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 | |
587d1b06 MCC |
25 | /* Bitmap to store allocated device numbers from 0 to IRRCV_NUM_DEVICES - 1 */ |
26 | #define IRRCV_NUM_DEVICES 256 | |
692a228e | 27 | static DECLARE_BITMAP(ir_core_dev_number, IRRCV_NUM_DEVICES); |
587d1b06 | 28 | |
b3074c0a DH |
29 | /* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */ |
30 | #define IR_TAB_MIN_SIZE 256 | |
31 | #define IR_TAB_MAX_SIZE 8192 | |
f6fc5049 | 32 | |
a374fef4 DH |
33 | /* FIXME: IR_KEYPRESS_TIMEOUT should be protocol specific */ |
34 | #define IR_KEYPRESS_TIMEOUT 250 | |
35 | ||
4c7b355d | 36 | /* Used to keep track of known keymaps */ |
631493ec MCC |
37 | static LIST_HEAD(rc_map_list); |
38 | static DEFINE_SPINLOCK(rc_map_lock); | |
153a60bb | 39 | static struct led_trigger *led_feedback; |
631493ec | 40 | |
d100e659 | 41 | static struct rc_map_list *seek_rc_map(const char *name) |
631493ec | 42 | { |
d100e659 | 43 | struct rc_map_list *map = NULL; |
631493ec MCC |
44 | |
45 | spin_lock(&rc_map_lock); | |
46 | list_for_each_entry(map, &rc_map_list, list) { | |
47 | if (!strcmp(name, map->map.name)) { | |
48 | spin_unlock(&rc_map_lock); | |
49 | return map; | |
50 | } | |
51 | } | |
52 | spin_unlock(&rc_map_lock); | |
53 | ||
54 | return NULL; | |
55 | } | |
56 | ||
d100e659 | 57 | struct rc_map *rc_map_get(const char *name) |
631493ec MCC |
58 | { |
59 | ||
d100e659 | 60 | struct rc_map_list *map; |
631493ec MCC |
61 | |
62 | map = seek_rc_map(name); | |
63 | #ifdef MODULE | |
64 | if (!map) { | |
65 | int rc = request_module(name); | |
66 | if (rc < 0) { | |
67 | printk(KERN_ERR "Couldn't load IR keymap %s\n", name); | |
68 | return NULL; | |
69 | } | |
70 | msleep(20); /* Give some time for IR to register */ | |
71 | ||
72 | map = seek_rc_map(name); | |
73 | } | |
74 | #endif | |
75 | if (!map) { | |
76 | printk(KERN_ERR "IR keymap %s not found\n", name); | |
77 | return NULL; | |
78 | } | |
79 | ||
80 | printk(KERN_INFO "Registered IR keymap %s\n", map->map.name); | |
81 | ||
82 | return &map->map; | |
83 | } | |
d100e659 | 84 | EXPORT_SYMBOL_GPL(rc_map_get); |
631493ec | 85 | |
d100e659 | 86 | int rc_map_register(struct rc_map_list *map) |
631493ec MCC |
87 | { |
88 | spin_lock(&rc_map_lock); | |
89 | list_add_tail(&map->list, &rc_map_list); | |
90 | spin_unlock(&rc_map_lock); | |
91 | return 0; | |
92 | } | |
d100e659 | 93 | EXPORT_SYMBOL_GPL(rc_map_register); |
631493ec | 94 | |
d100e659 | 95 | void rc_map_unregister(struct rc_map_list *map) |
631493ec MCC |
96 | { |
97 | spin_lock(&rc_map_lock); | |
98 | list_del(&map->list); | |
99 | spin_unlock(&rc_map_lock); | |
100 | } | |
d100e659 | 101 | EXPORT_SYMBOL_GPL(rc_map_unregister); |
631493ec MCC |
102 | |
103 | ||
2f4f58d6 | 104 | static struct rc_map_table empty[] = { |
631493ec MCC |
105 | { 0x2a, KEY_COFFEE }, |
106 | }; | |
107 | ||
d100e659 | 108 | static struct rc_map_list empty_map = { |
631493ec MCC |
109 | .map = { |
110 | .scan = empty, | |
111 | .size = ARRAY_SIZE(empty), | |
52b66144 | 112 | .rc_type = RC_TYPE_UNKNOWN, /* Legacy IR type */ |
631493ec MCC |
113 | .name = RC_MAP_EMPTY, |
114 | } | |
115 | }; | |
116 | ||
9f470095 DT |
117 | /** |
118 | * ir_create_table() - initializes a scancode table | |
b088ba65 | 119 | * @rc_map: the rc_map to initialize |
9f470095 | 120 | * @name: name to assign to the table |
52b66144 | 121 | * @rc_type: ir type to assign to the new table |
9f470095 DT |
122 | * @size: initial size of the table |
123 | * @return: zero on success or a negative error code | |
124 | * | |
b088ba65 | 125 | * This routine will initialize the rc_map and will allocate |
d8b4b582 | 126 | * memory to hold at least the specified number of elements. |
9f470095 | 127 | */ |
b088ba65 | 128 | static int ir_create_table(struct rc_map *rc_map, |
52b66144 | 129 | const char *name, u64 rc_type, size_t size) |
9f470095 | 130 | { |
b088ba65 MCC |
131 | rc_map->name = name; |
132 | rc_map->rc_type = rc_type; | |
2f4f58d6 MCC |
133 | rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table)); |
134 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); | |
b088ba65 MCC |
135 | rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL); |
136 | if (!rc_map->scan) | |
9f470095 DT |
137 | return -ENOMEM; |
138 | ||
139 | IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", | |
b088ba65 | 140 | rc_map->size, rc_map->alloc); |
9f470095 DT |
141 | return 0; |
142 | } | |
143 | ||
144 | /** | |
145 | * ir_free_table() - frees memory allocated by a scancode table | |
b088ba65 | 146 | * @rc_map: the table whose mappings need to be freed |
9f470095 DT |
147 | * |
148 | * This routine will free memory alloctaed for key mappings used by given | |
149 | * scancode table. | |
150 | */ | |
b088ba65 | 151 | static void ir_free_table(struct rc_map *rc_map) |
9f470095 | 152 | { |
b088ba65 MCC |
153 | rc_map->size = 0; |
154 | kfree(rc_map->scan); | |
155 | rc_map->scan = NULL; | |
9f470095 DT |
156 | } |
157 | ||
7fee03e4 | 158 | /** |
b3074c0a | 159 | * ir_resize_table() - resizes a scancode table if necessary |
b088ba65 | 160 | * @rc_map: the rc_map to resize |
9f470095 | 161 | * @gfp_flags: gfp flags to use when allocating memory |
b3074c0a | 162 | * @return: zero on success or a negative error code |
7fee03e4 | 163 | * |
b088ba65 | 164 | * This routine will shrink the rc_map if it has lots of |
b3074c0a | 165 | * unused entries and grow it if it is full. |
7fee03e4 | 166 | */ |
b088ba65 | 167 | static int ir_resize_table(struct rc_map *rc_map, gfp_t gfp_flags) |
7fee03e4 | 168 | { |
b088ba65 | 169 | unsigned int oldalloc = rc_map->alloc; |
b3074c0a | 170 | unsigned int newalloc = oldalloc; |
2f4f58d6 MCC |
171 | struct rc_map_table *oldscan = rc_map->scan; |
172 | struct rc_map_table *newscan; | |
b3074c0a | 173 | |
b088ba65 | 174 | if (rc_map->size == rc_map->len) { |
b3074c0a | 175 | /* All entries in use -> grow keytable */ |
b088ba65 | 176 | if (rc_map->alloc >= IR_TAB_MAX_SIZE) |
b3074c0a | 177 | return -ENOMEM; |
7fee03e4 | 178 | |
b3074c0a DH |
179 | newalloc *= 2; |
180 | IR_dprintk(1, "Growing table to %u bytes\n", newalloc); | |
181 | } | |
7fee03e4 | 182 | |
b088ba65 | 183 | if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) { |
b3074c0a DH |
184 | /* Less than 1/3 of entries in use -> shrink keytable */ |
185 | newalloc /= 2; | |
186 | IR_dprintk(1, "Shrinking table to %u bytes\n", newalloc); | |
187 | } | |
7fee03e4 | 188 | |
b3074c0a DH |
189 | if (newalloc == oldalloc) |
190 | return 0; | |
7fee03e4 | 191 | |
9f470095 | 192 | newscan = kmalloc(newalloc, gfp_flags); |
b3074c0a DH |
193 | if (!newscan) { |
194 | IR_dprintk(1, "Failed to kmalloc %u bytes\n", newalloc); | |
195 | return -ENOMEM; | |
196 | } | |
7fee03e4 | 197 | |
