mb/lenovo/x200: Add ThinkPad X301 as a variant

It is similar to X200s, with U-series CPU, slightly different gpio
setup, no docking support, and no superio chip.

Tested:
    - CPU Core 2 Duo U9400
    - Slotted DIMM 4GiB*2 from samsung
    - Camera
    - pci-e slots
    - sata and usb2
    - libgfxinit-based graphic init
    - NVRAM options for North and South bridges
    - Sound
    - Thinkpad EC
    - S3
    - Linux 4.19.67-2 within Debian GNU/Linux stable, loaded from
      Linux payload (Heads) and Seabios.

TODO: repurpose and/or rename flag H8_DOCK_EARLY_INIT (introduced in
      CB:4294 ) for h8-using devices without a dock.

Change-Id: Ic6a6059ccf15dd2e43ed4fc490c1d3c36aa1e817
Signed-off-by: Bill XIE <persmule@hardenedlinux.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36093
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

18 files changed, 325 insertions, 36 deletions

diff --git a/Documentation/mainboard/index.md b/Documentation/mainboard/index.md
index c9204f6df7..2aa276361e 100644
--- a/Documentation/mainboard/index.md
+++ b/Documentation/mainboard/index.md
@@ -72,6 +72,10 @@ The boards in this section are not real mainboards, but emulators.
 
 - [T410](lenovo/t410.md)
 
+### GM45 series
+
+- [X301](lenovo/x301.md)
+
 ### Sandy Bridge series
 
 - [T420](lenovo/t420.md)
diff --git a/Documentation/mainboard/lenovo/x301.md b/Documentation/mainboard/lenovo/x301.md
new file mode 100644
index 0000000000..28b512d24d
--- /dev/null
+++ b/Documentation/mainboard/lenovo/x301.md
@@ -0,0 +1,44 @@
+# Lenovo X301
+
+## Disassembly Instructions
+
+You must remove the following parts to access the SPI flash:
+
+![X301 with WSON8 chip replaced with SOIC8 chip](x301_kb_removed.jpg)
+
+* Battery pack
+* Keyboard
+
+Its [Hardware Maintenance Manual](https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/43y9441.pdf) can be used as a guidance of disassembly.
+
+The WSON-8 flash chip (surrounded with red circle in the photo above,
+already replaced with a SOIC-8 one) sits under a piece of insulating
+tape. If solders between the chip and soldering pads fortunately
+overflows beside the chip as tiny tin balls attached to soldering pads,
+it will be possible to use a pomona 5250 clip to hold the chip, with
+its metal tips just attached to tin balls, thus connecting the chip to
+the programmer. Otherwise, it may be recommended to replace it with a
+SOIC-8 one (you might need to add the chip to the IFD VSCC list), as
+what is done in the photo.
+
+The vendor IFD VSCC list contains:
+    -MACRONIX_MX25L6405 (0xc2, 0x2017)
+    -WINBOND_NEX_W25X64 (0xef, 0x3017)
+    -ATMEL_AT25DF641 (0x1f, 0x4800)
+
+```eval_rst
+:doc:`../../flash_tutorial/ext_power`
+```
+Tested:
+    - CPU Core 2 Duo U9400
+    - Slotted DIMM 4GiB*2 from samsung
+    - Camera
+    - pci-e slots
+    - sata and usb2
+    - libgfxinit-based graphic init
+    - NVRAM options for North and South bridges
+    - Sound
+    - Thinkpad EC
+    - S3
+    - Linux 4.19.67-2 within Debian GNU/Linux stable, loaded from
+      Linux payload (Heads) and Seabios.
diff --git a/Documentation/mainboard/lenovo/x301_kb_removed.jpg b/Documentation/mainboard/lenovo/x301_kb_removed.jpg
new file mode 100644
index 0000000000..1225dd7339
--- /dev/null
+++ b/Documentation/mainboard/lenovo/x301_kb_removed.jpg
diff --git a/src/mainboard/lenovo/x200/Kconfig b/src/mainboard/lenovo/x200/Kconfig
index 7b905bcfff..fab8a88a81 100644
--- a/src/mainboard/lenovo/x200/Kconfig
+++ b/src/mainboard/lenovo/x200/Kconfig
@@ -1,4 +1,4 @@
-if BOARD_LENOVO_X200
+if BOARD_LENOVO_X200 || BOARD_LENOVO_X301
 
