path: root/drivers/scsi/ncr53c8xx.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/******************************************************************************
**  Device driver for the PCI-SCSI NCR538XX controller family.
**
**  Copyright (C) 1994  Wolfgang Stanglmeier
**  Copyright (C) 1998-2001  Gerard Roudier <groudier@free.fr>
**
**
**-----------------------------------------------------------------------------
**
**  This driver has been ported to Linux from the FreeBSD NCR53C8XX driver
**  and is currently maintained by
**
**          Gerard Roudier              <groudier@free.fr>
**
**  Being given that this driver originates from the FreeBSD version, and
**  in order to keep synergy on both, any suggested enhancements and corrections
**  received on Linux are automatically a potential candidate for the FreeBSD 
**  version.
**
**  The original driver has been written for 386bsd and FreeBSD by
**          Wolfgang Stanglmeier        <wolf@cologne.de>
**          Stefan Esser                <se@mi.Uni-Koeln.de>
**
**  And has been ported to NetBSD by
**          Charles M. Hannum           <mycroft@gnu.ai.mit.edu>
**
**  NVRAM detection and reading.
**    Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
**
**  Added support for MIPS big endian systems.
**    Carsten Langgaard, carstenl@mips.com
**    Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
**
**  Added support for HP PARISC big endian systems.
**    Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
**
*******************************************************************************
*/

#ifndef NCR53C8XX_H
#define NCR53C8XX_H

#include <scsi/scsi_host.h>


/*
**	If you want a driver as small as possible, donnot define the 
**	following options.
*/
#define SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
#define SCSI_NCR_DEBUG_INFO_SUPPORT

/*
**	To disable integrity checking, do not define the 
**	following option.
*/
#ifdef	CONFIG_SCSI_NCR53C8XX_INTEGRITY_CHECK
#	define SCSI_NCR_ENABLE_INTEGRITY_CHECK
#endif

/* ---------------------------------------------------------------------
** Take into account kernel configured parameters.
** Most of these options can be overridden at startup by a command line.
** ---------------------------------------------------------------------
*/

/*
 * For Ultra2 and Ultra3 SCSI support option, use special features. 
 *
 * Value (default) means:
 *	bit 0 : all features enabled, except:
 *		bit 1 : PCI Write And Invalidate.
 *		bit 2 : Data Phase Mismatch handling from SCRIPTS.
 *
 * Use boot options ncr53c8xx=specf:1 if you want all chip features to be 
 * enabled by the driver.
 */
#define	SCSI_NCR_SETUP_SPECIAL_FEATURES		(3)

#define SCSI_NCR_MAX_SYNC			(80)

/*
 * Allow tags from 2 to 256, default 8
 */
#ifdef	CONFIG_SCSI_NCR53C8XX_MAX_TAGS
#if	CONFIG_SCSI_NCR53C8XX_MAX_TAGS < 2
#define SCSI_NCR_MAX_TAGS	(2)
#elif	CONFIG_SCSI_NCR53C8XX_MAX_TAGS > 256
#define SCSI_NCR_MAX_TAGS	(256)
#else
#define	SCSI_NCR_MAX_TAGS	CONFIG_SCSI_NCR53C8XX_MAX_TAGS
#endif
#else
#define SCSI_NCR_MAX_TAGS	(8)
#endif

/*
 * Allow tagged command queuing support if configured with default number 
 * of tags set to max (see above).
 */
#ifdef	CONFIG_SCSI_NCR53C8XX_DEFAULT_TAGS
#define	SCSI_NCR_SETUP_DEFAULT_TAGS	CONFIG_SCSI_NCR53C8XX_DEFAULT_TAGS
#elif	defined CONFIG_SCSI_NCR53C8XX_TAGGED_QUEUE
#define	SCSI_NCR_SETUP_DEFAULT_TAGS	SCSI_NCR_MAX_TAGS
#else
#define	SCSI_NCR_SETUP_DEFAULT_TAGS	(0)
#endif

/*
 * Immediate arbitration
 */
#if defined(CONFIG_SCSI_NCR53C8XX_IARB)
#define SCSI_NCR_IARB_SUPPORT
#endif

/*
 * Sync transfer frequency at startup.
 * Allow from 5Mhz to 80Mhz default 20 Mhz.
 */
#ifndef	CONFIG_SCSI_NCR53C8XX_SYNC
#define	CONFIG_SCSI_NCR53C8XX_SYNC	(20)
#elif	CONFIG_SCSI_NCR53C8XX_SYNC > SCSI_NCR_MAX_SYNC
#undef	CONFIG_SCSI_NCR53C8XX_SYNC
#define	CONFIG_SCSI_NCR53C8XX_SYNC	SCSI_NCR_MAX_SYNC
#endif

#if	CONFIG_SCSI_NCR53C8XX_SYNC == 0
#define	SCSI_NCR_SETUP_DEFAULT_SYNC	(255)
#elif	CONFIG_SCSI_NCR53C8XX_SYNC <= 5
#define	SCSI_NCR_SETUP_DEFAULT_SYNC	(50)
#elif	CONFIG_SCSI_NCR53C8XX_SYNC <= 20
#define	SCSI_NCR_SETUP_DEFAULT_SYNC	(250/(CONFIG_SCSI_NCR53C8XX_SYNC))
#elif	CONFIG_SCSI_NCR53C8XX_SYNC <= 33
#define	SCSI_NCR_SETUP_DEFAULT_SYNC	(11)
#elif	CONFIG_SCSI_NCR53C8XX_SYNC <= 40
#define	SCSI_NCR_SETUP_DEFAULT_SYNC	(10)
#else
#define	SCSI_NCR_SETUP_DEFAULT_SYNC 	(9)
#endif

/*
 * Disallow disconnections at boot-up
 */
#ifdef CONFIG_SCSI_NCR53C8XX_NO_DISCONNECT
#define SCSI_NCR_SETUP_DISCONNECTION	(0)
#else
#define SCSI_NCR_SETUP_DISCONNECTION	(1)
#endif

/*
 * Force synchronous negotiation for all targets
 */
#ifdef CONFIG_SCSI_NCR53C8XX_FORCE_SYNC_NEGO
#define SCSI_NCR_SETUP_FORCE_SYNC_NEGO	(1)
#else
#define SCSI_NCR_SETUP_FORCE_SYNC_NEGO	(0)
#endif

/*
 * Disable master parity checking (flawed hardwares need that)
 */
#ifdef CONFIG_SCSI_NCR53C8XX_DISABLE_MPARITY_CHECK
#define SCSI_NCR_SETUP_MASTER_PARITY	(0)
#else
#define SCSI_NCR_SETUP_MASTER_PARITY	(1)
#endif

