1 /* 2 * HWDEP Interface for HD-audio codec 3 * 4 * Copyright (c) 2007 Takashi Iwai <tiwai@suse.de> 5 * 6 * This driver is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This driver is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 21 #include <linux/init.h> 22 #include <linux/slab.h> 23 #include <linux/pci.h> 24 #include <linux/compat.h> 25 #include <linux/mutex.h> 26 #include <linux/ctype.h> 27 #include <linux/string.h> 28 #include <linux/firmware.h> 29 #include <linux/export.h> 30 #include <sound/core.h> 31 #include "hda_codec.h" 32 #include "hda_local.h" 33 #include <sound/hda_hwdep.h> 34 #include <sound/minors.h> 35 36 /* hint string pair */ 37 struct hda_hint { 38 const char *key; 39 const char *val; /* contained in the same alloc as key */ 40 }; 41 42 /* 43 * write/read an out-of-bound verb 44 */ 45 static int verb_write_ioctl(struct hda_codec *codec, 46 struct hda_verb_ioctl __user *arg) 47 { 48 u32 verb, res; 49 50 if (get_user(verb, &arg->verb)) 51 return -EFAULT; 52 res = snd_hda_codec_read(codec, verb >> 24, 0, 53 (verb >> 8) & 0xffff, verb & 0xff); 54 if (put_user(res, &arg->res)) 55 return -EFAULT; 56 return 0; 57 } 58 59 static int get_wcap_ioctl(struct hda_codec *codec, 60 struct hda_verb_ioctl __user *arg) 61 { 62 u32 verb, res; 63 64 if (get_user(verb, &arg->verb)) 65 return -EFAULT; 66 res = get_wcaps(codec, verb >> 24); 67 if (put_user(res, &arg->res)) 68 return -EFAULT; 69 return 0; 70 } 71 72 73 /* 74 */ 75 static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file, 76 unsigned int cmd, unsigned long arg) 77 { 78 struct hda_codec *codec = hw->private_data; 79 void __user *argp = (void __user *)arg; 80 81 switch (cmd) { 82 case HDA_IOCTL_PVERSION: 83 return put_user(HDA_HWDEP_VERSION, (int __user *)argp); 84 case HDA_IOCTL_VERB_WRITE: 85 return verb_write_ioctl(codec, argp); 86 case HDA_IOCTL_GET_WCAP: 87 return get_wcap_ioctl(codec, argp); 88 } 89 return -ENOIOCTLCMD; 90 } 91 92 #ifdef CONFIG_COMPAT 93 static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file, 94 unsigned int cmd, unsigned long arg) 95 { 96 return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg)); 97 } 98 #endif 99 100 static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file) 101 { 102 #ifndef CONFIG_SND_DEBUG_VERBOSE 103 if (!capable(CAP_SYS_RAWIO)) 104 return -EACCES; 105 #endif 106 return 0; 107 } 108 109 static void clear_hwdep_elements(struct hda_codec *codec) 110 { 111 int i; 112 113 /* clear init verbs */ 114 snd_array_free(&codec->init_verbs); 115 /* clear hints */ 116 for (i = 0; i < codec->hints.used; i++) { 117 struct hda_hint *hint = snd_array_elem(&codec->hints, i); 118 kfree(hint->key); /* we don't need to free hint->val */ 119 } 120 snd_array_free(&codec->hints); 121 snd_array_free(&codec->user_pins); 122 } 123 124 static void hwdep_free(struct snd_hwdep *hwdep) 125 { 126 clear_hwdep_elements(hwdep->private_data); 127 } 128 129 int /*__devinit*/ snd_hda_create_hwdep(struct hda_codec *codec) 130 { 131 char hwname[16]; 132 struct snd_hwdep *hwdep; 133 int err; 134 135 sprintf(hwname, "HDA Codec %d", codec->addr); 