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
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
33 #include <sys/param.h>
34 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/mutex.h>
41 #include <sys/ioccom.h>
42 #include <sys/reboot.h>
43 #include <sys/sysctl.h>
44 #include <sys/ctype.h>
45 #include <sys/linker.h>
46 #include <sys/power.h>
48 #include <machine/clock.h>
49 #include <machine/resource.h>
51 #include <isa/isavar.h>
55 #include <dev/acpica/acpica_support.h>
57 #include <dev/acpica/acpivar.h>
58 #include <dev/acpica/acpiio.h>
60 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
63 * Hooks for the ACPI CA debugging infrastructure
65 #define _COMPONENT ACPI_BUS
66 ACPI_MODULE_NAME("ACPI")
72 static d_open_t acpiopen;
73 static d_close_t acpiclose;
74 static d_ioctl_t acpiioctl;
76 #define CDEV_MAJOR 152
77 static struct cdevsw acpi_cdevsw = {
93 static const char* sleep_state_names[] = {
94 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
96 /* this has to be static, as the softc is gone when we need it */
97 static int acpi_off_state = ACPI_STATE_S5;
99 struct mtx acpi_mutex;
101 static int acpi_modevent(struct module *mod, int event, void *junk);
102 static void acpi_identify(driver_t *driver, device_t parent);
103 static int acpi_probe(device_t dev);
104 static int acpi_attach(device_t dev);
105 static device_t acpi_add_child(device_t bus, int order, const char *name, int unit);
106 static int acpi_print_resources(struct resource_list *rl, const char *name, int type,
108 static int acpi_print_child(device_t bus, device_t child);
109 static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result);
110 static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value);
111 static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start,
113 static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp,
115 static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
116 u_long start, u_long end, u_long count, u_int flags);
117 static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r);
118 static u_int32_t acpi_isa_get_logicalid(device_t dev);
119 static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids);
121 static void acpi_probe_children(device_t bus);
122 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status);
124 static void acpi_shutdown_pre_sync(void *arg, int howto);
125 static void acpi_shutdown_final(void *arg, int howto);
127 static void acpi_enable_fixed_events(struct acpi_softc *sc);
129 static void acpi_system_eventhandler_sleep(void *arg, int state);
130 static void acpi_system_eventhandler_wakeup(void *arg, int state);
131 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
133 static int acpi_pm_func(u_long cmd, void *arg, ...);
135 static device_method_t acpi_methods[] = {
136 /* Device interface */
137 DEVMETHOD(device_identify, acpi_identify),
138 DEVMETHOD(device_probe, acpi_probe),
139 DEVMETHOD(device_attach, acpi_attach),
140 DEVMETHOD(device_shutdown, bus_generic_shutdown),
141 DEVMETHOD(device_suspend, bus_generic_suspend),
142 DEVMETHOD(device_resume, bus_generic_resume),
145 DEVMETHOD(bus_add_child, acpi_add_child),
146 DEVMETHOD(bus_print_child, acpi_print_child),
147 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
148 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
149 DEVMETHOD(bus_set_resource, acpi_set_resource),
150 DEVMETHOD(bus_get_resource, acpi_get_resource),
151 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
152 DEVMETHOD(bus_release_resource, acpi_release_resource),
153 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
154 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
155 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
156 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
157 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
160 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
165 static driver_t acpi_driver = {
168 sizeof(struct acpi_softc),
171 static devclass_t acpi_devclass;
172 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
173 MODULE_VERSION(acpi, 100);
175 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, "");
176 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, "");
177 static int acpi_ca_version = ACPI_CA_VERSION;
178 SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, "");
181 * ACPI can only be loaded as a module by the loader; activating it after
182 * system bootstrap time is not useful, and can be fatal to the system.
183 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it.
186 acpi_modevent(struct module *mod, int event, void *junk)
194 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
204 * Detect ACPI, perform early initialisation
207 acpi_identify(driver_t *driver, device_t parent)
215 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
218 printf("Don't load this driver from userland!!\n");
223 * Check that we haven't been disabled with a hint.
225 if (!resource_int_value("acpi", 0, "disabled", &error) &&
230 * Make sure we're not being doubly invoked.
232 if (device_find_child(parent, "acpi", 0) != NULL)
235 /* initialise the ACPI mutex */
236 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
239 * Start up the ACPI CA subsystem.
242 debugpoint = getenv("debug.acpi.debugger");
244 if (!strcmp(debugpoint, "init"))
245 acpi_EnterDebugger();
249 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) {
250 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error));
254 debugpoint = getenv("debug.acpi.debugger");
256 if (!strcmp(debugpoint, "tables"))
257 acpi_EnterDebugger();
262 if (ACPI_FAILURE(error = AcpiLoadTables())) {
263 printf("ACPI: table load failed: %s\n", AcpiFormatException(error));
268 * Attach the actual ACPI device.
