Have you rebuilt the preloader and run the hps bridge enable handoff macro during the uBoot phase? This will take the bridges out of reset properly...
-Mike On Fri, Jan 12, 2018 at 1:10 PM, Janet Estabridis <jpe1...@mchsi.com> wrote: > Thanks in advance. > > Previously I have done the same thing on a Macnica Sodia board but used > the FPGA DDR memory to do the same thing -- so I HAVE VERIFIED that my > firmware works as advertised. > > Currently - I want to use HPS DDR to reduce the DDR chips needed for our > custom PCB so ... I am > > working on a Macnica Helio board took the Golden Design and added my IPs > then - I have used Q17.1 bsp-editor and associated commands to generate the > u-boot and preloader. > > If necessary I can provide those instructions. > > I am using kernel 4.1.22-ltsi-02999-g9689ce4 with some extra features > enabled. > > At first my *.dtb file was not correctly resetting the bridge, but > subsequently I changed the *.dtb (and from another post I matched it to > the *.dtb of the kernel). > > AND I can see during boot > [ 2.292525] fpga_manager fpga0: Altera SOCFPGA FPGA Manager registered > [ 2.299650] altera_hps2fpga_bridge ff400000.fpgabridge: fpga bridge > [lwhps2fpga] registered > [ 2.308230] altera_hps2fpga_bridge ff500000.fpgabridge: fpga bridge > [hps2fpga] registered > [ 2.316543] altera_hps2fpga_bridge ff600000.fpgabridge: fpga bridge > [fpga2hps] registered > > > I HAVE SIGNAL TAP SET UP TO SEE THE avs and avm signals --> > I have a device driver that has a kernel buffer of known data and I give > the firmware that start address to read from BUT I can see all the correct > bus signals but the data read from the address IS NOT THE EXPECTED DATA IT > IS ZERO !!! > > What am I missing? > > Any help/ideas will be greatly appreciated !!! > > > _______________________________________________ > Rfi mailing list > Rfi@lists.rocketboards.org > http://lists.rocketboards.org/cgi-bin/mailman/listinfo/rfi > -- Michael Williamson Senior Engineer OpenPGP Public Key <http://keys.gnupg.net/pks/lookup?search=michael.williamson%2Bsecure%40criticallink.com&fingerprint=on&op=index> Voice: 315.425.4045 <(315)%20425-4045> x230 [image: Inline image 1] http://www.CriticalLink.com <http://www.criticallink.com/> 6712 Brooklawn Parkway, Syracuse, NY 13211 <https://www.linkedin.com/company/critical-link-llc> <https://twitter.com/Critical_Link> <http://www.criticallink.com>
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