[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / host / ohci-s3c2410.c

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 * (C) Copyright 2002 Hewlett-Packard Company
 *
 * USB Bus Glue for Samsung S3C2410
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
 * Based on fragments of previous driver by Russell King et al.
 *
 * Modified for S3C2410 from ohci-sa1111.c, ohci-omap.c and ohci-lh7a40.c
 *	by Ben Dooks, <ben@simtec.co.uk>
 *	Copyright (C) 2004 Simtec Electronics
 *
 * Thanks to basprog@mail.ru for updates to newer kernels
 *
 * This file is licenced under the GPL.
*/

#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/platform_data/usb-ohci-s3c2410.h>

#define valid_port(idx) ((idx) == 1 || (idx) == 2)

/* clock device associated with the hcd */

static struct clk *clk;
static struct clk *usb_clk;

/* forward definitions */

static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc);

/* conversion functions */

static struct s3c2410_hcd_info *to_s3c2410_info(struct usb_hcd *hcd)
{
	return hcd->self.controller->platform_data;
}

static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd)
{
	struct s3c2410_hcd_info *info = dev->dev.platform_data;

	dev_dbg(&dev->dev, "s3c2410_start_hc:\n");

	clk_enable(usb_clk);
	mdelay(2);			/* let the bus clock stabilise */

	clk_enable(clk);

	if (info != NULL) {
		info->hcd	= hcd;
		info->report_oc = s3c2410_hcd_oc;

		if (info->enable_oc != NULL)
			(info->enable_oc)(info, 1);
	}
}

static void s3c2410_stop_hc(struct platform_device *dev)
{
	struct s3c2410_hcd_info *info = dev->dev.platform_data;

	dev_dbg(&dev->dev, "s3c2410_stop_hc:\n");

	if (info != NULL) {
		info->report_oc = NULL;
		info->hcd	= NULL;

		if (info->enable_oc != NULL)
			(info->enable_oc)(info, 0);
	}

	clk_disable(clk);
	clk_disable(usb_clk);
}

/* ohci_s3c2410_hub_status_data
 *
 * update the status data from the hub with anything that
 * has been detected by our system
*/

static int
ohci_s3c2410_hub_status_data(struct usb_hcd *hcd, char *buf)
{
	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
	struct s3c2410_hcd_port *port;
	int orig;
	int portno;

	orig  = ohci_hub_status_data(hcd, buf);

	if (info == NULL)
		return orig;

	port = &info->port[0];

	/* mark any changed port as changed */

	for (portno = 0; portno < 2; port++, portno++) {
		if (port->oc_changed == 1 &&
		    port->flags & S3C_HCDFLG_USED) {
			dev_dbg(hcd->self.controller,
				"oc change on port %d\n", portno);

			if (orig < 1)
				orig = 1;

			buf[0] |= 1<<(portno+1);
		}
	}

	return orig;
}

/* s3c2410_usb_set_power
 *
 * configure the power on a port, by calling the platform device
 * routine registered with the platform device
*/

static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info,
				  int port, int to)
{
	if (info == NULL)
		return;

	if (info->power_control != NULL) {
		info->port[port-1].power = to;
		(info->power_control)(port-1, to);
	}
}

/* ohci_s3c2410_hub_control
 *
 * look at control requests to the hub, and see if we need
 * to take any action or over-ride the results from the
 * request.
*/

static int ohci_s3c2410_hub_control(
	struct usb_hcd	*hcd,
	u16		typeReq,
	u16		wValue,
	u16		wIndex,
	char		*buf,
	u16		wLength)
{
	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
	struct usb_hub_descriptor *desc;
	int ret = -EINVAL;
	u32 *data = (u32 *)buf;

	dev_dbg(hcd->self.controller,
		"s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
		hcd, typeReq, wValue, wIndex, buf, wLength);

	/* if we are only an humble host without any special capabilities
	 * process the request straight away and exit */

	if (info == NULL) {
		ret = ohci_hub_control(hcd, typeReq, wValue,
				       wIndex, buf, wLength);
		goto out;
	}

