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 | |
| 44 | #include <linux/module.h> |
| 45 | |
| 46 | #include <acpi/acpi.h> |
| 47 | #include <acpi/acnamesp.h> |
| 48 | #include <acpi/acevents.h> |
| 49 | #include <acpi/acinterp.h> |
| 50 | |
| 51 | #define _COMPONENT ACPI_EVENTS |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 52 | ACPI_MODULE_NAME("evxface") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | /******************************************************************************* |
| 55 | * |
| 56 | * FUNCTION: acpi_install_exception_handler |
| 57 | * |
| 58 | * PARAMETERS: Handler - Pointer to the handler function for the |
| 59 | * event |
| 60 | * |
| 61 | * RETURN: Status |
| 62 | * |
| 63 | * DESCRIPTION: Saves the pointer to the handler function |
| 64 | * |
| 65 | ******************************************************************************/ |
| 66 | #ifdef ACPI_FUTURE_USAGE |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 67 | acpi_status acpi_install_exception_handler(acpi_exception_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 69 | acpi_status status; |
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 | ACPI_FUNCTION_TRACE("acpi_install_exception_handler"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 73 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 74 | if (ACPI_FAILURE(status)) { |
| 75 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | /* Don't allow two handlers. */ |
| 79 | |
| 80 | if (acpi_gbl_exception_handler) { |
| 81 | status = AE_ALREADY_EXISTS; |
| 82 | goto cleanup; |
| 83 | } |
| 84 | |
| 85 | /* Install the handler */ |
| 86 | |
| 87 | acpi_gbl_exception_handler = handler; |
| 88 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 89 | cleanup: |
| 90 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 91 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
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 | ******************************************************************************/ |
| 110 | |
| 111 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 112 | acpi_install_fixed_event_handler(u32 event, |
| 113 | acpi_event_handler handler, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 115 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 117 | ACPI_FUNCTION_TRACE("acpi_install_fixed_event_handler"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
| 119 | /* Parameter validation */ |
| 120 | |
| 121 | if (event > ACPI_EVENT_MAX) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 122 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | } |
| 124 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 125 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 126 | if (ACPI_FAILURE(status)) { |
| 127 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | /* Don't allow two handlers. */ |
| 131 | |
| 132 | if (NULL != acpi_gbl_fixed_event_handlers[event].handler) { |
| 133 | status = AE_ALREADY_EXISTS; |
| 134 | goto cleanup; |
| 135 | } |
| 136 | |
| 137 | /* Install the handler before enabling the event */ |
| 138 | |
| 139 | acpi_gbl_fixed_event_handlers[event].handler = handler; |
| 140 | acpi_gbl_fixed_event_handlers[event].context = context; |
| 141 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 142 | status = acpi_clear_event(event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | if (ACPI_SUCCESS(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 144 | status = acpi_enable_event(event, 0); |
| 145 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 146 | ACPI_WARNING((AE_INFO, "Could not enable fixed event %X", |
| 147 | event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
| 149 | /* Remove the handler */ |
| 150 | |
| 151 | acpi_gbl_fixed_event_handlers[event].handler = NULL; |
| 152 | acpi_gbl_fixed_event_handlers[event].context = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 153 | } else { |
| 154 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 155 | "Enabled fixed event %X, Handler=%p\n", event, |
| 156 | handler)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 159 | cleanup: |
| 160 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 161 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | EXPORT_SYMBOL(acpi_install_fixed_event_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | /******************************************************************************* |
| 167 | * |
| 168 | * FUNCTION: acpi_remove_fixed_event_handler |
| 169 | * |
| 170 | * PARAMETERS: Event - Event type to disable. |
| 171 | * Handler - Address of the handler |
| 172 | * |
| 173 | * RETURN: Status |
| 174 | * |
| 175 | * DESCRIPTION: Disables the event and unregisters the event handler. |
| 176 | * |
| 177 | ******************************************************************************/ |
| 178 | |
| 179 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 180 | acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 182 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 184 | ACPI_FUNCTION_TRACE("acpi_remove_fixed_event_handler"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