/*
 * Disable scsi parity checking (flawed devices may need that)
 */
#ifdef CONFIG_SCSI_NCR53C8XX_DISABLE_PARITY_CHECK
#define SCSI_NCR_SETUP_SCSI_PARITY	(0)
#else
#define SCSI_NCR_SETUP_SCSI_PARITY	(1)
#endif

/*
 * Settle time after reset at boot-up
 */
#define SCSI_NCR_SETUP_SETTLE_TIME	(2)

/*
**	Bridge quirks work-around option defaulted to 1.
*/
#ifndef	SCSI_NCR_PCIQ_WORK_AROUND_OPT
#define	SCSI_NCR_PCIQ_WORK_AROUND_OPT	1
#endif

/*
**	Work-around common bridge misbehaviour.
**
**	- Do not flush posted writes in the opposite 
**	  direction on read.
**	- May reorder DMA writes to memory.
**
**	This option should not affect performances 
**	significantly, so it is the default.
*/
#if	SCSI_NCR_PCIQ_WORK_AROUND_OPT == 1
#define	SCSI_NCR_PCIQ_MAY_NOT_FLUSH_PW_UPSTREAM
#define	SCSI_NCR_PCIQ_MAY_REORDER_WRITES
#define	SCSI_NCR_PCIQ_MAY_MISS_COMPLETIONS

/*
**	Same as option 1, but also deal with 
**	misconfigured interrupts.
**
**	- Edge triggered instead of level sensitive.
**	- No interrupt line connected.
**	- IRQ number misconfigured.
**	
**	If no interrupt is delivered, the driver will 
**	catch the interrupt conditions 10 times per 
**	second. No need to say that this option is 
**	not recommended.
*/
#elif	SCSI_NCR_PCIQ_WORK_AROUND_OPT == 2
#define	SCSI_NCR_PCIQ_MAY_NOT_FLUSH_PW_UPSTREAM
#define	SCSI_NCR_PCIQ_MAY_REORDER_WRITES
#define	SCSI_NCR_PCIQ_MAY_MISS_COMPLETIONS
#define	SCSI_NCR_PCIQ_BROKEN_INTR

/*
**	Some bridge designers decided to flush 
**	everything prior to deliver the interrupt.
**	This option tries to deal with such a 
**	behaviour.
*/
#elif	SCSI_NCR_PCIQ_WORK_AROUND_OPT == 3
#define	SCSI_NCR_PCIQ_SYNC_ON_INTR
#endif

/*
**	Other parameters not configurable with "make config"
**	Avoid to change these constants, unless you know what you are doing.
*/

#define SCSI_NCR_ALWAYS_SIMPLE_TAG
#define SCSI_NCR_MAX_SCATTER	(127)
#define SCSI_NCR_MAX_TARGET	(16)

/*
**   Compute some desirable value for CAN_QUEUE 
**   and CMD_PER_LUN.
**   The driver will use lower values if these 
**   ones appear to be too large.
*/
#define SCSI_NCR_CAN_QUEUE	(8*SCSI_NCR_MAX_TAGS + 2*SCSI_NCR_MAX_TARGET)
#define SCSI_NCR_CMD_PER_LUN	(SCSI_NCR_MAX_TAGS)

#define SCSI_NCR_SG_TABLESIZE	(SCSI_NCR_MAX_SCATTER)
#define SCSI_NCR_TIMER_INTERVAL	(HZ)

#define SCSI_NCR_MAX_LUN	(16)

/*
 *  IO functions definition for big/little endian CPU support.
 *  For now, the NCR is only supported in little endian addressing mode, 
 */

#ifdef	__BIG_ENDIAN

#define	inw_l2b		inw
#define	inl_l2b		inl
#define	outw_b2l	outw
#define	outl_b2l	outl

#define	readb_raw	readb
#define	writeb_raw	writeb

#if defined(SCSI_NCR_BIG_ENDIAN)
#define	readw_l2b	__raw_readw
#define	readl_l2b	__raw_readl
#define	writew_b2l	__raw_writew
#define	writel_b2l	__raw_writel
#define	readw_raw	__raw_readw
#define	readl_raw	__raw_readl
#define	writew_raw	__raw_writew
#define	writel_raw	__raw_writel
#else	/* Other big-endian */
#define	readw_l2b	readw
#define	readl_l2b	readl
#define	writew_b2l	writew
#define	writel_b2l	writel
#define	readw_raw	readw
#define	readl_raw	readl
#define	writew_raw	writew
#define	writel_raw	writel
#endif

#else	/* little endian */

#define	inw_raw		inw
#define	inl_raw		inl
#define	outw_raw	outw
#define	outl_raw	outl

#define	readb_raw	readb
#define	readw_raw	readw
#define	readl_raw	readl
#define	writeb_raw	writeb
#define	writew_raw	writew
#define	writel_raw	writel

#endif

#if !defined(__hppa__) && !defined(__mips__)
#ifdef	SCSI_NCR_BIG_ENDIAN
#error	"The NCR in BIG ENDIAN addressing mode is not (yet) supported"
#endif
#endif

#define MEMORY_BARRIER()	mb()


/*
 *  If the NCR uses big endian addressing mode over the 
 *  PCI, actual io register addresses for byte and word 
 *  accesses must be changed according to lane routing.
 *  Btw, ncr_offb() and ncr_offw() macros only apply to 
 *  constants and so donnot generate bloated code.
 */

#if	defined(SCSI_NCR_BIG_ENDIAN)

#define ncr_offb(o)	(((o)&~3)+((~((o)&3))&3))
#define ncr_offw(o)	(((o)&~3)+((~((o)&3))&2))

#else

#define ncr_offb(o)	(o)
#define ncr_offw(o)	(o)

#endif

/*
 *  If the CPU and the NCR use same endian-ness addressing,
 *  no byte reordering is needed for script patching.
 *  Macro cpu_to_scr() is to be used for script patching.
 *  Macro scr_to_cpu() is to be used for getting a DWORD 
 *  from the script.
 */

#if	defined(__BIG_ENDIAN) && !defined(SCSI_NCR_BIG_ENDIAN)

#define cpu_to_scr(dw)	cpu_to_le32(dw)
#define scr_to_cpu(dw)	le32_to_cpu(dw)

#elif	defined(__LITTLE_ENDIAN) && defined(SCSI_NCR_BIG_ENDIAN)

