[deliverable/linux.git] / drivers / usb / musb / omap2430.c

/*
 * 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/clk.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/err.h>

#include "musb_core.h"
#include "omap2430.h"

struct omap2430_glue {
	struct device		*dev;
	struct platform_device	*musb;
};
#define glue_to_musb(g)		platform_get_drvdata(g->musb)

static struct timer_list musb_idle_timer;

static void musb_do_idle(unsigned long _musb)
{
	struct musb	*musb = (void *)_musb;
	unsigned long	flags;
#ifdef CONFIG_USB_MUSB_HDRC_HCD
	u8	power;
#endif
	u8	devctl;

	spin_lock_irqsave(&musb->lock, flags);

	switch (musb->xceiv->state) {
	case OTG_STATE_A_WAIT_BCON:

		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
		if (devctl & MUSB_DEVCTL_BDEVICE) {
			musb->xceiv->state = OTG_STATE_B_IDLE;
			MUSB_DEV_MODE(musb);
		} else {
			musb->xceiv->state = OTG_STATE_A_IDLE;
			MUSB_HST_MODE(musb);
		}
		break;
#ifdef CONFIG_USB_MUSB_HDRC_HCD
	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;
			DBG(1, "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_to_hcd(musb));
			/* NOTE: it might really be A_WAIT_BCON ... */
			musb->xceiv->state = OTG_STATE_A_HOST;
		}
		break;
#endif
#ifdef CONFIG_USB_MUSB_HDRC_HCD
	case OTG_STATE_A_HOST:
		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
		if (devctl &  MUSB_DEVCTL_BDEVICE)
			musb->xceiv->state = OTG_STATE_B_IDLE;
		else
			musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
#endif
	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->state == OTG_STATE_A_WAIT_BCON))) {
		DBG(4, "%s active, deleting timer\n",
			otg_state_string(musb->xceiv->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 {
			DBG(4, "Longer idle timer already pending, ignoring\n");
			return;
		}
	}
	last_timer = timeout;

	DBG(4, "%s inactive, for idle timer for %lu ms\n",
		otg_state_string(musb->xceiv->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)
{
	u8		devctl;
	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	int ret = 1;
	/* 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->state == OTG_STATE_A_IDLE) {
			/* 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) & 0x80) {

				cpu_relax();

				if (time_after(jiffies, timeout)) {
					dev_err(musb->controller,
					"configured as A device timeout");
					ret = -EINVAL;
					break;
				}
			}

			if (ret && musb->xceiv->set_vbus)
				otg_set_vbus(musb->xceiv, 1);
		} else {
			musb->is_active = 1;
			musb->xceiv->default_a = 1;
			musb->xceiv->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...
		 */

		musb->xceiv->default_a = 0;
		musb->xceiv->state = OTG_STATE_B_IDLE;
		devctl &= ~MUSB_DEVCTL_SESSION;

		MUSB_DEV_MODE(musb);
	}
	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);

	DBG(1, "VBUS %s, devctl %02x "
		/* otg %3x conf %08x prcm %08x */ "\n",
		otg_state_string(musb->xceiv->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);
}

/* blocking notifier support */
static int musb_otg_notifications(struct notifier_block *nb,
		unsigned long event, void *unused)
{
	struct musb	*musb = container_of(nb, struct musb, nb);
	struct device *dev = musb->controller;
	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	struct omap_musb_board_data *data = pdata->board_data;

	switch (event) {
	case USB_EVENT_ID:
		DBG(4, "ID GND\n");

		if (is_otg_enabled(musb)) {
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
			if (musb->gadget_driver) {
				pm_runtime_get_sync(musb->controller);
				otg_init(musb->xceiv);
				omap2430_musb_set_vbus(musb, 1);
			}
#endif
		} else {
			pm_runtime_get_sync(musb->controller);
			otg_init(musb->xceiv);
			omap2430_musb_set_vbus(musb, 1);
		}
		break;

	case USB_EVENT_VBUS:
		DBG(4, "VBUS Connect\n");

#ifdef CONFIG_USB_GADGET_MUSB_HDRC
		if (musb->gadget_driver)
			pm_runtime_get_sync(musb->controller);
#endif
		otg_init(musb->xceiv);
		break;

	case USB_EVENT_NONE:
		DBG(4, "VBUS Disconnect\n");

