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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 | /****************************************************************************** * * Module Name: hwgpe - Low level GPE enable/disable/clear functions * $Revision: 40 $ * *****************************************************************************/ /* * Copyright (C) 2000 - 2002, R. Byron Moore * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "acpi.h" #include "achware.h" #include "acnamesp.h" #include "acevents.h" #define _COMPONENT ACPI_HARDWARE ACPI_MODULE_NAME ("hwgpe") /****************************************************************************** * * FUNCTION: Acpi_hw_get_gpe_bit_mask * * PARAMETERS: Gpe_number - The GPE * * RETURN: Gpe register bitmask for this gpe level * * DESCRIPTION: Get the bitmask for this GPE * ******************************************************************************/ u32 acpi_hw_get_gpe_bit_mask ( u32 gpe_number) { return (acpi_gbl_gpe_number_info [acpi_ev_get_gpe_number_index (gpe_number)].bit_mask); } /****************************************************************************** * * FUNCTION: Acpi_hw_enable_gpe * * PARAMETERS: Gpe_number - The GPE * * RETURN: None * * DESCRIPTION: Enable a single GPE. * ******************************************************************************/ void acpi_hw_enable_gpe ( u32 gpe_number) { u32 in_byte; u32 register_index; u32 bit_mask; ACPI_FUNCTION_ENTRY (); /* Translate GPE number to index into global registers array. */ register_index = acpi_ev_get_gpe_register_index (gpe_number); /* Get the register bitmask for this GPE */ bit_mask = acpi_hw_get_gpe_bit_mask (gpe_number); /* * Read the current value of the register, set the appropriate bit * to enable the GPE, and write out the new register. */ in_byte = acpi_hw_low_level_read (8, &acpi_gbl_gpe_register_info[register_index].enable_address, 0); acpi_hw_low_level_write (8, (in_byte | bit_mask), &acpi_gbl_gpe_register_info[register_index].enable_address, 0); } /****************************************************************************** * * FUNCTION: Acpi_hw_enable_gpe_for_wakeup * * PARAMETERS: Gpe_number - The GPE * * RETURN: None * * DESCRIPTION: Keep track of which GPEs the OS has requested not be * disabled when going to sleep. * ******************************************************************************/ void acpi_hw_enable_gpe_for_wakeup ( u32 gpe_number) { u32 register_index; u32 bit_mask; ACPI_FUNCTION_ENTRY (); /* Translate GPE number to index into global registers array. */ register_index = acpi_ev_get_gpe_register_index (gpe_number); /* Get the register bitmask for this GPE */ bit_mask = acpi_hw_get_gpe_bit_mask (gpe_number); /* * Set the bit so we will not disable this when sleeping */ acpi_gbl_gpe_register_info[register_index].wake_enable |= bit_mask; } /****************************************************************************** * * FUNCTION: Acpi_hw_disable_gpe * * PARAMETERS: Gpe_number - The GPE * * RETURN: None * * DESCRIPTION: Disable a single GPE. * ******************************************************************************/ void acpi_hw_disable_gpe ( u32 gpe_number) { u32 in_byte; u32 register_index; u32 bit_mask; ACPI_FUNCTION_ENTRY (); /* Translate GPE number to index into global registers array. */ register_index = acpi_ev_get_gpe_register_index (gpe_number); /* Get the register bitmask for this GPE */ bit_mask = acpi_hw_get_gpe_bit_mask (gpe_number); /* * Read the current value of the register, clear the appropriate bit, * and write out the new register value to disable the GPE. */ in_byte = acpi_hw_low_level_read (8, &acpi_gbl_gpe_register_info[register_index].enable_address, 0); acpi_hw_low_level_write (8, (in_byte & ~bit_mask), &acpi_gbl_gpe_register_info[register_index].enable_address, 0); acpi_hw_disable_gpe_for_wakeup(gpe_number); } /****************************************************************************** * * FUNCTION: Acpi_hw_disable_gpe_for_wakeup * * PARAMETERS: Gpe_number - The GPE * * RETURN: None * * DESCRIPTION: Keep track of which GPEs the OS has requested not be * disabled when going to sleep. * ******************************************************************************/ void acpi_hw_disable_gpe_for_wakeup ( u32 gpe_number) { u32 