]>
Commit | Line | Data |
---|---|---|
829ba9fe | 1 | /* rc-main.c - Remote Controller core module |
ef53a115 | 2 | * |
37e59f87 | 3 | * Copyright (C) 2009-2010 by Mauro Carvalho Chehab |
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 | ||
d3d96820 MCC |
15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
16 | ||
6bda9644 | 17 | #include <media/rc-core.h> |
078600f5 | 18 | #include <linux/atomic.h> |
631493ec MCC |
19 | #include <linux/spinlock.h> |
20 | #include <linux/delay.h> | |
882ead32 | 21 | #include <linux/input.h> |
153a60bb | 22 | #include <linux/leds.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
fcb13097 | 24 | #include <linux/idr.h> |
bc2a6c57 | 25 | #include <linux/device.h> |
7a707b89 | 26 | #include <linux/module.h> |
f62de675 | 27 | #include "rc-core-priv.h" |
ef53a115 | 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 | |
fcb13097 | 32 | #define RC_DEV_MAX 256 |
f6fc5049 | 33 | |
a374fef4 DH |
34 | /* FIXME: IR_KEYPRESS_TIMEOUT should be protocol specific */ |
35 | #define IR_KEYPRESS_TIMEOUT 250 | |
36 | ||
4c7b355d | 37 | /* Used to keep track of known keymaps */ |
631493ec MCC |
38 | static LIST_HEAD(rc_map_list); |
39 | static DEFINE_SPINLOCK(rc_map_lock); | |
153a60bb | 40 | static struct led_trigger *led_feedback; |
631493ec | 41 | |
fcb13097 DH |
42 | /* Used to keep track of rc devices */ |
43 | static DEFINE_IDA(rc_ida); | |
44 | ||
d100e659 | 45 | static struct rc_map_list *seek_rc_map(const char *name) |
631493ec | 46 | { |
d100e659 | 47 | struct rc_map_list *map = NULL; |
631493ec MCC |
48 | |
49 | spin_lock(&rc_map_lock); | |
50 | list_for_each_entry(map, &rc_map_list, list) { | |
51 | if (!strcmp(name, map->map.name)) { | |
52 | spin_unlock(&rc_map_lock); | |
53 | return map; | |
54 | } | |
55 | } | |
56 | spin_unlock(&rc_map_lock); | |
57 | ||
58 | return NULL; | |
59 | } | |
60 | ||
d100e659 | 61 | struct rc_map *rc_map_get(const char *name) |
631493ec MCC |
62 | { |
63 | ||
d100e659 | 64 | struct rc_map_list *map; |
631493ec MCC |
65 | |
66 | map = seek_rc_map(name); | |
2ff56fad | 67 | #ifdef CONFIG_MODULES |
631493ec | 68 | if (!map) { |
8ea5488a | 69 | int rc = request_module("%s", name); |
631493ec | 70 | if (rc < 0) { |
d3d96820 | 71 | pr_err("Couldn't load IR keymap %s\n", name); |
631493ec MCC |
72 | return NULL; |
73 | } | |
74 | msleep(20); /* Give some time for IR to register */ | |
75 | ||
76 | map = seek_rc_map(name); | |
77 | } | |
78 | #endif | |
79 | if (!map) { | |
d3d96820 | 80 | pr_err("IR keymap %s not found\n", name); |
631493ec MCC |
81 | return NULL; |
82 | } | |
83 | ||
84 | printk(KERN_INFO "Registered IR keymap %s\n", map->map.name); | |
85 | ||
86 | return &map->map; | |
87 | } | |
d100e659 | 88 | EXPORT_SYMBOL_GPL(rc_map_get); |
631493ec | 89 | |
d100e659 | 90 | int rc_map_register(struct rc_map_list *map) |
631493ec MCC |
91 | { |
92 | spin_lock(&rc_map_lock); | |
93 | list_add_tail(&map->list, &rc_map_list); | |
94 | spin_unlock(&rc_map_lock); | |
95 | return 0; | |
96 | } | |
d100e659 | 97 | EXPORT_SYMBOL_GPL(rc_map_register); |
631493ec | 98 | |
d100e659 | 99 | void rc_map_unregister(struct rc_map_list *map) |
631493ec MCC |
100 | { |
101 | spin_lock(&rc_map_lock); | |
102 | list_del(&map->list); | |
103 | spin_unlock(&rc_map_lock); | |
104 | } | |
d100e659 | 105 | EXPORT_SYMBOL_GPL(rc_map_unregister); |
631493ec MCC |
106 | |
107 | ||
2f4f58d6 | 108 | static struct rc_map_table empty[] = { |
631493ec MCC |
109 | { 0x2a, KEY_COFFEE }, |
110 | }; | |
111 | ||
d100e659 | 112 | static struct rc_map_list empty_map = { |
631493ec MCC |
113 | .map = { |
114 | .scan = empty, | |
115 | .size = ARRAY_SIZE(empty), | |
52b66144 | 116 | .rc_type = RC_TYPE_UNKNOWN, /* Legacy IR type */ |
631493ec MCC |
117 | .name = RC_MAP_EMPTY, |
118 | } | |
119 | }; | |
120 | ||
9f470095 DT |
121 | /** |
122 | * ir_create_table() - initializes a scancode table | |
b088ba65 | 123 | * @rc_map: the rc_map to initialize |
9f470095 | 124 | * @name: name to assign to the table |
52b66144 | 125 | * @rc_type: ir type to assign to the new table |
9f470095 DT |
126 | * @size: initial size of the table |
127 | * @return: zero on success or a negative error code | |
128 | * | |
b088ba65 | 129 | * This routine will initialize the rc_map and will allocate |
d8b4b582 | 130 | * memory to hold at least the specified number of elements. |
9f470095 | 131 | */ |
b088ba65 | 132 | static int ir_create_table(struct rc_map *rc_map, |
52b66144 | 133 | const char *name, u64 rc_type, size_t size) |
9f470095 | 134 | { |
d54fc3bb HV |
135 | rc_map->name = kstrdup(name, GFP_KERNEL); |
136 | if (!rc_map->name) | |
137 | return -ENOMEM; | |
b088ba65 | 138 | rc_map->rc_type = rc_type; |
2f4f58d6 MCC |
139 | rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table)); |
140 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); | |
b088ba65 | 141 | rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL); |
d54fc3bb HV |
142 | if (!rc_map->scan) { |
143 | kfree(rc_map->name); | |
144 | rc_map->name = NULL; | |
9f470095 | 145 | return -ENOMEM; |
d54fc3bb | 146 | } |
9f470095 DT |
147 | |
148 | IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", | |
b088ba65 | 149 | rc_map->size, rc_map->alloc); |
9f470095 DT |
150 | return 0; |
151 | } | |
152 | ||
153 | /** | |
154 | * ir_free_table() - frees memory allocated by a scancode table | |
b088ba65 | 155 | * @rc_map: the table whose mappings need to be freed |
9f470095 DT |
156 | * |
157 | * This routine will free memory alloctaed for key mappings used by given | |
158 | * scancode table. | |
159 | */ | |
b088ba65 | 160 | static void ir_free_table(struct rc_map *rc_map) |
9f470095 | 161 | { |
b088ba65 | 162 | rc_map->size = 0; |
d54fc3bb | 163 | kfree(rc_map->name); |
c183d358 | 164 | rc_map->name = NULL; |
b088ba65 MCC |
165 | kfree(rc_map->scan); |
166 | rc_map->scan = NULL; | |
9f470095 DT |
167 | } |
168 | ||
7fee03e4 | 169 | /** |
b3074c0a | 170 | * ir_resize_table() - resizes a scancode table if necessary |
b088ba65 | 171 | * @rc_map: the rc_map to resize |
9f470095 | 172 | * @gfp_flags: gfp flags to use when allocating memory |
b3074c0a | 173 | * @return: zero on success or a negative error code |
7fee03e4 | 174 | * |
b088ba65 | 175 | * This routine will shrink the rc_map if it has lots of |
b3074c0a | 176 | * unused entries and grow it if it is full. |
7fee03e4 | 177 | */ |
b088ba65 | 178 | static int ir_resize_table(struct rc_map *rc_map, gfp_t gfp_flags) |
7fee03e4 | 179 | { |
b088ba65 | 180 | unsigned int oldalloc = rc_map->alloc; |
b3074c0a | 181 | unsigned int newalloc = oldalloc; |
2f4f58d6 MCC |
182 | struct rc_map_table *oldscan = rc_map->scan; |
183 | struct rc_map_table *newscan; | |
b3074c0a | 184 | |
b088ba65 | 185 | if (rc_map->size == rc_map->len) { |
b3074c0a | 186 | /* All entries in use -> grow keytable */ |
b088ba65 | 187 | if (rc_map->alloc >= IR_TAB_MAX_SIZE) |
b3074c0a | 188 | return -ENOMEM; |
7fee03e4 | 189 | |
b3074c0a DH |
190 | newalloc *= 2; |
191 | IR_dprintk(1, "Growing table to %u bytes\n", newalloc); | |
192 | } | |
7fee03e4 | 193 | |
b088ba65 | 194 | if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) { |
b3074c0a DH |
195 | /* Less than 1/3 of entries in use -> shrink keytable */ |
196 | newalloc /= 2; | |
197 | IR_dprintk(1, "Shrinking table to %u bytes\n", newalloc); | |
198 | } | |
7fee03e4 | 199 | |
b3074c0a DH |
200 | if (newalloc == oldalloc) |
201 | return 0; | |
7fee03e4 | 202 | |
9f470095 | 203 | newscan = kmalloc(newalloc, gfp_flags); |
b3074c0a DH |
204 | if (!newscan) { |
205 | IR_dprintk(1, "Failed to kmalloc %u bytes\n", newalloc); | |
206 | return -ENOMEM; | |
207 | } | |
7fee03e4 | 208 | |
2f4f58d6 | 209 | memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table)); |
b088ba65 MCC |
210 | rc_map->scan = newscan; |
211 | rc_map->alloc = newalloc; | |
2f4f58d6 | 212 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); |
b3074c0a DH |
213 | kfree(oldscan); |
214 | return 0; | |
7fee03e4 MCC |
215 | } |
216 | ||
f6fc5049 | 217 | /** |
9f470095 | 218 | * ir_update_mapping() - set a keycode in the scancode->keycode table |
d8b4b582 | 219 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 220 | * @rc_map: scancode table to be adjusted |
9f470095 DT |
221 | * @index: index of the mapping that needs to be updated |
222 | * @keycode: the desired keycode | |
223 | * @return: previous keycode assigned to the mapping | |
224 | * | |
d8b4b582 | 225 | * This routine is used to update scancode->keycode mapping at given |
9f470095 DT |
226 | * position. |
227 | */ | |
d8b4b582 | 228 | static unsigned int ir_update_mapping(struct rc_dev *dev, |
b088ba65 | 229 | struct rc_map *rc_map, |
9f470095 DT |
230 | unsigned int index, |
231 | unsigned int new_keycode) | |
232 | { | |
b088ba65 | 233 | int old_keycode = rc_map->scan[index].keycode; |
9f470095 DT |
234 | int i; |
235 | ||
236 | /* Did the user wish to remove the mapping? */ | |
237 | if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) { | |
238 | IR_dprintk(1, "#%d: Deleting scan 0x%04x\n", | |
b088ba65 MCC |
239 | index, rc_map->scan[index].scancode); |
