diff options
author | Jason Gerecke <killertofu@gmail.com> | 2015-03-11 17:25:41 (GMT) |
---|---|---|
committer | Jiri Kosina <jkosina@suse.cz> | 2015-03-11 17:50:04 (GMT) |
commit | 71fa641ebbfd2402bdb76d3c6ba7e4a2d1eb2dfc (patch) | |
tree | 98f85a9921254a670904652bdf10205a5b1a149a /drivers/hid | |
parent | 8fac1722140019d6a53f7b280f8b785707a16f66 (diff) | |
download | linux-71fa641ebbfd2402bdb76d3c6ba7e4a2d1eb2dfc.tar.xz |
HID: wacom: Add battery presence indicator to wireless tablets
Declare the POWER_SUPPLY_PROP_PRESENT property to provide userspace
with a way to determine if the battery on a wireless tablet is plugged
in. Although current wireless tablets do not explicitly report this
information, it can be inferred from other state information. In
particular, a battery is assumed to be present if any of the following
are true: a non-zero battery level reported, the battery is reported as
charging, or the tablet is operating wirelessly.
Note: The last condition above may not strictly hold for the Graphire
Wireless (it charges from a DC barrel jack instead of a USB port), but I
do not know what is reported in the no-battery condition.
Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r-- | drivers/hid/wacom_sys.c | 4 | ||||
-rw-r--r-- | drivers/hid/wacom_wac.c | 16 | ||||
-rw-r--r-- | drivers/hid/wacom_wac.h | 1 |
3 files changed, 15 insertions, 6 deletions
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c index 955ce7c..ab7bf84 100644 --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -945,6 +945,7 @@ static void wacom_destroy_leds(struct wacom *wacom) } static enum power_supply_property wacom_battery_props[] = { + POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_SCOPE, POWER_SUPPLY_PROP_CAPACITY @@ -964,6 +965,9 @@ static int wacom_battery_get_property(struct power_supply *psy, int ret = 0; switch (psp) { + case POWER_SUPPLY_PROP_PRESENT: + val->intval = wacom->wacom_wac.bat_connected; + break; case POWER_SUPPLY_PROP_SCOPE: val->intval = POWER_SUPPLY_SCOPE_DEVICE; break; diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index 57faf5b..9262622 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -46,16 +46,19 @@ static unsigned short batcap_gr[8] = { 1, 15, 25, 35, 50, 70, 100, 100 }; static unsigned short batcap_i4[8] = { 1, 15, 30, 45, 60, 70, 85, 100 }; static void wacom_notify_battery(struct wacom_wac *wacom_wac, - int bat_capacity, bool bat_charging, bool ps_connected) + int bat_capacity, bool bat_charging, bool bat_connected, + bool ps_connected) { struct wacom *wacom = container_of(wacom_wac, struct wacom, wacom_wac); bool changed = wacom_wac->battery_capacity != bat_capacity || wacom_wac->bat_charging != bat_charging || + wacom_wac->bat_connected != bat_connected || wacom_wac->ps_connected != ps_connected; if (changed) { wacom_wac->battery_capacity = bat_capacity; wacom_wac->bat_charging = bat_charging; + wacom_wac->bat_connected = bat_connected; wacom_wac->ps_connected = ps_connected; if (wacom->battery.dev) @@ -438,7 +441,7 @@ static int wacom_graphire_irq(struct wacom_wac *wacom) battery_capacity = batcap_gr[rw]; ps_connected = rw == 7; wacom_notify_battery(wacom, battery_capacity, ps_connected, - ps_connected); + 1, ps_connected); } exit: return retval; @@ -1029,6 +1032,7 @@ static int wacom_intuos_bt_irq(struct wacom_wac *wacom, size_t len) ps_connected = (power_raw & 0x10) ? 1 : 0; battery_capacity = batcap_i4[power_raw & 0x07]; wacom_notify_battery(wacom, battery_capacity, bat_charging, + battery_capacity || bat_charging, ps_connected); break; default: @@ -1936,13 +1940,13 @@ static int wacom_wireless_irq(struct wacom_wac *wacom, size_t len) } if (wacom->shared->type) - wacom_notify_battery(wacom, battery, charging, 0); + wacom_notify_battery(wacom, battery, charging, 1, 0); } else if (wacom->pid != 0) { /* disconnected while previously connected */ wacom->pid = 0; wacom_schedule_work(wacom); - wacom_notify_battery(wacom, 0, 0, 0); + wacom_notify_battery(wacom, 0, 0, 0, 0); } return 0; @@ -1970,7 +1974,7 @@ static int wacom_status_irq(struct wacom_wac *wacom_wac, size_t len) bool charging = !!(data[8] & 0x80); wacom_notify_battery(wacom_wac, battery, charging, - 1); + battery || charging, 1); if (!wacom->battery.dev && !(features->quirks & WACOM_QUIRK_BATTERY)) { @@ -1984,7 +1988,7 @@ static int wacom_status_irq(struct wacom_wac *wacom_wac, size_t len) features->quirks &= ~WACOM_QUIRK_BATTERY; INIT_WORK(&wacom->work, wacom_battery_work); wacom_schedule_work(wacom_wac); - wacom_notify_battery(wacom_wac, 0, 0, 0); + wacom_notify_battery(wacom_wac, 0, 0, 0, 0); } return 0; } diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h index a3d0828..1c7d893 100644 --- a/drivers/hid/wacom_wac.h +++ b/drivers/hid/wacom_wac.h @@ -212,6 +212,7 @@ struct wacom_wac { int battery_capacity; int num_contacts_left; int bat_charging; + int bat_connected; int ps_connected; u8 bt_features; u8 bt_high_speed; |