[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/io.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/err.h>
#include <linux/usb/musb-omap.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;
};
#define glue_to_musb(g)		platform_get_drvdata(g->musb)

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->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;
	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_to_hcd(musb));
			/* NOTE: it might really be A_WAIT_BCON ... */
			musb->xceiv->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->state = OTG_STATE_B_IDLE;
		else
			musb->xceiv->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->state == OTG_STATE_A_WAIT_BCON))) {
		dev_dbg(musb->controller, "%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 {
			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",
		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)
{
	struct usb_otg	*otg = musb->xceiv->otg;
	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 && otg->set_vbus)
				otg_set_vbus(otg, 1);
		} else {
			musb->is_active = 1;
			otg->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...
		 */

		otg->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);

	dev_dbg(musb->controller, "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);
}

void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
{
	struct omap2430_glue	*glue = _glue;
	struct musb		*musb = glue_to_musb(glue);

	glue->status = status;
	if (!musb) {
		dev_err(glue->dev, "musb core is not yet ready\n");
		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->platform_data;
	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->state = OTG_STATE_A_IDLE;
		musb->xceiv->last_event = USB_EVENT_ID;
		if (musb->gadget_driver) {
			pm_runtime_get_sync(dev);
			usb_phy_init(musb->xceiv);
			omap2430_musb_set_vbus(musb, 1);
		}
		break;

	case OMAP_MUSB_VBUS_VALID:
		dev_dbg(dev, "VBUS Connect\n");

		otg->default_a = false;
		musb->xceiv->state = OTG_STATE_B_IDLE;
		musb->xceiv->last_event = USB_EVENT_VBUS;
		if (musb->gadget_driver)
			pm_runtime_get_sync(dev);
		usb_phy_init(musb->xceiv);
		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) {
			pm_runtime_mark_last_busy(dev);
			pm_runtime_put_autosuspend(dev);
		}

		if (data->interface_type == MUSB_INTERFACE_UTMI) {
			if (musb->xceiv->otg->set_vbus)
				otg_set_vbus(musb->xceiv->otg, 0);
		}
		usb_phy_shutdown(musb->xceiv);
		break;
	default:
		dev_dbg(dev, "ID float\n");
	}
}


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);
	omap_musb_set_mailbox(glue);
}

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->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 = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	if (IS_ERR_OR_NULL(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 %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);

	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->platform_data;
	struct omap_musb_board_data *data = pdata->board_data;

	switch (glue->status) {

	case OMAP_MUSB_ID_GROUND:
		usb_phy_init(musb->xceiv);
		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:
		usb_phy_init(musb->xceiv);
		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)
		usb_phy_shutdown(musb->xceiv);
}

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

	omap2430_low_level_exit(musb);

	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 __devinit 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 = devm_kzalloc(&pdev->dev, 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 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;

	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);

	ret = platform_device_add_resources(musb, pdev->resource,
			pdev->num_resources);
	if (ret) {
		dev_err(&pdev->dev, "failed to add resources\n");
		goto err1;
	}

	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	if (ret) {
		dev_err(&pdev->dev, "failed to add platform_data\n");
		goto err1;
	}

	pm_runtime_enable(&pdev->dev);

	ret = platform_device_add(musb);
	if (ret) {
		dev_err(&pdev->dev, "failed to register musb device\n");
		goto err1;
	}

	return 0;

err1:
	platform_device_put(musb);

err0:
	return ret;
}

static int __devexit 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);
		usb_phy_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);

	if (musb) {
		omap2430_low_level_init(musb);
		musb_writel(musb->mregs, OTG_INTERFSEL,
				musb->context.otg_interfsel);

