freebsd-dev/sys/dev/acpica/acpi_cmbat.c
Mitsuru IWASAKI c573e654b7 Add OS layer ACPI mutex and threading support.
- Temporary fix a bug of Intel ACPI CA core code.
 - Add OS layer ACPI mutex support.  This can be disabled by
   specifying option ACPI_NO_SEMAPHORES.
 - Add ACPI threading support.  Now that we have a dedicate taskqueue for
   ACPI tasks and more ACPI task threads can be created by specifying option
   ACPI_MAX_THREADS.
 - Change acpi_EvaluateIntoBuffer() behavior slightly to reuse given
   caller's buffer unless AE_BUFFER_OVERFLOW occurs.  Also CM battery's
   evaluations were changed to use acpi_EvaluateIntoBuffer().
 - Add new utility function acpi_ConvertBufferToInteger().
 - Add simple locking for CM battery and temperature updating.
 - Fix a minor problem on EC locking.
 - Make the thermal zone polling rate to be changeable.
 - Change minor things on AcpiOsSignal(); in ACPI_SIGNAL_FATAL case,
   entering Debugger is easier to investigate the problem rather than panic.
2001-12-22 16:05:41 +00:00

647 lines
16 KiB
C

/*-
* 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.
*
* $FreeBSD$
*/
#include "opt_acpi.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/ioccom.h>
#include <sys/conf.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
MALLOC_DEFINE(M_ACPICMBAT, "acpicmbat", "ACPI control method battery data");
#define CMBAT_POLLRATE (60 * hz)
/*
* Hooks for the ACPI CA debugging infrastructure
*/
#define _COMPONENT ACPI_BATTERY
MODULE_NAME("BATTERY")
#define ACPI_BATTERY_BST_CHANGE 0x80
#define ACPI_BATTERY_BIF_CHANGE 0x81
#define PKG_GETINT(res, tmp, idx, dest, label) do { \
tmp = &res->Package.Elements[idx]; \
if (tmp == NULL) { \
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), \
__func__ ": PKG_GETINT error, idx = %d\n.", idx); \
goto label; \
} \
if (tmp->Type != ACPI_TYPE_INTEGER) \
goto label; \
dest = tmp->Integer.Value; \
} while (0)
#define PKG_GETSTR(res, tmp, idx, dest, size, label) do { \
size_t length; \
length = size; \
tmp = &res->Package.Elements[idx]; \
if (tmp == NULL) { \
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), \
__func__ ": PKG_GETSTR error, idx = %d\n.", idx); \
goto label; \
} \
bzero(dest, sizeof(dest)); \
switch (tmp->Type) { \
case ACPI_TYPE_STRING: \
if (tmp->String.Length < length) { \
length = tmp->String.Length; \
} \
strncpy(dest, tmp->String.Pointer, length); \
break; \
case ACPI_TYPE_BUFFER: \
if (tmp->Buffer.Length < length) { \
length = tmp->Buffer.Length; \
} \
strncpy(dest, tmp->Buffer.Pointer, length); \
break; \
default: \
goto label; \
} \
dest[sizeof(dest)-1] = '\0'; \
} while (0)
struct acpi_cmbat_softc {
device_t dev;
struct acpi_bif bif;
struct acpi_bst bst;
ACPI_BUFFER bif_buffer;
ACPI_BUFFER bst_buffer;
struct timespec bif_lastupdated;
struct timespec bst_lastupdated;
int bif_updating;
int bst_updating;
int not_present;
int cap;
int min;
int full_charge_time;
struct callout_handle cmbat_timeout;
};
static struct timespec acpi_cmbat_info_lastupdated;
/* XXX: devclass_get_maxunit() don't give us the current allocated units... */
static int acpi_cmbat_units = 0;
static void acpi_cmbat_timeout(void *);
static int acpi_cmbat_info_expired(struct timespec *);
static void acpi_cmbat_info_updated(struct timespec *);
static void acpi_cmbat_get_bst(void *);
static void acpi_cmbat_get_bif(void *);
static void acpi_cmbat_notify_handler(ACPI_HANDLE, UINT32, void *);
static int acpi_cmbat_probe(device_t);
static int acpi_cmbat_attach(device_t);
static int acpi_cmbat_resume(device_t);
static int acpi_cmbat_ioctl(u_long, caddr_t, void *);
static int acpi_cmbat_get_total_battinfo(struct acpi_battinfo *);
/*
* Poll the battery info.
