[GitHub/mt8127/android_kernel_alcatel_ttab.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));
		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),
		(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),
		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))) {
550a7375 FB	117	DBG(4, "%s active, deleting timer\n", otg_state_string(musb));
	118	del_timer(&musb_idle_timer);
	119	last_timer = jiffies;
	120	return;
	121	}
	122
	123	if (time_after(last_timer, timeout)) {
	124	if (!timer_pending(&musb_idle_timer))
	125	last_timer = timeout;
	126	else {
	127	DBG(4, "Longer idle timer already pending, ignoring\n");
	128	return;
	129	}
	130	}
	131	last_timer = timeout;
	132
	133	DBG(4, "%s inactive, for idle timer for %lu ms\n",
	134	otg_state_string(musb),
	135	(unsigned long)jiffies_to_msecs(timeout - jiffies));
	136	mod_timer(&musb_idle_timer, timeout);
	137	}
	138
743411b3	139	static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
550a7375 FB	140	{
550a7375 FB	141	u8 devctl;
594632ef HH	142	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
594632ef HH	143	int ret = 1;
550a7375 FB	144	/* HDRC controls CPEN, but beware current surges during device
	145	* connect. They can trigger transient overcurrent conditions
	146	* that must be ignored.
	147	*/
	148
	149	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	150
	151	if (is_on) {
594632ef HH	152	if (musb->xceiv->state == OTG_STATE_A_IDLE) {
	153	/* start the session */
	154	devctl \|= MUSB_DEVCTL_SESSION;
	155	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	156	/*
	157	* Wait for the musb to set as A device to enable the
	158	* VBUS
	159	*/
	160	while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
	161
	162	cpu_relax();
	163
	164	if (time_after(jiffies, timeout)) {
	165	dev_err(musb->controller,
	166	"configured as A device timeout");
	167	ret = -EINVAL;
	168	break;
	169	}
	170	}
	171
	172	if (ret && musb->xceiv->set_vbus)
	173	otg_set_vbus(musb->xceiv, 1);
	174	} else {
	175	musb->is_active = 1;
	176	musb->xceiv->default_a = 1;
	177	musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
	178	devctl \|= MUSB_DEVCTL_SESSION;
	179	MUSB_HST_MODE(musb);
	180	}
550a7375 FB	181	} else {
	182	musb->is_active = 0;
	183
	184	/* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
	185	* jumping right to B_IDLE...
	186	*/
	187
84e250ff DB	188	musb->xceiv->default_a = 0;
84e250ff DB	189	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	190	devctl &= ~MUSB_DEVCTL_SESSION;
	191
	192	MUSB_DEV_MODE(musb);
	193	}
	194	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	195
	196	DBG(1, "VBUS %s, devctl %02x "
	197	/* otg %3x conf %08x prcm %08x */ "\n",
	198	otg_state_string(musb),
	199	musb_readb(musb->mregs, MUSB_DEVCTL));
	200	}
550a7375	201
743411b3	202	static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
550a7375 FB	203	{
	204	u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	205
	206	devctl \|= MUSB_DEVCTL_SESSION;
	207	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	208
96a274d1	209	return 0;
550a7375 FB	210	}
550a7375 FB	211
c20aebb9 FB	212	static inline void omap2430_low_level_exit(struct musb *musb)
	213	{
	214	u32 l;
	215
	216	/* in any role */
	217	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	218	l \|= ENABLEFORCE; /* enable MSTANDBY */
