ENGR00117389 Port 5.0.0 release to 2.6.31

This is i.MX BSP 5.0.0 release ported to 2.6.31

Signed-off-by: Rob Herring <r.herring@freescale.com>
Signed-off-by: Alan Tull <r80115@freescale.com>
Signed-off-by: Xinyu Chen <xinyu.chen@freescale.com>

1 files changed, 860 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/usb_common.c b/arch/arm/plat-mxc/usb_common.c
new file mode 100644
index 000000000000..a1f53fd9f3be
--- /dev/null
+++ b/arch/arm/plat-mxc/usb_common.c
@@ -0,0 +1,860 @@
+/*
+ * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ *	otg_{get,set}_transceiver() are from arm/plat-omap/usb.c.
+ *	which is Copyright (C) 2004 Texas Instruments, Inc.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*!
+ *@defgroup USB ARC OTG USB Driver
+ */
+
+/*!
+ * @file usb_common.c
+ *
+ * @brief platform related part of usb driver.
+ * @ingroup USB
+ */
+
+/*!
+ *Include files
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/fsl_devices.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/fsl_xcvr.h>
+#include <linux/regulator/consumer.h>
+#include <mach/arc_otg.h>
+#include <mach/hardware.h>
+#include <asm/mach-types.h>
+
+#define MXC_NUMBER_USB_TRANSCEIVER 6
+struct fsl_xcvr_ops *g_xc_ops[MXC_NUMBER_USB_TRANSCEIVER] = { NULL };
+
+static struct clk *usb_clk;
+static struct clk *usb_ahb_clk;
+
+extern int gpio_usbotg_hs_active(void);
+extern int gpio_usbotg_hs_inactive(void);
+
+/*
+ * make sure USB_CLK is running at 60 MHz +/- 1000 Hz
+ */
+static int fsl_check_usbclk(void)
+{
+	unsigned long freq;
+
+	usb_ahb_clk = clk_get(NULL, "usb_ahb_clk");
+	if (clk_enable(usb_ahb_clk)) {
+		printk(KERN_ERR "clk_enable(usb_ahb_clk) failed\n");
+		return -EINVAL;
+	}
+	clk_put(usb_ahb_clk);
+
+	usb_clk = clk_get(NULL, "usb_clk");
+	freq = clk_get_rate(usb_clk);
+	clk_put(usb_clk);
+	if ((freq < 59999000) || (freq > 60001000)) {
+		printk(KERN_ERR "USB_CLK=%lu, should be 60MHz\n", freq);
+		return -1;
+	}
+
+	return 0;
+}
+
+void fsl_usb_xcvr_register(struct fsl_xcvr_ops *xcvr_ops)
+{
+	int i;
+
+	pr_debug("%s\n", __func__);
+	for (i = 0; i < MXC_NUMBER_USB_TRANSCEIVER; i++) {
+		if (g_xc_ops[i] == NULL) {
+			g_xc_ops[i] = xcvr_ops;
+			return;
+		}
+	}
+
+	pr_debug("Failed %s\n", __func__);
+}
+EXPORT_SYMBOL(fsl_usb_xcvr_register);
+
+void fsl_platform_set_test_mode (struct fsl_usb2_platform_data *pdata, enum usb_test_mode mode)
+{
+	if (pdata->xcvr_ops && pdata->xcvr_ops->set_test_mode)
+		pdata->xcvr_ops->set_test_mode((u32 *)(pdata->regs + ULPIVW_OFF), mode);
+}
+EXPORT_SYMBOL(fsl_platform_set_test_mode);
+
+void fsl_usb_xcvr_unregister(struct fsl_xcvr_ops *xcvr_ops)
+{
+	int i;
+
+	pr_debug("%s\n", __func__);
+	for (i = 0; i < MXC_NUMBER_USB_TRANSCEIVER; i++) {
+		if (g_xc_ops[i] == xcvr_ops) {
+			g_xc_ops[i] = NULL;
+			return;
+		}
+	}
+
+	pr_debug("Failed %s\n", __func__);
+}
+EXPORT_SYMBOL(fsl_usb_xcvr_unregister);
+
+static struct fsl_xcvr_ops *fsl_usb_get_xcvr(char *name)
+{
+	int i;
+
+	pr_debug("%s\n", __func__);
+	if (name == NULL) {
+		printk(KERN_ERR "get_xcvr(): No tranceiver name\n");
+		return NULL;
+	}
+
+	for (i = 0; i < MXC_NUMBER_USB_TRANSCEIVER; i++) {
+		if (strcmp(g_xc_ops[i]->name, name) == 0) {
+			return g_xc_ops[i];
+		}
+	}
+	pr_debug("Failed %s\n", __func__);
+	return NULL;
+}
+
+/* The dmamask must be set for EHCI to work */
+static u64 ehci_dmamask = ~(u32) 0;
+
+/*!
