1/*
2 * u_f.h
3 *
4 * Utility definitions for USB functions
5 *
6 * Copyright (c) 2013 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_F_H__
17#define __U_F_H__
18
19/* Variable Length Array Macros **********************************************/
20#define vla_group(groupname) size_t groupname##__next = 0
21#define vla_group_size(groupname) groupname##__next
22
23#define vla_item(groupname, type, name, n) \
24	size_t groupname##_##name##__offset = ({			       \
25		size_t align_mask = __alignof__(type) - 1;		       \
26		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
27		size_t size = (n) * sizeof(type);			       \
28		groupname##__next = offset + size;			       \
29		offset;							       \
30	})
31
32#define vla_item_with_sz(groupname, type, name, n) \
33	size_t groupname##_##name##__sz = (n) * sizeof(type);		       \
34	size_t groupname##_##name##__offset = ({			       \
35		size_t align_mask = __alignof__(type) - 1;		       \
36		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
37		size_t size = groupname##_##name##__sz;			       \
38		groupname##__next = offset + size;			       \
39		offset;							       \
40	})
41
42#define vla_ptr(ptr, groupname, name) \
43	((void *) ((char *)ptr + groupname##_##name##__offset))
44
45struct usb_ep;
46struct usb_request;
47
48struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len);
49
50#endif /* __U_F_H__ */
51
52
53