[mirror_ubuntu-artful-kernel.git] / drivers / usb / host / ohci-pxa27x.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
 *
 * Bus Glue for pxa27x
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
 * Based on fragments of previous driver by Russell King et al.
 *
 * Modified for LH7A404 from ohci-sa1111.c
 *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
 *
 * Modified for pxa27x from ohci-lh7a404.c
 *  by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
 *
 * This file is licenced under the GPL.
 */

#include <linux/device.h>
#include <linux/signal.h>
#include <linux/platform_device.h>

#include <asm/mach-types.h>
#include <asm/hardware.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/ohci.h>

#define PXA_UHC_MAX_PORTNUM    3

#define UHCRHPS(x)              __REG2( 0x4C000050, (x)<<2 )

/*
  PMM_NPS_MODE -- PMM Non-power switching mode
      Ports are powered continuously.

  PMM_GLOBAL_MODE -- PMM global switching mode
      All ports are powered at the same time.

  PMM_PERPORT_MODE -- PMM per port switching mode
      Ports are powered individually.
 */
static int pxa27x_ohci_select_pmm( int mode )
{
	switch ( mode ) {
	case PMM_NPS_MODE:
		UHCRHDA |= RH_A_NPS;
		break; 
	case PMM_GLOBAL_MODE:
		UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
		break;
	case PMM_PERPORT_MODE:
		UHCRHDA &= ~(RH_A_NPS);
		UHCRHDA |= RH_A_PSM;

		/* Set port power control mask bits, only 3 ports. */
		UHCRHDB |= (0x7<<17);
		break;
	default:
		printk( KERN_ERR
			"Invalid mode %d, set to non-power switch mode.\n", 
			mode );

		UHCRHDA |= RH_A_NPS;
	}

	return 0;
}

extern int usb_disabled(void);

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

static int pxa27x_start_hc(struct device *dev)
{
	int retval = 0;
	struct pxaohci_platform_data *inf;

	inf = dev->platform_data;

	pxa_set_cken(CKEN10_USBHOST, 1);

	UHCHR |= UHCHR_FHR;
	udelay(11);
	UHCHR &= ~UHCHR_FHR;

	UHCHR |= UHCHR_FSBIR;
	while (UHCHR & UHCHR_FSBIR)
		cpu_relax();

	if (inf->init)
		retval = inf->init(dev);

	if (retval < 0)
		return retval;

	UHCHR &= ~UHCHR_SSE;

	UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);

	/* Clear any OTG Pin Hold */
	if (PSSR & PSSR_OTGPH)
		PSSR |= PSSR_OTGPH;

	return 0;
}

static void pxa27x_stop_hc(struct device *dev)
{
	struct pxaohci_platform_data *inf;

	inf = dev->platform_data;

	if (inf->exit)
		inf->exit(dev);

	UHCHR |= UHCHR_FHR;
	udelay(11);
	UHCHR &= ~UHCHR_FHR;

	UHCCOMS |= 1;
	udelay(10);

	pxa_set_cken(CKEN10_USBHOST, 0);
}


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

/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */


/**
 * usb_hcd_pxa27x_probe - initialize pxa27x-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.
 *
 */
int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev)
{
	int retval;
	struct usb_hcd *hcd;
	struct pxaohci_platform_data *inf;

	inf = pdev->dev.platform_data;

	if (!inf)
		return -ENODEV;

	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
		pr_debug ("resource[1] is not IORESOURCE_IRQ");
		return -ENOMEM;
	}

	hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
	if (!hcd)
		return -ENOMEM;
	hcd->rsrc_start = pdev->resource[0].start;
	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		pr_debug("request_mem_region failed");
		retval = -EBUSY;
		goto err1;
	}

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		pr_debug("ioremap failed");
		retval = -ENOMEM;
		goto err2;
	}

	if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) {
		pr_debug("pxa27x_start_hc failed");
		goto err3;
	}

	/* Select Power Management Mode */
	pxa27x_ohci_select_pmm(inf->port_mode);

	if (inf->power_budget)
		hcd->power_budget = inf->power_budget;

	ohci_hcd_init(hcd_to_ohci(hcd));

	retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);
	if (retval == 0)
		return retval;

	pxa27x_stop_hc(&pdev->dev);
 err3:
	iounmap(hcd->regs);
 err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err1:
	usb_put_hcd(hcd);
	return retval;
}


