2 * HID driver for some a4tech "special" devices
4 * Copyright (c) 1999 Andreas Gal
5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
7 * Copyright (c) 2006-2007 Jiri Kosina
8 * Copyright (c) 2007 Paul Walmsley
9 * Copyright (c) 2008 Jiri Slaby
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
19 #include <linux/device.h>
20 #include <linux/input.h>
21 #include <linux/hid.h>
22 #include <linux/module.h>
26 #define A4_2WHEEL_MOUSE_HACK_7 0x01
27 #define A4_2WHEEL_MOUSE_HACK_B8 0x02
31 unsigned int hw_wheel;
35 static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi,
36 struct hid_field *field, struct hid_usage *usage,
37 unsigned long **bit, int *max)
39 struct a4tech_sc *a4 = hid_get_drvdata(hdev);
41 if (usage->type == EV_REL && usage->code == REL_WHEEL)
42 set_bit(REL_HWHEEL, *bit);
44 if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007)
50 static int a4_event(struct hid_device *hdev, struct hid_field *field,
51 struct hid_usage *usage, __s32 value)
53 struct a4tech_sc *a4 = hid_get_drvdata(hdev);
54 struct input_dev *input;
56 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
60 input = field->hidinput->input;
62 if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) {
63 if (usage->type == EV_REL && usage->code == REL_WHEEL) {
64 a4->delayed_value = value;
68 if (usage->hid == 0x000100b8) {
69 input_event(input, EV_REL, value ? REL_HWHEEL :
70 REL_WHEEL, a4->delayed_value);
75 if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) {
76 a4->hw_wheel = !!value;
80 if (usage->code == REL_WHEEL && a4->hw_wheel) {
81 input_event(input, usage->type, REL_HWHEEL, value);
88 static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id)
93 a4 = kzalloc(sizeof(*a4), GFP_KERNEL);
95 dev_err(&hdev->dev, "can't alloc device descriptor\n");
100 a4->quirks = id->driver_data;
102 hid_set_drvdata(hdev, a4);
104 ret = hid_parse(hdev);
106 dev_err(&hdev->dev, "parse failed\n");
110 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
112 dev_err(&hdev->dev, "hw start failed\n");
122 static void a4_remove(struct hid_device *hdev)
124 struct a4tech_sc *a4 = hid_get_drvdata(hdev);
130 static const struct hid_device_id a4_devices[] = {
131 { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU),
132 .driver_data = A4_2WHEEL_MOUSE_HACK_7 },
133 { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D),
134 .driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
137 MODULE_DEVICE_TABLE(hid, a4_devices);
139 static struct hid_driver a4_driver = {
141 .id_table = a4_devices,
142 .input_mapped = a4_input_mapped,
148 static int a4_init(void)
150 return hid_register_driver(&a4_driver);
153 static void a4_exit(void)
155 hid_unregister_driver(&a4_driver);
158 module_init(a4_init);
159 module_exit(a4_exit);
160 MODULE_LICENSE("GPL");