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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 por‐
			  table 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

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