patch-2.4.6 linux/drivers/bluetooth/hci_emu.c
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- Lines: 336
- Date:
Mon Jun 11 19:15:27 2001
- Orig file:
v2.4.5/linux/drivers/bluetooth/hci_emu.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.5/linux/drivers/bluetooth/hci_emu.c linux/drivers/bluetooth/hci_emu.c
@@ -0,0 +1,335 @@
+/*
+ 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_emu.c,v 1.1 2001/06/01 08:12:10 davem Exp $
+ */
+
+#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_emu.h>
+
+/* HCI device part */
+
+int hci_emu_open(struct hci_dev *hdev)
+{
+ hdev->flags |= HCI_RUNNING;
+ return 0;
+}
+
+int hci_emu_flush(struct hci_dev *hdev)
+{
+ struct hci_emu_struct *hci_emu = (struct hci_emu_struct *) hdev->driver_data;
+ bluez_skb_queue_purge(&hci_emu->readq);
+ return 0;
+}
+
+int hci_emu_close(struct hci_dev *hdev)
+{
+ hdev->flags &= ~HCI_RUNNING;
+ hci_emu_flush(hdev);
+ return 0;
+}
+
+int hci_emu_send_frame(struct sk_buff *skb)
+{
+ struct hci_dev* hdev = (struct hci_dev *) skb->dev;
+ struct hci_emu_struct *hci_emu;
+
+ if (!hdev) {
+ ERR("Frame for uknown device (hdev=NULL)");
+ return -ENODEV;
+ }
+
+ if (!(hdev->flags & HCI_RUNNING))
+ return -EBUSY;
+
+ hci_emu = (struct hci_emu_struct *) hdev->driver_data;
+
+ memcpy(skb_push(skb, 1), &skb->pkt_type, 1);
+ skb_queue_tail(&hci_emu->readq, skb);
+
+ if (hci_emu->flags & HCI_EMU_FASYNC)
+ kill_fasync(&hci_emu->fasync, SIGIO, POLL_IN);
+ wake_up_interruptible(&hci_emu->read_wait);
+
+ return 0;
+}
+
+/* Character device part */
+
+/* Poll */
+static unsigned int hci_emu_chr_poll(struct file *file, poll_table * wait)
+{
+ struct hci_emu_struct *hci_emu = (struct hci_emu_struct *) file->private_data;
+
+ poll_wait(file, &hci_emu->read_wait, wait);
+
+ if (skb_queue_len(&hci_emu->readq))
+ return POLLIN | POLLRDNORM;
+
+ return POLLOUT | POLLWRNORM;
+}
+
+/* Get packet from user space buffer(already verified) */
+static __inline__ ssize_t hci_emu_get_user(struct hci_emu_struct *hci_emu, const char *buf, size_t count)
+{
+ struct sk_buff *skb;
+
+ if (count > HCI_EMU_MAX_FRAME)
+ 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_emu->hdev;
+ skb->pkt_type = *((__u8 *) skb->data);
+ skb_pull(skb, 1);
+
+ hci_recv_frame(skb);
+
+ return count;
+}
+
+/* Write */
+static ssize_t hci_emu_chr_write(struct file * file, const char * buf,
+ size_t count, loff_t *pos)
+{
+ struct hci_emu_struct *hci_emu = (struct hci_emu_struct *) file->private_data;
+
+ if (verify_area(VERIFY_READ, buf, count))
+ return -EFAULT;
+
+ return hci_emu_get_user(hci_emu, buf, count);
+}
+
+/* Put packet to user space buffer(already verified) */
+static __inline__ ssize_t hci_emu_put_user(struct hci_emu_struct *hci_emu,
+ 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_emu->hdev.stat.byte_tx += len;
+ switch (skb->pkt_type) {
+ case HCI_COMMAND_PKT:
+ hci_emu->hdev.stat.cmd_tx++;
+ break;
+
+ case HCI_ACLDATA_PKT:
+ hci_emu->hdev.stat.acl_tx++;
+ break;
+
+ case HCI_SCODATA_PKT:
+ hci_emu->hdev.stat.cmd_tx++;
+ break;
+ };
+
+ return total;
+}
+
+/* Read */
+static ssize_t hci_emu_chr_read(struct file * file, char * buf, size_t count, loff_t *pos)
+{