+ * Register an instance of a USB host platform device.
+ *
+ * @param	res:	resource pointer
+ * @param       n_res:	number of resources
+ * @param       config: config pointer
+ *
+ * @return      newly-registered platform_device
+ *
+ * The USB controller supports 3 host interfaces, and the
+ * kernel can be configured to support some number of them.
+ * Each supported host interface is registered as an instance
+ * of the "fsl-ehci" device.  Call this function multiple times
+ * to register each host interface.
+ */
+static int instance_id = 0;
+struct platform_device *host_pdev_register(struct resource *res, int n_res,
+					   struct fsl_usb2_platform_data *config)
+{
+	struct platform_device *pdev;
+	int rc;
+
+	pr_debug("register host res=0x%p, size=%d\n", res, n_res);
+
+	pdev = platform_device_register_simple("fsl-ehci",
+					       instance_id, res, n_res);
+	if (IS_ERR(pdev)) {
+		pr_debug("can't register %s Host, %ld\n",
+			 config->name, PTR_ERR(pdev));
+		return NULL;
+	}
+
+	pdev->dev.coherent_dma_mask = 0xffffffff;
+	pdev->dev.dma_mask = &ehci_dmamask;
+
+	/*
+	 * platform_device_add_data() makes a copy of
+	 * the platform_data passed in.  That makes it
+	 * impossible to share the same config struct for
+	 * all OTG devices (host,gadget,otg).  So, just
+	 * set the platorm_data pointer ourselves.
+	 */
+	rc = platform_device_add_data(pdev, config,
+				      sizeof(struct fsl_usb2_platform_data));
+	if (rc) {
+		platform_device_unregister(pdev);
+		return NULL;
+	}
+
+	printk(KERN_INFO "usb: %s host (%s) registered\n", config->name,
+	       config->transceiver);
+	pr_debug("pdev=0x%p  dev=0x%p  resources=0x%p  pdata=0x%p\n",
+		 pdev, &pdev->dev, pdev->resource, pdev->dev.platform_data);
+
+	instance_id++;
+
+	return pdev;
+}
+
+#if defined(CONFIG_USB_OTG)
+static struct otg_transceiver *xceiv;
+
+/**
+ * otg_get_transceiver - find the (single) OTG transceiver driver
+ *
+ * Returns the transceiver driver, after getting a refcount to it; or
+ * null if there is no such transceiver.  The caller is responsible for
+ * releasing that count.
+ */
+struct otg_transceiver *otg_get_transceiver(void)
+{
+	pr_debug("%s xceiv=0x%p\n", __func__, xceiv);
+	if (xceiv)
+		get_device(xceiv->dev);
+	return xceiv;
+}
+EXPORT_SYMBOL(otg_get_transceiver);
+
+int otg_set_transceiver(struct otg_transceiver *x)
+{
+	pr_debug("%s xceiv=0x%p  x=0x%p\n", __func__, xceiv, x);
+	if (xceiv && x)
+		return -EBUSY;
+	xceiv = x;
+	return 0;
+}
+EXPORT_SYMBOL(otg_set_transceiver);
+
+static struct resource *otg_resources;
+
+struct resource *otg_get_resources(void)
+{
+	return otg_resources;
+}
+EXPORT_SYMBOL(otg_get_resources);
+
+int otg_set_resources(struct resource *resources)
+{
+	otg_resources = resources;
+	return 0;
+}
+EXPORT_SYMBOL(otg_set_resources);
+#endif
+
+static void usbh1_set_serial_xcvr(void)
+{
+	pr_debug("%s: \n", __func__);
+	USBCTRL &= ~(UCTRL_H1SIC_MASK | UCTRL_BPE); /* disable bypass mode */
