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 1.157 2004/06/05 09:56:04 njl Exp $
30 * $DragonFly: src/sys/dev/acpica5/acpi.c,v 1.31 2007/04/30 07:18:47 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/device.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 <sys/thread2.h>
54 #include <machine/clock.h>
55 #include <machine/globaldata.h>
56 #include <bus/isa/isavar.h>
59 #include <dev/acpica5/acpivar.h>
60 #include <dev/acpica5/acpiio.h>
63 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
65 /* Hooks for the ACPI CA debugging infrastructure */
66 #define _COMPONENT ACPI_BUS
67 ACPI_MODULE_NAME("ACPI")
69 static d_open_t acpiopen;
70 static d_close_t acpiclose;
71 static d_ioctl_t acpiioctl;
73 #define CDEV_MAJOR 152
74 static struct dev_ops acpi_ops = {
75 { "acpi", CDEV_MAJOR, 0 },
81 #if __FreeBSD_version >= 500000
82 struct mtx acpi_mutex;
91 #define ACPI_OEM_REV_ANY 0
93 static struct acpi_quirks acpi_quirks_table[] = {
95 /* Bad PCI routing table. Used on some SuperMicro boards. */
96 { "PTLTD ", 0x06040000, "pci_link" },
98 #ifdef ACPI_QUIRK_VMWARE
100 * VMware's ACPI-fast24 timer runs roughly 65 times too fast, and not
101 * predictably/monotonic either. This is observed at least under SMP
104 * NOTE: this combination of OemId and OemRevision is NOT unique; it is
105 * known or suspected that at least some SuperMicro boards (see above) and
106 * the Compaq Presario 1952 use this combination. That's why this quirks
107 * entry is guarded by an #ifdef, and associated config option.
109 { "PTLTD ", 0x06040000, "timer" },
110 #endif /* ACPI_QUIRK_VMWARE */
114 static int acpi_modevent(struct module *mod, int event, void *junk);
115 static int acpi_identify(driver_t *driver, device_t parent);
116 static int acpi_probe(device_t dev);
117 static int acpi_attach(device_t dev);
118 static int acpi_shutdown(device_t dev);
119 static void acpi_quirks_set(void);
120 static device_t acpi_add_child(device_t bus, device_t parent, int order,
121 const char *name, int unit);
122 static int acpi_print_child(device_t bus, device_t child);
123 static int acpi_read_ivar(device_t dev, device_t child, int index,
125 static int acpi_write_ivar(device_t dev, device_t child, int index,
127 static int acpi_set_resource(device_t dev, device_t child, int type,
128 int rid, u_long start, u_long count);
129 static int acpi_get_resource(device_t dev, device_t child, int type,
130 int rid, u_long *startp, u_long *countp);
131 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
132 int type, int *rid, u_long start, u_long end,
133 u_long count, u_int flags);
134 static int acpi_release_resource(device_t bus, device_t child, int type,
135 int rid, struct resource *r);
136 static uint32_t acpi_isa_get_logicalid(device_t dev);
137 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
138 static int acpi_isa_pnp_probe(device_t bus, device_t child,
139 struct isa_pnp_id *ids);
140 static void acpi_probe_children(device_t bus);
141 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
142 void *context, void **status);
143 static void acpi_shutdown_pre_sync(void *arg, int howto);
144 static void acpi_shutdown_final(void *arg, int howto);
145 static void acpi_shutdown_poweroff(void *arg);
146 static void acpi_enable_fixed_events(struct acpi_softc *sc);
147 static int acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw);
148 static ACPI_STATUS acpi_wake_limit(ACPI_HANDLE h, UINT32 level, void *context,
150 static int acpi_wake_limit_walk(int sstate);
151 static int acpi_wake_sysctl_walk(device_t dev);
153 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
155 static void acpi_system_eventhandler_sleep(void *arg, int state);
156 static void acpi_system_eventhandler_wakeup(void *arg, int state);
157 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
158 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
159 static int acpi_pm_func(u_long cmd, void *arg, ...);
160 static int acpi_child_location_str_method(device_t acdev, device_t child,
161 char *buf, size_t buflen);
162 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
163 char *buf, size_t buflen);
165 static device_method_t acpi_methods[] = {
166 /* Device interface */
167 DEVMETHOD(device_identify, acpi_identify),
168 DEVMETHOD(device_probe, acpi_probe),
169 DEVMETHOD(device_attach, acpi_attach),
170 DEVMETHOD(device_shutdown, acpi_shutdown),
171 DEVMETHOD(device_detach, bus_generic_detach),
172 DEVMETHOD(device_suspend, bus_generic_suspend),
173 DEVMETHOD(device_resume, bus_generic_resume),
176 DEVMETHOD(bus_add_child, acpi_add_child),
177 DEVMETHOD(bus_print_child, acpi_print_child),
178 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
179 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
180 DEVMETHOD(bus_set_resource, acpi_set_resource),
181 DEVMETHOD(bus_get_resource, acpi_get_resource),
182 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
183 DEVMETHOD(bus_release_resource, acpi_release_resource),
184 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
185 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
186 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
187 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
188 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
189 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
190 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
193 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
198 static driver_t acpi_driver = {
201 sizeof(struct acpi_softc),
204 static devclass_t acpi_devclass;
205 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
206 MODULE_VERSION(acpi, 1);
208 static const char* sleep_state_names[] = {
209 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
211 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging");
212 static char acpi_ca_version[12];
213 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
214 acpi_ca_version, 0, "Version of Intel ACPI-CA");
217 * Allow override of whether methods execute in parallel or not.
218 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
219 * errors for AML that really can't handle parallel method execution.
220 * It is off by default since this breaks recursive methods and
221 * some IBMs use such code.
223 static int acpi_serialize_methods;
224 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
227 * ACPI can only be loaded as a module by the loader; activating it after
228 * system bootstrap time is not useful, and can be fatal to the system.
229 * It also cannot be unloaded, since the entire system bus heirarchy hangs
233 acpi_modevent(struct module *mod, int event, void *junk)
238 kprintf("The ACPI driver cannot be loaded after boot.\n");
243 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
253 * Perform early initialization.
261 static int error, started = 0;
263 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
266 return_VALUE (error);
269 /* Start up the ACPI CA subsystem. */
271 debugpoint = kgetenv("debug.acpi.debugger");
273 if (!strcmp(debugpoint, "init"))
274 acpi_EnterDebugger();
278 error = AcpiInitializeTables(NULL, 16, TRUE);
279 if (ACPI_FAILURE(error)) {
280 kprintf("ACPI: table initialization failed:\n");
281 return_VALUE (error);
284 /* Set up any quirks we have for this XSDT. */
286 if (acpi_disabled("acpi"))
287 return_VALUE (AE_ERROR);
289 return_VALUE (AE_OK);
293 * Detect ACPI, perform early initialisation
296 acpi_identify(driver_t *driver, device_t parent)
301 * No sense rescanning an ACPI 'bus'.
303 if (device_get_state(parent) == DS_ATTACHED)
306 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
311 /* Check that we haven't been disabled with a hint. */
312 if (resource_disabled("acpi", 0))
315 /* Make sure we're not being doubly invoked. */
316 if (device_find_child(parent, "acpi", 0) != NULL)
319 /* Initialize ACPI-CA. */
320 if (ACPI_FAILURE(acpi_Startup()))
323 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION);
325 /* Attach the actual ACPI device. */
326 if ((child = BUS_ADD_CHILD(parent, parent, 0, "acpi", 0)) == NULL) {
327 device_printf(parent, "ACPI: could not attach\n");
334 * Get a mapping of the root table header, as ACPICA code no longer
335 * keeps local copy of RSDT/XSDT
337 * return value: if non-NULL, mapped physical address of root table header.
