Cyclone V SX SoC - DMA Controller Peripheral Request Interface

In case anyone is getting stuck on CYCLONE V DMA peripheral request DMAWFP. (f2h_dma_req)

Here is the clue.

First, search for per2modrst register in the Reset Manager on HPS altera homepage.

Second, you need to make sure the DMA channels are taken out of reset, all 8 channels are being reset and remain reset after POR. For example, I need channel 0,1,2, you have to do this in the u-boot cmd:

>mm.b 0xFFD05018

ffd05018: ff ? f8

ffd05019: 00 ? q

>

Finally your DMA330 should be able to respond to the requests from FPGA.

good luck.