zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/bluetooth/hci_vhci.c b/ap/os/linux/linux-3.4.x/drivers/bluetooth/hci_vhci.c
new file mode 100644
index 0000000..158bfe5
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/bluetooth/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");