SB800: Add IMC ROM and fan control.

Add configuration for AMD's IMC ROM and fan registers for cimx/sb800
platforms.

- Allows user to add the IMC rom to the build and to configure the
  location of the "signature" between the allowed positions.
- Allows for no fan control, manual setup of SB800 Fan registers, or
  setup of the IMC fan configuration registers.
- Register configuration is done through devicetree.cb. No files need
  to be added for new platform configuration.
- Initial setup is for Persimmon, but may be extended to any cimx/sb800
  platform.

Change-Id: Ib06408d794988cbb29eed6adbeeadea8b2629bae
Signed-off-by: Martin Roth <martin@se-eng.com>
Reviewed-on: http://review.coreboot.org/1977
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Marc Jones <marcj303@gmail.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/southbridge/amd/cimx/sb800/Makefile.inc b/src/southbridge/amd/cimx/sb800/Makefile.inc
index bea976356a..064cbc7122 100644
--- a/src/southbridge/amd/cimx/sb800/Makefile.inc
+++ b/src/southbridge/amd/cimx/sb800/Makefile.inc
@@ -27,6 +27,8 @@ romstage-y += smbus.c
 ramstage-y += cfg.c
 ramstage-y += late.c
 
+ramstage-$(CONFIG_SB800_MANUAL_FAN_CONTROL) += fan.c
+ramstage-$(CONFIG_SB800_IMC_FAN_CONTROL) += fan.c
 ramstage-$(CONFIG_HAVE_ACPI_RESUME) += spi.c
 ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += fadt.c
 
@@ -53,3 +55,41 @@ ifeq ($(CONFIG_SB800_SATA_RAID), y)
 	raid/misc.bin-position := $(CONFIG_RAID_MISC_ROM_POSITION)
 	raid/misc.bin-type := raw
 endif
+
+ifeq ($(CONFIG_SB800_IMC_FWM), y)
+
+# ROMSIG At ROMBASE + 0x20000:
+# +-----------+---------------+----------------+------------+
+# |0x55AA55AA |EC ROM Address |GEC ROM Address |            |
+# +-----------+---------------+----------------+------------+
+# EC ROM should be 64K aligned.
+SB800_FWM_POSITION=$(shell printf %u $(CONFIG_SB800_FWM_POSITION))
+#assume the cbfs header is less than 128 bytes.
+ROMSIG_SIZE=16
+
+SB800_IMC_POSITION_UNALIGN=$(shell echo $(SB800_FWM_POSITION) $(ROMSIG_SIZE) 128 65535 | awk '{print $$1 + $$2 + $$3 + $$4}')
+SB800_IMC_POSITION=$(shell echo $(SB800_IMC_POSITION_UNALIGN) | awk '{print $$1 - $$1 % 65536}')
+
+$(obj)/coreboot_SB800_romsig.bin: \
+			$(call strip_quotes, $(CONFIG_SB800_IMC_FWM_FILE)) \
+			$(obj)/config.h \
+			$(obj)/mainboard/$(MAINBOARDDIR)/static.c
+	echo "    SB800 FW  $@"
+	for fwm in 1437226410 \
+		$(SB800_IMC_POSITION) \
+		0 \
+		0 ; do \
+		echo  $$fwm | LC_ALL=C awk '{printf ("%c%c%c%c", $$1 % 256, int($$1/256) % 256, int($$1/65536) % 256, int($$1/16777216));}'; \
+	done > $@
+
+cbfs-files-y += SB800/fwm
+SB800/fwm-file := $(obj)/coreboot_SB800_romsig.bin
+SB800/fwm-position := $(SB800_FWM_POSITION)
+SB800/fwm-type := raw
+
+cbfs-files-y += SB800/imc
+SB800/imc-file := $(call strip_quotes, $(CONFIG_SB800_IMC_FWM_FILE))
+SB800/imc-position := $(SB800_IMC_POSITION)
+SB800/imc-type := raw
+
+endif