Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evevent - Fixed Event handling and dispatch |
| 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 <acpi/acpi.h> |
| 45 | #include <acpi/acevents.h> |
| 46 | |
| 47 | #define _COMPONENT ACPI_EVENTS |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 48 | ACPI_MODULE_NAME("evevent") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 50 | /* Local prototypes */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | static acpi_status acpi_ev_fixed_event_initialize(void); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 52 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 53 | static u32 acpi_ev_fixed_event_dispatch(u32 event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
| 55 | /******************************************************************************* |
| 56 | * |
| 57 | * FUNCTION: acpi_ev_initialize_events |
| 58 | * |
| 59 | * PARAMETERS: None |
| 60 | * |
| 61 | * RETURN: Status |
| 62 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 63 | * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | * |
| 65 | ******************************************************************************/ |
| 66 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 67 | acpi_status acpi_ev_initialize_events(void) |
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 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 71 | ACPI_FUNCTION_TRACE(ev_initialize_events); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | /* Make sure we have ACPI tables */ |
| 74 | |
| 75 | if (!acpi_gbl_DSDT) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 76 | ACPI_WARNING((AE_INFO, "No ACPI tables present!")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 77 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | /* |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 81 | * Initialize the Fixed and General Purpose Events. This is done prior to |
| 82 | * enabling SCIs to prevent interrupts from occurring before the handlers are |
| 83 | * installed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 85 | status = acpi_ev_fixed_event_initialize(); |
| 86 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 87 | ACPI_EXCEPTION((AE_INFO, status, |
| 88 | "Unable to initialize fixed events")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 89 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | status = acpi_ev_gpe_initialize(); |
| 93 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 94 | ACPI_EXCEPTION((AE_INFO, status, |
| 95 | "Unable to initialize general purpose events")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 96 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | } |
| 98 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 99 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | /******************************************************************************* |
| 103 | * |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 104 | * FUNCTION: acpi_ev_install_fadt_gpes |
| 105 | * |
| 106 | * PARAMETERS: None |
| 107 | * |
| 108 | * RETURN: Status |
| 109 | * |
| 110 | * DESCRIPTION: Completes initialization of the FADT-defined GPE blocks |
| 111 | * (0 and 1). This causes the _PRW methods to be run, so the HW |
| 112 | * must be fully initialized at this point, including global lock |
| 113 | * support. |
| 114 | * |
| 115 | ******************************************************************************/ |
| 116 | |
| 117 | acpi_status acpi_ev_install_fadt_gpes(void) |
| 118 | { |
| 119 | acpi_status status; |
| 120 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 121 | ACPI_FUNCTION_TRACE(ev_install_fadt_gpes); |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 122 | |
| 123 | /* Namespace must be locked */ |
| 124 | |
| 125 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 126 | if (ACPI_FAILURE(status)) { |
| 127 | return (status); |
| 128 | } |
| 129 | |
| 130 | /* FADT GPE Block 0 */ |
| 131 | |
| 132 | (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device, |
| 133 | acpi_gbl_gpe_fadt_blocks[0]); |
| 134 | |
| 135 | /* FADT GPE Block 1 */ |
| 136 | |
| 137 | (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device, |
| 138 | acpi_gbl_gpe_fadt_blocks[1]); |
| 139 | |
| 140 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 141 | return_ACPI_STATUS(AE_OK); |
| 142 | } |
| 143 | |
| 144 | /******************************************************************************* |
| 145 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | * FUNCTION: acpi_ev_install_xrupt_handlers |
| 147 | * |
| 148 | * PARAMETERS: None |
| 149 | * |
| 150 | * RETURN: Status |
| 151 | * |
| 152 | * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock |
| 153 | * |
| 154 | ******************************************************************************/ |
| 155 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 156 | acpi_status acpi_ev_install_xrupt_handlers(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 158 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 160 | ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
| 162 | /* Install the SCI handler */ |
| 163 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | status = acpi_ev_install_sci_handler(); |
| 165 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 166 | ACPI_EXCEPTION((AE_INFO, status, |
| 167 | "Unable to install System Control Interrupt handler")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 168 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | /* Install the handler for the Global Lock */ |
| 172 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 173 | status = acpi_ev_init_global_lock_handler(); |
| 174 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 175 | ACPI_EXCEPTION((AE_INFO, status, |
| 176 | "Unable to initialize Global Lock handler")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 177 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | acpi_gbl_events_initialized = TRUE; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 181 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | } |
| 183 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | /******************************************************************************* |
| 185 | * |
| 186 | * FUNCTION: acpi_ev_fixed_event_initialize |
| 187 | * |
| 188 | * PARAMETERS: None |
| 189 | * |
| 190 | * RETURN: Status |
| 191 | * |
| 192 | * DESCRIPTION: Install the fixed event handlers and enable the fixed events. |
| 193 | * |
| 194 | ******************************************************************************/ |
| 195 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 196 | static acpi_status acpi_ev_fixed_event_initialize(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 198 | acpi_native_uint i; |
| 199 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | /* |
| 202 | * Initialize the structure that keeps track of fixed event handlers |
| 203 | * and enable the fixed events. |
| 204 | */ |
| 205 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { |
| 206 | acpi_gbl_fixed_event_handlers[i].handler = NULL; |
| 207 | acpi_gbl_fixed_event_handlers[i].context = NULL; |
| 208 | |
| 209 | /* Enable the fixed event */ |
| 210 | |
| 211 | if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 212 | status = |
| 213 | acpi_set_register(acpi_gbl_fixed_event_info[i]. |
| 214 | enable_register_id, 0, |
| 215 | ACPI_MTX_LOCK); |
| 216 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | return (status); |
| 218 | } |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | return (AE_OK); |
| 223 | } |
| 224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | /******************************************************************************* |
| 226 | * |
| 227 | * FUNCTION: acpi_ev_fixed_event_detect |
| 228 | * |
| 229 | * PARAMETERS: None |
| 230 | * |
| 231 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
| 232 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 233 | * DESCRIPTION: Checks the PM status register for active fixed events |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | * |
| 235 | ******************************************************************************/ |
| 236 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 237 | u32 acpi_ev_fixed_event_detect(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 239 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
| 240 | u32 fixed_status; |
| 241 | u32 fixed_enable; |
| 242 | acpi_native_uint i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 244 | ACPI_FUNCTION_NAME(ev_fixed_event_detect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | /* |
| 247 | * Read the fixed feature status and enable registers, as all the cases |
| 248 | * depend on their values. Ignore errors here. |
| 249 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 250 | (void)acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
| 251 | ACPI_REGISTER_PM1_STATUS, &fixed_status); |
| 252 | (void)acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
| 253 | ACPI_REGISTER_PM1_ENABLE, &fixed_enable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 255 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
| 256 | "Fixed Event Block: Enable %08X Status %08X\n", |
| 257 | fixed_enable, fixed_status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
| 259 | /* |
| 260 | * Check for all possible Fixed Events and dispatch those that are active |
| 261 | */ |
| 262 | for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | /* Both the status and enable bits must be on for this event */ |
| 265 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 266 | if ((fixed_status & acpi_gbl_fixed_event_info[i]. |
| 267 | status_bit_mask) |
| 268 | && (fixed_enable & acpi_gbl_fixed_event_info[i]. |
| 269 | enable_bit_mask)) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | /* Found an active (signalled) event */ |
| 272 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 273 | int_status |= acpi_ev_fixed_event_dispatch((u32) i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | } |
| 275 | } |
| 276 | |
| 277 | return (int_status); |
| 278 | } |
| 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | /******************************************************************************* |
| 281 | * |
| 282 | * FUNCTION: acpi_ev_fixed_event_dispatch |
| 283 | * |
| 284 | * PARAMETERS: Event - Event type |
| 285 | * |
| 286 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
| 287 | * |
| 288 | * DESCRIPTION: Clears the status bit for the requested event, calls the |
| 289 | * handler that previously registered for the event. |
| 290 | * |
| 291 | ******************************************************************************/ |
| 292 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 293 | static u32 acpi_ev_fixed_event_dispatch(u32 event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | { |
| 295 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 296 | ACPI_FUNCTION_ENTRY(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
| 298 | /* Clear the status bit */ |
| 299 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 300 | (void)acpi_set_register(acpi_gbl_fixed_event_info[event]. |
| 301 | status_register_id, 1, ACPI_MTX_DO_NOT_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
| 303 | /* |
| 304 | * Make sure we've got a handler. If not, report an error. |
| 305 | * The event is disabled to prevent further interrupts. |
| 306 | */ |
| 307 | if (NULL == acpi_gbl_fixed_event_handlers[event].handler) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 308 | (void)acpi_set_register(acpi_gbl_fixed_event_info[event]. |
| 309 | enable_register_id, 0, |
| 310 | ACPI_MTX_DO_NOT_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 312 | ACPI_ERROR((AE_INFO, |
| 313 | "No installed handler for fixed event [%08X]", |
| 314 | event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | return (ACPI_INTERRUPT_NOT_HANDLED); |
| 317 | } |
| 318 | |
| 319 | /* Invoke the Fixed Event handler */ |
| 320 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 321 | return ((acpi_gbl_fixed_event_handlers[event]. |
| 322 | handler) (acpi_gbl_fixed_event_handlers[event].context)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | } |