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Commit | Line | Data |
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20835280 MCC |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // rc-main.c - Remote Controller core module | |
3 | // | |
4 | // Copyright (C) 2009-2010 by Mauro Carvalho Chehab | |
ef53a115 | 5 | |
d3d96820 MCC |
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
7 | ||
6bda9644 | 8 | #include <media/rc-core.h> |
8ca01d4f | 9 | #include <linux/bsearch.h> |
631493ec MCC |
10 | #include <linux/spinlock.h> |
11 | #include <linux/delay.h> | |
882ead32 | 12 | #include <linux/input.h> |
153a60bb | 13 | #include <linux/leds.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
fcb13097 | 15 | #include <linux/idr.h> |
bc2a6c57 | 16 | #include <linux/device.h> |
7a707b89 | 17 | #include <linux/module.h> |
f62de675 | 18 | #include "rc-core-priv.h" |
ef53a115 | 19 | |
b3074c0a DH |
20 | /* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */ |
21 | #define IR_TAB_MIN_SIZE 256 | |
22 | #define IR_TAB_MAX_SIZE 8192 | |
f6fc5049 | 23 | |
d57ea877 SY |
24 | static const struct { |
25 | const char *name; | |
26 | unsigned int repeat_period; | |
27 | unsigned int scancode_bits; | |
28 | } protocols[] = { | |
6d741bfe SY |
29 | [RC_PROTO_UNKNOWN] = { .name = "unknown", .repeat_period = 250 }, |
30 | [RC_PROTO_OTHER] = { .name = "other", .repeat_period = 250 }, | |
31 | [RC_PROTO_RC5] = { .name = "rc-5", | |
67f0f15a | 32 | .scancode_bits = 0x1f7f, .repeat_period = 250 }, |
6d741bfe | 33 | [RC_PROTO_RC5X_20] = { .name = "rc-5x-20", |
67f0f15a | 34 | .scancode_bits = 0x1f7f3f, .repeat_period = 250 }, |
6d741bfe | 35 | [RC_PROTO_RC5_SZ] = { .name = "rc-5-sz", |
67f0f15a | 36 | .scancode_bits = 0x2fff, .repeat_period = 250 }, |
6d741bfe | 37 | [RC_PROTO_JVC] = { .name = "jvc", |
d57ea877 | 38 | .scancode_bits = 0xffff, .repeat_period = 250 }, |
6d741bfe | 39 | [RC_PROTO_SONY12] = { .name = "sony-12", |
67f0f15a | 40 | .scancode_bits = 0x1f007f, .repeat_period = 250 }, |
6d741bfe | 41 | [RC_PROTO_SONY15] = { .name = "sony-15", |
67f0f15a | 42 | .scancode_bits = 0xff007f, .repeat_period = 250 }, |
6d741bfe | 43 | [RC_PROTO_SONY20] = { .name = "sony-20", |
67f0f15a | 44 | .scancode_bits = 0x1fff7f, .repeat_period = 250 }, |
6d741bfe | 45 | [RC_PROTO_NEC] = { .name = "nec", |
67f0f15a | 46 | .scancode_bits = 0xffff, .repeat_period = 250 }, |
6d741bfe | 47 | [RC_PROTO_NECX] = { .name = "nec-x", |
67f0f15a | 48 | .scancode_bits = 0xffffff, .repeat_period = 250 }, |
6d741bfe | 49 | [RC_PROTO_NEC32] = { .name = "nec-32", |
67f0f15a | 50 | .scancode_bits = 0xffffffff, .repeat_period = 250 }, |
6d741bfe | 51 | [RC_PROTO_SANYO] = { .name = "sanyo", |
d57ea877 | 52 | .scancode_bits = 0x1fffff, .repeat_period = 250 }, |
6d741bfe | 53 | [RC_PROTO_MCIR2_KBD] = { .name = "mcir2-kbd", |
67f0f15a | 54 | .scancode_bits = 0xffff, .repeat_period = 250 }, |
6d741bfe | 55 | [RC_PROTO_MCIR2_MSE] = { .name = "mcir2-mse", |
67f0f15a | 56 | .scancode_bits = 0x1fffff, .repeat_period = 250 }, |
6d741bfe | 57 | [RC_PROTO_RC6_0] = { .name = "rc-6-0", |
67f0f15a | 58 | .scancode_bits = 0xffff, .repeat_period = 250 }, |
6d741bfe | 59 | [RC_PROTO_RC6_6A_20] = { .name = "rc-6-6a-20", |
67f0f15a | 60 | .scancode_bits = 0xfffff, .repeat_period = 250 }, |
6d741bfe | 61 | [RC_PROTO_RC6_6A_24] = { .name = "rc-6-6a-24", |
67f0f15a | 62 | .scancode_bits = 0xffffff, .repeat_period = 250 }, |
6d741bfe | 63 | [RC_PROTO_RC6_6A_32] = { .name = "rc-6-6a-32", |
67f0f15a | 64 | .scancode_bits = 0xffffffff, .repeat_period = 250 }, |
6d741bfe | 65 | [RC_PROTO_RC6_MCE] = { .name = "rc-6-mce", |
67f0f15a | 66 | .scancode_bits = 0xffff7fff, .repeat_period = 250 }, |
6d741bfe | 67 | [RC_PROTO_SHARP] = { .name = "sharp", |
d57ea877 | 68 | .scancode_bits = 0x1fff, .repeat_period = 250 }, |
6d741bfe SY |
69 | [RC_PROTO_XMP] = { .name = "xmp", .repeat_period = 250 }, |
70 | [RC_PROTO_CEC] = { .name = "cec", .repeat_period = 550 }, | |
447dcc0c SY |
71 | [RC_PROTO_IMON] = { .name = "imon", |
72 | .scancode_bits = 0x7fffffff, .repeat_period = 250 }, | |
d57ea877 | 73 | }; |
a374fef4 | 74 | |
4c7b355d | 75 | /* Used to keep track of known keymaps */ |
631493ec MCC |
76 | static LIST_HEAD(rc_map_list); |
77 | static DEFINE_SPINLOCK(rc_map_lock); | |
153a60bb | 78 | static struct led_trigger *led_feedback; |
631493ec | 79 | |
fcb13097 DH |
80 | /* Used to keep track of rc devices */ |
81 | static DEFINE_IDA(rc_ida); | |
82 | ||
d100e659 | 83 | static struct rc_map_list *seek_rc_map(const char *name) |
631493ec | 84 | { |
d100e659 | 85 | struct rc_map_list *map = NULL; |
631493ec MCC |
86 | |
87 | spin_lock(&rc_map_lock); | |
88 | list_for_each_entry(map, &rc_map_list, list) { | |
89 | if (!strcmp(name, map->map.name)) { | |
90 | spin_unlock(&rc_map_lock); | |
91 | return map; | |
92 | } | |
93 | } | |
94 | spin_unlock(&rc_map_lock); | |
95 | ||
96 | return NULL; | |
97 | } | |
98 | ||
d100e659 | 99 | struct rc_map *rc_map_get(const char *name) |
631493ec MCC |
100 | { |
101 | ||
d100e659 | 102 | struct rc_map_list *map; |
631493ec MCC |
103 | |
104 | map = seek_rc_map(name); | |
2ff56fad | 105 | #ifdef CONFIG_MODULES |
631493ec | 106 | if (!map) { |
8ea5488a | 107 | int rc = request_module("%s", name); |
631493ec | 108 | if (rc < 0) { |
d3d96820 | 109 | pr_err("Couldn't load IR keymap %s\n", name); |
631493ec MCC |
110 | return NULL; |
111 | } | |
112 | msleep(20); /* Give some time for IR to register */ | |
113 | ||
114 | map = seek_rc_map(name); | |
115 | } | |
116 | #endif | |
117 | if (!map) { | |
d3d96820 | 118 | pr_err("IR keymap %s not found\n", name); |
631493ec MCC |
119 | return NULL; |
120 | } | |
121 | ||
122 | printk(KERN_INFO "Registered IR keymap %s\n", map->map.name); | |
123 | ||
124 | return &map->map; | |
125 | } | |
d100e659 | 126 | EXPORT_SYMBOL_GPL(rc_map_get); |
631493ec | 127 | |
d100e659 | 128 | int rc_map_register(struct rc_map_list *map) |
631493ec MCC |
129 | { |
130 | spin_lock(&rc_map_lock); | |
131 | list_add_tail(&map->list, &rc_map_list); | |
132 | spin_unlock(&rc_map_lock); | |
133 | return 0; | |
134 | } | |
d100e659 | 135 | EXPORT_SYMBOL_GPL(rc_map_register); |
631493ec | 136 | |
d100e659 | 137 | void rc_map_unregister(struct rc_map_list *map) |
631493ec MCC |
138 | { |
139 | spin_lock(&rc_map_lock); | |
140 | list_del(&map->list); | |
141 | spin_unlock(&rc_map_lock); | |
142 | } | |
d100e659 | 143 | EXPORT_SYMBOL_GPL(rc_map_unregister); |
631493ec MCC |
144 | |
145 | ||
2f4f58d6 | 146 | static struct rc_map_table empty[] = { |
631493ec MCC |
147 | { 0x2a, KEY_COFFEE }, |
148 | }; | |
149 | ||
d100e659 | 150 | static struct rc_map_list empty_map = { |
631493ec | 151 | .map = { |
6d741bfe SY |
152 | .scan = empty, |
153 | .size = ARRAY_SIZE(empty), | |
154 | .rc_proto = RC_PROTO_UNKNOWN, /* Legacy IR type */ | |
155 | .name = RC_MAP_EMPTY, | |
631493ec MCC |
156 | } |
157 | }; | |
158 | ||
9f470095 DT |
159 | /** |
160 | * ir_create_table() - initializes a scancode table | |
1f17f684 | 161 | * @dev: the rc_dev device |
b088ba65 | 162 | * @rc_map: the rc_map to initialize |
9f470095 | 163 | * @name: name to assign to the table |
6d741bfe | 164 | * @rc_proto: ir type to assign to the new table |
9f470095 | 165 | * @size: initial size of the table |
9f470095 | 166 | * |
b088ba65 | 167 | * This routine will initialize the rc_map and will allocate |
d8b4b582 | 168 | * memory to hold at least the specified number of elements. |
f67f366c MCC |
169 | * |
170 | * return: zero on success or a negative error code | |
9f470095 | 171 | */ |
1f17f684 | 172 | static int ir_create_table(struct rc_dev *dev, struct rc_map *rc_map, |
6d741bfe | 173 | const char *name, u64 rc_proto, size_t size) |
9f470095 | 174 | { |
d54fc3bb HV |
175 | rc_map->name = kstrdup(name, GFP_KERNEL); |
176 | if (!rc_map->name) | |
177 | return -ENOMEM; | |
6d741bfe | 178 | rc_map->rc_proto = rc_proto; |
2f4f58d6 MCC |
179 | rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table)); |
180 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); | |
b088ba65 | 181 | rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL); |
d54fc3bb HV |
182 | if (!rc_map->scan) { |
183 | kfree(rc_map->name); | |
184 | rc_map->name = NULL; | |
9f470095 | 185 | return -ENOMEM; |
d54fc3bb | 186 | } |
9f470095 | 187 | |
1f17f684 SY |
188 | dev_dbg(&dev->dev, "Allocated space for %u keycode entries (%u bytes)\n", |
189 | rc_map->size, rc_map->alloc); | |
9f470095 DT |
190 | return 0; |
191 | } | |
192 | ||
193 | /** | |
194 | * ir_free_table() - frees memory allocated by a scancode table | |
b088ba65 | 195 | * @rc_map: the table whose mappings need to be freed |
9f470095 DT |
196 | * |
197 | * This routine will free memory alloctaed for key mappings used by given | |
198 | * scancode table. | |
199 | */ | |
b088ba65 | 200 | static void ir_free_table(struct rc_map *rc_map) |
9f470095 | 201 | { |
b088ba65 | 202 | rc_map->size = 0; |
d54fc3bb | 203 | kfree(rc_map->name); |
c183d358 | 204 | rc_map->name = NULL; |
b088ba65 MCC |
205 | kfree(rc_map->scan); |
206 | rc_map->scan = NULL; | |
9f470095 DT |
207 | } |
208 | ||
7fee03e4 | 209 | /** |
b3074c0a | 210 | * ir_resize_table() - resizes a scancode table if necessary |
1f17f684 | 211 | * @dev: the rc_dev device |
b088ba65 | 212 | * @rc_map: the rc_map to resize |
9f470095 | 213 | * @gfp_flags: gfp flags to use when allocating memory |
7fee03e4 | 214 | * |
b088ba65 | 215 | * This routine will shrink the rc_map if it has lots of |
b3074c0a | 216 | * unused entries and grow it if it is full. |
f67f366c MCC |
217 | * |
218 | * return: zero on success or a negative error code | |
7fee03e4 | 219 | */ |
1f17f684 SY |
220 | static int ir_resize_table(struct rc_dev *dev, struct rc_map *rc_map, |
221 | gfp_t gfp_flags) | |
7fee03e4 | 222 | { |
b088ba65 | 223 | unsigned int oldalloc = rc_map->alloc; |
b3074c0a | 224 | unsigned int newalloc = oldalloc; |
2f4f58d6 MCC |
225 | struct rc_map_table *oldscan = rc_map->scan; |
