1 files changed, 431 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c
new file mode 100644
index 000000000000..762d059bb508
--- /dev/null
+++ b/drivers/acpi/acpica/hwxfsleep.c
@@ -0,0 +1,431 @@
+/******************************************************************************
+ *
+ * Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include <linux/module.h>
+
+#define _COMPONENT          ACPI_HARDWARE
+ACPI_MODULE_NAME("hwxfsleep")
+
+/* Local prototypes */
+static acpi_status
+acpi_hw_sleep_dispatch(u8 sleep_state, u8 flags, u32 function_id);
+
+/*
+ * Dispatch table used to efficiently branch to the various sleep
+ * functions.
+ */
+#define ACPI_SLEEP_FUNCTION_ID         0
+#define ACPI_WAKE_PREP_FUNCTION_ID     1
+#define ACPI_WAKE_FUNCTION_ID          2
+
+/* Legacy functions are optional, based upon ACPI_REDUCED_HARDWARE */
+
+static struct acpi_sleep_functions acpi_sleep_dispatch[] = {
+        {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_sleep),
+         acpi_hw_extended_sleep},
+        {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake_prep),
+         acpi_hw_extended_wake_prep},
+        {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake), acpi_hw_extended_wake}
+};
+
+/*
+ * These functions are removed for the ACPI_REDUCED_HARDWARE case:
+ *      acpi_set_firmware_waking_vector
+ *      acpi_set_firmware_waking_vector64
+ *      acpi_enter_sleep_state_s4bios
+ */
+
+#if (!ACPI_REDUCED_HARDWARE)
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_set_firmware_waking_vector
+ *
+ * PARAMETERS:  physical_address    - 32-bit physical address of ACPI real mode
+ *                                    entry point.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
+ *
+ ******************************************************************************/
+
+acpi_status acpi_set_firmware_waking_vector(u32 physical_address)
+{
+        ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
+
+
+        /*
+         * According to the ACPI specification 2.0c and later, the 64-bit
+         * waking vector should be cleared and the 32-bit waking vector should
+         * be used, unless we want the wake-up code to be called by the BIOS in
+         * Protected Mode.  Some systems (for example HP dv5-1004nr) are known
+         * to fail to resume if the 64-bit vector is used.
+         */
+
+        /* Set the 32-bit vector */
+
+        acpi_gbl_FACS->firmware_waking_vector = physical_address;
+
+        /* Clear the 64-bit vector if it exists */
+
+        if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) {
+                acpi_gbl_FACS->xfirmware_waking_vector = 0;
+        }
+
+        return_ACPI_STATUS(AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
+
+#if ACPI_MACHINE_WIDTH == 64
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_set_firmware_waking_vector64
+ *
+ * PARAMETERS:  physical_address    - 64-bit physical address of ACPI protected
+ *                                    mode entry point.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if
+ *              it exists in the table. This function is intended for use with
+ *              64-bit host operating systems.
+ *
+ ******************************************************************************/
+acpi_status acpi_set_firmware_waking_vector64(u64 physical_address)
+{
+        ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64);
+
+
+        /* Determine if the 64-bit vector actually exists */
+
+        if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) {
+                return_ACPI_STATUS(AE_NOT_EXIST);
+        }
+
+        /* Clear 32-bit vector, set the 64-bit X_ vector */
+
+        acpi_gbl_FACS->firmware_waking_vector = 0;
+        acpi_gbl_FACS->xfirmware_waking_vector = physical_address;
+        return_ACPI_STATUS(AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enter_sleep_state_s4bios
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform a S4 bios request.
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
+{
+        u32 in_value;
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
+
+        /* Clear the wake status bit (PM1) */
+
+        status =
+            acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        status = acpi_hw_clear_acpi_status();
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        /*
+         * 1) Disable/Clear all GPEs
+         * 2) Enable all wakeup GPEs
+         */
+        status = acpi_hw_disable_all_gpes();
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+        acpi_gbl_system_awake_and_running = FALSE;
+
+        status = acpi_hw_enable_all_wakeup_gpes();
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        ACPI_FLUSH_CPU_CACHE();
+
+        status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
+                                    (u32)acpi_gbl_FADT.S4bios_request, 8);
+
+        do {
+                acpi_os_stall(1000);
+                status =
+                    acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
+        } while (!in_value);
+
+        return_ACPI_STATUS(AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
+#endif                          /* !ACPI_REDUCED_HARDWARE */
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_sleep_dispatch
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state to enter/exit
+ *              function_id         - Sleep, wake_prep, or Wake
+ *
+ * RETURN:      Status from the invoked sleep handling function.
