POST: Add option for external ethernet loopback test

When CFG_POST_ETHER_EXT_LOOPBACK is defined, the ethernet POST
is not done using an internal loopback connection, but by assuming
that an external loopback connector is plugged into the board.

Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/post/cpu/ppc4xx/ether.c b/post/cpu/ppc4xx/ether.c
index 391c815d7aeee98adc52e18f9827be162e7cde36..ab23ca5a3dbc6f420d41ad9204bfce6dd428959c 100644 (file)
--- a/post/cpu/ppc4xx/ether.c
+++ b/post/cpu/ppc4xx/ether.c
@@ -68,10 +68,10 @@ static char *rx_buf;
 static void ether_post_init (int devnum, int hw_addr)
 {
        int i;
-       unsigned mode_reg;
 #if defined(CONFIG_440GX) || \
     defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
     defined(CONFIG_440SP) || defined(CONFIG_440SPE)
+       unsigned mode_reg;
        sys_info_t sysinfo;
 #endif
 #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || defined(CONFIG_440SPE)
@@ -185,10 +185,17 @@ static void ether_post_init (int devnum, int hw_addr)
        mtdcr (malrxcasr, (MAL_TXRX_CASR >> devnum));
 
        /* set internal loopback mode */
+#ifdef CFG_POST_ETHER_EXT_LOOPBACK
+       out32 (EMAC_M1 + hw_addr, EMAC_M1_FDE | 0 |
+              EMAC_M1_RFS_4K | EMAC_M1_TX_FIFO_2K |
+              EMAC_M1_MF_100MBPS | EMAC_M1_IST |
+              in32 (EMAC_M1));
+#else
        out32 (EMAC_M1 + hw_addr, EMAC_M1_FDE | EMAC_M1_ILE |
               EMAC_M1_RFS_4K | EMAC_M1_TX_FIFO_2K |
               EMAC_M1_MF_100MBPS | EMAC_M1_IST |
               in32 (EMAC_M1));
+#endif
 
        /* set transmit enable & receive enable */
        out32 (EMAC_M0 + hw_addr, EMAC_M0_TXE | EMAC_M0_RXE);