226 | struct rc_map_table *newscan; | |
b3074c0a | 227 | |
b088ba65 | 228 | if (rc_map->size == rc_map->len) { |
b3074c0a | 229 | /* All entries in use -> grow keytable */ |
b088ba65 | 230 | if (rc_map->alloc >= IR_TAB_MAX_SIZE) |
b3074c0a | 231 | return -ENOMEM; |
7fee03e4 | 232 | |
b3074c0a | 233 | newalloc *= 2; |
1f17f684 | 234 | dev_dbg(&dev->dev, "Growing table to %u bytes\n", newalloc); |
b3074c0a | 235 | } |
7fee03e4 | 236 | |
b088ba65 | 237 | if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) { |
b3074c0a DH |
238 | /* Less than 1/3 of entries in use -> shrink keytable */ |
239 | newalloc /= 2; | |
1f17f684 | 240 | dev_dbg(&dev->dev, "Shrinking table to %u bytes\n", newalloc); |
b3074c0a | 241 | } |
7fee03e4 | 242 | |
b3074c0a DH |
243 | if (newalloc == oldalloc) |
244 | return 0; | |
7fee03e4 | 245 | |
9f470095 | 246 | newscan = kmalloc(newalloc, gfp_flags); |
1f17f684 | 247 | if (!newscan) |
b3074c0a | 248 | return -ENOMEM; |
7fee03e4 | 249 | |
2f4f58d6 | 250 | memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table)); |
b088ba65 MCC |
251 | rc_map->scan = newscan; |
252 | rc_map->alloc = newalloc; | |
2f4f58d6 | 253 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); |
b3074c0a DH |
254 | kfree(oldscan); |
255 | return 0; | |
7fee03e4 MCC |
256 | } |
257 | ||
f6fc5049 | 258 | /** |
9f470095 | 259 | * ir_update_mapping() - set a keycode in the scancode->keycode table |
d8b4b582 | 260 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 261 | * @rc_map: scancode table to be adjusted |
9f470095 | 262 | * @index: index of the mapping that needs to be updated |
f67f366c | 263 | * @new_keycode: the desired keycode |
9f470095 | 264 | * |
d8b4b582 | 265 | * This routine is used to update scancode->keycode mapping at given |
9f470095 | 266 | * position. |
f67f366c MCC |
267 | * |
268 | * return: previous keycode assigned to the mapping | |
269 | * | |
9f470095 | 270 | */ |
d8b4b582 | 271 | static unsigned int ir_update_mapping(struct rc_dev *dev, |
b088ba65 | 272 | struct rc_map *rc_map, |
9f470095 DT |
273 | unsigned int index, |
274 | unsigned int new_keycode) | |
275 | { | |
b088ba65 | 276 | int old_keycode = rc_map->scan[index].keycode; |
9f470095 DT |
277 | int i; |
278 | ||
279 | /* Did the user wish to remove the mapping? */ | |
280 | if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) { | |
1f17f684 SY |
281 | dev_dbg(&dev->dev, "#%d: Deleting scan 0x%04x\n", |
282 | index, rc_map->scan[index].scancode); | |
b088ba65 MCC |
283 | rc_map->len--; |
284 | memmove(&rc_map->scan[index], &rc_map->scan[index+ 1], | |
2f4f58d6 | 285 | (rc_map->len - index) * sizeof(struct rc_map_table)); |
9f470095 | 286 | } else { |
1f17f684 SY |
287 | dev_dbg(&dev->dev, "#%d: %s scan 0x%04x with key 0x%04x\n", |
288 | index, | |
289 | old_keycode == KEY_RESERVED ? "New" : "Replacing", | |
290 | rc_map->scan[index].scancode, new_keycode); | |
b088ba65 | 291 | rc_map->scan[index].keycode = new_keycode; |
d8b4b582 | 292 | __set_bit(new_keycode, dev->input_dev->keybit); |
9f470095 DT |
293 | } |
294 | ||
295 | if (old_keycode != KEY_RESERVED) { | |
296 | /* A previous mapping was updated... */ | |
d8b4b582 | 297 | __clear_bit(old_keycode, dev->input_dev->keybit); |
9f470095 | 298 | /* ... but another scancode might use the same keycode */ |
b088ba65 MCC |
299 | for (i = 0; i < rc_map->len; i++) { |
300 | if (rc_map->scan[i].keycode == old_keycode) { | |
d8b4b582 | 301 | __set_bit(old_keycode, dev->input_dev->keybit); |
9f470095 DT |
302 | break; |
303 | } | |
304 | } | |
305 | ||
306 | /* Possibly shrink the keytable, failure is not a problem */ | |
1f17f684 | 307 | ir_resize_table(dev, rc_map, GFP_ATOMIC); |
9f470095 DT |
308 | } |
309 | ||
310 | return old_keycode; | |
311 | } | |
312 | ||
313 | /** | |
4c7b355d | 314 | * ir_establish_scancode() - set a keycode in the scancode->keycode table |
d8b4b582 | 315 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 316 | * @rc_map: scancode table to be searched |
9f470095 DT |
317 | * @scancode: the desired scancode |
318 | * @resize: controls whether we allowed to resize the table to | |
25985edc | 319 | * accommodate not yet present scancodes |
f6fc5049 | 320 | * |
b088ba65 | 321 | * This routine is used to locate given scancode in rc_map. |
9f470095 DT |
322 | * If scancode is not yet present the routine will allocate a new slot |
323 | * for it. | |
f67f366c MCC |
324 | * |
325 | * return: index of the mapping containing scancode in question | |
326 | * or -1U in case of failure. | |
f6fc5049 | 327 | */ |
d8b4b582 | 328 | static unsigned int ir_establish_scancode(struct rc_dev *dev, |
b088ba65 | 329 | struct rc_map *rc_map, |
9f470095 DT |
330 | unsigned int scancode, |
331 | bool resize) | |
f6fc5049 | 332 | { |
b3074c0a | 333 | unsigned int i; |
9dfe4e83 MCC |
334 | |
335 | /* | |
336 | * Unfortunately, some hardware-based IR decoders don't provide | |
337 | * all bits for the complete IR code. In general, they provide only | |
338 | * the command part of the IR code. Yet, as it is possible to replace | |
339 | * the provided IR with another one, it is needed to allow loading | |
d8b4b582 DH |
340 | * IR tables from other remotes. So, we support specifying a mask to |
341 | * indicate the valid bits of the scancodes. | |
9dfe4e83 | 342 | */ |
9d2f1d3c DH |
343 | if (dev->scancode_mask) |
344 | scancode &= dev->scancode_mask; | |
b3074c0a DH |
345 | |
346 | /* First check if we already have a mapping for this ir command */ | |
b088ba65 MCC |
347 | for (i = 0; i < rc_map->len; i++) { |
348 | if (rc_map->scan[i].scancode == scancode) | |
9f470095 DT |
349 | return i; |
350 | ||
b3074c0a | 351 | /* Keytable is sorted from lowest to highest scancode */ |
b088ba65 | 352 | if (rc_map->scan[i].scancode >= scancode) |
b3074c0a | 353 | break; |
b3074c0a | 354 | } |
f6fc5049 | 355 | |
9f470095 | 356 | /* No previous mapping found, we might need to grow the table */ |
b088ba65 | 357 | if (rc_map->size == rc_map->len) { |
1f17f684 | 358 | if (!resize || ir_resize_table(dev, rc_map, GFP_ATOMIC)) |
9f470095 DT |
359 | return -1U; |
360 | } | |
35438946 | 361 | |
9f470095 | 362 | /* i is the proper index to insert our new keycode */ |
b088ba65 MCC |
363 | if (i < rc_map->len) |
364 | memmove(&rc_map->scan[i + 1], &rc_map->scan[i], | |
2f4f58d6 | 365 | (rc_map->len - i) * sizeof(struct rc_map_table)); |
b088ba65 MCC |
366 | rc_map->scan[i].scancode = scancode; |
367 | rc_map->scan[i].keycode = KEY_RESERVED; | |
368 | rc_map->len++; | |
f6fc5049 | 369 | |
9f470095 | 370 | return i; |
f6fc5049 MCC |
371 | } |
372 | ||
ef53a115 | 373 | /** |
b3074c0a | 374 | * ir_setkeycode() - set a keycode in the scancode->keycode table |
d8b4b582 | 375 | * @idev: the struct input_dev device descriptor |
f67f366c MCC |
376 | * @ke: Input keymap entry |
377 | * @old_keycode: result | |
ef53a115 | 378 | * |
b3074c0a | 379 | * This routine is used to handle evdev EVIOCSKEY ioctl. |
f67f366c MCC |
380 | * |
381 | * return: -EINVAL if the keycode could not be inserted, otherwise zero. | |
ef53a115 | 382 | */ |
d8b4b582 | 383 | static int ir_setkeycode(struct input_dev *idev, |
9f470095 DT |
384 | const struct input_keymap_entry *ke, |
385 | unsigned int *old_keycode) | |
ef53a115 | 386 | { |
d8b4b582 | 387 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 388 | struct rc_map *rc_map = &rdev->rc_map; |
9f470095 DT |
389 | unsigned int index; |
390 | unsigned int scancode; | |
dea8a39f | 391 | int retval = 0; |
9f470095 | 392 | unsigned long flags; |
ef53a115 | 393 | |
b088ba65 | 394 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
395 | |
396 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
397 | index = ke->index; | |
b088ba65 | 398 | if (index >= rc_map->len) { |
9f470095 DT |
399 | retval = -EINVAL; |
400 | goto out; | |
401 | } | |
402 | } else { | |
403 | retval = input_scancode_to_scalar(ke, &scancode); | |
404 | if (retval) | |
405 | goto out; | |
406 | ||
b088ba65 MCC |
407 | index = ir_establish_scancode(rdev, rc_map, scancode, true); |
408 | if (index >= rc_map->len) { | |
9f470095 DT |
409 | retval = -ENOMEM; |
410 | goto out; | |
411 | } | |
412 | } | |
413 | ||
b088ba65 | 414 | *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode); |
9f470095 DT |
415 | |
416 | out: | |
b088ba65 | 417 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 418 | return retval; |
e97f4677 MCC |
419 | } |
420 | ||
421 | /** | |
b3074c0a | 422 | * ir_setkeytable() - sets several entries in the scancode->keycode table |
d8b4b582 | 423 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 424 | * @from: the struct rc_map to copy entries from |
e97f4677 | 425 | * |
b3074c0a | 426 | * This routine is used to handle table initialization. |
f67f366c MCC |
427 | * |
428 | * return: -ENOMEM if all keycodes could not be inserted, otherwise zero. | |
e97f4677 | 429 | */ |
d8b4b582 | 430 | static int ir_setkeytable(struct rc_dev *dev, |
b088ba65 | 431 | const struct rc_map *from) |
e97f4677 | 432 | { |
b088ba65 | 433 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
434 | unsigned int i, index; |
435 | int rc; | |
436 | ||
1f17f684 SY |
437 | rc = ir_create_table(dev, rc_map, from->name, from->rc_proto, |
438 | from->size); | |
9f470095 DT |
439 | if (rc) |
440 | return rc; | |
441 | ||
b3074c0a | 442 | for (i = 0; i < from->size; i++) { |
b088ba65 | 443 | index = ir_establish_scancode(dev, rc_map, |
9f470095 | 444 | from->scan[i].scancode, false); |
b088ba65 | 445 | if (index >= rc_map->len) { |
9f470095 | 446 | rc = -ENOMEM; |
b3074c0a | 447 | break; |
9f470095 DT |
448 | } |
449 | ||
b088ba65 | 450 | ir_update_mapping(dev, rc_map, index, |
9f470095 | 451 | from->scan[i].keycode); |
e97f4677 | 452 | } |
9f470095 DT |
453 | |
454 | if (rc) | |
b088ba65 | 455 | ir_free_table(rc_map); |
9f470095 | 456 | |
b3074c0a | 457 | return rc; |
ef53a115 MCC |
458 | } |
459 | ||
8ca01d4f TM |
460 | static int rc_map_cmp(const void *key, const void *elt) |
461 | { | |