+ *
+ * DESCRIPTION: Dispatch a sleep/wake request to the appropriate handling
+ *              function.
+ *
+ ******************************************************************************/
+static acpi_status
+acpi_hw_sleep_dispatch(u8 sleep_state, u8 flags, u32 function_id)
+{
+        acpi_status status;
+        struct acpi_sleep_functions *sleep_functions =
+            &acpi_sleep_dispatch[function_id];
+
+#if (!ACPI_REDUCED_HARDWARE)
+
+        /*
+         * If the Hardware Reduced flag is set (from the FADT), we must
+         * use the extended sleep registers
+         */
+        if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
+                status = sleep_functions->extended_function(sleep_state, flags);
+        } else {
+                /* Legacy sleep */
+
+                status = sleep_functions->legacy_function(sleep_state, flags);
+        }
+
+        return (status);
+
+#else
+        /*
+         * For the case where reduced-hardware-only code is being generated,
+         * we know that only the extended sleep registers are available
+         */
+        status = sleep_functions->extended_function(sleep_state, flags);
+        return (status);
+
+#endif                          /* !ACPI_REDUCED_HARDWARE */
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enter_sleep_state_prep
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state to enter
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Prepare to enter a system sleep state.
+ *              This function must execute with interrupts enabled.
+ *              We break sleeping into 2 stages so that OSPM can handle
+ *              various OS-specific tasks between the two steps.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
+{
+        acpi_status status;
+        struct acpi_object_list arg_list;
+        union acpi_object arg;
+        u32 sst_value;
+
+        ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
+
+        status = acpi_get_sleep_type_data(sleep_state,
+                                          &acpi_gbl_sleep_type_a,
+                                          &acpi_gbl_sleep_type_b);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        /* Execute the _PTS method (Prepare To Sleep) */
+
+        arg_list.count = 1;
+        arg_list.pointer = &arg;
+        arg.type = ACPI_TYPE_INTEGER;
+        arg.integer.value = sleep_state;
+
+        status =
+            acpi_evaluate_object(NULL, METHOD_PATHNAME__PTS, &arg_list, NULL);
+        if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+                return_ACPI_STATUS(status);
+        }
+
+        /* Setup the argument to the _SST method (System STatus) */
+
+        switch (sleep_state) {
+        case ACPI_STATE_S0:
+                sst_value = ACPI_SST_WORKING;
+                break;
+
+        case ACPI_STATE_S1:
+        case ACPI_STATE_S2:
+        case ACPI_STATE_S3:
+                sst_value = ACPI_SST_SLEEPING;
+                break;
+
+        case ACPI_STATE_S4:
+                sst_value = ACPI_SST_SLEEP_CONTEXT;
+                break;
+
+        default:
+                sst_value = ACPI_SST_INDICATOR_OFF;     /* Default is off */
+                break;
+        }
+
+        /*
+         * Set the system indicators to show the desired sleep state.
+         * _SST is an optional method (return no error if not found)
+         */
+        acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, sst_value);
+        return_ACPI_STATUS(AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enter_sleep_state
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state to enter
+ *              Flags               - ACPI_EXECUTE_GTS to run optional method
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state, u8 flags)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
+
+        if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
+            (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
+                ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
+                            acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
+                return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
+        }
+
+        status =
+            acpi_hw_sleep_dispatch(sleep_state, flags, ACPI_SLEEP_FUNCTION_ID);
+        return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_leave_sleep_state_prep
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state we are exiting
+ *              Flags               - ACPI_EXECUTE_BFS to run optional method
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
+ *              sleep.
+ *              Called with interrupts DISABLED.
+ *
+ ******************************************************************************/
+acpi_status acpi_leave_sleep_state_prep(u8 sleep_state, u8 flags)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
+
+        status =
+            acpi_hw_sleep_dispatch(sleep_state, flags,
+                                   ACPI_WAKE_PREP_FUNCTION_ID);
+        return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state_prep)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_leave_sleep_state
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state we are exiting
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
+ *              Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+acpi_status acpi_leave_sleep_state(u8 sleep_state)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
+
+
+        status = acpi_hw_sleep_dispatch(sleep_state, 0, ACPI_WAKE_FUNCTION_ID);
+        return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)