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 1.16 2005/10/30 04:20:49 y0netan1 Exp $
34 #include <sys/param.h>
35 #include <sys/kernel.h>
37 #include <sys/fcntl.h>
38 #include <sys/malloc.h>
41 #include <sys/ioccom.h>
42 #include <sys/reboot.h>
43 #include <sys/sysctl.h>
44 #include <sys/ctype.h>
45 #include <sys/linker.h>
46 #include <sys/power.h>
48 #include <sys/thread2.h>
50 #include <machine/clock.h>
51 #include <machine/globaldata.h>
52 #include <machine/resource.h>
53 #include <machine/bus.h>
55 #include <bus/isa/isavar.h>
58 #include <dev/acpica5/acpivar.h>
59 #include <dev/acpica5/acpiio.h>
62 MALLOC_DEFINE(M_ACPIDEV
, "acpidev", "ACPI devices");
64 /* Hooks for the ACPI CA debugging infrastructure */
65 #define _COMPONENT ACPI_BUS
66 ACPI_MODULE_NAME("ACPI")
68 static d_open_t acpiopen
;
69 static d_close_t acpiclose
;
70 static d_ioctl_t acpiioctl
;
72 #define CDEV_MAJOR 152
73 static struct cdevsw acpi_cdevsw
= {
80 .old_close
= acpiclose
,
81 .old_ioctl
= acpiioctl
84 #if __FreeBSD_version >= 500000
85 struct mtx acpi_mutex
;
94 #define ACPI_OEM_REV_ANY 0
96 static struct acpi_quirks acpi_quirks_table
[] = {
98 /* Bad PCI routing table. Used on some SuperMicro boards. */
99 { "PTLTD ", 0x06040000, "pci_link" },
105 static int acpi_modevent(struct module
*mod
, int event
, void *junk
);
106 static int acpi_identify(driver_t
*driver
, device_t parent
);
107 static int acpi_probe(device_t dev
);
108 static int acpi_attach(device_t dev
);
109 static int acpi_shutdown(device_t dev
);
110 static void acpi_quirks_set(void);
111 static device_t
acpi_add_child(device_t bus
, int order
, const char *name
,
113 static int acpi_print_child(device_t bus
, device_t child
);
114 static int acpi_read_ivar(device_t dev
, device_t child
, int index
,
116 static int acpi_write_ivar(device_t dev
, device_t child
, int index
,
118 static int acpi_set_resource(device_t dev
, device_t child
, int type
,
119 int rid
, u_long start
, u_long count
);
120 static int acpi_get_resource(device_t dev
, device_t child
, int type
,
121 int rid
, u_long
*startp
, u_long
*countp
);
122 static struct resource
*acpi_alloc_resource(device_t bus
, device_t child
,
123 int type
, int *rid
, u_long start
, u_long end
,
124 u_long count
, u_int flags
);
125 static int acpi_release_resource(device_t bus
, device_t child
, int type
,
126 int rid
, struct resource
*r
);
127 static uint32_t acpi_isa_get_logicalid(device_t dev
);
128 static int acpi_isa_get_compatid(device_t dev
, uint32_t *cids
, int count
);
129 static int acpi_isa_pnp_probe(device_t bus
, device_t child
,
130 struct isa_pnp_id
*ids
);
131 static void acpi_probe_children(device_t bus
);
132 static ACPI_STATUS
acpi_probe_child(ACPI_HANDLE handle
, UINT32 level
,
133 void *context
, void **status
);
134 static void acpi_shutdown_pre_sync(void *arg
, int howto
);
135 static void acpi_shutdown_final(void *arg
, int howto
);
136 static void acpi_shutdown_poweroff(void *arg
);
137 static void acpi_enable_fixed_events(struct acpi_softc
*sc
);
138 static int acpi_parse_prw(ACPI_HANDLE h
, struct acpi_prw_data
*prw
);
139 static ACPI_STATUS
acpi_wake_limit(ACPI_HANDLE h
, UINT32 level
, void *context
,
141 static int acpi_wake_limit_walk(int sstate
);
142 static int acpi_wake_sysctl_walk(device_t dev
);
144 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
, bus_generic_suspend
),
164 DEVMETHOD(device_resume
, bus_generic_resume
),
167 DEVMETHOD(bus_add_child
, acpi_add_child
),
168 DEVMETHOD(bus_print_child
, acpi_print_child
),
169 DEVMETHOD(bus_read_ivar
, acpi_read_ivar
),
170 DEVMETHOD(bus_write_ivar
, acpi_write_ivar
),
171 DEVMETHOD(bus_set_resource
, acpi_set_resource
),
172 DEVMETHOD(bus_get_resource
, acpi_get_resource
),
173 DEVMETHOD(bus_alloc_resource
, acpi_alloc_resource
),
174 DEVMETHOD(bus_release_resource
, acpi_release_resource
),
175 DEVMETHOD(bus_child_pnpinfo_str
, acpi_child_pnpinfo_str_method
),
176 DEVMETHOD(bus_child_location_str
, acpi_child_location_str_method
),
177 DEVMETHOD(bus_driver_added
, bus_generic_driver_added
),
178 DEVMETHOD(bus_activate_resource
, bus_generic_activate_resource
),
179 DEVMETHOD(bus_deactivate_resource
, bus_generic_deactivate_resource
),
180 DEVMETHOD(bus_setup_intr
, bus_generic_setup_intr
),
181 DEVMETHOD(bus_teardown_intr
, bus_generic_teardown_intr
),
184 DEVMETHOD(isa_pnp_probe
, acpi_isa_pnp_probe
),
189 static driver_t acpi_driver
= {
192 sizeof(struct acpi_softc
),
195 static devclass_t acpi_devclass
;
196 DRIVER_MODULE(acpi
, nexus
, acpi_driver
, acpi_devclass
, acpi_modevent
, 0);
197 MODULE_VERSION(acpi
, 1);
199 static const char* sleep_state_names
[] = {
200 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
202 SYSCTL_NODE(_debug
, OID_AUTO
, acpi
, CTLFLAG_RW
, NULL
, "ACPI debugging");
203 static char acpi_ca_version
[12];
204 SYSCTL_STRING(_debug_acpi
, OID_AUTO
, acpi_ca_version
, CTLFLAG_RD
,
205 acpi_ca_version
, 0, "Version of Intel ACPI-CA");
208 * Allow override of whether methods execute in parallel or not.
209 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
210 * errors for AML that really can't handle parallel method execution.
211 * It is off by default since this breaks recursive methods and
212 * some IBMs use such code.
214 static int acpi_serialize_methods
;
215 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods
);
218 * ACPI can only be loaded as a module by the loader; activating it after
219 * system bootstrap time is not useful, and can be fatal to the system.
220 * It also cannot be unloaded, since the entire system bus heirarchy hangs
224 acpi_modevent(struct module
*mod
, int event
, void *junk
)
229 printf("The ACPI driver cannot be loaded after boot.\n");
234 if (!cold
&& power_pm_get_type() == POWER_PM_TYPE_ACPI
)
244 * Perform early initialization.
252 static int error
, started
= 0;
254 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
257 return_VALUE (error
);
260 #if __FreeBSD_version >= 500000
261 /* Initialise the ACPI mutex */
262 mtx_init(&acpi_mutex
, "ACPI global lock", NULL
, MTX_DEF
);
266 * Set the globals from our tunables. This is needed because ACPI-CA
267 * uses UINT8 for some values and we have no tunable_byte.
269 AcpiGbl_AllMethodsSerialized
= (UINT8
)acpi_serialize_methods
;
271 /* Start up the ACPI CA subsystem. */
273 debugpoint
= getenv("debug.acpi.debugger");
275 if (!strcmp(debugpoint
, "init"))
276 acpi_EnterDebugger();
280 if (ACPI_FAILURE(error
= AcpiInitializeSubsystem())) {
281 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error
));
282 return_VALUE (error
);
285 debugpoint
= getenv("debug.acpi.debugger");
287 if (!strcmp(debugpoint
, "tables"))
288 acpi_EnterDebugger();
293 if (ACPI_FAILURE(error
= AcpiLoadTables())) {
294 printf("ACPI: table load failed: %s\n", AcpiFormatException(error
));
298 /* Set up any quirks we have for this XSDT. */
300 if (acpi_disabled("acpi"))
301 return_VALUE (AE_ERROR
);
303 return_VALUE (AE_OK
);
307 * Detect ACPI, perform early initialisation
310 acpi_identify(driver_t
*driver
, device_t parent
)
315 * No sense rescanning an ACPI 'bus'.
