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/*-
* Copyright (c) 2005 Nate Lawson
* Copyright (c) 2000 Munehiro Matsuda
* Copyright (c) 2000 Takanori Watanabe
* Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/acpica/acpi_cmbat.c 216503 2010-12-17 16:21:30Z avg $");
#include "opt_acpi.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/ioccom.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
MALLOC_DEFINE(M_ACPICMBAT, "acpicmbat", "ACPI control method battery data");
/* Number of times to retry initialization before giving up. */
#define ACPI_CMBAT_RETRY_MAX 6
/* Check the battery once a minute. */
#define CMBAT_POLLRATE (60 * hz)
/* Hooks for the ACPI CA debugging infrastructure */
#define _COMPONENT ACPI_BATTERY
ACPI_MODULE_NAME("BATTERY")
#define ACPI_BATTERY_BST_CHANGE 0x80
#define ACPI_BATTERY_BIF_CHANGE 0x81
struct acpi_cmbat_softc {
device_t dev;
int flags;
struct acpi_bif bif;
struct acpi_bst bst;
struct timespec bst_lastupdated;
};
ACPI_SERIAL_DECL(cmbat, "ACPI cmbat");
static int acpi_cmbat_probe(device_t dev);
static int acpi_cmbat_attach(device_t dev);
static int acpi_cmbat_detach(device_t dev);
static int acpi_cmbat_resume(device_t dev);
static void acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify,
void *context);
static int acpi_cmbat_info_expired(struct timespec *lastupdated);
static void acpi_cmbat_info_updated(struct timespec *lastupdated);
static void acpi_cmbat_get_bst(void *arg);
static void acpi_cmbat_get_bif_task(void *arg);
static void acpi_cmbat_get_bif(void *arg);
static int acpi_cmbat_bst(device_t dev, struct acpi_bst *bstp);
static int acpi_cmbat_bif(device_t dev, struct acpi_bif *bifp);
static void acpi_cmbat_init_battery(void *arg);
static device_method_t acpi_cmbat_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, acpi_cmbat_probe),
DEVMETHOD(device_attach, acpi_cmbat_attach),
DEVMETHOD(device_detach, acpi_cmbat_detach),
DEVMETHOD(device_resume, acpi_cmbat_resume),
/* ACPI battery interface */
DEVMETHOD(acpi_batt_get_info, acpi_cmbat_bif),
DEVMETHOD(acpi_batt_get_status, acpi_cmbat_bst),
{0, 0}
};
static driver_t acpi_cmbat_driver = {
"battery",
acpi_cmbat_methods,
sizeof(struct acpi_cmbat_softc),
};
static devclass_t acpi_cmbat_devclass;
DRIVER_MODULE(acpi_cmbat, acpi, acpi_cmbat_driver, acpi_cmbat_devclass, 0, 0);
MODULE_DEPEND(acpi_cmbat, acpi, 1, 1, 1);
static int
acpi_cmbat_probe(device_t dev)
{
static char *cmbat_ids[] = { "PNP0C0A", NULL };
if (acpi_disabled("cmbat") ||
ACPI_ID_PROBE(device_get_parent(dev), dev, cmbat_ids) == NULL)
return (ENXIO);
device_set_desc(dev, "ACPI Control Method Battery");
return (0);
}
static int
acpi_cmbat_attach(device_t dev)
{
int error;
ACPI_HANDLE handle;
struct acpi_cmbat_softc *sc;
sc = device_get_softc(dev);
handle = acpi_get_handle(dev);
sc->dev = dev;
timespecclear(&sc->bst_lastupdated);
error = acpi_battery_register(dev);
if (error != 0) {
device_printf(dev, "registering battery failed\n");
return (error);
}
/*
* Install a system notify handler in addition to the device notify.
* Toshiba notebook uses this alternate notify for its battery.
*/
AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
acpi_cmbat_notify_handler, dev);
AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_init_battery, dev);
return (0);
}
static int
acpi_cmbat_detach(device_t dev)
{
ACPI_HANDLE handle;
handle = acpi_get_handle(dev);
AcpiRemoveNotifyHandler(handle, ACPI_ALL_NOTIFY, acpi_cmbat_notify_handler);
acpi_battery_remove(dev);
return (0);
}
static int
acpi_cmbat_resume(device_t dev)
{
AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_init_battery, dev);
return (0);
}
static void
acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
{
struct acpi_cmbat_softc *sc;
device_t dev;
dev = (device_t)context;
sc = device_get_softc(dev);
switch (notify) {
case ACPI_NOTIFY_DEVICE_CHECK:
case ACPI_BATTERY_BST_CHANGE:
/*
* Clear the last updated time. The next call to retrieve the
* battery status will get the new value for us.
