Hardware support for AMD Geode CS5536 audio?

[Alec Kloss-4]

I'm hoping someone will be able to help me out with the audio is
the Geode CS5536.  This has come up a few times before, once early
this month and once last February.  The CS5530 driver mentioned on
the soundsystem wiki doesn't work.  I've fixed the obvious
compatibility problems with it and RELENG_7 so it loads, but
bus_alloc_resource() fails during attach.  Not being much of a
kernel hacker, I'm at a loss as to why that is.  
The databooks from AMD for the CS5536 and from National for the
CS5530 are publically available.  Below are links:

Original FreeBSD gx5530 driver:
        http://63.249.85.132/gx_audio/index.html

My patches for RELENG_7 compatibility:
        http://setfilepointer.com/pub/geode/ns_geode.diff

The CS5530 datasheet from National Semiconductor:
        http://www.national.com/mpf/CS/CS5530A.html

The CS5536 datasheet from AMD:
        http://www.amd.com/us-en/ConnectivitySolutions/ProductInformation/0,,50_2330_9863_9864^13054,00.html

I'd be happy to try whatever people suggest, or even provide access
to a RELENG_7 or -current machine running this hardware.  Remote
debugging options are limited because there are no serial ports on
this hardware.  If you're interested access to a machine, mail me
an ssh public key.  

Thanks much.

--
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[Bruce R. Montague]

 Hi, re this from Alec Kloss, 21 Jan 2008:

 > I'm hoping someone will be able to help me out with the audio is
 > the Geode CS5536.  This has come up a few times before, once early
 > this month and once last February.  The CS5530 driver mentioned on
 > the soundsystem wiki doesn't work.
 >
 > ...
 >
 > Original FreeBSD gx5530 driver:
 > ...

Hi, I wrote the geode audio driver for the CS5530
(found at the mentioned link), a good while back,
I think for FreeBSD 4.x.

This week is the first time I've received any feedback
on this driver, a couple of pings along the line of
the above. I honestly hadn't realized anybody was
using it (I guess that's the problem with it working).
If there was a thread last february, I must have
missed it. I dont think I've ever seen the soundsystem
wiki.

I would try to fix/upgrade this driver if I had any
hardware with a CS5536, but I don't. That said, can
anyone recomend a cheap system that includes the
CS5536, is generally available, doesn't cost very
much and can be used as a minimal dev platform?
(Surely all the OLPC work has made some interesting
such systems available?) Or would anyone want to
donate a "free" current AMD Geode reference
platform? :)

Even with hardware, it would probably be at least
a month before I had time to look at it. Someone
who knew FreeBSD drivers could probably fix it in
a few compiles, if 5536 device-specific initialization
is the problem.

I only vaguely recall some of the initialization
issues---I think there is a "magic bitmask" that has
to be passed to the hypervisor (perhaps indirectly)
to tell the hypervisor what _not_ to manage, so the
FreeBSD driver will be able to manage it. I really
hope this interface requirement is documented better
for the CS5536 than the 5530, but maybe things weren't
as bad as I remember. I think there can be a lot of
dependencies between the CPU step, BIOS version,    
hypervisor version and southbridge (5536) version.

It's kind of interesting to note that the Geode had
a "hypervisor in the firmware" about a decade ago,
somewhat similar to the manner that folks like VMware
are now starting to do with ESX 3i "hardware-integrated
hypervisor", etc...  (the Geode hypervisor did not
provide multiple CPU instances, rather virtual
devices).


 -bruce

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[Alec Kloss-6]

On 2008-01-22 22:34, Bruce R. Montague wrote:

>
> Hi, I wrote the geode audio driver for the CS5530
> (found at the mentioned link), a good while back,
> I think for FreeBSD 4.x.
>
> This week is the first time I've received any feedback
> on this driver, a couple of pings along the line of
> the above. I honestly hadn't realized anybody was
> using it (I guess that's the problem with it working).
> If there was a thread last february, I must have
> missed it. I dont think I've ever seen the soundsystem
> wiki.

http://wiki.freebsd.org/soundsystem

My googling may be mistaken about a thread last February.

> I would try to fix/upgrade this driver if I had any
> hardware with a CS5536, but I don't. That said, can
> anyone recomend a cheap system that includes the
> CS5536, is generally available, doesn't cost very
> much and can be used as a minimal dev platform?
> (Surely all the OLPC work has made some interesting
> such systems available?) Or would anyone want to
> donate a "free" current AMD Geode reference
> platform? :)

The specific device I'm targeting is a "koolu",
http://www.koolu.com.  Nice Canadians, $200 US for a unit without a
drive.  Very linuxy.  Unfortunately, it has no serial ports, so
debugging is pretty limited.  I can donate network access to one,
and can loan you one for the duration of your work on it.  If you
want network access, email me an ssh key off-list, or if you want
one to put your hands on, email me an address off-list.

> Even with hardware, it would probably be at least
> a month before I had time to look at it. Someone
> who knew FreeBSD drivers could probably fix it in
> a few compiles, if 5536 device-specific initialization
> is the problem.

Beggars can't be choosers, so any time you donate to this project
would be appreciated by me anyway.


--
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PGP key at http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xA241980E
"No Bunny!" -- Simon, from Frisky Dingo

[Rink Springer-3]

Hi Bruce,

On Tue, Jan 22, 2008 at 10:34:00PM -0800, Bruce R. Montague wrote:
> This week is the first time I've received any feedback
> on this driver, a couple of pings along the line of
> the above. I honestly hadn't realized anybody was
> using it (I guess that's the problem with it working).
> If there was a thread last february, I must have
> missed it. I dont think I've ever seen the soundsystem
> wiki.

Hmm, I have pinged ariff@ on whether he was working on a driver for this
chipset (haven't heard a reply tho), as I heard some people claiming he
might...

> I would try to fix/upgrade this driver if I had any
> hardware with a CS5536, but I don't. That said, can
> anyone recomend a cheap system that includes the
> CS5536, is generally available, doesn't cost very
> much and can be used as a minimal dev platform?
> (Surely all the OLPC work has made some interesting
> such systems available?) Or would anyone want to
> donate a "free" current AMD Geode reference
> platform? :)

Well, I intend to take a look, as I have hardware - I've got FreeBSD
running on a Compaq Evo T30 recently, which has such a sound IC. Too bad
the USB doesn't quite work well (chipset bugs; only Linux has a patch
for them...)

I can also setup serial console access to it if desired, but mind that
it only has 32MB memory so you can't build anything on it... let me know
if this is acceptable, the machine runs 8-CURRENT.

Cheers,

--
Rink P.W. Springer                                - http://rink.nu
"Anyway boys, this is America. Just because you get more votes doesn't
 mean you win." - Fox Mulder
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[Achim Patzner]

Am 23.01.2008 um 12:09 schrieb Alec Kloss:
> On 2008-01-22 22:34, Bruce R. Montague wrote:
>> I would try to fix/upgrade this driver if I had any
>> hardware with a CS5536, but I don't.

> The specific device I'm targeting is a "koolu",
> http://www.koolu.com.

Or take a look at http://www.fit-pc.com/

> Unfortunately, it has no serial ports, so
> debugging is pretty limited.

The Fit-PC has one. Or at least a sorry excuse for a serial port.

Just getting it to you might be even more expensive than buying
it somewhere closer to you.


Achim

[Ivan Voras-7]

Bruce R. Montague wrote:

> I would try to fix/upgrade this driver if I had any
> hardware with a CS5536, but I don't. That said, can
> anyone recomend a cheap system that includes the
> CS5536, is generally available, doesn't cost very
> much and can be used as a minimal dev platform?
> (Surely all the OLPC work has made some interesting
> such systems available?) Or would anyone want to
> donate a "free" current AMD Geode reference
> platform? :)

Can't help you with the hardware but I'm also interested in sound
working on it and can test patches and provide remote access. I'm using
fit-pc (http://www.fit-pc.com/), costs $300.

[Bruce R. Montague]

Hi, re:

 > I'm hoping someone will be able to help me out with the audio is
 > the Geode CS5536.

Those AMD Geode systems with the CS5536 look almost
cheap enough to afford one for each hand.  I'll  
look into upgrading the 5530 audio driver for the
5536, but it will take sometime. If someone does  
it over the weekend, or somesuch, let me know...
(likewise if anyone has other advice on good
current Geode kernel development platforms).


 -bruce

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[Wilko Bulte]

Quoting Bruce R. Montague, who wrote on Wed, Jan 23, 2008 at 10:06:51PM -0800 ..

>
> Hi, re:
>
>  > I'm hoping someone will be able to help me out with the audio is
>  > the Geode CS5536.
>
> Those AMD Geode systems with the CS5536 look almost
> cheap enough to afford one for each hand.  I'll  
> look into upgrading the 5530 audio driver for the
> 5536, but it will take sometime. If someone does  
> it over the weekend, or somesuch, let me know...
> (likewise if anyone has other advice on good
> current Geode kernel development platforms).

I shipped Ariff@ a Geode based box quite a while a ago to support
the audio driver work.  I don't think he got around to working on it though.