317 if (device_get_state(parent
) == DS_ATTACHED
)
320 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
325 /* Check that we haven't been disabled with a hint. */
326 if (resource_disabled("acpi", 0))
329 /* Make sure we're not being doubly invoked. */
330 if (device_find_child(parent
, "acpi", 0) != NULL
)
333 /* Initialize ACPI-CA. */
334 if (ACPI_FAILURE(acpi_Startup()))
337 snprintf(acpi_ca_version
, sizeof(acpi_ca_version
), "%#x", ACPI_CA_VERSION
);
339 /* Attach the actual ACPI device. */
340 if ((child
= BUS_ADD_CHILD(parent
, 0, "acpi", 0)) == NULL
) {
341 device_printf(parent
, "ACPI: could not attach\n");
348 * Fetch some descriptive data from ACPI to put in our attach message
351 acpi_probe(device_t dev
)
353 ACPI_TABLE_HEADER th
;
360 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
362 if (power_pm_get_type() != POWER_PM_TYPE_NONE
&&
363 power_pm_get_type() != POWER_PM_TYPE_ACPI
) {
365 device_printf(dev
, "Other PM system enabled.\n");
371 if (ACPI_FAILURE(status
= AcpiGetTableHeader(ACPI_TABLE_XSDT
, 1, &th
))) {
372 device_printf(dev
, "couldn't get XSDT header: %s\n",
373 AcpiFormatException(status
));
376 sbuf_new(&sb
, buf
, sizeof(buf
), SBUF_FIXEDLEN
);
377 sbuf_bcat(&sb
, th
.OemId
, 6);
380 sbuf_bcat(&sb
, th
.OemTableId
, 8);
383 device_set_desc_copy(dev
, sbuf_data(&sb
));
392 acpi_attach(device_t dev
)
394 struct acpi_softc
*sc
;
405 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
407 sc
= device_get_softc(dev
);
408 bzero(sc
, sizeof(*sc
));
410 callout_init(&sc
->acpi_sleep_timer
);
413 debugpoint
= getenv("debug.acpi.debugger");
415 if (!strcmp(debugpoint
, "spaces"))
416 acpi_EnterDebugger();
421 /* Install the default address space handlers. */
423 status
= AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT
,
424 ACPI_ADR_SPACE_SYSTEM_MEMORY
, ACPI_DEFAULT_HANDLER
, NULL
, NULL
);
425 if (ACPI_FAILURE(status
)) {
426 device_printf(dev
, "Could not initialise SystemMemory handler: %s\n",
427 AcpiFormatException(status
));
430 status
= AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT
,
431 ACPI_ADR_SPACE_SYSTEM_IO
, ACPI_DEFAULT_HANDLER
, NULL
, NULL
);
432 if (ACPI_FAILURE(status
)) {
433 device_printf(dev
, "Could not initialise SystemIO handler: %s\n",
434 AcpiFormatException(status
));
437 status
= AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT
,
438 ACPI_ADR_SPACE_PCI_CONFIG
, ACPI_DEFAULT_HANDLER
, NULL
, NULL
);
439 if (ACPI_FAILURE(status
)) {
440 device_printf(dev
, "could not initialise PciConfig handler: %s\n",
441 AcpiFormatException(status
));
446 * Bring ACPI fully online.
448 * Note that some systems (specifically, those with namespace evaluation
449 * issues that require the avoidance of parts of the namespace) must
450 * avoid running _INI and _STA on everything, as well as dodging the final
453 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
454 * For avoiding portions of the namespace without totally disabling _INI
455 * and _STA, use "debug.acpi.avoid.paths".
457 * XXX We should arrange for the object init pass after we have attached
458 * all our child devices, but on many systems it works here.
461 debugpoint
= getenv("debug.acpi.debugger");
463 if (!strcmp(debugpoint
, "enable"))
464 acpi_EnterDebugger();
469 if (testenv("debug.acpi.avoid"))
470 flags
= ACPI_NO_DEVICE_INIT
| ACPI_NO_OBJECT_INIT
;
471 if (ACPI_FAILURE(status
= AcpiEnableSubsystem(flags
))) {
472 device_printf(dev
, "Could not enable ACPI: %s\n",
473 AcpiFormatException(status
));
478 * Call the ECDT probe function to provide EC functionality before
479 * the namespace has been evaluated.
481 acpi_ec_ecdt_probe(dev
);
483 if (ACPI_FAILURE(status
= AcpiInitializeObjects(flags
))) {
484 device_printf(dev
, "Could not initialize ACPI objects: %s\n",
485 AcpiFormatException(status
));
490 * Setup our sysctl tree.
492 * XXX: This doesn't check to make sure that none of these fail.
494 sysctl_ctx_init(&sc
->acpi_sysctl_ctx
);
495 sc
->acpi_sysctl_tree
= SYSCTL_ADD_NODE(&sc
->acpi_sysctl_ctx
,
496 SYSCTL_STATIC_CHILDREN(_hw
), OID_AUTO
,
497 device_get_name(dev
), CTLFLAG_RD
, 0, "");
498 SYSCTL_ADD_PROC(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
499 OID_AUTO
, "supported_sleep_state", CTLTYPE_STRING
| CTLFLAG_RD
,
500 0, 0, acpi_supported_sleep_state_sysctl
, "A", "");
501 SYSCTL_ADD_PROC(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
502 OID_AUTO
, "power_button_state", CTLTYPE_STRING
| CTLFLAG_RW
,
503 &sc
->acpi_power_button_sx
, 0, acpi_sleep_state_sysctl
, "A", "");
504 SYSCTL_ADD_PROC(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
505 OID_AUTO
, "sleep_button_state", CTLTYPE_STRING
| CTLFLAG_RW
,
506 &sc
->acpi_sleep_button_sx
, 0, acpi_sleep_state_sysctl
, "A", "");
507 SYSCTL_ADD_PROC(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
508 OID_AUTO
, "lid_switch_state", CTLTYPE_STRING
| CTLFLAG_RW
,
509 &sc
->acpi_lid_switch_sx
, 0, acpi_sleep_state_sysctl
, "A", "");
510 SYSCTL_ADD_PROC(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
511 OID_AUTO
, "standby_state", CTLTYPE_STRING
| CTLFLAG_RW
,
512 &sc
->acpi_standby_sx
, 0, acpi_sleep_state_sysctl
, "A", "");
513 SYSCTL_ADD_PROC(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
514 OID_AUTO
, "suspend_state", CTLTYPE_STRING
| CTLFLAG_RW
,
515 &sc
->acpi_suspend_sx
, 0, acpi_sleep_state_sysctl
, "A", "");
516 SYSCTL_ADD_INT(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
517 OID_AUTO
, "sleep_delay", CTLFLAG_RD
| CTLFLAG_RW
,
518 &sc
->acpi_sleep_delay
, 0, "sleep delay");
519 SYSCTL_ADD_INT(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
520 OID_AUTO
, "s4bios", CTLFLAG_RD
| CTLFLAG_RW
,
521 &sc
->acpi_s4bios
, 0, "S4BIOS mode");
522 SYSCTL_ADD_INT(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
523 OID_AUTO
, "verbose", CTLFLAG_RD
| CTLFLAG_RW
,
524 &sc
->acpi_verbose
, 0, "verbose mode");
525 SYSCTL_ADD_INT(&sc
->acpi_sysctl_ctx
, SYSCTL_CHILDREN(sc
->acpi_sysctl_tree
),
526 OID_AUTO
, "disable_on_poweroff", CTLFLAG_RD
| CTLFLAG_RW
,
527 &sc
->acpi_disable_on_poweroff
, 0, "ACPI subsystem disable on poweroff");
530 * Default to 1 second before sleeping to give some machines time to
533 sc
->acpi_sleep_delay
= 1;
534 sc
->acpi_disable_on_poweroff
= 0;
536 sc
->acpi_verbose
= 1;
537 if ((env
= getenv("hw.acpi.verbose")) && strcmp(env
, "0")) {
538 sc
->acpi_verbose
= 1;
542 /* Only enable S4BIOS by default if the FACS says it is available. */
543 if (AcpiGbl_FACS
->S4Bios_f
!= 0)
547 * Dispatch the default sleep state to devices. The lid switch is set
548 * to NONE by default to avoid surprising users.
550 sc
->acpi_power_button_sx
= ACPI_STATE_S5
;
551 sc
->acpi_lid_switch_sx
= ACPI_S_STATES_MAX
+ 1;
552 sc
->acpi_standby_sx
= ACPI_STATE_S1
;
553 sc
->acpi_suspend_sx
= ACPI_STATE_S3
;
555 /* Pick the first valid sleep state for the sleep button default. */
556 sc
->acpi_sleep_button_sx
= ACPI_S_STATES_MAX
+ 1;
557 for (state
= ACPI_STATE_S1
; state
< ACPI_STATE_S5
; state
++)
558 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state
, &TypeA
, &TypeB
))) {
559 sc
->acpi_sleep_button_sx
= state
;
563 acpi_enable_fixed_events(sc
);
566 * Scan the namespace and attach/initialise children.
569 debugpoint
= getenv("debug.acpi.debugger");
571 if (!strcmp(debugpoint
, "probe"))
572 acpi_EnterDebugger();
577 /* Register our shutdown handlers */
578 EVENTHANDLER_REGISTER(shutdown_pre_sync
, acpi_shutdown_pre_sync
, sc
,
580 EVENTHANDLER_REGISTER(shutdown_final
, acpi_shutdown_final
, sc
,
584 * Register our acpi event handlers.
585 * XXX should be configurable eg. via userland policy manager.
587 EVENTHANDLER_REGISTER(acpi_sleep_event
, acpi_system_eventhandler_sleep
,
588 sc
, ACPI_EVENT_PRI_LAST
);
589 EVENTHANDLER_REGISTER(acpi_wakeup_event
, acpi_system_eventhandler_wakeup
,
590 sc
, ACPI_EVENT_PRI_LAST
);
592 /* Flag our initial states. */
593 sc
->acpi_enabled
= 1;
594 sc
->acpi_sstate
= ACPI_STATE_S0
;
595 sc
->acpi_sleep_disabled
= 0;
597 /* Create the control device */
598 cdevsw_add(&acpi_cdevsw
, 0, 0);
599 sc
->acpi_dev_t
= make_dev(&acpi_cdevsw
, 0, UID_ROOT
, GID_WHEEL
, 0644,
601 sc
->acpi_dev_t
->si_drv1
= sc
;
604 debugpoint
= getenv("debug.acpi.debugger");
606 if (strcmp(debugpoint
, "running") == 0)
607 acpi_EnterDebugger();
612 if ((error
= acpi_task_thread_init()))
615 if ((error
= acpi_machdep_init(dev
)))
618 /* Register ACPI again to pass the correct argument of pm_func. */
619 power_pm_register(POWER_PM_TYPE_ACPI
, acpi_pm_func
, sc
);
621 if (!acpi_disabled("bus"))
622 acpi_probe_children(dev
);
628 return_VALUE (error
);
632 acpi_shutdown(device_t dev
)
634 /* Allow children to shutdown first. */
635 bus_generic_shutdown(dev
);
637 /* Disable all wake GPEs not appropriate for reboot/poweroff. */
638 acpi_wake_limit_walk(ACPI_STATE_S5
);
645 XSDT_DESCRIPTOR
*xsdt
;
646 struct acpi_quirks
*quirk
;
651 * If the user loaded a custom table or disabled "quirks", leave
652 * the settings alone.
