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 1.6 2004/05/19 22:52:40 dillon 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));
337 debugpoint = getenv("debug.acpi.debugger");
339 if (!strcmp(debugpoint, "spaces"))
340 acpi_EnterDebugger();
346 * Install the default address space handlers.
349 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
350 ACPI_ADR_SPACE_SYSTEM_MEMORY,
351 ACPI_DEFAULT_HANDLER,
353 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status));
356 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
357 ACPI_ADR_SPACE_SYSTEM_IO,
358 ACPI_DEFAULT_HANDLER,
360 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status));
363 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
364 ACPI_ADR_SPACE_PCI_CONFIG,
365 ACPI_DEFAULT_HANDLER,
367 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status));
372 * Bring ACPI fully online.
374 * Note that some systems (specifically, those with namespace evaluation issues
375 * that require the avoidance of parts of the namespace) must avoid running _INI
376 * and _STA on everything, as well as dodging the final object init pass.
378 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
380 * XXX We should arrange for the object init pass after we have attached all our
381 * child devices, but on many systems it works here.
384 debugpoint = getenv("debug.acpi.debugger");
386 if (!strcmp(debugpoint, "enable"))
387 acpi_EnterDebugger();
392 if (testenv("debug.acpi.avoid"))
393 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
394 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
395 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status));
399 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
400 device_printf(dev, "could not initialize ACPI objects: %s\n", AcpiFormatException(status));
405 * Setup our sysctl tree.
407 * XXX: This doesn't check to make sure that none of these fail.
409 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
410 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
411 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
412 device_get_name(dev), CTLFLAG_RD, 0, "");
413 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
414 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
415 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
416 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
417 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
418 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
419 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
420 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
421 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
422 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
423 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
424 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
425 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
426 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
427 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
428 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
429 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
430 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
431 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
432 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW,
433 &sc->acpi_sleep_delay, 0, "sleep delay");
434 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
435 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW,
436 &sc->acpi_s4bios, 0, "S4BIOS mode");
437 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
438 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW,
439 &sc->acpi_verbose, 0, "verbose mode");
440 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
441 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW,
442 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff");
443 sc->acpi_disable_on_poweroff = 1;
444 sc->acpi_sleep_delay = 0;
447 sc->acpi_verbose = 1;
448 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) {
449 sc->acpi_verbose = 1;
454 * Dispatch the default sleep state to devices.
455 * TBD: should be configured from userland policy manager.
457 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX;
458 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX;
459 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX;
460 sc->acpi_standby_sx = ACPI_STATE_S1;
461 sc->acpi_suspend_sx = ACPI_STATE_S3;
463 acpi_enable_fixed_events(sc);
466 * Scan the namespace and attach/initialise children.
469 debugpoint = getenv("debug.acpi.debugger");
471 if (!strcmp(debugpoint, "probe"))
472 acpi_EnterDebugger();
478 * Register our shutdown handlers
480 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST);
481 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST);
484 * Register our acpi event handlers.
485 * XXX should be configurable eg. via userland policy manager.
487 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST);
488 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST);
491 * Flag our initial states.
