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1// SPDX-License-Identifier: GPL-2.0+2/*3 * HID driver for ViewSonic devices not fully compliant with HID standard4 *5 * Copyright (c) 2017 Nikolai Kondrashov6 */7 8/*9 * This program is free software; you can redistribute it and/or modify it10 * under the terms of the GNU General Public License as published by the Free11 * Software Foundation; either version 2 of the License, or (at your option)12 * any later version.13 */14 15#include <linux/device.h>16#include <linux/hid.h>17#include <linux/module.h>18 19#include "hid-ids.h"20 21/* Size of the original descriptor of PD1011 signature pad */22#define PD1011_RDESC_ORIG_SIZE 40823 24/* Fixed report descriptor of PD1011 signature pad */25static const __u8 pd1011_rdesc_fixed[] = {26 0x05, 0x0D, /* Usage Page (Digitizer), */27 0x09, 0x01, /* Usage (Digitizer), */28 0xA1, 0x01, /* Collection (Application), */29 0x85, 0x02, /* Report ID (2), */30 0x09, 0x20, /* Usage (Stylus), */31 0xA0, /* Collection (Physical), */32 0x75, 0x10, /* Report Size (16), */33 0x95, 0x01, /* Report Count (1), */34 0xA4, /* Push, */35 0x05, 0x01, /* Usage Page (Desktop), */36 0x65, 0x13, /* Unit (Inch), */37 0x55, 0xFD, /* Unit Exponent (-3), */38 0x34, /* Physical Minimum (0), */39 0x09, 0x30, /* Usage (X), */40 0x46, 0x5D, 0x21, /* Physical Maximum (8541), */41 0x27, 0x80, 0xA9,42 0x00, 0x00, /* Logical Maximum (43392), */43 0x81, 0x02, /* Input (Variable), */44 0x09, 0x31, /* Usage (Y), */45 0x46, 0xDA, 0x14, /* Physical Maximum (5338), */46 0x26, 0xF0, 0x69, /* Logical Maximum (27120), */47 0x81, 0x02, /* Input (Variable), */48 0xB4, /* Pop, */49 0x14, /* Logical Minimum (0), */50 0x25, 0x01, /* Logical Maximum (1), */51 0x75, 0x01, /* Report Size (1), */52 0x95, 0x01, /* Report Count (1), */53 0x81, 0x03, /* Input (Constant, Variable), */54 0x09, 0x32, /* Usage (In Range), */55 0x09, 0x42, /* Usage (Tip Switch), */56 0x95, 0x02, /* Report Count (2), */57 0x81, 0x02, /* Input (Variable), */58 0x95, 0x05, /* Report Count (5), */59 0x81, 0x03, /* Input (Constant, Variable), */60 0x75, 0x10, /* Report Size (16), */61 0x95, 0x01, /* Report Count (1), */62 0x09, 0x30, /* Usage (Tip Pressure), */63 0x15, 0x05, /* Logical Minimum (5), */64 0x26, 0xFF, 0x07, /* Logical Maximum (2047), */65 0x81, 0x02, /* Input (Variable), */66 0x75, 0x10, /* Report Size (16), */67 0x95, 0x01, /* Report Count (1), */68 0x81, 0x03, /* Input (Constant, Variable), */69 0xC0, /* End Collection, */70 0xC0 /* End Collection */71};72 73static const __u8 *viewsonic_report_fixup(struct hid_device *hdev, __u8 *rdesc,74 unsigned int *rsize)75{76 switch (hdev->product) {77 case USB_DEVICE_ID_VIEWSONIC_PD1011:78 case USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011:79 if (*rsize == PD1011_RDESC_ORIG_SIZE) {80 *rsize = sizeof(pd1011_rdesc_fixed);81 return pd1011_rdesc_fixed;82 }83 break;84 }85 86 return rdesc;87}88 89static const struct hid_device_id viewsonic_devices[] = {90 { HID_USB_DEVICE(USB_VENDOR_ID_VIEWSONIC,91 USB_DEVICE_ID_VIEWSONIC_PD1011) },92 { HID_USB_DEVICE(USB_VENDOR_ID_SIGNOTEC,93 USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011) },94 { }95};96MODULE_DEVICE_TABLE(hid, viewsonic_devices);97 98static struct hid_driver viewsonic_driver = {99 .name = "viewsonic",100 .id_table = viewsonic_devices,101 .report_fixup = viewsonic_report_fixup,102};103module_hid_driver(viewsonic_driver);104 105MODULE_DESCRIPTION("HID driver for ViewSonic devices not fully compliant with HID standard");106MODULE_LICENSE("GPL");107