/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> * (C) Copyright 2002 Hewlett-Packard Company * * Bus Glue for ep93xx. * * Written by Christopher Hoover <ch@hpl.hp.com> * Based on fragments of previous driver by Russell King et al. * * Modified for LH7A404 from ohci-sa1111.c *  by Durgesh Pattamatta <pattamattad@sharpsec.com> * * Modified for pxa27x from ohci-lh7a404.c *  by Nick Bane <nick@cecomputing.co.uk> 26-8-2004 * * Modified for ep93xx from ohci-pxa27x.c *  by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006 *  Based on an earlier driver by Ray Lehtiniemi * * This file is licenced under the GPL. */#include <linux/clk.h>#include <linux/device.h>#include <linux/signal.h>#include <linux/platform_device.h>#include <asm/mach-types.h>#include <asm/hardware.h>static struct clk *usb_host_clock;static void ep93xx_start_hc(struct device *dev){	clk_enable(usb_host_clock);}static void ep93xx_stop_hc(struct device *dev){	clk_disable(usb_host_clock);}static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,			 struct platform_device *pdev){	int retval;	struct usb_hcd *hcd;	if (pdev->resource[1].flags != IORESOURCE_IRQ) {		pr_debug("resource[1] is not IORESOURCE_IRQ");		return -ENOMEM;	}	hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx");	if (hcd == NULL)		return -ENOMEM;	hcd->rsrc_start = pdev->resource[0].start;	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {		usb_put_hcd(hcd);		retval = -EBUSY;		goto err1;	}	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);	if (hcd->regs == NULL) {		pr_debug("ioremap failed");		retval = -ENOMEM;		goto err2;	}	usb_host_clock = clk_get(&pdev->dev, "usb_host");	ep93xx_start_hc(&pdev->dev);	ohci_hcd_init(hcd_to_ohci(hcd));	retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);	if (retval == 0)		return retval;	ep93xx_stop_hc(&pdev->dev);	iounmap(hcd->regs);err2:	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);err1:	usb_put_hcd(hcd);	return retval;}static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd,			struct platform_device *pdev){	usb_remove_hcd(hcd);	ep93xx_stop_hc(&pdev->dev);	clk_put(usb_host_clock);	iounmap(hcd->regs);	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);	usb_put_hcd(hcd);}static int __devinit ohci_ep93xx_start(struct usb_hcd *hcd){	struct ohci_hcd *ohci = hcd_to_ohci(hcd);	int ret;	if ((ret = ohci_init(ohci)) < 0)		return ret;	if ((ret = ohci_run(ohci)) < 0) {		err("can't start %s", hcd->self.bus_name);		ohci_stop(hcd);		return ret;	}	return 0;}static struct hc_driver ohci_ep93xx_hc_driver = {	.description		= hcd_name,	.product_desc		= "EP93xx OHCI",	.hcd_priv_size		= sizeof(struct ohci_hcd),	.irq			= ohci_irq,	.flags			= HCD_USB11 | HCD_MEMORY,	.start			= ohci_ep93xx_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,	.hub_irq_enable		= ohci_rhsc_enable,#ifdef CONFIG_PM	.bus_suspend		= ohci_bus_suspend,	.bus_resume		= ohci_bus_resume,#endif	.start_port_reset	= ohci_start_port_reset,};extern int usb_disabled(void);static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev){	int ret;	ret = -ENODEV;	if (!usb_disabled())		ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev);	return ret;}static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev){	struct usb_hcd *hcd = platform_get_drvdata(pdev);	usb_hcd_ep93xx_remove(hcd, pdev);	return 0;}#ifdef CONFIG_PMstatic int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state){	struct usb_hcd *hcd = platform_get_drvdata(pdev);	struct ohci_hcd *ohci = hcd_to_ohci(hcd);	if (time_before(jiffies, ohci->next_statechange))		msleep(5);	ohci->next_statechange = jiffies;	ep93xx_stop_hc(&pdev->dev);	hcd->state = HC_STATE_SUSPENDED;	pdev->dev.power.power_state = PMSG_SUSPEND;	return 0;}static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev){	struct usb_hcd *hcd = platform_get_drvdata(pdev);	struct ohci_hcd *ohci = hcd_to_ohci(hcd);	int status;	if (time_before(jiffies, ohci->next_statechange))		msleep(5);	ohci->next_statechange = jiffies;	ep93xx_start_hc(&pdev->dev);	pdev->dev.power.power_state = PMSG_ON;	usb_hcd_resume_root_hub(hcd);	return 0;}#endifstatic struct platform_driver ohci_hcd_ep93xx_driver = {	.probe		= ohci_hcd_ep93xx_drv_probe,	.remove		= ohci_hcd_ep93xx_drv_remove,	.shutdown	= usb_hcd_platform_shutdown,#ifdef CONFIG_PM	.suspend	= ohci_hcd_ep93xx_drv_suspend,	.resume		= ohci_hcd_ep93xx_drv_resume,#endif	.driver		= {		.name	= "ep93xx-ohci",	},};