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[ancelgray]

Bruce,

This is Andrew Gray.  I am running an Alix-1C board with the CS5536 on it.
This board is very nice.  It's only about $138 and it has a good "standard"
clone AWARD bios that we are all used to (unlike say, the Soekris boards).
It uses only 5 watts and has everthing including 21 GPIO pins.
(except is doesn't have a Freebsd sound driver yet.  Also 3.3V SB audigy SB0090 PCI
sound cards don't seem to work in its 3.3V PCI slot).  It has  serial ports (COM1 & 2)
for debug and it has plenty of RAM. It runs at 500 Mhz, so it is fast enough to compile
a sound driver. (It takes about 20 seconds).  It has a 44-pin laptop IDE interface
(ribbon cable has smaller spacing), so you need a 44 pin to 40 pin adapter
cable if you want to run a regular HD, and you must power the regular hard
drive from SOME OTHER power supply.  ALternatively, you can put a 4 meg
compact flash in its bay, and just use it as a flash HD.  This works fine:

http://www.mini-box.com/Alix-1C-Board-1-LAN-1-MINI-PCI?sc=8&category=754

A question for you?  Do Freebsd 4.6 drivers still work on freebsd 6.2 and 7.0?

Are you working on this CS5536 driver?  Do you have hardware yet?

Andrew Gray

ancelgray  "AT"  y a h o o "dot" c o m



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[Bruce R. Montague]

Hi, re:
 

>
> Bruce,
>
> This is Andrew Gray.  I am running an Alix-1C board with the CS5536 on it.
> This board is very nice.  It's only about $138 and it has a good "standard"
> clone AWARD bios that we are all used to (unlike say, the Soekris boards).
> It uses only 5 watts and has everthing including 21 GPIO pins.
> (except is doesn't have a Freebsd sound driver yet.
> <---snip--->
>
> http://www.mini-box.com/Alix-1C-Board-1-LAN-1-MINI-PCI?sc=8&category=754

Looks like a nice board, close to the reference
platform, and has exposed audio (unlike some of the
Geode-based embedded systems). Looks like a decent
CS5536 audio development platform. Its use of the
CS5536 is not apparent from a casual skim of the
web-page, thanks, I would not have known about it
if not for your mail.


>
> A question for you?  Do Freebsd 4.6 drivers still work on freebsd 6.2 and 7.0?

Not sure, I haven't had relevant Geode hardware up
for awhile...  I'd be rather surprised if even for
the CS5530 something hadn't changed or needed
tweaking, but I don't know.

>
> Are you working on this CS5536 driver?  Do you have hardware yet?
>

I don't have hardware, but I've just ordered an
Alix-1C. :)

I haven't been working on this. I had googled for
a few days without finding anything that looked
like a convenient dev platform (mostly closed
embedded systems). I also came across info at AMD's
site that implied the CS5536 had been end-of-lifed
and that made me a bit depressed. Does anyone know,
BTW, if this is the case?

When I get this Alix-1C I will try to get something
up. But it will definitely just be in "all-too-infrequent
spare-time cycles between real-life and dayjob",  
so we're talking weekend-and-late-night-hobby here.
If anyone such as yourself want to hack away on it,
that would be great too. I'll try to stay in touch.

Thanks,

-bruce

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[ancelgray]

OK,

After doing a little more reading, I see that a DOS test program is impossible because
the MSR registers for the audio controller are accessed in protected mode only.  
There actually are opcoded assembler instructions to access the MSR's:

RDMSR
WRMSR

This is a show stopper in DOS.

This is gonna take a little patience.


Andrew

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[ancelgray]

To All,

I finally have a working CS5536 audio driver for FreeBSD 6.2.  The filename is snd_amd5536.ko and I will be making it available shortly.  I have been using an ALIX-1C motherboard for my testing.  Anyone have other hardware that they want to test it on?

Another question.  How does one get the FreeBSD people to put this driver into their OS?


Andrew Gray

ancelgray  "A T" y a h o o   "D O T" c o m

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[ancelgray]

To All,

I finally have a working CS5536 audio driver for FreeBSD 6.2.  The filename is snd_amd5536.ko and I will be making it available shortly.  I have been using an ALIX-1C motherboard for my testing.  Anyone have other hardware that they want to test it on?

Another question.  How does one get the FreeBSD people to put this driver into their OS?


Andrew Gray

ancelgray  "A T" y a h o o   "D O T" c o m

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[Alexander Leidinger]

Quoting ancelgray@... (from Thu, 2 Oct 2008 05:05:12 -0400):

> To All,
>
> I finally have a working CS5536 audio driver for FreeBSD 6.2.  The  
> filename is snd_amd5536.ko and I will be making it available  
> shortly.  I have been using an ALIX-1C motherboard for my testing.  
> Anyone have other hardware that they want to test it on?
>
> Another question.  How does one get the FreeBSD people to put this  
> driver into their OS?

