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!
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
new file mode 100644
index 0000000..e2fc412
--- /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;
+}
+