/*
   *
   *  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 <asm/unaligned.h>

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

  #include "btintel.h"

  #include "btbcm.h"

  #include "btrtl.h"

  #define VERSION "0.8"

  static bool disable_scofix;
  static bool force_scofix;

  static bool reset = true;

  
  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

  #define BTUSB_INTEL_BOOT	0x200
  #define BTUSB_BCM_PATCHRAM	0x400

  #define BTUSB_MARVELL		0x800

  #define BTUSB_SWAVE		0x1000

  #define BTUSB_INTEL_NEW		0x2000

  #define BTUSB_AMP		0x4000

  #define BTUSB_QCA_ROME		0x8000

  #define BTUSB_BCM_APPLE		0x10000

  #define BTUSB_REALTEK		0x20000

  #define BTUSB_BCM2045		0x40000

  #define BTUSB_IFNUM_2		0x80000

  static const struct usb_device_id btusb_table[] = {

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

  	/* Generic Bluetooth AMP device */
  	{ USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },

  	/* Generic Bluetooth USB interface */
  	{ USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },

  	/* Apple-specific (Broadcom) devices */

  	{ USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),

  	  .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },

  	/* 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), .driver_info = BTUSB_SWAVE },

  
  	/* 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(0x413c, 0x8197) },

  	/* Broadcom BCM20702B0 (Dynex/Insignia) */
  	{ USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },

  	/* Broadcom BCM43142A0 (Foxconn/Lenovo) */
  	{ USB_DEVICE(0x105b, 0xe065), .driver_info = BTUSB_BCM_PATCHRAM },

  	/* Foxconn - Hon Hai */

  	{ USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
  	  .driver_info = BTUSB_BCM_PATCHRAM },

  	/* Lite-On Technology - Broadcom based */
  	{ USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
  	  .driver_info = BTUSB_BCM_PATCHRAM },

  	/* Broadcom devices with vendor specific id */

  	{ USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
  	  .driver_info = BTUSB_BCM_PATCHRAM },

  	/* ASUSTek Computer - Broadcom based */

  	{ USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
  	  .driver_info = BTUSB_BCM_PATCHRAM },

  	/* Belkin F8065bf - Broadcom based */

  	{ USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
  	  .driver_info = BTUSB_BCM_PATCHRAM },

  	/* IMC Networks - Broadcom based */

  	{ USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
  	  .driver_info = BTUSB_BCM_PATCHRAM },

  	/* Toshiba Corp - Broadcom based */
  	{ USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
  	  .driver_info = BTUSB_BCM_PATCHRAM },

  	/* Intel Bluetooth USB Bootloader (RAM module) */

  	{ USB_DEVICE(0x8087, 0x0a5a),
  	  .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },

  	{ }	/* 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 },

  	/* Broadcom BCM2045 devices */
  	{ USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },

  	/* Atheros 3011 with sflash firmware */

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

  	{ USB_DEVICE(0x04f2, 0xaff1), .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(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0489, 0xe078), .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, 0x3007), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
  	{ USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x0930, 0x0227), .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, 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, 0x817b), .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(0x0cf3, 0xe006), .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 },

  	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },

  	{ USB_DEVICE(0x13d3, 0x3474), .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 },

  	/* QCA ROME chipset */

  	{ USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME },

  	{ USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME },
  	{ USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME },

  	/* 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 },

  	/* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */

  	{ USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },

  	/* 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 | BTUSB_BROKEN_ISOC },

  
  	/* Frontline ComProbe Bluetooth Sniffer */

  	{ USB_DEVICE(0x16d3, 0x0002),
  	  .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },

  	/* Marvell Bluetooth devices */
  	{ USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
  	{ USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },

  	/* Intel Bluetooth devices */

  	{ USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },

  	{ USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },

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

  	{ USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_NEW },

  	/* Other Intel Bluetooth devices */
  	{ USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
  	  .driver_info = BTUSB_IGNORE },

  	/* Realtek Bluetooth devices */
  	{ USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
  	  .driver_info = BTUSB_REALTEK },
  
  	/* Additional Realtek 8723AE Bluetooth devices */
  	{ USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
  	{ USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
  
