1 // SPDX-License-Identifier: GPL-2.0
2 // rc-main.c - Remote Controller core module
4 // Copyright (C) 2009-2010 by Mauro Carvalho Chehab
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8 #include <media/rc-core.h>
9 #include <linux/bsearch.h>
10 #include <linux/spinlock.h>
11 #include <linux/delay.h>
12 #include <linux/input.h>
13 #include <linux/leds.h>
14 #include <linux/slab.h>
15 #include <linux/idr.h>
16 #include <linux/device.h>
17 #include <linux/module.h>
18 #include "rc-core-priv.h"
20 /* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */
21 #define IR_TAB_MIN_SIZE 256
22 #define IR_TAB_MAX_SIZE 8192
26 unsigned int repeat_period;
27 unsigned int scancode_bits;
29 [RC_PROTO_UNKNOWN] = { .name = "unknown", .repeat_period = 125 },
30 [RC_PROTO_OTHER] = { .name = "other", .repeat_period = 125 },
31 [RC_PROTO_RC5] = { .name = "rc-5",
32 .scancode_bits = 0x1f7f, .repeat_period = 114 },
33 [RC_PROTO_RC5X_20] = { .name = "rc-5x-20",
34 .scancode_bits = 0x1f7f3f, .repeat_period = 114 },
35 [RC_PROTO_RC5_SZ] = { .name = "rc-5-sz",
36 .scancode_bits = 0x2fff, .repeat_period = 114 },
37 [RC_PROTO_JVC] = { .name = "jvc",
38 .scancode_bits = 0xffff, .repeat_period = 125 },
39 [RC_PROTO_SONY12] = { .name = "sony-12",
40 .scancode_bits = 0x1f007f, .repeat_period = 100 },
41 [RC_PROTO_SONY15] = { .name = "sony-15",
42 .scancode_bits = 0xff007f, .repeat_period = 100 },
43 [RC_PROTO_SONY20] = { .name = "sony-20",
44 .scancode_bits = 0x1fff7f, .repeat_period = 100 },
45 [RC_PROTO_NEC] = { .name = "nec",
46 .scancode_bits = 0xffff, .repeat_period = 110 },
47 [RC_PROTO_NECX] = { .name = "nec-x",
48 .scancode_bits = 0xffffff, .repeat_period = 110 },
49 [RC_PROTO_NEC32] = { .name = "nec-32",
50 .scancode_bits = 0xffffffff, .repeat_period = 110 },
51 [RC_PROTO_SANYO] = { .name = "sanyo",
52 .scancode_bits = 0x1fffff, .repeat_period = 125 },
53 [RC_PROTO_MCIR2_KBD] = { .name = "mcir2-kbd",
54 .scancode_bits = 0xffffff, .repeat_period = 100 },
55 [RC_PROTO_MCIR2_MSE] = { .name = "mcir2-mse",
56 .scancode_bits = 0x1fffff, .repeat_period = 100 },
57 [RC_PROTO_RC6_0] = { .name = "rc-6-0",
58 .scancode_bits = 0xffff, .repeat_period = 114 },
59 [RC_PROTO_RC6_6A_20] = { .name = "rc-6-6a-20",
60 .scancode_bits = 0xfffff, .repeat_period = 114 },
61 [RC_PROTO_RC6_6A_24] = { .name = "rc-6-6a-24",
62 .scancode_bits = 0xffffff, .repeat_period = 114 },
63 [RC_PROTO_RC6_6A_32] = { .name = "rc-6-6a-32",
64 .scancode_bits = 0xffffffff, .repeat_period = 114 },
65 [RC_PROTO_RC6_MCE] = { .name = "rc-6-mce",
66 .scancode_bits = 0xffff7fff, .repeat_period = 114 },
67 [RC_PROTO_SHARP] = { .name = "sharp",
68 .scancode_bits = 0x1fff, .repeat_period = 125 },
69 [RC_PROTO_XMP] = { .name = "xmp", .repeat_period = 125 },
70 [RC_PROTO_CEC] = { .name = "cec", .repeat_period = 0 },
71 [RC_PROTO_IMON] = { .name = "imon",
72 .scancode_bits = 0x7fffffff, .repeat_period = 114 },
73 [RC_PROTO_RCMM12] = { .name = "rc-mm-12",
74 .scancode_bits = 0x00000fff, .repeat_period = 114 },
75 [RC_PROTO_RCMM24] = { .name = "rc-mm-24",
76 .scancode_bits = 0x00ffffff, .repeat_period = 114 },
77 [RC_PROTO_RCMM32] = { .name = "rc-mm-32",
78 .scancode_bits = 0xffffffff, .repeat_period = 114 },
79 [RC_PROTO_XBOX_DVD] = { .name = "xbox-dvd", .repeat_period = 64 },
82 /* Used to keep track of known keymaps */
83 static LIST_HEAD(rc_map_list);
84 static DEFINE_SPINLOCK(rc_map_lock);
85 static struct led_trigger *led_feedback;
87 /* Used to keep track of rc devices */
88 static DEFINE_IDA(rc_ida);
90 static struct rc_map_list *seek_rc_map(const char *name)
92 struct rc_map_list *map = NULL;
94 spin_lock(&rc_map_lock);
95 list_for_each_entry(map, &rc_map_list, list) {
96 if (!strcmp(name, map->map.name)) {
97 spin_unlock(&rc_map_lock);
101 spin_unlock(&rc_map_lock);
106 struct rc_map *rc_map_get(const char *name)
109 struct rc_map_list *map;
111 map = seek_rc_map(name);
112 #ifdef CONFIG_MODULES
114 int rc = request_module("%s", name);
116 pr_err("Couldn't load IR keymap %s\n", name);
119 msleep(20); /* Give some time for IR to register */
121 map = seek_rc_map(name);
125 pr_err("IR keymap %s not found\n", name);
129 printk(KERN_INFO "Registered IR keymap %s\n", map->map.name);
133 EXPORT_SYMBOL_GPL(rc_map_get);
135 int rc_map_register(struct rc_map_list *map)
137 spin_lock(&rc_map_lock);
138 list_add_tail(&map->list, &rc_map_list);
139 spin_unlock(&rc_map_lock);
142 EXPORT_SYMBOL_GPL(rc_map_register);
144 void rc_map_unregister(struct rc_map_list *map)
146 spin_lock(&rc_map_lock);
147 list_del(&map->list);
148 spin_unlock(&rc_map_lock);
150 EXPORT_SYMBOL_GPL(rc_map_unregister);
153 static struct rc_map_table empty[] = {
154 { 0x2a, KEY_COFFEE },
157 static struct rc_map_list empty_map = {
160 .size = ARRAY_SIZE(empty),
161 .rc_proto = RC_PROTO_UNKNOWN, /* Legacy IR type */
162 .name = RC_MAP_EMPTY,
167 * scancode_to_u64() - converts scancode in &struct input_keymap_entry
168 * @ke: keymap entry containing scancode to be converted.
169 * @scancode: pointer to the location where converted scancode should
172 * This function is a version of input_scancode_to_scalar specialized for
175 static int scancode_to_u64(const struct input_keymap_entry *ke, u64 *scancode)
179 *scancode = *((u8 *)ke->scancode);
183 *scancode = *((u16 *)ke->scancode);
187 *scancode = *((u32 *)ke->scancode);
191 *scancode = *((u64 *)ke->scancode);
202 * ir_create_table() - initializes a scancode table
203 * @dev: the rc_dev device
204 * @rc_map: the rc_map to initialize
205 * @name: name to assign to the table
206 * @rc_proto: ir type to assign to the new table
207 * @size: initial size of the table
209 * This routine will initialize the rc_map and will allocate
210 * memory to hold at least the specified number of elements.