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

/**
 * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
 * the HCD's stop() method.  It is always called from a thread
 * context, normally "rmmod", "apmd", or something similar.
 *
 */
void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
{
	usb_remove_hcd(hcd);
	pxa27x_stop_hc(&pdev->dev);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
}

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

static int __devinit
ohci_pxa27x_start (struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
	int		ret;

	ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);

	/* The value of NDP in roothub_a is incorrect on this hardware */
	ohci->num_ports = 3;

	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_pxa27x_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"PXA27x OHCI",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

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

	/*
	 * basic lifecycle operations
	 */
	.start =		ohci_pxa27x_start,
	.stop =			ohci_stop,

	/*
	 * 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_hub_status_data,
	.hub_control =		ohci_hub_control,
#ifdef  CONFIG_PM
	.bus_suspend =		ohci_bus_suspend,
	.bus_resume =		ohci_bus_resume,
#endif
	.start_port_reset =	ohci_start_port_reset,
};

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

static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
{
	pr_debug ("In ohci_hcd_pxa27x_drv_probe");

	if (usb_disabled())
		return -ENODEV;

	return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
}

static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_hcd_pxa27x_remove(hcd, pdev);
	platform_set_drvdata(pdev, NULL);
	return 0;
}

#ifdef	CONFIG_PM
static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);

	if (time_before(jiffies, ohci->next_statechange))
		msleep(5);
	ohci->next_statechange = jiffies;

	pxa27x_stop_hc(&pdev->dev);
	hcd->state = HC_STATE_SUSPENDED;
	pdev->dev.power.power_state = PMSG_SUSPEND;

	return 0;
}

static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	int status;

	if (time_before(jiffies, ohci->next_statechange))
		msleep(5);
	ohci->next_statechange = jiffies;

	if ((status = pxa27x_start_hc(&pdev->dev)) < 0)
		return status;

	pdev->dev.power.power_state = PMSG_ON;
	usb_hcd_resume_root_hub(hcd);

	return 0;
}
#endif


static struct platform_driver ohci_hcd_pxa27x_driver = {
	.probe		= ohci_hcd_pxa27x_drv_probe,
	.remove		= ohci_hcd_pxa27x_drv_remove,
#ifdef CONFIG_PM
	.suspend	= ohci_hcd_pxa27x_drv_suspend, 
	.resume		= ohci_hcd_pxa27x_drv_resume,
#endif
	.driver		= {
		.name	= "pxa27x-ohci",
	},
};

static int __init ohci_hcd_pxa27x_init (void)
{
	pr_debug (DRIVER_INFO " (pxa27x)");
	pr_debug ("block sizes: ed %d td %d\n",
		sizeof (struct ed), sizeof (struct td));

	return platform_driver_register(&ohci_hcd_pxa27x_driver);
}

static void __exit ohci_hcd_pxa27x_cleanup (void)
{
	platform_driver_unregister(&ohci_hcd_pxa27x_driver);
}