  	/* Additional Realtek 8723BE Bluetooth devices */
  	{ USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
  	{ USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
  	{ USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
  	{ USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
  	{ USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
  
  	/* Additional Realtek 8821AE Bluetooth devices */
  	{ USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
  	{ USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
  	{ USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
  	{ USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
  	{ USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },

  	/* Silicon Wave based devices */
  	{ USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },

  	{ }	/* 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

  #define BTUSB_BOOTLOADER	5
  #define BTUSB_DOWNLOADING	6

  #define BTUSB_FIRMWARE_LOADED	7

  #define BTUSB_FIRMWARE_FAILED	8

  #define BTUSB_BOOTING		9

  #define BTUSB_RESET_RESUME	10

  #define BTUSB_DIAG_RUNNING	11

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

  	struct usb_interface *intf;

  	struct usb_interface *isoc;

  	struct usb_interface *diag;

  	unsigned long flags;
  
  	struct work_struct work;

  	struct work_struct waker;

  	struct usb_anchor deferred;

  	struct usb_anchor tx_anchor;

  	int tx_in_flight;
  	spinlock_t txlock;

  	struct usb_anchor intr_anchor;
  	struct usb_anchor bulk_anchor;

  	struct usb_anchor isoc_anchor;

  	struct usb_anchor diag_anchor;

  	spinlock_t rxlock;
  
  	struct sk_buff *evt_skb;
  	struct sk_buff *acl_skb;
  	struct sk_buff *sco_skb;

  
  	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;

  	struct usb_endpoint_descriptor *diag_tx_ep;
  	struct usb_endpoint_descriptor *diag_rx_ep;

  	__u8 cmdreq_type;

  	__u8 cmdreq;

  	unsigned int sco_num;

  	int isoc_altsetting;

  	int suspend_count;

  	int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);

  	int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);

  
  	int (*setup_on_usb)(struct hci_dev *hdev);

  };

  static inline void btusb_free_frags(struct btusb_data *data)
  {
  	unsigned long flags;
  
  	spin_lock_irqsave(&data->rxlock, flags);
  
  	kfree_skb(data->evt_skb);
  	data->evt_skb = NULL;
  
  	kfree_skb(data->acl_skb);
  	data->acl_skb = NULL;
  
  	kfree_skb(data->sco_skb);
  	data->sco_skb = NULL;
  
  	spin_unlock_irqrestore(&data->rxlock, flags);
  }

  static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
  {

  	struct sk_buff *skb;
  	int err = 0;
  
  	spin_lock(&data->rxlock);
  	skb = data->evt_skb;
  
  	while (count) {
  		int len;
  
  		if (!skb) {
  			skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
  			if (!skb) {
  				err = -ENOMEM;
  				break;
  			}

  			hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
  			hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;

  		}

  		len = min_t(uint, hci_skb_expect(skb), count);

  		memcpy(skb_put(skb, len), buffer, len);
  
  		count -= len;
  		buffer += len;

  		hci_skb_expect(skb) -= len;

  
  		if (skb->len == HCI_EVENT_HDR_SIZE) {
  			/* Complete event header */

  			hci_skb_expect(skb) = hci_event_hdr(skb)->plen;

  			if (skb_tailroom(skb) < hci_skb_expect(skb)) {

  				kfree_skb(skb);
  				skb = NULL;
  
  				err = -EILSEQ;
  				break;
  			}
  		}

  		if (!hci_skb_expect(skb)) {

  			/* Complete frame */

  			data->recv_event(data->hdev, skb);

  			skb = NULL;
  		}
  	}
  
  	data->evt_skb = skb;
  	spin_unlock(&data->rxlock);
  
  	return err;

  }
  
  static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
  {

  	struct sk_buff *skb;
  	int err = 0;
  
  	spin_lock(&data->rxlock);
  	skb = data->acl_skb;
  
  	while (count) {
  		int len;
  
  		if (!skb) {
  			skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
  			if (!skb) {
  				err = -ENOMEM;
  				break;
  			}

  			hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
  			hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;

