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Commit | Line | Data |
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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> |
631493ec MCC |
18 | #include <linux/spinlock.h> |
19 | #include <linux/delay.h> | |
882ead32 | 20 | #include <linux/input.h> |
153a60bb | 21 | #include <linux/leds.h> |
5a0e3ad6 | 22 | #include <linux/slab.h> |
fcb13097 | 23 | #include <linux/idr.h> |
bc2a6c57 | 24 | #include <linux/device.h> |
7a707b89 | 25 | #include <linux/module.h> |
f62de675 | 26 | #include "rc-core-priv.h" |
ef53a115 | 27 | |
b3074c0a DH |
28 | /* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */ |
29 | #define IR_TAB_MIN_SIZE 256 | |
30 | #define IR_TAB_MAX_SIZE 8192 | |
fcb13097 | 31 | #define RC_DEV_MAX 256 |
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 | |
fcb13097 DH |
41 | /* Used to keep track of rc devices */ |
42 | static DEFINE_IDA(rc_ida); | |
43 | ||
d100e659 | 44 | static struct rc_map_list *seek_rc_map(const char *name) |
631493ec | 45 | { |
d100e659 | 46 | struct rc_map_list *map = NULL; |
631493ec MCC |
47 | |
48 | spin_lock(&rc_map_lock); | |
49 | list_for_each_entry(map, &rc_map_list, list) { | |
50 | if (!strcmp(name, map->map.name)) { | |
51 | spin_unlock(&rc_map_lock); | |
52 | return map; | |
53 | } | |
54 | } | |
55 | spin_unlock(&rc_map_lock); | |
56 | ||
57 | return NULL; | |
58 | } | |
59 | ||
d100e659 | 60 | struct rc_map *rc_map_get(const char *name) |
631493ec MCC |
61 | { |
62 | ||
d100e659 | 63 | struct rc_map_list *map; |
631493ec MCC |
64 | |
65 | map = seek_rc_map(name); | |
2ff56fad | 66 | #ifdef CONFIG_MODULES |
631493ec | 67 | if (!map) { |
8ea5488a | 68 | int rc = request_module("%s", name); |
631493ec | 69 | if (rc < 0) { |
d3d96820 | 70 | pr_err("Couldn't load IR keymap %s\n", name); |
631493ec MCC |
71 | return NULL; |
72 | } | |
73 | msleep(20); /* Give some time for IR to register */ | |
74 | ||
75 | map = seek_rc_map(name); | |
76 | } | |
77 | #endif | |
78 | if (!map) { | |
d3d96820 | 79 | pr_err("IR keymap %s not found\n", name); |
631493ec MCC |
80 | return NULL; |
81 | } | |
82 | ||
83 | printk(KERN_INFO "Registered IR keymap %s\n", map->map.name); | |
84 | ||
85 | return &map->map; | |
86 | } | |
d100e659 | 87 | EXPORT_SYMBOL_GPL(rc_map_get); |
631493ec | 88 | |
d100e659 | 89 | int rc_map_register(struct rc_map_list *map) |
631493ec MCC |
90 | { |
91 | spin_lock(&rc_map_lock); | |
92 | list_add_tail(&map->list, &rc_map_list); | |
93 | spin_unlock(&rc_map_lock); | |
94 | return 0; | |
95 | } | |
d100e659 | 96 | EXPORT_SYMBOL_GPL(rc_map_register); |
631493ec | 97 | |
d100e659 | 98 | void rc_map_unregister(struct rc_map_list *map) |
631493ec MCC |
99 | { |
100 | spin_lock(&rc_map_lock); | |
101 | list_del(&map->list); | |
102 | spin_unlock(&rc_map_lock); | |
103 | } | |
d100e659 | 104 | EXPORT_SYMBOL_GPL(rc_map_unregister); |
631493ec MCC |
105 | |
106 | ||
2f4f58d6 | 107 | static struct rc_map_table empty[] = { |
631493ec MCC |
108 | { 0x2a, KEY_COFFEE }, |
109 | }; | |
110 | ||
d100e659 | 111 | static struct rc_map_list empty_map = { |
631493ec MCC |
112 | .map = { |
113 | .scan = empty, | |
114 | .size = ARRAY_SIZE(empty), | |
52b66144 | 115 | .rc_type = RC_TYPE_UNKNOWN, /* Legacy IR type */ |
631493ec MCC |
116 | .name = RC_MAP_EMPTY, |
117 | } | |
118 | }; | |
119 | ||
9f470095 DT |
120 | /** |
121 | * ir_create_table() - initializes a scancode table | |
b088ba65 | 122 | * @rc_map: the rc_map to initialize |
9f470095 | 123 | * @name: name to assign to the table |
52b66144 | 124 | * @rc_type: ir type to assign to the new table |
9f470095 DT |
125 | * @size: initial size of the table |
126 | * @return: zero on success or a negative error code | |
127 | * | |
b088ba65 | 128 | * This routine will initialize the rc_map and will allocate |
d8b4b582 | 129 | * memory to hold at least the specified number of elements. |
9f470095 | 130 | */ |
b088ba65 | 131 | static int ir_create_table(struct rc_map *rc_map, |
52b66144 | 132 | const char *name, u64 rc_type, size_t size) |
9f470095 | 133 | { |
d54fc3bb HV |
134 | rc_map->name = kstrdup(name, GFP_KERNEL); |
135 | if (!rc_map->name) | |
136 | return -ENOMEM; | |
b088ba65 | 137 | rc_map->rc_type = rc_type; |
2f4f58d6 MCC |
138 | rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table)); |
139 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); | |
b088ba65 | 140 | rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL); |
d54fc3bb HV |
141 | if (!rc_map->scan) { |
142 | kfree(rc_map->name); | |
143 | rc_map->name = NULL; | |
9f470095 | 144 | return -ENOMEM; |
d54fc3bb | 145 | } |
9f470095 DT |
146 | |
147 | IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", | |
b088ba65 | 148 | rc_map->size, rc_map->alloc); |
9f470095 DT |
149 | return 0; |
150 | } | |
151 | ||
152 | /** | |
153 | * ir_free_table() - frees memory allocated by a scancode table | |
b088ba65 | 154 | * @rc_map: the table whose mappings need to be freed |
9f470095 DT |
155 | * |
156 | * This routine will free memory alloctaed for key mappings used by given | |
157 | * scancode table. | |
158 | */ | |
b088ba65 | 159 | static void ir_free_table(struct rc_map *rc_map) |
9f470095 | 160 | { |
b088ba65 | 161 | rc_map->size = 0; |
d54fc3bb | 162 | kfree(rc_map->name); |
c183d358 | 163 | rc_map->name = NULL; |
b088ba65 MCC |
164 | kfree(rc_map->scan); |
165 | rc_map->scan = NULL; | |
9f470095 DT |
166 | } |
167 | ||
7fee03e4 | 168 | /** |
b3074c0a | 169 | * ir_resize_table() - resizes a scancode table if necessary |
b088ba65 | 170 | * @rc_map: the rc_map to resize |
9f470095 | 171 | * @gfp_flags: gfp flags to use when allocating memory |
b3074c0a | 172 | * @return: zero on success or a negative error code |
7fee03e4 | 173 | * |
b088ba65 | 174 | * This routine will shrink the rc_map if it has lots of |
b3074c0a | 175 | * unused entries and grow it if it is full. |
7fee03e4 | 176 | */ |
b088ba65 | 177 | static int ir_resize_table(struct rc_map *rc_map, gfp_t gfp_flags) |
7fee03e4 | 178 | { |
b088ba65 | 179 | unsigned int oldalloc = rc_map->alloc; |
b3074c0a | 180 | unsigned int newalloc = oldalloc; |
2f4f58d6 MCC |
181 | struct rc_map_table *oldscan = rc_map->scan; |
182 | struct rc_map_table *newscan; | |
b3074c0a | 183 | |
b088ba65 | 184 | if (rc_map->size == rc_map->len) { |
b3074c0a | 185 | /* All entries in use -> grow keytable */ |
b088ba65 | 186 | if (rc_map->alloc >= IR_TAB_MAX_SIZE) |
b3074c0a | 187 | return -ENOMEM; |
7fee03e4 | 188 | |
b3074c0a DH |
189 | newalloc *= 2; |
190 | IR_dprintk(1, "Growing table to %u bytes\n", newalloc); | |
191 | } | |
7fee03e4 | 192 | |
b088ba65 | 193 | if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) { |
b3074c0a DH |
194 | /* Less than 1/3 of entries in use -> shrink keytable */ |
195 | newalloc /= 2; | |
196 | IR_dprintk(1, "Shrinking table to %u bytes\n", newalloc); | |
197 | } | |
7fee03e4 | 198 | |
b3074c0a DH |
199 | if (newalloc == oldalloc) |
200 | return 0; | |
7fee03e4 | 201 | |
9f470095 | 202 | newscan = kmalloc(newalloc, gfp_flags); |
b3074c0a DH |
203 | if (!newscan) { |
204 | IR_dprintk(1, "Failed to kmalloc %u bytes\n", newalloc); | |
205 | return -ENOMEM; | |
206 | } | |
7fee03e4 | 207 | |
2f4f58d6 | 208 | memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table)); |
b088ba65 MCC |
209 | rc_map->scan = newscan; |
210 | rc_map->alloc = newalloc; | |
2f4f58d6 | 211 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); |
b3074c0a DH |
212 | kfree(oldscan); |
213 | return 0; | |
7fee03e4 MCC |
214 | } |
215 | ||
f6fc5049 | 216 | /** |
9f470095 | 217 | * ir_update_mapping() - set a keycode in the scancode->keycode table |
d8b4b582 | 218 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 219 | * @rc_map: scancode table to be adjusted |
9f470095 DT |
220 | * @index: index of the mapping that needs to be updated |
221 | * @keycode: the desired keycode | |
222 | * @return: previous keycode assigned to the mapping | |
223 | * | |
d8b4b582 | 224 | * This routine is used to update scancode->keycode mapping at given |
9f470095 DT |
225 | * position. |
226 | */ | |
d8b4b582 | 227 | static unsigned int ir_update_mapping(struct rc_dev *dev, |
b088ba65 | 228 | struct rc_map *rc_map, |
9f470095 DT |
229 | unsigned int index, |
230 | unsigned int new_keycode) | |
231 | { | |
b088ba65 | 232 | int old_keycode = rc_map->scan[index].keycode; |
9f470095 DT |
233 | int i; |
234 | ||
235 | /* Did the user wish to remove the mapping? */ | |
236 | if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) { | |
237 | IR_dprintk(1, "#%d: Deleting scan 0x%04x\n", | |
b088ba65 MCC |
238 | index, rc_map->scan[index].scancode); |
239 | rc_map->len--; | |
240 | memmove(&rc_map->scan[index], &rc_map->scan[index+ 1], | |
2f4f58d6 | 241 | (rc_map->len - index) * sizeof(struct rc_map_table)); |
9f470095 DT |
242 | } else { |
243 | IR_dprintk(1, "#%d: %s scan 0x%04x with key 0x%04x\n", | |
244 | index, | |
245 | old_keycode == KEY_RESERVED ? "New" : "Replacing", | |