*/
static void
acpi_cmbat_timeout(void *context)
{
device_t dev;
struct acpi_cmbat_softc *sc;
dev = (device_t)context;
sc = device_get_softc(dev);
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_get_bif, dev);
sc->cmbat_timeout = timeout(acpi_cmbat_timeout, dev, CMBAT_POLLRATE);
}
static __inline int
acpi_cmbat_info_expired(struct timespec *lastupdated)
{
struct timespec curtime;
if (lastupdated == NULL) {
return (1);
}
if (!timespecisset(lastupdated)) {
return (1);
}
getnanotime(&curtime);
timespecsub(&curtime, lastupdated);
return ((curtime.tv_sec < 0 || curtime.tv_sec > acpi_battery_get_info_expire()));
}
static __inline void
acpi_cmbat_info_updated(struct timespec *lastupdated)
{
if (lastupdated != NULL) {
getnanotime(lastupdated);
}
}
static void
acpi_cmbat_get_bst(void *context)
{
device_t dev;
struct acpi_cmbat_softc *sc;
ACPI_STATUS as;
ACPI_OBJECT *res, *tmp;
ACPI_HANDLE h;
dev = context;
sc = device_get_softc(dev);
h = acpi_get_handle(dev);
if (!acpi_cmbat_info_expired(&sc->bst_lastupdated)) {
return;
}
if (sc->bst_updating) {
return;
}
sc->bst_updating = 1;
untimeout(acpi_cmbat_timeout, (caddr_t)dev, sc->cmbat_timeout);
if ((as = acpi_EvaluateIntoBuffer(h, "_BST", NULL, &sc->bst_buffer)) != AE_OK) {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"error fetching current battery status -- %s\n",
AcpiFormatException(as));
goto end;
}
res = (ACPI_OBJECT *)sc->bst_buffer.Pointer;
if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count != 4)) {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"battery status corrupted\n");
goto end;
}
PKG_GETINT(res, tmp, 0, sc->bst.state, end);
PKG_GETINT(res, tmp, 1, sc->bst.rate, end);
PKG_GETINT(res, tmp, 2, sc->bst.cap, end);
PKG_GETINT(res, tmp, 3, sc->bst.volt, end);
acpi_cmbat_info_updated(&sc->bst_lastupdated);
end:
sc->bst_updating = 0;
sc->cmbat_timeout = timeout(acpi_cmbat_timeout, dev, CMBAT_POLLRATE);
}
static void
acpi_cmbat_get_bif(void *context)
{
device_t dev;
struct acpi_cmbat_softc *sc;
ACPI_STATUS as;
ACPI_OBJECT *res, *tmp;
ACPI_HANDLE h;
dev = context;
sc = device_get_softc(dev);
h = acpi_get_handle(dev);
if (!acpi_cmbat_info_expired(&sc->bif_lastupdated)) {
return;
}
if (sc->bif_updating) {
return;
}
sc->bif_updating = 1;
untimeout(acpi_cmbat_timeout, (caddr_t)dev, sc->cmbat_timeout);
if ((as = acpi_EvaluateIntoBuffer(h, "_BIF", NULL, &sc->bif_buffer)) != AE_OK) {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"error fetching current battery info -- %s\n",
AcpiFormatException(as));
goto end;
}
res = (ACPI_OBJECT *)sc->bif_buffer.Pointer;
if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count != 13)) {
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"battery info corrupted\n");
goto end;
}
PKG_GETINT(res, tmp, 0, sc->bif.unit, end);
PKG_GETINT(res, tmp, 1, sc->bif.dcap, end);
PKG_GETINT(res, tmp, 2, sc->bif.lfcap, end);
PKG_GETINT(res, tmp, 3, sc->bif.btech, end);
PKG_GETINT(res, tmp, 4, sc->bif.dvol, end);
PKG_GETINT(res, tmp, 5, sc->bif.wcap, end);
PKG_GETINT(res, tmp, 6, sc->bif.lcap, end);
PKG_GETINT(res, tmp, 7, sc->bif.gra1, end);
PKG_GETINT(res, tmp, 8, sc->bif.gra2, end);
PKG_GETSTR(res, tmp, 9, sc->bif.model, ACPI_CMBAT_MAXSTRLEN, end);
PKG_GETSTR(res, tmp, 10, sc->bif.serial, ACPI_CMBAT_MAXSTRLEN, end);
PKG_GETSTR(res, tmp, 11, sc->bif.type, ACPI_CMBAT_MAXSTRLEN, end);
PKG_GETSTR(res, tmp, 12, sc->bif.oeminfo, ACPI_CMBAT_MAXSTRLEN, end);
acpi_cmbat_info_updated(&sc->bif_lastupdated);
end:
sc->bif_updating = 0;
sc->cmbat_timeout = timeout(acpi_cmbat_timeout, dev, CMBAT_POLLRATE);
}
static void
acpi_cmbat_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
{
device_t dev;
struct acpi_cmbat_softc *sc;
dev = (device_t)context;
if ((sc = device_get_softc(dev)) == NULL) {
return;
}
switch (notify) {
case ACPI_BATTERY_BST_CHANGE:
timespecclear(&sc->bst_lastupdated);
break;
case ACPI_BATTERY_BIF_CHANGE:
timespecclear(&sc->bif_lastupdated);
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_get_bif, dev);
break;
default:
break;
}
}
static int
acpi_cmbat_probe(device_t dev)
{
if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) &&
!acpi_disabled("cmbat") &&
acpi_MatchHid(dev, "PNP0C0A")) {
/*
* Set device description.
