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)
211 #ifdef ENABLE_DEBUGGER
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.
241 #ifdef ENABLE_DEBUGGER
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));
253 #ifdef ENABLE_DEBUGGER
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;
317 #ifdef ENABLE_DEBUGGER
321 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
323 sc = device_get_softc(dev);
324 bzero(sc, sizeof(*sc));
327 #ifdef ENABLE_DEBUGGER
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.
374 #ifdef ENABLE_DEBUGGER
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, "s4bios", CTLFLAG_RD | CTLFLAG_RW,
421 &sc->acpi_s4bios, 0, "S4BIOS mode");
422 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
423 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW,
424 &sc->acpi_verbose, 0, "verbose mode");
427 sc->acpi_verbose = 1;
430 * Dispatch the default sleep state to devices.
431 * TBD: should be configured from userland policy manager.
433 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX;
434 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX;
435 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX;
436 sc->acpi_standby_sx = ACPI_STATE_S1;
437 sc->acpi_suspend_sx = ACPI_STATE_S3;
439 acpi_enable_fixed_events(sc);
442 * Scan the namespace and attach/initialise children.
444 #ifdef ENABLE_DEBUGGER
445 debugpoint = getenv("debug.acpi.debugger");
447 if (!strcmp(debugpoint, "probe"))
448 acpi_EnterDebugger();
452 if (!acpi_disabled("bus"))
453 acpi_probe_children(dev);
456 * Register our shutdown handlers
458 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST);
459 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST);
462 * Register our acpi event handlers.
463 * XXX should be configurable eg. via userland policy manager.
465 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST);
466 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST);
469 * Flag our initial states.
471 sc->acpi_enabled = 1;
472 sc->acpi_sstate = ACPI_STATE_S0;
473 sc->acpi_sleep_disabled = 0;
476 * Create the control device
478 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi");
479 sc->acpi_dev_t->si_drv1 = sc;
481 #ifdef ENABLE_DEBUGGER
482 debugpoint = getenv("debug.acpi.debugger");
484 if (!strcmp(debugpoint, "running"))
485 acpi_EnterDebugger();
490 #if defined(ACPI_MAX_THREADS) && ACPI_MAX_THREADS > 0
491 if ((error = acpi_task_thread_init())) {
496 if ((error = acpi_machdep_init(dev))) {
500 /* Register ACPI again to pass the correct argument of pm_func. */
501 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
511 * Handle a new device being added
514 acpi_add_child(device_t bus, int order, const char *name, int unit)
516 struct acpi_device *ad;
519 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL)
521 bzero(ad, sizeof(*ad));
523 resource_list_init(&ad->ad_rl);
525 child = device_add_child_ordered(bus, order, name, unit);
527 device_set_ivars(child, ad);
532 * Print child device resource usage
535 acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format)
537 struct resource_list_entry *rle;
543 if (!SLIST_FIRST(rl))
546 /* Yes, this is kinda cheating */
547 SLIST_FOREACH(rle, rl, link) {
548 if (rle->type == type) {
550 retval += printf(" %s ", name);
551 else if (printed > 0)
552 retval += printf(",");
554 retval += printf(format, rle->start);
555 if (rle->count > 1) {
556 retval += printf("-");
557 retval += printf(format, rle->start +
566 acpi_print_child(device_t bus, device_t child)
568 struct acpi_device *adev = device_get_ivars(child);
569 struct resource_list *rl = &adev->ad_rl;
572 retval += bus_print_child_header(bus, child);
573 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx");
574 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx");
575 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld");
576 retval += acpi_print_resources(rl, "drq", SYS_RES_DRQ, "%ld");
577 retval += bus_print_child_footer(bus, child);
584 * Handle per-device ivars
587 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
589 struct acpi_device *ad;
591 if ((ad = device_get_ivars(child)) == NULL) {
592 printf("device has no ivars\n");
598 case ACPI_IVAR_HANDLE:
599 *(ACPI_HANDLE *)result = ad->ad_handle;
