zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/usb/host/ohci-hcd.c b/ap/os/linux/linux-3.4.x/drivers/usb/host/ohci-hcd.c
new file mode 100644
index 0000000..0157357
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/usb/host/ohci-hcd.c
@@ -0,0 +1,1309 @@
+/*
+ * Open Host Controller Interface (OHCI) driver for USB.
+ *
+ * Maintainer: Alan Stern <stern@rowland.harvard.edu>
+ *
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
+ *
+ * [ Initialisation is based on Linus' ]
+ * [ uhci code and gregs ohci fragments ]
+ * [ (C) Copyright 1999 Linus Torvalds ]
+ * [ (C) Copyright 1999 Gregory P. Smith]
+ *
+ *
+ * OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller
+ * interfaces (though some non-x86 Intel chips use it). It supports
+ * smarter hardware than UHCI. A download link for the spec available
+ * through the http://www.usb.org website.
+ *
+ * This file is licenced under the GPL.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/usb.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/hcd.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/workqueue.h>
+#include <linux/debugfs.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/unaligned.h>
+#include <asm/byteorder.h>
+
+
+#define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
+#define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
+
+/*-------------------------------------------------------------------------*/
+
+#undef OHCI_VERBOSE_DEBUG /* not always helpful */
+
+/* For initializing controller (mask in an HCFS mode too) */
+#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
+#define OHCI_INTR_INIT \
+ (OHCI_INTR_MIE | OHCI_INTR_RHSC | OHCI_INTR_UE \
+ | OHCI_INTR_RD | OHCI_INTR_WDH)
+
+#ifdef __hppa__
+/* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
+#define IR_DISABLE
+#endif
+
+#ifdef CONFIG_ARCH_OMAP
+/* OMAP doesn't support IR (no SMM; not needed) */
+#define IR_DISABLE
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+static const char hcd_name [] = "ohci_hcd";
+
+#define STATECHANGE_DELAY msecs_to_jiffies(300)
+
+#include "ohci.h"
+#include "pci-quirks.h"
+
+static void ohci_dump (struct ohci_hcd *ohci, int verbose);
+static int ohci_init (struct ohci_hcd *ohci);
+static void ohci_stop (struct usb_hcd *hcd);
+
+#if defined(CONFIG_PM) || defined(CONFIG_PCI)
+static int ohci_restart (struct ohci_hcd *ohci);
+#endif
+
+#ifdef CONFIG_PCI
+static void sb800_prefetch(struct ohci_hcd *ohci, int on);
+#else
+static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
+{
+ return;
+}
+#endif
+
+
+#include "ohci-hub.c"
+#include "ohci-dbg.c"
+#include "ohci-mem.c"
+#include "ohci-q.c"
+
+
+/*
+ * On architectures with edge-triggered interrupts we must never return
+ * IRQ_NONE.
+ */
+#if defined(CONFIG_SA1111) /* ... or other edge-triggered systems */
+#define IRQ_NOTMINE IRQ_HANDLED
+#else
+#define IRQ_NOTMINE IRQ_NONE
+#endif
+
+
+/* Some boards misreport power switching/overcurrent */
+static bool distrust_firmware = 1;
+module_param (distrust_firmware, bool, 0);
+MODULE_PARM_DESC (distrust_firmware,
+ "true to distrust firmware power/overcurrent setup");
+
+/* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */
+static bool no_handshake = 0;
+module_param (no_handshake, bool, 0);
+MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * queue up an urb for anything except the root hub
+ */
+static int ohci_urb_enqueue (
+ struct usb_hcd *hcd,
+ struct urb *urb,
+ gfp_t mem_flags
+) {
+ struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+ struct ed *ed;
+ urb_priv_t *urb_priv;
+ unsigned int pipe = urb->pipe;
+ int i, size = 0;
+ unsigned long flags;
+ int retval = 0;
+
+#ifdef OHCI_VERBOSE_DEBUG
+ urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
+#endif
+
+ /* every endpoint has a ed, locate and maybe (re)initialize it */
+ if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
+ return -ENOMEM;
+
+ /* for the private part of the URB we need the number of TDs (size) */
+ switch (ed->type) {
+ case PIPE_CONTROL:
+ /* td_submit_urb() doesn't yet handle these */
+ if (urb->transfer_buffer_length > 4096)
+ return -EMSGSIZE;
+
+ /* 1 TD for setup, 1 for ACK, plus ... */
+ size = 2;
+ /* FALLTHROUGH */
+ // case PIPE_INTERRUPT:
+ // case PIPE_BULK:
+ default:
+ /* one TD for every 4096 Bytes (can be up to 8K) */
+ size += urb->transfer_buffer_length / 4096;
+ /* ... and for any remaining bytes ... */
+ if ((urb->transfer_buffer_length % 4096) != 0)
+ size++;
+ /* ... and maybe a zero length packet to wrap it up */
+ if (size == 0)
+ size++;