240 | rc_map->len--; | |
241 | memmove(&rc_map->scan[index], &rc_map->scan[index+ 1], | |
2f4f58d6 | 242 | (rc_map->len - index) * sizeof(struct rc_map_table)); |
9f470095 DT |
243 | } else { |
244 | IR_dprintk(1, "#%d: %s scan 0x%04x with key 0x%04x\n", | |
245 | index, | |
246 | old_keycode == KEY_RESERVED ? "New" : "Replacing", | |
b088ba65 MCC |
247 | rc_map->scan[index].scancode, new_keycode); |
248 | rc_map->scan[index].keycode = new_keycode; | |
d8b4b582 | 249 | __set_bit(new_keycode, dev->input_dev->keybit); |
9f470095 DT |
250 | } |
251 | ||
252 | if (old_keycode != KEY_RESERVED) { | |
253 | /* A previous mapping was updated... */ | |
d8b4b582 | 254 | __clear_bit(old_keycode, dev->input_dev->keybit); |
9f470095 | 255 | /* ... but another scancode might use the same keycode */ |
b088ba65 MCC |
256 | for (i = 0; i < rc_map->len; i++) { |
257 | if (rc_map->scan[i].keycode == old_keycode) { | |
d8b4b582 | 258 | __set_bit(old_keycode, dev->input_dev->keybit); |
9f470095 DT |
259 | break; |
260 | } | |
261 | } | |
262 | ||
263 | /* Possibly shrink the keytable, failure is not a problem */ | |
b088ba65 | 264 | ir_resize_table(rc_map, GFP_ATOMIC); |
9f470095 DT |
265 | } |
266 | ||
267 | return old_keycode; | |
268 | } | |
269 | ||
270 | /** | |
4c7b355d | 271 | * ir_establish_scancode() - set a keycode in the scancode->keycode table |
d8b4b582 | 272 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 273 | * @rc_map: scancode table to be searched |
9f470095 DT |
274 | * @scancode: the desired scancode |
275 | * @resize: controls whether we allowed to resize the table to | |
25985edc | 276 | * accommodate not yet present scancodes |
9f470095 DT |
277 | * @return: index of the mapping containing scancode in question |
278 | * or -1U in case of failure. | |
f6fc5049 | 279 | * |
b088ba65 | 280 | * This routine is used to locate given scancode in rc_map. |
9f470095 DT |
281 | * If scancode is not yet present the routine will allocate a new slot |
282 | * for it. | |
f6fc5049 | 283 | */ |
d8b4b582 | 284 | static unsigned int ir_establish_scancode(struct rc_dev *dev, |
b088ba65 | 285 | struct rc_map *rc_map, |
9f470095 DT |
286 | unsigned int scancode, |
287 | bool resize) | |
f6fc5049 | 288 | { |
b3074c0a | 289 | unsigned int i; |
9dfe4e83 MCC |
290 | |
291 | /* | |
292 | * Unfortunately, some hardware-based IR decoders don't provide | |
293 | * all bits for the complete IR code. In general, they provide only | |
294 | * the command part of the IR code. Yet, as it is possible to replace | |
295 | * the provided IR with another one, it is needed to allow loading | |
d8b4b582 DH |
296 | * IR tables from other remotes. So, we support specifying a mask to |
297 | * indicate the valid bits of the scancodes. | |
9dfe4e83 | 298 | */ |
9d2f1d3c DH |
299 | if (dev->scancode_mask) |
300 | scancode &= dev->scancode_mask; | |
b3074c0a DH |
301 | |
302 | /* First check if we already have a mapping for this ir command */ | |
b088ba65 MCC |
303 | for (i = 0; i < rc_map->len; i++) { |
304 | if (rc_map->scan[i].scancode == scancode) | |
9f470095 DT |
305 | return i; |
306 | ||
b3074c0a | 307 | /* Keytable is sorted from lowest to highest scancode */ |
b088ba65 | 308 | if (rc_map->scan[i].scancode >= scancode) |
b3074c0a | 309 | break; |
b3074c0a | 310 | } |
f6fc5049 | 311 | |
9f470095 | 312 | /* No previous mapping found, we might need to grow the table */ |
b088ba65 MCC |
313 | if (rc_map->size == rc_map->len) { |
314 | if (!resize || ir_resize_table(rc_map, GFP_ATOMIC)) | |
9f470095 DT |
315 | return -1U; |
316 | } | |
35438946 | 317 | |
9f470095 | 318 | /* i is the proper index to insert our new keycode */ |
b088ba65 MCC |
319 | if (i < rc_map->len) |
320 | memmove(&rc_map->scan[i + 1], &rc_map->scan[i], | |
2f4f58d6 | 321 | (rc_map->len - i) * sizeof(struct rc_map_table)); |
b088ba65 MCC |
322 | rc_map->scan[i].scancode = scancode; |
323 | rc_map->scan[i].keycode = KEY_RESERVED; | |
324 | rc_map->len++; | |
f6fc5049 | 325 | |
9f470095 | 326 | return i; |
f6fc5049 MCC |
327 | } |
328 | ||
ef53a115 | 329 | /** |
b3074c0a | 330 | * ir_setkeycode() - set a keycode in the scancode->keycode table |
d8b4b582 | 331 | * @idev: the struct input_dev device descriptor |
ef53a115 | 332 | * @scancode: the desired scancode |
b3074c0a DH |
333 | * @keycode: result |
334 | * @return: -EINVAL if the keycode could not be inserted, otherwise zero. | |
ef53a115 | 335 | * |
b3074c0a | 336 | * This routine is used to handle evdev EVIOCSKEY ioctl. |
ef53a115 | 337 | */ |
d8b4b582 | 338 | static int ir_setkeycode(struct input_dev *idev, |
9f470095 DT |
339 | const struct input_keymap_entry *ke, |
340 | unsigned int *old_keycode) | |
ef53a115 | 341 | { |
d8b4b582 | 342 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 343 | struct rc_map *rc_map = &rdev->rc_map; |
9f470095 DT |
344 | unsigned int index; |
345 | unsigned int scancode; | |
dea8a39f | 346 | int retval = 0; |
9f470095 | 347 | unsigned long flags; |
ef53a115 | 348 | |
b088ba65 | 349 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
350 | |
351 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
352 | index = ke->index; | |
b088ba65 | 353 | if (index >= rc_map->len) { |
9f470095 DT |
354 | retval = -EINVAL; |
355 | goto out; | |
356 | } | |
357 | } else { | |
358 | retval = input_scancode_to_scalar(ke, &scancode); | |
359 | if (retval) | |
360 | goto out; | |
361 | ||
b088ba65 MCC |
362 | index = ir_establish_scancode(rdev, rc_map, scancode, true); |
363 | if (index >= rc_map->len) { | |
9f470095 DT |
364 | retval = -ENOMEM; |
365 | goto out; | |
366 | } | |
367 | } | |
368 | ||
b088ba65 | 369 | *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode); |
9f470095 DT |
370 | |
371 | out: | |
b088ba65 | 372 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 373 | return retval; |
e97f4677 MCC |
374 | } |
375 | ||
376 | /** | |
b3074c0a | 377 | * ir_setkeytable() - sets several entries in the scancode->keycode table |
d8b4b582 | 378 | * @dev: the struct rc_dev device descriptor |
b088ba65 MCC |
379 | * @to: the struct rc_map to copy entries to |
380 | * @from: the struct rc_map to copy entries from | |
9f470095 | 381 | * @return: -ENOMEM if all keycodes could not be inserted, otherwise zero. |
e97f4677 | 382 | * |
b3074c0a | 383 | * This routine is used to handle table initialization. |
e97f4677 | 384 | */ |
d8b4b582 | 385 | static int ir_setkeytable(struct rc_dev *dev, |
b088ba65 | 386 | const struct rc_map *from) |
e97f4677 | 387 | { |
b088ba65 | 388 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
389 | unsigned int i, index; |
390 | int rc; | |
391 | ||
b088ba65 | 392 | rc = ir_create_table(rc_map, from->name, |
52b66144 | 393 | from->rc_type, from->size); |
9f470095 DT |
394 | if (rc) |
395 | return rc; | |
396 | ||
397 | IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", | |
b088ba65 | 398 | rc_map->size, rc_map->alloc); |
e97f4677 | 399 | |
b3074c0a | 400 | for (i = 0; i < from->size; i++) { |
b088ba65 | 401 | index = ir_establish_scancode(dev, rc_map, |
9f470095 | 402 | from->scan[i].scancode, false); |
b088ba65 | 403 | if (index >= rc_map->len) { |
9f470095 | 404 | rc = -ENOMEM; |
b3074c0a | 405 | break; |
9f470095 DT |
406 | } |
407 | ||
b088ba65 | 408 | ir_update_mapping(dev, rc_map, index, |
9f470095 | 409 | from->scan[i].keycode); |
e97f4677 | 410 | } |
9f470095 DT |
411 | |
412 | if (rc) | |
b088ba65 | 413 | ir_free_table(rc_map); |
9f470095 | 414 | |
b3074c0a | 415 | return rc; |
ef53a115 MCC |
416 | } |
417 | ||
9f470095 DT |
418 | /** |
419 | * ir_lookup_by_scancode() - locate mapping by scancode | |
b088ba65 | 420 | * @rc_map: the struct rc_map to search |
9f470095 DT |
421 | * @scancode: scancode to look for in the table |
422 | * @return: index in the table, -1U if not found | |
423 | * | |
424 | * This routine performs binary search in RC keykeymap table for | |
425 | * given scancode. | |
426 | */ | |
b088ba65 | 427 | static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map, |
9f470095 DT |
428 | unsigned int scancode) |
429 | { | |
0d07025e | 430 | int start = 0; |
b088ba65 | 431 | int end = rc_map->len - 1; |
0d07025e | 432 | int mid; |
9f470095 DT |
433 | |
434 | while (start <= end) { | |
435 | mid = (start + end) / 2; | |
b088ba65 | 436 | if (rc_map->scan[mid].scancode < scancode) |
9f470095 | 437 | start = mid + 1; |
b088ba65 | 438 | else if (rc_map->scan[mid].scancode > scancode) |
9f470095 DT |
439 | end = mid - 1; |
440 | else | |
441 | return mid; | |
442 | } | |
443 | ||
444 | return -1U; | |
445 | } | |
446 | ||
ef53a115 | 447 | /** |
b3074c0a | 448 | * ir_getkeycode() - get a keycode from the scancode->keycode table |
d8b4b582 | 449 | * @idev: the struct input_dev device descriptor |
ef53a115 | 450 | * @scancode: the desired scancode |
b3074c0a DH |
451 | * @keycode: used to return the keycode, if found, or KEY_RESERVED |
452 | * @return: always returns zero. | |
ef53a115 | 453 | * |
b3074c0a | 454 | * This routine is used to handle evdev EVIOCGKEY ioctl. |
ef53a115 | 455 | */ |
d8b4b582 | 456 | static int ir_getkeycode(struct input_dev *idev, |
