1 files changed, 85 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/acpi/acpi/ufs.asl b/src/soc/intel/common/block/acpi/acpi/ufs.asl
new file mode 100644
index 0000000000..41c14d7863
--- /dev/null
+++ b/src/soc/intel/common/block/acpi/acpi/ufs.asl
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include <soc/pcr_ids.h>
+#include <soc/ufs.h>
+
+Scope (\_SB.PCI0)
+{
+	Device (UFS)
+	{
+		/* _ADR: Address */
+		Name (_ADR, UFS_ACPI_DEVICE)
+		/* _DDN: DOS Device Name */
+		Name (_DDN, "UFS Controller")
+		/* _DSD: Device-Specific Data */
+		Name (_DSD, Package (0x02)
+		{
+			/* Device Properties for _DSD */
+			ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package (0x01)
+			{
+				Package (0x02)
+				{
+					"ref-clk-freq",
+					CONFIG_SOC_INTEL_UFS_CLK_FREQ_HZ
+				}
+			}
+		})
+
+		/*
+		 * OCP Timer need to be disabled in SCS UFS IOSF Bridge to work around
+		 * the Silicon Issue due to which LTR mechanism doesn't work.
+		 * Registers from the UFS OCP Fabric register space that need to be
+		 * programmed for the timeout are:
+		 * Upstream Initiator Port  -- offset 0x4020
+		 * Downstream Target Port  -- offset 0x4820
+		 * Downstream Target port at Controller -- offset 0x5c20
+		 * Upstream Initiator port at Controller -- offset 0x5820
+		 * Control over interconnect-wide functions -- offset 0x1078
+		 */
+		Method (OCPD, 0, Serialized)
+		{
+			PCRA (PID_UFSX2, R_SCS_PCR_4020, 0x0)
+			PCRA (PID_UFSX2, R_SCS_PCR_4820, 0x0)
+			PCRA (PID_UFSX2, R_SCS_PCR_5C20, 0x0)
+			PCRA (PID_UFSX2, R_SCS_PCR_5820, 0x0)
+			PCRA (PID_UFSX2, R_SCS_PCR_1078, 0x0)
+		}
+
+		/* Memory Region to access to the UFS PCI Configuration Space */
+		OperationRegion(SCSR, PCI_Config, 0x00, 0x100)
+		Field (SCSR, ByteAcc, NoLock, Preserve)
+		{
+			/*	0x84, PMCSR - Power Management Control and Status*/
+			Offset(R_SCS_CFG_PCS),
+			PSTA,32,
+			/* 0xA2, Device PG config */
+			Offset(R_SCS_CFG_PG_CONFIG),
+			, 2,
+			/* [BIT2] PGE - PG Enable */
+			PGEN, 1
+		}
+
+		Method (_PS0, 0, Serialized)
+		{
+			/* Disable PG */
+			PGEN = 0
+
+			/* Set BIT[1:0] = 00b - Power State D0 */
+			PSTA &= 0xFFFFFFFC
+
+			/* Disable OCP Timer in SCS UFS IOSF Bridge */
+			OCPD ()
+		}
+
+		Method (_PS3, 0, Serialized)
+		{
+			/* Enable PG */
+			PGEN = 1
+		}
+
+		Method (_INI)
+		{
+			OCPD ()
+		}
+	}
+}