Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evxface - External interfaces for ACPI events |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
| 45 | #include <acpi/acnamesp.h> |
| 46 | #include <acpi/acevents.h> |
| 47 | #include <acpi/acinterp.h> |
| 48 | |
| 49 | #define _COMPONENT ACPI_EVENTS |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 50 | ACPI_MODULE_NAME("evxface") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | /******************************************************************************* |
| 53 | * |
| 54 | * FUNCTION: acpi_install_exception_handler |
| 55 | * |
| 56 | * PARAMETERS: Handler - Pointer to the handler function for the |
| 57 | * event |
| 58 | * |
| 59 | * RETURN: Status |
| 60 | * |
| 61 | * DESCRIPTION: Saves the pointer to the handler function |
| 62 | * |
| 63 | ******************************************************************************/ |
| 64 | #ifdef ACPI_FUTURE_USAGE |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 65 | acpi_status acpi_install_exception_handler(acpi_exception_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 67 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 69 | ACPI_FUNCTION_TRACE(acpi_install_exception_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 71 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 72 | if (ACPI_FAILURE(status)) { |
| 73 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | /* Don't allow two handlers. */ |
| 77 | |
| 78 | if (acpi_gbl_exception_handler) { |
| 79 | status = AE_ALREADY_EXISTS; |
| 80 | goto cleanup; |
| 81 | } |
| 82 | |
| 83 | /* Install the handler */ |
| 84 | |
| 85 | acpi_gbl_exception_handler = handler; |
| 86 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 87 | cleanup: |
| 88 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 89 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 91 | |
| 92 | ACPI_EXPORT_SYMBOL(acpi_install_exception_handler) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 93 | #endif /* ACPI_FUTURE_USAGE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
| 95 | /******************************************************************************* |
| 96 | * |
| 97 | * FUNCTION: acpi_install_fixed_event_handler |
| 98 | * |
| 99 | * PARAMETERS: Event - Event type to enable. |
| 100 | * Handler - Pointer to the handler function for the |
| 101 | * event |
| 102 | * Context - Value passed to the handler on each GPE |
| 103 | * |
| 104 | * RETURN: Status |
| 105 | * |
| 106 | * DESCRIPTION: Saves the pointer to the handler function and then enables the |
| 107 | * event. |
| 108 | * |
| 109 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 111 | acpi_install_fixed_event_handler(u32 event, |
| 112 | acpi_event_handler handler, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 114 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 116 | ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
| 118 | /* Parameter validation */ |
| 119 | |
| 120 | if (event > ACPI_EVENT_MAX) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 121 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 124 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 125 | if (ACPI_FAILURE(status)) { |
| 126 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | /* Don't allow two handlers. */ |
| 130 | |
| 131 | if (NULL != acpi_gbl_fixed_event_handlers[event].handler) { |
| 132 | status = AE_ALREADY_EXISTS; |
| 133 | goto cleanup; |
| 134 | } |
| 135 | |
| 136 | /* Install the handler before enabling the event */ |
| 137 | |
| 138 | acpi_gbl_fixed_event_handlers[event].handler = handler; |
| 139 | acpi_gbl_fixed_event_handlers[event].context = context; |
| 140 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 141 | status = acpi_clear_event(event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | if (ACPI_SUCCESS(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 143 | status = acpi_enable_event(event, 0); |
| 144 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 145 | ACPI_WARNING((AE_INFO, "Could not enable fixed event %X", |
| 146 | event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | /* Remove the handler */ |
| 149 | |
| 150 | acpi_gbl_fixed_event_handlers[event].handler = NULL; |
| 151 | acpi_gbl_fixed_event_handlers[event].context = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 152 | } else { |
| 153 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 154 | "Enabled fixed event %X, Handler=%p\n", event, |
| 155 | handler)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 158 | cleanup: |
| 159 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 160 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 163 | ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | /******************************************************************************* |
| 166 | * |
| 167 | * FUNCTION: acpi_remove_fixed_event_handler |
| 168 | * |
| 169 | * PARAMETERS: Event - Event type to disable. |
| 170 | * Handler - Address of the handler |
| 171 | * |
| 172 | * RETURN: Status |
| 173 | * |
| 174 | * DESCRIPTION: Disables the event and unregisters the event handler. |
| 175 | * |
| 176 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 178 | acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 180 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 182 | ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
