1/*
  2 * Generic platform ohci driver
  3 *
  4 * Copyright 2007 Michael Buesch <m@bues.ch>
  5 * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
  6 *
  7 * Derived from the OCHI-SSB driver
  8 * Derived from the OHCI-PCI driver
  9 * Copyright 1999 Roman Weissgaerber
 10 * Copyright 2000-2002 David Brownell
 11 * Copyright 1999 Linus Torvalds
 12 * Copyright 1999 Gregory P. Smith
 13 *
 14 * Licensed under the GNU/GPL. See COPYING for details.
 15 */
 16#include <linux/platform_device.h>
 17#include <linux/usb/ohci_pdriver.h>
 18
 19static int ohci_platform_reset(struct usb_hcd *hcd)
 20{
 21	struct platform_device *pdev = to_platform_device(hcd->self.controller);
 22	struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
 23	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 24	int err;
 25
 26	if (pdata->big_endian_desc)
 27		ohci->flags |= OHCI_QUIRK_BE_DESC;
 28	if (pdata->big_endian_mmio)
 29		ohci->flags |= OHCI_QUIRK_BE_MMIO;
 30	if (pdata->no_big_frame_no)
 31		ohci->flags |= OHCI_QUIRK_FRAME_NO;
 32
 33	ohci_hcd_init(ohci);
 34	err = ohci_init(ohci);
 35
 36	return err;
 37}
 38
 39static int ohci_platform_start(struct usb_hcd *hcd)
 40{
 41	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 42	int err;
 43
 44	err = ohci_run(ohci);
 45	if (err < 0) {
 46		ohci_err(ohci, "can't start\n");
 47		ohci_stop(hcd);
 48	}
 49
 50	return err;
 51}
 52
 53static const struct hc_driver ohci_platform_hc_driver = {
 54	.description		= hcd_name,
 55	.product_desc		= "Generic Platform OHCI Controller",
 56	.hcd_priv_size		= sizeof(struct ohci_hcd),
 57
 58	.irq			= ohci_irq,
 59	.flags			= HCD_MEMORY | HCD_USB11,
 60
 61	.reset			= ohci_platform_reset,
 62	.start			= ohci_platform_start,
 63	.stop			= ohci_stop,
 64	.shutdown		= ohci_shutdown,
 65
 66	.urb_enqueue		= ohci_urb_enqueue,
 67	.urb_dequeue		= ohci_urb_dequeue,
 68	.endpoint_disable	= ohci_endpoint_disable,
 69
 70	.get_frame_number	= ohci_get_frame,
 71
 72	.hub_status_data	= ohci_hub_status_data,
 73	.hub_control		= ohci_hub_control,
 74#ifdef	CONFIG_PM
 75	.bus_suspend		= ohci_bus_suspend,
 76	.bus_resume		= ohci_bus_resume,
 77#endif
 78
 79	.start_port_reset	= ohci_start_port_reset,
 80};
 81
 82static int __devinit ohci_platform_probe(struct platform_device *dev)
 83{
 84	struct usb_hcd *hcd;
 85	struct resource *res_mem;
 86	int irq;
 87	int err = -ENOMEM;
 88
 89	BUG_ON(!dev->dev.platform_data);
 90
 91	if (usb_disabled())
 92		return -ENODEV;
 93
 94	irq = platform_get_irq(dev, 0);
 95	if (irq < 0) {
 96		pr_err("no irq provided");
 97		return irq;
 98	}
 99
100	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
101	if (!res_mem) {
102		pr_err("no memory recourse provided");
103		return -ENXIO;
104	}
105
106	hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
107			dev_name(&dev->dev));
108	if (!hcd)
109		return -ENOMEM;
110
111	hcd->rsrc_start = res_mem->start;
112	hcd->rsrc_len = resource_size(res_mem);
113
114	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
115		pr_err("controller already in use");
116		err = -EBUSY;
117		goto err_put_hcd;
118	}
119
120	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
121	if (!hcd->regs)
122		goto err_release_region;
123	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
124	if (err)
125		goto err_iounmap;
126
127	platform_set_drvdata(dev, hcd);
128
129	return err;
130
131err_iounmap:
132	iounmap(hcd->regs);
133err_release_region:
134	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
135err_put_hcd:
136	usb_put_hcd(hcd);
137	return err;
138}
139
140static int __devexit ohci_platform_remove(struct platform_device *dev)
141{
142	struct usb_hcd *hcd = platform_get_drvdata(dev);
143
144	usb_remove_hcd(hcd);
145	iounmap(hcd->regs);
146	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
147	usb_put_hcd(hcd);
148	platform_set_drvdata(dev, NULL);
149
150	return 0;
151}
152
153#ifdef CONFIG_PM
154
155static int ohci_platform_suspend(struct device *dev)
156{
157	return 0;
158}
159
160static int ohci_platform_resume(struct device *dev)
161{
162	struct usb_hcd *hcd = dev_get_drvdata(dev);
163
164	ohci_finish_controller_resume(hcd);
165	return 0;
166}
167
168#else /* !CONFIG_PM */
169#define ohci_platform_suspend	NULL
170#define ohci_platform_resume	NULL
171#endif /* CONFIG_PM */
172
173static const struct platform_device_id ohci_platform_table[] = {
174	{ "ohci-platform", 0 },
175	{ }
176};
177MODULE_DEVICE_TABLE(platform, ohci_platform_table);
178
179static const struct dev_pm_ops ohci_platform_pm_ops = {
180	.suspend	= ohci_platform_suspend,
181	.resume		= ohci_platform_resume,
182};
183
184static struct platform_driver ohci_platform_driver = {
185	.id_table	= ohci_platform_table,
186	.probe		= ohci_platform_probe,
187	.remove		= __devexit_p(ohci_platform_remove),
188	.shutdown	= usb_hcd_platform_shutdown,
189	.driver		= {
190		.owner	= THIS_MODULE,
191		.name	= "ohci-platform",
192		.pm	= &ohci_platform_pm_ops,
193	}
194};