[SCSI] libsas: execute transport link resets with libata-eh via host workqueue
[linux-2.6.git] / drivers / hid / hid-cypress.c
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  */
34 static __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
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)
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
73 static 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
101 static 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;
121 err_free:
122         return ret;
123 }
124
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_MOUSE),
133                 .driver_data = CP_2WHEEL_MOUSE_HACK },
134         { }
135 };
136 MODULE_DEVICE_TABLE(hid, cp_devices);
137
138 static 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
147 static int __init cp_init(void)
148 {
149         return hid_register_driver(&cp_driver);
150 }
151
152 static void __exit cp_exit(void)
153 {
154         hid_unregister_driver(&cp_driver);
155 }
156
157 module_init(cp_init);
158 module_exit(cp_exit);
159 MODULE_LICENSE("GPL");