Hi Andrey, Am Montag, den 30.11.2015, 10:56 -0800 schrieb Andrey Smirnov: > Hi All, > > I am working on adding EEPROM programming capabilities to e1000 driver > on a custom i.MX6Q (automotive) board with i210 (8086:1531) connected > over PCIe link. Unfortunately I am observing some bad/unexpected > behavior that might indicate PCIe issues. > > What I am seeing is device(i210) enumerating on PCIe bus, however any > accesses to its registers via its memory "window" result in either > 0xFFFFFFFF or 0xDEADBEEF. I tried accessing various PCIe configuration > registers of that device and it seem to work fine (as a part of that > test I read out some AER registers and they didn't indicate presence > of any PCIe link related errors). > > However when I boot Linux kernel (with 'igb' driver patched to > recognize 8086:1531 VID:PID) on that board and run 'eepromARMtool' > (Intel provided EEPROM programming tool) I can see it reading various > registers correctly > > My questions are: > - Is anyone currently using i.MX6 PCIe driver in 'next' branch? I didn't try the latest revision, but with v2015.10.0 PCIe on i.MX6 was working fine. > - Has anyone seen similar behavior on this particular controller > and discovered the root cause? > The symptoms you describe do look to me like the firmware on the i210 device doesn't get initialized. Unfortunately I don't have any specific pointers where to start searching for the root cause. Regards, Lucas -- Pengutronix e.K. | Lucas Stach | Industrial Linux Solutions | http://www.pengutronix.de/ | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
