#ifndef _AHA152X_H
#define _AHA152X_H

/*
 * $Id: aha152x.h,v 1.2 1994/07/03 13:01:47 root Exp $
 */

#include "../block/blk.h"
#include "scsi.h"
#if defined(__KERNEL__)
#include <asm/io.h>

int        aha152x_detect(Scsi_Host_Template *);
const char *aha152x_info(void);
int        aha152x_command(Scsi_Cmnd *);
int        aha152x_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
int        aha152x_abort(Scsi_Cmnd *);
int        aha152x_reset(Scsi_Cmnd *);
int        aha152x_biosparam(Disk *, int, int*);

/* number of queueable commands
   (unless we support more than 1 cmd_per_lun this should do) */
#define AHA152X_MAXQUEUE	7		

#define AHA152X_REVID "Adaptec 152x SCSI driver; $Revision: 1.2 $"

/* Initial value of Scsi_Host entry */
#define AHA152X       { /* next */		NULL,			    \
			/* name */		AHA152X_REVID, 		    \
			/* detect */		aha152x_detect,             \
			/* release */		NULL,			    \
			/* info */		aha152x_info,               \
			/* command */		aha152x_command,            \
			/* queuecommand */	aha152x_queue,              \
                        /* abort */		aha152x_abort,              \
                        /* reset */		aha152x_reset,              \
                        /* slave_attach */	/* NULL */  0,              \
                        /* bios_param */	aha152x_biosparam,          \
			/* can_queue */		1,                          \
                        /* this_id */		7,                          \
                        /* sg_tablesize */	SG_ALL,                     \
                        /* cmd_per_lun */	1,                          \
                        /* present */		0,                          \
                        /* unchecked_isa_dma */	0,			    \
			/* use_clustering */	DISABLE_CLUSTERING }
#endif


/* port addresses */
#define SCSISEQ		(port_base+0x00)	/* SCSI sequence control */
#define SXFRCTL0	(port_base+0x01)	/* SCSI transfer control 0 */
#define SXFRCTL1	(port_base+0x02)	/* SCSI transfer control 1 */
#define SCSISIG		(port_base+0x03)	/* SCSI signal in/out */
#define SCSIRATE	(port_base+0x04)	/* SCSI rate control */
#define SELID		(port_base+0x05)	/* selection/reselection ID */
#define SCSIID		SELID			/* SCSI ID */
#define SCSIDAT		(port_base+0x06)	/* SCSI latched data */
#define SCSIBUS		(port_base+0x07)	/* SCSI data bus */
#define STCNT0		(port_base+0x08)	/* SCSI transfer count 0 */
#define STCNT1		(port_base+0x09)	/* SCSI transfer count 1 */
#define STCNT2		(port_base+0x0a)	/* SCSI transfer count 2 */
#define SSTAT0		(port_base+0x0b)	/* SCSI interrupt status 0 */
#define SSTAT1		(port_base+0x0c)	/* SCSI interrupt status 1 */
#define SSTAT2		(port_base+0x0d)	/* SCSI interrupt status 2 */
#define SCSITEST	(port_base+0x0e)	/* SCSI test control */
#define SSTAT4		(port_base+0x0f)	/* SCSI status 4 */
#define SIMODE0		(port_base+0x10)	/* SCSI interrupt mode 0 */
#define SIMODE1		(port_base+0x11)	/* SCSI interrupt mode 1 */
#define DMACNTRL0	(port_base+0x12)	/* DMA control 0 */
#define DMACNTRL1	(port_base+0x13)	/* DMA control 1 */
#define DMASTAT		(port_base+0x14)	/* DMA status */
#define FIFOSTAT	(port_base+0x15)	/* FIFO status */
#define DATAPORT	(port_base+0x16)	/* DATA port */
#define BRSTCNTRL	(port_base+0x18)	/* burst control */
#define PORTA		(port_base+0x1a)	/* PORT A */
#define PORTB		(port_base+0x1b)	/* PORT B */
#define REV		(port_base+0x1c)	/* revision */
#define STACK		(port_base+0x1d)	/* stack */
#define TEST		(port_base+0x1e)	/* test register */


