drivers/bluetooth/bpa10x.c - linux - Git at Google

 /*
  *
  *  Digianswer Bluetooth USB driver
  *
  *  Copyright (C) 2004-2007  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/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/sched.h>
 #include <linux/errno.h>
 #include <linux/skbuff.h>

 #include <linux/usb.h>

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

 #define VERSION "0.10"

 static struct usb_device_id bpa10x_table[] = {
 	/* Tektronix BPA 100/105 (Digianswer) */
 	{ USB_DEVICE(0x08fd, 0x0002) },

 	{ }	/* Terminating entry */
 };

 MODULE_DEVICE_TABLE(usb, bpa10x_table);

 struct bpa10x_data {
 	struct hci_dev    *hdev;
 	struct usb_device *udev;

 	struct usb_anchor tx_anchor;
 	struct usb_anchor rx_anchor;

 	struct sk_buff *rx_skb[2];
 };

 #define HCI_VENDOR_HDR_SIZE 5

 struct hci_vendor_hdr {
 	__u8    type;
 	__le16  snum;
 	__le16  dlen;
 } __packed;

 static int bpa10x_recv(struct hci_dev *hdev, int queue, void *buf, int count)
 {
 	struct bpa10x_data *data = hdev->driver_data;

 	BT_DBG("%s queue %d buffer %p count %d", hdev->name,
 							queue, buf, count);

 	if (queue < 0 || queue > 1)
 		return -EILSEQ;

 	hdev->stat.byte_rx += count;

 	while (count) {
 		struct sk_buff *skb = data->rx_skb[queue];
 		struct { __u8 type; int expect; } *scb;
 		int type, len = 0;

 		if (!skb) {
 			/* Start of the frame */

 			type = *((__u8 *) buf);
 			count--; buf++;

 			switch (type) {
 			case HCI_EVENT_PKT:
 				if (count >= HCI_EVENT_HDR_SIZE) {
 					struct hci_event_hdr *h = buf;
 					len = HCI_EVENT_HDR_SIZE + h->plen;
 				} else
 					return -EILSEQ;
 				break;

 			case HCI_ACLDATA_PKT:
 				if (count >= HCI_ACL_HDR_SIZE) {
 					struct hci_acl_hdr *h = buf;
 					len = HCI_ACL_HDR_SIZE +
 							__le16_to_cpu(h->dlen);
 				} else
 					return -EILSEQ;
 				break;

 			case HCI_SCODATA_PKT:
 				if (count >= HCI_SCO_HDR_SIZE) {
 					struct hci_sco_hdr *h = buf;
 					len = HCI_SCO_HDR_SIZE + h->dlen;
 				} else
 					return -EILSEQ;
 				break;

 			case HCI_VENDOR_PKT:
 				if (count >= HCI_VENDOR_HDR_SIZE) {
 					struct hci_vendor_hdr *h = buf;
 					len = HCI_VENDOR_HDR_SIZE +
 							__le16_to_cpu(h->dlen);
 				} else
 					return -EILSEQ;
 				break;
 			}

 			skb = bt_skb_alloc(len, GFP_ATOMIC);
 			if (!skb) {
 				BT_ERR("%s no memory for packet", hdev->name);
 				return -ENOMEM;
 			}

 			skb->dev = (void *) hdev;

 			data->rx_skb[queue] = skb;

 			scb = (void *) skb->cb;
 			scb->type = type;
 			scb->expect = len;
 		} else {
 			/* Continuation */

 			scb = (void *) skb->cb;
 			len = scb->expect;
 		}

 		len = min(len, count);

 		memcpy(skb_put(skb, len), buf, len);

 		scb->expect -= len;

 		if (scb->expect == 0) {
 			/* Complete frame */

 			data->rx_skb[queue] = NULL;

 			bt_cb(skb)->pkt_type = scb->type;
 			hci_recv_frame(skb);
 		}

 		count -= len; buf += len;
 	}

 	return 0;
 }

 static void bpa10x_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 void bpa10x_rx_complete(struct urb *urb)
 {
 	struct hci_dev *hdev = urb->context;
 	struct bpa10x_data *data = hdev->driver_data;
 	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) {
 		if (bpa10x_recv(hdev, usb_pipebulk(urb->pipe),
 						urb->transfer_buffer,
 						urb->actual_length) < 0) {
 			BT_ERR("%s corrupted event packet", hdev->name);
 			hdev->stat.err_rx++;
 		}
 	}

 	usb_anchor_urb(urb, &data->rx_anchor);

 	err = usb_submit_urb(urb, GFP_ATOMIC);
 	if (err < 0) {
 		BT_ERR("%s urb %p failed to resubmit (%d)",
 						hdev->name, urb, -err);
 		usb_unanchor_urb(urb);
 	}
 }

 static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
 {
 	struct bpa10x_data *data = hdev->driver_data;
 	struct urb *urb;
 	unsigned char *buf;
 	unsigned int pipe;
 	int err, size = 16;

