[mirror_ubuntu-artful-kernel.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 <mach/hardware.h>
#include <mach/usb-control.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);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	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   = dev->resource[0].end - dev->resource[0].start + 1;

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		dev_err(&dev->dev, "request_mem_region failed\n");
		retval = -EBUSY;
		goto err_put;
	}

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

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

	s3c2410_start_hc(dev, hcd);

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		dev_err(&dev->dev, "ioremap failed\n");
		retval = -ENOMEM;
		goto err_ioremap;
	}

	ohci_hcd_init(hcd_to_ohci(hcd));

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

	return 0;

 err_ioremap:
	s3c2410_stop_hc(dev);
	iounmap(hcd->regs);
	clk_put(usb_clk);

 err_clk:
	clk_put(clk);

 err_mem:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

 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;

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

	if ((ret = ohci_run (ohci)) < 0) {
		err ("can't start %s", 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,
	.hub_irq_enable =	ohci_rhsc_enable,
#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;
}

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,
	/*.suspend	= ohci_hcd_s3c2410_drv_suspend, */
	/*.resume	= ohci_hcd_s3c2410_drv_resume, */
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "s3c2410-ohci",
	},
};

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>
d052d1be	24
a09e64fb RK	25	#include <mach/hardware.h>
a09e64fb RK	26	#include <mach/usb-control.h>
3eb0c5f4 BD	27
	28	#define valid_port(idx) ((idx) == 1 \|\| (idx) == 2)
	29
	30	/* clock device associated with the hcd */
	31
	32	static struct clk *clk;
3799c401	33	static struct clk *usb_clk;
3eb0c5f4 BD	34
	35	/* forward definitions */
	36
	37	static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc);
	38
	39	/* conversion functions */
	40
f096e043	41	static struct s3c2410_hcd_info to_s3c2410_info(struct usb_hcd hcd)
3eb0c5f4 BD	42	{
	43	return hcd->self.controller->platform_data;
	44	}
	45
	46	static void s3c2410_start_hc(struct platform_device dev, struct usb_hcd hcd)
	47	{
	48	struct s3c2410_hcd_info *info = dev->dev.platform_data;
	49
	50	dev_dbg(&dev->dev, "s3c2410_start_hc:\n");
3799c401 BD	51
	52	clk_enable(usb_clk);
	53	mdelay(2); /* let the bus clock stabilise */
	54
3eb0c5f4 BD	55	clk_enable(clk);
	56
	57	if (info != NULL) {
	58	info->hcd = hcd;
	59	info->report_oc = s3c2410_hcd_oc;
	60
	61	if (info->enable_oc != NULL) {
	62	(info->enable_oc)(info, 1);
	63	}
	64	}
	65	}
	66
	67	static void s3c2410_stop_hc(struct platform_device *dev)
	68	{
	69	struct s3c2410_hcd_info *info = dev->dev.platform_data;
	70
	71	dev_dbg(&dev->dev, "s3c2410_stop_hc:\n");
	72
	73	if (info != NULL) {
	74	info->report_oc = NULL;
	75	info->hcd = NULL;
	76
	77	if (info->enable_oc != NULL) {
	78	(info->enable_oc)(info, 0);
	79	}
	80	}
	81
	82	clk_disable(clk);
3799c401	83	clk_disable(usb_clk);
3eb0c5f4 BD	84	}
	85
	86	/* ohci_s3c2410_hub_status_data
	87	*
	88	* update the status data from the hub with anything that
	89	* has been detected by our system
	90	*/
	91
	92	static int
	93	ohci_s3c2410_hub_status_data (struct usb_hcd hcd, char buf)
	94	{
	95	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
	96	struct s3c2410_hcd_port *port;
	97	int orig;
	98	int portno;
	99
	100	orig = ohci_hub_status_data (hcd, buf);
	101
