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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/kernel.h>
37 #include <sys/fcntl.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
42 #include <sys/ioccom.h>
43 #include <sys/reboot.h>
44 #include <sys/sysctl.h>
45 #include <sys/ctype.h>
46 #include <sys/linker.h>
47 #include <sys/power.h>
51 #include <machine/resource.h>
52 #include <machine/bus.h>
54 #include <isa/isavar.h>
55 #include <isa/pnpvar.h>
57 #include <contrib/dev/acpica/acpi.h>
58 #include <dev/acpica/acpivar.h>
59 #include <dev/acpica/acpiio.h>
60 #include <contrib/dev/acpica/achware.h>
61 #include <contrib/dev/acpica/acnamesp.h>
64 #include <dev/pci/pcivar.h>
65 #include <dev/pci/pci_private.h>
67 #include <vm/vm_param.h>
69 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
71 /* Hooks for the ACPI CA debugging infrastructure */
72 #define _COMPONENT ACPI_BUS
73 ACPI_MODULE_NAME("ACPI")
75 static d_open_t acpiopen;
76 static d_close_t acpiclose;
77 static d_ioctl_t acpiioctl;
79 static struct cdevsw acpi_cdevsw = {
80 .d_version = D_VERSION,
87 /* Global mutex for locking access to the ACPI subsystem. */
88 struct mtx acpi_mutex;
90 /* Bitmap of device quirks. */
93 static int acpi_modevent(struct module *mod, int event, void *junk);
94 static void acpi_identify(driver_t *driver, device_t parent);
95 static int acpi_probe(device_t dev);
96 static int acpi_attach(device_t dev);
97 static int acpi_suspend(device_t dev);
98 static int acpi_resume(device_t dev);
99 static int acpi_shutdown(device_t dev);
100 static device_t acpi_add_child(device_t bus, int order, const char *name,
102 static int acpi_print_child(device_t bus, device_t child);
103 static void acpi_probe_nomatch(device_t bus, device_t child);
104 static void acpi_driver_added(device_t dev, driver_t *driver);
105 static int acpi_read_ivar(device_t dev, device_t child, int index,
107 static int acpi_write_ivar(device_t dev, device_t child, int index,
109 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
110 static int acpi_sysres_alloc(device_t dev);
111 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
112 int type, int *rid, u_long start, u_long end,
113 u_long count, u_int flags);
114 static int acpi_release_resource(device_t bus, device_t child, int type,
115 int rid, struct resource *r);
116 static void acpi_delete_resource(device_t bus, device_t child, int type,
118 static uint32_t acpi_isa_get_logicalid(device_t dev);
119 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
120 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
121 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
122 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
124 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev,
126 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
127 void *context, void **retval);
128 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
129 int max_depth, acpi_scan_cb_t user_fn, void *arg);
130 static int acpi_set_powerstate_method(device_t bus, device_t child,
132 static int acpi_isa_pnp_probe(device_t bus, device_t child,
133 struct isa_pnp_id *ids);
134 static void acpi_probe_children(device_t bus);
135 static int acpi_probe_order(ACPI_HANDLE handle, int *order);
136 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
137 void *context, void **status);
138 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid);
139 static void acpi_shutdown_final(void *arg, int howto);
140 static void acpi_enable_fixed_events(struct acpi_softc *sc);
141 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
142 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
143 static int acpi_wake_prep_walk(int sstate);
144 static int acpi_wake_sysctl_walk(device_t dev);
145 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
146 static void acpi_system_eventhandler_sleep(void *arg, int state);
147 static void acpi_system_eventhandler_wakeup(void *arg, int state);
148 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
149 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
150 static int acpi_pm_func(u_long cmd, void *arg, ...);
151 static int acpi_child_location_str_method(device_t acdev, device_t child,
152 char *buf, size_t buflen);
153 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
154 char *buf, size_t buflen);
156 static device_method_t acpi_methods[] = {
157 /* Device interface */
158 DEVMETHOD(device_identify, acpi_identify),
159 DEVMETHOD(device_probe, acpi_probe),
160 DEVMETHOD(device_attach, acpi_attach),
161 DEVMETHOD(device_shutdown, acpi_shutdown),
162 DEVMETHOD(device_detach, bus_generic_detach),
163 DEVMETHOD(device_suspend, acpi_suspend),
164 DEVMETHOD(device_resume, acpi_resume),
167 DEVMETHOD(bus_add_child, acpi_add_child),
168 DEVMETHOD(bus_print_child, acpi_print_child),
169 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
170 DEVMETHOD(bus_driver_added, acpi_driver_added),
171 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
172 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
173 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
174 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
175 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
176 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
177 DEVMETHOD(bus_release_resource, acpi_release_resource),
178 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
179 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
180 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
181 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
182 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
187 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
188 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
189 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
190 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
193 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method),
196 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
201 static driver_t acpi_driver = {
204 sizeof(struct acpi_softc),
207 static devclass_t acpi_devclass;
208 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
209 MODULE_VERSION(acpi, 1);
211 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
213 /* Local pools for managing system resources for ACPI child devices. */
214 static struct rman acpi_rman_io, acpi_rman_mem;
216 #define ACPI_MINIMUM_AWAKETIME 5
218 static const char* sleep_state_names[] = {
219 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
221 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
222 static char acpi_ca_version[12];
223 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
224 acpi_ca_version, 0, "Version of Intel ACPI-CA");
227 * Allow override of whether methods execute in parallel or not.
228 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
229 * errors for AML that really can't handle parallel method execution.
230 * It is off by default since this breaks recursive methods and
231 * some IBMs use such code.
233 static int acpi_serialize_methods;
234 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
236 /* Power devices off and on in suspend and resume. XXX Remove once tested. */
237 static int acpi_do_powerstate = 1;
238 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate);
239 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW,
240 &acpi_do_powerstate, 1, "Turn off devices when suspending.");
242 /* Allow users to override quirks. */
243 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
245 static int acpi_susp_bounce;
246 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
247 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
250 * ACPI can only be loaded as a module by the loader; activating it after
251 * system bootstrap time is not useful, and can be fatal to the system.
252 * It also cannot be unloaded, since the entire system bus heirarchy hangs
256 acpi_modevent(struct module *mod, int event, void *junk)
261 printf("The ACPI driver cannot be loaded after boot.\n");
266 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
276 * Perform early initialization.
281 static int started = 0;
285 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
287 /* Only run the startup code once. The MADT driver also calls this. */
289 return_VALUE (AE_OK);
293 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
294 * if more tables exist.
296 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
297 printf("ACPI: Table initialisation failed: %s\n",
298 AcpiFormatException(status));
299 return_VALUE (status);
302 /* Set up any quirks we have for this system. */
303 if (acpi_quirks == ACPI_Q_OK)
304 acpi_table_quirks(&acpi_quirks);
306 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
307 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
308 acpi_quirks &= ~ACPI_Q_BROKEN;
309 if (acpi_quirks & ACPI_Q_BROKEN) {
310 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
314 return_VALUE (status);
318 * Detect ACPI, perform early initialisation
321 acpi_identify(driver_t *driver, device_t parent)
325 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
330 /* Check that we haven't been disabled with a hint. */
331 if (resource_disabled("acpi", 0))
334 /* Make sure we're not being doubly invoked. */
335 if (device_find_child(parent, "acpi", 0) != NULL)
338 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
340 /* Initialize root tables. */
341 if (ACPI_FAILURE(acpi_Startup())) {
342 printf("ACPI: Try disabling either ACPI or apic support.\n");
346 /* Attach the actual ACPI device. */
347 if ((child = BUS_ADD_CHILD(parent, 10, "acpi", 0)) == NULL) {
348 device_printf(parent, "device_identify failed\n");
354 * Fetch some descriptive data from ACPI to put in our attach message.