  		}

  		len = min_t(uint, hci_skb_expect(skb), count);

  		memcpy(skb_put(skb, len), buffer, len);
  
  		count -= len;
  		buffer += len;

  		hci_skb_expect(skb) -= len;

  
  		if (skb->len == HCI_ACL_HDR_SIZE) {
  			__le16 dlen = hci_acl_hdr(skb)->dlen;
  
  			/* Complete ACL header */

  			hci_skb_expect(skb) = __le16_to_cpu(dlen);

  			if (skb_tailroom(skb) < hci_skb_expect(skb)) {

  				kfree_skb(skb);
  				skb = NULL;
  
  				err = -EILSEQ;
  				break;
  			}
  		}

  		if (!hci_skb_expect(skb)) {

  			/* Complete frame */
  			hci_recv_frame(data->hdev, skb);
  			skb = NULL;
  		}
  	}
  
  	data->acl_skb = skb;
  	spin_unlock(&data->rxlock);
  
  	return err;

  }
  
  static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
  {

  	struct sk_buff *skb;
  	int err = 0;
  
  	spin_lock(&data->rxlock);
  	skb = data->sco_skb;
  
  	while (count) {
  		int len;
  
  		if (!skb) {
  			skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
  			if (!skb) {
  				err = -ENOMEM;
  				break;
  			}

  			hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
  			hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;

  		}

  		len = min_t(uint, hci_skb_expect(skb), count);

  		memcpy(skb_put(skb, len), buffer, len);
  
  		count -= len;
  		buffer += len;

  		hci_skb_expect(skb) -= len;

  
  		if (skb->len == HCI_SCO_HDR_SIZE) {
  			/* Complete SCO header */

  			hci_skb_expect(skb) = hci_sco_hdr(skb)->dlen;

  			if (skb_tailroom(skb) < hci_skb_expect(skb)) {

  				kfree_skb(skb);
  				skb = NULL;
  
  				err = -EILSEQ;
  				break;
  			}
  		}

  		if (!hci_skb_expect(skb)) {

  			/* Complete frame */
  			hci_recv_frame(data->hdev, skb);
  			skb = NULL;
  		}
  	}
  
  	data->sco_skb = skb;
  	spin_unlock(&data->rxlock);
  
  	return err;

  }

  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 (btusb_recv_intr(data, urb->transfer_buffer,
  				    urb->actual_length) < 0) {

  			BT_ERR("%s corrupted event packet", hdev->name);
  			hdev->stat.err_rx++;
  		}

  	} else if (urb->status == -ENOENT) {
  		/* Avoid suspend failed when usb_kill_urb */
  		return;

  	}
  
  	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 (data->recv_bulk(data, urb->transfer_buffer,

  				    urb->actual_length) < 0) {

  			BT_ERR("%s corrupted ACL packet", hdev->name);
  			hdev->stat.err_rx++;
  		}

  	} else if (urb->status == -ENOENT) {
  		/* Avoid suspend failed when usb_kill_urb */
  		return;

  	}
  
  	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 (btusb_recv_isoc(data, urb->transfer_buffer + offset,
  					    length) < 0) {

  				BT_ERR("%s corrupted SCO packet", hdev->name);
  				hdev->stat.err_rx++;
  			}
  		}

  	} else if (urb->status == -ENOENT) {
  		/* Avoid suspend failed when usb_kill_urb */
  		return;

  	}
  
  	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_diag_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 (urb->status == 0) {
  		struct sk_buff *skb;
  
  		skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
  		if (skb) {
  			memcpy(skb_put(skb, urb->actual_length),
  			       urb->transfer_buffer, urb->actual_length);
  			hci_recv_diag(hdev, skb);
  		}
  	} else if (urb->status == -ENOENT) {
  		/* Avoid suspend failed when usb_kill_urb */
  		return;
  	}
  
  	if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
  		return;
  
  	usb_anchor_urb(urb, &data->diag_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_diag_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->diag_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->diag_rx_ep->bEndpointAddress);
  
  	usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
  			  btusb_diag_complete, hdev);
  
  	urb->transfer_flags |= URB_FREE_BUFFER;
  
  	usb_mark_last_busy(data->udev);
  	usb_anchor_urb(urb, &data->diag_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);

