Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 643 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
new file mode 100644
index 000000000000..e2fc4129dfc6
--- /dev/null
+++ b/drivers/usb/host/ohci-hub.c
@@ -0,0 +1,643 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ * 
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
+ * 
+ * This file is licenced under GPL
+ */
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * OHCI Root Hub ... the nonsharable stuff
+ */
+
+#define dbg_port(hc,label,num,value) \
+	ohci_dbg (hc, \
+		"%s roothub.portstatus [%d] " \
+		"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
+		label, num, temp, \
+		(temp & RH_PS_PRSC) ? " PRSC" : "", \
+		(temp & RH_PS_OCIC) ? " OCIC" : "", \
+		(temp & RH_PS_PSSC) ? " PSSC" : "", \
+		(temp & RH_PS_PESC) ? " PESC" : "", \
+		(temp & RH_PS_CSC) ? " CSC" : "", \
+ 		\
+		(temp & RH_PS_LSDA) ? " LSDA" : "", \
+		(temp & RH_PS_PPS) ? " PPS" : "", \
+		(temp & RH_PS_PRS) ? " PRS" : "", \
+		(temp & RH_PS_POCI) ? " POCI" : "", \
+		(temp & RH_PS_PSS) ? " PSS" : "", \
+ 		\
+		(temp & RH_PS_PES) ? " PES" : "", \
+		(temp & RH_PS_CCS) ? " CCS" : "" \
+		);
+
+/*-------------------------------------------------------------------------*/
+
+#if	defined(CONFIG_USB_SUSPEND) || defined(CONFIG_PM)
+
+#define OHCI_SCHED_ENABLES \
+	(OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
+
+static void dl_done_list (struct ohci_hcd *, struct pt_regs *);
+static void finish_unlinks (struct ohci_hcd *, u16 , struct pt_regs *);
+static int ohci_restart (struct ohci_hcd *ohci);
+
+static int ohci_hub_suspend (struct usb_hcd *hcd)
+{
+	struct ohci_hcd		*ohci = hcd_to_ohci (hcd);
+	int			status = 0;
+	unsigned long		flags;
+
+	spin_lock_irqsave (&ohci->lock, flags);
+
+	ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
+	switch (ohci->hc_control & OHCI_CTRL_HCFS) {
+	case OHCI_USB_RESUME:
+		ohci_dbg (ohci, "resume/suspend?\n");
+		ohci->hc_control &= ~OHCI_CTRL_HCFS;
+		ohci->hc_control |= OHCI_USB_RESET;
+		ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+		(void) ohci_readl (ohci, &ohci->regs->control);
+		/* FALL THROUGH */
+	case OHCI_USB_RESET:
+		status = -EBUSY;
+		ohci_dbg (ohci, "needs reinit!\n");
+		goto done;
+	case OHCI_USB_SUSPEND:
+		ohci_dbg (ohci, "already suspended\n");
+		goto done;
+	}
+	ohci_dbg (ohci, "suspend root hub\n");
+
+	/* First stop any processing */
+	hcd->state = HC_STATE_QUIESCING;
+	if (ohci->hc_control & OHCI_SCHED_ENABLES) {
+		int		limit;
+
+		ohci->hc_control &= ~OHCI_SCHED_ENABLES;
+		ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+		ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
+		ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus);
+
+		/* sched disables take effect on the next frame,
+		 * then the last WDH could take 6+ msec
+		 */
+		ohci_dbg (ohci, "stopping schedules ...\n");
+		limit = 2000;
+		while (limit > 0) {
+			udelay (250);
+			limit =- 250;
+			if (ohci_readl (ohci, &ohci->regs->intrstatus)
+					& OHCI_INTR_SF)
+				break;
+		}
+		dl_done_list (ohci, NULL);
+		mdelay (7);
+	}
+	dl_done_list (ohci, NULL);
+	finish_unlinks (ohci, ohci_frame_no(ohci), NULL);
+	ohci_writel (ohci, ohci_readl (ohci, &ohci->regs->intrstatus),
+			&ohci->regs->intrstatus);
+
+	/* maybe resume can wake root hub */
+	if (hcd->remote_wakeup)
+		ohci->hc_control |= OHCI_CTRL_RWE;
+	else
+		ohci->hc_control &= ~OHCI_CTRL_RWE;
+
+	/* Suspend hub */
+	ohci->hc_control &= ~OHCI_CTRL_HCFS;
+	ohci->hc_control |= OHCI_USB_SUSPEND;
+	ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+	(void) ohci_readl (ohci, &ohci->regs->control);
