projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 74bc6953 SK |
1 | /* |
| 2 | * HID driver for Speedlink Vicious and Divine Cezanne (USB mouse). | |
| 3 | * Fixes "jumpy" cursor and removes nonexistent keyboard LEDS from | |
| 4 | * the HID descriptor. | |
| 5 | * | |
| 06bb5219 | 6 | * Copyright (c) 2011, 2013 Stefan Kriwanek <[email protected]> |
| 74bc6953 SK |
7 | */ |
| 8 | ||
| 9 | /* | |
| 10 | * This program is free software; you can redistribute it and/or modify it | |
| 11 | * under the terms of the GNU General Public License as published by the Free | |
| 12 | * Software Foundation; either version 2 of the License, or (at your option) | |
| 13 | * any later version. | |
| 14 | */ | |
| 15 | ||
| 16 | #include <linux/device.h> | |
| 17 | #include <linux/hid.h> | |
| 18 | #include <linux/module.h> | |
| 74bc6953 SK |
19 | |
| 20 | #include "hid-ids.h" | |
| 74bc6953 SK |
21 | |
| 22 | static const struct hid_device_id speedlink_devices[] = { | |
| 23 | { HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE)}, | |
| 24 | { } | |
| 25 | }; | |
| 26 | ||
| 27 | static int speedlink_input_mapping(struct hid_device *hdev, | |
| 28 | struct hid_input *hi, | |
| 29 | struct hid_field *field, struct hid_usage *usage, | |
| 30 | unsigned long **bit, int *max) | |
| 31 | { | |
| 32 | /* | |
| 33 | * The Cezanne mouse has a second "keyboard" USB endpoint for it is | |
| 34 | * able to map keyboard events to the button presses. | |
| 35 | * It sends a standard keyboard report descriptor, though, whose | |
| 36 | * LEDs we ignore. | |
| 37 | */ | |
| 38 | switch (usage->hid & HID_USAGE_PAGE) { | |
| 39 | case HID_UP_LED: | |
| 40 | return -1; | |
| 41 | } | |
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| 45 | static int speedlink_event(struct hid_device *hdev, struct hid_field *field, | |
| 46 | struct hid_usage *usage, __s32 value) | |
| 47 | { | |
| 48 | /* No other conditions due to usage_table. */ | |
| 06bb5219 SK |
49 | |
| 50 | /* This fixes the "jumpy" cursor occuring due to invalid events sent | |
| 51 | * by the device. Some devices only send them with value==+256, others | |
| 52 | * don't. However, catching abs(value)>=256 is restrictive enough not | |
| 53 | * to interfere with devices that were bug-free (has been tested). | |
| 54 | */ | |
| 55 | if (abs(value) >= 256) | |
| 74bc6953 SK |
56 | return 1; |
| 57 | /* Drop useless distance 0 events (on button clicks etc.) as well */ | |
| 58 | if (value == 0) | |
| 59 | return 1; | |
| 60 | ||
| 61 | return 0; | |
| 62 | } | |
| 63 | ||
| 64 | MODULE_DEVICE_TABLE(hid, speedlink_devices); | |
| 65 | ||
| 66 | static const struct hid_usage_id speedlink_grabbed_usages[] = { | |
| 67 | { HID_GD_X, EV_REL, 0 }, | |
| 68 | { HID_GD_Y, EV_REL, 1 }, | |
| 69 | { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1} | |
| 70 | }; | |
| 71 | ||
| 72 | static struct hid_driver speedlink_driver = { | |
| 73 | .name = "speedlink", | |
| 74 | .id_table = speedlink_devices, | |
| 75 | .usage_table = speedlink_grabbed_usages, | |
| 76 | .input_mapping = speedlink_input_mapping, | |
| 77 | .event = speedlink_event, | |
| 78 | }; | |
| f425458e | 79 | module_hid_driver(speedlink_driver); |
| 74bc6953 | 80 | |
| 74bc6953 | 81 | MODULE_LICENSE("GPL"); |