Initial import

1 files changed, 729 insertions, 0 deletions

diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
new file mode 100644
index 000000000..cc752d8c7
--- /dev/null
+++ b/drivers/usb/musb/omap2430.c
@@ -0,0 +1,729 @@
+/*
+ * Copyright (C) 2005-2007 by Texas Instruments
+ * Some code has been taken from tusb6010.c
+ * Copyrights for that are attributable to:
+ * Copyright (C) 2006 Nokia Corporation
+ * Tony Lindgren <tony@atomide.com>
+ *
+ * This file is part of the Inventra Controller Driver for Linux.
+ *
+ * The Inventra Controller Driver for Linux is free software; you
+ * can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 2 as published by the Free Software
+ * Foundation.
+ *
+ * The Inventra Controller Driver for Linux 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 The Inventra Controller Driver for Linux ; if not,
+ * write to the Free Software Foundation, Inc., 59 Temple Place,
+ * Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/pm_runtime.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/usb/musb-omap.h>
+#include <linux/phy/omap_control_phy.h>
+#include <linux/of_platform.h>
+
+#include "musb_core.h"
+#include "omap2430.h"
+
+struct omap2430_glue {
+	struct device		*dev;
+	struct platform_device	*musb;
+	enum omap_musb_vbus_id_status status;
+	struct work_struct	omap_musb_mailbox_work;
+	struct device		*control_otghs;
+};
+#define glue_to_musb(g)		platform_get_drvdata(g->musb)
+
+static struct omap2430_glue	*_glue;
+
+static struct timer_list musb_idle_timer;
+
+static void musb_do_idle(unsigned long _musb)
+{
+	struct musb	*musb = (void *)_musb;
+	unsigned long	flags;
+	u8	power;
+	u8	devctl;
+
+	spin_lock_irqsave(&musb->lock, flags);
+
+	switch (musb->xceiv->otg->state) {
+	case OTG_STATE_A_WAIT_BCON:
+
+		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+		if (devctl & MUSB_DEVCTL_BDEVICE) {
+			musb->xceiv->otg->state = OTG_STATE_B_IDLE;
+			MUSB_DEV_MODE(musb);
+		} else {
+			musb->xceiv->otg->state = OTG_STATE_A_IDLE;
+			MUSB_HST_MODE(musb);
+		}
+		break;
+	case OTG_STATE_A_SUSPEND:
+		/* finish RESUME signaling? */
+		if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
+			power = musb_readb(musb->mregs, MUSB_POWER);
+			power &= ~MUSB_POWER_RESUME;
+			dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
+			musb_writeb(musb->mregs, MUSB_POWER, power);
+			musb->is_active = 1;
+			musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
+						| MUSB_PORT_STAT_RESUME);
+			musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
+			usb_hcd_poll_rh_status(musb->hcd);
+			/* NOTE: it might really be A_WAIT_BCON ... */
+			musb->xceiv->otg->state = OTG_STATE_A_HOST;
+		}
+		break;
+	case OTG_STATE_A_HOST:
+		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+		if (devctl &  MUSB_DEVCTL_BDEVICE)
+			musb->xceiv->otg->state = OTG_STATE_B_IDLE;
+		else
+			musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
+	default:
+		break;
+	}
+	spin_unlock_irqrestore(&musb->lock, flags);
+}
+
+
+static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
+{
+	unsigned long		default_timeout = jiffies + msecs_to_jiffies(3);
+	static unsigned long	last_timer;
+
+	if (timeout == 0)
+		timeout = default_timeout;
+
+	/* Never idle if active, or when VBUS timeout is not set as host */
+	if (musb->is_active || ((musb->a_wait_bcon == 0)
+			&& (musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON))) {
+		dev_dbg(musb->controller, "%s active, deleting timer\n",
+			usb_otg_state_string(musb->xceiv->otg->state));
+		del_timer(&musb_idle_timer);
+		last_timer = jiffies;
+		return;
+	}
+
+	if (time_after(last_timer, timeout)) {
+		if (!timer_pending(&musb_idle_timer))
+			last_timer = timeout;
+		else {
+			dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
+			return;
+		}
+	}
+	last_timer = timeout;
+
+	dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
+		usb_otg_state_string(musb->xceiv->otg->state),
+		(unsigned long)jiffies_to_msecs(timeout - jiffies));
+	mod_timer(&musb_idle_timer, timeout);
+}
+
+static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
+{
+	struct usb_otg	*otg = musb->xceiv->otg;
+	u8		devctl;
+	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
+	/* HDRC controls CPEN, but beware current surges during device
+	 * connect.  They can trigger transient overcurrent conditions
+	 * that must be ignored.