  	/* Patching USB firmware files prior to starting any URBs of HCI path
  	 * It is more safe to use USB bulk channel for downloading USB patch
  	 */
  	if (data->setup_on_usb) {
  		err = data->setup_on_usb(hdev);

  		if (err < 0)

  			return err;
  	}

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

  	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);

  	if (data->diag) {
  		if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
  			set_bit(BTUSB_DIAG_RUNNING, &data->flags);
  	}

  done:
  	usb_autopm_put_interface(data->intf);

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

  	usb_kill_anchored_urbs(&data->diag_anchor);

  }

  static int btusb_close(struct hci_dev *hdev)
  {

  	struct btusb_data *data = hci_get_drvdata(hdev);

  	int err;

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

  	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);

  	clear_bit(BTUSB_DIAG_RUNNING, &data->flags);

  
  	btusb_stop_traffic(data);

  	btusb_free_frags(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);

  	btusb_free_frags(data);

  
  	return 0;
  }

  static struct urb *alloc_ctrl_urb(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;

  	urb = usb_alloc_urb(0, GFP_KERNEL);
  	if (!urb)
  		return ERR_PTR(-ENOMEM);

  	dr = kmalloc(sizeof(*dr), GFP_KERNEL);
  	if (!dr) {
  		usb_free_urb(urb);
  		return ERR_PTR(-ENOMEM);
  	}

  	dr->bRequestType = data->cmdreq_type;

  	dr->bRequest     = data->cmdreq;

  	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);

  	skb->dev = (void *)hdev;

  	return urb;
  }

  static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
  {
  	struct btusb_data *data = hci_get_drvdata(hdev);
  	struct urb *urb;
  	unsigned int pipe;

  	if (!data->bulk_tx_ep)
  		return ERR_PTR(-ENODEV);

  	urb = usb_alloc_urb(0, GFP_KERNEL);
  	if (!urb)
  		return ERR_PTR(-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);

  	skb->dev = (void *)hdev;

  	return urb;
  }

  static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
  {
  	struct btusb_data *data = hci_get_drvdata(hdev);
  	struct urb *urb;
  	unsigned int pipe;

  	if (!data->isoc_tx_ep)
  		return ERR_PTR(-ENODEV);

  	urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
  	if (!urb)
  		return ERR_PTR(-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));

  	skb->dev = (void *)hdev;

  
  	return urb;
  }
  
  static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
  {
  	struct btusb_data *data = hci_get_drvdata(hdev);
  	int err;

  	usb_anchor_urb(urb, &data->tx_anchor);

  	err = usb_submit_urb(urb, GFP_KERNEL);

  	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);

  	}

  	usb_free_urb(urb);

  	return err;
  }

  static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
  {
  	struct btusb_data *data = hci_get_drvdata(hdev);
  	unsigned long flags;
  	bool suspending;
  
  	spin_lock_irqsave(&data->txlock, flags);
  	suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
  	if (!suspending)
  		data->tx_in_flight++;
  	spin_unlock_irqrestore(&data->txlock, flags);
  
  	if (!suspending)
  		return submit_tx_urb(hdev, urb);
  
  	usb_anchor_urb(urb, &data->deferred);
  	schedule_work(&data->waker);
  
  	usb_free_urb(urb);
  	return 0;
  }
  
  static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
  {
  	struct urb *urb;
  
  	BT_DBG("%s", hdev->name);

  	switch (hci_skb_pkt_type(skb)) {

  	case HCI_COMMAND_PKT:
  		urb = alloc_ctrl_urb(hdev, skb);
  		if (IS_ERR(urb))
  			return PTR_ERR(urb);
  
  		hdev->stat.cmd_tx++;
  		return submit_or_queue_tx_urb(hdev, urb);
  
  	case HCI_ACLDATA_PKT:
  		urb = alloc_bulk_urb(hdev, skb);
  		if (IS_ERR(urb))
  			return PTR_ERR(urb);
  
  		hdev->stat.acl_tx++;
  		return submit_or_queue_tx_urb(hdev, urb);
  
  	case HCI_SCODATA_PKT:
  		if (hci_conn_num(hdev, SCO_LINK) < 1)
  			return -ENODEV;
  
  		urb = alloc_isoc_urb(hdev, skb);
  		if (IS_ERR(urb))
  			return PTR_ERR(urb);
  
  		hdev->stat.sco_tx++;
  		return submit_tx_urb(hdev, urb);
  	}
  
  	return -EILSEQ;
  }

  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) {

  			unsigned long flags;