		usb_phy_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 = {
	.probe		= omap2430_probe,
	.remove		= __devexit_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_register(&omap2430_driver);
}
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>
550a7375 FB	31	#include <linux/list.h>
550a7375	32	#include <linux/io.h>
dc09886b FB	33	#include <linux/platform_device.h>
dc09886b FB	34	#include <linux/dma-mapping.h>
207b0e1f HH	35	#include <linux/pm_runtime.h>
207b0e1f HH	36	#include <linux/err.h>
c9721438	37	#include <linux/usb/musb-omap.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;
c9721438	45	enum omap_musb_vbus_id_status status;
1e5acb8d	46	struct work_struct omap_musb_mailbox_work;
a3cee12a	47	};
c20aebb9	48	#define glue_to_musb(g) platform_get_drvdata(g->musb)
a3cee12a	49
c9721438 KVA	50	struct omap2430_glue *_glue;
c9721438 KVA	51
550a7375 FB	52	static struct timer_list musb_idle_timer;
	53
	54	static void musb_do_idle(unsigned long _musb)
	55	{
	56	struct musb musb = (void )_musb;
	57	unsigned long flags;
	58	u8 power;
	59	u8 devctl;
	60
550a7375 FB	61	spin_lock_irqsave(&musb->lock, flags);
550a7375 FB	62
84e250ff	63	switch (musb->xceiv->state) {
550a7375	64	case OTG_STATE_A_WAIT_BCON:
550a7375 FB	65
	66	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	67	if (devctl & MUSB_DEVCTL_BDEVICE) {
84e250ff	68	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	69	MUSB_DEV_MODE(musb);
550a7375 FB	70	} else {
84e250ff	71	musb->xceiv->state = OTG_STATE_A_IDLE;
550a7375 FB	72	MUSB_HST_MODE(musb);
	73	}
	74	break;
550a7375 FB	75	case OTG_STATE_A_SUSPEND:
	76	/* finish RESUME signaling? */
	77	if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
	78	power = musb_readb(musb->mregs, MUSB_POWER);
	79	power &= ~MUSB_POWER_RESUME;
5c8a86e1	80	dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
550a7375 FB	81	musb_writeb(musb->mregs, MUSB_POWER, power);
	82	musb->is_active = 1;
	83	musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
	84	\| MUSB_PORT_STAT_RESUME);
	85	musb->port1_status \|= USB_PORT_STAT_C_SUSPEND << 16;
	86	usb_hcd_poll_rh_status(musb_to_hcd(musb));
	87	/* NOTE: it might really be A_WAIT_BCON ... */
84e250ff	88	musb->xceiv->state = OTG_STATE_A_HOST;
550a7375 FB	89	}
550a7375 FB	90	break;
550a7375 FB	91	case OTG_STATE_A_HOST:
	92	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	93	if (devctl & MUSB_DEVCTL_BDEVICE)
84e250ff	94	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375	95	else
84e250ff	96	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
550a7375 FB	97	default:
	98	break;
	99	}
	100	spin_unlock_irqrestore(&musb->lock, flags);
	101	}
	102
	103
743411b3	104	static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
550a7375 FB	105	{
	106	unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
	107	static unsigned long last_timer;
	108
	109	if (timeout == 0)
	110	timeout = default_timeout;
	111
	112	/* Never idle if active, or when VBUS timeout is not set as host */
	113	if (musb->is_active \|\| ((musb->a_wait_bcon == 0)
84e250ff	114	&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
5c8a86e1	115	dev_dbg(musb->controller, "%s active, deleting timer\n",
3df00453	116	otg_state_string(musb->xceiv->state));
