#ifndef _SYS_IOCCCOM_H_
#define _SYS_IOCCCOM_H_

#define IOCPARM_MASK    0x1fff

#define IOC_VOID        (unsigned long)0x20000000
#define IOC_OUT         (unsigned long)0x40000000
#define IOC_IN          (unsigned long)0x80000000
#define IOC_INOUT       (IOC_IN | IOC_OUT)

#define _IOC(inout,group,num,len)	(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))

#define _IO(g,n)			_IOC(IOC_VOID,	(g), (n), 0)
#define _IOR(g,n,t)			_IOC(IOC_OUT,	(g), (n), sizeof(t))
#define _IOW(g,n,t)			_IOC(IOC_IN,	(g), (n), sizeof(t))
#define _IOWR(g,n,t)			_IOC(IOC_INOUT, (g), (n), sizeof(t))

#endif /* _SYS_IOCCCOM_H_ */