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gerrit-public.fairphone.software / kernel / msm-4.9 / ed8f68669a27287a3b15882e8d88ebccae75ec59 / . / Documentation / mips / AU1xxx_IDE.README
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Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]1README for MIPS AU1XXX IDE driver - Released 2005-07-15
2
3ABOUT
4-----
5This file describes the 'drivers/ide/mips/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
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300[diff] [blame]42FILES, CONFIGS AND COMPATIBILITY
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]43--------------------------------
44
45Two files are introduced:
46
Randy Dunlap07983f02009-01-06 14:42:41 -0800[diff] [blame]47 a) 'arch/mips/include/asm/mach-au1x00/au1xxx_ide.h'
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300[diff] [blame]48 contains : struct _auide_hwif
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]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
Bartlomiej Zolnierkiewicze86c1452009-01-14 19:19:03 +0100[diff] [blame]55Following extra configs variables are introduced:
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]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
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200[diff] [blame]60 controller
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]61
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]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
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]88CONFIG_BLK_DEV_IDEDMA=y
89CONFIG_IDEDMA_AUTO=y
90
Ralf Baechlea3c9dc32006-02-14 19:13:23 +0000[diff] [blame]91Also define 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to enable
92the burst support on DBDMA controller.
93
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]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
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]105CONFIG_BLK_DEV_IDEDMA=y
106CONFIG_IDEDMA_AUTO=y
107
Ralf Baechlea3c9dc32006-02-14 19:13:23 +0000[diff] [blame]108Also undefine 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to
109disable the burst support on DBDMA controller.
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]110
Pete Popov26a940e2005-09-15 08:03:12 +0000[diff] [blame]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>