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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 | /** * host.c - DesignWare USB3 DRD Controller Host Glue * * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com * * Authors: Felipe Balbi <balbi@ti.com>, * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 of * the License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/platform_device.h> #include "core.h" 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 = platform_get_irq_byname(dwc3_pdev, "host"); if (irq == -EPROBE_DEFER) return irq; if (irq <= 0) { irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3"); if (irq == -EPROBE_DEFER) return irq; if (irq <= 0) { irq = platform_get_irq(dwc3_pdev, 0); if (irq <= 0) { if (irq != -EPROBE_DEFER) { dev_err(dwc->dev, "missing host IRQ\n"); } if (!irq) irq = -EINVAL; return irq; } else { res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0); } } else { res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "dwc_usb3"); } } else { res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host"); } 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; } dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask); xhci->dev.parent = dwc->dev; xhci->dev.dma_mask = dwc->dev->dma_mask; xhci->dev.dma_parms = dwc->dev->dma_parms; 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(&xhci->dev)); phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(&xhci->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(&xhci->dev)); phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(&xhci->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->xhci->dev)); phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(&dwc->xhci->dev)); platform_device_unregister(dwc->xhci); } |