| Nikolai Kondrashov | 7c2af0a | 2019-02-10 12:13:48 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * HID driver for ViewSonic devices not fully compliant with HID standard |
| 4 | * |
| 5 | * Copyright (c) 2017 Nikolai Kondrashov |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License as published by the Free |
| 11 | * 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 408 |
| 23 | |
| 24 | /* Fixed report descriptor of PD1011 signature pad */ |
| 25 | static __u8 pd1011_rdesc_fixed[] = { |
| 26 | 0x05, 0x0D, /* Usage Page (Digitizer), */ |
| 27 | 0x09, 0x02, /* Usage (Pen), */ |
| 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 | |
| 73 | static __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 | rdesc = pd1011_rdesc_fixed; |
| 81 | *rsize = sizeof(pd1011_rdesc_fixed); |
| 82 | } |
| 83 | break; |
| 84 | } |
| 85 | |
| 86 | return rdesc; |
| 87 | } |
| 88 | |
| 89 | static 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 | }; |
| 96 | MODULE_DEVICE_TABLE(hid, viewsonic_devices); |
| 97 | |
| 98 | static struct hid_driver viewsonic_driver = { |
| 99 | .name = "viewsonic", |
| 100 | .id_table = viewsonic_devices, |
| 101 | .report_fixup = viewsonic_report_fixup, |
| 102 | }; |
| 103 | module_hid_driver(viewsonic_driver); |
| 104 | |
| 105 | MODULE_LICENSE("GPL"); |