[Bluetooth] HCI USB driver update. Support for SCO over HCI USB.

URB and buffer managment rewrite.

drivers/bluetooth/Kconfig

@@ -13,11 +13,18 @@ config BT_HCIUSB
 	  Say Y here to compile support for Bluetooth USB devices into the
 	  kernel or say M to compile it as module (hci_usb).
 
+config BT_USB_SCO
+	bool "SCO over HCI USB support"
+	depends on BT_HCIUSB
+	help
+	  This option enables the SCO support in the HCI USB driver. You need this
+	  to transmit voice data with your Bluetooth USB device. 
+	  Say Y here to compile support for SCO over HCI USB.
+
 config BT_USB_ZERO_PACKET
 	bool "USB zero packet support"
 	depends on BT_HCIUSB
 	help
-	  Support for USB zero packets. 
 	  This option is provided only as a work around for buggy Bluetooth USB 
 	  devices. Do _not_ enable it unless you know for sure that your device 
 	  requires zero packets.

drivers/bluetooth/hci_usb.c

 /* 
-   BlueZ - Bluetooth protocol stack for Linux
+   HCI USB driver for Linux Bluetooth protocol stack (BlueZ)
    Copyright (C) 2000-2001 Qualcomm Incorporated
-
    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
 
+   Copyright (C) 2003 Maxim Krasnyansky <maxk@qualcomm.com>
+
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2 as
    published by the Free Software Foundation;
@@ -23,20 +24,17 @@
 */
 
 /*
- * Bluetooth HCI USB driver.
  * Based on original USB Bluetooth driver for Linux kernel
  *    Copyright (c) 2000 Greg Kroah-Hartman        <greg@kroah.com>
  *    Copyright (c) 2000 Mark Douglas Corner       <mcorner@umich.edu>
  *
  * $Id: hci_usb.c,v 1.8 2002/07/18 17:23:09 maxk Exp $    
  */
-#define VERSION "2.1"
+#define VERSION "2.4"
 
 #include <linux/config.h>
 #include <linux/module.h>
 
-#define __KERNEL_SYSCALLS__
-
 #include <linux/version.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
@@ -49,17 +47,15 @@
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/skbuff.h>
-#include <linux/kmod.h>
 
 #include <linux/usb.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
-#include "hci_usb.h"
 
-#define HCI_MAX_PENDING (HCI_MAX_BULK_RX + HCI_MAX_BULK_TX + 1)
+#include "hci_usb.h"
 
-#ifndef CONFIG_BT_HCIUSB_DEBUG
+#ifndef HCI_USB_DEBUG
 #undef  BT_DBG
 #define BT_DBG( A... )
 #undef  BT_DMP
@@ -67,8 +63,8 @@
 #endif
 
 #ifndef CONFIG_BT_USB_ZERO_PACKET
-#undef  URB_ZERO_PACKET
-#define URB_ZERO_PACKET 0
+#undef  USB_ZERO_PACKET
+#define USB_ZERO_PACKET 0
 #endif
 
 static struct usb_driver hci_usb_driver; 
@@ -80,6 +76,9 @@ static struct usb_device_id bluetooth_ids[] = {
 	/* Ericsson with non-standard id */
 	{ USB_DEVICE(0x0bdb, 0x1002) },
 
+	/* Bluetooth Ultraport Module from IBM */
+	{ USB_DEVICE(0x04bf, 0x030a) },
+
 	{ }	/* Terminating entry */
 };
 
@@ -92,108 +91,196 @@ static struct usb_device_id ignore_ids[] = {
 	{ }	/* Terminating entry */
 };
 
-static void hci_usb_interrupt(struct urb *urb, struct pt_regs *regs);
+struct _urb *_urb_alloc(int isoc, int gfp)
+{
+	struct _urb *_urb = kmalloc(sizeof(struct _urb) +
+				sizeof(struct usb_iso_packet_descriptor) * isoc, gfp);
+	if (_urb) {
+		memset(_urb, 0, sizeof(*_urb));
+		_urb->urb.count = (atomic_t)ATOMIC_INIT(1);
+		spin_lock_init(&_urb->urb.lock);
+	}
+	return _urb;
+}
+
+struct _urb *_urb_dequeue(struct _urb_queue *q)
+{
+	struct _urb *_urb = NULL;
+        unsigned long flags;
+        spin_lock_irqsave(&q->lock, flags);
+	{
+		struct list_head *head = &q->head;
+		struct list_head *next = head->next;
+		if (next != head) {
+			_urb = list_entry(next, struct _urb, list);
+			list_del(next); _urb->queue = NULL;
+		}
+	}
+	spin_unlock_irqrestore(&q->lock, flags);
+	return _urb;
+}
+
 static void hci_usb_rx_complete(struct urb *urb, struct pt_regs *regs);
 static void hci_usb_tx_complete(struct urb *urb, struct pt_regs *regs);
 
-static struct urb *hci_usb_get_completed(struct hci_usb *husb)
+#define __pending_tx(husb, type)  (&husb->pending_tx[type-1])
+#define __pending_q(husb, type)   (&husb->pending_q[type-1])
+#define __completed_q(husb, type) (&husb->completed_q[type-1])
+#define __transmit_q(husb, type)  (&husb->transmit_q[type-1])
+#define __reassembly(husb, type)  (husb->reassembly[type-1])
+
+static inline struct _urb *__get_completed(struct hci_usb *husb, int type)
 {
-	struct sk_buff *skb;
-	struct urb *urb = NULL;
+	return _urb_dequeue(__completed_q(husb, type)); 
+}
 
-	skb = skb_dequeue(&husb->completed_q);
-	if (skb) {
-		urb = ((struct hci_usb_scb *) skb->cb)->urb;
-		kfree_skb(skb);
-	}
+#ifdef CONFIG_BT_USB_SCO
+static void __fill_isoc_desc(struct urb *urb, int len, int mtu)
+{
+	int offset = 0, i;
 
