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/export.h>
  29 #include <sound/core.h>
  30 #include "hda_codec.h"
  31 #include "hda_local.h"
  32 #include <sound/hda_hwdep.h>
  33 #include <sound/minors.h>
  34
  35 /* hint string pair */
  36 struct hda_hint {
  37         const char *key;
  38         const char *val;        /* contained in the same alloc as key */
  39 };
  40
  41 /*
  42  * write/read an out-of-bound verb
  43  */
  44 static int verb_write_ioctl(struct hda_codec *codec,
  45                             struct hda_verb_ioctl __user *arg)
  46 {
  47         u32 verb, res;
  48
  49         if (get_user(verb, &arg->verb))
  50                 return -EFAULT;
  51         res = snd_hda_codec_read(codec, verb >> 24, 0,
  52                                  (verb >> 8) & 0xffff, verb & 0xff);
  53         if (put_user(res, &arg->res))
  54                 return -EFAULT;
  55         return 0;
  56 }
  57
  58 static int get_wcap_ioctl(struct hda_codec *codec,
  59                           struct hda_verb_ioctl __user *arg)
  60 {
  61         u32 verb, res;
  62
  63         if (get_user(verb, &arg->verb))
  64                 return -EFAULT;
  65         res = get_wcaps(codec, verb >> 24);
  66         if (put_user(res, &arg->res))
  67                 return -EFAULT;
  68         return 0;
  69 }
  70
  71
  72 /*
  73  */
  74 static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
  75                            unsigned int cmd, unsigned long arg)
  76 {
  77         struct hda_codec *codec = hw->private_data;
  78         void __user *argp = (void __user *)arg;
  79
  80         switch (cmd) {
  81         case HDA_IOCTL_PVERSION:
  82                 return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
  83         case HDA_IOCTL_VERB_WRITE:
  84                 return verb_write_ioctl(codec, argp);
  85         case HDA_IOCTL_GET_WCAP:
  86                 return get_wcap_ioctl(codec, argp);
  87         }
  88         return -ENOIOCTLCMD;
  89 }
  90
  91 #ifdef CONFIG_COMPAT
  92 static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
  93                                   unsigned int cmd, unsigned long arg)
  94 {
  95         return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
  96 }
  97 #endif
  98
  99 static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
 100 {
 101 #ifndef CONFIG_SND_DEBUG_VERBOSE
 102         if (!capable(CAP_SYS_RAWIO))
 103                 return -EACCES;
 104 #endif
 105         return 0;
 106 }
 107
 108 static void clear_hwdep_elements(struct hda_codec *codec)
 109 {
 110         int i;
 111
 112         /* clear init verbs */
 113         snd_array_free(&codec->init_verbs);
 114         /* clear hints */
 115         for (i = 0; i < codec->hints.used; i++) {
 116                 struct hda_hint *hint = snd_array_elem(&codec->hints, i);
 117                 kfree(hint->key); /* we don't need to free hint->val */
 118         }
 119         snd_array_free(&codec->hints);
 120         snd_array_free(&codec->user_pins);
 121 }
 122
 123 static void hwdep_free(struct snd_hwdep *hwdep)
 124 {
 125         clear_hwdep_elements(hwdep->private_data);
 126 }
 127
 128 int snd_hda_create_hwdep(struct hda_codec *codec)
 129 {
 130         char hwname[16];
 131         struct snd_hwdep *hwdep;
 132         int err;
 133
 134         sprintf(hwname, "HDA Codec %d", codec->addr);
 135         err = snd_hwdep_new(codec->bus->card, hwname, codec->addr, &hwdep);
 136         if (err < 0)
 137                 return err;
 138         codec->hwdep = hwdep;
 139         sprintf(hwdep->name, "HDA Codec %d", codec->addr);
 140         hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