#ifdef CONFIG_USB_GADGET_MUSB_HDRC
		if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
			if (musb->gadget_driver)
#endif
			{
				pm_runtime_mark_last_busy(musb->controller);
				pm_runtime_put_autosuspend(musb->controller);
			}

		if (data->interface_type == MUSB_INTERFACE_UTMI) {
			if (musb->xceiv->set_vbus)
				otg_set_vbus(musb->xceiv, 0);
		}
		otg_shutdown(musb->xceiv);
		break;
	default:
		DBG(4, "ID float\n");
		return NOTIFY_DONE;
	}

	return NOTIFY_OK;
}

static int omap2430_musb_init(struct musb *musb)
{
	u32 l, status = 0;
	struct device *dev = musb->controller;
	struct musb_hdrc_platform_data *plat = dev->platform_data;
	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.
	 */
	musb->xceiv = otg_get_transceiver();
	if (!musb->xceiv) {
		pr_err("HS USB OTG: no transceiver configured\n");
		return -ENODEV;
	}

	status = pm_runtime_get_sync(dev);
	if (status < 0) {
		dev_err(dev, "pm_runtime_get_sync FAILED");
		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));

	musb->nb.notifier_call = musb_otg_notifications;
	status = otg_register_notifier(musb->xceiv, &musb->nb);

	if (status)
		DBG(1, "notification register failed\n");

	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);

	return 0;

err1:
	pm_runtime_disable(dev);
	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 musb_hdrc_platform_data *pdata = dev->platform_data;
	struct omap_musb_board_data *data = pdata->board_data;

	switch (musb->xceiv->last_event) {

	case USB_EVENT_ID:
		otg_init(musb->xceiv);
		if (data->interface_type == MUSB_INTERFACE_UTMI) {
			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(musb->controller,
					"configured as A device timeout");
					break;
				}
			}
		}
		break;

	case USB_EVENT_VBUS:
		otg_init(musb->xceiv);
		break;

	default:
		break;
	}
}

static void omap2430_musb_disable(struct musb *musb)
{
	if (musb->xceiv->last_event)
		otg_shutdown(musb->xceiv);
}

static int omap2430_musb_exit(struct musb *musb)
{
	del_timer_sync(&musb_idle_timer);

	omap2430_low_level_exit(musb);
	otg_put_transceiver(musb->xceiv);

	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 __init omap2430_probe(struct platform_device *pdev)
{
	struct musb_hdrc_platform_data	*pdata = pdev->dev.platform_data;
	struct platform_device		*musb;
	struct omap2430_glue		*glue;
	int				ret = -ENOMEM;

	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	if (!glue) {
		dev_err(&pdev->dev, "failed to allocate glue context\n");
		goto err0;
	}

	musb = platform_device_alloc("musb-hdrc", -1);
	if (!musb) {
		dev_err(&pdev->dev, "failed to allocate musb device\n");
		goto err1;
	}

	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;

	pdata->platform_ops		= &omap2430_ops;

	platform_set_drvdata(pdev, glue);

	ret = platform_device_add_resources(musb, pdev->resource,
			pdev->num_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;
	}

	ret = platform_device_add(musb);
	if (ret) {
		dev_err(&pdev->dev, "failed to register musb device\n");
		goto err2;
	}

	pm_runtime_enable(&pdev->dev);

	return 0;

err2:
	platform_device_put(musb);

err1:
	kfree(glue);

err0:
	return ret;
}

static int __exit omap2430_remove(struct platform_device *pdev)
{
	struct omap2430_glue		*glue = platform_get_drvdata(pdev);

	platform_device_del(glue->musb);
	platform_device_put(glue->musb);
	pm_runtime_put(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
	kfree(glue);

	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);

	omap2430_low_level_exit(musb);
	otg_set_suspend(musb->xceiv, 1);

	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);

	omap2430_low_level_init(musb);
	otg_set_suspend(musb->xceiv, 0);

	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

static struct platform_driver omap2430_driver = {
	.remove		= __exit_p(omap2430_remove),
	.driver		= {
		.name	= "musb-omap2430",
		.pm	= DEV_PM_OPS,
	},
};

