target/linux/ppc40x/patches/002-disable_emac_loopback_mode.patch

   1 --- a/arch/powerpc/platforms/40x/kilauea.c
   2 +++ b/arch/powerpc/platforms/40x/kilauea.c
   3 @@ -21,6 +21,8 @@
   4  #include <asm/uic.h>
   5  #include <asm/pci-bridge.h>
   6  #include <asm/ppc4xx.h>
   7 +#include <asm/dcr.h>
   8 +#include <asm/dcr-regs.h>
   9
  10  static __initdata struct of_device_id kilauea_of_bus[] = {
  11         { .compatible = "ibm,plb4", },
  12 @@ -46,6 +48,13 @@ static int __init kilauea_probe(void)
  13
  14         ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
  15
  16 +       /*
  17 +        * 405EX(r) has SDR0_MFR[E0CS/E1CS] set after reset. This selects
  18 +        * the internal loopback mode. Clear these bits so that both EMACs
  19 +        * don't use loopback mode as deafult.
  20 +        */
  21 +       mtdcri(SDR0, SDR0_MFR, mfdcri(SDR0, SDR0_MFR) & ~0x0c000000);
  22 +
  23         return 1;
  24  }
  25