462 | const unsigned int *scancode = key; | |
463 | const struct rc_map_table *e = elt; | |
464 | ||
465 | if (*scancode < e->scancode) | |
466 | return -1; | |
467 | else if (*scancode > e->scancode) | |
468 | return 1; | |
469 | return 0; | |
470 | } | |
471 | ||
9f470095 DT |
472 | /** |
473 | * ir_lookup_by_scancode() - locate mapping by scancode | |
b088ba65 | 474 | * @rc_map: the struct rc_map to search |
9f470095 | 475 | * @scancode: scancode to look for in the table |
9f470095 DT |
476 | * |
477 | * This routine performs binary search in RC keykeymap table for | |
478 | * given scancode. | |
f67f366c MCC |
479 | * |
480 | * return: index in the table, -1U if not found | |
9f470095 | 481 | */ |
b088ba65 | 482 | static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map, |
9f470095 DT |
483 | unsigned int scancode) |
484 | { | |
8ca01d4f TM |
485 | struct rc_map_table *res; |
486 | ||
487 | res = bsearch(&scancode, rc_map->scan, rc_map->len, | |
488 | sizeof(struct rc_map_table), rc_map_cmp); | |
489 | if (!res) | |
490 | return -1U; | |
491 | else | |
492 | return res - rc_map->scan; | |
9f470095 DT |
493 | } |
494 | ||
ef53a115 | 495 | /** |
b3074c0a | 496 | * ir_getkeycode() - get a keycode from the scancode->keycode table |
d8b4b582 | 497 | * @idev: the struct input_dev device descriptor |
f67f366c | 498 | * @ke: Input keymap entry |
ef53a115 | 499 | * |
b3074c0a | 500 | * This routine is used to handle evdev EVIOCGKEY ioctl. |
f67f366c MCC |
501 | * |
502 | * return: always returns zero. | |
ef53a115 | 503 | */ |
d8b4b582 | 504 | static int ir_getkeycode(struct input_dev *idev, |
9f470095 | 505 | struct input_keymap_entry *ke) |
ef53a115 | 506 | { |
d8b4b582 | 507 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 508 | struct rc_map *rc_map = &rdev->rc_map; |
2f4f58d6 | 509 | struct rc_map_table *entry; |
9f470095 DT |
510 | unsigned long flags; |
511 | unsigned int index; | |
512 | unsigned int scancode; | |
513 | int retval; | |
ef53a115 | 514 | |
b088ba65 | 515 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
516 | |
517 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
518 | index = ke->index; | |
519 | } else { | |
520 | retval = input_scancode_to_scalar(ke, &scancode); | |
521 | if (retval) | |
522 | goto out; | |
523 | ||
b088ba65 | 524 | index = ir_lookup_by_scancode(rc_map, scancode); |
9f470095 DT |
525 | } |
526 | ||
54e74b87 DT |
527 | if (index < rc_map->len) { |
528 | entry = &rc_map->scan[index]; | |
529 | ||
530 | ke->index = index; | |
531 | ke->keycode = entry->keycode; | |
532 | ke->len = sizeof(entry->scancode); | |
533 | memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode)); | |
534 | ||
535 | } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) { | |
536 | /* | |
537 | * We do not really know the valid range of scancodes | |
538 | * so let's respond with KEY_RESERVED to anything we | |
539 | * do not have mapping for [yet]. | |
540 | */ | |
541 | ke->index = index; | |
542 | ke->keycode = KEY_RESERVED; | |
543 | } else { | |
9f470095 DT |
544 | retval = -EINVAL; |
545 | goto out; | |
e97f4677 MCC |
546 | } |
547 | ||
47c5ba53 DT |
548 | retval = 0; |
549 | ||
9f470095 | 550 | out: |
b088ba65 | 551 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 552 | return retval; |
ef53a115 MCC |
553 | } |
554 | ||
555 | /** | |
ca86674b | 556 | * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode |
d8b4b582 DH |
557 | * @dev: the struct rc_dev descriptor of the device |
558 | * @scancode: the scancode to look for | |
ef53a115 | 559 | * |
d8b4b582 DH |
560 | * This routine is used by drivers which need to convert a scancode to a |
561 | * keycode. Normally it should not be used since drivers should have no | |
562 | * interest in keycodes. | |
f67f366c MCC |
563 | * |
564 | * return: the corresponding keycode, or KEY_RESERVED | |
ef53a115 | 565 | */ |
ca86674b | 566 | u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode) |
ef53a115 | 567 | { |
b088ba65 | 568 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
569 | unsigned int keycode; |
570 | unsigned int index; | |
571 | unsigned long flags; | |
572 | ||
b088ba65 | 573 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 | 574 | |
b088ba65 MCC |
575 | index = ir_lookup_by_scancode(rc_map, scancode); |
576 | keycode = index < rc_map->len ? | |
577 | rc_map->scan[index].keycode : KEY_RESERVED; | |
9f470095 | 578 | |
b088ba65 | 579 | spin_unlock_irqrestore(&rc_map->lock, flags); |
ef53a115 | 580 | |
35438946 | 581 | if (keycode != KEY_RESERVED) |
1f17f684 SY |
582 | dev_dbg(&dev->dev, "%s: scancode 0x%04x keycode 0x%02x\n", |
583 | dev->device_name, scancode, keycode); | |
9f470095 | 584 | |
b3074c0a | 585 | return keycode; |
ef53a115 | 586 | } |
ca86674b | 587 | EXPORT_SYMBOL_GPL(rc_g_keycode_from_table); |
ef53a115 | 588 | |
6660de56 | 589 | /** |
62c65031 | 590 | * ir_do_keyup() - internal function to signal the release of a keypress |
d8b4b582 | 591 | * @dev: the struct rc_dev descriptor of the device |
98c32bcd | 592 | * @sync: whether or not to call input_sync |
6660de56 | 593 | * |
62c65031 DH |
594 | * This function is used internally to release a keypress, it must be |
595 | * called with keylock held. | |
a374fef4 | 596 | */ |
98c32bcd | 597 | static void ir_do_keyup(struct rc_dev *dev, bool sync) |
a374fef4 | 598 | { |
d8b4b582 | 599 | if (!dev->keypressed) |
a374fef4 DH |
600 | return; |
601 | ||
1f17f684 | 602 | dev_dbg(&dev->dev, "keyup key 0x%04x\n", dev->last_keycode); |
fb7ccc61 | 603 | del_timer(&dev->timer_repeat); |
d8b4b582 | 604 | input_report_key(dev->input_dev, dev->last_keycode, 0); |
153a60bb | 605 | led_trigger_event(led_feedback, LED_OFF); |
98c32bcd JW |
606 | if (sync) |
607 | input_sync(dev->input_dev); | |
d8b4b582 | 608 | dev->keypressed = false; |
a374fef4 | 609 | } |
62c65031 DH |
610 | |
611 | /** | |
ca86674b | 612 | * rc_keyup() - signals the release of a keypress |
d8b4b582 | 613 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
614 | * |
615 | * This routine is used to signal that a key has been released on the | |
616 | * remote control. | |
617 | */ | |
ca86674b | 618 | void rc_keyup(struct rc_dev *dev) |
62c65031 DH |
619 | { |
620 | unsigned long flags; | |
62c65031 | 621 | |
d8b4b582 | 622 | spin_lock_irqsave(&dev->keylock, flags); |
98c32bcd | 623 | ir_do_keyup(dev, true); |
d8b4b582 | 624 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 625 | } |
ca86674b | 626 | EXPORT_SYMBOL_GPL(rc_keyup); |
a374fef4 DH |
627 | |
628 | /** | |
629 | * ir_timer_keyup() - generates a keyup event after a timeout | |
f67f366c MCC |
630 | * |
631 | * @t: a pointer to the struct timer_list | |
a374fef4 DH |
632 | * |
633 | * This routine will generate a keyup event some time after a keydown event | |
634 | * is generated when no further activity has been detected. | |
6660de56 | 635 | */ |
b17ec78a | 636 | static void ir_timer_keyup(struct timer_list *t) |
6660de56 | 637 | { |
b17ec78a | 638 | struct rc_dev *dev = from_timer(dev, t, timer_keyup); |
a374fef4 DH |
639 | unsigned long flags; |
640 | ||
641 | /* | |
642 | * ir->keyup_jiffies is used to prevent a race condition if a | |
643 | * hardware interrupt occurs at this point and the keyup timer | |
644 | * event is moved further into the future as a result. | |
645 | * | |
646 | * The timer will then be reactivated and this function called | |
647 | * again in the future. We need to exit gracefully in that case | |
648 | * to allow the input subsystem to do its auto-repeat magic or | |
649 | * a keyup event might follow immediately after the keydown. | |
650 | */ | |
d8b4b582 DH |
651 | spin_lock_irqsave(&dev->keylock, flags); |
652 | if (time_is_before_eq_jiffies(dev->keyup_jiffies)) | |
98c32bcd | 653 | ir_do_keyup(dev, true); |
d8b4b582 | 654 | spin_unlock_irqrestore(&dev->keylock, flags); |
a374fef4 DH |
655 | } |
656 | ||
57c642cb SY |
657 | /** |
658 | * ir_timer_repeat() - generates a repeat event after a timeout | |
659 | * | |
660 | * @t: a pointer to the struct timer_list | |
661 | * | |
662 | * This routine will generate a soft repeat event every REP_PERIOD | |
663 | * milliseconds. | |
664 | */ | |
665 | static void ir_timer_repeat(struct timer_list *t) | |
666 | { | |
667 | struct rc_dev *dev = from_timer(dev, t, timer_repeat); | |
668 | struct input_dev *input = dev->input_dev; | |
669 | unsigned long flags; | |
670 | ||
671 | spin_lock_irqsave(&dev->keylock, flags); | |
672 | if (dev->keypressed) { | |
673 | input_event(input, EV_KEY, dev->last_keycode, 2); | |
674 | input_sync(input); | |
675 | if (input->rep[REP_PERIOD]) | |
676 | mod_timer(&dev->timer_repeat, jiffies + | |
677 | msecs_to_jiffies(input->rep[REP_PERIOD])); | |
678 | } | |
679 | spin_unlock_irqrestore(&dev->keylock, flags); | |
680 | } | |
681 | ||
a374fef4 | 682 | /** |
ca86674b | 683 | * rc_repeat() - signals that a key is still pressed |
d8b4b582 | 684 | * @dev: the struct rc_dev descriptor of the device |
a374fef4 DH |
685 | * |
686 | * This routine is used by IR decoders when a repeat message which does | |
687 | * not include the necessary bits to reproduce the scancode has been | |
688 | * received. | |
689 | */ | |
ca86674b | 690 | void rc_repeat(struct rc_dev *dev) |
a374fef4 DH |
691 | { |
692 | unsigned long flags; | |
d57ea877 | 693 | unsigned int timeout = protocols[dev->last_protocol].repeat_period; |
b66218fd SY |
694 | struct lirc_scancode sc = { |
695 | .scancode = dev->last_scancode, .rc_proto = dev->last_protocol, | |
696 | .keycode = dev->keypressed ? dev->last_keycode : KEY_RESERVED, | |
697 | .flags = LIRC_SCANCODE_FLAG_REPEAT | | |
698 | (dev->last_toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0) | |
699 | }; | |
6660de56 | 700 | |
b66218fd | 701 | ir_lirc_scancode_event(dev, &sc); |
a374fef4 | 702 | |
b66218fd | 703 | spin_lock_irqsave(&dev->keylock, flags); |
6660de56 | 704 | |
265a2988 DH |
705 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode); |