601 case ACPI_IVAR_MAGIC:
602 *(int *)result = ad->ad_magic;
604 case ACPI_IVAR_PRIVATE:
605 *(void **)result = ad->ad_private;
608 /* ISA compatibility */
609 case ISA_IVAR_VENDORID:
610 case ISA_IVAR_SERIAL:
611 case ISA_IVAR_COMPATID:
615 case ISA_IVAR_LOGICALID:
616 *(int *)result = acpi_isa_get_logicalid(child);
620 panic("bad ivar read request (%d)\n", index);
627 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
629 struct acpi_device *ad;
631 if ((ad = device_get_ivars(child)) == NULL) {
632 printf("device has no ivars\n");
638 case ACPI_IVAR_HANDLE:
639 ad->ad_handle = (ACPI_HANDLE)value;
641 case ACPI_IVAR_MAGIC:
642 ad->ad_magic = (int )value;
644 case ACPI_IVAR_PRIVATE:
645 ad->ad_private = (void *)value;
649 panic("bad ivar write request (%d)\n", index);
656 * Handle child resource allocation/removal
659 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count)
661 struct acpi_device *ad = device_get_ivars(child);
662 struct resource_list *rl = &ad->ad_rl;
664 resource_list_add(rl, type, rid, start, start + count -1, count);
670 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
672 struct acpi_device *ad = device_get_ivars(child);
673 struct resource_list *rl = &ad->ad_rl;
674 struct resource_list_entry *rle;
676 rle = resource_list_find(rl, type, rid);
681 *startp = rle->start;
683 *countp = rle->count;
688 static struct resource *
689 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
690 u_long start, u_long end, u_long count, u_int flags)
692 struct acpi_device *ad = device_get_ivars(child);
693 struct resource_list *rl = &ad->ad_rl;
695 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags));
699 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r)
701 struct acpi_device *ad = device_get_ivars(child);
702 struct resource_list *rl = &ad->ad_rl;
704 return(resource_list_release(rl, bus, child, type, rid, r));
708 * Handle ISA-like devices probing for a PnP ID to match.
710 #define PNP_EISAID(s) \
711 ((((s[0] - '@') & 0x1f) << 2) \
712 | (((s[1] - '@') & 0x18) >> 3) \
713 | (((s[1] - '@') & 0x07) << 13) \
714 | (((s[2] - '@') & 0x1f) << 8) \
715 | (PNP_HEXTONUM(s[4]) << 16) \
716 | (PNP_HEXTONUM(s[3]) << 20) \
717 | (PNP_HEXTONUM(s[6]) << 24) \
718 | (PNP_HEXTONUM(s[5]) << 28))
721 acpi_isa_get_logicalid(device_t dev)
724 ACPI_DEVICE_INFO devinfo;
728 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
733 /* fetch and validate the HID */
734 if ((h = acpi_get_handle(dev)) == NULL)
736 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
738 if (!(devinfo.Valid & ACPI_VALID_HID))
741 pnpid = PNP_EISAID(devinfo.HardwareId);
748 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
753 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
756 * ISA-style drivers attached to ACPI may persist and
757 * probe manually if we return ENOENT. We never want
758 * that to happen, so don't ever return it.
762 /* scan the supplied IDs for a match */
763 pnpid = acpi_isa_get_logicalid(child);
764 while (ids && ids->ip_id) {
765 if (pnpid == ids->ip_id) {
772 return_VALUE(result);
776 * Scan relevant portions of the ACPI namespace and attach child devices.
778 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes,
779 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec.
782 acpi_probe_children(device_t bus)
785 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL};
788 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
792 * Create any static children by calling device identify methods.
794 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
795 bus_generic_probe(bus);
798 * Scan the namespace and insert placeholders for all the devices that
801 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
802 * we want to create nodes for all devices, not just those that are currently
803 * present. (This assumes that we don't want to create/remove devices as they
804 * appear, which might be smarter.)
806 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
807 for (i = 0; scopes[i] != NULL; i++)
808 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)))
809 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL);
812 * Scan all of the child devices we have created and let them probe/attach.
