[linux-2.6-block.git] / drivers / usb / musb / omap2430.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 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.
 */
#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/of.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/usb/musb.h>
#include <linux/phy/omap_control_phy.h>
#include <linux/of_platform.h>

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

struct omap2430_glue {
	struct device		*dev;
	struct platform_device	*musb;
	enum musb_vbus_id_status status;
	struct work_struct	omap_musb_mailbox_work;
	struct device		*control_otghs;
	unsigned int		is_runtime_suspended:1;
	unsigned int		needs_resume:1;
	unsigned int		phy_suspended:1;
};
#define glue_to_musb(g)		platform_get_drvdata(g->musb)

static struct omap2430_glue	*_glue;

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);
}

static int omap2430_musb_mailbox(enum musb_vbus_id_status status)
{
	struct omap2430_glue	*glue = _glue;

	if (!glue) {
		pr_err("%s: musb core is not yet initialized\n", __func__);
		return -EPROBE_DEFER;
	}
	glue->status = status;

	if (!glue_to_musb(glue)) {
		pr_err("%s: musb core is not yet ready\n", __func__);
		return -EPROBE_DEFER;
	}

	schedule_work(&glue->omap_musb_mailbox_work);

	return 0;
}

/*
 * HDRC controls CPEN, but beware current surges during device connect.
 * They can trigger transient overcurrent conditions that must be ignored.
 *
 * Note that we're skipping A_WAIT_VFALL -> A_IDLE and jumping right to B_IDLE
 * as set by musb_set_peripheral().
 */
static void omap_musb_set_mailbox(struct omap2430_glue *glue)
{
	struct musb *musb = glue_to_musb(glue);
	int error;

	pm_runtime_get_sync(musb->controller);

	dev_dbg(musb->controller, "VBUS %s, devctl %02x\n",
		usb_otg_state_string(musb->xceiv->otg->state),
		musb_readb(musb->mregs, MUSB_DEVCTL));

	switch (glue->status) {
	case MUSB_ID_GROUND:
		dev_dbg(musb->controller, "ID GND\n");
		switch (musb->xceiv->otg->state) {
		case OTG_STATE_A_IDLE:
			error = musb_set_host(musb);
			if (error)
				break;
			musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
			fallthrough;
		case OTG_STATE_A_WAIT_VRISE:
		case OTG_STATE_A_WAIT_BCON:
		case OTG_STATE_A_HOST:
			/*
			 * On multiple ID ground interrupts just keep enabling
			 * VBUS. At least cpcap VBUS shuts down otherwise.
			 */
			otg_set_vbus(musb->xceiv->otg, 1);
			break;
		default:
			musb->xceiv->otg->state = OTG_STATE_A_IDLE;
			musb->xceiv->last_event = USB_EVENT_ID;
			if (musb->gadget_driver) {
				omap_control_usb_set_mode(glue->control_otghs,
							  USB_MODE_HOST);
				otg_set_vbus(musb->xceiv->otg, 1);
			}
			break;
		}
		break;

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

		musb->xceiv->otg->state = OTG_STATE_B_IDLE;
		musb->xceiv->last_event = USB_EVENT_VBUS;
		omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
		break;

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

		musb->xceiv->last_event = USB_EVENT_NONE;
		musb_set_peripheral(musb);
		otg_set_vbus(musb->xceiv->otg, 0);
		omap_control_usb_set_mode(glue->control_otghs,
			USB_MODE_DISCONNECT);
		break;
	default:
		dev_dbg(musb->controller, "ID float\n");
	}
	pm_runtime_mark_last_busy(musb->controller);
	pm_runtime_put_autosuspend(musb->controller);
	atomic_notifier_call_chain(&musb->xceiv->notifier,
			musb->xceiv->last_event, NULL);
}


static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
{
	struct omap2430_glue *glue = container_of(mailbox_work,
				struct omap2430_glue, omap_musb_mailbox_work);

	omap_musb_set_mailbox(glue);
}

static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
{
	unsigned long   flags;
	irqreturn_t     retval = IRQ_NONE;
	struct musb     *musb = __hci;

	spin_lock_irqsave(&musb->lock, flags);

