[deliverable/linux.git] / drivers / usb / core / hcd-pci.c

/*
 * (C) Copyright David Brownell 2000-2002
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/usb.h>

#include <asm/io.h>
#include <asm/irq.h>

#ifdef CONFIG_PPC_PMAC
#include <asm/machdep.h>
#include <asm/pmac_feature.h>
#include <asm/pci-bridge.h>
#include <asm/prom.h>
#endif

#include "usb.h"
#include "hcd.h"


/* PCI-based HCs are common, but plenty of non-PCI HCs are used too */


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

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

/**
 * usb_hcd_pci_probe - initialize PCI-based HCDs
 * @dev: USB Host Controller being probed
 * @id: pci hotplug id connecting controller to HCD framework
 * Context: !in_interrupt()
 *
 * Allocates basic PCI 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.
 *
 * Store this function in the HCD's struct pci_driver as probe().
 */
int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
	struct hc_driver	*driver;
	struct usb_hcd		*hcd;
	int			retval;

	if (usb_disabled())
		return -ENODEV;

	if (!id)
		return -EINVAL;
	driver = (struct hc_driver *)id->driver_data;
	if (!driver)
		return -EINVAL;

	if (pci_enable_device(dev) < 0)
		return -ENODEV;
	dev->current_state = PCI_D0;

	if (!dev->irq) {
		dev_err(&dev->dev,
			"Found HC with no IRQ.  Check BIOS/PCI %s setup!\n",
			pci_name(dev));
		retval = -ENODEV;
		goto err1;
	}

	hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
	if (!hcd) {
		retval = -ENOMEM;
		goto err1;
	}

	if (driver->flags & HCD_MEMORY) {
		/* EHCI, OHCI */
		hcd->rsrc_start = pci_resource_start(dev, 0);
		hcd->rsrc_len = pci_resource_len(dev, 0);
		if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
				driver->description)) {
			dev_dbg(&dev->dev, "controller already in use\n");
			retval = -EBUSY;
			goto err2;
		}
		hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
		if (hcd->regs == NULL) {
			dev_dbg(&dev->dev, "error mapping memory\n");
			retval = -EFAULT;
			goto err3;
		}

	} else {
		/* UHCI */
		int	region;

		for (region = 0; region < PCI_ROM_RESOURCE; region++) {
			if (!(pci_resource_flags(dev, region) &
					IORESOURCE_IO))
				continue;

			hcd->rsrc_start = pci_resource_start(dev, region);
			hcd->rsrc_len = pci_resource_len(dev, region);
			if (request_region(hcd->rsrc_start, hcd->rsrc_len,
					driver->description))
				break;
		}
		if (region == PCI_ROM_RESOURCE) {
			dev_dbg(&dev->dev, "no i/o regions available\n");
			retval = -EBUSY;
			goto err1;
		}
	}

	pci_set_master(dev);

	retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
	if (retval != 0)
		goto err4;
	return retval;

 err4:
	if (driver->flags & HCD_MEMORY) {
		iounmap(hcd->regs);
 err3:
		release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	} else
		release_region(hcd->rsrc_start, hcd->rsrc_len);
 err2:
	usb_put_hcd(hcd);
 err1:
	pci_disable_device(dev);
	dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
	return retval;
}
EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);


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

/**
 * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_pci_probe(), first invoking
 * the HCD's stop() method.  It is always called from a thread
 * context, normally "rmmod", "apmd", or something similar.
 *
 * Store this function in the HCD's struct pci_driver as remove().
 */
void usb_hcd_pci_remove(struct pci_dev *dev)
{
	struct usb_hcd		*hcd;

	hcd = pci_get_drvdata(dev);
	if (!hcd)
		return;

	usb_remove_hcd(hcd);
	if (hcd->driver->flags & HCD_MEMORY) {
		iounmap(hcd->regs);
		release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	} else {
		release_region(hcd->rsrc_start, hcd->rsrc_len);
	}
	usb_put_hcd(hcd);
	pci_disable_device(dev);
}
EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);

