1 /** 2 * host.c - DesignWare USB3 DRD Controller Host Glue 3 * 4 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com 5 * 6 * Authors: Felipe Balbi <balbi@ti.com>, 7 * 8 * This program is free software: you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 of 10 * the License as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 */ 17 18 #include <linux/platform_device.h> 19 20 #include "core.h" 21 22 int dwc3_host_init(struct dwc3 *dwc) 23 { 24 struct property_entry props[2]; 25 struct platform_device *xhci; 26 int ret, irq; 27 struct resource *res; 28 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); 29 30 irq = platform_get_irq_byname(dwc3_pdev, "host"); 31 if (irq == -EPROBE_DEFER) 32 return irq; 33 34 if (irq <= 0) { 35 irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3"); 36 if (irq == -EPROBE_DEFER) 37 return irq; 38 39 if (irq <= 0) { 40 irq = platform_get_irq(dwc3_pdev, 0); 41 if (irq <= 0) { 42 if (irq != -EPROBE_DEFER) { 43 dev_err(dwc->dev, 44 "missing host IRQ\n"); 45 } 46 if (!irq) 47 irq = -EINVAL; 48 return irq; 49 } else { 50 res = platform_get_resource(dwc3_pdev, 51 IORESOURCE_IRQ, 0); 52 } 53 } else { 54 res = platform_get_resource_byname(dwc3_pdev, 55 IORESOURCE_IRQ, 56 "dwc_usb3"); 57 } 58 59 } else { 60 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, 61 "host"); 62 } 63 64 dwc->xhci_resources[1].start = irq; 65 dwc->xhci_resources[1].end = irq; 66 dwc->xhci_resources[1].flags = res->flags; 67 dwc->xhci_resources[1].name = res->name; 68 69 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); 70 if (!xhci) { 71 dev_err(dwc->dev, "couldn't allocate xHCI device\n"); 72 return -ENOMEM; 73 } 74 75 dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask); 76 77 xhci->dev.parent = dwc->dev; 78 xhci->dev.dma_mask = dwc->dev->dma_mask; 79 xhci->dev.dma_parms = dwc->dev->dma_parms; 80 81 dwc->xhci = xhci; 82 83 ret = platform_device_add_resources(xhci, dwc->xhci_resources, 84 DWC3_XHCI_RESOURCES_NUM); 85 if (ret) { 86 dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); 87 goto err1; 88 } 89 90 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); 91 92 if (dwc->usb3_lpm_capable) { 93 props[0].name = "usb3-lpm-capable"; 94 ret = platform_device_add_properties(xhci, props); 95 if (ret) { 96 dev_err(dwc->dev, "failed to add properties to xHCI\n"); 97 goto err1; 98 } 99 } 100 101 phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy", 102 dev_name(&xhci->dev)); 103 phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy", 104 dev_name(&xhci->dev)); 105 106 ret = platform_device_add(xhci); 107 if (ret) { 108 dev_err(dwc->dev, "failed to register xHCI device\n"); 109 goto err2; 110 } 111 112 return 0; 113 err2: 114 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", 115 dev_name(&xhci->dev)); 116 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", 117 dev_name(&xhci->dev)); 118 err1: 119 platform_device_put(xhci); 120 return ret; 121 } 122 123 void dwc3_host_exit(struct dwc3 *dwc) 124 { 125 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", 126 dev_name(&dwc->xhci->dev)); 127 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", 128 dev_name(&dwc->xhci->dev)); 129 platform_device_unregister(dwc->xhci); 130 } 131