+	 */
+
+	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+
+	if (is_on) {
+		if (musb->xceiv->otg->state == OTG_STATE_A_IDLE) {
+			int loops = 100;
+			/* start the session */
+			devctl |= MUSB_DEVCTL_SESSION;
+			musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+			/*
+			 * Wait for the musb to set as A device to enable the
+			 * VBUS
+			 */
+			while (musb_readb(musb->mregs, MUSB_DEVCTL) &
+			       MUSB_DEVCTL_BDEVICE) {
+
+				mdelay(5);
+				cpu_relax();
+
+				if (time_after(jiffies, timeout)
+				    || loops-- <= 0) {
+					dev_err(musb->controller,
+					"configured as A device timeout");
+					break;
+				}
+			}
+
+			otg_set_vbus(otg, 1);
+		} else {
+			musb->is_active = 1;
+			otg->default_a = 1;
+			musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
+			devctl |= MUSB_DEVCTL_SESSION;
+			MUSB_HST_MODE(musb);
+		}
+	} else {
+		musb->is_active = 0;
+
+		/* NOTE:  we're skipping A_WAIT_VFALL -> A_IDLE and
+		 * jumping right to B_IDLE...
+		 */
+
+		otg->default_a = 0;
+		musb->xceiv->otg->state = OTG_STATE_B_IDLE;
+		devctl &= ~MUSB_DEVCTL_SESSION;
+
+		MUSB_DEV_MODE(musb);
+	}
+	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+
+	dev_dbg(musb->controller, "VBUS %s, devctl %02x "
+		/* otg %3x conf %08x prcm %08x */ "\n",
+		usb_otg_state_string(musb->xceiv->otg->state),
+		musb_readb(musb->mregs, MUSB_DEVCTL));
+}
+
+static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
+{
+	u8	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+
+	devctl |= MUSB_DEVCTL_SESSION;
+	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+
+	return 0;
+}
+
+static inline void omap2430_low_level_exit(struct musb *musb)
+{
+	u32 l;
+
+	/* in any role */
+	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
+	l |= ENABLEFORCE;	/* enable MSTANDBY */
+	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
+}
+
+static inline void omap2430_low_level_init(struct musb *musb)
+{
+	u32 l;
+
+	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
+	l &= ~ENABLEFORCE;	/* disable MSTANDBY */
+	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
+}
+
+void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
+{
+	struct omap2430_glue	*glue = _glue;
+
+	if (!glue) {
+		pr_err("%s: musb core is not yet initialized\n", __func__);
+		return;
+	}
+	glue->status = status;
+
+	if (!glue_to_musb(glue)) {
+		pr_err("%s: musb core is not yet ready\n", __func__);
+		return;
+	}
+
+	schedule_work(&glue->omap_musb_mailbox_work);
+}
+EXPORT_SYMBOL_GPL(omap_musb_mailbox);
+
+static void omap_musb_set_mailbox(struct omap2430_glue *glue)
+{
+	struct musb *musb = glue_to_musb(glue);
+	struct device *dev = musb->controller;
+	struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev);
+	struct omap_musb_board_data *data = pdata->board_data;
+	struct usb_otg *otg = musb->xceiv->otg;
+
+	switch (glue->status) {
+	case OMAP_MUSB_ID_GROUND:
+		dev_dbg(dev, "ID GND\n");
+
+		otg->default_a = true;
+		musb->xceiv->otg->state = OTG_STATE_A_IDLE;
+		musb->xceiv->last_event = USB_EVENT_ID;
+		if (musb->gadget_driver) {
+			pm_runtime_get_sync(dev);
+			omap_control_usb_set_mode(glue->control_otghs,
+				USB_MODE_HOST);
+			omap2430_musb_set_vbus(musb, 1);
+		}
+		break;
+
+	case OMAP_MUSB_VBUS_VALID:
+		dev_dbg(dev, "VBUS Connect\n");
+
+		otg->default_a = false;
+		musb->xceiv->otg->state = OTG_STATE_B_IDLE;
+		musb->xceiv->last_event = USB_EVENT_VBUS;
+		if (musb->gadget_driver)
+			pm_runtime_get_sync(dev);
+		omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
+		break;
+
+	case OMAP_MUSB_ID_FLOAT:
+	case OMAP_MUSB_VBUS_OFF:
+		dev_dbg(dev, "VBUS Disconnect\n");
+
+		musb->xceiv->last_event = USB_EVENT_NONE;
+		if (musb->gadget_driver) {
+			omap2430_musb_set_vbus(musb, 0);
