drivers/usb/host/ehci-pxa168.c - android_kernel_htc_msm8960 - Gitiles

 /*
  * drivers/usb/host/ehci-pxa168.c
  *
  * Tanmay Upadhyay <tanmay.upadhyay@einfochips.com>
  *
  * Based on drivers/usb/host/ehci-orion.c
  *
  * This file is licensed under  the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
  * warranty of any kind, whether express or implied.
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
 #include <mach/pxa168.h>

 #define USB_PHY_CTRL_REG 0x4
 #define USB_PHY_PLL_REG  0x8
 #define USB_PHY_TX_REG   0xc

 #define FBDIV_SHIFT      4

 #define ICP_SHIFT        12
 #define ICP_15            2
 #define ICP_20            3
 #define ICP_25            4

 #define KVCO_SHIFT       15

 #define PLLCALI12_SHIFT  25
 #define CALI12_VDD        0
 #define CALI12_09         1
 #define CALI12_10         2
 #define CALI12_11         3

 #define PLLVDD12_SHIFT   27
 #define VDD12_VDD         0
 #define VDD12_10          1
 #define VDD12_11          2
 #define VDD12_12          3

 #define PLLVDD18_SHIFT   29
 #define VDD18_19          0
 #define VDD18_20          1
 #define VDD18_21          2
 #define VDD18_22          3


 #define PLL_READY        (1 << 23)
 #define VCOCAL_START     (1 << 21)
 #define REG_RCAL_START   (1 << 12)

 struct pxa168_usb_drv_data {
 	struct ehci_hcd ehci;
 	struct clk	*pxa168_usb_clk;
 	struct resource	*usb_phy_res;
 	void __iomem	*usb_phy_reg_base;
 };

 static int ehci_pxa168_setup(struct usb_hcd *hcd)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	int retval;

 	ehci_reset(ehci);
 	retval = ehci_halt(ehci);
 	if (retval)
 		return retval;

 	/*
 	 * data structure init
 	 */
 	retval = ehci_init(hcd);
 	if (retval)
 		return retval;

 	hcd->has_tt = 1;

 	ehci_port_power(ehci, 0);

 	return retval;
 }

 static const struct hc_driver ehci_pxa168_hc_driver = {
 	.description = hcd_name,
 	.product_desc = "Marvell PXA168 EHCI",
 	.hcd_priv_size = sizeof(struct pxa168_usb_drv_data),

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

 	/*
 	 * basic lifecycle operations
 	 */
 	.reset = ehci_pxa168_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,
 	.relinquish_port = ehci_relinquish_port,
 	.port_handed_over = ehci_port_handed_over,

 	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 };

 static int pxa168_usb_phy_init(struct platform_device *pdev)
 {
 	struct resource *res;
 	void __iomem *usb_phy_reg_base;
 	struct pxa168_usb_pdata *pdata;
 	struct pxa168_usb_drv_data *drv_data;
 	struct usb_hcd *hcd = platform_get_drvdata(pdev);
 	unsigned long reg_val;
 	int pll_retry_cont = 10000, err = 0;

 	drv_data = (struct pxa168_usb_drv_data *)hcd->hcd_priv;
 	pdata = (struct pxa168_usb_pdata *)pdev->dev.platform_data;

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	if (!res) {
 		dev_err(&pdev->dev,
 			"Found HC with no PHY register addr. Check %s setup!\n",
 			dev_name(&pdev->dev));
 		return -ENODEV;
 	}

 	if (!request_mem_region(res->start, resource_size(res),
 				ehci_pxa168_hc_driver.description)) {
 		dev_dbg(&pdev->dev, "controller already in use\n");
 		return -EBUSY;
 	}

 	usb_phy_reg_base = ioremap(res->start, resource_size(res));
 	if (usb_phy_reg_base == NULL) {
 		dev_dbg(&pdev->dev, "error mapping memory\n");
 		err = -EFAULT;
 		goto err1;
 	}
 	drv_data->usb_phy_reg_base = usb_phy_reg_base;
 	drv_data->usb_phy_res = res;

 	/* If someone wants to init USB phy in board specific way */
 	if (pdata && pdata->phy_init)
 		return pdata->phy_init(usb_phy_reg_base);