-	BT_DBG("%s urb %p", husb->hdev.name, urb);
-	return urb;
+	BT_DBG("len %d mtu %d", len, mtu);
+
+	for (i=0; i < HCI_MAX_ISOC_FRAMES && len >= mtu; i++, offset += mtu, len -= mtu) {
+		urb->iso_frame_desc[i].offset = offset;
+		urb->iso_frame_desc[i].length = mtu;
+		BT_DBG("desc %d offset %d len %d", i, offset, mtu);
+	}
+	if (len && i < HCI_MAX_ISOC_FRAMES) {
+		urb->iso_frame_desc[i].offset = offset;
+		urb->iso_frame_desc[i].length = len;
+		BT_DBG("desc %d offset %d len %d", i, offset, len);
+		i++;
+	}
+	urb->number_of_packets = i;
 }
+#endif
 
-static int hci_usb_enable_intr(struct hci_usb *husb)
+static int hci_usb_intr_rx_submit(struct hci_usb *husb)
 {
+	struct _urb *_urb;
 	struct urb *urb;
-	int pipe, size;
+	int err, pipe, interval, size;
 	void *buf;
 
 	BT_DBG("%s", husb->hdev.name);
 
- 	if (!(urb = usb_alloc_urb(0, GFP_KERNEL)))
+        size = husb->intr_in_ep->desc.wMaxPacketSize;
+
+	buf = kmalloc(size, GFP_ATOMIC);
+	if (!buf)
 		return -ENOMEM;
 
-	if (!(buf = kmalloc(HCI_MAX_EVENT_SIZE, GFP_KERNEL))) {
-		usb_free_urb(urb);
+	_urb = _urb_alloc(0, GFP_ATOMIC);
+	if (!_urb) {
+		kfree(buf);
 		return -ENOMEM;
 	}
+	_urb->type = HCI_EVENT_PKT;
+	_urb_queue_tail(__pending_q(husb, _urb->type), _urb);
 
-	husb->intr_urb = urb;
-	
-        pipe = usb_rcvintpipe(husb->udev, husb->intr_ep);
-        size = usb_maxpacket(husb->udev, pipe, usb_pipeout(pipe));
-	usb_fill_int_urb(urb, husb->udev, pipe, buf, size, 
-			hci_usb_interrupt, husb, husb->intr_interval);
+	urb = &_urb->urb;
+	pipe     = usb_rcvintpipe(husb->udev, husb->intr_in_ep->desc.bEndpointAddress);
+	interval = husb->intr_in_ep->desc.bInterval;
+	usb_fill_int_urb(urb, husb->udev, pipe, buf, size, hci_usb_rx_complete, husb, interval);
 	
-	return usb_submit_urb(urb, GFP_KERNEL);
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err) {
+		BT_ERR("%s intr rx submit failed urb %p err %d",
+				husb->hdev.name, urb, err);
+		_urb_unlink(_urb);
+		_urb_free(_urb);
+		kfree(buf);
+	}
+	return err;
 }
 
-static int hci_usb_disable_intr(struct hci_usb *husb)
+static int hci_usb_bulk_rx_submit(struct hci_usb *husb)
 {
-	struct urb *urb = husb->intr_urb;
-	struct sk_buff *skb;
-
-	BT_DBG("%s", husb->hdev.name);
+	struct _urb *_urb;
+	struct urb *urb;
+	int err, pipe, size = HCI_MAX_FRAME_SIZE;
+	void *buf;
 
-	usb_unlink_urb(urb); usb_free_urb(urb);
-	husb->intr_urb = NULL;
+	buf = kmalloc(size, GFP_ATOMIC);
+	if (!buf)
+		return -ENOMEM;
 
-	skb = husb->intr_skb;
-	if (skb) {
-		husb->intr_skb = NULL;
-		kfree_skb(skb);
+	_urb = _urb_alloc(0, GFP_ATOMIC);
+	if (!_urb) {
+		kfree(buf);
+		return -ENOMEM;
 	}
+	_urb->type = HCI_ACLDATA_PKT;
+	_urb_queue_tail(__pending_q(husb, _urb->type), _urb);
 
-	return 0;
+	urb  = &_urb->urb;
+	pipe = usb_rcvbulkpipe(husb->udev, husb->bulk_in_ep->desc.bEndpointAddress);
+        usb_fill_bulk_urb(urb, husb->udev, pipe, buf, size, hci_usb_rx_complete, husb);
+        urb->transfer_flags = 0;
+
+	BT_DBG("%s urb %p", husb->hdev.name, urb);
+
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err) {
+		BT_ERR("%s bulk rx submit failed urb %p err %d",
+				husb->hdev.name, urb, err);
+		_urb_unlink(_urb);
+		_urb_free(_urb);
+		kfree(buf);
+	}
+	return err;
 }
 
-static int hci_usb_rx_submit(struct hci_usb *husb, struct urb *urb)
+#ifdef CONFIG_BT_USB_SCO
+static int hci_usb_isoc_rx_submit(struct hci_usb *husb)
 {
-	struct hci_usb_scb *scb;
-	struct sk_buff *skb;
-	int    pipe, size, err;
+	struct _urb *_urb;
+	struct urb *urb;
+	int err, mtu, size;
+	void *buf;
 
-	if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
-		return -ENOMEM;
+	mtu  = husb->isoc_in_ep->desc.wMaxPacketSize;
+        size = mtu * HCI_MAX_ISOC_FRAMES;
 
-        size = HCI_MAX_FRAME_SIZE;
+	buf = kmalloc(size, GFP_ATOMIC);
+	if (!buf)
+		return -ENOMEM;
 
-	if (!(skb = bt_skb_alloc(size, GFP_ATOMIC))) {
-		usb_free_urb(urb);
+	_urb = _urb_alloc(HCI_MAX_ISOC_FRAMES, GFP_ATOMIC);
+	if (!_urb) {
+		kfree(buf);
 		return -ENOMEM;
 	}
+	_urb->type = HCI_SCODATA_PKT;
+	_urb_queue_tail(__pending_q(husb, _urb->type), _urb);
 
-	BT_DBG("%s urb %p", husb->hdev.name, urb);
+	urb = &_urb->urb;
 
-	skb->dev = (void *) &husb->hdev;
-	skb->pkt_type = HCI_ACLDATA_PKT;
+	urb->context  = husb;
+	urb->dev      = husb->udev;
+	urb->pipe     = usb_rcvisocpipe(husb->udev, husb->isoc_in_ep->desc.bEndpointAddress);
+	urb->complete = hci_usb_rx_complete;
 
