drivers/usb/host/ehci-fsl.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright 2005-2009 MontaVista Software, Inc.
  * Copyright 2008,2012      Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
  * Free Software Foundation; either version 2 of the License, or (at your
  * option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software Foundation,
  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
  * by Hunter Wu.
  * Power Management support by Dave Liu <daveliu@freescale.com>,
  * Jerry Huang <Chang-Ming.Huang@freescale.com> and
  * Anton Vorontsov <avorontsov@ru.mvista.com>.
  */

 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/fsl_devices.h>

 #include "ehci-fsl.h"

 /* configure so an HC device and id are always provided */
 /* always called with process context; sleeping is OK */

 /**
  * usb_hcd_fsl_probe - initialize FSL-based HCDs
  * @drvier: Driver to be used for this HCD
  * @pdev: USB Host Controller being probed
  * Context: !in_interrupt()
  *
  * Allocates basic resources for this USB host controller.
  *
  */
 static int usb_hcd_fsl_probe(const struct hc_driver *driver,
 			     struct platform_device *pdev)
 {
 	struct fsl_usb2_platform_data *pdata;
 	struct usb_hcd *hcd;
 	struct resource *res;
 	int irq;
 	int retval;

 	pr_debug("initializing FSL-SOC USB Controller\n");

 	/* Need platform data for setup */
 	pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
 	if (!pdata) {
 		dev_err(&pdev->dev,
 			"No platform data for %s.\n", dev_name(&pdev->dev));
 		return -ENODEV;
 	}

 	/*
 	 * This is a host mode driver, verify that we're supposed to be
 	 * in host mode.
 	 */
 	if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 	      (pdata->operating_mode == FSL_USB2_MPH_HOST) ||
 	      (pdata->operating_mode == FSL_USB2_DR_OTG))) {
 		dev_err(&pdev->dev,
 			"Non Host Mode configured for %s. Wrong driver linked.\n",
 			dev_name(&pdev->dev));
 		return -ENODEV;
 	}

 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 	if (!res) {
 		dev_err(&pdev->dev,
 			"Found HC with no IRQ. Check %s setup!\n",
 			dev_name(&pdev->dev));
 		return -ENODEV;
 	}
 	irq = res->start;

 	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
 	if (!hcd) {
 		retval = -ENOMEM;
 		goto err1;
 	}

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(&pdev->dev,
 			"Found HC with no register addr. Check %s setup!\n",
 			dev_name(&pdev->dev));
 		retval = -ENODEV;
 		goto err2;
 	}
 	hcd->rsrc_start = res->start;
 	hcd->rsrc_len = resource_size(res);
 	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 				driver->description)) {
 		dev_dbg(&pdev->dev, "controller already in use\n");
 		retval = -EBUSY;
 		goto err2;
 	}
 	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);

 	if (hcd->regs == NULL) {
 		dev_dbg(&pdev->dev, "error mapping memory\n");
 		retval = -EFAULT;
 		goto err3;
 	}

 	pdata->regs = hcd->regs;

 	if (pdata->power_budget)
 		hcd->power_budget = pdata->power_budget;

 	/*
 	 * do platform specific init: check the clock, grab/config pins, etc.
 	 */
 	if (pdata->init && pdata->init(pdev)) {
 		retval = -ENODEV;
 		goto err4;
 	}

 	/* Enable USB controller, 83xx or 8536 */
 	if (pdata->have_sysif_regs)
 		setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);

 	/* Don't need to set host mode here. It will be done by tdi_reset() */

 	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 	if (retval != 0)
 		goto err4;

 #ifdef CONFIG_USB_OTG
 	if (pdata->operating_mode == FSL_USB2_DR_OTG) {
 		struct ehci_hcd *ehci = hcd_to_ehci(hcd);

 		hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
 		dev_dbg(&pdev->dev, "hcd=0x%p  ehci=0x%p, phy=0x%p\n",
 			hcd, ehci, hcd->phy);

 		if (!IS_ERR_OR_NULL(hcd->phy)) {
 			retval = otg_set_host(hcd->phy->otg,
 					      &ehci_to_hcd(ehci)->self);
 			if (retval) {
 				usb_put_phy(hcd->phy);
 				goto err4;
 			}
 		} else {
 			dev_err(&pdev->dev, "can't find phy\n");
 			retval = -ENODEV;
 			goto err4;
 		}
 	}
 #endif
 	return retval;

       err4:
 	iounmap(hcd->regs);
       err3:
 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
       err2:
 	usb_put_hcd(hcd);
       err1:
 	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
 	if (pdata->exit)
 		pdata->exit(pdev);
 	return retval;
 }

 /* may be called without controller electrically present */
 /* may be called with controller, bus, and devices active */

