1 files changed, 657 insertions, 0 deletions

diff --git a/drivers/bluetooth/bpa10x.c b/drivers/bluetooth/bpa10x.c
new file mode 100644
index 0000000..2771c86
--- /dev/null
+++ b/drivers/bluetooth/bpa10x.c
@@ -0,0 +1,657 @@
+/*
+ *
+ *  Digianswer Bluetooth USB driver
+ *
+ *  Copyright (C) 2004-2005  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/config.h>
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+
+#include <linux/usb.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#ifndef CONFIG_BT_HCIBPA10X_DEBUG
+#undef  BT_DBG
+#define BT_DBG(D...)
+#endif
+
+#define VERSION "0.8"
+
+static int ignore = 0;
+
+static struct usb_device_id bpa10x_table[] = {
+	/* Tektronix BPA 100/105 (Digianswer) */
+	{ USB_DEVICE(0x08fd, 0x0002) },
+
+	{ }	/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, bpa10x_table);
+
+#define BPA10X_CMD_EP		0x00
+#define BPA10X_EVT_EP		0x81
+#define BPA10X_TX_EP		0x02
+#define BPA10X_RX_EP		0x82
+
+#define BPA10X_CMD_BUF_SIZE	252
+#define BPA10X_EVT_BUF_SIZE	16
+#define BPA10X_TX_BUF_SIZE	384
+#define BPA10X_RX_BUF_SIZE	384
+
+struct bpa10x_data {
+	struct hci_dev		*hdev;
+	struct usb_device	*udev;
+
+	rwlock_t		lock;
+
+	struct sk_buff_head	cmd_queue;
+	struct urb		*cmd_urb;
+	struct urb		*evt_urb;
+	struct sk_buff		*evt_skb;
+	unsigned int		evt_len;
+
+	struct sk_buff_head	tx_queue;
+	struct urb		*tx_urb;
+	struct urb		*rx_urb;
+};
+
+#define HCI_VENDOR_HDR_SIZE	5
+
+struct hci_vendor_hdr {
+	__u8	type;
+	__u16	snum;
+	__u16	dlen;
+} __attribute__ ((packed));
+
+static void bpa10x_recv_bulk(struct bpa10x_data *data, unsigned char *buf, int count)
+{
+	struct hci_acl_hdr *ah;
+	struct hci_sco_hdr *sh;
+	struct hci_vendor_hdr *vh;
+	struct sk_buff *skb;
+	int len;
+
+	while (count) {
+		switch (*buf++) {
+		case HCI_ACLDATA_PKT:
+			ah = (struct hci_acl_hdr *) buf;
+			len = HCI_ACL_HDR_SIZE + __le16_to_cpu(ah->dlen);
+			skb = bt_skb_alloc(len, GFP_ATOMIC);
+			if (skb) {
+				memcpy(skb_put(skb, len), buf, len);
+				skb->dev = (void *) data->hdev;
+				skb->pkt_type = HCI_ACLDATA_PKT;
+				hci_recv_frame(skb);
+			}
+			break;
+
+		case HCI_SCODATA_PKT:
+			sh = (struct hci_sco_hdr *) buf;
+			len = HCI_SCO_HDR_SIZE + sh->dlen;
+			skb = bt_skb_alloc(len, GFP_ATOMIC);
+			if (skb) {
+				memcpy(skb_put(skb, len), buf, len);
+				skb->dev = (void *) data->hdev;
+				skb->pkt_type = HCI_SCODATA_PKT;
+				hci_recv_frame(skb);
+			}
+			break;
+
+		case HCI_VENDOR_PKT:
+			vh = (struct hci_vendor_hdr *) buf;
+			len = HCI_VENDOR_HDR_SIZE + __le16_to_cpu(vh->dlen);
+			skb = bt_skb_alloc(len, GFP_ATOMIC);
+			if (skb) {
+				memcpy(skb_put(skb, len), buf, len);
+				skb->dev = (void *) data->hdev;
+				skb->pkt_type = HCI_VENDOR_PKT;
+				hci_recv_frame(skb);
+			}
+			break;
+
+		default:
+			len = count - 1;
+			break;
+		}
+
+		buf   += len;
+		count -= (len + 1);
+	}
+}
+
+static int bpa10x_recv_event(struct bpa10x_data *data, unsigned char *buf, int size)
+{
+	BT_DBG("data %p buf %p size %d", data, buf, size);
+
+	if (data->evt_skb) {
+		struct sk_buff *skb = data->evt_skb;
+
+		memcpy(skb_put(skb, size), buf, size);
+
+		if (skb->len == data->evt_len) {
+			data->evt_skb = NULL;
+			data->evt_len = 0;
+			hci_recv_frame(skb);
+		}
+	} else {
+		struct sk_buff *skb;
+		struct hci_event_hdr *hdr;
+		unsigned char pkt_type;
+		int pkt_len = 0;
+
+		if (size < HCI_EVENT_HDR_SIZE + 1) {
+			BT_ERR("%s event packet block with size %d is too short",
+							data->hdev->name, size);
+			return -EILSEQ;
+		}
+
+		pkt_type = *buf++;
+		size--;
+
+		if (pkt_type != HCI_EVENT_PKT) {
+			BT_ERR("%s unexpected event packet start byte 0x%02x",
+							data->hdev->name, pkt_type);
+			return -EPROTO;
+		}
+
+		hdr = (struct hci_event_hdr *) buf;
+		pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen;
+
+		skb = bt_skb_alloc(pkt_len, GFP_ATOMIC);
+		if (!skb) {
+			BT_ERR("%s no memory for new event packet",
+							data->hdev->name);
+			return -ENOMEM;
+		}
+
+		skb->dev = (void *) data->hdev;
+		skb->pkt_type = pkt_type;
+
+		memcpy(skb_put(skb, size), buf, size);
+
+		if (pkt_len == size) {
+			hci_recv_frame(skb);
+		} else {
+			data->evt_skb = skb;
+			data->evt_len = pkt_len;
+		}
+	}
+
+	return 0;
+}
+
+static void bpa10x_wakeup(struct bpa10x_data *data)
+{
+	struct urb *urb;
+	struct sk_buff *skb;
+	int err;
+
+	BT_DBG("data %p", data);
+
+	urb = data->cmd_urb;
+	if (urb->status == -EINPROGRESS)
+		skb = NULL;
+	else
+		skb = skb_dequeue(&data->cmd_queue);
+
+	if (skb) {
+		struct usb_ctrlrequest *cr;
+
+		if (skb->len > BPA10X_CMD_BUF_SIZE) {
+			BT_ERR("%s command packet with size %d is too big",
+							data->hdev->name, skb->len);
+			kfree_skb(skb);
+			return;
+		}
+
+		cr = (struct usb_ctrlrequest *) urb->setup_packet;
+		cr->wLength = __cpu_to_le16(skb->len);
+
+		memcpy(urb->transfer_buffer, skb->data, skb->len);
+		urb->transfer_buffer_length = skb->len;
+
+		err = usb_submit_urb(urb, GFP_ATOMIC);
+		if (err < 0 && err != -ENODEV) {
+			BT_ERR("%s submit failed for command urb %p with error %d",
+							data->hdev->name, urb, err);
+			skb_queue_head(&data->cmd_queue, skb);
+		} else
+			kfree_skb(skb);
+	}
+
+	urb = data->tx_urb;
+	if (urb->status == -EINPROGRESS)
+		skb = NULL;
+	else
+		skb = skb_dequeue(&data->tx_queue);
+
+	if (skb) {
+		memcpy(urb->transfer_buffer, skb->data, skb->len);
+		urb->transfer_buffer_length = skb->len;
+
+		err = usb_submit_urb(urb, GFP_ATOMIC);
+		if (err < 0 && err != -ENODEV) {
+			BT_ERR("%s submit failed for command urb %p with error %d",