136 err = snd_hwdep_new(codec->bus->card, hwname, codec->addr, &hwdep); 137 if (err < 0) 138 return err; 139 codec->hwdep = hwdep; 140 sprintf(hwdep->name, "HDA Codec %d", codec->addr); 141 hwdep->iface = SNDRV_HWDEP_IFACE_HDA; 142 hwdep->private_data = codec; 143 hwdep->private_free = hwdep_free; 144 hwdep->exclusive = 1; 145 146 hwdep->ops.open = hda_hwdep_open; 147 hwdep->ops.ioctl = hda_hwdep_ioctl; 148 #ifdef CONFIG_COMPAT 149 hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat; 150 #endif 151 152 snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32); 153 snd_array_init(&codec->hints, sizeof(struct hda_hint), 32); 154 snd_array_init(&codec->user_pins, sizeof(struct hda_pincfg), 16); 155 156 return 0; 157 } 158 159 #ifdef CONFIG_SND_HDA_POWER_SAVE 160 static ssize_t power_on_acct_show(struct device *dev, 161 struct device_attribute *attr, 162 char *buf) 163 { 164 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 165 struct hda_codec *codec = hwdep->private_data; 166 snd_hda_update_power_acct(codec); 167 return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct)); 168 } 169 170 static ssize_t power_off_acct_show(struct device *dev, 171 struct device_attribute *attr, 172 char *buf) 173 { 174 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 175 struct hda_codec *codec = hwdep->private_data; 176 snd_hda_update_power_acct(codec); 177 return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct)); 178 } 179 180 static struct device_attribute power_attrs[] = { 181 __ATTR_RO(power_on_acct), 182 __ATTR_RO(power_off_acct), 183 }; 184 185 int snd_hda_hwdep_add_power_sysfs(struct hda_codec *codec) 186 { 187 struct snd_hwdep *hwdep = codec->hwdep; 188 int i; 189 190 for (i = 0; i < ARRAY_SIZE(power_attrs); i++) 191 snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, 192 hwdep->device, &power_attrs[i]); 193 return 0; 194 } 195 #endif /* CONFIG_SND_HDA_POWER_SAVE */ 196 197 #ifdef CONFIG_SND_HDA_RECONFIG 198 199 /* 200 * sysfs interface 201 */ 202 203 static int clear_codec(struct hda_codec *codec) 204 { 205 int err; 206 207 err = snd_hda_codec_reset(codec); 208 if (err < 0) { 209 snd_printk(KERN_ERR "The codec is being used, can't free.\n"); 210 return err; 211 } 212 clear_hwdep_elements(codec); 213 return 0; 214 } 215 216 static int reconfig_codec(struct hda_codec *codec) 217 { 218 int err; 219 220 snd_hda_power_up(codec); 221 snd_printk(KERN_INFO "hda-codec: reconfiguring\n"); 222 err = snd_hda_codec_reset(codec); 223 if (err < 0) { 224 snd_printk(KERN_ERR 225 "The codec is being used, can't reconfigure.\n"); 226 goto error; 227 } 228 err = snd_hda_codec_configure(codec); 229 if (err < 0) 230 goto error; 231 /* rebuild PCMs */ 232 err = snd_hda_codec_build_pcms(codec); 233 if (err < 0) 234 goto error; 235 /* rebuild mixers */ 236 err = snd_hda_codec_build_controls(codec); 237 if (err < 0) 238 goto error; 239 err = snd_card_register(codec->bus->card); 240 error: 241 snd_hda_power_down(codec); 242 return err; 243 } 244 245 /* 246 * allocate a string at most len chars, and remove the trailing EOL 247 */ 248 static char *kstrndup_noeol(const char *src, size_t len) 249 { 250 char *s = kstrndup(src, len, GFP_KERNEL); 251 char *p; 252 if (!s) 253 return NULL; 254 p = strchr(s, '\n'); 255 if (p) 256 *p = 0; 257 return s; 258 } 259 260 #define CODEC_INFO_SHOW(type) \ 261 static ssize_t type##_show(struct device *dev, \ 262 struct device_attribute *attr, \ 263 char *buf) \ 264 { \ 265 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ 266 struct hda_codec *codec = hwdep->private_data; \ 267 return sprintf(buf, "0x%x\n", codec->type); \ 268 } 269 270 #define CODEC_INFO_STR_SHOW(type) \ 271 static ssize_t type##_show(struct device *dev, \ 272 struct device_attribute *attr, \ 273 char *buf) \ 274 { \ 275 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ 276 struct hda_codec *codec = hwdep->private_data; \ 277 return sprintf(buf, "%s\n", \ 278 codec->type ? codec->type : ""); \ 279 } 280 281 CODEC_INFO_SHOW(vendor_id); 282 CODEC_INFO_SHOW(subsystem_id); 283 CODEC_INFO_SHOW(revision_id); 284 CODEC_INFO_SHOW(afg); 285 CODEC_INFO_SHOW(mfg); 286 CODEC_INFO_STR_SHOW(vendor_name); 287 CODEC_INFO_STR_SHOW(chip_name); 288 CODEC_INFO_STR_SHOW(modelname); 289 290 #define CODEC_INFO_STORE(type) \ 291 static ssize_t type##_store(struct device *dev, \ 292 struct device_attribute *attr, \ 293 const char *buf, size_t count) \ 294 { \ 295 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ 296 struct hda_codec *codec = hwdep->private_data; \ 297 unsigned long val; \ 298 int err = strict_strtoul(buf, 0, &val); \ 299 if (err < 0) \ 300 return err; \ 301 codec->type = val; \ 302 return count; \ 303 } 304 305 #define CODEC_INFO_STR_STORE(type) \ 306 static ssize_t type##_store(struct device *dev, \ 307 struct device_attribute *attr, \ 308 const char *buf, size_t count) \ 309 { \ 310 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ 311 struct hda_codec *codec = hwdep->private_data; \ 312 char *s = kstrndup_noeol(buf, 64); \ 313 if (!s) \ 314 return -ENOMEM; \ 315 kfree(codec->type); \ 316 codec->type = s; \ 317 return count; \ 318 } 319 320 CODEC_INFO_STORE(vendor_id); 321 CODEC_INFO_STORE(subsystem_id); 322 CODEC_INFO_STORE(revision_id); 323 CODEC_INFO_STR_STORE(vendor_name); 324 CODEC_INFO_STR_STORE(chip_name); 325 CODEC_INFO_STR_STORE(modelname); 326 327 #define CODEC_ACTION_STORE(type) \ 328 static ssize_t type##_store(struct device *dev, \ 329 struct device_attribute *attr, \ 330 const char *buf, size_t count) \ 331 { \ 332 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \ 333 struct hda_codec *codec = hwdep->private_data; \ 334 int err = 0; \ 335 if (*buf) \ 336 err = type##_codec(codec); \ 337 return err < 0 ? err : count; \ 338 } 339 340 CODEC_ACTION_STORE(reconfig); 341 CODEC_ACTION_STORE(clear); 342 343 static ssize_t init_verbs_show(struct device *dev, 344 struct device_attribute *attr, 345 char *buf) 346 { 347 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 348 struct hda_codec *codec = hwdep->private_data; 349 int i, len = 0; 350 for (i = 0; i < codec->init_verbs.used; i++) { 351 struct hda_verb *v = snd_array_elem(&codec->init_verbs, i); 352 len += snprintf(buf + len, PAGE_SIZE - len, 353 "0x%02x 0x%03x 0x%04x\n", 354 v->nid, v->verb, v->param); 355 } 356 return len; 357 } 358 359 static int parse_init_verbs(struct hda_codec *codec, const char *buf) 360 { 361 struct hda_verb *v; 362 int nid, verb, param; 363 364 if (sscanf(buf, "%i %i %i", &nid, &verb, ¶m) != 3) 365 return -EINVAL; 366 if (!nid || !verb) 367 return -EINVAL; 368 v = snd_array_new(&codec->init_verbs); 369 if (!v) 370 return -ENOMEM; 371 v->nid = nid; 372 v->verb = verb; 373 v->param = param; 374 return 0; 375 } 376 377 static ssize_t init_verbs_store(struct device *dev, 378 struct device_attribute *attr, 379 const char *buf, size_t count) 380 { 381 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 382 struct hda_codec *codec = hwdep->private_data; 383 int err = parse_init_verbs(codec, buf); 384 if (err < 0) 385 return err; 386 return count; 387 } 388 389 static ssize_t hints_show(struct device *dev, 390 struct device_attribute *attr, 391 char *buf) 392 { 393 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 394 struct hda_codec *codec = hwdep->private_data; 395 int i, len = 0; 396 for (i = 0; i < codec->hints.used; i++) { 397 struct hda_hint *hint = snd_array_elem(&codec->hints, i); 398 len += snprintf(buf + len, PAGE_SIZE - len, 399 "%s = %s\n", hint->key, hint->val); 400 } 401 return len; 402 } 403 404 static struct hda_hint *get_hint(struct hda_codec *codec, const char *key) 405 { 406 int i; 407 408 for (i = 0; i < codec->hints.used; i++) { 409 struct hda_hint *hint = snd_array_elem(&codec->hints, i); 410 if (!strcmp(hint->key, key)) 411 return hint; 412 } 413 return NULL; 414 } 415 416 static void remove_trail_spaces(char *str) 417 { 418 char *p; 419 if (!*str) 420 return; 421 p = str + strlen(str) - 1; 422 for (; isspace(*p); p--) { 423 *p = 0; 424 if (p == str) 425 return; 426 } 427 } 428 429 #define MAX_HINTS 1024 430 431 static int parse_hints(struct hda_codec *codec, const char *buf) 432 { 433 char *key, *val; 434 struct hda_hint *hint; 435 436 buf = skip_spaces(buf); 437 if (!*buf || *buf == '#' || *buf == '\n') 438 return 0; 439 if (*buf == '=') 440 return -EINVAL; 441 key = kstrndup_noeol(buf, 1024); 442 if (!key) 443 return -ENOMEM; 444 /* extract key and val */ 445 val = strchr(key, '='); 446 if (!val) { 447 kfree(key); 448 return -EINVAL; 449 } 450 *val++ = 0; 451 val = skip_spaces(val); 452 remove_trail_spaces(key); 453 remove_trail_spaces(val); 454 hint = get_hint(codec, key); 455 if (hint) { 456 /* replace */ 457 kfree(hint->key); 458 hint->key = key; 459 hint->val = val; 460 return 0; 461 } 462 /* allocate a new hint entry */ 463 if (codec->hints.used >= MAX_HINTS) 464 hint = NULL; 465 else 466 hint = snd_array_new(&codec->hints); 467 if (!hint) { 468 kfree(key); 469 return -ENOMEM; 470 } 471 hint->key = key; 472 hint->val = val; 473 return 0; 474 } 475 476 static ssize_t hints_store(struct device *dev, 477 struct device_attribute *attr, 478 const char *buf, size_t count) 479 { 480 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 481 struct hda_codec *codec = hwdep->private_data; 482 int err = parse_hints(codec, buf); 483 if (err < 0) 484 return err; 485 return count; 486 } 487 488 static ssize_t pin_configs_show(struct hda_codec *codec, 489 struct snd_array *list, 490 char *buf) 491 { 492 int i, len = 0; 493 for (i = 0; i < list->used; i++) { 494 struct hda_pincfg *pin = snd_array_elem(list, i); 495 len += sprintf(buf + len, "0x%02x 0x%08x\n", 496 pin->nid, pin->cfg); 497 } 498 return len; 499 } 500 501 static ssize_t init_pin_configs_show(struct device *dev, 502 struct device_attribute *attr, 503 char *buf) 504 { 505 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 506 struct hda_codec *codec = hwdep->private_data; 507 return pin_configs_show(codec, &codec->init_pins, buf); 508 } 509 510 static ssize_t user_pin_configs_show(struct device *dev, 511 struct device_attribute *attr, 512 char *buf) 513 { 514 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 515 struct hda_codec *codec = hwdep->private_data; 516 return pin_configs_show(codec, &codec->user_pins, buf); 517 } 518 519 static ssize_t driver_pin_configs_show(struct device *dev, 520 struct device_attribute *attr, 521 char *buf) 522 { 523 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 524 struct hda_codec *codec = hwdep->private_data; 525 return pin_configs_show(codec, &codec->driver_pins, buf); 526 } 527 528 #define MAX_PIN_CONFIGS 32 529 530 static int parse_user_pin_configs(struct hda_codec *codec, const char *buf) 531 { 532 int nid, cfg; 533 534 if (sscanf(buf, "%i %i", &nid, &cfg) != 2) 535 return -EINVAL; 536 if (!nid) 537 return -EINVAL; 538 return snd_hda_add_pincfg(codec, &codec->user_pins, nid, cfg); 539 } 540 541 static ssize_t user_pin_configs_store(struct device *dev, 542 struct device_attribute *attr, 543 const char *buf, size_t count) 544 { 545 struct snd_hwdep *hwdep = dev_get_drvdata(dev); 546 struct hda_codec *codec = hwdep->private_data; 547 int err = parse_user_pin_configs(codec, buf); 548 if (err < 0) 549 return err; 550 return count; 551 } 552 553 #define CODEC_ATTR_RW(type) \ 554 __ATTR(type, 0644, type##_show, type##_store) 555 #define CODEC_ATTR_RO(type) \ 556 __ATTR_RO(type) 557 #define CODEC_ATTR_WO(type) \ 558 __ATTR(type, 0200, NULL, type##_store) 559 560 static struct device_attribute codec_attrs[] = { 561 CODEC_ATTR_RW(vendor_id), 562 CODEC_ATTR_RW(subsystem_id), 563 CODEC_ATTR_RW(revision_id), 564 CODEC_ATTR_RO(afg), 565 CODEC_ATTR_RO(mfg), 566 CODEC_ATTR_RW(vendor_name), 567 CODEC_ATTR_RW(chip_name), 568 CODEC_ATTR_RW(modelname), 569 CODEC_ATTR_RW(init_verbs), 570 CODEC_ATTR_RW(hints), 571 CODEC_ATTR_RO(init_pin_configs), 572 CODEC_ATTR_RW(user_pin_configs), 573 CODEC_ATTR_RO(driver_pin_configs), 574 CODEC_ATTR_WO(reconfig), 575 CODEC_ATTR_WO(clear), 576 }; 577 578 /* 579 * create sysfs files on hwdep directory 580 */ 581 int snd_hda_hwdep_add_sysfs(struct hda_codec *codec) 582 { 583 struct snd_hwdep *hwdep = codec->hwdep; 584 int i; 585 586 for (i = 0; i < ARRAY_SIZE(codec_attrs); i++) 587 snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, 588 hwdep->device, &codec_attrs[i]); 589 return 0; 590 } 591 592 /* 593 * Look for hint string 594 */ 595 const char *snd_hda_get_hint(struct hda_codec *codec, const char *key) 596 { 597 struct hda_hint *hint = get_hint(codec, key); 598 return hint ? hint->val : NULL; 599 } 600 EXPORT_SYMBOL_HDA(snd_hda_get_hint); 601 602 int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key) 603 { 604 const char *p = snd_hda_get_hint(codec, key); 605 if (!p || !