	/* check the request to see if it needs handling */

	switch (typeReq) {
	case SetPortFeature:
		if (wValue == USB_PORT_FEAT_POWER) {
			dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
			s3c2410_usb_set_power(info, wIndex, 1);
			goto out;
		}
		break;

	case ClearPortFeature:
		switch (wValue) {
		case USB_PORT_FEAT_C_OVER_CURRENT:
			dev_dbg(hcd->self.controller,
				"ClearPortFeature: C_OVER_CURRENT\n");

			if (valid_port(wIndex)) {
				info->port[wIndex-1].oc_changed = 0;
				info->port[wIndex-1].oc_status = 0;
			}

			goto out;

		case USB_PORT_FEAT_OVER_CURRENT:
			dev_dbg(hcd->self.controller,
				"ClearPortFeature: OVER_CURRENT\n");

			if (valid_port(wIndex))
				info->port[wIndex-1].oc_status = 0;

			goto out;

		case USB_PORT_FEAT_POWER:
			dev_dbg(hcd->self.controller,
				"ClearPortFeature: POWER\n");

			if (valid_port(wIndex)) {
				s3c2410_usb_set_power(info, wIndex, 0);
				return 0;
			}
		}
		break;
	}

	ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
	if (ret)
		goto out;

	switch (typeReq) {
	case GetHubDescriptor:

		/* update the hub's descriptor */

		desc = (struct usb_hub_descriptor *)buf;

		if (info->power_control == NULL)
			return ret;

		dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
			desc->wHubCharacteristics);

		/* remove the old configurations for power-switching, and
		 * over-current protection, and insert our new configuration
		 */

		desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
		desc->wHubCharacteristics |= cpu_to_le16(0x0001);

		if (info->enable_oc) {
			desc->wHubCharacteristics &= ~cpu_to_le16(
				HUB_CHAR_OCPM);
			desc->wHubCharacteristics |=  cpu_to_le16(
				0x0008 |
				0x0001);
		}

		dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
			desc->wHubCharacteristics);

		return ret;

	case GetPortStatus:
		/* check port status */

		dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);

		if (valid_port(wIndex)) {
			if (info->port[wIndex-1].oc_changed)
				*data |= cpu_to_le32(RH_PS_OCIC);

			if (info->port[wIndex-1].oc_status)
				*data |= cpu_to_le32(RH_PS_POCI);
		}
	}

 out:
	return ret;
}

/* s3c2410_hcd_oc
 *
 * handle an over-current report
*/

static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
{
	struct s3c2410_hcd_port *port;
	struct usb_hcd *hcd;
	unsigned long flags;
	int portno;

	if (info == NULL)
		return;

	port = &info->port[0];
	hcd = info->hcd;

	local_irq_save(flags);

	for (portno = 0; portno < 2; port++, portno++) {
		if (port_oc & (1<<portno) &&
		    port->flags & S3C_HCDFLG_USED) {
			port->oc_status = 1;
			port->oc_changed = 1;

			/* ok, once over-current is detected,
			   the port needs to be powered down */
			s3c2410_usb_set_power(info, portno+1, 0);
		}
	}

	local_irq_restore(flags);
}

/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */

/*
 * usb_hcd_s3c2410_remove - shutdown processing for HCD
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_3c2410_probe(), first invoking
 * the HCD's stop() method.  It is always called from a thread
 * context, normally "rmmod", "apmd", or something similar.
 *
*/

static void
usb_hcd_s3c2410_remove(struct usb_hcd *hcd, struct platform_device *dev)
{
	usb_remove_hcd(hcd);
	s3c2410_stop_hc(dev);
	usb_put_hcd(hcd);
}

