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1 | // SPDX-License-Identifier: GPL-2.0 | |
2 | // rc-main.c - Remote Controller core module | |
3 | // | |
4 | // Copyright (C) 2009-2010 by Mauro Carvalho Chehab | |
5 | ||
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
7 | ||
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" | |
19 | ||
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 | |
23 | ||
24 | static const struct { | |
25 | const char *name; | |
26 | unsigned int repeat_period; | |
27 | unsigned int scancode_bits; | |
28 | } protocols[] = { | |
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 }, | |
80 | }; | |
81 | ||
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; | |
86 | ||
87 | /* Used to keep track of rc devices */ | |
88 | static DEFINE_IDA(rc_ida); | |
89 | ||
90 | static struct rc_map_list *seek_rc_map(const char *name) | |
91 | { | |
92 | struct rc_map_list *map = NULL; | |
93 | ||
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); | |
98 | return map; | |
99 | } | |
100 | } | |
101 | spin_unlock(&rc_map_lock); | |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
106 | struct rc_map *rc_map_get(const char *name) | |
107 | { | |
108 | ||
109 | struct rc_map_list *map; | |
110 | ||
111 | map = seek_rc_map(name); | |
112 | #ifdef CONFIG_MODULES | |
113 | if (!map) { | |
114 | int rc = request_module("%s", name); | |
115 | if (rc < 0) { | |
116 | pr_err("Couldn't load IR keymap %s\n", name); | |
117 | return NULL; | |
118 | } | |
119 | msleep(20); /* Give some time for IR to register */ | |
120 | ||
121 | map = seek_rc_map(name); | |
122 | } | |
123 | #endif | |
124 | if (!map) { | |
125 | pr_err("IR keymap %s not found\n", name); | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | printk(KERN_INFO "Registered IR keymap %s\n", map->map.name); | |
130 | ||
131 | return &map->map; | |
132 | } | |
133 | EXPORT_SYMBOL_GPL(rc_map_get); | |
134 | ||
135 | int rc_map_register(struct rc_map_list *map) | |
136 | { | |
137 | spin_lock(&rc_map_lock); | |
138 | list_add_tail(&map->list, &rc_map_list); | |
139 | spin_unlock(&rc_map_lock); | |
140 | return 0; | |
141 | } | |
142 | EXPORT_SYMBOL_GPL(rc_map_register); | |
143 | ||
144 | void rc_map_unregister(struct rc_map_list *map) | |
145 | { | |
146 | spin_lock(&rc_map_lock); | |
147 | list_del(&map->list); | |
148 | spin_unlock(&rc_map_lock); | |
149 | } | |
150 | EXPORT_SYMBOL_GPL(rc_map_unregister); | |
151 | ||
152 | ||
153 | static struct rc_map_table empty[] = { | |
154 | { 0x2a, KEY_COFFEE }, | |
155 | }; | |
156 | ||
157 | static struct rc_map_list empty_map = { | |
158 | .map = { | |
159 | .scan = empty, | |
160 | .size = ARRAY_SIZE(empty), | |
161 | .rc_proto = RC_PROTO_UNKNOWN, /* Legacy IR type */ | |
162 | .name = RC_MAP_EMPTY, | |
163 | } | |
164 | }; | |
165 | ||
166 | /** | |
167 | * ir_create_table() - initializes a scancode table | |
168 | * @dev: the rc_dev device | |
169 | * @rc_map: the rc_map to initialize | |
170 | * @name: name to assign to the table | |
171 | * @rc_proto: ir type to assign to the new table | |
172 | * @size: initial size of the table | |
173 | * | |
174 | * This routine will initialize the rc_map and will allocate | |
175 | * memory to hold at least the specified number of elements. | |
176 | * | |
177 | * return: zero on success or a negative error code | |
178 | */ | |
179 | static int ir_create_table(struct rc_dev *dev, struct rc_map *rc_map, | |
180 | const char *name, u64 rc_proto, size_t size) | |
181 | { | |
182 | rc_map->name = kstrdup(name, GFP_KERNEL); | |
183 | if (!rc_map->name) | |
184 | return -ENOMEM; | |
185 | rc_map->rc_proto = rc_proto; | |
186 | rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table)); | |
187 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); | |
188 | rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL); | |
189 | if (!rc_map->scan) { | |
190 | kfree(rc_map->name); | |
191 | rc_map->name = NULL; | |
192 | return -ENOMEM; | |
193 | } | |
194 | ||
195 | dev_dbg(&dev->dev, "Allocated space for %u keycode entries (%u bytes)\n", | |
196 | rc_map->size, rc_map->alloc); | |
197 | return 0; | |
198 | } | |
199 | ||
200 | /** | |
201 | * ir_free_table() - frees memory allocated by a scancode table | |
202 | * @rc_map: the table whose mappings need to be freed | |
203 | * | |
204 | * This routine will free memory alloctaed for key mappings used by given | |
205 | * scancode table. | |
206 | */ | |
207 | static void ir_free_table(struct rc_map *rc_map) | |
208 | { | |
209 | rc_map->size = 0; | |
210 | kfree(rc_map->name); | |
211 | rc_map->name = NULL; | |
212 | kfree(rc_map->scan); | |
213 | rc_map->scan = NULL; | |
214 | } | |
215 | ||
216 | /** | |
217 | * ir_resize_table() - resizes a scancode table if necessary | |
218 | * @dev: the rc_dev device | |
219 | * @rc_map: the rc_map to resize | |
220 | * @gfp_flags: gfp flags to use when allocating memory | |
221 | * | |
222 | * This routine will shrink the rc_map if it has lots of | |
223 | * unused entries and grow it if it is full. | |
224 | * | |
225 | * return: zero on success or a negative error code | |
226 | */ | |
227 | static int ir_resize_table(struct rc_dev *dev, struct rc_map *rc_map, | |
228 | gfp_t gfp_flags) | |
229 | { | |
230 | unsigned int oldalloc = rc_map->alloc; | |
231 | unsigned int newalloc = oldalloc; | |
232 | struct rc_map_table *oldscan = rc_map->scan; | |
233 | struct rc_map_table *newscan; | |
234 | ||
235 | if (rc_map->size == rc_map->len) { | |
236 | /* All entries in use -> grow keytable */ | |
237 | if (rc_map->alloc >= IR_TAB_MAX_SIZE) | |
238 | return -ENOMEM; | |
239 | ||
240 | newalloc *= 2; | |
241 | dev_dbg(&dev->dev, "Growing table to %u bytes\n", newalloc); | |
242 | } | |
243 | ||
244 | if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) { | |
245 | /* Less than 1/3 of entries in use -> shrink keytable */ | |
246 | newalloc /= 2; | |
247 | dev_dbg(&dev->dev, "Shrinking table to %u bytes\n", newalloc); | |
248 | } | |
249 | ||
250 | if (newalloc == oldalloc) | |
251 | return 0; | |
252 | ||
253 | newscan = kmalloc(newalloc, gfp_flags); | |
254 | if (!newscan) | |
255 | return -ENOMEM; | |
256 | ||
257 | memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table)); | |
258 | rc_map->scan = newscan; | |
259 | rc_map->alloc = newalloc; | |
260 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); | |
261 | kfree(oldscan); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | /** | |
266 | * ir_update_mapping() - set a keycode in the scancode->keycode table | |
267 | * @dev: the struct rc_dev device descriptor | |
268 | * @rc_map: scancode table to be adjusted | |
269 | * @index: index of the mapping that needs to be updated | |
270 | * @new_keycode: the desired keycode | |
271 | * | |
272 | * This routine is used to update scancode->keycode mapping at given | |
273 | * position. | |
274 | * | |
275 | * return: previous keycode assigned to the mapping | |
276 | * | |
277 | */ | |
278 | static unsigned int ir_update_mapping(struct rc_dev *dev, | |
279 | struct rc_map *rc_map, | |
280 | unsigned int index, | |
281 | unsigned int new_keycode) | |
282 | { | |
283 | int old_keycode = rc_map->scan[index].keycode; | |
284 | int i; | |
285 | ||
286 | /* Did the user wish to remove the mapping? */ | |
287 | if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) { | |
288 | dev_dbg(&dev->dev, "#%d: Deleting scan 0x%04x\n", | |
289 | index, rc_map->scan[index].scancode); | |
290 | rc_map->len--; | |
291 | memmove(&rc_map->scan[index], &rc_map->scan[index+ 1], | |
292 | (rc_map->len - index) * sizeof(struct rc_map_table)); | |
293 | } else { | |
294 | dev_dbg(&dev->dev, "#%d: %s scan 0x%04x with key 0x%04x\n", | |
295 | index, | |
296 | old_keycode == KEY_RESERVED ? "New" : "Replacing", | |
297 | rc_map->scan[index].scancode, new_keycode); | |
298 | rc_map->scan[index].keycode = new_keycode; | |
299 | __set_bit(new_keycode, dev->input_dev->keybit); | |
300 | } | |
301 | ||
302 | if (old_keycode != KEY_RESERVED) { | |
303 | /* A previous mapping was updated... */ | |
304 | __clear_bit(old_keycode, dev->input_dev->keybit); | |
305 | /* ... but another scancode might use the same keycode */ | |
306 | for (i = 0; i < rc_map->len; i++) { | |
307 | if (rc_map->scan[i].keycode == old_keycode) { | |
308 | __set_bit(old_keycode, dev->input_dev->keybit); | |
309 | break; | |
310 | } | |
311 | } | |
312 | ||
313 | /* Possibly shrink the keytable, failure is not a problem */ | |
314 | ir_resize_table(dev, rc_map, GFP_ATOMIC); | |
