freebsd-dev/sys/dev/acpica/acpi_battery.c
2003-08-11 15:34:43 +00:00

244 lines
6.5 KiB
C

/*-
* Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "opt_acpi.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/ioccom.h>
#include <sys/sysctl.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data");
struct acpi_batteries {
TAILQ_ENTRY(acpi_batteries) link;
struct acpi_battdesc battdesc;
};
static TAILQ_HEAD(,acpi_batteries) acpi_batteries;
static int acpi_batteries_initted = 0;
static int acpi_batteries_units = 0;
static int acpi_battery_info_expire = 5;
static struct acpi_battinfo acpi_battery_battinfo;
int
acpi_battery_get_units(void)
{
return (acpi_batteries_units);
}
int
acpi_battery_get_battdesc(int logical_unit, struct acpi_battdesc *battdesc)
{
struct acpi_batteries *bp;
int i;
if (logical_unit < 0 || logical_unit >= acpi_batteries_units)
return (ENXIO);
i = 0;
TAILQ_FOREACH(bp, &acpi_batteries, link) {
if (logical_unit == i) {
battdesc->type = bp->battdesc.type;
battdesc->phys_unit = bp->battdesc.phys_unit;
return (0);
}
i++;
}
return (ENXIO);
}
int
acpi_battery_get_battinfo(int unit, struct acpi_battinfo *battinfo)
{
struct acpi_battdesc battdesc;
int error;
error = 0;
if (unit == -1) {
error = acpi_cmbat_get_battinfo(-1, battinfo);
goto out;
} else {
error = acpi_battery_get_battdesc(unit, &battdesc);
if (error != 0)
goto out;
switch (battdesc.type) {
case ACPI_BATT_TYPE_CMBAT:
error = acpi_cmbat_get_battinfo(battdesc.phys_unit, battinfo);
break;
default:
error = ENXIO;
break;
}
}
out:
return (error);
}
int
acpi_battery_get_info_expire(void)
{
return (acpi_battery_info_expire);
}
static int
acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg)
{
union acpi_battery_ioctl_arg *ioctl_arg;
int error, logical_unit;
ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
error = 0;
/*
* No security check required: information retrieval only. If
* new functions are added here, a check might be required.
*/
switch (cmd) {
case ACPIIO_BATT_GET_UNITS:
*(int *)addr = acpi_battery_get_units();
break;
case ACPIIO_BATT_GET_BATTDESC:
logical_unit = ioctl_arg->unit;
error = acpi_battery_get_battdesc(logical_unit, &ioctl_arg->battdesc);
break;
case ACPIIO_BATT_GET_BATTINFO:
logical_unit = ioctl_arg->unit;
error = acpi_battery_get_battinfo(logical_unit, &ioctl_arg->battinfo);
break;
default:
error = EINVAL;
break;
}
return (error);
}
static int
acpi_battery_sysctl(SYSCTL_HANDLER_ARGS)
{
int val, error;
acpi_battery_get_battinfo(-1, &acpi_battery_battinfo);
val = *(u_int *)oidp->oid_arg1;
error = sysctl_handle_int(oidp, &val, 0, req);
return (error);
}
static int
acpi_battery_init(void)
{
struct acpi_softc *sc;
device_t dev;
int error;
dev = devclass_get_device(devclass_find("acpi"), 0);
if (dev == NULL)
return (ENXIO);
sc = device_get_softc(dev);
if (sc == NULL)
return (ENXIO);
error = 0;
TAILQ_INIT(&acpi_batteries);
acpi_batteries_initted = 1;
error = acpi_register_ioctl(ACPIIO_BATT_GET_UNITS, acpi_battery_ioctl,
NULL);
if (error != 0)
return (error);
error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTDESC, acpi_battery_ioctl,
NULL);
if (error != 0)
return (error);
error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTINFO, acpi_battery_ioctl,
NULL);
if (error != 0)
return (error);
sysctl_ctx_init(&sc->acpi_battery_sysctl_ctx);
sc->acpi_battery_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_battery_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "battery", CTLFLAG_RD, 0, "");
SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
OID_AUTO, "life", CTLTYPE_INT | CTLFLAG_RD,
&acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I", "");
SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
OID_AUTO, "time", CTLTYPE_INT | CTLFLAG_RD,
&acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I", "");
SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RD,
&acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I", "");
SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
OID_AUTO, "units", CTLFLAG_RD, &acpi_batteries_units, 0, "");
SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW,
&acpi_battery_info_expire, 0, "");
return (error);
}
int
acpi_battery_register(int type, int phys_unit)
{
struct acpi_batteries *bp;
int error;
error = 0;
bp = malloc(sizeof(*bp), M_ACPIBATT, M_NOWAIT);
if (bp == NULL)
return (ENOMEM);
bp->battdesc.type = type;
bp->battdesc.phys_unit = phys_unit;
if (acpi_batteries_initted == 0) {
if ((error = acpi_battery_init()) != 0) {
free(bp, M_ACPIBATT);
return (error);
}
}
TAILQ_INSERT_TAIL(&acpi_batteries, bp, link);
acpi_batteries_units++;
return (0);
}