Commit | Line | Data |
---|---|---|
829ba9fe | 1 | /* rc-main.c - Remote Controller core module |
ef53a115 | 2 | * |
bc2a6c57 | 3 | * Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com> |
446e4a64 MCC |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation version 2 of the License. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
ef53a115 MCC |
13 | */ |
14 | ||
6bda9644 | 15 | #include <media/rc-core.h> |
631493ec MCC |
16 | #include <linux/spinlock.h> |
17 | #include <linux/delay.h> | |
882ead32 | 18 | #include <linux/input.h> |
153a60bb | 19 | #include <linux/leds.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
bc2a6c57 | 21 | #include <linux/device.h> |
7a707b89 | 22 | #include <linux/module.h> |
f62de675 | 23 | #include "rc-core-priv.h" |
ef53a115 | 24 | |
b3074c0a DH |
25 | /* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */ |
26 | #define IR_TAB_MIN_SIZE 256 | |
27 | #define IR_TAB_MAX_SIZE 8192 | |
f6fc5049 | 28 | |
a374fef4 DH |
29 | /* FIXME: IR_KEYPRESS_TIMEOUT should be protocol specific */ |
30 | #define IR_KEYPRESS_TIMEOUT 250 | |
31 | ||
4c7b355d | 32 | /* Used to keep track of known keymaps */ |
631493ec MCC |
33 | static LIST_HEAD(rc_map_list); |
34 | static DEFINE_SPINLOCK(rc_map_lock); | |
153a60bb | 35 | static struct led_trigger *led_feedback; |
631493ec | 36 | |
d100e659 | 37 | static struct rc_map_list *seek_rc_map(const char *name) |
631493ec | 38 | { |
d100e659 | 39 | struct rc_map_list *map = NULL; |
631493ec MCC |
40 | |
41 | spin_lock(&rc_map_lock); | |
42 | list_for_each_entry(map, &rc_map_list, list) { | |
43 | if (!strcmp(name, map->map.name)) { | |
44 | spin_unlock(&rc_map_lock); | |
45 | return map; | |
46 | } | |
47 | } | |
48 | spin_unlock(&rc_map_lock); | |
49 | ||
50 | return NULL; | |
51 | } | |
52 | ||
d100e659 | 53 | struct rc_map *rc_map_get(const char *name) |
631493ec MCC |
54 | { |
55 | ||
d100e659 | 56 | struct rc_map_list *map; |
631493ec MCC |
57 | |
58 | map = seek_rc_map(name); | |
59 | #ifdef MODULE | |
60 | if (!map) { | |
61 | int rc = request_module(name); | |
62 | if (rc < 0) { | |
63 | printk(KERN_ERR "Couldn't load IR keymap %s\n", name); | |
64 | return NULL; | |
65 | } | |
66 | msleep(20); /* Give some time for IR to register */ | |
67 | ||
68 | map = seek_rc_map(name); | |
69 | } | |
70 | #endif | |
71 | if (!map) { | |
72 | printk(KERN_ERR "IR keymap %s not found\n", name); | |
73 | return NULL; | |
74 | } | |
75 | ||
76 | printk(KERN_INFO "Registered IR keymap %s\n", map->map.name); | |
77 | ||
78 | return &map->map; | |
79 | } | |
d100e659 | 80 | EXPORT_SYMBOL_GPL(rc_map_get); |
631493ec | 81 | |
d100e659 | 82 | int rc_map_register(struct rc_map_list *map) |
631493ec MCC |
83 | { |
84 | spin_lock(&rc_map_lock); | |
85 | list_add_tail(&map->list, &rc_map_list); | |
86 | spin_unlock(&rc_map_lock); | |
87 | return 0; | |
88 | } | |
d100e659 | 89 | EXPORT_SYMBOL_GPL(rc_map_register); |
631493ec | 90 | |
d100e659 | 91 | void rc_map_unregister(struct rc_map_list *map) |
631493ec MCC |
92 | { |
93 | spin_lock(&rc_map_lock); | |
94 | list_del(&map->list); | |
95 | spin_unlock(&rc_map_lock); | |
96 | } | |
d100e659 | 97 | EXPORT_SYMBOL_GPL(rc_map_unregister); |
631493ec MCC |
98 | |
99 | ||
2f4f58d6 | 100 | static struct rc_map_table empty[] = { |
631493ec MCC |
101 | { 0x2a, KEY_COFFEE }, |
102 | }; | |
103 | ||
d100e659 | 104 | static struct rc_map_list empty_map = { |
631493ec MCC |
105 | .map = { |
106 | .scan = empty, | |
107 | .size = ARRAY_SIZE(empty), | |
52b66144 | 108 | .rc_type = RC_TYPE_UNKNOWN, /* Legacy IR type */ |
631493ec MCC |
109 | .name = RC_MAP_EMPTY, |
110 | } | |
111 | }; | |
112 | ||
9f470095 DT |
113 | /** |
114 | * ir_create_table() - initializes a scancode table | |
b088ba65 | 115 | * @rc_map: the rc_map to initialize |
9f470095 | 116 | * @name: name to assign to the table |
52b66144 | 117 | * @rc_type: ir type to assign to the new table |
9f470095 DT |
118 | * @size: initial size of the table |
119 | * @return: zero on success or a negative error code | |
120 | * | |
b088ba65 | 121 | * This routine will initialize the rc_map and will allocate |
d8b4b582 | 122 | * memory to hold at least the specified number of elements. |
9f470095 | 123 | */ |
b088ba65 | 124 | static int ir_create_table(struct rc_map *rc_map, |
52b66144 | 125 | const char *name, u64 rc_type, size_t size) |
9f470095 | 126 | { |
b088ba65 MCC |
127 | rc_map->name = name; |
128 | rc_map->rc_type = rc_type; | |
2f4f58d6 MCC |
129 | rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table)); |
130 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); | |
b088ba65 MCC |
131 | rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL); |
132 | if (!rc_map->scan) | |
9f470095 DT |
133 | return -ENOMEM; |
134 | ||
135 | IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", | |
b088ba65 | 136 | rc_map->size, rc_map->alloc); |
9f470095 DT |
137 | return 0; |
138 | } | |
139 | ||
140 | /** | |
141 | * ir_free_table() - frees memory allocated by a scancode table | |
b088ba65 | 142 | * @rc_map: the table whose mappings need to be freed |
9f470095 DT |
143 | * |
144 | * This routine will free memory alloctaed for key mappings used by given | |
145 | * scancode table. | |
146 | */ | |
b088ba65 | 147 | static void ir_free_table(struct rc_map *rc_map) |
9f470095 | 148 | { |
b088ba65 MCC |
149 | rc_map->size = 0; |
150 | kfree(rc_map->scan); | |
151 | rc_map->scan = NULL; | |
9f470095 DT |
152 | } |
153 | ||
7fee03e4 | 154 | /** |
b3074c0a | 155 | * ir_resize_table() - resizes a scancode table if necessary |
b088ba65 | 156 | * @rc_map: the rc_map to resize |
9f470095 | 157 | * @gfp_flags: gfp flags to use when allocating memory |
b3074c0a | 158 | * @return: zero on success or a negative error code |
7fee03e4 | 159 | * |
b088ba65 | 160 | * This routine will shrink the rc_map if it has lots of |
b3074c0a | 161 | * unused entries and grow it if it is full. |
7fee03e4 | 162 | */ |
b088ba65 | 163 | static int ir_resize_table(struct rc_map *rc_map, gfp_t gfp_flags) |
7fee03e4 | 164 | { |