/**
 * usb_hcd_s3c2410_probe - initialize S3C2410-based HCDs
 * Context: !in_interrupt()
 *
 * Allocates basic resources for this USB host controller, and
 * then invokes the start() method for the HCD associated with it
 * through the hotplug entry's driver_data.
 *
 */
static int usb_hcd_s3c2410_probe(const struct hc_driver *driver,
				  struct platform_device *dev)
{
	struct usb_hcd *hcd = NULL;
	int retval;

	s3c2410_usb_set_power(dev->dev.platform_data, 1, 1);
	s3c2410_usb_set_power(dev->dev.platform_data, 2, 1);

	hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx");
	if (hcd == NULL)
		return -ENOMEM;

	hcd->rsrc_start = dev->resource[0].start;
	hcd->rsrc_len	= resource_size(&dev->resource[0]);

	hcd->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]);
	if (IS_ERR(hcd->regs)) {
		retval = PTR_ERR(hcd->regs);
		goto err_put;
	}

	clk = devm_clk_get(&dev->dev, "usb-host");
	if (IS_ERR(clk)) {
		dev_err(&dev->dev, "cannot get usb-host clock\n");
		retval = PTR_ERR(clk);
		goto err_put;
	}

	usb_clk = devm_clk_get(&dev->dev, "usb-bus-host");
	if (IS_ERR(usb_clk)) {
		dev_err(&dev->dev, "cannot get usb-bus-host clock\n");
		retval = PTR_ERR(usb_clk);
		goto err_put;
	}

	s3c2410_start_hc(dev, hcd);

	ohci_hcd_init(hcd_to_ohci(hcd));

	retval = usb_add_hcd(hcd, dev->resource[1].start, 0);
	if (retval != 0)
		goto err_ioremap;

	return 0;

 err_ioremap:
	s3c2410_stop_hc(dev);

 err_put:
	usb_put_hcd(hcd);
	return retval;
}

/*-------------------------------------------------------------------------*/

static int
ohci_s3c2410_start(struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
	int ret;

	ret = ohci_init(ohci);
	if (ret < 0)
		return ret;

	ret = ohci_run(ohci);
	if (ret < 0) {
		dev_err(hcd->self.controller, "can't start %s\n",
			hcd->self.bus_name);
		ohci_stop(hcd);
		return ret;
	}

	return 0;
}


static const struct hc_driver ohci_s3c2410_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"S3C24XX OHCI",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq =			ohci_irq,
	.flags =		HCD_USB11 | HCD_MEMORY,

	/*
	 * basic lifecycle operations
	 */
	.start =		ohci_s3c2410_start,
	.stop =			ohci_stop,
	.shutdown =		ohci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue =		ohci_urb_enqueue,
	.urb_dequeue =		ohci_urb_dequeue,
	.endpoint_disable =	ohci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number =	ohci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data =	ohci_s3c2410_hub_status_data,
	.hub_control =		ohci_s3c2410_hub_control,
#ifdef	CONFIG_PM
	.bus_suspend =		ohci_bus_suspend,
	.bus_resume =		ohci_bus_resume,
#endif
	.start_port_reset =	ohci_start_port_reset,
};

/* device driver */

static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev)
{
	return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev);
}

static int ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_hcd_s3c2410_remove(hcd, pdev);
	return 0;
}

#ifdef CONFIG_PM
static int ohci_hcd_s3c2410_drv_suspend(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	struct platform_device *pdev = to_platform_device(dev);
	unsigned long flags;
	int rc = 0;

	/*
	 * Root hub was already suspended. Disable irq emission and
	 * mark HW unaccessible, bail out if RH has been resumed. Use
	 * the spinlock to properly synchronize with possible pending
	 * RH suspend or resume activity.
	 */
	spin_lock_irqsave(&ohci->lock, flags);
	if (ohci->rh_state != OHCI_RH_SUSPENDED) {
		rc = -EINVAL;
		goto bail;
	}

	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

	s3c2410_stop_hc(pdev);
bail:
	spin_unlock_irqrestore(&ohci->lock, flags);

	return rc;
}

static int ohci_hcd_s3c2410_drv_resume(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct platform_device *pdev = to_platform_device(dev);

	s3c2410_start_hc(pdev, hcd);

	ohci_resume(hcd, false);

	return 0;
}
#else
#define ohci_hcd_s3c2410_drv_suspend	NULL
#define ohci_hcd_s3c2410_drv_resume	NULL
#endif

static const struct dev_pm_ops ohci_hcd_s3c2410_pm_ops = {
	.suspend	= ohci_hcd_s3c2410_drv_suspend,
	.resume		= ohci_hcd_s3c2410_drv_resume,
};

static struct platform_driver ohci_hcd_s3c2410_driver = {
	.probe		= ohci_hcd_s3c2410_drv_probe,
	.remove		= ohci_hcd_s3c2410_drv_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "s3c2410-ohci",
		.pm	= &ohci_hcd_s3c2410_pm_ops,
	},
};

