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linux/drivers/hid/hid-waltop.c
Nikolai Kondrashov 56d27dd6ec HID: waltop: Replace original rdescs with links 
Replace original report descriptor dumps in the comments with links to tablet
descriptions in a wiki, to make code clearer.

Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-03-06 11:20:54 +01:00

519 lines
26 KiB
C
Raw Blame History

/*
* HID driver for Waltop devices not fully compliant with HID standard
*
* Copyright (c) 2010 Nikolai Kondrashov
*/
/*
* 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/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include "hid-ids.h"
/*
* There exists an official driver on the manufacturer's website, which
* wasn't submitted to the kernel, for some reason. The official driver
* doesn't seem to support extra features of some tablets, like wheels.
*
* It shows that the feature report ID 2 could be used to control any waltop
* tablet input mode, switching it between "default", "tablet" and "ink".
*
* This driver only uses "default" mode for all the supported tablets. This
* mode tries to be HID-compatible (not very successfully), but cripples the
* resolution of some tablets.
*
* The "tablet" mode uses some proprietary, yet decipherable protocol, which
* represents the correct resolution, but is possibly HID-incompatible (i.e.
* indescribable by a report descriptor).
*
* The purpose of the "ink" mode is unknown.
*
* The feature reports needed for switching to each mode are these:
*
* 02 16 00 default
* 02 16 01 tablet
* 02 16 02 ink
*/
/*
* See Slim Tablet 5.8 inch description, device and HID report descriptors at
* http://sf.net/apps/mediawiki/digimend/?title=Waltop_Slim_Tablet_5.8%22
*/
/* Size of the original report descriptor of Slim Tablet 5.8 inch */
#define SLIM_TABLET_5_8_INCH_RDESC_ORIG_SIZE 222
/* Fixed Slim Tablet 5.8 inch descriptor */
static __u8 slim_tablet_5_8_inch_rdesc_fixed[] = {
0x05, 0x0D, /* Usage Page (Digitizer), */
0x09, 0x02, /* Usage (Pen), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x10, /* Report ID (16), */
0x09, 0x20, /* Usage (Stylus), */
0xA0, /* Collection (Physical), */
0x09, 0x42, /* Usage (Tip Switch), */
0x09, 0x44, /* Usage (Barrel Switch), */
0x09, 0x46, /* Usage (Tablet Pick), */
0x15, 0x01, /* Logical Minimum (1), */
0x25, 0x03, /* Logical Maximum (3), */
0x75, 0x04, /* Report Size (4), */
0x95, 0x01, /* Report Count (1), */
0x80, /* Input, */
0x09, 0x32, /* Usage (In Range), */
0x14, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x75, 0x01, /* Report Size (1), */
0x95, 0x01, /* Report Count (1), */
0x81, 0x02, /* Input (Variable), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x03, /* Input (Constant, Variable), */
0x75, 0x10, /* Report Size (16), */
0x95, 0x01, /* Report Count (1), */
0x14, /* Logical Minimum (0), */
0xA4, /* Push, */
0x05, 0x01, /* Usage Page (Desktop), */
0x65, 0x13, /* Unit (Inch), */
0x55, 0xFD, /* Unit Exponent (-3), */
0x34, /* Physical Minimum (0), */
0x09, 0x30, /* Usage (X), */
0x46, 0x88, 0x13, /* Physical Maximum (5000), */
0x26, 0x10, 0x27, /* Logical Maximum (10000), */
0x81, 0x02, /* Input (Variable), */
0x09, 0x31, /* Usage (Y), */
0x46, 0xB8, 0x0B, /* Physical Maximum (3000), */
0x26, 0x70, 0x17, /* Logical Maximum (6000), */
0x81, 0x02, /* Input (Variable), */
0xB4, /* Pop, */
0x09, 0x30, /* Usage (Tip Pressure), */
0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
0x81, 0x02, /* Input (Variable), */
0xC0, /* End Collection, */
0xC0 /* End Collection */
};
