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
 22static int dwc3_host_get_irq(struct dwc3 *dwc)
 23{
 24	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
 25	int irq;
 26
 27	irq = platform_get_irq_byname(dwc3_pdev, "host");
 28	if (irq > 0)
 29		goto out;
 30
 31	if (irq == -EPROBE_DEFER)
 32		goto out;
 33
 34	irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
 35	if (irq > 0)
 36		goto out;
 37
 38	if (irq == -EPROBE_DEFER)
 39		goto out;
 40
 41	irq = platform_get_irq(dwc3_pdev, 0);
 42	if (irq > 0)
 43		goto out;
 44
 45	if (irq != -EPROBE_DEFER)
 46		dev_err(dwc->dev, "missing host IRQ\n");
 47
 48	if (!irq)
 49		irq = -EINVAL;
 50
 51out:
 52	return irq;
 53}
 54
 55int dwc3_host_init(struct dwc3 *dwc)
 56{
 57	struct property_entry	props[3];
 58	struct platform_device	*xhci;
 59	int			ret, irq;
 60	struct resource		*res;
 61	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
 62	int			prop_idx = 0;
 63
 64	irq = dwc3_host_get_irq(dwc);
 65	if (irq < 0)
 66		return irq;
 67
 68	res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
 69	if (!res)
 70		res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
 71				"dwc_usb3");
 72	if (!res)
 73		res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
 74	if (!res)
 75		return -ENOMEM;
 76
 77	dwc->xhci_resources[1].start = irq;
 78	dwc->xhci_resources[1].end = irq;
 79	dwc->xhci_resources[1].flags = res->flags;
 80	dwc->xhci_resources[1].name = res->name;
 81
 82	xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
 83	if (!xhci) {
 84		dev_err(dwc->dev, "couldn't allocate xHCI device\n");
 85		return -ENOMEM;
 86	}
 87
 88	xhci->dev.parent	= dwc->dev;
 89
 90	dwc->xhci = xhci;
 91
 92	ret = platform_device_add_resources(xhci, dwc->xhci_resources,
 93						DWC3_XHCI_RESOURCES_NUM);
 94	if (ret) {
 95		dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
 96		goto err1;
 97	}
 98
 99	memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
100
101	if (dwc->usb3_lpm_capable)
102		props[prop_idx++].name = "usb3-lpm-capable";
103
104	/**
105	 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
106	 * where Port Disable command doesn't work.
107	 *
108	 * The suggested workaround is that we avoid Port Disable
109	 * completely.
110	 *
111	 * This following flag tells XHCI to do just that.
112	 */
113	if (dwc->revision <= DWC3_REVISION_300A)
114		props[prop_idx++].name = "quirk-broken-port-ped";
115
116	if (prop_idx) {
117		ret = platform_device_add_properties(xhci, props);
118		if (ret) {
119			dev_err(dwc->dev, "failed to add properties to xHCI\n");
120			goto err1;
121		}
122	}
123
124	phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
125			  dev_name(dwc->dev));
126	phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
127			  dev_name(dwc->dev));
128
129	ret = platform_device_add(xhci);
130	if (ret) {
131		dev_err(dwc->dev, "failed to register xHCI device\n");
132		goto err2;
133	}
134
135	return 0;
136err2:
137	phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
138			  dev_name(dwc->dev));
139	phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
140			  dev_name(dwc->dev));
141err1:
142	platform_device_put(xhci);
143	return ret;
144}
145
146void dwc3_host_exit(struct dwc3 *dwc)
147{
148	phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
149			  dev_name(dwc->dev));
150	phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
151			  dev_name(dwc->dev));
152	platform_device_unregister(dwc->xhci);
153}