493 sc->acpi_enabled = 1;
494 sc->acpi_sstate = ACPI_STATE_S0;
495 sc->acpi_sleep_disabled = 0;
498 * Create the control device
500 cdevsw_add(&acpi_cdevsw, 0, 0);
501 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
503 sc->acpi_dev_t->si_drv1 = sc;
506 debugpoint = getenv("debug.acpi.debugger");
508 if (!strcmp(debugpoint, "running"))
509 acpi_EnterDebugger();
514 #ifdef ACPI_USE_THREADS
515 if ((error = acpi_task_thread_init())) {
520 if ((error = acpi_machdep_init(dev))) {
524 /* Register ACPI again to pass the correct argument of pm_func. */
525 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
527 if (!acpi_disabled("bus"))
528 acpi_probe_children(dev);
538 * Handle a new device being added
541 acpi_add_child(device_t bus, int order, const char *name, int unit)
543 struct acpi_device *ad;
546 ad = malloc(sizeof(*ad), M_ACPIDEV, M_INTWAIT | M_ZERO);
548 resource_list_init(&ad->ad_rl);
550 child = device_add_child_ordered(bus, order, name, unit);
552 device_set_ivars(child, ad);
557 acpi_print_child(device_t bus, device_t child)
559 struct acpi_device *adev = device_get_ivars(child);
560 struct resource_list *rl = &adev->ad_rl;
563 retval += bus_print_child_header(bus, child);
564 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
565 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
566 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
567 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
568 retval += bus_print_child_footer(bus, child);
575 * Handle per-device ivars
578 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
580 struct acpi_device *ad;
582 if ((ad = device_get_ivars(child)) == NULL) {
583 printf("device has no ivars\n");
589 case ACPI_IVAR_HANDLE:
590 *(ACPI_HANDLE *)result = ad->ad_handle;
592 case ACPI_IVAR_MAGIC:
593 *(int *)result = ad->ad_magic;
595 case ACPI_IVAR_PRIVATE:
596 *(void **)result = ad->ad_private;
599 /* ISA compatibility */
600 case ISA_IVAR_VENDORID:
601 case ISA_IVAR_SERIAL:
602 case ISA_IVAR_COMPATID:
606 case ISA_IVAR_LOGICALID:
607 *(int *)result = acpi_isa_get_logicalid(child);
617 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
619 struct acpi_device *ad;
621 if ((ad = device_get_ivars(child)) == NULL) {
622 printf("device has no ivars\n");
628 case ACPI_IVAR_HANDLE:
629 ad->ad_handle = (ACPI_HANDLE)value;
631 case ACPI_IVAR_MAGIC:
632 ad->ad_magic = (int )value;
634 case ACPI_IVAR_PRIVATE:
635 ad->ad_private = (void *)value;
639 panic("bad ivar write request (%d)", index);
646 * Handle child resource allocation/removal
649 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count)
651 struct acpi_device *ad = device_get_ivars(child);
652 struct resource_list *rl = &ad->ad_rl;
654 resource_list_add(rl, type, rid, start, start + count -1, count);
660 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
662 struct acpi_device *ad = device_get_ivars(child);
663 struct resource_list *rl = &ad->ad_rl;
664 struct resource_list_entry *rle;
666 rle = resource_list_find(rl, type, rid);
671 *startp = rle->start;
673 *countp = rle->count;
678 static struct resource *
679 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
680 u_long start, u_long end, u_long count, u_int flags)
682 struct acpi_device *ad = device_get_ivars(child);
683 struct resource_list *rl = &ad->ad_rl;
685 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags));
689 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r)
691 struct acpi_device *ad = device_get_ivars(child);
692 struct resource_list *rl = &ad->ad_rl;
694 return(resource_list_release(rl, bus, child, type, rid, r));
698 * Handle ISA-like devices probing for a PnP ID to match.
700 #define PNP_EISAID(s) \
701 ((((s[0] - '@') & 0x1f) << 2) \
702 | (((s[1] - '@') & 0x18) >> 3) \
703 | (((s[1] - '@') & 0x07) << 13) \
704 | (((s[2] - '@') & 0x1f) << 8) \
705 | (PNP_HEXTONUM(s[4]) << 16) \
706 | (PNP_HEXTONUM(s[3]) << 20) \
707 | (PNP_HEXTONUM(s[6]) << 24) \
708 | (PNP_HEXTONUM(s[5]) << 28))
711 acpi_isa_get_logicalid(device_t dev)
714 ACPI_DEVICE_INFO devinfo;
719 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
724 /* fetch and validate the HID */
725 if ((h = acpi_get_handle(dev)) == NULL)
727 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
729 if (!(devinfo.Valid & ACPI_VALID_HID))
732 pnpid = PNP_EISAID(devinfo.HardwareId);
739 acpi_isa_get_compatid(device_t dev)
742 ACPI_DEVICE_INFO devinfo;
747 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
752 /* fetch and validate the HID */
753 if ((h = acpi_get_handle(dev)) == NULL)
755 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
757 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &pnpid)))
767 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
772 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
775 * ISA-style drivers attached to ACPI may persist and
776 * probe manually if we return ENOENT. We never want
777 * that to happen, so don't ever return it.
781 /* scan the supplied IDs for a match */
782 lid = acpi_isa_get_logicalid(child);
783 cid = acpi_isa_get_compatid(child);
784 while (ids && ids->ip_id) {
785 if (lid == ids->ip_id || cid == ids->ip_id) {
792 return_VALUE(result);
796 * Scan relevant portions of the ACPI namespace and attach child devices.
