Hi,
I was recently porting fec_mxc driver in u-boot to another platform. The initialization succeeds. However, invoking fec_send always throws the following error:
fec_send: status 0x8c00 index 0 ret -22
It looks like that the READY bit of the TX buffer descriptor is not cleared, but I still do not know why this happens. Does anyone have any clues about this issue? Thanks!
Here are some register values of the ethernet device when the error happens:
Ethernet state (ecntrl): 0xf0000102 (Active) TX state (x_des_active): Inactive (no FEC_X_DES_ACTIVE_TDAR bit) RX state (r_des_active): Inactive (no FEC_R_DES_ACTIVE_RDAR bit) TX control (x_cntrl): 0x00000004 RX control (r_cntrl): 0x05f20064 RX desc base (erdsr): 0x4e07fd40 (size: 0x600) TX desc base (etdsr): 0x4e07fdc0 Enabled events (imask): 0x00000000 Pending events (ievent): 0x00000000
Best, Shengtuo Hu