 /**
  * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
  * @dev: USB Host Controller being removed
  * Context: !in_interrupt()
  *
  * Reverses the effect of usb_hcd_fsl_probe().
  *
  */
 static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
 			       struct platform_device *pdev)
 {
 	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;

 	if (!IS_ERR_OR_NULL(hcd->phy)) {
 		otg_set_host(hcd->phy->otg, NULL);
 		usb_put_phy(hcd->phy);
 	}

 	usb_remove_hcd(hcd);

 	/*
 	 * do platform specific un-initialization:
 	 * release iomux pins, disable clock, etc.
 	 */
 	if (pdata->exit)
 		pdata->exit(pdev);
 	iounmap(hcd->regs);
 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 	usb_put_hcd(hcd);
 }

 static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
 			       enum fsl_usb2_phy_modes phy_mode,
 			       unsigned int port_offset)
 {
 	u32 portsc;
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	void __iomem *non_ehci = hcd->regs;
 	struct device *dev = hcd->self.controller;
 	struct fsl_usb2_platform_data *pdata = dev->platform_data;

 	if (pdata->controller_ver < 0) {
 		dev_warn(hcd->self.controller, "Could not get controller version\n");
 		return -ENODEV;
 	}

 	portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
 	portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);

 	switch (phy_mode) {
 	case FSL_USB2_PHY_ULPI:
 		if (pdata->have_sysif_regs && pdata->controller_ver) {
 			/* controller version 1.6 or above */
 			setbits32(non_ehci + FSL_SOC_USB_CTRL,
 					ULPI_PHY_CLK_SEL);
 			/*
 			 * Due to controller issue of PHY_CLK_VALID in ULPI
 			 * mode, we set USB_CTRL_USB_EN before checking
 			 * PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work.
 			 */
 			clrsetbits_be32(non_ehci + FSL_SOC_USB_CTRL,
 					UTMI_PHY_EN, USB_CTRL_USB_EN);
 		}
 		portsc |= PORT_PTS_ULPI;
 		break;
 	case FSL_USB2_PHY_SERIAL:
 		portsc |= PORT_PTS_SERIAL;
 		break;
 	case FSL_USB2_PHY_UTMI_WIDE:
 		portsc |= PORT_PTS_PTW;
 		/* fall through */
 	case FSL_USB2_PHY_UTMI:
 		if (pdata->have_sysif_regs && pdata->controller_ver) {
 			/* controller version 1.6 or above */
 			setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
 			mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
 						become stable - 10ms*/
 		}
 		/* enable UTMI PHY */
 		if (pdata->have_sysif_regs)
 			setbits32(non_ehci + FSL_SOC_USB_CTRL,
 				  CTRL_UTMI_PHY_EN);
 		portsc |= PORT_PTS_UTMI;
 		break;
 	case FSL_USB2_PHY_NONE:
 		break;
 	}

 	if (pdata->have_sysif_regs && pdata->controller_ver &&
 	    (phy_mode == FSL_USB2_PHY_ULPI)) {
 		/* check PHY_CLK_VALID to get phy clk valid */
 		if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
 				PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
 			printk(KERN_WARNING "fsl-ehci: USB PHY clock invalid\n");
 			return -EINVAL;
 		}
 	}

 	ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);

 	if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs)
 		setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);

 	return 0;
 }

 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 {
 	struct usb_hcd *hcd = ehci_to_hcd(ehci);
 	struct fsl_usb2_platform_data *pdata;
 	void __iomem *non_ehci = hcd->regs;

 	pdata = hcd->self.controller->platform_data;

 	if (pdata->have_sysif_regs) {
 		/*
 		* Turn on cache snooping hardware, since some PowerPC platforms
 		* wholly rely on hardware to deal with cache coherent
 		*/

 		/* Setup Snooping for all the 4GB space */
 		/* SNOOP1 starts from 0x0, size 2G */
 		out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
 		/* SNOOP2 starts from 0x80000000, size 2G */
 		out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
 	}

 	if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 			(pdata->operating_mode == FSL_USB2_DR_OTG))
 		if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 			return -EINVAL;

 	if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 		unsigned int chip, rev, svr;

 		svr = mfspr(SPRN_SVR);
 		chip = svr >> 16;
 		rev = (svr >> 4) & 0xf;

 		/* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 		if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 			ehci->has_fsl_port_bug = 1;

 		if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 			if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 				return -EINVAL;

 		if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 			if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
 				return -EINVAL;
 	}

 	if (pdata->have_sysif_regs) {
 #ifdef CONFIG_FSL_SOC_BOOKE
 		out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
 		out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
 #else
 		out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
 		out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
 #endif
 		out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
 	}

 	return 0;
 }

 /* called after powerup, by probe or system-pm "wakeup" */
 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 {
 	if (ehci_fsl_usb_setup(ehci))
 		return -EINVAL;

 	return 0;
 }

 /* called during probe() after chip reset completes */
 static int ehci_fsl_setup(struct usb_hcd *hcd)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	int retval;
 	struct fsl_usb2_platform_data *pdata;
 	struct device *dev;

 	dev = hcd->self.controller;
 	pdata = hcd->self.controller->platform_data;
 	ehci->big_endian_desc = pdata->big_endian_desc;
 	ehci->big_endian_mmio = pdata->big_endian_mmio;