register_index; u32 bit_mask; ACPI_FUNCTION_ENTRY (); /* Translate GPE number to index into global registers array. */ register_index = acpi_ev_get_gpe_register_index (gpe_number); /* Get the register bitmask for this GPE */ bit_mask = acpi_hw_get_gpe_bit_mask (gpe_number); /* * Clear the bit so we will disable this when sleeping */ acpi_gbl_gpe_register_info[register_index].wake_enable &= ~bit_mask; } /****************************************************************************** * * FUNCTION: Acpi_hw_clear_gpe * * PARAMETERS: Gpe_number - The GPE * * RETURN: None * * DESCRIPTION: Clear a single GPE. * ******************************************************************************/ void acpi_hw_clear_gpe ( u32 gpe_number) { u32 register_index; u32 bit_mask; ACPI_FUNCTION_ENTRY (); /* Translate GPE number to index into global registers array. */ register_index = acpi_ev_get_gpe_register_index (gpe_number); /* Get the register bitmask for this GPE */ bit_mask = acpi_hw_get_gpe_bit_mask (gpe_number); /* * Write a one to the appropriate bit in the status register to * clear this GPE. */ acpi_hw_low_level_write (8, bit_mask, &acpi_gbl_gpe_register_info[register_index].status_address, 0); } /****************************************************************************** * * FUNCTION: Acpi_hw_get_gpe_status * * PARAMETERS: Gpe_number - The GPE * * RETURN: None * * DESCRIPTION: Return the status of a single GPE. * ******************************************************************************/ void acpi_hw_get_gpe_status ( u32 gpe_number, acpi_event_status *event_status) { u32 in_byte = 0; u32 register_index = 0; u32 bit_mask = 0; ACPI_GPE_REGISTER_INFO *gpe_register_info; ACPI_FUNCTION_ENTRY (); if (!event_status) { return; } (*event_status) = 0; /* Translate GPE number to index into global registers array. */ register_index = acpi_ev_get_gpe_register_index (gpe_number); gpe_register_info = &acpi_gbl_gpe_register_info[register_index]; /* Get the register bitmask for this GPE */ bit_mask = acpi_hw_get_gpe_bit_mask (gpe_number); /* GPE Enabled? */ in_byte = acpi_hw_low_level_read (8, &gpe_register_info->enable_address, 0); if (bit_mask & in_byte) { (*event_status) |= ACPI_EVENT_FLAG_ENABLED; } /* GPE Enabled for wake? */ if (bit_mask & gpe_register_info->wake_enable) { (*event_status) |= ACPI_EVENT_FLAG_WAKE_ENABLED; } /* GPE active (set)? */ in_byte = acpi_hw_low_level_read (8, &gpe_register_info->status_address, 0); if (bit_mask & in_byte) { (*event_status) |= ACPI_EVENT_FLAG_SET; } } /****************************************************************************** * * FUNCTION: Acpi_hw_disable_non_wakeup_gpes * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Disable all non-wakeup GPEs * Call with interrupts disabled. The interrupt handler also * modifies Acpi_gbl_Gpe_register_info[i].Enable, so it should not be * given the chance to run until after non-wake GPEs are * re-enabled. * ******************************************************************************/ void acpi_hw_disable_non_wakeup_gpes ( void) { u32 i; ACPI_GPE_REGISTER_INFO *gpe_register_info; ACPI_FUNCTION_ENTRY (); for (i = 0; i < acpi_gbl_gpe_register_count; i++) { gpe_register_info = &acpi_gbl_gpe_register_info[i]; /* * Read the enabled status of all GPEs. We * will be using it to restore all the GPEs later. */ gpe_register_info->enable = (u8) acpi_hw_low_level_read (8, &gpe_register_info->enable_address, 0); /* * Disable all GPEs except wakeup GPEs. */ acpi_hw_low_level_write (8, gpe_register_info->wake_enable, &gpe_register_info->enable_address, 0); } } /****************************************************************************** * * FUNCTION: Acpi_hw_enable_non_wakeup_gpes * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Enable all non-wakeup GPEs we previously enabled. * ******************************************************************************/ void acpi_hw_enable_non_wakeup_gpes ( void) { u32 i; ACPI_GPE_REGISTER_INFO *gpe_register_info; ACPI_FUNCTION_ENTRY (); for (i = 0; i < acpi_gbl_gpe_register_count; i++) { gpe_register_info = &acpi_gbl_gpe_register_info[i]; /* * We previously stored the enabled status of all GPEs. * Blast them back in. */ acpi_hw_low_level_write (8, gpe_register_info->enable, & gpe_register_info->enable_address, 0); } } |