/* * EHCI HCD (Host Controller Driver) for USB. * * Bus Glue for AMD Alchemy Au1xxx * * Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org> * * Modified for AMD Alchemy Au1200 EHC *  by K.Boge <karsten.boge@amd.com> * * This file is licenced under the GPL. */#include <linux/platform_device.h>#include <asm/mach-au1x00/au1000.h>#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_PHYPLLEN (1<<19)#define USB_MCFG_EHCCLKEN (1<<17)#define USB_MCFG_UCAM     (1<<7)#define USB_MCFG_EBMEN    (1<<3)#define USB_MCFG_EMEMEN   (1<<2)#define USBH_ENABLE_CE    (USB_MCFG_PHYPLLEN | USB_MCFG_EHCCLKEN)#ifdef CONFIG_DMA_COHERENT#define USBH_ENABLE_INIT  (USBH_ENABLE_CE \                         | USB_MCFG_PFEN | USB_MCFG_RDCOMB \                         | USB_MCFG_SSDEN | USB_MCFG_UCAM \                         | USB_MCFG_EBMEN | USB_MCFG_EMEMEN)#else#define USBH_ENABLE_INIT  (USBH_ENABLE_CE \                         | USB_MCFG_PFEN | USB_MCFG_RDCOMB \                         | USB_MCFG_SSDEN \                         | USB_MCFG_EBMEN | USB_MCFG_EMEMEN)#endif#define USBH_DISABLE      (USB_MCFG_EBMEN | USB_MCFG_EMEMEN)extern int usb_disabled(void);/*-------------------------------------------------------------------------*/static void au1xxx_start_ehc(struct platform_device *dev){	pr_debug(__FILE__ ": starting Au1xxx EHCI USB Controller\n");	/* 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);	}	/* enable host controller */	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);	pr_debug(__FILE__ ": Clock to USB host has been enabled\n");}static void au1xxx_stop_ehc(struct platform_device *dev){	pr_debug(__FILE__ ": stopping Au1xxx EHCI USB Controller\n");	/* Disable mem */	au_writel(~USBH_DISABLE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);	udelay(1000);	/* Disable clock */	au_writel(~USB_MCFG_EHCCLKEN & au_readl(USB_HOST_CONFIG),		  USB_HOST_CONFIG);	au_readl(USB_HOST_CONFIG);}/*-------------------------------------------------------------------------*//* configure so an HC device and id are always provided *//* always called with process context; sleeping is OK *//** * usb_ehci_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. * */int usb_ehci_au1xxx_probe(const struct hc_driver *driver,			  struct usb_hcd **hcd_out, struct platform_device *dev){	int retval;	struct usb_hcd *hcd;	struct ehci_hcd *ehci;#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	au1xxx_start_ehc(dev);	if (dev->resource[1].flags != IORESOURCE_IRQ) {		pr_debug("resource[1] is not IORESOURCE_IRQ");		retval = -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");		retval = -EBUSY;		goto err1;	}	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);	if (!hcd->regs) {		pr_debug("ioremap failed");		retval = -ENOMEM;		goto err2;	}	ehci = hcd_to_ehci(hcd);	ehci->caps = hcd->regs;	ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));	/* cache this readonly data; minimize chip reads */	ehci->hcs_params = readl(&ehci->caps->hcs_params);	/* ehci_hcd_init(hcd_to_ehci(hcd)); */	retval =	    usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED | IRQF_SHARED);	if (retval == 0)		return retval;	au1xxx_stop_ehc(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_ehci_hcd_au1xxx_remove - shutdown processing for Au1xxx-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_ehci_hcd_au1xxx_probe(), first invoking * the HCD's stop() method.  It is always called from a thread * context, normally "rmmod", "apmd", or something similar. * */void usb_ehci_au1xxx_remove(struct usb_hcd *hcd, struct platform_device *dev){	usb_remove_hcd(hcd);	iounmap(hcd->regs);	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);	usb_put_hcd(hcd);	au1xxx_stop_ehc(dev);}/*-------------------------------------------------------------------------*/static const struct hc_driver ehci_au1xxx_hc_driver = {	.description = hcd_name,	.product_desc = "Au1xxx EHCI",	.hcd_priv_size = sizeof(struct ehci_hcd),	/*	 * generic hardware linkage	 */	.irq = ehci_irq,	.flags = HCD_MEMORY | HCD_USB2,	/*	 * basic lifecycle operations	 *	 * FIXME -- ehci_init() doesn't do enough here.	 * See ehci-ppc-soc for a complete implementation.	 */	.reset = ehci_init,	.start = ehci_run,	.stop = ehci_stop,	.shutdown = ehci_shutdown,	/*	 * managing i/o requests and associated device resources	 */	.urb_enqueue = ehci_urb_enqueue,	.urb_dequeue = ehci_urb_dequeue,	.endpoint_disable = ehci_endpoint_disable,	/*	 * scheduling support	 */	.get_frame_number = ehci_get_frame,	/*	 * root hub support	 */	.hub_status_data = ehci_hub_status_data,	.hub_control = ehci_hub_control,	.bus_suspend = ehci_bus_suspend,	.bus_resume = ehci_bus_resume,};/*-------------------------------------------------------------------------*/static int ehci_hcd_au1xxx_drv_probe(struct platform_device *pdev){	struct usb_hcd *hcd = NULL;	int ret;	pr_debug("In ehci_hcd_au1xxx_drv_probe\n");	if (usb_disabled())		return -ENODEV;	ret = usb_ehci_au1xxx_probe(&ehci_au1xxx_hc_driver, &hcd, pdev);	return ret;}static int ehci_hcd_au1xxx_drv_remove(struct platform_device *pdev){	struct usb_hcd *hcd = platform_get_drvdata(pdev);	usb_ehci_au1xxx_remove(hcd, pdev);	return 0;} /*TBD*//*static int ehci_hcd_au1xxx_drv_suspend(struct device *dev){	struct platform_device *pdev = to_platform_device(dev);	struct usb_hcd *hcd = dev_get_drvdata(dev);	return 0;}static int ehci_hcd_au1xxx_drv_resume(struct device *dev){	struct platform_device *pdev = to_platform_device(dev);	struct usb_hcd *hcd = dev_get_drvdata(dev);	return 0;}*/MODULE_ALIAS("au1xxx-ehci");static struct platform_driver ehci_hcd_au1xxx_driver = {	.probe = ehci_hcd_au1xxx_drv_probe,	.remove = ehci_hcd_au1xxx_drv_remove,	.shutdown = usb_hcd_platform_shutdown,	/*.suspend      = ehci_hcd_au1xxx_drv_suspend, */	/*.resume       = ehci_hcd_au1xxx_drv_resume, */	.driver = {		.name = "au1xxx-ehci",		.bus = &platform_bus_type	}};