	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);

	if (musb->int_usb || musb->int_tx || musb->int_rx)
		retval = musb_interrupt(musb);

	spin_unlock_irqrestore(&musb->lock, flags);

	return retval;
}

static int omap2430_musb_init(struct musb *musb)
{
	u32 l;
	int status = 0;
	struct device *dev = musb->controller;
	struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
	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->phy = devm_phy_get(dev->parent, "usb2-phy");

	/* We can't totally remove musb->xceiv as of now because
	 * musb core uses xceiv.state and xceiv.otg. Once we have
	 * a separate state machine to handle otg, these can be moved
	 * out of xceiv and then we can start using the generic PHY
	 * framework
	 */
	musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "usb-phy", 0);

	if (IS_ERR(musb->xceiv)) {
		status = PTR_ERR(musb->xceiv);

		if (status == -ENXIO)
			return status;

		dev_dbg(dev, "HS USB OTG: no transceiver configured\n");
		return -EPROBE_DEFER;
	}

	if (IS_ERR(musb->phy)) {
		dev_err(dev, "HS USB OTG: no PHY configured\n");
		return PTR_ERR(musb->phy);
	}
	musb->isr = omap2430_musb_interrupt;
	phy_init(musb->phy);
	phy_power_on(musb->phy);

	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);

	dev_dbg(dev, "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));

	return 0;
}

static void omap2430_musb_enable(struct musb *musb)
{
	struct device *dev = musb->controller;
	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);

	if (glue->status == MUSB_UNKNOWN)
		glue->status = MUSB_VBUS_OFF;
	omap_musb_set_mailbox(glue);
}

static void omap2430_musb_disable(struct musb *musb)
{
	struct device *dev = musb->controller;
	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);

	if (glue->status != MUSB_UNKNOWN)
		omap_control_usb_set_mode(glue->control_otghs,
			USB_MODE_DISCONNECT);
}

static int omap2430_musb_exit(struct musb *musb)
{
	struct device *dev = musb->controller;
	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);

	omap2430_low_level_exit(musb);
	phy_power_off(musb->phy);
	phy_exit(musb->phy);
	musb->phy = NULL;
	cancel_work_sync(&glue->omap_musb_mailbox_work);

	return 0;
}

static const struct musb_platform_ops omap2430_ops = {
	.quirks		= MUSB_DMA_INVENTRA,
#ifdef CONFIG_USB_INVENTRA_DMA
	.dma_init	= musbhs_dma_controller_create,
	.dma_exit	= musbhs_dma_controller_destroy,
#endif
	.init		= omap2430_musb_init,
	.exit		= omap2430_musb_exit,

	.enable		= omap2430_musb_enable,
	.disable	= omap2430_musb_disable,

	.phy_callback	= omap2430_musb_mailbox,
};

static u64 omap2430_dmamask = DMA_BIT_MASK(32);

static int omap2430_probe(struct platform_device *pdev)
{
	struct musb_hdrc_platform_data	*pdata = dev_get_platdata(&pdev->dev);
	struct omap_musb_board_data	*data;
	struct platform_device		*musb;
	struct omap2430_glue		*glue;
	struct device_node		*np = pdev->dev.of_node;
	struct musb_hdrc_config		*config;
	struct device_node		*control_node;
	struct platform_device		*control_pdev;
	int				ret = -ENOMEM, val;
	bool				populate_irqs = false;

	if (!np)
		return -ENODEV;

	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
	if (!glue)
		goto err0;

	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
	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;

	/*
	 * Legacy SoCs using omap_device get confused if node is moved
	 * because of interconnect properties mixed into the node.
	 */
	if (of_property_present(np, "ti,hwmods")) {
		dev_warn(&pdev->dev, "please update to probe with ti-sysc\n");
		populate_irqs = true;
	} else {
		device_set_of_node_from_dev(&musb->dev, &pdev->dev);
	}
	of_node_put(np);

	glue->dev			= &pdev->dev;
	glue->musb			= musb;
	glue->status			= MUSB_UNKNOWN;
	glue->control_otghs = ERR_PTR(-ENODEV);

	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		goto err2;