212 * return: zero on success or a negative error code
214 static int ir_create_table(struct rc_dev *dev, struct rc_map *rc_map,
215 const char *name, u64 rc_proto, size_t size)
217 rc_map->name = kstrdup(name, GFP_KERNEL);
220 rc_map->rc_proto = rc_proto;
221 rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table));
222 rc_map->size = rc_map->alloc / sizeof(struct rc_map_table);
223 rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL);
230 dev_dbg(&dev->dev, "Allocated space for %u keycode entries (%u bytes)\n",
231 rc_map->size, rc_map->alloc);
236 * ir_free_table() - frees memory allocated by a scancode table
237 * @rc_map: the table whose mappings need to be freed
239 * This routine will free memory alloctaed for key mappings used by given
242 static void ir_free_table(struct rc_map *rc_map)
252 * ir_resize_table() - resizes a scancode table if necessary
253 * @dev: the rc_dev device
254 * @rc_map: the rc_map to resize
255 * @gfp_flags: gfp flags to use when allocating memory
257 * This routine will shrink the rc_map if it has lots of
258 * unused entries and grow it if it is full.
260 * return: zero on success or a negative error code
262 static int ir_resize_table(struct rc_dev *dev, struct rc_map *rc_map,
265 unsigned int oldalloc = rc_map->alloc;
266 unsigned int newalloc = oldalloc;
267 struct rc_map_table *oldscan = rc_map->scan;
268 struct rc_map_table *newscan;
270 if (rc_map->size == rc_map->len) {
271 /* All entries in use -> grow keytable */
272 if (rc_map->alloc >= IR_TAB_MAX_SIZE)
276 dev_dbg(&dev->dev, "Growing table to %u bytes\n", newalloc);
279 if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) {
280 /* Less than 1/3 of entries in use -> shrink keytable */
282 dev_dbg(&dev->dev, "Shrinking table to %u bytes\n", newalloc);
285 if (newalloc == oldalloc)
288 newscan = kmalloc(newalloc, gfp_flags);
292 memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table));
293 rc_map->scan = newscan;
294 rc_map->alloc = newalloc;
295 rc_map->size = rc_map->alloc / sizeof(struct rc_map_table);
301 * ir_update_mapping() - set a keycode in the scancode->keycode table
302 * @dev: the struct rc_dev device descriptor
303 * @rc_map: scancode table to be adjusted
304 * @index: index of the mapping that needs to be updated
305 * @new_keycode: the desired keycode
307 * This routine is used to update scancode->keycode mapping at given
310 * return: previous keycode assigned to the mapping
313 static unsigned int ir_update_mapping(struct rc_dev *dev,
314 struct rc_map *rc_map,
316 unsigned int new_keycode)
318 int old_keycode = rc_map->scan[index].keycode;
321 /* Did the user wish to remove the mapping? */
322 if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) {
323 dev_dbg(&dev->dev, "#%d: Deleting scan 0x%04llx\n",
324 index, rc_map->scan[index].scancode);
326 memmove(&rc_map->scan[index], &rc_map->scan[index+ 1],
327 (rc_map->len - index) * sizeof(struct rc_map_table));
329 dev_dbg(&dev->dev, "#%d: %s scan 0x%04llx with key 0x%04x\n",
331 old_keycode == KEY_RESERVED ? "New" : "Replacing",
332 rc_map->scan[index].scancode, new_keycode);
333 rc_map->scan[index].keycode = new_keycode;
334 __set_bit(new_keycode, dev->input_dev->keybit);
337 if (old_keycode != KEY_RESERVED) {
338 /* A previous mapping was updated... */
339 __clear_bit(old_keycode, dev->input_dev->keybit);
340 /* ... but another scancode might use the same keycode */
341 for (i = 0; i < rc_map->len; i++) {
342 if (rc_map->scan[i].keycode == old_keycode) {
343 __set_bit(old_keycode, dev->input_dev->keybit);
348 /* Possibly shrink the keytable, failure is not a problem */
349 ir_resize_table(dev, rc_map, GFP_ATOMIC);
356 * ir_establish_scancode() - set a keycode in the scancode->keycode table
357 * @dev: the struct rc_dev device descriptor
358 * @rc_map: scancode table to be searched
359 * @scancode: the desired scancode
360 * @resize: controls whether we allowed to resize the table to
361 * accommodate not yet present scancodes
363 * This routine is used to locate given scancode in rc_map.
364 * If scancode is not yet present the routine will allocate a new slot
367 * return: index of the mapping containing scancode in question
368 * or -1U in case of failure.
370 static unsigned int ir_establish_scancode(struct rc_dev *dev,
371 struct rc_map *rc_map,
372 u64 scancode, bool resize)
377 * Unfortunately, some hardware-based IR decoders don't provide
378 * all bits for the complete IR code. In general, they provide only
379 * the command part of the IR code. Yet, as it is possible to replace
380 * the provided IR with another one, it is needed to allow loading
381 * IR tables from other remotes. So, we support specifying a mask to
382 * indicate the valid bits of the scancodes.
384 if (dev->scancode_mask)
385 scancode &= dev->scancode_mask;
387 /* First check if we already have a mapping for this ir command */
388 for (i = 0; i < rc_map->len; i++) {
389 if (rc_map->scan[i].scancode == scancode)
392 /* Keytable is sorted from lowest to highest scancode */
393 if (rc_map->scan[i].scancode >= scancode)
397 /* No previous mapping found, we might need to grow the table */
398 if (rc_map->size == rc_map->len) {
399 if (!resize || ir_resize_table(dev, rc_map, GFP_ATOMIC))
403 /* i is the proper index to insert our new keycode */
405 memmove(&rc_map->scan[i + 1], &rc_map->scan[i],
406 (rc_map->len - i) * sizeof(struct rc_map_table));
407 rc_map->scan[i].scancode = scancode;
408 rc_map->scan[i].keycode = KEY_RESERVED;
415 * ir_setkeycode() - set a keycode in the scancode->keycode table
416 * @idev: the struct input_dev device descriptor
417 * @ke: Input keymap entry
418 * @old_keycode: result
420 * This routine is used to handle evdev EVIOCSKEY ioctl.
422 * return: -EINVAL if the keycode could not be inserted, otherwise zero.
424 static int ir_setkeycode(struct input_dev *idev,
425 const struct input_keymap_entry *ke,
426 unsigned int *old_keycode)
428 struct rc_dev *rdev = input_get_drvdata(idev);
429 struct rc_map *rc_map = &rdev->rc_map;
435 spin_lock_irqsave(&rc_map->lock, flags);
437 if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
439 if (index >= rc_map->len) {
444 retval = scancode_to_u64(ke, &scancode);
448 index = ir_establish_scancode(rdev, rc_map, scancode, true);
449 if (index >= rc_map->len) {
455 *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode);
458 spin_unlock_irqrestore(&rc_map->lock, flags);
463 * ir_setkeytable() - sets several entries in the scancode->keycode table
464 * @dev: the struct rc_dev device descriptor
465 * @from: the struct rc_map to copy entries from
467 * This routine is used to handle table initialization.
469 * return: -ENOMEM if all keycodes could not be inserted, otherwise zero.
