drivers/bluetooth/bpa10x.c - kernel/msm-4.9 - Gitiles

 /*
  *
  *  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>

 #include "hci_uart.h"

 #define VERSION "0.11"

 static const 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];
 };

 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);
 }

 #define HCI_VENDOR_HDR_SIZE 5

 #define HCI_RECV_VENDOR \
 	.type = HCI_VENDOR_PKT, \
 	.hlen = HCI_VENDOR_HDR_SIZE, \
 	.loff = 3, \
 	.lsize = 2, \
 	.maxlen = HCI_MAX_FRAME_SIZE

 static const struct h4_recv_pkt bpa10x_recv_pkts[] = {
 	{ H4_RECV_ACL,     .recv = hci_recv_frame },
 	{ H4_RECV_SCO,     .recv = hci_recv_frame },
 	{ H4_RECV_EVENT,   .recv = hci_recv_frame },
 	{ HCI_RECV_VENDOR, .recv = hci_recv_diag  },
 };

 static void bpa10x_rx_complete(struct urb *urb)
 {
 	struct hci_dev *hdev = urb->context;
 	struct bpa10x_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) {
 		bool idx = usb_pipebulk(urb->pipe);

 		data->rx_skb[idx] = h4_recv_buf(hdev, data->rx_skb[idx],
 						urb->transfer_buffer,
 						urb->actual_length,
 						bpa10x_recv_pkts,
 						ARRAY_SIZE(bpa10x_recv_pkts));
 		if (IS_ERR(data->rx_skb[idx])) {
 			BT_ERR("%s corrupted event packet", hdev->name);
 			hdev->stat.err_rx++;
 			data->rx_skb[idx] = NULL;
 		}
 	}

 	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 = hci_get_drvdata(hdev);
 	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 = hci_get_drvdata(hdev);
 	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 = hci_get_drvdata(hdev);
 	int err;

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

 	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);

 	return err;
 }

 static int bpa10x_close(struct hci_dev *hdev)
 {
 	struct bpa10x_data *data = hci_get_drvdata(hdev);

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

 	usb_kill_anchored_urbs(&data->rx_anchor);

 	return 0;
 }

 static int bpa10x_flush(struct hci_dev *hdev)
 {
 	struct bpa10x_data *data = hci_get_drvdata(hdev);

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

 	usb_kill_anchored_urbs(&data->tx_anchor);

 	return 0;
 }

 static int bpa10x_setup(struct hci_dev *hdev)
 {
 	const u8 req[] = { 0x07 };
 	struct sk_buff *skb;

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

 	/* Read revision string */
 	skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);

 	BT_INFO("%s: %s", hdev->name, (char *)(skb->data + 1));

 	hci_set_fw_info(hdev, "%s", skb->data + 1);

 	kfree_skb(skb);
 	return 0;
 }

 static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	struct bpa10x_data *data = hci_get_drvdata(hdev);
 	struct usb_ctrlrequest *dr;
 	struct urb *urb;
 	unsigned int pipe;
 	int err;

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

 	skb->dev = (void *) hdev;

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

 	/* Prepend skb with frame type */
 	*skb_push(skb, 1) = hci_skb_pkt_type(skb);

 	switch (hci_skb_pkt_type(skb)) {
 	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_set_diag(struct hci_dev *hdev, bool enable)
 {
 	const u8 req[] = { 0x00, enable };
 	struct sk_buff *skb;

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

 	if (!test_bit(HCI_RUNNING, &hdev->flags))
 		return -ENETDOWN;

 	/* Enable sniffer operation */
 	skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);

 	kfree_skb(skb);
 	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 = devm_kzalloc(&intf->dev, 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)
 		return -ENOMEM;

 	hdev->bus = HCI_USB;
 	hci_set_drvdata(hdev, data);

 	data->hdev = hdev;

 	SET_HCIDEV_DEV(hdev, &intf->dev);

 	hdev->open     = bpa10x_open;
 	hdev->close    = bpa10x_close;
 	hdev->flush    = bpa10x_flush;
 	hdev->setup    = bpa10x_setup;
 	hdev->send     = bpa10x_send_frame;
 	hdev->set_diag = bpa10x_set_diag;

 	set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);

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

 static struct usb_driver bpa10x_driver = {
 	.name		= "bpa10x",
 	.probe		= bpa10x_probe,
 	.disconnect	= bpa10x_disconnect,
 	.id_table	= bpa10x_table,
 	.disable_hub_initiated_lpm = 1,
 };