 141         hwdep->private_data = codec;
 142         hwdep->private_free = hwdep_free;
 143         hwdep->exclusive = 1;
 144
 145         hwdep->ops.open = hda_hwdep_open;
 146         hwdep->ops.ioctl = hda_hwdep_ioctl;
 147 #ifdef CONFIG_COMPAT
 148         hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
 149 #endif
 150
 151         mutex_init(&codec->user_mutex);
 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_PM
 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_PM */
 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 = kstrtoul(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         mutex_lock(&codec->user_mutex);
 351         for (i = 0; i < codec->init_verbs.used; i++) {
 352                 struct hda_verb *v = snd_array_elem(&codec->init_verbs, i);
 353                 len += snprintf(buf + len, PAGE_SIZE - len,
 354                                 "0x%02x 0x%03x 0x%04x\n",
 355                                 v->nid, v->verb, v->param);
 356         }
 357         mutex_unlock(&codec->user_mutex);
 358         return len;
 359 }
 360
 361 static int parse_init_verbs(struct hda_codec *codec, const char *buf)
 362 {
 363         struct hda_verb *v;
 364         int nid, verb, param;
 365
 366         if (sscanf(buf, "%i %i %i", &nid, &verb, &param) != 3)
 367                 return -EINVAL;
 368         if (!nid || !verb)
 369                 return -EINVAL;
 370         mutex_lock(&codec->user_mutex);
 371         v = snd_array_new(&codec->init_verbs);
 372         if (!v) {
 373                 mutex_unlock(&codec->user_mutex);
 374                 return -ENOMEM;
 375         }
 376         v->nid = nid;
 377         v->verb = verb;
 378         v->param = param;
 379         mutex_unlock(&codec->user_mutex);
 380         return 0;
 381 }
 382
 383 static ssize_t init_verbs_store(struct device *dev,
 384                                 struct device_attribute *attr,
 385                                 const char *buf, size_t count)
 386 {
 387         struct snd_hwdep *hwdep = dev_get_drvdata(dev);
 388         struct hda_codec *codec = hwdep->private_data;
 389         int err = parse_init_verbs(codec, buf);
 390         if (err < 0)
 391                 return err;
 392         return count;
 393 }
 394
 395 static ssize_t hints_show(struct device *dev,
 396                           struct device_attribute *attr,
 397                           char *buf)
 398 {
 399         struct snd_hwdep *hwdep = dev_get_drvdata(dev);
 400         struct hda_codec *codec = hwdep->private_data;
 401         int i, len = 0;
 402         mutex_lock(&codec->user_mutex);
 403         for (i = 0; i < codec->hints.used; i++) {
 404                 struct hda_hint *hint = snd_array_elem(&codec->hints, i);
 405                 len += snprintf(buf + len, PAGE_SIZE - len,
 406                                 "%s = %s\n", hint->key, hint->val);
 407         }
 408         mutex_unlock(&codec->user_mutex);
 409         return len;
 410 }
 411
 412 static struct hda_hint *get_hint(struct hda_codec *codec, const char *key)
 413 {
 414         int i;
 415
 416         for (i = 0; i < codec->hints.used; i++) {
 417                 struct hda_hint *hint = snd_array_elem(&codec->hints, i);
 418                 if (!strcmp(hint->key, key))
 419                         return hint;
 420         }
 421         return NULL;
 422 }
 423
 424 static void remove_trail_spaces(char *str)
 425 {
 426         char *p;
 427         if (!*str)
 428                 return;
 429         p = str + strlen(str) - 1;
 430         for (; isspace(*p); p--) {
 431                 *p = 0;
 432                 if (p == str)
 433                         return;
 434         }
 435 }
 436
 437 #define MAX_HINTS       1024
