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/acpi.h>
11 #include <linux/platform_device.h>
12 #include <linux/usb.h>
13 #include <linux/usb/hcd.h>
15 #include "../host/xhci-plat.h"
18 static void dwc3_xhci_plat_start(struct usb_hcd *hcd)
20 struct platform_device *pdev;
23 if (!usb_hcd_is_primary_hcd(hcd))
26 pdev = to_platform_device(hcd->self.controller);
27 dwc = dev_get_drvdata(pdev->dev.parent);
29 dwc3_enable_susphy(dwc, true);
32 static const struct xhci_plat_priv dwc3_xhci_plat_quirk = {
33 .plat_start = dwc3_xhci_plat_start,
36 static int dwc3_host_get_irq(struct dwc3 *dwc)
38 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
41 irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
45 if (irq == -EPROBE_DEFER)
48 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
52 if (irq == -EPROBE_DEFER)
55 irq = platform_get_irq(dwc3_pdev, 0);
66 int dwc3_host_init(struct dwc3 *dwc)
68 struct property_entry props[4];
69 struct platform_device *xhci;
72 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
75 irq = dwc3_host_get_irq(dwc);
79 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
81 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
84 res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
88 dwc->xhci_resources[1].start = irq;
89 dwc->xhci_resources[1].end = irq;
90 dwc->xhci_resources[1].flags = res->flags;
91 dwc->xhci_resources[1].name = res->name;
93 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
95 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
99 xhci->dev.parent = dwc->dev;
100 ACPI_COMPANION_SET(&xhci->dev, ACPI_COMPANION(dwc->dev));
104 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
105 DWC3_XHCI_RESOURCES_NUM);
107 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
111 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
113 if (dwc->usb3_lpm_capable)
114 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
116 if (dwc->usb2_lpm_disable)
117 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
120 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
121 * where Port Disable command doesn't work.
123 * The suggested workaround is that we avoid Port Disable
126 * This following flag tells XHCI to do just that.
128 if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A))
129 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
132 ret = platform_device_add_properties(xhci, props);
134 dev_err(dwc->dev, "failed to add properties to xHCI\n");
139 ret = platform_device_add_data(xhci, &dwc3_xhci_plat_quirk,
140 sizeof(struct xhci_plat_priv));
144 ret = platform_device_add(xhci);
146 dev_err(dwc->dev, "failed to register xHCI device\n");
152 platform_device_put(xhci);
156 void dwc3_host_exit(struct dwc3 *dwc)
158 dwc3_enable_susphy(dwc, false);
159 platform_device_unregister(dwc->xhci);