2f4f58d6 | 198 | memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table)); |
b088ba65 MCC |
199 | rc_map->scan = newscan; |
200 | rc_map->alloc = newalloc; | |
2f4f58d6 | 201 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); |
b3074c0a DH |
202 | kfree(oldscan); |
203 | return 0; | |
7fee03e4 MCC |
204 | } |
205 | ||
f6fc5049 | 206 | /** |
9f470095 | 207 | * ir_update_mapping() - set a keycode in the scancode->keycode table |
d8b4b582 | 208 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 209 | * @rc_map: scancode table to be adjusted |
9f470095 DT |
210 | * @index: index of the mapping that needs to be updated |
211 | * @keycode: the desired keycode | |
212 | * @return: previous keycode assigned to the mapping | |
213 | * | |
d8b4b582 | 214 | * This routine is used to update scancode->keycode mapping at given |
9f470095 DT |
215 | * position. |
216 | */ | |
d8b4b582 | 217 | static unsigned int ir_update_mapping(struct rc_dev *dev, |
b088ba65 | 218 | struct rc_map *rc_map, |
9f470095 DT |
219 | unsigned int index, |
220 | unsigned int new_keycode) | |
221 | { | |
b088ba65 | 222 | int old_keycode = rc_map->scan[index].keycode; |
9f470095 DT |
223 | int i; |
224 | ||
225 | /* Did the user wish to remove the mapping? */ | |
226 | if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) { | |
227 | IR_dprintk(1, "#%d: Deleting scan 0x%04x\n", | |
b088ba65 MCC |
228 | index, rc_map->scan[index].scancode); |
229 | rc_map->len--; | |
230 | memmove(&rc_map->scan[index], &rc_map->scan[index+ 1], | |
2f4f58d6 | 231 | (rc_map->len - index) * sizeof(struct rc_map_table)); |
9f470095 DT |
232 | } else { |
233 | IR_dprintk(1, "#%d: %s scan 0x%04x with key 0x%04x\n", | |
234 | index, | |
235 | old_keycode == KEY_RESERVED ? "New" : "Replacing", | |
b088ba65 MCC |
236 | rc_map->scan[index].scancode, new_keycode); |
237 | rc_map->scan[index].keycode = new_keycode; | |
d8b4b582 | 238 | __set_bit(new_keycode, dev->input_dev->keybit); |
9f470095 DT |
239 | } |
240 | ||
241 | if (old_keycode != KEY_RESERVED) { | |
242 | /* A previous mapping was updated... */ | |
d8b4b582 | 243 | __clear_bit(old_keycode, dev->input_dev->keybit); |
9f470095 | 244 | /* ... but another scancode might use the same keycode */ |
b088ba65 MCC |
245 | for (i = 0; i < rc_map->len; i++) { |
246 | if (rc_map->scan[i].keycode == old_keycode) { | |
d8b4b582 | 247 | __set_bit(old_keycode, dev->input_dev->keybit); |
9f470095 DT |
248 | break; |
249 | } | |
250 | } | |
251 | ||
252 | /* Possibly shrink the keytable, failure is not a problem */ | |
b088ba65 | 253 | ir_resize_table(rc_map, GFP_ATOMIC); |
9f470095 DT |
254 | } |
255 | ||
256 | return old_keycode; | |
257 | } | |
258 | ||
259 | /** | |
4c7b355d | 260 | * ir_establish_scancode() - set a keycode in the scancode->keycode table |
d8b4b582 | 261 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 262 | * @rc_map: scancode table to be searched |
9f470095 DT |
263 | * @scancode: the desired scancode |
264 | * @resize: controls whether we allowed to resize the table to | |
25985edc | 265 | * accommodate not yet present scancodes |
9f470095 DT |
266 | * @return: index of the mapping containing scancode in question |
267 | * or -1U in case of failure. | |
f6fc5049 | 268 | * |
b088ba65 | 269 | * This routine is used to locate given scancode in rc_map. |
9f470095 DT |
270 | * If scancode is not yet present the routine will allocate a new slot |
271 | * for it. | |
f6fc5049 | 272 | */ |
d8b4b582 | 273 | static unsigned int ir_establish_scancode(struct rc_dev *dev, |
b088ba65 | 274 | struct rc_map *rc_map, |
9f470095 DT |
275 | unsigned int scancode, |
276 | bool resize) | |
f6fc5049 | 277 | { |
b3074c0a | 278 | unsigned int i; |
9dfe4e83 MCC |
279 | |
280 | /* | |
281 | * Unfortunately, some hardware-based IR decoders don't provide | |
282 | * all bits for the complete IR code. In general, they provide only | |
283 | * the command part of the IR code. Yet, as it is possible to replace | |
284 | * the provided IR with another one, it is needed to allow loading | |
d8b4b582 DH |
285 | * IR tables from other remotes. So, we support specifying a mask to |
286 | * indicate the valid bits of the scancodes. | |
9dfe4e83 | 287 | */ |
d8b4b582 DH |
288 | if (dev->scanmask) |
289 | scancode &= dev->scanmask; | |
b3074c0a DH |
290 | |
291 | /* First check if we already have a mapping for this ir command */ | |
b088ba65 MCC |
292 | for (i = 0; i < rc_map->len; i++) { |
293 | if (rc_map->scan[i].scancode == scancode) | |
9f470095 DT |
294 | return i; |
295 | ||
b3074c0a | 296 | /* Keytable is sorted from lowest to highest scancode */ |
b088ba65 | 297 | if (rc_map->scan[i].scancode >= scancode) |
b3074c0a | 298 | break; |
b3074c0a | 299 | } |
f6fc5049 | 300 | |
9f470095 | 301 | /* No previous mapping found, we might need to grow the table */ |
b088ba65 MCC |
302 | if (rc_map->size == rc_map->len) { |
303 | if (!resize || ir_resize_table(rc_map, GFP_ATOMIC)) | |
9f470095 DT |
304 | return -1U; |
305 | } | |
35438946 | 306 | |
9f470095 | 307 | /* i is the proper index to insert our new keycode */ |
b088ba65 MCC |
308 | if (i < rc_map->len) |
309 | memmove(&rc_map->scan[i + 1], &rc_map->scan[i], | |
2f4f58d6 | 310 | (rc_map->len - i) * sizeof(struct rc_map_table)); |
b088ba65 MCC |
311 | rc_map->scan[i].scancode = scancode; |
312 | rc_map->scan[i].keycode = KEY_RESERVED; | |
313 | rc_map->len++; | |
f6fc5049 | 314 | |
9f470095 | 315 | return i; |
f6fc5049 MCC |
316 | } |
317 | ||
ef53a115 | 318 | /** |
b3074c0a | 319 | * ir_setkeycode() - set a keycode in the scancode->keycode table |
d8b4b582 | 320 | * @idev: the struct input_dev device descriptor |
ef53a115 | 321 | * @scancode: the desired scancode |
b3074c0a DH |
322 | * @keycode: result |
323 | * @return: -EINVAL if the keycode could not be inserted, otherwise zero. | |
ef53a115 | 324 | * |
b3074c0a | 325 | * This routine is used to handle evdev EVIOCSKEY ioctl. |
ef53a115 | 326 | */ |
d8b4b582 | 327 | static int ir_setkeycode(struct input_dev *idev, |
9f470095 DT |
328 | const struct input_keymap_entry *ke, |
329 | unsigned int *old_keycode) | |
ef53a115 | 330 | { |
d8b4b582 | 331 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 332 | struct rc_map *rc_map = &rdev->rc_map; |
9f470095 DT |
333 | unsigned int index; |
334 | unsigned int scancode; | |
dea8a39f | 335 | int retval = 0; |
9f470095 | 336 | unsigned long flags; |
ef53a115 | 337 | |
b088ba65 | 338 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
339 | |
340 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
341 | index = ke->index; | |
b088ba65 | 342 | if (index >= rc_map->len) { |
9f470095 DT |
343 | retval = -EINVAL; |
344 | goto out; | |
345 | } | |
346 | } else { | |
347 | retval = input_scancode_to_scalar(ke, &scancode); | |