	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		goto err2;

	config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
	if (!config)
		goto err2;

	of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
	of_property_read_u32(np, "interface-type",
			(u32 *)&data->interface_type);
	of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
	of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
	of_property_read_u32(np, "power", (u32 *)&pdata->power);

	ret = of_property_read_u32(np, "multipoint", &val);
	if (!ret && val)
		config->multipoint = true;

	pdata->board_data	= data;
	pdata->config		= config;

	control_node = of_parse_phandle(np, "ctrl-module", 0);
	if (control_node) {
		control_pdev = of_find_device_by_node(control_node);
		of_node_put(control_node);
		if (!control_pdev) {
			dev_err(&pdev->dev, "Failed to get control device\n");
			ret = -EINVAL;
			goto err2;
		}
		glue->control_otghs = &control_pdev->dev;
	}

	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 err2;
	}

	if (populate_irqs) {
		struct resource musb_res[3];
		struct resource *res;
		int i = 0;

		memset(musb_res, 0, sizeof(*musb_res) * ARRAY_SIZE(musb_res));

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!res) {
			ret = -EINVAL;
			goto err2;
		}

		musb_res[i].start = res->start;
		musb_res[i].end = res->end;
		musb_res[i].flags = res->flags;
		musb_res[i].name = res->name;
		i++;

		ret = of_irq_get_byname(np, "mc");
		if (ret > 0) {
			musb_res[i].start = ret;
			musb_res[i].flags = IORESOURCE_IRQ;
			musb_res[i].name = "mc";
			i++;
		}

		ret = of_irq_get_byname(np, "dma");
		if (ret > 0) {
			musb_res[i].start = ret;
			musb_res[i].flags = IORESOURCE_IRQ;
			musb_res[i].name = "dma";
			i++;
		}

		ret = platform_device_add_resources(musb, musb_res, i);
		if (ret) {
			dev_err(&pdev->dev, "failed to add IRQ 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;
	}

	pm_runtime_enable(glue->dev);

	ret = platform_device_add(musb);
	if (ret) {
		dev_err(&pdev->dev, "failed to register musb device\n");
		goto err3;
	}

	return 0;

err3:
	pm_runtime_disable(glue->dev);

err2:
	platform_device_put(musb);

err0:
	return ret;
}

static void omap2430_remove(struct platform_device *pdev)
{
	struct omap2430_glue *glue = platform_get_drvdata(pdev);

	platform_device_unregister(glue->musb);
	pm_runtime_disable(glue->dev);
}

#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)
		return 0;

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

	omap2430_low_level_exit(musb);

	if (!glue->phy_suspended) {
		phy_power_off(musb->phy);
		phy_exit(musb->phy);
	}

	glue->is_runtime_suspended = 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)
		return 0;

	if (!glue->phy_suspended) {
		phy_init(musb->phy);
		phy_power_on(musb->phy);
	}

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

	/* Wait for musb to get oriented. Otherwise we can get babble */
	usleep_range(200000, 250000);

	glue->is_runtime_suspended = 0;

	return 0;
}

/* I2C and SPI PHYs need to be suspended before the glue layer */
static int omap2430_suspend(struct device *dev)
{
	struct omap2430_glue *glue = dev_get_drvdata(dev);
	struct musb *musb = glue_to_musb(glue);

	phy_power_off(musb->phy);
	phy_exit(musb->phy);
	glue->phy_suspended = 1;

	return 0;
}

/* Glue layer needs to be suspended after musb_suspend() */
static int omap2430_suspend_late(struct device *dev)
{
	struct omap2430_glue *glue = dev_get_drvdata(dev);

	if (glue->is_runtime_suspended)
		return 0;

	glue->needs_resume = 1;

	return omap2430_runtime_suspend(dev);
}

static int omap2430_resume_early(struct device *dev)
{
	struct omap2430_glue *glue = dev_get_drvdata(dev);

	if (!glue->needs_resume)
		return 0;

	glue->needs_resume = 0;

	return omap2430_runtime_resume(dev);
}

static int omap2430_resume(struct device *dev)
{
	struct omap2430_glue *glue = dev_get_drvdata(dev);
	struct musb *musb = glue_to_musb(glue);

	phy_init(musb->phy);
	phy_power_on(musb->phy);
	glue->phy_suspended = 0;

	return 0;
}

static const struct dev_pm_ops omap2430_pm_ops = {
	.runtime_suspend = omap2430_runtime_suspend,
	.runtime_resume = omap2430_runtime_resume,
	.suspend = omap2430_suspend,
	.suspend_late = omap2430_suspend_late,
	.resume_early = omap2430_resume_early,
	.resume = omap2430_resume,
};

