README for MIPS AU1XXX IDE driver - Released 2005-07-15
  
  ABOUT
  -----
  This file describes the 'drivers/ide/mips/au1xxx-ide.c', related files and the
  services they provide.
  
  If you are short in patience and just want to know how to add your hard disc to
  the white or black list, go to the 'ADD NEW HARD DISC TO WHITE OR BLACK LIST'
  section.
  
  
  LICENSE
  -------
  
  Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions
  
  This program is free software; you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free Software
  Foundation; either version 2 of the License, or (at your option) any later
  version.
  
  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  POSSIBILITY OF SUCH DAMAGE.
  
  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  675 Mass Ave, Cambridge, MA 02139, USA.
  
  Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE
        Interface and Linux Device Driver" Application Note.

  FILES, CONFIGS AND COMPATIBILITY

  --------------------------------
  
  Two files are introduced:

    a) 'arch/mips/include/asm/mach-au1x00/au1xxx_ide.h'

       contains : struct _auide_hwif

                   timing parameters for PIO mode 0/1/2/3/4
                   timing parameters for MWDMA 0/1/2
  
    b) 'drivers/ide/mips/au1xxx-ide.c'
       contains the functionality of the AU1XXX IDE driver

  Following extra configs variables are introduced:

  
    CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA    - enable the PIO+DBDMA mode
    CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA  - enable the MWDMA mode
    CONFIG_BLK_DEV_IDE_AU1XXX_BURSTABLE_ON - set Burstable FIFO in DBDMA

                                             controller

  
  SUPPORTED IDE MODES
  -------------------
  
  The AU1XXX IDE driver supported all PIO modes - PIO mode 0/1/2/3/4 - and all
  MWDMA modes - MWDMA 0/1/2 -. There is no support for SWDMA and UDMA mode.
  
  To change the PIO mode use the program hdparm with option -p, e.g.
  'hdparm -p0 [device]' for PIO mode 0. To enable the MWDMA mode use the option
  -X, e.g. 'hdparm -X32 [device]' for MWDMA mode 0.
  
  
  PERFORMANCE CONFIGURATIONS
  --------------------------
  
  If the used system doesn't need USB support enable the following kernel configs:
  
  CONFIG_IDE=y
  CONFIG_BLK_DEV_IDE=y
  CONFIG_IDE_GENERIC=y
  CONFIG_BLK_DEV_IDEPCI=y
  CONFIG_BLK_DEV_GENERIC=y
  CONFIG_BLK_DEV_IDEDMA_PCI=y
  CONFIG_IDEDMA_PCI_AUTO=y
  CONFIG_BLK_DEV_IDE_AU1XXX=y
  CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y

  CONFIG_BLK_DEV_IDEDMA=y
  CONFIG_IDEDMA_AUTO=y

  Also define 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to enable
  the burst support on DBDMA controller.

  If the used system need the USB support enable the following kernel configs for
  high IDE to USB throughput.
  
  CONFIG_BLK_DEV_IDEDISK=y
  CONFIG_IDE_GENERIC=y
  CONFIG_BLK_DEV_IDEPCI=y
  CONFIG_BLK_DEV_GENERIC=y
  CONFIG_BLK_DEV_IDEDMA_PCI=y
  CONFIG_IDEDMA_PCI_AUTO=y
  CONFIG_BLK_DEV_IDE_AU1XXX=y
  CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y

  CONFIG_BLK_DEV_IDEDMA=y
  CONFIG_IDEDMA_AUTO=y

  Also undefine 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to
  disable the burst support on DBDMA controller.

  
  ACKNOWLEDGMENTS
  ---------------
  
  These drivers wouldn't have been done without the base of kernel 2.4.x AU1XXX
  IDE driver from AMD.
  
  Additional input also from:
  Matthias Lenk <matthias.lenk@amd.com>
  
  Happy hacking!
  Enrico Walther <enrico.walther@amd.com>