NEW BOARD: Dell Precision T1650

Very nice ivybridge board that supports ECC RAM.
NOTE: I couldn't get onboard graphics working yet, but
this was confirmed working with a graphics card (in my
case nvidia quadra k420) booted in text mode on the SeaBIOS
payload. The GRUB payload also works, when loaded from SeaBIOS.
Therefore, this is a SeaBIOS-only board (as far as first payload
is concerned), but you can pick GRUB from the menu.

You could make it "GRUB-only" in practise by setting SeaBIOS
boot order to only load GRUB, and disable the SeaBIOS menu.
We refer to this as "SeaGRUB".

I've made lbmk use biosutilities and uefiextract, to
get at the SMSC SCH5545 Environmental Control (EC) firmware.
This firmware is needed for fan control. This is automatically
downloaded and extracted, from Dell UEFI firmware updates.

As with other blobs such as Intel ME, this firmware is then
scrubbed by the release build scripts. The blobutil "inject"
script can be used to re-insert it.

Of note: there is no fixed offset, but no other blobs to
be inserted in CBFS either, so the offset when re-inserting
on release ROMs should still be the same, and thus the ROM
checksums should match, when running blobutil inject.

Signed-off-by: Leah Rowe <leah@libreboot.org>

2 files changed, 112 insertions, 1 deletions

diff --git a/resources/scripts/update/blobs/download b/resources/scripts/update/blobs/download
index 9beacab8..9fd2a6b9 100755
--- a/resources/scripts/update/blobs/download
+++ b/resources/scripts/update/blobs/download
@@ -19,6 +19,9 @@ e6400_vga_dl_url=""
 e6400_vga_dl_url_bkup=""
 e6400_vga_offset=""
 e6400_vga_romname=""
+sch5545ec_dl_url=""
+sch5545ec_dl_url_bkup=""
+sch5545ec_dl_hash=""
 
 cbdir="coreboot/default"
 cbcfgsdir="resources/coreboot"
@@ -31,6 +34,8 @@ e6400_unpack="$(pwd)/bios_extract/dell_inspiron_1100_unpacker.py"
 me7updateparser="$(pwd)/resources/blobs/me7_update_parser.py"
 kbc1126_ec_dump="$(pwd)/${cbdir}/util/kbc1126/kbc1126_ec_dump"
 board=""
+pfs_extract="$(pwd)/biosutilities/Dell_PFS_Extract.py"
+uefiextract="$(pwd)/uefitool/uefiextract"
 _b="" # board shorthand without e.g. _4mb (avoid duplication per flash size)
 
 CONFIG_HAVE_MRC=""
@@ -40,6 +45,8 @@ CONFIG_HAVE_GBE_BIN=""
 CONFIG_KBC1126_FIRMWARE=""
 CONFIG_BOARD_DELL_E6400=""
 CONFIG_VGA_BIOS_FILE=""
+CONFIG_INCLUDE_SMSC_SCH5545_EC_FW=""
+CONFIG_SMSC_SCH5545_EC_FW_FILE=""
 
 main()
 {
@@ -92,11 +99,15 @@ detect_firmware()
 			&& [ "${CONFIG_VGA_BIOS_FILE}" != "" ]; then
 		needs="${needs} E6400VGA"
 	fi
+	if [ "${CONFIG_INCLUDE_SMSC_SCH5545_EC_FW}" = "y" ]; then
+		needs="${needs} SCH5545EC"
+	fi
 	if [ -z ${needs+x} ]; then
 		printf 'No binary blobs needed for this board\n'
 		return 1
 	fi
-	printf "Firmware needed for board %s: %s\n" ${board} ${needs}
+	printf "Firmware needed for board '%s':\n" ${board}
+	printf "%s\n" ${needs}
 }
 
 scan_sources_config()
@@ -152,6 +163,18 @@ scan_sources_config()
 			set ${line}
 			e6400_vga_romname=${2}
 			;;
+		SCH5545EC_DL_hash*)
+			set ${line}
+			sch5545ec_dl_hash=${2}
+			;;
+		SCH5545EC_DL_url_bkup*)
+			set ${line}
+			sch5545ec_dl_url_bkup=${2}
+			;;
+		SCH5545EC_DL_url*)
+			set ${line}
+			sch5545ec_dl_url=${2}
+			;;
 		esac
 	done << EOF
 	$(eval "awk '${awkstr}' resources/blobs/sources")
@@ -174,6 +197,20 @@ build_dependencies()
 		./download bios_extract \
 				|| fail "could not download bios_extract"
 	fi
+	if [ ! -d biosutilities ]; then
+		printf "downloading biosutilities\n"
+		./download biosutilities \
+				|| fail "could not download biosutilities"
+	fi
+	if [ ! -d uefitool ]; then
+		printf "download uefitool (for UEFIExtract)\n"
+		./download uefitool \
+				|| fail "could not download uefitool"
+	fi
+	if [ ! -f uefitool/uefiextract ]; then
+		./build module uefitool \
+				|| fail "could not build uefitool"
+	fi
 	if [ ! -f ${cbdir}/util/kbc1126/kbc1126_ec_dump ]; then
 		printf "Building kbc1126_ec_dump from coreboot\n"
 		make -BC ${cbdir}/util/kbc1126 \
@@ -193,6 +230,9 @@ download_blobs()
 		*ME*)
 			download_blob_intel_me || _failed="${_failed} me"
 			;;
+		*SCH5545EC*)
+			download_sch5545ec || failed="${_failed} sch5545ec"
+			;;
 		*EC*)
 			download_ec || _failed="${_failed} ec"
 			;;
@@ -420,6 +460,51 @@ extract_e6400vga()
 	printf "E6400 Nvidia ROM saved to: %s\n" "${_vga_destination}"
 }
 