338 * caller is supposed to unmap the region by AcpiOsUnmapMemory()
340 static ACPI_TABLE_HEADER *
341 acpi_map_rsdt_header(void)
343 ACPI_PHYSICAL_ADDRESS rsdp_addr, addr;
344 ACPI_TABLE_RSDP *rsdp;
346 if ((rsdp_addr = AcpiOsGetRootPointer()) == NULL)
348 if ((rsdp = AcpiOsMapMemory(rsdp_addr, sizeof(*rsdp))) == NULL)
350 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress)
351 addr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
353 addr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
354 AcpiOsUnmapMemory(rsdp, sizeof(*rsdp));
356 return AcpiOsMapMemory(addr, sizeof(ACPI_TABLE_HEADER));
360 * Fetch some descriptive data from ACPI to put in our attach message
363 acpi_probe(device_t dev)
365 ACPI_TABLE_HEADER *th;
371 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
373 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
374 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
376 device_printf(dev, "Other PM system enabled.\n");
382 th = acpi_map_rsdt_header();
384 device_printf(dev, "couldn't get RSDT header\n");
389 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
390 sbuf_bcat(&sb, th->OemId, 6);
393 sbuf_bcat(&sb, th->OemTableId, 8);
396 device_set_desc_copy(dev, sbuf_data(&sb));
398 AcpiOsUnmapMemory(th, sizeof(*th));
406 acpi_attach(device_t dev)
408 struct acpi_softc *sc;
414 ACPI_TABLE_FACS *facsp;
420 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
421 #if __FreeBSD_version >= 500000
422 /* Initialise the ACPI mutex */
423 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
427 sc = device_get_softc(dev);
428 bzero(sc, sizeof(*sc));
430 callout_init(&sc->acpi_sleep_timer);
432 if ((error = acpi_task_thread_init())) {
433 device_printf(dev, "Could not start task thread.\n");
438 * Set the globals from our tunables. This is needed because ACPI-CA
439 * uses UINT8 for some values and we have no tunable_byte.
441 AcpiGbl_AllMethodsSerialized = (UINT8)acpi_serialize_methods;
442 AcpiGbl_EnableInterpreterSlack = TRUE;
446 debugpoint = kgetenv("debug.acpi.debugger");
448 if (!strcmp(debugpoint, "tables"))
449 acpi_EnterDebugger();
454 if (ACPI_FAILURE(status = AcpiInitializeSubsystem())) {
455 kprintf("ACPI: initialisation failed: %s\n",
456 AcpiFormatException(status));
459 if (ACPI_FAILURE(status = AcpiLoadTables())) {
460 kprintf("ACPI: table load failed: %s\n", AcpiFormatException(status));
465 debugpoint = kgetenv("debug.acpi.debugger");
467 if (!strcmp(debugpoint, "spaces"))
468 acpi_EnterDebugger();
472 /* Install the default address space handlers. */
473 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
474 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL);
475 if (ACPI_FAILURE(status)) {
476 device_printf(dev, "Could not initialise SystemMemory handler: %s\n",
477 AcpiFormatException(status));
480 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
481 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL);
482 if (ACPI_FAILURE(status)) {
483 device_printf(dev, "Could not initialise SystemIO handler: %s\n",
484 AcpiFormatException(status));
487 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
488 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
489 if (ACPI_FAILURE(status)) {
490 device_printf(dev, "could not initialise PciConfig handler: %s\n",
491 AcpiFormatException(status));
496 * Bring ACPI fully online.
498 * Note that some systems (specifically, those with namespace evaluation
499 * issues that require the avoidance of parts of the namespace) must
500 * avoid running _INI and _STA on everything, as well as dodging the final
503 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
504 * For avoiding portions of the namespace without totally disabling _INI
505 * and _STA, use "debug.acpi.avoid.paths".
507 * XXX We should arrange for the object init pass after we have attached
508 * all our child devices, but on many systems it works here.
511 debugpoint = kgetenv("debug.acpi.debugger");
513 if (!strcmp(debugpoint, "enable"))
514 acpi_EnterDebugger();
519 if (testenv("debug.acpi.avoid"))
520 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
521 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
522 device_printf(dev, "Could not enable ACPI: %s\n",
523 AcpiFormatException(status));
528 * Call the ECDT probe function to provide EC functionality before
529 * the namespace has been evaluated.
531 acpi_ec_ecdt_probe(dev);
533 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
534 device_printf(dev, "Could not initialize ACPI objects: %s\n",
535 AcpiFormatException(status));
540 * Setup our sysctl tree.
542 * XXX: This doesn't check to make sure that none of these fail.
544 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
545 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
546 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
547 device_get_name(dev), CTLFLAG_RD, 0, "");
548 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
549 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
550 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
551 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
552 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
553 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
554 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
555 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
556 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
557 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
558 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
559 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
561 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
562 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
564 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
565 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
566 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
567 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW,
568 &sc->acpi_sleep_delay, 0, "sleep delay");
569 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
570 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW,
571 &sc->acpi_s4bios, 0, "S4BIOS mode");
572 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW,
574 &sc->acpi_verbose, 0, "verbose mode");
575 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
576 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW,
577 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff");
580 * Default to 1 second before sleeping to give some machines time to
583 sc->acpi_sleep_delay = 1;
584 sc->acpi_disable_on_poweroff = 0;
586 sc->acpi_verbose = 1;
587 if ((env = kgetenv("hw.acpi.verbose")) && strcmp(env, "0")) {
588 sc->acpi_verbose = 1;
592 /* Only enable S4BIOS by default if the FACS says it is available. */
593 status = AcpiGetTableByIndex(ACPI_TABLE_INDEX_FACS,
594 (ACPI_TABLE_HEADER **)&facsp);
595 if (ACPI_SUCCESS(status)) {
596 if ((facsp->Flags & ACPI_FACS_S4_BIOS_PRESENT) != 0)
601 * Dispatch the default sleep state to devices. The lid switch is set
602 * to NONE by default to avoid surprising users.
604 sc->acpi_power_button_sx = ACPI_STATE_S5;
605 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1;
606 sc->acpi_standby_sx = ACPI_STATE_S1;
607 sc->acpi_suspend_sx = ACPI_STATE_S3;
609 /* Pick the first valid sleep state for the sleep button default. */
610 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1;
611 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++)
612 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
613 sc->acpi_sleep_button_sx = state;
617 acpi_enable_fixed_events(sc);
620 * Scan the namespace and attach/initialise children.
623 debugpoint = kgetenv("debug.acpi.debugger");
625 if (!strcmp(debugpoint, "probe"))
626 acpi_EnterDebugger();
631 /* Register our shutdown handlers */
632 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc,
634 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
638 * Register our acpi event handlers.
639 * XXX should be configurable eg. via userland policy manager.
