ec/starlabs: Add standardised ITE EC support

Add EC support that supports different Q Events and EC memory.
Created from the ITE IT5570E and IT8987E datasheets, all using
data port 0x4e.

Tested with Ubuntu 20.04.3 and Windows 10 on:

* StarBook Mk V (TGL + IT5570E):
*  ITE Firmware 1.00
*  Merlin Firmware 1.00

* LabTop Mk IV (CML + IT8987E):
*  ITE Firmware 1.04

* LabTop Mk III (KBL + IT8987E):
*  ITE Firmware 3.12

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: I8023c26de23c874c84106fda96e64dcfa0c5ba32
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58343
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Andy Pont <andy.pont@sdcsystems.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/ec/starlabs/merlin/Kconfig b/src/ec/starlabs/merlin/Kconfig
new file mode 100644
index 0000000000..fe94b85963
--- /dev/null
+++ b/src/ec/starlabs/merlin/Kconfig
@@ -0,0 +1,57 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+config EC_STARLABS_ITE
+	bool
+	select EC_ACPI
+	help
+	  Interface to ITE embedded controller principally in Star Labs notebooks.
+	  Works with closed-source ITE firmware versions:
+	  TGL - 1.00 or later
+	  CML - 1.04 or later
+	  KBL - 3.12 or later
+	  And open-source Merlin firmware version 1.00 or later
+
+config EC_STARLABS_NEED_ITE_BIN
+	bool
+	depends on EC_STARLABS_ITE
+	help
+	  Select if the mainboard requires EC firmware in the main flash chip.
+
+config EC_STARLABS_ADD_ITE_BIN
+	bool "Add Star Labs EC binary file"
+	default n
+	depends on EC_STARLABS_NEED_ITE_BIN
+	help
+	  Select to add an EC firmware binary into the coreboot image. EC firmware
+	  is necessary, flashing a coreboot image without EC firmware will render
+	  your laptop unusable.
+
+config EC_STARLABS_ITE_BIN_PATH
+	string "Star Labs EC binary file path"
+	depends on EC_STARLABS_ADD_ITE_BIN
+
+config EC_STARLABS_KBL_LEVELS
+	bool
+	default n
+	depends on EC_STARLABS_ITE
+	help
+	  Select if the mainboard supports multiple levels of brightness for the keyboard.
+
+config EC_STARLABS_FAN
+	bool
+	default n
+	depends on EC_STARLABS_ITE
+	help
+	  Select if the mainboard has a fan.
+
+config EC_STARLABS_MERLIN
+	bool "Use open-source Merlin EC Firmware"
+	default n
+	depends on EC_STARLABS_ITE
+	help
+	  Use open source embedded controller firmware. Both firmwares have the
+	  same features but differ in licensing and compilers.
+
+config EC_VARIANT_DIR
+	string
+	default "merlin" if EC_STARLABS_MERLIN