+download_sch5545ec()
+{
+	printf "Downloading SMSC SCH5545 Environment Controller firmware\n"
+
+	fetch_update sch5545ec || return 1
+	extract_sch5545ec || return 1
+}
+
+# TODO: this code is cancer. hardcoded is bad, and stupid.
+# TODO: make it *scan* (based on signature, in each file)
+extract_sch5545ec()
+{
+	printf "Extracting SCH5545 Environment Controller firmware for '%s'\n" \
+	    ${board}
+
+	_sch5545ec_destination=${CONFIG_SMSC_SCH5545_EC_FW_FILE#../../}
+
+	if [ -f "${_sch5545ec_destination}" ]; then
+		printf 'sch5545 firmware already downloaded\n'
+		return 0
+	fi
+
+	if [ -d "${appdir}" ]; then
+		rm -Rf "${appdir}"
+	fi
+	mkdir -p "${appdir}/"
+
+	cp "${dl_path}" "${appdir}/"
+	python "${pfs_extract}" "${appdir}/${dlsum}" -e || exit 1
+
+	# full system ROM (UEFI), to extract with UEFIExtract:
+	_bios="${appdir}/${dlsum}_extracted/Firmware"
+	_bios="${_bios}/1 ${dlsum} -- 1 System BIOS vA.28.bin"
+
+	# this is the SCH5545 firmware, inside of the extracted UEFI ROM:
+	_sch5545ec_fw="${_bios}.dump/4 7A9354D9-0468-444A-81CE-0BF617D890DF"
+	_sch5545ec_fw="${_sch5545ec_fw}/54 D386BEB8-4B54-4E69-94F5-06091F67E0D3"
+	_sch5545ec_fw="${_sch5545ec_fw}/0 Raw section/body.bin" # <-- this!
+
+	# this makes the file defined by _sch5545ec_fw available to copy
+	"${uefiextract}" "${_bios}" || exit 1
+
+	cp "${_sch5545ec_fw}" "${_sch5545ec_destination}" || exit 1
+}
+
 fetch_update()
 {
 	printf "Fetching vendor update for board: %s\n" ${board}
@@ -440,6 +525,10 @@ fetch_update()
 		dl=${e6400_vga_dl_url}
 		dl_bkup=${e6400_vga_dl_url_bkup}
 		dlsum=${e6400_vga_dl_hash}
+	elif [ "${fw_type}" = "sch5545ec" ]; then
+		dl="${sch5545ec_dl_url}"
+		dl_bkup="${sch5545ec_dl_url_bkup}"
+		dlsum="${sch5545ec_dl_hash}"
 	else
 		printf "Unsupported download type: %s\n" ${fw_type}
 		return 1
diff --git a/resources/scripts/update/blobs/inject b/resources/scripts/update/blobs/inject
index bc8a9a4d..97cb35a6 100755
--- a/resources/scripts/update/blobs/inject
+++ b/resources/scripts/update/blobs/inject
@@ -34,6 +34,8 @@ CONFIG_KBC1126_FW2_OFFSET=""
 CONFIG_VGA_BIOS_FILE=""
 CONFIG_VGA_BIOS_ID=""
 CONFIG_GBE_BIN_PATH=""
+CONFIG_INCLUDE_SMSC_SCH5545_EC_FW=""
+CONFIG_SMSC_SCH5545_EC_FW_FILE=""
 
 main()
 {
@@ -217,6 +219,11 @@ patch_rom()
 		inject_blob_dell_e6400_vgarom_nvidia
 	fi
 
+	if [ "${CONFIG_INCLUDE_SMSC_SCH5545_EC_FW}" = "y" ] \
+	    && [ "${CONFIG_SMSC_SCH5545_EC_FW_FILE}" != "" ]; then
+		inject_blob_smsc_sch5545_ec "${rom}"
+	fi
+
 	if [ "${modifygbe}" = "true" ] && ! [ "${release}" = "true" ]; then
 		modify_gbe ${rom}
 	fi
@@ -325,6 +332,21 @@ inject_blob_dell_e6400_vgarom_nvidia()
 		-t optionrom || exit 1
 }
 
+inject_blob_smsc_sch5545_ec()
+{
+	rom="${1}"
+
+	_sch5545ec_location="${CONFIG_SMSC_SCH5545_EC_FW_FILE#../../}"
+
+	if [ ! -f "${_sch5545ec_location}" ]; then
+		printf "SCH5545 firmware file missing\n" 1>&2
+		exit 1
+	fi
+
+	"${cbfstool}" "${rom}" add -f "${_sch5545ec_location}" \
+	    -n sch5545_ecfw.bin -t raw || exit 1
+}
+
 modify_gbe()
 {
 	printf "changing mac address in gbe to ${new_mac}\n"