9f470095 | 457 | struct input_keymap_entry *ke) |
ef53a115 | 458 | { |
d8b4b582 | 459 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 460 | struct rc_map *rc_map = &rdev->rc_map; |
2f4f58d6 | 461 | struct rc_map_table *entry; |
9f470095 DT |
462 | unsigned long flags; |
463 | unsigned int index; | |
464 | unsigned int scancode; | |
465 | int retval; | |
ef53a115 | 466 | |
b088ba65 | 467 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
468 | |
469 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
470 | index = ke->index; | |
471 | } else { | |
472 | retval = input_scancode_to_scalar(ke, &scancode); | |
473 | if (retval) | |
474 | goto out; | |
475 | ||
b088ba65 | 476 | index = ir_lookup_by_scancode(rc_map, scancode); |
9f470095 DT |
477 | } |
478 | ||
54e74b87 DT |
479 | if (index < rc_map->len) { |
480 | entry = &rc_map->scan[index]; | |
481 | ||
482 | ke->index = index; | |
483 | ke->keycode = entry->keycode; | |
484 | ke->len = sizeof(entry->scancode); | |
485 | memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode)); | |
486 | ||
487 | } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) { | |
488 | /* | |
489 | * We do not really know the valid range of scancodes | |
490 | * so let's respond with KEY_RESERVED to anything we | |
491 | * do not have mapping for [yet]. | |
492 | */ | |
493 | ke->index = index; | |
494 | ke->keycode = KEY_RESERVED; | |
495 | } else { | |
9f470095 DT |
496 | retval = -EINVAL; |
497 | goto out; | |
e97f4677 MCC |
498 | } |
499 | ||
47c5ba53 DT |
500 | retval = 0; |
501 | ||
9f470095 | 502 | out: |
b088ba65 | 503 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 504 | return retval; |
ef53a115 MCC |
505 | } |
506 | ||
507 | /** | |
ca86674b | 508 | * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode |
d8b4b582 DH |
509 | * @dev: the struct rc_dev descriptor of the device |
510 | * @scancode: the scancode to look for | |
511 | * @return: the corresponding keycode, or KEY_RESERVED | |
ef53a115 | 512 | * |
d8b4b582 DH |
513 | * This routine is used by drivers which need to convert a scancode to a |
514 | * keycode. Normally it should not be used since drivers should have no | |
515 | * interest in keycodes. | |
ef53a115 | 516 | */ |
ca86674b | 517 | u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode) |
ef53a115 | 518 | { |
b088ba65 | 519 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
520 | unsigned int keycode; |
521 | unsigned int index; | |
522 | unsigned long flags; | |
523 | ||
b088ba65 | 524 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 | 525 | |
b088ba65 MCC |
526 | index = ir_lookup_by_scancode(rc_map, scancode); |
527 | keycode = index < rc_map->len ? | |
528 | rc_map->scan[index].keycode : KEY_RESERVED; | |
9f470095 | 529 | |
b088ba65 | 530 | spin_unlock_irqrestore(&rc_map->lock, flags); |
ef53a115 | 531 | |
35438946 MCC |
532 | if (keycode != KEY_RESERVED) |
533 | IR_dprintk(1, "%s: scancode 0x%04x keycode 0x%02x\n", | |
d8b4b582 | 534 | dev->input_name, scancode, keycode); |
9f470095 | 535 | |
b3074c0a | 536 | return keycode; |
ef53a115 | 537 | } |
ca86674b | 538 | EXPORT_SYMBOL_GPL(rc_g_keycode_from_table); |
ef53a115 | 539 | |
6660de56 | 540 | /** |
62c65031 | 541 | * ir_do_keyup() - internal function to signal the release of a keypress |
d8b4b582 | 542 | * @dev: the struct rc_dev descriptor of the device |
98c32bcd | 543 | * @sync: whether or not to call input_sync |
6660de56 | 544 | * |
62c65031 DH |
545 | * This function is used internally to release a keypress, it must be |
546 | * called with keylock held. | |
a374fef4 | 547 | */ |
98c32bcd | 548 | static void ir_do_keyup(struct rc_dev *dev, bool sync) |
a374fef4 | 549 | { |
d8b4b582 | 550 | if (!dev->keypressed) |
a374fef4 DH |
551 | return; |
552 | ||
d8b4b582 DH |
553 | IR_dprintk(1, "keyup key 0x%04x\n", dev->last_keycode); |
554 | input_report_key(dev->input_dev, dev->last_keycode, 0); | |
153a60bb | 555 | led_trigger_event(led_feedback, LED_OFF); |
98c32bcd JW |
556 | if (sync) |
557 | input_sync(dev->input_dev); | |
d8b4b582 | 558 | dev->keypressed = false; |
a374fef4 | 559 | } |
62c65031 DH |
560 | |
561 | /** | |
ca86674b | 562 | * rc_keyup() - signals the release of a keypress |
d8b4b582 | 563 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
564 | * |
565 | * This routine is used to signal that a key has been released on the | |
566 | * remote control. | |
567 | */ | |
ca86674b | 568 | void rc_keyup(struct rc_dev *dev) |
62c65031 DH |
569 | { |
570 | unsigned long flags; | |
62c65031 | 571 | |
d8b4b582 | 572 | spin_lock_irqsave(&dev->keylock, flags); |
98c32bcd | 573 | ir_do_keyup(dev, true); |
d8b4b582 | 574 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 575 | } |
ca86674b | 576 | EXPORT_SYMBOL_GPL(rc_keyup); |
a374fef4 DH |
577 | |
578 | /** | |
579 | * ir_timer_keyup() - generates a keyup event after a timeout | |
d8b4b582 | 580 | * @cookie: a pointer to the struct rc_dev for the device |
a374fef4 DH |
581 | * |
582 | * This routine will generate a keyup event some time after a keydown event | |
583 | * is generated when no further activity has been detected. | |
6660de56 | 584 | */ |
a374fef4 | 585 | static void ir_timer_keyup(unsigned long cookie) |
6660de56 | 586 | { |
d8b4b582 | 587 | struct rc_dev *dev = (struct rc_dev *)cookie; |
a374fef4 DH |
588 | unsigned long flags; |
589 | ||
590 | /* | |
591 | * ir->keyup_jiffies is used to prevent a race condition if a | |
592 | * hardware interrupt occurs at this point and the keyup timer | |
593 | * event is moved further into the future as a result. | |
594 | * | |
595 | * The timer will then be reactivated and this function called | |
596 | * again in the future. We need to exit gracefully in that case | |
597 | * to allow the input subsystem to do its auto-repeat magic or | |
598 | * a keyup event might follow immediately after the keydown. | |
599 | */ | |
d8b4b582 DH |
600 | spin_lock_irqsave(&dev->keylock, flags); |
601 | if (time_is_before_eq_jiffies(dev->keyup_jiffies)) | |
98c32bcd | 602 | ir_do_keyup(dev, true); |
d8b4b582 | 603 | spin_unlock_irqrestore(&dev->keylock, flags); |
a374fef4 DH |
604 | } |
605 | ||
606 | /** | |
ca86674b | 607 | * rc_repeat() - signals that a key is still pressed |
d8b4b582 | 608 | * @dev: the struct rc_dev descriptor of the device |
a374fef4 DH |
609 | * |
610 | * This routine is used by IR decoders when a repeat message which does | |
611 | * not include the necessary bits to reproduce the scancode has been | |
612 | * received. | |
613 | */ | |
ca86674b | 614 | void rc_repeat(struct rc_dev *dev) |
a374fef4 DH |
615 | { |
616 | unsigned long flags; | |
6660de56 | 617 | |
d8b4b582 | 618 | spin_lock_irqsave(&dev->keylock, flags); |
a374fef4 | 619 | |
d8b4b582 | 620 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode); |
98c32bcd | 621 | input_sync(dev->input_dev); |
ed4d3876 | 622 | |
d8b4b582 | 623 | if (!dev->keypressed) |
a374fef4 | 624 | goto out; |
6660de56 | 625 | |
d8b4b582 DH |
626 | dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); |
627 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
a374fef4 DH |
628 | |
629 | out: | |
d8b4b582 | 630 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 631 | } |
ca86674b | 632 | EXPORT_SYMBOL_GPL(rc_repeat); |
6660de56 MCC |
633 | |
634 | /** | |
62c65031 | 635 | * ir_do_keydown() - internal function to process a keypress |
d8b4b582 | 636 | * @dev: the struct rc_dev descriptor of the device |
120703f9 | 637 | * @protocol: the protocol of the keypress |
62c65031 DH |
638 | * @scancode: the scancode of the keypress |
639 | * @keycode: the keycode of the keypress | |
640 | * @toggle: the toggle value of the keypress | |
6660de56 | 641 | * |
62c65031 DH |
642 | * This function is used internally to register a keypress, it must be |
643 | * called with keylock held. | |
6660de56 | 644 | */ |
120703f9 DH |
645 | static void ir_do_keydown(struct rc_dev *dev, enum rc_type protocol, |
646 | u32 scancode, u32 keycode, u8 toggle) | |
6660de56 | 647 | { |
99b0f3c9 | 648 | bool new_event = (!dev->keypressed || |
120703f9 | 649 | dev->last_protocol != protocol || |
99b0f3c9 | 650 | dev->last_scancode != scancode || |
120703f9 | 651 | dev->last_toggle != toggle); |
6660de56 | 652 | |
98c32bcd JW |
653 | if (new_event && dev->keypressed) |
654 | ir_do_keyup(dev, false); | |
6660de56 | 655 | |
98c32bcd | 656 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode); |
a374fef4 | 657 | |
98c32bcd JW |
658 | if (new_event && keycode != KEY_RESERVED) { |
659 | /* Register a keypress */ | |
660 | dev->keypressed = true; | |
120703f9 | 661 | dev->last_protocol = protocol; |
98c32bcd JW |
662 | dev->last_scancode = scancode; |
663 | dev->last_toggle = toggle; | |
664 | dev->last_keycode = keycode; | |
665 | ||
25ec587c | 666 | IR_dprintk(1, "%s: key down event, key 0x%04x, protocol 0x%04x, scancode 0x%08x\n", |
120703f9 | 667 | dev->input_name, keycode, protocol, scancode); |
98c32bcd | 668 | input_report_key(dev->input_dev, keycode, 1); |
70a2f912 JH |
669 | |
670 | led_trigger_event(led_feedback, LED_FULL); | |