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

  			/* When isochronous alternate setting needs to be
  			 * changed, because SCO connection has been added
  			 * or removed, a packet fragment may be left in the
  			 * reassembling state. This could lead to wrongly
  			 * assembled fragments.
  			 *
  			 * Clear outstanding fragment when selecting a new
  			 * alternate setting.
  			 */

  			spin_lock_irqsave(&data->rxlock, flags);

  			kfree_skb(data->sco_skb);
  			data->sco_skb = NULL;

  			spin_unlock_irqrestore(&data->rxlock, flags);

  			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;

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

  	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
  			     HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		int err = PTR_ERR(skb);
  		BT_ERR("%s: CSR: Local version failed (%d)", hdev->name, err);
  		return err;
  	}
  
  	if (skb->len != sizeof(struct hci_rp_read_local_version)) {
  		BT_ERR("%s: CSR: Local version length mismatch", hdev->name);
  		kfree_skb(skb);
  		return -EIO;
  	}

  	rp = (struct hci_rp_read_local_version *)skb->data;

  	/* Detect controllers which aren't real CSR ones. */
  	if (le16_to_cpu(rp->manufacturer) != 10 ||
  	    le16_to_cpu(rp->lmp_subver) == 0x0c5c) {

  		/* 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);
  	}

  
  	kfree_skb(skb);

  	return 0;

  }

  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, err;

  	struct intel_version ver;

  	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.
  	 */

  	err = btintel_read_version(hdev, &ver);
  	if (err)
  		return err;

  
  	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 device again.

  	 */

  	if (ver.fw_patch_num) {

  		BT_INFO("%s: Intel device is already patched. patch num: %02x",

  			hdev->name, ver.fw_patch_num);

  		goto complete;

  	}
  
  	/* 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)

  		goto complete;

  	fw_ptr = fw->data;

  	/* Enable the manufacturer mode of the controller.

  	 * Only while this mode is enabled, the driver can download the
  	 * firmware patch data and configuration parameters.
  	 */

  	err = btintel_enter_mfg(hdev);
  	if (err) {

  		release_firmware(fw);

  		return err;

  	}

  	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.
  	 */

  	err = btintel_exit_mfg(hdev, true, true);
  	if (err)
  		return err;

  
  	BT_INFO("%s: Intel Bluetooth firmware patch completed and activated",
  		hdev->name);

  	goto complete;

  
  exit_mfg_disable:
  	/* Disable the manufacturer mode without reset */

  	err = btintel_exit_mfg(hdev, false, false);
  	if (err)
  		return err;

  
  	BT_INFO("%s: Intel Bluetooth firmware patch completed", hdev->name);

  	goto complete;

  
  exit_mfg_deactivate:
  	release_firmware(fw);
  
  	/* Patching failed. Disable the manufacturer mode with reset and
  	 * deactivate the downloaded firmware patches.
  	 */

  	err = btintel_exit_mfg(hdev, true, false);
  	if (err)
  		return err;

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

  complete:
  	/* Set the event mask for Intel specific vendor events. This enables
  	 * a few extra events that are useful during general operation.
  	 */
  	btintel_set_event_mask_mfg(hdev, false);

  	btintel_check_bdaddr(hdev);

  	return 0;
  }

  static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
  {
  	struct sk_buff *skb;
  	struct hci_event_hdr *hdr;
  	struct hci_ev_cmd_complete *evt;
  
  	skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
  	if (!skb)
  		return -ENOMEM;
  
  	hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr));
  	hdr->evt = HCI_EV_CMD_COMPLETE;
  	hdr->plen = sizeof(*evt) + 1;
  
  	evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt));
  	evt->ncmd = 0x01;
  	evt->opcode = cpu_to_le16(opcode);
  
