Commit | Line | Data |
---|---|---|
0f221320 JS |
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 void 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; | |
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 | } | |
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 | dev_err(&hdev->dev, "parse failed\n"); | |
110 | goto err_free; | |
111 | } | |
112 | ||
93c10132 | 113 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
0f221320 JS |
114 | if (ret) { |
115 | dev_err(&hdev->dev, "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_MOUSE), | |
130 | .driver_data = CP_2WHEEL_MOUSE_HACK }, | |
131 | { } | |
132 | }; | |
133 | MODULE_DEVICE_TABLE(hid, cp_devices); | |
134 | ||
135 | static struct hid_driver cp_driver = { | |
136 | .name = "cypress", | |
137 | .id_table = cp_devices, | |
138 | .report_fixup = cp_report_fixup, | |
139 | .input_mapped = cp_input_mapped, | |
140 | .event = cp_event, | |
141 | .probe = cp_probe, | |
142 | }; | |
143 | ||
144 | static int cp_init(void) | |
145 | { | |
146 | return hid_register_driver(&cp_driver); | |
147 | } | |
148 | ||
149 | static void cp_exit(void) | |
150 | { | |
151 | hid_unregister_driver(&cp_driver); | |
152 | } | |
153 | ||
154 | module_init(cp_init); | |
155 | module_exit(cp_exit); | |
156 | MODULE_LICENSE("GPL"); | |
157 | ||
158 | HID_COMPAT_LOAD_DRIVER(cypress); |