/*
*
* some common structs and functions to handle infrared remotes via
* input layer ...
*
* (c) 2003 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <media/ir-common.h>
/* -------------------------------------------------------------------------- */
MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
MODULE_LICENSE("GPL");
static int repeat = 1;
module_param(repeat, int, 0444);
MODULE_PARM_DESC(repeat,"auto-repeat for IR keys (default: on)");
static int debug = 0; /* debug level (0,1,2) */
module_param(debug, int, 0644);
#define dprintk(level, fmt, arg...) if (debug >= level) \
printk(KERN_DEBUG fmt , ## arg)
/* -------------------------------------------------------------------------- */
/* generic RC5 keytable */
/* see http://users.pandora.be/nenya/electronics/rc5/codes00.htm */
/* used by old (black) Hauppauge remotes */
IR_KEYTAB_TYPE ir_codes_rc5_tv[IR_KEYTAB_SIZE] = {
/* Keys 0 to 9 */
[ 0x00 ] = KEY_KP0,
[ 0x01 ] = KEY_KP1,
[ 0x02 ] = KEY_KP2,
[ 0x03 ] = KEY_KP3,
[ 0x04 ] = KEY_KP4,
[ 0x05 ] = KEY_KP5,
[ 0x06 ] = KEY_KP6,
[ 0x07 ] = KEY_KP7,
[ 0x08 ] = KEY_KP8,
[ 0x09 ] = KEY_KP9,
[ 0x0b ] = KEY_CHANNEL, /* channel / program (japan: 11) */
[ 0x0c ] = KEY_POWER, /* standby */
[ 0x0d ] = KEY_MUTE, /* mute / demute */
[ 0x0f ] = KEY_TV, /* display */
[ 0x10 ] = KEY_VOLUMEUP,
[ 0x11 ] = KEY_VOLUMEDOWN,
[ 0x12 ] = KEY_BRIGHTNESSUP,
[ 0x13 ] = KEY_BRIGHTNESSDOWN,
[ 0x1e ] = KEY_SEARCH, /* search + */
[ 0x20 ] = KEY_CHANNELUP, /* channel / program + */
[ 0x21 ] = KEY_CHANNELDOWN, /* channel / program - */
[ 0x22 ] = KEY_CHANNEL, /* alt / channel */
[ 0x23 ] = KEY_LANGUAGE, /* 1st / 2nd language */
[ 0x26 ] = KEY_SLEEP, /* sleeptimer */
[ 0x2e ] = KEY_MENU, /* 2nd controls (USA: menu) */
[ 0x30 ] = KEY_PAUSE,
[ 0x32 ] = KEY_REWIND,
[ 0x33 ] = KEY_GOTO,
[ 0x35 ] = KEY_PLAY,
[ 0x36 ] = KEY_STOP,
[ 0x37 ] = KEY_RECORD, /* recording */
[ 0x3c ] = KEY_TEXT, /* teletext submode (Japan: 12) */
[ 0x3d ] = KEY_SUSPEND, /* system standby */
};
EXPORT_SYMBOL_GPL(ir_codes_rc5_tv);
/* Table for Leadtek Winfast Remote Controls - used by both bttv and cx88 */
IR_KEYTAB_TYPE ir_codes_winfast[IR_KEYTAB_SIZE] = {
/* Keys 0 to 9 */
[ 18 ] = KEY_KP0,
[ 5 ] = KEY_KP1,
[ 6 ] = KEY_KP2,
[ 7 ] = KEY_KP3,
[ 9 ] = KEY_KP4,
[ 10 ] = KEY_KP5,
[ 11 ] = KEY_KP6,
[ 13 ] = KEY_KP7,
[ 14 ] = KEY_KP8,
[ 15 ] = KEY_KP9,
[ 0 ] = KEY_POWER,
[ 2 ] = KEY_TUNER, /* TV/FM */
[ 30 ] = KEY_VIDEO,
[ 4 ] = KEY_VOLUMEUP,
[ 8 ] = KEY_VOLUMEDOWN,
[ 12 ] = KEY_CHANNELUP,
