diff options
Diffstat (limited to 'drivers/acpi/hardware/hwsleep.c')
| -rw-r--r-- | drivers/acpi/hardware/hwsleep.c | 582 |
1 files changed, 582 insertions, 0 deletions
diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c new file mode 100644 index 000000000000..77b3e9a8550b --- /dev/null +++ b/drivers/acpi/hardware/hwsleep.c @@ -0,0 +1,582 @@ + +/****************************************************************************** + * + * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * 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 <linux/module.h> + +#include <acpi/acpi.h> + +#define _COMPONENT ACPI_HARDWARE + ACPI_MODULE_NAME ("hwsleep") + + +#define METHOD_NAME__BFS "\\_BFS" +#define METHOD_NAME__GTS "\\_GTS" +#define METHOD_NAME__PTS "\\_PTS" +#define METHOD_NAME__SST "\\_SI._SST" +#define METHOD_NAME__WAK "\\_WAK" + +#define ACPI_SST_INDICATOR_OFF 0 +#define ACPI_SST_WORKING 1 +#define ACPI_SST_WAKING 2 +#define ACPI_SST_SLEEPING 3 +#define ACPI_SST_SLEEP_CONTEXT 4 + + +/****************************************************************************** + * + * FUNCTION: acpi_set_firmware_waking_vector + * + * PARAMETERS: physical_address - Physical address of ACPI real mode + * entry point. + * + * RETURN: Status + * + * DESCRIPTION: access function for d_firmware_waking_vector field in FACS + * + ******************************************************************************/ + +acpi_status +acpi_set_firmware_waking_vector ( + acpi_physical_address physical_address) +{ + + ACPI_FUNCTION_TRACE ("acpi_set_firmware_waking_vector"); + + + /* Set the vector */ + + if (acpi_gbl_common_fACS.vector_width == 32) { + *(ACPI_CAST_PTR (u32, acpi_gbl_common_fACS.firmware_waking_vector)) + = (u32) physical_address; + } + else { + *acpi_gbl_common_fACS.firmware_waking_vector + = physical_address; + } + + return_ACPI_STATUS (AE_OK); +} + + +/****************************************************************************** + * + * FUNCTION: acpi_get_firmware_waking_vector + * + * PARAMETERS: *physical_address - Output buffer where contents of + * the firmware_waking_vector field of + * the FACS will be stored. + * + * RETURN: Status + * + * DESCRIPTION: Access function for firmware_waking_vector field in FACS + * + ******************************************************************************/ +#ifdef ACPI_FUTURE_USAGE +acpi_status +acpi_get_firmware_waking_vector ( + acpi_physical_address *physical_address) +{ + + ACPI_FUNCTION_TRACE ("acpi_get_firmware_waking_vector"); + + + if (!physical_address) { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* Get the vector */ + + if (acpi_gbl_common_fACS.vector_width == 32) { + *physical_address = (acpi_physical_address) + *(ACPI_CAST_PTR (u32, acpi_gbl_common_fACS.firmware_waking_vector)); + } + else { + *physical_address = + *acpi_gbl_common_fACS.firmware_waking_vector; + } + + return_ACPI_STATUS (AE_OK); +} +#endif + + +/****************************************************************************** + * + * 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; + + + 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 */ + + arg_list.count = 1; + arg_list.pointer = &arg; + + arg.type = ACPI_TYPE_INTEGER; + arg.integer.value = sleep_state; + + /* Run the _PTS and _GTS methods */ + + status = acpi_evaluate_object (NULL, METHOD_NAME__PTS, &arg_list, NULL); + if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) { + return_ACPI_STATUS (status); + } + + status = acpi_evaluate_object (NULL, METHOD_NAME__GTS, &arg_list, NULL); + if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) { + return_ACPI_STATUS (status); + } + + /* Setup the argument to _SST */ + + switch (sleep_state) { + case ACPI_STATE_S0: + arg.integer.value = ACPI_SST_WORKING; + break; + + case ACPI_STATE_S1: + case ACPI_STATE_S2: + case ACPI_STATE_S3: + arg.integer.value = ACPI_SST_SLEEPING; + break; + + case ACPI_STATE_S4: + arg.integer.value = ACPI_SST_SLEEP_CONTEXT; + break; + + default: + arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is indicator off */ + break; + } + + /* Set the system indicators to show the desired sleep state. */ + + status = acpi_evaluate_object (NULL, METHOD_NAME__SST, &arg_list, NULL); + if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) { + ACPI_REPORT_ERROR (("Method _SST failed, %s\n", acpi_format_exception (status))); + } + + return_ACPI_STATUS (AE_OK); +} + + +/****************************************************************************** + * + * 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) +{ + u32 PM1Acontrol; + u32 PM1Bcontrol; + struct acpi_bit_register_info *sleep_type_reg_info; + struct acpi_bit_register_info *sleep_enable_reg_info; + u32 in_value; + 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_REPORT_ERROR (("Sleep values out of range: A=%X B=%X\n", + acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b)); + return_ACPI_STATUS (AE_AML_OPERAND_VALUE); + } + + sleep_type_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_TYPE_A); + sleep_enable_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_ENABLE); + + /* Clear wake status */ + + status = acpi_set_register (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Clear all fixed and general purpose status bits */ + + status = acpi_hw_clear_acpi_status (ACPI_MTX_DO_NOT_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* + * 1) Disable/Clear all GPEs + * 2) Enable all wakeup GPEs + */ + status = acpi_hw_disable_all_gpes (ACPI_ISR); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + acpi_gbl_system_awake_and_running = FALSE; + + status = acpi_hw_enable_all_wakeup_gpes (ACPI_ISR); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Get