/*
   *
   *  Generic Bluetooth USB driver
   *

   *  Copyright (C) 2005-2008  Marcel Holtmann <marcel@holtmann.org>

   *
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this program; if not, write to the Free Software
   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   *
   */

  #include <linux/module.h>

  #include <linux/usb.h>

  #include <linux/firmware.h>

  
  #include <net/bluetooth/bluetooth.h>
  #include <net/bluetooth/hci_core.h>

  #define VERSION "0.6"

  static bool ignore_dga;
  static bool ignore_csr;
  static bool ignore_sniffer;
  static bool disable_scofix;
  static bool force_scofix;

  static bool reset = 1;

  
  static struct usb_driver btusb_driver;
  
  #define BTUSB_IGNORE		0x01

  #define BTUSB_DIGIANSWER	0x02
  #define BTUSB_CSR		0x04
  #define BTUSB_SNIFFER		0x08
  #define BTUSB_BCM92035		0x10
  #define BTUSB_BROKEN_ISOC	0x20
  #define BTUSB_WRONG_SCO_MTU	0x40

  #define BTUSB_ATH3012		0x80

  #define BTUSB_INTEL		0x100

  static const struct usb_device_id btusb_table[] = {

  	/* Generic Bluetooth USB device */
  	{ USB_DEVICE_INFO(0xe0, 0x01, 0x01) },

  	/* Apple-specific (Broadcom) devices */
  	{ USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01) },

  	/* MediaTek MT76x0E */
  	{ USB_DEVICE(0x0e8d, 0x763f) },

  	/* Broadcom SoftSailing reporting vendor specific */

  	{ USB_DEVICE(0x0a5c, 0x21e1) },

  	/* Apple MacBookPro 7,1 */
  	{ USB_DEVICE(0x05ac, 0x8213) },

  	/* Apple iMac11,1 */
  	{ USB_DEVICE(0x05ac, 0x8215) },

  	/* Apple MacBookPro6,2 */
  	{ USB_DEVICE(0x05ac, 0x8218) },

  	/* Apple MacBookAir3,1, MacBookAir3,2 */
  	{ USB_DEVICE(0x05ac, 0x821b) },

  	/* Apple MacBookAir4,1 */
  	{ USB_DEVICE(0x05ac, 0x821f) },

  	/* Apple MacBookPro8,2 */
  	{ USB_DEVICE(0x05ac, 0x821a) },

  	/* Apple MacMini5,1 */
  	{ USB_DEVICE(0x05ac, 0x8281) },

  	/* AVM BlueFRITZ! USB v2.0 */
  	{ USB_DEVICE(0x057c, 0x3800) },
  
  	/* Bluetooth Ultraport Module from IBM */
  	{ USB_DEVICE(0x04bf, 0x030a) },
  
  	/* ALPS Modules with non-standard id */
  	{ USB_DEVICE(0x044e, 0x3001) },
  	{ USB_DEVICE(0x044e, 0x3002) },
  
  	/* Ericsson with non-standard id */
  	{ USB_DEVICE(0x0bdb, 0x1002) },
  
  	/* Canyon CN-BTU1 with HID interfaces */

  	{ USB_DEVICE(0x0c10, 0x0000) },

  	/* Broadcom BCM20702A0 */

  	{ USB_DEVICE(0x0489, 0xe042) },
  	{ USB_DEVICE(0x04ca, 0x2003) },

  	{ USB_DEVICE(0x0b05, 0x17b5) },

  	{ USB_DEVICE(0x0b05, 0x17cb) },

  	{ USB_DEVICE(0x413c, 0x8197) },

  	/* Foxconn - Hon Hai */

  	{ USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01) },

  	/* Broadcom devices with vendor specific id */

  	{ USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01) },

  	/* Belkin F8065bf - Broadcom based */
  	{ USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01) },

  	/* IMC Networks - Broadcom based */
  	{ USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01) },

  	{ }	/* Terminating entry */
  };
  
  MODULE_DEVICE_TABLE(usb, btusb_table);

  static const struct usb_device_id blacklist_table[] = {

  	/* CSR BlueCore devices */
  	{ USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
  
  	/* Broadcom BCM2033 without firmware */
  	{ USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },

  	/* Atheros 3011 with sflash firmware */

  	{ USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
  	{ USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
  	{ USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },

  	{ USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },

  	{ USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },

  	{ USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },

  	/* Atheros AR9285 Malbec with sflash firmware */
  	{ USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },

  	/* Atheros 3012 with sflash firmware */

  	{ USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0x3005), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },

  	/* Atheros AR5BBU12 with sflash firmware */
  	{ USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },

  	/* Atheros AR5BBU12 with sflash firmware */

  	{ USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },

  	/* Broadcom BCM2035 */

  	{ USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },

  	{ USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
  	{ USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },

  
  	/* Broadcom BCM2045 */

  	{ USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
  	{ USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },

  	/* IBM/Lenovo ThinkPad with Broadcom chip */

  	{ USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
  	{ USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },

  
  	/* HP laptop with Broadcom chip */

  	{ USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },

  
  	/* Dell laptop with Broadcom chip */

  	{ USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },

  	/* Dell Wireless 370 and 410 devices */

  	{ USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },

  	{ USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },

  	/* Belkin F8T012 and F8T013 devices */
  	{ USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
  	{ USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },

  	/* Asus WL-BTD202 device */
  	{ USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
  
  	/* Kensington Bluetooth USB adapter */
  	{ USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },

  	/* RTX Telecom based adapters with buggy SCO support */
  	{ USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
  	{ USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
  
  	/* CONWISE Technology based adapters with buggy SCO support */
  	{ USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },

  	/* Digianswer devices */
  	{ USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
  	{ USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
  
  	/* CSR BlueCore Bluetooth Sniffer */
  	{ USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
  
  	/* Frontline ComProbe Bluetooth Sniffer */
  	{ USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },

  	/* Intel Bluetooth device */
  	{ USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },

  	{ USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },

  	{ }	/* Terminating entry */
  };

