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| author | Shawn Guo <shawn.guo@linaro.org> | 2017-07-30 15:23:11 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-08-20 15:49:18 +0200 |
| commit | e8ffda78623677f7935b30901a173405b4861bda (patch) | |
| tree | bb728024aa0607541546d1ed35bcd8a27af3c46c /include/media | |
| parent | media: rc: sunxi-cir: explicitly request exclusive reset control (diff) | |
| download | linux-e8ffda78623677f7935b30901a173405b4861bda.tar.xz linux-e8ffda78623677f7935b30901a173405b4861bda.zip | |
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 <shawn.guo@linaro.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/rc-core.h | 31 |
1 files changed, 31 insertions, 0 deletions
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 */ |