-	scb = (struct hci_usb_scb *) skb->cb;
-	scb->urb = urb;
+	urb->transfer_buffer_length = size;
+	urb->transfer_buffer = buf;
+	urb->transfer_flags  = URB_ISO_ASAP;
 
-        pipe = usb_rcvbulkpipe(husb->udev, husb->bulk_in_ep);
+	__fill_isoc_desc(urb, size, mtu);
 
-        usb_fill_bulk_urb(urb, husb->udev, pipe, skb->data, size, hci_usb_rx_complete, skb);
+	BT_DBG("%s urb %p", husb->hdev.name, urb);
 
-	skb_queue_tail(&husb->pending_q, skb);
 	err = usb_submit_urb(urb, GFP_ATOMIC);
 	if (err) {
-		BT_ERR("%s bulk rx submit failed urb %p err %d",
+		BT_ERR("%s isoc rx submit failed urb %p err %d",
 				husb->hdev.name, urb, err);
-		skb_unlink(skb);
-		usb_free_urb(urb);
+		_urb_unlink(_urb);
+		_urb_free(_urb);
+		kfree(buf);
 	}
 	return err;
 }
+#endif
 
 /* Initialize device */
 static int hci_usb_open(struct hci_dev *hdev)
@@ -209,13 +296,17 @@ static int hci_usb_open(struct hci_dev *hdev)
 
 	write_lock_irqsave(&husb->completion_lock, flags);
 
-	err = hci_usb_enable_intr(husb);
+	err = hci_usb_intr_rx_submit(husb);
 	if (!err) {
 		for (i = 0; i < HCI_MAX_BULK_RX; i++)
-			hci_usb_rx_submit(husb, NULL);
-	} else
-		clear_bit(HCI_RUNNING, &hdev->flags);
+			hci_usb_bulk_rx_submit(husb);
 
+#ifdef CONFIG_BT_USB_SCO
+		hci_usb_isoc_rx_submit(husb);
+#endif
+	} else {
+		clear_bit(HCI_RUNNING, &hdev->flags);
+	}
 
 	write_unlock_irqrestore(&husb->completion_lock, flags);
 	return err;
@@ -225,29 +316,52 @@ static int hci_usb_open(struct hci_dev *hdev)
 static int hci_usb_flush(struct hci_dev *hdev)
 {
 	struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
+	int i;
 
 	BT_DBG("%s", hdev->name);
 
-	skb_queue_purge(&husb->cmd_q);
-	skb_queue_purge(&husb->acl_q);
+	for (i=0; i < 4; i++)
+		skb_queue_purge(&husb->transmit_q[i]);
 	return 0;
 }
 
-static inline void hci_usb_unlink_urbs(struct hci_usb *husb)
+static void hci_usb_unlink_urbs(struct hci_usb *husb)
 {
-	struct sk_buff *skb;
-	struct urb *urb;
+	int i;
 
 	BT_DBG("%s", husb->hdev.name);
 
-	while ((skb = skb_dequeue(&husb->pending_q))) {
-		urb = ((struct hci_usb_scb *) skb->cb)->urb;
+	for (i=0; i < 4; i++) {
+		struct _urb *_urb;
+		struct urb *urb;
+
+		/* Kill pending requests */
+		while ((_urb = _urb_dequeue(&husb->pending_q[i]))) {
+			urb = &_urb->urb;
+			BT_DBG("%s unlinking _urb %p type %d urb %p", 
+					husb->hdev.name, _urb, _urb->type, urb);
 			usb_unlink_urb(urb);
-		kfree_skb(skb);
+			_urb_queue_tail(__completed_q(husb, _urb->type), _urb);
+		}
+
+		/* Release completed requests */
+		while ((_urb = _urb_dequeue(&husb->completed_q[i]))) {
+			urb = &_urb->urb;
+			BT_DBG("%s freeing _urb %p type %d urb %p",
+					husb->hdev.name, _urb, _urb->type, urb);
+			if (urb->setup_packet)
+				kfree(urb->setup_packet);
+			if (urb->transfer_buffer)
+				kfree(urb->transfer_buffer);
+			_urb_free(_urb);
 		}
 
-	while ((urb = hci_usb_get_completed(husb)))
-		usb_free_urb(urb);
+		/* Release reassembly buffers */
+		if (husb->reassembly[i]) {
+			kfree_skb(husb->reassembly[i]);
+			husb->reassembly[i] = NULL;
+		}
+	}
 }
 
 /* Close device */
@@ -263,7 +377,6 @@ static int hci_usb_close(struct hci_dev *hdev)
 
 	write_lock_irqsave(&husb->completion_lock, flags);
 	
-	hci_usb_disable_intr(husb);
 	hci_usb_unlink_urbs(husb);
 	hci_usb_flush(hdev);
 
@@ -271,79 +384,123 @@ static int hci_usb_close(struct hci_dev *hdev)
 	return 0;
 }
 
+static int __tx_submit(struct hci_usb *husb, struct _urb *_urb)
+{
+	struct urb *urb = &_urb->urb;
+	int err;
+
+	BT_DBG("%s urb %p type %d", husb->hdev.name, urb, _urb->type);
+	
+	_urb_queue_tail(__pending_q(husb, _urb->type), _urb);
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err) {
+		BT_ERR("%s tx submit failed urb %p type %d err %d",
+				husb->hdev.name, urb, _urb->type, err);
+		_urb_unlink(_urb);
+		_urb_queue_tail(__completed_q(husb, _urb->type), _urb);
+	} else
+		atomic_inc(__pending_tx(husb, _urb->type));
+
+	return err;
+}
+
 static inline int hci_usb_send_ctrl(struct hci_usb *husb, struct sk_buff *skb)
 {
-	struct hci_usb_scb *scb = (void *) skb->cb;
-	struct urb *urb = hci_usb_get_completed(husb);
-	struct usb_ctrlrequest *cr;
-	int pipe, err;
+	struct _urb *_urb = __get_completed(husb, skb->pkt_type);
+	struct usb_ctrlrequest *dr;
+	struct urb *urb;
 
-	if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
+	if (!_urb) {
+	       	_urb = _urb_alloc(0, GFP_ATOMIC);
+	       	if (!_urb)
 			return -ENOMEM;
+		_urb->type = skb->pkt_type;
 
