Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
14a21cd4 JS |
2 | /* |
3 | * HID driver for some a4tech "special" devices | |
4 | * | |
5 | * Copyright (c) 1999 Andreas Gal | |
6 | * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> | |
7 | * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc | |
8 | * Copyright (c) 2006-2007 Jiri Kosina | |
14a21cd4 JS |
9 | * Copyright (c) 2008 Jiri Slaby |
10 | */ | |
11 | ||
12 | /* | |
14a21cd4 JS |
13 | */ |
14 | ||
15 | #include <linux/device.h> | |
16 | #include <linux/input.h> | |
17 | #include <linux/hid.h> | |
18 | #include <linux/module.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
14a21cd4 JS |
20 | |
21 | #include "hid-ids.h" | |
22 | ||
23 | #define A4_2WHEEL_MOUSE_HACK_7 0x01 | |
24 | #define A4_2WHEEL_MOUSE_HACK_B8 0x02 | |
25 | ||
1c703b53 NSJ |
26 | #define A4_WHEEL_ORIENTATION (HID_UP_GENDESK | 0x000000b8) |
27 | ||
14a21cd4 JS |
28 | struct a4tech_sc { |
29 | unsigned long quirks; | |
30 | unsigned int hw_wheel; | |
31 | __s32 delayed_value; | |
32 | }; | |
33 | ||
1c703b53 NSJ |
34 | static int a4_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
35 | struct hid_field *field, struct hid_usage *usage, | |
36 | unsigned long **bit, int *max) | |
37 | { | |
38 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); | |
39 | ||
40 | if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8 && | |
41 | usage->hid == A4_WHEEL_ORIENTATION) { | |
42 | /* | |
43 | * We do not want to have this usage mapped to anything as it's | |
44 | * nonstandard and doesn't really behave like an HID report. | |
45 | * It's only selecting the orientation (vertical/horizontal) of | |
46 | * the previous mouse wheel report. The input_events will be | |
47 | * generated once both reports are recorded in a4_event(). | |
48 | */ | |
49 | return -1; | |
50 | } | |
51 | ||
52 | return 0; | |
53 | ||
54 | } | |
55 | ||
14a21cd4 JS |
56 | static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi, |
57 | struct hid_field *field, struct hid_usage *usage, | |
58 | unsigned long **bit, int *max) | |
59 | { | |
60 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); | |
61 | ||
abf82e8f | 62 | if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) { |
14a21cd4 | 63 | set_bit(REL_HWHEEL, *bit); |
abf82e8f BS |
64 | set_bit(REL_HWHEEL_HI_RES, *bit); |
65 | } | |
14a21cd4 JS |
66 | |
67 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) | |
68 | return -1; | |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
73 | static int a4_event(struct hid_device *hdev, struct hid_field *field, | |
74 | struct hid_usage *usage, __s32 value) | |
75 | { | |
76 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); | |
77 | struct input_dev *input; | |
78 | ||
1c703b53 | 79 | if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput) |
14a21cd4 JS |
80 | return 0; |
81 | ||
82 | input = field->hidinput->input; | |
83 | ||
84 | if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) { | |
abf82e8f | 85 | if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) { |
14a21cd4 JS |
86 | a4->delayed_value = value; |
87 | return 1; | |
88 | } | |
89 | ||
1c703b53 | 90 | if (usage->hid == A4_WHEEL_ORIENTATION) { |
14a21cd4 JS |
91 | input_event(input, EV_REL, value ? REL_HWHEEL : |
92 | REL_WHEEL, a4->delayed_value); | |
abf82e8f BS |
93 | input_event(input, EV_REL, value ? REL_HWHEEL_HI_RES : |
94 | REL_WHEEL_HI_RES, a4->delayed_value * 120); | |
14a21cd4 JS |
95 | return 1; |
96 | } | |
97 | } | |
98 | ||
99 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) { | |
100 | a4->hw_wheel = !!value; | |
101 | return 1; | |
102 | } | |
103 | ||
abf82e8f | 104 | if (usage->code == REL_WHEEL_HI_RES && a4->hw_wheel) { |
14a21cd4 | 105 | input_event(input, usage->type, REL_HWHEEL, value); |
abf82e8f | 106 | input_event(input, usage->type, REL_HWHEEL_HI_RES, value * 120); |
14a21cd4 JS |
107 | return 1; |
108 | } | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id) | |
114 | { | |
115 | struct a4tech_sc *a4; | |
116 | int ret; | |
117 | ||
abf832bf | 118 | a4 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL); |
14a21cd4 | 119 | if (a4 == NULL) { |
4291ee30 | 120 | hid_err(hdev, "can't alloc device descriptor\n"); |
abf832bf | 121 | return -ENOMEM; |
14a21cd4 JS |
122 | } |
123 | ||
124 | a4->quirks = id->driver_data; | |
125 | ||
126 | hid_set_drvdata(hdev, a4); | |
127 | ||
128 | ret = hid_parse(hdev); | |
129 | if (ret) { | |
4291ee30 | 130 | hid_err(hdev, "parse failed\n"); |
abf832bf | 131 | return ret; |
14a21cd4 JS |
132 | } |
133 | ||
93c10132 | 134 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
14a21cd4 | 135 | if (ret) { |
4291ee30 | 136 | hid_err(hdev, "hw start failed\n"); |
abf832bf | 137 | return ret; |
14a21cd4 JS |
138 | } |
139 | ||
140 | return 0; | |
14a21cd4 JS |
141 | } |
142 | ||
143 | static const struct hid_device_id a4_devices[] = { | |
144 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU), | |
145 | .driver_data = A4_2WHEEL_MOUSE_HACK_7 }, | |
146 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D), | |
147 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, | |
b7e1b203 LP |
148 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649), |
149 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, | |
9858c74c MJ |
150 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_NB_95), |
151 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, | |
14a21cd4 JS |
152 | { } |
153 | }; | |
154 | MODULE_DEVICE_TABLE(hid, a4_devices); | |
155 | ||
156 | static struct hid_driver a4_driver = { | |
157 | .name = "a4tech", | |
158 | .id_table = a4_devices, | |
1c703b53 | 159 | .input_mapping = a4_input_mapping, |
14a21cd4 JS |
160 | .input_mapped = a4_input_mapped, |
161 | .event = a4_event, | |
162 | .probe = a4_probe, | |
14a21cd4 | 163 | }; |
f425458e | 164 | module_hid_driver(a4_driver); |
14a21cd4 | 165 | |
14a21cd4 | 166 | MODULE_LICENSE("GPL"); |