| 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> |