-	if (!(cr = kmalloc(sizeof(*cr), GFP_ATOMIC))) {
-		usb_free_urb(urb);
+		dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
+		if (!dr) {
+			_urb_free(_urb);
 			return -ENOMEM;
 		}
+	} else
+		dr = (void *) _urb->urb.setup_packet;
 
-	pipe = usb_sndctrlpipe(husb->udev, 0);
+	dr->bRequestType = HCI_CTRL_REQ;
+	dr->bRequest = 0;
+	dr->wIndex   = 0;
+	dr->wValue   = 0;
+	dr->wLength  = __cpu_to_le16(skb->len);
 
-	cr->bRequestType = HCI_CTRL_REQ;
-	cr->bRequest = 0;
-	cr->wIndex   = 0;
-	cr->wValue   = 0;
-	cr->wLength  = __cpu_to_le16(skb->len);
+	urb = &_urb->urb;
+	usb_fill_control_urb(urb, husb->udev, usb_sndctrlpipe(husb->udev, 0),
+		(void *) dr, skb->data, skb->len, hci_usb_tx_complete, husb);
 
-	usb_fill_control_urb(urb, husb->udev, pipe, (void *) cr,
-			skb->data, skb->len, hci_usb_tx_complete, skb);
+	BT_DBG("%s skb %p len %d", husb->hdev.name, skb, skb->len);
 	
-	BT_DBG("%s urb %p len %d", husb->hdev.name, urb, skb->len);
+	_urb->priv = skb;
+	return __tx_submit(husb, _urb);
+}
 
-	scb->urb = urb;
+static inline int hci_usb_send_bulk(struct hci_usb *husb, struct sk_buff *skb)
+{
+	struct _urb *_urb = __get_completed(husb, skb->pkt_type);
+	struct urb *urb;
+	int pipe;
 
-	skb_queue_tail(&husb->pending_q, skb);
-	err = usb_submit_urb(urb, GFP_ATOMIC);
-	if (err) {
-		BT_ERR("%s ctrl tx submit failed urb %p err %d", 
-				husb->hdev.name, urb, err);
-		skb_unlink(skb);
-		usb_free_urb(urb); kfree(cr);
+	if (!_urb) {
+	       	_urb = _urb_alloc(0, GFP_ATOMIC);
+	       	if (!_urb)
+			return -ENOMEM;
+		_urb->type = skb->pkt_type;
 	}
-	return err;
+
+	urb  = &_urb->urb;
+	pipe = usb_sndbulkpipe(husb->udev, husb->bulk_out_ep->desc.bEndpointAddress);
+	usb_fill_bulk_urb(urb, husb->udev, pipe, skb->data, skb->len, 
+			hci_usb_tx_complete, husb);
+	urb->transfer_flags = USB_ZERO_PACKET;
+
+	BT_DBG("%s skb %p len %d", husb->hdev.name, skb, skb->len);
+
+	_urb->priv = skb;
+	return __tx_submit(husb, _urb);
 }
 
-static inline int hci_usb_send_bulk(struct hci_usb *husb, struct sk_buff *skb)
+#ifdef CONFIG_BT_USB_SCO
+static inline int hci_usb_send_isoc(struct hci_usb *husb, struct sk_buff *skb)
 {
-	struct hci_usb_scb *scb = (void *) skb->cb;
-	struct urb *urb = hci_usb_get_completed(husb);
-	int pipe, err;
+	struct _urb *_urb = __get_completed(husb, skb->pkt_type);
+	struct urb *urb;
 	
-	if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
+	if (!_urb) {
+	       	_urb = _urb_alloc(HCI_MAX_ISOC_FRAMES, GFP_ATOMIC);
+	       	if (!_urb)
 			return -ENOMEM;
+		_urb->type = skb->pkt_type;
+	}
 
-	pipe = usb_sndbulkpipe(husb->udev, husb->bulk_out_ep);
+	BT_DBG("%s skb %p len %d", husb->hdev.name, skb, skb->len);
 
-	usb_fill_bulk_urb(urb, husb->udev, pipe, skb->data, skb->len,
-	              hci_usb_tx_complete, skb);
-	urb->transfer_flags = URB_ZERO_PACKET;
+	urb = &_urb->urb;
 	
-	BT_DBG("%s urb %p len %d", husb->hdev.name, urb, skb->len);
+	urb->context  = husb;
+	urb->dev      = husb->udev;
+	urb->pipe     = usb_sndisocpipe(husb->udev, husb->isoc_out_ep->desc.bEndpointAddress);
+	urb->complete = hci_usb_tx_complete;
+	urb->transfer_flags = URB_ISO_ASAP;
 
-	scb->urb = urb;
+	urb->transfer_buffer = skb->data;
+	urb->transfer_buffer_length = skb->len;
 	
-	skb_queue_tail(&husb->pending_q, skb);
-	err = usb_submit_urb(urb, GFP_ATOMIC);
-	if (err) {
-		BT_ERR("%s bulk tx submit failed urb %p err %d", 
-				husb->hdev.name, urb, err);
-		skb_unlink(skb);
-		usb_free_urb(urb);
-	}
-	return err;
+	__fill_isoc_desc(urb, skb->len, husb->isoc_out_ep->desc.wMaxPacketSize);
+
+	_urb->priv = skb;
+	return __tx_submit(husb, _urb);
 }
+#endif
 
 static void hci_usb_tx_process(struct hci_usb *husb)
 {
+	struct sk_buff_head *q;
 	struct sk_buff *skb;
 
 	BT_DBG("%s", husb->hdev.name);
@@ -351,22 +508,31 @@ static void hci_usb_tx_process(struct hci_usb *husb)
 	do {
 		clear_bit(HCI_USB_TX_WAKEUP, &husb->state);
 
