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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[] = { | |
28492256 SY |
29 | [RC_PROTO_UNKNOWN] = { .name = "unknown", .repeat_period = 125 }, |
30 | [RC_PROTO_OTHER] = { .name = "other", .repeat_period = 125 }, | |
6d741bfe | 31 | [RC_PROTO_RC5] = { .name = "rc-5", |
28492256 | 32 | .scancode_bits = 0x1f7f, .repeat_period = 114 }, |
6d741bfe | 33 | [RC_PROTO_RC5X_20] = { .name = "rc-5x-20", |
28492256 | 34 | .scancode_bits = 0x1f7f3f, .repeat_period = 114 }, |
6d741bfe | 35 | [RC_PROTO_RC5_SZ] = { .name = "rc-5-sz", |
28492256 | 36 | .scancode_bits = 0x2fff, .repeat_period = 114 }, |
6d741bfe | 37 | [RC_PROTO_JVC] = { .name = "jvc", |
28492256 | 38 | .scancode_bits = 0xffff, .repeat_period = 125 }, |
6d741bfe | 39 | [RC_PROTO_SONY12] = { .name = "sony-12", |
28492256 | 40 | .scancode_bits = 0x1f007f, .repeat_period = 100 }, |
6d741bfe | 41 | [RC_PROTO_SONY15] = { .name = "sony-15", |
28492256 | 42 | .scancode_bits = 0xff007f, .repeat_period = 100 }, |
6d741bfe | 43 | [RC_PROTO_SONY20] = { .name = "sony-20", |
28492256 | 44 | .scancode_bits = 0x1fff7f, .repeat_period = 100 }, |
6d741bfe | 45 | [RC_PROTO_NEC] = { .name = "nec", |
28492256 | 46 | .scancode_bits = 0xffff, .repeat_period = 110 }, |
6d741bfe | 47 | [RC_PROTO_NECX] = { .name = "nec-x", |
28492256 | 48 | .scancode_bits = 0xffffff, .repeat_period = 110 }, |
6d741bfe | 49 | [RC_PROTO_NEC32] = { .name = "nec-32", |
28492256 | 50 | .scancode_bits = 0xffffffff, .repeat_period = 110 }, |
6d741bfe | 51 | [RC_PROTO_SANYO] = { .name = "sanyo", |
28492256 | 52 | .scancode_bits = 0x1fffff, .repeat_period = 125 }, |
6d741bfe | 53 | [RC_PROTO_MCIR2_KBD] = { .name = "mcir2-kbd", |
53932760 | 54 | .scancode_bits = 0xffffff, .repeat_period = 100 }, |
6d741bfe | 55 | [RC_PROTO_MCIR2_MSE] = { .name = "mcir2-mse", |
28492256 | 56 | .scancode_bits = 0x1fffff, .repeat_period = 100 }, |
6d741bfe | 57 | [RC_PROTO_RC6_0] = { .name = "rc-6-0", |
28492256 | 58 | .scancode_bits = 0xffff, .repeat_period = 114 }, |
6d741bfe | 59 | [RC_PROTO_RC6_6A_20] = { .name = "rc-6-6a-20", |
28492256 | 60 | .scancode_bits = 0xfffff, .repeat_period = 114 }, |
6d741bfe | 61 | [RC_PROTO_RC6_6A_24] = { .name = "rc-6-6a-24", |
28492256 | 62 | .scancode_bits = 0xffffff, .repeat_period = 114 }, |
6d741bfe | 63 | [RC_PROTO_RC6_6A_32] = { .name = "rc-6-6a-32", |
28492256 | 64 | .scancode_bits = 0xffffffff, .repeat_period = 114 }, |
6d741bfe | 65 | [RC_PROTO_RC6_MCE] = { .name = "rc-6-mce", |
28492256 | 66 | .scancode_bits = 0xffff7fff, .repeat_period = 114 }, |
6d741bfe | 67 | [RC_PROTO_SHARP] = { .name = "sharp", |
28492256 SY |
68 | .scancode_bits = 0x1fff, .repeat_period = 125 }, |
69 | [RC_PROTO_XMP] = { .name = "xmp", .repeat_period = 125 }, | |
70 | [RC_PROTO_CEC] = { .name = "cec", .repeat_period = 0 }, | |
447dcc0c | 71 | [RC_PROTO_IMON] = { .name = "imon", |
28492256 | 72 | .scancode_bits = 0x7fffffff, .repeat_period = 114 }, |
721074b0 PL |
73 | [RC_PROTO_RCMM12] = { .name = "rc-mm-12", |
74 | .scancode_bits = 0x00000fff, .repeat_period = 114 }, | |
75 | [RC_PROTO_RCMM24] = { .name = "rc-mm-24", | |
76 | .scancode_bits = 0x00ffffff, .repeat_period = 114 }, | |
77 | [RC_PROTO_RCMM32] = { .name = "rc-mm-32", | |
78 | .scancode_bits = 0xffffffff, .repeat_period = 114 }, | |
17287692 | 79 | [RC_PROTO_XBOX_DVD] = { .name = "xbox-dvd", .repeat_period = 64 }, |
d57ea877 | 80 | }; |
a374fef4 | 81 | |
4c7b355d | 82 | /* Used to keep track of known keymaps */ |
631493ec MCC |
83 | static LIST_HEAD(rc_map_list); |
84 | static DEFINE_SPINLOCK(rc_map_lock); | |
153a60bb | 85 | static struct led_trigger *led_feedback; |
631493ec | 86 | |
fcb13097 DH |
87 | /* Used to keep track of rc devices */ |
88 | static DEFINE_IDA(rc_ida); | |
89 | ||
d100e659 | 90 | static struct rc_map_list *seek_rc_map(const char *name) |
631493ec | 91 | { |
d100e659 | 92 | struct rc_map_list *map = NULL; |
631493ec MCC |
93 | |
94 | spin_lock(&rc_map_lock); | |
95 | list_for_each_entry(map, &rc_map_list, list) { | |
96 | if (!strcmp(name, map->map.name)) { | |
97 | spin_unlock(&rc_map_lock); | |
98 | return map; | |
99 | } | |
100 | } | |
101 | spin_unlock(&rc_map_lock); | |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
d100e659 | 106 | struct rc_map *rc_map_get(const char *name) |
631493ec MCC |
107 | { |
108 | ||
d100e659 | 109 | struct rc_map_list *map; |
631493ec MCC |
110 | |
111 | map = seek_rc_map(name); | |
2ff56fad | 112 | #ifdef CONFIG_MODULES |
631493ec | 113 | if (!map) { |
8ea5488a | 114 | int rc = request_module("%s", name); |
631493ec | 115 | if (rc < 0) { |
d3d96820 | 116 | pr_err("Couldn't load IR keymap %s\n", name); |
631493ec MCC |
117 | return NULL; |
118 | } | |
119 | msleep(20); /* Give some time for IR to register */ | |
120 | ||
121 | map = seek_rc_map(name); | |
122 | } | |
123 | #endif | |
124 | if (!map) { | |
d3d96820 | 125 | pr_err("IR keymap %s not found\n", name); |
631493ec MCC |
126 | return NULL; |
127 | } | |
128 | ||
129 | printk(KERN_INFO "Registered IR keymap %s\n", map->map.name); | |
130 | ||
131 | return &map->map; | |
132 | } | |
d100e659 | 133 | EXPORT_SYMBOL_GPL(rc_map_get); |
631493ec | 134 | |
d100e659 | 135 | int rc_map_register(struct rc_map_list *map) |
631493ec MCC |
136 | { |
137 | spin_lock(&rc_map_lock); | |
138 | list_add_tail(&map->list, &rc_map_list); | |
139 | spin_unlock(&rc_map_lock); | |
140 | return 0; | |
141 | } | |
d100e659 | 142 | EXPORT_SYMBOL_GPL(rc_map_register); |
631493ec | 143 | |
d100e659 | 144 | void rc_map_unregister(struct rc_map_list *map) |
631493ec MCC |
145 | { |
146 | spin_lock(&rc_map_lock); | |
147 | list_del(&map->list); | |
148 | spin_unlock(&rc_map_lock); | |
149 | } | |
d100e659 | 150 | EXPORT_SYMBOL_GPL(rc_map_unregister); |
631493ec MCC |
151 | |
152 | ||
2f4f58d6 | 153 | static struct rc_map_table empty[] = { |
631493ec MCC |
154 | { 0x2a, KEY_COFFEE }, |
155 | }; | |
156 | ||
d100e659 | 157 | static struct rc_map_list empty_map = { |
631493ec | 158 | .map = { |
6d741bfe SY |
159 | .scan = empty, |
160 | .size = ARRAY_SIZE(empty), | |
161 | .rc_proto = RC_PROTO_UNKNOWN, /* Legacy IR type */ | |
162 | .name = RC_MAP_EMPTY, | |
631493ec MCC |
163 | } |
164 | }; | |
165 | ||
e6c6d7d4 SY |
166 | /** |
167 | * scancode_to_u64() - converts scancode in &struct input_keymap_entry | |
168 | * @ke: keymap entry containing scancode to be converted. | |
169 | * @scancode: pointer to the location where converted scancode should | |
170 | * be stored. | |
171 | * | |
172 | * This function is a version of input_scancode_to_scalar specialized for | |
173 | * rc-core. | |
174 | */ | |
175 | static int scancode_to_u64(const struct input_keymap_entry *ke, u64 *scancode) | |
176 | { | |
177 | switch (ke->len) { | |
178 | case 1: | |
179 | *scancode = *((u8 *)ke->scancode); | |
180 | break; | |
181 | ||
182 | case 2: | |
183 | *scancode = *((u16 *)ke->scancode); | |
184 | break; | |
185 | ||
186 | case 4: | |
187 | *scancode = *((u32 *)ke->scancode); | |
188 | break; | |
189 | ||
190 | case 8: | |
191 | *scancode = *((u64 *)ke->scancode); | |
192 | break; | |
193 | ||
194 | default: | |
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
9f470095 DT |
201 | /** |
202 | * ir_create_table() - initializes a scancode table | |
1f17f684 | 203 | * @dev: the rc_dev device |
b088ba65 | 204 | * @rc_map: the rc_map to initialize |
9f470095 | 205 | * @name: name to assign to the table |
6d741bfe | 206 | * @rc_proto: ir type to assign to the new table |
9f470095 | 207 | * @size: initial size of the table |
9f470095 | 208 | * |
b088ba65 | 209 | * This routine will initialize the rc_map and will allocate |
d8b4b582 | 210 | * memory to hold at least the specified number of elements. |
f67f366c MCC |
211 | * |
212 | * return: zero on success or a negative error code | |
9f470095 | 213 | */ |
1f17f684 | 214 | static int ir_create_table(struct rc_dev *dev, struct rc_map *rc_map, |
6d741bfe | 215 | const char *name, u64 rc_proto, size_t size) |
9f470095 | 216 | { |
d54fc3bb HV |
217 | rc_map->name = kstrdup(name, GFP_KERNEL); |
218 | if (!rc_map->name) | |
219 | return -ENOMEM; | |
6d741bfe | 220 | rc_map->rc_proto = rc_proto; |
2f4f58d6 MCC |
221 | rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table)); |
222 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); | |
b088ba65 | 223 | rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL); |
d54fc3bb HV |
224 | if (!rc_map->scan) { |
225 | kfree(rc_map->name); | |
226 | rc_map->name = NULL; | |
9f470095 | 227 | return -ENOMEM; |
d54fc3bb | 228 | } |
9f470095 | 229 | |
1f17f684 SY |
230 | dev_dbg(&dev->dev, "Allocated space for %u keycode entries (%u bytes)\n", |
231 | rc_map->size, rc_map->alloc); | |
9f470095 DT |
232 | return 0; |
233 | } | |
234 | ||
235 | /** | |
236 | * ir_free_table() - frees memory allocated by a scancode table | |
b088ba65 | 237 | * @rc_map: the table whose mappings need to be freed |
9f470095 DT |
238 | * |
239 | * This routine will free memory alloctaed for key mappings used by given | |
240 | * scancode table. | |
241 | */ | |
b088ba65 | 242 | static void ir_free_table(struct rc_map *rc_map) |
9f470095 | 243 | { |
b088ba65 | 244 | rc_map->size = 0; |
d54fc3bb | 245 | kfree(rc_map->name); |
c183d358 | 246 | rc_map->name = NULL; |
b088ba65 MCC |
247 | kfree(rc_map->scan); |
248 | rc_map->scan = NULL; | |
9f470095 DT |
249 | } |
250 | ||
7fee03e4 | 251 | /** |
b3074c0a | 252 | * ir_resize_table() - resizes a scancode table if necessary |
1f17f684 | 253 | * @dev: the rc_dev device |
b088ba65 | 254 | * @rc_map: the rc_map to resize |
9f470095 | 255 | * @gfp_flags: gfp flags to use when allocating memory |
7fee03e4 | 256 | * |
b088ba65 | 257 | * This routine will shrink the rc_map if it has lots of |
b3074c0a | 258 | * unused entries and grow it if it is full. |
f67f366c MCC |
259 | * |
260 | * return: zero on success or a negative error code | |
7fee03e4 | 261 | */ |
1f17f684 SY |
262 | static int ir_resize_table(struct rc_dev *dev, struct rc_map *rc_map, |
263 | gfp_t gfp_flags) | |
7fee03e4 | 264 | { |
b088ba65 | 265 | unsigned int oldalloc = rc_map->alloc; |
b3074c0a | 266 | unsigned int newalloc = oldalloc; |
2f4f58d6 MCC |
267 | struct rc_map_table *oldscan = rc_map->scan; |
268 | struct rc_map_table *newscan; | |
b3074c0a | 269 | |