270 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) {
271 device_printf(parent, "ACPI: could not attach\n");
277 * Fetch some descriptive data from ACPI to put in our attach message
280 acpi_probe(device_t dev)
282 ACPI_TABLE_HEADER th;
287 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
289 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
290 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
291 device_printf(dev, "Other PM system enabled.\n");
297 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) {
298 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status));
301 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId);
302 device_set_desc_copy(dev, buf);
310 acpi_attach(device_t dev)
312 struct acpi_softc *sc;
321 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
323 sc = device_get_softc(dev);
324 bzero(sc, sizeof(*sc));
328 debugpoint = getenv("debug.acpi.debugger");
330 if (!strcmp(debugpoint, "spaces"))
331 acpi_EnterDebugger();
337 * Install the default address space handlers.
340 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
341 ACPI_ADR_SPACE_SYSTEM_MEMORY,
342 ACPI_DEFAULT_HANDLER,
344 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status));
347 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
348 ACPI_ADR_SPACE_SYSTEM_IO,
349 ACPI_DEFAULT_HANDLER,
351 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status));
354 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
355 ACPI_ADR_SPACE_PCI_CONFIG,
356 ACPI_DEFAULT_HANDLER,
358 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status));
363 * Bring ACPI fully online.
365 * Note that some systems (specifically, those with namespace evaluation issues
366 * that require the avoidance of parts of the namespace) must avoid running _INI
367 * and _STA on everything, as well as dodging the final object init pass.
369 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
371 * XXX We should arrange for the object init pass after we have attached all our
372 * child devices, but on many systems it works here.
375 debugpoint = getenv("debug.acpi.debugger");
377 if (!strcmp(debugpoint, "enable"))
378 acpi_EnterDebugger();
383 if (testenv("debug.acpi.avoid"))
384 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
385 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
386 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status));
390 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
391 device_printf(dev, "could not initialize ACPI objects: %s\n", AcpiFormatException(status));
396 * Setup our sysctl tree.
398 * XXX: This doesn't check to make sure that none of these fail.
400 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
401 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
402 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
403 device_get_name(dev), CTLFLAG_RD, 0, "");
404 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
405 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
406 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
407 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
408 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
409 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
410 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
411 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
412 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
413 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
414 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
415 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
416 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
417 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
418 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
419 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
420 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW,
421 &sc->acpi_sleep_delay, 0, "sleep delay");
422 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
423 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW,
424 &sc->acpi_s4bios, 0, "S4BIOS mode");
425 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
426 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW,
427 &sc->acpi_verbose, 0, "verbose mode");
428 sc->acpi_sleep_delay = 0;
431 sc->acpi_verbose = 1;
434 * Dispatch the default sleep state to devices.
435 * TBD: should be configured from userland policy manager.
437 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX;
438 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX;
439 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX;
440 sc->acpi_standby_sx = ACPI_STATE_S1;
441 sc->acpi_suspend_sx = ACPI_STATE_S3;
443 acpi_enable_fixed_events(sc);
446 * Scan the namespace and attach/initialise children.
449 debugpoint = getenv("debug.acpi.debugger");
451 if (!strcmp(debugpoint, "probe"))
452 acpi_EnterDebugger();
456 if (!acpi_disabled("bus"))
457 acpi_probe_children(dev);
460 * Register our shutdown handlers
462 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST);
463 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST);
466 * Register our acpi event handlers.
467 * XXX should be configurable eg. via userland policy manager.
469 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST);
470 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST);
473 * Flag our initial states.
475 sc->acpi_enabled = 1;
476 sc->acpi_sstate = ACPI_STATE_S0;
477 sc->acpi_sleep_disabled = 0;
480 * Create the control device
482 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi");
483 sc->acpi_dev_t->si_drv1 = sc;
486 debugpoint = getenv("debug.acpi.debugger");
488 if (!strcmp(debugpoint, "running"))
489 acpi_EnterDebugger();
494 #if defined(ACPI_MAX_THREADS) && ACPI_MAX_THREADS > 0
495 if ((error = acpi_task_thread_init())) {
500 if ((error = acpi_machdep_init(dev))) {
504 /* Register ACPI again to pass the correct argument of pm_func. */
505 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
515 * Handle a new device being added
518 acpi_add_child(device_t bus, int order, const char *name, int unit)
520 struct acpi_device *ad;
523 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL)
525 bzero(ad, sizeof(*ad));
527 resource_list_init(&ad->ad_rl);
529 child = device_add_child_ordered(bus, order, name, unit);
531 device_set_ivars(child, ad);
536 * Print child device resource usage
539 acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format)
541 struct resource_list_entry *rle;
547 if (!SLIST_FIRST(rl))
550 /* Yes, this is kinda cheating */
551 SLIST_FOREACH(rle, rl, link) {
552 if (rle->type == type) {
554 retval += printf(" %s ", name);
555 else if (printed > 0)
556 retval += printf(",");
558 retval += printf(format, rle->start);
559 if (rle->count > 1) {
560 retval += printf("-");
561 retval += printf(format, rle->start +
570 acpi_print_child(device_t bus, device_t child)
572 struct acpi_device *adev = device_get_ivars(child);
573 struct resource_list *rl = &adev->ad_rl;
576 retval += bus_print_child_header(bus, child);
577 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx");
578 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx");
579 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld");
580 retval += acpi_print_resources(rl, "drq", SYS_RES_DRQ, "%ld");
581 retval += bus_print_child_footer(bus, child);
588 * Handle per-device ivars
591 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
593 struct acpi_device *ad;
595 if ((ad = device_get_ivars(child)) == NULL) {
596 printf("device has no ivars\n");
602 case ACPI_IVAR_HANDLE:
603 *(ACPI_HANDLE *)result = ad->ad_handle;
605 case ACPI_IVAR_MAGIC:
606 *(int *)result = ad->ad_magic;
608 case ACPI_IVAR_PRIVATE:
609 *(void **)result = ad->ad_private;
612 /* ISA compatibility */
613 case ISA_IVAR_VENDORID:
614 case ISA_IVAR_SERIAL:
615 case ISA_IVAR_COMPATID:
619 case ISA_IVAR_LOGICALID:
620 *(int *)result = acpi_isa_get_logicalid(child);
624 panic("bad ivar read request (%d)", index);
631 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
633 struct acpi_device *ad;
635 if ((ad = device_get_ivars(child)) == NULL) {
636 printf("device has no ivars\n");
642 case ACPI_IVAR_HANDLE:
643 ad->ad_handle = (ACPI_HANDLE)value;
645 case ACPI_IVAR_MAGIC:
646 ad->ad_magic = (int )value;
648 case ACPI_IVAR_PRIVATE:
649 ad->ad_private = (void *)value;
653 panic("bad ivar write request (%d)", index);
660 * Handle child resource allocation/removal
663 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count)
665 struct acpi_device *ad = device_get_ivars(child);
666 struct resource_list *rl = &ad->ad_rl;
668 resource_list_add(rl, type, rid, start, start + count -1, count);
674 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
676 struct acpi_device *ad = device_get_ivars(child);
677 struct resource_list *rl = &ad->ad_rl;
678 struct resource_list_entry *rle;
680 rle = resource_list_find(rl, type, rid);
685 *startp = rle->start;
687 *countp = rle->count;
692 static struct resource *
693 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
694 u_long start, u_long end, u_long count, u_int flags)
696 struct acpi_device *ad = device_get_ivars(child);
697 struct resource_list *rl = &ad->ad_rl;
699 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags));
703 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r)
705 struct acpi_device *ad = device_get_ivars(child);
706 struct resource_list *rl = &ad->ad_rl;
708 return(resource_list_release(rl, bus, child, type, rid, r));
712 * Handle ISA-like devices probing for a PnP ID to match.
714 #define PNP_EISAID(s) \
715 ((((s[0] - '@') & 0x1f) << 2) \
716 | (((s[1] - '@') & 0x18) >> 3) \
717 | (((s[1] - '@') & 0x07) << 13) \
718 | (((s[2] - '@') & 0x1f) << 8) \
719 | (PNP_HEXTONUM(s[4]) << 16) \
720 | (PNP_HEXTONUM(s[3]) << 20) \
721 | (PNP_HEXTONUM(s[6]) << 24) \
722 | (PNP_HEXTONUM(s[5]) << 28))
725 acpi_isa_get_logicalid(device_t dev)
728 ACPI_DEVICE_INFO devinfo;
732 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
737 /* fetch and validate the HID */
738 if ((h = acpi_get_handle(dev)) == NULL)
740 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
742 if (!(devinfo.Valid & ACPI_VALID_HID))
745 pnpid = PNP_EISAID(devinfo.HardwareId);
752 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
757 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
760 * ISA-style drivers attached to ACPI may persist and
761 * probe manually if we return ENOENT. We never want
762 * that to happen, so don't ever return it.
766 /* scan the supplied IDs for a match */
767 pnpid = acpi_isa_get_logicalid(child);
768 while (ids && ids->ip_id) {
769 if (pnpid == ids->ip_id) {
776 return_VALUE(result);
780 * Scan relevant portions of the ACPI namespace and attach child devices.
782 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes,
783 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec.
786 acpi_probe_children(device_t bus)
789 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL};
792 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
796 * Create any static children by calling device identify methods.
798 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
799 bus_generic_probe(bus);
802 * Scan the namespace and insert placeholders for all the devices that
805 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
806 * we want to create nodes for all devices, not just those that are currently
807 * present. (This assumes that we don't want to create/remove devices as they
808 * appear, which might be smarter.)
810 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
811 for (i = 0; scopes[i] != NULL; i++)
812 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)))
813 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL);
816 * Scan all of the child devices we have created and let them probe/attach.