| 184 | /* Parameter validation */ |
| 185 | |
| 186 | if (event > ACPI_EVENT_MAX) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 187 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
| 189 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 190 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 191 | if (ACPI_FAILURE(status)) { |
| 192 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | /* Disable the event before removing the handler */ |
| 196 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 197 | status = acpi_disable_event(event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
| 199 | /* Always Remove the handler */ |
| 200 | |
| 201 | acpi_gbl_fixed_event_handlers[event].handler = NULL; |
| 202 | acpi_gbl_fixed_event_handlers[event].context = NULL; |
| 203 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 204 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 205 | ACPI_WARNING((AE_INFO, |
| 206 | "Could not write to fixed event enable register %X", |
| 207 | event)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 208 | } else { |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 209 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Disabled fixed event %X\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 210 | event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | } |
| 212 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 213 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 214 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 217 | ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
| 219 | /******************************************************************************* |
| 220 | * |
| 221 | * FUNCTION: acpi_install_notify_handler |
| 222 | * |
| 223 | * PARAMETERS: Device - The device for which notifies will be handled |
| 224 | * handler_type - The type of handler: |
| 225 | * ACPI_SYSTEM_NOTIFY: system_handler (00-7f) |
| 226 | * ACPI_DEVICE_NOTIFY: driver_handler (80-ff) |
| 227 | * ACPI_ALL_NOTIFY: both system and device |
| 228 | * Handler - Address of the handler |
| 229 | * Context - Value passed to the handler on each GPE |
| 230 | * |
| 231 | * RETURN: Status |
| 232 | * |
| 233 | * DESCRIPTION: Install a handler for notifies on an ACPI device |
| 234 | * |
| 235 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 237 | acpi_install_notify_handler(acpi_handle device, |
| 238 | u32 handler_type, |
| 239 | acpi_notify_handler handler, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 241 | union acpi_operand_object *obj_desc; |
| 242 | union acpi_operand_object *notify_obj; |
| 243 | struct acpi_namespace_node *node; |
| 244 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 246 | ACPI_FUNCTION_TRACE(acpi_install_notify_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | /* Parameter validation */ |
| 249 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 250 | if ((!device) || |
| 251 | (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { |
| 252 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 255 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 256 | if (ACPI_FAILURE(status)) { |
| 257 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | /* Convert and validate the device handle */ |
| 261 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 262 | node = acpi_ns_map_handle_to_node(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | if (!node) { |
| 264 | status = AE_BAD_PARAMETER; |
| 265 | goto unlock_and_exit; |
| 266 | } |
| 267 | |
| 268 | /* |
| 269 | * Root Object: |
| 270 | * Registering a notify handler on the root object indicates that the |
| 271 | * caller wishes to receive notifications for all objects. Note that |
| 272 | * only one <external> global handler can be regsitered (per notify type). |
| 273 | */ |
| 274 | if (device == ACPI_ROOT_OBJECT) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | /* Make sure the handler is not already installed */ |
| 277 | |
| 278 | if (((handler_type & ACPI_SYSTEM_NOTIFY) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 279 | acpi_gbl_system_notify.handler) || |
| 280 | ((handler_type & ACPI_DEVICE_NOTIFY) && |
| 281 | acpi_gbl_device_notify.handler)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | status = AE_ALREADY_EXISTS; |
| 283 | goto unlock_and_exit; |
| 284 | } |
| 285 | |
| 286 | if (handler_type & ACPI_SYSTEM_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 287 | acpi_gbl_system_notify.node = node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | acpi_gbl_system_notify.handler = handler; |
| 289 | acpi_gbl_system_notify.context = context; |
| 290 | } |
| 291 | |
| 292 | if (handler_type & ACPI_DEVICE_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 293 | acpi_gbl_device_notify.node = node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | acpi_gbl_device_notify.handler = handler; |
| 295 | acpi_gbl_device_notify.context = context; |
| 296 | } |
| 297 | |
| 298 | /* Global notify handler installed */ |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * All Other Objects: |
| 303 | * Caller will only receive notifications specific to the target object. |
| 304 | * Note that only certain object types can receive notifications. |