b088ba65 | 165 | unsigned int oldalloc = rc_map->alloc; |
b3074c0a | 166 | unsigned int newalloc = oldalloc; |
2f4f58d6 MCC |
167 | struct rc_map_table *oldscan = rc_map->scan; |
168 | struct rc_map_table *newscan; | |
b3074c0a | 169 | |
b088ba65 | 170 | if (rc_map->size == rc_map->len) { |
b3074c0a | 171 | /* All entries in use -> grow keytable */ |
b088ba65 | 172 | if (rc_map->alloc >= IR_TAB_MAX_SIZE) |
b3074c0a | 173 | return -ENOMEM; |
7fee03e4 | 174 | |
b3074c0a DH |
175 | newalloc *= 2; |
176 | IR_dprintk(1, "Growing table to %u bytes\n", newalloc); | |
177 | } | |
7fee03e4 | 178 | |
b088ba65 | 179 | if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) { |
b3074c0a DH |
180 | /* Less than 1/3 of entries in use -> shrink keytable */ |
181 | newalloc /= 2; | |
182 | IR_dprintk(1, "Shrinking table to %u bytes\n", newalloc); | |
183 | } | |
7fee03e4 | 184 | |
b3074c0a DH |
185 | if (newalloc == oldalloc) |
186 | return 0; | |
7fee03e4 | 187 | |
9f470095 | 188 | newscan = kmalloc(newalloc, gfp_flags); |
b3074c0a DH |
189 | if (!newscan) { |
190 | IR_dprintk(1, "Failed to kmalloc %u bytes\n", newalloc); | |
191 | return -ENOMEM; | |
192 | } | |
7fee03e4 | 193 | |
2f4f58d6 | 194 | memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table)); |
b088ba65 MCC |
195 | rc_map->scan = newscan; |
196 | rc_map->alloc = newalloc; | |
2f4f58d6 | 197 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); |
b3074c0a DH |
198 | kfree(oldscan); |
199 | return 0; | |
7fee03e4 MCC |
200 | } |
201 | ||
f6fc5049 | 202 | /** |
9f470095 | 203 | * ir_update_mapping() - set a keycode in the scancode->keycode table |
d8b4b582 | 204 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 205 | * @rc_map: scancode table to be adjusted |
9f470095 DT |
206 | * @index: index of the mapping that needs to be updated |
207 | * @keycode: the desired keycode | |
208 | * @return: previous keycode assigned to the mapping | |
209 | * | |
d8b4b582 | 210 | * This routine is used to update scancode->keycode mapping at given |
9f470095 DT |
211 | * position. |
212 | */ | |
d8b4b582 | 213 | static unsigned int ir_update_mapping(struct rc_dev *dev, |
b088ba65 | 214 | struct rc_map *rc_map, |
9f470095 DT |
215 | unsigned int index, |
216 | unsigned int new_keycode) | |
217 | { | |
b088ba65 | 218 | int old_keycode = rc_map->scan[index].keycode; |
9f470095 DT |
219 | int i; |
220 | ||
221 | /* Did the user wish to remove the mapping? */ | |
222 | if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) { | |
223 | IR_dprintk(1, "#%d: Deleting scan 0x%04x\n", | |
b088ba65 MCC |
224 | index, rc_map->scan[index].scancode); |
225 | rc_map->len--; | |
226 | memmove(&rc_map->scan[index], &rc_map->scan[index+ 1], | |
2f4f58d6 | 227 | (rc_map->len - index) * sizeof(struct rc_map_table)); |
9f470095 DT |
228 | } else { |
229 | IR_dprintk(1, "#%d: %s scan 0x%04x with key 0x%04x\n", | |
230 | index, | |
231 | old_keycode == KEY_RESERVED ? "New" : "Replacing", | |
b088ba65 MCC |
232 | rc_map->scan[index].scancode, new_keycode); |
233 | rc_map->scan[index].keycode = new_keycode; | |
d8b4b582 | 234 | __set_bit(new_keycode, dev->input_dev->keybit); |
9f470095 DT |
235 | } |
236 | ||
237 | if (old_keycode != KEY_RESERVED) { | |
238 | /* A previous mapping was updated... */ | |
d8b4b582 | 239 | __clear_bit(old_keycode, dev->input_dev->keybit); |
9f470095 | 240 | /* ... but another scancode might use the same keycode */ |
b088ba65 MCC |
241 | for (i = 0; i < rc_map->len; i++) { |
242 | if (rc_map->scan[i].keycode == old_keycode) { | |
d8b4b582 | 243 | __set_bit(old_keycode, dev->input_dev->keybit); |
9f470095 DT |
244 | break; |
245 | } | |
246 | } | |
247 | ||
248 | /* Possibly shrink the keytable, failure is not a problem */ | |
b088ba65 | 249 | ir_resize_table(rc_map, GFP_ATOMIC); |
9f470095 DT |
250 | } |
251 | ||
252 | return old_keycode; | |
253 | } | |
254 | ||
255 | /** | |
4c7b355d | 256 | * ir_establish_scancode() - set a keycode in the scancode->keycode table |
d8b4b582 | 257 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 258 | * @rc_map: scancode table to be searched |
9f470095 DT |
259 | * @scancode: the desired scancode |
260 | * @resize: controls whether we allowed to resize the table to | |
25985edc | 261 | * accommodate not yet present scancodes |
9f470095 DT |
262 | * @return: index of the mapping containing scancode in question |
263 | * or -1U in case of failure. | |
f6fc5049 | 264 | * |
b088ba65 | 265 | * This routine is used to locate given scancode in rc_map. |
9f470095 DT |
266 | * If scancode is not yet present the routine will allocate a new slot |
267 | * for it. | |
f6fc5049 | 268 | */ |
d8b4b582 | 269 | static unsigned int ir_establish_scancode(struct rc_dev *dev, |
b088ba65 | 270 | struct rc_map *rc_map, |
9f470095 DT |
271 | unsigned int scancode, |
272 | bool resize) | |
f6fc5049 | 273 | { |
b3074c0a | 274 | unsigned int i; |
9dfe4e83 MCC |
275 | |
276 | /* | |
277 | * Unfortunately, some hardware-based IR decoders don't provide | |
278 | * all bits for the complete IR code. In general, they provide only | |
279 | * the command part of the IR code. Yet, as it is possible to replace | |
280 | * the provided IR with another one, it is needed to allow loading | |
d8b4b582 DH |
281 | * IR tables from other remotes. So, we support specifying a mask to |
282 | * indicate the valid bits of the scancodes. | |
9dfe4e83 | 283 | */ |
d8b4b582 DH |
284 | if (dev->scanmask) |
285 | scancode &= dev->scanmask; | |
b3074c0a DH |
286 | |
287 | /* First check if we already have a mapping for this ir command */ | |
b088ba65 MCC |
288 | for (i = 0; i < rc_map->len; i++) { |
289 | if (rc_map->scan[i].scancode == scancode) | |
9f470095 DT |
290 | return i; |
291 | ||
b3074c0a | 292 | /* Keytable is sorted from lowest to highest scancode */ |
b088ba65 | 293 | if (rc_map->scan[i].scancode >= scancode) |
b3074c0a | 294 | break; |
b3074c0a | 295 | } |
f6fc5049 | 296 | |
9f470095 | 297 | /* No previous mapping found, we might need to grow the table */ |
b088ba65 MCC |
298 | if (rc_map->size == rc_map->len) { |