 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>

	#include "hci_uart.h"

	#define VERSION "0.11"

	static const 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];
	};

	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);
	}

	#define HCI_VENDOR_HDR_SIZE 5

	#define HCI_RECV_VENDOR \
	.type = HCI_VENDOR_PKT, \
	.hlen = HCI_VENDOR_HDR_SIZE, \
	.loff = 3, \
	.lsize = 2, \
	.maxlen = HCI_MAX_FRAME_SIZE

	static const struct h4_recv_pkt bpa10x_recv_pkts[] = {
	{ H4_RECV_ACL, .recv = hci_recv_frame },
	{ H4_RECV_SCO, .recv = hci_recv_frame },
	{ H4_RECV_EVENT, .recv = hci_recv_frame },
	{ HCI_RECV_VENDOR, .recv = hci_recv_diag },
	};

	static void bpa10x_rx_complete(struct urb *urb)
	{
	struct hci_dev *hdev = urb->context;
	struct bpa10x_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) {
	bool idx = usb_pipebulk(urb->pipe);

	data->rx_skb[idx] = h4_recv_buf(hdev, data->rx_skb[idx],
	urb->transfer_buffer,
	urb->actual_length,
	bpa10x_recv_pkts,
	ARRAY_SIZE(bpa10x_recv_pkts));
	if (IS_ERR(data->rx_skb[idx])) {
	BT_ERR("%s corrupted event packet", hdev->name);
	hdev->stat.err_rx++;
	data->rx_skb[idx] = NULL;
	}
	}

	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 = hci_get_drvdata(hdev);
	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 = hci_get_drvdata(hdev);
	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 = hci_get_drvdata(hdev);
	int err;

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

	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);

	return err;
	}

	static int bpa10x_close(struct hci_dev *hdev)
	{
	struct bpa10x_data *data = hci_get_drvdata(hdev);

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

	usb_kill_anchored_urbs(&data->rx_anchor);

	return 0;
	}

	static int bpa10x_flush(struct hci_dev *hdev)
	{
	struct bpa10x_data *data = hci_get_drvdata(hdev);

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

	usb_kill_anchored_urbs(&data->tx_anchor);

	return 0;
	}

	static int bpa10x_setup(struct hci_dev *hdev)
	{
	const u8 req[] = { 0x07 };
	struct sk_buff *skb;

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

	/* Read revision string */
	skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

	BT_INFO("%s: %s", hdev->name, (char *)(skb->data + 1));

	hci_set_fw_info(hdev, "%s", skb->data + 1);

	kfree_skb(skb);
	return 0;
	}

	static int bpa10x_send_frame(struct hci_dev hdev, struct sk_buff skb)
	{
	struct bpa10x_data *data = hci_get_drvdata(hdev);
	struct usb_ctrlrequest *dr;
	struct urb *urb;
	unsigned int pipe;
	int err;

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

	skb->dev = (void *) hdev;

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

	/* Prepend skb with frame type */
	*skb_push(skb, 1) = hci_skb_pkt_type(skb);

	switch (hci_skb_pkt_type(skb)) {
	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_set_diag(struct hci_dev *hdev, bool enable)
	{
	const u8 req[] = { 0x00, enable };
	struct sk_buff *skb;

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

	if (!test_bit(HCI_RUNNING, &hdev->flags))
	return -ENETDOWN;

	/* Enable sniffer operation */
	skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

	kfree_skb(skb);
	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 = devm_kzalloc(&intf->dev, 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)
	return -ENOMEM;

	hdev->bus = HCI_USB;
	hci_set_drvdata(hdev, data);

	data->hdev = hdev;

	SET_HCIDEV_DEV(hdev, &intf->dev);

	hdev->open = bpa10x_open;
	hdev->close = bpa10x_close;
	hdev->flush = bpa10x_flush;
	hdev->setup = bpa10x_setup;
	hdev->send = bpa10x_send_frame;
	hdev->set_diag = bpa10x_set_diag;

	set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);

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

	static struct usb_driver bpa10x_driver = {
	.name = "bpa10x",
	.probe = bpa10x_probe,
	.disconnect = bpa10x_disconnect,
	.id_table = bpa10x_table,
	.disable_hub_initiated_lpm = 1,
	};

	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");