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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 |
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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: |
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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 | |
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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 | |
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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 | ||
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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 | |
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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 | |
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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> |