1 /* rc-main.c - Remote Controller core module
3 * Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #include <media/rc-core.h>
16 #include <linux/spinlock.h>
17 #include <linux/delay.h>
18 #include <linux/input.h>
19 #include <linux/slab.h>
20 #include <linux/device.h>
21 #include "rc-core-priv.h"
23 /* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */
24 #define IR_TAB_MIN_SIZE 256
25 #define IR_TAB_MAX_SIZE 8192
27 /* FIXME: IR_KEYPRESS_TIMEOUT should be protocol specific */
28 #define IR_KEYPRESS_TIMEOUT 250
30 /* Used to keep track of known keymaps */
31 static LIST_HEAD(rc_map_list);
32 static DEFINE_SPINLOCK(rc_map_lock);
34 static struct rc_map_list *seek_rc_map(const char *name)
36 struct rc_map_list *map = NULL;
38 spin_lock(&rc_map_lock);
39 list_for_each_entry(map, &rc_map_list, list) {
40 if (!strcmp(name, map->map.name)) {
41 spin_unlock(&rc_map_lock);
45 spin_unlock(&rc_map_lock);
50 struct rc_map *rc_map_get(const char *name)
53 struct rc_map_list *map;
55 map = seek_rc_map(name);
58 int rc = request_module(name);
60 printk(KERN_ERR "Couldn't load IR keymap %s\n", name);
63 msleep(20); /* Give some time for IR to register */
65 map = seek_rc_map(name);
69 printk(KERN_ERR "IR keymap %s not found\n", name);
73 printk(KERN_INFO "Registered IR keymap %s\n", map->map.name);
77 EXPORT_SYMBOL_GPL(rc_map_get);
79 int rc_map_register(struct rc_map_list *map)
81 spin_lock(&rc_map_lock);
82 list_add_tail(&map->list, &rc_map_list);
83 spin_unlock(&rc_map_lock);
86 EXPORT_SYMBOL_GPL(rc_map_register);
88 void rc_map_unregister(struct rc_map_list *map)
90 spin_lock(&rc_map_lock);
92 spin_unlock(&rc_map_lock);
94 EXPORT_SYMBOL_GPL(rc_map_unregister);
97 static struct rc_map_table empty[] = {
101 static struct rc_map_list empty_map = {
104 .size = ARRAY_SIZE(empty),
105 .rc_type = RC_TYPE_UNKNOWN, /* Legacy IR type */
106 .name = RC_MAP_EMPTY,
111 * ir_create_table() - initializes a scancode table
112 * @rc_map: the rc_map to initialize
113 * @name: name to assign to the table
114 * @rc_type: ir type to assign to the new table
115 * @size: initial size of the table
116 * @return: zero on success or a negative error code
118 * This routine will initialize the rc_map and will allocate
119 * memory to hold at least the specified number of elements.
121 static int ir_create_table(struct rc_map *rc_map,
122 const char *name, u64 rc_type, size_t size)
125 rc_map->rc_type = rc_type;
126 rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table));
127 rc_map->size = rc_map->alloc / sizeof(struct rc_map_table);
128 rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL);
132 IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n",
133 rc_map->size, rc_map->alloc);
138 * ir_free_table() - frees memory allocated by a scancode table
139 * @rc_map: the table whose mappings need to be freed
141 * This routine will free memory alloctaed for key mappings used by given
144 static void ir_free_table(struct rc_map *rc_map)
152 * ir_resize_table() - resizes a scancode table if necessary
153 * @rc_map: the rc_map to resize
154 * @gfp_flags: gfp flags to use when allocating memory
155 * @return: zero on success or a negative error code
157 * This routine will shrink the rc_map if it has lots of
158 * unused entries and grow it if it is full.
