AU1xxx_IDE.README
1README for MIPS AU1XXX IDE driver - Released 2005-07-15
2
3ABOUT
4-----
5This file describes the 'drivers/ide/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 COMPATIBILITY
43--------------------------------
44
45Two files are introduced:
46
47 a) 'arch/mips/include/asm/mach-au1x00/au1xxx_ide.h'
48 contains : 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