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 * iHome IMAC-A210S 9 * Skycable wireless presenter 10 * 11 * Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com> 12 * Copyright (c) 2011 Jiri Kosina 13 */ 14 15 /* 16 * This program is free software; you can redistribute it and/or modify it 17 * under the terms of the GNU General Public License as published by the Free 18 * Software Foundation; either version 2 of the License, or (at your option) 19 * any later version. 20 */ 21 22 #include <linux/device.h> 23 #include <linux/hid.h> 24 #include <linux/module.h> 25 26 #include "hid-ids.h" 27 28 static __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc, 29 unsigned int *rsize) 30 { 31 if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) { 32 hid_info(hdev, "Fixing up logical maximum in report descriptor (Ortek)\n"); 33 rdesc[55] = 0x92; 34 } else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) { 35 hid_info(hdev, "Fixing up logical maximum in report descriptor (Skycable)\n"); 36 rdesc[53] = 0x65; 37 } 38 return rdesc; 39 } 40 41 static const struct hid_device_id ortek_devices[] = { 42 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) }, 43 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) }, 44 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_IHOME_IMAC_A210S) }, 45 { HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) }, 46 { } 47 }; 48 MODULE_DEVICE_TABLE(hid, ortek_devices); 49 50 static struct hid_driver ortek_driver = { 51 .name = "ortek", 52 .id_table = ortek_devices, 53 .report_fixup = ortek_report_fixup 54 }; 55 module_hid_driver(ortek_driver); 56 57 MODULE_LICENSE("GPL"); 58