Commit | Line | Data |
---|---|---|
8e8e69d6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f5f2cc64 JW |
2 | /* ir-mce_kbd-decoder.c - A decoder for the RC6-ish keyboard/mouse IR protocol |
3 | * used by the Microsoft Remote Keyboard for Windows Media Center Edition, | |
4 | * referred to by Microsoft's Windows Media Center remote specification docs | |
5 | * as "an internal protocol called MCIR-2". | |
6 | * | |
7 | * Copyright (C) 2011 by Jarod Wilson <jarod@redhat.com> | |
f5f2cc64 | 8 | */ |
ee2ce3a0 | 9 | #include <linux/module.h> |
f5f2cc64 JW |
10 | |
11 | #include "rc-core-priv.h" | |
12 | ||
13 | /* | |
14 | * This decoder currently supports: | |
15 | * - MCIR-2 29-bit IR signals used for mouse movement and buttons | |
16 | * - MCIR-2 32-bit IR signals used for standard keyboard keys | |
17 | * | |
b73bc16d | 18 | * The media keys on the keyboard send RC-6 signals that are indistinguishable |
f5f2cc64 JW |
19 | * from the keys of the same name on the stock MCE remote, and will be handled |
20 | * by the standard RC-6 decoder, and be made available to the system via the | |
21 | * input device for the remote, rather than the keyboard/mouse one. | |
22 | */ | |
23 | ||
24 | #define MCIR2_UNIT 333333 /* ns */ | |
25 | #define MCIR2_HEADER_NBITS 5 | |
26 | #define MCIR2_MOUSE_NBITS 29 | |
27 | #define MCIR2_KEYBOARD_NBITS 32 | |
28 | #define MCIR2_PREFIX_PULSE (8 * MCIR2_UNIT) | |
29 | #define MCIR2_PREFIX_SPACE (1 * MCIR2_UNIT) | |
30 | #define MCIR2_MAX_LEN (3 * MCIR2_UNIT) | |
31 | #define MCIR2_BIT_START (1 * MCIR2_UNIT) | |
32 | #define MCIR2_BIT_END (1 * MCIR2_UNIT) | |
33 | #define MCIR2_BIT_0 (1 * MCIR2_UNIT) | |
34 | #define MCIR2_BIT_SET (2 * MCIR2_UNIT) | |
35 | #define MCIR2_MODE_MASK 0xf /* for the header bits */ | |
36 | #define MCIR2_KEYBOARD_HEADER 0x4 | |
37 | #define MCIR2_MOUSE_HEADER 0x1 | |
38 | #define MCIR2_MASK_KEYS_START 0xe0 | |
39 | ||
40 | enum mce_kbd_mode { | |
41 | MCIR2_MODE_KEYBOARD, | |
42 | MCIR2_MODE_MOUSE, | |
43 | MCIR2_MODE_UNKNOWN, | |
44 | }; | |
45 | ||
46 | enum mce_kbd_state { | |
47 | STATE_INACTIVE, | |
48 | STATE_HEADER_BIT_START, | |
49 | STATE_HEADER_BIT_END, | |
50 | STATE_BODY_BIT_START, | |
51 | STATE_BODY_BIT_END, | |
52 | STATE_FINISHED, | |
53 | }; | |
54 | ||
55 | static unsigned char kbd_keycodes[256] = { | |
56 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_A, | |
57 | KEY_B, KEY_C, KEY_D, KEY_E, KEY_F, | |
58 | KEY_G, KEY_H, KEY_I, KEY_J, KEY_K, | |
59 | KEY_L, KEY_M, KEY_N, KEY_O, KEY_P, | |
60 | KEY_Q, KEY_R, KEY_S, KEY_T, KEY_U, | |
61 | KEY_V, KEY_W, KEY_X, KEY_Y, KEY_Z, | |
62 | KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, | |
63 | KEY_6, KEY_7, KEY_8, KEY_9, KEY_0, | |
64 | KEY_ENTER, KEY_ESC, KEY_BACKSPACE, KEY_TAB, KEY_SPACE, | |
65 | KEY_MINUS, KEY_EQUAL, KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, | |
44750606 | 66 | KEY_BACKSLASH, KEY_SEMICOLON, KEY_APOSTROPHE, KEY_GRAVE, KEY_COMMA, |
f5f2cc64 JW |
67 | KEY_DOT, KEY_SLASH, KEY_CAPSLOCK, KEY_F1, KEY_F2, |
