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HID: logitech-hidpp: BatteryVoltage: only read chargeStatus if extPower is active

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In the HID++ 2.0 function getBatteryInfo() from the BatteryVoltage
(0x1001) feature, chargeStatus is only valid if extPower is active.

Previously we were ignoring extPower, which resulted in wrong values.

Example:
    With an unplugged mouse

    $ cat /sys/class/power_supply/hidpp_battery_0/status
    Charging

This patch fixes that, it also renames charge_sts to flags as
charge_sts can be confused with chargeStatus from the spec.

Spec:
+--------+-------------------------------------------------------------------------+
|  byte  |                                    2                                    |
+--------+--------------+------------+------------+----------+----------+----------+
|   bit  |     0..2     |      3     |      4     |     5    |     6    |     7    |
+--------+--------------+------------+------------+----------+----------+----------+
| buffer | chargeStatus | fastCharge | slowCharge | critical | (unused) | extPower |
+--------+--------------+------------+------------+----------+----------+----------+
Table 1 - battery voltage (0x1001), getBatteryInfo() (ASE 0), 3rd byte

+-------+--------------------------------------+
| value |                meaning               |
+-------+--------------------------------------+
|   0   | Charging                             |
+-------+--------------------------------------+
|   1   | End of charge (100% charged)         |
+-------+--------------------------------------+
|   2   | Charge stopped (any "normal" reason) |
+-------+--------------------------------------+
|   7   | Hardware error                       |
+-------+--------------------------------------+
Table 2 - chargeStatus value

Signed-off-by: Filipe Laíns <lains@archlinux.org>
Tested-by: Pedro Vanzella <pedro@pedrovanzella.com>
Reviewed-by: Pedro Vanzella <pedro@pedrovanzella.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
This commit is contained in:
Filipe Laíns 2020-01-11 19:24:19 +00:00 committed by Benjamin Tissoires
parent 12fb2b993e
commit 4ab2bb3c31
1 changed files with 21 additions and 22 deletions
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43
drivers/hid/hid-logitech-hidpp.c
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@ -1256,36 +1256,35 @@ static int hidpp20_battery_map_status_voltage(u8 data[3], int *voltage,
{
int status;
long charge_sts = (long)data[2];
long flags = (long) data[2];
*level = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
switch (data[2] & 0xe0) {
case 0x00:
status = POWER_SUPPLY_STATUS_CHARGING;
break;
case 0x20:
status = POWER_SUPPLY_STATUS_FULL;
*level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
break;
case 0x40:
if (flags & 0x80)
switch (flags & 0x07) {
case 0:
status = POWER_SUPPLY_STATUS_CHARGING;
break;
case 1:
status = POWER_SUPPLY_STATUS_FULL;
*level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
break;
case 2:
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
default:
status = POWER_SUPPLY_STATUS_UNKNOWN;
break;
}
else
status = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case 0xe0:
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
default:
status = POWER_SUPPLY_STATUS_UNKNOWN;
}
*charge_type = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
if (test_bit(3, &charge_sts)) {
if (test_bit(3, &flags)) {
*charge_type = POWER_SUPPLY_CHARGE_TYPE_FAST;
}
if (test_bit(4, &charge_sts)) {
if (test_bit(4, &flags)) {
*charge_type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
}
if (test_bit(5, &charge_sts)) {
if (test_bit(5, &flags)) {
*level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
}