[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/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;

	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;

	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);
		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;
	}

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

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

	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)
		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
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0
550a7375 FB	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
550a7375 FB	7	* Tony Lindgren <tony@atomide.com>
	8	*
	9	* This file is part of the Inventra Controller Driver for Linux.
550a7375 FB	10	*/
	11	#include <linux/module.h>
	12	#include <linux/kernel.h>
	13	#include <linux/sched.h>
550a7375 FB	14	#include <linux/init.h>
550a7375 FB	15	#include <linux/list.h>
550a7375	16	#include <linux/io.h>
00a0b1d5	17	#include <linux/of.h>
dc09886b FB	18	#include <linux/platform_device.h>
dc09886b FB	19	#include <linux/dma-mapping.h>
207b0e1f HH	20	#include <linux/pm_runtime.h>
207b0e1f HH	21	#include <linux/err.h>
12a19b5f	22	#include <linux/delay.h>
8055555f	23	#include <linux/usb/musb.h>
14da699b	24	#include <linux/phy/omap_control_phy.h>
8934d3e4	25	#include <linux/of_platform.h>
550a7375	26
550a7375 FB	27	#include "musb_core.h"
	28	#include "omap2430.h"
	29
a3cee12a FB	30	struct omap2430_glue {
	31	struct device *dev;
	32	struct platform_device *musb;
8055555f	33	enum musb_vbus_id_status status;
1e5acb8d	34	struct work_struct omap_musb_mailbox_work;
ca784be3	35	struct device *control_otghs;
62d472d8 TL	36	unsigned int is_runtime_suspended:1;
62d472d8 TL	37	unsigned int needs_resume:1;
68d9f95d	38	unsigned int phy_suspended:1;
a3cee12a	39	};
c20aebb9	40	#define glue_to_musb(g) platform_get_drvdata(g->musb)
a3cee12a	41
4b58ed11	42	static struct omap2430_glue *_glue;
c9721438	43
c20aebb9 FB	44	static inline void omap2430_low_level_exit(struct musb *musb)
	45	{
	46	u32 l;
	47
	48	/* in any role */
	49	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	50	l \|= ENABLEFORCE; /* enable MSTANDBY */
	51	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
c20aebb9 FB	52	}
	53
	54	static inline void omap2430_low_level_init(struct musb *musb)
	55	{
	56	u32 l;
	57
c20aebb9 FB	58	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	59	l &= ~ENABLEFORCE; /* disable MSTANDBY */
	60	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
	61	}
	62
12b7db2b	63	static int omap2430_musb_mailbox(enum musb_vbus_id_status status)
594632ef	64	{
c9721438	65	struct omap2430_glue *glue = _glue;
712d8efa	66
f8c4b0e7 AK	67	if (!glue) {
f8c4b0e7 AK	68	pr_err("%s: musb core is not yet initialized\n", __func__);
12b7db2b	69	return -EPROBE_DEFER;
f8c4b0e7 AK	70	}
	71	glue->status = status;
	72
	73	if (!glue_to_musb(glue)) {
80ab72e1	74	pr_err("%s: musb core is not yet ready\n", __func__);
12b7db2b	75	return -EPROBE_DEFER;
c9721438	76	}
712d8efa	77
c9721438	78	schedule_work(&glue->omap_musb_mailbox_work);
12b7db2b TL	79
12b7db2b TL	80	return 0;
712d8efa VP	81	}
712d8efa VP	82
98827105 TL	83	/*
	84	* HDRC controls CPEN, but beware current surges during device connect.
	85	* They can trigger transient overcurrent conditions that must be ignored.
	86	*
	87	* Note that we're skipping A_WAIT_VFALL -> A_IDLE and jumping right to B_IDLE
	88	* as set by musb_set_peripheral().
