diff options
Diffstat (limited to 'drivers/hid/hid-holtek-mouse.c')
| -rw-r--r-- | drivers/hid/hid-holtek-mouse.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/hid/hid-holtek-mouse.c b/drivers/hid/hid-holtek-mouse.c new file mode 100644 index 00000000000..7e6db3cf46f --- /dev/null +++ b/drivers/hid/hid-holtek-mouse.c @@ -0,0 +1,77 @@ +/* + * HID driver for Holtek gaming mice + * Copyright (c) 2013 Christian Ohm + * Heavily inspired by various other HID drivers that adjust the report + * descriptor. +*/ + +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + */ + +#include <linux/hid.h> +#include <linux/module.h> +#include <linux/usb.h> + +#include "hid-ids.h" + +/* + * The report descriptor of some Holtek based gaming mice specifies an + * excessively large number of consumer usages (2^15), which is more than + * HID_MAX_USAGES. This prevents proper parsing of the report descriptor. + * + * This driver fixes the report descriptor for: + * - USB ID 04d9:a067, sold as Sharkoon Drakonia and Perixx MX-2000 + * - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200 + * and Zalman ZM-GM1 + */ + +static __u8 *holtek_mouse_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_HOLTEK_ALT_MOUSE_A067: + if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f + && rdesc[120] == 0xff && rdesc[121] == 0x7f) { + hid_info(hdev, "Fixing up report descriptor\n"); + rdesc[116] = rdesc[121] = 0x2f; + } + break; + case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A: + if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f + && rdesc[111] == 0xff && rdesc[112] == 0x7f) { + hid_info(hdev, "Fixing up report descriptor\n"); + rdesc[107] = rdesc[112] = 0x2f; + } + break; + } + + } + return rdesc; +} + +static const struct hid_device_id holtek_mouse_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, + USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) }, + { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, + USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) }, + { } +}; +MODULE_DEVICE_TABLE(hid, holtek_mouse_devices); + +static struct hid_driver holtek_mouse_driver = { + .name = "holtek_mouse", + .id_table = holtek_mouse_devices, + .report_fixup = holtek_mouse_report_fixup, +}; + +module_hid_driver(holtek_mouse_driver); +MODULE_LICENSE("GPL"); |