/* * 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 AMD Alchemy Au1xxx * * Written by Christopher Hoover <ch@hpl.hp.com> * Based on fragments of previous driver by Rusell King et al. * * Modified for LH7A404 from ohci-sa1111.c *  by Durgesh Pattamatta <pattamattad@sharpsec.com> * Modified for AMD Alchemy Au1xxx *  by Matt Porter <mporter@kernel.crashing.org> * * This file is licenced under the GPL. */#include <linux/platform_device.h>#include <linux/signal.h>#include <asm/mach-au1x00/au1000.h>#ifndef	CONFIG_SOC_AU1200#define USBH_ENABLE_BE (1<<0)#define USBH_ENABLE_C  (1<<1)#define USBH_ENABLE_E  (1<<2)#define USBH_ENABLE_CE (1<<3)#define USBH_ENABLE_RD (1<<4)#ifdef __LITTLE_ENDIAN#define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C)#elif __BIG_ENDIAN#define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C | USBH_ENABLE_BE)#else#error not byte order defined#endif#else   /* Au1200 */#define USB_HOST_CONFIG    (USB_MSR_BASE + USB_MSR_MCFG)#define USB_MCFG_PFEN     (1<<31)#define USB_MCFG_RDCOMB   (1<<30)#define USB_MCFG_SSDEN    (1<<23)#define USB_MCFG_OHCCLKEN (1<<16)#define USB_MCFG_UCAM     (1<<7)#define USB_MCFG_OBMEN    (1<<1)#define USB_MCFG_OMEMEN   (1<<0)#define USBH_ENABLE_CE    USB_MCFG_OHCCLKEN#ifdef CONFIG_DMA_COHERENT#define USBH_ENABLE_INIT  (USB_MCFG_OHCCLKEN \                         | USB_MCFG_PFEN | USB_MCFG_RDCOMB \                         | USB_MCFG_SSDEN | USB_MCFG_UCAM \                         | USB_MCFG_OBMEN | USB_MCFG_OMEMEN)#else#define USBH_ENABLE_INIT  (USB_MCFG_OHCCLKEN \                         | USB_MCFG_PFEN | USB_MCFG_RDCOMB \                         | USB_MCFG_SSDEN \                         | USB_MCFG_OBMEN | USB_MCFG_OMEMEN)#endif#define USBH_DISABLE      (USB_MCFG_OBMEN | USB_MCFG_OMEMEN)#endif  /* Au1200 */extern int usb_disabled(void);/*-------------------------------------------------------------------------*/static void au1xxx_start_ohc(struct platform_device *dev){	printk(KERN_DEBUG __FILE__		": starting Au1xxx OHCI USB Controller\n");	/* enable host controller */#ifndef CONFIG_SOC_AU1200	au_writel(USBH_ENABLE_CE, USB_HOST_CONFIG);	udelay(1000);	au_writel(USBH_ENABLE_INIT, USB_HOST_CONFIG);	udelay(1000);#else   /* Au1200 */	/* write HW defaults again in case Yamon cleared them */	if (au_readl(USB_HOST_CONFIG) == 0) {		au_writel(0x00d02000, USB_HOST_CONFIG);		au_readl(USB_HOST_CONFIG);		udelay(1000);	}	au_writel(USBH_ENABLE_CE | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);	au_readl(USB_HOST_CONFIG);	udelay(1000);	au_writel(USBH_ENABLE_INIT | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);	au_readl(USB_HOST_CONFIG);	udelay(1000);#endif  /* Au1200 */#ifndef CONFIG_SOC_AU1200	/* wait for reset complete (read register twice; see au1500 errata) */	while (au_readl(USB_HOST_CONFIG),		!(au_readl(USB_HOST_CONFIG) & USBH_ENABLE_RD))#endif		udelay(1000);	printk(KERN_DEBUG __FILE__	": Clock to USB host has been enabled \n");}static void au1xxx_stop_ohc(struct platform_device *dev){	printk(KERN_DEBUG __FILE__	       ": stopping Au1xxx OHCI USB Controller\n");#ifndef CONFIG_SOC_AU1200	/* Disable clock */	au_writel(au_readl(USB_HOST_CONFIG) & ~USBH_ENABLE_CE, USB_HOST_CONFIG);#else   /* Au1200 */	/* Disable mem */	au_writel(~USBH_DISABLE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);	udelay(1000);	/* Disable clock */	au_writel(~USBH_ENABLE_CE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);	au_readl(USB_HOST_CONFIG);#endif  /* Au1200 */}/*-------------------------------------------------------------------------*//* configure so an HC device and id are always provided *//* always called with process context; sleeping is OK *//** * usb_ohci_au1xxx_probe - initialize Au1xxx-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. * */static int usb_ohci_au1xxx_probe(const struct hc_driver *driver,			  struct platform_device *dev){	int retval;	struct usb_hcd *hcd;#if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT)	/* Au1200 AB USB does not support coherent memory */	if (!(read_c0_prid() & 0xff)) {		pr_info("%s: this is chip revision AB !!\n",			dev->name);		pr_info("%s: update your board or re-configure the kernel\n",			dev->name);		return -ENODEV;	}#endif	if (dev->resource[1].flags != IORESOURCE_IRQ) {		pr_debug("resource[1] is not IORESOURCE_IRQ\n");		return -ENOMEM;	}	hcd = usb_create_hcd(driver, &dev->dev, "au1xxx");	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)) {		pr_debug("request_mem_region failed\n");		retval = -EBUSY;		goto err1;	}	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);	if (!hcd->regs) {		pr_debug("ioremap failed\n");		retval = -ENOMEM;		goto err2;	}	au1xxx_start_ohc(dev);	ohci_hcd_init(hcd_to_ohci(hcd));	retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED | IRQF_SHARED);	if (retval == 0)		return retval;	au1xxx_stop_ohc(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_au1xxx_remove - shutdown processing for Au1xxx-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_au1xxx_probe(), first invoking * the HCD's stop() method.  It is always called from a thread * context, normally "rmmod", "apmd", or something similar. * */static void usb_ohci_au1xxx_remove(struct usb_hcd *hcd, struct platform_device *dev){	usb_remove_hcd(hcd);	au1xxx_stop_ohc(dev);	iounmap(hcd->regs);	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);	usb_put_hcd(hcd);}/*-------------------------------------------------------------------------*/static int __devinitohci_au1xxx_start (struct usb_hcd *hcd){	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);	int		ret;	ohci_dbg (ohci, "ohci_au1xxx_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_au1xxx_hc_driver = {	.description =		hcd_name,	.product_desc =		"Au1xxx OHCI",	.hcd_priv_size =	sizeof(struct ohci_hcd),	/*	 * generic hardware linkage	 */	.irq =			ohci_irq,	.flags =		HCD_USB11 | HCD_MEMORY,	/*	 * basic lifecycle operations	 */	.start =		ohci_au1xxx_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_au1xxx_drv_probe(struct platform_device *pdev){	int ret;	pr_debug ("In ohci_hcd_au1xxx_drv_probe");	if (usb_disabled())		return -ENODEV;	ret = usb_ohci_au1xxx_probe(&ohci_au1xxx_hc_driver, pdev);	return ret;}static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev){	struct usb_hcd *hcd = platform_get_drvdata(pdev);	usb_ohci_au1xxx_remove(hcd, pdev);	return 0;}	/*TBD*//*static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *dev){	struct usb_hcd *hcd = platform_get_drvdata(dev);	return 0;}static int ohci_hcd_au1xxx_drv_resume(struct platform_device *dev){	struct usb_hcd *hcd = platform_get_drvdata(dev);	return 0;}*/static struct platform_driver ohci_hcd_au1xxx_driver = {	.probe		= ohci_hcd_au1xxx_drv_probe,	.remove		= ohci_hcd_au1xxx_drv_remove,	.shutdown	= usb_hcd_platform_shutdown,	/*.suspend	= ohci_hcd_au1xxx_drv_suspend, */	/*.resume	= ohci_hcd_au1xxx_drv_resume, */	.driver		= {		.name	= "au1xxx-ohci",		.owner	= THIS_MODULE,	},};