Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 204 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/hwesleep.c b/drivers/acpi/acpica/hwesleep.c
new file mode 100644
index 000000000..142a755be
--- /dev/null
+++ b/drivers/acpi/acpica/hwesleep.c
@@ -0,0 +1,204 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the
+ *                    extended FADT-V5 sleep registers.
+ *
+ * Copyright (C) 2000 - 2020, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+ACPI_MODULE_NAME("hwesleep")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_execute_sleep_method
+ *
+ * PARAMETERS:  method_pathname     - Pathname of method to execute
+ *              integer_argument    - Argument to pass to the method
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Execute a sleep/wake related method with one integer argument
+ *              and no return value.
+ *
+ ******************************************************************************/
+void acpi_hw_execute_sleep_method(char *method_pathname, u32 integer_argument)
+{
+	struct acpi_object_list arg_list;
+	union acpi_object arg;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(hw_execute_sleep_method);
+
+	/* One argument, integer_argument; No return value expected */
+
+	arg_list.count = 1;
+	arg_list.pointer = &arg;
+	arg.type = ACPI_TYPE_INTEGER;
+	arg.integer.value = (u64)integer_argument;
+
+	status = acpi_evaluate_object(NULL, method_pathname, &arg_list, NULL);
+	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+		ACPI_EXCEPTION((AE_INFO, status, "While executing method %s",
+				method_pathname));
+	}
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_extended_sleep
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state to enter
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enter a system sleep state via the extended FADT sleep
+ *              registers (V5 FADT).
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_extended_sleep(u8 sleep_state)
+{
+	acpi_status status;
+	u8 sleep_control;
+	u64 sleep_status;
+
+	ACPI_FUNCTION_TRACE(hw_extended_sleep);
+
+	/* Extended sleep registers must be valid */
+
+	if (!acpi_gbl_FADT.sleep_control.address ||
+	    !acpi_gbl_FADT.sleep_status.address) {
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	/* Clear wake status (WAK_STS) */
+
+	status = acpi_write((u64)ACPI_X_WAKE_STATUS,
+			    &acpi_gbl_FADT.sleep_status);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	acpi_gbl_system_awake_and_running = FALSE;
+
+	/*
+	 * Set the SLP_TYP and SLP_EN bits.
+	 *
+	 * Note: We only use the first value returned by the \_Sx method
+	 * (acpi_gbl_sleep_type_a) - As per ACPI specification.
+	 */
+	ACPI_DEBUG_PRINT((ACPI_DB_INIT,
+			  "Entering sleep state [S%u]\n", sleep_state));
+
+	sleep_control = ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) &
+			 ACPI_X_SLEEP_TYPE_MASK) | ACPI_X_SLEEP_ENABLE;
+
+	/* Flush caches, as per ACPI specification */
+
+	if (sleep_state < ACPI_STATE_S4) {
+		ACPI_FLUSH_CPU_CACHE();
+	}
+
+	status = acpi_os_enter_sleep(sleep_state, sleep_control, 0);
+	if (status == AE_CTRL_TERMINATE) {
+		return_ACPI_STATUS(AE_OK);
+	}
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	status = acpi_write((u64)sleep_control, &acpi_gbl_FADT.sleep_control);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Wait for transition back to Working State */
+
+	do {
+		status = acpi_read(&sleep_status, &acpi_gbl_FADT.sleep_status);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+
+	} while (!(((u8)sleep_status) & ACPI_X_WAKE_STATUS));
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_extended_wake_prep
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state we just exited
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform first part of OS-independent ACPI cleanup after
+ *              a sleep. Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_extended_wake_prep(u8 sleep_state)
+{
+	u8 sleep_type_value;
+
+	ACPI_FUNCTION_TRACE(hw_extended_wake_prep);
+
+	if (acpi_gbl_sleep_type_a_s0 != ACPI_SLEEP_TYPE_INVALID) {
+		sleep_type_value =
+		    ((acpi_gbl_sleep_type_a_s0 << ACPI_X_SLEEP_TYPE_POSITION) &
+		     ACPI_X_SLEEP_TYPE_MASK);
+
+		(void)acpi_write((u64)(sleep_type_value | ACPI_X_SLEEP_ENABLE),
+				 &acpi_gbl_FADT.sleep_control);
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_extended_wake
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state we just exited
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
+ *              Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_extended_wake(u8 sleep_state)
+{
+	ACPI_FUNCTION_TRACE(hw_extended_wake);
+
+	/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
+
+	acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
+
+	/* Execute the wake methods */
+
+	acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WAKING);
+	acpi_hw_execute_sleep_method(METHOD_PATHNAME__WAK, sleep_state);
+
+	/*
+	 * Some BIOS code assumes that WAK_STS will be cleared on resume
+	 * and use it to determine whether the system is rebooting or
+	 * resuming. Clear WAK_STS for compatibility.
+	 */
+	(void)acpi_write((u64)ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status);
+	acpi_gbl_system_awake_and_running = TRUE;
+
+	acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WORKING);
+	return_ACPI_STATUS(AE_OK);
+}