patch-2.4.21 linux-2.4.21/drivers/usb/host/uhci.c

• Lines: 3173
• Date: 2003-06-13 07:51:36.000000000 -0700
• Orig file: linux-2.4.20/drivers/usb/host/uhci.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/drivers/usb/host/uhci.c linux-2.4.21/drivers/usb/host/uhci.c
@@ -0,0 +1,3172 @@
+/*
+ * Universal Host Controller Interface driver for USB.
+ *
+ * Maintainer: Johannes Erdfelt <johannes@erdfelt.com>
+ *
+ * (C) Copyright 1999 Linus Torvalds
+ * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
+ * (C) Copyright 1999 Randy Dunlap
+ * (C) Copyright 1999 Georg Acher, acher@in.tum.de
+ * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de
+ * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch
+ * (C) Copyright 1999 Roman Weissgaerber, weissg@vienna.at
+ * (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface
+ *               support from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
+ * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
+ *
+ * Intel documents this fairly well, and as far as I know there
+ * are no royalties or anything like that, but even so there are
+ * people who decided that they want to do the same thing in a
+ * completely different way.
+ *
+ * WARNING! The USB documentation is downright evil. Most of it
+ * is just crap, written by a committee. You're better off ignoring
+ * most of it, the important stuff is:
+ *  - the low-level protocol (fairly simple but lots of small details)
+ *  - working around the horridness of the rest
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/proc_fs.h>
+#ifdef CONFIG_USB_DEBUG
+#define DEBUG
+#else
+#undef DEBUG
+#endif
+#include <linux/usb.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+
+#include "uhci.h"
+
+#include <linux/pm.h>
+
+#include "../hcd.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v1.1"
+#define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber"
+#define DRIVER_DESC "USB Universal Host Controller Interface driver"
+
+/*
+ * debug = 0, no debugging messages
+ * debug = 1, dump failed URB's except for stalls
+ * debug = 2, dump all failed URB's (including stalls)
+ *            show all queues in /proc/uhci/hc*
+ * debug = 3, show all TD's in URB's when dumping
+ */
+#ifdef DEBUG
+static int debug = 1;
+#else
+static int debug = 0;
+#endif
+MODULE_PARM(debug, "i");
+MODULE_PARM_DESC(debug, "Debug level");
+static char *errbuf;
+#define ERRBUF_LEN    (PAGE_SIZE * 8)
+
+#include "uhci-debug.h"
+
+static kmem_cache_t *uhci_up_cachep;	/* urb_priv */
+
+static int rh_submit_urb(struct urb *urb);
+static int rh_unlink_urb(struct urb *urb);
+static int uhci_get_current_frame_number(struct usb_device *dev);
+static int uhci_unlink_urb(struct urb *urb);
+static void uhci_unlink_generic(struct uhci *uhci, struct urb *urb);
+static void uhci_call_completion(struct urb *urb);
+
+static int  ports_active(struct uhci *uhci);
+static void suspend_hc(struct uhci *uhci);
+static void wakeup_hc(struct uhci *uhci);
+
+/* If a transfer is still active after this much time, turn off FSBR */
+#define IDLE_TIMEOUT	(HZ / 20)	/* 50 ms */
+#define FSBR_DELAY	(HZ / 20)	/* 50 ms */
+
+/* When we timeout an idle transfer for FSBR, we'll switch it over to */
+/* depth first traversal. We'll do it in groups of this number of TD's */
+/* to make sure it doesn't hog all of the bandwidth */
+#define DEPTH_INTERVAL	5
+
+#define MAX_URB_LOOP	2048		/* Maximum number of linked URB's */
+
+/*
+ * Only the USB core should call uhci_alloc_dev and uhci_free_dev
+ */
+static int uhci_alloc_dev(struct usb_device *dev)
+{
+	return 0;
+}
+
+static int uhci_free_dev(struct usb_device *dev)
+{
+	return 0;
+}
+
+/*
+ * Technically, updating td->status here is a race, but it's not really a
+ * problem. The worst that can happen is that we set the IOC bit again
+ * generating a spurios interrupt. We could fix this by creating another
+ * QH and leaving the IOC bit always set, but then we would have to play
+ * games with the FSBR code to make sure we get the correct order in all
+ * the cases. I don't think it's worth the effort
+ */
+static inline void uhci_set_next_interrupt(struct uhci *uhci)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+	uhci->skel_term_td->status |= TD_CTRL_IOC;
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+static inline void uhci_clear_next_interrupt(struct uhci *uhci)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+	uhci->skel_term_td->status &= ~TD_CTRL_IOC;
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+static inline void uhci_add_complete(struct urb *urb)
+{
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	unsigned long flags;
+
+	spin_lock_irqsave(&uhci->complete_list_lock, flags);
+	list_add_tail(&urbp->complete_list, &uhci->complete_list);
+	spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
+}
+
+static struct uhci_td *uhci_alloc_td(struct uhci *uhci, struct usb_device *dev)
+{
+	dma_addr_t dma_handle;
+	struct uhci_td *td;
+
+	td = pci_pool_alloc(uhci->td_pool, GFP_DMA | GFP_ATOMIC, &dma_handle);
+	if (!td)
+		return NULL;
+
+	td->dma_handle = dma_handle;
+
+	td->link = UHCI_PTR_TERM;
+	td->buffer = 0;
+
+	td->frame = -1;
+	td->dev = dev;
+
+	INIT_LIST_HEAD(&td->list);
+	INIT_LIST_HEAD(&td->fl_list);
+
+	usb_inc_dev_use(dev);
+
+	return td;
+}
+
+static void inline uhci_fill_td(struct uhci_td *td, __u32 status,
+		__u32 info, __u32 buffer)
+{
+	td->status = status;
+	td->info = info;
+	td->buffer = buffer;
+}
+
+static void uhci_insert_td(struct uhci *uhci, struct uhci_td *skeltd, struct uhci_td *td)
+{
+	unsigned long flags;
+	struct uhci_td *ltd;
+
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+
+	ltd = list_entry(skeltd->fl_list.prev, struct uhci_td, fl_list);
+
+	td->link = ltd->link;
+	mb();
+	ltd->link = td->dma_handle;
+
+	list_add_tail(&td->fl_list, &skeltd->fl_list);
+
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+/*
+ * We insert Isochronous transfers directly into the frame list at the
+ * beginning
+ * The layout looks as follows:
+ * frame list pointer -> iso td's (if any) ->
+ * periodic interrupt td (if frame 0) -> irq td's -> control qh -> bulk qh
+ */
+static void uhci_insert_td_frame_list(struct uhci *uhci, struct uhci_td *td, unsigned framenum)
+{
+	unsigned long flags;
+
+	framenum %= UHCI_NUMFRAMES;
+
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+
+	td->frame = framenum;
+
+	/* Is there a TD already mapped there? */
+	if (uhci->fl->frame_cpu[framenum]) {
+		struct uhci_td *ftd, *ltd;
+
+		ftd = uhci->fl->frame_cpu[framenum];
+		ltd = list_entry(ftd->fl_list.prev, struct uhci_td, fl_list);
+
+		list_add_tail(&td->fl_list, &ftd->fl_list);
+
+		td->link = ltd->link;
+		mb();
+		ltd->link = td->dma_handle;
+	} else {
+		td->link = uhci->fl->frame[framenum];
+		mb();
+		uhci->fl->frame[framenum] = td->dma_handle;
+		uhci->fl->frame_cpu[framenum] = td;
+	}
+
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+static void uhci_remove_td(struct uhci *uhci, struct uhci_td *td)
+{
+	unsigned long flags;
+
+	/* If it's not inserted, don't remove it */
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+	if (td->frame == -1 && list_empty(&td->fl_list))
+		goto out;
+
+	if (td->frame != -1 && uhci->fl->frame_cpu[td->frame] == td) {
+		if (list_empty(&td->fl_list)) {
+			uhci->fl->frame[td->frame] = td->link;
+			uhci->fl->frame_cpu[td->frame] = NULL;
+		} else {
+			struct uhci_td *ntd;
+
+			ntd = list_entry(td->fl_list.next, struct uhci_td, fl_list);
+			uhci->fl->frame[td->frame] = ntd->dma_handle;
+			uhci->fl->frame_cpu[td->frame] = ntd;
+		}
+	} else {
+		struct uhci_td *ptd;
+
+		ptd = list_entry(td->fl_list.prev, struct uhci_td, fl_list);
+		ptd->link = td->link;
+	}
+
+	mb();
+	td->link = UHCI_PTR_TERM;
+
+	list_del_init(&td->fl_list);
+	td->frame = -1;
+
+out:
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+/*
+ * Inserts a td into qh list at the top.
+ */
+static void uhci_insert_tds_in_qh(struct uhci_qh *qh, struct urb *urb, int breadth)
+{
+	struct list_head *tmp, *head;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	struct uhci_td *td, *ptd;
+
+	if (list_empty(&urbp->td_list))
+		return;
+
+	head = &urbp->td_list;
+	tmp = head->next;
+
+	/* Ordering isn't important here yet since the QH hasn't been */
+	/*  inserted into the schedule yet */
+	td = list_entry(tmp, struct uhci_td, list);
+
+	/* Add the first TD to the QH element pointer */
+	qh->element = td->dma_handle | (breadth ? 0 : UHCI_PTR_DEPTH);
+
+	ptd = td;
+
+	/* Then link the rest of the TD's */
+	tmp = tmp->next;
+	while (tmp != head) {
+		td = list_entry(tmp, struct uhci_td, list);
+
+		tmp = tmp->next;
+
+		ptd->link = td->dma_handle | (breadth ? 0 : UHCI_PTR_DEPTH);
+
+		ptd = td;
+	}
+
+	ptd->link = UHCI_PTR_TERM;
+}
+
+static void uhci_free_td(struct uhci *uhci, struct uhci_td *td)
+{
+	if (!list_empty(&td->list) || !list_empty(&td->fl_list))
+		dbg("td is still in URB list!");
+
+	if (td->dev)
+		usb_dec_dev_use(td->dev);
+
+	pci_pool_free(uhci->td_pool, td, td->dma_handle);
+}
+
+static struct uhci_qh *uhci_alloc_qh(struct uhci *uhci, struct usb_device *dev)
+{
+	dma_addr_t dma_handle;
+	struct uhci_qh *qh;
+
+	qh = pci_pool_alloc(uhci->qh_pool, GFP_DMA | GFP_ATOMIC, &dma_handle);
+	if (!qh)
+		return NULL;
+
+	qh->dma_handle = dma_handle;
+
+	qh->element = UHCI_PTR_TERM;
+	qh->link = UHCI_PTR_TERM;
+
+	qh->dev = dev;
+	qh->urbp = NULL;
+
+	INIT_LIST_HEAD(&qh->list);
+	INIT_LIST_HEAD(&qh->remove_list);
+
+	usb_inc_dev_use(dev);
+
+	return qh;
+}
+
+static void uhci_free_qh(struct uhci *uhci, struct uhci_qh *qh)
+{
+	if (!list_empty(&qh->list))
+		dbg("qh list not empty!");
+	if (!list_empty(&qh->remove_list))
+		dbg("qh still in remove_list!");
+
+	if (qh->dev)
+		usb_dec_dev_use(qh->dev);
+
+	pci_pool_free(uhci->qh_pool, qh, qh->dma_handle);
+}
+
+/*
+ * MUST be called with uhci->frame_list_lock acquired
+ */
+static void _uhci_insert_qh(struct uhci *uhci, struct uhci_qh *skelqh, struct urb *urb)
+{
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	struct list_head *head, *tmp;
+	struct uhci_qh *lqh;
+
+	/* Grab the last QH */
+	lqh = list_entry(skelqh->list.prev, struct uhci_qh, list);
+
+	if (lqh->urbp) {
+		head = &lqh->urbp->queue_list;
+		tmp = head->next;
+		while (head != tmp) {
+			struct urb_priv *turbp =
+				list_entry(tmp, struct urb_priv, queue_list);
+
+			tmp = tmp->next;
+
+			turbp->qh->link = urbp->qh->dma_handle | UHCI_PTR_QH;
+		}
+	}
+
+	head = &urbp->queue_list;
+	tmp = head->next;
+	while (head != tmp) {
+		struct urb_priv *turbp =
+			list_entry(tmp, struct urb_priv, queue_list);
+
+		tmp = tmp->next;
+
+		turbp->qh->link = lqh->link;
+	}
+
+	urbp->qh->link = lqh->link;
+	mb();				/* Ordering is important */
+	lqh->link = urbp->qh->dma_handle | UHCI_PTR_QH;
+
+	list_add_tail(&urbp->qh->list, &skelqh->list);
+}
+
+static void uhci_insert_qh(struct uhci *uhci, struct uhci_qh *skelqh, struct urb *urb)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+	_uhci_insert_qh(uhci, skelqh, urb);
