[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);


#ifdef	CONFIG_PM

/**
 * usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
 * @dev: USB Host Controller being suspended
 * @message: Power Management message describing this state transition
 *
 * Store this function in the HCD's struct pci_driver as .suspend.
 */
int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
{
	struct usb_hcd		*hcd = pci_get_drvdata(dev);
	int			retval = 0;
	int			wake, w;
	int			has_pci_pm;

	/* 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...
	 *
	 * We must ignore the FREEZE vs SUSPEND distinction here, because
	 * otherwise the swsusp will save (and restore) garbage state.
	 */
	if (!(hcd->state == HC_STATE_SUSPENDED ||
			hcd->state == HC_STATE_HALT)) {
		dev_warn(&dev->dev, "Root hub is not suspended\n");
		retval = -EBUSY;
		goto done;
	}

	/* We might already be suspended (runtime PM -- not yet written) */
	if (dev->current_state != PCI_D0)
		goto done;

	if (hcd->driver->pci_suspend) {
		retval = hcd->driver->pci_suspend(hcd, message);
		suspend_report_result(hcd->driver->pci_suspend, retval);
		if (retval)
			goto done;
	}

	synchronize_irq(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) and enter some PCI
	 * low power state, if the hardware allows.
	 */
	pci_disable_device(dev);

	pci_save_state(dev);

	/* Don't fail on error to enable wakeup.  We rely on pci code
	 * to reject requests the hardware can't implement, rather
	 * than coding the same thing.
	 */
	wake = (hcd->state == HC_STATE_SUSPENDED &&
			device_may_wakeup(&dev->dev));
	w = pci_wake_from_d3(dev, wake);
	if (w < 0)
		wake = w;
	dev_dbg(&dev->dev, "wakeup: %d\n", wake);

	/* Don't change state if we don't need to */
	if (message.event == PM_EVENT_FREEZE ||
			message.event == PM_EVENT_PRETHAW) {
		dev_dbg(&dev->dev, "--> no state change\n");
		goto done;
	}

	has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
	if (!has_pci_pm) {
		dev_dbg(&dev->dev, "--> PCI D0 legacy\n");
	} else {

		/* NOTE:  dev->current_state becomes nonzero only here, and
		 * only for devices that support PCI PM.  Also, exiting
		 * PCI_D3 (but not PCI_D1 or PCI_D2) is allowed to reset
		 * some device state (e.g. as part of clock reinit).
		 */
		retval = pci_set_power_state(dev, PCI_D3hot);
		suspend_report_result(pci_set_power_state, retval);
		if (retval == 0) {
			dev_dbg(&dev->dev, "--> PCI D3\n");
		} else {
			dev_dbg(&dev->dev, "PCI D3 suspend fail, %d\n",
					retval);
			pci_restore_state(dev);
		}
	}

#ifdef CONFIG_PPC_PMAC
	if (retval == 0) {
		/* Disable ASIC clocks for USB */
		if (machine_is(powermac)) {
			struct device_node	*of_node;

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

 done:
	return retval;
}
EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);

/**
 * usb_hcd_pci_resume - power management resume of a PCI-based HCD
 * @dev: USB Host Controller being resumed
 *
 * Store this function in the HCD's struct pci_driver as .resume.
 */
int usb_hcd_pci_resume(struct pci_dev *dev)
{
	struct usb_hcd		*hcd;
	int			retval;

#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(dev);
		if (of_node)
			pmac_call_feature(PMAC_FTR_USB_ENABLE,
						of_node, 0, 1);
	}
#endif

	pci_restore_state(dev);

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

	pci_enable_wake(dev, PCI_D0, false);

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

	pci_set_master(dev);

	/* yes, ignore this result too... */
	(void) pci_wake_from_d3(dev, 0);

	clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);

	if (hcd->driver->pci_resume) {
		retval = hcd->driver->pci_resume(hcd);
		if (retval) {
			dev_err(hcd->self.controller,
				"PCI post-resume error %d!\n", retval);
			usb_hc_died(hcd);
		}
	}
	return retval;
}
EXPORT_SYMBOL_GPL(usb_hcd_pci_resume);