-		/* Process ACL queue */
-		while (skb_queue_len(&husb->pending_q) < HCI_MAX_PENDING &&
-				(skb = skb_dequeue(&husb->acl_q))) {
-			if (hci_usb_send_bulk(husb, skb) < 0) {
-				skb_queue_head(&husb->acl_q, skb);
-				break;
+		/* Process command queue */
+		q = __transmit_q(husb, HCI_COMMAND_PKT);
+		if (!atomic_read(__pending_tx(husb, HCI_COMMAND_PKT)) &&
+				(skb = skb_dequeue(q))) {
+			if (hci_usb_send_ctrl(husb, skb) < 0)
+				skb_queue_head(q, skb);
 		}
+
+#ifdef CONFIG_BT_USB_SCO
+		/* Process SCO queue */
+		q = __transmit_q(husb, HCI_SCODATA_PKT);
+		if (!atomic_read(__pending_tx(husb, HCI_SCODATA_PKT)) &&
+				(skb = skb_dequeue(q))) {
+			if (hci_usb_send_isoc(husb, skb) < 0)
+				skb_queue_head(q, skb);
 		}
+#endif
 		
-		/* Process command queue */
-		if (!test_bit(HCI_USB_CTRL_TX, &husb->state) &&
-			(skb = skb_dequeue(&husb->cmd_q)) != NULL) {
-			set_bit(HCI_USB_CTRL_TX, &husb->state);
-			if (hci_usb_send_ctrl(husb, skb) < 0) {
-				skb_queue_head(&husb->cmd_q, skb);
-				clear_bit(HCI_USB_CTRL_TX, &husb->state);
+		/* Process ACL queue */
+		q = __transmit_q(husb, HCI_ACLDATA_PKT);
+		while (atomic_read(__pending_tx(husb, HCI_ACLDATA_PKT)) < HCI_MAX_BULK_TX &&
+				(skb = skb_dequeue(q))) {
+			if (hci_usb_send_bulk(husb, skb) < 0) {
+				skb_queue_head(q, skb);
+				break;
 			}
 		}
 	} while(test_bit(HCI_USB_TX_WAKEUP, &husb->state));
@@ -383,7 +549,7 @@ static inline void hci_usb_tx_wakeup(struct hci_usb *husb)
 }
 
 /* Send frames from HCI layer */
-int hci_usb_send_frame(struct sk_buff *skb)
+static int hci_usb_send_frame(struct sk_buff *skb)
 {
 	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 	struct hci_usb *husb;
@@ -396,228 +562,206 @@ int hci_usb_send_frame(struct sk_buff *skb)
 	if (!test_bit(HCI_RUNNING, &hdev->flags))
 		return -EBUSY;
 
-	husb = (struct hci_usb *) hdev->driver_data;
-
 	BT_DBG("%s type %d len %d", hdev->name, skb->pkt_type, skb->len);
 
-	read_lock(&husb->completion_lock);
+	husb = (struct hci_usb *) hdev->driver_data;
 
 	switch (skb->pkt_type) {
 	case HCI_COMMAND_PKT:
-		skb_queue_tail(&husb->cmd_q, skb);
 		hdev->stat.cmd_tx++;
 		break;
 
 	case HCI_ACLDATA_PKT:
-		skb_queue_tail(&husb->acl_q, skb);
 		hdev->stat.acl_tx++;
 		break;
 
+#ifdef CONFIG_BT_USB_SCO
 	case HCI_SCODATA_PKT:
+		hdev->stat.sco_tx++;
+		break;
+#endif
+
 	default:
 		kfree_skb(skb);
-		break;
+		return 0;
 	}
+
+	read_lock(&husb->completion_lock);
+
+	skb_queue_tail(__transmit_q(husb, skb->pkt_type), skb);
 	hci_usb_tx_wakeup(husb);
 
 	read_unlock(&husb->completion_lock);
 	return 0;
 }
 
-static void hci_usb_interrupt(struct urb *urb, struct pt_regs *regs)
+static inline int __recv_frame(struct hci_usb *husb, int type, void *data, int count)
 {
-	struct hci_usb *husb = (void *) urb->context;
-	struct hci_usb_scb *scb;
-	struct sk_buff *skb;
-	struct hci_event_hdr *eh;
-	__u8 *data = urb->transfer_buffer;
-	int count = urb->actual_length;
-	int len = HCI_EVENT_HDR_SIZE;
-	int status;
-
-	BT_DBG("%s urb %p count %d", husb->hdev.name, urb, count);
-
-	if (!test_bit(HCI_RUNNING, &husb->hdev.flags))
-		return;
-
-	switch (urb->status) {
-	case 0:
-		/* success */
-		break;
-	case -ECONNRESET:
-	case -ENOENT:
-	case -ESHUTDOWN:
-		/* this urb is terminated, clean up */
-		BT_DBG("%s urb shutting down with status: %d",
-				husb->hdev.name, urb->status);
-		return;
-	default:
-		BT_ERR("%s nonzero urb status received: %d",
-				husb->hdev.name, urb->status);
-		goto exit;
-	}
-
-	if (!count) {
-		BT_DBG("%s intr status %d, count %d", 
-				husb->hdev.name, urb->status, count);
-		goto exit;
-	}
-
-	read_lock(&husb->completion_lock);
+	BT_DBG("%s type %d data %p count %d", husb->hdev.name, type, data, count);
 
 	husb->hdev.stat.byte_rx += count;
 
-	if (!(skb = husb->intr_skb)) {
+	while (count) {
+		struct sk_buff *skb = __reassembly(husb, type);
+		struct { int expect; } *scb;
+		int len = 0;
+	
+		if (!skb) {
 			/* Start of the frame */
-		if (count < HCI_EVENT_HDR_SIZE)
-			goto bad_len;
 
-		eh  = (struct hci_event_hdr *) data;
-		len = eh->plen + HCI_EVENT_HDR_SIZE;
+			switch (type) {
+			case HCI_EVENT_PKT:
+				if (count >= HCI_EVENT_HDR_SIZE) {
+					struct hci_event_hdr *h = data;
+					len = HCI_EVENT_HDR_SIZE + h->plen;
+				} else
+					return -EILSEQ;
+				break;
 