299 | if (!resize || ir_resize_table(rc_map, GFP_ATOMIC)) | |
9f470095 DT |
300 | return -1U; |
301 | } | |
35438946 | 302 | |
9f470095 | 303 | /* i is the proper index to insert our new keycode */ |
b088ba65 MCC |
304 | if (i < rc_map->len) |
305 | memmove(&rc_map->scan[i + 1], &rc_map->scan[i], | |
2f4f58d6 | 306 | (rc_map->len - i) * sizeof(struct rc_map_table)); |
b088ba65 MCC |
307 | rc_map->scan[i].scancode = scancode; |
308 | rc_map->scan[i].keycode = KEY_RESERVED; | |
309 | rc_map->len++; | |
f6fc5049 | 310 | |
9f470095 | 311 | return i; |
f6fc5049 MCC |
312 | } |
313 | ||
ef53a115 | 314 | /** |
b3074c0a | 315 | * ir_setkeycode() - set a keycode in the scancode->keycode table |
d8b4b582 | 316 | * @idev: the struct input_dev device descriptor |
ef53a115 | 317 | * @scancode: the desired scancode |
b3074c0a DH |
318 | * @keycode: result |
319 | * @return: -EINVAL if the keycode could not be inserted, otherwise zero. | |
ef53a115 | 320 | * |
b3074c0a | 321 | * This routine is used to handle evdev EVIOCSKEY ioctl. |
ef53a115 | 322 | */ |
d8b4b582 | 323 | static int ir_setkeycode(struct input_dev *idev, |
9f470095 DT |
324 | const struct input_keymap_entry *ke, |
325 | unsigned int *old_keycode) | |
ef53a115 | 326 | { |
d8b4b582 | 327 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 328 | struct rc_map *rc_map = &rdev->rc_map; |
9f470095 DT |
329 | unsigned int index; |
330 | unsigned int scancode; | |
dea8a39f | 331 | int retval = 0; |
9f470095 | 332 | unsigned long flags; |
ef53a115 | 333 | |
b088ba65 | 334 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
335 | |
336 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
337 | index = ke->index; | |
b088ba65 | 338 | if (index >= rc_map->len) { |
9f470095 DT |
339 | retval = -EINVAL; |
340 | goto out; | |
341 | } | |
342 | } else { | |
343 | retval = input_scancode_to_scalar(ke, &scancode); | |
344 | if (retval) | |
345 | goto out; | |
346 | ||
b088ba65 MCC |
347 | index = ir_establish_scancode(rdev, rc_map, scancode, true); |
348 | if (index >= rc_map->len) { | |
9f470095 DT |
349 | retval = -ENOMEM; |
350 | goto out; | |
351 | } | |
352 | } | |
353 | ||
b088ba65 | 354 | *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode); |
9f470095 DT |
355 | |
356 | out: | |
b088ba65 | 357 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 358 | return retval; |
e97f4677 MCC |
359 | } |
360 | ||
361 | /** | |
b3074c0a | 362 | * ir_setkeytable() - sets several entries in the scancode->keycode table |
d8b4b582 | 363 | * @dev: the struct rc_dev device descriptor |
b088ba65 MCC |
364 | * @to: the struct rc_map to copy entries to |
365 | * @from: the struct rc_map to copy entries from | |
9f470095 | 366 | * @return: -ENOMEM if all keycodes could not be inserted, otherwise zero. |
e97f4677 | 367 | * |
b3074c0a | 368 | * This routine is used to handle table initialization. |
e97f4677 | 369 | */ |
d8b4b582 | 370 | static int ir_setkeytable(struct rc_dev *dev, |
b088ba65 | 371 | const struct rc_map *from) |
e97f4677 | 372 | { |
b088ba65 | 373 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
374 | unsigned int i, index; |
375 | int rc; | |
376 | ||
b088ba65 | 377 | rc = ir_create_table(rc_map, from->name, |
52b66144 | 378 | from->rc_type, from->size); |
9f470095 DT |
379 | if (rc) |
380 | return rc; | |
381 | ||
382 | IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", | |
b088ba65 | 383 | rc_map->size, rc_map->alloc); |
e97f4677 | 384 | |
b3074c0a | 385 | for (i = 0; i < from->size; i++) { |
b088ba65 | 386 | index = ir_establish_scancode(dev, rc_map, |
9f470095 | 387 | from->scan[i].scancode, false); |
b088ba65 | 388 | if (index >= rc_map->len) { |
9f470095 | 389 | rc = -ENOMEM; |
b3074c0a | 390 | break; |
9f470095 DT |
391 | } |
392 | ||
b088ba65 | 393 | ir_update_mapping(dev, rc_map, index, |
9f470095 | 394 | from->scan[i].keycode); |
e97f4677 | 395 | } |
9f470095 DT |
396 | |
397 | if (rc) | |
b088ba65 | 398 | ir_free_table(rc_map); |
9f470095 | 399 | |
b3074c0a | 400 | return rc; |
ef53a115 MCC |
401 | } |
402 | ||
9f470095 DT |
403 | /** |
404 | * ir_lookup_by_scancode() - locate mapping by scancode | |
b088ba65 | 405 | * @rc_map: the struct rc_map to search |
9f470095 DT |
406 | * @scancode: scancode to look for in the table |
407 | * @return: index in the table, -1U if not found | |
408 | * | |
409 | * This routine performs binary search in RC keykeymap table for | |
410 | * given scancode. | |
411 | */ | |
b088ba65 | 412 | static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map, |
9f470095 DT |
413 | unsigned int scancode) |
414 | { | |
0d07025e | 415 | int start = 0; |
b088ba65 | 416 | int end = rc_map->len - 1; |
0d07025e | 417 | int mid; |
9f470095 DT |
418 | |
419 | while (start <= end) { | |
420 | mid = (start + end) / 2; | |
b088ba65 | 421 | if (rc_map->scan[mid].scancode < scancode) |
9f470095 | 422 | start = mid + 1; |
b088ba65 | 423 | else if (rc_map->scan[mid].scancode > scancode) |
9f470095 DT |
424 | end = mid - 1; |
425 | else | |
426 | return mid; | |
427 | } | |
428 | ||
429 | return -1U; | |
430 | } | |
431 | ||
ef53a115 | 432 | /** |
b3074c0a | 433 | * ir_getkeycode() - get a keycode from the scancode->keycode table |
d8b4b582 | 434 | * @idev: the struct input_dev device descriptor |
ef53a115 | 435 | * @scancode: the desired scancode |
b3074c0a DH |
436 | * @keycode: used to return the keycode, if found, or KEY_RESERVED |
437 | * @return: always returns zero. | |
ef53a115 | 438 | * |
b3074c0a | 439 | * This routine is used to handle evdev EVIOCGKEY ioctl. |
ef53a115 | 440 | */ |
d8b4b582 | 441 | static int ir_getkeycode(struct input_dev *idev, |
9f470095 | 442 | struct input_keymap_entry *ke) |
ef53a115 | 443 | { |
d8b4b582 | 444 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 445 | struct rc_map *rc_map = &rdev->rc_map; |
2f4f58d6 | 446 | struct rc_map_table *entry; |
9f470095 DT |
447 | unsigned long flags; |
448 | unsigned int index; | |
449 | unsigned int scancode; | |
450 | int retval; | |
ef53a115 | 451 | |
b088ba65 | 452 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
453 | |
