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37a3a533 AP |
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 <asm/unaligned.h> | |
20 | #include <linux/nls.h> | |
21 | ||
22 | #define USB_EXT_PROP_DW_SIZE 0 | |
23 | #define USB_EXT_PROP_DW_PROPERTY_DATA_TYPE 4 | |
24 | #define USB_EXT_PROP_W_PROPERTY_NAME_LENGTH 8 | |
25 | #define USB_EXT_PROP_B_PROPERTY_NAME 10 | |
26 | #define USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH 10 | |
27 | #define USB_EXT_PROP_B_PROPERTY_DATA 14 | |
28 | ||
29 | #define USB_EXT_PROP_RESERVED 0 | |
30 | #define USB_EXT_PROP_UNICODE 1 | |
31 | #define USB_EXT_PROP_UNICODE_ENV 2 | |
32 | #define USB_EXT_PROP_BINARY 3 | |
33 | #define USB_EXT_PROP_LE32 4 | |
34 | #define USB_EXT_PROP_BE32 5 | |
35 | #define USB_EXT_PROP_UNICODE_LINK 6 | |
36 | #define USB_EXT_PROP_UNICODE_MULTI 7 | |
37 | ||
7ea4f088 AP |
38 | static inline u8 *__usb_ext_prop_ptr(u8 *buf, size_t offset) |
39 | { | |
40 | return buf + offset; | |
41 | } | |
42 | ||
43 | static inline u8 *usb_ext_prop_size_ptr(u8 *buf) | |
44 | { | |
45 | return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_SIZE); | |
46 | } | |
47 | ||
48 | static inline u8 *usb_ext_prop_type_ptr(u8 *buf) | |
49 | { | |
50 | return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_PROPERTY_DATA_TYPE); | |
51 | } | |
52 | ||
53 | static inline u8 *usb_ext_prop_name_len_ptr(u8 *buf) | |
54 | { | |
55 | return __usb_ext_prop_ptr(buf, USB_EXT_PROP_W_PROPERTY_NAME_LENGTH); | |
56 | } | |
57 | ||
58 | static inline u8 *usb_ext_prop_name_ptr(u8 *buf) | |
59 | { | |
60 | return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_NAME); | |
61 | } | |
62 | ||
63 | static inline u8 *usb_ext_prop_data_len_ptr(u8 *buf, size_t off) | |
64 | { | |
65 | return __usb_ext_prop_ptr(buf, | |
66 | USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH + off); | |
67 | } | |
68 | ||
69 | static inline u8 *usb_ext_prop_data_ptr(u8 *buf, size_t off) | |
70 | { | |
71 | return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_DATA + off); | |
72 | } | |
73 | ||
37a3a533 AP |
74 | static inline void usb_ext_prop_put_size(u8 *buf, int dw_size) |
75 | { | |
7ea4f088 | 76 | put_unaligned_le32(dw_size, usb_ext_prop_size_ptr(buf)); |
37a3a533 AP |
77 | } |
78 | ||
79 | static inline void usb_ext_prop_put_type(u8 *buf, int type) | |
80 | { | |
7ea4f088 | 81 | put_unaligned_le32(type, usb_ext_prop_type_ptr(buf)); |
37a3a533 AP |
82 | } |
83 | ||
84 | static inline int usb_ext_prop_put_name(u8 *buf, const char *name, int pnl) | |
85 | { | |
86 | int result; | |
87 | ||
7ea4f088 | 88 | put_unaligned_le16(pnl, usb_ext_prop_name_len_ptr(buf)); |
37a3a533 | 89 | result = utf8s_to_utf16s(name, strlen(name), UTF16_LITTLE_ENDIAN, |
7ea4f088 | 90 | (wchar_t *) usb_ext_prop_name_ptr(buf), pnl - 2); |
37a3a533 AP |
91 | if (result < 0) |
92 | return result; | |
93 | ||
7ea4f088 | 94 | put_unaligned_le16(0, &buf[USB_EXT_PROP_B_PROPERTY_NAME + pnl - 2]); |
37a3a533 AP |
95 | |
96 | return pnl; | |
97 | } | |
98 | ||
99 | static inline void usb_ext_prop_put_binary(u8 *buf, int pnl, const u8 *data, | |
100 | int data_len) | |
101 | { | |
7ea4f088 AP |
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); | |
37a3a533 AP |
104 | } |
105 | ||
106 | static inline int usb_ext_prop_put_unicode(u8 *buf, int pnl, const char *string, | |
107 | int data_len) | |
108 | { | |
109 | int result; | |
7ea4f088 | 110 | put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl)); |
37a3a533 | 111 | result = utf8s_to_utf16s(string, data_len >> 1, UTF16_LITTLE_ENDIAN, |
7ea4f088 | 112 | (wchar_t *) usb_ext_prop_data_ptr(buf, pnl), |
37a3a533 AP |
113 | data_len - 2); |
114 | if (result < 0) | |
115 | return result; | |
116 | ||
117 | put_unaligned_le16(0, | |
7ea4f088 | 118 | &buf[USB_EXT_PROP_B_PROPERTY_DATA + pnl + data_len - 2]); |
37a3a533 AP |
119 | |
120 | return data_len; | |
121 | } | |
122 | ||
123 | #endif /* __U_OS_DESC_H__ */ |