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+static void uhci_remove_qh(struct uhci *uhci, struct uhci_qh *qh)
+{
+	unsigned long flags;
+	struct uhci_qh *pqh;
+
+	if (!qh)
+		return;
+
+	qh->urbp = NULL;
+
+	/* Only go through the hoops if it's actually linked in */
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+	if (!list_empty(&qh->list)) {
+		pqh = list_entry(qh->list.prev, struct uhci_qh, list);
+
+		if (pqh->urbp) {
+			struct list_head *head, *tmp;
+
+			head = &pqh->urbp->queue_list;
+			tmp = head->next;
+			while (head != tmp) {
+				struct urb_priv *turbp =
+					list_entry(tmp, struct urb_priv, queue_list);
+
+				tmp = tmp->next;
+
+				turbp->qh->link = qh->link;
+			}
+		}
+
+		pqh->link = qh->link;
+		mb();
+		qh->element = qh->link = UHCI_PTR_TERM;
+
+		list_del_init(&qh->list);
+	}
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+
+	spin_lock_irqsave(&uhci->qh_remove_list_lock, flags);
+
+	/* Check to see if the remove list is empty. Set the IOC bit */
+	/* to force an interrupt so we can remove the QH */
+	if (list_empty(&uhci->qh_remove_list))
+		uhci_set_next_interrupt(uhci);
+
+	list_add(&qh->remove_list, &uhci->qh_remove_list);
+
+	spin_unlock_irqrestore(&uhci->qh_remove_list_lock, flags);
+}
+
+static int uhci_fixup_toggle(struct urb *urb, unsigned int toggle)
+{
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	struct list_head *head, *tmp;
+
+	head = &urbp->td_list;
+	tmp = head->next;
+	while (head != tmp) {
+		struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
+
+		tmp = tmp->next;
+
+		if (toggle)
+			td->info |= TD_TOKEN_TOGGLE;
+		else
+			td->info &= ~TD_TOKEN_TOGGLE;
+
+		toggle ^= 1;
+	}
+
+	return toggle;
+}
+
+/* This function will append one URB's QH to another URB's QH. This is for */
+/*  USB_QUEUE_BULK support for bulk transfers and soon implicitily for */
+/*  control transfers */
+static void uhci_append_queued_urb(struct uhci *uhci, struct urb *eurb, struct urb *urb)
+{
+	struct urb_priv *eurbp, *urbp, *furbp, *lurbp;
+	struct list_head *tmp;
+	struct uhci_td *lltd;
+	unsigned long flags;
+
+	eurbp = eurb->hcpriv;
+	urbp = urb->hcpriv;
+
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+
+	/* Find the first URB in the queue */
+	if (eurbp->queued) {
+		struct list_head *head = &eurbp->queue_list;
+
+		tmp = head->next;
+		while (tmp != head) {
+			struct urb_priv *turbp =
+				list_entry(tmp, struct urb_priv, queue_list);
+
+			if (!turbp->queued)
+				break;
+
+			tmp = tmp->next;
+		}
+	} else
+		tmp = &eurbp->queue_list;
+
+	furbp = list_entry(tmp, struct urb_priv, queue_list);
+	lurbp = list_entry(furbp->queue_list.prev, struct urb_priv, queue_list);
+
+	lltd = list_entry(lurbp->td_list.prev, struct uhci_td, list);
+
+	usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe),
+		uhci_fixup_toggle(urb, uhci_toggle(lltd->info) ^ 1));
+
+	/* All qh's in the queue need to link to the next queue */
+	urbp->qh->link = eurbp->qh->link;
+
+	mb();			/* Make sure we flush everything */
+	/* Only support bulk right now, so no depth */
+	lltd->link = urbp->qh->dma_handle | UHCI_PTR_QH;
+
+	list_add_tail(&urbp->queue_list, &furbp->queue_list);
+
+	urbp->queued = 1;
+
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+static void uhci_delete_queued_urb(struct uhci *uhci, struct urb *urb)
+{
+	struct urb_priv *urbp, *nurbp;
+	struct list_head *head, *tmp;
+	struct urb_priv *purbp;
+	struct uhci_td *pltd;
+	unsigned int toggle;
+	unsigned long flags;
+
+	urbp = urb->hcpriv;
+
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+
+	if (list_empty(&urbp->queue_list))
+		goto out;
+
+	nurbp = list_entry(urbp->queue_list.next, struct urb_priv, queue_list);
+
+	/* Fix up the toggle for the next URB's */
+	if (!urbp->queued)
+		/* We set the toggle when we unlink */
+		toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
+	else {
+		/* If we're in the middle of the queue, grab the toggle */
+		/*  from the TD previous to us */
+		purbp = list_entry(urbp->queue_list.prev, struct urb_priv,
+				queue_list);
+
+		pltd = list_entry(purbp->td_list.prev, struct uhci_td, list);
+
+		toggle = uhci_toggle(pltd->info) ^ 1;
+	}
+
+	head = &urbp->queue_list;
+	tmp = head->next;
+	while (head != tmp) {
+		struct urb_priv *turbp;
+
+		turbp = list_entry(tmp, struct urb_priv, queue_list);
+
+		tmp = tmp->next;
+
+		if (!turbp->queued)
+			break;
+
+		toggle = uhci_fixup_toggle(turbp->urb, toggle);
+	}
+
+	usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+		usb_pipeout(urb->pipe), toggle);
+
+	if (!urbp->queued) {
+		nurbp->queued = 0;
+
+		_uhci_insert_qh(uhci, uhci->skel_bulk_qh, nurbp->urb);
+	} else {
+		/* We're somewhere in the middle (or end). A bit trickier */
+		/*  than the head scenario */
+		purbp = list_entry(urbp->queue_list.prev, struct urb_priv,
+				queue_list);
+
+		pltd = list_entry(purbp->td_list.prev, struct uhci_td, list);
+		if (nurbp->queued)
+			pltd->link = nurbp->qh->dma_handle | UHCI_PTR_QH;
+		else
+			/* The next URB happens to be the beginning, so */
+			/*  we're the last, end the chain */
+			pltd->link = UHCI_PTR_TERM;
+	}
+
+	list_del_init(&urbp->queue_list);
+
+out:
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+static struct urb_priv *uhci_alloc_urb_priv(struct uhci *uhci, struct urb *urb)
+{
+	struct urb_priv *urbp;
+
+	urbp = kmem_cache_alloc(uhci_up_cachep, SLAB_ATOMIC);
+	if (!urbp) {
+		err("uhci_alloc_urb_priv: couldn't allocate memory for urb_priv\n");
+		return NULL;
+	}
+
+	memset((void *)urbp, 0, sizeof(*urbp));
+
+	urbp->inserttime = jiffies;
+	urbp->fsbrtime = jiffies;
+	urbp->urb = urb;
+	urbp->dev = urb->dev;
+	
+	INIT_LIST_HEAD(&urbp->td_list);
+	INIT_LIST_HEAD(&urbp->queue_list);
+	INIT_LIST_HEAD(&urbp->complete_list);
+
+	urb->hcpriv = urbp;
+
+	if (urb->dev != uhci->rh.dev) {
+		if (urb->transfer_buffer_length) {
+			urbp->transfer_buffer_dma_handle = pci_map_single(uhci->dev,
+				urb->transfer_buffer, urb->transfer_buffer_length,
+				usb_pipein(urb->pipe) ? PCI_DMA_FROMDEVICE :
+				PCI_DMA_TODEVICE);
+			if (!urbp->transfer_buffer_dma_handle)
+				return NULL;
+		}
+
+		if (usb_pipetype(urb->pipe) == PIPE_CONTROL && urb->setup_packet) {
+			urbp->setup_packet_dma_handle = pci_map_single(uhci->dev,
+				urb->setup_packet, sizeof(struct usb_ctrlrequest),
+				PCI_DMA_TODEVICE);
+			if (!urbp->setup_packet_dma_handle)
+				return NULL;
+		}
+	}
+
+	return urbp;
+}
+
+/*
+ * MUST be called with urb->lock acquired
+ */
+static void uhci_add_td_to_urb(struct urb *urb, struct uhci_td *td)
+{
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+
+	td->urb = urb;
+
+	list_add_tail(&td->list, &urbp->td_list);
+}
+
+/*
+ * MUST be called with urb->lock acquired
+ */
+static void uhci_remove_td_from_urb(struct uhci_td *td)
+{
+	if (list_empty(&td->list))
+		return;
+
+	list_del_init(&td->list);
+
+	td->urb = NULL;
+}
+
+/*
+ * MUST be called with urb->lock acquired
+ */
+static void uhci_destroy_urb_priv(struct urb *urb)
+{
+	struct list_head *head, *tmp;
+	struct urb_priv *urbp;
+	struct uhci *uhci;
+
+	urbp = (struct urb_priv *)urb->hcpriv;
+	if (!urbp)
+		return;
+
+	if (!urbp->dev || !urbp->dev->bus || !urbp->dev->bus->hcpriv) {
+		warn("uhci_destroy_urb_priv: urb %p belongs to disconnected device or bus?", urb);
+		return;
+	}
+
+	if (!list_empty(&urb->urb_list))
+		warn("uhci_destroy_urb_priv: urb %p still on uhci->urb_list or uhci->remove_list", urb);
+
+	if (!list_empty(&urbp->complete_list))
+		warn("uhci_destroy_urb_priv: urb %p still on uhci->complete_list", urb);
+
+	uhci = urbp->dev->bus->hcpriv;
+
+	head = &urbp->td_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
+
+		tmp = tmp->next;
+
+		uhci_remove_td_from_urb(td);
+		uhci_remove_td(uhci, td);
+		uhci_free_td(uhci, td);
+	}
+
+	if (urbp->setup_packet_dma_handle) {
+		pci_unmap_single(uhci->dev, urbp->setup_packet_dma_handle,
+			sizeof(struct usb_ctrlrequest), PCI_DMA_TODEVICE);
+		urbp->setup_packet_dma_handle = 0;
+	}
+
+	if (urbp->transfer_buffer_dma_handle) {
+		pci_unmap_single(uhci->dev, urbp->transfer_buffer_dma_handle,
+			urb->transfer_buffer_length, usb_pipein(urb->pipe) ?
+			PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
+		urbp->transfer_buffer_dma_handle = 0;
+	}
+
+	urb->hcpriv = NULL;
+	kmem_cache_free(uhci_up_cachep, urbp);
+}
+
+static void uhci_inc_fsbr(struct uhci *uhci, struct urb *urb)
+{
+	unsigned long flags;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+
+	if ((!(urb->transfer_flags & USB_NO_FSBR)) && !urbp->fsbr) {
+		urbp->fsbr = 1;
+		if (!uhci->fsbr++ && !uhci->fsbrtimeout)
+			uhci->skel_term_qh->link = uhci->skel_hs_control_qh->dma_handle | UHCI_PTR_QH;
+	}
+
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+static void uhci_dec_fsbr(struct uhci *uhci, struct urb *urb)
+{
+	unsigned long flags;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+
+	spin_lock_irqsave(&uhci->frame_list_lock, flags);
+
+	if ((!(urb->transfer_flags & USB_NO_FSBR)) && urbp->fsbr) {
+		urbp->fsbr = 0;
+		if (!--uhci->fsbr)
+			uhci->fsbrtimeout = jiffies + FSBR_DELAY;
+	}
+
+	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
+}
+
+/*
+ * Map status to standard result codes
+ *
+ * <status> is (td->status & 0xFE0000) [a.k.a. uhci_status_bits(td->status)]
+ * <dir_out> is True for output TDs and False for input TDs.
+ */
+static int uhci_map_status(int status, int dir_out)
+{
+	if (!status)
+		return 0;
+	if (status & TD_CTRL_BITSTUFF)			/* Bitstuff error */
+		return -EPROTO;
+	if (status & TD_CTRL_CRCTIMEO) {		/* CRC/Timeout */
+		if (dir_out)
+			return -ETIMEDOUT;
+		else
+			return -EILSEQ;
+	}
+	if (status & TD_CTRL_NAK)			/* NAK */
+		return -ETIMEDOUT;
+	if (status & TD_CTRL_BABBLE)			/* Babble */
+		return -EOVERFLOW;
+	if (status & TD_CTRL_DBUFERR)			/* Buffer error */
+		return -ENOSR;
+	if (status & TD_CTRL_STALLED)			/* Stalled */
+		return -EPIPE;
+	if (status & TD_CTRL_ACTIVE)			/* Active */
+		return 0;
+
+	return -EINVAL;
+}
+
+/*
+ * Control transfers
+ */
+static int uhci_submit_control(struct urb *urb)
+{
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	struct uhci_td *td;
+	struct uhci_qh *qh;
+	unsigned long destination, status;
+	int maxsze = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+	int len = urb->transfer_buffer_length;
+	dma_addr_t data = urbp->transfer_buffer_dma_handle;
+
+	/* The "pipe" thing contains the destination in bits 8--18 */
+	destination = (urb->pipe & PIPE_DEVEP_MASK) | USB_PID_SETUP;
+
+	/* 3 errors */
+	status = (urb->pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | (3 << 27);
+
+	/*
+	 * Build the TD for the control request
+	 */
+	td = uhci_alloc_td(uhci, urb->dev);
+	if (!td)
+		return -ENOMEM;
+
+	uhci_add_td_to_urb(urb, td);
+	uhci_fill_td(td, status, destination | (7 << 21),
+		urbp->setup_packet_dma_handle);
+
+	/*
+	 * If direction is "send", change the frame from SETUP (0x2D)
+	 * to OUT (0xE1). Else change it from SETUP to IN (0x69).
