1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/ioccom.h> 43 #include <sys/reboot.h> 44 #include <sys/sysctl.h> 45 #include <sys/ctype.h> 46 #include <sys/linker.h> 47 #include <sys/power.h> 48 #include <sys/sbuf.h> 49 #include <sys/smp.h> 50 51 #include <machine/clock.h> 52 #include <machine/resource.h> 53 #include <machine/bus.h> 54 #include <sys/rman.h> 55 #include <isa/isavar.h> 56 #include <isa/pnpvar.h> 57 58 #include <contrib/dev/acpica/acpi.h> 59 #include <dev/acpica/acpivar.h> 60 #include <dev/acpica/acpiio.h> 61 #include <contrib/dev/acpica/acnamesp.h> 62 63 #include "pci_if.h" 64 #include <dev/pci/pcivar.h> 65 #include <dev/pci/pci_private.h> 66 67 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 68 69 /* Hooks for the ACPI CA debugging infrastructure */ 70 #define _COMPONENT ACPI_BUS 71 ACPI_MODULE_NAME("ACPI") 72 73 static d_open_t acpiopen; 74 static d_close_t acpiclose; 75 static d_ioctl_t acpiioctl; 76 77 static struct cdevsw acpi_cdevsw = { 78 .d_version = D_VERSION, 79 .d_open = acpiopen, 80 .d_close = acpiclose, 81 .d_ioctl = acpiioctl, 82 .d_name = "acpi", 83 }; 84 85 /* Global mutex for locking access to the ACPI subsystem. */ 86 struct mtx acpi_mutex; 87 88 /* Bitmap of device quirks. */ 89 int acpi_quirks; 90 91 static int acpi_modevent(struct module *mod, int event, void *junk); 92 static void acpi_identify(driver_t *driver, device_t parent); 93 static int acpi_probe(device_t dev); 94 static int acpi_attach(device_t dev); 95 static int acpi_suspend(device_t dev); 96 static int acpi_resume(device_t dev); 97 static int acpi_shutdown(device_t dev); 98 static device_t acpi_add_child(device_t bus, int order, const char *name, 99 int unit); 100 static int acpi_print_child(device_t bus, device_t child); 101 static void acpi_probe_nomatch(device_t bus, device_t child); 102 static void acpi_driver_added(device_t dev, driver_t *driver); 103 static int acpi_read_ivar(device_t dev, device_t child, int index, 104 uintptr_t *result); 105 static int acpi_write_ivar(device_t dev, device_t child, int index, 106 uintptr_t value); 107 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 108 static int acpi_sysres_alloc(device_t dev); 109 static struct resource_list_entry *acpi_sysres_find(device_t dev, int type, 110 u_long addr); 111 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 112 int type, int *rid, u_long start, u_long end, 113 u_long count, u_int flags); 114 static int acpi_release_resource(device_t bus, device_t child, int type, 115 int rid, struct resource *r); 116 static void acpi_delete_resource(device_t bus, device_t child, int type, 117 int rid); 118 static uint32_t acpi_isa_get_logicalid(device_t dev); 119 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 120 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 121 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 122 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 123 ACPI_BUFFER *ret); 124 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 125 int *dstate); 126 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 127 void *context, void **retval); 128 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 129 int max_depth, acpi_scan_cb_t user_fn, void *arg); 130 static int acpi_set_powerstate_method(device_t bus, device_t child, 131 int state); 132 static int acpi_isa_pnp_probe(device_t bus, device_t child, 133 struct isa_pnp_id *ids); 134 static void acpi_probe_children(device_t bus); 135 static int acpi_probe_order(ACPI_HANDLE handle, int *order); 136 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 137 void *context, void **status); 138 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 139 static void acpi_shutdown_final(void *arg, int howto); 140 static void acpi_enable_fixed_events(struct acpi_softc *sc); 141 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 142 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 143 static int acpi_wake_prep_walk(int sstate); 144 static int acpi_wake_sysctl_walk(device_t dev); 145 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 146 static void acpi_system_eventhandler_sleep(void *arg, int state); 147 static void acpi_system_eventhandler_wakeup(void *arg, int state); 148 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 149 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150 static int acpi_pm_func(u_long cmd, void *arg, ...); 151 static int acpi_child_location_str_method(device_t acdev, device_t child, 152 char *buf, size_t buflen); 153 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 154 char *buf, size_t buflen); 155 156 static device_method_t acpi_methods[] = { 157 /* Device interface */ 158 DEVMETHOD(device_identify, acpi_identify), 159 DEVMETHOD(device_probe, acpi_probe), 160 DEVMETHOD(device_attach, acpi_attach), 161 DEVMETHOD(device_shutdown, acpi_shutdown), 162 DEVMETHOD(device_detach, bus_generic_detach), 163 DEVMETHOD(device_suspend, acpi_suspend), 164 DEVMETHOD(device_resume, acpi_resume), 165 166 /* Bus interface */ 167 DEVMETHOD(bus_add_child, acpi_add_child), 168 DEVMETHOD(bus_print_child, acpi_print_child), 169 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 170 DEVMETHOD(bus_driver_added, acpi_driver_added), 171 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 172 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 173 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 174 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 175 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 176 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 177 DEVMETHOD(bus_release_resource, acpi_release_resource), 178 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 179 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 180 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 181 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 182 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 185 186 /* ACPI bus */ 187 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 188 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 189 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 190 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 191 192 /* PCI emulation */ 193 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 194 195 /* ISA emulation */ 196 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 197 198 {0, 0} 199 }; 200 201 static driver_t acpi_driver = { 202 "acpi", 203 acpi_methods, 204 sizeof(struct acpi_softc), 205 }; 206 207 static devclass_t acpi_devclass; 208 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 209 MODULE_VERSION(acpi, 1); 210 211 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 212 213 /* Local pools for managing system resources for ACPI child devices. */ 214 static struct rman acpi_rman_io, acpi_rman_mem; 215 216 #define ACPI_MINIMUM_AWAKETIME 5 217 218 static const char* sleep_state_names[] = { 219 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 220 221 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 222 static char acpi_ca_version[12]; 223 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 224 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 225 226 /* 227 * Allow override of whether methods execute in parallel or not. 228 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 229 * errors for AML that really can't handle parallel method execution. 230 * It is off by default since this breaks recursive methods and 231 * some IBMs use such code. 232 */ 233 static int acpi_serialize_methods; 234 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 235 236 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 237 static int acpi_do_powerstate = 1; 238 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 239 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 240 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 241 242 /* Allow users to override quirks. */ 243 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 244 245 /* 246 * ACPI can only be loaded as a module by the loader; activating it after 247 * system bootstrap time is not useful, and can be fatal to the system. 248 * It also cannot be unloaded, since the entire system bus heirarchy hangs 249 * off it. 250 */ 251 static int 252 acpi_modevent(struct module *mod, int event, void *junk) 253 { 254 switch (event) { 255 case MOD_LOAD: 256 if (!cold) { 257 printf("The ACPI driver cannot be loaded after boot.\n"); 258 return (EPERM); 259 } 260 break; 261 case MOD_UNLOAD: 262 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 263 return (EBUSY); 264 break; 265 default: 266 break; 267 } 268 return (0); 269 } 270 271 /* 272 * Perform early initialization. 273 */ 274 ACPI_STATUS 275 acpi_Startup(void) 276 { 277 static int started = 0; 278 int error, val; 279 280 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 281 282 /* Only run the startup code once. The MADT driver also calls this. */ 283 if (started) 284 return_VALUE (0); 285 started = 1; 286 287 /* Initialise the ACPI mutex */ 288 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 289 290 /* 291 * Set the globals from our tunables. This is needed because ACPI-CA 292 * uses UINT8 for some values and we have no tunable_byte. 293 */ 294 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 295 AcpiGbl_EnableInterpreterSlack = TRUE; 296 297 /* Start up the ACPI CA subsystem. */ 298 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 299 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 300 return_VALUE (error); 301 } 302 303 if (ACPI_FAILURE(error = AcpiLoadTables())) { 304 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 305 AcpiTerminate(); 306 return_VALUE (error); 307 } 308 309 /* Set up any quirks we have for this system. */ 310 if (acpi_quirks == 0) 311 acpi_table_quirks(&acpi_quirks); 312 313 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 314 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 315 acpi_quirks &= ~ACPI_Q_BROKEN; 316 if (acpi_quirks & ACPI_Q_BROKEN) { 317 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 318 AcpiTerminate(); 319 return_VALUE (AE_ERROR); 320 } 321 322 return_VALUE (AE_OK); 323 } 324 325 /* 326 * Detect ACPI, perform early initialisation 327 */ 328 static void 329 acpi_identify(driver_t *driver, device_t parent) 330 { 331 device_t child; 332 333 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 334 335 if (!cold) 336 return_VOID; 337 338 /* Check that we haven't been disabled with a hint. */ 339 if (resource_disabled("acpi", 0)) 340 return_VOID; 341 342 /* Make sure we're not being doubly invoked. */ 343 if (device_find_child(parent, "acpi", 0) != NULL) 344 return_VOID; 345 346 /* Initialize ACPI-CA. */ 347 if (ACPI_FAILURE(acpi_Startup())) 348 return_VOID; 349 350 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 351 352 /* Attach the actual ACPI device. */ 353 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 354 device_printf(parent, "device_identify failed\n"); 355 return_VOID; 356 } 357 } 358 359 /* 360 * Fetch some descriptive data from ACPI to put in our attach message. 