*/
device_set_desc(dev, "Control method Battery");
return (0);
}
return (ENXIO);
}
static int
acpi_cmbat_attach(device_t dev)
{
int error;
ACPI_HANDLE handle;
struct acpi_cmbat_softc *sc;
if ((sc = device_get_softc(dev)) == NULL) {
return (ENXIO);
}
handle = acpi_get_handle(dev);
AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
acpi_cmbat_notify_handler, dev);
bzero(&sc->bif_buffer, sizeof(sc->bif_buffer));
bzero(&sc->bst_buffer, sizeof(sc->bst_buffer));
sc->bif_updating = sc->bst_updating = 0;
sc->dev = dev;
timespecclear(&sc->bif_lastupdated);
timespecclear(&sc->bst_lastupdated);
if (acpi_cmbat_units == 0) {
if ((error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BIF,
acpi_cmbat_ioctl, NULL)) != 0) {
return (error);
}
if ((error = acpi_register_ioctl(ACPIIO_CMBAT_GET_BST,
acpi_cmbat_ioctl, NULL)) != 0) {
return (error);
}
}
if ((error = acpi_battery_register(ACPI_BATT_TYPE_CMBAT,
acpi_cmbat_units)) != 0) {
return (error);
}
acpi_cmbat_units++;
timespecclear(&acpi_cmbat_info_lastupdated);
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_get_bif, dev);
return (0);
}
static int
acpi_cmbat_resume(device_t dev)
{
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_cmbat_get_bif, dev);
return (0);
}
static device_method_t acpi_cmbat_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, acpi_cmbat_probe),
DEVMETHOD(device_attach, acpi_cmbat_attach),
DEVMETHOD(device_resume, acpi_cmbat_resume),
{0, 0}
};
static driver_t acpi_cmbat_driver = {
"acpi_cmbat",
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);
static int
acpi_cmbat_ioctl(u_long cmd, caddr_t addr, void *arg)
{
device_t dev;
union acpi_battery_ioctl_arg *ioctl_arg;
struct acpi_cmbat_softc *sc;
struct acpi_bif *bifp;
struct acpi_bst *bstp;
ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
if ((dev = devclass_get_device(acpi_cmbat_devclass,
ioctl_arg->unit)) == NULL) {
return (ENXIO);
}
if ((sc = device_get_softc(dev)) == NULL) {
return (ENXIO);
}
switch (cmd) {
case ACPIIO_CMBAT_GET_BIF:
acpi_cmbat_get_bif(dev);
bifp = &ioctl_arg->bif;
bifp->unit = sc->bif.unit;
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));
break;
case ACPIIO_CMBAT_GET_BST:
acpi_cmbat_get_bst(dev);
bstp = &ioctl_arg->bst;
bstp->state = sc->bst.state;
bstp->rate = sc->bst.rate;
bstp->cap = sc->bst.cap;
bstp->volt = sc->bst.volt;
break;
}
return (0);
}
static int
acpi_cmbat_get_total_battinfo(struct acpi_battinfo *battinfo)
{
int i;
int error;
int batt_stat;
int valid_rate, valid_units;
int cap, min;
int total_cap, total_min, total_full;
device_t dev;
struct acpi_cmbat_softc *sc;
static int bat_units = 0;
static struct acpi_cmbat_softc **bat = NULL;
cap = min = -1;
batt_stat = ACPI_BATT_STAT_NOT_PRESENT;
error = 0;
/* Allocate array of softc pointers */
if (bat_units != acpi_cmbat_units) {
if (bat != NULL) {
free(bat, M_ACPICMBAT);
bat = NULL;
}
bat_units = 0;
}
if (bat == NULL) {
bat_units = acpi_cmbat_units;
bat = malloc(sizeof(struct acpi_cmbat_softc *) * bat_units,
M_ACPICMBAT, M_NOWAIT);
if (bat == NULL) {
error = ENOMEM;
goto out;
}
/* Collect softc pointers */
for (i = 0; i < acpi_cmbat_units; i++) {