+ else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
+ && (urb->transfer_buffer_length
+ % usb_maxpacket (urb->dev, pipe,
+ usb_pipeout (pipe))) == 0)
+ size++;
+ break;
+ case PIPE_ISOCHRONOUS: /* number of packets from URB */
+ size = urb->number_of_packets;
+ break;
+ }
+
+ /* allocate the private part of the URB */
+ urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
+ mem_flags);
+ if (!urb_priv)
+ return -ENOMEM;
+ INIT_LIST_HEAD (&urb_priv->pending);
+ urb_priv->length = size;
+ urb_priv->ed = ed;
+
+ /* allocate the TDs (deferring hash chain updates) */
+ for (i = 0; i < size; i++) {
+ urb_priv->td [i] = td_alloc (ohci, mem_flags);
+ if (!urb_priv->td [i]) {
+ urb_priv->length = i;
+ urb_free_priv (ohci, urb_priv);
+ return -ENOMEM;
+ }
+ }
+
+ spin_lock_irqsave (&ohci->lock, flags);
+
+ /* don't submit to a dead HC */
+ if (!HCD_HW_ACCESSIBLE(hcd)) {
+ retval = -ENODEV;
+ goto fail;
+ }
+ if (ohci->rh_state != OHCI_RH_RUNNING) {
+ retval = -ENODEV;
+ goto fail;
+ }
+ retval = usb_hcd_link_urb_to_ep(hcd, urb);
+ if (retval)
+ goto fail;
+
+ /* schedule the ed if needed */
+ if (ed->state == ED_IDLE) {
+ retval = ed_schedule (ohci, ed);
+ if (retval < 0) {
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+ goto fail;
+ }
+ if (ed->type == PIPE_ISOCHRONOUS) {
+ u16 frame = ohci_frame_no(ohci);
+
+ /* delay a few frames before the first TD */
+ frame += max_t (u16, 8, ed->interval);
+ frame &= ~(ed->interval - 1);
+ frame |= ed->branch;
+ urb->start_frame = frame;
+
+ /* yes, only URB_ISO_ASAP is supported, and
+ * urb->start_frame is never used as input.
+ */
+ }
+ } else if (ed->type == PIPE_ISOCHRONOUS)
+ urb->start_frame = ed->last_iso + ed->interval;
+
+ /* fill the TDs and link them to the ed; and
+ * enable that part of the schedule, if needed
+ * and update count of queued periodic urbs
+ */
+ urb->hcpriv = urb_priv;
+ td_submit_urb (ohci, urb);
+
+fail:
+ if (retval)
+ urb_free_priv (ohci, urb_priv);
+ spin_unlock_irqrestore (&ohci->lock, flags);
+ return retval;
+}
+
+/*
+ * decouple the URB from the HC queues (TDs, urb_priv).
+ * reporting is always done
+ * asynchronously, and we might be dealing with an urb that's
+ * partially transferred, or an ED with other urbs being unlinked.
+ */
+static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+ unsigned long flags;
+ int rc;
+
+#ifdef OHCI_VERBOSE_DEBUG
+ urb_print(urb, "UNLINK", 1, status);
+#endif
+
+ spin_lock_irqsave (&ohci->lock, flags);
+ rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+ if (rc) {
+ ; /* Do nothing */
+ } else if (ohci->rh_state == OHCI_RH_RUNNING) {
+ urb_priv_t *urb_priv;
+
+ /* Unless an IRQ completed the unlink while it was being
+ * handed to us, flag it for unlink and giveback, and force
+ * some upcoming INTR_SF to call finish_unlinks()
+ */
+ urb_priv = urb->hcpriv;
+ if (urb_priv) {
+ if (urb_priv->ed->state == ED_OPER)
+ start_ed_unlink (ohci, urb_priv->ed);
+ }
+ } else {
+ /*
+ * with HC dead, we won't respect hc queue pointers
+ * any more ... just clean up every urb's memory.
+ */
+ if (urb->hcpriv)
+ finish_urb(ohci, urb, status);
+ }
+ spin_unlock_irqrestore (&ohci->lock, flags);
+ return rc;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* frees config/altsetting state for endpoints,
+ * including ED memory, dummy TD, and bulk/intr data toggle
+ */
+
+static void
+ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+ unsigned long flags;
+ struct ed *ed = ep->hcpriv;
+ unsigned limit = 1000;
+
+ /* ASSERT: any requests/urbs are being unlinked */
+ /* ASSERT: nobody can be submitting urbs for this any more */
+
+ if (!ed)
+ return;
+
+rescan:
+ spin_lock_irqsave (&ohci->lock, flags);
+
+ if (ohci->rh_state != OHCI_RH_RUNNING) {
+sanitize:
+ ed->state = ED_IDLE;
+ if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
+ ohci->eds_scheduled--;
+ finish_unlinks (ohci, 0);
+ }
+
+ switch (ed->state) {
+ case ED_UNLINK: /* wait for hw to finish? */
+ /* major IRQ delivery trouble loses INTR_SF too... */
+ if (limit-- == 0) {
+ ohci_warn(ohci, "ED unlink timeout\n");
+ if (quirk_zfmicro(ohci)) {
+ ohci_warn(ohci, "Attempting ZF TD recovery\n");
+ ohci->ed_to_check = ed;
+ ohci->zf_delay = 2;
+ }
+ goto sanitize;
+ }
+ spin_unlock_irqrestore (&ohci->lock, flags);
+ schedule_timeout_uninterruptible(1);
+ goto rescan;
+ case ED_IDLE: /* fully unlinked */
+ if (list_empty (&ed->td_list)) {
+ td_free (ohci, ed->dummy);
+ ed_free (ohci, ed);
+ break;
+ }
+ /* else FALL THROUGH */
+ default:
+ /* caller was supposed to have unlinked any requests;
+ * that's not our job. can't recover; must leak ed.