	219	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
c20aebb9 FB	220	}
	221
	222	static inline void omap2430_low_level_init(struct musb *musb)
	223	{
	224	u32 l;
	225
c20aebb9 FB	226	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	227	l &= ~ENABLEFORCE; /* disable MSTANDBY */
	228	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
	229	}
	230
594632ef HH	231	/* blocking notifier support */
	232	static int musb_otg_notifications(struct notifier_block *nb,
	233	unsigned long event, void *unused)
	234	{
	235	struct musb *musb = container_of(nb, struct musb, nb);
	236	struct device *dev = musb->controller;
	237	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	238	struct omap_musb_board_data *data = pdata->board_data;
	239
	240	switch (event) {
	241	case USB_EVENT_ID:
	242	DBG(4, "ID GND\n");
	243
	244	if (is_otg_enabled(musb)) {
	245	#ifdef CONFIG_USB_GADGET_MUSB_HDRC
	246	if (musb->gadget_driver) {
7acc6197	247	pm_runtime_get_sync(musb->controller);
594632ef	248	otg_init(musb->xceiv);
70045c57	249	omap2430_musb_set_vbus(musb, 1);
594632ef HH	250	}
	251	#endif
	252	} else {
7acc6197	253	pm_runtime_get_sync(musb->controller);
594632ef	254	otg_init(musb->xceiv);
70045c57	255	omap2430_musb_set_vbus(musb, 1);
594632ef HH	256	}
	257	break;
	258
	259	case USB_EVENT_VBUS:
	260	DBG(4, "VBUS Connect\n");
	261
36a52c00	262	#ifdef CONFIG_USB_GADGET_MUSB_HDRC
7acc6197 HH	263	if (musb->gadget_driver)
7acc6197 HH	264	pm_runtime_get_sync(musb->controller);
36a52c00	265	#endif
594632ef HH	266	otg_init(musb->xceiv);
	267	break;
	268
	269	case USB_EVENT_NONE:
	270	DBG(4, "VBUS Disconnect\n");
	271
7acc6197	272	#ifdef CONFIG_USB_GADGET_MUSB_HDRC
383cf4e8	273	if (is_otg_enabled(musb) \|\| is_peripheral_enabled(musb))
7acc6197 HH	274	if (musb->gadget_driver)
	275	#endif
	276	{
	277	pm_runtime_mark_last_busy(musb->controller);
	278	pm_runtime_put_autosuspend(musb->controller);
	279	}
	280
594632ef HH	281	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	282	if (musb->xceiv->set_vbus)
	283	otg_set_vbus(musb->xceiv, 0);
	284	}
	285	otg_shutdown(musb->xceiv);
	286	break;
	287	default:
	288	DBG(4, "ID float\n");
	289	return NOTIFY_DONE;
	290	}
	291
	292	return NOTIFY_OK;
	293	}
	294
743411b3	295	static int omap2430_musb_init(struct musb *musb)
550a7375	296	{
594632ef	297	u32 l, status = 0;
ea65df57 HK	298	struct device *dev = musb->controller;
	299	struct musb_hdrc_platform_data *plat = dev->platform_data;
	300	struct omap_musb_board_data *data = plat->board_data;
550a7375	301
84e250ff DB	302	/* We require some kind of external transceiver, hooked
	303	* up through ULPI. TWL4030-family PMICs include one,
	304	* which needs a driver, drivers aren't always needed.
	305	*/
	306	musb->xceiv = otg_get_transceiver();
	307	if (!musb->xceiv) {
	308	pr_err("HS USB OTG: no transceiver configured\n");
	309	return -ENODEV;
	310	}
	311
7acc6197 HH	312	status = pm_runtime_get_sync(dev);
	313	if (status < 0) {
	314	dev_err(dev, "pm_runtime_get_sync FAILED");
	315	goto err1;
	316	}
550a7375	317
8573e6a6	318	l = musb_readl(musb->mregs, OTG_INTERFSEL);
de2e1b0c MM	319
	320	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	321	/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
	322	l &= ~ULPI_12PIN; /* Disable ULPI */
	323	l \|= UTMI_8BIT; /* Enable UTMI */
	324	} else {
	325	l \|= ULPI_12PIN;
	326	}
	327