68 | KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, | |
69 | KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, | |
70 | KEY_SYSRQ, KEY_SCROLLLOCK, KEY_PAUSE, KEY_INSERT, KEY_HOME, | |
71 | KEY_PAGEUP, KEY_DELETE, KEY_END, KEY_PAGEDOWN, KEY_RIGHT, | |
72 | KEY_LEFT, KEY_DOWN, KEY_UP, KEY_NUMLOCK, KEY_KPSLASH, | |
73 | KEY_KPASTERISK, KEY_KPMINUS, KEY_KPPLUS, KEY_KPENTER, KEY_KP1, | |
74 | KEY_KP2, KEY_KP3, KEY_KP4, KEY_KP5, KEY_KP6, | |
75 | KEY_KP7, KEY_KP8, KEY_KP9, KEY_KP0, KEY_KPDOT, | |
76 | KEY_102ND, KEY_COMPOSE, KEY_POWER, KEY_KPEQUAL, KEY_F13, | |
77 | KEY_F14, KEY_F15, KEY_F16, KEY_F17, KEY_F18, | |
78 | KEY_F19, KEY_F20, KEY_F21, KEY_F22, KEY_F23, | |
79 | KEY_F24, KEY_OPEN, KEY_HELP, KEY_PROPS, KEY_FRONT, | |
80 | KEY_STOP, KEY_AGAIN, KEY_UNDO, KEY_CUT, KEY_COPY, | |
81 | KEY_PASTE, KEY_FIND, KEY_MUTE, KEY_VOLUMEUP, KEY_VOLUMEDOWN, | |
82 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_KPCOMMA, KEY_RESERVED, | |
83 | KEY_RO, KEY_KATAKANAHIRAGANA, KEY_YEN, KEY_HENKAN, KEY_MUHENKAN, | |
84 | KEY_KPJPCOMMA, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_HANGUEL, | |
85 | KEY_HANJA, KEY_KATAKANA, KEY_HIRAGANA, KEY_ZENKAKUHANKAKU, KEY_RESERVED, | |
86 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
87 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
88 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
89 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
90 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
91 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
92 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
93 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
94 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
95 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
96 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
97 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
98 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
99 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
100 | KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_LEFTCTRL, | |
101 | KEY_LEFTSHIFT, KEY_LEFTALT, KEY_LEFTMETA, KEY_RIGHTCTRL, KEY_RIGHTSHIFT, | |
102 | KEY_RIGHTALT, KEY_RIGHTMETA, KEY_PLAYPAUSE, KEY_STOPCD, KEY_PREVIOUSSONG, | |
103 | KEY_NEXTSONG, KEY_EJECTCD, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE, | |
104 | KEY_WWW, KEY_BACK, KEY_FORWARD, KEY_STOP, KEY_FIND, | |
105 | KEY_SCROLLUP, KEY_SCROLLDOWN, KEY_EDIT, KEY_SLEEP, KEY_COFFEE, | |
106 | KEY_REFRESH, KEY_CALC, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, | |
107 | KEY_RESERVED | |
108 | }; | |
109 | ||
b17ec78a | 110 | static void mce_kbd_rx_timeout(struct timer_list *t) |
f5f2cc64 | 111 | { |
50078a90 | 112 | struct ir_raw_event_ctrl *raw = from_timer(raw, t, mce_kbd.rx_timeout); |
f5f2cc64 | 113 | unsigned char maskcode; |
53a62800 | 114 | unsigned long flags; |
50078a90 | 115 | int i; |
f5f2cc64 | 116 | |
50078a90 | 117 | dev_dbg(&raw->dev->dev, "timer callback clearing all keys\n"); |
f5f2cc64 | 118 | |
53a62800 | 119 | spin_lock_irqsave(&raw->mce_kbd.keylock, flags); |