/*
* See Slim Tablet 12.1 inch description, device and HID report descriptors at
* http://sf.net/apps/mediawiki/digimend/?title=Waltop_Slim_Tablet_12.1%22
*/
/* Size of the original report descriptor of Slim Tablet 12.1 inch */
#define SLIM_TABLET_12_1_INCH_RDESC_ORIG_SIZE 269
/* Fixed Slim Tablet 12.1 inch descriptor */
static __u8 slim_tablet_12_1_inch_rdesc_fixed[] = {
0x05, 0x0D, /* Usage Page (Digitizer), */
0x09, 0x02, /* Usage (Pen), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x10, /* Report ID (16), */
0x09, 0x20, /* Usage (Stylus), */
0xA0, /* Collection (Physical), */
0x09, 0x42, /* Usage (Tip Switch), */
0x09, 0x44, /* Usage (Barrel Switch), */
0x09, 0x46, /* Usage (Tablet Pick), */
0x15, 0x01, /* Logical Minimum (1), */
0x25, 0x03, /* Logical Maximum (3), */
0x75, 0x04, /* Report Size (4), */
0x95, 0x01, /* Report Count (1), */
0x80, /* Input, */
0x09, 0x32, /* Usage (In Range), */
0x14, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x75, 0x01, /* Report Size (1), */
0x95, 0x01, /* Report Count (1), */
0x81, 0x02, /* Input (Variable), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x03, /* Input (Constant, Variable), */
0x75, 0x10, /* Report Size (16), */
0x95, 0x01, /* Report Count (1), */
0x14, /* Logical Minimum (0), */
0xA4, /* Push, */
0x05, 0x01, /* Usage Page (Desktop), */
0x65, 0x13, /* Unit (Inch), */
0x55, 0xFD, /* Unit Exponent (-3), */
0x34, /* Physical Minimum (0), */
0x09, 0x30, /* Usage (X), */
0x46, 0x10, 0x27, /* Physical Maximum (10000), */
0x26, 0x20, 0x4E, /* Logical Maximum (20000), */
0x81, 0x02, /* Input (Variable), */
0x09, 0x31, /* Usage (Y), */
0x46, 0x6A, 0x18, /* Physical Maximum (6250), */
0x26, 0xD4, 0x30, /* Logical Maximum (12500), */
0x81, 0x02, /* Input (Variable), */
0xB4, /* Pop, */
0x09, 0x30, /* Usage (Tip Pressure), */
0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
0x81, 0x02, /* Input (Variable), */
0xC0, /* End Collection, */
0xC0 /* End Collection */
};
/*
* See Q Pad description, device and HID report descriptors at
* http://sf.net/apps/mediawiki/digimend/?title=Waltop_Q_Pad
*/
/* Size of the original report descriptor of Q Pad */
#define Q_PAD_RDESC_ORIG_SIZE 241
/* Fixed Q Pad descriptor */
static __u8 q_pad_rdesc_fixed[] = {
0x05, 0x0D, /* Usage Page (Digitizer), */
0x09, 0x02, /* Usage (Pen), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x10, /* Report ID (16), */
0x09, 0x20, /* Usage (Stylus), */
0xA0, /* Collection (Physical), */
0x09, 0x42, /* Usage (Tip Switch), */
0x09, 0x44, /* Usage (Barrel Switch), */
0x09, 0x46, /* Usage (Tablet Pick), */
0x15, 0x01, /* Logical Minimum (1), */
0x25, 0x03, /* Logical Maximum (3), */
0x75, 0x04, /* Report Size (4), */
0x95, 0x01, /* Report Count (1), */
0x80, /* Input, */
0x09, 0x32, /* Usage (In Range), */
0x14, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x75, 0x01, /* Report Size (1), */
0x95, 0x01, /* Report Count (1), */
0x81, 0x02, /* Input (Variable), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x03, /* Input (Constant, Variable), */
0x75, 0x10, /* Report Size (16), */
0x95, 0x01, /* Report Count (1), */
0x14, /* Logical Minimum (0), */
0xA4, /* Push, */
0x05, 0x01, /* Usage Page (Desktop), */
0x65, 0x13, /* Unit (Inch), */
0x55, 0xFD, /* Unit Exponent (-3), */
0x34, /* Physical Minimum (0), */
0x09, 0x30, /* Usage (X), */
0x46, 0x70, 0x17, /* Physical Maximum (6000), */
0x26, 0x00, 0x30, /* Logical Maximum (12288), */
0x81, 0x02, /* Input (Variable), */
0x09, 0x31, /* Usage (Y), */
0x46, 0x94, 0x11, /* Physical Maximum (4500), */
