diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-input.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-input.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/drivers/media/video/em28xx/em28xx-input.c b/drivers/media/video/em28xx/em28xx-input.c new file mode 100644 index 00000000000..9b94f77d6fd --- /dev/null +++ b/drivers/media/video/em28xx/em28xx-input.c @@ -0,0 +1,181 @@ +/* + handle em28xx IR remotes via linux kernel input layer. + + Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> + Markus Rechberger <mrechberger@gmail.com> + Mauro Carvalho Chehab <mchehab@brturbo.com.br> + Sascha Sommer <saschasommer@freenet.de> + + 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/moduleparam.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <linux/input.h> +#include <linux/usb.h> + +#include "em28xx.h" + +static unsigned int disable_ir = 0; +module_param(disable_ir, int, 0444); +MODULE_PARM_DESC(disable_ir,"disable infrared remote support"); + +static unsigned int ir_debug = 0; +module_param(ir_debug, int, 0644); +MODULE_PARM_DESC(ir_debug,"enable debug messages [IR]"); + +#define dprintk(fmt, arg...) if (ir_debug) \ + printk(KERN_DEBUG "%s/ir: " fmt, ir->c.name , ## arg) + +/* ---------------------------------------------------------------------- */ + +static IR_KEYTAB_TYPE ir_codes_em_terratec[IR_KEYTAB_SIZE] = { + [ 0x01 ] = KEY_CHANNEL, + [ 0x02 ] = KEY_SELECT, + [ 0x03 ] = KEY_MUTE, + [ 0x04 ] = KEY_POWER, + [ 0x05 ] = KEY_KP1, + [ 0x06 ] = KEY_KP2, + [ 0x07 ] = KEY_KP3, + [ 0x08 ] = KEY_CHANNELUP, + [ 0x09 ] = KEY_KP4, + [ 0x0a ] = KEY_KP5, + [ 0x0b ] = KEY_KP6, + [ 0x0c ] = KEY_CHANNELDOWN, + [ 0x0d ] = KEY_KP7, + [ 0x0e ] = KEY_KP8, + [ 0x0f ] = KEY_KP9, + [ 0x10 ] = KEY_VOLUMEUP, + [ 0x11 ] = KEY_KP0, + [ 0x12 ] = KEY_MENU, + [ 0x13 ] = KEY_PRINT, + [ 0x14 ] = KEY_VOLUMEDOWN, + [ 0x16 ] = KEY_PAUSE, + [ 0x18 ] = KEY_RECORD, + [ 0x19 ] = KEY_REWIND, + [ 0x1a ] = KEY_PLAY, + [ 0x1b ] = KEY_FORWARD, + [ 0x1c ] = KEY_BACKSPACE, + [ 0x1e ] = KEY_STOP, + [ 0x40 ] = KEY_ZOOM, +}; + +/* ----------------------------------------------------------------------- */ + +static int get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) +{ + unsigned char b; + + /* poll IR chip */ + if (1 != i2c_master_recv(&ir->c,&b,1)) { + dprintk("read error\n"); + return -EIO; + } + + /* it seems that 0xFE indicates that a button is still hold + down, while 0xff indicates that no button is hold + down. 0xfe sequences are sometimes interrupted by 0xFF */ + + dprintk("key %02x\n", b); + + if (b == 0xff) + return 0; + + if (b == 0xfe) + /* keep old data */ + return 1; + + *ir_key = b; + *ir_raw = b; + return 1; +} + + +static int get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) +{ + unsigned char buf[2]; + unsigned char code; + + /* poll IR chip */ + if (2 != i2c_master_recv(&ir->c,buf,2)) + return -EIO; + + /* Does eliminate repeated parity code */ + if (buf[1]==0xff) + return 0; + + ir->old=buf[1]; + + /* Rearranges bits to the right order */ + code= ((buf[0]&0x01)<<5) | /* 0010 0000 */ + ((buf[0]&0x02)<<3) | /* 0001 0000 */ + ((buf[0]&0x04)<<1) | /* 0000 1000 */ + ((buf[0]&0x08)>>1) | /* 0000 0100 */ + ((buf[0]&0x10)>>3) | /* 0000 0010 */ + ((buf[0]&0x20)>>5); /* 0000 0001 */ + + dprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x)\n",code,buf[0]); + + /* return key */ + *ir_key = code; + *ir_raw = code; + return 1; +} + +/* ----------------------------------------------------------------------- */ +void em28xx_set_ir(struct em28xx * dev,struct IR_i2c *ir) +{ + if (disable_ir) { + ir->get_key=NULL; + return ; + } + + /* detect & configure */ + switch (dev->model) { + case (EM2800_BOARD_UNKNOWN): + break; + case (EM2820_BOARD_UNKNOWN): + break; + case (EM2800_BOARD_TERRATEC_CINERGY_200): + case (EM2820_BOARD_TERRATEC_CINERGY_250): + ir->ir_codes = ir_codes_em_terratec; + ir->get_key = get_key_terratec; + snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (EM28XX Terratec)"); + break; + case (EM2820_BOARD_PINNACLE_USB_2): + break; + case (EM2820_BOARD_HAUPPAUGE_WINTV_USB_2): + ir->ir_codes = ir_codes_hauppauge_new; + ir->get_key = get_key_em_haup; + snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (EM2840 Hauppauge)"); + break; + case (EM2820_BOARD_MSI_VOX_USB_2): + break; + case (EM2800_BOARD_LEADTEK_WINFAST_USBII): + break; + case (EM2800_BOARD_KWORLD_USB2800): + break; + } +} + +/* ---------------------------------------------------------------------- + * Local variables: + * c-basic-offset: 8 + * End: + */ |