[ 16 ] = KEY_CHANNELDOWN,
[ 3 ] = KEY_ZOOM, /* fullscreen */
[ 31 ] = KEY_SUBTITLE, /* closed caption/teletext */
[ 32 ] = KEY_SLEEP,
[ 20 ] = KEY_MUTE,
[ 43 ] = KEY_RED,
[ 44 ] = KEY_GREEN,
[ 45 ] = KEY_YELLOW,
[ 46 ] = KEY_BLUE,
[ 24 ] = KEY_KPPLUS, /* fine tune + */
[ 25 ] = KEY_KPMINUS, /* fine tune - */
[ 33 ] = KEY_KPDOT,
[ 19 ] = KEY_KPENTER,
[ 34 ] = KEY_BACK,
[ 35 ] = KEY_PLAYPAUSE,
[ 36 ] = KEY_NEXT,
[ 38 ] = KEY_STOP,
[ 39 ] = KEY_RECORD
};
EXPORT_SYMBOL_GPL(ir_codes_winfast);
/* empty keytable, can be used as placeholder for not-yet created keytables */
IR_KEYTAB_TYPE ir_codes_empty[IR_KEYTAB_SIZE] = {
[ 42 ] = KEY_COFFEE,
};
EXPORT_SYMBOL_GPL(ir_codes_empty);
/* Hauppauge: the newer, gray remotes (seems there are multiple
* slightly different versions), shipped with cx88+ivtv cards.
* almost rc5 coding, but some non-standard keys */
IR_KEYTAB_TYPE ir_codes_hauppauge_new[IR_KEYTAB_SIZE] = {
/* Keys 0 to 9 */
[ 0x00 ] = KEY_KP0,
[ 0x01 ] = KEY_KP1,
[ 0x02 ] = KEY_KP2,
[ 0x03 ] = KEY_KP3,
[ 0x04 ] = KEY_KP4,
[ 0x05 ] = KEY_KP5,
[ 0x06 ] = KEY_KP6,
[ 0x07 ] = KEY_KP7,
[ 0x08 ] = KEY_KP8,
[ 0x09 ] = KEY_KP9,
[ 0x0a ] = KEY_TEXT, /* keypad asterisk as well */
[ 0x0b ] = KEY_RED, /* red button */
[ 0x0c ] = KEY_RADIO,
[ 0x0d ] = KEY_MENU,
[ 0x0e ] = KEY_SUBTITLE, /* also the # key */
[ 0x0f ] = KEY_MUTE,
[ 0x10 ] = KEY_VOLUMEUP,
[ 0x11 ] = KEY_VOLUMEDOWN,
[ 0x12 ] = KEY_PREVIOUS, /* previous channel */
[ 0x14 ] = KEY_UP,
[ 0x15 ] = KEY_DOWN,
[ 0x16 ] = KEY_LEFT,
[ 0x17 ] = KEY_RIGHT,
[ 0x18 ] = KEY_VIDEO, /* Videos */
[ 0x19 ] = KEY_AUDIO, /* Music */
/* 0x1a: Pictures - presume this means
"Multimedia Home Platform" -
no "PICTURES" key in input.h
*/
[ 0x1a ] = KEY_MHP,
[ 0x1b ] = KEY_EPG, /* Guide */
[ 0x1c ] = KEY_TV,
[ 0x1e ] = KEY_NEXTSONG, /* skip >| */
[ 0x1f ] = KEY_EXIT, /* back/exit */
[ 0x20 ] = KEY_CHANNELUP, /* channel / program + */
[ 0x21 ] = KEY_CHANNELDOWN, /* channel / program - */
[ 0x22 ] = KEY_CHANNEL, /* source (old black remote) */
[ 0x24 ] = KEY_PREVIOUSSONG, /* replay |< */
[ 0x25 ] = KEY_ENTER, /* OK */
[ 0x26 ] = KEY_SLEEP, /* minimize (old black remote) */
[ 0x29 ] = KEY_BLUE, /* blue key */
[ 0x2e ] = KEY_GREEN, /* green button */
[ 0x30 ] = KEY_PAUSE, /* pause */
[ 0x32 ] = KEY_REWIND, /* backward << */
[ 0x34 ] = KEY_FASTFORWARD, /* forward >> */
[ 0x35 ] = KEY_PLAY,
[ 0x36 ] = KEY_STOP,
[ 0x37 ] = KEY_RECORD, /* recording */
[ 0x38 ] = KEY_YELLOW, /* yellow key */
[ 0x3b ] = KEY_SELECT, /* top right button */