-		if (count > len)
-			goto bad_len;
+			case HCI_ACLDATA_PKT:
+				if (count >= HCI_ACL_HDR_SIZE) {
+					struct hci_acl_hdr *h = data;
+					len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen);
+				} else
+					return -EILSEQ;
+				break;
+#ifdef CONFIG_BT_USB_SCO
+			case HCI_SCODATA_PKT:
+				if (count >= HCI_SCO_HDR_SIZE) {
+					struct hci_sco_hdr *h = data;
+					len = HCI_SCO_HDR_SIZE + h->dlen;
+				} else 
+					return -EILSEQ;
+				break;
+#endif
+			}
+			BT_DBG("new packet len %d", len);
 				
 			skb = bt_skb_alloc(len, GFP_ATOMIC);
 			if (!skb) {
-			BT_ERR("%s no memory for event packet", husb->hdev.name);
-			goto done;
+				BT_ERR("%s no memory for the packet", husb->hdev.name);
+				return -ENOMEM;
 			}
-		scb = (void *) skb->cb;
-
 			skb->dev = (void *) &husb->hdev;
-		skb->pkt_type = HCI_EVENT_PKT;
+			skb->pkt_type = type;
 	
-		husb->intr_skb = skb;
-		scb->intr_len  = len;
+			__reassembly(husb, type) = skb;
+
+			scb = (void *) skb->cb;
+			scb->expect = len;
 		} else {
 			/* Continuation */
 			scb = (void *) skb->cb;
-		len = scb->intr_len;
-		if (count > len) {
-			husb->intr_skb = NULL;
-			kfree_skb(skb);
-			goto bad_len;
-		}
+			len = scb->expect;
 		}
 
-	memcpy(skb_put(skb, count), data, count);
-	scb->intr_len -= count;
+		len = min(len, count);
 		
-	if (!scb->intr_len) {
+		memcpy(skb_put(skb, len), data, len);
+
+		scb->expect -= len;
+		if (!scb->expect) {
 			/* Complete frame */
-		husb->intr_skb = NULL;
+			__reassembly(husb, type) = NULL;
 			hci_recv_frame(skb);
 		}
 
-done:
-	read_unlock(&husb->completion_lock);
-	goto exit;
-
-bad_len:
-	BT_ERR("%s bad frame len %d expected %d", husb->hdev.name, count, len);
-	husb->hdev.stat.err_rx++;
-	read_unlock(&husb->completion_lock);
-
-exit:
-	status = usb_submit_urb (urb, GFP_ATOMIC);
-	if (status)
-		BT_ERR ("%s usb_submit_urb failed with result %d",
-				husb->hdev.name, status);
+		count -= len; data += len;
+	}
+	return 0;
 }
 
-static void hci_usb_tx_complete(struct urb *urb, struct pt_regs *regs)
+static void hci_usb_rx_complete(struct urb *urb, struct pt_regs *regs)
 {
-	struct sk_buff *skb  = (struct sk_buff *) urb->context;
-	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
-	struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
-
-	BT_DBG("%s urb %p status %d flags %x", husb->hdev.name, urb,
-			urb->status, urb->transfer_flags);
+	struct _urb *_urb = container_of(urb, struct _urb, urb);
+	struct hci_usb *husb = (void *) urb->context;
+	struct hci_dev *hdev = &husb->hdev;
+	int    err, count = urb->actual_length;
 
-	if (urb->pipe == usb_sndctrlpipe(husb->udev, 0)) {
-		kfree(urb->setup_packet);
-		clear_bit(HCI_USB_CTRL_TX, &husb->state);
-	}
+	BT_DBG("%s urb %p type %d status %d count %d flags %x", hdev->name, urb,
+			_urb->type, urb->status, count, urb->transfer_flags);
 
 	if (!test_bit(HCI_RUNNING, &hdev->flags))
 		return;
 
 	read_lock(&husb->completion_lock);
 
-	if (!urb->status)
-		husb->hdev.stat.byte_tx += skb->len;
-	else
-		husb->hdev.stat.err_tx++;
+	if (urb->status || !count)
+		goto resubmit;
 
-	skb_unlink(skb);
-	skb_queue_tail(&husb->completed_q, skb);
-	hci_usb_tx_wakeup(husb);
+	if (_urb->type == HCI_SCODATA_PKT) {
+#ifdef CONFIG_BT_USB_SCO
+		int i;
+		for (i=0; i < urb->number_of_packets; i++) {
+			BT_DBG("desc %d status %d offset %d len %d", i,
+					urb->iso_frame_desc[i].status,
+					urb->iso_frame_desc[i].offset,
+					urb->iso_frame_desc[i].actual_length);
+	
+			if (!urb->iso_frame_desc[i].status)
+				__recv_frame(husb, _urb->type, 
+					urb->transfer_buffer + urb->iso_frame_desc[i].offset,
+					urb->iso_frame_desc[i].actual_length);
+		}
+#else
+		;
+#endif
+	} else {
+		err = __recv_frame(husb, _urb->type, urb->transfer_buffer, count);
+		if (err < 0) { 
+			BT_ERR("%s corrupted packet: type %d count %d",
+					husb->hdev.name, _urb->type, count);
+			hdev->stat.err_rx++;
+		}
+	}
+
+resubmit:
+	urb->dev = husb->udev;
+	err      = usb_submit_urb(urb, GFP_ATOMIC);
+	BT_DBG("%s urb %p type %d resubmit status %d", hdev->name, urb,
+			_urb->type, err);
 
 	read_unlock(&husb->completion_lock);
-	return;
 }
 
-static void hci_usb_rx_complete(struct urb *urb, struct pt_regs *regs)
+static void hci_usb_tx_complete(struct urb *urb, struct pt_regs *regs)
 {
-	struct sk_buff *skb  = (struct sk_buff *) urb->context;
-	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
-	struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
-	int status, count = urb->actual_length;
-	struct hci_acl_hdr *ah;
-	int dlen, size;
-
-	BT_DBG("%s urb %p status %d count %d flags %x", husb->hdev.name, urb,
-			urb->status, count, urb->transfer_flags);
+	struct _urb *_urb = container_of(urb, struct _urb, urb);
+	struct hci_usb *husb = (void *) urb->context;
+	struct hci_dev *hdev = &husb->hdev;
 
-	if (!test_bit(HCI_RUNNING, &hdev->flags))
-		return;
+	BT_DBG("%s urb %p status %d flags %x", hdev->name, urb,
+			urb->status, urb->transfer_flags);
 
-	read_lock(&husb->completion_lock);
+	atomic_dec(__pending_tx(husb, _urb->type));
 