+ */
+ ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
+ ed, ep->desc.bEndpointAddress, ed->state,
+ list_empty (&ed->td_list) ? "" : " (has tds)");
+ td_free (ohci, ed->dummy);
+ break;
+ }
+ ep->hcpriv = NULL;
+ spin_unlock_irqrestore (&ohci->lock, flags);
+}
+
+static int ohci_get_frame (struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+
+ return ohci_frame_no(ohci);
+}
+
+static void ohci_usb_reset (struct ohci_hcd *ohci)
+{
+ ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
+ ohci->hc_control &= OHCI_CTRL_RWC;
+ ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+ ohci->rh_state = OHCI_RH_HALTED;
+}
+
+/* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
+ * other cases where the next software may expect clean state from the
+ * "firmware". this is bus-neutral, unlike shutdown() methods.
+ */
+static void
+ohci_shutdown (struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci;
+
+ ohci = hcd_to_ohci (hcd);
+ ohci_writel(ohci, (u32) ~0, &ohci->regs->intrdisable);
+
+ /* Software reset, after which the controller goes into SUSPEND */
+ ohci_writel(ohci, OHCI_HCR, &ohci->regs->cmdstatus);
+ ohci_readl(ohci, &ohci->regs->cmdstatus); /* flush the writes */
+ udelay(10);
+
+ ohci_writel(ohci, ohci->fminterval, &ohci->regs->fminterval);
+}
+
+static int check_ed(struct ohci_hcd *ohci, struct ed *ed)
+{
+ return (hc32_to_cpu(ohci, ed->hwINFO) & ED_IN) != 0
+ && (hc32_to_cpu(ohci, ed->hwHeadP) & TD_MASK)
+ == (hc32_to_cpu(ohci, ed->hwTailP) & TD_MASK)
+ && !list_empty(&ed->td_list);
+}
+
+/* ZF Micro watchdog timer callback. The ZF Micro chipset sometimes completes
+ * an interrupt TD but neglects to add it to the donelist. On systems with
+ * this chipset, we need to periodically check the state of the queues to look
+ * for such "lost" TDs.
+ */
+static void unlink_watchdog_func(unsigned long _ohci)
+{
+ unsigned long flags;
+ unsigned max;
+ unsigned seen_count = 0;
+ unsigned i;
+ struct ed **seen = NULL;
+ struct ohci_hcd *ohci = (struct ohci_hcd *) _ohci;
+
+ spin_lock_irqsave(&ohci->lock, flags);
+ max = ohci->eds_scheduled;
+ if (!max)
+ goto done;
+
+ if (ohci->ed_to_check)
+ goto out;
+
+ seen = kcalloc(max, sizeof *seen, GFP_ATOMIC);
+ if (!seen)
+ goto out;
+
+ for (i = 0; i < NUM_INTS; i++) {
+ struct ed *ed = ohci->periodic[i];
+
+ while (ed) {
+ unsigned temp;
+
+ /* scan this branch of the periodic schedule tree */
+ for (temp = 0; temp < seen_count; temp++) {
+ if (seen[temp] == ed) {
+ /* we've checked it and what's after */
+ ed = NULL;
+ break;
+ }
+ }
+ if (!ed)
+ break;
+ seen[seen_count++] = ed;
+ if (!check_ed(ohci, ed)) {
+ ed = ed->ed_next;
+ continue;
+ }
+
+ /* HC's TD list is empty, but HCD sees at least one
+ * TD that's not been sent through the donelist.
+ */
+ ohci->ed_to_check = ed;
+ ohci->zf_delay = 2;
+
+ /* The HC may wait until the next frame to report the
+ * TD as done through the donelist and INTR_WDH. (We
+ * just *assume* it's not a multi-TD interrupt URB;
+ * those could defer the IRQ more than one frame, using
+ * DI...) Check again after the next INTR_SF.
+ */
+ ohci_writel(ohci, OHCI_INTR_SF,
+ &ohci->regs->intrstatus);
+ ohci_writel(ohci, OHCI_INTR_SF,
+ &ohci->regs->intrenable);
+
+ /* flush those writes */
+ (void) ohci_readl(ohci, &ohci->regs->control);
+
+ goto out;
+ }
+ }
+out:
+ kfree(seen);
+ if (ohci->eds_scheduled)
+ mod_timer(&ohci->unlink_watchdog, round_jiffies(jiffies + HZ));
+done:
+ spin_unlock_irqrestore(&ohci->lock, flags);
+}
+
+/*-------------------------------------------------------------------------*
+ * HC functions
+ *-------------------------------------------------------------------------*/
+
+/* init memory, and kick BIOS/SMM off */
+
+static int ohci_init (struct ohci_hcd *ohci)
+{
+ int ret;
+ struct usb_hcd *hcd = ohci_to_hcd(ohci);
+
+ if (distrust_firmware)
+ ohci->flags |= OHCI_QUIRK_HUB_POWER;
+
+ ohci->rh_state = OHCI_RH_HALTED;
+ ohci->regs = hcd->regs;
+
+ /* REVISIT this BIOS handshake is now moved into PCI "quirks", and
+ * was never needed for most non-PCI systems ... remove the code?
+ */
+
+#ifndef IR_DISABLE
+ /* SMM owns the HC? not for long! */
+ if (!no_handshake && ohci_readl (ohci,
+ &ohci->regs->control) & OHCI_CTRL_IR) {
+ u32 temp;
+
+ ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n");
+
+ /* this timeout is arbitrary. we make it long, so systems
+ * depending on usb keyboards may be usable even if the
+ * BIOS/SMM code seems pretty broken.
+ */
+ temp = 500; /* arbitrary: five seconds */
+
+ ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable);
+ ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus);
+ while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) {
+ msleep (10);
+ if (--temp == 0) {
+ ohci_err (ohci, "USB HC takeover failed!"
+ " (BIOS/SMM bug)\n");
+ return -EBUSY;
+ }
+ }
+ ohci_usb_reset (ohci);
+ }
+#endif
+
+ /* Disable HC interrupts */
+ ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
+
+ /* flush the writes, and save key bits like RWC */
+ if (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_RWC)
+ ohci->hc_control |= OHCI_CTRL_RWC;
+
+ /* Read the number of ports unless overridden */
+ if (ohci->num_ports == 0)
+ ohci->num_ports = roothub_a(ohci) & RH_A_NDP;
+
+ if (ohci->hcca)
+ return 0;
+
+ ohci->hcca = dma_alloc_coherent (hcd->self.controller,
+ sizeof *ohci->hcca, &ohci->hcca_dma, 0);
+ if (!ohci->hcca)
+ return -ENOMEM;
+
+ if ((ret = ohci_mem_init (ohci)) < 0)
+ ohci_stop (hcd);
+ else {
+ create_debug_files (ohci);
+ }
+
+ return ret;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* Start an OHCI controller, set the BUS operational
+ * resets USB and controller
+ * enable interrupts
+ */
+static int ohci_run (struct ohci_hcd *ohci)
+{
+ u32 mask, val;
+ int first = ohci->fminterval == 0;
+ struct usb_hcd *hcd = ohci_to_hcd(ohci);
+
+ ohci->rh_state = OHCI_RH_HALTED;
+
+ /* boot firmware should have set this up (5.1.1.3.1) */
+ if (first) {
+
+ val = ohci_readl (ohci, &ohci->regs->fminterval);
+ ohci->fminterval = val & 0x3fff;
+ if (ohci->fminterval != FI)
+ ohci_dbg (ohci, "fminterval delta %d\n",
+ ohci->fminterval - FI);
+ ohci->fminterval |= FSMP (ohci->fminterval) << 16;
+ /* also: power/overcurrent flags in roothub.a */
+ }
+
+ /* Reset USB nearly "by the book". RemoteWakeupConnected has
+ * to be checked in case boot firmware (BIOS/SMM/...) has set up
+ * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM).
+ * If the bus glue detected wakeup capability then it should
+ * already be enabled; if so we'll just enable it again.
+ */
+ if ((ohci->hc_control & OHCI_CTRL_RWC) != 0)
+ device_set_wakeup_capable(hcd->self.controller, 1);
+
+ switch (ohci->hc_control & OHCI_CTRL_HCFS) {
+ case OHCI_USB_OPER:
+ val = 0;
+ break;
+ case OHCI_USB_SUSPEND:
+ case OHCI_USB_RESUME:
+ ohci->hc_control &= OHCI_CTRL_RWC;
+ ohci->hc_control |= OHCI_USB_RESUME;
+ val = 10 /* msec wait */;
+ break;
+ // case OHCI_USB_RESET:
+ default:
+ ohci->hc_control &= OHCI_CTRL_RWC;
+ ohci->hc_control |= OHCI_USB_RESET;
+ val = 50 /* msec wait */;
+ break;
+ }
+ ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+ // flush the writes
+ (void) ohci_readl (ohci, &ohci->regs->control);
+ msleep(val);
+
+ memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
+
+ /* 2msec timelimit here means no irqs/preempt */
+ spin_lock_irq (&ohci->lock);
+
+retry:
+ /* HC Reset requires max 10 us delay */
+ ohci_writel (ohci, OHCI_HCR, &ohci->regs->cmdstatus);
+ val = 30; /* ... allow extra time */
+ while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
+ if (--val == 0) {
+ spin_unlock_irq (&ohci->lock);
+ ohci_err (ohci, "USB HC reset timed out!\n");
+ return -1;
+ }
+ udelay (1);
+ }
+
+ /* now we're in the SUSPEND state ... must go OPERATIONAL
+ * within 2msec else HC enters RESUME
+ *
+ * ... but some hardware won't init fmInterval "by the book"
+ * (SiS, OPTi ...), so reset again instead. SiS doesn't need
+ * this if we write fmInterval after we're OPERATIONAL.
+ * Unclear about ALi, ServerWorks, and others ... this could
+ * easily be a longstanding bug in chip init on Linux.
+ */
+ if (ohci->flags & OHCI_QUIRK_INITRESET) {
+ ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+ // flush those writes
+ (void) ohci_readl (ohci, &ohci->regs->control);
+ }
+
+ /* Tell the controller where the control and bulk lists are
+ * The lists are empty now. */
+ ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
+ ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
+
+ /* a reset clears this */
+ ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
+
+ periodic_reinit (ohci);
+
+ /* some OHCI implementations are finicky about how they init.
+ * bogus values here mean not even enumeration could work.
+ */
+ if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
+ || !ohci_readl (ohci, &ohci->regs->periodicstart)) {
+ if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
+ ohci->flags |= OHCI_QUIRK_INITRESET;
+ ohci_dbg (ohci, "enabling initreset quirk\n");
+ goto retry;
+ }
+ spin_unlock_irq (&ohci->lock);
+ ohci_err (ohci, "init err (%08x %04x)\n",
+ ohci_readl (ohci, &ohci->regs->fminterval),
+ ohci_readl (ohci, &ohci->regs->periodicstart));
+ return -EOVERFLOW;
+ }
+
+ /* use rhsc irqs after khubd is fully initialized */
+ set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+ hcd->uses_new_polling = 1;
+
+ /* start controller operations */
+ ohci->hc_control &= OHCI_CTRL_RWC;
+ ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
+ ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+ ohci->rh_state = OHCI_RH_RUNNING;
+
+ /* wake on ConnectStatusChange, matching external hubs */
+ ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
+
+ /* Choose the interrupts we care about now, others later on demand */
+ mask = OHCI_INTR_INIT;
+ ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
+ ohci_writel (ohci, mask, &ohci->regs->intrenable);
+
+ /* handle root hub init quirks ... */
+ val = roothub_a (ohci);
+ val &= ~(RH_A_PSM | RH_A_OCPM);
+ if (ohci->flags & OHCI_QUIRK_SUPERIO) {
+ /* NSC 87560 and maybe others */
+ val |= RH_A_NOCP;
+ val &= ~(RH_A_POTPGT | RH_A_NPS);
+ ohci_writel (ohci, val, &ohci->regs->roothub.a);
+ } else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
+ (ohci->flags & OHCI_QUIRK_HUB_POWER)) {
+ /* hub power always on; required for AMD-756 and some
+ * Mac platforms. ganged overcurrent reporting, if any.
+ */
+ val |= RH_A_NPS;
+ ohci_writel (ohci, val, &ohci->regs->roothub.a);
+ }
+ ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
+ ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
+ &ohci->regs->roothub.b);
+ // flush those writes
+ (void) ohci_readl (ohci, &ohci->regs->control);
+
+ ohci->next_statechange = jiffies + STATECHANGE_DELAY;
+ spin_unlock_irq (&ohci->lock);
+
+ // POTPGT delay is bits 24-31, in 2 ms units.
+ mdelay ((val >> 23) & 0x1fe);
+
+ if (quirk_zfmicro(ohci)) {
+ /* Create timer to watch for bad queue state on ZF Micro */
+ setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
+ (unsigned long) ohci);
+
+ ohci->eds_scheduled = 0;
+ ohci->ed_to_check = NULL;
+ }
+
+ ohci_dump (ohci, 1);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* an interrupt happens */
+
+static irqreturn_t ohci_irq (struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+ struct ohci_regs __iomem *regs = ohci->regs;
+ int ints;
+
+ /* Read interrupt status (and flush pending writes). We ignore the
+ * optimization of checking the LSB of hcca->done_head; it doesn't
+ * work on all systems (edge triggering for OHCI can be a factor).
+ */
+ ints = ohci_readl(ohci, ®s->intrstatus);
+
+ /* Check for an all 1's result which is a typical consequence
+ * of dead, unclocked, or unplugged (CardBus...) devices
+ */
+ if (ints == ~(u32)0) {
+ ohci->rh_state = OHCI_RH_HALTED;
+ ohci_dbg (ohci, "device removed!\n");
+ usb_hc_died(hcd);
+ return IRQ_HANDLED;
+ }
+
+ /* We only care about interrupts that are enabled */
+ ints &= ohci_readl(ohci, ®s->intrenable);
+
+ /* interrupt for some other device? */
+ if (ints == 0 || unlikely(ohci->rh_state == OHCI_RH_HALTED))
+ return IRQ_NOTMINE;
+
+ if (ints & OHCI_INTR_UE) {
+ // e.g. due to PCI Master/Target Abort
+ if (quirk_nec(ohci)) {
+ /* Workaround for a silicon bug in some NEC chips used
+ * in Apple's PowerBooks. Adapted from Darwin code.
+ */
+ ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
+
+ ohci_writel (ohci, OHCI_INTR_UE, ®s->intrdisable);
+
+ schedule_work (&ohci->nec_work);
+ } else {
+ ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
+ ohci->rh_state = OHCI_RH_HALTED;
+ usb_hc_died(hcd);
+ }
+
+ ohci_dump (ohci, 1);
+ ohci_usb_reset (ohci);
+ }
+
+ if (ints & OHCI_INTR_RHSC) {
+ ohci_vdbg(ohci, "rhsc\n");
+ ohci->next_statechange = jiffies + STATECHANGE_DELAY;
+ ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
+ ®s->intrstatus);
+
+ /* NOTE: Vendors didn't always make the same implementation
+ * choices for RHSC. Many followed the spec; RHSC triggers
+ * on an edge, like setting and maybe clearing a port status
+ * change bit. With others it's level-triggered, active
+ * until khubd clears all the port status change bits. We'll
+ * always disable it here and rely on polling until khubd
+ * re-enables it.
+ */
+ ohci_writel(ohci, OHCI_INTR_RHSC, ®s->intrdisable);
+ usb_hcd_poll_rh_status(hcd);
+ }
+
+ /* For connect and disconnect events, we expect the controller
+ * to turn on RHSC along with RD. But for remote wakeup events
+ * this might not happen.