+
+	/* no resumes until devices finish suspending */
+	ohci->next_statechange = jiffies + msecs_to_jiffies (5);
+
+done:
+	if (status == 0)
+		hcd->state = HC_STATE_SUSPENDED;
+	spin_unlock_irqrestore (&ohci->lock, flags);
+	return status;
+}
+
+static inline struct ed *find_head (struct ed *ed)
+{
+	/* for bulk and control lists */
+	while (ed->ed_prev)
+		ed = ed->ed_prev;
+	return ed;
+}
+
+/* caller has locked the root hub */
+static int ohci_hub_resume (struct usb_hcd *hcd)
+{
+	struct ohci_hcd		*ohci = hcd_to_ohci (hcd);
+	u32			temp, enables;
+	int			status = -EINPROGRESS;
+
+	if (time_before (jiffies, ohci->next_statechange))
+		msleep(5);
+
+	spin_lock_irq (&ohci->lock);
+	ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
+
+	if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
+		/* this can happen after suspend-to-disk */
+		if (hcd->state == HC_STATE_RESUMING) {
+			ohci_dbg (ohci, "BIOS/SMM active, control %03x\n",
+					ohci->hc_control);
+			status = -EBUSY;
+		/* this happens when pmcore resumes HC then root */
+		} else {
+			ohci_dbg (ohci, "duplicate resume\n");
+			status = 0;
+		}
+	} else switch (ohci->hc_control & OHCI_CTRL_HCFS) {
+	case OHCI_USB_SUSPEND:
+		ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES);
+		ohci->hc_control |= OHCI_USB_RESUME;
+		ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+		(void) ohci_readl (ohci, &ohci->regs->control);
+		ohci_dbg (ohci, "resume root hub\n");
+		break;
+	case OHCI_USB_RESUME:
+		/* HCFS changes sometime after INTR_RD */
+		ohci_info (ohci, "wakeup\n");
+		break;
+	case OHCI_USB_OPER:
+		ohci_dbg (ohci, "already resumed\n");
+		status = 0;
+		break;
+	default:		/* RESET, we lost power */
+		ohci_dbg (ohci, "root hub hardware reset\n");
+		status = -EBUSY;
+	}
+	spin_unlock_irq (&ohci->lock);
+	if (status == -EBUSY) {
+		(void) ohci_init (ohci);
+		return ohci_restart (ohci);
+	}
+	if (status != -EINPROGRESS)
+		return status;
+
+	temp = roothub_a (ohci) & RH_A_NDP;
+	enables = 0;
+	while (temp--) {
+		u32 stat = ohci_readl (ohci,
+				       &ohci->regs->roothub.portstatus [temp]);
+
+		/* force global, not selective, resume */
+		if (!(stat & RH_PS_PSS))
+			continue;
+		ohci_writel (ohci, RH_PS_POCI,
+				&ohci->regs->roothub.portstatus [temp]);
+	}
+
+	/* Some controllers (lucent erratum) need extra-long delays */
+	hcd->state = HC_STATE_RESUMING;
+	mdelay (20 /* usb 11.5.1.10 */ + 15);
+
+	temp = ohci_readl (ohci, &ohci->regs->control);
+	temp &= OHCI_CTRL_HCFS;
+	if (temp != OHCI_USB_RESUME) {
+		ohci_err (ohci, "controller won't resume\n");
+		return -EBUSY;
+	}
+
+	/* disable old schedule state, reinit from scratch */
+	ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
+	ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent);
+	ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
+	ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent);
+	ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent);
+	ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
+
+	/* Sometimes PCI D3 suspend trashes frame timings ... */
+	periodic_reinit (ohci);
+
+	/* interrupts might have been disabled */
+	ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable);
+	if (ohci->ed_rm_list)
+		ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable);
+	ohci_writel (ohci, ohci_readl (ohci, &ohci->regs->intrstatus),
+			&ohci->regs->intrstatus);
+
+	/* Then re-enable operations */
+	ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control);
+	(void) ohci_readl (ohci, &ohci->regs->control);
+	msleep (3);
+
