Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 745 insertions, 0 deletions

diff --git a/drivers/hid/hid-waltop.c b/drivers/hid/hid-waltop.c
new file mode 100644
index 0000000000..bc355b1a5b
--- /dev/null
+++ b/drivers/hid/hid-waltop.c
@@ -0,0 +1,745 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  HID driver for Waltop devices not fully compliant with HID standard
+ *
+ *  Copyright (c) 2010 Nikolai Kondrashov
+ */
+
+/*
+ */
+
+#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
+ */
+
+/* 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                      */
+};
+
+/* 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                      */
+};
+
+/* 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                      */
+};
+
+/* Size of the original report descriptor of tablet with PID 0038 */
+#define PID_0038_RDESC_ORIG_SIZE	241
+
+/*
+ * Fixed report descriptor for tablet with PID 0038.
+ */
+static __u8 pid_0038_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, 0x2E, 0x22,   /*          Physical Maximum (8750),    */
+	0x26, 0x00, 0x46,   /*          Logical Maximum (17920),    */
+	0x81, 0x02,         /*          Input (Variable),           */
+	0x09, 0x31,         /*          Usage (Y),                  */
+	0x46, 0x82, 0x14,   /*          Physical Maximum (5250),    */
+	0x26, 0x00, 0x2A,   /*          Logical Maximum (10752),    */
+	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                      */
+};
+
+/* 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                      */
+};
+
+/* 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                      */
+};
+
+/* Size of the original report descriptor of Sirius Battery Free Tablet */
+#define SIRIUS_BATTERY_FREE_TABLET_RDESC_ORIG_SIZE	335
+
+/* Fixed Sirius Battery Free Tablet descriptor */
+static __u8 sirius_battery_free_tablet_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),          */
+	0x95, 0x01,         /*          Report Count (1),           */
+	0x15, 0x01,         /*          Logical Minimum (1),        */
+	0x25, 0x03,         /*          Logical Maximum (3),        */
+	0x75, 0x02,         /*          Report Size (2),            */
+	0x09, 0x42,         /*          Usage (Tip Switch),         */
+	0x09, 0x44,         /*          Usage (Barrel Switch),      */
+	0x09, 0x46,         /*          Usage (Tablet Pick),        */
+	0x80,               /*          Input,                      */
+	0x14,               /*          Logical Minimum (0),        */
+	0x25, 0x01,         /*          Logical Maximum (1),        */
+	0x75, 0x01,         /*          Report Size (1),            */
+	0x09, 0x3C,         /*          Usage (Invert),             */
+	0x81, 0x02,         /*          Input (Variable),           */
+	0x81, 0x03,         /*          Input (Constant, Variable), */
+	0x09, 0x32,         /*          Usage (In Range),           */
+	0x81, 0x02,         /*          Input (Variable),           */
+	0x95, 0x03,         /*          Report Count (3),           */
+	0x81, 0x03,         /*          Input (Constant, Variable), */
+	0xA4,               /*          Push,                       */
+	0x05, 0x01,         /*          Usage Page (Desktop),       */
+	0x55, 0xFD,         /*          Unit Exponent (-3),         */
+	0x65, 0x13,         /*          Unit (Inch),                */
+	0x34,               /*          Physical Minimum (0),       */
+	0x14,               /*          Logical Minimum (0),        */
+	0x75, 0x10,         /*          Report Size (16),           */
+	0x95, 0x01,         /*          Report Count (1),           */
+	0x46, 0x10, 0x27,   /*          Physical Maximum (10000),   */
+	0x26, 0x20, 0x4E,   /*          Logical Maximum (20000),    */
+	0x09, 0x30,         /*          Usage (X),                  */
+	0x81, 0x02,         /*          Input (Variable),           */
