37507c1bd2
operands that are set during seqeuncer program download instead of at assembly time. Convert the sequencer code to use" downloaded constants" for four run time constants that vary depending on the board type. This frees up 4 bytes of sequencer scratch ram space where these constants used to be stored and also removes the additional instructions required to load their values into the accumulator prior to using them. Remove the REJBYTE sram variable. The host driver can just as easly read the accumulator to get this value. The scratch ram savings is important as the old code used to clober the SCSICONF register on 274X cards which sits near the top of scratch ram space. The SCSICONF register controls bus termination, and clobbering it is not a good thing. Now we have 4 bytes to spare. This should fix the reported problems with cards that don't have devices attached to them failing with a stream of "Somone reset bus X" messages. Doug Ledford determined the cause of the problem, fixes by me.
1115 lines
23 KiB
Reg
1115 lines
23 KiB
Reg
/*
|
|
* Aic7xxx register and scratch ram definitions.
|
|
*
|
|
* Copyright (c) 1994-1997 Justin Gibbs.
|
|
* 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,
|
|
* without modification, immediately at the beginning of the file.
|
|
* 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. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
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|
*
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|
* Where this Software is combined with software released under the terms of
|
|
* the GNU Public License ("GPL") and the terms of the GPL would require the
|
|
* combined work to also be released under the terms of the GPL, the terms
|
|
* and conditions of this License will apply in addition to those of the
|
|
* GPL with the exception of any terms or conditions of this License that
|
|
* conflict with, or are expressly prohibited by, the GPL.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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)
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|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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|
* SUCH DAMAGE.
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|
*
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* $Id: aic7xxx.reg,v 1.5 1997/08/13 17:02:24 gibbs Exp $
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|
*/
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|
|
|
/*
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* This file is processed by the aic7xxx_asm utility for use in assembling
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* firmware for the aic7xxx family of SCSI host adapters as well as to generate
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* a C header file for use in the kernel portion of the Aic7xxx driver.
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|
*
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|
* All page numbers refer to the Adaptec AIC-7770 Data Book available from
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* Adaptec's Technical Documents Department 1-800-934-2766
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*/
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|
|
|
/*
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* SCSI Sequence Control (p. 3-11).
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* Each bit, when set starts a specific SCSI sequence on the bus
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*/
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register SCSISEQ {
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address 0x000
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access_mode RW
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bit TEMODE 0x80
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bit ENSELO 0x40
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bit ENSELI 0x20
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bit ENRSELI 0x10
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bit ENAUTOATNO 0x08
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bit ENAUTOATNI 0x04
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|
bit ENAUTOATNP 0x02
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bit SCSIRSTO 0x01
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}
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|
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/*
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* SCSI Transfer Control 0 Register (pp. 3-13).
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* Controls the SCSI module data path.
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*/
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register SXFRCTL0 {
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address 0x001
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access_mode RW
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bit DFON 0x80
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bit DFPEXP 0x40
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bit FAST20 0x20
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bit CLRSTCNT 0x10
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bit SPIOEN 0x08
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bit SCAMEN 0x04
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bit CLRCHN 0x02
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}
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/*
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* SCSI Transfer Control 1 Register (pp. 3-14,15).
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* Controls the SCSI module data path.
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*/
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register SXFRCTL1 {
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address 0x002
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access_mode RW
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bit BITBUCKET 0x80
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bit SWRAPEN 0x40
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bit ENSPCHK 0x20
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mask STIMESEL 0x18
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bit ENSTIMER 0x04
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bit ACTNEGEN 0x02
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bit STPWEN 0x01 /* Powered Termination */
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}
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|
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/*
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* SCSI Control Signal Read Register (p. 3-15).
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* Reads the actual state of the SCSI bus pins
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*/
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register SCSISIGI {
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address 0x003
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access_mode RO
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bit CDI 0x80
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bit IOI 0x40
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bit MSGI 0x20
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bit ATNI 0x10
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bit SELI 0x08
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bit BSYI 0x04
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bit REQI 0x02
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bit ACKI 0x01
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/*
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* Possible phases in SCSISIGI
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*/
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mask PHASE_MASK CDI|IOI|MSGI
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mask P_DATAOUT 0x00
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mask P_DATAIN IOI
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mask P_COMMAND CDI
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mask P_MESGOUT CDI|MSGI
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mask P_STATUS CDI|IOI
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mask P_MESGIN CDI|IOI|MSGI
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}
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/*
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* SCSI Control Signal Write Register (p. 3-16).
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* Writing to this register modifies the control signals on the bus. Only
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* those signals that are allowed in the current mode (Initiator/Target) are
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* asserted.