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
@@ -28,9 +28,19 @@ config MAINBOARD_DIR
 	string
 	default lenovo/x200
 
+config VARIANT_DIR
+	string
+	default "x200" if BOARD_LENOVO_X200
+	default "x301" if BOARD_LENOVO_X301
+
 config MAINBOARD_PART_NUMBER
 	string
-	default "ThinkPad X200"
+	default "ThinkPad X200" if BOARD_LENOVO_X200
+	default "ThinkPad X301" if BOARD_LENOVO_X301
+
+config OVERRIDE_DEVICETREE
+	string
+	default "variants/$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
 config USBDEBUG_HCD_INDEX
 	int
@@ -44,4 +54,4 @@ config CBFS_SIZE
 	hex
 	default 0x200000
 
-endif # BOARD_LENOVO_X200
+endif # BOARD_LENOVO_X200 || BOARD_LENOVO_X301
diff --git a/src/mainboard/lenovo/x200/Kconfig.name b/src/mainboard/lenovo/x200/Kconfig.name
index 8e1dd430b1..54c79616e4 100644
--- a/src/mainboard/lenovo/x200/Kconfig.name
+++ b/src/mainboard/lenovo/x200/Kconfig.name
@@ -1,2 +1,5 @@
 config BOARD_LENOVO_X200
-	bool "ThinkPad X200 / X200t"
+	bool "ThinkPad X200 / X200s / X200t"
+
+config BOARD_LENOVO_X301
+	bool "ThinkPad X301"
diff --git a/src/mainboard/lenovo/x200/Makefile.inc b/src/mainboard/lenovo/x200/Makefile.inc
index ffd7cf22d1..f6c2c0c074 100644
--- a/src/mainboard/lenovo/x200/Makefile.inc
+++ b/src/mainboard/lenovo/x200/Makefile.inc
@@ -13,10 +13,10 @@
 ## GNU General Public License for more details.
 ##
 
-ramstage-y += dock.c
+ramstage-y += variants/$(VARIANT_DIR)/dock.c
 ramstage-y += cstates.c
 ramstage-y += blc.c
-romstage-y += gpio.c
+romstage-y += variants/$(VARIANT_DIR)/gpio.c
 
 ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads
 
diff --git a/src/mainboard/lenovo/x200/blc.c b/src/mainboard/lenovo/x200/blc.c
index 6c5779a0b2..0856060e86 100644
--- a/src/mainboard/lenovo/x200/blc.c
+++ b/src/mainboard/lenovo/x200/blc.c
@@ -23,6 +23,7 @@ static const struct blc_pwm_t blc_entries[] = {
 	/* corrected to 320MHz CDClk, vendor set 753; works fine at both: */
 	{"LTD121EQ3B", 447},
 	{"LTD121EWVB", 165},
+	{"LTD133EQ1B", 264},  /* Found on an X301  */
 	{"B121EW03 V6 ", 165},
 	/* datasheets: between 100 and 20k, typical 200 */
 	/* TESTED: works best at 400 */
diff --git a/src/mainboard/lenovo/x200/board_info.txt b/src/mainboard/lenovo/x200/board_info.txt
index c9cc0036d1..91d5bd8af0 100644
--- a/src/mainboard/lenovo/x200/board_info.txt
+++ b/src/mainboard/lenovo/x200/board_info.txt
@@ -1,5 +1,6 @@
 Category: laptop
-ROM package: SOIC-16 or SOIC-8
+Board name: Thinkpad X200/X200T/X200S/X301
+ROM package: SOIC-16 or SOIC-8 or WSON8
 ROM protocol: SPI
 ROM socketed: n
 Flashrom support: n
diff --git a/src/mainboard/lenovo/x200/devicetree.cb b/src/mainboard/lenovo/x200/devicetree.cb
index 4efcc255ec..fdd69ec91e 100644
--- a/src/mainboard/lenovo/x200/devicetree.cb
+++ b/src/mainboard/lenovo/x200/devicetree.cb
@@ -73,12 +73,6 @@ chip northbridge/intel/gm45
 			# Set thermal throttling to 75%.
 			register "throttle_duty"		= "THTL_75_0"
 
