1// SPDX-License-Identifier: GPL-2.0 2/* 3 * host.c - DesignWare USB3 DRD Controller Host Glue 4 * 5 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com 6 * 7 * Authors: Felipe Balbi <balbi@ti.com>, 8 */ 9 10#include <linux/acpi.h> 11#include <linux/platform_device.h> 12 13#include "core.h" 14 15static int dwc3_host_get_irq(struct dwc3 *dwc) 16{ 17 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); 18 int irq; 19 20 irq = platform_get_irq_byname_optional(dwc3_pdev, "host"); 21 if (irq > 0) 22 goto out; 23 24 if (irq == -EPROBE_DEFER) 25 goto out; 26 27 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3"); 28 if (irq > 0) 29 goto out; 30 31 if (irq == -EPROBE_DEFER) 32 goto out; 33 34 irq = platform_get_irq(dwc3_pdev, 0); 35 if (irq > 0) 36 goto out; 37 38 if (!irq) 39 irq = -EINVAL; 40 41out: 42 return irq; 43} 44 45int dwc3_host_init(struct dwc3 *dwc) 46{ 47 struct property_entry props[4]; 48 struct platform_device *xhci; 49 int ret, irq; 50 struct resource *res; 51 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); 52 int prop_idx = 0; 53 54 irq = dwc3_host_get_irq(dwc); 55 if (irq < 0) 56 return irq; 57 58 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host"); 59 if (!res) 60 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, 61 "dwc_usb3"); 62 if (!res) 63 res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0); 64 if (!res) 65 return -ENOMEM; 66 67 dwc->xhci_resources[1].start = irq; 68 dwc->xhci_resources[1].end = irq; 69 dwc->xhci_resources[1].flags = res->flags; 70 dwc->xhci_resources[1].name = res->name; 71 72 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); 73 if (!xhci) { 74 dev_err(dwc->dev, "couldn't allocate xHCI device\n"); 75 return -ENOMEM; 76 } 77 78 xhci->dev.parent = dwc->dev; 79 ACPI_COMPANION_SET(&xhci->dev, ACPI_COMPANION(dwc->dev)); 80 81 dwc->xhci = xhci; 82 83 ret = platform_device_add_resources(xhci, dwc->xhci_resources, 84 DWC3_XHCI_RESOURCES_NUM); 85 if (ret) { 86 dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); 87 goto err; 88 } 89 90 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); 91 92 if (dwc->usb3_lpm_capable) 93 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable"); 94 95 if (dwc->usb2_lpm_disable) 96 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable"); 97 98 /** 99 * WORKAROUND: dwc3 revisions <=3.00a have a limitation 100 * where Port Disable command doesn't work. 101 * 102 * The suggested workaround is that we avoid Port Disable 103 * completely. 104 * 105 * This following flag tells XHCI to do just that. 106 */ 107 if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A)) 108 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped"); 109 110 if (prop_idx) { 111 ret = platform_device_add_properties(xhci, props); 112 if (ret) { 113 dev_err(dwc->dev, "failed to add properties to xHCI\n"); 114 goto err; 115 } 116 } 117 118 ret = platform_device_add(xhci); 119 if (ret) { 120 dev_err(dwc->dev, "failed to register xHCI device\n"); 121 goto err; 122 } 123 124 return 0; 125err: 126 platform_device_put(xhci); 127 return ret; 128} 129 130void dwc3_host_exit(struct dwc3 *dwc) 131{ 132 platform_device_unregister(dwc->xhci); 133 dwc->xhci = NULL; 134} 135