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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) 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/hid.h> |
20 | #include <linux/input.h> |
21 | #include <linux/module.h> |
22 | |
23 | #include "hid-ids.h" |
24 | |
25 | #define CP_RDESC_SWAPPED_MIN_MAX 0x01 |
26 | #define CP_2WHEEL_MOUSE_HACK 0x02 |
27 | #define CP_2WHEEL_MOUSE_HACK_ON 0x04 |
28 | |
29 | /* |
30 | * Some USB barcode readers from cypress have usage min and usage max in |
31 | * the wrong order |
32 | */ |
33 | static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
34 | unsigned int *rsize) |
35 | { |
36 | unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); |
37 | unsigned int i; |
38 | |
39 | if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX)) |
40 | return rdesc; |
41 | |
42 | for (i = 0; i < *rsize - 4; i++) |
43 | if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) { |
44 | __u8 tmp; |
45 | |
46 | rdesc[i] = 0x19; |
47 | rdesc[i + 2] = 0x29; |
48 | tmp = rdesc[i + 3]; |
49 | rdesc[i + 3] = rdesc[i + 1]; |
50 | rdesc[i + 1] = tmp; |
51 | } |
52 | return rdesc; |
53 | } |
54 | |
55 | static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi, |
56 | struct hid_field *field, struct hid_usage *usage, |
57 | unsigned long **bit, int *max) |
58 | { |
59 | unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); |
60 | |
61 | if (!(quirks & CP_2WHEEL_MOUSE_HACK)) |
62 | return 0; |
63 | |
64 | if (usage->type == EV_REL && usage->code == REL_WHEEL) |
65 | set_bit(REL_HWHEEL, *bit); |
66 | if (usage->hid == 0x00090005) |
67 | return -1; |
68 | |
69 | return 0; |
70 | } |
71 | |
72 | static int cp_event(struct hid_device *hdev, struct hid_field *field, |
73 | struct hid_usage *usage, __s32 value) |
74 | { |
75 | unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); |
76 | |
77 | if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || |
78 | !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK)) |
79 | return 0; |
80 | |
81 | if (usage->hid == 0x00090005) { |
82 | if (value) |
83 | quirks |= CP_2WHEEL_MOUSE_HACK_ON; |
84 | else |
85 | quirks &= ~CP_2WHEEL_MOUSE_HACK_ON; |
86 | hid_set_drvdata(hdev, (void *)quirks); |
87 | return 1; |
88 | } |
89 | |
90 | if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) { |
91 | struct input_dev *input = field->hidinput->input; |
92 | |
93 | input_event(input, usage->type, REL_HWHEEL, value); |
94 | return 1; |
95 | } |
96 | |
97 | return 0; |
98 | } |
99 | |
100 | static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id) |
101 | { |
102 | unsigned long quirks = id->driver_data; |
103 | int ret; |
104 | |
105 | hid_set_drvdata(hdev, (void *)quirks); |
106 | |
107 | ret = hid_parse(hdev); |
108 | if (ret) { |
109 | hid_err(hdev, "parse failed\n"); |
110 | goto err_free; |
111 | } |
112 | |
113 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
114 | if (ret) { |
115 | hid_err(hdev, "hw start failed\n"); |
116 | goto err_free; |
117 | } |
118 | |
119 | return 0; |
120 | err_free: |
121 | return ret; |
122 | } |
123 | |
124 | static const struct hid_device_id cp_devices[] = { |
125 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1), |
126 | .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
127 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2), |
128 | .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
129 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3), |
130 | .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
131 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4), |
132 | .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
133 | { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE), |
134 | .driver_data = CP_2WHEEL_MOUSE_HACK }, |
135 | { } |
136 | }; |
137 | MODULE_DEVICE_TABLE(hid, cp_devices); |
138 | |
139 | static struct hid_driver cp_driver = { |
140 | .name = "cypress", |
141 | .id_table = cp_devices, |
142 | .report_fixup = cp_report_fixup, |
143 | .input_mapped = cp_input_mapped, |
144 | .event = cp_event, |
145 | .probe = cp_probe, |
146 | }; |
147 | module_hid_driver(cp_driver); |
148 | |
149 | MODULE_LICENSE("GPL"); |
150 |
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