b088ba65 | 270 | if (rc_map->size == rc_map->len) { |
b3074c0a | 271 | /* All entries in use -> grow keytable */ |
b088ba65 | 272 | if (rc_map->alloc >= IR_TAB_MAX_SIZE) |
b3074c0a | 273 | return -ENOMEM; |
7fee03e4 | 274 | |
b3074c0a | 275 | newalloc *= 2; |
1f17f684 | 276 | dev_dbg(&dev->dev, "Growing table to %u bytes\n", newalloc); |
b3074c0a | 277 | } |
7fee03e4 | 278 | |
b088ba65 | 279 | if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) { |
b3074c0a DH |
280 | /* Less than 1/3 of entries in use -> shrink keytable */ |
281 | newalloc /= 2; | |
1f17f684 | 282 | dev_dbg(&dev->dev, "Shrinking table to %u bytes\n", newalloc); |
b3074c0a | 283 | } |
7fee03e4 | 284 | |
b3074c0a DH |
285 | if (newalloc == oldalloc) |
286 | return 0; | |
7fee03e4 | 287 | |
9f470095 | 288 | newscan = kmalloc(newalloc, gfp_flags); |
1f17f684 | 289 | if (!newscan) |
b3074c0a | 290 | return -ENOMEM; |
7fee03e4 | 291 | |
2f4f58d6 | 292 | memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table)); |
b088ba65 MCC |
293 | rc_map->scan = newscan; |
294 | rc_map->alloc = newalloc; | |
2f4f58d6 | 295 | rc_map->size = rc_map->alloc / sizeof(struct rc_map_table); |
b3074c0a DH |
296 | kfree(oldscan); |
297 | return 0; | |
7fee03e4 MCC |
298 | } |
299 | ||
f6fc5049 | 300 | /** |
9f470095 | 301 | * ir_update_mapping() - set a keycode in the scancode->keycode table |
d8b4b582 | 302 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 303 | * @rc_map: scancode table to be adjusted |
9f470095 | 304 | * @index: index of the mapping that needs to be updated |
f67f366c | 305 | * @new_keycode: the desired keycode |
9f470095 | 306 | * |
d8b4b582 | 307 | * This routine is used to update scancode->keycode mapping at given |
9f470095 | 308 | * position. |
f67f366c MCC |
309 | * |
310 | * return: previous keycode assigned to the mapping | |
311 | * | |
9f470095 | 312 | */ |
d8b4b582 | 313 | static unsigned int ir_update_mapping(struct rc_dev *dev, |
b088ba65 | 314 | struct rc_map *rc_map, |
9f470095 DT |
315 | unsigned int index, |
316 | unsigned int new_keycode) | |
317 | { | |
b088ba65 | 318 | int old_keycode = rc_map->scan[index].keycode; |
05f0edad | 319 | int i; |
9f470095 DT |
320 | |
321 | /* Did the user wish to remove the mapping? */ | |
322 | if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) { | |
e6c6d7d4 | 323 | dev_dbg(&dev->dev, "#%d: Deleting scan 0x%04llx\n", |
1f17f684 | 324 | index, rc_map->scan[index].scancode); |
b088ba65 MCC |
325 | rc_map->len--; |
326 | memmove(&rc_map->scan[index], &rc_map->scan[index+ 1], | |
2f4f58d6 | 327 | (rc_map->len - index) * sizeof(struct rc_map_table)); |
9f470095 | 328 | } else { |
e6c6d7d4 | 329 | dev_dbg(&dev->dev, "#%d: %s scan 0x%04llx with key 0x%04x\n", |
1f17f684 SY |
330 | index, |
331 | old_keycode == KEY_RESERVED ? "New" : "Replacing", | |
332 | rc_map->scan[index].scancode, new_keycode); | |
b088ba65 | 333 | rc_map->scan[index].keycode = new_keycode; |
05f0edad | 334 | __set_bit(new_keycode, dev->input_dev->keybit); |
9f470095 DT |
335 | } |
336 | ||
337 | if (old_keycode != KEY_RESERVED) { | |
05f0edad SY |
338 | /* A previous mapping was updated... */ |
339 | __clear_bit(old_keycode, dev->input_dev->keybit); | |
340 | /* ... but another scancode might use the same keycode */ | |
341 | for (i = 0; i < rc_map->len; i++) { | |
342 | if (rc_map->scan[i].keycode == old_keycode) { | |
343 | __set_bit(old_keycode, dev->input_dev->keybit); | |
344 | break; | |
345 | } | |
346 | } | |
347 | ||
9f470095 | 348 | /* Possibly shrink the keytable, failure is not a problem */ |
1f17f684 | 349 | ir_resize_table(dev, rc_map, GFP_ATOMIC); |
9f470095 DT |
350 | } |
351 | ||
352 | return old_keycode; | |
353 | } | |
354 | ||
355 | /** | |
4c7b355d | 356 | * ir_establish_scancode() - set a keycode in the scancode->keycode table |
d8b4b582 | 357 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 358 | * @rc_map: scancode table to be searched |
9f470095 DT |
359 | * @scancode: the desired scancode |
360 | * @resize: controls whether we allowed to resize the table to | |
25985edc | 361 | * accommodate not yet present scancodes |
f6fc5049 | 362 | * |
b088ba65 | 363 | * This routine is used to locate given scancode in rc_map. |
9f470095 DT |
364 | * If scancode is not yet present the routine will allocate a new slot |
365 | * for it. | |
f67f366c MCC |
366 | * |
367 | * return: index of the mapping containing scancode in question | |
368 | * or -1U in case of failure. | |
f6fc5049 | 369 | */ |
d8b4b582 | 370 | static unsigned int ir_establish_scancode(struct rc_dev *dev, |
b088ba65 | 371 | struct rc_map *rc_map, |
e6c6d7d4 | 372 | u64 scancode, bool resize) |
f6fc5049 | 373 | { |
b3074c0a | 374 | unsigned int i; |
9dfe4e83 MCC |
375 | |
376 | /* | |
377 | * Unfortunately, some hardware-based IR decoders don't provide | |
378 | * all bits for the complete IR code. In general, they provide only | |
379 | * the command part of the IR code. Yet, as it is possible to replace | |
380 | * the provided IR with another one, it is needed to allow loading | |
d8b4b582 DH |
381 | * IR tables from other remotes. So, we support specifying a mask to |
382 | * indicate the valid bits of the scancodes. | |
9dfe4e83 | 383 | */ |
9d2f1d3c DH |
384 | if (dev->scancode_mask) |
385 | scancode &= dev->scancode_mask; | |
b3074c0a DH |
386 | |
387 | /* First check if we already have a mapping for this ir command */ | |
b088ba65 MCC |
388 | for (i = 0; i < rc_map->len; i++) { |
389 | if (rc_map->scan[i].scancode == scancode) | |
9f470095 DT |
390 | return i; |
391 | ||
b3074c0a | 392 | /* Keytable is sorted from lowest to highest scancode */ |
b088ba65 | 393 | if (rc_map->scan[i].scancode >= scancode) |
b3074c0a | 394 | break; |
b3074c0a | 395 | } |
f6fc5049 | 396 | |
9f470095 | 397 | /* No previous mapping found, we might need to grow the table */ |
b088ba65 | 398 | if (rc_map->size == rc_map->len) { |
1f17f684 | 399 | if (!resize || ir_resize_table(dev, rc_map, GFP_ATOMIC)) |
9f470095 DT |
400 | return -1U; |
401 | } | |
35438946 | 402 | |
9f470095 | 403 | /* i is the proper index to insert our new keycode */ |
b088ba65 MCC |
404 | if (i < rc_map->len) |
405 | memmove(&rc_map->scan[i + 1], &rc_map->scan[i], | |
2f4f58d6 | 406 | (rc_map->len - i) * sizeof(struct rc_map_table)); |
b088ba65 MCC |
407 | rc_map->scan[i].scancode = scancode; |
408 | rc_map->scan[i].keycode = KEY_RESERVED; | |
409 | rc_map->len++; | |
f6fc5049 | 410 | |
9f470095 | 411 | return i; |
f6fc5049 MCC |
412 | } |
413 | ||
ef53a115 | 414 | /** |
b3074c0a | 415 | * ir_setkeycode() - set a keycode in the scancode->keycode table |
d8b4b582 | 416 | * @idev: the struct input_dev device descriptor |
f67f366c MCC |
417 | * @ke: Input keymap entry |
418 | * @old_keycode: result | |
ef53a115 | 419 | * |
b3074c0a | 420 | * This routine is used to handle evdev EVIOCSKEY ioctl. |
f67f366c MCC |
421 | * |
422 | * return: -EINVAL if the keycode could not be inserted, otherwise zero. | |
ef53a115 | 423 | */ |
d8b4b582 | 424 | static int ir_setkeycode(struct input_dev *idev, |
9f470095 DT |
425 | const struct input_keymap_entry *ke, |
426 | unsigned int *old_keycode) | |
ef53a115 | 427 | { |
d8b4b582 | 428 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 429 | struct rc_map *rc_map = &rdev->rc_map; |
9f470095 | 430 | unsigned int index; |
e6c6d7d4 | 431 | u64 scancode; |
dea8a39f | 432 | int retval = 0; |
9f470095 | 433 | unsigned long flags; |
ef53a115 | 434 | |
b088ba65 | 435 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
436 | |
437 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
438 | index = ke->index; | |
b088ba65 | 439 | if (index >= rc_map->len) { |
9f470095 DT |
440 | retval = -EINVAL; |
441 | goto out; | |
442 | } | |
443 | } else { | |
e6c6d7d4 | 444 | retval = scancode_to_u64(ke, &scancode); |
9f470095 DT |
445 | if (retval) |
446 | goto out; | |
447 | ||
b088ba65 MCC |
448 | index = ir_establish_scancode(rdev, rc_map, scancode, true); |
449 | if (index >= rc_map->len) { | |
9f470095 DT |
450 | retval = -ENOMEM; |
451 | goto out; | |
452 | } | |
453 | } | |
454 | ||
b088ba65 | 455 | *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode); |
9f470095 DT |
456 | |
457 | out: | |
b088ba65 | 458 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 459 | return retval; |
e97f4677 MCC |
460 | } |
461 | ||
462 | /** | |
b3074c0a | 463 | * ir_setkeytable() - sets several entries in the scancode->keycode table |
d8b4b582 | 464 | * @dev: the struct rc_dev device descriptor |
b088ba65 | 465 | * @from: the struct rc_map to copy entries from |
e97f4677 | 466 | * |
b3074c0a | 467 | * This routine is used to handle table initialization. |
f67f366c MCC |
468 | * |
469 | * return: -ENOMEM if all keycodes could not be inserted, otherwise zero. | |
e97f4677 | 470 | */ |
e6c6d7d4 | 471 | static int ir_setkeytable(struct rc_dev *dev, const struct rc_map *from) |
e97f4677 | 472 | { |
b088ba65 | 473 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
474 | unsigned int i, index; |
475 | int rc; | |
476 | ||
1f17f684 SY |
477 | rc = ir_create_table(dev, rc_map, from->name, from->rc_proto, |
478 | from->size); | |
9f470095 DT |
479 | if (rc) |
480 | return rc; | |
481 | ||
b3074c0a | 482 | for (i = 0; i < from->size; i++) { |
b088ba65 | 483 | index = ir_establish_scancode(dev, rc_map, |
9f470095 | 484 | from->scan[i].scancode, false); |
b088ba65 | 485 | if (index >= rc_map->len) { |
9f470095 | 486 | rc = -ENOMEM; |
b3074c0a | 487 | break; |
9f470095 DT |
488 | } |
489 | ||
b088ba65 | 490 | ir_update_mapping(dev, rc_map, index, |
9f470095 | 491 | from->scan[i].keycode); |
e97f4677 | 492 | } |
9f470095 DT |
493 | |
494 | if (rc) | |
b088ba65 | 495 | ir_free_table(rc_map); |
9f470095 | 496 | |
b3074c0a | 497 | return rc; |
ef53a115 MCC |
498 | } |
499 | ||
8ca01d4f TM |
500 | static int rc_map_cmp(const void *key, const void *elt) |
501 | { | |
e6c6d7d4 | 502 | const u64 *scancode = key; |
8ca01d4f TM |
503 | const struct rc_map_table *e = elt; |
504 | ||
505 | if (*scancode < e->scancode) | |
506 | return -1; | |
507 | else if (*scancode > e->scancode) | |
508 | return 1; | |
509 | return 0; | |
510 | } | |
511 | ||
9f470095 DT |
512 | /** |
513 | * ir_lookup_by_scancode() - locate mapping by scancode | |
b088ba65 | 514 | * @rc_map: the struct rc_map to search |
9f470095 | 515 | * @scancode: scancode to look for in the table |