-	if (urb->status || !count)
-		goto resubmit;
+	urb->transfer_buffer = NULL;
+	kfree_skb((struct sk_buff *) _urb->priv);
 
-	husb->hdev.stat.byte_rx += count;
-
-	ah   = (struct hci_acl_hdr *) skb->data;
-	dlen = __le16_to_cpu(ah->dlen);
-	size = HCI_ACL_HDR_SIZE + dlen;
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return;
 
-	/* Verify frame len and completeness */
-	if (count != size) {
-		BT_ERR("%s corrupted ACL packet: count %d, dlen %d",
-				husb->hdev.name, count, dlen);
-		bt_dump("hci_usb", skb->data, count);
-		husb->hdev.stat.err_rx++;
-		goto resubmit;
-	}
+	if (!urb->status)
+		hdev->stat.byte_tx += urb->transfer_buffer_length;
+	else
+		hdev->stat.err_tx++;
 
-	skb_unlink(skb);
-	skb_put(skb, count);
-	hci_recv_frame(skb);
+	read_lock(&husb->completion_lock);
 
-	hci_usb_rx_submit(husb, urb);
+	_urb_unlink(_urb);
+	_urb_queue_tail(__completed_q(husb, _urb->type), _urb);
 
-	read_unlock(&husb->completion_lock);
-	return;
+	hci_usb_tx_wakeup(husb);
 	
-resubmit:
-	urb->dev = husb->udev;
-	status   = usb_submit_urb(urb, GFP_ATOMIC);
-	BT_DBG("%s URB resubmit status %d", husb->hdev.name, status);
 	read_unlock(&husb->completion_lock);
 }
 
 static void hci_usb_destruct(struct hci_dev *hdev)
 {
-	struct hci_usb *husb;
-
-	if (!hdev) return;
+	struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
 
 	BT_DBG("%s", hdev->name);
 
-	husb = (struct hci_usb *) hdev->driver_data;
 	kfree(husb);
 }
 
@@ -629,14 +773,16 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	struct usb_host_endpoint *bulk_in_ep[HCI_MAX_IFACE_NUM];
 	struct usb_host_endpoint *isoc_in_ep[HCI_MAX_IFACE_NUM];
 	struct usb_host_endpoint *intr_in_ep[HCI_MAX_IFACE_NUM];
-	struct usb_host_interface *uif;
 	struct usb_host_endpoint  *ep;
+	struct usb_host_interface *uif;
 	struct usb_interface *iface, *isoc_iface;
 	struct hci_usb *husb;
 	struct hci_dev *hdev;
 	int i, a, e, size, ifn, isoc_ifnum, isoc_alts;
 
-	BT_DBG("intf %p", intf);
+	BT_DBG("udev %p ifnum %d", udev, ifnum);
+
+	iface = &udev->actconfig->interface[0];
 
 	/* Check our black list */
 	if (usb_match_id(intf, ignore_ids))
@@ -679,6 +825,7 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 						bulk_out_ep[i] = ep;
 					break;
 
+#ifdef CONFIG_BT_USB_SCO
 				case USB_ENDPOINT_XFER_ISOC:
 					if (ep->desc.wMaxPacketSize < size)
 						break;
@@ -693,6 +840,7 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 					else
 						isoc_out_ep[i] = ep;
 					break;
+#endif
 				}
 			}
 		}
@@ -703,10 +851,12 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 		goto done;
 	}
 
+#ifdef CONFIG_BT_USB_SCO
 	if (!isoc_in_ep[1] || !isoc_out_ep[1]) {
 		BT_DBG("Isoc endpoints not found");
 		isoc_iface = NULL;
 	}
+#endif
 
 	if (!(husb = kmalloc(sizeof(struct hci_usb), GFP_KERNEL))) {
 		BT_ERR("Can't allocate: control structure");
@@ -716,30 +866,31 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	memset(husb, 0, sizeof(struct hci_usb));
 
 	husb->udev = udev;
-	husb->bulk_out_ep = bulk_out_ep[0]->desc.bEndpointAddress;
-	husb->bulk_in_ep  = bulk_in_ep[0]->desc.bEndpointAddress;
-
-	husb->intr_ep = intr_in_ep[0]->desc.bEndpointAddress;
-	husb->intr_interval = intr_in_ep[0]->desc.bInterval;
+	husb->bulk_out_ep = bulk_out_ep[0];
+	husb->bulk_in_ep  = bulk_in_ep[0];
+	husb->intr_in_ep  = intr_in_ep[0];
 
+#ifdef CONFIG_BT_USB_SCO
 	if (isoc_iface) {
+		BT_DBG("isoc ifnum %d alts %d", isoc_ifnum, isoc_alts);
 		if (usb_set_interface(udev, isoc_ifnum, isoc_alts)) {
 			BT_ERR("Can't set isoc interface settings");
 			isoc_iface = NULL;
 		}
 		usb_driver_claim_interface(&hci_usb_driver, isoc_iface, husb);
 		husb->isoc_iface  = isoc_iface;
-
-		husb->isoc_in_ep  = isoc_in_ep[1]->desc.bEndpointAddress;
-		husb->isoc_out_ep = isoc_in_ep[1]->desc.bEndpointAddress;
+		husb->isoc_in_ep  = isoc_in_ep[isoc_ifnum];
+		husb->isoc_out_ep = isoc_out_ep[isoc_ifnum];
 	}
+#endif
 	
 	husb->completion_lock = RW_LOCK_UNLOCKED;
 
-	skb_queue_head_init(&husb->acl_q);
-	skb_queue_head_init(&husb->cmd_q);
-	skb_queue_head_init(&husb->pending_q);
-	skb_queue_head_init(&husb->completed_q);
+	for (i = 0; i < 4; i++) {	
+		skb_queue_head_init(&husb->transmit_q[i]);
+		_urb_queue_init(&husb->pending_q[i]);
+		_urb_queue_init(&husb->completed_q[i]);
+	}
 
 	/* Initialize and register HCI device */
 	hdev = &husb->hdev;
@@ -753,8 +904,6 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	hdev->send  = hci_usb_send_frame;
 	hdev->destruct = hci_usb_destruct;
 