#endif	/* CONFIG_PM */

/**
 * 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);
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 LT	187
	188
	189	#ifdef CONFIG_PM
	190
1da177e4 LT	191	/**
	192	* usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
	193	* @dev: USB Host Controller being suspended
a0d4922d	194	* @message: Power Management message describing this state transition
1da177e4	195	*
a0d4922d	196	* Store this function in the HCD's struct pci_driver as .suspend.
1da177e4	197	*/
34bbe4c1	198	int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
1da177e4	199	{
a0d4922d	200	struct usb_hcd *hcd = pci_get_drvdata(dev);
1da177e4	201	int retval = 0;
a0d4922d	202	int wake, w;
a15d95a0	203	int has_pci_pm;
1da177e4	204
5f827ea3 DB	205	/* Root hub suspend should have stopped all downstream traffic,
	206	* and all bus master traffic. And done so for both the interface
	207	* and the stub usb_device (which we check here). But maybe it
	208	* didn't; writing sysfs power/state files ignores such rules...
	209	*
	210	* We must ignore the FREEZE vs SUSPEND distinction here, because
	211	* otherwise the swsusp will save (and restore) garbage state.
	212	*/
f3fd77cd	213	if (!(hcd->state == HC_STATE_SUSPENDED \|\|
a0d4922d AS	214	hcd->state == HC_STATE_HALT)) {
	215	dev_warn(&dev->dev, "Root hub is not suspended\n");
	216	retval = -EBUSY;
	217	goto done;
	218	}
	219
	220	/* We might already be suspended (runtime PM -- not yet written) */
	221	if (dev->current_state != PCI_D0)
	222	goto done;
5f827ea3	223
7be7d741 AS	224	if (hcd->driver->pci_suspend) {
	225	retval = hcd->driver->pci_suspend(hcd, message);
	226	suspend_report_result(hcd->driver->pci_suspend, retval);
02669492	227	if (retval)
5f827ea3	228	goto done;
5f827ea3 DB	229	}
5f827ea3 DB	230
a0d4922d	231	synchronize_irq(dev->irq);
c6053ecf	232
a15d95a0 RW	233	/* Downstream ports from this root hub should already be quiesced, so
	234	* there will be no DMA activity. Now we can shut down the upstream
	235	* link (except maybe for PME# resume signaling) and enter some PCI
	236	* low power state, if the hardware allows.
	237	*/
	238	pci_disable_device(dev);
	239
	240	pci_save_state(dev);
	241
a0d4922d AS	242	/* Don't fail on error to enable wakeup. We rely on pci code
	243	* to reject requests the hardware can't implement, rather
	244	* than coding the same thing.
1da177e4	245	*/
a0d4922d AS	246	wake = (hcd->state == HC_STATE_SUSPENDED &&
	247	device_may_wakeup(&dev->dev));
	248	w = pci_wake_from_d3(dev, wake);
	249	if (w < 0)
	250	wake = w;
	251	dev_dbg(&dev->dev, "wakeup: %d\n", wake);
1da177e4	252
a0d4922d AS	253	/* Don't change state if we don't need to */
	254	if (message.event == PM_EVENT_FREEZE \|\|
	255	message.event == PM_EVENT_PRETHAW) {
	256	dev_dbg(&dev->dev, "--> no state change\n");
	257	goto done;
	258	}
	259
	260	has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
	261	if (!has_pci_pm) {
	262	dev_dbg(&dev->dev, "--> PCI D0 legacy\n");
	263	} else {
1da177e4	264
c6053ecf DB	265	/* NOTE: dev->current_state becomes nonzero only here, and
	266	* only for devices that support PCI PM. Also, exiting
	267	* PCI_D3 (but not PCI_D1 or PCI_D2) is allowed to reset
	268	* some device state (e.g. as part of clock reinit).
1da177e4	269	*/
