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