	89	*/
c9721438	90	static void omap_musb_set_mailbox(struct omap2430_glue *glue)
712d8efa	91	{
1e5acb8d	92	struct musb *musb = glue_to_musb(glue);
98827105	93	int error;
594632ef	94
ae909fe4	95	pm_runtime_get_sync(musb->controller);
98827105 TL	96
	97	dev_dbg(musb->controller, "VBUS %s, devctl %02x\n",
	98	usb_otg_state_string(musb->xceiv->otg->state),
	99	musb_readb(musb->mregs, MUSB_DEVCTL));
	100
c9721438	101	switch (glue->status) {
8055555f	102	case MUSB_ID_GROUND:
ae909fe4	103	dev_dbg(musb->controller, "ID GND\n");
15f1122f	104	switch (musb->xceiv->otg->state) {
98827105 TL	105	case OTG_STATE_A_IDLE:
	106	error = musb_set_host(musb);
	107	if (error)
	108	break;
	109	musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
df561f66	110	fallthrough;
15f1122f TL	111	case OTG_STATE_A_WAIT_VRISE:
	112	case OTG_STATE_A_WAIT_BCON:
	113	case OTG_STATE_A_HOST:
15f1122f TL	114	/*
	115	* On multiple ID ground interrupts just keep enabling
	116	* VBUS. At least cpcap VBUS shuts down otherwise.
	117	*/
98827105	118	otg_set_vbus(musb->xceiv->otg, 1);
15f1122f TL	119	break;
	120	default:
	121	musb->xceiv->otg->state = OTG_STATE_A_IDLE;
	122	musb->xceiv->last_event = USB_EVENT_ID;
	123	if (musb->gadget_driver) {
	124	omap_control_usb_set_mode(glue->control_otghs,
	125	USB_MODE_HOST);
98827105	126	otg_set_vbus(musb->xceiv->otg, 1);
15f1122f TL	127	}
15f1122f TL	128	break;
594632ef HH	129	}
	130	break;
	131
8055555f	132	case MUSB_VBUS_VALID:
ae909fe4	133	dev_dbg(musb->controller, "VBUS Connect\n");
594632ef	134
e47d9254	135	musb->xceiv->otg->state = OTG_STATE_B_IDLE;
c9721438	136	musb->xceiv->last_event = USB_EVENT_VBUS;
ca784be3	137	omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
594632ef HH	138	break;
594632ef HH	139
8055555f TL	140	case MUSB_ID_FLOAT:
8055555f TL	141	case MUSB_VBUS_OFF:
ae909fe4	142	dev_dbg(musb->controller, "VBUS Disconnect\n");
594632ef	143
c9721438	144	musb->xceiv->last_event = USB_EVENT_NONE;
98827105 TL	145	musb_set_peripheral(musb);
98827105 TL	146	otg_set_vbus(musb->xceiv->otg, 0);
ca784be3 KVA	147	omap_control_usb_set_mode(glue->control_otghs,
ca784be3 KVA	148	USB_MODE_DISCONNECT);
594632ef HH	149	break;
594632ef HH	150	default:
ae909fe4	151	dev_dbg(musb->controller, "ID float\n");
594632ef	152	}
ae909fe4 TL	153	pm_runtime_mark_last_busy(musb->controller);
ae909fe4 TL	154	pm_runtime_put_autosuspend(musb->controller);
6fa7178c PR	155	atomic_notifier_call_chain(&musb->xceiv->notifier,
6fa7178c PR	156	musb->xceiv->last_event, NULL);
594632ef HH	157	}
594632ef HH	158
c9721438 KVA	159
	160	static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
	161	{
	162	struct omap2430_glue *glue = container_of(mailbox_work,
	163	struct omap2430_glue, omap_musb_mailbox_work);
8b2bc2c9	164
c9721438 KVA	165	omap_musb_set_mailbox(glue);
	166	}
	167
baef653a PDS	168	static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
	169	{
	170	unsigned long flags;
	171	irqreturn_t retval = IRQ_NONE;
	172	struct musb *musb = __hci;
	173
	174	spin_lock_irqsave(&musb->lock, flags);
	175
	176	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
	177	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
	178	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
	179
	180	if (musb->int_usb \|\| musb->int_tx \|\| musb->int_rx)
	181	retval = musb_interrupt(musb);
	182
	183	spin_unlock_irqrestore(&musb->lock, flags);
	184
	185	return retval;
	186	}
	187
743411b3	188	static int omap2430_musb_init(struct musb *musb)
550a7375	189	{
ad579699 S	190	u32 l;
ad579699 S	191	int status = 0;
ea65df57	192	struct device *dev = musb->controller;
c1a7d67c	193	struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
ea65df57	194	struct omap_musb_board_data *data = plat->board_data;
550a7375	195
84e250ff DB	196	/* We require some kind of external transceiver, hooked
	197	* up through ULPI. TWL4030-family PMICs include one,
	198	* which needs a driver, drivers aren't always needed.