454 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
455 | index = ke->index; | |
456 | } else { | |
457 | retval = input_scancode_to_scalar(ke, &scancode); | |
458 | if (retval) | |
459 | goto out; | |
460 | ||
b088ba65 | 461 | index = ir_lookup_by_scancode(rc_map, scancode); |
9f470095 DT |
462 | } |
463 | ||
54e74b87 DT |
464 | if (index < rc_map->len) { |
465 | entry = &rc_map->scan[index]; | |
466 | ||
467 | ke->index = index; | |
468 | ke->keycode = entry->keycode; | |
469 | ke->len = sizeof(entry->scancode); | |
470 | memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode)); | |
471 | ||
472 | } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) { | |
473 | /* | |
474 | * We do not really know the valid range of scancodes | |
475 | * so let's respond with KEY_RESERVED to anything we | |
476 | * do not have mapping for [yet]. | |
477 | */ | |
478 | ke->index = index; | |
479 | ke->keycode = KEY_RESERVED; | |
480 | } else { | |
9f470095 DT |
481 | retval = -EINVAL; |
482 | goto out; | |
e97f4677 MCC |
483 | } |
484 | ||
47c5ba53 DT |
485 | retval = 0; |
486 | ||
9f470095 | 487 | out: |
b088ba65 | 488 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 489 | return retval; |
ef53a115 MCC |
490 | } |
491 | ||
492 | /** | |
ca86674b | 493 | * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode |
d8b4b582 DH |
494 | * @dev: the struct rc_dev descriptor of the device |
495 | * @scancode: the scancode to look for | |
496 | * @return: the corresponding keycode, or KEY_RESERVED | |
ef53a115 | 497 | * |
d8b4b582 DH |
498 | * This routine is used by drivers which need to convert a scancode to a |
499 | * keycode. Normally it should not be used since drivers should have no | |
500 | * interest in keycodes. | |
ef53a115 | 501 | */ |
ca86674b | 502 | u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode) |
ef53a115 | 503 | { |
b088ba65 | 504 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
505 | unsigned int keycode; |
506 | unsigned int index; | |
507 | unsigned long flags; | |
508 | ||
b088ba65 | 509 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 | 510 | |
b088ba65 MCC |
511 | index = ir_lookup_by_scancode(rc_map, scancode); |
512 | keycode = index < rc_map->len ? | |
513 | rc_map->scan[index].keycode : KEY_RESERVED; | |
9f470095 | 514 | |
b088ba65 | 515 | spin_unlock_irqrestore(&rc_map->lock, flags); |
ef53a115 | 516 | |
35438946 MCC |
517 | if (keycode != KEY_RESERVED) |
518 | IR_dprintk(1, "%s: scancode 0x%04x keycode 0x%02x\n", | |
d8b4b582 | 519 | dev->input_name, scancode, keycode); |
9f470095 | 520 | |
b3074c0a | 521 | return keycode; |
ef53a115 | 522 | } |
ca86674b | 523 | EXPORT_SYMBOL_GPL(rc_g_keycode_from_table); |
ef53a115 | 524 | |
6660de56 | 525 | /** |
62c65031 | 526 | * ir_do_keyup() - internal function to signal the release of a keypress |
d8b4b582 | 527 | * @dev: the struct rc_dev descriptor of the device |
98c32bcd | 528 | * @sync: whether or not to call input_sync |
6660de56 | 529 | * |
62c65031 DH |
530 | * This function is used internally to release a keypress, it must be |
531 | * called with keylock held. | |
a374fef4 | 532 | */ |
98c32bcd | 533 | static void ir_do_keyup(struct rc_dev *dev, bool sync) |
a374fef4 | 534 | { |
d8b4b582 | 535 | if (!dev->keypressed) |
a374fef4 DH |
536 | return; |
537 | ||
d8b4b582 DH |
538 | IR_dprintk(1, "keyup key 0x%04x\n", dev->last_keycode); |
539 | input_report_key(dev->input_dev, dev->last_keycode, 0); | |
153a60bb | 540 | led_trigger_event(led_feedback, LED_OFF); |
98c32bcd JW |
541 | if (sync) |
542 | input_sync(dev->input_dev); | |
d8b4b582 | 543 | dev->keypressed = false; |
a374fef4 | 544 | } |
62c65031 DH |
545 | |
546 | /** | |
ca86674b | 547 | * rc_keyup() - signals the release of a keypress |
d8b4b582 | 548 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
549 | * |
550 | * This routine is used to signal that a key has been released on the | |
551 | * remote control. | |
552 | */ | |
ca86674b | 553 | void rc_keyup(struct rc_dev *dev) |
62c65031 DH |
554 | { |
555 | unsigned long flags; | |
62c65031 | 556 | |
d8b4b582 | 557 | spin_lock_irqsave(&dev->keylock, flags); |
98c32bcd | 558 | ir_do_keyup(dev, true); |
d8b4b582 | 559 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 560 | } |
ca86674b | 561 | EXPORT_SYMBOL_GPL(rc_keyup); |
a374fef4 DH |
562 | |
563 | /** | |
564 | * ir_timer_keyup() - generates a keyup event after a timeout | |
d8b4b582 | 565 | * @cookie: a pointer to the struct rc_dev for the device |
a374fef4 DH |
566 | * |
567 | * This routine will generate a keyup event some time after a keydown event | |
568 | * is generated when no further activity has been detected. | |
6660de56 | 569 | */ |
a374fef4 | 570 | static void ir_timer_keyup(unsigned long cookie) |
6660de56 | 571 | { |
d8b4b582 | 572 | struct rc_dev *dev = (struct rc_dev *)cookie; |
a374fef4 DH |
573 | unsigned long flags; |
574 | ||
575 | /* | |
576 | * ir->keyup_jiffies is used to prevent a race condition if a | |
577 | * hardware interrupt occurs at this point and the keyup timer | |
578 | * event is moved further into the future as a result. | |
579 | * | |
580 | * The timer will then be reactivated and this function called | |
581 | * again in the future. We need to exit gracefully in that case | |
582 | * to allow the input subsystem to do its auto-repeat magic or | |
583 | * a keyup event might follow immediately after the keydown. | |
584 | */ | |
d8b4b582 DH |
585 | spin_lock_irqsave(&dev->keylock, flags); |
586 | if (time_is_before_eq_jiffies(dev->keyup_jiffies)) | |
98c32bcd | 587 | ir_do_keyup(dev, true); |
d8b4b582 | 588 | spin_unlock_irqrestore(&dev->keylock, flags); |
a374fef4 DH |
589 | } |
590 | ||
591 | /** | |
ca86674b | 592 | * rc_repeat() - signals that a key is still pressed |
d8b4b582 | 593 | * @dev: the struct rc_dev descriptor of the device |
a374fef4 DH |
594 | * |
595 | * This routine is used by IR decoders when a repeat message which does | |
596 | * not include the necessary bits to reproduce the scancode has been | |
597 | * received. | |
598 | */ | |