98c32bcd | 671 | } |
ed4d3876 | 672 | |
d8b4b582 | 673 | input_sync(dev->input_dev); |
62c65031 | 674 | } |
6660de56 | 675 | |
62c65031 | 676 | /** |
ca86674b | 677 | * rc_keydown() - generates input event for a key press |
d8b4b582 | 678 | * @dev: the struct rc_dev descriptor of the device |
120703f9 DH |
679 | * @protocol: the protocol for the keypress |
680 | * @scancode: the scancode for the keypress | |
62c65031 DH |
681 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't |
682 | * support toggle values, this should be set to zero) | |
683 | * | |
d8b4b582 DH |
684 | * This routine is used to signal that a key has been pressed on the |
685 | * remote control. | |
62c65031 | 686 | */ |
120703f9 | 687 | void rc_keydown(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle) |
62c65031 DH |
688 | { |
689 | unsigned long flags; | |
ca86674b | 690 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 691 | |
d8b4b582 | 692 | spin_lock_irqsave(&dev->keylock, flags); |
120703f9 | 693 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); |
62c65031 | 694 | |
d8b4b582 DH |
695 | if (dev->keypressed) { |
696 | dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); | |
697 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
62c65031 | 698 | } |
d8b4b582 | 699 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 700 | } |
ca86674b | 701 | EXPORT_SYMBOL_GPL(rc_keydown); |
6660de56 | 702 | |
62c65031 | 703 | /** |
ca86674b | 704 | * rc_keydown_notimeout() - generates input event for a key press without |
62c65031 | 705 | * an automatic keyup event at a later time |
d8b4b582 | 706 | * @dev: the struct rc_dev descriptor of the device |
120703f9 DH |
707 | * @protocol: the protocol for the keypress |
708 | * @scancode: the scancode for the keypress | |
62c65031 DH |
709 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't |
710 | * support toggle values, this should be set to zero) | |
711 | * | |
d8b4b582 | 712 | * This routine is used to signal that a key has been pressed on the |
ca86674b | 713 | * remote control. The driver must manually call rc_keyup() at a later stage. |
62c65031 | 714 | */ |
120703f9 DH |
715 | void rc_keydown_notimeout(struct rc_dev *dev, enum rc_type protocol, |
716 | u32 scancode, u8 toggle) | |
62c65031 DH |
717 | { |
718 | unsigned long flags; | |
ca86674b | 719 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 720 | |
d8b4b582 | 721 | spin_lock_irqsave(&dev->keylock, flags); |
120703f9 | 722 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); |
d8b4b582 | 723 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 724 | } |
ca86674b | 725 | EXPORT_SYMBOL_GPL(rc_keydown_notimeout); |
62c65031 | 726 | |
b590c0bf SY |
727 | /** |
728 | * rc_validate_filter() - checks that the scancode and mask are valid and | |
729 | * provides sensible defaults | |
f423ccc1 | 730 | * @dev: the struct rc_dev descriptor of the device |
b590c0bf SY |
731 | * @filter: the scancode and mask |
732 | * @return: 0 or -EINVAL if the filter is not valid | |
733 | */ | |
f423ccc1 | 734 | static int rc_validate_filter(struct rc_dev *dev, |
b590c0bf SY |
735 | struct rc_scancode_filter *filter) |
736 | { | |
737 | static u32 masks[] = { | |
738 | [RC_TYPE_RC5] = 0x1f7f, | |
739 | [RC_TYPE_RC5X_20] = 0x1f7f3f, | |
740 | [RC_TYPE_RC5_SZ] = 0x2fff, | |
741 | [RC_TYPE_SONY12] = 0x1f007f, | |
742 | [RC_TYPE_SONY15] = 0xff007f, | |
743 | [RC_TYPE_SONY20] = 0x1fff7f, | |
744 | [RC_TYPE_JVC] = 0xffff, | |
745 | [RC_TYPE_NEC] = 0xffff, | |
746 | [RC_TYPE_NECX] = 0xffffff, | |
747 | [RC_TYPE_NEC32] = 0xffffffff, | |
748 | [RC_TYPE_SANYO] = 0x1fffff, | |
749 | [RC_TYPE_RC6_0] = 0xffff, | |
750 | [RC_TYPE_RC6_6A_20] = 0xfffff, | |
751 | [RC_TYPE_RC6_6A_24] = 0xffffff, | |
752 | [RC_TYPE_RC6_6A_32] = 0xffffffff, | |
753 | [RC_TYPE_RC6_MCE] = 0xffff7fff, | |
754 | [RC_TYPE_SHARP] = 0x1fff, | |
755 | }; | |
756 | u32 s = filter->data; | |
f423ccc1 | 757 | enum rc_type protocol = dev->wakeup_protocol; |
b590c0bf SY |
758 | |
759 | switch (protocol) { | |
760 | case RC_TYPE_NECX: | |
761 | if ((((s >> 16) ^ ~(s >> 8)) & 0xff) == 0) | |
762 | return -EINVAL; | |
763 | break; | |
764 | case RC_TYPE_NEC32: | |
765 | if ((((s >> 24) ^ ~(s >> 16)) & 0xff) == 0) | |
766 | return -EINVAL; | |
767 | break; | |
768 | case RC_TYPE_RC6_MCE: | |
769 | if ((s & 0xffff0000) != 0x800f0000) | |
770 | return -EINVAL; | |
771 | break; | |
772 | case RC_TYPE_RC6_6A_32: | |
773 | if ((s & 0xffff0000) == 0x800f0000) | |
774 | return -EINVAL; | |
775 | break; | |
776 | default: | |
777 | break; | |
778 | } | |
779 | ||
780 | filter->data &= masks[protocol]; | |
781 | filter->mask &= masks[protocol]; | |
782 | ||
f423ccc1 JH |
783 | /* |
784 | * If we have to raw encode the IR for wakeup, we cannot have a mask | |
785 | */ | |
786 | if (dev->encode_wakeup && | |
787 | filter->mask != 0 && filter->mask != masks[protocol]) | |
788 | return -EINVAL; | |
789 | ||
b590c0bf SY |
790 | return 0; |
791 | } | |
792 | ||
8b2ff320 SK |
793 | int rc_open(struct rc_dev *rdev) |
794 | { | |
795 | int rval = 0; | |
796 | ||
797 | if (!rdev) | |
798 | return -EINVAL; | |
799 | ||
800 | mutex_lock(&rdev->lock); | |
c73bbaa4 | 801 | |
f02dcdd1 | 802 | if (!rdev->users++ && rdev->open != NULL) |
8b2ff320 SK |
803 | rval = rdev->open(rdev); |
804 | ||
805 | if (rval) | |
806 | rdev->users--; | |
807 | ||
808 | mutex_unlock(&rdev->lock); | |
809 | ||
810 | return rval; | |
811 | } | |
812 | EXPORT_SYMBOL_GPL(rc_open); | |
813 | ||
d8b4b582 | 814 | static int ir_open(struct input_dev *idev) |
ef53a115 | 815 | { |
d8b4b582 | 816 | struct rc_dev *rdev = input_get_drvdata(idev); |
75543cce | 817 | |
8b2ff320 SK |
818 | return rc_open(rdev); |
819 | } | |
820 | ||
821 | void rc_close(struct rc_dev *rdev) | |
822 | { | |
823 | if (rdev) { | |
824 | mutex_lock(&rdev->lock); | |
825 | ||
81b7d14e | 826 | if (!--rdev->users && rdev->close != NULL) |
8b2ff320 SK |
827 | rdev->close(rdev); |
828 | ||
829 | mutex_unlock(&rdev->lock); | |
830 | } | |
ef53a115 | 831 | } |
8b2ff320 | 832 | EXPORT_SYMBOL_GPL(rc_close); |
d4b778d3 | 833 | |
d8b4b582 | 834 | static void ir_close(struct input_dev *idev) |
f6fc5049 | 835 | { |
d8b4b582 | 836 | struct rc_dev *rdev = input_get_drvdata(idev); |
8b2ff320 | 837 | rc_close(rdev); |
f6fc5049 | 838 | } |
f6fc5049 | 839 | |
bc2a6c57 | 840 | /* class for /sys/class/rc */ |
40fc5325 | 841 | static char *rc_devnode(struct device *dev, umode_t *mode) |
bc2a6c57 MCC |
842 | { |
843 | return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev)); | |
844 | } | |
845 | ||
40fc5325 | 846 | static struct class rc_class = { |
bc2a6c57 | 847 | .name = "rc", |
40fc5325 | 848 | .devnode = rc_devnode, |
bc2a6c57 MCC |
849 | }; |
850 | ||
c003ab1b DH |
851 | /* |
852 | * These are the protocol textual descriptions that are | |
853 | * used by the sysfs protocols file. Note that the order | |
854 | * of the entries is relevant. | |
855 | */ | |
53df8777 | 856 | static const struct { |
bc2a6c57 | 857 | u64 type; |
53df8777 | 858 | const char *name; |
9f0bf366 | 859 | const char *module_name; |
bc2a6c57 | 860 | } proto_names[] = { |
9f0bf366 HK |
861 | { RC_BIT_NONE, "none", NULL }, |
862 | { RC_BIT_OTHER, "other", NULL }, | |
863 | { RC_BIT_UNKNOWN, "unknown", NULL }, | |
c003ab1b | 864 | { RC_BIT_RC5 | |
0fcd3f0a | 865 | RC_BIT_RC5X_20, "rc-5", "ir-rc5-decoder" }, |
2ceeca04 SY |
866 | { RC_BIT_NEC | |
867 | RC_BIT_NECX | | |
868 | RC_BIT_NEC32, "nec", "ir-nec-decoder" }, | |
c003ab1b DH |
869 | { RC_BIT_RC6_0 | |
870 | RC_BIT_RC6_6A_20 | | |
871 | RC_BIT_RC6_6A_24 | | |
872 | RC_BIT_RC6_6A_32 | | |
9f0bf366 HK |
873 | RC_BIT_RC6_MCE, "rc-6", "ir-rc6-decoder" }, |
874 | { RC_BIT_JVC, "jvc", "ir-jvc-decoder" }, | |
c003ab1b DH |
875 | { RC_BIT_SONY12 | |
876 | RC_BIT_SONY15 | | |
9f0bf366 HK |
877 | RC_BIT_SONY20, "sony", "ir-sony-decoder" }, |
878 | { RC_BIT_RC5_SZ, "rc-5-sz", "ir-rc5-decoder" }, | |
879 | { RC_BIT_SANYO, "sanyo", "ir-sanyo-decoder" }, | |
880 | { RC_BIT_SHARP, "sharp", "ir-sharp-decoder" }, | |
881 | { RC_BIT_MCE_KBD, "mce_kbd", "ir-mce_kbd-decoder" }, | |
882 | { RC_BIT_XMP, "xmp", "ir-xmp-decoder" }, | |
ff42c8aa | 883 | { RC_BIT_CEC, "cec", NULL }, |
bc2a6c57 MCC |
884 | }; |
885 | ||
bc2a6c57 | 886 | /** |
ab88c66d JH |
887 | * struct rc_filter_attribute - Device attribute relating to a filter type. |
888 | * @attr: Device attribute. | |
889 | * @type: Filter type. | |
890 | * @mask: false for filter value, true for filter mask. | |
891 | */ | |
892 | struct rc_filter_attribute { | |
893 | struct device_attribute attr; | |
894 | enum rc_filter_type type; | |
895 | bool mask; | |
896 | }; | |
897 | #define to_rc_filter_attr(a) container_of(a, struct rc_filter_attribute, attr) | |
898 | ||
ab88c66d JH |
899 | #define RC_FILTER_ATTR(_name, _mode, _show, _store, _type, _mask) \ |
900 | struct rc_filter_attribute dev_attr_##_name = { \ | |
901 | .attr = __ATTR(_name, _mode, _show, _store), \ | |
902 | .type = (_type), \ | |
903 | .mask = (_mask), \ | |
904 | } | |
905 | ||
dd6ff6a0 DH |
906 | static bool lirc_is_present(void) |
907 | { | |
908 | #if defined(CONFIG_LIRC_MODULE) | |