| 186 | /* Parameter validation */ |
| 187 | |
| 188 | if (event > ACPI_EVENT_MAX) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 189 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 192 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 193 | if (ACPI_FAILURE(status)) { |
| 194 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | /* Disable the event before removing the handler */ |
| 198 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 199 | status = acpi_disable_event(event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | /* Always Remove the handler */ |
| 202 | |
| 203 | acpi_gbl_fixed_event_handlers[event].handler = NULL; |
| 204 | acpi_gbl_fixed_event_handlers[event].context = NULL; |
| 205 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 206 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 207 | ACPI_WARNING((AE_INFO, |
| 208 | "Could not write to fixed event enable register %X", |
| 209 | event)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 210 | } else { |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 211 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Disabled fixed event %X\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 212 | event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | } |
| 214 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 215 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 216 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 219 | EXPORT_SYMBOL(acpi_remove_fixed_event_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
| 221 | /******************************************************************************* |
| 222 | * |
| 223 | * FUNCTION: acpi_install_notify_handler |
| 224 | * |
| 225 | * PARAMETERS: Device - The device for which notifies will be handled |
| 226 | * handler_type - The type of handler: |
| 227 | * ACPI_SYSTEM_NOTIFY: system_handler (00-7f) |
| 228 | * ACPI_DEVICE_NOTIFY: driver_handler (80-ff) |
| 229 | * ACPI_ALL_NOTIFY: both system and device |
| 230 | * Handler - Address of the handler |
| 231 | * Context - Value passed to the handler on each GPE |
| 232 | * |
| 233 | * RETURN: Status |
| 234 | * |
| 235 | * DESCRIPTION: Install a handler for notifies on an ACPI device |
| 236 | * |
| 237 | ******************************************************************************/ |
| 238 | |
| 239 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 240 | acpi_install_notify_handler(acpi_handle device, |
| 241 | u32 handler_type, |
| 242 | acpi_notify_handler handler, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 244 | union acpi_operand_object *obj_desc; |
| 245 | union acpi_operand_object *notify_obj; |
| 246 | struct acpi_namespace_node *node; |
| 247 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 249 | ACPI_FUNCTION_TRACE("acpi_install_notify_handler"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
| 251 | /* Parameter validation */ |
| 252 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 253 | if ((!device) || |
| 254 | (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { |
| 255 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 258 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 259 | if (ACPI_FAILURE(status)) { |
| 260 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | /* Convert and validate the device handle */ |
| 264 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 265 | node = acpi_ns_map_handle_to_node(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | if (!node) { |
| 267 | status = AE_BAD_PARAMETER; |
| 268 | goto unlock_and_exit; |
| 269 | } |
| 270 | |
| 271 | /* |
| 272 | * Root Object: |
| 273 | * Registering a notify handler on the root object indicates that the |
| 274 | * caller wishes to receive notifications for all objects. Note that |
| 275 | * only one <external> global handler can be regsitered (per notify type). |
| 276 | */ |
| 277 | if (device == ACPI_ROOT_OBJECT) { |
| 278 | /* Make sure the handler is not already installed */ |
| 279 | |
| 280 | if (((handler_type & ACPI_SYSTEM_NOTIFY) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 281 | acpi_gbl_system_notify.handler) || |
| 282 | ((handler_type & ACPI_DEVICE_NOTIFY) && |
| 283 | acpi_gbl_device_notify.handler)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | status = AE_ALREADY_EXISTS; |
| 285 | goto unlock_and_exit; |
| 286 | } |
| 287 | |
| 288 | if (handler_type & ACPI_SYSTEM_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 289 | acpi_gbl_system_notify.node = node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | acpi_gbl_system_notify.handler = handler; |
| 291 | acpi_gbl_system_notify.context = context; |
| 292 | } |
| 293 | |
| 294 | if (handler_type & ACPI_DEVICE_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 295 | acpi_gbl_device_notify.node = node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | acpi_gbl_device_notify.handler = handler; |
| 297 | acpi_gbl_device_notify.context = context; |
| 298 | } |
| 299 | |
| 300 | /* Global notify handler installed */ |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | * All Other Objects: |
