1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * HID driver for various devices which are apparently based on the same chipset 4 * from certain vendor which produces chips that contain wrong LogicalMaximum 5 * value in their HID report descriptor. Currently supported devices are: 6 * 7 * Ortek PKB-1700 8 * Ortek WKB-2000 9 * iHome IMAC-A210S 10 * Skycable wireless presenter 11 * 12 * Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com> 13 * Copyright (c) 2011 Jiri Kosina 14 */ 15 16 /* 17 */ 18 19 #include <linux/device.h> 20 #include <linux/hid.h> 21 #include <linux/module.h> 22 23 #include "hid-ids.h" 24 25 static __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc, 26 unsigned int *rsize) 27 { 28 if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) { 29 hid_info(hdev, "Fixing up logical maximum in report descriptor (Ortek)\n"); 30 rdesc[55] = 0x92; 31 } else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) { 32 hid_info(hdev, "Fixing up logical maximum in report descriptor (Skycable)\n"); 33 rdesc[53] = 0x65; 34 } 35 return rdesc; 36 } 37 38 static const struct hid_device_id ortek_devices[] = { 39 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) }, 40 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) }, 41 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_IHOME_IMAC_A210S) }, 42 { HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) }, 43 { } 44 }; 45 MODULE_DEVICE_TABLE(hid, ortek_devices); 46 47 static struct hid_driver ortek_driver = { 48 .name = "ortek", 49 .id_table = ortek_devices, 50 .report_fixup = ortek_report_fixup 51 }; 52 module_hid_driver(ortek_driver); 53 54 MODULE_LICENSE("GPL"); 55