348 | if (retval) | |
349 | goto out; | |
350 | ||
b088ba65 MCC |
351 | index = ir_establish_scancode(rdev, rc_map, scancode, true); |
352 | if (index >= rc_map->len) { | |
9f470095 DT |
353 | retval = -ENOMEM; |
354 | goto out; | |
355 | } | |
356 | } | |
357 | ||
b088ba65 | 358 | *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode); |
9f470095 DT |
359 | |
360 | out: | |
b088ba65 | 361 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 362 | return retval; |
e97f4677 MCC |
363 | } |
364 | ||
365 | /** | |
b3074c0a | 366 | * ir_setkeytable() - sets several entries in the scancode->keycode table |
d8b4b582 | 367 | * @dev: the struct rc_dev device descriptor |
b088ba65 MCC |
368 | * @to: the struct rc_map to copy entries to |
369 | * @from: the struct rc_map to copy entries from | |
9f470095 | 370 | * @return: -ENOMEM if all keycodes could not be inserted, otherwise zero. |
e97f4677 | 371 | * |
b3074c0a | 372 | * This routine is used to handle table initialization. |
e97f4677 | 373 | */ |
d8b4b582 | 374 | static int ir_setkeytable(struct rc_dev *dev, |
b088ba65 | 375 | const struct rc_map *from) |
e97f4677 | 376 | { |
b088ba65 | 377 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
378 | unsigned int i, index; |
379 | int rc; | |
380 | ||
b088ba65 | 381 | rc = ir_create_table(rc_map, from->name, |
52b66144 | 382 | from->rc_type, from->size); |
9f470095 DT |
383 | if (rc) |
384 | return rc; | |
385 | ||
386 | IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", | |
b088ba65 | 387 | rc_map->size, rc_map->alloc); |
e97f4677 | 388 | |
b3074c0a | 389 | for (i = 0; i < from->size; i++) { |
b088ba65 | 390 | index = ir_establish_scancode(dev, rc_map, |
9f470095 | 391 | from->scan[i].scancode, false); |
b088ba65 | 392 | if (index >= rc_map->len) { |
9f470095 | 393 | rc = -ENOMEM; |
b3074c0a | 394 | break; |
9f470095 DT |
395 | } |
396 | ||
b088ba65 | 397 | ir_update_mapping(dev, rc_map, index, |
9f470095 | 398 | from->scan[i].keycode); |
e97f4677 | 399 | } |
9f470095 DT |
400 | |
401 | if (rc) | |
b088ba65 | 402 | ir_free_table(rc_map); |
9f470095 | 403 | |
b3074c0a | 404 | return rc; |
ef53a115 MCC |
405 | } |
406 | ||
9f470095 DT |
407 | /** |
408 | * ir_lookup_by_scancode() - locate mapping by scancode | |
b088ba65 | 409 | * @rc_map: the struct rc_map to search |
9f470095 DT |
410 | * @scancode: scancode to look for in the table |
411 | * @return: index in the table, -1U if not found | |
412 | * | |
413 | * This routine performs binary search in RC keykeymap table for | |
414 | * given scancode. | |
415 | */ | |
b088ba65 | 416 | static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map, |
9f470095 DT |
417 | unsigned int scancode) |
418 | { | |
0d07025e | 419 | int start = 0; |
b088ba65 | 420 | int end = rc_map->len - 1; |
0d07025e | 421 | int mid; |
9f470095 DT |
422 | |
423 | while (start <= end) { | |
424 | mid = (start + end) / 2; | |
b088ba65 | 425 | if (rc_map->scan[mid].scancode < scancode) |
9f470095 | 426 | start = mid + 1; |
b088ba65 | 427 | else if (rc_map->scan[mid].scancode > scancode) |
9f470095 DT |
428 | end = mid - 1; |
429 | else | |
430 | return mid; | |
431 | } | |
432 | ||
433 | return -1U; | |
434 | } | |
435 | ||
ef53a115 | 436 | /** |
b3074c0a | 437 | * ir_getkeycode() - get a keycode from the scancode->keycode table |
d8b4b582 | 438 | * @idev: the struct input_dev device descriptor |
ef53a115 | 439 | * @scancode: the desired scancode |
b3074c0a DH |
440 | * @keycode: used to return the keycode, if found, or KEY_RESERVED |
441 | * @return: always returns zero. | |
ef53a115 | 442 | * |
b3074c0a | 443 | * This routine is used to handle evdev EVIOCGKEY ioctl. |
ef53a115 | 444 | */ |
d8b4b582 | 445 | static int ir_getkeycode(struct input_dev *idev, |
9f470095 | 446 | struct input_keymap_entry *ke) |
ef53a115 | 447 | { |
d8b4b582 | 448 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 449 | struct rc_map *rc_map = &rdev->rc_map; |
2f4f58d6 | 450 | struct rc_map_table *entry; |
9f470095 DT |
451 | unsigned long flags; |
452 | unsigned int index; | |
453 | unsigned int scancode; | |
454 | int retval; | |
ef53a115 | 455 | |
b088ba65 | 456 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
457 | |
458 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
459 | index = ke->index; | |
460 | } else { | |
461 | retval = input_scancode_to_scalar(ke, &scancode); | |
462 | if (retval) | |
463 | goto out; | |
464 | ||
b088ba65 | 465 | index = ir_lookup_by_scancode(rc_map, scancode); |
9f470095 DT |
466 | } |
467 | ||
54e74b87 DT |
468 | if (index < rc_map->len) { |
469 | entry = &rc_map->scan[index]; | |
470 | ||
471 | ke->index = index; | |
472 | ke->keycode = entry->keycode; | |
473 | ke->len = sizeof(entry->scancode); | |
474 | memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode)); | |
475 | ||
476 | } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) { | |
477 | /* | |
478 | * We do not really know the valid range of scancodes | |
479 | * so let's respond with KEY_RESERVED to anything we | |
480 | * do not have mapping for [yet]. | |
481 | */ | |
482 | ke->index = index; | |
483 | ke->keycode = KEY_RESERVED; | |
484 | } else { | |
9f470095 DT |
485 | retval = -EINVAL; |
486 | goto out; | |
e97f4677 MCC |
487 | } |
488 | ||
47c5ba53 DT |
489 | retval = 0; |
490 | ||
9f470095 | 491 | out: |
b088ba65 | 492 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 493 | return retval; |
ef53a115 MCC |
494 | } |
495 | ||
496 | /** | |
ca86674b | 497 | * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode |
d8b4b582 DH |
498 | * @dev: the struct rc_dev descriptor of the device |
499 | * @scancode: the scancode to look for | |
500 | * @return: the corresponding keycode, or KEY_RESERVED | |
ef53a115 | 501 | * |
d8b4b582 DH |
502 | * This routine is used by drivers which need to convert a scancode to a |
503 | * keycode. Normally it should not be used since drivers should have no | |
504 | * interest in keycodes. | |
ef53a115 | 505 | */ |
ca86674b | 506 | u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode) |
ef53a115 | 507 | { |
b088ba65 | 508 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
509 | unsigned int keycode; |
510 | unsigned int index; | |
511 | unsigned long flags; | |
512 | ||
b088ba65 | 513 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 | 514 | |
b088ba65 MCC |
515 | index = ir_lookup_by_scancode(rc_map, scancode); |
516 | keycode = index < rc_map->len ? | |
517 | rc_map->scan[index].keycode : KEY_RESERVED; | |
9f470095 | 518 | |
b088ba65 | 519 | spin_unlock_irqrestore(&rc_map->lock, flags); |
ef53a115 | 520 | |
35438946 MCC |
521 | if (keycode != KEY_RESERVED) |
522 | IR_dprintk(1, "%s: scancode 0x%04x keycode 0x%02x\n", | |