+			pm_runtime_mark_last_busy(dev);
+			pm_runtime_put_autosuspend(dev);
+		}
+
+		if (data->interface_type == MUSB_INTERFACE_UTMI)
+			otg_set_vbus(musb->xceiv->otg, 0);
+
+		omap_control_usb_set_mode(glue->control_otghs,
+			USB_MODE_DISCONNECT);
+		break;
+	default:
+		dev_dbg(dev, "ID float\n");
+	}
+
+	atomic_notifier_call_chain(&musb->xceiv->notifier,
+			musb->xceiv->last_event, NULL);
+}
+
+
+static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
+{
+	struct omap2430_glue *glue = container_of(mailbox_work,
+				struct omap2430_glue, omap_musb_mailbox_work);
+	struct musb *musb = glue_to_musb(glue);
+	struct device *dev = musb->controller;
+
+	pm_runtime_get_sync(dev);
+	omap_musb_set_mailbox(glue);
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+}
+
+static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
+{
+	unsigned long   flags;
+	irqreturn_t     retval = IRQ_NONE;
+	struct musb     *musb = __hci;
+
+	spin_lock_irqsave(&musb->lock, flags);
+
+	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
+	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
+	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
+
+	if (musb->int_usb || musb->int_tx || musb->int_rx)
+		retval = musb_interrupt(musb);
+
+	spin_unlock_irqrestore(&musb->lock, flags);
+
+	return retval;
+}
+
+static int omap2430_musb_init(struct musb *musb)
+{
+	u32 l;
+	int status = 0;
+	struct device *dev = musb->controller;
+	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
+	struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
+	struct omap_musb_board_data *data = plat->board_data;
+
+	/* We require some kind of external transceiver, hooked
+	 * up through ULPI.  TWL4030-family PMICs include one,
+	 * which needs a driver, drivers aren't always needed.
+	 */
+	if (dev->parent->of_node) {
+		musb->phy = devm_phy_get(dev->parent, "usb2-phy");
+
+		/* We can't totally remove musb->xceiv as of now because
+		 * musb core uses xceiv.state and xceiv.otg. Once we have
+		 * a separate state machine to handle otg, these can be moved
+		 * out of xceiv and then we can start using the generic PHY
+		 * framework
+		 */
+		musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent,
+		    "usb-phy", 0);
+	} else {
+		musb->xceiv = devm_usb_get_phy_dev(dev, 0);
+		musb->phy = devm_phy_get(dev, "usb");
+	}
+
+	if (IS_ERR(musb->xceiv)) {
+		status = PTR_ERR(musb->xceiv);
+
+		if (status == -ENXIO)
+			return status;
+
+		pr_err("HS USB OTG: no transceiver configured\n");
+		return -EPROBE_DEFER;
+	}
+
+	if (IS_ERR(musb->phy)) {
+		pr_err("HS USB OTG: no PHY configured\n");
+		return PTR_ERR(musb->phy);
+	}
+	musb->isr = omap2430_musb_interrupt;
+
+	status = pm_runtime_get_sync(dev);
+	if (status < 0) {
+		dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
+		goto err1;
+	}
+
+	l = musb_readl(musb->mregs, OTG_INTERFSEL);
+
+	if (data->interface_type == MUSB_INTERFACE_UTMI) {
+		/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
+		l &= ~ULPI_12PIN;       /* Disable ULPI */
+		l |= UTMI_8BIT;         /* Enable UTMI  */
+	} else {
+		l |= ULPI_12PIN;
+	}
+
+	musb_writel(musb->mregs, OTG_INTERFSEL, l);
+
+	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
+			"sysstatus 0x%x, intrfsel 0x%x, simenable  0x%x\n",
+			musb_readl(musb->mregs, OTG_REVISION),
+			musb_readl(musb->mregs, OTG_SYSCONFIG),
+			musb_readl(musb->mregs, OTG_SYSSTATUS),
+			musb_readl(musb->mregs, OTG_INTERFSEL),
+			musb_readl(musb->mregs, OTG_SIMENABLE));
+
+	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
+
+	if (glue->status != OMAP_MUSB_UNKNOWN)
+		omap_musb_set_mailbox(glue);
+
+	phy_init(musb->phy);
+	phy_power_on(musb->phy);
+
+	pm_runtime_put_noidle(musb->controller);
+	return 0;