#define DEV_PM_OPS	(&omap2430_pm_ops)
#else
#define DEV_PM_OPS	NULL
#endif

#ifdef CONFIG_OF
static const struct of_device_id omap2430_id_table[] = {
	{
		.compatible = "ti,omap4-musb"
	},
	{
		.compatible = "ti,omap3-musb"
	},
	{},
};
MODULE_DEVICE_TABLE(of, omap2430_id_table);
#endif

static struct platform_driver omap2430_driver = {
	.probe		= omap2430_probe,
	.remove		= omap2430_remove,
	.driver		= {
		.name	= "musb-omap2430",
		.pm	= DEV_PM_OPS,
		.of_match_table = of_match_ptr(omap2430_id_table),
	},
};

module_platform_driver(omap2430_driver);

MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (C) 2005-2007 by Texas Instruments
	4	* Some code has been taken from tusb6010.c
	5	* Copyrights for that are attributable to:
	6	* Copyright (C) 2006 Nokia Corporation
	7	* Tony Lindgren <tony@atomide.com>
	8	*
	9	* This file is part of the Inventra Controller Driver for Linux.
	10	*/
	11	#include <linux/module.h>
	12	#include <linux/kernel.h>
	13	#include <linux/sched.h>
	14	#include <linux/init.h>
	15	#include <linux/list.h>
	16	#include <linux/io.h>
	17	#include <linux/of.h>
	18	#include <linux/of_irq.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/delay.h>
	24	#include <linux/usb/musb.h>
	25	#include <linux/phy/omap_control_phy.h>
	26	#include <linux/of_platform.h>
	27
	28	#include "musb_core.h"
	29	#include "omap2430.h"
	30
	31	struct omap2430_glue {
	32	struct device *dev;
	33	struct platform_device *musb;
	34	enum musb_vbus_id_status status;
	35	struct work_struct omap_musb_mailbox_work;
	36	struct device *control_otghs;
	37	unsigned int is_runtime_suspended:1;
	38	unsigned int needs_resume:1;
	39	unsigned int phy_suspended:1;
	40	};
	41	#define glue_to_musb(g) platform_get_drvdata(g->musb)
	42
	43	static struct omap2430_glue *_glue;
	44
	45	static inline void omap2430_low_level_exit(struct musb *musb)
	46	{
	47	u32 l;
	48
	49	/* in any role */
	50	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	51	l \|= ENABLEFORCE; /* enable MSTANDBY */
	52	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
	53	}
	54
	55	static inline void omap2430_low_level_init(struct musb *musb)
	56	{
	57	u32 l;
	58
	59	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	60	l &= ~ENABLEFORCE; /* disable MSTANDBY */
	61	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
	62	}
	63
	64	static int omap2430_musb_mailbox(enum musb_vbus_id_status status)
	65	{
	66	struct omap2430_glue *glue = _glue;
	67
	68	if (!glue) {
	69	pr_err("%s: musb core is not yet initialized\n", __func__);
	70	return -EPROBE_DEFER;
	71	}
	72	glue->status = status;
	73
	74	if (!glue_to_musb(glue)) {
	75	pr_err("%s: musb core is not yet ready\n", __func__);
	76	return -EPROBE_DEFER;
	77	}
	78
	79	schedule_work(&glue->omap_musb_mailbox_work);
	80
	81	return 0;
	82	}
	83
	84	/*
	85	* HDRC controls CPEN, but beware current surges during device connect.
	86	* They can trigger transient overcurrent conditions that must be ignored.
	87	*
	88	* Note that we're skipping A_WAIT_VFALL -> A_IDLE and jumping right to B_IDLE
	89	* as set by musb_set_peripheral().
	90	*/
	91	static void omap_musb_set_mailbox(struct omap2430_glue *glue)
	92	{
	93	struct musb *musb = glue_to_musb(glue);
	94	int error;
	95
	96	pm_runtime_get_sync(musb->controller);
	97
	98	dev_dbg(musb->controller, "VBUS %s, devctl %02x\n",
	99	usb_otg_state_string(musb->xceiv->otg->state),
	100	musb_readb(musb->mregs, MUSB_DEVCTL));
	101
	102	switch (glue->status) {
	103	case MUSB_ID_GROUND:
	104	dev_dbg(musb->controller, "ID GND\n");
	105	switch (musb->xceiv->otg->state) {