/**
 * usb_hcd_pci_shutdown - shutdown host controller
 * @dev: USB Host Controller being shutdown
 */
void usb_hcd_pci_shutdown(struct pci_dev *dev)
{
	struct usb_hcd		*hcd;

	hcd = pci_get_drvdata(dev);
	if (!hcd)
		return;

	if (hcd->driver->shutdown)
		hcd->driver->shutdown(hcd);
}
EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);

#ifdef	CONFIG_PM_SLEEP

static int check_root_hub_suspended(struct device *dev)
{
	struct pci_dev		*pci_dev = to_pci_dev(dev);
	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);

	if (!(hcd->state == HC_STATE_SUSPENDED ||
			hcd->state == HC_STATE_HALT)) {
		dev_warn(dev, "Root hub is not suspended\n");
		return -EBUSY;
	}
	return 0;
}

static int hcd_pci_suspend(struct device *dev)
{
	struct pci_dev		*pci_dev = to_pci_dev(dev);
	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);
	int			retval;

	/* Root hub suspend should have stopped all downstream traffic,
	 * and all bus master traffic.  And done so for both the interface
	 * and the stub usb_device (which we check here).  But maybe it
	 * didn't; writing sysfs power/state files ignores such rules...
	 */
	retval = check_root_hub_suspended(dev);
	if (retval)
		return retval;

	/* We might already be suspended (runtime PM -- not yet written) */
	if (pci_dev->current_state != PCI_D0)
		return retval;

	if (hcd->driver->pci_suspend) {
		retval = hcd->driver->pci_suspend(hcd);
		suspend_report_result(hcd->driver->pci_suspend, retval);
		if (retval)
			return retval;
	}

	synchronize_irq(pci_dev->irq);

	/* Downstream ports from this root hub should already be quiesced, so
	 * there will be no DMA activity.  Now we can shut down the upstream
	 * link (except maybe for PME# resume signaling).  We'll enter a
	 * low power state during suspend_noirq, if the hardware allows.
	 */
	pci_disable_device(pci_dev);
	return retval;
}

static int hcd_pci_suspend_noirq(struct device *dev)
{
	struct pci_dev		*pci_dev = to_pci_dev(dev);
	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);
	int			retval;

	retval = check_root_hub_suspended(dev);
	if (retval)
		return retval;

	pci_save_state(pci_dev);

	/* If the root hub is HALTed rather than SUSPENDed,
	 * disallow remote wakeup.
	 */
	if (hcd->state == HC_STATE_HALT)
		device_set_wakeup_enable(dev, 0);
	dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));

	/* Possibly enable remote wakeup,
	 * choose the appropriate low-power state, and go to that state.
	 */
	retval = pci_prepare_to_sleep(pci_dev);
	if (retval == -EIO) {		/* Low-power not supported */
		dev_dbg(dev, "--> PCI D0 legacy\n");
		retval = 0;
	} else if (retval == 0) {
		dev_dbg(dev, "--> PCI %s\n",
				pci_power_name(pci_dev->current_state));
	} else {
		suspend_report_result(pci_prepare_to_sleep, retval);
		return retval;
	}

#ifdef CONFIG_PPC_PMAC
	/* Disable ASIC clocks for USB */
	if (machine_is(powermac)) {
		struct device_node	*of_node;

		of_node = pci_device_to_OF_node(pci_dev);
		if (of_node)
			pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
	}
#endif
	return retval;
}

static int hcd_pci_resume_noirq(struct device *dev)
{
	struct pci_dev		*pci_dev = to_pci_dev(dev);

#ifdef CONFIG_PPC_PMAC
	/* Reenable ASIC clocks for USB */
	if (machine_is(powermac)) {
		struct device_node *of_node;

		of_node = pci_device_to_OF_node(pci_dev);
		if (of_node)
			pmac_call_feature(PMAC_FTR_USB_ENABLE,
						of_node, 0, 1);
	}
#endif