 	/* Power up the PHY and PLL */
 	writel(readl(usb_phy_reg_base + USB_PHY_CTRL_REG) | 0x3,
 		usb_phy_reg_base + USB_PHY_CTRL_REG);

 	/* Configure PHY PLL */
 	reg_val = readl(usb_phy_reg_base + USB_PHY_PLL_REG) & ~(0x7e03ffff);
 	reg_val |= (VDD18_22 << PLLVDD18_SHIFT | VDD12_12 << PLLVDD12_SHIFT |
 		CALI12_11 << PLLCALI12_SHIFT | 3 << KVCO_SHIFT |
 		ICP_15 << ICP_SHIFT | 0xee << FBDIV_SHIFT | 0xb);
 	writel(reg_val, usb_phy_reg_base + USB_PHY_PLL_REG);

 	/* Make sure PHY PLL is ready */
 	while (!(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & PLL_READY)) {
 		if (!(pll_retry_cont--)) {
 			dev_dbg(&pdev->dev, "USB PHY PLL not ready\n");
 			err = -EIO;
 			goto err2;
 		}
 	}

 	/* Toggle VCOCAL_START bit of U2PLL for PLL calibration */
 	udelay(200);
 	writel(readl(usb_phy_reg_base + USB_PHY_PLL_REG) | VCOCAL_START,
 		usb_phy_reg_base + USB_PHY_PLL_REG);
 	udelay(40);
 	writel(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & ~VCOCAL_START,
 		usb_phy_reg_base + USB_PHY_PLL_REG);

 	/* Toggle REG_RCAL_START bit of U2PTX for impedance calibration */
 	udelay(400);
 	writel(readl(usb_phy_reg_base + USB_PHY_TX_REG) | REG_RCAL_START,
 		usb_phy_reg_base + USB_PHY_TX_REG);
 	udelay(40);
 	writel(readl(usb_phy_reg_base + USB_PHY_TX_REG) & ~REG_RCAL_START,
 		usb_phy_reg_base + USB_PHY_TX_REG);

 	/* Make sure PHY PLL is ready again */
 	pll_retry_cont = 0;
 	while (!(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & PLL_READY)) {
 		if (!(pll_retry_cont--)) {
 			dev_dbg(&pdev->dev, "USB PHY PLL not ready\n");
 			err = -EIO;
 			goto err2;
 		}
 	}

 	return 0;
 err2:
 	iounmap(usb_phy_reg_base);
 err1:
 	release_mem_region(res->start, resource_size(res));
 	return err;
 }

 static int __devinit ehci_pxa168_drv_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	struct usb_hcd *hcd;
 	struct ehci_hcd *ehci;
 	struct pxa168_usb_drv_data *drv_data;
 	void __iomem *regs;
 	int irq, err = 0;

 	if (usb_disabled())
 		return -ENODEV;

 	pr_debug("Initializing pxa168-SoC USB Host Controller\n");

 	irq = platform_get_irq(pdev, 0);
 	if (irq <= 0) {
 		dev_err(&pdev->dev,
 			"Found HC with no IRQ. Check %s setup!\n",
 			dev_name(&pdev->dev));
 		err = -ENODEV;
 		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));
 		err = -ENODEV;
 		goto err1;
 	}

 	if (!request_mem_region(res->start, resource_size(res),
 				ehci_pxa168_hc_driver.description)) {
 		dev_dbg(&pdev->dev, "controller already in use\n");
 		err = -EBUSY;
 		goto err1;
 	}

 	regs = ioremap(res->start, resource_size(res));
 	if (regs == NULL) {
 		dev_dbg(&pdev->dev, "error mapping memory\n");
 		err = -EFAULT;
 		goto err2;
 	}

 	hcd = usb_create_hcd(&ehci_pxa168_hc_driver,
 			&pdev->dev, dev_name(&pdev->dev));
 	if (!hcd) {
 		err = -ENOMEM;
 		goto err3;
 	}

 	drv_data = (struct pxa168_usb_drv_data *)hcd->hcd_priv;

