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
29 * $FreeBSD: src/sys/dev/acpica/acpi.c,v 1.95.2.1 2003/08/22 20:49:20 jhb Exp $
30 * $DragonFly: src/sys/dev/acpica/Attic/acpi.c,v 1.7 2004/09/15 01:39:10 joerg Exp $
34 #include <sys/param.h>
35 #include <sys/kernel.h>
37 #include <sys/fcntl.h>
38 #include <sys/malloc.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 <bus/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 = {
85 .old_close = acpiclose,
86 .old_ioctl = acpiioctl,
96 static const char* sleep_state_names[] = {
97 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
99 /* this has to be static, as the softc is gone when we need it */
100 static int acpi_off_state = ACPI_STATE_S5;
102 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
103 struct mtx acpi_mutex;
106 static int acpi_modevent(struct module *mod, int event, void *junk);
107 static void acpi_identify(driver_t *driver, device_t parent);
108 static int acpi_probe(device_t dev);
109 static int acpi_attach(device_t dev);
110 static device_t acpi_add_child(device_t bus, int order, const char *name, int unit);
111 static int acpi_print_child(device_t bus, device_t child);
112 static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result);
113 static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value);
114 static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start,
116 static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp,
118 static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
119 u_long start, u_long end, u_long count, u_int flags);
120 static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r);
121 static u_int32_t acpi_isa_get_logicalid(device_t dev);
122 static u_int32_t acpi_isa_get_compatid(device_t dev);
123 static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids);
125 static void acpi_probe_children(device_t bus);
126 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status);
128 static void acpi_shutdown_pre_sync(void *arg, int howto);
129 static void acpi_shutdown_final(void *arg, int howto);
131 static void acpi_enable_fixed_events(struct acpi_softc *sc);
133 static void acpi_system_eventhandler_sleep(void *arg, int state);
134 static void acpi_system_eventhandler_wakeup(void *arg, int state);
135 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
136 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
138 static int acpi_pm_func(u_long cmd, void *arg, ...);
140 static device_method_t acpi_methods[] = {
141 /* Device interface */
142 DEVMETHOD(device_identify, acpi_identify),
143 DEVMETHOD(device_probe, acpi_probe),
144 DEVMETHOD(device_attach, acpi_attach),
145 DEVMETHOD(device_shutdown, bus_generic_shutdown),
146 DEVMETHOD(device_suspend, bus_generic_suspend),
147 DEVMETHOD(device_resume, bus_generic_resume),
150 DEVMETHOD(bus_add_child, acpi_add_child),
151 DEVMETHOD(bus_print_child, acpi_print_child),
152 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
153 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
154 DEVMETHOD(bus_set_resource, acpi_set_resource),
155 DEVMETHOD(bus_get_resource, acpi_get_resource),
156 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
157 DEVMETHOD(bus_release_resource, acpi_release_resource),
158 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
159 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
160 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
161 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
162 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
165 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
170 static driver_t acpi_driver = {
173 sizeof(struct acpi_softc),
176 static devclass_t acpi_devclass;
177 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
178 MODULE_VERSION(acpi, 100);
180 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, "");
181 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, "");
182 static int acpi_ca_version = ACPI_CA_VERSION;
183 SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, "");
186 * ACPI can only be loaded as a module by the loader; activating it after
187 * system bootstrap time is not useful, and can be fatal to the system.
188 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it.
191 acpi_modevent(struct module *mod, int event, void *junk)
196 printf("The ACPI driver cannot be loaded after boot.\n");
201 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
211 * Detect ACPI, perform early initialisation
214 acpi_identify(driver_t *driver, device_t parent)
222 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
228 * Check that we haven't been disabled with a hint.
230 if (!resource_int_value("acpi", 0, "disabled", &error) &&
235 * Make sure we're not being doubly invoked.
237 if (device_find_child(parent, "acpi", 0) != NULL)
240 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
241 /* initialise the ACPI mutex */
242 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
246 * Start up the ACPI CA subsystem.
249 debugpoint = getenv("debug.acpi.debugger");
251 if (!strcmp(debugpoint, "init"))
252 acpi_EnterDebugger();
256 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) {
257 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error));
261 debugpoint = getenv("debug.acpi.debugger");
263 if (!strcmp(debugpoint, "tables"))
264 acpi_EnterDebugger();
269 if (ACPI_FAILURE(error = AcpiLoadTables())) {
270 printf("ACPI: table load failed: %s\n", AcpiFormatException(error));
275 * Attach the actual ACPI device.
277 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) {
278 device_printf(parent, "ACPI: could not attach\n");
284 * Fetch some descriptive data from ACPI to put in our attach message
287 acpi_probe(device_t dev)
289 ACPI_TABLE_HEADER th;
295 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
297 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
298 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
299 device_printf(dev, "Other PM system enabled.\n");
305 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) {
306 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status));
309 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId);
310 device_set_desc_copy(dev, buf);
318 acpi_attach(device_t dev)
320 struct acpi_softc *sc;
330 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
332 sc = device_get_softc(dev);
333 bzero(sc, sizeof(*sc));
335 callout_init(&sc->acpi_sleep_timer);
338 debugpoint = getenv("debug.acpi.debugger");
340 if (!strcmp(debugpoint, "spaces"))
341 acpi_EnterDebugger();
347 * Install the default address space handlers.
