[deliverable/linux.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/clk.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_data/usb-ohci-s3c2410.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>

#include "ohci.h"


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

/* clock device associated with the hcd */


#define DRIVER_DESC "OHCI S3C2410 driver"

static const char hcd_name[] = "ohci-s3c2410";

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 dev_get_platdata(hcd->self.controller);
}

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

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

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

	clk_prepare_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_get_platdata(&dev->dev);

	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_unprepare(clk);
	clk_disable_unprepare(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(
			HUB_CHAR_INDV_PORT_LPSM);

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

		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;
	struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev);
	int retval;

	s3c2410_usb_set_power(info, 1, 1);
	s3c2410_usb_set_power(info, 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);

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

	device_wakeup_enable(hcd->self.controller);
	return 0;

 err_ioremap:
	s3c2410_stop_hc(dev);

 err_put:
	usb_put_hcd(hcd);
	return retval;
}

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

static struct hc_driver __read_mostly ohci_s3c2410_hc_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 platform_device *pdev = to_platform_device(dev);
	bool do_wakeup = device_may_wakeup(dev);
	int rc = 0;

	rc = ohci_suspend(hcd, do_wakeup);
	if (rc)
		return rc;

	s3c2410_stop_hc(pdev);

	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		= {
		.name	= "s3c2410-ohci",
		.pm	= &ohci_hcd_s3c2410_pm_ops,
	},
};

static int __init ohci_s3c2410_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	ohci_init_driver(&ohci_s3c2410_hc_driver, NULL);

	/*
	 * The Samsung HW has some unusual quirks, which require
	 * Sumsung-specific workarounds. We override certain hc_driver
	 * functions here to achieve that. We explicitly do not enhance
	 * ohci_driver_overrides to allow this more easily, since this
	 * is an unusual case, and we don't want to encourage others to
	 * override these functions by making it too easy.
	 */

	ohci_s3c2410_hc_driver.hub_status_data	= ohci_s3c2410_hub_status_data;
	ohci_s3c2410_hc_driver.hub_control	= ohci_s3c2410_hub_control;

	return platform_driver_register(&ohci_hcd_s3c2410_driver);
}
module_init(ohci_s3c2410_init);