current value of PM1A control */ + + status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Entering sleep state [S%d]\n", sleep_state)); + + /* Clear SLP_EN and SLP_TYP fields */ + + PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | sleep_enable_reg_info->access_bit_mask); + PM1Bcontrol = PM1Acontrol; + + /* Insert SLP_TYP bits */ + + PM1Acontrol |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); + PM1Bcontrol |= (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); + + /* + * We split the writes of SLP_TYP and SLP_EN to workaround + * poorly implemented hardware. + */ + + /* Write #1: fill in SLP_TYP data */ + + status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Insert SLP_ENABLE bit */ + + PM1Acontrol |= sleep_enable_reg_info->access_bit_mask; + PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask; + + /* Write #2: SLP_TYP + SLP_EN */ + + ACPI_FLUSH_CPU_CACHE (); + + status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + if (sleep_state > ACPI_STATE_S3) { + /* + * We wanted to sleep > S3, but it didn't happen (by virtue of the fact that + * we are still executing!) + * + * Wait ten seconds, then try again. This is to get S4/S5 to work on all machines. + * + * We wait so long to allow chipsets that poll this reg very slowly to + * still read the right value. Ideally, this block would go + * away entirely. + */ + acpi_os_stall (10000000); + + status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_CONTROL, + sleep_enable_reg_info->access_bit_mask); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* Wait until we enter sleep state */ + + do { + status = acpi_get_register (ACPI_BITREG_WAKE_STATUS, &in_value, ACPI_MTX_DO_NOT_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Spin until we wake */ + + } while (!in_value); + + return_ACPI_STATUS (AE_OK); +} +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"); + + + status = acpi_set_register (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + status = acpi_hw_clear_acpi_status (ACPI_MTX_DO_NOT_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* + * 1) Disable/Clear all GPEs + * 2) Enable all wakeup GPEs + */ + status = acpi_hw_disable_all_gpes (ACPI_ISR); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + acpi_gbl_system_awake_and_running = FALSE; + + status = acpi_hw_enable_all_wakeup_gpes (ACPI_ISR); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + ACPI_FLUSH_CPU_CACHE (); + + status = acpi_os_write_port (acpi_gbl_FADT->smi_cmd, (u32) acpi_gbl_FADT->S4bios_req, 8); + + do { + acpi_os_stall(1000); + status = acpi_get_register (ACPI_BITREG_WAKE_STATUS, &in_value, ACPI_MTX_DO_NOT_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } while (!in_value); + + return_ACPI_STATUS (AE_OK); +} +EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios); + + +/****************************************************************************** + * + * 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) +{ + 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 PM1Acontrol; + u32 PM1Bcontrol; + + + ACPI_FUNCTION_TRACE ("acpi_leave_sleep_state"); + + + /* + * Set SLP_TYPE and SLP_EN to state S0. + * This is unclear from the ACPI Spec, but it is required + * by some machines. + */ + 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_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_TYPE_A); + sleep_enable_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_ENABLE); + + /* Get current value of PM1A control */ + + status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK, + ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol); + if (ACPI_SUCCESS (status)) { + /* Clear SLP_EN and SLP_TYP fields */ + + PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | + sleep_enable_reg_info->access_bit_mask); + PM1Bcontrol = PM1Acontrol; + + /* Insert SLP_TYP bits */ + + PM1Acontrol |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); + PM1Bcontrol |= (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); + + /* Just ignore any errors */ + + (void) acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, + ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol); + (void) acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, + ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol); + } + } + + /* 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_REPORT_ERROR (("Method _SST failed, %s\n", acpi_format_exception (status))); + } + + 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_REPORT_ERROR (("Method _BFS failed, %s\n", acpi_format_exception (status))); + } + + status = acpi_evaluate_object (NULL, METHOD_NAME__WAK, &arg_list, NULL); + if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) { + ACPI_REPORT_ERROR (("Method _WAK failed, %s\n", acpi_format_exception (status))); + } + /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ + + /* + * Restore the GPEs: + * 1) Disable/Clear all GPEs + * 2) Enable all runtime GPEs + */ + status = acpi_hw_disable_all_gpes (ACPI_NOT_ISR); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + acpi_gbl_system_awake_and_running = TRUE; + + status = acpi_hw_enable_all_runtime_gpes (ACPI_NOT_ISR); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Enable power button */ + + (void) acpi_set_register(acpi_gbl_fixed_event_info[ACPI_EVENT_POWER_BUTTON].enable_register_id, + 1, ACPI_MTX_DO_NOT_LOCK); + (void) acpi_set_register(acpi_gbl_fixed_event_info[ACPI_EVENT_POWER_BUTTON].status_register_id, + 1, ACPI_MTX_DO_NOT_LOCK); + + 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_REPORT_ERROR (("Method _SST failed, %s\n", acpi_format_exception (status))); + } + + return_ACPI_STATUS (status); +} |