357 acpi_probe(device_t dev)
359 ACPI_TABLE_RSDP *rsdp;
360 ACPI_TABLE_HEADER *rsdt;
361 ACPI_PHYSICAL_ADDRESS paddr;
362 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
365 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
367 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
368 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
369 device_printf(dev, "probe failed, other PM system enabled.\n");
370 return_VALUE (ENXIO);
373 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
374 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
375 return_VALUE (ENXIO);
376 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
377 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
379 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
380 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
382 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
383 return_VALUE (ENXIO);
384 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
385 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
388 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
391 device_set_desc_copy(dev, sbuf_data(&sb));
393 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
399 acpi_attach(device_t dev)
401 struct acpi_softc *sc;
402 ACPI_TABLE_FACS *facs;
409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
411 sc = device_get_softc(dev);
416 /* Initialize resource manager. */
417 acpi_rman_io.rm_type = RMAN_ARRAY;
418 acpi_rman_io.rm_start = 0;
419 acpi_rman_io.rm_end = 0xffff;
420 acpi_rman_io.rm_descr = "ACPI I/O ports";
421 if (rman_init(&acpi_rman_io) != 0)
422 panic("acpi rman_init IO ports failed");
423 acpi_rman_mem.rm_type = RMAN_ARRAY;
424 acpi_rman_mem.rm_start = 0;
425 acpi_rman_mem.rm_end = ~0ul;
426 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
427 if (rman_init(&acpi_rman_mem) != 0)
428 panic("acpi rman_init memory failed");
430 /* Initialise the ACPI mutex */
431 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
434 * Set the globals from our tunables. This is needed because ACPI-CA
435 * uses UINT8 for some values and we have no tunable_byte.
437 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods;
438 AcpiGbl_EnableInterpreterSlack = TRUE;
440 /* Start up the ACPI CA subsystem. */
441 status = AcpiInitializeSubsystem();
442 if (ACPI_FAILURE(status)) {
443 device_printf(dev, "Could not initialize Subsystem: %s\n",
444 AcpiFormatException(status));
448 /* Load ACPI name space. */
449 status = AcpiLoadTables();
450 if (ACPI_FAILURE(status)) {
451 device_printf(dev, "Could not load Namespace: %s\n",
452 AcpiFormatException(status));
456 /* Install the default address space handlers. */
457 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
458 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL);
459 if (ACPI_FAILURE(status)) {
460 device_printf(dev, "Could not initialise SystemMemory handler: %s\n",
461 AcpiFormatException(status));
464 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
465 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL);
466 if (ACPI_FAILURE(status)) {
467 device_printf(dev, "Could not initialise SystemIO handler: %s\n",
468 AcpiFormatException(status));
471 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
472 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
473 if (ACPI_FAILURE(status)) {
474 device_printf(dev, "could not initialise PciConfig handler: %s\n",
475 AcpiFormatException(status));
480 * Note that some systems (specifically, those with namespace evaluation
481 * issues that require the avoidance of parts of the namespace) must
482 * avoid running _INI and _STA on everything, as well as dodging the final
485 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
487 * XXX We should arrange for the object init pass after we have attached
488 * all our child devices, but on many systems it works here.
491 if (testenv("debug.acpi.avoid"))
492 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
494 /* Bring the hardware and basic handlers online. */
495 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
496 device_printf(dev, "Could not enable ACPI: %s\n",
497 AcpiFormatException(status));
502 * Call the ECDT probe function to provide EC functionality before
503 * the namespace has been evaluated.
505 * XXX This happens before the sysresource devices have been probed and
506 * attached so its resources come from nexus0. In practice, this isn't
507 * a problem but should be addressed eventually.
509 acpi_ec_ecdt_probe(dev);
510 acpi_hpet_table_probe(dev);
512 /* Bring device objects and regions online. */
513 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
514 device_printf(dev, "Could not initialize ACPI objects: %s\n",
515 AcpiFormatException(status));
520 * Setup our sysctl tree.
522 * XXX: This doesn't check to make sure that none of these fail.
524 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
525 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
526 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
527 device_get_name(dev), CTLFLAG_RD, 0, "");
528 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
529 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
530 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
531 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
532 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
533 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
534 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
535 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
536 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
537 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
538 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
539 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
540 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
541 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
542 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
543 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
544 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
545 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
546 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
547 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
549 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
550 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
551 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
552 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
553 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
554 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
555 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
556 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
557 OID_AUTO, "handle_reboot", CTLFLAG_RW,
558 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
561 * Default to 1 second before sleeping to give some machines time to
564 sc->acpi_sleep_delay = 1;
566 sc->acpi_verbose = 1;
567 if ((env = getenv("hw.acpi.verbose")) != NULL) {
568 if (strcmp(env, "0") != 0)
569 sc->acpi_verbose = 1;
573 /* Only enable S4BIOS by default if the FACS says it is available. */
574 status = AcpiGetTable(ACPI_SIG_FACS, 0, (ACPI_TABLE_HEADER **)&facs);
575 if (ACPI_FAILURE(status)) {
576 device_printf(dev, "couldn't get FACS: %s\n",
577 AcpiFormatException(status));
581 if (facs->Flags & ACPI_FACS_S4_BIOS_PRESENT)
585 * Dispatch the default sleep state to devices. The lid switch is set
586 * to NONE by default to avoid surprising users.
588 sc->acpi_power_button_sx = ACPI_STATE_S5;
589 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1;
590 sc->acpi_standby_sx = ACPI_STATE_S1;
591 sc->acpi_suspend_sx = ACPI_STATE_S3;
593 /* Pick the first valid sleep state for the sleep button default. */
594 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1;
595 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++)
596 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
597 sc->acpi_sleep_button_sx = state;
601 acpi_enable_fixed_events(sc);
604 * Scan the namespace and attach/initialise children.
607 /* Register our shutdown handler. */
608 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
612 * Register our acpi event handlers.
613 * XXX should be configurable eg. via userland policy manager.
615 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
616 sc, ACPI_EVENT_PRI_LAST);
617 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
618 sc, ACPI_EVENT_PRI_LAST);
620 /* Flag our initial states. */
621 sc->acpi_enabled = 1;
622 sc->acpi_sstate = ACPI_STATE_S0;
623 sc->acpi_sleep_disabled = 0;
625 /* Create the control device */
626 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
628 sc->acpi_dev_t->si_drv1 = sc;
630 if ((error = acpi_machdep_init(dev)))
633 /* Register ACPI again to pass the correct argument of pm_func. */
634 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
636 if (!acpi_disabled("bus"))
637 acpi_probe_children(dev);
642 return_VALUE (error);
646 acpi_suspend(device_t dev)
648 device_t child, *devlist;
649 int error, i, numdevs, pstate;
653 /* First give child devices a chance to suspend. */
654 error = bus_generic_suspend(dev);
659 * Now, set them into the appropriate power state, usually D3. If the
660 * device has an _SxD method for the next sleep state, use that power
663 device_get_children(dev, &devlist, &numdevs);
664 for (i = 0; i < numdevs; i++) {
665 /* If the device is not attached, we've powered it down elsewhere. */
667 if (!device_is_attached(child))
671 * Default to D3 for all sleep states. The _SxD method is optional
672 * so set the powerstate even if it's absent.
674 pstate = PCI_POWERSTATE_D3;
675 error = acpi_device_pwr_for_sleep(device_get_parent(child),
677 if ((error == 0 || error == ESRCH) && acpi_do_powerstate)
678 pci_set_powerstate(child, pstate);
680 free(devlist, M_TEMP);
687 acpi_resume(device_t dev)
691 device_t child, *devlist;
696 * Put all devices in D0 before resuming them. Call _S0D on each one
697 * since some systems expect this.
699 device_get_children(dev, &devlist, &numdevs);
700 for (i = 0; i < numdevs; i++) {
702 handle = acpi_get_handle(child);
704 AcpiEvaluateObject(handle, "_S0D", NULL, NULL);
705 if (device_is_attached(child) && acpi_do_powerstate)
706 pci_set_powerstate(child, PCI_POWERSTATE_D0);
708 free(devlist, M_TEMP);
710 return (bus_generic_resume(dev));
714 acpi_shutdown(device_t dev)
719 /* Allow children to shutdown first. */
720 bus_generic_shutdown(dev);
723 * Enable any GPEs that are able to power-on the system (i.e., RTC).
