL_GPL(snd_hdac_power_up); 570 571 /** 572 * snd_hdac_power_down - power down the codec 573 * @codec: the codec object 574 * 575 * Returns zero if successful, or a negative error code. 576 */ 577 int snd_hdac_power_down(struct hdac_device *codec) 578 { 579 struct device *dev = &codec->dev; 580 581 pm_runtime_mark_last_busy(dev); 582 return pm_runtime_put_autosuspend(dev); 583 } 584 EXPORT_SYMBOL_GPL(snd_hdac_power_down); 585 586 /** 587 * snd_hdac_power_up_pm - power up the codec 588 * @codec: the codec object 589 * 590 * This function can be called in a recursive code path like init code 591 * which may be called by PM suspend/resume again. OTOH, if a power-up 592 * call must wake up the sleeper (e.g. in a kctl callback), use 593 * snd_hdac_power_up() instead. 594 * 595 * Returns zero if successful, or a negative error code. 596 */ 597 int snd_hdac_power_up_pm(struct hdac_device *codec) 598 { 599 if (!atomic_inc_not_zero(&codec->in_pm)) 600 return snd_hdac_power_up(codec); 601 return 0; 602 } 603 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm); 604 605 /* like snd_hdac_power_up_pm(), but only increment the pm count when 606 * already powered up. Returns -1 if not powered up, 1 if incremented 607 * or 0 if unchanged. Only used in hdac_regmap.c 608 */ 609 int snd_hdac_keep_power_up(struct hdac_device *codec) 610 { 611 if (!atomic_inc_not_zero(&codec->in_pm)) { 612 int ret = pm_runtime_get_if_in_use(&codec->dev); 613 if (!ret) 614 return -1; 615 if (ret < 0) 616 return 0; 617 } 618 return 1; 619 } 620 621 /** 622 * snd_hdac_power_down_pm - power down the codec 623 * @codec: the codec object 624 * 625 * Like snd_hdac_power_up_pm(), this function is used in a recursive 626 * code path like init code which may be called by PM suspend/resume again. 627 * 628 * Returns zero if successful, or a negative error code. 629 */ 630 int snd_hdac_power_down_pm(struct hdac_device *codec) 631 { 632 if (atomic_dec_if_positive(&codec->in_pm) < 0) 633 return snd_hdac_power_down(codec); 634 return 0; 635 } 636 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm); 637 #endif 638 639 /* codec vendor labels */ 640 struct hda_vendor_id { 641 unsigned int id; 642 const char *name; 643 }; 644 645 static const struct hda_vendor_id hda_vendor_ids[] = { 646 { 0x1002, "ATI" }, 647 { 0x1013, "Cirrus Logic" }, 648 { 0x1057, "Motorola" }, 649 { 0x1095, "Silicon Image" }, 650 { 0x10de, "Nvidia" }, 651 { 0x10ec, "Realtek" }, 652 { 0x1102, "Creative" }, 653 { 0x1106, "VIA" }, 654 { 0x111d, "IDT" }, 655 { 0x11c1, "LSI" }, 656 { 0x11d4, "Analog Devices" }, 657 { 0x13f6, "C-Media" }, 658 { 0x14f1, "Conexant" }, 659 { 0x17e8, "Chrontel" }, 660 { 0x1854, "LG" }, 661 { 0x1aec, "Wolfson Microelectronics" }, 662 { 0x1af4, "QEMU" }, 663 { 0x434d, "C-Media" }, 664 { 0x8086, "Intel" }, 665 { 0x8384, "SigmaTel" }, 666 {} /* terminator */ 667 }; 668 669 /* store the codec vendor name */ 670 static int get_codec_vendor_name(struct hdac_device *codec) 671 { 672 const struct hda_vendor_id *c; 673 u16 vendor_id = codec->vendor_id >> 16; 674 675 for (c = hda_vendor_ids; c->id; c++) { 676 if (c->id == vendor_id) { 677 codec->vendor_name = kstrdup(c->name, GFP_KERNEL); 678 return codec->vendor_name ? 0 : -ENOMEM; 679 } 680 } 681 682 codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id); 683 return codec->vendor_name ? 