818 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
819 bus_generic_attach(bus);
822 * Some of these children may have attached others as part of their attach
823 * process (eg. the root PCI bus driver), so rescan.
825 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
826 bus_generic_attach(bus);
828 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
833 * Evaluate a child device and determine whether we might attach a device to
837 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
839 ACPI_OBJECT_TYPE type;
840 device_t child, bus = (device_t)context;
842 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
845 * Skip this device if we think we'll have trouble with it.
847 if (acpi_avoid(handle))
848 return_ACPI_STATUS(AE_OK);
850 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
852 case ACPI_TYPE_DEVICE:
853 case ACPI_TYPE_PROCESSOR:
854 case ACPI_TYPE_THERMAL:
855 case ACPI_TYPE_POWER:
856 if (acpi_disabled("children"))
859 * Create a placeholder device for this node. Sort the placeholder
860 * so that the probe/attach passes will run breadth-first.
862 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle)));
863 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1);
866 acpi_set_handle(child, handle);
869 * Check that the device is present. If it's not present,
870 * leave it disabled (so that we have a device_t attached to
871 * the handle, but we don't probe it).
873 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) {
874 device_disable(child);
879 * Get the device's resource settings and attach them.
880 * Note that if the device has _PRS but no _CRS, we need
881 * to decide when it's appropriate to try to configure the
882 * device. Ignore the return value here; it's OK for the
883 * device not to have any resources.
885 acpi_parse_resources(child, handle, &acpi_res_parse_set);
887 /* if we're debugging, probe/attach now rather than later */
888 ACPI_DEBUG_EXEC(device_probe_and_attach(child));
892 return_ACPI_STATUS(AE_OK);
896 acpi_shutdown_pre_sync(void *arg, int howto)
902 * Disable all ACPI events before soft off, otherwise the system
903 * will be turned on again on some laptops.
905 * XXX this should probably be restricted to masking some events just
906 * before powering down, since we may still need ACPI during the
909 acpi_Disable((struct acpi_softc *)arg);
913 acpi_shutdown_final(void *arg, int howto)
919 if (howto & RB_POWEROFF) {
920 printf("Power system off using ACPI...\n");
921 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(acpi_off_state))) {
922 printf("AcpiEnterSleepStatePrep failed - %s\n",
923 AcpiFormatException(status));
926 if (ACPI_FAILURE(status = AcpiEnterSleepState(acpi_off_state))) {
927 printf("ACPI power-off failed - %s\n", AcpiFormatException(status));
930 printf("ACPI power-off failed - timeout\n");
933 printf("Terminate ACPI\n");
939 acpi_enable_fixed_events(struct acpi_softc *sc)
941 static int first_time = 1;
942 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n"
946 /* Enable and clear fixed events and install handlers. */
947 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) {
948 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED, 0);
949 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED);
950 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
951 acpi_eventhandler_power_button_for_sleep, sc);
953 device_printf(sc->acpi_dev, MSGFORMAT, "power");
956 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) {
957 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED, 0);
958 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED);
959 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
960 acpi_eventhandler_sleep_button_for_sleep, sc);
962 device_printf(sc->acpi_dev, MSGFORMAT, "sleep");
970 * Returns true if the device is actually present and should
971 * be attached to. This requires the present, enabled, UI-visible
972 * and diagnostics-passed bits to be set.
975 acpi_DeviceIsPresent(device_t dev)
978 ACPI_DEVICE_INFO devinfo;
983 if ((h = acpi_get_handle(dev)) == NULL)
985 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
987 /* if no _STA method, must be present */
988 if (!(devinfo.Valid & ACPI_VALID_STA))
990 /* return true for 'present' and 'functioning' */
991 if ((devinfo.CurrentStatus & 0x9) == 0x9)
997 * Returns true if the battery is actually present and inserted.
1000 acpi_BatteryIsPresent(device_t dev)
1003 ACPI_DEVICE_INFO devinfo;
1008 if ((h = acpi_get_handle(dev)) == NULL)
1010 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1012 /* if no _STA method, must be present */
1013 if (!(devinfo.Valid & ACPI_VALID_STA))
1015 /* return true for 'present' and 'functioning' */
1016 if ((devinfo.CurrentStatus & 0x19) == 0x19)
1022 * Match a HID string against a device
1025 acpi_MatchHid(device_t dev, char *hid)
1028 ACPI_DEVICE_INFO devinfo;
1036 if ((h = acpi_get_handle(dev)) == NULL)
1038 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1040 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId))
1042 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid)))
1044 if (cid == PNP_EISAID(hid))
1050 * Return the handle of a named object within our scope, ie. that of (parent)
1051 * or one if its parents.
1054 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1061 /* walk back up the tree to the root */
1063 if (ACPI_SUCCESS(status = AcpiGetHandle(parent, path, &r))) {
1067 if (status != AE_NOT_FOUND)
1069 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1070 return(AE_NOT_FOUND);
1076 * Allocate a buffer with a preset data size.