8573e6a6	328	musb_writel(musb->mregs, OTG_INTERFSEL, l);
550a7375 FB	329
	330	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
	331	"sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
8573e6a6 FB	332	musb_readl(musb->mregs, OTG_REVISION),
	333	musb_readl(musb->mregs, OTG_SYSCONFIG),
	334	musb_readl(musb->mregs, OTG_SYSSTATUS),
	335	musb_readl(musb->mregs, OTG_INTERFSEL),
	336	musb_readl(musb->mregs, OTG_SIMENABLE));
550a7375	337
594632ef HH	338	musb->nb.notifier_call = musb_otg_notifications;
	339	status = otg_register_notifier(musb->xceiv, &musb->nb);
	340
	341	if (status)
	342	DBG(1, "notification register failed\n");
	343
550a7375 FB	344	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
	345
	346	return 0;
7acc6197 HH	347
	348	err1:
	349	pm_runtime_disable(dev);
	350	return status;
550a7375 FB	351	}
550a7375 FB	352
002eda13 HH	353	static void omap2430_musb_enable(struct musb *musb)
	354	{
	355	u8 devctl;
	356	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	357	struct device *dev = musb->controller;
	358	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	359	struct omap_musb_board_data *data = pdata->board_data;
	360
	361	switch (musb->xceiv->last_event) {
	362
	363	case USB_EVENT_ID:
	364	otg_init(musb->xceiv);
	365	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	366	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	367	/* start the session */
	368	devctl \|= MUSB_DEVCTL_SESSION;
	369	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	370	while (musb_readb(musb->mregs, MUSB_DEVCTL) &
	371	MUSB_DEVCTL_BDEVICE) {
	372	cpu_relax();
	373
	374	if (time_after(jiffies, timeout)) {
	375	dev_err(musb->controller,
	376	"configured as A device timeout");
	377	break;
	378	}
	379	}
	380	}
	381	break;
	382
	383	case USB_EVENT_VBUS:
	384	otg_init(musb->xceiv);
	385	break;
	386
	387	default:
	388	break;
	389	}
	390	}
	391
	392	static void omap2430_musb_disable(struct musb *musb)
	393	{
	394	if (musb->xceiv->last_event)
	395	otg_shutdown(musb->xceiv);
550a7375 FB	396	}
550a7375 FB	397
743411b3	398	static int omap2430_musb_exit(struct musb *musb)
550a7375	399	{
19b9a83e	400	del_timer_sync(&musb_idle_timer);
550a7375	401
c20aebb9	402	omap2430_low_level_exit(musb);
f4053874	403	otg_put_transceiver(musb->xceiv);
c20aebb9	404
550a7375 FB	405	return 0;
550a7375 FB	406	}
743411b3	407
f7ec9437	408	static const struct musb_platform_ops omap2430_ops = {
743411b3 FB	409	.init = omap2430_musb_init,
	410	.exit = omap2430_musb_exit,
	411
743411b3 FB	412	.set_mode = omap2430_musb_set_mode,
	413	.try_idle = omap2430_musb_try_idle,
	414
	415	.set_vbus = omap2430_musb_set_vbus,
002eda13 HH	416
	417	.enable = omap2430_musb_enable,
	418	.disable = omap2430_musb_disable,
743411b3	419	};
dc09886b FB	420
	421	static u64 omap2430_dmamask = DMA_BIT_MASK(32);
	422
	423	static int __init omap2430_probe(struct platform_device *pdev)
	424	{
	425	struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
	426	struct platform_device *musb;
a3cee12a	427	struct omap2430_glue *glue;
dc09886b FB	428	int ret = -ENOMEM;
dc09886b FB	429
a3cee12a FB	430	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	431	if (!glue) {
	432	dev_err(&pdev->dev, "failed to allocate glue context\n");
	433	goto err0;
	434	}
	435
dc09886b FB	436	musb = platform_device_alloc("musb-hdrc", -1);
	437	if (!musb) {