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_probe(&omap2430_driver, omap2430_probe);
}
subsys_initcall(omap2430_init);

static void __exit omap2430_exit(void)
{
	platform_driver_unregister(&omap2430_driver);
}
module_exit(omap2430_exit);
Commit	Line	Data
550a7375 FB	1	/*
	2	* Copyright (C) 2005-2007 by Texas Instruments
	3	* Some code has been taken from tusb6010.c
	4	* Copyrights for that are attributable to:
	5	* Copyright (C) 2006 Nokia Corporation
550a7375 FB	6	* Tony Lindgren <tony@atomide.com>
	7	*
	8	* This file is part of the Inventra Controller Driver for Linux.
	9	*
	10	* The Inventra Controller Driver for Linux is free software; you
	11	* can redistribute it and/or modify it under the terms of the GNU
	12	* General Public License version 2 as published by the Free Software
	13	* Foundation.
	14	*
	15	* The Inventra Controller Driver for Linux is distributed in
	16	* the hope that it will be useful, but WITHOUT ANY WARRANTY;
	17	* without even the implied warranty of MERCHANTABILITY or
	18	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
	19	* License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with The Inventra Controller Driver for Linux ; if not,
	23	* write to the Free Software Foundation, Inc., 59 Temple Place,
	24	* Suite 330, Boston, MA 02111-1307 USA
	25	*
	26	*/
	27	#include <linux/module.h>
	28	#include <linux/kernel.h>
	29	#include <linux/sched.h>
550a7375 FB	30	#include <linux/init.h>
	31	#include <linux/list.h>
	32	#include <linux/clk.h>
	33	#include <linux/io.h>
dc09886b FB	34	#include <linux/platform_device.h>
dc09886b FB	35	#include <linux/dma-mapping.h>
207b0e1f HH	36	#include <linux/pm_runtime.h>
207b0e1f HH	37	#include <linux/err.h>
550a7375	38
550a7375 FB	39	#include "musb_core.h"
	40	#include "omap2430.h"
	41
a3cee12a FB	42	struct omap2430_glue {
	43	struct device *dev;
	44	struct platform_device *musb;
	45	};
c20aebb9	46	#define glue_to_musb(g) platform_get_drvdata(g->musb)
a3cee12a	47
550a7375 FB	48	static struct timer_list musb_idle_timer;
	49
	50	static void musb_do_idle(unsigned long _musb)
	51	{
	52	struct musb musb = (void )_musb;
	53	unsigned long flags;
eef767b7	54	#ifdef CONFIG_USB_MUSB_HDRC_HCD
550a7375	55	u8 power;
eef767b7	56	#endif
550a7375 FB	57	u8 devctl;
550a7375 FB	58
550a7375 FB	59	spin_lock_irqsave(&musb->lock, flags);
550a7375 FB	60
84e250ff	61	switch (musb->xceiv->state) {
550a7375	62	case OTG_STATE_A_WAIT_BCON:
550a7375 FB	63
	64	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	65	if (devctl & MUSB_DEVCTL_BDEVICE) {
84e250ff	66	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	67	MUSB_DEV_MODE(musb);
550a7375 FB	68	} else {
84e250ff	69	musb->xceiv->state = OTG_STATE_A_IDLE;
550a7375 FB	70	MUSB_HST_MODE(musb);
	71	}
	72	break;
	73	#ifdef CONFIG_USB_MUSB_HDRC_HCD
	74	case OTG_STATE_A_SUSPEND:
	75	/* finish RESUME signaling? */
	76	if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
	77	power = musb_readb(musb->mregs, MUSB_POWER);
	78	power &= ~MUSB_POWER_RESUME;
	79	DBG(1, "root port resume stopped, power %02x\n", power);
	80	musb_writeb(musb->mregs, MUSB_POWER, power);
	81	musb->is_active = 1;
	82	musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
	83	\| MUSB_PORT_STAT_RESUME);
	84	musb->port1_status \|= USB_PORT_STAT_C_SUSPEND << 16;
	85	usb_hcd_poll_rh_status(musb_to_hcd(musb));
	86	/* NOTE: it might really be A_WAIT_BCON ... */
84e250ff	87	musb->xceiv->state = OTG_STATE_A_HOST;
550a7375 FB	88	}
	89	break;
	90	#endif
	91	#ifdef CONFIG_USB_MUSB_HDRC_HCD
