Hi, I'm using u-boot-1.1.4 (quite old but I must use it) with my AT91RM9200 based board. I replaced DM9161 with a new DP83848 PHY ethernet physical layer transceiver.
So I'm backporting Sergey Kubushyn's driver National Semiconductor DP83848 PHY Driver for TI DaVinci (TMS320DM644x) adapting it for my AT91RM9200 based board.
I left eth_init() like it was for DM9161 because connections are the same. The problem I'm facing to is that PHY is not detected when I call dp83848_is_phy_connected (see below).
I wonder if anybody used DP83848 PHY before and maybe could give me a hint.
int dp83848_is_phy_connected(AT91PS_EMAC phy_addr) { u_int16_t id1, id2;
printf ("*** dp83848_is_phy_connected\n");
at91rm9200_EmacEnableMDIO (phy_addr); at91rm9200_EmacReadPhy(phy_addr, DP83848_PHYID1_REG, &id1) ; at91rm9200_EmacReadPhy(phy_addr, DP83848_PHYID2_REG, &id2) ; at91rm9200_EmacDisableMDIO (phy_addr);
printf ("phy_addr=%X - id1=%X - id2=%X\n", phy_addr, id1, id2); // here I always get 0xFFFBC000 0xFFFF 0xFFFF
if ((id1 == DP83848_PHYID1_OUI) && (id2 == DP83848_PHYID2_OUI)) return(1);
return(0); }
TIA