1079 acpi_AllocBuffer(int size)
1083 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
1086 buf->Pointer = (void *)(buf + 1);
1091 * Evaluate a path that should return an integer.
1094 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number)
1103 handle = ACPI_ROOT_OBJECT;
1106 * Assume that what we've been pointed at is an Integer object, or
1107 * a method that will return an Integer.
1109 buf.Pointer = ¶m;
1110 buf.Length = sizeof(param);
1111 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) {
1112 if (param.Type == ACPI_TYPE_INTEGER) {
1113 *number = param.Integer.Value;
1120 * In some applications, a method that's expected to return an Integer
1121 * may instead return a Buffer (probably to simplify some internal
1122 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1123 * convert it into an Integer as best we can.
1127 if (error == AE_BUFFER_OVERFLOW) {
1128 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1129 error = AE_NO_MEMORY;
1131 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) {
1132 error = acpi_ConvertBufferToInteger(&buf, number);
1135 AcpiOsFree(buf.Pointer);
1141 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number)
1146 p = (ACPI_OBJECT *)bufp->Pointer;
1147 if (p->Type == ACPI_TYPE_INTEGER) {
1148 *number = p->Integer.Value;
1151 if (p->Type != ACPI_TYPE_BUFFER)
1153 if (p->Buffer.Length > sizeof(int))
1154 return(AE_BAD_DATA);
1156 for (i = 0; i < p->Buffer.Length; i++)
1157 *number += (*(p->Buffer.Pointer + i) << (i * 8));
1162 * Iterate over the elements of an a package object, calling the supplied
1163 * function for each element.
1165 * XXX possible enhancement might be to abort traversal on error.
1168 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg)
1173 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE))
1174 return(AE_BAD_PARAMETER);
1176 /* iterate over components */
1177 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++)
1184 * Find the (index)th resource object in a set.
1187 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
1192 rp = (ACPI_RESOURCE *)buf->Pointer;
1196 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1197 return(AE_BAD_PARAMETER);
1198 /* check for terminator */
1199 if ((rp->Id == ACPI_RSTYPE_END_TAG) ||
1201 return(AE_NOT_FOUND);
1202 rp = ACPI_RESOURCE_NEXT(rp);
1210 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
1212 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
1213 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
1214 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
1217 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
1220 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
1226 * Initialise the buffer if necessary.
1228 if (buf->Pointer == NULL) {
1229 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
1230 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
1231 return(AE_NO_MEMORY);
1232 rp = (ACPI_RESOURCE *)buf->Pointer;
1233 rp->Id = ACPI_RSTYPE_END_TAG;
1240 * Scan the current buffer looking for the terminator.
1241 * This will either find the terminator or hit the end
1242 * of the buffer and return an error.
1244 rp = (ACPI_RESOURCE *)buf->Pointer;
1246 /* range check, don't go outside the buffer */
1247 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1248 return(AE_BAD_PARAMETER);
1249 if ((rp->Id == ACPI_RSTYPE_END_TAG) ||
1250 (rp->Length == 0)) {
1253 rp = ACPI_RESOURCE_NEXT(rp);
1257 * Check the size of the buffer and expand if required.
1260 * size of existing resources before terminator +
1261 * size of new resource and header +
1262 * size of terminator.
1264 * Note that this loop should really only run once, unless
1265 * for some reason we are stuffing a *really* huge resource.
1267 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
1268 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA +
1269 ACPI_RESOURCE_LENGTH) >= buf->Length) {
1270 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
1271 return(AE_NO_MEMORY);
1272 bcopy(buf->Pointer, newp, buf->Length);
1273 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
1274 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
1275 AcpiOsFree(buf->Pointer);
1276 buf->Pointer = newp;
1277 buf->Length += buf->Length;
1281 * Insert the new resource.
1283 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA);
1286 * And add the terminator.
1288 rp = ACPI_RESOURCE_NEXT(rp);
1289 rp->Id = ACPI_RSTYPE_END_TAG;
1295 #define ACPI_MINIMUM_AWAKETIME 5
1298 acpi_sleep_enable(void *arg)
1300 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
1304 * Set the system sleep state
1306 * Currently we only support S1 and S5
1309 acpi_SetSleepState(struct acpi_softc *sc, int state)
1311 ACPI_STATUS status = AE_OK;
1315 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1318 if (sc->acpi_sstate != ACPI_STATE_S0)
1319 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */
1321 if (sc->acpi_sleep_disabled)
1322 return_ACPI_STATUS(AE_OK);
1325 case ACPI_STATE_S0: /* XXX only for testing */
1326 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) {
1327 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
1335 if (ACPI_FAILURE(status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) {
1336 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", AcpiFormatException(status));
1340 sc->acpi_sstate = state;
1341 sc->acpi_sleep_disabled = 1;
1344 * Inform all devices that we are going to sleep.