 	/* EHCI registers start at offset 0x100 */
 	ehci->caps = hcd->regs + 0x100;

 	hcd->has_tt = 1;

 	retval = ehci_setup(hcd);
 	if (retval)
 		return retval;

 	if (of_device_is_compatible(dev->parent->of_node,
 				    "fsl,mpc5121-usb2-dr")) {
 		/*
 		 * set SBUSCFG:AHBBRST so that control msgs don't
 		 * fail when doing heavy PATA writes.
 		 */
 		ehci_writel(ehci, SBUSCFG_INCR8,
 			    hcd->regs + FSL_SOC_USB_SBUSCFG);
 	}

 	retval = ehci_fsl_reinit(ehci);
 	return retval;
 }

 struct ehci_fsl {
 	struct ehci_hcd	ehci;

 #ifdef CONFIG_PM
 	/* Saved USB PHY settings, need to restore after deep sleep. */
 	u32 usb_ctrl;
 #endif
 };

 #ifdef CONFIG_PM

 #ifdef CONFIG_PPC_MPC512x
 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	struct fsl_usb2_platform_data *pdata = dev->platform_data;
 	u32 tmp;

 #ifdef DEBUG
 	u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
 	mode &= USBMODE_CM_MASK;
 	tmp = ehci_readl(ehci, hcd->regs + 0x140);	/* usbcmd */

 	dev_dbg(dev, "suspend=%d already_suspended=%d "
 		"mode=%d  usbcmd %08x\n", pdata->suspended,
 		pdata->already_suspended, mode, tmp);
 #endif

 	/*
 	 * If the controller is already suspended, then this must be a
 	 * PM suspend.  Remember this fact, so that we will leave the
 	 * controller suspended at PM resume time.
 	 */
 	if (pdata->suspended) {
 		dev_dbg(dev, "already suspended, leaving early\n");
 		pdata->already_suspended = 1;
 		return 0;
 	}

 	dev_dbg(dev, "suspending...\n");

 	ehci->rh_state = EHCI_RH_SUSPENDED;
 	dev->power.power_state = PMSG_SUSPEND;

 	/* ignore non-host interrupts */
 	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

 	/* stop the controller */
 	tmp = ehci_readl(ehci, &ehci->regs->command);
 	tmp &= ~CMD_RUN;
 	ehci_writel(ehci, tmp, &ehci->regs->command);

 	/* save EHCI registers */
 	pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
 	pdata->pm_command &= ~CMD_RUN;
 	pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
 	pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
 	pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
 	pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
 	pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
 	pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
 	pdata->pm_configured_flag  =
 		ehci_readl(ehci, &ehci->regs->configured_flag);
 	pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
 	pdata->pm_usbgenctrl = ehci_readl(ehci,
 					  hcd->regs + FSL_SOC_USB_USBGENCTRL);

 	/* clear the W1C bits */
 	pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);

 	pdata->suspended = 1;

 	/* clear PP to cut power to the port */
 	tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
 	tmp &= ~PORT_POWER;
 	ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);

 	return 0;
 }

 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	struct fsl_usb2_platform_data *pdata = dev->platform_data;
 	u32 tmp;

 	dev_dbg(dev, "suspend=%d already_suspended=%d\n",
 		pdata->suspended, pdata->already_suspended);

 	/*
 	 * If the controller was already suspended at suspend time,
 	 * then don't resume it now.
 	 */
 	if (pdata->already_suspended) {
 		dev_dbg(dev, "already suspended, leaving early\n");
 		pdata->already_suspended = 0;
 		return 0;
 	}

 	if (!pdata->suspended) {
 		dev_dbg(dev, "not suspended, leaving early\n");
 		return 0;
 	}

 	pdata->suspended = 0;

 	dev_dbg(dev, "resuming...\n");

 	/* set host mode */
 	tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 	ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);

 	ehci_writel(ehci, pdata->pm_usbgenctrl,
 		    hcd->regs + FSL_SOC_USB_USBGENCTRL);
 	ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
 		    hcd->regs + FSL_SOC_USB_ISIPHYCTRL);

 	ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);

 	/* restore EHCI registers */
 	ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
 	ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
 	ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
 	ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
 	ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
 	ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
 	ehci_writel(ehci, pdata->pm_configured_flag,
 		    &ehci->regs->configured_flag);
 	ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);

