intel/kunimitsu Fab3: Strengthening Rcomp target CTRL value

This patch strengthens the Rcomp Target CTRL by 10% for
8GB memory part K4E6E304EE-EGCF as with the current values
the MRC training is failing due to more load on CS#

BRANCH=None
BUG=chrome-os-partner:44647
TEST=BUilds and boots on Kunimitsu.

Change-Id: I478002bbebabaac418356d4b5b4755bb56009268
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: b208659e690d8cb5b8dcaf30eed53c01b9f77f6d
Original-Change-Id: Ia0a0c1358649af77a3a0d301cb791f26f1e039bf
Original-Signed-off-by: pchandri <preetham.chandrian@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/304103
Original-Commit-Ready: Preetham Chandrian <preetham.chandrian@intel.com>
Original-Tested-by: Preetham Chandrian <preetham.chandrian@intel.com>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Preetham Chandrian <preetham.chandrian@intel.com>
Reviewed-on: http://review.coreboot.org/12143
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/mainboard/intel/kunimitsu/pei_data.c

@@ -22,6 +22,11 @@
 #include <string.h>
 #include <soc/pei_data.h>
 #include <soc/pei_wrapper.h>
+#include "boardid.h"
+
+/* PCH_MEM_CFG[3:0] */
+#define MAX_MEMORY_CONFIG	0x10
+#define RCOMP_TARGET_PARAMS	0x5
 
 void mainboard_fill_pei_data(struct pei_data *pei_data)
 {
@@ -40,12 +45,19 @@ void mainboard_fill_pei_data(struct pei_data *pei_data)
 	const u16 RcompResistor[3] = { 200, 81, 162 };
 
 	/* Rcomp target */
-	const u16 RcompTarget[5] = { 100, 40, 40, 23, 40 };
+	static const u16 RcompTarget[MAX_MEMORY_CONFIG][RCOMP_TARGET_PARAMS] = {
+		{ 100, 40, 40, 23, 40 },
+		{ 100, 40, 40, 23, 40 },
+		{ 100, 40, 40, 23, 40 },
+		/*Strengthen the Rcomp Target Ctrl for 8GB K4E6E304EE -EGCF*/
+		{ 100, 40, 40, 21, 40 }, };
+
 
 	memcpy(pei_data->dq_map, dq_map, sizeof(dq_map));
 	memcpy(pei_data->dqs_map, dqs_map, sizeof(dqs_map));
 	memcpy(pei_data->RcompResistor, RcompResistor,
 		 sizeof(RcompResistor));
-	memcpy(pei_data->RcompTarget, RcompTarget,
-		 sizeof(RcompTarget));
+	memcpy(pei_data->RcompTarget, &RcompTarget[pei_data->mem_cfg_id][0],
+		 sizeof(RcompTarget[pei_data->mem_cfg_id]));
+
 }

src/mainboard/intel/kunimitsu/romstage.c

@@ -23,7 +23,7 @@
 #include <console/console.h>
 #include <string.h>
 #include <ec/google/chromeec/ec.h>
-#include <soc/gpio.h>
+#include <gpio.h>
 #include <soc/pei_data.h>
 #include <soc/pei_wrapper.h>
 #include <soc/romstage.h>
@@ -40,11 +40,21 @@ static void early_config_gpio(void)
 
 void mainboard_romstage_entry(struct romstage_params *params)
 {
+	/* PCH_MEM_CFG[3:0] */
+	gpio_t spd_gpios[] = {
+		GPIO_MEM_CONFIG_0,
+		GPIO_MEM_CONFIG_1,
+		GPIO_MEM_CONFIG_2,
+		GPIO_MEM_CONFIG_3,
+	};
+
 	/* Ensure the EC and PD are in the right mode for recovery */
 	google_chromeec_early_init();
 
 	early_config_gpio();
 
+	params->pei_data->mem_cfg_id = gpio_base2_value(spd_gpios,
+							ARRAY_SIZE(spd_gpios));
 	/* Fill out PEI DATA */
 	mainboard_fill_pei_data(params->pei_data);
 	mainboard_fill_spd_data(params->pei_data);

src/mainboard/intel/kunimitsu/spd/spd.c

@@ -22,14 +22,11 @@
 #include <boardid.h>
 #include <cbfs.h>
 #include <console/console.h>
-#include <gpio.h>
-#include <soc/gpio.h>
 #include <soc/pei_data.h>
 #include <soc/romstage.h>
 #include <string.h>
 
 #include "../boardid.h"
-#include "../gpio.h"
 #include "spd.h"
 
 static void mainboard_print_spd_info(uint8_t spd[])
@@ -90,14 +87,8 @@ void mainboard_fill_spd_data(struct pei_data *pei_data)
 	size_t spd_file_len;
 	int spd_index, sku_id;
 
-	gpio_t spd_gpios[] = {
-		GPIO_MEM_CONFIG_0,
-		GPIO_MEM_CONFIG_1,
-		GPIO_MEM_CONFIG_2,
-		GPIO_MEM_CONFIG_3,
-	};
 
-	spd_index = gpio_base2_value(spd_gpios, ARRAY_SIZE(spd_gpios));
+	spd_index = pei_data->mem_cfg_id;
 	/*
 	 * XXX: This is incorrect usage.The Board ID should be the revision ID
 	 *      and not SKU ID but on SCRD it indicates SKU.

src/soc/intel/skylake/include/soc/pei_data.h

@@ -91,6 +91,7 @@ struct pei_data {
 	/* Data from MRC that should be saved to flash */
 	void *data_to_save;
 	int data_to_save_size;
+	int mem_cfg_id;
 } __attribute__((packed));
 
 typedef struct pei_data PEI_DATA;