u-boot-brain/arch/x86/include/asm/arch-baytrail/acpi/lpc.asl

/*
 * Copyright (C) 2007-2009 coresystems GmbH
 * Copyright (C) 2013 Google Inc.
 * Copyright (C) 2016 Bin Meng <bmeng.cn@gmail.com>
 *
 * Modified from coreboot src/soc/intel/baytrail/acpi/lpc.asl
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/* Intel LPC Bus Device - 0:1f.0 */

Scope (\)
{
	/* Intel Legacy Block */
	OperationRegion(ILBS, SystemMemory, ILB_BASE_ADDRESS, ILB_BASE_SIZE)
	Field(ILBS, AnyAcc, NoLock, Preserve) {
		Offset (0x8),
		PRTA, 8,
		PRTB, 8,
		PRTC, 8,
		PRTD, 8,
		PRTE, 8,
		PRTF, 8,
		PRTG, 8,
		PRTH, 8,
		Offset (0x88),
		    , 3,
		UI3E, 1,
		UI4E, 1
	}
}

Device (LPCB)
{
	Name(_ADR, 0x001f0000)

	OperationRegion(LPC0, PCI_Config, 0x00, 0x100)
	Field(LPC0, AnyAcc, NoLock, Preserve) {
		Offset(0x08),
		SRID, 8,
		Offset(0x80),
		C1EN, 1,
		Offset(0x84)
	}

	#include <asm/acpi/irqlinks.asl>

	/* Firmware Hub */
	Device (FWH)
	{
		Name(_HID, EISAID("INT0800"))
		Name(_CRS, ResourceTemplate()
		{
			Memory32Fixed(ReadOnly, 0xff000000, 0x01000000)
		})
	}

	/* 8259 Interrupt Controller */
	Device (PIC)
	{
		Name(_HID, EISAID("PNP0000"))
		Name(_CRS, ResourceTemplate()
		{
			IO(Decode16, 0x20, 0x20, 0x01, 0x02)
			IO(Decode16, 0x24, 0x24, 0x01, 0x02)
			IO(Decode16, 0x28, 0x28, 0x01, 0x02)
			IO(Decode16, 0x2c, 0x2c, 0x01, 0x02)
			IO(Decode16, 0x30, 0x30, 0x01, 0x02)
			IO(Decode16, 0x34, 0x34, 0x01, 0x02)
			IO(Decode16, 0x38, 0x38, 0x01, 0x02)
			IO(Decode16, 0x3c, 0x3c, 0x01, 0x02)
			IO(Decode16, 0xa0, 0xa0, 0x01, 0x02)
			IO(Decode16, 0xa4, 0xa4, 0x01, 0x02)
			IO(Decode16, 0xa8, 0xa8, 0x01, 0x02)
			IO(Decode16, 0xac, 0xac, 0x01, 0x02)
			IO(Decode16, 0xb0, 0xb0, 0x01, 0x02)
			IO(Decode16, 0xb4, 0xb4, 0x01, 0x02)
			IO(Decode16, 0xb8, 0xb8, 0x01, 0x02)
			IO(Decode16, 0xbc, 0xbc, 0x01, 0x02)
			IO(Decode16, 0x4d0, 0x4d0, 0x01, 0x02)
			IRQNoFlags () { 2 }
		})
	}

	/* 8254 timer */
	Device (TIMR)
	{
		Name(_HID, EISAID("PNP0100"))
		Name(_CRS, ResourceTemplate()
		{
			IO(Decode16, 0x40, 0x40, 0x01, 0x04)
			IO(Decode16, 0x50, 0x50, 0x10, 0x04)
			IRQNoFlags() { 0 }
		})
	}

	/* HPET */
	Device (HPET)
	{
		Name(_HID, EISAID("PNP0103"))
		Name(_CID, 0x010CD041)
		Name(_CRS, ResourceTemplate()
		{
			Memory32Fixed(ReadOnly, HPET_BASE_ADDRESS, HPET_BASE_SIZE)
		})

		Method(_STA)
		{
			Return (STA_VISIBLE)
		}
	}

	/* Internal UART */
	Device (IURT)
	{
		Name(_HID, EISAID("PNP0501"))
		Name(_UID, 1)

		Method(_STA, 0, Serialized)
		{
			/*
			 * TODO:
			 *
			 * Need to hide the internal UART depending on whether
			 * internal UART is enabled or not so that external
			 * SuperIO UART can be exposed to system.
			 */
			Store(1, UI3E)
			Store(1, UI4E)
			Store(1, C1EN)
			Return (STA_VISIBLE)

		}

		Method(_DIS, 0, Serialized)
		{
			Store(0, UI3E)
			Store(0, UI4E)
			Store(0, C1EN)
		}

		Method(_CRS, 0, Serialized)
		{
			Name(BUF0, ResourceTemplate()
			{
				IO(Decode16, 0x03f8, 0x03f8, 0x01, 0x08)
				IRQNoFlags() { 3 }
			})

			Name(BUF1, ResourceTemplate()
			{
				IO(Decode16, 0x03f8, 0x03f8, 0x01, 0x08)
				IRQNoFlags() { 4 }
			})

			If (LLessEqual(SRID, 0x04)) {
				Return (BUF0)
			} Else {
				Return (BUF1)
			}
		}
	}

	/* Real Time Clock */
	Device (RTC)
	{
		Name(_HID, EISAID("PNP0B00"))
		Name(_CRS, ResourceTemplate()
		{
			IO(Decode16, 0x70, 0x70, 1, 8)
			/*
			 * Disable as Windows doesn't like it, and systems
			 * don't seem to use it
			 */
			/* IRQNoFlags() { 8 } */
		})
	}

	/* LPC device: Resource consumption */
	Device (LDRC)
	{
		Name(_HID, EISAID("PNP0C02"))
		Name(_UID, 2)

		Name(RBUF, ResourceTemplate()
		{
			IO(Decode16, 0x61, 0x61, 0x1, 0x01) /* NMI Status */
			IO(Decode16, 0x63, 0x63, 0x1, 0x01) /* CPU Reserved */
			IO(Decode16, 0x65, 0x65, 0x1, 0x01) /* CPU Reserved */
			IO(Decode16, 0x67, 0x67, 0x1, 0x01) /* CPU Reserved */
			IO(Decode16, 0x80, 0x80, 0x1, 0x01) /* Port 80 Post */
			IO(Decode16, 0x92, 0x92, 0x1, 0x01) /* CPU Reserved */
			IO(Decode16, 0xb2, 0xb2, 0x1, 0x02) /* SWSMI */
		})

		Method(_CRS, 0, NotSerialized)
		{
			Return (RBUF)
		}
	}
}