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*/
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register SCSISIGO {
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address 0x003
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access_mode WO
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bit CDO 0x80
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bit IOO 0x40
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bit MSGO 0x20
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bit ATNO 0x10
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bit SELO 0x08
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bit BSYO 0x04
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bit REQO 0x02
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bit ACKO 0x01
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/*
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* Possible phases to write into SCSISIG0
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*/
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mask PHASE_MASK CDI|IOI|MSGI
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mask P_DATAOUT 0x00
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mask P_DATAIN IOI
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mask P_COMMAND CDI
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mask P_MESGOUT CDI|MSGI
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mask P_STATUS CDI|IOI
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mask P_MESGIN CDI|IOI|MSGI
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}
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/*
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* SCSI Rate Control (p. 3-17).
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* Contents of this register determine the Synchronous SCSI data transfer
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* rate and the maximum synchronous Req/Ack offset. An offset of 0 in the
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* SOFS (3:0) bits disables synchronous data transfers. Any offset value
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* greater than 0 enables synchronous transfers.
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*/
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register SCSIRATE {
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address 0x004
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access_mode RW
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bit WIDEXFER 0x80 /* Wide transfer control */
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mask SXFR 0x70 /* Sync transfer rate */
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mask SOFS 0x0f /* Sync offset */
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}
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/*
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* SCSI ID (p. 3-18).
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* Contains the ID of the board and the current target on the
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* selected channel.
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*/
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register SCSIID {
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address 0x005
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access_mode RW
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mask TID 0xf0 /* Target ID mask */
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mask OID 0x0f /* Our ID mask */
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}
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/*
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* SCSI Latched Data (p. 3-19).
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* Read/Write latches used to transfer data on the SCSI bus during
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* Automatic or Manual PIO mode. SCSIDATH can be used for the
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* upper byte of a 16bit wide asynchronouse data phase transfer.
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*/
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register SCSIDATL {
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address 0x006
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access_mode RW
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}
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register SCSIDATH {
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address 0x007
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access_mode RW
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}
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/*
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* SCSI Transfer Count (pp. 3-19,20)
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* These registers count down the number of bytes transferred
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* across the SCSI bus. The counter is decremented only once
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* the data has been safely transferred. SDONE in SSTAT0 is
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* set when STCNT goes to 0
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*/
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register STCNT {
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address 0x008
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size 3
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access_mode RW
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}
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/*
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* Clear SCSI Interrupt 0 (p. 3-20)
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* Writing a 1 to a bit clears the associated SCSI Interrupt in SSTAT0.
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*/
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register CLRSINT0 {
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address 0x00b
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access_mode WO
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bit CLRSELDO 0x40
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bit CLRSELDI 0x20
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bit CLRSELINGO 0x10
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bit CLRSWRAP 0x08
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bit CLRSPIORDY 0x02
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}
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/*
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* SCSI Status 0 (p. 3-21)
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* Contains one set of SCSI Interrupt codes
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* These are most likely of interest to the sequencer
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*/
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register SSTAT0 {
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address 0x00b
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access_mode RO
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bit TARGET 0x80 /* Board acting as target */
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bit SELDO 0x40 /* Selection Done */
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bit SELDI 0x20 /* Board has been selected */
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bit SELINGO 0x10 /* Selection In Progress */
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bit SWRAP 0x08 /* 24bit counter wrap */
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bit SDONE 0x04 /* STCNT = 0x000000 */
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bit SPIORDY 0x02 /* SCSI PIO Ready */
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bit DMADONE 0x01 /* DMA transfer completed */
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}
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/*
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* Clear SCSI Interrupt 1 (p. 3-23)
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* Writing a 1 to a bit clears the associated SCSI Interrupt in SSTAT1.
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*/
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register CLRSINT1 {
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address 0x00c
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access_mode WO
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bit CLRSELTIMEO 0x80
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bit CLRATNO 0x40
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|
bit CLRSCSIRSTI 0x20
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|
bit CLRBUSFREE 0x08
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|
bit CLRSCSIPERR 0x04
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|
bit CLRPHASECHG 0x02
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|
bit CLRREQINIT 0x01
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}
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|
|
/*
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* SCSI Status 1 (p. 3-24)
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*/
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register SSTAT1 {
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address 0x00c
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access_mode RO
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bit SELTO 0x80
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bit ATNTARG 0x40
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bit SCSIRSTI 0x20
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|
bit PHASEMIS 0x10
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|
bit BUSFREE 0x08
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bit SCSIPERR 0x04
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bit PHASECHG 0x02
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|
bit REQINIT 0x01
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}
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|
|
/*
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|
* SCSI Status 2 (pp. 3-25,26)
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*/
|
|
register SSTAT2 {
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address 0x00d
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|
access_mode RO
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|
bit OVERRUN 0x80
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|
mask SFCNT 0x1f
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|
}
|
|
|
|
/*
|
|
* SCSI Status 3 (p. 3-26)
|
|
*/
|
|
register SSTAT3 {
|
|
address 0x00e
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|
access_mode RO
|
|
mask SCSICNT 0xf0
|
|
mask OFFCNT 0x0f
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|
}
|
|
|
|
/*
|
|
* SCSI Test Control (p. 3-27)
|
|
*/
|
|
register SCSITEST {
|
|
address 0x00f
|
|
access_mode RW
|
|
bit RQAKCNT 0x04
|
|
bit CNTRTEST 0x02
|
|
bit CMODE 0x01
|
|
}
|
|
|
|
/*
|
|
* SCSI Interrupt Mode 1 (p. 3-28)
|
|
* Setting any bit will enable the corresponding function
|
|
* in SIMODE0 to interrupt via the IRQ pin.