	102	if (info == NULL)
	103	return orig;
	104
	105	port = &info->port[0];
	106
	107	/* mark any changed port as changed */
	108
	109	for (portno = 0; portno < 2; port++, portno++) {
	110	if (port->oc_changed == 1 &&
	111	port->flags & S3C_HCDFLG_USED) {
	112	dev_dbg(hcd->self.controller,
	113	"oc change on port %d\n", portno);
	114
	115	if (orig < 1)
	116	orig = 1;
	117
	118	buf[0] \|= 1<<(portno+1);
	119	}
	120	}
	121
	122	return orig;
	123	}
	124
	125	/* s3c2410_usb_set_power
	126	*
	127	* configure the power on a port, by calling the platform device
	128	* routine registered with the platform device
	129	*/
	130
	131	static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info,
	132	int port, int to)
	133	{
	134	if (info == NULL)
	135	return;
	136
	137	if (info->power_control != NULL) {
	138	info->port[port-1].power = to;
ba44e7c4	139	(info->power_control)(port-1, to);
3eb0c5f4 BD	140	}
	141	}
	142
	143	/* ohci_s3c2410_hub_control
	144	*
	145	* look at control requests to the hub, and see if we need
	146	* to take any action or over-ride the results from the
	147	* request.
	148	*/
	149
	150	static int ohci_s3c2410_hub_control (
	151	struct usb_hcd *hcd,
	152	u16 typeReq,
	153	u16 wValue,
	154	u16 wIndex,
	155	char *buf,
	156	u16 wLength)
	157	{
	158	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);
	159	struct usb_hub_descriptor *desc;
	160	int ret = -EINVAL;
	161	u32 data = (u32 )buf;
	162
	163	dev_dbg(hcd->self.controller,
	164	"s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
	165	hcd, typeReq, wValue, wIndex, buf, wLength);
	166
7f927fcc	167	/* if we are only an humble host without any special capabilities
3eb0c5f4 BD	168	* process the request straight away and exit */
	169
	170	if (info == NULL) {
	171	ret = ohci_hub_control(hcd, typeReq, wValue,
	172	wIndex, buf, wLength);
	173	goto out;
	174	}
	175
	176	/* check the request to see if it needs handling */
	177
	178	switch (typeReq) {
	179	case SetPortFeature:
	180	if (wValue == USB_PORT_FEAT_POWER) {
	181	dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
	182	s3c2410_usb_set_power(info, wIndex, 1);
	183	goto out;
	184	}
	185	break;
	186
	187	case ClearPortFeature:
	188	switch (wValue) {
	189	case USB_PORT_FEAT_C_OVER_CURRENT:
	190	dev_dbg(hcd->self.controller,
	191	"ClearPortFeature: C_OVER_CURRENT\n");
	192
	193	if (valid_port(wIndex)) {
	194	info->port[wIndex-1].oc_changed = 0;
	195	info->port[wIndex-1].oc_status = 0;
	196	}
	197
	198	goto out;
	199
	200	case USB_PORT_FEAT_OVER_CURRENT:
	201	dev_dbg(hcd->self.controller,
	202	"ClearPortFeature: OVER_CURRENT\n");
	203
	204	if (valid_port(wIndex)) {
	205	info->port[wIndex-1].oc_status = 0;
	206	}
	207
	208	goto out;
	209
	210	case USB_PORT_FEAT_POWER:
	211	dev_dbg(hcd->self.controller,
	212	"ClearPortFeature: POWER\n");
	213
	214	if (valid_port(wIndex)) {
	215	s3c2410_usb_set_power(info, wIndex, 0);
	216	return 0;
	217	}
	218	}
	219	break;
	220	}
	221
	222	ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
	223	if (ret)
	224	goto out;
	225
	226	switch (typeReq) {
	227	case GetHubDescriptor:
	228
	229	/* update the hub's descriptor */
	230
	231	desc = (struct usb_hub_descriptor *)buf;
232
233	if (info->power_control == NULL)
234	return ret;
235
236	dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
237	desc->wHubCharacteristics);
238
239	/* remove the old configurations for power-switching, and
240	* over-current protection, and insert our new configuration
241	*/
242
243	desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
244	desc->wHubCharacteristics \|= cpu_to_le16(0x0001);
245
