[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.
 *
 * SPDX-License-Identifier:	GPL-2.0
 */
#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_common.h>
#include <asm/omap_musb.h>
#include <twl4030.h>
#include <twl6030.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

#ifdef CONFIG_TWL6030_POWER
	twl6030_usb_device_settings();
#endif

#ifdef CONFIG_OMAP44XX
	u32 *usbotghs_control = (u32 *)((*ctrl)->control_usbotghs_ctrl);
	*usbotghs_control = USBOTGHS_CONTROL_AVALID |
		USBOTGHS_CONTROL_VBUSVALID | USBOTGHS_CONTROL_IDDIG;
#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	*
5b8031cc	10	* SPDX-License-Identifier: GPL-2.0
673a524b	11	*/
673a524b IY	12	#ifndef __UBOOT__
	13	#include <linux/module.h>
	14	#include <linux/kernel.h>
	15	#include <linux/sched.h>
	16	#include <linux/init.h>
	17	#include <linux/list.h>
	18	#include <linux/io.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/dma-mapping.h>
	21	#include <linux/pm_runtime.h>
	22	#include <linux/err.h>
	23	#include <linux/usb/musb-omap.h>
	24	#else
	25	#include <common.h>
27754d18	26	#include <asm/omap_common.h>
673a524b IY	27	#include <asm/omap_musb.h>
673a524b IY	28	#include <twl4030.h>
27754d18	29	#include <twl6030.h>
673a524b IY	30	#include "linux-compat.h"
	31	#endif
	32
	33	#include "musb_core.h"
	34	#include "omap2430.h"
	35
	36	#ifndef __UBOOT__
	37	struct omap2430_glue {
	38	struct device *dev;
	39	struct platform_device *musb;
	40	enum omap_musb_vbus_id_status status;
	41	struct work_struct omap_musb_mailbox_work;
	42	};
	43	#define glue_to_musb(g) platform_get_drvdata(g->musb)
	44
	45	struct omap2430_glue *_glue;
	46
	47	static struct timer_list musb_idle_timer;
	48
	49	static void musb_do_idle(unsigned long _musb)
	50	{
	51	struct musb musb = (void )_musb;
	52	unsigned long flags;
	53	u8 power;
	54	u8 devctl;
	55
	56	spin_lock_irqsave(&musb->lock, flags);
	57
	58	switch (musb->xceiv->state) {
	59	case OTG_STATE_A_WAIT_BCON:
	60
	61	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	62	if (devctl & MUSB_DEVCTL_BDEVICE) {
	63	musb->xceiv->state = OTG_STATE_B_IDLE;
	64	MUSB_DEV_MODE(musb);
	65	} else {
	66	musb->xceiv->state = OTG_STATE_A_IDLE;
	67	MUSB_HST_MODE(musb);
	68	}
	69	break;
	70	case OTG_STATE_A_SUSPEND:
	71	/* finish RESUME signaling? */
	72	if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
	73	power = musb_readb(musb->mregs, MUSB_POWER);
	74	power &= ~MUSB_POWER_RESUME;
	75	dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
	76	musb_writeb(musb->mregs, MUSB_POWER, power);
	77	musb->is_active = 1;
	78	musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
	79	\| MUSB_PORT_STAT_RESUME);
	80	musb->port1_status \|= USB_PORT_STAT_C_SUSPEND << 16;
	81	usb_hcd_poll_rh_status(musb_to_hcd(musb));
	82	/* NOTE: it might really be A_WAIT_BCON ... */
	83	musb->xceiv->state = OTG_STATE_A_HOST;
	84	}
	85	break;
	86	case OTG_STATE_A_HOST:
	87	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	88	if (devctl & MUSB_DEVCTL_BDEVICE)
	89	musb->xceiv->state = OTG_STATE_B_IDLE;
	90	else
	91	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
	92	default:
	93	break;
94	}
95	spin_unlock_irqrestore(&musb->lock, flags);
96	}
97
98
99	static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
100	{
101	unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
102	static unsigned long last_timer;
103
104	if (timeout == 0)
105	timeout = default_timeout;
106