 	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 	ehci->rh_state = EHCI_RH_RUNNING;
 	dev->power.power_state = PMSG_ON;

 	tmp = ehci_readl(ehci, &ehci->regs->command);
 	tmp |= CMD_RUN;
 	ehci_writel(ehci, tmp, &ehci->regs->command);

 	usb_hcd_resume_root_hub(hcd);

 	return 0;
 }
 #else
 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 {
 	return 0;
 }

 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 {
 	return 0;
 }
 #endif /* CONFIG_PPC_MPC512x */

 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);

 	return container_of(ehci, struct ehci_fsl, ehci);
 }

 static int ehci_fsl_drv_suspend(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 	void __iomem *non_ehci = hcd->regs;

 	if (of_device_is_compatible(dev->parent->of_node,
 				    "fsl,mpc5121-usb2-dr")) {
 		return ehci_fsl_mpc512x_drv_suspend(dev);
 	}

 	ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 			device_may_wakeup(dev));
 	if (!fsl_deep_sleep())
 		return 0;

 	ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 	return 0;
 }

 static int ehci_fsl_drv_resume(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	void __iomem *non_ehci = hcd->regs;

 	if (of_device_is_compatible(dev->parent->of_node,
 				    "fsl,mpc5121-usb2-dr")) {
 		return ehci_fsl_mpc512x_drv_resume(dev);
 	}

 	ehci_prepare_ports_for_controller_resume(ehci);
 	if (!fsl_deep_sleep())
 		return 0;

 	usb_root_hub_lost_power(hcd->self.root_hub);

 	/* Restore USB PHY settings and enable the controller. */
 	out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);

 	ehci_reset(ehci);
 	ehci_fsl_reinit(ehci);

 	return 0;
 }

 static int ehci_fsl_drv_restore(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);

 	usb_root_hub_lost_power(hcd->self.root_hub);
 	return 0;
 }

 static struct dev_pm_ops ehci_fsl_pm_ops = {
 	.suspend = ehci_fsl_drv_suspend,
 	.resume = ehci_fsl_drv_resume,
 	.restore = ehci_fsl_drv_restore,
 };

 #define EHCI_FSL_PM_OPS		(&ehci_fsl_pm_ops)
 #else
 #define EHCI_FSL_PM_OPS		NULL
 #endif /* CONFIG_PM */

 #ifdef CONFIG_USB_OTG
 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	u32 status;

 	if (!port)
 		return -EINVAL;

 	port--;

 	/* start port reset before HNP protocol time out */
 	status = readl(&ehci->regs->port_status[port]);
 	if (!(status & PORT_CONNECT))
 		return -ENODEV;

 	/* khubd will finish the reset later */
 	if (ehci_is_TDI(ehci)) {
 		writel(PORT_RESET |
 		       (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
 		       &ehci->regs->port_status[port]);
 	} else {
 		writel(PORT_RESET, &ehci->regs->port_status[port]);
 	}

 	return 0;
 }
 #else
 #define ehci_start_port_reset	NULL
 #endif /* CONFIG_USB_OTG */


 static const struct hc_driver ehci_fsl_hc_driver = {
 	.description = hcd_name,
 	.product_desc = "Freescale On-Chip EHCI Host Controller",
 	.hcd_priv_size = sizeof(struct ehci_fsl),

 	/*
 	 * generic hardware linkage
 	 */
 	.irq = ehci_irq,
 	.flags = HCD_USB2 | HCD_MEMORY,

 	/*
 	 * basic lifecycle operations
 	 */
 	.reset = ehci_fsl_setup,
 	.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,
 	.endpoint_reset = ehci_endpoint_reset,

 	/*
 	 * 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,
 	.start_port_reset = ehci_start_port_reset,
 	.relinquish_port = ehci_relinquish_port,
 	.port_handed_over = ehci_port_handed_over,

 	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 };

 static int ehci_fsl_drv_probe(struct platform_device *pdev)
 {
 	if (usb_disabled())
 		return -ENODEV;

 	/* FIXME we only want one one probe() not two */
 	return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 }

 static int ehci_fsl_drv_remove(struct platform_device *pdev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(pdev);

 	/* FIXME we only want one one remove() not two */
 	usb_hcd_fsl_remove(hcd, pdev);
 	return 0;
 }

 MODULE_ALIAS("platform:fsl-ehci");

 static struct platform_driver ehci_fsl_driver = {
 	.probe = ehci_fsl_drv_probe,
 	.remove = ehci_fsl_drv_remove,
 	.shutdown = usb_hcd_platform_shutdown,
 	.driver = {
 		.name = "fsl-ehci",
 		.pm = EHCI_FSL_PM_OPS,
 	},
 };
	/*
	* Copyright 2005-2009 MontaVista Software, Inc.
	* Copyright 2008,2012 Freescale Semiconductor, Inc.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2 of the License, or (at your
	* option) any later version.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software Foundation,
	* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	*
	* Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
	* by Hunter Wu.
	* Power Management support by Dave Liu <daveliu@freescale.com>,
	* Jerry Huang <Chang-Ming.Huang@freescale.com> and
	* Anton Vorontsov <avorontsov@ru.mvista.com>.
	*/