#define cpu_to_scr(dw)	cpu_to_be32(dw)
#define scr_to_cpu(dw)	be32_to_cpu(dw)

#else

#define cpu_to_scr(dw)	(dw)
#define scr_to_cpu(dw)	(dw)

#endif

/*
 *  Access to the controller chip.
 *
 *  If the CPU and the NCR use same endian-ness addressing,
 *  no byte reordering is needed for accessing chip io 
 *  registers. Functions suffixed by '_raw' are assumed 
 *  to access the chip over the PCI without doing byte 
 *  reordering. Functions suffixed by '_l2b' are 
 *  assumed to perform little-endian to big-endian byte 
 *  reordering, those suffixed by '_b2l' blah, blah,
 *  blah, ...
 */

/*
 *  MEMORY mapped IO input / output
 */

#define INB_OFF(o)		readb_raw((char __iomem *)np->reg + ncr_offb(o))
#define OUTB_OFF(o, val)	writeb_raw((val), (char __iomem *)np->reg + ncr_offb(o))

#if	defined(__BIG_ENDIAN) && !defined(SCSI_NCR_BIG_ENDIAN)

#define INW_OFF(o)		readw_l2b((char __iomem *)np->reg + ncr_offw(o))
#define INL_OFF(o)		readl_l2b((char __iomem *)np->reg + (o))

#define OUTW_OFF(o, val)	writew_b2l((val), (char __iomem *)np->reg + ncr_offw(o))
#define OUTL_OFF(o, val)	writel_b2l((val), (char __iomem *)np->reg + (o))

#elif	defined(__LITTLE_ENDIAN) && defined(SCSI_NCR_BIG_ENDIAN)

#define INW_OFF(o)		readw_b2l((char __iomem *)np->reg + ncr_offw(o))
#define INL_OFF(o)		readl_b2l((char __iomem *)np->reg + (o))

#define OUTW_OFF(o, val)	writew_l2b((val), (char __iomem *)np->reg + ncr_offw(o))
#define OUTL_OFF(o, val)	writel_l2b((val), (char __iomem *)np->reg + (o))

#else

#ifdef CONFIG_SCSI_NCR53C8XX_NO_WORD_TRANSFERS
/* Only 8 or 32 bit transfers allowed */
#define INW_OFF(o)		(readb((char __iomem *)np->reg + ncr_offw(o)) << 8 | readb((char __iomem *)np->reg + ncr_offw(o) + 1))
#else
#define INW_OFF(o)		readw_raw((char __iomem *)np->reg + ncr_offw(o))
#endif
#define INL_OFF(o)		readl_raw((char __iomem *)np->reg + (o))

#ifdef CONFIG_SCSI_NCR53C8XX_NO_WORD_TRANSFERS
/* Only 8 or 32 bit transfers allowed */
#define OUTW_OFF(o, val)	do { writeb((char)((val) >> 8), (char __iomem *)np->reg + ncr_offw(o)); writeb((char)(val), (char __iomem *)np->reg + ncr_offw(o) + 1); } while (0)
#else
#define OUTW_OFF(o, val)	writew_raw((val), (char __iomem *)np->reg + ncr_offw(o))
#endif
#define OUTL_OFF(o, val)	writel_raw((val), (char __iomem *)np->reg + (o))

#endif

#define INB(r)		INB_OFF (offsetof(struct ncr_reg,r))
#define INW(r)		INW_OFF (offsetof(struct ncr_reg,r))
#define INL(r)		INL_OFF (offsetof(struct ncr_reg,r))

#define OUTB(r, val)	OUTB_OFF (offsetof(struct ncr_reg,r), (val))
#define OUTW(r, val)	OUTW_OFF (offsetof(struct ncr_reg,r), (val))
#define OUTL(r, val)	OUTL_OFF (offsetof(struct ncr_reg,r), (val))

/*
 *  Set bit field ON, OFF 
 */

#define OUTONB(r, m)	OUTB(r, INB(r) | (m))
#define OUTOFFB(r, m)	OUTB(r, INB(r) & ~(m))
#define OUTONW(r, m)	OUTW(r, INW(r) | (m))
#define OUTOFFW(r, m)	OUTW(r, INW(r) & ~(m))
#define OUTONL(r, m)	OUTL(r, INL(r) | (m))
#define OUTOFFL(r, m)	OUTL(r, INL(r) & ~(m))

/*
 *  We normally want the chip to have a consistent view
 *  of driver internal data structures when we restart it.
 *  Thus these macros.
 */
#define OUTL_DSP(v)				\
	do {					\
		MEMORY_BARRIER();		\
		OUTL (nc_dsp, (v));		\
	} while (0)

#define OUTONB_STD()				\
	do {					\
		MEMORY_BARRIER();		\
		OUTONB (nc_dcntl, (STD|NOCOM));	\
	} while (0)


/*
**   NCR53C8XX devices features table.
*/
struct ncr_chip {
	unsigned short	revision_id;
	unsigned char	burst_max;	/* log-base-2 of max burst */
	unsigned char	offset_max;
	unsigned char	nr_divisor;
	unsigned int	features;
#define FE_LED0		(1<<0)
#define FE_WIDE		(1<<1)    /* Wide data transfers */
#define FE_ULTRA	(1<<2)	  /* Ultra speed 20Mtrans/sec */
#define FE_DBLR		(1<<4)	  /* Clock doubler present */
#define FE_QUAD		(1<<5)	  /* Clock quadrupler present */
#define FE_ERL		(1<<6)    /* Enable read line */
#define FE_CLSE		(1<<7)    /* Cache line size enable */
#define FE_WRIE		(1<<8)    /* Write & Invalidate enable */
#define FE_ERMP		(1<<9)    /* Enable read multiple */
#define FE_BOF		(1<<10)   /* Burst opcode fetch */
#define FE_DFS		(1<<11)   /* DMA fifo size */
#define FE_PFEN		(1<<12)   /* Prefetch enable */
#define FE_LDSTR	(1<<13)   /* Load/Store supported */
#define FE_RAM		(1<<14)   /* On chip RAM present */
#define FE_VARCLK	(1<<15)   /* SCSI clock may vary */
#define FE_RAM8K	(1<<16)   /* On chip RAM sized 8Kb */
#define FE_64BIT	(1<<17)   /* Have a 64-bit PCI interface */
#define FE_IO256	(1<<18)   /* Requires full 256 bytes in PCI space */
#define FE_NOPM		(1<<19)   /* Scripts handles phase mismatch */
#define FE_LEDC		(1<<20)   /* Hardware control of LED */
#define FE_DIFF		(1<<21)   /* Support Differential SCSI */
#define FE_66MHZ 	(1<<23)   /* 66MHz PCI Support */
#define FE_DAC	 	(1<<24)   /* Support DAC cycles (64 bit addressing) */
#define FE_ISTAT1 	(1<<25)   /* Have ISTAT1, MBOX0, MBOX1 registers */
#define FE_DAC_IN_USE	(1<<26)	  /* Platform does DAC cycles */
#define FE_EHP		(1<<27)   /* 720: Even host parity */
#define FE_MUX		(1<<28)   /* 720: Multiplexed bus */
#define FE_EA		(1<<29)   /* 720: Enable Ack */

