David,
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. -Rick ________________________________ From: David H. Lynch Jr. [mailto:[EMAIL PROTECTED] Sent: Saturday, July 29, 2006 7:09 PM To: Rick Moleres Cc: linuxppc-embedded Subject: Re: Xilinx hard TEMAC Rick Moleres wrote: That is the correct distinction between "soft" and "hard". Just know that in this case the "soft" TEMAC (whether LL TEMAC or PLB TEMAC) uses the "hard" TEMAC, and the "hard" TEMAC by itself is not that useful. First, thanks, your remarks have been enormously helpful. I have successfully put together a Driver for the TEMAC currently used in the Pico E-12. I am still having some difficulty corresponding this TEMAC implimentation to any of Xilinx's documentation. It is Exactly the TEMAC supported by the Xilinx uCOSII Treck Web Server application. It seems to be extremely minimal. Basically a DCR interface for most things that closely matches the GSRD documents. 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. I am have two remaining problems and then I am done. 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. But I am dropping about 50% or more of the receives. I will work that out myself eventually. 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. 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. I am reading all the Xilinx TEMAC Documents and the GSRD documents reference an IRENABLE register and an IRSTATUS register, I cobbled something together 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 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 Bit set for an Rx interrupt. All fine - except that no interrupt actually occurs. 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 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. I don't think I have the DMA in my bit image. 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 ? Thereis a Linux driver for the LL_TEMAC that comes with GSRD, but my group's efforts go toward the PLB_TEMAC as that is the EDK IP we want to promote and whose drivers we'd like to see in kernel.org. You should be able to go to http://www.xilinx.com/gsrd to get the GSRD design, and inside of that design somewhere you'll find a Linux 2.4 driver for the LL TEMAC. _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded at ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded -- Dave Lynch DLA Systems Software Development: Embedded Linux 717.627.3770 dhlii at dlasys.net http://www.dlasys.net fax: 1.253.369.9244 Cell: 1.717.587.7774 Over 25 years' experience in platforms, languages, and technologies too numerous to list. "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." Albert Einstein -------------- next part -------------- An HTML attachment was scrubbed... URL: http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20060808/d9205ffc/attachment.htm