  #define BTUSB_MAX_ISOC_FRAMES	10

  #define BTUSB_INTR_RUNNING	0
  #define BTUSB_BULK_RUNNING	1

  #define BTUSB_ISOC_RUNNING	2

  #define BTUSB_SUSPENDING	3

  #define BTUSB_DID_ISO_RESUME	4

  
  struct btusb_data {
  	struct hci_dev       *hdev;
  	struct usb_device    *udev;

  	struct usb_interface *intf;

  	struct usb_interface *isoc;

  
  	spinlock_t lock;
  
  	unsigned long flags;
  
  	struct work_struct work;

  	struct work_struct waker;

  
  	struct usb_anchor tx_anchor;
  	struct usb_anchor intr_anchor;
  	struct usb_anchor bulk_anchor;

  	struct usb_anchor isoc_anchor;

  	struct usb_anchor deferred;
  	int tx_in_flight;
  	spinlock_t txlock;

  
  	struct usb_endpoint_descriptor *intr_ep;
  	struct usb_endpoint_descriptor *bulk_tx_ep;
  	struct usb_endpoint_descriptor *bulk_rx_ep;

  	struct usb_endpoint_descriptor *isoc_tx_ep;
  	struct usb_endpoint_descriptor *isoc_rx_ep;

  	__u8 cmdreq_type;

  	unsigned int sco_num;

  	int isoc_altsetting;

  	int suspend_count;

  };

  static int inc_tx(struct btusb_data *data)
  {
  	unsigned long flags;
  	int rv;
  
  	spin_lock_irqsave(&data->txlock, flags);
  	rv = test_bit(BTUSB_SUSPENDING, &data->flags);
  	if (!rv)
  		data->tx_in_flight++;
  	spin_unlock_irqrestore(&data->txlock, flags);
  
  	return rv;
  }

  static void btusb_intr_complete(struct urb *urb)
  {
  	struct hci_dev *hdev = urb->context;

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	int err;
  
  	BT_DBG("%s urb %p status %d count %d", hdev->name,
  					urb, urb->status, urb->actual_length);
  
  	if (!test_bit(HCI_RUNNING, &hdev->flags))
  		return;
  
  	if (urb->status == 0) {

  		hdev->stat.byte_rx += urb->actual_length;

  		if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
  						urb->transfer_buffer,
  						urb->actual_length) < 0) {
  			BT_ERR("%s corrupted event packet", hdev->name);
  			hdev->stat.err_rx++;
  		}
  	}
  
  	if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
  		return;

  	usb_mark_last_busy(data->udev);

  	usb_anchor_urb(urb, &data->intr_anchor);
  
  	err = usb_submit_urb(urb, GFP_ATOMIC);
  	if (err < 0) {

  		/* -EPERM: urb is being killed;
  		 * -ENODEV: device got disconnected */
  		if (err != -EPERM && err != -ENODEV)

  			BT_ERR("%s urb %p failed to resubmit (%d)",

  						hdev->name, urb, -err);
  		usb_unanchor_urb(urb);
  	}
  }

  static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)

  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	struct urb *urb;
  	unsigned char *buf;
  	unsigned int pipe;
  	int err, size;
  
  	BT_DBG("%s", hdev->name);

  	if (!data->intr_ep)
  		return -ENODEV;

  	urb = usb_alloc_urb(0, mem_flags);

  	if (!urb)
  		return -ENOMEM;
  
  	size = le16_to_cpu(data->intr_ep->wMaxPacketSize);

  	buf = kmalloc(size, mem_flags);

  	if (!buf) {
  		usb_free_urb(urb);
  		return -ENOMEM;
  	}
  
  	pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
  
  	usb_fill_int_urb(urb, data->udev, pipe, buf, size,
  						btusb_intr_complete, hdev,
  						data->intr_ep->bInterval);
  
  	urb->transfer_flags |= URB_FREE_BUFFER;
  
  	usb_anchor_urb(urb, &data->intr_anchor);

  	err = usb_submit_urb(urb, mem_flags);

  	if (err < 0) {

  		if (err != -EPERM && err != -ENODEV)
  			BT_ERR("%s urb %p submission failed (%d)",

  						hdev->name, urb, -err);
  		usb_unanchor_urb(urb);

  	}
  
  	usb_free_urb(urb);
  
  	return err;
  }
  
  static void btusb_bulk_complete(struct urb *urb)
  {
  	struct hci_dev *hdev = urb->context;

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	int err;
  
  	BT_DBG("%s urb %p status %d count %d", hdev->name,
  					urb, urb->status, urb->actual_length);
  
  	if (!test_bit(HCI_RUNNING, &hdev->flags))
  		return;
  
  	if (urb->status == 0) {

  		hdev->stat.byte_rx += urb->actual_length;

  		if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
  						urb->transfer_buffer,
  						urb->actual_length) < 0) {
  			BT_ERR("%s corrupted ACL packet", hdev->name);
  			hdev->stat.err_rx++;
  		}
  	}
  
  	if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
  		return;
  
  	usb_anchor_urb(urb, &data->bulk_anchor);

  	usb_mark_last_busy(data->udev);

  
  	err = usb_submit_urb(urb, GFP_ATOMIC);
  	if (err < 0) {

  		/* -EPERM: urb is being killed;
  		 * -ENODEV: device got disconnected */
  		if (err != -EPERM && err != -ENODEV)

  			BT_ERR("%s urb %p failed to resubmit (%d)",

  						hdev->name, urb, -err);
  		usb_unanchor_urb(urb);
  	}
  }

  static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)

  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	struct urb *urb;
  	unsigned char *buf;
  	unsigned int pipe;

  	int err, size = HCI_MAX_FRAME_SIZE;