315 | } | |
316 | ||
317 | return old_keycode; | |
318 | } | |
319 | ||
320 | /** | |
321 | * ir_establish_scancode() - set a keycode in the scancode->keycode table | |
322 | * @dev: the struct rc_dev device descriptor | |
323 | * @rc_map: scancode table to be searched | |
324 | * @scancode: the desired scancode | |
325 | * @resize: controls whether we allowed to resize the table to | |
326 | * accommodate not yet present scancodes | |
327 | * | |
328 | * This routine is used to locate given scancode in rc_map. | |
329 | * If scancode is not yet present the routine will allocate a new slot | |
330 | * for it. | |
331 | * | |
332 | * return: index of the mapping containing scancode in question | |
333 | * or -1U in case of failure. | |
334 | */ | |
335 | static unsigned int ir_establish_scancode(struct rc_dev *dev, | |
336 | struct rc_map *rc_map, | |
337 | unsigned int scancode, | |
338 | bool resize) | |
339 | { | |
340 | unsigned int i; | |
341 | ||
342 | /* | |
343 | * Unfortunately, some hardware-based IR decoders don't provide | |
344 | * all bits for the complete IR code. In general, they provide only | |
345 | * the command part of the IR code. Yet, as it is possible to replace | |
346 | * the provided IR with another one, it is needed to allow loading | |
347 | * IR tables from other remotes. So, we support specifying a mask to | |
348 | * indicate the valid bits of the scancodes. | |
349 | */ | |
350 | if (dev->scancode_mask) | |
351 | scancode &= dev->scancode_mask; | |
352 | ||
353 | /* First check if we already have a mapping for this ir command */ | |
354 | for (i = 0; i < rc_map->len; i++) { | |
355 | if (rc_map->scan[i].scancode == scancode) | |
356 | return i; | |
357 | ||
358 | /* Keytable is sorted from lowest to highest scancode */ | |
359 | if (rc_map->scan[i].scancode >= scancode) | |
360 | break; | |
361 | } | |
362 | ||
363 | /* No previous mapping found, we might need to grow the table */ | |
364 | if (rc_map->size == rc_map->len) { | |
365 | if (!resize || ir_resize_table(dev, rc_map, GFP_ATOMIC)) | |
366 | return -1U; | |
367 | } | |
368 | ||
369 | /* i is the proper index to insert our new keycode */ | |
370 | if (i < rc_map->len) | |
371 | memmove(&rc_map->scan[i + 1], &rc_map->scan[i], | |
372 | (rc_map->len - i) * sizeof(struct rc_map_table)); | |
373 | rc_map->scan[i].scancode = scancode; | |
374 | rc_map->scan[i].keycode = KEY_RESERVED; | |
375 | rc_map->len++; | |
376 | ||
377 | return i; | |
378 | } | |
379 | ||
380 | /** | |
381 | * ir_setkeycode() - set a keycode in the scancode->keycode table | |
382 | * @idev: the struct input_dev device descriptor | |
383 | * @ke: Input keymap entry | |
384 | * @old_keycode: result | |
385 | * | |
386 | * This routine is used to handle evdev EVIOCSKEY ioctl. | |
387 | * | |
388 | * return: -EINVAL if the keycode could not be inserted, otherwise zero. | |
389 | */ | |
390 | static int ir_setkeycode(struct input_dev *idev, | |
391 | const struct input_keymap_entry *ke, | |
392 | unsigned int *old_keycode) | |
393 | { | |
394 | struct rc_dev *rdev = input_get_drvdata(idev); | |
395 | struct rc_map *rc_map = &rdev->rc_map; | |
396 | unsigned int index; | |
397 | unsigned int scancode; | |
398 | int retval = 0; | |
399 | unsigned long flags; | |
400 | ||
401 | spin_lock_irqsave(&rc_map->lock, flags); | |
402 | ||
403 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
404 | index = ke->index; | |
405 | if (index >= rc_map->len) { | |
406 | retval = -EINVAL; | |
407 | goto out; | |
408 | } | |
409 | } else { | |
410 | retval = input_scancode_to_scalar(ke, &scancode); | |
411 | if (retval) | |
412 | goto out; | |
413 | ||
414 | index = ir_establish_scancode(rdev, rc_map, scancode, true); | |
415 | if (index >= rc_map->len) { | |
416 | retval = -ENOMEM; | |
417 | goto out; | |
418 | } | |
419 | } | |
420 | ||
421 | *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode); | |
422 | ||
423 | out: | |
424 | spin_unlock_irqrestore(&rc_map->lock, flags); | |
425 | return retval; | |
426 | } | |
427 | ||
428 | /** | |
429 | * ir_setkeytable() - sets several entries in the scancode->keycode table | |
430 | * @dev: the struct rc_dev device descriptor | |
431 | * @from: the struct rc_map to copy entries from | |
432 | * | |
433 | * This routine is used to handle table initialization. | |
434 | * | |
435 | * return: -ENOMEM if all keycodes could not be inserted, otherwise zero. | |
436 | */ | |
437 | static int ir_setkeytable(struct rc_dev *dev, | |
438 | const struct rc_map *from) | |
439 | { | |
440 | struct rc_map *rc_map = &dev->rc_map; | |
441 | unsigned int i, index; | |
442 | int rc; | |
443 | ||
444 | rc = ir_create_table(dev, rc_map, from->name, from->rc_proto, | |
445 | from->size); | |
446 | if (rc) | |
447 | return rc; | |
448 | ||
449 | for (i = 0; i < from->size; i++) { | |
450 | index = ir_establish_scancode(dev, rc_map, | |
451 | from->scan[i].scancode, false); | |
452 | if (index >= rc_map->len) { | |
453 | rc = -ENOMEM; | |
454 | break; | |
455 | } | |
456 | ||
457 | ir_update_mapping(dev, rc_map, index, | |
458 | from->scan[i].keycode); | |
459 | } | |
460 | ||
461 | if (rc) | |
462 | ir_free_table(rc_map); | |
463 | ||
464 | return rc; | |
465 | } | |
466 | ||
467 | static int rc_map_cmp(const void *key, const void *elt) | |
468 | { | |
469 | const unsigned int *scancode = key; | |
470 | const struct rc_map_table *e = elt; | |
471 | ||
472 | if (*scancode < e->scancode) | |
473 | return -1; | |
474 | else if (*scancode > e->scancode) | |
475 | return 1; | |
476 | return 0; | |
477 | } | |
478 | ||
479 | /** | |
480 | * ir_lookup_by_scancode() - locate mapping by scancode | |
481 | * @rc_map: the struct rc_map to search | |
482 | * @scancode: scancode to look for in the table | |
483 | * | |
484 | * This routine performs binary search in RC keykeymap table for | |
485 | * given scancode. | |
486 | * | |
487 | * return: index in the table, -1U if not found | |
488 | */ | |
489 | static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map, | |
490 | unsigned int scancode) | |
491 | { | |
492 | struct rc_map_table *res; | |
493 | ||
494 | res = bsearch(&scancode, rc_map->scan, rc_map->len, | |
495 | sizeof(struct rc_map_table), rc_map_cmp); | |
496 | if (!res) | |
497 | return -1U; | |
498 | else | |
499 | return res - rc_map->scan; | |
500 | } | |
501 | ||
502 | /** | |
503 | * ir_getkeycode() - get a keycode from the scancode->keycode table | |
504 | * @idev: the struct input_dev device descriptor | |
505 | * @ke: Input keymap entry | |
506 | * | |
507 | * This routine is used to handle evdev EVIOCGKEY ioctl. | |
508 | * | |
509 | * return: always returns zero. | |
510 | */ | |
511 | static int ir_getkeycode(struct input_dev *idev, | |
512 | struct input_keymap_entry *ke) | |
513 | { | |
514 | struct rc_dev *rdev = input_get_drvdata(idev); | |
515 | struct rc_map *rc_map = &rdev->rc_map; | |
516 | struct rc_map_table *entry; | |
517 | unsigned long flags; | |
518 | unsigned int index; | |
519 | unsigned int scancode; | |
520 | int retval; | |
521 | ||
522 | spin_lock_irqsave(&rc_map->lock, flags); | |
523 | ||
524 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
525 | index = ke->index; | |
526 | } else { | |
527 | retval = input_scancode_to_scalar(ke, &scancode); | |
528 | if (retval) | |
529 | goto out; | |
530 | ||
531 | index = ir_lookup_by_scancode(rc_map, scancode); | |
532 | } | |
533 | ||
534 | if (index < rc_map->len) { | |
535 | entry = &rc_map->scan[index]; | |
536 | ||
537 | ke->index = index; | |
538 | ke->keycode = entry->keycode; | |
539 | ke->len = sizeof(entry->scancode); | |
540 | memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode)); | |
541 | ||
542 | } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) { | |
543 | /* | |
544 | * We do not really know the valid range of scancodes | |
545 | * so let's respond with KEY_RESERVED to anything we | |
546 | * do not have mapping for [yet]. | |
547 | */ | |
548 | ke->index = index; | |
549 | ke->keycode = KEY_RESERVED; | |
550 | } else { | |
551 | retval = -EINVAL; | |
552 | goto out; | |
553 | } | |
554 | ||
555 | retval = 0; | |
556 | ||
557 | out: | |
558 | spin_unlock_irqrestore(&rc_map->lock, flags); | |
559 | return retval; | |
560 | } | |
561 | ||
562 | /** | |
563 | * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode | |
564 | * @dev: the struct rc_dev descriptor of the device | |
565 | * @scancode: the scancode to look for | |
566 | * | |
567 | * This routine is used by drivers which need to convert a scancode to a | |