MODULE_ALIAS("platform:s3c2410-ohci");
Commit	Line	Data
3eb0c5f4 BD	1	/*
	2	* OHCI HCD (Host Controller Driver) for USB.
	3	*
	4	* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
	5	* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
	6	* (C) Copyright 2002 Hewlett-Packard Company
	7	*
	8	* USB Bus Glue for Samsung S3C2410
	9	*
	10	* Written by Christopher Hoover <ch@hpl.hp.com>
ac310bb5	11	* Based on fragments of previous driver by Russell King et al.
3eb0c5f4 BD	12	*
	13	* Modified for S3C2410 from ohci-sa1111.c, ohci-omap.c and ohci-lh7a40.c
	14	* by Ben Dooks, <ben@simtec.co.uk>
	15	* Copyright (C) 2004 Simtec Electronics
	16	*
	17	* Thanks to basprog@mail.ru for updates to newer kernels
	18	*
	19	* This file is licenced under the GPL.
	20	*/
	21
d052d1be	22	#include <linux/platform_device.h>
f8ce2547	23	#include <linux/clk.h>
436d42c6	24	#include <linux/platform_data/usb-ohci-s3c2410.h>
3eb0c5f4 BD	25
	26	#define valid_port(idx) ((idx) == 1 \|\| (idx) == 2)
	27
	28	/* clock device associated with the hcd */
	29
	30	static struct clk *clk;
3799c401	31	static struct clk *usb_clk;
3eb0c5f4 BD	32
	33	/* forward definitions */
	34
	35	static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc);
	36
	37	/* conversion functions */
	38
f096e043	39	static struct s3c2410_hcd_info to_s3c2410_info(struct usb_hcd hcd)
3eb0c5f4 BD	40	{
	41	return hcd->self.controller->platform_data;
	42	}
	43
	44	static void s3c2410_start_hc(struct platform_device dev, struct usb_hcd hcd)
	45	{
	46	struct s3c2410_hcd_info *info = dev->dev.platform_data;
	47
	48	dev_dbg(&dev->dev, "s3c2410_start_hc:\n");
3799c401 BD	49
	50	clk_enable(usb_clk);
	51	mdelay(2); /* let the bus clock stabilise */
	52
3eb0c5f4 BD	53	clk_enable(clk);
	54
	55	if (info != NULL) {
	56	info->hcd = hcd;
	57	info->report_oc = s3c2410_hcd_oc;
	58
7af85a85	59	if (info->enable_oc != NULL)
3eb0c5f4	60	(info->enable_oc)(info, 1);
3eb0c5f4 BD	61	}
	62	}
	63
	64	static void s3c2410_stop_hc(struct platform_device *dev)
	65	{
	66	struct s3c2410_hcd_info *info = dev->dev.platform_data;
	67
	68	dev_dbg(&dev->dev, "s3c2410_stop_hc:\n");
	69
	70	if (info != NULL) {
	71	info->report_oc = NULL;
	72	info->hcd = NULL;
	73
7af85a85	74	if (info->enable_oc != NULL)
3eb0c5f4	75	(info->enable_oc)(info, 0);
3eb0c5f4 BD	76	}
	77
	78	clk_disable(clk);
3799c401	79	clk_disable(usb_clk);
3eb0c5f4 BD	80	}
	81
	82	/* ohci_s3c2410_hub_status_data
	83	*
	84	* update the status data from the hub with anything that
	85	* has been detected by our system
	86	*/
	87
	88	static int
7af85a85	89	ohci_s3c2410_hub_status_data(struct usb_hcd hcd, char buf)
3eb0c5f4 BD	90	{
	91	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
	92	struct s3c2410_hcd_port *port;
	93	int orig;
	94	int portno;
	95
7af85a85	96	orig = ohci_hub_status_data(hcd, buf);
3eb0c5f4 BD	97
	98	if (info == NULL)
	99	return orig;
	100
	101	port = &info->port[0];
	102
	103	/* mark any changed port as changed */
	104
	105	for (portno = 0; portno < 2; port++, portno++) {
