[PATCH 1/2] HID: Add driver for Holtek gaming mouse 04d9:a067

Christian Ohm
2013-05-20T23:31:19Z

This mouse is sold as Sharkoon Drakonia and Perixx MX-2000 and reports a
too high usage maximum and logical maximum. This driver fixes the report
descriptor so those values don't exceed HID_MAX_USAGES.

Signed-off-by: Christian Ohm <chr.ohm@gmx.net>
---
drivers/hid/Kconfig | 1 +
drivers/hid/Makefile | 1 +
drivers/hid/hid-holtek-mouse.c | 72 ++++++++++++++++++++++++++++++++++++++++
drivers/hid/hid-ids.h | 1 +
4 files changed, 75 insertions(+)
create mode 100644 drivers/hid/hid-holtek-mouse.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index e7d6a13..d661a41 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -220,6 +220,7 @@ config HID_HOLTEK
Support for Holtek based devices:
- Holtek On Line Grip based game controller
- Trust GXT 18 Gaming Keyboard
+ - Sharkoon Drakonia / Perixx MX-2000 gaming mice

config HOLTEK_FF
bool "Holtek On Line Grip force feedback support"
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index b622157..c39bfc4 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -50,6 +50,7 @@ obj-$(CONFIG_HID_ELECOM) += hid-elecom.o
obj-$(CONFIG_HID_EZKEY) += hid-ezkey.o
obj-$(CONFIG_HID_GYRATION) += hid-gyration.o
obj-$(CONFIG_HID_HOLTEK) += hid-holtek-kbd.o
+obj-$(CONFIG_HID_HOLTEK) += hid-holtek-mouse.o
obj-$(CONFIG_HID_HOLTEK) += hid-holtekff.o
obj-$(CONFIG_HID_HYPERV_MOUSE) += hid-hyperv.o
obj-$(CONFIG_HID_ICADE) += hid-icade.o
diff --git a/drivers/hid/hid-holtek-mouse.c b/drivers/hid/hid-holtek-mouse.c
new file mode 100644
index 0000000..f32e29a
--- /dev/null
+++ b/drivers/hid/hid-holtek-mouse.c
@@ -0,0 +1,72 @@
+/*
+ * 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.
+ */
+
+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 */
+ 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;
+ }
+ }
+ 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) },
+ { }
+};
+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,
+};
+
+static int __init holtek_mouse_init(void)
+{
+ return hid_register_driver(&holtek_mouse_driver);
+}
+
+static void __exit holtek_mouse_exit(void)
+{
+ hid_unregister_driver(&holtek_mouse_driver);
+}
+
+module_exit(holtek_mouse_exit);
+module_init(holtek_mouse_init);
+MODULE_LICENSE("GPL");
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 160a309..00f7ba9 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -435,6 +435,7 @@

#define USB_VENDOR_ID_HOLTEK_ALT 0x04d9
#define USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD 0xa055
+#define USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067 0xa067

#define USB_VENDOR_ID_IMATION 0x0718
#define USB_DEVICE_ID_DISC_STAKKA 0xd000
--
1.7.10.4