471 static int ir_setkeytable(struct rc_dev *dev, const struct rc_map *from)
473 struct rc_map *rc_map = &dev->rc_map;
474 unsigned int i, index;
477 rc = ir_create_table(dev, rc_map, from->name, from->rc_proto,
482 for (i = 0; i < from->size; i++) {
483 index = ir_establish_scancode(dev, rc_map,
484 from->scan[i].scancode, false);
485 if (index >= rc_map->len) {
490 ir_update_mapping(dev, rc_map, index,
491 from->scan[i].keycode);
495 ir_free_table(rc_map);
500 static int rc_map_cmp(const void *key, const void *elt)
502 const u64 *scancode = key;
503 const struct rc_map_table *e = elt;
505 if (*scancode < e->scancode)
507 else if (*scancode > e->scancode)
513 * ir_lookup_by_scancode() - locate mapping by scancode
514 * @rc_map: the struct rc_map to search
515 * @scancode: scancode to look for in the table
517 * This routine performs binary search in RC keykeymap table for
520 * return: index in the table, -1U if not found
522 static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map,
525 struct rc_map_table *res;
527 res = bsearch(&scancode, rc_map->scan, rc_map->len,
528 sizeof(struct rc_map_table), rc_map_cmp);
532 return res - rc_map->scan;
536 * ir_getkeycode() - get a keycode from the scancode->keycode table
537 * @idev: the struct input_dev device descriptor
538 * @ke: Input keymap entry
540 * This routine is used to handle evdev EVIOCGKEY ioctl.
542 * return: always returns zero.
544 static int ir_getkeycode(struct input_dev *idev,
545 struct input_keymap_entry *ke)
547 struct rc_dev *rdev = input_get_drvdata(idev);
548 struct rc_map *rc_map = &rdev->rc_map;
549 struct rc_map_table *entry;
555 spin_lock_irqsave(&rc_map->lock, flags);
557 if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
560 retval = scancode_to_u64(ke, &scancode);
564 index = ir_lookup_by_scancode(rc_map, scancode);
567 if (index < rc_map->len) {
568 entry = &rc_map->scan[index];
571 ke->keycode = entry->keycode;
572 ke->len = sizeof(entry->scancode);
573 memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode));
574 } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) {
576 * We do not really know the valid range of scancodes
577 * so let's respond with KEY_RESERVED to anything we
578 * do not have mapping for [yet].
581 ke->keycode = KEY_RESERVED;
590 spin_unlock_irqrestore(&rc_map->lock, flags);
595 * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode
596 * @dev: the struct rc_dev descriptor of the device
597 * @scancode: the scancode to look for
599 * This routine is used by drivers which need to convert a scancode to a
600 * keycode. Normally it should not be used since drivers should have no
601 * interest in keycodes.
603 * return: the corresponding keycode, or KEY_RESERVED
605 u32 rc_g_keycode_from_table(struct rc_dev *dev, u64 scancode)
607 struct rc_map *rc_map = &dev->rc_map;
608 unsigned int keycode;
612 spin_lock_irqsave(&rc_map->lock, flags);
614 index = ir_lookup_by_scancode(rc_map, scancode);
615 keycode = index < rc_map->len ?
616 rc_map->scan[index].keycode : KEY_RESERVED;
618 spin_unlock_irqrestore(&rc_map->lock, flags);
620 if (keycode != KEY_RESERVED)
621 dev_dbg(&dev->dev, "%s: scancode 0x%04llx keycode 0x%02x\n",
622 dev->device_name, scancode, keycode);
626 EXPORT_SYMBOL_GPL(rc_g_keycode_from_table);
629 * ir_do_keyup() - internal function to signal the release of a keypress
630 * @dev: the struct rc_dev descriptor of the device
631 * @sync: whether or not to call input_sync
633 * This function is used internally to release a keypress, it must be
634 * called with keylock held.
636 static void ir_do_keyup(struct rc_dev *dev, bool sync)
638 if (!dev->keypressed)
641 dev_dbg(&dev->dev, "keyup key 0x%04x\n", dev->last_keycode);
642 del_timer(&dev->timer_repeat);
643 input_report_key(dev->input_dev, dev->last_keycode, 0);
644 led_trigger_event(led_feedback, LED_OFF);
646 input_sync(dev->input_dev);
647 dev->keypressed = false;
651 * rc_keyup() - signals the release of a keypress
652 * @dev: the struct rc_dev descriptor of the device
654 * This routine is used to signal that a key has been released on the
657 void rc_keyup(struct rc_dev *dev)
661 spin_lock_irqsave(&dev->keylock, flags);
662 ir_do_keyup(dev, true);
663 spin_unlock_irqrestore(&dev->keylock, flags);
665 EXPORT_SYMBOL_GPL(rc_keyup);
668 * ir_timer_keyup() - generates a keyup event after a timeout
670 * @t: a pointer to the struct timer_list
672 * This routine will generate a keyup event some time after a keydown event
673 * is generated when no further activity has been detected.
675 static void ir_timer_keyup(struct timer_list *t)
677 struct rc_dev *dev = from_timer(dev, t, timer_keyup);
681 * ir->keyup_jiffies is used to prevent a race condition if a
682 * hardware interrupt occurs at this point and the keyup timer
683 * event is moved further into the future as a result.
685 * The timer will then be reactivated and this function called
686 * again in the future. We need to exit gracefully in that case
687 * to allow the input subsystem to do its auto-repeat magic or
688 * a keyup event might follow immediately after the keydown.
690 spin_lock_irqsave(&dev->keylock, flags);
691 if (time_is_before_eq_jiffies(dev->keyup_jiffies))
692 ir_do_keyup(dev, true);
693 spin_unlock_irqrestore(&dev->keylock, flags);
697 * ir_timer_repeat() - generates a repeat event after a timeout
699 * @t: a pointer to the struct timer_list
701 * This routine will generate a soft repeat event every REP_PERIOD
704 static void ir_timer_repeat(struct timer_list *t)
706 struct rc_dev *dev = from_timer(dev, t, timer_repeat);
707 struct input_dev *input = dev->input_dev;
710 spin_lock_irqsave(&dev->keylock, flags);
711 if (dev->keypressed) {
712 input_event(input, EV_KEY, dev->last_keycode, 2);
714 if (input->rep[REP_PERIOD])
715 mod_timer(&dev->timer_repeat, jiffies +
716 msecs_to_jiffies(input->rep[REP_PERIOD]));
718 spin_unlock_irqrestore(&dev->keylock, flags);
721 static unsigned int repeat_period(int protocol)
723 if (protocol >= ARRAY_SIZE(protocols))
726 return protocols[protocol].repeat_period;
730 * rc_repeat() - signals that a key is still pressed
731 * @dev: the struct rc_dev descriptor of the device
733 * This routine is used by IR decoders when a repeat message which does
734 * not include the necessary bits to reproduce the scancode has been
737 void rc_repeat(struct rc_dev *dev)
740 unsigned int timeout = nsecs_to_jiffies(dev->timeout) +
741 msecs_to_jiffies(repeat_period(dev->last_protocol));
742 struct lirc_scancode sc = {
743 .scancode = dev->last_scancode, .rc_proto = dev->last_protocol,
744 .keycode = dev->keypressed ? dev->last_keycode : KEY_RESERVED,
745 .flags = LIRC_SCANCODE_FLAG_REPEAT |
746 (dev->last_toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0)
749 if (dev->allowed_protocols != RC_PROTO_BIT_CEC)
750 ir_lirc_scancode_event(dev, &sc);
752 spin_lock_irqsave(&dev->keylock, flags);
754 if (dev->last_scancode <= U32_MAX) {
755 input_event(dev->input_dev, EV_MSC, MSC_SCAN,
757 input_sync(dev->input_dev);
760 if (dev->keypressed) {
761 dev->keyup_jiffies = jiffies + timeout;
762 mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
765 spin_unlock_irqrestore(&dev->keylock, flags);
767 EXPORT_SYMBOL_GPL(rc_repeat);
770 * ir_do_keydown() - internal function to process a keypress
771 * @dev: the struct rc_dev descriptor of the device
772 * @protocol: the protocol of the keypress
773 * @scancode: the scancode of the keypress
774 * @keycode: the keycode of the keypress
775 * @toggle: the toggle value of the keypress
777 * This function is used internally to register a keypress, it must be
778 * called with keylock held.