	106	if (port->oc_changed == 1 &&
	107	port->flags & S3C_HCDFLG_USED) {
	108	dev_dbg(hcd->self.controller,
	109	"oc change on port %d\n", portno);
	110
	111	if (orig < 1)
	112	orig = 1;
	113
	114	buf[0] \|= 1<<(portno+1);
	115	}
	116	}
	117
	118	return orig;
	119	}
	120
	121	/* s3c2410_usb_set_power
	122	*
	123	* configure the power on a port, by calling the platform device
	124	* routine registered with the platform device
	125	*/
	126
	127	static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info,
	128	int port, int to)
	129	{
	130	if (info == NULL)
	131	return;
	132
	133	if (info->power_control != NULL) {
	134	info->port[port-1].power = to;
ba44e7c4	135	(info->power_control)(port-1, to);
3eb0c5f4 BD	136	}
	137	}
	138
	139	/* ohci_s3c2410_hub_control
	140	*
	141	* look at control requests to the hub, and see if we need
	142	* to take any action or over-ride the results from the
	143	* request.
	144	*/
	145
7af85a85	146	static int ohci_s3c2410_hub_control(
3eb0c5f4 BD	147	struct usb_hcd *hcd,
	148	u16 typeReq,
	149	u16 wValue,
	150	u16 wIndex,
	151	char *buf,
	152	u16 wLength)
	153	{
	154	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
	155	struct usb_hub_descriptor *desc;
	156	int ret = -EINVAL;
	157	u32 data = (u32 )buf;
	158
	159	dev_dbg(hcd->self.controller,
	160	"s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
	161	hcd, typeReq, wValue, wIndex, buf, wLength);
	162
7f927fcc	163	/* if we are only an humble host without any special capabilities
3eb0c5f4 BD	164	* process the request straight away and exit */
	165
	166	if (info == NULL) {
	167	ret = ohci_hub_control(hcd, typeReq, wValue,
	168	wIndex, buf, wLength);
	169	goto out;
	170	}
	171
	172	/* check the request to see if it needs handling */
	173
	174	switch (typeReq) {
	175	case SetPortFeature:
	176	if (wValue == USB_PORT_FEAT_POWER) {
	177	dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
	178	s3c2410_usb_set_power(info, wIndex, 1);
	179	goto out;
	180	}
	181	break;
	182
	183	case ClearPortFeature:
	184	switch (wValue) {
	185	case USB_PORT_FEAT_C_OVER_CURRENT:
	186	dev_dbg(hcd->self.controller,
	187	"ClearPortFeature: C_OVER_CURRENT\n");
	188
	189	if (valid_port(wIndex)) {
	190	info->port[wIndex-1].oc_changed = 0;
	191	info->port[wIndex-1].oc_status = 0;
	192	}
	193
	194	goto out;
	195
	196	case USB_PORT_FEAT_OVER_CURRENT:
	197	dev_dbg(hcd->self.controller,
	198	"ClearPortFeature: OVER_CURRENT\n");
	199
7af85a85	200	if (valid_port(wIndex))
3eb0c5f4	201	info->port[wIndex-1].oc_status = 0;
3eb0c5f4 BD	202
	203	goto out;
	204
	205	case USB_PORT_FEAT_POWER:
	206	dev_dbg(hcd->self.controller,
	207	"ClearPortFeature: POWER\n");
	208
	209	if (valid_port(wIndex)) {
	210	s3c2410_usb_set_power(info, wIndex, 0);
	211	return 0;
	212	}
	213	}
	214	break;
	215	}
	216
	217	ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
	218	if (ret)
	219	goto out;
	220
	221	switch (typeReq) {
	222	case GetHubDescriptor:
	223
	224	/* update the hub's descriptor */
	225