/* bits and bitmasks to ports */

/* SCSI sequence control */
#define	TEMODEO		0x80
#define ENSELO		0x40
#define ENSELI		0x20
#define ENRESELI	0x10
#define ENAUTOATNO	0x08
#define ENAUTOATNI	0x04
#define ENAUTOATNP	0x02
#define SCSIRSTO	0x01

/* SCSI transfer control 0 */
#define	SCSIEN		0x80
#define DMAEN		0x40
#define CH1		0x20
#define CLRSTCNT	0x10
#define SPIOEN		0x08
#define CLRCH1		0x02

/* SCSI transfer control 1 */
#define	BITBUCKET	0x80
#define SWRAPEN		0x40
#define ENSPCHK		0x20
#define	STIMESEL	0x18	/* mask */
#define STIMESEL_	3
#define ENSTIMER	0x04
#define BYTEALIGN	0x02

/* SCSI signal IN */
#define	CDI		0x80
#define IOI		0x40
#define MSGI		0x20
#define ATNI		0x10
#define SELI		0x08
#define BSYI		0x04
#define REQI		0x02
#define ACKI		0x01

/* SCSI Phases */
#define P_MASK		(MSGI|CDI|IOI)
#define P_DATAO		(0)
#define P_DATAI		(IOI)
#define	P_CMD		(CDI)
#define P_STATUS	(CDI|IOI)
#define P_MSGO		(MSGI|CDI)
#define P_MSGI		(MSGI|CDI|IOI)

/* SCSI signal OUT */
#define	CDO		0x80
#define IOO		0x40
#define MSGO		0x20
#define ATNO		0x10
#define SELO		0x08
#define BSYO		0x04
#define REQO		0x02
#define ACKO		0x01

/* SCSI rate control */
#define SXFR		0x70	/* mask */
#define SXFR_		4
#define SOFS		0x0f	/* mask */

/* SCSI ID */
#define	OID		0x70
#define OID_		4
#define TID		0x07

/* SCSI transfer count */
#define GETSTCNT()   ( (GETPORT(STCNT2)<<16) \
                     + (GETPORT(STCNT1)<< 8) \
                     + GETPORT(STCNT0) )

#define SETSTCNT(X)  { SETPORT(STCNT2, ((X) & 0xFF0000) >> 16); \
                       SETPORT(STCNT1, ((X) & 0x00FF00) >>  8); \
                       SETPORT(STCNT0, ((X) & 0x0000FF) ); }

/* SCSI interrupt status */
#define	TARGET		0x80
#define SELDO		0x40
#define	SELDI		0x20
#define SELINGO		0x10
#define SWRAP		0x08
#define	SDONE		0x04
#define SPIORDY		0x02
#define DMADONE		0x01

#define SETSDONE	0x80
#define CLRSELDO	0x40
#define CLRSELDI	0x20
#define CLRSELINGO	0x10
#define CLRSWRAP	0x08
#define CLRSDONE	0x04
#define CLRSPIORDY	0x02
#define CLRDMADONE	0x01

/* SCSI status 1 */
#define SELTO		0x80
#define ATNTARG		0x40
#define SCSIRSTI	0x20
#define PHASEMIS	0x10
#define BUSFREE		0x08
#define SCSIPERR	0x04
#define PHASECHG	0x02
#define	REQINIT		0x01

#define CLRSELTIMO	0x80
#define CLRATNO		0x40
#define CLRSCSIRSTI	0x20
#define CLRBUSFREE	0x08
#define	CLRSCSIPERR	0x04
#define CLRPHASECHG	0x02
#define CLRREQINIT	0x01

/* SCSI status 2 */
#define SOFFSET		0x20
#define SEMPTY		0x10
#define	SFULL		0x08
#define	SFCNT		0x07	/* mask */

/* SCSI status 3 */
#define	SCSICNT		0xf0	/* mask */
#define	SCSICNT_	4
#define OFFCNT		0x0f	/* mask */

/* SCSI TEST control */
#define	SCTESTU		0x08
#define	SCTESTD		0x04
#define STCTEST		0x01

/* SCSI status 4 */
#define	SYNCERR		0x04
#define FWERR		0x02
#define FRERR		0x01

