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linux/drivers/hid/hid-waltop.c
Nikolai Kondrashov 4b5b4575ce HID: waltop: fix Media Tablet 10.6 inch scrolling 
Add support for horizontal scrolling with Waltop Media Tablet 10.6 inch by
updating the fixed HID report descriptor.

The horizontal/vertical scrolling is toggled by pressing the wheels' center
buttons while in scroll mode, which wasn't discovered at the time the
support for this tablet was added.

Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-09-01 12:36:35 +02:00

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/*
* 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"
/*
* Original Slim Tablet 5.8 inch report descriptor.
*
* All the reports except the report with ID 16 (the stylus) are unused,
* possibly because the tablet is not configured to, or because they were
* just copied from a more capable model. The purpose of features described
* for report ID 2 is unknown.
*
* The stylus buttons are described as three bit fields, whereas actually
* it's an "array", i.e. they're reported as button numbers (1, 2 and 3).
* The "eraser" field is not used. There is also a "push" without a "pop" in
* the stylus description.
*
* Usage Page (Desktop), ; Generic desktop controls (01h)
* Usage (Mouse), ; Mouse (02h, application collection)
* Collection (Application),
* Report ID (1),
* Usage (Pointer), ; Pointer (01h, physical collection)
* Collection (Physical),
* Usage Page (Button), ; Button (09h)
* Usage Minimum (01h),
* Usage Maximum (05h),
* Logical Minimum (0),
* Logical Maximum (1),
* Report Size (1),
* Report Count (5),
* Input (Variable),
* Report Size (3),
* Report Count (1),
* Input (Constant, Variable),
* Usage Page (Desktop), ; Generic desktop controls (01h)
* Usage (X), ; X (30h, dynamic value)
* Usage (Y), ; Y (31h, dynamic value)
* Usage (Wheel), ; Wheel (38h, dynamic value)
* Logical Minimum (-127),
* Logical Maximum (127),
* Report Size (8),
* Report Count (3),
* Input (Variable, Relative),
* End Collection,
* End Collection,
* Usage Page (Digitizer), ; Digitizer (0Dh)
* Usage (Pen), ; Pen (02h, application collection)
* Collection (Application),
* Report ID (2),
* Usage (Stylus), ; Stylus (20h, logical collection)
* Collection (Physical),
* Usage (00h),
* Logical Minimum (0),
* Logical Maximum (255),
* Report Size (8),
* Report Count (7),
* Input (Variable),
* Usage (Azimuth), ; Azimuth (3Fh, dynamic value)
* Usage (Altitude), ; Altitude (40h, dynamic value)
* Logical Minimum (0),
* Logical Maximum (255),
* Report Size (8),
* Report Count (2),
* Feature (Variable),
* End Collection,
* Report ID (5),
* Usage Page (Digitizer), ; Digitizer (0Dh)
* Usage (Stylus), ; Stylus (20h, logical collection)
* Collection (Physical),
* Usage (00h),
* Logical Minimum (0),
* Logical Maximum (255),
* Report Size (8),
* Report Count (7),
* Input (Variable),
* End Collection,
* Report ID (10),
* Usage Page (Digitizer), ; Digitizer (0Dh)
* Usage (Stylus), ; Stylus (20h, logical collection)
* Collection (Physical),
* Usage (00h),
* Logical Minimum (0),
* Logical Maximum (255),
* Report Size (8),
* Report Count (3),
* Input (Variable),
* End Collection,
* Report ID (16),
* Usage (Stylus), ; Stylus (20h, logical collection)
* Collection (Physical),
* Usage (Tip Switch), ; Tip switch (42h, momentary control)
* Usage (Barrel Switch), ; Barrel switch (44h, momentary control)
* Usage (Invert), ; Invert (3Ch, momentary control)
* Usage (Eraser), ; Eraser (45h, momentary control)
* Usage (In Range), ; In range (32h, momentary control)
* Logical Minimum (0),
* Logical Maximum (1),
* Report Size (1),
* Report Count (5),
* Input (Variable),
* Report Count (3),
* Input (Constant, Variable),
* Usage Page (Desktop), ; Generic desktop controls (01h)
* Usage (X), ; X (30h, dynamic value)
* Report Size (16),
* Report Count (1),
* Push,
* Unit Exponent (13),
* Unit (Inch^3),
* Logical Minimum (0),
* Logical Maximum (10000),
* Physical Minimum (0),
* Physical Maximum (10000),
* Input (Variable),
* Usage (Y), ; Y (31h, dynamic value)
* Logical Maximum (6000),
* Physical Maximum (6000),
* Input (Variable),
* Usage Page (Digitizer), ; Digitizer (0Dh)
* Usage (Tip Pressure), ; Tip pressure (30h, dynamic value)
* Logical Minimum (0),
* Logical Maximum (1023),
* Physical Minimum (0),
* Physical Maximum (1023),
* Input (Variable),
* End Collection,
* End Collection
*/
/* 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.
