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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 | |
14a21cd4 JS |
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> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
14a21cd4 JS |
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) { | |
4291ee30 | 95 | hid_err(hdev, "can't alloc device descriptor\n"); |
14a21cd4 JS |
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) { | |
4291ee30 | 106 | hid_err(hdev, "parse failed\n"); |
14a21cd4 JS |
107 | goto err_free; |
108 | } | |
109 | ||
93c10132 | 110 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
14a21cd4 | 111 | if (ret) { |
4291ee30 | 112 | hid_err(hdev, "hw start failed\n"); |
14a21cd4 JS |
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 }, | |
b7e1b203 LP |
135 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649), |
136 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, | |
14a21cd4 JS |
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 | }; | |
f425458e | 149 | module_hid_driver(a4_driver); |
14a21cd4 | 150 | |
14a21cd4 | 151 | MODULE_LICENSE("GPL"); |