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1 | /* |
2 | * HID driver for some a4tech "special" devices |
3 | * |
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) 2008 Jiri Slaby |
9 | */ |
10 | |
11 | /* |
12 | * This program is free software; you can redistribute it and/or modify it |
13 | * under the terms of the GNU General Public License as published by the Free |
14 | * Software Foundation; either version 2 of the License, or (at your option) |
15 | * any later version. |
16 | */ |
17 | |
18 | #include <linux/device.h> |
19 | #include <linux/input.h> |
20 | #include <linux/hid.h> |
21 | #include <linux/module.h> |
22 | #include <linux/slab.h> |
23 | |
24 | #include "hid-ids.h" |
25 | |
26 | #define A4_2WHEEL_MOUSE_HACK_7 0x01 |
27 | #define A4_2WHEEL_MOUSE_HACK_B8 0x02 |
28 | |
29 | struct a4tech_sc { |
30 | unsigned long quirks; |
31 | unsigned int hw_wheel; |
32 | __s32 delayed_value; |
33 | }; |
34 | |
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) |
38 | { |
39 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); |
40 | |
41 | if (usage->type == EV_REL && usage->code == REL_WHEEL) |
42 | set_bit(REL_HWHEEL, *bit); |
43 | |
44 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) |
45 | return -1; |
46 | |
47 | return 0; |
48 | } |
49 | |
50 | static int a4_event(struct hid_device *hdev, struct hid_field *field, |
51 | struct hid_usage *usage, __s32 value) |
52 | { |
53 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); |
54 | struct input_dev *input; |
55 | |
56 | if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || |
57 | !usage->type) |
58 | return 0; |
59 | |
60 | input = field->hidinput->input; |
61 | |
62 | if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) { |
63 | if (usage->type == EV_REL && usage->code == REL_WHEEL) { |
64 | a4->delayed_value = value; |
65 | return 1; |
66 | } |
67 | |
68 | if (usage->hid == 0x000100b8) { |
69 | input_event(input, EV_REL, value ? REL_HWHEEL : |
70 | REL_WHEEL, a4->delayed_value); |
71 | return 1; |
72 | } |
73 | } |
74 | |
75 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) { |
76 | a4->hw_wheel = !!value; |
77 | return 1; |
78 | } |
79 | |
80 | if (usage->code == REL_WHEEL && a4->hw_wheel) { |
81 | input_event(input, usage->type, REL_HWHEEL, value); |
82 | return 1; |
83 | } |
84 | |
85 | return 0; |
86 | } |
87 | |
88 | static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id) |
89 | { |
90 | struct a4tech_sc *a4; |
91 | int ret; |
92 | |
93 | a4 = kzalloc(sizeof(*a4), GFP_KERNEL); |
94 | if (a4 == NULL) { |
95 | hid_err(hdev, "can't alloc device descriptor\n"); |
96 | ret = -ENOMEM; |
97 | goto err_free; |
98 | } |
99 | |
100 | a4->quirks = id->driver_data; |
101 | |
102 | hid_set_drvdata(hdev, a4); |
103 | |
104 | ret = hid_parse(hdev); |
105 | if (ret) { |
106 | hid_err(hdev, "parse failed\n"); |
107 | goto err_free; |
108 | } |
109 | |
110 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
111 | if (ret) { |
112 | hid_err(hdev, "hw start failed\n"); |
113 | goto err_free; |
114 | } |
115 | |
116 | return 0; |
117 | err_free: |
118 | kfree(a4); |
119 | return ret; |
120 | } |
121 | |
122 | static void a4_remove(struct hid_device *hdev) |
123 | { |
124 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); |
125 | |
126 | hid_hw_stop(hdev); |
127 | kfree(a4); |
128 | } |
129 | |
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 }, |
135 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649), |
136 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, |
137 | { } |
138 | }; |
139 | MODULE_DEVICE_TABLE(hid, a4_devices); |
140 | |
141 | static struct hid_driver a4_driver = { |
142 | .name = "a4tech", |
143 | .id_table = a4_devices, |
144 | .input_mapped = a4_input_mapped, |
145 | .event = a4_event, |
146 | .probe = a4_probe, |
147 | .remove = a4_remove, |
148 | }; |
149 | module_hid_driver(a4_driver); |
150 | |
151 | MODULE_LICENSE("GPL"); |
152 |
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