Hi Charles,
Thanks very much for your insight. In parallel I came to the conclusion
that reverting to the (deprecated) /dev/hda-style driver would at least
be a workaround for now, without actually understanding why...
We don't even build those old-style drivers for BuC 4.x ("# CONFIG_IDE
is not set"), but we can...
Graziano: I am building a new kernel & initrd with the IDE modules right
now. I will mail you off-list with some new files to test.
dMb
On Wed, 2011-05-04 at 09:32 -0500, Charles Steinkuehler wrote:
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> Reviewing the details for the Soekris 4501, it uses the Elan 520 CPU,
> which does not have a built-in PCI HDD controller. While I was unable
> to find specifics on the Soekris site, the CF card is almost certainly
> mapped as a standard ISA programmed I/O IDE controller (no DMA). This
> will *NOT* show up on the PCI bus at all.
>
> I suspect you are encountering one of the following issues:
>
> * I do not believe the ISA IDE controller has been ported to the unified
> SCSI driver layer in the kernel. Have you tried accessing /dev/hda
> instead of /dev/sda?
>
> * It is possible the CF card is mapped to a non-standard memory location
> in the Elan memory map. If this is the case, you will need to either
> compile a custom driver or pass an address parameter to the IDE module
> when you load it. I was unable to find enough documentation on-line at
> the Soekris site to determine if this is a problem.
>
> On 5/3/2011 2:51 AM, Graziano Brioschi wrote:
> > hi David
> >
> > I cannot see messages related to "mounting" /dev/sda1....
> > I already post a query on soekris-tech mailing list about the IDE/ATA
> > driver; I'm waiting for suggestion from that list.
> >
> > Manual modprobe'ing "pata_amd" produce no result...
> >
> > Here the output of "cat /proc/pci" on a net4501 running BuC 3.1; also
> > on this 2.4 kernel there is not a separate entry for the disk controller.
> >
> > fw# cat pci
> > PCI devices found:
> > Bus 0, device 0, function 0:
> > Class 0600: PCI device 1022:3000 (rev 0).
> > Bus 0, device 17, function 0:
> > Class 0200: PCI device 10ec:8139 (rev 16).
> > IRQ 10.
> > Master Capable. Latency=63. Min Gnt=32.Max Lat=64.
> > I/O at 0xe000 [0xe0ff].
> > Non-prefetchable 32 bit memory at 0xa0000000 [0xa00000ff].
> > Bus 0, device 18, function 0:
> > Class 0200: PCI device 100b:0020 (rev 0).
> > IRQ 11.
> > Master Capable. Latency=63. Min Gnt=11.Max Lat=52.
> > I/O at 0xe100 [0xe1ff].
> > Non-prefetchable 32 bit memory at 0xa0001000 [0xa0001fff].
> > Bus 0, device 19, function 0:
> > Class 0200: PCI device 100b:0020 (rev 0).
> > IRQ 5.
> > Master Capable. Latency=63. Min Gnt=11.Max Lat=52.
> > I/O at 0xe200 [0xe2ff].
> > Non-prefetchable 32 bit memory at 0xa0002000 [0xa0002fff].
> > Bus 0, device 20, function 0:
> > Class 0200: PCI device 100b:0020 (rev 0).
> > IRQ 9.
> > Master Capable. Latency=63. Min Gnt=11.Max Lat=52.
> > I/O at 0xe300 [0xe3ff].
> > Non-prefetchable 32 bit memory at 0xa0003000 [0xa0003fff].
> > fw#
> >
> >
> > Thanks
> > Graziano
> >
> > Il 01/05/2011 23.10, davidMbrooke ha scritto:
> >> Hi Graziano,
> >>
> >> That's great news! At least we're making progress...
> >>
> >> For others reading this thread I should explain that I built Graziano a
> >> ELAN-specific kernel and initrd (with "CONFIG_X86_ELAN=y" instead of
> >> "CONFIG_M486=y") and that is what is now booting on the net4501. Looks
> >> like we're going to need an "elan" kernel variant like we have a "geode"
> >> kernel variant.
> >>
> >> I also get the "/init: eval: line 1: KCMD_libata.dma=0: not found" error
> >> when I specify that kernel command-line argument on a system that boots
> >> successfully so I think that is nothing to worry about.
> >>
> >> What you *should* be seeing are lines like:
> >> LINUXRC: Root: /dev/ram0
> >> LINUXRC: Looking for leaf.cfg...
> >> LINUXRC: Mounting /dev/sda1 on /var/lib/lrpkg/mnt as vfat
> >> LINUXRC: Sourcing leaf.cfg from /dev/sda1
> >> LINUXRC: Generating default dirs...
> >>
> >> I agree that all the evidence points to your IDE/ATA driver not loading.
> >>
> >> The "100b:0020" PCI devices are the National Semiconductor DP8381x
> >> Ethernet chips whereas the "1022:3000" device seems to be SC520 "ELAN
> >> Microcontroller PCI Host Bridge" (from http://www.pcidatabase.com/).
> >>
> >> lspci is not reporting the disk controller separately, which seems
> >> strange to me. On other machines I always see a separate PCI device for
> >> the disk controller.
> >>
> >> I suspect the solution will end up being to enable a further .config
> >> entry for the kernel, but the key is to know which one. The kernel
> >> options have changed a lot over the past few years.
> >>
> >> You might want to try manually modprobe'ing the pata_amd module, just in
> >> case that has any effect.
> >>
> >> Might also be worth a post to the soekris-tech mailing list to see if
> >> anyone there can advise on the 2.6.35.11 .config entries for a net4501.
> >>
> >> dMb
> >>
> >>
> >> On Sun, 2011-05-01 at 18:30 +0200, Graziano Brioschi wrote:
> >>> Thank you very much David!
> >>>
> >>> I have downloaded the elan kernel and the initrd.lrp from your site and
> >>> using these two new packages my system boot!
> >>> However the system does not complete the startup sequence, giving me he
> >>> following messages on my serial console:
> >>>
> >>> ........
> >>> [ 4.077117] Write protecting the kernel text: 1636k
> >>> [ 4.078275] Write protecting the kernel read-only data: 744k
> >>> [ 4.078275] Write protecting the kernel read-only data: 744k
> >>> LINUXRC: Bering - Initrd - 4.0.0 Rev 12 uClibc 0.9.30.3
> >>> LINUXRC: Parsing kernel command line...
> >>> /init: eval: line 1: KCMD_libata.dma=0: not found
> >>> LINUXRC: Loading modules...
> >>> LINUXRC: Root: /dev/ram0
> >>> LINUXRC: Looking for leaf.cfg...
> >>> LINUXRC: Generating default dirs...
> >>> LINUXRC: Generating /tmp& /var/log partitions ...
> >>> LINUXRC: PKGPATH is empty or unset. Can not install packages.
> >>> LINUXRC: LRP= is empty or unset. Can not install packages.
> >>> LINUXRC: chown and chmod /dev...
> >>> LINUXRC: Loaded Packages
> >>> LINUXRC: Creating new rootfs...
> >>> LINUXRC: Switch_root into new rootfs...
> >>> can't run '/etc/init.d/rcS': No such file or directory
> >>>
> >>> Please press Enter to activate this console.
> >>> .......
> >>>
> >>> I think that this probles is related to the IDE driver kernel that is
> >>> not present...
> >>> Here the content of "/linuxrc.err"
> >>>
> >>> / # cat linuxrc.err
> >>> Next iteration: Thu Jan 10 02:40:07 UTC 1980
> >>> Probing platform:rtc_cmos ... not found.
> >>> Probing platform:pcspkr ... not found.
> >>> Probing platform:serial8250 ... not found.
> >>> Probing pci:v00001022d00003000sv00000000sd00000000bc06sc00i00 ... not
> >>> found.
> >>> Probing pci:v0000100Bd00000020sv0000100Bsd00000020bc02sc00i00 ... not
> >>> found.
> >>> Probing pci:v0000100Bd00000020sv0000100Bsd00000020bc02sc00i00 ... not
> >>> found.
> >>> Probing pci:v0000100Bd00000020sv0000100Bsd00000020bc02sc00i00 ... not
> >>> found.
> >>> Successfully probed 0 modules for 7 modaliases, currently loaded:
> >>> Not tainted
> >>> vfat 6542 0 - Live 0xb483b000
> >>> fat 34532 1 vfat, Live 0xb4825000
> >>> isofs 17079 0 - Live 0xb4809000
> >>> / #
> >>>
> >>> and my "lsmod" output:
> >>>
> >>> / # lsmod
> >>> Not tainted
> >>> vfat 6542 0 - Live 0xb483b000
> >>> fat 34532 1 vfat, Live 0xb4825000
> >>> isofs 17079 0 - Live 0xb4809000
> >>> / #
> >>>
> >>> and, finally, my "lspci" output
> >>>
> >>> / # lspci
> >>> 00:00.0 Class 0600: 1022:3000
> >>> 00:12.0 Class 0200: 100b:0020
> >>> 00:13.0 Class 0200: 100b:0020
> >>> 00:14.0 Class 0200: 100b:0020
> >>> / # lspci -m
> >>> 00:00.0 "Class 0600" "1022" "3000" "0000" "0000"
> >>> 00:12.0 "Class 0200" "100b" "0020" "100b" "0020"
> >>> 00:13.0 "Class 0200" "100b" "0020" "100b" "0020"
> >>> 00:14.0 "Class 0200" "100b" "0020" "100b" "0020"
> >>> / #
> >>>
> >>> I try to load the "ata_generic" modules using modprobe (no problem
> >>> loading it) and make /dev/sda and /dev/sda[1-4] devices using mknod, but
> >>> I cannot mount my CF....
