/* Taken from <asm-$foo/ioctl.h> in the Linux kernel sources.
 * The ioctl.h file is pretty similar from one architecture to another.
 * */
#ifndef IO_LINUX_H
#define IO_LINUX_H

/* Hmm.  These constants vary a bit between systems. */
/* (__sh__ includes both sh and sh64) */
#if defined(__i386__) || defined(__sh__)
#define _IOC_NRBITS	8
#define _IOC_TYPEBITS	8
#define _IOC_SIZEBITS	14
#define _IOC_DIRBITS	2

#define _IOC_NONE	0U
#define _IOC_WRITE	1U
#define _IOC_READ	2U
#elif defined(__alpha__) || defined(__sparc__)
#define _IOC_NRBITS	8
#define _IOC_TYPEBITS	8
#define _IOC_SIZEBITS	13
#define _IOC_DIRBITS	2

#define _IOC_NONE        1U
#define _IOC_READ        2U
#define _IOC_WRITE       4U
#else
#error "I don't know the values of the _IOC_* constants for your architecture"
#endif

#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)

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

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

#define RTC_UIE_ON	_IO('p', 0x03)	/* Update int. enable on	*/
#define RTC_UIE_OFF	_IO('p', 0x04)	/* ... off			*/

#define RTC_RD_TIME	_IOR('p', 0x09, struct rtc_time) /* Read RTC time   */
#define RTC_SET_TIME	_IOW('p', 0x0a, struct rtc_time) /* Set RTC time    */

/* From mc146818.h */
#define RTC_UIE 0x10		/* update-finished interrupt enable */

#endif