1.. include:: <isonum.txt> 2 3====================== 4MIPS AU1XXX IDE driver 5====================== 6 7Released 2005-07-15 8 9About 10===== 11 12This file describes the 'drivers/ide/au1xxx-ide.c', related files and the 13services they provide. 14 15If you are short in patience and just want to know how to add your hard disc to 16the white or black list, go to the 'ADD NEW HARD DISC TO WHITE OR BLACK LIST' 17section. 18 19 20License 21======= 22 23:Copyright: |copy| 2003-2005 AMD, Personal Connectivity Solutions 24 25This program is free software; you can redistribute it and/or modify it under 26the terms of the GNU General Public License as published by the Free Software 27Foundation; either version 2 of the License, or (at your option) any later 28version. 29 30THIS SOFTWARE IS PROVIDED ``AS IS`` AND ANY EXPRESS OR IMPLIED WARRANTIES, 31INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 32FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 33BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39POSSIBILITY OF SUCH DAMAGE. 40 41You should have received a copy of the GNU General Public License along with 42this program; if not, write to the Free Software Foundation, Inc., 43675 Mass Ave, Cambridge, MA 02139, USA. 44 45Note: 46 for more information, please refer "AMD Alchemy Au1200/Au1550 IDE 47 Interface and Linux Device Driver" Application Note. 48 49 50Files, Configs and Compatibility 51================================ 52 53Two files are introduced: 54 55 a) 'arch/mips/include/asm/mach-au1x00/au1xxx_ide.h' 56 contains : struct _auide_hwif 57 58 - timing parameters for PIO mode 0/1/2/3/4 59 - timing parameters for MWDMA 0/1/2 60 61 b) 'drivers/ide/mips/au1xxx-ide.c' 62 contains the functionality of the AU1XXX IDE driver 63 64Following extra configs variables are introduced: 65 66 CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA 67 - enable the PIO+DBDMA mode 68 CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA 69 - enable the MWDMA mode 70 71 72Supported IDE Modes 73=================== 74 75The AU1XXX IDE driver supported all PIO modes - PIO mode 0/1/2/3/4 - and all 76MWDMA modes - MWDMA 0/1/2 -. There is no support for SWDMA and UDMA mode. 77 78To change the PIO mode use the program hdparm with option -p, e.g. 79'hdparm -p0 [device]' for PIO mode 0. To enable the MWDMA mode use the option 80-X, e.g. 'hdparm -X32 [device]' for MWDMA mode 0. 81 82 83Performance Configurations 84========================== 85 86If the used system doesn't need USB support enable the following kernel 87configs:: 88 89 CONFIG_IDE=y 90 CONFIG_BLK_DEV_IDE=y 91 CONFIG_IDE_GENERIC=y 92 CONFIG_BLK_DEV_IDEPCI=y 93 CONFIG_BLK_DEV_GENERIC=y 94 CONFIG_BLK_DEV_IDEDMA_PCI=y 95 CONFIG_BLK_DEV_IDE_AU1XXX=y 96 CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y 97 CONFIG_BLK_DEV_IDEDMA=y 98 99Also define 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to enable 100the burst support on DBDMA controller. 101 102If the used system need the USB support enable the following kernel configs for 103high IDE to USB throughput. 104 105:: 106 107 CONFIG_IDE_GENERIC=y 108 CONFIG_BLK_DEV_IDEPCI=y 109 CONFIG_BLK_DEV_GENERIC=y 110 CONFIG_BLK_DEV_IDEDMA_PCI=y 111 CONFIG_BLK_DEV_IDE_AU1XXX=y 112 CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y 113 CONFIG_BLK_DEV_IDEDMA=y 114 115Also undefine 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to 116disable the burst support on DBDMA controller. 117 118 119Acknowledgments 120=============== 121 122These drivers wouldn't have been done without the base of kernel 2.4.x AU1XXX 123IDE driver from AMD. 124 125Additional input also from: 126Matthias Lenk <matthias.lenk@amd.com> 127 128Happy hacking! 129 130Enrico Walther <enrico.walther@amd.com> 131