1 files changed, 364 insertions, 0 deletions

diff --git a/drivers/bluetooth/hci_vhci.c b/drivers/bluetooth/hci_vhci.c
new file mode 100644
index 000000000000..3256192dcde8
--- /dev/null
+++ b/drivers/bluetooth/hci_vhci.c
@@ -0,0 +1,364 @@
+/* 
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2000-2001 Qualcomm Incorporated
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/*
+ * Bluetooth HCI virtual device driver.
+ *
+ * $Id: hci_vhci.c,v 1.3 2002/04/17 17:37:20 maxk Exp $ 
+ */
+#define VERSION "1.1"
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/fcntl.h>
+#include <linux/init.h>
+#include <linux/random.h>
+
+#include <linux/skbuff.h>
+#include <linux/miscdevice.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include "hci_vhci.h"
+
+/* HCI device part */
+
+static int hci_vhci_open(struct hci_dev *hdev)
+{
+        set_bit(HCI_RUNNING, &hdev->flags);
+        return 0;
+}
+
+static int hci_vhci_flush(struct hci_dev *hdev)
+{
+        struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) hdev->driver_data;
+        skb_queue_purge(&hci_vhci->readq);
+        return 0;
+}
+
+static int hci_vhci_close(struct hci_dev *hdev)
+{
+        if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
+                return 0;
+
+        hci_vhci_flush(hdev);
+        return 0;
+}
+
+static void hci_vhci_destruct(struct hci_dev *hdev)
+{
+        struct hci_vhci_struct *vhci;
+
+        if (!hdev) return;
+
+        vhci = (struct hci_vhci_struct *) hdev->driver_data;
+        kfree(vhci);
+}
+
+static int hci_vhci_send_frame(struct sk_buff *skb)
+{
+        struct hci_dev* hdev = (struct hci_dev *) skb->dev;
+        struct hci_vhci_struct *hci_vhci;
+
+        if (!hdev) {
+                BT_ERR("Frame for uknown device (hdev=NULL)");
+                return -ENODEV;
+        }
+
+        if (!test_bit(HCI_RUNNING, &hdev->flags))
+                return -EBUSY;
+
+        hci_vhci = (struct hci_vhci_struct *) hdev->driver_data;
+
+        memcpy(skb_push(skb, 1), &skb->pkt_type, 1);
+        skb_queue_tail(&hci_vhci->readq, skb);
+
+        if (hci_vhci->flags & VHCI_FASYNC)
+                kill_fasync(&hci_vhci->fasync, SIGIO, POLL_IN);
+        wake_up_interruptible(&hci_vhci->read_wait);
+
+        return 0;
+}
+
+/* Character device part */
+
+/* Poll */
+static unsigned int hci_vhci_chr_poll(struct file *file, poll_table * wait)
+{  
+        struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
+
+        poll_wait(file, &hci_vhci->read_wait, wait);
+ 
+        if (skb_queue_len(&hci_vhci->readq))
+                return POLLIN | POLLRDNORM;
+
+        return POLLOUT | POLLWRNORM;
+}
+
+/* Get packet from user space buffer(already verified) */
+static inline ssize_t hci_vhci_get_user(struct hci_vhci_struct *hci_vhci, const char __user *buf, size_t count)
+{
+        struct sk_buff *skb;
+
+        if (count > HCI_MAX_FRAME_SIZE)
+                return -EINVAL;
+
+        if (!(skb = bt_skb_alloc(count, GFP_KERNEL)))
+                return -ENOMEM;
+        
+        if (copy_from_user(skb_put(skb, count), buf, count)) {
+                kfree_skb(skb);
+                return -EFAULT;
+        }
+
+        skb->dev = (void *) hci_vhci->hdev;
+        skb->pkt_type = *((__u8 *) skb->data);
+        skb_pull(skb, 1);
+
+        hci_recv_frame(skb);
+
+        return count;
+} 
+
+/* Write */
+static ssize_t hci_vhci_chr_write(struct file * file, const char __user * buf, 
+                             size_t count, loff_t *pos)
+{
+        struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
+
+        if (!access_ok(VERIFY_READ, buf, count))
+                return -EFAULT;
+
+        return hci_vhci_get_user(hci_vhci, buf, count);
+}
+
+/* Put packet to user space buffer(already verified) */
+static inline ssize_t hci_vhci_put_user(struct hci_vhci_struct *hci_vhci,
+                                       struct sk_buff *skb, char __user *buf,
+                                       int count)
+{
+        int len = count, total = 0;
+        char __user *ptr = buf;
+
+        len = min_t(unsigned int, skb->len, len);
+        if (copy_to_user(ptr, skb->data, len))
+                return -EFAULT;
+        total += len;
+
+        hci_vhci->hdev->stat.byte_tx += len;
+        switch (skb->pkt_type) {
+                case HCI_COMMAND_PKT:
+                        hci_vhci->hdev->stat.cmd_tx++;
+                        break;
+
+                case HCI_ACLDATA_PKT:
+                        hci_vhci->hdev->stat.acl_tx++;
+                        break;
+
+                case HCI_SCODATA_PKT:
+                        hci_vhci->hdev->stat.cmd_tx++;
+                        break;
+        };
+
+        return total;
+}
+
+/* Read */
