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