  	*skb_put(skb, 1) = 0x00;

  	hci_skb_pkt_type(skb) = HCI_EVENT_PKT;

  
  	return hci_recv_frame(hdev, skb);
  }
  
  static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
  				 int count)
  {
  	/* When the device is in bootloader mode, then it can send
  	 * events via the bulk endpoint. These events are treated the
  	 * same way as the ones received from the interrupt endpoint.
  	 */
  	if (test_bit(BTUSB_BOOTLOADER, &data->flags))
  		return btusb_recv_intr(data, buffer, count);
  
  	return btusb_recv_bulk(data, buffer, count);
  }

  static void btusb_intel_bootup(struct btusb_data *data, const void *ptr,
  			       unsigned int len)
  {
  	const struct intel_bootup *evt = ptr;
  
  	if (len != sizeof(*evt))
  		return;
  
  	if (test_and_clear_bit(BTUSB_BOOTING, &data->flags)) {
  		smp_mb__after_atomic();
  		wake_up_bit(&data->flags, BTUSB_BOOTING);
  	}
  }
  
  static void btusb_intel_secure_send_result(struct btusb_data *data,
  					   const void *ptr, unsigned int len)
  {
  	const struct intel_secure_send_result *evt = ptr;
  
  	if (len != sizeof(*evt))
  		return;
  
  	if (evt->result)
  		set_bit(BTUSB_FIRMWARE_FAILED, &data->flags);
  
  	if (test_and_clear_bit(BTUSB_DOWNLOADING, &data->flags) &&
  	    test_bit(BTUSB_FIRMWARE_LOADED, &data->flags)) {
  		smp_mb__after_atomic();
  		wake_up_bit(&data->flags, BTUSB_DOWNLOADING);
  	}
  }

  static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
  {
  	struct btusb_data *data = hci_get_drvdata(hdev);
  
  	if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
  		struct hci_event_hdr *hdr = (void *)skb->data;

  		if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
  		    hdr->plen > 0) {
  			const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
  			unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
  
  			switch (skb->data[2]) {
  			case 0x02:
  				/* When switching to the operational firmware
  				 * the device sends a vendor specific event
  				 * indicating that the bootup completed.
  				 */
  				btusb_intel_bootup(data, ptr, len);
  				break;
  			case 0x06:
  				/* When the firmware loading completes the
  				 * device sends out a vendor specific event
  				 * indicating the result of the firmware
  				 * loading.
  				 */
  				btusb_intel_secure_send_result(data, ptr, len);
  				break;

  			}

  		}
  	}
  
  	return hci_recv_frame(hdev, skb);
  }
  
  static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
  {
  	struct btusb_data *data = hci_get_drvdata(hdev);
  	struct urb *urb;
  
  	BT_DBG("%s", hdev->name);

  	switch (hci_skb_pkt_type(skb)) {

  	case HCI_COMMAND_PKT:
  		if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
  			struct hci_command_hdr *cmd = (void *)skb->data;
  			__u16 opcode = le16_to_cpu(cmd->opcode);
  
  			/* When in bootloader mode and the command 0xfc09
  			 * is received, it needs to be send down the
  			 * bulk endpoint. So allocate a bulk URB instead.
  			 */
  			if (opcode == 0xfc09)
  				urb = alloc_bulk_urb(hdev, skb);
  			else
  				urb = alloc_ctrl_urb(hdev, skb);
  
  			/* When the 0xfc01 command is issued to boot into
  			 * the operational firmware, it will actually not
  			 * send a command complete event. To keep the flow
  			 * control working inject that event here.
  			 */
  			if (opcode == 0xfc01)
  				inject_cmd_complete(hdev, opcode);
  		} else {
  			urb = alloc_ctrl_urb(hdev, skb);
  		}
  		if (IS_ERR(urb))
  			return PTR_ERR(urb);
  
  		hdev->stat.cmd_tx++;
  		return submit_or_queue_tx_urb(hdev, urb);
  
  	case HCI_ACLDATA_PKT:
  		urb = alloc_bulk_urb(hdev, skb);
  		if (IS_ERR(urb))
  			return PTR_ERR(urb);
  
  		hdev->stat.acl_tx++;
  		return submit_or_queue_tx_urb(hdev, urb);
  
  	case HCI_SCODATA_PKT:
  		if (hci_conn_num(hdev, SCO_LINK) < 1)
  			return -ENODEV;
  