724 * Also, disable any that are not valid for this state (most).
726 acpi_wake_prep_walk(ACPI_STATE_S5);
732 * Handle a new device being added
735 acpi_add_child(device_t bus, int order, const char *name, int unit)
737 struct acpi_device *ad;
740 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
743 resource_list_init(&ad->ad_rl);
745 child = device_add_child_ordered(bus, order, name, unit);
747 device_set_ivars(child, ad);
754 acpi_print_child(device_t bus, device_t child)
756 struct acpi_device *adev = device_get_ivars(child);
757 struct resource_list *rl = &adev->ad_rl;
760 retval += bus_print_child_header(bus, child);
761 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
762 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
763 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
764 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
765 if (device_get_flags(child))
766 retval += printf(" flags %#x", device_get_flags(child));
767 retval += bus_print_child_footer(bus, child);
773 * If this device is an ACPI child but no one claimed it, attempt
774 * to power it off. We'll power it back up when a driver is added.
776 * XXX Disabled for now since many necessary devices (like fdc and
777 * ATA) don't claim the devices we created for them but still expect
778 * them to be powered up.
781 acpi_probe_nomatch(device_t bus, device_t child)
784 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
788 * If a new driver has a chance to probe a child, first power it up.
790 * XXX Disabled for now (see acpi_probe_nomatch for details).
793 acpi_driver_added(device_t dev, driver_t *driver)
795 device_t child, *devlist;
798 DEVICE_IDENTIFY(driver, dev);
799 device_get_children(dev, &devlist, &numdevs);
800 for (i = 0; i < numdevs; i++) {
802 if (device_get_state(child) == DS_NOTPRESENT) {
803 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */
804 if (device_probe_and_attach(child) != 0)
805 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
808 free(devlist, M_TEMP);
811 /* Location hint for devctl(8) */
813 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
816 struct acpi_device *dinfo = device_get_ivars(child);
818 if (dinfo->ad_handle)
819 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
821 snprintf(buf, buflen, "unknown");
825 /* PnP information for devctl(8) */
827 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
830 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL};
831 ACPI_DEVICE_INFO *adinfo;
832 struct acpi_device *dinfo = device_get_ivars(child);
836 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf);
837 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer;
839 snprintf(buf, buflen, "unknown");
841 snprintf(buf, buflen, "_HID=%s _UID=%lu",
842 (adinfo->Valid & ACPI_VALID_HID) ?
843 adinfo->HardwareId.Value : "none",
844 (adinfo->Valid & ACPI_VALID_UID) ?
845 strtoul(adinfo->UniqueId.Value, &end, 10) : 0);
853 * Handle per-device ivars
856 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
858 struct acpi_device *ad;
860 if ((ad = device_get_ivars(child)) == NULL) {
861 printf("device has no ivars\n");
865 /* ACPI and ISA compatibility ivars */
867 case ACPI_IVAR_HANDLE:
868 *(ACPI_HANDLE *)result = ad->ad_handle;
870 case ACPI_IVAR_MAGIC:
871 *(int *)result = ad->ad_magic;
873 case ACPI_IVAR_PRIVATE:
874 *(void **)result = ad->ad_private;
876 case ACPI_IVAR_FLAGS:
877 *(int *)result = ad->ad_flags;
879 case ISA_IVAR_VENDORID:
880 case ISA_IVAR_SERIAL:
881 case ISA_IVAR_COMPATID:
884 case ISA_IVAR_LOGICALID:
885 *(int *)result = acpi_isa_get_logicalid(child);
895 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
897 struct acpi_device *ad;
899 if ((ad = device_get_ivars(child)) == NULL) {
900 printf("device has no ivars\n");
905 case ACPI_IVAR_HANDLE:
906 ad->ad_handle = (ACPI_HANDLE)value;
908 case ACPI_IVAR_MAGIC:
909 ad->ad_magic = (int)value;
911 case ACPI_IVAR_PRIVATE:
912 ad->ad_private = (void *)value;
914 case ACPI_IVAR_FLAGS:
915 ad->ad_flags = (int)value;
918 panic("bad ivar write request (%d)", index);
926 * Handle child resource allocation/removal
928 static struct resource_list *
929 acpi_get_rlist(device_t dev, device_t child)
931 struct acpi_device *ad;
933 ad = device_get_ivars(child);
938 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
939 * duplicates, we merge any in the sysresource attach routine.
942 acpi_sysres_alloc(device_t dev)
944 struct resource *res;
945 struct resource_list *rl;
946 struct resource_list_entry *rle;
948 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
953 * Probe/attach any sysresource devices. This would be unnecessary if we
954 * had multi-pass probe/attach.
956 if (device_get_children(dev, &children, &child_count) != 0)
958 for (i = 0; i < child_count; i++) {
959 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
960 device_probe_and_attach(children[i]);
962 free(children, M_TEMP);
964 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
965 STAILQ_FOREACH(rle, rl, link) {
966 if (rle->res != NULL) {
967 device_printf(dev, "duplicate resource for %lx\n", rle->start);
971 /* Only memory and IO resources are valid here. */
983 /* Pre-allocate resource and add to our rman pool. */
984 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
985 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
987 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
990 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
991 rle->start, rle->count, rle->type);
996 static struct resource *
997 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
998 u_long start, u_long end, u_long count, u_int flags)
1001 struct acpi_device *ad = device_get_ivars(child);
1002 struct resource_list *rl = &ad->ad_rl;
1003 struct resource_list_entry *rle;
1004 struct resource *res;
1009 /* We only handle memory and IO resources through rman. */
1011 case SYS_RES_IOPORT:
1014 case SYS_RES_MEMORY:
1015 rm = &acpi_rman_mem;
1021 ACPI_SERIAL_BEGIN(acpi);
1024 * If this is an allocation of the "default" range for a given RID, and
1025 * we know what the resources for this device are (i.e., they're on the
1026 * child's resource list), use those start/end values.
1028 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) {
1029 rle = resource_list_find(rl, type, *rid);
1038 * If this is an allocation of a specific range, see if we can satisfy
1039 * the request from our system resource regions. If we can't, pass the
1040 * request up to the parent.
1042 if (start + count - 1 == end && rm != NULL)
1043 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1046 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1047 start, end, count, flags);
1049 rman_set_rid(res, *rid);
1051 /* If requested, activate the resource using the parent's method. */
1052 if (flags & RF_ACTIVE)
1053 if (bus_activate_resource(child, type, *rid, res) != 0) {
1054 rman_release_resource(res);
1060 if (res != NULL && device_get_parent(child) == bus)
1064 * Since bus_config_intr() takes immediate effect, we cannot
1065 * configure the interrupt associated with a device when we
1066 * parse the resources but have to defer it until a driver
1067 * actually allocates the interrupt via bus_alloc_resource().
1069 * XXX: Should we handle the lookup failing?
1071 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1072 acpi_config_intr(child, &ares);
1077 ACPI_SERIAL_END(acpi);
1082 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1088 /* We only handle memory and IO resources through rman. */
1090 case SYS_RES_IOPORT:
1093 case SYS_RES_MEMORY:
1094 rm = &acpi_rman_mem;
1100 ACPI_SERIAL_BEGIN(acpi);
1103 * If this resource belongs to one of our internal managers,
1104 * deactivate it and release it to the local pool. If it doesn't,
1105 * pass this request up to the parent.
1107 if (rm != NULL && rman_is_region_manager(r, rm)) {
1108 if (rman_get_flags(r) & RF_ACTIVE) {
1109 ret = bus_deactivate_resource(child, type, rid, r);
1113 ret = rman_release_resource(r);
1115 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
1118 ACPI_SERIAL_END(acpi);
1123 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1125 struct resource_list *rl;
1127 rl = acpi_get_rlist(bus, child);
1128 resource_list_delete(rl, type, rid);
1131 /* Allocate an IO port or memory resource, given its GAS. */
1133 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1134 struct resource **res, u_int flags)
1136 int error, res_type;
1139 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1142 /* We only support memory and IO spaces. */
1143 switch (gas->SpaceId) {
1144 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1145 res_type = SYS_RES_MEMORY;
1147 case ACPI_ADR_SPACE_SYSTEM_IO:
1148 res_type = SYS_RES_IOPORT;
1151 return (EOPNOTSUPP);
1155 * If the register width is less than 8, assume the BIOS author means
1156 * it is a bit field and just allocate a byte.