| 305 | * Caller will only receive notifications specific to the target object. |
| 306 | * Note that only certain object types can receive notifications. |
| 307 | */ |
| 308 | else { |
| 309 | /* Notifies allowed on this object? */ |
| 310 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 311 | if (!acpi_ev_is_notify_object(node)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | status = AE_TYPE; |
| 313 | goto unlock_and_exit; |
| 314 | } |
| 315 | |
| 316 | /* Check for an existing internal object */ |
| 317 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 318 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | if (obj_desc) { |
| 320 | /* Object exists - make sure there's no handler */ |
| 321 | |
| 322 | if (((handler_type & ACPI_SYSTEM_NOTIFY) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 323 | obj_desc->common_notify.system_notify) || |
| 324 | ((handler_type & ACPI_DEVICE_NOTIFY) && |
| 325 | obj_desc->common_notify.device_notify)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | status = AE_ALREADY_EXISTS; |
| 327 | goto unlock_and_exit; |
| 328 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 329 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | /* Create a new object */ |
| 331 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 332 | obj_desc = acpi_ut_create_internal_object(node->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | if (!obj_desc) { |
| 334 | status = AE_NO_MEMORY; |
| 335 | goto unlock_and_exit; |
| 336 | } |
| 337 | |
| 338 | /* Attach new object to the Node */ |
| 339 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 340 | status = |
| 341 | acpi_ns_attach_object(device, obj_desc, node->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
| 343 | /* Remove local reference to the object */ |
| 344 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 345 | acpi_ut_remove_reference(obj_desc); |
| 346 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | goto unlock_and_exit; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | /* Install the handler */ |
| 352 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 353 | notify_obj = |
| 354 | acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | if (!notify_obj) { |
| 356 | status = AE_NO_MEMORY; |
| 357 | goto unlock_and_exit; |
| 358 | } |
| 359 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 360 | notify_obj->notify.node = node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | notify_obj->notify.handler = handler; |
| 362 | notify_obj->notify.context = context; |
| 363 | |
| 364 | if (handler_type & ACPI_SYSTEM_NOTIFY) { |
| 365 | obj_desc->common_notify.system_notify = notify_obj; |
| 366 | } |
| 367 | |
| 368 | if (handler_type & ACPI_DEVICE_NOTIFY) { |
| 369 | obj_desc->common_notify.device_notify = notify_obj; |
| 370 | } |
| 371 | |
| 372 | if (handler_type == ACPI_ALL_NOTIFY) { |
| 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 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 384 | 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 | ******************************************************************************/ |
| 402 | |
| 403 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 404 | acpi_remove_notify_handler(acpi_handle device, |
| 405 | u32 handler_type, acpi_notify_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 407 | union acpi_operand_object *notify_obj; |
| 408 | union acpi_operand_object *obj_desc; |
| 409 | struct acpi_namespace_node *node; |
| 410 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 412 | ACPI_FUNCTION_TRACE("acpi_remove_notify_handler"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
| 414 | /* Parameter validation */ |
| 415 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 416 | if ((!device) || |
| 417 | (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { |
| 418 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | } |
| 420 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 421 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 422 | if (ACPI_FAILURE(status)) { |
| 423 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | /* Convert and validate the device handle */ |
| 427 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 428 | node = acpi_ns_map_handle_to_node(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | if (!node) { |
| 430 | status = AE_BAD_PARAMETER; |
| 431 | goto unlock_and_exit; |
| 432 | } |
| 433 | |
| 434 | /* Root Object */ |
| 435 | |
| 436 | if (device == ACPI_ROOT_OBJECT) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 437 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 438 | "Removing notify handler for namespace root object\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
| 440 | if (((handler_type & ACPI_SYSTEM_NOTIFY) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 441 | !acpi_gbl_system_notify.handler) || |
| 442 | ((handler_type & ACPI_DEVICE_NOTIFY) && |
| 443 | !acpi_gbl_device_notify.handler)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | status = AE_NOT_EXIST; |
| 445 | goto unlock_and_exit; |
| 446 | } |
| 447 | |
| 448 | /* Make sure all deferred tasks are completed */ |