b088ba65 MCC |
246 | rc_map->scan[index].scancode, new_keycode); |
247 | rc_map->scan[index].keycode = new_keycode; | |
d8b4b582 | 248 | __set_bit(new_keycode, dev->input_dev->keybit); |
9f470095 DT |
249 | } |
250 | ||
251 | if (old_keycode != KEY_RESERVED) { | |
252 | /* A previous mapping was updated... */ | |
d8b4b582 | 253 | __clear_bit(old_keycode, dev->input_dev->keybit); |
9f470095 | 254 | /* ... but another scancode might use the same keycode */ |
b088ba65 MCC |
255 | for (i = 0; i < rc_map->len; i++) { |
256 | if (rc_map->scan[i].keycode == old_keycode) { | |
d8b4b582 | 257 | __set_bit(old_keycode, dev->input_dev->keybit); |
9f470095 DT |
258 | break; |
259 | } | |
260 | } | |
261 | ||
262 | /* Possibly shrink the keytable, failure is not a problem */ | |
b088ba65 | 263 | ir_resize_table(rc_map, GFP_ATOMIC); |
9f470095 DT |
264 | } |
265 | ||
266 | return old_keycode; | |
267 | } | |
268 | ||
269 | /** | |
4c7b355d | 270 | * ir_establish_scancode() - set a keycode in the scancode->keycode table |
d8b4b582 | 271 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 272 | * @rc_map: scancode table to be searched |
9f470095 DT |
273 | * @scancode: the desired scancode |
274 | * @resize: controls whether we allowed to resize the table to | |
25985edc | 275 | * accommodate not yet present scancodes |
9f470095 DT |
276 | * @return: index of the mapping containing scancode in question |
277 | * or -1U in case of failure. | |
f6fc5049 | 278 | * |
b088ba65 | 279 | * This routine is used to locate given scancode in rc_map. |
9f470095 DT |
280 | * If scancode is not yet present the routine will allocate a new slot |
281 | * for it. | |
f6fc5049 | 282 | */ |
d8b4b582 | 283 | static unsigned int ir_establish_scancode(struct rc_dev *dev, |
b088ba65 | 284 | struct rc_map *rc_map, |
9f470095 DT |
285 | unsigned int scancode, |
286 | bool resize) | |
f6fc5049 | 287 | { |
b3074c0a | 288 | unsigned int i; |
9dfe4e83 MCC |
289 | |
290 | /* | |
291 | * Unfortunately, some hardware-based IR decoders don't provide | |
292 | * all bits for the complete IR code. In general, they provide only | |
293 | * the command part of the IR code. Yet, as it is possible to replace | |
294 | * the provided IR with another one, it is needed to allow loading | |
d8b4b582 DH |
295 | * IR tables from other remotes. So, we support specifying a mask to |
296 | * indicate the valid bits of the scancodes. | |
9dfe4e83 | 297 | */ |
9d2f1d3c DH |
298 | if (dev->scancode_mask) |
299 | scancode &= dev->scancode_mask; | |
b3074c0a DH |
300 | |
301 | /* First check if we already have a mapping for this ir command */ | |
b088ba65 MCC |
302 | for (i = 0; i < rc_map->len; i++) { |
303 | if (rc_map->scan[i].scancode == scancode) | |
9f470095 DT |
304 | return i; |
305 | ||
b3074c0a | 306 | /* Keytable is sorted from lowest to highest scancode */ |
b088ba65 | 307 | if (rc_map->scan[i].scancode >= scancode) |
b3074c0a | 308 | break; |
b3074c0a | 309 | } |
f6fc5049 | 310 | |
9f470095 | 311 | /* No previous mapping found, we might need to grow the table */ |
b088ba65 MCC |
312 | if (rc_map->size == rc_map->len) { |
313 | if (!resize || ir_resize_table(rc_map, GFP_ATOMIC)) | |
9f470095 DT |
314 | return -1U; |
315 | } | |
35438946 | 316 | |
9f470095 | 317 | /* i is the proper index to insert our new keycode */ |
b088ba65 MCC |
318 | if (i < rc_map->len) |
319 | memmove(&rc_map->scan[i + 1], &rc_map->scan[i], | |
2f4f58d6 | 320 | (rc_map->len - i) * sizeof(struct rc_map_table)); |
b088ba65 MCC |
321 | rc_map->scan[i].scancode = scancode; |
322 | rc_map->scan[i].keycode = KEY_RESERVED; | |
323 | rc_map->len++; | |
f6fc5049 | 324 | |
9f470095 | 325 | return i; |
f6fc5049 MCC |
326 | } |
327 | ||
ef53a115 | 328 | /** |
b3074c0a | 329 | * ir_setkeycode() - set a keycode in the scancode->keycode table |
d8b4b582 | 330 | * @idev: the struct input_dev device descriptor |
ef53a115 | 331 | * @scancode: the desired scancode |
b3074c0a DH |
332 | * @keycode: result |
333 | * @return: -EINVAL if the keycode could not be inserted, otherwise zero. | |
ef53a115 | 334 | * |
b3074c0a | 335 | * This routine is used to handle evdev EVIOCSKEY ioctl. |
ef53a115 | 336 | */ |
d8b4b582 | 337 | static int ir_setkeycode(struct input_dev *idev, |
9f470095 DT |
338 | const struct input_keymap_entry *ke, |
339 | unsigned int *old_keycode) | |
ef53a115 | 340 | { |
d8b4b582 | 341 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 342 | struct rc_map *rc_map = &rdev->rc_map; |
9f470095 DT |
343 | unsigned int index; |
344 | unsigned int scancode; | |
dea8a39f | 345 | int retval = 0; |
9f470095 | 346 | unsigned long flags; |
ef53a115 | 347 | |
b088ba65 | 348 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
349 | |
350 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
351 | index = ke->index; | |
b088ba65 | 352 | if (index >= rc_map->len) { |
9f470095 DT |
353 | retval = -EINVAL; |
354 | goto out; | |
355 | } | |
356 | } else { | |
357 | retval = input_scancode_to_scalar(ke, &scancode); | |
358 | if (retval) | |
359 | goto out; | |
360 | ||
b088ba65 MCC |
361 | index = ir_establish_scancode(rdev, rc_map, scancode, true); |
362 | if (index >= rc_map->len) { | |
9f470095 DT |
363 | retval = -ENOMEM; |
364 | goto out; | |
365 | } | |
366 | } | |
367 | ||
b088ba65 | 368 | *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode); |
9f470095 DT |
369 | |
370 | out: | |
b088ba65 | 371 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 372 | return retval; |
e97f4677 MCC |
373 | } |
374 | ||
375 | /** | |
b3074c0a | 376 | * ir_setkeytable() - sets several entries in the scancode->keycode table |
d8b4b582 | 377 | * @dev: the struct rc_dev device descriptor |
b088ba65 MCC |
378 | * @to: the struct rc_map to copy entries to |
379 | * @from: the struct rc_map to copy entries from | |
9f470095 | 380 | * @return: -ENOMEM if all keycodes could not be inserted, otherwise zero. |
e97f4677 | 381 | * |
b3074c0a | 382 | * This routine is used to handle table initialization. |
e97f4677 | 383 | */ |
d8b4b582 | 384 | static int ir_setkeytable(struct rc_dev *dev, |
b088ba65 | 385 | const struct rc_map *from) |
e97f4677 | 386 | { |
b088ba65 | 387 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
388 | unsigned int i, index; |
389 | int rc; | |
390 | ||
b088ba65 | 391 | rc = ir_create_table(rc_map, from->name, |
52b66144 | 392 | from->rc_type, from->size); |
9f470095 DT |
393 | if (rc) |
394 | return rc; | |
395 | ||
396 | IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", | |
b088ba65 | 397 | rc_map->size, rc_map->alloc); |
e97f4677 | 398 | |
b3074c0a | 399 | for (i = 0; i < from->size; i++) { |
b088ba65 | 400 | index = ir_establish_scancode(dev, rc_map, |
9f470095 | 401 | from->scan[i].scancode, false); |
b088ba65 | 402 | if (index >= rc_map->len) { |
9f470095 | 403 | rc = -ENOMEM; |
b3074c0a | 404 | break; |
9f470095 DT |
405 | } |
406 | ||
b088ba65 | 407 | ir_update_mapping(dev, rc_map, index, |
9f470095 | 408 | from->scan[i].keycode); |
e97f4677 | 409 | } |
9f470095 DT |
410 | |
411 | if (rc) | |
b088ba65 | 412 | ir_free_table(rc_map); |
9f470095 | 413 | |
b3074c0a | 414 | return rc; |
ef53a115 MCC |
415 | } |
416 | ||
9f470095 DT |
417 | /** |
418 | * ir_lookup_by_scancode() - locate mapping by scancode | |
b088ba65 | 419 | * @rc_map: the struct rc_map to search |
9f470095 DT |
420 | * @scancode: scancode to look for in the table |
421 | * @return: index in the table, -1U if not found | |
422 | * | |
423 | * This routine performs binary search in RC keykeymap table for | |
424 | * given scancode. | |
425 | */ | |
b088ba65 | 426 | static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map, |
9f470095 DT |
427 | unsigned int scancode) |
428 | { | |
0d07025e | 429 | int start = 0; |
b088ba65 | 430 | int end = rc_map->len - 1; |
0d07025e | 431 | int mid; |
9f470095 DT |
432 | |
433 | while (start <= end) { | |
434 | mid = (start + end) / 2; | |
b088ba65 | 435 | if (rc_map->scan[mid].scancode < scancode) |
9f470095 | 436 | start = mid + 1; |
b088ba65 | 437 | else if (rc_map->scan[mid].scancode > scancode) |
9f470095 DT |
438 | end = mid - 1; |
439 | else | |
440 | return mid; | |
441 | } | |
442 | ||
443 | return -1U; | |
444 | } | |
445 | ||
ef53a115 | 446 | /** |
b3074c0a | 447 | * ir_getkeycode() - get a keycode from the scancode->keycode table |
d8b4b582 | 448 | * @idev: the struct input_dev device descriptor |
ef53a115 | 449 | * @scancode: the desired scancode |
b3074c0a DH |
450 | * @keycode: used to return the keycode, if found, or KEY_RESERVED |
451 | * @return: always returns zero. | |
ef53a115 | 452 | * |
b3074c0a | 453 | * This routine is used to handle evdev EVIOCGKEY ioctl. |
ef53a115 | 454 | */ |
d8b4b582 | 455 | static int ir_getkeycode(struct input_dev *idev, |
9f470095 | 456 | struct input_keymap_entry *ke) |
ef53a115 | 457 | { |
d8b4b582 | 458 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 459 | struct rc_map *rc_map = &rdev->rc_map; |