0 : -ENOMEM; 684 } 685 686 /* 687 * stream formats 688 */ 689 struct hda_rate_tbl { 690 unsigned int hz; 691 unsigned int alsa_bits; 692 unsigned int hda_fmt; 693 }; 694 695 /* rate = base * mult / div */ 696 #define HDA_RATE(base, mult, div) \ 697 (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \ 698 (((div) - 1) << AC_FMT_DIV_SHIFT)) 699 700 static const struct hda_rate_tbl rate_bits[] = { 701 /* rate in Hz, ALSA rate bitmask, HDA format value */ 702 703 /* autodetected value used in snd_hda_query_supported_pcm */ 704 { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) }, 705 { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) }, 706 { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) }, 707 { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) }, 708 { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) }, 709 { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) }, 710 { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) }, 711 { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) }, 712 { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) }, 713 { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) }, 714 { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) }, 715 #define AC_PAR_PCM_RATE_BITS 11 716 /* up to bits 10, 384kHZ isn't supported properly */ 717 718 /* not autodetected value */ 719 { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) }, 720 721 { 0 } /* terminator */ 722 }; 723 724 /** 725 * snd_hdac_calc_stream_format - calculate the format bitset 726 * @rate: the sample rate 727 * @channels: the number of channels 728 * @format: the PCM format (SNDRV_PCM_FORMAT_XXX) 729 * @maxbps: the max. bps 730 * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant) 731 * 732 * Calculate the format bitset from the given rate, channels and th PCM format. 733 * 734 * Return zero if invalid. 735 */ 736 unsigned int snd_hdac_calc_stream_format(unsigned int rate, 737 unsigned int channels, 738 snd_pcm_format_t format, 739 unsigned int maxbps, 740 unsigned short spdif_ctls) 741 { 742 int i; 743 unsigned int val = 0; 744 745 for (i = 0; rate_bits[i].hz; i++) 746 if (rate_bits[i].hz == rate) { 747 val = rate_bits[i].hda_fmt; 748 break; 749 } 750 if (!rate_bits[i].hz) 751 return 0; 752 753 if (channels == 0 || channels > 8) 754 return 0; 755 val |= channels - 1; 756 757 switch (snd_pcm_format_width(format)) { 758 case 8: 759 val |= AC_FMT_BITS_8; 760 break; 761 case 16: 762 val |= AC_FMT_BITS_16; 763 break; 764 case 20: 765 case 24: 766 case 32: 767 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE) 768 val |= AC_FMT_BITS_32; 769 else if (maxbps >= 24) 770 val |= AC_FMT_BITS_24; 771 else 772 val |= AC_FMT_BITS_20; 773 break; 774 default: 775 return 0; 776 } 777 778 if (spdif_ctls & AC_DIG1_NONAUDIO) 779 val |= AC_FMT_TYPE_NON_PCM; 780 781 return val; 782 } 783 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format); 784 785 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid) 786 { 787 unsigned int val = 0; 788 789 if (nid != codec->afg && 790 (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD)) 791 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM); 792 if (!val || val == -1) 793 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM); 794 if (!val || val == -1) 795 return 0; 796 return val; 797 } 798 799 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid) 800 { 801 unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM); 802 803 if (!streams || streams == -1) 804 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM); 805 if (!streams || streams == -1) 806 return 0; 807 return streams; 808 } 809 810 /** 811 * snd_hdac_query_supported_pcm - query the supported PCM rates and formats 812 * @codec: the codec object 813 * @nid: NID to query 814 * @ratesp: the pointer to store the detected rate bitflags 815 * @formatsp: the pointer to store the detected formats 816 * @bpsp: the pointer to store the detected format widths 817 * 818 * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp 819 * or @bsps argument is ignored. 