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 <linux/string.h>
26 #include <media/ir-common.h>
28 /* -------------------------------------------------------------------------- */
30 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
31 MODULE_LICENSE("GPL");
33 static int repeat = 1;
34 module_param(repeat, int, 0444);
35 MODULE_PARM_DESC(repeat,"auto-repeat for IR keys (default: on)");
37 static int debug = 0; /* debug level (0,1,2) */
38 module_param(debug, int, 0644);
40 #define dprintk(level, fmt, arg...) if (debug >= level) \
41 printk(KERN_DEBUG fmt , ## arg)
43 /* -------------------------------------------------------------------------- */
45 /* generic RC5 keytable */
46 /* see http://users.pandora.be/nenya/electronics/rc5/codes00.htm */
47 /* used by old (black) Hauppauge remotes */
48 IR_KEYTAB_TYPE ir_codes_rc5_tv[IR_KEYTAB_SIZE] = {
61 [ 0x0b ] = KEY_CHANNEL, /* channel / program (japan: 11) */
62 [ 0x0c ] = KEY_POWER, /* standby */
63 [ 0x0d ] = KEY_MUTE, /* mute / demute */
64 [ 0x0f ] = KEY_TV, /* display */
65 [ 0x10 ] = KEY_VOLUMEUP,
66 [ 0x11 ] = KEY_VOLUMEDOWN,
67 [ 0x12 ] = KEY_BRIGHTNESSUP,
68 [ 0x13 ] = KEY_BRIGHTNESSDOWN,
69 [ 0x1e ] = KEY_SEARCH, /* search + */
70 [ 0x20 ] = KEY_CHANNELUP, /* channel / program + */
71 [ 0x21 ] = KEY_CHANNELDOWN, /* channel / program - */
72 [ 0x22 ] = KEY_CHANNEL, /* alt / channel */
73 [ 0x23 ] = KEY_LANGUAGE, /* 1st / 2nd language */
74 [ 0x26 ] = KEY_SLEEP, /* sleeptimer */
75 [ 0x2e ] = KEY_MENU, /* 2nd controls (USA: menu) */
77 [ 0x32 ] = KEY_REWIND,
81 [ 0x37 ] = KEY_RECORD, /* recording */
82 [ 0x3c ] = KEY_TEXT, /* teletext submode (Japan: 12) */
83 [ 0x3d ] = KEY_SUSPEND, /* system standby */
86 EXPORT_SYMBOL_GPL(ir_codes_rc5_tv);
88 /* Table for Leadtek Winfast Remote Controls - used by both bttv and cx88 */
89 IR_KEYTAB_TYPE ir_codes_winfast[IR_KEYTAB_SIZE] = {
103 [ 2 ] = KEY_TUNER, /* TV/FM */
105 [ 4 ] = KEY_VOLUMEUP,
106 [ 8 ] = KEY_VOLUMEDOWN,
107 [ 12 ] = KEY_CHANNELUP,
108 [ 16 ] = KEY_CHANNELDOWN,
109 [ 3 ] = KEY_ZOOM, /* fullscreen */
110 [ 31 ] = KEY_SUBTITLE, /* closed caption/teletext */
117 [ 24 ] = KEY_KPPLUS, /* fine tune + */
118 [ 25 ] = KEY_KPMINUS, /* fine tune - */
120 [ 19 ] = KEY_KPENTER,
122 [ 35 ] = KEY_PLAYPAUSE,
127 EXPORT_SYMBOL_GPL(ir_codes_winfast);
129 /* empty keytable, can be used as placeholder for not-yet created keytables */
130 IR_KEYTAB_TYPE ir_codes_empty[IR_KEYTAB_SIZE] = {
133 EXPORT_SYMBOL_GPL(ir_codes_empty);
135 /* Hauppauge: the newer, gray remotes (seems there are multiple
136 * slightly different versions), shipped with cx88+ivtv cards.
137 * almost rc5 coding, but some non-standard keys */
138 IR_KEYTAB_TYPE ir_codes_hauppauge_new[IR_KEYTAB_SIZE] = {
151 [ 0x0a ] = KEY_TEXT, /* keypad asterisk as well */
152 [ 0x0b ] = KEY_RED, /* red button */
153 [ 0x0c ] = KEY_RADIO,
155 [ 0x0e ] = KEY_SUBTITLE, /* also the # key */
157 [ 0x10 ] = KEY_VOLUMEUP,
158 [ 0x11 ] = KEY_VOLUMEDOWN,
159 [ 0x12 ] = KEY_PREVIOUS, /* previous channel */
163 [ 0x17 ] = KEY_RIGHT,
164 [ 0x18 ] = KEY_VIDEO, /* Videos */
165 [ 0x19 ] = KEY_AUDIO, /* Music */
166 /* 0x1a: Pictures - presume this means
167 "Multimedia Home Platform" -
168 no "PICTURES" key in input.h
172 [ 0x1b ] = KEY_EPG, /* Guide */
174 [ 0x1e ] = KEY_NEXTSONG, /* skip >| */
175 [ 0x1f ] = KEY_EXIT, /* back/exit */
176 [ 0x20 ] = KEY_CHANNELUP, /* channel / program + */
177 [ 0x21 ] = KEY_CHANNELDOWN, /* channel / program - */
178 [ 0x22 ] = KEY_CHANNEL, /* source (old black remote) */
179 [ 0x24 ] = KEY_PREVIOUSSONG, /* replay |< */
180 [ 0x25 ] = KEY_ENTER, /* OK */
181 [ 0x26 ] = KEY_SLEEP, /* minimize (old black remote) */
182 [ 0x29 ] = KEY_BLUE, /* blue key */
183 [ 0x2e ] = KEY_GREEN, /* green button */
184 [ 0x30 ] = KEY_PAUSE, /* pause */
185 [ 0x32 ] = KEY_REWIND, /* backward << */
186 [ 0x34 ] = KEY_FASTFORWARD, /* forward >> */
189 [ 0x37 ] = KEY_RECORD, /* recording */
190 [ 0x38 ] = KEY_YELLOW, /* yellow key */
191 [ 0x3b ] = KEY_SELECT, /* top right button */
192 [ 0x3c ] = KEY_ZOOM, /* full */
193 [ 0x3d ] = KEY_POWER, /* system power (green button) */
195 EXPORT_SYMBOL(ir_codes_hauppauge_new);
197 IR_KEYTAB_TYPE ir_codes_pixelview[IR_KEYTAB_SIZE] = {
209 [ 3 ] = KEY_TUNER, /* TV/FM */
210 [ 7 ] = KEY_SEARCH, /* scan */
211 [ 28 ] = KEY_ZOOM, /* full screen */
213 [ 23 ] = KEY_VOLUMEDOWN,
214 [ 31 ] = KEY_VOLUMEUP,
215 [ 20 ] = KEY_CHANNELDOWN,
216 [ 22 ] = KEY_CHANNELUP,
219 [ 0 ] = KEY_LIST, /* source */
220 [ 19 ] = KEY_INFO, /* loop */
221 [ 16 ] = KEY_LAST, /* +100 */
222 [ 13 ] = KEY_CLEAR, /* reset */
223 [ 12 ] = BTN_RIGHT, /* fun++ */
224 [ 4 ] = BTN_LEFT, /* fun-- */
225 [ 14 ] = KEY_GOTO, /* function */
226 [ 15 ] = KEY_STOP, /* freeze */
228 EXPORT_SYMBOL(ir_codes_pixelview);
230 /* -------------------------------------------------------------------------- */
232 static void ir_input_key_event(struct input_dev *dev, struct ir_input_state *ir)
234 if (KEY_RESERVED == ir->keycode) {
235 printk(KERN_INFO "%s: unknown key: key=0x%02x raw=0x%02x down=%d\n",
236 dev->name,ir->ir_key,ir->ir_raw,ir->keypressed);
239 dprintk(1,"%s: key event code=%d down=%d\n",
240 dev->name,ir->keycode,ir->keypressed);
241 input_report_key(dev,ir->keycode,ir->keypressed);
245 /* -------------------------------------------------------------------------- */