34bbe4c1	270	retval = pci_set_power_state(dev, PCI_D3hot);
02669492	271	suspend_report_result(pci_set_power_state, retval);
1da177e4	272	if (retval == 0) {
a0d4922d	273	dev_dbg(&dev->dev, "--> PCI D3\n");
5f827ea3	274	} else {
34bbe4c1	275	dev_dbg(&dev->dev, "PCI D3 suspend fail, %d\n",
c6053ecf	276	retval);
a0d4922d	277	pci_restore_state(dev);
1da177e4	278	}
1da177e4 LT	279	}
1da177e4 LT	280
21b1861f	281	#ifdef CONFIG_PPC_PMAC
a0d4922d	282	if (retval == 0) {
21b1861f	283	/* Disable ASIC clocks for USB */
e8222502	284	if (machine_is(powermac)) {
21b1861f DB	285	struct device_node *of_node;
21b1861f DB	286
34bbe4c1	287	of_node = pci_device_to_OF_node(dev);
21b1861f DB	288	if (of_node)
	289	pmac_call_feature(PMAC_FTR_USB_ENABLE,
	290	of_node, 0, 0);
	291	}
21b1861f	292	}
a0d4922d	293	#endif
21b1861f	294
a0d4922d	295	done:
1da177e4 LT	296	return retval;
1da177e4 LT	297	}
a15d95a0	298	EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);
1da177e4	299
a0d4922d AS	300	/**
	301	* usb_hcd_pci_resume - power management resume of a PCI-based HCD
	302	* @dev: USB Host Controller being resumed
	303	*
	304	* Store this function in the HCD's struct pci_driver as .resume.
	305	*/
	306	int usb_hcd_pci_resume(struct pci_dev *dev)
	307	{
	308	struct usb_hcd *hcd;
	309	int retval;
	310
a15d95a0 RW	311	#ifdef CONFIG_PPC_PMAC
	312	/* Reenable ASIC clocks for USB */
	313	if (machine_is(powermac)) {
	314	struct device_node *of_node;
	315
	316	of_node = pci_device_to_OF_node(dev);
	317	if (of_node)
	318	pmac_call_feature(PMAC_FTR_USB_ENABLE,
	319	of_node, 0, 1);
	320	}
	321	#endif
	322
3494252d RW	323	pci_restore_state(dev);
3494252d RW	324
a0d4922d AS	325	hcd = pci_get_drvdata(dev);
	326	if (hcd->state != HC_STATE_SUSPENDED) {
	327	dev_dbg(hcd->self.controller,
	328	"can't resume, not suspended!\n");
	329	return 0;
c6053ecf DB	330	}
c6053ecf DB	331
a15d95a0 RW	332	pci_enable_wake(dev, PCI_D0, false);
a15d95a0 RW	333
34bbe4c1	334	retval = pci_enable_device(dev);
c6053ecf	335	if (retval < 0) {
a0d4922d AS	336	dev_err(&dev->dev, "can't re-enable after resume, %d!\n",
a0d4922d AS	337	retval);
c6053ecf DB	338	return retval;
c6053ecf DB	339	}
a0d4922d	340
34bbe4c1	341	pci_set_master(dev);
a0d4922d AS	342
	343	/* yes, ignore this result too... */
	344	(void) pci_wake_from_d3(dev, 0);
c6053ecf	345
8de98402	346	clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
1da177e4	347
7be7d741 AS	348	if (hcd->driver->pci_resume) {
7be7d741 AS	349	retval = hcd->driver->pci_resume(hcd);
5f827ea3	350	if (retval) {
34bbe4c1	351	dev_err(hcd->self.controller,
5f827ea3	352	"PCI post-resume error %d!\n", retval);
34bbe4c1	353	usb_hc_died(hcd);
5f827ea3	354	}
1da177e4	355	}
1da177e4 LT	356	return retval;
1da177e4 LT	357	}
782e70c6	358	EXPORT_SYMBOL_GPL(usb_hcd_pci_resume);
1da177e4 LT	359
	360	#endif /* CONFIG_PM */
	361
64a21d02 AG	362	/**
	363	* usb_hcd_pci_shutdown - shutdown host controller
	364	* @dev: USB Host Controller being shutdown
	365	*/
34bbe4c1	366	void usb_hcd_pci_shutdown(struct pci_dev *dev)
64a21d02 AG	367	{
	368	struct usb_hcd *hcd;
	369
	370	hcd = pci_get_drvdata(dev);
	371	if (!hcd)
	372	return;
	373
	374	if (hcd->driver->shutdown)
	375	hcd->driver->shutdown(hcd);
	376	}
782e70c6	377	EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
1da177e4	378