1346 if (DEVICE_SUSPEND(root_bus) != 0) {
1348 * Re-wake the system.
1350 * XXX note that a better two-pass approach with a 'veto' pass
1351 * followed by a "real thing" pass would be better, but the
1352 * current bus interface does not provide for this.
1354 DEVICE_RESUME(root_bus);
1355 return_ACPI_STATUS(AE_ERROR);
1358 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) {
1359 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1360 AcpiFormatException(status));
1364 if (sc->acpi_sleep_delay > 0) {
1365 DELAY(sc->acpi_sleep_delay * 1000000);
1368 if (state != ACPI_STATE_S1) {
1369 acpi_sleep_machdep(sc, state);
1371 /* AcpiEnterSleepState() maybe incompleted, unlock here if locked. */
1372 if (AcpiGbl_AcpiMutexInfo[ACPI_MTX_HARDWARE].OwnerId != ACPI_MUTEX_NOT_ACQUIRED) {
1373 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE);
1376 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
1377 if (state == ACPI_STATE_S4) {
1381 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) {
1382 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
1386 AcpiLeaveSleepState((UINT8)state);
1387 DEVICE_RESUME(root_bus);
1388 sc->acpi_sstate = ACPI_STATE_S0;
1389 acpi_enable_fixed_events(sc);
1394 * Shut down cleanly and power off. This will call us back through the
1395 * shutdown handlers.
1397 shutdown_nice(RB_POWEROFF);
1401 status = AE_BAD_PARAMETER;
1405 if (sc->acpi_sleep_disabled)
1406 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME);
1408 return_ACPI_STATUS(status);
1412 * Enable/Disable ACPI
1415 acpi_Enable(struct acpi_softc *sc)
1420 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1423 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT |
1424 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
1425 if (!sc->acpi_enabled) {
1426 status = AcpiEnableSubsystem(flags);
1430 if (status == AE_OK)
1431 sc->acpi_enabled = 1;
1432 return_ACPI_STATUS(status);
1436 acpi_Disable(struct acpi_softc *sc)
1440 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1443 if (sc->acpi_enabled) {
1444 status = AcpiDisable();
1448 if (status == AE_OK)
1449 sc->acpi_enabled = 0;
1450 return_ACPI_STATUS(status);
1454 * ACPI Event Handlers
1457 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
1460 acpi_system_eventhandler_sleep(void *arg, int state)
1462 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1465 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
1466 acpi_SetSleepState((struct acpi_softc *)arg, state);
1472 acpi_system_eventhandler_wakeup(void *arg, int state)
1474 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1476 /* Well, what to do? :-) */
1485 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
1488 acpi_eventhandler_power_button_for_sleep(void *context)
1490 struct acpi_softc *sc = (struct acpi_softc *)context;
1492 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1494 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
1496 return_VALUE(ACPI_INTERRUPT_HANDLED);
1500 acpi_eventhandler_power_button_for_wakeup(void *context)
1502 struct acpi_softc *sc = (struct acpi_softc *)context;
1504 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1506 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
1508 return_VALUE(ACPI_INTERRUPT_HANDLED);
1512 acpi_eventhandler_sleep_button_for_sleep(void *context)
1514 struct acpi_softc *sc = (struct acpi_softc *)context;
1516 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1518 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
1520 return_VALUE(ACPI_INTERRUPT_HANDLED);
1524 acpi_eventhandler_sleep_button_for_wakeup(void *context)
1526 struct acpi_softc *sc = (struct acpi_softc *)context;
1528 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1530 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
1532 return_VALUE(ACPI_INTERRUPT_HANDLED);
1536 * XXX This is kinda ugly, and should not be here.
1538 struct acpi_staticbuf {
1544 acpi_name(ACPI_HANDLE handle)
1546 static struct acpi_staticbuf buf;
1550 buf.buffer.Length = 512;
1551 buf.buffer.Pointer = &buf.data[0];
1553 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer)))
1554 return(buf.buffer.Pointer);
1555 return("(unknown path)");
1559 * Debugging/bug-avoidance. Avoid trying to fetch info on various
1560 * parts of the namespace.
1563 acpi_avoid(ACPI_HANDLE handle)
1565 char *cp, *env, *np;
1568 np = acpi_name(handle);
1571 if ((env = getenv("debug.acpi.avoid")) == NULL)
1574 /* scan the avoid list checking for a match */
1577 while ((*cp != 0) && isspace(*cp))
1582 while ((cp[len] != 0) && !isspace(cp[len]))
1584 if (!strncmp(cp, np, len)) {
1595 * Debugging/bug-avoidance. Disable ACPI subsystem components.
1598 acpi_disabled(char *subsys)
1603 if ((env = getenv("debug.acpi.disable")) == NULL)
1605 if (!strcmp(env, "all")) {
1610 /* scan the disable list checking for a match */
1613 while ((*cp != 0) && isspace(*cp))
1618 while ((cp[len] != 0) && !isspace(cp[len]))
1620 if (!strncmp(cp, subsys, len)) {
1631 * Device wake capability enable/disable.