+	 */
+	destination ^= (USB_PID_SETUP ^ usb_packetid(urb->pipe));
+
+	if (!(urb->transfer_flags & USB_DISABLE_SPD))
+		status |= TD_CTRL_SPD;
+
+	/*
+	 * Build the DATA TD's
+	 */
+	while (len > 0) {
+		int pktsze = len;
+
+		if (pktsze > maxsze)
+			pktsze = maxsze;
+
+		td = uhci_alloc_td(uhci, urb->dev);
+		if (!td)
+			return -ENOMEM;
+
+		/* Alternate Data0/1 (start with Data1) */
+		destination ^= TD_TOKEN_TOGGLE;
+	
+		uhci_add_td_to_urb(urb, td);
+		uhci_fill_td(td, status, destination | ((pktsze - 1) << 21),
+			data);
+
+		data += pktsze;
+		len -= pktsze;
+	}
+
+	/*
+	 * Build the final TD for control status 
+	 */
+	td = uhci_alloc_td(uhci, urb->dev);
+	if (!td)
+		return -ENOMEM;
+
+	/*
+	 * It's IN if the pipe is an output pipe or we're not expecting
+	 * data back.
+	 */
+	destination &= ~TD_TOKEN_PID_MASK;
+	if (usb_pipeout(urb->pipe) || !urb->transfer_buffer_length)
+		destination |= USB_PID_IN;
+	else
+		destination |= USB_PID_OUT;
+
+	destination |= TD_TOKEN_TOGGLE;		/* End in Data1 */
+
+	status &= ~TD_CTRL_SPD;
+
+	uhci_add_td_to_urb(urb, td);
+	uhci_fill_td(td, status | TD_CTRL_IOC,
+		destination | (UHCI_NULL_DATA_SIZE << 21), 0);
+
+	qh = uhci_alloc_qh(uhci, urb->dev);
+	if (!qh)
+		return -ENOMEM;
+
+	urbp->qh = qh;
+	qh->urbp = urbp;
+
+	/* Low speed or small transfers gets a different queue and treatment */
+	if (urb->pipe & TD_CTRL_LS) {
+		uhci_insert_tds_in_qh(qh, urb, 0);
+		uhci_insert_qh(uhci, uhci->skel_ls_control_qh, urb);
+	} else {
+		uhci_insert_tds_in_qh(qh, urb, 1);
+		uhci_insert_qh(uhci, uhci->skel_hs_control_qh, urb);
+		uhci_inc_fsbr(uhci, urb);
+	}
+
+	return -EINPROGRESS;
+}
+
+static int usb_control_retrigger_status(struct urb *urb);
+
+static int uhci_result_control(struct urb *urb)
+{
+	struct list_head *tmp, *head;
+	struct urb_priv *urbp = urb->hcpriv;
+	struct uhci_td *td;
+	unsigned int status;
+	int ret = 0;
+
+	if (list_empty(&urbp->td_list))
+		return -EINVAL;
+
+	head = &urbp->td_list;
+
+	if (urbp->short_control_packet) {
+		tmp = head->prev;
+		goto status_phase;
+	}
+
+	tmp = head->next;
+	td = list_entry(tmp, struct uhci_td, list);
+
+	/* The first TD is the SETUP phase, check the status, but skip */
+	/*  the count */
+	status = uhci_status_bits(td->status);
+	if (status & TD_CTRL_ACTIVE)
+		return -EINPROGRESS;
+
+	if (status)
+		goto td_error;
+
+	urb->actual_length = 0;
+
+	/* The rest of the TD's (but the last) are data */
+	tmp = tmp->next;
+	while (tmp != head && tmp->next != head) {
+		td = list_entry(tmp, struct uhci_td, list);
+
+		tmp = tmp->next;
+
+		status = uhci_status_bits(td->status);
+		if (status & TD_CTRL_ACTIVE)
+			return -EINPROGRESS;
+
+		urb->actual_length += uhci_actual_length(td->status);
+
+		if (status)
+			goto td_error;
+
+		/* Check to see if we received a short packet */
+		if (uhci_actual_length(td->status) < uhci_expected_length(td->info)) {
+			if (urb->transfer_flags & USB_DISABLE_SPD) {
+				ret = -EREMOTEIO;
+				goto err;
+			}
+
+			if (uhci_packetid(td->info) == USB_PID_IN)
+				return usb_control_retrigger_status(urb);
+			else
+				return 0;
+		}
+	}
+
+status_phase:
+	td = list_entry(tmp, struct uhci_td, list);
+
+	/* Control status phase */
+	status = uhci_status_bits(td->status);
+
+#ifdef I_HAVE_BUGGY_APC_BACKUPS
+	/* APC BackUPS Pro kludge */
+	/* It tries to send all of the descriptor instead of the amount */
+	/*  we requested */
+	if (td->status & TD_CTRL_IOC &&	/* IOC is masked out by uhci_status_bits */
+	    status & TD_CTRL_ACTIVE &&
+	    status & TD_CTRL_NAK)
+		return 0;
+#endif
+
+	if (status & TD_CTRL_ACTIVE)
+		return -EINPROGRESS;
+
+	if (status)
+		goto td_error;
+
+	return 0;
+
+td_error:
+	ret = uhci_map_status(status, uhci_packetout(td->info));
+	if (ret == -EPIPE)
+		/* endpoint has stalled - mark it halted */
+		usb_endpoint_halt(urb->dev, uhci_endpoint(td->info),
+	    			uhci_packetout(td->info));
+
+err:
+	if ((debug == 1 && ret != -EPIPE) || debug > 1) {
+		/* Some debugging code */
+		dbg("uhci_result_control() failed with status %x", status);
+
+		if (errbuf) {
+			/* Print the chain for debugging purposes */
+			uhci_show_qh(urbp->qh, errbuf, ERRBUF_LEN, 0);
+
+			lprintk(errbuf);
+		}
+	}
+
+	return ret;
+}
+
+static int usb_control_retrigger_status(struct urb *urb)
+{
+	struct list_head *tmp, *head;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	struct uhci *uhci = urb->dev->bus->hcpriv;
+
+	urbp->short_control_packet = 1;
+
+	/* Create a new QH to avoid pointer overwriting problems */
+	uhci_remove_qh(uhci, urbp->qh);
+
+	/* Delete all of the TD's except for the status TD at the end */
+	head = &urbp->td_list;
+	tmp = head->next;
+	while (tmp != head && tmp->next != head) {
+		struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
+
+		tmp = tmp->next;
+
+		uhci_remove_td_from_urb(td);
+		uhci_remove_td(uhci, td);
+		uhci_free_td(uhci, td);
+	}
+
+	urbp->qh = uhci_alloc_qh(uhci, urb->dev);
+	if (!urbp->qh) {
+		err("unable to allocate new QH for control retrigger");
+		return -ENOMEM;
+	}
+
+	urbp->qh->urbp = urbp;
+
+	/* One TD, who cares about Breadth first? */
+	uhci_insert_tds_in_qh(urbp->qh, urb, 0);
+
+	/* Low speed or small transfers gets a different queue and treatment */
+	if (urb->pipe & TD_CTRL_LS)
+		uhci_insert_qh(uhci, uhci->skel_ls_control_qh, urb);
+	else
+		uhci_insert_qh(uhci, uhci->skel_hs_control_qh, urb);
+
+	return -EINPROGRESS;
+}
+
+/*
+ * Interrupt transfers
+ */
+static int uhci_submit_interrupt(struct urb *urb)
+{
+	struct uhci_td *td;
+	unsigned long destination, status;
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+
+	if (urb->transfer_buffer_length > usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))
+		return -EINVAL;
+
+	/* The "pipe" thing contains the destination in bits 8--18 */
+	destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid(urb->pipe);
+
+	status = (urb->pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | TD_CTRL_IOC;
+
+	td = uhci_alloc_td(uhci, urb->dev);
+	if (!td)
+		return -ENOMEM;
+
+	destination |= (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT);
+	destination |= ((urb->transfer_buffer_length - 1) << 21);
+
+	usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
+
+	uhci_add_td_to_urb(urb, td);
+	uhci_fill_td(td, status, destination, urbp->transfer_buffer_dma_handle);
+
+	uhci_insert_td(uhci, uhci->skeltd[__interval_to_skel(urb->interval)], td);
+
+	return -EINPROGRESS;
+}
+
+static int uhci_result_interrupt(struct urb *urb)
+{
+	struct list_head *tmp, *head;
+	struct urb_priv *urbp = urb->hcpriv;
+	struct uhci_td *td;
+	unsigned int status;
+	int ret = 0;
+
+	urb->actual_length = 0;
+
+	head = &urbp->td_list;
+	tmp = head->next;
+	while (tmp != head) {
+		td = list_entry(tmp, struct uhci_td, list);
+
+		tmp = tmp->next;
+
+		status = uhci_status_bits(td->status);
+		if (status & TD_CTRL_ACTIVE)
+			return -EINPROGRESS;
+
+		urb->actual_length += uhci_actual_length(td->status);
+
+		if (status)
+			goto td_error;
+
+		if (uhci_actual_length(td->status) < uhci_expected_length(td->info)) {
+			if (urb->transfer_flags & USB_DISABLE_SPD) {
+				ret = -EREMOTEIO;
+				goto err;
+			} else
+				return 0;
+		}
+	}
+
+	return 0;
+
+td_error:
+	ret = uhci_map_status(status, uhci_packetout(td->info));
+	if (ret == -EPIPE)
+		/* endpoint has stalled - mark it halted */
+		usb_endpoint_halt(urb->dev, uhci_endpoint(td->info),
+	    			uhci_packetout(td->info));
+
+err:
+	if ((debug == 1 && ret != -EPIPE) || debug > 1) {
+		/* Some debugging code */
+		dbg("uhci_result_interrupt/bulk() failed with status %x",
+			status);
+
+		if (errbuf) {
+			/* Print the chain for debugging purposes */
+			if (urbp->qh)
+				uhci_show_qh(urbp->qh, errbuf, ERRBUF_LEN, 0);
+			else
+				uhci_show_td(td, errbuf, ERRBUF_LEN, 0);
+
+			lprintk(errbuf);
+		}
+	}
+
+	return ret;
+}
+
+static void uhci_reset_interrupt(struct urb *urb)
+{
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	struct uhci_td *td;
+	unsigned long flags;
+
+	spin_lock_irqsave(&urb->lock, flags);
+
+	/* Root hub is special */
+	if (urb->dev == uhci->rh.dev)
+		goto out;
+
+	td = list_entry(urbp->td_list.next, struct uhci_td, list);
+
+	td->status = (td->status & 0x2F000000) | TD_CTRL_ACTIVE | TD_CTRL_IOC;
+	td->info &= ~TD_TOKEN_TOGGLE;
+	td->info |= (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT);
+	usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
+
+out:
+	urb->status = -EINPROGRESS;
+
+	spin_unlock_irqrestore(&urb->lock, flags);
+}
+
+/*
+ * Bulk transfers
+ */
+static int uhci_submit_bulk(struct urb *urb, struct urb *eurb)
+{
+	struct uhci_td *td;
+	struct uhci_qh *qh;
+	unsigned long destination, status;
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	int maxsze = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+	int len = urb->transfer_buffer_length;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	dma_addr_t data = urbp->transfer_buffer_dma_handle;
+
+	if (len < 0 || maxsze <= 0)
+		return -EINVAL;
+
+	/* Can't have low speed bulk transfers */
+	if (urb->pipe & TD_CTRL_LS)
+		return -EINVAL;
+
+	/* The "pipe" thing contains the destination in bits 8--18 */
+	destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid(urb->pipe);
+
+	/* 3 errors */
+	status = TD_CTRL_ACTIVE | (3 << TD_CTRL_C_ERR_SHIFT);
+
+	if (!(urb->transfer_flags & USB_DISABLE_SPD))
+		status |= TD_CTRL_SPD;
+
+	/*
+	 * Build the DATA TD's
+	 */
+	do {	/* Allow zero length packets */
+		int pktsze = len;
+
+		if (pktsze > maxsze)
+			pktsze = maxsze;
+
+		td = uhci_alloc_td(uhci, urb->dev);
+		if (!td)
+			return -ENOMEM;
+
+		uhci_add_td_to_urb(urb, td);
+		uhci_fill_td(td, status, destination |
+			(((pktsze - 1) & UHCI_NULL_DATA_SIZE) << 21) |
+			(usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+			 usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT),
+			data);
+
+		data += pktsze;
+		len -= maxsze;
+
+		usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+			usb_pipeout(urb->pipe));
+	} while (len > 0);
+
+	/*
+	 * USB_ZERO_PACKET means adding a 0-length packet, if
+	 * direction is OUT and the transfer_length was an
+	 * exact multiple of maxsze, hence
+	 * (len = transfer_length - N * maxsze) == 0
+	 * however, if transfer_length == 0, the zero packet
+	 * was already prepared above.
