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}
|