350 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
351 ACPI_ADR_SPACE_SYSTEM_MEMORY,
352 ACPI_DEFAULT_HANDLER,
354 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status));
357 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
358 ACPI_ADR_SPACE_SYSTEM_IO,
359 ACPI_DEFAULT_HANDLER,
361 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status));
364 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
365 ACPI_ADR_SPACE_PCI_CONFIG,
366 ACPI_DEFAULT_HANDLER,
368 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status));
373 * Bring ACPI fully online.
375 * Note that some systems (specifically, those with namespace evaluation issues
376 * that require the avoidance of parts of the namespace) must avoid running _INI
377 * and _STA on everything, as well as dodging the final object init pass.
379 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
381 * XXX We should arrange for the object init pass after we have attached all our
382 * child devices, but on many systems it works here.
385 debugpoint = getenv("debug.acpi.debugger");
387 if (!strcmp(debugpoint, "enable"))
388 acpi_EnterDebugger();
393 if (testenv("debug.acpi.avoid"))
394 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
395 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
396 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status));
400 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
401 device_printf(dev, "could not initialize ACPI objects: %s\n", AcpiFormatException(status));
406 * Setup our sysctl tree.
408 * XXX: This doesn't check to make sure that none of these fail.
410 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
411 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
412 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
413 device_get_name(dev), CTLFLAG_RD, 0, "");
414 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
415 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
416 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
417 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
418 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
419 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
420 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
421 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
422 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
423 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
424 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
425 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
426 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
427 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
428 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
429 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
430 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
431 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
432 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
433 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW,
434 &sc->acpi_sleep_delay, 0, "sleep delay");
435 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
436 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW,
437 &sc->acpi_s4bios, 0, "S4BIOS mode");
438 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
439 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW,
440 &sc->acpi_verbose, 0, "verbose mode");
441 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
442 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW,
443 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff");
444 sc->acpi_disable_on_poweroff = 1;
445 sc->acpi_sleep_delay = 0;
448 sc->acpi_verbose = 1;
449 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) {
450 sc->acpi_verbose = 1;
455 * Dispatch the default sleep state to devices.
456 * TBD: should be configured from userland policy manager.
458 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX;
459 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX;
460 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX;
461 sc->acpi_standby_sx = ACPI_STATE_S1;
462 sc->acpi_suspend_sx = ACPI_STATE_S3;
464 acpi_enable_fixed_events(sc);
467 * Scan the namespace and attach/initialise children.
470 debugpoint = getenv("debug.acpi.debugger");
472 if (!strcmp(debugpoint, "probe"))
473 acpi_EnterDebugger();
479 * Register our shutdown handlers
481 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST);
482 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST);
485 * Register our acpi event handlers.
486 * XXX should be configurable eg. via userland policy manager.
488 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST);
489 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST);
492 * Flag our initial states.
494 sc->acpi_enabled = 1;
495 sc->acpi_sstate = ACPI_STATE_S0;
496 sc->acpi_sleep_disabled = 0;
499 * Create the control device
501 cdevsw_add(&acpi_cdevsw, 0, 0);
502 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
504 sc->acpi_dev_t->si_drv1 = sc;
507 debugpoint = getenv("debug.acpi.debugger");
509 if (!strcmp(debugpoint, "running"))
510 acpi_EnterDebugger();
515 #ifdef ACPI_USE_THREADS
516 if ((error = acpi_task_thread_init())) {
521 if ((error = acpi_machdep_init(dev))) {
525 /* Register ACPI again to pass the correct argument of pm_func. */
526 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
528 if (!acpi_disabled("bus"))
529 acpi_probe_children(dev);
539 * Handle a new device being added
542 acpi_add_child(device_t bus, int order, const char *name, int unit)
544 struct acpi_device *ad;
547 ad = malloc(sizeof(*ad), M_ACPIDEV, M_INTWAIT | M_ZERO);
549 resource_list_init(&ad->ad_rl);
551 child = device_add_child_ordered(bus, order, name, unit);
553 device_set_ivars(child, ad);
558 acpi_print_child(device_t bus, device_t child)
560 struct acpi_device *adev = device_get_ivars(child);
561 struct resource_list *rl = &adev->ad_rl;