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

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

 	buf = kmalloc(size, GFP_KERNEL);
 	if (!buf) {
 		usb_free_urb(urb);
 		return -ENOMEM;
 	}

 	pipe = usb_rcvintpipe(data->udev, 0x81);

 	usb_fill_int_urb(urb, data->udev, pipe, buf, size,
 						bpa10x_rx_complete, hdev, 1);

 	urb->transfer_flags |= URB_FREE_BUFFER;

 	usb_anchor_urb(urb, &data->rx_anchor);

 	err = usb_submit_urb(urb, GFP_KERNEL);
 	if (err < 0) {
 		BT_ERR("%s urb %p submission failed (%d)",
 						hdev->name, urb, -err);
 		usb_unanchor_urb(urb);
 	}

 	usb_free_urb(urb);

 	return err;
 }

 static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
 {
 	struct bpa10x_data *data = hdev->driver_data;
 	struct urb *urb;
 	unsigned char *buf;
 	unsigned int pipe;
 	int err, size = 64;

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

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

 	buf = kmalloc(size, GFP_KERNEL);
 	if (!buf) {
 		usb_free_urb(urb);
 		return -ENOMEM;
 	}

 	pipe = usb_rcvbulkpipe(data->udev, 0x82);

 	usb_fill_bulk_urb(urb, data->udev, pipe,
 					buf, size, bpa10x_rx_complete, hdev);

 	urb->transfer_flags |= URB_FREE_BUFFER;

 	usb_anchor_urb(urb, &data->rx_anchor);

 	err = usb_submit_urb(urb, GFP_KERNEL);
 	if (err < 0) {
 		BT_ERR("%s urb %p submission failed (%d)",
 						hdev->name, urb, -err);
 		usb_unanchor_urb(urb);
 	}

 	usb_free_urb(urb);

 	return err;
 }

 static int bpa10x_open(struct hci_dev *hdev)
 {
 	struct bpa10x_data *data = hdev->driver_data;
 	int err;

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

 	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 		return 0;

 	err = bpa10x_submit_intr_urb(hdev);
 	if (err < 0)
 		goto error;

 	err = bpa10x_submit_bulk_urb(hdev);
 	if (err < 0)
 		goto error;

 	return 0;

 error:
 	usb_kill_anchored_urbs(&data->rx_anchor);

 	clear_bit(HCI_RUNNING, &hdev->flags);

 	return err;
 }

 static int bpa10x_close(struct hci_dev *hdev)
 {
 	struct bpa10x_data *data = hdev->driver_data;

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

 	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 		return 0;

 	usb_kill_anchored_urbs(&data->rx_anchor);

 	return 0;
 }

 static int bpa10x_flush(struct hci_dev *hdev)
 {
 	struct bpa10x_data *data = hdev->driver_data;

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

 	usb_kill_anchored_urbs(&data->tx_anchor);

 	return 0;
 }

 static int bpa10x_send_frame(struct sk_buff *skb)
 {
 	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 	struct bpa10x_data *data = hdev->driver_data;
 	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;

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

 	/* Prepend skb with frame type */
 	*skb_push(skb, 1) = bt_cb(skb)->pkt_type;

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

 		dr->bRequestType = USB_TYPE_VENDOR;
 		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, bpa10x_tx_complete, skb);

 		hdev->stat.cmd_tx++;
 		break;

 	case HCI_ACLDATA_PKT:
 		pipe = usb_sndbulkpipe(data->udev, 0x02);

 		usb_fill_bulk_urb(urb, data->udev, pipe,
 				skb->data, skb->len, bpa10x_tx_complete, skb);

 		hdev->stat.acl_tx++;
 		break;

 	case HCI_SCODATA_PKT:
 		pipe = usb_sndbulkpipe(data->udev, 0x02);

 		usb_fill_bulk_urb(urb, data->udev, pipe,
 				skb->data, skb->len, bpa10x_tx_complete, skb);

