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// SPDX-License-Identifier: GPL-2.0
/*
* u_os_desc.h
*
* Utility definitions for "OS Descriptors" support
*
* Copyright (c) 2014 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __U_OS_DESC_H__
#define __U_OS_DESC_H__
#include <asm/unaligned.h>
#include <linux/nls.h>
#define USB_EXT_PROP_DW_SIZE 0
#define USB_EXT_PROP_DW_PROPERTY_DATA_TYPE 4
#define USB_EXT_PROP_W_PROPERTY_NAME_LENGTH 8
#define USB_EXT_PROP_B_PROPERTY_NAME 10
#define USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH 10
#define USB_EXT_PROP_B_PROPERTY_DATA 14
#define USB_EXT_PROP_RESERVED 0
#define USB_EXT_PROP_UNICODE 1
#define USB_EXT_PROP_UNICODE_ENV 2
#define USB_EXT_PROP_BINARY 3
#define USB_EXT_PROP_LE32 4
#define USB_EXT_PROP_BE32 5
#define USB_EXT_PROP_UNICODE_LINK 6
#define USB_EXT_PROP_UNICODE_MULTI 7
static inline u8 *__usb_ext_prop_ptr(u8 *buf, size_t offset)
{
return buf + offset;
}
static inline u8 *usb_ext_prop_size_ptr(u8 *buf)
{
return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_SIZE);
}
static inline u8 *usb_ext_prop_type_ptr(u8 *buf)
{
return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_PROPERTY_DATA_TYPE);
}
static inline u8 *usb_ext_prop_name_len_ptr(u8 *buf)
{
return __usb_ext_prop_ptr(buf, USB_EXT_PROP_W_PROPERTY_NAME_LENGTH);
}
static inline u8 *usb_ext_prop_name_ptr(u8 *buf)
{
return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_NAME);
}
static inline u8 *usb_ext_prop_data_len_ptr(u8 *buf, size_t off)
{
return __usb_ext_prop_ptr(buf,
USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH + off);
}
static inline u8 *usb_ext_prop_data_ptr(u8 *buf, size_t off)
{
return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_DATA + off);
}
static inline void usb_ext_prop_put_size(u8 *buf, int dw_size)
{
put_unaligned_le32(dw_size, usb_ext_prop_size_ptr(buf));
}
static inline void usb_ext_prop_put_type(u8 *buf, int type)
{
put_unaligned_le32(type, usb_ext_prop_type_ptr(buf));
}
static inline int usb_ext_prop_put_name(u8 *buf, const char *name, int pnl)
{
int result;
put_unaligned_le16(pnl, usb_ext_prop_name_len_ptr(buf));
result = utf8s_to_utf16s(name, strlen(name), UTF16_LITTLE_ENDIAN,
(wchar_t *) usb_ext_prop_name_ptr(buf), pnl - 2);
if (result < 0)
return result;
put_unaligned_le16(0, &buf[USB_EXT_PROP_B_PROPERTY_NAME + pnl - 2]);
return pnl;
}
static inline void usb_ext_prop_put_binary(u8 *buf, int pnl, const u8 *data,
int data_len)
{
put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
memcpy(usb_ext_prop_data_ptr(buf, pnl), data, data_len);
}
static inline int usb_ext_prop_put_unicode(u8 *buf, int pnl, const char *string,
int data_len)
{
int result;
put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
result = utf8s_to_utf16s(string, data_len >> 1, UTF16_LITTLE_ENDIAN,
(wchar_t *) usb_ext_prop_data_ptr(buf, pnl),
data_len - 2);
if (result < 0)
return result;
put_unaligned_le16(0,
&buf[USB_EXT_PROP_B_PROPERTY_DATA + pnl + data_len - 2]);
return data_len;
}
#endif /* __U_OS_DESC_H__ */
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