mainboard/lenovo/t430s: Add ThinkPad T431s as a variant

The code is based on autoport and that for T430s

Tested:
- CPU i5-3337U
- Slotted DIMM 2GiB
- Soldered RAM 4GiB from samsung (There may be more models here)
- Camera
- pci-e and usb2 on M.2 slot with A key for wlan
- sata and usb2  (no superspeed components) on M.2 slot with B key for wwan
- On board SDHCI connected to pci-e
- USB3 ports
- libgfxinit-based graphic init
- NVRAM options for North and South bridges
- Sound
- Thinkpad EC
- S3
- TPM1 on LPC
- EHCI debug on SSP2 (USB3 port on the left)
- Linux 4.9.110-3 within Debian GNU/Linux stable, loaded from
  Linux payload (Heads), Seabios may also work.

Not tested:
- Fingerprint reader on USB2 (not present on mine)
- Keyboard backlight (not present on mine)
- "sticky_fn" flag in nvram

Not implemented yet:
- Fn locking in nvram (may not be identical to "sticky_fn")
- C-based native graphic init (since T431s has eDP instead of LVDS)
- Detecting the model of Soldered RAM at runtime, and loading the
  corresponding SPD datum (3 observed) from CBFS (the mechanism may be
  similar to that on x1_carbon_gen1 and s230u, but I do not know how
  to find gpio ports for that, and SPD data stored in vendor firmware.)

Change-Id: Ic8062cacf5e8232405bb5757e1b1d063541f354a
Signed-off-by: Bill XIE <persmule@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30021
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

2 files changed, 47 insertions, 0 deletions

diff --git a/src/mainboard/lenovo/t430s/variants/t431s/spd/Makefile.inc b/src/mainboard/lenovo/t430s/variants/t431s/spd/Makefile.inc
new file mode 100644
index 0000000000..4b9ef55007
--- /dev/null
+++ b/src/mainboard/lenovo/t430s/variants/t431s/spd/Makefile.inc
@@ -0,0 +1,31 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2016 Alexander Couzens <lynxis@fe80.eu>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+SPD_BIN = $(obj)/spd.bin
+
+SPD_SOURCES  = samsung_4gb  # 0b0010 4GiB
+SPD_DEPS := $(foreach f, $(SPD_SOURCES), src/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/spd/$(f).spd.hex)
+
+# Include spd ROM data
+$(SPD_BIN): $(SPD_DEPS)
+	for f in $+; \
+	  do for c in $$(cat $$f | grep -v ^#); \
+	    do printf $$(printf '\%o' 0x$$c); \
+	  done; \
+	done > $@
+
+cbfs-files-y += spd.bin
+spd.bin-file := $(SPD_BIN)
+spd.bin-type := spd
diff --git a/src/mainboard/lenovo/t430s/variants/t431s/spd/samsung_4gb.spd.hex b/src/mainboard/lenovo/t430s/variants/t431s/spd/samsung_4gb.spd.hex
new file mode 100644
index 0000000000..544d57605d
--- /dev/null
+++ b/src/mainboard/lenovo/t430s/variants/t431s/spd/samsung_4gb.spd.hex
@@ -0,0 +1,16 @@
+92 11 0b 03 04 00 00 01 03 52 01 08 0a 00 80 00
+6e 78 6e 32 6e 11 18 81 20 08 3c 3c 00 f0 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 65 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 b6 3b
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00