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git01.mediatek.com / filogic / uboot / f182656b2b6c9c532a411c15e77027d16e106d8f / . / drivers / usb / gadget / u_os_desc.h
blob: 4dab4814a360276d48353633996c769c82d9a071 [file] [log] [blame]
Li Jun68bda3a2021-01-25 21:43:49 +0800[diff] [blame]1/*
2 * u_os_desc.h
3 *
4 * Utility definitions for "OS Descriptors" support
5 *
6 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 * http://www.samsung.com
8 *
9 * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16#ifndef __U_OS_DESC_H__
17#define __U_OS_DESC_H__
18
19#include <linux/utf.h>
20
21#define USB_EXT_PROP_DW_SIZE 0
22#define USB_EXT_PROP_DW_PROPERTY_DATA_TYPE 4
23#define USB_EXT_PROP_W_PROPERTY_NAME_LENGTH 8
24#define USB_EXT_PROP_B_PROPERTY_NAME 10
25#define USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH 10
26#define USB_EXT_PROP_B_PROPERTY_DATA 14
27
28#define USB_EXT_PROP_RESERVED 0
29#define USB_EXT_PROP_UNICODE 1
30#define USB_EXT_PROP_UNICODE_ENV 2
31#define USB_EXT_PROP_BINARY 3
32#define USB_EXT_PROP_LE32 4
33#define USB_EXT_PROP_BE32 5
34#define USB_EXT_PROP_UNICODE_LINK 6
35#define USB_EXT_PROP_UNICODE_MULTI 7
36
37static inline u8 *__usb_ext_prop_ptr(u8 *buf, size_t offset)
38{
39 return buf + offset;
40}
41
42static inline u8 *usb_ext_prop_size_ptr(u8 *buf)
43{
44 return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_SIZE);
45}
46
47static inline u8 *usb_ext_prop_type_ptr(u8 *buf)
48{
49 return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_PROPERTY_DATA_TYPE);
50}
51
52static inline u8 *usb_ext_prop_name_len_ptr(u8 *buf)
53{
54 return __usb_ext_prop_ptr(buf, USB_EXT_PROP_W_PROPERTY_NAME_LENGTH);
55}
56
57static inline u8 *usb_ext_prop_name_ptr(u8 *buf)
58{
59 return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_NAME);
60}
61
62static inline u8 *usb_ext_prop_data_len_ptr(u8 *buf, size_t off)
63{
64 return __usb_ext_prop_ptr(buf,
65 USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH + off);
66}
67
68static inline u8 *usb_ext_prop_data_ptr(u8 *buf, size_t off)
69{
70 return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_DATA + off);
71}
72
73static inline void usb_ext_prop_put_size(u8 *buf, int dw_size)
74{
75 put_unaligned_le32(dw_size, usb_ext_prop_size_ptr(buf));
76}
77
78static inline void usb_ext_prop_put_type(u8 *buf, int type)
79{
80 put_unaligned_le32(type, usb_ext_prop_type_ptr(buf));
81}
82
83static inline int usb_ext_prop_put_name(u8 *buf, const char *name, int pnl)
84{
85 int result;
86
87 put_unaligned_le16(pnl, usb_ext_prop_name_len_ptr(buf));
88 memset(usb_ext_prop_name_ptr(buf), 0, 2 * strlen(name));
89 result = utf8_to_utf16le(name, (__le16 *)usb_ext_prop_name_ptr(buf),
90 strlen(name));
91 if (result < 0)
92 return result;
93
94 put_unaligned_le16(0, &buf[USB_EXT_PROP_B_PROPERTY_NAME + pnl - 2]);
95
96 return pnl;
97}
98
99static inline void usb_ext_prop_put_binary(u8 *buf, int pnl, const char *data,
100 int data_len)
101{
102 put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
103 memcpy(usb_ext_prop_data_ptr(buf, pnl), data, data_len);
104}
105
106static inline int usb_ext_prop_put_unicode(u8 *buf, int pnl, const char *string,
107 int data_len)
108{
109 int result;
110 put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
111 memset(usb_ext_prop_data_ptr(buf, pnl), 0, 2 * (data_len >> 1));
112 result = utf8_to_utf16le(string, (__le16 *) usb_ext_prop_data_ptr(buf, pnl),
113 data_len >> 1);
114 if (result < 0)
115 return result;
116
117 put_unaligned_le16(0,
118 &buf[USB_EXT_PROP_B_PROPERTY_DATA + pnl + data_len - 2]);
119
120 return data_len;
121}
122
123#endif /* __U_OS_DESC_H__ */