9f470095 DT |
516 | * |
517 | * This routine performs binary search in RC keykeymap table for | |
518 | * given scancode. | |
f67f366c MCC |
519 | * |
520 | * return: index in the table, -1U if not found | |
9f470095 | 521 | */ |
b088ba65 | 522 | static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map, |
e6c6d7d4 | 523 | u64 scancode) |
9f470095 | 524 | { |
8ca01d4f TM |
525 | struct rc_map_table *res; |
526 | ||
527 | res = bsearch(&scancode, rc_map->scan, rc_map->len, | |
528 | sizeof(struct rc_map_table), rc_map_cmp); | |
529 | if (!res) | |
530 | return -1U; | |
531 | else | |
532 | return res - rc_map->scan; | |
9f470095 DT |
533 | } |
534 | ||
ef53a115 | 535 | /** |
b3074c0a | 536 | * ir_getkeycode() - get a keycode from the scancode->keycode table |
d8b4b582 | 537 | * @idev: the struct input_dev device descriptor |
f67f366c | 538 | * @ke: Input keymap entry |
ef53a115 | 539 | * |
b3074c0a | 540 | * This routine is used to handle evdev EVIOCGKEY ioctl. |
f67f366c MCC |
541 | * |
542 | * return: always returns zero. | |
ef53a115 | 543 | */ |
d8b4b582 | 544 | static int ir_getkeycode(struct input_dev *idev, |
9f470095 | 545 | struct input_keymap_entry *ke) |
ef53a115 | 546 | { |
d8b4b582 | 547 | struct rc_dev *rdev = input_get_drvdata(idev); |
b088ba65 | 548 | struct rc_map *rc_map = &rdev->rc_map; |
2f4f58d6 | 549 | struct rc_map_table *entry; |
9f470095 DT |
550 | unsigned long flags; |
551 | unsigned int index; | |
e6c6d7d4 | 552 | u64 scancode; |
9f470095 | 553 | int retval; |
ef53a115 | 554 | |
b088ba65 | 555 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 DT |
556 | |
557 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { | |
558 | index = ke->index; | |
559 | } else { | |
e6c6d7d4 | 560 | retval = scancode_to_u64(ke, &scancode); |
9f470095 DT |
561 | if (retval) |
562 | goto out; | |
563 | ||
b088ba65 | 564 | index = ir_lookup_by_scancode(rc_map, scancode); |
9f470095 DT |
565 | } |
566 | ||
54e74b87 DT |
567 | if (index < rc_map->len) { |
568 | entry = &rc_map->scan[index]; | |
569 | ||
570 | ke->index = index; | |
571 | ke->keycode = entry->keycode; | |
572 | ke->len = sizeof(entry->scancode); | |
573 | memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode)); | |
54e74b87 DT |
574 | } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) { |
575 | /* | |
576 | * We do not really know the valid range of scancodes | |
577 | * so let's respond with KEY_RESERVED to anything we | |
578 | * do not have mapping for [yet]. | |
579 | */ | |
580 | ke->index = index; | |
581 | ke->keycode = KEY_RESERVED; | |
582 | } else { | |
9f470095 DT |
583 | retval = -EINVAL; |
584 | goto out; | |
e97f4677 MCC |
585 | } |
586 | ||
47c5ba53 DT |
587 | retval = 0; |
588 | ||
9f470095 | 589 | out: |
b088ba65 | 590 | spin_unlock_irqrestore(&rc_map->lock, flags); |
9f470095 | 591 | return retval; |
ef53a115 MCC |
592 | } |
593 | ||
594 | /** | |
ca86674b | 595 | * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode |
d8b4b582 DH |
596 | * @dev: the struct rc_dev descriptor of the device |
597 | * @scancode: the scancode to look for | |
ef53a115 | 598 | * |
d8b4b582 DH |
599 | * This routine is used by drivers which need to convert a scancode to a |
600 | * keycode. Normally it should not be used since drivers should have no | |
601 | * interest in keycodes. | |
f67f366c MCC |
602 | * |
603 | * return: the corresponding keycode, or KEY_RESERVED | |
ef53a115 | 604 | */ |
e6c6d7d4 | 605 | u32 rc_g_keycode_from_table(struct rc_dev *dev, u64 scancode) |
ef53a115 | 606 | { |
b088ba65 | 607 | struct rc_map *rc_map = &dev->rc_map; |
9f470095 DT |
608 | unsigned int keycode; |
609 | unsigned int index; | |
610 | unsigned long flags; | |
611 | ||
b088ba65 | 612 | spin_lock_irqsave(&rc_map->lock, flags); |
9f470095 | 613 | |
b088ba65 MCC |
614 | index = ir_lookup_by_scancode(rc_map, scancode); |
615 | keycode = index < rc_map->len ? | |
616 | rc_map->scan[index].keycode : KEY_RESERVED; | |
9f470095 | 617 | |
b088ba65 | 618 | spin_unlock_irqrestore(&rc_map->lock, flags); |
ef53a115 | 619 | |
35438946 | 620 | if (keycode != KEY_RESERVED) |
e6c6d7d4 | 621 | dev_dbg(&dev->dev, "%s: scancode 0x%04llx keycode 0x%02x\n", |
1f17f684 | 622 | dev->device_name, scancode, keycode); |
9f470095 | 623 | |
b3074c0a | 624 | return keycode; |
ef53a115 | 625 | } |
ca86674b | 626 | EXPORT_SYMBOL_GPL(rc_g_keycode_from_table); |
ef53a115 | 627 | |
6660de56 | 628 | /** |
62c65031 | 629 | * ir_do_keyup() - internal function to signal the release of a keypress |
d8b4b582 | 630 | * @dev: the struct rc_dev descriptor of the device |
98c32bcd | 631 | * @sync: whether or not to call input_sync |
6660de56 | 632 | * |
62c65031 DH |
633 | * This function is used internally to release a keypress, it must be |
634 | * called with keylock held. | |
a374fef4 | 635 | */ |
98c32bcd | 636 | static void ir_do_keyup(struct rc_dev *dev, bool sync) |
a374fef4 | 637 | { |
d8b4b582 | 638 | if (!dev->keypressed) |
a374fef4 DH |
639 | return; |
640 | ||
1f17f684 | 641 | dev_dbg(&dev->dev, "keyup key 0x%04x\n", dev->last_keycode); |
fb7ccc61 | 642 | del_timer(&dev->timer_repeat); |
d8b4b582 | 643 | input_report_key(dev->input_dev, dev->last_keycode, 0); |
153a60bb | 644 | led_trigger_event(led_feedback, LED_OFF); |
98c32bcd JW |
645 | if (sync) |
646 | input_sync(dev->input_dev); | |
d8b4b582 | 647 | dev->keypressed = false; |
a374fef4 | 648 | } |
62c65031 DH |
649 | |
650 | /** | |
ca86674b | 651 | * rc_keyup() - signals the release of a keypress |
d8b4b582 | 652 | * @dev: the struct rc_dev descriptor of the device |
62c65031 DH |
653 | * |
654 | * This routine is used to signal that a key has been released on the | |
655 | * remote control. | |
656 | */ | |
ca86674b | 657 | void rc_keyup(struct rc_dev *dev) |
62c65031 DH |
658 | { |
659 | unsigned long flags; | |
62c65031 | 660 | |
d8b4b582 | 661 | spin_lock_irqsave(&dev->keylock, flags); |
98c32bcd | 662 | ir_do_keyup(dev, true); |
d8b4b582 | 663 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 664 | } |
ca86674b | 665 | EXPORT_SYMBOL_GPL(rc_keyup); |
a374fef4 DH |
666 | |
667 | /** | |
668 | * ir_timer_keyup() - generates a keyup event after a timeout | |
f67f366c MCC |
669 | * |
670 | * @t: a pointer to the struct timer_list | |
a374fef4 DH |
671 | * |
672 | * This routine will generate a keyup event some time after a keydown event | |
673 | * is generated when no further activity has been detected. | |
6660de56 | 674 | */ |
b17ec78a | 675 | static void ir_timer_keyup(struct timer_list *t) |
6660de56 | 676 | { |
b17ec78a | 677 | struct rc_dev *dev = from_timer(dev, t, timer_keyup); |
a374fef4 DH |
678 | unsigned long flags; |
679 | ||
680 | /* | |
681 | * ir->keyup_jiffies is used to prevent a race condition if a | |
682 | * hardware interrupt occurs at this point and the keyup timer | |
683 | * event is moved further into the future as a result. | |
684 | * | |
685 | * The timer will then be reactivated and this function called | |
686 | * again in the future. We need to exit gracefully in that case | |
687 | * to allow the input subsystem to do its auto-repeat magic or | |
688 | * a keyup event might follow immediately after the keydown. | |
689 | */ | |
d8b4b582 DH |
690 | spin_lock_irqsave(&dev->keylock, flags); |
691 | if (time_is_before_eq_jiffies(dev->keyup_jiffies)) | |
98c32bcd | 692 | ir_do_keyup(dev, true); |
d8b4b582 | 693 | spin_unlock_irqrestore(&dev->keylock, flags); |
a374fef4 DH |
694 | } |
695 | ||
57c642cb SY |
696 | /** |
697 | * ir_timer_repeat() - generates a repeat event after a timeout | |
698 | * | |
699 | * @t: a pointer to the struct timer_list | |
700 | * | |
701 | * This routine will generate a soft repeat event every REP_PERIOD | |
702 | * milliseconds. | |
703 | */ | |
704 | static void ir_timer_repeat(struct timer_list *t) | |
705 | { | |
706 | struct rc_dev *dev = from_timer(dev, t, timer_repeat); | |
707 | struct input_dev *input = dev->input_dev; | |
708 | unsigned long flags; | |
709 | ||
710 | spin_lock_irqsave(&dev->keylock, flags); | |
711 | if (dev->keypressed) { | |
712 | input_event(input, EV_KEY, dev->last_keycode, 2); | |
713 | input_sync(input); | |
714 | if (input->rep[REP_PERIOD]) | |
715 | mod_timer(&dev->timer_repeat, jiffies + | |
716 | msecs_to_jiffies(input->rep[REP_PERIOD])); | |
717 | } | |
718 | spin_unlock_irqrestore(&dev->keylock, flags); | |
719 | } | |
720 | ||
f5dbee6e SY |
721 | static unsigned int repeat_period(int protocol) |
722 | { | |
723 | if (protocol >= ARRAY_SIZE(protocols)) | |
724 | return 100; | |
725 | ||
726 | return protocols[protocol].repeat_period; | |
727 | } | |
728 | ||
a374fef4 | 729 | /** |
ca86674b | 730 | * rc_repeat() - signals that a key is still pressed |
d8b4b582 | 731 | * @dev: the struct rc_dev descriptor of the device |
a374fef4 DH |
732 | * |
733 | * This routine is used by IR decoders when a repeat message which does | |
734 | * not include the necessary bits to reproduce the scancode has been | |
735 | * received. | |
736 | */ | |
ca86674b | 737 | void rc_repeat(struct rc_dev *dev) |
a374fef4 DH |
738 | { |
739 | unsigned long flags; | |
06b83158 | 740 | unsigned int timeout = usecs_to_jiffies(dev->timeout) + |
f5dbee6e | 741 | msecs_to_jiffies(repeat_period(dev->last_protocol)); |
b66218fd SY |
742 | struct lirc_scancode sc = { |
743 | .scancode = dev->last_scancode, .rc_proto = dev->last_protocol, | |
744 | .keycode = dev->keypressed ? dev->last_keycode : KEY_RESERVED, | |
745 | .flags = LIRC_SCANCODE_FLAG_REPEAT | | |
746 | (dev->last_toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0) | |
747 | }; | |
6660de56 | 748 | |
e5bb9d3d | 749 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
75992a44 | 750 | lirc_scancode_event(dev, &sc); |
a374fef4 | 751 | |
b66218fd | 752 | spin_lock_irqsave(&dev->keylock, flags); |
6660de56 | 753 | |
e6c6d7d4 SY |
754 | if (dev->last_scancode <= U32_MAX) { |
755 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, | |
756 | dev->last_scancode); | |
757 | input_sync(dev->input_dev); | |
758 | } | |
265a2988 | 759 | |
b66218fd | 760 | if (dev->keypressed) { |
28492256 | 761 | dev->keyup_jiffies = jiffies + timeout; |
b66218fd SY |
762 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); |
763 | } | |
a374fef4 | 764 | |
d8b4b582 | 765 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 766 | } |