	199	*/
5ee1787e JH	200	musb->phy = devm_phy_get(dev->parent, "usb2-phy");
	201
	202	/* We can't totally remove musb->xceiv as of now because
	203	* musb core uses xceiv.state and xceiv.otg. Once we have
	204	* a separate state machine to handle otg, these can be moved
	205	* out of xceiv and then we can start using the generic PHY
	206	* framework
	207	*/
	208	musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "usb-phy", 0);
b16604f2	209
a90199bb FB	210	if (IS_ERR(musb->xceiv)) {
	211	status = PTR_ERR(musb->xceiv);
	212
	213	if (status == -ENXIO)
	214	return status;
	215
dc66ba8d	216	dev_dbg(dev, "HS USB OTG: no transceiver configured\n");
25736e0c	217	return -EPROBE_DEFER;
84e250ff DB	218	}
84e250ff DB	219
3e3101d5	220	if (IS_ERR(musb->phy)) {
71127a79	221	dev_err(dev, "HS USB OTG: no PHY configured\n");
3e3101d5 KVA	222	return PTR_ERR(musb->phy);
3e3101d5 KVA	223	}
baef653a	224	musb->isr = omap2430_musb_interrupt;
a83e17d0	225	phy_init(musb->phy);
d8e5f0ec	226	phy_power_on(musb->phy);
baef653a	227
8573e6a6	228	l = musb_readl(musb->mregs, OTG_INTERFSEL);
de2e1b0c MM	229
	230	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	231	/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
	232	l &= ~ULPI_12PIN; /* Disable ULPI */
	233	l \|= UTMI_8BIT; /* Enable UTMI */
	234	} else {
	235	l \|= ULPI_12PIN;
	236	}
	237
8573e6a6	238	musb_writel(musb->mregs, OTG_INTERFSEL, l);
550a7375	239
71127a79	240	dev_dbg(dev, "HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
550a7375	241	"sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
8573e6a6 FB	242	musb_readl(musb->mregs, OTG_REVISION),
	243	musb_readl(musb->mregs, OTG_SYSCONFIG),
	244	musb_readl(musb->mregs, OTG_SYSSTATUS),
	245	musb_readl(musb->mregs, OTG_INTERFSEL),
	246	musb_readl(musb->mregs, OTG_SIMENABLE));
550a7375	247
550a7375 FB	248	return 0;
	249	}
	250
002eda13 HH	251	static void omap2430_musb_enable(struct musb *musb)
002eda13 HH	252	{
002eda13	253	struct device *dev = musb->controller;
c9721438	254	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
a83e17d0	255
8b359cbc TL	256	if (glue->status == MUSB_UNKNOWN)
	257	glue->status = MUSB_VBUS_OFF;
	258	omap_musb_set_mailbox(glue);
002eda13 HH	259	}
	260
	261	static void omap2430_musb_disable(struct musb *musb)
	262	{
c9721438 KVA	263	struct device *dev = musb->controller;
	264	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
	265
8055555f	266	if (glue->status != MUSB_UNKNOWN)
ca784be3 KVA	267	omap_control_usb_set_mode(glue->control_otghs,
ca784be3 KVA	268	USB_MODE_DISCONNECT);
550a7375 FB	269	}
550a7375 FB	270
743411b3	271	static int omap2430_musb_exit(struct musb *musb)
550a7375	272	{
a83e17d0 TL	273	struct device *dev = musb->controller;
a83e17d0 TL	274	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
550a7375	275
c20aebb9	276	omap2430_low_level_exit(musb);
d8e5f0ec	277	phy_power_off(musb->phy);
3e3101d5	278	phy_exit(musb->phy);
a83e17d0 TL	279	musb->phy = NULL;