+ */
+ else if (ints & OHCI_INTR_RD) {
+ ohci_vdbg(ohci, "resume detect\n");
+ ohci_writel(ohci, OHCI_INTR_RD, ®s->intrstatus);
+ set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+ if (ohci->autostop) {
+ spin_lock (&ohci->lock);
+ ohci_rh_resume (ohci);
+ spin_unlock (&ohci->lock);
+ } else
+ usb_hcd_resume_root_hub(hcd);
+ }
+
+ if (ints & OHCI_INTR_WDH) {
+ if (ohci->hcca->done_head == 0) {
+ ints &= ~OHCI_INTR_WDH;
+ } else {
+ spin_lock (&ohci->lock);
+ dl_done_list (ohci);
+ spin_unlock (&ohci->lock);
+ }
+ }
+
+ if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
+ spin_lock(&ohci->lock);
+ if (ohci->ed_to_check) {
+ struct ed *ed = ohci->ed_to_check;
+
+ if (check_ed(ohci, ed)) {
+ /* HC thinks the TD list is empty; HCD knows
+ * at least one TD is outstanding
+ */
+ if (--ohci->zf_delay == 0) {
+ struct td *td = list_entry(
+ ed->td_list.next,
+ struct td, td_list);
+ ohci_warn(ohci,
+ "Reclaiming orphan TD %p\n",
+ td);
+ takeback_td(ohci, td);
+ ohci->ed_to_check = NULL;
+ }
+ } else
+ ohci->ed_to_check = NULL;
+ }
+ spin_unlock(&ohci->lock);
+ }
+
+ /* could track INTR_SO to reduce available PCI/... bandwidth */
+
+ /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
+ * when there's still unlinking to be done (next frame).
+ */
+ spin_lock (&ohci->lock);
+ if (ohci->ed_rm_list)
+ finish_unlinks (ohci, ohci_frame_no(ohci));
+ if ((ints & OHCI_INTR_SF) != 0
+ && !ohci->ed_rm_list
+ && !ohci->ed_to_check
+ && ohci->rh_state == OHCI_RH_RUNNING)
+ ohci_writel (ohci, OHCI_INTR_SF, ®s->intrdisable);
+ spin_unlock (&ohci->lock);
+
+ if (ohci->rh_state == OHCI_RH_RUNNING) {
+ ohci_writel (ohci, ints, ®s->intrstatus);
+ ohci_writel (ohci, OHCI_INTR_MIE, ®s->intrenable);
+ // flush those writes
+ (void) ohci_readl (ohci, &ohci->regs->control);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void ohci_stop (struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+
+ ohci_dump (ohci, 1);
+
+ if (quirk_nec(ohci))
+ flush_work_sync(&ohci->nec_work);
+
+ ohci_usb_reset (ohci);
+ ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
+ free_irq(hcd->irq, hcd);
+ hcd->irq = 0;
+
+ if (quirk_zfmicro(ohci))
+ del_timer(&ohci->unlink_watchdog);
+ if (quirk_amdiso(ohci))
+ usb_amd_dev_put();
+
+ remove_debug_files (ohci);
+ ohci_mem_cleanup (ohci);
+ if (ohci->hcca) {
+ dma_free_coherent (hcd->self.controller,
+ sizeof *ohci->hcca,
+ ohci->hcca, ohci->hcca_dma);
+ ohci->hcca = NULL;
+ ohci->hcca_dma = 0;
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+
+#if defined(CONFIG_PM) || defined(CONFIG_PCI)
+
+/* must not be called from interrupt context */
+static int ohci_restart (struct ohci_hcd *ohci)
+{
+ int temp;
+ int i;
+ struct urb_priv *priv;
+
+ spin_lock_irq(&ohci->lock);
+ ohci->rh_state = OHCI_RH_HALTED;
+
+ /* Recycle any "live" eds/tds (and urbs). */
+ if (!list_empty (&ohci->pending))
+ ohci_dbg(ohci, "abort schedule...\n");
+ list_for_each_entry (priv, &ohci->pending, pending) {
+ struct urb *urb = priv->td[0]->urb;
+ struct ed *ed = priv->ed;
+
+ switch (ed->state) {
+ case ED_OPER:
+ ed->state = ED_UNLINK;
+ ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
+ ed_deschedule (ohci, ed);
+
+ ed->ed_next = ohci->ed_rm_list;
+ ed->ed_prev = NULL;
+ ohci->ed_rm_list = ed;
+ /* FALLTHROUGH */
+ case ED_UNLINK:
+ break;
+ default:
+ ohci_dbg(ohci, "bogus ed %p state %d\n",
+ ed, ed->state);
+ }
+
+ if (!urb->unlinked)
+ urb->unlinked = -ESHUTDOWN;
+ }
+ finish_unlinks (ohci, 0);
+ spin_unlock_irq(&ohci->lock);
+
+ /* paranoia, in case that didn't work: */
+
+ /* empty the interrupt branches */
+ for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
+ for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
+
+ /* no EDs to remove */
+ ohci->ed_rm_list = NULL;
+
+ /* empty control and bulk lists */
+ ohci->ed_controltail = NULL;
+ ohci->ed_bulktail = NULL;
+