module_init (ohci_hcd_pxa27x_init);
module_exit (ohci_hcd_pxa27x_cleanup);
Commit	Line	Data
1da177e4 LT	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	* Bus Glue for pxa27x
	9	*
	10	* Written by Christopher Hoover <ch@hpl.hp.com>
	11	* Based on fragments of previous driver by Russell King et al.
	12	*
	13	* Modified for LH7A404 from ohci-sa1111.c
	14	* by Durgesh Pattamatta <pattamattad@sharpsec.com>
	15	*
	16	* Modified for pxa27x from ohci-lh7a404.c
	17	* by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
	18	*
	19	* This file is licenced under the GPL.
	20	*/
	21
	22	#include <linux/device.h>
4e57b681	23	#include <linux/signal.h>
d052d1be	24	#include <linux/platform_device.h>
4fd5f826	25
1da177e4 LT	26	#include <asm/mach-types.h>
	27	#include <asm/hardware.h>
	28	#include <asm/arch/pxa-regs.h>
81f280e2	29	#include <asm/arch/ohci.h>
1da177e4 LT	30
	31	#define PXA_UHC_MAX_PORTNUM 3
	32
	33	#define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 )
	34
1da177e4 LT	35	/*
	36	PMM_NPS_MODE -- PMM Non-power switching mode
	37	Ports are powered continuously.
	38
	39	PMM_GLOBAL_MODE -- PMM global switching mode
	40	All ports are powered at the same time.
	41
	42	PMM_PERPORT_MODE -- PMM per port switching mode
	43	Ports are powered individually.
	44	*/
	45	static int pxa27x_ohci_select_pmm( int mode )
	46	{
1da177e4 LT	47	switch ( mode ) {
	48	case PMM_NPS_MODE:
	49	UHCRHDA \|= RH_A_NPS;
	50	break;
	51	case PMM_GLOBAL_MODE:
	52	UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
	53	break;
	54	case PMM_PERPORT_MODE:
	55	UHCRHDA &= ~(RH_A_NPS);
	56	UHCRHDA \|= RH_A_PSM;
	57
	58	/* Set port power control mask bits, only 3 ports. */
	59	UHCRHDB \|= (0x7<<17);
	60	break;
	61	default:
	62	printk( KERN_ERR
	63	"Invalid mode %d, set to non-power switch mode.\n",
	64	mode );
	65
1da177e4 LT	66	UHCRHDA \|= RH_A_NPS;
	67	}
	68
	69	return 0;
	70	}
	71
1da177e4 LT	72	extern int usb_disabled(void);
	73
	74	/-------------------------------------------------------------------------/
	75
81f280e2	76	static int pxa27x_start_hc(struct device *dev)
1da177e4	77	{
81f280e2 RP	78	int retval = 0;
	79	struct pxaohci_platform_data *inf;
	80
	81	inf = dev->platform_data;
	82
1da177e4 LT	83	pxa_set_cken(CKEN10_USBHOST, 1);
	84
	85	UHCHR \|= UHCHR_FHR;
	86	udelay(11);
	87	UHCHR &= ~UHCHR_FHR;
	88
	89	UHCHR \|= UHCHR_FSBIR;
	90	while (UHCHR & UHCHR_FSBIR)
	91	cpu_relax();
	92
81f280e2 RP	93	if (inf->init)
81f280e2 RP	94	retval = inf->init(dev);
155faf5e	95
81f280e2 RP	96	if (retval < 0)
81f280e2 RP	97	return retval;
1da177e4 LT	98
	99	UHCHR &= ~UHCHR_SSE;
	100
	101	UHCHIE = (UHCHIE_UPRIE \| UHCHIE_RWIE);
155faf5e DB	102
	103	/* Clear any OTG Pin Hold */
	104	if (PSSR & PSSR_OTGPH)
	105	PSSR \|= PSSR_OTGPH;
81f280e2 RP	106
81f280e2 RP	107	return 0;
1da177e4 LT	108	}
1da177e4 LT	109
81f280e2	110	static void pxa27x_stop_hc(struct device *dev)
1da177e4	111	{
81f280e2 RP	112	struct pxaohci_platform_data *inf;
	113
	114	inf = dev->platform_data;
	115
	116	if (inf->exit)
	117	inf->exit(dev);
	118
1da177e4 LT	119	UHCHR \|= UHCHR_FHR;
	120	udelay(11);
	121	UHCHR &= ~UHCHR_FHR;
	122
	123	UHCCOMS \|= 1;
	124	udelay(10);
	125
	126	pxa_set_cken(CKEN10_USBHOST, 0);
	127	}
	128
	129
	130	/-------------------------------------------------------------------------/
	131
	132	/* configure so an HC device and id are always provided */
	133	/* always called with process context; sleeping is OK */
	134
	135
	136	/**
	137	* usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
	138	* Context: !in_interrupt()
	139	*
	140	* Allocates basic resources for this USB host controller, and
	141	* then invokes the start() method for the HCD associated with it