*/
timespecclear(&sc->bst_lastupdated);
break;
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_BATTERY_BIF_CHANGE:
/*
* Queue a callback to get the current battery info from thread
* context. It's not safe to block in a notify handler.
*/
AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cmbat_get_bif_task, dev);
break;
}
acpi_UserNotify("CMBAT", h, notify);
}
static int
acpi_cmbat_info_expired(struct timespec *lastupdated)
{
struct timespec curtime;
ACPI_SERIAL_ASSERT(cmbat);
if (lastupdated == NULL)
return (TRUE);
if (!timespecisset(lastupdated))
return (TRUE);
getnanotime(&curtime);
timespecsub(&curtime, lastupdated);
return (curtime.tv_sec < 0 ||
curtime.tv_sec > acpi_battery_get_info_expire());
}
static void
acpi_cmbat_info_updated(struct timespec *lastupdated)
{
ACPI_SERIAL_ASSERT(cmbat);
if (lastupdated != NULL)
getnanotime(lastupdated);
}
static void
acpi_cmbat_get_bst(void *arg)
{
struct acpi_cmbat_softc *sc;
ACPI_STATUS as;
ACPI_OBJECT *res;
ACPI_HANDLE h;
ACPI_BUFFER bst_buffer;
device_t dev;
ACPI_SERIAL_ASSERT(cmbat);
dev = arg;
sc = device_get_softc(dev);
h = acpi_get_handle(dev);
bst_buffer.Pointer = NULL;
bst_buffer.Length = ACPI_ALLOCATE_BUFFER;
if (!acpi_cmbat_info_expired(&sc->bst_lastupdated))
goto end;
as = AcpiEvaluateObject(h, "_BST", NULL, &bst_buffer);
if (ACPI_FAILURE(as)) {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"error fetching current battery status -- %s\n",
AcpiFormatException(as));
goto end;
}
res = (ACPI_OBJECT *)bst_buffer.Pointer;
if (!ACPI_PKG_VALID(res, 4)) {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"battery status corrupted\n");
goto end;
}
if (acpi_PkgInt32(res, 0, &sc->bst.state) != 0)
goto end;
if (acpi_PkgInt32(res, 1, &sc->bst.rate) != 0)
goto end;
if (acpi_PkgInt32(res, 2, &sc->bst.cap) != 0)
goto end;
if (acpi_PkgInt32(res, 3, &sc->bst.volt) != 0)
goto end;
acpi_cmbat_info_updated(&sc->bst_lastupdated);
/* Clear out undefined/extended bits that might be set by hardware. */
sc->bst.state &= ACPI_BATT_STAT_BST_MASK;
if ((sc->bst.state & ACPI_BATT_STAT_INVALID) == ACPI_BATT_STAT_INVALID)
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"battery reports simultaneous charging and discharging\n");
/* XXX If all batteries are critical, perhaps we should suspend. */
if (sc->bst.state & ACPI_BATT_STAT_CRITICAL) {
if ((sc->flags & ACPI_BATT_STAT_CRITICAL) == 0) {
sc->flags |= ACPI_BATT_STAT_CRITICAL;
device_printf(dev, "critically low charge!\n");
}
} else
sc->flags &= ~ACPI_BATT_STAT_CRITICAL;
end:
if (bst_buffer.Pointer != NULL)
AcpiOsFree(bst_buffer.Pointer);
}
/* XXX There should be a cleaner way to do this locking. */
static void
acpi_cmbat_get_bif_task(void *arg)
{
ACPI_SERIAL_BEGIN(cmbat);
acpi_cmbat_get_bif(arg);
ACPI_SERIAL_END(cmbat);
}
static void
acpi_cmbat_get_bif(void *arg)
{
struct acpi_cmbat_softc *sc;
ACPI_STATUS as;
ACPI_OBJECT *res;
ACPI_HANDLE h;
ACPI_BUFFER bif_buffer;
device_t dev;
ACPI_SERIAL_ASSERT(cmbat);
dev = arg;
sc = device_get_softc(dev);
h = acpi_get_handle(dev);
bif_buffer.Pointer = NULL;
bif_buffer.Length = ACPI_ALLOCATE_BUFFER;
as = AcpiEvaluateObject(h, "_BIF", NULL, &bif_buffer);
if (ACPI_FAILURE(as)) {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"error fetching current battery info -- %s\n",
AcpiFormatException(as));
goto end;
}
res = (ACPI_OBJECT *)bif_buffer.Pointer;
if (!ACPI_PKG_VALID(res, 13)) {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"battery info corrupted\n");
goto end;
}
if (acpi_PkgInt32(res, 0, &sc->bif.units) != 0)
goto end;