ca86674b | 767 | EXPORT_SYMBOL_GPL(rc_repeat); |
6660de56 MCC |
768 | |
769 | /** | |
62c65031 | 770 | * ir_do_keydown() - internal function to process a keypress |
d8b4b582 | 771 | * @dev: the struct rc_dev descriptor of the device |
120703f9 | 772 | * @protocol: the protocol of the keypress |
62c65031 DH |
773 | * @scancode: the scancode of the keypress |
774 | * @keycode: the keycode of the keypress | |
775 | * @toggle: the toggle value of the keypress | |
6660de56 | 776 | * |
62c65031 DH |
777 | * This function is used internally to register a keypress, it must be |
778 | * called with keylock held. | |
6660de56 | 779 | */ |
6d741bfe | 780 | static void ir_do_keydown(struct rc_dev *dev, enum rc_proto protocol, |
e6c6d7d4 | 781 | u64 scancode, u32 keycode, u8 toggle) |
6660de56 | 782 | { |
99b0f3c9 | 783 | bool new_event = (!dev->keypressed || |
120703f9 | 784 | dev->last_protocol != protocol || |
99b0f3c9 | 785 | dev->last_scancode != scancode || |
120703f9 | 786 | dev->last_toggle != toggle); |
de142c32 SY |
787 | struct lirc_scancode sc = { |
788 | .scancode = scancode, .rc_proto = protocol, | |
b464763c MM |
789 | .flags = (toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0) | |
790 | (!new_event ? LIRC_SCANCODE_FLAG_REPEAT : 0), | |
de142c32 SY |
791 | .keycode = keycode |
792 | }; | |
793 | ||
e5bb9d3d | 794 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
75992a44 | 795 | lirc_scancode_event(dev, &sc); |
6660de56 | 796 | |
98c32bcd JW |
797 | if (new_event && dev->keypressed) |
798 | ir_do_keyup(dev, false); | |
6660de56 | 799 | |
e6c6d7d4 SY |
800 | if (scancode <= U32_MAX) |
801 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode); | |
a374fef4 | 802 | |
b66218fd SY |
803 | dev->last_protocol = protocol; |
804 | dev->last_scancode = scancode; | |
805 | dev->last_toggle = toggle; | |
806 | dev->last_keycode = keycode; | |
807 | ||
98c32bcd JW |
808 | if (new_event && keycode != KEY_RESERVED) { |
809 | /* Register a keypress */ | |
810 | dev->keypressed = true; | |
98c32bcd | 811 | |
e6c6d7d4 | 812 | dev_dbg(&dev->dev, "%s: key down event, key 0x%04x, protocol 0x%04x, scancode 0x%08llx\n", |
1f17f684 | 813 | dev->device_name, keycode, protocol, scancode); |
98c32bcd | 814 | input_report_key(dev->input_dev, keycode, 1); |
70a2f912 JH |
815 | |
816 | led_trigger_event(led_feedback, LED_FULL); | |
98c32bcd | 817 | } |
ed4d3876 | 818 | |
57c642cb SY |
819 | /* |
820 | * For CEC, start sending repeat messages as soon as the first | |
821 | * repeated message is sent, as long as REP_DELAY = 0 and REP_PERIOD | |
822 | * is non-zero. Otherwise, the input layer will generate repeat | |
823 | * messages. | |
824 | */ | |
825 | if (!new_event && keycode != KEY_RESERVED && | |
826 | dev->allowed_protocols == RC_PROTO_BIT_CEC && | |
827 | !timer_pending(&dev->timer_repeat) && | |
828 | dev->input_dev->rep[REP_PERIOD] && | |
829 | !dev->input_dev->rep[REP_DELAY]) { | |
830 | input_event(dev->input_dev, EV_KEY, keycode, 2); | |
831 | mod_timer(&dev->timer_repeat, jiffies + | |
832 | msecs_to_jiffies(dev->input_dev->rep[REP_PERIOD])); | |
833 | } | |
834 | ||
d8b4b582 | 835 | input_sync(dev->input_dev); |
62c65031 | 836 | } |
6660de56 | 837 | |
62c65031 | 838 | /** |
ca86674b | 839 | * rc_keydown() - generates input event for a key press |
d8b4b582 | 840 | * @dev: the struct rc_dev descriptor of the device |
120703f9 DH |
841 | * @protocol: the protocol for the keypress |
842 | * @scancode: the scancode for the keypress | |
62c65031 DH |
843 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't |
844 | * support toggle values, this should be set to zero) | |
845 | * | |
d8b4b582 DH |
846 | * This routine is used to signal that a key has been pressed on the |
847 | * remote control. | |
62c65031 | 848 | */ |
e6c6d7d4 | 849 | void rc_keydown(struct rc_dev *dev, enum rc_proto protocol, u64 scancode, |
6d741bfe | 850 | u8 toggle) |
62c65031 DH |
851 | { |
852 | unsigned long flags; | |
ca86674b | 853 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 854 | |
d8b4b582 | 855 | spin_lock_irqsave(&dev->keylock, flags); |
120703f9 | 856 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); |
62c65031 | 857 | |
d8b4b582 | 858 | if (dev->keypressed) { |
06b83158 | 859 | dev->keyup_jiffies = jiffies + usecs_to_jiffies(dev->timeout) + |
f5dbee6e | 860 | msecs_to_jiffies(repeat_period(protocol)); |
d8b4b582 | 861 | mod_timer(&dev->timer_keyup, dev->keyup_jiffies); |
62c65031 | 862 | } |
d8b4b582 | 863 | spin_unlock_irqrestore(&dev->keylock, flags); |
6660de56 | 864 | } |
ca86674b | 865 | EXPORT_SYMBOL_GPL(rc_keydown); |
6660de56 | 866 | |
62c65031 | 867 | /** |
ca86674b | 868 | * rc_keydown_notimeout() - generates input event for a key press without |
62c65031 | 869 | * an automatic keyup event at a later time |
d8b4b582 | 870 | * @dev: the struct rc_dev descriptor of the device |
120703f9 DH |
871 | * @protocol: the protocol for the keypress |
872 | * @scancode: the scancode for the keypress | |
62c65031 DH |
873 | * @toggle: the toggle value (protocol dependent, if the protocol doesn't |
874 | * support toggle values, this should be set to zero) | |
875 | * | |
d8b4b582 | 876 | * This routine is used to signal that a key has been pressed on the |
ca86674b | 877 | * remote control. The driver must manually call rc_keyup() at a later stage. |
62c65031 | 878 | */ |
6d741bfe | 879 | void rc_keydown_notimeout(struct rc_dev *dev, enum rc_proto protocol, |
e6c6d7d4 | 880 | u64 scancode, u8 toggle) |
62c65031 DH |
881 | { |
882 | unsigned long flags; | |
ca86674b | 883 | u32 keycode = rc_g_keycode_from_table(dev, scancode); |
62c65031 | 884 | |
d8b4b582 | 885 | spin_lock_irqsave(&dev->keylock, flags); |
120703f9 | 886 | ir_do_keydown(dev, protocol, scancode, keycode, toggle); |
d8b4b582 | 887 | spin_unlock_irqrestore(&dev->keylock, flags); |
62c65031 | 888 | } |
ca86674b | 889 | EXPORT_SYMBOL_GPL(rc_keydown_notimeout); |
62c65031 | 890 | |
49a4b36a | 891 | /** |
6b514c4a SY |
892 | * rc_validate_scancode() - checks that a scancode is valid for a protocol. |
893 | * For nec, it should do the opposite of ir_nec_bytes_to_scancode() | |
49a4b36a SY |
894 | * @proto: protocol |
895 | * @scancode: scancode | |
896 | */ | |
897 | bool rc_validate_scancode(enum rc_proto proto, u32 scancode) | |
898 | { | |
899 | switch (proto) { | |
6b514c4a SY |
900 | /* |
901 | * NECX has a 16-bit address; if the lower 8 bits match the upper | |
902 | * 8 bits inverted, then the address would match regular nec. | |
903 | */ | |
49a4b36a SY |
904 | case RC_PROTO_NECX: |
905 | if ((((scancode >> 16) ^ ~(scancode >> 8)) & 0xff) == 0) | |
906 | return false; | |
907 | break; | |
6b514c4a SY |
908 | /* |
909 | * NEC32 has a 16 bit address and 16 bit command. If the lower 8 bits | |
910 | * of the command match the upper 8 bits inverted, then it would | |
911 | * be either NEC or NECX. | |
912 | */ | |
49a4b36a | 913 | case RC_PROTO_NEC32: |
6b514c4a | 914 | if ((((scancode >> 8) ^ ~scancode) & 0xff) == 0) |
49a4b36a SY |
915 | return false; |
916 | break; | |
6b514c4a SY |
917 | /* |
918 | * If the customer code (top 32-bit) is 0x800f, it is MCE else it | |
919 | * is regular mode-6a 32 bit | |
920 | */ | |
49a4b36a SY |
921 | case RC_PROTO_RC6_MCE: |
922 | if ((scancode & 0xffff0000) != 0x800f0000) | |
923 | return false; | |
924 | break; | |
925 | case RC_PROTO_RC6_6A_32: | |
926 | if ((scancode & 0xffff0000) == 0x800f0000) | |
927 | return false; | |
928 | break; | |
929 | default: | |
930 | break; | |
931 | } | |
932 | ||
933 | return true; | |
934 | } | |
935 | ||
b590c0bf SY |
936 | /** |
937 | * rc_validate_filter() - checks that the scancode and mask are valid and | |
938 | * provides sensible defaults | |
f423ccc1 | 939 | * @dev: the struct rc_dev descriptor of the device |
b590c0bf | 940 | * @filter: the scancode and mask |
f67f366c MCC |
941 | * |
942 | * return: 0 or -EINVAL if the filter is not valid | |
b590c0bf | 943 | */ |
f423ccc1 | 944 | static int rc_validate_filter(struct rc_dev *dev, |
b590c0bf SY |
945 | struct rc_scancode_filter *filter) |
946 | { | |
d57ea877 | 947 | u32 mask, s = filter->data; |
6d741bfe | 948 | enum rc_proto protocol = dev->wakeup_protocol; |
b590c0bf | 949 | |
d57ea877 | 950 | if (protocol >= ARRAY_SIZE(protocols)) |
2168b416 SY |
951 | return -EINVAL; |
952 | ||
d57ea877 SY |
953 | mask = protocols[protocol].scancode_bits; |
954 | ||
49a4b36a SY |
955 | if (!rc_validate_scancode(protocol, s)) |
956 | return -EINVAL; | |
b590c0bf | 957 | |
d57ea877 SY |
958 | filter->data &= mask; |
959 | filter->mask &= mask; | |
b590c0bf | 960 | |
f423ccc1 JH |
961 | /* |
962 | * If we have to raw encode the IR for wakeup, we cannot have a mask | |
963 | */ | |
d57ea877 | 964 | if (dev->encode_wakeup && filter->mask != 0 && filter->mask != mask) |
f423ccc1 JH |
965 | return -EINVAL; |
966 | ||
b590c0bf SY |
967 | return 0; |
968 | } | |
969 | ||
8b2ff320 SK |
970 | int rc_open(struct rc_dev *rdev) |
971 | { | |
972 | int rval = 0; | |
973 | ||
974 | if (!rdev) | |
975 | return -EINVAL; | |
976 | ||
977 | mutex_lock(&rdev->lock); | |
c73bbaa4 | 978 | |
cb84343f SY |
979 | if (!rdev->registered) { |
980 | rval = -ENODEV; | |
981 | } else { | |
982 | if (!rdev->users++ && rdev->open) | |
983 | rval = rdev->open(rdev); | |
8b2ff320 | 984 | |
cb84343f SY |
985 | if (rval) |
986 | rdev->users--; | |
987 | } | |
8b2ff320 SK |
988 | |
989 | mutex_unlock(&rdev->lock); | |
990 | ||
991 | return rval; | |
992 | } | |
8b2ff320 | 993 | |
d8b4b582 | 994 | static int ir_open(struct input_dev *idev) |
ef53a115 | 995 | { |
d8b4b582 | 996 | struct rc_dev *rdev = input_get_drvdata(idev); |
75543cce | 997 | |
8b2ff320 SK |
998 | return rc_open(rdev); |
999 | } | |
1000 | ||
1001 | void rc_close(struct rc_dev *rdev) | |
1002 | { | |
1003 | if (rdev) { | |
1004 | mutex_lock(&rdev->lock); | |
1005 | ||
cb84343f | 1006 | if (!--rdev->users && rdev->close && rdev->registered) |
8b2ff320 SK |
1007 | rdev->close(rdev); |
1008 | ||
1009 | mutex_unlock(&rdev->lock); | |
1010 | } | |
ef53a115 | 1011 | } |
d4b778d3 | 1012 | |
d8b4b582 | 1013 | static void ir_close(struct input_dev *idev) |
f6fc5049 | 1014 | { |
d8b4b582 | 1015 | struct rc_dev *rdev = input_get_drvdata(idev); |
8b2ff320 | 1016 | rc_close(rdev); |
f6fc5049 | 1017 | } |
f6fc5049 | 1018 | |