	142	* through the hotplug entry's driver_data.
	143	*
	144	*/
81f280e2	145	int usb_hcd_pxa27x_probe (const struct hc_driver driver, struct platform_device pdev)
1da177e4 LT	146	{
	147	int retval;
	148	struct usb_hcd *hcd;
81f280e2 RP	149	struct pxaohci_platform_data *inf;
	150
	151	inf = pdev->dev.platform_data;
1da177e4	152
81f280e2 RP	153	if (!inf)
	154	return -ENODEV;
	155
	156	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
1da177e4 LT	157	pr_debug ("resource[1] is not IORESOURCE_IRQ");
	158	return -ENOMEM;
	159	}
	160
81f280e2	161	hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
1da177e4 LT	162	if (!hcd)
1da177e4 LT	163	return -ENOMEM;
81f280e2 RP	164	hcd->rsrc_start = pdev->resource[0].start;
81f280e2 RP	165	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
1da177e4 LT	166
	167	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	168	pr_debug("request_mem_region failed");
	169	retval = -EBUSY;
	170	goto err1;
	171	}
	172
	173	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	174	if (!hcd->regs) {
	175	pr_debug("ioremap failed");
	176	retval = -ENOMEM;
	177	goto err2;
	178	}
	179
81f280e2 RP	180	if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) {
	181	pr_debug("pxa27x_start_hc failed");
	182	goto err3;
	183	}
1da177e4 LT	184
1da177e4 LT	185	/* Select Power Management Mode */
81f280e2	186	pxa27x_ohci_select_pmm(inf->port_mode);
1da177e4	187
0c27c5d5 RP	188	if (inf->power_budget)
	189	hcd->power_budget = inf->power_budget;
	190
1da177e4 LT	191	ohci_hcd_init(hcd_to_ohci(hcd));
1da177e4 LT	192
d54b5caa	193	retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);
1da177e4 LT	194	if (retval == 0)
	195	return retval;
	196
81f280e2 RP	197	pxa27x_stop_hc(&pdev->dev);
81f280e2 RP	198	err3:
1da177e4 LT	199	iounmap(hcd->regs);
	200	err2:
	201	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	202	err1:
	203	usb_put_hcd(hcd);
	204	return retval;
	205	}
	206
	207
	208	/* may be called without controller electrically present */
	209	/* may be called with controller, bus, and devices active */
	210
	211	/**
	212	* usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
	213	* @dev: USB Host Controller being removed
	214	* Context: !in_interrupt()
	215	*
	216	* Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
	217	* the HCD's stop() method. It is always called from a thread
	218	* context, normally "rmmod", "apmd", or something similar.
	219	*
	220	*/
81f280e2	221	void usb_hcd_pxa27x_remove (struct usb_hcd hcd, struct platform_device pdev)
1da177e4 LT	222	{
1da177e4 LT	223	usb_remove_hcd(hcd);
81f280e2	224	pxa27x_stop_hc(&pdev->dev);
1da177e4 LT	225	iounmap(hcd->regs);
	226	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	227	usb_put_hcd(hcd);
	228	}
	229
	230	/-------------------------------------------------------------------------/
	231
	232	static int __devinit
	233	ohci_pxa27x_start (struct usb_hcd *hcd)
	234	{
	235	struct ohci_hcd *ohci = hcd_to_ohci (hcd);
	236	int ret;
	237
	238	ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
	239
fdd13b36 DB	240	/* The value of NDP in roothub_a is incorrect on this hardware */
	241	ohci->num_ports = 3;
	242
1da177e4 LT	243	if ((ret = ohci_init(ohci)) < 0)
	244	return ret;
	245
	246	if ((ret = ohci_run (ohci)) < 0) {
	247	err ("can't start %s", hcd->self.bus_name);
	248	ohci_stop (hcd);
	249	return ret;
	250	}
	251
	252	return 0;
	253	}
	254
	255	/-------------------------------------------------------------------------/
	256
	257	static const struct hc_driver ohci_pxa27x_hc_driver = {
	258	.description = hcd_name,
	259	.product_desc = "PXA27x OHCI",
	260	.hcd_priv_size = sizeof(struct ohci_hcd),
	261
	262	/*
	263	* generic hardware linkage