 	/* Enable USB clock */
 	drv_data->pxa168_usb_clk = clk_get(&pdev->dev, "PXA168-USBCLK");
 	if (IS_ERR(drv_data->pxa168_usb_clk)) {
 		dev_err(&pdev->dev, "Couldn't get USB clock\n");
 		err = PTR_ERR(drv_data->pxa168_usb_clk);
 		goto err4;
 	}
 	clk_enable(drv_data->pxa168_usb_clk);

 	err = pxa168_usb_phy_init(pdev);
 	if (err) {
 		dev_err(&pdev->dev, "USB PHY initialization failed\n");
 		goto err5;
 	}

 	hcd->rsrc_start = res->start;
 	hcd->rsrc_len = resource_size(res);
 	hcd->regs = regs;

 	ehci = hcd_to_ehci(hcd);
 	ehci->caps = hcd->regs + 0x100;
 	ehci->regs = hcd->regs + 0x100 +
 		HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 	hcd->has_tt = 1;
 	ehci->sbrn = 0x20;

 	err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
 	if (err)
 		goto err5;

 	return 0;

 err5:
 	clk_disable(drv_data->pxa168_usb_clk);
 	clk_put(drv_data->pxa168_usb_clk);
 err4:
 	usb_put_hcd(hcd);
 err3:
 	iounmap(regs);
 err2:
 	release_mem_region(res->start, resource_size(res));
 err1:
 	dev_err(&pdev->dev, "init %s fail, %d\n",
 		dev_name(&pdev->dev), err);

 	return err;
 }

 static int __exit ehci_pxa168_drv_remove(struct platform_device *pdev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(pdev);
 	struct pxa168_usb_drv_data *drv_data =
 		(struct pxa168_usb_drv_data *)hcd->hcd_priv;

 	usb_remove_hcd(hcd);

 	/* Power down PHY & PLL */
 	writel(readl(drv_data->usb_phy_reg_base + USB_PHY_CTRL_REG) & (~0x3),
 		drv_data->usb_phy_reg_base + USB_PHY_CTRL_REG);

 	clk_disable(drv_data->pxa168_usb_clk);
 	clk_put(drv_data->pxa168_usb_clk);

 	iounmap(hcd->regs);
 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

 	iounmap(drv_data->usb_phy_reg_base);
 	release_mem_region(drv_data->usb_phy_res->start,
 			resource_size(drv_data->usb_phy_res));

 	usb_put_hcd(hcd);

 	return 0;
 }

 MODULE_ALIAS("platform:pxa168-ehci");

 static struct platform_driver ehci_pxa168_driver = {
 	.probe		= ehci_pxa168_drv_probe,
 	.remove		= __exit_p(ehci_pxa168_drv_remove),
 	.shutdown	= usb_hcd_platform_shutdown,
 	.driver.name	= "pxa168-ehci",
 };
	/*
	* drivers/usb/host/ehci-pxa168.c
	*
	* Tanmay Upadhyay <tanmay.upadhyay@einfochips.com>
	*
	* Based on drivers/usb/host/ehci-orion.c
	*
	* This file is licensed under the terms of the GNU General Public
	* License version 2. This program is licensed "as is" without any
	* warranty of any kind, whether express or implied.
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/clk.h>
	#include <mach/pxa168.h>

	#define USB_PHY_CTRL_REG 0x4
	#define USB_PHY_PLL_REG 0x8
	#define USB_PHY_TX_REG 0xc

	#define FBDIV_SHIFT 4

	#define ICP_SHIFT 12
	#define ICP_15 2
	#define ICP_20 3
	#define ICP_25 4

	#define KVCO_SHIFT 15

	#define PLLCALI12_SHIFT 25
	#define CALI12_VDD 0
	#define CALI12_09 1
	#define CALI12_10 2
	#define CALI12_11 3

	#define PLLVDD12_SHIFT 27
	#define VDD12_VDD 0
	#define VDD12_10 1
	#define VDD12_11 2
	#define VDD12_12 3

	#define PLLVDD18_SHIFT 29
	#define VDD18_19 0
	#define VDD18_20 1
	#define VDD18_21 2
	#define VDD18_22 3


	#define PLL_READY (1 << 23)
	#define VCOCAL_START (1 << 21)
	#define REG_RCAL_START (1 << 12)

	struct pxa168_usb_drv_data {
	struct ehci_hcd ehci;
	struct clk *pxa168_usb_clk;
	struct resource *usb_phy_res;
	void __iomem *usb_phy_reg_base;
	};

	static int ehci_pxa168_setup(struct usb_hcd *hcd)
	{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int retval;

	ehci_reset(ehci);
	retval = ehci_halt(ehci);
	if (retval)
	return retval;