	92	case OTG_STATE_A_HOST:
	93	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	94	if (devctl & MUSB_DEVCTL_BDEVICE)
84e250ff	95	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375	96	else
84e250ff	97	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
550a7375 FB	98	#endif
	99	default:
	100	break;
	101	}
	102	spin_unlock_irqrestore(&musb->lock, flags);
	103	}
	104
	105
743411b3	106	static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
550a7375 FB	107	{
	108	unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
	109	static unsigned long last_timer;
	110
	111	if (timeout == 0)
	112	timeout = default_timeout;
	113
	114	/* Never idle if active, or when VBUS timeout is not set as host */
	115	if (musb->is_active \|\| ((musb->a_wait_bcon == 0)
84e250ff	116	&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
3df00453 AG	117	DBG(4, "%s active, deleting timer\n",
3df00453 AG	118	otg_state_string(musb->xceiv->state));
550a7375 FB	119	del_timer(&musb_idle_timer);
	120	last_timer = jiffies;
	121	return;
	122	}
	123
	124	if (time_after(last_timer, timeout)) {
	125	if (!timer_pending(&musb_idle_timer))
	126	last_timer = timeout;
	127	else {
	128	DBG(4, "Longer idle timer already pending, ignoring\n");
	129	return;
	130	}
	131	}
	132	last_timer = timeout;
	133
	134	DBG(4, "%s inactive, for idle timer for %lu ms\n",
3df00453	135	otg_state_string(musb->xceiv->state),
550a7375 FB	136	(unsigned long)jiffies_to_msecs(timeout - jiffies));
	137	mod_timer(&musb_idle_timer, timeout);
	138	}
	139
743411b3	140	static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
550a7375 FB	141	{
550a7375 FB	142	u8 devctl;
594632ef HH	143	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
594632ef HH	144	int ret = 1;
550a7375 FB	145	/* HDRC controls CPEN, but beware current surges during device
	146	* connect. They can trigger transient overcurrent conditions
	147	* that must be ignored.
	148	*/
	149
	150	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	151
	152	if (is_on) {
594632ef HH	153	if (musb->xceiv->state == OTG_STATE_A_IDLE) {
	154	/* start the session */
	155	devctl \|= MUSB_DEVCTL_SESSION;
	156	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	157	/*
	158	* Wait for the musb to set as A device to enable the
	159	* VBUS
	160	*/
	161	while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
	162
	163	cpu_relax();
	164
	165	if (time_after(jiffies, timeout)) {
	166	dev_err(musb->controller,
	167	"configured as A device timeout");
	168	ret = -EINVAL;
	169	break;
	170	}
	171	}
	172
	173	if (ret && musb->xceiv->set_vbus)
	174	otg_set_vbus(musb->xceiv, 1);
	175	} else {
	176	musb->is_active = 1;
	177	musb->xceiv->default_a = 1;
	178	musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
	179	devctl \|= MUSB_DEVCTL_SESSION;
	180	MUSB_HST_MODE(musb);
	181	}
550a7375 FB	182	} else {
	183	musb->is_active = 0;
	184
	185	/* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
	186	* jumping right to B_IDLE...
	187	*/
	188
84e250ff DB	189	musb->xceiv->default_a = 0;
84e250ff DB	190	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	191	devctl &= ~MUSB_DEVCTL_SESSION;
	192
	193	MUSB_DEV_MODE(musb);
	194	}
	195	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	196
	197	DBG(1, "VBUS %s, devctl %02x "
	198	/* otg %3x conf %08x prcm %08x */ "\n",
3df00453	199	otg_state_string(musb->xceiv->state),
550a7375 FB	200	musb_readb(musb->mregs, MUSB_DEVCTL));
550a7375 FB	201	}
550a7375	202
743411b3	203	static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
