/*	$OpenBSD: ncr53c9xreg.h,v 1.6 2001/09/27 04:01:42 jason Exp $	*/
/*	$NetBSD: ncr53c9xreg.h,v 1.4 1997/05/17 20:56:55 pk Exp $	*/

/*
 * Copyright (c) 1994 Peter Galbavy.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Peter Galbavy.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Register addresses, relative to some base address
 */

#define	NCR_TCL		0x00		/* RW - Transfer Count Low	*/
#define	NCR_TCM		0x01		/* RW - Transfer Count Mid	*/
#define	NCR_TCH		0x0e		/* RW - Transfer Count High	*/
					/*	NOT on 53C90		*/

#define	NCR_FIFO	0x02		/* RW - FIFO data		*/

#define	NCR_CMD		0x03		/* RW - Command (2 deep)	*/
#define  NCRCMD_DMA	0x80		/*	DMA Bit			*/
#define  NCRCMD_NOP	0x00		/*	No Operation		*/
#define  NCRCMD_FLUSH	0x01		/*	Flush FIFO		*/
#define  NCRCMD_RSTCHIP	0x02		/*	Reset Chip		*/
#define  NCRCMD_RSTSCSI	0x03		/*	Reset SCSI Bus		*/
#define  NCRCMD_RESEL	0x40		/*	Reselect Sequence	*/
#define  NCRCMD_SELNATN	0x41		/*	Select without ATN	*/
#define  NCRCMD_SELATN	0x42		/*	Select with ATN		*/
#define  NCRCMD_SELATNS	0x43		/*	Select with ATN & Stop	*/
#define  NCRCMD_ENSEL	0x44		/*	Enable (Re)Selection	*/
#define  NCRCMD_DISSEL	0x45		/*	Disable (Re)Selection	*/
#define  NCRCMD_SELATN3	0x46		/*	Select with ATN3	*/
#define  NCRCMD_RESEL3	0x47		/*	Reselect3 Sequence	*/
#define  NCRCMD_SNDMSG	0x20		/*	Send Message		*/
#define  NCRCMD_SNDSTAT	0x21		/*	Send Status		*/
#define  NCRCMD_SNDDATA	0x22		/*	Send Data		*/
#define  NCRCMD_DISCSEQ	0x23		/*	Disconnect Sequence	*/
#define  NCRCMD_TERMSEQ	0x24		/*	Terminate Sequence	*/
#define  NCRCMD_TCCS	0x25		/*	Target Command Comp Seq	*/
#define  NCRCMD_DISC	0x27		/*	Disconnect		*/
#define  NCRCMD_RECMSG	0x28		/*	Receive Message		*/
#define  NCRCMD_RECCMD	0x29		/*	Receive Command 	*/
#define  NCRCMD_RECDATA	0x2a		/*	Receive Data		*/
#define  NCRCMD_RECCSEQ	0x2b		/*	Receive Command Sequence*/
#define  NCRCMD_ABORT	0x04		/*	Target Abort DMA	*/
#define  NCRCMD_TRANS	0x10		/*	Transfer Information	*/
#define  NCRCMD_ICCS	0x11		/*	Initiator Cmd Comp Seq 	*/
#define  NCRCMD_MSGOK	0x12		/*	Message Accepted	*/
#define  NCRCMD_TRPAD	0x18		/*	Transfer Pad		*/
#define  NCRCMD_SETATN	0x1a		/*	Set ATN			*/
#define  NCRCMD_RSTATN	0x1b		/*	Reset ATN		*/

#define	NCR_STAT	0x04		/* RO - Status			*/
#define  NCRSTAT_INT	0x80		/*	Interrupt		*/
#define  NCRSTAT_GE	0x40		/*	Gross Error		*/
#define  NCRSTAT_PE	0x20		/*	Parity Error		*/
#define  NCRSTAT_TC	0x10		/*	Terminal Count		*/
#define  NCRSTAT_VGC	0x08		/*	Valid Group Code	*/
#define  NCRSTAT_PHASE	0x07		/*	Phase bits		*/

#define	NCR_SELID	0x04		/* WO - Select/Reselect Bus ID	*/
#define  NCR_BUSID_HME	0x10		/*	XXX HME reselect ID 	*/
#define  NCR_BUSID_HME32 0x40		/*	XXX HME to select more than 16 */