| 449 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 450 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | acpi_os_wait_events_complete(NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 452 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 453 | if (ACPI_FAILURE(status)) { |
| 454 | return_ACPI_STATUS(status); |
| 455 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
| 457 | if (handler_type & ACPI_SYSTEM_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 458 | acpi_gbl_system_notify.node = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | acpi_gbl_system_notify.handler = NULL; |
| 460 | acpi_gbl_system_notify.context = NULL; |
| 461 | } |
| 462 | |
| 463 | if (handler_type & ACPI_DEVICE_NOTIFY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 464 | acpi_gbl_device_notify.node = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | acpi_gbl_device_notify.handler = NULL; |
| 466 | acpi_gbl_device_notify.context = NULL; |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | /* All Other Objects */ |
| 471 | |
| 472 | else { |
| 473 | /* Notifies allowed on this object? */ |
| 474 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 475 | if (!acpi_ev_is_notify_object(node)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | status = AE_TYPE; |
| 477 | goto unlock_and_exit; |
| 478 | } |
| 479 | |
| 480 | /* Check for an existing internal object */ |
| 481 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 482 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | if (!obj_desc) { |
| 484 | status = AE_NOT_EXIST; |
| 485 | goto unlock_and_exit; |
| 486 | } |
| 487 | |
| 488 | /* Object exists - make sure there's an existing handler */ |
| 489 | |
| 490 | if (handler_type & ACPI_SYSTEM_NOTIFY) { |
| 491 | notify_obj = obj_desc->common_notify.system_notify; |
| 492 | if ((!notify_obj) || |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 493 | (notify_obj->notify.handler != handler)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | status = AE_BAD_PARAMETER; |
| 495 | goto unlock_and_exit; |
| 496 | } |
| 497 | /* Make sure all deferred tasks are completed */ |
| 498 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 499 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | acpi_os_wait_events_complete(NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 501 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 502 | if (ACPI_FAILURE(status)) { |
| 503 | return_ACPI_STATUS(status); |
| 504 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | /* Remove the handler */ |
| 507 | obj_desc->common_notify.system_notify = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 508 | acpi_ut_remove_reference(notify_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | if (handler_type & ACPI_DEVICE_NOTIFY) { |
| 512 | notify_obj = obj_desc->common_notify.device_notify; |
| 513 | if ((!notify_obj) || |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 514 | (notify_obj->notify.handler != handler)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | status = AE_BAD_PARAMETER; |
| 516 | goto unlock_and_exit; |
| 517 | } |
| 518 | /* Make sure all deferred tasks are completed */ |
| 519 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 520 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | acpi_os_wait_events_complete(NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 522 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 523 | if (ACPI_FAILURE(status)) { |
| 524 | return_ACPI_STATUS(status); |
| 525 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
| 527 | /* Remove the handler */ |
| 528 | obj_desc->common_notify.device_notify = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 529 | acpi_ut_remove_reference(notify_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | } |
| 531 | } |
| 532 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 533 | unlock_and_exit: |
| 534 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 535 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 538 | EXPORT_SYMBOL(acpi_remove_notify_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
| 540 | /******************************************************************************* |
| 541 | * |
| 542 | * FUNCTION: acpi_install_gpe_handler |
| 543 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 544 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT |
| 545 | * defined GPEs) |
| 546 | * gpe_number - The GPE number within the GPE block |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | * Type - Whether this GPE should be treated as an |
| 548 | * edge- or level-triggered interrupt. |
| 549 | * Address - Address of the handler |
| 550 | * Context - Value passed to the handler on each GPE |
| 551 | * |
| 552 | * RETURN: Status |
| 553 | * |
| 554 | * DESCRIPTION: Install a handler for a General Purpose Event. |
| 555 | * |
| 556 | ******************************************************************************/ |
| 557 | |
| 558 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 559 | acpi_install_gpe_handler(acpi_handle gpe_device, |
| 560 | u32 gpe_number, |