550a7375 FB	117	del_timer(&musb_idle_timer);
	118	last_timer = jiffies;
	119	return;
	120	}
	121
	122	if (time_after(last_timer, timeout)) {
	123	if (!timer_pending(&musb_idle_timer))
	124	last_timer = timeout;
	125	else {
5c8a86e1	126	dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
550a7375 FB	127	return;
	128	}
	129	}
	130	last_timer = timeout;
	131
5c8a86e1	132	dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
3df00453	133	otg_state_string(musb->xceiv->state),
550a7375 FB	134	(unsigned long)jiffies_to_msecs(timeout - jiffies));
	135	mod_timer(&musb_idle_timer, timeout);
	136	}
	137
743411b3	138	static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
550a7375	139	{
d445b6da	140	struct usb_otg *otg = musb->xceiv->otg;
550a7375	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
6e13c650 HK	172	if (ret && otg->set_vbus)
6e13c650 HK	173	otg_set_vbus(otg, 1);
594632ef HH	174	} else {
594632ef HH	175	musb->is_active = 1;
d445b6da	176	otg->default_a = 1;
594632ef HH	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
d445b6da	188	otg->default_a = 0;
84e250ff	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
5c8a86e1	196	dev_dbg(musb->controller, "VBUS %s, devctl %02x "
550a7375	197	/* otg %3x conf %08x prcm %08x */ "\n",
3df00453	198	otg_state_string(musb->xceiv->state),
550a7375 FB	199	musb_readb(musb->mregs, MUSB_DEVCTL));
550a7375 FB	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
c9721438	231	void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
594632ef	232	{
c9721438 KVA	233	struct omap2430_glue *glue = _glue;
c9721438 KVA	234	struct musb *musb = glue_to_musb(glue);
712d8efa	235
c9721438 KVA	236	glue->status = status;
	237	if (!musb) {
	238	dev_err(glue->dev, "musb core is not yet ready\n");
	239	return;
	240	}
712d8efa	241
c9721438	242	schedule_work(&glue->omap_musb_mailbox_work);
712d8efa	243	}
c9721438	244	EXPORT_SYMBOL_GPL(omap_musb_mailbox);
712d8efa	245
c9721438	246	static void omap_musb_set_mailbox(struct omap2430_glue *glue)
712d8efa	247	{
1e5acb8d	248	struct musb *musb = glue_to_musb(glue);
594632ef HH	249	struct device *dev = musb->controller;
	250	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	251	struct omap_musb_board_data *data = pdata->board_data;
c83a8542	252	struct usb_otg *otg = musb->xceiv->otg;
594632ef	253
c9721438 KVA	254	switch (glue->status) {
	255	case OMAP_MUSB_ID_GROUND:
	256	dev_dbg(dev, "ID GND\n");
594632ef	257
c83a8542 KVA	258	otg->default_a = true;
c83a8542 KVA	259	musb->xceiv->state = OTG_STATE_A_IDLE;
c9721438	260	musb->xceiv->last_event = USB_EVENT_ID;
032ec49f	261	if (musb->gadget_driver) {
c9721438	262	pm_runtime_get_sync(dev);
b96d3b08	263	usb_phy_init(musb->xceiv);
70045c57	264	omap2430_musb_set_vbus(musb, 1);
594632ef HH	265	}
	266	break;
	267
c9721438 KVA	268	case OMAP_MUSB_VBUS_VALID:
c9721438 KVA	269	dev_dbg(dev, "VBUS Connect\n");
594632ef	270
c83a8542 KVA	271	otg->default_a = false;
c83a8542 KVA	272	musb->xceiv->state = OTG_STATE_B_IDLE;
c9721438	273	musb->xceiv->last_event = USB_EVENT_VBUS;
7acc6197	274	if (musb->gadget_driver)
c9721438	275	pm_runtime_get_sync(dev);
b96d3b08	276	usb_phy_init(musb->xceiv);
594632ef HH	277	break;
594632ef HH	278
c9721438 KVA	279	case OMAP_MUSB_ID_FLOAT:
	280	case OMAP_MUSB_VBUS_OFF:
