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);
}
/*
* No security check required: information retrieval only. If
* new functions are added here, a check might be required.
*/
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:
bstp = &ioctl_arg->bst;
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;
break;
}
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);
}
}
static void
acpi_cmbat_init_battery(void *arg)
{
int retry;
device_t dev = (device_t)arg;
struct acpi_cmbat_softc *sc = device_get_softc(dev);
#define ACPI_CMBAT_RETRY_MAX 6
if (sc->initializing) {
return;
}
sc->initializing = 1;
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"battery initialization start\n");
for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10, 0)) {
sc->present = acpi_BatteryIsPresent(dev);
if (!sc->present) {
continue;
}
timespecclear(&sc->bst_lastupdated);
timespecclear(&sc->bif_lastupdated);
acpi_cmbat_get_bst(dev);
if (!acpi_cmbat_is_bst_valid(&sc->bst)) {
continue;
}
acpi_cmbat_get_bif(dev);
if (!acpi_cmbat_is_bif_valid(&sc->bif)) {
continue;
}
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);
sc->initializing = 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 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]->present = acpi_BatteryIsPresent(bat[i]->dev);
if (!bat[i]->present)
continue;
acpi_cmbat_get_bst(bat[i]->dev);
/* If battey not installed, we get strange values */
if (!acpi_cmbat_is_bst_valid(&(bat[i]->bst)) ||
!acpi_cmbat_is_bif_valid(&(bat[i]->bif))) {
bat[i]->present = 0;
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]->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);
}
/* Get info about one or all batteries. */
int
acpi_battery_get_battinfo(device_t dev, struct acpi_battinfo *battinfo)
{
int batt_stat, devcount, dev_idx, error, i;
int total_cap, total_min, valid_rate, valid_units;
devclass_t batt_dc;
device_t batt_dev;
struct acpi_bst *bst;
struct acpi_bif *bif;
struct acpi_battinfo *bi;
/*
* Get the battery devclass and max unit for battery devices. If there
* are none or error, return immediately.
*/
batt_dc = devclass_find("battery");
if (batt_dc == NULL)
return (ENXIO);
devcount = devclass_get_maxunit(batt_dc);
if (devcount == 0)
return (ENXIO);
/*
* Allocate storage for all _BST data, their derived battinfo data,
* and the current battery's _BIF data.
*/
bst = kmalloc(devcount * sizeof(*bst), M_TEMP, M_WAITOK | M_ZERO);
bi = kmalloc(devcount * sizeof(*bi), M_TEMP, M_WAITOK | M_ZERO);
bif = kmalloc(sizeof(*bif), M_TEMP, M_WAITOK | M_ZERO);
/*
* Pass 1: for each battery that is present and valid, get its status,
* calculate percent capacity remaining, and sum all the current
* discharge rates.
*/
dev_idx = -1;
batt_stat = valid_rate = valid_units = 0;
for (i = 0; i < devcount; i++) {
/* Default info for every battery is "not present". */
acpi_reset_battinfo(&bi[i]);
/*
* Find the device. Since devcount is in terms of max units, this
* may be a sparse array so skip devices that aren't present.
*/
batt_dev = devclass_get_device(batt_dc, i);
if (batt_dev == NULL)
continue;
/* If examining a specific battery and this is it, record its index. */
if (dev != NULL && dev == batt_dev)
dev_idx = i;
/*
* Be sure we can get various info from the battery. Note that
* acpi_BatteryIsPresent() is not enough because smart batteries only
* return that the device is present.
*/
if (!acpi_BatteryIsPresent(batt_dev) ||
ACPI_BATT_GET_STATUS(batt_dev, &bst[i]) != 0 ||
ACPI_BATT_GET_INFO(batt_dev, bif) != 0)
continue;
/* If a battery is not installed, we sometimes get strange values. */
if (!acpi_battery_bst_valid(&bst[i]) ||
!acpi_battery_bif_valid(bif))
continue;
/*
* Record current state. If both charging and discharging are set,
* ignore the charging flag.
