Hi,
this is somewhat offtopic, but I know no better place to ask. I'm trying to make the cs8900 ethernet chip on the Cogent CSB226 work with u-boot and Linux. The chip is mapped to 0x08000000 / CS2 and it is connected in I/O mapped mode.
However, I do not see anything usefull in u-boot. This is how the port area looks after power on:
uboot> md.w 0x08000000 10 (1) (2) (3) 08000000: 0000 a1ff 0000 a1ff 0009 a1ff 0000 a1ff ................ 08000010: 0000 a1ff 3136 a1ff 00d6 a1ff 00d6 a1ff ....61..........
I would have expected the cs8900's magic number (0x0e62 00[03|05]) in the data registers (2),(3). However, when I write 0 to the Packet Page Pointer Port (1) to select register 0:
uboot> md.w 0x08000000 10 08000000: 0000 a1ff 0000 a1ff 3109 a1ff 0000 a1ff .........1...... 08000010: 0000 a1ff 3136 a1ff 00d6 a1ff 00d6 a1ff ....61..........
this is still not what I would have expected. It's especially strange that every second register contains 0xa1ff.
Did anybody else see something different? Is the u-boot driver working for anyone?
Cheers, Robert