Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 1 | /* ir-nec-decoder.c - handle NEC IR Pulse/Space protocol |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 2 | * |
| 3 | * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation version 2 of the License. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | */ |
| 14 | |
| 15 | #include <media/ir-core.h> |
| 16 | |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 17 | #define NEC_UNIT 559979 /* ns */ |
| 18 | #define NEC_HEADER_MARK (16 * NEC_UNIT) |
| 19 | #define NEC_HEADER_SPACE (8 * NEC_UNIT) |
| 20 | #define NEC_REPEAT_SPACE (4 * NEC_UNIT) |
| 21 | #define NEC_MARK (NEC_UNIT) |
| 22 | #define NEC_0_SYMBOL (NEC_UNIT) |
| 23 | #define NEC_1_SYMBOL (3 * NEC_UNIT) |
| 24 | |
Mauro Carvalho Chehab | 9f15478 | 2010-03-21 13:00:55 -0300 | [diff] [blame] | 25 | /* Start time: 4.5 ms + 560 us of the next pulse */ |
| 26 | #define MIN_START_TIME (3900000 + 560000) |
| 27 | #define MAX_START_TIME (5100000 + 560000) |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 28 | |
Mauro Carvalho Chehab | 9f15478 | 2010-03-21 13:00:55 -0300 | [diff] [blame] | 29 | /* Bit 1 time: 2.25ms us */ |
| 30 | #define MIN_BIT1_TIME 2050000 |
| 31 | #define MAX_BIT1_TIME 2450000 |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 32 | |
Mauro Carvalho Chehab | 9f15478 | 2010-03-21 13:00:55 -0300 | [diff] [blame] | 33 | /* Bit 0 time: 1.12ms us */ |
| 34 | #define MIN_BIT0_TIME 920000 |
| 35 | #define MAX_BIT0_TIME 1320000 |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 36 | |
Mauro Carvalho Chehab | 9f15478 | 2010-03-21 13:00:55 -0300 | [diff] [blame] | 37 | /* Total IR code is 110 ms, including the 9 ms for the start pulse */ |
| 38 | #define MAX_NEC_TIME 4000000 |
| 39 | |
| 40 | /* Total IR code is 110 ms, including the 9 ms for the start pulse */ |
| 41 | #define MIN_REPEAT_TIME 99000000 |
| 42 | #define MAX_REPEAT_TIME 112000000 |
| 43 | |
| 44 | /* Repeat time: 2.25ms us */ |
| 45 | #define MIN_REPEAT_START_TIME 2050000 |
| 46 | #define MAX_REPEAT_START_TIME 3000000 |
| 47 | |
| 48 | #define REPEAT_TIME 240 /* ms */ |
| 49 | |
Mauro Carvalho Chehab | 20d5f11 | 2010-03-25 23:49:46 -0300 | [diff] [blame] | 50 | /* Used to register nec_decoder clients */ |
| 51 | static LIST_HEAD(decoder_list); |
| 52 | static spinlock_t decoder_lock; |
| 53 | |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 54 | enum nec_state { |
| 55 | STATE_INACTIVE, |
| 56 | STATE_HEADER_MARK, |
| 57 | STATE_HEADER_SPACE, |
| 58 | STATE_MARK, |
| 59 | STATE_SPACE, |
| 60 | STATE_TRAILER_MARK, |
| 61 | STATE_TRAILER_SPACE, |
| 62 | }; |
| 63 | |
| 64 | struct nec_code { |
| 65 | u8 address; |
| 66 | u8 not_address; |
| 67 | u8 command; |
| 68 | u8 not_command; |
| 69 | }; |
| 70 | |
Mauro Carvalho Chehab | 20d5f11 | 2010-03-25 23:49:46 -0300 | [diff] [blame] | 71 | struct decoder_data { |
| 72 | struct list_head list; |
| 73 | struct ir_input_dev *ir_dev; |
| 74 | int enabled:1; |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 75 | |
| 76 | /* State machine control */ |
| 77 | enum nec_state state; |
| 78 | struct nec_code nec_code; |
| 79 | unsigned count; |
Mauro Carvalho Chehab | 20d5f11 | 2010-03-25 23:49:46 -0300 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | |
| 83 | /** |
| 84 | * get_decoder_data() - gets decoder data |
| 85 | * @input_dev: input device |
| 86 | * |
| 87 | * Returns the struct decoder_data that corresponds to a device |
| 88 | */ |