 438
 439 static int parse_hints(struct hda_codec *codec, const char *buf)
 440 {
 441         char *key, *val;
 442         struct hda_hint *hint;
 443         int err = 0;
 444
 445         buf = skip_spaces(buf);
 446         if (!*buf || *buf == '#' || *buf == '\n')
 447                 return 0;
 448         if (*buf == '=')
 449                 return -EINVAL;
 450         key = kstrndup_noeol(buf, 1024);
 451         if (!key)
 452                 return -ENOMEM;
 453         /* extract key and val */
 454         val = strchr(key, '=');
 455         if (!val) {
 456                 kfree(key);
 457                 return -EINVAL;
 458         }
 459         *val++ = 0;
 460         val = skip_spaces(val);
 461         remove_trail_spaces(key);
 462         remove_trail_spaces(val);
 463         mutex_lock(&codec->user_mutex);
 464         hint = get_hint(codec, key);
 465         if (hint) {
 466                 /* replace */
 467                 kfree(hint->key);
 468                 hint->key = key;
 469                 hint->val = val;
 470                 goto unlock;
 471         }
 472         /* allocate a new hint entry */
 473         if (codec->hints.used >= MAX_HINTS)
 474                 hint = NULL;
 475         else
 476                 hint = snd_array_new(&codec->hints);
 477         if (hint) {
 478                 hint->key = key;
 479                 hint->val = val;
 480         } else {
 481                 err = -ENOMEM;
 482         }
 483  unlock:
 484         mutex_unlock(&codec->user_mutex);
 485         if (err)
 486                 kfree(key);
 487         return err;
 488 }
 489
 490 static ssize_t hints_store(struct device *dev,
 491                            struct device_attribute *attr,
 492                            const char *buf, size_t count)
 493 {
 494         struct snd_hwdep *hwdep = dev_get_drvdata(dev);
 495         struct hda_codec *codec = hwdep->private_data;
 496         int err = parse_hints(codec, buf);
 497         if (err < 0)
 498                 return err;
 499         return count;
 500 }
 501
 502 static ssize_t pin_configs_show(struct hda_codec *codec,
 503                                 struct snd_array *list,
 504                                 char *buf)
 505 {
 506         int i, len = 0;
 507         mutex_lock(&codec->user_mutex);
 508         for (i = 0; i < list->used; i++) {
 509                 struct hda_pincfg *pin = snd_array_elem(list, i);
 510                 len += sprintf(buf + len, "0x%02x 0x%08x\n",
 511                                pin->nid, pin->cfg);
 512         }
 513         mutex_unlock(&codec->user_mutex);
 514         return len;
 515 }
 516
 517 static ssize_t init_pin_configs_show(struct device *dev,
 518                                      struct device_attribute *attr,
 519                                      char *buf)
 520 {
 521         struct snd_hwdep *hwdep = dev_get_drvdata(dev);
 522         struct hda_codec *codec = hwdep->private_data;
 523         return pin_configs_show(codec, &codec->init_pins, buf);
 524 }
 525
 526 static ssize_t user_pin_configs_show(struct device *dev,
 527                                      struct device_attribute *attr,
 528                                      char *buf)
 529 {
 530         struct snd_hwdep *hwdep = dev_get_drvdata(dev);
 531         struct hda_codec *codec = hwdep->private_data;
 532         return pin_configs_show(codec, &codec->user_pins, buf);
 533 }
 534
 535 static ssize_t driver_pin_configs_show(struct device *dev,
 536                                        struct device_attribute *attr,
 537                                        char *buf)
 538 {
 539         struct snd_hwdep *hwdep = dev_get_drvdata(dev);