361 */ 362 static int 363 acpi_probe(device_t dev) 364 { 365 ACPI_TABLE_HEADER th; 366 char buf[20]; 367 int error; 368 struct sbuf sb; 369 ACPI_STATUS status; 370 371 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 372 373 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 374 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 375 device_printf(dev, "probe failed, other PM system enabled.\n"); 376 return_VALUE (ENXIO); 377 } 378 379 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 380 device_printf(dev, "couldn't get XSDT header: %s\n", 381 AcpiFormatException(status)); 382 error = ENXIO; 383 } else { 384 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 385 sbuf_bcat(&sb, th.OemId, 6); 386 sbuf_trim(&sb); 387 sbuf_putc(&sb, ' '); 388 sbuf_bcat(&sb, th.OemTableId, 8); 389 sbuf_trim(&sb); 390 sbuf_finish(&sb); 391 device_set_desc_copy(dev, sbuf_data(&sb)); 392 sbuf_delete(&sb); 393 error = 0; 394 } 395 396 return_VALUE (error); 397 } 398 399 static int 400 acpi_attach(device_t dev) 401 { 402 struct acpi_softc *sc; 403 ACPI_STATUS status; 404 int error, state; 405 UINT32 flags; 406 UINT8 TypeA, TypeB; 407 char *env; 408 409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 410 411 sc = device_get_softc(dev); 412 sc->acpi_dev = dev; 413 414 /* Initialize resource manager. */ 415 acpi_rman_io.rm_type = RMAN_ARRAY; 416 acpi_rman_io.rm_start = 0; 417 acpi_rman_io.rm_end = 0xffff; 418 acpi_rman_io.rm_descr = "I/O ports"; 419 if (rman_init(&acpi_rman_io) != 0) 420 panic("acpi rman_init IO ports failed"); 421 acpi_rman_mem.rm_type = RMAN_ARRAY; 422 acpi_rman_mem.rm_start = 0; 423 acpi_rman_mem.rm_end = ~0ul; 424 acpi_rman_mem.rm_descr = "I/O memory addresses"; 425 if (rman_init(&acpi_rman_mem) != 0) 426 panic("acpi rman_init memory failed"); 427 428 /* Install the default address space handlers. */ 429 error = ENXIO; 430 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 431 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 432 if (ACPI_FAILURE(status)) { 433 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 434 AcpiFormatException(status)); 435 goto out; 436 } 437 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 438 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 439 if (ACPI_FAILURE(status)) { 440 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 441 AcpiFormatException(status)); 442 goto out; 443 } 444 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 445 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 446 if (ACPI_FAILURE(status)) { 447 device_printf(dev, "could not initialise PciConfig handler: %s\n", 448 AcpiFormatException(status)); 449 goto out; 450 } 451 452 /* 453 * Note that some systems (specifically, those with namespace evaluation 454 * issues that require the avoidance of parts of the namespace) must 455 * avoid running _INI and _STA on everything, as well as dodging the final 456 * object init pass. 457 * 458 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 459 * 460 * XXX We should arrange for the object init pass after we have attached 461 * all our child devices, but on many systems it works here. 462 */ 463 flags = 0; 464 if (testenv("debug.acpi.avoid")) 465 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 466 467 /* Bring the hardware and basic handlers online. */ 468 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 469 device_printf(dev, "Could not enable ACPI: %s\n", 470 AcpiFormatException(status)); 471 goto out; 472 } 473 474 /* 475 * Call the ECDT probe function to provide EC functionality before 476 * the namespace has been evaluated. 477 */ 478 acpi_ec_ecdt_probe(dev); 479 480 /* Bring device objects and regions online. */ 481 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 482 device_printf(dev, "Could not initialize ACPI objects: %s\n", 483 AcpiFormatException(status)); 484 goto out; 485 } 486 487 /* 488 * Setup our sysctl tree. 489 * 490 * XXX: This doesn't check to make sure that none of these fail. 491 */ 492 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 493 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 494 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 495 device_get_name(dev), CTLFLAG_RD, 0, ""); 496 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 497 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 498 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 499 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 500 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 501 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 502 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 503 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 504 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 505 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 506 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 507 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 508 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 509 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 510 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 511 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 512 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 513 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 514 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 515 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 516 &sc->acpi_sleep_delay, 0, "sleep delay"); 517 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 518 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 519 &sc->acpi_s4bios, 0, "S4BIOS mode"); 520 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 521 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 522 &sc->acpi_verbose, 0, "verbose mode"); 523 524 /* 525 * Default to 1 second before sleeping to give some machines time to 526 * stabilize. 527 */ 528 sc->acpi_sleep_delay = 1; 529 if (bootverbose) 530 sc->acpi_verbose = 1; 531 if ((env = getenv("hw.acpi.verbose")) != NULL) { 532 if (strcmp(env, "0") != 0) 533 sc->acpi_verbose = 1; 534 freeenv(env); 535 } 536 537 /* Only enable S4BIOS by default if the FACS says it is available. */ 538 if (AcpiGbl_FACS->S4Bios_f != 0) 539 sc->acpi_s4bios = 1; 540 541 /* 542 * Dispatch the default sleep state to devices. The lid switch is set 543 * to NONE by default to avoid surprising users. 544 */ 545 sc->acpi_power_button_sx = ACPI_STATE_S5; 546 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 547 sc->acpi_standby_sx = ACPI_STATE_S1; 548 sc->acpi_suspend_sx = ACPI_STATE_S3; 549 550 /* Pick the first valid sleep state for the sleep button default. */ 551 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 552 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 553 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 554 sc->acpi_sleep_button_sx = state; 555 break; 556 } 557 558 acpi_enable_fixed_events(sc); 559 560 /* 561 * Scan the namespace and attach/initialise children. 562 */ 563 564 /* Register our shutdown handler. */ 565 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 566 SHUTDOWN_PRI_LAST); 567 568 /* 569 * Register our acpi event handlers. 570 * XXX should be configurable eg. via userland policy manager. 571 */ 572 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 573 sc, ACPI_EVENT_PRI_LAST); 574 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 575 sc, ACPI_EVENT_PRI_LAST); 576 577 /* Flag our initial states. */ 578 sc->acpi_enabled = 1; 579 sc->acpi_sstate = ACPI_STATE_S0; 580 sc->acpi_sleep_disabled = 0; 581 582 /* Create the control device */ 583 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 584 "acpi"); 585 sc->acpi_dev_t->si_drv1 = sc; 586 587 if ((error = acpi_machdep_init(dev))) 588 goto out; 589 590 /* Register ACPI again to pass the correct argument of pm_func. */ 591 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 592 593 if (!acpi_disabled("bus")) 594 acpi_probe_children(dev); 595 596 error = 0; 597 598 out: 599 return_VALUE (error); 600 } 601 602 static int 603 acpi_suspend(device_t dev) 604 { 605 device_t child, *devlist; 606 int error, i, numdevs, pstate; 607 608 GIANT_REQUIRED; 609 610 /* First give child devices a chance to suspend. */ 611 error = bus_generic_suspend(dev); 612 if (error) 613 return (error); 614 615 /* 616 * Now, set them into the appropriate power state, usually D3. If the 617 * device has an _SxD method for the next sleep state, use that power 618 * state instead. 619 */ 620 device_get_children(dev, &devlist, &numdevs); 621 for (i = 0; i < numdevs; i++) { 622 /* If the device is not attached, we've powered it down elsewhere. */ 623 child = devlist[i]; 624 if (!device_is_attached(child)) 625 continue; 626 627 /* 628 * Default to D3 for all sleep states. The _SxD method is optional 629 * so set the powerstate even if it's absent. 630 */ 631 pstate = PCI_POWERSTATE_D3; 632 error = acpi_device_pwr_for_sleep(device_get_parent(child), 633 child, &pstate); 634 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 635 pci_set_powerstate(child, pstate); 636 } 637 free(devlist, M_TEMP); 638 error = 0; 639 640 return (error); 641 } 642 643 static int 644 acpi_resume(device_t dev) 645 { 646 ACPI_HANDLE handle; 647 int i, numdevs; 648 device_t child, *devlist; 649 650 GIANT_REQUIRED; 651 652 /* 653 * Put all devices in D0 before resuming them. Call _S0D on each one 654 * since some systems expect this. 655 */ 656 device_get_children(dev, &devlist, &numdevs); 657 for (i = 0; i < numdevs; i++) { 658 child = devlist[i]; 659 handle = acpi_get_handle(child); 660 if (handle) 661 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 662 if (device_is_attached(child) && acpi_do_powerstate) 663 pci_set_powerstate(child, PCI_POWERSTATE_D0); 664 } 665 free(devlist, M_TEMP); 666 667 return (bus_generic_resume(dev)); 668 } 669 670 static int 671 acpi_shutdown(device_t dev) 672 { 673 674 GIANT_REQUIRED; 675 676 /* Allow children to shutdown first. */ 677 bus_generic_shutdown(dev); 678 679 /* 680 * Enable any GPEs that are able to power-on the system (i.e., RTC). 681 * Also, disable any that are not valid for this state (most). 682 */ 683 acpi_wake_prep_walk(ACPI_STATE_S5); 684 685 return (0); 686 } 687 688 /* 689 * Handle a new device being added 690 */ 691 static device_t 692 acpi_add_child(device_t bus, int order, const char *name, int unit) 693 { 694 struct acpi_device *ad; 695 device_t child; 696 697 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 698 return (NULL); 699 700 resource_list_init(&ad->ad_rl); 701 702 child = device_add_child_ordered(bus, order, name, unit); 703 if (child != NULL) 704 device_set_ivars(child, ad); 705 else 706 free(ad, M_ACPIDEV); 707 return (child); 708 } 709 710 static int 711 acpi_print_child(device_t bus, device_t child) 712 { 713 struct acpi_device *adev = device_get_ivars(child); 714 struct resource_list *rl = &adev->ad_rl; 715 int retval = 0; 716 717 retval += bus_print_child_header(bus, child); 718 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 719 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 720 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 721 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 722 if (device_get_flags(child)) 723 retval += printf(" flags %#x", device_get_flags(child)); 724 retval += bus_print_child_footer(bus, child); 725 726 return (retval); 727 } 728 729 /* 730 * If this device is an ACPI child but no one claimed it, attempt 731 * to power it off. We'll power it back up when a driver is added. 