	#include <linux/kernel.h>
	#include <linux/types.h>
	#include <linux/delay.h>
	#include <linux/pm.h>
	#include <linux/err.h>
	#include <linux/platform_device.h>
	#include <linux/fsl_devices.h>

	#include "ehci-fsl.h"

	/* configure so an HC device and id are always provided */
	/* always called with process context; sleeping is OK */

	/**
	* usb_hcd_fsl_probe - initialize FSL-based HCDs
	* @drvier: Driver to be used for this HCD
	* @pdev: USB Host Controller being probed
	* Context: !in_interrupt()
	*
	* Allocates basic resources for this USB host controller.
	*
	*/
	static int usb_hcd_fsl_probe(const struct hc_driver *driver,
	struct platform_device *pdev)
	{
	struct fsl_usb2_platform_data *pdata;
	struct usb_hcd *hcd;
	struct resource *res;
	int irq;
	int retval;

	pr_debug("initializing FSL-SOC USB Controller\n");

	/* Need platform data for setup */
	pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
	if (!pdata) {
	dev_err(&pdev->dev,
	"No platform data for %s.\n", dev_name(&pdev->dev));
	return -ENODEV;
	}

	/*
	* This is a host mode driver, verify that we're supposed to be
	* in host mode.
	*/
	if (!((pdata->operating_mode == FSL_USB2_DR_HOST) \|\|
	(pdata->operating_mode == FSL_USB2_MPH_HOST) \|\|
	(pdata->operating_mode == FSL_USB2_DR_OTG))) {
	dev_err(&pdev->dev,
	"Non Host Mode configured for %s. Wrong driver linked.\n",
	dev_name(&pdev->dev));
	return -ENODEV;
	}

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res) {
	dev_err(&pdev->dev,
	"Found HC with no IRQ. Check %s setup!\n",
	dev_name(&pdev->dev));
	return -ENODEV;
	}
	irq = res->start;

	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
	retval = -ENOMEM;
	goto err1;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
	dev_err(&pdev->dev,
	"Found HC with no register addr. Check %s setup!\n",
	dev_name(&pdev->dev));
	retval = -ENODEV;
	goto err2;
	}
	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);
	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
	driver->description)) {
	dev_dbg(&pdev->dev, "controller already in use\n");
	retval = -EBUSY;
	goto err2;
	}
	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);

	if (hcd->regs == NULL) {
	dev_dbg(&pdev->dev, "error mapping memory\n");
	retval = -EFAULT;
	goto err3;
	}

	pdata->regs = hcd->regs;

	if (pdata->power_budget)
	hcd->power_budget = pdata->power_budget;

	/*
	* do platform specific init: check the clock, grab/config pins, etc.
	*/
	if (pdata->init && pdata->init(pdev)) {
	retval = -ENODEV;
	goto err4;
	}

	/* Enable USB controller, 83xx or 8536 */
	if (pdata->have_sysif_regs)
	setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);

	/* Don't need to set host mode here. It will be done by tdi_reset() */

	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (retval != 0)
	goto err4;

	#ifdef CONFIG_USB_OTG
	if (pdata->operating_mode == FSL_USB2_DR_OTG) {
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);

	hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
	dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, phy=0x%p\n",
	hcd, ehci, hcd->phy);

	if (!IS_ERR_OR_NULL(hcd->phy)) {
	retval = otg_set_host(hcd->phy->otg,
	&ehci_to_hcd(ehci)->self);
	if (retval) {
	usb_put_phy(hcd->phy);
	goto err4;
	}
	} else {
	dev_err(&pdev->dev, "can't find phy\n");
	retval = -ENODEV;
	goto err4;
	}
	}
	#endif
	return retval;

	err4:
	iounmap(hcd->regs);
	err3:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	err2:
	usb_put_hcd(hcd);
	err1:
	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
	if (pdata->exit)
	pdata->exit(pdev);
	return retval;
	}

	/* may be called without controller electrically present */
	/* may be called with controller, bus, and devices active */

	/**
	* usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
	* @dev: USB Host Controller being removed
	* Context: !in_interrupt()
	*
	* Reverses the effect of usb_hcd_fsl_probe().
	*
	*/
	static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
	struct platform_device *pdev)
	{
	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;

	if (!IS_ERR_OR_NULL(hcd->phy)) {
	otg_set_host(hcd->phy->otg, NULL);
	usb_put_phy(hcd->phy);
	}

	usb_remove_hcd(hcd);