bc2a6c57 | 1019 | /* class for /sys/class/rc */ |
ff62b8e6 | 1020 | static char *rc_devnode(const struct device *dev, umode_t *mode) |
bc2a6c57 MCC |
1021 | { |
1022 | return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev)); | |
1023 | } | |
1024 | ||
40fc5325 | 1025 | static struct class rc_class = { |
bc2a6c57 | 1026 | .name = "rc", |
40fc5325 | 1027 | .devnode = rc_devnode, |
bc2a6c57 MCC |
1028 | }; |
1029 | ||
c003ab1b DH |
1030 | /* |
1031 | * These are the protocol textual descriptions that are | |
1032 | * used by the sysfs protocols file. Note that the order | |
1033 | * of the entries is relevant. | |
1034 | */ | |
53df8777 | 1035 | static const struct { |
bc2a6c57 | 1036 | u64 type; |
53df8777 | 1037 | const char *name; |
9f0bf366 | 1038 | const char *module_name; |
bc2a6c57 | 1039 | } proto_names[] = { |
6d741bfe SY |
1040 | { RC_PROTO_BIT_NONE, "none", NULL }, |
1041 | { RC_PROTO_BIT_OTHER, "other", NULL }, | |
1042 | { RC_PROTO_BIT_UNKNOWN, "unknown", NULL }, | |
1043 | { RC_PROTO_BIT_RC5 | | |
1044 | RC_PROTO_BIT_RC5X_20, "rc-5", "ir-rc5-decoder" }, | |
1045 | { RC_PROTO_BIT_NEC | | |
1046 | RC_PROTO_BIT_NECX | | |
1047 | RC_PROTO_BIT_NEC32, "nec", "ir-nec-decoder" }, | |
1048 | { RC_PROTO_BIT_RC6_0 | | |
1049 | RC_PROTO_BIT_RC6_6A_20 | | |
1050 | RC_PROTO_BIT_RC6_6A_24 | | |
1051 | RC_PROTO_BIT_RC6_6A_32 | | |
1052 | RC_PROTO_BIT_RC6_MCE, "rc-6", "ir-rc6-decoder" }, | |
1053 | { RC_PROTO_BIT_JVC, "jvc", "ir-jvc-decoder" }, | |
1054 | { RC_PROTO_BIT_SONY12 | | |
1055 | RC_PROTO_BIT_SONY15 | | |
1056 | RC_PROTO_BIT_SONY20, "sony", "ir-sony-decoder" }, | |
1057 | { RC_PROTO_BIT_RC5_SZ, "rc-5-sz", "ir-rc5-decoder" }, | |
1058 | { RC_PROTO_BIT_SANYO, "sanyo", "ir-sanyo-decoder" }, | |
1059 | { RC_PROTO_BIT_SHARP, "sharp", "ir-sharp-decoder" }, | |
1060 | { RC_PROTO_BIT_MCIR2_KBD | | |
1061 | RC_PROTO_BIT_MCIR2_MSE, "mce_kbd", "ir-mce_kbd-decoder" }, | |
1062 | { RC_PROTO_BIT_XMP, "xmp", "ir-xmp-decoder" }, | |
1063 | { RC_PROTO_BIT_CEC, "cec", NULL }, | |
447dcc0c | 1064 | { RC_PROTO_BIT_IMON, "imon", "ir-imon-decoder" }, |
721074b0 PL |
1065 | { RC_PROTO_BIT_RCMM12 | |
1066 | RC_PROTO_BIT_RCMM24 | | |
1067 | RC_PROTO_BIT_RCMM32, "rc-mm", "ir-rcmm-decoder" }, | |
17287692 | 1068 | { RC_PROTO_BIT_XBOX_DVD, "xbox-dvd", NULL }, |
bc2a6c57 MCC |
1069 | }; |
1070 | ||
bc2a6c57 | 1071 | /** |
ab88c66d JH |
1072 | * struct rc_filter_attribute - Device attribute relating to a filter type. |
1073 | * @attr: Device attribute. | |
1074 | * @type: Filter type. | |
1075 | * @mask: false for filter value, true for filter mask. | |
1076 | */ | |
1077 | struct rc_filter_attribute { | |
1078 | struct device_attribute attr; | |
1079 | enum rc_filter_type type; | |
1080 | bool mask; | |
1081 | }; | |
1082 | #define to_rc_filter_attr(a) container_of(a, struct rc_filter_attribute, attr) | |
1083 | ||
ab88c66d JH |
1084 | #define RC_FILTER_ATTR(_name, _mode, _show, _store, _type, _mask) \ |
1085 | struct rc_filter_attribute dev_attr_##_name = { \ | |
1086 | .attr = __ATTR(_name, _mode, _show, _store), \ | |
1087 | .type = (_type), \ | |
1088 | .mask = (_mask), \ | |
1089 | } | |
1090 | ||
1091 | /** | |
0751d33c | 1092 | * show_protocols() - shows the current IR protocol(s) |
d8b4b582 | 1093 | * @device: the device descriptor |
da6e162d | 1094 | * @mattr: the device attribute struct |
bc2a6c57 MCC |
1095 | * @buf: a pointer to the output buffer |
1096 | * | |
1097 | * This routine is a callback routine for input read the IR protocol type(s). | |
04ad3011 | 1098 | * it is triggered by reading /sys/class/rc/rc?/protocols. |
bc2a6c57 MCC |
1099 | * It returns the protocol names of supported protocols. |
1100 | * Enabled protocols are printed in brackets. | |
08aeb7c9 | 1101 | * |
18726a34 DH |
1102 | * dev->lock is taken to guard against races between |
1103 | * store_protocols and show_protocols. | |
bc2a6c57 | 1104 | */ |
d8b4b582 | 1105 | static ssize_t show_protocols(struct device *device, |
bc2a6c57 MCC |
1106 | struct device_attribute *mattr, char *buf) |
1107 | { | |
d8b4b582 | 1108 | struct rc_dev *dev = to_rc_dev(device); |
bc2a6c57 MCC |
1109 | u64 allowed, enabled; |
1110 | char *tmp = buf; | |
1111 | int i; | |
1112 | ||
08aeb7c9 JW |
1113 | mutex_lock(&dev->lock); |
1114 | ||
0751d33c SY |
1115 | enabled = dev->enabled_protocols; |
1116 | allowed = dev->allowed_protocols; | |
1117 | if (dev->raw && !allowed) | |
1118 | allowed = ir_raw_get_allowed_protocols(); | |
bc2a6c57 | 1119 | |
da6e162d DH |
1120 | mutex_unlock(&dev->lock); |
1121 | ||
1f17f684 SY |
1122 | dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - 0x%llx\n", |
1123 | __func__, (long long)allowed, (long long)enabled); | |
bc2a6c57 MCC |
1124 | |
1125 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
1126 | if (allowed & enabled & proto_names[i].type) | |
1127 | tmp += sprintf(tmp, "[%s] ", proto_names[i].name); | |
1128 | else if (allowed & proto_names[i].type) | |
1129 | tmp += sprintf(tmp, "%s ", proto_names[i].name); | |
c003ab1b DH |
1130 | |
1131 | if (allowed & proto_names[i].type) | |
1132 | allowed &= ~proto_names[i].type; | |
bc2a6c57 MCC |
1133 | } |
1134 | ||
a60d64b1 SY |
1135 | #ifdef CONFIG_LIRC |
1136 | if (dev->driver_type == RC_DRIVER_IR_RAW) | |
275ddb40 | 1137 | tmp += sprintf(tmp, "[lirc] "); |
a60d64b1 | 1138 | #endif |
275ddb40 | 1139 | |
bc2a6c57 MCC |
1140 | if (tmp != buf) |
1141 | tmp--; | |
1142 | *tmp = '\n'; | |
08aeb7c9 | 1143 | |
bc2a6c57 MCC |
1144 | return tmp + 1 - buf; |
1145 | } | |
1146 | ||
1147 | /** | |
da6e162d | 1148 | * parse_protocol_change() - parses a protocol change request |
1f17f684 | 1149 | * @dev: rc_dev device |
da6e162d DH |
1150 | * @protocols: pointer to the bitmask of current protocols |
1151 | * @buf: pointer to the buffer with a list of changes | |
bc2a6c57 | 1152 | * |
da6e162d DH |
1153 | * Writing "+proto" will add a protocol to the protocol mask. |
1154 | * Writing "-proto" will remove a protocol from protocol mask. | |
bc2a6c57 MCC |
1155 | * Writing "proto" will enable only "proto". |
1156 | * Writing "none" will disable all protocols. | |
da6e162d | 1157 | * Returns the number of changes performed or a negative error code. |
bc2a6c57 | 1158 | */ |
1f17f684 SY |
1159 | static int parse_protocol_change(struct rc_dev *dev, u64 *protocols, |
1160 | const char *buf) | |
bc2a6c57 | 1161 | { |
bc2a6c57 | 1162 | const char *tmp; |
da6e162d DH |
1163 | unsigned count = 0; |
1164 | bool enable, disable; | |
bc2a6c57 | 1165 | u64 mask; |
da6e162d | 1166 | int i; |
bc2a6c57 | 1167 | |
da6e162d | 1168 | while ((tmp = strsep((char **)&buf, " \n")) != NULL) { |
bc2a6c57 MCC |
1169 | if (!*tmp) |
1170 | break; | |
1171 | ||
1172 | if (*tmp == '+') { | |
1173 | enable = true; | |
1174 | disable = false; | |
1175 | tmp++; | |
1176 | } else if (*tmp == '-') { | |
1177 | enable = false; | |
1178 | disable = true; | |
1179 | tmp++; | |
1180 | } else { | |
1181 | enable = false; | |
1182 | disable = false; | |
1183 | } | |
1184 | ||
c003ab1b DH |
1185 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { |
1186 | if (!strcasecmp(tmp, proto_names[i].name)) { | |
1187 | mask = proto_names[i].type; | |
1188 | break; | |
bc2a6c57 | 1189 | } |
bc2a6c57 MCC |
1190 | } |
1191 | ||
c003ab1b | 1192 | if (i == ARRAY_SIZE(proto_names)) { |
275ddb40 DH |
1193 | if (!strcasecmp(tmp, "lirc")) |
1194 | mask = 0; | |
1195 | else { | |
1f17f684 SY |
1196 | dev_dbg(&dev->dev, "Unknown protocol: '%s'\n", |
1197 | tmp); | |
275ddb40 DH |
1198 | return -EINVAL; |
1199 | } | |
c003ab1b DH |
1200 | } |
1201 | ||
1202 | count++; | |
1203 | ||
bc2a6c57 | 1204 | if (enable) |
da6e162d | 1205 | *protocols |= mask; |
bc2a6c57 | 1206 | else if (disable) |
da6e162d | 1207 | *protocols &= ~mask; |
bc2a6c57 | 1208 | else |
da6e162d | 1209 | *protocols = mask; |
bc2a6c57 MCC |
1210 | } |
1211 | ||
1212 | if (!count) { | |
1f17f684 | 1213 | dev_dbg(&dev->dev, "Protocol not specified\n"); |
da6e162d DH |
1214 | return -EINVAL; |
1215 | } | |
1216 | ||
1217 | return count; | |
1218 | } | |
1219 | ||
0d39ab0b | 1220 | void ir_raw_load_modules(u64 *protocols) |
9f0bf366 HK |
1221 | { |
1222 | u64 available; | |
1223 | int i, ret; | |
1224 | ||
1225 | for (i = 0; i < ARRAY_SIZE(proto_names); i++) { | |
6d741bfe SY |
1226 | if (proto_names[i].type == RC_PROTO_BIT_NONE || |
1227 | proto_names[i].type & (RC_PROTO_BIT_OTHER | | |
1228 | RC_PROTO_BIT_UNKNOWN)) | |
9f0bf366 HK |
1229 | continue; |
1230 | ||
1231 | available = ir_raw_get_allowed_protocols(); | |
1232 | if (!(*protocols & proto_names[i].type & ~available)) | |
1233 | continue; | |
1234 | ||
1235 | if (!proto_names[i].module_name) { | |
1236 | pr_err("Can't enable IR protocol %s\n", | |
1237 | proto_names[i].name); | |
1238 | *protocols &= ~proto_names[i].type; | |
1239 | continue; | |
1240 | } | |
1241 | ||
1242 | ret = request_module("%s", proto_names[i].module_name); | |
1243 | if (ret < 0) { | |
1244 | pr_err("Couldn't load IR protocol module %s\n", | |
1245 | proto_names[i].module_name); | |
1246 | *protocols &= ~proto_names[i].type; | |
1247 | continue; | |
1248 | } | |
1249 | msleep(20); | |
1250 | available = ir_raw_get_allowed_protocols(); | |
1251 | if (!(*protocols & proto_names[i].type & ~available)) | |
1252 | continue; | |
1253 | ||
8caebcdc | 1254 | pr_err("Loaded IR protocol module %s, but protocol %s still not available\n", |
9f0bf366 HK |
1255 | proto_names[i].module_name, |
1256 | proto_names[i].name); | |
1257 | *protocols &= ~proto_names[i].type; | |
1258 | } | |
1259 | } | |
1260 | ||
da6e162d DH |
1261 | /** |
1262 | * store_protocols() - changes the current/wakeup IR protocol(s) | |
1263 | * @device: the device descriptor | |
1264 | * @mattr: the device attribute struct | |
1265 | * @buf: a pointer to the input buffer | |
1266 | * @len: length of the input buffer | |
1267 | * | |
1268 | * This routine is for changing the IR protocol type. | |
04ad3011 | 1269 | * It is triggered by writing to /sys/class/rc/rc?/[wakeup_]protocols. |
da6e162d DH |
1270 | * See parse_protocol_change() for the valid commands. |
1271 | * Returns @len on success or a negative error code. | |
1272 | * | |
18726a34 DH |
1273 | * dev->lock is taken to guard against races between |
1274 | * store_protocols and show_protocols. | |
da6e162d DH |
1275 | */ |
1276 | static ssize_t store_protocols(struct device *device, | |
