[people/ms/u-boot.git] / drivers / usb / musb-new / 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
 *
 */
#ifndef __UBOOT__
#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>
#else
#include <common.h>
#include <asm/omap_musb.h>
#include <twl4030.h>
#include "linux-compat.h"
#endif

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

#ifndef __UBOOT__
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;
}
#endif

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);
}

#ifndef __UBOOT__
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 (!is_otg_enabled(musb) || 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 (is_otg_enabled(musb) || is_peripheral_enabled(musb))
			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);
}
#endif

static int omap2430_musb_init(struct musb *musb)
{
	u32 l;
	int status = 0;
	unsigned long int start;
#ifndef __UBOOT__
	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;
#else
	struct omap_musb_board_data *data =
		(struct omap_musb_board_data *)musb->controller;
#endif

	/* Reset the controller */
	musb_writel(musb->mregs, OTG_SYSCONFIG, SOFTRST);

	start = get_timer(0);

	while (1) {
		l = musb_readl(musb->mregs, OTG_SYSCONFIG);
		if ((l & SOFTRST) == 0)
			break;

		if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
			dev_err(musb->controller, "MUSB reset is taking too long\n");
			return -ENODEV;
		}
	}

#ifndef __UBOOT__
	/* 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;
	}
#endif

	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));

#ifndef __UBOOT__
	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);
#endif
	return 0;

err1:
	return status;
}

#ifndef __UBOOT__
static void omap2430_musb_enable(struct musb *musb)
#else
static int omap2430_musb_enable(struct musb *musb)
#endif
{
#ifndef __UBOOT__
	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;
	}
#else
#ifdef CONFIG_TWL4030_USB
	if (twl4030_usb_ulpi_init()) {
		serial_printf("ERROR: %s Could not initialize PHY\n",
				__PRETTY_FUNCTION__);
	}
#endif
	return 0;
#endif
}

static void omap2430_musb_disable(struct musb *musb)
{
#ifndef __UBOOT__
	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);
#endif
}

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

	omap2430_low_level_exit(musb);

	return 0;
}

#ifndef __UBOOT__
static const struct musb_platform_ops omap2430_ops = {
#else
const struct musb_platform_ops omap2430_ops = {
#endif
	.init		= omap2430_musb_init,
	.exit		= omap2430_musb_exit,

#ifndef __UBOOT__
	.set_mode	= omap2430_musb_set_mode,
	.try_idle	= omap2430_musb_try_idle,

	.set_vbus	= omap2430_musb_set_vbus,
#endif

	.enable		= omap2430_musb_enable,
	.disable	= omap2430_musb_disable,
};

