121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* u_os_desc.h
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*
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* Utility definitions for "OS Descriptors" support
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*
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* Copyright (c) 2014 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
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*/
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#ifndef __U_OS_DESC_H__
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#define __U_OS_DESC_H__
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#include <asm/unaligned.h>
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#include <linux/nls.h>
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#define USB_EXT_PROP_DW_SIZE 0
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#define USB_EXT_PROP_DW_PROPERTY_DATA_TYPE 4
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#define USB_EXT_PROP_W_PROPERTY_NAME_LENGTH 8
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#define USB_EXT_PROP_B_PROPERTY_NAME 10
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#define USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH 10
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#define USB_EXT_PROP_B_PROPERTY_DATA 14
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#define USB_EXT_PROP_RESERVED 0
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#define USB_EXT_PROP_UNICODE 1
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#define USB_EXT_PROP_UNICODE_ENV 2
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#define USB_EXT_PROP_BINARY 3
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#define USB_EXT_PROP_LE32 4
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#define USB_EXT_PROP_BE32 5
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#define USB_EXT_PROP_UNICODE_LINK 6
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#define USB_EXT_PROP_UNICODE_MULTI 7
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static inline u8 *__usb_ext_prop_ptr(u8 *buf, size_t offset)
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{
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return buf + offset;
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}
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static inline u8 *usb_ext_prop_size_ptr(u8 *buf)
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{
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return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_SIZE);
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}
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static inline u8 *usb_ext_prop_type_ptr(u8 *buf)
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{
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return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_PROPERTY_DATA_TYPE);
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}
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static inline u8 *usb_ext_prop_name_len_ptr(u8 *buf)
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{
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return __usb_ext_prop_ptr(buf, USB_EXT_PROP_W_PROPERTY_NAME_LENGTH);
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}
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static inline u8 *usb_ext_prop_name_ptr(u8 *buf)
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{
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return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_NAME);
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}
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static inline u8 *usb_ext_prop_data_len_ptr(u8 *buf, size_t off)
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{
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return __usb_ext_prop_ptr(buf,
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USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH + off);
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}
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static inline u8 *usb_ext_prop_data_ptr(u8 *buf, size_t off)
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{
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return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_DATA + off);
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}
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static inline void usb_ext_prop_put_size(u8 *buf, int dw_size)
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{
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put_unaligned_le32(dw_size, usb_ext_prop_size_ptr(buf));
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}
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static inline void usb_ext_prop_put_type(u8 *buf, int type)
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{
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put_unaligned_le32(type, usb_ext_prop_type_ptr(buf));
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}
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static inline int usb_ext_prop_put_name(u8 *buf, const char *name, int pnl)
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{
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int result;
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put_unaligned_le16(pnl, usb_ext_prop_name_len_ptr(buf));
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result = utf8s_to_utf16s(name, strlen(name), UTF16_LITTLE_ENDIAN,
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(wchar_t *) usb_ext_prop_name_ptr(buf), pnl - 2);
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if (result < 0)
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return result;
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put_unaligned_le16(0, &buf[USB_EXT_PROP_B_PROPERTY_NAME + pnl - 2]);
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return pnl;
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}
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static inline void usb_ext_prop_put_binary(u8 *buf, int pnl, const u8 *data,
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int data_len)
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{
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put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
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memcpy(usb_ext_prop_data_ptr(buf, pnl), data, data_len);
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}
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static inline int usb_ext_prop_put_unicode(u8 *buf, int pnl, const char *string,
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int data_len)
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{
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int result;
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put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
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result = utf8s_to_utf16s(string, data_len >> 1, UTF16_LITTLE_ENDIAN,
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(wchar_t *) usb_ext_prop_data_ptr(buf, pnl),
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data_len - 2);
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if (result < 0)
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return result;
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put_unaligned_le16(0,
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&buf[USB_EXT_PROP_B_PROPERTY_DATA + pnl + data_len - 2]);
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return data_len;
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}
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#endif /* __U_OS_DESC_H__ */
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