568 | * keycode. Normally it should not be used since drivers should have no | |
569 | * interest in keycodes. | |
570 | * | |
571 | * return: the corresponding keycode, or KEY_RESERVED | |
572 | */ | |
573 | u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode) | |
574 | { | |
575 | struct rc_map *rc_map = &dev->rc_map; | |
576 | unsigned int keycode; | |
577 | unsigned int index; | |
578 | unsigned long flags; | |
579 | ||
580 | spin_lock_irqsave(&rc_map->lock, flags); | |
581 | ||
582 | index = ir_lookup_by_scancode(rc_map, scancode); | |
583 | keycode = index < rc_map->len ? | |
584 | rc_map->scan[index].keycode : KEY_RESERVED; | |
585 | ||
586 | spin_unlock_irqrestore(&rc_map->lock, flags); | |
587 | ||
588 | if (keycode != KEY_RESERVED) | |
589 | dev_dbg(&dev->dev, "%s: scancode 0x%04x keycode 0x%02x\n", | |
590 | dev->device_name, scancode, keycode); | |
591 | ||
592 | return keycode; | |
593 | } | |
594 | EXPORT_SYMBOL_GPL(rc_g_keycode_from_table); | |
595 | ||
596 | /** | |
597 | * ir_do_keyup() - internal function to signal the release of a keypress | |
598 | * @dev: the struct rc_dev descriptor of the device | |
599 | * @sync: whether or not to call input_sync | |
600 | * | |
601 | * This function is used internally to release a keypress, it must be | |
602 | * called with keylock held. | |
603 | */ | |
604 | static void ir_do_keyup(struct rc_dev *dev, bool sync) | |
605 | { | |
606 | if (!dev->keypressed) | |
607 | return; | |
608 | ||
609 | dev_dbg(&dev->dev, "keyup key 0x%04x\n", dev->last_keycode); | |
610 | del_timer(&dev->timer_repeat); | |
611 | input_report_key(dev->input_dev, dev->last_keycode, 0); | |
612 | led_trigger_event(led_feedback, LED_OFF); | |
613 | if (sync) | |
614 | input_sync(dev->input_dev); | |
615 | dev->keypressed = false; | |
616 | } | |
617 | ||
618 | /** | |
619 | * rc_keyup() - signals the release of a keypress | |
620 | * @dev: the struct rc_dev descriptor of the device | |
621 | * | |
622 | * This routine is used to signal that a key has been released on the | |
623 | * remote control. | |
624 | */ | |
625 | void rc_keyup(struct rc_dev *dev) | |
626 | { | |
627 | unsigned long flags; | |
628 | ||
629 | spin_lock_irqsave(&dev->keylock, flags); | |
630 | ir_do_keyup(dev, true); | |
631 | spin_unlock_irqrestore(&dev->keylock, flags); | |
632 | } | |
633 | EXPORT_SYMBOL_GPL(rc_keyup); | |
634 | ||
635 | /** | |
636 | * ir_timer_keyup() - generates a keyup event after a timeout | |
637 | * | |
638 | * @t: a pointer to the struct timer_list | |
639 | * | |
640 | * This routine will generate a keyup event some time after a keydown event | |
641 | * is generated when no further activity has been detected. | |
642 | */ | |
643 | static void ir_timer_keyup(struct timer_list *t) | |
644 | { | |
645 | struct rc_dev *dev = from_timer(dev, t, timer_keyup); | |
646 | unsigned long flags; | |
647 | ||
648 | /* | |
649 | * ir->keyup_jiffies is used to prevent a race condition if a | |
650 | * hardware interrupt occurs at this point and the keyup timer | |
651 | * event is moved further into the future as a result. | |
652 | * | |
653 | * The timer will then be reactivated and this function called | |
654 | * again in the future. We need to exit gracefully in that case | |
655 | * to allow the input subsystem to do its auto-repeat magic or | |
656 | * a keyup event might follow immediately after the keydown. | |
657 | */ | |
658 | spin_lock_irqsave(&dev->keylock, flags); | |
659 | if (time_is_before_eq_jiffies(dev->keyup_jiffies)) | |
660 | ir_do_keyup(dev, true); | |
661 | spin_unlock_irqrestore(&dev->keylock, flags); | |
662 | } | |
663 | ||
664 | /** | |
665 | * ir_timer_repeat() - generates a repeat event after a timeout | |
666 | * | |
667 | * @t: a pointer to the struct timer_list | |
668 | * | |
669 | * This routine will generate a soft repeat event every REP_PERIOD | |
670 | * milliseconds. | |
671 | */ | |
672 | static void ir_timer_repeat(struct timer_list *t) | |
673 | { | |
674 | struct rc_dev *dev = from_timer(dev, t, timer_repeat); | |
675 | struct input_dev *input = dev->input_dev; | |
676 | unsigned long flags; | |
677 | ||
678 | spin_lock_irqsave(&dev->keylock, flags); | |
679 | if (dev->keypressed) { | |
680 | input_event(input, EV_KEY, dev->last_keycode, 2); | |
681 | input_sync(input); | |
682 | if (input->rep[REP_PERIOD]) | |
683 | mod_timer(&dev->timer_repeat, jiffies + | |
684 | msecs_to_jiffies(input->rep[REP_PERIOD])); | |
685 | } | |
686 | spin_unlock_irqrestore(&dev->keylock, flags); | |
687 | } | |
688 | ||
689 | static unsigned int repeat_period(int protocol) | |
690 | { | |
691 | if (protocol >= ARRAY_SIZE(protocols)) | |
692 | return 100; | |
693 | ||
694 | return protocols[protocol].repeat_period; | |
695 | } | |
696 | ||
697 | /** | |
698 | * rc_repeat() - signals that a key is still pressed | |
699 | * @dev: the struct rc_dev descriptor of the device | |
700 | * | |
701 | * This routine is used by IR decoders when a repeat message which does | |
702 | * not include the necessary bits to reproduce the scancode has been | |
703 | * received. | |
704 | */ | |
705 | void rc_repeat(struct rc_dev *dev) | |
706 | { | |
707 | unsigned long flags; | |
708 | unsigned int timeout = nsecs_to_jiffies(dev->timeout) + | |
709 | msecs_to_jiffies(repeat_period(dev->last_protocol)); | |
710 | struct lirc_scancode sc = { | |
711 | .scancode = dev->last_scancode, .rc_proto = dev->last_protocol, | |
712 | .keycode = dev->keypressed ? dev->last_keycode : KEY_RESERVED, | |
713 | .flags = LIRC_SCANCODE_FLAG_REPEAT | | |
714 | (dev->last_toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0) | |
715 | }; | |
716 | ||
717 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) | |
718 | ir_lirc_scancode_event(dev, &sc); | |
719 | ||
720 | spin_lock_irqsave(&dev->keylock, flags); | |
721 | ||
722 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode); | |
723 | input_sync(dev->input_dev); | |
724 | ||
725 | if (dev->keypressed) { | |
726 | dev->keyup_jiffies = jiffies + timeout; | |
727 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
728 | } | |
729 | ||
730 | spin_unlock_irqrestore(&dev->keylock, flags); | |
731 | } | |
732 | EXPORT_SYMBOL_GPL(rc_repeat); | |
733 | ||
734 | /** | |
735 | * ir_do_keydown() - internal function to process a keypress | |
736 | * @dev: the struct rc_dev descriptor of the device | |
737 | * @protocol: the protocol of the keypress | |
738 | * @scancode: the scancode of the keypress | |
739 | * @keycode: the keycode of the keypress | |
740 | * @toggle: the toggle value of the keypress | |
741 | * | |
742 | * This function is used internally to register a keypress, it must be | |
743 | * called with keylock held. | |
744 | */ | |
745 | static void ir_do_keydown(struct rc_dev *dev, enum rc_proto protocol, | |
746 | u32 scancode, u32 keycode, u8 toggle) | |
747 | { | |
748 | bool new_event = (!dev->keypressed || | |
749 | dev->last_protocol != protocol || | |
750 | dev->last_scancode != scancode || | |
751 | dev->last_toggle != toggle); | |
752 | struct lirc_scancode sc = { | |
753 | .scancode = scancode, .rc_proto = protocol, | |
754 | .flags = toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0, | |
755 | .keycode = keycode | |
756 | }; | |
757 | ||
758 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) | |
759 | ir_lirc_scancode_event(dev, &sc); | |
760 | ||
761 | if (new_event && dev->keypressed) | |
762 | ir_do_keyup(dev, false); | |
763 | ||
764 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode); | |
765 | ||
766 | dev->last_protocol = protocol; | |
767 | dev->last_scancode = scancode; | |
768 | dev->last_toggle = toggle; | |
769 | dev->last_keycode = keycode; | |
770 | ||
771 | if (new_event && keycode != KEY_RESERVED) { | |
772 | /* Register a keypress */ | |
773 | dev->keypressed = true; | |
774 | ||
775 | dev_dbg(&dev->dev, "%s: key down event, key 0x%04x, protocol 0x%04x, scancode 0x%08x\n", | |
776 | dev->device_name, keycode, protocol, scancode); | |
777 | input_report_key(dev->input_dev, keycode, 1); | |
778 | ||
779 | led_trigger_event(led_feedback, LED_FULL); | |
780 | } | |
781 | ||
782 | /* | |
783 | * For CEC, start sending repeat messages as soon as the first | |
784 | * repeated message is sent, as long as REP_DELAY = 0 and REP_PERIOD | |
785 | * is non-zero. Otherwise, the input layer will generate repeat | |
786 | * messages. | |
787 | */ | |
788 | if (!new_event && keycode != KEY_RESERVED && | |
789 | dev->allowed_protocols == RC_PROTO_BIT_CEC && | |
790 | !timer_pending(&dev->timer_repeat) && | |
791 | dev->input_dev->rep[REP_PERIOD] && | |
792 | !dev->input_dev->rep[REP_DELAY]) { | |
793 | input_event(dev->input_dev, EV_KEY, keycode, 2); | |
794 | mod_timer(&dev->timer_repeat, jiffies + | |
795 | msecs_to_jiffies(dev->input_dev->rep[REP_PERIOD])); | |
796 | } | |
797 | ||
798 | input_sync(dev->input_dev); | |
799 | } | |
800 | ||
801 | /** | |
802 | * rc_keydown() - generates input event for a key press | |
803 | * @dev: the struct rc_dev descriptor of the device | |
804 | * @protocol: the protocol for the keypress | |
805 | * @scancode: the scancode for the keypress | |
806 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't | |
807 | * support toggle values, this should be set to zero) | |
808 | * | |
809 | * This routine is used to signal that a key has been pressed on the | |
810 | * remote control. | |
811 | */ | |
812 | void rc_keydown(struct rc_dev *dev, enum rc_proto protocol, u32 scancode, | |
813 | u8 toggle) | |
814 | { | |
815 | unsigned long flags; | |
816 | u32 keycode = rc_g_keycode_from_table(dev, scancode); | |
817 | ||
818 | spin_lock_irqsave(&dev->keylock, flags); | |
819 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); | |
820 | ||
821 | if (dev->keypressed) { | |
822 | dev->keyup_jiffies = jiffies + nsecs_to_jiffies(dev->timeout) + | |
823 | msecs_to_jiffies(repeat_period(protocol)); | |
824 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
825 | } | |
826 | spin_unlock_irqrestore(&dev->keylock, flags); | |
827 | } | |
828 | EXPORT_SYMBOL_GPL(rc_keydown); | |
829 | ||
830 | /** | |
831 | * rc_keydown_notimeout() - generates input event for a key press without | |
832 | * an automatic keyup event at a later time | |
833 | * @dev: the struct rc_dev descriptor of the device | |
834 | * @protocol: the protocol for the keypress | |
835 | * @scancode: the scancode for the keypress | |
836 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't | |
837 | * support toggle values, this should be set to zero) | |
838 | * | |
839 | * This routine is used to signal that a key has been pressed on the | |
840 | * remote control. The driver must manually call rc_keyup() at a later stage. | |
841 | */ | |
842 | void rc_keydown_notimeout(struct rc_dev *dev, enum rc_proto protocol, | |
843 | u32 scancode, u8 toggle) | |
844 | { | |
845 | unsigned long flags; | |
846 | u32 keycode = rc_g_keycode_from_table(dev, scancode); | |
847 | ||
848 | spin_lock_irqsave(&dev->keylock, flags); | |
849 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); | |
850 | spin_unlock_irqrestore(&dev->keylock, flags); | |
851 | } | |
852 | EXPORT_SYMBOL_GPL(rc_keydown_notimeout); | |
853 | ||
854 | /** | |
855 | * rc_validate_scancode() - checks that a scancode is valid for a protocol. | |
856 | * For nec, it should do the opposite of ir_nec_bytes_to_scancode() | |
857 | * @proto: protocol | |
858 | * @scancode: scancode | |
859 | */ | |
860 | bool rc_validate_scancode(enum rc_proto proto, u32 scancode) | |
861 | { | |
862 | switch (proto) { | |
863 | /* | |
864 | * NECX has a 16-bit address; if the lower 8 bits match the upper | |
865 | * 8 bits inverted, then the address would match regular nec. | |
866 | */ | |
867 | case RC_PROTO_NECX: | |
868 | if ((((scancode >> 16) ^ ~(scancode >> 8)) & 0xff) == 0) | |
869 | return false; | |
870 | break; | |
871 | /* | |
872 | * NEC32 has a 16 bit address and 16 bit command. If the lower 8 bits | |
873 | * of the command match the upper 8 bits inverted, then it would | |
874 | * be either NEC or NECX. | |
875 | */ | |
876 | case RC_PROTO_NEC32: | |
877 | if ((((scancode >> 8) ^ ~scancode) & 0xff) == 0) | |
878 | return false; | |
879 | break; | |
880 | /* | |
881 | * If the customer code (top 32-bit) is 0x800f, it is MCE else it | |
882 | * is regular mode-6a 32 bit | |
883 | */ | |
884 | case RC_PROTO_RC6_MCE: | |
885 | if ((scancode & 0xffff0000) != 0x800f0000) | |
886 | return false; | |
887 | break; | |
888 | case RC_PROTO_RC6_6A_32: | |
889 | if ((scancode & 0xffff0000) == 0x800f0000) | |
890 | return false; | |
891 | break; | |
892 | default: | |
893 | break; | |
894 | } | |
895 | ||
896 | return true; | |
897 | } | |
898 | ||
899 | /** | |
900 | * rc_validate_filter() - checks that the scancode and mask are valid and | |
901 | * provides sensible defaults | |
902 | * @dev: the struct rc_dev descriptor of the device | |
903 | * @filter: the scancode and mask | |
904 | * | |
905 | * return: 0 or -EINVAL if the filter is not valid | |
906 | */ | |
907 | static int rc_validate_filter(struct rc_dev *dev, | |
908 | struct rc_scancode_filter *filter) | |
909 | { | |
910 | u32 mask, s = filter->data; | |
911 | enum rc_proto protocol = dev->wakeup_protocol; | |
912 | ||
913 | if (protocol >= ARRAY_SIZE(protocols)) | |
914 | return -EINVAL; | |
915 | ||
916 | mask = protocols[protocol].scancode_bits; | |
917 | ||
918 | if (!rc_validate_scancode(protocol, s)) | |
919 | return -EINVAL; | |
920 | ||
921 | filter->data &= mask; | |
922 | filter->mask &= mask; | |
923 | ||
924 | /* | |
925 | * If we have to raw encode the IR for wakeup, we cannot have a mask | |
926 | */ | |
927 | if (dev->encode_wakeup && filter->mask != 0 && filter->mask != mask) | |
928 | return -EINVAL; | |
929 | ||
930 | return 0; | |
931 | } | |
932 | ||
933 | int rc_open(struct rc_dev *rdev) | |
934 | { | |
935 | int rval = 0; | |
936 | ||
937 | if (!rdev) | |
938 | return -EINVAL; | |
939 | ||
940 | mutex_lock(&rdev->lock); | |
941 | ||
942 | if (!rdev->registered) { | |
943 | rval = -ENODEV; | |
944 | } else { | |
945 | if (!rdev->users++ && rdev->open) | |
946 | rval = rdev->open(rdev); | |
947 | ||
948 | if (rval) | |
949 | rdev->users--; | |
950 | } | |
951 | ||
952 | mutex_unlock(&rdev->lock); | |
953 | ||
954 | return rval; | |
955 | } | |
956 | ||
957 | static int ir_open(struct input_dev *idev) | |
958 | { | |
959 | struct rc_dev *rdev = input_get_drvdata(idev); | |
960 | ||
961 | return rc_open(rdev); | |
962 | } | |
963 | ||
964 | void rc_close(struct rc_dev *rdev) | |
965 | { | |
966 | if (rdev) { | |
967 | mutex_lock(&rdev->lock); | |
968 | ||
969 | if (!--rdev->users && rdev->close && rdev->registered) | |
970 | rdev->close(rdev); | |
971 | ||
972 | mutex_unlock(&rdev->lock); | |
973 | } | |
974 | } | |
975 | ||
976 | static void ir_close(struct input_dev *idev) | |
977 | { | |
978 | struct rc_dev *rdev = input_get_drvdata(idev); | |
979 | rc_close(rdev); | |
980 | } | |
981 | ||
982 | /* class for /sys/class/rc */ | |
983 | static char *rc_devnode(struct device *dev, umode_t *mode) | |
984 | { | |
985 | return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev)); | |
986 | } | |
987 | ||
988 | static struct class rc_class = { | |
989 | .name = "rc", | |
990 | .devnode = rc_devnode, | |
991 | }; | |
992 | ||
993 | /* | |
994 | * These are the protocol textual descriptions that are | |
995 | * used by the sysfs protocols file. Note that the order | |
996 | * of the entries is relevant. | |
997 | */ | |
998 | static const struct { | |
999 | u64 type; | |
1000 | const char *name; | |
1001 | const char *module_name; | |
1002 | } proto_names[] = { | |
1003 | { RC_PROTO_BIT_NONE, "none", NULL }, | |
1004 | { RC_PROTO_BIT_OTHER, "other", NULL }, | |
1005 | { RC_PROTO_BIT_UNKNOWN, "unknown", NULL }, | |
1006 | { RC_PROTO_BIT_RC5 | | |
1007 | RC_PROTO_BIT_RC5X_20, "rc-5", "ir-rc5-decoder" }, | |
1008 | { RC_PROTO_BIT_NEC | | |
1009 | RC_PROTO_BIT_NECX | | |
1010 | RC_PROTO_BIT_NEC32, "nec", "ir-nec-decoder" }, | |
1011 | { RC_PROTO_BIT_RC6_0 | | |
1012 | RC_PROTO_BIT_RC6_6A_20 | | |
1013 | RC_PROTO_BIT_RC6_6A_24 | | |
1014 | RC_PROTO_BIT_RC6_6A_32 | | |
1015 | RC_PROTO_BIT_RC6_MCE, "rc-6", "ir-rc6-decoder" }, | |
1016 | { RC_PROTO_BIT_JVC, "jvc", "ir-jvc-decoder" }, | |
1017 | { RC_PROTO_BIT_SONY12 | | |
1018 | RC_PROTO_BIT_SONY15 | | |
1019 | RC_PROTO_BIT_SONY20, "sony", "ir-sony-decoder" }, | |
1020 | { RC_PROTO_BIT_RC5_SZ, "rc-5-sz", "ir-rc5-decoder" }, | |
1021 | { RC_PROTO_BIT_SANYO, "sanyo", "ir-sanyo-decoder" }, | |
1022 | { RC_PROTO_BIT_SHARP, "sharp", "ir-sharp-decoder" }, | |
1023 | { RC_PROTO_BIT_MCIR2_KBD | | |
1024 | RC_PROTO_BIT_MCIR2_MSE, "mce_kbd", "ir-mce_kbd-decoder" }, | |
1025 | { RC_PROTO_BIT_XMP, "xmp", "ir-xmp-decoder" }, | |
1026 | { RC_PROTO_BIT_CEC, "cec", NULL }, | |
1027 | { RC_PROTO_BIT_IMON, "imon", "ir-imon-decoder" }, | |
1028 | { RC_PROTO_BIT_RCMM12 | | |
1029 | RC_PROTO_BIT_RCMM24 | | |
1030 | RC_PROTO_BIT_RCMM32, "rc-mm", "ir-rcmm-decoder" }, | |