641 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
642 sc, ACPI_EVENT_PRI_LAST);
643 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
644 sc, ACPI_EVENT_PRI_LAST);
646 /* Flag our initial states. */
647 sc->acpi_enabled = 1;
648 sc->acpi_sstate = ACPI_STATE_S0;
649 sc->acpi_sleep_disabled = 0;
651 /* Create the control device */
652 dev_ops_add(&acpi_ops, 0, 0);
653 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644,
655 sc->acpi_dev_t->si_drv1 = sc;
658 debugpoint = kgetenv("debug.acpi.debugger");
660 if (strcmp(debugpoint, "running") == 0)
661 acpi_EnterDebugger();
666 if ((error = acpi_machdep_init(dev)))
669 /* Register ACPI again to pass the correct argument of pm_func. */
670 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
672 if (!acpi_disabled("bus"))
673 acpi_probe_children(dev);
679 return_VALUE (error);
683 acpi_shutdown(device_t dev)
685 /* Allow children to shutdown first. */
686 bus_generic_shutdown(dev);
688 /* Disable all wake GPEs not appropriate for reboot/poweroff. */
689 acpi_wake_limit_walk(ACPI_STATE_S5);
694 acpi_quirks_set(void)
696 ACPI_TABLE_HEADER *rsdt;
697 struct acpi_quirks *quirk;
702 * If the user loaded a custom table or disabled "quirks", leave
703 * the settings alone.
706 if ((env = kgetenv("acpi_dsdt_load")) != NULL) {
707 /* XXX No strcasecmp but this is good enough. */
708 if (*env == 'Y' || *env == 'y')
712 if ((env = kgetenv("debug.acpi.disabled")) != NULL) {
713 if (strstr("quirks", env) != NULL)
719 * Search through our quirk table and concatenate the disabled
720 * values with whatever we find.
722 if ((rsdt = acpi_map_rsdt_header()) == NULL)
724 for (quirk = acpi_quirks_table; quirk->OemId; quirk++) {
725 if (!strncmp(rsdt->OemId, quirk->OemId, strlen(quirk->OemId)) &&
726 (rsdt->OemRevision == quirk->OemRevision ||
727 quirk->OemRevision == ACPI_OEM_REV_ANY)) {
728 len += strlen(quirk->value) + 2;
729 if ((tmp = kmalloc(len, M_TEMP, M_NOWAIT)) == NULL)
731 ksprintf(tmp, "%s %s", env ? env : "", quirk->value);
732 ksetenv("debug.acpi.disabled", tmp);
737 AcpiOsUnmapMemory(rsdt, sizeof(*rsdt));
745 * Handle a new device being added
748 acpi_add_child(device_t bus, device_t parent, int order,
749 const char *name, int unit)
751 struct acpi_device *ad;
754 ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_INTWAIT | M_ZERO);
756 resource_list_init(&ad->ad_rl);
758 child = device_add_child_ordered(parent, order, name, unit);
760 device_set_ivars(child, ad);
765 acpi_print_child(device_t bus, device_t child)
767 struct acpi_device *adev = device_get_ivars(child);
768 struct resource_list *rl = &adev->ad_rl;
771 retval += bus_print_child_header(bus, child);
772 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
773 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
774 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
775 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
776 retval += bus_print_child_footer(bus, child);
781 /* Location hint for devctl(8) */
783 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
786 struct acpi_device *dinfo = device_get_ivars(child);
788 if (dinfo->ad_handle)
789 ksnprintf(buf, buflen, "path=%s", acpi_name(dinfo->ad_handle));
791 ksnprintf(buf, buflen, "magic=unknown");
795 /* PnP information for devctl(8) */
797 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
800 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL};
801 ACPI_DEVICE_INFO *adinfo;
802 struct acpi_device *dinfo = device_get_ivars(child);
806 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf);
807 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer;
810 ksnprintf(buf, buflen, "Unknown");
812 ksnprintf(buf, buflen, "_HID=%s _UID=%lu",
813 (adinfo->Valid & ACPI_VALID_HID) ?
814 adinfo->HardwareId.Value : "UNKNOWN",
815 (adinfo->Valid & ACPI_VALID_UID) ?
816 strtoul(adinfo->UniqueId.Value, &end, 10) : 0);
825 * Handle per-device ivars
828 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
830 struct acpi_device *ad;
832 if ((ad = device_get_ivars(child)) == NULL) {
833 kprintf("device has no ivars\n");
837 /* ACPI and ISA compatibility ivars */
839 case ACPI_IVAR_HANDLE:
840 *(ACPI_HANDLE *)result = ad->ad_handle;
842 case ACPI_IVAR_MAGIC:
843 *(int *)result = ad->ad_magic;
845 case ACPI_IVAR_PRIVATE:
846 *(void **)result = ad->ad_private;
848 case ISA_IVAR_VENDORID:
849 case ISA_IVAR_SERIAL:
850 case ISA_IVAR_COMPATID:
853 case ISA_IVAR_LOGICALID:
854 *(int *)result = acpi_isa_get_logicalid(child);
864 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
866 struct acpi_device *ad;
868 if ((ad = device_get_ivars(child)) == NULL) {
869 kprintf("device has no ivars\n");
874 case ACPI_IVAR_HANDLE:
875 ad->ad_handle = (ACPI_HANDLE)value;
877 case ACPI_IVAR_MAGIC:
878 ad->ad_magic = (int)value;
880 case ACPI_IVAR_PRIVATE:
881 ad->ad_private = (void *)value;
884 panic("bad ivar write request (%d)", index);
892 * Handle child resource allocation/removal
895 acpi_set_resource(device_t dev, device_t child, int type, int rid,
896 u_long start, u_long count)
898 struct acpi_device *ad = device_get_ivars(child);
899 struct resource_list *rl = &ad->ad_rl;
901 resource_list_add(rl, type, rid, start, start + count -1, count);
907 acpi_get_resource(device_t dev, device_t child, int type, int rid,
908 u_long *startp, u_long *countp)
910 struct acpi_device *ad = device_get_ivars(child);
911 struct resource_list *rl = &ad->ad_rl;
912 struct resource_list_entry *rle;
914 rle = resource_list_find(rl, type, rid);
919 *startp = rle->start;
921 *countp = rle->count;
926 static struct resource *
927 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
928 u_long start, u_long end, u_long count, u_int flags)
930 struct acpi_device *ad = device_get_ivars(child);
931 struct resource_list *rl = &ad->ad_rl;
933 return (resource_list_alloc(rl, bus, child, type, rid, start, end, count,
938 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r)
940 struct acpi_device *ad = device_get_ivars(child);
941 struct resource_list *rl = &ad->ad_rl;
943 return (resource_list_release(rl, bus, child, type, rid, r));
946 /* Allocate an IO port or memory resource, given its GAS. */
948 acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas)
952 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || gas->BitWidth < 8)
955 switch (gas->SpaceId) {
956 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
957 type = SYS_RES_MEMORY;
959 case ACPI_ADR_SPACE_SYSTEM_IO:
960 type = SYS_RES_IOPORT;
966 bus_set_resource(dev, type, *rid, gas->Address, gas->BitWidth / 8);
967 return (bus_alloc_resource_any(dev, type, rid, RF_ACTIVE));
971 * Handle ISA-like devices probing for a PnP ID to match.