780 static void ir_do_keydown(struct rc_dev *dev, enum rc_proto protocol,
781 u64 scancode, u32 keycode, u8 toggle)
783 bool new_event = (!dev->keypressed ||
784 dev->last_protocol != protocol ||
785 dev->last_scancode != scancode ||
786 dev->last_toggle != toggle);
787 struct lirc_scancode sc = {
788 .scancode = scancode, .rc_proto = protocol,
789 .flags = toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0,
793 if (dev->allowed_protocols != RC_PROTO_BIT_CEC)
794 ir_lirc_scancode_event(dev, &sc);
796 if (new_event && dev->keypressed)
797 ir_do_keyup(dev, false);
799 if (scancode <= U32_MAX)
800 input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode);
802 dev->last_protocol = protocol;
803 dev->last_scancode = scancode;
804 dev->last_toggle = toggle;
805 dev->last_keycode = keycode;
807 if (new_event && keycode != KEY_RESERVED) {
808 /* Register a keypress */
809 dev->keypressed = true;
811 dev_dbg(&dev->dev, "%s: key down event, key 0x%04x, protocol 0x%04x, scancode 0x%08llx\n",
812 dev->device_name, keycode, protocol, scancode);
813 input_report_key(dev->input_dev, keycode, 1);
815 led_trigger_event(led_feedback, LED_FULL);
819 * For CEC, start sending repeat messages as soon as the first
820 * repeated message is sent, as long as REP_DELAY = 0 and REP_PERIOD
821 * is non-zero. Otherwise, the input layer will generate repeat
824 if (!new_event && keycode != KEY_RESERVED &&
825 dev->allowed_protocols == RC_PROTO_BIT_CEC &&
826 !timer_pending(&dev->timer_repeat) &&
827 dev->input_dev->rep[REP_PERIOD] &&
828 !dev->input_dev->rep[REP_DELAY]) {
829 input_event(dev->input_dev, EV_KEY, keycode, 2);
830 mod_timer(&dev->timer_repeat, jiffies +
831 msecs_to_jiffies(dev->input_dev->rep[REP_PERIOD]));
834 input_sync(dev->input_dev);
838 * rc_keydown() - generates input event for a key press
839 * @dev: the struct rc_dev descriptor of the device
840 * @protocol: the protocol for the keypress
841 * @scancode: the scancode for the keypress
842 * @toggle: the toggle value (protocol dependent, if the protocol doesn't
843 * support toggle values, this should be set to zero)
845 * This routine is used to signal that a key has been pressed on the
848 void rc_keydown(struct rc_dev *dev, enum rc_proto protocol, u64 scancode,
852 u32 keycode = rc_g_keycode_from_table(dev, scancode);
854 spin_lock_irqsave(&dev->keylock, flags);
855 ir_do_keydown(dev, protocol, scancode, keycode, toggle);
857 if (dev->keypressed) {
858 dev->keyup_jiffies = jiffies + nsecs_to_jiffies(dev->timeout) +
859 msecs_to_jiffies(repeat_period(protocol));
860 mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
862 spin_unlock_irqrestore(&dev->keylock, flags);
864 EXPORT_SYMBOL_GPL(rc_keydown);
867 * rc_keydown_notimeout() - generates input event for a key press without
868 * an automatic keyup event at a later time
869 * @dev: the struct rc_dev descriptor of the device
870 * @protocol: the protocol for the keypress
871 * @scancode: the scancode for the keypress
872 * @toggle: the toggle value (protocol dependent, if the protocol doesn't
873 * support toggle values, this should be set to zero)
875 * This routine is used to signal that a key has been pressed on the
876 * remote control. The driver must manually call rc_keyup() at a later stage.
878 void rc_keydown_notimeout(struct rc_dev *dev, enum rc_proto protocol,
879 u64 scancode, u8 toggle)
882 u32 keycode = rc_g_keycode_from_table(dev, scancode);
884 spin_lock_irqsave(&dev->keylock, flags);
885 ir_do_keydown(dev, protocol, scancode, keycode, toggle);
886 spin_unlock_irqrestore(&dev->keylock, flags);
888 EXPORT_SYMBOL_GPL(rc_keydown_notimeout);
891 * rc_validate_scancode() - checks that a scancode is valid for a protocol.
892 * For nec, it should do the opposite of ir_nec_bytes_to_scancode()
894 * @scancode: scancode
896 bool rc_validate_scancode(enum rc_proto proto, u32 scancode)
900 * NECX has a 16-bit address; if the lower 8 bits match the upper
901 * 8 bits inverted, then the address would match regular nec.
904 if ((((scancode >> 16) ^ ~(scancode >> 8)) & 0xff) == 0)
908 * NEC32 has a 16 bit address and 16 bit command. If the lower 8 bits
909 * of the command match the upper 8 bits inverted, then it would
910 * be either NEC or NECX.
913 if ((((scancode >> 8) ^ ~scancode) & 0xff) == 0)
917 * If the customer code (top 32-bit) is 0x800f, it is MCE else it
918 * is regular mode-6a 32 bit
920 case RC_PROTO_RC6_MCE:
921 if ((scancode & 0xffff0000) != 0x800f0000)
924 case RC_PROTO_RC6_6A_32:
925 if ((scancode & 0xffff0000) == 0x800f0000)
936 * rc_validate_filter() - checks that the scancode and mask are valid and
937 * provides sensible defaults
938 * @dev: the struct rc_dev descriptor of the device
939 * @filter: the scancode and mask
941 * return: 0 or -EINVAL if the filter is not valid
943 static int rc_validate_filter(struct rc_dev *dev,
944 struct rc_scancode_filter *filter)
946 u32 mask, s = filter->data;
947 enum rc_proto protocol = dev->wakeup_protocol;
949 if (protocol >= ARRAY_SIZE(protocols))
952 mask = protocols[protocol].scancode_bits;
954 if (!rc_validate_scancode(protocol, s))
957 filter->data &= mask;
958 filter->mask &= mask;
961 * If we have to raw encode the IR for wakeup, we cannot have a mask
963 if (dev->encode_wakeup && filter->mask != 0 && filter->mask != mask)
969 int rc_open(struct rc_dev *rdev)
976 mutex_lock(&rdev->lock);
978 if (!rdev->registered) {
981 if (!rdev->users++ && rdev->open)
982 rval = rdev->open(rdev);
988 mutex_unlock(&rdev->lock);
993 static int ir_open(struct input_dev *idev)
995 struct rc_dev *rdev = input_get_drvdata(idev);
997 return rc_open(rdev);
1000 void rc_close(struct rc_dev *rdev)
1003 mutex_lock(&rdev->lock);
1005 if (!--rdev->users && rdev->close && rdev->registered)
1008 mutex_unlock(&rdev->lock);
1012 static void ir_close(struct input_dev *idev)
1014 struct rc_dev *rdev = input_get_drvdata(idev);
1018 /* class for /sys/class/rc */
1019 static char *rc_devnode(struct device *dev, umode_t *mode)
1021 return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev));
1024 static struct class rc_class = {
1026 .devnode = rc_devnode,
1030 * These are the protocol textual descriptions that are
1031 * used by the sysfs protocols file. Note that the order
1032 * of the entries is relevant.