-			# Enable PCIe ports 1,2,4 as slots (Mini * PCIe).
-			register "pcie_slot_implemented"	= "0xb"
-			# Set power limits to 10 * 10^0 watts.
-			# Maybe we should set less for Mini PCIe.
-			register "pcie_power_limits" = "{ { 10, 0 }, { 10, 0 }, { 0, 0 }, { 10, 0 }, { 0, 0 }, { 0, 0 } }"
-			register "pcie_hotplug_map" = "{ 0, 0, 0, 1, 0, 0, 0, 0 }"
 			register "gen1_dec" = "0x007c1601"
 			register "gen2_dec" = "0x000c15e1"
 			register "gen3_dec" = "0x001c1681"
@@ -114,10 +108,7 @@ chip northbridge/intel/gm45
 			device pci 1c.2 on
 				subsystemid 0x17aa 0x20f3 # UWB
 			end # PCIe Port #3
-			device pci 1c.3 on
-				subsystemid 0x17aa 0x20f3 # Expresscard
-				smbios_slot_desc "7" "3" "ExpressCard Slot" "8"
-			end # PCIe Port #4
+			# PCIe Port #4 is configured in override tree.
 			device pci 1c.4 off end # PCIe Port #5
 			device pci 1c.5 off end # PCIe Port #6
 			device pci 1d.0 on # UHCI
@@ -154,7 +145,6 @@ chip northbridge/intel/gm45
 					device pnp ff.1 on # dummy
 					end
 					register "backlight_enable" = "0x01"
-					register "dock_event_enable" = "0x01"
 				end
 
 				chip ec/lenovo/h8
@@ -192,22 +182,6 @@ chip northbridge/intel/gm45
 					register "bdc_gpio_num" = "7"
 					register "bdc_gpio_lvl" = "0"
 				end
-
-				chip superio/nsc/pc87382
-					device pnp 164e.3 on # Digitizer
-						io 0x60 = 0x200
-						irq 0x29 = 0xb0
-						irq 0x70 = 0x5
-						irq 0xf0 = 0x82
-					end
-					# IR, not connected
-					device pnp 164e.2 off end
-					# GPIO, not connected
-					device pnp 164e.7 off end
-					# DLPC, not connected
-					device pnp 164e.19 off end
-				end
-
 			end
 			device pci 1f.2 on # SATA/IDE 1
 				subsystemid 0x17aa 0x20f8
diff --git a/src/mainboard/lenovo/x200/variants/x200/board_info.txt b/src/mainboard/lenovo/x200/variants/x200/board_info.txt
new file mode 100644
index 0000000000..c9cc0036d1
--- /dev/null
+++ b/src/mainboard/lenovo/x200/variants/x200/board_info.txt
@@ -0,0 +1,6 @@
+Category: laptop
+ROM package: SOIC-16 or SOIC-8
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: n
+Release year: 2008
diff --git a/src/mainboard/lenovo/x200/dock.c b/src/mainboard/lenovo/x200/variants/x200/dock.c
index 233b134702..bdd65a564a 100644
--- a/src/mainboard/lenovo/x200/dock.c
+++ b/src/mainboard/lenovo/x200/variants/x200/dock.c
@@ -21,9 +21,9 @@
 #include <ec/lenovo/h8/h8.h>
 #include <ec/acpi/ec.h>
 
-#include "dock.h"
+#include "../../dock.h"
 
-void h8_mainboard_init_dock (void)
+void h8_mainboard_init_dock(void)
 {
 	if (dock_present()) {
 		printk(BIOS_DEBUG, "dock is connected\n");
diff --git a/src/mainboard/lenovo/x200/gpio.c b/src/mainboard/lenovo/x200/variants/x200/gpio.c
index 516a3ae69b..516a3ae69b 100644
--- a/src/mainboard/lenovo/x200/gpio.c
+++ b/src/mainboard/lenovo/x200/variants/x200/gpio.c
diff --git a/src/mainboard/lenovo/x200/variants/x200/overridetree.cb b/src/mainboard/lenovo/x200/variants/x200/overridetree.cb
new file mode 100644
index 0000000000..dd08f1f515
--- /dev/null
+++ b/src/mainboard/lenovo/x200/variants/x200/overridetree.cb
@@ -0,0 +1,38 @@
+chip northbridge/intel/gm45
+	device domain 0 on
+		chip southbridge/intel/i82801ix
+			# Enable PCIe ports 1,2,3,4 as slots (Mini * PCIe).
+			register "pcie_slot_implemented"	= "0xf"
+			# Set power limits to 10 * 10^0 watts.
+			# Maybe we should set less for Mini PCIe.
+			register "pcie_power_limits" = "{ { 10, 0 }, { 10, 0 }, { 10, 0 }, { 10, 0 }, { 0, 0 }, { 0, 0 } }"
+			# Enable hotplug on PCIe port 4 (Express Card)
+			register "pcie_hotplug_map" = "{ 0, 0, 0, 1, 0, 0, 0, 0 }"
+
+			device pci 1c.3 on
+				subsystemid 0x17aa 0x20f3 # Expresscard
+				smbios_slot_desc "7" "3" "ExpressCard Slot" "8"
+			end # PCIe Port #4
+
+			device pci 1f.0 on # LPC bridge
+				chip ec/lenovo/pmh7
+					register "dock_event_enable" = "0x01"
+				end
+				chip superio/nsc/pc87382
+					device pnp 164e.3 on # Digitizer
+						io 0x60 = 0x200
+						irq 0x29 = 0xb0
+						irq 0x70 = 0x5
+						irq 0xf0 = 0x82
+					end
+					# IR, not connected
+					device pnp 164e.2 off end
+					# GPIO, not connected
+					device pnp 164e.7 off end
+					# DLPC, not connected
+					device pnp 164e.19 off end
+				end
+			end
+		end
+	end
+end
diff --git a/src/mainboard/lenovo/x200/variants/x301/board_info.txt b/src/mainboard/lenovo/x200/variants/x301/board_info.txt
new file mode 100644
index 0000000000..6ee5df0c6c
--- /dev/null
+++ b/src/mainboard/lenovo/x200/variants/x301/board_info.txt
@@ -0,0 +1,6 @@
+Category: laptop
+ROM package: WSON-8
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: n
+Release year: 2008
diff --git a/src/mainboard/lenovo/x200/variants/x301/dock.c b/src/mainboard/lenovo/x200/variants/x301/dock.c
new file mode 100644
index 0000000000..f8a2dc4260
--- /dev/null
+++ b/src/mainboard/lenovo/x200/variants/x301/dock.c
@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Sven Schnelle <svens@stackframe.org>
+ * Copyright (C) 2013 Vladimir Serbinenko <phcoder@gmail.com>
+ *
+ * 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 <ec/lenovo/h8/h8.h>
+
+void h8_mainboard_init_dock(void)
+{
+}
diff --git a/src/mainboard/lenovo/x200/variants/x301/gpio.c b/src/mainboard/lenovo/x200/variants/x301/gpio.c
new file mode 100644
index 0000000000..10ad18a855
--- /dev/null
+++ b/src/mainboard/lenovo/x200/variants/x301/gpio.c
@@ -0,0 +1,160 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * 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 <southbridge/intel/common/gpio.h>
+
+static const struct pch_gpio_set1 pch_gpio_set1_mode = {
+	.gpio1 = GPIO_MODE_GPIO,
+	.gpio2 = GPIO_MODE_GPIO,
+	.gpio3 = GPIO_MODE_GPIO,
+	.gpio4 = GPIO_MODE_GPIO,
+	.gpio5 = GPIO_MODE_GPIO,
+	.gpio6 = GPIO_MODE_GPIO,
+	.gpio7 = GPIO_MODE_GPIO,
+	.gpio8 = GPIO_MODE_GPIO,
+	.gpio9 = GPIO_MODE_GPIO,
+	.gpio13 = GPIO_MODE_GPIO,
+	.gpio17 = GPIO_MODE_GPIO,
+	.gpio18 = GPIO_MODE_GPIO,
+	.gpio19 = GPIO_MODE_GPIO,
+	.gpio20 = GPIO_MODE_GPIO,
+	.gpio21 = GPIO_MODE_GPIO,
+	.gpio22 = GPIO_MODE_GPIO,
+	.gpio23 = GPIO_MODE_GPIO,
+	.gpio24 = GPIO_MODE_GPIO,
+	.gpio27 = GPIO_MODE_GPIO,
+	.gpio28 = GPIO_MODE_GPIO,
+	.gpio29 = GPIO_MODE_GPIO,
+	.gpio31 = GPIO_MODE_GPIO,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_direction = {
+	.gpio1  = GPIO_DIR_INPUT,
+	.gpio2  = GPIO_DIR_INPUT,
+	.gpio3  = GPIO_DIR_INPUT,
+	.gpio4  = GPIO_DIR_INPUT,
+	.gpio5  = GPIO_DIR_INPUT,
+	.gpio6  = GPIO_DIR_INPUT,
+	.gpio7  = GPIO_DIR_INPUT,
+	.gpio8  = GPIO_DIR_INPUT,
+	.gpio9  = GPIO_DIR_OUTPUT,
+	.gpio13 = GPIO_DIR_INPUT,
+	.gpio17 = GPIO_DIR_INPUT,
+	.gpio18 = GPIO_DIR_OUTPUT,
+	.gpio19 = GPIO_DIR_INPUT,
+	.gpio20 = GPIO_DIR_OUTPUT,
+	.gpio21 = GPIO_DIR_INPUT,
+	.gpio22 = GPIO_DIR_INPUT,
+	.gpio23 = GPIO_DIR_INPUT,
+	.gpio24 = GPIO_DIR_OUTPUT,
+	.gpio27 = GPIO_DIR_OUTPUT,
+	.gpio28 = GPIO_DIR_OUTPUT,
+	.gpio29 = GPIO_DIR_INPUT,
+	.gpio31 = GPIO_DIR_INPUT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_level = {
+	.gpio9  = GPIO_LEVEL_HIGH,
+	.gpio18 = GPIO_LEVEL_HIGH,
+	.gpio20 = GPIO_LEVEL_HIGH,
+	.gpio24 = GPIO_LEVEL_HIGH,
+	.gpio27 = GPIO_LEVEL_LOW,
+	.gpio28 = GPIO_LEVEL_LOW,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_invert = {
+	.gpio1 = GPIO_INVERT,
+	.gpio8 = GPIO_INVERT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_blink = {
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_mode = {
+	.gpio33 = GPIO_MODE_GPIO,
+	.gpio34 = GPIO_MODE_GPIO,
+	.gpio36 = GPIO_MODE_GPIO,
+	.gpio37 = GPIO_MODE_GPIO,
+	.gpio38 = GPIO_MODE_GPIO,
+	.gpio39 = GPIO_MODE_GPIO,
+	.gpio41 = GPIO_MODE_GPIO,
+	.gpio42 = GPIO_MODE_GPIO,
+	.gpio43 = GPIO_MODE_GPIO,
+	.gpio44 = GPIO_MODE_GPIO,
+	.gpio45 = GPIO_MODE_GPIO,
+	.gpio46 = GPIO_MODE_GPIO,
+	.gpio47 = GPIO_MODE_GPIO,
+	.gpio48 = GPIO_MODE_GPIO,
+	.gpio49 = GPIO_MODE_GPIO,
+	.gpio50 = GPIO_MODE_GPIO,
+	.gpio51 = GPIO_MODE_GPIO,
+	.gpio52 = GPIO_MODE_GPIO,
+	.gpio53 = GPIO_MODE_GPIO,
+	.gpio54 = GPIO_MODE_GPIO,
+	.gpio55 = GPIO_MODE_GPIO,
+	.gpio56 = GPIO_MODE_GPIO,
+	.gpio57 = GPIO_MODE_GPIO,
+	.gpio60 = GPIO_MODE_GPIO,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_direction = {
+	.gpio33 = GPIO_DIR_OUTPUT,
+	.gpio34 = GPIO_DIR_OUTPUT,
+	.gpio36 = GPIO_DIR_INPUT,
+	.gpio37 = GPIO_DIR_INPUT,
+	.gpio38 = GPIO_DIR_INPUT,
+	.gpio39 = GPIO_DIR_INPUT,
+	.gpio41 = GPIO_DIR_INPUT,
+	.gpio42 = GPIO_DIR_OUTPUT,
+	.gpio43 = GPIO_DIR_INPUT,
+	.gpio44 = GPIO_DIR_INPUT,
+	.gpio45 = GPIO_DIR_INPUT,
+	.gpio46 = GPIO_DIR_INPUT,
+	.gpio47 = GPIO_DIR_INPUT,
+	.gpio48 = GPIO_DIR_INPUT,
+	.gpio49 = GPIO_DIR_OUTPUT,
+	.gpio50 = GPIO_DIR_INPUT,
+	.gpio51 = GPIO_DIR_OUTPUT,
+	.gpio52 = GPIO_DIR_INPUT,
+	.gpio53 = GPIO_DIR_OUTPUT,
+	.gpio54 = GPIO_DIR_INPUT,
+	.gpio55 = GPIO_DIR_OUTPUT,
+	.gpio56 = GPIO_DIR_INPUT,
+	.gpio57 = GPIO_DIR_INPUT,
+	.gpio60 = GPIO_DIR_INPUT,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_level = {
+	.gpio33 = GPIO_LEVEL_HIGH,
+	.gpio34 = GPIO_LEVEL_LOW,
+	.gpio42 = GPIO_LEVEL_HIGH,
+	.gpio49 = GPIO_LEVEL_HIGH,
+	.gpio51 = GPIO_LEVEL_HIGH,
+	.gpio53 = GPIO_LEVEL_HIGH,
+	.gpio55 = GPIO_LEVEL_HIGH,
+};
+
+const struct pch_gpio_map mainboard_gpio_map = {
+	.set1 = {
+		.mode      = &pch_gpio_set1_mode,
+		.direction = &pch_gpio_set1_direction,
+		.level     = &pch_gpio_set1_level,
+		.blink     = &pch_gpio_set1_blink,
+		.invert    = &pch_gpio_set1_invert,
+	},
+	.set2 = {
+		.mode      = &pch_gpio_set2_mode,
+		.direction = &pch_gpio_set2_direction,
+		.level     = &pch_gpio_set2_level,
+	},
+};
diff --git a/src/mainboard/lenovo/x200/variants/x301/overridetree.cb b/src/mainboard/lenovo/x200/variants/x301/overridetree.cb
new file mode 100644
index 0000000000..fafe5e9337
--- /dev/null
+++ b/src/mainboard/lenovo/x200/variants/x301/overridetree.cb
@@ -0,0 +1,14 @@
+chip northbridge/intel/gm45
+	device domain 0 on
+		chip southbridge/intel/i82801ix
+			# Enable PCIe ports 1,2,3 as slots (Mini * PCIe).
+			register "pcie_slot_implemented"	= "0x7"
+			# Set power limits to 10 * 10^0 watts.
+			# Maybe we should set less for Mini PCIe.
+			register "pcie_power_limits" = "{ { 10, 0 }, { 10, 0 }, { 10, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } }"
+			# x301 has no Express Card slot.
+			register "pcie_hotplug_map" = "{ 0, 0, 0, 0, 0, 0, 0, 0 }"
+			device pci 1c.3 off end # PCIe Port #4
+		end
+	end
+end
diff --git a/src/southbridge/intel/i82801ix/nvs.h b/src/southbridge/intel/i82801ix/nvs.h
index 04e62db809..fab74ddcb7 100644
--- a/src/southbridge/intel/i82801ix/nvs.h
+++ b/src/southbridge/intel/i82801ix/nvs.h
@@ -13,6 +13,10 @@
  * GNU General Public License for more details.
  */
 
+#ifndef SOUTHBRIDGE_INTEL_I82801IX_NVS_H
+#define SOUTHBRIDGE_INTEL_I82801IX_NVS_H
+#include <stdint.h>
+
 typedef struct {
 	/* Miscellaneous */
 	u16	osys; /* 0x00 - Operating System */
@@ -133,3 +137,5 @@ typedef struct {
 } __packed global_nvs_t;
 
 void acpi_create_gnvs(global_nvs_t *gnvs);
+
+#endif /* SOUTHBRIDGE_INTEL_I82801IX_NVS_H */