Revert "[media] rc: ir-rc6-decoder: Add encode capability"

	return -EINVAL;

}

static struct ir_raw_timings_manchester ir_rc6_timings[4] = {

	{

		.leader			= RC6_PREFIX_PULSE,

		.pulse_space_start	= 0,

		.clock			= RC6_UNIT,

		.invert			= 1,

		.trailer_space		= RC6_PREFIX_SPACE,

	},

	{

		.clock			= RC6_UNIT,

		.invert			= 1,

	},

	{

		.clock			= RC6_UNIT * 2,

		.invert			= 1,

	},

	{

		.clock			= RC6_UNIT,

		.invert			= 1,

		.trailer_space		= RC6_SUFFIX_SPACE,

	},

};

static int ir_rc6_validate_filter(const struct rc_scancode_filter *scancode,

				  unsigned int important_bits)

{

	/* all important bits of scancode should be set in mask */

	if (~scancode->mask & important_bits)

		return -EINVAL;

	/* extra bits in mask should be zero in data */

	if (scancode->mask & scancode->data & ~important_bits)

		return -EINVAL;

	return 0;

}

/**

 * ir_rc6_encode() - Encode a scancode as a stream of raw events

 *

 * @protocols:	allowed protocols

 * @scancode:	scancode filter describing scancode (helps distinguish between

 *		protocol subtypes when scancode is ambiguous)

 * @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.

 *		-EINVAL if the scancode is ambiguous or invalid.

 */

static int ir_rc6_encode(u64 protocols,

			 const struct rc_scancode_filter *scancode,

			 struct ir_raw_event *events, unsigned int max)

{

	int ret;

	struct ir_raw_event *e = events;

	if (protocols & RC_BIT_RC6_0 &&

	    !ir_rc6_validate_filter(scancode, 0xffff)) {

		/* Modulate the preamble */

		ret = ir_raw_gen_manchester(&e, max, &ir_rc6_timings[0], 0, 0);

		if (ret < 0)

			return ret;

		/* Modulate the header (Start Bit & Mode-0) */

		ret = ir_raw_gen_manchester(&e, max - (e - events),

					    &ir_rc6_timings[1],

					    RC6_HEADER_NBITS, (1 << 3));

		if (ret < 0)

			return ret;

		/* Modulate Trailer Bit */

		ret = ir_raw_gen_manchester(&e, max - (e - events),

					    &ir_rc6_timings[2], 1, 0);

		if (ret < 0)

			return ret;

		/* Modulate rest of the data */

		ret = ir_raw_gen_manchester(&e, max - (e - events),

					    &ir_rc6_timings[3], RC6_0_NBITS,

					    scancode->data);

		if (ret < 0)

			return ret;

	} else if (protocols & (RC_BIT_RC6_6A_20 | RC_BIT_RC6_6A_24 |

				RC_BIT_RC6_6A_32 | RC_BIT_RC6_MCE) &&

		   !ir_rc6_validate_filter(scancode, 0x8fffffff)) {

		/* Modulate the preamble */

		ret = ir_raw_gen_manchester(&e, max, &ir_rc6_timings[0], 0, 0);

		if (ret < 0)

			return ret;

		/* Modulate the header (Start Bit & Header-version 6 */

		ret = ir_raw_gen_manchester(&e, max - (e - events),

					    &ir_rc6_timings[1],

					    RC6_HEADER_NBITS, (1 << 3 | 6));

		if (ret < 0)

			return ret;

		/* Modulate Trailer Bit */

		ret = ir_raw_gen_manchester(&e, max - (e - events),

					    &ir_rc6_timings[2], 1, 0);

		if (ret < 0)

			return ret;

		/* Modulate rest of the data */

		ret = ir_raw_gen_manchester(&e, max - (e - events),

					    &ir_rc6_timings[3],

					    fls(scancode->mask),

					    scancode->data);

		if (ret < 0)

			return ret;

	} else {

		return -EINVAL;

	}

	return e - events;

}

static struct ir_raw_handler rc6_handler = {

	.protocols	= RC_BIT_RC6_0 | RC_BIT_RC6_6A_20 |

			  RC_BIT_RC6_6A_24 | RC_BIT_RC6_6A_32 |

			  RC_BIT_RC6_MCE,

	.decode		= ir_rc6_decode,

	.encode		= ir_rc6_encode,

};

static int __init ir_rc6_decode_init(void)