static void __exit ohci_s3c2410_cleanup(void)
{
	platform_driver_unregister(&ohci_hcd_s3c2410_driver);
}
module_exit(ohci_s3c2410_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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
f8ce2547	22	#include <linux/clk.h>
f23b71f3 MG	23	#include <linux/io.h>
	24	#include <linux/kernel.h>
	25	#include <linux/module.h>
	26	#include <linux/platform_device.h>
436d42c6	27	#include <linux/platform_data/usb-ohci-s3c2410.h>
f23b71f3 MG	28	#include <linux/usb.h>
	29	#include <linux/usb/hcd.h>
	30
	31	#include "ohci.h"
	32
3eb0c5f4 BD	33
	34	#define valid_port(idx) ((idx) == 1 \|\| (idx) == 2)
	35
	36	/* clock device associated with the hcd */
	37
f23b71f3 MG	38
	39	#define DRIVER_DESC "OHCI S3C2410 driver"
	40
	41	static const char hcd_name[] = "ohci-s3c2410";
	42
3eb0c5f4	43	static struct clk *clk;
3799c401	44	static struct clk *usb_clk;
3eb0c5f4 BD	45
	46	/* forward definitions */
	47
	48	static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc);
	49
	50	/* conversion functions */
	51
f096e043	52	static struct s3c2410_hcd_info to_s3c2410_info(struct usb_hcd hcd)
3eb0c5f4	53	{
d4f09e28	54	return dev_get_platdata(hcd->self.controller);
3eb0c5f4 BD	55	}
	56
	57	static void s3c2410_start_hc(struct platform_device dev, struct usb_hcd hcd)
	58	{
d4f09e28	59	struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev);
3eb0c5f4 BD	60
3eb0c5f4 BD	61	dev_dbg(&dev->dev, "s3c2410_start_hc:\n");
3799c401	62
d0127f6f	63	clk_prepare_enable(usb_clk);
3799c401 BD	64	mdelay(2); /* let the bus clock stabilise */
3799c401 BD	65
d0127f6f	66	clk_prepare_enable(clk);
3eb0c5f4 BD	67
	68	if (info != NULL) {
	69	info->hcd = hcd;
	70	info->report_oc = s3c2410_hcd_oc;
	71
7af85a85	72	if (info->enable_oc != NULL)
3eb0c5f4	73	(info->enable_oc)(info, 1);
3eb0c5f4 BD	74	}
	75	}
	76
	77	static void s3c2410_stop_hc(struct platform_device *dev)
	78	{
d4f09e28	79	struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev);
3eb0c5f4 BD	80
	81	dev_dbg(&dev->dev, "s3c2410_stop_hc:\n");
	82
	83	if (info != NULL) {
	84	info->report_oc = NULL;
	85	info->hcd = NULL;
	86
7af85a85	87	if (info->enable_oc != NULL)
3eb0c5f4	88	(info->enable_oc)(info, 0);
3eb0c5f4 BD	89	}
3eb0c5f4 BD	90
d0127f6f TF	91	clk_disable_unprepare(clk);
d0127f6f TF	92	clk_disable_unprepare(usb_clk);
3eb0c5f4 BD	93	}
	94
	95	/* ohci_s3c2410_hub_status_data
	96	*
	97	* update the status data from the hub with anything that
	98	* has been detected by our system
	99	*/
	100
	101	static int
7af85a85	102	ohci_s3c2410_hub_status_data(struct usb_hcd hcd, char buf)
3eb0c5f4 BD	103	{
	104	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
	105	struct s3c2410_hcd_port *port;
	106	int orig;
	107	int portno;
	108
42b59eba	109	orig = ohci_hub_status_data(hcd, buf);
3eb0c5f4 BD	110
	111	if (info == NULL)
	112	return orig;
	113
	114	port = &info->port[0];
	115
	116	/* mark any changed port as changed */
	117
	118	for (portno = 0; portno < 2; port++, portno++) {
	119	if (port->oc_changed == 1 &&
	120	port->flags & S3C_HCDFLG_USED) {
	121	dev_dbg(hcd->self.controller,
	122	"oc change on port %d\n", portno);
	123
	124	if (orig < 1)
	125	orig = 1;
	126
	127	buf[0] \|= 1<<(portno+1);
	128	}
	129	}
	130
	131	return orig;
	132	}
	133
	134	/* s3c2410_usb_set_power
	135	*
	136	* configure the power on a port, by calling the platform device
	137	* routine registered with the platform device
	138	*/
	139
	140	static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info,
	141	int port, int to)
	142	{
	143	if (info == NULL)
	144	return;
	145