160 static int ir_resize_table(struct rc_map *rc_map, gfp_t gfp_flags)
162 unsigned int oldalloc = rc_map->alloc;
163 unsigned int newalloc = oldalloc;
164 struct rc_map_table *oldscan = rc_map->scan;
165 struct rc_map_table *newscan;
167 if (rc_map->size == rc_map->len) {
168 /* All entries in use -> grow keytable */
169 if (rc_map->alloc >= IR_TAB_MAX_SIZE)
173 IR_dprintk(1, "Growing table to %u bytes\n", newalloc);
176 if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) {
177 /* Less than 1/3 of entries in use -> shrink keytable */
179 IR_dprintk(1, "Shrinking table to %u bytes\n", newalloc);
182 if (newalloc == oldalloc)
185 newscan = kmalloc(newalloc, gfp_flags);
187 IR_dprintk(1, "Failed to kmalloc %u bytes\n", newalloc);
191 memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table));
192 rc_map->scan = newscan;
193 rc_map->alloc = newalloc;
194 rc_map->size = rc_map->alloc / sizeof(struct rc_map_table);
200 * ir_update_mapping() - set a keycode in the scancode->keycode table
201 * @dev: the struct rc_dev device descriptor
202 * @rc_map: scancode table to be adjusted
203 * @index: index of the mapping that needs to be updated
204 * @keycode: the desired keycode
205 * @return: previous keycode assigned to the mapping
207 * This routine is used to update scancode->keycode mapping at given
210 static unsigned int ir_update_mapping(struct rc_dev *dev,
211 struct rc_map *rc_map,
213 unsigned int new_keycode)
215 int old_keycode = rc_map->scan[index].keycode;
218 /* Did the user wish to remove the mapping? */
219 if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) {
220 IR_dprintk(1, "#%d: Deleting scan 0x%04x\n",
221 index, rc_map->scan[index].scancode);
223 memmove(&rc_map->scan[index], &rc_map->scan[index+ 1],
224 (rc_map->len - index) * sizeof(struct rc_map_table));
226 IR_dprintk(1, "#%d: %s scan 0x%04x with key 0x%04x\n",
228 old_keycode == KEY_RESERVED ? "New" : "Replacing",
229 rc_map->scan[index].scancode, new_keycode);
230 rc_map->scan[index].keycode = new_keycode;
231 __set_bit(new_keycode, dev->input_dev->keybit);
234 if (old_keycode != KEY_RESERVED) {
235 /* A previous mapping was updated... */
236 __clear_bit(old_keycode, dev->input_dev->keybit);
237 /* ... but another scancode might use the same keycode */
238 for (i = 0; i < rc_map->len; i++) {
239 if (rc_map->scan[i].keycode == old_keycode) {
240 __set_bit(old_keycode, dev->input_dev->keybit);
245 /* Possibly shrink the keytable, failure is not a problem */
246 ir_resize_table(rc_map, GFP_ATOMIC);
253 * ir_establish_scancode() - set a keycode in the scancode->keycode table
254 * @dev: the struct rc_dev device descriptor
255 * @rc_map: scancode table to be searched
256 * @scancode: the desired scancode
257 * @resize: controls whether we allowed to resize the table to
258 * accomodate not yet present scancodes
259 * @return: index of the mapping containing scancode in question
260 * or -1U in case of failure.
262 * This routine is used to locate given scancode in rc_map.
263 * If scancode is not yet present the routine will allocate a new slot
266 static unsigned int ir_establish_scancode(struct rc_dev *dev,
267 struct rc_map *rc_map,
268 unsigned int scancode,
274 * Unfortunately, some hardware-based IR decoders don't provide
275 * all bits for the complete IR code. In general, they provide only
276 * the command part of the IR code. Yet, as it is possible to replace
277 * the provided IR with another one, it is needed to allow loading
278 * IR tables from other remotes. So, we support specifying a mask to
279 * indicate the valid bits of the scancodes.
282 scancode &= dev->scanmask;
284 /* First check if we already have a mapping for this ir command */
285 for (i = 0; i < rc_map->len; i++) {
286 if (rc_map->scan[i].scancode == scancode)
289 /* Keytable is sorted from lowest to highest scancode */
290 if (rc_map->scan[i].scancode >= scancode)
294 /* No previous mapping found, we might need to grow the table */
295 if (rc_map->size == rc_map->len) {
296 if (!resize || ir_resize_table(rc_map, GFP_ATOMIC))
300 /* i is the proper index to insert our new keycode */
302 memmove(&rc_map->scan[i + 1], &rc_map->scan[i],
303 (rc_map->len - i) * sizeof(struct rc_map_table));
304 rc_map->scan[i].scancode = scancode;
305 rc_map->scan[i].keycode = KEY_RESERVED;
312 * ir_setkeycode() - set a keycode in the scancode->keycode table
313 * @idev: the struct input_dev device descriptor
314 * @scancode: the desired scancode
316 * @return: -EINVAL if the keycode could not be inserted, otherwise zero.
