Report the battery capacity percentage for the Apple Magic Mouse 2
and the Apple Magic Trackpad 2 when they are connected over bluetooth.
Signed-off-by: José Expósito <jose.exposito89@xxxxxxxxx>
---
drivers/hid/hid-magicmouse.c | 54 ++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index 0f766bce4537..d4a58dd6d2b8 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -57,6 +57,8 @@ MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state fie
#define MOUSE_REPORT_ID 0x29
#define MOUSE2_REPORT_ID 0x12
#define DOUBLE_REPORT_ID 0xf7
+#define BT_BATTERY_REPORT_ID 0x90
+
/* These definitions are not precise, but they're close enough. (Bits
* 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
* to be some kind of bit mask -- 0x20 may be a near-field reading,
@@ -139,12 +141,14 @@ struct magicmouse_sc {
struct {
struct power_supply *ps;
struct power_supply_desc ps_desc;
+ int capacity;
} battery;
};
static enum power_supply_property magicmouse_ps_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_SCOPE,
+ POWER_SUPPLY_PROP_CAPACITY,
};
static bool magicmouse_can_report_battery(struct magicmouse_sc *msc)
@@ -153,6 +157,49 @@ static bool magicmouse_can_report_battery(struct magicmouse_sc *msc)
(msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2);
}
+static bool magicmouse_can_report_battery_vendor(struct magicmouse_sc *msc,
+ unsigned short vendor)
+{
+ return magicmouse_can_report_battery(msc) &&
+ (msc->input->id.vendor == vendor);
+}
+
+static int magicmouse_battery_bt_get_capacity(struct magicmouse_sc *msc)
+{
+ struct hid_report_enum report_enum;
+ struct hid_report *report;
+ int ret;
+
+ if (!magicmouse_can_report_battery_vendor(msc, BT_VENDOR_ID_APPLE))
+ return -EINVAL;
+
+ report_enum = msc->hdev->report_enum[HID_INPUT_REPORT];
+ report = report_enum.report_id_hash[BT_BATTERY_REPORT_ID];
+
+ if (!report || report->maxfield < 1) {
+ hid_err(msc->hdev, "failed to retrieve report with ID %d\n",
+ BT_BATTERY_REPORT_ID);
+ return -EINVAL;
+ }
+
+ hid_hw_request(msc->hdev, report, HID_REQ_GET_REPORT);
+
+ if (!report || report->maxfield < 2) {
+ hid_err(msc->hdev, "invalid report->maxfield: %d\n",
+ report->maxfield);
+ return -EINVAL;
+ }
+
+ ret = report->field[0]->value[0];
+ if (ret < 0) {
+ hid_err(msc->hdev, "invalid report status %d\n", ret);
+ return ret;
+ }
+
+ msc->battery.capacity = report->field[1]->value[0];
+ return 0;
+}
+
static int magicmouse_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
@@ -170,6 +217,12 @@ static int magicmouse_battery_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_DEVICE;
break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ if (msc->input->id.vendor == BT_VENDOR_ID_APPLE)
+ magicmouse_battery_bt_get_capacity(msc);
+
+ val->intval = msc->battery.capacity;
+ break;
default:
ret = -EINVAL;
break;
@@ -188,6 +241,7 @@ static int magicmouse_battery_probe(struct hid_device *hdev)
if (!magicmouse_can_report_battery(msc))
return 0;
+ msc->battery.capacity = 100;
msc->battery.ps_desc.type = POWER_SUPPLY_TYPE_BATTERY;
msc->battery.ps_desc.properties = magicmouse_ps_props;
msc->battery.ps_desc.num_properties = ARRAY_SIZE(magicmouse_ps_props);
--
2.25.1