814 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
815 bus_generic_attach(bus);
818 * Some of these children may have attached others as part of their attach
819 * process (eg. the root PCI bus driver), so rescan.
821 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
822 bus_generic_attach(bus);
824 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
829 * Evaluate a child device and determine whether we might attach a device to
833 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
835 ACPI_OBJECT_TYPE type;
836 device_t child, bus = (device_t)context;
838 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
841 * Skip this device if we think we'll have trouble with it.
843 if (acpi_avoid(handle))
844 return_ACPI_STATUS(AE_OK);
846 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
848 case ACPI_TYPE_DEVICE:
849 case ACPI_TYPE_PROCESSOR:
850 case ACPI_TYPE_THERMAL:
851 case ACPI_TYPE_POWER:
852 if (acpi_disabled("children"))
855 * Create a placeholder device for this node. Sort the placeholder
856 * so that the probe/attach passes will run breadth-first.
858 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle)));
859 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1);
862 acpi_set_handle(child, handle);
865 * Check that the device is present. If it's not present,
866 * leave it disabled (so that we have a device_t attached to
867 * the handle, but we don't probe it).
869 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) {
870 device_disable(child);
875 * Get the device's resource settings and attach them.
876 * Note that if the device has _PRS but no _CRS, we need
877 * to decide when it's appropriate to try to configure the
878 * device. Ignore the return value here; it's OK for the
879 * device not to have any resources.
881 acpi_parse_resources(child, handle, &acpi_res_parse_set);
883 /* if we're debugging, probe/attach now rather than later */
884 ACPI_DEBUG_EXEC(device_probe_and_attach(child));
888 return_ACPI_STATUS(AE_OK);
892 acpi_shutdown_pre_sync(void *arg, int howto)
898 * Disable all ACPI events before soft off, otherwise the system
899 * will be turned on again on some laptops.
901 * XXX this should probably be restricted to masking some events just
902 * before powering down, since we may still need ACPI during the
905 acpi_Disable((struct acpi_softc *)arg);
909 acpi_shutdown_final(void *arg, int howto)
915 if (howto & RB_POWEROFF) {
916 printf("Power system off using ACPI...\n");
917 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(acpi_off_state))) {
918 printf("AcpiEnterSleepStatePrep failed - %s\n",
919 AcpiFormatException(status));
922 if (ACPI_FAILURE(status = AcpiEnterSleepState(acpi_off_state))) {
923 printf("ACPI power-off failed - %s\n", AcpiFormatException(status));
926 printf("ACPI power-off failed - timeout\n");
929 printf("Terminate ACPI\n");
935 acpi_enable_fixed_events(struct acpi_softc *sc)
937 static int first_time = 1;
938 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n"
942 /* Enable and clear fixed events and install handlers. */
943 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) {
944 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED, 0);
945 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED);
946 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
947 acpi_eventhandler_power_button_for_sleep, sc);
949 device_printf(sc->acpi_dev, MSGFORMAT, "power");
952 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) {
953 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED, 0);
954 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED);
955 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
956 acpi_eventhandler_sleep_button_for_sleep, sc);
958 device_printf(sc->acpi_dev, MSGFORMAT, "sleep");
966 * Returns true if the device is actually present and should
967 * be attached to. This requires the present, enabled, UI-visible
968 * and diagnostics-passed bits to be set.
971 acpi_DeviceIsPresent(device_t dev)
974 ACPI_DEVICE_INFO devinfo;
979 if ((h = acpi_get_handle(dev)) == NULL)
981 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
983 /* if no _STA method, must be present */
984 if (!(devinfo.Valid & ACPI_VALID_STA))
986 /* return true for 'present' and 'functioning' */
987 if ((devinfo.CurrentStatus & 0x9) == 0x9)
993 * Returns true if the battery is actually present and inserted.