1158 if (gas->BitWidth && gas->BitWidth < 8)
1161 /* Validate the address after we're sure we support the space. */
1162 if (gas->Address == 0 || gas->BitWidth == 0)
1165 bus_set_resource(dev, res_type, *rid, gas->Address,
1167 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1172 bus_delete_resource(dev, res_type, *rid);
1177 /* Probe _HID and _CID for compatible ISA PNP ids. */
1179 acpi_isa_get_logicalid(device_t dev)
1181 ACPI_DEVICE_INFO *devinfo;
1187 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1191 buf.Length = ACPI_ALLOCATE_BUFFER;
1193 /* Fetch and validate the HID. */
1194 if ((h = acpi_get_handle(dev)) == NULL)
1196 error = AcpiGetObjectInfo(h, &buf);
1197 if (ACPI_FAILURE(error))
1199 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1201 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
1202 pnpid = PNP_EISAID(devinfo->HardwareId.Value);
1205 if (buf.Pointer != NULL)
1206 AcpiOsFree(buf.Pointer);
1207 return_VALUE (pnpid);
1211 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1213 ACPI_DEVICE_INFO *devinfo;
1220 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1225 buf.Length = ACPI_ALLOCATE_BUFFER;
1227 /* Fetch and validate the CID */
1228 if ((h = acpi_get_handle(dev)) == NULL)
1230 error = AcpiGetObjectInfo(h, &buf);
1231 if (ACPI_FAILURE(error))
1233 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1234 if ((devinfo->Valid & ACPI_VALID_CID) == 0)
1237 if (devinfo->CompatibilityId.Count < count)
1238 count = devinfo->CompatibilityId.Count;
1239 for (i = 0; i < count; i++) {
1240 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0)
1242 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value);
1247 if (buf.Pointer != NULL)
1248 AcpiOsFree(buf.Pointer);
1249 return_VALUE (valid);
1253 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1258 h = acpi_get_handle(dev);
1259 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE)
1262 /* Try to match one of the array of IDs with a HID or CID. */
1263 for (i = 0; ids[i] != NULL; i++) {
1264 if (acpi_MatchHid(h, ids[i]))
1271 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1272 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1277 h = ACPI_ROOT_OBJECT;
1278 else if ((h = acpi_get_handle(dev)) == NULL)
1279 return (AE_BAD_PARAMETER);
1280 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1284 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1286 struct acpi_softc *sc;
1292 sc = device_get_softc(bus);
1293 handle = acpi_get_handle(dev);
1296 * XXX If we find these devices, don't try to power them down.
1297 * The serial and IRDA ports on my T23 hang the system when
1298 * set to D3 and it appears that such legacy devices may
1299 * need special handling in their drivers.
1301 if (handle == NULL ||
1302 acpi_MatchHid(handle, "PNP0500") ||
1303 acpi_MatchHid(handle, "PNP0501") ||
1304 acpi_MatchHid(handle, "PNP0502") ||
1305 acpi_MatchHid(handle, "PNP0510") ||
1306 acpi_MatchHid(handle, "PNP0511"))
1310 * Override next state with the value from _SxD, if present. If no
1311 * dstate argument was provided, don't fetch the return value.
1313 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1315 status = acpi_GetInteger(handle, sxd, dstate);
1317 status = AcpiEvaluateObject(handle, sxd, NULL, NULL);
1334 /* Callback arg for our implementation of walking the namespace. */
1335 struct acpi_device_scan_ctx {
1336 acpi_scan_cb_t user_fn;
1342 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1344 struct acpi_device_scan_ctx *ctx;
1345 device_t dev, old_dev;
1347 ACPI_OBJECT_TYPE type;
1350 * Skip this device if we think we'll have trouble with it or it is
1351 * the parent where the scan began.
1353 ctx = (struct acpi_device_scan_ctx *)arg;
1354 if (acpi_avoid(h) || h == ctx->parent)
1357 /* If this is not a valid device type (e.g., a method), skip it. */
1358 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1360 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1361 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1365 * Call the user function with the current device. If it is unchanged
1366 * afterwards, return. Otherwise, we update the handle to the new dev.
1368 old_dev = acpi_get_device(h);
1370 status = ctx->user_fn(h, &dev, level, ctx->arg);
1371 if (ACPI_FAILURE(status) || old_dev == dev)
1374 /* Remove the old child and its connection to the handle. */
1375 if (old_dev != NULL) {
1376 device_delete_child(device_get_parent(old_dev), old_dev);
1377 AcpiDetachData(h, acpi_fake_objhandler);
1380 /* Recreate the handle association if the user created a device. */
1382 AcpiAttachData(h, acpi_fake_objhandler, dev);
1388 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1389 acpi_scan_cb_t user_fn, void *arg)
1392 struct acpi_device_scan_ctx ctx;
1394 if (acpi_disabled("children"))
1398 h = ACPI_ROOT_OBJECT;
1399 else if ((h = acpi_get_handle(dev)) == NULL)
1400 return (AE_BAD_PARAMETER);
1401 ctx.user_fn = user_fn;
1404 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1405 acpi_device_scan_cb, &ctx, NULL));
1409 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1410 * device power states since it's close enough to ACPI.
1413 acpi_set_powerstate_method(device_t bus, device_t child, int state)
1420 h = acpi_get_handle(child);
1421 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
1426 /* Ignore errors if the power methods aren't present. */
1427 status = acpi_pwr_switch_consumer(h, state);
1428 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND
1429 && status != AE_BAD_PARAMETER)
1430 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n",
1431 state, acpi_name(h), AcpiFormatException(status));
1437 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1439 int result, cid_count, i;
1440 uint32_t lid, cids[8];
1442 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1445 * ISA-style drivers attached to ACPI may persist and
1446 * probe manually if we return ENOENT. We never want
1447 * that to happen, so don't ever return it.
1451 /* Scan the supplied IDs for a match */
1452 lid = acpi_isa_get_logicalid(child);
1453 cid_count = acpi_isa_get_compatid(child, cids, 8);
1454 while (ids && ids->ip_id) {
1455 if (lid == ids->ip_id) {
1459 for (i = 0; i < cid_count; i++) {
1460 if (cids[i] == ids->ip_id) {
1469 if (result == 0 && ids->ip_desc)
1470 device_set_desc(child, ids->ip_desc);
1472 return_VALUE (result);
1476 * Scan all of the ACPI namespace and attach child devices.
1478 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1479 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1480 * However, in violation of the spec, some systems place their PCI link
1481 * devices in \, so we have to walk the whole namespace. We check the
1482 * type of namespace nodes, so this should be ok.
1485 acpi_probe_children(device_t bus)
1488 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1491 * Scan the namespace and insert placeholders for all the devices that
1492 * we find. We also probe/attach any early devices.
1494 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1495 * we want to create nodes for all devices, not just those that are
1496 * currently present. (This assumes that we don't want to create/remove
1497 * devices as they appear, which might be smarter.)
1499 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1500 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1503 /* Pre-allocate resources for our rman from any sysresource devices. */
1504 acpi_sysres_alloc(bus);
1506 /* Create any static children by calling device identify methods. */
1507 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1508 bus_generic_probe(bus);
1510 /* Probe/attach all children, created staticly and from the namespace. */
1511 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
1512 bus_generic_attach(bus);
1515 * Some of these children may have attached others as part of their attach
1516 * process (eg. the root PCI bus driver), so rescan.