	226	desc = (struct usb_hub_descriptor *)buf;
	227
	228	if (info->power_control == NULL)
	229	return ret;
	230
	231	dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
	232	desc->wHubCharacteristics);
	233
	234	/* remove the old configurations for power-switching, and
	235	* over-current protection, and insert our new configuration
	236	*/
	237
	238	desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
	239	desc->wHubCharacteristics \|= cpu_to_le16(0x0001);
	240
	241	if (info->enable_oc) {
7af85a85 JH	242	desc->wHubCharacteristics &= ~cpu_to_le16(
	243	HUB_CHAR_OCPM);
	244	desc->wHubCharacteristics \|= cpu_to_le16(
	245	0x0008 \|
	246	0x0001);
3eb0c5f4 BD	247	}
	248
	249	dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
	250	desc->wHubCharacteristics);
	251
	252	return ret;
	253
	254	case GetPortStatus:
	255	/* check port status */
	256
	257	dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
	258
	259	if (valid_port(wIndex)) {
7af85a85	260	if (info->port[wIndex-1].oc_changed)
3eb0c5f4	261	*data \|= cpu_to_le32(RH_PS_OCIC);
3eb0c5f4	262
7af85a85	263	if (info->port[wIndex-1].oc_status)
3eb0c5f4	264	*data \|= cpu_to_le32(RH_PS_POCI);
3eb0c5f4 BD	265	}
	266	}
	267
	268	out:
	269	return ret;
	270	}
	271
	272	/* s3c2410_hcd_oc
	273	*
	274	* handle an over-current report
	275	*/
	276
	277	static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
	278	{
	279	struct s3c2410_hcd_port *port;
	280	struct usb_hcd *hcd;
	281	unsigned long flags;
	282	int portno;
	283
	284	if (info == NULL)
	285	return;
	286
	287	port = &info->port[0];
	288	hcd = info->hcd;
	289
	290	local_irq_save(flags);
	291
	292	for (portno = 0; portno < 2; port++, portno++) {
	293	if (port_oc & (1<<portno) &&
	294	port->flags & S3C_HCDFLG_USED) {
	295	port->oc_status = 1;
	296	port->oc_changed = 1;
	297
	298	/* ok, once over-current is detected,
	299	the port needs to be powered down */
	300	s3c2410_usb_set_power(info, portno+1, 0);
	301	}
	302	}
	303
	304	local_irq_restore(flags);
	305	}
	306
	307	/* may be called without controller electrically present */
	308	/* may be called with controller, bus, and devices active */
	309
	310	/*
	311	* usb_hcd_s3c2410_remove - shutdown processing for HCD
	312	* @dev: USB Host Controller being removed
	313	* Context: !in_interrupt()
	314	*
	315	* Reverses the effect of usb_hcd_3c2410_probe(), first invoking
	316	* the HCD's stop() method. It is always called from a thread
	317	* context, normally "rmmod", "apmd", or something similar.
	318	*
	319	*/
	320
f096e043	321	static void
7af85a85	322	usb_hcd_s3c2410_remove(struct usb_hcd hcd, struct platform_device dev)
3eb0c5f4 BD	323	{
	324	usb_remove_hcd(hcd);
	325	s3c2410_stop_hc(dev);
3eb0c5f4 BD	326	usb_put_hcd(hcd);
	327	}
	328
	329	/**
	330	* usb_hcd_s3c2410_probe - initialize S3C2410-based HCDs
	331	* Context: !in_interrupt()
	332	*
	333	* Allocates basic resources for this USB host controller, and
	334	* then invokes the start() method for the HCD associated with it