|
|
*/
|
|
register SIMODE0 {
|
|
address 0x010
|
|
access_mode RW
|
|
bit ENSELDO 0x40
|
|
bit ENSELDI 0x20
|
|
bit ENSELINGO 0x10
|
|
bit ENSWRAP 0x08
|
|
bit ENSDONE 0x04
|
|
bit ENSPIORDY 0x02
|
|
bit ENDMADONE 0x01
|
|
}
|
|
|
|
/*
|
|
* SCSI Interrupt Mode 1 (pp. 3-28,29)
|
|
* Setting any bit will enable the corresponding function
|
|
* in SIMODE1 to interrupt via the IRQ pin.
|
|
*/
|
|
register SIMODE1 {
|
|
address 0x011
|
|
access_mode RW
|
|
bit ENSELTIMO 0x80
|
|
bit ENATNTARG 0x40
|
|
bit ENSCSIRST 0x20
|
|
bit ENPHASEMIS 0x10
|
|
bit ENBUSFREE 0x08
|
|
bit ENSCSIPERR 0x04
|
|
bit ENPHASECHG 0x02
|
|
bit ENREQINIT 0x01
|
|
}
|
|
|
|
/*
|
|
* SCSI Data Bus (High) (p. 3-29)
|
|
* This register reads data on the SCSI Data bus directly.
|
|
*/
|
|
register SCSIBUSL {
|
|
address 0x012
|
|
access_mode RO
|
|
}
|
|
|
|
register SCSIBUSH {
|
|
address 0x013
|
|
access_mode RO
|
|
}
|
|
|
|
/*
|
|
* SCSI/Host Address (p. 3-30)
|
|
* These registers hold the host address for the byte about to be
|
|
* transferred on the SCSI bus. They are counted up in the same
|
|
* manner as STCNT is counted down. SHADDR should always be used
|
|
* to determine the address of the last byte transferred since HADDR
|
|
* can be skewed by write ahead.
|
|
*/
|
|
register SHADDR {
|
|
address 0x014
|
|
size 4
|
|
access_mode RO
|
|
}
|
|
|
|
/*
|
|
* Selection Timeout Timer (p. 3-30)
|
|
*/
|
|
register SELTIMER {
|
|
address 0x018
|
|
access_mode RW
|
|
bit STAGE6 0x20
|
|
bit STAGE5 0x10
|
|
bit STAGE4 0x08
|
|
bit STAGE3 0x04
|
|
bit STAGE2 0x02
|
|
bit STAGE1 0x01
|
|
}
|
|
|
|
/*
|
|
* Selection/Reselection ID (p. 3-31)
|
|
* Upper four bits are the device id. The ONEBIT is set when the re/selecting
|
|
* device did not set its own ID.
|
|
*/
|
|
register SELID {
|
|
address 0x019
|
|
access_mode RW
|
|
mask SELID_MASK 0xf0
|
|
bit ONEBIT 0x08
|
|
}
|
|
|
|
/*
|
|
* SCSI Block Control (p. 3-32)
|
|
* Controls Bus type and channel selection. In a twin channel configuration
|
|
* addresses 0x00-0x1e are gated to the appropriate channel based on this
|
|
* register. SELWIDE allows for the coexistence of 8bit and 16bit devices
|
|
* on a wide bus.
