LXR linux/Documentation/mips/AU1xxx

   1README for MIPS AU1XXX IDE driver - Released 2005-07-15
   2
   3ABOUT
   4-----
   5This file describes the 'drivers/ide/mips/au1xxx-ide.c', related files and the
   6services they provide.
   7
   8If you are short in patience and just want to know how to add your hard disc to
   9the white or black list, go to the 'ADD NEW HARD DISC TO WHITE OR BLACK LIST'
  10section.
  11
  12
  13LICENSE
  14-------
  15
  16Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions
  17
  18This program is free software; you can redistribute it and/or modify it under
  19the terms of the GNU General Public License as published by the Free Software
  20Foundation; either version 2 of the License, or (at your option) any later
  21version.
  22
  23THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  24INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  25FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
  26BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32POSSIBILITY OF SUCH DAMAGE.
  33
  34You should have received a copy of the GNU General Public License along with
  35this program; if not, write to the Free Software Foundation, Inc.,
  36675 Mass Ave, Cambridge, MA 02139, USA.
  37
  38Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE
  39      Interface and Linux Device Driver" Application Note.
  40
  41
  42FILES, CONFIGS AND COMPATABILITY
  43--------------------------------
  44
  45Two files are introduced:
  46
  47  a) 'arch/mips/include/asm/mach-au1x00/au1xxx_ide.h'
  48     containes : struct _auide_hwif
  49                 timing parameters for PIO mode 0/1/2/3/4
  50                 timing parameters for MWDMA 0/1/2
  51
  52  b) 'drivers/ide/mips/au1xxx-ide.c'
  53     contains the functionality of the AU1XXX IDE driver
  54
  55Following extra configs variables are introduced:
  56
  57  CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA    - enable the PIO+DBDMA mode
  58  CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA  - enable the MWDMA mode
  59  CONFIG_BLK_DEV_IDE_AU1XXX_BURSTABLE_ON - set Burstable FIFO in DBDMA
  60                                           controller
  61
  62
  63SUPPORTED IDE MODES
  64-------------------
  65
  66The AU1XXX IDE driver supported all PIO modes - PIO mode 0/1/2/3/4 - and all
  67MWDMA modes - MWDMA 0/1/2 -. There is no support for SWDMA and UDMA mode.
  68
  69To change the PIO mode use the program hdparm with option -p, e.g.
  70'hdparm -p0 [device]' for PIO mode 0. To enable the MWDMA mode use the option
  71-X, e.g. 'hdparm -X32 [device]' for MWDMA mode 0.
  72
  73
  74PERFORMANCE CONFIGURATIONS
  75--------------------------
  76
  77If the used system doesn't need USB support enable the following kernel configs:
  78
  79CONFIG_IDE=y
  80CONFIG_BLK_DEV_IDE=y
  81CONFIG_IDE_GENERIC=y
  82CONFIG_BLK_DEV_IDEPCI=y
  83CONFIG_BLK_DEV_GENERIC=y
  84CONFIG_BLK_DEV_IDEDMA_PCI=y
  85CONFIG_IDEDMA_PCI_AUTO=y
  86CONFIG_BLK_DEV_IDE_AU1XXX=y
  87CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y
  88CONFIG_BLK_DEV_IDEDMA=y
  89CONFIG_IDEDMA_AUTO=y
  90
  91Also define 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to enable
  92the burst support on DBDMA controller.
  93
  94If the used system need the USB support enable the following kernel configs for
  95high IDE to USB throughput.
  96
  97CONFIG_BLK_DEV_IDEDISK=y
  98CONFIG_IDE_GENERIC=y
  99CONFIG_BLK_DEV_IDEPCI=y
 100CONFIG_BLK_DEV_GENERIC=y
 101CONFIG_BLK_DEV_IDEDMA_PCI=y
 102CONFIG_IDEDMA_PCI_AUTO=y
 103CONFIG_BLK_DEV_IDE_AU1XXX=y
 104CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y
 105CONFIG_BLK_DEV_IDEDMA=y
 106CONFIG_IDEDMA_AUTO=y
 107
 108Also undefine 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to
 109disable the burst support on DBDMA controller.
 110
 111
 112ACKNOWLEDGMENTS
 113---------------
 114
 115These drivers wouldn't have been done without the base of kernel 2.4.x AU1XXX
 116IDE driver from AMD.
 117
 118Additional input also from:
 119Matthias Lenk <matthias.lenk@amd.com>
 120
 121Happy hacking!
 122Enrico Walther <enrico.walther@amd.com>
 123