blob: 2f0be4c66af72f356fb2cedf144c1d45375493a7 [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 */
Nikolai Kondrashov73e40082010-08-06 23:03:06 +040034static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
35 unsigned int *rsize)
Jiri Slaby0f221322008-06-23 22:54:08 +020036{
37 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
38 unsigned int i;
39
40 if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX))
Nikolai Kondrashov73e40082010-08-06 23:03:06 +040041 return rdesc;
Jiri Slaby0f221322008-06-23 22:54:08 +020042
Nikolai Kondrashov73e40082010-08-06 23:03:06 +040043 for (i = 0; i < *rsize - 4; i++)
Jiri Slaby0f221322008-06-23 22:54:08 +020044 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 }
Nikolai Kondrashov73e40082010-08-06 23:03:06 +040053 return rdesc;
Jiri Slaby0f221322008-06-23 22:54:08 +020054}
55
56static 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
73static 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
101static 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) {
Joe Perches4291ee32010-12-09 19:29:03 -0800110 hid_err(hdev, "parse failed\n");
Jiri Slaby0f221322008-06-23 22:54:08 +0200111 goto err_free;
112 }
113
Jiri Slaby93c10132008-06-27 00:04:24 +0200114 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
Jiri Slaby0f221322008-06-23 22:54:08 +0200115 if (ret) {
Joe Perches4291ee32010-12-09 19:29:03 -0800116 hid_err(hdev, "hw start failed\n");
Jiri Slaby0f221322008-06-23 22:54:08 +0200117 goto err_free;
118 }
119
120 return 0;
121err_free:
122 return ret;
123}
124
125static 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 },
Jiri Kosinae8d0eab2009-12-02 22:54:11 +0100130 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
131 .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
Jiri Slaby0f221322008-06-23 22:54:08 +0200132 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
133 .driver_data = CP_2WHEEL_MOUSE_HACK },
134 { }
135};
136MODULE_DEVICE_TABLE(hid, cp_devices);
137
138static struct hid_driver cp_driver = {
139 .name = "cypress",
140 .id_table = cp_devices,
141 .report_fixup = cp_report_fixup,
142 .input_mapped = cp_input_mapped,
143 .event = cp_event,
144 .probe = cp_probe,
145};
146
Peter Huewea24f423b2009-07-02 19:08:38 +0200147static int __init cp_init(void)
Jiri Slaby0f221322008-06-23 22:54:08 +0200148{
149 return hid_register_driver(&cp_driver);
150}
151
Peter Huewea24f423b2009-07-02 19:08:38 +0200152static void __exit cp_exit(void)
Jiri Slaby0f221322008-06-23 22:54:08 +0200153{
154 hid_unregister_driver(&cp_driver);
155}
156
157module_init(cp_init);
158module_exit(cp_exit);
159MODULE_LICENSE("GPL");