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-rw-r--r--cpu/ppc4xx/sdram.c32
1 files changed, 26 insertions, 6 deletions
diff --git a/cpu/ppc4xx/sdram.c b/cpu/ppc4xx/sdram.c
index d520cd3ff4..2724d91f0f 100644
--- a/cpu/ppc4xx/sdram.c
+++ b/cpu/ppc4xx/sdram.c
@@ -187,14 +187,14 @@ void sdram_init(void)
/*
* Disable memory controller.
*/
- mtsdram0(mem_mcopt1, 0x00000000);
+ mtsdram(mem_mcopt1, 0x00000000);
/*
* Set MB0CF for bank 0.
*/
- mtsdram0(mem_mb0cf, mb0cf[i].reg);
- mtsdram0(mem_sdtr1, sdtr1);
- mtsdram0(mem_rtr, compute_rtr(speed, mb0cf[i].rows, 64));
+ mtsdram(mem_mb0cf, mb0cf[i].reg);
+ mtsdram(mem_sdtr1, sdtr1);
+ mtsdram(mem_rtr, compute_rtr(speed, mb0cf[i].rows, 64));
udelay(200);
@@ -203,14 +203,34 @@ void sdram_init(void)
* Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst
* read/prefetch.
*/
- mtsdram0(mem_mcopt1, 0x80800000);
+ mtsdram(mem_mcopt1, 0x80800000);
udelay(10000);
if (get_ram_size(0, mb0cf[i].size) == mb0cf[i].size) {
/*
- * OK, size detected -> all done
+ * OK, size detected. Enable second bank if
+ * defined (assumes same type as bank 0)
*/
+#ifdef CONFIG_SDRAM_BANK1
+ u32 b1cr = mb0cf[i].size | mb0cf[i].reg;
+
+ mtsdram(mem_mcopt1, 0x00000000);
+ mtsdram(mem_mb1cf, b1cr); /* SDRAM0_B1CR */
+ mtsdram(mem_mcopt1, 0x80800000);
+ udelay(10000);
+
+ /*
+ * Check if 2nd bank is really available.
+ * If the size not equal to the size of the first
+ * bank, then disable the 2nd bank completely.
+ */
+ if (get_ram_size((long *)mb0cf[i].size, mb0cf[i].size) !=
+ mb0cf[i].size) {
+ mtsdram(mem_mb1cf, 0);
+ mtsdram(mem_mcopt1, 0);
+ }
+#endif
return;
}
}