	/* Go back to D0 and disable remote wakeup */
	pci_back_from_sleep(pci_dev);
	return 0;
}

static int resume_common(struct device *dev, bool hibernated)
{
	struct pci_dev		*pci_dev = to_pci_dev(dev);
	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);
	int			retval;

	if (hcd->state != HC_STATE_SUSPENDED) {
		dev_dbg(dev, "can't resume, not suspended!\n");
		return 0;
	}

	retval = pci_enable_device(pci_dev);
	if (retval < 0) {
		dev_err(dev, "can't re-enable after resume, %d!\n", retval);
		return retval;
	}

	pci_set_master(pci_dev);

	clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);

	if (hcd->driver->pci_resume) {
		retval = hcd->driver->pci_resume(hcd, hibernated);
		if (retval) {
			dev_err(dev, "PCI post-resume error %d!\n", retval);
			usb_hc_died(hcd);
		}
	}
	return retval;
}

static int hcd_pci_resume(struct device *dev)
{
	return resume_common(dev, false);
}

static int hcd_pci_restore(struct device *dev)
{
	return resume_common(dev, true);
}

const struct dev_pm_ops usb_hcd_pci_pm_ops = {
	.suspend	= hcd_pci_suspend,
	.suspend_noirq	= hcd_pci_suspend_noirq,
	.resume_noirq	= hcd_pci_resume_noirq,
	.resume		= hcd_pci_resume,
	.freeze		= check_root_hub_suspended,
	.freeze_noirq	= check_root_hub_suspended,
	.thaw_noirq	= NULL,
	.thaw		= NULL,
	.poweroff	= hcd_pci_suspend,
	.poweroff_noirq	= hcd_pci_suspend_noirq,
	.restore_noirq	= hcd_pci_resume_noirq,
	.restore	= hcd_pci_restore,
};
EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);