#define FE_CACHE_SET	(FE_ERL|FE_CLSE|FE_WRIE|FE_ERMP)
#define FE_SCSI_SET	(FE_WIDE|FE_ULTRA|FE_DBLR|FE_QUAD|F_CLK80)
#define FE_SPECIAL_SET	(FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM)
};


/*
**	Driver setup structure.
**
**	This structure is initialized from linux config options.
**	It can be overridden at boot-up by the boot command line.
*/
#define SCSI_NCR_MAX_EXCLUDES 8
struct ncr_driver_setup {
	u8	master_parity;
	u8	scsi_parity;
	u8	disconnection;
	u8	special_features;
	u8	force_sync_nego;
	u8	reverse_probe;
	u8	pci_fix_up;
	u8	use_nvram;
	u8	verbose;
	u8	default_tags;
	u16	default_sync;
	u16	debug;
	u8	burst_max;
	u8	led_pin;
	u8	max_wide;
	u8	settle_delay;
	u8	diff_support;
	u8	irqm;
	u8	bus_check;
	u8	optimize;
	u8	recovery;
	u8	host_id;
	u16	iarb;
	u32	excludes[SCSI_NCR_MAX_EXCLUDES];
	char	tag_ctrl[100];
};

/*
**	Initial setup.
**	Can be overridden at startup by a command line.
*/
#define SCSI_NCR_DRIVER_SETUP			\
{						\
	SCSI_NCR_SETUP_MASTER_PARITY,		\
	SCSI_NCR_SETUP_SCSI_PARITY,		\
	SCSI_NCR_SETUP_DISCONNECTION,		\
	SCSI_NCR_SETUP_SPECIAL_FEATURES,	\
	SCSI_NCR_SETUP_FORCE_SYNC_NEGO,		\
	0,					\
	0,					\
	1,					\
	0,					\
	SCSI_NCR_SETUP_DEFAULT_TAGS,		\
	SCSI_NCR_SETUP_DEFAULT_SYNC,		\
	0x00,					\
	7,					\
	0,					\
	1,					\
	SCSI_NCR_SETUP_SETTLE_TIME,		\
	0,					\
	0,					\
	1,					\
	0,					\
	0,					\
	255,					\
	0x00					\
}

/*
**	Boot fail safe setup.
**	Override initial setup from boot command line:
**	ncr53c8xx=safe:y
*/
#define SCSI_NCR_DRIVER_SAFE_SETUP		\
{						\
	0,					\
	1,					\
	0,					\
	0,					\
	0,					\
	0,					\
	0,					\
	1,					\
	2,					\
	0,					\
	255,					\
	0x00,					\
	255,					\
	0,					\
	0,					\
	10,					\
	1,					\
	1,					\
	1,					\
	0,					\
	0,					\
	255					\
}

/**************** ORIGINAL CONTENT of ncrreg.h from FreeBSD ******************/

/*-----------------------------------------------------------------
**
**	The ncr 53c810 register structure.
**
**-----------------------------------------------------------------
*/

struct ncr_reg {
/*00*/  u8	nc_scntl0;    /* full arb., ena parity, par->ATN  */

/*01*/  u8	nc_scntl1;    /* no reset                         */
        #define   ISCON   0x10  /* connected to scsi		    */
        #define   CRST    0x08  /* force reset                      */
        #define   IARB    0x02  /* immediate arbitration            */

/*02*/  u8	nc_scntl2;    /* no disconnect expected           */
	#define   SDU     0x80  /* cmd: disconnect will raise error */
	#define   CHM     0x40  /* sta: chained mode                */
	#define   WSS     0x08  /* sta: wide scsi send           [W]*/
	#define   WSR     0x01  /* sta: wide scsi received       [W]*/

/*03*/  u8	nc_scntl3;    /* cnf system clock dependent       */
	#define   EWS     0x08  /* cmd: enable wide scsi         [W]*/
	#define   ULTRA   0x80  /* cmd: ULTRA enable                */
				/* bits 0-2, 7 rsvd for C1010       */

/*04*/  u8	nc_scid;	/* cnf host adapter scsi address    */
	#define   RRE     0x40  /* r/w:e enable response to resel.  */
	#define   SRE     0x20  /* r/w:e enable response to select  */

/*05*/  u8	nc_sxfer;	/* ### Sync speed and count         */
				/* bits 6-7 rsvd for C1010          */

/*06*/  u8	nc_sdid;	/* ### Destination-ID               */

/*07*/  u8	nc_gpreg;	/* ??? IO-Pins                      */

/*08*/  u8	nc_sfbr;	/* ### First byte in phase          */

/*09*/  u8	nc_socl;
	#define   CREQ	  0x80	/* r/w: SCSI-REQ                    */
	#define   CACK	  0x40	/* r/w: SCSI-ACK                    */
	#define   CBSY	  0x20	/* r/w: SCSI-BSY                    */
	#define   CSEL	  0x10	/* r/w: SCSI-SEL                    */
	#define   CATN	  0x08	/* r/w: SCSI-ATN                    */
	#define   CMSG	  0x04	/* r/w: SCSI-MSG                    */
	#define   CC_D	  0x02	/* r/w: SCSI-C_D                    */
	#define   CI_O	  0x01	/* r/w: SCSI-I_O                    */

/*0a*/  u8	nc_ssid;

/*0b*/  u8	nc_sbcl;

/*0c*/  u8	nc_dstat;
        #define   DFE     0x80  /* sta: dma fifo empty              */
        #define   MDPE    0x40  /* int: master data parity error    */
        #define   BF      0x20  /* int: script: bus fault           */
        #define   ABRT    0x10  /* int: script: command aborted     */
        #define   SSI     0x08  /* int: script: single step         */
        #define   SIR     0x04  /* int: script: interrupt instruct. */
        #define   IID     0x01  /* int: script: illegal instruct.   */

