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hwacpi.c (151937) hwacpi.c (167802)
1
2/******************************************************************************
3 *
4 * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface
1
2/******************************************************************************
3 *
4 * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface
5 * $Revision: 1.70 $
5 * $Revision: 1.78 $
6 *
7 *****************************************************************************/
8
9/******************************************************************************
10 *
11 * 1. Copyright Notice
12 *
6 *
7 *****************************************************************************/
8
9/******************************************************************************
10 *
11 * 1. Copyright Notice
12 *
13 * Some or all of this work - Copyright (c) 1999 - 2005, Intel Corp.
13 * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp.
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.

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121
122
123#define _COMPONENT ACPI_HARDWARE
124 ACPI_MODULE_NAME ("hwacpi")
125
126
127/******************************************************************************
128 *
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.

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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 the various ACPI registers defined in
136 * the FADT.
137 *
138 ******************************************************************************/
139
140ACPI_STATUS
141AcpiHwInitialize (
142 void)
143{
144 ACPI_STATUS Status;
145
146
147 ACPI_FUNCTION_TRACE ("HwInitialize");
148
149
150 /* We must have the ACPI tables by the time we get here */
151
152 if (!AcpiGbl_FADT)
153 {
154 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No FADT is present\n"));
155
156 return_ACPI_STATUS (AE_NO_ACPI_TABLES);
157 }
158
159 /* Sanity check the FADT for valid values */
160
161 Status = AcpiUtValidateFadt ();
162 if (ACPI_FAILURE (Status))
163 {
164 return_ACPI_STATUS (Status);
165 }
166
167 return_ACPI_STATUS (AE_OK);
168}
169
170
171/******************************************************************************
172 *
173 * FUNCTION: AcpiHwSetMode
174 *
175 * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY
176 *
177 * RETURN: Status
178 *
179 * DESCRIPTION: Transitions the system into the requested mode.
180 *
181 ******************************************************************************/
182
183ACPI_STATUS
184AcpiHwSetMode (
185 UINT32 Mode)
186{
187
188 ACPI_STATUS Status;
189 UINT32 Retry;
190
191
129 * FUNCTION: AcpiHwSetMode
130 *
131 * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY
132 *
133 * RETURN: Status
134 *
135 * DESCRIPTION: Transitions the system into the requested mode.
136 *
137 ******************************************************************************/
138
139ACPI_STATUS
140AcpiHwSetMode (
141 UINT32 Mode)
142{
143
144 ACPI_STATUS Status;
145 UINT32 Retry;
146
147
192 ACPI_FUNCTION_TRACE ("HwSetMode");
148 ACPI_FUNCTION_TRACE (HwSetMode);
193
194 /*
195 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
196 * system does not support mode transition.
197 */
149
150 /*
151 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
152 * system does not support mode transition.
153 */
198 if (!AcpiGbl_FADT->SmiCmd)
154 if (!AcpiGbl_FADT.SmiCommand)
199 {
155 {
200 ACPI_REPORT_ERROR (("No SMI_CMD in FADT, mode transition failed.\n"));
156 ACPI_ERROR ((AE_INFO, "No SMI_CMD in FADT, mode transition failed"));
201 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
202 }
203
204 /*
205 * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE
206 * in FADT: If it is zero, enabling or disabling is not supported.
207 * As old systems may have used zero for mode transition,
208 * we make sure both the numbers are zero to determine these
209 * transitions are not supported.
210 */
157 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
158 }
159
160 /*
161 * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE
162 * in FADT: If it is zero, enabling or disabling is not supported.
163 * As old systems may have used zero for mode transition,
164 * we make sure both the numbers are zero to determine these
165 * transitions are not supported.
166 */
211 if (!AcpiGbl_FADT->AcpiEnable && !AcpiGbl_FADT->AcpiDisable)
167 if (!AcpiGbl_FADT.AcpiEnable && !AcpiGbl_FADT.AcpiDisable)
212 {
168 {
213 ACPI_REPORT_ERROR ((
214 "No ACPI mode transition supported in this system (enable/disable both zero)\n"));
169 ACPI_ERROR ((AE_INFO,
170 "No ACPI mode transition supported in this system (enable/disable both zero)"));
215 return_ACPI_STATUS (AE_OK);
216 }
217
218 switch (Mode)
219 {
220 case ACPI_SYS_MODE_ACPI:
221
222 /* BIOS should have disabled ALL fixed and GP events */
223
171 return_ACPI_STATUS (AE_OK);
172 }
173
174 switch (Mode)
175 {
176 case ACPI_SYS_MODE_ACPI:
177
178 /* BIOS should have disabled ALL fixed and GP events */
179
224 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd,
225 (UINT32) AcpiGbl_FADT->AcpiEnable, 8);
180 Status = AcpiOsWritePort (AcpiGbl_FADT.SmiCommand,
181 (UINT32) AcpiGbl_FADT.AcpiEnable, 8);
226 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n"));
227 break;
228
229 case ACPI_SYS_MODE_LEGACY:
230
231 /*
232 * BIOS should clear all fixed status bits and restore fixed event
233 * enable bits to default
234 */
182 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n"));
183 break;
184
185 case ACPI_SYS_MODE_LEGACY:
186
187 /*
188 * BIOS should clear all fixed status bits and restore fixed event
189 * enable bits to default
190 */
235 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd,
236 (UINT32) AcpiGbl_FADT->AcpiDisable, 8);
191 Status = AcpiOsWritePort (AcpiGbl_FADT.SmiCommand,
192 (UINT32) AcpiGbl_FADT.AcpiDisable, 8);
237 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
238 "Attempting to enable Legacy (non-ACPI) mode\n"));
239 break;
240
241 default:
242 return_ACPI_STATUS (AE_BAD_PARAMETER);
243 }
244
245 if (ACPI_FAILURE (Status))
246 {
193 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
194 "Attempting to enable Legacy (non-ACPI) mode\n"));
195 break;
196
197 default:
198 return_ACPI_STATUS (AE_BAD_PARAMETER);
199 }
200
201 if (ACPI_FAILURE (Status))
202 {
247 ACPI_REPORT_ERROR (("Could not write mode change, %s\n",
248 AcpiFormatException (Status)));
203 ACPI_EXCEPTION ((AE_INFO, Status,
204 "Could not write ACPI mode change"));
249 return_ACPI_STATUS (Status);
250 }
251
252 /*
253 * Some hardware takes a LONG time to switch modes. Give them 3 sec to
254 * do so, but allow faster systems to proceed more quickly.
255 */
256 Retry = 3000;