1277 | struct device_attribute *mattr, | |
1278 | const char *buf, size_t len) | |
1279 | { | |
1280 | struct rc_dev *dev = to_rc_dev(device); | |
da6e162d | 1281 | u64 *current_protocols; |
da6e162d | 1282 | struct rc_scancode_filter *filter; |
da6e162d DH |
1283 | u64 old_protocols, new_protocols; |
1284 | ssize_t rc; | |
1285 | ||
1f17f684 | 1286 | dev_dbg(&dev->dev, "Normal protocol change requested\n"); |
0751d33c SY |
1287 | current_protocols = &dev->enabled_protocols; |
1288 | filter = &dev->scancode_filter; | |
da6e162d | 1289 | |
0751d33c | 1290 | if (!dev->change_protocol) { |
1f17f684 | 1291 | dev_dbg(&dev->dev, "Protocol switching not supported\n"); |
da6e162d DH |
1292 | return -EINVAL; |
1293 | } | |
1294 | ||
1295 | mutex_lock(&dev->lock); | |
a2e2d73f SY |
1296 | if (!dev->registered) { |
1297 | mutex_unlock(&dev->lock); | |
1298 | return -ENODEV; | |
1299 | } | |
da6e162d DH |
1300 | |
1301 | old_protocols = *current_protocols; | |
1302 | new_protocols = old_protocols; | |
1f17f684 | 1303 | rc = parse_protocol_change(dev, &new_protocols, buf); |
da6e162d DH |
1304 | if (rc < 0) |
1305 | goto out; | |
1306 | ||
a86d6df8 SY |
1307 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1308 | ir_raw_load_modules(&new_protocols); | |
1309 | ||
0751d33c | 1310 | rc = dev->change_protocol(dev, &new_protocols); |
da6e162d | 1311 | if (rc < 0) { |
1f17f684 SY |
1312 | dev_dbg(&dev->dev, "Error setting protocols to 0x%llx\n", |
1313 | (long long)new_protocols); | |
08aeb7c9 | 1314 | goto out; |
bc2a6c57 MCC |
1315 | } |
1316 | ||
983c5bd2 JH |
1317 | if (new_protocols != old_protocols) { |
1318 | *current_protocols = new_protocols; | |
1f17f684 SY |
1319 | dev_dbg(&dev->dev, "Protocols changed to 0x%llx\n", |
1320 | (long long)new_protocols); | |
bc2a6c57 MCC |
1321 | } |
1322 | ||
6bea25af | 1323 | /* |
983c5bd2 JH |
1324 | * If a protocol change was attempted the filter may need updating, even |
1325 | * if the actual protocol mask hasn't changed (since the driver may have | |
1326 | * cleared the filter). | |
6bea25af JH |
1327 | * Try setting the same filter with the new protocol (if any). |
1328 | * Fall back to clearing the filter. | |
1329 | */ | |
0751d33c | 1330 | if (dev->s_filter && filter->mask) { |
da6e162d | 1331 | if (new_protocols) |
0751d33c | 1332 | rc = dev->s_filter(dev, filter); |
da6e162d DH |
1333 | else |
1334 | rc = -1; | |
6bea25af | 1335 | |
da6e162d DH |
1336 | if (rc < 0) { |
1337 | filter->data = 0; | |
1338 | filter->mask = 0; | |
0751d33c | 1339 | dev->s_filter(dev, filter); |
da6e162d | 1340 | } |
6bea25af JH |
1341 | } |
1342 | ||
da6e162d | 1343 | rc = len; |
08aeb7c9 JW |
1344 | |
1345 | out: | |
1346 | mutex_unlock(&dev->lock); | |
da6e162d | 1347 | return rc; |
bc2a6c57 MCC |
1348 | } |
1349 | ||
00942d1a JH |
1350 | /** |
1351 | * show_filter() - shows the current scancode filter value or mask | |
1352 | * @device: the device descriptor | |
1353 | * @attr: the device attribute struct | |
1354 | * @buf: a pointer to the output buffer | |
1355 | * | |
1356 | * This routine is a callback routine to read a scancode filter value or mask. | |
04ad3011 | 1357 | * It is triggered by reading /sys/class/rc/rc?/[wakeup_]filter[_mask]. |
00942d1a JH |
1358 | * It prints the current scancode filter value or mask of the appropriate filter |
1359 | * type in hexadecimal into @buf and returns the size of the buffer. | |
1360 | * | |
1361 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1362 | * compared against input scancodes and non-matching scancodes are discarded. | |
1363 | * | |
18726a34 | 1364 | * dev->lock is taken to guard against races between |
00942d1a JH |
1365 | * store_filter and show_filter. |
1366 | */ | |
1367 | static ssize_t show_filter(struct device *device, | |
1368 | struct device_attribute *attr, | |
1369 | char *buf) | |
1370 | { | |
1371 | struct rc_dev *dev = to_rc_dev(device); | |
1372 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
da6e162d | 1373 | struct rc_scancode_filter *filter; |
00942d1a JH |
1374 | u32 val; |
1375 | ||
c73bbaa4 | 1376 | mutex_lock(&dev->lock); |
c73bbaa4 | 1377 | |
da6e162d | 1378 | if (fattr->type == RC_FILTER_NORMAL) |
c5540fbb | 1379 | filter = &dev->scancode_filter; |
da6e162d | 1380 | else |
c5540fbb | 1381 | filter = &dev->scancode_wakeup_filter; |
da6e162d | 1382 | |
da6e162d DH |
1383 | if (fattr->mask) |
1384 | val = filter->mask; | |
00942d1a | 1385 | else |
da6e162d | 1386 | val = filter->data; |
00942d1a JH |
1387 | mutex_unlock(&dev->lock); |
1388 | ||
1389 | return sprintf(buf, "%#x\n", val); | |
1390 | } | |
1391 | ||
1392 | /** | |
1393 | * store_filter() - changes the scancode filter value | |
1394 | * @device: the device descriptor | |
1395 | * @attr: the device attribute struct | |
1396 | * @buf: a pointer to the input buffer | |
1397 | * @len: length of the input buffer | |
1398 | * | |
1399 | * This routine is for changing a scancode filter value or mask. | |
04ad3011 | 1400 | * It is triggered by writing to /sys/class/rc/rc?/[wakeup_]filter[_mask]. |
00942d1a JH |
1401 | * Returns -EINVAL if an invalid filter value for the current protocol was |
1402 | * specified or if scancode filtering is not supported by the driver, otherwise | |
1403 | * returns @len. | |
1404 | * | |
1405 | * Bits of the filter value corresponding to set bits in the filter mask are | |
1406 | * compared against input scancodes and non-matching scancodes are discarded. | |
1407 | * | |
18726a34 | 1408 | * dev->lock is taken to guard against races between |
00942d1a JH |
1409 | * store_filter and show_filter. |
1410 | */ | |
1411 | static ssize_t store_filter(struct device *device, | |
1412 | struct device_attribute *attr, | |
da6e162d | 1413 | const char *buf, size_t len) |
00942d1a JH |
1414 | { |
1415 | struct rc_dev *dev = to_rc_dev(device); | |
1416 | struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); | |
da6e162d | 1417 | struct rc_scancode_filter new_filter, *filter; |
00942d1a JH |
1418 | int ret; |
1419 | unsigned long val; | |
23c843b5 | 1420 | int (*set_filter)(struct rc_dev *dev, struct rc_scancode_filter *filter); |
00942d1a | 1421 | |
00942d1a JH |
1422 | ret = kstrtoul(buf, 0, &val); |
1423 | if (ret < 0) | |
1424 | return ret; | |
1425 | ||
da6e162d DH |
1426 | if (fattr->type == RC_FILTER_NORMAL) { |
1427 | set_filter = dev->s_filter; | |
c5540fbb | 1428 | filter = &dev->scancode_filter; |
da6e162d DH |
1429 | } else { |
1430 | set_filter = dev->s_wakeup_filter; | |
c5540fbb | 1431 | filter = &dev->scancode_wakeup_filter; |
da6e162d DH |
1432 | } |
1433 | ||
99b0f3c9 DH |
1434 | if (!set_filter) |
1435 | return -EINVAL; | |
00942d1a JH |
1436 | |
1437 | mutex_lock(&dev->lock); | |
a2e2d73f SY |
1438 | if (!dev->registered) { |
1439 | mutex_unlock(&dev->lock); | |
1440 | return -ENODEV; | |
1441 | } | |
00942d1a | 1442 | |
da6e162d | 1443 | new_filter = *filter; |
00942d1a | 1444 | if (fattr->mask) |
da6e162d | 1445 | new_filter.mask = val; |
00942d1a | 1446 | else |
da6e162d | 1447 | new_filter.data = val; |
23c843b5 | 1448 | |
0751d33c | 1449 | if (fattr->type == RC_FILTER_WAKEUP) { |
b590c0bf SY |
1450 | /* |
1451 | * Refuse to set a filter unless a protocol is enabled | |
1452 | * and the filter is valid for that protocol | |
1453 | */ | |
6d741bfe | 1454 | if (dev->wakeup_protocol != RC_PROTO_UNKNOWN) |
f423ccc1 | 1455 | ret = rc_validate_filter(dev, &new_filter); |
b590c0bf | 1456 | else |
0751d33c | 1457 | ret = -EINVAL; |
b590c0bf SY |
1458 | |
1459 | if (ret != 0) | |
0751d33c | 1460 | goto unlock; |
0751d33c SY |
1461 | } |
1462 | ||
1463 | if (fattr->type == RC_FILTER_NORMAL && !dev->enabled_protocols && | |
1464 | val) { | |
6bea25af JH |
1465 | /* refuse to set a filter unless a protocol is enabled */ |
1466 | ret = -EINVAL; | |
1467 | goto unlock; | |
1468 | } | |
23c843b5 | 1469 | |
da6e162d | 1470 | ret = set_filter(dev, &new_filter); |
99b0f3c9 DH |
1471 | if (ret < 0) |
1472 | goto unlock; | |
00942d1a | 1473 | |
da6e162d | 1474 | *filter = new_filter; |
00942d1a JH |
1475 | |
1476 | unlock: | |
1477 | mutex_unlock(&dev->lock); | |
da6e162d | 1478 | return (ret < 0) ? ret : len; |
00942d1a JH |
1479 | } |
1480 | ||
0751d33c SY |
1481 | /** |
1482 | * show_wakeup_protocols() - shows the wakeup IR protocol | |
1483 | * @device: the device descriptor | |
1484 | * @mattr: the device attribute struct | |
1485 | * @buf: a pointer to the output buffer | |
1486 | * | |
1487 | * This routine is a callback routine for input read the IR protocol type(s). | |
04ad3011 | 1488 | * it is triggered by reading /sys/class/rc/rc?/wakeup_protocols. |
0751d33c SY |
1489 | * It returns the protocol names of supported protocols. |
1490 | * The enabled protocols are printed in brackets. | |
1491 | * | |
18726a34 DH |
1492 | * dev->lock is taken to guard against races between |
1493 | * store_wakeup_protocols and show_wakeup_protocols. | |
0751d33c SY |
1494 | */ |
1495 | static ssize_t show_wakeup_protocols(struct device *device, | |
1496 | struct device_attribute *mattr, | |
1497 | char *buf) | |
1498 | { | |
1499 | struct rc_dev *dev = to_rc_dev(device); | |
1500 | u64 allowed; | |
6d741bfe | 1501 | enum rc_proto enabled; |
0751d33c SY |
1502 | char *tmp = buf; |
1503 | int i; | |
1504 | ||
0751d33c SY |
1505 | mutex_lock(&dev->lock); |
1506 | ||
1507 | allowed = dev->allowed_wakeup_protocols; | |
1508 | enabled = dev->wakeup_protocol; | |
1509 | ||
1510 | mutex_unlock(&dev->lock); | |
1511 | ||
1f17f684 SY |
1512 | dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - %d\n", |
1513 | __func__, (long long)allowed, enabled); | |
0751d33c | 1514 | |
d57ea877 | 1515 | for (i = 0; i < ARRAY_SIZE(protocols); i++) { |
0751d33c SY |
1516 | if (allowed & (1ULL << i)) { |
1517 | if (i == enabled) | |
d57ea877 | 1518 | tmp += sprintf(tmp, "[%s] ", protocols[i].name); |
0751d33c | 1519 | else |
d57ea877 | 1520 | tmp += sprintf(tmp, "%s ", protocols[i].name); |
0751d33c SY |
1521 | } |
1522 | } | |
1523 | ||
1524 | if (tmp != buf) | |
1525 | tmp--; | |
1526 | *tmp = '\n'; | |
1527 | ||
1528 | return tmp + 1 - buf; | |
1529 | } | |
1530 | ||
1531 | /** | |
1532 | * store_wakeup_protocols() - changes the wakeup IR protocol(s) | |
1533 | * @device: the device descriptor | |
1534 | * @mattr: the device attribute struct | |
