/* * 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 pxa27x * * 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 * * This file is licenced under the GPL. */#include <linux/device.h>#include <linux/signal.h>#include <linux/platform_device.h>#include <asm/mach-types.h>#include <asm/hardware.h>#include <asm/arch/pxa-regs.h>#include <asm/arch/ohci.h>#define PXA_UHC_MAX_PORTNUM    3#define UHCRHPS(x)              __REG2( 0x4C000050, (x)<<2 )/*  PMM_NPS_MODE -- PMM Non-power switching mode      Ports are powered continuously.  PMM_GLOBAL_MODE -- PMM global switching mode      All ports are powered at the same time.  PMM_PERPORT_MODE -- PMM per port switching mode      Ports are powered individually. */static int pxa27x_ohci_select_pmm( int mode ){	switch ( mode ) {	case PMM_NPS_MODE:		UHCRHDA |= RH_A_NPS;		break;	case PMM_GLOBAL_MODE:		UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);		break;	case PMM_PERPORT_MODE:		UHCRHDA &= ~(RH_A_NPS);		UHCRHDA |= RH_A_PSM;		/* Set port power control mask bits, only 3 ports. */		UHCRHDB |= (0x7<<17);		break;	default:		printk( KERN_ERR			"Invalid mode %d, set to non-power switch mode.\n",			mode );		UHCRHDA |= RH_A_NPS;	}	return 0;}extern int usb_disabled(void);/*-------------------------------------------------------------------------*/static int pxa27x_start_hc(struct device *dev){	int retval = 0;	struct pxaohci_platform_data *inf;	inf = dev->platform_data;	pxa_set_cken(CKEN10_USBHOST, 1);	UHCHR |= UHCHR_FHR;	udelay(11);	UHCHR &= ~UHCHR_FHR;	UHCHR |= UHCHR_FSBIR;	while (UHCHR & UHCHR_FSBIR)		cpu_relax();	if (inf->init)		retval = inf->init(dev);	if (retval < 0)		return retval;	UHCHR &= ~UHCHR_SSE;	UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);	/* Clear any OTG Pin Hold */	if (PSSR & PSSR_OTGPH)		PSSR |= PSSR_OTGPH;	return 0;}static void pxa27x_stop_hc(struct device *dev){	struct pxaohci_platform_data *inf;	inf = dev->platform_data;	if (inf->exit)		inf->exit(dev);	UHCHR |= UHCHR_FHR;	udelay(11);	UHCHR &= ~UHCHR_FHR;	UHCCOMS |= 1;	udelay(10);	pxa_set_cken(CKEN10_USBHOST, 0);}/*-------------------------------------------------------------------------*//* configure so an HC device and id are always provided *//* always called with process context; sleeping is OK *//** * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs * Context: !in_interrupt() * * Allocates basic resources for this USB host controller, and * then invokes the start() method for the HCD associated with it * through the hotplug entry's driver_data. * */int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev){	int retval;	struct usb_hcd *hcd;	struct pxaohci_platform_data *inf;	inf = pdev->dev.platform_data;	if (!inf)		return -ENODEV;	if (pdev->resource[1].flags != IORESOURCE_IRQ) {		pr_debug ("resource[1] is not IORESOURCE_IRQ");		return -ENOMEM;	}	hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");	if (!hcd)		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)) {		pr_debug("request_mem_region failed");		retval = -EBUSY;		goto err1;	}	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);	if (!hcd->regs) {		pr_debug("ioremap failed");		retval = -ENOMEM;		goto err2;	}	if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) {		pr_debug("pxa27x_start_hc failed");		goto err3;	}	/* Select Power Management Mode */	pxa27x_ohci_select_pmm(inf->port_mode);	if (inf->power_budget)		hcd->power_budget = inf->power_budget;	ohci_hcd_init(hcd_to_ohci(hcd));	retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);	if (retval == 0)		return retval;	pxa27x_stop_hc(&pdev->dev); err3:	iounmap(hcd->regs); err2:	release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err1:	usb_put_hcd(hcd);	return retval;}/* may be called without controller electrically present *//* may be called with controller, bus, and devices active *//** * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking * the HCD's stop() method.  It is always called from a thread * context, normally "rmmod", "apmd", or something similar. * */void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev){	usb_remove_hcd(hcd);	pxa27x_stop_hc(&pdev->dev);	iounmap(hcd->regs);	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);	usb_put_hcd(hcd);}/*-------------------------------------------------------------------------*/static int __devinitohci_pxa27x_start (struct usb_hcd *hcd){	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);	int		ret;	ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);	/* The value of NDP in roothub_a is incorrect on this hardware */	ohci->num_ports = 3;	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 const struct hc_driver ohci_pxa27x_hc_driver = {	.description =		hcd_name,	.product_desc =		"PXA27x OHCI",	.hcd_priv_size =	sizeof(struct ohci_hcd),	/*	 * generic hardware linkage	 */	.irq =			ohci_irq,	.flags =		HCD_USB11 | HCD_MEMORY,	/*	 * basic lifecycle operations	 */	.start =		ohci_pxa27x_start,	.stop =			ohci_stop,	.shutdown =		ohci_shutdown,	/*	 * managing i/o requests and associated device resources	 */	.urb_enqueue =		ohci_urb_enqueue,	.urb_dequeue =		ohci_urb_dequeue,	.endpoint_disable =	ohci_endpoint_disable,	/*	 * scheduling support	 */	.get_frame_number =	ohci_get_frame,	/*	 * root hub support	 */	.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,};/*-------------------------------------------------------------------------*/static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev){	pr_debug ("In ohci_hcd_pxa27x_drv_probe");	if (usb_disabled())		return -ENODEV;	return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);}static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev){	struct usb_hcd *hcd = platform_get_drvdata(pdev);	usb_hcd_pxa27x_remove(hcd, pdev);	platform_set_drvdata(pdev, NULL);	return 0;}#ifdef	CONFIG_PMstatic int ohci_hcd_pxa27x_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;	pxa27x_stop_hc(&pdev->dev);	hcd->state = HC_STATE_SUSPENDED;	pdev->dev.power.power_state = PMSG_SUSPEND;	return 0;}static int ohci_hcd_pxa27x_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;	if ((status = pxa27x_start_hc(&pdev->dev)) < 0)		return status;	pdev->dev.power.power_state = PMSG_ON;	usb_hcd_resume_root_hub(hcd);	return 0;}#endifstatic struct platform_driver ohci_hcd_pxa27x_driver = {	.probe		= ohci_hcd_pxa27x_drv_probe,	.remove		= ohci_hcd_pxa27x_drv_remove,	.shutdown	= usb_hcd_platform_shutdown,#ifdef CONFIG_PM	.suspend	= ohci_hcd_pxa27x_drv_suspend,	.resume		= ohci_hcd_pxa27x_drv_resume,#endif	.driver		= {		.name	= "pxa27x-ohci",	},};