sound/core/jack.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Jack abstraction layer
   4  *
   5  *  Copyright 2008 Wolfson Microelectronics
   6  */
   7
   8 #include <linux/input.h>
   9 #include <linux/slab.h>
  10 #include <linux/module.h>
  11 #include <linux/ctype.h>
  12 #include <linux/mm.h>
  13 #include <linux/debugfs.h>
  14 #include <sound/jack.h>
  15 #include <sound/core.h>
  16 #include <sound/control.h>
  17
  18 struct snd_jack_kctl {
  19         struct snd_kcontrol *kctl;
  20         struct list_head list;  /* list of controls belong to the same jack */
  21         unsigned int mask_bits; /* only masked status bits are reported via kctl */
  22         struct snd_jack *jack;  /* pointer to struct snd_jack */
  23         bool sw_inject_enable;  /* allow to inject plug event via debugfs */
  24 #ifdef CONFIG_SND_JACK_INJECTION_DEBUG
  25         struct dentry *jack_debugfs_root; /* jack_kctl debugfs root */
  26 #endif
  27 };
  28
  29 #ifdef CONFIG_SND_JACK_INPUT_DEV
  30 static const int jack_switch_types[SND_JACK_SWITCH_TYPES] = {
  31         SW_HEADPHONE_INSERT,
  32         SW_MICROPHONE_INSERT,
  33         SW_LINEOUT_INSERT,
  34         SW_JACK_PHYSICAL_INSERT,
  35         SW_VIDEOOUT_INSERT,
  36         SW_LINEIN_INSERT,
  37 };
  38 #endif /* CONFIG_SND_JACK_INPUT_DEV */
  39
  40 static int snd_jack_dev_disconnect(struct snd_device *device)
  41 {
  42 #ifdef CONFIG_SND_JACK_INPUT_DEV
  43         struct snd_jack *jack = device->device_data;
  44
  45         mutex_lock(&jack->input_dev_lock);
  46         if (!jack->input_dev) {
  47                 mutex_unlock(&jack->input_dev_lock);
  48                 return 0;
  49         }
  50
  51         /* If the input device is registered with the input subsystem
  52          * then we need to use a different deallocator. */
  53         if (jack->registered)
  54                 input_unregister_device(jack->input_dev);
  55         else
  56                 input_free_device(jack->input_dev);
  57         jack->input_dev = NULL;
  58         mutex_unlock(&jack->input_dev_lock);
  59 #endif /* CONFIG_SND_JACK_INPUT_DEV */
  60         return 0;
  61 }
  62
  63 static int snd_jack_dev_free(struct snd_device *device)
  64 {
  65         struct snd_jack *jack = device->device_data;
  66         struct snd_card *card = device->card;
  67         struct snd_jack_kctl *jack_kctl, *tmp_jack_kctl;
  68
  69         list_for_each_entry_safe(jack_kctl, tmp_jack_kctl, &jack->kctl_list, list) {
  70                 list_del_init(&jack_kctl->list);
  71                 snd_ctl_remove(card, jack_kctl->kctl);
  72         }
  73
  74         if (jack->private_free)
  75                 jack->private_free(jack);
  76
  77         snd_jack_dev_disconnect(device);
  78
  79         kfree(jack->id);
  80         kfree(jack);
  81
  82         return 0;
  83 }
  84
  85 #ifdef CONFIG_SND_JACK_INPUT_DEV
  86 static int snd_jack_dev_register(struct snd_device *device)
  87 {
  88         struct snd_jack *jack = device->device_data;
  89         struct snd_card *card = device->card;
  90         int err, i;
  91
  92         snprintf(jack->name, sizeof(jack->name), "%s %s",
  93                  card->shortname, jack->id);
  94
  95         mutex_lock(&jack->input_dev_lock);
  96         if (!jack->input_dev) {
  97                 mutex_unlock(&jack->input_dev_lock);
  98                 return 0;
  99         }
 100
 101         jack->input_dev->name = jack->name;
 102
 103         /* Default to the sound card device. */
 104         if (!jack->input_dev->dev.parent)
 105                 jack->input_dev->dev.parent = snd_card_get_device_link(card);
 106
 107         /* Add capabilities for any keys that are enabled */
 108         for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
 109                 int testbit = SND_JACK_BTN_0 >> i;
 110
 111                 if (!(jack->type & testbit))
 112                         continue;
 113
 114                 if (!jack->key[i])
 115                         jack->key[i] = BTN_0 + i;
 116
 117                 input_set_capability(jack->input_dev, EV_KEY, jack->key[i]);
 118         }
 119