973 #define PNP_EISAID(s) \
974 ((((s[0] - '@') & 0x1f) << 2) \
975 | (((s[1] - '@') & 0x18) >> 3) \
976 | (((s[1] - '@') & 0x07) << 13) \
977 | (((s[2] - '@') & 0x1f) << 8) \
978 | (PNP_HEXTONUM(s[4]) << 16) \
979 | (PNP_HEXTONUM(s[3]) << 20) \
980 | (PNP_HEXTONUM(s[6]) << 24) \
981 | (PNP_HEXTONUM(s[5]) << 28))
984 acpi_isa_get_logicalid(device_t dev)
986 ACPI_DEVICE_INFO *devinfo;
993 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
997 buf.Length = ACPI_ALLOCATE_BUFFER;
1001 /* Fetch and validate the HID. */
1002 if ((h = acpi_get_handle(dev)) == NULL)
1004 error = AcpiGetObjectInfo(h, &buf);
1005 if (ACPI_FAILURE(error))
1007 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1009 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
1010 pnpid = PNP_EISAID(devinfo->HardwareId.Value);
1013 if (buf.Pointer != NULL)
1014 AcpiOsFree(buf.Pointer);
1016 return_VALUE (pnpid);
1020 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1022 ACPI_DEVICE_INFO *devinfo;
1030 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1035 buf.Length = ACPI_ALLOCATE_BUFFER;
1039 /* Fetch and validate the CID */
1040 if ((h = acpi_get_handle(dev)) == NULL)
1042 error = AcpiGetObjectInfo(h, &buf);
1043 if (ACPI_FAILURE(error))
1045 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1046 if ((devinfo->Valid & ACPI_VALID_CID) == 0)
1049 if (devinfo->CompatibilityId.Count < count)
1050 count = devinfo->CompatibilityId.Count;
1051 for (i = 0; i < count; i++) {
1052 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0)
1054 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value);
1059 if (buf.Pointer != NULL)
1060 AcpiOsFree(buf.Pointer);
1062 return_VALUE (valid);
1066 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1068 int result, cid_count, i;
1069 uint32_t lid, cids[8];
1071 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1074 * ISA-style drivers attached to ACPI may persist and
1075 * probe manually if we return ENOENT. We never want
1076 * that to happen, so don't ever return it.
1080 /* Scan the supplied IDs for a match */
1081 lid = acpi_isa_get_logicalid(child);
1082 cid_count = acpi_isa_get_compatid(child, cids, 8);
1083 while (ids && ids->ip_id) {
1084 if (lid == ids->ip_id) {
1088 for (i = 0; i < cid_count; i++) {
1089 if (cids[i] == ids->ip_id) {
1098 return_VALUE (result);
1102 * Scan relevant portions of the ACPI namespace and attach child devices.
1104 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and
1105 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec.
1108 acpi_probe_children(device_t bus)
1112 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL};
1115 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1118 /* Create any static children by calling device identify methods. */
1119 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1120 bus_generic_probe(bus);
1123 * Scan the namespace and insert placeholders for all the devices that
1126 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1127 * we want to create nodes for all devices, not just those that are
1128 * currently present. (This assumes that we don't want to create/remove
1129 * devices as they appear, which might be smarter.)
1131 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1132 for (i = 0; scopes[i] != NULL; i++) {
1133 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent);
1134 if (ACPI_SUCCESS(status)) {
1135 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child,
1141 * Scan all of the child devices we have created and let them probe/attach.
1143 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
1144 bus_generic_attach(bus);
1147 * Some of these children may have attached others as part of their attach
1148 * process (eg. the root PCI bus driver), so rescan.
1150 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
1151 bus_generic_attach(bus);
1153 /* Attach wake sysctls. */
1154 acpi_wake_sysctl_walk(bus);
1156 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1161 * Evaluate a child device and determine whether we might attach a device to
1165 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1167 ACPI_OBJECT_TYPE type;
1168 device_t child, bus = (device_t)context;
1170 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1172 /* Skip this device if we think we'll have trouble with it. */
1173 if (acpi_avoid(handle)) {
1174 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "not scanning '%s'\n",
1175 acpi_name(handle)));
1176 return_ACPI_STATUS (AE_OK);
1179 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1181 case ACPI_TYPE_DEVICE:
1182 case ACPI_TYPE_PROCESSOR:
1183 case ACPI_TYPE_THERMAL:
1184 case ACPI_TYPE_POWER:
1185 if (acpi_disabled("children"))
1189 * Create a placeholder device for this node. Sort the placeholder
1190 * so that the probe/attach passes will run breadth-first.
1192 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n",
1193 acpi_name(handle)));
1194 child = BUS_ADD_CHILD(bus, bus, level * 10, NULL, -1);
1197 acpi_set_handle(child, handle);
1199 /* Check if the device can generate wake events. */
1200 if (ACPI_SUCCESS(AcpiEvaluateObject(handle, "_PRW", NULL, NULL)))
1201 device_set_flags(child, ACPI_FLAG_WAKE_CAPABLE);
1204 * Check that the device is present. If it's not present,
1205 * leave it disabled (so that we have a device_t attached to
1206 * the handle, but we don't probe it).
1208 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1209 device_disable(child);
1214 * Get the device's resource settings and attach them.
1215 * Note that if the device has _PRS but no _CRS, we need
1216 * to decide when it's appropriate to try to configure the
1217 * device. Ignore the return value here; it's OK for the
1218 * device not to have any resources.
1220 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1222 /* If we're debugging, probe/attach now rather than later */
1223 ACPI_DEBUG_EXEC(device_probe_and_attach(child));
1228 return_ACPI_STATUS (AE_OK);
1232 acpi_shutdown_pre_sync(void *arg, int howto)
1234 struct acpi_softc *sc = arg;
1239 * Disable all ACPI events before soft off, otherwise the system
1240 * will be turned on again on some laptops.
1242 * XXX this should probably be restricted to masking some events just
1243 * before powering down, since we may still need ACPI during the
1246 if (sc->acpi_disable_on_poweroff)
1251 acpi_shutdown_final(void *arg, int howto)
1257 * If powering off, run the actual shutdown code on each processor.
1258 * It will only perform the shutdown on the BSP. Some chipsets do
1259 * not power off the system correctly if called from an AP.
1261 if ((howto & RB_POWEROFF) != 0) {
1262 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1263 if (ACPI_FAILURE(status)) {
1264 kprintf("AcpiEnterSleepStatePrep failed - %s\n",
1265 AcpiFormatException(status));
1268 kprintf("Powering system off using ACPI\n");
1269 acpi_shutdown_poweroff(NULL);
1271 kprintf("Shutting down ACPI\n");
1277 * Since this function may be called with locks held or in an unknown
1278 * context, it cannot allocate memory, acquire locks, sleep, etc.
1281 acpi_shutdown_poweroff(void *arg)
1287 /* Only attempt to power off if this is the BSP (cpuid 0). */
1288 if (mdcpu->mi.gd_cpuid != 0)
1291 ACPI_DISABLE_IRQS();
1292 status = AcpiEnterSleepState(ACPI_STATE_S5);
1293 if (ACPI_FAILURE(status)) {
1294 kprintf("ACPI power-off failed - %s\n", AcpiFormatException(status));
1297 kprintf("ACPI power-off failed - timeout\n");
1302 acpi_enable_fixed_events(struct acpi_softc *sc)
1304 static int first_time = 1;
1308 /* Enable and clear fixed events and install handlers. */
1309 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
1310 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1311 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1312 acpi_event_power_button_sleep, sc);
1314 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1316 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
1317 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1318 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1319 acpi_event_sleep_button_sleep, sc);
1321 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1328 * Returns true if the device is actually present and should
1329 * be attached to. This requires the present, enabled, UI-visible
1330 * and diagnostics-passed bits to be set.
1333 acpi_DeviceIsPresent(device_t dev)
1335 ACPI_DEVICE_INFO *devinfo;
1344 if ((h = acpi_get_handle(dev)) == NULL)
1347 buf.Length = ACPI_ALLOCATE_BUFFER;
1348 error = AcpiGetObjectInfo(h, &buf);
1349 if (ACPI_FAILURE(error))
1351 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1353 /* If no _STA method, must be present */
1354 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1357 /* Return true for 'present' and 'functioning' */
1358 if ((devinfo->CurrentStatus & 0x9) == 0x9)
1361 AcpiOsFree(buf.Pointer);
1366 * Returns true if the battery is actually present and inserted.
