We now have a prototype LS1021 board running and I have one unsolved problem.
I am using IFC_CS1 to access our FPGA and everything works except the transfer acknowledge (IFC_RB1_B).
I have verified that the signal is going low for two IFC_CLK cycles but the access does not stop until it times out.
I have change the timeout time to verify that this is what is happening.
If I disable the transfer acknowledge the timing works as described in the manual.
The IFC_CS1 is in the normal GPCM operation mode.
The one thing in the manual that concerns me is that IFC_RB1_B is a dual function pin with SPI1_SIN as the other option.
There is nothing in the manual that tells what controls this pins function.