+static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
+{
+ struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+
+ if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
+ /* Change usage maximum and logical maximum from 0x7fff to
+ * 0x2fff, so they don't exceed HID_MAX_USAGES */
+ switch (hdev->product) {
+ case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:
+ if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f
+ && rdesc[69] == 0xff && rdesc[70] == 0x7f) {
+ hid_info(hdev, "Fixing up report descriptor\n");
+ rdesc[65] = rdesc[70] = 0x2f;
+ }
+ break;
+ }
+
+ }
+ return rdesc;
+}
+
+