2 * Copyright (c) 2000 Takanori Watanabe
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/dev/acpica/acpi_acad.c,v 1.39 2009/06/05 18:44:36 jkim Exp
30 #include <sys/param.h>
31 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/module.h>
38 #include <sys/power.h>
42 #include <dev/acpica/acpivar.h>
43 #include <dev/acpica/acpiio.h>
44 #include <bus/isa/isavar.h>
45 #include <bus/isa/pnpvar.h>
47 /* Hooks for the ACPICA debugging infrastructure */
48 #define _COMPONENT ACPI_AC_ADAPTER
49 ACPI_MODULE_NAME("AC_ADAPTER")
51 /* Number of times to retry initialization before giving up. */
52 #define ACPI_ACAD_RETRY_MAX 6
54 #define ACPI_POWERSOURCE_STAT_CHANGE 0x80
58 * Also serves as notification code, when line is unplugged
61 #define ACPI_NOTIFY_CX_STATES 0x81
63 struct acpi_acad_softc
{
67 static void acpi_acad_get_status(void *);
68 static void acpi_acad_notify_handler(ACPI_HANDLE
, UINT32
, void *);
69 static int acpi_acad_probe(device_t
);
70 static int acpi_acad_attach(device_t
);
71 static int acpi_acad_ioctl(u_long
, caddr_t
, void *);
72 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS
);
73 static void acpi_acad_init_acline(void *arg
);
74 static void acpi_acad_ac_only(void *arg
);
76 static device_method_t acpi_acad_methods
[] = {
77 /* Device interface */
78 DEVMETHOD(device_probe
, acpi_acad_probe
),
79 DEVMETHOD(device_attach
, acpi_acad_attach
),
84 static driver_t acpi_acad_driver
= {
87 sizeof(struct acpi_acad_softc
),
88 .gpri
= KOBJ_GPRI_ACPI
91 static devclass_t acpi_acad_devclass
;
92 DRIVER_MODULE(acpi_acad
, acpi
, acpi_acad_driver
, acpi_acad_devclass
, NULL
, NULL
);
93 MODULE_DEPEND(acpi_acad
, acpi
, 1, 1, 1);
95 ACPI_SERIAL_DECL(acad
, "ACPI AC adapter");
97 SYSINIT(acad
, SI_SUB_KTHREAD_IDLE
, SI_ORDER_FIRST
, acpi_acad_ac_only
, NULL
);
100 acpi_acad_get_status(void *context
)
102 struct acpi_acad_softc
*sc
;
108 sc
= device_get_softc(dev
);
109 h
= acpi_get_handle(dev
);
111 acpi_GetInteger(h
, "_PSR", &newstatus
);
113 /* If status is valid and has changed, notify the system. */
114 ACPI_SERIAL_BEGIN(acad
);
115 if (newstatus
!= -1 && sc
->status
!= newstatus
) {
116 sc
->status
= newstatus
;
117 ACPI_SERIAL_END(acad
);
118 power_profile_set_state(newstatus
? POWER_PROFILE_PERFORMANCE
:
119 POWER_PROFILE_ECONOMY
);
120 ACPI_VPRINT(dev
, acpi_device_get_parent_softc(dev
),
121 "%s Line\n", newstatus
? "On" : "Off");
122 acpi_UserNotify("ACAD", h
, newstatus
);
124 ACPI_SERIAL_END(acad
);
129 acpi_acad_notify_handler(ACPI_HANDLE h
, UINT32 notify
, void *context
)
133 dev
= (device_t
)context
;
135 case ACPI_NOTIFY_BUS_CHECK
:
136 case ACPI_NOTIFY_DEVICE_CHECK
:
137 case ACPI_POWERSOURCE_STAT_CHANGE
:
138 case ACPI_NOTIFY_CX_STATES
:
139 /* Temporarily. It is better to notify policy manager */
140 AcpiOsExecute(OSL_NOTIFY_HANDLER
, acpi_acad_get_status
, context
);
143 device_printf(dev
, "unknown notify: %#x\n", notify
);
149 acpi_acad_probe(device_t dev
)
151 static char *acad_ids
[] = { "ACPI0003", NULL
};
153 if (acpi_disabled("acad") ||
154 ACPI_ID_PROBE(device_get_parent(dev
), dev
, acad_ids
) == NULL
)
157 device_set_desc(dev
, "AC Adapter");
162 acpi_acad_attach(device_t dev
)
164 struct acpi_acad_softc
*sc
;
165 struct acpi_softc
*acpi_sc
;
169 sc
= device_get_softc(dev
);
170 handle
= acpi_get_handle(dev
);
172 error
= acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS
, acpi_acad_ioctl
, dev
);
176 ACPI_SERIAL_INIT(acad
);
178 if (device_get_unit(dev
) == 0) {
179 acpi_sc
= acpi_device_get_parent_softc(dev
);
180 SYSCTL_ADD_PROC(&acpi_sc
->acpi_sysctl_ctx
,
181 SYSCTL_CHILDREN(acpi_sc
->acpi_sysctl_tree
),
182 OID_AUTO
, "acline", CTLTYPE_INT
| CTLFLAG_RD
,
183 &sc
->status
, 0, acpi_acad_sysctl
, "I", "");
186 /* Get initial status after whole system is up. */
190 * Install both system and device notify handlers since the Casio
193 AcpiInstallNotifyHandler(handle
, ACPI_ALL_NOTIFY
,
194 acpi_acad_notify_handler
, dev
);
195 AcpiOsExecute(OSL_NOTIFY_HANDLER
, acpi_acad_init_acline
, dev
);
201 acpi_acad_ioctl(u_long cmd
, caddr_t addr
, void *arg
)
203 struct acpi_acad_softc
*sc
;
207 sc
= device_get_softc(dev
);
210 * No security check required: information retrieval only. If
211 * new functions are added here, a check might be required.
214 case ACPIIO_ACAD_GET_STATUS
:
215 acpi_acad_get_status(dev
);
216 *(int *)addr
= sc
->status
;
226 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS
)
230 if (acpi_acad_get_acline(&val
) != 0)
233 val
= *(u_int
*)oidp
->oid_arg1
;
234 error
= sysctl_handle_int(oidp
, &val
, 0, req
);
239 acpi_acad_init_acline(void *arg
)
241 struct acpi_acad_softc
*sc
;
246 sc
= device_get_softc(dev
);
247 ACPI_VPRINT(dev
, acpi_device_get_parent_softc(dev
),
248 "acline initialization start\n");
250 for (retry
= 0; retry
< ACPI_ACAD_RETRY_MAX
; retry
++) {
251 acpi_acad_get_status(dev
);
252 if (sc
->status
!= -1)
257 ACPI_VPRINT(dev
, acpi_device_get_parent_softc(dev
),
258 "acline initialization done, tried %d times\n", retry
+ 1);
262 * If no AC line devices detected after boot, create an "online" event
263 * so that userland code can adjust power settings accordingly. The default
264 * power profile is "performance" so we don't need to repeat that here.
267 acpi_acad_ac_only(void __unused
*arg
)
270 if (devclass_get_count(acpi_acad_devclass
) == 0)
271 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT
, 1);
278 acpi_acad_get_acline(int *status
)
280 struct acpi_acad_softc
*sc
;
283 dev
= devclass_get_device(acpi_acad_devclass
, 0);
286 sc
= device_get_softc(dev
);
288 acpi_acad_get_status(dev
);
289 *status
= sc
->status
;