*p) 606 return -ENOENT; 607 switch (toupper(*p)) { 608 case 'T': /* true */ 609 case 'Y': /* yes */ 610 case '1': 611 return 1; 612 } 613 return 0; 614 } 615 EXPORT_SYMBOL_HDA(snd_hda_get_bool_hint); 616 617 #endif /* CONFIG_SND_HDA_RECONFIG */ 618 619 #ifdef CONFIG_SND_HDA_PATCH_LOADER 620 621 /* parser mode */ 622 enum { 623 LINE_MODE_NONE, 624 LINE_MODE_CODEC, 625 LINE_MODE_MODEL, 626 LINE_MODE_PINCFG, 627 LINE_MODE_VERB, 628 LINE_MODE_HINT, 629 LINE_MODE_VENDOR_ID, 630 LINE_MODE_SUBSYSTEM_ID, 631 LINE_MODE_REVISION_ID, 632 LINE_MODE_CHIP_NAME, 633 NUM_LINE_MODES, 634 }; 635 636 static inline int strmatch(const char *a, const char *b) 637 { 638 return strnicmp(a, b, strlen(b)) == 0; 639 } 640 641 /* parse the contents after the line "[codec]" 642 * accept only the line with three numbers, and assign the current codec 643 */ 644 static void parse_codec_mode(char *buf, struct hda_bus *bus, 645 struct hda_codec **codecp) 646 { 647 int vendorid, subid, caddr; 648 struct hda_codec *codec; 649 650 *codecp = NULL; 651 if (sscanf(buf, "%i %i %i", &vendorid, &subid, &caddr) == 3) { 652 list_for_each_entry(codec, &bus->codec_list, list) { 653 if ((vendorid <= 0 || codec->vendor_id == vendorid) && 654 (subid <= 0 || codec->subsystem_id == subid) && 655 codec->addr == caddr) { 656 *codecp = codec; 657 break; 658 } 659 } 660 } 661 } 662 663 /* parse the contents after the other command tags, [pincfg], [verb], 664 * [vendor_id], [subsystem_id], [revision_id], [chip_name], [hint] and [model] 665 * just pass to the sysfs helper (only when any codec was specified) 666 */ 667 static void parse_pincfg_mode(char *buf, struct hda_bus *bus, 668 struct hda_codec **codecp) 669 { 670 parse_user_pin_configs(*codecp, buf); 671 } 672 673 static void parse_verb_mode(char *buf, struct hda_bus *bus, 674 struct hda_codec **codecp) 675 { 676 parse_init_verbs(*codecp, buf); 677 } 678 679 static void parse_hint_mode(char *buf, struct hda_bus *bus, 680 struct hda_codec **codecp) 681 { 682 parse_hints(*codecp, buf); 683 } 684 685 static void parse_model_mode(char *buf, struct hda_bus *bus, 686 struct hda_codec **codecp) 687 { 688 kfree((*codecp)->modelname); 689 (*codecp)->modelname = kstrdup(buf, GFP_KERNEL); 690 } 691 692 static void parse_chip_name_mode(char *buf, struct hda_bus *bus, 693 struct hda_codec **codecp) 694 { 695 kfree((*codecp)->chip_name); 696 (*codecp)->chip_name = kstrdup(buf, GFP_KERNEL); 697 } 698 699 #define DEFINE_PARSE_ID_MODE(name) \ 700 static void parse_##name##_mode(char *buf, struct hda_bus *bus, \ 701 struct hda_codec **codecp) \ 702 { \ 703 unsigned long val; \ 704 if (!strict_strtoul(buf, 0, &val)) \ 705 (*codecp)->name = val; \ 706 } 707 708 DEFINE_PARSE_ID_MODE(vendor_id); 709 