1369 acpi_BatteryIsPresent(device_t dev)
1371 ACPI_DEVICE_INFO *devinfo;
1380 if ((h = acpi_get_handle(dev)) == NULL)
1383 buf.Length = ACPI_ALLOCATE_BUFFER;
1384 error = AcpiGetObjectInfo(h, &buf);
1385 if (ACPI_FAILURE(error))
1387 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1389 /* If no _STA method, must be present */
1390 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1393 /* Return true for 'present' and 'functioning' */
1394 if ((devinfo->CurrentStatus & 0x19) == 0x19)
1397 AcpiOsFree(buf.Pointer);
1402 * Match a HID string against a device
1405 acpi_MatchHid(device_t dev, char *hid)
1407 ACPI_DEVICE_INFO *devinfo;
1418 if ((h = acpi_get_handle(dev)) == NULL)
1421 buf.Length = ACPI_ALLOCATE_BUFFER;
1422 error = AcpiGetObjectInfo(h, &buf);
1423 if (ACPI_FAILURE(error))
1425 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1427 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1428 strcmp(hid, devinfo->HardwareId.Value) == 0)
1430 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) {
1431 for (i = 0; i < devinfo->CompatibilityId.Count; i++) {
1432 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) {
1439 AcpiOsFree(buf.Pointer);
1444 * Return the handle of a named object within our scope, ie. that of (parent)
1445 * or one if its parents.
1448 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1455 /* Walk back up the tree to the root */
1457 status = AcpiGetHandle(parent, path, &r);
1458 if (ACPI_SUCCESS(status)) {
1462 if (status != AE_NOT_FOUND)
1464 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1465 return (AE_NOT_FOUND);
1470 /* Find the difference between two PM tick counts. */
1472 acpi_TimerDelta(uint32_t end, uint32_t start)
1477 delta = end - start;
1478 else if ((AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) == 0)
1479 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
1481 delta = ((0xFFFFFFFF - start) + end + 1);
1486 * Allocate a buffer with a preset data size.
1489 acpi_AllocBuffer(int size)
1493 buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_INTWAIT);
1495 buf->Pointer = (void *)(buf + 1);
1500 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
1503 ACPI_OBJECT_LIST args;
1507 arg1.Type = ACPI_TYPE_INTEGER;
1508 arg1.Integer.Value = number;
1510 args.Pointer = &arg1;
1512 return (AcpiEvaluateObject(handle, path, &args, NULL));
1516 * Evaluate a path that should return an integer.
1519 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
1528 handle = ACPI_ROOT_OBJECT;
1531 * Assume that what we've been pointed at is an Integer object, or
1532 * a method that will return an Integer.
1534 buf.Pointer = ¶m;
1535 buf.Length = sizeof(param);
1536 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1537 if (ACPI_SUCCESS(status)) {
1538 if (param.Type == ACPI_TYPE_INTEGER)
1539 *number = param.Integer.Value;
1545 * In some applications, a method that's expected to return an Integer
1546 * may instead return a Buffer (probably to simplify some internal
1547 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1548 * convert it into an Integer as best we can.
1552 if (status == AE_BUFFER_OVERFLOW) {
1553 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1554 status = AE_NO_MEMORY;
1556 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1557 if (ACPI_SUCCESS(status))
1558 status = acpi_ConvertBufferToInteger(&buf, number);
1559 AcpiOsFree(buf.Pointer);
1566 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
1572 p = (ACPI_OBJECT *)bufp->Pointer;
1573 if (p->Type == ACPI_TYPE_INTEGER) {
1574 *number = p->Integer.Value;
1577 if (p->Type != ACPI_TYPE_BUFFER)
1579 if (p->Buffer.Length > sizeof(int))
1580 return (AE_BAD_DATA);
1583 val = p->Buffer.Pointer;
1584 for (i = 0; i < p->Buffer.Length; i++)
1585 *number += val[i] << (i * 8);
1590 * Iterate over the elements of an a package object, calling the supplied
1591 * function for each element.
1593 * XXX possible enhancement might be to abort traversal on error.
1596 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
1597 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
1602 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
1603 return (AE_BAD_PARAMETER);
1605 /* Iterate over components */
1607 comp = pkg->Package.Elements;
1608 for (; i < pkg->Package.Count; i++, comp++)
1615 * Find the (index)th resource object in a set.
1618 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
1623 rp = (ACPI_RESOURCE *)buf->Pointer;
1627 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1628 return (AE_BAD_PARAMETER);
1630 /* Check for terminator */
1631 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
1632 return (AE_NOT_FOUND);
1633 rp = ACPI_NEXT_RESOURCE(rp);
1642 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
1644 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
1645 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
1646 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
1649 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
1652 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
1657 /* Initialise the buffer if necessary. */
1658 if (buf->Pointer == NULL) {
1659 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
1660 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
1661 return (AE_NO_MEMORY);
1662 rp = (ACPI_RESOURCE *)buf->Pointer;
1663 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
1670 * Scan the current buffer looking for the terminator.
1671 * This will either find the terminator or hit the end
1672 * of the buffer and return an error.
1674 rp = (ACPI_RESOURCE *)buf->Pointer;
1676 /* Range check, don't go outside the buffer */
1677 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1678 return (AE_BAD_PARAMETER);
1679 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
1681 rp = ACPI_NEXT_RESOURCE(rp);
1685 * Check the size of the buffer and expand if required.
1688 * size of existing resources before terminator +
1689 * size of new resource and header +
1690 * size of terminator.
1692 * Note that this loop should really only run once, unless
1693 * for some reason we are stuffing a *really* huge resource.
1695 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
1696 res->Length + ACPI_RS_SIZE_NO_DATA +
1697 ACPI_RS_SIZE_MIN) >= buf->Length) {
1698 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
1699 return (AE_NO_MEMORY);
1700 bcopy(buf->Pointer, newp, buf->Length);
1701 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
1702 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
1703 AcpiOsFree(buf->Pointer);
1704 buf->Pointer = newp;
1705 buf->Length += buf->Length;
1708 /* Insert the new resource. */
1709 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
1711 /* And add the terminator. */
1712 rp = ACPI_NEXT_RESOURCE(rp);
1713 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
1720 * Set interrupt model.
1723 acpi_SetIntrModel(int model)
1725 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
1728 #define ACPI_MINIMUM_AWAKETIME 5
1731 acpi_sleep_enable(void *arg)
1733 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
1737 * Set the system sleep state
1739 * Currently we support S1-S5 but S4 is only S4BIOS
1742 acpi_SetSleepState(struct acpi_softc *sc, int state)
1744 ACPI_STATUS status = AE_OK;
1748 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1751 /* Avoid reentry if already attempting to suspend. */
1752 if (sc->acpi_sstate != ACPI_STATE_S0)
1753 return_ACPI_STATUS (AE_BAD_PARAMETER);
1755 /* We recently woke up so don't suspend again for a while. */
1756 if (sc->acpi_sleep_disabled)
1757 return_ACPI_STATUS (AE_OK);
1764 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB);
1765 if (status == AE_NOT_FOUND) {
1766 device_printf(sc->acpi_dev,
1767 "Sleep state S%d not supported by BIOS\n", state);
1769 } else if (ACPI_FAILURE(status)) {
1770 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n",
1771 AcpiFormatException(status));
1775 sc->acpi_sstate = state;
1776 sc->acpi_sleep_disabled = 1;
1778 /* Disable all wake GPEs not appropriate for this state. */
1779 acpi_wake_limit_walk(state);
1781 /* Inform all devices that we are going to sleep. */
1782 if (DEVICE_SUSPEND(root_bus) != 0) {
1784 * Re-wake the system.