706 | input_sync(dev->input_dev); | |
707 | ||
b66218fd SY |
708 | if (dev->keypressed) { |
709 | dev->keyup_jiffies = jiffies + msecs_to_jiffies(timeout); | |
710 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); | |
711 | } | |
a374fef4 | 712 | |
d8b4b582 | 713 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 714 | } |
ca86674b | 715 | EXPORT_SYMBOL_GPL(rc_repeat); |
6660de56 MCC |
716 | |
717 | /** | |
62c65031 | 718 | * ir_do_keydown() - internal function to process a keypress |
d8b4b582 | 719 | * @dev: the struct rc_dev descriptor of the device |
120703f9 | 720 | * @protocol: the protocol of the keypress |
62c65031 DH |
721 | * @scancode: the scancode of the keypress |
722 | * @keycode: the keycode of the keypress | |
723 | * @toggle: the toggle value of the keypress | |
6660de56 | 724 | * |
62c65031 DH |
725 | * This function is used internally to register a keypress, it must be |
726 | * called with keylock held. | |
6660de56 | 727 | */ |
6d741bfe | 728 | static void ir_do_keydown(struct rc_dev *dev, enum rc_proto protocol, |
120703f9 | 729 | u32 scancode, u32 keycode, u8 toggle) |
6660de56 | 730 | { |
99b0f3c9 | 731 | bool new_event = (!dev->keypressed || |
120703f9 | 732 | dev->last_protocol != protocol || |
99b0f3c9 | 733 | dev->last_scancode != scancode || |
120703f9 | 734 | dev->last_toggle != toggle); |
de142c32 SY |
735 | struct lirc_scancode sc = { |
736 | .scancode = scancode, .rc_proto = protocol, | |
737 | .flags = toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0, | |
738 | .keycode = keycode | |
739 | }; | |
740 | ||
741 | ir_lirc_scancode_event(dev, &sc); | |
6660de56 | 742 | |
98c32bcd JW |
743 | if (new_event && dev->keypressed) |
744 | ir_do_keyup(dev, false); | |
6660de56 | 745 | |
98c32bcd | 746 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode); |
a374fef4 | 747 | |
b66218fd SY |
748 | dev->last_protocol = protocol; |
749 | dev->last_scancode = scancode; | |
750 | dev->last_toggle = toggle; | |
751 | dev->last_keycode = keycode; | |
752 | ||
98c32bcd JW |
753 | if (new_event && keycode != KEY_RESERVED) { |
754 | /* Register a keypress */ | |
755 | dev->keypressed = true; | |
98c32bcd | 756 | |
1f17f684 SY |
757 | dev_dbg(&dev->dev, "%s: key down event, key 0x%04x, protocol 0x%04x, scancode 0x%08x\n", |
758 | dev->device_name, keycode, protocol, scancode); | |
98c32bcd | 759 | input_report_key(dev->input_dev, keycode, 1); |
70a2f912 JH |
760 | |
761 | led_trigger_event(led_feedback, LED_FULL); | |
98c32bcd | 762 | } |
ed4d3876 | 763 | |
57c642cb SY |
764 | /* |
765 | * For CEC, start sending repeat messages as soon as the first | |
766 | * repeated message is sent, as long as REP_DELAY = 0 and REP_PERIOD | |
767 | * is non-zero. Otherwise, the input layer will generate repeat | |
768 | * messages. | |
769 | */ | |
770 | if (!new_event && keycode != KEY_RESERVED && | |
771 | dev->allowed_protocols == RC_PROTO_BIT_CEC && | |
772 | !timer_pending(&dev->timer_repeat) && | |
773 | dev->input_dev->rep[REP_PERIOD] && | |
774 | !dev->input_dev->rep[REP_DELAY]) { | |
775 | input_event(dev->input_dev, EV_KEY, keycode, 2); | |
776 | mod_timer(&dev->timer_repeat, jiffies + | |
777 | msecs_to_jiffies(dev->input_dev->rep[REP_PERIOD])); | |
778 | } | |
779 | ||
d8b4b582 | 780 | input_sync(dev->input_dev); |
62c65031 | 781 | } |
6660de56 | 782 | |
62c65031 | 783 | /** |
ca86674b | 784 | * rc_keydown() - generates input event for a key press |
d8b4b582 | 785 | * @dev: the struct rc_dev descriptor of the device |
120703f9 DH |
786 | * @protocol: the protocol for the keypress |
787 | * @scancode: the scancode for the keypress | |
62c65031 DH |
788 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't |
789 | * support toggle values, this should be set to zero) | |
790 | * | |
d8b4b582 DH |
791 | * This routine is used to signal that a key has been pressed on the |
792 | * remote control. | |
62c65031 | 793 | */ |
6d741bfe SY |
794 | void rc_keydown(struct rc_dev *dev, enum rc_proto protocol, u32 scancode, |
795 | u8 toggle) | |
62c65031 DH |
796 | { |
797 | unsigned long flags; | |
ca86674b | 798 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 799 | |
d8b4b582 | 800 | spin_lock_irqsave(&dev->keylock, flags); |
120703f9 | 801 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); |
62c65031 | 802 | |
d8b4b582 | 803 | if (dev->keypressed) { |
d57ea877 SY |
804 | dev->keyup_jiffies = jiffies + |
805 | msecs_to_jiffies(protocols[protocol].repeat_period); | |
d8b4b582 | 806 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); |
62c65031 | 807 | } |
d8b4b582 | 808 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 809 | } |
ca86674b | 810 | EXPORT_SYMBOL_GPL(rc_keydown); |
6660de56 | 811 | |
62c65031 | 812 | /** |
ca86674b | 813 | * rc_keydown_notimeout() - generates input event for a key press without |
62c65031 | 814 | * an automatic keyup event at a later time |
d8b4b582 | 815 | * @dev: the struct rc_dev descriptor of the device |
120703f9 DH |
816 | * @protocol: the protocol for the keypress |
817 | * @scancode: the scancode for the keypress | |
62c65031 DH |
818 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't |
819 | * support toggle values, this should be set to zero) | |
820 | * | |
d8b4b582 | 821 | * This routine is used to signal that a key has been pressed on the |
ca86674b | 822 | * remote control. The driver must manually call rc_keyup() at a later stage. |
62c65031 | 823 | */ |
6d741bfe | 824 | void rc_keydown_notimeout(struct rc_dev *dev, enum rc_proto protocol, |
120703f9 | 825 | u32 scancode, u8 toggle) |
62c65031 DH |
826 | { |
827 | unsigned long flags; | |
ca86674b | 828 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 829 | |
d8b4b582 | 830 | spin_lock_irqsave(&dev->keylock, flags); |
120703f9 | 831 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); |
d8b4b582 | 832 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 833 | } |
ca86674b | 834 | EXPORT_SYMBOL_GPL(rc_keydown_notimeout); |
62c65031 | 835 | |
49a4b36a | 836 | /** |
6b514c4a SY |
837 | * rc_validate_scancode() - checks that a scancode is valid for a protocol. |
838 | * For nec, it should do the opposite of ir_nec_bytes_to_scancode() | |
49a4b36a SY |
839 | * @proto: protocol |
840 | * @scancode: scancode | |
841 | */ | |
842 | bool rc_validate_scancode(enum rc_proto proto, u32 scancode) | |
843 | { | |
844 | switch (proto) { | |
6b514c4a SY |
845 | /* |
846 | * NECX has a 16-bit address; if the lower 8 bits match the upper | |
847 | * 8 bits inverted, then the address would match regular nec. | |
848 | */ | |
49a4b36a SY |
849 | case RC_PROTO_NECX: |
850 | if ((((scancode >> 16) ^ ~(scancode >> 8)) & 0xff) == 0) | |
851 | return false; | |
852 | break; | |
6b514c4a SY |
853 | /* |
854 | * NEC32 has a 16 bit address and 16 bit command. If the lower 8 bits | |
855 | * of the command match the upper 8 bits inverted, then it would | |
856 | * be either NEC or NECX. | |
857 | */ | |
49a4b36a | 858 | case RC_PROTO_NEC32: |
6b514c4a | 859 | if ((((scancode >> 8) ^ ~scancode) & 0xff) == 0) |
49a4b36a SY |
860 | return false; |
861 | break; | |
6b514c4a SY |
862 | /* |
863 | * If the customer code (top 32-bit) is 0x800f, it is MCE else it | |
864 | * is regular mode-6a 32 bit | |
865 | */ | |
49a4b36a SY |
866 | case RC_PROTO_RC6_MCE: |
867 | if ((scancode & 0xffff0000) != 0x800f0000) | |
868 | return false; | |
869 | break; | |
870 | case RC_PROTO_RC6_6A_32: | |
871 | if ((scancode & 0xffff0000) == 0x800f0000) | |
872 | return false; | |
873 | break; | |
874 | default: | |
875 | break; | |
876 | } | |
877 | ||
878 | return true; | |
879 | } | |
880 | ||
b590c0bf SY |
881 | /** |
882 | * rc_validate_filter() - checks that the scancode and mask are valid and | |
883 | * provides sensible defaults | |
f423ccc1 | 884 | * @dev: the struct rc_dev descriptor of the device |
b590c0bf | 885 | * @filter: the scancode and mask |
f67f366c MCC |
886 | * |
887 | * return: 0 or -EINVAL if the filter is not valid | |
b590c0bf | 888 | */ |
f423ccc1 | 889 | static int rc_validate_filter(struct rc_dev *dev, |
b590c0bf SY |
890 | struct rc_scancode_filter *filter) |
891 | { | |
d57ea877 | 892 | u32 mask, s = filter->data; |
6d741bfe | 893 | enum rc_proto protocol = dev->wakeup_protocol; |
b590c0bf | 894 | |
d57ea877 | 895 | if (protocol >= ARRAY_SIZE(protocols)) |
2168b416 SY |
896 | return -EINVAL; |
897 | ||
d57ea877 SY |
898 | mask = protocols[protocol].scancode_bits; |
899 | ||
49a4b36a SY |
900 | if (!rc_validate_scancode(protocol, s)) |
901 | return -EINVAL; | |
b590c0bf | 902 | |
d57ea877 SY |
903 | filter->data &= mask; |
904 | filter->mask &= mask; | |
b590c0bf | 905 | |
f423ccc1 JH |
906 | /* |
907 | * If we have to raw encode the IR for wakeup, we cannot have a mask | |
908 | */ | |
d57ea877 | 909 | if (dev->encode_wakeup && filter->mask != 0 && filter->mask != mask) |
f423ccc1 JH |
910 | return -EINVAL; |
911 | ||
b590c0bf SY |
912 | return 0; |
913 | } | |
914 | ||
8b2ff320 SK |
915 | int rc_open(struct rc_dev *rdev) |
916 | { | |
917 | int rval = 0; | |
918 | ||
919 | if (!rdev) | |
920 | return -EINVAL; | |
921 | ||
922 | mutex_lock(&rdev->lock); | |
c73bbaa4 | 923 | |
cb84343f SY |
924 | if (!rdev->registered) { |
925 | rval = -ENODEV; | |
926 | } else { | |
927 | if (!rdev->users++ && rdev->open) | |
928 | rval = rdev->open(rdev); | |
8b2ff320 | 929 | |
cb84343f SY |
930 | if (rval) |
931 | rdev->users--; | |
932 | } | |
8b2ff320 SK |
933 | |
934 | mutex_unlock(&rdev->lock); | |
935 | ||
936 | return rval; | |
937 | } | |
8b2ff320 | 938 | |
d8b4b582 | 939 | static int ir_open(struct input_dev *idev) |
ef53a115 | 940 | { |
d8b4b582 | 941 | struct rc_dev *rdev = input_get_drvdata(idev); |
75543cce | 942 | |
8b2ff320 SK |
943 | return rc_open(rdev); |
944 | } | |
945 | ||
946 | void rc_close(struct rc_dev *rdev) | |
947 | { | |
948 | if (rdev) { | |
949 | mutex_lock(&rdev->lock); | |
950 | ||
cb84343f | 951 | if (!--rdev->users && rdev->close && rdev->registered) |