 120         err = input_register_device(jack->input_dev);
 121         if (err == 0)
 122                 jack->registered = 1;
 123
 124         mutex_unlock(&jack->input_dev_lock);
 125         return err;
 126 }
 127 #endif /* CONFIG_SND_JACK_INPUT_DEV */
 128
 129 #ifdef CONFIG_SND_JACK_INJECTION_DEBUG
 130 static void snd_jack_inject_report(struct snd_jack_kctl *jack_kctl, int status)
 131 {
 132         struct snd_jack *jack;
 133 #ifdef CONFIG_SND_JACK_INPUT_DEV
 134         int i;
 135 #endif
 136         if (!jack_kctl)
 137                 return;
 138
 139         jack = jack_kctl->jack;
 140
 141         if (jack_kctl->sw_inject_enable)
 142                 snd_kctl_jack_report(jack->card, jack_kctl->kctl,
 143                                      status & jack_kctl->mask_bits);
 144
 145 #ifdef CONFIG_SND_JACK_INPUT_DEV
 146         if (!jack->input_dev)
 147                 return;
 148
 149         for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
 150                 int testbit = ((SND_JACK_BTN_0 >> i) & jack_kctl->mask_bits);
 151
 152                 if (jack->type & testbit)
 153                         input_report_key(jack->input_dev, jack->key[i],
 154                                          status & testbit);
 155         }
 156
 157         for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) {
 158                 int testbit = ((1 << i) & jack_kctl->mask_bits);
 159
 160                 if (jack->type & testbit)
 161                         input_report_switch(jack->input_dev,
 162                                             jack_switch_types[i],
 163                                             status & testbit);
 164         }
 165
 166         input_sync(jack->input_dev);
 167 #endif /* CONFIG_SND_JACK_INPUT_DEV */
 168 }
 169
 170 static ssize_t sw_inject_enable_read(struct file *file,
 171                                      char __user *to, size_t count, loff_t *ppos)
 172 {
 173         struct snd_jack_kctl *jack_kctl = file->private_data;
 174         int len, ret;
 175         char buf[128];
 176
 177         len = scnprintf(buf, sizeof(buf), "%s: %s\t\t%s: %i\n", "Jack", jack_kctl->kctl->id.name,
 178                         "Inject Enabled", jack_kctl->sw_inject_enable);
 179         ret = simple_read_from_buffer(to, count, ppos, buf, len);
 180
 181         return ret;
 182 }
 183
 184 static ssize_t sw_inject_enable_write(struct file *file,
 185                                       const char __user *from, size_t count, loff_t *ppos)
 186 {
 187         struct snd_jack_kctl *jack_kctl = file->private_data;
 188         int ret, err;
 189         unsigned long enable;
 190         char buf[8] = { 0 };
 191
 192         ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, from, count);
 193         err = kstrtoul(buf, 0, &enable);
 194         if (err)
 195                 return err;
 196
 197         if (jack_kctl->sw_inject_enable == (!!enable))
 198                 return ret;
 199
 200         jack_kctl->sw_inject_enable = !!enable;
 201
 202         if (!jack_kctl->sw_inject_enable)
 203                 snd_jack_report(jack_kctl->jack, jack_kctl->jack->hw_status_cache);
 204
 205         return ret;
 206 }
 207
 208 static ssize_t jackin_inject_write(struct file *file,
 209                                    const char __user *from, size_t count, loff_t *ppos)
 210 {
 211         struct snd_jack_kctl *jack_kctl = file->private_data;
 212         int ret, err;
 213         unsigned long enable;
 214         char buf[8] = { 0 };
 215
 216         if (!jack_kctl->sw_inject_enable)
 217                 return -EINVAL;
 218
 219         ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, from, count);
 220         err = kstrtoul(buf, 0, &enable);
 221         if (err)
 222                 return err;
 223
 224         snd_jack_inject_report(jack_kctl, !!enable ? jack_kctl->mask_bits : 0);
 225
 226         return ret;
 227 }
 228
 229 static ssize_t jack_kctl_id_read(struct file *file,
 230                                  char __user *to, size_t count, loff_t *ppos)
 231 {
 232         struct snd_jack_kctl *jack_kctl = file->private_data;
