2 * host.c - DesignWare USB3 DRD Controller Host Glue
4 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
6 * Authors: Felipe Balbi <balbi@ti.com>,
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.
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.
18 #include <linux/platform_device.h>
22 int dwc3_host_init(struct dwc3 *dwc)
24 struct property_entry props[3];
25 struct platform_device *xhci;
28 struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
31 irq = platform_get_irq_byname(dwc3_pdev, "host");
32 if (irq == -EPROBE_DEFER)
36 irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
37 if (irq == -EPROBE_DEFER)
41 irq = platform_get_irq(dwc3_pdev, 0);
43 if (irq != -EPROBE_DEFER) {
45 "missing host IRQ\n");
51 res = platform_get_resource(dwc3_pdev,
55 res = platform_get_resource_byname(dwc3_pdev,
61 res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
65 dwc->xhci_resources[1].start = irq;
66 dwc->xhci_resources[1].end = irq;
67 dwc->xhci_resources[1].flags = res->flags;
68 dwc->xhci_resources[1].name = res->name;
70 xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
72 dev_err(dwc->dev, "couldn't allocate xHCI device\n");
76 dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
78 xhci->dev.parent = dwc->dev;
79 xhci->dev.dma_mask = dwc->dev->dma_mask;
80 xhci->dev.dma_parms = dwc->dev->dma_parms;
84 ret = platform_device_add_resources(xhci, dwc->xhci_resources,
85 DWC3_XHCI_RESOURCES_NUM);
87 dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
91 memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
93 if (dwc->usb3_lpm_capable)
94 props[prop_idx++].name = "usb3-lpm-capable";
97 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
98 * where Port Disable command doesn't work.
100 * The suggested workaround is that we avoid Port Disable
103 * This following flag tells XHCI to do just that.
105 if (dwc->revision <= DWC3_REVISION_300A)
106 props[prop_idx++].name = "quirk-broken-port-ped";
109 ret = platform_device_add_properties(xhci, props);
111 dev_err(dwc->dev, "failed to add properties to xHCI\n");
116 phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
117 dev_name(&xhci->dev));
118 phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
119 dev_name(&xhci->dev));
121 ret = platform_device_add(xhci);
123 dev_err(dwc->dev, "failed to register xHCI device\n");
129 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
130 dev_name(&xhci->dev));
131 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
132 dev_name(&xhci->dev));
134 platform_device_put(xhci);
138 void dwc3_host_exit(struct dwc3 *dwc)
140 phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
141 dev_name(&dwc->xhci->dev));
142 phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
143 dev_name(&dwc->xhci->dev));
144 platform_device_unregister(dwc->xhci);