820 * 821 * Returns 0 if successful, otherwise a negative error code. 822 */ 823 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid, 824 u32 *ratesp, u64 *formatsp, unsigned int *bpsp) 825 { 826 unsigned int i, val, wcaps; 827 828 wcaps = get_wcaps(codec, nid); 829 val = query_pcm_param(codec, nid); 830 831 if (ratesp) { 832 u32 rates = 0; 833 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) { 834 if (val & (1 << i)) 835 rates |= rate_bits[i].alsa_bits; 836 } 837 if (rates == 0) { 838 dev_err(&codec->dev, 839 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n", 840 nid, val, 841 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0); 842 return -EIO; 843 } 844 *ratesp = rates; 845 } 846 847 if (formatsp || bpsp) { 848 u64 formats = 0; 849 unsigned int streams, bps; 850 851 streams = query_stream_param(codec, nid); 852 if (!streams) 853 return -EIO; 854 855 bps = 0; 856 if (streams & AC_SUPFMT_PCM) { 857 if (val & AC_SUPPCM_BITS_8) { 858 formats |= SNDRV_PCM_FMTBIT_U8; 859 bps = 8; 860 } 861 if (val & AC_SUPPCM_BITS_16) { 862 formats |= SNDRV_PCM_FMTBIT_S16_LE; 863 bps = 16; 864 } 865 if (wcaps & AC_WCAP_DIGITAL) { 866 if (val & AC_SUPPCM_BITS_32) 867 formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE; 868 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24)) 869 formats |= SNDRV_PCM_FMTBIT_S32_LE; 870 if (val & AC_SUPPCM_BITS_24) 871 bps = 24; 872 else if (val & AC_SUPPCM_BITS_20) 873 bps = 20; 874 } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24| 875 AC_SUPPCM_BITS_32)) { 876 formats |= SNDRV_PCM_FMTBIT_S32_LE; 877 if (val & AC_SUPPCM_BITS_32) 878 bps = 32; 879 else if (val & AC_SUPPCM_BITS_24) 880 bps = 24; 881 else if (val & AC_SUPPCM_BITS_20) 882 bps = 20; 883 } 884 } 885 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */ 886 if (streams & AC_SUPFMT_FLOAT32) { 887 formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; 888 if (!bps) 889 bps = 32; 890 } 891 #endif 892 if (streams == AC_SUPFMT_AC3) { 893 /* should be exclusive */ 894 /* temporary hack: we have still no proper support 895 * for the direct AC3 stream... 896 */ 897 formats |= SNDRV_PCM_FMTBIT_U8; 898 bps = 8; 899 } 900 if (formats == 0) { 901 dev_err(&codec->dev, 902 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n", 903 nid, val, 904 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0, 905 streams); 906 return -EIO; 907 } 908 if (formatsp) 909 *formatsp = formats; 910 if (bpsp) 911 *bpsp = bps; 912 } 913 914 return 0; 915 } 916 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm); 917 918 /** 919 * snd_hdac_is_supported_format - Check the validity of the format 920 * @codec: the codec object 921 * @nid: NID to check 922 * @format: the HD-audio format value to check 923 * 924 * Check whether the given node supports the format value. 925 * 926 * Returns true if supported, false if not. 927 */ 928 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid, 929 unsigned int format) 930 { 931 int i; 932 unsigned int val = 0, rate, stream; 933 934 val = query_pcm_param(codec, nid); 935 if (!val) 936 return false; 937 938 rate = format & 0xff00; 939 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) 940 if (rate_bits[i].hda_fmt == rate) { 941 if (val & (1 << i)) 942 break; 943 return false; 944 } 945 if (i >= AC_PAR_PCM_RATE_BITS) 946 return false; 947 948 stream = query_stream_param(codec, nid); 949 if (!stream) 950 return false; 951 952 if (stream & AC_SUPFMT_PCM) { 953 switch (format & 0xf0) { 954 case 0x00: 955 if (!(val & AC_SUPPCM_BITS_8)) 956 return false; 957 break; 958 case 0x10: 959 if (!(val & AC_SUPPCM_BITS_16)) 960 return false; 961 break; 962 case 0x20: 963 if (!(val & AC_SUPPCM_BITS_20)) 964 return false; 965 break; 966 case 0x30: 967 if (!(val & AC_SUPPCM_BITS_24)) 968 return false; 969 break; 970 case 0x40: 971 if (!