google/buddy: Add board as variant of google/auron

Add google/buddy (Acer Chromeboase 24) as a variant of google/auron,
with the following changes:

- add buddy-specific variant code
- add handling to auron for buddy's lan init, which no other variants have
- add handling to auron's mainboard ACPI due buddy having different PCIe
  port assigments than all other variants

Ported from Chromium branch firmware-buddy-6301.202.B, commit
ebb82ce [Buddy: Lock management engine + SPI descriptor]

Test: build/boot Linux on google/buddy using SeaBIOS and Tianocore payloads

Change-Id: Ib76eef47677b72ddaef81a2decef189a5f20c20a
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/28613
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

3 files changed, 143 insertions, 0 deletions

diff --git a/src/mainboard/google/auron/variants/buddy/include/variant/acpi/ec.asl b/src/mainboard/google/auron/variants/buddy/include/variant/acpi/ec.asl
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/src/mainboard/google/auron/variants/buddy/include/variant/acpi/ec.asl
diff --git a/src/mainboard/google/auron/variants/buddy/include/variant/acpi/mainboard.asl b/src/mainboard/google/auron/variants/buddy/include/variant/acpi/mainboard.asl
new file mode 100644
index 0000000000..788fbdc61e
--- /dev/null
+++ b/src/mainboard/google/auron/variants/buddy/include/variant/acpi/mainboard.asl
@@ -0,0 +1,143 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 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.
+ */
+
+Scope (\_SB.PCI0.I2C0)
+{
+	Device (RTEK)
+	{
+		Name (_HID, "10EC5650")
+		Name (_CID, "10EC5650")
+		Name (_DDN, "RTEK Codec Controller ")
+		Name (_UID, 1)
+
+		Name (_CRS, ResourceTemplate()
+		{
+			I2cSerialBus (
+				0x1A,                     // SlaveAddress
+				ControllerInitiated,      // SlaveMode
+				400000,                   // ConnectionSpeed
+				AddressingMode7Bit,       // AddressingMode
+				"\\_SB.PCI0.I2C0",        // ResourceSource
+			)
+
+			Interrupt (ResourceConsumer, Edge, ActiveLow){ 37 }
+		})
+
+		Method (_STA)
+		{
+			If (LEqual (\S1EN, 1)) {
+				Return (0xF)
+			} Else {
+				Return (0x0)
+			}
+		}
+	}
+}
+
+Scope (\_SB.PCI0.I2C1)
+{
+	Device (ETSA)
+	{
+		Name (_HID, "ELAN0001")
+		Name (_DDN, "Elan Touchscreen")
+		Name (_UID, 6)
+		Name (ISTP, 0) /* Touchscreen */
+
+		Name (_CRS, ResourceTemplate()
+		{
+			I2cSerialBus (
+				0x10,                     // SlaveAddress
+				ControllerInitiated,      // SlaveMode
+				400000,                   // ConnectionSpeed
+				AddressingMode7Bit,       // AddressingMode
+				"\\_SB.PCI0.I2C1",        // ResourceSource
+			)
+			Interrupt (ResourceConsumer, Level, ActiveLow)
+			{
+				BOARD_TOUCHSCREEN_IRQ
+			}
+		})
+
+		Method (_STA)
+		{
+			If (LEqual (\S2EN, 1)) {
+				Return (0xF)
+			} Else {
+				Return (0x0)
+			}
+		}
+
+		Name (_PRW, Package() { BOARD_TOUCHSCREEN_WAKE_GPIO, 0x3 })
+
+		Method (_DSW, 3, NotSerialized)
+		{
+			Store (BOARD_TOUCHSCREEN_WAKE_GPIO, Local0)
+			If (LEqual (Arg0, 1)) {
+				// Enable GPIO as wake source
+				\_SB.PCI0.LPCB.GPIO.GWAK (Local0)
+			}
+		}
+
+		/* Allow device to power off in S0 */
+		Name (_S0W, 4)
+	}
+}
+
+/*
+ * LAN connected to Root Port 3, becomes Root Port 1 after coalesce
+ */
+Scope (\_SB.PCI0.RP01)
+{
+	Device (ETH0)
+	{
+		Name (_ADR, 0x00000000)
+		Name (_PRW, Package() { BUDDY_NIC_WAKE_GPIO, 3 })
+
+		Method (_DSW, 3, NotSerialized)
+		{
+			Store (BUDDY_NIC_WAKE_GPIO, Local0)
+
+			If (LEqual (Arg0, 1)) {
+				// Enable GPIO as wake source
+				\_SB.PCI0.LPCB.GPIO.GWAK (Local0)
+			}
+		}
+	}
+}
+
+/*
+ * WLAN connected to Root Port 4, becomes Root Port 2 after coalesce
+ */
+Scope (\_SB.PCI0.RP02)
+{
+	Device (WLAN)
+	{
+		Name (_ADR, 0x00000000)
+
+		/* GPIO10 is WLAN_WAKE_L_Q */
+		Name (GPIO, BOARD_WLAN_WAKE_GPIO)
+
+		Name (_PRW, Package() { GPIO, 3 })
+
+		Method (_DSW, 3, NotSerialized)
+		{
+			If (LEqual (Arg0, 1)) {
+				// Enable GPIO as wake source
+				\_SB.PCI0.LPCB.GPIO.GWAK (^GPIO)
+			}
+		}
+	}
+}
diff --git a/src/mainboard/google/auron/variants/buddy/include/variant/acpi/usb.asl b/src/mainboard/google/auron/variants/buddy/include/variant/acpi/usb.asl
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/src/mainboard/google/auron/variants/buddy/include/variant/acpi/usb.asl