NJATA(4)						   BSD Kernel Interfaces Manual 						  NJATA(4)

NAME

     njata -- Workbit NinjaATA-32 CardBus IDE controller driver

SYNOPSIS

     njata* at cardbus? function ?
     njata* at cardbus? function ? flags 0x01	  # with wait 0x01

DESCRIPTION

     The njata driver provides support for the following Workbit Bus-Master CardBus IDE controller chips:

	   NinjaATA-32Bi  CardBus / PCMCIA dual mode IDE controller (``DuoATA'').  This controller is mainly used for portable drives.	This
			  driver supports the CardBus mode.

	   NPATA-32	  CardBus IDE controller.  This controller is widely used for CardBus CompactFlash adapters.

     These controllers are capable of bus-mastering for ATA PIO transfer.  The njata driver uses the bus-mastering PIO transfer unless transfer
     buffer is unaligned, and significantly reduces CPU usage for PIO-only ATA devices compared with usual PIO transfer.

CONFIGURATION

     The optional flags parameter is the ``wait'' value for ATA transfers.  Some combinations of host and device may fail without flags parameter
     or flags 0x00.  In this case try adding wait values like flags 0x01 or flags 0x11 (the wait parameter is composed of two 4bit values).
     Smaller wait values should be faster.  Too long waits may cause transfer errors.

SEE ALSO

     ata(4), atapi(4), cardbus(4), intro(4), wd(4), wdc(4)

HISTORY

     The njata device driver first appeared in NetBSD 4.0.

AUTHORS

     ITOH Yasufumi

BSD
								 September 7, 2006							       BSD