8b2ff320 SK |
952 | rdev->close(rdev); |
953 | ||
954 | mutex_unlock(&rdev->lock); | |
955 | } | |
ef53a115 | 956 | } |
d4b778d3 | 957 | |
d8b4b582 | 958 | static void ir_close(struct input_dev *idev) |
f6fc5049 | 959 | { |
d8b4b582 | 960 | struct rc_dev *rdev = input_get_drvdata(idev); |
8b2ff320 | 961 | rc_close(rdev); |
f6fc5049 | 962 | } |
f6fc5049 | 963 | |
bc2a6c57 | 964 | /* class for /sys/class/rc */ |
40fc5325 | 965 | static char *rc_devnode(struct device *dev, umode_t *mode) |
bc2a6c57 MCC |
966 | { |
967 | return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev)); | |
968 | } | |
969 | ||
40fc5325 | 970 | static struct class rc_class = { |
bc2a6c57 | 971 | .name = "rc", |
40fc5325 | 972 | .devnode = rc_devnode, |
bc2a6c57 MCC |
973 | }; |
974 | ||
c003ab1b DH |
975 | /* |
976 | * These are the protocol textual descriptions that are | |
977 | * used by the sysfs protocols file. Note that the order | |
978 | * of the entries is relevant. | |
979 | */ | |
53df8777 | 980 | static const struct { |
bc2a6c57 | 981 | u64 type; |
53df8777 | 982 | const char *name; |
9f0bf366 | 983 | const char *module_name; |
bc2a6c57 | 984 | } proto_names[] = { |
6d741bfe SY |
985 | { RC_PROTO_BIT_NONE, "none", NULL }, |
986 | { RC_PROTO_BIT_OTHER, "other", NULL }, | |
987 | { RC_PROTO_BIT_UNKNOWN, "unknown", NULL }, | |
988 | { RC_PROTO_BIT_RC5 | | |
989 | RC_PROTO_BIT_RC5X_20, "rc-5", "ir-rc5-decoder" }, | |
990 | { RC_PROTO_BIT_NEC | | |
991 | RC_PROTO_BIT_NECX | | |
992 | RC_PROTO_BIT_NEC32, "nec", "ir-nec-decoder" }, | |
993 | { RC_PROTO_BIT_RC6_0 | | |
994 | RC_PROTO_BIT_RC6_6A_20 | | |
995 | RC_PROTO_BIT_RC6_6A_24 | | |
996 | RC_PROTO_BIT_RC6_6A_32 | | |
997 | RC_PROTO_BIT_RC6_MCE, "rc-6", "ir-rc6-decoder" }, | |
998 | { RC_PROTO_BIT_JVC, "jvc", "ir-jvc-decoder" }, | |
999 | { RC_PROTO_BIT_SONY12 | | |
1000 | RC_PROTO_BIT_SONY15 | | |
1001 | RC_PROTO_BIT_SONY20, "sony", "ir-sony-decoder" }, | |
1002 | { RC_PROTO_BIT_RC5_SZ, "rc-5-sz", "ir-rc5-decoder" }, | |
1003 | { RC_PROTO_BIT_SANYO, "sanyo", "ir-sanyo-decoder" }, | |
1004 | { RC_PROTO_BIT_SHARP, "sharp", "ir-sharp-decoder" }, | |
1005 | { RC_PROTO_BIT_MCIR2_KBD | | |
1006 | RC_PROTO_BIT_MCIR2_MSE, "mce_kbd", "ir-mce_kbd-decoder" }, | |
1007 | { RC_PROTO_BIT_XMP, "xmp", "ir-xmp-decoder" }, | |
1008 | { RC_PROTO_BIT_CEC, "cec", NULL }, | |
447dcc0c | 1009 | { RC_PROTO_BIT_IMON, "imon", "ir-imon-decoder" }, |
bc2a6c57 MCC |
1010 | }; |
1011 | ||
bc2a6c57 | 1012 | /** |
ab88c66d JH |
1013 | * struct rc_filter_attribute - Device attribute relating to a filter type. |
1014 | * @attr: Device attribute. | |
1015 | * @type: Filter type. | |
1016 | * @mask: false for filter value, true for filter mask. | |
1017 | */ | |
1018 | struct rc_filter_attribute { | |
1019 | struct device_attribute attr; | |
1020 | enum rc_filter_type type; | |
1021 | bool mask; | |
1022 | }; | |
1023 | #define to_rc_filter_attr(a) container_of(a, struct rc_filter_attribute, attr) | |
1024 | ||
ab88c66d JH |
1025 | #define RC_FILTER_ATTR(_name, _mode, _show, _store, _type, _mask) \ |
1026 | struct rc_filter_attribute dev_attr_##_name = { \ | |
1027 | .attr = __ATTR(_name, _mode, _show, _store), \ | |
1028 | .type = (_type), \ | |
1029 | .mask = (_mask), \ | |
1030 | } | |
1031 | ||
1032 | /** | |
0751d33c | 1033 | * show_protocols() - shows the current IR protocol(s) |
d8b4b582 | 1034 | * @device: the device descriptor |
da6e162d | 1035 | * @mattr: the device attribute struct |
bc2a6c57 MCC |
1036 | * @buf: a pointer to the output buffer |
1037 | * | |
1038 | * This routine is a callback routine for input read the IR protocol type(s). | |
0751d33c | 1039 | * it is trigged by reading /sys/class/rc/rc?/protocols. |
bc2a6c57 MCC |
1040 | * It returns the protocol names of supported protocols. |
1041 | * Enabled protocols are printed in brackets. | |
08aeb7c9 | 1042 | * |
18726a34 DH |
1043 | * dev->lock is taken to guard against races between |
1044 | * store_protocols and show_protocols. | |
bc2a6c57 | 1045 | */ |
d8b4b582 | 1046 | static ssize_t show_protocols(struct device *device, |
bc2a6c57 MCC |
1047 | struct device_attribute *mattr, char *buf) |
1048 | { | |
d8b4b582 | 1049 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 MCC |
1050 | u64 allowed, enabled; |
1051 | char *tmp = buf; | |
1052 | int i; | |
1053 | ||
08aeb7c9 JW |
1054 | mutex_lock(&dev->lock); |
1055 | ||
0751d33c SY |
1056 | enabled = dev->enabled_protocols; |
1057 | allowed = dev->allowed_protocols; | |
1058 | if (dev->raw && !allowed) | |
1059 | allowed = ir_raw_get_allowed_protocols(); | |
bc2a6c57 | 1060 | |
da6e162d DH |
1061 | mutex_unlock(&dev->lock); |
1062 | ||
1f17f684 SY |
1063 | dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - 0x%llx\n", |
1064 | __func__, (long long)allowed, (long long)enabled); | |
bc2a6c57 MCC |
1065 | |
1066 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
1067 | if (allowed & enabled & proto_names[i].type) | |
1068 | tmp += sprintf(tmp, "[%s] ", proto_names[i].name); | |
1069 | else if (allowed & proto_names[i].type) | |
1070 | tmp += sprintf(tmp, "%s ", proto_names[i].name); | |
c003ab1b DH |
1071 | |
1072 | if (allowed & proto_names[i].type) | |
1073 | allowed &= ~proto_names[i].type; | |
bc2a6c57 MCC |
1074 | } |
1075 | ||
a60d64b1 SY |
1076 | #ifdef CONFIG_LIRC |
1077 | if (dev->driver_type == RC_DRIVER_IR_RAW) | |
275ddb40 | 1078 | tmp += sprintf(tmp, "[lirc] "); |
a60d64b1 | 1079 | #endif |
275ddb40 | 1080 | |
bc2a6c57 MCC |
1081 | if (tmp != buf) |
1082 | tmp--; | |
1083 | *tmp = '\n'; | |
08aeb7c9 | 1084 | |
bc2a6c57 MCC |
1085 | return tmp + 1 - buf; |
1086 | } | |
1087 | ||
1088 | /** | |
da6e162d | 1089 | * parse_protocol_change() - parses a protocol change request |
1f17f684 | 1090 | * @dev: rc_dev device |
da6e162d DH |
1091 | * @protocols: pointer to the bitmask of current protocols |
1092 | * @buf: pointer to the buffer with a list of changes | |
bc2a6c57 | 1093 | * |
da6e162d DH |
1094 | * Writing "+proto" will add a protocol to the protocol mask. |
1095 | * Writing "-proto" will remove a protocol from protocol mask. | |
bc2a6c57 MCC |
1096 | * Writing "proto" will enable only "proto". |
1097 | * Writing "none" will disable all protocols. | |
da6e162d | 1098 | * Returns the number of changes performed or a negative error code. |
bc2a6c57 | 1099 | */ |
1f17f684 SY |
1100 | static int parse_protocol_change(struct rc_dev *dev, u64 *protocols, |
1101 | const char *buf) | |
bc2a6c57 | 1102 | { |
bc2a6c57 | 1103 | const char *tmp; |
da6e162d DH |
1104 | unsigned count = 0; |
1105 | bool enable, disable; | |
bc2a6c57 | 1106 | u64 mask; |
da6e162d | 1107 | int i; |
bc2a6c57 | 1108 | |
da6e162d | 1109 | while ((tmp = strsep((char **)&buf, " \n")) != NULL) { |
bc2a6c57 MCC |
1110 | if (!*tmp) |
1111 | break; | |
1112 | ||
1113 | if (*tmp == '+') { | |
1114 | enable = true; | |
1115 | disable = false; | |
1116 | tmp++; | |
1117 | } else if (*tmp == '-') { | |
1118 | enable = false; | |
1119 | disable = true; | |
1120 | tmp++; | |
1121 | } else { | |
1122 | enable = false; | |
1123 | disable = false; | |
1124 | } | |
1125 | ||
c003ab1b DH |
1126 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { |
1127 | if (!strcasecmp(tmp, proto_names[i].name)) { | |
1128 | mask = proto_names[i].type; | |
1129 | break; | |
bc2a6c57 | 1130 | } |
bc2a6c57 MCC |
1131 | } |
1132 | ||
c003ab1b | 1133 | if (i == ARRAY_SIZE(proto_names)) { |
275ddb40 DH |
1134 | if (!strcasecmp(tmp, "lirc")) |
1135 | mask = 0; | |
1136 | else { | |
1f17f684 SY |
1137 | dev_dbg(&dev->dev, "Unknown protocol: '%s'\n", |
1138 | tmp); | |
275ddb40 DH |
1139 | return -EINVAL; |
1140 | } | |
c003ab1b DH |
1141 | } |
1142 | ||
1143 | count++; | |
1144 | ||
bc2a6c57 | 1145 | if (enable) |
da6e162d | 1146 | *protocols |= mask; |
bc2a6c57 | 1147 | else if (disable) |
da6e162d | 1148 | *protocols &= ~mask; |
bc2a6c57 | 1149 | else |
da6e162d | 1150 | *protocols = mask; |
bc2a6c57 MCC |
1151 | } |
1152 | ||
1153 | if (!count) { | |
1f17f684 | 1154 | dev_dbg(&dev->dev, "Protocol not specified\n"); |
da6e162d DH |
1155 | return -EINVAL; |
1156 | } | |
1157 | ||
1158 | return count; | |
1159 | } | |
1160 | ||
0d39ab0b | 1161 | void ir_raw_load_modules(u64 *protocols) |
9f0bf366 HK |
1162 | { |
1163 | u64 available; | |
1164 | int i, ret; | |
1165 | ||
1166 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
6d741bfe SY |
1167 | if (proto_names[i].type == RC_PROTO_BIT_NONE || |
1168 | proto_names[i].type & (RC_PROTO_BIT_OTHER | | |
1169 | RC_PROTO_BIT_UNKNOWN)) | |
9f0bf366 HK |
1170 | continue; |
1171 | ||
1172 | available = ir_raw_get_allowed_protocols(); | |
1173 | if (!(*protocols & proto_names[i].type & ~available)) | |
1174 | continue; | |
1175 | ||
1176 | if (!proto_names[i].module_name) { | |
1177 | pr_err("Can't enable IR protocol %s\n", | |
1178 | proto_names[i].name); | |
1179 | *protocols &= ~proto_names[i].type; | |
1180 | continue; | |
1181 | } | |
1182 | ||
1183 | ret = request_module("%s", proto_names[i].module_name); | |
1184 | if (ret < 0) { | |
1185 | pr_err("Couldn't load IR protocol module %s\n", | |
1186 | proto_names[i].module_name); | |
1187 | *protocols &= ~proto_names[i].type; | |
1188 | continue; | |
1189 | } | |
1190 | msleep(20); | |
1191 | available = ir_raw_get_allowed_protocols(); | |
1192 | if (!(*protocols & proto_names[i].type & ~available)) | |
1193 | continue; | |
1194 | ||
8caebcdc | 1195 | pr_err("Loaded IR protocol module %s, but protocol %s still not available\n", |
9f0bf366 HK |
1196 | proto_names[i].module_name, |
1197 | proto_names[i].name); | |
1198 | *protocols &= ~proto_names[i].type; | |
1199 | } | |
1200 | } | |
1201 | ||
da6e162d DH |
1202 | /** |
1203 | * store_protocols() - changes the current/wakeup IR protocol(s) | |
1204 | * @device: the device descriptor | |
1205 | * @mattr: the device attribute struct | |
1206 | * @buf: a pointer to the input buffer | |
1207 | * @len: length of the input buffer | |
1208 | * | |