1518 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
1519 bus_generic_attach(bus);
1521 /* Attach wake sysctls. */
1522 acpi_wake_sysctl_walk(bus);
1524 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1529 * Determine the probe order for a given device and return non-zero if it
1530 * should be attached immediately.
1533 acpi_probe_order(ACPI_HANDLE handle, int *order)
1537 * 1. I/O port and memory system resource holders
1538 * 2. Embedded controllers (to handle early accesses)
1539 * 3. PCI Link Devices
1541 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02"))
1543 else if (acpi_MatchHid(handle, "PNP0C09"))
1545 else if (acpi_MatchHid(handle, "PNP0C0F"))
1551 * Evaluate a child device and determine whether we might attach a device to
1555 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1557 ACPI_OBJECT_TYPE type;
1559 device_t bus, child;
1561 char *handle_str, **search;
1562 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL};
1564 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1566 /* Skip this device if we think we'll have trouble with it. */
1567 if (acpi_avoid(handle))
1568 return_ACPI_STATUS (AE_OK);
1570 bus = (device_t)context;
1571 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1573 case ACPI_TYPE_DEVICE:
1574 case ACPI_TYPE_PROCESSOR:
1575 case ACPI_TYPE_THERMAL:
1576 case ACPI_TYPE_POWER:
1577 if (acpi_disabled("children"))
1581 * Since we scan from \, be sure to skip system scope objects.
1582 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?)
1584 handle_str = acpi_name(handle);
1585 for (search = scopes; *search != NULL; search++) {
1586 if (strcmp(handle_str, *search) == 0)
1589 if (*search != NULL)
1593 * Create a placeholder device for this node. Sort the placeholder
1594 * so that the probe/attach passes will run breadth-first. Orders
1595 * less than 10 are reserved for special objects (i.e., system
1596 * resources). Larger values are used for all other devices.
1598 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1599 order = (level + 1) * 10;
1600 acpi_probe_order(handle, &order);
1601 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1605 /* Associate the handle with the device_t and vice versa. */
1606 acpi_set_handle(child, handle);
1607 AcpiAttachData(handle, acpi_fake_objhandler, child);
1610 * Check that the device is present. If it's not present,
1611 * leave it disabled (so that we have a device_t attached to
1612 * the handle, but we don't probe it).
1614 * XXX PCI link devices sometimes report "present" but not
1615 * "functional" (i.e. if disabled). Go ahead and probe them
1616 * anyway since we may enable them later.
1618 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1619 /* Never disable PCI link devices. */
1620 if (acpi_MatchHid(handle, "PNP0C0F"))
1623 * Docking stations should remain enabled since the system
1624 * may be undocked at boot.
1626 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1629 device_disable(child);
1634 * Get the device's resource settings and attach them.
1635 * Note that if the device has _PRS but no _CRS, we need
1636 * to decide when it's appropriate to try to configure the
1637 * device. Ignore the return value here; it's OK for the
1638 * device not to have any resources.
1640 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1645 return_ACPI_STATUS (AE_OK);
1649 * AcpiAttachData() requires an object handler but never uses it. This is a
1650 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1653 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data)
1658 acpi_shutdown_final(void *arg, int howto)
1660 struct acpi_softc *sc;
1664 * XXX Shutdown code should only run on the BSP (cpuid 0).
1665 * Some chipsets do not power off the system correctly if called from
1669 if ((howto & RB_POWEROFF) != 0) {
1670 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1671 if (ACPI_FAILURE(status)) {
1672 printf("AcpiEnterSleepStatePrep failed - %s\n",
1673 AcpiFormatException(status));
1676 printf("Powering system off using ACPI\n");
1677 ACPI_DISABLE_IRQS();
1678 status = AcpiEnterSleepState(ACPI_STATE_S5);
1679 if (ACPI_FAILURE(status)) {
1680 printf("ACPI power-off failed - %s\n", AcpiFormatException(status));
1683 printf("ACPI power-off failed - timeout\n");
1685 } else if ((howto & RB_HALT) == 0 &&
1686 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) &&
1687 sc->acpi_handle_reboot) {
1688 /* Reboot using the reset register. */
1689 status = AcpiHwLowLevelWrite(
1690 AcpiGbl_FADT.ResetRegister.BitWidth,
1691 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister);
1692 if (ACPI_FAILURE(status)) {
1693 printf("ACPI reset failed - %s\n", AcpiFormatException(status));
1696 printf("ACPI reset failed - timeout\n");
1698 } else if (sc->acpi_do_disable && panicstr == NULL) {
1700 * Only disable ACPI if the user requested. On some systems, writing
1701 * the disable value to SMI_CMD hangs the system.
1703 printf("Shutting down ACPI\n");
1709 acpi_enable_fixed_events(struct acpi_softc *sc)
1711 static int first_time = 1;
1713 /* Enable and clear fixed events and install handlers. */
1714 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
1715 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1716 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1717 acpi_event_power_button_sleep, sc);
1719 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1721 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
1722 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1723 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1724 acpi_event_sleep_button_sleep, sc);
1726 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1733 * Returns true if the device is actually present and should
1734 * be attached to. This requires the present, enabled, UI-visible
1735 * and diagnostics-passed bits to be set.
1738 acpi_DeviceIsPresent(device_t dev)
1740 ACPI_DEVICE_INFO *devinfo;
1747 if ((h = acpi_get_handle(dev)) == NULL)
1750 buf.Length = ACPI_ALLOCATE_BUFFER;
1751 error = AcpiGetObjectInfo(h, &buf);
1752 if (ACPI_FAILURE(error))
1754 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1756 /* If no _STA method, must be present */
1757 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1760 /* Return true for 'present' and 'functioning' */
1761 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus))
1764 AcpiOsFree(buf.Pointer);
1769 * Returns true if the battery is actually present and inserted.
1772 acpi_BatteryIsPresent(device_t dev)
1774 ACPI_DEVICE_INFO *devinfo;
1781 if ((h = acpi_get_handle(dev)) == NULL)
1784 buf.Length = ACPI_ALLOCATE_BUFFER;
1785 error = AcpiGetObjectInfo(h, &buf);
1786 if (ACPI_FAILURE(error))
1788 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1790 /* If no _STA method, must be present */
1791 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1794 /* Return true for 'present', 'battery present', and 'functioning' */
1795 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus))
1798 AcpiOsFree(buf.Pointer);
1803 * Match a HID string against a handle
1806 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
1808 ACPI_DEVICE_INFO *devinfo;
1814 if (hid == NULL || h == NULL)
1817 buf.Length = ACPI_ALLOCATE_BUFFER;
1818 error = AcpiGetObjectInfo(h, &buf);
1819 if (ACPI_FAILURE(error))
1821 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1823 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1824 strcmp(hid, devinfo->HardwareId.Value) == 0)
1826 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) {
1827 for (i = 0; i < devinfo->CompatibilityId.Count; i++) {
1828 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) {
1835 AcpiOsFree(buf.Pointer);
1840 * Return the handle of a named object within our scope, ie. that of (parent)
1841 * or one if its parents.
1844 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1849 /* Walk back up the tree to the root */
1851 status = AcpiGetHandle(parent, path, &r);
1852 if (ACPI_SUCCESS(status)) {
1856 /* XXX Return error here? */
1857 if (status != AE_NOT_FOUND)
1859 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1860 return (AE_NOT_FOUND);
1865 /* Find the difference between two PM tick counts. */
1867 acpi_TimerDelta(uint32_t end, uint32_t start)
1872 delta = end - start;
1873 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER)
1874 delta = ((0xFFFFFFFF - start) + end + 1);
1876 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
1881 * Allocate a buffer with a preset data size.
1884 acpi_AllocBuffer(int size)
1888 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
1891 buf->Pointer = (void *)(buf + 1);
1896 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
1899 ACPI_OBJECT_LIST args;
1901 arg1.Type = ACPI_TYPE_INTEGER;
1902 arg1.Integer.Value = number;
1904 args.Pointer = &arg1;
1906 return (AcpiEvaluateObject(handle, path, &args, NULL));
1910 * Evaluate a path that should return an integer.