ca86674b | 599 | void rc_repeat(struct rc_dev *dev) |
a374fef4 DH |
600 | { |
601 | unsigned long flags; | |
6660de56 | 602 | |
d8b4b582 | 603 | spin_lock_irqsave(&dev->keylock, flags); |
a374fef4 | 604 | |
d8b4b582 | 605 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode); |
98c32bcd | 606 | input_sync(dev->input_dev); |
ed4d3876 | 607 | |
d8b4b582 | 608 | if (!dev->keypressed) |
a374fef4 | 609 | goto out; |
6660de56 | 610 | |
d8b4b582 DH |
611 | dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); |
612 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
a374fef4 DH |
613 | |
614 | out: | |
d8b4b582 | 615 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 616 | } |
ca86674b | 617 | EXPORT_SYMBOL_GPL(rc_repeat); |
6660de56 MCC |
618 | |
619 | /** | |
62c65031 | 620 | * ir_do_keydown() - internal function to process a keypress |
d8b4b582 | 621 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
622 | * @scancode: the scancode of the keypress |
623 | * @keycode: the keycode of the keypress | |
624 | * @toggle: the toggle value of the keypress | |
6660de56 | 625 | * |
62c65031 DH |
626 | * This function is used internally to register a keypress, it must be |
627 | * called with keylock held. | |
6660de56 | 628 | */ |
d8b4b582 | 629 | static void ir_do_keydown(struct rc_dev *dev, int scancode, |
62c65031 | 630 | u32 keycode, u8 toggle) |
6660de56 | 631 | { |
98c32bcd JW |
632 | bool new_event = !dev->keypressed || |
633 | dev->last_scancode != scancode || | |
634 | dev->last_toggle != toggle; | |
6660de56 | 635 | |
98c32bcd JW |
636 | if (new_event && dev->keypressed) |
637 | ir_do_keyup(dev, false); | |
6660de56 | 638 | |
98c32bcd | 639 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode); |
a374fef4 | 640 | |
98c32bcd JW |
641 | if (new_event && keycode != KEY_RESERVED) { |
642 | /* Register a keypress */ | |
643 | dev->keypressed = true; | |
644 | dev->last_scancode = scancode; | |
645 | dev->last_toggle = toggle; | |
646 | dev->last_keycode = keycode; | |
647 | ||
648 | IR_dprintk(1, "%s: key down event, " | |
649 | "key 0x%04x, scancode 0x%04x\n", | |
650 | dev->input_name, keycode, scancode); | |
651 | input_report_key(dev->input_dev, keycode, 1); | |
652 | } | |
ed4d3876 | 653 | |
153a60bb | 654 | led_trigger_event(led_feedback, LED_FULL); |
d8b4b582 | 655 | input_sync(dev->input_dev); |
62c65031 | 656 | } |
6660de56 | 657 | |
62c65031 | 658 | /** |
ca86674b | 659 | * rc_keydown() - generates input event for a key press |
d8b4b582 | 660 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
661 | * @scancode: the scancode that we're seeking |
662 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't | |
663 | * support toggle values, this should be set to zero) | |
664 | * | |
d8b4b582 DH |
665 | * This routine is used to signal that a key has been pressed on the |
666 | * remote control. | |
62c65031 | 667 | */ |
ca86674b | 668 | void rc_keydown(struct rc_dev *dev, int scancode, u8 toggle) |
62c65031 DH |
669 | { |
670 | unsigned long flags; | |
ca86674b | 671 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 672 | |
d8b4b582 | 673 | spin_lock_irqsave(&dev->keylock, flags); |
62c65031 DH |
674 | ir_do_keydown(dev, scancode, keycode, toggle); |
675 | ||
d8b4b582 DH |
676 | if (dev->keypressed) { |
677 | dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); | |
678 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
62c65031 | 679 | } |
d8b4b582 | 680 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 681 | } |
ca86674b | 682 | EXPORT_SYMBOL_GPL(rc_keydown); |
6660de56 | 683 | |
62c65031 | 684 | /** |
ca86674b | 685 | * rc_keydown_notimeout() - generates input event for a key press without |
62c65031 | 686 | * an automatic keyup event at a later time |
d8b4b582 | 687 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
688 | * @scancode: the scancode that we're seeking |
689 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't | |
690 | * support toggle values, this should be set to zero) | |
691 | * | |
d8b4b582 | 692 | * This routine is used to signal that a key has been pressed on the |
ca86674b | 693 | * remote control. The driver must manually call rc_keyup() at a later stage. |
62c65031 | 694 | */ |
ca86674b | 695 | void rc_keydown_notimeout(struct rc_dev *dev, int scancode, u8 toggle) |
62c65031 DH |
696 | { |
697 | unsigned long flags; | |
ca86674b | 698 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 699 | |
d8b4b582 | 700 | spin_lock_irqsave(&dev->keylock, flags); |
62c65031 | 701 | ir_do_keydown(dev, scancode, keycode, toggle); |
d8b4b582 | 702 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 703 | } |
ca86674b | 704 | EXPORT_SYMBOL_GPL(rc_keydown_notimeout); |
62c65031 | 705 | |
8b2ff320 SK |
706 | int rc_open(struct rc_dev *rdev) |
707 | { | |
708 | int rval = 0; | |
709 | ||
710 | if (!rdev) | |
711 | return -EINVAL; | |
712 | ||
713 | mutex_lock(&rdev->lock); | |
f02dcdd1 | 714 | if (!rdev->users++ && rdev->open != NULL) |
8b2ff320 SK |
715 | rval = rdev->open(rdev); |
716 | ||
717 | if (rval) | |
718 | rdev->users--; | |
719 | ||
720 | mutex_unlock(&rdev->lock); | |
721 | ||
722 | return rval; | |
723 | } | |
724 | EXPORT_SYMBOL_GPL(rc_open); | |
725 | ||
d8b4b582 | 726 | static int ir_open(struct input_dev *idev) |
ef53a115 | 727 | { |
d8b4b582 | 728 | struct rc_dev *rdev = input_get_drvdata(idev); |
75543cce | 729 | |
8b2ff320 SK |
730 | return rc_open(rdev); |
731 | } | |
732 | ||
733 | void rc_close(struct rc_dev *rdev) | |
734 | { | |
735 | if (rdev) { | |
736 | mutex_lock(&rdev->lock); | |
737 | ||
f02dcdd1 | 738 | if (!--rdev->users && rdev->close != NULL) |
8b2ff320 SK |
739 | rdev->close(rdev); |
740 | ||
741 | mutex_unlock(&rdev->lock); | |
742 | } | |
ef53a115 | 743 | } |
8b2ff320 | 744 | EXPORT_SYMBOL_GPL(rc_close); |
d4b778d3 | 745 | |
d8b4b582 | 746 | static void ir_close(struct input_dev *idev) |
f6fc5049 | 747 | { |
d8b4b582 | 748 | struct rc_dev *rdev = input_get_drvdata(idev); |
8b2ff320 | 749 | rc_close(rdev); |
f6fc5049 | 750 | } |
f6fc5049 | 751 | |
bc2a6c57 | 752 | /* class for /sys/class/rc */ |
