[coreboot-gerrit] New patch to review for coreboot: [WIP]nb/intel/sandybridge/raminit: Add default values

[Patrick Rudolph (siro@das-labor.org)]

Patrick Rudolph (siro at das-labor.org) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17609

-gerrit

commit 879cfdeccbae5ce12d6f0be5a788556c4ae9c404
Author: Patrick Rudolph <siro at das-labor.org>
Date:   Fri Nov 25 15:40:49 2016 +0100

    [WIP]nb/intel/sandybridge/raminit: Add default values
    
    Add 100 Mhz reflock default values for Ivybridge.
    Some values are extracted from MRC, those marked as
    guessed needs to be verified.
    
    UNTESTED!
    
    Change-Id: Ife7f899b5fea02827ad998e9e8ab10ecaef61191
    Signed-off-by: Patrick Rudolph <siro at das-labor.org>
---
 src/northbridge/intel/sandybridge/raminit_ivy.c | 53 +++++++++++++++++++++++--
 1 file changed, 50 insertions(+), 3 deletions(-)

diff --git a/src/northbridge/intel/sandybridge/raminit_ivy.c b/src/northbridge/intel/sandybridge/raminit_ivy.c
index 53ae7ba..ea4565b 100644
--- a/src/northbridge/intel/sandybridge/raminit_ivy.c
+++ b/src/northbridge/intel/sandybridge/raminit_ivy.c
@@ -19,6 +19,8 @@
 #include <console/usb.h>
 #include <cpu/x86/msr.h>
 #include <delay.h>
+#include <arch/io.h>
+#include <device/pci_ops.h>
 #include "raminit_native.h"
 #include "raminit_common.h"
 
@@ -290,10 +292,28 @@ static void dram_timing(ramctr_timing * ctrl)
 	u8 val;
 	u32 val32;
 
-	/* Maximum supported DDR3 frequency is 1066MHz (DDR3 2133) so make sure
-	 * we cap it if we have faster DIMMs.
+	/* Maximum supported DDR3 frequency is 1400MHz (DDR3 2800).
+	 * We cap it at 1200Mhz (DDR3 2400).
 	 * Then, align it to the closest JEDEC standard frequency */
-	if (ctrl->tCK <= TCK_1066MHZ) {
+	if (ctrl->tCK <= TCK_1200MHZ) {
+		ctrl->tCK = TCK_1200MHZ;
+		ctrl->edge_offset[0] = 18; //XXX: guessed
+		ctrl->edge_offset[1] = 8;
+		ctrl->edge_offset[2] = 8;
+		ctrl->timC_offset[0] = 20; //XXX: guessed
+		ctrl->timC_offset[1] = 8;
+		ctrl->timC_offset[2] = 8;
+		ctrl->reg_320c_range_threshold = 10;
+	} else if (ctrl->tCK <= TCK_1100MHZ) {
+		ctrl->tCK = TCK_1100MHZ;
+		ctrl->edge_offset[0] = 17; //XXX: guessed
+		ctrl->edge_offset[1] = 7;
+		ctrl->edge_offset[2] = 7;
+		ctrl->timC_offset[0] = 19; //XXX: guessed
+		ctrl->timC_offset[1] = 7;
+		ctrl->timC_offset[2] = 7;
+		ctrl->reg_320c_range_threshold = 13;
+	} else if (ctrl->tCK <= TCK_1066MHZ) {
 		ctrl->tCK = TCK_1066MHZ;
 		ctrl->edge_offset[0] = 16;
 		ctrl->edge_offset[1] = 7;
@@ -302,6 +322,15 @@ static void dram_timing(ramctr_timing * ctrl)
 		ctrl->timC_offset[1] = 7;
 		ctrl->timC_offset[2] = 7;
 		ctrl->reg_320c_range_threshold = 13;
+	} else if (ctrl->tCK <= TCK_1000MHZ) {
+		ctrl->tCK = TCK_1000MHZ;
+		ctrl->edge_offset[0] = 15; //XXX: guessed
+		ctrl->edge_offset[1] = 6;
+		ctrl->edge_offset[2] = 6;
+		ctrl->timC_offset[0] = 17; //XXX: guessed
+		ctrl->timC_offset[1] = 6;
+		ctrl->timC_offset[2] = 6;
+		ctrl->reg_320c_range_threshold = 13;
 	} else if (ctrl->tCK <= TCK_933MHZ) {
 		ctrl->tCK = TCK_933MHZ;
 		ctrl->edge_offset[0] = 14;
@@ -311,6 +340,15 @@ static void dram_timing(ramctr_timing * ctrl)
 		ctrl->timC_offset[1] = 6;
 		ctrl->timC_offset[2] = 6;
 		ctrl->reg_320c_range_threshold = 15;
+	} else if (ctrl->tCK <= TCK_900MHZ) {
+		ctrl->tCK = TCK_900MHZ;
+		ctrl->edge_offset[0] = 14; //XXX: guessed
+		ctrl->edge_offset[1] = 6;
+		ctrl->edge_offset[2] = 6;
+		ctrl->timC_offset[0] = 15; //XXX: guessed
+		ctrl->timC_offset[1] = 6;
+		ctrl->timC_offset[2] = 6;
+		ctrl->reg_320c_range_threshold = 12;
 	} else if (ctrl->tCK <= TCK_800MHZ) {
 		ctrl->tCK = TCK_800MHZ;
 		ctrl->edge_offset[0] = 13;
@@ -320,6 +358,15 @@ static void dram_timing(ramctr_timing * ctrl)
 		ctrl->timC_offset[1] = 5;
 		ctrl->timC_offset[2] = 5;
 		ctrl->reg_320c_range_threshold = 15;
+	} else if (ctrl->tCK <= TCK_700MHZ) {
+		ctrl->tCK = TCK_700MHZ;
+		ctrl->edge_offset[0] = 13; //XXX: guessed
+		ctrl->edge_offset[1] = 5;
+		ctrl->edge_offset[2] = 5;
+		ctrl->timC_offset[0] = 14; //XXX: guessed
+		ctrl->timC_offset[1] = 5;
+		ctrl->timC_offset[2] = 5;
+		ctrl->reg_320c_range_threshold = 16;
 	} else if (ctrl->tCK <= TCK_666MHZ) {
 		ctrl->tCK = TCK_666MHZ;
 		ctrl->edge_offset[0] = 10;