1 files changed, 310 insertions, 0 deletions
diff --git a/drivers/bluetooth_tizen/hci_vhci.c b/drivers/bluetooth_tizen/hci_vhci.c
new file mode 100644
index 0000000..158bfe5
--- /dev/null
+++ b/drivers/bluetooth_tizen/hci_vhci.c
@@ -0,0 +1,310 @@
+/*
+ *
+ *  Bluetooth virtual HCI driver
+ *
+ *  Copyright (C) 2000-2001  Qualcomm Incorporated
+ *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
+ *  Copyright (C) 2004-2006  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/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/poll.h>
+
+#include <linux/skbuff.h>
+#include <linux/miscdevice.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#define VERSION "1.3"
+
+static bool amp;
+
+struct vhci_data {
+	struct hci_dev *hdev;
+
+	unsigned long flags;
+
+	wait_queue_head_t read_wait;
+	struct sk_buff_head readq;
+};
+
+static int vhci_open_dev(struct hci_dev *hdev)
+{
+	set_bit(HCI_RUNNING, &hdev->flags);
+
+	return 0;
+}
+
+static int vhci_close_dev(struct hci_dev *hdev)
+{
+	struct vhci_data *data = hci_get_drvdata(hdev);
+
+	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
+		return 0;
+
+	skb_queue_purge(&data->readq);
+
+	return 0;
+}
+
+static int vhci_flush(struct hci_dev *hdev)
+{
+	struct vhci_data *data = hci_get_drvdata(hdev);
+
+	skb_queue_purge(&data->readq);
+
+	return 0;
+}
+
+static int vhci_send_frame(struct sk_buff *skb)
+{
+	struct hci_dev* hdev = (struct hci_dev *) skb->dev;
+	struct vhci_data *data;
+
+	if (!hdev) {
+		BT_ERR("Frame for unknown HCI device (hdev=NULL)");
+		return -ENODEV;
+	}
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return -EBUSY;
+
+	data = hci_get_drvdata(hdev);
+
+	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
+	skb_queue_tail(&data->readq, skb);
+
+	wake_up_interruptible(&data->read_wait);
+
+	return 0;
+}
+
+static inline ssize_t vhci_get_user(struct vhci_data *data,
+					const char __user *buf, size_t count)
+{
+	struct sk_buff *skb;
+
+	if (count > HCI_MAX_FRAME_SIZE)
+		return -EINVAL;
+
+	skb = bt_skb_alloc(count, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	if (copy_from_user(skb_put(skb, count), buf, count)) {
+		kfree_skb(skb);
+		return -EFAULT;
+	}
+
+	skb->dev = (void *) data->hdev;
+	bt_cb(skb)->pkt_type = *((__u8 *) skb->data);
+	skb_pull(skb, 1);
+
+	hci_recv_frame(skb);
+
+	return count;
+}
+
+static inline ssize_t vhci_put_user(struct vhci_data *data,
+			struct sk_buff *skb, char __user *buf, int count)
+{
+	char __user *ptr = buf;
+	int len, total = 0;
+
+	len = min_t(unsigned int, skb->len, count);
+
+	if (copy_to_user(ptr, skb->data, len))
+		return -EFAULT;
+
+	total += len;
+
+	data->hdev->stat.byte_tx += len;
+
+	switch (bt_cb(skb)->pkt_type) {
+	case HCI_COMMAND_PKT:
+		data->hdev->stat.cmd_tx++;
+		break;
+
+	case HCI_ACLDATA_PKT:
+		data->hdev->stat.acl_tx++;
+		break;
+
+	case HCI_SCODATA_PKT:
+		data->hdev->stat.sco_tx++;
+		break;
+	};
+
+	return total;
+}
+
+static ssize_t vhci_read(struct file *file,
+				char __user *buf, size_t count, loff_t *pos)
+{
+	struct vhci_data *data = file->private_data;
+	struct sk_buff *skb;
+	ssize_t ret = 0;
+
+	while (count) {
+		skb = skb_dequeue(&data->readq);
+		if (skb) {
+			ret = vhci_put_user(data, skb, buf, count);
+			if (ret < 0)
+				skb_queue_head(&data->readq, skb);
+			else
+				kfree_skb(skb);
+			break;
+		}
+
+		if (file->f_flags & O_NONBLOCK) {
+			ret = -EAGAIN;
+			break;
+		}
+
+		ret = wait_event_interruptible(data->read_wait,
+					!skb_queue_empty(&data->readq));
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
+static ssize_t vhci_write(struct file *file,
+			const char __user *buf, size_t count, loff_t *pos)
+{
+	struct vhci_data *data = file->private_data;
+
+	return vhci_get_user(data, buf, count);
+}
+
+static unsigned int vhci_poll(struct file *file, poll_table *wait)
+{
+	struct vhci_data *data = file->private_data;
+
+	poll_wait(file, &data->read_wait, wait);
+
+	if (!skb_queue_empty(&data->readq))
+		return POLLIN | POLLRDNORM;
+
+	return POLLOUT | POLLWRNORM;
+}
+
+static int vhci_open(struct inode *inode, struct file *file)
+{
+	struct vhci_data *data;
+	struct hci_dev *hdev;
+
+	data = kzalloc(sizeof(struct vhci_data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	skb_queue_head_init(&data->readq);
+	init_waitqueue_head(&data->read_wait);
+
+	hdev = hci_alloc_dev();
+	if (!hdev) {
+		kfree(data);
+		return -ENOMEM;
+	}
+
+	data->hdev = hdev;
+
+	hdev->bus = HCI_VIRTUAL;
+	hci_set_drvdata(hdev, data);
+
+	if (amp)
+		hdev->dev_type = HCI_AMP;
+
+	hdev->open     = vhci_open_dev;
+	hdev->close    = vhci_close_dev;
+	hdev->flush    = vhci_flush;
+	hdev->send     = vhci_send_frame;
+
+	if (hci_register_dev(hdev) < 0) {
+		BT_ERR("Can't register HCI device");
+		kfree(data);
+		hci_free_dev(hdev);
+		return -EBUSY;
+	}
+
+	file->private_data = data;
+
+	return nonseekable_open(inode, file);
+}
+
+static int vhci_release(struct inode *inode, struct file *file)
+{
+	struct vhci_data *data = file->private_data;
+	struct hci_dev *hdev = data->hdev;
+
+	hci_unregister_dev(hdev);
+	hci_free_dev(hdev);
+
+	file->private_data = NULL;
+	kfree(data);
+
+	return 0;
+}
+
+static const struct file_operations vhci_fops = {
+	.owner		= THIS_MODULE,
+	.read		= vhci_read,
+	.write		= vhci_write,
+	.poll		= vhci_poll,
+	.open		= vhci_open,
+	.release	= vhci_release,
+	.llseek		= no_llseek,
+};
+
+static struct miscdevice vhci_miscdev= {
+	.name	= "vhci",
+	.fops	= &vhci_fops,
+	.minor	= MISC_DYNAMIC_MINOR,
+};
+
+static int __init vhci_init(void)
+{
+	BT_INFO("Virtual HCI driver ver %s", VERSION);
+
+	return misc_register(&vhci_miscdev);
+}
+
+static void __exit vhci_exit(void)
+{
+	misc_deregister(&vhci_miscdev);
+}
+
+module_init(vhci_init);
+module_exit(vhci_exit);
+
+module_param(amp, bool, 0644);
+MODULE_PARM_DESC(amp, "Create AMP controller device");
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth virtual HCI driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");