2f4f58d6 | 460 | struct rc_map_table *entry; |
9f470095 DT |
461 | unsigned long flags; |
462 | unsigned int index; | |
463 | unsigned int scancode; | |
464 | int retval; | |
ef53a115 | 465 | |
b088ba65 | 466 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
467 | |
468 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
469 | index = ke->index; | |
470 | } else { | |
471 | retval = input_scancode_to_scalar(ke, &scancode); | |
472 | if (retval) | |
473 | goto out; | |
474 | ||
b088ba65 | 475 | index = ir_lookup_by_scancode(rc_map, scancode); |
9f470095 DT |
476 | } |
477 | ||
54e74b87 DT |
478 | if (index < rc_map->len) { |
479 | entry = &rc_map->scan[index]; | |
480 | ||
481 | ke->index = index; | |
482 | ke->keycode = entry->keycode; | |
483 | ke->len = sizeof(entry->scancode); | |
484 | memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode)); | |
485 | ||
486 | } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) { | |
487 | /* | |
488 | * We do not really know the valid range of scancodes | |
489 | * so let's respond with KEY_RESERVED to anything we | |
490 | * do not have mapping for [yet]. | |
491 | */ | |
492 | ke->index = index; | |
493 | ke->keycode = KEY_RESERVED; | |
494 | } else { | |
9f470095 DT |
495 | retval = -EINVAL; |
496 | goto out; | |
e97f4677 MCC |
497 | } |
498 | ||
47c5ba53 DT |
499 | retval = 0; |
500 | ||
9f470095 | 501 | out: |
b088ba65 | 502 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 503 | return retval; |
ef53a115 MCC |
504 | } |
505 | ||
506 | /** | |
ca86674b | 507 | * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode |
d8b4b582 DH |
508 | * @dev: the struct rc_dev descriptor of the device |
509 | * @scancode: the scancode to look for | |
510 | * @return: the corresponding keycode, or KEY_RESERVED | |
ef53a115 | 511 | * |
d8b4b582 DH |
512 | * This routine is used by drivers which need to convert a scancode to a |
513 | * keycode. Normally it should not be used since drivers should have no | |
514 | * interest in keycodes. | |
ef53a115 | 515 | */ |
ca86674b | 516 | u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode) |
ef53a115 | 517 | { |
b088ba65 | 518 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
519 | unsigned int keycode; |
520 | unsigned int index; | |
521 | unsigned long flags; | |
522 | ||
b088ba65 | 523 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 | 524 | |
b088ba65 MCC |
525 | index = ir_lookup_by_scancode(rc_map, scancode); |
526 | keycode = index < rc_map->len ? | |
527 | rc_map->scan[index].keycode : KEY_RESERVED; | |
9f470095 | 528 | |
b088ba65 | 529 | spin_unlock_irqrestore(&rc_map->lock, flags); |
ef53a115 | 530 | |
35438946 MCC |
531 | if (keycode != KEY_RESERVED) |
532 | IR_dprintk(1, "%s: scancode 0x%04x keycode 0x%02x\n", | |
d8b4b582 | 533 | dev->input_name, scancode, keycode); |
9f470095 | 534 | |
b3074c0a | 535 | return keycode; |
ef53a115 | 536 | } |
ca86674b | 537 | EXPORT_SYMBOL_GPL(rc_g_keycode_from_table); |
ef53a115 | 538 | |
6660de56 | 539 | /** |
62c65031 | 540 | * ir_do_keyup() - internal function to signal the release of a keypress |
d8b4b582 | 541 | * @dev: the struct rc_dev descriptor of the device |
98c32bcd | 542 | * @sync: whether or not to call input_sync |
6660de56 | 543 | * |
62c65031 DH |
544 | * This function is used internally to release a keypress, it must be |
545 | * called with keylock held. | |
a374fef4 | 546 | */ |
98c32bcd | 547 | static void ir_do_keyup(struct rc_dev *dev, bool sync) |
a374fef4 | 548 | { |
d8b4b582 | 549 | if (!dev->keypressed) |
a374fef4 DH |
550 | return; |
551 | ||
d8b4b582 DH |
552 | IR_dprintk(1, "keyup key 0x%04x\n", dev->last_keycode); |
553 | input_report_key(dev->input_dev, dev->last_keycode, 0); | |
153a60bb | 554 | led_trigger_event(led_feedback, LED_OFF); |
98c32bcd JW |
555 | if (sync) |
556 | input_sync(dev->input_dev); | |
d8b4b582 | 557 | dev->keypressed = false; |
a374fef4 | 558 | } |
62c65031 DH |
559 | |
560 | /** | |
ca86674b | 561 | * rc_keyup() - signals the release of a keypress |
d8b4b582 | 562 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
563 | * |
564 | * This routine is used to signal that a key has been released on the | |
565 | * remote control. | |
566 | */ | |
ca86674b | 567 | void rc_keyup(struct rc_dev *dev) |
62c65031 DH |
568 | { |
569 | unsigned long flags; | |
62c65031 | 570 | |
d8b4b582 | 571 | spin_lock_irqsave(&dev->keylock, flags); |
98c32bcd | 572 | ir_do_keyup(dev, true); |
d8b4b582 | 573 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 574 | } |
ca86674b | 575 | EXPORT_SYMBOL_GPL(rc_keyup); |
a374fef4 DH |
576 | |
577 | /** | |
578 | * ir_timer_keyup() - generates a keyup event after a timeout | |
d8b4b582 | 579 | * @cookie: a pointer to the struct rc_dev for the device |
a374fef4 DH |
580 | * |
581 | * This routine will generate a keyup event some time after a keydown event | |
582 | * is generated when no further activity has been detected. | |
6660de56 | 583 | */ |
a374fef4 | 584 | static void ir_timer_keyup(unsigned long cookie) |
6660de56 | 585 | { |
d8b4b582 | 586 | struct rc_dev *dev = (struct rc_dev *)cookie; |
a374fef4 DH |
587 | unsigned long flags; |
588 | ||
589 | /* | |
590 | * ir->keyup_jiffies is used to prevent a race condition if a | |
591 | * hardware interrupt occurs at this point and the keyup timer | |
592 | * event is moved further into the future as a result. | |
593 | * | |
594 | * The timer will then be reactivated and this function called | |
595 | * again in the future. We need to exit gracefully in that case | |
596 | * to allow the input subsystem to do its auto-repeat magic or | |
597 | * a keyup event might follow immediately after the keydown. | |
598 | */ | |
d8b4b582 DH |
599 | spin_lock_irqsave(&dev->keylock, flags); |
600 | if (time_is_before_eq_jiffies(dev->keyup_jiffies)) | |
98c32bcd | 601 | ir_do_keyup(dev, true); |
d8b4b582 | 602 | spin_unlock_irqrestore(&dev->keylock, flags); |
a374fef4 DH |
603 | } |
604 | ||
605 | /** | |
ca86674b | 606 | * rc_repeat() - signals that a key is still pressed |
d8b4b582 | 607 | * @dev: the struct rc_dev descriptor of the device |
a374fef4 DH |
608 | * |
609 | * This routine is used by IR decoders when a repeat message which does | |
610 | * not include the necessary bits to reproduce the scancode has been | |
611 | * received. | |
612 | */ | |
ca86674b | 613 | void rc_repeat(struct rc_dev *dev) |
a374fef4 DH |
614 | { |
615 | unsigned long flags; | |
6660de56 | 616 | |
d8b4b582 | 617 | spin_lock_irqsave(&dev->keylock, flags); |
a374fef4 | 618 | |
d8b4b582 | 619 | if (!dev->keypressed) |
a374fef4 | 620 | goto out; |
6660de56 | 621 | |
265a2988 DH |
622 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode); |
623 | input_sync(dev->input_dev); | |
624 | ||
d8b4b582 DH |
625 | dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); |
626 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
a374fef4 DH |
627 | |
628 | out: | |
d8b4b582 | 629 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 630 | } |
ca86674b | 631 | EXPORT_SYMBOL_GPL(rc_repeat); |
6660de56 MCC |
632 | |
633 | /** | |
62c65031 | 634 | * ir_do_keydown() - internal function to process a keypress |
d8b4b582 | 635 | * @dev: the struct rc_dev descriptor of the device |
120703f9 | 636 | * @protocol: the protocol of the keypress |
62c65031 DH |
637 | * @scancode: the scancode of the keypress |
638 | * @keycode: the keycode of the keypress | |
639 | * @toggle: the toggle value of the keypress | |
6660de56 | 640 | * |
62c65031 DH |
641 | * This function is used internally to register a keypress, it must be |
642 | * called with keylock held. | |
6660de56 | 643 | */ |
120703f9 DH |
644 | static void ir_do_keydown(struct rc_dev *dev, enum rc_type protocol, |
645 | u32 scancode, u32 keycode, u8 toggle) | |
6660de56 | 646 | { |
99b0f3c9 | 647 | bool new_event = (!dev->keypressed || |
120703f9 | 648 | dev->last_protocol != protocol || |
99b0f3c9 | 649 | dev->last_scancode != scancode || |
120703f9 | 650 | dev->last_toggle != toggle); |
6660de56 | 651 | |
98c32bcd JW |
652 | if (new_event && dev->keypressed) |
653 | ir_do_keyup(dev, false); | |
6660de56 | 654 | |
98c32bcd | 655 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode); |
a374fef4 | 656 | |
98c32bcd JW |
657 | if (new_event && keycode != KEY_RESERVED) { |
658 | /* Register a keypress */ | |
659 | dev->keypressed = true; | |
120703f9 | 660 | dev->last_protocol = protocol; |
98c32bcd JW |
661 | dev->last_scancode = scancode; |
662 | dev->last_toggle = toggle; | |
663 | dev->last_keycode = keycode; | |
664 | ||
25ec587c | 665 | IR_dprintk(1, "%s: key down event, key 0x%04x, protocol 0x%04x, scancode 0x%08x\n", |
120703f9 | 666 | dev->input_name, keycode, protocol, scancode); |
98c32bcd | 667 | input_report_key(dev->input_dev, keycode, 1); |
70a2f912 JH |
668 | |
669 | led_trigger_event(led_feedback, LED_FULL); | |
98c32bcd | 670 | } |
ed4d3876 | 671 | |
d8b4b582 | 672 | input_sync(dev->input_dev); |
62c65031 | 673 | } |
