net: DCB: Validate DCB_ATTR_DCB_BUFFER argument
[linux/fpc-iii.git] / drivers / hid / hid-cypress.c
bloba50ba4a4a1d71be06763f9ec0d23300b303d10d3
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
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>
20 #include "hid-ids.h"
22 #define CP_RDESC_SWAPPED_MIN_MAX 0x01
23 #define CP_2WHEEL_MOUSE_HACK 0x02
24 #define CP_2WHEEL_MOUSE_HACK_ON 0x04
27 * Some USB barcode readers from cypress have usage min and usage max in
28 * the wrong order
30 static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
31 unsigned int *rsize)
33 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
34 unsigned int i;
36 if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX))
37 return rdesc;
39 if (*rsize < 4)
40 return rdesc;
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]);
48 return rdesc;
51 static 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)
55 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
57 if (!(quirks & CP_2WHEEL_MOUSE_HACK))
58 return 0;
60 if (usage->type == EV_REL && usage->code == REL_WHEEL)
61 set_bit(REL_HWHEEL, *bit);
62 if (usage->hid == 0x00090005)
63 return -1;
65 return 0;
68 static int cp_event(struct hid_device *hdev, struct hid_field *field,
69 struct hid_usage *usage, __s32 value)
71 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
73 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
74 !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK))
75 return 0;
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;
86 if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
87 struct input_dev *input = field->hidinput->input;
89 input_event(input, usage->type, REL_HWHEEL, value);
90 return 1;
93 return 0;
96 static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id)
98 unsigned long quirks = id->driver_data;
99 int ret;
101 hid_set_drvdata(hdev, (void *)quirks);
103 ret = hid_parse(hdev);
104 if (ret) {
105 hid_err(hdev, "parse failed\n");
106 goto err_free;
109 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
110 if (ret) {
111 hid_err(hdev, "hw start failed\n");
112 goto err_free;
115 return 0;
116 err_free:
117 return ret;
120 static 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 },
133 MODULE_DEVICE_TABLE(hid, cp_devices);
135 static 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,
143 module_hid_driver(cp_driver);
145 MODULE_LICENSE("GPL");