|
|
*/
|
|
register SBLKCTL {
|
|
address 0x01f
|
|
access_mode RW
|
|
bit DIAGLEDEN 0x80 /* Aic78X0 only */
|
|
bit DIAGLEDON 0x40 /* Aic78X0 only */
|
|
bit AUTOFLUSHDIS 0x20
|
|
bit SELBUSB 0x08
|
|
bit SELWIDE 0x02
|
|
}
|
|
|
|
/*
|
|
* Sequencer Control (p. 3-33)
|
|
* Error detection mode and speed configuration
|
|
*/
|
|
register SEQCTL {
|
|
address 0x060
|
|
access_mode RW
|
|
bit PERRORDIS 0x80
|
|
bit PAUSEDIS 0x40
|
|
bit FAILDIS 0x20
|
|
bit FASTMODE 0x10
|
|
bit BRKADRINTEN 0x08
|
|
bit STEP 0x04
|
|
bit SEQRESET 0x02
|
|
bit LOADRAM 0x01
|
|
}
|
|
|
|
/*
|
|
* Sequencer RAM Data (p. 3-34)
|
|
* Single byte window into the Scratch Ram area starting at the address
|
|
* specified by SEQADDR0 and SEQADDR1. To write a full word, simply write
|
|
* four bytes in sucessesion. The SEQADDRs will increment after the most
|
|
* significant byte is written
|
|
*/
|
|
register SEQRAM {
|
|
address 0x061
|
|
access_mode RW
|
|
}
|
|
|
|
/*
|
|
* Sequencer Address Registers (p. 3-35)
|
|
* Only the first bit of SEQADDR1 holds addressing information
|
|
*/
|
|
register SEQADDR0 {
|
|
address 0x062
|
|
access_mode RW
|
|
}
|
|
|
|
register SEQADDR1 {
|
|
address 0x063
|
|
access_mode RW
|
|
mask SEQADDR1_MASK 0x01
|
|
}
|
|
|
|
/*
|
|
* Accumulator
|
|
* We cheat by passing arguments in the Accumulator up to the kernel driver
|
|
*/
|
|
register ACCUM {
|
|
address 0x064
|
|
access_mode RW
|
|
accumulator
|
|
}
|
|
|
|
register SINDEX {
|
|
address 0x065
|
|
access_mode RW
|
|
sindex
|
|
}
|
|
|
|
register DINDEX {
|
|
address 0x066
|
|
access_mode RW
|
|
}
|
|
|
|
register ALLONES {
|
|
address 0x069
|
|
access_mode RO
|
|
allones
|
|
}
|
|
|
|
register ALLZEROS {
|
|
address 0x06a
|
|
access_mode RO
|
|
allzeros
|
|
}
|
|
|
|
register NONE {
|
|
address 0x06a
|
|
access_mode WO
|
|
none
|
|
}
|
|
|
|
register FLAGS {
|
|
address 0x06b
|
|
access_mode RO
|
|
bit ZERO 0x02
|
|
bit CARRY 0x01
|
|
}
|
|
|
|
register SINDIR {
|
|
address 0x06c
|
|
access_mode RO
|
|
}
|
|
|
|
register DINDIR {
|
|
address 0x06d
|
|
access_mode WO
|
|
}
|
|
|
|
register FUNCTION1 {
|
|
address 0x06e
|
|
access_mode RW
|
|
}
|
|
|
|
register STACK {
|
|
address 0x06f
|
|
access_mode RO
|
|
}
|
|
|
|
/*
|
|
* Board Control (p. 3-43)
|
|
*/
|
|
register BCTL {
|
|
address 0x084
|
|
access_mode RW
|
|
bit ACE 0x08
|
|
bit ENABLE 0x01
|
|
}
|
|
|
|
/*
|
|
* On the aic78X0 chips, Board Control is replaced by the DSCommand
|
|
* register (p. 4-64)
|
|
*/
|
|
register DSCOMMAND {
|
|
address 0x084
|
|
access_mode RW
|
|
bit CACHETHEN 0x80 /* Cache Threshold enable */
|
|
bit DPARCKEN 0x40 /* Data Parity Check Enable */
|
|
bit MPARCKEN 0x20 /* Memory Parity Check Enable */
|
|
bit EXTREQLCK 0x10 /* External Request Lock */
|
|
}
|
|
|
|
/*
|
|
* Bus On/Off Time (p. 3-44)
|
|
*/
|
|
register BUSTIME {
|
|
address 0x085
|
|
access_mode RW
|
|
mask BOFF 0xf0
|
|
mask BON 0x0f
|
|
}
|
|
|
|
/*
|
|
* Bus Speed (p. 3-45)
|
|
*/
|
|
register BUSSPD {
|
|
address 0x086
|
|
access_mode RW
|
|
mask DFTHRSH 0xc0
|
|
mask STBOFF 0x38
|
|
mask STBON 0x07
|
|
mask DFTHRSH_100 0xc0
|
|
}
|
|
|
|
/*
|
|
* Host Control (p. 3-47) R/W
|
|
* Overall host control of the device.