 233         char buf[64];
 234         int len, ret;
 235
 236         len = scnprintf(buf, sizeof(buf), "%s\n", jack_kctl->kctl->id.name);
 237         ret = simple_read_from_buffer(to, count, ppos, buf, len);
 238
 239         return ret;
 240 }
 241
 242 /* the bit definition is aligned with snd_jack_types in jack.h */
 243 static const char * const jack_events_name[] = {
 244         "HEADPHONE(0x0001)", "MICROPHONE(0x0002)", "LINEOUT(0x0004)",
 245         "MECHANICAL(0x0008)", "VIDEOOUT(0x0010)", "LINEIN(0x0020)",
 246         "", "", "", "BTN_5(0x0200)", "BTN_4(0x0400)", "BTN_3(0x0800)",
 247         "BTN_2(0x1000)", "BTN_1(0x2000)", "BTN_0(0x4000)", "",
 248 };
 249
 250 /* the recommended buffer size is 256 */
 251 static int parse_mask_bits(unsigned int mask_bits, char *buf, size_t buf_size)
 252 {
 253         int i;
 254
 255         scnprintf(buf, buf_size, "0x%04x", mask_bits);
 256
 257         for (i = 0; i < ARRAY_SIZE(jack_events_name); i++)
 258                 if (mask_bits & (1 << i)) {
 259                         strlcat(buf, " ", buf_size);
 260                         strlcat(buf, jack_events_name[i], buf_size);
 261                 }
 262         strlcat(buf, "\n", buf_size);
 263
 264         return strlen(buf);
 265 }
 266
 267 static ssize_t jack_kctl_mask_bits_read(struct file *file,
 268                                         char __user *to, size_t count, loff_t *ppos)
 269 {
 270         struct snd_jack_kctl *jack_kctl = file->private_data;
 271         char buf[256];
 272         int len, ret;
 273
 274         len = parse_mask_bits(jack_kctl->mask_bits, buf, sizeof(buf));
 275         ret = simple_read_from_buffer(to, count, ppos, buf, len);
 276
 277         return ret;
 278 }
 279
 280 static ssize_t jack_kctl_status_read(struct file *file,
 281                                      char __user *to, size_t count, loff_t *ppos)
 282 {
 283         struct snd_jack_kctl *jack_kctl = file->private_data;
 284         char buf[16];
 285         int len, ret;
 286
 287         len = scnprintf(buf, sizeof(buf), "%s\n", jack_kctl->kctl->private_value ?
 288                         "Plugged" : "Unplugged");
 289         ret = simple_read_from_buffer(to, count, ppos, buf, len);
 290
 291         return ret;
 292 }
 293
 294 #ifdef CONFIG_SND_JACK_INPUT_DEV
 295 static ssize_t jack_type_read(struct file *file,
 296                               char __user *to, size_t count, loff_t *ppos)
 297 {
 298         struct snd_jack_kctl *jack_kctl = file->private_data;
 299         char buf[256];
 300         int len, ret;
 301
 302         len = parse_mask_bits(jack_kctl->jack->type, buf, sizeof(buf));
 303         ret = simple_read_from_buffer(to, count, ppos, buf, len);
 304
 305         return ret;
 306 }
 307
 308 static const struct file_operations jack_type_fops = {
 309         .open = simple_open,
 310         .read = jack_type_read,
 311         .llseek = default_llseek,
 312 };
 313 #endif
 314
 315 static const struct file_operations sw_inject_enable_fops = {
 316         .open = simple_open,
 317         .read = sw_inject_enable_read,
 318         .write = sw_inject_enable_write,
 319         .llseek = default_llseek,
 320 };
 321
 322 static const struct file_operations jackin_inject_fops = {
 323         .open = simple_open,
 324         .write = jackin_inject_write,
 325         .llseek = default_llseek,
 326 };
 327
 328 static const struct file_operations jack_kctl_id_fops = {
 329         .open = simple_open,
 330         .read = jack_kctl_id_read,
 331         .llseek = default_llseek,
 332 };
 333
 334 static const struct file_operations jack_kctl_mask_bits_fops = {
 335         .open = simple_open,
 336         .read = jack_kctl_mask_bits_read,
 337         .llseek = default_llseek,
 338 };
 339
 340 static const struct file_operations jack_kctl_status_fops = {
 341         .open = simple_open,
 342         .read = jack_kctl_status_read,
 343         .llseek = default_llseek,
 344 };
 345
 346 static int snd_jack_debugfs_add_inject_node(struct snd_jack *jack,
 347                                             struct snd_jack_kctl *jack_kctl)
 348 {
 349         char *tname;