#ifndef __UBOOT__
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_del(glue->musb);
	platform_device_put(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);
#endif
Commit	Line	Data
673a524b IY	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
	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	*/
673a524b IY	27	#ifndef __UBOOT__
	28	#include <linux/module.h>
	29	#include <linux/kernel.h>
	30	#include <linux/sched.h>
	31	#include <linux/init.h>
	32	#include <linux/list.h>
	33	#include <linux/io.h>
	34	#include <linux/platform_device.h>
	35	#include <linux/dma-mapping.h>
	36	#include <linux/pm_runtime.h>
	37	#include <linux/err.h>
	38	#include <linux/usb/musb-omap.h>
	39	#else
	40	#include <common.h>
	41	#include <asm/omap_musb.h>
	42	#include <twl4030.h>
	43	#include "linux-compat.h"
	44	#endif
	45
	46	#include "musb_core.h"
	47	#include "omap2430.h"
	48
	49	#ifndef __UBOOT__
	50	struct omap2430_glue {
	51	struct device *dev;
	52	struct platform_device *musb;
	53	enum omap_musb_vbus_id_status status;
	54	struct work_struct omap_musb_mailbox_work;
	55	};
	56	#define glue_to_musb(g) platform_get_drvdata(g->musb)
	57
	58	struct omap2430_glue *_glue;
	59
	60	static struct timer_list musb_idle_timer;
	61
	62	static void musb_do_idle(unsigned long _musb)
	63	{
	64	struct musb musb = (void )_musb;
	65	unsigned long flags;
	66	u8 power;
	67	u8 devctl;
	68
	69	spin_lock_irqsave(&musb->lock, flags);
	70
	71	switch (musb->xceiv->state) {
	72	case OTG_STATE_A_WAIT_BCON:
	73
	74	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	75	if (devctl & MUSB_DEVCTL_BDEVICE) {
	76	musb->xceiv->state = OTG_STATE_B_IDLE;
	77	MUSB_DEV_MODE(musb);
	78	} else {
	79	musb->xceiv->state = OTG_STATE_A_IDLE;
	80	MUSB_HST_MODE(musb);
	81	}
	82	break;
	83	case OTG_STATE_A_SUSPEND:
	84	/* finish RESUME signaling? */
	85	if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
	86	power = musb_readb(musb->mregs, MUSB_POWER);
	87	power &= ~MUSB_POWER_RESUME;
	88	dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
	89	musb_writeb(musb->mregs, MUSB_POWER, power);
	90	musb->is_active = 1;
91	musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
92	\| MUSB_PORT_STAT_RESUME);
93	musb->port1_status \|= USB_PORT_STAT_C_SUSPEND << 16;
94	usb_hcd_poll_rh_status(musb_to_hcd(musb));
95	/* NOTE: it might really be A_WAIT_BCON ... */
96	musb->xceiv->state = OTG_STATE_A_HOST;
97	}
98	break;
99	case OTG_STATE_A_HOST:
100	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
101	if (devctl & MUSB_DEVCTL_BDEVICE)
102	musb->xceiv->state = OTG_STATE_B_IDLE;
103	else
104	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
105	default:
106	break;
107	}
108	spin_unlock_irqrestore(&musb->lock, flags);
109	}
110
111
112	static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
113	{
114	unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
115	static unsigned long last_timer;
116
117	if (timeout == 0)
118	timeout = default_timeout;
119
120	/* Never idle if active, or when VBUS timeout is not set as host */
121	if (musb->is_active \|\| ((musb->a_wait_bcon == 0)
122	&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
123	dev_dbg(musb->controller, "%s active, deleting timer\n",
124	otg_state_string(musb->xceiv->state));
125	del_timer(&musb_idle_timer);
126	last_timer = jiffies;
127	return;
128	}
129
130	if (time_after(last_timer, timeout)) {
131	if (!timer_pending(&musb_idle_timer))
132	last_timer = timeout;
133	else {
134	dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
135	return;
136	}
137	}
138	last_timer = timeout;
139
140	dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
141	otg_state_string(musb->xceiv->state),
142	(unsigned long)jiffies_to_msecs(timeout - jiffies));
143	mod_timer(&musb_idle_timer, timeout);
144	}
145
146	static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
147	{
148	struct usb_otg *otg = musb->xceiv->otg;
149	u8 devctl;
150	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
151	int ret = 1;
152	/* HDRC controls CPEN, but beware current surges during device
153	* connect. They can trigger transient overcurrent conditions
154	* that must be ignored.
155	*/
156
157	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
158
159	if (is_on) {
160	if (musb->xceiv->state == OTG_STATE_A_IDLE) {
161	/* start the session */
