[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;
	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)
{
	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);

	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);
}

/* 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:
		dev_dbg(musb->controller, "ID GND\n");

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

	case USB_EVENT_VBUS:
		dev_dbg(musb->controller, "VBUS Connect\n");

		if (musb->gadget_driver)
			pm_runtime_get_sync(musb->controller);
		otg_init(musb->xceiv);
		break;

	case USB_EVENT_NONE:
		dev_dbg(musb->controller, "VBUS Disconnect\n");

		if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
			if (musb->gadget_driver) {
				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:
		dev_dbg(musb->controller, "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)
		dev_dbg(musb->controller, "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);

	musb->context.otg_interfsel = musb_readl(musb->mregs,
						OTG_INTERFSEL);

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

	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;
	54	u8 power;
	55	u8 devctl;
	56
550a7375 FB	57	spin_lock_irqsave(&musb->lock, flags);
550a7375 FB	58
84e250ff	59	switch (musb->xceiv->state) {
550a7375	60	case OTG_STATE_A_WAIT_BCON:
550a7375 FB	61
	62	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	63	if (devctl & MUSB_DEVCTL_BDEVICE) {
84e250ff	64	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	65	MUSB_DEV_MODE(musb);
550a7375 FB	66	} else {
84e250ff	67	musb->xceiv->state = OTG_STATE_A_IDLE;
550a7375 FB	68	MUSB_HST_MODE(musb);
	69	}
	70	break;
550a7375 FB	71	case OTG_STATE_A_SUSPEND:
	72	/* finish RESUME signaling? */
	73	if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
	74	power = musb_readb(musb->mregs, MUSB_POWER);
	75	power &= ~MUSB_POWER_RESUME;
5c8a86e1	76	dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
550a7375 FB	77	musb_writeb(musb->mregs, MUSB_POWER, power);
	78	musb->is_active = 1;
	79	musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
	80	\| MUSB_PORT_STAT_RESUME);
	81	musb->port1_status \|= USB_PORT_STAT_C_SUSPEND << 16;
	82	usb_hcd_poll_rh_status(musb_to_hcd(musb));
	83	/* NOTE: it might really be A_WAIT_BCON ... */
84e250ff	84	musb->xceiv->state = OTG_STATE_A_HOST;
550a7375 FB	85	}
550a7375 FB	86	break;
550a7375 FB	87	case OTG_STATE_A_HOST:
	88	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	89	if (devctl & MUSB_DEVCTL_BDEVICE)
84e250ff	90	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375	91	else
84e250ff	92	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
550a7375 FB	93	default:
	94	break;
	95	}
	96	spin_unlock_irqrestore(&musb->lock, flags);
	97	}
	98
	99
743411b3	100	static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
550a7375 FB	101	{
	102	unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
	103	static unsigned long last_timer;
	104
	105	if (timeout == 0)
	106	timeout = default_timeout;
	107
	108	/* Never idle if active, or when VBUS timeout is not set as host */
	109	if (musb->is_active \|\| ((musb->a_wait_bcon == 0)
84e250ff	110	&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
5c8a86e1	111	dev_dbg(musb->controller, "%s active, deleting timer\n",
3df00453	112	otg_state_string(musb->xceiv->state));
550a7375 FB	113	del_timer(&musb_idle_timer);