d8b4b582 | 523 | dev->input_name, scancode, keycode); |
9f470095 | 524 | |
b3074c0a | 525 | return keycode; |
ef53a115 | 526 | } |
ca86674b | 527 | EXPORT_SYMBOL_GPL(rc_g_keycode_from_table); |
ef53a115 | 528 | |
6660de56 | 529 | /** |
62c65031 | 530 | * ir_do_keyup() - internal function to signal the release of a keypress |
d8b4b582 | 531 | * @dev: the struct rc_dev descriptor of the device |
98c32bcd | 532 | * @sync: whether or not to call input_sync |
6660de56 | 533 | * |
62c65031 DH |
534 | * This function is used internally to release a keypress, it must be |
535 | * called with keylock held. | |
a374fef4 | 536 | */ |
98c32bcd | 537 | static void ir_do_keyup(struct rc_dev *dev, bool sync) |
a374fef4 | 538 | { |
d8b4b582 | 539 | if (!dev->keypressed) |
a374fef4 DH |
540 | return; |
541 | ||
d8b4b582 DH |
542 | IR_dprintk(1, "keyup key 0x%04x\n", dev->last_keycode); |
543 | input_report_key(dev->input_dev, dev->last_keycode, 0); | |
153a60bb | 544 | led_trigger_event(led_feedback, LED_OFF); |
98c32bcd JW |
545 | if (sync) |
546 | input_sync(dev->input_dev); | |
d8b4b582 | 547 | dev->keypressed = false; |
a374fef4 | 548 | } |
62c65031 DH |
549 | |
550 | /** | |
ca86674b | 551 | * rc_keyup() - signals the release of a keypress |
d8b4b582 | 552 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
553 | * |
554 | * This routine is used to signal that a key has been released on the | |
555 | * remote control. | |
556 | */ | |
ca86674b | 557 | void rc_keyup(struct rc_dev *dev) |
62c65031 DH |
558 | { |
559 | unsigned long flags; | |
62c65031 | 560 | |
d8b4b582 | 561 | spin_lock_irqsave(&dev->keylock, flags); |
98c32bcd | 562 | ir_do_keyup(dev, true); |
d8b4b582 | 563 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 564 | } |
ca86674b | 565 | EXPORT_SYMBOL_GPL(rc_keyup); |
a374fef4 DH |
566 | |
567 | /** | |
568 | * ir_timer_keyup() - generates a keyup event after a timeout | |
d8b4b582 | 569 | * @cookie: a pointer to the struct rc_dev for the device |
a374fef4 DH |
570 | * |
571 | * This routine will generate a keyup event some time after a keydown event | |
572 | * is generated when no further activity has been detected. | |
6660de56 | 573 | */ |
a374fef4 | 574 | static void ir_timer_keyup(unsigned long cookie) |
6660de56 | 575 | { |
d8b4b582 | 576 | struct rc_dev *dev = (struct rc_dev *)cookie; |
a374fef4 DH |
577 | unsigned long flags; |
578 | ||
579 | /* | |
580 | * ir->keyup_jiffies is used to prevent a race condition if a | |
581 | * hardware interrupt occurs at this point and the keyup timer | |
582 | * event is moved further into the future as a result. | |
583 | * | |
584 | * The timer will then be reactivated and this function called | |
585 | * again in the future. We need to exit gracefully in that case | |
586 | * to allow the input subsystem to do its auto-repeat magic or | |
587 | * a keyup event might follow immediately after the keydown. | |
588 | */ | |
d8b4b582 DH |
589 | spin_lock_irqsave(&dev->keylock, flags); |
590 | if (time_is_before_eq_jiffies(dev->keyup_jiffies)) | |
98c32bcd | 591 | ir_do_keyup(dev, true); |
d8b4b582 | 592 | spin_unlock_irqrestore(&dev->keylock, flags); |
a374fef4 DH |
593 | } |
594 | ||
595 | /** | |
ca86674b | 596 | * rc_repeat() - signals that a key is still pressed |
d8b4b582 | 597 | * @dev: the struct rc_dev descriptor of the device |
a374fef4 DH |
598 | * |
599 | * This routine is used by IR decoders when a repeat message which does | |
600 | * not include the necessary bits to reproduce the scancode has been | |
601 | * received. | |
602 | */ | |
ca86674b | 603 | void rc_repeat(struct rc_dev *dev) |
a374fef4 DH |
604 | { |
605 | unsigned long flags; | |
6660de56 | 606 | |
d8b4b582 | 607 | spin_lock_irqsave(&dev->keylock, flags); |
a374fef4 | 608 | |
d8b4b582 | 609 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode); |
98c32bcd | 610 | input_sync(dev->input_dev); |
ed4d3876 | 611 | |
d8b4b582 | 612 | if (!dev->keypressed) |
a374fef4 | 613 | goto out; |
6660de56 | 614 | |
d8b4b582 DH |
615 | dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); |
616 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
a374fef4 DH |
617 | |
618 | out: | |
d8b4b582 | 619 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 620 | } |
ca86674b | 621 | EXPORT_SYMBOL_GPL(rc_repeat); |
6660de56 MCC |
622 | |
623 | /** | |
62c65031 | 624 | * ir_do_keydown() - internal function to process a keypress |
d8b4b582 | 625 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
626 | * @scancode: the scancode of the keypress |
627 | * @keycode: the keycode of the keypress | |
628 | * @toggle: the toggle value of the keypress | |
6660de56 | 629 | * |
62c65031 DH |
630 | * This function is used internally to register a keypress, it must be |
631 | * called with keylock held. | |
6660de56 | 632 | */ |
d8b4b582 | 633 | static void ir_do_keydown(struct rc_dev *dev, int scancode, |
62c65031 | 634 | u32 keycode, u8 toggle) |
6660de56 | 635 | { |
98c32bcd JW |
636 | bool new_event = !dev->keypressed || |
637 | dev->last_scancode != scancode || | |
638 | dev->last_toggle != toggle; | |
6660de56 | 639 | |
98c32bcd JW |
640 | if (new_event && dev->keypressed) |
641 | ir_do_keyup(dev, false); | |
6660de56 | 642 | |
98c32bcd | 643 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode); |
a374fef4 | 644 | |
98c32bcd JW |
645 | if (new_event && keycode != KEY_RESERVED) { |
646 | /* Register a keypress */ | |
647 | dev->keypressed = true; | |
648 | dev->last_scancode = scancode; | |
649 | dev->last_toggle = toggle; | |
650 | dev->last_keycode = keycode; | |
651 | ||
652 | IR_dprintk(1, "%s: key down event, " | |
653 | "key 0x%04x, scancode 0x%04x\n", | |
654 | dev->input_name, keycode, scancode); | |
655 | input_report_key(dev->input_dev, keycode, 1); | |
70a2f912 JH |
656 | |
657 | led_trigger_event(led_feedback, LED_FULL); | |
98c32bcd | 658 | } |
ed4d3876 | 659 | |
d8b4b582 | 660 | input_sync(dev->input_dev); |
62c65031 | 661 | } |
6660de56 | 662 | |
62c65031 | 663 | /** |
ca86674b | 664 | * rc_keydown() - generates input event for a key press |
d8b4b582 | 665 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
666 | * @scancode: the scancode that we're seeking |
667 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't | |
668 | * support toggle values, this should be set to zero) | |
669 | * | |
d8b4b582 DH |
670 | * This routine is used to signal that a key has been pressed on the |
671 | * remote control. | |
62c65031 | 672 | */ |
ca86674b | 673 | void rc_keydown(struct rc_dev *dev, int scancode, u8 toggle) |
62c65031 DH |
674 | { |
675 | unsigned long flags; | |
ca86674b | 676 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 677 | |
d8b4b582 | 678 | spin_lock_irqsave(&dev->keylock, flags); |
62c65031 DH |
679 | ir_do_keydown(dev, scancode, keycode, toggle); |
680 | ||
d8b4b582 DH |
681 | if (dev->keypressed) { |
682 | dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); | |
683 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
62c65031 | 684 | } |
d8b4b582 | 685 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 686 | } |
ca86674b | 687 | EXPORT_SYMBOL_GPL(rc_keydown); |
6660de56 | 688 | |
62c65031 | 689 | /** |
ca86674b | 690 | * rc_keydown_notimeout() - generates input event for a key press without |
62c65031 | 691 | * an automatic keyup event at a later time |
d8b4b582 | 692 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
693 | * @scancode: the scancode that we're seeking |
694 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't | |
695 | * support toggle values, this should be set to zero) | |
696 | * | |
d8b4b582 | 697 | * This routine is used to signal that a key has been pressed on the |
ca86674b | 698 | * remote control. The driver must manually call rc_keyup() at a later stage. |
62c65031 | 699 | */ |
ca86674b | 700 | void rc_keydown_notimeout(struct rc_dev *dev, int scancode, u8 toggle) |
62c65031 DH |
701 | { |
702 | unsigned long flags; | |
ca86674b | 703 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 704 | |
d8b4b582 | 705 | spin_lock_irqsave(&dev->keylock, flags); |
62c65031 | 706 | ir_do_keydown(dev, scancode, keycode, toggle); |
d8b4b582 | 707 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 708 | } |
ca86674b | 709 | EXPORT_SYMBOL_GPL(rc_keydown_notimeout); |
62c65031 | 710 | |
8b2ff320 SK |
711 | int rc_open(struct rc_dev *rdev) |
712 | { | |
713 | int rval = 0; | |
714 | ||
715 | if (!rdev) | |
716 | return -EINVAL; | |
717 | ||
718 | mutex_lock(&rdev->lock); | |
f02dcdd1 | 719 | if (!rdev->users++ && rdev->open != NULL) |
8b2ff320 SK |
720 | rval = rdev->open(rdev); |
721 | ||
722 | if (rval) | |
723 | rdev->users--; | |
724 | ||
725 | mutex_unlock(&rdev->lock); | |
726 | ||
727 | return rval; | |
728 | } | |
729 | EXPORT_SYMBOL_GPL(rc_open); | |
730 | ||
d8b4b582 | 731 | static int ir_open(struct input_dev *idev) |
ef53a115 | 732 | { |
d8b4b582 | 733 | struct rc_dev *rdev = input_get_drvdata(idev); |
75543cce | 734 | |
8b2ff320 SK |
735 | return rc_open(rdev); |
736 | } | |
737 | ||
738 | void rc_close(struct rc_dev *rdev) | |
739 | { | |
740 | if (rdev) { | |
741 | mutex_lock(&rdev->lock); | |
742 | ||
f02dcdd1 | 743 | if (!--rdev->users && rdev->close != NULL) |
8b2ff320 SK |
744 | rdev->close(rdev); |
745 | ||
746 | mutex_unlock(&rdev->lock); | |
747 | } | |
ef53a115 | 748 | } |
8b2ff320 | 749 | EXPORT_SYMBOL_GPL(rc_close); |
d4b778d3 | 750 | |
d8b4b582 | 751 | static void ir_close(struct input_dev *idev) |
f6fc5049 | 752 | { |
d8b4b582 | 753 | struct rc_dev *rdev = input_get_drvdata(idev); |
8b2ff320 | 754 | rc_close(rdev); |
f6fc5049 | 755 | } |
f6fc5049 | 756 | |
bc2a6c57 | 757 | /* class for /sys/class/rc */ |
40fc5325 | 758 | static char *rc_devnode(struct device *dev, umode_t *mode) |
bc2a6c57 MCC |
759 | { |
760 | return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev)); | |
761 | } | |
762 | ||
40fc5325 | 763 | static struct class rc_class = { |
bc2a6c57 | 764 | .name = "rc", |
40fc5325 | 765 | .devnode = rc_devnode, |
bc2a6c57 MCC |
766 | }; |
767 | ||
c003ab1b DH |
768 | /* |
769 | * These are the protocol textual descriptions that are | |
770 | * used by the sysfs protocols file. Note that the order | |
771 | * of the entries is relevant. | |
772 | */ | |
bc2a6c57 MCC |
773 | static struct { |
774 | u64 type; | |
775 | char *name; | |
776 | } proto_names[] = { | |
c003ab1b DH |
777 | { RC_BIT_NONE, "none" }, |
778 | { RC_BIT_OTHER, "other" }, | |
779 | { RC_BIT_UNKNOWN, "unknown" }, | |
780 | { RC_BIT_RC5 | | |
781 | RC_BIT_RC5X, "rc-5" }, | |
782 | { RC_BIT_NEC, "nec" }, | |
783 | { RC_BIT_RC6_0 | | |
784 | RC_BIT_RC6_6A_20 | | |
785 | RC_BIT_RC6_6A_24 | | |
786 | RC_BIT_RC6_6A_32 | | |
787 | RC_BIT_RC6_MCE, "rc-6" }, | |
788 | { RC_BIT_JVC, "jvc" }, | |
789 | { RC_BIT_SONY12 | | |
790 | RC_BIT_SONY15 | | |
791 | RC_BIT_SONY20, "sony" }, | |
792 | { RC_BIT_RC5_SZ, "rc-5-sz" }, | |
793 | { RC_BIT_SANYO, "sanyo" }, | |
38f2a214 | 794 | { RC_BIT_SHARP, "sharp" }, |
c003ab1b DH |
795 | { RC_BIT_MCE_KBD, "mce_kbd" }, |
796 | { RC_BIT_LIRC, "lirc" }, | |
bc2a6c57 MCC |
797 | }; |
798 | ||
bc2a6c57 MCC |
799 | /** |
800 | * show_protocols() - shows the current IR protocol(s) | |
d8b4b582 | 801 | * @device: the device descriptor |
bc2a6c57 MCC |
802 | * @mattr: the device attribute struct (unused) |
803 | * @buf: a pointer to the output buffer | |
804 | * | |
805 | * This routine is a callback routine for input read the IR protocol type(s). | |
806 | * it is trigged by reading /sys/class/rc/rc?/protocols. | |
807 | * It returns the protocol names of supported protocols. | |
808 | * Enabled protocols are printed in brackets. | |
08aeb7c9 JW |
809 | * |
810 | * dev->lock is taken to guard against races between device | |
811 | * registration, store_protocols and show_protocols. | |
bc2a6c57 | 812 | */ |
d8b4b582 | 813 | static ssize_t show_protocols(struct device *device, |
bc2a6c57 MCC |
814 | struct device_attribute *mattr, char *buf) |
815 | { | |
d8b4b582 | 816 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 MCC |
817 | u64 allowed, enabled; |
818 | char *tmp = buf; | |
819 | int i; | |
820 | ||
821 | /* Device is being removed */ | |
d8b4b582 | 822 | if (!dev) |
bc2a6c57 MCC |
823 | return -EINVAL; |
824 | ||
08aeb7c9 JW |
825 | mutex_lock(&dev->lock); |
826 | ||
9719afae DH |
827 | enabled = dev->enabled_protocols; |
828 | if (dev->driver_type == RC_DRIVER_SCANCODE) | |
d8b4b582 | 829 | allowed = dev->allowed_protos; |
9719afae | 830 | else if (dev->raw) |
bc2a6c57 | 831 | allowed = ir_raw_get_allowed_protocols(); |
9719afae | 832 | else { |
30ebc5e4 | 833 | mutex_unlock(&dev->lock); |
720bb643 | 834 | return -ENODEV; |
30ebc5e4 | 835 | } |
bc2a6c57 MCC |
836 | |
837 | IR_dprintk(1, "allowed - 0x%llx, enabled - 0x%llx\n", | |
838 | (long long)allowed, | |
839 | (long long)enabled); | |
840 | ||
841 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
842 | if (allowed & enabled & proto_names[i].type) | |
843 | tmp += sprintf(tmp, "[%s] ", proto_names[i].name); | |
844 | else if (allowed & proto_names[i].type) | |
845 | tmp += sprintf(tmp, "%s ", proto_names[i].name); | |
c003ab1b DH |
846 | |
847 | if (allowed & proto_names[i].type) | |
848 | allowed &= ~proto_names[i].type; | |
bc2a6c57 MCC |
849 | } |
850 | ||
851 | if (tmp != buf) | |
852 | tmp--; | |
853 | *tmp = '\n'; | |
08aeb7c9 JW |
854 | |
855 | mutex_unlock(&dev->lock); | |
856 | ||
bc2a6c57 MCC |
857 | return tmp + 1 - buf; |
858 | } | |
859 | ||
860 | /** | |
861 | * store_protocols() - changes the current IR protocol(s) | |