/*0d*/  u8	nc_sstat0;
        #define   ILF     0x80  /* sta: data in SIDL register lsb   */
        #define   ORF     0x40  /* sta: data in SODR register lsb   */
        #define   OLF     0x20  /* sta: data in SODL register lsb   */
        #define   AIP     0x10  /* sta: arbitration in progress     */
        #define   LOA     0x08  /* sta: arbitration lost            */
        #define   WOA     0x04  /* sta: arbitration won             */
        #define   IRST    0x02  /* sta: scsi reset signal           */
        #define   SDP     0x01  /* sta: scsi parity signal          */

/*0e*/  u8	nc_sstat1;
	#define   FF3210  0xf0	/* sta: bytes in the scsi fifo      */

/*0f*/  u8	nc_sstat2;
        #define   ILF1    0x80  /* sta: data in SIDL register msb[W]*/
        #define   ORF1    0x40  /* sta: data in SODR register msb[W]*/
        #define   OLF1    0x20  /* sta: data in SODL register msb[W]*/
        #define   DM      0x04  /* sta: DIFFSENS mismatch (895/6 only) */
        #define   LDSC    0x02  /* sta: disconnect & reconnect      */

/*10*/  u8	nc_dsa;	/* --> Base page                    */
/*11*/  u8	nc_dsa1;
/*12*/  u8	nc_dsa2;
/*13*/  u8	nc_dsa3;

/*14*/  u8	nc_istat;	/* --> Main Command and status      */
        #define   CABRT   0x80  /* cmd: abort current operation     */
        #define   SRST    0x40  /* mod: reset chip                  */
        #define   SIGP    0x20  /* r/w: message from host to ncr    */
        #define   SEM     0x10  /* r/w: message between host + ncr  */
        #define   CON     0x08  /* sta: connected to scsi           */
        #define   INTF    0x04  /* sta: int on the fly (reset by wr)*/
        #define   SIP     0x02  /* sta: scsi-interrupt              */
        #define   DIP     0x01  /* sta: host/script interrupt       */

/*15*/  u8	nc_istat1;	/* 896 and later cores only */
        #define   FLSH    0x04  /* sta: chip is flushing            */
        #define   SRUN    0x02  /* sta: scripts are running         */
        #define   SIRQD   0x01  /* r/w: disable INT pin             */

/*16*/  u8	nc_mbox0;	/* 896 and later cores only */
/*17*/  u8	nc_mbox1;	/* 896 and later cores only */

/*18*/	u8	nc_ctest0;
	#define   EHP     0x04	/* 720 even host parity             */
/*19*/  u8	nc_ctest1;

/*1a*/  u8	nc_ctest2;
	#define   CSIGP   0x40
				/* bits 0-2,7 rsvd for C1010        */

/*1b*/  u8	nc_ctest3;
	#define   FLF     0x08  /* cmd: flush dma fifo              */
	#define   CLF	  0x04	/* cmd: clear dma fifo		    */
	#define   FM      0x02  /* mod: fetch pin mode              */
	#define   WRIE    0x01  /* mod: write and invalidate enable */
				/* bits 4-7 rsvd for C1010          */

/*1c*/  u32    nc_temp;	/* ### Temporary stack              */

/*20*/	u8	nc_dfifo;
/*21*/  u8	nc_ctest4;
	#define   MUX     0x80  /* 720 host bus multiplex mode      */
	#define   BDIS    0x80  /* mod: burst disable               */
	#define   MPEE    0x08  /* mod: master parity error enable  */

/*22*/  u8	nc_ctest5;
	#define   DFS     0x20  /* mod: dma fifo size               */
				/* bits 0-1, 3-7 rsvd for C1010          */
/*23*/  u8	nc_ctest6;

/*24*/  u32    nc_dbc;	/* ### Byte count and command       */
/*28*/  u32    nc_dnad;	/* ### Next command register        */
/*2c*/  u32    nc_dsp;	/* --> Script Pointer               */
/*30*/  u32    nc_dsps;	/* --> Script pointer save/opcode#2 */

/*34*/  u8	nc_scratcha;  /* Temporary register a            */
/*35*/  u8	nc_scratcha1;
/*36*/  u8	nc_scratcha2;
/*37*/  u8	nc_scratcha3;

/*38*/  u8	nc_dmode;
	#define   BL_2    0x80  /* mod: burst length shift value +2 */
	#define   BL_1    0x40  /* mod: burst length shift value +1 */
	#define   ERL     0x08  /* mod: enable read line            */
	#define   ERMP    0x04  /* mod: enable read multiple        */
	#define   BOF     0x02  /* mod: burst op code fetch         */

/*39*/  u8	nc_dien;
/*3a*/  u8	nc_sbr;

/*3b*/  u8	nc_dcntl;	/* --> Script execution control     */
	#define   CLSE    0x80  /* mod: cache line size enable      */
	#define   PFF     0x40  /* cmd: pre-fetch flush             */
	#define   PFEN    0x20  /* mod: pre-fetch enable            */
	#define   EA      0x20  /* mod: 720 enable-ack              */
	#define   SSM     0x10  /* mod: single step mode            */
	#define   IRQM    0x08  /* mod: irq mode (1 = totem pole !) */
	#define   STD     0x04  /* cmd: start dma mode              */
	#define   IRQD    0x02  /* mod: irq disable                 */
 	#define	  NOCOM   0x01	/* cmd: protect sfbr while reselect */
				/* bits 0-1 rsvd for C1010          */

/*3c*/  u32	nc_adder;

/*40*/  u16	nc_sien;	/* -->: interrupt enable            */
/*42*/  u16	nc_sist;	/* <--: interrupt status            */
        #define   SBMC    0x1000/* sta: SCSI Bus Mode Change (895/6 only) */
        #define   STO     0x0400/* sta: timeout (select)            */
        #define   GEN     0x0200/* sta: timeout (general)           */
        #define   HTH     0x0100/* sta: timeout (handshake)         */
        #define   MA      0x80  /* sta: phase mismatch              */
        #define   CMP     0x40  /* sta: arbitration complete        */
        #define   SEL     0x20  /* sta: selected by another device  */
        #define   RSL     0x10  /* sta: reselected by another device*/
        #define   SGE     0x08  /* sta: gross error (over/underflow)*/
        #define   UDC     0x04  /* sta: unexpected disconnect       */
        #define   RST     0x02  /* sta: scsi bus reset detected     */
        #define   PAR     0x01  /* sta: scsi parity error           */

