hid: egalax: Correct for device resolution report error
[linux-2.6.git] / drivers / hid / hid-a4tech.c
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>
23 #include <linux/slab.h>
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
111         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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 },
136         { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649),
137                 .driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
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
151 static int __init a4_init(void)
152 {
153         return hid_register_driver(&a4_driver);
154 }
155
156 static void __exit a4_exit(void)
157 {
158         hid_unregister_driver(&a4_driver);
159 }
160
161 module_init(a4_init);
162 module_exit(a4_exit);
163 MODULE_LICENSE("GPL");