*
* All the reports except the stylus report (ID 16) were removed as unused.
* The stylus buttons description was fixed.
*/
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 */
};
/*
* Original Media Tablet 10.6 inch report descriptor.
*
* There are at least two versions of this model in the wild. They are
* represented by Genius G-Pen M609 (older version) and Genius G-Pen M609X
* (newer version).
*
* Both versions have the usual pen with two barrel buttons and two
* identical wheels with center buttons in the top corners of the tablet
* base. They also have buttons on the top, between the wheels, for
* selecting the wheels' functions and wide/standard mode. In the wide mode
* the whole working surface is sensed, in the standard mode a narrower area
* is sensed, but the logical report extents remain the same. These modes
* correspond roughly to 16:9 and 4:3 aspect ratios respectively.
*
* The older version has three wheel function buttons ("scroll", "zoom" and
* "volume") and two separate buttons for wide and standard mode. The newer
* version has four wheel function buttons (plus "brush") and only one
* button is used for selecting wide/standard mode. So, the total number of
* buttons remains the same, but one of the mode buttons is repurposed as a
* wheels' function button in the newer version.
*
* The wheel functions are:
* scroll - the wheels act as scroll wheels, the center buttons switch
* between vertical and horizontal scrolling;
* zoom - the wheels zoom in/out, the buttons supposedly reset to 100%;
* volume - the wheels control the sound volume, the buttons mute;
* brush - the wheels are supposed to control brush width in a graphics
* editor, the buttons do nothing.
*
* Below is the newer version's report descriptor. It may very well be that
* the older version's descriptor is different and thus it won't be
* supported.
*
* The mouse report (ID 1) only uses the wheel field for reporting the tablet
* wheels' scroll mode. The keyboard report (ID 13) is used to report the
* wheels' zoom and brush control functions as key presses. The report ID 12
* is used to report the wheels' volume control functions. The stylus report
* (ID 16) has the same problems as the Slim Tablet 5.8 inch report has.
*
* The rest of the reports are unused, at least in the default configuration.
* The purpose of the features is unknown.