/*44*/  u8	nc_slpar;
/*45*/  u8	nc_swide;
/*46*/  u8	nc_macntl;
/*47*/  u8	nc_gpcntl;
/*48*/  u8	nc_stime0;    /* cmd: timeout for select&handshake*/
/*49*/  u8	nc_stime1;    /* cmd: timeout user defined        */
/*4a*/  u16   nc_respid;    /* sta: Reselect-IDs                */

/*4c*/  u8	nc_stest0;

/*4d*/  u8	nc_stest1;
	#define   SCLK    0x80	/* Use the PCI clock as SCSI clock	*/
	#define   DBLEN   0x08	/* clock doubler running		*/
	#define   DBLSEL  0x04	/* clock doubler selected		*/
  

/*4e*/  u8	nc_stest2;
	#define   ROF     0x40	/* reset scsi offset (after gross error!) */
	#define   DIF     0x20  /* 720 SCSI differential mode             */
	#define   EXT     0x02  /* extended filtering                     */

/*4f*/  u8	nc_stest3;
	#define   TE     0x80	/* c: tolerAnt enable */
	#define   HSC    0x20	/* c: Halt SCSI Clock */
	#define   CSF    0x02	/* c: clear scsi fifo */

/*50*/  u16   nc_sidl;	/* Lowlevel: latched from scsi data */
/*52*/  u8	nc_stest4;
	#define   SMODE  0xc0	/* SCSI bus mode      (895/6 only) */
	#define    SMODE_HVD 0x40	/* High Voltage Differential       */
	#define    SMODE_SE  0x80	/* Single Ended                    */
	#define    SMODE_LVD 0xc0	/* Low Voltage Differential        */
	#define   LCKFRQ 0x20	/* Frequency Lock (895/6 only)     */
				/* bits 0-5 rsvd for C1010          */

/*53*/  u8	nc_53_;
/*54*/  u16	nc_sodl;	/* Lowlevel: data out to scsi data  */
/*56*/	u8	nc_ccntl0;	/* Chip Control 0 (896)             */
	#define   ENPMJ  0x80	/* Enable Phase Mismatch Jump       */
	#define   PMJCTL 0x40	/* Phase Mismatch Jump Control      */
	#define   ENNDJ  0x20	/* Enable Non Data PM Jump          */
	#define   DISFC  0x10	/* Disable Auto FIFO Clear          */
	#define   DILS   0x02	/* Disable Internal Load/Store      */
	#define   DPR    0x01	/* Disable Pipe Req                 */

/*57*/	u8	nc_ccntl1;	/* Chip Control 1 (896)             */
	#define   ZMOD   0x80	/* High Impedance Mode              */
	#define	  DIC	 0x10	/* Disable Internal Cycles	    */
	#define   DDAC   0x08	/* Disable Dual Address Cycle       */
	#define   XTIMOD 0x04	/* 64-bit Table Ind. Indexing Mode  */
	#define   EXTIBMV 0x02	/* Enable 64-bit Table Ind. BMOV    */
	#define   EXDBMV 0x01	/* Enable 64-bit Direct BMOV        */

/*58*/  u16	nc_sbdl;	/* Lowlevel: data from scsi data    */
/*5a*/  u16	nc_5a_;

/*5c*/  u8	nc_scr0;	/* Working register B               */
/*5d*/  u8	nc_scr1;	/*                                  */
/*5e*/  u8	nc_scr2;	/*                                  */
/*5f*/  u8	nc_scr3;	/*                                  */

/*60*/  u8	nc_scrx[64];	/* Working register C-R             */
/*a0*/	u32	nc_mmrs;	/* Memory Move Read Selector        */
/*a4*/	u32	nc_mmws;	/* Memory Move Write Selector       */
/*a8*/	u32	nc_sfs;		/* Script Fetch Selector            */
/*ac*/	u32	nc_drs;		/* DSA Relative Selector            */
/*b0*/	u32	nc_sbms;	/* Static Block Move Selector       */
/*b4*/	u32	nc_dbms;	/* Dynamic Block Move Selector      */
/*b8*/	u32	nc_dnad64;	/* DMA Next Address 64              */
/*bc*/	u16	nc_scntl4;	/* C1010 only                       */
	#define   U3EN   0x80	/* Enable Ultra 3                   */
	#define   AIPEN	 0x40   /* Allow check upper byte lanes     */
	#define   XCLKH_DT 0x08 /* Extra clock of data hold on DT
					transfer edge	            */
	#define   XCLKH_ST 0x04 /* Extra clock of data hold on ST
					transfer edge	            */

/*be*/  u8	nc_aipcntl0;	/* Epat Control 1 C1010 only        */
/*bf*/  u8	nc_aipcntl1;	/* AIP Control C1010_66 Only        */

/*c0*/	u32	nc_pmjad1;	/* Phase Mismatch Jump Address 1    */
/*c4*/	u32	nc_pmjad2;	/* Phase Mismatch Jump Address 2    */
/*c8*/	u8	nc_rbc;		/* Remaining Byte Count             */
/*c9*/	u8	nc_rbc1;	/*                                  */
/*ca*/	u8	nc_rbc2;	/*                                  */
/*cb*/	u8	nc_rbc3;	/*                                  */

/*cc*/	u8	nc_ua;		/* Updated Address                  */
/*cd*/	u8	nc_ua1;		/*                                  */
/*ce*/	u8	nc_ua2;		/*                                  */
/*cf*/	u8	nc_ua3;		/*                                  */
/*d0*/	u32	nc_esa;		/* Entry Storage Address            */
/*d4*/	u8	nc_ia;		/* Instruction Address              */
/*d5*/	u8	nc_ia1;
/*d6*/	u8	nc_ia2;
/*d7*/	u8	nc_ia3;
/*d8*/	u32	nc_sbc;		/* SCSI Byte Count (3 bytes only)   */
/*dc*/	u32	nc_csbc;	/* Cumulative SCSI Byte Count       */

				/* Following for C1010 only         */
/*e0*/  u16	nc_crcpad;	/* CRC Value                        */
/*e2*/  u8	nc_crccntl0;	/* CRC control register             */
	#define   SNDCRC  0x10	/* Send CRC Request                 */
/*e3*/  u8	nc_crccntl1;	/* CRC control register             */
/*e4*/  u32	nc_crcdata;	/* CRC data register                */ 
/*e8*/  u32	nc_e8_;		/* rsvd 			    */
/*ec*/  u32	nc_ec_;		/* rsvd 			    */
/*f0*/  u16	nc_dfbc;	/* DMA FIFO byte count              */ 

};