+	 */
+	if (usb_pipeout(urb->pipe) && (urb->transfer_flags & USB_ZERO_PACKET) &&
+	   !len && urb->transfer_buffer_length) {
+		td = uhci_alloc_td(uhci, urb->dev);
+		if (!td)
+			return -ENOMEM;
+
+		uhci_add_td_to_urb(urb, td);
+		uhci_fill_td(td, status, destination |
+			(UHCI_NULL_DATA_SIZE << 21) |
+			(usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+			 usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT),
+			data);
+
+		usb_dotoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+			usb_pipeout(urb->pipe));
+	}
+
+	/* Set the flag on the last packet */
+	td->status |= TD_CTRL_IOC;
+
+	qh = uhci_alloc_qh(uhci, urb->dev);
+	if (!qh)
+		return -ENOMEM;
+
+	urbp->qh = qh;
+	qh->urbp = urbp;
+
+	/* Always assume breadth first */
+	uhci_insert_tds_in_qh(qh, urb, 1);
+
+	if (urb->transfer_flags & USB_QUEUE_BULK && eurb)
+		uhci_append_queued_urb(uhci, eurb, urb);
+	else
+		uhci_insert_qh(uhci, uhci->skel_bulk_qh, urb);
+
+	uhci_inc_fsbr(uhci, urb);
+
+	return -EINPROGRESS;
+}
+
+/* We can use the result interrupt since they're identical */
+#define uhci_result_bulk uhci_result_interrupt
+
+/*
+ * Isochronous transfers
+ */
+static int isochronous_find_limits(struct urb *urb, unsigned int *start, unsigned int *end)
+{
+	struct urb *last_urb = NULL;
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	struct list_head *tmp, *head;
+	int ret = 0;
+
+	head = &uhci->urb_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct urb *u = list_entry(tmp, struct urb, urb_list);
+
+		tmp = tmp->next;
+
+		/* look for pending URB's with identical pipe handle */
+		if ((urb->pipe == u->pipe) && (urb->dev == u->dev) &&
+		    (u->status == -EINPROGRESS) && (u != urb)) {
+			if (!last_urb)
+				*start = u->start_frame;
+			last_urb = u;
+		}
+	}
+
+	if (last_urb) {
+		*end = (last_urb->start_frame + last_urb->number_of_packets) & 1023;
+		ret = 0;
+	} else
+		ret = -1;	/* no previous urb found */
+
+	return ret;
+}
+
+static int isochronous_find_start(struct urb *urb)
+{
+	int limits;
+	unsigned int start = 0, end = 0;
+
+	if (urb->number_of_packets > 900)	/* 900? Why? */
+		return -EFBIG;
+
+	limits = isochronous_find_limits(urb, &start, &end);
+
+	if (urb->transfer_flags & USB_ISO_ASAP) {
+		if (limits) {
+			int curframe;
+
+			curframe = uhci_get_current_frame_number(urb->dev) % UHCI_NUMFRAMES;
+			urb->start_frame = (curframe + 10) % UHCI_NUMFRAMES;
+		} else
+			urb->start_frame = end;
+	} else {
+		urb->start_frame %= UHCI_NUMFRAMES;
+		/* FIXME: Sanity check */
+	}
+
+	return 0;
+}
+
+/*
+ * Isochronous transfers
+ */
+static int uhci_submit_isochronous(struct urb *urb)
+{
+	struct uhci_td *td;
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	int i, ret, framenum;
+	int status, destination;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+
+	status = TD_CTRL_ACTIVE | TD_CTRL_IOS;
+	destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid(urb->pipe);
+
+	ret = isochronous_find_start(urb);
+	if (ret)
+		return ret;
+
+	framenum = urb->start_frame;
+	for (i = 0; i < urb->number_of_packets; i++, framenum++) {
+		if (!urb->iso_frame_desc[i].length)
+			continue;
+
+		td = uhci_alloc_td(uhci, urb->dev);
+		if (!td)
+			return -ENOMEM;
+
+		uhci_add_td_to_urb(urb, td);
+		uhci_fill_td(td, status, destination | ((urb->iso_frame_desc[i].length - 1) << 21),
+			urbp->transfer_buffer_dma_handle + urb->iso_frame_desc[i].offset);
+
+		if (i + 1 >= urb->number_of_packets)
+			td->status |= TD_CTRL_IOC;
+
+		uhci_insert_td_frame_list(uhci, td, framenum);
+	}
+
+	return -EINPROGRESS;
+}
+
+static int uhci_result_isochronous(struct urb *urb)
+{
+	struct list_head *tmp, *head;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	int status;
+	int i, ret = 0;
+
+	urb->actual_length = 0;
+
+	i = 0;
+	head = &urbp->td_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
+		int actlength;
+
+		tmp = tmp->next;
+
+		if (td->status & TD_CTRL_ACTIVE)
+			return -EINPROGRESS;
+
+		actlength = uhci_actual_length(td->status);
+		urb->iso_frame_desc[i].actual_length = actlength;
+		urb->actual_length += actlength;
+
+		status = uhci_map_status(uhci_status_bits(td->status), usb_pipeout(urb->pipe));
+		urb->iso_frame_desc[i].status = status;
+		if (status) {
+			urb->error_count++;
+			ret = status;
+		}
+
+		i++;
+	}
+
+	return ret;
+}
+
+/*
+ * MUST be called with uhci->urb_list_lock acquired
+ */
+static struct urb *uhci_find_urb_ep(struct uhci *uhci, struct urb *urb)
+{
+	struct list_head *tmp, *head;
+
+	/* We don't match Isoc transfers since they are special */
+	if (usb_pipeisoc(urb->pipe))
+		return NULL;
+
+	head = &uhci->urb_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct urb *u = list_entry(tmp, struct urb, urb_list);
+
+		tmp = tmp->next;
+
+		if (u->dev == urb->dev && u->pipe == urb->pipe &&
+		    u->status == -EINPROGRESS)
+			return u;
+	}
+
+	return NULL;
+}
+
+static int uhci_submit_urb(struct urb *urb)
+{
+	int ret = -EINVAL;
+	struct uhci *uhci;
+	unsigned long flags;
+	struct urb *eurb;
+	int bustime;
+
+	if (!urb)
+		return -EINVAL;
+
+	if (!urb->dev || !urb->dev->bus || !urb->dev->bus->hcpriv) {
+		warn("uhci_submit_urb: urb %p belongs to disconnected device or bus?", urb);
+		return -ENODEV;
+	}
+
+	uhci = (struct uhci *)urb->dev->bus->hcpriv;
+
+	usb_inc_dev_use(urb->dev);
+
+	spin_lock_irqsave(&uhci->urb_list_lock, flags);
+	spin_lock(&urb->lock);
+
+	if (urb->status == -EINPROGRESS || urb->status == -ECONNRESET ||
+	    urb->status == -ECONNABORTED) {
+		dbg("uhci_submit_urb: urb not available to submit (status = %d)", urb->status);
+		/* Since we can have problems on the out path */
+		spin_unlock(&urb->lock);
+		spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
+		usb_dec_dev_use(urb->dev);
+
+		return ret;
+	}
+
+	INIT_LIST_HEAD(&urb->urb_list);
+	if (!uhci_alloc_urb_priv(uhci, urb)) {
+		ret = -ENOMEM;
+
+		goto out;
+	}
+
+	eurb = uhci_find_urb_ep(uhci, urb);
+	if (eurb && !(urb->transfer_flags & USB_QUEUE_BULK)) {
+		ret = -ENXIO;
+
+		goto out;
+	}
+
+	/* Short circuit the virtual root hub */
+	if (urb->dev == uhci->rh.dev) {
+		ret = rh_submit_urb(urb);
+
+		goto out;
+	}
+
+	switch (usb_pipetype(urb->pipe)) {
+	case PIPE_CONTROL:
+		ret = uhci_submit_control(urb);
+		break;
+	case PIPE_INTERRUPT:
+		if (urb->bandwidth == 0) {	/* not yet checked/allocated */
+			bustime = usb_check_bandwidth(urb->dev, urb);
+			if (bustime < 0)
+				ret = bustime;
+			else {
+				ret = uhci_submit_interrupt(urb);
+				if (ret == -EINPROGRESS)
+					usb_claim_bandwidth(urb->dev, urb, bustime, 0);
+			}
+		} else		/* bandwidth is already set */
+			ret = uhci_submit_interrupt(urb);
+		break;
+	case PIPE_BULK:
+		ret = uhci_submit_bulk(urb, eurb);
+		break;
+	case PIPE_ISOCHRONOUS:
+		if (urb->bandwidth == 0) {	/* not yet checked/allocated */
+			if (urb->number_of_packets <= 0) {
+				ret = -EINVAL;
+				break;
+			}
+			bustime = usb_check_bandwidth(urb->dev, urb);
+			if (bustime < 0) {
+				ret = bustime;
+				break;
+			}
+
+			ret = uhci_submit_isochronous(urb);
+			if (ret == -EINPROGRESS)
+				usb_claim_bandwidth(urb->dev, urb, bustime, 1);
+		} else		/* bandwidth is already set */
+			ret = uhci_submit_isochronous(urb);
+		break;
+	}
+
+out:
+	urb->status = ret;
+
+	if (ret == -EINPROGRESS) {
+		/* We use _tail to make find_urb_ep more efficient */
+		list_add_tail(&urb->urb_list, &uhci->urb_list);
+
+		spin_unlock(&urb->lock);
+		spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
+
+		return 0;
+	}
+
+	uhci_unlink_generic(uhci, urb);
+
+	spin_unlock(&urb->lock);
+	spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
+
+	/* Only call completion if it was successful */
+	if (!ret)
+		uhci_call_completion(urb);
+
+	return ret;
+}
+
+/*
+ * Return the result of a transfer
+ *
+ * MUST be called with urb_list_lock acquired
+ */
+static void uhci_transfer_result(struct uhci *uhci, struct urb *urb)
+{
+	int ret = -EINVAL;
+	unsigned long flags;
+	struct urb_priv *urbp;
+
+	/* The root hub is special */
+	if (urb->dev == uhci->rh.dev)
+		return;
+
+	spin_lock_irqsave(&urb->lock, flags);
+
+	urbp = (struct urb_priv *)urb->hcpriv;
+
+	if (urb->status != -EINPROGRESS) {
+		info("uhci_transfer_result: called for URB %p not in flight?", urb);
+		goto out;
+	}
+
+	switch (usb_pipetype(urb->pipe)) {
+	case PIPE_CONTROL:
+		ret = uhci_result_control(urb);
+		break;
+	case PIPE_INTERRUPT:
+		ret = uhci_result_interrupt(urb);
+		break;
+	case PIPE_BULK:
+		ret = uhci_result_bulk(urb);
+		break;
+	case PIPE_ISOCHRONOUS:
+		ret = uhci_result_isochronous(urb);
+		break;
+	}
+
+	urbp->status = ret;
+
+	if (ret == -EINPROGRESS)
+		goto out;
+
+	switch (usb_pipetype(urb->pipe)) {
+	case PIPE_CONTROL:
+	case PIPE_BULK:
+	case PIPE_ISOCHRONOUS:
+		/* Release bandwidth for Interrupt or Isoc. transfers */
+		/* Spinlock needed ? */
+		if (urb->bandwidth)
+			usb_release_bandwidth(urb->dev, urb, 1);
+		uhci_unlink_generic(uhci, urb);
+		break;
+	case PIPE_INTERRUPT:
+		/* Interrupts are an exception */
+		if (urb->interval)
+			goto out_complete;
+
+		/* Release bandwidth for Interrupt or Isoc. transfers */