909 | struct module *lirc; | |
910 | ||
911 | mutex_lock(&module_mutex); | |
912 | lirc = find_module("lirc_dev"); | |
913 | mutex_unlock(&module_mutex); | |
914 | ||
915 | return lirc ? true : false; | |
916 | #elif defined(CONFIG_LIRC) | |
917 | return true; | |
918 | #else | |
919 | return false; | |
920 | #endif | |
921 | } | |
922 | ||
ab88c66d | 923 | /** |
0751d33c | 924 | * show_protocols() - shows the current IR protocol(s) |
d8b4b582 | 925 | * @device: the device descriptor |
da6e162d | 926 | * @mattr: the device attribute struct |
bc2a6c57 MCC |
927 | * @buf: a pointer to the output buffer |
928 | * | |
929 | * This routine is a callback routine for input read the IR protocol type(s). | |
0751d33c | 930 | * it is trigged by reading /sys/class/rc/rc?/protocols. |
bc2a6c57 MCC |
931 | * It returns the protocol names of supported protocols. |
932 | * Enabled protocols are printed in brackets. | |
08aeb7c9 JW |
933 | * |
934 | * dev->lock is taken to guard against races between device | |
935 | * registration, store_protocols and show_protocols. | |
bc2a6c57 | 936 | */ |
d8b4b582 | 937 | static ssize_t show_protocols(struct device *device, |
bc2a6c57 MCC |
938 | struct device_attribute *mattr, char *buf) |
939 | { | |
d8b4b582 | 940 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 MCC |
941 | u64 allowed, enabled; |
942 | char *tmp = buf; | |
943 | int i; | |
944 | ||
945 | /* Device is being removed */ | |
d8b4b582 | 946 | if (!dev) |
bc2a6c57 MCC |
947 | return -EINVAL; |
948 | ||
078600f5 MCC |
949 | if (!atomic_read(&dev->initialized)) |
950 | return -ERESTARTSYS; | |
951 | ||
08aeb7c9 JW |
952 | mutex_lock(&dev->lock); |
953 | ||
0751d33c SY |
954 | enabled = dev->enabled_protocols; |
955 | allowed = dev->allowed_protocols; | |
956 | if (dev->raw && !allowed) | |
957 | allowed = ir_raw_get_allowed_protocols(); | |
bc2a6c57 | 958 | |
da6e162d DH |
959 | mutex_unlock(&dev->lock); |
960 | ||
961 | IR_dprintk(1, "%s: allowed - 0x%llx, enabled - 0x%llx\n", | |
962 | __func__, (long long)allowed, (long long)enabled); | |
bc2a6c57 MCC |
963 | |
964 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
965 | if (allowed & enabled & proto_names[i].type) | |
966 | tmp += sprintf(tmp, "[%s] ", proto_names[i].name); | |
967 | else if (allowed & proto_names[i].type) | |
968 | tmp += sprintf(tmp, "%s ", proto_names[i].name); | |
c003ab1b DH |
969 | |
970 | if (allowed & proto_names[i].type) | |
971 | allowed &= ~proto_names[i].type; | |
bc2a6c57 MCC |
972 | } |
973 | ||
dd6ff6a0 | 974 | if (dev->driver_type == RC_DRIVER_IR_RAW && lirc_is_present()) |
275ddb40 DH |
975 | tmp += sprintf(tmp, "[lirc] "); |
976 | ||
bc2a6c57 MCC |
977 | if (tmp != buf) |
978 | tmp--; | |
979 | *tmp = '\n'; | |
08aeb7c9 | 980 | |
bc2a6c57 MCC |
981 | return tmp + 1 - buf; |
982 | } | |
983 | ||
984 | /** | |
da6e162d DH |
985 | * parse_protocol_change() - parses a protocol change request |
986 | * @protocols: pointer to the bitmask of current protocols | |
987 | * @buf: pointer to the buffer with a list of changes | |
bc2a6c57 | 988 | * |
da6e162d DH |
989 | * Writing "+proto" will add a protocol to the protocol mask. |
990 | * Writing "-proto" will remove a protocol from protocol mask. | |
bc2a6c57 MCC |
991 | * Writing "proto" will enable only "proto". |
992 | * Writing "none" will disable all protocols. | |
da6e162d | 993 | * Returns the number of changes performed or a negative error code. |
bc2a6c57 | 994 | */ |
da6e162d | 995 | static int parse_protocol_change(u64 *protocols, const char *buf) |
bc2a6c57 | 996 | { |
bc2a6c57 | 997 | const char *tmp; |
da6e162d DH |
998 | unsigned count = 0; |
999 | bool enable, disable; | |
bc2a6c57 | 1000 | u64 mask; |
da6e162d | 1001 | int i; |
bc2a6c57 | 1002 | |
da6e162d | 1003 | while ((tmp = strsep((char **)&buf, " \n")) != NULL) { |
bc2a6c57 MCC |
1004 | if (!*tmp) |
1005 | break; | |
1006 | ||
1007 | if (*tmp == '+') { | |
1008 | enable = true; | |
1009 | disable = false; | |
1010 | tmp++; | |
1011 | } else if (*tmp == '-') { | |
1012 | enable = false; | |
1013 | disable = true; | |
1014 | tmp++; | |
1015 | } else { | |
1016 | enable = false; | |
1017 | disable = false; | |
1018 | } | |
1019 | ||
c003ab1b DH |
1020 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { |
1021 | if (!strcasecmp(tmp, proto_names[i].name)) { | |
1022 | mask = proto_names[i].type; | |
1023 | break; | |
bc2a6c57 | 1024 | } |
bc2a6c57 MCC |
1025 | } |
1026 | ||
c003ab1b | 1027 | if (i == ARRAY_SIZE(proto_names)) { |
275ddb40 DH |
1028 | if (!strcasecmp(tmp, "lirc")) |
1029 | mask = 0; | |
1030 | else { | |
1031 | IR_dprintk(1, "Unknown protocol: '%s'\n", tmp); | |
1032 | return -EINVAL; | |
1033 | } | |
c003ab1b DH |
1034 | } |
1035 | ||
1036 | count++; | |
1037 | ||
bc2a6c57 | 1038 | if (enable) |
da6e162d | 1039 | *protocols |= mask; |
bc2a6c57 | 1040 | else if (disable) |
da6e162d | 1041 | *protocols &= ~mask; |
bc2a6c57 | 1042 | else |
da6e162d | 1043 | *protocols = mask; |
bc2a6c57 MCC |
1044 | } |
1045 | ||
1046 | if (!count) { | |
1047 | IR_dprintk(1, "Protocol not specified\n"); | |
da6e162d DH |
1048 | return -EINVAL; |
1049 | } | |
1050 | ||
1051 | return count; | |
1052 | } | |
1053 | ||
9f0bf366 | 1054 | static void ir_raw_load_modules(u64 *protocols) |
9f0bf366 HK |
1055 | { |
1056 | u64 available; | |
1057 | int i, ret; | |
1058 | ||
1059 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
1060 | if (proto_names[i].type == RC_BIT_NONE || | |
1061 | proto_names[i].type & (RC_BIT_OTHER | RC_BIT_UNKNOWN)) | |
1062 | continue; | |
1063 | ||
1064 | available = ir_raw_get_allowed_protocols(); | |
1065 | if (!(*protocols & proto_names[i].type & ~available)) | |
1066 | continue; | |
1067 | ||
1068 | if (!proto_names[i].module_name) { | |
1069 | pr_err("Can't enable IR protocol %s\n", | |
1070 | proto_names[i].name); | |
1071 | *protocols &= ~proto_names[i].type; | |
1072 | continue; | |
1073 | } | |
1074 | ||
1075 | ret = request_module("%s", proto_names[i].module_name); | |
1076 | if (ret < 0) { | |
1077 | pr_err("Couldn't load IR protocol module %s\n", | |
1078 | proto_names[i].module_name); | |
1079 | *protocols &= ~proto_names[i].type; | |
1080 | continue; | |
1081 | } | |
1082 | msleep(20); | |
1083 | available = ir_raw_get_allowed_protocols(); | |
1084 | if (!(*protocols & proto_names[i].type & ~available)) | |
1085 | continue; | |
1086 | ||
8caebcdc | 1087 | pr_err("Loaded IR protocol module %s, but protocol %s still not available\n", |
9f0bf366 HK |
1088 | proto_names[i].module_name, |
1089 | proto_names[i].name); | |
1090 | *protocols &= ~proto_names[i].type; | |
1091 | } | |
1092 | } | |
1093 | ||
da6e162d DH |
1094 | /** |
1095 | * store_protocols() - changes the current/wakeup IR protocol(s) | |
1096 | * @device: the device descriptor | |
1097 | * @mattr: the device attribute struct | |
1098 | * @buf: a pointer to the input buffer | |
1099 | * @len: length of the input buffer | |
1100 | * | |
1101 | * This routine is for changing the IR protocol type. | |
1102 | * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]protocols. | |
1103 | * See parse_protocol_change() for the valid commands. | |
1104 | * Returns @len on success or a negative error code. | |
1105 | * | |
1106 | * dev->lock is taken to guard against races between device | |
1107 | * registration, store_protocols and show_protocols. | |
1108 | */ | |
1109 | static ssize_t store_protocols(struct device *device, | |
1110 | struct device_attribute *mattr, | |
1111 | const char *buf, size_t len) | |
1112 | { | |
1113 | struct rc_dev *dev = to_rc_dev(device); | |
da6e162d | 1114 | u64 *current_protocols; |
da6e162d | 1115 | struct rc_scancode_filter *filter; |
da6e162d DH |
1116 | u64 old_protocols, new_protocols; |
1117 | ssize_t rc; | |
1118 | ||
1119 | /* Device is being removed */ | |
1120 | if (!dev) | |
1121 | return -EINVAL; | |
1122 | ||
078600f5 MCC |
1123 | if (!atomic_read(&dev->initialized)) |
1124 | return -ERESTARTSYS; | |
1125 | ||
0751d33c SY |
1126 | IR_dprintk(1, "Normal protocol change requested\n"); |
1127 | current_protocols = &dev->enabled_protocols; | |
1128 | filter = &dev->scancode_filter; | |
da6e162d | 1129 | |
0751d33c | 1130 | if (!dev->change_protocol) { |
da6e162d DH |
1131 | IR_dprintk(1, "Protocol switching not supported\n"); |
1132 | return -EINVAL; | |
1133 | } | |
1134 | ||
1135 | mutex_lock(&dev->lock); | |
1136 | ||
1137 | old_protocols = *current_protocols; | |
1138 | new_protocols = old_protocols; | |
1139 | rc = parse_protocol_change(&new_protocols, buf); | |
1140 | if (rc < 0) | |
1141 | goto out; | |
1142 | ||
0751d33c | 1143 | rc = dev->change_protocol(dev, &new_protocols); |
da6e162d DH |
1144 | if (rc < 0) { |
1145 | IR_dprintk(1, "Error setting protocols to 0x%llx\n", | |
1146 | (long long)new_protocols); | |
08aeb7c9 | 1147 | goto out; |
bc2a6c57 MCC |
1148 | } |
1149 | ||
9f0bf366 HK |
1150 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1151 | ir_raw_load_modules(&new_protocols); | |
1152 | ||
983c5bd2 JH |
1153 | if (new_protocols != old_protocols) { |
1154 | *current_protocols = new_protocols; | |
