ppc4xx: Fix POST ethernet test for Haleakala

The POST ethernet test needed to be changed to dynamically determine
the count of ethernet devices. This code is cloned from the 4xx
ethernet driver.

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

post/cpu/ppc4xx/ether.c

@@ -52,6 +52,28 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+/*
+ * Get count of EMAC devices (doesn't have to be the max. possible number
+ * supported by the cpu)
+ *
+ * CONFIG_BOARD_EMAC_COUNT added so now a "dynamic" way to configure the
+ * EMAC count is possible. As it is needed for the Kilauea/Haleakala
+ * 405EX/405EXr eval board, using the same binary.
+ */
+#if defined(CONFIG_BOARD_EMAC_COUNT)
+#define LAST_EMAC_NUM	board_emac_count()
+#else /* CONFIG_BOARD_EMAC_COUNT */
+#if defined(CONFIG_HAS_ETH3)
+#define LAST_EMAC_NUM	4
+#elif defined(CONFIG_HAS_ETH2)
+#define LAST_EMAC_NUM	3
+#elif defined(CONFIG_HAS_ETH1)
+#define LAST_EMAC_NUM	2
+#else
+#define LAST_EMAC_NUM	1
+#endif
+#endif /* CONFIG_BOARD_EMAC_COUNT */
+
 #if defined(CONFIG_440SPE) || defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
 #define SDR0_MFR_ETH_CLK_SEL_V(n)	((0x01<<27) / (n+1))
 #endif
@@ -65,6 +87,8 @@ static volatile mal_desc_t rx __cacheline_aligned;
 static char *tx_buf;
 static char *rx_buf;
 
+int board_emac_count(void);
+
 static void ether_post_init (int devnum, int hw_addr)
 {
 	int i;
@@ -372,6 +396,7 @@ Done:
 int ether_post_test (int flags)
 {
 	int res = 0;
+	int i;
 
 	/* Allocate tx & rx packet buffers */
 	tx_buf = malloc (PKTSIZE_ALIGN + CFG_CACHELINE_SIZE);
@@ -383,13 +408,10 @@ int ether_post_test (int flags)
 		goto out_free;
 	}
 
-	/* EMAC0 */
-	if (test_ctlr (0, 0))
-		res = -1;
-
-	/* EMAC1 */
-	if (test_ctlr (1, 0x100))
-		res = -1;
+	for (i = 0; i < LAST_EMAC_NUM; i++) {
+		if (test_ctlr (i, i*0x100))
+			res = -1;
+	}
 
 out_free:
 	free (tx_buf);