	106	case OTG_STATE_A_IDLE:
	107	error = musb_set_host(musb);
	108	if (error)
	109	break;
	110	musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
	111	fallthrough;
	112	case OTG_STATE_A_WAIT_VRISE:
	113	case OTG_STATE_A_WAIT_BCON:
	114	case OTG_STATE_A_HOST:
	115	/*
	116	* On multiple ID ground interrupts just keep enabling
	117	* VBUS. At least cpcap VBUS shuts down otherwise.
	118	*/
	119	otg_set_vbus(musb->xceiv->otg, 1);
	120	break;
	121	default:
	122	musb->xceiv->otg->state = OTG_STATE_A_IDLE;
	123	musb->xceiv->last_event = USB_EVENT_ID;
	124	if (musb->gadget_driver) {
	125	omap_control_usb_set_mode(glue->control_otghs,
	126	USB_MODE_HOST);
	127	otg_set_vbus(musb->xceiv->otg, 1);
	128	}
	129	break;
	130	}
	131	break;
	132
	133	case MUSB_VBUS_VALID:
	134	dev_dbg(musb->controller, "VBUS Connect\n");
	135
	136	musb->xceiv->otg->state = OTG_STATE_B_IDLE;
	137	musb->xceiv->last_event = USB_EVENT_VBUS;
	138	omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
	139	break;
	140
	141	case MUSB_ID_FLOAT:
	142	case MUSB_VBUS_OFF:
	143	dev_dbg(musb->controller, "VBUS Disconnect\n");
	144
	145	musb->xceiv->last_event = USB_EVENT_NONE;
	146	musb_set_peripheral(musb);
	147	otg_set_vbus(musb->xceiv->otg, 0);
	148	omap_control_usb_set_mode(glue->control_otghs,
	149	USB_MODE_DISCONNECT);
	150	break;
	151	default:
	152	dev_dbg(musb->controller, "ID float\n");
	153	}
	154	pm_runtime_mark_last_busy(musb->controller);
	155	pm_runtime_put_autosuspend(musb->controller);
	156	atomic_notifier_call_chain(&musb->xceiv->notifier,
	157	musb->xceiv->last_event, NULL);
	158	}
	159
	160
	161	static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
	162	{
	163	struct omap2430_glue *glue = container_of(mailbox_work,
	164	struct omap2430_glue, omap_musb_mailbox_work);
	165
	166	omap_musb_set_mailbox(glue);
	167	}
	168
	169	static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
	170	{
	171	unsigned long flags;
	172	irqreturn_t retval = IRQ_NONE;
	173	struct musb *musb = __hci;
	174
	175	spin_lock_irqsave(&musb->lock, flags);
	176
	177	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
	178	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
	179	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
	180
	181	if (musb->int_usb \|\| musb->int_tx \|\| musb->int_rx)
	182	retval = musb_interrupt(musb);
	183
	184	spin_unlock_irqrestore(&musb->lock, flags);
	185
	186	return retval;
	187	}
	188
	189	static int omap2430_musb_init(struct musb *musb)
	190	{
	191	u32 l;
	192	int status = 0;
	193	struct device *dev = musb->controller;
	194	struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
	195	struct omap_musb_board_data *data = plat->board_data;
	196
	197	/* We require some kind of external transceiver, hooked
	198	* up through ULPI. TWL4030-family PMICs include one,
	199	* which needs a driver, drivers aren't always needed.
	200	*/
	201	musb->phy = devm_phy_get(dev->parent, "usb2-phy");
	202
	203	/* We can't totally remove musb->xceiv as of now because
	204	* musb core uses xceiv.state and xceiv.otg. Once we have
	205	* a separate state machine to handle otg, these can be moved
	206	* out of xceiv and then we can start using the generic PHY
	207	* framework
	208	*/
	209	musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "usb-phy", 0);
	210
	211	if (IS_ERR(musb->xceiv)) {
	212	status = PTR_ERR(musb->xceiv);
	213
	214	if (status == -ENXIO)
	215	return status;
	216
	217	dev_dbg(dev, "HS USB OTG: no transceiver configured\n");
	218	return -EPROBE_DEFER;
	219	}
	220
	221	if (IS_ERR(musb->phy)) {