107	/* Never idle if active, or when VBUS timeout is not set as host */
108	if (musb->is_active \|\| ((musb->a_wait_bcon == 0)
109	&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
110	dev_dbg(musb->controller, "%s active, deleting timer\n",
111	otg_state_string(musb->xceiv->state));
112	del_timer(&musb_idle_timer);
113	last_timer = jiffies;
114	return;
115	}
116
117	if (time_after(last_timer, timeout)) {
118	if (!timer_pending(&musb_idle_timer))
119	last_timer = timeout;
120	else {
121	dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
122	return;
123	}
124	}
125	last_timer = timeout;
126
127	dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
128	otg_state_string(musb->xceiv->state),
129	(unsigned long)jiffies_to_msecs(timeout - jiffies));
130	mod_timer(&musb_idle_timer, timeout);
131	}
132
133	static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
134	{
135	struct usb_otg *otg = musb->xceiv->otg;
136	u8 devctl;
137	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
138	int ret = 1;
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) {
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 && otg->set_vbus)
168	otg_set_vbus(otg, 1);
169	} else {
170	musb->is_active = 1;
171	otg->default_a = 1;
172	musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
173	devctl \|= MUSB_DEVCTL_SESSION;
174	MUSB_HST_MODE(musb);
175	}
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
183	otg->default_a = 0;
184	musb->xceiv->state = OTG_STATE_B_IDLE;
185	devctl &= ~MUSB_DEVCTL_SESSION;
186
187	MUSB_DEV_MODE(musb);
188	}
189	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
190
191	dev_dbg(musb->controller, "VBUS %s, devctl %02x "
192	/* otg %3x conf %08x prcm %08x */ "\n",
193	otg_state_string(musb->xceiv->state),
194	musb_readb(musb->mregs, MUSB_DEVCTL));
195	}
196
197	static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
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
204	return 0;
205	}
206	#endif
207
208	static inline void omap2430_low_level_exit(struct musb *musb)
209	{
210	u32 l;
211
212	/* in any role */
213	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
214	l \|= ENABLEFORCE; /* enable MSTANDBY */
215	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
216	}
217
218	static inline void omap2430_low_level_init(struct musb *musb)
219	{
220	u32 l;
221
222	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
223	l &= ~ENABLEFORCE; /* disable MSTANDBY */
224	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
225	}
226
227	#ifndef __UBOOT__
228	void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
229	{
230	struct omap2430_glue *glue = _glue;
231	struct musb *musb = glue_to_musb(glue);
232
233	glue->status = status;
234	if (!musb) {
235	dev_err(glue->dev, "musb core is not yet ready\n");
236	return;
237	}
238
239	schedule_work(&glue->omap_musb_mailbox_work);
240	}
241	EXPORT_SYMBOL_GPL(omap_musb_mailbox);
242
243	static void omap_musb_set_mailbox(struct omap2430_glue *glue)
244	{
245	struct musb *musb = glue_to_musb(glue);
246	struct device *dev = musb->controller;
247	struct musb_hdrc_platform_data *pdata = dev->platform_data;
248	struct omap_musb_board_data *data = pdata->board_data;
249	struct usb_otg *otg = musb->xceiv->otg;
250
251	switch (glue->status) {
252	case OMAP_MUSB_ID_GROUND:
253	dev_dbg(dev, "ID GND\n");
254
255	otg->default_a = true;
256	musb->xceiv->state = OTG_STATE_A_IDLE;
257	musb->xceiv->last_event = USB_EVENT_ID;