0x26, 0x00, 0x24, /* Logical Maximum (9216), */
0x81, 0x02, /* Input (Variable), */
0xB4, /* Pop, */
0x09, 0x30, /* Usage (Tip Pressure), */
0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
0x81, 0x02, /* Input (Variable), */
0xC0, /* End Collection, */
0xC0 /* End Collection */
};
/*
* See Media Tablet 10.6 inch description, device and HID report descriptors at
* http://sf.net/apps/mediawiki/digimend/?title=Waltop_Media_Tablet_10.6%22
*/
/* Size of the original report descriptor of Media Tablet 10.6 inch */
#define MEDIA_TABLET_10_6_INCH_RDESC_ORIG_SIZE 300
/* Fixed Media Tablet 10.6 inch descriptor */
static __u8 media_tablet_10_6_inch_rdesc_fixed[] = {
0x05, 0x0D, /* Usage Page (Digitizer), */
0x09, 0x02, /* Usage (Pen), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x10, /* Report ID (16), */
0x09, 0x20, /* Usage (Stylus), */
0xA0, /* Collection (Physical), */
0x09, 0x42, /* Usage (Tip Switch), */
0x09, 0x44, /* Usage (Barrel Switch), */
0x09, 0x46, /* Usage (Tablet Pick), */
0x15, 0x01, /* Logical Minimum (1), */
0x25, 0x03, /* Logical Maximum (3), */
0x75, 0x04, /* Report Size (4), */
0x95, 0x01, /* Report Count (1), */
0x80, /* Input, */
0x75, 0x01, /* Report Size (1), */
0x09, 0x32, /* Usage (In Range), */
0x14, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x95, 0x01, /* Report Count (1), */
0x81, 0x02, /* Input (Variable), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x03, /* Input (Constant, Variable), */
0x75, 0x10, /* Report Size (16), */
0x95, 0x01, /* Report Count (1), */
0x14, /* Logical Minimum (0), */
0xA4, /* Push, */
0x05, 0x01, /* Usage Page (Desktop), */
0x65, 0x13, /* Unit (Inch), */
0x55, 0xFD, /* Unit Exponent (-3), */
0x34, /* Physical Minimum (0), */
0x09, 0x30, /* Usage (X), */
0x46, 0x28, 0x23, /* Physical Maximum (9000), */
0x26, 0x50, 0x46, /* Logical Maximum (18000), */
0x81, 0x02, /* Input (Variable), */
0x09, 0x31, /* Usage (Y), */
0x46, 0x7C, 0x15, /* Physical Maximum (5500), */
0x26, 0xF8, 0x2A, /* Logical Maximum (11000), */
0x81, 0x02, /* Input (Variable), */
0xB4, /* Pop, */
0x09, 0x30, /* Usage (Tip Pressure), */
0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
0x81, 0x02, /* Input (Variable), */
0xC0, /* End Collection, */
0xC0, /* End Collection, */
0x05, 0x01, /* Usage Page (Desktop), */
0x09, 0x02, /* Usage (Mouse), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x01, /* Report ID (1), */
0x09, 0x01, /* Usage (Pointer), */
0xA0, /* Collection (Physical), */
0x75, 0x08, /* Report Size (8), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x03, /* Input (Constant, Variable), */
0x95, 0x02, /* Report Count (2), */
0x15, 0xFF, /* Logical Minimum (-1), */
0x25, 0x01, /* Logical Maximum (1), */
0x09, 0x38, /* Usage (Wheel), */
0x0B, 0x38, 0x02, /* Usage (Consumer AC Pan), */
0x0C, 0x00,
0x81, 0x06, /* Input (Variable, Relative), */
0x95, 0x02, /* Report Count (2), */
0x81, 0x03, /* Input (Constant, Variable), */
0xC0, /* End Collection, */
0xC0, /* End Collection, */
0x05, 0x0C, /* Usage Page (Consumer), */
0x09, 0x01, /* Usage (Consumer Control), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x0D, /* Report ID (13), */
0x95, 0x01, /* Report Count (1), */
0x75, 0x10, /* Report Size (16), */
0x81, 0x03, /* Input (Constant, Variable), */
0x0A, 0x2F, 0x02, /* Usage (AC Zoom), */
0x0A, 0x2E, 0x02, /* Usage (AC Zoom Out), */
0x0A, 0x2D, 0x02, /* Usage (AC Zoom In), */
0x09, 0xB6, /* Usage (Scan Previous Track), */
0x09, 0xB5, /* Usage (Scan Next Track), */
0x08, /* Usage (00h), */
