diff options
Diffstat (limited to 'drivers/media/common/ir-common.c')
| -rw-r--r-- | drivers/media/common/ir-common.c | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/drivers/media/common/ir-common.c b/drivers/media/common/ir-common.c new file mode 100644 index 000000000000..8c842e2f59a2 --- /dev/null +++ b/drivers/media/common/ir-common.c @@ -0,0 +1,381 @@ +/* + * $Id: ir-common.c,v 1.8 2005/02/22 12:28:40 kraxel Exp $ + * + * 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 <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] = { + [ 0x00 ] = KEY_KP0, // 0 + [ 0x01 ] = KEY_KP1, // 1 + [ 0x02 ] = KEY_KP2, // 2 + [ 0x03 ] = KEY_KP3, // 3 + [ 0x04 ] = KEY_KP4, // 4 + [ 0x05 ] = KEY_KP5, // 5 + [ 0x06 ] = KEY_KP6, // 6 + [ 0x07 ] = KEY_KP7, // 7 + [ 0x08 ] = KEY_KP8, // 8 + [ 0x09 ] = KEY_KP9, // 9 + + [ 0x0b ] = KEY_CHANNEL, // channel / program (japan: 11) + [ 0x0c ] = KEY_POWER, // standby + [ 0x0d ] = KEY_MUTE, // mute / demute + [ 0x0f ] = KEY_TV, // display + [ 0x10 ] = KEY_VOLUMEUP, // volume + + [ 0x11 ] = KEY_VOLUMEDOWN, // volume - + [ 0x12 ] = KEY_BRIGHTNESSUP, // brightness + + [ 0x13 ] = KEY_BRIGHTNESSDOWN, // brightness - + [ 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, // pause + [ 0x32 ] = KEY_REWIND, // rewind + [ 0x33 ] = KEY_GOTO, // go to + [ 0x35 ] = KEY_PLAY, // play + [ 0x36 ] = KEY_STOP, // stop + [ 0x37 ] = KEY_RECORD, // recording + [ 0x3c ] = KEY_TEXT, // teletext submode (Japan: 12) + [ 0x3d ] = KEY_SUSPEND, // system standby + +#if 0 /* FIXME */ + [ 0x0a ] = KEY_RESERVED, // 1/2/3 digits (japan: 10) + [ 0x0e ] = KEY_RESERVED, // P.P. (personal preference) + [ 0x14 ] = KEY_RESERVED, // colour saturation + + [ 0x15 ] = KEY_RESERVED, // colour saturation - + [ 0x16 ] = KEY_RESERVED, // bass + + [ 0x17 ] = KEY_RESERVED, // bass - + [ 0x18 ] = KEY_RESERVED, // treble + + [ 0x19 ] = KEY_RESERVED, // treble - + [ 0x1a ] = KEY_RESERVED, // balance right + [ 0x1b ] = KEY_RESERVED, // balance left + [ 0x1c ] = KEY_RESERVED, // contrast + + [ 0x1d ] = KEY_RESERVED, // contrast - + [ 0x1f ] = KEY_RESERVED, // tint/hue + + [ 0x24 ] = KEY_RESERVED, // spacial stereo on/off + [ 0x25 ] = KEY_RESERVED, // mono / stereo (USA) + [ 0x27 ] = KEY_RESERVED, // tint / hue - + [ 0x28 ] = KEY_RESERVED, // RF switch/PIP select + [ 0x29 ] = KEY_RESERVED, // vote + [ 0x2a ] = KEY_RESERVED, // timed page/channel clck + [ 0x2b ] = KEY_RESERVED, // increment (USA) + [ 0x2c ] = KEY_RESERVED, // decrement (USA) + [ 0x2d ] = KEY_RESERVED, // + [ 0x2f ] = KEY_RESERVED, // PIP shift + [ 0x31 ] = KEY_RESERVED, // erase + [ 0x34 ] = KEY_RESERVED, // wind + [ 0x38 ] = KEY_RESERVED, // external 1 + [ 0x39 ] = KEY_RESERVED, // external 2 + [ 0x3a ] = KEY_RESERVED, // PIP display mode + [ 0x3b ] = KEY_RESERVED, // view data mode / advance + [ 0x3e ] = KEY_RESERVED, // crispener on/off + [ 0x3f ] = KEY_RESERVED, // system select +#endif +}; +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] = { + [ 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, + [ 18 ] = KEY_KP0, + + [ 0 ] = KEY_POWER, +// [ 27 ] = MTS button + [ 2 ] = KEY_TUNER, // TV/FM + [ 30 ] = KEY_VIDEO, +// [ 22 ] = display button + [ 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, +// [ 41 ] = boss key + [ 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 - +// [ 42 ] = picture in picture + [ 33 ] = KEY_KPDOT, + [ 19 ] = KEY_KPENTER, +// [ 17 ] = recall + [ 34 ] = KEY_BACK, + [ 35 ] = KEY_PLAYPAUSE, + [ 36 ] = KEY_NEXT, +// [ 37 ] = time shifting + [ 38 ] = KEY_STOP, + [ 39 ] = KEY_RECORD +// [ 40 ] = snapshot +}; +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] = { + [ 0x00 ] = KEY_KP0, // 0 + [ 0x01 ] = KEY_KP1, // 1 + [ 0x02 ] = KEY_KP2, // 2 + [ 0x03 ] = KEY_KP3, // 3 + [ 0x04 ] = KEY_KP4, // 4 + [ 0x05 ] = KEY_KP5, // 5 + [ 0x06 ] = KEY_KP6, // 6 + [ 0x07 ] = KEY_KP7, // 7 + [ 0x08 ] = KEY_KP8, // 8 + [ 0x09 ] = KEY_KP9, // 9 + [ 0x0b ] = KEY_RED, // red button + [ 0x0c ] = KEY_OPTION, // black key without text + [ 0x0d ] = KEY_MENU, // menu + [ 0x0f ] = KEY_MUTE, // mute + [ 0x10 ] = KEY_VOLUMEUP, // volume + + [ 0x11 ] = KEY_VOLUMEDOWN, // volume - + [ 0x1e ] = KEY_NEXT, // 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_PREVIOUS, // 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, // play + [ 0x36 ] = KEY_STOP, // 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); + +/* -------------------------------------------------------------------------- */ + +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)); + + init_input_dev(dev); + 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); + } +#if 0 + /* maybe do something like this ??? */ + input_event(a, EV_IR, ir->ir_type, ir->ir_raw); +#endif +} + +/* -------------------------------------------------------------------------- */ + +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, 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); + +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ |