[deliverable/linux.git] / drivers / usb / host / ehci-pci.c

/*
 * EHCI HCD (Host Controller Driver) PCI Bus Glue.
 *
 * Copyright (c) 2000-2004 by David Brownell
 *
 * 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.
 */

#ifndef CONFIG_PCI
#error "This file is PCI bus glue.  CONFIG_PCI must be defined."
#endif

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

/* called after powerup, by probe or system-pm "wakeup" */
static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
{
	u32			temp;
	int			retval;

	/* optional debug port, normally in the first BAR */
	temp = pci_find_capability(pdev, 0x0a);
	if (temp) {
		pci_read_config_dword(pdev, temp, &temp);
		temp >>= 16;
		if ((temp & (3 << 13)) == (1 << 13)) {
			temp &= 0x1fff;
			ehci->debug = ehci_to_hcd(ehci)->regs + temp;
			temp = readl(&ehci->debug->control);
			ehci_info(ehci, "debug port %d%s\n",
				HCS_DEBUG_PORT(ehci->hcs_params),
				(temp & DBGP_ENABLED)
					? " IN USE"
					: "");
			if (!(temp & DBGP_ENABLED))
				ehci->debug = NULL;
		}
	}

	/* we expect static quirk code to handle the "extended capabilities"
	 * (currently just BIOS handoff) allowed starting with EHCI 0.96
	 */

	/* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
	retval = pci_set_mwi(pdev);
	if (!retval)
		ehci_dbg(ehci, "MWI active\n");

	ehci_port_power(ehci, 0);

	return 0;
}

/* called during probe() after chip reset completes */
static int ehci_pci_setup(struct usb_hcd *hcd)
{
	struct ehci_hcd		*ehci = hcd_to_ehci(hcd);
	struct pci_dev		*pdev = to_pci_dev(hcd->self.controller);
	u32			temp;
	int			retval;

	ehci->caps = hcd->regs;
	ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
	dbg_hcs_params(ehci, "reset");
	dbg_hcc_params(ehci, "reset");

	/* cache this readonly data; minimize chip reads */
	ehci->hcs_params = readl(&ehci->caps->hcs_params);

	retval = ehci_halt(ehci);
	if (retval)
		return retval;

	/* data structure init */
	retval = ehci_init(hcd);
	if (retval)
		return retval;

	/* NOTE:  only the parts below this line are PCI-specific */

	switch (pdev->vendor) {
	case PCI_VENDOR_ID_TDI:
		if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) {
			ehci->is_tdi_rh_tt = 1;
			tdi_reset(ehci);
		}
		break;
	case PCI_VENDOR_ID_AMD:
		/* AMD8111 EHCI doesn't work, according to AMD errata */
		if (pdev->device == 0x7463) {
			ehci_info(ehci, "ignoring AMD8111 (errata)\n");
			retval = -EIO;
			goto done;
		}
		break;
	case PCI_VENDOR_ID_NVIDIA:
		switch (pdev->device) {
		/* NVidia reports that certain chips don't handle
		 * QH, ITD, or SITD addresses above 2GB.  (But TD,
		 * data buffer, and periodic schedule are normal.)
		 */
		case 0x003c:	/* MCP04 */
		case 0x005b:	/* CK804 */
		case 0x00d8:	/* CK8 */
		case 0x00e8:	/* CK8S */
			if (pci_set_consistent_dma_mask(pdev,
						DMA_31BIT_MASK) < 0)
				ehci_warn(ehci, "can't enable NVidia "
					"workaround for >2GB RAM\n");
			break;
		/* Some NForce2 chips have problems with selective suspend;
		 * fixed in newer silicon.
		 */
		case 0x0068:
			pci_read_config_dword(pdev, PCI_REVISION_ID, &temp);
			if ((temp & 0xff) < 0xa4)
				ehci->no_selective_suspend = 1;
			break;
		}
		break;
	}

	if (ehci_is_TDI(ehci))
		ehci_reset(ehci);

	/* at least the Genesys GL880S needs fixup here */
	temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
	temp &= 0x0f;
	if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) {
		ehci_dbg(ehci, "bogus port configuration: "
			"cc=%d x pcc=%d < ports=%d\n",
			HCS_N_CC(ehci->hcs_params),
			HCS_N_PCC(ehci->hcs_params),
			HCS_N_PORTS(ehci->hcs_params));

		switch (pdev->vendor) {
		case 0x17a0:		/* GENESYS */
			/* GL880S: should be PORTS=2 */
			temp |= (ehci->hcs_params & ~0xf);
			ehci->hcs_params = temp;
			break;
		case PCI_VENDOR_ID_NVIDIA:
			/* NF4: should be PCC=10 */
			break;
		}
	}

	/* Serial Bus Release Number is at PCI 0x60 offset */
	pci_read_config_byte(pdev, 0x60, &ehci->sbrn);

	/* Workaround current PCI init glitch:  wakeup bits aren't
	 * being set from PCI PM capability.
	 */
	if (!device_can_wakeup(&pdev->dev)) {
		u16	port_wake;

		pci_read_config_word(pdev, 0x62, &port_wake);
		if (port_wake & 0x0001)
			device_init_wakeup(&pdev->dev, 1);
	}

#ifdef	CONFIG_USB_SUSPEND
	/* REVISIT: the controller works fine for wakeup iff the root hub
	 * itself is "globally" suspended, but usbcore currently doesn't
	 * understand such things.
	 *
	 * System suspend currently expects to be able to suspend the entire
	 * device tree, device-at-a-time.  If we failed selective suspend
	 * reports, system suspend would fail; so the root hub code must claim
	 * success.  That's lying to usbcore, and it matters for for runtime
	 * PM scenarios with selective suspend and remote wakeup...
	 */
	if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
		ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
#endif

	retval = ehci_pci_reinit(ehci, pdev);
done:
	return retval;
}

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

#ifdef	CONFIG_PM

/* suspend/resume, section 4.3 */

/* These routines rely on the PCI bus glue
 * to handle powerdown and wakeup, and currently also on
 * transceivers that don't need any software attention to set up
 * the right sort of wakeup.
 * Also they depend on separate root hub suspend/resume.
 */

static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
{
	struct ehci_hcd		*ehci = hcd_to_ehci(hcd);
	unsigned long		flags;
	int			rc = 0;

	if (time_before(jiffies, ehci->next_statechange))
		msleep(10);

	/* Root hub was already suspended. Disable irq emission and
	 * mark HW unaccessible, bail out if RH has been resumed. Use
	 * the spinlock to properly synchronize with possible pending
	 * RH suspend or resume activity.
	 *
	 * This is still racy as hcd->state is manipulated outside of
	 * any locks =P But that will be a different fix.
	 */
	spin_lock_irqsave (&ehci->lock, flags);
	if (hcd->state != HC_STATE_SUSPENDED) {
		rc = -EINVAL;
		goto bail;
	}
	writel (0, &ehci->regs->intr_enable);
	(void)readl(&ehci->regs->intr_enable);

	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 bail:
	spin_unlock_irqrestore (&ehci->lock, flags);

	// could save FLADJ in case of Vaux power loss
	// ... we'd only use it to handle clock skew

	return rc;
}

static int ehci_pci_resume(struct usb_hcd *hcd)
{
	struct ehci_hcd		*ehci = hcd_to_ehci(hcd);
	unsigned		port;
	struct pci_dev		*pdev = to_pci_dev(hcd->self.controller);
	int			retval = -EINVAL;

	// maybe restore FLADJ

	if (time_before(jiffies, ehci->next_statechange))
		msleep(100);

	/* Mark hardware accessible again as we are out of D3 state by now */
	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

	/* If CF is clear, we lost PCI Vaux power and need to restart.  */
	if (readl(&ehci->regs->configured_flag) != FLAG_CF)
		goto restart;