	146	if (info->power_control != NULL) {
	147	info->port[port-1].power = to;
ba44e7c4	148	(info->power_control)(port-1, to);
3eb0c5f4 BD	149	}
	150	}
	151
	152	/* ohci_s3c2410_hub_control
	153	*
	154	* look at control requests to the hub, and see if we need
	155	* to take any action or over-ride the results from the
	156	* request.
	157	*/
	158
7af85a85	159	static int ohci_s3c2410_hub_control(
3eb0c5f4 BD	160	struct usb_hcd *hcd,
	161	u16 typeReq,
	162	u16 wValue,
	163	u16 wIndex,
	164	char *buf,
	165	u16 wLength)
	166	{
	167	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
	168	struct usb_hub_descriptor *desc;
	169	int ret = -EINVAL;
	170	u32 data = (u32 )buf;
	171
	172	dev_dbg(hcd->self.controller,
	173	"s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
	174	hcd, typeReq, wValue, wIndex, buf, wLength);
	175
7f927fcc	176	/* if we are only an humble host without any special capabilities
3eb0c5f4 BD	177	* process the request straight away and exit */
	178
	179	if (info == NULL) {
42b59eba	180	ret = ohci_hub_control(hcd, typeReq, wValue,
3eb0c5f4 BD	181	wIndex, buf, wLength);
	182	goto out;
	183	}
	184
	185	/* check the request to see if it needs handling */
	186
	187	switch (typeReq) {
	188	case SetPortFeature:
	189	if (wValue == USB_PORT_FEAT_POWER) {
	190	dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
	191	s3c2410_usb_set_power(info, wIndex, 1);
	192	goto out;
	193	}
	194	break;
	195
	196	case ClearPortFeature:
	197	switch (wValue) {
	198	case USB_PORT_FEAT_C_OVER_CURRENT:
	199	dev_dbg(hcd->self.controller,
	200	"ClearPortFeature: C_OVER_CURRENT\n");
	201
	202	if (valid_port(wIndex)) {
	203	info->port[wIndex-1].oc_changed = 0;
	204	info->port[wIndex-1].oc_status = 0;
	205	}
	206
	207	goto out;
	208
	209	case USB_PORT_FEAT_OVER_CURRENT:
	210	dev_dbg(hcd->self.controller,
	211	"ClearPortFeature: OVER_CURRENT\n");
	212
7af85a85	213	if (valid_port(wIndex))
3eb0c5f4	214	info->port[wIndex-1].oc_status = 0;
3eb0c5f4 BD	215
	216	goto out;
	217
	218	case USB_PORT_FEAT_POWER:
	219	dev_dbg(hcd->self.controller,
	220	"ClearPortFeature: POWER\n");
	221
	222	if (valid_port(wIndex)) {
	223	s3c2410_usb_set_power(info, wIndex, 0);
	224	return 0;
	225	}
	226	}
	227	break;
	228	}
	229
42b59eba	230	ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
3eb0c5f4 BD	231	if (ret)
	232	goto out;
	233
	234	switch (typeReq) {
	235	case GetHubDescriptor:
	236
	237	/* update the hub's descriptor */
	238
	239	desc = (struct usb_hub_descriptor *)buf;
	240
	241	if (info->power_control == NULL)
	242	return ret;
	243
	244	dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
	245	desc->wHubCharacteristics);
	246
	247	/* remove the old configurations for power-switching, and
	248	* over-current protection, and insert our new configuration
	249	*/
	250
	251	desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
dd709764 SS	252	desc->wHubCharacteristics \|= cpu_to_le16(
dd709764 SS	253	HUB_CHAR_INDV_PORT_LPSM);
3eb0c5f4 BD	254
3eb0c5f4 BD	255	if (info->enable_oc) {
7af85a85 JH	256	desc->wHubCharacteristics &= ~cpu_to_le16(
	257	HUB_CHAR_OCPM);
	258	desc->wHubCharacteristics \|= cpu_to_le16(
dd709764	259	HUB_CHAR_INDV_PORT_OCPM);
3eb0c5f4 BD	260	}
	261
	262	dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
	263	desc->wHubCharacteristics);
	264
	265	return ret;
	266
	267	case GetPortStatus:
	268	/* check port status */
	269
	270	dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
	271
	272	if (valid_port(wIndex)) {
7af85a85	273	if (info->port[wIndex-1].oc_changed)
3eb0c5f4	274	*data \|= cpu_to_le32(RH_PS_OCIC);