  
  	BT_DBG("%s", hdev->name);

  	if (!data->bulk_rx_ep)
  		return -ENODEV;

  	urb = usb_alloc_urb(0, mem_flags);

  	if (!urb)
  		return -ENOMEM;

  	buf = kmalloc(size, mem_flags);

  	if (!buf) {
  		usb_free_urb(urb);
  		return -ENOMEM;
  	}
  
  	pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
  
  	usb_fill_bulk_urb(urb, data->udev, pipe,
  					buf, size, btusb_bulk_complete, hdev);
  
  	urb->transfer_flags |= URB_FREE_BUFFER;

  	usb_mark_last_busy(data->udev);

  	usb_anchor_urb(urb, &data->bulk_anchor);

  	err = usb_submit_urb(urb, mem_flags);

  	if (err < 0) {

  		if (err != -EPERM && err != -ENODEV)
  			BT_ERR("%s urb %p submission failed (%d)",

  						hdev->name, urb, -err);
  		usb_unanchor_urb(urb);

  	}
  
  	usb_free_urb(urb);
  
  	return err;
  }

  static void btusb_isoc_complete(struct urb *urb)
  {
  	struct hci_dev *hdev = urb->context;

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	int i, err;
  
  	BT_DBG("%s urb %p status %d count %d", hdev->name,
  					urb, urb->status, urb->actual_length);
  
  	if (!test_bit(HCI_RUNNING, &hdev->flags))
  		return;
  
  	if (urb->status == 0) {
  		for (i = 0; i < urb->number_of_packets; i++) {
  			unsigned int offset = urb->iso_frame_desc[i].offset;
  			unsigned int length = urb->iso_frame_desc[i].actual_length;
  
  			if (urb->iso_frame_desc[i].status)
  				continue;
  
  			hdev->stat.byte_rx += length;
  
  			if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
  						urb->transfer_buffer + offset,
  								length) < 0) {
  				BT_ERR("%s corrupted SCO packet", hdev->name);
  				hdev->stat.err_rx++;
  			}
  		}
  	}
  
  	if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
  		return;
  
  	usb_anchor_urb(urb, &data->isoc_anchor);
  
  	err = usb_submit_urb(urb, GFP_ATOMIC);
  	if (err < 0) {

  		/* -EPERM: urb is being killed;
  		 * -ENODEV: device got disconnected */
  		if (err != -EPERM && err != -ENODEV)

  			BT_ERR("%s urb %p failed to resubmit (%d)",

  						hdev->name, urb, -err);
  		usb_unanchor_urb(urb);
  	}
  }

  static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)

  {
  	int i, offset = 0;
  
  	BT_DBG("len %d mtu %d", len, mtu);
  
  	for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
  					i++, offset += mtu, len -= mtu) {
  		urb->iso_frame_desc[i].offset = offset;
  		urb->iso_frame_desc[i].length = mtu;
  	}
  
  	if (len && i < BTUSB_MAX_ISOC_FRAMES) {
  		urb->iso_frame_desc[i].offset = offset;
  		urb->iso_frame_desc[i].length = len;
  		i++;
  	}
  
  	urb->number_of_packets = i;
  }

  static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)

  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	struct urb *urb;
  	unsigned char *buf;
  	unsigned int pipe;
  	int err, size;
  
  	BT_DBG("%s", hdev->name);
  
  	if (!data->isoc_rx_ep)
  		return -ENODEV;

  	urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);

  	if (!urb)
  		return -ENOMEM;
  
  	size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
  						BTUSB_MAX_ISOC_FRAMES;

  	buf = kmalloc(size, mem_flags);

  	if (!buf) {
  		usb_free_urb(urb);
  		return -ENOMEM;
  	}
  
  	pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);

  	usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
  				hdev, data->isoc_rx_ep->bInterval);

  
  	urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;

  
  	__fill_isoc_descriptor(urb, size,
  			le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
  
  	usb_anchor_urb(urb, &data->isoc_anchor);

  	err = usb_submit_urb(urb, mem_flags);

  	if (err < 0) {

  		if (err != -EPERM && err != -ENODEV)
  			BT_ERR("%s urb %p submission failed (%d)",

  						hdev->name, urb, -err);
  		usb_unanchor_urb(urb);

  	}
  
  	usb_free_urb(urb);
  
  	return err;
  }

  static void btusb_tx_complete(struct urb *urb)
  {
  	struct sk_buff *skb = urb->context;
  	struct hci_dev *hdev = (struct hci_dev *) skb->dev;

  	struct btusb_data *data = hci_get_drvdata(hdev);

  
  	BT_DBG("%s urb %p status %d count %d", hdev->name,
  					urb, urb->status, urb->actual_length);
  
  	if (!test_bit(HCI_RUNNING, &hdev->flags))
  		goto done;
  
  	if (!urb->status)
  		hdev->stat.byte_tx += urb->transfer_buffer_length;
  	else
  		hdev->stat.err_tx++;
  
  done:
  	spin_lock(&data->txlock);
  	data->tx_in_flight--;
  	spin_unlock(&data->txlock);
  
  	kfree(urb->setup_packet);
  
  	kfree_skb(skb);
  }
  
  static void btusb_isoc_tx_complete(struct urb *urb)
  {
  	struct sk_buff *skb = urb->context;
  	struct hci_dev *hdev = (struct hci_dev *) skb->dev;

  
  	BT_DBG("%s urb %p status %d count %d", hdev->name,
  					urb, urb->status, urb->actual_length);
  
  	if (!test_bit(HCI_RUNNING, &hdev->flags))
  		goto done;
  
  	if (!urb->status)
  		hdev->stat.byte_tx += urb->transfer_buffer_length;
  	else
  		hdev->stat.err_tx++;
  
  done:
  	kfree(urb->setup_packet);
  
  	kfree_skb(skb);
  }
  
  static int btusb_open(struct hci_dev *hdev)
  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	int err;
  
  	BT_DBG("%s", hdev->name);

  	err = usb_autopm_get_interface(data->intf);
  	if (err < 0)
  		return err;
  
  	data->intf->needs_remote_wakeup = 1;

  	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))

  		goto done;

  
  	if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))

  		goto done;

  	err = btusb_submit_intr_urb(hdev, GFP_KERNEL);

  	if (err < 0)
  		goto failed;
  
  	err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);

  	if (err < 0) {

  		usb_kill_anchored_urbs(&data->intr_anchor);
  		goto failed;

