diff options
Diffstat (limited to 'drivers/acpi/hardware/hwacpi.c')
| -rw-r--r-- | drivers/acpi/hardware/hwacpi.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/drivers/acpi/hardware/hwacpi.c b/drivers/acpi/hardware/hwacpi.c deleted file mode 100644 index 816894ea839e..000000000000 --- a/drivers/acpi/hardware/hwacpi.c +++ /dev/null @@ -1,184 +0,0 @@ - -/****************************************************************************** - * - * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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> - -#define _COMPONENT ACPI_HARDWARE -ACPI_MODULE_NAME("hwacpi") - -/****************************************************************************** - * - * FUNCTION: acpi_hw_set_mode - * - * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY - * - * RETURN: Status - * - * DESCRIPTION: Transitions the system into the requested mode. - * - ******************************************************************************/ -acpi_status acpi_hw_set_mode(u32 mode) -{ - - acpi_status status; - u32 retry; - - ACPI_FUNCTION_TRACE(hw_set_mode); - - /* - * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, - * system does not support mode transition. - */ - if (!acpi_gbl_FADT.smi_command) { - ACPI_ERROR((AE_INFO, - "No SMI_CMD in FADT, mode transition failed")); - return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); - } - - /* - * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE - * in FADT: If it is zero, enabling or disabling is not supported. - * As old systems may have used zero for mode transition, - * we make sure both the numbers are zero to determine these - * transitions are not supported. - */ - if (!acpi_gbl_FADT.acpi_enable && !acpi_gbl_FADT.acpi_disable) { - ACPI_ERROR((AE_INFO, - "No ACPI mode transition supported in this system (enable/disable both zero)")); - return_ACPI_STATUS(AE_OK); - } - - switch (mode) { - case ACPI_SYS_MODE_ACPI: - - /* BIOS should have disabled ALL fixed and GP events */ - - status = acpi_os_write_port(acpi_gbl_FADT.smi_command, - (u32) acpi_gbl_FADT.acpi_enable, 8); - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Attempting to enable ACPI mode\n")); - break; - - case ACPI_SYS_MODE_LEGACY: - - /* - * BIOS should clear all fixed status bits and restore fixed event - * enable bits to default - */ - status = acpi_os_write_port(acpi_gbl_FADT.smi_command, - (u32) acpi_gbl_FADT.acpi_disable, - 8); - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Attempting to enable Legacy (non-ACPI) mode\n")); - break; - - default: - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Could not write ACPI mode change")); - return_ACPI_STATUS(status); - } - - /* - * Some hardware takes a LONG time to switch modes. Give them 3 sec to - * do so, but allow faster systems to proceed more quickly. - */ - retry = 3000; - while (retry) { - if (acpi_hw_get_mode() == mode) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Mode %X successfully enabled\n", - mode)); - return_ACPI_STATUS(AE_OK); - } - acpi_os_stall(1000); - retry--; - } - - ACPI_ERROR((AE_INFO, "Hardware did not change modes")); - return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); -} - -/******************************************************************************* - * - * FUNCTION: acpi_hw_get_mode - * - * PARAMETERS: none - * - * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY - * - * DESCRIPTION: Return current operating state of system. Determined by - * querying the SCI_EN bit. - * - ******************************************************************************/ - -u32 acpi_hw_get_mode(void) -{ - acpi_status status; - u32 value; - - ACPI_FUNCTION_TRACE(hw_get_mode); - - /* - * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, - * system does not support mode transition. - */ - if (!acpi_gbl_FADT.smi_command) { - return_UINT32(ACPI_SYS_MODE_ACPI); - } - - status = acpi_get_register(ACPI_BITREG_SCI_ENABLE, &value); - if (ACPI_FAILURE(status)) { - return_UINT32(ACPI_SYS_MODE_LEGACY); - } - - if (value) { - return_UINT32(ACPI_SYS_MODE_ACPI); - } else { - return_UINT32(ACPI_SYS_MODE_LEGACY); - } -} |