	/*
	* do platform specific un-initialization:
	* release iomux pins, disable clock, etc.
	*/
	if (pdata->exit)
	pdata->exit(pdev);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	}

	static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
	enum fsl_usb2_phy_modes phy_mode,
	unsigned int port_offset)
	{
	u32 portsc;
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	void __iomem *non_ehci = hcd->regs;
	struct device *dev = hcd->self.controller;
	struct fsl_usb2_platform_data *pdata = dev->platform_data;

	if (pdata->controller_ver < 0) {
	dev_warn(hcd->self.controller, "Could not get controller version\n");
	return -ENODEV;
	}

	portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
	portsc &= ~(PORT_PTS_MSK \| PORT_PTS_PTW);

	switch (phy_mode) {
	case FSL_USB2_PHY_ULPI:
	if (pdata->have_sysif_regs && pdata->controller_ver) {
	/* controller version 1.6 or above */
	setbits32(non_ehci + FSL_SOC_USB_CTRL,
	ULPI_PHY_CLK_SEL);
	/*
	* Due to controller issue of PHY_CLK_VALID in ULPI
	* mode, we set USB_CTRL_USB_EN before checking
	* PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work.
	*/
	clrsetbits_be32(non_ehci + FSL_SOC_USB_CTRL,
	UTMI_PHY_EN, USB_CTRL_USB_EN);
	}
	portsc \|= PORT_PTS_ULPI;
	break;
	case FSL_USB2_PHY_SERIAL:
	portsc \|= PORT_PTS_SERIAL;
	break;
	case FSL_USB2_PHY_UTMI_WIDE:
	portsc \|= PORT_PTS_PTW;
	/* fall through */
	case FSL_USB2_PHY_UTMI:
	if (pdata->have_sysif_regs && pdata->controller_ver) {
	/* controller version 1.6 or above */
	setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
	mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI PHY CLK to
	become stable - 10ms*/
	}
	/* enable UTMI PHY */
	if (pdata->have_sysif_regs)
	setbits32(non_ehci + FSL_SOC_USB_CTRL,
	CTRL_UTMI_PHY_EN);
	portsc \|= PORT_PTS_UTMI;
	break;
	case FSL_USB2_PHY_NONE:
	break;
	}

	if (pdata->have_sysif_regs && pdata->controller_ver &&
	(phy_mode == FSL_USB2_PHY_ULPI)) {
	/* check PHY_CLK_VALID to get phy clk valid */
	if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
	PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
	printk(KERN_WARNING "fsl-ehci: USB PHY clock invalid\n");
	return -EINVAL;
	}
	}

	ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);

	if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs)
	setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);

	return 0;
	}

	static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
	{
	struct usb_hcd *hcd = ehci_to_hcd(ehci);
	struct fsl_usb2_platform_data *pdata;
	void __iomem *non_ehci = hcd->regs;

	pdata = hcd->self.controller->platform_data;

	if (pdata->have_sysif_regs) {
	/*
	* Turn on cache snooping hardware, since some PowerPC platforms
	* wholly rely on hardware to deal with cache coherent
	*/

	/* Setup Snooping for all the 4GB space */
	/* SNOOP1 starts from 0x0, size 2G */
	out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 \| SNOOP_SIZE_2GB);
	/* SNOOP2 starts from 0x80000000, size 2G */
	out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 \| SNOOP_SIZE_2GB);
	}

	if ((pdata->operating_mode == FSL_USB2_DR_HOST) \|\|
	(pdata->operating_mode == FSL_USB2_DR_OTG))
	if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
	return -EINVAL;

	if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
	unsigned int chip, rev, svr;

	svr = mfspr(SPRN_SVR);
	chip = svr >> 16;
	rev = (svr >> 4) & 0xf;

	/* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
	if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
	ehci->has_fsl_port_bug = 1;

	if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
	if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
	return -EINVAL;

	if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
	if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
	return -EINVAL;
	}

	if (pdata->have_sysif_regs) {
	#ifdef CONFIG_FSL_SOC_BOOKE
	out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
	out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
	#else
	out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
	out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
	#endif
	out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
	}

	return 0;
	}

	/* called after powerup, by probe or system-pm "wakeup" */
	static int ehci_fsl_reinit(struct ehci_hcd *ehci)
	{
	if (ehci_fsl_usb_setup(ehci))
	return -EINVAL;

	return 0;
	}

	/* called during probe() after chip reset completes */
	static int ehci_fsl_setup(struct usb_hcd *hcd)
	{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int retval;
	struct fsl_usb2_platform_data *pdata;
	struct device *dev;

	dev = hcd->self.controller;
	pdata = hcd->self.controller->platform_data;
	ehci->big_endian_desc = pdata->big_endian_desc;
	ehci->big_endian_mmio = pdata->big_endian_mmio;