  	}

  	set_bit(BTUSB_BULK_RUNNING, &data->flags);
  	btusb_submit_bulk_urb(hdev, GFP_KERNEL);

  done:
  	usb_autopm_put_interface(data->intf);

  	return 0;
  
  failed:
  	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
  	clear_bit(HCI_RUNNING, &hdev->flags);

  	usb_autopm_put_interface(data->intf);

  	return err;
  }

  static void btusb_stop_traffic(struct btusb_data *data)
  {
  	usb_kill_anchored_urbs(&data->intr_anchor);
  	usb_kill_anchored_urbs(&data->bulk_anchor);
  	usb_kill_anchored_urbs(&data->isoc_anchor);
  }

  static int btusb_close(struct hci_dev *hdev)
  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	int err;

  
  	BT_DBG("%s", hdev->name);
  
  	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
  		return 0;

  	cancel_work_sync(&data->work);

  	cancel_work_sync(&data->waker);

  	clear_bit(BTUSB_ISOC_RUNNING, &data->flags);

  	clear_bit(BTUSB_BULK_RUNNING, &data->flags);

  	clear_bit(BTUSB_INTR_RUNNING, &data->flags);

  
  	btusb_stop_traffic(data);
  	err = usb_autopm_get_interface(data->intf);
  	if (err < 0)

  		goto failed;

  
  	data->intf->needs_remote_wakeup = 0;
  	usb_autopm_put_interface(data->intf);

  failed:
  	usb_scuttle_anchored_urbs(&data->deferred);

  	return 0;
  }
  
  static int btusb_flush(struct hci_dev *hdev)
  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  
  	BT_DBG("%s", hdev->name);
  
  	usb_kill_anchored_urbs(&data->tx_anchor);
  
  	return 0;
  }

  static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)

  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	struct usb_ctrlrequest *dr;
  	struct urb *urb;
  	unsigned int pipe;
  	int err;
  
  	BT_DBG("%s", hdev->name);
  
  	if (!test_bit(HCI_RUNNING, &hdev->flags))
  		return -EBUSY;

  	skb->dev = (void *) hdev;

  	switch (bt_cb(skb)->pkt_type) {
  	case HCI_COMMAND_PKT:
  		urb = usb_alloc_urb(0, GFP_ATOMIC);
  		if (!urb)
  			return -ENOMEM;
  
  		dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
  		if (!dr) {
  			usb_free_urb(urb);
  			return -ENOMEM;
  		}

  		dr->bRequestType = data->cmdreq_type;

  		dr->bRequest     = 0;
  		dr->wIndex       = 0;
  		dr->wValue       = 0;
  		dr->wLength      = __cpu_to_le16(skb->len);
  
  		pipe = usb_sndctrlpipe(data->udev, 0x00);
  
  		usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
  				skb->data, skb->len, btusb_tx_complete, skb);
  
  		hdev->stat.cmd_tx++;
  		break;
  
  	case HCI_ACLDATA_PKT:

  		if (!data->bulk_tx_ep)

  			return -ENODEV;

  		urb = usb_alloc_urb(0, GFP_ATOMIC);
  		if (!urb)
  			return -ENOMEM;
  
  		pipe = usb_sndbulkpipe(data->udev,
  					data->bulk_tx_ep->bEndpointAddress);
  
  		usb_fill_bulk_urb(urb, data->udev, pipe,
  				skb->data, skb->len, btusb_tx_complete, skb);
  
  		hdev->stat.acl_tx++;
  		break;
  
  	case HCI_SCODATA_PKT:

  		if (!data->isoc_tx_ep || hci_conn_num(hdev, SCO_LINK) < 1)

  			return -ENODEV;
  
  		urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
  		if (!urb)
  			return -ENOMEM;
  
  		pipe = usb_sndisocpipe(data->udev,
  					data->isoc_tx_ep->bEndpointAddress);

  		usb_fill_int_urb(urb, data->udev, pipe,
  				skb->data, skb->len, btusb_isoc_tx_complete,
  				skb, data->isoc_tx_ep->bInterval);

  
  		urb->transfer_flags  = URB_ISO_ASAP;

  
  		__fill_isoc_descriptor(urb, skb->len,
  				le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));

  		hdev->stat.sco_tx++;

  		goto skip_waking;

  
  	default:
  		return -EILSEQ;
  	}

  	err = inc_tx(data);
  	if (err) {
  		usb_anchor_urb(urb, &data->deferred);
  		schedule_work(&data->waker);
  		err = 0;
  		goto done;
  	}
  
  skip_waking:

  	usb_anchor_urb(urb, &data->tx_anchor);
  
  	err = usb_submit_urb(urb, GFP_ATOMIC);
  	if (err < 0) {

  		if (err != -EPERM && err != -ENODEV)
  			BT_ERR("%s urb %p submission failed (%d)",
  						hdev->name, urb, -err);

  		kfree(urb->setup_packet);
  		usb_unanchor_urb(urb);

  	} else {
  		usb_mark_last_busy(data->udev);

  	}

  done:

  	usb_free_urb(urb);

  	return err;
  }

  static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  
  	BT_DBG("%s evt %d", hdev->name, evt);

  	if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
  		data->sco_num = hci_conn_num(hdev, SCO_LINK);

  		schedule_work(&data->work);

  	}

  }

  static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)

  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	struct usb_interface *intf = data->isoc;
  	struct usb_endpoint_descriptor *ep_desc;
  	int i, err;
  
  	if (!data->isoc)
  		return -ENODEV;
  
  	err = usb_set_interface(data->udev, 1, altsetting);
  	if (err < 0) {
  		BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
  		return err;
  	}
  
  	data->isoc_altsetting = altsetting;
  
  	data->isoc_tx_ep = NULL;
  	data->isoc_rx_ep = NULL;
  