 540         struct hda_codec *codec = hwdep->private_data;
 541         return pin_configs_show(codec, &codec->driver_pins, buf);
 542 }
 543
 544 #define MAX_PIN_CONFIGS         32
 545
 546 static int parse_user_pin_configs(struct hda_codec *codec, const char *buf)
 547 {
 548         int nid, cfg, err;
 549
 550         if (sscanf(buf, "%i %i", &nid, &cfg) != 2)
 551                 return -EINVAL;
 552         if (!nid)
 553                 return -EINVAL;
 554         mutex_lock(&codec->user_mutex);
 555         err = snd_hda_add_pincfg(codec, &codec->user_pins, nid, cfg);
 556         mutex_unlock(&codec->user_mutex);
 557         return err;
 558 }
 559
 560 static ssize_t user_pin_configs_store(struct device *dev,
 561                                       struct device_attribute *attr,
 562                                       const char *buf, size_t count)
 563 {
 564         struct snd_hwdep *hwdep = dev_get_drvdata(dev);
 565         struct hda_codec *codec = hwdep->private_data;
 566         int err = parse_user_pin_configs(codec, buf);
 567         if (err < 0)
 568                 return err;
 569         return count;
 570 }
 571
 572 #define CODEC_ATTR_RW(type) \
 573         __ATTR(type, 0644, type##_show, type##_store)
 574 #define CODEC_ATTR_RO(type) \
 575         __ATTR_RO(type)
 576 #define CODEC_ATTR_WO(type) \
 577         __ATTR(type, 0200, NULL, type##_store)
 578
 579 static struct device_attribute codec_attrs[] = {
 580         CODEC_ATTR_RW(vendor_id),
 581         CODEC_ATTR_RW(subsystem_id),
 582         CODEC_ATTR_RW(revision_id),
 583         CODEC_ATTR_RO(afg),
 584         CODEC_ATTR_RO(mfg),
 585         CODEC_ATTR_RW(vendor_name),
 586         CODEC_ATTR_RW(chip_name),
 587         CODEC_ATTR_RW(modelname),
 588         CODEC_ATTR_RW(init_verbs),
 589         CODEC_ATTR_RW(hints),
 590         CODEC_ATTR_RO(init_pin_configs),
 591         CODEC_ATTR_RW(user_pin_configs),
 592         CODEC_ATTR_RO(driver_pin_configs),
 593         CODEC_ATTR_WO(reconfig),
 594         CODEC_ATTR_WO(clear),
 595 };
 596
 597 /*
 598  * create sysfs files on hwdep directory
 599  */
 600 int snd_hda_hwdep_add_sysfs(struct hda_codec *codec)
 601 {
 602         struct snd_hwdep *hwdep = codec->hwdep;
 603         int i;
 604
 605         for (i = 0; i < ARRAY_SIZE(codec_attrs); i++)
 606                 snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card,
 607                                           hwdep->device, &codec_attrs[i]);
 608         return 0;
 609 }
 610
 611 /*
 612  * Look for hint string
 613  */
 614 const char *snd_hda_get_hint(struct hda_codec *codec, const char *key)
 615 {
 616         struct hda_hint *hint = get_hint(codec, key);
 617         return hint ? hint->val : NULL;
 618 }
 619 EXPORT_SYMBOL_HDA(snd_hda_get_hint);
 620
 621 int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key)
 622 {
 623         const char *p;
 624         int ret;
 625
 626         mutex_lock(&codec->user_mutex);
 627         p = snd_hda_get_hint(codec, key);
 628         if (!p || !*p)
 629                 ret = -ENOENT;
 630         else {
 631                 switch (toupper(*p)) {
 632                 case 'T': /* true */
 633                 case 'Y': /* yes */
 634                 case '1':
 635                         ret = 1;
 636                         break;
 637                 default:
 638                         ret = 0;
 639                         break;
 640                 }
 641         }
 642         mutex_unlock(&codec->user_mutex);
 643         return ret;
 644 }
 645 EXPORT_SYMBOL_HDA(snd_hda_get_bool_hint);
 646
 647 int snd_hda_get_int_hint(struct hda_codec *codec, const char *key, int *valp)
 648 {
 649         const char *p;