318 * This routine is used to handle evdev EVIOCSKEY ioctl.
320 static int ir_setkeycode(struct input_dev *idev,
321 const struct input_keymap_entry *ke,
322 unsigned int *old_keycode)
324 struct rc_dev *rdev = input_get_drvdata(idev);
325 struct rc_map *rc_map = &rdev->rc_map;
327 unsigned int scancode;
331 spin_lock_irqsave(&rc_map->lock, flags);
333 if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
335 if (index >= rc_map->len) {
340 retval = input_scancode_to_scalar(ke, &scancode);
344 index = ir_establish_scancode(rdev, rc_map, scancode, true);
345 if (index >= rc_map->len) {
351 *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode);
354 spin_unlock_irqrestore(&rc_map->lock, flags);
359 * ir_setkeytable() - sets several entries in the scancode->keycode table
360 * @dev: the struct rc_dev device descriptor
361 * @to: the struct rc_map to copy entries to
362 * @from: the struct rc_map to copy entries from
363 * @return: -ENOMEM if all keycodes could not be inserted, otherwise zero.
365 * This routine is used to handle table initialization.
367 static int ir_setkeytable(struct rc_dev *dev,
368 const struct rc_map *from)
370 struct rc_map *rc_map = &dev->rc_map;
371 unsigned int i, index;
374 rc = ir_create_table(rc_map, from->name,
375 from->rc_type, from->size);
379 IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n",
380 rc_map->size, rc_map->alloc);
382 for (i = 0; i < from->size; i++) {
383 index = ir_establish_scancode(dev, rc_map,
384 from->scan[i].scancode, false);
385 if (index >= rc_map->len) {
390 ir_update_mapping(dev, rc_map, index,
391 from->scan[i].keycode);
395 ir_free_table(rc_map);
401 * ir_lookup_by_scancode() - locate mapping by scancode
402 * @rc_map: the struct rc_map to search
403 * @scancode: scancode to look for in the table
404 * @return: index in the table, -1U if not found
406 * This routine performs binary search in RC keykeymap table for
409 static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map,
410 unsigned int scancode)
413 int end = rc_map->len - 1;
416 while (start <= end) {
417 mid = (start + end) / 2;
418 if (rc_map->scan[mid].scancode < scancode)
420 else if (rc_map->scan[mid].scancode > scancode)
430 * ir_getkeycode() - get a keycode from the scancode->keycode table
431 * @idev: the struct input_dev device descriptor
432 * @scancode: the desired scancode
433 * @keycode: used to return the keycode, if found, or KEY_RESERVED
434 * @return: always returns zero.
436 * This routine is used to handle evdev EVIOCGKEY ioctl.
438 static int ir_getkeycode(struct input_dev *idev,
439 struct input_keymap_entry *ke)
441 struct rc_dev *rdev = input_get_drvdata(idev);
442 struct rc_map *rc_map = &rdev->rc_map;
443 struct rc_map_table *entry;
446 unsigned int scancode;
449 spin_lock_irqsave(&rc_map->lock, flags);
451 if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
454 retval = input_scancode_to_scalar(ke, &scancode);
458 index = ir_lookup_by_scancode(rc_map, scancode);
461 if (index < rc_map->len) {
462 entry = &rc_map->scan[index];
465 ke->keycode = entry->keycode;
466 ke->len = sizeof(entry->scancode);
467 memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode));
469 } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) {
471 * We do not really know the valid range of scancodes
472 * so let's respond with KEY_RESERVED to anything we
473 * do not have mapping for [yet].
476 ke->keycode = KEY_RESERVED;
485 spin_unlock_irqrestore(&rc_map->lock, flags);
490 * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode
491 * @dev: the struct rc_dev descriptor of the device
492 * @scancode: the scancode to look for
493 * @return: the corresponding keycode, or KEY_RESERVED
495 * This routine is used by drivers which need to convert a scancode to a
496 * keycode. Normally it should not be used since drivers should have no
497 * interest in keycodes.