	222	dev_err(dev, "HS USB OTG: no PHY configured\n");
	223	return PTR_ERR(musb->phy);
	224	}
	225	musb->isr = omap2430_musb_interrupt;
	226	phy_init(musb->phy);
	227	phy_power_on(musb->phy);
	228
	229	l = musb_readl(musb->mregs, OTG_INTERFSEL);
	230
	231	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	232	/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
	233	l &= ~ULPI_12PIN; /* Disable ULPI */
	234	l \|= UTMI_8BIT; /* Enable UTMI */
	235	} else {
	236	l \|= ULPI_12PIN;
	237	}
	238
	239	musb_writel(musb->mregs, OTG_INTERFSEL, l);
	240
	241	dev_dbg(dev, "HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
	242	"sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
	243	musb_readl(musb->mregs, OTG_REVISION),
	244	musb_readl(musb->mregs, OTG_SYSCONFIG),
	245	musb_readl(musb->mregs, OTG_SYSSTATUS),
	246	musb_readl(musb->mregs, OTG_INTERFSEL),
	247	musb_readl(musb->mregs, OTG_SIMENABLE));
	248
	249	return 0;
	250	}
	251
	252	static void omap2430_musb_enable(struct musb *musb)
	253	{
	254	struct device *dev = musb->controller;
	255	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	256
	257	if (glue->status == MUSB_UNKNOWN)
	258	glue->status = MUSB_VBUS_OFF;
	259	omap_musb_set_mailbox(glue);
	260	}
	261
	262	static void omap2430_musb_disable(struct musb *musb)
	263	{
	264	struct device *dev = musb->controller;
	265	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	266
	267	if (glue->status != MUSB_UNKNOWN)
	268	omap_control_usb_set_mode(glue->control_otghs,
	269	USB_MODE_DISCONNECT);
	270	}
	271
	272	static int omap2430_musb_exit(struct musb *musb)
	273	{
	274	struct device *dev = musb->controller;
	275	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	276
	277	omap2430_low_level_exit(musb);
	278	phy_power_off(musb->phy);
	279	phy_exit(musb->phy);
	280	musb->phy = NULL;
	281	cancel_work_sync(&glue->omap_musb_mailbox_work);
	282
	283	return 0;
	284	}
	285
	286	static const struct musb_platform_ops omap2430_ops = {
	287	.quirks = MUSB_DMA_INVENTRA,
	288	#ifdef CONFIG_USB_INVENTRA_DMA
	289	.dma_init = musbhs_dma_controller_create,
	290	.dma_exit = musbhs_dma_controller_destroy,
	291	#endif
	292	.init = omap2430_musb_init,
	293	.exit = omap2430_musb_exit,
	294
	295	.enable = omap2430_musb_enable,
	296	.disable = omap2430_musb_disable,
	297
	298	.phy_callback = omap2430_musb_mailbox,
	299	};
	300
	301	static u64 omap2430_dmamask = DMA_BIT_MASK(32);
	302
	303	static int omap2430_probe(struct platform_device *pdev)
	304	{
	305	struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
	306	struct omap_musb_board_data *data;
	307	struct platform_device *musb;
	308	struct omap2430_glue *glue;
	309	struct device_node *np = pdev->dev.of_node;
	310	struct musb_hdrc_config *config;
	311	struct device_node *control_node;
	312	struct platform_device *control_pdev;
	313	int ret = -ENOMEM, val;
	314	bool populate_irqs = false;
	315
	316	if (!np)
	317	return -ENODEV;
	318
	319	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
	320	if (!glue)
	321	goto err0;
	322
	323	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
	324	if (!musb) {
	325	dev_err(&pdev->dev, "failed to allocate musb device\n");
	326	goto err0;
	327	}
	328
	329	musb->dev.parent = &pdev->dev;
	330	musb->dev.dma_mask = &omap2430_dmamask;
	331	musb->dev.coherent_dma_mask = omap2430_dmamask;
	332
	333	/*
	334	* Legacy SoCs using omap_device get confused if node is moved
	335	* because of interconnect properties mixed into the node.
	336	*/
	337	if (of_property_present(np, "ti,hwmods")) {
	338	dev_warn(&pdev->dev, "please update to probe with ti-sysc\n");