162	devctl \|= MUSB_DEVCTL_SESSION;
163	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
164	/*
165	* Wait for the musb to set as A device to enable the
166	* VBUS
167	*/
168	while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
169
170	cpu_relax();
171
172	if (time_after(jiffies, timeout)) {
173	dev_err(musb->controller,
174	"configured as A device timeout");
175	ret = -EINVAL;
176	break;
177	}
178	}
179
180	if (ret && otg->set_vbus)
181	otg_set_vbus(otg, 1);
182	} else {
183	musb->is_active = 1;
184	otg->default_a = 1;
185	musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
186	devctl \|= MUSB_DEVCTL_SESSION;
187	MUSB_HST_MODE(musb);
188	}
189	} else {
190	musb->is_active = 0;
191
192	/* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
193	* jumping right to B_IDLE...
194	*/
195
196	otg->default_a = 0;
197	musb->xceiv->state = OTG_STATE_B_IDLE;
198	devctl &= ~MUSB_DEVCTL_SESSION;
199
200	MUSB_DEV_MODE(musb);
201	}
202	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
203
204	dev_dbg(musb->controller, "VBUS %s, devctl %02x "
205	/* otg %3x conf %08x prcm %08x */ "\n",
206	otg_state_string(musb->xceiv->state),
207	musb_readb(musb->mregs, MUSB_DEVCTL));
208	}
209
210	static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
211	{
212	u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
213
214	devctl \|= MUSB_DEVCTL_SESSION;
215	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
216
217	return 0;
218	}
219	#endif
220
221	static inline void omap2430_low_level_exit(struct musb *musb)
222	{
223	u32 l;
224
225	/* in any role */
226	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
227	l \|= ENABLEFORCE; /* enable MSTANDBY */
228	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
229	}
230
231	static inline void omap2430_low_level_init(struct musb *musb)
232	{
233	u32 l;
234
235	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
236	l &= ~ENABLEFORCE; /* disable MSTANDBY */
237	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
238	}
239
240	#ifndef __UBOOT__
241	void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
242	{
243	struct omap2430_glue *glue = _glue;
244	struct musb *musb = glue_to_musb(glue);
245
246	glue->status = status;
247	if (!musb) {
248	dev_err(glue->dev, "musb core is not yet ready\n");
249	return;
250	}
251
252	schedule_work(&glue->omap_musb_mailbox_work);
253	}
254	EXPORT_SYMBOL_GPL(omap_musb_mailbox);
255
256	static void omap_musb_set_mailbox(struct omap2430_glue *glue)
257	{
258	struct musb *musb = glue_to_musb(glue);
259	struct device *dev = musb->controller;
260	struct musb_hdrc_platform_data *pdata = dev->platform_data;
261	struct omap_musb_board_data *data = pdata->board_data;
262	struct usb_otg *otg = musb->xceiv->otg;
263
264	switch (glue->status) {
265	case OMAP_MUSB_ID_GROUND:
266	dev_dbg(dev, "ID GND\n");
267
268	otg->default_a = true;
269	musb->xceiv->state = OTG_STATE_A_IDLE;
270	musb->xceiv->last_event = USB_EVENT_ID;
271	if (!is_otg_enabled(musb) \|\| musb->gadget_driver) {
272	pm_runtime_get_sync(dev);
273	usb_phy_init(musb->xceiv);
274	omap2430_musb_set_vbus(musb, 1);
275	}
276	break;
277
278	case OMAP_MUSB_VBUS_VALID:
279	dev_dbg(dev, "VBUS Connect\n");
280
281	otg->default_a = false;
282	musb->xceiv->state = OTG_STATE_B_IDLE;
283	musb->xceiv->last_event = USB_EVENT_VBUS;
284	if (musb->gadget_driver)
285	pm_runtime_get_sync(dev);
286	usb_phy_init(musb->xceiv);
287	break;
288
289	case OMAP_MUSB_ID_FLOAT:
290	case OMAP_MUSB_VBUS_OFF:
291	dev_dbg(dev, "VBUS Disconnect\n");
292
293	musb->xceiv->last_event = USB_EVENT_NONE;
294	if (is_otg_enabled(musb) \|\| is_peripheral_enabled(musb))
295	if (musb->gadget_driver) {
296	pm_runtime_mark_last_busy(dev);
297	pm_runtime_put_autosuspend(dev);
298	}
299
300	if (data->interface_type == MUSB_INTERFACE_UTMI) {
301	if (musb->xceiv->otg->set_vbus)
302	otg_set_vbus(musb->xceiv->otg, 0);
303	}
304	usb_phy_shutdown(musb->xceiv);
305	break;
306	default:
307	dev_dbg(dev, "ID float\n");
308	}
309	}
310
311
312	static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
313	{
314	struct omap2430_glue *glue = container_of(mailbox_work,
315	struct omap2430_glue, omap_musb_mailbox_work);
316	omap_musb_set_mailbox(glue);
317	}
318	#endif
319
320	static int omap2430_musb_init(struct musb *musb)
321	{
322	u32 l;