1786 * XXX note that a better two-pass approach with a 'veto' pass
1787 * followed by a "real thing" pass would be better, but the
1788 * current bus interface does not provide for this.
1790 DEVICE_RESUME(root_bus);
1791 return_ACPI_STATUS (AE_ERROR);
1794 status = AcpiEnterSleepStatePrep(state);
1795 if (ACPI_FAILURE(status)) {
1796 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1797 AcpiFormatException(status));
1801 if (sc->acpi_sleep_delay > 0)
1802 DELAY(sc->acpi_sleep_delay * 1000000);
1804 if (state != ACPI_STATE_S1) {
1805 acpi_sleep_machdep(sc, state);
1807 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */
1808 AcpiOsReleaseLock(AcpiGbl_HardwareLock, 1);
1810 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
1811 if (state == ACPI_STATE_S4)
1814 status = AcpiEnterSleepState((UINT8)state);
1815 if (ACPI_FAILURE(status)) {
1816 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
1817 AcpiFormatException(status));
1821 AcpiLeaveSleepState((UINT8)state);
1822 DEVICE_RESUME(root_bus);
1823 sc->acpi_sstate = ACPI_STATE_S0;
1824 acpi_enable_fixed_events(sc);
1828 * Shut down cleanly and power off. This will call us back through the
1829 * shutdown handlers.
1831 shutdown_nice(RB_POWEROFF);
1835 status = AE_BAD_PARAMETER;
1839 /* Disable a second sleep request for a short period */
1840 if (sc->acpi_sleep_disabled)
1841 callout_reset(&sc->acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME,
1842 acpi_sleep_enable, sc);
1844 return_ACPI_STATUS (status);
1847 /* Initialize a device's wake GPE. */
1849 acpi_wake_init(device_t dev, int type)
1851 struct acpi_prw_data prw;
1853 /* Check that the device can wake the system. */
1854 if ((device_get_flags(dev) & ACPI_FLAG_WAKE_CAPABLE) == 0)
1857 /* Evaluate _PRW to find the GPE. */
1858 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
1861 /* Set the requested type for the GPE (runtime, wake, or both). */
1862 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) {
1863 device_printf(dev, "set GPE type failed\n");
1870 /* Enable or disable the device's wake GPE. */
1872 acpi_wake_set_enable(device_t dev, int enable)
1874 struct acpi_prw_data prw;
1879 /* Make sure the device supports waking the system. */
1880 flags = device_get_flags(dev);
1881 handle = acpi_get_handle(dev);
1882 if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL)
1885 /* Evaluate _PRW to find the GPE. */
1886 if (acpi_parse_prw(handle, &prw) != 0)
1890 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
1891 if (ACPI_FAILURE(status)) {
1892 device_printf(dev, "enable wake failed\n");
1895 device_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
1897 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
1898 if (ACPI_FAILURE(status)) {
1899 device_printf(dev, "disable wake failed\n");
1902 device_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
1908 /* Configure a device's GPE appropriately for the new sleep state. */
1910 acpi_wake_sleep_prep(device_t dev, int sstate)
1912 struct acpi_prw_data prw;
1916 /* Check that this is an ACPI device and get its GPE. */
1917 flags = device_get_flags(dev);
1918 handle = acpi_get_handle(dev);
1919 if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL)
1922 /* Evaluate _PRW to find the GPE. */
1923 if (acpi_parse_prw(handle, &prw) != 0)
1927 * TBD: All Power Resources referenced by elements 2 through N
1928 * of the _PRW object are put into the ON state.
1932 * If the user requested that this device wake the system and the next
1933 * sleep state is valid for this GPE, enable it and the device's wake
1934 * capability. The sleep state must be less than (i.e., higher power)
1935 * or equal to the value specified by _PRW. Return early, leaving
1936 * the appropriate power resources enabled.
1938 if ((flags & ACPI_FLAG_WAKE_ENABLED) != 0 &&
1939 sstate <= prw.lowest_wake) {
1941 device_printf(dev, "wake_prep enabled gpe %#x for state %d\n",
1942 prw.gpe_bit, sstate);
1943 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
1944 acpi_SetInteger(handle, "_PSW", 1);
1949 * If the device wake was disabled or this sleep state is too low for
1950 * this device, disable its wake capability and GPE.
1952 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
1953 acpi_SetInteger(handle, "_PSW", 0);
1955 device_printf(dev, "wake_prep disabled gpe %#x for state %d\n",
1956 prw.gpe_bit, sstate);
1959 * TBD: All Power Resources referenced by elements 2 through N
1960 * of the _PRW object are put into the OFF state.
1966 /* Re-enable GPEs after wake. */
1968 acpi_wake_run_prep(device_t dev)
1970 struct acpi_prw_data prw;
1974 /* Check that this is an ACPI device and get its GPE. */
1975 flags = device_get_flags(dev);
1976 handle = acpi_get_handle(dev);
1977 if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL)
1980 /* Evaluate _PRW to find the GPE. */
1981 if (acpi_parse_prw(handle, &prw) != 0)
1985 * TBD: Be sure all Power Resources referenced by elements 2 through N
1986 * of the _PRW object are in the ON state.
1989 /* Disable wake capability and if the user requested, enable the GPE. */
1990 acpi_SetInteger(handle, "_PSW", 0);
1991 if ((flags & ACPI_FLAG_WAKE_ENABLED) != 0)
1992 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
1997 acpi_wake_limit(ACPI_HANDLE h, UINT32 level, void *context, void **status)
1999 struct acpi_prw_data prw;
2002 /* It's ok not to have _PRW if the device can't wake the system. */
2003 if (acpi_parse_prw(h, &prw) != 0)
2006 sstate = (int *)context;
2007 if (*sstate > prw.lowest_wake)
2008 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2013 /* Walk all system devices, disabling them if necessary for sstate. */
2015 acpi_wake_limit_walk(int sstate)
2017 ACPI_HANDLE sb_handle;
2019 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2020 AcpiWalkNamespace(ACPI_TYPE_ANY, sb_handle, 100,
2021 acpi_wake_limit, &sstate, NULL);
2025 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2027 acpi_wake_sysctl_walk(device_t dev)
2029 int error, i, numdevs;
2033 error = device_get_children(dev, &devlist, &numdevs);
2034 if (error != 0 || numdevs == 0)
2036 for (i = 0; i < numdevs; i++) {
2038 if (!device_is_attached(child))
2040 if (device_get_flags(child) & ACPI_FLAG_WAKE_CAPABLE) {
2042 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2043 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2044 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2045 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2046 #endif /* dfly_notyet */
2048 acpi_wake_sysctl_walk(child);
2050 kfree(devlist, M_TEMP);
2056 /* Enable or disable wake from userland. */
2058 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2063 dev = (device_t)arg1;
2064 enable = (device_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2066 error = sysctl_handle_int(oidp, &enable, 0, req);
2067 if (error != 0 || req->newptr == NULL)
2069 if (enable != 0 && enable != 1)
2072 return (acpi_wake_set_enable(dev, enable));
2074 #endif /* dfly_notyet */
2076 /* Parse a device's _PRW into a structure. */
2078 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2081 ACPI_BUFFER prw_buffer;
2082 ACPI_OBJECT *res, *res2;
2085 if (h == NULL || prw == NULL)
2089 * The _PRW object (7.2.9) is only required for devices that have the
2090 * ability to wake the system from a sleeping state.
