mb/intel/mtlrvp: Add romstage and configure LP5 memory parts

This patch adds initial romstage code and spd data for LP5 memory
parts for MTL-RVP. This also configures memory based on the board id.

Memory - x32 LPDDR5
Vendor/Model - Micron/MT62F2G32D8DR-031 WT:B
Board ID -
         0b0000 - Empty spd hex file
         0b0001 - DDR5 (Empty spd hex file)
         0b0010 - LPDDR5 (MT62F2G32D8DR-031 WT:B)

BUG=b:224325352
TEST=Able to boot intel/mtlrvp (LP5 SKU) to ChromeOS

Signed-off-by: Ashish Kumar Mishra <ashish.k.mishra@intel.com>
Change-Id: I15b352eb246aed23da273e56490c7094eae9d176
Signed-off-by: Harsha B R <harsha.b.r@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69741
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/mainboard/intel/mtlrvp/Kconfig

@@ -3,6 +3,7 @@ config BOARD_INTEL_MTLRVP_COMMON
 	select BOARD_ROMSIZE_KB_32768
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES
+	select HAVE_SPD_IN_CBFS
 	select MAINBOARD_HAS_CHROMEOS
 	select SOC_INTEL_CSE_LITE_SKU
 	select SOC_INTEL_METEORLAKE
@@ -63,6 +64,9 @@ config OVERRIDE_DEVICETREE
 	string
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
+config DIMM_SPD_SIZE
+	default 512
+
 choice
 	prompt "ON BOARD EC"
 	default MTL_INTEL_EC if BOARD_INTEL_MTLRVP_P

src/mainboard/intel/mtlrvp/Makefile.inc

@@ -17,6 +17,7 @@ BASEBOARD_DIR:=$(call strip_quotes,$(CONFIG_BASEBOARD_DIR))
 subdirs-y += variants/baseboard/$(BASEBOARD_DIR)
 subdirs-y += variants/baseboard/$(BASEBOARD_DIR)/memory
 subdirs-y += variants/$(VARIANT_DIR)
+subdirs-$(CONFIG_HAVE_SPD_IN_CBFS) += spd
 
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/baseboard/include
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/baseboard/$(BASEBOARD_DIR)/include

src/mainboard/intel/mtlrvp/romstage.c

@@ -5,12 +5,32 @@
 #include <ec/intel/board_id.h>
 #include <soc/romstage.h>
 
+#define SPD_ID_MASK 0x7
+
+static size_t get_spd_index(void)
+{
+	uint8_t board_id = get_rvp_board_id();
+	size_t spd_index;
+
+	printk(BIOS_INFO, "board id is 0x%x\n", board_id);
+
+	spd_index = board_id & SPD_ID_MASK;
+
+	printk(BIOS_INFO, "SPD index is 0x%x\n", (unsigned int)spd_index);
+	return spd_index;
+}
+
 void mainboard_memory_init_params(FSPM_UPD *memupd)
 {
 	const struct mb_cfg *mem_config = variant_memory_params();
 	int board_id = get_rvp_board_id();
 	const bool half_populated = false;
 
+	const struct mem_spd memory_down_spd_info = {
+		.topo = MEM_TOPO_MEMORY_DOWN,
+		.cbfs_index = get_spd_index(),
+	};
+
 	const struct mem_spd dimm_module_spd_info = {
 		.topo = MEM_TOPO_DIMM_MODULE,
 		.smbus = {
@@ -37,6 +57,10 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 	case MTLP_DDR5_RVP:
 		memcfg_init(memupd, mem_config, &dimm_module_spd_info, half_populated);
 		break;
+	case MTLP_LP5_T3_RVP:
+	case MTLP_LP5_T4_RVP:
+		memcfg_init(memupd, mem_config, &memory_down_spd_info, half_populated);
+		break;
 	default:
 		die("Unknown board id = 0x%x\n", board_id);
 		break;

src/mainboard/intel/mtlrvp/spd/Makefile.inc

@@ -0,0 +1,6 @@
+## SPDX-License-Identifier: GPL-2.0-or-later
+##
+
+ifneq ($(SPD_SOURCES),)
+LIB_SPD_DEPS := $(SPD_SOURCES)
+endif

src/mainboard/intel/mtlrvp/variants/baseboard/mtlrvp_p/memory/Makefile.inc

@@ -1,3 +1,8 @@
 ## SPDX-License-Identifier: GPL-2.0-or-later
 
 romstage-y += memory.c
+
+SPD_SOURCES =
+SPD_SOURCES += spd/lp5/set-0/spd-empty.hex	# ID = 0(0b0000)
+SPD_SOURCES += spd/lp5/set-0/spd-empty.hex	# ID = 1(0b0001)
+SPD_SOURCES += spd/lp5/set-0/spd-4.hex		# ID = 2(0b0010)  Parts = MT62F2G32D8DR-031 WT:B

src/mainboard/intel/mtlrvp/variants/baseboard/mtlrvp_p/memory/dram_id.generated.txt

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# This is an auto-generated file. Do not edit!!
+# Generated by:
+# util/spd_tools/bin/part_id_gen MTL lp5 src/mainboard/intel/mtlrvp/variants/baseboard/mtlrvp_p/memory/ src/mainboard/intel/mtlrvp/variants/baseboard/mtlrvp_p/memory/mem_parts_used.txt
+
+DRAM Part Name                 ID to assign
+MT62F2G32D8DR-031 WT:B         2 (0010)

src/mainboard/intel/mtlrvp/variants/baseboard/mtlrvp_p/memory/mem_parts_used.txt

@@ -0,0 +1,11 @@
+# This is a CSV file containing a list of memory parts used by this variant.
+# One part per line with an optional fixed ID in column 2.
+# Only include a fixed ID if it is required for legacy reasons!
+# Generated IDs are dependent on the order of parts in this file,
+# so new parts must always be added at the end of the file!
+#
+# Generate an updated Makefile.inc and dram_id.generated.txt by running the
+# part_id_gen tool from util/spd_tools.
+
+# Part Name
+MT62F2G32D8DR-031 WT:B,2

src/mainboard/intel/mtlrvp/variants/baseboard/mtlrvp_p/memory/memory.c

@@ -5,6 +5,68 @@
 #include <ec/intel/board_id.h>
 #include <soc/romstage.h>
 
+static const struct mb_cfg lp5_mem_config = {
+	.type = MEM_TYPE_LP5X,
+
+	/* DQ byte map as per doc #573387 */
+	.lpx_dq_map = {
+		.ddr0 = {
+			.dq0 = {  0,  3,  1,  2,  4,  5,  6,  7, },
+			.dq1 = {  12,  13,  14,  15,  11,  9,  10,  8 },
+		},
+		.ddr1 = {
+			.dq0 = {  3,  0,  1,  2,  5,  7,  6,  4, },
+			.dq1 = {  13,  10,  12,  15,  9,  11,  8,  14 },
+		},
+		.ddr2 = {
+			.dq0 = {  2,  1,  3,  0,  7,  5,  6,  4, },
+			.dq1 = {  12,  8,  13,  15,  11,  10,  9,  14 },
+		},
+		.ddr3 = {
+			.dq0 = {  4,  3,  0,  1,  5,  2,  6,  7, },
+			.dq1 = {  8,  15,  12,  14,  10,  13,  9,  11 },
+		},
+		.ddr4 = {
+			.dq0 = {  1,  3,  2,  6,  7,  5,  4,  0, },
+			.dq1 = {  14,  13,  12,  15,  11,  10,  8,  9 },
+		},
+		.ddr5 = {
+			.dq0 = {  0,  7,  3,  6,  2,  5,  1,  4, },
+			.dq1 = {  9,  10,  11,  8,  13,  14,  15,  12 },
+		},
+		.ddr6 = {
+			.dq0 = {  3,  0,  2,  1,  6,  5,  4,  7, },
+			.dq1 = {  15,  13,  12,  14,  8,  11,  10,  9 },
+		},
+		.ddr7 = {
+			.dq0 = {  2,  1,  3,  0,  6,  4,  7,  5, },
+			.dq1 = {  14,  12,  13,  15,  9,  10,  11,  8 },
+		},
+	},
+
+	/* DQS CPU<>DRAM map as per doc #573387 */
+	.lpx_dqs_map = {
+		.ddr0 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr1 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr2 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr3 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr4 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr5 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr6 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr7 = { .dqs0 = 0, .dqs1 = 1 }
+	},
+
+	.ect = false, /* Early Command Training */
+
+	.LpDdrDqDqsReTraining = 1,
+
+	.UserBd = BOARD_TYPE_ULT_ULX,
+
+	.lp5x_config = {
+		.ccc_config = 0,
+	},
+};
+
 static const struct mb_cfg ddr5_mem_config = {
 	.type = MEM_TYPE_DDR5,
 
@@ -31,6 +93,9 @@ const struct mb_cfg *variant_memory_params(void)
 	switch (board_id) {
 	case MTLP_DDR5_RVP:
 		return &ddr5_mem_config;
+	case MTLP_LP5_T3_RVP:
+	case MTLP_LP5_T4_RVP:
+		return &lp5_mem_config;
 	default:
 		die("Unknown board id = 0x%x\n", board_id);
 		break;