Honored Contributor
Honored ContributorI think this is mostly interface design problem, not about Linux.
Please show all your PIO address map. For uncache mask, I mean you can use# define IO_PIO 0x820030C0 For protocol, I mean you should initialize the control port data and data port direction at the beginning. And study the handshake signal carefully to avoid contention. Do you understand what I mean about bus contention? You may try signle step and use oscilliscope to check the signal level. If your control signals are active low, you can add invertor to output pins at the top level design. You may assign power on value, too. - Hippo
