The current decoder for the RC6 IR protocol supports mode 0 (16 bit) and mode 6A. In mode 6A the decoder supports either 32-bit data (for Microsoft's MCE RC) or 24 bit.
I would like to support a Sky/Sky+ standard RC which transmits RC6-6-20 i.e. 20 bit data. The transmitted frame format is identical to the 24 bit form so I'm curious as to what remotes transmit 24 bit data or was this an error and it should be 20? RC6-6-20 is explained here: http://www.guiott.com/wrc/RC6-6.html If 24-bit mode is in use, is there a way to select between 20 and 24 bit operation? I made the following simple mod to ir-rc6-decoder.c and my Sky/Sky+ RCs decode correctly (with a custom keytable): --- a/drivers/media/rc/ir-rc6-decoder.c 2011-05-19 06:06:34.000000000 +0200 +++ b/drivers/media/rc/ir-rc6-decoder.c 2011-09-19 13:02:35.000000000 +0200 @@ -17,14 +17,14 @@ /* * This decoder currently supports: * RC6-0-16 (standard toggle bit in header) - * RC6-6A-24 (no toggle bit) + * RC6-6A-20 (no toggle bit) * RC6-6A-32 (MCE version with toggle bit in body) */ #define RC6_UNIT 444444 /* us */ #define RC6_HEADER_NBITS 4 /* not including toggle bit */ #define RC6_0_NBITS 16 -#define RC6_6A_SMALL_NBITS 24 +#define RC6_6A_SMALL_NBITS 20 #define RC6_6A_LARGE_NBITS 32 #define RC6_PREFIX_PULSE (6 * RC6_UNIT) #define RC6_PREFIX_SPACE (2 * RC6_UNIT) @@ -231,7 +231,7 @@ again: scancode = data->body & ~RC6_6A_MCE_TOGGLE_MASK; } else { toggle = 0; - scancode = data->body & 0xffffff; + scancode = data->body; } IR_dprintk(1, "RC6(6A) scancode 0x%08x (toggle: %u)\n", -- Lawrence Rust -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
