// SPDX-License-Identifier: GPL-2.0 /* * host.c - DesignWare USB3 DRD Controller Host Glue * * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com * * Authors: Felipe Balbi <balbi@ti.com>, */ #include <linux/acpi.h> #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_optional(dwc3_pdev, "host"); if (irq > 0) goto out; if (irq == -EPROBE_DEFER) goto out; irq = platform_get_irq_byname_optional(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) irq = -EINVAL; out: return irq; } int dwc3_host_init(struct dwc3 *dwc) { struct property_entry props[4]; 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; ACPI_COMPANION_SET(&xhci->dev, ACPI_COMPANION(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 err; } memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); if (dwc->usb3_lpm_capable) props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable"); if (dwc->usb2_lpm_disable) props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable"); /** * 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 (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A)) props[prop_idx++] = PROPERTY_ENTRY_BOOL("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 err; } } ret = platform_device_add(xhci); if (ret) { dev_err(dwc->dev, "failed to register xHCI device\n"); goto err; } return 0; err: platform_device_put(xhci); return ret; } void dwc3_host_exit(struct dwc3 *dwc) { platform_device_unregister(dwc->xhci); }