 		hdev->stat.sco_tx++;
 		break;

 	default:
 		usb_free_urb(urb);
 		return -EILSEQ;
 	}

 	usb_anchor_urb(urb, &data->tx_anchor);

 	err = usb_submit_urb(urb, GFP_ATOMIC);
 	if (err < 0) {
 		BT_ERR("%s urb %p submission failed", hdev->name, urb);
 		kfree(urb->setup_packet);
 		usb_unanchor_urb(urb);
 	}

 	usb_free_urb(urb);

 	return 0;
 }

 static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
 {
 	struct bpa10x_data *data;
 	struct hci_dev *hdev;
 	int err;

 	BT_DBG("intf %p id %p", intf, id);

 	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 		return -ENODEV;

 	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;

 	data->udev = interface_to_usbdev(intf);

 	init_usb_anchor(&data->tx_anchor);
 	init_usb_anchor(&data->rx_anchor);

 	hdev = hci_alloc_dev();
 	if (!hdev) {
 		kfree(data);
 		return -ENOMEM;
 	}

 	hdev->bus = HCI_USB;
 	hdev->driver_data = data;

 	data->hdev = hdev;

 	SET_HCIDEV_DEV(hdev, &intf->dev);

 	hdev->open     = bpa10x_open;
 	hdev->close    = bpa10x_close;
 	hdev->flush    = bpa10x_flush;
 	hdev->send     = bpa10x_send_frame;

 	set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);

 	err = hci_register_dev(hdev);
 	if (err < 0) {
 		hci_free_dev(hdev);
 		kfree(data);
 		return err;
 	}

 	usb_set_intfdata(intf, data);

 	return 0;
 }

 static void bpa10x_disconnect(struct usb_interface *intf)
 {
 	struct bpa10x_data *data = usb_get_intfdata(intf);

 	BT_DBG("intf %p", intf);

 	if (!data)
 		return;

 	usb_set_intfdata(intf, NULL);

 	hci_unregister_dev(data->hdev);

 	hci_free_dev(data->hdev);
 	kfree_skb(data->rx_skb[0]);
 	kfree_skb(data->rx_skb[1]);
 	kfree(data);
 }

 static struct usb_driver bpa10x_driver = {
 	.name		= "bpa10x",
 	.probe		= bpa10x_probe,
 	.disconnect	= bpa10x_disconnect,
 	.id_table	= bpa10x_table,
 };

 module_usb_driver(bpa10x_driver);

 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
 MODULE_VERSION(VERSION);
 MODULE_LICENSE("GPL");
	/*
	*
	* Digianswer Bluetooth USB driver
	*
	* Copyright (C) 2004-2007 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/kernel.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/slab.h>
	#include <linux/types.h>
	#include <linux/sched.h>
	#include <linux/errno.h>
	#include <linux/skbuff.h>

	#include <linux/usb.h>

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

	#define VERSION "0.10"

	static struct usb_device_id bpa10x_table[] = {
	/* Tektronix BPA 100/105 (Digianswer) */
	{ USB_DEVICE(0x08fd, 0x0002) },

	{ } /* Terminating entry */
	};

	MODULE_DEVICE_TABLE(usb, bpa10x_table);

	struct bpa10x_data {
	struct hci_dev *hdev;
	struct usb_device *udev;

	struct usb_anchor tx_anchor;
	struct usb_anchor rx_anchor;

	struct sk_buff *rx_skb[2];
	};

	#define HCI_VENDOR_HDR_SIZE 5

	struct hci_vendor_hdr {
	__u8 type;
	__le16 snum;
	__le16 dlen;
	} __packed;

	static int bpa10x_recv(struct hci_dev hdev, int queue, void buf, int count)
	{
	struct bpa10x_data *data = hdev->driver_data;

