1 /* 2 * HID driver for various devices which are apparently based on the same chipset 3 * from certain vendor which produces chips that contain wrong LogicalMaximum 4 * value in their HID report descriptor. Currently supported devices are: 5 * 6 * Ortek PKB-1700 7 * Ortek WKB-2000 8 * Skycable wireless presenter 9 * 10 * Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com> 11 * Copyright (c) 2011 Jiri Kosina 12 */ 13 14 /* 15 * This program is free software; you can redistribute it and/or modify it 16 * under the terms of the GNU General Public License as published by the Free 17 * Software Foundation; either version 2 of the License, or (at your option) 18 * any later version. 19 */ 20 21 #include <linux/device.h> 22 #include <linux/hid.h> 23 #include <linux/module.h> 24 25 #include "hid-ids.h" 26 27 static __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc, 28 unsigned int *rsize) 29 { 30 if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) { 31 hid_info(hdev, "Fixing up logical minimum in report descriptor (Ortek)\n"); 32 rdesc[55] = 0x92; 33 } else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) { 34 hid_info(hdev, "Fixing up logical minimum in report descriptor (Skycable)\n"); 35 rdesc[53] = 0x65; 36 } 37 return rdesc; 38 } 39 40 static const struct hid_device_id ortek_devices[] = { 41 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) }, 42 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) }, 43 { HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) }, 44 { } 45 }; 46 MODULE_DEVICE_TABLE(hid, ortek_devices); 47 48 static struct hid_driver ortek_driver = { 49 .name = "ortek", 50 .id_table = ortek_devices, 51 .report_fixup = ortek_report_fixup 52 }; 53 54 static int __init ortek_init(void) 55 { 56 return hid_register_driver(&ortek_driver); 57 } 58 59 static void __exit ortek_exit(void) 60 { 61 hid_unregister_driver(&ortek_driver); 62 } 63 64 module_init(ortek_init); 65 module_exit(ortek_exit); 66 MODULE_LICENSE("GPL"); 67