	281	dev_dbg(dev, "VBUS Disconnect\n");
594632ef	282
c9721438	283	musb->xceiv->last_event = USB_EVENT_NONE;
032ec49f FB	284	if (musb->gadget_driver) {
	285	pm_runtime_mark_last_busy(dev);
	286	pm_runtime_put_autosuspend(dev);
	287	}
7acc6197	288
594632ef	289	if (data->interface_type == MUSB_INTERFACE_UTMI) {
6e13c650 HK	290	if (musb->xceiv->otg->set_vbus)
6e13c650 HK	291	otg_set_vbus(musb->xceiv->otg, 0);
594632ef	292	}
b96d3b08	293	usb_phy_shutdown(musb->xceiv);
594632ef HH	294	break;
594632ef HH	295	default:
c9721438	296	dev_dbg(dev, "ID float\n");
594632ef	297	}
594632ef HH	298	}
594632ef HH	299
c9721438 KVA	300
	301	static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
	302	{
	303	struct omap2430_glue *glue = container_of(mailbox_work,
	304	struct omap2430_glue, omap_musb_mailbox_work);
	305	omap_musb_set_mailbox(glue);
	306	}
	307
743411b3	308	static int omap2430_musb_init(struct musb *musb)
550a7375	309	{
ad579699 S	310	u32 l;
ad579699 S	311	int status = 0;
ea65df57	312	struct device *dev = musb->controller;
c9721438	313	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
ea65df57 HK	314	struct musb_hdrc_platform_data *plat = dev->platform_data;
ea65df57 HK	315	struct omap_musb_board_data *data = plat->board_data;
550a7375	316
84e250ff DB	317	/* We require some kind of external transceiver, hooked
	318	* up through ULPI. TWL4030-family PMICs include one,
	319	* which needs a driver, drivers aren't always needed.
	320	*/
b1183c24	321	musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
ded017ee	322	if (IS_ERR_OR_NULL(musb->xceiv)) {
84e250ff DB	323	pr_err("HS USB OTG: no transceiver configured\n");
	324	return -ENODEV;
	325	}
	326
7acc6197 HH	327	status = pm_runtime_get_sync(dev);
7acc6197 HH	328	if (status < 0) {
ad579699	329	dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
7acc6197 HH	330	goto err1;
7acc6197 HH	331	}
550a7375	332
8573e6a6	333	l = musb_readl(musb->mregs, OTG_INTERFSEL);
de2e1b0c MM	334
	335	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	336	/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
	337	l &= ~ULPI_12PIN; /* Disable ULPI */
	338	l \|= UTMI_8BIT; /* Enable UTMI */
	339	} else {
	340	l \|= ULPI_12PIN;
	341	}
	342
8573e6a6	343	musb_writel(musb->mregs, OTG_INTERFSEL, l);
550a7375 FB	344
	345	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
	346	"sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
8573e6a6 FB	347	musb_readl(musb->mregs, OTG_REVISION),
	348	musb_readl(musb->mregs, OTG_SYSCONFIG),
	349	musb_readl(musb->mregs, OTG_SYSSTATUS),
	350	musb_readl(musb->mregs, OTG_INTERFSEL),
	351	musb_readl(musb->mregs, OTG_SIMENABLE));
550a7375	352
550a7375 FB	353	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
550a7375 FB	354
c9721438 KVA	355	if (glue->status != OMAP_MUSB_UNKNOWN)
	356	omap_musb_set_mailbox(glue);
	357
c04352a5	358	pm_runtime_put_noidle(musb->controller);
550a7375	359	return 0;
7acc6197 HH	360
7acc6197 HH	361	err1:
7acc6197	362	return status;
550a7375 FB	363	}
550a7375 FB	364
002eda13 HH	365	static void omap2430_musb_enable(struct musb *musb)
	366	{
	367	u8 devctl;
	368	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	369	struct device *dev = musb->controller;
c9721438	370	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