#endif	/* CONFIG_PM_SLEEP */
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* (C) Copyright David Brownell 2000-2002
34bbe4c1	3	*
1da177e4 LT	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License as published by the
	6	* Free Software Foundation; either version 2 of the License, or (at your
	7	* option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful, but
	10	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	11	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	12	* for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software Foundation,
	16	* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	17	*/
	18
1da177e4 LT	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/pci.h>
21b1861f DB	22	#include <linux/usb.h>
21b1861f DB	23
1da177e4 LT	24	#include <asm/io.h>
1da177e4 LT	25	#include <asm/irq.h>
21b1861f DB	26
	27	#ifdef CONFIG_PPC_PMAC
	28	#include <asm/machdep.h>
	29	#include <asm/pmac_feature.h>
	30	#include <asm/pci-bridge.h>
	31	#include <asm/prom.h>
	32	#endif
5f827ea3 DB	33
5f827ea3 DB	34	#include "usb.h"
1da177e4 LT	35	#include "hcd.h"
	36
	37
c6053ecf	38	/* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
1da177e4 LT	39
	40
	41	/-------------------------------------------------------------------------/
	42
	43	/* configure so an HC device and id are always provided */
	44	/* always called with process context; sleeping is OK */
	45
	46	/**
	47	* usb_hcd_pci_probe - initialize PCI-based HCDs
	48	* @dev: USB Host Controller being probed
	49	* @id: pci hotplug id connecting controller to HCD framework
	50	* Context: !in_interrupt()
	51	*
	52	* Allocates basic PCI resources for this USB host controller, and
	53	* then invokes the start() method for the HCD associated with it
	54	* through the hotplug entry's driver_data.
	55	*
	56	* Store this function in the HCD's struct pci_driver as probe().
	57	*/
34bbe4c1	58	int usb_hcd_pci_probe(struct pci_dev dev, const struct pci_device_id id)
1da177e4 LT	59	{
	60	struct hc_driver *driver;
	61	struct usb_hcd *hcd;
	62	int retval;
	63
	64	if (usb_disabled())
	65	return -ENODEV;
	66
34bbe4c1 GKH	67	if (!id)
	68	return -EINVAL;
	69	driver = (struct hc_driver *)id->driver_data;
	70	if (!driver)
1da177e4 LT	71	return -EINVAL;
1da177e4 LT	72
34bbe4c1	73	if (pci_enable_device(dev) < 0)
1da177e4	74	return -ENODEV;
c6053ecf	75	dev->current_state = PCI_D0;
34bbe4c1 GKH	76
	77	if (!dev->irq) {
	78	dev_err(&dev->dev,
1da177e4 LT	79	"Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
1da177e4 LT	80	pci_name(dev));
34bbe4c1	81	retval = -ENODEV;
1da177e4	82	goto err1;
34bbe4c1	83	}
1da177e4	84
34bbe4c1	85	hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
1da177e4 LT	86	if (!hcd) {
	87	retval = -ENOMEM;
	88	goto err1;
	89	}
	90
34bbe4c1 GKH	91	if (driver->flags & HCD_MEMORY) {
	92	/* EHCI, OHCI */
	93	hcd->rsrc_start = pci_resource_start(dev, 0);
	94	hcd->rsrc_len = pci_resource_len(dev, 0);
	95	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
1da177e4	96	driver->description)) {
34bbe4c1	97	dev_dbg(&dev->dev, "controller already in use\n");
1da177e4 LT	98	retval = -EBUSY;
	99	goto err2;
	100	}
34bbe4c1	101	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
1da177e4	102	if (hcd->regs == NULL) {
34bbe4c1	103	dev_dbg(&dev->dev, "error mapping memory\n");
1da177e4 LT	104	retval = -EFAULT;
	105	goto err3;
	106	}
	107
34bbe4c1 GKH	108	} else {
34bbe4c1 GKH	109	/* UHCI */
1da177e4 LT	110	int region;
	111
	112	for (region = 0; region < PCI_ROM_RESOURCE; region++) {
34bbe4c1	113	if (!(pci_resource_flags(dev, region) &
1da177e4 LT	114	IORESOURCE_IO))
	115	continue;
	116
34bbe4c1 GKH	117	hcd->rsrc_start = pci_resource_start(dev, region);
	118	hcd->rsrc_len = pci_resource_len(dev, region);
	119	if (request_region(hcd->rsrc_start, hcd->rsrc_len,
1da177e4 LT	120	driver->description))
	121	break;
	122	}
	123	if (region == PCI_ROM_RESOURCE) {
34bbe4c1	124	dev_dbg(&dev->dev, "no i/o regions available\n");
1da177e4 LT	125	retval = -EBUSY;
	126	goto err1;
	127	}
	128	}
	129
34bbe4c1	130	pci_set_master(dev);
1da177e4	131
442258e2	132	retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED \| IRQF_SHARED);
1da177e4 LT	133	if (retval != 0)