*
* Usage Page (Desktop),
* Usage (Mouse),
* Collection (Application),
* Report ID (1),
* Usage (Pointer),
* Collection (Physical),
* Usage Page (Button),
* Usage Minimum (01h),
* Usage Maximum (05h),
* Logical Minimum (0),
* Logical Maximum (1),
* Report Size (1),
* Report Count (5),
* Input (Variable),
* Report Size (3),
* Report Count (1),
* Input (Constant, Variable),
* Usage Page (Desktop),
* Usage (X),
* Usage (Y),
* Usage (Wheel),
* Logical Minimum (-127),
* Logical Maximum (127),
* Report Size (8),
* Report Count (3),
* Input (Variable, Relative),
* End Collection,
* End Collection,
* Usage Page (Digitizer),
* Usage (Pen),
* Collection (Application),
* Report ID (2),
* Usage (Stylus),
* Collection (Physical),
* Usage (00h),
* Logical Minimum (0),
* Logical Maximum (255),
* Report Size (8),
* Report Count (7),
* Input (Variable),
* Usage (Azimuth),
* Usage (Altitude),
* Logical Minimum (0),
* Logical Maximum (255),
* Report Size (8),
* Report Count (2),
* Feature (Variable),
* End Collection,
* Report ID (5),
* Usage Page (Digitizer),
* Usage (Stylus),
* Collection (Physical),
* Usage (00h),
* Logical Minimum (0),
* Logical Maximum (255),
* Report Size (8),
* Report Count (7),
* Input (Variable),
* End Collection,
* Report ID (10),
* Usage Page (Digitizer),
* Usage (Stylus),
* Collection (Physical),
* Usage (00h),
* Logical Minimum (0),
* Logical Maximum (255),
* Report Size (8),
* Report Count (7),
* Input (Variable),
* End Collection,
* Report ID (16),
* Usage (Stylus),
* Collection (Physical),
* Usage (Tip Switch),
* Usage (Barrel Switch),
* Usage (Invert),
* Usage (Eraser),
* Usage (In Range),
* Logical Minimum (0),
* Logical Maximum (1),
* Report Size (1),
* Report Count (5),
* Input (Variable),
* Report Count (3),
* Input (Constant, Variable),
* Usage Page (Desktop),
* Usage (X),
* Report Size (16),
* Report Count (1),
* Push,
* Unit Exponent (13),
* Unit (Inch^3),
* Logical Minimum (0),
* Logical Maximum (18000),
* Physical Minimum (0),
* Physical Maximum (18000),
* Input (Variable),
* Usage (Y),
* Logical Maximum (11000),
* Physical Maximum (11000),
* Input (Variable),
* Usage Page (Digitizer),
* Usage (Tip Pressure),
* Logical Minimum (0),
* Logical Maximum (1023),
* Physical Minimum (0),
* Physical Maximum (1023),
* Input (Variable),
* End Collection,
* End Collection,
* Usage Page (Desktop),
* Usage (Keyboard),
* Collection (Application),
* Report ID (13),
* Usage Page (Keyboard),
* Usage Minimum (KB Leftcontrol),
* Usage Maximum (KB Right GUI),
* Logical Minimum (0),
* Logical Maximum (1),
* Report Size (1),
* Report Count (8),
* Input (Variable),
* Report Size (8),
* Report Count (1),
* Input (Constant),
* Usage Page (Keyboard),
* Usage Minimum (None),
* Usage Maximum (KB Application),
* Logical Minimum (0),
* Logical Maximum (101),
* Report Size (8),
* Report Count (5),
* Input,
* End Collection,
* Usage Page (Consumer),
* Usage (Consumer Control),
* Collection (Application),
* Report ID (12),
* Usage (Volume Inc),
* Usage (Volume Dec),
* Usage (Mute),
* Logical Minimum (0),
* Logical Maximum (1),
* Report Size (1),
* Report Count (3),
* Input (Variable, Relative),
* Report Size (5),
* Report Count (1),
* Input (Constant, Variable, Relative),
* End Collection
*/
/* 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.
*
* The descriptions of reports unused in the default configuration are
* removed. The stylus report (ID 16) is fixed similarly to Slim Tablet 5.8
* inch. The unused mouse report (ID 1) fields are replaced with constant
* padding.
*
* The keyboard report (ID 13) is hacked to instead have an "array" field
* reporting consumer page controls, and all the unused bits are masked out
* with constant padding. The "brush" wheels' function is represented as "Scan
* Previous/Next Track" controls due to the lack of brush controls in the
* usage tables specification.
*/
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), */
0x15, 0x2C, /* Logical Minimum (44), */
0x25, 0x30, /* Logical Maximum (48), */
0x75, 0x08, /* Report Size (8), */
0x80, /* Input, */
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 */
};
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_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;
}
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_MEDIA_TABLET_10_6_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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