732 * 733 * XXX Disabled for now since many necessary devices (like fdc and 734 * ATA) don't claim the devices we created for them but still expect 735 * them to be powered up. 736 */ 737 static void 738 acpi_probe_nomatch(device_t bus, device_t child) 739 { 740 741 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 742 } 743 744 /* 745 * If a new driver has a chance to probe a child, first power it up. 746 * 747 * XXX Disabled for now (see acpi_probe_nomatch for details). 748 */ 749 static void 750 acpi_driver_added(device_t dev, driver_t *driver) 751 { 752 device_t child, *devlist; 753 int i, numdevs; 754 755 DEVICE_IDENTIFY(driver, dev); 756 device_get_children(dev, &devlist, &numdevs); 757 for (i = 0; i < numdevs; i++) { 758 child = devlist[i]; 759 if (device_get_state(child) == DS_NOTPRESENT) { 760 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 761 if (device_probe_and_attach(child) != 0) 762 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 763 } 764 } 765 free(devlist, M_TEMP); 766 } 767 768 /* Location hint for devctl(8) */ 769 static int 770 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 771 size_t buflen) 772 { 773 struct acpi_device *dinfo = device_get_ivars(child); 774 775 if (dinfo->ad_handle) 776 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 777 else 778 snprintf(buf, buflen, "unknown"); 779 return (0); 780 } 781 782 /* PnP information for devctl(8) */ 783 static int 784 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 785 size_t buflen) 786 { 787 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 788 ACPI_DEVICE_INFO *adinfo; 789 struct acpi_device *dinfo = device_get_ivars(child); 790 char *end; 791 int error; 792 793 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 794 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 795 if (error) 796 snprintf(buf, buflen, "unknown"); 797 else 798 snprintf(buf, buflen, "_HID=%s _UID=%lu", 799 (adinfo->Valid & ACPI_VALID_HID) ? 800 adinfo->HardwareId.Value : "none", 801 (adinfo->Valid & ACPI_VALID_UID) ? 802 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 803 if (adinfo) 804 AcpiOsFree(adinfo); 805 806 return (0); 807 } 808 809 /* 810 * Handle per-device ivars 811 */ 812 static int 813 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 814 { 815 struct acpi_device *ad; 816 817 if ((ad = device_get_ivars(child)) == NULL) { 818 printf("device has no ivars\n"); 819 return (ENOENT); 820 } 821 822 /* ACPI and ISA compatibility ivars */ 823 switch(index) { 824 case ACPI_IVAR_HANDLE: 825 *(ACPI_HANDLE *)result = ad->ad_handle; 826 break; 827 case ACPI_IVAR_MAGIC: 828 *(int *)result = ad->ad_magic; 829 break; 830 case ACPI_IVAR_PRIVATE: 831 *(void **)result = ad->ad_private; 832 break; 833 case ACPI_IVAR_FLAGS: 834 *(int *)result = ad->ad_flags; 835 break; 836 case ISA_IVAR_VENDORID: 837 case ISA_IVAR_SERIAL: 838 case ISA_IVAR_COMPATID: 839 *(int *)result = -1; 840 break; 841 case ISA_IVAR_LOGICALID: 842 *(int *)result = acpi_isa_get_logicalid(child); 843 break; 844 default: 845 return (ENOENT); 846 } 847 848 return (0); 849 } 850 851 static int 852 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 853 { 854 struct acpi_device *ad; 855 856 if ((ad = device_get_ivars(child)) == NULL) { 857 printf("device has no ivars\n"); 858 return (ENOENT); 859 } 860 861 switch(index) { 862 case ACPI_IVAR_HANDLE: 863 ad->ad_handle = (ACPI_HANDLE)value; 864 break; 865 case ACPI_IVAR_MAGIC: 866 ad->ad_magic = (int)value; 867 break; 868 case ACPI_IVAR_PRIVATE: 869 ad->ad_private = (void *)value; 870 break; 871 case ACPI_IVAR_FLAGS: 872 ad->ad_flags = (int)value; 873 break; 874 default: 875 panic("bad ivar write request (%d)", index); 876 return (ENOENT); 877 } 878 879 return (0); 880 } 881 882 /* 883 * Handle child resource allocation/removal 884 */ 885 static struct resource_list * 886 acpi_get_rlist(device_t dev, device_t child) 887 { 888 struct acpi_device *ad; 889 890 ad = device_get_ivars(child); 891 return (&ad->ad_rl); 892 } 893 894 /* 895 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 896 * duplicates, we merge any in the sysresource attach routine. 897 */ 898 static int 899 acpi_sysres_alloc(device_t dev) 900 { 901 struct resource *res; 902 struct resource_list *rl; 903 struct resource_list_entry *rle; 904 struct rman *rm; 905 906 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 907 STAILQ_FOREACH(rle, rl, link) { 908 if (rle->res != NULL) { 909 device_printf(dev, "duplicate resource for %lx\n", rle->start); 910 continue; 911 } 912 913 /* Only memory and IO resources are valid here. */ 914 switch (rle->type) { 915 case SYS_RES_IOPORT: 916 rm = &acpi_rman_io; 917 break; 918 case SYS_RES_MEMORY: 919 rm = &acpi_rman_mem; 920 break; 921 default: 922 continue; 923 } 924 925 /* Pre-allocate resource and add to our rman pool. */ 926 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 927 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 928 if (res != NULL) { 929 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 930 rle->res = res; 931 } else 932 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 933 rle->start, rle->count, rle->type); 934 } 935 return (0); 936 } 937 938 /* Find if we manage a given resource. */ 939 static struct resource_list_entry * 940 acpi_sysres_find(device_t dev, int type, u_long addr) 941 { 942 struct resource_list *rl; 943 struct resource_list_entry *rle; 944 945 ACPI_SERIAL_ASSERT(acpi); 946 947 /* We only consider IO and memory resources for our pool. */ 948 rle = NULL; 949 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) 950 goto out; 951 952 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 953 STAILQ_FOREACH(rle, rl, link) { 954 if (type == rle->type && addr >= rle->start && 955 addr < rle->start + rle->count) 956 break; 957 } 958 959 out: 960 return (rle); 961 } 962 963 static struct resource * 964 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 965 u_long start, u_long end, u_long count, u_int flags) 966 { 967 ACPI_RESOURCE ares; 968 struct acpi_device *ad = device_get_ivars(child); 969 struct resource_list *rl = &ad->ad_rl; 970 struct resource_list_entry *rle; 971 struct resource *res; 972 struct rman *rm; 973 974 res = NULL; 975 ACPI_SERIAL_BEGIN(acpi); 976 977 /* 978 * If this is an allocation of the "default" range for a given RID, and 979 * we know what the resources for this device are (i.e., they're on the 980 * child's resource list), use those start/end values. 981 */ 982 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 983 rle = resource_list_find(rl, type, *rid); 984 if (rle == NULL) 985 goto out; 986 start = rle->start; 987 end = rle->end; 988 count = rle->count; 989 } 990 991 /* If we don't manage this address, pass the request up to the parent. */ 992 rle = acpi_sysres_find(bus, type, start); 993 if (rle == NULL) { 994 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 995 start, end, count, flags); 996 } else { 997 998 /* We only handle memory and IO resources through rman. */ 999 switch (type) { 1000 case SYS_RES_IOPORT: 1001 rm = &acpi_rman_io; 1002 break; 1003 case SYS_RES_MEMORY: 1004 rm = &acpi_rman_mem; 1005 break; 1006 default: 1007 panic("acpi_alloc_resource: invalid res type %d", type); 1008 } 1009 1010 /* If we do know it, allocate it from the local pool. */ 1011 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1012 child); 1013 if (res == NULL) 1014 goto out; 1015 1016 /* Copy the bus tag and handle from the pre-allocated resource. */ 1017 rman_set_bustag(res, rman_get_bustag(rle->res)); 1018 rman_set_bushandle(res, rman_get_start(res)); 1019 1020 /* If requested, activate the resource using the parent's method. */ 1021 if (flags & RF_ACTIVE) 1022 if (bus_activate_resource(child, type, *rid, res) != 0) { 1023 rman_release_resource(res); 1024 res = NULL; 1025 goto out; 1026 } 1027 } 1028 1029 if (res != NULL && device_get_parent(child) == bus) 1030 switch (type) { 1031 case SYS_RES_IRQ: 1032 /* 1033 * Since bus_config_intr() takes immediate effect, we cannot 1034 * configure the interrupt associated with a device when we 1035 * parse the resources but have to defer it until a driver 1036 * actually allocates the interrupt via bus_alloc_resource(). 1037 * 1038 * XXX: Should we handle the lookup failing? 1039 */ 1040 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1041 acpi_config_intr(child, &ares); 1042 break; 1043 } 1044 1045 out: 1046 ACPI_SERIAL_END(acpi); 1047 return (res); 1048 } 1049 1050 static int 1051 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1052 struct resource *r) 1053 { 1054 int ret; 1055 1056 ACPI_SERIAL_BEGIN(acpi); 1057 1058 /* 1059 * If we know about this address, deactivate it and release it to the 1060 * local pool. If we don't, pass this request up to the parent. 1061 */ 1062 if (acpi_sysres_find(bus, type, rman_get_start(r)) == NULL) { 1063 if (rman_get_flags(r) & RF_ACTIVE) { 1064 ret = bus_deactivate_resource(child, type, rid, r); 1065 if (ret != 0) 1066 goto out; 1067 } 1068 ret = rman_release_resource(r); 1069 } else 1070 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1071 1072 out: 1073 ACPI_SERIAL_END(acpi); 1074 return (ret); 1075 } 1076 1077 static void 1078 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1079 { 1080 struct resource_list *rl; 1081 1082 rl = acpi_get_rlist(bus, child); 1083 resource_list_delete(rl, type, rid); 1084 } 1085 1086 /* Allocate an IO port or memory resource, given its GAS. */ 1087 int 1088 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1089 struct resource **res) 1090 { 1091 int error, res_type; 1092 1093 error = ENOMEM; 1094 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1095 return (EINVAL); 1096 1097 /* We only support memory and IO spaces. */ 1098 switch (gas->AddressSpaceId) { 1099 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1100 res_type = SYS_RES_MEMORY; 1101 break; 1102 case ACPI_ADR_SPACE_SYSTEM_IO: 1103 res_type = SYS_RES_IOPORT; 1104 break; 1105 default: 1106 return (EOPNOTSUPP); 1107 } 1108 1109 /* 1110 * If the register width is less than 8, assume the BIOS author means 1111 * it is a bit field and just allocate a byte. 1112 */ 1113 if (gas->RegisterBitWidth && gas->RegisterBitWidth < 8) 1114 gas->RegisterBitWidth = 8; 1115 1116 /* Validate the address after we're sure we support the space. */ 1117 if (!ACPI_VALID_ADDRESS(gas->Address) || gas->RegisterBitWidth == 0) 1118 return (EINVAL); 1119 1120 bus_set_resource(dev, res_type, *rid, gas->Address, 1121 gas->RegisterBitWidth / 8); 1122 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE); 1123 if (*res != NULL) { 1124 *type = res_type; 1125 error = 0; 1126 } else 1127 bus_delete_resource(dev, res_type, *rid); 1128 1129 return (error); 1130 } 1131 1132 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1133 static uint32_t 1134 acpi_isa_get_logicalid(device_t dev) 1135 { 1136 ACPI_DEVICE_INFO *devinfo; 1137 ACPI_BUFFER buf; 1138 ACPI_HANDLE h; 1139 ACPI_STATUS error; 1140 u_int32_t pnpid; 1141 1142 