  		urb = alloc_isoc_urb(hdev, skb);
  		if (IS_ERR(urb))
  			return PTR_ERR(urb);
  
  		hdev->stat.sco_tx++;
  		return submit_tx_urb(hdev, urb);
  	}
  
  	return -EILSEQ;
  }

  static int btusb_setup_intel_new(struct hci_dev *hdev)
  {
  	static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01,
  					  0x00, 0x08, 0x04, 0x00 };
  	struct btusb_data *data = hci_get_drvdata(hdev);
  	struct sk_buff *skb;

  	struct intel_version ver;

  	struct intel_boot_params *params;
  	const struct firmware *fw;
  	const u8 *fw_ptr;

  	u32 frag_len;

  	char fwname[64];
  	ktime_t calltime, delta, rettime;
  	unsigned long long duration;
  	int err;
  
  	BT_DBG("%s", hdev->name);
  
  	calltime = ktime_get();
  
  	/* Read the Intel version information to determine if the device
  	 * is in bootloader mode or if it already has operational firmware
  	 * loaded.
  	 */

  	err = btintel_read_version(hdev, &ver);
  	if (err)
  		return err;

  
  	/* The hardware platform number has a fixed value of 0x37 and
  	 * for now only accept this single value.
  	 */

  	if (ver.hw_platform != 0x37) {

  		BT_ERR("%s: Unsupported Intel hardware platform (%u)",

  		       hdev->name, ver.hw_platform);

  		return -EINVAL;
  	}
  
  	/* At the moment only the hardware variant iBT 3.0 (LnP/SfP) is
  	 * supported by this firmware loading method. This check has been
  	 * put in place to ensure correct forward compatibility options
  	 * when newer hardware variants come along.
  	 */

  	if (ver.hw_variant != 0x0b) {

  		BT_ERR("%s: Unsupported Intel hardware variant (%u)",

  		       hdev->name, ver.hw_variant);

  		return -EINVAL;
  	}

  	btintel_version_info(hdev, &ver);

  
  	/* The firmware variant determines if the device is in bootloader
  	 * mode or is running operational firmware. The value 0x06 identifies
  	 * the bootloader and the value 0x23 identifies the operational
  	 * firmware.
  	 *
  	 * When the operational firmware is already present, then only
  	 * the check for valid Bluetooth device address is needed. This
  	 * determines if the device will be added as configured or
  	 * unconfigured controller.
  	 *
  	 * It is not possible to use the Secure Boot Parameters in this
  	 * case since that command is only available in bootloader mode.
  	 */

  	if (ver.fw_variant == 0x23) {

  		clear_bit(BTUSB_BOOTLOADER, &data->flags);

  		btintel_check_bdaddr(hdev);

  		return 0;
  	}
  
  	/* If the device is not in bootloader mode, then the only possible
  	 * choice is to return an error and abort the device initialization.
  	 */

  	if (ver.fw_variant != 0x06) {

  		BT_ERR("%s: Unsupported Intel firmware variant (%u)",

  		       hdev->name, ver.fw_variant);

  		return -ENODEV;
  	}

  	/* Read the secure boot parameters to identify the operating
  	 * details of the bootloader.
  	 */
  	skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
  	if (IS_ERR(skb)) {
  		BT_ERR("%s: Reading Intel boot parameters failed (%ld)",
  		       hdev->name, PTR_ERR(skb));
  		return PTR_ERR(skb);
  	}
  
  	if (skb->len != sizeof(*params)) {
  		BT_ERR("%s: Intel boot parameters size mismatch", hdev->name);
  		kfree_skb(skb);
  		return -EILSEQ;
  	}
  
  	params = (struct intel_boot_params *)skb->data;

  
  	BT_INFO("%s: Device revision is %u", hdev->name,
  		le16_to_cpu(params->dev_revid));
  
  	BT_INFO("%s: Secure boot is %s", hdev->name,
  		params->secure_boot ? "enabled" : "disabled");

  	BT_INFO("%s: OTP lock is %s", hdev->name,
  		params->otp_lock ? "enabled" : "disabled");
  
  	BT_INFO("%s: API lock is %s", hdev->name,
  		params->api_lock ? "enabled" : "disabled");
  