DEFINE_PARSE_ID_MODE(subsystem_id); 710 DEFINE_PARSE_ID_MODE(revision_id); 711 712 713 struct hda_patch_item { 714 const char *tag; 715 void (*parser)(char *buf, struct hda_bus *bus, struct hda_codec **retc); 716 int need_codec; 717 }; 718 719 static struct hda_patch_item patch_items[NUM_LINE_MODES] = { 720 [LINE_MODE_CODEC] = { "[codec]", parse_codec_mode, 0 }, 721 [LINE_MODE_MODEL] = { "[model]", parse_model_mode, 1 }, 722 [LINE_MODE_VERB] = { "[verb]", parse_verb_mode, 1 }, 723 [LINE_MODE_PINCFG] = { "[pincfg]", parse_pincfg_mode, 1 }, 724 [LINE_MODE_HINT] = { "[hint]", parse_hint_mode, 1 }, 725 [LINE_MODE_VENDOR_ID] = { "[vendor_id]", parse_vendor_id_mode, 1 }, 726 [LINE_MODE_SUBSYSTEM_ID] = { "[subsystem_id]", parse_subsystem_id_mode, 1 }, 727 [LINE_MODE_REVISION_ID] = { "[revision_id]", parse_revision_id_mode, 1 }, 728 [LINE_MODE_CHIP_NAME] = { "[chip_name]", parse_chip_name_mode, 1 }, 729 }; 730 731 /* check the line starting with '[' -- change the parser mode accodingly */ 732 static int parse_line_mode(char *buf, struct hda_bus *bus) 733 { 734 int i; 735 for (i = 0; i < ARRAY_SIZE(patch_items); i++) { 736 if (!patch_items[i].tag) 737 continue; 738 if (strmatch(buf, patch_items[i].tag)) 739 return i; 740 } 741 return LINE_MODE_NONE; 742 } 743 744 /* copy one line from the buffer in fw, and update the fields in fw 745 * return zero if it reaches to the end of the buffer, or non-zero 746 * if successfully copied a line 747 * 748 * the spaces at the beginning and the end of the line are stripped 749 */ 750 static int get_line_from_fw(char *buf, int size, struct firmware *fw) 751 { 752 int len; 753 const char *p = fw->data; 754 while (isspace(*p) && fw->size) { 755 p++; 756 fw->size--; 757 } 758 if (!fw->size) 759 return 0; 760 761 for (len = 0; len < fw->size; len++) { 762 if (!*p) 763 break; 764 if (*p == '\n') { 765 p++; 766 len++; 767 break; 768 } 769 if (len < size) 770 *buf++ = *p++; 771 } 772 *buf = 0; 773 fw->size -= len; 774 fw->data = p; 775 remove_trail_spaces(buf); 776 return 1; 777 } 778 779 /* 780 * load a "patch" firmware file and parse it 781 */ 782 int snd_hda_load_patch(struct hda_bus *bus, const char *patch) 783 { 784 int err; 785 const struct firmware *fw; 786 struct firmware tmp; 787 char buf[128]; 788 struct hda_codec *codec; 789 int line_mode; 790 struct device *dev = bus->card->dev; 791 792 if (snd_BUG_ON(!dev)) 793 return -ENODEV; 794 err = request_firmware(&fw, patch, dev); 795 if (err < 0) { 796 printk(KERN_ERR "hda-codec: Cannot load the patch '%s'\n", 797 patch); 798 return err; 799 } 800 801 tmp = *fw; 802 line_mode = LINE_MODE_NONE; 803 codec = NULL; 804 while (get_line_from_fw(buf, sizeof(buf) - 1, &tmp)) { 805 if (!*buf || *buf == '#' || *buf == '\n') 806 continue; 807 if (*buf == '[') 808 line_mode = parse_line_mode(buf, bus); 809 else if (patch_items[line_mode].parser && 810 (codec || !patch_items[line_mode].need_codec)) 811 patch_items[line_mode].parser(buf, bus, &codec); 812 } 813 release_firmware(fw); 814 return 0; 815 } 816 EXPORT_SYMBOL_HDA(snd_hda_load_patch); 817 #endif /* CONFIG_SND_HDA_PATCH_LOADER */ 818