59 lines
1.8 KiB
Diff
59 lines
1.8 KiB
Diff
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diff --git a/drivers/usb/gadget/function/u_f.h b/drivers/usb/gadget/function/u_f.h
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new file mode 100644
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index 0000000..1d5f0eb
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--- /dev/null
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+++ b/drivers/usb/gadget/function/u_f.h
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@@ -0,0 +1,52 @@
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+/*
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+ * u_f.h
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+ *
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+ * Utility definitions for USB functions
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+ *
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+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
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+ * http://www.samsung.com
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+ *
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+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#ifndef __U_F_H__
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+#define __U_F_H__
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+
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+/* Variable Length Array Macros **********************************************/
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+#define vla_group(groupname) size_t groupname##__next = 0
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+#define vla_group_size(groupname) groupname##__next
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+
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+#define vla_item(groupname, type, name, n) \
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+ size_t groupname##_##name##__offset = ({ \
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+ size_t align_mask = __alignof__(type) - 1; \
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+ size_t offset = (groupname##__next + align_mask) & ~align_mask;\
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+ size_t size = (n) * sizeof(type); \
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+ groupname##__next = offset + size; \
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+ offset; \
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+ })
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+
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+#define vla_item_with_sz(groupname, type, name, n) \
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+ size_t groupname##_##name##__sz = (n) * sizeof(type); \
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+ size_t groupname##_##name##__offset = ({ \
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+ size_t align_mask = __alignof__(type) - 1; \
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+ size_t offset = (groupname##__next + align_mask) & ~align_mask;\
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+ size_t size = groupname##_##name##__sz; \
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+ groupname##__next = offset + size; \
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+ offset; \
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+ })
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+
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+#define vla_ptr(ptr, groupname, name) \
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+ ((void *) ((char *)ptr + groupname##_##name##__offset))
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+
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+struct usb_ep;
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+struct usb_request;
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+
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+struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len);
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+
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+#endif /* __U_F_H__ */
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+
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+
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