6660de56 | 674 | |
62c65031 | 675 | /** |
ca86674b | 676 | * rc_keydown() - generates input event for a key press |
d8b4b582 | 677 | * @dev: the struct rc_dev descriptor of the device |
120703f9 DH |
678 | * @protocol: the protocol for the keypress |
679 | * @scancode: the scancode for the keypress | |
62c65031 DH |
680 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't |
681 | * support toggle values, this should be set to zero) | |
682 | * | |
d8b4b582 DH |
683 | * This routine is used to signal that a key has been pressed on the |
684 | * remote control. | |
62c65031 | 685 | */ |
120703f9 | 686 | void rc_keydown(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle) |
62c65031 DH |
687 | { |
688 | unsigned long flags; | |
ca86674b | 689 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 690 | |
d8b4b582 | 691 | spin_lock_irqsave(&dev->keylock, flags); |
120703f9 | 692 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); |
62c65031 | 693 | |
d8b4b582 DH |
694 | if (dev->keypressed) { |
695 | dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); | |
696 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
62c65031 | 697 | } |
d8b4b582 | 698 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 699 | } |
ca86674b | 700 | EXPORT_SYMBOL_GPL(rc_keydown); |
6660de56 | 701 | |
62c65031 | 702 | /** |
ca86674b | 703 | * rc_keydown_notimeout() - generates input event for a key press without |
62c65031 | 704 | * an automatic keyup event at a later time |
d8b4b582 | 705 | * @dev: the struct rc_dev descriptor of the device |
120703f9 DH |
706 | * @protocol: the protocol for the keypress |
707 | * @scancode: the scancode for the keypress | |
62c65031 DH |
708 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't |
709 | * support toggle values, this should be set to zero) | |
710 | * | |
d8b4b582 | 711 | * This routine is used to signal that a key has been pressed on the |
ca86674b | 712 | * remote control. The driver must manually call rc_keyup() at a later stage. |
62c65031 | 713 | */ |
120703f9 DH |
714 | void rc_keydown_notimeout(struct rc_dev *dev, enum rc_type protocol, |
715 | u32 scancode, u8 toggle) | |
62c65031 DH |
716 | { |
717 | unsigned long flags; | |
ca86674b | 718 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 719 | |
d8b4b582 | 720 | spin_lock_irqsave(&dev->keylock, flags); |
120703f9 | 721 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); |
d8b4b582 | 722 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 723 | } |
ca86674b | 724 | EXPORT_SYMBOL_GPL(rc_keydown_notimeout); |
62c65031 | 725 | |
b590c0bf SY |
726 | /** |
727 | * rc_validate_filter() - checks that the scancode and mask are valid and | |
728 | * provides sensible defaults | |
f423ccc1 | 729 | * @dev: the struct rc_dev descriptor of the device |
b590c0bf SY |
730 | * @filter: the scancode and mask |
731 | * @return: 0 or -EINVAL if the filter is not valid | |
732 | */ | |
f423ccc1 | 733 | static int rc_validate_filter(struct rc_dev *dev, |
b590c0bf SY |
734 | struct rc_scancode_filter *filter) |
735 | { | |
736 | static u32 masks[] = { | |
737 | [RC_TYPE_RC5] = 0x1f7f, | |
738 | [RC_TYPE_RC5X_20] = 0x1f7f3f, | |
739 | [RC_TYPE_RC5_SZ] = 0x2fff, | |
740 | [RC_TYPE_SONY12] = 0x1f007f, | |
741 | [RC_TYPE_SONY15] = 0xff007f, | |
742 | [RC_TYPE_SONY20] = 0x1fff7f, | |
743 | [RC_TYPE_JVC] = 0xffff, | |
744 | [RC_TYPE_NEC] = 0xffff, | |
745 | [RC_TYPE_NECX] = 0xffffff, | |
746 | [RC_TYPE_NEC32] = 0xffffffff, | |
747 | [RC_TYPE_SANYO] = 0x1fffff, | |
b73bc16d SY |
748 | [RC_TYPE_MCIR2_KBD] = 0xffff, |
749 | [RC_TYPE_MCIR2_MSE] = 0x1fffff, | |
b590c0bf SY |
750 | [RC_TYPE_RC6_0] = 0xffff, |
751 | [RC_TYPE_RC6_6A_20] = 0xfffff, | |
752 | [RC_TYPE_RC6_6A_24] = 0xffffff, | |
753 | [RC_TYPE_RC6_6A_32] = 0xffffffff, | |
754 | [RC_TYPE_RC6_MCE] = 0xffff7fff, | |
755 | [RC_TYPE_SHARP] = 0x1fff, | |
756 | }; | |
757 | u32 s = filter->data; | |
f423ccc1 | 758 | enum rc_type protocol = dev->wakeup_protocol; |
b590c0bf SY |
759 | |
760 | switch (protocol) { | |
761 | case RC_TYPE_NECX: | |
762 | if ((((s >> 16) ^ ~(s >> 8)) & 0xff) == 0) | |
763 | return -EINVAL; | |
764 | break; | |
765 | case RC_TYPE_NEC32: | |
766 | if ((((s >> 24) ^ ~(s >> 16)) & 0xff) == 0) | |
767 | return -EINVAL; | |
768 | break; | |
769 | case RC_TYPE_RC6_MCE: | |
770 | if ((s & 0xffff0000) != 0x800f0000) | |
771 | return -EINVAL; | |
772 | break; | |
773 | case RC_TYPE_RC6_6A_32: | |
774 | if ((s & 0xffff0000) == 0x800f0000) | |
775 | return -EINVAL; | |
776 | break; | |
777 | default: | |
778 | break; | |
779 | } | |
780 | ||
781 | filter->data &= masks[protocol]; | |
782 | filter->mask &= masks[protocol]; | |
783 | ||
f423ccc1 JH |
784 | /* |
785 | * If we have to raw encode the IR for wakeup, we cannot have a mask | |
786 | */ | |
787 | if (dev->encode_wakeup && | |
788 | filter->mask != 0 && filter->mask != masks[protocol]) | |
789 | return -EINVAL; | |
790 | ||
b590c0bf SY |
791 | return 0; |
792 | } | |
793 | ||
8b2ff320 SK |
794 | int rc_open(struct rc_dev *rdev) |
795 | { | |
796 | int rval = 0; | |
797 | ||
798 | if (!rdev) | |
799 | return -EINVAL; | |
800 | ||
801 | mutex_lock(&rdev->lock); | |
c73bbaa4 | 802 | |
f02dcdd1 | 803 | if (!rdev->users++ && rdev->open != NULL) |
8b2ff320 SK |
804 | rval = rdev->open(rdev); |
805 | ||
806 | if (rval) | |
807 | rdev->users--; | |
808 | ||
809 | mutex_unlock(&rdev->lock); | |
810 | ||
811 | return rval; | |
812 | } | |
813 | EXPORT_SYMBOL_GPL(rc_open); | |
814 | ||
d8b4b582 | 815 | static int ir_open(struct input_dev *idev) |
ef53a115 | 816 | { |
d8b4b582 | 817 | struct rc_dev *rdev = input_get_drvdata(idev); |
75543cce | 818 | |
8b2ff320 SK |
819 | return rc_open(rdev); |
820 | } | |
821 | ||
822 | void rc_close(struct rc_dev *rdev) | |
823 | { | |
824 | if (rdev) { | |
825 | mutex_lock(&rdev->lock); | |
826 | ||
81b7d14e | 827 | if (!--rdev->users && rdev->close != NULL) |
8b2ff320 SK |
828 | rdev->close(rdev); |
829 | ||
830 | mutex_unlock(&rdev->lock); | |
831 | } | |
ef53a115 | 832 | } |
8b2ff320 | 833 | EXPORT_SYMBOL_GPL(rc_close); |
d4b778d3 | 834 | |
d8b4b582 | 835 | static void ir_close(struct input_dev *idev) |
f6fc5049 | 836 | { |
d8b4b582 | 837 | struct rc_dev *rdev = input_get_drvdata(idev); |
8b2ff320 | 838 | rc_close(rdev); |
f6fc5049 | 839 | } |
f6fc5049 | 840 | |
bc2a6c57 | 841 | /* class for /sys/class/rc */ |
40fc5325 | 842 | static char *rc_devnode(struct device *dev, umode_t *mode) |
bc2a6c57 MCC |
843 | { |
844 | return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev)); | |
845 | } | |
846 | ||
40fc5325 | 847 | static struct class rc_class = { |
bc2a6c57 | 848 | .name = "rc", |
40fc5325 | 849 | .devnode = rc_devnode, |
bc2a6c57 MCC |
850 | }; |
851 | ||
c003ab1b DH |
852 | /* |
853 | * These are the protocol textual descriptions that are | |
854 | * used by the sysfs protocols file. Note that the order | |
855 | * of the entries is relevant. | |
856 | */ | |
53df8777 | 857 | static const struct { |
bc2a6c57 | 858 | u64 type; |
53df8777 | 859 | const char *name; |
9f0bf366 | 860 | const char *module_name; |
bc2a6c57 | 861 | } proto_names[] = { |
9f0bf366 HK |
862 | { RC_BIT_NONE, "none", NULL }, |
863 | { RC_BIT_OTHER, "other", NULL }, | |
864 | { RC_BIT_UNKNOWN, "unknown", NULL }, | |
c003ab1b | 865 | { RC_BIT_RC5 | |
0fcd3f0a | 866 | RC_BIT_RC5X_20, "rc-5", "ir-rc5-decoder" }, |
2ceeca04 SY |
867 | { RC_BIT_NEC | |
868 | RC_BIT_NECX | | |
869 | RC_BIT_NEC32, "nec", "ir-nec-decoder" }, | |
c003ab1b DH |
870 | { RC_BIT_RC6_0 | |
871 | RC_BIT_RC6_6A_20 | | |
872 | RC_BIT_RC6_6A_24 | | |
873 | RC_BIT_RC6_6A_32 | | |
9f0bf366 HK |
874 | RC_BIT_RC6_MCE, "rc-6", "ir-rc6-decoder" }, |
875 | { RC_BIT_JVC, "jvc", "ir-jvc-decoder" }, | |
c003ab1b DH |
876 | { RC_BIT_SONY12 | |
877 | RC_BIT_SONY15 | | |
9f0bf366 HK |
878 | RC_BIT_SONY20, "sony", "ir-sony-decoder" }, |
879 | { RC_BIT_RC5_SZ, "rc-5-sz", "ir-rc5-decoder" }, | |
880 | { RC_BIT_SANYO, "sanyo", "ir-sanyo-decoder" }, | |
881 | { RC_BIT_SHARP, "sharp", "ir-sharp-decoder" }, | |
b73bc16d SY |
882 | { RC_BIT_MCIR2_KBD | |
883 | RC_BIT_MCIR2_MSE, "mce_kbd", "ir-mce_kbd-decoder" }, | |
9f0bf366 | 884 | { RC_BIT_XMP, "xmp", "ir-xmp-decoder" }, |
ff42c8aa | 885 | { RC_BIT_CEC, "cec", NULL }, |
bc2a6c57 MCC |
886 | }; |
887 | ||
bc2a6c57 | 888 | /** |
ab88c66d JH |
889 | * struct rc_filter_attribute - Device attribute relating to a filter type. |
890 | * @attr: Device attribute. | |
891 | * @type: Filter type. | |
892 | * @mask: false for filter value, true for filter mask. | |
893 | */ | |
894 | struct rc_filter_attribute { | |
895 | struct device_attribute attr; | |
896 | enum rc_filter_type type; | |
897 | bool mask; | |
898 | }; | |
899 | #define to_rc_filter_attr(a) container_of(a, struct rc_filter_attribute, attr) | |
900 | ||
ab88c66d JH |
901 | #define RC_FILTER_ATTR(_name, _mode, _show, _store, _type, _mask) \ |
902 | struct rc_filter_attribute dev_attr_##_name = { \ | |
903 | .attr = __ATTR(_name, _mode, _show, _store), \ | |