|
|
*/
|
|
register HCNTRL {
|
|
address 0x087
|
|
access_mode RW
|
|
bit POWRDN 0x40
|
|
bit SWINT 0x10
|
|
bit IRQMS 0x08
|
|
bit PAUSE 0x04
|
|
bit INTEN 0x02
|
|
bit CHIPRST 0x01
|
|
bit CHIPRSTACK 0x01
|
|
}
|
|
|
|
/*
|
|
* Host Address (p. 3-48)
|
|
* This register contains the address of the byte about
|
|
* to be transferred across the host bus.
|
|
*/
|
|
register HADDR {
|
|
address 0x088
|
|
size 4
|
|
access_mode RW
|
|
}
|
|
|
|
register HCNT {
|
|
address 0x08c
|
|
size 3
|
|
access_mode RW
|
|
}
|
|
|
|
/*
|
|
* SCB Pointer (p. 3-49)
|
|
* Gate one of the four SCBs into the SCBARRAY window.
|
|
*/
|
|
register SCBPTR {
|
|
address 0x090
|
|
access_mode RW
|
|
}
|
|
|
|
/*
|
|
* Interrupt Status (p. 3-50)
|
|
* Status for system interrupts
|
|
*/
|
|
register INTSTAT {
|
|
address 0x091
|
|
access_mode RW
|
|
bit BRKADRINT 0x08
|
|
bit SCSIINT 0x04
|
|
bit CMDCMPLT 0x02
|
|
bit SEQINT 0x01
|
|
mask BAD_PHASE SEQINT /* unknown scsi bus phase */
|
|
mask SEND_REJECT 0x10|SEQINT /* sending a message reject */
|
|
mask NO_IDENT 0x20|SEQINT /* no IDENTIFY after reconnect*/
|
|
mask NO_MATCH 0x30|SEQINT /* no cmd match for reconnect */
|
|
mask EXTENDED_MSG 0x40|SEQINT /* Extended message received */
|
|
mask NO_MATCH_BUSY 0x50|SEQINT /* Couldn't find BUSY SCB */
|
|
mask REJECT_MSG 0x60|SEQINT /* Reject message received */
|
|
mask BAD_STATUS 0x70|SEQINT /* Bad status from target */
|
|
mask RESIDUAL 0x80|SEQINT /* Residual byte count != 0 */
|
|
mask ABORT_CMDCMPLT 0x91 /*
|
|
* Command tagged for abort
|
|
* completed successfully.
|
|
*/
|
|
mask AWAITING_MSG 0xa0|SEQINT /*
|
|
* Kernel requested to specify
|
|
* a message to this target
|
|
* (command was null), so tell
|
|
* it that it can fill the
|
|
* message buffer.
|
|
*/
|
|
mask MSG_BUFFER_BUSY 0xc0|SEQINT /*
|
|
* Sequencer wants to use the
|
|
* message buffer, but it
|
|
* already contains a message
|
|
*/
|
|
mask MSGIN_PHASEMIS 0xd0|SEQINT /*
|
|
* Target changed phase on us
|
|
* when we were expecting
|
|
* another msgin byte.
|
|
*/
|
|
mask DATA_OVERRUN 0xe0|SEQINT /*
|
|
* Target attempted to write
|
|
* beyond the bounds of its
|
|
* command.
|
|
*/
|
|
|
|
mask SEQINT_MASK 0xf0|SEQINT /* SEQINT Status Codes */
|
|
mask INT_PEND (BRKADRINT|SEQINT|SCSIINT|CMDCMPLT)
|
|
}
|
|
|
|
/*
|
|
* Hard Error (p. 3-53)
|
|
* Reporting of catastrophic errors. You usually cannot recover from
|
|
* these without a full board reset.