d8b4b582 | 862 | * @device: the device descriptor |
bc2a6c57 MCC |
863 | * @mattr: the device attribute struct (unused) |
864 | * @buf: a pointer to the input buffer | |
865 | * @len: length of the input buffer | |
866 | * | |
d8b4b582 | 867 | * This routine is for changing the IR protocol type. |
bc2a6c57 MCC |
868 | * It is trigged by writing to /sys/class/rc/rc?/protocols. |
869 | * Writing "+proto" will add a protocol to the list of enabled protocols. | |
870 | * Writing "-proto" will remove a protocol from the list of enabled protocols. | |
871 | * Writing "proto" will enable only "proto". | |
872 | * Writing "none" will disable all protocols. | |
873 | * Returns -EINVAL if an invalid protocol combination or unknown protocol name | |
874 | * is used, otherwise @len. | |
08aeb7c9 JW |
875 | * |
876 | * dev->lock is taken to guard against races between device | |
877 | * registration, store_protocols and show_protocols. | |
bc2a6c57 | 878 | */ |
d8b4b582 | 879 | static ssize_t store_protocols(struct device *device, |
bc2a6c57 MCC |
880 | struct device_attribute *mattr, |
881 | const char *data, | |
882 | size_t len) | |
883 | { | |
d8b4b582 | 884 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 MCC |
885 | bool enable, disable; |
886 | const char *tmp; | |
887 | u64 type; | |
888 | u64 mask; | |
889 | int rc, i, count = 0; | |
08aeb7c9 | 890 | ssize_t ret; |
bc2a6c57 MCC |
891 | |
892 | /* Device is being removed */ | |
d8b4b582 | 893 | if (!dev) |
bc2a6c57 MCC |
894 | return -EINVAL; |
895 | ||
08aeb7c9 JW |
896 | mutex_lock(&dev->lock); |
897 | ||
9719afae | 898 | if (dev->driver_type != RC_DRIVER_SCANCODE && !dev->raw) { |
bc2a6c57 | 899 | IR_dprintk(1, "Protocol switching not supported\n"); |
08aeb7c9 JW |
900 | ret = -EINVAL; |
901 | goto out; | |
bc2a6c57 | 902 | } |
9719afae | 903 | type = dev->enabled_protocols; |
bc2a6c57 MCC |
904 | |
905 | while ((tmp = strsep((char **) &data, " \n")) != NULL) { | |
906 | if (!*tmp) | |
907 | break; | |
908 | ||
909 | if (*tmp == '+') { | |
910 | enable = true; | |
911 | disable = false; | |
912 | tmp++; | |
913 | } else if (*tmp == '-') { | |
914 | enable = false; | |
915 | disable = true; | |
916 | tmp++; | |
917 | } else { | |
918 | enable = false; | |
919 | disable = false; | |
920 | } | |
921 | ||
c003ab1b DH |
922 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { |
923 | if (!strcasecmp(tmp, proto_names[i].name)) { | |
924 | mask = proto_names[i].type; | |
925 | break; | |
bc2a6c57 | 926 | } |
bc2a6c57 MCC |
927 | } |
928 | ||
c003ab1b DH |
929 | if (i == ARRAY_SIZE(proto_names)) { |
930 | IR_dprintk(1, "Unknown protocol: '%s'\n", tmp); | |
afe5624b DC |
931 | ret = -EINVAL; |
932 | goto out; | |
c003ab1b DH |
933 | } |
934 | ||
935 | count++; | |
936 | ||
bc2a6c57 MCC |
937 | if (enable) |
938 | type |= mask; | |
939 | else if (disable) | |
940 | type &= ~mask; | |
941 | else | |
942 | type = mask; | |
943 | } | |
944 | ||
945 | if (!count) { | |
946 | IR_dprintk(1, "Protocol not specified\n"); | |
08aeb7c9 JW |
947 | ret = -EINVAL; |
948 | goto out; | |
bc2a6c57 MCC |
949 | } |
950 | ||
d8b4b582 | 951 | if (dev->change_protocol) { |
c003ab1b | 952 | rc = dev->change_protocol(dev, &type); |
bc2a6c57 MCC |
953 | if (rc < 0) { |
954 | IR_dprintk(1, "Error setting protocols to 0x%llx\n", | |
955 | (long long)type); | |
08aeb7c9 JW |
956 | ret = -EINVAL; |
957 | goto out; | |
bc2a6c57 MCC |
958 | } |
959 | } | |
960 | ||
9719afae | 961 | dev->enabled_protocols = type; |
bc2a6c57 MCC |
962 | IR_dprintk(1, "Current protocol(s): 0x%llx\n", |
963 | (long long)type); | |
964 | ||
08aeb7c9 JW |
965 | ret = len; |
966 | ||
967 | out: | |
968 | mutex_unlock(&dev->lock); | |
969 | return ret; | |
bc2a6c57 MCC |
970 | } |
971 | ||
00942d1a JH |
972 | /** |
973 | * struct rc_filter_attribute - Device attribute relating to a filter type. | |
974 | * @attr: Device attribute. | |
975 | * @type: Filter type. | |
976 | * @mask: false for filter value, true for filter mask. | |
977 | */ | |
978 | struct rc_filter_attribute { | |
979 | struct device_attribute attr; | |
980 | enum rc_filter_type type; | |
981 | bool mask; | |
982 | }; | |
983 | #define to_rc_filter_attr(a) container_of(a, struct rc_filter_attribute, attr) | |
984 | ||
985 | #define RC_FILTER_ATTR(_name, _mode, _show, _store, _type, _mask) \ | |
986 | struct rc_filter_attribute dev_attr_##_name = { \ | |
987 | .attr = __ATTR(_name, _mode, _show, _store), \ | |
988 | .type = (_type), \ | |
989 | .mask = (_mask), \ | |
990 | } | |
991 | ||
992 | /** | |
993 | * show_filter() - shows the current scancode filter value or mask | |
994 | * @device: the device descriptor | |
995 | * @attr: the device attribute struct | |
996 | * @buf: a pointer to the output buffer | |
997 | * | |
998 | * This routine is a callback routine to read a scancode filter value or mask. | |
999 | * It is trigged by reading /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1000 | * It prints the current scancode filter value or mask of the appropriate filter | |
1001 | * type in hexadecimal into @buf and returns the size of the buffer. | |
1002 | * | |
1003 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1004 | * compared against input scancodes and non-matching scancodes are discarded. | |
1005 | * | |
1006 | * dev->lock is taken to guard against races between device registration, | |
1007 | * store_filter and show_filter. | |
1008 | */ | |
1009 | static ssize_t show_filter(struct device *device, | |
1010 | struct device_attribute *attr, | |
1011 | char *buf) | |
1012 | { | |
1013 | struct rc_dev *dev = to_rc_dev(device); | |
1014 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
1015 | u32 val; | |
1016 | ||
1017 | /* Device is being removed */ | |
1018 | if (!dev) | |
1019 | return -EINVAL; | |
1020 | ||
1021 | mutex_lock(&dev->lock); | |
1022 | if (!dev->s_filter) | |
1023 | val = 0; | |
1024 | else if (fattr->mask) | |
1025 | val = dev->scancode_filters[fattr->type].mask; | |
1026 | else | |
1027 | val = dev->scancode_filters[fattr->type].data; | |
1028 | mutex_unlock(&dev->lock); | |
1029 | ||
1030 | return sprintf(buf, "%#x\n", val); | |
1031 | } | |
1032 | ||
1033 | /** | |
1034 | * store_filter() - changes the scancode filter value | |
1035 | * @device: the device descriptor | |
1036 | * @attr: the device attribute struct | |
1037 | * @buf: a pointer to the input buffer | |
1038 | * @len: length of the input buffer | |
1039 | * | |
1040 | * This routine is for changing a scancode filter value or mask. | |
1041 | * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1042 | * Returns -EINVAL if an invalid filter value for the current protocol was | |
1043 | * specified or if scancode filtering is not supported by the driver, otherwise | |
