hwacpi.c revision 1.1.1.2.2.2
1 1.1.1.2.2.2 bouyer 2 1.1.1.2.2.2 bouyer /****************************************************************************** 3 1.1.1.2.2.2 bouyer * 4 1.1.1.2.2.2 bouyer * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface 5 1.1.1.2.2.2 bouyer * 6 1.1.1.2.2.2 bouyer *****************************************************************************/ 7 1.1.1.2.2.2 bouyer 8 1.1.1.2.2.2 bouyer /* 9 1.1.1.2.2.2 bouyer * Copyright (C) 2000 - 2011, Intel Corp. 10 1.1.1.2.2.2 bouyer * All rights reserved. 11 1.1.1.2.2.2 bouyer * 12 1.1.1.2.2.2 bouyer * Redistribution and use in source and binary forms, with or without 13 1.1.1.2.2.2 bouyer * modification, are permitted provided that the following conditions 14 1.1.1.2.2.2 bouyer * are met: 15 1.1.1.2.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 16 1.1.1.2.2.2 bouyer * notice, this list of conditions, and the following disclaimer, 17 1.1.1.2.2.2 bouyer * without modification. 18 1.1.1.2.2.2 bouyer * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 1.1.1.2.2.2 bouyer * substantially similar to the "NO WARRANTY" disclaimer below 20 1.1.1.2.2.2 bouyer * ("Disclaimer") and any redistribution must be conditioned upon 21 1.1.1.2.2.2 bouyer * including a substantially similar Disclaimer requirement for further 22 1.1.1.2.2.2 bouyer * binary redistribution. 23 1.1.1.2.2.2 bouyer * 3. Neither the names of the above-listed copyright holders nor the names 24 1.1.1.2.2.2 bouyer * of any contributors may be used to endorse or promote products derived 25 1.1.1.2.2.2 bouyer * from this software without specific prior written permission. 26 1.1.1.2.2.2 bouyer * 27 1.1.1.2.2.2 bouyer * Alternatively, this software may be distributed under the terms of the 28 1.1.1.2.2.2 bouyer * GNU General Public License ("GPL") version 2 as published by the Free 29 1.1.1.2.2.2 bouyer * Software Foundation. 30 1.1.1.2.2.2 bouyer * 31 1.1.1.2.2.2 bouyer * NO WARRANTY 32 1.1.1.2.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 1.1.1.2.2.2 bouyer * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 1.1.1.2.2.2 bouyer * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 1.1.1.2.2.2 bouyer * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 1.1.1.2.2.2 bouyer * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 1.1.1.2.2.2 bouyer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 1.1.1.2.2.2 bouyer * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 1.1.1.2.2.2 bouyer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 1.1.1.2.2.2 bouyer * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 1.1.1.2.2.2 bouyer * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 1.1.1.2.2.2 bouyer * POSSIBILITY OF SUCH DAMAGES. 43 1.1.1.2.2.2 bouyer */ 44 1.1.1.2.2.2 bouyer 45 1.1.1.2.2.2 bouyer #define __HWACPI_C__ 46 1.1.1.2.2.2 bouyer 47 1.1.1.2.2.2 bouyer #include "acpi.h" 48 1.1.1.2.2.2 bouyer #include "accommon.h" 49 1.1.1.2.2.2 bouyer 50 1.1.1.2.2.2 bouyer 51 1.1.1.2.2.2 bouyer #define _COMPONENT ACPI_HARDWARE 52 1.1.1.2.2.2 bouyer ACPI_MODULE_NAME ("hwacpi") 53 1.1.1.2.2.2 bouyer 54 1.1.1.2.2.2 bouyer 55 1.1.1.2.2.2 bouyer /****************************************************************************** 56 1.1.1.2.2.2 bouyer * 57 1.1.1.2.2.2 bouyer * FUNCTION: AcpiHwSetMode 58 