904 | .type = (_type), \ | |
905 | .mask = (_mask), \ | |
906 | } | |
907 | ||
dd6ff6a0 DH |
908 | static bool lirc_is_present(void) |
909 | { | |
910 | #if defined(CONFIG_LIRC_MODULE) | |
911 | struct module *lirc; | |
912 | ||
913 | mutex_lock(&module_mutex); | |
914 | lirc = find_module("lirc_dev"); | |
915 | mutex_unlock(&module_mutex); | |
916 | ||
917 | return lirc ? true : false; | |
918 | #elif defined(CONFIG_LIRC) | |
919 | return true; | |
920 | #else | |
921 | return false; | |
922 | #endif | |
923 | } | |
924 | ||
ab88c66d | 925 | /** |
0751d33c | 926 | * show_protocols() - shows the current IR protocol(s) |
d8b4b582 | 927 | * @device: the device descriptor |
da6e162d | 928 | * @mattr: the device attribute struct |
bc2a6c57 MCC |
929 | * @buf: a pointer to the output buffer |
930 | * | |
931 | * This routine is a callback routine for input read the IR protocol type(s). | |
0751d33c | 932 | * it is trigged by reading /sys/class/rc/rc?/protocols. |
bc2a6c57 MCC |
933 | * It returns the protocol names of supported protocols. |
934 | * Enabled protocols are printed in brackets. | |
08aeb7c9 | 935 | * |
18726a34 DH |
936 | * dev->lock is taken to guard against races between |
937 | * store_protocols and show_protocols. | |
bc2a6c57 | 938 | */ |
d8b4b582 | 939 | static ssize_t show_protocols(struct device *device, |
bc2a6c57 MCC |
940 | struct device_attribute *mattr, char *buf) |
941 | { | |
d8b4b582 | 942 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 MCC |
943 | u64 allowed, enabled; |
944 | char *tmp = buf; | |
945 | int i; | |
946 | ||
08aeb7c9 JW |
947 | mutex_lock(&dev->lock); |
948 | ||
0751d33c SY |
949 | enabled = dev->enabled_protocols; |
950 | allowed = dev->allowed_protocols; | |
951 | if (dev->raw && !allowed) | |
952 | allowed = ir_raw_get_allowed_protocols(); | |
bc2a6c57 | 953 | |
da6e162d DH |
954 | mutex_unlock(&dev->lock); |
955 | ||
956 | IR_dprintk(1, "%s: allowed - 0x%llx, enabled - 0x%llx\n", | |
957 | __func__, (long long)allowed, (long long)enabled); | |
bc2a6c57 MCC |
958 | |
959 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
960 | if (allowed & enabled & proto_names[i].type) | |
961 | tmp += sprintf(tmp, "[%s] ", proto_names[i].name); | |
962 | else if (allowed & proto_names[i].type) | |
963 | tmp += sprintf(tmp, "%s ", proto_names[i].name); | |
c003ab1b DH |
964 | |
965 | if (allowed & proto_names[i].type) | |
966 | allowed &= ~proto_names[i].type; | |
bc2a6c57 MCC |
967 | } |
968 | ||
dd6ff6a0 | 969 | if (dev->driver_type == RC_DRIVER_IR_RAW && lirc_is_present()) |
275ddb40 DH |
970 | tmp += sprintf(tmp, "[lirc] "); |
971 | ||
bc2a6c57 MCC |
972 | if (tmp != buf) |
973 | tmp--; | |
974 | *tmp = '\n'; | |
08aeb7c9 | 975 | |
bc2a6c57 MCC |
976 | return tmp + 1 - buf; |
977 | } | |
978 | ||
979 | /** | |
da6e162d DH |
980 | * parse_protocol_change() - parses a protocol change request |
981 | * @protocols: pointer to the bitmask of current protocols | |
982 | * @buf: pointer to the buffer with a list of changes | |
bc2a6c57 | 983 | * |
da6e162d DH |
984 | * Writing "+proto" will add a protocol to the protocol mask. |
985 | * Writing "-proto" will remove a protocol from protocol mask. | |
bc2a6c57 MCC |
986 | * Writing "proto" will enable only "proto". |
987 | * Writing "none" will disable all protocols. | |
da6e162d | 988 | * Returns the number of changes performed or a negative error code. |
bc2a6c57 | 989 | */ |
da6e162d | 990 | static int parse_protocol_change(u64 *protocols, const char *buf) |
bc2a6c57 | 991 | { |
bc2a6c57 | 992 | const char *tmp; |
da6e162d DH |
993 | unsigned count = 0; |
994 | bool enable, disable; | |
bc2a6c57 | 995 | u64 mask; |
da6e162d | 996 | int i; |
bc2a6c57 | 997 | |
da6e162d | 998 | while ((tmp = strsep((char **)&buf, " \n")) != NULL) { |
bc2a6c57 MCC |
999 | if (!*tmp) |
1000 | break; | |
1001 | ||
1002 | if (*tmp == '+') { | |
1003 | enable = true; | |
1004 | disable = false; | |
1005 | tmp++; | |
1006 | } else if (*tmp == '-') { | |
1007 | enable = false; | |
1008 | disable = true; | |
1009 | tmp++; | |
1010 | } else { | |
1011 | enable = false; | |
1012 | disable = false; | |
1013 | } | |
1014 | ||
c003ab1b DH |
1015 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { |
1016 | if (!strcasecmp(tmp, proto_names[i].name)) { | |
1017 | mask = proto_names[i].type; | |
1018 | break; | |
bc2a6c57 | 1019 | } |
bc2a6c57 MCC |
1020 | } |
1021 | ||
c003ab1b | 1022 | if (i == ARRAY_SIZE(proto_names)) { |
275ddb40 DH |
1023 | if (!strcasecmp(tmp, "lirc")) |
1024 | mask = 0; | |
1025 | else { | |
1026 | IR_dprintk(1, "Unknown protocol: '%s'\n", tmp); | |
1027 | return -EINVAL; | |
1028 | } | |
c003ab1b DH |
1029 | } |
1030 | ||
1031 | count++; | |
1032 | ||
bc2a6c57 | 1033 | if (enable) |
da6e162d | 1034 | *protocols |= mask; |
bc2a6c57 | 1035 | else if (disable) |
da6e162d | 1036 | *protocols &= ~mask; |
bc2a6c57 | 1037 | else |
da6e162d | 1038 | *protocols = mask; |
bc2a6c57 MCC |
1039 | } |
1040 | ||
1041 | if (!count) { | |
1042 | IR_dprintk(1, "Protocol not specified\n"); | |
da6e162d DH |
1043 | return -EINVAL; |
1044 | } | |
1045 | ||
1046 | return count; | |
1047 | } | |
1048 | ||
9f0bf366 | 1049 | static void ir_raw_load_modules(u64 *protocols) |
9f0bf366 HK |
1050 | { |
1051 | u64 available; | |
1052 | int i, ret; | |
1053 | ||
1054 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
1055 | if (proto_names[i].type == RC_BIT_NONE || | |
1056 | proto_names[i].type & (RC_BIT_OTHER | RC_BIT_UNKNOWN)) | |
1057 | continue; | |
1058 | ||
1059 | available = ir_raw_get_allowed_protocols(); | |
1060 | if (!(*protocols & proto_names[i].type & ~available)) | |
1061 | continue; | |
1062 | ||
1063 | if (!proto_names[i].module_name) { | |
1064 | pr_err("Can't enable IR protocol %s\n", | |
1065 | proto_names[i].name); | |
1066 | *protocols &= ~proto_names[i].type; | |
1067 | continue; | |
1068 | } | |
1069 | ||
1070 | ret = request_module("%s", proto_names[i].module_name); | |
1071 | if (ret < 0) { | |
1072 | pr_err("Couldn't load IR protocol module %s\n", | |
1073 | proto_names[i].module_name); | |
1074 | *protocols &= ~proto_names[i].type; | |
1075 | continue; | |
1076 | } | |
1077 | msleep(20); | |
1078 | available = ir_raw_get_allowed_protocols(); | |
1079 | if (!(*protocols & proto_names[i].type & ~available)) | |
1080 | continue; | |
1081 | ||
8caebcdc | 1082 | pr_err("Loaded IR protocol module %s, but protocol %s still not available\n", |
9f0bf366 HK |
1083 | proto_names[i].module_name, |
1084 | proto_names[i].name); | |
1085 | *protocols &= ~proto_names[i].type; | |
1086 | } | |
1087 | } | |
1088 | ||
da6e162d DH |
1089 | /** |
1090 | * store_protocols() - changes the current/wakeup IR protocol(s) | |
1091 | * @device: the device descriptor | |
1092 | * @mattr: the device attribute struct | |
1093 | * @buf: a pointer to the input buffer | |
1094 | * @len: length of the input buffer | |
1095 | * | |
1096 | * This routine is for changing the IR protocol type. | |
1097 | * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]protocols. | |
1098 | * See parse_protocol_change() for the valid commands. | |
1099 | * Returns @len on success or a negative error code. | |
1100 | * | |
18726a34 DH |
1101 | * dev->lock is taken to guard against races between |
1102 | * store_protocols and show_protocols. | |
da6e162d DH |
1103 | */ |
1104 | static ssize_t store_protocols(struct device *device, | |
1105 | struct device_attribute *mattr, | |
1106 | const char *buf, size_t len) | |
1107 | { | |
1108 | struct rc_dev *dev = to_rc_dev(device); | |
da6e162d | 1109 | u64 *current_protocols; |
da6e162d | 1110 | struct rc_scancode_filter *filter; |
da6e162d DH |
1111 | u64 old_protocols, new_protocols; |
1112 | ssize_t rc; | |
1113 | ||
0751d33c SY |
1114 | IR_dprintk(1, "Normal protocol change requested\n"); |
1115 | current_protocols = &dev->enabled_protocols; | |
1116 | filter = &dev->scancode_filter; | |
da6e162d | 1117 | |
0751d33c | 1118 | if (!dev->change_protocol) { |
da6e162d DH |
1119 | IR_dprintk(1, "Protocol switching not supported\n"); |
1120 | return -EINVAL; | |
1121 | } | |
1122 | ||
1123 | mutex_lock(&dev->lock); | |
1124 | ||
1125 | old_protocols = *current_protocols; | |
1126 | new_protocols = old_protocols; | |
1127 | rc = parse_protocol_change(&new_protocols, buf); | |
1128 | if (rc < 0) | |
1129 | goto out; | |
1130 | ||
0751d33c | 1131 | rc = dev->change_protocol(dev, &new_protocols); |
da6e162d DH |
1132 | if (rc < 0) { |
1133 | IR_dprintk(1, "Error setting protocols to 0x%llx\n", | |
1134 | (long long)new_protocols); | |
08aeb7c9 | 1135 | goto out; |
bc2a6c57 MCC |
1136 | } |
1137 | ||
9f0bf366 HK |
1138 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1139 | ir_raw_load_modules(&new_protocols); | |
1140 | ||
983c5bd2 JH |
1141 | if (new_protocols != old_protocols) { |
1142 | *current_protocols = new_protocols; | |
1143 | IR_dprintk(1, "Protocols changed to 0x%llx\n", | |
1144 | (long long)new_protocols); | |
bc2a6c57 MCC |
