diff --git a/drivers/scsi/aha1740.h b/drivers/scsi/aha1740.h
new file mode 100644
index 0000000..af23fd6
--- /dev/null
+++ b/drivers/scsi/aha1740.h
@@ -0,0 +1,154 @@
+#ifndef _AHA1740_H
+
+/* $Id$
+ *
+ * Header file for the adaptec 1740 driver for Linux
+ *
+ * With minor revisions 3/31/93
+ * Written and (C) 1992,1993 Brad McLean.  See aha1740.c
+ * for more info
+ *
+ */
+
+#include <linux/types.h>
+
+#define SLOTSIZE	0x5c
+
+/* EISA configuration registers & values */
+#define	HID0(base)	(base + 0x0)
+#define	HID1(base)	(base + 0x1)
+#define HID2(base)	(base + 0x2)
+#define	HID3(base)	(base + 0x3)
+#define	EBCNTRL(base)	(base + 0x4)
+#define	PORTADR(base)	(base + 0x40)
+#define BIOSADR(base)	(base + 0x41)
+#define INTDEF(base)	(base + 0x42)
+#define SCSIDEF(base)	(base + 0x43)
+#define BUSDEF(base)	(base + 0x44)
+#define	RESV0(base)	(base + 0x45)
+#define RESV1(base)	(base + 0x46)
+#define	RESV2(base)	(base + 0x47)
+
+#define	HID_MFG	"ADP"
+#define	HID_PRD 0
+#define HID_REV 2
+#define EBCNTRL_VALUE 1
+#define PORTADDR_ENH 0x80
+/* READ */
+#define	G2INTST(base)	(base + 0x56)
+#define G2STAT(base)	(base + 0x57)
+#define	MBOXIN0(base)	(base + 0x58)
+#define	MBOXIN1(base)	(base + 0x59)
+#define	MBOXIN2(base)	(base + 0x5a)
+#define	MBOXIN3(base)	(base + 0x5b)
+#define G2STAT2(base)	(base + 0x5c)
+
+#define G2INTST_MASK		0xf0	/* isolate the status */
+#define	G2INTST_CCBGOOD		0x10	/* CCB Completed */
+#define	G2INTST_CCBRETRY	0x50	/* CCB Completed with a retry */
+#define	G2INTST_HARDFAIL	0x70	/* Adapter Hardware Failure */
+#define	G2INTST_CMDGOOD		0xa0	/* Immediate command success */
+#define G2INTST_CCBERROR	0xc0	/* CCB Completed with error */
+#define	G2INTST_ASNEVENT	0xd0	/* Asynchronous Event Notification */
+#define	G2INTST_CMDERROR	0xe0	/* Immediate command error */
+
+#define G2STAT_MBXOUT	4	/* Mailbox Out Empty Bit */
+#define	G2STAT_INTPEND	2	/* Interrupt Pending Bit */
+#define	G2STAT_BUSY	1	/* Busy Bit (attention pending) */
+
+#define G2STAT2_READY	0	/* Host Ready Bit */
+
+/* WRITE (and ReadBack) */
+#define	MBOXOUT0(base)	(base + 0x50)
+#define	MBOXOUT1(base)	(base + 0x51)
+#define	MBOXOUT2(base)	(base + 0x52)
+#define	MBOXOUT3(base)	(base + 0x53)
+#define	ATTN(base)	(base + 0x54)
+#define G2CNTRL(base)	(base + 0x55)
+
+#define	ATTN_IMMED	0x10	/* Immediate Command */
+#define	ATTN_START	0x40	/* Start CCB */
+#define	ATTN_ABORT	0x50	/* Abort CCB */
+
+#define G2CNTRL_HRST	0x80	/* Hard Reset */
+#define G2CNTRL_IRST	0x40	/* Clear EISA Interrupt */
+#define G2CNTRL_HRDY	0x20	/* Sets HOST ready */
+
+/* This is used with scatter-gather */
+struct aha1740_chain {
+	u32 dataptr;		/* Location of data */
+	u32 datalen;		/* Size of this part of chain */
+};
+
+/* These belong in scsi.h */
+#define any2scsi(up, p)				\
+(up)[0] = (((unsigned long)(p)) >> 16)  ;	\
+(up)[1] = (((unsigned long)(p)) >> 8);		\
+(up)[2] = ((unsigned long)(p));
+
+#define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) )
+
+#define xany2scsi(up, p)	\
+(up)[0] = ((long)(p)) >> 24;	\
+(up)[1] = ((long)(p)) >> 16;	\
+(up)[2] = ((long)(p)) >> 8;	\
+(up)[3] = ((long)(p));
+
+#define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \
+		      + (((long)(up)[2]) <<  8) +  ((long)(up)[3]) )
+
+#define MAX_CDB 12
+#define MAX_SENSE 14
+#define MAX_STATUS 32
+
+struct ecb {			/* Enhanced Control Block 6.1 */
+	u16 cmdw;		/* Command Word */
+	/* Flag Word 1 */
+	u16 cne:1,		/* Control Block Chaining */
+	:6, di:1,		/* Disable Interrupt */
+	:2, ses:1,		/* Suppress Underrun error */
+	:1, sg:1,		/* Scatter/Gather */
+	:1, dsb:1,		/* Disable Status Block */
+	 ars:1;			/* Automatic Request Sense */
+	/* Flag Word 2 */
+	u16 lun:3,		/* Logical Unit */
+	 tag:1,			/* Tagged Queuing */
+	 tt:2,			/* Tag Type */
+	 nd:1,			/* No Disconnect */
+	:1, dat:1,		/* Data transfer - check direction */
+	 dir:1,			/* Direction of transfer 1 = datain */
+	 st:1,			/* Suppress Transfer */
+	 chk:1,			/* Calculate Checksum */
+	:2, rec:1,:1;		/* Error Recovery */
+	u16 nil0;		/* nothing */
+	u32 dataptr;		/* Data or Scatter List ptr */
+	u32 datalen;		/* Data or Scatter List len */
+	u32 statusptr;		/* Status Block ptr */
+	u32 linkptr;		/* Chain Address */
+	u32 nil1;		/* nothing */
+	u32 senseptr;		/* Sense Info Pointer */
+	u8 senselen;		/* Sense Length */
+	u8 cdblen;		/* CDB Length */
+	u16 datacheck;		/* Data checksum */
+	u8 cdb[MAX_CDB];	/* CDB area */
+/* Hardware defined portion ends here, rest is driver defined */
+	u8 sense[MAX_SENSE];	/* Sense area */
+	u8 status[MAX_STATUS];	/* Status area */
+	Scsi_Cmnd *SCpnt;	/* Link to the SCSI Command Block */
+	void (*done) (Scsi_Cmnd *);	/* Completion Function */
+};
+
+#define	AHA1740CMD_NOP	 0x00	/* No OP */
+#define AHA1740CMD_INIT	 0x01	/* Initiator SCSI Command */
+#define AHA1740CMD_DIAG	 0x05	/* Run Diagnostic Command */
+#define AHA1740CMD_SCSI	 0x06	/* Initialize SCSI */
+#define AHA1740CMD_SENSE 0x08	/* Read Sense Information */
+#define AHA1740CMD_DOWN  0x09	/* Download Firmware (yeah, I bet!) */
+#define AHA1740CMD_RINQ  0x0a	/* Read Host Adapter Inquiry Data */
+#define AHA1740CMD_TARG  0x10	/* Target SCSI Command */
+
+#define AHA1740_ECBS 32
+#define AHA1740_SCATTER 16
+#define AHA1740_CMDLUN 1
+
+#endif