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1143 1144 pnpid = 0; 1145 buf.Pointer = NULL; 1146 buf.Length = ACPI_ALLOCATE_BUFFER; 1147 1148 /* Fetch and validate the HID. */ 1149 if ((h = acpi_get_handle(dev)) == NULL) 1150 goto out; 1151 error = AcpiGetObjectInfo(h, &buf); 1152 if (ACPI_FAILURE(error)) 1153 goto out; 1154 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1155 1156 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1157 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1158 1159 out: 1160 if (buf.Pointer != NULL) 1161 AcpiOsFree(buf.Pointer); 1162 return_VALUE (pnpid); 1163 } 1164 1165 static int 1166 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1167 { 1168 ACPI_DEVICE_INFO *devinfo; 1169 ACPI_BUFFER buf; 1170 ACPI_HANDLE h; 1171 ACPI_STATUS error; 1172 uint32_t *pnpid; 1173 int valid, i; 1174 1175 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1176 1177 pnpid = cids; 1178 valid = 0; 1179 buf.Pointer = NULL; 1180 buf.Length = ACPI_ALLOCATE_BUFFER; 1181 1182 /* Fetch and validate the CID */ 1183 if ((h = acpi_get_handle(dev)) == NULL) 1184 goto out; 1185 error = AcpiGetObjectInfo(h, &buf); 1186 if (ACPI_FAILURE(error)) 1187 goto out; 1188 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1189 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1190 goto out; 1191 1192 if (devinfo->CompatibilityId.Count < count) 1193 count = devinfo->CompatibilityId.Count; 1194 for (i = 0; i < count; i++) { 1195 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1196 continue; 1197 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1198 valid++; 1199 } 1200 1201 out: 1202 if (buf.Pointer != NULL) 1203 AcpiOsFree(buf.Pointer); 1204 return_VALUE (valid); 1205 } 1206 1207 static char * 1208 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1209 { 1210 ACPI_HANDLE h; 1211 int i; 1212 1213 h = acpi_get_handle(dev); 1214 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1215 return (NULL); 1216 1217 /* Try to match one of the array of IDs with a HID or CID. */ 1218 for (i = 0; ids[i] != NULL; i++) { 1219 if (acpi_MatchHid(h, ids[i])) 1220 return (ids[i]); 1221 } 1222 return (NULL); 1223 } 1224 1225 static ACPI_STATUS 1226 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1227 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1228 { 1229 ACPI_HANDLE h; 1230 1231 if (dev == NULL) 1232 h = ACPI_ROOT_OBJECT; 1233 else if ((h = acpi_get_handle(dev)) == NULL) 1234 return (AE_BAD_PARAMETER); 1235 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1236 } 1237 1238 static int 1239 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1240 { 1241 struct acpi_softc *sc; 1242 ACPI_HANDLE handle; 1243 ACPI_STATUS status; 1244 char sxd[8]; 1245 int error; 1246 1247 sc = device_get_softc(bus); 1248 handle = acpi_get_handle(dev); 1249 1250 /* 1251 * XXX If we find these devices, don't try to power them down. 1252 * The serial and IRDA ports on my T23 hang the system when 1253 * set to D3 and it appears that such legacy devices may 1254 * need special handling in their drivers. 1255 */ 1256 if (handle == NULL || 1257 acpi_MatchHid(handle, "PNP0500") || 1258 acpi_MatchHid(handle, "PNP0501") || 1259 acpi_MatchHid(handle, "PNP0502") || 1260 acpi_MatchHid(handle, "PNP0510") || 1261 acpi_MatchHid(handle, "PNP0511")) 1262 return (ENXIO); 1263 1264 /* 1265 * Override next state with the value from _SxD, if present. If no 1266 * dstate argument was provided, don't fetch the return value. 1267 */ 1268 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1269 if (dstate) 1270 status = acpi_GetInteger(handle, sxd, dstate); 1271 else 1272 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1273 1274 switch (status) { 1275 case AE_OK: 1276 error = 0; 1277 break; 1278 case AE_NOT_FOUND: 1279 error = ESRCH; 1280 break; 1281 default: 1282 error = ENXIO; 1283 break; 1284 } 1285 1286 return (error); 1287 } 1288 1289 /* Callback arg for our implementation of walking the namespace. */ 1290 struct acpi_device_scan_ctx { 1291 acpi_scan_cb_t user_fn; 1292 void *arg; 1293 ACPI_HANDLE parent; 1294 }; 1295 1296 static ACPI_STATUS 1297 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1298 { 1299 struct acpi_device_scan_ctx *ctx; 1300 device_t dev, old_dev; 1301 ACPI_STATUS status; 1302 ACPI_OBJECT_TYPE type; 1303 1304 /* 1305 * Skip this device if we think we'll have trouble with it or it is 1306 * the parent where the scan began. 1307 */ 1308 ctx = (struct acpi_device_scan_ctx *)arg; 1309 if (acpi_avoid(h) || h == ctx->parent) 1310 return (AE_OK); 1311 1312 /* If this is not a valid device type (e.g., a method), skip it. */ 1313 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1314 return (AE_OK); 1315 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1316 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1317 return (AE_OK); 1318 1319 /* 1320 * Call the user function with the current device. If it is unchanged 1321 * afterwards, return. Otherwise, we update the handle to the new dev. 1322 */ 1323 old_dev = acpi_get_device(h); 1324 dev = old_dev; 1325 status = ctx->user_fn(h, &dev, level, ctx->arg); 1326 if (ACPI_FAILURE(status) || old_dev == dev) 1327 return (status); 1328 1329 /* Remove the old child and its connection to the handle. */ 1330 if (old_dev != NULL) { 1331 device_delete_child(device_get_parent(old_dev), old_dev); 1332 AcpiDetachData(h, acpi_fake_objhandler); 1333 } 1334 1335 /* Recreate the handle association if the user created a device. */ 1336 if (dev != NULL) 1337 AcpiAttachData(h, acpi_fake_objhandler, dev); 1338 1339 return (AE_OK); 1340 } 1341 1342 static ACPI_STATUS 1343 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1344 acpi_scan_cb_t user_fn, void *arg) 1345 { 1346 ACPI_HANDLE h; 1347 struct acpi_device_scan_ctx ctx; 1348 1349 if (acpi_disabled("children")) 1350 return (AE_OK); 1351 1352 if (dev == NULL) 1353 h = ACPI_ROOT_OBJECT; 1354 else if ((h = acpi_get_handle(dev)) == NULL) 1355 return (AE_BAD_PARAMETER); 1356 ctx.user_fn = user_fn; 1357 ctx.arg = arg; 1358 ctx.parent = h; 1359 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1360 acpi_device_scan_cb, &ctx, NULL)); 1361 } 1362 1363 /* 1364 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1365 * device power states since it's close enough to ACPI. 1366 */ 1367 static int 1368 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1369 { 1370 ACPI_HANDLE h; 1371 ACPI_STATUS status; 1372 int error; 1373 1374 error = 0; 1375 h = acpi_get_handle(child); 1376 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1377 return (EINVAL); 1378 if (h == NULL) 1379 return (0); 1380 1381 /* Ignore errors if the power methods aren't present. */ 1382 status = acpi_pwr_switch_consumer(h, state); 1383 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1384 && status != AE_BAD_PARAMETER) 1385 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1386 state, acpi_name(h), AcpiFormatException(status)); 1387 1388 return (error); 1389 } 1390 1391 static int 1392 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1393 { 1394 int result, cid_count, i; 1395 uint32_t lid, cids[8]; 1396 1397 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1398 1399 /* 1400 * ISA-style drivers attached to ACPI may persist and 1401 * probe manually if we return ENOENT. We never want 1402 * that to happen, so don't ever return it. 1403 */ 1404 result = ENXIO; 1405 1406 /* Scan the supplied IDs for a match */ 1407 lid = acpi_isa_get_logicalid(child); 1408 cid_count = acpi_isa_get_compatid(child, cids, 8); 1409 while (ids && ids->ip_id) { 1410 if (lid == ids->ip_id) { 1411 result = 0; 1412 goto out; 1413 } 1414 for (i = 0; i < cid_count; i++) { 1415 if (cids[i] == ids->ip_id) { 1416 result = 0; 1417 goto out; 1418 } 1419 } 1420 ids++; 1421 } 1422 1423 out: 1424 if (result == 0 && ids->ip_desc) 1425 device_set_desc(child, ids->ip_desc); 1426 1427 return_VALUE (result); 1428 } 1429 1430 /* 1431 * Scan all of the ACPI namespace and attach child devices. 1432 * 1433 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1434 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1435 * However, in violation of the spec, some systems place their PCI link 1436 * devices in \, so we have to walk the whole namespace. We check the 1437 * type of namespace nodes, so this should be ok. 1438 */ 1439 static void 1440 acpi_probe_children(device_t bus) 1441 { 1442 1443 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1444 1445 /* 1446 * Scan the namespace and insert placeholders for all the devices that 1447 * we find. We also probe/attach any early devices. 1448 * 1449 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1450 * we want to create nodes for all devices, not just those that are 1451 * currently present. (This assumes that we don't want to create/remove 1452 * devices as they appear, which might be smarter.) 1453 */ 1454 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1455 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1456 bus, NULL); 1457 1458 /* Pre-allocate resources for our rman from any sysresource devices. */ 1459 acpi_sysres_alloc(bus); 1460 1461 /* Create any static children by calling device identify methods. */ 1462 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1463 bus_generic_probe(bus); 1464 1465 /* Probe/attach all children, created staticly and from the namespace. */ 1466 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1467 bus_generic_attach(bus); 1468 1469 /* 1470 * Some of these children may have attached others as part of their attach 1471 * process (eg. the root PCI bus driver), so rescan. 1472 */ 1473 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1474 bus_generic_attach(bus); 1475 1476 /* Attach wake sysctls. */ 1477 acpi_wake_sysctl_walk(bus); 1478 1479 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1480 return_VOID; 1481 } 1482 1483 /* 1484 * Determine the probe order for a given device and return non-zero if it 1485 * should be attached immediately. 1486 */ 1487 static int 1488 acpi_probe_order(ACPI_HANDLE handle, int *order) 1489 { 1490 int ret; 1491 1492 /* 1493 * 1. I/O port and memory system resource holders 1494 * 2. Embedded controllers (to handle early accesses) 1495 * 3. PCI Link Devices 1496 */ 1497 ret = 0; 1498 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) { 1499 *order = 1; 1500 ret = 1; 1501 } else if (acpi_MatchHid(handle, "PNP0C09")) { 1502 *order = 2; 1503 ret = 1; 1504 } else if (acpi_MatchHid(handle, "PNP0C0F")) { 1505 *order = 3; 1506 ret = 1; 1507 } 1508 1509 return (ret); 1510 } 1511 1512 /* 1513 * Evaluate a child device and determine whether we might attach a device to 1514 * it. 1515 */ 1516 static ACPI_STATUS 1517 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1518 { 1519 ACPI_OBJECT_TYPE type; 1520 device_t bus, child; 1521 int order, probe_now; 1522 char *handle_str, **search; 1523 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1524 1525 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1526 1527 /* Skip this device if we think we'll have trouble with it. */ 1528 if (acpi_avoid(handle)) 1529 return_ACPI_STATUS (AE_OK); 1530 1531 bus = (device_t)context; 1532 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1533 switch (type) { 1534 case ACPI_TYPE_DEVICE: 1535 case ACPI_TYPE_PROCESSOR: 1536 case ACPI_TYPE_THERMAL: 1537 case ACPI_TYPE_POWER: 1538 if (acpi_disabled("children")) 1539 break; 1540 1541 /* 1542 * Since we scan from \, be sure to skip system scope objects. 