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+.\" Copyright (c) 2002, 2004
+.\"	Thomas Quinot <thomas@FreeBSD.org>. 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. Neither the name of the author nor the names of any co-contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"   without specific prior written permission.
+.\"
+.\" 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 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) 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd October 23, 2002
+.Dt ATAPICAM 4
+.Os
+.Sh NAME
+.Nm atapicam
+.Nd CAM XPT (transport) module for ATAPI devices
+.Sh SYNOPSIS
+.Cd "device atapicam"
+.Sh DESCRIPTION
+The ATAPI/CAM module allows ATAPI devices (CD-ROM, CD-RW, DVD drives,
+floppy drives such as Iomega Zip, tape drives) to be accessed through
+the SCSI subsystem,
+.Xr cam 4 .
+.Pp
+.Xr ata 4
+and
+.Xr scbus 4
+must be configured in the kernel as well.
+The SCSI target drivers
+.Xr ( cd 4 ,
+.Xr da 4 ,
+or
+.Xr st 4 )
+can then be used to access the devices.
+The generic passthrough device,
+.Xr pass 4 ,
+can also be used to send SCSI commands directly
+to the devices through the CAM API.
+.Pp
+A separate CAM bus is created for each ATA bus in the system.
+On each of these buses, target ID 0 is assigned to the master
+device, and ID 1 is assigned to the slave
+(provided they are ATAPI devices).
+.Sh IMPLEMENTATION NOTES
+Some SCSI commands are intercepted by the driver, and undergo special
+processing in order to work around limitations of ATAPI devices.
+Such limitations can be consequences of the ATAPI specification.
+For example, ATAPI devices do not implement the 6-byte versions
+of
+.Dv MODE_SELECT , MODE_SENSE , READ ,
+or
+.Dv WRITE .
+They can also be common bugs, such as hanging when queried for
+extended
+.Dv INQUIRY
+information.
+.Sh EXAMPLES
+.Bd -literal -offset indent
+device ata
+device atapicam
+device scbus
+device cd
+device pass
+.Ed
+.Pp
+Add the
+.Nm
+driver to the kernel.
+.Pp
+.Dl "camcontrol devlist"
+.Pp
+Print the list of all devices available through CAM.
+.Pp
+.Dl "mount -t cd9660 /dev/cd0 /mnt"
+.Pp
+Mount a CD-ROM from an ATAPI CD-ROM drive
+(the command above assumes that the ATAPI drive is the only CD-ROM unit).
+.Sh SEE ALSO
+.Xr ata 4 ,
+.Xr cam 4 ,
+.Xr scsi 4 ,
+.Xr atacontrol 8 ,
+.Xr camcontrol 8
+.Sh HISTORY
+The ATAPI/CAM driver first appeared in
+.Fx 4.8
+and
+.Fx 5.0 .
+.Sh AUTHORS
+The ATAPI/CAM driver was written by
+.An Thomas Quinot Aq thomas@FreeBSD.org .
+.Sh BUGS
+.Nm
+and ATAPI-specific target drivers
+.Xr ( acd 4 ,
+.Xr ast 4 ,
+and
+.Xr afd 4 )
+can be configured in the same kernel.
+Simultaneous access to the same device through the SCSI generic drivers
+and the ATAPI-specific drivers may cause problems and is strongly discouraged.