499 u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode)
501 struct rc_map *rc_map = &dev->rc_map;
502 unsigned int keycode;
506 spin_lock_irqsave(&rc_map->lock, flags);
508 index = ir_lookup_by_scancode(rc_map, scancode);
509 keycode = index < rc_map->len ?
510 rc_map->scan[index].keycode : KEY_RESERVED;
512 spin_unlock_irqrestore(&rc_map->lock, flags);
514 if (keycode != KEY_RESERVED)
515 IR_dprintk(1, "%s: scancode 0x%04x keycode 0x%02x\n",
516 dev->input_name, scancode, keycode);
520 EXPORT_SYMBOL_GPL(rc_g_keycode_from_table);
523 * ir_do_keyup() - internal function to signal the release of a keypress
524 * @dev: the struct rc_dev descriptor of the device
526 * This function is used internally to release a keypress, it must be
527 * called with keylock held.
529 static void ir_do_keyup(struct rc_dev *dev)
531 if (!dev->keypressed)
534 IR_dprintk(1, "keyup key 0x%04x\n", dev->last_keycode);
535 input_report_key(dev->input_dev, dev->last_keycode, 0);
536 input_sync(dev->input_dev);
537 dev->keypressed = false;
541 * rc_keyup() - signals the release of a keypress
542 * @dev: the struct rc_dev descriptor of the device
544 * This routine is used to signal that a key has been released on the
547 void rc_keyup(struct rc_dev *dev)
551 spin_lock_irqsave(&dev->keylock, flags);
553 spin_unlock_irqrestore(&dev->keylock, flags);
555 EXPORT_SYMBOL_GPL(rc_keyup);
558 * ir_timer_keyup() - generates a keyup event after a timeout
559 * @cookie: a pointer to the struct rc_dev for the device
561 * This routine will generate a keyup event some time after a keydown event
562 * is generated when no further activity has been detected.
564 static void ir_timer_keyup(unsigned long cookie)
566 struct rc_dev *dev = (struct rc_dev *)cookie;
570 * ir->keyup_jiffies is used to prevent a race condition if a
571 * hardware interrupt occurs at this point and the keyup timer
572 * event is moved further into the future as a result.
574 * The timer will then be reactivated and this function called
575 * again in the future. We need to exit gracefully in that case
576 * to allow the input subsystem to do its auto-repeat magic or
577 * a keyup event might follow immediately after the keydown.
579 spin_lock_irqsave(&dev->keylock, flags);
580 if (time_is_before_eq_jiffies(dev->keyup_jiffies))
582 spin_unlock_irqrestore(&dev->keylock, flags);
586 * rc_repeat() - signals that a key is still pressed
587 * @dev: the struct rc_dev descriptor of the device
589 * This routine is used by IR decoders when a repeat message which does
590 * not include the necessary bits to reproduce the scancode has been
593 void rc_repeat(struct rc_dev *dev)
597 spin_lock_irqsave(&dev->keylock, flags);
599 input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode);
601 if (!dev->keypressed)
604 dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT);
605 mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
608 spin_unlock_irqrestore(&dev->keylock, flags);
610 EXPORT_SYMBOL_GPL(rc_repeat);
613 * ir_do_keydown() - internal function to process a keypress
614 * @dev: the struct rc_dev descriptor of the device
615 * @scancode: the scancode of the keypress
616 * @keycode: the keycode of the keypress
617 * @toggle: the toggle value of the keypress
619 * This function is used internally to register a keypress, it must be
620 * called with keylock held.