	114	last_timer = jiffies;
	115	return;
	116	}
	117
	118	if (time_after(last_timer, timeout)) {
	119	if (!timer_pending(&musb_idle_timer))
	120	last_timer = timeout;
	121	else {
5c8a86e1	122	dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
550a7375 FB	123	return;
	124	}
	125	}
	126	last_timer = timeout;
	127
5c8a86e1	128	dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
3df00453	129	otg_state_string(musb->xceiv->state),
550a7375 FB	130	(unsigned long)jiffies_to_msecs(timeout - jiffies));
	131	mod_timer(&musb_idle_timer, timeout);
	132	}
	133
743411b3	134	static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
550a7375 FB	135	{
550a7375 FB	136	u8 devctl;
594632ef HH	137	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
594632ef HH	138	int ret = 1;
550a7375 FB	139	/* HDRC controls CPEN, but beware current surges during device
	140	* connect. They can trigger transient overcurrent conditions
	141	* that must be ignored.
	142	*/
	143
	144	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	145
	146	if (is_on) {
594632ef HH	147	if (musb->xceiv->state == OTG_STATE_A_IDLE) {
	148	/* start the session */
	149	devctl \|= MUSB_DEVCTL_SESSION;
	150	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	151	/*
	152	* Wait for the musb to set as A device to enable the
	153	* VBUS
	154	*/
	155	while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
	156
	157	cpu_relax();
	158
	159	if (time_after(jiffies, timeout)) {
	160	dev_err(musb->controller,
	161	"configured as A device timeout");
	162	ret = -EINVAL;
	163	break;
	164	}
	165	}
	166
	167	if (ret && musb->xceiv->set_vbus)
	168	otg_set_vbus(musb->xceiv, 1);
	169	} else {
	170	musb->is_active = 1;
	171	musb->xceiv->default_a = 1;
	172	musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
	173	devctl \|= MUSB_DEVCTL_SESSION;
	174	MUSB_HST_MODE(musb);
	175	}
550a7375 FB	176	} else {
	177	musb->is_active = 0;
	178
	179	/* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
	180	* jumping right to B_IDLE...
	181	*/
	182
84e250ff DB	183	musb->xceiv->default_a = 0;
84e250ff DB	184	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	185	devctl &= ~MUSB_DEVCTL_SESSION;
	186
	187	MUSB_DEV_MODE(musb);
	188	}
	189	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	190
5c8a86e1	191	dev_dbg(musb->controller, "VBUS %s, devctl %02x "
550a7375	192	/* otg %3x conf %08x prcm %08x */ "\n",
3df00453	193	otg_state_string(musb->xceiv->state),
550a7375 FB	194	musb_readb(musb->mregs, MUSB_DEVCTL));
550a7375 FB	195	}
550a7375	196
743411b3	197	static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
550a7375 FB	198	{
	199	u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	200
	201	devctl \|= MUSB_DEVCTL_SESSION;
	202	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	203
96a274d1	204	return 0;
550a7375 FB	205	}
550a7375 FB	206
c20aebb9 FB	207	static inline void omap2430_low_level_exit(struct musb *musb)
	208	{
	209	u32 l;
	210
	211	/* in any role */
	212	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	213	l \|= ENABLEFORCE; /* enable MSTANDBY */
	214	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
c20aebb9 FB	215	}
	216
	217	static inline void omap2430_low_level_init(struct musb *musb)
	218	{
	219	u32 l;
	220
c20aebb9 FB	221	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	222	l &= ~ENABLEFORCE; /* disable MSTANDBY */