1634 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable)
1636 ACPI_OBJECT_LIST ArgList;
1640 * TBD: All Power Resources referenced by elements 2 through N
1641 * of the _PRW object are put into the ON state.
1645 * enable/disable device wake function.
1649 ArgList.Pointer = &Arg;
1651 Arg.Type = ACPI_TYPE_INTEGER;
1652 Arg.Integer.Value = enable;
1654 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL);
1658 acpi_device_enable_wake_event(ACPI_HANDLE h)
1660 struct acpi_softc *sc;
1662 ACPI_BUFFER prw_buffer;
1665 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1667 if ((sc = devclass_get_softc(acpi_devclass, 0)) == NULL) {
1672 * _PRW object is only required for devices that have the ability
1673 * to wake the system from a system sleeping state.
1675 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
1676 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
1677 if (ACPI_FAILURE(status)) {
1681 res = (ACPI_OBJECT *)prw_buffer.Pointer;
1686 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) {
1691 * The element 1 of the _PRW object:
1692 * The lowest power system sleeping state that can be entered
1693 * while still providing wake functionality.
1694 * The sleeping state being entered must be greater or equal to
1695 * the power state declared in element 1 of the _PRW object.
1697 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) {
1701 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) {
1706 * The element 0 of the _PRW object:
1708 switch(res->Package.Elements[0].Type) {
1709 case ACPI_TYPE_INTEGER:
1711 * If the data type of this package element is numeric, then this
1712 * _PRW package element is the bit index in the GPEx_EN, in the
1713 * GPE blocks described in the FADT, of the enable bit that is
1714 * enabled for the wake event.
1717 status = AcpiEnableEvent(res->Package.Elements[0].Integer.Value,
1718 ACPI_EVENT_GPE, ACPI_EVENT_WAKE_ENABLE);
1719 if (ACPI_FAILURE(status))
1720 printf("%s: EnableEvent Failed\n", __func__);
1723 case ACPI_TYPE_PACKAGE:
1727 * If the data type of this package element is a package, then this
1728 * _PRW package element is itself a package containing two
1729 * elements. The first is an object reference to the GPE Block
1730 * device that contains the GPE that will be triggered by the wake
1731 * event. The second element is numeric and it contains the bit
1732 * index in the GPEx_EN, in the GPE Block referenced by the
1733 * first element in the package, of the enable bit that is enabled for
1735 * For example, if this field is a package then it is of the form:
1736 * Package() {\_SB.PCI0.ISA.GPE, 2}
1746 if (prw_buffer.Pointer != NULL)
1747 AcpiOsFree(prw_buffer.Pointer);
1752 * Control interface.
1754 * We multiplex ioctls for all participating ACPI devices here. Individual
1755 * drivers wanting to be accessible via /dev/acpi should use the register/deregister
1756 * interface to make their handlers visible.
1758 struct acpi_ioctl_hook
1760 TAILQ_ENTRY(acpi_ioctl_hook) link;
1762 int (* fn)(u_long cmd, caddr_t addr, void *arg);
1766 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
1767 static int acpi_ioctl_hooks_initted;
1770 * Register an ioctl handler.
1773 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg)
1775 struct acpi_ioctl_hook *hp;
1777 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
1782 if (acpi_ioctl_hooks_initted == 0) {
1783 TAILQ_INIT(&acpi_ioctl_hooks);
1784 acpi_ioctl_hooks_initted = 1;
1786 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
1791 * Deregister an ioctl handler.
1794 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg))
1796 struct acpi_ioctl_hook *hp;
1798 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
1799 if ((hp->cmd == cmd) && (hp->fn == fn))
1803 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
1804 free(hp, M_ACPIDEV);
1809 acpiopen(dev_t dev, int flag, int fmt, struct thread *td)
1815 acpiclose(dev_t dev, int flag, int fmt, struct thread *td)
1821 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1823 struct acpi_softc *sc;
1824 struct acpi_ioctl_hook *hp;
1825 int error, xerror, state;
1833 * Scan the list of registered ioctls, looking for handlers.
1835 if (acpi_ioctl_hooks_initted) {
1836 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
1837 if (hp->cmd == cmd) {
1838 xerror = hp->fn(cmd, addr, hp->arg);
1847 * Core system ioctls.