622 static void ir_do_keydown(struct rc_dev *dev, int scancode,
623 u32 keycode, u8 toggle)
625 input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode);
628 if (dev->keypressed &&
629 dev->last_scancode == scancode &&
630 dev->last_toggle == toggle)
633 /* Release old keypress */
636 dev->last_scancode = scancode;
637 dev->last_toggle = toggle;
638 dev->last_keycode = keycode;
640 if (keycode == KEY_RESERVED)
643 /* Register a keypress */
644 dev->keypressed = true;
645 IR_dprintk(1, "%s: key down event, key 0x%04x, scancode 0x%04x\n",
646 dev->input_name, keycode, scancode);
647 input_report_key(dev->input_dev, dev->last_keycode, 1);
648 input_sync(dev->input_dev);
652 * rc_keydown() - generates input event for a key press
653 * @dev: the struct rc_dev descriptor of the device
654 * @scancode: the scancode that we're seeking
655 * @toggle: the toggle value (protocol dependent, if the protocol doesn't
656 * support toggle values, this should be set to zero)
658 * This routine is used to signal that a key has been pressed on the
661 void rc_keydown(struct rc_dev *dev, int scancode, u8 toggle)
664 u32 keycode = rc_g_keycode_from_table(dev, scancode);
666 spin_lock_irqsave(&dev->keylock, flags);
667 ir_do_keydown(dev, scancode, keycode, toggle);
669 if (dev->keypressed) {
670 dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT);
671 mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
673 spin_unlock_irqrestore(&dev->keylock, flags);
675 EXPORT_SYMBOL_GPL(rc_keydown);
678 * rc_keydown_notimeout() - generates input event for a key press without
679 * an automatic keyup event at a later time
680 * @dev: the struct rc_dev descriptor of the device
681 * @scancode: the scancode that we're seeking
682 * @toggle: the toggle value (protocol dependent, if the protocol doesn't
683 * support toggle values, this should be set to zero)
685 * This routine is used to signal that a key has been pressed on the
686 * remote control. The driver must manually call rc_keyup() at a later stage.
688 void rc_keydown_notimeout(struct rc_dev *dev, int scancode, u8 toggle)
691 u32 keycode = rc_g_keycode_from_table(dev, scancode);
693 spin_lock_irqsave(&dev->keylock, flags);
694 ir_do_keydown(dev, scancode, keycode, toggle);
695 spin_unlock_irqrestore(&dev->keylock, flags);
697 EXPORT_SYMBOL_GPL(rc_keydown_notimeout);
699 static int ir_open(struct input_dev *idev)
701 struct rc_dev *rdev = input_get_drvdata(idev);
703 return rdev->open(rdev);
706 static void ir_close(struct input_dev *idev)
708 struct rc_dev *rdev = input_get_drvdata(idev);
713 /* class for /sys/class/rc */
714 static char *ir_devnode(struct device *dev, mode_t *mode)
716 return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev));
719 static struct class ir_input_class = {
721 .devnode = ir_devnode,
728 { RC_TYPE_UNKNOWN, "unknown" },
729 { RC_TYPE_RC5, "rc-5" },
730 { RC_TYPE_NEC, "nec" },
731 { RC_TYPE_RC6, "rc-6" },
732 { RC_TYPE_JVC, "jvc" },
733 { RC_TYPE_SONY, "sony" },
734 { RC_TYPE_RC5_SZ, "rc-5-sz" },
735 { RC_TYPE_LIRC, "lirc" },
738 #define PROTO_NONE "none"
741 * show_protocols() - shows the current IR protocol(s)
742 * @device: the device descriptor
743 * @mattr: the device attribute struct (unused)
744 * @buf: a pointer to the output buffer
746 * This routine is a callback routine for input read the IR protocol type(s).
747 * it is trigged by reading /sys/class/rc/rc?/protocols.
748 * It returns the protocol names of supported protocols.
749 * Enabled protocols are printed in brackets.
751 static ssize_t show_protocols(struct device *device,
752 struct device_attribute *mattr, char *buf)
754 struct rc_dev *dev = to_rc_dev(device);
755 u64 allowed, enabled;
759 /* Device is being removed */
763 if (dev->driver_type == RC_DRIVER_SCANCODE) {
764 enabled = dev->rc_map.rc_type;
765 allowed = dev->allowed_protos;
767 enabled = dev->raw->enabled_protocols;
768 allowed = ir_raw_get_allowed_protocols();
771 IR_dprintk(1, "allowed - 0x%llx, enabled - 0x%llx\n",
775 for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
776 if (allowed & enabled & proto_names[i].type)
777 tmp += sprintf(tmp, "[%s] ", proto_names[i].name);
778 else if (allowed & proto_names[i].type)
779 tmp += sprintf(tmp, "%s ", proto_names[i].name);
785 return tmp + 1 - buf;
789 * store_protocols() - changes the current IR protocol(s)
790 * @device: the device descriptor
791 * @mattr: the device attribute struct (unused)
792 * @buf: a pointer to the input buffer
793 * @len: length of the input buffer
795 * This routine is for changing the IR protocol type.
