src/soc/intel/icelake/acpi/scs.asl

/* SPDX-License-Identifier: GPL-2.0-only */

#include <soc/pcr_ids.h>

Scope (\_SB.PCI0) {

	/*
	 * Clear register 0x1C20/0x4820
	 * Arg0 - PCR Port ID
	 */
	Method(SCSC, 1, Serialized)
	{
		^PCRA (Arg0, 0x1C20, 0x0)
		^PCRA (Arg0, 0x4820, 0x0)
	}

	/* EMMC */
	Device(PEMC) {
		Name(_ADR, 0x001A0000)
		Name (_DDN, "eMMC Controller")
		Name (TEMP, 0)

		OperationRegion(SCSR, PCI_Config, 0x00, 0x100)
		Field(SCSR, WordAcc, NoLock, Preserve) {
			Offset (0x84),	/* PMECTRLSTATUS */
			PMCR, 16,
			Offset (0xA2),	/* PG_CONFIG */
			, 2,
			PGEN, 1,	/* PG_ENABLE */
		}

		Method(_INI) {
			/* Clear register 0x1C20/0x4820 */
			^^SCSC (PID_EMMC)
		}

		Method(_PS0, 0, Serialized) {
			Stall (50) // Sleep 50 us

			PGEN = 0 // Disable PG

			/* Clear register 0x1C20/0x4820 */
			^^SCSC (PID_EMMC)

			/* Set Power State to D0 */
			PMCR &= 0xFFFC
			^TEMP = PMCR
		}

		Method(_PS3, 0, Serialized) {
			PGEN = 1 // Enable PG

			/* Set Power State to D3 */
			PMCR |= 3
			^TEMP = PMCR
		}

		Device (CARD)
		{
			Name (_ADR, 0x00000008)
			Method (_RMV, 0, NotSerialized)
			{
				Return (0)
			}
		}
	}

	/* SD CARD */
	Device (SDXC)
	{
		Name (_ADR, 0x00140005)
		Name (_DDN, "SD Controller")
		Name (TEMP, 0)

		OperationRegion (SDPC, PCI_Config, 0x00, 0x100)
		Field (SDPC, WordAcc, NoLock, Preserve)
		{
			Offset (0x84),	/* PMECTRLSTATUS */
			PMCR, 16,
			Offset (0xA2),	/* PG_CONFIG */
			, 2,
			PGEN, 1,	/* PG_ENABLE */
		}

		Method(_INI)
		{
			/* Clear register 0x1C20/0x4820 */
			^^SCSC (PID_SDX)
		}

		Method (_PS0, 0, Serialized)
		{
			PGEN = 0 /* Disable PG */

			/* Clear register 0x1C20/0x4820 */
			^^SCSC (PID_SDX)

			/* Set Power State to D0 */
			PMCR &= 0xFFFC
			^TEMP = PMCR
		}

		Method (_PS3, 0, Serialized)
		{
			PGEN = 1 /* Enable PG */

			/* Set Power State to D3 */
			PMCR |= 3
			^TEMP = PMCR
		}

		Device (CARD)
		{
			Name (_ADR, 0x00000008)
			Method (_RMV, 0, NotSerialized)
			{
				Return (1)
			}
		}
	} /* Device (SDXC) */
}