[ 0x3c ] = KEY_ZOOM, /* full */
[ 0x3d ] = KEY_POWER, /* system power (green button) */
};
EXPORT_SYMBOL(ir_codes_hauppauge_new);
IR_KEYTAB_TYPE ir_codes_pixelview[IR_KEYTAB_SIZE] = {
[ 2 ] = KEY_KP0,
[ 1 ] = KEY_KP1,
[ 11 ] = KEY_KP2,
[ 27 ] = KEY_KP3,
[ 5 ] = KEY_KP4,
[ 9 ] = KEY_KP5,
[ 21 ] = KEY_KP6,
[ 6 ] = KEY_KP7,
[ 10 ] = KEY_KP8,
[ 18 ] = KEY_KP9,
[ 3 ] = KEY_TUNER, /* TV/FM */
[ 7 ] = KEY_SEARCH, /* scan */
[ 28 ] = KEY_ZOOM, /* full screen */
[ 30 ] = KEY_POWER,
[ 23 ] = KEY_VOLUMEDOWN,
[ 31 ] = KEY_VOLUMEUP,
[ 20 ] = KEY_CHANNELDOWN,
[ 22 ] = KEY_CHANNELUP,
[ 24 ] = KEY_MUTE,
[ 0 ] = KEY_LIST, /* source */
[ 19 ] = KEY_INFO, /* loop */
[ 16 ] = KEY_LAST, /* +100 */
[ 13 ] = KEY_CLEAR, /* reset */
[ 12 ] = BTN_RIGHT, /* fun++ */
[ 4 ] = BTN_LEFT, /* fun-- */
[ 14 ] = KEY_GOTO, /* function */
[ 15 ] = KEY_STOP, /* freeze */
};
EXPORT_SYMBOL(ir_codes_pixelview);
/* -------------------------------------------------------------------------- */
static void ir_input_key_event(struct input_dev *dev, struct ir_input_state *ir)
{
if (KEY_RESERVED == ir->keycode) {
printk(KERN_INFO "%s: unknown key: key=0x%02x raw=0x%02x down=%d\n",
dev->name,ir->ir_key,ir->ir_raw,ir->keypressed);
return;
}
dprintk(1,"%s: key event code=%d down=%d\n",
dev->name,ir->keycode,ir->keypressed);
input_report_key(dev,ir->keycode,ir->keypressed);
input_sync(dev);
}
/* -------------------------------------------------------------------------- */
void ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
int ir_type, IR_KEYTAB_TYPE *ir_codes)
{
int i;
ir->ir_type = ir_type;
if (ir_codes)
memcpy(ir->ir_codes, ir_codes, sizeof(ir->ir_codes));
dev->keycode = ir->ir_codes;
dev->keycodesize = sizeof(IR_KEYTAB_TYPE);
dev->keycodemax = IR_KEYTAB_SIZE;
for (i = 0; i < IR_KEYTAB_SIZE; i++)
set_bit(ir->ir_codes[i], dev->keybit);
clear_bit(0, dev->keybit);
set_bit(EV_KEY, dev->evbit);
if (repeat)
set_bit(EV_REP, dev->evbit);
}
void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir)
{
if (ir->keypressed) {
ir->keypressed = 0;
ir_input_key_event(dev,ir);
}
}
void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
u32 ir_key, u32 ir_raw)
{
u32 keycode = IR_KEYCODE(ir->ir_codes, ir_key);
if (ir->keypressed && ir->keycode != keycode) {
ir->keypressed = 0;
ir_input_key_event(dev,ir);
}
if (!ir->keypressed) {
ir->ir_key = ir_key;
ir->ir_raw = ir_raw;
ir->keycode = keycode;
ir->keypressed = 1;
ir_input_key_event(dev,ir);
}
}
/* -------------------------------------------------------------------------- */