323	int status = 0;
193d7d15	324	unsigned long int start;
673a524b IY	325	#ifndef __UBOOT__
	326	struct device *dev = musb->controller;
	327	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	328	struct musb_hdrc_platform_data *plat = dev->platform_data;
	329	struct omap_musb_board_data *data = plat->board_data;
	330	#else
	331	struct omap_musb_board_data *data =
	332	(struct omap_musb_board_data *)musb->controller;
	333	#endif
	334
193d7d15 PK	335	/* Reset the controller */
	336	musb_writel(musb->mregs, OTG_SYSCONFIG, SOFTRST);
	337
	338	start = get_timer(0);
	339
	340	while (1) {
	341	l = musb_readl(musb->mregs, OTG_SYSCONFIG);
	342	if ((l & SOFTRST) == 0)
	343	break;
	344
	345	if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
	346	dev_err(musb->controller, "MUSB reset is taking too long\n");
	347	return -ENODEV;
	348	}
	349	}
673a524b IY	350
	351	#ifndef __UBOOT__
	352	/* We require some kind of external transceiver, hooked
	353	* up through ULPI. TWL4030-family PMICs include one,
	354	* which needs a driver, drivers aren't always needed.
	355	*/
	356	musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	357	if (IS_ERR_OR_NULL(musb->xceiv)) {
	358	pr_err("HS USB OTG: no transceiver configured\n");
	359	return -ENODEV;
	360	}
	361
	362	status = pm_runtime_get_sync(dev);
	363	if (status < 0) {
	364	dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
	365	goto err1;
	366	}
	367	#endif
	368
	369	l = musb_readl(musb->mregs, OTG_INTERFSEL);
	370
	371	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	372	/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
	373	l &= ~ULPI_12PIN; /* Disable ULPI */
	374	l \|= UTMI_8BIT; /* Enable UTMI */
	375	} else {
	376	l \|= ULPI_12PIN;
	377	}
	378
	379	musb_writel(musb->mregs, OTG_INTERFSEL, l);
	380
	381	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
	382	"sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
	383	musb_readl(musb->mregs, OTG_REVISION),
	384	musb_readl(musb->mregs, OTG_SYSCONFIG),
	385	musb_readl(musb->mregs, OTG_SYSSTATUS),
	386	musb_readl(musb->mregs, OTG_INTERFSEL),
	387	musb_readl(musb->mregs, OTG_SIMENABLE));
	388
	389	#ifndef __UBOOT__
	390	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
	391
	392	if (glue->status != OMAP_MUSB_UNKNOWN)
	393	omap_musb_set_mailbox(glue);
	394
	395	pm_runtime_put_noidle(musb->controller);
	396	#endif
	397	return 0;
	398
	399	err1:
	400	return status;
	401	}
	402
15837236	403	#ifndef __UBOOT__
673a524b	404	static void omap2430_musb_enable(struct musb *musb)
15837236 HG	405	#else
	406	static int omap2430_musb_enable(struct musb *musb)
	407	#endif
673a524b IY	408	{
	409	#ifndef __UBOOT__
	410	u8 devctl;
	411	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	412	struct device *dev = musb->controller;
	413	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	414	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	415	struct omap_musb_board_data *data = pdata->board_data;
	416
	417	switch (glue->status) {
	418
	419	case OMAP_MUSB_ID_GROUND:
	420	usb_phy_init(musb->xceiv);
	421	if (data->interface_type != MUSB_INTERFACE_UTMI)
	422	break;
	423	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	424	/* start the session */
	425	devctl \|= MUSB_DEVCTL_SESSION;
	426	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	427	while (musb_readb(musb->mregs, MUSB_DEVCTL) &
	428	MUSB_DEVCTL_BDEVICE) {
	429	cpu_relax();
	430
	431	if (time_after(jiffies, timeout)) {
	432	dev_err(dev, "configured as A device timeout");
	433	break;
	434	}
	435	}
	436	break;
	437
	438	case OMAP_MUSB_VBUS_VALID:
	439	usb_phy_init(musb->xceiv);
	440	break;
	441
	442	default:
	443	break;
	444	}
	445	#else
	446	#ifdef CONFIG_TWL4030_USB
	447	if (twl4030_usb_ulpi_init()) {
	448	serial_printf("ERROR: %s Could not initialize PHY\n",
	449	__PRETTY_FUNCTION__);
	450	}
	451	#endif
15837236	452	return 0;
673a524b IY	453	#endif
	454	}
	455
	456	static void omap2430_musb_disable(struct musb *musb)
	457	{
	458	#ifndef __UBOOT__
	459	struct device *dev = musb->controller;
	460	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	461
	462	if (glue->status != OMAP_MUSB_UNKNOWN)
	463	usb_phy_shutdown(musb->xceiv);
	464	#endif
	465	}
	466
	467	static int omap2430_musb_exit(struct musb *musb)
	468	{
	469	del_timer_sync(&musb_idle_timer);
	470
