+#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
+/*percent of battery capacity, 0 means AC online*/
+static unsigned short batcap[8] = { 1, 15, 25, 35, 50, 70, 100, 0 };
+
+static enum power_supply_property wacom_battery_props[] = {
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_CAPACITY
+};
+
+static enum power_supply_property wacom_ac_props[] = {
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_ONLINE
+};
+
+static int wacom_battery_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct wacom_data *wdata = container_of(psy,
+ struct wacom_data, battery);
+ int power_state = batcap[wdata->battery_capacity];
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = 1;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ /* show 100% battery capacity when charging */
+ if (power_state == 0)
+ val->intval = 100;
+ else
+ val->intval = power_state;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static int wacom_ac_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct wacom_data *wdata = container_of(psy, struct wacom_data, ac);
+ int power_state = batcap[wdata->battery_capacity];
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ /* fall through */
+ case POWER_SUPPLY_PROP_ONLINE:
+ if (power_state == 0)
+ val->intval = 1;
+ else
+ val->intval = 0;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+#endif
+
+static void wacom_poke(struct hid_device *hdev, u8 speed)
+{
+ struct wacom_data *wdata = hid_get_drvdata(hdev);
+ int limit, ret;
+ char rep_data[2];
+
+ rep_data[0] = 0x03 ; rep_data[1] = 0x00;
+ limit = 3;
+ do {
+ ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+ HID_FEATURE_REPORT);
+ } while (ret < 0 && limit-- > 0);
+
+ if (ret >= 0) {
+ if (speed == 0)
+ rep_data[0] = 0x05;
+ else
+ rep_data[0] = 0x06;
+
+ rep_data[1] = 0x00;
+ limit = 3;
+ do {
+ ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+ HID_FEATURE_REPORT);
+ } while (ret < 0 && limit-- > 0);
+
+ if (ret >= 0) {
+ wdata->high_speed = speed;
+ return;
+ }
+ }
+
+ /*
+ * Note that if the raw queries fail, it's not a hard failure and it
+ * is safe to continue
+ */
+ dev_warn(&hdev->dev, "failed to poke device, command %d, err %d\n",
+ rep_data[0], ret);
+ return;
+}
+
+static ssize_t wacom_show_speed(struct device *dev,
+ struct device_attribute
+ *attr, char *buf)
+{
+ struct wacom_data *wdata = dev_get_drvdata(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%i\n", wdata->high_speed);
+}
+
+static ssize_t wacom_store_speed(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+ int new_speed;
+
+ if (sscanf(buf, "%1d", &new_speed ) != 1)
+ return -EINVAL;
+
+ if (new_speed == 0 || new_speed == 1) {
+ wacom_poke(hdev, new_speed);
+ return strnlen(buf, PAGE_SIZE);
+ } else
+ return -EINVAL;
+}
+
+static DEVICE_ATTR(speed, S_IRUGO | S_IWUGO,
+ wacom_show_speed, wacom_store_speed);
+