1.\" 2.\" Copyright (c) 1995 3.\" Justin T. Gibbs. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. The name of the author may not be used to endorse or promote products 14.\" derived from this software withough specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" 28.Dd April 15, 1995 29.Dt AHC 4 i386 30.Os FreeBSD 31.Sh NAME 32.Nm ahc 33.Nd 34Adaptec VL/EISA/PCI SCSI host adapter driver 35.Sh SYNOPSIS 36For VL/EISA cards: 37.Cd "controller ahc0 at isa? bio irq ? vector ahcintr 38.sp 39For PCI cards: 40.Cd "controller ahc0 41.sp 42For one or more SCSI busses: 43.Cd "controller scbus0 44.sp 45For one or more disk devices: 46.Cd "device sd0 47.sp 48For one or more tape devices: 49.Cd "device st0 50.sp 51For one or more cdroms: 52.Cd "device cd0 53.Sh DESCRIPTION 54This driver provides access to SCSI devices connected to an Adaptec 55274x, 284x, 294x, or motherboard based aic7770/aic7870 hostadapter. 56Features include twin and wide bus support, 2 commands per target in 57non-tagged queuing mode, and experimental tagged queuing support enabled 58with: 59.sp 60.Cd "option AHC_TAGENABLE 61.sp 62Per target configuration performed in the SCSI-Select menu, accesible at boot 63in non-EISA models or throught an EISA configuration utility for EISA models, 64is honored by this driver with the stipulation that the BIOS is enabled for 65EISA adaptors. This includes syncronous/asyncronous transfers, disconnection, 66and maximum syncronous negotiation rate settings. 67.sp 68Note that I/O addresses are determined automatically by the probe routines, 69but care should be taken when using a 284x (VLB controller) in an EISA 70system. Ensure that the jumpers setting the I/O area for the 284x match the 71EISA slot into which the card is inserted to prevent conflicts with other 72EISA cards. 73.Sh BUGS 74Some Quantum drives (at least the Empire 2100 and 1080s) will not run on an 75aic7870 in syncronous mode at 10MB/s. It is speculated that the Adaptec 76runs slightly above 10MB/s causing the drive much confusion. Setting a 77maximum syncronous negotiation rate of 8MB/s in the SCSI-Select utility 78will allow normal function. 79.sp 80The SCSI ID of aic7870 based controllers (AHA-294x) is hard coded to 7 by 81the driver. The user configured ID can be obtained by querying the SEEPROM 82or NVRAM where these settings are stored, but there is no driver support for 83this as of yet. 84.Sh FILES 85.Bl -tag -width Pa -compact 86.It Pa /sys/i386/scsi/aic7xxx.c 87.It Pa /sys/i386/scsi/aic7xxx.h 88Bus independent driver source 89.It Pa /sys/i386/eisa/aic7770.c 90EISA device probe/attach routines 91.It Pa /sys/pci/aic7870.c 92PCI device probe/attach routines 93.It Pa /sys/dev/aic7xxx/aic7xxx.seq 94aic7xxx sequencer program 95.It Pa /sys/i386/conf/GENERIC 96sample generic kernel config file including Adaptec support 97.El 98.Sh SEE ALSO 99.Xr aha 4 100.Xr ahb 4 101.Xr aic7xxx_asm 1 102.Xr cd 4 103.Xr scsi 4 104.Xr sd 4 105.Xr st 4 106