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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 | /**************************************************************************** * * Module Name: bmpower.c - Driver for ACPI Power Resource 'devices' * $Revision: 14 $ * ****************************************************************************/ /* * Copyright (C) 2000, 2001 Andrew Grover * * 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 */ /* * TBD: 1. Sequencing of power resource list transitions. * 2. Global serialization of power resource transtions (see ACPI * spec section 7.1.2/7.1.3). * 3. Better error handling. */ #include <acpi.h> #include "bm.h" #include "bmpower.h" #define _COMPONENT ACPI_BUS MODULE_NAME ("bmpower") /**************************************************************************** * Function Prototypes ****************************************************************************/ ACPI_STATUS bm_pr_notify ( BM_NOTIFY notify_type, BM_HANDLE device_handle, void **context); ACPI_STATUS bm_pr_request ( BM_REQUEST *request, void *context); /**************************************************************************** * Internal Functions ****************************************************************************/ /**************************************************************************** * * FUNCTION: bm_pr_print * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_print ( BM_POWER_RESOURCE *pr) { ACPI_BUFFER buffer; if (!pr) { return(AE_BAD_PARAMETER); } buffer.length = 256; buffer.pointer = acpi_os_callocate(buffer.length); if (!buffer.pointer) { return(AE_NO_MEMORY); } acpi_get_name(pr->acpi_handle, ACPI_FULL_PATHNAME, &buffer); acpi_os_printf("Power Resource: found\n"); DEBUG_PRINT_RAW(ACPI_INFO, ("+------------------------------------------------------------\n")); DEBUG_PRINT_RAW(ACPI_INFO, ("| PowerResource[%02x]:[%p] %s\n", pr->device_handle, pr->acpi_handle, buffer.pointer)); DEBUG_PRINT_RAW(ACPI_INFO, ("| system_level[S%d] resource_order[%d]\n", pr->system_level, pr->resource_order)); DEBUG_PRINT_RAW(ACPI_INFO, ("| state[D%d] reference_count[%d]\n", pr->state, pr->reference_count)); DEBUG_PRINT_RAW(ACPI_INFO, ("+------------------------------------------------------------\n")); acpi_os_free(buffer.pointer); return(AE_OK); } /**************************************************************************** * * FUNCTION: bm_pr_get_state * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_get_state ( BM_POWER_RESOURCE *pr) { ACPI_STATUS status = AE_OK; BM_DEVICE_STATUS device_status = BM_STATUS_UNKNOWN; FUNCTION_TRACE("bm_pr_get_state"); if (!pr) { return_ACPI_STATUS(AE_BAD_PARAMETER); } pr->state = ACPI_STATE_UNKNOWN; /* * Evaluate _STA: * -------------- * Evalute _STA to determine whether the power resource is ON or OFF. * Note that if the power resource isn't present we'll get AE_OK but * an unknown status. */ status = bm_get_device_status(pr->device_handle, &device_status); if (ACPI_FAILURE(status)) { DEBUG_PRINT(ACPI_ERROR, ("Error reading status for power resource [%02x].\n", pr->device_handle)); return_ACPI_STATUS(status); } /* * Mask off all bits but the first as some systems return non-standard * values (e.g. 0x51). */ switch (device_status & 0x01) { case 0: DEBUG_PRINT(ACPI_INFO, ("Power resource [%02x] is OFF.\n", pr->device_handle)); pr->state = ACPI_STATE_D3; break; case 1: DEBUG_PRINT(ACPI_INFO, ("Power resource [%02x] is ON.\n", pr->device_handle)); pr->state = ACPI_STATE_D0; break; } return_ACPI_STATUS(status); } /**************************************************************************** * * FUNCTION: bm_pr_set_state * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_set_state ( BM_POWER_RESOURCE *pr, BM_POWER_STATE target_state) { ACPI_STATUS status = AE_OK; FUNCTION_TRACE("bm_pr_set_state"); if (!pr) { return_ACPI_STATUS(AE_BAD_PARAMETER); } status = bm_pr_get_state(pr); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } if (target_state == pr->state) { DEBUG_PRINT(ACPI_INFO, ("Power resource [%02x] already at target power state [D%d].\n", pr->device_handle, pr->state)); return_ACPI_STATUS(AE_OK); } switch (target_state) { case ACPI_STATE_D0: DEBUG_PRINT(ACPI_INFO, ("Turning power resource [%02x] ON.