798 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes,
799 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec.
802 acpi_probe_children(device_t bus)
805 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL};
808 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
812 * Create any static children by calling device identify methods.
814 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
815 bus_generic_probe(bus);
818 * Scan the namespace and insert placeholders for all the devices that
821 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
822 * we want to create nodes for all devices, not just those that are currently
823 * present. (This assumes that we don't want to create/remove devices as they
824 * appear, which might be smarter.)
826 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
827 for (i = 0; scopes[i] != NULL; i++)
828 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)))
829 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL);
832 * Scan all of the child devices we have created and let them probe/attach.
834 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
835 bus_generic_attach(bus);
838 * Some of these children may have attached others as part of their attach
839 * process (eg. the root PCI bus driver), so rescan.
841 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
842 bus_generic_attach(bus);
844 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
849 * Evaluate a child device and determine whether we might attach a device to
853 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
855 ACPI_OBJECT_TYPE type;
856 device_t child, bus = (device_t)context;
858 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
861 * Skip this device if we think we'll have trouble with it.
863 if (acpi_avoid(handle))
864 return_ACPI_STATUS(AE_OK);
866 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
868 case ACPI_TYPE_DEVICE:
869 case ACPI_TYPE_PROCESSOR:
870 case ACPI_TYPE_THERMAL:
871 case ACPI_TYPE_POWER:
872 if (acpi_disabled("children"))
875 * Create a placeholder device for this node. Sort the placeholder
876 * so that the probe/attach passes will run breadth-first.
878 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle)));
879 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1);
882 acpi_set_handle(child, handle);
885 * Check that the device is present. If it's not present,
886 * leave it disabled (so that we have a device_t attached to
887 * the handle, but we don't probe it).
889 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) {
890 device_disable(child);
895 * Get the device's resource settings and attach them.
896 * Note that if the device has _PRS but no _CRS, we need
897 * to decide when it's appropriate to try to configure the
898 * device. Ignore the return value here; it's OK for the
899 * device not to have any resources.
901 acpi_parse_resources(child, handle, &acpi_res_parse_set);
903 /* if we're debugging, probe/attach now rather than later */
904 ACPI_DEBUG_EXEC(device_probe_and_attach(child));
908 return_ACPI_STATUS(AE_OK);
912 acpi_shutdown_pre_sync(void *arg, int howto)
915 struct acpi_softc *sc = arg;
920 * Disable all ACPI events before soft off, otherwise the system
921 * will be turned on again on some laptops.
923 * XXX this should probably be restricted to masking some events just
924 * before powering down, since we may still need ACPI during the
927 if (sc->acpi_disable_on_poweroff)
932 acpi_shutdown_final(void *arg, int howto)
938 if (howto & RB_POWEROFF) {
939 printf("Power system off using ACPI...\n");
940 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(acpi_off_state))) {
941 printf("AcpiEnterSleepStatePrep failed - %s\n",
942 AcpiFormatException(status));
945 if (ACPI_FAILURE(status = AcpiEnterSleepState(acpi_off_state))) {
946 printf("ACPI power-off failed - %s\n", AcpiFormatException(status));
949 printf("ACPI power-off failed - timeout\n");
952 printf("Terminate ACPI\n");
958 acpi_enable_fixed_events(struct acpi_softc *sc)
960 static int first_time = 1;
961 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n"
965 /* Enable and clear fixed events and install handlers. */
966 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) {
967 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED, 0);
968 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED);
969 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
970 acpi_eventhandler_power_button_for_sleep, sc);
972 device_printf(sc->acpi_dev, MSGFORMAT, "power");
975 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) {
976 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED, 0);
977 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED);
978 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
979 acpi_eventhandler_sleep_button_for_sleep, sc);
981 device_printf(sc->acpi_dev, MSGFORMAT, "sleep");
989 * Returns true if the device is actually present and should
990 * be attached to. This requires the present, enabled, UI-visible
991 * and diagnostics-passed bits to be set.
994 acpi_DeviceIsPresent(device_t dev)
997 ACPI_DEVICE_INFO devinfo;
1002 if ((h = acpi_get_handle(dev)) == NULL)
1004 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1006 /* if no _STA method, must be present */
1007 if (!(devinfo.Valid & ACPI_VALID_STA))
1009 /* return true for 'present' and 'functioning' */
1010 if ((devinfo.CurrentStatus & 0x9) == 0x9)
1016 * Returns true if the battery is actually present and inserted.
1019 acpi_BatteryIsPresent(device_t dev)
1022 ACPI_DEVICE_INFO devinfo;
1027 if ((h = acpi_get_handle(dev)) == NULL)
1029 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1031 /* if no _STA method, must be present */
1032 if (!(devinfo.Valid & ACPI_VALID_STA))
1034 /* return true for 'present' and 'functioning' */
1035 if ((devinfo.CurrentStatus & 0x19) == 0x19)
1041 * Match a HID string against a device
1044 acpi_MatchHid(device_t dev, char *hid)
1047 ACPI_DEVICE_INFO devinfo;
1055 if ((h = acpi_get_handle(dev)) == NULL)
1057 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo)))
1059 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId))
1061 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid)))
1063 if (cid == PNP_EISAID(hid))
1069 * Return the handle of a named object within our scope, ie. that of (parent)
1070 * or one if its parents.
1073 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1080 /* walk back up the tree to the root */
1082 if (ACPI_SUCCESS(status = AcpiGetHandle(parent, path, &r))) {
1086 if (status != AE_NOT_FOUND)
1088 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1089 return(AE_NOT_FOUND);
1095 * Allocate a buffer with a preset data size.
1098 acpi_AllocBuffer(int size)
1102 buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_INTWAIT);
1104 buf->Pointer = (void *)(buf + 1);
1109 * Evaluate a path that should return an integer.
1112 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number)
1121 handle = ACPI_ROOT_OBJECT;
1124 * Assume that what we've been pointed at is an Integer object, or
1125 * a method that will return an Integer.
1127 buf.Pointer = ¶m;
1128 buf.Length = sizeof(param);
1129 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) {
1130 if (param.Type == ACPI_TYPE_INTEGER) {
1131 *number = param.Integer.Value;
1138 * In some applications, a method that's expected to return an Integer
1139 * may instead return a Buffer (probably to simplify some internal
1140 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1141 * convert it into an Integer as best we can.
1145 if (error == AE_BUFFER_OVERFLOW) {
1146 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1147 error = AE_NO_MEMORY;
1149 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) {
1150 error = acpi_ConvertBufferToInteger(&buf, number);
1153 AcpiOsFree(buf.Pointer);
1159 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number)
1164 p = (ACPI_OBJECT *)bufp->Pointer;
1165 if (p->Type == ACPI_TYPE_INTEGER) {
1166 *number = p->Integer.Value;
1169 if (p->Type != ACPI_TYPE_BUFFER)
1171 if (p->Buffer.Length > sizeof(int))
1172 return(AE_BAD_DATA);
1174 for (i = 0; i < p->Buffer.Length; i++)
1175 *number += (*(p->Buffer.Pointer + i) << (i * 8));
1180 * Iterate over the elements of an a package object, calling the supplied
1181 * function for each element.
1183 * XXX possible enhancement might be to abort traversal on error.
1186 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg)
1191 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE))
1192 return(AE_BAD_PARAMETER);
1194 /* iterate over components */
1195 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++)
1202 * Find the (index)th resource object in a set.
1205 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
1210 rp = (ACPI_RESOURCE *)buf->Pointer;
1214 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1215 return(AE_BAD_PARAMETER);
1216 /* check for terminator */
1217 if ((rp->Id == ACPI_RSTYPE_END_TAG) ||
1219 return(AE_NOT_FOUND);
1220 rp = ACPI_RESOURCE_NEXT(rp);
1228 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
1230 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
1231 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
1232 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
1235 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
1238 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
1244 * Initialise the buffer if necessary.
1246 if (buf->Pointer == NULL) {
1247 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
1248 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
1249 return(AE_NO_MEMORY);
1250 rp = (ACPI_RESOURCE *)buf->Pointer;
1251 rp->Id = ACPI_RSTYPE_END_TAG;
1258 * Scan the current buffer looking for the terminator.
1259 * This will either find the terminator or hit the end
1260 * of the buffer and return an error.
1262 rp = (ACPI_RESOURCE *)buf->Pointer;
1264 /* range check, don't go outside the buffer */
1265 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1266 return(AE_BAD_PARAMETER);
1267 if ((rp->Id == ACPI_RSTYPE_END_TAG) ||
1268 (rp->Length == 0)) {
1271 rp = ACPI_RESOURCE_NEXT(rp);
1275 * Check the size of the buffer and expand if required.
1278 * size of existing resources before terminator +
1279 * size of new resource and header +
1280 * size of terminator.
1282 * Note that this loop should really only run once, unless
1283 * for some reason we are stuffing a *really* huge resource.
1285 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
1286 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA +
1287 ACPI_RESOURCE_LENGTH) >= buf->Length) {
1288 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
1289 return(AE_NO_MEMORY);
1290 bcopy(buf->Pointer, newp, buf->Length);
1291 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
1292 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
1293 AcpiOsFree(buf->Pointer);
1294 buf->Pointer = newp;
1295 buf->Length += buf->Length;
1299 * Insert the new resource.
1301 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA);
1304 * And add the terminator.
1306 rp = ACPI_RESOURCE_NEXT(rp);
1307 rp->Id = ACPI_RSTYPE_END_TAG;
1314 * Set interrupt model.
1317 acpi_SetIntrModel(int model)
1319 ACPI_OBJECT_LIST ArgList;
1322 Arg.Type = ACPI_TYPE_INTEGER;
1323 Arg.Integer.Value = model;
1325 ArgList.Pointer = &Arg;
1326 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL));
1329 #define ACPI_MINIMUM_AWAKETIME 5
1332 acpi_sleep_enable(void *arg)
1334 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
1338 * Set the system sleep state
1340 * Currently we only support S1 and S5
1343 acpi_SetSleepState(struct acpi_softc *sc, int state)
1345 ACPI_STATUS status = AE_OK;
1349 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1352 if (sc->acpi_sstate != ACPI_STATE_S0)
1353 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */
1355 if (sc->acpi_sleep_disabled)
1356 return_ACPI_STATUS(AE_OK);
1359 case ACPI_STATE_S0: /* XXX only for testing */
1360 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) {
1361 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
1369 if (ACPI_FAILURE(status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) {
1370 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", AcpiFormatException(status));
1374 sc->acpi_sstate = state;
1375 sc->acpi_sleep_disabled = 1;
1378 * Inform all devices that we are going to sleep.
1380 if (DEVICE_SUSPEND(root_bus) != 0) {
1382 * Re-wake the system.
1384 * XXX note that a better two-pass approach with a 'veto' pass
1385 * followed by a "real thing" pass would be better, but the
1386 * current bus interface does not provide for this.
1388 DEVICE_RESUME(root_bus);
1389 return_ACPI_STATUS(AE_ERROR);
1392 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) {
1393 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1394 AcpiFormatException(status));
1398 if (sc->acpi_sleep_delay > 0) {
1399 DELAY(sc->acpi_sleep_delay * 1000000);
1402 if (state != ACPI_STATE_S1) {
1403 acpi_sleep_machdep(sc, state);
1405 /* AcpiEnterSleepState() maybe incompleted, unlock here if locked. */
1406 if (AcpiGbl_AcpiMutexInfo[ACPI_MTX_HARDWARE].OwnerId != ACPI_MUTEX_NOT_ACQUIRED) {
1407 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE);
1410 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
1411 if (state == ACPI_STATE_S4) {
1415 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) {
1416 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
1420 AcpiLeaveSleepState((UINT8)state);
1421 DEVICE_RESUME(root_bus);
1422 sc->acpi_sstate = ACPI_STATE_S0;
1423 acpi_enable_fixed_events(sc);
1428 * Shut down cleanly and power off. This will call us back through the
1429 * shutdown handlers.
1431 shutdown_nice(RB_POWEROFF);
1435 status = AE_BAD_PARAMETER;
1439 if (sc->acpi_sleep_disabled)
1440 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME);
1442 return_ACPI_STATUS(status);
1446 * Enable/Disable ACPI
1449 acpi_Enable(struct acpi_softc *sc)
1454 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1457 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT |
1458 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
1459 if (!sc->acpi_enabled) {
1460 status = AcpiEnableSubsystem(flags);
1464 if (status == AE_OK)
1465 sc->acpi_enabled = 1;
1466 return_ACPI_STATUS(status);
1470 acpi_Disable(struct acpi_softc *sc)
1474 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1477 if (sc->acpi_enabled) {
1478 status = AcpiDisable();
1482 if (status == AE_OK)
1483 sc->acpi_enabled = 0;
1484 return_ACPI_STATUS(status);
1488 * ACPI Event Handlers
1491 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
1494 acpi_system_eventhandler_sleep(void *arg, int state)
1497 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1500 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
1501 acpi_SetSleepState((struct acpi_softc *)arg, state);
1507 acpi_system_eventhandler_wakeup(void *arg, int state)
1510 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1512 /* Well, what to do? :-) */
1521 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
1524 acpi_eventhandler_power_button_for_sleep(void *context)
1526 struct acpi_softc *sc = (struct acpi_softc *)context;
1528 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1530 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
1532 return_VALUE(ACPI_INTERRUPT_HANDLED);
1536 acpi_eventhandler_power_button_for_wakeup(void *context)
1538 struct acpi_softc *sc = (struct acpi_softc *)context;
1540 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1542 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
1544 return_VALUE(ACPI_INTERRUPT_HANDLED);
1548 acpi_eventhandler_sleep_button_for_sleep(void *context)
1550 struct acpi_softc *sc = (struct acpi_softc *)context;
1552 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1554 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
1556 return_VALUE(ACPI_INTERRUPT_HANDLED);
1560 acpi_eventhandler_sleep_button_for_wakeup(void *context)
1562 struct acpi_softc *sc = (struct acpi_softc *)context;
1564 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1566 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
1568 return_VALUE(ACPI_INTERRUPT_HANDLED);
1572 * XXX This is kinda ugly, and should not be here.
1574 struct acpi_staticbuf {
1580 acpi_name(ACPI_HANDLE handle)
1582 static struct acpi_staticbuf buf;
1586 buf.buffer.Length = 512;
1587 buf.buffer.Pointer = &buf.data[0];
1589 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer)))
1590 return(buf.buffer.Pointer);
1591 return("(unknown path)");
1595 * Debugging/bug-avoidance. Avoid trying to fetch info on various
1596 * parts of the namespace.
1599 acpi_avoid(ACPI_HANDLE handle)
1601 char *cp, *env, *np;
1604 np = acpi_name(handle);
1607 if ((env = getenv("debug.acpi.avoid")) == NULL)
1610 /* scan the avoid list checking for a match */
1613 while ((*cp != 0) && isspace(*cp))
1618 while ((cp[len] != 0) && !isspace(cp[len]))
1620 if (!strncmp(cp, np, len)) {
1631 * Debugging/bug-avoidance. Disable ACPI subsystem components.
1634 acpi_disabled(char *subsys)
1639 if ((env = getenv("debug.acpi.disable")) == NULL)
1641 if (!strcmp(env, "all")) {
1646 /* scan the disable list checking for a match */
1649 while ((*cp != 0) && isspace(*cp))
1654 while ((cp[len] != 0) && !isspace(cp[len]))
1656 if (!strncmp(cp, subsys, len)) {
1667 * Device wake capability enable/disable.
1670 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable)
1672 ACPI_OBJECT_LIST ArgList;
1676 * TBD: All Power Resources referenced by elements 2 through N
1677 * of the _PRW object are put into the ON state.
1681 * enable/disable device wake function.
1685 ArgList.Pointer = &Arg;
1687 Arg.Type = ACPI_TYPE_INTEGER;
1688 Arg.Integer.Value = enable;
1690 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL);
1694 acpi_device_enable_wake_event(ACPI_HANDLE h)
1696 struct acpi_softc *sc;
1698 ACPI_BUFFER prw_buffer;
1701 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1703 if ((sc = devclass_get_softc(acpi_devclass, 0)) == NULL) {
1708 * _PRW object is only required for devices that have the ability
1709 * to wake the system from a system sleeping state.
1711 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
1712 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
1713 if (ACPI_FAILURE(status)) {
1717 res = (ACPI_OBJECT *)prw_buffer.Pointer;
1722 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) {
1727 * The element 1 of the _PRW object:
1728 * The lowest power system sleeping state that can be entered
1729 * while still providing wake functionality.
1730 * The sleeping state being entered must be greater or equal to
1731 * the power state declared in element 1 of the _PRW object.
