From e8ffda78623677f7935b30901a173405b4861bda Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Sun, 30 Jul 2017 09:23:11 -0400 Subject: media: rc: ir-nec-decoder: move scancode composing code into a shared function The NEC scancode composing and protocol type detection in ir_nec_decode() is generic enough to be a shared function. Let's create an inline function in rc-core.h, so that other remote control drivers can reuse this function to save some code. Signed-off-by: Shawn Guo Signed-off-by: Sean Young Signed-off-by: Mauro Carvalho Chehab --- include/media/rc-core.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'include/media/rc-core.h') diff --git a/include/media/rc-core.h b/include/media/rc-core.h index 16bd89caa22d..b6c18840d125 100644 --- a/include/media/rc-core.h +++ b/include/media/rc-core.h @@ -340,4 +340,35 @@ static inline u32 ir_extract_bits(u32 data, u32 mask) return value; } +/* Get NEC scancode and protocol type from address and command bytes */ +static inline u32 ir_nec_bytes_to_scancode(u8 address, u8 not_address, + u8 command, u8 not_command, + enum rc_type *protocol) +{ + u32 scancode; + + if ((command ^ not_command) != 0xff) { + /* NEC transport, but modified protocol, used by at + * least Apple and TiVo remotes + */ + scancode = not_address << 24 | + address << 16 | + not_command << 8 | + command; + *protocol = RC_TYPE_NEC32; + } else if ((address ^ not_address) != 0xff) { + /* Extended NEC */ + scancode = address << 16 | + not_address << 8 | + command; + *protocol = RC_TYPE_NECX; + } else { + /* Normal NEC */ + scancode = address << 8 | command; + *protocol = RC_TYPE_NEC; + } + + return scancode; +} + #endif /* _RC_CORE */ -- cgit v1.2.3