|
|
*/
|
|
register ERROR {
|
|
address 0x092
|
|
access_mode RO
|
|
bit PARERR 0x08
|
|
bit ILLOPCODE 0x04
|
|
bit ILLSADDR 0x02
|
|
bit ILLHADDR 0x01
|
|
}
|
|
|
|
/*
|
|
* Clear Interrupt Status (p. 3-52)
|
|
*/
|
|
register CLRINT {
|
|
address 0x092
|
|
access_mode WO
|
|
bit CLRBRKADRINT 0x08
|
|
bit CLRSCSIINT 0x04
|
|
bit CLRCMDINT 0x02
|
|
bit CLRSEQINT 0x01
|
|
}
|
|
|
|
register DFCNTRL {
|
|
address 0x093
|
|
access_mode RW
|
|
bit WIDEODD 0x40
|
|
bit SCSIEN 0x20
|
|
bit SDMAEN 0x10
|
|
bit SDMAENACK 0x10
|
|
bit HDMAEN 0x08
|
|
bit HDMAENACK 0x08
|
|
bit DIRECTION 0x04
|
|
bit FIFOFLUSH 0x02
|
|
bit FIFORESET 0x01
|
|
}
|
|
|
|
register DFSTATUS {
|
|
address 0x094
|
|
access_mode RO
|
|
bit DWORDEMP 0x20
|
|
bit MREQPEND 0x10
|
|
bit HDONE 0x08
|
|
bit DFTHRESH 0x04
|
|
bit FIFOFULL 0x02
|
|
bit FIFOEMP 0x01
|
|
}
|
|
|
|
register DFDAT {
|
|
address 0x099
|
|
access_mode RW
|
|
}
|
|
|
|
/*
|
|
* SCB Auto Increment (p. 3-59)
|
|
* Byte offset into the SCB Array and an optional bit to allow auto
|
|
* incrementing of the address during download and upload operations
|
|
*/
|
|
register SCBCNT {
|
|
address 0x09a
|
|
access_mode RW
|
|
bit SCBAUTO 0x80
|
|
mask SCBCNT_MASK 0x1f
|
|
}
|
|
|
|
/*
|
|
* Queue In FIFO (p. 3-60)
|
|
* Input queue for queued SCBs (commands that the seqencer has yet to start)
|
|
*/
|
|
register QINFIFO {
|
|
address 0x09b
|
|
access_mode RW
|
|
}
|
|
|
|
/*
|
|
* Queue In Count (p. 3-60)
|
|
* Number of queued SCBs
|
|
*/
|
|
register QINCNT {
|
|
address 0x09c
|
|
access_mode RO
|
|
}
|
|
|
|
/*
|
|
* Queue Out FIFO (p. 3-61)
|
|
* Queue of SCBs that have completed and await the host
|
|
*/
|
|
register QOUTFIFO {
|
|
address 0x09d
|
|
access_mode WO
|
|
}
|
|
|
|
/*
|
|
* Queue Out Count (p. 3-61)
|
|
* Number of queued SCBs in the Out FIFO
|
|
*/
|
|
register QOUTCNT {
|
|
address 0x09e
|
|
access_mode RO
|
|
}
|
|
|
|
/*
|
|
* SCB Definition (p. 5-4)
|
|
*/
|
|
scb {
|
|
address 0x0a0
|
|
SCB_CONTROL {
|
|
size 1
|
|
bit MK_MESSAGE 0x80
|
|
bit DISCENB 0x40
|
|
bit TAG_ENB 0x20
|
|
bit MUST_DMAUP_SCB 0x10
|
|
bit ABORT_SCB 0x08
|
|
bit DISCONNECTED 0x04
|
|
mask SCB_TAG_TYPE 0x03
|
|
}
|
|
SCB_TCL {
|
|
size 1
|
|
bit SELBUSB 0x08
|
|
mask TID 0xf0
|
|
mask LID 0x07
|
|
}
|
|
SCB_TARGET_STATUS {
|
|
size 1
|
|
}
|
|
SCB_SGCOUNT {
|
|
size 1
|
|
}
|
|
SCB_SGPTR {
|
|
size 4
|
|
}
|
|
SCB_RESID_SGCNT {
|
|
size 1
|
|
}
|
|
SCB_RESID_DCNT {
|
|
size 3
|
|
}
|
|
SCB_DATAPTR {
|
|
size 4
|
|
}
|
|
SCB_DATACNT {
|
|
size 3
|
|
}
|
|
SCB_LINKED_NEXT {
|
|
size 1
|
|
}
|
|
SCB_CMDPTR {
|
|
size 4
|
|
}
|
|
SCB_CMDLEN {
|
|
size 1
|
|
}
|
|
SCB_TAG {
|
|
size 1
|
|
}
|
|
SCB_NEXT {
|
|
size 1
|
|
}
|
|
SCB_PREV {
|
|
size 1
|
|
}
|
|
SCB_BUSYTARGETS {
|
|
size 4
|
|
}
|
|
}
|
|
|
|
const SG_SIZEOF 0x08 /* sizeof(struct ahc_dma) */
|
|
|
|
/* --------------------- AHA-2840-only definitions -------------------- */
|
|
|
|
register SEECTL_2840 {
|
|
address 0x0c0
|
|
access_mode RW
|
|
bit CS_2840 0x04
|
|
bit CK_2840 0x02
|
|
bit DO_2840 0x01
|
|
}
|
|
|
|
register STATUS_2840 {
|
|
address 0x0c1
|
|
access_mode RW
|
|
bit EEPROM_TF 0x80
|
|
mask BIOS_SEL 0x60
|
|
mask ADSEL 0x1e
|
|
bit DI_2840 0x01
|
|
}
|
|
|
|
/* --------------------- AIC-7870-only definitions -------------------- */
|
|
|
|
register DSPCISTATUS {
|
|
address 0x086
|
|
}
|
|
|
|
register BRDCTL {
|
|
address 0x01d
|
|
bit BRDDAT7 0x80
|
|
bit BRDDAT6 0x40
|
|
bit BRDDAT5 0x20
|
|
bit BRDSTB 0x10
|
|
bit BRDCS 0x08
|
|
bit BRDRW 0x04
|
|
bit BRDCTL1 0x02
|
|
bit BRDCTL0 0x01
|
|
}
|
|
|
|
/*
|
|
* Serial EEPROM Control (p. 4-92 in 7870 Databook)
|
|
* Controls the reading and writing of an external serial 1-bit
|
|
* EEPROM Device. In order to access the serial EEPROM, you must
|
|
* first set the SEEMS bit that generates a request to the memory
|
|
* port for access to the serial EEPROM device. When the memory
|
|
* port is not busy servicing another request, it reconfigures
|
|
* to allow access to the serial EEPROM. When this happens, SEERDY
|
|
* gets set high to verify that the memory port access has been
|
|
* granted.
