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 - http://www.ti.com 6 * 7 * Authors: Felipe Balbi <balbi@ti.com>, 8 */ 9 10 #include <linux/platform_device.h> 11 12 #include "core.h" 13 14 static int dwc3_host_get_irq(struct dwc3 *dwc) 15 { 16 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); 17 int irq; 18 19 irq = platform_get_irq_byname_optional(dwc3_pdev, "host"); 20 if (irq > 0) 21 goto out; 22 23 if (irq == -EPROBE_DEFER) 24 goto out; 25 26 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3"); 27 if (irq > 0) 28 goto out; 29 30 if (irq == -EPROBE_DEFER) 31 goto out; 32 33 irq = platform_get_irq(dwc3_pdev, 0); 34 if (irq > 0) 35 goto out; 36 37 if (!irq) 38 irq = -EINVAL; 39 40 out: 41 return irq; 42 } 43 44 int dwc3_host_init(struct dwc3 *dwc) 45 { 46 struct property_entry props[4]; 47 struct platform_device *xhci; 48 int ret, irq; 49 struct resource *res; 50 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); 51 int prop_idx = 0; 52 53 irq = dwc3_host_get_irq(dwc); 54 if (irq < 0) 55 return irq; 56 57 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host"); 58 if (!res) 59 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, 60 "dwc_usb3"); 61 if (!res) 62 res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0); 63 if (!res) 64 return -ENOMEM; 65 66 dwc->xhci_resources[1].start = irq; 67 dwc->xhci_resources[1].end = irq; 68 dwc->xhci_resources[1].flags = res->flags; 69 dwc->xhci_resources[1].name = res->name; 70 71 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); 72 if (!xhci) { 73 dev_err(dwc->dev, "couldn't allocate xHCI device\n"); 74 return -ENOMEM; 75 } 76 77 xhci->dev.parent = dwc->dev; 78 79 dwc->xhci = xhci; 80 81 ret = platform_device_add_resources(xhci, dwc->xhci_resources, 82 DWC3_XHCI_RESOURCES_NUM); 83 if (ret) { 84 dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); 85 goto err; 86 } 87 88 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); 89 90 if (dwc->usb3_lpm_capable) 91 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable"); 92 93 if (dwc->usb2_lpm_disable) 94 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable"); 95 96 /** 97 * WORKAROUND: dwc3 revisions <=3.00a have a limitation 98 * where Port Disable command doesn't work. 99 * 100 * The suggested workaround is that we avoid Port Disable 101 * completely. 102 * 103 * This following flag tells XHCI to do just that. 104 */ 105 if (dwc->revision <= DWC3_REVISION_300A) 106 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped"); 107 108 if (prop_idx) { 109 ret = platform_device_add_properties(xhci, props); 110 if (ret) { 111 dev_err(dwc->dev, "failed to add properties to xHCI\n"); 112 goto err; 113 } 114 } 115 116 ret = platform_device_add(xhci); 117 if (ret) { 118 dev_err(dwc->dev, "failed to register xHCI device\n"); 119 goto err; 120 } 121 122 return 0; 123 err: 124 platform_device_put(xhci); 125 return ret; 126 } 127 128 void dwc3_host_exit(struct dwc3 *dwc) 129 { 130 platform_device_unregister(dwc->xhci); 131 } 132