+static ssize_t hci_vhci_chr_read(struct file * file, char __user * buf, size_t count, loff_t *pos)
+{
+        struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
+        DECLARE_WAITQUEUE(wait, current);
+        struct sk_buff *skb;
+        ssize_t ret = 0;
+
+        add_wait_queue(&hci_vhci->read_wait, &wait);
+        while (count) {
+                set_current_state(TASK_INTERRUPTIBLE);
+
+                /* Read frames from device queue */
+                if (!(skb = skb_dequeue(&hci_vhci->readq))) {
+                        if (file->f_flags & O_NONBLOCK) {
+                                ret = -EAGAIN;
+                                break;
+                        }
+                        if (signal_pending(current)) {
+                                ret = -ERESTARTSYS;
+                                break;
+                        }
+
+                        /* Nothing to read, let's sleep */
+                        schedule();
+                        continue;
+                }
+
+                if (access_ok(VERIFY_WRITE, buf, count))
+                        ret = hci_vhci_put_user(hci_vhci, skb, buf, count);
+                else
+                        ret = -EFAULT;
+
+                kfree_skb(skb);
+                break;
+        }
+        set_current_state(TASK_RUNNING);
+        remove_wait_queue(&hci_vhci->read_wait, &wait);
+
+        return ret;
+}
+
+static loff_t hci_vhci_chr_lseek(struct file * file, loff_t offset, int origin)
+{
+        return -ESPIPE;
+}
+
+static int hci_vhci_chr_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+        return -EINVAL;
+}
+
+static int hci_vhci_chr_fasync(int fd, struct file *file, int on)
+{
+        struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
+        int ret;
+
+        if ((ret = fasync_helper(fd, file, on, &hci_vhci->fasync)) < 0)
+                return ret; 
+ 
+        if (on)
+                hci_vhci->flags |= VHCI_FASYNC;
+        else 
+                hci_vhci->flags &= ~VHCI_FASYNC;
+
+        return 0;
+}
+
+static int hci_vhci_chr_open(struct inode *inode, struct file * file)
+{
+        struct hci_vhci_struct *hci_vhci = NULL; 
+        struct hci_dev *hdev;
+
+        if (!(hci_vhci = kmalloc(sizeof(struct hci_vhci_struct), GFP_KERNEL)))
+                return -ENOMEM;
+
+        memset(hci_vhci, 0, sizeof(struct hci_vhci_struct));
+
+        skb_queue_head_init(&hci_vhci->readq);
+        init_waitqueue_head(&hci_vhci->read_wait);
+
+        /* Initialize and register HCI device */
+        hdev = hci_alloc_dev();
+        if (!hdev) {
+                kfree(hci_vhci);
+                return -ENOMEM;
+        }
+
+        hci_vhci->hdev = hdev;
+
+        hdev->type = HCI_VHCI;
+        hdev->driver_data = hci_vhci;
+
+        hdev->open  = hci_vhci_open;
+        hdev->close = hci_vhci_close;
+        hdev->flush = hci_vhci_flush;
+        hdev->send  = hci_vhci_send_frame;
+        hdev->destruct = hci_vhci_destruct;
+
+        hdev->owner = THIS_MODULE;
+        
+        if (hci_register_dev(hdev) < 0) {
+                kfree(hci_vhci);
+                hci_free_dev(hdev);
+                return -EBUSY;
+        }
+
+        file->private_data = hci_vhci;
+        return nonseekable_open(inode, file);   
+}
+
+static int hci_vhci_chr_close(struct inode *inode, struct file *file)
+{
+        struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
+        struct hci_dev *hdev = hci_vhci->hdev;
+
+        if (hci_unregister_dev(hdev) < 0) {
+                BT_ERR("Can't unregister HCI device %s", hdev->name);
+        }
+
+        hci_free_dev(hdev);
+
+        file->private_data = NULL;
+        return 0;
+}
+
+static struct file_operations hci_vhci_fops = {
+        .owner  = THIS_MODULE,  
+        .llseek = hci_vhci_chr_lseek,
+        .read   = hci_vhci_chr_read,
+        .write  = hci_vhci_chr_write,
+        .poll   = hci_vhci_chr_poll,
+        .ioctl  = hci_vhci_chr_ioctl,
+        .open   = hci_vhci_chr_open,
+        .release        = hci_vhci_chr_close,
+        .fasync = hci_vhci_chr_fasync           
+};
+
+static struct miscdevice hci_vhci_miscdev=
+{
+        VHCI_MINOR,
+        "hci_vhci",
+        &hci_vhci_fops
+};
+
+static int __init hci_vhci_init(void)
+{
+        BT_INFO("VHCI driver ver %s", VERSION);
+
+        if (misc_register(&hci_vhci_miscdev)) {
+                BT_ERR("Can't register misc device %d\n", VHCI_MINOR);
+                return -EIO;
+        }
+
+        return 0;
+}
+
+static void hci_vhci_cleanup(void)
+{
+        misc_deregister(&hci_vhci_miscdev);
+}
+
+module_init(hci_vhci_init);
+module_exit(hci_vhci_cleanup);
+
+MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>");
+MODULE_DESCRIPTION("Bluetooth VHCI driver ver " VERSION);
+MODULE_LICENSE("GPL");