/*-----------------------------------------------------------
**
**	Utility macros for the script.
**
**-----------------------------------------------------------
*/

#define REGJ(p,r) (offsetof(struct ncr_reg, p ## r))
#define REG(r) REGJ (nc_, r)

typedef u32 ncrcmd;

/*-----------------------------------------------------------
**
**	SCSI phases
**
**	DT phases illegal for ncr driver.
**
**-----------------------------------------------------------
*/

#define	SCR_DATA_OUT	0x00000000
#define	SCR_DATA_IN	0x01000000
#define	SCR_COMMAND	0x02000000
#define	SCR_STATUS	0x03000000
#define SCR_DT_DATA_OUT	0x04000000
#define SCR_DT_DATA_IN	0x05000000
#define SCR_MSG_OUT	0x06000000
#define SCR_MSG_IN      0x07000000

#define SCR_ILG_OUT	0x04000000
#define SCR_ILG_IN	0x05000000

/*-----------------------------------------------------------
**
**	Data transfer via SCSI.
**
**-----------------------------------------------------------
**
**	MOVE_ABS (LEN)
**	<<start address>>
**
**	MOVE_IND (LEN)
**	<<dnad_offset>>
**
**	MOVE_TBL
**	<<dnad_offset>>
**
**-----------------------------------------------------------
*/

#define OPC_MOVE          0x08000000

#define SCR_MOVE_ABS(l) ((0x00000000 | OPC_MOVE) | (l))
#define SCR_MOVE_IND(l) ((0x20000000 | OPC_MOVE) | (l))
#define SCR_MOVE_TBL     (0x10000000 | OPC_MOVE)

#define SCR_CHMOV_ABS(l) ((0x00000000) | (l))
#define SCR_CHMOV_IND(l) ((0x20000000) | (l))
#define SCR_CHMOV_TBL     (0x10000000)

struct scr_tblmove {
        u32  size;
        u32  addr;
};

/*-----------------------------------------------------------
**
**	Selection
**
**-----------------------------------------------------------
**
**	SEL_ABS | SCR_ID (0..15)    [ | REL_JMP]
**	<<alternate_address>>
**
**	SEL_TBL | << dnad_offset>>  [ | REL_JMP]
**	<<alternate_address>>
**
**-----------------------------------------------------------
*/

#define	SCR_SEL_ABS	0x40000000
#define	SCR_SEL_ABS_ATN	0x41000000
#define	SCR_SEL_TBL	0x42000000
#define	SCR_SEL_TBL_ATN	0x43000000


#ifdef SCSI_NCR_BIG_ENDIAN
struct scr_tblsel {
        u8	sel_scntl3;
        u8	sel_id;
        u8	sel_sxfer;
        u8	sel_scntl4;	
};
#else
struct scr_tblsel {
        u8	sel_scntl4;	
        u8	sel_sxfer;
        u8	sel_id;
        u8	sel_scntl3;
};
#endif

#define SCR_JMP_REL     0x04000000
#define SCR_ID(id)	(((u32)(id)) << 16)

/*-----------------------------------------------------------
**
**	Waiting for Disconnect or Reselect
**
**-----------------------------------------------------------
**
**	WAIT_DISC
**	dummy: <<alternate_address>>
**
**	WAIT_RESEL
**	<<alternate_address>>
**
**-----------------------------------------------------------
*/

#define	SCR_WAIT_DISC	0x48000000
#define SCR_WAIT_RESEL  0x50000000

/*-----------------------------------------------------------
**
**	Bit Set / Reset
**
**-----------------------------------------------------------
**
**	SET (flags {|.. })
**
**	CLR (flags {|.. })
**
**-----------------------------------------------------------
*/

#define SCR_SET(f)     (0x58000000 | (f))
#define SCR_CLR(f)     (0x60000000 | (f))

#define	SCR_CARRY	0x00000400
#define	SCR_TRG		0x00000200
#define	SCR_ACK		0x00000040
#define	SCR_ATN		0x00000008




/*-----------------------------------------------------------
**
**	Memory to memory move
**
**-----------------------------------------------------------
**
**	COPY (bytecount)
**	<< source_address >>
**	<< destination_address >>
**
**	SCR_COPY   sets the NO FLUSH option by default.
**	SCR_COPY_F does not set this option.
**
**	For chips which do not support this option,
**	ncr_copy_and_bind() will remove this bit.
**-----------------------------------------------------------
*/

#define SCR_NO_FLUSH 0x01000000

#define SCR_COPY(n) (0xc0000000 | SCR_NO_FLUSH | (n))
#define SCR_COPY_F(n) (0xc0000000 | (n))

/*-----------------------------------------------------------
**
**	Register move and binary operations
**
**-----------------------------------------------------------
**
**	SFBR_REG (reg, op, data)        reg  = SFBR op data
**	<< 0 >>
**
**	REG_SFBR (reg, op, data)        SFBR = reg op data
**	<< 0 >>
**
**	REG_REG  (reg, op, data)        reg  = reg op data
**	<< 0 >>
**
**-----------------------------------------------------------
**	On 810A, 860, 825A, 875, 895 and 896 chips the content 
**	of SFBR register can be used as data (SCR_SFBR_DATA).
**	The 896 has additional IO registers starting at 
**	offset 0x80. Bit 7 of register offset is stored in 
**	bit 7 of the SCRIPTS instruction first DWORD.
**-----------------------------------------------------------
*/

#define SCR_REG_OFS(ofs) ((((ofs) & 0x7f) << 16ul) + ((ofs) & 0x80)) 

#define SCR_SFBR_REG(reg,op,data) \
        (0x68000000 | (SCR_REG_OFS(REG(reg))) | (op) | (((data)&0xff)<<8ul))

#define SCR_REG_SFBR(reg,op,data) \
        (0x70000000 | (SCR_REG_OFS(REG(reg))) | (op) | (((data)&0xff)<<8ul))

#define SCR_REG_REG(reg,op,data) \
        (0x78000000 | (SCR_REG_OFS(REG(reg))) | (op) | (((data)&0xff)<<8ul))


#define      SCR_LOAD   0x00000000
#define      SCR_SHL    0x01000000
#define      SCR_OR     0x02000000
#define      SCR_XOR    0x03000000
#define      SCR_AND    0x04000000
#define      SCR_SHR    0x05000000
#define      SCR_ADD    0x06000000
#define      SCR_ADDC   0x07000000