#define	NCR_INTR	0x05		/* RO - Interrupt		*/
#define  NCRINTR_SBR	0x80		/*	SCSI Bus Reset		*/
#define  NCRINTR_ILL	0x40		/*	Illegal Command		*/
#define  NCRINTR_DIS	0x20		/*	Disconnect		*/
#define  NCRINTR_BS	0x10		/*	Bus Service		*/
#define  NCRINTR_FC	0x08		/*	Function Complete	*/
#define  NCRINTR_RESEL	0x04		/*	Reselected		*/
#define  NCRINTR_SELATN	0x02		/*	Select with ATN		*/
#define  NCRINTR_SEL	0x01		/*	Selected		*/

#define	NCR_TIMEOUT	0x05		/* WO - Select/Reselect Timeout */

#define	NCR_STEP	0x06		/* RO - Sequence Step		*/
#define  NCRSTEP_MASK	0x07		/*	the last 3 bits		*/
#define  NCRSTEP_DONE	0x04		/*	command went out	*/

#define	NCR_SYNCTP	0x06		/* WO - Synch Transfer Period	*/
					/*	Default 5 (53C9X)	*/

#define	NCR_FFLAG	0x07		/* RO - FIFO Flags		*/
#define  NCRFIFO_SS	0xe0		/*	Sequence Step (Dup)	*/
#define  NCRFIFO_FF	0x1f		/*	Bytes in FIFO		*/

#define	NCR_SYNCOFF	0x07		/* WO - Synch Offset		*/
					/*	0 = ASYNC		*/
					/*	1 - 15 = SYNC bytes	*/

#define	NCR_CFG1	0x08		/* RW - Configuration #1	*/
#define  NCRCFG1_SLOW	0x80		/*	Slow Cable Mode		*/
#define  NCRCFG1_SRR	0x40		/*	SCSI Reset Rep Int Dis	*/
#define  NCRCFG1_PTEST	0x20		/*	Parity Test Mod		*/
#define  NCRCFG1_PARENB	0x10		/*	Enable Parity Check	*/
#define  NCRCFG1_CTEST	0x08		/*	Enable Chip Test	*/
#define  NCRCFG1_BUSID	0x07		/*	Bus ID			*/

#define	NCR_CCF		0x09		/* WO -	Clock Conversion Factor	*/
					/*	0 = 35.01 - 40Mhz	*/
					/*	NEVER SET TO 1		*/
					/*	2 = 10Mhz		*/
					/*	3 = 10.01 - 15Mhz	*/
					/*	4 = 15.01 - 20Mhz	*/
					/*	5 = 20.01 - 25Mhz	*/
					/*	6 = 25.01 - 30Mhz	*/
					/*	7 = 30.01 - 35Mhz	*/

#define	NCR_TEST	0x0a		/* WO - Test (Chip Test Only)	*/

#define	NCR_CFG2	0x0b		/* RW - Configuration #2	*/
#define	 NCRCFG2_RSVD	0xa0		/*	reserved		*/
#define  NCRCFG2_FE	0x40		/* 	Features Enable		*/
#define  NCRCFG2_DREQ	0x10		/* 	DREQ High Impedance	*/
#define  NCRCFG2_SCSI2	0x08		/* 	SCSI-2 Enable		*/
#define  NCRCFG2_BPA	0x04		/* 	Target Bad Parity Abort	*/
#define  NCRCFG2_RPE	0x02		/* 	Register Parity Error	*/
#define  NCRCFG2_DPE	0x01		/* 	DMA Parity Error	*/
#define  NCRCFG2_HMEFE	0x10		/*	HME feature enable	*/
#define  NCRCFG2_HME32	0x80		/*	HME 32 extended		*/

/* Config #3 only on 53C9X */
#define	NCR_CFG3	0x0c		/* RW - Configuration #3	*/
#define	 NCRCFG3_RSVD	0xe0		/*	reserved		*/
#define  NCRCFG3_IDM	0x10		/*	ID Message Res Check	*/
#define  NCRCFG3_QTE	0x08		/*	Queue Tag Enable	*/
#define  NCRCFG3_CDB	0x04		/*	CDB 10-bytes OK		*/
#define  NCRCFG3_FSCSI	0x02		/*	Fast SCSI		*/
#define  NCRCFG3_FCLK	0x01		/*	Fast Clock (>25Mhz)	*/

/*
 * For some unknown reason, the ESP406/FAS408 looks like every
 * other ncr53c9x, except for configuration #3 register.  At any
 * rate, if you're dealing with these chips, you need to use these
 * defines instead.
 */