+							data->hdev->name, urb, err);
+			skb_queue_head(&data->tx_queue, skb);
+		} else
+			kfree_skb(skb);
+	}
+}
+
+static void bpa10x_complete(struct urb *urb, struct pt_regs *regs)
+{
+	struct bpa10x_data *data = urb->context;
+	unsigned char *buf = urb->transfer_buffer;
+	int err, count = urb->actual_length;
+
+	BT_DBG("data %p urb %p buf %p count %d", data, urb, buf, count);
+
+	read_lock(&data->lock);
+
+	if (!test_bit(HCI_RUNNING, &data->hdev->flags))
+		goto unlock;
+
+	if (urb->status < 0 || !count)
+		goto resubmit;
+
+	if (usb_pipein(urb->pipe)) {
+		data->hdev->stat.byte_rx += count;
+
+		if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)
+			bpa10x_recv_event(data, buf, count);
+
+		if (usb_pipetype(urb->pipe) == PIPE_BULK)
+			bpa10x_recv_bulk(data, buf, count);
+	} else {
+		data->hdev->stat.byte_tx += count;
+
+		bpa10x_wakeup(data);
+	}
+
+resubmit:
+	if (usb_pipein(urb->pipe)) {
+		err = usb_submit_urb(urb, GFP_ATOMIC);
+		if (err < 0 && err != -ENODEV) {
+			BT_ERR("%s urb %p type %d resubmit status %d",
+				data->hdev->name, urb, usb_pipetype(urb->pipe), err);
+		}
+	}
+
+unlock:
+	read_unlock(&data->lock);
+}
+
+static inline struct urb *bpa10x_alloc_urb(struct usb_device *udev, unsigned int pipe, size_t size, int flags, void *data)
+{
+	struct urb *urb;
+	struct usb_ctrlrequest *cr;
+	unsigned char *buf;
+
+	BT_DBG("udev %p data %p", udev, data);
+
+	urb = usb_alloc_urb(0, flags);
+	if (!urb)
+		return NULL;
+
+	buf = kmalloc(size, flags);
+	if (!buf) {
+		usb_free_urb(urb);
+		return NULL;
+	}
+
+	switch (usb_pipetype(pipe)) {
+	case PIPE_CONTROL:
+		cr = kmalloc(sizeof(*cr), flags);
+		if (!cr) {
+			kfree(buf);
+			usb_free_urb(urb);
+			return NULL;
+		}
+
+		cr->bRequestType = USB_TYPE_VENDOR;
+		cr->bRequest     = 0;
+		cr->wIndex       = 0;
+		cr->wValue       = 0;
+		cr->wLength      = __cpu_to_le16(0);
+
+		usb_fill_control_urb(urb, udev, pipe, (void *) cr, buf, 0, bpa10x_complete, data);
+		break;
+
+	case PIPE_INTERRUPT:
+		usb_fill_int_urb(urb, udev, pipe, buf, size, bpa10x_complete, data, 1);
+		break;
+
+	case PIPE_BULK:
+		usb_fill_bulk_urb(urb, udev, pipe, buf, size, bpa10x_complete, data);
+		break;
+
+	default:
+		kfree(buf);
+		usb_free_urb(urb);
+		return NULL;
+	}
+
+	return urb;
+}
+
+static inline void bpa10x_free_urb(struct urb *urb)
+{
+	BT_DBG("urb %p", urb);
+
+	if (!urb)
+		return;
+
+	if (urb->setup_packet)
+		kfree(urb->setup_packet);
+
+	if (urb->transfer_buffer)
+		kfree(urb->transfer_buffer);
+
+	usb_free_urb(urb);
+}
+
+static int bpa10x_open(struct hci_dev *hdev)
+{
+	struct bpa10x_data *data = hdev->driver_data;
+	struct usb_device *udev = data->udev;
+	unsigned long flags;
+	int err;
+
+	BT_DBG("hdev %p data %p", hdev, data);
+
+	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
