Re: [ECOS] [OT] SATA/SAS Chip attached to an AT91SAM9RL64 + Drivers?

Re: [ECOS] [OT] SATA/SAS Chip attached to an AT91SAM9RL64 + Drivers?

[Zimman, Chris]

> we have the need to attach 2-4 SAS drives (e.g. Seagate  ST373455SS)
> to an (maybe) AT91SAM9RL64 (it has 118 I/O) and while searching to
> death, I now ask here, if someone know a manufacturer of  SATA/SAS
> µChips  which can easyly attached?
> 
> Speed is no problem, we need only ultra reliable storage and Low-
> Energy.
> 
> Most Chips I have found are PCI based which I definitively can not use.
> 
> OR what about USB-SATA µChips?
> 
> The AT91SAM9R64 (is cheaper and only 49 I/O) has  a  USB 2.0  High-
> Speed controler, if I attach a USB-Hub chip (NXP?) to it and then 2-4
> of those USB/SATA converter?
> 
> Then I need to know, where to get those USB/SATA Converter chips!
> 
> I should note, that the WHOLE PCB can not be bigger then a 2"5 drive.

Are you sure you sent this to the right list?  This isn't really a list for
EE/PCB design although there is some crossover on occasion.
There are literally tons of multi port SATA controllers out there.

Maybe one of these can help you:

http://www.oxsemi.com/products/storage/das.html

--Chris

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[ECOS] Re: [OT] SATA/SAS Chip attached to an AT91SAM9RL64 + Drivers?

[Michelle Konzack]

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Am 2008-11-20 08:16:05, schrieb Zimman, Chris:
> Are you sure you sent this to the right list?

Yes, since I need one, which can be easyly integrated in eCos because  I
can not use Linux for it...  (requires more then 8 MByte of Flash)

> This isn't really a list for
> EE/PCB design although there is some crossover on occasion.
> There are literally tons of multi port SATA controllers out there.

Yeah, but how can somone find all thos chips?

fortunately I have gotten many cross-infos over NXP, Maxim and  National
otherwise I would have goten more problems...

> Maybe one of these can help you:
> 
> http://www.oxsemi.com/products/storage/das.html

Hmmm this looks already intesting...  Contacted...

Thanks, Greetings and nice Day/Evening
    Michelle Konzack
    Systemadministrator
    24V Electronic Engineer
    Tamay Dogan Network
    Debian GNU/Linux Consultant


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##################### Debian GNU/Linux Consultant #####################
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Re: [ECOS] Re: [OT] SATA/SAS Chip attached to an AT91SAM9RL64 + Drivers?

[Andrew Lunn]

> Yes, since I need one, which can be easyly integrated in eCos because  I
> can not use Linux for it...  (requires more then 8 MByte of Flash)

Something to remember. The Open eCos has no USB host support. If you
don't want to implement USB host support yourself you probably need to
talk to eCosCentric and licence there private eCos code which has the
Jingo USB protocol stack.

     Andrew

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RE: [ECOS] Re: [OT] SATA/SAS Chip attached to an AT91SAM9RL64 + Drivers?

[Zimman, Chris]

> Yes, since I need one, which can be easyly integrated in eCos because
> I can not use Linux for it...  (requires more then 8 MByte of Flash)

eCos is probably not a good fit for this type of application.  Neither are
most microcontrollers.
The data rates involved exceed the capabilities of most.

Linux and something like the Orion family from Marvell would be a much better
match.  Marvell isn't going to support a hobbyist or small scale project
though.
But designing a PCB w/ multiport SATA interconnects is also non-trivial since
it requires length matched diff pairs for the SATA lines and controlled
impedance.

--Chris

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[ECOS] Re: Re: [OT] SATA/SAS Chip attached to an AT91SAM9RL64 + Drivers?

[Michelle Konzack]

Am 2008-11-20 16:29:42, schrieb Andrew Lunn:
> > Yes, since I need one, which can be easyly integrated in eCos because  I
> > can not use Linux for it...  (requires more then 8 MByte of Flash)
> 
> Something to remember. The Open eCos has no USB host support. If you
> don't want to implement USB host support yourself you probably need to
> talk to eCosCentric and licence there private eCos code which has the
> Jingo USB protocol stack.

I know, but you know there prices?  --  They are realy heavy!