> >>>
> >>> I found on a tecnical list on soekris site
> >>> (http://old.nabble.com/Linux-IDE-driver-for-CF-card-td19766587.html)
> >>> that speaks about a "generic/default IDE driver":
> >>> ...
> >>> The CF card has started working after activating "generic/default *IDE*
> >>> chipset support (*IDE_GENERIC*)" support in the kernel. I guess this
> >>> driver doesn't support UDMA, but the "National SCx200 chipset support"
> >>> or "AMD CS5535 chipset support" drivers didn't work.
> >>> ....
> >>>
> >>> and an other document related to debian on net4501
> >>> (http://www.feep.org/weblogs/josh/archives/69-Debian-on-a-Soekris-net4501.html)
> >>> speaks about an "ide_generic" module that I cannot find on BuC 4.0:
> >>>
> >>> ....
> >>> Rebuild initramfs with ide_generic support.|
> >>> echo "ide_generic">> /etc/initramfs-tools/modules
> >>> update-initramfs -t -u
> >>> ....
> >>> |
> >>>
> >>> In few days I will install a linux build system and I will try to follow
> >>> the instructions in the wikies pages related to development.
> >>>
> >>> What do you think about this?
> >>> Thanks a lot for your time
> >>> cheers
> >>> graziano
> >>>
> >>>
> >>> Il 29/04/2011 12.35, davidMbrooke ha scritto:
> >>>> Hi Graziano,
> >>>>
> >>>> Ah, OK. I did not spot that some of your output was from the net4801...
> >>>>
> >>>> There is a kernel .config option "CONFIG_X86_ELAN" which is not set for
> >>>> our current 4.x builds. It is not completely clear to me what effect
> >>>> setting this will have, but it is worth a try. If this is indeed the
> >>>> problem we would add another kernel variant "elan" like we have already
> >>>> for i486, i686 and geode.
> >>>>
> >>>> In order to build a custom kernel you can follow the instructions at
> >>>> http://sourceforge.net/apps/mediawiki/leaf/index.php?title=Bering-uClibc_4.x_-_Developer_Guide_-_Preparing_the_Build_Environment
> >>>> and on subsequent pages. It is not particularly difficult if you already
> >>>> have a suitable Linux build host available. Once the buildenv is ready
> >>>> run "./buildtool.pl build linux" to build the standard kernels.
> >>>>
> >>>> Making the changes necessary for a custom kernel is not difficult but it
> >>>> is currently not documented in the Wiki. Once you get as far as building
> >>>> the standard kernel contact me directly for further advice. In the
> >>>> meantime I will also try to build a specific "elan" kernel for you to
> >>>> try.
> >>>>
> >>>> Regards,
> >>>> dMb
> >>>>
> >>>> On Fri, 2011-04-29 at 11:35 +0200, Graziano Brioschi wrote:
> >>>>> hi David
> >>>>>
> >>>>> I think there is a misunderstanding about the problem.
> >>>>> I have two machine:
> >>>>> - the first is a Soekris net4501 and on this machine the kernel does not
> >>>>> boot; I can see the syslinux output about loading of /syslinux/linux and
> >>>>> /initrd.lrp, but nothing more. The system hangs. On this system BuC3.1
> >>>>> runs correctly.
> >>>>> - the second is a Soekris net4801 that I boot using the same compact
> >>>>> flash generated for the first net4501 to verify that the compact flash
> >>>>> has not some kind of problem; BuC4.0 runs correctly without problems,
> >>>>> but I have seen the "libata.dma=0 not found" error.
> >>>>>
> >>>>> I hope the test environment is more clear now.
> >>>>> I think that there is a kind of incompatibility between the i486 kernel
> >>>>> and the AMD ELAN SC520 processor that is installed on net4501.
> >>>>> Is there a simple way to rebuild a kernel for the AMD ELAN CPU? Is a
> >>>>> difficult operation? Can I try to built it?
> >>>>>
> >>>>> thanks a lot
> >>>>> graziano
> >>>>>
> >>>>>
> >>>>
> >>>> ------------------------------------------------------------------------------
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> >>
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>
> - --
> Charles Steinkuehler
> char...@steinkuehler.net
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