1 // SPDX-License-Identifier: GPL-2.0
3 * host.c - DesignWare USB3 DRD Controller Host Glue
5 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com
7 * Authors: Felipe Balbi <balbi@ti.com>,
10 #include <linux/irq.h>
12 #include <linux/platform_device.h>
16 static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc,
19 struct platform_device *pdev = to_platform_device(dwc->dev);
20 struct device_node *np = dev_of_node(&pdev->dev);
22 dwc->xhci_resources[1].start = irq;
23 dwc->xhci_resources[1].end = irq;
24 dwc->xhci_resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(irq);
26 dwc->xhci_resources[1].name = of_node_full_name(pdev->dev.of_node);
28 dwc->xhci_resources[1].name = name;
31 static int dwc3_host_get_irq(struct dwc3 *dwc)
33 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
36 irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
38 dwc3_host_fill_xhci_irq_res(dwc, irq, "host");
42 if (irq == -EPROBE_DEFER)
45 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
47 dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3");
51 if (irq == -EPROBE_DEFER)
54 irq = platform_get_irq(dwc3_pdev, 0);
56 dwc3_host_fill_xhci_irq_res(dwc, irq, NULL);
67 int dwc3_host_init(struct dwc3 *dwc)
69 struct property_entry props[4];
70 struct platform_device *xhci;
74 irq = dwc3_host_get_irq(dwc);
78 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
80 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
84 xhci->dev.parent = dwc->dev;
88 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
89 DWC3_XHCI_RESOURCES_NUM);
91 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
95 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
97 if (dwc->usb3_lpm_capable)
98 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
100 if (dwc->usb2_lpm_disable)
101 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
104 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
105 * where Port Disable command doesn't work.
107 * The suggested workaround is that we avoid Port Disable
110 * This following flag tells XHCI to do just that.
112 if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A))
113 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
116 ret = device_create_managed_software_node(&xhci->dev, props, NULL);
118 dev_err(dwc->dev, "failed to add properties to xHCI\n");
123 ret = platform_device_add(xhci);
125 dev_err(dwc->dev, "failed to register xHCI device\n");
131 platform_device_put(xhci);
135 void dwc3_host_exit(struct dwc3 *dwc)
137 platform_device_unregister(dwc->xhci);