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[media] rc: ir-sharp-decoder: Add encode capability 

Add the capability to encode Sharp scancodes as raw events.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
hifive-unleashed-5.1
Sean Young 2016-12-06 18:11:30 -02:00 committed by Mauro Carvalho Chehab
parent cb981257dc
commit d35afc5fe0
1 changed files with 50 additions and 0 deletions
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50
drivers/media/rc/ir-sharp-decoder.c
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@ -173,9 +173,59 @@ static int ir_sharp_decode(struct rc_dev *dev, struct ir_raw_event ev)
return -EINVAL;
}
static const struct ir_raw_timings_pd ir_sharp_timings = {
.header_pulse = 0,
.header_space = 0,
.bit_pulse = SHARP_BIT_PULSE,
.bit_space[0] = SHARP_BIT_0_PERIOD,
.bit_space[1] = SHARP_BIT_1_PERIOD,
.trailer_pulse = SHARP_BIT_PULSE,
.trailer_space = SHARP_ECHO_SPACE,
.msb_first = 1,
};
/**
* ir_sharp_encode() - Encode a scancode as a stream of raw events
*
* @protocol: protocol to encode
* @scancode: scancode to encode
* @events: array of raw ir events to write into
* @max: maximum size of @events
*
* Returns: The number of events written.
* -ENOBUFS if there isn't enough space in the array to fit the
* encoding. In this case all @max events will have been written.
*/
static int ir_sharp_encode(enum rc_type protocol, u32 scancode,
struct ir_raw_event *events, unsigned int max)
{
struct ir_raw_event *e = events;
int ret;
u32 raw;
raw = (((bitrev8(scancode >> 8) >> 3) << 8) & 0x1f00) |
bitrev8(scancode);
ret = ir_raw_gen_pd(&e, max, &ir_sharp_timings, SHARP_NBITS,
(raw << 2) | 2);
if (ret < 0)
return ret;
max -= ret;
raw = (((bitrev8(scancode >> 8) >> 3) << 8) & 0x1f00) |
bitrev8(~scancode);
ret = ir_raw_gen_pd(&e, max, &ir_sharp_timings, SHARP_NBITS,
(raw << 2) | 1);
if (ret < 0)
return ret;
return e - events;
}
static struct ir_raw_handler sharp_handler = {
.protocols = RC_BIT_SHARP,
.decode = ir_sharp_decode,
.encode = ir_sharp_encode,
};
static int __init ir_sharp_decode_init(void)