/*********************************************************************
* Battery properties
*********************************************************************/
static int olpc_bat_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret = 0;
__be16 ec_word;
uint8_t ec_byte;
__be64 ser_buf;
ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
if (ret)
return ret;
/* Theoretically there's a race here -- the battery could be
removed immediately after we check whether it's present, and
then we query for some other property of the now-absent battery.
It doesn't matter though -- the EC will return the last-known
information, and it's as if we just ran that _little_ bit faster
and managed to read it out before the battery went away. */
if (!(ec_byte & (BAT_STAT_PRESENT | BAT_STAT_TRICKLE)) &&
psp != POWER_SUPPLY_PROP_PRESENT)
return -ENODEV;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = olpc_bat_get_status(val, ec_byte);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (ec_byte & BAT_STAT_TRICKLE)
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
else if (ec_byte & BAT_STAT_CHARGING)
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
else
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!(ec_byte & (BAT_STAT_PRESENT |
BAT_STAT_TRICKLE));
break;
case POWER_SUPPLY_PROP_HEALTH:
if (ec_byte & BAT_STAT_DESTROY)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
else {
ret = olpc_bat_get_health(val);
if (ret)
return ret;
}
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
ret = olpc_bat_get_mfr(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
ret = olpc_bat_get_tech(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (s16)be16_to_cpu(ec_word) * 9760L / 32;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (s16)be16_to_cpu(ec_word) * 15625L / 120;
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
if (ret)
return ret;
val->intval = ec_byte;
break;
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
if (ec_byte & BAT_STAT_FULL)
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (ec_byte & BAT_STAT_LOW)
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
else
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
ret = olpc_bat_get_charge_full_design(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
ret = olpc_bat_get_charge_now(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_TEMP:
ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (s16)be16_to_cpu(ec_word) * 100 / 256;
break;
case POWER_SUPPLY_PROP_TEMP_AMBIENT:
ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 100 / 256;
break;
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (s16)be16_to_cpu(ec_word) * 6250 / 15;
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);
if (ret)
return ret;
sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
val->strval = bat_serial;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int olpc_bat_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret = 0;
__be16 ec_word;
uint8_t ec_byte;
__be64 ser_buf;
ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
if (ret)
return ret;
if (!(ec_byte & (BAT_STAT_PRESENT | BAT_STAT_TRICKLE)) &&
psp != POWER_SUPPLY_PROP_PRESENT)
return -ENODEV;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = olpc_bat_get_status(val, ec_byte);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (ec_byte & BAT_STAT_TRICKLE)
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
else if (ec_byte & BAT_STAT_CHARGING)
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
else
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!(ec_byte & (BAT_STAT_PRESENT |
BAT_STAT_TRICKLE));
break;
case POWER_SUPPLY_PROP_HEALTH:
if (ec_byte & BAT_STAT_DESTROY)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
else {
ret = olpc_bat_get_health(val);
if (ret)
return ret;
}
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
ret = olpc_bat_get_mfr(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
ret = olpc_bat_get_tech(val);
if (ret)
return ret;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 9760L / 32;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 15625L / 120;
break;
case POWER_SUPPLY_PROP_CAPACITY:
ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
if (ret)
return ret;
val->intval = ec_byte;
break;
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
if (ec_byte & BAT_STAT_FULL)
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (ec_byte & BAT_STAT_LOW)
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
else
val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
break;
case POWER_SUPPLY_PROP_TEMP:
ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 100 / 256;
break;
case POWER_SUPPLY_PROP_TEMP_AMBIENT:
ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 100 / 256;
break;
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);
if (ret)
return ret;
val->intval = (int)be16_to_cpu(ec_word) * 6250 / 15;
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);
if (ret)
return ret;
sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
val->strval = bat_serial;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}