1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * HID driver for some cypress "special" devices
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
15 #include <linux/device.h>
16 #include <linux/hid.h>
17 #include <linux/input.h>
18 #include <linux/module.h>
22 #define CP_RDESC_SWAPPED_MIN_MAX 0x01
23 #define CP_2WHEEL_MOUSE_HACK 0x02
24 #define CP_2WHEEL_MOUSE_HACK_ON 0x04
26 #define VA_INVAL_LOGICAL_BOUNDARY 0x08
29 * Some USB barcode readers from cypress have usage min and usage max in
32 static __u8 *cp_rdesc_fixup(struct hid_device *hdev, __u8 *rdesc,
40 for (i = 0; i < *rsize - 4; i++)
41 if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
44 swap(rdesc[i + 3], rdesc[i + 1]);
49 static __u8 *va_logical_boundary_fixup(struct hid_device *hdev, __u8 *rdesc,
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.
58 rdesc[0] == 0x05 && rdesc[1] == 0x0c &&
59 rdesc[2] == 0x09 && rdesc[3] == 0x01 &&
60 rdesc[6] == 0x19 && rdesc[7] == 0x00 &&
61 rdesc[11] == 0x16 && rdesc[12] == 0x3c && rdesc[13] == 0x02) {
63 "fixing up varmilo VA104M consumer control report descriptor\n");
70 static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
73 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
75 if (quirks & CP_RDESC_SWAPPED_MIN_MAX)
76 rdesc = cp_rdesc_fixup(hdev, rdesc, rsize);
77 if (quirks & VA_INVAL_LOGICAL_BOUNDARY)
78 rdesc = va_logical_boundary_fixup(hdev, rdesc, rsize);
83 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)
87 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
89 if (!(quirks & CP_2WHEEL_MOUSE_HACK))
92 if (usage->type == EV_REL && usage->code == REL_WHEEL)
93 set_bit(REL_HWHEEL, *bit);
94 if (usage->hid == 0x00090005)
100 static int cp_event(struct hid_device *hdev, struct hid_field *field,
101 struct hid_usage *usage, __s32 value)
103 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
105 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
106 !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK))
109 if (usage->hid == 0x00090005) {
111 quirks |= CP_2WHEEL_MOUSE_HACK_ON;
113 quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
114 hid_set_drvdata(hdev, (void *)quirks);
118 if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
119 struct input_dev *input = field->hidinput->input;
121 input_event(input, usage->type, REL_HWHEEL, value);
128 static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id)
130 unsigned long quirks = id->driver_data;
133 hid_set_drvdata(hdev, (void *)quirks);
135 ret = hid_parse(hdev);
137 hid_err(hdev, "parse failed\n");
141 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
143 hid_err(hdev, "hw start failed\n");
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 },
167 MODULE_DEVICE_TABLE(hid, cp_devices);
169 static struct hid_driver cp_driver = {
171 .id_table = cp_devices,
172 .report_fixup = cp_report_fixup,
173 .input_mapped = cp_input_mapped,
177 module_hid_driver(cp_driver);
179 MODULE_LICENSE("GPL");