+	0x46, 0x70, 0x17,   /*          Physical Maximum (6000),    */
+	0x26, 0xE0, 0x2E,   /*          Logical Maximum (12000),    */
+	0x09, 0x31,         /*          Usage (Y),                  */
+	0x81, 0x02,         /*          Input (Variable),           */
+	0xB4,               /*          Pop,                        */
+	0x75, 0x10,         /*          Report Size (16),           */
+	0x95, 0x01,         /*          Report Count (1),           */
+	0x14,               /*          Logical Minimum (0),        */
+	0x26, 0xFF, 0x03,   /*          Logical Maximum (1023),     */
+	0x09, 0x30,         /*          Usage (Tip Pressure),       */
+	0x81, 0x02,         /*          Input (Variable),           */
+	0xA4,               /*          Push,                       */
+	0x55, 0xFE,         /*          Unit Exponent (-2),         */
+	0x65, 0x12,         /*          Unit (Radians),             */
+	0x35, 0x97,         /*          Physical Minimum (-105),    */
+	0x45, 0x69,         /*          Physical Maximum (105),     */
+	0x15, 0x97,         /*          Logical Minimum (-105),     */
+	0x25, 0x69,         /*          Logical Maximum (105),      */
+	0x75, 0x08,         /*          Report Size (8),            */
+	0x95, 0x02,         /*          Report Count (2),           */
+	0x09, 0x3D,         /*          Usage (X Tilt),             */
+	0x09, 0x3E,         /*          Usage (Y Tilt),             */
+	0x81, 0x02,         /*          Input (Variable),           */
+	0xB4,               /*          Pop,                        */
+	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), */
+	0x09, 0x38,         /*          Usage (Wheel),              */
+	0x15, 0xFF,         /*          Logical Minimum (-1),       */
+	0x25, 0x01,         /*          Logical Maximum (1),        */
+	0x75, 0x08,         /*          Report Size (8),            */
+	0x95, 0x01,         /*          Report Count (1),           */
+	0x81, 0x06,         /*          Input (Variable, Relative), */
+	0x75, 0x08,         /*          Report Size (8),            */
+	0x95, 0x03,         /*          Report Count (3),           */
+	0x81, 0x03,         /*          Input (Constant, Variable), */
+	0xC0,               /*      End Collection,                 */
+	0xC0,               /*  End Collection,                     */
+	0x05, 0x01,         /*  Usage Page (Desktop),               */
+	0x09, 0x06,         /*  Usage (Keyboard),                   */
+	0xA1, 0x01,         /*  Collection (Application),           */
+	0x85, 0x0D,         /*      Report ID (13),                 */
+	0x05, 0x07,         /*      Usage Page (Keyboard),          */
+	0x19, 0xE0,         /*      Usage Minimum (KB Leftcontrol), */
+	0x29, 0xE7,         /*      Usage Maximum (KB Right GUI),   */
+	0x14,               /*      Logical Minimum (0),            */
+	0x25, 0x01,         /*      Logical Maximum (1),            */
+	0x75, 0x01,         /*      Report Size (1),                */
+	0x95, 0x08,         /*      Report Count (8),               */
+	0x81, 0x02,         /*      Input (Variable),               */
+	0x75, 0x08,         /*      Report Size (8),                */
+	0x95, 0x01,         /*      Report Count (1),               */
+	0x81, 0x01,         /*      Input (Constant),               */
+	0x18,               /*      Usage Minimum (None),           */
+	0x29, 0x65,         /*      Usage Maximum (KB Application), */
+	0x14,               /*      Logical Minimum (0),            */
+	0x25, 0x65,         /*      Logical Maximum (101),          */
+	0x75, 0x08,         /*      Report Size (8),                */
+	0x95, 0x05,         /*      Report Count (5),               */
+	0x80,               /*      Input,                          */
+	0xC0,               /*  End Collection,                     */
