/* * 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 * (C) Copyright 2005 Embedded Alley Solutions, Inc. * * Bus Glue for PNX8550 * * 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 PNX8550 from ohci-sa1111.c and sa-omap.c *  by Vitaly Wool <vitalywool@gmail.com> * * This file is licenced under the GPL. */#include <linux/device.h>#include <linux/platform_device.h>#include <asm/mach-pnx8550/usb.h>#include <asm/mach-pnx8550/int.h>#include <asm/mach-pnx8550/pci.h>#ifndef CONFIG_PNX8550#error "This file is PNX8550 bus glue.  CONFIG_PNX8550 must be defined."#endifextern int usb_disabled(void);/*-------------------------------------------------------------------------*/static void pnx8550_start_hc(struct platform_device *dev){	/*	 * Set register CLK48CTL to enable and 48MHz	 */	outl(0x00000003, PCI_BASE | 0x0004770c);	/*	 * Set register CLK12CTL to enable and 48MHz	 */	outl(0x00000003, PCI_BASE | 0x00047710);	udelay(100);}static void pnx8550_stop_hc(struct platform_device *dev){	udelay(10);}/*-------------------------------------------------------------------------*//* configure so an HC device and id are always provided *//* always called with process context; sleeping is OK *//** * usb_hcd_pnx8550_probe - initialize pnx8550-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_pnx8550_probe (const struct hc_driver *driver,			  struct platform_device *dev){	int retval;	struct usb_hcd *hcd;	if (dev->resource[0].flags != IORESOURCE_MEM ||			dev->resource[1].flags != IORESOURCE_IRQ) {		dev_err (&dev->dev,"invalid resource type\n");		return -ENOMEM;	}	hcd = usb_create_hcd (driver, &dev->dev, "pnx8550");	if (!hcd)		return -ENOMEM;	hcd->rsrc_start = dev->resource[0].start;	hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {		dev_err(&dev->dev, "request_mem_region [0x%08llx, 0x%08llx] "				"failed\n", hcd->rsrc_start, hcd->rsrc_len);		retval = -EBUSY;		goto err1;	}	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);	if (!hcd->regs) {		dev_err(&dev->dev, "ioremap [[0x%08llx, 0x%08llx] failed\n",				hcd->rsrc_start, hcd->rsrc_len);		retval = -ENOMEM;		goto err2;	}	pnx8550_start_hc(dev);	ohci_hcd_init(hcd_to_ohci(hcd));	retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);	if (retval == 0)		return retval;	pnx8550_stop_hc(dev);	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_pnx8550_remove - shutdown processing for pnx8550-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_pnx8550_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_pnx8550_remove (struct usb_hcd *hcd, struct platform_device *dev){	usb_remove_hcd(hcd);	pnx8550_stop_hc(dev);	iounmap(hcd->regs);	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);	usb_put_hcd(hcd);}/*-------------------------------------------------------------------------*/static int __devinitohci_pnx8550_start (struct usb_hcd *hcd){	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);	int		ret;	ohci_dbg (ohci, "ohci_pnx8550_start, ohci:%p", ohci);	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_pnx8550_hc_driver = {	.description =		hcd_name,	.product_desc =		"PNX8550 OHCI",	.hcd_priv_size =	sizeof(struct ohci_hcd),	/*	 * generic hardware linkage	 */	.irq =			ohci_irq,	.flags =		HCD_USB11 | HCD_MEMORY,	/*	 * basic lifecycle operations	 */	.start =		ohci_pnx8550_start,	.stop =			ohci_stop,	/*	 * 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_pnx8550_drv_probe(struct platform_device *pdev){	int ret;	if (usb_disabled())		return -ENODEV;	ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev);	return ret;}static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev){	struct usb_hcd *hcd = platform_get_drvdata(pdev);	usb_hcd_pnx8550_remove(hcd, pdev);	return 0;}MODULE_ALIAS("pnx8550-ohci");static struct platform_driver ohci_hcd_pnx8550_driver = {	.driver = {		.name		= "pnx8550-ohci",	},	.probe		= ohci_hcd_pnx8550_drv_probe,	.remove		= ohci_hcd_pnx8550_drv_remove,};