	/* EHCI registers start at offset 0x100 */
	ehci->caps = hcd->regs + 0x100;

	hcd->has_tt = 1;

	retval = ehci_setup(hcd);
	if (retval)
	return retval;

	if (of_device_is_compatible(dev->parent->of_node,
	"fsl,mpc5121-usb2-dr")) {
	/*
	* set SBUSCFG:AHBBRST so that control msgs don't
	* fail when doing heavy PATA writes.
	*/
	ehci_writel(ehci, SBUSCFG_INCR8,
	hcd->regs + FSL_SOC_USB_SBUSCFG);
	}

	retval = ehci_fsl_reinit(ehci);
	return retval;
	}

	struct ehci_fsl {
	struct ehci_hcd ehci;

	#ifdef CONFIG_PM
	/* Saved USB PHY settings, need to restore after deep sleep. */
	u32 usb_ctrl;
	#endif
	};

	#ifdef CONFIG_PM

	#ifdef CONFIG_PPC_MPC512x
	static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
	{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	struct fsl_usb2_platform_data *pdata = dev->platform_data;
	u32 tmp;

	#ifdef DEBUG
	u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
	mode &= USBMODE_CM_MASK;
	tmp = ehci_readl(ehci, hcd->regs + 0x140); /* usbcmd */

	dev_dbg(dev, "suspend=%d already_suspended=%d "
	"mode=%d usbcmd %08x\n", pdata->suspended,
	pdata->already_suspended, mode, tmp);
	#endif

	/*
	* If the controller is already suspended, then this must be a
	* PM suspend. Remember this fact, so that we will leave the
	* controller suspended at PM resume time.
	*/
	if (pdata->suspended) {
	dev_dbg(dev, "already suspended, leaving early\n");
	pdata->already_suspended = 1;
	return 0;
	}

	dev_dbg(dev, "suspending...\n");

	ehci->rh_state = EHCI_RH_SUSPENDED;
	dev->power.power_state = PMSG_SUSPEND;

	/* ignore non-host interrupts */
	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

	/* stop the controller */
	tmp = ehci_readl(ehci, &ehci->regs->command);
	tmp &= ~CMD_RUN;
	ehci_writel(ehci, tmp, &ehci->regs->command);

	/* save EHCI registers */
	pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
	pdata->pm_command &= ~CMD_RUN;
	pdata->pm_status = ehci_readl(ehci, &ehci->regs->status);
	pdata->pm_intr_enable = ehci_readl(ehci, &ehci->regs->intr_enable);
	pdata->pm_frame_index = ehci_readl(ehci, &ehci->regs->frame_index);
	pdata->pm_segment = ehci_readl(ehci, &ehci->regs->segment);
	pdata->pm_frame_list = ehci_readl(ehci, &ehci->regs->frame_list);
	pdata->pm_async_next = ehci_readl(ehci, &ehci->regs->async_next);
	pdata->pm_configured_flag =
	ehci_readl(ehci, &ehci->regs->configured_flag);
	pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
	pdata->pm_usbgenctrl = ehci_readl(ehci,
	hcd->regs + FSL_SOC_USB_USBGENCTRL);

	/* clear the W1C bits */
	pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);

	pdata->suspended = 1;

	/* clear PP to cut power to the port */
	tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
	tmp &= ~PORT_POWER;
	ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);

	return 0;
	}

	static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
	{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	struct fsl_usb2_platform_data *pdata = dev->platform_data;
	u32 tmp;

	dev_dbg(dev, "suspend=%d already_suspended=%d\n",
	pdata->suspended, pdata->already_suspended);

	/*
	* If the controller was already suspended at suspend time,
	* then don't resume it now.
	*/
	if (pdata->already_suspended) {
	dev_dbg(dev, "already suspended, leaving early\n");
	pdata->already_suspended = 0;
	return 0;
	}

	if (!pdata->suspended) {
	dev_dbg(dev, "not suspended, leaving early\n");
	return 0;
	}

	pdata->suspended = 0;

	dev_dbg(dev, "resuming...\n");

	/* set host mode */
	tmp = USBMODE_CM_HOST \| (pdata->es ? USBMODE_ES : 0);
	ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);

	ehci_writel(ehci, pdata->pm_usbgenctrl,
	hcd->regs + FSL_SOC_USB_USBGENCTRL);
	ehci_writel(ehci, ISIPHYCTRL_PXE \| ISIPHYCTRL_PHYE,
	hcd->regs + FSL_SOC_USB_ISIPHYCTRL);

	ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);

	/* restore EHCI registers */
	ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
	ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
	ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
	ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
	ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
	ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
	ehci_writel(ehci, pdata->pm_configured_flag,
	&ehci->regs->configured_flag);
	ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);

