// SPDX-License-Identifier: GPL-2.0+
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/*
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* HID driver for ViewSonic devices not fully compliant with HID standard
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*
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* Copyright (c) 2017 Nikolai Kondrashov
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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/* Size of the original descriptor of PD1011 signature pad */
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#define PD1011_RDESC_ORIG_SIZE 408
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/* Fixed report descriptor of PD1011 signature pad */
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static __u8 pd1011_rdesc_fixed[] = {
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0x05, 0x0D, /* Usage Page (Digitizer), */
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0x09, 0x02, /* Usage (Pen), */
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0xA1, 0x01, /* Collection (Application), */
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0x85, 0x02, /* Report ID (2), */
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0x09, 0x20, /* Usage (Stylus), */
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0xA0, /* Collection (Physical), */
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0x75, 0x10, /* Report Size (16), */
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0x95, 0x01, /* Report Count (1), */
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0xA4, /* Push, */
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0x05, 0x01, /* Usage Page (Desktop), */
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0x65, 0x13, /* Unit (Inch), */
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0x55, 0xFD, /* Unit Exponent (-3), */
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0x34, /* Physical Minimum (0), */
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0x09, 0x30, /* Usage (X), */
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0x46, 0x5D, 0x21, /* Physical Maximum (8541), */
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0x27, 0x80, 0xA9,
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0x00, 0x00, /* Logical Maximum (43392), */
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0x81, 0x02, /* Input (Variable), */
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0x09, 0x31, /* Usage (Y), */
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0x46, 0xDA, 0x14, /* Physical Maximum (5338), */
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0x26, 0xF0, 0x69, /* Logical Maximum (27120), */
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0x81, 0x02, /* Input (Variable), */
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0xB4, /* Pop, */
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0x14, /* Logical Minimum (0), */
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0x25, 0x01, /* Logical Maximum (1), */
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0x75, 0x01, /* Report Size (1), */
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0x95, 0x01, /* Report Count (1), */
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0x81, 0x03, /* Input (Constant, Variable), */
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0x09, 0x32, /* Usage (In Range), */
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0x09, 0x42, /* Usage (Tip Switch), */
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0x95, 0x02, /* Report Count (2), */
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0x81, 0x02, /* Input (Variable), */
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0x95, 0x05, /* Report Count (5), */
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0x81, 0x03, /* Input (Constant, Variable), */
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0x75, 0x10, /* Report Size (16), */
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0x95, 0x01, /* Report Count (1), */
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0x09, 0x30, /* Usage (Tip Pressure), */
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0x15, 0x05, /* Logical Minimum (5), */
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0x26, 0xFF, 0x07, /* Logical Maximum (2047), */
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0x81, 0x02, /* Input (Variable), */
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0x75, 0x10, /* Report Size (16), */
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0x95, 0x01, /* Report Count (1), */
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0x81, 0x03, /* Input (Constant, Variable), */
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0xC0, /* End Collection, */
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0xC0 /* End Collection */
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};
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static __u8 *viewsonic_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int *rsize)
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{
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switch (hdev->product) {
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case USB_DEVICE_ID_VIEWSONIC_PD1011:
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case USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011:
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if (*rsize == PD1011_RDESC_ORIG_SIZE) {
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rdesc = pd1011_rdesc_fixed;
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*rsize = sizeof(pd1011_rdesc_fixed);
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}
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break;
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}
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return rdesc;
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}
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static const struct hid_device_id viewsonic_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_VIEWSONIC,
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USB_DEVICE_ID_VIEWSONIC_PD1011) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_SIGNOTEC,
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USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, viewsonic_devices);
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static struct hid_driver viewsonic_driver = {
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.name = "viewsonic",
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.id_table = viewsonic_devices,
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.report_fixup = viewsonic_report_fixup,
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};
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module_hid_driver(viewsonic_driver);
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MODULE_LICENSE("GPL");
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