+	0x05, 0x0C,         /*  Usage Page (Consumer),              */
+	0x09, 0x01,         /*  Usage (Consumer Control),           */
+	0xA1, 0x01,         /*  Collection (Application),           */
+	0x85, 0x0C,         /*      Report ID (12),                 */
+	0x09, 0xE9,         /*      Usage (Volume Inc),             */
+	0x09, 0xEA,         /*      Usage (Volume Dec),             */
+	0x14,               /*      Logical Minimum (0),            */
+	0x25, 0x01,         /*      Logical Maximum (1),            */
+	0x75, 0x01,         /*      Report Size (1),                */
+	0x95, 0x02,         /*      Report Count (2),               */
+	0x81, 0x02,         /*      Input (Variable),               */
+	0x75, 0x06,         /*      Report Size (6),                */
+	0x95, 0x01,         /*      Report Count (1),               */
+	0x81, 0x03,         /*      Input (Constant, Variable),     */
+	0x75, 0x10,         /*      Report Size (16),               */
+	0x95, 0x03,         /*      Report Count (3),               */
+	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_PID_0038:
+		if (*rsize == PID_0038_RDESC_ORIG_SIZE) {
+			rdesc = pid_0038_rdesc_fixed;
+			*rsize = sizeof(pid_0038_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;
+	case USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET:
+		if (*rsize == SIRIUS_BATTERY_FREE_TABLET_RDESC_ORIG_SIZE) {
+			rdesc = sirius_battery_free_tablet_rdesc_fixed;
+			*rsize = sizeof(sirius_battery_free_tablet_rdesc_fixed);
+		}
+		break;
+	}
+	return rdesc;
+}
+
+static int waltop_raw_event(struct hid_device *hdev, struct hid_report *report,
+		     u8 *data, int size)
+{
+	/* If this is a pen input report */
+	if (report->type == HID_INPUT_REPORT && report->id == 16 && size >= 8) {
+		/*
+		 * Ignore reported pressure when a barrel button is pressed,
+		 * because it is rarely correct.
+		 */
+
+		/* If a barrel button is pressed */
+		if ((data[1] & 0xF) > 1) {
+			/* Report zero pressure */
+			data[6] = 0;
+			data[7] = 0;
+		}
+	}
+
+	/* If this is a pen input report of Sirius Battery Free Tablet */
+	if (hdev->product == USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET &&
+	    report->type == HID_INPUT_REPORT &&
+	    report->id == 16 &&
+	    size == 10) {
+		/*
+		 * The tablet reports tilt as roughly sin(a)*21 (18 means 60
+		 * degrees).
+		 *
+		 * This array stores angles as radians * 100, corresponding to
+		 * reported values up to 60 degrees, as expected by userspace.
+		 */
+		static const s8 tilt_to_radians[] = {
+			0, 5, 10, 14, 19, 24, 29, 34, 40, 45,
+			50, 56, 62, 68, 74, 81, 88, 96, 105
+		};
+
+		s8 tilt_x = (s8)data[8];
+		s8 tilt_y = (s8)data[9];
+		s8 sign_x = tilt_x >= 0 ? 1 : -1;
+		s8 sign_y = tilt_y >= 0 ? 1 : -1;
+
+		tilt_x *= sign_x;
+		tilt_y *= sign_y;
+
+		/*
+		 * Reverse the Y Tilt direction to match the HID standard and
+		 * userspace expectations. See HID Usage Tables v1.12 16.3.2
+		 * Tilt Orientation.
+		 */
+		sign_y *= -1;
+
+		/*
+		 * This effectively clamps reported tilt to 60 degrees - the
+		 * range expected by userspace
+		 */
+		if (tilt_x > ARRAY_SIZE(tilt_to_radians) - 1)
+			tilt_x = ARRAY_SIZE(tilt_to_radians) - 1;
+		if (tilt_y > ARRAY_SIZE(tilt_to_radians) - 1)
+			tilt_y = ARRAY_SIZE(tilt_to_radians) - 1;
+
+		data[8] = tilt_to_radians[tilt_x] * sign_x;
+		data[9] = tilt_to_radians[tilt_y] * sign_y;
+	}
+
+	return 0;
+}
+
+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_PID_0038) },
+	{ 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) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
+			 USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, waltop_devices);
+
+static struct hid_driver waltop_driver = {
+	.name = "waltop",
+	.id_table = waltop_devices,
+	.report_fixup = waltop_report_fixup,
+	.raw_event = waltop_raw_event,
+};
+module_hid_driver(waltop_driver);
+
+MODULE_LICENSE("GPL");