drivers/staging/rtl8188eu/include/basic_types.h

/******************************************************************************
 *
 * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 *
 ******************************************************************************/
#ifndef __BASIC_TYPES_H__
#define __BASIC_TYPES_H__

#define SUCCESS	0
#define FAIL	(-1)

#include <linux/types.h>
#define NDIS_OID uint

typedef void (*proc_t)(void *);

#define FIELD_OFFSET(s, field)	((ssize_t)&((s *)(0))->field)

#define MEM_ALIGNMENT_OFFSET	(sizeof(size_t))
#define MEM_ALIGNMENT_PADDING	(sizeof(size_t) - 1)

/* port from fw */
/*  TODO: Macros Below are Sync from SD7-Driver. It is necessary
 * to check correctness */

/*
 *	Call endian free function when
 *		1. Read/write packet content.
 *		2. Before write integer to IO.
 *		3. After read integer from IO.
*/

/* Convert little data endian to host ordering */
#define EF1BYTE(_val)		\
	((u8)(_val))
#define EF2BYTE(_val)		\
	(le16_to_cpu(_val))
#define EF4BYTE(_val)		\
	(le32_to_cpu(_val))

/* Read data from memory */
#define READEF1BYTE(_ptr)	\
	EF1BYTE(*((u8 *)(_ptr)))
/* Read le16 data from memory and convert to host ordering */
#define READEF2BYTE(_ptr)	\
	EF2BYTE(*(_ptr))
#define READEF4BYTE(_ptr)	\
	EF4BYTE(*(_ptr))

/* Write data to memory */
#define WRITEEF1BYTE(_ptr, _val)			\
	do {						\
		(*((u8 *)(_ptr))) = EF1BYTE(_val)	\
	} while (0)
/* Write le data to memory in host ordering */
#define WRITEEF2BYTE(_ptr, _val)			\
	do {						\
		(*((u16 *)(_ptr))) = EF2BYTE(_val)	\
	} while (0)

#define WRITEEF4BYTE(_ptr, _val)			\
	do {						\
		(*((u32 *)(_ptr))) = EF2BYTE(_val)	\
	} while (0)

/* Create a bit mask
 * Examples:
 * BIT_LEN_MASK_32(0) => 0x00000000
 * BIT_LEN_MASK_32(1) => 0x00000001
 * BIT_LEN_MASK_32(2) => 0x00000003
 * BIT_LEN_MASK_32(32) => 0xFFFFFFFF
 */
#define BIT_LEN_MASK_32(__bitlen)	 \
	(0xFFFFFFFF >> (32 - (__bitlen)))
#define BIT_LEN_MASK_16(__bitlen)	 \
	(0xFFFF >> (16 - (__bitlen)))
#define BIT_LEN_MASK_8(__bitlen) \
	(0xFF >> (8 - (__bitlen)))

/* Create an offset bit mask
 * Examples:
 * BIT_OFFSET_LEN_MASK_32(0, 2) => 0x00000003
 * BIT_OFFSET_LEN_MASK_32(16, 2) => 0x00030000
 */
#define BIT_OFFSET_LEN_MASK_32(__bitoffset, __bitlen) \
	(BIT_LEN_MASK_32(__bitlen) << (__bitoffset))
#define BIT_OFFSET_LEN_MASK_16(__bitoffset, __bitlen) \
	(BIT_LEN_MASK_16(__bitlen) << (__bitoffset))
#define BIT_OFFSET_LEN_MASK_8(__bitoffset, __bitlen) \
	(BIT_LEN_MASK_8(__bitlen) << (__bitoffset))

/*Description:
 * Return 4-byte value in host byte ordering from
 * 4-byte pointer in little-endian system.
 */
#define LE_P4BYTE_TO_HOST_4BYTE(__pstart) \
	(EF4BYTE(*((__le32 *)(__pstart))))
#define LE_P2BYTE_TO_HOST_2BYTE(__pstart) \
	(EF2BYTE(*((__le16 *)(__pstart))))
#define LE_P1BYTE_TO_HOST_1BYTE(__pstart) \
	(EF1BYTE(*((u8 *)(__pstart))))