	223	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
	224	}
	225
594632ef HH	226	/* blocking notifier support */
	227	static int musb_otg_notifications(struct notifier_block *nb,
	228	unsigned long event, void *unused)
	229	{
	230	struct musb *musb = container_of(nb, struct musb, nb);
	231	struct device *dev = musb->controller;
	232	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	233	struct omap_musb_board_data *data = pdata->board_data;
	234
	235	switch (event) {
	236	case USB_EVENT_ID:
5c8a86e1	237	dev_dbg(musb->controller, "ID GND\n");
594632ef HH	238
594632ef HH	239	if (is_otg_enabled(musb)) {
594632ef	240	if (musb->gadget_driver) {
7acc6197	241	pm_runtime_get_sync(musb->controller);
594632ef	242	otg_init(musb->xceiv);
70045c57	243	omap2430_musb_set_vbus(musb, 1);
594632ef	244	}
594632ef	245	} else {
7acc6197	246	pm_runtime_get_sync(musb->controller);
594632ef	247	otg_init(musb->xceiv);
70045c57	248	omap2430_musb_set_vbus(musb, 1);
594632ef HH	249	}
	250	break;
	251
	252	case USB_EVENT_VBUS:
5c8a86e1	253	dev_dbg(musb->controller, "VBUS Connect\n");
594632ef	254
7acc6197 HH	255	if (musb->gadget_driver)
7acc6197 HH	256	pm_runtime_get_sync(musb->controller);
594632ef HH	257	otg_init(musb->xceiv);
	258	break;
	259
	260	case USB_EVENT_NONE:
5c8a86e1	261	dev_dbg(musb->controller, "VBUS Disconnect\n");
594632ef	262
383cf4e8	263	if (is_otg_enabled(musb) \|\| is_peripheral_enabled(musb))
62285963	264	if (musb->gadget_driver) {
7acc6197 HH	265	pm_runtime_mark_last_busy(musb->controller);
	266	pm_runtime_put_autosuspend(musb->controller);
	267	}
	268
594632ef HH	269	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	270	if (musb->xceiv->set_vbus)
	271	otg_set_vbus(musb->xceiv, 0);
	272	}
	273	otg_shutdown(musb->xceiv);
	274	break;
	275	default:
5c8a86e1	276	dev_dbg(musb->controller, "ID float\n");
594632ef HH	277	return NOTIFY_DONE;
	278	}
	279
	280	return NOTIFY_OK;
	281	}
	282
743411b3	283	static int omap2430_musb_init(struct musb *musb)
550a7375	284	{
594632ef	285	u32 l, status = 0;
ea65df57 HK	286	struct device *dev = musb->controller;
	287	struct musb_hdrc_platform_data *plat = dev->platform_data;
	288	struct omap_musb_board_data *data = plat->board_data;
550a7375	289
84e250ff DB	290	/* We require some kind of external transceiver, hooked
	291	* up through ULPI. TWL4030-family PMICs include one,
	292	* which needs a driver, drivers aren't always needed.
	293	*/
	294	musb->xceiv = otg_get_transceiver();
	295	if (!musb->xceiv) {
	296	pr_err("HS USB OTG: no transceiver configured\n");
	297	return -ENODEV;
	298	}
	299
7acc6197 HH	300	status = pm_runtime_get_sync(dev);
	301	if (status < 0) {
	302	dev_err(dev, "pm_runtime_get_sync FAILED");
	303	goto err1;
	304	}
550a7375	305
8573e6a6	306	l = musb_readl(musb->mregs, OTG_INTERFSEL);
de2e1b0c MM	307
	308	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	309	/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
	310	l &= ~ULPI_12PIN; /* Disable ULPI */
	311	l \|= UTMI_8BIT; /* Enable UTMI */
	312	} else {
	313	l \|= ULPI_12PIN;
	314	}
	315
8573e6a6	316	musb_writel(musb->mregs, OTG_INTERFSEL, l);
550a7375 FB	317
	318	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
	319	"sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
8573e6a6 FB	320	musb_readl(musb->mregs, OTG_REVISION),