550a7375 FB	204	{
	205	u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	206
	207	devctl \|= MUSB_DEVCTL_SESSION;
	208	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	209
96a274d1	210	return 0;
550a7375 FB	211	}
550a7375 FB	212
c20aebb9 FB	213	static inline void omap2430_low_level_exit(struct musb *musb)
	214	{
	215	u32 l;
	216
	217	/* in any role */
	218	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	219	l \|= ENABLEFORCE; /* enable MSTANDBY */
	220	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
c20aebb9 FB	221	}
	222
	223	static inline void omap2430_low_level_init(struct musb *musb)
	224	{
	225	u32 l;
	226
c20aebb9 FB	227	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	228	l &= ~ENABLEFORCE; /* disable MSTANDBY */
	229	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
	230	}
	231
594632ef HH	232	/* blocking notifier support */
	233	static int musb_otg_notifications(struct notifier_block *nb,
	234	unsigned long event, void *unused)
	235	{
	236	struct musb *musb = container_of(nb, struct musb, nb);
	237	struct device *dev = musb->controller;
	238	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	239	struct omap_musb_board_data *data = pdata->board_data;
	240
	241	switch (event) {
	242	case USB_EVENT_ID:
	243	DBG(4, "ID GND\n");
	244
	245	if (is_otg_enabled(musb)) {
	246	#ifdef CONFIG_USB_GADGET_MUSB_HDRC
	247	if (musb->gadget_driver) {
7acc6197	248	pm_runtime_get_sync(musb->controller);
594632ef	249	otg_init(musb->xceiv);
70045c57	250	omap2430_musb_set_vbus(musb, 1);
594632ef HH	251	}
	252	#endif
	253	} else {
7acc6197	254	pm_runtime_get_sync(musb->controller);
594632ef	255	otg_init(musb->xceiv);
70045c57	256	omap2430_musb_set_vbus(musb, 1);
594632ef HH	257	}
	258	break;
	259
	260	case USB_EVENT_VBUS:
	261	DBG(4, "VBUS Connect\n");
	262
36a52c00	263	#ifdef CONFIG_USB_GADGET_MUSB_HDRC
7acc6197 HH	264	if (musb->gadget_driver)
7acc6197 HH	265	pm_runtime_get_sync(musb->controller);
36a52c00	266	#endif
594632ef HH	267	otg_init(musb->xceiv);
	268	break;
	269
	270	case USB_EVENT_NONE:
	271	DBG(4, "VBUS Disconnect\n");
	272
7acc6197	273	#ifdef CONFIG_USB_GADGET_MUSB_HDRC
383cf4e8	274	if (is_otg_enabled(musb) \|\| is_peripheral_enabled(musb))
7acc6197 HH	275	if (musb->gadget_driver)
	276	#endif
	277	{
	278	pm_runtime_mark_last_busy(musb->controller);
	279	pm_runtime_put_autosuspend(musb->controller);
	280	}
	281
594632ef HH	282	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	283	if (musb->xceiv->set_vbus)
	284	otg_set_vbus(musb->xceiv, 0);
	285	}
	286	otg_shutdown(musb->xceiv);
	287	break;
	288	default:
	289	DBG(4, "ID float\n");
	290	return NOTIFY_DONE;
	291	}
	292
	293	return NOTIFY_OK;
	294	}
	295
743411b3	296	static int omap2430_musb_init(struct musb *musb)
550a7375	297	{
594632ef	298	u32 l, status = 0;
ea65df57 HK	299	struct device *dev = musb->controller;
	300	struct musb_hdrc_platform_data *plat = dev->platform_data;
	301	struct omap_musb_board_data *data = plat->board_data;
550a7375	302
84e250ff DB	303	/* We require some kind of external transceiver, hooked
	304	* up through ULPI. TWL4030-family PMICs include one,
	305	* which needs a driver, drivers aren't always needed.
	306	*/
	307	musb->xceiv = otg_get_transceiver();
	308	if (!musb->xceiv) {
	309	pr_err("HS USB OTG: no transceiver configured\n");
	310	return -ENODEV;
	311	}
	312
7acc6197 HH	313	status = pm_runtime_get_sync(dev);
	314	if (status < 0) {
	315	dev_err(dev, "pm_runtime_get_sync FAILED");
	316	goto err1;
	317	}
550a7375	318