You have to generate a patch for 8-current and send it to  
multimedia@... for review. There may be some improvement  
suggestions or bug reports then. Fix the issues and generate a new  
patch. When there are no issues anymore, send a PR (problem report)  
with your patch. If you are lucky, a committer will take care of the  
PR (or he may already approach you before you send the PR).

Bye,
Alexander.

--
It has long been an axiom of mine that the
little things are infinitely the most important.
                -- Sir Arthur Conan Doyle, "A Case of Identity"

http://www.Leidinger.net    Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org       netchild @ FreeBSD.org  : PGP ID = 72077137
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[Joel Dahl]

ancelgray@... skrev:
> Another question.  How does one get the FreeBSD people to put this
 > driver into their OS?

Make the source code available somewhere and hopefully someone (usually
ariff@ or mav@) with knowledge about the sound subsystem will review it.

Just make sure that you follow our usual style(9) guidelines etc etc.

--
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[Alec Kloss-10]

On 2008-10-02 05:05, ancelgray@... wrote:
> To All,
>
> I finally have a working CS5536 audio driver for FreeBSD 6.2.  The filename is snd_amd5536.ko and I will be making it available shortly.  I have been using an ALIX-1C motherboard for my testing.  Anyone have other hardware that they want to test it on?

[chop]

I've got hardware I'd like to test on, but it's either running
8-CURRENT or 7-STABLE, not 6.x.  Once source code is available, I'd
be happy to take a shot at porting it up to the newer codebase.

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[ancelgray]

To AMD CS5536 users:

This is Andrew Gray.  I have finished the audio driver for the AMD CS5536 companion
chip. It is working on a  PC Engines Alix 1C low power board under FreeBSD 7.0.  
It can be found at:

http://modelofreality.org/snd_amd5536.html

Let me know how it goes.

Andrew Gray

ancelgray AT y a h o o  DOT com

[Patrick Lamaiziere]

Le Wed, 26 Nov 2008 19:30:41 -0800 (PST),
ancelgray <ancelgray@...> a écrit :

Hi,
 
> To AMD CS5536 users:
>
> This is Andrew Gray.  I have finished the audio driver for the AMD
> CS5536 companion
> chip. It is working on a  PC Engines Alix 1C low power board under
> FreeBSD 7.0.  
> It can be found at:
>
> http://modelofreality.org/snd_amd5536.html
 
You cannot include a file under the GPL license without being
contaminated. Even a simple .h with only some #define.

I suggest you to use the #define from the auglx OpenBSD's driver,
it's free and better documented.

http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/arch/i386/pci/auglx.c

I don't have the hardware to test.

My 0,02 euros.

Regards.
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[Dag-Erling Smørgrav]

Patrick Lamaizière <patfbsd@...> writes:
> You cannot include a file under the GPL license without being
> contaminated.  Even a simple .h with only some #define.

On the contrary, as was settled in SCO v. IBM, constant and structure
definitions are not copyrightable if they are dictated by external
factors, such as compatibility with existing software or hardware.

There are even cases in which actual code is not copyrightable,
specifically if the algorithm it implements is so simple that no
reasonable programmer would have implemented it in any other way.

(SCO tried to argue, among other things, that Linux had stolen errno.h
from SCO Unix)

DES
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[Carlos A. M. dos Santos]

On Fri, Nov 28, 2008 at 7:43 AM, Dag-Erling Smørgrav <des@...> wrote:
> Patrick Lamaizière <patfbsd@...> writes:
>> You cannot include a file under the GPL license without being
>> contaminated.  Even a simple .h with only some #define.

This is not correct, as DES explained. Anyway, the amd5536.h file has
a much more serious problem: it contains a license statement but not
the name of the copyright owner, which is mandatory. Anonymous
contents can not be licensed.

> On the contrary, as was settled in SCO v. IBM, constant and structure
> definitions are not copyrightable if they are dictated by external
> factors, such as compatibility with existing software or hardware.
>
> There are even cases in which actual code is not copyrightable,
> specifically if the algorithm it implements is so simple that no
> reasonable programmer would have implemented it in any other way.
>
> (SCO tried to argue, among other things, that Linux had stolen errno.h
> from SCO Unix)
>
> DES
> --
> Dag-Erling Smørgrav - des@...

I mostly agree with you, but considering my previous experiences with
GPL-ed header files and their copyright owners(1), I would prefer not
to take the risk.

Reference

1. http://cvsweb.xfree86.org/cvsweb/xc/lib/GLw/README.txt?rev=1.2

--
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make clean
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