+
+err1:
+	return status;
+}
+
+static void omap2430_musb_enable(struct musb *musb)
+{
+	u8		devctl;
+	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
+	struct device *dev = musb->controller;
+	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
+	struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev);
+	struct omap_musb_board_data *data = pdata->board_data;
+
+	switch (glue->status) {
+
+	case OMAP_MUSB_ID_GROUND:
+		omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
+		if (data->interface_type != MUSB_INTERFACE_UTMI)
+			break;
+		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+		/* start the session */
+		devctl |= MUSB_DEVCTL_SESSION;
+		musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+		while (musb_readb(musb->mregs, MUSB_DEVCTL) &
+				MUSB_DEVCTL_BDEVICE) {
+			cpu_relax();
+
+			if (time_after(jiffies, timeout)) {
+				dev_err(dev, "configured as A device timeout");
+				break;
+			}
+		}
+		break;
+
+	case OMAP_MUSB_VBUS_VALID:
+		omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static void omap2430_musb_disable(struct musb *musb)
+{
+	struct device *dev = musb->controller;
+	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
+
+	if (glue->status != OMAP_MUSB_UNKNOWN)
+		omap_control_usb_set_mode(glue->control_otghs,
+			USB_MODE_DISCONNECT);
+}
+
+static int omap2430_musb_exit(struct musb *musb)
+{
+	del_timer_sync(&musb_idle_timer);
+
+	omap2430_low_level_exit(musb);
+	phy_power_off(musb->phy);
+	phy_exit(musb->phy);
+
+	return 0;
+}
+
+static const struct musb_platform_ops omap2430_ops = {
+	.init		= omap2430_musb_init,
+	.exit		= omap2430_musb_exit,
+
+	.set_mode	= omap2430_musb_set_mode,
+	.try_idle	= omap2430_musb_try_idle,
+
+	.set_vbus	= omap2430_musb_set_vbus,
+
+	.enable		= omap2430_musb_enable,
+	.disable	= omap2430_musb_disable,
+};
+
+static u64 omap2430_dmamask = DMA_BIT_MASK(32);
+
+static int omap2430_probe(struct platform_device *pdev)
+{
+	struct resource			musb_resources[3];
+	struct musb_hdrc_platform_data	*pdata = dev_get_platdata(&pdev->dev);
+	struct omap_musb_board_data	*data;
+	struct platform_device		*musb;
+	struct omap2430_glue		*glue;
+	struct device_node		*np = pdev->dev.of_node;
+	struct musb_hdrc_config		*config;
+	int				ret = -ENOMEM, val;
+
+	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
+	if (!glue)
+		goto err0;
+
+	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
+	if (!musb) {
+		dev_err(&pdev->dev, "failed to allocate musb device\n");
+		goto err0;
+	}
+
+	musb->dev.parent		= &pdev->dev;
+	musb->dev.dma_mask		= &omap2430_dmamask;
+	musb->dev.coherent_dma_mask	= omap2430_dmamask;
+
+	glue->dev			= &pdev->dev;
+	glue->musb			= musb;
+	glue->status			= OMAP_MUSB_UNKNOWN;
+	glue->control_otghs = ERR_PTR(-ENODEV);
+
+	if (np) {
+		struct device_node *control_node;
+		struct platform_device *control_pdev;
+
+		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+		if (!pdata)
+			goto err2;
+
+		data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+		if (!data)
+			goto err2;
+
+		config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
+		if (!config)
+			goto err2;
+
+		of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
+		of_property_read_u32(np, "interface-type",
+						(u32 *)&data->interface_type);
+		of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
+		of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
+		of_property_read_u32(np, "power", (u32 *)&pdata->power);
+
+		ret = of_property_read_u32(np, "multipoint", &val);
+		if (!ret && val)
+			config->multipoint = true;
+
+		pdata->board_data	= data;
+		pdata->config		= config;
+
+		control_node = of_parse_phandle(np, "ctrl-module", 0);
+		if (control_node) {