f5f2cc64 | 120 | |
53a62800 SY |
121 | if (time_is_before_eq_jiffies(raw->mce_kbd.rx_timeout.expires)) { |
122 | for (i = 0; i < 7; i++) { | |
123 | maskcode = kbd_keycodes[MCIR2_MASK_KEYS_START + i]; | |
158bc148 | 124 | input_report_key(raw->dev->input_dev, maskcode, 0); |
53a62800 | 125 | } |
63039c29 | 126 | |
53a62800 | 127 | for (i = 0; i < MCIR2_MASK_KEYS_START; i++) |
158bc148 SY |
128 | input_report_key(raw->dev->input_dev, kbd_keycodes[i], |
129 | 0); | |
53a62800 | 130 | |
158bc148 | 131 | input_sync(raw->dev->input_dev); |
53a62800 SY |
132 | } |
133 | spin_unlock_irqrestore(&raw->mce_kbd.keylock, flags); | |
f5f2cc64 JW |
134 | } |
135 | ||
136 | static enum mce_kbd_mode mce_kbd_mode(struct mce_kbd_dec *data) | |
137 | { | |
138 | switch (data->header & MCIR2_MODE_MASK) { | |
139 | case MCIR2_KEYBOARD_HEADER: | |
140 | return MCIR2_MODE_KEYBOARD; | |
141 | case MCIR2_MOUSE_HEADER: | |
142 | return MCIR2_MODE_MOUSE; | |
143 | default: | |
144 | return MCIR2_MODE_UNKNOWN; | |
145 | } | |
146 | } | |
147 | ||
50078a90 | 148 | static void ir_mce_kbd_process_keyboard_data(struct rc_dev *dev, u32 scancode) |
f5f2cc64 | 149 | { |
53932760 SY |
150 | u8 keydata1 = (scancode >> 8) & 0xff; |
151 | u8 keydata2 = (scancode >> 16) & 0xff; | |
f5f2cc64 | 152 | u8 shiftmask = scancode & 0xff; |
53932760 | 153 | unsigned char maskcode; |
f5f2cc64 JW |
154 | int i, keystate; |
155 | ||
53932760 SY |
156 | dev_dbg(&dev->dev, "keyboard: keydata2 = 0x%02x, keydata1 = 0x%02x, shiftmask = 0x%02x\n", |
157 | keydata2, keydata1, shiftmask); | |
f5f2cc64 JW |
158 | |
159 | for (i = 0; i < 7; i++) { | |
160 | maskcode = kbd_keycodes[MCIR2_MASK_KEYS_START + i]; | |
161 | if (shiftmask & (1 << i)) | |
162 | keystate = 1; | |
163 | else | |
164 | keystate = 0; | |
158bc148 | 165 | input_report_key(dev->input_dev, maskcode, keystate); |
f5f2cc64 JW |
166 | } |
167 | ||
53932760 | 168 | if (keydata1) |
158bc148 | 169 | input_report_key(dev->input_dev, kbd_keycodes[keydata1], 1); |
53932760 | 170 | if (keydata2) |
158bc148 | 171 | input_report_key(dev->input_dev, kbd_keycodes[keydata2], 1); |
53932760 SY |
172 | |
173 | if (!keydata1 && !keydata2) { | |
f5f2cc64 | 174 | for (i = 0; i < MCIR2_MASK_KEYS_START; i++) |
158bc148 | 175 | input_report_key(dev->input_dev, kbd_keycodes[i], 0); |
f5f2cc64 JW |
176 | } |
177 | } | |
178 | ||
50078a90 | 179 | static void ir_mce_kbd_process_mouse_data(struct rc_dev *dev, u32 scancode) |
f5f2cc64 JW |
180 | { |
181 | /* raw mouse coordinates */ | |
182 | u8 xdata = (scancode >> 7) & 0x7f; | |
183 | u8 ydata = (scancode >> 14) & 0x7f; | |
184 | int x, y; | |
185 | /* mouse buttons */ | |
186 | bool right = scancode & 0x40; | |
187 | bool left = scancode & 0x20; | |
188 | ||
189 | if (xdata & 0x40) | |
190 | x = -((~xdata & 0x7f) + 1); | |
191 | else | |
192 | x = xdata; | |
193 | ||
194 | if (ydata & 0x40) | |
195 | y = -((~ydata & 0x7f) + 1); | |
196 | else | |
197 | y = ydata; | |
198 | ||
50078a90 SY |
199 | dev_dbg(&dev->dev, "mouse: x = %d, y = %d, btns = %s%s\n", |