 350         int i;
 351
 352         /* Don't create injection interface for Phantom jacks */
 353         if (strstr(jack_kctl->kctl->id.name, "Phantom"))
 354                 return 0;
 355
 356         tname = kstrdup(jack_kctl->kctl->id.name, GFP_KERNEL);
 357         if (!tname)
 358                 return -ENOMEM;
 359
 360         /* replace the chars which are not suitable for folder's name with _ */
 361         for (i = 0; tname[i]; i++)
 362                 if (!isalnum(tname[i]))
 363                         tname[i] = '_';
 364
 365         jack_kctl->jack_debugfs_root = debugfs_create_dir(tname, jack->card->debugfs_root);
 366         kfree(tname);
 367
 368         debugfs_create_file("sw_inject_enable", 0644, jack_kctl->jack_debugfs_root, jack_kctl,
 369                             &sw_inject_enable_fops);
 370
 371         debugfs_create_file("jackin_inject", 0200, jack_kctl->jack_debugfs_root, jack_kctl,
 372                             &jackin_inject_fops);
 373
 374         debugfs_create_file("kctl_id", 0444, jack_kctl->jack_debugfs_root, jack_kctl,
 375                             &jack_kctl_id_fops);
 376
 377         debugfs_create_file("mask_bits", 0444, jack_kctl->jack_debugfs_root, jack_kctl,
 378                             &jack_kctl_mask_bits_fops);
 379
 380         debugfs_create_file("status", 0444, jack_kctl->jack_debugfs_root, jack_kctl,
 381                             &jack_kctl_status_fops);
 382
 383 #ifdef CONFIG_SND_JACK_INPUT_DEV
 384         debugfs_create_file("type", 0444, jack_kctl->jack_debugfs_root, jack_kctl,
 385                             &jack_type_fops);
 386 #endif
 387         return 0;
 388 }
 389
 390 static void snd_jack_debugfs_clear_inject_node(struct snd_jack_kctl *jack_kctl)
 391 {
 392         debugfs_remove(jack_kctl->jack_debugfs_root);
 393         jack_kctl->jack_debugfs_root = NULL;
 394 }
 395 #else /* CONFIG_SND_JACK_INJECTION_DEBUG */
 396 static int snd_jack_debugfs_add_inject_node(struct snd_jack *jack,
 397                                             struct snd_jack_kctl *jack_kctl)
 398 {
 399         return 0;
 400 }
 401
 402 static void snd_jack_debugfs_clear_inject_node(struct snd_jack_kctl *jack_kctl)
 403 {
 404 }
 405 #endif /* CONFIG_SND_JACK_INJECTION_DEBUG */
 406
 407 static void snd_jack_kctl_private_free(struct snd_kcontrol *kctl)
 408 {
 409         struct snd_jack_kctl *jack_kctl;
 410
 411         jack_kctl = kctl->private_data;
 412         if (jack_kctl) {
 413                 snd_jack_debugfs_clear_inject_node(jack_kctl);
 414                 list_del(&jack_kctl->list);
 415                 kfree(jack_kctl);
 416         }
 417 }
 418
 419 static void snd_jack_kctl_add(struct snd_jack *jack, struct snd_jack_kctl *jack_kctl)
 420 {
 421         jack_kctl->jack = jack;
 422         list_add_tail(&jack_kctl->list, &jack->kctl_list);
 423         snd_jack_debugfs_add_inject_node(jack, jack_kctl);
 424 }
 425
 426 static struct snd_jack_kctl * snd_jack_kctl_new(struct snd_card *card, const char *name, unsigned int mask)
 427 {
 428         struct snd_kcontrol *kctl;
 429         struct snd_jack_kctl *jack_kctl;
 430         int err;
 431
 432         kctl = snd_kctl_jack_new(name, card);
 433         if (!kctl)
 434                 return NULL;
 435
 436         err = snd_ctl_add(card, kctl);
 437         if (err < 0)
 438                 return NULL;
 439
 440         jack_kctl = kzalloc(sizeof(*jack_kctl), GFP_KERNEL);
 441
 442         if (!jack_kctl)
 443                 goto error;
 444
 445         jack_kctl->kctl = kctl;
 446         jack_kctl->mask_bits = mask;
 447
 448         kctl->private_data = jack_kctl;
 449         kctl->private_free = snd_jack_kctl_private_free;
 450
 451         return jack_kctl;
 452 error:
 453         snd_ctl_free_one(kctl);
 454         return NULL;
 455 }
 456
 457 /**
 458  * snd_jack_add_new_kctl - Create a new snd_jack_kctl and add it to jack
 459  * @jack:  the jack instance which the kctl will attaching to
 460  * @name:  the name for the snd_kcontrol object
 461  * @mask:  a bitmask of enum snd_jack_type values that can be detected
 462  *         by this snd_jack_kctl object.
