3 * some common structs and functions to handle infrared remotes via
6 * (c) 2003 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <media/ir-common.h>
27 /* -------------------------------------------------------------------------- */
29 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
30 MODULE_LICENSE("GPL");
32 static int repeat = 1;
33 module_param(repeat, int, 0444);
34 MODULE_PARM_DESC(repeat,"auto-repeat for IR keys (default: on)");
36 static int debug = 0; /* debug level (0,1,2) */
37 module_param(debug, int, 0644);
39 #define dprintk(level, fmt, arg...) if (debug >= level) \
40 printk(KERN_DEBUG fmt , ## arg)
42 /* -------------------------------------------------------------------------- */
44 /* generic RC5 keytable */
45 /* see http://users.pandora.be/nenya/electronics/rc5/codes00.htm */
46 /* used by old (black) Hauppauge remotes */
47 IR_KEYTAB_TYPE ir_codes_rc5_tv[IR_KEYTAB_SIZE] = {
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,
65 [ 0x11 ] = KEY_VOLUMEDOWN,
66 [ 0x12 ] = KEY_BRIGHTNESSUP,
67 [ 0x13 ] = KEY_BRIGHTNESSDOWN,
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) */
76 [ 0x32 ] = KEY_REWIND,
80 [ 0x37 ] = KEY_RECORD, /* recording */
81 [ 0x3c ] = KEY_TEXT, /* teletext submode (Japan: 12) */
82 [ 0x3d ] = KEY_SUSPEND, /* system standby */
85 EXPORT_SYMBOL_GPL(ir_codes_rc5_tv);
87 /* Table for Leadtek Winfast Remote Controls - used by both bttv and cx88 */
88 IR_KEYTAB_TYPE ir_codes_winfast[IR_KEYTAB_SIZE] = {
102 [ 2 ] = KEY_TUNER, /* TV/FM */
104 [ 4 ] = KEY_VOLUMEUP,
105 [ 8 ] = KEY_VOLUMEDOWN,
106 [ 12 ] = KEY_CHANNELUP,
107 [ 16 ] = KEY_CHANNELDOWN,
108 [ 3 ] = KEY_ZOOM, /* fullscreen */
109 [ 31 ] = KEY_SUBTITLE, /* closed caption/teletext */
116 [ 24 ] = KEY_KPPLUS, /* fine tune + */
117 [ 25 ] = KEY_KPMINUS, /* fine tune - */
119 [ 19 ] = KEY_KPENTER,
121 [ 35 ] = KEY_PLAYPAUSE,
126 EXPORT_SYMBOL_GPL(ir_codes_winfast);
128 /* empty keytable, can be used as placeholder for not-yet created keytables */
129 IR_KEYTAB_TYPE ir_codes_empty[IR_KEYTAB_SIZE] = {
132 EXPORT_SYMBOL_GPL(ir_codes_empty);
134 /* Hauppauge: the newer, gray remotes (seems there are multiple
135 * slightly different versions), shipped with cx88+ivtv cards.
136 * almost rc5 coding, but some non-standard keys */
137 IR_KEYTAB_TYPE ir_codes_hauppauge_new[IR_KEYTAB_SIZE] = {
150 [ 0x0a ] = KEY_TEXT, /* keypad asterisk as well */
151 [ 0x0b ] = KEY_RED, /* red button */
152 [ 0x0c ] = KEY_RADIO,
154 [ 0x0e ] = KEY_SUBTITLE, /* also the # key */
156 [ 0x10 ] = KEY_VOLUMEUP,
157 [ 0x11 ] = KEY_VOLUMEDOWN,
158 [ 0x12 ] = KEY_PREVIOUS, /* previous channel */
162 [ 0x17 ] = KEY_RIGHT,
163 [ 0x18 ] = KEY_VIDEO, /* Videos */
164 [ 0x19 ] = KEY_AUDIO, /* Music */
165 /* 0x1a: Pictures - presume this means
166 "Multimedia Home Platform" -
167 no "PICTURES" key in input.h
171 [ 0x1b ] = KEY_EPG, /* Guide */
173 [ 0x1e ] = KEY_NEXTSONG, /* skip >| */
174 [ 0x1f ] = KEY_EXIT, /* back/exit */
175 [ 0x20 ] = KEY_CHANNELUP, /* channel / program + */
176 [ 0x21 ] = KEY_CHANNELDOWN, /* channel / program - */
177 [ 0x22 ] = KEY_CHANNEL, /* source (old black remote) */
178 [ 0x24 ] = KEY_PREVIOUSSONG, /* replay |< */
179 [ 0x25 ] = KEY_ENTER, /* OK */
180 [ 0x26 ] = KEY_SLEEP, /* minimize (old black remote) */
181 [ 0x29 ] = KEY_BLUE, /* blue key */
182 [ 0x2e ] = KEY_GREEN, /* green button */
183 [ 0x30 ] = KEY_PAUSE, /* pause */
184 [ 0x32 ] = KEY_REWIND, /* backward << */
185 [ 0x34 ] = KEY_FASTFORWARD, /* forward >> */
188 [ 0x37 ] = KEY_RECORD, /* recording */
189 [ 0x38 ] = KEY_YELLOW, /* yellow key */
190 [ 0x3b ] = KEY_SELECT, /* top right button */
191 [ 0x3c ] = KEY_ZOOM, /* full */
192 [ 0x3d ] = KEY_POWER, /* system power (green button) */
194 EXPORT_SYMBOL(ir_codes_hauppauge_new);
196 IR_KEYTAB_TYPE ir_codes_pixelview[IR_KEYTAB_SIZE] = {