655 if ((env
= getenv("acpi_dsdt_load")) != NULL
) {
656 /* XXX No strcasecmp but this is good enough. */
657 if (*env
== 'Y' || *env
== 'y')
661 if ((env
= getenv("debug.acpi.disabled")) != NULL
) {
662 if (strstr("quirks", env
) != NULL
)
668 * Search through our quirk table and concatenate the disabled
669 * values with whatever we find.
672 for (quirk
= acpi_quirks_table
; quirk
->OemId
; quirk
++) {
673 if (!strncmp(xsdt
->OemId
, quirk
->OemId
, strlen(quirk
->OemId
)) &&
674 (xsdt
->OemRevision
== quirk
->OemRevision
||
675 quirk
->OemRevision
== ACPI_OEM_REV_ANY
)) {
676 len
+= strlen(quirk
->value
) + 2;
677 if ((tmp
= malloc(len
, M_TEMP
, M_NOWAIT
)) == NULL
)
679 sprintf(tmp
, "%s %s", env
? env
: "", quirk
->value
);
681 setenv("debug.acpi.disabled", tmp
);
694 * Handle a new device being added
697 acpi_add_child(device_t bus
, int order
, const char *name
, int unit
)
699 struct acpi_device
*ad
;
702 ad
= malloc(sizeof(*ad
), M_ACPIDEV
, M_INTWAIT
| M_ZERO
);
704 resource_list_init(&ad
->ad_rl
);
706 child
= device_add_child_ordered(bus
, order
, name
, unit
);
708 device_set_ivars(child
, ad
);
713 acpi_print_child(device_t bus
, device_t child
)
715 struct acpi_device
*adev
= device_get_ivars(child
);
716 struct resource_list
*rl
= &adev
->ad_rl
;
719 retval
+= bus_print_child_header(bus
, child
);
720 retval
+= resource_list_print_type(rl
, "port", SYS_RES_IOPORT
, "%#lx");
721 retval
+= resource_list_print_type(rl
, "iomem", SYS_RES_MEMORY
, "%#lx");
722 retval
+= resource_list_print_type(rl
, "irq", SYS_RES_IRQ
, "%ld");
723 retval
+= resource_list_print_type(rl
, "drq", SYS_RES_DRQ
, "%ld");
724 retval
+= bus_print_child_footer(bus
, child
);
729 /* Location hint for devctl(8) */
731 acpi_child_location_str_method(device_t cbdev
, device_t child
, char *buf
,
734 struct acpi_device
*dinfo
= device_get_ivars(child
);
736 if (dinfo
->ad_handle
)
737 snprintf(buf
, buflen
, "path=%s", acpi_name(dinfo
->ad_handle
));
739 snprintf(buf
, buflen
, "magic=unknown");
743 /* PnP information for devctl(8) */
745 acpi_child_pnpinfo_str_method(device_t cbdev
, device_t child
, char *buf
,
748 ACPI_BUFFER adbuf
= {ACPI_ALLOCATE_BUFFER
, NULL
};
749 ACPI_DEVICE_INFO
*adinfo
;
750 struct acpi_device
*dinfo
= device_get_ivars(child
);
754 error
= AcpiGetObjectInfo(dinfo
->ad_handle
, &adbuf
);
755 adinfo
= (ACPI_DEVICE_INFO
*) adbuf
.Pointer
;
758 snprintf(buf
, buflen
, "Unknown");
760 snprintf(buf
, buflen
, "_HID=%s _UID=%lu",
761 (adinfo
->Valid
& ACPI_VALID_HID
) ?
762 adinfo
->HardwareId
.Value
: "UNKNOWN",
763 (adinfo
->Valid
& ACPI_VALID_UID
) ?
764 strtoul(adinfo
->UniqueId
.Value
, &end
, 10) : 0);
773 * Handle per-device ivars
776 acpi_read_ivar(device_t dev
, device_t child
, int index
, uintptr_t *result
)
778 struct acpi_device
*ad
;
780 if ((ad
= device_get_ivars(child
)) == NULL
) {
781 printf("device has no ivars\n");
785 /* ACPI and ISA compatibility ivars */
787 case ACPI_IVAR_HANDLE
:
788 *(ACPI_HANDLE
*)result
= ad
->ad_handle
;
790 case ACPI_IVAR_MAGIC
:
791 *(int *)result
= ad
->ad_magic
;
793 case ACPI_IVAR_PRIVATE
:
794 *(void **)result
= ad
->ad_private
;
796 case ISA_IVAR_VENDORID
:
797 case ISA_IVAR_SERIAL
:
798 case ISA_IVAR_COMPATID
:
801 case ISA_IVAR_LOGICALID
:
802 *(int *)result
= acpi_isa_get_logicalid(child
);
812 acpi_write_ivar(device_t dev
, device_t child
, int index
, uintptr_t value
)
814 struct acpi_device
*ad
;
816 if ((ad
= device_get_ivars(child
)) == NULL
) {
817 printf("device has no ivars\n");
822 case ACPI_IVAR_HANDLE
:
823 ad
->ad_handle
= (ACPI_HANDLE
)value
;
825 case ACPI_IVAR_MAGIC
:
826 ad
->ad_magic
= (int)value
;
828 case ACPI_IVAR_PRIVATE
:
829 ad
->ad_private
= (void *)value
;
832 panic("bad ivar write request (%d)", index
);
840 * Handle child resource allocation/removal
843 acpi_set_resource(device_t dev
, device_t child
, int type
, int rid
,
844 u_long start
, u_long count
)
846 struct acpi_device
*ad
= device_get_ivars(child
);
847 struct resource_list
*rl
= &ad
->ad_rl
;
849 resource_list_add(rl
, type
, rid
, start
, start
+ count
-1, count
);
855 acpi_get_resource(device_t dev
, device_t child
, int type
, int rid
,
856 u_long
*startp
, u_long
*countp
)
858 struct acpi_device
*ad
= device_get_ivars(child
);
859 struct resource_list
*rl
= &ad
->ad_rl
;
860 struct resource_list_entry
*rle
;
862 rle
= resource_list_find(rl
, type
, rid
);
867 *startp
= rle
->start
;
869 *countp
= rle
->count
;
874 static struct resource
*
875 acpi_alloc_resource(device_t bus
, device_t child
, int type
, int *rid
,
876 u_long start
, u_long end
, u_long count
, u_int flags
)
878 struct acpi_device
*ad
= device_get_ivars(child
);
879 struct resource_list
*rl
= &ad
->ad_rl
;
881 return (resource_list_alloc(rl
, bus
, child
, type
, rid
, start
, end
, count
,
886 acpi_release_resource(device_t bus
, device_t child
, int type
, int rid
, struct resource
*r
)
888 struct acpi_device
*ad
= device_get_ivars(child
);
889 struct resource_list
*rl
= &ad
->ad_rl
;
891 return (resource_list_release(rl
, bus
, child
, type
, rid
, r
));
894 /* Allocate an IO port or memory resource, given its GAS. */
896 acpi_bus_alloc_gas(device_t dev
, int *rid
, ACPI_GENERIC_ADDRESS
*gas
)
900 if (gas
== NULL
|| !ACPI_VALID_ADDRESS(gas
->Address
) ||
901 gas
->RegisterBitWidth
< 8)
904 switch (gas
->AddressSpaceId
) {
905 case ACPI_ADR_SPACE_SYSTEM_MEMORY
:
906 type
= SYS_RES_MEMORY
;
908 case ACPI_ADR_SPACE_SYSTEM_IO
:
909 type
= SYS_RES_IOPORT
;
915 bus_set_resource(dev
, type
, *rid
, gas
->Address
, gas
->RegisterBitWidth
/ 8);
916 return (bus_alloc_resource_any(dev
, type
, rid
, RF_ACTIVE
));
920 * Handle ISA-like devices probing for a PnP ID to match.
922 #define PNP_EISAID(s) \
923 ((((s[0] - '@') & 0x1f) << 2) \
924 | (((s[1] - '@') & 0x18) >> 3) \
925 | (((s[1] - '@') & 0x07) << 13) \
926 | (((s[2] - '@') & 0x1f) << 8) \
927 | (PNP_HEXTONUM(s[4]) << 16) \
928 | (PNP_HEXTONUM(s[3]) << 20) \
929 | (PNP_HEXTONUM(s[6]) << 24) \
930 | (PNP_HEXTONUM(s[5]) << 28))
933 acpi_isa_get_logicalid(device_t dev
)
935 ACPI_DEVICE_INFO
*devinfo
;
942 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
946 buf
.Length
= ACPI_ALLOCATE_BUFFER
;
950 /* Fetch and validate the HID. */
951 if ((h
= acpi_get_handle(dev
)) == NULL
)
953 error
= AcpiGetObjectInfo(h
, &buf
);
954 if (ACPI_FAILURE(error
))
956 devinfo
= (ACPI_DEVICE_INFO
*)buf
.Pointer
;
958 if ((devinfo
->Valid
& ACPI_VALID_HID
) != 0)
959 pnpid
= PNP_EISAID(devinfo
->HardwareId
.Value
);
962 if (buf
.Pointer
!= NULL
)
963 AcpiOsFree(buf
.Pointer
);
965 return_VALUE (pnpid
);
969 acpi_isa_get_compatid(device_t dev
, uint32_t *cids
, int count
)
971 ACPI_DEVICE_INFO
*devinfo
;
979 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
984 buf
.Length
= ACPI_ALLOCATE_BUFFER
;
988 /* Fetch and validate the CID */
989 if ((h
= acpi_get_handle(dev
)) == NULL
)
991 error
= AcpiGetObjectInfo(h
, &buf
);
992 if (ACPI_FAILURE(error
))
994 devinfo
= (ACPI_DEVICE_INFO
*)buf
.Pointer
;
995 if ((devinfo
->Valid
& ACPI_VALID_CID
) == 0)
998 if (devinfo
->CompatibilityId
.Count
< count
)
999 count
= devinfo
->CompatibilityId
.Count
;
1000 for (i
= 0; i
< count
; i
++) {
1001 if (strncmp(devinfo
->CompatibilityId
.Id
[i
].Value
, "PNP", 3) != 0)
1003 *pnpid
++ = PNP_EISAID(devinfo
->CompatibilityId
.Id
[i
].Value
);
1008 if (buf
.Pointer
!= NULL
)
1009 AcpiOsFree(buf
.Pointer
);
1011 return_VALUE (valid
);
1015 acpi_isa_pnp_probe(device_t bus
, device_t child
, struct isa_pnp_id
*ids
)
1017 int result
, cid_count
, i
;
1018 uint32_t lid
, cids
[8];
1020 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
1023 * ISA-style drivers attached to ACPI may persist and
1024 * probe manually if we return ENOENT. We never want
1025 * that to happen, so don't ever return it.