246	if (info->enable_oc) {
247	desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM);
248	desc->wHubCharacteristics \|= cpu_to_le16(0x0008\|0x0001);
249	}
250
251	dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
252	desc->wHubCharacteristics);
253
254	return ret;
255
256	case GetPortStatus:
257	/* check port status */
258
259	dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
260
261	if (valid_port(wIndex)) {
262	if (info->port[wIndex-1].oc_changed) {
263	*data \|= cpu_to_le32(RH_PS_OCIC);
264	}
265
266	if (info->port[wIndex-1].oc_status) {
267	*data \|= cpu_to_le32(RH_PS_POCI);
268	}
269	}
270	}
271
272	out:
273	return ret;
274	}
275
276	/* s3c2410_hcd_oc
277	*
278	* handle an over-current report
279	*/
280
281	static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
282	{
283	struct s3c2410_hcd_port *port;
284	struct usb_hcd *hcd;
285	unsigned long flags;
286	int portno;
287
288	if (info == NULL)
289	return;
290
291	port = &info->port[0];
292	hcd = info->hcd;
293
294	local_irq_save(flags);
295
296	for (portno = 0; portno < 2; port++, portno++) {
297	if (port_oc & (1<<portno) &&
298	port->flags & S3C_HCDFLG_USED) {
299	port->oc_status = 1;
300	port->oc_changed = 1;
301
302	/* ok, once over-current is detected,
303	the port needs to be powered down */
304	s3c2410_usb_set_power(info, portno+1, 0);
305	}
306	}
307
308	local_irq_restore(flags);
309	}
310
311	/* may be called without controller electrically present */
312	/* may be called with controller, bus, and devices active */
313
314	/*
315	* usb_hcd_s3c2410_remove - shutdown processing for HCD
316	* @dev: USB Host Controller being removed
317	* Context: !in_interrupt()
318	*
319	* Reverses the effect of usb_hcd_3c2410_probe(), first invoking
320	* the HCD's stop() method. It is always called from a thread
321	* context, normally "rmmod", "apmd", or something similar.
322	*
323	*/
324
f096e043 BD	325	static void
f096e043 BD	326	usb_hcd_s3c2410_remove (struct usb_hcd hcd, struct platform_device dev)
3eb0c5f4 BD	327	{
	328	usb_remove_hcd(hcd);
	329	s3c2410_stop_hc(dev);
	330	iounmap(hcd->regs);
	331	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	332	usb_put_hcd(hcd);
	333	}
	334
	335	/**
	336	* usb_hcd_s3c2410_probe - initialize S3C2410-based HCDs
	337	* Context: !in_interrupt()
	338	*
	339	* Allocates basic resources for this USB host controller, and
	340	* then invokes the start() method for the HCD associated with it
	341	* through the hotplug entry's driver_data.
	342	*
	343	*/
f096e043 BD	344	static int usb_hcd_s3c2410_probe (const struct hc_driver *driver,
f096e043 BD	345	struct platform_device *dev)
3eb0c5f4 BD	346	{
	347	struct usb_hcd *hcd = NULL;
	348	int retval;
	349
3eb0c5f4	350	s3c2410_usb_set_power(dev->dev.platform_data, 1, 1);
ba44e7c4	351	s3c2410_usb_set_power(dev->dev.platform_data, 2, 1);
3eb0c5f4 BD	352
	353	hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx");
	354	if (hcd == NULL)
	355	return -ENOMEM;
	356
	357	hcd->rsrc_start = dev->resource[0].start;
	358	hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
	359
	360	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
898eb71c	361	dev_err(&dev->dev, "request_mem_region failed\n");
3eb0c5f4	362	retval = -EBUSY;
3799c401	363	goto err_put;
3eb0c5f4 BD	364	}
3eb0c5f4 BD	365
3799c401	366	clk = clk_get(&dev->dev, "usb-host");
3eb0c5f4 BD	367	if (IS_ERR(clk)) {
	368	dev_err(&dev->dev, "cannot get usb-host clock\n");
	369	retval = -ENOENT;
3799c401 BD	370	goto err_mem;
	371	}
	372
b2a8e097	373	usb_clk = clk_get(&dev->dev, "usb-bus-host");
3799c401 BD	374	if (IS_ERR(usb_clk)) {
