sound/pci/hda/hda_hwdep.c

   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, &param) != 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 */