src/soc/amd/common/acpi/aoac.asl

/* SPDX-License-Identifier: GPL-2.0-or-later */

#define AOAC_DEVICE(DEV_ID, SX) \
	PowerResource(AOAC, SX, 0) { \
		OperationRegion (AOAC, SystemMemory, ACPIMMIO_BASE(AOAC) + 0x40 + (DEV_ID << 1), 2) \
		Field (AOAC, ByteAcc, NoLock, Preserve) { \
			/* \
			 * Target Device State \
			 * \
			 * 0 = D0 - Uninitialized \
			 * 1 = D0 - Initialized \
			 * 2 = D1/D2/D3Hot \
			 * 3 = D3Cold \
			 * \
			 * This field is only used to cut off register access. It does not \
			 * control any power states. D3Cold is the only value that will \
			 * cut off register access. All other values will allow register \
			 * access and are purely informational. \
			 */ \
			TDS,	2, \
\
			DS,	1, /* Device State - Purely informational */ \
\
			/* \
			 * Power On Dev \
			 * \
			 * 1 = Perform hardware sequence to power on the device \
			 * 0 = Perform hardware sequence to power off the device \
			 * \
			 * This register is only valid when Is Software Control = 0. \
			 */ \
			POD,	1, \
\
			/* Software Power On Reset B */ \
			SPRB,	1, \
			/* Software Ref Clock OK */ \
			SRCO,	1, \
			/* Software Reset B */ \
			SRB,	1, \
			/* \
			 * Is Software Control \
			 * \
			 * 1 = Allow software to control Power On Reset B, \
			 *     Ref Clock OK, and Reset B. \
			 * 0 = Hardware control \
			 */ \
			ISWC,	1, \
\
			/* Power Reset B State */ \
			PRBS,	1, \
			/* Ref Clock OK State */ \
			RCOS,	1, \
			/* Reset B State */ \
			RBS,	1, \
			/* Device Off Gating State */ \
			DOGS,	1, \
			/* D3 Cold State */ \
			D3CS,	1, \
			/* Device Clock OK State */ \
			COS,	1, \
			/* State of device */ \
			STA0,	1, \
			/* State of device */ \
			STA1,	1, \
		} \
		Method(_STA) { \
			Local0 = (PRBS && RCOS && RBS) \
\
			If (Local0) { \
				Return (1) \
			} Else { \
				Return (0) \
			} \
		} \
		Method(_ON, 0, Serialized) { \
			ISWC=0 \
			POD=1 \
\
			While (!PRBS || !RCOS || !RBS) { \
				Stall (100) \
			} \
		} \
		Method(_OFF, 0, Serialized) { \
			ISWC=0 \
			POD=0 \
\
			While (PRBS || RCOS || RBS) { \
				Stall (100) \
			} \
		} \
		Method(_RST, 0, Serialized) { \
			ISWC=1 \
			SRB=1 \
\
			/* Assert the SwRstB signal for 200 us */ \
			Stall (200) \
\
			SRB=0 \
			ISWC=0 \
\
			While (!PRBS || !RCOS || !RBS) { \
				Printf ("Waiting for device to complete reset") \
				Stall (100) \
			} \
		} \
	} \
	Name (_PR0, Package () { AOAC }) \
	Name (_PR2, Package () { AOAC }) \
	Name (_PR3, Package () { AOAC }) \
	Method (_PS0, 0, Serialized) { \
		^AOAC.TDS = 1 \
	} \
	Method (_PS3, 0, Serialized) { \
		^AOAC.TDS = 3 \
	}