#define      SCR_SFBR_DATA   (0x00800000>>8ul)	/* Use SFBR as data */

/*-----------------------------------------------------------
**
**	FROM_REG (reg)		  SFBR = reg
**	<< 0 >>
**
**	TO_REG	 (reg)		  reg  = SFBR
**	<< 0 >>
**
**	LOAD_REG (reg, data)	  reg  = <data>
**	<< 0 >>
**
**	LOAD_SFBR(data) 	  SFBR = <data>
**	<< 0 >>
**
**-----------------------------------------------------------
*/

#define	SCR_FROM_REG(reg) \
	SCR_REG_SFBR(reg,SCR_OR,0)

#define	SCR_TO_REG(reg) \
	SCR_SFBR_REG(reg,SCR_OR,0)

#define	SCR_LOAD_REG(reg,data) \
	SCR_REG_REG(reg,SCR_LOAD,data)

#define SCR_LOAD_SFBR(data) \
        (SCR_REG_SFBR (gpreg, SCR_LOAD, data))

/*-----------------------------------------------------------
**
**	LOAD  from memory   to register.
**	STORE from register to memory.
**
**	Only supported by 810A, 860, 825A, 875, 895 and 896.
**
**-----------------------------------------------------------
**
**	LOAD_ABS (LEN)
**	<<start address>>
**
**	LOAD_REL (LEN)        (DSA relative)
**	<<dsa_offset>>
**
**-----------------------------------------------------------
*/

#define SCR_REG_OFS2(ofs) (((ofs) & 0xff) << 16ul)
#define SCR_NO_FLUSH2	0x02000000
#define SCR_DSA_REL2	0x10000000

#define SCR_LOAD_R(reg, how, n) \
        (0xe1000000 | how | (SCR_REG_OFS2(REG(reg))) | (n))

#define SCR_STORE_R(reg, how, n) \
        (0xe0000000 | how | (SCR_REG_OFS2(REG(reg))) | (n))

#define SCR_LOAD_ABS(reg, n)	SCR_LOAD_R(reg, SCR_NO_FLUSH2, n)
#define SCR_LOAD_REL(reg, n)	SCR_LOAD_R(reg, SCR_NO_FLUSH2|SCR_DSA_REL2, n)
#define SCR_LOAD_ABS_F(reg, n)	SCR_LOAD_R(reg, 0, n)
#define SCR_LOAD_REL_F(reg, n)	SCR_LOAD_R(reg, SCR_DSA_REL2, n)

#define SCR_STORE_ABS(reg, n)	SCR_STORE_R(reg, SCR_NO_FLUSH2, n)
#define SCR_STORE_REL(reg, n)	SCR_STORE_R(reg, SCR_NO_FLUSH2|SCR_DSA_REL2,n)
#define SCR_STORE_ABS_F(reg, n)	SCR_STORE_R(reg, 0, n)
#define SCR_STORE_REL_F(reg, n)	SCR_STORE_R(reg, SCR_DSA_REL2, n)


/*-----------------------------------------------------------
**
**	Waiting for Disconnect or Reselect
**
**-----------------------------------------------------------
**
**	JUMP            [ | IFTRUE/IFFALSE ( ... ) ]
**	<<address>>
**
**	JUMPR           [ | IFTRUE/IFFALSE ( ... ) ]
**	<<distance>>
**
**	CALL            [ | IFTRUE/IFFALSE ( ... ) ]
**	<<address>>
**
**	CALLR           [ | IFTRUE/IFFALSE ( ... ) ]
**	<<distance>>
**
**	RETURN          [ | IFTRUE/IFFALSE ( ... ) ]
**	<<dummy>>
**
**	INT             [ | IFTRUE/IFFALSE ( ... ) ]
**	<<ident>>
**
**	INT_FLY         [ | IFTRUE/IFFALSE ( ... ) ]
**	<<ident>>
**
**	Conditions:
**	     WHEN (phase)
**	     IF   (phase)
**	     CARRYSET
**	     DATA (data, mask)
**
**-----------------------------------------------------------
*/

#define SCR_NO_OP       0x80000000
#define SCR_JUMP        0x80080000
#define SCR_JUMP64      0x80480000
#define SCR_JUMPR       0x80880000
#define SCR_CALL        0x88080000
#define SCR_CALLR       0x88880000
#define SCR_RETURN      0x90080000
#define SCR_INT         0x98080000
#define SCR_INT_FLY     0x98180000

#define IFFALSE(arg)   (0x00080000 | (arg))
#define IFTRUE(arg)    (0x00000000 | (arg))

#define WHEN(phase)    (0x00030000 | (phase))
#define IF(phase)      (0x00020000 | (phase))

#define DATA(D)        (0x00040000 | ((D) & 0xff))
#define MASK(D,M)      (0x00040000 | (((M ^ 0xff) & 0xff) << 8ul)|((D) & 0xff))

#define CARRYSET       (0x00200000)

/*-----------------------------------------------------------
**
**	SCSI  constants.
**
**-----------------------------------------------------------
*/

/*
 * End of ncrreg from FreeBSD
 */

/*
	Build a scatter/gather entry.
	see sym53c8xx_2/sym_hipd.h for more detailed sym_build_sge()
	implementation ;)
 */

#define ncr_build_sge(np, data, badd, len)	\
do {						\
	(data)->addr = cpu_to_scr(badd);	\
	(data)->size = cpu_to_scr(len);		\
} while (0)

/*==========================================================
**
**	Structures used by the detection routine to transmit 
**	device configuration to the attach function.
**
**==========================================================
*/
struct ncr_slot {
	u_long	base;
	u_long	base_2;
	u_long	base_c;
	u_long	base_2_c;
	void __iomem *base_v;
	void __iomem *base_2_v;
	int	irq;
/* port and reg fields to use INB, OUTB macros */
	volatile struct ncr_reg	__iomem *reg;
};

/*==========================================================
**
**	Structure used by detection routine to save data on 
**	each detected board for attach.
**
**==========================================================
*/
struct ncr_device {
	struct device  *dev;
	struct ncr_slot  slot;
	struct ncr_chip  chip;
	u_char host_id;
	u8 differential;
};

/* To keep track of the dma mapping (sg/single) that has been set */
struct ncr_cmd_priv {
	int	data_mapped;
	int	data_mapping;
};

extern struct Scsi_Host *ncr_attach(struct scsi_host_template *tpnt, int unit, struct ncr_device *device);
extern void ncr53c8xx_release(struct Scsi_Host *host);
irqreturn_t ncr53c8xx_intr(int irq, void *dev_id);
extern int ncr53c8xx_init(void);
extern void ncr53c8xx_exit(void);

#endif /* NCR53C8XX_H */