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Commit d35afc5f authored by Sean Young's avatar Sean Young Committed by Mauro Carvalho Chehab
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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: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent cb981257
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+50 −0
Original line number Diff line number Diff line
@@ -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)