a83e17d0 TL	280	cancel_work_sync(&glue->omap_musb_mailbox_work);
c20aebb9	281
550a7375 FB	282	return 0;
550a7375 FB	283	}
743411b3	284
f7ec9437	285	static const struct musb_platform_ops omap2430_ops = {
f8e9f34f	286	.quirks = MUSB_DMA_INVENTRA,
7f6283ed TL	287	#ifdef CONFIG_USB_INVENTRA_DMA
	288	.dma_init = musbhs_dma_controller_create,
	289	.dma_exit = musbhs_dma_controller_destroy,
	290	#endif
743411b3 FB	291	.init = omap2430_musb_init,
	292	.exit = omap2430_musb_exit,
	293
002eda13 HH	294	.enable = omap2430_musb_enable,
002eda13 HH	295	.disable = omap2430_musb_disable,
8055555f TL	296
8055555f TL	297	.phy_callback = omap2430_musb_mailbox,
743411b3	298	};
dc09886b FB	299
	300	static u64 omap2430_dmamask = DMA_BIT_MASK(32);
	301
41ac7b3a	302	static int omap2430_probe(struct platform_device *pdev)
dc09886b	303	{
c1a7d67c	304	struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
00a0b1d5	305	struct omap_musb_board_data *data;
dc09886b	306	struct platform_device *musb;
a3cee12a	307	struct omap2430_glue *glue;
00a0b1d5 KVA	308	struct device_node *np = pdev->dev.of_node;
00a0b1d5 KVA	309	struct musb_hdrc_config *config;
5ee1787e JH	310	struct device_node *control_node;
5ee1787e JH	311	struct platform_device *control_pdev;
606bf4d5	312	int ret = -ENOMEM, val;
dc09886b	313
5ee1787e JH	314	if (!np)
	315	return -ENODEV;
	316
b1183c24	317	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
af1bdfc9	318	if (!glue)
a3cee12a	319	goto err0;
a3cee12a	320
2f771164	321	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
dc09886b FB	322	if (!musb) {
dc09886b FB	323	dev_err(&pdev->dev, "failed to allocate musb device\n");
2f771164	324	goto err0;
dc09886b FB	325	}
	326
	327	musb->dev.parent = &pdev->dev;
	328	musb->dev.dma_mask = &omap2430_dmamask;
	329	musb->dev.coherent_dma_mask = omap2430_dmamask;
	330
a3cee12a FB	331	glue->dev = &pdev->dev;
a3cee12a FB	332	glue->musb = musb;
8055555f	333	glue->status = MUSB_UNKNOWN;
8934d3e4	334	glue->control_otghs = ERR_PTR(-ENODEV);
a3cee12a	335
5ee1787e JH	336	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	337	if (!pdata)
	338	goto err2;
	339
	340	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	341	if (!data)
	342	goto err2;
	343
	344	config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
	345	if (!config)
	346	goto err2;
	347
	348	of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
	349	of_property_read_u32(np, "interface-type",
	350	(u32 *)&data->interface_type);
	351	of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
	352	of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
	353	of_property_read_u32(np, "power", (u32 *)&pdata->power);
	354
	355	ret = of_property_read_u32(np, "multipoint", &val);
	356	if (!ret && val)
	357	config->multipoint = true;
	358
	359	pdata->board_data = data;
	360	pdata->config = config;
	361
	362	control_node = of_parse_phandle(np, "ctrl-module", 0);
	363	if (control_node) {