/* Config #3 different on ESP406/FAS408 */
#define	NCR_ESPCFG3		0x0c	/* RW - Configuration #3	*/
#define  NCRESPCFG3_IDM		0x80	/*	ID Message Res Check	*/
#define  NCRESPCFG3_QTE		0x40	/*	Queue Tag Enable	*/
#define  NCRESPCFG3_CDB		0x20	/*	CDB 10-bytes OK		*/
#define  NCRESPCFG3_FSCSI	0x10	/*	Fast SCSI		*/
#define	 NCRESPCFG3_SRESB	0x08	/*	Save Residual Byte	*/
#define  NCRESPCFG3_FCLK	0x04	/*	Fast Clock (>25Mhz)	*/
#define	 NCRESPCFG3_ADMA	0x02	/*	Alternate DMA Mode	*/
#define	 NCRESPCFG3_T8M		0x01	/*	Threshold 8 Mode	*/

/* Config #3 also different on NCR53CF9x/FAS216 */
#define	NCR_F9XCFG3		0x0c	/* RW - Configuration #3	*/
#define  NCRF9XCFG3_IDM		0x80	/*	ID Message Res Check	*/
#define  NCRF9XCFG3_QTE		0x40	/*	Queue Tag Enable	*/
#define  NCRF9XCFG3_CDB		0x20	/*	CDB 10-bytes OK		*/
#define  NCRF9XCFG3_FSCSI	0x10	/*	Fast SCSI		*/
#define  NCRF9XCFG3_FCLK	0x08	/*	Fast Clock (>25Mhz)	*/
#define  NCRF9XCFG3_SRESB	0x04	/*	Save Residual Byte	*/
#define  NCRF9XCFG3_ADMA	0x02	/*	Alternate DMA Mode	*/
#define  NCRF9XCFG3_T8M		0x01	/*	Threshold 8 Mode	*/

/* Config #3 on FAS366 */
#define  NCRFASCFG3_OBAUTO	0x80	/*	auto push odd-byte to dma */
#define  NCRFASCFG3_EWIDE	0x40	/*	Enable Wide-SCSI	*/
#define  NCRFASCFG3_IDBIT3	0x20	/*	Bit 3 of HME SCSI-ID	*/
#define  NCRFASCFG3_IDRESCHK	0x10	/*	ID message checking	*/
#define  NCRFASCFG3_QUENB	0x08	/*	3-byte msg support	*/
#define  NCRFASCFG3_CDB10	0x04	/*	group 2 scsi-2 support	*/
#define  NCRFASCFG3_FASTSCSI	0x02	/*	10 MB/S fast scsi mode	*/
#define  NCRFASCFG3_FASTCLK	0x01	/*	fast clock mode		*/

/* Config #4 only on ESP406/FAS408 */
#define	NCR_CFG4	0x0d		/* RW - Configuration #4	*/
#define	 NCRCFG4_CRS1	0x80		/*	Select register set #1	*/
#define	 NCRCFG4_RSVD	0x7b		/*	reserved		*/
#define	 NCRCFG4_ACTNEG	0x04		/*	Active negation		*/

/*
   The following registers are only on the ESP406/FAS408.  The
   documentation refers to them as "Control Register Set #1".
   These are the registers that are visible when bit 7 of 
   register 0x0d is set.  This bit is common to both register sets.
*/

#define	NCR_JMP		0x00		/* RO - Jumper Sense Register	*/
#define  NCRJMP_RSVD	0xc0		/*	reserved		*/
#define  NCRJMP_ROMSZ	0x20		/*	ROM Size 1=16K, 0=32K	*/
#define	 NCRJMP_J4	0x10		/*	Jumper #4		*/
#define	 NCRJMP_J3	0x08		/*	Jumper #3		*/
#define	 NCRJMP_J2	0x04		/*	Jumper #2		*/
#define	 NCRJMP_J1	0x02		/*	Jumper #1		*/
#define	 NCRJMP_J0	0x01		/*	Jumper #0		*/

#define	NCR_PIOFIFO	0x04		/* WO - PIO FIFO, 4 bytes deep	*/

#define NCR_PSTAT	0x08		/* RW - PIO Status Register	*/
#define  NCRPSTAT_PERR	0x80		/*	PIO Error		*/
#define  NCRPSTAT_SIRQ	0x40		/*	Active High of SCSI IRQ */
#define  NCRPSTAT_ATAI	0x20		/*	ATA IRQ			*/
#define  NCRPSTAT_FEMPT	0x10		/*	PIO FIFO Empty		*/
#define  NCRPSTAT_F13	0x08		/*	PIO FIFO 1/3		*/
#define  NCRPSTAT_F23	0x04		/*	PIO FIFO 2/3		*/
#define  NCRPSTAT_FFULL	0x02		/*	PIO FIFO Full		*/
#define  NCRPSTAT_PIOM	0x01		/*	PIO/DMA Mode		*/