1913 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
1920 handle = ACPI_ROOT_OBJECT;
1923 * Assume that what we've been pointed at is an Integer object, or
1924 * a method that will return an Integer.
1926 buf.Pointer = ¶m;
1927 buf.Length = sizeof(param);
1928 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1929 if (ACPI_SUCCESS(status)) {
1930 if (param.Type == ACPI_TYPE_INTEGER)
1931 *number = param.Integer.Value;
1937 * In some applications, a method that's expected to return an Integer
1938 * may instead return a Buffer (probably to simplify some internal
1939 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1940 * convert it into an Integer as best we can.
1944 if (status == AE_BUFFER_OVERFLOW) {
1945 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1946 status = AE_NO_MEMORY;
1948 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1949 if (ACPI_SUCCESS(status))
1950 status = acpi_ConvertBufferToInteger(&buf, number);
1951 AcpiOsFree(buf.Pointer);
1958 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
1964 p = (ACPI_OBJECT *)bufp->Pointer;
1965 if (p->Type == ACPI_TYPE_INTEGER) {
1966 *number = p->Integer.Value;
1969 if (p->Type != ACPI_TYPE_BUFFER)
1971 if (p->Buffer.Length > sizeof(int))
1972 return (AE_BAD_DATA);
1975 val = p->Buffer.Pointer;
1976 for (i = 0; i < p->Buffer.Length; i++)
1977 *number += val[i] << (i * 8);
1982 * Iterate over the elements of an a package object, calling the supplied
1983 * function for each element.
1985 * XXX possible enhancement might be to abort traversal on error.
1988 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
1989 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
1994 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
1995 return (AE_BAD_PARAMETER);
1997 /* Iterate over components */
1999 comp = pkg->Package.Elements;
2000 for (; i < pkg->Package.Count; i++, comp++)
2007 * Find the (index)th resource object in a set.
2010 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2015 rp = (ACPI_RESOURCE *)buf->Pointer;
2019 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2020 return (AE_BAD_PARAMETER);
2022 /* Check for terminator */
2023 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2024 return (AE_NOT_FOUND);
2025 rp = ACPI_NEXT_RESOURCE(rp);
2034 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2036 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2037 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2038 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2041 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2044 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2049 /* Initialise the buffer if necessary. */
2050 if (buf->Pointer == NULL) {
2051 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2052 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2053 return (AE_NO_MEMORY);
2054 rp = (ACPI_RESOURCE *)buf->Pointer;
2055 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2062 * Scan the current buffer looking for the terminator.
2063 * This will either find the terminator or hit the end
2064 * of the buffer and return an error.
2066 rp = (ACPI_RESOURCE *)buf->Pointer;
2068 /* Range check, don't go outside the buffer */
2069 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2070 return (AE_BAD_PARAMETER);
2071 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2073 rp = ACPI_NEXT_RESOURCE(rp);
2077 * Check the size of the buffer and expand if required.
2080 * size of existing resources before terminator +
2081 * size of new resource and header +
2082 * size of terminator.
2084 * Note that this loop should really only run once, unless
2085 * for some reason we are stuffing a *really* huge resource.
2087 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2088 res->Length + ACPI_RS_SIZE_NO_DATA +
2089 ACPI_RS_SIZE_MIN) >= buf->Length) {
2090 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2091 return (AE_NO_MEMORY);
2092 bcopy(buf->Pointer, newp, buf->Length);
2093 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2094 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2095 AcpiOsFree(buf->Pointer);
2096 buf->Pointer = newp;
2097 buf->Length += buf->Length;
2100 /* Insert the new resource. */
2101 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2103 /* And add the terminator. */
2104 rp = ACPI_NEXT_RESOURCE(rp);
2105 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2112 * Set interrupt model.
2115 acpi_SetIntrModel(int model)
2118 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2122 acpi_sleep_enable(void *arg)
2125 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
2128 enum acpi_sleep_state {
2131 ACPI_SS_DEV_SUSPEND,
2137 * Set the system sleep state
2139 * Currently we support S1-S5 but S4 is only S4BIOS
2142 acpi_SetSleepState(struct acpi_softc *sc, int state)
2147 enum acpi_sleep_state slp_state;
2149 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2153 if (sc->acpi_sleep_disabled) {
2154 if (sc->acpi_sstate != ACPI_STATE_S0)
2157 printf("acpi: suspend request ignored (not ready yet)\n");
2160 sc->acpi_sleep_disabled = 1;
2164 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2165 * drivers need this.
2168 slp_state = ACPI_SS_NONE;
2174 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB);
2175 if (status == AE_NOT_FOUND) {
2176 device_printf(sc->acpi_dev,
2177 "Sleep state S%d not supported by BIOS\n", state);
2179 } else if (ACPI_FAILURE(status)) {
2180 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n",
2181 AcpiFormatException(status));
2185 sc->acpi_sstate = state;
2187 /* Enable any GPEs as appropriate and requested by the user. */
2188 acpi_wake_prep_walk(state);
2189 slp_state = ACPI_SS_GPE_SET;
2192 * Inform all devices that we are going to sleep. If at least one
2193 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2195 * XXX Note that a better two-pass approach with a 'veto' pass
2196 * followed by a "real thing" pass would be better, but the current
2197 * bus interface does not provide for this.
2199 if (DEVICE_SUSPEND(root_bus) != 0) {
2200 device_printf(sc->acpi_dev, "device_suspend failed\n");
2203 slp_state = ACPI_SS_DEV_SUSPEND;
2205 /* If testing device suspend only, back out of everything here. */
2206 if (acpi_susp_bounce)
2209 status = AcpiEnterSleepStatePrep(state);
2210 if (ACPI_FAILURE(status)) {
2211 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2212 AcpiFormatException(status));
2215 slp_state = ACPI_SS_SLP_PREP;
2217 if (sc->acpi_sleep_delay > 0)
2218 DELAY(sc->acpi_sleep_delay * 1000000);
2220 if (state != ACPI_STATE_S1) {
2221 acpi_sleep_machdep(sc, state);
2223 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2224 if (state == ACPI_STATE_S4)
2227 ACPI_DISABLE_IRQS();
2228 status = AcpiEnterSleepState(state);
2229 if (ACPI_FAILURE(status)) {
2230 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2231 AcpiFormatException(status));
2235 slp_state = ACPI_SS_SLEPT;
2239 * Shut down cleanly and power off. This will call us back through the
2240 * shutdown handlers.
2242 shutdown_nice(RB_POWEROFF);
2246 status = AE_BAD_PARAMETER;
2251 * Back out state according to how far along we got in the suspend
2252 * process. This handles both the error and success cases.
2254 if (slp_state >= ACPI_SS_GPE_SET) {
2255 acpi_wake_prep_walk(state);
2256 sc->acpi_sstate = ACPI_STATE_S0;
2258 if (slp_state >= ACPI_SS_SLP_PREP)
2259 AcpiLeaveSleepState(state);
2260 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2261 DEVICE_RESUME(root_bus);
2262 if (slp_state >= ACPI_SS_SLEPT)
2263 acpi_enable_fixed_events(sc);
2265 /* Allow another sleep request after a while. */
2266 if (state != ACPI_STATE_S5)
2267 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME);
2270 return_ACPI_STATUS (status);
2273 /* Initialize a device's wake GPE. */
2275 acpi_wake_init(device_t dev, int type)
2277 struct acpi_prw_data prw;
2279 /* Evaluate _PRW to find the GPE. */
2280 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2283 /* Set the requested type for the GPE (runtime, wake, or both). */
2284 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) {
2285 device_printf(dev, "set GPE type failed\n");
2292 /* Enable or disable the device's wake GPE. */
2294 acpi_wake_set_enable(device_t dev, int enable)
2296 struct acpi_prw_data prw;
2300 /* Make sure the device supports waking the system and get the GPE. */
2301 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2304 flags = acpi_get_flags(dev);
2306 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2307 if (ACPI_FAILURE(status)) {
2308 device_printf(dev, "enable wake failed\n");
2311 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2313 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2314 if (ACPI_FAILURE(status)) {
2315 device_printf(dev, "disable wake failed\n");
2318 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2325 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2327 struct acpi_prw_data prw;
2330 /* Check that this is a wake-capable device and get its GPE. */
2331 if (acpi_parse_prw(handle, &prw) != 0)
2333 dev = acpi_get_device(handle);
2336 * The destination sleep state must be less than (i.e., higher power)
2337 * or equal to the value specified by _PRW. If this GPE cannot be
2338 * enabled for the next sleep state, then disable it. If it can and
2339 * the user requested it be enabled, turn on any required power resources
2342 if (sstate > prw.lowest_wake) {
2343 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2345 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2346 acpi_name(handle), sstate);
2347 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2348 acpi_pwr_wake_enable(handle, 1);
2349 acpi_SetInteger(handle, "_PSW", 1);
2351 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2352 acpi_name(handle), sstate);
2359 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2361 struct acpi_prw_data prw;
2365 * Check that this is a wake-capable device and get its GPE. Return
2366 * now if the user didn't enable this device for wake.
