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1 /*
2  *  HID driver for some sunplus "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/module.h>
22 
23 #include "hid-ids.h"
24 
sp_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int rsize)25 static void sp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
26 		unsigned int rsize)
27 {
28 	if (rsize >= 107 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
29 			rdesc[106] == 0x03) {
30 		dev_info(&hdev->dev, "fixing up Sunplus Wireless Desktop "
31 				"report descriptor\n");
32 		rdesc[105] = rdesc[110] = 0x03;
33 		rdesc[106] = rdesc[111] = 0x21;
34 	}
35 }
36 
37 #define sp_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
38 		EV_KEY, (c))
sp_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)39 static int sp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
40 		struct hid_field *field, struct hid_usage *usage,
41 		unsigned long **bit, int *max)
42 {
43 	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
44 		return 0;
45 
46 	switch (usage->hid & HID_USAGE) {
47 	case 0x2003: sp_map_key_clear(KEY_ZOOMIN);		break;
48 	case 0x2103: sp_map_key_clear(KEY_ZOOMOUT);	break;
49 	default:
50 		return 0;
51 	}
52 	return 1;
53 }
54 
55 static const struct hid_device_id sp_devices[] = {
56 	{ HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
57 	{ }
58 };
59 MODULE_DEVICE_TABLE(hid, sp_devices);
60 
61 static struct hid_driver sp_driver = {
62 	.name = "sunplus",
63 	.id_table = sp_devices,
64 	.report_fixup = sp_report_fixup,
65 	.input_mapping = sp_input_mapping,
66 };
67 
sp_init(void)68 static int sp_init(void)
69 {
70 	return hid_register_driver(&sp_driver);
71 }
72 
sp_exit(void)73 static void sp_exit(void)
74 {
75 	hid_unregister_driver(&sp_driver);
76 }
77 
78 module_init(sp_init);
79 module_exit(sp_exit);
80 MODULE_LICENSE("GPL");
81 
82 HID_COMPAT_LOAD_DRIVER(sunplus);
83