/*
 * This file is part of the coreboot project.
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

Device (UCSI)
{
	Name (_HID, "GOOG000E")
	Name (_CID, EisaId ("PNP0CA0"))
	Name (_DDN, "Wilco EC UCSI")
	Name (_UID, One)
	Name (_STA, 0xf)

	/* Value written to EC control register to start UCSI command */
	Name (UCMD, 0xE0)

	/* Shared memory fields are defined in the SSDT */
	External (VER0, FieldUnitObj)
	External (VER1, FieldUnitObj)
	External (CCI0, FieldUnitObj)
	External (CCI1, FieldUnitObj)
	External (CCI2, FieldUnitObj)
	External (CCI3, FieldUnitObj)
	External (CTL0, FieldUnitObj)
	External (CTL1, FieldUnitObj)
	External (CTL2, FieldUnitObj)
	External (CTL3, FieldUnitObj)
	External (CTL4, FieldUnitObj)
	External (CTL5, FieldUnitObj)
	External (CTL6, FieldUnitObj)
	External (CTL7, FieldUnitObj)
	External (MGI0, FieldUnitObj)
	External (MGI1, FieldUnitObj)
	External (MGI2, FieldUnitObj)
	External (MGI3, FieldUnitObj)
	External (MGI4, FieldUnitObj)
	External (MGI5, FieldUnitObj)
	External (MGI6, FieldUnitObj)
	External (MGI7, FieldUnitObj)
	External (MGI8, FieldUnitObj)
	External (MGI9, FieldUnitObj)
	External (MGIA, FieldUnitObj)
	External (MGIB, FieldUnitObj)
	External (MGIC, FieldUnitObj)
	External (MGID, FieldUnitObj)
	External (MGIE, FieldUnitObj)
	External (MGIF, FieldUnitObj)
	External (MGO0, FieldUnitObj)
	External (MGO1, FieldUnitObj)
	External (MGO2, FieldUnitObj)
	External (MGO3, FieldUnitObj)
	External (MGO4, FieldUnitObj)
	External (MGO5, FieldUnitObj)
	External (MGO6, FieldUnitObj)
	External (MGO7, FieldUnitObj)
	External (MGO8, FieldUnitObj)
	External (MGO9, FieldUnitObj)
	External (MGOA, FieldUnitObj)
	External (MGOB, FieldUnitObj)
	External (MGOC, FieldUnitObj)
	External (MGOD, FieldUnitObj)
	External (MGOE, FieldUnitObj)
	External (MGOF, FieldUnitObj)

	Method (INIT)
	{
		/* Read UCSI version from EC into shared memory */
		^VER0 = R (^^UVR0)
		^VER1 = R (^^UVR1)
	}

	Method (_DSM, 4, Serialized)
	{
		If (Arg0 != ToUUID ("6f8398c2-7ca4-11e4-ad36-631042b5008f")) {
			Return (Buffer (One) { Zero })
		}

		Switch (ToInteger (Arg2))
		{
			Case (Zero)
			{
				Return (Buffer (One) { 0x07 })
			}
			Case (One)
			{
				/* Write Message Out */
				W (^^UMO0, ^MGO0)
				W (^^UMO1, ^MGO1)
				W (^^UMO2, ^MGO2)
				W (^^UMO3, ^MGO3)
				W (^^UMO4, ^MGO4)
				W (^^UMO5, ^MGO5)
				W (^^UMO6, ^MGO6)
				W (^^UMO7, ^MGO7)
				W (^^UMO8, ^MGO8)
				W (^^UMO9, ^MGO9)
				W (^^UMOA, ^MGOA)
				W (^^UMOB, ^MGOB)
				W (^^UMOC, ^MGOC)
				W (^^UMOD, ^MGOD)
				W (^^UMOE, ^MGOE)
				W (^^UMOF, ^MGOF)

				/* Write Control */
				W (^^UCL0, ^CTL0)
				W (^^UCL1, ^CTL1)
				W (^^UCL2, ^CTL2)
				W (^^UCL3, ^CTL3)
				W (^^UCL4, ^CTL4)
				W (^^UCL5, ^CTL5)
				W (^^UCL6, ^CTL6)
				W (^^UCL7, ^CTL7)

				/* Start EC Command */
				W (^^UCTL, ^UCMD)
			}
			Case (2)
			{
				/* Read Message In */
				^MGI0 = R (^^UMI0)
				^MGI1 = R (^^UMI1)
				^MGI2 = R (^^UMI2)
				^MGI3 = R (^^UMI3)
				^MGI4 = R (^^UMI4)
				^MGI5 = R (^^UMI5)
				^MGI6 = R (^^UMI6)
				^MGI7 = R (^^UMI7)
				^MGI8 = R (^^UMI8)
				^MGI9 = R (^^UMI9)
				^MGIA = R (^^UMIA)
				^MGIB = R (^^UMIB)
				^MGIC = R (^^UMIC)
				^MGID = R (^^UMID)
				^MGIE = R (^^UMIE)
				^MGIF = R (^^UMIF)

				/* Read Status */
				^CCI0 = R (^^UCI0)
				^CCI1 = R (^^UCI1)
				^CCI2 = R (^^UCI2)
				^CCI3 = R (^^UCI3)
			}
		}
		Return (Buffer (One) { Zero })
	}
}