1.\" Copyright (c) 1995 2.\" Peter Dufault, All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 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.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $Id$ 27.\" 28.Dd March 2, 1995 29.Dt PT 4 30.Os FreeBSD 31.Sh NAME 32.Nm pt 33.Nd SCSI processor type driver 34.Sh SYNOPSIS 35.Cd device pt0 at scbus? 36.Sh DESCRIPTION 37The 38.Nm 39driver provides support for a 40.Tn SCSI 41processor type device. These are usually scanners and other 42devices using the 43.Tn SCSI 44link as a communication interface with device 45specific commands embedded in the data stream. 46.Pp 47A 48.Tn SCSI 49adapter must be separately configured into the system 50before this driver can be used. 51.Pp 52This device only supports 53.Xr read 2 54and 55.Xr write 2 , 56and the generic 57.Tn SCSI 58.Xr ioctl 2 59calls. 60The 61.Sq Li at scbus? 62is required in the config file for the configuration 63system to know this is a SCSI device and generate the appropriate 64tables. 65.Pp 66The 67.Sq Li 0 68in 69.Sq Li pt0 70in the configuration is required. 71This is a deficiency in 72.Xr config 8 . 73.Sh IOCTLS 74The 75.Nm 76driver has no 77.Fn ioctl 78commands of its own but rather acts as a medium for the 79generic 80.Xr scsi 4 81commands. These are described in 82.Aq Pa sys/scsiio.h . 83All 84.Xr scsi 4 85debug ioctls work on 86.Nm 87devices. 88.Sh FILES 89.Bl -tag -width /dev/ptQQQ -compact 90.It Pa /dev/pt Ns Ar N 91the 92.No Ar N Ns th processor device. 93.El 94.Sh SEE ALSO 95.Xr scsi 4 96.Sh HISTORY 97The 98.Nm 99driver appeared in 100.Fx 2.1 . 101