	438	dev_err(&pdev->dev, "failed to allocate musb device\n");
a3cee12a	439	goto err1;
dc09886b FB	440	}
	441
	442	musb->dev.parent = &pdev->dev;
	443	musb->dev.dma_mask = &omap2430_dmamask;
	444	musb->dev.coherent_dma_mask = omap2430_dmamask;
	445
a3cee12a FB	446	glue->dev = &pdev->dev;
	447	glue->musb = musb;
	448
f7ec9437 FB	449	pdata->platform_ops = &omap2430_ops;
f7ec9437 FB	450
a3cee12a	451	platform_set_drvdata(pdev, glue);
dc09886b FB	452
	453	ret = platform_device_add_resources(musb, pdev->resource,
	454	pdev->num_resources);
	455	if (ret) {
	456	dev_err(&pdev->dev, "failed to add resources\n");
207b0e1f	457	goto err2;
dc09886b FB	458	}
	459
	460	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	461	if (ret) {
	462	dev_err(&pdev->dev, "failed to add platform_data\n");
207b0e1f	463	goto err2;
dc09886b FB	464	}
	465
	466	ret = platform_device_add(musb);
	467	if (ret) {
	468	dev_err(&pdev->dev, "failed to register musb device\n");
207b0e1f	469	goto err2;
dc09886b FB	470	}
dc09886b FB	471
207b0e1f	472	pm_runtime_enable(&pdev->dev);
03491761	473
207b0e1f	474	return 0;
03491761	475
a3cee12a	476	err2:
dc09886b FB	477	platform_device_put(musb);
dc09886b FB	478
a3cee12a FB	479	err1:
	480	kfree(glue);
	481
dc09886b FB	482	err0:
	483	return ret;
	484	}
	485
	486	static int __exit omap2430_remove(struct platform_device *pdev)
	487	{
a3cee12a	488	struct omap2430_glue *glue = platform_get_drvdata(pdev);
dc09886b	489
a3cee12a FB	490	platform_device_del(glue->musb);
a3cee12a FB	491	platform_device_put(glue->musb);
207b0e1f HH	492	pm_runtime_put(&pdev->dev);
207b0e1f HH	493	pm_runtime_disable(&pdev->dev);
a3cee12a	494	kfree(glue);
dc09886b FB	495
	496	return 0;
	497	}
	498
c20aebb9	499	#ifdef CONFIG_PM
c20aebb9	500
7acc6197	501	static int omap2430_runtime_suspend(struct device *dev)
c20aebb9 FB	502	{
	503	struct omap2430_glue *glue = dev_get_drvdata(dev);
	504	struct musb *musb = glue_to_musb(glue);
	505
	506	omap2430_low_level_exit(musb);
	507	otg_set_suspend(musb->xceiv, 1);
c20aebb9 FB	508
	509	return 0;
	510	}
	511
7acc6197	512	static int omap2430_runtime_resume(struct device *dev)
c20aebb9 FB	513	{
	514	struct omap2430_glue *glue = dev_get_drvdata(dev);
	515	struct musb *musb = glue_to_musb(glue);
c20aebb9 FB	516
c20aebb9 FB	517	omap2430_low_level_init(musb);
c20aebb9 FB	518	otg_set_suspend(musb->xceiv, 0);
	519
	520	return 0;
	521	}
	522
	523	static struct dev_pm_ops omap2430_pm_ops = {
7acc6197 HH	524	.runtime_suspend = omap2430_runtime_suspend,
7acc6197 HH	525	.runtime_resume = omap2430_runtime_resume,
c20aebb9 FB	526	};
	527
	528	#define DEV_PM_OPS (&omap2430_pm_ops)
	529	#else
	530	#define DEV_PM_OPS NULL
	531	#endif
	532
dc09886b FB	533	static struct platform_driver omap2430_driver = {
	534	.remove = __exit_p(omap2430_remove),
	535	.driver = {
	536	.name = "musb-omap2430",
c20aebb9	537	.pm = DEV_PM_OPS,
dc09886b FB	538	},
	539	};
	540
	541	MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
	542	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
	543	MODULE_LICENSE("GPL v2");
	544
	545	static int __init omap2430_init(void)
	546	{
	547	return platform_driver_probe(&omap2430_driver, omap2430_probe);
	548	}
	549	subsys_initcall(omap2430_init);
	550
	551	static void __exit omap2430_exit(void)
	552	{
	553	platform_driver_unregister(&omap2430_driver);
	554	}
	555	module_exit(omap2430_exit);