	/* If any port is suspended (or owned by the companion),
	 * we know we can/must resume the HC (and mustn't reset it).
	 * We just defer that to the root hub code.
	 */
	for (port = HCS_N_PORTS(ehci->hcs_params); port > 0; ) {
		u32	status;
		port--;
		status = readl(&ehci->regs->port_status [port]);
		if (!(status & PORT_POWER))
			continue;
		if (status & (PORT_SUSPEND | PORT_RESUME | PORT_OWNER)) {
			usb_hcd_resume_root_hub(hcd);
			return 0;
		}
	}

restart:
	ehci_dbg(ehci, "lost power, restarting\n");
	usb_root_hub_lost_power(hcd->self.root_hub);

	/* Else reset, to cope with power loss or flush-to-storage
	 * style "resume" having let BIOS kick in during reboot.
	 */
	(void) ehci_halt(ehci);
	(void) ehci_reset(ehci);
	(void) ehci_pci_reinit(ehci, pdev);

	/* emptying the schedule aborts any urbs */
	spin_lock_irq(&ehci->lock);
	if (ehci->reclaim)
		ehci->reclaim_ready = 1;
	ehci_work(ehci, NULL);
	spin_unlock_irq(&ehci->lock);

	/* restart; khubd will disconnect devices */
	retval = ehci_run(hcd);

	/* here we "know" root ports should always stay powered */
	ehci_port_power(ehci, 1);

	return retval;
}
#endif

static const struct hc_driver ehci_pci_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"EHCI Host Controller",
	.hcd_priv_size =	sizeof(struct ehci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq =			ehci_irq,
	.flags =		HCD_MEMORY | HCD_USB2,

	/*
	 * basic lifecycle operations
	 */
	.reset =		ehci_pci_setup,
	.start =		ehci_run,
#ifdef	CONFIG_PM
	.suspend =		ehci_pci_suspend,
	.resume =		ehci_pci_resume,
#endif
	.stop =			ehci_stop,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue =		ehci_urb_enqueue,
	.urb_dequeue =		ehci_urb_dequeue,
	.endpoint_disable =	ehci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number =	ehci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data =	ehci_hub_status_data,
	.hub_control =		ehci_hub_control,
	.bus_suspend =		ehci_bus_suspend,
	.bus_resume =		ehci_bus_resume,
};

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

/* PCI driver selection metadata; PCI hotplugging uses this */
static const struct pci_device_id pci_ids [] = { {
	/* handle any USB 2.0 EHCI controller */
	PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
	.driver_data =	(unsigned long) &ehci_pci_hc_driver,
	},
	{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, pci_ids);

/* pci driver glue; this is a "new style" PCI driver module */
static struct pci_driver ehci_pci_driver = {
	.name =		(char *) hcd_name,
	.id_table =	pci_ids,

	.probe =	usb_hcd_pci_probe,
	.remove =	usb_hcd_pci_remove,

#ifdef	CONFIG_PM
	.suspend =	usb_hcd_pci_suspend,
	.resume =	usb_hcd_pci_resume,
#endif
};

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

	pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
		hcd_name,
		sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
		sizeof(struct ehci_itd), sizeof(struct ehci_sitd));

	return pci_register_driver(&ehci_pci_driver);
}
module_init(ehci_hcd_pci_init);

static void __exit ehci_hcd_pci_cleanup(void)
{
	pci_unregister_driver(&ehci_pci_driver);
}
module_exit(ehci_hcd_pci_cleanup);
Commit	Line	Data
7ff71d6a MP	1	/*
	2	* EHCI HCD (Host Controller Driver) PCI Bus Glue.
	3	*
	4	* Copyright (c) 2000-2004 by David Brownell
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	13	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	14	* for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software Foundation,
	18	* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*/
	20
	21	#ifndef CONFIG_PCI
	22	#error "This file is PCI bus glue. CONFIG_PCI must be defined."
	23	#endif
	24
	25	/-------------------------------------------------------------------------/
	26
18807521 DB	27	/* called after powerup, by probe or system-pm "wakeup" */
	28	static int ehci_pci_reinit(struct ehci_hcd ehci, struct pci_dev pdev)
	29	{
	30	u32 temp;
	31	int retval;
18807521 DB	32
	33	/* optional debug port, normally in the first BAR */
	34	temp = pci_find_capability(pdev, 0x0a);
	35	if (temp) {
	36	pci_read_config_dword(pdev, temp, &temp);
	37	temp >>= 16;
	38	if ((temp & (3 << 13)) == (1 << 13)) {
	39	temp &= 0x1fff;
	40	ehci->debug = ehci_to_hcd(ehci)->regs + temp;
	41	temp = readl(&ehci->debug->control);
	42	ehci_info(ehci, "debug port %d%s\n",
	43	HCS_DEBUG_PORT(ehci->hcs_params),
	44	(temp & DBGP_ENABLED)
	45	? " IN USE"
	46	: "");
	47	if (!(temp & DBGP_ENABLED))
	48	ehci->debug = NULL;
	49	}
	50	}
	51
401feafa DB	52	/* we expect static quirk code to handle the "extended capabilities"
	53	* (currently just BIOS handoff) allowed starting with EHCI 0.96
	54	*/
18807521 DB	55
	56	/* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
	57	retval = pci_set_mwi(pdev);
	58	if (!retval)
	59	ehci_dbg(ehci, "MWI active\n");
	60
	61	ehci_port_power(ehci, 0);
	62
	63	return 0;
	64	}
	65
8926bfa7 DB	66	/* called during probe() after chip reset completes */
8926bfa7 DB	67	static int ehci_pci_setup(struct usb_hcd *hcd)
7ff71d6a	68	{
abcc9448 DB	69	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
abcc9448 DB	70	struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
7ff71d6a	71	u32 temp;
18807521	72	int retval;
7ff71d6a MP	73
7ff71d6a MP	74	ehci->caps = hcd->regs;
abcc9448 DB	75	ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
	76	dbg_hcs_params(ehci, "reset");
	77	dbg_hcc_params(ehci, "reset");
7ff71d6a MP	78
7ff71d6a MP	79	/* cache this readonly data; minimize chip reads */
abcc9448	80	ehci->hcs_params = readl(&ehci->caps->hcs_params);
7ff71d6a	81
18807521 DB	82	retval = ehci_halt(ehci);
	83	if (retval)
	84	return retval;
	85
8926bfa7 DB	86	/* data structure init */
	87	retval = ehci_init(hcd);
	88	if (retval)
	89	return retval;
	90
abcc9448	91	/* NOTE: only the parts below this line are PCI-specific */
7ff71d6a	92
abcc9448 DB	93	switch (pdev->vendor) {
	94	case PCI_VENDOR_ID_TDI:
	95	if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) {
	96	ehci->is_tdi_rh_tt = 1;
	97	tdi_reset(ehci);
	98	}
	99	break;
	100	case PCI_VENDOR_ID_AMD:
	101	/* AMD8111 EHCI doesn't work, according to AMD errata */
	102	if (pdev->device == 0x7463) {
	103	ehci_info(ehci, "ignoring AMD8111 (errata)\n");
8926bfa7 DB	104	retval = -EIO;
8926bfa7 DB	105	goto done;
abcc9448 DB	106	}
	107	break;
	108	case PCI_VENDOR_ID_NVIDIA:
f8aeb3bb	109	switch (pdev->device) {
abcc9448 DB	110	/* NVidia reports that certain chips don't handle
	111	* QH, ITD, or SITD addresses above 2GB. (But TD,
	112	* data buffer, and periodic schedule are normal.)
	113	*/
abcc9448 DB	114	case 0x003c: /* MCP04 */
	115	case 0x005b: /* CK804 */
	116	case 0x00d8: /* CK8 */
	117	case 0x00e8: /* CK8S */
	118	if (pci_set_consistent_dma_mask(pdev,
	119	DMA_31BIT_MASK) < 0)
	120	ehci_warn(ehci, "can't enable NVidia "
	121	"workaround for >2GB RAM\n");
7ff71d6a	122	break;
f8aeb3bb DB	123	/* Some NForce2 chips have problems with selective suspend;
	124	* fixed in newer silicon.
	125	*/
	126	case 0x0068:
	127	pci_read_config_dword(pdev, PCI_REVISION_ID, &temp);
	128	if ((temp & 0xff) < 0xa4)
	129	ehci->no_selective_suspend = 1;
	130	break;
7ff71d6a	131	}
abcc9448 DB	132	break;
abcc9448 DB	133	}
7ff71d6a	134
7ff71d6a	135	if (ehci_is_TDI(ehci))
abcc9448	136	ehci_reset(ehci);
7ff71d6a	137
7ff71d6a MP	138	/* at least the Genesys GL880S needs fixup here */
	139	temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
	140	temp &= 0x0f;
	141	if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) {
abcc9448	142	ehci_dbg(ehci, "bogus port configuration: "
7ff71d6a MP	143	"cc=%d x pcc=%d < ports=%d\n",
	144	HCS_N_CC(ehci->hcs_params),
	145	HCS_N_PCC(ehci->hcs_params),
	146	HCS_N_PORTS(ehci->hcs_params));
	147
abcc9448 DB	148	switch (pdev->vendor) {
	149	case 0x17a0: /* GENESYS */
	150	/* GL880S: should be PORTS=2 */
	151	temp \|= (ehci->hcs_params & ~0xf);
	152	ehci->hcs_params = temp;
	153	break;
	154	case PCI_VENDOR_ID_NVIDIA:
	155	/* NF4: should be PCC=10 */
	156	break;
7ff71d6a MP	157	}
	158	}
	159
abcc9448 DB	160	/* Serial Bus Release Number is at PCI 0x60 offset */
abcc9448 DB	161	pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
7ff71d6a	162
2c1c3c4c DB	163	/* Workaround current PCI init glitch: wakeup bits aren't
	164	* being set from PCI PM capability.
	165	*/
	166	if (!device_can_wakeup(&pdev->dev)) {
	167	u16 port_wake;
	168
	169	pci_read_config_word(pdev, 0x62, &port_wake);
	170	if (port_wake & 0x0001)
	171	device_init_wakeup(&pdev->dev, 1);
	172	}
7ff71d6a	173
f8aeb3bb DB	174	#ifdef CONFIG_USB_SUSPEND
	175	/* REVISIT: the controller works fine for wakeup iff the root hub
	176	* itself is "globally" suspended, but usbcore currently doesn't
	177	* understand such things.
	178	*
	179	* System suspend currently expects to be able to suspend the entire
	180	* device tree, device-at-a-time. If we failed selective suspend
	181	* reports, system suspend would fail; so the root hub code must claim
	182	* success. That's lying to usbcore, and it matters for for runtime
	183	* PM scenarios with selective suspend and remote wakeup...
	184	*/
	185	if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
	186	ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
	187	#endif
	188
18807521	189	retval = ehci_pci_reinit(ehci, pdev);
8926bfa7 DB	190	done:
8926bfa7 DB	191	return retval;
7ff71d6a MP	192	}
	193
	194	/-------------------------------------------------------------------------/
	195
	196	#ifdef CONFIG_PM
	197
	198	/* suspend/resume, section 4.3 */
	199
f03c17fc	200	/* These routines rely on the PCI bus glue
7ff71d6a MP	201	* to handle powerdown and wakeup, and currently also on
