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/ioccom.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
39 #include <sys/power.h>
43 #include <dev/acpica5/acpivar.h>
44 #include <dev/acpica5/acpiio.h>
45 #include <bus/isa/isavar.h>
46 #include <bus/isa/pnpvar.h>
48 /* Hooks for the ACPI CA debugging infrastructure */
49 #define _COMPONENT ACPI_AC_ADAPTER
50 ACPI_MODULE_NAME("AC_ADAPTER")
52 /* Number of times to retry initialization before giving up. */
53 #define ACPI_ACAD_RETRY_MAX 6
55 #define ACPI_POWERSOURCE_STAT_CHANGE 0x80
57 struct acpi_acad_softc {
61 static void acpi_acad_get_status(void *);
62 static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
63 static int acpi_acad_probe(device_t);
64 static int acpi_acad_attach(device_t);
65 static int acpi_acad_ioctl(u_long, caddr_t, void *);
66 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
67 static void acpi_acad_init_acline(void *arg);
68 static void acpi_acad_ac_only(void *arg);
70 static device_method_t acpi_acad_methods[] = {
71 /* Device interface */
72 DEVMETHOD(device_probe, acpi_acad_probe),
73 DEVMETHOD(device_attach, acpi_acad_attach),
78 static driver_t acpi_acad_driver = {
81 sizeof(struct acpi_acad_softc),
84 static devclass_t acpi_acad_devclass;
85 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
86 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
88 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
90 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
93 acpi_acad_get_status(void *context)
95 struct acpi_acad_softc *sc;
101 sc = device_get_softc(dev);
102 h = acpi_get_handle(dev);
104 acpi_GetInteger(h, "_PSR", &newstatus);
106 /* If status is valid and has changed, notify the system. */
107 ACPI_SERIAL_BEGIN(acad);
108 if (newstatus != -1 && sc->status != newstatus) {
109 sc->status = newstatus;
110 power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
111 POWER_PROFILE_ECONOMY);
112 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
113 "%s Line\n", newstatus ? "On" : "Off");
114 acpi_UserNotify("ACAD", h, newstatus);
116 ACPI_SERIAL_END(acad);
120 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
124 dev = (device_t)context;
126 case ACPI_NOTIFY_BUS_CHECK:
127 case ACPI_NOTIFY_DEVICE_CHECK:
128 case ACPI_POWERSOURCE_STAT_CHANGE:
129 /* Temporarily. It is better to notify policy manager */
130 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
133 device_printf(dev, "unknown notify %#x\n", notify);
139 acpi_acad_probe(device_t dev)
141 static char *acad_ids[] = { "ACPI0003", NULL };
143 if (acpi_disabled("acad") ||
144 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
147 device_set_desc(dev, "AC Adapter");
152 acpi_acad_attach(device_t dev)
154 struct acpi_acad_softc *sc;
155 struct acpi_softc *acpi_sc;
159 sc = device_get_softc(dev);
160 handle = acpi_get_handle(dev);
162 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
166 ACPI_SERIAL_INIT(acad);
168 if (device_get_unit(dev) == 0) {
169 acpi_sc = acpi_device_get_parent_softc(dev);
170 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
171 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
172 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
173 &sc->status, 0, acpi_acad_sysctl, "I", "");
176 /* Get initial status after whole system is up. */
180 * Install both system and device notify handlers since the Casio
183 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
184 acpi_acad_notify_handler, dev);
185 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev);
191 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
193 struct acpi_acad_softc *sc;
197 sc = device_get_softc(dev);
200 * No security check required: information retrieval only. If
201 * new functions are added here, a check might be required.
204 case ACPIIO_ACAD_GET_STATUS:
205 acpi_acad_get_status(dev);
206 *(int *)addr = sc->status;
216 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
220 if (acpi_acad_get_acline(&val) != 0)
223 val = *(u_int *)oidp->oid_arg1;
224 error = sysctl_handle_int(oidp, &val, 0, req);
229 acpi_acad_init_acline(void *arg)
231 struct acpi_acad_softc *sc;
236 sc = device_get_softc(dev);
237 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
238 "acline initialization start\n");
240 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
241 acpi_acad_get_status(dev);
242 if (sc->status != -1)
247 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
248 "acline initialization done, tried %d times\n", retry + 1);
252 * If no AC line devices detected after boot, create an "online" event
253 * so that userland code can adjust power settings accordingly. The default
254 * power profile is "performance" so we don't need to repeat that here.
257 acpi_acad_ac_only(void __unused *arg)
260 if (devclass_get_count(acpi_acad_devclass) == 0)
261 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
268 acpi_acad_get_acline(int *status)
270 struct acpi_acad_softc *sc;
273 dev = devclass_get_device(acpi_acad_devclass, 0);
276 sc = device_get_softc(dev);
278 acpi_acad_get_status(dev);
279 *status = sc->status;