6ea54d938b
Signed-off-by: Douglas Schilling Landgraf <dougsland@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
/*
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handle em28xx IR remotes via linux kernel input layer.
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Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
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Markus Rechberger <mrechberger@gmail.com>
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Mauro Carvalho Chehab <mchehab@infradead.org>
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Sascha Sommer <saschasommer@freenet.de>
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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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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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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/init.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/input.h>
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#include <linux/usb.h>
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#include "em28xx.h"
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static unsigned int ir_debug;
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module_param(ir_debug, int, 0644);
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MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
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#define dprintk(fmt, arg...) \
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if (ir_debug) { \
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printk(KERN_DEBUG "%s/ir: " fmt, ir->c.name , ## arg); \
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}
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/* ----------------------------------------------------------------------- */
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int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
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{
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unsigned char b;
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/* poll IR chip */
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if (1 != i2c_master_recv(&ir->c, &b, 1)) {
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dprintk("read error\n");
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return -EIO;
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}
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/* it seems that 0xFE indicates that a button is still hold
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down, while 0xff indicates that no button is hold
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down. 0xfe sequences are sometimes interrupted by 0xFF */
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dprintk("key %02x\n", b);
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if (b == 0xff)
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return 0;
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if (b == 0xfe)
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/* keep old data */
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return 1;
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*ir_key = b;
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*ir_raw = b;
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return 1;
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}
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int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
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{
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unsigned char buf[2];
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unsigned char code;
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/* poll IR chip */
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if (2 != i2c_master_recv(&ir->c, buf, 2))
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return -EIO;
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/* Does eliminate repeated parity code */
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if (buf[1] == 0xff)
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return 0;
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ir->old = buf[1];
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/* Rearranges bits to the right order */
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code = ((buf[0]&0x01)<<5) | /* 0010 0000 */
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((buf[0]&0x02)<<3) | /* 0001 0000 */
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((buf[0]&0x04)<<1) | /* 0000 1000 */
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((buf[0]&0x08)>>1) | /* 0000 0100 */
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((buf[0]&0x10)>>3) | /* 0000 0010 */
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((buf[0]&0x20)>>5); /* 0000 0001 */
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dprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x)\n",
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code, buf[0]);
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/* return key */
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*ir_key = code;
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*ir_raw = code;
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return 1;
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}
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int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
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u32 *ir_raw)
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{
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unsigned char buf[3];
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/* poll IR chip */
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if (3 != i2c_master_recv(&ir->c, buf, 3)) {
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dprintk("read error\n");
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return -EIO;
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}
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dprintk("key %02x\n", buf[2]&0x3f);
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if (buf[0] != 0x00)
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return 0;
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*ir_key = buf[2]&0x3f;
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*ir_raw = buf[2]&0x3f;
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return 1;
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}
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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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