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14a21cd4 JS |
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) 2007 Paul Walmsley | |
9 | * Copyright (c) 2008 Jiri Slaby | |
10 | */ | |
11 | ||
12 | /* | |
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) | |
16 | * any later version. | |
17 | */ | |
18 | ||
19 | #include <linux/device.h> | |
20 | #include <linux/input.h> | |
21 | #include <linux/hid.h> | |
22 | #include <linux/module.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
14a21cd4 JS |
24 | |
25 | #include "hid-ids.h" | |
26 | ||
27 | #define A4_2WHEEL_MOUSE_HACK_7 0x01 | |
28 | #define A4_2WHEEL_MOUSE_HACK_B8 0x02 | |
29 | ||
30 | struct a4tech_sc { | |
31 | unsigned long quirks; | |
32 | unsigned int hw_wheel; | |
33 | __s32 delayed_value; | |
34 | }; | |
35 | ||
36 | static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi, | |
37 | struct hid_field *field, struct hid_usage *usage, | |
38 | unsigned long **bit, int *max) | |
39 | { | |
40 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); | |
41 | ||
42 | if (usage->type == EV_REL && usage->code == REL_WHEEL) | |
43 | set_bit(REL_HWHEEL, *bit); | |
44 | ||
45 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) | |
46 | return -1; | |
47 | ||
48 | return 0; | |
49 | } | |
50 | ||
51 | static int a4_event(struct hid_device *hdev, struct hid_field *field, | |
52 | struct hid_usage *usage, __s32 value) | |
53 | { | |
54 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); | |
55 | struct input_dev *input; | |
56 | ||
57 | if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || | |
58 | !usage->type) | |
59 | return 0; | |
60 | ||
61 | input = field->hidinput->input; | |
62 | ||
63 | if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) { | |
64 | if (usage->type == EV_REL && usage->code == REL_WHEEL) { | |
65 | a4->delayed_value = value; | |
66 | return 1; | |
67 | } | |
68 | ||
69 | if (usage->hid == 0x000100b8) { | |
70 | input_event(input, EV_REL, value ? REL_HWHEEL : | |
71 | REL_WHEEL, a4->delayed_value); | |
72 | return 1; | |
73 | } | |
74 | } | |
75 | ||
76 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) { | |
77 | a4->hw_wheel = !!value; | |
78 | return 1; | |
79 | } | |
80 | ||
81 | if (usage->code == REL_WHEEL && a4->hw_wheel) { | |
82 | input_event(input, usage->type, REL_HWHEEL, value); | |
83 | return 1; | |
84 | } | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id) | |
90 | { | |
91 | struct a4tech_sc *a4; | |
92 | int ret; | |
93 | ||
94 | a4 = kzalloc(sizeof(*a4), GFP_KERNEL); | |
95 | if (a4 == NULL) { | |
96 | dev_err(&hdev->dev, "can't alloc device descriptor\n"); | |
97 | ret = -ENOMEM; | |
98 | goto err_free; | |
99 | } | |
100 | ||
101 | a4->quirks = id->driver_data; | |
102 | ||
103 | hid_set_drvdata(hdev, a4); | |
104 | ||
105 | ret = hid_parse(hdev); | |
106 | if (ret) { | |
107 | dev_err(&hdev->dev, "parse failed\n"); | |
108 | goto err_free; | |
109 | } | |
110 | ||
93c10132 | 111 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
14a21cd4 JS |
112 | if (ret) { |
113 | dev_err(&hdev->dev, "hw start failed\n"); | |
114 | goto err_free; | |
115 | } | |
116 | ||
117 | return 0; | |
118 | err_free: | |
119 | kfree(a4); | |
120 | return ret; | |
121 | } | |
122 | ||
123 | static void a4_remove(struct hid_device *hdev) | |
124 | { | |
125 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); | |
126 | ||
127 | hid_hw_stop(hdev); | |
128 | kfree(a4); | |
129 | } | |
130 | ||
131 | static const struct hid_device_id a4_devices[] = { | |
132 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU), | |
133 | .driver_data = A4_2WHEEL_MOUSE_HACK_7 }, | |
134 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D), | |
135 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, | |
b7e1b203 LP |
136 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649), |
137 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, | |
14a21cd4 JS |
138 | { } |
139 | }; | |
140 | MODULE_DEVICE_TABLE(hid, a4_devices); | |
141 | ||
142 | static struct hid_driver a4_driver = { | |
143 | .name = "a4tech", | |
144 | .id_table = a4_devices, | |
145 | .input_mapped = a4_input_mapped, | |
146 | .event = a4_event, | |
147 | .probe = a4_probe, | |
148 | .remove = a4_remove, | |
149 | }; | |
150 | ||
a24f423b | 151 | static int __init a4_init(void) |
14a21cd4 JS |
152 | { |
153 | return hid_register_driver(&a4_driver); | |
154 | } | |
155 | ||
a24f423b | 156 | static void __exit a4_exit(void) |
14a21cd4 JS |
157 | { |
158 | hid_unregister_driver(&a4_driver); | |
159 | } | |
160 | ||
161 | module_init(a4_init); | |
162 | module_exit(a4_exit); | |
163 | MODULE_LICENSE("GPL"); |