u32 ir_extract_bits(u32 data, u32 mask)
{
int mbit, vbit;
u32 value;
value = 0;
vbit = 0;
for (mbit = 0; mbit < 32; mbit++) {
if (!(mask & ((u32)1 << mbit)))
continue;
if (data & ((u32)1 << mbit))
value |= (1 << vbit);
vbit++;
}
return value;
}
static int inline getbit(u32 *samples, int bit)
{
return (samples[bit/32] & (1 << (31-(bit%32)))) ? 1 : 0;
}
/* sump raw samples for visual debugging ;) */
int ir_dump_samples(u32 *samples, int count)
{
int i, bit, start;
printk(KERN_DEBUG "ir samples: ");
start = 0;
for (i = 0; i < count * 32; i++) {
bit = getbit(samples,i);
if (bit)
start = 1;
if (0 == start)
continue;
printk("%s", bit ? "#" : "_");
}
printk("\n");
return 0;
}
/* decode raw samples, pulse distance coding used by NEC remotes */
int ir_decode_pulsedistance(u32 *samples, int count, int low, int high)
{
int i,last,bit,len;
u32 curBit;
u32 value;
/* find start burst */
for (i = len = 0; i < count * 32; i++) {
bit = getbit(samples,i);
if (bit) {
len++;
} else {
if (len >= 29)
break;
len = 0;
}
}
/* start burst to short */
if (len < 29)
return 0xffffffff;
/* find start silence */
for (len = 0; i < count * 32; i++) {
bit = getbit(samples,i);
if (bit) {
break;
} else {
len++;
}
}
/* silence to short */
if (len < 7)
return 0xffffffff;
/* go decoding */
len = 0;
last = 1;
value = 0; curBit = 1;
for (; i < count * 32; i++) {
bit = getbit(samples,i);
if (last) {
if(bit) {
continue;
} else {
len = 1;
}
} else {
if (bit) {
if (len > (low + high) /2)
value |= curBit;
curBit <<= 1;
if (curBit == 1)
break;
} else {
len++;
}
}
last = bit;
}
return value;
}
/* decode raw samples, biphase coding, used by rc5 for example */
int ir_decode_biphase(u32 *samples, int count, int low, int high)
{
int i,last,bit,len,flips;
u32 value;
/* find start bit (1) */
for (i = 0; i < 32; i++) {
bit = getbit(samples,i);
if (bit)
break;
}
/* go decoding */
len = 0;
flips = 0;
value = 1;
for (; i < count * 32; i++) {
if (len > high)
break;
if (flips > 1)
break;
last = bit;
bit = getbit(samples,i);
if (last == bit) {
len++;
continue;
}
if (len < low) {
len++;
flips++;
continue;
}
value <<= 1;
value |= bit;
flips = 0;
len = 1;
}
return value;
}
EXPORT_SYMBOL_GPL(ir_input_init);
EXPORT_SYMBOL_GPL(ir_input_nokey);
EXPORT_SYMBOL_GPL(ir_input_keydown);
EXPORT_SYMBOL_GPL(ir_extract_bits);
EXPORT_SYMBOL_GPL(ir_dump_samples);
EXPORT_SYMBOL_GPL(ir_decode_biphase);
EXPORT_SYMBOL_GPL(ir_decode_pulsedistance);
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