+	temp = OHCI_CONTROL_INIT | OHCI_USB_OPER;
+	if (hcd->can_wakeup)
+		temp |= OHCI_CTRL_RWC;
+	ohci->hc_control = temp;
+	ohci_writel (ohci, temp, &ohci->regs->control);
+	(void) ohci_readl (ohci, &ohci->regs->control);
+
+	/* TRSMRCY */
+	msleep (10);
+
+	/* keep it alive for ~5x suspend + resume costs */
+	ohci->next_statechange = jiffies + msecs_to_jiffies (250);
+
+	/* maybe turn schedules back on */
+	enables = 0;
+	temp = 0;
+	if (!ohci->ed_rm_list) {
+		if (ohci->ed_controltail) {
+			ohci_writel (ohci,
+					find_head (ohci->ed_controltail)->dma,
+					&ohci->regs->ed_controlhead);
+			enables |= OHCI_CTRL_CLE;
+			temp |= OHCI_CLF;
+		}
+		if (ohci->ed_bulktail) {
+			ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma,
+				&ohci->regs->ed_bulkhead);
+			enables |= OHCI_CTRL_BLE;
+			temp |= OHCI_BLF;
+		}
+	}
+	if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs)
+		enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
+	if (enables) {
+		ohci_dbg (ohci, "restarting schedules ... %08x\n", enables);
+		ohci->hc_control |= enables;
+		ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+		if (temp)
+			ohci_writel (ohci, temp, &ohci->regs->cmdstatus);
+		(void) ohci_readl (ohci, &ohci->regs->control);
+	}
+
+	hcd->state = HC_STATE_RUNNING;
+	return 0;
+}
+
+static void ohci_rh_resume (void *_hcd)
+{
+	struct usb_hcd	*hcd = _hcd;
+
+	usb_lock_device (hcd->self.root_hub);
+	(void) ohci_hub_resume (hcd);
+	usb_unlock_device (hcd->self.root_hub);
+}
+
+#else
+
+static void ohci_rh_resume (void *_hcd)
+{
+	struct ohci_hcd	*ohci = hcd_to_ohci (_hcd);
+	ohci_dbg(ohci, "rh_resume ??\n");
+}
+
+#endif	/* CONFIG_USB_SUSPEND || CONFIG_PM */
+
+/*-------------------------------------------------------------------------*/
+
+/* build "status change" packet (one or two bytes) from HC registers */
+
+static int
+ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
+{
+	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
+	int		ports, i, changed = 0, length = 1;
+	int		can_suspend = hcd->can_wakeup;
+	unsigned long	flags;
+
+	spin_lock_irqsave (&ohci->lock, flags);
+
+	/* handle autosuspended root:  finish resuming before
+	 * letting khubd or root hub timer see state changes.
+	 */
+	if ((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER
+			|| !HC_IS_RUNNING(hcd->state)) {
+		can_suspend = 0;
+		goto done;
+	}
+
+	ports = roothub_a (ohci) & RH_A_NDP; 
+	if (ports > MAX_ROOT_PORTS) {
+		ohci_err (ohci, "bogus NDP=%d, rereads as NDP=%d\n", ports,
+			  ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP);
+		/* retry later; "should not happen" */
+		goto done;
+	}
+
+	/* init status */
+	if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC))
+		buf [0] = changed = 1;
+	else
+		buf [0] = 0;
+	if (ports > 7) {
+		buf [1] = 0;
+		length++;
+	}
+
+	/* look at each port */
+	for (i = 0; i < ports; i++) {
+		u32	status = roothub_portstatus (ohci, i);
+
+		if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
+				| RH_PS_OCIC | RH_PS_PRSC)) {
+			changed = 1;
+			if (i < 7)
+			    buf [0] |= 1 << (i + 1);
+			else
+			    buf [1] |= 1 << (i - 7);
+			continue;
+		}
+
+		/* can suspend if no ports are enabled; or if all all
+		 * enabled ports are suspended AND remote wakeup is on.
+		 */
+		if (!(status & RH_PS_CCS))
+			continue;
+		if ((status & RH_PS_PSS) && hcd->remote_wakeup)
+			continue;
+		can_suspend = 0;
+	}
+done:
+	spin_unlock_irqrestore (&ohci->lock, flags);
+
+#ifdef CONFIG_PM
+	/* save power by suspending idle root hubs;
+	 * INTR_RD wakes us when there's work
+	 * NOTE: if we can do this, we don't need a root hub timer!