+ struct hci_emu_struct *hci_emu = (struct hci_emu_struct *) file->private_data;
+ DECLARE_WAITQUEUE(wait, current);
+ struct sk_buff *skb;
+ ssize_t ret = 0;
+
+ add_wait_queue(&hci_emu->read_wait, &wait);
+ while (count) {
+ current->state = TASK_INTERRUPTIBLE;
+
+ /* Read frames from device queue */
+ if (!(skb = skb_dequeue(&hci_emu->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_emu_put_user(hci_emu, skb, buf, count);
+ else
+ ret = -EFAULT;
+
+ bluez_skb_free(skb);
+ break;
+ }
+
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&hci_emu->read_wait, &wait);
+
+ return ret;
+}
+
+static loff_t hci_emu_chr_lseek(struct file * file, loff_t offset, int origin)
+{
+ return -ESPIPE;
+}
+
+static int hci_emu_chr_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ return -EINVAL;
+}
+
+static int hci_emu_chr_fasync(int fd, struct file *file, int on)
+{
+ struct hci_emu_struct *hci_emu = (struct hci_emu_struct *) file->private_data;
+ int ret;
+
+ if ((ret = fasync_helper(fd, file, on, &hci_emu->fasync)) < 0)
+ return ret;
+
+ if (on)
+ hci_emu->flags |= HCI_EMU_FASYNC;
+ else
+ hci_emu->flags &= ~HCI_EMU_FASYNC;
+
+ return 0;
+}
+
+static int hci_emu_chr_open(struct inode *inode, struct file * file)
+{
+ struct hci_emu_struct *hci_emu = NULL;
+ struct hci_dev *hdev;
+
+ if (!(hci_emu = kmalloc(sizeof(struct hci_emu_struct), GFP_KERNEL)))
+ return -ENOMEM;
+
+ memset(hci_emu, 0, sizeof(struct hci_emu_struct));
+
+ skb_queue_head_init(&hci_emu->readq);
+ init_waitqueue_head(&hci_emu->read_wait);
+
+ /* Initialize and register HCI device */
+ hdev = &hci_emu->hdev;
+
+ hdev->type = HCI_EMU;
+ hdev->driver_data = hci_emu;
+
+ hdev->open = hci_emu_open;
+ hdev->close = hci_emu_close;
+ hdev->flush = hci_emu_flush;
+ hdev->send = hci_emu_send_frame;
+
+ if (hci_register_dev(hdev) < 0) {
+ kfree(hci_emu);
+ return -EBUSY;
+ }
+
+ file->private_data = hci_emu;
+ return 0;
+}
+
+static int hci_emu_chr_close(struct inode *inode, struct file *file)
+{
+ struct hci_emu_struct *hci_emu = (struct hci_emu_struct *) file->private_data;
+
+ if (hci_unregister_dev(&hci_emu->hdev) < 0) {
+ ERR("Can't unregister HCI device %s", hci_emu->hdev.name);
+ }
+
+ kfree(hci_emu);
+ file->private_data = NULL;
+
+ return 0;
+}
+
+static struct file_operations hci_emu_fops = {
+ owner: THIS_MODULE,
+ llseek: hci_emu_chr_lseek,
+ read: hci_emu_chr_read,
+ write: hci_emu_chr_write,
+ poll: hci_emu_chr_poll,
+ ioctl: hci_emu_chr_ioctl,
+ open: hci_emu_chr_open,
+ release:hci_emu_chr_close,
+ fasync: hci_emu_chr_fasync
+};
+
+static struct miscdevice hci_emu_miscdev=
+{
+ HCI_EMU_MINOR,
+ "hci_emu",
+ &hci_emu_fops
+};
+
+int __init hci_emu_init(void)
+{
+ INF("BlueZ HCI EMU driver ver %s Copyright (C) 2000,2001 Qualcomm Inc",
+ BLUEZ_VER);
+ INF("Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>");
+
+ if (misc_register(&hci_emu_miscdev)) {
+ ERR("Can't register misc device %d\n", HCI_EMU_MINOR);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+void hci_emu_cleanup(void)
+{
+ misc_deregister(&hci_emu_miscdev);
+}
+
+module_init(hci_emu_init);
+module_exit(hci_emu_cleanup);
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