	BT_DBG("%s queue %d buffer %p count %d", hdev->name,
	queue, buf, count);

	if (queue < 0 \|\| queue > 1)
	return -EILSEQ;

	hdev->stat.byte_rx += count;

	while (count) {
	struct sk_buff *skb = data->rx_skb[queue];
	struct { __u8 type; int expect; } *scb;
	int type, len = 0;

	if (!skb) {
	/* Start of the frame */

	type = ((__u8 ) buf);
	count--; buf++;

	switch (type) {
	case HCI_EVENT_PKT:
	if (count >= HCI_EVENT_HDR_SIZE) {
	struct hci_event_hdr *h = buf;
	len = HCI_EVENT_HDR_SIZE + h->plen;
	} else
	return -EILSEQ;
	break;

	case HCI_ACLDATA_PKT:
	if (count >= HCI_ACL_HDR_SIZE) {
	struct hci_acl_hdr *h = buf;
	len = HCI_ACL_HDR_SIZE +
	__le16_to_cpu(h->dlen);
	} else
	return -EILSEQ;
	break;

	case HCI_SCODATA_PKT:
	if (count >= HCI_SCO_HDR_SIZE) {
	struct hci_sco_hdr *h = buf;
	len = HCI_SCO_HDR_SIZE + h->dlen;
	} else
	return -EILSEQ;
	break;

	case HCI_VENDOR_PKT:
	if (count >= HCI_VENDOR_HDR_SIZE) {
	struct hci_vendor_hdr *h = buf;
	len = HCI_VENDOR_HDR_SIZE +
	__le16_to_cpu(h->dlen);
	} else
	return -EILSEQ;
	break;
	}

	skb = bt_skb_alloc(len, GFP_ATOMIC);
	if (!skb) {
	BT_ERR("%s no memory for packet", hdev->name);
	return -ENOMEM;
	}

	skb->dev = (void *) hdev;

	data->rx_skb[queue] = skb;

	scb = (void *) skb->cb;
	scb->type = type;
	scb->expect = len;
	} else {
	/* Continuation */

	scb = (void *) skb->cb;
	len = scb->expect;
	}

	len = min(len, count);

	memcpy(skb_put(skb, len), buf, len);

	scb->expect -= len;

	if (scb->expect == 0) {
	/* Complete frame */

	data->rx_skb[queue] = NULL;

	bt_cb(skb)->pkt_type = scb->type;
	hci_recv_frame(skb);
	}

	count -= len; buf += len;
	}

	return 0;
	}

	static void bpa10x_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 void bpa10x_rx_complete(struct urb *urb)
	{
	struct hci_dev *hdev = urb->context;
	struct bpa10x_data *data = hdev->driver_data;
	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) {
	if (bpa10x_recv(hdev, usb_pipebulk(urb->pipe),
	urb->transfer_buffer,
	urb->actual_length) < 0) {
	BT_ERR("%s corrupted event packet", hdev->name);
	hdev->stat.err_rx++;
	}
	}

	usb_anchor_urb(urb, &data->rx_anchor);

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err < 0) {
	BT_ERR("%s urb %p failed to resubmit (%d)",
	hdev->name, urb, -err);
	usb_unanchor_urb(urb);
	}
	}

	static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
	{
	struct bpa10x_data *data = hdev->driver_data;
	struct urb *urb;
	unsigned char *buf;
	unsigned int pipe;
	int err, size = 16;

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

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

	buf = kmalloc(size, GFP_KERNEL);
	if (!buf) {
	usb_free_urb(urb);
	return -ENOMEM;
	}

	pipe = usb_rcvintpipe(data->udev, 0x81);

	usb_fill_int_urb(urb, data->udev, pipe, buf, size,
	bpa10x_rx_complete, hdev, 1);

	urb->transfer_flags \|= URB_FREE_BUFFER;

	usb_anchor_urb(urb, &data->rx_anchor);

	err = usb_submit_urb(urb, GFP_KERNEL);
	if (err < 0) {
	BT_ERR("%s urb %p submission failed (%d)",
	hdev->name, urb, -err);
	usb_unanchor_urb(urb);
	}

	usb_free_urb(urb);

	return err;
	}

	static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
	{
	struct bpa10x_data *data = hdev->driver_data;
	struct urb *urb;
	unsigned char *buf;
	unsigned int pipe;
	int err, size = 64;

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

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

	buf = kmalloc(size, GFP_KERNEL);
	if (!buf) {
	usb_free_urb(urb);
	return -ENOMEM;
	}

	pipe = usb_rcvbulkpipe(data->udev, 0x82);

	usb_fill_bulk_urb(urb, data->udev, pipe,
	buf, size, bpa10x_rx_complete, hdev);

	urb->transfer_flags \|= URB_FREE_BUFFER;

	usb_anchor_urb(urb, &data->rx_anchor);

	err = usb_submit_urb(urb, GFP_KERNEL);
	if (err < 0) {
	BT_ERR("%s urb %p submission failed (%d)",
	hdev->name, urb, -err);
	usb_unanchor_urb(urb);
	}

	usb_free_urb(urb);

	return err;
	}

	static int bpa10x_open(struct hci_dev *hdev)
	{
	struct bpa10x_data *data = hdev->driver_data;
	int err;