1029 /* Scan the supplied IDs for a match */
1030 lid
= acpi_isa_get_logicalid(child
);
1031 cid_count
= acpi_isa_get_compatid(child
, cids
, 8);
1032 while (ids
&& ids
->ip_id
) {
1033 if (lid
== ids
->ip_id
) {
1037 for (i
= 0; i
< cid_count
; i
++) {
1038 if (cids
[i
] == ids
->ip_id
) {
1047 return_VALUE (result
);
1051 * Scan relevant portions of the ACPI namespace and attach child devices.
1053 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and
1054 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec.
1057 acpi_probe_children(device_t bus
)
1061 static char *scopes
[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL
};
1064 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
1067 /* Create any static children by calling device identify methods. */
1068 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS
, "device identify routines\n"));
1069 bus_generic_probe(bus
);
1072 * Scan the namespace and insert placeholders for all the devices that
1075 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1076 * we want to create nodes for all devices, not just those that are
1077 * currently present. (This assumes that we don't want to create/remove
1078 * devices as they appear, which might be smarter.)
1080 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS
, "namespace scan\n"));
1081 for (i
= 0; scopes
[i
] != NULL
; i
++) {
1082 status
= AcpiGetHandle(ACPI_ROOT_OBJECT
, scopes
[i
], &parent
);
1083 if (ACPI_SUCCESS(status
)) {
1084 AcpiWalkNamespace(ACPI_TYPE_ANY
, parent
, 100, acpi_probe_child
,
1090 * Scan all of the child devices we have created and let them probe/attach.
1092 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS
, "first bus_generic_attach\n"));
1093 bus_generic_attach(bus
);
1096 * Some of these children may have attached others as part of their attach
1097 * process (eg. the root PCI bus driver), so rescan.
1099 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS
, "second bus_generic_attach\n"));
1100 bus_generic_attach(bus
);
1102 /* Attach wake sysctls. */
1103 acpi_wake_sysctl_walk(bus
);
1105 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS
, "done attaching children\n"));
1110 * Evaluate a child device and determine whether we might attach a device to
1114 acpi_probe_child(ACPI_HANDLE handle
, UINT32 level
, void *context
, void **status
)
1116 ACPI_OBJECT_TYPE type
;
1117 device_t child
, bus
= (device_t
)context
;
1119 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
1121 /* Skip this device if we think we'll have trouble with it. */
1122 if (acpi_avoid(handle
)) {
1123 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS
, "not scanning '%s'\n",
1124 acpi_name(handle
)));
1125 return_ACPI_STATUS (AE_OK
);
1128 if (ACPI_SUCCESS(AcpiGetType(handle
, &type
))) {
1130 case ACPI_TYPE_DEVICE
:
1131 case ACPI_TYPE_PROCESSOR
:
1132 case ACPI_TYPE_THERMAL
:
1133 case ACPI_TYPE_POWER
:
1134 if (acpi_disabled("children"))
1138 * Create a placeholder device for this node. Sort the placeholder
1139 * so that the probe/attach passes will run breadth-first.
1141 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS
, "scanning '%s'\n",
1142 acpi_name(handle
)));
1143 child
= BUS_ADD_CHILD(bus
, level
* 10, NULL
, -1);
1146 acpi_set_handle(child
, handle
);
1148 /* Check if the device can generate wake events. */
1149 if (ACPI_SUCCESS(AcpiEvaluateObject(handle
, "_PRW", NULL
, NULL
)))
1150 device_set_flags(child
, ACPI_FLAG_WAKE_CAPABLE
);
1153 * Check that the device is present. If it's not present,
1154 * leave it disabled (so that we have a device_t attached to
1155 * the handle, but we don't probe it).
1157 if (type
== ACPI_TYPE_DEVICE
&& !acpi_DeviceIsPresent(child
)) {
1158 device_disable(child
);
1163 * Get the device's resource settings and attach them.
1164 * Note that if the device has _PRS but no _CRS, we need
1165 * to decide when it's appropriate to try to configure the
1166 * device. Ignore the return value here; it's OK for the
1167 * device not to have any resources.
1169 acpi_parse_resources(child
, handle
, &acpi_res_parse_set
, NULL
);
1171 /* If we're debugging, probe/attach now rather than later */
1172 ACPI_DEBUG_EXEC(device_probe_and_attach(child
));
1177 return_ACPI_STATUS (AE_OK
);
1181 acpi_shutdown_pre_sync(void *arg
, int howto
)
1183 struct acpi_softc
*sc
= arg
;
1188 * Disable all ACPI events before soft off, otherwise the system
1189 * will be turned on again on some laptops.
1191 * XXX this should probably be restricted to masking some events just
1192 * before powering down, since we may still need ACPI during the
1195 if (sc
->acpi_disable_on_poweroff
)
1200 acpi_shutdown_final(void *arg
, int howto
)
1206 * If powering off, run the actual shutdown code on each processor.
1207 * It will only perform the shutdown on the BSP. Some chipsets do
1208 * not power off the system correctly if called from an AP.
1210 if ((howto
& RB_POWEROFF
) != 0) {
1211 status
= AcpiEnterSleepStatePrep(ACPI_STATE_S5
);
1212 if (ACPI_FAILURE(status
)) {
1213 printf("AcpiEnterSleepStatePrep failed - %s\n",
1214 AcpiFormatException(status
));
1217 printf("Powering system off using ACPI\n");
1218 acpi_shutdown_poweroff(NULL
);
1220 printf("Shutting down ACPI\n");
1226 * Since this function may be called with locks held or in an unknown
1227 * context, it cannot allocate memory, acquire locks, sleep, etc.
1230 acpi_shutdown_poweroff(void *arg
)
1236 /* Only attempt to power off if this is the BSP (cpuid 0). */
1237 if (mdcpu
->mi
.gd_cpuid
!= 0)
1240 ACPI_DISABLE_IRQS();
1241 status
= AcpiEnterSleepState(ACPI_STATE_S5
);
1242 if (ACPI_FAILURE(status
)) {
1243 printf("ACPI power-off failed - %s\n", AcpiFormatException(status
));
1246 printf("ACPI power-off failed - timeout\n");
1251 acpi_enable_fixed_events(struct acpi_softc
*sc
)
1253 static int first_time
= 1;
1257 /* Enable and clear fixed events and install handlers. */
1258 if (AcpiGbl_FADT
!= NULL
&& AcpiGbl_FADT
->PwrButton
== 0) {
1259 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON
);
1260 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON
,
1261 acpi_event_power_button_sleep
, sc
);
1263 device_printf(sc
->acpi_dev
, "Power Button (fixed)\n");
1265 if (AcpiGbl_FADT
!= NULL
&& AcpiGbl_FADT
->SleepButton
== 0) {
1266 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON
);
1267 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON
,
1268 acpi_event_sleep_button_sleep
, sc
);
1270 device_printf(sc
->acpi_dev
, "Sleep Button (fixed)\n");
1277 * Returns true if the device is actually present and should
1278 * be attached to. This requires the present, enabled, UI-visible
1279 * and diagnostics-passed bits to be set.
1282 acpi_DeviceIsPresent(device_t dev
)
1284 ACPI_DEVICE_INFO
*devinfo
;
1293 if ((h
= acpi_get_handle(dev
)) == NULL
)
1296 buf
.Length
= ACPI_ALLOCATE_BUFFER
;
1297 error
= AcpiGetObjectInfo(h
, &buf
);
1298 if (ACPI_FAILURE(error
))
1300 devinfo
= (ACPI_DEVICE_INFO
*)buf
.Pointer
;
1302 /* If no _STA method, must be present */
1303 if ((devinfo
->Valid
& ACPI_VALID_STA
) == 0)
1306 /* Return true for 'present' and 'functioning' */
1307 if ((devinfo
->CurrentStatus
& 0x9) == 0x9)
1310 AcpiOsFree(buf
.Pointer
);
1315 * Returns true if the battery is actually present and inserted.
1318 acpi_BatteryIsPresent(device_t dev
)
1320 ACPI_DEVICE_INFO
*devinfo
;
1329 if ((h
= acpi_get_handle(dev
)) == NULL
)
1332 buf
.Length
= ACPI_ALLOCATE_BUFFER
;
1333 error
= AcpiGetObjectInfo(h
, &buf
);
1334 if (ACPI_FAILURE(error
))
1336 devinfo
= (ACPI_DEVICE_INFO
*)buf
.Pointer
;
1338 /* If no _STA method, must be present */
1339 if ((devinfo
->Valid
& ACPI_VALID_STA
) == 0)
1342 /* Return true for 'present' and 'functioning' */
1343 if ((devinfo
->CurrentStatus
& 0x19) == 0x19)
1346 AcpiOsFree(buf
.Pointer
);
1351 * Match a HID string against a device
1354 acpi_MatchHid(device_t dev
, char *hid
)
1356 ACPI_DEVICE_INFO
*devinfo
;
1367 if ((h
= acpi_get_handle(dev
)) == NULL
)
1370 buf
.Length
= ACPI_ALLOCATE_BUFFER
;
1371 error
= AcpiGetObjectInfo(h
, &buf
);
1372 if (ACPI_FAILURE(error
))
1374 devinfo
= (ACPI_DEVICE_INFO
*)buf
.Pointer
;
1376 if ((devinfo
->Valid
& ACPI_VALID_HID
) != 0 &&
1377 strcmp(hid
, devinfo
->HardwareId
.Value
) == 0)
1379 else if ((devinfo
->Valid
& ACPI_VALID_CID
) != 0) {
1380 for (i
= 0; i
< devinfo
->CompatibilityId
.Count
; i
++) {
1381 if (strcmp(hid
, devinfo
->CompatibilityId
.Id
[i
].Value
) == 0) {
1388 AcpiOsFree(buf
.Pointer
);
1393 * Return the handle of a named object within our scope, ie. that of (parent)
1394 * or one if its parents.