0x08, /* Usage (00h), */
0x08, /* Usage (00h), */
0x08, /* Usage (00h), */
0x08, /* Usage (00h), */
0x0A, 0x2E, 0x02, /* Usage (AC Zoom Out), */
0x0A, 0x2D, 0x02, /* Usage (AC Zoom In), */
0x15, 0x0C, /* Logical Minimum (12), */
0x25, 0x17, /* Logical Maximum (23), */
0x75, 0x05, /* Report Size (5), */
0x80, /* Input, */
0x75, 0x03, /* Report Size (3), */
0x81, 0x03, /* Input (Constant, Variable), */
0x75, 0x20, /* Report Size (32), */
0x81, 0x03, /* Input (Constant, Variable), */
0xC0, /* End Collection, */
0x09, 0x01, /* Usage (Consumer Control), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x0C, /* Report ID (12), */
0x75, 0x01, /* Report Size (1), */
0x09, 0xE9, /* Usage (Volume Inc), */
0x09, 0xEA, /* Usage (Volume Dec), */
0x09, 0xE2, /* Usage (Mute), */
0x14, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x06, /* Input (Variable, Relative), */
0x95, 0x35, /* Report Count (53), */
0x81, 0x03, /* Input (Constant, Variable), */
0xC0 /* End Collection */
};
/*
* See Media Tablet 14.1 inch description, device and HID report descriptors at
* http://sf.net/apps/mediawiki/digimend/?title=Waltop_Media_Tablet_14.1%22
*/
/* Size of the original report descriptor of Media Tablet 14.1 inch */
#define MEDIA_TABLET_14_1_INCH_RDESC_ORIG_SIZE 309
/* Fixed Media Tablet 14.1 inch descriptor */
static __u8 media_tablet_14_1_inch_rdesc_fixed[] = {
0x05, 0x0D, /* Usage Page (Digitizer), */
0x09, 0x02, /* Usage (Pen), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x10, /* Report ID (16), */
0x09, 0x20, /* Usage (Stylus), */
0xA0, /* Collection (Physical), */
0x09, 0x42, /* Usage (Tip Switch), */
0x09, 0x44, /* Usage (Barrel Switch), */
0x09, 0x46, /* Usage (Tablet Pick), */
0x15, 0x01, /* Logical Minimum (1), */
0x25, 0x03, /* Logical Maximum (3), */
0x75, 0x04, /* Report Size (4), */
0x95, 0x01, /* Report Count (1), */
0x80, /* Input, */
0x75, 0x01, /* Report Size (1), */
0x09, 0x32, /* Usage (In Range), */
0x14, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x95, 0x01, /* Report Count (1), */
0x81, 0x02, /* Input (Variable), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x03, /* Input (Constant, Variable), */
0x75, 0x10, /* Report Size (16), */
0x95, 0x01, /* Report Count (1), */
0x14, /* Logical Minimum (0), */
0xA4, /* Push, */
0x05, 0x01, /* Usage Page (Desktop), */
0x65, 0x13, /* Unit (Inch), */
0x55, 0xFD, /* Unit Exponent (-3), */
0x34, /* Physical Minimum (0), */
0x09, 0x30, /* Usage (X), */
0x46, 0xE0, 0x2E, /* Physical Maximum (12000), */
0x26, 0xFF, 0x3F, /* Logical Maximum (16383), */
0x81, 0x02, /* Input (Variable), */
0x09, 0x31, /* Usage (Y), */
0x46, 0x52, 0x1C, /* Physical Maximum (7250), */
0x26, 0xFF, 0x3F, /* Logical Maximum (16383), */
0x81, 0x02, /* Input (Variable), */
0xB4, /* Pop, */
0x09, 0x30, /* Usage (Tip Pressure), */
0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
0x81, 0x02, /* Input (Variable), */
0xC0, /* End Collection, */
0xC0, /* End Collection, */
0x05, 0x01, /* Usage Page (Desktop), */
0x09, 0x02, /* Usage (Mouse), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x01, /* Report ID (1), */
0x09, 0x01, /* Usage (Pointer), */
0xA0, /* Collection (Physical), */
0x75, 0x08, /* Report Size (8), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x03, /* Input (Constant, Variable), */
0x95, 0x02, /* Report Count (2), */
0x15, 0xFF, /* Logical Minimum (-1), */
0x25, 0x01, /* Logical Maximum (1), */
0x09, 0x38, /* Usage (Wheel), */
0x0B, 0x38, 0x02, /* Usage (Consumer AC Pan), */
0x0C, 0x00,