8573e6a6	319	l = musb_readl(musb->mregs, OTG_INTERFSEL);
de2e1b0c MM	320
	321	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	322	/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
	323	l &= ~ULPI_12PIN; /* Disable ULPI */
	324	l \|= UTMI_8BIT; /* Enable UTMI */
	325	} else {
	326	l \|= ULPI_12PIN;
	327	}
	328
8573e6a6	329	musb_writel(musb->mregs, OTG_INTERFSEL, l);
550a7375 FB	330
	331	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
	332	"sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
8573e6a6 FB	333	musb_readl(musb->mregs, OTG_REVISION),
	334	musb_readl(musb->mregs, OTG_SYSCONFIG),
	335	musb_readl(musb->mregs, OTG_SYSSTATUS),
	336	musb_readl(musb->mregs, OTG_INTERFSEL),
	337	musb_readl(musb->mregs, OTG_SIMENABLE));
550a7375	338
594632ef HH	339	musb->nb.notifier_call = musb_otg_notifications;
	340	status = otg_register_notifier(musb->xceiv, &musb->nb);
	341
	342	if (status)
	343	DBG(1, "notification register failed\n");
	344
550a7375 FB	345	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
	346
	347	return 0;
7acc6197 HH	348
	349	err1:
	350	pm_runtime_disable(dev);
	351	return status;
550a7375 FB	352	}
550a7375 FB	353
002eda13 HH	354	static void omap2430_musb_enable(struct musb *musb)
	355	{
	356	u8 devctl;
	357	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	358	struct device *dev = musb->controller;
	359	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	360	struct omap_musb_board_data *data = pdata->board_data;
	361
	362	switch (musb->xceiv->last_event) {
	363
	364	case USB_EVENT_ID:
	365	otg_init(musb->xceiv);
	366	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	367	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	368	/* start the session */
	369	devctl \|= MUSB_DEVCTL_SESSION;
	370	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	371	while (musb_readb(musb->mregs, MUSB_DEVCTL) &
	372	MUSB_DEVCTL_BDEVICE) {
	373	cpu_relax();
	374
	375	if (time_after(jiffies, timeout)) {
	376	dev_err(musb->controller,
	377	"configured as A device timeout");
	378	break;
	379	}
	380	}
	381	}
	382	break;
	383
	384	case USB_EVENT_VBUS:
	385	otg_init(musb->xceiv);
	386	break;
	387
	388	default:
	389	break;
	390	}
	391	}
	392
	393	static void omap2430_musb_disable(struct musb *musb)
	394	{
	395	if (musb->xceiv->last_event)
	396	otg_shutdown(musb->xceiv);
550a7375 FB	397	}
550a7375 FB	398
743411b3	399	static int omap2430_musb_exit(struct musb *musb)
550a7375	400	{
19b9a83e	401	del_timer_sync(&musb_idle_timer);
550a7375	402
c20aebb9	403	omap2430_low_level_exit(musb);
f4053874	404	otg_put_transceiver(musb->xceiv);
c20aebb9	405
550a7375 FB	406	return 0;
550a7375 FB	407	}
743411b3	408
f7ec9437	409	static const struct musb_platform_ops omap2430_ops = {
743411b3 FB	410	.init = omap2430_musb_init,
	411	.exit = omap2430_musb_exit,
	412
743411b3 FB	413	.set_mode = omap2430_musb_set_mode,
	414	.try_idle = omap2430_musb_try_idle,
	415
	416	.set_vbus = omap2430_musb_set_vbus,
002eda13 HH	417
	418	.enable = omap2430_musb_enable,
	419	.disable = omap2430_musb_disable,
743411b3	420	};
dc09886b FB	421
	422	static u64 omap2430_dmamask = DMA_BIT_MASK(32);
	423
	424	static int __init omap2430_probe(struct platform_device *pdev)
	425	{
	426	struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
	427	struct platform_device *musb;
a3cee12a	428	struct omap2430_glue *glue;
dc09886b FB	429	int ret = -ENOMEM;
dc09886b FB	430
a3cee12a FB	431	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	432	if (!glue) {