|
|
*
|
|
* After successful arbitration for the memory port, the SEECS bit of
|
|
* the SEECTL register is connected to the chip select. The SEECK,
|
|
* SEEDO, and SEEDI are connected to the clock, data out, and data in
|
|
* lines respectively. The SEERDY bit of SEECTL is useful in that it
|
|
* gives us an 800 nsec timer. After a write to the SEECTL register,
|
|
* the SEERDY goes high 800 nsec later. The one exception to this is
|
|
* when we first request access to the memory port. The SEERDY goes
|
|
* high to signify that access has been granted and, for this case, has
|
|
* no implied timing.
|
|
*
|
|
* See 93cx6.c for detailed information on the protocol necessary to
|
|
* read the serial EEPROM.
|
|
*/
|
|
register SEECTL {
|
|
address 0x01e
|
|
bit EXTARBACK 0x80
|
|
bit EXTARBREQ 0x40
|
|
bit SEEMS 0x20
|
|
bit SEERDY 0x10
|
|
bit SEECS 0x08
|
|
bit SEECK 0x04
|
|
bit SEEDO 0x02
|
|
bit SEEDI 0x01
|
|
}
|
|
/* ---------------------- Scratch RAM Offsets ------------------------- */
|
|
/* These offsets are either to values that are initialized by the board's
|
|
* BIOS or are specified by the sequencer code.
|
|
*
|
|
* The host adapter card (at least the BIOS) uses 20-2f for SCSI
|
|
* device information, 32-33 and 5a-5f as well. As it turns out, the
|
|
* BIOS trashes 20-2f, writing the synchronous negotiation results
|
|
* on top of the BIOS values, so we re-use those for our per-target
|
|
* scratchspace (actually a value that can be copied directly into
|
|
* SCSIRATE). The kernel driver will enable synchronous negotiation
|
|
* for all targets that have a value other than 0 in the lower four
|
|
* bits of the target scratch space. This should work regardless of
|
|
* whether the bios has been installed.
|
|
*/
|
|
|
|
scratch_ram {
|
|
address 0x020
|
|
|
|
/*
|
|
* 1 byte per target starting at this address for configuration values
|
|
*/
|
|
TARG_SCRATCH {
|
|
size 16
|
|
}
|
|
ULTRA_ENB {
|
|
size 2
|
|
}
|
|
/*
|
|
* Bit vector of targets that have disconnection disabled.
|
|
*/
|
|
DISC_DSB {
|
|
size 2
|
|
}
|
|
/*
|
|
* Length of pending message
|
|
*/
|
|
MSG_LEN {
|
|
size 1
|
|
}
|
|
/* We reserve 8bytes to store outgoing messages */
|
|
MSG_OUT {
|
|
size 8
|
|
}
|
|
/* Parameters for DMA Logic */
|
|
DMAPARAMS {
|
|
size 1
|
|
bit WIDEODD 0x40
|
|
bit SCSIEN 0x20
|
|
bit SDMAEN 0x10
|
|
bit SDMAENACK 0x10
|
|
bit HDMAEN 0x08
|
|
bit HDMAENACK 0x08
|
|
bit DIRECTION 0x04
|
|
bit FIFOFLUSH 0x02
|
|
bit FIFORESET 0x01
|
|
}
|
|
SEQ_FLAGS {
|
|
size 1
|
|
bit RESELECTED 0x80
|
|
bit IDENTIFY_SEEN 0x40
|
|
bit TAGGED_SCB 0x20
|
|
bit DPHASE 0x10
|
|
bit PAGESCBS 0x04
|
|
bit WIDE_BUS 0x02
|
|
bit TWIN_BUS 0x01
|
|
}
|
|
/*
|
|
* Temporary storage for the
|
|
* target/channel/lun of a
|
|
* reconnecting target
|
|
*/
|
|
SAVED_TCL {
|
|
size 1
|
|
}
|
|
SG_COUNT {
|
|
size 1
|
|
}
|
|
/* working value of SG pointer */
|
|
SG_NEXT {
|
|
size 4
|
|
}
|
|
/*
|
|
* head of list of SCBs awaiting
|
|
* selection
|
|
*/
|
|
WAITING_SCBH {
|
|
size 1
|
|
}
|
|
SAVED_LINKPTR {
|
|
size 1
|
|
}
|
|
SAVED_SCBPTR {
|
|
size 1
|
|
}
|
|
/*
|
|
* The last bus phase as seen by the sequencer.
