MPC85xx: TQM8548: fix SDRAM timing for 533 MHz
According to new TQM8548 timing specification:
Refresh Recovery: 34 -> 53 clocks
CKE pulse width: 1 -> 3 cycles
Window for four activities: 13 -> 14 cycles
Signed-off-by: Jens Gehrlein <sew_s@tqs.de>
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
diff --git a/board/tqc/tqm85xx/sdram.c b/board/tqc/tqm85xx/sdram.c
index 783b280..09f7c9b 100644
--- a/board/tqc/tqm85xx/sdram.c
+++ b/board/tqc/tqm85xx/sdram.c
@@ -81,21 +81,23 @@
ddr->sdram_cfg = 0;
#ifdef CONFIG_TQM8548
+ /* Timing and refresh settings for DDR2-533 and below */
+
ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24;
ddr->cs0_config = ddr_cs_conf[0].reg;
- ddr->timing_cfg_3 = 0x00010000;
+ ddr->timing_cfg_3 = 0x00020000;
/* TIMING CFG 1, 533MHz
* PRETOACT: 4 Clocks
* ACTTOPRE: 12 Clocks
* ACTTORW: 4 Clocks
* CASLAT: 4 Clocks
- * REFREC: 34 Clocks
+ * REFREC: EXT_REFREC:REFREC 53 Clocks
* WRREC: 4 Clocks
* ACTTOACT: 3 Clocks
* WRTORD: 2 Clocks
*/
- ddr->timing_cfg_1 = 0x4C47A432;
+ ddr->timing_cfg_1 = 0x4C47D432;
/* TIMING CFG 2, 533MHz
* ADD_LAT: 3 Clocks
@@ -103,10 +105,10 @@
* WR_LAT: 3 Clocks
* RD_TO_PRE: 2 Clocks
* WR_DATA_DELAY: 1/2 Clock
- * CKE_PLS: 1 Clock
- * FOUR_ACT: 13 Clocks
+ * CKE_PLS: 3 Clock
+ * FOUR_ACT: 14 Clocks
*/
- ddr->timing_cfg_2 = 0x3318484D;
+ ddr->timing_cfg_2 = 0x331848CE;
/* DDR SDRAM Mode, 533MHz
* MRS: Extended Mode Register