efa(4) - NetBSD Manual Pages

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EFA(4)               NetBSD/amiga Kernel Interfaces Manual              EFA(4)


NAME

     efa -- ELBOX FastATA 1200 IDE disk controller driver


SYNOPSIS

     efa0 at mainbus0


DESCRIPTION

     The efa driver provides support for the FastATA 1200 family of IDE con-
     trollers and provides the interface with the hardware for the ata(4)
     driver.  PIO modes 0, 3, 4 and 5 are supported.


HARDWARE

     The efa driver supports the following hardware:

           ELBOX FastATA 1200 Mk-III

           ELBOX FastATA 1200 Mk-IV


SEE ALSO

     ata(4), wdc(4)


HISTORY

     The efa device first appeared in NetBSD 6.0.


AUTHORS

     The efa driver was written by Radoslaw Kujawa
     <radoslaw.kujawa@gmail.com>.


CAVEATS

     Older versions of FastATA 1200 are NOT supported:

           ELBOX FastATA 1200 Mk-I

           ELBOX FastATA 1200 Lite

           ELBOX FastATA 1200 GOLD

           ELBOX FastATA 1200 Mk-II

     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.

     Some of the above devices were also marketed under PowerFlyer and Winner
     brands.

     The onboard Gayle IDE controller can not be used when FastATA is
     installed and therefore, the efa driver will not coexist with wdc(4)
     driver attached to mainbus(4).  Both efa and wdc(4) can be enabled in the
     same kernel, but only one will attach (depending on the return value of
     probe function in the efa driver).

     DMA modes are not supported, this is a hardware limitation.


BUGS

     Performance is worse than with official AmigaOS driver from ELBOX.

     Disks partitioned in split mode, which is specific to official AmigaOS
     FastATA driver, are not recognized in NetBSD.

NetBSD 6.0                     October 25, 2011                     NetBSD 6.0