+		return 0;
+
+	data->cmd_urb = bpa10x_alloc_urb(udev, usb_sndctrlpipe(udev, BPA10X_CMD_EP),
+					BPA10X_CMD_BUF_SIZE, GFP_KERNEL, data);
+	if (!data->cmd_urb) {
+		err = -ENOMEM;
+		goto done;
+	}
+
+	data->evt_urb = bpa10x_alloc_urb(udev, usb_rcvintpipe(udev, BPA10X_EVT_EP),
+					BPA10X_EVT_BUF_SIZE, GFP_KERNEL, data);
+	if (!data->evt_urb) {
+		bpa10x_free_urb(data->cmd_urb);
+		err = -ENOMEM;
+		goto done;
+	}
+
+	data->rx_urb = bpa10x_alloc_urb(udev, usb_rcvbulkpipe(udev, BPA10X_RX_EP),
+					BPA10X_RX_BUF_SIZE, GFP_KERNEL, data);
+	if (!data->rx_urb) {
+		bpa10x_free_urb(data->evt_urb);
+		bpa10x_free_urb(data->cmd_urb);
+		err = -ENOMEM;
+		goto done;
+	}
+
+	data->tx_urb = bpa10x_alloc_urb(udev, usb_sndbulkpipe(udev, BPA10X_TX_EP),
+					BPA10X_TX_BUF_SIZE, GFP_KERNEL, data);
+	if (!data->rx_urb) {
+		bpa10x_free_urb(data->rx_urb);
+		bpa10x_free_urb(data->evt_urb);
+		bpa10x_free_urb(data->cmd_urb);
+		err = -ENOMEM;
+		goto done;
+	}
+
+	write_lock_irqsave(&data->lock, flags);
+
+	err = usb_submit_urb(data->evt_urb, GFP_ATOMIC);
+	if (err < 0) {
+		BT_ERR("%s submit failed for event urb %p with error %d",
+					data->hdev->name, data->evt_urb, err);
+	} else {
+		err = usb_submit_urb(data->rx_urb, GFP_ATOMIC);
+		if (err < 0) {
+			BT_ERR("%s submit failed for rx urb %p with error %d",
+					data->hdev->name, data->evt_urb, err);
+			usb_kill_urb(data->evt_urb);
+		}
+	}
+
+	write_unlock_irqrestore(&data->lock, flags);
+
+done:
+	if (err < 0)
+		clear_bit(HCI_RUNNING, &hdev->flags);
+
+	return err;
+}
+
+static int bpa10x_close(struct hci_dev *hdev)
+{
+	struct bpa10x_data *data = hdev->driver_data;
+	unsigned long flags;
+
+	BT_DBG("hdev %p data %p", hdev, data);
+
+	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
+		return 0;
+
+	write_lock_irqsave(&data->lock, flags);
+
+	skb_queue_purge(&data->cmd_queue);
+	usb_kill_urb(data->cmd_urb);
+	usb_kill_urb(data->evt_urb);
+	usb_kill_urb(data->rx_urb);
+	usb_kill_urb(data->tx_urb);
+
+	write_unlock_irqrestore(&data->lock, flags);
+
+	bpa10x_free_urb(data->cmd_urb);
+	bpa10x_free_urb(data->evt_urb);
+	bpa10x_free_urb(data->rx_urb);
+	bpa10x_free_urb(data->tx_urb);
+
+	return 0;
+}
+
+static int bpa10x_flush(struct hci_dev *hdev)
+{
+	struct bpa10x_data *data = hdev->driver_data;
+
+	BT_DBG("hdev %p data %p", hdev, data);
+
+	skb_queue_purge(&data->cmd_queue);
+
+	return 0;
+}
+
+static int bpa10x_send_frame(struct sk_buff *skb)
+{
+	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+	struct bpa10x_data *data;
+
+	BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, skb->pkt_type, skb->len);
+
+	if (!hdev) {
+		BT_ERR("Frame for unknown HCI device");
+		return -ENODEV;
+	}
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return -EBUSY;
+