| 89 | |
| 90 | static struct decoder_data *get_decoder_data(struct ir_input_dev *ir_dev) |
| 91 | { |
| 92 | struct decoder_data *data = NULL; |
| 93 | |
| 94 | spin_lock(&decoder_lock); |
| 95 | list_for_each_entry(data, &decoder_list, list) { |
| 96 | if (data->ir_dev == ir_dev) |
| 97 | break; |
| 98 | } |
| 99 | spin_unlock(&decoder_lock); |
| 100 | return data; |
| 101 | } |
| 102 | |
| 103 | static ssize_t store_enabled(struct device *d, |
| 104 | struct device_attribute *mattr, |
| 105 | const char *buf, |
| 106 | size_t len) |
| 107 | { |
| 108 | unsigned long value; |
| 109 | struct ir_input_dev *ir_dev = dev_get_drvdata(d); |
| 110 | struct decoder_data *data = get_decoder_data(ir_dev); |
| 111 | |
| 112 | if (!data) |
| 113 | return -EINVAL; |
| 114 | |
| 115 | if (strict_strtoul(buf, 10, &value) || value > 1) |
| 116 | return -EINVAL; |
| 117 | |
| 118 | data->enabled = value; |
| 119 | |
| 120 | return len; |
| 121 | } |
| 122 | |
| 123 | static ssize_t show_enabled(struct device *d, |
| 124 | struct device_attribute *mattr, char *buf) |
| 125 | { |
| 126 | struct ir_input_dev *ir_dev = dev_get_drvdata(d); |
| 127 | struct decoder_data *data = get_decoder_data(ir_dev); |
| 128 | |
| 129 | if (!data) |
| 130 | return -EINVAL; |
| 131 | |
| 132 | if (data->enabled) |
| 133 | return sprintf(buf, "1\n"); |
| 134 | else |
| 135 | return sprintf(buf, "0\n"); |
| 136 | } |
| 137 | |
| 138 | static DEVICE_ATTR(enabled, S_IRUGO | S_IWUSR, show_enabled, store_enabled); |
| 139 | |
| 140 | static struct attribute *decoder_attributes[] = { |
| 141 | &dev_attr_enabled.attr, |
| 142 | NULL |
| 143 | }; |
| 144 | |
| 145 | static struct attribute_group decoder_attribute_group = { |
| 146 | .name = "nec_decoder", |
| 147 | .attrs = decoder_attributes, |
| 148 | }; |
| 149 | |
| 150 | |
Mauro Carvalho Chehab | ada3963 | 2010-03-21 12:24:24 -0300 | [diff] [blame] | 151 | /** |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 152 | * handle_event() - Decode one NEC pulse or space |
Mauro Carvalho Chehab | ada3963 | 2010-03-21 12:24:24 -0300 | [diff] [blame] | 153 | * @input_dev: the struct input_dev descriptor of the device |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 154 | * @ev: event array with type/duration of pulse/space |
| 155 | * |
| 156 | * This function returns -EINVAL if the pulse violates the state machine |
Mauro Carvalho Chehab | ada3963 | 2010-03-21 12:24:24 -0300 | [diff] [blame] | 157 | */ |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 158 | static int handle_event(struct input_dev *input_dev, |
| 159 | struct ir_raw_event *ev) |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 160 | { |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 161 | struct decoder_data *data; |
| 162 | struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); |
| 163 | int bit, last_bit; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 164 | |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 165 | data = get_decoder_data(ir_dev); |
| 166 | if (!data) |
| 167 | return -EINVAL; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 168 | |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 169 | /* Except for the initial event, what matters is the previous bit */ |
| 170 | bit = (ev->type & IR_PULSE) ? 1 : 0; |
| 171 | |
| 172 | last_bit = !bit; |
| 173 | |
| 174 | /* Discards spurious space last_bits when inactive */ |
| 175 | |
| 176 | /* Very long delays are considered as start events */ |