	335	* through the hotplug entry's driver_data.
	336	*
	337	*/
7af85a85	338	static int usb_hcd_s3c2410_probe(const struct hc_driver *driver,
f096e043	339	struct platform_device *dev)
3eb0c5f4 BD	340	{
	341	struct usb_hcd *hcd = NULL;
	342	int retval;
	343
3eb0c5f4	344	s3c2410_usb_set_power(dev->dev.platform_data, 1, 1);
ba44e7c4	345	s3c2410_usb_set_power(dev->dev.platform_data, 2, 1);
3eb0c5f4 BD	346
	347	hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx");
	348	if (hcd == NULL)
	349	return -ENOMEM;
	350
	351	hcd->rsrc_start = dev->resource[0].start;
3c86c07b	352	hcd->rsrc_len = resource_size(&dev->resource[0]);
3eb0c5f4	353
148e1134 TR	354	hcd->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]);
	355	if (IS_ERR(hcd->regs)) {
	356	retval = PTR_ERR(hcd->regs);
3799c401	357	goto err_put;
3eb0c5f4 BD	358	}
3eb0c5f4 BD	359
801f0063	360	clk = devm_clk_get(&dev->dev, "usb-host");
3eb0c5f4 BD	361	if (IS_ERR(clk)) {
3eb0c5f4 BD	362	dev_err(&dev->dev, "cannot get usb-host clock\n");
69248d42	363	retval = PTR_ERR(clk);
801f0063	364	goto err_put;
3799c401 BD	365	}
3799c401 BD	366
801f0063	367	usb_clk = devm_clk_get(&dev->dev, "usb-bus-host");
3799c401	368	if (IS_ERR(usb_clk)) {
2dfa319a	369	dev_err(&dev->dev, "cannot get usb-bus-host clock\n");
69248d42	370	retval = PTR_ERR(usb_clk);
801f0063	371	goto err_put;
3eb0c5f4 BD	372	}
3eb0c5f4 BD	373
3eb0c5f4 BD	374	s3c2410_start_hc(dev, hcd);
3eb0c5f4 BD	375
3eb0c5f4 BD	376	ohci_hcd_init(hcd_to_ohci(hcd));
3eb0c5f4 BD	377
b5dd18d8	378	retval = usb_add_hcd(hcd, dev->resource[1].start, 0);
3eb0c5f4	379	if (retval != 0)
3799c401	380	goto err_ioremap;
3eb0c5f4 BD	381
	382	return 0;
	383
3799c401	384	err_ioremap:
3eb0c5f4	385	s3c2410_stop_hc(dev);
3eb0c5f4	386
3799c401	387	err_put:
3eb0c5f4 BD	388	usb_put_hcd(hcd);
	389	return retval;
	390	}
	391
	392	/-------------------------------------------------------------------------/
	393
	394	static int
7af85a85	395	ohci_s3c2410_start(struct usb_hcd *hcd)
3eb0c5f4	396	{
7af85a85	397	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
3eb0c5f4 BD	398	int ret;
3eb0c5f4 BD	399
7af85a85 JH	400	ret = ohci_init(ohci);
7af85a85 JH	401	if (ret < 0)
3eb0c5f4 BD	402	return ret;
3eb0c5f4 BD	403
7af85a85 JH	404	ret = ohci_run(ohci);
7af85a85 JH	405	if (ret < 0) {
1041ac11 GKH	406	dev_err(hcd->self.controller, "can't start %s\n",
1041ac11 GKH	407	hcd->self.bus_name);
7af85a85	408	ohci_stop(hcd);
3eb0c5f4 BD	409	return ret;
	410	}
	411
	412	return 0;
	413	}
	414
	415
	416	static const struct hc_driver ohci_s3c2410_hc_driver = {
	417	.description = hcd_name,
	418	.product_desc = "S3C24XX OHCI",
	419	.hcd_priv_size = sizeof(struct ohci_hcd),
	420
	421	/*
	422	* generic hardware linkage
	423	*/
	424	.irq = ohci_irq,
	425	.flags = HCD_USB11 \| HCD_MEMORY,
	426
	427	/*
	428	* basic lifecycle operations
	429	*/
	430	.start = ohci_s3c2410_start,
	431	.stop = ohci_stop,
dd9048af	432	.shutdown = ohci_shutdown,
3eb0c5f4 BD	433
	434	/*
	435	* managing i/o requests and associated device resources
