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),
90 static devclass_t acpi_acad_devclass;
91 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, NULL, NULL);
92 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
94 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
96 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
99 acpi_acad_get_status(void *context)
101 struct acpi_acad_softc *sc;
107 sc = device_get_softc(dev);
108 h = acpi_get_handle(dev);
110 acpi_GetInteger(h, "_PSR", &newstatus);
112 /* If status is valid and has changed, notify the system. */
113 ACPI_SERIAL_BEGIN(acad);
114 if (newstatus != -1 && sc->status != newstatus) {
115 sc->status = newstatus;
116 power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
117 POWER_PROFILE_ECONOMY);
118 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
119 "%s Line\n", newstatus ? "On" : "Off");
120 acpi_UserNotify("ACAD", h, newstatus);
122 ACPI_SERIAL_END(acad);
126 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
130 dev = (device_t)context;
132 case ACPI_NOTIFY_BUS_CHECK:
133 case ACPI_NOTIFY_DEVICE_CHECK:
134 case ACPI_POWERSOURCE_STAT_CHANGE:
135 case ACPI_NOTIFY_CX_STATES:
136 /* Temporarily. It is better to notify policy manager */
137 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
141 device_printf(dev, "unknown notify %#x\n", notify);
147 acpi_acad_probe(device_t dev)
149 static char *acad_ids[] = { "ACPI0003", NULL };
151 if (acpi_disabled("acad") ||
152 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
155 device_set_desc(dev, "AC Adapter");
160 acpi_acad_attach(device_t dev)
162 struct acpi_acad_softc *sc;
163 struct acpi_softc *acpi_sc;
167 sc = device_get_softc(dev);
168 handle = acpi_get_handle(dev);
170 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
174 ACPI_SERIAL_INIT(acad);
176 if (device_get_unit(dev) == 0) {
177 acpi_sc = acpi_device_get_parent_softc(dev);
178 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
179 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
180 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
181 &sc->status, 0, acpi_acad_sysctl, "I", "");
184 /* Get initial status after whole system is up. */
188 * Install both system and device notify handlers since the Casio
191 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
192 acpi_acad_notify_handler, dev);
193 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev);
199 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
201 struct acpi_acad_softc *sc;
205 sc = device_get_softc(dev);
208 * No security check required: information retrieval only. If
209 * new functions are added here, a check might be required.
212 case ACPIIO_ACAD_GET_STATUS:
213 acpi_acad_get_status(dev);
214 *(int *)addr = sc->status;
224 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
228 if (acpi_acad_get_acline(&val) != 0)
231 val = *(u_int *)oidp->oid_arg1;
232 error = sysctl_handle_int(oidp, &val, 0, req);
237 acpi_acad_init_acline(void *arg)
239 struct acpi_acad_softc *sc;
244 sc = device_get_softc(dev);
245 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
246 "acline initialization start\n");
248 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
249 acpi_acad_get_status(dev);
250 if (sc->status != -1)
255 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
256 "acline initialization done, tried %d times\n", retry + 1);
260 * If no AC line devices detected after boot, create an "online" event
261 * so that userland code can adjust power settings accordingly. The default
262 * power profile is "performance" so we don't need to repeat that here.
265 acpi_acad_ac_only(void __unused *arg)
268 if (devclass_get_count(acpi_acad_devclass) == 0)
269 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
276 acpi_acad_get_acline(int *status)
278 struct acpi_acad_softc *sc;
281 dev = devclass_get_device(acpi_acad_devclass, 0);
284 sc = device_get_softc(dev);
286 acpi_acad_get_status(dev);
287 *status = sc->status;