2368 if (acpi_parse_prw(handle, &prw) != 0)
2370 dev = acpi_get_device(handle);
2371 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2375 * If this GPE couldn't be enabled for the previous sleep state, it was
2376 * disabled before going to sleep so re-enable it. If it was enabled,
2377 * clear _PSW and turn off any power resources it used.
2379 if (sstate > prw.lowest_wake) {
2380 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2382 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2384 acpi_SetInteger(handle, "_PSW", 0);
2385 acpi_pwr_wake_enable(handle, 0);
2387 device_printf(dev, "run_prep cleaned up for %s\n",
2395 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2399 /* If suspending, run the sleep prep function, otherwise wake. */
2400 sstate = *(int *)context;
2401 if (AcpiGbl_SystemAwakeAndRunning)
2402 acpi_wake_sleep_prep(handle, sstate);
2404 acpi_wake_run_prep(handle, sstate);
2408 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2410 acpi_wake_prep_walk(int sstate)
2412 ACPI_HANDLE sb_handle;
2414 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2415 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2416 acpi_wake_prep, &sstate, NULL);
2420 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2422 acpi_wake_sysctl_walk(device_t dev)
2424 int error, i, numdevs;
2429 error = device_get_children(dev, &devlist, &numdevs);
2430 if (error != 0 || numdevs == 0) {
2432 free(devlist, M_TEMP);
2435 for (i = 0; i < numdevs; i++) {
2437 acpi_wake_sysctl_walk(child);
2438 if (!device_is_attached(child))
2440 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2441 if (ACPI_SUCCESS(status)) {
2442 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2443 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2444 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2445 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2448 free(devlist, M_TEMP);
2453 /* Enable or disable wake from userland. */
2455 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2460 dev = (device_t)arg1;
2461 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2463 error = sysctl_handle_int(oidp, &enable, 0, req);
2464 if (error != 0 || req->newptr == NULL)
2466 if (enable != 0 && enable != 1)
2469 return (acpi_wake_set_enable(dev, enable));
2472 /* Parse a device's _PRW into a structure. */
2474 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2477 ACPI_BUFFER prw_buffer;
2478 ACPI_OBJECT *res, *res2;
2479 int error, i, power_count;
2481 if (h == NULL || prw == NULL)
2485 * The _PRW object (7.2.9) is only required for devices that have the
2486 * ability to wake the system from a sleeping state.
2489 prw_buffer.Pointer = NULL;
2490 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2491 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2492 if (ACPI_FAILURE(status))
2494 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2497 if (!ACPI_PKG_VALID(res, 2))
2501 * Element 1 of the _PRW object:
2502 * The lowest power system sleeping state that can be entered while still
2503 * providing wake functionality. The sleeping state being entered must
2504 * be less than (i.e., higher power) or equal to this value.
2506 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2510 * Element 0 of the _PRW object:
2512 switch (res->Package.Elements[0].Type) {
2513 case ACPI_TYPE_INTEGER:
2515 * If the data type of this package element is numeric, then this
2516 * _PRW package element is the bit index in the GPEx_EN, in the
2517 * GPE blocks described in the FADT, of the enable bit that is
2518 * enabled for the wake event.
2520 prw->gpe_handle = NULL;
2521 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2524 case ACPI_TYPE_PACKAGE:
2526 * If the data type of this package element is a package, then this
2527 * _PRW package element is itself a package containing two
2528 * elements. The first is an object reference to the GPE Block
2529 * device that contains the GPE that will be triggered by the wake
2530 * event. The second element is numeric and it contains the bit
2531 * index in the GPEx_EN, in the GPE Block referenced by the
2532 * first element in the package, of the enable bit that is enabled for
2535 * For example, if this field is a package then it is of the form:
2536 * Package() {\_SB.PCI0.ISA.GPE, 2}
2538 res2 = &res->Package.Elements[0];
2539 if (!ACPI_PKG_VALID(res2, 2))
2541 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2542 if (prw->gpe_handle == NULL)
2544 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2552 /* Elements 2 to N of the _PRW object are power resources. */
2553 power_count = res->Package.Count - 2;
2554 if (power_count > ACPI_PRW_MAX_POWERRES) {
2555 printf("ACPI device %s has too many power resources\n", acpi_name(h));
2558 prw->power_res_count = power_count;
2559 for (i = 0; i < power_count; i++)
2560 prw->power_res[i] = res->Package.Elements[i];
2563 if (prw_buffer.Pointer != NULL)
2564 AcpiOsFree(prw_buffer.Pointer);
2569 * ACPI Event Handlers
2572 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2575 acpi_system_eventhandler_sleep(void *arg, int state)
2578 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2580 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
2581 acpi_SetSleepState((struct acpi_softc *)arg, state);
2587 acpi_system_eventhandler_wakeup(void *arg, int state)
2590 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2592 /* Currently, nothing to do for wakeup. */
2598 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2601 acpi_event_power_button_sleep(void *context)
2603 struct acpi_softc *sc = (struct acpi_softc *)context;
2605 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2607 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2609 return_VALUE (ACPI_INTERRUPT_HANDLED);
2613 acpi_event_power_button_wake(void *context)
2615 struct acpi_softc *sc = (struct acpi_softc *)context;
2617 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2619 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2621 return_VALUE (ACPI_INTERRUPT_HANDLED);
2625 acpi_event_sleep_button_sleep(void *context)
2627 struct acpi_softc *sc = (struct acpi_softc *)context;
2629 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2631 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
2633 return_VALUE (ACPI_INTERRUPT_HANDLED);
2637 acpi_event_sleep_button_wake(void *context)
2639 struct acpi_softc *sc = (struct acpi_softc *)context;
2641 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2643 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
2645 return_VALUE (ACPI_INTERRUPT_HANDLED);
2649 * XXX This static buffer is suboptimal. There is no locking so only
2650 * use this for single-threaded callers.
2653 acpi_name(ACPI_HANDLE handle)
2656 static char data[256];
2658 buf.Length = sizeof(data);
2661 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
2663 return ("(unknown)");
2667 * Debugging/bug-avoidance. Avoid trying to fetch info on various
2668 * parts of the namespace.
2671 acpi_avoid(ACPI_HANDLE handle)
2673 char *cp, *env, *np;
2676 np = acpi_name(handle);
2679 if ((env = getenv("debug.acpi.avoid")) == NULL)
2682 /* Scan the avoid list checking for a match */
2685 while (*cp != 0 && isspace(*cp))
2690 while (cp[len] != 0 && !isspace(cp[len]))
2692 if (!strncmp(cp, np, len)) {
2704 * Debugging/bug-avoidance. Disable ACPI subsystem components.
2707 acpi_disabled(char *subsys)
2712 if ((env = getenv("debug.acpi.disabled")) == NULL)
2714 if (strcmp(env, "all") == 0) {
2719 /* Scan the disable list, checking for a match. */
2722 while (*cp != '\0' && isspace(*cp))
2727 while (cp[len] != '\0' && !isspace(cp[len]))
2729 if (strncmp(cp, subsys, len) == 0) {
2741 * Control interface.