1034 static const struct {
1037 const char *module_name;
1039 { RC_PROTO_BIT_NONE, "none", NULL },
1040 { RC_PROTO_BIT_OTHER, "other", NULL },
1041 { RC_PROTO_BIT_UNKNOWN, "unknown", NULL },
1042 { RC_PROTO_BIT_RC5 |
1043 RC_PROTO_BIT_RC5X_20, "rc-5", "ir-rc5-decoder" },
1044 { RC_PROTO_BIT_NEC |
1046 RC_PROTO_BIT_NEC32, "nec", "ir-nec-decoder" },
1047 { RC_PROTO_BIT_RC6_0 |
1048 RC_PROTO_BIT_RC6_6A_20 |
1049 RC_PROTO_BIT_RC6_6A_24 |
1050 RC_PROTO_BIT_RC6_6A_32 |
1051 RC_PROTO_BIT_RC6_MCE, "rc-6", "ir-rc6-decoder" },
1052 { RC_PROTO_BIT_JVC, "jvc", "ir-jvc-decoder" },
1053 { RC_PROTO_BIT_SONY12 |
1054 RC_PROTO_BIT_SONY15 |
1055 RC_PROTO_BIT_SONY20, "sony", "ir-sony-decoder" },
1056 { RC_PROTO_BIT_RC5_SZ, "rc-5-sz", "ir-rc5-decoder" },
1057 { RC_PROTO_BIT_SANYO, "sanyo", "ir-sanyo-decoder" },
1058 { RC_PROTO_BIT_SHARP, "sharp", "ir-sharp-decoder" },
1059 { RC_PROTO_BIT_MCIR2_KBD |
1060 RC_PROTO_BIT_MCIR2_MSE, "mce_kbd", "ir-mce_kbd-decoder" },
1061 { RC_PROTO_BIT_XMP, "xmp", "ir-xmp-decoder" },
1062 { RC_PROTO_BIT_CEC, "cec", NULL },
1063 { RC_PROTO_BIT_IMON, "imon", "ir-imon-decoder" },
1064 { RC_PROTO_BIT_RCMM12 |
1065 RC_PROTO_BIT_RCMM24 |
1066 RC_PROTO_BIT_RCMM32, "rc-mm", "ir-rcmm-decoder" },
1067 { RC_PROTO_BIT_XBOX_DVD, "xbox-dvd", NULL },
1071 * struct rc_filter_attribute - Device attribute relating to a filter type.
1072 * @attr: Device attribute.
1073 * @type: Filter type.
1074 * @mask: false for filter value, true for filter mask.
1076 struct rc_filter_attribute {
1077 struct device_attribute attr;
1078 enum rc_filter_type type;
1081 #define to_rc_filter_attr(a) container_of(a, struct rc_filter_attribute, attr)
1083 #define RC_FILTER_ATTR(_name, _mode, _show, _store, _type, _mask) \
1084 struct rc_filter_attribute dev_attr_##_name = { \
1085 .attr = __ATTR(_name, _mode, _show, _store), \
1091 * show_protocols() - shows the current IR protocol(s)
1092 * @device: the device descriptor
1093 * @mattr: the device attribute struct
1094 * @buf: a pointer to the output buffer
1096 * This routine is a callback routine for input read the IR protocol type(s).
1097 * it is triggered by reading /sys/class/rc/rc?/protocols.
1098 * It returns the protocol names of supported protocols.
1099 * Enabled protocols are printed in brackets.
1101 * dev->lock is taken to guard against races between
1102 * store_protocols and show_protocols.
1104 static ssize_t show_protocols(struct device *device,
1105 struct device_attribute *mattr, char *buf)
1107 struct rc_dev *dev = to_rc_dev(device);
1108 u64 allowed, enabled;
1112 mutex_lock(&dev->lock);
1114 enabled = dev->enabled_protocols;
1115 allowed = dev->allowed_protocols;
1116 if (dev->raw && !allowed)
1117 allowed = ir_raw_get_allowed_protocols();
1119 mutex_unlock(&dev->lock);
1121 dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - 0x%llx\n",
1122 __func__, (long long)allowed, (long long)enabled);
1124 for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
1125 if (allowed & enabled & proto_names[i].type)
1126 tmp += sprintf(tmp, "[%s] ", proto_names[i].name);
1127 else if (allowed & proto_names[i].type)
1128 tmp += sprintf(tmp, "%s ", proto_names[i].name);
1130 if (allowed & proto_names[i].type)
1131 allowed &= ~proto_names[i].type;
1135 if (dev->driver_type == RC_DRIVER_IR_RAW)
1136 tmp += sprintf(tmp, "[lirc] ");
1143 return tmp + 1 - buf;
1147 * parse_protocol_change() - parses a protocol change request
1148 * @dev: rc_dev device
1149 * @protocols: pointer to the bitmask of current protocols
1150 * @buf: pointer to the buffer with a list of changes
1152 * Writing "+proto" will add a protocol to the protocol mask.
1153 * Writing "-proto" will remove a protocol from protocol mask.
1154 * Writing "proto" will enable only "proto".
1155 * Writing "none" will disable all protocols.
1156 * Returns the number of changes performed or a negative error code.
1158 static int parse_protocol_change(struct rc_dev *dev, u64 *protocols,
1163 bool enable, disable;
1167 while ((tmp = strsep((char **)&buf, " \n")) != NULL) {
1175 } else if (*tmp == '-') {
1184 for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
1185 if (!strcasecmp(tmp, proto_names[i].name)) {
1186 mask = proto_names[i].type;
1191 if (i == ARRAY_SIZE(proto_names)) {
1192 if (!strcasecmp(tmp, "lirc"))
1195 dev_dbg(&dev->dev, "Unknown protocol: '%s'\n",
1206 *protocols &= ~mask;
1212 dev_dbg(&dev->dev, "Protocol not specified\n");
1219 void ir_raw_load_modules(u64 *protocols)
1224 for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
1225 if (proto_names[i].type == RC_PROTO_BIT_NONE ||
1226 proto_names[i].type & (RC_PROTO_BIT_OTHER |
1227 RC_PROTO_BIT_UNKNOWN))
1230 available = ir_raw_get_allowed_protocols();
1231 if (!(*protocols & proto_names[i].type & ~available))
1234 if (!proto_names[i].module_name) {
1235 pr_err("Can't enable IR protocol %s\n",
1236 proto_names[i].name);
1237 *protocols &= ~proto_names[i].type;
1241 ret = request_module("%s", proto_names[i].module_name);
1243 pr_err("Couldn't load IR protocol module %s\n",
1244 proto_names[i].module_name);
1245 *protocols &= ~proto_names[i].type;
1249 available = ir_raw_get_allowed_protocols();
1250 if (!(*protocols & proto_names[i].type & ~available))
1253 pr_err("Loaded IR protocol module %s, but protocol %s still not available\n",
1254 proto_names[i].module_name,
1255 proto_names[i].name);
1256 *protocols &= ~proto_names[i].type;
1261 * store_protocols() - changes the current/wakeup IR protocol(s)
1262 * @device: the device descriptor
1263 * @mattr: the device attribute struct
1264 * @buf: a pointer to the input buffer
1265 * @len: length of the input buffer
1267 * This routine is for changing the IR protocol type.