	264	*/
	265	.irq = ohci_irq,
	266	.flags = HCD_USB11 \| HCD_MEMORY,
	267
	268	/*
	269	* basic lifecycle operations
	270	*/
	271	.start = ohci_pxa27x_start,
	272	.stop = ohci_stop,
	273
	274	/*
	275	* managing i/o requests and associated device resources
	276	*/
	277	.urb_enqueue = ohci_urb_enqueue,
	278	.urb_dequeue = ohci_urb_dequeue,
	279	.endpoint_disable = ohci_endpoint_disable,
	280
	281	/*
	282	* scheduling support
	283	*/
	284	.get_frame_number = ohci_get_frame,
	285
	286	/*
	287	* root hub support
	288	*/
	289	.hub_status_data = ohci_hub_status_data,
	290	.hub_control = ohci_hub_control,
8ad7fe16	291	#ifdef CONFIG_PM
0c0382e3 AS	292	.bus_suspend = ohci_bus_suspend,
0c0382e3 AS	293	.bus_resume = ohci_bus_resume,
1da177e4	294	#endif
9293677a	295	.start_port_reset = ohci_start_port_reset,
1da177e4 LT	296	};
	297
	298	/-------------------------------------------------------------------------/
	299
3ae5eaec	300	static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
1da177e4	301	{
1da177e4 LT	302	pr_debug ("In ohci_hcd_pxa27x_drv_probe");
	303
	304	if (usb_disabled())
	305	return -ENODEV;
	306
81f280e2	307	return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
1da177e4 LT	308	}
1da177e4 LT	309
3ae5eaec	310	static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
1da177e4	311	{
3ae5eaec	312	struct usb_hcd *hcd = platform_get_drvdata(pdev);
1da177e4 LT	313
1da177e4 LT	314	usb_hcd_pxa27x_remove(hcd, pdev);
a5e36d20	315	platform_set_drvdata(pdev, NULL);
1da177e4 LT	316	return 0;
	317	}
	318
2e1dcc16 RP	319	#ifdef CONFIG_PM
2e1dcc16 RP	320	static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state)
1da177e4	321	{
a5e36d20 RP	322	struct usb_hcd *hcd = platform_get_drvdata(pdev);
a5e36d20 RP	323	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
2e1dcc16 RP	324
	325	if (time_before(jiffies, ohci->next_statechange))
	326	msleep(5);
	327	ohci->next_statechange = jiffies;
	328
	329	pxa27x_stop_hc(&pdev->dev);
a5e36d20	330	hcd->state = HC_STATE_SUSPENDED;
2e1dcc16	331	pdev->dev.power.power_state = PMSG_SUSPEND;
1da177e4 LT	332
	333	return 0;
	334	}
	335
2e1dcc16	336	static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev)
1da177e4	337	{
a5e36d20 RP	338	struct usb_hcd *hcd = platform_get_drvdata(pdev);
a5e36d20 RP	339	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
2e1dcc16 RP	340	int status;
	341
	342	if (time_before(jiffies, ohci->next_statechange))
	343	msleep(5);
	344	ohci->next_statechange = jiffies;
	345
	346	if ((status = pxa27x_start_hc(&pdev->dev)) < 0)
	347	return status;
	348
	349	pdev->dev.power.power_state = PMSG_ON;
a5e36d20	350	usb_hcd_resume_root_hub(hcd);
1da177e4 LT	351
	352	return 0;
	353	}
2e1dcc16	354	#endif
1da177e4 LT	355
1da177e4 LT	356
3ae5eaec	357	static struct platform_driver ohci_hcd_pxa27x_driver = {
1da177e4 LT	358	.probe = ohci_hcd_pxa27x_drv_probe,
1da177e4 LT	359	.remove = ohci_hcd_pxa27x_drv_remove,
2e1dcc16	360	#ifdef CONFIG_PM
1da177e4	361	.suspend = ohci_hcd_pxa27x_drv_suspend,
3ae5eaec	362	.resume = ohci_hcd_pxa27x_drv_resume,
2e1dcc16	363	#endif
3ae5eaec RK	364	.driver = {
	365	.name = "pxa27x-ohci",
	366	},
1da177e4 LT	367	};
	368
	369	static int __init ohci_hcd_pxa27x_init (void)
	370	{
	371	pr_debug (DRIVER_INFO " (pxa27x)");
	372	pr_debug ("block sizes: ed %d td %d\n",
	373	sizeof (struct ed), sizeof (struct td));
	374
3ae5eaec	375	return platform_driver_register(&ohci_hcd_pxa27x_driver);
1da177e4 LT	376	}
	377
	378	static void __exit ohci_hcd_pxa27x_cleanup (void)
	379	{
3ae5eaec	380	platform_driver_unregister(&ohci_hcd_pxa27x_driver);
1da177e4 LT	381	}
	382
	383	module_init (ohci_hcd_pxa27x_init);
	384	module_exit (ohci_hcd_pxa27x_cleanup);