	202	* transceivers that don't need any software attention to set up
	203	* the right sort of wakeup.
f03c17fc	204	* Also they depend on separate root hub suspend/resume.
7ff71d6a MP	205	*/
7ff71d6a MP	206
abcc9448	207	static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
7ff71d6a	208	{
abcc9448	209	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
8de98402 BH	210	unsigned long flags;
8de98402 BH	211	int rc = 0;
7ff71d6a	212
abcc9448 DB	213	if (time_before(jiffies, ehci->next_statechange))
abcc9448 DB	214	msleep(10);
7ff71d6a	215
8de98402 BH	216	/* Root hub was already suspended. Disable irq emission and
	217	* mark HW unaccessible, bail out if RH has been resumed. Use
	218	* the spinlock to properly synchronize with possible pending
	219	* RH suspend or resume activity.
	220	*
	221	* This is still racy as hcd->state is manipulated outside of
	222	* any locks =P But that will be a different fix.
	223	*/
	224	spin_lock_irqsave (&ehci->lock, flags);
	225	if (hcd->state != HC_STATE_SUSPENDED) {
	226	rc = -EINVAL;
	227	goto bail;
	228	}
	229	writel (0, &ehci->regs->intr_enable);
	230	(void)readl(&ehci->regs->intr_enable);
	231
	232	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
	233	bail:
	234	spin_unlock_irqrestore (&ehci->lock, flags);
	235
f03c17fc	236	// could save FLADJ in case of Vaux power loss
7ff71d6a MP	237	// ... we'd only use it to handle clock skew
7ff71d6a MP	238
8de98402	239	return rc;
7ff71d6a MP	240	}
7ff71d6a MP	241
abcc9448	242	static int ehci_pci_resume(struct usb_hcd *hcd)
7ff71d6a	243	{
abcc9448	244	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
7ff71d6a	245	unsigned port;
18807521	246	struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
7ff71d6a MP	247	int retval = -EINVAL;
7ff71d6a MP	248
f03c17fc	249	// maybe restore FLADJ
7ff71d6a	250
abcc9448 DB	251	if (time_before(jiffies, ehci->next_statechange))
abcc9448 DB	252	msleep(100);
7ff71d6a	253
8de98402 BH	254	/* Mark hardware accessible again as we are out of D3 state by now */
	255	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
	256
f03c17fc	257	/* If CF is clear, we lost PCI Vaux power and need to restart. */
18807521	258	if (readl(&ehci->regs->configured_flag) != FLAG_CF)
f03c17fc DB	259	goto restart;
f03c17fc DB	260
7ff71d6a MP	261	/* If any port is suspended (or owned by the companion),
7ff71d6a MP	262	* we know we can/must resume the HC (and mustn't reset it).
f03c17fc	263	* We just defer that to the root hub code.
7ff71d6a	264	*/
abcc9448	265	for (port = HCS_N_PORTS(ehci->hcs_params); port > 0; ) {
7ff71d6a MP	266	u32 status;
7ff71d6a MP	267	port--;
abcc9448	268	status = readl(&ehci->regs->port_status [port]);
7ff71d6a MP	269	if (!(status & PORT_POWER))
7ff71d6a MP	270	continue;
f03c17fc DB	271	if (status & (PORT_SUSPEND \| PORT_RESUME \| PORT_OWNER)) {
	272	usb_hcd_resume_root_hub(hcd);
	273	return 0;
7ff71d6a	274	}
f03c17fc DB	275	}
	276
	277	restart:
	278	ehci_dbg(ehci, "lost power, restarting\n");
1c50c317	279	usb_root_hub_lost_power(hcd->self.root_hub);
7ff71d6a MP	280
7ff71d6a MP	281	/* Else reset, to cope with power loss or flush-to-storage
f03c17fc	282	* style "resume" having let BIOS kick in during reboot.
7ff71d6a	283	*/
abcc9448 DB	284	(void) ehci_halt(ehci);
abcc9448 DB	285	(void) ehci_reset(ehci);