	433	dev_err(&pdev->dev, "failed to allocate glue context\n");
	434	goto err0;
	435	}
	436
dc09886b FB	437	musb = platform_device_alloc("musb-hdrc", -1);
	438	if (!musb) {
	439	dev_err(&pdev->dev, "failed to allocate musb device\n");
a3cee12a	440	goto err1;
dc09886b FB	441	}
	442
	443	musb->dev.parent = &pdev->dev;
	444	musb->dev.dma_mask = &omap2430_dmamask;
	445	musb->dev.coherent_dma_mask = omap2430_dmamask;
	446
a3cee12a FB	447	glue->dev = &pdev->dev;
	448	glue->musb = musb;
	449
f7ec9437 FB	450	pdata->platform_ops = &omap2430_ops;
f7ec9437 FB	451
a3cee12a	452	platform_set_drvdata(pdev, glue);
dc09886b FB	453
	454	ret = platform_device_add_resources(musb, pdev->resource,
	455	pdev->num_resources);
	456	if (ret) {
	457	dev_err(&pdev->dev, "failed to add resources\n");
207b0e1f	458	goto err2;
dc09886b FB	459	}
	460
	461	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	462	if (ret) {
	463	dev_err(&pdev->dev, "failed to add platform_data\n");
207b0e1f	464	goto err2;
dc09886b FB	465	}
	466
	467	ret = platform_device_add(musb);
	468	if (ret) {
	469	dev_err(&pdev->dev, "failed to register musb device\n");
207b0e1f	470	goto err2;
dc09886b FB	471	}
dc09886b FB	472
207b0e1f	473	pm_runtime_enable(&pdev->dev);
03491761	474
207b0e1f	475	return 0;
03491761	476
a3cee12a	477	err2:
dc09886b FB	478	platform_device_put(musb);
dc09886b FB	479
a3cee12a FB	480	err1:
	481	kfree(glue);
	482
dc09886b FB	483	err0:
	484	return ret;
	485	}
	486
	487	static int __exit omap2430_remove(struct platform_device *pdev)
	488	{
a3cee12a	489	struct omap2430_glue *glue = platform_get_drvdata(pdev);
dc09886b	490
a3cee12a FB	491	platform_device_del(glue->musb);
a3cee12a FB	492	platform_device_put(glue->musb);
207b0e1f HH	493	pm_runtime_put(&pdev->dev);
207b0e1f HH	494	pm_runtime_disable(&pdev->dev);
a3cee12a	495	kfree(glue);
dc09886b FB	496
	497	return 0;
	498	}
	499
c20aebb9	500	#ifdef CONFIG_PM
c20aebb9	501
7acc6197	502	static int omap2430_runtime_suspend(struct device *dev)
c20aebb9 FB	503	{
	504	struct omap2430_glue *glue = dev_get_drvdata(dev);
	505	struct musb *musb = glue_to_musb(glue);
	506
	507	omap2430_low_level_exit(musb);
	508	otg_set_suspend(musb->xceiv, 1);
c20aebb9 FB	509
	510	return 0;
	511	}
	512
7acc6197	513	static int omap2430_runtime_resume(struct device *dev)
c20aebb9 FB	514	{
	515	struct omap2430_glue *glue = dev_get_drvdata(dev);
	516	struct musb *musb = glue_to_musb(glue);
c20aebb9 FB	517
c20aebb9 FB	518	omap2430_low_level_init(musb);
c20aebb9 FB	519	otg_set_suspend(musb->xceiv, 0);
	520
	521	return 0;
	522	}
	523
	524	static struct dev_pm_ops omap2430_pm_ops = {
7acc6197 HH	525	.runtime_suspend = omap2430_runtime_suspend,
7acc6197 HH	526	.runtime_resume = omap2430_runtime_resume,
c20aebb9 FB	527	};
	528
	529	#define DEV_PM_OPS (&omap2430_pm_ops)
	530	#else
	531	#define DEV_PM_OPS NULL
	532	#endif
	533
dc09886b FB	534	static struct platform_driver omap2430_driver = {
	535	.remove = __exit_p(omap2430_remove),
	536	.driver = {
	537	.name = "musb-omap2430",
c20aebb9	538	.pm = DEV_PM_OPS,
dc09886b FB	539	},
	540	};
	541
	542	MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
	543	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
	544	MODULE_LICENSE("GPL v2");
	545
	546	static int __init omap2430_init(void)
	547	{
	548	return platform_driver_probe(&omap2430_driver, omap2430_probe);
	549	}
	550	subsys_initcall(omap2430_init);
	551
	552	static void __exit omap2430_exit(void)
	553	{
	554	platform_driver_unregister(&omap2430_driver);
	555	}
	556	module_exit(omap2430_exit);