996 acpi_BatteryIsPresent(device_t dev)
999 ACPI_DEVICE_INFO devinfo;
1004 if ((h = acpi_get_handle(dev)) == NULL)
1006 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1008 /* if no _STA method, must be present */
1009 if (!(devinfo.Valid & ACPI_VALID_STA))
1011 /* return true for 'present' and 'functioning' */
1012 if ((devinfo.CurrentStatus & 0x19) == 0x19)
1018 * Match a HID string against a device
1021 acpi_MatchHid(device_t dev, char *hid)
1024 ACPI_DEVICE_INFO devinfo;
1032 if ((h = acpi_get_handle(dev)) == NULL)
1034 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1036 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId))
1038 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid)))
1040 if (cid == PNP_EISAID(hid))
1046 * Return the handle of a named object within our scope, ie. that of (parent)
1047 * or one if its parents.
1050 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1057 /* walk back up the tree to the root */
1059 if (ACPI_SUCCESS(status = AcpiGetHandle(parent, path, &r))) {
1063 if (status != AE_NOT_FOUND)
1065 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1066 return(AE_NOT_FOUND);
1072 * Allocate a buffer with a preset data size.
1075 acpi_AllocBuffer(int size)
1079 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
1082 buf->Pointer = (void *)(buf + 1);
1087 * Evaluate a path that should return an integer.
1090 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number)
1099 handle = ACPI_ROOT_OBJECT;
1102 * Assume that what we've been pointed at is an Integer object, or
1103 * a method that will return an Integer.
1105 buf.Pointer = ¶m;
1106 buf.Length = sizeof(param);
1107 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) {
1108 if (param.Type == ACPI_TYPE_INTEGER) {
1109 *number = param.Integer.Value;
1116 * In some applications, a method that's expected to return an Integer
1117 * may instead return a Buffer (probably to simplify some internal
1118 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1119 * convert it into an Integer as best we can.
1123 if (error == AE_BUFFER_OVERFLOW) {
1124 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1125 error = AE_NO_MEMORY;
1127 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) {
1128 error = acpi_ConvertBufferToInteger(&buf, number);
1131 AcpiOsFree(buf.Pointer);
1137 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number)
1142 p = (ACPI_OBJECT *)bufp->Pointer;
1143 if (p->Type == ACPI_TYPE_INTEGER) {
1144 *number = p->Integer.Value;
1147 if (p->Type != ACPI_TYPE_BUFFER)
1149 if (p->Buffer.Length > sizeof(int))
1150 return(AE_BAD_DATA);
1152 for (i = 0; i < p->Buffer.Length; i++)
1153 *number += (*(p->Buffer.Pointer + i) << (i * 8));
1158 * Iterate over the elements of an a package object, calling the supplied
1159 * function for each element.
1161 * XXX possible enhancement might be to abort traversal on error.
1164 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg)
1169 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE))
1170 return(AE_BAD_PARAMETER);
1172 /* iterate over components */
1173 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++)
1180 * Find the (index)th resource object in a set.
1183 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
1188 rp = (ACPI_RESOURCE *)buf->Pointer;
1192 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1193 return(AE_BAD_PARAMETER);
1194 /* check for terminator */
1195 if ((rp->Id == ACPI_RSTYPE_END_TAG) ||
1197 return(AE_NOT_FOUND);
1198 rp = ACPI_RESOURCE_NEXT(rp);
1206 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
1208 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
1209 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
1210 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
1213 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
1216 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
1222 * Initialise the buffer if necessary.
1224 if (buf->Pointer == NULL) {
1225 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
1226 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
1227 return(AE_NO_MEMORY);
1228 rp = (ACPI_RESOURCE *)buf->Pointer;
1229 rp->Id = ACPI_RSTYPE_END_TAG;
1236 * Scan the current buffer looking for the terminator.
1237 * This will either find the terminator or hit the end
1238 * of the buffer and return an error.
1240 rp = (ACPI_RESOURCE *)buf->Pointer;
1242 /* range check, don't go outside the buffer */
1243 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1244 return(AE_BAD_PARAMETER);
1245 if ((rp->Id == ACPI_RSTYPE_END_TAG) ||
1246 (rp->Length == 0)) {
1249 rp = ACPI_RESOURCE_NEXT(rp);
1253 * Check the size of the buffer and expand if required.
