soc/intel/cannonlake: Change LPDDR4 to MEMCFG

Modify the previously SOC_CNL_LPDDR4_INIT to SOC_CNL_MEMCFG_INIT, to
make the infrasturture to handle both LPDDR4 and DDR4 cases in the
future. Consider the case of reading SPD from SMBus other than providing
SPD pointer directly.

BUG=N/A
TEST=Verify "./util/abuild/abuild -p none -t google/zoombini -x -a"
compiles successfully.

Change-Id: I2f898147f67dd52b89cc3d9fc4e6b3854fa81f57
Signed-off-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/28248
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

4 files changed, 73 insertions, 46 deletions

diff --git a/src/soc/intel/cannonlake/Kconfig b/src/soc/intel/cannonlake/Kconfig
index e6a2062c4a..ef39706b8d 100644
--- a/src/soc/intel/cannonlake/Kconfig
+++ b/src/soc/intel/cannonlake/Kconfig
@@ -184,7 +184,7 @@ config CPU_BCLK_MHZ
 	int
 	default 100
 
-config SOC_INTEL_CANNONLAKE_LPDDR4_INIT
+config SOC_INTEL_CANNONLAKE_MEMCFG_INIT
 	bool
 	default n
 
diff --git a/src/soc/intel/cannonlake/Makefile.inc b/src/soc/intel/cannonlake/Makefile.inc
index 013e86a922..065d92b6e5 100644
--- a/src/soc/intel/cannonlake/Makefile.inc
+++ b/src/soc/intel/cannonlake/Makefile.inc
@@ -22,7 +22,7 @@ bootblock-y += lpc.c
 bootblock-y += p2sb.c
 bootblock-$(CONFIG_UART_DEBUG) += uart.c
 
-romstage-$(CONFIG_SOC_INTEL_CANNONLAKE_LPDDR4_INIT) += cnl_lpddr4_init.c
+romstage-$(CONFIG_SOC_INTEL_CANNONLAKE_MEMCFG_INIT) += cnl_memcfg_init.c
 romstage-y += gpio.c
 romstage-y += gspi.c
 romstage-y += i2c.c
diff --git a/src/soc/intel/cannonlake/cnl_lpddr4_init.c b/src/soc/intel/cannonlake/cnl_memcfg_init.c
index ea8c410267..9f9592b5db 100644
--- a/src/soc/intel/cannonlake/cnl_lpddr4_init.c
+++ b/src/soc/intel/cannonlake/cnl_memcfg_init.c
@@ -15,13 +15,12 @@
 #include <assert.h>
 #include <console/console.h>
 #include <fsp/util.h>
-#include <soc/cnl_lpddr4_init.h>
+#include <soc/cnl_memcfg_init.h>
 #include <spd_bin.h>
 #include <string.h>
 
-static void meminit_lpddr4(FSP_M_CONFIG *mem_cfg,
-			const struct lpddr4_cfg *board_cfg,
-			size_t spd_data_len, uintptr_t spd_data_ptr)
+static void meminit_memcfg(FSP_M_CONFIG *mem_cfg,
+			const struct cnl_mb_cfg *board_cfg)
 {
 	/*
 	 * DqByteMapChx expects 12 bytes of data, but the last 6 bytes
@@ -29,17 +28,17 @@ static void meminit_lpddr4(FSP_M_CONFIG *mem_cfg,
 	 * we null out the rest of the data.
 	 */
 	memset(&mem_cfg->DqByteMapCh0, 0, sizeof(mem_cfg->DqByteMapCh0));
-	memcpy(&mem_cfg->DqByteMapCh0, &board_cfg->dq_map[LP4_CH0],
-		sizeof(board_cfg->dq_map[LP4_CH0]));
+	memcpy(&mem_cfg->DqByteMapCh0, &board_cfg->dq_map[DDR_CH0],
+		sizeof(board_cfg->dq_map[DDR_CH0]));
 
 	memset(&mem_cfg->DqByteMapCh1, 0, sizeof(mem_cfg->DqByteMapCh1));
-	memcpy(&mem_cfg->DqByteMapCh1, &board_cfg->dq_map[LP4_CH1],
-		sizeof(board_cfg->dq_map[LP4_CH1]));
+	memcpy(&mem_cfg->DqByteMapCh1, &board_cfg->dq_map[DDR_CH1],
+		sizeof(board_cfg->dq_map[DDR_CH1]));
 