247 void ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
248 int ir_type, IR_KEYTAB_TYPE *ir_codes)
252 ir->ir_type = ir_type;
254 memcpy(ir->ir_codes, ir_codes, sizeof(ir->ir_codes));
256 dev->keycode = ir->ir_codes;
257 dev->keycodesize = sizeof(IR_KEYTAB_TYPE);
258 dev->keycodemax = IR_KEYTAB_SIZE;
259 for (i = 0; i < IR_KEYTAB_SIZE; i++)
260 set_bit(ir->ir_codes[i], dev->keybit);
261 clear_bit(0, dev->keybit);
263 set_bit(EV_KEY, dev->evbit);
265 set_bit(EV_REP, dev->evbit);
268 void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir)
270 if (ir->keypressed) {
272 ir_input_key_event(dev,ir);
276 void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
277 u32 ir_key, u32 ir_raw)
279 u32 keycode = IR_KEYCODE(ir->ir_codes, ir_key);
281 if (ir->keypressed && ir->keycode != keycode) {
283 ir_input_key_event(dev,ir);
285 if (!ir->keypressed) {
288 ir->keycode = keycode;
290 ir_input_key_event(dev,ir);
294 /* -------------------------------------------------------------------------- */
296 u32 ir_extract_bits(u32 data, u32 mask)
303 for (mbit = 0; mbit < 32; mbit++) {
304 if (!(mask & ((u32)1 << mbit)))
306 if (data & ((u32)1 << mbit))
307 value |= (1 << vbit);
313 static int inline getbit(u32 *samples, int bit)
315 return (samples[bit/32] & (1 << (31-(bit%32)))) ? 1 : 0;
318 /* sump raw samples for visual debugging ;) */
319 int ir_dump_samples(u32 *samples, int count)
323 printk(KERN_DEBUG "ir samples: ");
325 for (i = 0; i < count * 32; i++) {
326 bit = getbit(samples,i);
331 printk("%s", bit ? "#" : "_");
337 /* decode raw samples, pulse distance coding used by NEC remotes */
338 int ir_decode_pulsedistance(u32 *samples, int count, int low, int high)
344 /* find start burst */
345 for (i = len = 0; i < count * 32; i++) {
346 bit = getbit(samples,i);
356 /* start burst to short */
360 /* find start silence */
361 for (len = 0; i < count * 32; i++) {
362 bit = getbit(samples,i);
370 /* silence to short */
377 value = 0; curBit = 1;
378 for (; i < count * 32; i++) {
379 bit = getbit(samples,i);
388 if (len > (low + high) /2)
403 /* decode raw samples, biphase coding, used by rc5 for example */
404 int ir_decode_biphase(u32 *samples, int count, int low, int high)
406 int i,last,bit,len,flips;
409 /* find start bit (1) */
410 for (i = 0; i < 32; i++) {
411 bit = getbit(samples,i);
420 for (; i < count * 32; i++) {
426 bit = getbit(samples,i);
444 EXPORT_SYMBOL_GPL(ir_input_init);
445 EXPORT_SYMBOL_GPL(ir_input_nokey);
446 EXPORT_SYMBOL_GPL(ir_input_keydown);
448 EXPORT_SYMBOL_GPL(ir_extract_bits);
449 EXPORT_SYMBOL_GPL(ir_dump_samples);
450 EXPORT_SYMBOL_GPL(ir_decode_biphase);
451 EXPORT_SYMBOL_GPL(ir_decode_pulsedistance);