+ if ((temp = ohci_run (ohci)) < 0) {
+ ohci_err (ohci, "can't restart, %d\n", temp);
+ return temp;
+ }
+ ohci_dbg(ohci, "restart complete\n");
+ return 0;
+}
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+MODULE_AUTHOR (DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE ("GPL");
+
+#ifdef CONFIG_PCI
+#include "ohci-pci.c"
+#define PCI_DRIVER ohci_pci_driver
+#endif
+
+#if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
+#include "ohci-sa1111.c"
+#define SA1111_DRIVER ohci_hcd_sa1111_driver
+#endif
+
+#if defined(CONFIG_ARCH_S3C24XX) || defined(CONFIG_ARCH_S3C64XX)
+#include "ohci-s3c2410.c"
+#define PLATFORM_DRIVER ohci_hcd_s3c2410_driver
+#endif
+
+#ifdef CONFIG_USB_OHCI_EXYNOS
+#include "ohci-exynos.c"
+#define PLATFORM_DRIVER exynos_ohci_driver
+#endif
+
+#ifdef CONFIG_USB_OHCI_HCD_OMAP1
+#include "ohci-omap.c"
+#define OMAP1_PLATFORM_DRIVER ohci_hcd_omap_driver
+#endif
+
+#ifdef CONFIG_USB_OHCI_HCD_OMAP3
+#include "ohci-omap3.c"
+#define OMAP3_PLATFORM_DRIVER ohci_hcd_omap3_driver
+#endif
+
+#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
+#include "ohci-pxa27x.c"
+#define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
+#endif
+
+#ifdef CONFIG_ARCH_EP93XX
+#include "ohci-ep93xx.c"
+#define PLATFORM_DRIVER ohci_hcd_ep93xx_driver
+#endif
+
+#ifdef CONFIG_MIPS_ALCHEMY
+#include "ohci-au1xxx.c"
+#define PLATFORM_DRIVER ohci_hcd_au1xxx_driver
+#endif
+
+#ifdef CONFIG_PNX8550
+#include "ohci-pnx8550.c"
+#define PLATFORM_DRIVER ohci_hcd_pnx8550_driver
+#endif
+
+#ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
+#include "ohci-ppc-soc.c"
+#define PLATFORM_DRIVER ohci_hcd_ppc_soc_driver
+#endif
+
+#ifdef CONFIG_ARCH_AT91
+#include "ohci-at91.c"
+#define PLATFORM_DRIVER ohci_hcd_at91_driver
+#endif
+
+#if defined(CONFIG_ARCH_PNX4008) || defined(CONFIG_ARCH_LPC32XX)
+#include "ohci-nxp.c"
+#define PLATFORM_DRIVER usb_hcd_nxp_driver
+#endif
+
+#ifdef CONFIG_ARCH_DAVINCI_DA8XX
+#include "ohci-da8xx.c"
+#define PLATFORM_DRIVER ohci_hcd_da8xx_driver
+#endif
+
+#ifdef CONFIG_USB_OHCI_SH
+#include "ohci-sh.c"
+#define PLATFORM_DRIVER ohci_hcd_sh_driver
+#endif
+
+
+#ifdef CONFIG_USB_OHCI_HCD_PPC_OF
+#include "ohci-ppc-of.c"
+#define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
+#endif
+
+#ifdef CONFIG_PLAT_SPEAR
+#include "ohci-spear.c"
+#define PLATFORM_DRIVER spear_ohci_hcd_driver
+#endif
+
+#ifdef CONFIG_PPC_PS3
+#include "ohci-ps3.c"
+#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
+#endif
+
+#ifdef CONFIG_USB_OHCI_HCD_SSB
+#include "ohci-ssb.c"
+#define SSB_OHCI_DRIVER ssb_ohci_driver
+#endif
+
+#ifdef CONFIG_MFD_SM501
+#include "ohci-sm501.c"
+#define SM501_OHCI_DRIVER ohci_hcd_sm501_driver
+#endif
+
+#ifdef CONFIG_MFD_TC6393XB
+#include "ohci-tmio.c"
+#define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver
+#endif
+
+#ifdef CONFIG_MACH_JZ4740
+#include "ohci-jz4740.c"
+#define PLATFORM_DRIVER ohci_hcd_jz4740_driver
+#endif
+
+#ifdef CONFIG_USB_OCTEON_OHCI
+#include "ohci-octeon.c"
+#define PLATFORM_DRIVER ohci_octeon_driver
+#endif
+
+#ifdef CONFIG_USB_CNS3XXX_OHCI
+#include "ohci-cns3xxx.c"
+#define PLATFORM_DRIVER ohci_hcd_cns3xxx_driver
+#endif
+
+#ifdef CONFIG_CPU_XLR
+#include "ohci-xls.c"
+#define PLATFORM_DRIVER ohci_xls_driver
+#endif
+
+#ifdef CONFIG_USB_OHCI_HCD_PLATFORM
+#include "ohci-platform.c"
+#define PLATFORM_DRIVER ohci_platform_driver
+#endif
+
+#if !defined(PCI_DRIVER) && \
+ !defined(PLATFORM_DRIVER) && \
+ !defined(OMAP1_PLATFORM_DRIVER) && \
+ !defined(OMAP3_PLATFORM_DRIVER) && \
+ !defined(OF_PLATFORM_DRIVER) && \
+ !defined(SA1111_DRIVER) && \
+ !defined(PS3_SYSTEM_BUS_DRIVER) && \
+ !defined(SM501_OHCI_DRIVER) && \
+ !defined(TMIO_OHCI_DRIVER) && \
+ !defined(SSB_OHCI_DRIVER)
+#error "missing bus glue for ohci-hcd"
+#endif
+
+static int __init ohci_hcd_mod_init(void)
+{
