[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-powerpc / ioctl.h

#ifndef _ASM_POWERPC_IOCTL_H
#define _ASM_POWERPC_IOCTL_H


/*
 * this was copied from the alpha as it's a bit cleaner there.
 *                         -- Cort
 */

#define _IOC_NRBITS	8
#define _IOC_TYPEBITS	8
#define _IOC_SIZEBITS	13
#define _IOC_DIRBITS	3

#define _IOC_NRMASK	((1 << _IOC_NRBITS)-1)
#define _IOC_TYPEMASK	((1 << _IOC_TYPEBITS)-1)
#define _IOC_SIZEMASK	((1 << _IOC_SIZEBITS)-1)
#define _IOC_DIRMASK	((1 << _IOC_DIRBITS)-1)

#define _IOC_NRSHIFT	0
#define _IOC_TYPESHIFT	(_IOC_NRSHIFT+_IOC_NRBITS)
#define _IOC_SIZESHIFT	(_IOC_TYPESHIFT+_IOC_TYPEBITS)
#define _IOC_DIRSHIFT	(_IOC_SIZESHIFT+_IOC_SIZEBITS)

/*
 * Direction bits _IOC_NONE could be 0, but OSF/1 gives it a bit.
 * And this turns out useful to catch old ioctl numbers in header
 * files for us.
 */
#define _IOC_NONE	1U
#define _IOC_READ	2U
#define _IOC_WRITE	4U

#define _IOC(dir,type,nr,size) \
	(((dir)  << _IOC_DIRSHIFT) | \
	 ((type) << _IOC_TYPESHIFT) | \
	 ((nr)   << _IOC_NRSHIFT) | \
	 ((size) << _IOC_SIZESHIFT))

/* provoke compile error for invalid uses of size argument */
extern unsigned int __invalid_size_argument_for_IOC;
#define _IOC_TYPECHECK(t) \
	((sizeof(t) == sizeof(t[1]) && \
	  sizeof(t) < (1 << _IOC_SIZEBITS)) ? \
	  sizeof(t) : __invalid_size_argument_for_IOC)

/* used to create numbers */
#define _IO(type,nr)		_IOC(_IOC_NONE,(type),(nr),0)
#define _IOR(type,nr,size)	_IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))
#define _IOW(type,nr,size)	_IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
#define _IOWR(type,nr,size)	_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
#define _IOR_BAD(type,nr,size)	_IOC(_IOC_READ,(type),(nr),sizeof(size))
#define _IOW_BAD(type,nr,size)	_IOC(_IOC_WRITE,(type),(nr),sizeof(size))
#define _IOWR_BAD(type,nr,size)	_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))

/* used to decode them.. */
#define _IOC_DIR(nr)		(((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
#define _IOC_TYPE(nr)		(((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
#define _IOC_NR(nr)		(((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
#define _IOC_SIZE(nr)		(((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)

/* various drivers, such as the pcmcia stuff, need these... */
#define IOC_IN		(_IOC_WRITE << _IOC_DIRSHIFT)
#define IOC_OUT		(_IOC_READ << _IOC_DIRSHIFT)
#define IOC_INOUT	((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
#define IOCSIZE_MASK	(_IOC_SIZEMASK << _IOC_SIZESHIFT)
#define IOCSIZE_SHIFT	(_IOC_SIZESHIFT)

#endif	/* _ASM_POWERPC_IOCTL_H */
Commit	Line	Data
a37c8875	1	#ifndef _ASM_POWERPC_IOCTL_H
a37c8875	2	#define _ASM_POWERPC_IOCTL_H
1da177e4 LT	3
	4
	5	/*
	6	* this was copied from the alpha as it's a bit cleaner there.
	7	* -- Cort
	8	*/
	9
	10	#define _IOC_NRBITS 8
	11	#define _IOC_TYPEBITS 8
	12	#define _IOC_SIZEBITS 13
	13	#define _IOC_DIRBITS 3
	14
	15	#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
	16	#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
	17	#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
	18	#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
	19
	20	#define _IOC_NRSHIFT 0
	21	#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
	22	#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
	23	#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
	24
	25	/*
	26	* Direction bits _IOC_NONE could be 0, but OSF/1 gives it a bit.
	27	* And this turns out useful to catch old ioctl numbers in header
	28	* files for us.
	29	*/
	30	#define _IOC_NONE 1U
	31	#define _IOC_READ 2U
	32	#define _IOC_WRITE 4U
	33
	34	#define _IOC(dir,type,nr,size) \
	35	(((dir) << _IOC_DIRSHIFT) \| \
	36	((type) << _IOC_TYPESHIFT) \| \
	37	((nr) << _IOC_NRSHIFT) \| \
	38	((size) << _IOC_SIZESHIFT))
	39
	40	/* provoke compile error for invalid uses of size argument */
	41	extern unsigned int __invalid_size_argument_for_IOC;
	42	#define _IOC_TYPECHECK(t) \
	43	((sizeof(t) == sizeof(t[1]) && \
	44	sizeof(t) < (1 << _IOC_SIZEBITS)) ? \
	45	sizeof(t) : __invalid_size_argument_for_IOC)
	46
	47	/* used to create numbers */
	48	#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
	49	#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))
	50	#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
	51	#define _IOWR(type,nr,size) _IOC(_IOC_READ\|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
	52	#define _IOR_BAD(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
	53	#define _IOW_BAD(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
	54	#define _IOWR_BAD(type,nr,size) _IOC(_IOC_READ\|_IOC_WRITE,(type),(nr),sizeof(size))
	55
	56	/* used to decode them.. */
	57	#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
	58	#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
	59	#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
	60	#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
	61
	62	/* various drivers, such as the pcmcia stuff, need these... */
	63	#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
	64	#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
	65	#define IOC_INOUT ((_IOC_WRITE\|_IOC_READ) << _IOC_DIRSHIFT)
	66	#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
67	#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
68
a37c8875	69	#endif /* _ASM_POWERPC_IOCTL_H */