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+.\" $NetBSD: efa.4,v 1.8 2014/03/18 18:20:39 riastradh Exp $
+.\"
+.\" Copyright (c) 2011 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Radoslaw Kujawa.
+.\"
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd April 13, 2012
+.Dt EFA 4 amiga
+.Os
+.Sh NAME
+.Nm efa
+.Nd ELBOX FastATA 1200 IDE disk controller driver
+.Sh SYNOPSIS
+.Cd "efa0 at mainbus0"
+.\".Cd "options EFA_32BIT_IO"
+.\".Cd "options EFA_NO_INTR"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the FastATA 1200 family of IDE controllers and
+provides the interface with the hardware for the
+.Xr ata 4
+driver.
+PIO modes 0, 3, 4 and 5 are supported.
+.\".Pp
+.\"The following kernel configuration options are available:
+.\".Bl -ohang
+.\".It Cd options EFA_32BIT_IO
+.\"Use 32-bit data port.
+.\".It Cd options EFA_NO_INTR
+.\"Disable hardware interrupt support.
+.\".El
+.Sh HARDWARE
+The
+.Nm
+driver supports the following hardware:
+.Bl -tag -width "ELBOX FastATA 1200 Mk-IV" -offset indent
+.It Em ELBOX FastATA 1200 Mk-III
+.It Em ELBOX FastATA 1200 Mk-IV
+.It Em ELBOX FastATA 1200 Mk-IV CF/SATA
+.El
+.Sh SEE ALSO
+.Xr ata 4 ,
+.Xr wdc 4
+.Sh HISTORY
+The
+.Nm
+device first appeared in
+.Nx 6.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Radoslaw Kujawa Aq Mt radoslaw.kujawa@gmail.com .
+.Sh CAVEATS
+Older versions of FastATA 1200 are NOT supported:
+.Bl -tag -width "ELBOX FastATA 1200 Mk-II" -offset indent
+.It Em ELBOX FastATA 1200 Mk-I
+.It Em ELBOX FastATA 1200 Lite
+.It Em ELBOX FastATA 1200 GOLD
+.It Em ELBOX FastATA 1200 Mk-II
+.El
+.Pp
+These devices do not generate hardware interrupts and need to be driven in
+non-standard polling mode.
+Code needed to support it is present in driver but does not work correctly.
+.Pp
+Some of the above devices were also marketed under PowerFlyer and Winner brands.
+.Pp
+The onboard Gayle IDE controller can not be used when FastATA is installed and
+therefore, the
+.Nm
+driver will not coexist with
+.Xr wdc 4
+driver attached to
+.Xr mainbus 4 .
+Both
+.Nm
+and
+.Xr wdc 4
+can be enabled in the same kernel, but only one will attach (depending on the
+return value of probe function in the
+.Nm
+driver).
+.Pp
+DMA modes are not supported, this is a hardware limitation.
+.Sh BUGS
+Performance is worse than with official AmigaOS driver from ELBOX.
+.Pp
+Disks partitioned in split mode, which is specific to official AmigaOS FastATA
+driver, are not recognized in
+.Nx .