2743 * We multiplex ioctls for all participating ACPI devices here. Individual
2744 * drivers wanting to be accessible via /dev/acpi should use the
2745 * register/deregister interface to make their handlers visible.
2747 struct acpi_ioctl_hook
2749 TAILQ_ENTRY(acpi_ioctl_hook) link;
2755 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
2756 static int acpi_ioctl_hooks_initted;
2759 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
2761 struct acpi_ioctl_hook *hp;
2763 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
2770 if (acpi_ioctl_hooks_initted == 0) {
2771 TAILQ_INIT(&acpi_ioctl_hooks);
2772 acpi_ioctl_hooks_initted = 1;
2774 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
2781 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
2783 struct acpi_ioctl_hook *hp;
2786 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
2787 if (hp->cmd == cmd && hp->fn == fn)
2791 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
2792 free(hp, M_ACPIDEV);
2798 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td)
2804 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
2810 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
2812 struct acpi_softc *sc;
2813 struct acpi_ioctl_hook *hp;
2821 * Scan the list of registered ioctls, looking for handlers.
2824 if (acpi_ioctl_hooks_initted)
2825 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
2831 return (hp->fn(cmd, addr, hp->arg));
2834 * Core ioctls are not permitted for non-writable user.
2835 * Currently, other ioctls just fetch information.
2836 * Not changing system behavior.
2838 if ((flag & FWRITE) == 0)
2841 /* Core system ioctls. */
2843 case ACPIIO_SETSLPSTATE:
2845 state = *(int *)addr;
2846 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
2847 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state)))
2859 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2863 UINT8 state, TypeA, TypeB;
2865 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
2866 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++)
2867 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
2868 sbuf_printf(&sb, "S%d ", state);
2871 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
2877 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2879 char sleep_state[10];
2881 u_int new_state, old_state;
2883 old_state = *(u_int *)oidp->oid_arg1;
2884 if (old_state > ACPI_S_STATES_MAX + 1)
2885 strlcpy(sleep_state, "unknown", sizeof(sleep_state));
2887 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state));
2888 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
2889 if (error == 0 && req->newptr != NULL) {
2890 new_state = ACPI_STATE_S0;
2891 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++)
2892 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0)
2894 if (new_state <= ACPI_S_STATES_MAX + 1) {
2895 if (new_state != old_state)
2896 *(u_int *)oidp->oid_arg1 = new_state;
2904 /* Inform devctl(4) when we receive a Notify. */
2906 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
2908 char notify_buf[16];
2909 ACPI_BUFFER handle_buf;
2912 if (subsystem == NULL)
2915 handle_buf.Pointer = NULL;
2916 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
2917 status = AcpiNsHandleToPathname(h, &handle_buf);
2918 if (ACPI_FAILURE(status))
2920 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
2921 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
2922 AcpiOsFree(handle_buf.Pointer);
2927 * Support for parsing debug options from the kernel environment.
2929 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
2930 * by specifying the names of the bits in the debug.acpi.layer and
2931 * debug.acpi.level environment variables. Bits may be unset by
2932 * prefixing the bit name with !.
2940 static struct debugtag dbg_layer[] = {
2941 {"ACPI_UTILITIES", ACPI_UTILITIES},
2942 {"ACPI_HARDWARE", ACPI_HARDWARE},
2943 {"ACPI_EVENTS", ACPI_EVENTS},
2944 {"ACPI_TABLES", ACPI_TABLES},
2945 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
2946 {"ACPI_PARSER", ACPI_PARSER},
2947 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
2948 {"ACPI_EXECUTER", ACPI_EXECUTER},
2949 {"ACPI_RESOURCES", ACPI_RESOURCES},
2950 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
2951 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
2952 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
2953 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
2955 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
2956 {"ACPI_BATTERY", ACPI_BATTERY},
2957 {"ACPI_BUS", ACPI_BUS},
2958 {"ACPI_BUTTON", ACPI_BUTTON},
2959 {"ACPI_EC", ACPI_EC},
2960 {"ACPI_FAN", ACPI_FAN},
2961 {"ACPI_POWERRES", ACPI_POWERRES},
2962 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
2963 {"ACPI_THERMAL", ACPI_THERMAL},
2964 {"ACPI_TIMER", ACPI_TIMER},
2965 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
2969 static struct debugtag dbg_level[] = {
2970 {"ACPI_LV_ERROR", ACPI_LV_ERROR},
2971 {"ACPI_LV_WARN", ACPI_LV_WARN},
2972 {"ACPI_LV_INIT", ACPI_LV_INIT},
2973 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
2974 {"ACPI_LV_INFO", ACPI_LV_INFO},
2975 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
2977 /* Trace verbosity level 1 [Standard Trace Level] */
2978 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
2979 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
2980 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
2981 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
2982 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
2983 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
2984 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
2985 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
2986 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
2987 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
2988 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
2989 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
2990 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
2991 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
2992 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
2994 /* Trace verbosity level 2 [Function tracing and memory allocation] */
2995 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
2996 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
2997 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
2998 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
2999 {"ACPI_LV_ALL", ACPI_LV_ALL},
3001 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3002 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3003 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3004 {"ACPI_LV_IO", ACPI_LV_IO},
3005 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3006 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3008 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3009 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3010 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3011 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3012 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3013 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3018 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3030 while (*ep && !isspace(*ep))
3041 for (i = 0; tag[i].name != NULL; i++) {
3042 if (!strncmp(cp, tag[i].name, l)) {
3044 *flag |= tag[i].value;
3046 *flag &= ~tag[i].value;
3054 acpi_set_debugging(void *junk)
3056 char *layer, *level;
3063 layer = getenv("debug.acpi.layer");
3064 level = getenv("debug.acpi.level");
3065 if (layer == NULL && level == NULL)
3068 printf("ACPI set debug");
3069 if (layer != NULL) {
3070 if (strcmp("NONE", layer) != 0)
3071 printf(" layer '%s'", layer);
3072 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3075 if (level != NULL) {
3076 if (strcmp("NONE", level) != 0)
3077 printf(" level '%s'", level);
3078 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3084 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3088 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3091 struct debugtag *tag;
3094 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3096 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3097 tag = &dbg_layer[0];
3098 dbg = &AcpiDbgLayer;
3100 tag = &dbg_level[0];
3101 dbg = &AcpiDbgLevel;
3104 /* Get old values if this is a get request. */
3105 ACPI_SERIAL_BEGIN(acpi);
3107 sbuf_cpy(&sb, "NONE");
3108 } else if (req->newptr == NULL) {
3109 for (; tag->name != NULL; tag++) {
3110 if ((*dbg & tag->value) == tag->value)
3111 sbuf_printf(&sb, "%s ", tag->name);
3117 /* Copy out the old values to the user. */
3118 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3121 /* If the user is setting a string, parse it. */
3122 if (error == 0 && req->newptr != NULL) {
3124 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3125 acpi_set_debugging(NULL);
3127 ACPI_SERIAL_END(acpi);
3132 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3133 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3134 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3135 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3136 #endif /* ACPI_DEBUG */
3139 acpi_pm_func(u_long cmd, void *arg, ...)
3141 int state, acpi_state;
3143 struct acpi_softc *sc;
3148 case POWER_CMD_SUSPEND:
3149 sc = (struct acpi_softc *)arg;
3156 state = va_arg(ap, int);
3160 case POWER_SLEEP_STATE_STANDBY:
3161 acpi_state = sc->acpi_standby_sx;
3163 case POWER_SLEEP_STATE_SUSPEND:
3164 acpi_state = sc->acpi_suspend_sx;
3166 case POWER_SLEEP_STATE_HIBERNATE:
3167 acpi_state = ACPI_STATE_S4;
3174 acpi_SetSleepState(sc, acpi_state);
3186 acpi_pm_register(void *arg)
3188 if (!cold || resource_disabled("acpi", 0))
3191 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3194 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);