564 retval += bus_print_child_header(bus, child);
565 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
566 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
567 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
568 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
569 retval += bus_print_child_footer(bus, child);
576 * Handle per-device ivars
579 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
581 struct acpi_device *ad;
583 if ((ad = device_get_ivars(child)) == NULL) {
584 printf("device has no ivars\n");
590 case ACPI_IVAR_HANDLE:
591 *(ACPI_HANDLE *)result = ad->ad_handle;
593 case ACPI_IVAR_MAGIC:
594 *(int *)result = ad->ad_magic;
596 case ACPI_IVAR_PRIVATE:
597 *(void **)result = ad->ad_private;
600 /* ISA compatibility */
601 case ISA_IVAR_VENDORID:
602 case ISA_IVAR_SERIAL:
603 case ISA_IVAR_COMPATID:
607 case ISA_IVAR_LOGICALID:
608 *(int *)result = acpi_isa_get_logicalid(child);
618 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
620 struct acpi_device *ad;
622 if ((ad = device_get_ivars(child)) == NULL) {
623 printf("device has no ivars\n");
629 case ACPI_IVAR_HANDLE:
630 ad->ad_handle = (ACPI_HANDLE)value;
632 case ACPI_IVAR_MAGIC:
633 ad->ad_magic = (int )value;
635 case ACPI_IVAR_PRIVATE:
636 ad->ad_private = (void *)value;
640 panic("bad ivar write request (%d)", index);
647 * Handle child resource allocation/removal
650 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count)
652 struct acpi_device *ad = device_get_ivars(child);
653 struct resource_list *rl = &ad->ad_rl;
655 resource_list_add(rl, type, rid, start, start + count -1, count);
661 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
663 struct acpi_device *ad = device_get_ivars(child);
664 struct resource_list *rl = &ad->ad_rl;
665 struct resource_list_entry *rle;
667 rle = resource_list_find(rl, type, rid);
672 *startp = rle->start;
674 *countp = rle->count;
679 static struct resource *
680 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
681 u_long start, u_long end, u_long count, u_int flags)
683 struct acpi_device *ad = device_get_ivars(child);
684 struct resource_list *rl = &ad->ad_rl;
686 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags));
690 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r)
692 struct acpi_device *ad = device_get_ivars(child);
693 struct resource_list *rl = &ad->ad_rl;
695 return(resource_list_release(rl, bus, child, type, rid, r));
699 * Handle ISA-like devices probing for a PnP ID to match.
701 #define PNP_EISAID(s) \
702 ((((s[0] - '@') & 0x1f) << 2) \
703 | (((s[1] - '@') & 0x18) >> 3) \
704 | (((s[1] - '@') & 0x07) << 13) \
705 | (((s[2] - '@') & 0x1f) << 8) \
706 | (PNP_HEXTONUM(s[4]) << 16) \
707 | (PNP_HEXTONUM(s[3]) << 20) \
708 | (PNP_HEXTONUM(s[6]) << 24) \
709 | (PNP_HEXTONUM(s[5]) << 28))
712 acpi_isa_get_logicalid(device_t dev)
715 ACPI_DEVICE_INFO devinfo;
720 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
725 /* fetch and validate the HID */
726 if ((h = acpi_get_handle(dev)) == NULL)
728 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
730 if (!(devinfo.Valid & ACPI_VALID_HID))
733 pnpid = PNP_EISAID(devinfo.HardwareId);
740 acpi_isa_get_compatid(device_t dev)
743 ACPI_DEVICE_INFO devinfo;
748 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
753 /* fetch and validate the HID */
754 if ((h = acpi_get_handle(dev)) == NULL)
756 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
758 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &pnpid)))
768 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
773 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
776 * ISA-style drivers attached to ACPI may persist and
777 * probe manually if we return ENOENT. We never want
778 * that to happen, so don't ever return it.
782 /* scan the supplied IDs for a match */
783 lid = acpi_isa_get_logicalid(child);
784 cid = acpi_isa_get_compatid(child);
785 while (ids && ids->ip_id) {
786 if (lid == ids->ip_id || cid == ids->ip_id) {
793 return_VALUE(result);
797 * Scan relevant portions of the ACPI namespace and attach child devices.
799 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes,
800 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec.
803 acpi_probe_children(device_t bus)
806 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL};
809 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
813 * Create any static children by calling device identify methods.
815 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
816 bus_generic_probe(bus);
819 * Scan the namespace and insert placeholders for all the devices that
822 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
823 * we want to create nodes for all devices, not just those that are currently
824 * present. (This assumes that we don't want to create/remove devices as they
825 * appear, which might be smarter.)
827 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
828 for (i = 0; scopes[i] != NULL; i++)
829 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)))
830 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL);
833 * Scan all of the child devices we have created and let them probe/attach.
835 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
836 bus_generic_attach(bus);
839 * Some of these children may have attached others as part of their attach
840 * process (eg. the root PCI bus driver), so rescan.
842 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
843 bus_generic_attach(bus);
845 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
850 * Evaluate a child device and determine whether we might attach a device to
854 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
856 ACPI_OBJECT_TYPE type;
857 device_t child, bus = (device_t)context;
859 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
862 * Skip this device if we think we'll have trouble with it.
864 if (acpi_avoid(handle))
865 return_ACPI_STATUS(AE_OK);
867 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
869 case ACPI_TYPE_DEVICE:
870 case ACPI_TYPE_PROCESSOR:
871 case ACPI_TYPE_THERMAL:
872 case ACPI_TYPE_POWER:
873 if (acpi_disabled("children"))
876 * Create a placeholder device for this node. Sort the placeholder
877 * so that the probe/attach passes will run breadth-first.
879 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle)));
880 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1);
883 acpi_set_handle(child, handle);
886 * Check that the device is present. If it's not present,
887 * leave it disabled (so that we have a device_t attached to
888 * the handle, but we don't probe it).
890 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) {
891 device_disable(child);
896 * Get the device's resource settings and attach them.
897 * Note that if the device has _PRS but no _CRS, we need
898 * to decide when it's appropriate to try to configure the
899 * device. Ignore the return value here; it's OK for the
900 * device not to have any resources.
902 acpi_parse_resources(child, handle, &acpi_res_parse_set);
904 /* if we're debugging, probe/attach now rather than later */
905 ACPI_DEBUG_EXEC(device_probe_and_attach(child));
909 return_ACPI_STATUS(AE_OK);
913 acpi_shutdown_pre_sync(void *arg, int howto)
916 struct acpi_softc *sc = arg;
921 * Disable all ACPI events before soft off, otherwise the system
922 * will be turned on again on some laptops.
924 * XXX this should probably be restricted to masking some events just
925 * before powering down, since we may still need ACPI during the
928 if (sc->acpi_disable_on_poweroff)
933 acpi_shutdown_final(void *arg, int howto)
939 if (howto & RB_POWEROFF) {
940 printf("Power system off using ACPI...\n");
941 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(acpi_off_state))) {
942 printf("AcpiEnterSleepStatePrep failed - %s\n",
943 AcpiFormatException(status));
946 if (ACPI_FAILURE(status = AcpiEnterSleepState(acpi_off_state))) {
947 printf("ACPI power-off failed - %s\n", AcpiFormatException(status));
950 printf("ACPI power-off failed - timeout\n");
953 printf("Terminate ACPI\n");
959 acpi_enable_fixed_events(struct acpi_softc *sc)
961 static int first_time = 1;
962 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n"
966 /* Enable and clear fixed events and install handlers. */
967 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) {
968 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED, 0);
969 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED);
970 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
971 acpi_eventhandler_power_button_for_sleep, sc);
973 device_printf(sc->acpi_dev, MSGFORMAT, "power");
976 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) {
977 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED, 0);
978 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED);
979 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
980 acpi_eventhandler_sleep_button_for_sleep, sc);
982 device_printf(sc->acpi_dev, MSGFORMAT, "sleep");
990 * Returns true if the device is actually present and should
991 * be attached to. This requires the present, enabled, UI-visible
992 * and diagnostics-passed bits to be set.
995 acpi_DeviceIsPresent(device_t dev)
998 ACPI_DEVICE_INFO devinfo;
1003 if ((h = acpi_get_handle(dev)) == NULL)
1005 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1007 /* if no _STA method, must be present */
1008 if (!(devinfo.Valid & ACPI_VALID_STA))
1010 /* return true for 'present' and 'functioning' */
1011 if ((devinfo.CurrentStatus & 0x9) == 0x9)
1017 * Returns true if the battery is actually present and inserted.
1020 acpi_BatteryIsPresent(device_t dev)
1023 ACPI_DEVICE_INFO devinfo;
1028 if ((h = acpi_get_handle(dev)) == NULL)
1030 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1032 /* if no _STA method, must be present */
1033 if (!(devinfo.Valid & ACPI_VALID_STA))
1035 /* return true for 'present' and 'functioning' */
1036 if ((devinfo.CurrentStatus & 0x19) == 0x19)
1042 * Match a HID string against a device
1045 acpi_MatchHid(device_t dev, char *hid)
1048 ACPI_DEVICE_INFO devinfo;
1056 if ((h = acpi_get_handle(dev)) == NULL)
1058 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1060 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId))
1062 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid)))
1064 if (cid == PNP_EISAID(hid))
1070 * Return the handle of a named object within our scope, ie. that of (parent)
1071 * or one if its parents.
1074 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1081 /* walk back up the tree to the root */
1083 if (ACPI_SUCCESS(status = AcpiGetHandle(parent, path, &r))) {
1087 if (status != AE_NOT_FOUND)
1089 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1090 return(AE_NOT_FOUND);
1096 * Allocate a buffer with a preset data size.
1099 acpi_AllocBuffer(int size)
1103 buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_INTWAIT);
1105 buf->Pointer = (void *)(buf + 1);
1110 * Evaluate a path that should return an integer.
1113 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number)
1122 handle = ACPI_ROOT_OBJECT;
1125 * Assume that what we've been pointed at is an Integer object, or
1126 * a method that will return an Integer.
1128 buf.Pointer = ¶m;
1129 buf.Length = sizeof(param);
1130 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) {
1131 if (param.Type == ACPI_TYPE_INTEGER) {
1132 *number = param.Integer.Value;
1139 * In some applications, a method that's expected to return an Integer
1140 * may instead return a Buffer (probably to simplify some internal
1141 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1142 * convert it into an Integer as best we can.
1146 if (error == AE_BUFFER_OVERFLOW) {
1147 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1148 error = AE_NO_MEMORY;
1150 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) {
1151 error = acpi_ConvertBufferToInteger(&buf, number);
1154 AcpiOsFree(buf.Pointer);
1160 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number)
1165 p = (ACPI_OBJECT *)bufp->Pointer;
1166 if (p->Type == ACPI_TYPE_INTEGER) {
1167 *number = p->Integer.Value;
1170 if (p->Type != ACPI_TYPE_BUFFER)
1172 if (p->Buffer.Length > sizeof(int))
1173 return(AE_BAD_DATA);
1175 for (i = 0; i < p->Buffer.Length; i++)
1176 *number += (*(p->Buffer.Pointer + i) << (i * 8));
1181 * Iterate over the elements of an a package object, calling the supplied
1182 * function for each element.
1184 * XXX possible enhancement might be to abort traversal on error.
1187 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg)
1192 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE))
1193 return(AE_BAD_PARAMETER);
1195 /* iterate over components */
1196 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++)
1203 * Find the (index)th resource object in a set.
1206 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
1211 rp = (ACPI_RESOURCE *)buf->Pointer;
1215 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1216 return(AE_BAD_PARAMETER);
1217 /* check for terminator */
1218 if ((rp->Id == ACPI_RSTYPE_END_TAG) ||
1220 return(AE_NOT_FOUND);
1221 rp = ACPI_RESOURCE_NEXT(rp);
1229 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
1231 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
1232 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
1233 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
1236 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
1239 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
1245 * Initialise the buffer if necessary.
1247 if (buf->Pointer == NULL) {
1248 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
1249 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
1250 return(AE_NO_MEMORY);
1251 rp = (ACPI_RESOURCE *)buf->Pointer;
1252 rp->Id = ACPI_RSTYPE_END_TAG;
1259 * Scan the current buffer looking for the terminator.
1260 * This will either find the terminator or hit the end
1261 * of the buffer and return an error.
1263 rp = (ACPI_RESOURCE *)buf->Pointer;
1265 /* range check, don't go outside the buffer */
1266 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1267 return(AE_BAD_PARAMETER);
1268 if ((rp->Id == ACPI_RSTYPE_END_TAG) ||
1269 (rp->Length == 0)) {
1272 rp = ACPI_RESOURCE_NEXT(rp);
1276 * Check the size of the buffer and expand if required.
1279 * size of existing resources before terminator +
1280 * size of new resource and header +
1281 * size of terminator.
1283 * Note that this loop should really only run once, unless
1284 * for some reason we are stuffing a *really* huge resource.
1286 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
1287 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA +
1288 ACPI_RESOURCE_LENGTH) >= buf->Length) {
1289 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
1290 return(AE_NO_MEMORY);
1291 bcopy(buf->Pointer, newp, buf->Length);
1292 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
1293 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
1294 AcpiOsFree(buf->Pointer);
1295 buf->Pointer = newp;
1296 buf->Length += buf->Length;
1300 * Insert the new resource.
1302 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA);
1305 * And add the terminator.
1307 rp = ACPI_RESOURCE_NEXT(rp);
1308 rp->Id = ACPI_RSTYPE_END_TAG;
1315 * Set interrupt model.
1318 acpi_SetIntrModel(int model)
1320 ACPI_OBJECT_LIST ArgList;
1323 Arg.Type = ACPI_TYPE_INTEGER;
1324 Arg.Integer.Value = model;
1326 ArgList.Pointer = &Arg;
1327 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL));
1330 #define ACPI_MINIMUM_AWAKETIME 5
1333 acpi_sleep_enable(void *arg)
1335 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
1339 * Set the system sleep state
1341 * Currently we only support S1 and S5
1344 acpi_SetSleepState(struct acpi_softc *sc, int state)
1346 ACPI_STATUS status = AE_OK;
1350 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1353 if (sc->acpi_sstate != ACPI_STATE_S0)
1354 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */
1356 if (sc->acpi_sleep_disabled)
1357 return_ACPI_STATUS(AE_OK);
1360 case ACPI_STATE_S0: /* XXX only for testing */
1361 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) {
1362 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
1370 if (ACPI_FAILURE(status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) {
1371 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", AcpiFormatException(status));
1375 sc->acpi_sstate = state;
1376 sc->acpi_sleep_disabled = 1;
1379 * Inform all devices that we are going to sleep.
1381 if (DEVICE_SUSPEND(root_bus) != 0) {
1383 * Re-wake the system.
1385 * XXX note that a better two-pass approach with a 'veto' pass
1386 * followed by a "real thing" pass would be better, but the
1387 * current bus interface does not provide for this.
