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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 */
34static __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
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) {
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;
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 },
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_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
147static int __init cp_init(void)
148{
149 return hid_register_driver(&cp_driver);
150}
151
152static void __exit cp_exit(void)
153{
154 hid_unregister_driver(&cp_driver);
155}
156
157module_init(cp_init);
158module_exit(cp_exit);
159MODULE_LICENSE("GPL");
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 */
33static __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 rdesc[i] = 0x19;
45 rdesc[i + 2] = 0x29;
46 swap(rdesc[i + 3], rdesc[i + 1]);
47 }
48 return rdesc;
49}
50
51static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
52 struct hid_field *field, struct hid_usage *usage,
53 unsigned long **bit, int *max)
54{
55 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
56
57 if (!(quirks & CP_2WHEEL_MOUSE_HACK))
58 return 0;
59
60 if (usage->type == EV_REL && usage->code == REL_WHEEL)
61 set_bit(REL_HWHEEL, *bit);
62 if (usage->hid == 0x00090005)
63 return -1;
64
65 return 0;
66}
67
68static int cp_event(struct hid_device *hdev, struct hid_field *field,
69 struct hid_usage *usage, __s32 value)
70{
71 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
72
73 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
74 !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK))
75 return 0;
76
77 if (usage->hid == 0x00090005) {
78 if (value)
79 quirks |= CP_2WHEEL_MOUSE_HACK_ON;
80 else
81 quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
82 hid_set_drvdata(hdev, (void *)quirks);
83 return 1;
84 }
85
86 if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
87 struct input_dev *input = field->hidinput->input;
88
89 input_event(input, usage->type, REL_HWHEEL, value);
90 return 1;
91 }
92
93 return 0;
94}
95
96static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id)
97{
98 unsigned long quirks = id->driver_data;
99 int ret;
100
101 hid_set_drvdata(hdev, (void *)quirks);
102
103 ret = hid_parse(hdev);
104 if (ret) {
105 hid_err(hdev, "parse failed\n");
106 goto err_free;
107 }
108
109 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
110 if (ret) {
111 hid_err(hdev, "hw start failed\n");
112 goto err_free;
113 }
114
115 return 0;
116err_free:
117 return ret;
118}
119
120static const struct hid_device_id cp_devices[] = {
121 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1),
122 .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
123 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2),
124 .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
125 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
126 .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
127 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4),
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};
133MODULE_DEVICE_TABLE(hid, cp_devices);
134
135static 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};
143module_hid_driver(cp_driver);
144
145MODULE_LICENSE("GPL");