| 177 | if (ev->delta.tv_nsec > NEC_HEADER_MARK + NEC_HEADER_SPACE - NEC_UNIT / 2) |
| 178 | data->state = STATE_INACTIVE; |
| 179 | |
| 180 | if (ev->type & IR_START_EVENT) |
| 181 | data->state = STATE_INACTIVE; |
| 182 | |
| 183 | switch (data->state) { |
| 184 | case STATE_INACTIVE: |
| 185 | if (!bit) /* PULSE marks the start event */ |
| 186 | return 0; |
| 187 | |
| 188 | data->count = 0; |
| 189 | data->state = STATE_HEADER_MARK; |
| 190 | memset (&data->nec_code, 0, sizeof(data->nec_code)); |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 191 | return 0; |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 192 | case STATE_HEADER_MARK: |
| 193 | if (!last_bit) |
| 194 | goto err; |
| 195 | if (ev->delta.tv_nsec < NEC_HEADER_MARK - 6 * NEC_UNIT) |
| 196 | goto err; |
| 197 | data->state = STATE_HEADER_SPACE; |
| 198 | return 0; |
| 199 | case STATE_HEADER_SPACE: |
| 200 | if (last_bit) |
| 201 | goto err; |
| 202 | if (ev->delta.tv_nsec >= NEC_HEADER_SPACE - NEC_UNIT / 2) { |
| 203 | data->state = STATE_MARK; |
Mauro Carvalho Chehab | 9f15478 | 2010-03-21 13:00:55 -0300 | [diff] [blame] | 204 | return 0; |
| 205 | } |
Mauro Carvalho Chehab | 9f15478 | 2010-03-21 13:00:55 -0300 | [diff] [blame] | 206 | |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 207 | if (ev->delta.tv_nsec >= NEC_REPEAT_SPACE - NEC_UNIT / 2) { |
| 208 | ir_repeat(input_dev); |
| 209 | IR_dprintk(1, "Repeat last key\n"); |
| 210 | data->state = STATE_TRAILER_MARK; |
| 211 | return 0; |
| 212 | } |
Mauro Carvalho Chehab | 9f15478 | 2010-03-21 13:00:55 -0300 | [diff] [blame] | 213 | goto err; |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 214 | case STATE_MARK: |
| 215 | if (!last_bit) |
| 216 | goto err; |
| 217 | if ((ev->delta.tv_nsec > NEC_MARK + NEC_UNIT / 2) || |
| 218 | (ev->delta.tv_nsec < NEC_MARK - NEC_UNIT / 2)) |
| 219 | goto err; |
| 220 | data->state = STATE_SPACE; |
| 221 | return 0; |
| 222 | case STATE_SPACE: |
| 223 | if (last_bit) |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 224 | goto err; |
| 225 | |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 226 | if ((ev->delta.tv_nsec >= NEC_0_SYMBOL - NEC_UNIT / 2) && |
| 227 | (ev->delta.tv_nsec < NEC_0_SYMBOL + NEC_UNIT / 2)) |
| 228 | bit = 0; |
| 229 | else if ((ev->delta.tv_nsec >= NEC_1_SYMBOL - NEC_UNIT / 2) && |
| 230 | (ev->delta.tv_nsec < NEC_1_SYMBOL + NEC_UNIT / 2)) |
| 231 | bit = 1; |
| 232 | else { |
| 233 | IR_dprintk(1, "Decode failed at %d-th bit (%s) @%luus\n", |
| 234 | data->count, |
| 235 | last_bit ? "pulse" : "space", |
| 236 | (ev->delta.tv_nsec + 500) / 1000); |
| 237 | |
| 238 | goto err2; |
| 239 | } |
| 240 | |
| 241 | /* Ok, we've got a valid bit. proccess it */ |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 242 | if (bit) { |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 243 | int shift = data->count; |
| 244 | |
| 245 | /* |
| 246 | * NEC transmit bytes on this temporal order: |
| 247 | * address | not address | command | not command |
| 248 | */ |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 249 | if (shift < 8) { |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 250 | data->nec_code.address |= 1 << shift; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 251 | } else if (shift < 16) { |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 252 | data->nec_code.not_address |= 1 << (shift - 8); |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 253 | } else if (shift < 24) { |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 254 | data->nec_code.command |= 1 << (shift - 16); |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 255 | } else { |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 256 | data->nec_code.not_command |= 1 << (shift - 24); |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 257 | } |