1256 * size of existing resources before terminator +
1257 * size of new resource and header +
1258 * size of terminator.
1260 * Note that this loop should really only run once, unless
1261 * for some reason we are stuffing a *really* huge resource.
1263 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
1264 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA +
1265 ACPI_RESOURCE_LENGTH) >= buf->Length) {
1266 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
1267 return(AE_NO_MEMORY);
1268 bcopy(buf->Pointer, newp, buf->Length);
1269 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
1270 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
1271 AcpiOsFree(buf->Pointer);
1272 buf->Pointer = newp;
1273 buf->Length += buf->Length;
1277 * Insert the new resource.
1279 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA);
1282 * And add the terminator.
1284 rp = ACPI_RESOURCE_NEXT(rp);
1285 rp->Id = ACPI_RSTYPE_END_TAG;
1291 #define ACPI_MINIMUM_AWAKETIME 5
1294 acpi_sleep_enable(void *arg)
1296 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
1300 * Set the system sleep state
1302 * Currently we only support S1 and S5
1305 acpi_SetSleepState(struct acpi_softc *sc, int state)
1307 ACPI_STATUS status = AE_OK;
1311 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1314 if (sc->acpi_sstate != ACPI_STATE_S0)
1315 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */
1317 if (sc->acpi_sleep_disabled)
1318 return_ACPI_STATUS(AE_OK);
1321 case ACPI_STATE_S0: /* XXX only for testing */
1322 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) {
1323 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
1331 if (ACPI_FAILURE(status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) {
1332 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", AcpiFormatException(status));
1336 sc->acpi_sstate = state;
1337 sc->acpi_sleep_disabled = 1;
1340 * Inform all devices that we are going to sleep.
1342 if (DEVICE_SUSPEND(root_bus) != 0) {
1344 * Re-wake the system.
1346 * XXX note that a better two-pass approach with a 'veto' pass
1347 * followed by a "real thing" pass would be better, but the
1348 * current bus interface does not provide for this.
1350 DEVICE_RESUME(root_bus);
1351 return_ACPI_STATUS(AE_ERROR);
1354 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) {
1355 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1356 AcpiFormatException(status));
1360 if (state != ACPI_STATE_S1) {
1361 acpi_sleep_machdep(sc, state);
1363 /* AcpiEnterSleepState() maybe incompleted, unlock here if locked. */
1364 if (AcpiGbl_AcpiMutexInfo[ACPI_MTX_HARDWARE].OwnerId != ACPI_MUTEX_NOT_ACQUIRED) {
1365 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE);
1368 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
1369 if (state == ACPI_STATE_S4) {
1373 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) {
1374 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
1378 AcpiLeaveSleepState((UINT8)state);
1379 DEVICE_RESUME(root_bus);
1380 sc->acpi_sstate = ACPI_STATE_S0;
1381 acpi_enable_fixed_events(sc);
1386 * Shut down cleanly and power off. This will call us back through the
1387 * shutdown handlers.