1397 acpi_GetHandleInScope(ACPI_HANDLE parent
, char *path
, ACPI_HANDLE
*result
)
1404 /* Walk back up the tree to the root */
1406 status
= AcpiGetHandle(parent
, path
, &r
);
1407 if (ACPI_SUCCESS(status
)) {
1411 if (status
!= AE_NOT_FOUND
)
1413 if (ACPI_FAILURE(AcpiGetParent(parent
, &r
)))
1414 return (AE_NOT_FOUND
);
1419 /* Find the difference between two PM tick counts. */
1421 acpi_TimerDelta(uint32_t end
, uint32_t start
)
1426 delta
= end
- start
;
1427 else if (AcpiGbl_FADT
->TmrValExt
== 0)
1428 delta
= ((0x00FFFFFF - start
) + end
+ 1) & 0x00FFFFFF;
1430 delta
= ((0xFFFFFFFF - start
) + end
+ 1);
1435 * Allocate a buffer with a preset data size.
1438 acpi_AllocBuffer(int size
)
1442 buf
= malloc(size
+ sizeof(*buf
), M_ACPIDEV
, M_INTWAIT
);
1444 buf
->Pointer
= (void *)(buf
+ 1);
1449 acpi_SetInteger(ACPI_HANDLE handle
, char *path
, UINT32 number
)
1452 ACPI_OBJECT_LIST args
;
1456 arg1
.Type
= ACPI_TYPE_INTEGER
;
1457 arg1
.Integer
.Value
= number
;
1459 args
.Pointer
= &arg1
;
1461 return (AcpiEvaluateObject(handle
, path
, &args
, NULL
));
1465 * Evaluate a path that should return an integer.
1468 acpi_GetInteger(ACPI_HANDLE handle
, char *path
, UINT32
*number
)
1477 handle
= ACPI_ROOT_OBJECT
;
1480 * Assume that what we've been pointed at is an Integer object, or
1481 * a method that will return an Integer.
1483 buf
.Pointer
= ¶m
;
1484 buf
.Length
= sizeof(param
);
1485 status
= AcpiEvaluateObject(handle
, path
, NULL
, &buf
);
1486 if (ACPI_SUCCESS(status
)) {
1487 if (param
.Type
== ACPI_TYPE_INTEGER
)
1488 *number
= param
.Integer
.Value
;
1494 * In some applications, a method that's expected to return an Integer
1495 * may instead return a Buffer (probably to simplify some internal
1496 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1497 * convert it into an Integer as best we can.
1501 if (status
== AE_BUFFER_OVERFLOW
) {
1502 if ((buf
.Pointer
= AcpiOsAllocate(buf
.Length
)) == NULL
) {
1503 status
= AE_NO_MEMORY
;
1505 status
= AcpiEvaluateObject(handle
, path
, NULL
, &buf
);
1506 if (ACPI_SUCCESS(status
))
1507 status
= acpi_ConvertBufferToInteger(&buf
, number
);
1508 AcpiOsFree(buf
.Pointer
);
1515 acpi_ConvertBufferToInteger(ACPI_BUFFER
*bufp
, UINT32
*number
)
1521 p
= (ACPI_OBJECT
*)bufp
->Pointer
;
1522 if (p
->Type
== ACPI_TYPE_INTEGER
) {
1523 *number
= p
->Integer
.Value
;
1526 if (p
->Type
!= ACPI_TYPE_BUFFER
)
1528 if (p
->Buffer
.Length
> sizeof(int))
1529 return (AE_BAD_DATA
);
1532 val
= p
->Buffer
.Pointer
;
1533 for (i
= 0; i
< p
->Buffer
.Length
; i
++)
1534 *number
+= val
[i
] << (i
* 8);
1539 * Iterate over the elements of an a package object, calling the supplied
1540 * function for each element.
1542 * XXX possible enhancement might be to abort traversal on error.
1545 acpi_ForeachPackageObject(ACPI_OBJECT
*pkg
,
1546 void (*func
)(ACPI_OBJECT
*comp
, void *arg
), void *arg
)
1551 if (pkg
== NULL
|| pkg
->Type
!= ACPI_TYPE_PACKAGE
)
1552 return (AE_BAD_PARAMETER
);
1554 /* Iterate over components */
1556 comp
= pkg
->Package
.Elements
;
1557 for (; i
< pkg
->Package
.Count
; i
++, comp
++)
1564 * Find the (index)th resource object in a set.
1567 acpi_FindIndexedResource(ACPI_BUFFER
*buf
, int index
, ACPI_RESOURCE
**resp
)
1572 rp
= (ACPI_RESOURCE
*)buf
->Pointer
;
1576 if (rp
> (ACPI_RESOURCE
*)((u_int8_t
*)buf
->Pointer
+ buf
->Length
))
1577 return (AE_BAD_PARAMETER
);
1579 /* Check for terminator */
1580 if (rp
->Id
== ACPI_RSTYPE_END_TAG
|| rp
->Length
== 0)
1581 return (AE_NOT_FOUND
);
1582 rp
= ACPI_NEXT_RESOURCE(rp
);
1591 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
1593 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
1594 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
1595 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
1598 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
1601 acpi_AppendBufferResource(ACPI_BUFFER
*buf
, ACPI_RESOURCE
*res
)
1606 /* Initialise the buffer if necessary. */
1607 if (buf
->Pointer
== NULL
) {
1608 buf
->Length
= ACPI_INITIAL_RESOURCE_BUFFER_SIZE
;
1609 if ((buf
->Pointer
= AcpiOsAllocate(buf
->Length
)) == NULL
)
1610 return (AE_NO_MEMORY
);
1611 rp
= (ACPI_RESOURCE
*)buf
->Pointer
;
1612 rp
->Id
= ACPI_RSTYPE_END_TAG
;
1619 * Scan the current buffer looking for the terminator.
1620 * This will either find the terminator or hit the end
1621 * of the buffer and return an error.
1623 rp
= (ACPI_RESOURCE
*)buf
->Pointer
;
1625 /* Range check, don't go outside the buffer */
1626 if (rp
>= (ACPI_RESOURCE
*)((u_int8_t
*)buf
->Pointer
+ buf
->Length
))
1627 return (AE_BAD_PARAMETER
);
1628 if (rp
->Id
== ACPI_RSTYPE_END_TAG
|| rp
->Length
== 0)
1630 rp
= ACPI_NEXT_RESOURCE(rp
);
1634 * Check the size of the buffer and expand if required.
1637 * size of existing resources before terminator +
1638 * size of new resource and header +
1639 * size of terminator.
1641 * Note that this loop should really only run once, unless
1642 * for some reason we are stuffing a *really* huge resource.
1644 while ((((u_int8_t
*)rp
- (u_int8_t
*)buf
->Pointer
) +
1645 res
->Length
+ ACPI_RESOURCE_LENGTH_NO_DATA
+
1646 ACPI_RESOURCE_LENGTH
) >= buf
->Length
) {
1647 if ((newp
= AcpiOsAllocate(buf
->Length
* 2)) == NULL
)
1648 return (AE_NO_MEMORY
);
1649 bcopy(buf
->Pointer
, newp
, buf
->Length
);
1650 rp
= (ACPI_RESOURCE
*)((u_int8_t
*)newp
+
1651 ((u_int8_t
*)rp
- (u_int8_t
*)buf
->Pointer
));
1652 AcpiOsFree(buf
->Pointer
);
1653 buf
->Pointer
= newp
;
1654 buf
->Length
+= buf
->Length
;
1657 /* Insert the new resource. */
1658 bcopy(res
, rp
, res
->Length
+ ACPI_RESOURCE_LENGTH_NO_DATA
);
1660 /* And add the terminator. */
1661 rp
= ACPI_NEXT_RESOURCE(rp
);
1662 rp
->Id
= ACPI_RSTYPE_END_TAG
;
1669 * Set interrupt model.
1672 acpi_SetIntrModel(int model
)
1674 return (acpi_SetInteger(ACPI_ROOT_OBJECT
, "_PIC", model
));
1677 #define ACPI_MINIMUM_AWAKETIME 5
1680 acpi_sleep_enable(void *arg
)
1682 ((struct acpi_softc
*)arg
)->acpi_sleep_disabled
= 0;
1686 * Set the system sleep state
1688 * Currently we support S1-S5 but S4 is only S4BIOS
1691 acpi_SetSleepState(struct acpi_softc
*sc
, int state
)
1693 ACPI_STATUS status
= AE_OK
;
1697 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__
, state
);
1700 /* Avoid reentry if already attempting to suspend. */
1701 if (sc
->acpi_sstate
!= ACPI_STATE_S0
)
1702 return_ACPI_STATUS (AE_BAD_PARAMETER
);
1704 /* We recently woke up so don't suspend again for a while. */
1705 if (sc
->acpi_sleep_disabled
)
1706 return_ACPI_STATUS (AE_OK
);
1713 status
= AcpiGetSleepTypeData((UINT8
)state
, &TypeA
, &TypeB
);
1714 if (status
== AE_NOT_FOUND
) {
1715 device_printf(sc
->acpi_dev
,
1716 "Sleep state S%d not supported by BIOS\n", state
);
1718 } else if (ACPI_FAILURE(status
)) {
1719 device_printf(sc
->acpi_dev
, "AcpiGetSleepTypeData failed - %s\n",
1720 AcpiFormatException(status
));
1724 sc
->acpi_sstate
= state
;
1725 sc
->acpi_sleep_disabled
= 1;
1727 /* Disable all wake GPEs not appropriate for this state. */
1728 acpi_wake_limit_walk(state
);
1730 /* Inform all devices that we are going to sleep. */
1731 if (DEVICE_SUSPEND(root_bus
) != 0) {
1733 * Re-wake the system.