| 258 | } |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 259 | if (++data->count == 32) { |
| 260 | u32 scancode; |
| 261 | /* |
| 262 | * Fixme: may need to accept Extended NEC protocol? |
| 263 | */ |
| 264 | if ((data->nec_code.command ^ data->nec_code.not_command) != 0xff) |
| 265 | goto checksum_err; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 266 | |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 267 | if ((data->nec_code.address ^ data->nec_code.not_address) != 0xff) { |
| 268 | /* Extended NEC */ |
| 269 | scancode = data->nec_code.address << 16 | |
| 270 | data->nec_code.not_address << 8 | |
| 271 | data->nec_code.command; |
| 272 | IR_dprintk(1, "NEC scancode 0x%06x\n", scancode); |
| 273 | } else { |
| 274 | /* normal NEC */ |
| 275 | scancode = data->nec_code.address << 8 | |
| 276 | data->nec_code.command; |
| 277 | IR_dprintk(1, "NEC scancode 0x%04x\n", scancode); |
| 278 | } |
| 279 | ir_keydown(input_dev, scancode, 0); |
| 280 | |
| 281 | data->state = STATE_TRAILER_MARK; |
| 282 | } else |
| 283 | data->state = STATE_MARK; |
| 284 | return 0; |
| 285 | case STATE_TRAILER_MARK: |
| 286 | if (!last_bit) |
| 287 | goto err; |
| 288 | data->state = STATE_TRAILER_SPACE; |
| 289 | return 0; |
| 290 | case STATE_TRAILER_SPACE: |
| 291 | if (last_bit) |
| 292 | goto err; |
| 293 | data->state = STATE_INACTIVE; |
| 294 | return 0; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 295 | } |
| 296 | |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 297 | err: |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 298 | IR_dprintk(1, "NEC decoded failed at state %d (%s) @ %luus\n", |
| 299 | data->state, |
| 300 | bit ? "pulse" : "space", |
| 301 | (ev->delta.tv_nsec + 500) / 1000); |
| 302 | err2: |
| 303 | data->state = STATE_INACTIVE; |
| 304 | return -EINVAL; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 305 | |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 306 | checksum_err: |
| 307 | data->state = STATE_INACTIVE; |
| 308 | IR_dprintk(1, "NEC checksum error: received 0x%02x%02x%02x%02x\n", |
| 309 | data->nec_code.address, |
| 310 | data->nec_code.not_address, |
| 311 | data->nec_code.command, |
| 312 | data->nec_code.not_command); |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 313 | return -EINVAL; |
| 314 | } |
Mauro Carvalho Chehab | ada3963 | 2010-03-21 12:24:24 -0300 | [diff] [blame] | 315 | |
| 316 | /** |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 317 | * ir_nec_decode() - Decodes all NEC pulsecodes on a given array |
Mauro Carvalho Chehab | ada3963 | 2010-03-21 12:24:24 -0300 | [diff] [blame] | 318 | * @input_dev: the struct input_dev descriptor of the device |
| 319 | * @evs: event array with type/duration of pulse/space |
| 320 | * @len: length of the array |
Mauro Carvalho Chehab | 93c312f | 2010-03-25 21:13:43 -0300 | [diff] [blame] | 321 | * This function returns the number of decoded pulses |
Mauro Carvalho Chehab | ada3963 | 2010-03-21 12:24:24 -0300 | [diff] [blame] | 322 | */ |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 323 | static int ir_nec_decode(struct input_dev *input_dev, |
