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#ifndef __LINUXMT_HDREG_H
#define __LINUXMT_HDREG_H

/* This file contains some defines for the AT-hd-controller. Various sources.
 */

/* ide.c has it's own port definitions in "ide.h" */

/* Hd controller regs. Ref: IBM AT Bios-listing */
#define HD_DATA		0x1f0	/* _CTL when writing */
#define HD_ERROR	0x1f1	/* see err-bits */
#define HD_NSECTOR	0x1f2	/* nr of sectors to read/write */
#define HD_SECTOR	0x1f3	/* starting sector */
#define HD_LCYL		0x1f4	/* starting cylinder */
#define HD_HCYL		0x1f5	/* high byte of starting cyl */
#define HD_CURRENT	0x1f6	/* 101dhhhh , d=drive, hhhh=head */
#define HD_STATUS	0x1f7	/* see status-bits */
#define HD_FEATURE HD_ERROR	/* same io address, read=error, write=feature */
#define HD_PRECOMP HD_FEATURE	/* obsolete use of this port - predates IDE */
#define HD_COMMAND HD_STATUS	/* same io address, read=status, write=cmd */

#define HD_CMD		0x3f6	/* used for resets */
#define HD_ALTSTATUS	0x3f6	/* same as HD_STATUS but doesn't clear irq */

/* remainder is shared between hd.c, ide.c, ide-cd.c, and the hdparm utility */

/* Bits of HD_STATUS */
#define ERR_STAT	0x01
#define INDEX_STAT	0x02
#define ECC_STAT	0x04	/* Corrected error */
#define DRQ_STAT	0x08
#define SEEK_STAT	0x10
#define WRERR_STAT	0x20
#define READY_STAT	0x40
#define BUSY_STAT	0x80

/* Values for HD_COMMAND */
#define WIN_RESTORE		0x10
#define WIN_READ		0x20
#define WIN_WRITE		0x30
#define WIN_VERIFY		0x40
#define WIN_FORMAT		0x50
#define WIN_INIT		0x60
#define WIN_SEEK 		0x70
#define WIN_DIAGNOSE		0x90
#define WIN_SPECIFY		0x91	/* set drive geometry translation */
#define WIN_SETIDLE1		0xE3
#define WIN_SETIDLE2		0x97

#define WIN_DOORLOCK		0xde	/* lock door on removeable drives */
#define WIN_DOORUNLOCK		0xdf	/* unlock door on removeable drives */

#define WIN_MULTREAD		0xC4	/* read sectors using multiple mode */
#define WIN_MULTWRITE		0xC5	/* write sectors using multiple mode */
#define WIN_SETMULT		0xC6	/* enable/disable multiple mode */
#define WIN_IDENTIFY		0xEC	/* ask drive to identify itself */
#define WIN_SETFEATURES		0xEF	/* set special drive features */
#define WIN_READDMA		0xc8	/* read sectors using DMA transfers */
#define WIN_WRITEDMA		0xca	/* write sectors using DMA transfers */

/* Additional drive command codes used by ATAPI devices. */
#define WIN_PIDENTIFY		0xA1	/* identify ATAPI device        */
#define WIN_SRST		0x08	/* ATAPI soft reset command */
#define WIN_PACKETCMD		0xa0	/* Send a packet command. */

/* Bits for HD_ERROR */
#define MARK_ERR	0x01	/* Bad address mark */
#define TRK0_ERR	0x02	/* couldn't find track 0 */
#define ABRT_ERR	0x04	/* Command aborted */
#define ID_ERR		0x10	/* ID field not found */
#define ECC_ERR		0x40	/* Uncorrectable ECC error */
#define	BBD_ERR		0x80	/* block marked bad */

struct hd_geometry {
    unsigned char heads;
    unsigned char sectors;
    unsigned short cylinders;
    unsigned long start;
};

/* hd/ide ctl's that pass (arg) ptrs to user space are numbered 0x030n/0x031n */
#define HDIO_GETGEO		0x0301	/* get device geometry */
#define HDIO_GET_UNMASKINTR	0x0302	/* get current unmask setting */
#define HDIO_GET_NOWERR		0x030a	/* get ignore-write-error flag */

/* hd/ide ctl's that pass (arg) non-ptr values are numbered 0x032n/0x033n */
#define HDIO_SET_UNMASKINTR	0x0322	/* permit other irqs during I/O */
#define HDIO_SET_NOWERR		0x0325	/* change ignore-write-error flag */

#endif
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