  	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
  		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
  
  		if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
  			data->isoc_tx_ep = ep_desc;
  			continue;
  		}
  
  		if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
  			data->isoc_rx_ep = ep_desc;
  			continue;
  		}
  	}
  
  	if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
  		BT_ERR("%s invalid SCO descriptors", hdev->name);
  		return -ENODEV;
  	}
  
  	return 0;
  }

  static void btusb_work(struct work_struct *work)
  {
  	struct btusb_data *data = container_of(work, struct btusb_data, work);
  	struct hci_dev *hdev = data->hdev;

  	int new_alts;

  	int err;

  	if (data->sco_num > 0) {

  		if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {

  			err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);

  			if (err < 0) {
  				clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
  				usb_kill_anchored_urbs(&data->isoc_anchor);
  				return;
  			}

  			set_bit(BTUSB_DID_ISO_RESUME, &data->flags);

  		}

  
  		if (hdev->voice_setting & 0x0020) {
  			static const int alts[3] = { 2, 4, 5 };

  			new_alts = alts[data->sco_num - 1];

  		} else {

  			new_alts = data->sco_num;

  		}
  
  		if (data->isoc_altsetting != new_alts) {

  			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
  			usb_kill_anchored_urbs(&data->isoc_anchor);

  			if (__set_isoc_interface(hdev, new_alts) < 0)

  				return;
  		}
  
  		if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {

  			if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)

  				clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
  			else

  				btusb_submit_isoc_urb(hdev, GFP_KERNEL);

  		}
  	} else {
  		clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
  		usb_kill_anchored_urbs(&data->isoc_anchor);
  
  		__set_isoc_interface(hdev, 0);

  		if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))

  			usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);

  	}
  }

  static void btusb_waker(struct work_struct *work)
  {
  	struct btusb_data *data = container_of(work, struct btusb_data, waker);
  	int err;
  
  	err = usb_autopm_get_interface(data->intf);
  	if (err < 0)
  		return;
  
  	usb_autopm_put_interface(data->intf);
  }

  static int btusb_setup_bcm92035(struct hci_dev *hdev)
  {
  	struct sk_buff *skb;
  	u8 val = 0x00;
  
  	BT_DBG("%s", hdev->name);
  
  	skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb))
  		BT_ERR("BCM92035 command failed (%ld)", -PTR_ERR(skb));
  	else
  		kfree_skb(skb);
  
  	return 0;
  }

  static int btusb_setup_csr(struct hci_dev *hdev)
  {
  	struct hci_rp_read_local_version *rp;
  	struct sk_buff *skb;
  	int ret;
  
  	BT_DBG("%s", hdev->name);
  
  	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
  			     HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		BT_ERR("Reading local version failed (%ld)", -PTR_ERR(skb));
  		return -PTR_ERR(skb);
  	}
  
  	rp = (struct hci_rp_read_local_version *) skb->data;
  
  	if (!rp->status) {
  		if (le16_to_cpu(rp->manufacturer) != 10) {
  			/* Clear the reset quirk since this is not an actual
  			 * early Bluetooth 1.1 device from CSR.
  			 */
  			clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
  
  			/* These fake CSR controllers have all a broken
  			 * stored link key handling and so just disable it.
  			 */
  			set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY,
  				&hdev->quirks);
  		}
  	}
  
  	ret = -bt_to_errno(rp->status);
  
  	kfree_skb(skb);
  
  	return ret;
  }

  struct intel_version {
  	u8 status;
  	u8 hw_platform;
  	u8 hw_variant;
  	u8 hw_revision;
  	u8 fw_variant;
  	u8 fw_revision;
  	u8 fw_build_num;
  	u8 fw_build_ww;
  	u8 fw_build_yy;
  	u8 fw_patch_num;
  } __packed;
  
  static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
  						struct intel_version *ver)
  {
  	const struct firmware *fw;
  	char fwname[64];
  	int ret;
  
  	snprintf(fwname, sizeof(fwname),
  		 "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
  		 ver->hw_platform, ver->hw_variant, ver->hw_revision,
  		 ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
  		 ver->fw_build_ww, ver->fw_build_yy);
  
  	ret = request_firmware(&fw, fwname, &hdev->dev);
  	if (ret < 0) {
  		if (ret == -EINVAL) {
  			BT_ERR("%s Intel firmware file request failed (%d)",
  			       hdev->name, ret);
  			return NULL;
  		}
  
  		BT_ERR("%s failed to open Intel firmware file: %s(%d)",
  		       hdev->name, fwname, ret);
  
  		/* If the correct firmware patch file is not found, use the
  		 * default firmware patch file instead
  		 */
  		snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
  			 ver->hw_platform, ver->hw_variant);
  		if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
  			BT_ERR("%s failed to open default Intel fw file: %s",
  			       hdev->name, fwname);
  			return NULL;
  		}
  	}
  
  	BT_INFO("%s: Intel Bluetooth firmware file: %s", hdev->name, fwname);
  
  	return fw;
  }
  
  static int btusb_setup_intel_patching(struct hci_dev *hdev,
  				      const struct firmware *fw,
  				      const u8 **fw_ptr, int *disable_patch)
  {
  	struct sk_buff *skb;
  	struct hci_command_hdr *cmd;
  	const u8 *cmd_param;
  	struct hci_event_hdr *evt = NULL;
  	const u8 *evt_param = NULL;
  	int remain = fw->size - (*fw_ptr - fw->data);
  
  	/* The first byte indicates the types of the patch command or event.
  	 * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
  	 * in the current firmware buffer doesn't start with 0x01 or
  	 * the size of remain buffer is smaller than HCI command header,
  	 * the firmware file is corrupted and it should stop the patching
  	 * process.
  	 */
  	if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
  		BT_ERR("%s Intel fw corrupted: invalid cmd read", hdev->name);
  		return -EINVAL;
  	}
  	(*fw_ptr)++;
  	remain--;
  
  	cmd = (struct hci_command_hdr *)(*fw_ptr);
  	*fw_ptr += sizeof(*cmd);
  	remain -= sizeof(*cmd);
  
  	/* Ensure that the remain firmware data is long enough than the length
  	 * of command parameter. If not, the firmware file is corrupted.
  	 */
  	if (remain < cmd->plen) {
  		BT_ERR("%s Intel fw corrupted: invalid cmd len", hdev->name);
  		return -EFAULT;
  	}
  