200 | x, y, left ? "L" : "", right ? "R" : ""); | |
f5f2cc64 | 201 | |
158bc148 SY |
202 | input_report_rel(dev->input_dev, REL_X, x); |
203 | input_report_rel(dev->input_dev, REL_Y, y); | |
f5f2cc64 | 204 | |
158bc148 SY |
205 | input_report_key(dev->input_dev, BTN_LEFT, left); |
206 | input_report_key(dev->input_dev, BTN_RIGHT, right); | |
f5f2cc64 JW |
207 | } |
208 | ||
209 | /** | |
210 | * ir_mce_kbd_decode() - Decode one mce_kbd pulse or space | |
211 | * @dev: the struct rc_dev descriptor of the device | |
212 | * @ev: the struct ir_raw_event descriptor of the pulse/space | |
213 | * | |
214 | * This function returns -EINVAL if the pulse violates the state machine | |
215 | */ | |
216 | static int ir_mce_kbd_decode(struct rc_dev *dev, struct ir_raw_event ev) | |
217 | { | |
218 | struct mce_kbd_dec *data = &dev->raw->mce_kbd; | |
219 | u32 scancode; | |
220 | unsigned long delay; | |
de142c32 | 221 | struct lirc_scancode lsc = {}; |
f5f2cc64 | 222 | |
f5f2cc64 JW |
223 | if (!is_timing_event(ev)) { |
224 | if (ev.reset) | |
225 | data->state = STATE_INACTIVE; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | if (!geq_margin(ev.duration, MCIR2_UNIT, MCIR2_UNIT / 2)) | |
230 | goto out; | |
231 | ||
232 | again: | |
50078a90 SY |
233 | dev_dbg(&dev->dev, "started at state %i (%uus %s)\n", |
234 | data->state, TO_US(ev.duration), TO_STR(ev.pulse)); | |
f5f2cc64 JW |
235 | |
236 | if (!geq_margin(ev.duration, MCIR2_UNIT, MCIR2_UNIT / 2)) | |
237 | return 0; | |
238 | ||
239 | switch (data->state) { | |
240 | ||
241 | case STATE_INACTIVE: | |
242 | if (!ev.pulse) | |
243 | break; | |
244 | ||
245 | /* Note: larger margin on first pulse since each MCIR2_UNIT | |
246 | is quite short and some hardware takes some time to | |
247 | adjust to the signal */ | |
248 | if (!eq_margin(ev.duration, MCIR2_PREFIX_PULSE, MCIR2_UNIT)) | |
249 | break; | |
250 | ||
251 | data->state = STATE_HEADER_BIT_START; | |
252 | data->count = 0; | |
253 | data->header = 0; | |
254 | return 0; | |
255 | ||
256 | case STATE_HEADER_BIT_START: | |
257 | if (geq_margin(ev.duration, MCIR2_MAX_LEN, MCIR2_UNIT / 2)) | |
258 | break; | |
259 | ||
260 | data->header <<= 1; | |
261 | if (ev.pulse) | |
262 | data->header |= 1; | |
263 | data->count++; | |
264 | data->state = STATE_HEADER_BIT_END; | |
265 | return 0; | |
266 | ||
267 | case STATE_HEADER_BIT_END: | |
f5f2cc64 JW |
268 | decrease_duration(&ev, MCIR2_BIT_END); |
269 | ||
270 | if (data->count != MCIR2_HEADER_NBITS) { | |
271 | data->state = STATE_HEADER_BIT_START; | |
272 | goto again; | |
273 | } | |
274 | ||
275 | switch (mce_kbd_mode(data)) { | |
276 | case MCIR2_MODE_KEYBOARD: | |
277 | data->wanted_bits = MCIR2_KEYBOARD_NBITS; | |
278 | break; | |
279 | case MCIR2_MODE_MOUSE: | |
280 | data->wanted_bits = MCIR2_MOUSE_NBITS; | |
281 | break; | |
282 | default: | |
50078a90 | 283 | dev_dbg(&dev->dev, "not keyboard or mouse data\n"); |
f5f2cc64 JW |
284 | goto out; |
285 | } | |
286 | ||
287 | data->count = 0; | |
288 | data->body = 0; | |
