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