hwgpe.c revision 69450
1/****************************************************************************** 2 * 3 * Module Name: hwgpe - Low level GPE enable/disable/clear functions 4 * $Revision: 25 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999, Intel Corp. All rights 13 * reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#include "acpi.h" 118#include "achware.h" 119#include "acnamesp.h" 120#include "acevents.h" 121 122#define _COMPONENT HARDWARE 123 MODULE_NAME ("hwgpe") 124 125 126/****************************************************************************** 127 * 128 * FUNCTION: AcpiHwEnableGpe 129 * 130 * PARAMETERS: GpeNumber - The GPE 131 * 132 * RETURN: None 133 * 134 * DESCRIPTION: Enable a single GPE. 135 * 136 ******************************************************************************/ 137 138void 139AcpiHwEnableGpe ( 140 UINT32 GpeNumber) 141{ 142 UINT8 InByte; 143 UINT32 RegisterIndex; 144 UINT8 BitMask; 145 146 /* 147 * Translate GPE number to index into global registers array. 148 */ 149 RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; 150 151 /* 152 * Figure out the bit offset for this GPE within the target register. 153 */ 154 BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; 155 156 /* 157 * Read the current value of the register, set the appropriate bit 158 * to enable the GPE, and write out the new register. 159 */ 160 InByte = AcpiOsIn8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr); 161 AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, 162 (UINT8)(InByte | BitMask)); 163} 164 165 166/****************************************************************************** 167 * 168 * FUNCTION: AcpiHwDisableGpe 169 * 170 * PARAMETERS: GpeNumber - The GPE 171 * 172 * RETURN: None 173 * 174 * DESCRIPTION: Disable a single GPE. 175 * 176 ******************************************************************************/ 177 178void 179AcpiHwDisableGpe ( 180 UINT32 GpeNumber) 181{ 182 UINT8 InByte; 183 UINT32 RegisterIndex; 184 UINT8 BitMask; 185 186 /* 187 * Translate GPE number to index into global registers array. 188 */ 189 RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; 190 191 /* 192 * Figure out the bit offset for this GPE within the target register. 193 */ 194 BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; 195 196 /* 197 * Read the current value of the register, clear the appropriate bit, 198 * and write out the new register value to disable the GPE. 199 */ 200 InByte = AcpiOsIn8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr); 201 AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, 202 (UINT8)(InByte & ~BitMask)); 203} 204 205 206/****************************************************************************** 207 * 208 * FUNCTION: AcpiHwClearGpe 209 * 210 * PARAMETERS: GpeNumber - The GPE 211 * 212 * RETURN: None 213 * 214 * DESCRIPTION: Clear a single GPE. 215 * 216 ******************************************************************************/ 217 218void 219AcpiHwClearGpe ( 220 UINT32 GpeNumber) 221{ 222 UINT32 RegisterIndex; 223 UINT8 BitMask; 224 225 /* 226 * Translate GPE number to index into global registers array. 227 */ 228 RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; 229 230 /* 231 * Figure out the bit offset for this GPE within the target register. 232 */ 233 BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; 234 235 /* 236 * Write a one to the appropriate bit in the status register to 237 * clear this GPE. 238 */ 239 AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr, BitMask); 240} 241 242 243/****************************************************************************** 244 * 245 * FUNCTION: AcpiHwGetGpeStatus 246 * 247 * PARAMETERS: GpeNumber - The GPE 248 * 249 * RETURN: None 250 * 251 * DESCRIPTION: Return the status of a single GPE. 252 * 253 ******************************************************************************/ 254 255void 256AcpiHwGetGpeStatus ( 257 UINT32 GpeNumber, 258 ACPI_EVENT_STATUS *EventStatus) 259{ 260 UINT8 InByte = 0; 261 UINT32 RegisterIndex = 0; 262 UINT8 BitMask = 0; 263 264 if (!EventStatus) 265 { 266 return; 267 } 268 269 (*EventStatus) = 0; 270 271 /* 272 * Translate GPE number to index into global registers array. 273 */ 274 RegisterIndex = AcpiGbl_GpeValid[GpeNumber]; 275 276 /* 277 * Figure out the bit offset for this GPE within the target register. 278 */ 279 BitMask = AcpiGbl_DecodeTo8bit [MOD_8 (GpeNumber)]; 280 281 /* 282 * Enabled?: 283 */ 284 InByte = AcpiOsIn8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr); 285 286 if (BitMask & InByte) 287 { 288 (*EventStatus) |= ACPI_EVENT_FLAG_ENABLED; 289 } 290 291 /* 292 * Set? 293 */ 294 InByte = AcpiOsIn8 (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr); 295 296 if (BitMask & InByte) 297 { 298 (*EventStatus) |= ACPI_EVENT_FLAG_SET; 299 } 300} 301