Initial import

1 files changed, 514 insertions, 0 deletions

diff --git a/drivers/bluetooth/bpa10x.c b/drivers/bluetooth/bpa10x.c
new file mode 100644
index 000000000..8a319913c
--- /dev/null
+++ b/drivers/bluetooth/bpa10x.c
@@ -0,0 +1,514 @@
+/*
+ *
+ *  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 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];
+};
+
+#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 = hci_get_drvdata(hdev);
+
+	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;
+			}
+
+			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(hdev, 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 = 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) {
+		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 = 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);
+
+	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 = hci_get_drvdata(hdev);
+
+	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 = hci_get_drvdata(hdev);
+
+	BT_DBG("%s", hdev->name);
+
+	usb_kill_anchored_urbs(&data->tx_anchor);
+
+	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);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return -EBUSY;
+
+	skb->dev = (void *) hdev;
+
+	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 = 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->send     = bpa10x_send_frame;
+
+	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");