	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
	ehci->rh_state = EHCI_RH_RUNNING;
	dev->power.power_state = PMSG_ON;

	tmp = ehci_readl(ehci, &ehci->regs->command);
	tmp \|= CMD_RUN;
	ehci_writel(ehci, tmp, &ehci->regs->command);

	usb_hcd_resume_root_hub(hcd);

	return 0;
	}
	#else
	static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
	{
	return 0;
	}

	static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
	{
	return 0;
	}
	#endif /* CONFIG_PPC_MPC512x */

	static struct ehci_fsl hcd_to_ehci_fsl(struct usb_hcd hcd)
	{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);

	return container_of(ehci, struct ehci_fsl, ehci);
	}

	static int ehci_fsl_drv_suspend(struct device *dev)
	{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
	void __iomem *non_ehci = hcd->regs;

	if (of_device_is_compatible(dev->parent->of_node,
	"fsl,mpc5121-usb2-dr")) {
	return ehci_fsl_mpc512x_drv_suspend(dev);
	}

	ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
	device_may_wakeup(dev));
	if (!fsl_deep_sleep())
	return 0;

	ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
	return 0;
	}

	static int ehci_fsl_drv_resume(struct device *dev)
	{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	void __iomem *non_ehci = hcd->regs;

	if (of_device_is_compatible(dev->parent->of_node,
	"fsl,mpc5121-usb2-dr")) {
	return ehci_fsl_mpc512x_drv_resume(dev);
	}

	ehci_prepare_ports_for_controller_resume(ehci);
	if (!fsl_deep_sleep())
	return 0;

	usb_root_hub_lost_power(hcd->self.root_hub);

	/* Restore USB PHY settings and enable the controller. */
	out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);

	ehci_reset(ehci);
	ehci_fsl_reinit(ehci);

	return 0;
	}

	static int ehci_fsl_drv_restore(struct device *dev)
	{
	struct usb_hcd *hcd = dev_get_drvdata(dev);

	usb_root_hub_lost_power(hcd->self.root_hub);
	return 0;
	}

	static struct dev_pm_ops ehci_fsl_pm_ops = {
	.suspend = ehci_fsl_drv_suspend,
	.resume = ehci_fsl_drv_resume,
	.restore = ehci_fsl_drv_restore,
	};

	#define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops)
	#else
	#define EHCI_FSL_PM_OPS NULL
	#endif /* CONFIG_PM */

	#ifdef CONFIG_USB_OTG
	static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
	{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	u32 status;

	if (!port)
	return -EINVAL;

	port--;

	/* start port reset before HNP protocol time out */
	status = readl(&ehci->regs->port_status[port]);
	if (!(status & PORT_CONNECT))
	return -ENODEV;

	/* khubd will finish the reset later */
	if (ehci_is_TDI(ehci)) {
	writel(PORT_RESET \|
	(status & ~(PORT_CSC \| PORT_PEC \| PORT_OCC)),
	&ehci->regs->port_status[port]);
	} else {
	writel(PORT_RESET, &ehci->regs->port_status[port]);
	}

	return 0;
	}
	#else
	#define ehci_start_port_reset NULL
	#endif /* CONFIG_USB_OTG */


	static const struct hc_driver ehci_fsl_hc_driver = {
	.description = hcd_name,
	.product_desc = "Freescale On-Chip EHCI Host Controller",
	.hcd_priv_size = sizeof(struct ehci_fsl),

	/*
	* generic hardware linkage
	*/
	.irq = ehci_irq,
	.flags = HCD_USB2 \| HCD_MEMORY,

	/*
	* basic lifecycle operations
	*/
	.reset = ehci_fsl_setup,
	.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,
	.endpoint_reset = ehci_endpoint_reset,

	/*
	* 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,
	.start_port_reset = ehci_start_port_reset,
	.relinquish_port = ehci_relinquish_port,
	.port_handed_over = ehci_port_handed_over,

	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
	};

	static int ehci_fsl_drv_probe(struct platform_device *pdev)
	{
	if (usb_disabled())
	return -ENODEV;

	/* FIXME we only want one one probe() not two */
	return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
	}

	static int ehci_fsl_drv_remove(struct platform_device *pdev)
	{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	/* FIXME we only want one one remove() not two */
	usb_hcd_fsl_remove(hcd, pdev);
	return 0;
	}

	MODULE_ALIAS("platform:fsl-ehci");

	static struct platform_driver ehci_fsl_driver = {
	.probe = ehci_fsl_drv_probe,
	.remove = ehci_fsl_drv_remove,
	.shutdown = usb_hcd_platform_shutdown,
	.driver = {
	.name = "fsl-ehci",
	.pm = EHCI_FSL_PM_OPS,
	},
	};