208 [ 3 ] = KEY_TUNER, /* TV/FM */
209 [ 7 ] = KEY_SEARCH, /* scan */
210 [ 28 ] = KEY_ZOOM, /* full screen */
212 [ 23 ] = KEY_VOLUMEDOWN,
213 [ 31 ] = KEY_VOLUMEUP,
214 [ 20 ] = KEY_CHANNELDOWN,
215 [ 22 ] = KEY_CHANNELUP,
218 [ 0 ] = KEY_LIST, /* source */
219 [ 19 ] = KEY_INFO, /* loop */
220 [ 16 ] = KEY_LAST, /* +100 */
221 [ 13 ] = KEY_CLEAR, /* reset */
222 [ 12 ] = BTN_RIGHT, /* fun++ */
223 [ 4 ] = BTN_LEFT, /* fun-- */
224 [ 14 ] = KEY_GOTO, /* function */
225 [ 15 ] = KEY_STOP, /* freeze */
227 EXPORT_SYMBOL(ir_codes_pixelview);
229 /* -------------------------------------------------------------------------- */
231 static void ir_input_key_event(struct input_dev *dev, struct ir_input_state *ir)
233 if (KEY_RESERVED == ir->keycode) {
234 printk(KERN_INFO "%s: unknown key: key=0x%02x raw=0x%02x down=%d\n",
235 dev->name,ir->ir_key,ir->ir_raw,ir->keypressed);
238 dprintk(1,"%s: key event code=%d down=%d\n",
239 dev->name,ir->keycode,ir->keypressed);
240 input_report_key(dev,ir->keycode,ir->keypressed);
244 /* -------------------------------------------------------------------------- */
246 void ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
247 int ir_type, IR_KEYTAB_TYPE *ir_codes)
251 ir->ir_type = ir_type;
253 memcpy(ir->ir_codes, ir_codes, sizeof(ir->ir_codes));
255 dev->keycode = ir->ir_codes;
256 dev->keycodesize = sizeof(IR_KEYTAB_TYPE);
257 dev->keycodemax = IR_KEYTAB_SIZE;
258 for (i = 0; i < IR_KEYTAB_SIZE; i++)
259 set_bit(ir->ir_codes[i], dev->keybit);
260 clear_bit(0, dev->keybit);
262 set_bit(EV_KEY, dev->evbit);
264 set_bit(EV_REP, dev->evbit);
267 void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir)
269 if (ir->keypressed) {
271 ir_input_key_event(dev,ir);
275 void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
276 u32 ir_key, u32 ir_raw)
278 u32 keycode = IR_KEYCODE(ir->ir_codes, ir_key);
280 if (ir->keypressed && ir->keycode != keycode) {
282 ir_input_key_event(dev,ir);
284 if (!ir->keypressed) {
287 ir->keycode = keycode;
289 ir_input_key_event(dev,ir);
293 /* -------------------------------------------------------------------------- */
295 u32 ir_extract_bits(u32 data, u32 mask)
302 for (mbit = 0; mbit < 32; mbit++) {
303 if (!(mask & ((u32)1 << mbit)))
305 if (data & ((u32)1 << mbit))
306 value |= (1 << vbit);
312 static int inline getbit(u32 *samples, int bit)
314 return (samples[bit/32] & (1 << (31-(bit%32)))) ? 1 : 0;
317 /* sump raw samples for visual debugging ;) */
318 int ir_dump_samples(u32 *samples, int count)
322 printk(KERN_DEBUG "ir samples: ");
324 for (i = 0; i < count * 32; i++) {
325 bit = getbit(samples,i);
330 printk("%s", bit ? "#" : "_");
336 /* decode raw samples, pulse distance coding used by NEC remotes */
337 int ir_decode_pulsedistance(u32 *samples, int count, int low, int high)
343 /* find start burst */
344 for (i = len = 0; i < count * 32; i++) {
345 bit = getbit(samples,i);
355 /* start burst to short */
359 /* find start silence */
360 for (len = 0; i < count * 32; i++) {
361 bit = getbit(samples,i);
369 /* silence to short */
376 value = 0; curBit = 1;
377 for (; i < count * 32; i++) {
378 bit = getbit(samples,i);
387 if (len > (low + high) /2)
402 /* decode raw samples, biphase coding, used by rc5 for example */
403 int ir_decode_biphase(u32 *samples, int count, int low, int high)
405 int i,last,bit,len,flips;
408 /* find start bit (1) */
409 for (i = 0; i < 32; i++) {
410 bit = getbit(samples,i);
419 for (; i < count * 32; i++) {
425 bit = getbit(samples,i);
443 EXPORT_SYMBOL_GPL(ir_input_init);
444 EXPORT_SYMBOL_GPL(ir_input_nokey);
445 EXPORT_SYMBOL_GPL(ir_input_keydown);
447 EXPORT_SYMBOL_GPL(ir_extract_bits);
448 EXPORT_SYMBOL_GPL(ir_dump_samples);
449 EXPORT_SYMBOL_GPL(ir_decode_biphase);
450 EXPORT_SYMBOL_GPL(ir_decode_pulsedistance);