1145 | } |
1146 | ||
6bea25af | 1147 | /* |
983c5bd2 JH |
1148 | * If a protocol change was attempted the filter may need updating, even |
1149 | * if the actual protocol mask hasn't changed (since the driver may have | |
1150 | * cleared the filter). | |
6bea25af JH |
1151 | * Try setting the same filter with the new protocol (if any). |
1152 | * Fall back to clearing the filter. | |
1153 | */ | |
0751d33c | 1154 | if (dev->s_filter && filter->mask) { |
da6e162d | 1155 | if (new_protocols) |
0751d33c | 1156 | rc = dev->s_filter(dev, filter); |
da6e162d DH |
1157 | else |
1158 | rc = -1; | |
6bea25af | 1159 | |
da6e162d DH |
1160 | if (rc < 0) { |
1161 | filter->data = 0; | |
1162 | filter->mask = 0; | |
0751d33c | 1163 | dev->s_filter(dev, filter); |
da6e162d | 1164 | } |
6bea25af JH |
1165 | } |
1166 | ||
da6e162d | 1167 | rc = len; |
08aeb7c9 JW |
1168 | |
1169 | out: | |
1170 | mutex_unlock(&dev->lock); | |
da6e162d | 1171 | return rc; |
bc2a6c57 MCC |
1172 | } |
1173 | ||
00942d1a JH |
1174 | /** |
1175 | * show_filter() - shows the current scancode filter value or mask | |
1176 | * @device: the device descriptor | |
1177 | * @attr: the device attribute struct | |
1178 | * @buf: a pointer to the output buffer | |
1179 | * | |
1180 | * This routine is a callback routine to read a scancode filter value or mask. | |
1181 | * It is trigged by reading /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1182 | * It prints the current scancode filter value or mask of the appropriate filter | |
1183 | * type in hexadecimal into @buf and returns the size of the buffer. | |
1184 | * | |
1185 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1186 | * compared against input scancodes and non-matching scancodes are discarded. | |
1187 | * | |
18726a34 | 1188 | * dev->lock is taken to guard against races between |
00942d1a JH |
1189 | * store_filter and show_filter. |
1190 | */ | |
1191 | static ssize_t show_filter(struct device *device, | |
1192 | struct device_attribute *attr, | |
1193 | char *buf) | |
1194 | { | |
1195 | struct rc_dev *dev = to_rc_dev(device); | |
1196 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
da6e162d | 1197 | struct rc_scancode_filter *filter; |
00942d1a JH |
1198 | u32 val; |
1199 | ||
c73bbaa4 | 1200 | mutex_lock(&dev->lock); |
c73bbaa4 | 1201 | |
da6e162d | 1202 | if (fattr->type == RC_FILTER_NORMAL) |
c5540fbb | 1203 | filter = &dev->scancode_filter; |
da6e162d | 1204 | else |
c5540fbb | 1205 | filter = &dev->scancode_wakeup_filter; |
da6e162d | 1206 | |
da6e162d DH |
1207 | if (fattr->mask) |
1208 | val = filter->mask; | |
00942d1a | 1209 | else |
da6e162d | 1210 | val = filter->data; |
00942d1a JH |
1211 | mutex_unlock(&dev->lock); |
1212 | ||
1213 | return sprintf(buf, "%#x\n", val); | |
1214 | } | |
1215 | ||
1216 | /** | |
1217 | * store_filter() - changes the scancode filter value | |
1218 | * @device: the device descriptor | |
1219 | * @attr: the device attribute struct | |
1220 | * @buf: a pointer to the input buffer | |
1221 | * @len: length of the input buffer | |
1222 | * | |
1223 | * This routine is for changing a scancode filter value or mask. | |
1224 | * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1225 | * Returns -EINVAL if an invalid filter value for the current protocol was | |
1226 | * specified or if scancode filtering is not supported by the driver, otherwise | |
1227 | * returns @len. | |
1228 | * | |
1229 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1230 | * compared against input scancodes and non-matching scancodes are discarded. | |
1231 | * | |
18726a34 | 1232 | * dev->lock is taken to guard against races between |
00942d1a JH |
1233 | * store_filter and show_filter. |
1234 | */ | |
1235 | static ssize_t store_filter(struct device *device, | |
1236 | struct device_attribute *attr, | |
da6e162d | 1237 | const char *buf, size_t len) |
00942d1a JH |
1238 | { |
1239 | struct rc_dev *dev = to_rc_dev(device); | |
1240 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
da6e162d | 1241 | struct rc_scancode_filter new_filter, *filter; |
00942d1a JH |
1242 | int ret; |
1243 | unsigned long val; | |
23c843b5 | 1244 | int (*set_filter)(struct rc_dev *dev, struct rc_scancode_filter *filter); |
00942d1a | 1245 | |
00942d1a JH |
1246 | ret = kstrtoul(buf, 0, &val); |
1247 | if (ret < 0) | |
1248 | return ret; | |
1249 | ||
da6e162d DH |
1250 | if (fattr->type == RC_FILTER_NORMAL) { |
1251 | set_filter = dev->s_filter; | |
c5540fbb | 1252 | filter = &dev->scancode_filter; |
da6e162d DH |
1253 | } else { |
1254 | set_filter = dev->s_wakeup_filter; | |
c5540fbb | 1255 | filter = &dev->scancode_wakeup_filter; |
da6e162d DH |
1256 | } |
1257 | ||
99b0f3c9 DH |
1258 | if (!set_filter) |
1259 | return -EINVAL; | |
00942d1a JH |
1260 | |
1261 | mutex_lock(&dev->lock); | |
1262 | ||
da6e162d | 1263 | new_filter = *filter; |
00942d1a | 1264 | if (fattr->mask) |
da6e162d | 1265 | new_filter.mask = val; |
00942d1a | 1266 | else |
da6e162d | 1267 | new_filter.data = val; |
23c843b5 | 1268 | |
0751d33c | 1269 | if (fattr->type == RC_FILTER_WAKEUP) { |
b590c0bf SY |
1270 | /* |
1271 | * Refuse to set a filter unless a protocol is enabled | |
1272 | * and the filter is valid for that protocol | |
1273 | */ | |
1274 | if (dev->wakeup_protocol != RC_TYPE_UNKNOWN) | |
f423ccc1 | 1275 | ret = rc_validate_filter(dev, &new_filter); |
b590c0bf | 1276 | else |
0751d33c | 1277 | ret = -EINVAL; |
b590c0bf SY |
1278 | |
1279 | if (ret != 0) | |
0751d33c | 1280 | goto unlock; |
0751d33c SY |
1281 | } |
1282 | ||
1283 | if (fattr->type == RC_FILTER_NORMAL && !dev->enabled_protocols && | |
1284 | val) { | |
6bea25af JH |
1285 | /* refuse to set a filter unless a protocol is enabled */ |
1286 | ret = -EINVAL; | |
1287 | goto unlock; | |
1288 | } | |
23c843b5 | 1289 | |
da6e162d | 1290 | ret = set_filter(dev, &new_filter); |
99b0f3c9 DH |
1291 | if (ret < 0) |
1292 | goto unlock; | |
00942d1a | 1293 | |
da6e162d | 1294 | *filter = new_filter; |
00942d1a JH |
1295 | |
1296 | unlock: | |
1297 | mutex_unlock(&dev->lock); | |
da6e162d | 1298 | return (ret < 0) ? ret : len; |
00942d1a JH |
1299 | } |
1300 | ||
0751d33c SY |
1301 | /* |
1302 | * This is the list of all variants of all protocols, which is used by | |
1303 | * the wakeup_protocols sysfs entry. In the protocols sysfs entry some | |
1304 | * some protocols are grouped together (e.g. nec = nec + necx + nec32). | |
1305 | * | |
1306 | * For wakeup we need to know the exact protocol variant so the hardware | |
1307 | * can be programmed exactly what to expect. | |
1308 | */ | |
1309 | static const char * const proto_variant_names[] = { | |
1310 | [RC_TYPE_UNKNOWN] = "unknown", | |
1311 | [RC_TYPE_OTHER] = "other", | |
1312 | [RC_TYPE_RC5] = "rc-5", | |
1313 | [RC_TYPE_RC5X_20] = "rc-5x-20", | |
1314 | [RC_TYPE_RC5_SZ] = "rc-5-sz", | |
1315 | [RC_TYPE_JVC] = "jvc", | |
1316 | [RC_TYPE_SONY12] = "sony-12", | |
1317 | [RC_TYPE_SONY15] = "sony-15", | |
1318 | [RC_TYPE_SONY20] = "sony-20", | |
1319 | [RC_TYPE_NEC] = "nec", | |
1320 | [RC_TYPE_NECX] = "nec-x", | |
1321 | [RC_TYPE_NEC32] = "nec-32", | |
1322 | [RC_TYPE_SANYO] = "sanyo", | |
b73bc16d SY |
1323 | [RC_TYPE_MCIR2_KBD] = "mcir2-kbd", |
1324 | [RC_TYPE_MCIR2_MSE] = "mcir2-mse", | |
0751d33c SY |
1325 | [RC_TYPE_RC6_0] = "rc-6-0", |
1326 | [RC_TYPE_RC6_6A_20] = "rc-6-6a-20", | |
1327 | [RC_TYPE_RC6_6A_24] = "rc-6-6a-24", | |
1328 | [RC_TYPE_RC6_6A_32] = "rc-6-6a-32", | |
1329 | [RC_TYPE_RC6_MCE] = "rc-6-mce", | |
1330 | [RC_TYPE_SHARP] = "sharp", | |
1331 | [RC_TYPE_XMP] = "xmp", | |
1332 | [RC_TYPE_CEC] = "cec", | |
1333 | }; | |
1334 | ||
1335 | /** | |
1336 | * show_wakeup_protocols() - shows the wakeup IR protocol | |
1337 | * @device: the device descriptor | |
1338 | * @mattr: the device attribute struct | |
1339 | * @buf: a pointer to the output buffer | |
1340 | * | |
1341 | * This routine is a callback routine for input read the IR protocol type(s). | |
1342 | * it is trigged by reading /sys/class/rc/rc?/wakeup_protocols. | |
1343 | * It returns the protocol names of supported protocols. | |
1344 | * The enabled protocols are printed in brackets. | |
1345 | * | |
18726a34 DH |
1346 | * dev->lock is taken to guard against races between |
1347 | * store_wakeup_protocols and show_wakeup_protocols. | |
0751d33c SY |
1348 | */ |
1349 | static ssize_t show_wakeup_protocols(struct device *device, | |
1350 | struct device_attribute *mattr, | |
1351 | char *buf) | |
1352 | { | |
1353 | struct rc_dev *dev = to_rc_dev(device); | |
1354 | u64 allowed; | |
1355 | enum rc_type enabled; | |
1356 | char *tmp = buf; | |
1357 | int i; | |
1358 | ||
0751d33c SY |
1359 | mutex_lock(&dev->lock); |
1360 | ||
1361 | allowed = dev->allowed_wakeup_protocols; | |
1362 | enabled = dev->wakeup_protocol; | |
1363 | ||
1364 | mutex_unlock(&dev->lock); | |
1365 | ||
1366 | IR_dprintk(1, "%s: allowed - 0x%llx, enabled - %d\n", | |
1367 | __func__, (long long)allowed, enabled); | |
1368 | ||