1733 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) {
1737 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) {
1742 * The element 0 of the _PRW object:
1744 switch(res->Package.Elements[0].Type) {
1745 case ACPI_TYPE_INTEGER:
1747 * If the data type of this package element is numeric, then this
1748 * _PRW package element is the bit index in the GPEx_EN, in the
1749 * GPE blocks described in the FADT, of the enable bit that is
1750 * enabled for the wake event.
1753 status = AcpiEnableEvent(res->Package.Elements[0].Integer.Value,
1754 ACPI_EVENT_GPE, ACPI_EVENT_WAKE_ENABLE);
1755 if (ACPI_FAILURE(status))
1756 printf("%s: EnableEvent Failed\n", __func__);
1759 case ACPI_TYPE_PACKAGE:
1763 * If the data type of this package element is a package, then this
1764 * _PRW package element is itself a package containing two
1765 * elements. The first is an object reference to the GPE Block
1766 * device that contains the GPE that will be triggered by the wake
1767 * event. The second element is numeric and it contains the bit
1768 * index in the GPEx_EN, in the GPE Block referenced by the
1769 * first element in the package, of the enable bit that is enabled for
1771 * For example, if this field is a package then it is of the form:
1772 * Package() {\_SB.PCI0.ISA.GPE, 2}
1782 if (prw_buffer.Pointer != NULL)
1783 AcpiOsFree(prw_buffer.Pointer);
1788 * Control interface.
1790 * We multiplex ioctls for all participating ACPI devices here. Individual
1791 * drivers wanting to be accessible via /dev/acpi should use the register/deregister
1792 * interface to make their handlers visible.
1794 struct acpi_ioctl_hook
1796 TAILQ_ENTRY(acpi_ioctl_hook) link;
1798 int (* fn)(u_long cmd, caddr_t addr, void *arg);
1802 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
1803 static int acpi_ioctl_hooks_initted;
1806 * Register an ioctl handler.
1809 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg)
1811 struct acpi_ioctl_hook *hp;
1813 hp = malloc(sizeof(*hp), M_ACPIDEV, M_INTWAIT);
1817 if (acpi_ioctl_hooks_initted == 0) {
1818 TAILQ_INIT(&acpi_ioctl_hooks);
1819 acpi_ioctl_hooks_initted = 1;
1821 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
1826 * Deregister an ioctl handler.
1829 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg))
1831 struct acpi_ioctl_hook *hp;
1833 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
1834 if ((hp->cmd == cmd) && (hp->fn == fn))
1838 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
1839 free(hp, M_ACPIDEV);
1844 acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td)
1850 acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td)
1856 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
1858 struct acpi_softc *sc;
1859 struct acpi_ioctl_hook *hp;
1860 int error, xerror, state;
1869 * Scan the list of registered ioctls, looking for handlers.
1871 if (acpi_ioctl_hooks_initted) {
1872 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
1873 if (hp->cmd == cmd) {
1874 xerror = hp->fn(cmd, addr, hp->arg);
1883 * Core ioctls are not permitted for non-writable user.
1884 * Currently, other ioctls just fetch information.
1885 * Not changing system behavior.
1887 if(!(flag & FWRITE)){
1892 * Core system ioctls.
1896 if (ACPI_FAILURE(acpi_Enable(sc)))
1900 case ACPIIO_DISABLE:
1901 if (ACPI_FAILURE(acpi_Disable(sc)))
1905 case ACPIIO_SETSLPSTATE:
1906 if (!sc->acpi_enabled) {
1910 state = *(int *)addr;
1911 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) {
1912 acpi_SetSleepState(sc, state);
1930 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
1932 char sleep_state[4];
1935 UINT8 state, TypeA, TypeB;
1938 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) {
1939 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
1940 sprintf(sleep_state, "S%d ", state);
1941 strcat(buf, sleep_state);
1944 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
1949 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
1951 char sleep_state[10];
1953 u_int new_state, old_state;
1955 old_state = *(u_int *)oidp->oid_arg1;
1956 if (old_state > ACPI_S_STATES_MAX+1) {
1957 strcpy(sleep_state, "unknown");
1959 bzero(sleep_state, sizeof(sleep_state));
1960 strncpy(sleep_state, sleep_state_names[old_state],
1961 sizeof(sleep_state_names[old_state]));
1963 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
1964 if (error == 0 && req->newptr != NULL) {
1965 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) {
1966 if (strncmp(sleep_state, sleep_state_names[new_state],
1967 sizeof(sleep_state)) == 0)
1970 if (new_state <= ACPI_S_STATES_MAX+1) {
1971 if (new_state != old_state) {
1972 *(u_int *)oidp->oid_arg1 = new_state;
1983 * Support for parsing debug options from the kernel environment.