1209 | * This routine is for changing the IR protocol type. | |
1210 | * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]protocols. | |
1211 | * See parse_protocol_change() for the valid commands. | |
1212 | * Returns @len on success or a negative error code. | |
1213 | * | |
18726a34 DH |
1214 | * dev->lock is taken to guard against races between |
1215 | * store_protocols and show_protocols. | |
da6e162d DH |
1216 | */ |
1217 | static ssize_t store_protocols(struct device *device, | |
1218 | struct device_attribute *mattr, | |
1219 | const char *buf, size_t len) | |
1220 | { | |
1221 | struct rc_dev *dev = to_rc_dev(device); | |
da6e162d | 1222 | u64 *current_protocols; |
da6e162d | 1223 | struct rc_scancode_filter *filter; |
da6e162d DH |
1224 | u64 old_protocols, new_protocols; |
1225 | ssize_t rc; | |
1226 | ||
1f17f684 | 1227 | dev_dbg(&dev->dev, "Normal protocol change requested\n"); |
0751d33c SY |
1228 | current_protocols = &dev->enabled_protocols; |
1229 | filter = &dev->scancode_filter; | |
da6e162d | 1230 | |
0751d33c | 1231 | if (!dev->change_protocol) { |
1f17f684 | 1232 | dev_dbg(&dev->dev, "Protocol switching not supported\n"); |
da6e162d DH |
1233 | return -EINVAL; |
1234 | } | |
1235 | ||
1236 | mutex_lock(&dev->lock); | |
1237 | ||
1238 | old_protocols = *current_protocols; | |
1239 | new_protocols = old_protocols; | |
1f17f684 | 1240 | rc = parse_protocol_change(dev, &new_protocols, buf); |
da6e162d DH |
1241 | if (rc < 0) |
1242 | goto out; | |
1243 | ||
a86d6df8 SY |
1244 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1245 | ir_raw_load_modules(&new_protocols); | |
1246 | ||
0751d33c | 1247 | rc = dev->change_protocol(dev, &new_protocols); |
da6e162d | 1248 | if (rc < 0) { |
1f17f684 SY |
1249 | dev_dbg(&dev->dev, "Error setting protocols to 0x%llx\n", |
1250 | (long long)new_protocols); | |
08aeb7c9 | 1251 | goto out; |
bc2a6c57 MCC |
1252 | } |
1253 | ||
983c5bd2 JH |
1254 | if (new_protocols != old_protocols) { |
1255 | *current_protocols = new_protocols; | |
1f17f684 SY |
1256 | dev_dbg(&dev->dev, "Protocols changed to 0x%llx\n", |
1257 | (long long)new_protocols); | |
bc2a6c57 MCC |
1258 | } |
1259 | ||
6bea25af | 1260 | /* |
983c5bd2 JH |
1261 | * If a protocol change was attempted the filter may need updating, even |
1262 | * if the actual protocol mask hasn't changed (since the driver may have | |
1263 | * cleared the filter). | |
6bea25af JH |
1264 | * Try setting the same filter with the new protocol (if any). |
1265 | * Fall back to clearing the filter. | |
1266 | */ | |
0751d33c | 1267 | if (dev->s_filter && filter->mask) { |
da6e162d | 1268 | if (new_protocols) |
0751d33c | 1269 | rc = dev->s_filter(dev, filter); |
da6e162d DH |
1270 | else |
1271 | rc = -1; | |
6bea25af | 1272 | |
da6e162d DH |
1273 | if (rc < 0) { |
1274 | filter->data = 0; | |
1275 | filter->mask = 0; | |
0751d33c | 1276 | dev->s_filter(dev, filter); |
da6e162d | 1277 | } |
6bea25af JH |
1278 | } |
1279 | ||
da6e162d | 1280 | rc = len; |
08aeb7c9 JW |
1281 | |
1282 | out: | |
1283 | mutex_unlock(&dev->lock); | |
da6e162d | 1284 | return rc; |
bc2a6c57 MCC |
1285 | } |
1286 | ||
00942d1a JH |
1287 | /** |
1288 | * show_filter() - shows the current scancode filter value or mask | |
1289 | * @device: the device descriptor | |
1290 | * @attr: the device attribute struct | |
1291 | * @buf: a pointer to the output buffer | |
1292 | * | |
1293 | * This routine is a callback routine to read a scancode filter value or mask. | |
1294 | * It is trigged by reading /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1295 | * It prints the current scancode filter value or mask of the appropriate filter | |
1296 | * type in hexadecimal into @buf and returns the size of the buffer. | |
1297 | * | |
1298 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1299 | * compared against input scancodes and non-matching scancodes are discarded. | |
1300 | * | |
18726a34 | 1301 | * dev->lock is taken to guard against races between |
00942d1a JH |
1302 | * store_filter and show_filter. |
1303 | */ | |
1304 | static ssize_t show_filter(struct device *device, | |
1305 | struct device_attribute *attr, | |
1306 | char *buf) | |
1307 | { | |
1308 | struct rc_dev *dev = to_rc_dev(device); | |
1309 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
da6e162d | 1310 | struct rc_scancode_filter *filter; |
00942d1a JH |
1311 | u32 val; |
1312 | ||
c73bbaa4 | 1313 | mutex_lock(&dev->lock); |
c73bbaa4 | 1314 | |
da6e162d | 1315 | if (fattr->type == RC_FILTER_NORMAL) |
c5540fbb | 1316 | filter = &dev->scancode_filter; |
da6e162d | 1317 | else |
c5540fbb | 1318 | filter = &dev->scancode_wakeup_filter; |
da6e162d | 1319 | |
da6e162d DH |
1320 | if (fattr->mask) |
1321 | val = filter->mask; | |
00942d1a | 1322 | else |
da6e162d | 1323 | val = filter->data; |
00942d1a JH |
1324 | mutex_unlock(&dev->lock); |
1325 | ||
1326 | return sprintf(buf, "%#x\n", val); | |
1327 | } | |
1328 | ||
1329 | /** | |
1330 | * store_filter() - changes the scancode filter value | |
1331 | * @device: the device descriptor | |
1332 | * @attr: the device attribute struct | |
1333 | * @buf: a pointer to the input buffer | |
1334 | * @len: length of the input buffer | |
1335 | * | |
1336 | * This routine is for changing a scancode filter value or mask. | |
1337 | * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]filter[_mask]. | |
1338 | * Returns -EINVAL if an invalid filter value for the current protocol was | |
1339 | * specified or if scancode filtering is not supported by the driver, otherwise | |
1340 | * returns @len. | |
1341 | * | |
1342 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1343 | * compared against input scancodes and non-matching scancodes are discarded. | |
1344 | * | |
18726a34 | 1345 | * dev->lock is taken to guard against races between |
00942d1a JH |
1346 | * store_filter and show_filter. |
1347 | */ | |
1348 | static ssize_t store_filter(struct device *device, | |
1349 | struct device_attribute *attr, | |
da6e162d | 1350 | const char *buf, size_t len) |
00942d1a JH |
1351 | { |
1352 | struct rc_dev *dev = to_rc_dev(device); | |
1353 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
da6e162d | 1354 | struct rc_scancode_filter new_filter, *filter; |
00942d1a JH |
1355 | int ret; |
1356 | unsigned long val; | |
23c843b5 | 1357 | int (*set_filter)(struct rc_dev *dev, struct rc_scancode_filter *filter); |
00942d1a | 1358 | |
00942d1a JH |
1359 | ret = kstrtoul(buf, 0, &val); |
1360 | if (ret < 0) | |
1361 | return ret; | |
1362 | ||
da6e162d DH |
1363 | if (fattr->type == RC_FILTER_NORMAL) { |
1364 | set_filter = dev->s_filter; | |
c5540fbb | 1365 | filter = &dev->scancode_filter; |
da6e162d DH |
1366 | } else { |
1367 | set_filter = dev->s_wakeup_filter; | |
c5540fbb | 1368 | filter = &dev->scancode_wakeup_filter; |
da6e162d DH |
1369 | } |
1370 | ||
99b0f3c9 DH |
1371 | if (!set_filter) |
1372 | return -EINVAL; | |
00942d1a JH |
1373 | |
1374 | mutex_lock(&dev->lock); | |
1375 | ||
da6e162d | 1376 | new_filter = *filter; |
00942d1a | 1377 | if (fattr->mask) |
da6e162d | 1378 | new_filter.mask = val; |
00942d1a | 1379 | else |
da6e162d | 1380 | new_filter.data = val; |
23c843b5 | 1381 | |
0751d33c | 1382 | if (fattr->type == RC_FILTER_WAKEUP) { |
b590c0bf SY |
1383 | /* |
1384 | * Refuse to set a filter unless a protocol is enabled | |
1385 | * and the filter is valid for that protocol | |
1386 | */ | |
6d741bfe | 1387 | if (dev->wakeup_protocol != RC_PROTO_UNKNOWN) |
f423ccc1 | 1388 | ret = rc_validate_filter(dev, &new_filter); |
b590c0bf | 1389 | else |
0751d33c | 1390 | ret = -EINVAL; |
b590c0bf SY |
1391 | |
1392 | if (ret != 0) | |
0751d33c | 1393 | goto unlock; |
0751d33c SY |
1394 | } |
1395 | ||
1396 | if (fattr->type == RC_FILTER_NORMAL && !dev->enabled_protocols && | |
1397 | val) { | |
6bea25af JH |
1398 | /* refuse to set a filter unless a protocol is enabled */ |
1399 | ret = -EINVAL; | |
1400 | goto unlock; | |
1401 | } | |
23c843b5 | 1402 | |
da6e162d | 1403 | ret = set_filter(dev, &new_filter); |
99b0f3c9 DH |
1404 | if (ret < 0) |
1405 | goto unlock; | |
00942d1a | 1406 | |
da6e162d | 1407 | *filter = new_filter; |
00942d1a JH |
1408 | |
1409 | unlock: | |
1410 | mutex_unlock(&dev->lock); | |
da6e162d | 1411 | return (ret < 0) ? ret : len; |
00942d1a JH |
1412 | } |
1413 | ||
0751d33c SY |
1414 | /** |
1415 | * show_wakeup_protocols() - shows the wakeup IR protocol | |
1416 | * @device: the device descriptor | |
1417 | * @mattr: the device attribute struct | |
1418 | * @buf: a pointer to the output buffer | |
1419 | * | |
1420 | * This routine is a callback routine for input read the IR protocol type(s). | |
1421 | * it is trigged by reading /sys/class/rc/rc?/wakeup_protocols. | |
1422 | * It returns the protocol names of supported protocols. | |
1423 | * The enabled protocols are printed in brackets. | |
1424 | * | |
18726a34 DH |
1425 | * dev->lock is taken to guard against races between |
1426 | * store_wakeup_protocols and show_wakeup_protocols. | |
0751d33c SY |
1427 | */ |
1428 | static ssize_t show_wakeup_protocols(struct device *device, | |
1429 | struct device_attribute *mattr, | |
1430 | char *buf) | |
1431 | { | |
1432 | struct rc_dev *dev = to_rc_dev(device); | |
1433 | u64 allowed; | |
6d741bfe | 1434 | enum rc_proto enabled; |
0751d33c SY |
1435 | char *tmp = buf; |
1436 | int i; | |
1437 | ||
0751d33c SY |
1438 | mutex_lock(&dev->lock); |
1439 | ||
1440 | allowed = dev->allowed_wakeup_protocols; | |
1441 | enabled = dev->wakeup_protocol; | |
1442 | ||
1443 | mutex_unlock(&dev->lock); | |
1444 | ||
1f17f684 SY |
1445 | dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - %d\n", |
1446 | __func__, (long long)allowed, enabled); | |
0751d33c | 1447 | |
d57ea877 | 1448 | for (i = 0; i < ARRAY_SIZE(protocols); i++) { |
0751d33c SY |
1449 | if (allowed & (1ULL << i)) { |
1450 | if (i == enabled) | |
d57ea877 | 1451 | tmp += sprintf(tmp, "[%s] ", protocols[i].name); |