1735 * XXX note that a better two-pass approach with a 'veto' pass
1736 * followed by a "real thing" pass would be better, but the
1737 * current bus interface does not provide for this.
1739 DEVICE_RESUME(root_bus
);
1740 return_ACPI_STATUS (AE_ERROR
);
1743 status
= AcpiEnterSleepStatePrep(state
);
1744 if (ACPI_FAILURE(status
)) {
1745 device_printf(sc
->acpi_dev
, "AcpiEnterSleepStatePrep failed - %s\n",
1746 AcpiFormatException(status
));
1750 if (sc
->acpi_sleep_delay
> 0)
1751 DELAY(sc
->acpi_sleep_delay
* 1000000);
1753 if (state
!= ACPI_STATE_S1
) {
1754 acpi_sleep_machdep(sc
, state
);
1756 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */
1757 if (AcpiGbl_MutexInfo
[ACPI_MTX_HARDWARE
].OwnerId
!=
1758 ACPI_MUTEX_NOT_ACQUIRED
) {
1760 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE
);
1763 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
1764 if (state
== ACPI_STATE_S4
)
1767 status
= AcpiEnterSleepState((UINT8
)state
);
1768 if (ACPI_FAILURE(status
)) {
1769 device_printf(sc
->acpi_dev
, "AcpiEnterSleepState failed - %s\n",
1770 AcpiFormatException(status
));
1774 AcpiLeaveSleepState((UINT8
)state
);
1775 DEVICE_RESUME(root_bus
);
1776 sc
->acpi_sstate
= ACPI_STATE_S0
;
1777 acpi_enable_fixed_events(sc
);
1781 * Shut down cleanly and power off. This will call us back through the
1782 * shutdown handlers.
1784 shutdown_nice(RB_POWEROFF
);
1788 status
= AE_BAD_PARAMETER
;
1792 /* Disable a second sleep request for a short period */
1793 if (sc
->acpi_sleep_disabled
)
1794 callout_reset(&sc
->acpi_sleep_timer
, hz
* ACPI_MINIMUM_AWAKETIME
,
1795 acpi_sleep_enable
, sc
);
1797 return_ACPI_STATUS (status
);
1800 /* Initialize a device's wake GPE. */
1802 acpi_wake_init(device_t dev
, int type
)
1804 struct acpi_prw_data prw
;
1806 /* Check that the device can wake the system. */
1807 if ((device_get_flags(dev
) & ACPI_FLAG_WAKE_CAPABLE
) == 0)
1810 /* Evaluate _PRW to find the GPE. */
1811 if (acpi_parse_prw(acpi_get_handle(dev
), &prw
) != 0)
1814 /* Set the requested type for the GPE (runtime, wake, or both). */
1815 if (ACPI_FAILURE(AcpiSetGpeType(prw
.gpe_handle
, prw
.gpe_bit
, type
))) {
1816 device_printf(dev
, "set GPE type failed\n");
1823 /* Enable or disable the device's wake GPE. */
1825 acpi_wake_set_enable(device_t dev
, int enable
)
1827 struct acpi_prw_data prw
;
1832 /* Make sure the device supports waking the system. */
1833 flags
= device_get_flags(dev
);
1834 handle
= acpi_get_handle(dev
);
1835 if ((flags
& ACPI_FLAG_WAKE_CAPABLE
) == 0 || handle
== NULL
)
1838 /* Evaluate _PRW to find the GPE. */
1839 if (acpi_parse_prw(handle
, &prw
) != 0)
1843 status
= AcpiEnableGpe(prw
.gpe_handle
, prw
.gpe_bit
, ACPI_NOT_ISR
);
1844 if (ACPI_FAILURE(status
)) {
1845 device_printf(dev
, "enable wake failed\n");
1848 device_set_flags(dev
, flags
| ACPI_FLAG_WAKE_ENABLED
);
1850 status
= AcpiDisableGpe(prw
.gpe_handle
, prw
.gpe_bit
, ACPI_NOT_ISR
);
1851 if (ACPI_FAILURE(status
)) {
1852 device_printf(dev
, "disable wake failed\n");
1855 device_set_flags(dev
, flags
& ~ACPI_FLAG_WAKE_ENABLED
);
1861 /* Configure a device's GPE appropriately for the new sleep state. */
1863 acpi_wake_sleep_prep(device_t dev
, int sstate
)
1865 struct acpi_prw_data prw
;
1869 /* Check that this is an ACPI device and get its GPE. */
1870 flags
= device_get_flags(dev
);
1871 handle
= acpi_get_handle(dev
);
1872 if ((flags
& ACPI_FLAG_WAKE_CAPABLE
) == 0 || handle
== NULL
)
1875 /* Evaluate _PRW to find the GPE. */
1876 if (acpi_parse_prw(handle
, &prw
) != 0)
1880 * TBD: All Power Resources referenced by elements 2 through N
1881 * of the _PRW object are put into the ON state.
1885 * If the user requested that this device wake the system and the next
1886 * sleep state is valid for this GPE, enable it and the device's wake
1887 * capability. The sleep state must be less than (i.e., higher power)
1888 * or equal to the value specified by _PRW. Return early, leaving
1889 * the appropriate power resources enabled.
1891 if ((flags
& ACPI_FLAG_WAKE_ENABLED
) != 0 &&
1892 sstate
<= prw
.lowest_wake
) {
1894 device_printf(dev
, "wake_prep enabled gpe %#x for state %d\n",
1895 prw
.gpe_bit
, sstate
);
1896 AcpiEnableGpe(prw
.gpe_handle
, prw
.gpe_bit
, ACPI_NOT_ISR
);
1897 acpi_SetInteger(handle
, "_PSW", 1);
1902 * If the device wake was disabled or this sleep state is too low for
1903 * this device, disable its wake capability and GPE.
1905 AcpiDisableGpe(prw
.gpe_handle
, prw
.gpe_bit
, ACPI_NOT_ISR
);
1906 acpi_SetInteger(handle
, "_PSW", 0);
1908 device_printf(dev
, "wake_prep disabled gpe %#x for state %d\n",
1909 prw
.gpe_bit
, sstate
);
1912 * TBD: All Power Resources referenced by elements 2 through N
1913 * of the _PRW object are put into the OFF state.
1919 /* Re-enable GPEs after wake. */
1921 acpi_wake_run_prep(device_t dev
)
1923 struct acpi_prw_data prw
;
1927 /* Check that this is an ACPI device and get its GPE. */
1928 flags
= device_get_flags(dev
);
1929 handle
= acpi_get_handle(dev
);
1930 if ((flags
& ACPI_FLAG_WAKE_CAPABLE
) == 0 || handle
== NULL
)
1933 /* Evaluate _PRW to find the GPE. */
1934 if (acpi_parse_prw(handle
, &prw
) != 0)
1938 * TBD: Be sure all Power Resources referenced by elements 2 through N
1939 * of the _PRW object are in the ON state.
1942 /* Disable wake capability and if the user requested, enable the GPE. */
1943 acpi_SetInteger(handle
, "_PSW", 0);
1944 if ((flags
& ACPI_FLAG_WAKE_ENABLED
) != 0)
1945 AcpiEnableGpe(prw
.gpe_handle
, prw
.gpe_bit
, ACPI_NOT_ISR
);
1950 acpi_wake_limit(ACPI_HANDLE h
, UINT32 level
, void *context
, void **status
)
1952 struct acpi_prw_data prw
;
1955 /* It's ok not to have _PRW if the device can't wake the system. */
1956 if (acpi_parse_prw(h
, &prw
) != 0)
1959 sstate
= (int *)context
;
1960 if (*sstate
> prw
.lowest_wake
)
1961 AcpiDisableGpe(prw
.gpe_handle
, prw
.gpe_bit
, ACPI_NOT_ISR
);
1966 /* Walk all system devices, disabling them if necessary for sstate. */
1968 acpi_wake_limit_walk(int sstate
)
1970 ACPI_HANDLE sb_handle
;
1972 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT
, "\\_SB_", &sb_handle
)))
1973 AcpiWalkNamespace(ACPI_TYPE_ANY
, sb_handle
, 100,
1974 acpi_wake_limit
, &sstate
, NULL
);
1978 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
1980 acpi_wake_sysctl_walk(device_t dev
)
1982 int error
, i
, numdevs
;
1986 error
= device_get_children(dev
, &devlist
, &numdevs
);
1987 if (error
!= 0 || numdevs
== 0)
1989 for (i
= 0; i
< numdevs
; i
++) {
1991 if (!device_is_attached(child
))
1993 if (device_get_flags(child
) & ACPI_FLAG_WAKE_CAPABLE
) {
1995 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child
),
1996 SYSCTL_CHILDREN(device_get_sysctl_tree(child
)), OID_AUTO
,
1997 "wake", CTLTYPE_INT
| CTLFLAG_RW
, child
, 0,
1998 acpi_wake_set_sysctl
, "I", "Device set to wake the system");
1999 #endif /* dfly_notyet */
2001 acpi_wake_sysctl_walk(child
);
2003 free(devlist
, M_TEMP
);
2009 /* Enable or disable wake from userland. */
2011 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS
)
2016 dev
= (device_t
)arg1
;
2017 enable
= (device_get_flags(dev
) & ACPI_FLAG_WAKE_ENABLED
) ? 1 : 0;
2019 error
= sysctl_handle_int(oidp
, &enable
, 0, req
);
2020 if (error
!= 0 || req
->newptr
== NULL
)
2022 if (enable
!= 0 && enable
!= 1)
2025 return (acpi_wake_set_enable(dev
, enable
));
2027 #endif /* dfly_notyet */
2029 /* Parse a device's _PRW into a structure. */
2031 acpi_parse_prw(ACPI_HANDLE h
, struct acpi_prw_data
*prw
)
2034 ACPI_BUFFER prw_buffer
;
2035 ACPI_OBJECT
*res
, *res2
;
2038 if (h
== NULL
|| prw
== NULL
)
2042 * The _PRW object (7.2.9) is only required for devices that have the
2043 * ability to wake the system from a sleeping state.