	321	musb_readl(musb->mregs, OTG_SYSCONFIG),
	322	musb_readl(musb->mregs, OTG_SYSSTATUS),
	323	musb_readl(musb->mregs, OTG_INTERFSEL),
	324	musb_readl(musb->mregs, OTG_SIMENABLE));
550a7375	325
594632ef HH	326	musb->nb.notifier_call = musb_otg_notifications;
	327	status = otg_register_notifier(musb->xceiv, &musb->nb);
	328
	329	if (status)
5c8a86e1	330	dev_dbg(musb->controller, "notification register failed\n");
594632ef	331
550a7375 FB	332	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
	333
	334	return 0;
7acc6197 HH	335
	336	err1:
	337	pm_runtime_disable(dev);
	338	return status;
550a7375 FB	339	}
550a7375 FB	340
002eda13 HH	341	static void omap2430_musb_enable(struct musb *musb)
	342	{
	343	u8 devctl;
	344	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	345	struct device *dev = musb->controller;
	346	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	347	struct omap_musb_board_data *data = pdata->board_data;
	348
	349	switch (musb->xceiv->last_event) {
	350
	351	case USB_EVENT_ID:
	352	otg_init(musb->xceiv);
	353	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	354	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	355	/* start the session */
	356	devctl \|= MUSB_DEVCTL_SESSION;
	357	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	358	while (musb_readb(musb->mregs, MUSB_DEVCTL) &
	359	MUSB_DEVCTL_BDEVICE) {
	360	cpu_relax();
	361
	362	if (time_after(jiffies, timeout)) {
	363	dev_err(musb->controller,
	364	"configured as A device timeout");
	365	break;
	366	}
	367	}
	368	}
	369	break;
	370
	371	case USB_EVENT_VBUS:
	372	otg_init(musb->xceiv);
	373	break;
	374
	375	default:
	376	break;
	377	}
	378	}
	379
	380	static void omap2430_musb_disable(struct musb *musb)
	381	{
	382	if (musb->xceiv->last_event)
	383	otg_shutdown(musb->xceiv);
550a7375 FB	384	}
550a7375 FB	385
743411b3	386	static int omap2430_musb_exit(struct musb *musb)
550a7375	387	{
19b9a83e	388	del_timer_sync(&musb_idle_timer);
550a7375	389
c20aebb9	390	omap2430_low_level_exit(musb);
f4053874	391	otg_put_transceiver(musb->xceiv);
c20aebb9	392
550a7375 FB	393	return 0;
550a7375 FB	394	}
743411b3	395
f7ec9437	396	static const struct musb_platform_ops omap2430_ops = {
743411b3 FB	397	.init = omap2430_musb_init,
	398	.exit = omap2430_musb_exit,
	399
743411b3 FB	400	.set_mode = omap2430_musb_set_mode,
	401	.try_idle = omap2430_musb_try_idle,
	402
	403	.set_vbus = omap2430_musb_set_vbus,
002eda13 HH	404
	405	.enable = omap2430_musb_enable,
	406	.disable = omap2430_musb_disable,
743411b3	407	};
dc09886b FB	408
	409	static u64 omap2430_dmamask = DMA_BIT_MASK(32);
	410
	411	static int __init omap2430_probe(struct platform_device *pdev)
	412	{
	413	struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
	414	struct platform_device *musb;
a3cee12a	415	struct omap2430_glue *glue;
dc09886b FB	416	int ret = -ENOMEM;
dc09886b FB	417
a3cee12a FB	418	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	419	if (!glue) {
	420	dev_err(&pdev->dev, "failed to allocate glue context\n");
	421	goto err0;
	422	}
	423
dc09886b FB	424	musb = platform_device_alloc("musb-hdrc", -1);
	425	if (!musb) {
	426	dev_err(&pdev->dev, "failed to allocate musb device\n");
a3cee12a	427	goto err1;
dc09886b FB	428	}
	429
	430	musb->dev.parent = &pdev->dev;
	431	musb->dev.dma_mask = &omap2430_dmamask;
	432	musb->dev.coherent_dma_mask = omap2430_dmamask;