\n", pr->device_handle)); status = bm_evaluate_object(pr->acpi_handle, "_ON", NULL, NULL); break; case ACPI_STATE_D3: DEBUG_PRINT(ACPI_INFO, ("Turning power resource [%02x] OFF.\n", pr->device_handle)); status = bm_evaluate_object(pr->acpi_handle, "_OFF", NULL, NULL); break; default: status = AE_BAD_PARAMETER; break; } status = bm_pr_get_state(pr); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } return_ACPI_STATUS(status); } /**************************************************************************** * * FUNCTION: bm_pr_list_get_state * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_list_get_state ( BM_HANDLE_LIST *pr_list, BM_POWER_STATE *power_state) { ACPI_STATUS status = AE_OK; BM_POWER_RESOURCE *pr = NULL; u32 i = 0; FUNCTION_TRACE("bm_pr_list_get_state"); if (!pr_list || !power_state) { return_ACPI_STATUS(AE_BAD_PARAMETER); } if (pr_list->count < 1) { pr->state = ACPI_STATE_UNKNOWN; return_ACPI_STATUS(AE_ERROR); } (*power_state) = ACPI_STATE_D0; /* * Calculate Current power_state: * ----------------------------- * The current state of a list of power resources is ON if all * power resources are currently in the ON state. In other words, * if any power resource in the list is OFF then the collection * isn't fully ON. */ for (i = 0; i < pr_list->count; i++) { status = bm_get_device_context(pr_list->handles[i], (BM_DRIVER_CONTEXT*)(&pr)); if (ACPI_FAILURE(status)) { DEBUG_PRINT(ACPI_WARN, ("Invalid reference to power resource [%02x].\n", pr_list->handles[i])); (*power_state) = ACPI_STATE_UNKNOWN; break; } status = bm_pr_get_state(pr); if (ACPI_FAILURE(status)) { (*power_state) = ACPI_STATE_UNKNOWN; break; } if (pr->state != ACPI_STATE_D0) { (*power_state) = pr->state; break; } } return_ACPI_STATUS(status); } /**************************************************************************** * * FUNCTION: bm_pr_list_transition * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_list_transition ( BM_HANDLE_LIST *current_list, BM_HANDLE_LIST *target_list) { ACPI_STATUS status = AE_OK; BM_POWER_RESOURCE *pr = NULL; u32 i = 0; FUNCTION_TRACE("bm_pr_list_transition"); if (!current_list || !target_list) { return_ACPI_STATUS(AE_BAD_PARAMETER); } /* * Reference Target: * ----------------- * Reference all resources for the target power state first (so * the device doesn't get turned off while transitioning). Power * resources that aren't on (new reference count of 1) are turned on. */ for (i = 0; i < target_list->count; i++) { status = bm_get_device_context(target_list->handles[i], (BM_DRIVER_CONTEXT*)(&pr)); if (ACPI_FAILURE(status)) { DEBUG_PRINT(ACPI_WARN, ("Invalid reference to power resource [%02x].\n", target_list->handles[i])); continue; } if (++pr->reference_count == 1) { /* TBD: Need ordering based upon resource_order */ status = bm_pr_set_state(pr, ACPI_STATE_D0); if (ACPI_FAILURE(status)) { /* TBD: How do we handle this? */ DEBUG_PRINT(ACPI_WARN, ("Unable to change power state for power resource [%02x].\n", target_list->handles[i])); } } } /* * Dereference Current: * -------------------- * Dereference all resources for the current power state. Power * resources no longer referenced (new reference count of 0) are * turned off. */ for (i = 0; i < current_list->count; i++) { status = bm_get_device_context(current_list->handles[i], (BM_DRIVER_CONTEXT*)(&pr)); if (ACPI_FAILURE(status)) { DEBUG_PRINT(ACPI_WARN, ("Invalid reference to power resource [%02x].\n", target_list->handles[i])); continue; } if (--pr->reference_count == 0) { /* TBD: Need ordering based upon resource_order */ status = bm_pr_set_state(pr, ACPI_STATE_D3); if (ACPI_FAILURE(status)) { /* TBD: How do we handle this? */ DEBUG_PRINT(ACPI_ERROR, ("Unable to change power state for power resource [%02x].\n", current_list->handles[i])); } } } return_ACPI_STATUS(status); } /**************************************************************************** * * FUNCTION: bm_pr_add_device * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_add_device ( BM_HANDLE device_handle, void **context) { ACPI_STATUS status = AE_OK; BM_POWER_RESOURCE *pr = NULL; BM_DEVICE *device = NULL; ACPI_BUFFER buffer; ACPI_OBJECT acpi_object; FUNCTION_TRACE("bm_pr_add_device"); DEBUG_PRINT(ACPI_INFO, ("Adding power resource [%02x].