v4.19.13 snapshot.
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
new file mode 100644
index 0000000..1a3878a
--- /dev/null
+++ b/drivers/usb/dwc3/host.c
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * host.c - DesignWare USB3 DRD Controller Host Glue
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Authors: Felipe Balbi <balbi@ti.com>,
+ */
+
+#include <linux/platform_device.h>
+
+#include "core.h"
+
+static int dwc3_host_get_irq(struct dwc3 *dwc)
+{
+ struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
+ int irq;
+
+ irq = platform_get_irq_byname(dwc3_pdev, "host");
+ if (irq > 0)
+ goto out;
+
+ if (irq == -EPROBE_DEFER)
+ goto out;
+
+ irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
+ if (irq > 0)
+ goto out;
+
+ if (irq == -EPROBE_DEFER)
+ goto out;
+
+ irq = platform_get_irq(dwc3_pdev, 0);
+ if (irq > 0)
+ goto out;
+
+ if (irq != -EPROBE_DEFER)
+ dev_err(dwc->dev, "missing host IRQ\n");
+
+ if (!irq)
+ irq = -EINVAL;
+
+out:
+ return irq;
+}
+
+int dwc3_host_init(struct dwc3 *dwc)
+{
+ struct property_entry props[3];
+ struct platform_device *xhci;
+ int ret, irq;
+ struct resource *res;
+ struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
+ int prop_idx = 0;
+
+ irq = dwc3_host_get_irq(dwc);
+ if (irq < 0)
+ return irq;
+
+ res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
+ if (!res)
+ res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
+ "dwc_usb3");
+ if (!res)
+ res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
+ if (!res)
+ return -ENOMEM;
+
+ dwc->xhci_resources[1].start = irq;
+ dwc->xhci_resources[1].end = irq;
+ dwc->xhci_resources[1].flags = res->flags;
+ dwc->xhci_resources[1].name = res->name;
+
+ xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
+ if (!xhci) {
+ dev_err(dwc->dev, "couldn't allocate xHCI device\n");
+ return -ENOMEM;
+ }
+
+ xhci->dev.parent = dwc->dev;
+
+ dwc->xhci = xhci;
+
+ ret = platform_device_add_resources(xhci, dwc->xhci_resources,
+ DWC3_XHCI_RESOURCES_NUM);
+ if (ret) {
+ dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
+ goto err1;
+ }
+
+ memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
+
+ if (dwc->usb3_lpm_capable)
+ props[prop_idx++].name = "usb3-lpm-capable";
+
+ /**
+ * WORKAROUND: dwc3 revisions <=3.00a have a limitation
+ * where Port Disable command doesn't work.
+ *
+ * The suggested workaround is that we avoid Port Disable
+ * completely.
+ *
+ * This following flag tells XHCI to do just that.
+ */
+ if (dwc->revision <= DWC3_REVISION_300A)
+ props[prop_idx++].name = "quirk-broken-port-ped";
+
+ if (prop_idx) {
+ ret = platform_device_add_properties(xhci, props);
+ if (ret) {
+ dev_err(dwc->dev, "failed to add properties to xHCI\n");
+ goto err1;
+ }
+ }
+
+ phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
+ dev_name(dwc->dev));
+ phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
+ dev_name(dwc->dev));
+
+ ret = platform_device_add(xhci);
+ if (ret) {
+ dev_err(dwc->dev, "failed to register xHCI device\n");
+ goto err2;
+ }
+
+ return 0;
+err2:
+ phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
+ dev_name(dwc->dev));
+ phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
+ dev_name(dwc->dev));
+err1:
+ platform_device_put(xhci);
+ return ret;
+}
+
+void dwc3_host_exit(struct dwc3 *dwc)
+{
+ phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
+ dev_name(dwc->dev));
+ phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
+ dev_name(dwc->dev));
+ platform_device_unregister(dwc->xhci);
+}