 463  *
 464  * Creates a new snd_kcontrol object and adds it to the jack kctl_list.
 465  *
 466  * Return: Zero if successful, or a negative error code on failure.
 467  */
 468 int snd_jack_add_new_kctl(struct snd_jack *jack, const char * name, int mask)
 469 {
 470         struct snd_jack_kctl *jack_kctl;
 471
 472         jack_kctl = snd_jack_kctl_new(jack->card, name, mask);
 473         if (!jack_kctl)
 474                 return -ENOMEM;
 475
 476         snd_jack_kctl_add(jack, jack_kctl);
 477         return 0;
 478 }
 479 EXPORT_SYMBOL(snd_jack_add_new_kctl);
 480
 481 /**
 482  * snd_jack_new - Create a new jack
 483  * @card:  the card instance
 484  * @id:    an identifying string for this jack
 485  * @type:  a bitmask of enum snd_jack_type values that can be detected by
 486  *         this jack
 487  * @jjack: Used to provide the allocated jack object to the caller.
 488  * @initial_kctl: if true, create a kcontrol and add it to the jack list.
 489  * @phantom_jack: Don't create a input device for phantom jacks.
 490  *
 491  * Creates a new jack object.
 492  *
 493  * Return: Zero if successful, or a negative error code on failure.
 494  * On success @jjack will be initialised.
 495  */
 496 int snd_jack_new(struct snd_card *card, const char *id, int type,
 497                  struct snd_jack **jjack, bool initial_kctl, bool phantom_jack)
 498 {
 499         struct snd_jack *jack;
 500         struct snd_jack_kctl *jack_kctl = NULL;
 501         int err;
 502         static const struct snd_device_ops ops = {
 503                 .dev_free = snd_jack_dev_free,
 504 #ifdef CONFIG_SND_JACK_INPUT_DEV
 505                 .dev_register = snd_jack_dev_register,
 506                 .dev_disconnect = snd_jack_dev_disconnect,
 507 #endif /* CONFIG_SND_JACK_INPUT_DEV */
 508         };
 509
 510         if (initial_kctl) {
 511                 jack_kctl = snd_jack_kctl_new(card, id, type);
 512                 if (!jack_kctl)
 513                         return -ENOMEM;
 514         }
 515
 516         jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
 517         if (jack == NULL)
 518                 return -ENOMEM;
 519
 520         jack->id = kstrdup(id, GFP_KERNEL);
 521         if (jack->id == NULL) {
 522                 kfree(jack);
 523                 return -ENOMEM;
 524         }
 525
 526 #ifdef CONFIG_SND_JACK_INPUT_DEV
 527         mutex_init(&jack->input_dev_lock);
 528
 529         /* don't create input device for phantom jack */
 530         if (!phantom_jack) {
 531                 int i;
 532
 533                 jack->input_dev = input_allocate_device();
 534                 if (jack->input_dev == NULL) {
 535                         err = -ENOMEM;
 536                         goto fail_input;
 537                 }
 538
 539                 jack->input_dev->phys = "ALSA";
 540
 541                 jack->type = type;
 542
 543                 for (i = 0; i < SND_JACK_SWITCH_TYPES; i++)
 544                         if (type & (1 << i))
 545                                 input_set_capability(jack->input_dev, EV_SW,
 546                                                      jack_switch_types[i]);
 547
 548         }
 549 #endif /* CONFIG_SND_JACK_INPUT_DEV */
 550
 551         err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
 552         if (err < 0)
 553                 goto fail_input;
 554
 555         jack->card = card;
 556         INIT_LIST_HEAD(&jack->kctl_list);
 557
 558         if (initial_kctl)
 559                 snd_jack_kctl_add(jack, jack_kctl);
 560
 561         *jjack = jack;
 562
 563         return 0;
 564
 565 fail_input:
 566 #ifdef CONFIG_SND_JACK_INPUT_DEV
 567         input_free_device(jack->input_dev);
 568 #endif
 569         kfree(jack->id);
 570         kfree(jack);
 571         return err;
 572 }
 573 EXPORT_SYMBOL(snd_jack_new);
 574
 575 #ifdef CONFIG_SND_JACK_INPUT_DEV
 576 /**
 577  * snd_jack_set_parent - Set the parent device for a jack
 578  *
 579  * @jack:   The jack to configure
 580  * @parent: The device to set as parent for the jack.