+	data = hdev->driver_data;
+
+	/* Prepend skb with frame type */
+	memcpy(skb_push(skb, 1), &(skb->pkt_type), 1);
+
+	switch (skb->pkt_type) {
+	case HCI_COMMAND_PKT:
+		hdev->stat.cmd_tx++;
+		skb_queue_tail(&data->cmd_queue, skb);
+		break;
+
+	case HCI_ACLDATA_PKT:
+		hdev->stat.acl_tx++;
+		skb_queue_tail(&data->tx_queue, skb);
+		break;
+
+	case HCI_SCODATA_PKT:
+		hdev->stat.sco_tx++;
+		skb_queue_tail(&data->tx_queue, skb);
+		break;
+	};
+
+	read_lock(&data->lock);
+
+	bpa10x_wakeup(data);
+
+	read_unlock(&data->lock);
+
+	return 0;
+}
+
+static void bpa10x_destruct(struct hci_dev *hdev)
+{
+	struct bpa10x_data *data = hdev->driver_data;
+
+	BT_DBG("hdev %p data %p", hdev, data);
+
+	kfree(data);
+}
+
+static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct usb_device *udev = interface_to_usbdev(intf);
+	struct hci_dev *hdev;
+	struct bpa10x_data *data;
+	int err;
+
+	BT_DBG("intf %p id %p", intf, id);
+
+	if (ignore)
+		return -ENODEV;
+
+	data = kmalloc(sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		BT_ERR("Can't allocate data structure");
+		return -ENOMEM;
+	}
+
+	memset(data, 0, sizeof(*data));
+
+	data->udev = udev;
+
+	rwlock_init(&data->lock);
+
+	skb_queue_head_init(&data->cmd_queue);
+	skb_queue_head_init(&data->tx_queue);
+
+	hdev = hci_alloc_dev();
+	if (!hdev) {
+		BT_ERR("Can't allocate HCI device");
+		kfree(data);
+		return -ENOMEM;
+	}
+
+	data->hdev = hdev;
+
+	hdev->type = HCI_USB;
+	hdev->driver_data = data;
+	SET_HCIDEV_DEV(hdev, &intf->dev);
+
+	hdev->open	= bpa10x_open;
+	hdev->close	= bpa10x_close;
+	hdev->flush	= bpa10x_flush;
+	hdev->send	= bpa10x_send_frame;
+	hdev->destruct	= bpa10x_destruct;
+
+	hdev->owner = THIS_MODULE;
+
+	err = hci_register_dev(hdev);
+	if (err < 0) {
+		BT_ERR("Can't register HCI device");
+		kfree(data);
+		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);
+	struct hci_dev *hdev = data->hdev;
+
+	BT_DBG("intf %p", intf);
+
+	if (!hdev)
+		return;
+
+	usb_set_intfdata(intf, NULL);
+
+	if (hci_unregister_dev(hdev) < 0)
+		BT_ERR("Can't unregister HCI device %s", hdev->name);
+
+	hci_free_dev(hdev);
+}
+
+static struct usb_driver bpa10x_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "bpa10x",
+	.probe		= bpa10x_probe,
+	.disconnect	= bpa10x_disconnect,
+	.id_table	= bpa10x_table,
+};
+
+static int __init bpa10x_init(void)
+{
+	int err;
+
+	BT_INFO("Digianswer Bluetooth USB driver ver %s", VERSION);
+
+	err = usb_register(&bpa10x_driver);
+	if (err < 0)
+		BT_ERR("Failed to register USB driver");
+
+	return err;
+}
+
+static void __exit bpa10x_exit(void)
+{
+	usb_deregister(&bpa10x_driver);
+}
+
+module_init(bpa10x_init);
+module_exit(bpa10x_exit);
+
+module_param(ignore, bool, 0644);
+MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");