	471	omap2430_low_level_exit(musb);
	472
	473	return 0;
	474	}
	475
	476	#ifndef __UBOOT__
	477	static const struct musb_platform_ops omap2430_ops = {
	478	#else
	479	const struct musb_platform_ops omap2430_ops = {
	480	#endif
	481	.init = omap2430_musb_init,
	482	.exit = omap2430_musb_exit,
	483
	484	#ifndef __UBOOT__
	485	.set_mode = omap2430_musb_set_mode,
	486	.try_idle = omap2430_musb_try_idle,
	487
	488	.set_vbus = omap2430_musb_set_vbus,
	489	#endif
	490
	491	.enable = omap2430_musb_enable,
	492	.disable = omap2430_musb_disable,
	493	};
	494
	495	#ifndef __UBOOT__
	496	static u64 omap2430_dmamask = DMA_BIT_MASK(32);
	497
	498	static int __devinit omap2430_probe(struct platform_device *pdev)
	499	{
	500	struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
	501	struct platform_device *musb;
	502	struct omap2430_glue *glue;
	503	int ret = -ENOMEM;
	504
	505	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
	506	if (!glue) {
	507	dev_err(&pdev->dev, "failed to allocate glue context\n");
	508	goto err0;
	509	}
	510
	511	musb = platform_device_alloc("musb-hdrc", -1);
	512	if (!musb) {
	513	dev_err(&pdev->dev, "failed to allocate musb device\n");
	514	goto err0;
	515	}
	516
517	musb->dev.parent = &pdev->dev;
518	musb->dev.dma_mask = &omap2430_dmamask;
519	musb->dev.coherent_dma_mask = omap2430_dmamask;
520
521	glue->dev = &pdev->dev;
522	glue->musb = musb;
523	glue->status = OMAP_MUSB_UNKNOWN;
524
525	pdata->platform_ops = &omap2430_ops;
526
527	platform_set_drvdata(pdev, glue);
528
529	/*
530	* REVISIT if we ever have two instances of the wrapper, we will be
531	* in big trouble
532	*/
533	_glue = glue;
534
535	INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
536
537	ret = platform_device_add_resources(musb, pdev->resource,
538	pdev->num_resources);
539	if (ret) {
540	dev_err(&pdev->dev, "failed to add resources\n");
541	goto err1;
542	}
543
544	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
545	if (ret) {
546	dev_err(&pdev->dev, "failed to add platform_data\n");
547	goto err1;
548	}
549
550	pm_runtime_enable(&pdev->dev);
551
552	ret = platform_device_add(musb);
553	if (ret) {
554	dev_err(&pdev->dev, "failed to register musb device\n");
555	goto err1;
556	}
557
558	return 0;
559
560	err1:
561	platform_device_put(musb);
562
563	err0:
564	return ret;
565	}
566
567	static int __devexit omap2430_remove(struct platform_device *pdev)
568	{
569	struct omap2430_glue *glue = platform_get_drvdata(pdev);
570
571	cancel_work_sync(&glue->omap_musb_mailbox_work);
572	platform_device_del(glue->musb);
573	platform_device_put(glue->musb);
574
575	return 0;
576	}
577
578	#ifdef CONFIG_PM
579
580	static int omap2430_runtime_suspend(struct device *dev)
581	{
582	struct omap2430_glue *glue = dev_get_drvdata(dev);
583	struct musb *musb = glue_to_musb(glue);
584
585	if (musb) {
586	musb->context.otg_interfsel = musb_readl(musb->mregs,
587	OTG_INTERFSEL);
588
589	omap2430_low_level_exit(musb);
590	usb_phy_set_suspend(musb->xceiv, 1);
591	}
592
593	return 0;
594	}
595
596	static int omap2430_runtime_resume(struct device *dev)
597	{
598	struct omap2430_glue *glue = dev_get_drvdata(dev);
599	struct musb *musb = glue_to_musb(glue);
600
601	if (musb) {
602	omap2430_low_level_init(musb);
603	musb_writel(musb->mregs, OTG_INTERFSEL,
604	musb->context.otg_interfsel);
605
606	usb_phy_set_suspend(musb->xceiv, 0);
607	}
608
609	return 0;
610	}
611
612	static struct dev_pm_ops omap2430_pm_ops = {
613	.runtime_suspend = omap2430_runtime_suspend,
614	.runtime_resume = omap2430_runtime_resume,
615	};
616
617	#define DEV_PM_OPS (&omap2430_pm_ops)
618	#else
619	#define DEV_PM_OPS NULL
620	#endif
621
622	static struct platform_driver omap2430_driver = {
623	.probe = omap2430_probe,
624	.remove = __devexit_p(omap2430_remove),
625	.driver = {
626	.name = "musb-omap2430",
627	.pm = DEV_PM_OPS,
628	},
629	};
630
631	MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
632	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
633	MODULE_LICENSE("GPL v2");
634
635	static int __init omap2430_init(void)
636	{
637	return platform_driver_register(&omap2430_driver);
638	}
639	subsys_initcall(omap2430_init);
640
641	static void __exit omap2430_exit(void)
642	{
643	platform_driver_unregister(&omap2430_driver);
644	}
645	module_exit(omap2430_exit);
646	#endif