2046 prw_buffer
.Pointer
= NULL
;
2047 prw_buffer
.Length
= ACPI_ALLOCATE_BUFFER
;
2048 status
= AcpiEvaluateObject(h
, "_PRW", NULL
, &prw_buffer
);
2049 if (ACPI_FAILURE(status
))
2051 res
= (ACPI_OBJECT
*)prw_buffer
.Pointer
;
2054 if (!ACPI_PKG_VALID(res
, 2))
2058 * Element 1 of the _PRW object:
2059 * The lowest power system sleeping state that can be entered while still
2060 * providing wake functionality. The sleeping state being entered must
2061 * be less than (i.e., higher power) or equal to this value.
2063 if (acpi_PkgInt32(res
, 1, &prw
->lowest_wake
) != 0)
2067 * Element 0 of the _PRW object:
2069 switch (res
->Package
.Elements
[0].Type
) {
2070 case ACPI_TYPE_INTEGER
:
2072 * If the data type of this package element is numeric, then this
2073 * _PRW package element is the bit index in the GPEx_EN, in the
2074 * GPE blocks described in the FADT, of the enable bit that is
2075 * enabled for the wake event.
2077 prw
->gpe_handle
= NULL
;
2078 prw
->gpe_bit
= res
->Package
.Elements
[0].Integer
.Value
;
2081 case ACPI_TYPE_PACKAGE
:
2083 * If the data type of this package element is a package, then this
2084 * _PRW package element is itself a package containing two
2085 * elements. The first is an object reference to the GPE Block
2086 * device that contains the GPE that will be triggered by the wake
2087 * event. The second element is numeric and it contains the bit
2088 * index in the GPEx_EN, in the GPE Block referenced by the
2089 * first element in the package, of the enable bit that is enabled for
2092 * For example, if this field is a package then it is of the form:
2093 * Package() {\_SB.PCI0.ISA.GPE, 2}
2095 res2
= &res
->Package
.Elements
[0];
2096 if (!ACPI_PKG_VALID(res2
, 2))
2098 prw
->gpe_handle
= acpi_GetReference(NULL
, &res2
->Package
.Elements
[0]);
2099 if (prw
->gpe_handle
== NULL
)
2101 if (acpi_PkgInt32(res2
, 1, &prw
->gpe_bit
) != 0)
2109 /* XXX No power resource handling yet. */
2110 prw
->power_res
= NULL
;
2113 if (prw_buffer
.Pointer
!= NULL
)
2114 AcpiOsFree(prw_buffer
.Pointer
);
2119 * Enable/Disable ACPI
2122 acpi_Enable(struct acpi_softc
*sc
)
2127 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
2130 flags
= ACPI_NO_ADDRESS_SPACE_INIT
| ACPI_NO_HARDWARE_INIT
|
2131 ACPI_NO_DEVICE_INIT
| ACPI_NO_OBJECT_INIT
;
2132 if (!sc
->acpi_enabled
)
2133 status
= AcpiEnableSubsystem(flags
);
2137 if (status
== AE_OK
)
2138 sc
->acpi_enabled
= 1;
2140 return_ACPI_STATUS (status
);
2144 acpi_Disable(struct acpi_softc
*sc
)
2148 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
2151 if (sc
->acpi_enabled
)
2152 status
= AcpiDisable();
2156 if (status
== AE_OK
)
2157 sc
->acpi_enabled
= 0;
2159 return_ACPI_STATUS (status
);
2163 * ACPI Event Handlers
2166 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2169 acpi_system_eventhandler_sleep(void *arg
, int state
)
2172 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__
, state
);
2175 if (state
>= ACPI_STATE_S0
&& state
<= ACPI_S_STATES_MAX
)
2176 acpi_SetSleepState((struct acpi_softc
*)arg
, state
);
2182 acpi_system_eventhandler_wakeup(void *arg
, int state
)
2185 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__
, state
);
2187 /* Well, what to do? :-) */
2196 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2199 acpi_event_power_button_sleep(void *context
)
2201 struct acpi_softc
*sc
= (struct acpi_softc
*)context
;
2203 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
2205 EVENTHANDLER_INVOKE(acpi_sleep_event
, sc
->acpi_power_button_sx
);
2207 return_VALUE (ACPI_INTERRUPT_HANDLED
);
2211 acpi_event_power_button_wake(void *context
)
2213 struct acpi_softc
*sc
= (struct acpi_softc
*)context
;
2215 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
2217 EVENTHANDLER_INVOKE(acpi_wakeup_event
, sc
->acpi_power_button_sx
);
2219 return_VALUE (ACPI_INTERRUPT_HANDLED
);
2223 acpi_event_sleep_button_sleep(void *context
)
2225 struct acpi_softc
*sc
= (struct acpi_softc
*)context
;
2227 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
2229 EVENTHANDLER_INVOKE(acpi_sleep_event
, sc
->acpi_sleep_button_sx
);
2231 return_VALUE (ACPI_INTERRUPT_HANDLED
);
2235 acpi_event_sleep_button_wake(void *context
)
2237 struct acpi_softc
*sc
= (struct acpi_softc
*)context
;
2239 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
2241 EVENTHANDLER_INVOKE(acpi_wakeup_event
, sc
->acpi_sleep_button_sx
);
2243 return_VALUE (ACPI_INTERRUPT_HANDLED
);
2247 * XXX This is kinda ugly, and should not be here.
2249 struct acpi_staticbuf
{
2255 acpi_name(ACPI_HANDLE handle
)
2257 static struct acpi_staticbuf buf
;
2261 buf
.buffer
.Length
= 512;
2262 buf
.buffer
.Pointer
= &buf
.data
[0];
2264 if (ACPI_SUCCESS(AcpiGetName(handle
, ACPI_FULL_PATHNAME
, &buf
.buffer
)))
2265 return (buf
.buffer
.Pointer
);
2267 return ("(unknown path)");
2271 * Debugging/bug-avoidance. Avoid trying to fetch info on various
2272 * parts of the namespace.
2275 acpi_avoid(ACPI_HANDLE handle
)
2277 char *cp
, *env
, *np
;
2280 np
= acpi_name(handle
);
2283 if ((env
= getenv("debug.acpi.avoid.paths")) == NULL
&&
2284 (env
= getenv("debug.acpi.avoid")) == NULL
)
2287 /* Scan the avoid list checking for a match */
2290 while ((*cp
!= 0) && isspace(*cp
))
2295 while ((cp
[len
] != 0) && !isspace(cp
[len
]))
2297 if (!strncmp(cp
, np
, len
)) {
2309 * Debugging/bug-avoidance. Disable ACPI subsystem components.
2312 acpi_disabled(char *subsys
)
2317 if ((env
= getenv("debug.acpi.disabled")) == NULL
)
2319 if (strcmp(env
, "all") == 0) {
2324 /* Scan the disable list, checking for a match. */
2327 while (*cp
!= '\0' && isspace(*cp
))
2332 while (cp
[len
] != '\0' && !isspace(cp
[len
]))
2334 if (strncmp(cp
, subsys
, len
) == 0) {
2346 * Control interface.
2348 * We multiplex ioctls for all participating ACPI devices here. Individual
2349 * drivers wanting to be accessible via /dev/acpi should use the
2350 * register/deregister interface to make their handlers visible.
2352 struct acpi_ioctl_hook
2354 TAILQ_ENTRY(acpi_ioctl_hook
) link
;
2360 static TAILQ_HEAD(,acpi_ioctl_hook
) acpi_ioctl_hooks
;
2361 static int acpi_ioctl_hooks_initted
;
2364 * Register an ioctl handler.
2367 acpi_register_ioctl(u_long cmd
, acpi_ioctl_fn fn
, void *arg
)
2369 struct acpi_ioctl_hook
*hp
;
2371 hp
= malloc(sizeof(*hp
), M_ACPIDEV
, M_INTWAIT
);
2375 if (acpi_ioctl_hooks_initted
== 0) {
2376 TAILQ_INIT(&acpi_ioctl_hooks
);
2377 acpi_ioctl_hooks_initted
= 1;
2379 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks
, hp
, link
);
2384 * Deregister an ioctl handler.
2387 acpi_deregister_ioctl(u_long cmd
, acpi_ioctl_fn fn
)
2389 struct acpi_ioctl_hook
*hp
;
2391 TAILQ_FOREACH(hp
, &acpi_ioctl_hooks
, link
)
2392 if ((hp
->cmd
== cmd
) && (hp
->fn
== fn
))
2396 TAILQ_REMOVE(&acpi_ioctl_hooks
, hp
, link
);
2397 free(hp
, M_ACPIDEV
);
2402 acpiopen(dev_t dev
, int flag
, int fmt
, d_thread_t
*td
)
2408 acpiclose(dev_t dev
, int flag
, int fmt
, d_thread_t
*td
)
2414 acpiioctl(dev_t dev
, u_long cmd
, caddr_t addr
, int flag
, d_thread_t
*td
)
2416 struct acpi_softc
*sc
;
2417 struct acpi_ioctl_hook
*hp
;
2418 int error
, xerror
, state
;
2427 * Scan the list of registered ioctls, looking for handlers.
2429 if (acpi_ioctl_hooks_initted
) {
2430 TAILQ_FOREACH(hp
, &acpi_ioctl_hooks
, link
) {
2431 if (hp
->cmd
== cmd
) {
2432 xerror
= hp
->fn(cmd
, addr
, hp
->arg
);
2441 * Core ioctls are not permitted for non-writable user.
2442 * Currently, other ioctls just fetch information.
2443 * Not changing system behavior.
