Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0-or-later
2 : /*
3 : * HID driver for some cypress "special" devices
4 : *
5 : * Copyright (c) 1999 Andreas Gal
6 : * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
7 : * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
8 : * Copyright (c) 2006-2007 Jiri Kosina
9 : * Copyright (c) 2008 Jiri Slaby
10 : */
11 :
12 : /*
13 : */
14 :
15 : #include <linux/device.h>
16 : #include <linux/hid.h>
17 : #include <linux/input.h>
18 : #include <linux/module.h>
19 :
20 : #include "hid-ids.h"
21 :
22 : #define CP_RDESC_SWAPPED_MIN_MAX 0x01
23 : #define CP_2WHEEL_MOUSE_HACK 0x02
24 : #define CP_2WHEEL_MOUSE_HACK_ON 0x04
25 :
26 : #define VA_INVAL_LOGICAL_BOUNDARY 0x08
27 :
28 : /*
29 : * Some USB barcode readers from cypress have usage min and usage max in
30 : * the wrong order
31 : */
32 0 : static __u8 *cp_rdesc_fixup(struct hid_device *hdev, __u8 *rdesc,
33 : unsigned int *rsize)
34 : {
35 : unsigned int i;
36 :
37 0 : if (*rsize < 4)
38 : return rdesc;
39 :
40 0 : for (i = 0; i < *rsize - 4; i++)
41 0 : if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
42 0 : rdesc[i] = 0x19;
43 0 : rdesc[i + 2] = 0x29;
44 0 : swap(rdesc[i + 3], rdesc[i + 1]);
45 : }
46 : return rdesc;
47 : }
48 :
49 0 : static __u8 *va_logical_boundary_fixup(struct hid_device *hdev, __u8 *rdesc,
50 : unsigned int *rsize)
51 : {
52 : /*
53 : * Varmilo VA104M (with VID Cypress and device ID 07B1) incorrectly
54 : * reports Logical Minimum of its Consumer Control device as 572
55 : * (0x02 0x3c). Fix this by setting its Logical Minimum to zero.
56 : */
57 0 : if (*rsize == 25 &&
58 0 : rdesc[0] == 0x05 && rdesc[1] == 0x0c &&
59 0 : rdesc[2] == 0x09 && rdesc[3] == 0x01 &&
60 0 : rdesc[6] == 0x19 && rdesc[7] == 0x00 &&
61 0 : rdesc[11] == 0x16 && rdesc[12] == 0x3c && rdesc[13] == 0x02) {
62 0 : hid_info(hdev,
63 : "fixing up varmilo VA104M consumer control report descriptor\n");
64 0 : rdesc[12] = 0x00;
65 0 : rdesc[13] = 0x00;
66 : }
67 0 : return rdesc;
68 : }
69 :
70 0 : static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
71 : unsigned int *rsize)
72 : {
73 0 : unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
74 :
75 0 : if (quirks & CP_RDESC_SWAPPED_MIN_MAX)
76 0 : rdesc = cp_rdesc_fixup(hdev, rdesc, rsize);
77 0 : if (quirks & VA_INVAL_LOGICAL_BOUNDARY)
78 0 : rdesc = va_logical_boundary_fixup(hdev, rdesc, rsize);
79 :
80 0 : return rdesc;
81 : }
82 :
83 0 : static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
84 : struct hid_field *field, struct hid_usage *usage,
85 : unsigned long **bit, int *max)
86 : {
87 0 : unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
88 :
89 0 : if (!(quirks & CP_2WHEEL_MOUSE_HACK))
90 : return 0;
91 :
92 0 : if (usage->type == EV_REL && usage->code == REL_WHEEL)
93 0 : set_bit(REL_HWHEEL, *bit);
94 0 : if (usage->hid == 0x00090005)
95 : return -1;
96 :
97 0 : return 0;
98 : }
99 :
100 0 : static int cp_event(struct hid_device *hdev, struct hid_field *field,
101 : struct hid_usage *usage, __s32 value)
102 : {
103 0 : unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
104 :
105 0 : if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
106 0 : !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK))
107 : return 0;
108 :
109 0 : if (usage->hid == 0x00090005) {
110 0 : if (value)
111 0 : quirks |= CP_2WHEEL_MOUSE_HACK_ON;
112 : else
113 0 : quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
114 0 : hid_set_drvdata(hdev, (void *)quirks);
115 0 : return 1;
116 : }
117 :
118 0 : if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
119 0 : struct input_dev *input = field->hidinput->input;
120 :
121 0 : input_event(input, usage->type, REL_HWHEEL, value);
122 0 : return 1;
123 : }
124 :
125 : return 0;
126 : }
127 :
128 0 : static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id)
129 : {
130 0 : unsigned long quirks = id->driver_data;
131 : int ret;
132 :
133 0 : hid_set_drvdata(hdev, (void *)quirks);
134 :
135 0 : ret = hid_parse(hdev);
136 0 : if (ret) {
137 0 : hid_err(hdev, "parse failed\n");
138 0 : goto err_free;
139 : }
140 :
141 0 : ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
142 0 : if (ret) {
143 0 : hid_err(hdev, "hw start failed\n");
144 0 : goto err_free;
145 : }
146 :
147 : return 0;
148 : err_free:
149 : return ret;
150 : }
151 :
152 : static const struct hid_device_id cp_devices[] = {
153 : { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1),
154 : .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
155 : { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2),
156 : .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
157 : { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
158 : .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
159 : { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4),
160 : .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
161 : { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
162 : .driver_data = CP_2WHEEL_MOUSE_HACK },
163 : { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_VARMILO_VA104M_07B1),
164 : .driver_data = VA_INVAL_LOGICAL_BOUNDARY },
165 : { }
166 : };
167 : MODULE_DEVICE_TABLE(hid, cp_devices);
168 :
169 : static struct hid_driver cp_driver = {
170 : .name = "cypress",
171 : .id_table = cp_devices,
172 : .report_fixup = cp_report_fixup,
173 : .input_mapped = cp_input_mapped,
174 : .event = cp_event,
175 : .probe = cp_probe,
176 : };
177 1 : module_hid_driver(cp_driver);
178 :
179 : MODULE_LICENSE("GPL");
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