289 | data->state = STATE_BODY_BIT_START; | |
290 | goto again; | |
291 | ||
292 | case STATE_BODY_BIT_START: | |
293 | if (geq_margin(ev.duration, MCIR2_MAX_LEN, MCIR2_UNIT / 2)) | |
294 | break; | |
295 | ||
296 | data->body <<= 1; | |
297 | if (ev.pulse) | |
298 | data->body |= 1; | |
299 | data->count++; | |
300 | data->state = STATE_BODY_BIT_END; | |
301 | return 0; | |
302 | ||
303 | case STATE_BODY_BIT_END: | |
f5f2cc64 JW |
304 | if (data->count == data->wanted_bits) |
305 | data->state = STATE_FINISHED; | |
306 | else | |
307 | data->state = STATE_BODY_BIT_START; | |
308 | ||
309 | decrease_duration(&ev, MCIR2_BIT_END); | |
310 | goto again; | |
311 | ||
312 | case STATE_FINISHED: | |
313 | if (ev.pulse) | |
314 | break; | |
315 | ||
316 | switch (data->wanted_bits) { | |
317 | case MCIR2_KEYBOARD_NBITS: | |
53932760 | 318 | scancode = data->body & 0xffffff; |
50078a90 SY |
319 | dev_dbg(&dev->dev, "keyboard data 0x%08x\n", |
320 | data->body); | |
53a62800 | 321 | spin_lock(&data->keylock); |
c421c62a SY |
322 | if (scancode) { |
323 | delay = nsecs_to_jiffies(dev->timeout) + | |
324 | msecs_to_jiffies(100); | |
325 | mod_timer(&data->rx_timeout, jiffies + delay); | |
326 | } else { | |
327 | del_timer(&data->rx_timeout); | |
328 | } | |
f5f2cc64 | 329 | /* Pass data to keyboard buffer parser */ |
50078a90 | 330 | ir_mce_kbd_process_keyboard_data(dev, scancode); |
53a62800 | 331 | spin_unlock(&data->keylock); |
de142c32 | 332 | lsc.rc_proto = RC_PROTO_MCIR2_KBD; |
f5f2cc64 JW |
333 | break; |
334 | case MCIR2_MOUSE_NBITS: | |
335 | scancode = data->body & 0x1fffff; | |
50078a90 | 336 | dev_dbg(&dev->dev, "mouse data 0x%06x\n", scancode); |
f5f2cc64 | 337 | /* Pass data to mouse buffer parser */ |
50078a90 | 338 | ir_mce_kbd_process_mouse_data(dev, scancode); |
de142c32 | 339 | lsc.rc_proto = RC_PROTO_MCIR2_MSE; |
f5f2cc64 JW |
340 | break; |
341 | default: | |
50078a90 | 342 | dev_dbg(&dev->dev, "not keyboard or mouse data\n"); |
f5f2cc64 JW |
343 | goto out; |
344 | } | |
345 | ||
de142c32 SY |
346 | lsc.scancode = scancode; |
347 | ir_lirc_scancode_event(dev, &lsc); | |
f5f2cc64 | 348 | data->state = STATE_INACTIVE; |
158bc148 SY |
349 | input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode); |
350 | input_sync(dev->input_dev); | |
f5f2cc64 JW |
351 | return 0; |
352 | } | |
353 | ||
354 | out: | |
50078a90 SY |
355 | dev_dbg(&dev->dev, "failed at state %i (%uus %s)\n", |
356 | data->state, TO_US(ev.duration), TO_STR(ev.pulse)); | |
f5f2cc64 | 357 | data->state = STATE_INACTIVE; |
f5f2cc64 JW |
358 | return -EINVAL; |
359 | } | |
360 | ||
361 | static int ir_mce_kbd_register(struct rc_dev *dev) | |
362 | { | |
363 | struct mce_kbd_dec *mce_kbd = &dev->raw->mce_kbd; | |
f5f2cc64 | 364 | |
b17ec78a | 365 | timer_setup(&mce_kbd->rx_timeout, mce_kbd_rx_timeout, 0); |
53a62800 | 366 | spin_lock_init(&mce_kbd->keylock); |
f5f2cc64 | 367 | |
f5f2cc64 JW |
368 | return 0; |
369 | } | |
370 | ||
371 | static int ir_mce_kbd_unregister(struct rc_dev *dev) | |
372 | { | |
373 | struct mce_kbd_dec *mce_kbd = &dev->raw->mce_kbd; | |
f5f2cc64 JW |
374 | |
375 | del_timer_sync(&mce_kbd->rx_timeout); | |
f5f2cc64 JW |
376 | |
377 | return 0; | |
378 | } | |
379 | ||
b73bc16d | 380 | static const struct ir_raw_timings_manchester ir_mce_kbd_timings = { |
ddf9c1bb | 381 | .leader_pulse = MCIR2_PREFIX_PULSE, |
b73bc16d SY |
382 | .invert = 1, |
383 | .clock = MCIR2_UNIT, | |
384 | .trailer_space = MCIR2_UNIT * 10, | |
385 | }; | |
386 | ||
387 | /** | |
388 | * ir_mce_kbd_encode() - Encode a scancode as a stream of raw events | |
389 | * | |
390 | * @protocol: protocol to encode | |
391 | * @scancode: scancode to encode | |
392 | * @events: array of raw ir events to write into | |
393 | * @max: maximum size of @events | |
394 | * | |
395 | * Returns: The number of events written. | |
396 | * -ENOBUFS if there isn't enough space in the array to fit the | |
397 | * encoding. In this case all @max events will have been written. | |
398 | */ | |
6d741bfe | 399 | static int ir_mce_kbd_encode(enum rc_proto protocol, u32 scancode, |
b73bc16d SY |
400 | struct ir_raw_event *events, unsigned int max) |
401 | { | |
402 | struct ir_raw_event *e = events; | |
403 | int len, ret; | |
404 | u64 raw; | |
405 | ||
6d741bfe | 406 | if (protocol == RC_PROTO_MCIR2_KBD) { |
b73bc16d SY |
407 | raw = scancode | |
408 | ((u64)MCIR2_KEYBOARD_HEADER << MCIR2_KEYBOARD_NBITS); | |
80008ddb | 409 | len = MCIR2_KEYBOARD_NBITS + MCIR2_HEADER_NBITS; |
b73bc16d SY |
410 | } else { |
411 | raw = scancode | | |
412 | ((u64)MCIR2_MOUSE_HEADER << MCIR2_MOUSE_NBITS); | |
80008ddb | 413 | len = MCIR2_MOUSE_NBITS + MCIR2_HEADER_NBITS; |
b73bc16d SY |
414 | } |
415 | ||
416 | ret = ir_raw_gen_manchester(&e, max, &ir_mce_kbd_timings, len, raw); | |
417 | if (ret < 0) | |
418 | return ret; | |
419 | ||
420 | return e - events; | |
421 | } | |
422 | ||
f5f2cc64 | 423 | static struct ir_raw_handler mce_kbd_handler = { |
6d741bfe | 424 | .protocols = RC_PROTO_BIT_MCIR2_KBD | RC_PROTO_BIT_MCIR2_MSE, |
f5f2cc64 | 425 | .decode = ir_mce_kbd_decode, |
b73bc16d | 426 | .encode = ir_mce_kbd_encode, |
f5f2cc64 JW |
427 | .raw_register = ir_mce_kbd_register, |
428 | .raw_unregister = ir_mce_kbd_unregister, | |
cdfaa01c | 429 | .carrier = 36000, |
a86d6df8 | 430 | .min_timeout = MCIR2_MAX_LEN + MCIR2_UNIT / 2, |
f5f2cc64 JW |
431 | }; |
432 | ||
433 | static int __init ir_mce_kbd_decode_init(void) | |
434 | { | |
435 | ir_raw_handler_register(&mce_kbd_handler); | |
436 | ||
437 | printk(KERN_INFO "IR MCE Keyboard/mouse protocol handler initialized\n"); | |
438 | return 0; | |
439 | } | |
440 | ||
441 | static void __exit ir_mce_kbd_decode_exit(void) | |
442 | { | |
443 | ir_raw_handler_unregister(&mce_kbd_handler); | |
444 | } | |
445 | ||
446 | module_init(ir_mce_kbd_decode_init); | |
447 | module_exit(ir_mce_kbd_decode_exit); | |
448 | ||
449 | MODULE_LICENSE("GPL"); | |
450 | MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>"); | |
451 | MODULE_DESCRIPTION("MCE Keyboard/mouse IR protocol decoder"); |