| 305 | */ |
| 306 | else { |
| 307 | /* Notifies allowed on this object? */ |
| 308 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 309 | if (!acpi_ev_is_notify_object(node)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | status = AE_TYPE; |
| 311 | goto unlock_and_exit; |
| 312 | } |
| 313 | |
| 314 | /* Check for an existing internal object */ |
| 315 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 316 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | if (obj_desc) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | /* Object exists - make sure there's no handler */ |
| 320 | |
| 321 | if (((handler_type & ACPI_SYSTEM_NOTIFY) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 322 | obj_desc->common_notify.system_notify) || |
| 323 | ((handler_type & ACPI_DEVICE_NOTIFY) && |
| 324 | obj_desc->common_notify.device_notify)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | status = AE_ALREADY_EXISTS; |
| 326 | goto unlock_and_exit; |
| 327 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 328 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | /* Create a new object */ |
| 330 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 331 | obj_desc = acpi_ut_create_internal_object(node->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | if (!obj_desc) { |
| 333 | status = AE_NO_MEMORY; |
| 334 | goto unlock_and_exit; |
| 335 | } |
| 336 | |
| 337 | /* Attach new object to the Node */ |
| 338 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 339 | status = |
| 340 | acpi_ns_attach_object(device, obj_desc, node->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
| 342 | /* Remove local reference to the object */ |
| 343 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 344 | acpi_ut_remove_reference(obj_desc); |
| 345 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | goto unlock_and_exit; |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | /* Install the handler */ |
| 351 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 352 | notify_obj = |
| 353 | acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | if (!notify_obj) { |
| 355 | status = AE_NO_MEMORY; |
| 356 | goto unlock_and_exit; |
| 357 | } |
| 358 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 359 | notify_obj->notify.node = node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | notify_obj->notify.handler = handler; |
| 361 | notify_obj->notify.context = context; |
| 362 | |
| 363 | if (handler_type & ACPI_SYSTEM_NOTIFY) { |
| 364 | obj_desc->common_notify.system_notify = notify_obj; |
| 365 | } |
| 366 | |
| 367 | if (handler_type & ACPI_DEVICE_NOTIFY) { |
| 368 | obj_desc->common_notify.device_notify = notify_obj; |
| 369 | } |
| 370 | |
| 371 | if (handler_type == ACPI_ALL_NOTIFY) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | /* Extra ref if installed in both */ |
| 374 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 375 | acpi_ut_add_reference(notify_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | } |
| 377 | } |
| 378 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 379 | unlock_and_exit: |
| 380 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 381 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 384 | ACPI_EXPORT_SYMBOL(acpi_install_notify_handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
| 386 | /******************************************************************************* |
| 387 | * |
| 388 | * FUNCTION: acpi_remove_notify_handler |
| 389 | * |
| 390 | * PARAMETERS: Device - The device for which notifies will be handled |
| 391 | * handler_type - The type of handler: |
| 392 | * ACPI_SYSTEM_NOTIFY: system_handler (00-7f) |
| 393 | * ACPI_DEVICE_NOTIFY: driver_handler (80-ff) |
| 394 | * ACPI_ALL_NOTIFY: both system and device |
| 395 | * Handler - Address of the handler |
| 396 | * |
| 397 | * RETURN: Status |
| 398 | * |
| 399 | * DESCRIPTION: Remove a handler for notifies on an ACPI device |
| 400 | * |
| 401 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 403 | acpi_remove_notify_handler(acpi_handle device, |
| 404 | u32 handler_type, acpi_notify_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 406 | union acpi_operand_object *notify_obj; |
| 407 | union acpi_operand_object *obj_desc; |
| 408 | struct acpi_namespace_node *node; |
| 409 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 411 | ACPI_FUNCTION_TRACE(acpi_remove_notify_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
| 413 | /* Parameter validation */ |
| 414 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 415 | if ((!device) || |
| 416 | (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { |
| 417 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | } |
| 419 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 420 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 421 | if (ACPI_FAILURE(status)) { |
| 422 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | /* Convert and validate the device handle */ |
| 426 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 427 | node = acpi_ns_map_handle_to_node(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | if (!node) { |
| 429 | status = AE_BAD_PARAMETER; |
| 430 | goto unlock_and_exit; |
| 431 | } |
| 432 | |
| 433 | /* Root Object */ |
| 434 | |
