1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * u_os_desc.h
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Utility definitions for "OS Descriptors" support
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (c) 2014 Samsung Electronics Co., Ltd.
8*4882a593Smuzhiyun * http://www.samsung.com
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
11*4882a593Smuzhiyun */
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #ifndef __U_OS_DESC_H__
14*4882a593Smuzhiyun #define __U_OS_DESC_H__
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <asm/unaligned.h>
17*4882a593Smuzhiyun #include <linux/nls.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #define USB_EXT_PROP_DW_SIZE 0
20*4882a593Smuzhiyun #define USB_EXT_PROP_DW_PROPERTY_DATA_TYPE 4
21*4882a593Smuzhiyun #define USB_EXT_PROP_W_PROPERTY_NAME_LENGTH 8
22*4882a593Smuzhiyun #define USB_EXT_PROP_B_PROPERTY_NAME 10
23*4882a593Smuzhiyun #define USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH 10
24*4882a593Smuzhiyun #define USB_EXT_PROP_B_PROPERTY_DATA 14
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #define USB_EXT_PROP_RESERVED 0
27*4882a593Smuzhiyun #define USB_EXT_PROP_UNICODE 1
28*4882a593Smuzhiyun #define USB_EXT_PROP_UNICODE_ENV 2
29*4882a593Smuzhiyun #define USB_EXT_PROP_BINARY 3
30*4882a593Smuzhiyun #define USB_EXT_PROP_LE32 4
31*4882a593Smuzhiyun #define USB_EXT_PROP_BE32 5
32*4882a593Smuzhiyun #define USB_EXT_PROP_UNICODE_LINK 6
33*4882a593Smuzhiyun #define USB_EXT_PROP_UNICODE_MULTI 7
34*4882a593Smuzhiyun
__usb_ext_prop_ptr(u8 * buf,size_t offset)35*4882a593Smuzhiyun static inline u8 *__usb_ext_prop_ptr(u8 *buf, size_t offset)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun return buf + offset;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
usb_ext_prop_size_ptr(u8 * buf)40*4882a593Smuzhiyun static inline u8 *usb_ext_prop_size_ptr(u8 *buf)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_SIZE);
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
usb_ext_prop_type_ptr(u8 * buf)45*4882a593Smuzhiyun static inline u8 *usb_ext_prop_type_ptr(u8 *buf)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_PROPERTY_DATA_TYPE);
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
usb_ext_prop_name_len_ptr(u8 * buf)50*4882a593Smuzhiyun static inline u8 *usb_ext_prop_name_len_ptr(u8 *buf)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun return __usb_ext_prop_ptr(buf, USB_EXT_PROP_W_PROPERTY_NAME_LENGTH);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
usb_ext_prop_name_ptr(u8 * buf)55*4882a593Smuzhiyun static inline u8 *usb_ext_prop_name_ptr(u8 *buf)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_NAME);
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
usb_ext_prop_data_len_ptr(u8 * buf,size_t off)60*4882a593Smuzhiyun static inline u8 *usb_ext_prop_data_len_ptr(u8 *buf, size_t off)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun return __usb_ext_prop_ptr(buf,
63*4882a593Smuzhiyun USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH + off);
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun
usb_ext_prop_data_ptr(u8 * buf,size_t off)66*4882a593Smuzhiyun static inline u8 *usb_ext_prop_data_ptr(u8 *buf, size_t off)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_DATA + off);
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
usb_ext_prop_put_size(u8 * buf,int dw_size)71*4882a593Smuzhiyun static inline void usb_ext_prop_put_size(u8 *buf, int dw_size)
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun put_unaligned_le32(dw_size, usb_ext_prop_size_ptr(buf));
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
usb_ext_prop_put_type(u8 * buf,int type)76*4882a593Smuzhiyun static inline void usb_ext_prop_put_type(u8 *buf, int type)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun put_unaligned_le32(type, usb_ext_prop_type_ptr(buf));
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
usb_ext_prop_put_name(u8 * buf,const char * name,int pnl)81*4882a593Smuzhiyun static inline int usb_ext_prop_put_name(u8 *buf, const char *name, int pnl)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun int result;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun put_unaligned_le16(pnl, usb_ext_prop_name_len_ptr(buf));
86*4882a593Smuzhiyun result = utf8s_to_utf16s(name, strlen(name), UTF16_LITTLE_ENDIAN,
87*4882a593Smuzhiyun (wchar_t *) usb_ext_prop_name_ptr(buf), pnl - 2);
88*4882a593Smuzhiyun if (result < 0)
89*4882a593Smuzhiyun return result;
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun put_unaligned_le16(0, &buf[USB_EXT_PROP_B_PROPERTY_NAME + pnl - 2]);
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun return pnl;
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
usb_ext_prop_put_binary(u8 * buf,int pnl,const u8 * data,int data_len)96*4882a593Smuzhiyun static inline void usb_ext_prop_put_binary(u8 *buf, int pnl, const u8 *data,
97*4882a593Smuzhiyun int data_len)
98*4882a593Smuzhiyun {
99*4882a593Smuzhiyun put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
100*4882a593Smuzhiyun memcpy(usb_ext_prop_data_ptr(buf, pnl), data, data_len);
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun
usb_ext_prop_put_unicode(u8 * buf,int pnl,const char * string,int data_len)103*4882a593Smuzhiyun static inline int usb_ext_prop_put_unicode(u8 *buf, int pnl, const char *string,
104*4882a593Smuzhiyun int data_len)
105*4882a593Smuzhiyun {
106*4882a593Smuzhiyun int result;
107*4882a593Smuzhiyun put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
108*4882a593Smuzhiyun result = utf8s_to_utf16s(string, data_len >> 1, UTF16_LITTLE_ENDIAN,
109*4882a593Smuzhiyun (wchar_t *) usb_ext_prop_data_ptr(buf, pnl),
110*4882a593Smuzhiyun data_len - 2);
111*4882a593Smuzhiyun if (result < 0)
112*4882a593Smuzhiyun return result;
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun put_unaligned_le16(0,
115*4882a593Smuzhiyun &buf[USB_EXT_PROP_B_PROPERTY_DATA + pnl + data_len - 2]);
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun return data_len;
118*4882a593Smuzhiyun }
119*4882a593Smuzhiyun
120*4882a593Smuzhiyun #endif /* __U_OS_DESC_H__ */
121