| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * HID driver for ViewSonic devices not fully compliant with HID standard |
| * |
| * Copyright (c) 2017 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" |
| |
| /* Size of the original descriptor of PD1011 signature pad */ |
| #define PD1011_RDESC_ORIG_SIZE 408 |
| |
| /* Fixed report descriptor of PD1011 signature pad */ |
| static __u8 pd1011_rdesc_fixed[] = { |
| 0x05, 0x0D, /* Usage Page (Digitizer), */ |
| 0x09, 0x01, /* Usage (Digitizer), */ |
| 0xA1, 0x01, /* Collection (Application), */ |
| 0x85, 0x02, /* Report ID (2), */ |
| 0x09, 0x20, /* Usage (Stylus), */ |
| 0xA0, /* Collection (Physical), */ |
| 0x75, 0x10, /* Report Size (16), */ |
| 0x95, 0x01, /* Report Count (1), */ |
| 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, 0x5D, 0x21, /* Physical Maximum (8541), */ |
| 0x27, 0x80, 0xA9, |
| 0x00, 0x00, /* Logical Maximum (43392), */ |
| 0x81, 0x02, /* Input (Variable), */ |
| 0x09, 0x31, /* Usage (Y), */ |
| 0x46, 0xDA, 0x14, /* Physical Maximum (5338), */ |
| 0x26, 0xF0, 0x69, /* Logical Maximum (27120), */ |
| 0x81, 0x02, /* Input (Variable), */ |
| 0xB4, /* Pop, */ |
| 0x14, /* Logical Minimum (0), */ |
| 0x25, 0x01, /* Logical Maximum (1), */ |
| 0x75, 0x01, /* Report Size (1), */ |
| 0x95, 0x01, /* Report Count (1), */ |
| 0x81, 0x03, /* Input (Constant, Variable), */ |
| 0x09, 0x32, /* Usage (In Range), */ |
| 0x09, 0x42, /* Usage (Tip Switch), */ |
| 0x95, 0x02, /* Report Count (2), */ |
| 0x81, 0x02, /* Input (Variable), */ |
| 0x95, 0x05, /* Report Count (5), */ |
| 0x81, 0x03, /* Input (Constant, Variable), */ |
| 0x75, 0x10, /* Report Size (16), */ |
| 0x95, 0x01, /* Report Count (1), */ |
| 0x09, 0x30, /* Usage (Tip Pressure), */ |
| 0x15, 0x05, /* Logical Minimum (5), */ |
| 0x26, 0xFF, 0x07, /* Logical Maximum (2047), */ |
| 0x81, 0x02, /* Input (Variable), */ |
| 0x75, 0x10, /* Report Size (16), */ |
| 0x95, 0x01, /* Report Count (1), */ |
| 0x81, 0x03, /* Input (Constant, Variable), */ |
| 0xC0, /* End Collection, */ |
| 0xC0 /* End Collection */ |
| }; |
| |
| static __u8 *viewsonic_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
| unsigned int *rsize) |
| { |
| switch (hdev->product) { |
| case USB_DEVICE_ID_VIEWSONIC_PD1011: |
| case USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011: |
| if (*rsize == PD1011_RDESC_ORIG_SIZE) { |
| rdesc = pd1011_rdesc_fixed; |
| *rsize = sizeof(pd1011_rdesc_fixed); |
| } |
| break; |
| } |
| |
| return rdesc; |
| } |
| |
| static const struct hid_device_id viewsonic_devices[] = { |
| { HID_USB_DEVICE(USB_VENDOR_ID_VIEWSONIC, |
| USB_DEVICE_ID_VIEWSONIC_PD1011) }, |
| { HID_USB_DEVICE(USB_VENDOR_ID_SIGNOTEC, |
| USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011) }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(hid, viewsonic_devices); |
| |
| static struct hid_driver viewsonic_driver = { |
| .name = "viewsonic", |
| .id_table = viewsonic_devices, |
| .report_fixup = viewsonic_report_fixup, |
| }; |
| module_hid_driver(viewsonic_driver); |
| |
| MODULE_DESCRIPTION("HID driver for ViewSonic devices not fully compliant with HID standard"); |
| MODULE_LICENSE("GPL"); |
