lenovo/s230u: Add Thinkpad Twist (S230U)

Created using autoport plus some manual work and copying from G505S to
account for the non-H8 EC.

This model uses the same ENE KB9012 EC as the G505S.

Tested:
- Mainboard variant with 8GB Elpida DDR3
- SeaBIOS payload
- Booting into Linux 4.9.6 with Debian/unstable installed on the
  internal HDD/SDD slot
- Native raminit
- Both native VGA init and option rom VGA init
- Basic TPM functionality (auto-detection and RNG)
- Battery status readout
- Basic ACPI functions (power button event; power-off; reboot)
- thinkpad-acpi hotkey functions
- thinkpad-acpi LED control (red thinkpad LED)
- Suspend to RAM and resume works
- Mini displayport output works

Known issues:
- Patches needed for EC battery support
  https://review.coreboot.org/#/c/18348/
  https://review.coreboot.org/#/c/18349/
- No thermal zone since temperature sensing is not H8-compatible
  and needs to be reverse engineered.

Not tested:
- msata/wwan (probably works)

Signed-off-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de>
Change-Id: I52bc4515277e5c18afbb14a80a9ac788049f485c
Reviewed-on: https://review.coreboot.org/18351
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/src/mainboard/lenovo/s230u/acpi/platform.asl b/src/mainboard/lenovo/s230u/acpi/platform.asl
new file mode 100644
index 0000000000..d90715ab51
--- /dev/null
+++ b/src/mainboard/lenovo/s230u/acpi/platform.asl
@@ -0,0 +1,50 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (c) 2017 Tobias Diedrich <ranma+coreboot@tdiedrich.de>
+ *
+ * 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.
+ */
+
+Method(_WAK,1)
+{
+	/* Turn on radios */
+	Store (One, GP33) /* WLBT_OFF_5# (To pin 5 of WiFi mPCIe) */
+	Store (One, GP36) /* WLBT_OFF_51# (To pin 51 of WiFi mPCIe) */
+	/* There also is RF_OFF# on pin 20, controlled by the EC */
+
+	Return(Package(){0,0})
+}
+
+Method(_PTS,1)
+{
+	/* Turn off radios */
+	Store (Zero, GP33) /* WLBT_OFF_5# (To pin 5 of WiFi mPCIe) */
+	Store (Zero, GP36) /* WLBT_OFF_51# (To pin 51 of WiFi mPCIe) */
+	/* There also is RF_OFF# on pin 20, controlled by the EC */
+}
+
+Scope(\_SI)
+{
+	Method(_SST, 1, NotSerialized)
+	{
+		If (LLess(Arg0, 2))
+		{
+			/* Thinkpad LED on */
+			\_SB.PCI0.LPCB.EC0.LED (Zero, 0x80)
+		}
+		Else
+		{
+			/* Thinkpad LED blinking */
+			\_SB.PCI0.LPCB.EC0.LED (Zero, 0xC0)
+		}
+	}
+}