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EFA(4) NetBSD/amiga Kernel Interfaces Manual EFA(4)
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by Kimmo Suominen.
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efa -- ELBOX FastATA 1200 IDE disk controller driver
efa0 at mainbus0
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.
The efa driver supports the following hardware:
ELBOX FastATA 1200 Mk-III
ELBOX FastATA 1200 Mk-IV
ELBOX FastATA 1200 Mk-IV CF/SATA
The efa device first appeared in NetBSD 6.0.
The efa driver was written by Radoslaw Kujawa
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
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.
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 9.99 April 13, 2012 NetBSD 9.99