3eb0c5f4	275
7af85a85	276	if (info->port[wIndex-1].oc_status)
3eb0c5f4	277	*data \|= cpu_to_le32(RH_PS_POCI);
3eb0c5f4 BD	278	}
	279	}
	280
	281	out:
	282	return ret;
	283	}
	284
	285	/* s3c2410_hcd_oc
	286	*
	287	* handle an over-current report
	288	*/
	289
	290	static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
	291	{
	292	struct s3c2410_hcd_port *port;
	293	struct usb_hcd *hcd;
	294	unsigned long flags;
	295	int portno;
	296
	297	if (info == NULL)
	298	return;
	299
	300	port = &info->port[0];
	301	hcd = info->hcd;
	302
	303	local_irq_save(flags);
	304
	305	for (portno = 0; portno < 2; port++, portno++) {
	306	if (port_oc & (1<<portno) &&
	307	port->flags & S3C_HCDFLG_USED) {
	308	port->oc_status = 1;
	309	port->oc_changed = 1;
	310
	311	/* ok, once over-current is detected,
	312	the port needs to be powered down */
	313	s3c2410_usb_set_power(info, portno+1, 0);
	314	}
	315	}
	316
	317	local_irq_restore(flags);
	318	}
	319
	320	/* may be called without controller electrically present */
	321	/* may be called with controller, bus, and devices active */
	322
	323	/*
	324	* usb_hcd_s3c2410_remove - shutdown processing for HCD
	325	* @dev: USB Host Controller being removed
	326	* Context: !in_interrupt()
	327	*
	328	* Reverses the effect of usb_hcd_3c2410_probe(), first invoking
	329	* the HCD's stop() method. It is always called from a thread
	330	* context, normally "rmmod", "apmd", or something similar.
	331	*
	332	*/
	333
f096e043	334	static void
7af85a85	335	usb_hcd_s3c2410_remove(struct usb_hcd hcd, struct platform_device dev)
3eb0c5f4 BD	336	{
	337	usb_remove_hcd(hcd);
	338	s3c2410_stop_hc(dev);
3eb0c5f4 BD	339	usb_put_hcd(hcd);
	340	}
	341
	342	/**
	343	* usb_hcd_s3c2410_probe - initialize S3C2410-based HCDs
	344	* Context: !in_interrupt()
	345	*
	346	* Allocates basic resources for this USB host controller, and
	347	* then invokes the start() method for the HCD associated with it
	348	* through the hotplug entry's driver_data.
	349	*
	350	*/
7af85a85	351	static int usb_hcd_s3c2410_probe(const struct hc_driver *driver,
f096e043	352	struct platform_device *dev)
3eb0c5f4 BD	353	{
3eb0c5f4 BD	354	struct usb_hcd *hcd = NULL;
d4f09e28	355	struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev);
3eb0c5f4 BD	356	int retval;
3eb0c5f4 BD	357
d4f09e28 JH	358	s3c2410_usb_set_power(info, 1, 1);
d4f09e28 JH	359	s3c2410_usb_set_power(info, 2, 1);
3eb0c5f4 BD	360
	361	hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx");
	362	if (hcd == NULL)
	363	return -ENOMEM;
	364
	365	hcd->rsrc_start = dev->resource[0].start;
3c86c07b	366	hcd->rsrc_len = resource_size(&dev->resource[0]);
3eb0c5f4	367
148e1134 TR	368	hcd->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]);
	369	if (IS_ERR(hcd->regs)) {
	370	retval = PTR_ERR(hcd->regs);
3799c401	371	goto err_put;
3eb0c5f4 BD	372	}
3eb0c5f4 BD	373
801f0063	374	clk = devm_clk_get(&dev->dev, "usb-host");
3eb0c5f4 BD	375	if (IS_ERR(clk)) {
3eb0c5f4 BD	376	dev_err(&dev->dev, "cannot get usb-host clock\n");
69248d42	377	retval = PTR_ERR(clk);
801f0063	378	goto err_put;
3799c401 BD	379	}
3799c401 BD	380
801f0063	381	usb_clk = devm_clk_get(&dev->dev, "usb-bus-host");
3799c401	382	if (IS_ERR(usb_clk)) {
2dfa319a	383	dev_err(&dev->dev, "cannot get usb-bus-host clock\n");
69248d42	384	retval = PTR_ERR(usb_clk);
801f0063	385	goto err_put;
3eb0c5f4 BD	386	}
3eb0c5f4 BD	387
3eb0c5f4 BD	388	s3c2410_start_hc(dev, hcd);
3eb0c5f4 BD	389
b5dd18d8	390	retval = usb_add_hcd(hcd, dev->resource[1].start, 0);
3eb0c5f4	391	if (retval != 0)
3799c401	392	goto err_ioremap;
