diff options
Diffstat (limited to 'drivers/media/rc/ir-functions.c')
| -rw-r--r-- | drivers/media/rc/ir-functions.c | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/drivers/media/rc/ir-functions.c b/drivers/media/rc/ir-functions.c deleted file mode 100644 index 14397d0541d8..000000000000 --- a/drivers/media/rc/ir-functions.c +++ /dev/null @@ -1,120 +0,0 @@ -/* - * some common functions to handle infrared remote protocol decoding for - * drivers which have not yet been (or can't be) converted to use the - * regular protocol decoders... - * - * (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/string.h> -#include <linux/jiffies.h> -#include <media/ir-common.h> -#include "rc-core-priv.h" - -/* -------------------------------------------------------------------------- */ - -MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]"); -MODULE_LICENSE("GPL"); - -/* RC5 decoding stuff, moved from bttv-input.c to share it with - * saa7134 */ - -/* decode raw bit pattern to RC5 code */ -static u32 ir_rc5_decode(unsigned int code) -{ - unsigned int org_code = code; - unsigned int pair; - unsigned int rc5 = 0; - int i; - - for (i = 0; i < 14; ++i) { - pair = code & 0x3; - code >>= 2; - - rc5 <<= 1; - switch (pair) { - case 0: - case 2: - break; - case 1: - rc5 |= 1; - break; - case 3: - IR_dprintk(1, "ir-common: ir_rc5_decode(%x) bad code\n", org_code); - return 0; - } - } - IR_dprintk(1, "ir-common: code=%x, rc5=%x, start=%x, toggle=%x, address=%x, " - "instr=%x\n", rc5, org_code, RC5_START(rc5), - RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5)); - return rc5; -} - -void ir_rc5_timer_end(unsigned long data) -{ - struct card_ir *ir = (struct card_ir *)data; - struct timeval tv; - unsigned long current_jiffies; - u32 gap; - u32 rc5 = 0; - - /* get time */ - current_jiffies = jiffies; - do_gettimeofday(&tv); - - /* avoid overflow with gap >1s */ - if (tv.tv_sec - ir->base_time.tv_sec > 1) { - gap = 200000; - } else { - gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) + - tv.tv_usec - ir->base_time.tv_usec; - } - - /* signal we're ready to start a new code */ - ir->active = 0; - - /* Allow some timer jitter (RC5 is ~24ms anyway so this is ok) */ - if (gap < 28000) { - IR_dprintk(1, "ir-common: spurious timer_end\n"); - return; - } - - if (ir->last_bit < 20) { - /* ignore spurious codes (caused by light/other remotes) */ - IR_dprintk(1, "ir-common: short code: %x\n", ir->code); - } else { - ir->code = (ir->code << ir->shift_by) | 1; - rc5 = ir_rc5_decode(ir->code); - - /* two start bits? */ - if (RC5_START(rc5) != ir->start) { - IR_dprintk(1, "ir-common: rc5 start bits invalid: %u\n", RC5_START(rc5)); - - /* right address? */ - } else if (RC5_ADDR(rc5) == ir->addr) { - u32 toggle = RC5_TOGGLE(rc5); - u32 instr = RC5_INSTR(rc5); - - /* Good code */ - ir_keydown(ir->dev, instr, toggle); - IR_dprintk(1, "ir-common: instruction %x, toggle %x\n", - instr, toggle); - } - } -} -EXPORT_SYMBOL_GPL(ir_rc5_timer_end); |