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(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(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 != -EPROBE_DEFER) 38 dev_err(dwc->dev, "missing host IRQ\n"); 39 40 if (!irq) 41 irq = -EINVAL; 42 43 out: 44 return irq; 45 } 46 47 int dwc3_host_init(struct dwc3 *dwc) 48 { 49 struct property_entry props[4]; 50 struct platform_device *xhci; 51 int ret, irq; 52 struct resource *res; 53 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); 54 int prop_idx = 0; 55 56 irq = dwc3_host_get_irq(dwc); 57 if (irq < 0) 58 return irq; 59 60 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host"); 61 if (!res) 62 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, 63 "dwc_usb3"); 64 if (!res) 65 res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0); 66 if (!res) 67 return -ENOMEM; 68 69 dwc->xhci_resources[1].start = irq; 70 dwc->xhci_resources[1].end = irq; 71 dwc->xhci_resources[1].flags = res->flags; 72 dwc->xhci_resources[1].name = res->name; 73 74 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); 75 if (!xhci) { 76 dev_err(dwc->dev, "couldn't allocate xHCI device\n"); 77 return -ENOMEM; 78 } 79 80 xhci->dev.parent = dwc->dev; 81 82 dwc->xhci = xhci; 83 84 ret = platform_device_add_resources(xhci, dwc->xhci_resources, 85 DWC3_XHCI_RESOURCES_NUM); 86 if (ret) { 87 dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); 88 goto err1; 89 } 90 91 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); 92 93 if (dwc->usb3_lpm_capable) 94 props[prop_idx++].name = "usb3-lpm-capable"; 95 96 if (dwc->usb2_lpm_disable) 97 props[prop_idx++].name = "usb2-lpm-disable"; 98 99 /** 100 * WORKAROUND: dwc3 revisions <=3.00a have a limitation 101 * where Port Disable command doesn't work. 102 * 103 * The suggested workaround is that we avoid Port Disable 104 * completely. 105 * 106 * This following flag tells XHCI to do just that. 107 */ 108 if (dwc->revision <= DWC3_REVISION_300A) 109 props[prop_idx++].name = "quirk-broken-port-ped"; 110 111 if (prop_idx) { 112 ret = platform_device_add_properties(xhci, props); 113 if (ret) { 114 dev_err(dwc->dev, "failed to add properties to xHCI\n"); 115 goto err1; 116 } 117 } 118 119 phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy", 120 dev_name(dwc->dev)); 121 phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy", 122 dev_name(dwc->dev)); 123 124 ret = platform_device_add(xhci); 125 if (ret) { 126 dev_err(dwc->dev, "failed to register xHCI device\n"); 127 goto err2; 128 } 129 130 return 0; 131 err2: 132 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", 133 dev_name(dwc->dev)); 134 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", 135 dev_name(dwc->dev)); 136 err1: 137 platform_device_put(xhci); 138 return ret; 139 } 140 141 void dwc3_host_exit(struct dwc3 *dwc) 142 { 143 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", 144 dev_name(dwc->dev)); 145 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", 146 dev_name(dwc->dev)); 147 platform_device_unregister(dwc->xhci); 148 } 149