+	USBCTRL |= UCTRL_H1SIC_SU6 |		/* single-ended / unidir. */
+		   UCTRL_H1WIE | UCTRL_H1DT |	/* disable H1 TLL */
+		   UCTRL_H1PM;			/* power mask */
+}
+
+static void usbh1_set_ulpi_xcvr(void)
+{
+	pr_debug("%s: \n", __func__);
+
+	/* Stop then Reset */
+	UH1_USBCMD &= ~UCMD_RUN_STOP;
+	while (UH1_USBCMD & UCMD_RUN_STOP) ;
+
+	UH1_USBCMD |= UCMD_RESET;
+	while (UH1_USBCMD & UCMD_RESET) ;
+
+	/* Select the clock from external PHY */
+	USB_CTRL_1 |= USB_CTRL_UH1_EXT_CLK_EN;
+
+	/* select ULPI PHY PTS=2 */
+	UH1_PORTSC1 = (UH1_PORTSC1 & ~PORTSC_PTS_MASK) | PORTSC_PTS_ULPI;
+
+	USBCTRL |= UCTRL_H1WIE; /* HOST1 wakeup intr enable */
+	USBCTRL |= UCTRL_H1UIE; /* Host1 ULPI interrupt enable */
+	USBCTRL &= ~UCTRL_H1PM; /* HOST1 power mask */
+
+	/* Interrupt Threshold Control:Immediate (no threshold) */
+	UH1_USBCMD &= UCMD_ITC_NO_THRESHOLD;
+
+	UH1_USBCMD |= UCMD_RESET;       /* reset the controller */
+
+	/* allow controller to reset, and leave time for
+	* the ULPI transceiver to reset too.
+	*/
+	msleep(100);
+
+	/* Turn off the usbpll for ulpi tranceivers */
+	clk_disable(usb_clk);
+}
+static void usbh2_set_ulpi_xcvr(void)
+{
+	u32 tmp;
+
+	pr_debug("%s\n", __func__);
+	USBCTRL &= ~(UCTRL_H2SIC_MASK | UCTRL_BPE);
+	USBCTRL |= UCTRL_H2WIE |	/* wakeup intr enable */
+		   UCTRL_H2UIE |	/* ULPI intr enable */
+		   UCTRL_H2DT |		/* disable H2 TLL */
+		   UCTRL_H2PM;		/* power mask */
+
+	/* must set ULPI phy before turning off clock */
+	tmp = UH2_PORTSC1 & ~PORTSC_PTS_MASK;
+	tmp |= PORTSC_PTS_ULPI;
+	UH2_PORTSC1 = tmp;
+
+	UH2_USBCMD |= UCMD_RESET;	/* reset the controller */
+
+	/* allow controller to reset, and leave time for
+	 * the ULPI transceiver to reset too.
+	 */
+	msleep(100);
+
+	/* Turn off the usbpll for ulpi tranceivers */
+	clk_disable(usb_clk);
+}
+
+static void usbh2_set_serial_xcvr(void)
+{
+	pr_debug("%s: \n", __func__);
+
+	/* Stop then Reset */
+	UH2_USBCMD &= ~UCMD_RUN_STOP;
+	while (UH2_USBCMD & UCMD_RUN_STOP) ;
+
+	UH2_USBCMD |= UCMD_RESET;
+	while (UH2_USBCMD & UCMD_RESET) ;
+
+	USBCTRL &= ~(UCTRL_H2SIC_MASK);	/* Disable bypass mode */
+	USBCTRL &= ~(UCTRL_H2PM);	/* Power Mask */
+	USBCTRL &= ~UCTRL_H2OCPOL;	/* OverCurrent Polarity is Low Active */
+	USBCTRL &= ~UCTRL_H2WIE;	/* Wakeup intr disable */
+	USBCTRL |= UCTRL_IP_PUE_DOWN |	/* ipp_pue_pulldwn_dpdm */
+	    UCTRL_USBTE |	/* USBT is enabled */
+	    UCTRL_H2DT;		/* Disable H2 TLL */
+
+	if (cpu_is_mx35_rev(CHIP_REV_2_0) < 0) {
+		/* Disable Host2 bus Lock for i.MX35 1.0 */
+		USBCTRL |= UCTRL_H2LOCKD;
+		/* USBOTG_PWR low active */
+		USBCTRL &= ~UCTRL_PP;
+		/* OverCurrent Polarity is Low Active */
+		USBCTRL &= ~UCTRL_OCPOL;
+	} else if (cpu_is_mx35_rev(CHIP_REV_2_0) >= 1) {
+		/* i.MX35 2.0 OTG and Host2 have seperate OC/PWR polarity */
+		USBCTRL &= ~UCTRL_H2PP;
+		USBCTRL &= ~UCTRL_H2OCPOL;
+	} else if (cpu_is_mx25()) {
+		/*
+		 * USBH2_PWR and USBH2_OC are active high.