1155 | IR_dprintk(1, "Protocols changed to 0x%llx\n", | |
1156 | (long long)new_protocols); | |
bc2a6c57 MCC |
1157 | } |
1158 | ||
6bea25af | 1159 | /* |
983c5bd2 JH |
1160 | * If a protocol change was attempted the filter may need updating, even |
1161 | * if the actual protocol mask hasn't changed (since the driver may have | |
1162 | * cleared the filter). | |
6bea25af JH |
1163 | * Try setting the same filter with the new protocol (if any). |
1164 | * Fall back to clearing the filter. | |
1165 | */ | |
0751d33c | 1166 | if (dev->s_filter && filter->mask) { |
da6e162d | 1167 | if (new_protocols) |
0751d33c | 1168 | rc = dev->s_filter(dev, filter); |
da6e162d DH |
1169 | else |
1170 | rc = -1; | |
6bea25af | 1171 | |
da6e162d DH |
1172 | if (rc < 0) { |
1173 | filter->data = 0; | |
1174 | filter->mask = 0; | |
0751d33c | 1175 | dev->s_filter(dev, filter); |
da6e162d | 1176 | } |
6bea25af JH |
1177 | } |
1178 | ||
da6e162d | 1179 | rc = len; |
08aeb7c9 JW |
1180 | |
1181 | out: | |
1182 | mutex_unlock(&dev->lock); | |
da6e162d | 1183 | return rc; |
bc2a6c57 MCC |
1184 | } |
1185 | ||
00942d1a JH |
1186 | /** |
1187 | * show_filter() - shows the current scancode filter value or mask | |
1188 | * @device: the device descriptor | |
1189 | * @attr: the device attribute struct | |
1190 | * @buf: a pointer to the output buffer | |
1191 | * | |
1192 | * This routine is a callback routine to read a scancode filter value or mask. | |
1193 | * It is trigged by reading /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1194 | * It prints the current scancode filter value or mask of the appropriate filter | |
1195 | * type in hexadecimal into @buf and returns the size of the buffer. | |
1196 | * | |
1197 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1198 | * compared against input scancodes and non-matching scancodes are discarded. | |
1199 | * | |
1200 | * dev->lock is taken to guard against races between device registration, | |
1201 | * store_filter and show_filter. | |
1202 | */ | |
1203 | static ssize_t show_filter(struct device *device, | |
1204 | struct device_attribute *attr, | |
1205 | char *buf) | |
1206 | { | |
1207 | struct rc_dev *dev = to_rc_dev(device); | |
1208 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
da6e162d | 1209 | struct rc_scancode_filter *filter; |
00942d1a JH |
1210 | u32 val; |
1211 | ||
1212 | /* Device is being removed */ | |
1213 | if (!dev) | |
1214 | return -EINVAL; | |
1215 | ||
078600f5 MCC |
1216 | if (!atomic_read(&dev->initialized)) |
1217 | return -ERESTARTSYS; | |
1218 | ||
c73bbaa4 | 1219 | mutex_lock(&dev->lock); |
c73bbaa4 | 1220 | |
da6e162d | 1221 | if (fattr->type == RC_FILTER_NORMAL) |
c5540fbb | 1222 | filter = &dev->scancode_filter; |
da6e162d | 1223 | else |
c5540fbb | 1224 | filter = &dev->scancode_wakeup_filter; |
da6e162d | 1225 | |
da6e162d DH |
1226 | if (fattr->mask) |
1227 | val = filter->mask; | |
00942d1a | 1228 | else |
da6e162d | 1229 | val = filter->data; |
00942d1a JH |
1230 | mutex_unlock(&dev->lock); |
1231 | ||
1232 | return sprintf(buf, "%#x\n", val); | |
1233 | } | |
1234 | ||
1235 | /** | |
1236 | * store_filter() - changes the scancode filter value | |
1237 | * @device: the device descriptor | |
1238 | * @attr: the device attribute struct | |
1239 | * @buf: a pointer to the input buffer | |
1240 | * @len: length of the input buffer | |
1241 | * | |
1242 | * This routine is for changing a scancode filter value or mask. | |
1243 | * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1244 | * Returns -EINVAL if an invalid filter value for the current protocol was | |
1245 | * specified or if scancode filtering is not supported by the driver, otherwise | |
1246 | * returns @len. | |
1247 | * | |
1248 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1249 | * compared against input scancodes and non-matching scancodes are discarded. | |
1250 | * | |
1251 | * dev->lock is taken to guard against races between device registration, | |
1252 | * store_filter and show_filter. | |
1253 | */ | |
1254 | static ssize_t store_filter(struct device *device, | |
1255 | struct device_attribute *attr, | |
da6e162d | 1256 | const char *buf, size_t len) |
00942d1a JH |
1257 | { |
1258 | struct rc_dev *dev = to_rc_dev(device); | |
1259 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
da6e162d | 1260 | struct rc_scancode_filter new_filter, *filter; |
00942d1a JH |
1261 | int ret; |
1262 | unsigned long val; | |
23c843b5 | 1263 | int (*set_filter)(struct rc_dev *dev, struct rc_scancode_filter *filter); |
00942d1a JH |
1264 | |
1265 | /* Device is being removed */ | |
1266 | if (!dev) | |
1267 | return -EINVAL; | |
1268 | ||
078600f5 MCC |
1269 | if (!atomic_read(&dev->initialized)) |
1270 | return -ERESTARTSYS; | |
1271 | ||
00942d1a JH |
1272 | ret = kstrtoul(buf, 0, &val); |
1273 | if (ret < 0) | |
1274 | return ret; | |
1275 | ||
da6e162d DH |
1276 | if (fattr->type == RC_FILTER_NORMAL) { |
1277 | set_filter = dev->s_filter; | |
c5540fbb | 1278 | filter = &dev->scancode_filter; |
da6e162d DH |
1279 | } else { |
1280 | set_filter = dev->s_wakeup_filter; | |
c5540fbb | 1281 | filter = &dev->scancode_wakeup_filter; |
da6e162d DH |
1282 | } |
1283 | ||
99b0f3c9 DH |
1284 | if (!set_filter) |
1285 | return -EINVAL; | |
00942d1a JH |
1286 | |
1287 | mutex_lock(&dev->lock); | |
1288 | ||
da6e162d | 1289 | new_filter = *filter; |
00942d1a | 1290 | if (fattr->mask) |
da6e162d | 1291 | new_filter.mask = val; |
00942d1a | 1292 | else |
da6e162d | 1293 | new_filter.data = val; |
23c843b5 | 1294 | |
0751d33c | 1295 | if (fattr->type == RC_FILTER_WAKEUP) { |
b590c0bf SY |
1296 | /* |
1297 | * Refuse to set a filter unless a protocol is enabled | |
1298 | * and the filter is valid for that protocol | |
1299 | */ | |
1300 | if (dev->wakeup_protocol != RC_TYPE_UNKNOWN) | |
f423ccc1 | 1301 | ret = rc_validate_filter(dev, &new_filter); |
b590c0bf | 1302 | else |
0751d33c | 1303 | ret = -EINVAL; |
b590c0bf SY |
1304 | |
1305 | if (ret != 0) | |
0751d33c | 1306 | goto unlock; |
0751d33c SY |
1307 | } |
1308 | ||
1309 | if (fattr->type == RC_FILTER_NORMAL && !dev->enabled_protocols && | |
1310 | val) { | |
6bea25af JH |
1311 | /* refuse to set a filter unless a protocol is enabled */ |
1312 | ret = -EINVAL; | |
1313 | goto unlock; | |
1314 | } | |
23c843b5 | 1315 | |
da6e162d | 1316 | ret = set_filter(dev, &new_filter); |
99b0f3c9 DH |
1317 | if (ret < 0) |
1318 | goto unlock; | |
00942d1a | 1319 | |
da6e162d | 1320 | *filter = new_filter; |
00942d1a JH |
1321 | |
1322 | unlock: | |
1323 | mutex_unlock(&dev->lock); | |
da6e162d | 1324 | return (ret < 0) ? ret : len; |
00942d1a JH |
1325 | } |
1326 | ||
0751d33c SY |
1327 | /* |
1328 | * This is the list of all variants of all protocols, which is used by | |
1329 | * the wakeup_protocols sysfs entry. In the protocols sysfs entry some | |
1330 | * some protocols are grouped together (e.g. nec = nec + necx + nec32). | |
1331 | * | |
1332 | * For wakeup we need to know the exact protocol variant so the hardware | |
1333 | * can be programmed exactly what to expect. | |
1334 | */ | |
1335 | static const char * const proto_variant_names[] = { | |
1336 | [RC_TYPE_UNKNOWN] = "unknown", | |
1337 | [RC_TYPE_OTHER] = "other", | |
1338 | [RC_TYPE_RC5] = "rc-5", | |
1339 | [RC_TYPE_RC5X_20] = "rc-5x-20", | |
1340 | [RC_TYPE_RC5_SZ] = "rc-5-sz", | |
1341 | [RC_TYPE_JVC] = "jvc", | |
1342 | [RC_TYPE_SONY12] = "sony-12", | |
1343 | [RC_TYPE_SONY15] = "sony-15", | |
1344 | [RC_TYPE_SONY20] = "sony-20", | |
1345 | [RC_TYPE_NEC] = "nec", | |
1346 | [RC_TYPE_NECX] = "nec-x", | |
1347 | [RC_TYPE_NEC32] = "nec-32", | |
1348 | [RC_TYPE_SANYO] = "sanyo", | |
1349 | [RC_TYPE_MCE_KBD] = "mce_kbd", | |
1350 | [RC_TYPE_RC6_0] = "rc-6-0", | |
1351 | [RC_TYPE_RC6_6A_20] = "rc-6-6a-20", | |
1352 | [RC_TYPE_RC6_6A_24] = "rc-6-6a-24", | |
1353 | [RC_TYPE_RC6_6A_32] = "rc-6-6a-32", | |
1354 | [RC_TYPE_RC6_MCE] = "rc-6-mce", | |
1355 | [RC_TYPE_SHARP] = "sharp", | |
1356 | [RC_TYPE_XMP] = "xmp", | |
1357 | [RC_TYPE_CEC] = "cec", | |
1358 | }; | |
1359 | ||
1360 | /** | |
1361 | * show_wakeup_protocols() - shows the wakeup IR protocol | |
1362 | * @device: the device descriptor | |
1363 | * @mattr: the device attribute struct | |
1364 | * @buf: a pointer to the output buffer | |
1365 | * | |
1366 | * This routine is a callback routine for input read the IR protocol type(s). | |
1367 | * it is trigged by reading /sys/class/rc/rc?/wakeup_protocols. | |
1368 | * It returns the protocol names of supported protocols. | |
1369 | * The enabled protocols are printed in brackets. | |
1370 | * | |
1371 | * dev->lock is taken to guard against races between device | |
1372 | * registration, store_protocols and show_protocols. | |
1373 | */ | |
1374 | static ssize_t show_wakeup_protocols(struct device *device, | |
1375 | struct device_attribute *mattr, | |
1376 | char *buf) | |
1377 | { | |
1378 | struct rc_dev *dev = to_rc_dev(device); | |
1379 | u64 allowed; | |
1380 | enum rc_type enabled; | |
1381 | char *tmp = buf; | |
1382 | int i; | |
1383 | ||