	/*
	* data structure init
	*/
	retval = ehci_init(hcd);
	if (retval)
	return retval;

	hcd->has_tt = 1;

	ehci_port_power(ehci, 0);

	return retval;
	}

	static const struct hc_driver ehci_pxa168_hc_driver = {
	.description = hcd_name,
	.product_desc = "Marvell PXA168 EHCI",
	.hcd_priv_size = sizeof(struct pxa168_usb_drv_data),

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

	/*
	* basic lifecycle operations
	*/
	.reset = ehci_pxa168_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,
	.relinquish_port = ehci_relinquish_port,
	.port_handed_over = ehci_port_handed_over,

	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
	};

	static int pxa168_usb_phy_init(struct platform_device *pdev)
	{
	struct resource *res;
	void __iomem *usb_phy_reg_base;
	struct pxa168_usb_pdata *pdata;
	struct pxa168_usb_drv_data *drv_data;
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	unsigned long reg_val;
	int pll_retry_cont = 10000, err = 0;

	drv_data = (struct pxa168_usb_drv_data *)hcd->hcd_priv;
	pdata = (struct pxa168_usb_pdata *)pdev->dev.platform_data;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!res) {
	dev_err(&pdev->dev,
	"Found HC with no PHY register addr. Check %s setup!\n",
	dev_name(&pdev->dev));
	return -ENODEV;
	}

	if (!request_mem_region(res->start, resource_size(res),
	ehci_pxa168_hc_driver.description)) {
	dev_dbg(&pdev->dev, "controller already in use\n");
	return -EBUSY;
	}

	usb_phy_reg_base = ioremap(res->start, resource_size(res));
	if (usb_phy_reg_base == NULL) {
	dev_dbg(&pdev->dev, "error mapping memory\n");
	err = -EFAULT;
	goto err1;
	}
	drv_data->usb_phy_reg_base = usb_phy_reg_base;
	drv_data->usb_phy_res = res;

	/* If someone wants to init USB phy in board specific way */
	if (pdata && pdata->phy_init)
	return pdata->phy_init(usb_phy_reg_base);

	/* Power up the PHY and PLL */
	writel(readl(usb_phy_reg_base + USB_PHY_CTRL_REG) \| 0x3,
	usb_phy_reg_base + USB_PHY_CTRL_REG);

	/* Configure PHY PLL */
	reg_val = readl(usb_phy_reg_base + USB_PHY_PLL_REG) & ~(0x7e03ffff);
	reg_val \|= (VDD18_22 << PLLVDD18_SHIFT \| VDD12_12 << PLLVDD12_SHIFT \|
	CALI12_11 << PLLCALI12_SHIFT \| 3 << KVCO_SHIFT \|
	ICP_15 << ICP_SHIFT \| 0xee << FBDIV_SHIFT \| 0xb);
	writel(reg_val, usb_phy_reg_base + USB_PHY_PLL_REG);

	/* Make sure PHY PLL is ready */
	while (!(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & PLL_READY)) {
	if (!(pll_retry_cont--)) {
	dev_dbg(&pdev->dev, "USB PHY PLL not ready\n");
	err = -EIO;
	goto err2;
	}
	}

	/* Toggle VCOCAL_START bit of U2PLL for PLL calibration */
	udelay(200);
	writel(readl(usb_phy_reg_base + USB_PHY_PLL_REG) \| VCOCAL_START,
	usb_phy_reg_base + USB_PHY_PLL_REG);
	udelay(40);
	writel(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & ~VCOCAL_START,
	usb_phy_reg_base + USB_PHY_PLL_REG);

	/* Toggle REG_RCAL_START bit of U2PTX for impedance calibration */
	udelay(400);
	writel(readl(usb_phy_reg_base + USB_PHY_TX_REG) \| REG_RCAL_START,
	usb_phy_reg_base + USB_PHY_TX_REG);
	udelay(40);
	writel(readl(usb_phy_reg_base + USB_PHY_TX_REG) & ~REG_RCAL_START,
	usb_phy_reg_base + USB_PHY_TX_REG);