#define	CLRSYNCERR	0x04
#define CLRFWERR	0x02
#define	CLRFRERR	0x01

/* SCSI interrupt mode 0 */
#define ENSELDO		0x40
#define ENSELDI		0x20
#define ENSELINGO	0x10
#define ENSWRAP		0x08
#define ENSDONE		0x04
#define ENSPIORDY	0x02
#define ENDMADONE	0x01

/* SCSI interrupt mode 1 */
#define	ENSELTIMO	0x80
#define ENATNTARG	0x40
#define ENSCSIRST	0x20
#define ENPHASEMIS	0x10
#define ENBUSFREE	0x08
#define ENSCSIPERR	0x04
#define ENPHASECHG	0x02
#define ENREQINIT	0x01

/* DMA control 0 */
#define ENDMA		0x80
#define _8BIT		0x40
#define	DMA		0x20
#define	WRITE_READ	0x08
#define	INTEN		0x04
#define RSTFIFO		0x02
#define SWINT		0x01

/* DMA control 1 */
#define PWRDWN		0x80
#define STK		0x07	/* mask */

/* DMA status */
#define ATDONE		0x80
#define WORDRDY		0x40
#define INTSTAT		0x20
#define DFIFOFULL	0x10
#define DFIFOEMP	0x08

/* BURST control */
#define BON		0xf0
#define BOFF		0x0f

/* TEST REGISTER */
#define	BOFFTMR		0x40
#define BONTMR		0x20
#define STCNTH		0x10
#define STCNTM		0x08
#define STCNTL		0x04
#define SCSIBLK		0x02
#define DMABLK		0x01

/* On the AHA-152x board PORTA and PORTB contain
   some information about the board's configuration. */
typedef union {
  struct {
    unsigned reserved:2;	/* reserved */
    unsigned tardisc:1;		/* Target disconnect: 0=disabled, 1=enabled */
    unsigned syncneg:1;		/* Initial sync neg: 0=disabled, 1=enabled */
    unsigned msgclasses:2;	/* Message classes
				   0=#4
				   1=#0, #1, #2, #3, #4
				   2=#0, #3, #4
				   3=#0, #4
				*/
    unsigned boot:1;		/* boot: 0=disabled, 1=enabled */
    unsigned dma:1;		/* Transfer mode: 0=PIO; 1=DMA */
    unsigned id:3;		/* SCSI-id */
    unsigned irq:2;		/* IRQ-Channel: 0,3=12, 1=10, 2=11 */
    unsigned dmachan:2;		/* DMA-Channel: 0=0, 1=5, 2=6, 3=7 */
    unsigned parity:1;		/* SCSI-parity: 1=enabled 0=disabled */
  } fields;
  unsigned short port;
} aha152x_config ;

#define cf_parity	fields.parity
#define cf_dmachan	fields.dmachan
#define cf_irq		fields.irq
#define cf_id		fields.id
#define cf_dma		fields.dma
#define cf_boot		fields.boot
#define	cf_msgclasses	fields.msgclasses
#define cf_syncneg	fields.syncneg
#define cf_tardisc	fields.tardisc
#define cf_port		port

/* Some macros to manipulate ports and their bits */

#define SETPORT(PORT, VAL)	\
	outb( (VAL), (PORT) )

#define SETPORTP(PORT, VAL)	\
	outb_p( (VAL), (PORT) )

#define SETPORTW(PORT, VAL)	\
	outw( (VAL), (PORT) )

#define GETPORT(PORT)	\
	inb( PORT )

#define GETPORTW(PORT)	\
	inw( PORT )

#define SETBITS(PORT, BITS)	\
	outb( (inb(PORT) | (BITS)), (PORT) )

#define CLRBITS(PORT, BITS)	\
	outb( (inb(PORT) & ~(BITS)), (PORT) )

#define CLRSETBITS(PORT, CLR, SET)	\
	outb( (inb(PORT) & ~(CLR)) | (SET) , (PORT) )

#define TESTHI(PORT, BITS)	\
	((inb(PORT) & (BITS)) == BITS)

#define TESTLO(PORT, BITS)	\
	((inb(PORT) & (BITS)) == 0)

#endif /* _AHA152X_H */