	134	goto err4;
	135	return retval;
	136
	137	err4:
	138	if (driver->flags & HCD_MEMORY) {
34bbe4c1	139	iounmap(hcd->regs);
1da177e4	140	err3:
34bbe4c1	141	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
1da177e4	142	} else
34bbe4c1	143	release_region(hcd->rsrc_start, hcd->rsrc_len);
1da177e4	144	err2:
34bbe4c1	145	usb_put_hcd(hcd);
1da177e4	146	err1:
34bbe4c1 GKH	147	pci_disable_device(dev);
34bbe4c1 GKH	148	dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
1da177e4	149	return retval;
34bbe4c1	150	}
782e70c6	151	EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
1da177e4 LT	152
	153
	154	/* may be called without controller electrically present */
	155	/* may be called with controller, bus, and devices active */
	156
	157	/**
	158	* usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
	159	* @dev: USB Host Controller being removed
	160	* Context: !in_interrupt()
	161	*
	162	* Reverses the effect of usb_hcd_pci_probe(), first invoking
	163	* the HCD's stop() method. It is always called from a thread
	164	* context, normally "rmmod", "apmd", or something similar.
	165	*
	166	* Store this function in the HCD's struct pci_driver as remove().
	167	*/
34bbe4c1	168	void usb_hcd_pci_remove(struct pci_dev *dev)
1da177e4 LT	169	{
	170	struct usb_hcd *hcd;
	171
	172	hcd = pci_get_drvdata(dev);
	173	if (!hcd)
	174	return;
	175
34bbe4c1	176	usb_remove_hcd(hcd);
1da177e4	177	if (hcd->driver->flags & HCD_MEMORY) {
34bbe4c1 GKH	178	iounmap(hcd->regs);
34bbe4c1 GKH	179	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
1da177e4	180	} else {
34bbe4c1	181	release_region(hcd->rsrc_start, hcd->rsrc_len);
1da177e4	182	}
34bbe4c1	183	usb_put_hcd(hcd);
1da177e4 LT	184	pci_disable_device(dev);
1da177e4 LT	185	}
782e70c6	186	EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
1da177e4	187
1da177e4	188	/**
abb30641 AS	189	* usb_hcd_pci_shutdown - shutdown host controller
abb30641 AS	190	* @dev: USB Host Controller being shutdown
1da177e4	191	*/
abb30641 AS	192	void usb_hcd_pci_shutdown(struct pci_dev *dev)
	193	{
	194	struct usb_hcd *hcd;
	195
	196	hcd = pci_get_drvdata(dev);
	197	if (!hcd)
	198	return;
	199
	200	if (hcd->driver->shutdown)
	201	hcd->driver->shutdown(hcd);
	202	}
	203	EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
	204
	205	#ifdef CONFIG_PM_SLEEP
	206
	207	static int check_root_hub_suspended(struct device *dev)
	208	{
	209	struct pci_dev *pci_dev = to_pci_dev(dev);
	210	struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
	211
	212	if (!(hcd->state == HC_STATE_SUSPENDED \|\|
	213	hcd->state == HC_STATE_HALT)) {
	214	dev_warn(dev, "Root hub is not suspended\n");
	215	return -EBUSY;
	216	}
	217	return 0;
	218	}
	219
	220	static int hcd_pci_suspend(struct device *dev)
1da177e4	221	{
abb30641 AS	222	struct pci_dev *pci_dev = to_pci_dev(dev);
	223	struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
	224	int retval;
1da177e4	225
5f827ea3 DB	226	/* Root hub suspend should have stopped all downstream traffic,
	227	* and all bus master traffic. And done so for both the interface
	228	* and the stub usb_device (which we check here). But maybe it
	229	* didn't; writing sysfs power/state files ignores such rules...
5f827ea3	230	*/
abb30641 AS	231	retval = check_root_hub_suspended(dev);
	232	if (retval)
	233	return retval;
a0d4922d AS	234
a0d4922d AS	235	/* We might already be suspended (runtime PM -- not yet written) */
abb30641 AS	236	if (pci_dev->current_state != PCI_D0)
abb30641 AS	237	return retval;
5f827ea3	238
7be7d741	239	if (hcd->driver->pci_suspend) {
6ec4beb5	240	retval = hcd->driver->pci_suspend(hcd);
7be7d741	241	suspend_report_result(hcd->driver->pci_suspend, retval);
02669492	242	if (retval)
abb30641	243	return retval;
5f827ea3 DB	244	}
5f827ea3 DB	245
abb30641	246	synchronize_irq(pci_dev->irq);
c6053ecf	247
a15d95a0 RW	248	/* Downstream ports from this root hub should already be quiesced, so
a15d95a0 RW	249	* there will be no DMA activity. Now we can shut down the upstream
abb30641 AS	250	* link (except maybe for PME# resume signaling). We'll enter a
abb30641 AS	251	* low power state during suspend_noirq, if the hardware allows.
a15d95a0	252	*/
abb30641 AS	253	pci_disable_device(pci_dev);