| 435 | if (device == ACPI_ROOT_OBJECT) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 436 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 437 | "Removing notify handler for namespace root object\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
| 439 | if (((handler_type & ACPI_SYSTEM_NOTIFY) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 440 | !acpi_gbl_system_notify.handler) || |
| 441 | ((handler_type & ACPI_DEVICE_NOTIFY) && |
| 442 | !acpi_gbl_device_notify.handler)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | status = AE_NOT_EXIST; |
| 444 | goto unlock_and_exit; |
| 445 | } |
| 446 | |
| 447 | /* Make sure all deferred tasks are completed */ |
| 448 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 449 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | acpi_os_wait_events_complete(NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 451 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 452 | if (ACPI_FAILURE(status)) { |
| 453 | return_ACPI_STATUS(status); |
| 454 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
| 456 | if (handler_type & ACPI_SYSTEM_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 457 | acpi_gbl_system_notify.node = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | acpi_gbl_system_notify.handler = NULL; |
| 459 | acpi_gbl_system_notify.context = NULL; |
| 460 | } |
| 461 | |
| 462 | if (handler_type & ACPI_DEVICE_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 463 | acpi_gbl_device_notify.node = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | acpi_gbl_device_notify.handler = NULL; |
| 465 | acpi_gbl_device_notify.context = NULL; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | /* All Other Objects */ |
| 470 | |
| 471 | else { |
| 472 | /* Notifies allowed on this object? */ |
| 473 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 474 | if (!acpi_ev_is_notify_object(node)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | status = AE_TYPE; |
| 476 | goto unlock_and_exit; |
| 477 | } |
| 478 | |
| 479 | /* Check for an existing internal object */ |
| 480 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 481 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if (!obj_desc) { |
| 483 | status = AE_NOT_EXIST; |
| 484 | goto unlock_and_exit; |
| 485 | } |
| 486 | |
| 487 | /* Object exists - make sure there's an existing handler */ |
| 488 | |
| 489 | if (handler_type & ACPI_SYSTEM_NOTIFY) { |
| 490 | notify_obj = obj_desc->common_notify.system_notify; |
| 491 | if ((!notify_obj) || |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 492 | (notify_obj->notify.handler != handler)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | status = AE_BAD_PARAMETER; |
| 494 | goto unlock_and_exit; |
| 495 | } |
| 496 | /* Make sure all deferred tasks are completed */ |
| 497 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 498 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | acpi_os_wait_events_complete(NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 500 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 501 | if (ACPI_FAILURE(status)) { |
| 502 | return_ACPI_STATUS(status); |
| 503 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | |
| 505 | /* Remove the handler */ |
| 506 | obj_desc->common_notify.system_notify = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 507 | acpi_ut_remove_reference(notify_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | } |
| 509 | |
| 510 | if (handler_type & ACPI_DEVICE_NOTIFY) { |
| 511 | notify_obj = obj_desc->common_notify.device_notify; |
| 512 | if ((!notify_obj) || |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 513 | (notify_obj->notify.handler != handler)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | status = AE_BAD_PARAMETER; |
| 515 | goto unlock_and_exit; |
| 516 | } |
| 517 | /* Make sure all deferred tasks are completed */ |
| 518 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 519 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | acpi_os_wait_events_complete(NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 521 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 522 | if (ACPI_FAILURE(status)) { |
| 523 | return_ACPI_STATUS(status); |
| 524 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
| 526 | /* Remove the handler */ |
| 527 | obj_desc->common_notify.device_notify = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 528 | acpi_ut_remove_reference(notify_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | } |
| 530 | } |
| 531 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 532 | unlock_and_exit: |
| 533 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 534 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 537 | ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
| 539 | /******************************************************************************* |
| 540 | * |
| 541 | * FUNCTION: acpi_install_gpe_handler |
| 542 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 543 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT |
| 544 | * defined GPEs) |
| 545 | * gpe_number - The GPE number within the GPE block |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | * Type - Whether this GPE should be treated as an |
| 547 | * edge- or level-triggered interrupt. |