1369 | for (i = 0; i < ARRAY_SIZE(proto_variant_names); i++) { | |
1370 | if (allowed & (1ULL << i)) { | |
1371 | if (i == enabled) | |
1372 | tmp += sprintf(tmp, "[%s] ", | |
1373 | proto_variant_names[i]); | |
1374 | else | |
1375 | tmp += sprintf(tmp, "%s ", | |
1376 | proto_variant_names[i]); | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | if (tmp != buf) | |
1381 | tmp--; | |
1382 | *tmp = '\n'; | |
1383 | ||
1384 | return tmp + 1 - buf; | |
1385 | } | |
1386 | ||
1387 | /** | |
1388 | * store_wakeup_protocols() - changes the wakeup IR protocol(s) | |
1389 | * @device: the device descriptor | |
1390 | * @mattr: the device attribute struct | |
1391 | * @buf: a pointer to the input buffer | |
1392 | * @len: length of the input buffer | |
1393 | * | |
1394 | * This routine is for changing the IR protocol type. | |
1395 | * It is trigged by writing to /sys/class/rc/rc?/wakeup_protocols. | |
1396 | * Returns @len on success or a negative error code. | |
1397 | * | |
18726a34 DH |
1398 | * dev->lock is taken to guard against races between |
1399 | * store_wakeup_protocols and show_wakeup_protocols. | |
0751d33c SY |
1400 | */ |
1401 | static ssize_t store_wakeup_protocols(struct device *device, | |
1402 | struct device_attribute *mattr, | |
1403 | const char *buf, size_t len) | |
1404 | { | |
1405 | struct rc_dev *dev = to_rc_dev(device); | |
1406 | enum rc_type protocol; | |
1407 | ssize_t rc; | |
1408 | u64 allowed; | |
1409 | int i; | |
1410 | ||
0751d33c SY |
1411 | mutex_lock(&dev->lock); |
1412 | ||
1413 | allowed = dev->allowed_wakeup_protocols; | |
1414 | ||
1415 | if (sysfs_streq(buf, "none")) { | |
1416 | protocol = RC_TYPE_UNKNOWN; | |
1417 | } else { | |
1418 | for (i = 0; i < ARRAY_SIZE(proto_variant_names); i++) { | |
1419 | if ((allowed & (1ULL << i)) && | |
1420 | sysfs_streq(buf, proto_variant_names[i])) { | |
1421 | protocol = i; | |
1422 | break; | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | if (i == ARRAY_SIZE(proto_variant_names)) { | |
1427 | rc = -EINVAL; | |
1428 | goto out; | |
1429 | } | |
f423ccc1 JH |
1430 | |
1431 | if (dev->encode_wakeup) { | |
1432 | u64 mask = 1ULL << protocol; | |
1433 | ||
1434 | ir_raw_load_modules(&mask); | |
1435 | if (!mask) { | |
1436 | rc = -EINVAL; | |
1437 | goto out; | |
1438 | } | |
1439 | } | |
0751d33c SY |
1440 | } |
1441 | ||
1442 | if (dev->wakeup_protocol != protocol) { | |
1443 | dev->wakeup_protocol = protocol; | |
1444 | IR_dprintk(1, "Wakeup protocol changed to %d\n", protocol); | |
1445 | ||
1446 | if (protocol == RC_TYPE_RC6_MCE) | |
1447 | dev->scancode_wakeup_filter.data = 0x800f0000; | |
1448 | else | |
1449 | dev->scancode_wakeup_filter.data = 0; | |
1450 | dev->scancode_wakeup_filter.mask = 0; | |
1451 | ||
1452 | rc = dev->s_wakeup_filter(dev, &dev->scancode_wakeup_filter); | |
1453 | if (rc == 0) | |
1454 | rc = len; | |
1455 | } else { | |
1456 | rc = len; | |
1457 | } | |
1458 | ||
1459 | out: | |
1460 | mutex_unlock(&dev->lock); | |
1461 | return rc; | |
1462 | } | |
1463 | ||
d8b4b582 DH |
1464 | static void rc_dev_release(struct device *device) |
1465 | { | |
47cae1e1 MK |
1466 | struct rc_dev *dev = to_rc_dev(device); |
1467 | ||
1468 | kfree(dev); | |
d8b4b582 DH |
1469 | } |
1470 | ||
bc2a6c57 MCC |
1471 | #define ADD_HOTPLUG_VAR(fmt, val...) \ |
1472 | do { \ | |
1473 | int err = add_uevent_var(env, fmt, val); \ | |
1474 | if (err) \ | |
1475 | return err; \ | |
1476 | } while (0) | |
1477 | ||
1478 | static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) | |
1479 | { | |
d8b4b582 | 1480 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 | 1481 | |
b088ba65 MCC |
1482 | if (dev->rc_map.name) |
1483 | ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name); | |
d8b4b582 DH |
1484 | if (dev->driver_name) |
1485 | ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name); | |
bc2a6c57 MCC |
1486 | |
1487 | return 0; | |
1488 | } | |
1489 | ||
1490 | /* | |
1491 | * Static device attribute struct with the sysfs attributes for IR's | |
1492 | */ | |
0751d33c SY |
1493 | static DEVICE_ATTR(protocols, 0644, show_protocols, store_protocols); |
1494 | static DEVICE_ATTR(wakeup_protocols, 0644, show_wakeup_protocols, | |
1495 | store_wakeup_protocols); | |
00942d1a JH |
1496 | static RC_FILTER_ATTR(filter, S_IRUGO|S_IWUSR, |
1497 | show_filter, store_filter, RC_FILTER_NORMAL, false); | |
1498 | static RC_FILTER_ATTR(filter_mask, S_IRUGO|S_IWUSR, | |
1499 | show_filter, store_filter, RC_FILTER_NORMAL, true); | |
1500 | static RC_FILTER_ATTR(wakeup_filter, S_IRUGO|S_IWUSR, | |
1501 | show_filter, store_filter, RC_FILTER_WAKEUP, false); | |
1502 | static RC_FILTER_ATTR(wakeup_filter_mask, S_IRUGO|S_IWUSR, | |
1503 | show_filter, store_filter, RC_FILTER_WAKEUP, true); | |
bc2a6c57 | 1504 | |
99b0f3c9 | 1505 | static struct attribute *rc_dev_protocol_attrs[] = { |
0751d33c | 1506 | &dev_attr_protocols.attr, |
99b0f3c9 DH |
1507 | NULL, |
1508 | }; | |
1509 | ||
1510 | static struct attribute_group rc_dev_protocol_attr_grp = { | |
1511 | .attrs = rc_dev_protocol_attrs, | |
1512 | }; | |
1513 | ||
99b0f3c9 | 1514 | static struct attribute *rc_dev_filter_attrs[] = { |
00942d1a JH |
1515 | &dev_attr_filter.attr.attr, |
1516 | &dev_attr_filter_mask.attr.attr, | |
bc2a6c57 MCC |
1517 | NULL, |
1518 | }; | |
1519 | ||
99b0f3c9 DH |
1520 | static struct attribute_group rc_dev_filter_attr_grp = { |
1521 | .attrs = rc_dev_filter_attrs, | |
bc2a6c57 MCC |
1522 | }; |
1523 | ||
99b0f3c9 DH |
1524 | static struct attribute *rc_dev_wakeup_filter_attrs[] = { |
1525 | &dev_attr_wakeup_filter.attr.attr, | |
1526 | &dev_attr_wakeup_filter_mask.attr.attr, | |
0751d33c | 1527 | &dev_attr_wakeup_protocols.attr, |
99b0f3c9 DH |
1528 | NULL, |
1529 | }; | |
1530 | ||
1531 | static struct attribute_group rc_dev_wakeup_filter_attr_grp = { | |
1532 | .attrs = rc_dev_wakeup_filter_attrs, | |
bc2a6c57 MCC |
1533 | }; |
1534 | ||
1535 | static struct device_type rc_dev_type = { | |
d8b4b582 | 1536 | .release = rc_dev_release, |
bc2a6c57 MCC |
1537 | .uevent = rc_dev_uevent, |
1538 | }; | |
1539 | ||
0f7499fd | 1540 | struct rc_dev *rc_allocate_device(enum rc_driver_type type) |
bc2a6c57 | 1541 | { |
d8b4b582 | 1542 | struct rc_dev *dev; |
bc2a6c57 | 1543 | |
d8b4b582 DH |
1544 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1545 | if (!dev) | |
1546 | return NULL; | |
1547 | ||
d34aee10 AS |
1548 | if (type != RC_DRIVER_IR_RAW_TX) { |
1549 | dev->input_dev = input_allocate_device(); | |
1550 | if (!dev->input_dev) { | |
1551 | kfree(dev); | |
1552 | return NULL; | |
1553 | } | |
1554 | ||
1555 | dev->input_dev->getkeycode = ir_getkeycode; | |
1556 | dev->input_dev->setkeycode = ir_setkeycode; | |
1557 | input_set_drvdata(dev->input_dev, dev); | |
d8b4b582 | 1558 | |
d34aee10 AS |
1559 | setup_timer(&dev->timer_keyup, ir_timer_keyup, |
1560 | (unsigned long)dev); | |
d8b4b582 | 1561 | |
d34aee10 AS |
1562 | spin_lock_init(&dev->rc_map.lock); |
1563 | spin_lock_init(&dev->keylock); | |
1564 | } | |
08aeb7c9 | 1565 | mutex_init(&dev->lock); |
bc2a6c57 | 1566 | |
d8b4b582 | 1567 | dev->dev.type = &rc_dev_type; |
40fc5325 | 1568 | dev->dev.class = &rc_class; |
d8b4b582 DH |
1569 | device_initialize(&dev->dev); |
1570 | ||
0f7499fd AS |
1571 | dev->driver_type = type; |
1572 | ||
d8b4b582 DH |
1573 | __module_get(THIS_MODULE); |
1574 | return dev; | |
1575 | } | |
1576 | EXPORT_SYMBOL_GPL(rc_allocate_device); | |
1577 | ||
1578 | void rc_free_device(struct rc_dev *dev) | |
bc2a6c57 | 1579 | { |
b05681b9 MCC |
1580 | if (!dev) |
1581 | return; | |
1582 | ||
3dd94f00 | 1583 | input_free_device(dev->input_dev); |
b05681b9 MCC |
1584 | |
1585 | put_device(&dev->dev); | |
1586 | ||
47cae1e1 MK |
1587 | /* kfree(dev) will be called by the callback function |
1588 | rc_dev_release() */ | |
1589 | ||
b05681b9 | 1590 | module_put(THIS_MODULE); |
d8b4b582 DH |
1591 | } |
1592 | EXPORT_SYMBOL_GPL(rc_free_device); | |
1593 | ||
ddbf7d5a HK |
1594 | static void devm_rc_alloc_release(struct device *dev, void *res) |
1595 | { | |
1596 | rc_free_device(*(struct rc_dev **)res); | |
1597 | } | |
1598 | ||
0f7499fd AS |
1599 | struct rc_dev *devm_rc_allocate_device(struct device *dev, |
1600 | enum rc_driver_type type) | |
ddbf7d5a HK |
1601 | { |
1602 | struct rc_dev **dr, *rc; | |
1603 | ||
1604 | dr = devres_alloc(devm_rc_alloc_release, sizeof(*dr), GFP_KERNEL); | |
1605 | if (!dr) | |
1606 | return NULL; | |
1607 | ||
0f7499fd | 1608 | rc = rc_allocate_device(type); |
ddbf7d5a HK |
1609 | if (!rc) { |
1610 | devres_free(dr); | |
1611 | return NULL; | |
1612 | } | |
1613 | ||
1614 | rc->dev.parent = dev; | |
1615 | rc->managed_alloc = true; | |
1616 | *dr = rc; | |
1617 | devres_add(dev, dr); | |
1618 | ||
1619 | return rc; | |
1620 | } | |
1621 | EXPORT_SYMBOL_GPL(devm_rc_allocate_device); | |
1622 | ||
f56928ab | 1623 | static int rc_prepare_rx_device(struct rc_dev *dev) |
d8b4b582 | 1624 | { |
fcb13097 | 1625 | int rc; |
7ff2c2bc | 1626 | struct rc_map *rc_map; |