  	/* If there is a command that loads a patch in the firmware
  	 * file, then enable the patch upon success, otherwise just
  	 * disable the manufacturer mode, for example patch activation
  	 * is not required when the default firmware patch file is used
  	 * because there are no patch data to load.
  	 */
  	if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
  		*disable_patch = 0;
  
  	cmd_param = *fw_ptr;
  	*fw_ptr += cmd->plen;
  	remain -= cmd->plen;
  
  	/* This reads the expected events when the above command is sent to the
  	 * device. Some vendor commands expects more than one events, for
  	 * example command status event followed by vendor specific event.
  	 * For this case, it only keeps the last expected event. so the command
  	 * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
  	 * last expected event.
  	 */
  	while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
  		(*fw_ptr)++;
  		remain--;
  
  		evt = (struct hci_event_hdr *)(*fw_ptr);
  		*fw_ptr += sizeof(*evt);
  		remain -= sizeof(*evt);
  
  		if (remain < evt->plen) {
  			BT_ERR("%s Intel fw corrupted: invalid evt len",
  			       hdev->name);
  			return -EFAULT;
  		}
  
  		evt_param = *fw_ptr;
  		*fw_ptr += evt->plen;
  		remain -= evt->plen;
  	}
  
  	/* Every HCI commands in the firmware file has its correspond event.
  	 * If event is not found or remain is smaller than zero, the firmware
  	 * file is corrupted.
  	 */
  	if (!evt || !evt_param || remain < 0) {
  		BT_ERR("%s Intel fw corrupted: invalid evt read", hdev->name);
  		return -EFAULT;
  	}
  
  	skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
  				cmd_param, evt->evt, HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		BT_ERR("%s sending Intel patch command (0x%4.4x) failed (%ld)",
  		       hdev->name, cmd->opcode, PTR_ERR(skb));

  		return PTR_ERR(skb);

  	}
  
  	/* It ensures that the returned event matches the event data read from
  	 * the firmware file. At fist, it checks the length and then
  	 * the contents of the event.
  	 */
  	if (skb->len != evt->plen) {
  		BT_ERR("%s mismatch event length (opcode 0x%4.4x)", hdev->name,
  		       le16_to_cpu(cmd->opcode));
  		kfree_skb(skb);
  		return -EFAULT;
  	}
  
  	if (memcmp(skb->data, evt_param, evt->plen)) {
  		BT_ERR("%s mismatch event parameter (opcode 0x%4.4x)",
  		       hdev->name, le16_to_cpu(cmd->opcode));
  		kfree_skb(skb);
  		return -EFAULT;
  	}
  	kfree_skb(skb);
  
  	return 0;
  }
  
  static int btusb_setup_intel(struct hci_dev *hdev)
  {
  	struct sk_buff *skb;
  	const struct firmware *fw;
  	const u8 *fw_ptr;
  	int disable_patch;
  	struct intel_version *ver;
  
  	const u8 mfg_enable[] = { 0x01, 0x00 };
  	const u8 mfg_disable[] = { 0x00, 0x00 };
  	const u8 mfg_reset_deactivate[] = { 0x00, 0x01 };
  	const u8 mfg_reset_activate[] = { 0x00, 0x02 };
  
  	BT_DBG("%s", hdev->name);
  
  	/* The controller has a bug with the first HCI command sent to it
  	 * returning number of completed commands as zero. This would stall the
  	 * command processing in the Bluetooth core.
  	 *
  	 * As a workaround, send HCI Reset command first which will reset the
  	 * number of completed commands and allow normal command processing
  	 * from now on.
  	 */
  	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		BT_ERR("%s sending initial HCI reset command failed (%ld)",
  		       hdev->name, PTR_ERR(skb));

  		return PTR_ERR(skb);

  	}
  	kfree_skb(skb);
  
  	/* Read Intel specific controller version first to allow selection of
  	 * which firmware file to load.
  	 *
  	 * The returned information are hardware variant and revision plus
  	 * firmware variant, revision and build number.
  	 */
  	skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		BT_ERR("%s reading Intel fw version command failed (%ld)",
  		       hdev->name, PTR_ERR(skb));

  		return PTR_ERR(skb);

  	}
  
  	if (skb->len != sizeof(*ver)) {
  		BT_ERR("%s Intel version event length mismatch", hdev->name);
  		kfree_skb(skb);
  		return -EIO;
  	}
  
  	ver = (struct intel_version *)skb->data;
  	if (ver->status) {
  		BT_ERR("%s Intel fw version event failed (%02x)", hdev->name,
  		       ver->status);
  		kfree_skb(skb);
  		return -bt_to_errno(ver->status);
  	}
  
  	BT_INFO("%s: read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
  		hdev->name, ver->hw_platform, ver->hw_variant,
  		ver->hw_revision, ver->fw_variant,  ver->fw_revision,
  		ver->fw_build_num, ver->fw_build_ww, ver->fw_build_yy,
  		ver->fw_patch_num);
  
  	/* fw_patch_num indicates the version of patch the device currently
  	 * have. If there is no patch data in the device, it is always 0x00.
  	 * So, if it is other than 0x00, no need to patch the deivce again.
  	 */
  	if (ver->fw_patch_num) {
  		BT_INFO("%s: Intel device is already patched. patch num: %02x",
  			hdev->name, ver->fw_patch_num);
  		kfree_skb(skb);
  		return 0;
  	}
  
  	/* Opens the firmware patch file based on the firmware version read
  	 * from the controller. If it fails to open the matching firmware
  	 * patch file, it tries to open the default firmware patch file.
  	 * If no patch file is found, allow the device to operate without
  	 * a patch.
  	 */
  	fw = btusb_setup_intel_get_fw(hdev, ver);
  	if (!fw) {
  		kfree_skb(skb);
  		return 0;
  	}
  	fw_ptr = fw->data;
  
  	/* This Intel specific command enables the manufacturer mode of the
  	 * controller.
  	 *
  	 * Only while this mode is enabled, the driver can download the
  	 * firmware patch data and configuration parameters.
  	 */
  	skb = __hci_cmd_sync(hdev, 0xfc11, 2, mfg_enable, HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		BT_ERR("%s entering Intel manufacturer mode failed (%ld)",
  		       hdev->name, PTR_ERR(skb));
  		release_firmware(fw);

  		return PTR_ERR(skb);

  	}
  
  	if (skb->data[0]) {
  		u8 evt_status = skb->data[0];
  		BT_ERR("%s enable Intel manufacturer mode event failed (%02x)",
  		       hdev->name, evt_status);
  		kfree_skb(skb);
  		release_firmware(fw);
  		return -bt_to_errno(evt_status);
  	}
  	kfree_skb(skb);
  
  	disable_patch = 1;
  
  	/* The firmware data file consists of list of Intel specific HCI
  	 * commands and its expected events. The first byte indicates the
  	 * type of the message, either HCI command or HCI event.
  	 *
  	 * It reads the command and its expected event from the firmware file,
  	 * and send to the controller. Once __hci_cmd_sync_ev() returns,
  	 * the returned event is compared with the event read from the firmware
  	 * file and it will continue until all the messages are downloaded to
  	 * the controller.
  	 *
  	 * Once the firmware patching is completed successfully,
  	 * the manufacturer mode is disabled with reset and activating the
  	 * downloaded patch.
  	 *
  	 * If the firmware patching fails, the manufacturer mode is
  	 * disabled with reset and deactivating the patch.
  	 *
  	 * If the default patch file is used, no reset is done when disabling
  	 * the manufacturer.
  	 */
  	while (fw->size > fw_ptr - fw->data) {
  		int ret;
  
  		ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
  						 &disable_patch);
  		if (ret < 0)
  			goto exit_mfg_deactivate;
  	}
  
  	release_firmware(fw);
  
  	if (disable_patch)
  		goto exit_mfg_disable;
  
  	/* Patching completed successfully and disable the manufacturer mode
  	 * with reset and activate the downloaded firmware patches.
  	 */
  	skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_activate),
  			     mfg_reset_activate, HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
  		       hdev->name, PTR_ERR(skb));

  		return PTR_ERR(skb);

  	}
  	kfree_skb(skb);
  
  	BT_INFO("%s: Intel Bluetooth firmware patch completed and activated",
  		hdev->name);
  
  	return 0;
  
  exit_mfg_disable:
  	/* Disable the manufacturer mode without reset */
  	skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_disable), mfg_disable,
  			     HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
  		       hdev->name, PTR_ERR(skb));

  		return PTR_ERR(skb);

  	}
  	kfree_skb(skb);
  
  	BT_INFO("%s: Intel Bluetooth firmware patch completed", hdev->name);
  	return 0;
  
  exit_mfg_deactivate:
  	release_firmware(fw);
  
  	/* Patching failed. Disable the manufacturer mode with reset and
  	 * deactivate the downloaded firmware patches.
  	 */
  	skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_deactivate),
  			     mfg_reset_deactivate, HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
  		       hdev->name, PTR_ERR(skb));

  		return PTR_ERR(skb);

  	}
  	kfree_skb(skb);
  
  	BT_INFO("%s: Intel Bluetooth firmware patch completed and deactivated",
  		hdev->name);
  
  	return 0;
  }

  static int btusb_probe(struct usb_interface *intf,
  				const struct usb_device_id *id)
  {
  	struct usb_endpoint_descriptor *ep_desc;
  	struct btusb_data *data;
  	struct hci_dev *hdev;
  	int i, err;
  
  	BT_DBG("intf %p id %p", intf, id);

  	/* interface numbers are hardcoded in the spec */

  	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
  		return -ENODEV;
  
  	if (!id->driver_info) {
  		const struct usb_device_id *match;
  		match = usb_match_id(intf, blacklist_table);
  		if (match)
  			id = match;
  	}

  	if (id->driver_info == BTUSB_IGNORE)
  		return -ENODEV;
  
  	if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
  		return -ENODEV;
  
  	if (ignore_csr && id->driver_info & BTUSB_CSR)
  		return -ENODEV;
  
  	if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
  		return -ENODEV;

  	if (id->driver_info & BTUSB_ATH3012) {
  		struct usb_device *udev = interface_to_usbdev(intf);
  
  		/* Old firmware would otherwise let ath3k driver load
  		 * patch and sysconfig files */
  		if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
  			return -ENODEV;
  	}

  	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);

  	if (!data)
  		return -ENOMEM;
  
  	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
  		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
  
  		if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
  			data->intr_ep = ep_desc;
  			continue;
  		}
  
  		if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
  			data->bulk_tx_ep = ep_desc;
  			continue;
  		}
  
  		if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
  			data->bulk_rx_ep = ep_desc;
  			continue;
  		}
  	}

  	if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)

  		return -ENODEV;

  	data->cmdreq_type = USB_TYPE_CLASS;

  	data->udev = interface_to_usbdev(intf);

  	data->intf = intf;

  
  	spin_lock_init(&data->lock);
  
  	INIT_WORK(&data->work, btusb_work);

  	INIT_WORK(&data->waker, btusb_waker);
  	spin_lock_init(&data->txlock);

  
  	init_usb_anchor(&data->tx_anchor);
  	init_usb_anchor(&data->intr_anchor);
  	init_usb_anchor(&data->bulk_anchor);

  	init_usb_anchor(&data->isoc_anchor);

  	init_usb_anchor(&data->deferred);

  
  	hdev = hci_alloc_dev();

  	if (!hdev)

  		return -ENOMEM;

  	hdev->bus = HCI_USB;

  	hci_set_drvdata(hdev, data);

  
  	data->hdev = hdev;
  
  	SET_HCIDEV_DEV(hdev, &intf->dev);

  	hdev->open   = btusb_open;
  	hdev->close  = btusb_close;
  	hdev->flush  = btusb_flush;
  	hdev->send   = btusb_send_frame;
  	hdev->notify = btusb_notify;
  
  	if (id->driver_info & BTUSB_BCM92035)
  		hdev->setup = btusb_setup_bcm92035;

  	if (id->driver_info & BTUSB_INTEL) {
  		usb_enable_autosuspend(data->udev);

  		hdev->setup = btusb_setup_intel;