| 548 | * Address - Address of the handler |
| 549 | * Context - Value passed to the handler on each GPE |
| 550 | * |
| 551 | * RETURN: Status |
| 552 | * |
| 553 | * DESCRIPTION: Install a handler for a General Purpose Event. |
| 554 | * |
| 555 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 557 | acpi_install_gpe_handler(acpi_handle gpe_device, |
| 558 | u32 gpe_number, |
| 559 | u32 type, acpi_event_handler address, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 561 | struct acpi_gpe_event_info *gpe_event_info; |
| 562 | struct acpi_handler_info *handler; |
| 563 | acpi_status status; |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 564 | acpi_cpu_flags flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 566 | ACPI_FUNCTION_TRACE(acpi_install_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
| 568 | /* Parameter validation */ |
| 569 | |
| 570 | if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 571 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
| 573 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 574 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 575 | if (ACPI_FAILURE(status)) { |
| 576 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | /* Ensure that we have a valid GPE number */ |
| 580 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 581 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | if (!gpe_event_info) { |
| 583 | status = AE_BAD_PARAMETER; |
| 584 | goto unlock_and_exit; |
| 585 | } |
| 586 | |
| 587 | /* Make sure that there isn't a handler there already */ |
| 588 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 589 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
| 590 | ACPI_GPE_DISPATCH_HANDLER) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | status = AE_ALREADY_EXISTS; |
| 592 | goto unlock_and_exit; |
| 593 | } |
| 594 | |
| 595 | /* Allocate and init handler object */ |
| 596 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 597 | handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_handler_info)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | if (!handler) { |
| 599 | status = AE_NO_MEMORY; |
| 600 | goto unlock_and_exit; |
| 601 | } |
| 602 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 603 | handler->address = address; |
| 604 | handler->context = context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | handler->method_node = gpe_event_info->dispatch.method_node; |
| 606 | |
| 607 | /* Disable the GPE before installing the handler */ |
| 608 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 609 | status = acpi_ev_disable_gpe(gpe_event_info); |
| 610 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | goto unlock_and_exit; |
| 612 | } |
| 613 | |
| 614 | /* Install the handler */ |
| 615 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 616 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | gpe_event_info->dispatch.handler = handler; |
| 618 | |
| 619 | /* Setup up dispatch flags to indicate handler (vs. method) */ |
| 620 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 621 | gpe_event_info->flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); /* Clear bits */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | gpe_event_info->flags |= (u8) (type | ACPI_GPE_DISPATCH_HANDLER); |
| 623 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 624 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 626 | unlock_and_exit: |
| 627 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 628 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 631 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
| 633 | /******************************************************************************* |
| 634 | * |
| 635 | * FUNCTION: acpi_remove_gpe_handler |
| 636 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 637 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT |
| 638 | * defined GPEs) |
| 639 | * gpe_number - The event to remove a handler |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | * Address - Address of the handler |
| 641 | * |
| 642 | * RETURN: Status |
| 643 | * |
| 644 | * DESCRIPTION: Remove a handler for a General Purpose acpi_event. |
| 645 | * |
| 646 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 648 | acpi_remove_gpe_handler(acpi_handle gpe_device, |
| 649 | u32 gpe_number, acpi_event_handler address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 651 | struct acpi_gpe_event_info *gpe_event_info; |
| 652 | struct acpi_handler_info *handler; |
| 653 | acpi_status status; |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 654 | acpi_cpu_flags flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 656 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
| 658 | /* Parameter validation */ |
| 659 | |
| 660 | if (!address) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 661 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
| 663 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 664 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 665 | if (ACPI_FAILURE(status)) { |
| 666 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | } |
| 668 | |
| 669 | /* Ensure that we have a valid GPE number */ |
| 670 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 671 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | if (!gpe_event_info) { |