40fc5325 | 753 | static char *rc_devnode(struct device *dev, umode_t *mode) |
bc2a6c57 MCC |
754 | { |
755 | return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev)); | |
756 | } | |
757 | ||
40fc5325 | 758 | static struct class rc_class = { |
bc2a6c57 | 759 | .name = "rc", |
40fc5325 | 760 | .devnode = rc_devnode, |
bc2a6c57 MCC |
761 | }; |
762 | ||
c003ab1b DH |
763 | /* |
764 | * These are the protocol textual descriptions that are | |
765 | * used by the sysfs protocols file. Note that the order | |
766 | * of the entries is relevant. | |
767 | */ | |
bc2a6c57 MCC |
768 | static struct { |
769 | u64 type; | |
770 | char *name; | |
771 | } proto_names[] = { | |
c003ab1b DH |
772 | { RC_BIT_NONE, "none" }, |
773 | { RC_BIT_OTHER, "other" }, | |
774 | { RC_BIT_UNKNOWN, "unknown" }, | |
775 | { RC_BIT_RC5 | | |
776 | RC_BIT_RC5X, "rc-5" }, | |
777 | { RC_BIT_NEC, "nec" }, | |
778 | { RC_BIT_RC6_0 | | |
779 | RC_BIT_RC6_6A_20 | | |
780 | RC_BIT_RC6_6A_24 | | |
781 | RC_BIT_RC6_6A_32 | | |
782 | RC_BIT_RC6_MCE, "rc-6" }, | |
783 | { RC_BIT_JVC, "jvc" }, | |
784 | { RC_BIT_SONY12 | | |
785 | RC_BIT_SONY15 | | |
786 | RC_BIT_SONY20, "sony" }, | |
787 | { RC_BIT_RC5_SZ, "rc-5-sz" }, | |
788 | { RC_BIT_SANYO, "sanyo" }, | |
789 | { RC_BIT_MCE_KBD, "mce_kbd" }, | |
790 | { RC_BIT_LIRC, "lirc" }, | |
bc2a6c57 MCC |
791 | }; |
792 | ||
bc2a6c57 MCC |
793 | /** |
794 | * show_protocols() - shows the current IR protocol(s) | |
d8b4b582 | 795 | * @device: the device descriptor |
bc2a6c57 MCC |
796 | * @mattr: the device attribute struct (unused) |
797 | * @buf: a pointer to the output buffer | |
798 | * | |
799 | * This routine is a callback routine for input read the IR protocol type(s). | |
800 | * it is trigged by reading /sys/class/rc/rc?/protocols. | |
801 | * It returns the protocol names of supported protocols. | |
802 | * Enabled protocols are printed in brackets. | |
08aeb7c9 JW |
803 | * |
804 | * dev->lock is taken to guard against races between device | |
805 | * registration, store_protocols and show_protocols. | |
bc2a6c57 | 806 | */ |
d8b4b582 | 807 | static ssize_t show_protocols(struct device *device, |
bc2a6c57 MCC |
808 | struct device_attribute *mattr, char *buf) |
809 | { | |
d8b4b582 | 810 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 MCC |
811 | u64 allowed, enabled; |
812 | char *tmp = buf; | |
813 | int i; | |
814 | ||
815 | /* Device is being removed */ | |
d8b4b582 | 816 | if (!dev) |
bc2a6c57 MCC |
817 | return -EINVAL; |
818 | ||
08aeb7c9 JW |
819 | mutex_lock(&dev->lock); |
820 | ||
9719afae DH |
821 | enabled = dev->enabled_protocols; |
822 | if (dev->driver_type == RC_DRIVER_SCANCODE) | |
d8b4b582 | 823 | allowed = dev->allowed_protos; |
9719afae | 824 | else if (dev->raw) |
bc2a6c57 | 825 | allowed = ir_raw_get_allowed_protocols(); |
9719afae | 826 | else { |
30ebc5e4 | 827 | mutex_unlock(&dev->lock); |
720bb643 | 828 | return -ENODEV; |
30ebc5e4 | 829 | } |
bc2a6c57 MCC |
830 | |
831 | IR_dprintk(1, "allowed - 0x%llx, enabled - 0x%llx\n", | |
832 | (long long)allowed, | |
833 | (long long)enabled); | |
834 | ||
835 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
836 | if (allowed & enabled & proto_names[i].type) | |
837 | tmp += sprintf(tmp, "[%s] ", proto_names[i].name); | |
838 | else if (allowed & proto_names[i].type) | |
839 | tmp += sprintf(tmp, "%s ", proto_names[i].name); | |
c003ab1b DH |
840 | |
841 | if (allowed & proto_names[i].type) | |
842 | allowed &= ~proto_names[i].type; | |
bc2a6c57 MCC |
843 | } |
844 | ||
845 | if (tmp != buf) | |
846 | tmp--; | |
847 | *tmp = '\n'; | |
08aeb7c9 JW |
848 | |
849 | mutex_unlock(&dev->lock); | |
850 | ||
bc2a6c57 MCC |
851 | return tmp + 1 - buf; |
852 | } | |
853 | ||
854 | /** | |
855 | * store_protocols() - changes the current IR protocol(s) | |
d8b4b582 | 856 | * @device: the device descriptor |
bc2a6c57 MCC |
857 | * @mattr: the device attribute struct (unused) |
858 | * @buf: a pointer to the input buffer | |
859 | * @len: length of the input buffer | |
860 | * | |
d8b4b582 | 861 | * This routine is for changing the IR protocol type. |
bc2a6c57 MCC |
862 | * It is trigged by writing to /sys/class/rc/rc?/protocols. |
863 | * Writing "+proto" will add a protocol to the list of enabled protocols. | |
864 | * Writing "-proto" will remove a protocol from the list of enabled protocols. | |
865 | * Writing "proto" will enable only "proto". | |
866 | * Writing "none" will disable all protocols. | |
867 | * Returns -EINVAL if an invalid protocol combination or unknown protocol name | |
868 | * is used, otherwise @len. | |
08aeb7c9 JW |
869 | * |
870 | * dev->lock is taken to guard against races between device | |
871 | * registration, store_protocols and show_protocols. | |
bc2a6c57 | 872 | */ |
d8b4b582 | 873 | static ssize_t store_protocols(struct device *device, |
bc2a6c57 MCC |
874 | struct device_attribute *mattr, |
875 | const char *data, | |
876 | size_t len) | |
877 | { | |
d8b4b582 | 878 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 MCC |
879 | bool enable, disable; |
880 | const char *tmp; | |
881 | u64 type; | |
882 | u64 mask; | |
883 | int rc, i, count = 0; | |
08aeb7c9 | 884 | ssize_t ret; |
bc2a6c57 MCC |
885 | |
886 | /* Device is being removed */ | |
d8b4b582 | 887 | if (!dev) |
bc2a6c57 MCC |
888 | return -EINVAL; |
889 | ||
08aeb7c9 JW |
890 | mutex_lock(&dev->lock); |
891 | ||
9719afae | 892 | if (dev->driver_type != RC_DRIVER_SCANCODE && !dev->raw) { |
bc2a6c57 | 893 | IR_dprintk(1, "Protocol switching not supported\n"); |
08aeb7c9 JW |
894 | ret = -EINVAL; |
895 | goto out; | |
bc2a6c57 | 896 | } |
9719afae | 897 | type = dev->enabled_protocols; |
bc2a6c57 MCC |
898 | |
899 | while ((tmp = strsep((char **) &data, " \n")) != NULL) { | |
900 | if (!*tmp) | |
901 | break; | |
902 | ||
903 | if (*tmp == '+') { | |
904 | enable = true; | |
905 | disable = false; | |
906 | tmp++; | |
907 | } else if (*tmp == '-') { | |
908 | enable = false; | |
909 | disable = true; | |
910 | tmp++; | |
911 | } else { | |
912 | enable = false; | |
913 | disable = false; | |