|
|
*/
|
|
LASTPHASE {
|
|
size 1
|
|
bit CDI 0x80
|
|
bit IOI 0x40
|
|
bit MSGI 0x20
|
|
mask PHASE_MASK CDI|IOI|MSGI
|
|
mask P_DATAOUT 0x00
|
|
mask P_DATAIN IOI
|
|
mask P_COMMAND CDI
|
|
mask P_MESGOUT CDI|MSGI
|
|
mask P_STATUS CDI|IOI
|
|
mask P_MESGIN CDI|IOI|MSGI
|
|
mask P_BUSFREE 0x01
|
|
}
|
|
MSGIN_EXT_LEN {
|
|
size 1
|
|
}
|
|
MSGIN_EXT_OPCODE {
|
|
size 1
|
|
}
|
|
/*
|
|
* location 3, stores the last
|
|
* byte of an extended message if
|
|
* it passes the two bytes of space
|
|
* we allow now. This byte isn't
|
|
* used for anything, it just makes
|
|
* the code shorter for tossing
|
|
* extra bytes.
|
|
*/
|
|
MSGIN_EXT_BYTES {
|
|
size 3
|
|
}
|
|
/*
|
|
* head of list of SCBs that are
|
|
* disconnected. Used for SCB
|
|
* paging.
|
|
*/
|
|
DISCONNECTED_SCBH {
|
|
size 1
|
|
}
|
|
/*
|
|
* head of list of SCBs that are
|
|
* not in use. Used for SCB paging.
|
|
*/
|
|
FREE_SCBH {
|
|
size 1
|
|
}
|
|
HSCB_ADDR {
|
|
size 4
|
|
}
|
|
CUR_SCBID {
|
|
size 1
|
|
}
|
|
/*
|
|
* Running count of commands placed in
|
|
* the QOUTFIFO. This is cleared by the
|
|
* kernel driver every FIFODEPTH commands.
|
|
*/
|
|
CMDOUTCNT {
|
|
size 1
|
|
}
|
|
ARG_1 {
|
|
size 1
|
|
mask SEND_MSG 0x80
|
|
mask SEND_SENSE 0x40
|
|
mask SEND_REJ 0x20
|
|
alias RETURN_1
|
|
}
|
|
/*
|
|
* These are reserved registers in the card's scratch ram. Some of
|
|
* the values are specified in the AHA2742 technical reference manual
|
|
* and are initialized by the BIOS at boot time.
|
|
*/
|
|
SCSICONF {
|
|
address 0x05a
|
|
size 1
|
|
bit RESET_SCSI 0x40
|
|
}
|
|
HOSTCONF {
|
|
address 0x05d
|
|
size 1
|
|
}
|
|
HA_274_BIOSCTRL {
|
|
address 0x05f
|
|
size 1
|
|
mask BIOSMODE 0x30
|
|
mask BIOSDISABLED 0x30
|
|
bit CHANNEL_B_PRIMARY 0x08
|
|
}
|
|
}
|
|
|
|
const SCB_LIST_NULL 0xff
|
|
|
|
|
|
/* WDTR Message values */
|
|
const BUS_8_BIT 0x00
|
|
const BUS_16_BIT 0x01
|
|
const BUS_32_BIT 0x02
|
|
const MAX_OFFSET_8BIT 0x0f
|
|
const MAX_OFFSET_16BIT 0x08
|
|
|
|
/*
|
|
* Downloaded (kernel inserted) constants
|
|
*/
|
|
const SCBCOUNT download /* The number of SCBs on this card */
|
|
const COMP_SCBCOUNT download /* Two's complement of max SCBID */
|
|
/*
|
|
* The maximum number of entries allowed in the QIN/OUTFIFO.
|
|
*/
|
|
const FIFODEPTH download /* Two's complement of SCBCOUNT */
|
|
/*
|
|
* Mask of bits to test against when looking at the Queue Count
|
|
* registers. Works around a bug on aic7850 chips.
|
|
*/
|
|
const QCNTMASK download
|