1268 * It is triggered by writing to /sys/class/rc/rc?/[wakeup_]protocols.
1269 * See parse_protocol_change() for the valid commands.
1270 * Returns @len on success or a negative error code.
1272 * dev->lock is taken to guard against races between
1273 * store_protocols and show_protocols.
1275 static ssize_t store_protocols(struct device *device,
1276 struct device_attribute *mattr,
1277 const char *buf, size_t len)
1279 struct rc_dev *dev = to_rc_dev(device);
1280 u64 *current_protocols;
1281 struct rc_scancode_filter *filter;
1282 u64 old_protocols, new_protocols;
1285 dev_dbg(&dev->dev, "Normal protocol change requested\n");
1286 current_protocols = &dev->enabled_protocols;
1287 filter = &dev->scancode_filter;
1289 if (!dev->change_protocol) {
1290 dev_dbg(&dev->dev, "Protocol switching not supported\n");
1294 mutex_lock(&dev->lock);
1296 old_protocols = *current_protocols;
1297 new_protocols = old_protocols;
1298 rc = parse_protocol_change(dev, &new_protocols, buf);
1302 if (dev->driver_type == RC_DRIVER_IR_RAW)
1303 ir_raw_load_modules(&new_protocols);
1305 rc = dev->change_protocol(dev, &new_protocols);
1307 dev_dbg(&dev->dev, "Error setting protocols to 0x%llx\n",
1308 (long long)new_protocols);
1312 if (new_protocols != old_protocols) {
1313 *current_protocols = new_protocols;
1314 dev_dbg(&dev->dev, "Protocols changed to 0x%llx\n",
1315 (long long)new_protocols);
1319 * If a protocol change was attempted the filter may need updating, even
1320 * if the actual protocol mask hasn't changed (since the driver may have
1321 * cleared the filter).
1322 * Try setting the same filter with the new protocol (if any).
1323 * Fall back to clearing the filter.
1325 if (dev->s_filter && filter->mask) {
1327 rc = dev->s_filter(dev, filter);
1334 dev->s_filter(dev, filter);
1341 mutex_unlock(&dev->lock);
1346 * show_filter() - shows the current scancode filter value or mask
1347 * @device: the device descriptor
1348 * @attr: the device attribute struct
1349 * @buf: a pointer to the output buffer
1351 * This routine is a callback routine to read a scancode filter value or mask.
1352 * It is triggered by reading /sys/class/rc/rc?/[wakeup_]filter[_mask].
1353 * It prints the current scancode filter value or mask of the appropriate filter
1354 * type in hexadecimal into @buf and returns the size of the buffer.
1356 * Bits of the filter value corresponding to set bits in the filter mask are
1357 * compared against input scancodes and non-matching scancodes are discarded.
1359 * dev->lock is taken to guard against races between
1360 * store_filter and show_filter.
1362 static ssize_t show_filter(struct device *device,
1363 struct device_attribute *attr,
1366 struct rc_dev *dev = to_rc_dev(device);
1367 struct rc_filter_attribute *fattr = to_rc_filter_attr(attr);
1368 struct rc_scancode_filter *filter;
1371 mutex_lock(&dev->lock);
1373 if (fattr->type == RC_FILTER_NORMAL)
1374 filter = &dev->scancode_filter;
1376 filter = &dev->scancode_wakeup_filter;
1382 mutex_unlock(&dev->lock);
1384 return sprintf(buf, "%#x\n", val);
1388 * store_filter() - changes the scancode filter value
1389 * @device: the device descriptor
1390 * @attr: the device attribute struct
1391 * @buf: a pointer to the input buffer
1392 * @len: length of the input buffer
1394 * This routine is for changing a scancode filter value or mask.
1395 * It is triggered by writing to /sys/class/rc/rc?/[wakeup_]filter[_mask].
1396 * Returns -EINVAL if an invalid filter value for the current protocol was
1397 * specified or if scancode filtering is not supported by the driver, otherwise
1400 * Bits of the filter value corresponding to set bits in the filter mask are
1401 * compared against input scancodes and non-matching scancodes are discarded.
1403 * dev->lock is taken to guard against races between
1404 * store_filter and show_filter.
1406 static ssize_t store_filter(struct device *device,
1407 struct device_attribute *attr,
1408 const char *buf, size_t len)
1410 struct rc_dev *dev = to_rc_dev(device);
1411 struct rc_filter_attribute *fattr = to_rc_filter_attr(attr);
1412 struct rc_scancode_filter new_filter, *filter;
1415 int (*set_filter)(struct rc_dev *dev, struct rc_scancode_filter *filter);
1417 ret = kstrtoul(buf, 0, &val);
1421 if (fattr->type == RC_FILTER_NORMAL) {
1422 set_filter = dev->s_filter;
1423 filter = &dev->scancode_filter;
1425 set_filter = dev->s_wakeup_filter;
1426 filter = &dev->scancode_wakeup_filter;
1432 mutex_lock(&dev->lock);
1434 new_filter = *filter;
1436 new_filter.mask = val;
1438 new_filter.data = val;
1440 if (fattr->type == RC_FILTER_WAKEUP) {
1442 * Refuse to set a filter unless a protocol is enabled
1443 * and the filter is valid for that protocol
1445 if (dev->wakeup_protocol != RC_PROTO_UNKNOWN)
1446 ret = rc_validate_filter(dev, &new_filter);
1454 if (fattr->type == RC_FILTER_NORMAL && !dev->enabled_protocols &&
1456 /* refuse to set a filter unless a protocol is enabled */
1461 ret = set_filter(dev, &new_filter);
1465 *filter = new_filter;
1468 mutex_unlock(&dev->lock);
1469 return (ret < 0) ? ret : len;
1473 * show_wakeup_protocols() - shows the wakeup IR protocol
1474 * @device: the device descriptor
1475 * @mattr: the device attribute struct
1476 * @buf: a pointer to the output buffer
1478 * This routine is a callback routine for input read the IR protocol type(s).
1479 * it is triggered by reading /sys/class/rc/rc?/wakeup_protocols.
1480 * It returns the protocol names of supported protocols.
1481 * The enabled protocols are printed in brackets.
1483 * dev->lock is taken to guard against races between
1484 * store_wakeup_protocols and show_wakeup_protocols.
1486 static ssize_t show_wakeup_protocols(struct device *device,
1487 struct device_attribute *mattr,
1490 struct rc_dev *dev = to_rc_dev(device);
1492 enum rc_proto enabled;
1496 mutex_lock(&dev->lock);
1498 allowed = dev->allowed_wakeup_protocols;
1499 enabled = dev->wakeup_protocol;
1501 mutex_unlock(&dev->lock);
1503 dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - %d\n",
1504 __func__, (long long)allowed, enabled);
1506 for (i = 0; i < ARRAY_SIZE(protocols); i++) {
1507 if (allowed & (1ULL << i)) {
1509 tmp += sprintf(tmp, "[%s] ", protocols[i].name);
1511 tmp += sprintf(tmp, "%s ", protocols[i].name);
1519 return tmp + 1 - buf;
1523 * store_wakeup_protocols() - changes the wakeup IR protocol(s)
1524 * @device: the device descriptor
1525 * @mattr: the device attribute struct
1526 * @buf: a pointer to the input buffer
1527 * @len: length of the input buffer
1529 * This routine is for changing the IR protocol type.
