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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 | ||
4b18a9c0 NSJ |
29 | #define A4_WHEEL_ORIENTATION (HID_UP_GENDESK | 0x000000b8) |
30 | ||
14a21cd4 JS |
31 | struct a4tech_sc { |
32 | unsigned long quirks; | |
33 | unsigned int hw_wheel; | |
34 | __s32 delayed_value; | |
35 | }; | |
36 | ||
4b18a9c0 NSJ |
37 | static int a4_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
38 | struct hid_field *field, struct hid_usage *usage, | |
39 | unsigned long **bit, int *max) | |
40 | { | |
41 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); | |
42 | ||
43 | if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8 && | |
44 | usage->hid == A4_WHEEL_ORIENTATION) { | |
45 | /* | |
46 | * We do not want to have this usage mapped to anything as it's | |
47 | * nonstandard and doesn't really behave like an HID report. | |
48 | * It's only selecting the orientation (vertical/horizontal) of | |
49 | * the previous mouse wheel report. The input_events will be | |
50 | * generated once both reports are recorded in a4_event(). | |
51 | */ | |
52 | return -1; | |
53 | } | |
54 | ||
55 | return 0; | |
56 | ||
57 | } | |
58 | ||
14a21cd4 JS |
59 | static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi, |
60 | struct hid_field *field, struct hid_usage *usage, | |
61 | unsigned long **bit, int *max) | |
62 | { | |
63 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); | |
64 | ||
65 | if (usage->type == EV_REL && usage->code == REL_WHEEL) | |
66 | set_bit(REL_HWHEEL, *bit); | |
67 | ||
68 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) | |
69 | return -1; | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | static int a4_event(struct hid_device *hdev, struct hid_field *field, | |
75 | struct hid_usage *usage, __s32 value) | |
76 | { | |
77 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); | |
78 | struct input_dev *input; | |
79 | ||
4b18a9c0 | 80 | if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput) |
14a21cd4 JS |
81 | return 0; |
82 | ||
83 | input = field->hidinput->input; | |
84 | ||
85 | if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) { | |
86 | if (usage->type == EV_REL && usage->code == REL_WHEEL) { | |
87 | a4->delayed_value = value; | |
88 | return 1; | |
89 | } | |
90 | ||
4b18a9c0 | 91 | if (usage->hid == A4_WHEEL_ORIENTATION) { |
14a21cd4 JS |
92 | input_event(input, EV_REL, value ? REL_HWHEEL : |
93 | REL_WHEEL, a4->delayed_value); | |
94 | return 1; | |
95 | } | |
96 | } | |
97 | ||
98 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) { | |
99 | a4->hw_wheel = !!value; | |
100 | return 1; | |
101 | } | |
102 | ||
103 | if (usage->code == REL_WHEEL && a4->hw_wheel) { | |
104 | input_event(input, usage->type, REL_HWHEEL, value); | |
105 | return 1; | |
106 | } | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id) | |
112 | { | |
113 | struct a4tech_sc *a4; | |
114 | int ret; | |
115 | ||
abf832bf | 116 | a4 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL); |
14a21cd4 | 117 | if (a4 == NULL) { |
4291ee30 | 118 | hid_err(hdev, "can't alloc device descriptor\n"); |
abf832bf | 119 | return -ENOMEM; |
14a21cd4 JS |
120 | } |
121 | ||
122 | a4->quirks = id->driver_data; | |
123 | ||
124 | hid_set_drvdata(hdev, a4); | |
125 | ||
126 | ret = hid_parse(hdev); | |
127 | if (ret) { | |
4291ee30 | 128 | hid_err(hdev, "parse failed\n"); |
abf832bf | 129 | return ret; |
14a21cd4 JS |
130 | } |
131 | ||
93c10132 | 132 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
14a21cd4 | 133 | if (ret) { |
4291ee30 | 134 | hid_err(hdev, "hw start failed\n"); |
abf832bf | 135 | return ret; |
14a21cd4 JS |
136 | } |
137 | ||
138 | return 0; | |
14a21cd4 JS |
139 | } |
140 | ||
141 | static const struct hid_device_id a4_devices[] = { | |
142 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU), | |
143 | .driver_data = A4_2WHEEL_MOUSE_HACK_7 }, | |
144 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D), | |
145 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, | |
b7e1b203 LP |
146 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649), |
147 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, | |
14a21cd4 JS |
148 | { } |
149 | }; | |
150 | MODULE_DEVICE_TABLE(hid, a4_devices); | |
151 | ||
152 | static struct hid_driver a4_driver = { | |
153 | .name = "a4tech", | |
154 | .id_table = a4_devices, | |
4b18a9c0 | 155 | .input_mapping = a4_input_mapping, |
14a21cd4 JS |
156 | .input_mapped = a4_input_mapped, |
157 | .event = a4_event, | |
158 | .probe = a4_probe, | |
14a21cd4 | 159 | }; |
f425458e | 160 | module_hid_driver(a4_driver); |
14a21cd4 | 161 | |
14a21cd4 | 162 | MODULE_LICENSE("GPL"); |