+		/* Spinlock needed ? */
+		if (urb->bandwidth)
+			usb_release_bandwidth(urb->dev, urb, 0);
+		uhci_unlink_generic(uhci, urb);
+		break;
+	default:
+		info("uhci_transfer_result: unknown pipe type %d for urb %p\n",
+			usb_pipetype(urb->pipe), urb);
+	}
+
+	/* Remove it from uhci->urb_list */
+	list_del_init(&urb->urb_list);
+
+out_complete:
+	uhci_add_complete(urb);
+
+out:
+	spin_unlock_irqrestore(&urb->lock, flags);
+}
+
+/*
+ * MUST be called with urb->lock acquired
+ */
+static void uhci_unlink_generic(struct uhci *uhci, struct urb *urb)
+{
+	struct list_head *head, *tmp;
+	struct urb_priv *urbp = urb->hcpriv;
+	int prevactive = 1;
+
+	/* We can get called when urbp allocation fails, so check */
+	if (!urbp)
+		return;
+
+	uhci_dec_fsbr(uhci, urb);	/* Safe since it checks */
+
+	/*
+	 * Now we need to find out what the last successful toggle was
+	 * so we can update the local data toggle for the next transfer
+	 *
+	 * There's 3 way's the last successful completed TD is found:
+	 *
+	 * 1) The TD is NOT active and the actual length < expected length
+	 * 2) The TD is NOT active and it's the last TD in the chain
+	 * 3) The TD is active and the previous TD is NOT active
+	 *
+	 * Control and Isochronous ignore the toggle, so this is safe
+	 * for all types
+	 */
+	head = &urbp->td_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
+
+		tmp = tmp->next;
+
+		if (!(td->status & TD_CTRL_ACTIVE) &&
+		    (uhci_actual_length(td->status) < uhci_expected_length(td->info) ||
+		    tmp == head))
+			usb_settoggle(urb->dev, uhci_endpoint(td->info),
+				uhci_packetout(td->info),
+				uhci_toggle(td->info) ^ 1);
+		else if ((td->status & TD_CTRL_ACTIVE) && !prevactive)
+			usb_settoggle(urb->dev, uhci_endpoint(td->info),
+				uhci_packetout(td->info),
+				uhci_toggle(td->info));
+
+		prevactive = td->status & TD_CTRL_ACTIVE;
+	}
+
+	uhci_delete_queued_urb(uhci, urb);
+
+	/* The interrupt loop will reclaim the QH's */
+	uhci_remove_qh(uhci, urbp->qh);
+	urbp->qh = NULL;
+}
+
+static int uhci_unlink_urb(struct urb *urb)
+{
+	struct uhci *uhci;
+	unsigned long flags;
+	struct urb_priv *urbp = urb->hcpriv;
+
+	if (!urb)
+		return -EINVAL;
+
+	if (!urb->dev || !urb->dev->bus || !urb->dev->bus->hcpriv)
+		return -ENODEV;
+
+	uhci = (struct uhci *)urb->dev->bus->hcpriv;
+
+	spin_lock_irqsave(&uhci->urb_list_lock, flags);
+	spin_lock(&urb->lock);
+
+	/* Release bandwidth for Interrupt or Isoc. transfers */
+	/* Spinlock needed ? */
+	if (urb->bandwidth) {
+		switch (usb_pipetype(urb->pipe)) {
+		case PIPE_INTERRUPT:
+			usb_release_bandwidth(urb->dev, urb, 0);
+			break;
+		case PIPE_ISOCHRONOUS:
+			usb_release_bandwidth(urb->dev, urb, 1);
+			break;
+		default:
+			break;
+		}
+	}
+
+	if (urb->status != -EINPROGRESS) {
+		spin_unlock(&urb->lock);
+		spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
+		return 0;
+	}
+
+	list_del_init(&urb->urb_list);
+
+	uhci_unlink_generic(uhci, urb);
+
+	/* Short circuit the virtual root hub */
+	if (urb->dev == uhci->rh.dev) {
+		rh_unlink_urb(urb);
+
+		spin_unlock(&urb->lock);
+		spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
+
+		uhci_call_completion(urb);
+	} else {
+		if (urb->transfer_flags & USB_ASYNC_UNLINK) {
+			urbp->status = urb->status = -ECONNABORTED;
+
+			spin_lock(&uhci->urb_remove_list_lock);
+
+			/* If we're the first, set the next interrupt bit */
+			if (list_empty(&uhci->urb_remove_list))
+				uhci_set_next_interrupt(uhci);
+			
+			list_add(&urb->urb_list, &uhci->urb_remove_list);
+
+			spin_unlock(&uhci->urb_remove_list_lock);
+
+			spin_unlock(&urb->lock);
+			spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
+
+		} else {
+			urb->status = -ENOENT;
+
+			spin_unlock(&urb->lock);
+			spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
+
+			if (in_interrupt()) {	/* wait at least 1 frame */
+				static int errorcount = 10;
+
+				if (errorcount--)
+					dbg("uhci_unlink_urb called from interrupt for urb %p", urb);
+				udelay(1000);
+			} else
+				schedule_timeout(1+1*HZ/1000); 
+
+			uhci_call_completion(urb);
+		}
+	}
+
+	return 0;
+}
+
+static int uhci_fsbr_timeout(struct uhci *uhci, struct urb *urb)
+{
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	struct list_head *head, *tmp;
+	int count = 0;
+
+	uhci_dec_fsbr(uhci, urb);
+
+	urbp->fsbr_timeout = 1;
+
+	/*
+	 * Ideally we would want to fix qh->element as well, but it's
+	 * read/write by the HC, so that can introduce a race. It's not
+	 * really worth the hassle
+	 */
+
+	head = &urbp->td_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
+
+		tmp = tmp->next;
+
+		/*
+		 * Make sure we don't do the last one (since it'll have the
+		 * TERM bit set) as well as we skip every so many TD's to
+		 * make sure it doesn't hog the bandwidth
+		 */
+		if (tmp != head && (count % DEPTH_INTERVAL) == (DEPTH_INTERVAL - 1))
+			td->link |= UHCI_PTR_DEPTH;
+
+		count++;
+	}
+
+	return 0;
+}
+
+/*
+ * uhci_get_current_frame_number()
+ *
+ * returns the current frame number for a USB bus/controller.
+ */
+static int uhci_get_current_frame_number(struct usb_device *dev)
+{
+	struct uhci *uhci = (struct uhci *)dev->bus->hcpriv;
+
+	return inw(uhci->io_addr + USBFRNUM);
+}
+
+struct usb_operations uhci_device_operations = {
+	uhci_alloc_dev,
+	uhci_free_dev,
+	uhci_get_current_frame_number,
+	uhci_submit_urb,
+	uhci_unlink_urb
+};
+
+/* Virtual Root Hub */
+
+static __u8 root_hub_dev_des[] =
+{
+ 	0x12,			/*  __u8  bLength; */
+	0x01,			/*  __u8  bDescriptorType; Device */
+	0x00,			/*  __u16 bcdUSB; v1.0 */
+	0x01,
+	0x09,			/*  __u8  bDeviceClass; HUB_CLASSCODE */
+	0x00,			/*  __u8  bDeviceSubClass; */
+	0x00,			/*  __u8  bDeviceProtocol; */
+	0x08,			/*  __u8  bMaxPacketSize0; 8 Bytes */
+	0x00,			/*  __u16 idVendor; */
+	0x00,
+	0x00,			/*  __u16 idProduct; */
+	0x00,
+	0x00,			/*  __u16 bcdDevice; */
+	0x00,
+	0x00,			/*  __u8  iManufacturer; */
+	0x02,			/*  __u8  iProduct; */
+	0x01,			/*  __u8  iSerialNumber; */
+	0x01			/*  __u8  bNumConfigurations; */
+};
+
+
+/* Configuration descriptor */
+static __u8 root_hub_config_des[] =
+{
+	0x09,			/*  __u8  bLength; */
+	0x02,			/*  __u8  bDescriptorType; Configuration */
+	0x19,			/*  __u16 wTotalLength; */
+	0x00,
+	0x01,			/*  __u8  bNumInterfaces; */
+	0x01,			/*  __u8  bConfigurationValue; */
+	0x00,			/*  __u8  iConfiguration; */
+	0x40,			/*  __u8  bmAttributes;
+					Bit 7: Bus-powered, 6: Self-powered,
+					Bit 5 Remote-wakeup, 4..0: resvd */
+	0x00,			/*  __u8  MaxPower; */
+
+	/* interface */
+	0x09,			/*  __u8  if_bLength; */
+	0x04,			/*  __u8  if_bDescriptorType; Interface */
+	0x00,			/*  __u8  if_bInterfaceNumber; */
+	0x00,			/*  __u8  if_bAlternateSetting; */
+	0x01,			/*  __u8  if_bNumEndpoints; */
+	0x09,			/*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
+	0x00,			/*  __u8  if_bInterfaceSubClass; */
+	0x00,			/*  __u8  if_bInterfaceProtocol; */
+	0x00,			/*  __u8  if_iInterface; */
+
+	/* endpoint */
+	0x07,			/*  __u8  ep_bLength; */
+	0x05,			/*  __u8  ep_bDescriptorType; Endpoint */
+	0x81,			/*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
+	0x03,			/*  __u8  ep_bmAttributes; Interrupt */
+	0x08,			/*  __u16 ep_wMaxPacketSize; 8 Bytes */
+	0x00,
+	0xff			/*  __u8  ep_bInterval; 255 ms */
+};
+
+static __u8 root_hub_hub_des[] =
+{
+	0x09,			/*  __u8  bLength; */
+	0x29,			/*  __u8  bDescriptorType; Hub-descriptor */
+	0x02,			/*  __u8  bNbrPorts; */
+	0x00,			/* __u16  wHubCharacteristics; */
+	0x00,
+	0x01,			/*  __u8  bPwrOn2pwrGood; 2ms */
+	0x00,			/*  __u8  bHubContrCurrent; 0 mA */
+	0x00,			/*  __u8  DeviceRemovable; *** 7 Ports max *** */
+	0xff			/*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
+};
+
+/* prepare Interrupt pipe transaction data; HUB INTERRUPT ENDPOINT */
+static int rh_send_irq(struct urb *urb)
+{
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+	unsigned int io_addr = uhci->io_addr;
+	unsigned long flags;
+	int i, len = 1;
+	__u16 data = 0;
+
+	spin_lock_irqsave(&urb->lock, flags);
+	for (i = 0; i < uhci->rh.numports; i++) {
+		data |= ((inw(io_addr + USBPORTSC1 + i * 2) & 0xa) > 0 ? (1 << (i + 1)) : 0);
+		len = (i + 1) / 8 + 1;
+	}
+
+	*(__u16 *) urb->transfer_buffer = cpu_to_le16(data);
+	urb->actual_length = len;
+	urbp->status = 0;
+
+	spin_unlock_irqrestore(&urb->lock, flags);
+
+	if ((data > 0) && (uhci->rh.send != 0)) {
+		dbg("root-hub INT complete: port1: %x port2: %x data: %x",
+			inw(io_addr + USBPORTSC1), inw(io_addr + USBPORTSC2), data);
+		uhci_call_completion(urb);
+	}
+
+	return 0;
+}
+
+/* Virtual Root Hub INTs are polled by this timer every "interval" ms */
+static int rh_init_int_timer(struct urb *urb);
+
+static void rh_int_timer_do(unsigned long ptr)
+{
+	struct urb *urb = (struct urb *)ptr;
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	struct list_head list, *tmp, *head;
+	unsigned long flags;
+
+	if (uhci->rh.send)
+		rh_send_irq(urb);
+
+	INIT_LIST_HEAD(&list);
+
+	spin_lock_irqsave(&uhci->urb_list_lock, flags);
+	head = &uhci->urb_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct urb *u = list_entry(tmp, struct urb, urb_list);