1389 DEVICE_RESUME(root_bus);
1390 return_ACPI_STATUS(AE_ERROR);
1393 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) {
1394 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1395 AcpiFormatException(status));
1399 if (sc->acpi_sleep_delay > 0) {
1400 DELAY(sc->acpi_sleep_delay * 1000000);
1403 if (state != ACPI_STATE_S1) {
1404 acpi_sleep_machdep(sc, state);
1406 /* AcpiEnterSleepState() maybe incompleted, unlock here if locked. */
1407 if (AcpiGbl_AcpiMutexInfo[ACPI_MTX_HARDWARE].OwnerId != ACPI_MUTEX_NOT_ACQUIRED) {
1408 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE);
1411 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
1412 if (state == ACPI_STATE_S4) {
1416 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) {
1417 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
1421 AcpiLeaveSleepState((UINT8)state);
1422 DEVICE_RESUME(root_bus);
1423 sc->acpi_sstate = ACPI_STATE_S0;
1424 acpi_enable_fixed_events(sc);
1429 * Shut down cleanly and power off. This will call us back through the
1430 * shutdown handlers.
1432 shutdown_nice(RB_POWEROFF);
1436 status = AE_BAD_PARAMETER;
1440 if (sc->acpi_sleep_disabled)
1441 callout_reset(&sc->acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME,
1442 acpi_sleep_enable, sc);
1444 return_ACPI_STATUS(status);
1448 * Enable/Disable ACPI
1451 acpi_Enable(struct acpi_softc *sc)
1456 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1459 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT |
1460 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
1461 if (!sc->acpi_enabled) {
1462 status = AcpiEnableSubsystem(flags);
1466 if (status == AE_OK)
1467 sc->acpi_enabled = 1;
1468 return_ACPI_STATUS(status);
1472 acpi_Disable(struct acpi_softc *sc)
1476 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1479 if (sc->acpi_enabled) {
1480 status = AcpiDisable();
1484 if (status == AE_OK)
1485 sc->acpi_enabled = 0;
1486 return_ACPI_STATUS(status);
1490 * ACPI Event Handlers
1493 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
1496 acpi_system_eventhandler_sleep(void *arg, int state)
1499 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1502 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
1503 acpi_SetSleepState((struct acpi_softc *)arg, state);
1509 acpi_system_eventhandler_wakeup(void *arg, int state)
1512 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1514 /* Well, what to do? :-) */
1523 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
1526 acpi_eventhandler_power_button_for_sleep(void *context)
1528 struct acpi_softc *sc = (struct acpi_softc *)context;
1530 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1532 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
1534 return_VALUE(ACPI_INTERRUPT_HANDLED);
1538 acpi_eventhandler_power_button_for_wakeup(void *context)
1540 struct acpi_softc *sc = (struct acpi_softc *)context;
1542 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1544 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
1546 return_VALUE(ACPI_INTERRUPT_HANDLED);
1550 acpi_eventhandler_sleep_button_for_sleep(void *context)
1552 struct acpi_softc *sc = (struct acpi_softc *)context;
1554 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1556 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
1558 return_VALUE(ACPI_INTERRUPT_HANDLED);
1562 acpi_eventhandler_sleep_button_for_wakeup(void *context)
1564 struct acpi_softc *sc = (struct acpi_softc *)context;
1566 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1568 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
1570 return_VALUE(ACPI_INTERRUPT_HANDLED);
1574 * XXX This is kinda ugly, and should not be here.
1576 struct acpi_staticbuf {
1582 acpi_name(ACPI_HANDLE handle)
1584 static struct acpi_staticbuf buf;
1588 buf.buffer.Length = 512;
1589 buf.buffer.Pointer = &buf.data[0];
1591 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer)))
1592 return(buf.buffer.Pointer);
1593 return("(unknown path)");
1597 * Debugging/bug-avoidance. Avoid trying to fetch info on various
1598 * parts of the namespace.
1601 acpi_avoid(ACPI_HANDLE handle)
1603 char *cp, *env, *np;
1606 np = acpi_name(handle);
1609 if ((env = getenv("debug.acpi.avoid")) == NULL)
1612 /* scan the avoid list checking for a match */
1615 while ((*cp != 0) && isspace(*cp))
1620 while ((cp[len] != 0) && !isspace(cp[len]))
1622 if (!strncmp(cp, np, len)) {
1633 * Debugging/bug-avoidance. Disable ACPI subsystem components.
1636 acpi_disabled(char *subsys)
1641 if ((env = getenv("debug.acpi.disable")) == NULL)
1643 if (!strcmp(env, "all")) {
1648 /* scan the disable list checking for a match */
1651 while ((*cp != 0) && isspace(*cp))
1656 while ((cp[len] != 0) && !isspace(cp[len]))
1658 if (!strncmp(cp, subsys, len)) {
1669 * Device wake capability enable/disable.