Thanks, Greetings and nice Day/Evening
    Michelle Konzack
    Systemadministrator
    24V Electronic Engineer
    Tamay Dogan Network
    Debian GNU/Linux Consultant


-- 
Linux-User #280138 with the Linux Counter, http://counter.li.org/
##################### Debian GNU/Linux Consultant #####################
Michelle Konzack   Apt. 917                  ICQ #328449886
+49/177/9351947    50, rue de Soultz         MSN LinuxMichi
+33/6/61925193     67100 Strasbourg/France   IRC #Debian (irc.icq.com)


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[ECOS] Re: [OT] SATA/SAS Chip attached to an AT91SAM9RL64 + Drivers?

[Michelle Konzack]

Am 2008-11-20 08:16:05, schrieb Zimman, Chris:
> Maybe one of these can help you:
> 
> http://www.oxsemi.com/products/storage/das.html

OK, while searching the website, I have encountered, that they have only
publicity for the chips but NO real infos like Datasheets or application
notes...

OK, no problem, I am contacting (phoning) "ActiveComp" in Munich/Germany
and...  <argh> to get the Datasheets you need to sign an NDA!

Tomorrow, an employee will me call back maybe for a better  solution  as
the USB based ones...

Thanks, Greetings and nice Day/Evening
    Michelle Konzack
    Systemadministrator
    24V Electronic Engineer
    Tamay Dogan Network
    Debian GNU/Linux Consultant


-- 
Linux-User #280138 with the Linux Counter, http://counter.li.org/
##################### Debian GNU/Linux Consultant #####################
Michelle Konzack   Apt. 917                  ICQ #328449886
+49/177/9351947    50, rue de Soultz         MSN LinuxMichi
+33/6/61925193     67100 Strasbourg/France   IRC #Debian (irc.icq.com)


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[ECOS] Re: Re: [OT] SATA/SAS Chip attached to an AT91SAM9RL64 + Drivers?

[Michelle Konzack]

Am 2008-11-20 11:02:17, schrieb Zimman, Chris:
> eCos is probably not a good fit for this type of application.  Neither are
> most microcontrollers.
> The data rates involved exceed the capabilities of most.

Hmmm the one from Oxford Semiconductors is based on ARM.

> Linux and something like the Orion family from Marvell would be a much better
> match.  Marvell isn't going to support a hobbyist or small scale project
> though.

I do not think 50000-100000 Computers are a small thing...

I have already problems to get 10000 AT91SAM9G20...  20 weeks lead time.

> But designing a PCB w/ multiport SATA interconnects is also non-trivial since
> it requires length matched diff pairs for the SATA lines and controlled
> impedance.

I know the specs...  I have all here and read.  I have already build  my
own PCI-SATA controller using a SIL and it works perfectly.

Thanks, Greetings and nice Day/Evening
    Michelle Konzack
    Systemadministrator
    24V Electronic Engineer
    Tamay Dogan Network
    Debian GNU/Linux Consultant


-- 
Linux-User #280138 with the Linux Counter, http://counter.li.org/
##################### Debian GNU/Linux Consultant #####################
Michelle Konzack   Apt. 917                  ICQ #328449886
+49/177/9351947    50, rue de Soultz         MSN LinuxMichi
+33/6/61925193     67100 Strasbourg/France   IRC #Debian (irc.icq.com)


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RE: [ECOS] Re: Re: [OT] SATA/SAS Chip attached to an AT91SAM9RL64 + Drivers?

[Zimman, Chris]

> Hmmm the one from Oxford Semiconductors is based on ARM.

Yes, but all it does is control functionality.  I very much doubt the ARM is
involved in actual bulk transport.

> I do not think 50000-100000 Computers are a small thing...
> 
> I have already problems to get 10000 AT91SAM9G20...  20 weeks lead
> time.

For semiconductor volumes, 50-100K is nothing.  If you place an order, I'm
sure that 20 weeks will come in by a lot.
No one is going to do a fab run just for 10K pieces.  Just at a guess, that's
probably no more than 3 wafers max.

> I know the specs...  I have all here and read.  I have already build
> my own PCI-SATA controller using a SIL and it works perfectly.

I don't understand why you seem so surprised about NDAs for data sheets then
and why you're trying 
to build a multiport SATA controller using microcontrollers that only support
USB FS anyway running 
an RTOS that has no support for any of the things that you need.

I apologize sincerely if I'm missing something here, but the entire thread so
far has had a distinct
"I've never done this before" ring to it.

--Chris

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