-	memcpy(&mem_cfg->DqsMapCpu2DramCh0, &board_cfg->dqs_map[LP4_CH0],
-		sizeof(board_cfg->dqs_map[LP4_CH0]));
-	memcpy(&mem_cfg->DqsMapCpu2DramCh1, &board_cfg->dqs_map[LP4_CH1],
-		sizeof(board_cfg->dqs_map[LP4_CH1]));
+	memcpy(&mem_cfg->DqsMapCpu2DramCh0, &board_cfg->dqs_map[DDR_CH0],
+		sizeof(board_cfg->dqs_map[DDR_CH0]));
+	memcpy(&mem_cfg->DqsMapCpu2DramCh1, &board_cfg->dqs_map[DDR_CH1],
+		sizeof(board_cfg->dqs_map[DDR_CH1]));
 
 	memcpy(&mem_cfg->RcompResistor, &board_cfg->rcomp_resistor,
 		sizeof(mem_cfg->RcompResistor));
@@ -47,7 +46,12 @@ static void meminit_lpddr4(FSP_M_CONFIG *mem_cfg,
 	/* Early cannonlake requires rcomp targets to be 0 */
 	memcpy(&mem_cfg->RcompTarget, &board_cfg->rcomp_targets,
 		sizeof(mem_cfg->RcompTarget));
+}
 
+static void meminit_memcfg_spd(FSP_M_CONFIG *mem_cfg,
+			const struct cnl_mb_cfg *board_cfg,
+			size_t spd_data_len, uintptr_t spd_data_ptr)
+{
 	mem_cfg->MemorySpdDataLen = spd_data_len;
 	mem_cfg->MemorySpdPtr00 = spd_data_ptr;
 
@@ -56,23 +60,23 @@ static void meminit_lpddr4(FSP_M_CONFIG *mem_cfg,
 }
 
 /*
- * Initialize default LPDDR4 settings using spd data contained in a buffer.
+ * Initialize default memory settings using spd data contained in a buffer.
  */
-static void meminit_lpddr4_spd_data(FSP_M_CONFIG *mem_cfg,
-				const struct lpddr4_cfg *cnl_cfg,
+static void meminit_spd_data(FSP_M_CONFIG *mem_cfg,
+				const struct cnl_mb_cfg *cnl_cfg,
 				size_t spd_data_len, uintptr_t spd_data_ptr)
 {
 	assert(spd_data_ptr && spd_data_len);
-	meminit_lpddr4(mem_cfg, cnl_cfg, spd_data_len, spd_data_ptr);
+	meminit_memcfg_spd(mem_cfg, cnl_cfg, spd_data_len, spd_data_ptr);
 }
 
 /*
- * Initialize default LPDDR4 settings using the spd file specified by
+ * Initialize default memory settings using the spd file specified by
  * spd_index. The spd_index is an index into the SPD_SOURCES array defined
  * in spd/Makefile.inc.
  */
-static void meminit_lpddr4_cbfs_spd_index(FSP_M_CONFIG *mem_cfg,
-					const struct lpddr4_cfg *cnl_cfg,
+static void meminit_cbfs_spd_index(FSP_M_CONFIG *mem_cfg,
+					const struct cnl_mb_cfg *cnl_cfg,
 					int spd_index)
 {
 	size_t spd_data_len;
@@ -86,26 +90,40 @@ static void meminit_lpddr4_cbfs_spd_index(FSP_M_CONFIG *mem_cfg,
 	/* Memory leak is ok since we have memory mapped boot media */
 	assert(IS_ENABLED(CONFIG_BOOT_DEVICE_MEMORY_MAPPED));
 	spd_data_ptr = (uintptr_t)rdev_mmap_full(&spd_rdev);
-	meminit_lpddr4_spd_data(mem_cfg, cnl_cfg, spd_data_len, spd_data_ptr);
+	meminit_spd_data(mem_cfg, cnl_cfg, spd_data_len, spd_data_ptr);
 }
 
-/* Initialize LPDDR4 settings for CannonLake */
-void cannonlake_lpddr4_init(FSP_M_CONFIG *mem_cfg,
-			const struct lpddr4_cfg *cnl_cfg,
+/* Initialize onboard memory configurations for CannonLake */
+void cannonlake_memcfg_init(FSP_M_CONFIG *mem_cfg,
+			const struct cnl_mb_cfg *cnl_cfg,
 			const struct spd_info *spd)
 {
+	bool OnModuleSpd;
 	/* Early Command Training Enabled */
 	mem_cfg->ECT = cnl_cfg->ect;
 	mem_cfg->DqPinsInterleaved = cnl_cfg->dq_pins_interleaved;
-	mem_cfg->RefClk = 0; /* Auto Select CLK freq */
-	mem_cfg->CaVrefConfig = 0; /* VREF_CA->CHA/CHB */
+	mem_cfg->CaVrefConfig = cnl_cfg->vref_ca_config;
 
-	if (spd->spd_by_index) {
-		meminit_lpddr4_cbfs_spd_index(mem_cfg, cnl_cfg,
+	/* Spd pointer will only be used if all smbus slave address of memory
+	* sockets on the platform is empty */
+	for (int i = 0; i < ARRAY_SIZE(mem_cfg->SpdAddressTable); i++) {
+		if (spd->spd_smbus_address[i] != 0) {
+			mem_cfg->SpdAddressTable[i] = spd->spd_smbus_address[i];
+			OnModuleSpd = 1;
+		}
+	}
+
+	if (!OnModuleSpd) {
+		if (spd->spd_by_index) {
+			meminit_cbfs_spd_index(mem_cfg, cnl_cfg,
 				spd->spd_spec.spd_index);
-	} else {
-		meminit_lpddr4_spd_data(mem_cfg, cnl_cfg,
+		} else {
+			meminit_spd_data(mem_cfg, cnl_cfg,
 				spd->spd_spec.spd_data_ptr_info.spd_data_len,
 				spd->spd_spec.spd_data_ptr_info.spd_data_ptr);
+		}
 	}
+
+	meminit_memcfg(mem_cfg, cnl_cfg);
+
 }
diff --git a/src/soc/intel/cannonlake/include/soc/cnl_lpddr4_init.h b/src/soc/intel/cannonlake/include/soc/cnl_memcfg_init.h
index db1c3a57c9..7a76eb09f1 100644
--- a/src/soc/intel/cannonlake/include/soc/cnl_lpddr4_init.h
+++ b/src/soc/intel/cannonlake/include/soc/cnl_memcfg_init.h
@@ -13,8 +13,8 @@
  * GNU General Public License for more details.
  */
 
-#ifndef _SOC_CANNONLAKE_LPDDR4_INIT_H_
-#define _SOC_CANNONLAKE_LPDDR4_INIT_H_
+#ifndef _SOC_CANNONLAKE_MEMCFG_INIT_H_
+#define _SOC_CANNONLAKE_MEMCFG_INIT_H_
 
 #include <stddef.h>
 #include <stdint.h>
@@ -24,15 +24,15 @@
 #define DQ_BITS_PER_DQS 8
 
 /*
- * Number of LPDDR4 packages, where a "package" represents a 64-bit solution.
+ * Number of memory packages, where a "package" represents a 64-bit solution.
  */
-#define LP4_NUM_PACKAGES 2
+#define DDR_NUM_PACKAGES 2
 
 /* 64-bit Channel identification */
 enum {
-	LP4_CH0,
-	LP4_CH1,
-	LP4_NUM_CHANNELS
+	DDR_CH0,
+	DDR_CH1,
+	DDR_NUM_CHANNELS
 };
 
 struct spd_by_pointer {
@@ -46,10 +46,11 @@ struct spd_info {
 		int spd_index;
 		struct spd_by_pointer spd_data_ptr_info;
 	} spd_spec;
+	const uint8_t spd_smbus_address[4];
 };
 
-/* Board-specific lpddr4 dq mapping information */
-struct lpddr4_cfg {
+/* Board-specific memory dq mapping information */
+struct cnl_mb_cfg {
 	/*
 	 * For each channel, there are 3 sets of DQ byte mappings,
 	 * where each set has a package 0 and a package 1 value (package 0
@@ -61,7 +62,7 @@ struct lpddr4_cfg {
 	 * and let the meminit_lpddr4() routine take care of clearing the
 	 * unused fields for the caller.
 	 */
-	const uint8_t dq_map[LP4_NUM_CHANNELS][3][LP4_NUM_PACKAGES];
+	const uint8_t dq_map[DDR_NUM_CHANNELS][3][DDR_NUM_PACKAGES];
 
 	/*
 	 * DQS CPU<>DRAM map Ch0 and Ch1.  Each array entry represents a
@@ -70,7 +71,7 @@ struct lpddr4_cfg {
 	 * on the memory part, and the values in the array represent which
 	 * pin on the CPU that DRAM pin connects to.
 	 */
-	const uint8_t dqs_map[LP4_NUM_CHANNELS][DQ_BITS_PER_DQS];
+	const uint8_t dqs_map[DDR_NUM_CHANNELS][DQ_BITS_PER_DQS];
 
 	/*
 	 * Rcomp resistor values.  These values represent the resistance in
@@ -92,15 +93,23 @@ struct lpddr4_cfg {
 	 */
 	const uint8_t dq_pins_interleaved;
 
+	/*
+	 * VREF_CA configuraation.
+	 * Set to 0 VREF_CA goes to both CH_A and CH_B,
+	 * set to 1 VREF_CA goes to CH_A and VREF_DQ_A goes to CH_B,
+	 * set to 2 VREF_CA goes to CH_A and VREF_DQ_B goes to CH_B.
+	 */
+	const uint8_t vref_ca_config;
+
 	/* Early Command Training Enabled */
 	const uint8_t ect;
 };
 
 /*
- * Initialize default LPDDR4 settings for CannonLake.
+ * Initialize default memory configurations for CannonLake.
  */
-void cannonlake_lpddr4_init(FSP_M_CONFIG *mem_cfg,
-			const struct lpddr4_cfg *cnl_cfg,
+void cannonlake_memcfg_init(FSP_M_CONFIG *mem_cfg,
+			const struct cnl_mb_cfg *cnl_cfg,
 			const struct spd_info *spd);
 
-#endif /* _SOC_CANNONLAKE_LPDDR4_INIT_H_ */
+#endif /* _SOC_CANNONLAKE_MEMCFG_INIT_H_ */