0751d33c | 1452 | else |
d57ea877 | 1453 | tmp += sprintf(tmp, "%s ", protocols[i].name); |
0751d33c SY |
1454 | } |
1455 | } | |
1456 | ||
1457 | if (tmp != buf) | |
1458 | tmp--; | |
1459 | *tmp = '\n'; | |
1460 | ||
1461 | return tmp + 1 - buf; | |
1462 | } | |
1463 | ||
1464 | /** | |
1465 | * store_wakeup_protocols() - changes the wakeup IR protocol(s) | |
1466 | * @device: the device descriptor | |
1467 | * @mattr: the device attribute struct | |
1468 | * @buf: a pointer to the input buffer | |
1469 | * @len: length of the input buffer | |
1470 | * | |
1471 | * This routine is for changing the IR protocol type. | |
1472 | * It is trigged by writing to /sys/class/rc/rc?/wakeup_protocols. | |
1473 | * Returns @len on success or a negative error code. | |
1474 | * | |
18726a34 DH |
1475 | * dev->lock is taken to guard against races between |
1476 | * store_wakeup_protocols and show_wakeup_protocols. | |
0751d33c SY |
1477 | */ |
1478 | static ssize_t store_wakeup_protocols(struct device *device, | |
1479 | struct device_attribute *mattr, | |
1480 | const char *buf, size_t len) | |
1481 | { | |
1482 | struct rc_dev *dev = to_rc_dev(device); | |
6d741bfe | 1483 | enum rc_proto protocol; |
0751d33c SY |
1484 | ssize_t rc; |
1485 | u64 allowed; | |
1486 | int i; | |
1487 | ||
0751d33c SY |
1488 | mutex_lock(&dev->lock); |
1489 | ||
1490 | allowed = dev->allowed_wakeup_protocols; | |
1491 | ||
1492 | if (sysfs_streq(buf, "none")) { | |
6d741bfe | 1493 | protocol = RC_PROTO_UNKNOWN; |
0751d33c | 1494 | } else { |
d57ea877 | 1495 | for (i = 0; i < ARRAY_SIZE(protocols); i++) { |
0751d33c | 1496 | if ((allowed & (1ULL << i)) && |
d57ea877 | 1497 | sysfs_streq(buf, protocols[i].name)) { |
0751d33c SY |
1498 | protocol = i; |
1499 | break; | |
1500 | } | |
1501 | } | |
1502 | ||
d57ea877 | 1503 | if (i == ARRAY_SIZE(protocols)) { |
0751d33c SY |
1504 | rc = -EINVAL; |
1505 | goto out; | |
1506 | } | |
f423ccc1 JH |
1507 | |
1508 | if (dev->encode_wakeup) { | |
1509 | u64 mask = 1ULL << protocol; | |
1510 | ||
1511 | ir_raw_load_modules(&mask); | |
1512 | if (!mask) { | |
1513 | rc = -EINVAL; | |
1514 | goto out; | |
1515 | } | |
1516 | } | |
0751d33c SY |
1517 | } |
1518 | ||
1519 | if (dev->wakeup_protocol != protocol) { | |
1520 | dev->wakeup_protocol = protocol; | |
1f17f684 | 1521 | dev_dbg(&dev->dev, "Wakeup protocol changed to %d\n", protocol); |
0751d33c | 1522 | |
6d741bfe | 1523 | if (protocol == RC_PROTO_RC6_MCE) |
0751d33c SY |
1524 | dev->scancode_wakeup_filter.data = 0x800f0000; |
1525 | else | |
1526 | dev->scancode_wakeup_filter.data = 0; | |
1527 | dev->scancode_wakeup_filter.mask = 0; | |
1528 | ||
1529 | rc = dev->s_wakeup_filter(dev, &dev->scancode_wakeup_filter); | |
1530 | if (rc == 0) | |
1531 | rc = len; | |
1532 | } else { | |
1533 | rc = len; | |
1534 | } | |
1535 | ||
1536 | out: | |
1537 | mutex_unlock(&dev->lock); | |
1538 | return rc; | |
1539 | } | |
1540 | ||
d8b4b582 DH |
1541 | static void rc_dev_release(struct device *device) |
1542 | { | |
47cae1e1 MK |
1543 | struct rc_dev *dev = to_rc_dev(device); |
1544 | ||
1545 | kfree(dev); | |
d8b4b582 DH |
1546 | } |
1547 | ||
bc2a6c57 MCC |
1548 | #define ADD_HOTPLUG_VAR(fmt, val...) \ |
1549 | do { \ | |
1550 | int err = add_uevent_var(env, fmt, val); \ | |
1551 | if (err) \ | |
1552 | return err; \ | |
1553 | } while (0) | |
1554 | ||
1555 | static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) | |
1556 | { | |
d8b4b582 | 1557 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 | 1558 | |
b088ba65 MCC |
1559 | if (dev->rc_map.name) |
1560 | ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name); | |
d8b4b582 DH |
1561 | if (dev->driver_name) |
1562 | ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name); | |
b9f407e3 SY |
1563 | if (dev->device_name) |
1564 | ADD_HOTPLUG_VAR("DEV_NAME=%s", dev->device_name); | |
bc2a6c57 MCC |
1565 | |
1566 | return 0; | |
1567 | } | |
1568 | ||
1569 | /* | |
1570 | * Static device attribute struct with the sysfs attributes for IR's | |
1571 | */ | |
6d75db30 SY |
1572 | static struct device_attribute dev_attr_ro_protocols = |
1573 | __ATTR(protocols, 0444, show_protocols, NULL); | |
1574 | static struct device_attribute dev_attr_rw_protocols = | |
1575 | __ATTR(protocols, 0644, show_protocols, store_protocols); | |
0751d33c SY |
1576 | static DEVICE_ATTR(wakeup_protocols, 0644, show_wakeup_protocols, |
1577 | store_wakeup_protocols); | |
00942d1a JH |
1578 | static RC_FILTER_ATTR(filter, S_IRUGO|S_IWUSR, |
1579 | show_filter, store_filter, RC_FILTER_NORMAL, false); | |
1580 | static RC_FILTER_ATTR(filter_mask, S_IRUGO|S_IWUSR, | |
1581 | show_filter, store_filter, RC_FILTER_NORMAL, true); | |
1582 | static RC_FILTER_ATTR(wakeup_filter, S_IRUGO|S_IWUSR, | |
1583 | show_filter, store_filter, RC_FILTER_WAKEUP, false); | |
1584 | static RC_FILTER_ATTR(wakeup_filter_mask, S_IRUGO|S_IWUSR, | |
1585 | show_filter, store_filter, RC_FILTER_WAKEUP, true); | |
bc2a6c57 | 1586 | |
6d75db30 SY |
1587 | static struct attribute *rc_dev_rw_protocol_attrs[] = { |
1588 | &dev_attr_rw_protocols.attr, | |
99b0f3c9 DH |
1589 | NULL, |
1590 | }; | |
1591 | ||
6d75db30 SY |
1592 | static const struct attribute_group rc_dev_rw_protocol_attr_grp = { |
1593 | .attrs = rc_dev_rw_protocol_attrs, | |
1594 | }; | |
1595 | ||
1596 | static struct attribute *rc_dev_ro_protocol_attrs[] = { | |
1597 | &dev_attr_ro_protocols.attr, | |
1598 | NULL, | |
1599 | }; | |
1600 | ||
1601 | static const struct attribute_group rc_dev_ro_protocol_attr_grp = { | |
1602 | .attrs = rc_dev_ro_protocol_attrs, | |
99b0f3c9 DH |
1603 | }; |
1604 | ||
99b0f3c9 | 1605 | static struct attribute *rc_dev_filter_attrs[] = { |
00942d1a JH |
1606 | &dev_attr_filter.attr.attr, |
1607 | &dev_attr_filter_mask.attr.attr, | |
bc2a6c57 MCC |
1608 | NULL, |
1609 | }; | |
1610 | ||
db68102c | 1611 | static const struct attribute_group rc_dev_filter_attr_grp = { |
99b0f3c9 | 1612 | .attrs = rc_dev_filter_attrs, |
bc2a6c57 MCC |
1613 | }; |
1614 | ||
99b0f3c9 DH |
1615 | static struct attribute *rc_dev_wakeup_filter_attrs[] = { |
1616 | &dev_attr_wakeup_filter.attr.attr, | |
1617 | &dev_attr_wakeup_filter_mask.attr.attr, | |
0751d33c | 1618 | &dev_attr_wakeup_protocols.attr, |
99b0f3c9 DH |
1619 | NULL, |
1620 | }; | |
1621 | ||
db68102c | 1622 | static const struct attribute_group rc_dev_wakeup_filter_attr_grp = { |
99b0f3c9 | 1623 | .attrs = rc_dev_wakeup_filter_attrs, |
bc2a6c57 MCC |
1624 | }; |
1625 | ||
f03f02f9 | 1626 | static const struct device_type rc_dev_type = { |
d8b4b582 | 1627 | .release = rc_dev_release, |
bc2a6c57 MCC |
1628 | .uevent = rc_dev_uevent, |
1629 | }; | |
1630 | ||
0f7499fd | 1631 | struct rc_dev *rc_allocate_device(enum rc_driver_type type) |
bc2a6c57 | 1632 | { |
d8b4b582 | 1633 | struct rc_dev *dev; |
bc2a6c57 | 1634 | |
d8b4b582 DH |
1635 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1636 | if (!dev) | |
1637 | return NULL; | |
1638 | ||
d34aee10 AS |
1639 | if (type != RC_DRIVER_IR_RAW_TX) { |
1640 | dev->input_dev = input_allocate_device(); | |
1641 | if (!dev->input_dev) { | |
1642 | kfree(dev); | |
1643 | return NULL; | |
1644 | } | |
1645 | ||
1646 | dev->input_dev->getkeycode = ir_getkeycode; | |
1647 | dev->input_dev->setkeycode = ir_setkeycode; | |
1648 | input_set_drvdata(dev->input_dev, dev); | |
d8b4b582 | 1649 | |
b17ec78a | 1650 | timer_setup(&dev->timer_keyup, ir_timer_keyup, 0); |
57c642cb | 1651 | timer_setup(&dev->timer_repeat, ir_timer_repeat, 0); |
d8b4b582 | 1652 | |
d34aee10 AS |
1653 | spin_lock_init(&dev->rc_map.lock); |
1654 | spin_lock_init(&dev->keylock); | |
1655 | } | |
08aeb7c9 | 1656 | mutex_init(&dev->lock); |
bc2a6c57 | 1657 | |
d8b4b582 | 1658 | dev->dev.type = &rc_dev_type; |
40fc5325 | 1659 | dev->dev.class = &rc_class; |
d8b4b582 DH |
1660 | device_initialize(&dev->dev); |
1661 | ||
0f7499fd AS |
1662 | dev->driver_type = type; |
1663 | ||
d8b4b582 DH |
1664 | __module_get(THIS_MODULE); |
1665 | return dev; | |
1666 | } | |
1667 | EXPORT_SYMBOL_GPL(rc_allocate_device); | |
1668 | ||
1669 | void rc_free_device(struct rc_dev *dev) | |
bc2a6c57 | 1670 | { |
b05681b9 MCC |
1671 | if (!dev) |
1672 | return; | |
1673 | ||
3dd94f00 | 1674 | input_free_device(dev->input_dev); |
b05681b9 MCC |
1675 | |
1676 | put_device(&dev->dev); | |
1677 | ||
47cae1e1 MK |
1678 | /* kfree(dev) will be called by the callback function |
1679 | rc_dev_release() */ | |
1680 | ||
b05681b9 | 1681 | module_put(THIS_MODULE); |
d8b4b582 DH |
1682 | } |
1683 | EXPORT_SYMBOL_GPL(rc_free_device); | |
1684 | ||
ddbf7d5a HK |
1685 | static void devm_rc_alloc_release(struct device *dev, void *res) |
1686 | { | |
1687 | rc_free_device(*(struct rc_dev **)res); | |
1688 | } | |
1689 | ||
0f7499fd AS |
1690 | struct rc_dev *devm_rc_allocate_device(struct device *dev, |
1691 | enum rc_driver_type type) | |
ddbf7d5a HK |
1692 | { |
1693 | struct rc_dev **dr, *rc; | |
1694 | ||
1695 | dr = devres_alloc(devm_rc_alloc_release, sizeof(*dr), GFP_KERNEL); | |
1696 | if (!dr) | |
1697 | return NULL; | |
1698 | ||
0f7499fd | 1699 | rc = rc_allocate_device(type); |
ddbf7d5a HK |
1700 | if (!rc) { |
1701 | devres_free(dr); | |
1702 | return NULL; | |
1703 | } | |
1704 | ||
1705 | rc->dev.parent = dev; | |
1706 | rc->managed_alloc = true; | |
1707 | *dr = rc; | |
1708 | devres_add(dev, dr); | |
1709 | ||
1710 | return rc; | |
1711 | } | |
1712 | EXPORT_SYMBOL_GPL(devm_rc_allocate_device); | |
1713 | ||
f56928ab | 1714 | static int rc_prepare_rx_device(struct rc_dev *dev) |
d8b4b582 | 1715 | { |
fcb13097 | 1716 | int rc; |
7ff2c2bc | 1717 | struct rc_map *rc_map; |
6d741bfe | 1718 | u64 rc_proto; |
bc2a6c57 | 1719 | |
7ff2c2bc | 1720 | if (!dev->map_name) |
d8b4b582 | 1721 | return -EINVAL; |
bc2a6c57 | 1722 | |
d100e659 | 1723 | rc_map = rc_map_get(dev->map_name); |
b088ba65 | 1724 | if (!rc_map) |
d100e659 | 1725 | rc_map = rc_map_get(RC_MAP_EMPTY); |
b088ba65 | 1726 | if (!rc_map || !rc_map->scan || rc_map->size == 0) |