1530 * It is triggered by writing to /sys/class/rc/rc?/wakeup_protocols.
1531 * Returns @len on success or a negative error code.
1533 * dev->lock is taken to guard against races between
1534 * store_wakeup_protocols and show_wakeup_protocols.
1536 static ssize_t store_wakeup_protocols(struct device *device,
1537 struct device_attribute *mattr,
1538 const char *buf, size_t len)
1540 struct rc_dev *dev = to_rc_dev(device);
1541 enum rc_proto protocol = RC_PROTO_UNKNOWN;
1546 mutex_lock(&dev->lock);
1548 allowed = dev->allowed_wakeup_protocols;
1550 if (!sysfs_streq(buf, "none")) {
1551 for (i = 0; i < ARRAY_SIZE(protocols); i++) {
1552 if ((allowed & (1ULL << i)) &&
1553 sysfs_streq(buf, protocols[i].name)) {
1559 if (i == ARRAY_SIZE(protocols)) {
1564 if (dev->encode_wakeup) {
1565 u64 mask = 1ULL << protocol;
1567 ir_raw_load_modules(&mask);
1575 if (dev->wakeup_protocol != protocol) {
1576 dev->wakeup_protocol = protocol;
1577 dev_dbg(&dev->dev, "Wakeup protocol changed to %d\n", protocol);
1579 if (protocol == RC_PROTO_RC6_MCE)
1580 dev->scancode_wakeup_filter.data = 0x800f0000;
1582 dev->scancode_wakeup_filter.data = 0;
1583 dev->scancode_wakeup_filter.mask = 0;
1585 rc = dev->s_wakeup_filter(dev, &dev->scancode_wakeup_filter);
1593 mutex_unlock(&dev->lock);
1597 static void rc_dev_release(struct device *device)
1599 struct rc_dev *dev = to_rc_dev(device);
1604 #define ADD_HOTPLUG_VAR(fmt, val...) \
1606 int err = add_uevent_var(env, fmt, val); \
1611 static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env)
1613 struct rc_dev *dev = to_rc_dev(device);
1615 if (dev->rc_map.name)
1616 ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name);
1617 if (dev->driver_name)
1618 ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name);
1619 if (dev->device_name)
1620 ADD_HOTPLUG_VAR("DEV_NAME=%s", dev->device_name);
1626 * Static device attribute struct with the sysfs attributes for IR's
1628 static struct device_attribute dev_attr_ro_protocols =
1629 __ATTR(protocols, 0444, show_protocols, NULL);
1630 static struct device_attribute dev_attr_rw_protocols =
1631 __ATTR(protocols, 0644, show_protocols, store_protocols);
1632 static DEVICE_ATTR(wakeup_protocols, 0644, show_wakeup_protocols,
1633 store_wakeup_protocols);
1634 static RC_FILTER_ATTR(filter, S_IRUGO|S_IWUSR,
1635 show_filter, store_filter, RC_FILTER_NORMAL, false);
1636 static RC_FILTER_ATTR(filter_mask, S_IRUGO|S_IWUSR,
1637 show_filter, store_filter, RC_FILTER_NORMAL, true);
1638 static RC_FILTER_ATTR(wakeup_filter, S_IRUGO|S_IWUSR,
1639 show_filter, store_filter, RC_FILTER_WAKEUP, false);
1640 static RC_FILTER_ATTR(wakeup_filter_mask, S_IRUGO|S_IWUSR,
1641 show_filter, store_filter, RC_FILTER_WAKEUP, true);
1643 static struct attribute *rc_dev_rw_protocol_attrs[] = {
1644 &dev_attr_rw_protocols.attr,
1648 static const struct attribute_group rc_dev_rw_protocol_attr_grp = {
1649 .attrs = rc_dev_rw_protocol_attrs,
1652 static struct attribute *rc_dev_ro_protocol_attrs[] = {
1653 &dev_attr_ro_protocols.attr,
1657 static const struct attribute_group rc_dev_ro_protocol_attr_grp = {
1658 .attrs = rc_dev_ro_protocol_attrs,
1661 static struct attribute *rc_dev_filter_attrs[] = {
1662 &dev_attr_filter.attr.attr,
1663 &dev_attr_filter_mask.attr.attr,
1667 static const struct attribute_group rc_dev_filter_attr_grp = {
1668 .attrs = rc_dev_filter_attrs,
1671 static struct attribute *rc_dev_wakeup_filter_attrs[] = {
1672 &dev_attr_wakeup_filter.attr.attr,
1673 &dev_attr_wakeup_filter_mask.attr.attr,
1674 &dev_attr_wakeup_protocols.attr,
1678 static const struct attribute_group rc_dev_wakeup_filter_attr_grp = {
1679 .attrs = rc_dev_wakeup_filter_attrs,
1682 static const struct device_type rc_dev_type = {
1683 .release = rc_dev_release,
1684 .uevent = rc_dev_uevent,
1687 struct rc_dev *rc_allocate_device(enum rc_driver_type type)
1691 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1695 if (type != RC_DRIVER_IR_RAW_TX) {
1696 dev->input_dev = input_allocate_device();
1697 if (!dev->input_dev) {
1702 dev->input_dev->getkeycode = ir_getkeycode;
1703 dev->input_dev->setkeycode = ir_setkeycode;
1704 input_set_drvdata(dev->input_dev, dev);
1706 dev->timeout = IR_DEFAULT_TIMEOUT;
1707 timer_setup(&dev->timer_keyup, ir_timer_keyup, 0);
1708 timer_setup(&dev->timer_repeat, ir_timer_repeat, 0);
1710 spin_lock_init(&dev->rc_map.lock);
1711 spin_lock_init(&dev->keylock);
1713 mutex_init(&dev->lock);
1715 dev->dev.type = &rc_dev_type;
1716 dev->dev.class = &rc_class;
1717 device_initialize(&dev->dev);
1719 dev->driver_type = type;
1721 __module_get(THIS_MODULE);
1724 EXPORT_SYMBOL_GPL(rc_allocate_device);
1726 void rc_free_device(struct rc_dev *dev)
1731 input_free_device(dev->input_dev);
1733 put_device(&dev->dev);
1735 /* kfree(dev) will be called by the callback function
1738 module_put(THIS_MODULE);
1740 EXPORT_SYMBOL_GPL(rc_free_device);
1742 static void devm_rc_alloc_release(struct device *dev, void *res)
1744 rc_free_device(*(struct rc_dev **)res);
1747 struct rc_dev *devm_rc_allocate_device(struct device *dev,
1748 enum rc_driver_type type)
1750 struct rc_dev **dr, *rc;
1752 dr = devres_alloc(devm_rc_alloc_release, sizeof(*dr), GFP_KERNEL);
1756 rc = rc_allocate_device(type);
1762 rc->dev.parent = dev;
1763 rc->managed_alloc = true;
1765 devres_add(dev, dr);
1769 EXPORT_SYMBOL_GPL(devm_rc_allocate_device);
1771 static int rc_prepare_rx_device(struct rc_dev *dev)
1774 struct rc_map *rc_map;
1780 rc_map = rc_map_get(dev->map_name);
1782 rc_map = rc_map_get(RC_MAP_EMPTY);
1783 if (!rc_map || !rc_map->scan || rc_map->size == 0)
1786 rc = ir_setkeytable(dev, rc_map);
1790 rc_proto = BIT_ULL(rc_map->rc_proto);
1792 if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol)
1793 dev->enabled_protocols = dev->allowed_protocols;
1795 if (dev->driver_type == RC_DRIVER_IR_RAW)
1796 ir_raw_load_modules(&rc_proto);
1798 if (dev->change_protocol) {
1799 rc = dev->change_protocol(dev, &rc_proto);
1802 dev->enabled_protocols = rc_proto;
1805 /* Keyboard events */
1806 set_bit(EV_KEY, dev->input_dev->evbit);
1807 set_bit(EV_REP, dev->input_dev->evbit);
1808 set_bit(EV_MSC, dev->input_dev->evbit);
1809 set_bit(MSC_SCAN, dev->input_dev->mscbit);
1811 /* Pointer/mouse events */
1812 set_bit(INPUT_PROP_POINTING_STICK, dev->input_dev->propbit);
1813 set_bit(EV_REL, dev->input_dev->evbit);
1814 set_bit(REL_X, dev->input_dev->relbit);
1815 set_bit(REL_Y, dev->input_dev->relbit);
1818 dev->input_dev->open = ir_open;
1820 dev->input_dev->close = ir_close;
1822 dev->input_dev->dev.parent = &dev->dev;
1823 memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id));
1824 dev->input_dev->phys = dev->input_phys;
1825 dev->input_dev->name = dev->device_name;
1830 ir_free_table(&dev->rc_map);
1835 static int rc_setup_rx_device(struct rc_dev *dev)
1839 /* rc_open will be called here */
1840 rc = input_register_device(dev->input_dev);
1845 * Default delay of 250ms is too short for some protocols, especially
1846 * since the timeout is currently set to 250ms. Increase it to 500ms,
1847 * to avoid wrong repetition of the keycodes. Note that this must be
1848 * set after the call to input_register_device().