	/* Make sure PHY PLL is ready again */
	pll_retry_cont = 0;
	while (!(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & PLL_READY)) {
	if (!(pll_retry_cont--)) {
	dev_dbg(&pdev->dev, "USB PHY PLL not ready\n");
	err = -EIO;
	goto err2;
	}
	}

	return 0;
	err2:
	iounmap(usb_phy_reg_base);
	err1:
	release_mem_region(res->start, resource_size(res));
	return err;
	}

	static int __devinit ehci_pxa168_drv_probe(struct platform_device *pdev)
	{
	struct resource *res;
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	struct pxa168_usb_drv_data *drv_data;
	void __iomem *regs;
	int irq, err = 0;

	if (usb_disabled())
	return -ENODEV;

	pr_debug("Initializing pxa168-SoC USB Host Controller\n");

	irq = platform_get_irq(pdev, 0);
	if (irq <= 0) {
	dev_err(&pdev->dev,
	"Found HC with no IRQ. Check %s setup!\n",
	dev_name(&pdev->dev));
	err = -ENODEV;
	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));
	err = -ENODEV;
	goto err1;
	}

	if (!request_mem_region(res->start, resource_size(res),
	ehci_pxa168_hc_driver.description)) {
	dev_dbg(&pdev->dev, "controller already in use\n");
	err = -EBUSY;
	goto err1;
	}

	regs = ioremap(res->start, resource_size(res));
	if (regs == NULL) {
	dev_dbg(&pdev->dev, "error mapping memory\n");
	err = -EFAULT;
	goto err2;
	}

	hcd = usb_create_hcd(&ehci_pxa168_hc_driver,
	&pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
	err = -ENOMEM;
	goto err3;
	}

	drv_data = (struct pxa168_usb_drv_data *)hcd->hcd_priv;

	/* Enable USB clock */
	drv_data->pxa168_usb_clk = clk_get(&pdev->dev, "PXA168-USBCLK");
	if (IS_ERR(drv_data->pxa168_usb_clk)) {
	dev_err(&pdev->dev, "Couldn't get USB clock\n");
	err = PTR_ERR(drv_data->pxa168_usb_clk);
	goto err4;
	}
	clk_enable(drv_data->pxa168_usb_clk);

	err = pxa168_usb_phy_init(pdev);
	if (err) {
	dev_err(&pdev->dev, "USB PHY initialization failed\n");
	goto err5;
	}

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);
	hcd->regs = regs;

	ehci = hcd_to_ehci(hcd);
	ehci->caps = hcd->regs + 0x100;
	ehci->regs = hcd->regs + 0x100 +
	HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
	hcd->has_tt = 1;
	ehci->sbrn = 0x20;

	err = usb_add_hcd(hcd, irq, IRQF_SHARED \| IRQF_DISABLED);
	if (err)
	goto err5;

	return 0;

	err5:
	clk_disable(drv_data->pxa168_usb_clk);
	clk_put(drv_data->pxa168_usb_clk);
	err4:
	usb_put_hcd(hcd);
	err3:
	iounmap(regs);
	err2:
	release_mem_region(res->start, resource_size(res));
	err1:
	dev_err(&pdev->dev, "init %s fail, %d\n",
	dev_name(&pdev->dev), err);

	return err;
	}

	static int __exit ehci_pxa168_drv_remove(struct platform_device *pdev)
	{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct pxa168_usb_drv_data *drv_data =
	(struct pxa168_usb_drv_data *)hcd->hcd_priv;

	usb_remove_hcd(hcd);

	/* Power down PHY & PLL */
	writel(readl(drv_data->usb_phy_reg_base + USB_PHY_CTRL_REG) & (~0x3),
	drv_data->usb_phy_reg_base + USB_PHY_CTRL_REG);

	clk_disable(drv_data->pxa168_usb_clk);
	clk_put(drv_data->pxa168_usb_clk);

	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

	iounmap(drv_data->usb_phy_reg_base);
	release_mem_region(drv_data->usb_phy_res->start,
	resource_size(drv_data->usb_phy_res));

	usb_put_hcd(hcd);

	return 0;
	}

	MODULE_ALIAS("platform:pxa168-ehci");

	static struct platform_driver ehci_pxa168_driver = {
	.probe = ehci_pxa168_drv_probe,
	.remove = __exit_p(ehci_pxa168_drv_remove),
	.shutdown = usb_hcd_platform_shutdown,
	.driver.name = "pxa168-ehci",
	};