1985 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
1986 * by specifying the names of the bits in the debug.acpi.layer and
1987 * debug.acpi.level environment variables. Bits may be unset by
1988 * prefixing the bit name with !.
1996 static struct debugtag dbg_layer[] = {
1997 {"ACPI_UTILITIES", ACPI_UTILITIES},
1998 {"ACPI_HARDWARE", ACPI_HARDWARE},
1999 {"ACPI_EVENTS", ACPI_EVENTS},
2000 {"ACPI_TABLES", ACPI_TABLES},
2001 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
2002 {"ACPI_PARSER", ACPI_PARSER},
2003 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
2004 {"ACPI_EXECUTER", ACPI_EXECUTER},
2005 {"ACPI_RESOURCES", ACPI_RESOURCES},
2006 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
2007 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
2008 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
2010 {"ACPI_BUS", ACPI_BUS},
2011 {"ACPI_SYSTEM", ACPI_SYSTEM},
2012 {"ACPI_POWER", ACPI_POWER},
2013 {"ACPI_EC", ACPI_EC},
2014 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
2015 {"ACPI_BATTERY", ACPI_BATTERY},
2016 {"ACPI_BUTTON", ACPI_BUTTON},
2017 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
2018 {"ACPI_THERMAL", ACPI_THERMAL},
2019 {"ACPI_FAN", ACPI_FAN},
2021 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
2022 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
2026 static struct debugtag dbg_level[] = {
2027 {"ACPI_LV_ERROR", ACPI_LV_ERROR},
2028 {"ACPI_LV_WARN", ACPI_LV_WARN},
2029 {"ACPI_LV_INIT", ACPI_LV_INIT},
2030 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
2031 {"ACPI_LV_INFO", ACPI_LV_INFO},
2032 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
2034 /* Trace verbosity level 1 [Standard Trace Level] */
2035 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
2036 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
2037 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
2038 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
2039 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
2040 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
2041 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
2042 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
2043 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
2044 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
2045 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
2046 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
2047 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
2048 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
2049 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
2051 /* Trace verbosity level 2 [Function tracing and memory allocation] */
2052 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
2053 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
2054 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
2055 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
2056 {"ACPI_LV_ALL", ACPI_LV_ALL},
2058 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
2059 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
2060 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
2061 {"ACPI_LV_IO", ACPI_LV_IO},
2062 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
2063 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
2065 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
2066 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
2067 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
2068 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
2069 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
2070 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
2075 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
2087 while (*ep && !isspace(*ep))
2098 for (i = 0; tag[i].name != NULL; i++) {
2099 if (!strncmp(cp, tag[i].name, l)) {
2101 *flag |= tag[i].value;
2103 *flag &= ~tag[i].value;
2105 printf("ACPI_DEBUG: set '%s'\n", tag[i].name);
2113 acpi_set_debugging(void *junk)
2122 if ((cp = getenv("debug.acpi.layer")) != NULL) {
2123 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer);
2126 if ((cp = getenv("debug.acpi.level")) != NULL) {
2127 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel);
2131 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel);
2133 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL);
2137 acpi_pm_func(u_long cmd, void *arg, ...)
2139 int state, acpi_state;
2141 struct acpi_softc *sc;
2146 case POWER_CMD_SUSPEND:
2147 sc = (struct acpi_softc *)arg;
2153 __va_start(ap, arg);
2154 state = __va_arg(ap, int);
2158 case POWER_SLEEP_STATE_STANDBY:
2159 acpi_state = sc->acpi_standby_sx;
2161 case POWER_SLEEP_STATE_SUSPEND:
2162 acpi_state = sc->acpi_suspend_sx;
2164 case POWER_SLEEP_STATE_HIBERNATE:
2165 acpi_state = ACPI_STATE_S4;
2172 acpi_SetSleepState(sc, acpi_state);
2185 acpi_pm_register(void *arg)
2192 if (!resource_int_value("acpi", 0, "disabled", &error) &&
2196 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
2199 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);