1672 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable)
1674 ACPI_OBJECT_LIST ArgList;
1678 * TBD: All Power Resources referenced by elements 2 through N
1679 * of the _PRW object are put into the ON state.
1683 * enable/disable device wake function.
1687 ArgList.Pointer = &Arg;
1689 Arg.Type = ACPI_TYPE_INTEGER;
1690 Arg.Integer.Value = enable;
1692 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL);
1696 acpi_device_enable_wake_event(ACPI_HANDLE h)
1698 struct acpi_softc *sc;
1700 ACPI_BUFFER prw_buffer;
1703 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1705 if ((sc = devclass_get_softc(acpi_devclass, 0)) == NULL) {
1710 * _PRW object is only required for devices that have the ability
1711 * to wake the system from a system sleeping state.
1713 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
1714 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
1715 if (ACPI_FAILURE(status)) {
1719 res = (ACPI_OBJECT *)prw_buffer.Pointer;
1724 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) {
1729 * The element 1 of the _PRW object:
1730 * The lowest power system sleeping state that can be entered
1731 * while still providing wake functionality.
1732 * The sleeping state being entered must be greater or equal to
1733 * the power state declared in element 1 of the _PRW object.
1735 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) {
1739 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) {
1744 * The element 0 of the _PRW object:
1746 switch(res->Package.Elements[0].Type) {
1747 case ACPI_TYPE_INTEGER:
1749 * If the data type of this package element is numeric, then this
1750 * _PRW package element is the bit index in the GPEx_EN, in the
1751 * GPE blocks described in the FADT, of the enable bit that is
1752 * enabled for the wake event.
1755 status = AcpiEnableEvent(res->Package.Elements[0].Integer.Value,
1756 ACPI_EVENT_GPE, ACPI_EVENT_WAKE_ENABLE);
1757 if (ACPI_FAILURE(status))
1758 printf("%s: EnableEvent Failed\n", __func__);
1761 case ACPI_TYPE_PACKAGE:
1765 * If the data type of this package element is a package, then this
1766 * _PRW package element is itself a package containing two
1767 * elements. The first is an object reference to the GPE Block
1768 * device that contains the GPE that will be triggered by the wake
1769 * event. The second element is numeric and it contains the bit
1770 * index in the GPEx_EN, in the GPE Block referenced by the
1771 * first element in the package, of the enable bit that is enabled for
1773 * For example, if this field is a package then it is of the form:
1774 * Package() {\_SB.PCI0.ISA.GPE, 2}
1784 if (prw_buffer.Pointer != NULL)
1785 AcpiOsFree(prw_buffer.Pointer);
1790 * Control interface.
1792 * We multiplex ioctls for all participating ACPI devices here. Individual
1793 * drivers wanting to be accessible via /dev/acpi should use the register/deregister
1794 * interface to make their handlers visible.
1796 struct acpi_ioctl_hook
1798 TAILQ_ENTRY(acpi_ioctl_hook) link;
1800 int (* fn)(u_long cmd, caddr_t addr, void *arg);
1804 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
1805 static int acpi_ioctl_hooks_initted;
1808 * Register an ioctl handler.
1811 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg)
1813 struct acpi_ioctl_hook *hp;
1815 hp = malloc(sizeof(*hp), M_ACPIDEV, M_INTWAIT);
1819 if (acpi_ioctl_hooks_initted == 0) {
1820 TAILQ_INIT(&acpi_ioctl_hooks);
1821 acpi_ioctl_hooks_initted = 1;
1823 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
1828 * Deregister an ioctl handler.
1831 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg))
1833 struct acpi_ioctl_hook *hp;
1835 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
1836 if ((hp->cmd == cmd) && (hp->fn == fn))
1840 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
1841 free(hp, M_ACPIDEV);
1846 acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td)
1852 acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td)
1858 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
1860 struct acpi_softc *sc;
1861 struct acpi_ioctl_hook *hp;
1862 int error, xerror, state;
1871 * Scan the list of registered ioctls, looking for handlers.
1873 if (acpi_ioctl_hooks_initted) {
1874 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
1875 if (hp->cmd == cmd) {
1876 xerror = hp->fn(cmd, addr, hp->arg);
1885 * Core ioctls are not permitted for non-writable user.
1886 * Currently, other ioctls just fetch information.
1887 * Not changing system behavior.
1889 if(!(flag & FWRITE)){
1894 * Core system ioctls.