 650         unsigned long val;
 651         int ret;
 652
 653         mutex_lock(&codec->user_mutex);
 654         p = snd_hda_get_hint(codec, key);
 655         if (!p)
 656                 ret = -ENOENT;
 657         else if (kstrtoul(p, 0, &val))
 658                 ret = -EINVAL;
 659         else {
 660                 *valp = val;
 661                 ret = 0;
 662         }
 663         mutex_unlock(&codec->user_mutex);
 664         return ret;
 665 }
 666 EXPORT_SYMBOL_HDA(snd_hda_get_int_hint);
 667 #endif /* CONFIG_SND_HDA_RECONFIG */
 668
 669 #ifdef CONFIG_SND_HDA_PATCH_LOADER
 670
 671 /* parser mode */
 672 enum {
 673         LINE_MODE_NONE,
 674         LINE_MODE_CODEC,
 675         LINE_MODE_MODEL,
 676         LINE_MODE_PINCFG,
 677         LINE_MODE_VERB,
 678         LINE_MODE_HINT,
 679         LINE_MODE_VENDOR_ID,
 680         LINE_MODE_SUBSYSTEM_ID,
 681         LINE_MODE_REVISION_ID,
 682         LINE_MODE_CHIP_NAME,
 683         NUM_LINE_MODES,
 684 };
 685
 686 static inline int strmatch(const char *a, const char *b)
 687 {
 688         return strnicmp(a, b, strlen(b)) == 0;
 689 }
 690
 691 /* parse the contents after the line "[codec]"
 692  * accept only the line with three numbers, and assign the current codec
 693  */
 694 static void parse_codec_mode(char *buf, struct hda_bus *bus,
 695                              struct hda_codec **codecp)
 696 {
 697         int vendorid, subid, caddr;
 698         struct hda_codec *codec;
 699
 700         *codecp = NULL;
 701         if (sscanf(buf, "%i %i %i", &vendorid, &subid, &caddr) == 3) {
 702                 list_for_each_entry(codec, &bus->codec_list, list) {
 703                         if ((vendorid <= 0 || codec->vendor_id == vendorid) &&
 704                             (subid <= 0 || codec->subsystem_id == subid) &&
 705                             codec->addr == caddr) {
 706                                 *codecp = codec;
 707                                 break;
 708                         }
 709                 }
 710         }
 711 }
 712
 713 /* parse the contents after the other command tags, [pincfg], [verb],
 714  * [vendor_id], [subsystem_id], [revision_id], [chip_name], [hint] and [model]
 715  * just pass to the sysfs helper (only when any codec was specified)
 716  */
 717 static void parse_pincfg_mode(char *buf, struct hda_bus *bus,
 718                               struct hda_codec **codecp)
 719 {
 720         parse_user_pin_configs(*codecp, buf);
 721 }
 722
 723 static void parse_verb_mode(char *buf, struct hda_bus *bus,
 724                             struct hda_codec **codecp)
 725 {
 726         parse_init_verbs(*codecp, buf);
 727 }
 728
 729 static void parse_hint_mode(char *buf, struct hda_bus *bus,
 730                             struct hda_codec **codecp)
 731 {
 732         parse_hints(*codecp, buf);
 733 }
 734
 735 static void parse_model_mode(char *buf, struct hda_bus *bus,
 736                              struct hda_codec **codecp)
 737 {
 738         kfree((*codecp)->modelname);
 739         (*codecp)->modelname = kstrdup(buf, GFP_KERNEL);
 740 }
 741
 742 static void parse_chip_name_mode(char *buf, struct hda_bus *bus,
 743                                  struct hda_codec **codecp)
 744 {
 745         kfree((*codecp)->chip_name);
 746         (*codecp)->chip_name = kstrdup(buf, GFP_KERNEL);
 747 }
 748
 749 #define DEFINE_PARSE_ID_MODE(name) \
 750 static void parse_##name##_mode(char *buf, struct hda_bus *bus, \
 751                                  struct hda_codec **codecp) \
 752 { \
 753         unsigned long val; \
 754         if (!kstrtoul(buf, 0, &val)) \
 755                 (*codecp)->name = val; \
 756 }
 757
 758 DEFINE_PARSE_ID_MODE(vendor_id);