	364	control_pdev = of_find_device_by_node(control_node);
	365	if (!control_pdev) {
	366	dev_err(&pdev->dev, "Failed to get control device\n");
	367	ret = -EINVAL;
2f771164	368	goto err2;
ca784be3	369	}
5ee1787e	370	glue->control_otghs = &control_pdev->dev;
ca784be3	371	}
5ee1787e	372
f7ec9437 FB	373	pdata->platform_ops = &omap2430_ops;
f7ec9437 FB	374
a3cee12a	375	platform_set_drvdata(pdev, glue);
dc09886b	376
c9721438 KVA	377	/*
	378	* REVISIT if we ever have two instances of the wrapper, we will be
	379	* in big trouble
	380	*/
	381	_glue = glue;
	382
1e5acb8d KVA	383	INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
1e5acb8d KVA	384
9879c81b	385	ret = platform_device_add_resources(musb, pdev->resource, pdev->num_resources);
dc09886b FB	386	if (ret) {
dc09886b FB	387	dev_err(&pdev->dev, "failed to add resources\n");
65b3d52d	388	goto err2;
dc09886b FB	389	}
	390
	391	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	392	if (ret) {
	393	dev_err(&pdev->dev, "failed to add platform_data\n");
65b3d52d	394	goto err2;
dc09886b FB	395	}
dc09886b FB	396
87326e85	397	pm_runtime_enable(glue->dev);
3006dc8c	398
dc09886b FB	399	ret = platform_device_add(musb);
	400	if (ret) {
	401	dev_err(&pdev->dev, "failed to register musb device\n");
536d599d	402	goto err3;
dc09886b FB	403	}
dc09886b FB	404
207b0e1f	405	return 0;
03491761	406
536d599d TL	407	err3:
	408	pm_runtime_disable(glue->dev);
	409
65b3d52d	410	err2:
b1183c24	411	platform_device_put(musb);
a3cee12a	412
dc09886b FB	413	err0:
	414	return ret;
	415	}
	416
fb4e98ab	417	static int omap2430_remove(struct platform_device *pdev)
dc09886b	418	{
21f77bee	419	struct omap2430_glue *glue = platform_get_drvdata(pdev);
dc09886b	420
f039df58	421	platform_device_unregister(glue->musb);
03e43528	422	pm_runtime_disable(glue->dev);
dc09886b FB	423
	424	return 0;
	425	}
	426
c20aebb9	427	#ifdef CONFIG_PM
c20aebb9	428
7acc6197	429	static int omap2430_runtime_suspend(struct device *dev)
c20aebb9 FB	430	{
	431	struct omap2430_glue *glue = dev_get_drvdata(dev);
	432	struct musb *musb = glue_to_musb(glue);
	433
a83e17d0 TL	434	if (!musb)
a83e17d0 TL	435	return 0;
e25bec16	436
a83e17d0 TL	437	musb->context.otg_interfsel = musb_readl(musb->mregs,
	438	OTG_INTERFSEL);
	439
	440	omap2430_low_level_exit(musb);
c20aebb9	441
68d9f95d TL	442	if (!glue->phy_suspended) {
	443	phy_power_off(musb->phy);
	444	phy_exit(musb->phy);
	445	}
10ac7e77	446
62d472d8 TL	447	glue->is_runtime_suspended = 1;
62d472d8 TL	448
c20aebb9 FB	449	return 0;
	450	}
	451
7acc6197	452	static int omap2430_runtime_resume(struct device *dev)
c20aebb9 FB	453	{
	454	struct omap2430_glue *glue = dev_get_drvdata(dev);
	455	struct musb *musb = glue_to_musb(glue);
c20aebb9	456
8f2279d5	457	if (!musb)
a83e17d0	458	return 0;
8f2279d5	459
68d9f95d TL	460	if (!glue->phy_suspended) {
	461	phy_init(musb->phy);
	462	phy_power_on(musb->phy);
	463	}
10ac7e77	464
8f2279d5 TL	465	omap2430_low_level_init(musb);
	466	musb_writel(musb->mregs, OTG_INTERFSEL,