0x81, 0x06, /* Input (Variable, Relative), */
0xC0, /* End Collection, */
0xC0, /* End Collection, */
0x05, 0x0C, /* Usage Page (Consumer), */
0x09, 0x01, /* Usage (Consumer Control), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x0D, /* Report ID (13), */
0x95, 0x01, /* Report Count (1), */
0x75, 0x10, /* Report Size (16), */
0x81, 0x03, /* Input (Constant, Variable), */
0x0A, 0x2F, 0x02, /* Usage (AC Zoom), */
0x0A, 0x2E, 0x02, /* Usage (AC Zoom Out), */
0x0A, 0x2D, 0x02, /* Usage (AC Zoom In), */
0x09, 0xB6, /* Usage (Scan Previous Track), */
0x09, 0xB5, /* Usage (Scan Next Track), */
0x08, /* Usage (00h), */
0x08, /* Usage (00h), */
0x08, /* Usage (00h), */
0x08, /* Usage (00h), */
0x08, /* Usage (00h), */
0x0A, 0x2E, 0x02, /* Usage (AC Zoom Out), */
0x0A, 0x2D, 0x02, /* Usage (AC Zoom In), */
0x15, 0x0C, /* Logical Minimum (12), */
0x25, 0x17, /* Logical Maximum (23), */
0x75, 0x05, /* Report Size (5), */
0x80, /* Input, */
0x75, 0x03, /* Report Size (3), */
0x81, 0x03, /* Input (Constant, Variable), */
0x75, 0x20, /* Report Size (32), */
0x81, 0x03, /* Input (Constant, Variable), */
0xC0, /* End Collection, */
0x09, 0x01, /* Usage (Consumer Control), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x0C, /* Report ID (12), */
0x75, 0x01, /* Report Size (1), */
0x09, 0xE9, /* Usage (Volume Inc), */
0x09, 0xEA, /* Usage (Volume Dec), */
0x09, 0xE2, /* Usage (Mute), */
0x14, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x06, /* Input (Variable, Relative), */
0x75, 0x05, /* Report Size (5), */
0x81, 0x03, /* Input (Constant, Variable), */
0xC0 /* End Collection */
};
static __u8 *waltop_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
switch (hdev->product) {
case USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH:
if (*rsize == SLIM_TABLET_5_8_INCH_RDESC_ORIG_SIZE) {
rdesc = slim_tablet_5_8_inch_rdesc_fixed;
*rsize = sizeof(slim_tablet_5_8_inch_rdesc_fixed);
}
break;
case USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH:
if (*rsize == SLIM_TABLET_12_1_INCH_RDESC_ORIG_SIZE) {
rdesc = slim_tablet_12_1_inch_rdesc_fixed;
*rsize = sizeof(slim_tablet_12_1_inch_rdesc_fixed);
}
break;
case USB_DEVICE_ID_WALTOP_Q_PAD:
if (*rsize == Q_PAD_RDESC_ORIG_SIZE) {
rdesc = q_pad_rdesc_fixed;
*rsize = sizeof(q_pad_rdesc_fixed);
}
break;
case USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH:
if (*rsize == MEDIA_TABLET_10_6_INCH_RDESC_ORIG_SIZE) {
rdesc = media_tablet_10_6_inch_rdesc_fixed;
*rsize = sizeof(media_tablet_10_6_inch_rdesc_fixed);
}
break;
case USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH:
if (*rsize == MEDIA_TABLET_14_1_INCH_RDESC_ORIG_SIZE) {
rdesc = media_tablet_14_1_inch_rdesc_fixed;
*rsize = sizeof(media_tablet_14_1_inch_rdesc_fixed);
}
break;
}
return rdesc;
}
static const struct hid_device_id waltop_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH) },
{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
USB_DEVICE_ID_WALTOP_Q_PAD) },
{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH) },
{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH) },
{ }
};
MODULE_DEVICE_TABLE(hid, waltop_devices);
static struct hid_driver waltop_driver = {
.name = "waltop",
.id_table = waltop_devices,
.report_fixup = waltop_report_fixup,
};
static int __init waltop_init(void)
{
return hid_register_driver(&waltop_driver);
}
static void __exit waltop_exit(void)
{
hid_unregister_driver(&waltop_driver);
}
module_init(waltop_init);
module_exit(waltop_exit);
MODULE_LICENSE("GPL");
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