258	if (!is_otg_enabled(musb) \|\| musb->gadget_driver) {
259	pm_runtime_get_sync(dev);
260	usb_phy_init(musb->xceiv);
261	omap2430_musb_set_vbus(musb, 1);
262	}
263	break;
264
265	case OMAP_MUSB_VBUS_VALID:
266	dev_dbg(dev, "VBUS Connect\n");
267
268	otg->default_a = false;
269	musb->xceiv->state = OTG_STATE_B_IDLE;
270	musb->xceiv->last_event = USB_EVENT_VBUS;
271	if (musb->gadget_driver)
272	pm_runtime_get_sync(dev);
273	usb_phy_init(musb->xceiv);
274	break;
275
276	case OMAP_MUSB_ID_FLOAT:
277	case OMAP_MUSB_VBUS_OFF:
278	dev_dbg(dev, "VBUS Disconnect\n");
279
280	musb->xceiv->last_event = USB_EVENT_NONE;
281	if (is_otg_enabled(musb) \|\| is_peripheral_enabled(musb))
282	if (musb->gadget_driver) {
283	pm_runtime_mark_last_busy(dev);
284	pm_runtime_put_autosuspend(dev);
285	}
286
287	if (data->interface_type == MUSB_INTERFACE_UTMI) {
288	if (musb->xceiv->otg->set_vbus)
289	otg_set_vbus(musb->xceiv->otg, 0);
290	}
291	usb_phy_shutdown(musb->xceiv);
292	break;
293	default:
294	dev_dbg(dev, "ID float\n");
295	}
296	}
297
298
299	static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
300	{
301	struct omap2430_glue *glue = container_of(mailbox_work,
302	struct omap2430_glue, omap_musb_mailbox_work);
303	omap_musb_set_mailbox(glue);
304	}
305	#endif
306
307	static int omap2430_musb_init(struct musb *musb)
308	{
309	u32 l;
310	int status = 0;
193d7d15	311	unsigned long int start;
673a524b IY	312	#ifndef __UBOOT__
	313	struct device *dev = musb->controller;
	314	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	315	struct musb_hdrc_platform_data *plat = dev->platform_data;
	316	struct omap_musb_board_data *data = plat->board_data;
	317	#else
	318	struct omap_musb_board_data *data =
	319	(struct omap_musb_board_data *)musb->controller;
	320	#endif
	321
193d7d15 PK	322	/* Reset the controller */
	323	musb_writel(musb->mregs, OTG_SYSCONFIG, SOFTRST);
	324
	325	start = get_timer(0);
	326
	327	while (1) {
	328	l = musb_readl(musb->mregs, OTG_SYSCONFIG);
	329	if ((l & SOFTRST) == 0)
	330	break;
	331
	332	if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
	333	dev_err(musb->controller, "MUSB reset is taking too long\n");
	334	return -ENODEV;
	335	}
	336	}
673a524b IY	337
	338	#ifndef __UBOOT__
	339	/* We require some kind of external transceiver, hooked
	340	* up through ULPI. TWL4030-family PMICs include one,
	341	* which needs a driver, drivers aren't always needed.
	342	*/
	343	musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	344	if (IS_ERR_OR_NULL(musb->xceiv)) {
	345	pr_err("HS USB OTG: no transceiver configured\n");
	346	return -ENODEV;
	347	}
	348
	349	status = pm_runtime_get_sync(dev);
	350	if (status < 0) {
	351	dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
	352	goto err1;
	353	}
	354	#endif
	355
	356	l = musb_readl(musb->mregs, OTG_INTERFSEL);
	357
	358	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	359	/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
	360	l &= ~ULPI_12PIN; /* Disable ULPI */
	361	l \|= UTMI_8BIT; /* Enable UTMI */
	362	} else {
	363	l \|= ULPI_12PIN;
	364	}
	365
	366	musb_writel(musb->mregs, OTG_INTERFSEL, l);
	367
	368	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
	369	"sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
	370	musb_readl(musb->mregs, OTG_REVISION),
	371	musb_readl(musb->mregs, OTG_SYSCONFIG),
	372	musb_readl(musb->mregs, OTG_SYSSTATUS),
	373	musb_readl(musb->mregs, OTG_INTERFSEL),