1.1.1.2.2.2 bouyer * 59 1.1.1.2.2.2 bouyer * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY 60 1.1.1.2.2.2 bouyer * 61 1.1.1.2.2.2 bouyer * RETURN: Status 62 1.1.1.2.2.2 bouyer * 63 1.1.1.2.2.2 bouyer * DESCRIPTION: Transitions the system into the requested mode. 64 1.1.1.2.2.2 bouyer * 65 1.1.1.2.2.2 bouyer ******************************************************************************/ 66 1.1.1.2.2.2 bouyer 67 1.1.1.2.2.2 bouyer ACPI_STATUS 68 1.1.1.2.2.2 bouyer AcpiHwSetMode ( 69 1.1.1.2.2.2 bouyer UINT32 Mode) 70 1.1.1.2.2.2 bouyer { 71 1.1.1.2.2.2 bouyer 72 1.1.1.2.2.2 bouyer ACPI_STATUS Status; 73 1.1.1.2.2.2 bouyer UINT32 Retry; 74 1.1.1.2.2.2 bouyer 75 1.1.1.2.2.2 bouyer 76 1.1.1.2.2.2 bouyer ACPI_FUNCTION_TRACE (HwSetMode); 77 1.1.1.2.2.2 bouyer 78 1.1.1.2.2.2 bouyer /* 79 1.1.1.2.2.2 bouyer * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 80 1.1.1.2.2.2 bouyer * system does not support mode transition. 81 1.1.1.2.2.2 bouyer */ 82 1.1.1.2.2.2 bouyer if (!AcpiGbl_FADT.SmiCommand) 83 1.1.1.2.2.2 bouyer { 84 1.1.1.2.2.2 bouyer ACPI_ERROR ((AE_INFO, "No SMI_CMD in FADT, mode transition failed")); 85 1.1.1.2.2.2 bouyer return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 86 1.1.1.2.2.2 bouyer } 87 1.1.1.2.2.2 bouyer 88 1.1.1.2.2.2 bouyer /* 89 1.1.1.2.2.2 bouyer * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE 90 1.1.1.2.2.2 bouyer * in FADT: If it is zero, enabling or disabling is not supported. 91 1.1.1.2.2.2 bouyer * As old systems may have used zero for mode transition, 92 1.1.1.2.2.2 bouyer * we make sure both the numbers are zero to determine these 93 1.1.1.2.2.2 bouyer * transitions are not supported. 94 1.1.1.2.2.2 bouyer */ 95 1.1.1.2.2.2 bouyer if (!AcpiGbl_FADT.AcpiEnable && !AcpiGbl_FADT.AcpiDisable) 96 1.1.1.2.2.2 bouyer { 97 1.1.1.2.2.2 bouyer ACPI_ERROR ((AE_INFO, 98 1.1.1.2.2.2 bouyer "No ACPI mode transition supported in this system " 99 1.1.1.2.2.2 bouyer "(enable/disable both zero)")); 100 1.1.1.2.2.2 bouyer return_ACPI_STATUS (AE_OK); 101 1.1.1.2.2.2 bouyer } 102 1.1.1.2.2.2 bouyer 103 1.1.1.2.2.2 bouyer switch (Mode) 104 1.1.1.2.2.2 bouyer { 105 1.1.1.2.2.2 bouyer case ACPI_SYS_MODE_ACPI: 106 1.1.1.2.2.2 bouyer 107 1.1.1.2.2.2 bouyer /* BIOS should have disabled ALL fixed and GP events */ 108 1.1.1.2.2.2 bouyer 109 1.1.1.2.2.2 bouyer Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, 110 1.1.1.2.2.2 bouyer (UINT32) AcpiGbl_FADT.AcpiEnable, 8); 111 1.1.1.2.2.2 bouyer ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n")); 112 1.1.1.2.2.2 bouyer break; 113 1.1.1.2.2.2 bouyer 114 1.1.1.2.2.2 bouyer case ACPI_SYS_MODE_LEGACY: 115 1.1.1.2.2.2 bouyer 116 1.1.1.2.2.2 bouyer /* 117 1.1.1.2.2.2 bouyer * BIOS should clear all fixed status bits and restore fixed event 118 1.1.1.2.2.2 bouyer * enable bits to default 119 1.1.1.2.2.2 bouyer */ 120 1.1.1.2.2.2 bouyer Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, 121 1.1.1.2.2.2 bouyer (UINT32) AcpiGbl_FADT.AcpiDisable, 8); 122 1.1.1.2.2.2 bouyer ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 123 1.1.1.2.2.2 bouyer "Attempting to enable Legacy (non-ACPI) mode\n")); 124 1.1.1.2.2.2 bouyer break; 125 1.1.1.2.2.2 bouyer 126 1.1.1.2.2.2 bouyer default: 127 1.1.1.2.2.2 bouyer return_ACPI_STATUS (AE_BAD_PARAMETER); 128 1.1.1.2.2.2 bouyer } 129 1.1.1.2.2.2 bouyer 130 1.1.1.2.2.2 bouyer if (ACPI_FAILURE (Status)) 131 1.1.1.2.2.2 bouyer { 132 1.1.1.2.2.2 bouyer ACPI_EXCEPTION ((AE_INFO, Status, 133 1.1.1.2.2.2 bouyer "Could not write ACPI mode change")); 134 1.1.1.2.2.2 bouyer return_ACPI_STATUS (Status); 135 1.1.1.2.2.2 bouyer } 136 1.1.1.2.2.2 bouyer 137 1.1.1.2.2.2 bouyer /* 138 1.1.1.2.2.2 bouyer * Some hardware takes a LONG time to switch modes. Give them 3 sec to 139 1.1.1.2.2.2 bouyer * do so, but allow faster systems to proceed more quickly. 140 1.1.1.2.2.2 bouyer */ 141 1.1.1.2.2.2 bouyer Retry = 3000; 142 1.1.1.2.2.2 bouyer while (Retry) 143 1.1.1.2.2.2 bouyer { 144 1.1.1.2.2.2 bouyer if (AcpiHwGetMode() == Mode) 145 1.1.1.2.2.2 bouyer { 146 1.1.1.2.2.2 bouyer ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n", 147 1.1.1.2.2.2 bouyer Mode)); 148 1.1.1.2.2.2 bouyer return_ACPI_STATUS (AE_OK); 149 1.1.1.2.2.2 bouyer } 150 1.1.1.2.2.2 bouyer AcpiOsStall(1000); 151 1.1.1.2.2.2 bouyer Retry--; 152 1.1.1.2.2.2 bouyer } 153 1.1.1.2.2.2 bouyer 154 1.1.1.2.2.2 bouyer ACPI_ERROR ((AE_INFO, "Hardware did not change modes")); 155 1.1.1.2.2.2 bouyer return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 156 1.1.1.2.2.2 bouyer } 157 1.1.1.2.2.2 bouyer 158 1.1.1.2.2.2 bouyer 159 1.1.1.2.2.2 bouyer /******************************************************************************* 160 1.1.1.2.2.2 bouyer * 161 1.1.1.2.2.2 bouyer * FUNCTION: AcpiHwGetMode 162 1.1.1.2.2.2 bouyer * 163 1.1.1.2.2.2 bouyer * PARAMETERS: none 164 1.1.1.2.2.2 bouyer * 165 1.1.1.2.2.2 bouyer * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY 166 1.1.1.2.2.2 bouyer * 167 1.1.1.2.2.2 bouyer * DESCRIPTION: Return current operating state of system. Determined by 168 1.1.1.2.2.2 bouyer * querying the SCI_EN bit. 169 1.1.1.2.2.2 bouyer * 170 1.1.1.2.2.2 bouyer ******************************************************************************/ 171 1.1.1.2.2.2 bouyer 172 1.1.1.2.2.2 bouyer UINT32 173 1.1.1.2.2.2 bouyer AcpiHwGetMode ( 174 1.1.1.2.2.2 bouyer void) 175 1.1.1.2.2.2 bouyer { 176 1.1.1.2.2.2 bouyer ACPI_STATUS Status; 177 1.1.1.2.2.2 bouyer UINT32 Value; 178 1.1.1.2.2.2 bouyer 179 1.1.1.2.2.2 bouyer 180 1.1.1.2.2.2 bouyer ACPI_FUNCTION_TRACE (HwGetMode); 181 1.1.1.2.2.2 bouyer 182 1.1.1.2.2.2 bouyer 183 1.1.1.2.2.2 bouyer /* 184 1.1.1.2.2.2 bouyer * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 185 1.1.1.2.2.2 bouyer * system does not support mode transition. 186 1.1.1.2.2.2 bouyer */ 187 1.1.1.2.2.2 bouyer if (!AcpiGbl_FADT.SmiCommand) 188 1.1.1.2.2.2 bouyer { 189 1.1.1.2.2.2 bouyer return_UINT32 (ACPI_SYS_MODE_ACPI); 190 1.1.1.2.2.2 bouyer } 191 1.1.1.2.2.2 bouyer 192 1.1.1.2.2.2 bouyer Status = AcpiReadBitRegister (ACPI_BITREG_SCI_ENABLE, &Value); 193 1.1.1.2.2.2 bouyer if (ACPI_FAILURE (Status)) 194 1.1.1.2.2.2 bouyer { 195 1.1.1.2.2.2 bouyer return_UINT32 (ACPI_SYS_MODE_LEGACY); 196 1.1.1.2.2.2 bouyer } 197 1.1.1.2.2.2 bouyer 198 1.1.1.2.2.2 bouyer if (Value) 199 1.1.1.2.2.2 bouyer { 200 1.1.1.2.2.2 bouyer return_UINT32 (ACPI_SYS_MODE_ACPI); 201 1.1.1.2.2.2 bouyer } 202 1.1.1.2.2.2 bouyer else 203 1.1.1.2.2.2 bouyer { 204 1.1.1.2.2.2 bouyer return_UINT32 (ACPI_SYS_MODE_LEGACY); 205 1.1.1.2.2.2 bouyer } 206 1.1.1.2.2.2 bouyer } 207
Indexes created Fri Oct 03 02:09:57 GMT 2025