| 673 | status = AE_BAD_PARAMETER; |
| 674 | goto unlock_and_exit; |
| 675 | } |
| 676 | |
| 677 | /* Make sure that a handler is indeed installed */ |
| 678 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 679 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != |
| 680 | ACPI_GPE_DISPATCH_HANDLER) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | status = AE_NOT_EXIST; |
| 682 | goto unlock_and_exit; |
| 683 | } |
| 684 | |
| 685 | /* Make sure that the installed handler is the same */ |
| 686 | |
| 687 | if (gpe_event_info->dispatch.handler->address != address) { |
| 688 | status = AE_BAD_PARAMETER; |
| 689 | goto unlock_and_exit; |
| 690 | } |
| 691 | |
| 692 | /* Disable the GPE before removing the handler */ |
| 693 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 694 | status = acpi_ev_disable_gpe(gpe_event_info); |
| 695 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | goto unlock_and_exit; |
| 697 | } |
| 698 | |
| 699 | /* Make sure all deferred tasks are completed */ |
| 700 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 701 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | acpi_os_wait_events_complete(NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 703 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 704 | if (ACPI_FAILURE(status)) { |
| 705 | return_ACPI_STATUS(status); |
| 706 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | |
| 708 | /* Remove the handler */ |
| 709 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 710 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | handler = gpe_event_info->dispatch.handler; |
| 712 | |
| 713 | /* Restore Method node (if any), set dispatch flags */ |
| 714 | |
| 715 | gpe_event_info->dispatch.method_node = handler->method_node; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 716 | gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | if (handler->method_node) { |
| 718 | gpe_event_info->flags |= ACPI_GPE_DISPATCH_METHOD; |
| 719 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 720 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | |
| 722 | /* Now we can free the handler object */ |
| 723 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 724 | ACPI_FREE(handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 726 | unlock_and_exit: |
| 727 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 728 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 731 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | |
| 733 | /******************************************************************************* |
| 734 | * |
| 735 | * FUNCTION: acpi_acquire_global_lock |
| 736 | * |
| 737 | * PARAMETERS: Timeout - How long the caller is willing to wait |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 738 | * Handle - Where the handle to the lock is returned |
| 739 | * (if acquired) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | * |
| 741 | * RETURN: Status |
| 742 | * |
| 743 | * DESCRIPTION: Acquire the ACPI Global Lock |
| 744 | * |
| 745 | ******************************************************************************/ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 746 | acpi_status acpi_acquire_global_lock(u16 timeout, u32 * handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 748 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
| 750 | if (!handle) { |
| 751 | return (AE_BAD_PARAMETER); |
| 752 | } |
| 753 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 754 | status = acpi_ex_enter_interpreter(); |
| 755 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | return (status); |
| 757 | } |
| 758 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 759 | status = acpi_ev_acquire_global_lock(timeout); |
| 760 | acpi_ex_exit_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 762 | if (ACPI_SUCCESS(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | acpi_gbl_global_lock_handle++; |
| 764 | *handle = acpi_gbl_global_lock_handle; |
| 765 | } |
| 766 | |
| 767 | return (status); |
| 768 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 770 | ACPI_EXPORT_SYMBOL(acpi_acquire_global_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | |
| 772 | /******************************************************************************* |
| 773 | * |
| 774 | * FUNCTION: acpi_release_global_lock |
| 775 | * |
| 776 | * PARAMETERS: Handle - Returned from acpi_acquire_global_lock |
| 777 | * |
| 778 | * RETURN: Status |
| 779 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 780 | * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | * |
| 782 | ******************************************************************************/ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 783 | acpi_status acpi_release_global_lock(u32 handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 785 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | |
| 787 | if (handle != acpi_gbl_global_lock_handle) { |
| 788 | return (AE_NOT_ACQUIRED); |
| 789 | } |
| 790 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 791 | status = acpi_ev_release_global_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | return (status); |
| 793 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 795 | ACPI_EXPORT_SYMBOL(acpi_release_global_lock) |