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Subject[PATCH v2 03/10] Input - wacom: enhance Wireless Receiver battery reporting
Date
- Reports the current status of the battery (discharging, charging, full).
- Also notify the upower daemon when there is a change in the battery
value.
- keep the battery value as a percentage, not the raw value
- add WACOM_QUIRK_BATTERY to easily add a battery to a device (required
for Bluetooth devices)

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
---

changes in v2:
- add WACOM_QUIRK_BATTERY, which simplifies a bit the other patches

drivers/hid/wacom.h | 6 ++++++
drivers/hid/wacom_sys.c | 19 +++++++++++++++----
drivers/hid/wacom_wac.c | 22 ++++++++++++++++++----
drivers/hid/wacom_wac.h | 3 +++
4 files changed, 42 insertions(+), 8 deletions(-)

diff --git a/drivers/hid/wacom.h b/drivers/hid/wacom.h
index a678f82..99516ba 100644
--- a/drivers/hid/wacom.h
+++ b/drivers/hid/wacom.h
@@ -128,6 +128,12 @@ static inline void wacom_schedule_work(struct wacom_wac *wacom_wac)
schedule_work(&wacom->work);
}

+static inline void wacom_notify_battery(struct wacom_wac *wacom_wac)
+{
+ struct wacom *wacom = container_of(wacom_wac, struct wacom, wacom_wac);
+ power_supply_changed(&wacom->battery);
+}
+
extern const struct hid_device_id wacom_ids[];

void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len);
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index c857b3d..f0ee7ff 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -769,6 +769,7 @@ static void wacom_destroy_leds(struct wacom *wacom)
}

static enum power_supply_property wacom_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_CAPACITY
};
@@ -786,7 +787,16 @@ static int wacom_battery_get_property(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval =
- wacom->wacom_wac.battery_capacity * 100 / 31;
+ wacom->wacom_wac.battery_capacity;
+ break;
+ case POWER_SUPPLY_PROP_STATUS:
+ if (wacom->wacom_wac.bat_charging)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else if (wacom->wacom_wac.battery_capacity == 100 &&
+ wacom->wacom_wac.ps_connected)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
default:
ret = -EINVAL;
@@ -800,7 +810,7 @@ static int wacom_initialize_battery(struct wacom *wacom)
{
int error = 0;

- if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
+ if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {
wacom->battery.properties = wacom_battery_props;
wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
wacom->battery.get_property = wacom_battery_get_property;
@@ -821,8 +831,8 @@ static int wacom_initialize_battery(struct wacom *wacom)

static void wacom_destroy_battery(struct wacom *wacom)
{
- if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR &&
- wacom->battery.dev) {
+ if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
+ wacom->battery.dev) {
power_supply_unregister(&wacom->battery);
wacom->battery.dev = NULL;
}
@@ -947,6 +957,7 @@ static void wacom_wireless_work(struct work_struct *work)

if (wacom_wac->pid == 0) {
hid_info(wacom->hdev, "wireless tablet disconnected\n");
+ wacom_wac1->shared->type = 0;
} else {
const struct hid_device_id *id = wacom_ids;

diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index f30083f..2c69326 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -1365,7 +1365,7 @@ static int wacom_wireless_irq(struct wacom_wac *wacom, size_t len)

connected = data[1] & 0x01;
if (connected) {
- int pid, battery;
+ int pid, battery, ps_connected;

if ((wacom->shared->type == INTUOSHT) &&
wacom->shared->touch_max) {
@@ -1375,17 +1375,29 @@ static int wacom_wireless_irq(struct wacom_wac *wacom, size_t len)
}

pid = get_unaligned_be16(&data[6]);
- battery = data[5] & 0x3f;
+ battery = (data[5] & 0x3f) * 100 / 31;
+ ps_connected = !!(data[5] & 0x80);
if (wacom->pid != pid) {
wacom->pid = pid;
wacom_schedule_work(wacom);
}
- wacom->battery_capacity = battery;
+
+ if (wacom->shared->type &&
+ ((battery != wacom->battery_capacity) ||
+ (ps_connected != wacom->ps_connected))) {
+ wacom->battery_capacity = battery;
+ wacom->ps_connected = ps_connected;
+ wacom->bat_charging = ps_connected &&
+ wacom->battery_capacity < 100;
+ wacom_notify_battery(wacom);
+ }
} else if (wacom->pid != 0) {
/* disconnected while previously connected */
wacom->pid = 0;
wacom_schedule_work(wacom);
wacom->battery_capacity = 0;
+ wacom->bat_charging = 0;
+ wacom->ps_connected = 0;
}

return 0;
@@ -1558,8 +1570,10 @@ void wacom_setup_device_quirks(struct wacom_features *features)
features->quirks |= WACOM_QUIRK_NO_INPUT;

/* must be monitor interface if no device_type set */
- if (!features->device_type)
+ if (!features->device_type) {
features->quirks |= WACOM_QUIRK_MONITOR;
+ features->quirks |= WACOM_QUIRK_BATTERY;
+ }
}
}

diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h
index 4c59247..8a042ac 100644
--- a/drivers/hid/wacom_wac.h
+++ b/drivers/hid/wacom_wac.h
@@ -68,6 +68,7 @@
#define WACOM_QUIRK_BBTOUCH_LOWRES 0x0002
#define WACOM_QUIRK_NO_INPUT 0x0004
#define WACOM_QUIRK_MONITOR 0x0008
+#define WACOM_QUIRK_BATTERY 0x0010

enum {
PENPARTNER = 0,
@@ -164,6 +165,8 @@ struct wacom_wac {
int pid;
int battery_capacity;
int num_contacts_left;
+ int bat_charging;
+ int ps_connected;
};

#endif
--
2.0.1


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