  	}

  	/* Interface numbers are hardcoded in the specification */

  	data->isoc = usb_ifnum_to_if(data->udev, 1);

  	if (!reset)

  		set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);

  
  	if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
  		if (!disable_scofix)
  			set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
  	}

  	if (id->driver_info & BTUSB_BROKEN_ISOC)
  		data->isoc = NULL;

  	if (id->driver_info & BTUSB_DIGIANSWER) {
  		data->cmdreq_type = USB_TYPE_VENDOR;

  		set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);

  	}
  
  	if (id->driver_info & BTUSB_CSR) {
  		struct usb_device *udev = data->udev;

  		u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);

  
  		/* Old firmware would otherwise execute USB reset */

  		if (bcdDevice < 0x117)

  			set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);

  
  		/* Fake CSR devices with broken commands */
  		if (bcdDevice <= 0x100)
  			hdev->setup = btusb_setup_csr;

  	}

  	if (id->driver_info & BTUSB_SNIFFER) {

  		struct usb_device *udev = data->udev;

  		/* New sniffer firmware has crippled HCI interface */

  		if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
  			set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);

  
  		data->isoc = NULL;

  	}

  	if (data->isoc) {
  		err = usb_driver_claim_interface(&btusb_driver,

  							data->isoc, data);

  		if (err < 0) {
  			hci_free_dev(hdev);

  			return err;
  		}
  	}

  	err = hci_register_dev(hdev);
  	if (err < 0) {
  		hci_free_dev(hdev);

  		return err;
  	}
  
  	usb_set_intfdata(intf, data);
  
  	return 0;
  }
  
  static void btusb_disconnect(struct usb_interface *intf)
  {
  	struct btusb_data *data = usb_get_intfdata(intf);
  	struct hci_dev *hdev;
  
  	BT_DBG("intf %p", intf);
  
  	if (!data)
  		return;
  
  	hdev = data->hdev;

  	usb_set_intfdata(data->intf, NULL);
  
  	if (data->isoc)
  		usb_set_intfdata(data->isoc, NULL);

  
  	hci_unregister_dev(hdev);

  	if (intf == data->isoc)
  		usb_driver_release_interface(&btusb_driver, data->intf);
  	else if (data->isoc)
  		usb_driver_release_interface(&btusb_driver, data->isoc);

  	hci_free_dev(hdev);
  }

  #ifdef CONFIG_PM

  static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
  {
  	struct btusb_data *data = usb_get_intfdata(intf);
  
  	BT_DBG("intf %p", intf);
  
  	if (data->suspend_count++)
  		return 0;

  	spin_lock_irq(&data->txlock);

  	if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {

  		set_bit(BTUSB_SUSPENDING, &data->flags);
  		spin_unlock_irq(&data->txlock);
  	} else {
  		spin_unlock_irq(&data->txlock);
  		data->suspend_count--;
  		return -EBUSY;
  	}

  	cancel_work_sync(&data->work);

  	btusb_stop_traffic(data);

  	usb_kill_anchored_urbs(&data->tx_anchor);

  	return 0;
  }

  static void play_deferred(struct btusb_data *data)
  {
  	struct urb *urb;
  	int err;
  
  	while ((urb = usb_get_from_anchor(&data->deferred))) {
  		err = usb_submit_urb(urb, GFP_ATOMIC);
  		if (err < 0)
  			break;
  
  		data->tx_in_flight++;
  	}
  	usb_scuttle_anchored_urbs(&data->deferred);
  }

  static int btusb_resume(struct usb_interface *intf)
  {
  	struct btusb_data *data = usb_get_intfdata(intf);
  	struct hci_dev *hdev = data->hdev;

  	int err = 0;

  
  	BT_DBG("intf %p", intf);
  
  	if (--data->suspend_count)
  		return 0;
  
  	if (!test_bit(HCI_RUNNING, &hdev->flags))

  		goto done;

  
  	if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
  		err = btusb_submit_intr_urb(hdev, GFP_NOIO);
  		if (err < 0) {
  			clear_bit(BTUSB_INTR_RUNNING, &data->flags);

  			goto failed;

  		}
  	}
  
  	if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {

  		err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
  		if (err < 0) {

  			clear_bit(BTUSB_BULK_RUNNING, &data->flags);

  			goto failed;
  		}
  
  		btusb_submit_bulk_urb(hdev, GFP_NOIO);

  	}
  
  	if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
  		if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
  			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
  		else
  			btusb_submit_isoc_urb(hdev, GFP_NOIO);
  	}

  	spin_lock_irq(&data->txlock);
  	play_deferred(data);
  	clear_bit(BTUSB_SUSPENDING, &data->flags);
  	spin_unlock_irq(&data->txlock);
  	schedule_work(&data->work);

  	return 0;

  
  failed:
  	usb_scuttle_anchored_urbs(&data->deferred);
  done:
  	spin_lock_irq(&data->txlock);
  	clear_bit(BTUSB_SUSPENDING, &data->flags);
  	spin_unlock_irq(&data->txlock);
  
  	return err;

  }

  #endif

  static struct usb_driver btusb_driver = {
  	.name		= "btusb",
  	.probe		= btusb_probe,
  	.disconnect	= btusb_disconnect,

  #ifdef CONFIG_PM

  	.suspend	= btusb_suspend,
  	.resume		= btusb_resume,

  #endif

  	.id_table	= btusb_table,

  	.supports_autosuspend = 1,

  	.disable_hub_initiated_lpm = 1,

  };

  module_usb_driver(btusb_driver);

  module_param(ignore_dga, bool, 0644);
  MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
  
  module_param(ignore_csr, bool, 0644);
  MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
  
  module_param(ignore_sniffer, bool, 0644);
  MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
  
  module_param(disable_scofix, bool, 0644);
  MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
  
  module_param(force_scofix, bool, 0644);
  MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
  
  module_param(reset, bool, 0644);
  MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");

  MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
  MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
  MODULE_VERSION(VERSION);
  MODULE_LICENSE("GPL");