--- /dev/null
+/*
+ * 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 do nothing.
+ * 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), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x75, 0x18, /* Report Size (24), */
+ 0x81, 0x03, /* Input (Constant, Variable), */
+ 0x05, 0x01, /* Usage Page (Desktop), */
+ 0x09, 0x38, /* Usage (Wheel), */
+ 0x15, 0xFF, /* Logical Minimum (-1), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0x75, 0x08, /* Report Size (8), */
+ 0x81, 0x06, /* Input (Variable, Relative), */
+ 0x75, 0x18, /* Report Size (24), */
+ 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");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff