mb/amd/majolica: add functionality to add EC blob to build

Without the EC blob being present in the SPI flash, the board won't even
power up.

Change-Id: Ia3c50e86414bbc707bc33e28c636196c1be2f1e6
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48250
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/mainboard/amd/majolica/Kconfig

@@ -7,10 +7,26 @@ config BOARD_SPECIFIC_OPTIONS
 	select SOC_AMD_CEZANNE
 	select MISSING_BOARD_RESET
 
+config FMDFILE
+	string
+	default "src/mainboard/amd/majolica/board.fmd"
+
 config MAINBOARD_DIR
 	default "amd/majolica"
 
 config MAINBOARD_PART_NUMBER
 	default "MAJOLICA"
 
+config MAJOLICA_HAVE_MCHP_FW
+	bool "Have Microchip EC firmware?"
+	default n
+
+config MAJOLICA_MCHP_FW_FILE
+	string
+	depends on MAJOLICA_HAVE_MCHP_FW
+	default "3rdparty/blobs/mainboard/amd/majolica/EC_majolica.bin"
+	help
+	  The EC firmware blob is usually the first 128kByte of the stock
+	  firmware image.
+
 endif # BOARD_AMD_MAJOLICA

src/mainboard/amd/majolica/Makefile.inc

@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+PHONY+=add_mchp_fw
+INTERMEDIATE+=add_mchp_fw
+
+ifeq ($(CONFIG_MAJOLICA_HAVE_MCHP_FW),y)
+add_mchp_fw: $(obj)/coreboot.pre
+	$(CBFSTOOL) $(obj)/coreboot.pre write -r EC -f $(CONFIG_MAJOLICA_MCHP_FW_FILE) --fill-upward
+else
+files_added:: warn_no_mchp
+endif # CONFIG_MAJOLICA_HAVE_MCHP_FW
+
+PHONY+=warn_no_mchp
+warn_no_mchp:
+	printf "\n\t** WARNING **\n"
+	printf "coreboot has been built without an the Microchip EC FW.\n"
+	printf "Do not flash this image.  Your Majolica's power button\n"
+	printf "will not respond when you press it.\n\n"

src/mainboard/amd/majolica/board.fmd

@@ -0,0 +1,8 @@
+FLASH@0xFF000000 16M {
+	BIOS {
+		EC 128K
+		RW_MRC_CACHE 64K
+		FMAP 4K
+		COREBOOT(CBFS)
+	}
+}