1389 shutdown_nice(RB_POWEROFF);
1393 status = AE_BAD_PARAMETER;
1397 if (sc->acpi_sleep_disabled)
1398 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME);
1400 return_ACPI_STATUS(status);
1404 * Enable/Disable ACPI
1407 acpi_Enable(struct acpi_softc *sc)
1412 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1415 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT |
1416 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
1417 if (!sc->acpi_enabled) {
1418 status = AcpiEnableSubsystem(flags);
1422 if (status == AE_OK)
1423 sc->acpi_enabled = 1;
1424 return_ACPI_STATUS(status);
1428 acpi_Disable(struct acpi_softc *sc)
1432 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1435 if (sc->acpi_enabled) {
1436 status = AcpiDisable();
1440 if (status == AE_OK)
1441 sc->acpi_enabled = 0;
1442 return_ACPI_STATUS(status);
1446 * ACPI Event Handlers
1449 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
1452 acpi_system_eventhandler_sleep(void *arg, int state)
1454 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1457 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
1458 acpi_SetSleepState((struct acpi_softc *)arg, state);
1464 acpi_system_eventhandler_wakeup(void *arg, int state)
1466 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1468 /* Well, what to do? :-) */
1477 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
1480 acpi_eventhandler_power_button_for_sleep(void *context)
1482 struct acpi_softc *sc = (struct acpi_softc *)context;
1484 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1486 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
1488 return_VALUE(ACPI_INTERRUPT_HANDLED);
1492 acpi_eventhandler_power_button_for_wakeup(void *context)
1494 struct acpi_softc *sc = (struct acpi_softc *)context;
1496 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1498 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
1500 return_VALUE(ACPI_INTERRUPT_HANDLED);
1504 acpi_eventhandler_sleep_button_for_sleep(void *context)
1506 struct acpi_softc *sc = (struct acpi_softc *)context;
1508 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1510 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
1512 return_VALUE(ACPI_INTERRUPT_HANDLED);
1516 acpi_eventhandler_sleep_button_for_wakeup(void *context)
1518 struct acpi_softc *sc = (struct acpi_softc *)context;
1520 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1522 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
1524 return_VALUE(ACPI_INTERRUPT_HANDLED);
1528 * XXX This is kinda ugly, and should not be here.
1530 struct acpi_staticbuf {
1536 acpi_name(ACPI_HANDLE handle)
1538 static struct acpi_staticbuf buf;
1542 buf.buffer.Length = 512;
1543 buf.buffer.Pointer = &buf.data[0];
1545 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer)))
1546 return(buf.buffer.Pointer);
1547 return("(unknown path)");
1551 * Debugging/bug-avoidance. Avoid trying to fetch info on various
1552 * parts of the namespace.
1555 acpi_avoid(ACPI_HANDLE handle)
1557 char *cp, *env, *np;
1560 np = acpi_name(handle);
1563 if ((env = getenv("debug.acpi.avoid")) == NULL)
1566 /* scan the avoid list checking for a match */
1569 while ((*cp != 0) && isspace(*cp))
1574 while ((cp[len] != 0) && !isspace(cp[len]))
1576 if (!strncmp(cp, np, len)) {
1587 * Debugging/bug-avoidance. Disable ACPI subsystem components.
1590 acpi_disabled(char *subsys)
1595 if ((env = getenv("debug.acpi.disable")) == NULL)
1597 if (!strcmp(env, "all")) {
1602 /* scan the disable list checking for a match */
1605 while ((*cp != 0) && isspace(*cp))
1610 while ((cp[len] != 0) && !isspace(cp[len]))
1612 if (!strncmp(cp, subsys, len)) {
1623 * Device wake capability enable/disable.
1626 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable)
1628 ACPI_OBJECT_LIST ArgList;
1632 * TBD: All Power Resources referenced by elements 2 through N
1633 * of the _PRW object are put into the ON state.
1637 * enable/disable device wake function.
1641 ArgList.Pointer = &Arg;
1643 Arg.Type = ACPI_TYPE_INTEGER;
1644 Arg.Integer.Value = enable;
1646 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL);
1650 acpi_device_enable_wake_event(ACPI_HANDLE h)
1652 struct acpi_softc *sc;
1654 ACPI_BUFFER prw_buffer;
1657 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1659 if ((sc = devclass_get_softc(acpi_devclass, 0)) == NULL) {
1664 * _PRW object is only required for devices that have the ability
1665 * to wake the system from a system sleeping state.
1667 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
1668 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
1669 if (ACPI_FAILURE(status)) {
1673 res = (ACPI_OBJECT *)prw_buffer.Pointer;
1678 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) {
1683 * The element 1 of the _PRW object:
1684 * The lowest power system sleeping state that can be entered
1685 * while still providing wake functionality.
1686 * The sleeping state being entered must be greater or equal to
1687 * the power state declared in element 1 of the _PRW object.