+	 */
+	if (can_suspend
+			&& !changed
+			&& !ohci->ed_rm_list
+			&& ((OHCI_CTRL_HCFS | OHCI_SCHED_ENABLES)
+					& ohci->hc_control)
+				== OHCI_USB_OPER
+			&& time_after (jiffies, ohci->next_statechange)
+			&& usb_trylock_device (hcd->self.root_hub)
+			) {
+		ohci_vdbg (ohci, "autosuspend\n");
+		(void) ohci_hub_suspend (hcd);
+		hcd->state = HC_STATE_RUNNING;
+		usb_unlock_device (hcd->self.root_hub);
+	}
+#endif
+
+	return changed ? length : 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void
+ohci_hub_descriptor (
+	struct ohci_hcd			*ohci,
+	struct usb_hub_descriptor	*desc
+) {
+	u32		rh = roothub_a (ohci);
+	int		ports = rh & RH_A_NDP; 
+	u16		temp;
+
+	desc->bDescriptorType = 0x29;
+	desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24;
+	desc->bHubContrCurrent = 0;
+
+	desc->bNbrPorts = ports;
+	temp = 1 + (ports / 8);
+	desc->bDescLength = 7 + 2 * temp;
+
+	temp = 0;
+	if (rh & RH_A_NPS)		/* no power switching? */
+	    temp |= 0x0002;
+	if (rh & RH_A_PSM) 		/* per-port power switching? */
+	    temp |= 0x0001;
+	if (rh & RH_A_NOCP)		/* no overcurrent reporting? */
+	    temp |= 0x0010;
+	else if (rh & RH_A_OCPM)	/* per-port overcurrent reporting? */
+	    temp |= 0x0008;
+	desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ohci, temp);
+
+	/* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
+	rh = roothub_b (ohci);
+	desc->bitmap [0] = rh & RH_B_DR;
+	if (ports > 7) {
+		desc->bitmap [1] = (rh & RH_B_DR) >> 8;
+		desc->bitmap [2] = desc->bitmap [3] = 0xff;
+	} else
+		desc->bitmap [1] = 0xff;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef	CONFIG_USB_OTG
+
+static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port)
+{
+	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
+	u32			status;
+
+	if (!port)
+		return -EINVAL;
+	port--;
+
+	/* start port reset before HNP protocol times out */
+	status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]);
+	if (!(status & RH_PS_CCS))
+		return -ENODEV;
+
+	/* khubd will finish the reset later */
+	ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]);
+	return 0;
+}
+
+static void start_hnp(struct ohci_hcd *ohci);
+
+#else
+
+#define	ohci_start_port_reset		NULL
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+
+/* See usb 7.1.7.5:  root hubs must issue at least 50 msec reset signaling,
+ * not necessarily continuous ... to guard against resume signaling.
+ * The short timeout is safe for non-root hubs, and is backward-compatible
+ * with earlier Linux hosts.
+ */
+#ifdef	CONFIG_USB_SUSPEND
+#define	PORT_RESET_MSEC		50
+#else
+#define	PORT_RESET_MSEC		10
+#endif
+
+/* this timer value might be vendor-specific ... */
+#define	PORT_RESET_HW_MSEC	10
+
+/* wrap-aware logic morphed from <linux/jiffies.h> */
+#define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
+
+/* called from some task, normally khubd */
+static inline void root_port_reset (struct ohci_hcd *ohci, unsigned port)
+{
+	__hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port];
+	u32	temp;
+	u16	now = ohci_readl(ohci, &ohci->regs->fmnumber);
+	u16	reset_done = now + PORT_RESET_MSEC;
+
+	/* build a "continuous enough" reset signal, with up to
+	 * 3msec gap between pulses.  scheduler HZ==100 must work;
+	 * this might need to be deadline-scheduled.
