| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * HID driver for Saitek devices, currently only the PS1000 (USB gamepad). |
| 3 | * Fixes the HID report descriptor by removing a non-existent axis and |
| 4 | * clearing the constant bit on the input reports for buttons and d-pad. |
| 5 | * (This module is based on "hid-ortek".) |
| 6 | * |
| 7 | * Copyright (c) 2012 Andreas Hübner |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * This program is free software; you can redistribute it and/or modify it |
| 12 | * under the terms of the GNU General Public License as published by the Free |
| 13 | * Software Foundation; either version 2 of the License, or (at your option) |
| 14 | * any later version. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/device.h> |
| 18 | #include <linux/hid.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/kernel.h> |
| 21 | |
| 22 | #include "hid-ids.h" |
| 23 | |
| 24 | static __u8 *saitek_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
| 25 | unsigned int *rsize) |
| 26 | { |
| 27 | if (*rsize == 137 && rdesc[20] == 0x09 && rdesc[21] == 0x33 |
| 28 | && rdesc[94] == 0x81 && rdesc[95] == 0x03 |
| 29 | && rdesc[110] == 0x81 && rdesc[111] == 0x03) { |
| 30 | |
| 31 | hid_info(hdev, "Fixing up Saitek PS1000 report descriptor\n"); |
| 32 | |
| 33 | /* convert spurious axis to a "noop" Logical Minimum (0) */ |
| 34 | rdesc[20] = 0x15; |
| 35 | rdesc[21] = 0x00; |
| 36 | |
| 37 | /* clear constant bit on buttons and d-pad */ |
| 38 | rdesc[95] = 0x02; |
| 39 | rdesc[111] = 0x02; |
| 40 | |
| 41 | } |
| 42 | return rdesc; |
| 43 | } |
| 44 | |
| 45 | static const struct hid_device_id saitek_devices[] = { |
| 46 | { HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_PS1000)}, |
| 47 | { } |
| 48 | }; |
| 49 | |
| 50 | MODULE_DEVICE_TABLE(hid, saitek_devices); |
| 51 | |
| 52 | static struct hid_driver saitek_driver = { |
| 53 | .name = "saitek", |
| 54 | .id_table = saitek_devices, |
| 55 | .report_fixup = saitek_report_fixup |
| 56 | }; |
| 57 | |
| 58 | static int __init saitek_init(void) |
| 59 | { |
| 60 | return hid_register_driver(&saitek_driver); |
| 61 | } |
| 62 | |
| 63 | static void __exit saitek_exit(void) |
| 64 | { |
| 65 | hid_unregister_driver(&saitek_driver); |
| 66 | } |
| 67 | |
| 68 | module_init(saitek_init); |
| 69 | module_exit(saitek_exit); |
| 70 | MODULE_LICENSE("GPL"); |