blob: 998b6f443d7dc062fff6263030209850d0c43221 [file] [log] [blame]
Jiri Slaby0f221322008-06-23 22:54:08 +02001/*
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 */
34static 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
55static 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
72static 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
100static 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
Jiri Slaby93c10132008-06-27 00:04:24 +0200113 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
Jiri Slaby0f221322008-06-23 22:54:08 +0200114 if (ret) {
115 dev_err(&hdev->dev, "hw start failed\n");
116 goto err_free;
117 }
118
119 return 0;
120err_free:
121 return ret;
122}
123
124static 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 },
Jiri Kosinae8d0eab2009-12-02 22:54:11 +0100129 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
130 .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
Jiri Slaby0f221322008-06-23 22:54:08 +0200131 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
132 .driver_data = CP_2WHEEL_MOUSE_HACK },
133 { }
134};
135MODULE_DEVICE_TABLE(hid, cp_devices);
136
137static struct hid_driver cp_driver = {
138 .name = "cypress",
139 .id_table = cp_devices,
140 .report_fixup = cp_report_fixup,
141 .input_mapped = cp_input_mapped,
142 .event = cp_event,
143 .probe = cp_probe,
144};
145
Peter Huewea24f423b2009-07-02 19:08:38 +0200146static int __init cp_init(void)
Jiri Slaby0f221322008-06-23 22:54:08 +0200147{
148 return hid_register_driver(&cp_driver);
149}
150
Peter Huewea24f423b2009-07-02 19:08:38 +0200151static void __exit cp_exit(void)
Jiri Slaby0f221322008-06-23 22:54:08 +0200152{
153 hid_unregister_driver(&cp_driver);
154}
155
156module_init(cp_init);
157module_exit(cp_exit);
158MODULE_LICENSE("GPL");