	374	musb_readl(musb->mregs, OTG_SIMENABLE));
	375
	376	#ifndef __UBOOT__
	377	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
	378
	379	if (glue->status != OMAP_MUSB_UNKNOWN)
	380	omap_musb_set_mailbox(glue);
	381
	382	pm_runtime_put_noidle(musb->controller);
	383	#endif
	384	return 0;
	385
	386	err1:
	387	return status;
	388	}
	389
15837236	390	#ifndef __UBOOT__
673a524b	391	static void omap2430_musb_enable(struct musb *musb)
15837236 HG	392	#else
	393	static int omap2430_musb_enable(struct musb *musb)
	394	#endif
673a524b IY	395	{
	396	#ifndef __UBOOT__
	397	u8 devctl;
	398	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	399	struct device *dev = musb->controller;
	400	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	401	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	402	struct omap_musb_board_data *data = pdata->board_data;
	403
	404	switch (glue->status) {
	405
	406	case OMAP_MUSB_ID_GROUND:
	407	usb_phy_init(musb->xceiv);
	408	if (data->interface_type != MUSB_INTERFACE_UTMI)
	409	break;
	410	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	411	/* start the session */
	412	devctl \|= MUSB_DEVCTL_SESSION;
	413	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	414	while (musb_readb(musb->mregs, MUSB_DEVCTL) &
	415	MUSB_DEVCTL_BDEVICE) {
	416	cpu_relax();
	417
	418	if (time_after(jiffies, timeout)) {
	419	dev_err(dev, "configured as A device timeout");
	420	break;
	421	}
	422	}
	423	break;
	424
	425	case OMAP_MUSB_VBUS_VALID:
	426	usb_phy_init(musb->xceiv);
	427	break;
	428
	429	default:
	430	break;
	431	}
	432	#else
	433	#ifdef CONFIG_TWL4030_USB
	434	if (twl4030_usb_ulpi_init()) {
	435	serial_printf("ERROR: %s Could not initialize PHY\n",
	436	__PRETTY_FUNCTION__);
	437	}
	438	#endif
27754d18 PK	439
	440	#ifdef CONFIG_TWL6030_POWER
	441	twl6030_usb_device_settings();
	442	#endif
	443
77777f76	444	#ifdef CONFIG_OMAP44XX
27754d18 PK	445	u32 usbotghs_control = (u32 )((*ctrl)->control_usbotghs_ctrl);
	446	*usbotghs_control = USBOTGHS_CONTROL_AVALID \|
	447	USBOTGHS_CONTROL_VBUSVALID \| USBOTGHS_CONTROL_IDDIG;
	448	#endif
	449
15837236	450	return 0;
673a524b IY	451	#endif
	452	}
	453
	454	static void omap2430_musb_disable(struct musb *musb)
	455	{
	456	#ifndef __UBOOT__
	457	struct device *dev = musb->controller;
	458	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	459
	460	if (glue->status != OMAP_MUSB_UNKNOWN)
	461	usb_phy_shutdown(musb->xceiv);
	462	#endif
	463	}
	464
	465	static int omap2430_musb_exit(struct musb *musb)
	466	{
	467	del_timer_sync(&musb_idle_timer);
	468
	469	omap2430_low_level_exit(musb);
	470
	471	return 0;
	472	}
	473
	474	#ifndef __UBOOT__
	475	static const struct musb_platform_ops omap2430_ops = {
	476	#else
	477	const struct musb_platform_ops omap2430_ops = {
	478	#endif
	479	.init = omap2430_musb_init,
	480	.exit = omap2430_musb_exit,
	481
	482	#ifndef __UBOOT__
	483	.set_mode = omap2430_musb_set_mode,
	484	.try_idle = omap2430_musb_try_idle,
	485
	486	.set_vbus = omap2430_musb_set_vbus,
	487	#endif
	488
	489	.enable = omap2430_musb_enable,
	490	.disable = omap2430_musb_disable,
	491	};
	492
	493	#ifndef __UBOOT__
	494	static u64 omap2430_dmamask = DMA_BIT_MASK(32);
	495
	496	static int __devinit omap2430_probe(struct platform_device *pdev)
	497	{
	498	struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
	499	struct platform_device *musb;
	500	struct omap2430_glue *glue;
	501	int ret = -ENOMEM;
	502
