V4L/DVB (3197a): IR keymaps are exported by the ir-common module now
Moved keymaps to the ir-common module, and export them from there, instead of #including them in each module Included missing files from V4L/DVB(3197). Signed-off-by: Ricardo Cerqueira <v4l@cerqueira.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Ricardo Cerqueira
Mauro Carvalho Chehab
parent
9a7871ba11
commit
d15549acfe
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@ -0,0 +1,272 @@
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/*
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*
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* some common structs and functions to handle infrared remotes via
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* input layer ...
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*
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* (c) 2003 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/string.h>
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#include <media/ir-common.h>
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/* -------------------------------------------------------------------------- */
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MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
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MODULE_LICENSE("GPL");
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static int repeat = 1;
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module_param(repeat, int, 0444);
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MODULE_PARM_DESC(repeat,"auto-repeat for IR keys (default: on)");
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static int debug = 0; /* debug level (0,1,2) */
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module_param(debug, int, 0644);
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#define dprintk(level, fmt, arg...) if (debug >= level) \
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printk(KERN_DEBUG fmt , ## arg)
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/* -------------------------------------------------------------------------- */
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static void ir_input_key_event(struct input_dev *dev, struct ir_input_state *ir)
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{
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if (KEY_RESERVED == ir->keycode) {
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printk(KERN_INFO "%s: unknown key: key=0x%02x raw=0x%02x down=%d\n",
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dev->name,ir->ir_key,ir->ir_raw,ir->keypressed);
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return;
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}
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dprintk(1,"%s: key event code=%d down=%d\n",
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dev->name,ir->keycode,ir->keypressed);
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input_report_key(dev,ir->keycode,ir->keypressed);
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input_sync(dev);
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}
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/* -------------------------------------------------------------------------- */
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void ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
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int ir_type, IR_KEYTAB_TYPE *ir_codes)
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{
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int i;
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ir->ir_type = ir_type;
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if (ir_codes)
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memcpy(ir->ir_codes, ir_codes, sizeof(ir->ir_codes));
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dev->keycode = ir->ir_codes;
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dev->keycodesize = sizeof(IR_KEYTAB_TYPE);
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dev->keycodemax = IR_KEYTAB_SIZE;
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for (i = 0; i < IR_KEYTAB_SIZE; i++)
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set_bit(ir->ir_codes[i], dev->keybit);
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clear_bit(0, dev->keybit);
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set_bit(EV_KEY, dev->evbit);
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if (repeat)
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set_bit(EV_REP, dev->evbit);
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}
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void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir)
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{
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if (ir->keypressed) {
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ir->keypressed = 0;
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ir_input_key_event(dev,ir);
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}
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}
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void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
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u32 ir_key, u32 ir_raw)
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{
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u32 keycode = IR_KEYCODE(ir->ir_codes, ir_key);
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if (ir->keypressed && ir->keycode != keycode) {
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ir->keypressed = 0;
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ir_input_key_event(dev,ir);
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}
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if (!ir->keypressed) {
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ir->ir_key = ir_key;
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ir->ir_raw = ir_raw;
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ir->keycode = keycode;
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ir->keypressed = 1;
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ir_input_key_event(dev,ir);
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}
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}
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/* -------------------------------------------------------------------------- */
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u32 ir_extract_bits(u32 data, u32 mask)
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{
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int mbit, vbit;
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u32 value;
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value = 0;
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vbit = 0;
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for (mbit = 0; mbit < 32; mbit++) {
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if (!(mask & ((u32)1 << mbit)))
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continue;
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if (data & ((u32)1 << mbit))
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value |= (1 << vbit);
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vbit++;
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}
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return value;
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}
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static int inline getbit(u32 *samples, int bit)
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{
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return (samples[bit/32] & (1 << (31-(bit%32)))) ? 1 : 0;
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}
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/* sump raw samples for visual debugging ;) */
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int ir_dump_samples(u32 *samples, int count)
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{
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int i, bit, start;
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printk(KERN_DEBUG "ir samples: ");
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start = 0;
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for (i = 0; i < count * 32; i++) {
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bit = getbit(samples,i);
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if (bit)
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start = 1;
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if (0 == start)
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continue;
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printk("%s", bit ? "#" : "_");
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}
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printk("\n");
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return 0;
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}
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/* decode raw samples, pulse distance coding used by NEC remotes */
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int ir_decode_pulsedistance(u32 *samples, int count, int low, int high)
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{
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int i,last,bit,len;
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u32 curBit;
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u32 value;
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/* find start burst */
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for (i = len = 0; i < count * 32; i++) {
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bit = getbit(samples,i);
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if (bit) {
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len++;
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} else {
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if (len >= 29)
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break;
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len = 0;
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}
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}
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/* start burst to short */
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if (len < 29)
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return 0xffffffff;
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/* find start silence */
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for (len = 0; i < count * 32; i++) {
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bit = getbit(samples,i);
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if (bit) {
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break;
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} else {
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len++;
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}
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}
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/* silence to short */
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if (len < 7)
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return 0xffffffff;
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/* go decoding */
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len = 0;
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last = 1;
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value = 0; curBit = 1;
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for (; i < count * 32; i++) {
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bit = getbit(samples,i);
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if (last) {
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if(bit) {
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continue;
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} else {
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len = 1;
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}
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} else {
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if (bit) {
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if (len > (low + high) /2)
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value |= curBit;
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curBit <<= 1;
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if (curBit == 1)
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break;
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} else {
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len++;
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}
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}
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last = bit;
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}
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return value;
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}
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/* decode raw samples, biphase coding, used by rc5 for example */
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int ir_decode_biphase(u32 *samples, int count, int low, int high)
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{
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int i,last,bit,len,flips;
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u32 value;
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/* find start bit (1) */
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for (i = 0; i < 32; i++) {
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bit = getbit(samples,i);
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if (bit)
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break;
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}
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/* go decoding */
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len = 0;
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flips = 0;
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value = 1;
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for (; i < count * 32; i++) {
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if (len > high)
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break;
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if (flips > 1)
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break;
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last = bit;
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bit = getbit(samples,i);
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if (last == bit) {
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len++;
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continue;
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}
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if (len < low) {
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len++;
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flips++;
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continue;
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}
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value <<= 1;
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value |= bit;
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flips = 0;
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len = 1;
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}
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return value;
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}
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EXPORT_SYMBOL_GPL(ir_input_init);
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EXPORT_SYMBOL_GPL(ir_input_nokey);
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EXPORT_SYMBOL_GPL(ir_input_keydown);
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EXPORT_SYMBOL_GPL(ir_extract_bits);
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EXPORT_SYMBOL_GPL(ir_dump_samples);
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EXPORT_SYMBOL_GPL(ir_decode_biphase);
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EXPORT_SYMBOL_GPL(ir_decode_pulsedistance);
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/*
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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