+			control_pdev = of_find_device_by_node(control_node);
+			if (!control_pdev) {
+				dev_err(&pdev->dev, "Failed to get control device\n");
+				ret = -EINVAL;
+				goto err2;
+			}
+			glue->control_otghs = &control_pdev->dev;
+		}
+	}
+	pdata->platform_ops		= &omap2430_ops;
+
+	platform_set_drvdata(pdev, glue);
+
+	/*
+	 * REVISIT if we ever have two instances of the wrapper, we will be
+	 * in big trouble
+	 */
+	_glue	= glue;
+
+	INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
+
+	memset(musb_resources, 0x00, sizeof(*musb_resources) *
+			ARRAY_SIZE(musb_resources));
+
+	musb_resources[0].name = pdev->resource[0].name;
+	musb_resources[0].start = pdev->resource[0].start;
+	musb_resources[0].end = pdev->resource[0].end;
+	musb_resources[0].flags = pdev->resource[0].flags;
+
+	musb_resources[1].name = pdev->resource[1].name;
+	musb_resources[1].start = pdev->resource[1].start;
+	musb_resources[1].end = pdev->resource[1].end;
+	musb_resources[1].flags = pdev->resource[1].flags;
+
+	musb_resources[2].name = pdev->resource[2].name;
+	musb_resources[2].start = pdev->resource[2].start;
+	musb_resources[2].end = pdev->resource[2].end;
+	musb_resources[2].flags = pdev->resource[2].flags;
+
+	ret = platform_device_add_resources(musb, musb_resources,
+			ARRAY_SIZE(musb_resources));
+	if (ret) {
+		dev_err(&pdev->dev, "failed to add resources\n");
+		goto err2;
+	}
+
+	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
+	if (ret) {
+		dev_err(&pdev->dev, "failed to add platform_data\n");
+		goto err2;
+	}
+
+	pm_runtime_enable(&pdev->dev);
+
+	ret = platform_device_add(musb);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register musb device\n");
+		goto err2;
+	}
+
+	return 0;
+
+err2:
+	platform_device_put(musb);
+
+err0:
+	return ret;
+}
+
+static int omap2430_remove(struct platform_device *pdev)
+{
+	struct omap2430_glue		*glue = platform_get_drvdata(pdev);
+
+	cancel_work_sync(&glue->omap_musb_mailbox_work);
+	platform_device_unregister(glue->musb);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int omap2430_runtime_suspend(struct device *dev)
+{
+	struct omap2430_glue		*glue = dev_get_drvdata(dev);
+	struct musb			*musb = glue_to_musb(glue);
+
+	if (musb) {
+		musb->context.otg_interfsel = musb_readl(musb->mregs,
+				OTG_INTERFSEL);
+
+		omap2430_low_level_exit(musb);
+	}
+
+	return 0;
+}
+
+static int omap2430_runtime_resume(struct device *dev)
+{
+	struct omap2430_glue		*glue = dev_get_drvdata(dev);
+	struct musb			*musb = glue_to_musb(glue);
+
+	if (musb) {
+		omap2430_low_level_init(musb);
+		musb_writel(musb->mregs, OTG_INTERFSEL,
+				musb->context.otg_interfsel);
+	}
+
+	return 0;
+}
+
+static struct dev_pm_ops omap2430_pm_ops = {
+	.runtime_suspend = omap2430_runtime_suspend,
+	.runtime_resume = omap2430_runtime_resume,
+};
+
+#define DEV_PM_OPS	(&omap2430_pm_ops)
+#else
+#define DEV_PM_OPS	NULL
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id omap2430_id_table[] = {
+	{
+		.compatible = "ti,omap4-musb"
+	},
+	{
+		.compatible = "ti,omap3-musb"
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, omap2430_id_table);
+#endif
+
+static struct platform_driver omap2430_driver = {
+	.probe		= omap2430_probe,
+	.remove		= omap2430_remove,
+	.driver		= {
+		.name	= "musb-omap2430",
+		.pm	= DEV_PM_OPS,
+		.of_match_table = of_match_ptr(omap2430_id_table),
+	},
+};
+
+MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
+MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
+MODULE_LICENSE("GPL v2");
+
+static int __init omap2430_init(void)
+{
+	return platform_driver_register(&omap2430_driver);
+}
+subsys_initcall(omap2430_init);
+
+static void __exit omap2430_exit(void)
+{
+	platform_driver_unregister(&omap2430_driver);
+}
+module_exit(omap2430_exit);