#sccs	"@(#)uts/kern/sys:gdioctl.h	1.3"


/*	Convergent Technologies - System V - May 1983	*/

#ifndef gdioctl_h
#define gdioctl_h
#include "sys/gdisk.h"

/*
 * Ioctl control packet
 */
struct gdctl {
	unsigned short	status;	/* status */
	struct gdswprt	params;	/* description of the disk */
	short		dsktyp;	/* the type of disk */
};

#define	GDIOCTYPE	0xff00		/* same as TTY IOCTYPE - identifies
					   type as disk, returns GDIOC */

#define	GDIOC		('G'<<8)
#define	GDGETA		(GDIOC|1)	/* get gdisk structure */
#define	GDSETA		(GDIOC|2)	/* set gdisk structure */
#define	GDFORMAT	(GDIOC|3)	/* format track command */
#define	GDDISMNT	(GDIOC|4)	/* flush buffers ready for removing */
					/* Also turn off floppy light */
#define GDRETRY		(GDIOC|8)	/* turn off/on floppy retries */
#define GDCMD		(GDIOC|9)	/* Direct access to controller */
#define	GDLOCK		(GDIOC|10)	/* 1 = Lock floppy, 0 = Unlock floppy */
					/* GDLOCK implicit when using GDCMD */

/*
 * Disk types
 */
#define	GD_WIN	HD	/* Winchester */
#define	GD_SYQ	SY	/* Second winchester */
#define	GD_FLP	FD	/* Floppy */

/*
 * Status bits
 */
#define VALID_VHB	F_CT_FMT	/* valid vhb has been read */
#define DRV_READY	F_READY		/* the disk is on line */
#define PULLED		F_PULLED	/* the disk was removed without 
						permission last time */

/* The fdrq structure is used by the GDCMD ioctl for "direct" access
 * to the 2797 by user programs. It sits at the head of the data
 * buffer used for the transfer.
 */
struct fdrq
{
	char	cmd;	/* Command byte to 2797.
			 * Recognized commands are:
			 *
			 * 100xxxxx	Read sector
			 * 101xxxxx	Write sector
			 * 1100xxxx	Read address
			 * 1110xxxx	Read track
			 * 1111xxxx	Write track
			 *
			 * Fields marked x are not checked and should
			 * be filled in by the caller according to 
			 * information in the WD2797 data sheet.
			 */

	char	cyl;	/* Cylinder to 2797. Note that on a double sided
			 * floppy a cylinder has 2 tracks. Which of these
			 * tracks is addressed is determined by the SS0
			 * bit in the command byte.
			 * On return this byte holds the 2797 track register
			 * contents after operation completion.
			 */

	char	sec;	/* Sector to 2797.
			 * On return this byte holds the 2797 sector register
			 * contents after operation completion.
			 */

	ushort	count;	/* Byte count for transfer.
			 * The returned counts 14 low order bits holds
			 * the 2s complement of the number of words left
			 * to do of the dma transfer. Bits 15 and 14 are
			 * indeterminate. This means that for a successful
			 * transfer the value should be (xx11)fff.
			 */

	char	stat;	/* Status byte from 2797 */
};

#endif gdioctl_h