18807521	286	(void) ehci_pci_reinit(ehci, pdev);
f03c17fc DB	287
f03c17fc DB	288	/* emptying the schedule aborts any urbs */
abcc9448	289	spin_lock_irq(&ehci->lock);
f03c17fc DB	290	if (ehci->reclaim)
f03c17fc DB	291	ehci->reclaim_ready = 1;
abcc9448 DB	292	ehci_work(ehci, NULL);
abcc9448 DB	293	spin_unlock_irq(&ehci->lock);
f03c17fc DB	294
f03c17fc DB	295	/* restart; khubd will disconnect devices */
abcc9448	296	retval = ehci_run(hcd);
f03c17fc	297
18807521	298	/* here we "know" root ports should always stay powered */
abcc9448	299	ehci_port_power(ehci, 1);
7ff71d6a MP	300
	301	return retval;
	302	}
	303	#endif
	304
	305	static const struct hc_driver ehci_pci_hc_driver = {
	306	.description = hcd_name,
	307	.product_desc = "EHCI Host Controller",
	308	.hcd_priv_size = sizeof(struct ehci_hcd),
	309
	310	/*
	311	* generic hardware linkage
	312	*/
	313	.irq = ehci_irq,
	314	.flags = HCD_MEMORY \| HCD_USB2,
	315
	316	/*
	317	* basic lifecycle operations
	318	*/
8926bfa7	319	.reset = ehci_pci_setup,
18807521	320	.start = ehci_run,
7ff71d6a MP	321	#ifdef CONFIG_PM
	322	.suspend = ehci_pci_suspend,
	323	.resume = ehci_pci_resume,
	324	#endif
18807521	325	.stop = ehci_stop,
7ff71d6a MP	326
	327	/*
	328	* managing i/o requests and associated device resources
	329	*/
	330	.urb_enqueue = ehci_urb_enqueue,
	331	.urb_dequeue = ehci_urb_dequeue,
	332	.endpoint_disable = ehci_endpoint_disable,
	333
	334	/*
	335	* scheduling support
	336	*/
	337	.get_frame_number = ehci_get_frame,
	338
	339	/*
	340	* root hub support
	341	*/
	342	.hub_status_data = ehci_hub_status_data,
	343	.hub_control = ehci_hub_control,
0c0382e3 AS	344	.bus_suspend = ehci_bus_suspend,
0c0382e3 AS	345	.bus_resume = ehci_bus_resume,
7ff71d6a MP	346	};
	347
	348	/-------------------------------------------------------------------------/
	349
	350	/* PCI driver selection metadata; PCI hotplugging uses this */
	351	static const struct pci_device_id pci_ids [] = { {
	352	/* handle any USB 2.0 EHCI controller */
c67808ee	353	PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
7ff71d6a MP	354	.driver_data = (unsigned long) &ehci_pci_hc_driver,
	355	},
	356	{ /* end: all zeroes */ }
	357	};
abcc9448	358	MODULE_DEVICE_TABLE(pci, pci_ids);
7ff71d6a MP	359
	360	/* pci driver glue; this is a "new style" PCI driver module */
	361	static struct pci_driver ehci_pci_driver = {
	362	.name = (char *) hcd_name,
	363	.id_table = pci_ids,
	364
	365	.probe = usb_hcd_pci_probe,
	366	.remove = usb_hcd_pci_remove,
	367
	368	#ifdef CONFIG_PM
	369	.suspend = usb_hcd_pci_suspend,
	370	.resume = usb_hcd_pci_resume,
	371	#endif
	372	};
	373
abcc9448	374	static int __init ehci_hcd_pci_init(void)
7ff71d6a MP	375	{
	376	if (usb_disabled())
	377	return -ENODEV;
	378
abcc9448	379	pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
7ff71d6a	380	hcd_name,
abcc9448 DB	381	sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
abcc9448 DB	382	sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
7ff71d6a	383
abcc9448	384	return pci_register_driver(&ehci_pci_driver);
7ff71d6a	385	}
abcc9448	386	module_init(ehci_hcd_pci_init);
7ff71d6a	387
abcc9448	388	static void __exit ehci_hcd_pci_cleanup(void)
7ff71d6a	389	{
abcc9448	390	pci_unregister_driver(&ehci_pci_driver);
7ff71d6a	391	}
abcc9448	392	module_exit(ehci_hcd_pci_cleanup);