d8b4b582 DH |
1727 | return -EINVAL; |
1728 | ||
7ff2c2bc AS |
1729 | rc = ir_setkeytable(dev, rc_map); |
1730 | if (rc) | |
1731 | return rc; | |
1732 | ||
6d741bfe | 1733 | rc_proto = BIT_ULL(rc_map->rc_proto); |
7ff2c2bc | 1734 | |
831c4c81 SY |
1735 | if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol) |
1736 | dev->enabled_protocols = dev->allowed_protocols; | |
1737 | ||
a86d6df8 SY |
1738 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1739 | ir_raw_load_modules(&rc_proto); | |
1740 | ||
41380868 | 1741 | if (dev->change_protocol) { |
6d741bfe | 1742 | rc = dev->change_protocol(dev, &rc_proto); |
7ff2c2bc AS |
1743 | if (rc < 0) |
1744 | goto out_table; | |
6d741bfe | 1745 | dev->enabled_protocols = rc_proto; |
7ff2c2bc AS |
1746 | } |
1747 | ||
d8b4b582 DH |
1748 | set_bit(EV_KEY, dev->input_dev->evbit); |
1749 | set_bit(EV_REP, dev->input_dev->evbit); | |
1750 | set_bit(EV_MSC, dev->input_dev->evbit); | |
1751 | set_bit(MSC_SCAN, dev->input_dev->mscbit); | |
1752 | if (dev->open) | |
1753 | dev->input_dev->open = ir_open; | |
1754 | if (dev->close) | |
1755 | dev->input_dev->close = ir_close; | |
1756 | ||
b2aceb73 DH |
1757 | dev->input_dev->dev.parent = &dev->dev; |
1758 | memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id)); | |
1759 | dev->input_dev->phys = dev->input_phys; | |
518f4b26 | 1760 | dev->input_dev->name = dev->device_name; |
b2aceb73 | 1761 | |
f56928ab DH |
1762 | return 0; |
1763 | ||
1764 | out_table: | |
1765 | ir_free_table(&dev->rc_map); | |
1766 | ||
1767 | return rc; | |
1768 | } | |
1769 | ||
1770 | static int rc_setup_rx_device(struct rc_dev *dev) | |
1771 | { | |
1772 | int rc; | |
1773 | ||
b2aceb73 DH |
1774 | /* rc_open will be called here */ |
1775 | rc = input_register_device(dev->input_dev); | |
1776 | if (rc) | |
f56928ab | 1777 | return rc; |
b2aceb73 | 1778 | |
7ff2c2bc AS |
1779 | /* |
1780 | * Default delay of 250ms is too short for some protocols, especially | |
1781 | * since the timeout is currently set to 250ms. Increase it to 500ms, | |
1782 | * to avoid wrong repetition of the keycodes. Note that this must be | |
1783 | * set after the call to input_register_device(). | |
1784 | */ | |
57c642cb SY |
1785 | if (dev->allowed_protocols == RC_PROTO_BIT_CEC) |
1786 | dev->input_dev->rep[REP_DELAY] = 0; | |
1787 | else | |
1788 | dev->input_dev->rep[REP_DELAY] = 500; | |
7ff2c2bc AS |
1789 | |
1790 | /* | |
1791 | * As a repeat event on protocols like RC-5 and NEC take as long as | |
1792 | * 110/114ms, using 33ms as a repeat period is not the right thing | |
1793 | * to do. | |
1794 | */ | |
1795 | dev->input_dev->rep[REP_PERIOD] = 125; | |
1796 | ||
7ff2c2bc | 1797 | return 0; |
7ff2c2bc AS |
1798 | } |
1799 | ||
1800 | static void rc_free_rx_device(struct rc_dev *dev) | |
1801 | { | |
f56928ab | 1802 | if (!dev) |
7ff2c2bc AS |
1803 | return; |
1804 | ||
f56928ab DH |
1805 | if (dev->input_dev) { |
1806 | input_unregister_device(dev->input_dev); | |
1807 | dev->input_dev = NULL; | |
1808 | } | |
7ff2c2bc | 1809 | |
f56928ab | 1810 | ir_free_table(&dev->rc_map); |
7ff2c2bc AS |
1811 | } |
1812 | ||
1813 | int rc_register_device(struct rc_dev *dev) | |
1814 | { | |
7ff2c2bc AS |
1815 | const char *path; |
1816 | int attr = 0; | |
1817 | int minor; | |
1818 | int rc; | |
1819 | ||
1820 | if (!dev) | |
1821 | return -EINVAL; | |
1822 | ||
fcb13097 DH |
1823 | minor = ida_simple_get(&rc_ida, 0, RC_DEV_MAX, GFP_KERNEL); |
1824 | if (minor < 0) | |
1825 | return minor; | |
1826 | ||
1827 | dev->minor = minor; | |
1828 | dev_set_name(&dev->dev, "rc%u", dev->minor); | |
1829 | dev_set_drvdata(&dev->dev, dev); | |
587d1b06 | 1830 | |
99b0f3c9 | 1831 | dev->dev.groups = dev->sysfs_groups; |
6d75db30 SY |
1832 | if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol) |
1833 | dev->sysfs_groups[attr++] = &rc_dev_ro_protocol_attr_grp; | |
1834 | else if (dev->driver_type != RC_DRIVER_IR_RAW_TX) | |
1835 | dev->sysfs_groups[attr++] = &rc_dev_rw_protocol_attr_grp; | |
99b0f3c9 | 1836 | if (dev->s_filter) |
120703f9 | 1837 | dev->sysfs_groups[attr++] = &rc_dev_filter_attr_grp; |
99b0f3c9 DH |
1838 | if (dev->s_wakeup_filter) |
1839 | dev->sysfs_groups[attr++] = &rc_dev_wakeup_filter_attr_grp; | |
99b0f3c9 DH |
1840 | dev->sysfs_groups[attr++] = NULL; |
1841 | ||
a60d64b1 | 1842 | if (dev->driver_type == RC_DRIVER_IR_RAW) { |
f56928ab DH |
1843 | rc = ir_raw_event_prepare(dev); |
1844 | if (rc < 0) | |
1845 | goto out_minor; | |
1846 | } | |
1847 | ||
1848 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { | |
1849 | rc = rc_prepare_rx_device(dev); | |
1850 | if (rc) | |
1851 | goto out_raw; | |
1852 | } | |
1853 | ||
d8b4b582 DH |
1854 | rc = device_add(&dev->dev); |
1855 | if (rc) | |
f56928ab | 1856 | goto out_rx_free; |
bc2a6c57 | 1857 | |
d8b4b582 | 1858 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
4dc0e908 | 1859 | dev_info(&dev->dev, "%s as %s\n", |
518f4b26 | 1860 | dev->device_name ?: "Unspecified device", path ?: "N/A"); |
bc2a6c57 MCC |
1861 | kfree(path); |
1862 | ||
f56928ab DH |
1863 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { |
1864 | rc = rc_setup_rx_device(dev); | |
1865 | if (rc) | |
1866 | goto out_dev; | |
1867 | } | |
1868 | ||
a60d64b1 | 1869 | /* Ensure that the lirc kfifo is setup before we start the thread */ |
62d6f199 | 1870 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) { |
a60d64b1 | 1871 | rc = ir_lirc_register(dev); |
d8b4b582 | 1872 | if (rc < 0) |
f56928ab | 1873 | goto out_rx; |
d8b4b582 DH |
1874 | } |
1875 | ||
a60d64b1 SY |
1876 | if (dev->driver_type == RC_DRIVER_IR_RAW) { |
1877 | rc = ir_raw_event_register(dev); | |
1878 | if (rc < 0) | |
1879 | goto out_lirc; | |
1880 | } | |
1881 | ||
7790e81f SY |
1882 | dev->registered = true; |
1883 | ||
1f17f684 SY |
1884 | dev_dbg(&dev->dev, "Registered rc%u (driver: %s)\n", dev->minor, |
1885 | dev->driver_name ? dev->driver_name : "unknown"); | |
d8b4b582 | 1886 | |
bc2a6c57 | 1887 | return 0; |
d8b4b582 | 1888 | |
a60d64b1 | 1889 | out_lirc: |
62d6f199 | 1890 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
a60d64b1 | 1891 | ir_lirc_unregister(dev); |
f56928ab DH |
1892 | out_rx: |
1893 | rc_free_rx_device(dev); | |
d8b4b582 DH |
1894 | out_dev: |
1895 | device_del(&dev->dev); | |
f56928ab DH |
1896 | out_rx_free: |
1897 | ir_free_table(&dev->rc_map); | |
1898 | out_raw: | |
1899 | ir_raw_event_free(dev); | |
1900 | out_minor: | |
fcb13097 | 1901 | ida_simple_remove(&rc_ida, minor); |
d8b4b582 | 1902 | return rc; |
bc2a6c57 | 1903 | } |
d8b4b582 | 1904 | EXPORT_SYMBOL_GPL(rc_register_device); |
bc2a6c57 | 1905 | |
ddbf7d5a HK |
1906 | static void devm_rc_release(struct device *dev, void *res) |
1907 | { | |
1908 | rc_unregister_device(*(struct rc_dev **)res); | |
1909 | } | |
1910 | ||
1911 | int devm_rc_register_device(struct device *parent, struct rc_dev *dev) | |
1912 | { | |
1913 | struct rc_dev **dr; | |
1914 | int ret; | |
1915 | ||
1916 | dr = devres_alloc(devm_rc_release, sizeof(*dr), GFP_KERNEL); | |
1917 | if (!dr) | |
1918 | return -ENOMEM; | |
1919 | ||
1920 | ret = rc_register_device(dev); | |
1921 | if (ret) { | |
1922 | devres_free(dr); | |
1923 | return ret; | |
1924 | } | |
1925 | ||
1926 | *dr = dev; | |
1927 | devres_add(parent, dr); | |
1928 | ||
1929 | return 0; | |
1930 | } | |
1931 | EXPORT_SYMBOL_GPL(devm_rc_register_device); | |
1932 | ||
d8b4b582 | 1933 | void rc_unregister_device(struct rc_dev *dev) |
bc2a6c57 | 1934 | { |
d8b4b582 DH |
1935 | if (!dev) |
1936 | return; | |
bc2a6c57 | 1937 | |
d8b4b582 DH |
1938 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1939 | ir_raw_event_unregister(dev); | |
1940 | ||
8d406881 SY |
1941 | del_timer_sync(&dev->timer_keyup); |
1942 | del_timer_sync(&dev->timer_repeat); | |
1943 | ||
7ff2c2bc | 1944 | rc_free_rx_device(dev); |
d8b4b582 | 1945 | |
7790e81f SY |
1946 | mutex_lock(&dev->lock); |
1947 | dev->registered = false; | |
1948 | mutex_unlock(&dev->lock); | |
1949 | ||
1950 | /* | |
1951 | * lirc device should be freed with dev->registered = false, so | |
1952 | * that userspace polling will get notified. | |
1953 | */ | |
62d6f199 | 1954 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
a60d64b1 SY |
1955 | ir_lirc_unregister(dev); |
1956 | ||
b05681b9 | 1957 | device_del(&dev->dev); |
d8b4b582 | 1958 | |
fcb13097 DH |
1959 | ida_simple_remove(&rc_ida, dev->minor); |
1960 | ||
ddbf7d5a HK |
1961 | if (!dev->managed_alloc) |
1962 | rc_free_device(dev); | |
bc2a6c57 | 1963 | } |
b05681b9 | 1964 | |
d8b4b582 | 1965 | EXPORT_SYMBOL_GPL(rc_unregister_device); |
bc2a6c57 MCC |
1966 | |
1967 | /* | |
1968 | * Init/exit code for the module. Basically, creates/removes /sys/class/rc | |
1969 | */ | |
1970 | ||
6bda9644 | 1971 | static int __init rc_core_init(void) |
bc2a6c57 | 1972 | { |
40fc5325 | 1973 | int rc = class_register(&rc_class); |
bc2a6c57 | 1974 | if (rc) { |
d3d96820 | 1975 | pr_err("rc_core: unable to register rc class\n"); |
bc2a6c57 MCC |
1976 | return rc; |
1977 | } | |
1978 | ||
a60d64b1 SY |
1979 | rc = lirc_dev_init(); |
1980 | if (rc) { | |
1981 | pr_err("rc_core: unable to init lirc\n"); | |
1982 | class_unregister(&rc_class); | |
1983 | return 0; | |
1984 | } | |
1985 | ||
153a60bb | 1986 | led_trigger_register_simple("rc-feedback", &led_feedback); |
d100e659 | 1987 | rc_map_register(&empty_map); |
bc2a6c57 MCC |
1988 | |
1989 | return 0; | |
1990 | } | |
1991 | ||
6bda9644 | 1992 | static void __exit rc_core_exit(void) |
bc2a6c57 | 1993 | { |
a60d64b1 | 1994 | lirc_dev_exit(); |
40fc5325 | 1995 | class_unregister(&rc_class); |
153a60bb | 1996 | led_trigger_unregister_simple(led_feedback); |
d100e659 | 1997 | rc_map_unregister(&empty_map); |
bc2a6c57 MCC |
1998 | } |
1999 | ||
e76d4ce4 | 2000 | subsys_initcall(rc_core_init); |
6bda9644 | 2001 | module_exit(rc_core_exit); |
bc2a6c57 | 2002 | |
37e59f87 | 2003 | MODULE_AUTHOR("Mauro Carvalho Chehab"); |
20835280 | 2004 | MODULE_LICENSE("GPL v2"); |