drivers/usb/host/ohci-platform.c

/*
 * Generic platform ohci driver
 *
 * Copyright 2007 Michael Buesch <m@bues.ch>
 * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
 *
 * Derived from the OCHI-SSB driver
 * Derived from the OHCI-PCI driver
 * Copyright 1999 Roman Weissgaerber
 * Copyright 2000-2002 David Brownell
 * Copyright 1999 Linus Torvalds
 * Copyright 1999 Gregory P. Smith
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */
#include <linux/platform_device.h>
#include <linux/usb/ohci_pdriver.h>

static int ohci_platform_reset(struct usb_hcd *hcd)
{
	struct platform_device *pdev = to_platform_device(hcd->self.controller);
	struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	int err;

	if (pdata->big_endian_desc)
		ohci->flags |= OHCI_QUIRK_BE_DESC;
	if (pdata->big_endian_mmio)
		ohci->flags |= OHCI_QUIRK_BE_MMIO;
	if (pdata->no_big_frame_no)
		ohci->flags |= OHCI_QUIRK_FRAME_NO;

	ohci_hcd_init(ohci);
	err = ohci_init(ohci);

	return err;
}

static int ohci_platform_start(struct usb_hcd *hcd)
{
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	int err;

	err = ohci_run(ohci);
	if (err < 0) {
		ohci_err(ohci, "can't start\n");
		ohci_stop(hcd);
	}

	return err;
}

static const struct hc_driver ohci_platform_hc_driver = {
	.description		= hcd_name,
	.product_desc		= "Generic Platform OHCI Controller",
	.hcd_priv_size		= sizeof(struct ohci_hcd),

	.irq			= ohci_irq,
	.flags			= HCD_MEMORY | HCD_USB11,

	.reset			= ohci_platform_reset,
	.start			= ohci_platform_start,
	.stop			= ohci_stop,
	.shutdown		= ohci_shutdown,

	.urb_enqueue		= ohci_urb_enqueue,
	.urb_dequeue		= ohci_urb_dequeue,
	.endpoint_disable	= ohci_endpoint_disable,

	.get_frame_number	= ohci_get_frame,

	.hub_status_data	= ohci_hub_status_data,
	.hub_control		= ohci_hub_control,
#ifdef	CONFIG_PM
	.bus_suspend		= ohci_bus_suspend,
	.bus_resume		= ohci_bus_resume,
#endif

	.start_port_reset	= ohci_start_port_reset,
};

static int __devinit ohci_platform_probe(struct platform_device *dev)
{
	struct usb_hcd *hcd;
	struct resource *res_mem;
	struct usb_ohci_pdata *pdata = dev->dev.platform_data;
	int irq;
	int err = -ENOMEM;

	if (!pdata) {
		WARN_ON(1);
		return -ENODEV;
	}

	if (usb_disabled())
		return -ENODEV;

	irq = platform_get_irq(dev, 0);
	if (irq < 0) {
		pr_err("no irq provided");
		return irq;
	}

	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
	if (!res_mem) {
		pr_err("no memory recourse provided");
		return -ENXIO;
	}

	if (pdata->power_on) {
		err = pdata->power_on(dev);
		if (err < 0)
			return err;
	}

	hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
			dev_name(&dev->dev));
	if (!hcd) {
		err = -ENOMEM;
		goto err_power;
	}

	hcd->rsrc_start = res_mem->start;
	hcd->rsrc_len = resource_size(res_mem);

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		pr_err("controller already in use");
		err = -EBUSY;
		goto err_put_hcd;
	}

	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs)
		goto err_release_region;
	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (err)
		goto err_iounmap;

	platform_set_drvdata(dev, hcd);

	return err;

err_iounmap:
	iounmap(hcd->regs);
err_release_region:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err_put_hcd:
	usb_put_hcd(hcd);
err_power:
	if (pdata->power_off)
		pdata->power_off(dev);

	return err;
}

static int __devexit ohci_platform_remove(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);
	struct usb_ohci_pdata *pdata = dev->dev.platform_data;

	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	platform_set_drvdata(dev, NULL);

	if (pdata->power_off)
		pdata->power_off(dev);

	return 0;
}

#ifdef CONFIG_PM

static int ohci_platform_suspend(struct device *dev)
{
	struct usb_ohci_pdata *pdata = dev->platform_data;
	struct platform_device *pdev =
		container_of(dev, struct platform_device, dev);

	if (pdata->power_suspend)
		pdata->power_suspend(pdev);

	return 0;
}

static int ohci_platform_resume(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct usb_ohci_pdata *pdata = dev->platform_data;
	struct platform_device *pdev =
		container_of(dev, struct platform_device, dev);

	if (pdata->power_on) {
		int err = pdata->power_on(pdev);
		if (err < 0)
			return err;
	}

	ohci_finish_controller_resume(hcd);
	return 0;
}

#else /* !CONFIG_PM */
#define ohci_platform_suspend	NULL
#define ohci_platform_resume	NULL
#endif /* CONFIG_PM */

static const struct platform_device_id ohci_platform_table[] = {
	{ "ohci-platform", 0 },
	{ }
};
MODULE_DEVICE_TABLE(platform, ohci_platform_table);

static const struct dev_pm_ops ohci_platform_pm_ops = {
	.suspend	= ohci_platform_suspend,
	.resume		= ohci_platform_resume,
};

static struct platform_driver ohci_platform_driver = {
	.id_table	= ohci_platform_table,
	.probe		= ohci_platform_probe,
	.remove		= __devexit_p(ohci_platform_remove),
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "ohci-platform",
		.pm	= &ohci_platform_pm_ops,
	}
};