41380868 | 1627 | u64 rc_type; |
bc2a6c57 | 1628 | |
7ff2c2bc | 1629 | if (!dev->map_name) |
d8b4b582 | 1630 | return -EINVAL; |
bc2a6c57 | 1631 | |
d100e659 | 1632 | rc_map = rc_map_get(dev->map_name); |
b088ba65 | 1633 | if (!rc_map) |
d100e659 | 1634 | rc_map = rc_map_get(RC_MAP_EMPTY); |
b088ba65 | 1635 | if (!rc_map || !rc_map->scan || rc_map->size == 0) |
d8b4b582 DH |
1636 | return -EINVAL; |
1637 | ||
7ff2c2bc AS |
1638 | rc = ir_setkeytable(dev, rc_map); |
1639 | if (rc) | |
1640 | return rc; | |
1641 | ||
41380868 | 1642 | rc_type = BIT_ULL(rc_map->rc_type); |
7ff2c2bc | 1643 | |
41380868 | 1644 | if (dev->change_protocol) { |
7ff2c2bc AS |
1645 | rc = dev->change_protocol(dev, &rc_type); |
1646 | if (rc < 0) | |
1647 | goto out_table; | |
1648 | dev->enabled_protocols = rc_type; | |
1649 | } | |
1650 | ||
41380868 SY |
1651 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1652 | ir_raw_load_modules(&rc_type); | |
1653 | ||
d8b4b582 DH |
1654 | set_bit(EV_KEY, dev->input_dev->evbit); |
1655 | set_bit(EV_REP, dev->input_dev->evbit); | |
1656 | set_bit(EV_MSC, dev->input_dev->evbit); | |
1657 | set_bit(MSC_SCAN, dev->input_dev->mscbit); | |
1658 | if (dev->open) | |
1659 | dev->input_dev->open = ir_open; | |
1660 | if (dev->close) | |
1661 | dev->input_dev->close = ir_close; | |
1662 | ||
b2aceb73 DH |
1663 | dev->input_dev->dev.parent = &dev->dev; |
1664 | memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id)); | |
1665 | dev->input_dev->phys = dev->input_phys; | |
1666 | dev->input_dev->name = dev->input_name; | |
1667 | ||
f56928ab DH |
1668 | return 0; |
1669 | ||
1670 | out_table: | |
1671 | ir_free_table(&dev->rc_map); | |
1672 | ||
1673 | return rc; | |
1674 | } | |
1675 | ||
1676 | static int rc_setup_rx_device(struct rc_dev *dev) | |
1677 | { | |
1678 | int rc; | |
1679 | ||
b2aceb73 DH |
1680 | /* rc_open will be called here */ |
1681 | rc = input_register_device(dev->input_dev); | |
1682 | if (rc) | |
f56928ab | 1683 | return rc; |
b2aceb73 | 1684 | |
7ff2c2bc AS |
1685 | /* |
1686 | * Default delay of 250ms is too short for some protocols, especially | |
1687 | * since the timeout is currently set to 250ms. Increase it to 500ms, | |
1688 | * to avoid wrong repetition of the keycodes. Note that this must be | |
1689 | * set after the call to input_register_device(). | |
1690 | */ | |
1691 | dev->input_dev->rep[REP_DELAY] = 500; | |
1692 | ||
1693 | /* | |
1694 | * As a repeat event on protocols like RC-5 and NEC take as long as | |
1695 | * 110/114ms, using 33ms as a repeat period is not the right thing | |
1696 | * to do. | |
1697 | */ | |
1698 | dev->input_dev->rep[REP_PERIOD] = 125; | |
1699 | ||
7ff2c2bc | 1700 | return 0; |
7ff2c2bc AS |
1701 | } |
1702 | ||
1703 | static void rc_free_rx_device(struct rc_dev *dev) | |
1704 | { | |
f56928ab | 1705 | if (!dev) |
7ff2c2bc AS |
1706 | return; |
1707 | ||
f56928ab DH |
1708 | if (dev->input_dev) { |
1709 | input_unregister_device(dev->input_dev); | |
1710 | dev->input_dev = NULL; | |
1711 | } | |
7ff2c2bc | 1712 | |
f56928ab | 1713 | ir_free_table(&dev->rc_map); |
7ff2c2bc AS |
1714 | } |
1715 | ||
1716 | int rc_register_device(struct rc_dev *dev) | |
1717 | { | |
7ff2c2bc AS |
1718 | const char *path; |
1719 | int attr = 0; | |
1720 | int minor; | |
1721 | int rc; | |
1722 | ||
1723 | if (!dev) | |
1724 | return -EINVAL; | |
1725 | ||
fcb13097 DH |
1726 | minor = ida_simple_get(&rc_ida, 0, RC_DEV_MAX, GFP_KERNEL); |
1727 | if (minor < 0) | |
1728 | return minor; | |
1729 | ||
1730 | dev->minor = minor; | |
1731 | dev_set_name(&dev->dev, "rc%u", dev->minor); | |
1732 | dev_set_drvdata(&dev->dev, dev); | |
587d1b06 | 1733 | |
99b0f3c9 | 1734 | dev->dev.groups = dev->sysfs_groups; |
d34aee10 AS |
1735 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) |
1736 | dev->sysfs_groups[attr++] = &rc_dev_protocol_attr_grp; | |
99b0f3c9 | 1737 | if (dev->s_filter) |
120703f9 | 1738 | dev->sysfs_groups[attr++] = &rc_dev_filter_attr_grp; |
99b0f3c9 DH |
1739 | if (dev->s_wakeup_filter) |
1740 | dev->sysfs_groups[attr++] = &rc_dev_wakeup_filter_attr_grp; | |
99b0f3c9 DH |
1741 | dev->sysfs_groups[attr++] = NULL; |
1742 | ||
f56928ab DH |
1743 | if (dev->driver_type == RC_DRIVER_IR_RAW || |
1744 | dev->driver_type == RC_DRIVER_IR_RAW_TX) { | |
1745 | rc = ir_raw_event_prepare(dev); | |
1746 | if (rc < 0) | |
1747 | goto out_minor; | |
1748 | } | |
1749 | ||
1750 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { | |
1751 | rc = rc_prepare_rx_device(dev); | |
1752 | if (rc) | |
1753 | goto out_raw; | |
1754 | } | |
1755 | ||
d8b4b582 DH |
1756 | rc = device_add(&dev->dev); |
1757 | if (rc) | |
f56928ab | 1758 | goto out_rx_free; |
bc2a6c57 | 1759 | |
d8b4b582 | 1760 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
4dc0e908 HK |
1761 | dev_info(&dev->dev, "%s as %s\n", |
1762 | dev->input_name ?: "Unspecified device", path ?: "N/A"); | |
bc2a6c57 MCC |
1763 | kfree(path); |
1764 | ||
f56928ab DH |
1765 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { |
1766 | rc = rc_setup_rx_device(dev); | |
1767 | if (rc) | |
1768 | goto out_dev; | |
1769 | } | |
1770 | ||
d34aee10 AS |
1771 | if (dev->driver_type == RC_DRIVER_IR_RAW || |
1772 | dev->driver_type == RC_DRIVER_IR_RAW_TX) { | |
d8b4b582 DH |
1773 | rc = ir_raw_event_register(dev); |
1774 | if (rc < 0) | |
f56928ab | 1775 | goto out_rx; |
d8b4b582 DH |
1776 | } |
1777 | ||
7ff2c2bc | 1778 | IR_dprintk(1, "Registered rc%u (driver: %s)\n", |
fcb13097 | 1779 | dev->minor, |
7ff2c2bc | 1780 | dev->driver_name ? dev->driver_name : "unknown"); |
d8b4b582 | 1781 | |
bc2a6c57 | 1782 | return 0; |
d8b4b582 | 1783 | |
f56928ab DH |
1784 | out_rx: |
1785 | rc_free_rx_device(dev); | |
d8b4b582 DH |
1786 | out_dev: |
1787 | device_del(&dev->dev); | |
f56928ab DH |
1788 | out_rx_free: |
1789 | ir_free_table(&dev->rc_map); | |
1790 | out_raw: | |
1791 | ir_raw_event_free(dev); | |
1792 | out_minor: | |
fcb13097 | 1793 | ida_simple_remove(&rc_ida, minor); |
d8b4b582 | 1794 | return rc; |
bc2a6c57 | 1795 | } |
d8b4b582 | 1796 | EXPORT_SYMBOL_GPL(rc_register_device); |
bc2a6c57 | 1797 | |
ddbf7d5a HK |
1798 | static void devm_rc_release(struct device *dev, void *res) |
1799 | { | |
1800 | rc_unregister_device(*(struct rc_dev **)res); | |
1801 | } | |
1802 | ||
1803 | int devm_rc_register_device(struct device *parent, struct rc_dev *dev) | |
1804 | { | |
1805 | struct rc_dev **dr; | |
1806 | int ret; | |
1807 | ||
1808 | dr = devres_alloc(devm_rc_release, sizeof(*dr), GFP_KERNEL); | |
1809 | if (!dr) | |
1810 | return -ENOMEM; | |
1811 | ||
1812 | ret = rc_register_device(dev); | |
1813 | if (ret) { | |
1814 | devres_free(dr); | |
1815 | return ret; | |
1816 | } | |
1817 | ||
1818 | *dr = dev; | |
1819 | devres_add(parent, dr); | |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | EXPORT_SYMBOL_GPL(devm_rc_register_device); | |
1824 | ||
d8b4b582 | 1825 | void rc_unregister_device(struct rc_dev *dev) |
bc2a6c57 | 1826 | { |
d8b4b582 DH |
1827 | if (!dev) |
1828 | return; | |
bc2a6c57 | 1829 | |
d8b4b582 | 1830 | del_timer_sync(&dev->timer_keyup); |
bc2a6c57 | 1831 | |
d8b4b582 DH |
1832 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1833 | ir_raw_event_unregister(dev); | |
1834 | ||
7ff2c2bc | 1835 | rc_free_rx_device(dev); |
d8b4b582 | 1836 | |
b05681b9 | 1837 | device_del(&dev->dev); |
d8b4b582 | 1838 | |
fcb13097 DH |
1839 | ida_simple_remove(&rc_ida, dev->minor); |
1840 | ||
ddbf7d5a HK |
1841 | if (!dev->managed_alloc) |
1842 | rc_free_device(dev); | |
bc2a6c57 | 1843 | } |
b05681b9 | 1844 | |
d8b4b582 | 1845 | EXPORT_SYMBOL_GPL(rc_unregister_device); |
bc2a6c57 MCC |
1846 | |
1847 | /* | |
1848 | * Init/exit code for the module. Basically, creates/removes /sys/class/rc | |
1849 | */ | |
1850 | ||
6bda9644 | 1851 | static int __init rc_core_init(void) |
bc2a6c57 | 1852 | { |
40fc5325 | 1853 | int rc = class_register(&rc_class); |
bc2a6c57 | 1854 | if (rc) { |
d3d96820 | 1855 | pr_err("rc_core: unable to register rc class\n"); |
bc2a6c57 MCC |
1856 | return rc; |
1857 | } | |
1858 | ||
153a60bb | 1859 | led_trigger_register_simple("rc-feedback", &led_feedback); |
d100e659 | 1860 | rc_map_register(&empty_map); |
bc2a6c57 MCC |
1861 | |
1862 | return 0; | |
1863 | } | |
1864 | ||
6bda9644 | 1865 | static void __exit rc_core_exit(void) |
bc2a6c57 | 1866 | { |
40fc5325 | 1867 | class_unregister(&rc_class); |
153a60bb | 1868 | led_trigger_unregister_simple(led_feedback); |
d100e659 | 1869 | rc_map_unregister(&empty_map); |
bc2a6c57 MCC |
1870 | } |
1871 | ||
e76d4ce4 | 1872 | subsys_initcall(rc_core_init); |
6bda9644 | 1873 | module_exit(rc_core_exit); |
bc2a6c57 | 1874 | |
6bda9644 MCC |
1875 | int rc_core_debug; /* ir_debug level (0,1,2) */ |
1876 | EXPORT_SYMBOL_GPL(rc_core_debug); | |
1877 | module_param_named(debug, rc_core_debug, int, 0644); | |
446e4a64 | 1878 | |
37e59f87 | 1879 | MODULE_AUTHOR("Mauro Carvalho Chehab"); |
446e4a64 | 1880 | MODULE_LICENSE("GPL"); |