1044 | * returns @len. | |
1045 | * | |
1046 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1047 | * compared against input scancodes and non-matching scancodes are discarded. | |
1048 | * | |
1049 | * dev->lock is taken to guard against races between device registration, | |
1050 | * store_filter and show_filter. | |
1051 | */ | |
1052 | static ssize_t store_filter(struct device *device, | |
1053 | struct device_attribute *attr, | |
1054 | const char *buf, | |
1055 | size_t count) | |
1056 | { | |
1057 | struct rc_dev *dev = to_rc_dev(device); | |
1058 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
1059 | struct rc_scancode_filter local_filter, *filter; | |
1060 | int ret; | |
1061 | unsigned long val; | |
1062 | ||
1063 | /* Device is being removed */ | |
1064 | if (!dev) | |
1065 | return -EINVAL; | |
1066 | ||
1067 | ret = kstrtoul(buf, 0, &val); | |
1068 | if (ret < 0) | |
1069 | return ret; | |
1070 | ||
1071 | /* Scancode filter not supported (but still accept 0) */ | |
1072 | if (!dev->s_filter) | |
1073 | return val ? -EINVAL : count; | |
1074 | ||
1075 | mutex_lock(&dev->lock); | |
1076 | ||
1077 | /* Tell the driver about the new filter */ | |
1078 | filter = &dev->scancode_filters[fattr->type]; | |
1079 | local_filter = *filter; | |
1080 | if (fattr->mask) | |
1081 | local_filter.mask = val; | |
1082 | else | |
1083 | local_filter.data = val; | |
1084 | ret = dev->s_filter(dev, fattr->type, &local_filter); | |
1085 | if (ret < 0) | |
1086 | goto unlock; | |
1087 | ||
1088 | /* Success, commit the new filter */ | |
1089 | *filter = local_filter; | |
1090 | ||
1091 | unlock: | |
1092 | mutex_unlock(&dev->lock); | |
1093 | return count; | |
1094 | } | |
1095 | ||
d8b4b582 DH |
1096 | static void rc_dev_release(struct device *device) |
1097 | { | |
d8b4b582 DH |
1098 | } |
1099 | ||
bc2a6c57 MCC |
1100 | #define ADD_HOTPLUG_VAR(fmt, val...) \ |
1101 | do { \ | |
1102 | int err = add_uevent_var(env, fmt, val); \ | |
1103 | if (err) \ | |
1104 | return err; \ | |
1105 | } while (0) | |
1106 | ||
1107 | static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) | |
1108 | { | |
d8b4b582 | 1109 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 | 1110 | |
b05681b9 MCC |
1111 | if (!dev || !dev->input_dev) |
1112 | return -ENODEV; | |
1113 | ||
b088ba65 MCC |
1114 | if (dev->rc_map.name) |
1115 | ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name); | |
d8b4b582 DH |
1116 | if (dev->driver_name) |
1117 | ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name); | |
bc2a6c57 MCC |
1118 | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * Static device attribute struct with the sysfs attributes for IR's | |
1124 | */ | |
1125 | static DEVICE_ATTR(protocols, S_IRUGO | S_IWUSR, | |
1126 | show_protocols, store_protocols); | |
00942d1a JH |
1127 | static RC_FILTER_ATTR(filter, S_IRUGO|S_IWUSR, |
1128 | show_filter, store_filter, RC_FILTER_NORMAL, false); | |
1129 | static RC_FILTER_ATTR(filter_mask, S_IRUGO|S_IWUSR, | |
1130 | show_filter, store_filter, RC_FILTER_NORMAL, true); | |
1131 | static RC_FILTER_ATTR(wakeup_filter, S_IRUGO|S_IWUSR, | |
1132 | show_filter, store_filter, RC_FILTER_WAKEUP, false); | |
1133 | static RC_FILTER_ATTR(wakeup_filter_mask, S_IRUGO|S_IWUSR, | |
1134 | show_filter, store_filter, RC_FILTER_WAKEUP, true); | |
bc2a6c57 MCC |
1135 | |
1136 | static struct attribute *rc_dev_attrs[] = { | |
1137 | &dev_attr_protocols.attr, | |
00942d1a JH |
1138 | &dev_attr_filter.attr.attr, |
1139 | &dev_attr_filter_mask.attr.attr, | |
1140 | &dev_attr_wakeup_filter.attr.attr, | |
1141 | &dev_attr_wakeup_filter_mask.attr.attr, | |
bc2a6c57 MCC |
1142 | NULL, |
1143 | }; | |
1144 | ||
1145 | static struct attribute_group rc_dev_attr_grp = { | |
1146 | .attrs = rc_dev_attrs, | |
1147 | }; | |
1148 | ||
1149 | static const struct attribute_group *rc_dev_attr_groups[] = { | |
1150 | &rc_dev_attr_grp, | |
1151 | NULL | |
1152 | }; | |
1153 | ||
1154 | static struct device_type rc_dev_type = { | |
1155 | .groups = rc_dev_attr_groups, | |
d8b4b582 | 1156 | .release = rc_dev_release, |
bc2a6c57 MCC |
1157 | .uevent = rc_dev_uevent, |
1158 | }; | |
1159 | ||
d8b4b582 | 1160 | struct rc_dev *rc_allocate_device(void) |
bc2a6c57 | 1161 | { |
d8b4b582 | 1162 | struct rc_dev *dev; |
bc2a6c57 | 1163 | |
d8b4b582 DH |
1164 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1165 | if (!dev) | |
1166 | return NULL; | |
1167 | ||
1168 | dev->input_dev = input_allocate_device(); | |
1169 | if (!dev->input_dev) { | |
1170 | kfree(dev); | |
1171 | return NULL; | |
1172 | } | |
1173 | ||
aebd636b DT |
1174 | dev->input_dev->getkeycode = ir_getkeycode; |
1175 | dev->input_dev->setkeycode = ir_setkeycode; | |
d8b4b582 DH |
1176 | input_set_drvdata(dev->input_dev, dev); |
1177 | ||
b088ba65 | 1178 | spin_lock_init(&dev->rc_map.lock); |
d8b4b582 | 1179 | spin_lock_init(&dev->keylock); |
08aeb7c9 | 1180 | mutex_init(&dev->lock); |
d8b4b582 | 1181 | setup_timer(&dev->timer_keyup, ir_timer_keyup, (unsigned long)dev); |
bc2a6c57 | 1182 | |
d8b4b582 | 1183 | dev->dev.type = &rc_dev_type; |
40fc5325 | 1184 | dev->dev.class = &rc_class; |
d8b4b582 DH |
1185 | device_initialize(&dev->dev); |
1186 | ||
1187 | __module_get(THIS_MODULE); | |
1188 | return dev; | |
1189 | } | |
1190 | EXPORT_SYMBOL_GPL(rc_allocate_device); | |
1191 | ||
1192 | void rc_free_device(struct rc_dev *dev) | |
bc2a6c57 | 1193 | { |
b05681b9 MCC |
1194 | if (!dev) |
1195 | return; | |
1196 | ||
1197 | if (dev->input_dev) | |
d8b4b582 | 1198 | input_free_device(dev->input_dev); |
b05681b9 MCC |
1199 | |
1200 | put_device(&dev->dev); | |
1201 | ||
1202 | kfree(dev); | |
1203 | module_put(THIS_MODULE); | |
d8b4b582 DH |
1204 | } |
1205 | EXPORT_SYMBOL_GPL(rc_free_device); | |
1206 | ||
1207 | int rc_register_device(struct rc_dev *dev) | |
1208 | { | |
5da6e984 | 1209 | static bool raw_init = false; /* raw decoders loaded? */ |
b088ba65 | 1210 | struct rc_map *rc_map; |
bc2a6c57 | 1211 | const char *path; |
587d1b06 | 1212 | int rc, devno; |
bc2a6c57 | 1213 | |
d8b4b582 DH |
1214 | if (!dev || !dev->map_name) |
1215 | return -EINVAL; | |
bc2a6c57 | 1216 | |
d100e659 | 1217 | rc_map = rc_map_get(dev->map_name); |
b088ba65 | 1218 | if (!rc_map) |
d100e659 | 1219 | rc_map = rc_map_get(RC_MAP_EMPTY); |
b088ba65 | 1220 | if (!rc_map || !rc_map->scan || rc_map->size == 0) |
d8b4b582 DH |
1221 | return -EINVAL; |
1222 | ||
1223 | set_bit(EV_KEY, dev->input_dev->evbit); | |
1224 | set_bit(EV_REP, dev->input_dev->evbit); | |
1225 | set_bit(EV_MSC, dev->input_dev->evbit); | |
1226 | set_bit(MSC_SCAN, dev->input_dev->mscbit); | |
1227 | if (dev->open) | |
1228 | dev->input_dev->open = ir_open; | |
1229 | if (dev->close) | |
1230 | dev->input_dev->close = ir_close; | |
