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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>David,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Could you send a system.mhs file from the
EDK project you’re using so I can get a bearing on what exactly you have
in the hardware? I didn’t think the LL TEMAC could be used without the
DMA engine (CDMAC), which is where the interrupts come from in the
Linux/VxWorks drivers I’ve seen for this core.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>-Rick<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><b><font size=2 color=black
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;color:windowtext;
font-weight:bold'>From:</span></font></b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext'> David H. Lynch
Jr. [mailto:dhlii@dlasys.net] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Saturday, July 29, 2006 7:09
PM<br>
<b><span style='font-weight:bold'>To:</span></b> Rick Moleres<br>
<b><span style='font-weight:bold'>Cc:</span></b> linuxppc-embedded<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: Xilinx hard TEMAC</span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>Rick Moleres wrote: <o:p></o:p></span></font></p>
<pre style='margin-left:.5in' wrap=""><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>That is the correct distinction between "soft" and "hard". Just know<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>that in this case the "soft" TEMAC (whether LL TEMAC or PLB TEMAC) uses<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>the "hard" TEMAC, and the "hard" TEMAC by itself is not that useful.<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'> First,
thanks, your remarks have been enormously helpful.<br>
<br>
I have successfully put together a Driver for the TEMAC
currently used in the Pico E-12.<br>
<br>
I am still having some difficulty corresponding this TEMAC
implimentation to any of Xilinx's documentation.<br>
It is Exactly the TEMAC supported by the Xilinx uCOSII Treck
Web Server application.<br>
It seems to be extremely minimal. Basically a DCR interface
for most things that closely matches the GSRD documents.<br>
and TX and RX FIFO's that I can't seem to find documented
anywhere, but I have working based on the Treck WebServer code.<br>
<br>
I am have two remaining problems and then I am done.<br>
<br>
The first is I am currently doing polled I/O.
The transmits happen as they are requested and the receives are picked up ona a
timer interrupt.<br>
But I am dropping about 50% or more of the receives. I will
work that out myself eventually.<br>
<br>
The second is that this driver will serve as
the basis for a driver in other Pico supported OS's. Some of which have no
means of doing Polled Receives.<br>
And I can not get interrupts working. Since my
hardware does nto match anything perfectly - except that Treck Webserver
application and that does not do interrupts.<br>
I am reading all the Xilinx TEMAC Documents and the GSRD
documents reference an IRENABLE register and an IRSTATUS register, I cobbled
something together <br>
assuming that they were access much as the other DCR
registers in that block and I assumed the bits in IRSTATUS and IRENABLE matched
the definitions of those <br>
in larger TEMAC implimentations. It appeared after I enabled
TX and RX complete interrupts that when I have received data available the
IRSTATUS register has the <br>
Bit set for an Rx interrupt. All fine - except that no
interrupt actually occurs.<br>
I can force interrupts from the PHY using the same IRQ so
the IRQ is connected correctly and programmed correctly. Other TEMAC
implimentations seem to have a GIE - Global Interrupt enable<br>
Bit, but I do not have a clue where to look here. What I
could get out of the Xilinx Webset GSRD seems to be a Linux driver that uses
the DMA unit and that generates its own interrupts.<br>
I don't think I have the DMA in my bit image.<br>
<br>
Anyway any clues as to where I can find some useful docs on
Interrupt handling for the LL_TEMAC that is used by the uCOSII WebServer
application ?<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<o:p></o:p></span></font></p>
<pre style='margin-left:.5in' wrap=""><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt'>Thereis a Linux driver for the LL_TEMAC that comes with GSRD, but my<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'> <o:p></o:p></span></font></pre><pre
style='margin-left:.5in' wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>group's efforts go toward the PLB_TEMAC as that is the EDK IP we want to<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'> <o:p></o:p></span></font></pre><pre
style='margin-left:.5in' wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>promote and whose drivers we'd like to see in kernel.org.<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>You should be able to go to <a
href="http://www.xilinx.com/gsrd">http://www.xilinx.com/gsrd</a> to get the GSRD<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>design, and inside of that design somewhere you'll find a Linux 2.4<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>driver for the LL TEMAC.<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'> <o:p></o:p></span></font></pre><pre
style='margin-left:.5in' wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>Linuxppc-embedded mailing list<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><a href="mailto:Linuxppc-embedded@ozlabs.org">Linuxppc-embedded@ozlabs.org</a><o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><a
href="https://ozlabs.org/mailman/listinfo/linuxppc-embedded">https://ozlabs.org/mailman/listinfo/linuxppc-embedded</a><o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'><br>
<br>
<br>
<o:p></o:p></span></font></p>
<pre style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>-- <o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>Dave Lynch DLA Systems<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>Software Development: Embedded Linux<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>717.627.3770 <a
href="mailto:dhlii@dlasys.net">dhlii@dlasys.net</a> <a
href="http://www.dlasys.net">http://www.dlasys.net</a><o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>fax: 1.253.369.9244 Cell: 1.717.587.7774<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>Over 25 years' experience in platforms, languages, and technologies too numerous to list.<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>"Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction."<o:p></o:p></span></font></pre><pre
style='margin-left:.5in'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>Albert Einstein<o:p></o:p></span></font></pre></div>
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