1543 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1544 */ 1545 handle_str = acpi_name(handle); 1546 for (search = scopes; *search != NULL; search++) { 1547 if (strcmp(handle_str, *search) == 0) 1548 break; 1549 } 1550 if (*search != NULL) 1551 break; 1552 1553 /* 1554 * Create a placeholder device for this node. Sort the placeholder 1555 * so that the probe/attach passes will run breadth-first. Orders 1556 * less than 10 are reserved for special objects (i.e., system 1557 * resources). Larger values are used for all other devices. 1558 */ 1559 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1560 order = (level + 1) * 10; 1561 probe_now = acpi_probe_order(handle, &order); 1562 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1563 if (child == NULL) 1564 break; 1565 1566 /* Associate the handle with the device_t and vice versa. */ 1567 acpi_set_handle(child, handle); 1568 AcpiAttachData(handle, acpi_fake_objhandler, child); 1569 1570 /* 1571 * Check that the device is present. If it's not present, 1572 * leave it disabled (so that we have a device_t attached to 1573 * the handle, but we don't probe it). 1574 * 1575 * XXX PCI link devices sometimes report "present" but not 1576 * "functional" (i.e. if disabled). Go ahead and probe them 1577 * anyway since we may enable them later. 1578 */ 1579 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child) && 1580 !acpi_MatchHid(handle, "PNP0C0F")) { 1581 device_disable(child); 1582 break; 1583 } 1584 1585 /* 1586 * Get the device's resource settings and attach them. 1587 * Note that if the device has _PRS but no _CRS, we need 1588 * to decide when it's appropriate to try to configure the 1589 * device. Ignore the return value here; it's OK for the 1590 * device not to have any resources. 1591 */ 1592 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1593 1594 /* If order was overridden, probe/attach now rather than later. */ 1595 if (probe_now) 1596 device_probe_and_attach(child); 1597 break; 1598 } 1599 } 1600 1601 return_ACPI_STATUS (AE_OK); 1602 } 1603 1604 /* 1605 * AcpiAttachData() requires an object handler but never uses it. This is a 1606 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1607 */ 1608 void 1609 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1610 { 1611 } 1612 1613 static void 1614 acpi_shutdown_final(void *arg, int howto) 1615 { 1616 ACPI_STATUS status; 1617 1618 /* 1619 * XXX Shutdown code should only run on the BSP (cpuid 0). 1620 * Some chipsets do not power off the system correctly if called from 1621 * an AP. 1622 */ 1623 if ((howto & RB_POWEROFF) != 0) { 1624 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1625 if (ACPI_FAILURE(status)) { 1626 printf("AcpiEnterSleepStatePrep failed - %s\n", 1627 AcpiFormatException(status)); 1628 return; 1629 } 1630 printf("Powering system off using ACPI\n"); 1631 ACPI_DISABLE_IRQS(); 1632 status = AcpiEnterSleepState(ACPI_STATE_S5); 1633 if (ACPI_FAILURE(status)) { 1634 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1635 } else { 1636 DELAY(1000000); 1637 printf("ACPI power-off failed - timeout\n"); 1638 } 1639 } else if (panicstr == NULL) { 1640 printf("Shutting down ACPI\n"); 1641 AcpiTerminate(); 1642 } 1643 } 1644 1645 static void 1646 acpi_enable_fixed_events(struct acpi_softc *sc) 1647 { 1648 static int first_time = 1; 1649 1650 /* Enable and clear fixed events and install handlers. */ 1651 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1652 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1653 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1654 acpi_event_power_button_sleep, sc); 1655 if (first_time) 1656 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1657 } 1658 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1659 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1660 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1661 acpi_event_sleep_button_sleep, sc); 1662 if (first_time) 1663 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1664 } 1665 1666 first_time = 0; 1667 } 1668 1669 /* 1670 * Returns true if the device is actually present and should 1671 * be attached to. This requires the present, enabled, UI-visible 1672 * and diagnostics-passed bits to be set. 1673 */ 1674 BOOLEAN 1675 acpi_DeviceIsPresent(device_t dev) 1676 { 1677 ACPI_DEVICE_INFO *devinfo; 1678 ACPI_HANDLE h; 1679 ACPI_BUFFER buf; 1680 ACPI_STATUS error; 1681 int ret; 1682 1683 ret = FALSE; 1684 if ((h = acpi_get_handle(dev)) == NULL) 1685 return (FALSE); 1686 buf.Pointer = NULL; 1687 buf.Length = ACPI_ALLOCATE_BUFFER; 1688 error = AcpiGetObjectInfo(h, &buf); 1689 if (ACPI_FAILURE(error)) 1690 return (FALSE); 1691 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1692 1693 /* If no _STA method, must be present */ 1694 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1695 ret = TRUE; 1696 1697 /* Return true for 'present' and 'functioning' */ 1698 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1699 ret = TRUE; 1700 1701 AcpiOsFree(buf.Pointer); 1702 return (ret); 1703 } 1704 1705 /* 1706 * Returns true if the battery is actually present and inserted. 1707 */ 1708 BOOLEAN 1709 acpi_BatteryIsPresent(device_t dev) 1710 { 1711 ACPI_DEVICE_INFO *devinfo; 1712 ACPI_HANDLE h; 1713 ACPI_BUFFER buf; 1714 ACPI_STATUS error; 1715 int ret; 1716 1717 ret = FALSE; 1718 if ((h = acpi_get_handle(dev)) == NULL) 1719 return (FALSE); 1720 buf.Pointer = NULL; 1721 buf.Length = ACPI_ALLOCATE_BUFFER; 1722 error = AcpiGetObjectInfo(h, &buf); 1723 if (ACPI_FAILURE(error)) 1724 return (FALSE); 1725 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1726 1727 /* If no _STA method, must be present */ 1728 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1729 ret = TRUE; 1730 1731 /* Return true for 'present', 'battery present', and 'functioning' */ 1732 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1733 ret = TRUE; 1734 1735 AcpiOsFree(buf.Pointer); 1736 return (ret); 1737 } 1738 1739 /* 1740 * Match a HID string against a handle 1741 */ 1742 static BOOLEAN 1743 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1744 { 1745 ACPI_DEVICE_INFO *devinfo; 1746 ACPI_BUFFER buf; 1747 ACPI_STATUS error; 1748 int ret, i; 1749 1750 ret = FALSE; 1751 if (hid == NULL || h == NULL) 1752 return (ret); 1753 buf.Pointer = NULL; 1754 buf.Length = ACPI_ALLOCATE_BUFFER; 1755 error = AcpiGetObjectInfo(h, &buf); 1756 if (ACPI_FAILURE(error)) 1757 return (ret); 1758 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1759 1760 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1761 strcmp(hid, devinfo->HardwareId.Value) == 0) 1762 ret = TRUE; 1763 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1764 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1765 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1766 ret = TRUE; 1767 break; 1768 } 1769 } 1770 } 1771 1772 AcpiOsFree(buf.Pointer); 1773 return (ret); 1774 } 1775 1776 /* 1777 * Return the handle of a named object within our scope, ie. that of (parent) 1778 * or one if its parents. 1779 */ 1780 ACPI_STATUS 1781 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1782 { 1783 ACPI_HANDLE r; 1784 ACPI_STATUS status; 1785 1786 /* Walk back up the tree to the root */ 1787 for (;;) { 1788 status = AcpiGetHandle(parent, path, &r); 1789 if (ACPI_SUCCESS(status)) { 1790 *result = r; 1791 return (AE_OK); 1792 } 1793 /* XXX Return error here? */ 1794 if (status != AE_NOT_FOUND) 1795 return (AE_OK); 1796 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1797 return (AE_NOT_FOUND); 1798 parent = r; 1799 } 1800 } 1801 1802 /* Find the difference between two PM tick counts. */ 1803 uint32_t 1804 acpi_TimerDelta(uint32_t end, uint32_t start) 1805 { 1806 uint32_t delta; 1807 1808 if (end >= start) 1809 delta = end - start; 1810 else if (AcpiGbl_FADT->TmrValExt == 0) 1811 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1812 else 1813 delta = ((0xFFFFFFFF - start) + end + 1); 1814 return (delta); 1815 } 1816 1817 /* 1818 * Allocate a buffer with a preset data size. 1819 */ 1820 ACPI_BUFFER * 1821 acpi_AllocBuffer(int size) 1822 { 1823 ACPI_BUFFER *buf; 1824 1825 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1826 return (NULL); 1827 buf->Length = size; 1828 buf->Pointer = (void *)(buf + 1); 1829 return (buf); 1830 } 1831 1832 ACPI_STATUS 1833 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1834 { 1835 ACPI_OBJECT arg1; 1836 ACPI_OBJECT_LIST args; 1837 1838 arg1.Type = ACPI_TYPE_INTEGER; 1839 arg1.Integer.Value = number; 1840 args.Count = 1; 1841 args.Pointer = &arg1; 1842 1843 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1844 } 1845 1846 /* 1847 * Evaluate a path that should return an integer. 1848 */ 1849 ACPI_STATUS 1850 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1851 { 1852 ACPI_STATUS status; 1853 ACPI_BUFFER buf; 1854 ACPI_OBJECT param; 1855 1856 if (handle == NULL) 1857 handle = ACPI_ROOT_OBJECT; 1858 1859 /* 1860 * Assume that what we've been pointed at is an Integer object, or 1861 * a method that will return an Integer. 1862 */ 1863 buf.Pointer = ¶m; 1864 buf.Length = sizeof(param); 1865 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1866 if (ACPI_SUCCESS(status)) { 1867 if (param.Type == ACPI_TYPE_INTEGER) 1868 *number = param.Integer.Value; 1869 else 1870 status = AE_TYPE; 1871 } 1872 1873 /* 1874 * In some applications, a method that's expected to return an Integer 1875 * may instead return a Buffer (probably to simplify some internal 1876 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1877 * convert it into an Integer as best we can. 1878 * 1879 * This is a hack. 1880 */ 1881 if (status == AE_BUFFER_OVERFLOW) { 1882 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1883 status = AE_NO_MEMORY; 1884 } else { 1885 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1886 if (ACPI_SUCCESS(status)) 1887 status = acpi_ConvertBufferToInteger(&buf, number); 1888 AcpiOsFree(buf.Pointer); 1889 } 1890 } 1891 return (status); 1892 } 1893 1894 ACPI_STATUS 1895 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1896 { 1897 ACPI_OBJECT *p; 1898 UINT8 *val; 1899 int i; 1900 1901 p = (ACPI_OBJECT *)bufp->Pointer; 1902 if (p->Type == ACPI_TYPE_INTEGER) { 1903 *number = p->Integer.Value; 1904 return (AE_OK); 1905 } 1906 if (p->Type != ACPI_TYPE_BUFFER) 1907 return (AE_TYPE); 1908 if (p->Buffer.Length > sizeof(int)) 1909 return (AE_BAD_DATA); 1910 1911 *number = 0; 1912 val = p->Buffer.Pointer; 1913 for (i = 0; i < p->Buffer.Length; i++) 1914 *number += val[i] << (i * 8); 1915 return (AE_OK); 1916 } 1917 1918 /* 1919 * Iterate over the elements of an a package object, calling the supplied 1920 * function for each element. 1921 * 1922 * XXX possible enhancement might be to abort traversal on error. 