	339	populate_irqs = true;
	340	} else {
	341	device_set_of_node_from_dev(&musb->dev, &pdev->dev);
	342	}
	343	of_node_put(np);
	344
	345	glue->dev = &pdev->dev;
	346	glue->musb = musb;
	347	glue->status = MUSB_UNKNOWN;
	348	glue->control_otghs = ERR_PTR(-ENODEV);
	349
	350	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	351	if (!pdata)
	352	goto err2;
	353
	354	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	355	if (!data)
	356	goto err2;
	357
	358	config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
	359	if (!config)
	360	goto err2;
	361
	362	of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
	363	of_property_read_u32(np, "interface-type",
	364	(u32 *)&data->interface_type);
	365	of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
	366	of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
	367	of_property_read_u32(np, "power", (u32 *)&pdata->power);
	368
	369	ret = of_property_read_u32(np, "multipoint", &val);
	370	if (!ret && val)
	371	config->multipoint = true;
	372
	373	pdata->board_data = data;
	374	pdata->config = config;
	375
	376	control_node = of_parse_phandle(np, "ctrl-module", 0);
	377	if (control_node) {
	378	control_pdev = of_find_device_by_node(control_node);
	379	of_node_put(control_node);
	380	if (!control_pdev) {
	381	dev_err(&pdev->dev, "Failed to get control device\n");
	382	ret = -EINVAL;
	383	goto err2;
	384	}
	385	glue->control_otghs = &control_pdev->dev;
	386	}
	387
	388	pdata->platform_ops = &omap2430_ops;
	389
	390	platform_set_drvdata(pdev, glue);
	391
	392	/*
	393	* REVISIT if we ever have two instances of the wrapper, we will be
	394	* in big trouble
	395	*/
	396	_glue = glue;
	397
	398	INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
	399
	400	ret = platform_device_add_resources(musb, pdev->resource, pdev->num_resources);
	401	if (ret) {
	402	dev_err(&pdev->dev, "failed to add resources\n");
	403	goto err2;
	404	}
	405
	406	if (populate_irqs) {
	407	struct resource musb_res[3];
	408	struct resource *res;
	409	int i = 0;
	410
	411	memset(musb_res, 0, sizeof(musb_res) ARRAY_SIZE(musb_res));
	412
	413	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	414	if (!res) {
	415	ret = -EINVAL;
	416	goto err2;
	417	}
	418
	419	musb_res[i].start = res->start;
	420	musb_res[i].end = res->end;
	421	musb_res[i].flags = res->flags;
	422	musb_res[i].name = res->name;
	423	i++;
	424
	425	ret = of_irq_get_byname(np, "mc");
	426	if (ret > 0) {
	427	musb_res[i].start = ret;
	428	musb_res[i].flags = IORESOURCE_IRQ;
	429	musb_res[i].name = "mc";
	430	i++;
	431	}
	432
	433	ret = of_irq_get_byname(np, "dma");
	434	if (ret > 0) {
	435	musb_res[i].start = ret;
	436	musb_res[i].flags = IORESOURCE_IRQ;
	437	musb_res[i].name = "dma";
	438	i++;
	439	}
	440
	441	ret = platform_device_add_resources(musb, musb_res, i);
	442	if (ret) {
	443	dev_err(&pdev->dev, "failed to add IRQ resources\n");
	444	goto err2;
	445	}
	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");
	451	goto err2;
	452	}
	453
	454	pm_runtime_enable(glue->dev);
	455
	456	ret = platform_device_add(musb);
	457	if (ret) {
	458	dev_err(&pdev->dev, "failed to register musb device\n");
	459	goto err3;
	460	}
	461
	462	return 0;
	463
	464	err3:
	465	pm_runtime_disable(glue->dev);
	466
	467	err2:
	468	platform_device_put(musb);
	469
	470	err0:
	471	return ret;
	472	}
	473
	474	static void omap2430_remove(struct platform_device *pdev)
	475	{
	476	struct omap2430_glue *glue = platform_get_drvdata(pdev);
	477
	478	platform_device_unregister(glue->musb);
	479	pm_runtime_disable(glue->dev);