	503	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
	504	if (!glue) {
	505	dev_err(&pdev->dev, "failed to allocate glue context\n");
	506	goto err0;
	507	}
	508
	509	musb = platform_device_alloc("musb-hdrc", -1);
	510	if (!musb) {
	511	dev_err(&pdev->dev, "failed to allocate musb device\n");
	512	goto err0;
	513	}
	514
515	musb->dev.parent = &pdev->dev;
516	musb->dev.dma_mask = &omap2430_dmamask;
517	musb->dev.coherent_dma_mask = omap2430_dmamask;
518
519	glue->dev = &pdev->dev;
520	glue->musb = musb;
521	glue->status = OMAP_MUSB_UNKNOWN;
522
523	pdata->platform_ops = &omap2430_ops;
524
525	platform_set_drvdata(pdev, glue);
526
527	/*
528	* REVISIT if we ever have two instances of the wrapper, we will be
529	* in big trouble
530	*/
531	_glue = glue;
532
533	INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
534
535	ret = platform_device_add_resources(musb, pdev->resource,
536	pdev->num_resources);
537	if (ret) {
538	dev_err(&pdev->dev, "failed to add resources\n");
539	goto err1;
540	}
541
542	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
543	if (ret) {
544	dev_err(&pdev->dev, "failed to add platform_data\n");
545	goto err1;
546	}
547
548	pm_runtime_enable(&pdev->dev);
549
550	ret = platform_device_add(musb);
551	if (ret) {
552	dev_err(&pdev->dev, "failed to register musb device\n");
553	goto err1;
554	}
555
556	return 0;
557
558	err1:
559	platform_device_put(musb);
560
561	err0:
562	return ret;
563	}
564
565	static int __devexit omap2430_remove(struct platform_device *pdev)
566	{
567	struct omap2430_glue *glue = platform_get_drvdata(pdev);
568
569	cancel_work_sync(&glue->omap_musb_mailbox_work);
570	platform_device_del(glue->musb);
571	platform_device_put(glue->musb);
572
573	return 0;
574	}
575
576	#ifdef CONFIG_PM
577
578	static int omap2430_runtime_suspend(struct device *dev)
579	{
580	struct omap2430_glue *glue = dev_get_drvdata(dev);
581	struct musb *musb = glue_to_musb(glue);
582
583	if (musb) {
584	musb->context.otg_interfsel = musb_readl(musb->mregs,
585	OTG_INTERFSEL);
586
587	omap2430_low_level_exit(musb);
588	usb_phy_set_suspend(musb->xceiv, 1);
589	}
590
591	return 0;
592	}
593
594	static int omap2430_runtime_resume(struct device *dev)
595	{
596	struct omap2430_glue *glue = dev_get_drvdata(dev);
597	struct musb *musb = glue_to_musb(glue);
598
599	if (musb) {
600	omap2430_low_level_init(musb);
601	musb_writel(musb->mregs, OTG_INTERFSEL,
602	musb->context.otg_interfsel);
603
604	usb_phy_set_suspend(musb->xceiv, 0);
605	}
606
607	return 0;
608	}
609
610	static struct dev_pm_ops omap2430_pm_ops = {
611	.runtime_suspend = omap2430_runtime_suspend,
612	.runtime_resume = omap2430_runtime_resume,
613	};
614
615	#define DEV_PM_OPS (&omap2430_pm_ops)
616	#else
617	#define DEV_PM_OPS NULL
618	#endif
619
620	static struct platform_driver omap2430_driver = {
621	.probe = omap2430_probe,
622	.remove = __devexit_p(omap2430_remove),
623	.driver = {
624	.name = "musb-omap2430",
625	.pm = DEV_PM_OPS,
626	},
627	};
628
629	MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
630	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
631	MODULE_LICENSE("GPL v2");
632
633	static int __init omap2430_init(void)
634	{
635	return platform_driver_register(&omap2430_driver);
636	}
637	subsys_initcall(omap2430_init);
638
639	static void __exit omap2430_exit(void)
640	{
641	platform_driver_unregister(&omap2430_driver);
642	}
643	module_exit(omap2430_exit);
644	#endif