mb/google/dedede/var/metaknight: Update LTE USB port configuration

Update LTE USB port configuration at run-time after probing the firmware
config. By default the concerned USB port takes the Type-A port
configuration.

BUG=b:186380807
BRANCH=dedede
TEST=Build and boot to OS in metaknight

Change-Id: I5ad5a1670adef54075923cf912fb41a1ce776155
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52960
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Wu <david_wu@quanta.corp-partner.google.com>
Reviewed-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Raymond Wong <wongraymond@google.com>

src/mainboard/google/dedede/variants/metaknight/Makefile.inc

@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 ramstage-y += gpio.c
+ramstage-y += ramstage.c
 
 smm-y += variant.c

src/mainboard/google/dedede/variants/metaknight/overridetree.cb

@@ -69,23 +69,12 @@ chip soc/intel/jasperlake
 			chip drivers/usb/acpi
 				device usb 0.0 on
 					chip drivers/usb/acpi
-						register "desc" = ""LTE""
+						register "desc" = ""Multi-use Port""
-						register "type" = "UPC_TYPE_INTERNAL"
-						register "has_power_resource" = "1"
-						register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_H17)"
-						register "reset_off_delay_ms" = "10"
-						register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A10)"
-						register "enable_delay_ms" = "20"
-						device usb 2.3 on
-							probe DB_PORTS DB_PORTS_LTE_HDMI
-						end
-					end
-					chip drivers/usb/acpi
-						register "desc" = ""Right Type-A Port""
 						register "type" = "UPC_TYPE_A"
 						register "group" = "ACPI_PLD_GROUP(2, 2)"
 						device usb 2.3 on
 							probe DB_PORTS DB_PORTS_1A_HDMI
+							probe DB_PORTS DB_PORTS_LTE_HDMI
 						end
 					end
 					chip drivers/usb/acpi
@@ -99,18 +88,12 @@ chip soc/intel/jasperlake
 						device usb 2.6 on end
 					end
 					chip drivers/usb/acpi
-						register "desc" = ""LTE""
+						register "desc" = ""Multi-use Port""
-						register "type" = "UPC_TYPE_INTERNAL"
-						device usb 3.3 on
-							probe DB_PORTS DB_PORTS_LTE_HDMI
-						end
-					end
-					chip drivers/usb/acpi
-						register "desc" = ""Right Type-A Port""
 						register "type" = "UPC_TYPE_USB3_A"
 						register "group" = "ACPI_PLD_GROUP(2, 2)"
 						device usb 3.3 on
 							probe DB_PORTS DB_PORTS_1A_HDMI
+							probe DB_PORTS DB_PORTS_LTE_HDMI
 						end
 					end
 				end

src/mainboard/google/dedede/variants/metaknight/ramstage.c

@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <acpi/acpi_device.h>
+#include <baseboard/variants.h>
+#include <console/console.h>
+#include <drivers/usb/acpi/chip.h>
+#include <fw_config.h>
+#include <gpio.h>
+#include <soc/pci_devs.h>
+
+#define LTE_USB_PORT_ID 3
+#define LTE_USB_PORT_TYPE 2
+static struct acpi_gpio lte_reset_gpio = ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_H17);
+static struct acpi_gpio lte_enable_gpio = ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A10);
+
+static void update_xhci_devtree(void)
+{
+	struct device *xhci, *hub = NULL, *port = NULL;
+	struct drivers_usb_acpi_config *config;
+
+	xhci = pcidev_path_on_root(PCH_DEVFN_XHCI);
+	if (!xhci) {
+		printk(BIOS_ERR, "%s: Could not locate XHCI device in DT\n", __func__);
+		return;
+	}
+
+	while ((hub = dev_bus_each_child(xhci->link_list, hub)) != NULL) {
+		while ((port = dev_bus_each_child(hub->link_list, port)) != NULL) {
+			if (!port->chip_info || port->path.usb.port_id != LTE_USB_PORT_ID)
+				continue;
+
+			if (!fw_config_probe(FW_CONFIG(DB_PORTS, DB_PORTS_LTE_HDMI)))
+				continue;
+
+			config = port->chip_info;
+			config->type = UPC_TYPE_INTERNAL;
+			if (port->path.usb.port_type == LTE_USB_PORT_TYPE) {
+				config->has_power_resource = 1;
+				memcpy(&config->reset_gpio, &lte_reset_gpio,
+								sizeof(config->reset_gpio));
+				config->reset_off_delay_ms = 10;
+				memcpy(&config->enable_gpio, &lte_enable_gpio,
+								sizeof(config->enable_gpio));
+				config->enable_delay_ms = 20;
+			}
+		}
+	}
+}
+
+void variant_devtree_update(void)
+{
+	update_xhci_devtree();
+}