git://bbs.cooldavid.org / net-next-2.6.git / blame
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1 | README for MIPS AU1XXX IDE driver - Released 2005-07-15 |
| 2 | ||
| 3 | ABOUT | |
| 4 | ----- | |
| 5 | This file describes the 'drivers/ide/mips/au1xxx-ide.c', related files and the | |
| 6 | services they provide. | |
| 7 | ||
| 8 | If you are short in patience and just want to know how to add your hard disc to | |
| 9 | the white or black list, go to the 'ADD NEW HARD DISC TO WHITE OR BLACK LIST' | |
| 10 | section. | |
| 11 | ||
| 12 | ||
| 13 | LICENSE | |
| 14 | ------- | |
| 15 | ||
| 16 | Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions | |
| 17 | ||
| 18 | This program is free software; you can redistribute it and/or modify it under | |
| 19 | the terms of the GNU General Public License as published by the Free Software | |
| 20 | Foundation; either version 2 of the License, or (at your option) any later | |
| 21 | version. | |
| 22 | ||
| 23 | THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, | |
| 24 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 25 | FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR | |
| 26 | BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 27 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 28 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 29 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 30 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 31 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 32 | POSSIBILITY OF SUCH DAMAGE. | |
| 33 | ||
| 34 | You should have received a copy of the GNU General Public License along with | |
| 35 | this program; if not, write to the Free Software Foundation, Inc., | |
| 36 | 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 37 | ||
| 38 | Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE | |
| 39 | Interface and Linux Device Driver" Application Note. | |
| 40 | ||
| 41 | ||
| 42 | FILES, CONFIGS AND COMPATABILITY | |
| 43 | -------------------------------- | |
| 44 | ||
| 45 | Two files are introduced: | |
| 46 | ||
| 07983f0e | 47 | a) 'arch/mips/include/asm/mach-au1x00/au1xxx_ide.h' |
| 26a940e2 | 48 | containes : struct _auide_hwif |
| 26a940e2 PP |
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 | ||
| e86c1451 | 55 | Following extra configs variables are introduced: |
| 26a940e2 PP |
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 | |
| 3a4fa0a2 | 60 | controller |
| 26a940e2 | 61 | |
| 26a940e2 PP |
62 | |
| 63 | SUPPORTED IDE MODES | |
| 64 | ------------------- | |
| 65 | ||
| 66 | The AU1XXX IDE driver supported all PIO modes - PIO mode 0/1/2/3/4 - and all | |
| 67 | MWDMA modes - MWDMA 0/1/2 -. There is no support for SWDMA and UDMA mode. | |
| 68 | ||
| 69 | To 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 | ||
| 74 | PERFORMANCE CONFIGURATIONS | |
| 75 | -------------------------- | |
| 76 | ||
| 77 | If the used system doesn't need USB support enable the following kernel configs: | |
| 78 | ||
| 79 | CONFIG_IDE=y | |
| 80 | CONFIG_BLK_DEV_IDE=y | |
| 81 | CONFIG_IDE_GENERIC=y | |
| 82 | CONFIG_BLK_DEV_IDEPCI=y | |
| 83 | CONFIG_BLK_DEV_GENERIC=y | |
| 84 | CONFIG_BLK_DEV_IDEDMA_PCI=y | |
| 85 | CONFIG_IDEDMA_PCI_AUTO=y | |
| 86 | CONFIG_BLK_DEV_IDE_AU1XXX=y | |
| 87 | CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y | |
| 26a940e2 PP |
88 | CONFIG_BLK_DEV_IDEDMA=y |
| 89 | CONFIG_IDEDMA_AUTO=y | |
| 90 | ||
| a3c9dc38 RB |
91 | Also define 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to enable |
| 92 | the burst support on DBDMA controller. | |
| 93 | ||
| 26a940e2 PP |
94 | If the used system need the USB support enable the following kernel configs for |
| 95 | high IDE to USB throughput. | |
| 96 | ||
| 97 | CONFIG_BLK_DEV_IDEDISK=y | |
| 98 | CONFIG_IDE_GENERIC=y | |
| 99 | CONFIG_BLK_DEV_IDEPCI=y | |
| 100 | CONFIG_BLK_DEV_GENERIC=y | |
| 101 | CONFIG_BLK_DEV_IDEDMA_PCI=y | |
| 102 | CONFIG_IDEDMA_PCI_AUTO=y | |
| 103 | CONFIG_BLK_DEV_IDE_AU1XXX=y | |
| 104 | CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y | |
| 26a940e2 PP |
105 | CONFIG_BLK_DEV_IDEDMA=y |
| 106 | CONFIG_IDEDMA_AUTO=y | |
| 107 | ||
| a3c9dc38 RB |
108 | Also undefine 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to |
| 109 | disable the burst support on DBDMA controller. | |
| 26a940e2 | 110 | |
| 26a940e2 PP |
111 | |
| 112 | ACKNOWLEDGMENTS | |
| 113 | --------------- | |
| 114 | ||
| 115 | These drivers wouldn't have been done without the base of kernel 2.4.x AU1XXX | |
| 116 | IDE driver from AMD. | |
| 117 | ||
| 118 | Additional input also from: | |
| 119 | Matthias Lenk <matthias.lenk@amd.com> | |
| 120 | ||
| 121 | Happy hacking! | |
| 122 | Enrico Walther <enrico.walther@amd.com> |