#define NCR_PIOI	0x0b		/* RW - PIO Interrupt Enable	*/
#define	 NCRPIOI_RSVD	0xe0		/*	reserved		*/
#define	 NCRPIOI_EMPTY	0x10		/*	IRQ When Empty		*/
#define	 NCRPIOI_13	0x08		/*	IRQ When 1/3		*/
#define	 NCRPIOI_23	0x04		/*	IRQ When 2/3		*/
#define	 NCRPIOI_FULL	0x02		/*	IRQ When Full		*/
#define	 NCRPIOI_FINV	0x01		/*	Flag Invert		*/

#define	NCR_CFG5	0x0d		/* RW - Configuration #5	*/
#define	 NCRCFG5_CRS1	0x80		/*	Select Register Set #1	*/
#define	 NCRCFG5_SRAM	0x40		/*	SRAM Memory Map		*/
#define  NCRCFG5_AADDR	0x20		/*	Auto Address		*/
#define  NCRCFG5_PTRINC	0x10		/*	Pointer Increment	*/
#define  NCRCFG5_LOWPWR	0x08		/*	Low Power Mode		*/
#define  NCRCFG5_SINT	0x04		/*	SCSI Interupt Enable	*/
#define  NCRCFG5_INTP	0x02		/*	INT Polarity		*/
#define  NCRCFG5_AINT	0x01		/*	ATA Interupt Enable	*/

#define	NCR_SIGNTR	0x0e		/* RO - Signature		*/

/* Am53c974 Config #3 */
#define	NCR_AMDCFG3		0x0c	/* RW - Configuration #3	*/
#define	 NCRAMDCFG3_IDM		0x80	/*	ID Message Res Check	*/
#define	 NCRAMDCFG3_QTE		0x40	/*	Queue Tag Enable	*/
#define	 NCRAMDCFG3_CDB		0x20	/*	CDB 10-bytes OK		*/
#define	 NCRAMDCFG3_FSCSI	0x10	/*	Fast SCSI		*/
#define	 NCRAMDCFG3_FCLK	0x08	/*	Fast Clock (40MHz)	*/
#define	 NCRAMDCFG3_RSVD	0x07	/*	Reserved		*/

/* Am53c974 Config #4 */
#define	NCR_AMDCFG4		0x0d	/* RW - Configuration #4	*/
#define	 NCRAMDCFG4_GE		0xc0	/*	Glitch Eater		*/
#define	 NCRAMDCFG4_GE12NS	0x00	/*	Signal window 12ns	*/
#define	 NCRAMDCFG4_GE25NS	0x80	/*	Signal window 25ns	*/
#define	 NCRAMDCFG4_GE35NS	0x40	/*	Signal window 35ns	*/
#define	 NCRAMDCFG4_GE0NS	0xc0	/*	Signal window 0ns	*/
#define	 NCRAMDCFG4_PWD		0x20	/*	Reduced power feature	*/
#define	 NCRAMDCFG4_RSVD	0x13	/*	Reserved		*/
#define	 NCRAMDCFG4_RAE		0x08	/*	Active neg. REQ/ACK	*/
#define	 NCRAMDCFG4_RADE	0x04	/*	Active neg. REQ/ACK/DAT	*/

/*
 * FAS366
 */
#define	NCR_RCL		NCR_TCH	/* Recommand counter low */
#define	NCR_RCH		0xf	/* Recommand counter high */
#define	NCR_UID		NCR_RCL	/* fas366 part-uniq id */

/* status register #2 definitions (read only) */
#define NCR_STAT2	NCR_CCF
#define  FAS_STAT2_SEQCNT	0x01	/* Sequence counter bit 7-3 enabled */
#define  FAS_STAT2_FLATCHED	0x02	/* FIFO flags register latched */
#define  FAS_STAT2_CLATCHED	0x04	/* Xfer cntr & recommand ctr latched */
#define  FAS_STAT2_CACTIVE	0x08	/* Command register is active */
#define  FAS_STAT2_SCSI16	0x10	/* SCSI interface is wide */
#define  FAS_STAT2_ISHUTTLE	0x20	/* FIFO Top register contains 1 byte */
#define  FAS_STAT2_OSHUTTLE	0x40	/* next byte from FIFO is MSB */
#define  FAS_STAT2_EMPTY	0x80	/* FIFO is empty */