1384 | /* Device is being removed */ | |
1385 | if (!dev) | |
1386 | return -EINVAL; | |
1387 | ||
1388 | if (!atomic_read(&dev->initialized)) | |
1389 | return -ERESTARTSYS; | |
1390 | ||
1391 | mutex_lock(&dev->lock); | |
1392 | ||
1393 | allowed = dev->allowed_wakeup_protocols; | |
1394 | enabled = dev->wakeup_protocol; | |
1395 | ||
1396 | mutex_unlock(&dev->lock); | |
1397 | ||
1398 | IR_dprintk(1, "%s: allowed - 0x%llx, enabled - %d\n", | |
1399 | __func__, (long long)allowed, enabled); | |
1400 | ||
1401 | for (i = 0; i < ARRAY_SIZE(proto_variant_names); i++) { | |
1402 | if (allowed & (1ULL << i)) { | |
1403 | if (i == enabled) | |
1404 | tmp += sprintf(tmp, "[%s] ", | |
1405 | proto_variant_names[i]); | |
1406 | else | |
1407 | tmp += sprintf(tmp, "%s ", | |
1408 | proto_variant_names[i]); | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | if (tmp != buf) | |
1413 | tmp--; | |
1414 | *tmp = '\n'; | |
1415 | ||
1416 | return tmp + 1 - buf; | |
1417 | } | |
1418 | ||
1419 | /** | |
1420 | * store_wakeup_protocols() - changes the wakeup IR protocol(s) | |
1421 | * @device: the device descriptor | |
1422 | * @mattr: the device attribute struct | |
1423 | * @buf: a pointer to the input buffer | |
1424 | * @len: length of the input buffer | |
1425 | * | |
1426 | * This routine is for changing the IR protocol type. | |
1427 | * It is trigged by writing to /sys/class/rc/rc?/wakeup_protocols. | |
1428 | * Returns @len on success or a negative error code. | |
1429 | * | |
1430 | * dev->lock is taken to guard against races between device | |
1431 | * registration, store_protocols and show_protocols. | |
1432 | */ | |
1433 | static ssize_t store_wakeup_protocols(struct device *device, | |
1434 | struct device_attribute *mattr, | |
1435 | const char *buf, size_t len) | |
1436 | { | |
1437 | struct rc_dev *dev = to_rc_dev(device); | |
1438 | enum rc_type protocol; | |
1439 | ssize_t rc; | |
1440 | u64 allowed; | |
1441 | int i; | |
1442 | ||
1443 | /* Device is being removed */ | |
1444 | if (!dev) | |
1445 | return -EINVAL; | |
1446 | ||
1447 | if (!atomic_read(&dev->initialized)) | |
1448 | return -ERESTARTSYS; | |
1449 | ||
1450 | mutex_lock(&dev->lock); | |
1451 | ||
1452 | allowed = dev->allowed_wakeup_protocols; | |
1453 | ||
1454 | if (sysfs_streq(buf, "none")) { | |
1455 | protocol = RC_TYPE_UNKNOWN; | |
1456 | } else { | |
1457 | for (i = 0; i < ARRAY_SIZE(proto_variant_names); i++) { | |
1458 | if ((allowed & (1ULL << i)) && | |
1459 | sysfs_streq(buf, proto_variant_names[i])) { | |
1460 | protocol = i; | |
1461 | break; | |
1462 | } | |
1463 | } | |
1464 | ||
1465 | if (i == ARRAY_SIZE(proto_variant_names)) { | |
1466 | rc = -EINVAL; | |
1467 | goto out; | |
1468 | } | |
f423ccc1 JH |
1469 | |
1470 | if (dev->encode_wakeup) { | |
1471 | u64 mask = 1ULL << protocol; | |
1472 | ||
1473 | ir_raw_load_modules(&mask); | |
1474 | if (!mask) { | |
1475 | rc = -EINVAL; | |
1476 | goto out; | |
1477 | } | |
1478 | } | |
0751d33c SY |
1479 | } |
1480 | ||
1481 | if (dev->wakeup_protocol != protocol) { | |
1482 | dev->wakeup_protocol = protocol; | |
1483 | IR_dprintk(1, "Wakeup protocol changed to %d\n", protocol); | |
1484 | ||
1485 | if (protocol == RC_TYPE_RC6_MCE) | |
1486 | dev->scancode_wakeup_filter.data = 0x800f0000; | |
1487 | else | |
1488 | dev->scancode_wakeup_filter.data = 0; | |
1489 | dev->scancode_wakeup_filter.mask = 0; | |
1490 | ||
1491 | rc = dev->s_wakeup_filter(dev, &dev->scancode_wakeup_filter); | |
1492 | if (rc == 0) | |
1493 | rc = len; | |
1494 | } else { | |
1495 | rc = len; | |
1496 | } | |
1497 | ||
1498 | out: | |
1499 | mutex_unlock(&dev->lock); | |
1500 | return rc; | |
1501 | } | |
1502 | ||
d8b4b582 DH |
1503 | static void rc_dev_release(struct device *device) |
1504 | { | |
47cae1e1 MK |
1505 | struct rc_dev *dev = to_rc_dev(device); |
1506 | ||
1507 | kfree(dev); | |
d8b4b582 DH |
1508 | } |
1509 | ||
bc2a6c57 MCC |
1510 | #define ADD_HOTPLUG_VAR(fmt, val...) \ |
1511 | do { \ | |
1512 | int err = add_uevent_var(env, fmt, val); \ | |
1513 | if (err) \ | |
1514 | return err; \ | |
1515 | } while (0) | |
1516 | ||
1517 | static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) | |
1518 | { | |
d8b4b582 | 1519 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 | 1520 | |
b088ba65 MCC |
1521 | if (dev->rc_map.name) |
1522 | ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name); | |
d8b4b582 DH |
1523 | if (dev->driver_name) |
1524 | ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name); | |
bc2a6c57 MCC |
1525 | |
1526 | return 0; | |
1527 | } | |
1528 | ||
1529 | /* | |
1530 | * Static device attribute struct with the sysfs attributes for IR's | |
1531 | */ | |
0751d33c SY |
1532 | static DEVICE_ATTR(protocols, 0644, show_protocols, store_protocols); |
1533 | static DEVICE_ATTR(wakeup_protocols, 0644, show_wakeup_protocols, | |
1534 | store_wakeup_protocols); | |
00942d1a JH |
1535 | static RC_FILTER_ATTR(filter, S_IRUGO|S_IWUSR, |
1536 | show_filter, store_filter, RC_FILTER_NORMAL, false); | |
1537 | static RC_FILTER_ATTR(filter_mask, S_IRUGO|S_IWUSR, | |
1538 | show_filter, store_filter, RC_FILTER_NORMAL, true); | |
1539 | static RC_FILTER_ATTR(wakeup_filter, S_IRUGO|S_IWUSR, | |
1540 | show_filter, store_filter, RC_FILTER_WAKEUP, false); | |
1541 | static RC_FILTER_ATTR(wakeup_filter_mask, S_IRUGO|S_IWUSR, | |
1542 | show_filter, store_filter, RC_FILTER_WAKEUP, true); | |
bc2a6c57 | 1543 | |
99b0f3c9 | 1544 | static struct attribute *rc_dev_protocol_attrs[] = { |
0751d33c | 1545 | &dev_attr_protocols.attr, |
99b0f3c9 DH |
1546 | NULL, |
1547 | }; | |
1548 | ||
1549 | static struct attribute_group rc_dev_protocol_attr_grp = { | |
1550 | .attrs = rc_dev_protocol_attrs, | |
1551 | }; | |
1552 | ||
99b0f3c9 | 1553 | static struct attribute *rc_dev_filter_attrs[] = { |
00942d1a JH |
1554 | &dev_attr_filter.attr.attr, |
1555 | &dev_attr_filter_mask.attr.attr, | |
bc2a6c57 MCC |
1556 | NULL, |
1557 | }; | |
1558 | ||
99b0f3c9 DH |
1559 | static struct attribute_group rc_dev_filter_attr_grp = { |
1560 | .attrs = rc_dev_filter_attrs, | |
bc2a6c57 MCC |
1561 | }; |
1562 | ||
99b0f3c9 DH |
1563 | static struct attribute *rc_dev_wakeup_filter_attrs[] = { |
1564 | &dev_attr_wakeup_filter.attr.attr, | |
1565 | &dev_attr_wakeup_filter_mask.attr.attr, | |
0751d33c | 1566 | &dev_attr_wakeup_protocols.attr, |
99b0f3c9 DH |
1567 | NULL, |
1568 | }; | |
1569 | ||
1570 | static struct attribute_group rc_dev_wakeup_filter_attr_grp = { | |
1571 | .attrs = rc_dev_wakeup_filter_attrs, | |
bc2a6c57 MCC |
1572 | }; |
1573 | ||
1574 | static struct device_type rc_dev_type = { | |
d8b4b582 | 1575 | .release = rc_dev_release, |
bc2a6c57 MCC |
1576 | .uevent = rc_dev_uevent, |
1577 | }; | |
1578 | ||
0f7499fd | 1579 | struct rc_dev *rc_allocate_device(enum rc_driver_type type) |
bc2a6c57 | 1580 | { |
d8b4b582 | 1581 | struct rc_dev *dev; |
bc2a6c57 | 1582 | |
d8b4b582 DH |
1583 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1584 | if (!dev) | |
1585 | return NULL; | |
1586 | ||
d34aee10 AS |
1587 | if (type != RC_DRIVER_IR_RAW_TX) { |
1588 | dev->input_dev = input_allocate_device(); | |
1589 | if (!dev->input_dev) { | |
1590 | kfree(dev); | |
1591 | return NULL; | |
1592 | } | |
1593 | ||
1594 | dev->input_dev->getkeycode = ir_getkeycode; | |
1595 | dev->input_dev->setkeycode = ir_setkeycode; | |
1596 | input_set_drvdata(dev->input_dev, dev); | |
d8b4b582 | 1597 | |
d34aee10 AS |
1598 | setup_timer(&dev->timer_keyup, ir_timer_keyup, |
1599 | (unsigned long)dev); | |
d8b4b582 | 1600 | |
d34aee10 AS |
1601 | spin_lock_init(&dev->rc_map.lock); |
1602 | spin_lock_init(&dev->keylock); | |
1603 | } | |
08aeb7c9 | 1604 | mutex_init(&dev->lock); |
bc2a6c57 | 1605 | |
d8b4b582 | 1606 | dev->dev.type = &rc_dev_type; |
40fc5325 | 1607 | dev->dev.class = &rc_class; |
d8b4b582 DH |
1608 | device_initialize(&dev->dev); |
1609 | ||
0f7499fd AS |
1610 | dev->driver_type = type; |
1611 | ||
d8b4b582 DH |
1612 | __module_get(THIS_MODULE); |
1613 | return dev; | |
1614 | } | |
1615 | EXPORT_SYMBOL_GPL(rc_allocate_device); | |
1616 | ||
1617 | void rc_free_device(struct rc_dev *dev) | |
bc2a6c57 | 1618 | { |
b05681b9 MCC |
1619 | if (!dev) |
1620 | return; | |
1621 | ||
3dd94f00 | 1622 | input_free_device(dev->input_dev); |
b05681b9 MCC |
1623 | |
1624 | put_device(&dev->dev); | |
1625 | ||
47cae1e1 MK |
1626 | /* kfree(dev) will be called by the callback function |
1627 | rc_dev_release() */ | |
1628 | ||
b05681b9 | 1629 | module_put(THIS_MODULE); |
d8b4b582 DH |
1630 | } |
1631 | EXPORT_SYMBOL_GPL(rc_free_device); | |
1632 | ||
ddbf7d5a HK |
1633 | static void devm_rc_alloc_release(struct device *dev, void *res) |
1634 | { | |
1635 | rc_free_device(*(struct rc_dev **)res); | |
1636 | } | |
1637 | ||
0f7499fd AS |
1638 | struct rc_dev *devm_rc_allocate_device(struct device *dev, |
1639 | enum rc_driver_type type) | |
ddbf7d5a HK |
1640 | { |
1641 | struct rc_dev **dr, *rc; | |
1642 | ||
1643 | dr = devres_alloc(devm_rc_alloc_release, sizeof(*dr), GFP_KERNEL); | |
1644 | if (!dr) | |
1645 | return NULL; | |
1646 | ||
0f7499fd | 1647 | rc = rc_allocate_device(type); |
