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review.evervolv.com / android_kernel_lge_hammerhead / 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 / . / drivers / media / common / ir-common.c
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Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame^]1/*
2 * $Id: ir-common.c,v 1.8 2005/02/22 12:28:40 kraxel Exp $
3 *
4 * some common structs and functions to handle infrared remotes via
5 * input layer ...
6 *
7 * (c) 2003 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <media/ir-common.h>
27
28/* -------------------------------------------------------------------------- */
29
30MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
31MODULE_LICENSE("GPL");
32
33static int repeat = 1;
34module_param(repeat, int, 0444);
35MODULE_PARM_DESC(repeat,"auto-repeat for IR keys (default: on)");
36
37static int debug = 0; /* debug level (0,1,2) */
38module_param(debug, int, 0644);
39
40#define dprintk(level, fmt, arg...) if (debug >= level) \
41 printk(KERN_DEBUG fmt , ## arg)
42
43/* -------------------------------------------------------------------------- */
44
45/* generic RC5 keytable */
46/* see http://users.pandora.be/nenya/electronics/rc5/codes00.htm */
47/* used by old (black) Hauppauge remotes */
48IR_KEYTAB_TYPE ir_codes_rc5_tv[IR_KEYTAB_SIZE] = {
49 [ 0x00 ] = KEY_KP0, // 0
50 [ 0x01 ] = KEY_KP1, // 1
51 [ 0x02 ] = KEY_KP2, // 2
52 [ 0x03 ] = KEY_KP3, // 3
53 [ 0x04 ] = KEY_KP4, // 4
54 [ 0x05 ] = KEY_KP5, // 5
55 [ 0x06 ] = KEY_KP6, // 6
56 [ 0x07 ] = KEY_KP7, // 7
57 [ 0x08 ] = KEY_KP8, // 8
58 [ 0x09 ] = KEY_KP9, // 9
59
60 [ 0x0b ] = KEY_CHANNEL, // channel / program (japan: 11)
61 [ 0x0c ] = KEY_POWER, // standby
62 [ 0x0d ] = KEY_MUTE, // mute / demute
63 [ 0x0f ] = KEY_TV, // display
64 [ 0x10 ] = KEY_VOLUMEUP, // volume +
65 [ 0x11 ] = KEY_VOLUMEDOWN, // volume -
66 [ 0x12 ] = KEY_BRIGHTNESSUP, // brightness +
67 [ 0x13 ] = KEY_BRIGHTNESSDOWN, // brightness -
68 [ 0x1e ] = KEY_SEARCH, // search +
69 [ 0x20 ] = KEY_CHANNELUP, // channel / program +
70 [ 0x21 ] = KEY_CHANNELDOWN, // channel / program -
71 [ 0x22 ] = KEY_CHANNEL, // alt / channel
72 [ 0x23 ] = KEY_LANGUAGE, // 1st / 2nd language
73 [ 0x26 ] = KEY_SLEEP, // sleeptimer
74 [ 0x2e ] = KEY_MENU, // 2nd controls (USA: menu)
75 [ 0x30 ] = KEY_PAUSE, // pause
76 [ 0x32 ] = KEY_REWIND, // rewind
77 [ 0x33 ] = KEY_GOTO, // go to
78 [ 0x35 ] = KEY_PLAY, // play
79 [ 0x36 ] = KEY_STOP, // stop
80 [ 0x37 ] = KEY_RECORD, // recording
81 [ 0x3c ] = KEY_TEXT, // teletext submode (Japan: 12)
82 [ 0x3d ] = KEY_SUSPEND, // system standby
83
84#if 0 /* FIXME */
85 [ 0x0a ] = KEY_RESERVED, // 1/2/3 digits (japan: 10)
86 [ 0x0e ] = KEY_RESERVED, // P.P. (personal preference)
87 [ 0x14 ] = KEY_RESERVED, // colour saturation +
88 [ 0x15 ] = KEY_RESERVED, // colour saturation -
89 [ 0x16 ] = KEY_RESERVED, // bass +
90 [ 0x17 ] = KEY_RESERVED, // bass -
91 [ 0x18 ] = KEY_RESERVED, // treble +
92 [ 0x19 ] = KEY_RESERVED, // treble -
93 [ 0x1a ] = KEY_RESERVED, // balance right
94 [ 0x1b ] = KEY_RESERVED, // balance left
95 [ 0x1c ] = KEY_RESERVED, // contrast +
96 [ 0x1d ] = KEY_RESERVED, // contrast -
97 [ 0x1f ] = KEY_RESERVED, // tint/hue +
98 [ 0x24 ] = KEY_RESERVED, // spacial stereo on/off
99 [ 0x25 ] = KEY_RESERVED, // mono / stereo (USA)
100 [ 0x27 ] = KEY_RESERVED, // tint / hue -
101 [ 0x28 ] = KEY_RESERVED, // RF switch/PIP select
102 [ 0x29 ] = KEY_RESERVED, // vote
103 [ 0x2a ] = KEY_RESERVED, // timed page/channel clck
104 [ 0x2b ] = KEY_RESERVED, // increment (USA)
105 [ 0x2c ] = KEY_RESERVED, // decrement (USA)
106 [ 0x2d ] = KEY_RESERVED, //
107 [ 0x2f ] = KEY_RESERVED, // PIP shift
108 [ 0x31 ] = KEY_RESERVED, // erase
109 [ 0x34 ] = KEY_RESERVED, // wind
110 [ 0x38 ] = KEY_RESERVED, // external 1
111 [ 0x39 ] = KEY_RESERVED, // external 2
112 [ 0x3a ] = KEY_RESERVED, // PIP display mode
113 [ 0x3b ] = KEY_RESERVED, // view data mode / advance
114 [ 0x3e ] = KEY_RESERVED, // crispener on/off
115 [ 0x3f ] = KEY_RESERVED, // system select
116#endif
117};
118EXPORT_SYMBOL_GPL(ir_codes_rc5_tv);
119
120/* Table for Leadtek Winfast Remote Controls - used by both bttv and cx88 */
121IR_KEYTAB_TYPE ir_codes_winfast[IR_KEYTAB_SIZE] = {
122 [ 5 ] = KEY_KP1,
123 [ 6 ] = KEY_KP2,
124 [ 7 ] = KEY_KP3,
125 [ 9 ] = KEY_KP4,
126 [ 10 ] = KEY_KP5,
127 [ 11 ] = KEY_KP6,
128 [ 13 ] = KEY_KP7,
129 [ 14 ] = KEY_KP8,
130 [ 15 ] = KEY_KP9,
131 [ 18 ] = KEY_KP0,
132
133 [ 0 ] = KEY_POWER,
134// [ 27 ] = MTS button
135 [ 2 ] = KEY_TUNER, // TV/FM
136 [ 30 ] = KEY_VIDEO,
137// [ 22 ] = display button
138 [ 4 ] = KEY_VOLUMEUP,
139 [ 8 ] = KEY_VOLUMEDOWN,
140 [ 12 ] = KEY_CHANNELUP,
141 [ 16 ] = KEY_CHANNELDOWN,
142 [ 3 ] = KEY_ZOOM, // fullscreen
143 [ 31 ] = KEY_SUBTITLE, // closed caption/teletext
144 [ 32 ] = KEY_SLEEP,
145// [ 41 ] = boss key
146 [ 20 ] = KEY_MUTE,
147 [ 43 ] = KEY_RED,
148 [ 44 ] = KEY_GREEN,
149 [ 45 ] = KEY_YELLOW,
150 [ 46 ] = KEY_BLUE,
151 [ 24 ] = KEY_KPPLUS, //fine tune +
152 [ 25 ] = KEY_KPMINUS, //fine tune -
153// [ 42 ] = picture in picture
154 [ 33 ] = KEY_KPDOT,
155 [ 19 ] = KEY_KPENTER,
156// [ 17 ] = recall
157 [ 34 ] = KEY_BACK,
158 [ 35 ] = KEY_PLAYPAUSE,
159 [ 36 ] = KEY_NEXT,
160// [ 37 ] = time shifting
161 [ 38 ] = KEY_STOP,
162 [ 39 ] = KEY_RECORD
163// [ 40 ] = snapshot
164};
165EXPORT_SYMBOL_GPL(ir_codes_winfast);
166
167/* empty keytable, can be used as placeholder for not-yet created keytables */
168IR_KEYTAB_TYPE ir_codes_empty[IR_KEYTAB_SIZE] = {
169 [ 42 ] = KEY_COFFEE,
170};
171EXPORT_SYMBOL_GPL(ir_codes_empty);
172
173/* Hauppauge: the newer, gray remotes (seems there are multiple
174 * slightly different versions), shipped with cx88+ivtv cards.