002eda13 HH	371	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	372	struct omap_musb_board_data *data = pdata->board_data;
	373
c9721438	374	switch (glue->status) {
002eda13	375
c9721438	376	case OMAP_MUSB_ID_GROUND:
b96d3b08	377	usb_phy_init(musb->xceiv);
08dec56e FC	378	if (data->interface_type != MUSB_INTERFACE_UTMI)
	379	break;
	380	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	381	/* start the session */
	382	devctl \|= MUSB_DEVCTL_SESSION;
	383	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	384	while (musb_readb(musb->mregs, MUSB_DEVCTL) &
	385	MUSB_DEVCTL_BDEVICE) {
	386	cpu_relax();
	387
	388	if (time_after(jiffies, timeout)) {
	389	dev_err(dev, "configured as A device timeout");
	390	break;
002eda13 HH	391	}
	392	}
	393	break;
	394
c9721438	395	case OMAP_MUSB_VBUS_VALID:
b96d3b08	396	usb_phy_init(musb->xceiv);
002eda13 HH	397	break;
	398
	399	default:
	400	break;
	401	}
	402	}
	403
	404	static void omap2430_musb_disable(struct musb *musb)
	405	{
c9721438 KVA	406	struct device *dev = musb->controller;
	407	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	408
	409	if (glue->status != OMAP_MUSB_UNKNOWN)
b96d3b08	410	usb_phy_shutdown(musb->xceiv);
550a7375 FB	411	}
550a7375 FB	412
743411b3	413	static int omap2430_musb_exit(struct musb *musb)
550a7375	414	{
19b9a83e	415	del_timer_sync(&musb_idle_timer);
550a7375	416
c20aebb9	417	omap2430_low_level_exit(musb);
c20aebb9	418
550a7375 FB	419	return 0;
550a7375 FB	420	}
743411b3	421
f7ec9437	422	static const struct musb_platform_ops omap2430_ops = {
743411b3 FB	423	.init = omap2430_musb_init,
	424	.exit = omap2430_musb_exit,
	425
743411b3 FB	426	.set_mode = omap2430_musb_set_mode,
	427	.try_idle = omap2430_musb_try_idle,
	428
	429	.set_vbus = omap2430_musb_set_vbus,
002eda13 HH	430
	431	.enable = omap2430_musb_enable,
	432	.disable = omap2430_musb_disable,
743411b3	433	};
dc09886b FB	434
	435	static u64 omap2430_dmamask = DMA_BIT_MASK(32);
	436
e9e8c85e	437	static int __devinit omap2430_probe(struct platform_device *pdev)
dc09886b FB	438	{
	439	struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
	440	struct platform_device *musb;
a3cee12a	441	struct omap2430_glue *glue;
dc09886b FB	442	int ret = -ENOMEM;
dc09886b FB	443
b1183c24	444	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
a3cee12a FB	445	if (!glue) {
	446	dev_err(&pdev->dev, "failed to allocate glue context\n");
	447	goto err0;
	448	}
	449
dc09886b FB	450	musb = platform_device_alloc("musb-hdrc", -1);
	451	if (!musb) {
	452	dev_err(&pdev->dev, "failed to allocate musb device\n");
b1183c24	453	goto err0;
dc09886b FB	454	}
	455
	456	musb->dev.parent = &pdev->dev;
	457	musb->dev.dma_mask = &omap2430_dmamask;
	458	musb->dev.coherent_dma_mask = omap2430_dmamask;
	459
a3cee12a FB	460	glue->dev = &pdev->dev;
a3cee12a FB	461	glue->musb = musb;
c9721438	462	glue->status = OMAP_MUSB_UNKNOWN;
a3cee12a	463
f7ec9437 FB	464	pdata->platform_ops = &omap2430_ops;
f7ec9437 FB	465
a3cee12a	466	platform_set_drvdata(pdev, glue);
dc09886b	467
c9721438 KVA	468	/*
	469	* REVISIT if we ever have two instances of the wrapper, we will be
	470	* in big trouble
	471	*/
	472	_glue = glue;
	473
1e5acb8d KVA	474	INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