1231 | ||
08aeb7c9 JW |
1232 | /* |
1233 | * Take the lock here, as the device sysfs node will appear | |
1234 | * when device_add() is called, which may trigger an ir-keytable udev | |
9719afae DH |
1235 | * rule, which will in turn call show_protocols and access |
1236 | * dev->enabled_protocols before it has been initialized. | |
08aeb7c9 JW |
1237 | */ |
1238 | mutex_lock(&dev->lock); | |
1239 | ||
587d1b06 MCC |
1240 | do { |
1241 | devno = find_first_zero_bit(ir_core_dev_number, | |
1242 | IRRCV_NUM_DEVICES); | |
1243 | /* No free device slots */ | |
1244 | if (devno >= IRRCV_NUM_DEVICES) | |
1245 | return -ENOMEM; | |
1246 | } while (test_and_set_bit(devno, ir_core_dev_number)); | |
1247 | ||
1248 | dev->devno = devno; | |
d8b4b582 DH |
1249 | dev_set_name(&dev->dev, "rc%ld", dev->devno); |
1250 | dev_set_drvdata(&dev->dev, dev); | |
1251 | rc = device_add(&dev->dev); | |
1252 | if (rc) | |
08aeb7c9 | 1253 | goto out_unlock; |
bc2a6c57 | 1254 | |
b088ba65 | 1255 | rc = ir_setkeytable(dev, rc_map); |
d8b4b582 DH |
1256 | if (rc) |
1257 | goto out_dev; | |
1258 | ||
1259 | dev->input_dev->dev.parent = &dev->dev; | |
1260 | memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id)); | |
1261 | dev->input_dev->phys = dev->input_phys; | |
1262 | dev->input_dev->name = dev->input_name; | |
8b2ff320 SK |
1263 | |
1264 | /* input_register_device can call ir_open, so unlock mutex here */ | |
1265 | mutex_unlock(&dev->lock); | |
1266 | ||
d8b4b582 | 1267 | rc = input_register_device(dev->input_dev); |
8b2ff320 SK |
1268 | |
1269 | mutex_lock(&dev->lock); | |
1270 | ||
d8b4b582 DH |
1271 | if (rc) |
1272 | goto out_table; | |
bc2a6c57 | 1273 | |
d8b4b582 | 1274 | /* |
25985edc | 1275 | * Default delay of 250ms is too short for some protocols, especially |
d8b4b582 DH |
1276 | * since the timeout is currently set to 250ms. Increase it to 500ms, |
1277 | * to avoid wrong repetition of the keycodes. Note that this must be | |
1278 | * set after the call to input_register_device(). | |
1279 | */ | |
1280 | dev->input_dev->rep[REP_DELAY] = 500; | |
1281 | ||
ca540c8b MCC |
1282 | /* |
1283 | * As a repeat event on protocols like RC-5 and NEC take as long as | |
1284 | * 110/114ms, using 33ms as a repeat period is not the right thing | |
1285 | * to do. | |
1286 | */ | |
1287 | dev->input_dev->rep[REP_PERIOD] = 125; | |
1288 | ||
d8b4b582 | 1289 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
bc2a6c57 | 1290 | printk(KERN_INFO "%s: %s as %s\n", |
d8b4b582 DH |
1291 | dev_name(&dev->dev), |
1292 | dev->input_name ? dev->input_name : "Unspecified device", | |
bc2a6c57 MCC |
1293 | path ? path : "N/A"); |
1294 | kfree(path); | |
1295 | ||
d8b4b582 | 1296 | if (dev->driver_type == RC_DRIVER_IR_RAW) { |
5da6e984 EG |
1297 | /* Load raw decoders, if they aren't already */ |
1298 | if (!raw_init) { | |
1299 | IR_dprintk(1, "Loading raw decoders\n"); | |
1300 | ir_raw_init(); | |
1301 | raw_init = true; | |
1302 | } | |
d8b4b582 DH |
1303 | rc = ir_raw_event_register(dev); |
1304 | if (rc < 0) | |
1305 | goto out_input; | |
1306 | } | |
1307 | ||
1308 | if (dev->change_protocol) { | |
c003ab1b DH |
1309 | u64 rc_type = (1 << rc_map->rc_type); |
1310 | rc = dev->change_protocol(dev, &rc_type); | |
d8b4b582 DH |
1311 | if (rc < 0) |
1312 | goto out_raw; | |
9719afae | 1313 | dev->enabled_protocols = rc_type; |
d8b4b582 DH |
1314 | } |
1315 | ||
0528f354 DC |
1316 | mutex_unlock(&dev->lock); |
1317 | ||
d8b4b582 DH |
1318 | IR_dprintk(1, "Registered rc%ld (driver: %s, remote: %s, mode %s)\n", |
1319 | dev->devno, | |
1320 | dev->driver_name ? dev->driver_name : "unknown", | |
b088ba65 | 1321 | rc_map->name ? rc_map->name : "unknown", |
d8b4b582 DH |
1322 | dev->driver_type == RC_DRIVER_IR_RAW ? "raw" : "cooked"); |
1323 | ||
bc2a6c57 | 1324 | return 0; |
d8b4b582 DH |
1325 | |
1326 | out_raw: | |
1327 | if (dev->driver_type == RC_DRIVER_IR_RAW) | |
1328 | ir_raw_event_unregister(dev); | |
1329 | out_input: | |
1330 | input_unregister_device(dev->input_dev); | |
1331 | dev->input_dev = NULL; | |
1332 | out_table: | |
b088ba65 | 1333 | ir_free_table(&dev->rc_map); |
d8b4b582 DH |
1334 | out_dev: |
1335 | device_del(&dev->dev); | |
08aeb7c9 JW |
1336 | out_unlock: |
1337 | mutex_unlock(&dev->lock); | |
587d1b06 | 1338 | clear_bit(dev->devno, ir_core_dev_number); |
d8b4b582 | 1339 | return rc; |
bc2a6c57 | 1340 | } |
d8b4b582 | 1341 | EXPORT_SYMBOL_GPL(rc_register_device); |
bc2a6c57 | 1342 | |
d8b4b582 | 1343 | void rc_unregister_device(struct rc_dev *dev) |
bc2a6c57 | 1344 | { |
d8b4b582 DH |
1345 | if (!dev) |
1346 | return; | |
bc2a6c57 | 1347 | |
d8b4b582 | 1348 | del_timer_sync(&dev->timer_keyup); |
bc2a6c57 | 1349 | |
587d1b06 MCC |
1350 | clear_bit(dev->devno, ir_core_dev_number); |
1351 | ||
d8b4b582 DH |
1352 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1353 | ir_raw_event_unregister(dev); | |
1354 | ||
b05681b9 MCC |
1355 | /* Freeing the table should also call the stop callback */ |
1356 | ir_free_table(&dev->rc_map); | |
1357 | IR_dprintk(1, "Freed keycode table\n"); | |
1358 | ||
d8b4b582 DH |
1359 | input_unregister_device(dev->input_dev); |
1360 | dev->input_dev = NULL; | |
1361 | ||
b05681b9 | 1362 | device_del(&dev->dev); |
d8b4b582 | 1363 | |
b05681b9 | 1364 | rc_free_device(dev); |
bc2a6c57 | 1365 | } |
b05681b9 | 1366 | |
d8b4b582 | 1367 | EXPORT_SYMBOL_GPL(rc_unregister_device); |
bc2a6c57 MCC |
1368 | |
1369 | /* | |
1370 | * Init/exit code for the module. Basically, creates/removes /sys/class/rc | |
1371 | */ | |
1372 | ||
6bda9644 | 1373 | static int __init rc_core_init(void) |
bc2a6c57 | 1374 | { |
40fc5325 | 1375 | int rc = class_register(&rc_class); |
bc2a6c57 | 1376 | if (rc) { |
6bda9644 | 1377 | printk(KERN_ERR "rc_core: unable to register rc class\n"); |
bc2a6c57 MCC |
1378 | return rc; |
1379 | } | |
1380 | ||
153a60bb | 1381 | led_trigger_register_simple("rc-feedback", &led_feedback); |
d100e659 | 1382 | rc_map_register(&empty_map); |
bc2a6c57 MCC |
1383 | |
1384 | return 0; | |
1385 | } | |
1386 | ||
6bda9644 | 1387 | static void __exit rc_core_exit(void) |
bc2a6c57 | 1388 | { |
40fc5325 | 1389 | class_unregister(&rc_class); |
153a60bb | 1390 | led_trigger_unregister_simple(led_feedback); |
d100e659 | 1391 | rc_map_unregister(&empty_map); |
bc2a6c57 MCC |
1392 | } |
1393 | ||
e76d4ce4 | 1394 | subsys_initcall(rc_core_init); |
6bda9644 | 1395 | module_exit(rc_core_exit); |
bc2a6c57 | 1396 | |
6bda9644 MCC |
1397 | int rc_core_debug; /* ir_debug level (0,1,2) */ |
1398 | EXPORT_SYMBOL_GPL(rc_core_debug); | |
1399 | module_param_named(debug, rc_core_debug, int, 0644); | |
446e4a64 MCC |
1400 | |
1401 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); | |
1402 | MODULE_LICENSE("GPL"); |