2 * HID driver for some cypress "special" devices
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
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)
19 #include <linux/device.h>
20 #include <linux/hid.h>
21 #include <linux/input.h>
22 #include <linux/module.h>
26 #define CP_RDESC_SWAPPED_MIN_MAX 0x01
27 #define CP_2WHEEL_MOUSE_HACK 0x02
28 #define CP_2WHEEL_MOUSE_HACK_ON 0x04
31 * Some USB barcode readers from cypress have usage min and usage max in
34 static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
37 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
40 if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX))
43 for (i = 0; i < *rsize - 4; i++)
44 if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
50 rdesc[i + 3] = rdesc[i + 1];
56 static 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)
60 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
62 if (!(quirks & CP_2WHEEL_MOUSE_HACK))
65 if (usage->type == EV_REL && usage->code == REL_WHEEL)
66 set_bit(REL_HWHEEL, *bit);
67 if (usage->hid == 0x00090005)
73 static int cp_event(struct hid_device *hdev, struct hid_field *field,
74 struct hid_usage *usage, __s32 value)
76 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
78 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
79 !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK))
82 if (usage->hid == 0x00090005) {
84 quirks |= CP_2WHEEL_MOUSE_HACK_ON;
86 quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
87 hid_set_drvdata(hdev, (void *)quirks);
91 if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
92 struct input_dev *input = field->hidinput->input;
94 input_event(input, usage->type, REL_HWHEEL, value);
101 static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id)
103 unsigned long quirks = id->driver_data;
106 hid_set_drvdata(hdev, (void *)quirks);
108 ret = hid_parse(hdev);
110 hid_err(hdev, "parse failed\n");
114 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
116 hid_err(hdev, "hw start failed\n");
125 static 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_BARCODE_4),
133 .driver_data = CP_RDESC_SWAPPED_MIN_MAX },
134 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
135 .driver_data = CP_2WHEEL_MOUSE_HACK },
138 MODULE_DEVICE_TABLE(hid, cp_devices);
140 static struct hid_driver cp_driver = {
142 .id_table = cp_devices,
143 .report_fixup = cp_report_fixup,
144 .input_mapped = cp_input_mapped,
149 static int __init cp_init(void)
151 return hid_register_driver(&cp_driver);
154 static void __exit cp_exit(void)
156 hid_unregister_driver(&cp_driver);
159 module_init(cp_init);
160 module_exit(cp_exit);
161 MODULE_LICENSE("GPL");