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

	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
	return 0;

	err = bpa10x_submit_intr_urb(hdev);
	if (err < 0)
	goto error;

	err = bpa10x_submit_bulk_urb(hdev);
	if (err < 0)
	goto error;

	return 0;

	error:
	usb_kill_anchored_urbs(&data->rx_anchor);

	clear_bit(HCI_RUNNING, &hdev->flags);

	return err;
	}

	static int bpa10x_close(struct hci_dev *hdev)
	{
	struct bpa10x_data *data = hdev->driver_data;

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

	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
	return 0;

	usb_kill_anchored_urbs(&data->rx_anchor);

	return 0;
	}

	static int bpa10x_flush(struct hci_dev *hdev)
	{
	struct bpa10x_data *data = hdev->driver_data;

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

	usb_kill_anchored_urbs(&data->tx_anchor);

	return 0;
	}

	static int bpa10x_send_frame(struct sk_buff *skb)
	{
	struct hci_dev hdev = (struct hci_dev ) skb->dev;
	struct bpa10x_data *data = hdev->driver_data;
	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;

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

	/* Prepend skb with frame type */
	*skb_push(skb, 1) = bt_cb(skb)->pkt_type;

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

	dr->bRequestType = USB_TYPE_VENDOR;
	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, bpa10x_tx_complete, skb);

	hdev->stat.cmd_tx++;
	break;

	case HCI_ACLDATA_PKT:
	pipe = usb_sndbulkpipe(data->udev, 0x02);

	usb_fill_bulk_urb(urb, data->udev, pipe,
	skb->data, skb->len, bpa10x_tx_complete, skb);

	hdev->stat.acl_tx++;
	break;

	case HCI_SCODATA_PKT:
	pipe = usb_sndbulkpipe(data->udev, 0x02);

	usb_fill_bulk_urb(urb, data->udev, pipe,
	skb->data, skb->len, bpa10x_tx_complete, skb);

	hdev->stat.sco_tx++;
	break;

	default:
	usb_free_urb(urb);
	return -EILSEQ;
	}

	usb_anchor_urb(urb, &data->tx_anchor);

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err < 0) {
	BT_ERR("%s urb %p submission failed", hdev->name, urb);
	kfree(urb->setup_packet);
	usb_unanchor_urb(urb);
	}

	usb_free_urb(urb);

	return 0;
	}

	static int bpa10x_probe(struct usb_interface intf, const struct usb_device_id id)
	{
	struct bpa10x_data *data;
	struct hci_dev *hdev;
	int err;

	BT_DBG("intf %p id %p", intf, id);

	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
	return -ENODEV;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
	return -ENOMEM;

	data->udev = interface_to_usbdev(intf);

	init_usb_anchor(&data->tx_anchor);
	init_usb_anchor(&data->rx_anchor);

	hdev = hci_alloc_dev();
	if (!hdev) {
	kfree(data);
	return -ENOMEM;
	}

	hdev->bus = HCI_USB;
	hdev->driver_data = data;

	data->hdev = hdev;

	SET_HCIDEV_DEV(hdev, &intf->dev);

	hdev->open = bpa10x_open;
	hdev->close = bpa10x_close;
	hdev->flush = bpa10x_flush;
	hdev->send = bpa10x_send_frame;

	set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);

	err = hci_register_dev(hdev);
	if (err < 0) {
	hci_free_dev(hdev);
	kfree(data);
	return err;
	}

	usb_set_intfdata(intf, data);

	return 0;
	}

	static void bpa10x_disconnect(struct usb_interface *intf)
	{
	struct bpa10x_data *data = usb_get_intfdata(intf);

	BT_DBG("intf %p", intf);

	if (!data)
	return;

	usb_set_intfdata(intf, NULL);

	hci_unregister_dev(data->hdev);

	hci_free_dev(data->hdev);
	kfree_skb(data->rx_skb[0]);
	kfree_skb(data->rx_skb[1]);
	kfree(data);
	}

	static struct usb_driver bpa10x_driver = {
	.name = "bpa10x",
	.probe = bpa10x_probe,
	.disconnect = bpa10x_disconnect,
	.id_table = bpa10x_table,
	};

	module_usb_driver(bpa10x_driver);

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