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261 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n",
262 Mode));
263 return_ACPI_STATUS (AE_OK);
264 }
265 AcpiOsStall(1000);
266 Retry--;
267 }
268
205 return_ACPI_STATUS (Status);
206 }
207
208 /*
209 * Some hardware takes a LONG time to switch modes. Give them 3 sec to
210 * do so, but allow faster systems to proceed more quickly.
211 */
212 Retry = 3000;

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217 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n",
218 Mode));
219 return_ACPI_STATUS (AE_OK);
220 }
221 AcpiOsStall(1000);
222 Retry--;
223 }
224
269 ACPI_REPORT_ERROR (("Hardware never changed modes\n"));
225 ACPI_ERROR ((AE_INFO, "Hardware did not change modes"));
270 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
271}
272
273
274/*******************************************************************************
275 *
276 * FUNCTION: AcpiHwGetMode
277 *

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287UINT32
288AcpiHwGetMode (
289 void)
290{
291 ACPI_STATUS Status;
292 UINT32 Value;
293
294
226 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
227}
228
229
230/*******************************************************************************
231 *
232 * FUNCTION: AcpiHwGetMode
233 *

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243UINT32
244AcpiHwGetMode (
245 void)
246{
247 ACPI_STATUS Status;
248 UINT32 Value;
249
250
295 ACPI_FUNCTION_TRACE ("HwGetMode");
251 ACPI_FUNCTION_TRACE (HwGetMode);
296
297
298 /*
299 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
300 * system does not support mode transition.
301 */
252
253
254 /*
255 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
256 * system does not support mode transition.
257 */
302 if (!AcpiGbl_FADT->SmiCmd)
258 if (!AcpiGbl_FADT.SmiCommand)
303 {
304 return_UINT32 (ACPI_SYS_MODE_ACPI);
305 }
306
259 {
260 return_UINT32 (ACPI_SYS_MODE_ACPI);
261 }
262
307 Status = AcpiGetRegister (ACPI_BITREG_SCI_ENABLE, &Value, ACPI_MTX_LOCK);
263 Status = AcpiGetRegister (ACPI_BITREG_SCI_ENABLE, &Value);
308 if (ACPI_FAILURE (Status))
309 {
310 return_UINT32 (ACPI_SYS_MODE_LEGACY);
311 }
312
313 if (Value)
314 {
315 return_UINT32 (ACPI_SYS_MODE_ACPI);
316 }
317 else
318 {
319 return_UINT32 (ACPI_SYS_MODE_LEGACY);
320 }
321}
264 if (ACPI_FAILURE (Status))
265 {
266 return_UINT32 (ACPI_SYS_MODE_LEGACY);
267 }
268
269 if (Value)
270 {
271 return_UINT32 (ACPI_SYS_MODE_ACPI);
272 }
273 else
274 {
275 return_UINT32 (ACPI_SYS_MODE_LEGACY);
276 }
277}