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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | // SPDX-License-Identifier: GPL-2.0 /** * host.c - DesignWare USB3 DRD Controller Host Glue * * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com * * Authors: Felipe Balbi <balbi@ti.com>, */ #include <linux/platform_device.h> #include "core.h" static int dwc3_host_get_irq(struct dwc3 *dwc) { struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); int irq; irq = platform_get_irq_byname(dwc3_pdev, "host"); if (irq > 0) goto out; if (irq == -EPROBE_DEFER) goto out; irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3"); if (irq > 0) goto out; if (irq == -EPROBE_DEFER) goto out; irq = platform_get_irq(dwc3_pdev, 0); if (irq > 0) goto out; if (irq != -EPROBE_DEFER) dev_err(dwc->dev, "missing host IRQ\n"); if (!irq) irq = -EINVAL; out: return irq; } int dwc3_host_init(struct dwc3 *dwc) { struct property_entry props[3]; struct platform_device *xhci; int ret, irq; struct resource *res; struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); int prop_idx = 0; irq = dwc3_host_get_irq(dwc); if (irq < 0) return irq; res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host"); if (!res) res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "dwc_usb3"); if (!res) res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0); if (!res) return -ENOMEM; dwc->xhci_resources[1].start = irq; dwc->xhci_resources[1].end = irq; dwc->xhci_resources[1].flags = res->flags; dwc->xhci_resources[1].name = res->name; xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); if (!xhci) { dev_err(dwc->dev, "couldn't allocate xHCI device\n"); return -ENOMEM; } xhci->dev.parent = dwc->dev; dwc->xhci = xhci; ret = platform_device_add_resources(xhci, dwc->xhci_resources, DWC3_XHCI_RESOURCES_NUM); if (ret) { dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); goto err1; } memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); if (dwc->usb3_lpm_capable) props[prop_idx++].name = "usb3-lpm-capable"; /** * WORKAROUND: dwc3 revisions <=3.00a have a limitation * where Port Disable command doesn't work. * * The suggested workaround is that we avoid Port Disable * completely. * * This following flag tells XHCI to do just that. */ if (dwc->revision <= DWC3_REVISION_300A) props[prop_idx++].name = "quirk-broken-port-ped"; if (prop_idx) { ret = platform_device_add_properties(xhci, props); if (ret) { dev_err(dwc->dev, "failed to add properties to xHCI\n"); goto err1; } } phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy", dev_name(dwc->dev)); phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(dwc->dev)); ret = platform_device_add(xhci); if (ret) { dev_err(dwc->dev, "failed to register xHCI device\n"); goto err2; } return 0; err2: phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", dev_name(dwc->dev)); phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(dwc->dev)); err1: platform_device_put(xhci); return ret; } void dwc3_host_exit(struct dwc3 *dwc) { phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", dev_name(dwc->dev)); phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(dwc->dev)); platform_device_unregister(dwc->xhci); dwc->xhci = NULL; } |