1031 | { RC_PROTO_BIT_XBOX_DVD, "xbox-dvd", NULL }, | |
1032 | }; | |
1033 | ||
1034 | /** | |
1035 | * struct rc_filter_attribute - Device attribute relating to a filter type. | |
1036 | * @attr: Device attribute. | |
1037 | * @type: Filter type. | |
1038 | * @mask: false for filter value, true for filter mask. | |
1039 | */ | |
1040 | struct rc_filter_attribute { | |
1041 | struct device_attribute attr; | |
1042 | enum rc_filter_type type; | |
1043 | bool mask; | |
1044 | }; | |
1045 | #define to_rc_filter_attr(a) container_of(a, struct rc_filter_attribute, attr) | |
1046 | ||
1047 | #define RC_FILTER_ATTR(_name, _mode, _show, _store, _type, _mask) \ | |
1048 | struct rc_filter_attribute dev_attr_##_name = { \ | |
1049 | .attr = __ATTR(_name, _mode, _show, _store), \ | |
1050 | .type = (_type), \ | |
1051 | .mask = (_mask), \ | |
1052 | } | |
1053 | ||
1054 | /** | |
1055 | * show_protocols() - shows the current IR protocol(s) | |
1056 | * @device: the device descriptor | |
1057 | * @mattr: the device attribute struct | |
1058 | * @buf: a pointer to the output buffer | |
1059 | * | |
1060 | * This routine is a callback routine for input read the IR protocol type(s). | |
1061 | * it is triggered by reading /sys/class/rc/rc?/protocols. | |
1062 | * It returns the protocol names of supported protocols. | |
1063 | * Enabled protocols are printed in brackets. | |
1064 | * | |
1065 | * dev->lock is taken to guard against races between | |
1066 | * store_protocols and show_protocols. | |
1067 | */ | |
1068 | static ssize_t show_protocols(struct device *device, | |
1069 | struct device_attribute *mattr, char *buf) | |
1070 | { | |
1071 | struct rc_dev *dev = to_rc_dev(device); | |
1072 | u64 allowed, enabled; | |
1073 | char *tmp = buf; | |
1074 | int i; | |
1075 | ||
1076 | mutex_lock(&dev->lock); | |
1077 | ||
1078 | enabled = dev->enabled_protocols; | |
1079 | allowed = dev->allowed_protocols; | |
1080 | if (dev->raw && !allowed) | |
1081 | allowed = ir_raw_get_allowed_protocols(); | |
1082 | ||
1083 | mutex_unlock(&dev->lock); | |
1084 | ||
1085 | dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - 0x%llx\n", | |
1086 | __func__, (long long)allowed, (long long)enabled); | |
1087 | ||
1088 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
1089 | if (allowed & enabled & proto_names[i].type) | |
1090 | tmp += sprintf(tmp, "[%s] ", proto_names[i].name); | |
1091 | else if (allowed & proto_names[i].type) | |
1092 | tmp += sprintf(tmp, "%s ", proto_names[i].name); | |
1093 | ||
1094 | if (allowed & proto_names[i].type) | |
1095 | allowed &= ~proto_names[i].type; | |
1096 | } | |
1097 | ||
1098 | #ifdef CONFIG_LIRC | |
1099 | if (dev->driver_type == RC_DRIVER_IR_RAW) | |
1100 | tmp += sprintf(tmp, "[lirc] "); | |
1101 | #endif | |
1102 | ||
1103 | if (tmp != buf) | |
1104 | tmp--; | |
1105 | *tmp = '\n'; | |
1106 | ||
1107 | return tmp + 1 - buf; | |
1108 | } | |
1109 | ||
1110 | /** | |
1111 | * parse_protocol_change() - parses a protocol change request | |
1112 | * @dev: rc_dev device | |
1113 | * @protocols: pointer to the bitmask of current protocols | |
1114 | * @buf: pointer to the buffer with a list of changes | |
1115 | * | |
1116 | * Writing "+proto" will add a protocol to the protocol mask. | |
1117 | * Writing "-proto" will remove a protocol from protocol mask. | |
1118 | * Writing "proto" will enable only "proto". | |
1119 | * Writing "none" will disable all protocols. | |
1120 | * Returns the number of changes performed or a negative error code. | |
1121 | */ | |
1122 | static int parse_protocol_change(struct rc_dev *dev, u64 *protocols, | |
1123 | const char *buf) | |
1124 | { | |
1125 | const char *tmp; | |
1126 | unsigned count = 0; | |
1127 | bool enable, disable; | |
1128 | u64 mask; | |
1129 | int i; | |
1130 | ||
1131 | while ((tmp = strsep((char **)&buf, " \n")) != NULL) { | |
1132 | if (!*tmp) | |
1133 | break; | |
1134 | ||
1135 | if (*tmp == '+') { | |
1136 | enable = true; | |
1137 | disable = false; | |
1138 | tmp++; | |
1139 | } else if (*tmp == '-') { | |
1140 | enable = false; | |
1141 | disable = true; | |
1142 | tmp++; | |
1143 | } else { | |
1144 | enable = false; | |
1145 | disable = false; | |
1146 | } | |
1147 | ||
1148 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
1149 | if (!strcasecmp(tmp, proto_names[i].name)) { | |
1150 | mask = proto_names[i].type; | |
1151 | break; | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | if (i == ARRAY_SIZE(proto_names)) { | |
1156 | if (!strcasecmp(tmp, "lirc")) | |
1157 | mask = 0; | |
1158 | else { | |
1159 | dev_dbg(&dev->dev, "Unknown protocol: '%s'\n", | |
1160 | tmp); | |
1161 | return -EINVAL; | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | count++; | |
1166 | ||
1167 | if (enable) | |
1168 | *protocols |= mask; | |
1169 | else if (disable) | |
1170 | *protocols &= ~mask; | |
1171 | else | |
1172 | *protocols = mask; | |
1173 | } | |
1174 | ||
1175 | if (!count) { | |
1176 | dev_dbg(&dev->dev, "Protocol not specified\n"); | |
1177 | return -EINVAL; | |
1178 | } | |
1179 | ||
1180 | return count; | |
1181 | } | |
1182 | ||
1183 | void ir_raw_load_modules(u64 *protocols) | |
1184 | { | |
1185 | u64 available; | |
1186 | int i, ret; | |
1187 | ||
1188 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
1189 | if (proto_names[i].type == RC_PROTO_BIT_NONE || | |
1190 | proto_names[i].type & (RC_PROTO_BIT_OTHER | | |
1191 | RC_PROTO_BIT_UNKNOWN)) | |
1192 | continue; | |
1193 | ||
1194 | available = ir_raw_get_allowed_protocols(); | |
1195 | if (!(*protocols & proto_names[i].type & ~available)) | |
1196 | continue; | |
1197 | ||
1198 | if (!proto_names[i].module_name) { | |
1199 | pr_err("Can't enable IR protocol %s\n", | |
1200 | proto_names[i].name); | |
1201 | *protocols &= ~proto_names[i].type; | |
1202 | continue; | |
1203 | } | |
1204 | ||
1205 | ret = request_module("%s", proto_names[i].module_name); | |
1206 | if (ret < 0) { | |
1207 | pr_err("Couldn't load IR protocol module %s\n", | |
1208 | proto_names[i].module_name); | |
1209 | *protocols &= ~proto_names[i].type; | |
1210 | continue; | |
1211 | } | |
1212 | msleep(20); | |
1213 | available = ir_raw_get_allowed_protocols(); | |
1214 | if (!(*protocols & proto_names[i].type & ~available)) | |
1215 | continue; | |
1216 | ||
1217 | pr_err("Loaded IR protocol module %s, but protocol %s still not available\n", | |
1218 | proto_names[i].module_name, | |
1219 | proto_names[i].name); | |
1220 | *protocols &= ~proto_names[i].type; | |
1221 | } | |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * store_protocols() - changes the current/wakeup IR protocol(s) | |
1226 | * @device: the device descriptor | |
1227 | * @mattr: the device attribute struct | |
1228 | * @buf: a pointer to the input buffer | |
1229 | * @len: length of the input buffer | |
1230 | * | |
1231 | * This routine is for changing the IR protocol type. | |
1232 | * It is triggered by writing to /sys/class/rc/rc?/[wakeup_]protocols. | |
1233 | * See parse_protocol_change() for the valid commands. | |
1234 | * Returns @len on success or a negative error code. | |
1235 | * | |
1236 | * dev->lock is taken to guard against races between | |
1237 | * store_protocols and show_protocols. | |
1238 | */ | |
1239 | static ssize_t store_protocols(struct device *device, | |
1240 | struct device_attribute *mattr, | |
1241 | const char *buf, size_t len) | |
1242 | { | |
1243 | struct rc_dev *dev = to_rc_dev(device); | |
1244 | u64 *current_protocols; | |
1245 | struct rc_scancode_filter *filter; | |
1246 | u64 old_protocols, new_protocols; | |
1247 | ssize_t rc; | |
1248 | ||
1249 | dev_dbg(&dev->dev, "Normal protocol change requested\n"); | |
1250 | current_protocols = &dev->enabled_protocols; | |
1251 | filter = &dev->scancode_filter; | |
1252 | ||
1253 | if (!dev->change_protocol) { | |
1254 | dev_dbg(&dev->dev, "Protocol switching not supported\n"); | |
1255 | return -EINVAL; | |
1256 | } | |
1257 | ||
1258 | mutex_lock(&dev->lock); | |
1259 | ||
1260 | old_protocols = *current_protocols; | |
1261 | new_protocols = old_protocols; | |
1262 | rc = parse_protocol_change(dev, &new_protocols, buf); | |
1263 | if (rc < 0) | |
1264 | goto out; | |
1265 | ||
1266 | if (dev->driver_type == RC_DRIVER_IR_RAW) | |
1267 | ir_raw_load_modules(&new_protocols); | |
1268 | ||
1269 | rc = dev->change_protocol(dev, &new_protocols); | |
1270 | if (rc < 0) { | |
1271 | dev_dbg(&dev->dev, "Error setting protocols to 0x%llx\n", | |
1272 | (long long)new_protocols); | |
1273 | goto out; | |
1274 | } | |
1275 | ||
1276 | if (new_protocols != old_protocols) { | |
1277 | *current_protocols = new_protocols; | |
1278 | dev_dbg(&dev->dev, "Protocols changed to 0x%llx\n", | |
1279 | (long long)new_protocols); | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * If a protocol change was attempted the filter may need updating, even | |
1284 | * if the actual protocol mask hasn't changed (since the driver may have | |
1285 | * cleared the filter). | |
1286 | * Try setting the same filter with the new protocol (if any). | |
1287 | * Fall back to clearing the filter. | |
1288 | */ | |
1289 | if (dev->s_filter && filter->mask) { | |
1290 | if (new_protocols) | |
1291 | rc = dev->s_filter(dev, filter); | |
1292 | else | |
1293 | rc = -1; | |
1294 | ||
1295 | if (rc < 0) { | |
1296 | filter->data = 0; | |
1297 | filter->mask = 0; | |
1298 | dev->s_filter(dev, filter); | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | rc = len; | |
1303 | ||
1304 | out: | |
1305 | mutex_unlock(&dev->lock); | |
1306 | return rc; | |
1307 | } | |
1308 | ||
1309 | /** | |
1310 | * show_filter() - shows the current scancode filter value or mask | |
1311 | * @device: the device descriptor | |
1312 | * @attr: the device attribute struct | |
1313 | * @buf: a pointer to the output buffer | |
1314 | * | |
1315 | * This routine is a callback routine to read a scancode filter value or mask. | |
1316 | * It is triggered by reading /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1317 | * It prints the current scancode filter value or mask of the appropriate filter | |
1318 | * type in hexadecimal into @buf and returns the size of the buffer. | |
1319 | * | |
1320 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1321 | * compared against input scancodes and non-matching scancodes are discarded. | |
1322 | * | |
1323 | * dev->lock is taken to guard against races between | |
1324 | * store_filter and show_filter. | |
1325 | */ | |
1326 | static ssize_t show_filter(struct device *device, | |
1327 | struct device_attribute *attr, | |
1328 | char *buf) | |
1329 | { | |
1330 | struct rc_dev *dev = to_rc_dev(device); | |
1331 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
1332 | struct rc_scancode_filter *filter; | |
1333 | u32 val; | |
1334 | ||
1335 | mutex_lock(&dev->lock); | |
1336 | ||
1337 | if (fattr->type == RC_FILTER_NORMAL) | |
1338 | filter = &dev->scancode_filter; | |
1339 | else | |
1340 | filter = &dev->scancode_wakeup_filter; | |
1341 | ||
1342 | if (fattr->mask) | |
1343 | val = filter->mask; | |
1344 | else | |
1345 | val = filter->data; | |
1346 | mutex_unlock(&dev->lock); | |
1347 | ||
1348 | return sprintf(buf, "%#x\n", val); | |
1349 | } | |
1350 | ||
1351 | /** | |
1352 | * store_filter() - changes the scancode filter value | |
1353 | * @device: the device descriptor | |
1354 | * @attr: the device attribute struct | |
1355 | * @buf: a pointer to the input buffer | |
1356 | * @len: length of the input buffer | |
1357 | * | |
1358 | * This routine is for changing a scancode filter value or mask. | |
1359 | * It is triggered by writing to /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1360 | * Returns -EINVAL if an invalid filter value for the current protocol was | |
1361 | * specified or if scancode filtering is not supported by the driver, otherwise | |
1362 | * returns @len. | |
1363 | * | |
1364 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1365 | * compared against input scancodes and non-matching scancodes are discarded. | |
1366 | * | |
1367 | * dev->lock is taken to guard against races between | |
1368 | * store_filter and show_filter. | |
1369 | */ | |
1370 | static ssize_t store_filter(struct device *device, | |
1371 | struct device_attribute *attr, | |
1372 | const char *buf, size_t len) | |
1373 | { | |
1374 | struct rc_dev *dev = to_rc_dev(device); | |
1375 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
1376 | struct rc_scancode_filter new_filter, *filter; | |
1377 | int ret; | |
1378 | unsigned long val; | |
1379 | int (*set_filter)(struct rc_dev *dev, struct rc_scancode_filter *filter); | |
1380 | ||
1381 | ret = kstrtoul(buf, 0, &val); | |
1382 | if (ret < 0) | |
1383 | return ret; | |
1384 | ||
1385 | if (fattr->type == RC_FILTER_NORMAL) { | |
1386 | set_filter = dev->s_filter; | |
1387 | filter = &dev->scancode_filter; | |
1388 | } else { | |
1389 | set_filter = dev->s_wakeup_filter; | |
1390 | filter = &dev->scancode_wakeup_filter; | |
1391 | } | |
1392 | ||
1393 | if (!set_filter) | |
1394 | return -EINVAL; | |
1395 | ||
1396 | mutex_lock(&dev->lock); | |
1397 | ||
1398 | new_filter = *filter; | |
1399 | if (fattr->mask) | |
1400 | new_filter.mask = val; | |
1401 | else | |
1402 | new_filter.data = val; | |
1403 | ||
1404 | if (fattr->type == RC_FILTER_WAKEUP) { | |
1405 | /* | |
1406 | * Refuse to set a filter unless a protocol is enabled | |
1407 | * and the filter is valid for that protocol | |
1408 | */ | |
1409 | if (dev->wakeup_protocol != RC_PROTO_UNKNOWN) | |
1410 | ret = rc_validate_filter(dev, &new_filter); | |
1411 | else | |
1412 | ret = -EINVAL; | |
1413 | ||
1414 | if (ret != 0) | |
1415 | goto unlock; | |
1416 | } | |
1417 | ||
1418 | if (fattr->type == RC_FILTER_NORMAL && !dev->enabled_protocols && | |
1419 | val) { | |
1420 | /* refuse to set a filter unless a protocol is enabled */ | |
1421 | ret = -EINVAL; | |
1422 | goto unlock; | |
1423 | } | |
1424 | ||
1425 | ret = set_filter(dev, &new_filter); | |
1426 | if (ret < 0) | |
1427 | goto unlock; | |
1428 | ||
1429 | *filter = new_filter; | |
1430 | ||
1431 | unlock: | |
1432 | mutex_unlock(&dev->lock); | |
1433 | return (ret < 0) ? ret : len; | |
1434 | } | |
1435 | ||
1436 | /** | |
1437 | * show_wakeup_protocols() - shows the wakeup IR protocol | |
1438 | * @device: the device descriptor | |
1439 | * @mattr: the device attribute struct | |
1440 | * @buf: a pointer to the output buffer | |
1441 | * | |
1442 | * This routine is a callback routine for input read the IR protocol type(s). | |
1443 | * it is triggered by reading /sys/class/rc/rc?/wakeup_protocols. | |
1444 | * It returns the protocol names of supported protocols. | |
1445 | * The enabled protocols are printed in brackets. | |
1446 | * | |
1447 | * dev->lock is taken to guard against races between | |
1448 | * store_wakeup_protocols and show_wakeup_protocols. | |
1449 | */ | |
1450 | static ssize_t show_wakeup_protocols(struct device *device, | |
1451 | struct device_attribute *mattr, | |
1452 | char *buf) | |
1453 | { | |
1454 | struct rc_dev *dev = to_rc_dev(device); | |
1455 | u64 allowed; | |
1456 | enum rc_proto enabled; | |
1457 | char *tmp = buf; | |
1458 | int i; | |
1459 | ||
1460 | mutex_lock(&dev->lock); | |
1461 | ||
1462 | allowed = dev->allowed_wakeup_protocols; | |
1463 | enabled = dev->wakeup_protocol; | |
1464 | ||
1465 | mutex_unlock(&dev->lock); | |
1466 | ||
1467 | dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - %d\n", | |
1468 | __func__, (long long)allowed, enabled); | |
1469 | ||
1470 | for (i = 0; i < ARRAY_SIZE(protocols); i++) { | |
1471 | if (allowed & (1ULL << i)) { | |
1472 | if (i == enabled) | |
1473 | tmp += sprintf(tmp, "[%s] ", protocols[i].name); | |
1474 | else | |
1475 | tmp += sprintf(tmp, "%s ", protocols[i].name); | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | if (tmp != buf) | |
1480 | tmp--; | |
1481 | *tmp = '\n'; | |
1482 | ||
1483 | return tmp + 1 - buf; | |
1484 | } | |
1485 | ||
1486 | /** | |
1487 | * store_wakeup_protocols() - changes the wakeup IR protocol(s) | |
1488 | * @device: the device descriptor | |
1489 | * @mattr: the device attribute struct | |
1490 | * @buf: a pointer to the input buffer | |
1491 | * @len: length of the input buffer | |
1492 | * | |
1493 | * This routine is for changing the IR protocol type. | |
1494 | * It is triggered by writing to /sys/class/rc/rc?/wakeup_protocols. | |
1495 | * Returns @len on success or a negative error code. | |
1496 | * | |
1497 | * dev->lock is taken to guard against races between | |
1498 | * store_wakeup_protocols and show_wakeup_protocols. | |
1499 | */ | |
1500 | static ssize_t store_wakeup_protocols(struct device *device, | |
1501 | struct device_attribute *mattr, | |
1502 | const char *buf, size_t len) | |
1503 | { | |
1504 | struct rc_dev *dev = to_rc_dev(device); | |
1505 | enum rc_proto protocol = RC_PROTO_UNKNOWN; | |
1506 | ssize_t rc; | |
1507 | u64 allowed; | |
1508 | int i; | |
1509 | ||
1510 | mutex_lock(&dev->lock); | |
1511 | ||
