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@infradead.org> 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/interrupt.h> 29#include <linux/input.h> 30#include <linux/usb.h> 31 32#include "em28xx.h" 33 34static unsigned int disable_ir = 0; 35module_param(disable_ir, int, 0444); 36MODULE_PARM_DESC(disable_ir,"disable infrared remote support"); 37 38static unsigned int ir_debug = 0; 39module_param(ir_debug, int, 0644); 40MODULE_PARM_DESC(ir_debug,"enable debug messages [IR]"); 41 42#define dprintk(fmt, arg...) if (ir_debug) \ 43 printk(KERN_DEBUG "%s/ir: " fmt, ir->c.name , ## arg) 44 45/* ----------------------------------------------------------------------- */ 46 47static int get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) 48{ 49 unsigned char b; 50 51 /* poll IR chip */ 52 if (1 != i2c_master_recv(&ir->c,&b,1)) { 53 dprintk("read error\n"); 54 return -EIO; 55 } 56 57 /* it seems that 0xFE indicates that a button is still hold 58 down, while 0xff indicates that no button is hold 59 down. 0xfe sequences are sometimes interrupted by 0xFF */ 60 61 dprintk("key %02x\n", b); 62 63 if (b == 0xff) 64 return 0; 65 66 if (b == 0xfe) 67 /* keep old data */ 68 return 1; 69 70 *ir_key = b; 71 *ir_raw = b; 72 return 1; 73} 74 75 76static int get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) 77{ 78 unsigned char buf[2]; 79 unsigned char code; 80 81 /* poll IR chip */ 82 if (2 != i2c_master_recv(&ir->c,buf,2)) 83 return -EIO; 84 85 /* Does eliminate repeated parity code */ 86 if (buf[1]==0xff) 87 return 0; 88 89 ir->old=buf[1]; 90 91 /* Rearranges bits to the right order */ 92 code= ((buf[0]&0x01)<<5) | /* 0010 0000 */ 93 ((buf[0]&0x02)<<3) | /* 0001 0000 */ 94 ((buf[0]&0x04)<<1) | /* 0000 1000 */ 95 ((buf[0]&0x08)>>1) | /* 0000 0100 */ 96 ((buf[0]&0x10)>>3) | /* 0000 0010 */ 97 ((buf[0]&0x20)>>5); /* 0000 0001 */ 98 99 dprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x)\n",code,buf[0]); 100 101 /* return key */ 102 *ir_key = code; 103 *ir_raw = code; 104 return 1; 105} 106 107static int get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) 108{ 109 unsigned char buf[3]; 110 111 /* poll IR chip */ 112 113 if (3 != i2c_master_recv(&ir->c,buf,3)) { 114 dprintk("read error\n"); 115 return -EIO; 116 } 117 118 dprintk("key %02x\n", buf[2]&0x3f); 119 if (buf[0]!=0x00){ 120 return 0; 121 } 122 123 *ir_key = buf[2]&0x3f; 124 *ir_raw = buf[2]&0x3f; 125 126 return 1; 127} 128 129/* ----------------------------------------------------------------------- */ 130void em28xx_set_ir(struct em28xx * dev,struct IR_i2c *ir) 131{ 132 if (disable_ir) { 133 ir->get_key=NULL; 134 return ; 135 } 136 137 /* detect & configure */ 138 switch (dev->model) { 139 case (EM2800_BOARD_UNKNOWN): 140 break; 141 case (EM2820_BOARD_UNKNOWN): 142 break; 143 case (EM2800_BOARD_TERRATEC_CINERGY_200): 144 case (EM2820_BOARD_TERRATEC_CINERGY_250): 145 ir->ir_codes = ir_codes_em_terratec; 146 ir->get_key = get_key_terratec; 147 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (EM28XX Terratec)"); 148 break; 149 case (EM2820_BOARD_PINNACLE_USB_2): 150 ir->ir_codes = ir_codes_pinnacle_grey; 151 ir->get_key = get_key_pinnacle_usb_grey; 152 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (EM28XX Pinnacle PCTV)"); 153 break; 154 case (EM2820_BOARD_HAUPPAUGE_WINTV_USB_2): 155 ir->ir_codes = ir_codes_hauppauge_new; 156 ir->get_key = get_key_em_haup; 157 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (EM2840 Hauppauge)"); 158 break; 159 case (EM2820_BOARD_MSI_VOX_USB_2): 160 break; 161 case (EM2800_BOARD_LEADTEK_WINFAST_USBII): 162 break; 163 case (EM2800_BOARD_KWORLD_USB2800): 164 break; 165 } 166} 167 168/* ---------------------------------------------------------------------- 169 * Local variables: 170 * c-basic-offset: 8 171 * End: 172 */ 173