3eb0c5f4	393
3c9740a1	394	device_wakeup_enable(hcd->self.controller);
3eb0c5f4 BD	395	return 0;
3eb0c5f4 BD	396
3799c401	397	err_ioremap:
3eb0c5f4	398	s3c2410_stop_hc(dev);
3eb0c5f4	399
3799c401	400	err_put:
3eb0c5f4 BD	401	usb_put_hcd(hcd);
	402	return retval;
	403	}
	404
	405	/-------------------------------------------------------------------------/
	406
f23b71f3	407	static struct hc_driver __read_mostly ohci_s3c2410_hc_driver;
3eb0c5f4	408
41ac7b3a	409	static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev)
3eb0c5f4	410	{
3eb0c5f4 BD	411	return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev);
	412	}
	413
fb4e98ab	414	static int ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev)
3eb0c5f4	415	{
3ae5eaec	416	struct usb_hcd *hcd = platform_get_drvdata(pdev);
3eb0c5f4 BD	417
	418	usb_hcd_s3c2410_remove(hcd, pdev);
	419	return 0;
	420	}
	421
b870defe JH	422	#ifdef CONFIG_PM
	423	static int ohci_hcd_s3c2410_drv_suspend(struct device *dev)
	424	{
	425	struct usb_hcd *hcd = dev_get_drvdata(dev);
b870defe	426	struct platform_device *pdev = to_platform_device(dev);
0ded36d9	427	bool do_wakeup = device_may_wakeup(dev);
b870defe JH	428	int rc = 0;
b870defe JH	429
0ded36d9 MG	430	rc = ohci_suspend(hcd, do_wakeup);
	431	if (rc)
	432	return rc;
b870defe JH	433
b870defe JH	434	s3c2410_stop_hc(pdev);
b870defe JH	435
	436	return rc;
	437	}
	438
	439	static int ohci_hcd_s3c2410_drv_resume(struct device *dev)
	440	{
	441	struct usb_hcd *hcd = dev_get_drvdata(dev);
	442	struct platform_device *pdev = to_platform_device(dev);
	443
	444	s3c2410_start_hc(pdev, hcd);
	445
cfa49b4b	446	ohci_resume(hcd, false);
b870defe JH	447
	448	return 0;
	449	}
	450	#else
	451	#define ohci_hcd_s3c2410_drv_suspend NULL
	452	#define ohci_hcd_s3c2410_drv_resume NULL
	453	#endif
	454
	455	static const struct dev_pm_ops ohci_hcd_s3c2410_pm_ops = {
	456	.suspend = ohci_hcd_s3c2410_drv_suspend,
	457	.resume = ohci_hcd_s3c2410_drv_resume,
	458	};
	459
3ae5eaec	460	static struct platform_driver ohci_hcd_s3c2410_driver = {
3eb0c5f4	461	.probe = ohci_hcd_s3c2410_drv_probe,
7690417d	462	.remove = ohci_hcd_s3c2410_drv_remove,
dd9048af	463	.shutdown = usb_hcd_platform_shutdown,
3ae5eaec	464	.driver = {
3ae5eaec	465	.name = "s3c2410-ohci",
b870defe	466	.pm = &ohci_hcd_s3c2410_pm_ops,
3ae5eaec	467	},
3eb0c5f4 BD	468	};
3eb0c5f4 BD	469
f23b71f3 MG	470	static int __init ohci_s3c2410_init(void)
	471	{
	472	if (usb_disabled())
	473	return -ENODEV;
	474
	475	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	476	ohci_init_driver(&ohci_s3c2410_hc_driver, NULL);
	477
	478	/*
	479	* The Samsung HW has some unusual quirks, which require
	480	* Sumsung-specific workarounds. We override certain hc_driver
	481	* functions here to achieve that. We explicitly do not enhance
	482	* ohci_driver_overrides to allow this more easily, since this
	483	* is an unusual case, and we don't want to encourage others to
	484	* override these functions by making it too easy.
	485	*/
	486
f23b71f3 MG	487	ohci_s3c2410_hc_driver.hub_status_data = ohci_s3c2410_hub_status_data;
	488	ohci_s3c2410_hc_driver.hub_control = ohci_s3c2410_hub_control;
	489
	490	return platform_driver_register(&ohci_hcd_s3c2410_driver);
	491	}
	492	module_init(ohci_s3c2410_init);
	493
	494	static void __exit ohci_s3c2410_cleanup(void)
	495	{
	496	platform_driver_unregister(&ohci_hcd_s3c2410_driver);
	497	}
	498	module_exit(ohci_s3c2410_cleanup);
	499
	500	MODULE_DESCRIPTION(DRIVER_DESC);
	501	MODULE_LICENSE("GPL");
f4fce61d	502	MODULE_ALIAS("platform:s3c2410-ohci");