175 * almost rc5 coding, but some non-standard keys */
176IR_KEYTAB_TYPE ir_codes_hauppauge_new[IR_KEYTAB_SIZE] = {
177 [ 0x00 ] = KEY_KP0, // 0
178 [ 0x01 ] = KEY_KP1, // 1
179 [ 0x02 ] = KEY_KP2, // 2
180 [ 0x03 ] = KEY_KP3, // 3
181 [ 0x04 ] = KEY_KP4, // 4
182 [ 0x05 ] = KEY_KP5, // 5
183 [ 0x06 ] = KEY_KP6, // 6
184 [ 0x07 ] = KEY_KP7, // 7
185 [ 0x08 ] = KEY_KP8, // 8
186 [ 0x09 ] = KEY_KP9, // 9
187 [ 0x0b ] = KEY_RED, // red button
188 [ 0x0c ] = KEY_OPTION, // black key without text
189 [ 0x0d ] = KEY_MENU, // menu
190 [ 0x0f ] = KEY_MUTE, // mute
191 [ 0x10 ] = KEY_VOLUMEUP, // volume +
192 [ 0x11 ] = KEY_VOLUMEDOWN, // volume -
193 [ 0x1e ] = KEY_NEXT, // skip >|
194 [ 0x1f ] = KEY_EXIT, // back/exit
195 [ 0x20 ] = KEY_CHANNELUP, // channel / program +
196 [ 0x21 ] = KEY_CHANNELDOWN, // channel / program -
197 [ 0x22 ] = KEY_CHANNEL, // source (old black remote)
198 [ 0x24 ] = KEY_PREVIOUS, // replay |<
199 [ 0x25 ] = KEY_ENTER, // OK
200 [ 0x26 ] = KEY_SLEEP, // minimize (old black remote)
201 [ 0x29 ] = KEY_BLUE, // blue key
202 [ 0x2e ] = KEY_GREEN, // green button
203 [ 0x30 ] = KEY_PAUSE, // pause
204 [ 0x32 ] = KEY_REWIND, // backward <<
205 [ 0x34 ] = KEY_FASTFORWARD, // forward >>
206 [ 0x35 ] = KEY_PLAY, // play
207 [ 0x36 ] = KEY_STOP, // stop
208 [ 0x37 ] = KEY_RECORD, // recording
209 [ 0x38 ] = KEY_YELLOW, // yellow key
210 [ 0x3b ] = KEY_SELECT, // top right button
211 [ 0x3c ] = KEY_ZOOM, // full
212 [ 0x3d ] = KEY_POWER, // system power (green button)
213};
214EXPORT_SYMBOL(ir_codes_hauppauge_new);
215
216/* -------------------------------------------------------------------------- */
217
218static void ir_input_key_event(struct input_dev *dev, struct ir_input_state *ir)
219{
220 if (KEY_RESERVED == ir->keycode) {
221 printk(KERN_INFO "%s: unknown key: key=0x%02x raw=0x%02x down=%d\n",
222 dev->name,ir->ir_key,ir->ir_raw,ir->keypressed);
223 return;
224 }
225 dprintk(1,"%s: key event code=%d down=%d\n",
226 dev->name,ir->keycode,ir->keypressed);
227 input_report_key(dev,ir->keycode,ir->keypressed);
228 input_sync(dev);
229}
230
231/* -------------------------------------------------------------------------- */
232
233void ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
234 int ir_type, IR_KEYTAB_TYPE *ir_codes)
235{
236 int i;
237
238 ir->ir_type = ir_type;
239 if (ir_codes)
240 memcpy(ir->ir_codes, ir_codes, sizeof(ir->ir_codes));
241
242 init_input_dev(dev);
243 dev->keycode = ir->ir_codes;
244 dev->keycodesize = sizeof(IR_KEYTAB_TYPE);
245 dev->keycodemax = IR_KEYTAB_SIZE;
246 for (i = 0; i < IR_KEYTAB_SIZE; i++)
247 set_bit(ir->ir_codes[i], dev->keybit);
248 clear_bit(0, dev->keybit);
249
250 set_bit(EV_KEY, dev->evbit);
251 if (repeat)
