]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commitdiff
ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registers
authorBob Moore <robert.moore@intel.com>
Tue, 14 Feb 2012 07:00:53 +0000 (15:00 +0800)
committerLen Brown <len.brown@intel.com>
Thu, 22 Mar 2012 05:44:34 +0000 (01:44 -0400)
Adds sleep and wake support for systems with these registers.
One new file, hwxfsleep.c

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
drivers/acpi/acpica/Makefile
drivers/acpi/acpica/achware.h
drivers/acpi/acpica/hwsleep.c
drivers/acpi/acpica/hwxfsleep.c [new file with mode: 0644]
include/acpi/actbl.h

index 0ca208b6dcf099e4b012ed29efa0d564227f20c6..da5518063ef7e577da88fa552b07ae6ed88b5245 100644 (file)
@@ -73,7 +73,8 @@ acpi-y +=             \
        hwregs.o        \
        hwsleep.o       \
        hwvalid.o       \
-       hwxface.o
+       hwxface.o       \
+       hwxfsleep.o
 
 acpi-$(ACPI_FUTURE_USAGE) += hwtimer.o
 
index 677793e938f5d83e31241206724b58fec3e01630..087f7106412dd685638d06cc1d0e9699ae16d1e3 100644 (file)
@@ -80,6 +80,23 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value);
 
 acpi_status acpi_hw_clear_acpi_status(void);
 
+/*
+ * hwsleep - sleep/wake support
+ */
+void acpi_hw_execute_SST(u32 value);
+
+acpi_status acpi_hw_extended_sleep(u8 sleep_state);
+
+acpi_status acpi_hw_legacy_sleep(u8 sleep_state);
+
+acpi_status acpi_hw_extended_wake_prep(u8 sleep_state);
+
+acpi_status acpi_hw_extended_wake(u8 sleep_state);
+
+acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state);
+
+acpi_status acpi_hw_legacy_wake(u8 sleep_state);
+
 /*
  * hwvalid - Port I/O with validation
  */
index 3c4a922a9fc2810b607e47ffd3d799277ffcea5e..59a2a6b897d40ea1dc2e5c5d8256e7e3aa0303be 100644 (file)
@@ -1,7 +1,6 @@
-
 /******************************************************************************
  *
- * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
+ * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support Functions
  *
  *****************************************************************************/
 
 
 #include <acpi/acpi.h>
 #include "accommon.h"
-#include "actables.h"
 #include <linux/tboot.h>
 #include <linux/module.h>
 
 #define _COMPONENT          ACPI_HARDWARE
 ACPI_MODULE_NAME("hwsleep")
 
+/* Local prototypes */
+static void acpi_hw_execute_GTS(u8 sleep_state);
+
+static void acpi_hw_execute_BFS(u8 sleep_state);
+
+static void acpi_hw_execute_WAK(u8 sleep_state);
+
+static unsigned int gts, bfs;
+module_param(gts, uint, 0644);
+module_param(bfs, uint, 0644);
+MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
+MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
+
 /*******************************************************************************
  *
- * FUNCTION:    acpi_set_firmware_waking_vector
+ * FUNCTION:    acpi_hw_execute_GTS
  *
- * PARAMETERS:  physical_address    - 32-bit physical address of ACPI real mode
- *                                    entry point.
+ * PARAMETERS:  sleep_state         - Sleep state that will be entered
  *
- * RETURN:      Status
+ * RETURN:      None
  *
- * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
+ * DESCRIPTION: Execute the optional _GTS method (Going To Sleep)
  *
  ******************************************************************************/
-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.
-        */
+static void acpi_hw_execute_GTS(u8 sleep_state)
+{
+       struct acpi_object_list arg_list;
+       union acpi_object arg;
+       acpi_status status;
 
-       /* Set the 32-bit vector */
+       if (!gts)
+               return;
 
-       acpi_gbl_FACS->firmware_waking_vector = physical_address;
+       /* One argument, sleep_state */
 
-       /* Clear the 64-bit vector if it exists */
+       arg_list.count = 1;
+       arg_list.pointer = &arg;
+       arg.type = ACPI_TYPE_INTEGER;
+       arg.integer.value = sleep_state;
 
-       if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) {
-               acpi_gbl_FACS->xfirmware_waking_vector = 0;
+       status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
+       if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+               ACPI_EXCEPTION((AE_INFO, status,
+                               "While executing method _GTS"));
        }
-
-       return_ACPI_STATUS(AE_OK);
 }
 
-ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
-
-#if ACPI_MACHINE_WIDTH == 64
 /*******************************************************************************
  *
- * FUNCTION:    acpi_set_firmware_waking_vector64
+ * FUNCTION:    acpi_hw_execute_BFS
  *
- * PARAMETERS:  physical_address    - 64-bit physical address of ACPI protected
- *                                    mode entry point.
+ * PARAMETERS:  sleep_state         - Which sleep state we just exited
  *
- * RETURN:      Status
+ * RETURN:      None
  *
- * 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.
+ * DESCRIPTION: Execute the optional _BFS method (Back From Sleep)
  *
  ******************************************************************************/
-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 */
+static void acpi_hw_execute_BFS(u8 sleep_state)
+{
+       struct acpi_object_list arg_list;
+       union acpi_object arg;
+       acpi_status status;
 
-       if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) {
-               return_ACPI_STATUS(AE_NOT_EXIST);
-       }
+       if (!bfs)
+               return;
 
-       /* Clear 32-bit vector, set the 64-bit X_ vector */
+       /* One argument, sleep_state */
 
-       acpi_gbl_FACS->firmware_waking_vector = 0;
-       acpi_gbl_FACS->xfirmware_waking_vector = physical_address;
+       arg_list.count = 1;
+       arg_list.pointer = &arg;
+       arg.type = ACPI_TYPE_INTEGER;
+       arg.integer.value = sleep_state;
 
-       return_ACPI_STATUS(AE_OK);
+       status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
+       if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+               ACPI_EXCEPTION((AE_INFO, status,
+                               "While executing method _BFS"));
+       }
 }
 
-ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
-#endif
-
 /*******************************************************************************
  *
- * FUNCTION:    acpi_enter_sleep_state_prep
+ * FUNCTION:    acpi_hw_execute_WAK
  *
- * PARAMETERS:  sleep_state         - Which sleep state to enter
+ * PARAMETERS:  sleep_state         - Which sleep state we just exited
  *
- * RETURN:      Status
+ * RETURN:      None
  *
- * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
- *              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.
+ * DESCRIPTION: Execute the _WAK method (System Wake)
  *
  ******************************************************************************/
-acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
+
+static void acpi_hw_execute_WAK(u8 sleep_state)
 {
-       acpi_status status;
        struct acpi_object_list arg_list;
        union acpi_object arg;
+       acpi_status status;
 
-       ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
-
-       /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
-
-       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);
-       }
-
-       /* Setup parameter object */
+       /* One argument, sleep_state */
 
        arg_list.count = 1;
        arg_list.pointer = &arg;
-
        arg.type = ACPI_TYPE_INTEGER;
        arg.integer.value = sleep_state;
 
-       /* Run the _PTS method */
-
-       status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
+       status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
        if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-               return_ACPI_STATUS(status);
+               ACPI_EXCEPTION((AE_INFO, status,
+                               "While executing method _WAK"));
        }
+       /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
+}
 
-       /* Setup the argument to _SST */
-
-       switch (sleep_state) {
-       case ACPI_STATE_S0:
-               arg.integer.value = ACPI_SST_WORKING;
-               break;
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_execute_SST
+ *
+ * PARAMETERS:  indicator_id        - Value to be passed to the _SST method
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Execute the optional _SST method (System Status)
+ *
+ ******************************************************************************/
 
-       case ACPI_STATE_S1:
-       case ACPI_STATE_S2:
-       case ACPI_STATE_S3:
-               arg.integer.value = ACPI_SST_SLEEPING;
-               break;
+void acpi_hw_execute_SST(u32 indicator_id)
+{
+       struct acpi_object_list arg_list;
+       union acpi_object arg;
+       acpi_status status;
 
-       case ACPI_STATE_S4:
-               arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
-               break;
+       /* One argument, status indicator ID */
 
-       default:
-               arg.integer.value = ACPI_SST_INDICATOR_OFF;     /* Default is off */
-               break;
-       }
+       arg_list.count = 1;
+       arg_list.pointer = &arg;
+       arg.type = ACPI_TYPE_INTEGER;
 
-       /*
-        * Set the system indicators to show the desired sleep state.
-        * _SST is an optional method (return no error if not found)
-        */
+       arg.integer.value = indicator_id;
        status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
        if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
                ACPI_EXCEPTION((AE_INFO, status,
                                "While executing method _SST"));
        }
-
-       return_ACPI_STATUS(AE_OK);
 }
 
-ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
-
-static unsigned int gts, bfs;
-module_param(gts, uint, 0644);
-module_param(bfs, uint, 0644);
-MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
-MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
-
 /*******************************************************************************
  *
- * FUNCTION:    acpi_enter_sleep_state
+ * FUNCTION:    acpi_hw_legacy_sleep
  *
  * PARAMETERS:  sleep_state         - Which sleep state to enter
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
+ * DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers
  *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
  *
  ******************************************************************************/
-acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
+
+acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
 {
-       u32 pm1a_control;
-       u32 pm1b_control;
        struct acpi_bit_register_info *sleep_type_reg_info;
        struct acpi_bit_register_info *sleep_enable_reg_info;
+       u32 pm1a_control;
+       u32 pm1b_control;
        u32 in_value;
-       struct acpi_object_list arg_list;
-       union acpi_object arg;
        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);
-       }
+       ACPI_FUNCTION_TRACE(hw_legacy_sleep);
 
        sleep_type_reg_info =
            acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE);
@@ -271,6 +241,18 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
                return_ACPI_STATUS(status);
        }
 
+       if (sleep_state != ACPI_STATE_S5) {
+               /*
+                * Disable BM arbitration. This feature is contained within an
+                * optional register (PM2 Control), so ignore a BAD_ADDRESS
+                * exception.
+                */
+               status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1);
+               if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) {
+                       return_ACPI_STATUS(status);
+               }
+       }
+
        /*
         * 1) Disable/Clear all GPEs
         * 2) Enable all wakeup GPEs
@@ -286,19 +268,9 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
                return_ACPI_STATUS(status);
        }
 
-       if (gts) {
-               /* Execute the _GTS method */
+       /* Execute the _GTS method (Going 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_NAME__GTS, &arg_list, NULL);
-               if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-                       return_ACPI_STATUS(status);
-               }
-       }
+       acpi_hw_execute_GTS(sleep_state);
 
        /* Get current value of PM1A control */
 
@@ -375,114 +347,43 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
                }
        }
 
-       /* Wait until we enter sleep state */
-
-       do {
-               status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS,
-                                                   &in_value);
-               if (ACPI_FAILURE(status)) {
-                       return_ACPI_STATUS(status);
-               }
-
-               /* Spin until we wake */
-
-       } while (!in_value);
-
-       return_ACPI_STATUS(AE_OK);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
-
-/*******************************************************************************
- *
- * 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);
+       /* Wait for transition back to Working State */
 
        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)
-
 /*******************************************************************************
  *
- * FUNCTION:    acpi_leave_sleep_state_prep
+ * FUNCTION:    acpi_hw_legacy_wake_prep
  *
- * PARAMETERS:  sleep_state         - Which sleep state we are exiting
+ * PARAMETERS:  sleep_state         - Which sleep state we just exited
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
  *              sleep.
- *              Called with interrupts DISABLED.
+ *              Called with interrupts ENABLED.
  *
  ******************************************************************************/
-acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
+
+acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
 {
-       struct acpi_object_list arg_list;
-       union acpi_object arg;
        acpi_status status;
        struct acpi_bit_register_info *sleep_type_reg_info;
        struct acpi_bit_register_info *sleep_enable_reg_info;
        u32 pm1a_control;
        u32 pm1b_control;
 
