14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#define __HWACPI_C__ 119 120#include "acpi.h" 121 122 123#define _COMPONENT ACPI_HARDWARE 124 ACPI_MODULE_NAME ("hwacpi") 125 126 127/****************************************************************************** 128 * 129 * FUNCTION: AcpiHwInitialize 130 * 131 * PARAMETERS: None 132 * 133 * RETURN: Status 134 * 135 * DESCRIPTION: Initialize and validate various ACPI registers 136 * 137 ******************************************************************************/ 138 139ACPI_STATUS 140AcpiHwInitialize ( 141 void) 142{ 143 ACPI_STATUS Status; 144 145 146 ACPI_FUNCTION_TRACE ("HwInitialize"); 147 148 149 /* We must have the ACPI tables by the time we get here */ 150 151 if (!AcpiGbl_FADT) 152 { 153 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "A FADT is not loaded\n")); 154 155 return_ACPI_STATUS (AE_NO_ACPI_TABLES); 156 } 157 158 /* Sanity check the FADT for valid values */ 159 160 Status = AcpiUtValidateFadt (); 161 if (ACPI_FAILURE (Status)) 162 { 163 return_ACPI_STATUS (Status); 164 } 165 166 return_ACPI_STATUS (AE_OK); 167} 168 169 170/****************************************************************************** 171 * 172 * FUNCTION: AcpiHwSetMode 173 * 174 * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY 175 * 176 * RETURN: Status 177 * 178 * DESCRIPTION: Transitions the system into the requested mode. 179 * 180 ******************************************************************************/ 181 182ACPI_STATUS 183AcpiHwSetMode ( 184 UINT32 Mode) 185{ 186 187 ACPI_STATUS Status; 188 UINT32 Retry; 189 190 191 ACPI_FUNCTION_TRACE ("HwSetMode"); 192 193 /* 194 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 195 * system does not support mode transition. 196 */ 197 if (!AcpiGbl_FADT->SmiCmd) 198 { 199 ACPI_REPORT_ERROR (("No SMI_CMD in FADT, mode transition failed.\n")); 200 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 201 } 202 203 /* 204 * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE 205 * in FADT: If it is zero, enabling or disabling is not supported. 206 * As old systems may have used zero for mode transition, 207 * we make sure both the numbers are zero to determine these 208 * transitions are not supported. 209 */ 210 if (!AcpiGbl_FADT->AcpiEnable && !AcpiGbl_FADT->AcpiDisable) 211 { 212 ACPI_REPORT_ERROR (("No ACPI mode transition supported in this system (enable/disable both zero)\n")); 213 return_ACPI_STATUS (AE_OK); 214 } 215 216 switch (Mode) 217 { 218 case ACPI_SYS_MODE_ACPI: 219 220 /* BIOS should have disabled ALL fixed and GP events */ 221 222 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, 223 (UINT32) AcpiGbl_FADT->AcpiEnable, 8); 224 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n")); 225 break; 226 227 case ACPI_SYS_MODE_LEGACY: 228 229 /* 230 * BIOS should clear all fixed status bits and restore fixed event 231 * enable bits to default 232 */ 233 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, 234 (UINT32) AcpiGbl_FADT->AcpiDisable, 8); 235 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 236 "Attempting to enable Legacy (non-ACPI) mode\n")); 237 break; 238 239 default: 240 return_ACPI_STATUS (AE_BAD_PARAMETER); 241 } 242 243 if (ACPI_FAILURE (Status)) 244 { 245 ACPI_REPORT_ERROR (("Could not write mode change, %s\n", AcpiFormatException (Status))); 246 return_ACPI_STATUS (Status); 247 } 248 249 /* 250 * Some hardware takes a LONG time to switch modes. Give them 3 sec to 251 * do so, but allow faster systems to proceed more quickly. 252 */ 253 Retry = 3000; 254 while (Retry) 255 { 256 if (AcpiHwGetMode() == Mode) 257 { 258 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n", Mode)); 259 return_ACPI_STATUS (AE_OK); 260 } 261 AcpiOsStall(1000); 262 Retry--; 263 } 264 265 ACPI_REPORT_ERROR (("Hardware never changed modes\n")); 266 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 267} 268 269 270/****************************************************************************** 271 * 272 * FUNCTION: AcpiHwGetMode 273 * 274 * PARAMETERS: none 275 * 276 * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY 277 * 278 * DESCRIPTION: Return current operating state of system. Determined by 279 * querying the SCI_EN bit. 280 * 281 ******************************************************************************/ 282 283UINT32 284AcpiHwGetMode (void) 285{ 286 ACPI_STATUS Status; 287 UINT32 Value; 288 289 290 ACPI_FUNCTION_TRACE ("HwGetMode"); 291 292 293 /* 294 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 295 * system does not support mode transition. 296 */ 297 if (!AcpiGbl_FADT->SmiCmd) 298 { 299 return_VALUE (ACPI_SYS_MODE_ACPI); 300 } 301 302 Status = AcpiGetRegister (ACPI_BITREG_SCI_ENABLE, &Value, ACPI_MTX_LOCK); 303 if (ACPI_FAILURE (Status)) 304 { 305 return_VALUE (ACPI_SYS_MODE_LEGACY); 306 } 307 308 if (Value) 309 { 310 return_VALUE (ACPI_SYS_MODE_ACPI); 311 } 312 else 313 { 314 return_VALUE (ACPI_SYS_MODE_LEGACY); 315 } 316}