+		struct urb_priv *up = (struct urb_priv *)u->hcpriv;
+
+		tmp = tmp->next;
+
+		spin_lock(&u->lock);
+
+		/* Check if the FSBR timed out */
+		if (up->fsbr && !up->fsbr_timeout && time_after_eq(jiffies, up->fsbrtime + IDLE_TIMEOUT))
+			uhci_fsbr_timeout(uhci, u);
+
+		/* Check if the URB timed out */
+		if (u->timeout && time_after_eq(jiffies, up->inserttime + u->timeout)) {
+			list_del(&u->urb_list);
+			list_add_tail(&u->urb_list, &list);
+		}
+
+		spin_unlock(&u->lock);
+	}
+	spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
+
+	head = &list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct urb *u = list_entry(tmp, struct urb, urb_list);
+
+		tmp = tmp->next;
+
+		u->transfer_flags |= USB_ASYNC_UNLINK | USB_TIMEOUT_KILLED;
+		uhci_unlink_urb(u);
+	}
+
+	/* Really disable FSBR */
+	if (!uhci->fsbr && uhci->fsbrtimeout && time_after_eq(jiffies, uhci->fsbrtimeout)) {
+		uhci->fsbrtimeout = 0;
+		uhci->skel_term_qh->link = UHCI_PTR_TERM;
+	}
+
+	/* enter global suspend if nothing connected */
+	if (!uhci->is_suspended && !ports_active(uhci))
+		suspend_hc(uhci);
+
+	rh_init_int_timer(urb);
+}
+
+/* Root Hub INTs are polled by this timer */
+static int rh_init_int_timer(struct urb *urb)
+{
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+
+	uhci->rh.interval = urb->interval;
+	init_timer(&uhci->rh.rh_int_timer);
+	uhci->rh.rh_int_timer.function = rh_int_timer_do;
+	uhci->rh.rh_int_timer.data = (unsigned long)urb;
+	uhci->rh.rh_int_timer.expires = jiffies + (HZ * (urb->interval < 30 ? 30 : urb->interval)) / 1000;
+	add_timer(&uhci->rh.rh_int_timer);
+
+	return 0;
+}
+
+#define OK(x)			len = (x); break
+
+#define CLR_RH_PORTSTAT(x) \
+	status = inw(io_addr + USBPORTSC1 + 2 * (wIndex-1)); \
+	status = (status & 0xfff5) & ~(x); \
+	outw(status, io_addr + USBPORTSC1 + 2 * (wIndex-1))
+
+#define SET_RH_PORTSTAT(x) \
+	status = inw(io_addr + USBPORTSC1 + 2 * (wIndex-1)); \
+	status = (status & 0xfff5) | (x); \
+	outw(status, io_addr + USBPORTSC1 + 2 * (wIndex-1))
+
+
+/* Root Hub Control Pipe */
+static int rh_submit_urb(struct urb *urb)
+{
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+	unsigned int pipe = urb->pipe;
+	struct usb_ctrlrequest *cmd = (struct usb_ctrlrequest *)urb->setup_packet;
+	void *data = urb->transfer_buffer;
+	int leni = urb->transfer_buffer_length;
+	int len = 0;
+	int status = 0;
+	int stat = 0;
+	int i;
+	unsigned int io_addr = uhci->io_addr;
+	__u16 cstatus;
+	__u16 bmRType_bReq;
+	__u16 wValue;
+	__u16 wIndex;
+	__u16 wLength;
+
+	if (usb_pipetype(pipe) == PIPE_INTERRUPT) {
+		uhci->rh.urb = urb;
+		uhci->rh.send = 1;
+		uhci->rh.interval = urb->interval;
+		rh_init_int_timer(urb);
+
+		return -EINPROGRESS;
+	}
+
+	bmRType_bReq = cmd->bRequestType | cmd->bRequest << 8;
+	wValue = le16_to_cpu(cmd->wValue);
+	wIndex = le16_to_cpu(cmd->wIndex);
+	wLength = le16_to_cpu(cmd->wLength);
+
+	for (i = 0; i < 8; i++)
+		uhci->rh.c_p_r[i] = 0;
+
+	switch (bmRType_bReq) {
+		/* Request Destination:
+		   without flags: Device,
+		   RH_INTERFACE: interface,
+		   RH_ENDPOINT: endpoint,
+		   RH_CLASS means HUB here,
+		   RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
+		*/
+
+	case RH_GET_STATUS:
+		*(__u16 *)data = cpu_to_le16(1);
+		OK(2);
+	case RH_GET_STATUS | RH_INTERFACE:
+		*(__u16 *)data = cpu_to_le16(0);
+		OK(2);
+	case RH_GET_STATUS | RH_ENDPOINT:
+		*(__u16 *)data = cpu_to_le16(0);
+		OK(2);
+	case RH_GET_STATUS | RH_CLASS:
+		*(__u32 *)data = cpu_to_le32(0);
+		OK(4);		/* hub power */
+	case RH_GET_STATUS | RH_OTHER | RH_CLASS:
+		status = inw(io_addr + USBPORTSC1 + 2 * (wIndex - 1));
+		cstatus = ((status & USBPORTSC_CSC) >> (1 - 0)) |
+			((status & USBPORTSC_PEC) >> (3 - 1)) |
+			(uhci->rh.c_p_r[wIndex - 1] << (0 + 4));
+			status = (status & USBPORTSC_CCS) |
+			((status & USBPORTSC_PE) >> (2 - 1)) |
+			((status & USBPORTSC_SUSP) >> (12 - 2)) |
+			((status & USBPORTSC_PR) >> (9 - 4)) |
+			(1 << 8) |      /* power on */
+			((status & USBPORTSC_LSDA) << (-8 + 9));
+
+		*(__u16 *)data = cpu_to_le16(status);
+		*(__u16 *)(data + 2) = cpu_to_le16(cstatus);
+		OK(4);
+	case RH_CLEAR_FEATURE | RH_ENDPOINT:
+		switch (wValue) {
+		case RH_ENDPOINT_STALL:
+			OK(0);
+		}
+		break;
+	case RH_CLEAR_FEATURE | RH_CLASS:
+		switch (wValue) {
+		case RH_C_HUB_OVER_CURRENT:
+			OK(0);	/* hub power over current */
+		}
+		break;
+	case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
+		switch (wValue) {
+		case RH_PORT_ENABLE:
+			CLR_RH_PORTSTAT(USBPORTSC_PE);
+			OK(0);
+		case RH_PORT_SUSPEND:
+			CLR_RH_PORTSTAT(USBPORTSC_SUSP);
+			OK(0);
+		case RH_PORT_POWER:
+			OK(0);	/* port power */
+		case RH_C_PORT_CONNECTION:
+			SET_RH_PORTSTAT(USBPORTSC_CSC);
+			OK(0);
+		case RH_C_PORT_ENABLE:
+			SET_RH_PORTSTAT(USBPORTSC_PEC);
+			OK(0);
+		case RH_C_PORT_SUSPEND:
+			/*** WR_RH_PORTSTAT(RH_PS_PSSC); */
+			OK(0);
+		case RH_C_PORT_OVER_CURRENT:
+			OK(0);	/* port power over current */
+		case RH_C_PORT_RESET:
+			uhci->rh.c_p_r[wIndex - 1] = 0;
+			OK(0);
+		}
+		break;
+	case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
+		switch (wValue) {
+		case RH_PORT_SUSPEND:
+			SET_RH_PORTSTAT(USBPORTSC_SUSP);
+			OK(0);
+		case RH_PORT_RESET:
+			SET_RH_PORTSTAT(USBPORTSC_PR);
+			mdelay(50);	/* USB v1.1 7.1.7.3 */
+			uhci->rh.c_p_r[wIndex - 1] = 1;
+			CLR_RH_PORTSTAT(USBPORTSC_PR);
+			udelay(10);
+			SET_RH_PORTSTAT(USBPORTSC_PE);
+			mdelay(10);
+			SET_RH_PORTSTAT(0xa);
+			OK(0);
+		case RH_PORT_POWER:
+			OK(0); /* port power ** */
+		case RH_PORT_ENABLE:
+			SET_RH_PORTSTAT(USBPORTSC_PE);
+			OK(0);
+		}
+		break;
+	case RH_SET_ADDRESS:
+		uhci->rh.devnum = wValue;
+		OK(0);
+	case RH_GET_DESCRIPTOR:
+		switch ((wValue & 0xff00) >> 8) {
+		case 0x01:	/* device descriptor */
+			len = min_t(unsigned int, leni,
+				  min_t(unsigned int,
+				      sizeof(root_hub_dev_des), wLength));
+			memcpy(data, root_hub_dev_des, len);
+			OK(len);
+		case 0x02:	/* configuration descriptor */
+			len = min_t(unsigned int, leni,
+				  min_t(unsigned int,
+				      sizeof(root_hub_config_des), wLength));
+			memcpy (data, root_hub_config_des, len);
+			OK(len);
+		case 0x03:	/* string descriptors */
+			len = usb_root_hub_string (wValue & 0xff,
+				uhci->io_addr, "UHCI-alt",
+				data, wLength);
+			if (len > 0) {
+				OK(min_t(int, leni, len));
+			} else 
+				stat = -EPIPE;
+		}
+		break;
+	case RH_GET_DESCRIPTOR | RH_CLASS:
+		root_hub_hub_des[2] = uhci->rh.numports;
+		len = min_t(unsigned int, leni,
+			  min_t(unsigned int, sizeof(root_hub_hub_des), wLength));
+		memcpy(data, root_hub_hub_des, len);
+		OK(len);
+	case RH_GET_CONFIGURATION:
+		*(__u8 *)data = 0x01;
+		OK(1);
+	case RH_SET_CONFIGURATION:
+		OK(0);
+	case RH_GET_INTERFACE | RH_INTERFACE:
+		*(__u8 *)data = 0x00;
+		OK(1);
+	case RH_SET_INTERFACE | RH_INTERFACE:
+		OK(0);
+	default:
+		stat = -EPIPE;
+	}
+
+	urb->actual_length = len;
+
+	return stat;
+}
+
+/*
+ * MUST be called with urb->lock acquired
+ */
+static int rh_unlink_urb(struct urb *urb)
+{
+	struct uhci *uhci = (struct uhci *)urb->dev->bus->hcpriv;
+
+	if (uhci->rh.urb == urb) {
+		urb->status = -ENOENT;
+		uhci->rh.send = 0;
+		uhci->rh.urb = NULL;
+		del_timer(&uhci->rh.rh_int_timer);
+	}
+	return 0;
+}
+
+static void uhci_free_pending_qhs(struct uhci *uhci)
+{
+	struct list_head *tmp, *head;
+	unsigned long flags;
+
+	spin_lock_irqsave(&uhci->qh_remove_list_lock, flags);
+	head = &uhci->qh_remove_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct uhci_qh *qh = list_entry(tmp, struct uhci_qh, remove_list);
+
+		tmp = tmp->next;
+
+		list_del_init(&qh->remove_list);
+
+		uhci_free_qh(uhci, qh);
+	}
+	spin_unlock_irqrestore(&uhci->qh_remove_list_lock, flags);
+}
+
+static void uhci_call_completion(struct urb *urb)
+{
+	struct urb_priv *urbp;
+	struct usb_device *dev = urb->dev;
+	struct uhci *uhci = (struct uhci *)dev->bus->hcpriv;
+	int is_ring = 0, killed, resubmit_interrupt, status;
+	struct urb *nurb;
+	unsigned long flags;
+
+	spin_lock_irqsave(&urb->lock, flags);
+
+	urbp = (struct urb_priv *)urb->hcpriv;
+	if (!urbp || !urb->dev) {
+		spin_unlock_irqrestore(&urb->lock, flags);
+		return;
+	}
+
+	killed = (urb->status == -ENOENT || urb->status == -ECONNABORTED ||
+			urb->status == -ECONNRESET);
+	resubmit_interrupt = (usb_pipetype(urb->pipe) == PIPE_INTERRUPT &&
+			urb->interval);
+
+	nurb = urb->next;
+	if (nurb && !killed) {
+		int count = 0;
+
+		while (nurb && nurb != urb && count < MAX_URB_LOOP) {
+			if (nurb->status == -ENOENT ||
+			    nurb->status == -ECONNABORTED ||
+			    nurb->status == -ECONNRESET) {
+				killed = 1;
+				break;
+			}
+
+			nurb = nurb->next;
+			count++;
+		}
+
+		if (count == MAX_URB_LOOP)
+			err("uhci_call_completion: too many linked URB's, loop? (first loop)");
+
+		/* Check to see if chain is a ring */
+		is_ring = (nurb == urb);
+	}
+
+	if (urbp->transfer_buffer_dma_handle)
+		pci_dma_sync_single(uhci->dev, urbp->transfer_buffer_dma_handle,
+			urb->transfer_buffer_length, usb_pipein(urb->pipe) ?
