EFA(4) (amiga)

EFA(4) | Device Drivers Manual (amiga) | 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 controllers 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
ELBOX FastATA 1200 Mk-IV CF/SATA

# 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.

April 13, 2012 | NetBSD 9.4