1898 if (ACPI_FAILURE(acpi_Enable(sc)))
1902 case ACPIIO_DISABLE:
1903 if (ACPI_FAILURE(acpi_Disable(sc)))
1907 case ACPIIO_SETSLPSTATE:
1908 if (!sc->acpi_enabled) {
1912 state = *(int *)addr;
1913 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) {
1914 acpi_SetSleepState(sc, state);
1932 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
1934 char sleep_state[4];
1937 UINT8 state, TypeA, TypeB;
1940 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) {
1941 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
1942 sprintf(sleep_state, "S%d ", state);
1943 strcat(buf, sleep_state);
1946 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
1951 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
1953 char sleep_state[10];
1955 u_int new_state, old_state;
1957 old_state = *(u_int *)oidp->oid_arg1;
1958 if (old_state > ACPI_S_STATES_MAX+1) {
1959 strcpy(sleep_state, "unknown");
1961 bzero(sleep_state, sizeof(sleep_state));
1962 strncpy(sleep_state, sleep_state_names[old_state],
1963 sizeof(sleep_state_names[old_state]));
1965 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
1966 if (error == 0 && req->newptr != NULL) {
1967 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) {
1968 if (strncmp(sleep_state, sleep_state_names[new_state],
1969 sizeof(sleep_state)) == 0)
1972 if (new_state <= ACPI_S_STATES_MAX+1) {
1973 if (new_state != old_state) {
1974 *(u_int *)oidp->oid_arg1 = new_state;
1985 * Support for parsing debug options from the kernel environment.
1987 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
1988 * by specifying the names of the bits in the debug.acpi.layer and
1989 * debug.acpi.level environment variables. Bits may be unset by
1990 * prefixing the bit name with !.
1998 static struct debugtag dbg_layer[] = {
1999 {"ACPI_UTILITIES", ACPI_UTILITIES},
2000 {"ACPI_HARDWARE", ACPI_HARDWARE},
2001 {"ACPI_EVENTS", ACPI_EVENTS},
2002 {"ACPI_TABLES", ACPI_TABLES},
2003 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
2004 {"ACPI_PARSER", ACPI_PARSER},
2005 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
2006 {"ACPI_EXECUTER", ACPI_EXECUTER},
2007 {"ACPI_RESOURCES", ACPI_RESOURCES},
2008 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
2009 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
2010 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
2012 {"ACPI_BUS", ACPI_BUS},
2013 {"ACPI_SYSTEM", ACPI_SYSTEM},
2014 {"ACPI_POWER", ACPI_POWER},
2015 {"ACPI_EC", ACPI_EC},
2016 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
2017 {"ACPI_BATTERY", ACPI_BATTERY},
2018 {"ACPI_BUTTON", ACPI_BUTTON},
2019 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
2020 {"ACPI_THERMAL", ACPI_THERMAL},
2021 {"ACPI_FAN", ACPI_FAN},
2023 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
2024 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
2028 static struct debugtag dbg_level[] = {
2029 {"ACPI_LV_ERROR", ACPI_LV_ERROR},
2030 {"ACPI_LV_WARN", ACPI_LV_WARN},
2031 {"ACPI_LV_INIT", ACPI_LV_INIT},
2032 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
2033 {"ACPI_LV_INFO", ACPI_LV_INFO},
2034 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
2036 /* Trace verbosity level 1 [Standard Trace Level] */
2037 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
2038 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
2039 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
2040 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
2041 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
2042 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
2043 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
2044 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
2045 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
2046 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
2047 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
2048 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
2049 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
2050 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
2051 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
2053 /* Trace verbosity level 2 [Function tracing and memory allocation] */
2054 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
2055 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
2056 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
2057 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
2058 {"ACPI_LV_ALL", ACPI_LV_ALL},
2060 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
2061 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
2062 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
2063 {"ACPI_LV_IO", ACPI_LV_IO},
2064 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
2065 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
2067 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
2068 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
2069 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
2070 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
2071 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
2072 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
2077 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
2089 while (*ep && !isspace(*ep))
2100 for (i = 0; tag[i].name != NULL; i++) {
2101 if (!strncmp(cp, tag[i].name, l)) {
2103 *flag |= tag[i].value;
2105 *flag &= ~tag[i].value;
2107 printf("ACPI_DEBUG: set '%s'\n", tag[i].name);
2115 acpi_set_debugging(void *junk)
2124 if ((cp = getenv("debug.acpi.layer")) != NULL) {
2125 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer);
2128 if ((cp = getenv("debug.acpi.level")) != NULL) {
2129 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel);
2133 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel);
2135 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL);
2139 acpi_pm_func(u_long cmd, void *arg, ...)
2141 int state, acpi_state;
2143 struct acpi_softc *sc;
2148 case POWER_CMD_SUSPEND:
2149 sc = (struct acpi_softc *)arg;
2155 __va_start(ap, arg);
2156 state = __va_arg(ap, int);
2160 case POWER_SLEEP_STATE_STANDBY:
2161 acpi_state = sc->acpi_standby_sx;
2163 case POWER_SLEEP_STATE_SUSPEND:
2164 acpi_state = sc->acpi_suspend_sx;
2166 case POWER_SLEEP_STATE_HIBERNATE:
2167 acpi_state = ACPI_STATE_S4;
2174 acpi_SetSleepState(sc, acpi_state);
2187 acpi_pm_register(void *arg)
2194 if (!resource_int_value("acpi", 0, "disabled", &error) &&
2198 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
2201 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);