drivers/media/video/em28xx/em28xx-input.c

   1 /*
   2   handle em28xx IR remotes via linux kernel input layer.
   3
   4    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   5                       Markus Rechberger <mrechberger@gmail.com>
   6                       Mauro Carvalho Chehab <mchehab@brturbo.com.br>
   7                       Sascha Sommer <saschasommer@freenet.de>
   8
   9   This program is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU General Public License as published by
  11   the Free Software Foundation; either version 2 of the License, or
  12   (at your option) any later version.
  13
  14   This program is distributed in the hope that it will be useful,
  15   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17   GNU General Public License for more details.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with this program; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/init.h>
  27 #include <linux/delay.h>
  28 #include <linux/sched.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/input.h>
  31 #include <linux/usb.h>
  32
  33 #include "em28xx.h"
  34
  35 static unsigned int disable_ir = 0;
  36 module_param(disable_ir, int, 0444);
  37 MODULE_PARM_DESC(disable_ir,"disable infrared remote support");
  38
  39 static unsigned int ir_debug = 0;
  40 module_param(ir_debug, int, 0644);
  41 MODULE_PARM_DESC(ir_debug,"enable debug messages [IR]");
  42
  43 #define dprintk(fmt, arg...)    if (ir_debug) \
  44         printk(KERN_DEBUG "%s/ir: " fmt, ir->c.name , ## arg)
  45
  46 /* ---------------------------------------------------------------------- */
  47
  48 static IR_KEYTAB_TYPE ir_codes_em_terratec[IR_KEYTAB_SIZE] = {
  49         [ 0x01 ] = KEY_CHANNEL,
  50         [ 0x02 ] = KEY_SELECT,
  51         [ 0x03 ] = KEY_MUTE,
  52         [ 0x04 ] = KEY_POWER,
  53         [ 0x05 ] = KEY_KP1,
  54         [ 0x06 ] = KEY_KP2,
  55         [ 0x07 ] = KEY_KP3,
  56         [ 0x08 ] = KEY_CHANNELUP,
  57         [ 0x09 ] = KEY_KP4,
  58         [ 0x0a ] = KEY_KP5,
  59         [ 0x0b ] = KEY_KP6,
  60         [ 0x0c ] = KEY_CHANNELDOWN,
  61         [ 0x0d ] = KEY_KP7,
  62         [ 0x0e ] = KEY_KP8,
  63         [ 0x0f ] = KEY_KP9,
  64         [ 0x10 ] = KEY_VOLUMEUP,
  65         [ 0x11 ] = KEY_KP0,
  66         [ 0x12 ] = KEY_MENU,
  67         [ 0x13 ] = KEY_PRINT,
  68         [ 0x14 ] = KEY_VOLUMEDOWN,
  69         [ 0x16 ] = KEY_PAUSE,
  70         [ 0x18 ] = KEY_RECORD,
  71         [ 0x19 ] = KEY_REWIND,
  72         [ 0x1a ] = KEY_PLAY,
  73         [ 0x1b ] = KEY_FORWARD,
  74         [ 0x1c ] = KEY_BACKSPACE,
  75         [ 0x1e ] = KEY_STOP,
  76         [ 0x40 ] = KEY_ZOOM,
  77 };
  78
  79 /* ----------------------------------------------------------------------- */
  80
  81 static int get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
  82 {
  83         unsigned char b;
  84
  85         /* poll IR chip */
  86         if (1 != i2c_master_recv(&ir->c,&b,1)) {
  87                 dprintk("read error\n");
  88                 return -EIO;
  89         }
  90
  91         /* it seems that 0xFE indicates that a button is still hold
  92            down, while 0xff indicates that no button is hold
  93            down. 0xfe sequences are sometimes interrupted by 0xFF */
  94
  95         dprintk("key %02x\n", b);
  96
  97         if (b == 0xff)
  98                 return 0;
  99
 100         if (b == 0xfe)
 101                 /* keep old data */
 102                 return 1;
 103
 104         *ir_key = b;
 105         *ir_raw = b;
 106         return 1;
 107 }
 108
 109
 110 static int get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
 111 {
 112         unsigned char buf[2];
 113         unsigned char code;
 114
 115         /* poll IR chip */
 116         if (2 != i2c_master_recv(&ir->c,buf,2))
 117                 return -EIO;
 118
 119         /* Does eliminate repeated parity code */
 120         if (buf[1]==0xff)
 121                 return 0;
 122
 123         ir->old=buf[1];
 124
 125         /* Rearranges bits to the right order */
 126         code=    ((buf[0]&0x01)<<5) | /* 0010 0000 */
 127                  ((buf[0]&0x02)<<3) | /* 0001 0000 */
 128                  ((buf[0]&0x04)<<1) | /* 0000 1000 */
 129                  ((buf[0]&0x08)>>1) | /* 0000 0100 */
 130                  ((buf[0]&0x10)>>3) | /* 0000 0010 */
 131                  ((buf[0]&0x20)>>5);  /* 0000 0001 */
 132
 133         dprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x)\n",code,buf[0]);
 134
 135         /* return key */
 136         *ir_key = code;
 137         *ir_raw = code;
 138         return 1;
 139 }
 140
 141 /* ----------------------------------------------------------------------- */
 142 void em28xx_set_ir(struct em28xx * dev,struct IR_i2c *ir)
 143 {
 144         if (disable_ir) {
 145                 ir->get_key=NULL;
 146                 return ;
 147         }
 148
 149         /* detect & configure */
 150         switch (dev->model) {
 151         case (EM2800_BOARD_UNKNOWN):
 152                 break;
 153         case (EM2820_BOARD_UNKNOWN):
 154                 break;
 155         case (EM2800_BOARD_TERRATEC_CINERGY_200):
 156         case (EM2820_BOARD_TERRATEC_CINERGY_250):
 157                 ir->ir_codes = ir_codes_em_terratec;
 158                 ir->get_key = get_key_terratec;
 159                 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (EM28XX Terratec)");
 160                 break;
 161         case (EM2820_BOARD_PINNACLE_USB_2):
 162                 break;
 163         case (EM2820_BOARD_HAUPPAUGE_WINTV_USB_2):
 164                 ir->ir_codes = ir_codes_hauppauge_new;
 165                 ir->get_key = get_key_em_haup;
 166                 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (EM2840 Hauppauge)");
 167                 break;
 168         case (EM2820_BOARD_MSI_VOX_USB_2):
 169                 break;
 170         case (EM2800_BOARD_LEADTEK_WINFAST_USBII):
 171                 break;
 172         case (EM2800_BOARD_KWORLD_USB2800):
 173                 break;
 174         }
 175 }
 176
 177 /* ----------------------------------------------------------------------
 178  * Local variables:
 179  * c-basic-offset: 8
 180  * End:
 181  */