252 set_bit(EV_REP, dev->evbit);
253}
254
255void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir)
256{
257 if (ir->keypressed) {
258 ir->keypressed = 0;
259 ir_input_key_event(dev,ir);
260 }
261}
262
263void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
264 u32 ir_key, u32 ir_raw)
265{
266 u32 keycode = IR_KEYCODE(ir->ir_codes, ir_key);
267
268 if (ir->keypressed && ir->keycode != keycode) {
269 ir->keypressed = 0;
270 ir_input_key_event(dev,ir);
271 }
272 if (!ir->keypressed) {
273 ir->ir_key = ir_key;
274 ir->ir_raw = ir_raw;
275 ir->keycode = keycode;
276 ir->keypressed = 1;
277 ir_input_key_event(dev,ir);
278 }
279#if 0
280 /* maybe do something like this ??? */
281 input_event(a, EV_IR, ir->ir_type, ir->ir_raw);
282#endif
283}
284
285/* -------------------------------------------------------------------------- */
286
287u32 ir_extract_bits(u32 data, u32 mask)
288{
289 int mbit, vbit;
290 u32 value;
291
292 value = 0;
293 vbit = 0;
294 for (mbit = 0; mbit < 32; mbit++) {
295 if (!(mask & ((u32)1 << mbit)))
296 continue;
297 if (data & ((u32)1 << mbit))
298 value |= (1 << vbit);
299 vbit++;
300 }
301 return value;
302}
303
304static int inline getbit(u32 *samples, int bit)
305{
306 return (samples[bit/32] & (1 << (31-(bit%32)))) ? 1 : 0;
307}
308
309/* sump raw samples for visual debugging ;) */
310int ir_dump_samples(u32 *samples, int count)
311{
312 int i, bit, start;
313
314 printk(KERN_DEBUG "ir samples: ");
315 start = 0;
316 for (i = 0; i < count * 32; i++) {
317 bit = getbit(samples,i);
318 if (bit)
319 start = 1;
320 if (0 == start)
321 continue;
322 printk("%s", bit ? "#" : "_");
323 }
324 printk("\n");
325 return 0;
326}
327
328/* decode raw samples, biphase coding, used by rc5 for example */
329int ir_decode_biphase(u32 *samples, int count, int low, int high)
330{
331 int i,last,bit,len,flips;
332 u32 value;
333
334 /* find start bit (1) */
335 for (i = 0; i < 32; i++) {
336 bit = getbit(samples,i);
337 if (bit)
338 break;
339 }
340
341 /* go decoding */
342 len = 0;
343 flips = 0;
344 value = 1;
345 for (; i < count * 32; i++) {
346 if (len > high)
347 break;
348 if (flips > 1)
349 break;
350 last = bit;
351 bit = getbit(samples,i);
352 if (last == bit) {
353 len++;
354 continue;
355 }
356 if (len < low) {
357 len++;
358 flips++;
359 continue;
360 }
361 value <<= 1;
362 value |= bit;
363 flips = 0;
364 len = 1;
365 }
366 return value;
367}
368
369EXPORT_SYMBOL_GPL(ir_input_init);
370EXPORT_SYMBOL_GPL(ir_input_nokey);
371EXPORT_SYMBOL_GPL(ir_input_keydown);
372
373EXPORT_SYMBOL_GPL(ir_extract_bits);
374EXPORT_SYMBOL_GPL(ir_dump_samples);
375EXPORT_SYMBOL_GPL(ir_decode_biphase);
376
377/*
378 * Local variables:
379 * c-basic-offset: 8
380 * End:
381 */