	375	dev_err(&dev->dev, "cannot get usb-host clock\n");
	376	retval = -ENOENT;
	377	goto err_clk;
3eb0c5f4 BD	378	}
3eb0c5f4 BD	379
3eb0c5f4 BD	380	s3c2410_start_hc(dev, hcd);
	381
	382	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	383	if (!hcd->regs) {
	384	dev_err(&dev->dev, "ioremap failed\n");
	385	retval = -ENOMEM;
3799c401	386	goto err_ioremap;
3eb0c5f4 BD	387	}
	388
	389	ohci_hcd_init(hcd_to_ohci(hcd));
	390
d54b5caa	391	retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);
3eb0c5f4	392	if (retval != 0)
3799c401	393	goto err_ioremap;
3eb0c5f4 BD	394
	395	return 0;
	396
3799c401	397	err_ioremap:
3eb0c5f4 BD	398	s3c2410_stop_hc(dev);
3eb0c5f4 BD	399	iounmap(hcd->regs);
3799c401 BD	400	clk_put(usb_clk);
	401
	402	err_clk:
3eb0c5f4 BD	403	clk_put(clk);
3eb0c5f4 BD	404
3799c401	405	err_mem:
3eb0c5f4 BD	406	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
3eb0c5f4 BD	407
3799c401	408	err_put:
3eb0c5f4 BD	409	usb_put_hcd(hcd);
	410	return retval;
	411	}
	412
	413	/-------------------------------------------------------------------------/
	414
	415	static int
	416	ohci_s3c2410_start (struct usb_hcd *hcd)
	417	{
	418	struct ohci_hcd *ohci = hcd_to_ohci (hcd);
	419	int ret;
	420
	421	if ((ret = ohci_init(ohci)) < 0)
	422	return ret;
	423
	424	if ((ret = ohci_run (ohci)) < 0) {
	425	err ("can't start %s", hcd->self.bus_name);
	426	ohci_stop (hcd);
	427	return ret;
	428	}
	429
	430	return 0;
	431	}
	432
	433
	434	static const struct hc_driver ohci_s3c2410_hc_driver = {
	435	.description = hcd_name,
	436	.product_desc = "S3C24XX OHCI",
	437	.hcd_priv_size = sizeof(struct ohci_hcd),
	438
	439	/*
	440	* generic hardware linkage
	441	*/
	442	.irq = ohci_irq,
	443	.flags = HCD_USB11 \| HCD_MEMORY,
	444
	445	/*
	446	* basic lifecycle operations
	447	*/
	448	.start = ohci_s3c2410_start,
	449	.stop = ohci_stop,
dd9048af	450	.shutdown = ohci_shutdown,
3eb0c5f4 BD	451
	452	/*
	453	* managing i/o requests and associated device resources
	454	*/
	455	.urb_enqueue = ohci_urb_enqueue,
	456	.urb_dequeue = ohci_urb_dequeue,
	457	.endpoint_disable = ohci_endpoint_disable,
	458
	459	/*
	460	* scheduling support
	461	*/
	462	.get_frame_number = ohci_get_frame,
	463
	464	/*
	465	* root hub support
	466	*/
	467	.hub_status_data = ohci_s3c2410_hub_status_data,
	468	.hub_control = ohci_s3c2410_hub_control,
09ca8adb	469	.hub_irq_enable = ohci_rhsc_enable,
8ad7fe16	470	#ifdef CONFIG_PM
0c0382e3 AS	471	.bus_suspend = ohci_bus_suspend,
0c0382e3 AS	472	.bus_resume = ohci_bus_resume,
3eb0c5f4	473	#endif
9293677a	474	.start_port_reset = ohci_start_port_reset,
3eb0c5f4 BD	475	};
	476
	477	/* device driver */
	478
3ae5eaec	479	static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev)
3eb0c5f4	480	{
3eb0c5f4 BD	481	return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev);
	482	}
	483
3ae5eaec	484	static int ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev)
3eb0c5f4	485	{
3ae5eaec	486	struct usb_hcd *hcd = platform_get_drvdata(pdev);
3eb0c5f4 BD	487
	488	usb_hcd_s3c2410_remove(hcd, pdev);
	489	return 0;
	490	}
	491
3ae5eaec	492	static struct platform_driver ohci_hcd_s3c2410_driver = {
3eb0c5f4 BD	493	.probe = ohci_hcd_s3c2410_drv_probe,
3eb0c5f4 BD	494	.remove = ohci_hcd_s3c2410_drv_remove,
dd9048af	495	.shutdown = usb_hcd_platform_shutdown,
3eb0c5f4 BD	496	/.suspend = ohci_hcd_s3c2410_drv_suspend, /
3eb0c5f4 BD	497	/.resume = ohci_hcd_s3c2410_drv_resume, /
3ae5eaec RK	498	.driver = {
	499	.owner = THIS_MODULE,
	500	.name = "s3c2410-ohci",
	501	},
3eb0c5f4 BD	502	};
3eb0c5f4 BD	503
f4fce61d	504	MODULE_ALIAS("platform:s3c2410-ohci");