| 14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#define __HWACPI_C__ 119 120#include "acpi.h" 121 122 123#define _COMPONENT ACPI_HARDWARE 124 ACPI_MODULE_NAME ("hwacpi") 125 126 127/****************************************************************************** 128 * 129 * FUNCTION: AcpiHwInitialize 130 * 131 * PARAMETERS: None 132 * 133 * RETURN: Status 134 * 135 * DESCRIPTION: Initialize and validate various ACPI registers 136 * 137 ******************************************************************************/ 138 139ACPI_STATUS 140AcpiHwInitialize ( 141 void) 142{ 143 ACPI_STATUS Status; 144 145 146 ACPI_FUNCTION_TRACE ("HwInitialize"); 147 148 149 /* We must have the ACPI tables by the time we get here */ 150 151 if (!AcpiGbl_FADT) 152 { 153 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "A FADT is not loaded\n")); 154 155 return_ACPI_STATUS (AE_NO_ACPI_TABLES); 156 } 157 158 /* Sanity check the FADT for valid values */ 159 160 Status = AcpiUtValidateFadt (); 161 if (ACPI_FAILURE (Status)) 162 { 163 return_ACPI_STATUS (Status); 164 } 165 166 return_ACPI_STATUS (AE_OK); 167} 168 169 170/****************************************************************************** 171 * 172 * FUNCTION: AcpiHwSetMode 173 * 174 * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY 175 * 176 * RETURN: Status 177 * 178 * DESCRIPTION: Transitions the system into the requested mode. 179 * 180 ******************************************************************************/ 181 182ACPI_STATUS 183AcpiHwSetMode ( 184 UINT32 Mode) 185{ 186 187 ACPI_STATUS Status; 188 UINT32 Retry; 189 190 191 ACPI_FUNCTION_TRACE ("HwSetMode"); 192 193 /* 194 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 195 * system does not support mode transition. 196 */ 197 if (!AcpiGbl_FADT->SmiCmd) 198 { 199 ACPI_REPORT_ERROR (("No SMI_CMD in FADT, mode transition failed.\n")); 200 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 201 } 202 203 /* 204 * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE 205 * in FADT: If it is zero, enabling or disabling is not supported. 206 * As old systems may have used zero for mode transition, 207 * we make sure both the numbers are zero to determine these 208 * transitions are not supported. 209 */ 210 if (!AcpiGbl_FADT->AcpiEnable && !AcpiGbl_FADT->AcpiDisable) 211 { 212 ACPI_REPORT_ERROR (("No ACPI mode transition supported in this system (enable/disable both zero)\n")); 213 return_ACPI_STATUS (AE_OK); 214 } 215 216 switch (Mode) 217 { 218 case ACPI_SYS_MODE_ACPI: 219 220 /* BIOS should have disabled ALL fixed and GP events */ 221 222 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, 223 (UINT32) AcpiGbl_FADT->AcpiEnable, 8); 224 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n")); 225 break; 226 227 case ACPI_SYS_MODE_LEGACY: 228 229 /* 230 * BIOS should clear all fixed status bits and restore fixed event 231 * enable bits to default 232 */ 233 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, 234 (UINT32) AcpiGbl_FADT->AcpiDisable, 8); 235 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 236 "Attempting to enable Legacy (non-ACPI) mode\n")); 237 break; 238 239 default: 240 return_ACPI_STATUS (AE_BAD_PARAMETER); 241 } 242 243 if (ACPI_FAILURE (Status)) 244 { 245 ACPI_REPORT_ERROR (("Could not write mode change, %s\n", AcpiFormatException (Status))); 246 return_ACPI_STATUS (Status); 247 } 248 249 /* 250 * Some hardware takes a LONG time to switch modes. Give them 3 sec to 251 * do so, but allow faster systems to proceed more quickly. 252 */ 253 Retry = 3000; 254 while (Retry) 255 { 256 if (AcpiHwGetMode() == Mode) 257 { 258 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n", Mode)); 259 return_ACPI_STATUS (AE_OK); 260 } 261 AcpiOsStall(1000); 262 Retry--; 263 } 264 265 ACPI_REPORT_ERROR (("Hardware never changed modes\n")); 266 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 267} 268 269 270/****************************************************************************** 271 * 272 * FUNCTION: AcpiHwGetMode 273 * 274 * PARAMETERS: none 275 * 276 * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY 277 * 278 * DESCRIPTION: Return current operating state of system. Determined by 279 * querying the SCI_EN bit. 280 * 281 ******************************************************************************/ 282 283UINT32 284AcpiHwGetMode (void) 285{ 286 ACPI_STATUS Status; 287 UINT32 Value; 288 289 290 ACPI_FUNCTION_TRACE ("HwGetMode"); 291 292 293 /* 294 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 295 * system does not support mode transition. 296 */ 297 if (!AcpiGbl_FADT->SmiCmd) 298 { 299 return_VALUE (ACPI_SYS_MODE_ACPI); 300 } 301 302 Status = AcpiGetRegister (ACPI_BITREG_SCI_ENABLE, &Value, ACPI_MTX_LOCK); 303 if (ACPI_FAILURE (Status)) 304 { 305 return_VALUE (ACPI_SYS_MODE_LEGACY); 306 } 307 308 if (Value) 309 { 310 return_VALUE (ACPI_SYS_MODE_ACPI); 311 } 312 else 313 { 314 return_VALUE (ACPI_SYS_MODE_LEGACY); 315 } 316}
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