+ int retval = 0;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
+ pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
+ sizeof (struct ed), sizeof (struct td));
+ set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
+
+#ifdef DEBUG
+ ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root);
+ if (!ohci_debug_root) {
+ retval = -ENOENT;
+ goto error_debug;
+ }
+#endif
+
+#ifdef PS3_SYSTEM_BUS_DRIVER
+ retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
+ if (retval < 0)
+ goto error_ps3;
+#endif
+
+#ifdef PLATFORM_DRIVER
+ retval = platform_driver_register(&PLATFORM_DRIVER);
+ if (retval < 0)
+ goto error_platform;
+#endif
+
+#ifdef OMAP1_PLATFORM_DRIVER
+ retval = platform_driver_register(&OMAP1_PLATFORM_DRIVER);
+ if (retval < 0)
+ goto error_omap1_platform;
+#endif
+
+#ifdef OMAP3_PLATFORM_DRIVER
+ retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER);
+ if (retval < 0)
+ goto error_omap3_platform;
+#endif
+
+#ifdef OF_PLATFORM_DRIVER
+ retval = platform_driver_register(&OF_PLATFORM_DRIVER);
+ if (retval < 0)
+ goto error_of_platform;
+#endif
+
+#ifdef SA1111_DRIVER
+ retval = sa1111_driver_register(&SA1111_DRIVER);
+ if (retval < 0)
+ goto error_sa1111;
+#endif
+
+#ifdef PCI_DRIVER
+ retval = pci_register_driver(&PCI_DRIVER);
+ if (retval < 0)
+ goto error_pci;
+#endif
+
+#ifdef SSB_OHCI_DRIVER
+ retval = ssb_driver_register(&SSB_OHCI_DRIVER);
+ if (retval)
+ goto error_ssb;
+#endif
+
+#ifdef SM501_OHCI_DRIVER
+ retval = platform_driver_register(&SM501_OHCI_DRIVER);
+ if (retval < 0)
+ goto error_sm501;
+#endif
+
+#ifdef TMIO_OHCI_DRIVER
+ retval = platform_driver_register(&TMIO_OHCI_DRIVER);
+ if (retval < 0)
+ goto error_tmio;
+#endif
+
+ return retval;
+
+ /* Error path */
+#ifdef TMIO_OHCI_DRIVER
+ platform_driver_unregister(&TMIO_OHCI_DRIVER);
+ error_tmio:
+#endif
+#ifdef SM501_OHCI_DRIVER
+ platform_driver_unregister(&SM501_OHCI_DRIVER);
+ error_sm501:
+#endif
+#ifdef SSB_OHCI_DRIVER
+ ssb_driver_unregister(&SSB_OHCI_DRIVER);
+ error_ssb:
+#endif
+#ifdef PCI_DRIVER
+ pci_unregister_driver(&PCI_DRIVER);
+ error_pci:
+#endif
+#ifdef SA1111_DRIVER
+ sa1111_driver_unregister(&SA1111_DRIVER);
+ error_sa1111:
+#endif
+#ifdef OF_PLATFORM_DRIVER
+ platform_driver_unregister(&OF_PLATFORM_DRIVER);
+ error_of_platform:
+#endif
+#ifdef PLATFORM_DRIVER
+ platform_driver_unregister(&PLATFORM_DRIVER);
+ error_platform:
+#endif
+#ifdef OMAP1_PLATFORM_DRIVER
+ platform_driver_unregister(&OMAP1_PLATFORM_DRIVER);
+ error_omap1_platform:
+#endif
+#ifdef OMAP3_PLATFORM_DRIVER
+ platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
+ error_omap3_platform:
+#endif
+#ifdef PS3_SYSTEM_BUS_DRIVER
+ ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
+ error_ps3:
+#endif
+#ifdef DEBUG
+ debugfs_remove(ohci_debug_root);
+ ohci_debug_root = NULL;
+ error_debug:
+#endif
+
+ clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
+ return retval;
+}
+module_init(ohci_hcd_mod_init);
+
+static void __exit ohci_hcd_mod_exit(void)
+{
+#ifdef TMIO_OHCI_DRIVER
+ platform_driver_unregister(&TMIO_OHCI_DRIVER);
+#endif
+#ifdef SM501_OHCI_DRIVER
+ platform_driver_unregister(&SM501_OHCI_DRIVER);
+#endif
+#ifdef SSB_OHCI_DRIVER
+ ssb_driver_unregister(&SSB_OHCI_DRIVER);
+#endif
+#ifdef PCI_DRIVER
+ pci_unregister_driver(&PCI_DRIVER);
+#endif
+#ifdef SA1111_DRIVER
+ sa1111_driver_unregister(&SA1111_DRIVER);
+#endif
+#ifdef OF_PLATFORM_DRIVER
+ platform_driver_unregister(&OF_PLATFORM_DRIVER);
+#endif
+#ifdef PLATFORM_DRIVER
+ platform_driver_unregister(&PLATFORM_DRIVER);
+#endif
+#ifdef OMAP3_PLATFORM_DRIVER
+ platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
+#endif
+#ifdef PS3_SYSTEM_BUS_DRIVER
+ ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
+#endif
+#ifdef DEBUG
+ debugfs_remove(ohci_debug_root);
+#endif
+ clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
+}
+module_exit(ohci_hcd_mod_exit);
+