 759 DEFINE_PARSE_ID_MODE(subsystem_id);
 760 DEFINE_PARSE_ID_MODE(revision_id);
 761
 762
 763 struct hda_patch_item {
 764         const char *tag;
 765         void (*parser)(char *buf, struct hda_bus *bus, struct hda_codec **retc);
 766         int need_codec;
 767 };
 768
 769 static struct hda_patch_item patch_items[NUM_LINE_MODES] = {
 770         [LINE_MODE_CODEC] = { "[codec]", parse_codec_mode, 0 },
 771         [LINE_MODE_MODEL] = { "[model]", parse_model_mode, 1 },
 772         [LINE_MODE_VERB] = { "[verb]", parse_verb_mode, 1 },
 773         [LINE_MODE_PINCFG] = { "[pincfg]", parse_pincfg_mode, 1 },
 774         [LINE_MODE_HINT] = { "[hint]", parse_hint_mode, 1 },
 775         [LINE_MODE_VENDOR_ID] = { "[vendor_id]", parse_vendor_id_mode, 1 },
 776         [LINE_MODE_SUBSYSTEM_ID] = { "[subsystem_id]", parse_subsystem_id_mode, 1 },
 777         [LINE_MODE_REVISION_ID] = { "[revision_id]", parse_revision_id_mode, 1 },
 778         [LINE_MODE_CHIP_NAME] = { "[chip_name]", parse_chip_name_mode, 1 },
 779 };
 780
 781 /* check the line starting with '[' -- change the parser mode accodingly */
 782 static int parse_line_mode(char *buf, struct hda_bus *bus)
 783 {
 784         int i;
 785         for (i = 0; i < ARRAY_SIZE(patch_items); i++) {
 786                 if (!patch_items[i].tag)
 787                         continue;
 788                 if (strmatch(buf, patch_items[i].tag))
 789                         return i;
 790         }
 791         return LINE_MODE_NONE;
 792 }
 793
 794 /* copy one line from the buffer in fw, and update the fields in fw
 795  * return zero if it reaches to the end of the buffer, or non-zero
 796  * if successfully copied a line
 797  *
 798  * the spaces at the beginning and the end of the line are stripped
 799  */
 800 static int get_line_from_fw(char *buf, int size, size_t *fw_size_p,
 801                             const void **fw_data_p)
 802 {
 803         int len;
 804         size_t fw_size = *fw_size_p;
 805         const char *p = *fw_data_p;
 806
 807         while (isspace(*p) && fw_size) {
 808                 p++;
 809                 fw_size--;
 810         }
 811         if (!fw_size)
 812                 return 0;
 813
 814         for (len = 0; len < fw_size; len++) {
 815                 if (!*p)
 816                         break;
 817                 if (*p == '\n') {
 818                         p++;
 819                         len++;
 820                         break;
 821                 }
 822                 if (len < size)
 823                         *buf++ = *p++;
 824         }
 825         *buf = 0;
 826         *fw_size_p = fw_size - len;
 827         *fw_data_p = p;
 828         remove_trail_spaces(buf);
 829         return 1;
 830 }
 831
 832 /*
 833  * load a "patch" firmware file and parse it
 834  */
 835 int snd_hda_load_patch(struct hda_bus *bus, size_t fw_size, const void *fw_buf)
 836 {
 837         char buf[128];
 838         struct hda_codec *codec;
 839         int line_mode;
 840
 841         line_mode = LINE_MODE_NONE;
 842         codec = NULL;
 843         while (get_line_from_fw(buf, sizeof(buf) - 1, &fw_size, &fw_buf)) {
 844                 if (!*buf || *buf == '#' || *buf == '\n')
 845                         continue;
 846                 if (*buf == '[')
 847                         line_mode = parse_line_mode(buf, bus);
 848                 else if (patch_items[line_mode].parser &&
 849                          (codec || !patch_items[line_mode].need_codec))
 850                         patch_items[line_mode].parser(buf, bus, &codec);
 851         }
 852         return 0;
 853 }
 854 EXPORT_SYMBOL_HDA(snd_hda_load_patch);
 855 #endif /* CONFIG_SND_HDA_PATCH_LOADER */