+		 * Must force xcvr clock to "internal" so that
+		 * we can write to PTS field after it's been
+		 * cleared by ehci_turn_off_all_ports().
+		 */
+		USBCTRL |= UCTRL_H2PP | UCTRL_H2OCPOL | UCTRL_XCSH2;
+		/* Disable Host2 bus Lock */
+		USBCTRL |= UCTRL_H2LOCKD;
+	}
+
+	USBCTRL &= ~(UCTRL_PP);
+	UH2_PORTSC1 = (UH2_PORTSC1 & (~PORTSC_PTS_MASK)) | PORTSC_PTS_SERIAL;
+
+	if (UH2_HCSPARAMS & HCSPARAMS_PPC)
+		UH2_PORTSC1 |= PORTSC_PORT_POWER;
+
+	/* Reset controller before set host mode */
+	UH2_USBCMD |= UCMD_RESET;
+	while (UH2_USBCMD & UCMD_RESET) ;
+
+	msleep(100);
+}
+
+/*!
+ * Register remote wakeup by this usb controller
+ *
+ * @param pdev: platform_device for this usb controller
+ *
+ * @return 0 or negative error code in case not supportted.
+ */
+static int usb_register_remote_wakeup(struct platform_device *pdev)
+{
+	struct resource *res;
+	int irq;
+
+	pr_debug("%s: pdev=0x%p \n", __func__, pdev);
+	if (!cpu_is_mx51())
+		return -ECANCELED;
+
+	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;
+	pdev->dev.power.can_wakeup = 1;
+	enable_irq_wake(irq);
+
+	return 0;
+}
+
+extern void gpio_usbh1_setback_stp(void);
+extern void gpio_usbh2_setback_stp(void);
+
+int fsl_usb_host_init(struct platform_device *pdev)
+{
+	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
+	struct fsl_xcvr_ops *xops;
+
+	pr_debug("%s: pdev=0x%p  pdata=0x%p\n", __func__, pdev, pdata);
+
+	xops = fsl_usb_get_xcvr(pdata->transceiver);
+	if (!xops) {
+		printk(KERN_ERR "%s transceiver ops missing\n", pdata->name);
+		return -EINVAL;
+	}
+	pdata->xcvr_ops = xops;
+	pdata->xcvr_type = xops->xcvr_type;
+	pdata->pdev = pdev;
+
+	if (fsl_check_usbclk() != 0)
+		return -EINVAL;
+
+	pr_debug("%s: grab pins\n", __func__);
+	if (pdata->gpio_usb_active())
+		return -EINVAL;
+
+	if (clk_enable(usb_clk)) {
+		printk(KERN_ERR "clk_enable(usb_clk) failed\n");
+		return -EINVAL;
+	}
+
+	if (cpu_is_mx51()) {
+		usb_clk = clk_get(NULL, "usboh3_clk");
+		clk_enable(usb_clk);
+		clk_put(usb_clk);
+	}
+
+	/* enable board power supply for xcvr */
+	if (pdata->xcvr_pwr) {
+		if (pdata->xcvr_pwr->regu1)
+			regulator_enable(pdata->xcvr_pwr->regu1);
+		if (pdata->xcvr_pwr->regu2)
+			regulator_enable(pdata->xcvr_pwr->regu2);
+	}
+
+	if (xops->init)
+		xops->init(xops);
+
+	if (usb_register_remote_wakeup(pdev))
+		pr_debug("%s port is not a wakeup source.\n", pdata->name);
+
+	if (xops->xcvr_type == PORTSC_PTS_SERIAL) {
+		if (cpu_is_mx35()) {
+			usbh2_set_serial_xcvr();
+			/* Close the internal 60Mhz */
+			USBCTRL &= ~UCTRL_XCSH2;
+		} else if (cpu_is_mx25())
+			usbh2_set_serial_xcvr();
+		else