 581  *
 582  * Set the parent for the jack devices in the device tree.  This
 583  * function is only valid prior to registration of the jack.  If no
 584  * parent is configured then the parent device will be the sound card.
 585  */
 586 void snd_jack_set_parent(struct snd_jack *jack, struct device *parent)
 587 {
 588         WARN_ON(jack->registered);
 589         mutex_lock(&jack->input_dev_lock);
 590         if (!jack->input_dev) {
 591                 mutex_unlock(&jack->input_dev_lock);
 592                 return;
 593         }
 594
 595         jack->input_dev->dev.parent = parent;
 596         mutex_unlock(&jack->input_dev_lock);
 597 }
 598 EXPORT_SYMBOL(snd_jack_set_parent);
 599
 600 /**
 601  * snd_jack_set_key - Set a key mapping on a jack
 602  *
 603  * @jack:    The jack to configure
 604  * @type:    Jack report type for this key
 605  * @keytype: Input layer key type to be reported
 606  *
 607  * Map a SND_JACK_BTN_* button type to an input layer key, allowing
 608  * reporting of keys on accessories via the jack abstraction.  If no
 609  * mapping is provided but keys are enabled in the jack type then
 610  * BTN_n numeric buttons will be reported.
 611  *
 612  * If jacks are not reporting via the input API this call will have no
 613  * effect.
 614  *
 615  * Note that this is intended to be use by simple devices with small
 616  * numbers of keys that can be reported.  It is also possible to
 617  * access the input device directly - devices with complex input
 618  * capabilities on accessories should consider doing this rather than
 619  * using this abstraction.
 620  *
 621  * This function may only be called prior to registration of the jack.
 622  *
 623  * Return: Zero if successful, or a negative error code on failure.
 624  */
 625 int snd_jack_set_key(struct snd_jack *jack, enum snd_jack_types type,
 626                      int keytype)
 627 {
 628         int key = fls(SND_JACK_BTN_0) - fls(type);
 629
 630         WARN_ON(jack->registered);
 631
 632         if (!keytype || key >= ARRAY_SIZE(jack->key))
 633                 return -EINVAL;
 634
 635         jack->type |= type;
 636         jack->key[key] = keytype;
 637         return 0;
 638 }
 639 EXPORT_SYMBOL(snd_jack_set_key);
 640 #endif /* CONFIG_SND_JACK_INPUT_DEV */
 641
 642 /**
 643  * snd_jack_report - Report the current status of a jack
 644  * Note: This function uses mutexes and should be called from a
 645  * context which can sleep (such as a workqueue).
 646  *
 647  * @jack:   The jack to report status for
 648  * @status: The current status of the jack
 649  */
 650 void snd_jack_report(struct snd_jack *jack, int status)
 651 {
 652         struct snd_jack_kctl *jack_kctl;
 653         unsigned int mask_bits = 0;
 654 #ifdef CONFIG_SND_JACK_INPUT_DEV
 655         struct input_dev *idev;
 656         int i;
 657 #endif
 658
 659         if (!jack)
 660                 return;
 661
 662         jack->hw_status_cache = status;
 663
 664         list_for_each_entry(jack_kctl, &jack->kctl_list, list)
 665                 if (jack_kctl->sw_inject_enable)
 666                         mask_bits |= jack_kctl->mask_bits;
 667                 else
 668                         snd_kctl_jack_report(jack->card, jack_kctl->kctl,
 669                                              status & jack_kctl->mask_bits);
 670
 671 #ifdef CONFIG_SND_JACK_INPUT_DEV
 672         idev = input_get_device(jack->input_dev);
 673         if (!idev)
 674                 return;
 675
 676         for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
 677                 int testbit = ((SND_JACK_BTN_0 >> i) & ~mask_bits);
 678
 679                 if (jack->type & testbit)
 680                         input_report_key(idev, jack->key[i],
 681                                          status & testbit);
 682         }
 683
 684         for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) {
 685                 int testbit = ((1 << i) & ~mask_bits);
 686
 687                 if (jack->type & testbit)
 688                         input_report_switch(idev,
 689                                             jack_switch_types[i],
 690                                             status & testbit);
 691         }
 692
 693         input_sync(idev);
 694         input_put_device(idev);
 695 #endif /* CONFIG_SND_JACK_INPUT_DEV */
 696 }
 697 EXPORT_SYMBOL(snd_jack_report);