914 | } | |
915 | ||
c003ab1b DH |
916 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { |
917 | if (!strcasecmp(tmp, proto_names[i].name)) { | |
918 | mask = proto_names[i].type; | |
919 | break; | |
bc2a6c57 | 920 | } |
bc2a6c57 MCC |
921 | } |
922 | ||
c003ab1b DH |
923 | if (i == ARRAY_SIZE(proto_names)) { |
924 | IR_dprintk(1, "Unknown protocol: '%s'\n", tmp); | |
afe5624b DC |
925 | ret = -EINVAL; |
926 | goto out; | |
c003ab1b DH |
927 | } |
928 | ||
929 | count++; | |
930 | ||
bc2a6c57 MCC |
931 | if (enable) |
932 | type |= mask; | |
933 | else if (disable) | |
934 | type &= ~mask; | |
935 | else | |
936 | type = mask; | |
937 | } | |
938 | ||
939 | if (!count) { | |
940 | IR_dprintk(1, "Protocol not specified\n"); | |
08aeb7c9 JW |
941 | ret = -EINVAL; |
942 | goto out; | |
bc2a6c57 MCC |
943 | } |
944 | ||
d8b4b582 | 945 | if (dev->change_protocol) { |
c003ab1b | 946 | rc = dev->change_protocol(dev, &type); |
bc2a6c57 MCC |
947 | if (rc < 0) { |
948 | IR_dprintk(1, "Error setting protocols to 0x%llx\n", | |
949 | (long long)type); | |
08aeb7c9 JW |
950 | ret = -EINVAL; |
951 | goto out; | |
bc2a6c57 MCC |
952 | } |
953 | } | |
954 | ||
9719afae | 955 | dev->enabled_protocols = type; |
bc2a6c57 MCC |
956 | IR_dprintk(1, "Current protocol(s): 0x%llx\n", |
957 | (long long)type); | |
958 | ||
08aeb7c9 JW |
959 | ret = len; |
960 | ||
961 | out: | |
962 | mutex_unlock(&dev->lock); | |
963 | return ret; | |
bc2a6c57 MCC |
964 | } |
965 | ||
d8b4b582 DH |
966 | static void rc_dev_release(struct device *device) |
967 | { | |
d8b4b582 DH |
968 | } |
969 | ||
bc2a6c57 MCC |
970 | #define ADD_HOTPLUG_VAR(fmt, val...) \ |
971 | do { \ | |
972 | int err = add_uevent_var(env, fmt, val); \ | |
973 | if (err) \ | |
974 | return err; \ | |
975 | } while (0) | |
976 | ||
977 | static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) | |
978 | { | |
d8b4b582 | 979 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 | 980 | |
b05681b9 MCC |
981 | if (!dev || !dev->input_dev) |
982 | return -ENODEV; | |
983 | ||
b088ba65 MCC |
984 | if (dev->rc_map.name) |
985 | ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name); | |
d8b4b582 DH |
986 | if (dev->driver_name) |
987 | ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name); | |
bc2a6c57 MCC |
988 | |
989 | return 0; | |
990 | } | |
991 | ||
992 | /* | |
993 | * Static device attribute struct with the sysfs attributes for IR's | |
994 | */ | |
995 | static DEVICE_ATTR(protocols, S_IRUGO | S_IWUSR, | |
996 | show_protocols, store_protocols); | |
997 | ||
998 | static struct attribute *rc_dev_attrs[] = { | |
999 | &dev_attr_protocols.attr, | |
1000 | NULL, | |
1001 | }; | |
1002 | ||
1003 | static struct attribute_group rc_dev_attr_grp = { | |
1004 | .attrs = rc_dev_attrs, | |
1005 | }; | |
1006 | ||
1007 | static const struct attribute_group *rc_dev_attr_groups[] = { | |
1008 | &rc_dev_attr_grp, | |
1009 | NULL | |
1010 | }; | |
1011 | ||
1012 | static struct device_type rc_dev_type = { | |
1013 | .groups = rc_dev_attr_groups, | |
d8b4b582 | 1014 | .release = rc_dev_release, |
bc2a6c57 MCC |
1015 | .uevent = rc_dev_uevent, |
1016 | }; | |
1017 | ||
d8b4b582 | 1018 | struct rc_dev *rc_allocate_device(void) |
bc2a6c57 | 1019 | { |
d8b4b582 | 1020 | struct rc_dev *dev; |
bc2a6c57 | 1021 | |
d8b4b582 DH |
1022 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1023 | if (!dev) | |
1024 | return NULL; | |
1025 | ||
1026 | dev->input_dev = input_allocate_device(); | |
1027 | if (!dev->input_dev) { | |
1028 | kfree(dev); | |
1029 | return NULL; | |
1030 | } | |
1031 | ||
aebd636b DT |
1032 | dev->input_dev->getkeycode = ir_getkeycode; |
1033 | dev->input_dev->setkeycode = ir_setkeycode; | |
d8b4b582 DH |
1034 | input_set_drvdata(dev->input_dev, dev); |
1035 | ||
b088ba65 | 1036 | spin_lock_init(&dev->rc_map.lock); |
d8b4b582 | 1037 | spin_lock_init(&dev->keylock); |
08aeb7c9 | 1038 | mutex_init(&dev->lock); |
d8b4b582 | 1039 | setup_timer(&dev->timer_keyup, ir_timer_keyup, (unsigned long)dev); |
bc2a6c57 | 1040 | |
d8b4b582 | 1041 | dev->dev.type = &rc_dev_type; |
40fc5325 | 1042 | dev->dev.class = &rc_class; |
d8b4b582 DH |
1043 | device_initialize(&dev->dev); |
1044 | ||
1045 | __module_get(THIS_MODULE); | |
1046 | return dev; | |
1047 | } | |
1048 | EXPORT_SYMBOL_GPL(rc_allocate_device); | |
1049 | ||
1050 | void rc_free_device(struct rc_dev *dev) | |
bc2a6c57 | 1051 | { |
b05681b9 MCC |
1052 | if (!dev) |
1053 | return; | |
1054 | ||
1055 | if (dev->input_dev) | |
d8b4b582 | 1056 | input_free_device(dev->input_dev); |
b05681b9 MCC |
1057 | |
1058 | put_device(&dev->dev); | |
1059 | ||
1060 | kfree(dev); | |
1061 | module_put(THIS_MODULE); | |
d8b4b582 DH |
1062 | } |
1063 | EXPORT_SYMBOL_GPL(rc_free_device); | |
1064 | ||
1065 | int rc_register_device(struct rc_dev *dev) | |
1066 | { | |
5da6e984 | 1067 | static bool raw_init = false; /* raw decoders loaded? */ |
d8b4b582 | 1068 | static atomic_t devno = ATOMIC_INIT(0); |
b088ba65 | 1069 | struct rc_map *rc_map; |
bc2a6c57 | 1070 | const char *path; |
d8b4b582 | 1071 | int rc; |
bc2a6c57 | 1072 | |
d8b4b582 DH |
1073 | if (!dev || !dev->map_name) |
1074 | return -EINVAL; | |
bc2a6c57 | 1075 | |
d100e659 | 1076 | rc_map = rc_map_get(dev->map_name); |
b088ba65 | 1077 | if (!rc_map) |
d100e659 | 1078 | rc_map = rc_map_get(RC_MAP_EMPTY); |
b088ba65 | 1079 | if (!rc_map || !rc_map->scan || rc_map->size == 0) |
d8b4b582 DH |
1080 | return -EINVAL; |
1081 | ||
1082 | set_bit(EV_KEY, dev->input_dev->evbit); | |
1083 | set_bit(EV_REP, dev->input_dev->evbit); | |
1084 | set_bit(EV_MSC, dev->input_dev->evbit); | |
1085 | set_bit(MSC_SCAN, dev->input_dev->mscbit); | |
1086 | if (dev->open) | |
1087 | dev->input_dev->open = ir_open; | |
1088 | if (dev->close) | |
1089 | dev->input_dev->close = ir_close; | |
1090 | ||
08aeb7c9 JW |
1091 | /* |
1092 | * Take the lock here, as the device sysfs node will appear | |
1093 | * when device_add() is called, which may trigger an ir-keytable udev | |
9719afae DH |
1094 | * rule, which will in turn call show_protocols and access |