1535 | * @buf: a pointer to the input buffer | |
1536 | * @len: length of the input buffer | |
1537 | * | |
1538 | * This routine is for changing the IR protocol type. | |
04ad3011 | 1539 | * It is triggered by writing to /sys/class/rc/rc?/wakeup_protocols. |
0751d33c SY |
1540 | * Returns @len on success or a negative error code. |
1541 | * | |
18726a34 DH |
1542 | * dev->lock is taken to guard against races between |
1543 | * store_wakeup_protocols and show_wakeup_protocols. | |
0751d33c SY |
1544 | */ |
1545 | static ssize_t store_wakeup_protocols(struct device *device, | |
1546 | struct device_attribute *mattr, | |
1547 | const char *buf, size_t len) | |
1548 | { | |
1549 | struct rc_dev *dev = to_rc_dev(device); | |
3d351531 | 1550 | enum rc_proto protocol = RC_PROTO_UNKNOWN; |
0751d33c SY |
1551 | ssize_t rc; |
1552 | u64 allowed; | |
1553 | int i; | |
1554 | ||
0751d33c | 1555 | mutex_lock(&dev->lock); |
a2e2d73f SY |
1556 | if (!dev->registered) { |
1557 | mutex_unlock(&dev->lock); | |
1558 | return -ENODEV; | |
1559 | } | |
0751d33c SY |
1560 | |
1561 | allowed = dev->allowed_wakeup_protocols; | |
1562 | ||
3d351531 | 1563 | if (!sysfs_streq(buf, "none")) { |
d57ea877 | 1564 | for (i = 0; i < ARRAY_SIZE(protocols); i++) { |
0751d33c | 1565 | if ((allowed & (1ULL << i)) && |
d57ea877 | 1566 | sysfs_streq(buf, protocols[i].name)) { |
0751d33c SY |
1567 | protocol = i; |
1568 | break; | |
1569 | } | |
1570 | } | |
1571 | ||
d57ea877 | 1572 | if (i == ARRAY_SIZE(protocols)) { |
0751d33c SY |
1573 | rc = -EINVAL; |
1574 | goto out; | |
1575 | } | |
f423ccc1 JH |
1576 | |
1577 | if (dev->encode_wakeup) { | |
1578 | u64 mask = 1ULL << protocol; | |
1579 | ||
1580 | ir_raw_load_modules(&mask); | |
1581 | if (!mask) { | |
1582 | rc = -EINVAL; | |
1583 | goto out; | |
1584 | } | |
1585 | } | |
0751d33c SY |
1586 | } |
1587 | ||
1588 | if (dev->wakeup_protocol != protocol) { | |
1589 | dev->wakeup_protocol = protocol; | |
1f17f684 | 1590 | dev_dbg(&dev->dev, "Wakeup protocol changed to %d\n", protocol); |
0751d33c | 1591 | |
6d741bfe | 1592 | if (protocol == RC_PROTO_RC6_MCE) |
0751d33c SY |
1593 | dev->scancode_wakeup_filter.data = 0x800f0000; |
1594 | else | |
1595 | dev->scancode_wakeup_filter.data = 0; | |
1596 | dev->scancode_wakeup_filter.mask = 0; | |
1597 | ||
1598 | rc = dev->s_wakeup_filter(dev, &dev->scancode_wakeup_filter); | |
1599 | if (rc == 0) | |
1600 | rc = len; | |
1601 | } else { | |
1602 | rc = len; | |
1603 | } | |
1604 | ||
1605 | out: | |
1606 | mutex_unlock(&dev->lock); | |
1607 | return rc; | |
1608 | } | |
1609 | ||
d8b4b582 DH |
1610 | static void rc_dev_release(struct device *device) |
1611 | { | |
47cae1e1 MK |
1612 | struct rc_dev *dev = to_rc_dev(device); |
1613 | ||
1614 | kfree(dev); | |
d8b4b582 DH |
1615 | } |
1616 | ||
162736b0 | 1617 | static int rc_dev_uevent(const struct device *device, struct kobj_uevent_env *env) |
bc2a6c57 | 1618 | { |
d8b4b582 | 1619 | struct rc_dev *dev = to_rc_dev(device); |
4f0835d6 | 1620 | int ret = 0; |
bc2a6c57 | 1621 | |
4f0835d6 | 1622 | mutex_lock(&dev->lock); |
bc2a6c57 | 1623 | |
4f0835d6 SY |
1624 | if (!dev->registered) |
1625 | ret = -ENODEV; | |
1626 | if (ret == 0 && dev->rc_map.name) | |
1627 | ret = add_uevent_var(env, "NAME=%s", dev->rc_map.name); | |
1628 | if (ret == 0 && dev->driver_name) | |
1629 | ret = add_uevent_var(env, "DRV_NAME=%s", dev->driver_name); | |
1630 | if (ret == 0 && dev->device_name) | |
1631 | ret = add_uevent_var(env, "DEV_NAME=%s", dev->device_name); | |
1632 | ||
1633 | mutex_unlock(&dev->lock); | |
1634 | ||
1635 | return ret; | |
bc2a6c57 MCC |
1636 | } |
1637 | ||
1638 | /* | |
1639 | * Static device attribute struct with the sysfs attributes for IR's | |
1640 | */ | |
6d75db30 SY |
1641 | static struct device_attribute dev_attr_ro_protocols = |
1642 | __ATTR(protocols, 0444, show_protocols, NULL); | |
1643 | static struct device_attribute dev_attr_rw_protocols = | |
1644 | __ATTR(protocols, 0644, show_protocols, store_protocols); | |
0751d33c SY |
1645 | static DEVICE_ATTR(wakeup_protocols, 0644, show_wakeup_protocols, |
1646 | store_wakeup_protocols); | |
00942d1a JH |
1647 | static RC_FILTER_ATTR(filter, S_IRUGO|S_IWUSR, |
1648 | show_filter, store_filter, RC_FILTER_NORMAL, false); | |
1649 | static RC_FILTER_ATTR(filter_mask, S_IRUGO|S_IWUSR, | |
1650 | show_filter, store_filter, RC_FILTER_NORMAL, true); | |
1651 | static RC_FILTER_ATTR(wakeup_filter, S_IRUGO|S_IWUSR, | |
1652 | show_filter, store_filter, RC_FILTER_WAKEUP, false); | |
1653 | static RC_FILTER_ATTR(wakeup_filter_mask, S_IRUGO|S_IWUSR, | |
1654 | show_filter, store_filter, RC_FILTER_WAKEUP, true); | |
bc2a6c57 | 1655 | |
6d75db30 SY |
1656 | static struct attribute *rc_dev_rw_protocol_attrs[] = { |
1657 | &dev_attr_rw_protocols.attr, | |
99b0f3c9 DH |
1658 | NULL, |
1659 | }; | |
1660 | ||
6d75db30 SY |
1661 | static const struct attribute_group rc_dev_rw_protocol_attr_grp = { |
1662 | .attrs = rc_dev_rw_protocol_attrs, | |
1663 | }; | |
1664 | ||
1665 | static struct attribute *rc_dev_ro_protocol_attrs[] = { | |
1666 | &dev_attr_ro_protocols.attr, | |
1667 | NULL, | |
1668 | }; | |
1669 | ||
1670 | static const struct attribute_group rc_dev_ro_protocol_attr_grp = { | |
1671 | .attrs = rc_dev_ro_protocol_attrs, | |
99b0f3c9 DH |
1672 | }; |
1673 | ||
99b0f3c9 | 1674 | static struct attribute *rc_dev_filter_attrs[] = { |
00942d1a JH |
1675 | &dev_attr_filter.attr.attr, |
1676 | &dev_attr_filter_mask.attr.attr, | |
bc2a6c57 MCC |
1677 | NULL, |
1678 | }; | |
1679 | ||
db68102c | 1680 | static const struct attribute_group rc_dev_filter_attr_grp = { |
99b0f3c9 | 1681 | .attrs = rc_dev_filter_attrs, |
bc2a6c57 MCC |
1682 | }; |
1683 | ||
99b0f3c9 DH |
1684 | static struct attribute *rc_dev_wakeup_filter_attrs[] = { |
1685 | &dev_attr_wakeup_filter.attr.attr, | |
1686 | &dev_attr_wakeup_filter_mask.attr.attr, | |
0751d33c | 1687 | &dev_attr_wakeup_protocols.attr, |
99b0f3c9 DH |
1688 | NULL, |
1689 | }; | |
1690 | ||
db68102c | 1691 | static const struct attribute_group rc_dev_wakeup_filter_attr_grp = { |
99b0f3c9 | 1692 | .attrs = rc_dev_wakeup_filter_attrs, |
bc2a6c57 MCC |
1693 | }; |
1694 | ||
f03f02f9 | 1695 | static const struct device_type rc_dev_type = { |
d8b4b582 | 1696 | .release = rc_dev_release, |
bc2a6c57 MCC |
1697 | .uevent = rc_dev_uevent, |
1698 | }; | |
1699 | ||
0f7499fd | 1700 | struct rc_dev *rc_allocate_device(enum rc_driver_type type) |
bc2a6c57 | 1701 | { |
d8b4b582 | 1702 | struct rc_dev *dev; |
bc2a6c57 | 1703 | |
d8b4b582 DH |
1704 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1705 | if (!dev) | |
1706 | return NULL; | |
1707 | ||
d34aee10 AS |
1708 | if (type != RC_DRIVER_IR_RAW_TX) { |
1709 | dev->input_dev = input_allocate_device(); | |
1710 | if (!dev->input_dev) { | |
1711 | kfree(dev); | |
1712 | return NULL; | |
1713 | } | |
1714 | ||
1715 | dev->input_dev->getkeycode = ir_getkeycode; | |
1716 | dev->input_dev->setkeycode = ir_setkeycode; | |
1717 | input_set_drvdata(dev->input_dev, dev); | |
d8b4b582 | 1718 | |
28492256 | 1719 | dev->timeout = IR_DEFAULT_TIMEOUT; |
b17ec78a | 1720 | timer_setup(&dev->timer_keyup, ir_timer_keyup, 0); |
57c642cb | 1721 | timer_setup(&dev->timer_repeat, ir_timer_repeat, 0); |
d8b4b582 | 1722 | |
d34aee10 AS |
1723 | spin_lock_init(&dev->rc_map.lock); |
1724 | spin_lock_init(&dev->keylock); | |
1725 | } | |
08aeb7c9 | 1726 | mutex_init(&dev->lock); |
bc2a6c57 | 1727 | |
d8b4b582 | 1728 | dev->dev.type = &rc_dev_type; |
40fc5325 | 1729 | dev->dev.class = &rc_class; |
d8b4b582 DH |
1730 | device_initialize(&dev->dev); |
1731 | ||
0f7499fd AS |
1732 | dev->driver_type = type; |
1733 | ||
d8b4b582 DH |
1734 | __module_get(THIS_MODULE); |
1735 | return dev; | |
1736 | } | |
1737 | EXPORT_SYMBOL_GPL(rc_allocate_device); | |
1738 | ||
1739 | void rc_free_device(struct rc_dev *dev) | |
bc2a6c57 | 1740 | { |
b05681b9 MCC |
1741 | if (!dev) |
1742 | return; | |
1743 | ||
3dd94f00 | 1744 | input_free_device(dev->input_dev); |
b05681b9 MCC |
1745 | |
1746 | put_device(&dev->dev); | |
1747 | ||
47cae1e1 MK |
1748 | /* kfree(dev) will be called by the callback function |
1749 | rc_dev_release() */ | |
1750 | ||
b05681b9 | 1751 | module_put(THIS_MODULE); |
d8b4b582 DH |
1752 | } |
1753 | EXPORT_SYMBOL_GPL(rc_free_device); | |
1754 | ||
ddbf7d5a HK |
1755 | static void devm_rc_alloc_release(struct device *dev, void *res) |
1756 | { | |
1757 | rc_free_device(*(struct rc_dev **)res); | |
1758 | } | |
1759 | ||
0f7499fd AS |
1760 | struct rc_dev *devm_rc_allocate_device(struct device *dev, |
1761 | enum rc_driver_type type) | |
ddbf7d5a HK |
1762 | { |
1763 | struct rc_dev **dr, *rc; | |
1764 | ||
1765 | dr = devres_alloc(devm_rc_alloc_release, sizeof(*dr), GFP_KERNEL); | |
1766 | if (!dr) | |
1767 | return NULL; | |
1768 | ||
0f7499fd | 1769 | rc = rc_allocate_device(type); |
ddbf7d5a HK |
1770 | if (!rc) { |
1771 | devres_free(dr); | |
1772 | return NULL; | |
1773 | } | |
1774 | ||
1775 | rc->dev.parent = dev; | |
1776 | rc->managed_alloc = true; | |
1777 | *dr = rc; | |
1778 | devres_add(dev, dr); | |
1779 | ||
1780 | return rc; | |
1781 | } | |
1782 | EXPORT_SYMBOL_GPL(devm_rc_allocate_device); | |
1783 | ||
f56928ab | 1784 | static int rc_prepare_rx_device(struct rc_dev *dev) |
d8b4b582 | 1785 | { |
fcb13097 | 1786 | int rc; |
7ff2c2bc | 1787 | struct rc_map *rc_map; |
6d741bfe | 1788 | u64 rc_proto; |
bc2a6c57 | 1789 | |
7ff2c2bc | 1790 | if (!dev->map_name) |
d8b4b582 | 1791 | return -EINVAL; |
bc2a6c57 | 1792 | |
d100e659 | 1793 | rc_map = rc_map_get(dev->map_name); |
b088ba65 | 1794 | if (!rc_map) |
d100e659 | 1795 | rc_map = rc_map_get(RC_MAP_EMPTY); |
b088ba65 | 1796 | if (!rc_map || !rc_map->scan || rc_map->size == 0) |
d8b4b582 DH |
1797 | return -EINVAL; |
1798 | ||
7ff2c2bc AS |
1799 | rc = ir_setkeytable(dev, rc_map); |
1800 | if (rc) | |
1801 | return rc; | |
1802 | ||
6d741bfe | 1803 | rc_proto = BIT_ULL(rc_map->rc_proto); |
7ff2c2bc | 1804 | |
831c4c81 SY |
1805 | if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol) |
1806 | dev->enabled_protocols = dev->allowed_protocols; | |
1807 | ||
a86d6df8 SY |
1808 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
1809 | ir_raw_load_modules(&rc_proto); | |
1810 | ||
41380868 | 1811 | if (dev->change_protocol) { |
6d741bfe | 1812 | rc = dev->change_protocol(dev, &rc_proto); |