+			usbh1_set_serial_xcvr();
+	} else if (xops->xcvr_type == PORTSC_PTS_ULPI) {
+		if (!strcmp("Host 1", pdata->name)) {
+			usbh1_set_ulpi_xcvr();
+			if (cpu_is_mx51()) {
+#ifdef CONFIG_USB_EHCI_ARC_H1
+				gpio_usbh1_setback_stp();
+				/* disable remote wakeup irq */
+				USBCTRL &= ~UCTRL_H1WIE;
+#endif
+			}
+		}
+		if (!strcmp("Host 2", pdata->name)) {
+			usbh2_set_ulpi_xcvr();
+			if (cpu_is_mx51()) {
+#ifdef CONFIG_USB_EHCI_ARC_H2
+				gpio_usbh2_setback_stp();
+#endif
+			}
+		}
+	}
+
+	pr_debug("%s: %s success\n", __func__, pdata->name);
+	return 0;
+}
+EXPORT_SYMBOL(fsl_usb_host_init);
+
+void fsl_usb_host_uninit(struct fsl_usb2_platform_data *pdata)
+{
+	pr_debug("%s\n", __func__);
+
+	if (pdata->xcvr_ops && pdata->xcvr_ops->uninit)
+		pdata->xcvr_ops->uninit(pdata->xcvr_ops);
+
+	pdata->regs = NULL;
+
+	pdata->gpio_usb_inactive();
+	if (pdata->xcvr_type == PORTSC_PTS_SERIAL) {
+		/* Workaround an IC issue for ehci driver.
+		 * when turn off root hub port power, EHCI set
+		 * PORTSC reserved bits to be 0, but PTS with 0
+		 * means UTMI interface, so here force the Host2
+		 * port use the internal 60Mhz.
+		 */
+		if (cpu_is_mx35())
+			USBCTRL |= UCTRL_XCSH2;
+		clk_disable(usb_clk);
+	}
+
+	/* disable board power supply for xcvr */
+	if (pdata->xcvr_pwr) {
+		if (pdata->xcvr_pwr->regu1)
+			regulator_disable(pdata->xcvr_pwr->regu1);
+		if (pdata->xcvr_pwr->regu2)
+			regulator_disable(pdata->xcvr_pwr->regu2);
+	}
+
+	if (cpu_is_mx51()) {
+		usb_clk = clk_get(NULL, "usboh3_clk");
+		clk_disable(usb_clk);
+		clk_put(usb_clk);
+	}
+}
+EXPORT_SYMBOL(fsl_usb_host_uninit);
+
+static void otg_set_serial_xcvr(void)
+{
+	pr_debug("%s\n", __func__);
+}
+
+void otg_set_serial_host(void)
+{
+	pr_debug("%s\n", __func__);
+	/* set USBCTRL for host operation
+	 * disable: bypass mode,
+	 * set: single-ended/unidir/6 wire, OTG wakeup intr enable,
+	 *      power mask
+	 */
+	USBCTRL &= ~UCTRL_OSIC_MASK;
+#if defined(CONFIG_ARCH_MX27) || defined(CONFIG_ARCH_MX3)
+	USBCTRL &= ~UCTRL_BPE;
+#endif
+
+#if defined(CONFIG_MXC_USB_SB3)
+	USBCTRL |= UCTRL_OSIC_SB3 | UCTRL_OWIE | UCTRL_OPM;
+#elif defined(CONFIG_MXC_USB_SU6)
+	USBCTRL |= UCTRL_OSIC_SU6 | UCTRL_OWIE | UCTRL_OPM;
+#elif defined(CONFIG_MXC_USB_DB4)
+	USBCTRL |= UCTRL_OSIC_DB4 | UCTRL_OWIE | UCTRL_OPM;
+#else
+	USBCTRL |= UCTRL_OSIC_DU6 | UCTRL_OWIE | UCTRL_OPM;
+#endif
+
+	USB_OTG_MIRROR = OTGM_VBUSVAL | OTGM_ASESVLD;	/* 0xa */
+}
+EXPORT_SYMBOL(otg_set_serial_host);
+
+void otg_set_serial_peripheral(void)
+{
+	/* set USBCTRL for device operation
+	 * disable: bypass mode
+	 * set: differential/unidir/6 wire, OTG wakeup intr enable,
+	 *      power mask
+	 */
+	USBCTRL &= ~UCTRL_OSIC_MASK;
+#if defined(CONFIG_ARCH_MX27) || defined(CONFIG_ARCH_MX3)
+	USBCTRL &= ~UCTRL_BPE;
+#endif
+
+#if defined(CONFIG_MXC_USB_SB3)
+	USBCTRL |= UCTRL_OSIC_SB3 | UCTRL_OWIE | UCTRL_OPM;
+#elif defined(CONFIG_MXC_USB_SU6)
+	USBCTRL |= UCTRL_OSIC_SU6 | UCTRL_OWIE | UCTRL_OPM;
+#elif defined(CONFIG_MXC_USB_DB4)
+	USBCTRL |= UCTRL_OSIC_DB4 | UCTRL_OWIE | UCTRL_OPM;
+#else
+	USBCTRL |= UCTRL_OSIC_DU6 | UCTRL_OWIE | UCTRL_OPM;
+#endif
+
+	USB_OTG_MIRROR = OTGM_VBUSVAL | OTGM_BSESVLD | OTGM_IDIDG;	/* oxd */
+}
+EXPORT_SYMBOL(otg_set_serial_peripheral);
+
+static void otg_set_ulpi_xcvr(void)
+{
+	u32 tmp;
+
+	pr_debug("%s\n", __func__);
+	USBCTRL &= ~UCTRL_OSIC_MASK;
+#if defined(CONFIG_ARCH_MX27) || defined(CONFIG_ARCH_MX3)
+	USBCTRL &= ~UCTRL_BPE;
+#endif
+	USBCTRL |= UCTRL_OUIE |	/* ULPI intr enable */
+	    UCTRL_OWIE |	/* OTG wakeup intr enable */
+	    UCTRL_OPM;		/* power mask */
+
+	/* must set ULPI phy before turning off clock */
+	tmp = UOG_PORTSC1 & ~PORTSC_PTS_MASK;
+	tmp |= PORTSC_PTS_ULPI;
+	UOG_PORTSC1 = tmp;
+
+	/* need to reset the controller here so that the ID pin
+	 * is correctly detected.
+	 */
+	UOG_USBCMD |= UCMD_RESET;
+
+	/* allow controller to reset, and leave time for
+	 * the ULPI transceiver to reset too.
+	 */
+	msleep(100);
+
+	/* Turn off the usbpll for ulpi tranceivers */
+	clk_disable(usb_clk);
+}
+
+int fsl_usb_xcvr_suspend(struct fsl_xcvr_ops *xcvr_ops)
+{
+	if (!machine_is_mx31_3ds())
+		return -ECANCELED;
+
+	if (xcvr_ops->xcvr_type == PORTSC_PTS_ULPI) {
+		if (fsl_check_usbclk() != 0)
+			return -EINVAL;
+		if (gpio_usbotg_hs_active())
+			return -EINVAL;
+		clk_enable(usb_clk);
+
+		otg_set_ulpi_xcvr();
+
+		if (xcvr_ops->suspend)
+			/* suspend transceiver */
+			xcvr_ops->suspend(xcvr_ops);
+
+		gpio_usbotg_hs_inactive();
+		clk_disable(usb_clk);
+	}
+	return 0;
+}
+EXPORT_SYMBOL(fsl_usb_xcvr_suspend);
+
+static void otg_set_utmi_xcvr(void)
+{
+	u32 tmp;
+
+	/* Stop then Reset */
+	UOG_USBCMD &= ~UCMD_RUN_STOP;
+	while (UOG_USBCMD & UCMD_RUN_STOP) ;
+
+	UOG_USBCMD |= UCMD_RESET;
+	while ((UOG_USBCMD) & (UCMD_RESET)) ;
+
+	if (cpu_is_mx51()) {
+		/* OTG Polarity of Overcurrent is Low active */
+		USB_PHY_CTR_FUNC |= USB_UTMI_PHYCTRL_OC_POL;
+		/* Enable OTG Overcurrent Event */
+		USB_PHY_CTR_FUNC &= ~USB_UTMI_PHYCTRL_OC_DIS;
+	} else if (cpu_is_mx25()) {
+		USBCTRL |= UCTRL_OCPOL;
+		USBCTRL &= ~UCTRL_PP;
+	} else {
+		/* USBOTG_PWR low active */
+		USBCTRL &= ~UCTRL_PP;
+		/* OverCurrent Polarity is Low Active */
+		USBCTRL &= ~UCTRL_OCPOL;
+
+		if (cpu_is_mx35_rev(CHIP_REV_2_0) < 0)
+			/* OTG Lock Disable */
+			USBCTRL |= UCTRL_OLOCKD;
+	}
+
+	USBCTRL &= ~UCTRL_OPM;	/* OTG Power Mask */
+	USBCTRL &= ~UCTRL_OWIE;	/* OTG Wakeup Intr Disable */
+
+	/* set UTMI xcvr */
+	tmp = UOG_PORTSC1 & ~PORTSC_PTS_MASK;
+	tmp |= PORTSC_PTS_UTMI;
+	UOG_PORTSC1 = tmp;
+
+	if (cpu_is_mx51()) {
+		/* Set the PHY clock to 19.2MHz */
+		USB_PHY_CTR_FUNC2 &= ~USB_UTMI_PHYCTRL2_PLLDIV_MASK;
+		USB_PHY_CTR_FUNC2 |= 0x01;
+	} else if (machine_is_mx37_3ds()) {
+		/* Reference voltage for HS disconnect envelope detector */
+		/* adjust the Squelch level */
+		USB_PHY_CTR_FUNC2 &= ~(USB_UTMI_PHYCTRL2_HSDEVSEL_MASK <<
+			USB_UTMI_PHYCTRL2_HSDEVSEL_SHIFT);
+	}
+
+	/* Workaround an IC issue for ehci driver:
+	 * when turn off root hub port power, EHCI set
+	 * PORTSC reserved bits to be 0, but PTW with 0
+	 * means 8 bits tranceiver width, here change
+	 * it back to be 16 bits and do PHY diable and
+	 * then enable.
+	 */
+	UOG_PORTSC1 |= PORTSC_PTW;
+
+	if (cpu_is_mx35() || cpu_is_mx25()) {
+		/* Enable UTMI interface in PHY control Reg */
+		USB_PHY_CTR_FUNC &= ~USB_UTMI_PHYCTRL_UTMI_ENABLE;
+		USB_PHY_CTR_FUNC |= USB_UTMI_PHYCTRL_UTMI_ENABLE;
+	}
+
+	/* need to reset the controller here so that the ID pin
+	 * is correctly detected.
+	 */
+	/* Stop then Reset */
+	UOG_USBCMD &= ~UCMD_RUN_STOP;
+	while (UOG_USBCMD & UCMD_RUN_STOP) ;
+
+	UOG_USBCMD |= UCMD_RESET;
+	while ((UOG_USBCMD) & (UCMD_RESET)) ;
+
+	/* allow controller to reset, and leave time for
+	 * the ULPI transceiver to reset too.
+	 */
+	msleep(100);
+
+	/* Turn off the usbpll for mx25 UTMI tranceivers */
+	/* DDD: can we do this UTMI xcvrs on all boards? */
+	if (cpu_is_mx25()) {
+		clk_disable(usb_clk);
+	} else if (cpu_is_mx37()) {
+		/* fix USB PHY Power Gating leakage issue for i.MX37 */
+		USB_PHY_CTR_FUNC &= ~USB_UTMI_PHYCTRL_CHGRDETON;
+		USB_PHY_CTR_FUNC &= ~USB_UTMI_PHYCTRL_CHGRDETEN;
+	}
+}
+
+static int otg_used = 0;
+
+int usbotg_init(struct platform_device *pdev)
+{
+	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
+	struct fsl_xcvr_ops *xops;
+
+	pr_debug("%s: pdev=0x%p  pdata=0x%p\n", __func__, pdev, pdata);
+
+	xops = fsl_usb_get_xcvr(pdata->transceiver);
+	if (!xops) {
+		printk(KERN_ERR "DR transceiver ops missing\n");
+		return -EINVAL;
+	}
+	pdata->xcvr_ops = xops;
+	pdata->xcvr_type = xops->xcvr_type;
+	pdata->pdev = pdev;
+
+	if (!otg_used) {
+		if (fsl_check_usbclk() != 0)
+			return -EINVAL;
+
+		pr_debug("%s: grab pins\n", __func__);
+		if (pdata->gpio_usb_active())
+			return -EINVAL;
+
+		if (clk_enable(usb_clk)) {
+			printk(KERN_ERR "clk_enable(usb_clk) failed\n");
+			return -EINVAL;
+		}
+
+		if (xops->init)
+			xops->init(xops);
+
+		UOG_PORTSC1 = UOG_PORTSC1 & ~PORTSC_PHCD;
+		if (xops->xcvr_type == PORTSC_PTS_SERIAL) {
+			if (pdata->operating_mode == FSL_USB2_DR_HOST) {
+				otg_set_serial_host();
+				/* need reset */
+				UOG_USBCMD |= UCMD_RESET;
+				msleep(100);
+			} else if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
+				otg_set_serial_peripheral();
+			otg_set_serial_xcvr();
+		} else if (xops->xcvr_type == PORTSC_PTS_ULPI) {
+			otg_set_ulpi_xcvr();
+		} else if (xops->xcvr_type == PORTSC_PTS_UTMI) {
+			otg_set_utmi_xcvr();
+		}
+	}
+
+	if (usb_register_remote_wakeup(pdev))
+		pr_debug("DR is not a wakeup source.\n");
+
+	otg_used++;
+	pr_debug("%s: success\n", __func__);
+	return 0;
+}
+EXPORT_SYMBOL(usbotg_init);
+
+void usbotg_uninit(struct fsl_usb2_platform_data *pdata)
+{
+	pr_debug("%s\n", __func__);
+
+	otg_used--;
+	if (!otg_used) {
+		if (pdata->xcvr_ops && pdata->xcvr_ops->uninit)
+			pdata->xcvr_ops->uninit(pdata->xcvr_ops);
+
+		pdata->regs = NULL;
+
+		if (machine_is_mx31_3ds()) {
+			if (pdata->xcvr_ops && pdata->xcvr_ops->suspend)
+				pdata->xcvr_ops->suspend(pdata->xcvr_ops);
+			clk_disable(usb_clk);
+		}
+		msleep(1);
+		UOG_PORTSC1 = UOG_PORTSC1 | PORTSC_PHCD;
+		pdata->gpio_usb_inactive();
+		if (pdata->xcvr_type == PORTSC_PTS_SERIAL)
+			clk_disable(usb_clk);
+		clk_disable(usb_ahb_clk);
+	}
+}
+EXPORT_SYMBOL(usbotg_uninit);
+
+int usb_host_wakeup_irq(struct device *wkup_dev)
+{
+	int wakeup_req = 0;
+	struct fsl_usb2_platform_data *pdata = wkup_dev->platform_data;
+
+	if (!strcmp("Host 1", pdata->name)) {
+		wakeup_req = USBCTRL & UCTRL_H1WIR;
+	} else if (!strcmp("DR", pdata->name)) {
+		wakeup_req = USBCTRL & UCTRL_OWIR;
+		/* If DR is in device mode, let udc handle it */
+		if (wakeup_req && ((UOG_USBMODE & 0x3) == 0x2))
+			wakeup_req = 0;
+	}
+
+	return wakeup_req;
+}
+EXPORT_SYMBOL(usb_host_wakeup_irq);
+
+void usb_host_set_wakeup(struct device *wkup_dev, bool para)
+{
+	struct fsl_usb2_platform_data *pdata = wkup_dev->platform_data;
+
+	/* If this device may wakeup */
+	if (device_may_wakeup(wkup_dev) && para) {
+		if (!strcmp("Host 1", pdata->name)) {
+			USBCTRL |= UCTRL_H1WIE;
+		} else if (!strcmp("DR", pdata->name)) {
+			USBCTRL |= UCTRL_OWIE;
+			/* Enable OTG ID Wakeup */
+			USBCTRL_HOST2 |= (1 << 5);
+		}
+	}
+
+	if (!para) {
+		if (!strcmp("Host 1", pdata->name))
+			USBCTRL &= ~UCTRL_H1WIE;
+		else if (!strcmp("DR", pdata->name)) {
+			USBCTRL &= ~UCTRL_OWIE;
+			USBCTRL_HOST2 &= ~(1 << 5);
+		}
+	}
+}
+EXPORT_SYMBOL(usb_host_set_wakeup);