Revert "[media] rc: ir-rc5-decoder: Add encode capability"

	return -EINVAL;

}

static struct ir_raw_timings_manchester ir_rc5_timings = {

	.leader			= RC5_UNIT,

	.pulse_space_start	= 0,

	.clock			= RC5_UNIT,

	.trailer_space		= RC5_UNIT * 10,

};

static struct ir_raw_timings_manchester ir_rc5x_timings[2] = {

	{

		.leader			= RC5_UNIT,

		.pulse_space_start	= 0,

		.clock			= RC5_UNIT,

		.trailer_space		= RC5X_SPACE,

	},

	{

		.clock			= RC5_UNIT,

		.trailer_space		= RC5_UNIT * 10,

	},

};

static struct ir_raw_timings_manchester ir_rc5_sz_timings = {

	.leader				= RC5_UNIT,

	.pulse_space_start		= 0,

	.clock				= RC5_UNIT,

	.trailer_space			= RC5_UNIT * 10,

};

static int ir_rc5_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_rc5_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_rc5_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;

	unsigned int data, xdata, command, commandx, system;

	/* Detect protocol and convert scancode to raw data */

	if (protocols & RC_BIT_RC5 &&

	    !ir_rc5_validate_filter(scancode, 0x1f7f)) {

		/* decode scancode */

		command  = (scancode->data & 0x003f) >> 0;

		commandx = (scancode->data & 0x0040) >> 6;

		system   = (scancode->data & 0x1f00) >> 8;

		/* encode data */

		data = !commandx << 12 | system << 6 | command;

		/* Modulate the data */

		ret = ir_raw_gen_manchester(&e, max, &ir_rc5_timings, RC5_NBITS,

					    data);

		if (ret < 0)

			return ret;

	} else if (protocols & RC_BIT_RC5X &&

		   !ir_rc5_validate_filter(scancode, 0x1f7f3f)) {

		/* decode scancode */

		xdata    = (scancode->data & 0x00003f) >> 0;

		command  = (scancode->data & 0x003f00) >> 8;

		commandx = (scancode->data & 0x004000) >> 14;

		system   = (scancode->data & 0x1f0000) >> 16;

		/* commandx and system overlap, bits must match when encoded */

		if (commandx == (system & 0x1))

			return -EINVAL;

		/* encode data */

		data = 1 << 18 | system << 12 | command << 6 | xdata;

		/* Modulate the data */

		ret = ir_raw_gen_manchester(&e, max, &ir_rc5x_timings[0],

					CHECK_RC5X_NBITS,

					data >> (RC5X_NBITS-CHECK_RC5X_NBITS));

		if (ret < 0)

			return ret;

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

					&ir_rc5x_timings[1],

					RC5X_NBITS - CHECK_RC5X_NBITS,

					data);

		if (ret < 0)

			return ret;

	} else if (protocols & RC_BIT_RC5_SZ &&

		   !ir_rc5_validate_filter(scancode, 0x2fff)) {

		/* RC5-SZ scancode is raw enough for Manchester as it is */

		ret = ir_raw_gen_manchester(&e, max, &ir_rc5_sz_timings,

					RC5_SZ_NBITS, scancode->data & 0x2fff);

		if (ret < 0)

			return ret;

	} else {

		return -EINVAL;

	}

	return e - events;

}

static struct ir_raw_handler rc5_handler = {

	.protocols	= RC_BIT_RC5 | RC_BIT_RC5X | RC_BIT_RC5_SZ,

	.decode		= ir_rc5_decode,

	.encode		= ir_rc5_encode,

};

static int __init ir_rc5_decode_init(void)