1689 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) {
1693 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) {
1698 * The element 0 of the _PRW object:
1700 switch(res->Package.Elements[0].Type) {
1701 case ACPI_TYPE_INTEGER:
1703 * If the data type of this package element is numeric, then this
1704 * _PRW package element is the bit index in the GPEx_EN, in the
1705 * GPE blocks described in the FADT, of the enable bit that is
1706 * enabled for the wake event.
1709 status = AcpiEnableEvent(res->Package.Elements[0].Integer.Value,
1710 ACPI_EVENT_GPE, ACPI_EVENT_WAKE_ENABLE);
1711 if (ACPI_FAILURE(status))
1712 printf("%s: EnableEvent Failed\n", __func__);
1715 case ACPI_TYPE_PACKAGE:
1719 * If the data type of this package element is a package, then this
1720 * _PRW package element is itself a package containing two
1721 * elements. The first is an object reference to the GPE Block
1722 * device that contains the GPE that will be triggered by the wake
1723 * event. The second element is numeric and it contains the bit
1724 * index in the GPEx_EN, in the GPE Block referenced by the
1725 * first element in the package, of the enable bit that is enabled for
1727 * For example, if this field is a package then it is of the form:
1728 * Package() {\_SB.PCI0.ISA.GPE, 2}
1738 if (prw_buffer.Pointer != NULL)
1739 AcpiOsFree(prw_buffer.Pointer);
1744 * Control interface.
1746 * We multiplex ioctls for all participating ACPI devices here. Individual
1747 * drivers wanting to be accessible via /dev/acpi should use the register/deregister
1748 * interface to make their handlers visible.
1750 struct acpi_ioctl_hook
1752 TAILQ_ENTRY(acpi_ioctl_hook) link;
1754 int (* fn)(u_long cmd, caddr_t addr, void *arg);
1758 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
1759 static int acpi_ioctl_hooks_initted;
1762 * Register an ioctl handler.
1765 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg)
1767 struct acpi_ioctl_hook *hp;
1769 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
1774 if (acpi_ioctl_hooks_initted == 0) {
1775 TAILQ_INIT(&acpi_ioctl_hooks);
1776 acpi_ioctl_hooks_initted = 1;
1778 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
1783 * Deregister an ioctl handler.
1786 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg))
1788 struct acpi_ioctl_hook *hp;
1790 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
1791 if ((hp->cmd == cmd) && (hp->fn == fn))
1795 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
1796 free(hp, M_ACPIDEV);
1801 acpiopen(dev_t dev, int flag, int fmt, struct thread *td)
1807 acpiclose(dev_t dev, int flag, int fmt, struct thread *td)
1813 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1815 struct acpi_softc *sc;
1816 struct acpi_ioctl_hook *hp;
1817 int error, xerror, state;
1825 * Scan the list of registered ioctls, looking for handlers.
1827 if (acpi_ioctl_hooks_initted) {
1828 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
1829 if (hp->cmd == cmd) {
1830 xerror = hp->fn(cmd, addr, hp->arg);
1839 * Core system ioctls.
1843 if (ACPI_FAILURE(acpi_Enable(sc)))
1847 case ACPIIO_DISABLE:
1848 if (ACPI_FAILURE(acpi_Disable(sc)))
1852 case ACPIIO_SETSLPSTATE:
1853 if (!sc->acpi_enabled) {
1857 state = *(int *)addr;
1858 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) {
1859 acpi_SetSleepState(sc, state);
1877 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
1879 char sleep_state[10];
1881 u_int new_state, old_state;
1883 old_state = *(u_int *)oidp->oid_arg1;
1884 if (old_state > ACPI_S_STATES_MAX+1) {
1885 strcpy(sleep_state, "unknown");
1887 bzero(sleep_state, sizeof(sleep_state));
1888 strncpy(sleep_state, sleep_state_names[old_state],
1889 sizeof(sleep_state_names[old_state]));
1891 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
1892 if (error == 0 && req->newptr != NULL) {
1893 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) {
1894 if (strncmp(sleep_state, sleep_state_names[new_state],
1895 sizeof(sleep_state)) == 0)
1898 if (new_state <= ACPI_S_STATES_MAX+1) {
1899 if (new_state != old_state) {
1900 *(u_int *)oidp->oid_arg1 = new_state;
1911 * Support for parsing debug options from the kernel environment.