1923 */ 1924 ACPI_STATUS 1925 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1926 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1927 { 1928 ACPI_OBJECT *comp; 1929 int i; 1930 1931 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1932 return (AE_BAD_PARAMETER); 1933 1934 /* Iterate over components */ 1935 i = 0; 1936 comp = pkg->Package.Elements; 1937 for (; i < pkg->Package.Count; i++, comp++) 1938 func(comp, arg); 1939 1940 return (AE_OK); 1941 } 1942 1943 /* 1944 * Find the (index)th resource object in a set. 1945 */ 1946 ACPI_STATUS 1947 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1948 { 1949 ACPI_RESOURCE *rp; 1950 int i; 1951 1952 rp = (ACPI_RESOURCE *)buf->Pointer; 1953 i = index; 1954 while (i-- > 0) { 1955 /* Range check */ 1956 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1957 return (AE_BAD_PARAMETER); 1958 1959 /* Check for terminator */ 1960 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 1961 return (AE_NOT_FOUND); 1962 rp = ACPI_NEXT_RESOURCE(rp); 1963 } 1964 if (resp != NULL) 1965 *resp = rp; 1966 1967 return (AE_OK); 1968 } 1969 1970 /* 1971 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1972 * 1973 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1974 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1975 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1976 * resources. 1977 */ 1978 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1979 1980 ACPI_STATUS 1981 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1982 { 1983 ACPI_RESOURCE *rp; 1984 void *newp; 1985 1986 /* Initialise the buffer if necessary. */ 1987 if (buf->Pointer == NULL) { 1988 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1989 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1990 return (AE_NO_MEMORY); 1991 rp = (ACPI_RESOURCE *)buf->Pointer; 1992 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 1993 rp->Length = 0; 1994 } 1995 if (res == NULL) 1996 return (AE_OK); 1997 1998 /* 1999 * Scan the current buffer looking for the terminator. 2000 * This will either find the terminator or hit the end 2001 * of the buffer and return an error. 2002 */ 2003 rp = (ACPI_RESOURCE *)buf->Pointer; 2004 for (;;) { 2005 /* Range check, don't go outside the buffer */ 2006 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2007 return (AE_BAD_PARAMETER); 2008 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2009 break; 2010 rp = ACPI_NEXT_RESOURCE(rp); 2011 } 2012 2013 /* 2014 * Check the size of the buffer and expand if required. 2015 * 2016 * Required size is: 2017 * size of existing resources before terminator + 2018 * size of new resource and header + 2019 * size of terminator. 2020 * 2021 * Note that this loop should really only run once, unless 2022 * for some reason we are stuffing a *really* huge resource. 2023 */ 2024 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2025 res->Length + ACPI_RS_SIZE_NO_DATA + 2026 ACPI_RS_SIZE_MIN) >= buf->Length) { 2027 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2028 return (AE_NO_MEMORY); 2029 bcopy(buf->Pointer, newp, buf->Length); 2030 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2031 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2032 AcpiOsFree(buf->Pointer); 2033 buf->Pointer = newp; 2034 buf->Length += buf->Length; 2035 } 2036 2037 /* Insert the new resource. */ 2038 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2039 2040 /* And add the terminator. */ 2041 rp = ACPI_NEXT_RESOURCE(rp); 2042 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2043 rp->Length = 0; 2044 2045 return (AE_OK); 2046 } 2047 2048 /* 2049 * Set interrupt model. 2050 */ 2051 ACPI_STATUS 2052 acpi_SetIntrModel(int model) 2053 { 2054 2055 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2056 } 2057 2058 static void 2059 acpi_sleep_enable(void *arg) 2060 { 2061 2062 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2063 } 2064 2065 enum acpi_sleep_state { 2066 ACPI_SS_NONE, 2067 ACPI_SS_GPE_SET, 2068 ACPI_SS_DEV_SUSPEND, 2069 ACPI_SS_SLP_PREP, 2070 ACPI_SS_SLEPT, 2071 }; 2072 2073 /* 2074 * Set the system sleep state 2075 * 2076 * Currently we support S1-S5 but S4 is only S4BIOS 2077 */ 2078 ACPI_STATUS 2079 acpi_SetSleepState(struct acpi_softc *sc, int state) 2080 { 2081 ACPI_STATUS status; 2082 UINT8 TypeA; 2083 UINT8 TypeB; 2084 enum acpi_sleep_state slp_state; 2085 2086 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2087 2088 status = AE_OK; 2089 ACPI_LOCK(acpi); 2090 if (sc->acpi_sleep_disabled) { 2091 if (sc->acpi_sstate != ACPI_STATE_S0) 2092 status = AE_ERROR; 2093 ACPI_UNLOCK(acpi); 2094 printf("acpi: suspend request ignored (not ready yet)\n"); 2095 return (status); 2096 } 2097 sc->acpi_sleep_disabled = 1; 2098 ACPI_UNLOCK(acpi); 2099 2100 /* 2101 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2102 * drivers need this. 2103 */ 2104 mtx_lock(&Giant); 2105 slp_state = ACPI_SS_NONE; 2106 switch (state) { 2107 case ACPI_STATE_S1: 2108 case ACPI_STATE_S2: 2109 case ACPI_STATE_S3: 2110 case ACPI_STATE_S4: 2111 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2112 if (status == AE_NOT_FOUND) { 2113 device_printf(sc->acpi_dev, 2114 "Sleep state S%d not supported by BIOS\n", state); 2115 break; 2116 } else if (ACPI_FAILURE(status)) { 2117 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2118 AcpiFormatException(status)); 2119 break; 2120 } 2121 2122 sc->acpi_sstate = state; 2123 2124 /* Enable any GPEs as appropriate and requested by the user. */ 2125 acpi_wake_prep_walk(state); 2126 slp_state = ACPI_SS_GPE_SET; 2127 2128 /* 2129 * Inform all devices that we are going to sleep. If at least one 2130 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2131 * 2132 * XXX Note that a better two-pass approach with a 'veto' pass 2133 * followed by a "real thing" pass would be better, but the current 2134 * bus interface does not provide for this. 2135 */ 2136 if (DEVICE_SUSPEND(root_bus) != 0) { 2137 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2138 break; 2139 } 2140 slp_state = ACPI_SS_DEV_SUSPEND; 2141 2142 status = AcpiEnterSleepStatePrep(state); 2143 if (ACPI_FAILURE(status)) { 2144 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2145 AcpiFormatException(status)); 2146 break; 2147 } 2148 slp_state = ACPI_SS_SLP_PREP; 2149 2150 if (sc->acpi_sleep_delay > 0) 2151 DELAY(sc->acpi_sleep_delay * 1000000); 2152 2153 if (state != ACPI_STATE_S1) { 2154 acpi_sleep_machdep(sc, state); 2155 2156 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2157 if (state == ACPI_STATE_S4) 2158 AcpiEnable(); 2159 } else { 2160 ACPI_DISABLE_IRQS(); 2161 status = AcpiEnterSleepState(state); 2162 if (ACPI_FAILURE(status)) { 2163 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2164 AcpiFormatException(status)); 2165 break; 2166 } 2167 } 2168 slp_state = ACPI_SS_SLEPT; 2169 break; 2170 case ACPI_STATE_S5: 2171 /* 2172 * Shut down cleanly and power off. This will call us back through the 2173 * shutdown handlers. 2174 */ 2175 shutdown_nice(RB_POWEROFF); 2176 break; 2177 case ACPI_STATE_S0: 2178 default: 2179 status = AE_BAD_PARAMETER; 2180 break; 2181 } 2182 2183 /* 2184 * Back out state according to how far along we got in the suspend 2185 * process. This handles both the error and success cases. 2186 */ 2187 if (slp_state >= ACPI_SS_GPE_SET) { 2188 acpi_wake_prep_walk(state); 2189 sc->acpi_sstate = ACPI_STATE_S0; 2190 } 2191 if (slp_state >= ACPI_SS_SLP_PREP) 2192 AcpiLeaveSleepState(state); 2193 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2194 DEVICE_RESUME(root_bus); 2195 if (slp_state >= ACPI_SS_SLEPT) 2196 acpi_enable_fixed_events(sc); 2197 2198 /* Allow another sleep request after a while. */ 2199 if (state != ACPI_STATE_S5) 2200 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 2201 2202 mtx_unlock(&Giant); 2203 return_ACPI_STATUS (status); 2204 } 2205 2206 /* Initialize a device's wake GPE. */ 2207 int 2208 acpi_wake_init(device_t dev, int type) 2209 { 2210 struct acpi_prw_data prw; 2211 2212 /* Evaluate _PRW to find the GPE. */ 2213 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2214 return (ENXIO); 2215 2216 /* Set the requested type for the GPE (runtime, wake, or both). */ 2217 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2218 device_printf(dev, "set GPE type failed\n"); 2219 return (ENXIO); 2220 } 2221 2222 return (0); 2223 } 2224 2225 /* Enable or disable the device's wake GPE. */ 2226 int 2227 acpi_wake_set_enable(device_t dev, int enable) 2228 { 2229 struct acpi_prw_data prw; 2230 ACPI_HANDLE handle; 2231 ACPI_STATUS status; 2232 int flags; 2233 2234 /* Make sure the device supports waking the system and get the GPE. */ 2235 handle = acpi_get_handle(dev); 2236 if (acpi_parse_prw(handle, &prw) != 0) 2237 return (ENXIO); 2238 2239 flags = acpi_get_flags(dev); 2240 if (enable) { 2241 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2242 if (ACPI_FAILURE(status)) { 2243 device_printf(dev, "enable wake failed\n"); 2244 return (ENXIO); 2245 } 2246 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2247 } else { 2248 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2249 if (ACPI_FAILURE(status)) { 2250 device_printf(dev, "disable wake failed\n"); 2251 return (ENXIO); 2252 } 2253 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2254 } 2255 2256 return (0); 2257 } 2258 2259 static int 2260 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2261 { 2262 struct acpi_prw_data prw; 2263 device_t dev; 2264 2265 /* Check that this is a wake-capable device and get its GPE. */ 2266 if (acpi_parse_prw(handle, &prw) != 0) 2267 return (ENXIO); 2268 dev = acpi_get_device(handle); 2269 2270 /* 2271 * The destination sleep state must be less than (i.e., higher power) 2272 * or equal to the value specified by _PRW. If this GPE cannot be 2273 * enabled for the next sleep state, then disable it. If it can and 2274 * the user requested it be enabled, turn on any required power resources 2275 * and set _PSW. 2276 */ 2277 if (sstate > prw.lowest_wake) { 2278 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2279 if (bootverbose) 2280 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2281 acpi_name(handle), sstate); 2282 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2283 acpi_pwr_wake_enable(handle, 1); 2284 acpi_SetInteger(handle, "_PSW", 1); 2285 if (bootverbose) 2286 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2287 acpi_name(handle), sstate); 2288 } 2289 2290 return (0); 2291 } 2292 2293 static int 2294 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2295 { 2296 struct acpi_prw_data prw; 2297 device_t dev; 2298 2299 /* 2300 * Check that this is a wake-capable device and get its GPE. Return 2301 * now if the user didn't enable this device for wake. 2302 */ 2303 if (acpi_parse_prw(handle, &prw) != 0) 2304 return (ENXIO); 2305 dev = acpi_get_device(handle); 2306 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2307 return (0); 2308 2309 /* 2310 * If this GPE couldn't be enabled for the previous sleep state, it was 2311 * disabled before going to sleep so re-enable it. If it was enabled, 2312 * clear _PSW and turn off any power resources it used. 2313 */ 2314 if (sstate > prw.lowest_wake) { 2315 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2316 if (bootverbose) 2317 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2318 } else { 2319 acpi_SetInteger(handle, "_PSW", 0); 2320 acpi_pwr_wake_enable(handle, 0); 2321 if (bootverbose) 2322 device_printf(dev, "run_prep cleaned up for %s\n", 2323 acpi_name(handle)); 2324 } 2325 2326 return (0); 2327 } 2328 2329 static ACPI_STATUS 2330 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2331 { 2332 int sstate; 2333 2334 /* If suspending, run the sleep prep function, otherwise wake. */ 2335 sstate = *(int *)context; 2336 if (AcpiGbl_SystemAwakeAndRunning) 2337 acpi_wake_sleep_prep(handle, sstate); 2338 else 2339 acpi_wake_run_prep(handle, sstate); 2340 return (AE_OK); 2341 } 2342 2343 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2344 static int 2345 acpi_wake_prep_walk(int sstate) 2346 { 2347 ACPI_HANDLE sb_handle; 2348 2349 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2350 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2351 acpi_wake_prep, &sstate, NULL); 2352 return (0); 2353 } 2354 2355 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2356 static int 2357 acpi_wake_sysctl_walk(device_t dev) 2358 { 2359 int error, i, numdevs; 2360 device_t *devlist; 2361 device_t child; 2362 ACPI_STATUS status; 2363 2364 error = device_get_children(dev, &devlist, &numdevs); 2365 if (error != 0 || numdevs == 0) { 2366 if (numdevs == 0) 2367 free(devlist, M_TEMP); 2368 return (error); 2369 } 2370 for (i = 0; i < numdevs; i++) { 2371 child = devlist[i]; 2372 acpi_wake_sysctl_walk(child); 2373 if (!device_is_attached(child)) 2374 continue; 2375 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2376 if (ACPI_SUCCESS(status)) { 2377 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2378 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2379 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2380 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2381 } 2382 } 2383 free(devlist, M_TEMP); 2384 2385 return (0); 2386 } 2387 2388 /* Enable or disable wake from userland. */ 2389 static int 2390 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2391 { 2392 int enable, error; 2393 device_t dev; 2394 2395 dev = (device_t)arg1; 2396 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2397 2398 error = sysctl_handle_int(oidp, &enable, 0, req); 2399 if (error != 0 || req->newptr == NULL) 2400 return (error); 2401 if (enable != 0 && enable != 1) 2402 return (EINVAL); 2403 2404 return (acpi_wake_set_enable(dev, enable)); 2405 } 2406 2407 /* Parse a device's _PRW into a structure. */ 2408 int 2409 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2410 { 2411 ACPI_STATUS status; 2412 ACPI_BUFFER prw_buffer; 2413 ACPI_OBJECT *res, *res2; 2414 int error, i, power_count; 2415 2416 if (h == NULL || prw == NULL) 2417 return (EINVAL); 2418 2419 /* 2420 * The _PRW object (7.2.9) is only required for devices that have the 2421 * ability to wake the system from a sleeping state. 2422 */ 2423 error = EINVAL; 2424 prw_buffer.Pointer = NULL; 2425 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2426 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2427 if (ACPI_FAILURE(status)) 2428 return (ENOENT); 2429 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2430 if (res == NULL) 2431 return (ENOENT); 2432 if (!ACPI_PKG_VALID(res, 2)) 2433 goto out; 2434 2435 /* 2436 * Element 1 of the _PRW object: 2437 * The lowest power system sleeping state that can be entered while still 2438 * providing wake functionality. The sleeping state being entered must 2439 * be less than (i.e., higher power) or equal to this value. 2440 */ 2441 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2442 goto out; 2443 2444 /* 2445 * Element 0 of the _PRW object: 2446 */ 2447 switch (res->Package.Elements[0].Type) { 2448 case ACPI_TYPE_INTEGER: 2449 /* 2450 * If the data type of this package element is numeric, then this 2451 * _PRW package element is the bit index in the GPEx_EN, in the 2452 * GPE blocks described in the FADT, of the enable bit that is 2453 * enabled for the wake event. 2454 */ 2455 prw->gpe_handle = NULL; 2456 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2457 error = 0; 2458 break; 2459 case ACPI_TYPE_PACKAGE: 2460 /* 2461 * If the data type of this package element is a package, then this 2462 * _PRW package element is itself a package containing two 2463 * elements. The first is an object reference to the GPE Block 2464 * device that contains the GPE that will be triggered by the wake 2465 * event. The second element is numeric and it contains the bit 2466 * index in the GPEx_EN, in the GPE Block referenced by the 2467 * first element in the package, of the enable bit that is enabled for 2468 * the wake event. 2469 * 2470 * For example, if this field is a package then it is of the form: 2471 * Package() {\_SB.PCI0.ISA.GPE, 2} 2472 */ 2473 res2 = &res->Package.Elements[0]; 2474 if (!ACPI_PKG_VALID(res2, 2)) 2475 goto out; 2476 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2477 if (prw->gpe_handle == NULL) 2478 goto out; 2479 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2480 goto out; 2481 error = 0; 2482 break; 2483 default: 2484 goto out; 2485 } 2486 2487 /* Elements 2 to N of the _PRW object are power resources. */ 2488 power_count = res->Package.Count - 2; 2489 if (power_count > ACPI_PRW_MAX_POWERRES) { 2490 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2491 power_count = 0; 2492 } 2493 prw->power_res_count = power_count; 2494 for (i = 0; i < power_count; i++) 2495 prw->power_res[i] = res->Package.Elements[i]; 2496 2497 out: 2498 if (prw_buffer.Pointer != NULL) 2499 AcpiOsFree(prw_buffer.Pointer); 2500 return (error); 2501 } 2502 2503 /* 2504 * ACPI Event Handlers 2505 */ 2506 2507 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2508 2509 static void 2510 acpi_system_eventhandler_sleep(void *arg, int state) 2511 { 2512 2513 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2514 2515 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2516 acpi_SetSleepState((struct acpi_softc *)arg, state); 2517 2518 return_VOID; 2519 } 2520 2521 static void 2522 acpi_system_eventhandler_wakeup(void *arg, int state) 2523 { 2524 2525 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2526 2527 /* Currently, nothing to do for wakeup. */ 2528 2529 return_VOID; 2530 } 2531 2532 /* 2533 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2534 */ 2535 UINT32 2536 acpi_event_power_button_sleep(void *context) 2537 { 2538 struct acpi_softc *sc = (struct acpi_softc *)context; 2539 2540 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2541 2542 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2543 2544 return_VALUE (ACPI_INTERRUPT_HANDLED); 2545 } 2546 2547 UINT32 2548 acpi_event_power_button_wake(void *context) 2549 { 2550 struct acpi_softc *sc = (struct acpi_softc *)context; 2551 2552 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2553 2554 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2555 2556 return_VALUE (ACPI_INTERRUPT_HANDLED); 2557 } 2558 2559 UINT32 2560 acpi_event_sleep_button_sleep(void *context) 2561 { 2562 struct acpi_softc *sc = (struct acpi_softc *)context; 2563 2564 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2565 2566 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2567 2568 return_VALUE (ACPI_INTERRUPT_HANDLED); 2569 } 2570 2571 UINT32 2572 acpi_event_sleep_button_wake(void *context) 2573 { 2574 struct acpi_softc *sc = (struct acpi_softc *)context; 2575 2576 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2577 2578 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2579 2580 return_VALUE (ACPI_INTERRUPT_HANDLED); 2581 } 2582 2583 /* 2584 * XXX This static buffer is suboptimal. There is no locking so only 2585 * use this for single-threaded callers. 2586 */ 2587 char * 2588 acpi_name(ACPI_HANDLE handle) 2589 { 2590 ACPI_BUFFER buf; 2591 static char data[256]; 2592 2593 buf.Length = sizeof(data); 2594 buf.Pointer = data; 2595 2596 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2597 return (data); 2598 return ("(unknown)"); 2599 } 2600 2601 /* 2602 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2603 * parts of the namespace. 2604 */ 2605 int 2606 acpi_avoid(ACPI_HANDLE handle) 2607 { 2608 char *cp, *env, *np; 2609 int len; 2610 2611 np = acpi_name(handle); 2612 if (*np == '\\') 2613 np++; 2614 if ((env = getenv("debug.acpi.avoid")) == NULL) 2615 return (0); 2616 2617 /* Scan the avoid list checking for a match */ 2618 cp = env; 2619 for (;;) { 2620 while (*cp != 0 && isspace(*cp)) 2621 cp++; 2622 if (*cp == 0) 2623 break; 2624 len = 0; 2625 while (cp[len] != 0 && !isspace(cp[len])) 2626 len++; 2627 if (!strncmp(cp, np, len)) { 2628 freeenv(env); 2629 return(1); 2630 } 2631 cp += len; 2632 } 2633 freeenv(env); 2634 2635 return (0); 2636 } 2637 2638 /* 2639 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2640 */ 2641 int 2642 acpi_disabled(char *subsys) 2643 { 2644 char *cp, *env; 2645 int len; 2646 2647 if ((env = getenv("debug.acpi.disabled")) == NULL) 2648 return (0); 2649 if (strcmp(env, "all") == 0) { 2650 freeenv(env); 2651 return (1); 2652 } 2653 2654 /* Scan the disable list, checking for a match. */ 2655 cp = env; 2656 for (;;) { 2657 while (*cp != '\0' && isspace(*cp)) 2658 cp++; 2659 if (*cp == '\0') 2660 break; 2661 len = 0; 2662 while (cp[len] != '\0' && !isspace(cp[len])) 2663 len++; 2664 if (strncmp(cp, subsys, len) == 0) { 2665 freeenv(env); 2666 return (1); 2667 } 2668 cp += len; 2669 } 2670 freeenv(env); 2671 2672 return (0); 2673 } 2674 2675 /* 2676 * Control interface. 2677 * 2678 * We multiplex ioctls for all participating ACPI devices here. Individual 2679 * drivers wanting to be accessible via /dev/acpi should use the 2680 * register/deregister interface to make their handlers visible. 2681 */ 2682 struct acpi_ioctl_hook 2683 { 2684 TAILQ_ENTRY(acpi_ioctl_hook) link; 2685 u_long cmd; 2686 acpi_ioctl_fn fn; 2687 void *arg; 2688 }; 2689 2690 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2691 static int acpi_ioctl_hooks_initted; 2692 2693 int 2694 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2695 { 2696 struct acpi_ioctl_hook *hp; 2697 2698 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2699 return (ENOMEM); 2700 hp->cmd = cmd; 2701 hp->fn = fn; 2702 hp->arg = arg; 2703 2704 ACPI_LOCK(acpi); 2705 if (acpi_ioctl_hooks_initted == 0) { 2706 TAILQ_INIT(&acpi_ioctl_hooks); 2707 acpi_ioctl_hooks_initted = 1; 2708 } 2709 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2710 ACPI_UNLOCK(acpi); 2711 2712 return (0); 2713 } 2714 2715 void 2716 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2717 { 2718 struct acpi_ioctl_hook *hp; 2719 2720 ACPI_LOCK(acpi); 2721 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2722 if (hp->cmd == cmd && hp->fn == fn) 2723 break; 2724 2725 if (hp != NULL) { 2726 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2727 free(hp, M_ACPIDEV); 2728 } 2729 ACPI_UNLOCK(acpi); 2730 } 2731 2732 static int 2733 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2734 { 2735 return (0); 2736 } 2737 2738 static int 2739 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2740 { 2741 return (0); 2742 } 2743 2744 static int 2745 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2746 { 2747 struct acpi_softc *sc; 2748 struct acpi_ioctl_hook *hp; 2749 int error, state; 2750 2751 error = 0; 2752 hp = NULL; 2753 sc = dev->si_drv1; 2754 2755 /* 2756 * Scan the list of registered ioctls, looking for handlers. 