patch-2.4.10 linux/drivers/bluetooth/hci_vhci.c

• Lines: 341
• Date: Fri Sep 7 09:28:38 2001
• Orig file: v2.4.9/linux/drivers/bluetooth/hci_vhci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/drivers/bluetooth/hci_vhci.c linux/drivers/bluetooth/hci_vhci.c
@@ -0,0 +1,340 @@
+/* 
+   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.
+*/
+
+/*
+ * BlueZ HCI virtual device driver.
+ *
+ * $Id: hci_vhci.c,v 1.3 2001/08/03 04:19:50 maxk Exp $ 
+ */
+#define VERSION "1.0"
+
+#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/bluez.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/hci_vhci.h>
+
+/* HCI device part */
+
+int hci_vhci_open(struct hci_dev *hdev)
+{
+	hdev->flags |= HCI_RUNNING;
+	return 0;
+}
+
+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;
+}
+
+int hci_vhci_close(struct hci_dev *hdev)
+{
+	hdev->flags &= ~HCI_RUNNING;
+	hci_vhci_flush(hdev);
+	return 0;
+}
+
+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) {
+		ERR("Frame for uknown device (hdev=NULL)");
+		return -ENODEV;
+	}
+
+	if (!(hdev->flags & HCI_RUNNING))
+		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 *buf, size_t count)
+{
+	struct sk_buff *skb;
+
+	if (count > HCI_MAX_FRAME_SIZE)
+		return -EINVAL;
+
+	if (!(skb = bluez_skb_alloc(count, GFP_KERNEL)))
+		return -ENOMEM;
+	
+	copy_from_user(skb_put(skb, count), buf, count); 
+
+	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 * buf, 
+			     size_t count, loff_t *pos)
+{
+	struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
+
+	if (verify_area(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 *buf, int count)
+{
+	int len = count, total = 0;
+	char *ptr = buf;
+
+	len = MIN(skb->len, len); 
+	copy_to_user(ptr, skb->data, len); 
+	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 * 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) {
+		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 (!verify_area(VERIFY_WRITE, buf, count))
+			ret = hci_vhci_put_user(hci_vhci, skb, buf, count);
+		else
+			ret = -EFAULT;
+
+		kfree_skb(skb);
+		break;
+	}
+
+	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_vhci->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;
+
+	if (hci_register_dev(hdev) < 0) {
+		kfree(hci_vhci);
+		return -EBUSY;
+	}
+
+	file->private_data = hci_vhci;
+	return 0;   
+}
+
+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;
+
+	if (hci_unregister_dev(&hci_vhci->hdev) < 0) {
+		ERR("Can't unregister HCI device %s", hci_vhci->hdev.name);
+	}
+
+	kfree(hci_vhci);
+	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
+};
+
+int __init hci_vhci_init(void)
+{
+	INF("BlueZ VHCI driver ver %s Copyright (C) 2000,2001 Qualcomm Inc",  
+		VERSION);
+	INF("Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>");
+
+	if (misc_register(&hci_vhci_miscdev)) {
+		ERR("Can't register misc device %d\n", VHCI_MINOR);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+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("BlueZ VHCI driver ver " VERSION);
+MODULE_LICENSE("GPL");