-       ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
+       ACPI_FUNCTION_TRACE(hw_legacy_wake_prep);
 
        /*
         * Set SLP_TYPE and SLP_EN to state S0.
@@ -525,25 +426,13 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
                }
        }
 
-       if (bfs) {
-               /* Execute the _BFS method */
-
-               arg_list.count = 1;
-               arg_list.pointer = &arg;
-               arg.type = ACPI_TYPE_INTEGER;
-               arg.integer.value = sleep_state;
-
-               status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
-               if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-                       ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
-               }
-       }
+       acpi_hw_execute_BFS(sleep_state);
        return_ACPI_STATUS(status);
 }
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_leave_sleep_state
+ * FUNCTION:    acpi_hw_legacy_wake
  *
  * PARAMETERS:  sleep_state         - Which sleep state we just exited
  *
@@ -553,31 +442,17 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
  *              Called with interrupts ENABLED.
  *
  ******************************************************************************/
-acpi_status acpi_leave_sleep_state(u8 sleep_state)
+
+acpi_status acpi_hw_legacy_wake(u8 sleep_state)
 {
-       struct acpi_object_list arg_list;
-       union acpi_object arg;
        acpi_status status;
 
-       ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
+       ACPI_FUNCTION_TRACE(hw_legacy_wake);
 
        /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
 
        acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
-
-       /* Setup parameter object */
-
-       arg_list.count = 1;
-       arg_list.pointer = &arg;
-       arg.type = ACPI_TYPE_INTEGER;
-
-       /* Ignore any errors from these methods */
-
-       arg.integer.value = ACPI_SST_WAKING;
-       status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
-       if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-               ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
-       }
+       acpi_hw_execute_SST(ACPI_SST_WAKING);
 
        /*
         * GPEs must be enabled before _WAK is called as GPEs
@@ -591,46 +466,201 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
+
        status = acpi_hw_enable_all_runtime_gpes();
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
 
-       arg.integer.value = sleep_state;
-       status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
-       if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-               ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK"));
-       }
-       /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
+       /*
+        * Now we can execute _WAK, etc. Some machines require that the GPEs
+        * are enabled before the wake methods are executed.
+        */
+       acpi_hw_execute_WAK(sleep_state);
 
        /*
-        * Some BIOSes assume that WAK_STS will be cleared on resume and use
-        * it to determine whether the system is rebooting or resuming. Clear
-        * it for compatibility.
+        * 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.
         */
        acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1);
-
        acpi_gbl_system_awake_and_running = TRUE;
 
        /* Enable power button */
 
        (void)
            acpi_write_bit_register(acpi_gbl_fixed_event_info
-                             [ACPI_EVENT_POWER_BUTTON].
-                             enable_register_id, ACPI_ENABLE_EVENT);
+                                   [ACPI_EVENT_POWER_BUTTON].
+                                   enable_register_id, ACPI_ENABLE_EVENT);
 
        (void)
            acpi_write_bit_register(acpi_gbl_fixed_event_info
-                             [ACPI_EVENT_POWER_BUTTON].
-                             status_register_id, ACPI_CLEAR_STATUS);
+                                   [ACPI_EVENT_POWER_BUTTON].
+                                   status_register_id, ACPI_CLEAR_STATUS);
 
-       arg.integer.value = ACPI_SST_WORKING;
-       status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
-       if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-               ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
+       /*
+        * Enable BM arbitration. This feature is contained within an
+        * optional register (PM2 Control), so ignore a BAD_ADDRESS
+        * exception.
+        */
+       status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);
+       if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) {
+               return_ACPI_STATUS(status);
        }
 
+       acpi_hw_execute_SST(ACPI_SST_WORKING);
        return_ACPI_STATUS(status);
 }
 
-ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)
+
+/*******************************************************************************
+ *
+ * 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_type_value;
+       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(ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status);
+       if (ACPI_FAILURE(status)) {
+               return_ACPI_STATUS(status);
+       }
+
+       acpi_gbl_system_awake_and_running = FALSE;
+
+       /* Execute the _GTS method (Going To Sleep) */
+
+       acpi_hw_execute_GTS(sleep_state);
+
+       /* Flush caches, as per ACPI specification */
+
+       ACPI_FLUSH_CPU_CACHE();
+
+       /*
+        * 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_type_value =
+           ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) &
+            ACPI_X_SLEEP_TYPE_MASK);
+
+       status = acpi_write((sleep_type_value | ACPI_X_SLEEP_ENABLE),
+                           &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)
+{
+       acpi_status status;
+       u8 sleep_type_value;
+
+       ACPI_FUNCTION_TRACE(hw_extended_wake_prep);
+
+       status = acpi_get_sleep_type_data(ACPI_STATE_S0,
+                                         &acpi_gbl_sleep_type_a,
+                                         &acpi_gbl_sleep_type_b);
+       if (ACPI_SUCCESS(status)) {
+               sleep_type_value =
+                   ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) &
+                    ACPI_X_SLEEP_TYPE_MASK);
+
+               (void)acpi_write((sleep_type_value | ACPI_X_SLEEP_ENABLE),
+                                &acpi_gbl_FADT.sleep_control);
+       }
+
+       acpi_hw_execute_BFS(sleep_state);
+       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_SST(ACPI_SST_WAKING);
+       acpi_hw_execute_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(ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status);
+       acpi_gbl_system_awake_and_running = TRUE;
+
+       acpi_hw_execute_SST(ACPI_SST_WORKING);
+       return_ACPI_STATUS(AE_OK);
+}
diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c
new file mode 100644 (file)
index 0000000..29c0fd3
--- /dev/null
@@ -0,0 +1,377 @@
+/******************************************************************************
+ *
+ * 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")
+
+/*******************************************************************************
+ *
+ * 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)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enter_sleep_state_prep
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state to enter
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
+ *              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);
+
+       /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
+
+       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_NAME__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_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
+ *
+ * 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)
+{
+       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);
+       }
+
+       /* If Hardware Reduced flag is set, must use the extended sleep registers */
+
+       if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
+               status = acpi_hw_extended_sleep(sleep_state);
+       } else {
+               /* Legacy sleep */
+
+               status = acpi_hw_legacy_sleep(sleep_state);
+       }
+
+       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
+ *
+ * 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)
+{
+       acpi_status status;
+
+       ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
+
+
+       /* If Hardware Reduced flag is set, must use the extended sleep registers */
+
+       if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
+               status = acpi_hw_extended_wake_prep(sleep_state);
+       } else {
+               /* Legacy sleep */
+
+               status = acpi_hw_legacy_wake_prep(sleep_state);
+       }
+
+
+       return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state_prep)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_leave_sleep_state
+ *
+ * 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_leave_sleep_state(u8 sleep_state)
+{
+       acpi_status status;
+
+       ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
+
+
+       /* If Hardware Reduced flag is set, must use the extended sleep registers */
+
+       if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
+               status = acpi_hw_extended_wake(sleep_state);
+       } else {
+               /* Legacy sleep */
+
+               status = acpi_hw_legacy_wake(sleep_state);
+       }
+
+       return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)
index 8e1b92f6f650332e6130486d6b7e7a5bd3f1b3f8..8dea54665dcf35b4c0bfdcd63b6920881d32e699 100644 (file)
@@ -309,6 +309,13 @@ enum acpi_prefered_pm_profiles {
        PM_TABLET = 8
 };
 
+/* Values for sleep_status and sleep_control registers (V5 FADT) */
+
+#define ACPI_X_WAKE_STATUS          0x80
+#define ACPI_X_SLEEP_TYPE_MASK      0x1C
+#define ACPI_X_SLEEP_TYPE_POSITION  0x02
+#define ACPI_X_SLEEP_ENABLE         0x20
+
 /* Reset to default packing */
 
 #pragma pack()