\n", device_handle)); if (!context || *context) { return_ACPI_STATUS(AE_BAD_PARAMETER); } buffer.length = sizeof(ACPI_OBJECT); buffer.pointer = &acpi_object; /* * Get information on this device. */ status = bm_get_device_info(device_handle, &device); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* * Allocate a new BM_POWER_RESOURCE structure. */ pr = acpi_os_callocate(sizeof(BM_POWER_RESOURCE)); if (!pr) { return_ACPI_STATUS(AE_NO_MEMORY); } pr->device_handle = device->handle; pr->acpi_handle = device->acpi_handle; /* * Get information on this power resource. */ status = acpi_evaluate_object(pr->acpi_handle, NULL, NULL, &buffer); if (ACPI_FAILURE(status)) { goto end; } pr->system_level = acpi_object.power_resource.system_level; pr->resource_order = acpi_object.power_resource.resource_order; pr->state = ACPI_STATE_UNKNOWN; pr->reference_count = 0; /* * Get the power resource's current state (ON|OFF). */ status = bm_pr_get_state(pr); end: if (ACPI_FAILURE(status)) { acpi_os_free(pr); } else { *context = pr; bm_pr_print(pr); } return_ACPI_STATUS(status); } /**************************************************************************** * * FUNCTION: bm_pr_remove_device * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_remove_device ( void **context) { ACPI_STATUS status = AE_OK; BM_POWER_RESOURCE *pr = NULL; FUNCTION_TRACE("bm_pr_remove_device"); if (!context || !*context) { return_ACPI_STATUS(AE_BAD_PARAMETER); } pr = (BM_POWER_RESOURCE*)*context; DEBUG_PRINT(ACPI_INFO, ("Removing power resource [%02x].\n", pr->device_handle)); acpi_os_free(pr); return_ACPI_STATUS(status); } /**************************************************************************** * External Functions ****************************************************************************/ /**************************************************************************** * * FUNCTION: bm_pr_initialize * * PARAMETERS: <none> * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_initialize (void) { ACPI_STATUS status = AE_OK; BM_DEVICE_ID criteria; BM_DRIVER driver; FUNCTION_TRACE("bm_pr_initialize"); MEMSET(&criteria, 0, sizeof(BM_DEVICE_ID)); MEMSET(&driver, 0, sizeof(BM_DRIVER)); criteria.type = BM_TYPE_POWER_RESOURCE; driver.notify = &bm_pr_notify; driver.request = &bm_pr_request; status = bm_register_driver(&criteria, &driver); return_ACPI_STATUS(status); } /**************************************************************************** * * FUNCTION: bm_pr_terminate * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_terminate (void) { ACPI_STATUS status = AE_OK; BM_DEVICE_ID criteria; BM_DRIVER driver; FUNCTION_TRACE("bm_pr_terminate"); MEMSET(&criteria, 0, sizeof(BM_DEVICE_ID)); MEMSET(&driver, 0, sizeof(BM_DRIVER)); criteria.type = BM_TYPE_POWER_RESOURCE; driver.notify = &bm_pr_notify; driver.request = &bm_pr_request; status = bm_unregister_driver(&criteria, &driver); return_ACPI_STATUS(status); } /**************************************************************************** * * FUNCTION: bm_pr_notify * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_notify ( BM_NOTIFY notify_type, BM_HANDLE device_handle, void **context) { ACPI_STATUS status = AE_OK; FUNCTION_TRACE("bm_pr_notify"); switch (notify_type) { case BM_NOTIFY_DEVICE_ADDED: status = bm_pr_add_device(device_handle, context); break; case BM_NOTIFY_DEVICE_REMOVED: status = bm_pr_remove_device(context); break; default: status = AE_SUPPORT; break; } return_ACPI_STATUS(status); } /**************************************************************************** * * FUNCTION: bm_pr_request * * PARAMETERS: * * RETURN: * * DESCRIPTION: * ****************************************************************************/ ACPI_STATUS bm_pr_request ( BM_REQUEST *request, void *context) { ACPI_STATUS status = AE_OK; BM_POWER_RESOURCE *pr = NULL; FUNCTION_TRACE("bm_pr_request"); /* * Must have a valid request structure and context. */ if (!request || !context) { return_ACPI_STATUS(AE_BAD_PARAMETER); } /* * context contains information specific to this power resource. */ pr = (BM_POWER_RESOURCE*)context; /* * Handle request: * --------------- */ switch (request->command) { default: status = AE_SUPPORT; break; } request->status = status; return_ACPI_STATUS(status); } |