| // 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); |
| dwc->xhci = NULL; |
| } |