| 324 | struct ir_raw_event *evs, |
| 325 | int len) |
Mauro Carvalho Chehab | ada3963 | 2010-03-21 12:24:24 -0300 | [diff] [blame] | 326 | { |
Mauro Carvalho Chehab | 20d5f11 | 2010-03-25 23:49:46 -0300 | [diff] [blame] | 327 | struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); |
| 328 | struct decoder_data *data; |
Mauro Carvalho Chehab | ada3963 | 2010-03-21 12:24:24 -0300 | [diff] [blame] | 329 | int pos = 0; |
| 330 | int rc = 0; |
| 331 | |
Mauro Carvalho Chehab | 20d5f11 | 2010-03-25 23:49:46 -0300 | [diff] [blame] | 332 | data = get_decoder_data(ir_dev); |
| 333 | if (!data || !data->enabled) |
| 334 | return 0; |
| 335 | |
Mauro Carvalho Chehab | 2f16f63 | 2010-04-03 18:51:50 -0300 | [diff] [blame^] | 336 | for (pos = 0; pos < len; pos++) |
| 337 | handle_event(input_dev, &evs[pos]); |
| 338 | |
Mauro Carvalho Chehab | ada3963 | 2010-03-21 12:24:24 -0300 | [diff] [blame] | 339 | return rc; |
| 340 | } |
| 341 | |
Mauro Carvalho Chehab | 20d5f11 | 2010-03-25 23:49:46 -0300 | [diff] [blame] | 342 | static int ir_nec_register(struct input_dev *input_dev) |
| 343 | { |
| 344 | struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); |
| 345 | struct decoder_data *data; |
| 346 | int rc; |
| 347 | |
| 348 | rc = sysfs_create_group(&ir_dev->dev.kobj, &decoder_attribute_group); |
| 349 | if (rc < 0) |
| 350 | return rc; |
| 351 | |
| 352 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 353 | if (!data) { |
| 354 | sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group); |
| 355 | return -ENOMEM; |
| 356 | } |
| 357 | |
| 358 | data->ir_dev = ir_dev; |
| 359 | data->enabled = 1; |
| 360 | |
| 361 | spin_lock(&decoder_lock); |
| 362 | list_add_tail(&data->list, &decoder_list); |
| 363 | spin_unlock(&decoder_lock); |
| 364 | |
| 365 | return 0; |
| 366 | } |
| 367 | |
| 368 | static int ir_nec_unregister(struct input_dev *input_dev) |
| 369 | { |
| 370 | struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); |
| 371 | static struct decoder_data *data; |
| 372 | |
| 373 | data = get_decoder_data(ir_dev); |
| 374 | if (!data) |
| 375 | return 0; |
| 376 | |
| 377 | sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group); |
| 378 | |
| 379 | spin_lock(&decoder_lock); |
| 380 | list_del(&data->list); |
| 381 | spin_unlock(&decoder_lock); |
| 382 | |
| 383 | return 0; |
| 384 | } |
| 385 | |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 386 | static struct ir_raw_handler nec_handler = { |
Mauro Carvalho Chehab | 20d5f11 | 2010-03-25 23:49:46 -0300 | [diff] [blame] | 387 | .decode = ir_nec_decode, |
| 388 | .raw_register = ir_nec_register, |
| 389 | .raw_unregister = ir_nec_unregister, |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 390 | }; |
| 391 | |
| 392 | static int __init ir_nec_decode_init(void) |
| 393 | { |
| 394 | ir_raw_handler_register(&nec_handler); |
| 395 | |
| 396 | printk(KERN_INFO "IR NEC protocol handler initialized\n"); |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | static void __exit ir_nec_decode_exit(void) |
| 401 | { |
| 402 | ir_raw_handler_unregister(&nec_handler); |
| 403 | } |
| 404 | |
| 405 | module_init(ir_nec_decode_init); |
| 406 | module_exit(ir_nec_decode_exit); |
| 407 | |
| 408 | MODULE_LICENSE("GPL"); |
| 409 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); |
| 410 | MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)"); |
| 411 | MODULE_DESCRIPTION("NEC IR protocol decoder"); |