ppc4xx: Correctly setup ranges property in ebc node

Previously only the NOR flash mapping was written into the ranges
property of the ebc node. This patch now writes all enabled chip
select areas into the ranges property.

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

2 files changed, 59 insertions, 17 deletions

diff --git a/cpu/ppc4xx/fdt.c b/cpu/ppc4xx/fdt.c
index a97484f..c55e1cf 100644
--- a/cpu/ppc4xx/fdt.c
+++ b/cpu/ppc4xx/fdt.c
@@ -37,29 +37,40 @@ DECLARE_GLOBAL_DATA_PTR;
 
 void __ft_board_setup(void *blob, bd_t *bd)
 {
-	u32 val[4];
 	int rc;
+	int i;
+	u32 bxcr;
+	u32 ranges[EBC_NUM_BANKS * 4];
+	u32 *p = ranges;
+	char *ebc_path = "/plb/opb/ebc";
 
 	ft_cpu_setup(blob, bd);
 
-	/* Fixup NOR mapping */
-	val[0] = 0;				/* chip select number */
-	val[1] = 0;				/* always 0 */
-	val[2] = gd->bd->bi_flashstart;
-	val[3] = gd->bd->bi_flashsize;
-	if (fdt_path_offset(blob, "/plb/opb/ebc") >= 0) {
-		rc = fdt_find_and_setprop(blob, "/plb/opb/ebc", "ranges",
-					  val, sizeof(val), 1);
-	} else {
-		/*
-		 * Some 405 PPC's have EBC as direct PLB child in the dts
-		 */
-		rc = fdt_find_and_setprop(blob, "/plb/ebc", "ranges",
-					  val, sizeof(val), 1);
+	/*
+	 * Read 4xx EBC bus bridge registers to get mappings of the
+	 * peripheral banks into the OPB/PLB address space
+	 */
+	for (i = 0; i < EBC_NUM_BANKS; i++) {
+		mtdcr(ebccfga, EBC_BXCR(i));
+		bxcr = mfdcr(ebccfgd);
+
+		if ((bxcr & EBC_BXCR_BU_MASK) != EBC_BXCR_BU_NONE) {
+			*p++ = i;
+			*p++ = 0;
+			*p++ = bxcr & EBC_BXCR_BAS_MASK;
+			*p++ = EBC_BXCR_BANK_SIZE(bxcr);
+		}
 	}
-	if (rc)
-		printf("Unable to update property NOR mapping, err=%s\n",
+
+	/* Some 405 PPC's have EBC as direct PLB child in the dts */
+	if (fdt_path_offset(blob, "/plb/opb/ebc") < 0)
+		strcpy(ebc_path, "/plb/ebc");
+	rc = fdt_find_and_setprop(blob, ebc_path, "ranges", ranges,
+				  (p - ranges) * sizeof(u32), 1);
+	if (rc) {
+		printf("Unable to update property EBC mappings, err=%s\n",
 		       fdt_strerror(rc));
+	}
 }
 void ft_board_setup(void *blob, bd_t *bd) __attribute__((weak, alias("__ft_board_setup")));
 
diff --git a/include/asm-ppc/ppc4xx-ebc.h b/include/asm-ppc/ppc4xx-ebc.h
index d180e04..9680f70 100644
--- a/include/asm-ppc/ppc4xx-ebc.h
+++ b/include/asm-ppc/ppc4xx-ebc.h
@@ -35,7 +35,38 @@
 #define CONFIG_EBC_PPC4xx_IBM_VER1
 #endif
 
+/*
+ * Define the max number of EBC banks (chip selects)
+ */
+#if defined(CONFIG_405CR) || defined(CONFIG_405GP) || \
+    defined(CONFIG_405EZ) || \
+    defined(CONFIG_440GP) || defined(CONFIG_440GX)
+#define EBC_NUM_BANKS	8
+#endif
+
+#if defined(CONFIG_405EP)
+#define EBC_NUM_BANKS	5
+#endif
+
+#if defined(CONFIG_405EX) || \
+    defined(CONFIG_460SX)
+#define EBC_NUM_BANKS	4
+#endif
+
+#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
+    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
+    defined(CONFIG_460EX) || defined(CONFIG_460GT)
+#define EBC_NUM_BANKS	6
+#endif
+
+#if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
+#define EBC_NUM_BANKS	3
+#endif
+
 /* Bank Configuration Register */
+#define EBC_BXCR(n)		(n)
+#define EBC_BXCR_BANK_SIZE(n)	(0x100000 << (((n) & EBC_BXCR_BS_MASK) >> 17))
+
 #define	EBC_BXCR_BAS_MASK	PPC_REG_VAL(11, 0xFFF)
 #define EBC_BXCR_BAS_ENCODE(n)	(((static_cast(u32, n)) & EBC_BXCR_BAS_MASK))
 #define EBC_BXCR_BS_MASK	PPC_REG_VAL(14, 0x7)