| 561 | u32 type, acpi_event_handler address, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 563 | struct acpi_gpe_event_info *gpe_event_info; |
| 564 | struct acpi_handler_info *handler; |
| 565 | acpi_status status; |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 566 | acpi_cpu_flags flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 568 | ACPI_FUNCTION_TRACE("acpi_install_gpe_handler"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
| 570 | /* Parameter validation */ |
| 571 | |
| 572 | if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 573 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 576 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 577 | if (ACPI_FAILURE(status)) { |
| 578 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | /* Ensure that we have a valid GPE number */ |
| 582 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 583 | 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] | 584 | if (!gpe_event_info) { |
| 585 | status = AE_BAD_PARAMETER; |
| 586 | goto unlock_and_exit; |
| 587 | } |
| 588 | |
| 589 | /* Make sure that there isn't a handler there already */ |
| 590 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 591 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
| 592 | ACPI_GPE_DISPATCH_HANDLER) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | status = AE_ALREADY_EXISTS; |
| 594 | goto unlock_and_exit; |
| 595 | } |
| 596 | |
| 597 | /* Allocate and init handler object */ |
| 598 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 599 | handler = ACPI_MEM_CALLOCATE(sizeof(struct acpi_handler_info)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | if (!handler) { |
| 601 | status = AE_NO_MEMORY; |
| 602 | goto unlock_and_exit; |
| 603 | } |
| 604 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 605 | handler->address = address; |
| 606 | handler->context = context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | handler->method_node = gpe_event_info->dispatch.method_node; |
| 608 | |
| 609 | /* Disable the GPE before installing the handler */ |
| 610 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 611 | status = acpi_ev_disable_gpe(gpe_event_info); |
| 612 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | goto unlock_and_exit; |
| 614 | } |
| 615 | |
| 616 | /* Install the handler */ |
| 617 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 618 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | gpe_event_info->dispatch.handler = handler; |
| 620 | |
| 621 | /* Setup up dispatch flags to indicate handler (vs. method) */ |
| 622 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 623 | 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] | 624 | gpe_event_info->flags |= (u8) (type | ACPI_GPE_DISPATCH_HANDLER); |
| 625 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 626 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 628 | unlock_and_exit: |
| 629 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 630 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 633 | EXPORT_SYMBOL(acpi_install_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
| 635 | /******************************************************************************* |
| 636 | * |
| 637 | * FUNCTION: acpi_remove_gpe_handler |
| 638 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 639 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT |
| 640 | * defined GPEs) |
| 641 | * gpe_number - The event to remove a handler |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | * Address - Address of the handler |
| 643 | * |
| 644 | * RETURN: Status |
| 645 | * |
| 646 | * DESCRIPTION: Remove a handler for a General Purpose acpi_event. |
| 647 | * |
| 648 | ******************************************************************************/ |
| 649 | |
| 650 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 651 | acpi_remove_gpe_handler(acpi_handle gpe_device, |
| 652 | u32 gpe_number, acpi_event_handler address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 654 | struct acpi_gpe_event_info *gpe_event_info; |
| 655 | struct acpi_handler_info *handler; |
| 656 | acpi_status status; |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 657 | acpi_cpu_flags flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 659 | ACPI_FUNCTION_TRACE("acpi_remove_gpe_handler"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
| 661 | /* Parameter validation */ |
| 662 | |
| 663 | if (!address) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 664 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | } |
| 666 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 667 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 668 | if (ACPI_FAILURE(status)) { |
| 669 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | /* Ensure that we have a valid GPE number */ |
| 673 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 674 | 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] | 675 | if (!gpe_event_info) { |
| 676 | status = AE_BAD_PARAMETER; |
| 677 | goto unlock_and_exit; |
| 678 | } |
| 679 | |
| 680 | /* Make sure that a handler is indeed installed */ |