	467	musb->context.otg_interfsel);
c20aebb9	468
ce3ab650 TL	469	/* Wait for musb to get oriented. Otherwise we can get babble */
	470	usleep_range(200000, 250000);
	471
62d472d8 TL	472	glue->is_runtime_suspended = 0;
62d472d8 TL	473
c20aebb9 FB	474	return 0;
	475	}
	476
68d9f95d	477	/* I2C and SPI PHYs need to be suspended before the glue layer */
62d472d8	478	static int omap2430_suspend(struct device *dev)
68d9f95d TL	479	{
	480	struct omap2430_glue *glue = dev_get_drvdata(dev);
	481	struct musb *musb = glue_to_musb(glue);
	482
	483	phy_power_off(musb->phy);
	484	phy_exit(musb->phy);
	485	glue->phy_suspended = 1;
	486
	487	return 0;
	488	}
	489
	490	/* Glue layer needs to be suspended after musb_suspend() */
	491	static int omap2430_suspend_late(struct device *dev)
62d472d8 TL	492	{
	493	struct omap2430_glue *glue = dev_get_drvdata(dev);
	494
	495	if (glue->is_runtime_suspended)
	496	return 0;
	497
	498	glue->needs_resume = 1;
	499
	500	return omap2430_runtime_suspend(dev);
	501	}
	502
68d9f95d	503	static int omap2430_resume_early(struct device *dev)
62d472d8 TL	504	{
	505	struct omap2430_glue *glue = dev_get_drvdata(dev);
	506
	507	if (!glue->needs_resume)
	508	return 0;
	509
	510	glue->needs_resume = 0;
	511
	512	return omap2430_runtime_resume(dev);
	513	}
	514
68d9f95d TL	515	static int omap2430_resume(struct device *dev)
	516	{
	517	struct omap2430_glue *glue = dev_get_drvdata(dev);
	518	struct musb *musb = glue_to_musb(glue);
	519
	520	phy_init(musb->phy);
	521	phy_power_on(musb->phy);
	522	glue->phy_suspended = 0;
	523
	524	return 0;
	525	}
	526
c0927fea	527	static const struct dev_pm_ops omap2430_pm_ops = {
7acc6197 HH	528	.runtime_suspend = omap2430_runtime_suspend,
7acc6197 HH	529	.runtime_resume = omap2430_runtime_resume,
62d472d8	530	.suspend = omap2430_suspend,
68d9f95d TL	531	.suspend_late = omap2430_suspend_late,
68d9f95d TL	532	.resume_early = omap2430_resume_early,
62d472d8	533	.resume = omap2430_resume,
c20aebb9 FB	534	};
	535
	536	#define DEV_PM_OPS (&omap2430_pm_ops)
	537	#else
	538	#define DEV_PM_OPS NULL
	539	#endif
	540
00a0b1d5 KVA	541	#ifdef CONFIG_OF
	542	static const struct of_device_id omap2430_id_table[] = {
	543	{
	544	.compatible = "ti,omap4-musb"
	545	},
	546	{
	547	.compatible = "ti,omap3-musb"
	548	},
	549	{},
	550	};
	551	MODULE_DEVICE_TABLE(of, omap2430_id_table);
	552	#endif
	553
dc09886b	554	static struct platform_driver omap2430_driver = {
e9e8c85e	555	.probe = omap2430_probe,
7690417d	556	.remove = omap2430_remove,
dc09886b FB	557	.driver = {
dc09886b FB	558	.name = "musb-omap2430",
c20aebb9	559	.pm = DEV_PM_OPS,
00a0b1d5	560	.of_match_table = of_match_ptr(omap2430_id_table),
dc09886b FB	561	},
	562	};
	563
aec373c1 TL	564	module_platform_driver(omap2430_driver);
aec373c1 TL	565
dc09886b FB	566	MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
	567	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
	568	MODULE_LICENSE("GPL v2");