/*Description:
Translate subfield (continuous bits in little-endian) of 4-byte
value to host byte ordering.*/
#define LE_BITS_TO_4BYTE(__pstart, __bitoffset, __bitlen) \
	( \
		(LE_P4BYTE_TO_HOST_4BYTE(__pstart) >> (__bitoffset))  & \
		BIT_LEN_MASK_32(__bitlen) \
	)
#define LE_BITS_TO_2BYTE(__pstart, __bitoffset, __bitlen) \
	( \
		(LE_P2BYTE_TO_HOST_2BYTE(__pstart) >> (__bitoffset)) & \
		BIT_LEN_MASK_16(__bitlen) \
	)
#define LE_BITS_TO_1BYTE(__pstart, __bitoffset, __bitlen) \
	( \
		(LE_P1BYTE_TO_HOST_1BYTE(__pstart) >> (__bitoffset)) & \
		BIT_LEN_MASK_8(__bitlen) \
	)

/* Description:
 * Mask subfield (continuous bits in little-endian) of 4-byte value
 * and return the result in 4-byte value in host byte ordering.
 */
#define LE_BITS_CLEARED_TO_4BYTE(__pstart, __bitoffset, __bitlen) \
	( \
		LE_P4BYTE_TO_HOST_4BYTE(__pstart)  & \
		(~BIT_OFFSET_LEN_MASK_32(__bitoffset, __bitlen)) \
	)
#define LE_BITS_CLEARED_TO_2BYTE(__pstart, __bitoffset, __bitlen) \
	( \
		LE_P2BYTE_TO_HOST_2BYTE(__pstart) & \
		(~BIT_OFFSET_LEN_MASK_16(__bitoffset, __bitlen)) \
	)
#define LE_BITS_CLEARED_TO_1BYTE(__pstart, __bitoffset, __bitlen) \
	( \
		LE_P1BYTE_TO_HOST_1BYTE(__pstart) & \
		(~BIT_OFFSET_LEN_MASK_8(__bitoffset, __bitlen)) \
	)

/* Description:
 * Set subfield of little-endian 4-byte value to specified value.
 */
#define SET_BITS_TO_LE_4BYTE(__pstart, __bitoffset, __bitlen, __val) \
		*((u32 *)(__pstart)) =				\
		(							\
		LE_BITS_CLEARED_TO_4BYTE(__pstart, __bitoffset, __bitlen) | \
		((((u32)__val) & BIT_LEN_MASK_32(__bitlen)) << (__bitoffset)) \
		)

#define SET_BITS_TO_LE_2BYTE(__pstart, __bitoffset, __bitlen, __val) \
		*((u16 *)(__pstart)) =				\
		(						\
		LE_BITS_CLEARED_TO_2BYTE(__pstart, __bitoffset, __bitlen) | \
		((((u16)__val) & BIT_LEN_MASK_16(__bitlen)) << (__bitoffset)) \
		);

#define SET_BITS_TO_LE_1BYTE(__pstart, __bitoffset, __bitlen, __val) \
		*((u8 *)(__pstart)) = EF1BYTE			\
		(						\
		LE_BITS_CLEARED_TO_1BYTE(__pstart, __bitoffset, __bitlen) | \
		((((u8)__val) & BIT_LEN_MASK_8(__bitlen)) << (__bitoffset)) \
		)

/*  Get the N-bytes aligment offset from the current length */
#define	N_BYTE_ALIGMENT(__value, __aligment) ((__aligment == 1) ? \
	(__value) : (((__value + __aligment - 1) / __aligment) * __aligment))

#endif /* __BASIC_TYPES_H__ */