google/caroline: Add as a variant of glados

Add google/caroline (Samsung Chromebook Pro) as a variant of
glados Skylake reference board:
- add caroline-specific DPTF, EC config, GPIO config, Kconfig,
    NHLT config, PEI data, VBT, SPD data, and devicetree
- add caroline-specific memory-init param to romstage
- adjust mainboard EC SCI events for boards with tablet function

Adapted from Chromium branch firmware-glados-7820.B, commit
b0c3efe54d877246d07f2467b2dff51cc30348fa [soc/intel/skylake: Enable VMX]

Test: build/boot google/caroline, verify correct functionality

Change-Id: I611a4e76581ba2e5b42e1bc48b0a5b8c70f3598e
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/27419
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 128 insertions, 0 deletions

diff --git a/src/mainboard/google/glados/variants/caroline/include/variant/acpi/mainboard.asl b/src/mainboard/google/glados/variants/caroline/include/variant/acpi/mainboard.asl
new file mode 100644
index 0000000000..19c883483b
--- /dev/null
+++ b/src/mainboard/google/glados/variants/caroline/include/variant/acpi/mainboard.asl
@@ -0,0 +1,128 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Google Inc.
+ *
+ * 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.
+ */
+
+#include <variant/gpio.h>
+
+#define BOARD_DIG_I2C_ADDR			0x09
+#define BOARD_DIG_IRQ				DIG_INT_L
+#define BOARD_DIG_PDCT				DIG_PDCT_L
+#define BOARD_DIG_EJECT				GPE_DIG_EJECT
+
+Scope (\_SB)
+{
+	Device (PENH)
+	{
+		Name (_HID, "PRP0001")
+
+		Name (_CRS, ResourceTemplate () {
+			GpioIo (Exclusive, PullNone, 0, 0, IoRestrictionInputOnly,
+				"\\_SB.PCI0.GPIO", 0, ResourceConsumer) { GPIO_DIG_EJECT }
+		})
+
+		Name (_DSD, Package () {
+			ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+			Package () {
+				Package () {
+					"compatible",
+					Package () { "gpio-keys"}
+				},
+			}
+		})
+
+		Device (EJCT)
+		{
+			Name (_ADR, Zero)
+
+			Name (_DSD, Package () {
+				ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+				Package () {
+					/* SW_PEN_INSERTED */
+					Package () { "linux,code", 0xf },
+					/* EV_SW type */
+					Package () { "linux,input-type", 0x5 },
+					Package () { "label", "pen_eject" },
+					Package () { "gpios",
+						Package () {
+							^^PENH, 0, 0, 1 /* inserted active low */
+						}
+					},
+				}
+			})
+		}
+	}
+}
+
+Scope (\_SB.PCI0.I2C2)
+{
+	Name (FMCN, Package () { 87, 197, 26 })
+
+	Device (DIGI)
+	{
+		Name (_HID, "ACPI0C50")
+		Name (_CID, "PNP0C50")
+		Name (_UID, 1)
+		Name (_S0W, 4)
+		Name (_PRW, Package () { BOARD_DIG_EJECT, 3 })
+
+		Name (_CRS, ResourceTemplate ()
+		{
+			I2cSerialBus (
+				BOARD_DIG_I2C_ADDR,
+				ControllerInitiated,
+				400000,
+				AddressingMode7Bit,
+				"\\_SB.PCI0.I2C2",
+			)
+			Interrupt (ResourceConsumer, Level, ActiveLow)
+			{
+				BOARD_DIG_IRQ
+			}
+		})
+
+		/*
+		 * Function 1 returns the offset in the I2C device register
+		 * address space at which the HID descriptor can be read.
+		 *
+		 * Arg0 = UUID
+		 * Arg1 = revision number of requested function
+		 * Arg2 = requested function number
+		 * Arg3 = function specific parameter
+		 */
+		Method (_DSM, 4, NotSerialized)
+		{
+			If (LEqual (Arg0, ToUUID
+			            ("3cdff6f7-4267-4555-ad05-b30a3d8938de"))) {
+				If (LEqual (Arg2, Zero)) {
+					/* Function 0 - Query */
+					If (LEqual (Arg1, One)) {
+						/* Revision 1 Function 1 */
+						Return (Buffer (One) { 0x03 })
+					} Else {
+						/* Revision 2+ not supported */
+						Return (Buffer (One) { 0x00 })
+					}
+				} ElseIf (LEqual (Arg2, One)) {
+					/* Function 1 - HID Descriptor Addr */
+					Return (0x0001)
+				} Else {
+					/* Function 2+ not supported */
+					Return (Buffer (One) { 0x00 })
+				}
+			} Else {
+				Return (Buffer (One) { 0x00 })
+			}
+		}
+	}
+}