1851 if (ACPI_FAILURE(acpi_Enable(sc)))
1855 case ACPIIO_DISABLE:
1856 if (ACPI_FAILURE(acpi_Disable(sc)))
1860 case ACPIIO_SETSLPSTATE:
1861 if (!sc->acpi_enabled) {
1865 state = *(int *)addr;
1866 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) {
1867 acpi_SetSleepState(sc, state);
1885 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
1887 char sleep_state[10];
1889 u_int new_state, old_state;
1891 old_state = *(u_int *)oidp->oid_arg1;
1892 if (old_state > ACPI_S_STATES_MAX+1) {
1893 strcpy(sleep_state, "unknown");
1895 bzero(sleep_state, sizeof(sleep_state));
1896 strncpy(sleep_state, sleep_state_names[old_state],
1897 sizeof(sleep_state_names[old_state]));
1899 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
1900 if (error == 0 && req->newptr != NULL) {
1901 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) {
1902 if (strncmp(sleep_state, sleep_state_names[new_state],
1903 sizeof(sleep_state)) == 0)
1906 if (new_state <= ACPI_S_STATES_MAX+1) {
1907 if (new_state != old_state) {
1908 *(u_int *)oidp->oid_arg1 = new_state;
1919 * Support for parsing debug options from the kernel environment.
1921 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
1922 * by specifying the names of the bits in the debug.acpi.layer and
1923 * debug.acpi.level environment variables. Bits may be unset by
1924 * prefixing the bit name with !.
1932 static struct debugtag dbg_layer[] = {
1933 {"ACPI_UTILITIES", ACPI_UTILITIES},
1934 {"ACPI_HARDWARE", ACPI_HARDWARE},
1935 {"ACPI_EVENTS", ACPI_EVENTS},
1936 {"ACPI_TABLES", ACPI_TABLES},
1937 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
1938 {"ACPI_PARSER", ACPI_PARSER},
1939 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
1940 {"ACPI_EXECUTER", ACPI_EXECUTER},
1941 {"ACPI_RESOURCES", ACPI_RESOURCES},
1942 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
1943 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
1944 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
1946 {"ACPI_BUS", ACPI_BUS},
1947 {"ACPI_SYSTEM", ACPI_SYSTEM},
1948 {"ACPI_POWER", ACPI_POWER},
1949 {"ACPI_EC", ACPI_EC},
1950 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
1951 {"ACPI_BATTERY", ACPI_BATTERY},
1952 {"ACPI_BUTTON", ACPI_BUTTON},
1953 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
1954 {"ACPI_THERMAL", ACPI_THERMAL},
1955 {"ACPI_FAN", ACPI_FAN},
1957 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
1958 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
1962 static struct debugtag dbg_level[] = {
1963 {"ACPI_LV_OK", ACPI_LV_OK},
1964 {"ACPI_LV_INFO", ACPI_LV_INFO},
1965 {"ACPI_LV_WARN", ACPI_LV_WARN},
1966 {"ACPI_LV_ERROR", ACPI_LV_ERROR},
1967 {"ACPI_LV_FATAL", ACPI_LV_FATAL},
1968 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
1969 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
1971 /* Trace verbosity level 1 [Standard Trace Level] */
1972 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
1973 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
1974 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
1975 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
1976 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
1977 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
1978 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
1979 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
1980 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
1981 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
1982 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
1983 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
1984 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
1985 {"ACPI_LV_INIT", ACPI_LV_INIT},
1986 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
1988 /* Trace verbosity level 2 [Function tracing and memory allocation] */
1989 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
1990 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
1991 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
1992 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
1993 {"ACPI_LV_ALL", ACPI_LV_ALL},
1995 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
1996 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
1997 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
1998 {"ACPI_LV_IO", ACPI_LV_IO},
1999 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
2000 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
2002 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
2003 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
2004 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
2005 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
2006 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
2007 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
2012 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
2024 while (*ep && !isspace(*ep))
2035 for (i = 0; tag[i].name != NULL; i++) {
2036 if (!strncmp(cp, tag[i].name, l)) {
2038 *flag |= tag[i].value;
2040 *flag &= ~tag[i].value;
2042 printf("ACPI_DEBUG: set '%s'\n", tag[i].name);
2050 acpi_set_debugging(void *junk)
2056 if ((cp = getenv("debug.acpi.layer")) != NULL) {
2057 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer);
2060 if ((cp = getenv("debug.acpi.level")) != NULL) {
2061 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel);
2065 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel);
2067 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL);
2071 acpi_pm_func(u_long cmd, void *arg, ...)
2073 int state, acpi_state;
2075 struct acpi_softc *sc;
2080 case POWER_CMD_SUSPEND:
2081 sc = (struct acpi_softc *)arg;
2088 state = va_arg(ap, int);
2092 case POWER_SLEEP_STATE_STANDBY:
2093 acpi_state = sc->acpi_standby_sx;
2095 case POWER_SLEEP_STATE_SUSPEND:
2096 acpi_state = sc->acpi_suspend_sx;
2098 case POWER_SLEEP_STATE_HIBERNATE:
2099 acpi_state = ACPI_STATE_S4;
2106 acpi_SetSleepState(sc, acpi_state);
2119 acpi_pm_register(void *arg)
2123 if (!resource_int_value("acpi", 0, "disabled", &error) &&
2127 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
2130 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);