Hi Max,
On 1 September 2016 at 08:46, Max Ruttenberg mruttenberg@emutechnology.com wrote:
Hi,
(we should probably close down the u-boot-dm list - please use the main one)
I'm find myself clueless in regards to writing a driver for an FPGA over a PCI bus. This U-Boot is running on an NXP t102xrdb board family, if that matters.
The documentation in doc/driver-model/pci-info.txt mentions that I can use a macro named U_BOOT_PCI_DEVICE as alternative to listing my device in a device tree.
I found an example of this in drivers/net/e1000.c, and I tried to follow it as much as was applicable (this is an ethernet driver, which my driver is not).
But when U-Boot starts up, my "bind" function is never called, even though I can tell that my device with the corresponding vendor and device id is detected using the "pci [bus]" command.
I appreciate any help I can get.
Are you starting up PCI? For example, with:
ret = uclass_get_device(UCLASS_PCI, 0, &bus);
If you are, then it should scan the bus and find and bind all the devices, in pci_bind_bus_devices(). You can add DEBUG to the very top of that file to see.
But if you know the device is there, you may as well create a device tree-node for it. See chromebook_link.dts 'pci' node for an example. Then you can request the device directly, and PCI will be started up automatically.
Regards, Simon