if (acpi_PkgInt32(res, 1, &sc->bif.dcap) != 0)
goto end;
if (acpi_PkgInt32(res, 2, &sc->bif.lfcap) != 0)
goto end;
if (acpi_PkgInt32(res, 3, &sc->bif.btech) != 0)
goto end;
if (acpi_PkgInt32(res, 4, &sc->bif.dvol) != 0)
goto end;
if (acpi_PkgInt32(res, 5, &sc->bif.wcap) != 0)
goto end;
if (acpi_PkgInt32(res, 6, &sc->bif.lcap) != 0)
goto end;
if (acpi_PkgInt32(res, 7, &sc->bif.gra1) != 0)
goto end;
if (acpi_PkgInt32(res, 8, &sc->bif.gra2) != 0)
goto end;
if (acpi_PkgStr(res, 9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN) != 0)
goto end;
if (acpi_PkgStr(res, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN) != 0)
goto end;
if (acpi_PkgStr(res, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN) != 0)
goto end;
if (acpi_PkgStr(res, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN) != 0)
goto end;
end:
if (bif_buffer.Pointer != NULL)
AcpiOsFree(bif_buffer.Pointer);
}
static int
acpi_cmbat_bif(device_t dev, struct acpi_bif *bifp)
{
struct acpi_cmbat_softc *sc;
sc = device_get_softc(dev);
/*
* Just copy the data. The only value that should change is the
* last-full capacity, so we only update when we get a notify that says
* the info has changed. Many systems apparently take a long time to
* process a _BIF call so we avoid it if possible.
*/
ACPI_SERIAL_BEGIN(cmbat);
bifp->units = sc->bif.units;
bifp->dcap = sc->bif.dcap;
bifp->lfcap = sc->bif.lfcap;
bifp->btech = sc->bif.btech;
bifp->dvol = sc->bif.dvol;
bifp->wcap = sc->bif.wcap;
bifp->lcap = sc->bif.lcap;
bifp->gra1 = sc->bif.gra1;
bifp->gra2 = sc->bif.gra2;
strncpy(bifp->model, sc->bif.model, sizeof(sc->bif.model));
strncpy(bifp->serial, sc->bif.serial, sizeof(sc->bif.serial));
strncpy(bifp->type, sc->bif.type, sizeof(sc->bif.type));
strncpy(bifp->oeminfo, sc->bif.oeminfo, sizeof(sc->bif.oeminfo));
ACPI_SERIAL_END(cmbat);
return (0);
}
static int
acpi_cmbat_bst(device_t dev, struct acpi_bst *bstp)
{
struct acpi_cmbat_softc *sc;
sc = device_get_softc(dev);
ACPI_SERIAL_BEGIN(cmbat);
if (acpi_BatteryIsPresent(dev)) {
acpi_cmbat_get_bst(dev);
bstp->state = sc->bst.state;
bstp->rate = sc->bst.rate;
bstp->cap = sc->bst.cap;
bstp->volt = sc->bst.volt;
} else
bstp->state = ACPI_BATT_STAT_NOT_PRESENT;
ACPI_SERIAL_END(cmbat);
return (0);
}
static void
acpi_cmbat_init_battery(void *arg)
{
struct acpi_cmbat_softc *sc;
int retry, valid;
device_t dev;
dev = (device_t)arg;
sc = device_get_softc(dev);
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"battery initialization start\n");
/*
* Try repeatedly to get valid data from the battery. Since the
* embedded controller isn't always ready just after boot, we may have
* to wait a while.
*/
for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10000)) {
/* batteries on DOCK can be ejected w/ DOCK during retrying */
if (!device_is_attached(dev))
return;
if (!acpi_BatteryIsPresent(dev))
continue;
/*
* Only query the battery if this is the first try or the specific
* type of info is still invalid.
*/
ACPI_SERIAL_BEGIN(cmbat);
if (retry == 0 || !acpi_battery_bst_valid(&sc->bst)) {
timespecclear(&sc->bst_lastupdated);
acpi_cmbat_get_bst(dev);
}
if (retry == 0 || !acpi_battery_bif_valid(&sc->bif))
acpi_cmbat_get_bif(dev);
valid = acpi_battery_bst_valid(&sc->bst) &&
acpi_battery_bif_valid(&sc->bif);
ACPI_SERIAL_END(cmbat);
if (valid)
break;
}
if (retry == ACPI_CMBAT_RETRY_MAX) {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"battery initialization failed, giving up\n");
} else {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"battery initialization done, tried %d times\n", retry + 1);
}
}