796 * It is trigged by writing to /sys/class/rc/rc?/protocols.
797 * Writing "+proto" will add a protocol to the list of enabled protocols.
798 * Writing "-proto" will remove a protocol from the list of enabled protocols.
799 * Writing "proto" will enable only "proto".
800 * Writing "none" will disable all protocols.
801 * Returns -EINVAL if an invalid protocol combination or unknown protocol name
802 * is used, otherwise @len.
804 static ssize_t store_protocols(struct device *device,
805 struct device_attribute *mattr,
809 struct rc_dev *dev = to_rc_dev(device);
810 bool enable, disable;
814 int rc, i, count = 0;
817 /* Device is being removed */
821 if (dev->driver_type == RC_DRIVER_SCANCODE)
822 type = dev->rc_map.rc_type;
824 type = dev->raw->enabled_protocols;
826 IR_dprintk(1, "Protocol switching not supported\n");
830 while ((tmp = strsep((char **) &data, " \n")) != NULL) {
838 } else if (*tmp == '-') {
847 if (!enable && !disable && !strncasecmp(tmp, PROTO_NONE, sizeof(PROTO_NONE))) {
848 tmp += sizeof(PROTO_NONE);
852 for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
853 if (!strncasecmp(tmp, proto_names[i].name, strlen(proto_names[i].name))) {
854 tmp += strlen(proto_names[i].name);
855 mask = proto_names[i].type;
859 if (i == ARRAY_SIZE(proto_names)) {
860 IR_dprintk(1, "Unknown protocol: '%s'\n", tmp);
875 IR_dprintk(1, "Protocol not specified\n");
879 if (dev->change_protocol) {
880 rc = dev->change_protocol(dev, type);
882 IR_dprintk(1, "Error setting protocols to 0x%llx\n",
888 if (dev->driver_type == RC_DRIVER_SCANCODE) {
889 spin_lock_irqsave(&dev->rc_map.lock, flags);
890 dev->rc_map.rc_type = type;
891 spin_unlock_irqrestore(&dev->rc_map.lock, flags);
893 dev->raw->enabled_protocols = type;
896 IR_dprintk(1, "Current protocol(s): 0x%llx\n",
902 static void rc_dev_release(struct device *device)
904 struct rc_dev *dev = to_rc_dev(device);
907 module_put(THIS_MODULE);
910 #define ADD_HOTPLUG_VAR(fmt, val...) \
912 int err = add_uevent_var(env, fmt, val); \
917 static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env)
919 struct rc_dev *dev = to_rc_dev(device);
921 if (dev->rc_map.name)
922 ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name);
923 if (dev->driver_name)
924 ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name);
930 * Static device attribute struct with the sysfs attributes for IR's
932 static DEVICE_ATTR(protocols, S_IRUGO | S_IWUSR,
933 show_protocols, store_protocols);
935 static struct attribute *rc_dev_attrs[] = {
936 &dev_attr_protocols.attr,
940 static struct attribute_group rc_dev_attr_grp = {
941 .attrs = rc_dev_attrs,
944 static const struct attribute_group *rc_dev_attr_groups[] = {
949 static struct device_type rc_dev_type = {
950 .groups = rc_dev_attr_groups,
951 .release = rc_dev_release,
952 .uevent = rc_dev_uevent,
955 struct rc_dev *rc_allocate_device(void)
959 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
963 dev->input_dev = input_allocate_device();
964 if (!dev->input_dev) {
969 dev->input_dev->getkeycode_new = ir_getkeycode;
970 dev->input_dev->setkeycode_new = ir_setkeycode;
971 input_set_drvdata(dev->input_dev, dev);
973 spin_lock_init(&dev->rc_map.lock);
974 spin_lock_init(&dev->keylock);
975 setup_timer(&dev->timer_keyup, ir_timer_keyup, (unsigned long)dev);
977 dev->dev.type = &rc_dev_type;
978 dev->dev.class = &ir_input_class;
979 device_initialize(&dev->dev);
981 __module_get(THIS_MODULE);
984 EXPORT_SYMBOL_GPL(rc_allocate_device);