	480	}
	481
	482	#ifdef CONFIG_PM
	483
	484	static int omap2430_runtime_suspend(struct device *dev)
	485	{
	486	struct omap2430_glue *glue = dev_get_drvdata(dev);
	487	struct musb *musb = glue_to_musb(glue);
	488
	489	if (!musb)
	490	return 0;
	491
	492	musb->context.otg_interfsel = musb_readl(musb->mregs,
	493	OTG_INTERFSEL);
	494
	495	omap2430_low_level_exit(musb);
	496
	497	if (!glue->phy_suspended) {
	498	phy_power_off(musb->phy);
	499	phy_exit(musb->phy);
	500	}
	501
	502	glue->is_runtime_suspended = 1;
	503
	504	return 0;
	505	}
	506
	507	static int omap2430_runtime_resume(struct device *dev)
	508	{
	509	struct omap2430_glue *glue = dev_get_drvdata(dev);
	510	struct musb *musb = glue_to_musb(glue);
	511
	512	if (!musb)
	513	return 0;
	514
	515	if (!glue->phy_suspended) {
	516	phy_init(musb->phy);
	517	phy_power_on(musb->phy);
	518	}
	519
	520	omap2430_low_level_init(musb);
	521	musb_writel(musb->mregs, OTG_INTERFSEL,
	522	musb->context.otg_interfsel);
	523
	524	/* Wait for musb to get oriented. Otherwise we can get babble */
	525	usleep_range(200000, 250000);
	526
	527	glue->is_runtime_suspended = 0;
	528
	529	return 0;
	530	}
	531
	532	/* I2C and SPI PHYs need to be suspended before the glue layer */
	533	static int omap2430_suspend(struct device *dev)
	534	{
	535	struct omap2430_glue *glue = dev_get_drvdata(dev);
	536	struct musb *musb = glue_to_musb(glue);
	537
	538	phy_power_off(musb->phy);
	539	phy_exit(musb->phy);
	540	glue->phy_suspended = 1;
	541
	542	return 0;
	543	}
	544
	545	/* Glue layer needs to be suspended after musb_suspend() */
	546	static int omap2430_suspend_late(struct device *dev)
	547	{
	548	struct omap2430_glue *glue = dev_get_drvdata(dev);
	549
	550	if (glue->is_runtime_suspended)
	551	return 0;
	552
	553	glue->needs_resume = 1;
	554
	555	return omap2430_runtime_suspend(dev);
	556	}
	557
	558	static int omap2430_resume_early(struct device *dev)
	559	{
	560	struct omap2430_glue *glue = dev_get_drvdata(dev);
	561
	562	if (!glue->needs_resume)
	563	return 0;
	564
	565	glue->needs_resume = 0;
	566
	567	return omap2430_runtime_resume(dev);
	568	}
	569
	570	static int omap2430_resume(struct device *dev)
	571	{
	572	struct omap2430_glue *glue = dev_get_drvdata(dev);
	573	struct musb *musb = glue_to_musb(glue);
	574
	575	phy_init(musb->phy);
	576	phy_power_on(musb->phy);
	577	glue->phy_suspended = 0;
	578
	579	return 0;
	580	}
	581
	582	static const struct dev_pm_ops omap2430_pm_ops = {
	583	.runtime_suspend = omap2430_runtime_suspend,
	584	.runtime_resume = omap2430_runtime_resume,
	585	.suspend = omap2430_suspend,
	586	.suspend_late = omap2430_suspend_late,
	587	.resume_early = omap2430_resume_early,
	588	.resume = omap2430_resume,
	589	};
	590
	591	#define DEV_PM_OPS (&omap2430_pm_ops)
	592	#else
	593	#define DEV_PM_OPS NULL
	594	#endif
	595
	596	#ifdef CONFIG_OF
	597	static const struct of_device_id omap2430_id_table[] = {
	598	{
	599	.compatible = "ti,omap4-musb"
	600	},
	601	{
	602	.compatible = "ti,omap3-musb"
	603	},
	604	{},
	605	};
	606	MODULE_DEVICE_TABLE(of, omap2430_id_table);
	607	#endif
	608
	609	static struct platform_driver omap2430_driver = {
	610	.probe = omap2430_probe,
	611	.remove = omap2430_remove,
	612	.driver = {
	613	.name = "musb-omap2430",
	614	.pm = DEV_PM_OPS,
	615	.of_match_table = of_match_ptr(omap2430_id_table),
	616	},
	617	};
	618
	619	module_platform_driver(omap2430_driver);
	620
	621	MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
	622	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
	623	MODULE_LICENSE("GPL v2");