1512 | allowed = dev->allowed_wakeup_protocols; | |
1513 | ||
1514 | if (!sysfs_streq(buf, "none")) { | |
1515 | for (i = 0; i < ARRAY_SIZE(protocols); i++) { | |
1516 | if ((allowed & (1ULL << i)) && | |
1517 | sysfs_streq(buf, protocols[i].name)) { | |
1518 | protocol = i; | |
1519 | break; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | if (i == ARRAY_SIZE(protocols)) { | |
1524 | rc = -EINVAL; | |
1525 | goto out; | |
1526 | } | |
1527 | ||
1528 | if (dev->encode_wakeup) { | |
1529 | u64 mask = 1ULL << protocol; | |
1530 | ||
1531 | ir_raw_load_modules(&mask); | |
1532 | if (!mask) { | |
1533 | rc = -EINVAL; | |
1534 | goto out; | |
1535 | } | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | if (dev->wakeup_protocol != protocol) { | |
1540 | dev->wakeup_protocol = protocol; | |
1541 | dev_dbg(&dev->dev, "Wakeup protocol changed to %d\n", protocol); | |
1542 | ||
1543 | if (protocol == RC_PROTO_RC6_MCE) | |
1544 | dev->scancode_wakeup_filter.data = 0x800f0000; | |
1545 | else | |
1546 | dev->scancode_wakeup_filter.data = 0; | |
1547 | dev->scancode_wakeup_filter.mask = 0; | |
1548 | ||
1549 | rc = dev->s_wakeup_filter(dev, &dev->scancode_wakeup_filter); | |
1550 | if (rc == 0) | |
1551 | rc = len; | |
1552 | } else { | |
1553 | rc = len; | |
1554 | } | |
1555 | ||
1556 | out: | |
1557 | mutex_unlock(&dev->lock); | |
1558 | return rc; | |
1559 | } | |
1560 | ||
1561 | static void rc_dev_release(struct device *device) | |
1562 | { | |
1563 | struct rc_dev *dev = to_rc_dev(device); | |
1564 | ||
1565 | kfree(dev); | |
1566 | } | |
1567 | ||
1568 | #define ADD_HOTPLUG_VAR(fmt, val...) \ | |
1569 | do { \ | |
1570 | int err = add_uevent_var(env, fmt, val); \ | |
1571 | if (err) \ | |
1572 | return err; \ | |
1573 | } while (0) | |
1574 | ||
1575 | static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) | |
1576 | { | |
1577 | struct rc_dev *dev = to_rc_dev(device); | |
1578 | ||
1579 | if (dev->rc_map.name) | |
1580 | ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name); | |
1581 | if (dev->driver_name) | |
1582 | ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name); | |
1583 | if (dev->device_name) | |
1584 | ADD_HOTPLUG_VAR("DEV_NAME=%s", dev->device_name); | |
1585 | ||
1586 | return 0; | |
1587 | } | |
1588 | ||
1589 | /* | |
1590 | * Static device attribute struct with the sysfs attributes for IR's | |
1591 | */ | |
1592 | static struct device_attribute dev_attr_ro_protocols = | |
1593 | __ATTR(protocols, 0444, show_protocols, NULL); | |
1594 | static struct device_attribute dev_attr_rw_protocols = | |
1595 | __ATTR(protocols, 0644, show_protocols, store_protocols); | |
1596 | static DEVICE_ATTR(wakeup_protocols, 0644, show_wakeup_protocols, | |
1597 | store_wakeup_protocols); | |
1598 | static RC_FILTER_ATTR(filter, S_IRUGO|S_IWUSR, | |
1599 | show_filter, store_filter, RC_FILTER_NORMAL, false); | |
1600 | static RC_FILTER_ATTR(filter_mask, S_IRUGO|S_IWUSR, | |
1601 | show_filter, store_filter, RC_FILTER_NORMAL, true); | |
1602 | static RC_FILTER_ATTR(wakeup_filter, S_IRUGO|S_IWUSR, | |
1603 | show_filter, store_filter, RC_FILTER_WAKEUP, false); | |
1604 | static RC_FILTER_ATTR(wakeup_filter_mask, S_IRUGO|S_IWUSR, | |
1605 | show_filter, store_filter, RC_FILTER_WAKEUP, true); | |
1606 | ||
1607 | static struct attribute *rc_dev_rw_protocol_attrs[] = { | |
1608 | &dev_attr_rw_protocols.attr, | |
1609 | NULL, | |
1610 | }; | |
1611 | ||
1612 | static const struct attribute_group rc_dev_rw_protocol_attr_grp = { | |
1613 | .attrs = rc_dev_rw_protocol_attrs, | |
1614 | }; | |
1615 | ||
1616 | static struct attribute *rc_dev_ro_protocol_attrs[] = { | |
1617 | &dev_attr_ro_protocols.attr, | |
1618 | NULL, | |
1619 | }; | |
1620 | ||
1621 | static const struct attribute_group rc_dev_ro_protocol_attr_grp = { | |
1622 | .attrs = rc_dev_ro_protocol_attrs, | |
1623 | }; | |
1624 | ||
1625 | static struct attribute *rc_dev_filter_attrs[] = { | |
1626 | &dev_attr_filter.attr.attr, | |
1627 | &dev_attr_filter_mask.attr.attr, | |
1628 | NULL, | |
1629 | }; | |
1630 | ||
1631 | static const struct attribute_group rc_dev_filter_attr_grp = { | |
1632 | .attrs = rc_dev_filter_attrs, | |
1633 | }; | |
1634 | ||
1635 | static struct attribute *rc_dev_wakeup_filter_attrs[] = { | |
1636 | &dev_attr_wakeup_filter.attr.attr, | |
1637 | &dev_attr_wakeup_filter_mask.attr.attr, | |
1638 | &dev_attr_wakeup_protocols.attr, | |
1639 | NULL, | |
1640 | }; | |
1641 | ||
1642 | static const struct attribute_group rc_dev_wakeup_filter_attr_grp = { | |
1643 | .attrs = rc_dev_wakeup_filter_attrs, | |
1644 | }; | |
1645 | ||
1646 | static const struct device_type rc_dev_type = { | |
1647 | .release = rc_dev_release, | |
1648 | .uevent = rc_dev_uevent, | |
1649 | }; | |
1650 | ||
1651 | struct rc_dev *rc_allocate_device(enum rc_driver_type type) | |
1652 | { | |
1653 | struct rc_dev *dev; | |
1654 | ||
1655 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
1656 | if (!dev) | |
1657 | return NULL; | |
1658 | ||
1659 | if (type != RC_DRIVER_IR_RAW_TX) { | |
1660 | dev->input_dev = input_allocate_device(); | |
1661 | if (!dev->input_dev) { | |
1662 | kfree(dev); | |
1663 | return NULL; | |
1664 | } | |
1665 | ||
1666 | dev->input_dev->getkeycode = ir_getkeycode; | |
1667 | dev->input_dev->setkeycode = ir_setkeycode; | |
1668 | input_set_drvdata(dev->input_dev, dev); | |
1669 | ||
1670 | dev->timeout = IR_DEFAULT_TIMEOUT; | |
1671 | timer_setup(&dev->timer_keyup, ir_timer_keyup, 0); | |
1672 | timer_setup(&dev->timer_repeat, ir_timer_repeat, 0); | |
1673 | ||
1674 | spin_lock_init(&dev->rc_map.lock); | |
1675 | spin_lock_init(&dev->keylock); | |
1676 | } | |
1677 | mutex_init(&dev->lock); | |
1678 | ||
1679 | dev->dev.type = &rc_dev_type; | |
1680 | dev->dev.class = &rc_class; | |
1681 | device_initialize(&dev->dev); | |
1682 | ||
1683 | dev->driver_type = type; | |
1684 | ||
1685 | __module_get(THIS_MODULE); | |
1686 | return dev; | |
1687 | } | |
1688 | EXPORT_SYMBOL_GPL(rc_allocate_device); | |
1689 | ||
1690 | void rc_free_device(struct rc_dev *dev) | |
1691 | { | |
1692 | if (!dev) | |
1693 | return; | |
1694 | ||
1695 | input_free_device(dev->input_dev); | |
1696 | ||
1697 | put_device(&dev->dev); | |
1698 | ||
1699 | /* kfree(dev) will be called by the callback function | |
1700 | rc_dev_release() */ | |
1701 | ||
1702 | module_put(THIS_MODULE); | |
1703 | } | |
1704 | EXPORT_SYMBOL_GPL(rc_free_device); | |
1705 | ||
1706 | static void devm_rc_alloc_release(struct device *dev, void *res) | |
1707 | { | |
1708 | rc_free_device(*(struct rc_dev **)res); | |
1709 | } | |
1710 | ||
1711 | struct rc_dev *devm_rc_allocate_device(struct device *dev, | |
1712 | enum rc_driver_type type) | |
1713 | { | |
1714 | struct rc_dev **dr, *rc; | |
1715 | ||
1716 | dr = devres_alloc(devm_rc_alloc_release, sizeof(*dr), GFP_KERNEL); | |
1717 | if (!dr) | |
1718 | return NULL; | |
1719 | ||
1720 | rc = rc_allocate_device(type); | |
1721 | if (!rc) { | |
1722 | devres_free(dr); | |
1723 | return NULL; | |
1724 | } | |
1725 | ||
1726 | rc->dev.parent = dev; | |
1727 | rc->managed_alloc = true; | |
1728 | *dr = rc; | |
1729 | devres_add(dev, dr); | |
1730 | ||
1731 | return rc; | |
1732 | } | |
1733 | EXPORT_SYMBOL_GPL(devm_rc_allocate_device); | |
1734 | ||
1735 | static int rc_prepare_rx_device(struct rc_dev *dev) | |
1736 | { | |
1737 | int rc; | |
1738 | struct rc_map *rc_map; | |
1739 | u64 rc_proto; | |
1740 | ||
1741 | if (!dev->map_name) | |
1742 | return -EINVAL; | |
1743 | ||
1744 | rc_map = rc_map_get(dev->map_name); | |
1745 | if (!rc_map) | |
1746 | rc_map = rc_map_get(RC_MAP_EMPTY); | |
1747 | if (!rc_map || !rc_map->scan || rc_map->size == 0) | |
1748 | return -EINVAL; | |
1749 | ||
1750 | rc = ir_setkeytable(dev, rc_map); | |
1751 | if (rc) | |
1752 | return rc; | |
1753 | ||
1754 | rc_proto = BIT_ULL(rc_map->rc_proto); | |
1755 | ||
1756 | if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol) | |
1757 | dev->enabled_protocols = dev->allowed_protocols; | |
1758 | ||
1759 | if (dev->driver_type == RC_DRIVER_IR_RAW) | |
1760 | ir_raw_load_modules(&rc_proto); | |
1761 | ||
1762 | if (dev->change_protocol) { | |
1763 | rc = dev->change_protocol(dev, &rc_proto); | |
1764 | if (rc < 0) | |
1765 | goto out_table; | |
1766 | dev->enabled_protocols = rc_proto; | |
1767 | } | |
1768 | ||
1769 | /* Keyboard events */ | |
1770 | set_bit(EV_KEY, dev->input_dev->evbit); | |
1771 | set_bit(EV_REP, dev->input_dev->evbit); | |
1772 | set_bit(EV_MSC, dev->input_dev->evbit); | |
1773 | set_bit(MSC_SCAN, dev->input_dev->mscbit); | |