986 void rc_free_device(struct rc_dev *dev)
989 input_free_device(dev->input_dev);
990 put_device(&dev->dev);
993 EXPORT_SYMBOL_GPL(rc_free_device);
995 int rc_register_device(struct rc_dev *dev)
997 static atomic_t devno = ATOMIC_INIT(0);
998 struct rc_map *rc_map;
1002 if (!dev || !dev->map_name)
1005 rc_map = rc_map_get(dev->map_name);
1007 rc_map = rc_map_get(RC_MAP_EMPTY);
1008 if (!rc_map || !rc_map->scan || rc_map->size == 0)
1011 set_bit(EV_KEY, dev->input_dev->evbit);
1012 set_bit(EV_REP, dev->input_dev->evbit);
1013 set_bit(EV_MSC, dev->input_dev->evbit);
1014 set_bit(MSC_SCAN, dev->input_dev->mscbit);
1016 dev->input_dev->open = ir_open;
1018 dev->input_dev->close = ir_close;
1020 dev->devno = (unsigned long)(atomic_inc_return(&devno) - 1);
1021 dev_set_name(&dev->dev, "rc%ld", dev->devno);
1022 dev_set_drvdata(&dev->dev, dev);
1023 rc = device_add(&dev->dev);
1027 rc = ir_setkeytable(dev, rc_map);
1031 dev->input_dev->dev.parent = &dev->dev;
1032 memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id));
1033 dev->input_dev->phys = dev->input_phys;
1034 dev->input_dev->name = dev->input_name;
1035 rc = input_register_device(dev->input_dev);
1040 * Default delay of 250ms is too short for some protocols, expecially
1041 * since the timeout is currently set to 250ms. Increase it to 500ms,
1042 * to avoid wrong repetition of the keycodes. Note that this must be
1043 * set after the call to input_register_device().
1045 dev->input_dev->rep[REP_DELAY] = 500;
1047 path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
1048 printk(KERN_INFO "%s: %s as %s\n",
1049 dev_name(&dev->dev),
1050 dev->input_name ? dev->input_name : "Unspecified device",
1051 path ? path : "N/A");
1054 if (dev->driver_type == RC_DRIVER_IR_RAW) {
1055 rc = ir_raw_event_register(dev);
1060 if (dev->change_protocol) {
1061 rc = dev->change_protocol(dev, rc_map->rc_type);
1066 IR_dprintk(1, "Registered rc%ld (driver: %s, remote: %s, mode %s)\n",
1068 dev->driver_name ? dev->driver_name : "unknown",
1069 rc_map->name ? rc_map->name : "unknown",
1070 dev->driver_type == RC_DRIVER_IR_RAW ? "raw" : "cooked");
1075 if (dev->driver_type == RC_DRIVER_IR_RAW)
1076 ir_raw_event_unregister(dev);
1078 input_unregister_device(dev->input_dev);
1079 dev->input_dev = NULL;
1081 ir_free_table(&dev->rc_map);
1083 device_del(&dev->dev);
1086 EXPORT_SYMBOL_GPL(rc_register_device);
1088 void rc_unregister_device(struct rc_dev *dev)
1093 del_timer_sync(&dev->timer_keyup);
1095 if (dev->driver_type == RC_DRIVER_IR_RAW)
1096 ir_raw_event_unregister(dev);
1098 input_unregister_device(dev->input_dev);
1099 dev->input_dev = NULL;
1101 ir_free_table(&dev->rc_map);
1102 IR_dprintk(1, "Freed keycode table\n");
1104 device_unregister(&dev->dev);
1106 EXPORT_SYMBOL_GPL(rc_unregister_device);
1109 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
1112 static int __init rc_core_init(void)
1114 int rc = class_register(&ir_input_class);
1116 printk(KERN_ERR "rc_core: unable to register rc class\n");
1120 /* Initialize/load the decoders/keymap code that will be used */
1122 rc_map_register(&empty_map);
1127 static void __exit rc_core_exit(void)
1129 class_unregister(&ir_input_class);
1130 rc_map_unregister(&empty_map);
1133 module_init(rc_core_init);
1134 module_exit(rc_core_exit);
1136 int rc_core_debug; /* ir_debug level (0,1,2) */
1137 EXPORT_SYMBOL_GPL(rc_core_debug);
1138 module_param_named(debug, rc_core_debug, int, 0644);
1140 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
1141 MODULE_LICENSE("GPL");