2757 */ 2758 ACPI_LOCK(acpi); 2759 if (acpi_ioctl_hooks_initted) 2760 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2761 if (hp->cmd == cmd) 2762 break; 2763 } 2764 ACPI_UNLOCK(acpi); 2765 if (hp) 2766 return (hp->fn(cmd, addr, hp->arg)); 2767 2768 /* 2769 * Core ioctls are not permitted for non-writable user. 2770 * Currently, other ioctls just fetch information. 2771 * Not changing system behavior. 2772 */ 2773 if ((flag & FWRITE) == 0) 2774 return (EPERM); 2775 2776 /* Core system ioctls. */ 2777 switch (cmd) { 2778 case ACPIIO_SETSLPSTATE: 2779 error = EINVAL; 2780 state = *(int *)addr; 2781 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2782 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 2783 error = 0; 2784 break; 2785 default: 2786 error = ENXIO; 2787 break; 2788 } 2789 2790 return (error); 2791 } 2792 2793 static int 2794 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2795 { 2796 int error; 2797 struct sbuf sb; 2798 UINT8 state, TypeA, TypeB; 2799 2800 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 2801 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 2802 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 2803 sbuf_printf(&sb, "S%d ", state); 2804 sbuf_trim(&sb); 2805 sbuf_finish(&sb); 2806 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2807 sbuf_delete(&sb); 2808 return (error); 2809 } 2810 2811 static int 2812 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2813 { 2814 char sleep_state[10]; 2815 int error; 2816 u_int new_state, old_state; 2817 2818 old_state = *(u_int *)oidp->oid_arg1; 2819 if (old_state > ACPI_S_STATES_MAX + 1) 2820 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 2821 else 2822 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 2823 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2824 if (error == 0 && req->newptr != NULL) { 2825 new_state = ACPI_STATE_S0; 2826 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 2827 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 2828 break; 2829 if (new_state <= ACPI_S_STATES_MAX + 1) { 2830 if (new_state != old_state) 2831 *(u_int *)oidp->oid_arg1 = new_state; 2832 } else 2833 error = EINVAL; 2834 } 2835 2836 return (error); 2837 } 2838 2839 /* Inform devctl(4) when we receive a Notify. */ 2840 void 2841 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2842 { 2843 char notify_buf[16]; 2844 ACPI_BUFFER handle_buf; 2845 ACPI_STATUS status; 2846 2847 if (subsystem == NULL) 2848 return; 2849 2850 handle_buf.Pointer = NULL; 2851 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2852 status = AcpiNsHandleToPathname(h, &handle_buf); 2853 if (ACPI_FAILURE(status)) 2854 return; 2855 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2856 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2857 AcpiOsFree(handle_buf.Pointer); 2858 } 2859 2860 #ifdef ACPI_DEBUG 2861 /* 2862 * Support for parsing debug options from the kernel environment. 2863 * 2864 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2865 * by specifying the names of the bits in the debug.acpi.layer and 2866 * debug.acpi.level environment variables. Bits may be unset by 2867 * prefixing the bit name with !. 2868 */ 2869 struct debugtag 2870 { 2871 char *name; 2872 UINT32 value; 2873 }; 2874 2875 static struct debugtag dbg_layer[] = { 2876 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2877 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2878 {"ACPI_EVENTS", ACPI_EVENTS}, 2879 {"ACPI_TABLES", ACPI_TABLES}, 2880 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2881 {"ACPI_PARSER", ACPI_PARSER}, 2882 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2883 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2884 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2885 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2886 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2887 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2888 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2889 2890 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2891 {"ACPI_BATTERY", ACPI_BATTERY}, 2892 {"ACPI_BUS", ACPI_BUS}, 2893 {"ACPI_BUTTON", ACPI_BUTTON}, 2894 {"ACPI_EC", ACPI_EC}, 2895 {"ACPI_FAN", ACPI_FAN}, 2896 {"ACPI_POWERRES", ACPI_POWERRES}, 2897 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2898 {"ACPI_THERMAL", ACPI_THERMAL}, 2899 {"ACPI_TIMER", ACPI_TIMER}, 2900 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2901 {NULL, 0} 2902 }; 2903 2904 static struct debugtag dbg_level[] = { 2905 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2906 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2907 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2908 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2909 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2910 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2911 2912 /* Trace verbosity level 1 [Standard Trace Level] */ 2913 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2914 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2915 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2916 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2917 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2918 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2919 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2920 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2921 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2922 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2923 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2924 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2925 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2926 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2927 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2928 2929 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2930 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2931 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2932 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2933 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2934 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2935 2936 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2937 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2938 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2939 {"ACPI_LV_IO", ACPI_LV_IO}, 2940 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2941 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2942 2943 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2944 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2945 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2946 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2947 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2948 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2949 {NULL, 0} 2950 }; 2951 2952 static void 2953 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2954 { 2955 char *ep; 2956 int i, l; 2957 int set; 2958 2959 while (*cp) { 2960 if (isspace(*cp)) { 2961 cp++; 2962 continue; 2963 } 2964 ep = cp; 2965 while (*ep && !isspace(*ep)) 2966 ep++; 2967 if (*cp == '!') { 2968 set = 0; 2969 cp++; 2970 if (cp == ep) 2971 continue; 2972 } else { 2973 set = 1; 2974 } 2975 l = ep - cp; 2976 for (i = 0; tag[i].name != NULL; i++) { 2977 if (!strncmp(cp, tag[i].name, l)) { 2978 if (set) 2979 *flag |= tag[i].value; 2980 else 2981 *flag &= ~tag[i].value; 2982 } 2983 } 2984 cp = ep; 2985 } 2986 } 2987 2988 static void 2989 acpi_set_debugging(void *junk) 2990 { 2991 char *layer, *level; 2992 2993 if (cold) { 2994 AcpiDbgLayer = 0; 2995 AcpiDbgLevel = 0; 2996 } 2997 2998 layer = getenv("debug.acpi.layer"); 2999 level = getenv("debug.acpi.level"); 3000 if (layer == NULL && level == NULL) 3001 return; 3002 3003 printf("ACPI set debug"); 3004 if (layer != NULL) { 3005 if (strcmp("NONE", layer) != 0) 3006 printf(" layer '%s'", layer); 3007 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3008 freeenv(layer); 3009 } 3010 if (level != NULL) { 3011 if (strcmp("NONE", level) != 0) 3012 printf(" level '%s'", level); 3013 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3014 freeenv(level); 3015 } 3016 printf("\n"); 3017 } 3018 3019 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3020 NULL); 3021 3022 static int 3023 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3024 { 3025 int error, *dbg; 3026 struct debugtag *tag; 3027 struct sbuf sb; 3028 3029 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3030 return (ENOMEM); 3031 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3032 tag = &dbg_layer[0]; 3033 dbg = &AcpiDbgLayer; 3034 } else { 3035 tag = &dbg_level[0]; 3036 dbg = &AcpiDbgLevel; 3037 } 3038 3039 /* Get old values if this is a get request. */ 3040 ACPI_SERIAL_BEGIN(acpi); 3041 if (*dbg == 0) { 3042 sbuf_cpy(&sb, "NONE"); 3043 } else if (req->newptr == NULL) { 3044 for (; tag->name != NULL; tag++) { 3045 if ((*dbg & tag->value) == tag->value) 3046 sbuf_printf(&sb, "%s ", tag->name); 3047 } 3048 } 3049 sbuf_trim(&sb); 3050 sbuf_finish(&sb); 3051 3052 /* Copy out the old values to the user. */ 3053 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3054 sbuf_delete(&sb); 3055 3056 /* If the user is setting a string, parse it. */ 3057 if (error == 0 && req->newptr != NULL) { 3058 *dbg = 0; 3059 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3060 acpi_set_debugging(NULL); 3061 } 3062 ACPI_SERIAL_END(acpi); 3063 3064 return (error); 3065 } 3066 3067 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3068 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3069 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3070 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3071 #endif /* ACPI_DEBUG */ 3072 3073 static int 3074 acpi_pm_func(u_long cmd, void *arg, ...) 3075 { 3076 int state, acpi_state; 3077 int error; 3078 struct acpi_softc *sc; 3079 va_list ap; 3080 3081 error = 0; 3082 switch (cmd) { 3083 case POWER_CMD_SUSPEND: 3084 sc = (struct acpi_softc *)arg; 3085 if (sc == NULL) { 3086 error = EINVAL; 3087 goto out; 3088 } 3089 3090 va_start(ap, arg); 3091 state = va_arg(ap, int); 3092 va_end(ap); 3093 3094 switch (state) { 3095 case POWER_SLEEP_STATE_STANDBY: 3096 acpi_state = sc->acpi_standby_sx; 3097 break; 3098 case POWER_SLEEP_STATE_SUSPEND: 3099 acpi_state = sc->acpi_suspend_sx; 3100 break; 3101 case POWER_SLEEP_STATE_HIBERNATE: 3102 acpi_state = ACPI_STATE_S4; 3103 break; 3104 default: 3105 error = EINVAL; 3106 goto out; 3107 } 3108 3109 acpi_SetSleepState(sc, acpi_state); 3110 break; 3111 default: 3112 error = EINVAL; 3113 goto out; 3114 } 3115 3116 out: 3117 return (error); 3118 } 3119 3120 static void 3121 acpi_pm_register(void *arg) 3122 { 3123 if (!cold || resource_disabled("acpi", 0)) 3124 return; 3125 3126 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3127 } 3128 3129 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3130