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1 | /* |
2 | * HID driver for some cypress "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/hid.h> |
21 | #include <linux/input.h> |
22 | #include <linux/module.h> |
23 | |
24 | #include "hid-ids.h" |
25 | |
26 | #define CP_RDESC_SWAPPED_MIN_MAX 0x01 |
27 | #define CP_2WHEEL_MOUSE_HACK 0x02 |
28 | #define CP_2WHEEL_MOUSE_HACK_ON 0x04 |
29 | |
30 | /* |
31 | * Some USB barcode readers from cypress have usage min and usage max in |
32 | * the wrong order |
33 | */ |
34 | static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
35 | unsigned int *rsize) |
36 | { |
37 | unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); |
38 | unsigned int i; |
39 | |
40 | if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX)) |
41 | return rdesc; |
42 | |
43 | for (i = 0; i < *rsize - 4; i++) |
44 | if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) { |
45 | __u8 tmp; |
46 | |
47 | rdesc[i] = 0x19; |
48 | rdesc[i + 2] = 0x29; |
49 | tmp = rdesc[i + 3]; |
50 | rdesc[i + 3] = rdesc[i + 1]; |
51 | rdesc[i + 1] = tmp; |
52 | } |
53 | return rdesc; |
54 | } |
55 | |
56 | static int cp_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 | unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); |
61 | |
62 | if (!(quirks & CP_2WHEEL_MOUSE_HACK)) |
63 | return 0; |
64 | |
65 | if (usage->type == EV_REL && usage->code == REL_WHEEL) |
66 | set_bit(REL_HWHEEL, *bit); |
67 | if (usage->hid == 0x00090005) |
68 | return -1; |
69 | |
70 | return 0; |
71 | } |
72 | |
73 | static int cp_event(struct hid_device *hdev, struct hid_field *field, |
74 | struct hid_usage *usage, __s32 value) |
75 | { |
76 | unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); |
77 | |
78 | if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || |
79 | !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK)) |
80 | return 0; |
81 | |
82 | if (usage->hid == 0x00090005) { |
83 | if (value) |
84 | quirks |= CP_2WHEEL_MOUSE_HACK_ON; |
85 | else |
86 | quirks &= ~CP_2WHEEL_MOUSE_HACK_ON; |
87 | hid_set_drvdata(hdev, (void *)quirks); |
88 | return 1; |
89 | } |
90 | |
91 | if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) { |
92 | struct input_dev *input = field->hidinput->input; |
93 | |
94 | input_event(input, usage->type, REL_HWHEEL, value); |
95 | return 1; |
96 | } |
97 | |
98 | return 0; |
99 | } |
100 | |
101 | static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id) |
102 | { |
103 | unsigned long quirks = id->driver_data; |
104 | int ret; |
105 | |
106 | hid_set_drvdata(hdev, (void *)quirks); |
107 | |
108 | ret = hid_parse(hdev); |
109 | if (ret) { |
110 | hid_err(hdev, "parse failed\n"); |
111 | goto err_free; |
112 | } |
113 | |
114 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
115 | if (ret) { |
116 | hid_err(hdev, "hw start failed\n"); |
117 | goto err_free; |
118 | } |
119 | |
120 | return 0; |
121 | err_free: |
122 | return ret; |
123 | } |
124 | |
125 | static const struct hid_device_id cp_devices[] = { |
126 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1), |
127 | .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
128 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2), |
129 | .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
130 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3), |
131 | .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
132 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4), |
133 | .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
134 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE), |
135 | .driver_data = CP_2WHEEL_MOUSE_HACK }, |
136 | { } |
137 | }; |
138 | MODULE_DEVICE_TABLE(hid, cp_devices); |
139 | |
140 | static struct hid_driver cp_driver = { |
141 | .name = "cypress", |
142 | .id_table = cp_devices, |
143 | .report_fixup = cp_report_fixup, |
144 | .input_mapped = cp_input_mapped, |
145 | .event = cp_event, |
146 | .probe = cp_probe, |
147 | }; |
148 | |
149 | static int __init cp_init(void) |
150 | { |
151 | return hid_register_driver(&cp_driver); |
152 | } |
153 | |
154 | static void __exit cp_exit(void) |
155 | { |
156 | hid_unregister_driver(&cp_driver); |
157 | } |
158 | |
159 | module_init(cp_init); |
160 | module_exit(cp_exit); |
161 | MODULE_LICENSE("GPL"); |
162 |
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