  	BT_INFO("%s: Debug lock is %s", hdev->name,
  		params->debug_lock ? "enabled" : "disabled");

  	BT_INFO("%s: Minimum firmware build %u week %u %u", hdev->name,
  		params->min_fw_build_nn, params->min_fw_build_cw,
  		2000 + params->min_fw_build_yy);
  
  	/* It is required that every single firmware fragment is acknowledged
  	 * with a command complete event. If the boot parameters indicate
  	 * that this bootloader does not send them, then abort the setup.
  	 */
  	if (params->limited_cce != 0x00) {
  		BT_ERR("%s: Unsupported Intel firmware loading method (%u)",
  		       hdev->name, params->limited_cce);
  		kfree_skb(skb);
  		return -EINVAL;
  	}
  
  	/* If the OTP has no valid Bluetooth device address, then there will
  	 * also be no valid address for the operational firmware.
  	 */
  	if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
  		BT_INFO("%s: No device address configured", hdev->name);
  		set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
  	}
  
  	/* With this Intel bootloader only the hardware variant and device
  	 * revision information are used to select the right firmware.
  	 *
  	 * Currently this bootloader support is limited to hardware variant
  	 * iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b).
  	 */
  	snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi",
  		 le16_to_cpu(params->dev_revid));
  
  	err = request_firmware(&fw, fwname, &hdev->dev);
  	if (err < 0) {
  		BT_ERR("%s: Failed to load Intel firmware file (%d)",
  		       hdev->name, err);
  		kfree_skb(skb);
  		return err;
  	}
  
  	BT_INFO("%s: Found device firmware: %s", hdev->name, fwname);

  	/* Save the DDC file name for later use to apply once the firmware
  	 * downloading is done.
  	 */
  	snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc",
  		 le16_to_cpu(params->dev_revid));

  	kfree_skb(skb);
  
  	if (fw->size < 644) {
  		BT_ERR("%s: Invalid size of firmware file (%zu)",
  		       hdev->name, fw->size);
  		err = -EBADF;
  		goto done;
  	}
  
  	set_bit(BTUSB_DOWNLOADING, &data->flags);
  
  	/* Start the firmware download transaction with the Init fragment
  	 * represented by the 128 bytes of CSS header.
  	 */

  	err = btintel_secure_send(hdev, 0x00, 128, fw->data);

  	if (err < 0) {
  		BT_ERR("%s: Failed to send firmware header (%d)",
  		       hdev->name, err);
  		goto done;
  	}
  
  	/* Send the 256 bytes of public key information from the firmware
  	 * as the PKey fragment.
  	 */

  	err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);

  	if (err < 0) {
  		BT_ERR("%s: Failed to send firmware public key (%d)",
  		       hdev->name, err);
  		goto done;
  	}
  
  	/* Send the 256 bytes of signature information from the firmware
  	 * as the Sign fragment.
  	 */

  	err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);

  	if (err < 0) {
  		BT_ERR("%s: Failed to send firmware signature (%d)",
  		       hdev->name, err);
  		goto done;
  	}
  
  	fw_ptr = fw->data + 644;

  	frag_len = 0;

  
  	while (fw_ptr - fw->data < fw->size) {

  		struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);

  		frag_len += sizeof(*cmd) + cmd->plen;

  		/* The parameter length of the secure send command requires

  		 * a 4 byte alignment. It happens so that the firmware file
  		 * contains proper Intel_NOP commands to align the fragments
  		 * as needed.
  		 *
  		 * Send set of commands with 4 byte alignment from the
  		 * firmware data buffer as a single Data fragement.

  		 */

  		if (!(frag_len % 4)) {

  			err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);

  			if (err < 0) {
  				BT_ERR("%s: Failed to send firmware data (%d)",
  				       hdev->name, err);
  				goto done;
  			}

  			fw_ptr += frag_len;
  			frag_len = 0;
  		}

  	}

  	set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);

  	BT_INFO("%s: Waiting for firmware download to complete", hdev->name);

  	/* Before switching the device into operational mode and with that
  	 * booting the loaded firmware, wait for the bootloader notification
  	 * that all fragments have been successfully received.
  	 *