*/
valid_units++;
if ((bst[i].state & ACPI_BATT_STAT_DISCHARG) != 0)
bst[i].state &= ~ACPI_BATT_STAT_CHARGING;
batt_stat |= bst[i].state;
bi[i].state = bst[i].state;
/*
* If the battery info is in terms of mA, convert to mW by
* multiplying by the design voltage. If the design voltage
* is 0 (due to some error reading the battery), skip this
* conversion.
*/
if (bif->units == ACPI_BIF_UNITS_MA && bif->dvol != 0 && dev == NULL) {
bst[i].rate = (bst[i].rate * bif->dvol) / 1000;
bst[i].cap = (bst[i].cap * bif->dvol) / 1000;
bif->lfcap = (bif->lfcap * bif->dvol) / 1000;
}
/*
* The calculation above may set bif->lfcap to zero. This was
* seen on a laptop with a broken battery. The result of the
* division was rounded to zero.
*/
if (!acpi_battery_bif_valid(bif))
continue;
/* Calculate percent capacity remaining. */
bi[i].cap = (100 * bst[i].cap) / bif->lfcap;
/*
* Some laptops report the "design-capacity" instead of the
* "real-capacity" when the battery is fully charged. That breaks
* the above arithmetic as it needs to be 100% maximum.
*/
if (bi[i].cap > 100)
bi[i].cap = 100;
/*
* On systems with more than one battery, they may get used
* sequentially, thus bst.rate may only signify the one currently
* in use. For the remaining batteries, bst.rate will be zero,
* which makes it impossible to calculate the total remaining time.
* Therefore, we sum the bst.rate for batteries in the discharging
* state and use the sum to calculate the total remaining time.
*/
if (bst[i].rate != ACPI_BATT_UNKNOWN &&
(bst[i].state & ACPI_BATT_STAT_DISCHARG) != 0)
valid_rate += bst[i].rate;
/*
* Some DSDTs report a negative 16-bit value for the rate and/or
* report 0 as 65536.
*/
if (acpi_quirks & ACPI_Q_BATT_RATE_ABS &&
bif->units == ACPI_BIF_UNITS_MA &&
bst[i].rate != ACPI_BATT_UNKNOWN &&
(int16_t)bst[i].rate < 0)
bst[i].rate = abs((int16_t)bst[i].rate);
}
/* If the caller asked for a device but we didn't find it, error. */
if (dev != NULL && dev_idx == -1) {
error = ENXIO;
goto out;
}
/* Pass 2: calculate capacity and remaining time for all batteries. */
total_cap = total_min = 0;
for (i = 0; i < devcount; i++) {
/*
* If any batteries are discharging, use the sum of the bst.rate
* values. Otherwise, we are on AC power, and there is infinite
* time remaining for this battery until we go offline.
*/
if (valid_rate > 0)
bi[i].min = (60 * bst[i].cap) / valid_rate;
else
bi[i].min = 0;
total_min += bi[i].min;
/* If this battery is not present, don't use its capacity. */
if (bi[i].cap != -1)
total_cap += bi[i].cap;
}
/*
* Return total battery percent and time remaining. If there are
* no valid batteries, report values as unknown.
*/
if (valid_units > 0) {
if (dev == NULL) {
battinfo->cap = total_cap / valid_units;
battinfo->min = total_min;
battinfo->state = batt_stat;
battinfo->rate = valid_rate;
} else {
battinfo->cap = bi[dev_idx].cap;
battinfo->min = bi[dev_idx].min;
battinfo->state = bi[dev_idx].state;
battinfo->rate = bst[dev_idx].rate;
}
/*
* If the queried battery has no discharge rate or is charging,
* report that we don't know the remaining time.
*/
if (valid_rate == 0 || (battinfo->state & ACPI_BATT_STAT_CHARGING))
battinfo->min = -1;
} else
acpi_reset_battinfo(battinfo);
error = 0;
out:
if (bi)
kfree(bi, M_TEMP);
if (bif)
kfree(bif, M_TEMP);
if (bst)
kfree(bst, M_TEMP);
return (error);
}