	433
a3cee12a FB	434	glue->dev = &pdev->dev;
	435	glue->musb = musb;
	436
f7ec9437 FB	437	pdata->platform_ops = &omap2430_ops;
f7ec9437 FB	438
a3cee12a	439	platform_set_drvdata(pdev, glue);
dc09886b FB	440
	441	ret = platform_device_add_resources(musb, pdev->resource,
	442	pdev->num_resources);
	443	if (ret) {
	444	dev_err(&pdev->dev, "failed to add resources\n");
207b0e1f	445	goto err2;
dc09886b FB	446	}
	447
	448	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	449	if (ret) {
	450	dev_err(&pdev->dev, "failed to add platform_data\n");
207b0e1f	451	goto err2;
dc09886b FB	452	}
	453
	454	ret = platform_device_add(musb);
	455	if (ret) {
	456	dev_err(&pdev->dev, "failed to register musb device\n");
207b0e1f	457	goto err2;
dc09886b FB	458	}
dc09886b FB	459
207b0e1f	460	pm_runtime_enable(&pdev->dev);
03491761	461
207b0e1f	462	return 0;
03491761	463
a3cee12a	464	err2:
dc09886b FB	465	platform_device_put(musb);
dc09886b FB	466
a3cee12a FB	467	err1:
	468	kfree(glue);
	469
dc09886b FB	470	err0:
	471	return ret;
	472	}
	473
	474	static int __exit omap2430_remove(struct platform_device *pdev)
	475	{
a3cee12a	476	struct omap2430_glue *glue = platform_get_drvdata(pdev);
dc09886b	477
a3cee12a FB	478	platform_device_del(glue->musb);
a3cee12a FB	479	platform_device_put(glue->musb);
207b0e1f HH	480	pm_runtime_put(&pdev->dev);
207b0e1f HH	481	pm_runtime_disable(&pdev->dev);
a3cee12a	482	kfree(glue);
dc09886b FB	483
	484	return 0;
	485	}
	486
c20aebb9	487	#ifdef CONFIG_PM
c20aebb9	488
7acc6197	489	static int omap2430_runtime_suspend(struct device *dev)
c20aebb9 FB	490	{
	491	struct omap2430_glue *glue = dev_get_drvdata(dev);
	492	struct musb *musb = glue_to_musb(glue);
	493
e25bec16 HH	494	musb->context.otg_interfsel = musb_readl(musb->mregs,
	495	OTG_INTERFSEL);
	496
c20aebb9 FB	497	omap2430_low_level_exit(musb);
c20aebb9 FB	498	otg_set_suspend(musb->xceiv, 1);
c20aebb9 FB	499
	500	return 0;
	501	}
	502
7acc6197	503	static int omap2430_runtime_resume(struct device *dev)
c20aebb9 FB	504	{
	505	struct omap2430_glue *glue = dev_get_drvdata(dev);
	506	struct musb *musb = glue_to_musb(glue);
c20aebb9 FB	507
c20aebb9 FB	508	omap2430_low_level_init(musb);
e25bec16 HH	509	musb_writel(musb->mregs, OTG_INTERFSEL,
	510	musb->context.otg_interfsel);
	511
c20aebb9 FB	512	otg_set_suspend(musb->xceiv, 0);
	513
	514	return 0;
	515	}
	516
	517	static struct dev_pm_ops omap2430_pm_ops = {
7acc6197 HH	518	.runtime_suspend = omap2430_runtime_suspend,
7acc6197 HH	519	.runtime_resume = omap2430_runtime_resume,
c20aebb9 FB	520	};
	521
	522	#define DEV_PM_OPS (&omap2430_pm_ops)
	523	#else
	524	#define DEV_PM_OPS NULL
	525	#endif
	526
dc09886b FB	527	static struct platform_driver omap2430_driver = {
	528	.remove = __exit_p(omap2430_remove),
	529	.driver = {
	530	.name = "musb-omap2430",
c20aebb9	531	.pm = DEV_PM_OPS,
dc09886b FB	532	},
	533	};
	534
	535	MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
	536	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
	537	MODULE_LICENSE("GPL v2");
	538
	539	static int __init omap2430_init(void)
	540	{
	541	return platform_driver_probe(&omap2430_driver, omap2430_probe);
	542	}
	543	subsys_initcall(omap2430_init);
	544
	545	static void __exit omap2430_exit(void)
	546	{
	547	platform_driver_unregister(&omap2430_driver);
	548	}
	549	module_exit(omap2430_exit);