| 681 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 682 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != |
| 683 | ACPI_GPE_DISPATCH_HANDLER) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | status = AE_NOT_EXIST; |
| 685 | goto unlock_and_exit; |
| 686 | } |
| 687 | |
| 688 | /* Make sure that the installed handler is the same */ |
| 689 | |
| 690 | if (gpe_event_info->dispatch.handler->address != address) { |
| 691 | status = AE_BAD_PARAMETER; |
| 692 | goto unlock_and_exit; |
| 693 | } |
| 694 | |
| 695 | /* Disable the GPE before removing the handler */ |
| 696 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 697 | status = acpi_ev_disable_gpe(gpe_event_info); |
| 698 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | goto unlock_and_exit; |
| 700 | } |
| 701 | |
| 702 | /* Make sure all deferred tasks are completed */ |
| 703 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 704 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | acpi_os_wait_events_complete(NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 706 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 707 | if (ACPI_FAILURE(status)) { |
| 708 | return_ACPI_STATUS(status); |
| 709 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | |
| 711 | /* Remove the handler */ |
| 712 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 713 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | handler = gpe_event_info->dispatch.handler; |
| 715 | |
| 716 | /* Restore Method node (if any), set dispatch flags */ |
| 717 | |
| 718 | gpe_event_info->dispatch.method_node = handler->method_node; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 719 | gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | if (handler->method_node) { |
| 721 | gpe_event_info->flags |= ACPI_GPE_DISPATCH_METHOD; |
| 722 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 723 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | |
| 725 | /* Now we can free the handler object */ |
| 726 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 727 | ACPI_MEM_FREE(handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 729 | unlock_and_exit: |
| 730 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 731 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 734 | EXPORT_SYMBOL(acpi_remove_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | |
| 736 | /******************************************************************************* |
| 737 | * |
| 738 | * FUNCTION: acpi_acquire_global_lock |
| 739 | * |
| 740 | * PARAMETERS: Timeout - How long the caller is willing to wait |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 741 | * Handle - Where the handle to the lock is returned |
| 742 | * (if acquired) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | * |
| 744 | * RETURN: Status |
| 745 | * |
| 746 | * DESCRIPTION: Acquire the ACPI Global Lock |
| 747 | * |
| 748 | ******************************************************************************/ |
| 749 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 750 | acpi_status acpi_acquire_global_lock(u16 timeout, u32 * handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 752 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | |
| 754 | if (!handle) { |
| 755 | return (AE_BAD_PARAMETER); |
| 756 | } |
| 757 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 758 | status = acpi_ex_enter_interpreter(); |
| 759 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | return (status); |
| 761 | } |
| 762 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 763 | status = acpi_ev_acquire_global_lock(timeout); |
| 764 | acpi_ex_exit_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 766 | if (ACPI_SUCCESS(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | acpi_gbl_global_lock_handle++; |
| 768 | *handle = acpi_gbl_global_lock_handle; |
| 769 | } |
| 770 | |
| 771 | return (status); |
| 772 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 774 | EXPORT_SYMBOL(acpi_acquire_global_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
| 776 | /******************************************************************************* |
| 777 | * |
| 778 | * FUNCTION: acpi_release_global_lock |
| 779 | * |
| 780 | * PARAMETERS: Handle - Returned from acpi_acquire_global_lock |
| 781 | * |
| 782 | * RETURN: Status |
| 783 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 784 | * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | * |
| 786 | ******************************************************************************/ |
| 787 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 788 | acpi_status acpi_release_global_lock(u32 handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 790 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
| 792 | if (handle != acpi_gbl_global_lock_handle) { |
| 793 | return (AE_NOT_ACQUIRED); |
| 794 | } |
| 795 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 796 | status = acpi_ev_release_global_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | return (status); |
| 798 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 800 | EXPORT_SYMBOL(acpi_release_global_lock); |