	254	return retval;
	255	}
	256
	257	static int hcd_pci_suspend_noirq(struct device *dev)
	258	{
	259	struct pci_dev *pci_dev = to_pci_dev(dev);
	260	struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
	261	int retval;
	262
	263	retval = check_root_hub_suspended(dev);
	264	if (retval)
	265	return retval;
a15d95a0	266
abb30641	267	pci_save_state(pci_dev);
a15d95a0	268
abb30641 AS	269	/* If the root hub is HALTed rather than SUSPENDed,
abb30641 AS	270	* disallow remote wakeup.
1da177e4	271	*/
abb30641 AS	272	if (hcd->state == HC_STATE_HALT)
	273	device_set_wakeup_enable(dev, 0);
	274	dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
a0d4922d	275
abb30641 AS	276	/* Possibly enable remote wakeup,
	277	* choose the appropriate low-power state, and go to that state.
	278	*/
	279	retval = pci_prepare_to_sleep(pci_dev);
	280	if (retval == -EIO) { /* Low-power not supported */
	281	dev_dbg(dev, "--> PCI D0 legacy\n");
	282	retval = 0;
	283	} else if (retval == 0) {
	284	dev_dbg(dev, "--> PCI %s\n",
	285	pci_power_name(pci_dev->current_state));
a0d4922d	286	} else {
abb30641 AS	287	suspend_report_result(pci_prepare_to_sleep, retval);
abb30641 AS	288	return retval;
1da177e4 LT	289	}
1da177e4 LT	290
21b1861f	291	#ifdef CONFIG_PPC_PMAC
abb30641 AS	292	/* Disable ASIC clocks for USB */
	293	if (machine_is(powermac)) {
	294	struct device_node *of_node;
	295
	296	of_node = pci_device_to_OF_node(pci_dev);
	297	if (of_node)
	298	pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
21b1861f	299	}
a0d4922d	300	#endif
1da177e4 LT	301	return retval;
1da177e4 LT	302	}
1da177e4	303
abb30641	304	static int hcd_pci_resume_noirq(struct device *dev)
a0d4922d	305	{
abb30641	306	struct pci_dev *pci_dev = to_pci_dev(dev);
a0d4922d	307
a15d95a0 RW	308	#ifdef CONFIG_PPC_PMAC
	309	/* Reenable ASIC clocks for USB */
	310	if (machine_is(powermac)) {
	311	struct device_node *of_node;
	312
abb30641	313	of_node = pci_device_to_OF_node(pci_dev);
a15d95a0 RW	314	if (of_node)
	315	pmac_call_feature(PMAC_FTR_USB_ENABLE,
	316	of_node, 0, 1);
	317	}
	318	#endif
	319
abb30641 AS	320	/* Go back to D0 and disable remote wakeup */
	321	pci_back_from_sleep(pci_dev);
	322	return 0;
	323	}
	324
	325	static int resume_common(struct device *dev, bool hibernated)
	326	{
	327	struct pci_dev *pci_dev = to_pci_dev(dev);
	328	struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
	329	int retval;
3494252d	330
a0d4922d	331	if (hcd->state != HC_STATE_SUSPENDED) {
abb30641	332	dev_dbg(dev, "can't resume, not suspended!\n");
a0d4922d	333	return 0;
c6053ecf DB	334	}
c6053ecf DB	335
abb30641	336	retval = pci_enable_device(pci_dev);
c6053ecf	337	if (retval < 0) {
abb30641	338	dev_err(dev, "can't re-enable after resume, %d!\n", retval);
c6053ecf DB	339	return retval;
c6053ecf DB	340	}
a0d4922d	341
abb30641	342	pci_set_master(pci_dev);
c6053ecf	343
8de98402	344	clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
1da177e4	345
7be7d741	346	if (hcd->driver->pci_resume) {
6ec4beb5	347	retval = hcd->driver->pci_resume(hcd, hibernated);
5f827ea3	348	if (retval) {
abb30641	349	dev_err(dev, "PCI post-resume error %d!\n", retval);
34bbe4c1	350	usb_hc_died(hcd);
5f827ea3	351	}
1da177e4	352	}
1da177e4 LT	353	return retval;
1da177e4 LT	354	}
1da177e4	355
abb30641	356	static int hcd_pci_resume(struct device *dev)
64a21d02	357	{
abb30641 AS	358	return resume_common(dev, false);
abb30641 AS	359	}
64a21d02	360
abb30641 AS	361	static int hcd_pci_restore(struct device *dev)
	362	{
	363	return resume_common(dev, true);
64a21d02	364	}
1da177e4	365
47145210	366	const struct dev_pm_ops usb_hcd_pci_pm_ops = {
abb30641 AS	367	.suspend = hcd_pci_suspend,
	368	.suspend_noirq = hcd_pci_suspend_noirq,
	369	.resume_noirq = hcd_pci_resume_noirq,
	370	.resume = hcd_pci_resume,
	371	.freeze = check_root_hub_suspended,
	372	.freeze_noirq = check_root_hub_suspended,
	373	.thaw_noirq = NULL,
	374	.thaw = NULL,
	375	.poweroff = hcd_pci_suspend,
	376	.poweroff_noirq = hcd_pci_suspend_noirq,
	377	.restore_noirq = hcd_pci_resume_noirq,
	378	.restore = hcd_pci_restore,
	379	};
	380	EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
	381
	382	#endif /* CONFIG_PM_SLEEP */