1774 | ||
1775 | /* Pointer/mouse events */ | |
1776 | set_bit(INPUT_PROP_POINTING_STICK, dev->input_dev->propbit); | |
1777 | set_bit(EV_REL, dev->input_dev->evbit); | |
1778 | set_bit(REL_X, dev->input_dev->relbit); | |
1779 | set_bit(REL_Y, dev->input_dev->relbit); | |
1780 | ||
1781 | if (dev->open) | |
1782 | dev->input_dev->open = ir_open; | |
1783 | if (dev->close) | |
1784 | dev->input_dev->close = ir_close; | |
1785 | ||
1786 | dev->input_dev->dev.parent = &dev->dev; | |
1787 | memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id)); | |
1788 | dev->input_dev->phys = dev->input_phys; | |
1789 | dev->input_dev->name = dev->device_name; | |
1790 | ||
1791 | return 0; | |
1792 | ||
1793 | out_table: | |
1794 | ir_free_table(&dev->rc_map); | |
1795 | ||
1796 | return rc; | |
1797 | } | |
1798 | ||
1799 | static int rc_setup_rx_device(struct rc_dev *dev) | |
1800 | { | |
1801 | int rc; | |
1802 | ||
1803 | /* rc_open will be called here */ | |
1804 | rc = input_register_device(dev->input_dev); | |
1805 | if (rc) | |
1806 | return rc; | |
1807 | ||
1808 | /* | |
1809 | * Default delay of 250ms is too short for some protocols, especially | |
1810 | * since the timeout is currently set to 250ms. Increase it to 500ms, | |
1811 | * to avoid wrong repetition of the keycodes. Note that this must be | |
1812 | * set after the call to input_register_device(). | |
1813 | */ | |
1814 | if (dev->allowed_protocols == RC_PROTO_BIT_CEC) | |
1815 | dev->input_dev->rep[REP_DELAY] = 0; | |
1816 | else | |
1817 | dev->input_dev->rep[REP_DELAY] = 500; | |
1818 | ||
1819 | /* | |
1820 | * As a repeat event on protocols like RC-5 and NEC take as long as | |
1821 | * 110/114ms, using 33ms as a repeat period is not the right thing | |
1822 | * to do. | |
1823 | */ | |
1824 | dev->input_dev->rep[REP_PERIOD] = 125; | |
1825 | ||
1826 | return 0; | |
1827 | } | |
1828 | ||
1829 | static void rc_free_rx_device(struct rc_dev *dev) | |
1830 | { | |
1831 | if (!dev) | |
1832 | return; | |
1833 | ||
1834 | if (dev->input_dev) { | |
1835 | input_unregister_device(dev->input_dev); | |
1836 | dev->input_dev = NULL; | |
1837 | } | |
1838 | ||
1839 | ir_free_table(&dev->rc_map); | |
1840 | } | |
1841 | ||
1842 | int rc_register_device(struct rc_dev *dev) | |
1843 | { | |
1844 | const char *path; | |
1845 | int attr = 0; | |
1846 | int minor; | |
1847 | int rc; | |
1848 | ||
1849 | if (!dev) | |
1850 | return -EINVAL; | |
1851 | ||
1852 | minor = ida_simple_get(&rc_ida, 0, RC_DEV_MAX, GFP_KERNEL); | |
1853 | if (minor < 0) | |
1854 | return minor; | |
1855 | ||
1856 | dev->minor = minor; | |
1857 | dev_set_name(&dev->dev, "rc%u", dev->minor); | |
1858 | dev_set_drvdata(&dev->dev, dev); | |
1859 | ||
1860 | dev->dev.groups = dev->sysfs_groups; | |
1861 | if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol) | |
1862 | dev->sysfs_groups[attr++] = &rc_dev_ro_protocol_attr_grp; | |
1863 | else if (dev->driver_type != RC_DRIVER_IR_RAW_TX) | |
1864 | dev->sysfs_groups[attr++] = &rc_dev_rw_protocol_attr_grp; | |
1865 | if (dev->s_filter) | |
1866 | dev->sysfs_groups[attr++] = &rc_dev_filter_attr_grp; | |
1867 | if (dev->s_wakeup_filter) | |
1868 | dev->sysfs_groups[attr++] = &rc_dev_wakeup_filter_attr_grp; | |
1869 | dev->sysfs_groups[attr++] = NULL; | |
1870 | ||
1871 | if (dev->driver_type == RC_DRIVER_IR_RAW) { | |
1872 | rc = ir_raw_event_prepare(dev); | |
1873 | if (rc < 0) | |
1874 | goto out_minor; | |
1875 | } | |
1876 | ||
1877 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { | |
1878 | rc = rc_prepare_rx_device(dev); | |
1879 | if (rc) | |
1880 | goto out_raw; | |
1881 | } | |
1882 | ||
1883 | rc = device_add(&dev->dev); | |
1884 | if (rc) | |
1885 | goto out_rx_free; | |
1886 | ||
1887 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); | |
1888 | dev_info(&dev->dev, "%s as %s\n", | |
1889 | dev->device_name ?: "Unspecified device", path ?: "N/A"); | |
1890 | kfree(path); | |
1891 | ||
1892 | dev->registered = true; | |
1893 | ||
1894 | /* | |
1895 | * once the the input device is registered in rc_setup_rx_device, | |
1896 | * userspace can open the input device and rc_open() will be called | |
1897 | * as a result. This results in driver code being allowed to submit | |
1898 | * keycodes with rc_keydown, so lirc must be registered first. | |
1899 | */ | |
1900 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) { | |
1901 | rc = ir_lirc_register(dev); | |
1902 | if (rc < 0) | |
1903 | goto out_dev; | |
1904 | } | |
1905 | ||
1906 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { | |
1907 | rc = rc_setup_rx_device(dev); | |
1908 | if (rc) | |
1909 | goto out_lirc; | |
1910 | } | |
1911 | ||
1912 | if (dev->driver_type == RC_DRIVER_IR_RAW) { | |
1913 | rc = ir_raw_event_register(dev); | |
1914 | if (rc < 0) | |
1915 | goto out_rx; | |
1916 | } | |
1917 | ||
1918 | dev_dbg(&dev->dev, "Registered rc%u (driver: %s)\n", dev->minor, | |
1919 | dev->driver_name ? dev->driver_name : "unknown"); | |
1920 | ||
1921 | return 0; | |
1922 | ||
1923 | out_rx: | |
1924 | rc_free_rx_device(dev); | |
1925 | out_lirc: | |
1926 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) | |
1927 | ir_lirc_unregister(dev); | |
1928 | out_dev: | |
1929 | device_del(&dev->dev); | |
1930 | out_rx_free: | |
1931 | ir_free_table(&dev->rc_map); | |
1932 | out_raw: | |
1933 | ir_raw_event_free(dev); | |
1934 | out_minor: | |
1935 | ida_simple_remove(&rc_ida, minor); | |
1936 | return rc; | |
1937 | } | |
1938 | EXPORT_SYMBOL_GPL(rc_register_device); | |
1939 | ||
1940 | static void devm_rc_release(struct device *dev, void *res) | |
1941 | { | |
1942 | rc_unregister_device(*(struct rc_dev **)res); | |
1943 | } | |
1944 | ||
1945 | int devm_rc_register_device(struct device *parent, struct rc_dev *dev) | |
1946 | { | |
1947 | struct rc_dev **dr; | |
1948 | int ret; | |
1949 | ||
1950 | dr = devres_alloc(devm_rc_release, sizeof(*dr), GFP_KERNEL); | |
1951 | if (!dr) | |
1952 | return -ENOMEM; | |
1953 | ||
1954 | ret = rc_register_device(dev); | |
1955 | if (ret) { | |
1956 | devres_free(dr); | |
1957 | return ret; | |
1958 | } | |
1959 | ||
1960 | *dr = dev; | |
1961 | devres_add(parent, dr); | |
1962 | ||
1963 | return 0; | |
1964 | } | |
1965 | EXPORT_SYMBOL_GPL(devm_rc_register_device); | |
1966 | ||
1967 | void rc_unregister_device(struct rc_dev *dev) | |
1968 | { | |
1969 | if (!dev) | |
1970 | return; | |
1971 | ||
1972 | if (dev->driver_type == RC_DRIVER_IR_RAW) | |
1973 | ir_raw_event_unregister(dev); | |
1974 | ||
1975 | del_timer_sync(&dev->timer_keyup); | |
1976 | del_timer_sync(&dev->timer_repeat); | |
1977 | ||
1978 | rc_free_rx_device(dev); | |
1979 | ||
1980 | mutex_lock(&dev->lock); | |
1981 | if (dev->users && dev->close) | |
1982 | dev->close(dev); | |
1983 | dev->registered = false; | |
1984 | mutex_unlock(&dev->lock); | |
1985 | ||
1986 | /* | |
1987 | * lirc device should be freed with dev->registered = false, so | |
1988 | * that userspace polling will get notified. | |
1989 | */ | |
1990 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) | |
1991 | ir_lirc_unregister(dev); | |
1992 | ||
1993 | device_del(&dev->dev); | |
1994 | ||
1995 | ida_simple_remove(&rc_ida, dev->minor); | |
1996 | ||
1997 | if (!dev->managed_alloc) | |
1998 | rc_free_device(dev); | |
1999 | } | |
2000 | ||
2001 | EXPORT_SYMBOL_GPL(rc_unregister_device); | |
2002 | ||
2003 | /* | |
2004 | * Init/exit code for the module. Basically, creates/removes /sys/class/rc | |
2005 | */ | |
2006 | ||
2007 | static int __init rc_core_init(void) | |
2008 | { | |
2009 | int rc = class_register(&rc_class); | |
2010 | if (rc) { | |
2011 | pr_err("rc_core: unable to register rc class\n"); | |
2012 | return rc; | |
2013 | } | |
2014 | ||
2015 | rc = lirc_dev_init(); | |
2016 | if (rc) { | |
2017 | pr_err("rc_core: unable to init lirc\n"); | |
2018 | class_unregister(&rc_class); | |
2019 | return 0; | |
2020 | } | |
2021 | ||
2022 | led_trigger_register_simple("rc-feedback", &led_feedback); | |
2023 | rc_map_register(&empty_map); | |
2024 | ||
2025 | return 0; | |
2026 | } | |
2027 | ||
2028 | static void __exit rc_core_exit(void) | |
2029 | { | |
2030 | lirc_dev_exit(); | |
2031 | class_unregister(&rc_class); | |
2032 | led_trigger_unregister_simple(led_feedback); | |
2033 | rc_map_unregister(&empty_map); | |
2034 | } | |
2035 | ||
2036 | subsys_initcall(rc_core_init); | |
2037 | module_exit(rc_core_exit); | |
2038 | ||
2039 | MODULE_AUTHOR("Mauro Carvalho Chehab"); | |
2040 | MODULE_LICENSE("GPL v2"); |