+			PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
+
+	if (urbp->setup_packet_dma_handle)
+		pci_dma_sync_single(uhci->dev, urbp->setup_packet_dma_handle,
+			sizeof(struct usb_ctrlrequest), PCI_DMA_TODEVICE);
+
+	status = urbp->status;
+	if (!resubmit_interrupt || killed)
+		/* We don't need urb_priv anymore */
+		uhci_destroy_urb_priv(urb);
+
+	if (!killed)
+		urb->status = status;
+
+	urb->dev = NULL;
+	spin_unlock_irqrestore(&urb->lock, flags);
+
+	if (urb->complete)
+		urb->complete(urb);
+
+	if (resubmit_interrupt)
+		/* Recheck the status. The completion handler may have */
+		/*  unlinked the resubmitting interrupt URB */
+		killed = (urb->status == -ENOENT ||
+			  urb->status == -ECONNABORTED ||
+			  urb->status == -ECONNRESET);
+
+	if (resubmit_interrupt && !killed) {
+		urb->dev = dev;
+		uhci_reset_interrupt(urb);
+	} else {
+		if (is_ring && !killed) {
+			urb->dev = dev;
+			uhci_submit_urb(urb);
+		} else {
+			/* We decrement the usage count after we're done */
+			/*  with everything */
+			usb_dec_dev_use(dev);
+		}
+	}
+}
+
+static void uhci_finish_completion(struct uhci *uhci)
+{
+	struct list_head *tmp, *head;
+	unsigned long flags;
+
+	spin_lock_irqsave(&uhci->complete_list_lock, flags);
+	head = &uhci->complete_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct urb_priv *urbp = list_entry(tmp, struct urb_priv, complete_list);
+		struct urb *urb = urbp->urb;
+
+		list_del_init(&urbp->complete_list);
+		spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
+
+		uhci_call_completion(urb);
+
+		spin_lock_irqsave(&uhci->complete_list_lock, flags);
+		head = &uhci->complete_list;
+		tmp = head->next;
+	}
+	spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
+}
+
+static void uhci_remove_pending_qhs(struct uhci *uhci)
+{
+	struct list_head *tmp, *head;
+	unsigned long flags;
+
+	spin_lock_irqsave(&uhci->urb_remove_list_lock, flags);
+	head = &uhci->urb_remove_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct urb *urb = list_entry(tmp, struct urb, urb_list);
+		struct urb_priv *urbp = (struct urb_priv *)urb->hcpriv;
+
+		tmp = tmp->next;
+
+		list_del_init(&urb->urb_list);
+
+		urbp->status = urb->status = -ECONNRESET;
+
+		uhci_add_complete(urb);
+	}
+	spin_unlock_irqrestore(&uhci->urb_remove_list_lock, flags);
+}
+
+static void uhci_interrupt(int irq, void *__uhci, struct pt_regs *regs)
+{
+	struct uhci *uhci = __uhci;
+	unsigned int io_addr = uhci->io_addr;
+	unsigned short status;
+	struct list_head *tmp, *head;
+
+	/*
+	 * Read the interrupt status, and write it back to clear the
+	 * interrupt cause
+	 */
+	status = inw(io_addr + USBSTS);
+	if (!status)	/* shared interrupt, not mine */
+		return;
+	outw(status, io_addr + USBSTS);		/* Clear it */
+
+	if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
+		if (status & USBSTS_HSE)
+			err("%x: host system error, PCI problems?", io_addr);
+		if (status & USBSTS_HCPE)
+			err("%x: host controller process error. something bad happened", io_addr);
+		if ((status & USBSTS_HCH) && !uhci->is_suspended) {
+			err("%x: host controller halted. very bad", io_addr);
+			/* FIXME: Reset the controller, fix the offending TD */
+		}
+	}
+
+	if (status & USBSTS_RD)
+		wakeup_hc(uhci);
+
+	uhci_free_pending_qhs(uhci);
+
+	uhci_remove_pending_qhs(uhci);
+
+	uhci_clear_next_interrupt(uhci);
+
+	/* Walk the list of pending URB's to see which ones completed */
+	spin_lock(&uhci->urb_list_lock);
+	head = &uhci->urb_list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct urb *urb = list_entry(tmp, struct urb, urb_list);
+
+		tmp = tmp->next;
+
+		/* Checks the status and does all of the magic necessary */
+		uhci_transfer_result(uhci, urb);
+	}
+	spin_unlock(&uhci->urb_list_lock);
+
+	uhci_finish_completion(uhci);
+}
+
+static void reset_hc(struct uhci *uhci)
+{
+	unsigned int io_addr = uhci->io_addr;
+
+	/* Global reset for 50ms */
+	outw(USBCMD_GRESET, io_addr + USBCMD);
+	wait_ms(50);
+	outw(0, io_addr + USBCMD);
+	wait_ms(10);
+}
+
+static void suspend_hc(struct uhci *uhci)
+{
+	unsigned int io_addr = uhci->io_addr;
+
+	dbg("%x: suspend_hc", io_addr);
+
+	outw(USBCMD_EGSM, io_addr + USBCMD);
+
+	uhci->is_suspended = 1;
+}
+
+static void wakeup_hc(struct uhci *uhci)
+{
+	unsigned int io_addr = uhci->io_addr;
+	unsigned int status;
+
+	dbg("%x: wakeup_hc", io_addr);
+
+	outw(0, io_addr + USBCMD);
+	
+	/* wait for EOP to be sent */
+	status = inw(io_addr + USBCMD);
+	while (status & USBCMD_FGR)
+		status = inw(io_addr + USBCMD);
+
+	uhci->is_suspended = 0;
+
+	/* Run and mark it configured with a 64-byte max packet */
+	outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
+}
+
+static int ports_active(struct uhci *uhci)
+{
+	unsigned int io_addr = uhci->io_addr;
+	int connection = 0;
+	int i;
+
+	for (i = 0; i < uhci->rh.numports; i++)
+		connection |= (inw(io_addr + USBPORTSC1 + i * 2) & 0x1);
+
+	return connection;
+}
+
+static void start_hc(struct uhci *uhci)
+{
+	unsigned int io_addr = uhci->io_addr;
+	int timeout = 1000;
+
+	/*
+	 * Reset the HC - this will force us to get a
+	 * new notification of any already connected
+	 * ports due to the virtual disconnect that it
+	 * implies.
+	 */
+	outw(USBCMD_HCRESET, io_addr + USBCMD);
+	while (inw(io_addr + USBCMD) & USBCMD_HCRESET) {
+		if (!--timeout) {
+			printk(KERN_ERR "uhci: USBCMD_HCRESET timed out!\n");
+			break;
+		}
+	}
+
+	/* Turn on all interrupts */
+	outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
+		io_addr + USBINTR);
+
+	/* Start at frame 0 */
+	outw(0, io_addr + USBFRNUM);
+	outl(uhci->fl->dma_handle, io_addr + USBFLBASEADD);
+
+	/* Run and mark it configured with a 64-byte max packet */
+	outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
+}
+
+#ifdef CONFIG_PROC_FS
+static int uhci_num = 0;
+#endif
+
+static void free_uhci(struct uhci *uhci)
+{
+	kfree(uhci);
+}
+
+/*
+ * De-allocate all resources..
+ */
+static void release_uhci(struct uhci *uhci)
+{
+	int i;
+#ifdef CONFIG_PROC_FS
+	char buf[8];
+#endif
+
+	if (uhci->irq >= 0) {
+		free_irq(uhci->irq, uhci);
+		uhci->irq = -1;
+	}
+
+	for (i = 0; i < UHCI_NUM_SKELQH; i++)
+		if (uhci->skelqh[i]) {
+			uhci_free_qh(uhci, uhci->skelqh[i]);
+			uhci->skelqh[i] = NULL;
+		}
+
+	for (i = 0; i < UHCI_NUM_SKELTD; i++)
+		if (uhci->skeltd[i]) {
+			uhci_free_td(uhci, uhci->skeltd[i]);
+			uhci->skeltd[i] = NULL;
+		}
+
+	if (uhci->qh_pool) {
+		pci_pool_destroy(uhci->qh_pool);
+		uhci->qh_pool = NULL;
+	}
+
+	if (uhci->td_pool) {
+		pci_pool_destroy(uhci->td_pool);
+		uhci->td_pool = NULL;
+	}
+
+	if (uhci->fl) {
+		pci_free_consistent(uhci->dev, sizeof(*uhci->fl), uhci->fl, uhci->fl->dma_handle);
+		uhci->fl = NULL;
+	}
+
+	if (uhci->bus) {
+		usb_free_bus(uhci->bus);
+		uhci->bus = NULL;
+	}
+
+#ifdef CONFIG_PROC_FS
+	if (uhci->proc_entry) {
+		sprintf(buf, "hc%d", uhci->num);
+
+		remove_proc_entry(buf, uhci_proc_root);
+		uhci->proc_entry = NULL;
+	}
+#endif
+
+	free_uhci(uhci);
+}
+
+/*
+ * Allocate a frame list, and then setup the skeleton
+ *
+ * The hardware doesn't really know any difference
+ * in the queues, but the order does matter for the
+ * protocols higher up. The order is:
+ *
+ *  - any isochronous events handled before any
+ *    of the queues. We don't do that here, because
+ *    we'll create the actual TD entries on demand.
+ *  - The first queue is the interrupt queue.
+ *  - The second queue is the control queue, split into low and high speed
+ *  - The third queue is bulk queue.
+ *  - The fourth queue is the bandwidth reclamation queue, which loops back
+ *    to the high speed control queue.
+ */
+static int alloc_uhci(struct pci_dev *dev, unsigned int io_addr, unsigned int io_size)
+{
+	struct uhci *uhci;
+	int retval;
+	char buf[8], *bufp = buf;
+	int i, port;
+	struct usb_bus *bus;
+	dma_addr_t dma_handle;
+#ifdef CONFIG_PROC_FS
+	struct proc_dir_entry *ent;
+#endif
+
+	retval = -ENODEV;
+	if (pci_enable_device(dev) < 0) {
+		err("couldn't enable PCI device");
+		goto err_enable_device;
+	}
+
+	if (!dev->irq) {
+		err("found UHCI device with no IRQ assigned. check BIOS settings!");
+		goto err_invalid_irq;
+	}
+
+	if (!pci_dma_supported(dev, 0xFFFFFFFF)) {
+		err("PCI subsystem doesn't support 32 bit addressing?");
+		goto err_pci_dma_supported;
+	}
+
+	retval = -EBUSY;
+	if (!request_region(io_addr, io_size, "usb-uhci")) {
+		err("couldn't allocate I/O range %x - %x", io_addr,
+			io_addr + io_size - 1);
+		goto err_request_region;
+	}
+
+	pci_set_master(dev);
+
+#ifndef __sparc__
+	sprintf(buf, "%d", dev->irq);
+#else
+	bufp = __irq_itoa(dev->irq);
+#endif
+	printk(KERN_INFO __FILE__ ": USB UHCI at I/O 0x%x, IRQ %s\n",
+		io_addr, bufp);
+
+	if (pci_set_dma_mask(dev, 0xFFFFFFFF)) {
+		err("couldn't set PCI dma mask");
+		retval = -ENODEV;
+		goto err_pci_set_dma_mask;
+	}
+
+	uhci = kmalloc(sizeof(*uhci), GFP_KERNEL);
+	if (!uhci) {
+		err("couldn't allocate uhci structure");
+		retval = -ENOMEM;
+		goto err_alloc_uhci;
+	}
+
+	uhci->dev = dev;
+	uhci->irq = dev->irq;
+	uhci->io_addr = io_addr;
+	uhci->io_size = io_size;
+	pci_set_drvdata(dev, uhci);
+
+#ifdef CONFIG_PROC_FS
+	uhci->num = uhci_num++;
+
+	sprintf(buf, "hc%d", uhci->num);
+
+	ent = create_proc_entry(buf, S_IFREG|S_IRUGO|S_IWUSR, uhci_proc_root);
+	if (!ent) {
+		err("couldn't create uhci proc entry");
+		retval = -ENOMEM;
+		goto err_create_proc_entry;
+	}
+
+	ent->data = uhci;
+	ent->proc_fops = &uhci_proc_operations;
+	ent->size = 0;
+	uhci->proc_entry = ent;
+#endif
+
+	/* Reset here so we don't get any interrupts from an old setup */
+	/*  or broken setup */
+	reset_hc(uhci);
+
+	uhci->fsbr = 0;
+	uhci->fsbrtimeout = 0;
+
+	uhci->is_suspended = 0;
+
+	spin_lock_init(&uhci->qh_remove_list_lock);
+	INIT_LIST_HEAD(&uhci->qh_remove_list);
+
+	spin_lock_init(&uhci->urb_remove_list_lock);
+	INIT_LIST_HEAD(&uhci->urb_remove_list);
+
+	spin_lock_init(&uhci->urb_list_lock);
+	INIT_LIST_HEAD(&uhci->urb_list);
+
+	spin_lock_init(&uhci->complete_list_lock);
+	INIT_LIST_HEAD(&uhci->complete_list);
+
+	spin_lock_init(&uhci->frame_list_lock);
+
+	/* We need exactly one page (per UHCI specs), how convenient */
+	/* We assume that one page is atleast 4k (1024 frames * 4 bytes) */
+#if PAGE_SIZE < (4 * 1024)
+#error PAGE_SIZE is not atleast 4k
+#endif
+	uhci->fl = pci_alloc_consistent(uhci->dev, sizeof(*uhci->fl), &dma_handle);
+	if (!uhci->fl) {
+		err("unable to allocate consistent memory for frame list");
+		goto err_alloc_fl;
+	}
+
+	memset((void *)uhci->fl, 0, sizeof(*uhci->fl));
+
+	uhci->fl->dma_handle = dma_handle;
+
+	uhci->td_pool = pci_pool_create("uhci_td", uhci->dev,
+		sizeof(struct uhci_td), 16, 0, GFP_DMA | GFP_ATOMIC);
+	if (!uhci->td_pool) {
+		err("unable to create td pci_pool");
+		goto err_create_td_pool;
+	}
+
+	uhci->qh_pool = pci_pool_create("uhci_qh", uhci->dev,
+		sizeof(struct uhci_qh), 16, 0, GFP_DMA | GFP_ATOMIC);
+	if (!uhci->qh_pool) {
+		err("unable to create qh pci_pool");
+		goto err_create_qh_pool;
+	}
+
+	bus = usb_alloc_bus(&uhci_device_operations);
+	if (!bus) {
+		err("unable to allocate bus");
+		goto err_alloc_bus;
+	}
+
+	uhci->bus = bus;
+	bus->bus_name = dev->slot_name;
+	bus->hcpriv = uhci;
+
+	usb_register_bus(uhci->bus);
+
+	/* Initialize the root hub */
+
+	/* UHCI specs says devices must have 2 ports, but goes on to say */
+	/*  they may have more but give no way to determine how many they */
+	/*  have. However, according to the UHCI spec, Bit 7 is always set */
+	/*  to 1. So we try to use this to our advantage */
+	for (port = 0; port < (uhci->io_size - 0x10) / 2; port++) {
+		unsigned int portstatus;
+
+		portstatus = inw(uhci->io_addr + 0x10 + (port * 2));
+		if (!(portstatus & 0x0080))
+			break;
+	}
+	if (debug)
+		info("detected %d ports", port);
+
+	/* This is experimental so anything less than 2 or greater than 8 is */
+	/*  something weird and we'll ignore it */
+	if (port < 2 || port > 8) {
+		info("port count misdetected? forcing to 2 ports");
+		port = 2;
+	}
+
+	uhci->rh.numports = port;
+
+	uhci->bus->root_hub = uhci->rh.dev = usb_alloc_dev(NULL, uhci->bus);
+	if (!uhci->rh.dev) {
+		err("unable to allocate root hub");
+		goto err_alloc_root_hub;
+	}
+
+	uhci->skeltd[0] = uhci_alloc_td(uhci, uhci->rh.dev);
+	if (!uhci->skeltd[0]) {
+		err("unable to allocate TD 0");
+		goto err_alloc_skeltd;
+	}
+
+	/*
+	 * 9 Interrupt queues; link int2 to int1, int4 to int2, etc
+	 * then link int1 to control and control to bulk
+	 */
+	for (i = 1; i < 9; i++) {
+		struct uhci_td *td;
+
+		td = uhci->skeltd[i] = uhci_alloc_td(uhci, uhci->rh.dev);
+		if (!td) {
+			err("unable to allocate TD %d", i);
+			goto err_alloc_skeltd;
+		}
+
+		uhci_fill_td(td, 0, (UHCI_NULL_DATA_SIZE << 21) | (0x7f << 8) | USB_PID_IN, 0);
+		td->link = uhci->skeltd[i - 1]->dma_handle;
+	}
+
+	uhci->skel_term_td = uhci_alloc_td(uhci, uhci->rh.dev);
+	if (!uhci->skel_term_td) {
+		err("unable to allocate skel TD term");
+		goto err_alloc_skeltd;
+	}
+
+	for (i = 0; i < UHCI_NUM_SKELQH; i++) {
+		uhci->skelqh[i] = uhci_alloc_qh(uhci, uhci->rh.dev);
+		if (!uhci->skelqh[i]) {
+			err("unable to allocate QH %d", i);
+			goto err_alloc_skelqh;
+		}
+	}
+
+	uhci_fill_td(uhci->skel_int1_td, 0, (UHCI_NULL_DATA_SIZE << 21) | (0x7f << 8) | USB_PID_IN, 0);
+	uhci->skel_int1_td->link = uhci->skel_ls_control_qh->dma_handle | UHCI_PTR_QH;
+
+	uhci->skel_ls_control_qh->link = uhci->skel_hs_control_qh->dma_handle | UHCI_PTR_QH;
+	uhci->skel_ls_control_qh->element = UHCI_PTR_TERM;
+
+	uhci->skel_hs_control_qh->link = uhci->skel_bulk_qh->dma_handle | UHCI_PTR_QH;
+	uhci->skel_hs_control_qh->element = UHCI_PTR_TERM;
+
+	uhci->skel_bulk_qh->link = uhci->skel_term_qh->dma_handle | UHCI_PTR_QH;
+	uhci->skel_bulk_qh->element = UHCI_PTR_TERM;
+
+	/* This dummy TD is to work around a bug in Intel PIIX controllers */
+	uhci_fill_td(uhci->skel_term_td, 0, (UHCI_NULL_DATA_SIZE << 21) | (0x7f << 8) | USB_PID_IN, 0);
+	uhci->skel_term_td->link = uhci->skel_term_td->dma_handle;
+
+	uhci->skel_term_qh->link = UHCI_PTR_TERM;
+	uhci->skel_term_qh->element = uhci->skel_term_td->dma_handle;
+
+	/*
+	 * Fill the frame list: make all entries point to
+	 * the proper interrupt queue.
+	 *
+	 * This is probably silly, but it's a simple way to
+	 * scatter the interrupt queues in a way that gives
+	 * us a reasonable dynamic range for irq latencies.
+	 */
+	for (i = 0; i < UHCI_NUMFRAMES; i++) {
+		int irq = 0;
+
+		if (i & 1) {
+			irq++;
+			if (i & 2) {
+				irq++;
+				if (i & 4) { 
+					irq++;
+					if (i & 8) { 
+						irq++;
+						if (i & 16) {
+							irq++;
+							if (i & 32) {
+								irq++;
+								if (i & 64)
+									irq++;
+							}
+						}
+					}
+				}
+			}
+		}
+
+		/* Only place we don't use the frame list routines */
+		uhci->fl->frame[i] =  uhci->skeltd[irq]->dma_handle;
+	}
+
+	start_hc(uhci);
+
+	if (request_irq(dev->irq, uhci_interrupt, SA_SHIRQ, "usb-uhci", uhci))
+		goto err_request_irq;
+
+	/* disable legacy emulation */
+	pci_write_config_word(uhci->dev, USBLEGSUP, USBLEGSUP_DEFAULT);
+
+	usb_connect(uhci->rh.dev);
+
+	if (usb_new_device(uhci->rh.dev) != 0) {
+		err("unable to start root hub");
+		retval = -ENOMEM;
+		goto err_start_root_hub;
+	}
+
+	return 0;
+
+/*
+ * error exits:
+ */
+err_start_root_hub:
+	free_irq(uhci->irq, uhci);
+	uhci->irq = -1;
+
+err_request_irq:
+	for (i = 0; i < UHCI_NUM_SKELQH; i++)
+		if (uhci->skelqh[i]) {
+			uhci_free_qh(uhci, uhci->skelqh[i]);
+			uhci->skelqh[i] = NULL;
+		}
+
+err_alloc_skelqh:
+	for (i = 0; i < UHCI_NUM_SKELTD; i++)
+		if (uhci->skeltd[i]) {
+			uhci_free_td(uhci, uhci->skeltd[i]);
+			uhci->skeltd[i] = NULL;
+		}
+
+err_alloc_skeltd:
+	usb_free_dev(uhci->rh.dev);
+	uhci->rh.dev = NULL;
+
+err_alloc_root_hub:
+	usb_free_bus(uhci->bus);
+	uhci->bus = NULL;
+
+err_alloc_bus:
+	pci_pool_destroy(uhci->qh_pool);
+	uhci->qh_pool = NULL;
+
+err_create_qh_pool:
+	pci_pool_destroy(uhci->td_pool);
+	uhci->td_pool = NULL;
+
+err_create_td_pool:
+	pci_free_consistent(uhci->dev, sizeof(*uhci->fl), uhci->fl, uhci->fl->dma_handle);
+	uhci->fl = NULL;
+
+err_alloc_fl:
+#ifdef CONFIG_PROC_FS
+	remove_proc_entry(buf, uhci_proc_root);
+	uhci->proc_entry = NULL;
+
+err_create_proc_entry:
+	free_uhci(uhci);
+#endif
+
+err_alloc_uhci:
+
+err_pci_set_dma_mask:
+	release_region(io_addr, io_size);
+
+err_request_region:
+
+err_pci_dma_supported:
+
+err_invalid_irq:
+
+err_enable_device:
+
+	return retval;
+}
+
+static int __devinit uhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	int i;
+
+	/* Search for the IO base address.. */
+	for (i = 0; i < 6; i++) {
+		unsigned int io_addr = pci_resource_start(dev, i);
+		unsigned int io_size = pci_resource_len(dev, i);
+
+		/* IO address? */
+		if (!(pci_resource_flags(dev, i) & IORESOURCE_IO))
+			continue;
+
+		return alloc_uhci(dev, io_addr, io_size);
+	}
+
+	return -ENODEV;
+}
+
+static void __devexit uhci_pci_remove(struct pci_dev *dev)
+{
+	struct uhci *uhci = pci_get_drvdata(dev);
+
+	if (uhci->bus->root_hub)
+		usb_disconnect(&uhci->bus->root_hub);
+
+	usb_deregister_bus(uhci->bus);
+
+	/*
+	 * At this point, we're guaranteed that no new connects can be made
+	 * to this bus since there are no more parents
+	 */
+	uhci_free_pending_qhs(uhci);
+	uhci_remove_pending_qhs(uhci);
+
+	reset_hc(uhci);
+	release_region(uhci->io_addr, uhci->io_size);
+
+	uhci_free_pending_qhs(uhci);
+
+	release_uhci(uhci);
+}
+
+#ifdef CONFIG_PM
+static int uhci_pci_suspend(struct pci_dev *dev, u32 state)
+{
+	suspend_hc((struct uhci *) pci_get_drvdata(dev));
+	return 0;
+}
+
+static int uhci_pci_resume(struct pci_dev *dev)
+{
+	reset_hc((struct uhci *) pci_get_drvdata(dev));
+	start_hc((struct uhci *) pci_get_drvdata(dev));
+	return 0;
+}
+#endif
+
+static const struct pci_device_id __devinitdata uhci_pci_ids[] = { {
+
+	/* handle any USB UHCI controller */
+	class: 		((PCI_CLASS_SERIAL_USB << 8) | 0x00),
+	class_mask: 	~0,
+
+	/* no matter who makes it */
+	vendor:		PCI_ANY_ID,
+	device:		PCI_ANY_ID,
+	subvendor:	PCI_ANY_ID,
+	subdevice:	PCI_ANY_ID,
+
+	}, { /* end: all zeroes */ }
+};
+
+MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
+
+static struct pci_driver uhci_pci_driver = {
+	name:		"usb-uhci",
+	id_table:	uhci_pci_ids,
+
+	probe:		uhci_pci_probe,
+	remove:		__devexit_p(uhci_pci_remove),
+
+#ifdef	CONFIG_PM
+	suspend:	uhci_pci_suspend,
+	resume:		uhci_pci_resume,
+#endif	/* PM */
+};
+
+ 
+static int __init uhci_hcd_init(void)
+{
+	int retval = -ENOMEM;
+
+	info(DRIVER_DESC " " DRIVER_VERSION);
+
+	if (debug) {
+		errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
+		if (!errbuf)
+			goto errbuf_failed;
+	}
+
+#ifdef CONFIG_PROC_FS
+	uhci_proc_root = create_proc_entry("driver/uhci", S_IFDIR, 0);
+	if (!uhci_proc_root)
+		goto proc_failed;
+#endif
+
+	uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
+		sizeof(struct urb_priv), 0, 0, NULL, NULL);
+	if (!uhci_up_cachep)
+		goto up_failed;
+
+	retval = pci_module_init(&uhci_pci_driver);
+	if (retval)
+		goto init_failed;
+
+	return 0;
+
+init_failed:
+	if (kmem_cache_destroy(uhci_up_cachep))
+		printk(KERN_INFO "uhci: not all urb_priv's were freed\n");
+
+up_failed:
+
+#ifdef CONFIG_PROC_FS
+	remove_proc_entry("driver/uhci", 0);
+
+proc_failed:
+#endif
+	if (errbuf)
+		kfree(errbuf);
+
+errbuf_failed:
+
+	return retval;
+}
+
+static void __exit uhci_hcd_cleanup(void) 
+{
+	pci_unregister_driver(&uhci_pci_driver);
+	
+	if (kmem_cache_destroy(uhci_up_cachep))
+		printk(KERN_INFO "uhci: not all urb_priv's were freed\n");
+
+#ifdef CONFIG_PROC_FS
+	remove_proc_entry("driver/uhci", 0);
+#endif
+
+	if (errbuf)
+		kfree(errbuf);
+}
+
+module_init(uhci_hcd_init);
+module_exit(uhci_hcd_cleanup);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+