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

   1 /*
   2  *
   3  * handle saa7134 IR remotes via linux kernel input layer.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  *
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/init.h>
  24 #include <linux/delay.h>
  25 #include <linux/sched.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/input.h>
  28 #include <linux/usb.h>
  29
  30 #include "em2820.h"
  31
  32 static unsigned int disable_ir = 0;
  33 module_param(disable_ir, int, 0444);
  34 MODULE_PARM_DESC(disable_ir,"disable infrared remote support");
  35
  36 static unsigned int ir_debug = 0;
  37 module_param(ir_debug, int, 0644);
  38 MODULE_PARM_DESC(ir_debug,"enable debug messages [IR]");
  39
  40 #define dprintk(fmt, arg...)    if (ir_debug) \
  41         printk(KERN_DEBUG "%s/ir: " fmt, ir->c.name , ## arg)
  42
  43 /* ---------------------------------------------------------------------- */
  44
  45 static IR_KEYTAB_TYPE ir_codes_em_pinnacle[IR_KEYTAB_SIZE] = {
  46         [  0 ] = KEY_CHANNEL,
  47         [  1 ] = KEY_SELECT,
  48         [  2 ] = KEY_MUTE,
  49         [  3 ] = KEY_POWER,
  50         [  4 ] = KEY_KP1,
  51         [  5 ] = KEY_KP2,
  52         [  6 ] = KEY_KP3,
  53         [  7 ] = KEY_CHANNELUP,
  54         [  8 ] = KEY_KP4,
  55         [  9 ] = KEY_KP5,
  56         [ 10 ] = KEY_KP6,
  57
  58         [ 11 ] = KEY_CHANNELDOWN,
  59         [ 12 ] = KEY_KP7,
  60         [ 13 ] = KEY_KP8,
  61         [ 14 ] = KEY_KP9,
  62         [ 15 ] = KEY_VOLUMEUP,
  63         [ 16 ] = KEY_KP0,
  64         [ 17 ] = KEY_MENU,
  65         [ 18 ] = KEY_PRINT,
  66
  67         [ 19 ] = KEY_VOLUMEDOWN,
  68         [ 21 ] = KEY_PAUSE,
  69         [ 23 ] = KEY_RECORD,
  70         [ 24 ] = KEY_REWIND,
  71         [ 25 ] = KEY_PLAY,
  72         [ 27 ] = KEY_BACKSPACE,
  73         [ 29 ] = KEY_STOP,
  74         [ 31 ] = KEY_ZOOM,
  75 };
  76
  77 /* ----------------------------------------------------------------------- */
  78
  79 static int get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
  80 {
  81         unsigned char buf[2];
  82         unsigned char code;
  83
  84         /* poll IR chip */
  85         if (2 != i2c_master_recv(&ir->c,buf,2))
  86                 return -EIO;
  87
  88         /* Does eliminate repeated parity code */
  89         if (buf[1]==0xff)
  90                 return 0;
  91
  92         /* avoid fast reapeating */
  93         if (buf[1]==ir->old)
  94                 return 0;
  95         ir->old=buf[1];
  96
  97         /* Rearranges bits to the right order */
  98         code=    ((buf[0]&0x01)<<5) | /* 0010 0000 */
  99                  ((buf[0]&0x02)<<3) | /* 0001 0000 */
 100                  ((buf[0]&0x04)<<1) | /* 0000 1000 */
 101                  ((buf[0]&0x08)>>1) | /* 0000 0100 */
 102                  ((buf[0]&0x10)>>3) | /* 0000 0010 */
 103                  ((buf[0]&0x20)>>5);  /* 0000 0001 */
 104
 105         dprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x)\n",code,buf[0]);
 106
 107         /* return key */
 108         *ir_key = code;
 109         *ir_raw = code;
 110         return 1;
 111 }
 112
 113 /* ----------------------------------------------------------------------- */
 114 void em2820_set_ir(struct em2820 * dev,struct IR_i2c *ir)
 115 {
 116         if (disable_ir)
 117                 return ;
 118
 119         /* detect & configure */
 120         switch (dev->model) {
 121         case (EM2800_BOARD_UNKNOWN):
 122                 break;
 123         case (EM2820_BOARD_UNKNOWN):
 124                 break;
 125         case (EM2820_BOARD_TERRATEC_CINERGY_250):
 126                 break;
 127         case (EM2820_BOARD_PINNACLE_USB_2):
 128                 ir->ir_codes = ir_codes_em_pinnacle;
 129                 break;
 130         case (EM2820_BOARD_HAUPPAUGE_WINTV_USB_2):
 131                 ir->ir_codes = ir_codes_hauppauge_new;
 132                 ir->get_key = get_key_em_haup;
 133                 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (EM2840 Hauppage)");
 134                 break;
 135         case (EM2820_BOARD_MSI_VOX_USB_2):
 136                 break;
 137         case (EM2800_BOARD_TERRATEC_CINERGY_200):
 138                 break;
 139         case (EM2800_BOARD_LEADTEK_WINFAST_USBII):
 140                 break;
 141         case (EM2800_BOARD_KWORLD_USB2800):
 142                 break;
 143         }
 144 }
 145
 146 /* ----------------------------------------------------------------------
 147  * Local variables:
 148  * c-basic-offset: 8
 149  * End:
 150  */