-	hdev->owner = THIS_MODULE;
-	
 	if (hci_register_dev(hdev) < 0) {
 		BT_ERR("Can't register HCI device");
 		goto probe_error;
@@ -773,13 +922,12 @@ int hci_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 static void hci_usb_disconnect(struct usb_interface *intf)
 {
 	struct hci_usb *husb = usb_get_intfdata(intf);
-	struct hci_dev *hdev;
+	struct hci_dev *hdev = &husb->hdev;
 
 	if (!husb)
 		return;
 	usb_set_intfdata(intf, NULL);
 
-	hdev = &husb->hdev;
 	BT_DBG("%s", hdev->name);
 
 	hci_usb_close(hdev);
@@ -792,17 +940,20 @@ static void hci_usb_disconnect(struct usb_interface *intf)
 }
 
 static struct usb_driver hci_usb_driver = {
+	.owner      =  THIS_MODULE,
 	.name       =  "hci_usb",
 	.probe      =  hci_usb_probe,
 	.disconnect =  hci_usb_disconnect,
-	.id_table   = bluetooth_ids
+	.id_table   =  bluetooth_ids,
 };
 
 int hci_usb_init(void)
 {
 	int err;
 
-	BT_INFO("HCI USB driver ver %s", VERSION);
+	BT_INFO("BlueZ HCI USB driver ver %s Copyright (C) 2000,2001 Qualcomm Inc",  
+		VERSION);
+	BT_INFO("Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>");
 
 	if ((err = usb_register(&hci_usb_driver)) < 0)
 		BT_ERR("Failed to register HCI USB driver");
@@ -819,5 +970,5 @@ module_init(hci_usb_init);
 module_exit(hci_usb_cleanup);
 
 MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>");
-MODULE_DESCRIPTION("Bluetooth HCI USB driver ver " VERSION);
+MODULE_DESCRIPTION("BlueZ HCI USB driver ver " VERSION);
 MODULE_LICENSE("GPL");

drivers/bluetooth/hci_usb.h

 /* 
-   BlueZ - Bluetooth protocol stack for Linux
+   HCI USB driver for Linux Bluetooth protocol stack (BlueZ)
    Copyright (C) 2000-2001 Qualcomm Incorporated
-
    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
 
+   Copyright (C) 2003 Maxim Krasnyansky <maxk@qualcomm.com>
+
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2 as
    published by the Free Software Foundation;
@@ -40,40 +41,96 @@
 #define HCI_MAX_BULK_TX     	4
 #define HCI_MAX_BULK_RX     	1
 
+#define HCI_MAX_ISOC_FRAMES     10
+
+struct _urb_queue {
+	struct list_head head;
+	spinlock_t       lock;
+};
+
+struct _urb {
+	struct list_head  list;
+	struct _urb_queue *queue;
+	int               type;
+	void              *priv;
+	struct urb        urb;
+};
+
+struct _urb *_urb_alloc(int isoc, int gfp);
+
+static inline void _urb_free(struct _urb *_urb)
+{
+	kfree(_urb);
+}
+
+static inline void _urb_queue_init(struct _urb_queue *q)
+{
+	INIT_LIST_HEAD(&q->head);
+	spin_lock_init(&q->lock);
+}
+
+static inline void _urb_queue_head(struct _urb_queue *q, struct _urb *_urb)
+{
+        unsigned long flags;
+        spin_lock_irqsave(&q->lock, flags);
+	list_add(&_urb->list, &q->head); _urb->queue = q;
+	spin_unlock_irqrestore(&q->lock, flags);
+}
+
+static inline void _urb_queue_tail(struct _urb_queue *q, struct _urb *_urb)
+{
+        unsigned long flags;
+        spin_lock_irqsave(&q->lock, flags);
+	list_add_tail(&_urb->list, &q->head); _urb->queue = q;
+	spin_unlock_irqrestore(&q->lock, flags);
+}
+
+static inline void _urb_unlink(struct _urb *_urb)
+{
+	struct _urb_queue *q = _urb->queue;
+        unsigned long flags;
+	if (q) {
+        	spin_lock_irqsave(&q->lock, flags);
+		list_del(&_urb->list); _urb->queue = NULL;
+		spin_unlock_irqrestore(&q->lock, flags);
+	}
+}
+
+struct _urb *_urb_dequeue(struct _urb_queue *q);
+
+#ifndef container_of
+#define container_of(ptr, type, member) ({                      \
+		        const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
+			        (type *)( (char *)__mptr - offsetof(type,member) );})
+#endif
+
 struct hci_usb {
 	struct hci_dev		hdev;
 
 	unsigned long		state;
 	
 	struct usb_device 	*udev;
-	struct usb_interface    *isoc_iface;
 	
-	__u8			bulk_out_ep;
-	__u8			bulk_in_ep;
-	__u8			isoc_out_ep;
-	__u8			isoc_in_ep;
+	struct usb_host_endpoint	*bulk_in_ep;
+	struct usb_host_endpoint	*bulk_out_ep;
+	struct usb_host_endpoint	*intr_in_ep;
+
+	struct usb_interface            *isoc_iface;
+	struct usb_host_endpoint	*isoc_out_ep;
+	struct usb_host_endpoint	*isoc_in_ep;
 
-	__u8			intr_ep;
-	__u8			intr_interval;
-	struct urb		*intr_urb;
-	struct sk_buff		*intr_skb;
+	struct sk_buff_head	transmit_q[4];
+	struct sk_buff		*reassembly[4]; // Reassembly buffers
 
 	rwlock_t		completion_lock;
 
-	struct sk_buff_head	cmd_q;	     // TX Commands
-	struct sk_buff_head	acl_q;	     // TX ACLs
-	struct sk_buff_head	pending_q;   // Pending requests
-	struct sk_buff_head	completed_q; // Completed requests
-};
-
-struct hci_usb_scb {
-	struct urb *urb;
-	int    intr_len;
+	atomic_t		pending_tx[4];  // Number of pending requests 
+	struct _urb_queue	pending_q[4];   // Pending requests
+	struct _urb_queue	completed_q[4]; // Completed requests
 };
 
 /* States  */
 #define HCI_USB_TX_PROCESS	1
 #define HCI_USB_TX_WAKEUP	2
-#define HCI_USB_CTRL_TX		3
 
 #endif /* __KERNEL__ */