1913 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
1914 * by specifying the names of the bits in the debug.acpi.layer and
1915 * debug.acpi.level environment variables. Bits may be unset by
1916 * prefixing the bit name with !.
1924 static struct debugtag dbg_layer[] = {
1925 {"ACPI_UTILITIES", ACPI_UTILITIES},
1926 {"ACPI_HARDWARE", ACPI_HARDWARE},
1927 {"ACPI_EVENTS", ACPI_EVENTS},
1928 {"ACPI_TABLES", ACPI_TABLES},
1929 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
1930 {"ACPI_PARSER", ACPI_PARSER},
1931 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
1932 {"ACPI_EXECUTER", ACPI_EXECUTER},
1933 {"ACPI_RESOURCES", ACPI_RESOURCES},
1934 {"ACPI_DEBUGGER", ACPI_DEBUGGER},
1935 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
1937 {"ACPI_BUS", ACPI_BUS},
1938 {"ACPI_SYSTEM", ACPI_SYSTEM},
1939 {"ACPI_POWER", ACPI_POWER},
1940 {"ACPI_EC", ACPI_EC},
1941 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
1942 {"ACPI_BATTERY", ACPI_BATTERY},
1943 {"ACPI_BUTTON", ACPI_BUTTON},
1944 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
1945 {"ACPI_THERMAL", ACPI_THERMAL},
1946 {"ACPI_FAN", ACPI_FAN},
1948 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
1949 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
1953 static struct debugtag dbg_level[] = {
1954 {"ACPI_LV_OK", ACPI_LV_OK},
1955 {"ACPI_LV_INFO", ACPI_LV_INFO},
1956 {"ACPI_LV_WARN", ACPI_LV_WARN},
1957 {"ACPI_LV_ERROR", ACPI_LV_ERROR},
1958 {"ACPI_LV_FATAL", ACPI_LV_FATAL},
1959 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
1960 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
1961 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
1962 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
1963 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
1964 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
1965 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
1966 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
1967 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
1968 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
1969 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
1970 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
1971 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
1972 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
1973 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
1974 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
1975 {"ACPI_LV_IO", ACPI_LV_IO},
1976 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
1977 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
1978 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
1979 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
1980 {"ACPI_LV_INIT", ACPI_LV_INIT},
1981 {"ACPI_LV_ALL", ACPI_LV_ALL},
1982 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
1983 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
1984 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
1985 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
1986 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
1991 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
2003 while (*ep && !isspace(*ep))
2014 for (i = 0; tag[i].name != NULL; i++) {
2015 if (!strncmp(cp, tag[i].name, l)) {
2017 *flag |= tag[i].value;
2019 *flag &= ~tag[i].value;
2021 printf("ACPI_DEBUG: set '%s'\n", tag[i].name);
2029 acpi_set_debugging(void *junk)
2035 if ((cp = getenv("debug.acpi.layer")) != NULL) {
2036 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer);
2039 if ((cp = getenv("debug.acpi.level")) != NULL) {
2040 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel);
2044 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel);
2046 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL);
2050 acpi_pm_func(u_long cmd, void *arg, ...)
2052 int state, acpi_state;
2054 struct acpi_softc *sc;
2059 case POWER_CMD_SUSPEND:
2060 sc = (struct acpi_softc *)arg;
2067 state = va_arg(ap, int);
2071 case POWER_SLEEP_STATE_STANDBY:
2072 acpi_state = sc->acpi_standby_sx;
2074 case POWER_SLEEP_STATE_SUSPEND:
2075 acpi_state = sc->acpi_suspend_sx;
2077 case POWER_SLEEP_STATE_HIBERNATE:
2078 acpi_state = ACPI_STATE_S4;
2085 acpi_SetSleepState(sc, acpi_state);
2098 acpi_pm_register(void *arg)
2101 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
2104 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);