ddbf7d5a HK |
1648 | if (!rc) { |
1649 | devres_free(dr); | |
1650 | return NULL; | |
1651 | } | |
1652 | ||
1653 | rc->dev.parent = dev; | |
1654 | rc->managed_alloc = true; | |
1655 | *dr = rc; | |
1656 | devres_add(dev, dr); | |
1657 | ||
1658 | return rc; | |
1659 | } | |
1660 | EXPORT_SYMBOL_GPL(devm_rc_allocate_device); | |
1661 | ||
7ff2c2bc | 1662 | static int rc_setup_rx_device(struct rc_dev *dev) |
d8b4b582 | 1663 | { |
fcb13097 | 1664 | int rc; |
7ff2c2bc | 1665 | struct rc_map *rc_map; |
41380868 | 1666 | u64 rc_type; |
bc2a6c57 | 1667 | |
7ff2c2bc | 1668 | if (!dev->map_name) |
d8b4b582 | 1669 | return -EINVAL; |
bc2a6c57 | 1670 | |
d100e659 | 1671 | rc_map = rc_map_get(dev->map_name); |
b088ba65 | 1672 | if (!rc_map) |
d100e659 | 1673 | rc_map = rc_map_get(RC_MAP_EMPTY); |
b088ba65 | 1674 | if (!rc_map || !rc_map->scan || rc_map->size == 0) |
d8b4b582 DH |
1675 | return -EINVAL; |
1676 | ||
7ff2c2bc AS |
1677 | rc = ir_setkeytable(dev, rc_map); |
1678 | if (rc) | |
1679 | return rc; | |
1680 | ||
41380868 | 1681 | rc_type = BIT_ULL(rc_map->rc_type); |
7ff2c2bc | 1682 | |
41380868 | 1683 | if (dev->change_protocol) { |
7ff2c2bc AS |
1684 | rc = dev->change_protocol(dev, &rc_type); |
1685 | if (rc < 0) | |
1686 | goto out_table; | |
1687 | dev->enabled_protocols = rc_type; | |
1688 | } | |
1689 | ||
41380868 SY |
1690 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1691 | ir_raw_load_modules(&rc_type); | |
1692 | ||
d8b4b582 DH |
1693 | set_bit(EV_KEY, dev->input_dev->evbit); |
1694 | set_bit(EV_REP, dev->input_dev->evbit); | |
1695 | set_bit(EV_MSC, dev->input_dev->evbit); | |
1696 | set_bit(MSC_SCAN, dev->input_dev->mscbit); | |
1697 | if (dev->open) | |
1698 | dev->input_dev->open = ir_open; | |
1699 | if (dev->close) | |
1700 | dev->input_dev->close = ir_close; | |
1701 | ||
7ff2c2bc AS |
1702 | /* |
1703 | * Default delay of 250ms is too short for some protocols, especially | |
1704 | * since the timeout is currently set to 250ms. Increase it to 500ms, | |
1705 | * to avoid wrong repetition of the keycodes. Note that this must be | |
1706 | * set after the call to input_register_device(). | |
1707 | */ | |
1708 | dev->input_dev->rep[REP_DELAY] = 500; | |
1709 | ||
1710 | /* | |
1711 | * As a repeat event on protocols like RC-5 and NEC take as long as | |
1712 | * 110/114ms, using 33ms as a repeat period is not the right thing | |
1713 | * to do. | |
1714 | */ | |
1715 | dev->input_dev->rep[REP_PERIOD] = 125; | |
1716 | ||
1717 | dev->input_dev->dev.parent = &dev->dev; | |
1718 | memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id)); | |
1719 | dev->input_dev->phys = dev->input_phys; | |
1720 | dev->input_dev->name = dev->input_name; | |
1721 | ||
1722 | /* rc_open will be called here */ | |
1723 | rc = input_register_device(dev->input_dev); | |
1724 | if (rc) | |
1725 | goto out_table; | |
1726 | ||
1727 | return 0; | |
1728 | ||
1729 | out_table: | |
1730 | ir_free_table(&dev->rc_map); | |
1731 | ||
1732 | return rc; | |
1733 | } | |
1734 | ||
1735 | static void rc_free_rx_device(struct rc_dev *dev) | |
1736 | { | |
d34aee10 | 1737 | if (!dev || dev->driver_type == RC_DRIVER_IR_RAW_TX) |
7ff2c2bc AS |
1738 | return; |
1739 | ||
1740 | ir_free_table(&dev->rc_map); | |
1741 | ||
1742 | input_unregister_device(dev->input_dev); | |
1743 | dev->input_dev = NULL; | |
1744 | } | |
1745 | ||
1746 | int rc_register_device(struct rc_dev *dev) | |
1747 | { | |
1748 | static bool raw_init; /* 'false' default value, raw decoders loaded? */ | |
1749 | const char *path; | |
1750 | int attr = 0; | |
1751 | int minor; | |
1752 | int rc; | |
1753 | ||
1754 | if (!dev) | |
1755 | return -EINVAL; | |
1756 | ||
fcb13097 DH |
1757 | minor = ida_simple_get(&rc_ida, 0, RC_DEV_MAX, GFP_KERNEL); |
1758 | if (minor < 0) | |
1759 | return minor; | |
1760 | ||
1761 | dev->minor = minor; | |
1762 | dev_set_name(&dev->dev, "rc%u", dev->minor); | |
1763 | dev_set_drvdata(&dev->dev, dev); | |
078600f5 | 1764 | atomic_set(&dev->initialized, 0); |
587d1b06 | 1765 | |
99b0f3c9 | 1766 | dev->dev.groups = dev->sysfs_groups; |
d34aee10 AS |
1767 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) |
1768 | dev->sysfs_groups[attr++] = &rc_dev_protocol_attr_grp; | |
99b0f3c9 | 1769 | if (dev->s_filter) |
120703f9 | 1770 | dev->sysfs_groups[attr++] = &rc_dev_filter_attr_grp; |
99b0f3c9 DH |
1771 | if (dev->s_wakeup_filter) |
1772 | dev->sysfs_groups[attr++] = &rc_dev_wakeup_filter_attr_grp; | |
99b0f3c9 DH |
1773 | dev->sysfs_groups[attr++] = NULL; |
1774 | ||
d8b4b582 DH |
1775 | rc = device_add(&dev->dev); |
1776 | if (rc) | |
08aeb7c9 | 1777 | goto out_unlock; |
bc2a6c57 | 1778 | |
d8b4b582 | 1779 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
4dc0e908 HK |
1780 | dev_info(&dev->dev, "%s as %s\n", |
1781 | dev->input_name ?: "Unspecified device", path ?: "N/A"); | |
bc2a6c57 MCC |
1782 | kfree(path); |
1783 | ||
d34aee10 AS |
1784 | if (dev->driver_type == RC_DRIVER_IR_RAW || |
1785 | dev->driver_type == RC_DRIVER_IR_RAW_TX) { | |
5da6e984 | 1786 | if (!raw_init) { |
c1500ba0 | 1787 | request_module_nowait("ir-lirc-codec"); |
5da6e984 EG |
1788 | raw_init = true; |
1789 | } | |
d8b4b582 DH |
1790 | rc = ir_raw_event_register(dev); |
1791 | if (rc < 0) | |
5df62771 SY |
1792 | goto out_dev; |
1793 | } | |
1794 | ||
1795 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { | |
1796 | rc = rc_setup_rx_device(dev); | |
1797 | if (rc) | |
1798 | goto out_raw; | |
d8b4b582 DH |
1799 | } |
1800 | ||
078600f5 | 1801 | /* Allow the RC sysfs nodes to be accessible */ |
078600f5 | 1802 | atomic_set(&dev->initialized, 1); |
0528f354 | 1803 | |
7ff2c2bc | 1804 | IR_dprintk(1, "Registered rc%u (driver: %s)\n", |
fcb13097 | 1805 | dev->minor, |
7ff2c2bc | 1806 | dev->driver_name ? dev->driver_name : "unknown"); |
d8b4b582 | 1807 | |
bc2a6c57 | 1808 | return 0; |
d8b4b582 | 1809 | |
5df62771 SY |
1810 | out_raw: |
1811 | ir_raw_event_unregister(dev); | |
d8b4b582 DH |
1812 | out_dev: |
1813 | device_del(&dev->dev); | |
08aeb7c9 | 1814 | out_unlock: |
fcb13097 | 1815 | ida_simple_remove(&rc_ida, minor); |
d8b4b582 | 1816 | return rc; |
bc2a6c57 | 1817 | } |
d8b4b582 | 1818 | EXPORT_SYMBOL_GPL(rc_register_device); |
bc2a6c57 | 1819 | |
ddbf7d5a HK |
1820 | static void devm_rc_release(struct device *dev, void *res) |
1821 | { | |
1822 | rc_unregister_device(*(struct rc_dev **)res); | |
1823 | } | |
1824 | ||
1825 | int devm_rc_register_device(struct device *parent, struct rc_dev *dev) | |
1826 | { | |
1827 | struct rc_dev **dr; | |
1828 | int ret; | |
1829 | ||
1830 | dr = devres_alloc(devm_rc_release, sizeof(*dr), GFP_KERNEL); | |
1831 | if (!dr) | |
1832 | return -ENOMEM; | |
1833 | ||
1834 | ret = rc_register_device(dev); | |
1835 | if (ret) { | |
1836 | devres_free(dr); | |
1837 | return ret; | |
1838 | } | |
1839 | ||
1840 | *dr = dev; | |
1841 | devres_add(parent, dr); | |
1842 | ||
1843 | return 0; | |
1844 | } | |
1845 | EXPORT_SYMBOL_GPL(devm_rc_register_device); | |
1846 | ||
d8b4b582 | 1847 | void rc_unregister_device(struct rc_dev *dev) |
bc2a6c57 | 1848 | { |
d8b4b582 DH |
1849 | if (!dev) |
1850 | return; | |
bc2a6c57 | 1851 | |
d8b4b582 | 1852 | del_timer_sync(&dev->timer_keyup); |
bc2a6c57 | 1853 | |
d8b4b582 DH |
1854 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1855 | ir_raw_event_unregister(dev); | |
1856 | ||
7ff2c2bc | 1857 | rc_free_rx_device(dev); |
d8b4b582 | 1858 | |
b05681b9 | 1859 | device_del(&dev->dev); |
d8b4b582 | 1860 | |
fcb13097 DH |
1861 | ida_simple_remove(&rc_ida, dev->minor); |
1862 | ||
ddbf7d5a HK |
1863 | if (!dev->managed_alloc) |
1864 | rc_free_device(dev); | |
bc2a6c57 | 1865 | } |
b05681b9 | 1866 | |
d8b4b582 | 1867 | EXPORT_SYMBOL_GPL(rc_unregister_device); |
bc2a6c57 MCC |
1868 | |
1869 | /* | |
1870 | * Init/exit code for the module. Basically, creates/removes /sys/class/rc | |
1871 | */ | |
1872 | ||
6bda9644 | 1873 | static int __init rc_core_init(void) |
bc2a6c57 | 1874 | { |
40fc5325 | 1875 | int rc = class_register(&rc_class); |
bc2a6c57 | 1876 | if (rc) { |
d3d96820 | 1877 | pr_err("rc_core: unable to register rc class\n"); |
bc2a6c57 MCC |
1878 | return rc; |
1879 | } | |
1880 | ||
153a60bb | 1881 | led_trigger_register_simple("rc-feedback", &led_feedback); |
d100e659 | 1882 | rc_map_register(&empty_map); |
bc2a6c57 MCC |
1883 | |
1884 | return 0; | |
1885 | } | |
1886 | ||
6bda9644 | 1887 | static void __exit rc_core_exit(void) |
bc2a6c57 | 1888 | { |
40fc5325 | 1889 | class_unregister(&rc_class); |
153a60bb | 1890 | led_trigger_unregister_simple(led_feedback); |
d100e659 | 1891 | rc_map_unregister(&empty_map); |
bc2a6c57 MCC |
1892 | } |
1893 | ||
e76d4ce4 | 1894 | subsys_initcall(rc_core_init); |
6bda9644 | 1895 | module_exit(rc_core_exit); |
bc2a6c57 | 1896 | |
6bda9644 MCC |
1897 | int rc_core_debug; /* ir_debug level (0,1,2) */ |
1898 | EXPORT_SYMBOL_GPL(rc_core_debug); | |
1899 | module_param_named(debug, rc_core_debug, int, 0644); | |
446e4a64 | 1900 | |
37e59f87 | 1901 | MODULE_AUTHOR("Mauro Carvalho Chehab"); |
446e4a64 | 1902 | MODULE_LICENSE("GPL"); |