if ((dev = devclass_get_device(acpi_cmbat_devclass, i)) == NULL) {
error = ENXIO;
goto out;
}
if ((sc = device_get_softc(dev)) == NULL) {
error = ENXIO;
goto out;
}
bat[i] = sc;
}
}
/* Get battery status, valid rate and valid units */
batt_stat = valid_rate = valid_units = 0;
for (i = 0; i < acpi_cmbat_units; i++) {
bat[i]->not_present = 0;
acpi_cmbat_get_bst(bat[i]->dev);
/* If battey not installed, we get strange values */
if (bat[i]->bst.state >= ACPI_BATT_STAT_MAX ||
bat[i]->bst.cap == 0xffffffff ||
bat[i]->bst.volt == 0xffffffff ||
bat[i]->bif.lfcap == 0) {
bat[i]->not_present = 1;
continue;
}
valid_units++;
bat[i]->cap = 100 * bat[i]->bst.cap / bat[i]->bif.lfcap;
batt_stat |= bat[i]->bst.state;
if (bat[i]->bst.rate > 0) {
/*
* XXX Hack to calculate total battery time.
* Systems with 2 or more battries, they may get used
* one by one, thus bst.rate is set only to the one
* in use. For remaining batteries bst.rate = 0, which
* makes it impossible to calculate remaining time.
* Some other systems may need sum of bst.rate in
* dis-charging state.
* There for we sum up the bst.rate that is valid
* (in dis-charging state), and use the sum to
* calcutate remaining batteries' time.
*/
if (bat[i]->bst.state & ACPI_BATT_STAT_DISCHARG) {
valid_rate += bat[i]->bst.rate;
}
}
}
/* Calculate total battery capacity and time */
total_cap = total_min = total_full = 0;
for (i = 0; i < acpi_cmbat_units; i++) {
if (bat[i]->not_present) {
continue;
}
if (valid_rate > 0) {
/* Use the sum of bst.rate */
bat[i]->min = 60 * bat[i]->bst.cap / valid_rate;
} else if (bat[i]->full_charge_time > 0) {
bat[i]->min = (bat[i]->full_charge_time * bat[i]->cap) / 100;
} else {
/* Couldn't find valid rate and full battery time */
bat[i]->min = 0;
}
total_min += bat[i]->min;
total_cap += bat[i]->cap;
total_full += bat[i]->full_charge_time;
}
/* Battery life */
if (valid_units == 0) {
cap = -1;
batt_stat = ACPI_BATT_STAT_NOT_PRESENT;
} else {
cap = total_cap / valid_units;
}
/* Battery time */
if (valid_units == 0) {
min = -1;
} else if (valid_rate == 0 || (batt_stat & ACPI_BATT_STAT_CHARGING)) {
if (total_full == 0) {
min = -1;
} else {
min = (total_full * cap) / 100;
}
} else {
min = total_min;
}
acpi_cmbat_info_updated(&acpi_cmbat_info_lastupdated);
out:
battinfo->cap = cap;
battinfo->min = min;
battinfo->state = batt_stat;
return (error);
}
/*
* Public interfaces.
*/
int
acpi_cmbat_get_battinfo(int unit, struct acpi_battinfo *battinfo)
{
int error;
device_t dev;
struct acpi_cmbat_softc *sc;
if (unit == -1) {
return (acpi_cmbat_get_total_battinfo(battinfo));
}
if (acpi_cmbat_info_expired(&acpi_cmbat_info_lastupdated)) {
error = acpi_cmbat_get_total_battinfo(battinfo);
if (error) {
goto out;
}
}
error = 0;
if (unit >= acpi_cmbat_units) {
error = ENXIO;
goto out;
}
if ((dev = devclass_get_device(acpi_cmbat_devclass, unit)) == NULL) {
error = ENXIO;
goto out;
}
if ((sc = device_get_softc(dev)) == NULL) {
error = ENXIO;
goto out;
}
if (sc->not_present) {
battinfo->cap = -1;
battinfo->min = -1;
battinfo->state = ACPI_BATT_STAT_NOT_PRESENT;
} else {
battinfo->cap = sc->cap;
battinfo->min = sc->min;
battinfo->state = sc->bst.state;
}
out:
return (error);
}