drivers/usb/host/ohci-au1xxx.c - fp2-dev/kernel/msm - Gitiles

 /*
  * 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 __devinit
 ohci_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,
 #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,
 	},
 };

 MODULE_ALIAS("platform:au1xxx-ohci");
	/*
	* 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 __devinit
	ohci_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,
	#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,
	},
	};

	MODULE_ALIAS("platform:au1xxx-ohci");