2093 prw_buffer.Pointer = NULL;
2094 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2095 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2096 if (ACPI_FAILURE(status))
2098 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2101 if (!ACPI_PKG_VALID(res, 2))
2105 * Element 1 of the _PRW object:
2106 * The lowest power system sleeping state that can be entered while still
2107 * providing wake functionality. The sleeping state being entered must
2108 * be less than (i.e., higher power) or equal to this value.
2110 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2114 * Element 0 of the _PRW object:
2116 switch (res->Package.Elements[0].Type) {
2117 case ACPI_TYPE_INTEGER:
2119 * If the data type of this package element is numeric, then this
2120 * _PRW package element is the bit index in the GPEx_EN, in the
2121 * GPE blocks described in the FADT, of the enable bit that is
2122 * enabled for the wake event.
2124 prw->gpe_handle = NULL;
2125 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2128 case ACPI_TYPE_PACKAGE:
2130 * If the data type of this package element is a package, then this
2131 * _PRW package element is itself a package containing two
2132 * elements. The first is an object reference to the GPE Block
2133 * device that contains the GPE that will be triggered by the wake
2134 * event. The second element is numeric and it contains the bit
2135 * index in the GPEx_EN, in the GPE Block referenced by the
2136 * first element in the package, of the enable bit that is enabled for
2139 * For example, if this field is a package then it is of the form:
2140 * Package() {\_SB.PCI0.ISA.GPE, 2}
2142 res2 = &res->Package.Elements[0];
2143 if (!ACPI_PKG_VALID(res2, 2))
2145 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2146 if (prw->gpe_handle == NULL)
2148 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2156 /* XXX No power resource handling yet. */
2157 prw->power_res = NULL;
2160 if (prw_buffer.Pointer != NULL)
2161 AcpiOsFree(prw_buffer.Pointer);
2166 * Enable/Disable ACPI
2169 acpi_Enable(struct acpi_softc *sc)
2174 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2177 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT |
2178 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
2179 if (!sc->acpi_enabled)
2180 status = AcpiEnableSubsystem(flags);
2184 if (status == AE_OK)
2185 sc->acpi_enabled = 1;
2187 return_ACPI_STATUS (status);
2191 acpi_Disable(struct acpi_softc *sc)
2195 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2198 if (sc->acpi_enabled)
2199 status = AcpiDisable();
2203 if (status == AE_OK)
2204 sc->acpi_enabled = 0;
2206 return_ACPI_STATUS (status);
2210 * ACPI Event Handlers
2213 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2216 acpi_system_eventhandler_sleep(void *arg, int state)
2219 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2222 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
2223 acpi_SetSleepState((struct acpi_softc *)arg, state);
2229 acpi_system_eventhandler_wakeup(void *arg, int state)
2232 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2234 /* Well, what to do? :-) */
2243 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2246 acpi_event_power_button_sleep(void *context)
2248 struct acpi_softc *sc = (struct acpi_softc *)context;
2250 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2252 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2254 return_VALUE (ACPI_INTERRUPT_HANDLED);
2258 acpi_event_power_button_wake(void *context)
2260 struct acpi_softc *sc = (struct acpi_softc *)context;
2262 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2264 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2266 return_VALUE (ACPI_INTERRUPT_HANDLED);
2270 acpi_event_sleep_button_sleep(void *context)
2272 struct acpi_softc *sc = (struct acpi_softc *)context;
2274 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2276 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
2278 return_VALUE (ACPI_INTERRUPT_HANDLED);
2282 acpi_event_sleep_button_wake(void *context)
2284 struct acpi_softc *sc = (struct acpi_softc *)context;
2286 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2288 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
2290 return_VALUE (ACPI_INTERRUPT_HANDLED);
2294 * XXX This is kinda ugly, and should not be here.
2296 struct acpi_staticbuf {
2302 acpi_name(ACPI_HANDLE handle)
2304 static struct acpi_staticbuf buf;
2308 buf.buffer.Length = 512;
2309 buf.buffer.Pointer = &buf.data[0];
2311 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer)))
2312 return (buf.buffer.Pointer);
2314 return ("(unknown path)");
2318 * Debugging/bug-avoidance. Avoid trying to fetch info on various
2319 * parts of the namespace.
2322 acpi_avoid(ACPI_HANDLE handle)
2324 char *cp, *env, *np;
2327 np = acpi_name(handle);
2330 if ((env = kgetenv("debug.acpi.avoid.paths")) == NULL &&
2331 (env = kgetenv("debug.acpi.avoid")) == NULL)
2334 /* Scan the avoid list checking for a match */
2337 while ((*cp != 0) && isspace(*cp))
2342 while ((cp[len] != 0) && !isspace(cp[len]))
2344 if (!strncmp(cp, np, len)) {
2356 * Debugging/bug-avoidance. Disable ACPI subsystem components. Note that
2357 * some components may be disabled by default and can only be enabled
2358 * via acpi_enabled() (debug.acpi.enabled).
2361 acpi_disabled(char *subsys)
2366 if ((env = kgetenv("debug.acpi.disabled")) == NULL)
2368 if (strcmp(env, "all") == 0) {
2373 /* Scan the disable list, checking for a match. */
2376 while (*cp != '\0' && isspace(*cp))
2381 while (cp[len] != '\0' && !isspace(cp[len]))
2383 if (strncmp(cp, subsys, len) == 0) {
2395 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most
2396 * components are enabled by default. The ones that are not have to be
2397 * enabled via debug.acpi.enabled.
2400 acpi_enabled(char *subsys)
2405 if ((env = kgetenv("debug.acpi.enabled")) == NULL)
2407 if (strcmp(env, "all") == 0) {
2412 /* Scan the enable list, checking for a match. */
2415 while (*cp != '\0' && isspace(*cp))
2420 while (cp[len] != '\0' && !isspace(cp[len]))
2422 if (strncmp(cp, subsys, len) == 0) {
2434 * Control interface.
2436 * We multiplex ioctls for all participating ACPI devices here. Individual
2437 * drivers wanting to be accessible via /dev/acpi should use the
2438 * register/deregister interface to make their handlers visible.
2440 struct acpi_ioctl_hook
2442 TAILQ_ENTRY(acpi_ioctl_hook) link;
2448 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
2449 static int acpi_ioctl_hooks_initted;
2452 * Register an ioctl handler.
2455 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
2457 struct acpi_ioctl_hook *hp;
2459 hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_INTWAIT);
2463 if (acpi_ioctl_hooks_initted == 0) {
2464 TAILQ_INIT(&acpi_ioctl_hooks);
2465 acpi_ioctl_hooks_initted = 1;
2467 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
2472 * Deregister an ioctl handler.
2475 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
2477 struct acpi_ioctl_hook *hp;
2479 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
2480 if ((hp->cmd == cmd) && (hp->fn == fn))
2484 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
2485 kfree(hp, M_ACPIDEV);
2490 acpiopen(struct dev_open_args *ap)
2496 acpiclose(struct dev_close_args *ap)
2502 acpiioctl(struct dev_ioctl_args *ap)
2504 struct acpi_softc *sc;
2505 struct acpi_ioctl_hook *hp;
2506 int error, xerror, state;
2512 sc = ap->a_head.a_dev->si_drv1;
2515 * Scan the list of registered ioctls, looking for handlers.
