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authorStefan Roese <sr@denx.de>2008-01-05 09:12:41 +0100
committerStefan Roese <sr@denx.de>2008-01-05 09:12:41 +0100
commit845c6c95dbfe6c915ce68a0a115852fa17932fb4 (patch)
treeb935ef67e63cae739a497daf7e70869653c1b2cb /include/configs
parent5c740711f0ea5b51414b341b71597c4a0751be74 (diff)
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ppc4xx: Update Katmai/44x_spd_ddr2.c code for optimal DDR2 setup
On Katmai the complete auto-calibration somehow doesn't seem to produce the best results, meaning optimal values for RQFD/RFFD. This was discovered by GDA using a high bandwidth scope, analyzing the DDR2 signals. GDA provided a fixed value for RQFD, so now on Katmai "only" RFFD is auto-calibrated. This patch also adds RDCC calibration as mentioned on page 7 of the AMCC PowerPC440SP/SPe DDR2 application note: "DDR1/DDR2 Initialization Sequence and Dynamic Tuning" Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'include/configs')
-rw-r--r--include/configs/katmai.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/configs/katmai.h b/include/configs/katmai.h
index 0aa4f2d..78c794a 100644
--- a/include/configs/katmai.h
+++ b/include/configs/katmai.h
@@ -111,6 +111,7 @@
#define CONFIG_SPD_EEPROM 1 /* Use SPD EEPROM for setup */
#define SPD_EEPROM_ADDRESS {0x51, 0x52} /* SPD i2c spd addresses*/
#define CONFIG_DDR_ECC 1 /* with ECC support */
+#define CONFIG_DDR_RQDC_FIXED 0x80000038 /* optimal value found by GDA*/
#undef CONFIG_STRESS
/*-----------------------------------------------------------------------