1850 if (dev->allowed_protocols == RC_PROTO_BIT_CEC)
1851 dev->input_dev->rep[REP_DELAY] = 0;
1853 dev->input_dev->rep[REP_DELAY] = 500;
1856 * As a repeat event on protocols like RC-5 and NEC take as long as
1857 * 110/114ms, using 33ms as a repeat period is not the right thing
1860 dev->input_dev->rep[REP_PERIOD] = 125;
1865 static void rc_free_rx_device(struct rc_dev *dev)
1870 if (dev->input_dev) {
1871 input_unregister_device(dev->input_dev);
1872 dev->input_dev = NULL;
1875 ir_free_table(&dev->rc_map);
1878 int rc_register_device(struct rc_dev *dev)
1888 minor = ida_simple_get(&rc_ida, 0, RC_DEV_MAX, GFP_KERNEL);
1893 dev_set_name(&dev->dev, "rc%u", dev->minor);
1894 dev_set_drvdata(&dev->dev, dev);
1896 dev->dev.groups = dev->sysfs_groups;
1897 if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol)
1898 dev->sysfs_groups[attr++] = &rc_dev_ro_protocol_attr_grp;
1899 else if (dev->driver_type != RC_DRIVER_IR_RAW_TX)
1900 dev->sysfs_groups[attr++] = &rc_dev_rw_protocol_attr_grp;
1902 dev->sysfs_groups[attr++] = &rc_dev_filter_attr_grp;
1903 if (dev->s_wakeup_filter)
1904 dev->sysfs_groups[attr++] = &rc_dev_wakeup_filter_attr_grp;
1905 dev->sysfs_groups[attr++] = NULL;
1907 if (dev->driver_type == RC_DRIVER_IR_RAW) {
1908 rc = ir_raw_event_prepare(dev);
1913 if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
1914 rc = rc_prepare_rx_device(dev);
1919 rc = device_add(&dev->dev);
1923 path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
1924 dev_info(&dev->dev, "%s as %s\n",
1925 dev->device_name ?: "Unspecified device", path ?: "N/A");
1928 dev->registered = true;
1931 * once the the input device is registered in rc_setup_rx_device,
1932 * userspace can open the input device and rc_open() will be called
1933 * as a result. This results in driver code being allowed to submit
1934 * keycodes with rc_keydown, so lirc must be registered first.
1936 if (dev->allowed_protocols != RC_PROTO_BIT_CEC) {
1937 rc = ir_lirc_register(dev);
1942 if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
1943 rc = rc_setup_rx_device(dev);
1948 if (dev->driver_type == RC_DRIVER_IR_RAW) {
1949 rc = ir_raw_event_register(dev);
1954 dev_dbg(&dev->dev, "Registered rc%u (driver: %s)\n", dev->minor,
1955 dev->driver_name ? dev->driver_name : "unknown");
1960 rc_free_rx_device(dev);
1962 if (dev->allowed_protocols != RC_PROTO_BIT_CEC)
1963 ir_lirc_unregister(dev);
1965 device_del(&dev->dev);
1967 ir_free_table(&dev->rc_map);
1969 ir_raw_event_free(dev);
1971 ida_simple_remove(&rc_ida, minor);
1974 EXPORT_SYMBOL_GPL(rc_register_device);
1976 static void devm_rc_release(struct device *dev, void *res)
1978 rc_unregister_device(*(struct rc_dev **)res);
1981 int devm_rc_register_device(struct device *parent, struct rc_dev *dev)
1986 dr = devres_alloc(devm_rc_release, sizeof(*dr), GFP_KERNEL);
1990 ret = rc_register_device(dev);
1997 devres_add(parent, dr);
2001 EXPORT_SYMBOL_GPL(devm_rc_register_device);
2003 void rc_unregister_device(struct rc_dev *dev)
2008 if (dev->driver_type == RC_DRIVER_IR_RAW)
2009 ir_raw_event_unregister(dev);
2011 del_timer_sync(&dev->timer_keyup);
2012 del_timer_sync(&dev->timer_repeat);
2014 rc_free_rx_device(dev);
2016 mutex_lock(&dev->lock);
2017 if (dev->users && dev->close)
2019 dev->registered = false;
2020 mutex_unlock(&dev->lock);
2023 * lirc device should be freed with dev->registered = false, so
2024 * that userspace polling will get notified.
2026 if (dev->allowed_protocols != RC_PROTO_BIT_CEC)
2027 ir_lirc_unregister(dev);
2029 device_del(&dev->dev);
2031 ida_simple_remove(&rc_ida, dev->minor);
2033 if (!dev->managed_alloc)
2034 rc_free_device(dev);
2037 EXPORT_SYMBOL_GPL(rc_unregister_device);
2040 * Init/exit code for the module. Basically, creates/removes /sys/class/rc
2043 static int __init rc_core_init(void)
2045 int rc = class_register(&rc_class);
2047 pr_err("rc_core: unable to register rc class\n");
2051 rc = lirc_dev_init();
2053 pr_err("rc_core: unable to init lirc\n");
2054 class_unregister(&rc_class);
2058 led_trigger_register_simple("rc-feedback", &led_feedback);
2059 rc_map_register(&empty_map);
2064 static void __exit rc_core_exit(void)
2067 class_unregister(&rc_class);
2068 led_trigger_unregister_simple(led_feedback);
2069 rc_map_unregister(&empty_map);
2072 subsys_initcall(rc_core_init);
2073 module_exit(rc_core_exit);
2075 MODULE_AUTHOR("Mauro Carvalho Chehab");
2076 MODULE_LICENSE("GPL v2");