+	 */
+	do {
+		/* spin until any current reset finishes */
+		for (;;) {
+			temp = ohci_readl (ohci, portstat);
+			if (!(temp & RH_PS_PRS))
+				break;
+			udelay (500);
+		} 
+
+		if (!(temp & RH_PS_CCS))
+			break;
+		if (temp & RH_PS_PRSC)
+			ohci_writel (ohci, RH_PS_PRSC, portstat);
+
+		/* start the next reset, sleep till it's probably done */
+		ohci_writel (ohci, RH_PS_PRS, portstat);
+		msleep(PORT_RESET_HW_MSEC);
+		now = ohci_readl(ohci, &ohci->regs->fmnumber);
+	} while (tick_before(now, reset_done));
+	/* caller synchronizes using PRSC */
+}
+
+static int ohci_hub_control (
+	struct usb_hcd	*hcd,
+	u16		typeReq,
+	u16		wValue,
+	u16		wIndex,
+	char		*buf,
+	u16		wLength
+) {
+	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
+	int		ports = hcd_to_bus (hcd)->root_hub->maxchild;
+	u32		temp;
+	int		retval = 0;
+
+	switch (typeReq) {
+	case ClearHubFeature:
+		switch (wValue) {
+		case C_HUB_OVER_CURRENT:
+			ohci_writel (ohci, RH_HS_OCIC,
+					&ohci->regs->roothub.status);
+		case C_HUB_LOCAL_POWER:
+			break;
+		default:
+			goto error;
+		}
+		break;
+	case ClearPortFeature:
+		if (!wIndex || wIndex > ports)
+			goto error;
+		wIndex--;
+
+		switch (wValue) {
+		case USB_PORT_FEAT_ENABLE:
+			temp = RH_PS_CCS;
+			break;
+		case USB_PORT_FEAT_C_ENABLE:
+			temp = RH_PS_PESC;
+			break;
+		case USB_PORT_FEAT_SUSPEND:
+			temp = RH_PS_POCI;
+			if ((ohci->hc_control & OHCI_CTRL_HCFS)
+					!= OHCI_USB_OPER)
+				schedule_work (&ohci->rh_resume);
+			break;
+		case USB_PORT_FEAT_C_SUSPEND:
+			temp = RH_PS_PSSC;
+			break;
+		case USB_PORT_FEAT_POWER:
+			temp = RH_PS_LSDA;
+			break;
+		case USB_PORT_FEAT_C_CONNECTION:
+			temp = RH_PS_CSC;
+			break;
+		case USB_PORT_FEAT_C_OVER_CURRENT:
+			temp = RH_PS_OCIC;
+			break;
+		case USB_PORT_FEAT_C_RESET:
+			temp = RH_PS_PRSC;
+			break;
+		default:
+			goto error;
+		}
+		ohci_writel (ohci, temp,
+				&ohci->regs->roothub.portstatus [wIndex]);
+		// ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]);
+		break;
+	case GetHubDescriptor:
+		ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf);
+		break;
+	case GetHubStatus:
+		temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE);
+		*(__le32 *) buf = cpu_to_le32 (temp);
+		break;
+	case GetPortStatus:
+		if (!wIndex || wIndex > ports)
+			goto error;
+		wIndex--;
+		temp = roothub_portstatus (ohci, wIndex);
+		*(__le32 *) buf = cpu_to_le32 (temp);
+
+#ifndef	OHCI_VERBOSE_DEBUG
+	if (*(u16*)(buf+2))	/* only if wPortChange is interesting */
+#endif
+		dbg_port (ohci, "GetStatus", wIndex, temp);
+		break;
+	case SetHubFeature:
+		switch (wValue) {
+		case C_HUB_OVER_CURRENT:
+			// FIXME:  this can be cleared, yes?
+		case C_HUB_LOCAL_POWER:
+			break;
+		default:
+			goto error;
+		}
+		break;
+	case SetPortFeature:
+		if (!wIndex || wIndex > ports)
+			goto error;
+		wIndex--;
+		switch (wValue) {
+		case USB_PORT_FEAT_SUSPEND:
+#ifdef	CONFIG_USB_OTG
+			if (hcd->self.otg_port == (wIndex + 1)
+					&& hcd->self.b_hnp_enable)
+				start_hnp(ohci);
+			else
+#endif
+			ohci_writel (ohci, RH_PS_PSS,
+				&ohci->regs->roothub.portstatus [wIndex]);
+			break;
+		case USB_PORT_FEAT_POWER:
+			ohci_writel (ohci, RH_PS_PPS,
+				&ohci->regs->roothub.portstatus [wIndex]);
+			break;
+		case USB_PORT_FEAT_RESET:
+			root_port_reset (ohci, wIndex);
+			break;
+		default:
+			goto error;
+		}
+		break;
+
+	default:
+error:
+		/* "protocol stall" on error */
+		retval = -EPIPE;
+	}
+	return retval;
+}
+