1095 | * dev->enabled_protocols before it has been initialized. | |
08aeb7c9 JW |
1096 | */ |
1097 | mutex_lock(&dev->lock); | |
1098 | ||
d8b4b582 DH |
1099 | dev->devno = (unsigned long)(atomic_inc_return(&devno) - 1); |
1100 | dev_set_name(&dev->dev, "rc%ld", dev->devno); | |
1101 | dev_set_drvdata(&dev->dev, dev); | |
1102 | rc = device_add(&dev->dev); | |
1103 | if (rc) | |
08aeb7c9 | 1104 | goto out_unlock; |
bc2a6c57 | 1105 | |
b088ba65 | 1106 | rc = ir_setkeytable(dev, rc_map); |
d8b4b582 DH |
1107 | if (rc) |
1108 | goto out_dev; | |
1109 | ||
1110 | dev->input_dev->dev.parent = &dev->dev; | |
1111 | memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id)); | |
1112 | dev->input_dev->phys = dev->input_phys; | |
1113 | dev->input_dev->name = dev->input_name; | |
8b2ff320 SK |
1114 | |
1115 | /* input_register_device can call ir_open, so unlock mutex here */ | |
1116 | mutex_unlock(&dev->lock); | |
1117 | ||
d8b4b582 | 1118 | rc = input_register_device(dev->input_dev); |
8b2ff320 SK |
1119 | |
1120 | mutex_lock(&dev->lock); | |
1121 | ||
d8b4b582 DH |
1122 | if (rc) |
1123 | goto out_table; | |
bc2a6c57 | 1124 | |
d8b4b582 | 1125 | /* |
25985edc | 1126 | * Default delay of 250ms is too short for some protocols, especially |
d8b4b582 DH |
1127 | * since the timeout is currently set to 250ms. Increase it to 500ms, |
1128 | * to avoid wrong repetition of the keycodes. Note that this must be | |
1129 | * set after the call to input_register_device(). | |
1130 | */ | |
1131 | dev->input_dev->rep[REP_DELAY] = 500; | |
1132 | ||
ca540c8b MCC |
1133 | /* |
1134 | * As a repeat event on protocols like RC-5 and NEC take as long as | |
1135 | * 110/114ms, using 33ms as a repeat period is not the right thing | |
1136 | * to do. | |
1137 | */ | |
1138 | dev->input_dev->rep[REP_PERIOD] = 125; | |
1139 | ||
d8b4b582 | 1140 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
bc2a6c57 | 1141 | printk(KERN_INFO "%s: %s as %s\n", |
d8b4b582 DH |
1142 | dev_name(&dev->dev), |
1143 | dev->input_name ? dev->input_name : "Unspecified device", | |
bc2a6c57 MCC |
1144 | path ? path : "N/A"); |
1145 | kfree(path); | |
1146 | ||
d8b4b582 | 1147 | if (dev->driver_type == RC_DRIVER_IR_RAW) { |
5da6e984 EG |
1148 | /* Load raw decoders, if they aren't already */ |
1149 | if (!raw_init) { | |
1150 | IR_dprintk(1, "Loading raw decoders\n"); | |
1151 | ir_raw_init(); | |
1152 | raw_init = true; | |
1153 | } | |
d8b4b582 DH |
1154 | rc = ir_raw_event_register(dev); |
1155 | if (rc < 0) | |
1156 | goto out_input; | |
1157 | } | |
1158 | ||
1159 | if (dev->change_protocol) { | |
c003ab1b DH |
1160 | u64 rc_type = (1 << rc_map->rc_type); |
1161 | rc = dev->change_protocol(dev, &rc_type); | |
d8b4b582 DH |
1162 | if (rc < 0) |
1163 | goto out_raw; | |
9719afae | 1164 | dev->enabled_protocols = rc_type; |
d8b4b582 DH |
1165 | } |
1166 | ||
0528f354 DC |
1167 | mutex_unlock(&dev->lock); |
1168 | ||
d8b4b582 DH |
1169 | IR_dprintk(1, "Registered rc%ld (driver: %s, remote: %s, mode %s)\n", |
1170 | dev->devno, | |
1171 | dev->driver_name ? dev->driver_name : "unknown", | |
b088ba65 | 1172 | rc_map->name ? rc_map->name : "unknown", |
d8b4b582 DH |
1173 | dev->driver_type == RC_DRIVER_IR_RAW ? "raw" : "cooked"); |
1174 | ||
bc2a6c57 | 1175 | return 0; |
d8b4b582 DH |
1176 | |
1177 | out_raw: | |
1178 | if (dev->driver_type == RC_DRIVER_IR_RAW) | |
1179 | ir_raw_event_unregister(dev); | |
1180 | out_input: | |
1181 | input_unregister_device(dev->input_dev); | |
1182 | dev->input_dev = NULL; | |
1183 | out_table: | |
b088ba65 | 1184 | ir_free_table(&dev->rc_map); |
d8b4b582 DH |
1185 | out_dev: |
1186 | device_del(&dev->dev); | |
08aeb7c9 JW |
1187 | out_unlock: |
1188 | mutex_unlock(&dev->lock); | |
d8b4b582 | 1189 | return rc; |
bc2a6c57 | 1190 | } |
d8b4b582 | 1191 | EXPORT_SYMBOL_GPL(rc_register_device); |
bc2a6c57 | 1192 | |
d8b4b582 | 1193 | void rc_unregister_device(struct rc_dev *dev) |
bc2a6c57 | 1194 | { |
d8b4b582 DH |
1195 | if (!dev) |
1196 | return; | |
bc2a6c57 | 1197 | |
d8b4b582 | 1198 | del_timer_sync(&dev->timer_keyup); |
bc2a6c57 | 1199 | |
d8b4b582 DH |
1200 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1201 | ir_raw_event_unregister(dev); | |
1202 | ||
b05681b9 MCC |
1203 | /* Freeing the table should also call the stop callback */ |
1204 | ir_free_table(&dev->rc_map); | |
1205 | IR_dprintk(1, "Freed keycode table\n"); | |
1206 | ||
d8b4b582 DH |
1207 | input_unregister_device(dev->input_dev); |
1208 | dev->input_dev = NULL; | |
1209 | ||
b05681b9 | 1210 | device_del(&dev->dev); |
d8b4b582 | 1211 | |
b05681b9 | 1212 | rc_free_device(dev); |
bc2a6c57 | 1213 | } |
b05681b9 | 1214 | |
d8b4b582 | 1215 | EXPORT_SYMBOL_GPL(rc_unregister_device); |
bc2a6c57 MCC |
1216 | |
1217 | /* | |
1218 | * Init/exit code for the module. Basically, creates/removes /sys/class/rc | |
1219 | */ | |
1220 | ||
6bda9644 | 1221 | static int __init rc_core_init(void) |
bc2a6c57 | 1222 | { |
40fc5325 | 1223 | int rc = class_register(&rc_class); |
bc2a6c57 | 1224 | if (rc) { |
6bda9644 | 1225 | printk(KERN_ERR "rc_core: unable to register rc class\n"); |
bc2a6c57 MCC |
1226 | return rc; |
1227 | } | |
1228 | ||
153a60bb | 1229 | led_trigger_register_simple("rc-feedback", &led_feedback); |
d100e659 | 1230 | rc_map_register(&empty_map); |
bc2a6c57 MCC |
1231 | |
1232 | return 0; | |
1233 | } | |
1234 | ||
6bda9644 | 1235 | static void __exit rc_core_exit(void) |
bc2a6c57 | 1236 | { |
40fc5325 | 1237 | class_unregister(&rc_class); |
153a60bb | 1238 | led_trigger_unregister_simple(led_feedback); |
d100e659 | 1239 | rc_map_unregister(&empty_map); |
bc2a6c57 MCC |
1240 | } |
1241 | ||
e76d4ce4 | 1242 | subsys_initcall(rc_core_init); |
6bda9644 | 1243 | module_exit(rc_core_exit); |
bc2a6c57 | 1244 | |
6bda9644 MCC |
1245 | int rc_core_debug; /* ir_debug level (0,1,2) */ |
1246 | EXPORT_SYMBOL_GPL(rc_core_debug); | |
1247 | module_param_named(debug, rc_core_debug, int, 0644); | |
446e4a64 MCC |
1248 | |
1249 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); | |
1250 | MODULE_LICENSE("GPL"); |