(val & AC_SUPPCM_BITS_32)) 972 return false; 973 break; 974 default: 975 return false; 976 } 977 } else { 978 /* FIXME: check for float32 and AC3? */ 979 } 980 981 return true; 982 } 983 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format); 984 985 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid, 986 int flags, unsigned int verb, unsigned int parm) 987 { 988 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm); 989 unsigned int res; 990 991 if (snd_hdac_exec_verb(hdac, cmd, flags, &res)) 992 return -1; 993 994 return res; 995 } 996 997 static int codec_write(struct hdac_device *hdac, hda_nid_t nid, 998 int flags, unsigned int verb, unsigned int parm) 999 { 1000 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm); 1001 1002 return snd_hdac_exec_verb(hdac, cmd, flags, NULL); 1003 } 1004 1005 /** 1006 * snd_hdac_codec_read - send a command and get the response 1007 * @hdac: the HDAC device 1008 * @nid: NID to send the command 1009 * @flags: optional bit flags 1010 * @verb: the verb to send 1011 * @parm: the parameter for the verb 1012 * 1013 * Send a single command and read the corresponding response. 1014 * 1015 * Returns the obtained response value, or -1 for an error. 1016 */ 1017 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid, 1018 int flags, unsigned int verb, unsigned int parm) 1019 { 1020 return codec_read(hdac, nid, flags, verb, parm); 1021 } 1022 EXPORT_SYMBOL_GPL(snd_hdac_codec_read); 1023 1024 /** 1025 * snd_hdac_codec_write - send a single command without waiting for response 1026 * @hdac: the HDAC device 1027 * @nid: NID to send the command 1028 * @flags: optional bit flags 1029 * @verb: the verb to send 1030 * @parm: the parameter for the verb 1031 * 1032 * Send a single command without waiting for response. 1033 * 1034 * Returns 0 if successful, or a negative error code. 1035 */ 1036 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid, 1037 int flags, unsigned int verb, unsigned int parm) 1038 { 1039 return codec_write(hdac, nid, flags, verb, parm); 1040 } 1041 EXPORT_SYMBOL_GPL(snd_hdac_codec_write); 1042 1043 /** 1044 * snd_hdac_check_power_state - check whether the actual power state matches 1045 * with the target state 1046 * 1047 * @hdac: the HDAC device 1048 * @nid: NID to send the command 1049 * @target_state: target state to check for 1050 * 1051 * Return true if state matches, false if not 1052 */ 1053 bool snd_hdac_check_power_state(struct hdac_device *hdac, 1054 hda_nid_t nid, unsigned int target_state) 1055 { 1056 unsigned int state = codec_read(hdac, nid, 0, 1057 AC_VERB_GET_POWER_STATE, 0); 1058 1059 if (state & AC_PWRST_ERROR) 1060 return true; 1061 state = (state >> 4) & 0x0f; 1062 return (state == target_state); 1063 } 1064 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state); 1065 /** 1066 * snd_hdac_sync_power_state - wait until actual power state matches 1067 * with the target state 1068 * 1069 * @codec: the HDAC device 1070 * @nid: NID to send the command 1071 * @power_state: target power state to wait for 1072 * 1073 * Return power state or PS_ERROR if codec rejects GET verb. 1074 */ 1075 unsigned int snd_hdac_sync_power_state(struct hdac_device *codec, 1076 hda_nid_t nid, unsigned int power_state) 1077 { 1078 unsigned long end_time = jiffies + msecs_to_jiffies(500); 1079 unsigned int state, actual_state, count; 1080 1081 for (count = 0; count < 500; count++) { 1082 state = snd_hdac_codec_read(codec, nid, 0, 1083 AC_VERB_GET_POWER_STATE, 0); 1084 if (state & AC_PWRST_ERROR) { 1085 msleep(20); 1086 break; 1087 } 1088 actual_state = (state >> 4) & 0x0f; 1089 if (actual_state == power_state) 1090 break; 1091 if (time_after_eq(jiffies, end_time)) 1092 break; 1093 /* wait until the codec reachs to the target state */ 1094 msleep(1); 1095 } 1096 return state; 1097 } 1098 EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state); 1099