7ff2c2bc AS |
1813 | if (rc < 0) |
1814 | goto out_table; | |
6d741bfe | 1815 | dev->enabled_protocols = rc_proto; |
7ff2c2bc AS |
1816 | } |
1817 | ||
0ac5a603 | 1818 | /* Keyboard events */ |
d8b4b582 DH |
1819 | set_bit(EV_KEY, dev->input_dev->evbit); |
1820 | set_bit(EV_REP, dev->input_dev->evbit); | |
1821 | set_bit(EV_MSC, dev->input_dev->evbit); | |
1822 | set_bit(MSC_SCAN, dev->input_dev->mscbit); | |
fec225a0 | 1823 | |
0ac5a603 | 1824 | /* Pointer/mouse events */ |
ce819649 | 1825 | set_bit(INPUT_PROP_POINTING_STICK, dev->input_dev->propbit); |
0ac5a603 SY |
1826 | set_bit(EV_REL, dev->input_dev->evbit); |
1827 | set_bit(REL_X, dev->input_dev->relbit); | |
1828 | set_bit(REL_Y, dev->input_dev->relbit); | |
1829 | ||
d8b4b582 DH |
1830 | if (dev->open) |
1831 | dev->input_dev->open = ir_open; | |
1832 | if (dev->close) | |
1833 | dev->input_dev->close = ir_close; | |
1834 | ||
b2aceb73 DH |
1835 | dev->input_dev->dev.parent = &dev->dev; |
1836 | memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id)); | |
1837 | dev->input_dev->phys = dev->input_phys; | |
518f4b26 | 1838 | dev->input_dev->name = dev->device_name; |
b2aceb73 | 1839 | |
f56928ab DH |
1840 | return 0; |
1841 | ||
1842 | out_table: | |
1843 | ir_free_table(&dev->rc_map); | |
1844 | ||
1845 | return rc; | |
1846 | } | |
1847 | ||
1848 | static int rc_setup_rx_device(struct rc_dev *dev) | |
1849 | { | |
1850 | int rc; | |
1851 | ||
b2aceb73 DH |
1852 | /* rc_open will be called here */ |
1853 | rc = input_register_device(dev->input_dev); | |
1854 | if (rc) | |
f56928ab | 1855 | return rc; |
b2aceb73 | 1856 | |
7ff2c2bc AS |
1857 | /* |
1858 | * Default delay of 250ms is too short for some protocols, especially | |
1859 | * since the timeout is currently set to 250ms. Increase it to 500ms, | |
1860 | * to avoid wrong repetition of the keycodes. Note that this must be | |
1861 | * set after the call to input_register_device(). | |
1862 | */ | |
57c642cb SY |
1863 | if (dev->allowed_protocols == RC_PROTO_BIT_CEC) |
1864 | dev->input_dev->rep[REP_DELAY] = 0; | |
1865 | else | |
1866 | dev->input_dev->rep[REP_DELAY] = 500; | |
7ff2c2bc AS |
1867 | |
1868 | /* | |
1869 | * As a repeat event on protocols like RC-5 and NEC take as long as | |
1870 | * 110/114ms, using 33ms as a repeat period is not the right thing | |
1871 | * to do. | |
1872 | */ | |
1873 | dev->input_dev->rep[REP_PERIOD] = 125; | |
1874 | ||
7ff2c2bc | 1875 | return 0; |
7ff2c2bc AS |
1876 | } |
1877 | ||
1878 | static void rc_free_rx_device(struct rc_dev *dev) | |
1879 | { | |
f56928ab | 1880 | if (!dev) |
7ff2c2bc AS |
1881 | return; |
1882 | ||
f56928ab DH |
1883 | if (dev->input_dev) { |
1884 | input_unregister_device(dev->input_dev); | |
1885 | dev->input_dev = NULL; | |
1886 | } | |
7ff2c2bc | 1887 | |
f56928ab | 1888 | ir_free_table(&dev->rc_map); |
7ff2c2bc AS |
1889 | } |
1890 | ||
1891 | int rc_register_device(struct rc_dev *dev) | |
1892 | { | |
7ff2c2bc AS |
1893 | const char *path; |
1894 | int attr = 0; | |
1895 | int minor; | |
1896 | int rc; | |
1897 | ||
1898 | if (!dev) | |
1899 | return -EINVAL; | |
1900 | ||
cd54ff93 | 1901 | minor = ida_alloc_max(&rc_ida, RC_DEV_MAX - 1, GFP_KERNEL); |
fcb13097 DH |
1902 | if (minor < 0) |
1903 | return minor; | |
1904 | ||
1905 | dev->minor = minor; | |
1906 | dev_set_name(&dev->dev, "rc%u", dev->minor); | |
1907 | dev_set_drvdata(&dev->dev, dev); | |
587d1b06 | 1908 | |
99b0f3c9 | 1909 | dev->dev.groups = dev->sysfs_groups; |
6d75db30 SY |
1910 | if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol) |
1911 | dev->sysfs_groups[attr++] = &rc_dev_ro_protocol_attr_grp; | |
1912 | else if (dev->driver_type != RC_DRIVER_IR_RAW_TX) | |
1913 | dev->sysfs_groups[attr++] = &rc_dev_rw_protocol_attr_grp; | |
99b0f3c9 | 1914 | if (dev->s_filter) |
120703f9 | 1915 | dev->sysfs_groups[attr++] = &rc_dev_filter_attr_grp; |
99b0f3c9 DH |
1916 | if (dev->s_wakeup_filter) |
1917 | dev->sysfs_groups[attr++] = &rc_dev_wakeup_filter_attr_grp; | |
99b0f3c9 DH |
1918 | dev->sysfs_groups[attr++] = NULL; |
1919 | ||
a60d64b1 | 1920 | if (dev->driver_type == RC_DRIVER_IR_RAW) { |
f56928ab DH |
1921 | rc = ir_raw_event_prepare(dev); |
1922 | if (rc < 0) | |
1923 | goto out_minor; | |
1924 | } | |
1925 | ||
1926 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { | |
1927 | rc = rc_prepare_rx_device(dev); | |
1928 | if (rc) | |
1929 | goto out_raw; | |
1930 | } | |
1931 | ||
896111dc SY |
1932 | dev->registered = true; |
1933 | ||
d8b4b582 DH |
1934 | rc = device_add(&dev->dev); |
1935 | if (rc) | |
f56928ab | 1936 | goto out_rx_free; |
bc2a6c57 | 1937 | |
d8b4b582 | 1938 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
4dc0e908 | 1939 | dev_info(&dev->dev, "%s as %s\n", |
518f4b26 | 1940 | dev->device_name ?: "Unspecified device", path ?: "N/A"); |
bc2a6c57 MCC |
1941 | kfree(path); |
1942 | ||
080d89f5 | 1943 | /* |
86541f04 | 1944 | * once the input device is registered in rc_setup_rx_device, |
080d89f5 SY |
1945 | * userspace can open the input device and rc_open() will be called |
1946 | * as a result. This results in driver code being allowed to submit | |
1947 | * keycodes with rc_keydown, so lirc must be registered first. | |
1948 | */ | |
62d6f199 | 1949 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) { |
75992a44 | 1950 | rc = lirc_register(dev); |
d8b4b582 | 1951 | if (rc < 0) |
080d89f5 SY |
1952 | goto out_dev; |
1953 | } | |
1954 | ||
1955 | if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { | |
1956 | rc = rc_setup_rx_device(dev); | |
1957 | if (rc) | |
1958 | goto out_lirc; | |
d8b4b582 DH |
1959 | } |
1960 | ||
a60d64b1 SY |
1961 | if (dev->driver_type == RC_DRIVER_IR_RAW) { |
1962 | rc = ir_raw_event_register(dev); | |
1963 | if (rc < 0) | |
080d89f5 | 1964 | goto out_rx; |
a60d64b1 SY |
1965 | } |
1966 | ||
1f17f684 SY |
1967 | dev_dbg(&dev->dev, "Registered rc%u (driver: %s)\n", dev->minor, |
1968 | dev->driver_name ? dev->driver_name : "unknown"); | |
d8b4b582 | 1969 | |
bc2a6c57 | 1970 | return 0; |
d8b4b582 | 1971 | |
080d89f5 SY |
1972 | out_rx: |
1973 | rc_free_rx_device(dev); | |
a60d64b1 | 1974 | out_lirc: |
62d6f199 | 1975 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
75992a44 | 1976 | lirc_unregister(dev); |
d8b4b582 DH |
1977 | out_dev: |
1978 | device_del(&dev->dev); | |
f56928ab DH |
1979 | out_rx_free: |
1980 | ir_free_table(&dev->rc_map); | |
1981 | out_raw: | |
1982 | ir_raw_event_free(dev); | |
1983 | out_minor: | |
cd54ff93 | 1984 | ida_free(&rc_ida, minor); |
d8b4b582 | 1985 | return rc; |
bc2a6c57 | 1986 | } |
d8b4b582 | 1987 | EXPORT_SYMBOL_GPL(rc_register_device); |
bc2a6c57 | 1988 | |
ddbf7d5a HK |
1989 | static void devm_rc_release(struct device *dev, void *res) |
1990 | { | |
1991 | rc_unregister_device(*(struct rc_dev **)res); | |
1992 | } | |
1993 | ||
1994 | int devm_rc_register_device(struct device *parent, struct rc_dev *dev) | |
1995 | { | |
1996 | struct rc_dev **dr; | |
1997 | int ret; | |
1998 | ||
1999 | dr = devres_alloc(devm_rc_release, sizeof(*dr), GFP_KERNEL); | |
2000 | if (!dr) | |
2001 | return -ENOMEM; | |
2002 | ||
2003 | ret = rc_register_device(dev); | |
2004 | if (ret) { | |
2005 | devres_free(dr); | |
2006 | return ret; | |
2007 | } | |
2008 | ||
2009 | *dr = dev; | |
2010 | devres_add(parent, dr); | |
2011 | ||
2012 | return 0; | |
2013 | } | |
2014 | EXPORT_SYMBOL_GPL(devm_rc_register_device); | |
2015 | ||
d8b4b582 | 2016 | void rc_unregister_device(struct rc_dev *dev) |
bc2a6c57 | 2017 | { |
d8b4b582 DH |
2018 | if (!dev) |
2019 | return; | |
bc2a6c57 | 2020 | |
d8b4b582 DH |
2021 | if (dev->driver_type == RC_DRIVER_IR_RAW) |
2022 | ir_raw_event_unregister(dev); | |
2023 | ||
8d406881 SY |
2024 | del_timer_sync(&dev->timer_keyup); |
2025 | del_timer_sync(&dev->timer_repeat); | |
2026 | ||
7790e81f | 2027 | mutex_lock(&dev->lock); |
8e782fcf SY |
2028 | if (dev->users && dev->close) |
2029 | dev->close(dev); | |
7790e81f SY |
2030 | dev->registered = false; |
2031 | mutex_unlock(&dev->lock); | |
2032 | ||
4f0835d6 SY |
2033 | rc_free_rx_device(dev); |
2034 | ||
7790e81f SY |
2035 | /* |
2036 | * lirc device should be freed with dev->registered = false, so | |
2037 | * that userspace polling will get notified. | |
2038 | */ | |
62d6f199 | 2039 | if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
75992a44 | 2040 | lirc_unregister(dev); |
a60d64b1 | 2041 | |
b05681b9 | 2042 | device_del(&dev->dev); |
d8b4b582 | 2043 | |
cd54ff93 | 2044 | ida_free(&rc_ida, dev->minor); |
fcb13097 | 2045 | |
ddbf7d5a HK |
2046 | if (!dev->managed_alloc) |
2047 | rc_free_device(dev); | |
bc2a6c57 | 2048 | } |
b05681b9 | 2049 | |
d8b4b582 | 2050 | EXPORT_SYMBOL_GPL(rc_unregister_device); |
bc2a6c57 MCC |
2051 | |
2052 | /* | |
2053 | * Init/exit code for the module. Basically, creates/removes /sys/class/rc | |
2054 | */ | |
2055 | ||
6bda9644 | 2056 | static int __init rc_core_init(void) |
bc2a6c57 | 2057 | { |
40fc5325 | 2058 | int rc = class_register(&rc_class); |
bc2a6c57 | 2059 | if (rc) { |
d3d96820 | 2060 | pr_err("rc_core: unable to register rc class\n"); |
bc2a6c57 MCC |
2061 | return rc; |
2062 | } | |
2063 | ||
a60d64b1 SY |
2064 | rc = lirc_dev_init(); |
2065 | if (rc) { | |
2066 | pr_err("rc_core: unable to init lirc\n"); | |
2067 | class_unregister(&rc_class); | |
3b4cfc69 | 2068 | return rc; |
a60d64b1 SY |
2069 | } |
2070 | ||
153a60bb | 2071 | led_trigger_register_simple("rc-feedback", &led_feedback); |
d100e659 | 2072 | rc_map_register(&empty_map); |
f09f9f93 HV |
2073 | #ifdef CONFIG_MEDIA_CEC_RC |
2074 | rc_map_register(&cec_map); | |
2075 | #endif | |
bc2a6c57 MCC |
2076 | |
2077 | return 0; | |
2078 | } | |
2079 | ||
6bda9644 | 2080 | static void __exit rc_core_exit(void) |
bc2a6c57 | 2081 | { |
a60d64b1 | 2082 | lirc_dev_exit(); |
40fc5325 | 2083 | class_unregister(&rc_class); |
153a60bb | 2084 | led_trigger_unregister_simple(led_feedback); |
f09f9f93 HV |
2085 | #ifdef CONFIG_MEDIA_CEC_RC |
2086 | rc_map_unregister(&cec_map); | |
2087 | #endif | |
d100e659 | 2088 | rc_map_unregister(&empty_map); |
bc2a6c57 MCC |
2089 | } |
2090 | ||
e76d4ce4 | 2091 | subsys_initcall(rc_core_init); |
6bda9644 | 2092 | module_exit(rc_core_exit); |
bc2a6c57 | 2093 | |
37e59f87 | 2094 | MODULE_AUTHOR("Mauro Carvalho Chehab"); |
20835280 | 2095 | MODULE_LICENSE("GPL v2"); |