2445 if((flag
& FWRITE
) == 0)
2448 /* Core system ioctls. */
2451 if (ACPI_FAILURE(acpi_Enable(sc
)))
2454 case ACPIIO_DISABLE
:
2455 if (ACPI_FAILURE(acpi_Disable(sc
)))
2458 case ACPIIO_SETSLPSTATE
:
2459 if (!sc
->acpi_enabled
) {
2463 state
= *(int *)addr
;
2464 if (state
>= ACPI_STATE_S0
&& state
<= ACPI_S_STATES_MAX
) {
2465 if (ACPI_FAILURE(acpi_SetSleepState(sc
, state
)))
2483 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS
)
2485 char sleep_state
[4];
2488 UINT8 state
, TypeA
, TypeB
;
2491 for (state
= ACPI_STATE_S1
; state
< ACPI_S_STATES_MAX
+ 1; state
++) {
2492 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state
, &TypeA
, &TypeB
))) {
2493 sprintf(sleep_state
, "S%d ", state
);
2494 strcat(buf
, sleep_state
);
2497 error
= sysctl_handle_string(oidp
, buf
, sizeof(buf
), req
);
2502 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS
)
2504 char sleep_state
[10];
2506 u_int new_state
, old_state
;
2508 old_state
= *(u_int
*)oidp
->oid_arg1
;
2509 if (old_state
> ACPI_S_STATES_MAX
+ 1) {
2510 strcpy(sleep_state
, "unknown");
2512 bzero(sleep_state
, sizeof(sleep_state
));
2513 strncpy(sleep_state
, sleep_state_names
[old_state
],
2514 sizeof(sleep_state_names
[old_state
]));
2516 error
= sysctl_handle_string(oidp
, sleep_state
, sizeof(sleep_state
), req
);
2517 if (error
== 0 && req
->newptr
!= NULL
) {
2518 new_state
= ACPI_STATE_S0
;
2519 for (; new_state
<= ACPI_S_STATES_MAX
+ 1; new_state
++) {
2520 if (strncmp(sleep_state
, sleep_state_names
[new_state
],
2521 sizeof(sleep_state
)) == 0)
2524 if (new_state
<= ACPI_S_STATES_MAX
+ 1) {
2525 if (new_state
!= old_state
)
2526 *(u_int
*)oidp
->oid_arg1
= new_state
;
2535 /* Inform devctl(4) when we receive a Notify. */
2537 acpi_UserNotify(const char *subsystem
, ACPI_HANDLE h
, uint8_t notify
)
2539 char notify_buf
[16];
2540 ACPI_BUFFER handle_buf
;
2543 if (subsystem
== NULL
)
2546 handle_buf
.Pointer
= NULL
;
2547 handle_buf
.Length
= ACPI_ALLOCATE_BUFFER
;
2548 status
= AcpiNsHandleToPathname(h
, &handle_buf
);
2549 if (ACPI_FAILURE(status
))
2551 snprintf(notify_buf
, sizeof(notify_buf
), "notify=0x%02x", notify
);
2553 devctl_notify("ACPI", subsystem
, handle_buf
.Pointer
, notify_buf
);
2555 AcpiOsFree(handle_buf
.Pointer
);
2560 * Support for parsing debug options from the kernel environment.
2562 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
2563 * by specifying the names of the bits in the debug.acpi.layer and
2564 * debug.acpi.level environment variables. Bits may be unset by
2565 * prefixing the bit name with !.
2573 static struct debugtag dbg_layer
[] = {
2574 {"ACPI_UTILITIES", ACPI_UTILITIES
},
2575 {"ACPI_HARDWARE", ACPI_HARDWARE
},
2576 {"ACPI_EVENTS", ACPI_EVENTS
},
2577 {"ACPI_TABLES", ACPI_TABLES
},
2578 {"ACPI_NAMESPACE", ACPI_NAMESPACE
},
2579 {"ACPI_PARSER", ACPI_PARSER
},
2580 {"ACPI_DISPATCHER", ACPI_DISPATCHER
},
2581 {"ACPI_EXECUTER", ACPI_EXECUTER
},
2582 {"ACPI_RESOURCES", ACPI_RESOURCES
},
2583 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER
},
2584 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES
},
2585 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER
},
2586 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS
},
2588 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER
},
2589 {"ACPI_BATTERY", ACPI_BATTERY
},
2590 {"ACPI_BUS", ACPI_BUS
},
2591 {"ACPI_BUTTON", ACPI_BUTTON
},
2592 {"ACPI_EC", ACPI_EC
},
2593 {"ACPI_FAN", ACPI_FAN
},
2594 {"ACPI_POWERRES", ACPI_POWERRES
},
2595 {"ACPI_PROCESSOR", ACPI_PROCESSOR
},
2596 {"ACPI_THERMAL", ACPI_THERMAL
},
2597 {"ACPI_TIMER", ACPI_TIMER
},
2598 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS
},
2602 static struct debugtag dbg_level
[] = {
2603 {"ACPI_LV_ERROR", ACPI_LV_ERROR
},
2604 {"ACPI_LV_WARN", ACPI_LV_WARN
},
2605 {"ACPI_LV_INIT", ACPI_LV_INIT
},
2606 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT
},
2607 {"ACPI_LV_INFO", ACPI_LV_INFO
},
2608 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS
},
2610 /* Trace verbosity level 1 [Standard Trace Level] */
2611 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES
},
2612 {"ACPI_LV_PARSE", ACPI_LV_PARSE
},
2613 {"ACPI_LV_LOAD", ACPI_LV_LOAD
},
2614 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH
},
2615 {"ACPI_LV_EXEC", ACPI_LV_EXEC
},
2616 {"ACPI_LV_NAMES", ACPI_LV_NAMES
},
2617 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION
},
2618 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD
},
2619 {"ACPI_LV_TABLES", ACPI_LV_TABLES
},
2620 {"ACPI_LV_VALUES", ACPI_LV_VALUES
},
2621 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS
},
2622 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES
},
2623 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS
},
2624 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE
},
2625 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1
},
2627 /* Trace verbosity level 2 [Function tracing and memory allocation] */
2628 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS
},
2629 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS
},
2630 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS
},
2631 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2
},
2632 {"ACPI_LV_ALL", ACPI_LV_ALL
},
2634 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
2635 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX
},
2636 {"ACPI_LV_THREADS", ACPI_LV_THREADS
},
2637 {"ACPI_LV_IO", ACPI_LV_IO
},
2638 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS
},
2639 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3
},
2641 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
2642 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE
},
2643 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO
},
2644 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES
},
2645 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS
},
2646 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE
},
2651 acpi_parse_debug(char *cp
, struct debugtag
*tag
, UINT32
*flag
)
2663 while (*ep
&& !isspace(*ep
))
2674 for (i
= 0; tag
[i
].name
!= NULL
; i
++) {
2675 if (!strncmp(cp
, tag
[i
].name
, l
)) {
2677 *flag
|= tag
[i
].value
;
2679 *flag
&= ~tag
[i
].value
;
2687 acpi_set_debugging(void *junk
)
2689 char *layer
, *level
;
2696 layer
= getenv("debug.acpi.layer");
2697 level
= getenv("debug.acpi.level");
2698 if (layer
== NULL
&& level
== NULL
)
2701 printf("ACPI set debug");
2702 if (layer
!= NULL
) {
2703 if (strcmp("NONE", layer
) != 0)
2704 printf(" layer '%s'", layer
);
2705 acpi_parse_debug(layer
, &dbg_layer
[0], &AcpiDbgLayer
);
2708 if (level
!= NULL
) {
2709 if (strcmp("NONE", level
) != 0)
2710 printf(" level '%s'", level
);
2711 acpi_parse_debug(level
, &dbg_level
[0], &AcpiDbgLevel
);
2716 SYSINIT(acpi_debugging
, SI_SUB_TUNABLES
, SI_ORDER_ANY
, acpi_set_debugging
,
2720 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS
)
2723 struct debugtag
*tag
;
2726 if (sbuf_new(&sb
, NULL
, 128, SBUF_AUTOEXTEND
) == NULL
)
2728 if (strcmp(oidp
->oid_arg1
, "debug.acpi.layer") == 0) {
2729 tag
= &dbg_layer
[0];
2730 dbg
= &AcpiDbgLayer
;
2732 tag
= &dbg_level
[0];
2733 dbg
= &AcpiDbgLevel
;
2736 /* Get old values if this is a get request. */
2738 sbuf_cpy(&sb
, "NONE");
2739 } else if (req
->newptr
== NULL
) {
2740 for (; tag
->name
!= NULL
; tag
++) {
2741 if ((*dbg
& tag
->value
) == tag
->value
)
2742 sbuf_printf(&sb
, "%s ", tag
->name
);
2748 /* Copy out the old values to the user. */
2749 error
= SYSCTL_OUT(req
, sbuf_data(&sb
), sbuf_len(&sb
));
2752 /* If the user is setting a string, parse it. */
2753 if (error
== 0 && req
->newptr
!= NULL
) {
2755 /* XXX setenv((char *)oidp->oid_arg1, (char *)req->newptr); */
2756 acpi_set_debugging(NULL
);
2761 SYSCTL_PROC(_debug_acpi
, OID_AUTO
, layer
, CTLFLAG_RW
| CTLTYPE_STRING
,
2762 "debug.acpi.layer", 0, acpi_debug_sysctl
, "A", "");
2763 SYSCTL_PROC(_debug_acpi
, OID_AUTO
, level
, CTLFLAG_RW
| CTLTYPE_STRING
,
2764 "debug.acpi.level", 0, acpi_debug_sysctl
, "A", "");
2768 acpi_pm_func(u_long cmd
, void *arg
, ...)
2770 int state
, acpi_state
;
2772 struct acpi_softc
*sc
;
2777 case POWER_CMD_SUSPEND
:
2778 sc
= (struct acpi_softc
*)arg
;
2785 state
= va_arg(ap
, int);
2789 case POWER_SLEEP_STATE_STANDBY
:
2790 acpi_state
= sc
->acpi_standby_sx
;
2792 case POWER_SLEEP_STATE_SUSPEND
:
2793 acpi_state
= sc
->acpi_suspend_sx
;
2795 case POWER_SLEEP_STATE_HIBERNATE
:
2796 acpi_state
= ACPI_STATE_S4
;
2803 acpi_SetSleepState(sc
, acpi_state
);
2815 acpi_pm_register(void *arg
)
2817 if (!cold
|| resource_disabled("acpi", 0))
2820 power_pm_register(POWER_PM_TYPE_ACPI
, acpi_pm_func
, NULL
);
2823 SYSINIT(power
, SI_SUB_KLD
, SI_ORDER_ANY
, acpi_pm_register
, 0);