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/irq.h> 11 #include <linux/of.h> 12 #include <linux/platform_device.h> 13 #include <linux/usb.h> 14 #include <linux/usb/hcd.h> 15 16 #include "../host/xhci-plat.h" 17 #include "core.h" 18 19 static void dwc3_xhci_plat_start(struct usb_hcd *hcd) 20 { 21 struct platform_device *pdev; 22 struct dwc3 *dwc; 23 24 if (!usb_hcd_is_primary_hcd(hcd)) 25 return; 26 27 pdev = to_platform_device(hcd->self.controller); 28 dwc = dev_get_drvdata(pdev->dev.parent); 29 30 dwc3_enable_susphy(dwc, true); 31 } 32 33 static const struct xhci_plat_priv dwc3_xhci_plat_quirk = { 34 .plat_start = dwc3_xhci_plat_start, 35 }; 36 37 static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc, 38 int irq, char *name) 39 { 40 struct platform_device *pdev = to_platform_device(dwc->dev); 41 struct device_node *np = dev_of_node(&pdev->dev); 42 43 dwc->xhci_resources[1].start = irq; 44 dwc->xhci_resources[1].end = irq; 45 dwc->xhci_resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(irq); 46 if (!name && np) 47 dwc->xhci_resources[1].name = of_node_full_name(pdev->dev.of_node); 48 else 49 dwc->xhci_resources[1].name = name; 50 } 51 52 static int dwc3_host_get_irq(struct dwc3 *dwc) 53 { 54 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); 55 int irq; 56 57 irq = platform_get_irq_byname_optional(dwc3_pdev, "host"); 58 if (irq > 0) { 59 dwc3_host_fill_xhci_irq_res(dwc, irq, "host"); 60 goto out; 61 } 62 63 if (irq == -EPROBE_DEFER) 64 goto out; 65 66 irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3"); 67 if (irq > 0) { 68 dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3"); 69 goto out; 70 } 71 72 if (irq == -EPROBE_DEFER) 73 goto out; 74 75 irq = platform_get_irq(dwc3_pdev, 0); 76 if (irq > 0) 77 dwc3_host_fill_xhci_irq_res(dwc, irq, NULL); 78 79 out: 80 return irq; 81 } 82 83 int dwc3_host_init(struct dwc3 *dwc) 84 { 85 struct property_entry props[5]; 86 struct platform_device *xhci; 87 int ret, irq; 88 int prop_idx = 0; 89 90 irq = dwc3_host_get_irq(dwc); 91 if (irq < 0) 92 return irq; 93 94 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); 95 if (!xhci) { 96 dev_err(dwc->dev, "couldn't allocate xHCI device\n"); 97 return -ENOMEM; 98 } 99 100 xhci->dev.parent = dwc->dev; 101 102 dwc->xhci = xhci; 103 104 ret = platform_device_add_resources(xhci, dwc->xhci_resources, 105 DWC3_XHCI_RESOURCES_NUM); 106 if (ret) { 107 dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); 108 goto err; 109 } 110 111 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); 112 113 props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-sg-trb-cache-size-quirk"); 114 115 if (dwc->usb3_lpm_capable) 116 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable"); 117 118 if (dwc->usb2_lpm_disable) 119 props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable"); 120 121 /** 122 * WORKAROUND: dwc3 revisions <=3.00a have a limitation 123 * where Port Disable command doesn't work. 124 * 125 * The suggested workaround is that we avoid Port Disable 126 * completely. 127 * 128 * This following flag tells XHCI to do just that. 129 */ 130 if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A)) 131 props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped"); 132 133 if (prop_idx) { 134 ret = device_create_managed_software_node(&xhci->dev, props, NULL); 135 if (ret) { 136 dev_err(dwc->dev, "failed to add properties to xHCI\n"); 137 goto err; 138 } 139 } 140 141 ret = platform_device_add_data(xhci, &dwc3_xhci_plat_quirk, 142 sizeof(struct xhci_plat_priv)); 143 if (ret) 144 goto err; 145 146 ret = platform_device_add(xhci); 147 if (ret) { 148 dev_err(dwc->dev, "failed to register xHCI device\n"); 149 goto err; 150 } 151 152 if (dwc->sys_wakeup) { 153 /* Restore wakeup setting if switched from device */ 154 device_wakeup_enable(dwc->sysdev); 155 156 /* Pass on wakeup setting to the new xhci platform device */ 157 device_init_wakeup(&xhci->dev, true); 158 } 159 160 return 0; 161 err: 162 platform_device_put(xhci); 163 return ret; 164 } 165 166 void dwc3_host_exit(struct dwc3 *dwc) 167 { 168 if (dwc->sys_wakeup) 169 device_init_wakeup(&dwc->xhci->dev, false); 170 171 dwc3_enable_susphy(dwc, false); 172 platform_device_unregister(dwc->xhci); 173 dwc->xhci = NULL; 174 } 175