mb/dell: Add Latitude E5420 (Sandy Bridge)

Mainboard is Krug 14". I do not physically have this system; someone
with physical access to one sent me the output of autoport which I then
modified to produce this port. I was also sent the VBT binary, which was
obtained from `/sys/kernel/debug/dri/0/i915_vbt` while running version
A02 of the vendor firmware.

This was originally tested and found to be working as a standalone board
port in Libreboot, but this variant based port in upstream coreboot has
not been tested.

This can be internally flashed by sending a command to the EC, which
causes the EC to pull the FDO pin low and the firmware to skip setting
up any chipset based write protections [1]. The EC is the SMSC MEC5055,
which seems to be compatible with the existing MEC5035 code.

[1] https://gitlab.com/nic3-14159/dell-flash-unlock

Change-Id: I0283653156083768e1fd451bcf539b4e028589f4
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82129
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>

7 files changed, 292 insertions, 1 deletions

diff --git a/src/mainboard/dell/snb_ivb_latitude/Kconfig b/src/mainboard/dell/snb_ivb_latitude/Kconfig
index 4e94a7ef80..e6a21ffb99 100644
--- a/src/mainboard/dell/snb_ivb_latitude/Kconfig
+++ b/src/mainboard/dell/snb_ivb_latitude/Kconfig
@@ -17,6 +17,11 @@ config BOARD_DELL_SNB_IVB_LATITUDE_COMMON
 	select SYSTEM_TYPE_LAPTOP
 	select USE_NATIVE_RAMINIT
 
+config BOARD_DELL_LATITUDE_E5420
+	select BOARD_DELL_SNB_IVB_LATITUDE_COMMON
+	select BOARD_ROMSIZE_KB_6144
+	select SOUTHBRIDGE_INTEL_BD82X6X
+
 config BOARD_DELL_LATITUDE_E5520
 	select BOARD_DELL_SNB_IVB_LATITUDE_COMMON
 	select BOARD_ROMSIZE_KB_6144
@@ -60,6 +65,7 @@ config MAINBOARD_DIR
 	default "dell/snb_ivb_latitude"
 
 config MAINBOARD_PART_NUMBER
+	default "Latitude E5420" if BOARD_DELL_LATITUDE_E5420
 	default "Latitude E5520" if BOARD_DELL_LATITUDE_E5520
 	default "Latitude E6420" if BOARD_DELL_LATITUDE_E6420
 	default "Latitude E6520" if BOARD_DELL_LATITUDE_E6520
@@ -74,6 +80,7 @@ config USBDEBUG_HCD_INDEX
 	default 2
 
 config VARIANT_DIR
+	default "e5420" if BOARD_DELL_LATITUDE_E5420
 	default "e5520" if BOARD_DELL_LATITUDE_E5520
 	default "e6420" if BOARD_DELL_LATITUDE_E6420
 	default "e6520" if BOARD_DELL_LATITUDE_E6520
@@ -82,7 +89,8 @@ config VARIANT_DIR
 	default "e6530" if BOARD_DELL_LATITUDE_E6530
 
 config VGA_BIOS_ID
-	default "8086,0116" if BOARD_DELL_LATITUDE_E6520
+	default "8086,0116" if BOARD_DELL_LATITUDE_E6520 \
+		|| BOARD_DELL_LATITUDE_E5420
 	default "8086,0166" if BOARD_DELL_LATITUDE_E5530
 	default "8086,0126" if BOARD_DELL_LATITUDE_E6420 \
 		|| BOARD_DELL_LATITUDE_E5520
diff --git a/src/mainboard/dell/snb_ivb_latitude/Kconfig.name b/src/mainboard/dell/snb_ivb_latitude/Kconfig.name
index 7976691f21..a3fa2b1837 100644
--- a/src/mainboard/dell/snb_ivb_latitude/Kconfig.name
+++ b/src/mainboard/dell/snb_ivb_latitude/Kconfig.name
@@ -1,5 +1,8 @@
 ## SPDX-License-Identifier: GPL-2.0-only
 
+config BOARD_DELL_LATITUDE_E5420
+	bool "Latitude E5420"
+
 config BOARD_DELL_LATITUDE_E5520
 	bool "Latitude E5520"
 
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e5420/data.vbt b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/data.vbt
new file mode 100644
index 0000000000..98b82fe611
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/data.vbt
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e5420/early_init.c b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/early_init.c
new file mode 100644
index 0000000000..ff83db095b
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/early_init.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootblock_common.h>
+#include <device/pci_ops.h>
+#include <ec/dell/mec5035/mec5035.h>
+#include <southbridge/intel/bd82x6x/pch.h>
+
+void bootblock_mainboard_early_init(void)
+{
+	pci_write_config16(PCH_LPC_DEV, LPC_EN, CNF1_LPC_EN | MC_LPC_EN
+			| KBC_LPC_EN | FDD_LPC_EN | LPT_LPC_EN
+			| COMB_LPC_EN | COMA_LPC_EN);
+	mec5035_early_init();
+}
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e5420/gpio.c b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/gpio.c
new file mode 100644
index 0000000000..f76b93d9f0
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/gpio.c
@@ -0,0 +1,195 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <southbridge/intel/common/gpio.h>
+
+static const struct pch_gpio_set1 pch_gpio_set1_mode = {
+	.gpio0 = GPIO_MODE_GPIO,
+	.gpio1 = GPIO_MODE_NATIVE,
+	.gpio2 = GPIO_MODE_GPIO,
+	.gpio3 = GPIO_MODE_GPIO,
+	.gpio4 = GPIO_MODE_GPIO,
+	.gpio5 = GPIO_MODE_NATIVE,
+	.gpio6 = GPIO_MODE_GPIO,
+	.gpio7 = GPIO_MODE_GPIO,
+	.gpio8 = GPIO_MODE_GPIO,
+	.gpio9 = GPIO_MODE_NATIVE,
+	.gpio10 = GPIO_MODE_NATIVE,
+	.gpio11 = GPIO_MODE_NATIVE,
+	.gpio12 = GPIO_MODE_GPIO,
+	.gpio13 = GPIO_MODE_GPIO,
+	.gpio14 = GPIO_MODE_GPIO,
+	.gpio15 = GPIO_MODE_GPIO,
+	.gpio16 = GPIO_MODE_NATIVE,
+	.gpio17 = GPIO_MODE_GPIO,
+	.gpio18 = GPIO_MODE_NATIVE,
+	.gpio19 = GPIO_MODE_GPIO,
+	.gpio20 = GPIO_MODE_NATIVE,
+	.gpio21 = GPIO_MODE_GPIO,
+	.gpio22 = GPIO_MODE_GPIO,
+	.gpio23 = GPIO_MODE_NATIVE,
+	.gpio24 = GPIO_MODE_GPIO,
+	.gpio25 = GPIO_MODE_NATIVE,
+	.gpio26 = GPIO_MODE_NATIVE,
+	.gpio27 = GPIO_MODE_GPIO,
+	.gpio28 = GPIO_MODE_GPIO,
+	.gpio29 = GPIO_MODE_GPIO,
+	.gpio30 = GPIO_MODE_GPIO,
+	.gpio31 = GPIO_MODE_NATIVE,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_direction = {
+	.gpio0 = GPIO_DIR_INPUT,
+	.gpio2 = GPIO_DIR_INPUT,
+	.gpio3 = GPIO_DIR_INPUT,
+	.gpio4 = GPIO_DIR_INPUT,
+	.gpio6 = GPIO_DIR_INPUT,
+	.gpio7 = GPIO_DIR_INPUT,
+	.gpio8 = GPIO_DIR_INPUT,
+	.gpio12 = GPIO_DIR_OUTPUT,
+	.gpio13 = GPIO_DIR_INPUT,
+	.gpio14 = GPIO_DIR_INPUT,
+	.gpio15 = GPIO_DIR_INPUT,
+	.gpio17 = GPIO_DIR_INPUT,
+	.gpio19 = GPIO_DIR_INPUT,
+	.gpio21 = GPIO_DIR_INPUT,
+	.gpio22 = GPIO_DIR_INPUT,
+	.gpio24 = GPIO_DIR_INPUT,
+	.gpio27 = GPIO_DIR_INPUT,
+	.gpio28 = GPIO_DIR_INPUT,
+	.gpio29 = GPIO_DIR_INPUT,
+	.gpio30 = GPIO_DIR_OUTPUT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_level = {
+	.gpio12 = GPIO_LEVEL_HIGH,
+	.gpio30 = GPIO_LEVEL_HIGH,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_reset = {
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_invert = {
+	.gpio0 = GPIO_INVERT,
+	.gpio8 = GPIO_INVERT,
+	.gpio14 = GPIO_INVERT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_blink = {
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_mode = {
+	.gpio32 = GPIO_MODE_NATIVE,
+	.gpio33 = GPIO_MODE_GPIO,
+	.gpio34 = GPIO_MODE_GPIO,
+	.gpio35 = GPIO_MODE_GPIO,
+	.gpio36 = GPIO_MODE_GPIO,
+	.gpio37 = GPIO_MODE_GPIO,
+	.gpio38 = GPIO_MODE_GPIO,
+	.gpio39 = GPIO_MODE_GPIO,
+	.gpio40 = GPIO_MODE_NATIVE,
+	.gpio41 = GPIO_MODE_NATIVE,
+	.gpio42 = GPIO_MODE_NATIVE,
+	.gpio43 = GPIO_MODE_NATIVE,
+	.gpio44 = GPIO_MODE_NATIVE,
+	.gpio45 = GPIO_MODE_NATIVE,
+	.gpio46 = GPIO_MODE_GPIO,
+	.gpio47 = GPIO_MODE_NATIVE,
+	.gpio48 = GPIO_MODE_GPIO,
+	.gpio49 = GPIO_MODE_NATIVE,
+	.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,
+	.gpio58 = GPIO_MODE_NATIVE,
+	.gpio59 = GPIO_MODE_NATIVE,
+	.gpio60 = GPIO_MODE_GPIO,
+	.gpio61 = GPIO_MODE_NATIVE,
+	.gpio62 = GPIO_MODE_NATIVE,
+	.gpio63 = GPIO_MODE_NATIVE,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_direction = {
+	.gpio33 = GPIO_DIR_INPUT,
+	.gpio34 = GPIO_DIR_OUTPUT,
+	.gpio35 = GPIO_DIR_INPUT,
+	.gpio36 = GPIO_DIR_INPUT,
+	.gpio37 = GPIO_DIR_OUTPUT,
+	.gpio38 = GPIO_DIR_INPUT,
+	.gpio39 = GPIO_DIR_INPUT,
+	.gpio46 = GPIO_DIR_OUTPUT,
+	.gpio48 = GPIO_DIR_INPUT,
+	.gpio50 = GPIO_DIR_OUTPUT,
+	.gpio51 = GPIO_DIR_OUTPUT,
+	.gpio52 = GPIO_DIR_INPUT,
+	.gpio53 = GPIO_DIR_INPUT,
+	.gpio54 = GPIO_DIR_INPUT,
+	.gpio55 = GPIO_DIR_OUTPUT,
+	.gpio56 = GPIO_DIR_INPUT,
+	.gpio57 = GPIO_DIR_INPUT,
+	.gpio60 = GPIO_DIR_OUTPUT,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_level = {
+	.gpio34 = GPIO_LEVEL_LOW,
+	.gpio37 = GPIO_LEVEL_LOW,
+	.gpio46 = GPIO_LEVEL_HIGH,
+	.gpio50 = GPIO_LEVEL_HIGH,
+	.gpio51 = GPIO_LEVEL_LOW,
+	.gpio55 = GPIO_LEVEL_LOW,
+	.gpio60 = GPIO_LEVEL_HIGH,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_reset = {
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_mode = {
+	.gpio64 = GPIO_MODE_NATIVE,
+	.gpio65 = GPIO_MODE_NATIVE,
+	.gpio66 = GPIO_MODE_NATIVE,
+	.gpio67 = GPIO_MODE_NATIVE,
+	.gpio68 = GPIO_MODE_NATIVE,
+	.gpio69 = GPIO_MODE_NATIVE,
+	.gpio70 = GPIO_MODE_NATIVE,
+	.gpio71 = GPIO_MODE_NATIVE,
+	.gpio72 = GPIO_MODE_NATIVE,
+	.gpio73 = GPIO_MODE_NATIVE,
+	.gpio74 = GPIO_MODE_GPIO,
+	.gpio75 = GPIO_MODE_NATIVE,
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_direction = {
+	.gpio74 = GPIO_DIR_INPUT,
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_level = {
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_reset = {
+};
+
+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,
+		.reset		= &pch_gpio_set1_reset,
+	},
+	.set2 = {
+		.mode		= &pch_gpio_set2_mode,
+		.direction	= &pch_gpio_set2_direction,
+		.level		= &pch_gpio_set2_level,
+		.reset		= &pch_gpio_set2_reset,
+	},
+	.set3 = {
+		.mode		= &pch_gpio_set3_mode,
+		.direction	= &pch_gpio_set3_direction,
+		.level		= &pch_gpio_set3_level,
+		.reset		= &pch_gpio_set3_reset,
+	},
+};
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e5420/hda_verb.c b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/hda_verb.c
new file mode 100644
index 0000000000..0bc6c35a63
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/hda_verb.c
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/azalia_device.h>
+
+const u32 cim_verb_data[] = {
+	0x111d76e7,	/* Codec Vendor / Device ID: IDT */
+	0x1028049b,	/* Subsystem ID */
+	11,		/* Number of 4 dword sets */
+	AZALIA_SUBVENDOR(0, 0x1028049b),
+	AZALIA_PIN_CFG(0, 0x0a, 0x04a11020),
+	AZALIA_PIN_CFG(0, 0x0b, 0x0421101f),
+	AZALIA_PIN_CFG(0, 0x0c, 0x400000f0),
+	AZALIA_PIN_CFG(0, 0x0d, 0x90170110),
+	AZALIA_PIN_CFG(0, 0x0e, 0x23011050),
+	AZALIA_PIN_CFG(0, 0x0f, 0x23a1102e),
+	AZALIA_PIN_CFG(0, 0x10, 0x400000f3),
+	AZALIA_PIN_CFG(0, 0x11, 0x400000f0),
+	AZALIA_PIN_CFG(0, 0x1f, 0x400000f0),
+	AZALIA_PIN_CFG(0, 0x20, 0xd5a30130),
+
+	0x80862805,	/* Codec Vendor / Device ID: Intel */
+	0x80860101,	/* Subsystem ID */
+	4,		/* Number of 4 dword sets */
+	AZALIA_SUBVENDOR(3, 0x80860101),
+	AZALIA_PIN_CFG(3, 0x05, 0x18560010),
+	AZALIA_PIN_CFG(3, 0x06, 0x18560020),
+	AZALIA_PIN_CFG(3, 0x07, 0x18560030),
+};
+
+const u32 pc_beep_verbs[0] = {};
+
+AZALIA_ARRAY_SIZES;
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e5420/overridetree.cb b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/overridetree.cb
new file mode 100644
index 0000000000..3f55bfd49d
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e5420/overridetree.cb
@@ -0,0 +1,39 @@
+## SPDX-License-Identifier: GPL-2.0-or-later
+
+chip northbridge/intel/sandybridge
+	device domain 0 on
+		subsystemid 0x1028 0x049b inherit
+
+		device ref igd on
+			register "gpu_cpu_backlight" = "0x00000c31"
+			register "gpu_pch_backlight" = "0x13121312"
+		end
+
+		chip southbridge/intel/bd82x6x
+			register "pcie_hotplug_map" = "{ 0, 0, 1, 0, 0, 0, 1, 0 }"
+			register "usb_port_config" = "{
+				{ 1, 1, 0 },
+				{ 1, 1, 0 },
+				{ 1, 1, 1 },
+				{ 1, 1, 1 },
+				{ 1, 1, 2 },
+				{ 1, 1, 2 },
+				{ 1, 1, 3 },
+				{ 1, 1, 3 },
+				{ 1, 1, 5 },
+				{ 1, 1, 5 },
+				{ 1, 1, 7 },
+				{ 1, 1, 6 },
+				{ 1, 1, 6 },
+				{ 1, 1, 7 },
+			}"
+
+			device ref gbe off end
+			device ref pcie_rp4 off end
+			device ref pcie_rp7 on end # Broadcom BCM5761 Gigabit Ethernet
+			device ref sata1 on
+				register "sata_port_map" = "0x3b"
+			end
+		end
+	end
+end