2517 if (acpi_ioctl_hooks_initted) {
2518 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
2519 if (hp->cmd == ap->a_cmd) {
2520 xerror = hp->fn(ap->a_cmd, ap->a_data, hp->arg);
2529 * Core ioctls are not permitted for non-writable user.
2530 * Currently, other ioctls just fetch information.
2531 * Not changing system behavior.
2533 if((ap->a_fflag & FWRITE) == 0) {
2538 /* Core system ioctls. */
2539 switch (ap->a_cmd) {
2541 if (ACPI_FAILURE(acpi_Enable(sc)))
2544 case ACPIIO_DISABLE:
2545 if (ACPI_FAILURE(acpi_Disable(sc)))
2548 case ACPIIO_SETSLPSTATE:
2549 if (!sc->acpi_enabled) {
2553 state = *(int *)ap->a_data;
2554 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) {
2555 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
2573 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2575 char sleep_state[4];
2578 UINT8 state, TypeA, TypeB;
2581 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) {
2582 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
2583 ksprintf(sleep_state, "S%d ", state);
2584 strcat(buf, sleep_state);
2587 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
2592 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2594 char sleep_state[10];
2596 u_int new_state, old_state;
2598 old_state = *(u_int *)oidp->oid_arg1;
2599 if (old_state > ACPI_S_STATES_MAX + 1) {
2600 strcpy(sleep_state, "unknown");
2602 bzero(sleep_state, sizeof(sleep_state));
2603 strncpy(sleep_state, sleep_state_names[old_state],
2604 sizeof(sleep_state_names[old_state]));
2606 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
2607 if (error == 0 && req->newptr != NULL) {
2608 new_state = ACPI_STATE_S0;
2609 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) {
2610 if (strncmp(sleep_state, sleep_state_names[new_state],
2611 sizeof(sleep_state)) == 0)
2614 if (new_state <= ACPI_S_STATES_MAX + 1) {
2615 if (new_state != old_state)
2616 *(u_int *)oidp->oid_arg1 = new_state;
2625 /* Inform devctl(4) when we receive a Notify. */
2627 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
2629 char notify_buf[16];
2630 ACPI_BUFFER handle_buf;
2633 if (subsystem == NULL)
2636 handle_buf.Pointer = NULL;
2637 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
2638 status = AcpiNsHandleToPathname(h, &handle_buf);
2639 if (ACPI_FAILURE(status))
2641 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
2643 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
2645 AcpiOsFree(handle_buf.Pointer);
2650 * Support for parsing debug options from the kernel environment.
2652 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
2653 * by specifying the names of the bits in the debug.acpi.layer and
2654 * debug.acpi.level environment variables. Bits may be unset by
2655 * prefixing the bit name with !.
2663 static struct debugtag dbg_layer[] = {
2664 {"ACPI_UTILITIES", ACPI_UTILITIES},
2665 {"ACPI_HARDWARE", ACPI_HARDWARE},
2666 {"ACPI_EVENTS", ACPI_EVENTS},
2667 {"ACPI_TABLES", ACPI_TABLES},
2668 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
2669 {"ACPI_PARSER", ACPI_PARSER},
2670 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
2671 {"ACPI_EXECUTER", ACPI_EXECUTER},
2672 {"ACPI_RESOURCES", ACPI_RESOURCES},
2673 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
2674 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
2675 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
2676 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
2678 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
2679 {"ACPI_BATTERY", ACPI_BATTERY},
2680 {"ACPI_BUS", ACPI_BUS},
2681 {"ACPI_BUTTON", ACPI_BUTTON},
2682 {"ACPI_EC", ACPI_EC},
2683 {"ACPI_FAN", ACPI_FAN},
2684 {"ACPI_POWERRES", ACPI_POWERRES},
2685 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
2686 {"ACPI_THERMAL", ACPI_THERMAL},
2687 {"ACPI_TIMER", ACPI_TIMER},
2688 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
2692 static struct debugtag dbg_level[] = {
2693 {"ACPI_LV_ERROR", ACPI_LV_ERROR},
2694 {"ACPI_LV_WARN", ACPI_LV_WARN},
2695 {"ACPI_LV_INIT", ACPI_LV_INIT},
2696 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
2697 {"ACPI_LV_INFO", ACPI_LV_INFO},
2698 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
2700 /* Trace verbosity level 1 [Standard Trace Level] */
2701 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
2702 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
2703 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
2704 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
2705 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
2706 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
2707 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
2708 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
2709 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
2710 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
2711 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
2712 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
2713 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
2714 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
2715 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
2717 /* Trace verbosity level 2 [Function tracing and memory allocation] */
2718 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
2719 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
2720 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
2721 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
2722 {"ACPI_LV_ALL", ACPI_LV_ALL},
2724 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
2725 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
2726 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
2727 {"ACPI_LV_IO", ACPI_LV_IO},
2728 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
2729 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
2731 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
2732 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
2733 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
2734 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
2735 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
2736 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
2741 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
2753 while (*ep && !isspace(*ep))
2764 for (i = 0; tag[i].name != NULL; i++) {
2765 if (!strncmp(cp, tag[i].name, l)) {
2767 *flag |= tag[i].value;
2769 *flag &= ~tag[i].value;
2777 * Warning: also called in early boot, before any allocators
2781 acpi_set_debugging(void *junk)
2783 char *layer, *level;
2790 layer = kgetenv("debug.acpi.layer");
2791 level = kgetenv("debug.acpi.level");
2792 if (layer == NULL && level == NULL)
2795 kprintf("ACPI set debug");
2796 if (layer != NULL) {
2797 if (strcmp("NONE", layer) != 0)
2798 kprintf(" layer '%s'", layer);
2799 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
2802 if (level != NULL) {
2803 if (strcmp("NONE", level) != 0)
2804 kprintf(" level '%s'", level);
2805 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
2810 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY,
2811 acpi_set_debugging, NULL);
2814 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
2817 struct debugtag *tag;
2820 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
2822 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
2823 tag = &dbg_layer[0];
2824 dbg = &AcpiDbgLayer;
2826 tag = &dbg_level[0];
2827 dbg = &AcpiDbgLevel;
2830 /* Get old values if this is a get request. */
2832 sbuf_cpy(&sb, "NONE");
2833 } else if (req->newptr == NULL) {
2834 for (; tag->name != NULL; tag++) {
2835 if ((*dbg & tag->value) == tag->value)
2836 sbuf_printf(&sb, "%s ", tag->name);
2842 /* Copy out the old values to the user. */
2843 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
2846 /* If the user is setting a string, parse it. */
2847 if (error == 0 && req->newptr != NULL) {
2849 ksetenv(oidp->oid_arg1, req->newptr);
2850 acpi_set_debugging(NULL);
2855 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
2856 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
2857 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
2858 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
2862 acpi_pm_func(u_long cmd, void *arg, ...)
2864 int state, acpi_state;
2866 struct acpi_softc *sc;
2871 case POWER_CMD_SUSPEND:
2872 sc = (struct acpi_softc *)arg;
2879 state = va_arg(ap, int);
2883 case POWER_SLEEP_STATE_STANDBY:
2884 acpi_state = sc->acpi_standby_sx;
2886 case POWER_SLEEP_STATE_SUSPEND:
2887 acpi_state = sc->acpi_suspend_sx;
2889 case POWER_SLEEP_STATE_HIBERNATE:
2890 acpi_state = ACPI_STATE_S4;
2897 acpi_SetSleepState(sc, acpi_state);
2909 acpi_pm_register(void *arg)
2911 if (!cold || resource_disabled("acpi", 0))
2914 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
2917 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0);