	436	*/
	437	.urb_enqueue = ohci_urb_enqueue,
	438	.urb_dequeue = ohci_urb_dequeue,
	439	.endpoint_disable = ohci_endpoint_disable,
	440
	441	/*
	442	* scheduling support
	443	*/
	444	.get_frame_number = ohci_get_frame,
	445
	446	/*
	447	* root hub support
	448	*/
	449	.hub_status_data = ohci_s3c2410_hub_status_data,
	450	.hub_control = ohci_s3c2410_hub_control,
8ad7fe16	451	#ifdef CONFIG_PM
0c0382e3 AS	452	.bus_suspend = ohci_bus_suspend,
0c0382e3 AS	453	.bus_resume = ohci_bus_resume,
3eb0c5f4	454	#endif
9293677a	455	.start_port_reset = ohci_start_port_reset,
3eb0c5f4 BD	456	};
	457
	458	/* device driver */
	459
41ac7b3a	460	static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev)
3eb0c5f4	461	{
3eb0c5f4 BD	462	return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev);
	463	}
	464
fb4e98ab	465	static int ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev)
3eb0c5f4	466	{
3ae5eaec	467	struct usb_hcd *hcd = platform_get_drvdata(pdev);
3eb0c5f4 BD	468
	469	usb_hcd_s3c2410_remove(hcd, pdev);
	470	return 0;
	471	}
	472
b870defe JH	473	#ifdef CONFIG_PM
	474	static int ohci_hcd_s3c2410_drv_suspend(struct device *dev)
	475	{
	476	struct usb_hcd *hcd = dev_get_drvdata(dev);
	477	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	478	struct platform_device *pdev = to_platform_device(dev);
	479	unsigned long flags;
	480	int rc = 0;
	481
	482	/*
	483	* Root hub was already suspended. Disable irq emission and
	484	* mark HW unaccessible, bail out if RH has been resumed. Use
	485	* the spinlock to properly synchronize with possible pending
	486	* RH suspend or resume activity.
	487	*/
	488	spin_lock_irqsave(&ohci->lock, flags);
	489	if (ohci->rh_state != OHCI_RH_SUSPENDED) {
	490	rc = -EINVAL;
	491	goto bail;
	492	}
	493
	494	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
	495
	496	s3c2410_stop_hc(pdev);
	497	bail:
	498	spin_unlock_irqrestore(&ohci->lock, flags);
	499
	500	return rc;
	501	}
	502
	503	static int ohci_hcd_s3c2410_drv_resume(struct device *dev)
	504	{
	505	struct usb_hcd *hcd = dev_get_drvdata(dev);
	506	struct platform_device *pdev = to_platform_device(dev);
	507
	508	s3c2410_start_hc(pdev, hcd);
	509
cfa49b4b	510	ohci_resume(hcd, false);
b870defe JH	511
	512	return 0;
	513	}
	514	#else
	515	#define ohci_hcd_s3c2410_drv_suspend NULL
	516	#define ohci_hcd_s3c2410_drv_resume NULL
	517	#endif
	518
	519	static const struct dev_pm_ops ohci_hcd_s3c2410_pm_ops = {
	520	.suspend = ohci_hcd_s3c2410_drv_suspend,
	521	.resume = ohci_hcd_s3c2410_drv_resume,
	522	};
	523
3ae5eaec	524	static struct platform_driver ohci_hcd_s3c2410_driver = {
3eb0c5f4	525	.probe = ohci_hcd_s3c2410_drv_probe,
7690417d	526	.remove = ohci_hcd_s3c2410_drv_remove,
dd9048af	527	.shutdown = usb_hcd_platform_shutdown,
3ae5eaec RK	528	.driver = {
	529	.owner = THIS_MODULE,
	530	.name = "s3c2410-ohci",
b870defe	531	.pm = &ohci_hcd_s3c2410_pm_ops,
3ae5eaec	532	},
3eb0c5f4 BD	533	};
3eb0c5f4 BD	534
f4fce61d	535	MODULE_ALIAS("platform:s3c2410-ohci");