1e5acb8d KVA	475
dc09886b FB	476	ret = platform_device_add_resources(musb, pdev->resource,
	477	pdev->num_resources);
	478	if (ret) {
	479	dev_err(&pdev->dev, "failed to add resources\n");
b1183c24	480	goto err1;
dc09886b FB	481	}
	482
	483	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	484	if (ret) {
	485	dev_err(&pdev->dev, "failed to add platform_data\n");
b1183c24	486	goto err1;
dc09886b FB	487	}
dc09886b FB	488
3006dc8c KVA	489	pm_runtime_enable(&pdev->dev);
3006dc8c KVA	490
dc09886b FB	491	ret = platform_device_add(musb);
	492	if (ret) {
	493	dev_err(&pdev->dev, "failed to register musb device\n");
b1183c24	494	goto err1;
dc09886b FB	495	}
dc09886b FB	496
207b0e1f	497	return 0;
03491761	498
a3cee12a	499	err1:
b1183c24	500	platform_device_put(musb);
a3cee12a	501
dc09886b FB	502	err0:
	503	return ret;
	504	}
	505
e9e8c85e	506	static int __devexit omap2430_remove(struct platform_device *pdev)
dc09886b	507	{
a3cee12a	508	struct omap2430_glue *glue = platform_get_drvdata(pdev);
dc09886b	509
1e5acb8d	510	cancel_work_sync(&glue->omap_musb_mailbox_work);
f039df58	511	platform_device_unregister(glue->musb);
dc09886b FB	512
	513	return 0;
	514	}
	515
c20aebb9	516	#ifdef CONFIG_PM
c20aebb9	517
7acc6197	518	static int omap2430_runtime_suspend(struct device *dev)
c20aebb9 FB	519	{
	520	struct omap2430_glue *glue = dev_get_drvdata(dev);
	521	struct musb *musb = glue_to_musb(glue);
	522
afb76df1 VZ	523	if (musb) {
	524	musb->context.otg_interfsel = musb_readl(musb->mregs,
	525	OTG_INTERFSEL);
e25bec16	526
afb76df1 VZ	527	omap2430_low_level_exit(musb);
	528	usb_phy_set_suspend(musb->xceiv, 1);
	529	}
c20aebb9 FB	530
	531	return 0;
	532	}
	533
7acc6197	534	static int omap2430_runtime_resume(struct device *dev)
c20aebb9 FB	535	{
	536	struct omap2430_glue *glue = dev_get_drvdata(dev);
	537	struct musb *musb = glue_to_musb(glue);
c20aebb9	538
afb76df1 VZ	539	if (musb) {
	540	omap2430_low_level_init(musb);
	541	musb_writel(musb->mregs, OTG_INTERFSEL,
	542	musb->context.otg_interfsel);
e25bec16	543
afb76df1 VZ	544	usb_phy_set_suspend(musb->xceiv, 0);
afb76df1 VZ	545	}
c20aebb9 FB	546
	547	return 0;
	548	}
	549
	550	static struct dev_pm_ops omap2430_pm_ops = {
7acc6197 HH	551	.runtime_suspend = omap2430_runtime_suspend,
7acc6197 HH	552	.runtime_resume = omap2430_runtime_resume,
c20aebb9 FB	553	};
	554
	555	#define DEV_PM_OPS (&omap2430_pm_ops)
	556	#else
	557	#define DEV_PM_OPS NULL
	558	#endif
	559
dc09886b	560	static struct platform_driver omap2430_driver = {
e9e8c85e FB	561	.probe = omap2430_probe,
e9e8c85e FB	562	.remove = __devexit_p(omap2430_remove),
dc09886b FB	563	.driver = {
dc09886b FB	564	.name = "musb-omap2430",
c20aebb9	565	.pm = DEV_PM_OPS,
dc09886b FB	566	},
	567	};
	568
	569	MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
	570	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
	571	MODULE_LICENSE("GPL v2");
	572
	573	static int __init omap2430_init(void)
	574	{
e9e8c85e	575	return platform_driver_register(&omap2430_driver);
dc09886b	576	}
c9721438	577	subsys_initcall(omap2430_init);
dc09886b FB	578
	579	static void __exit omap2430_exit(void)
	580	{
	581	platform_driver_unregister(&omap2430_driver);
	582	}
	583	module_exit(omap2430_exit);