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30#define VERSION "1.1"
31
32#include <linux/config.h>
33#include <linux/module.h>
34
35#include <linux/errno.h>
36#include <linux/kernel.h>
37#include <linux/major.h>
38#include <linux/sched.h>
39#include <linux/slab.h>
40#include <linux/poll.h>
41#include <linux/fcntl.h>
42#include <linux/init.h>
43#include <linux/random.h>
44
45#include <linux/skbuff.h>
46#include <linux/miscdevice.h>
47
48#include <asm/system.h>
49#include <asm/uaccess.h>
50
51#include <net/bluetooth/bluetooth.h>
52#include <net/bluetooth/hci_core.h>
53#include "hci_vhci.h"
54
55
56
57static int hci_vhci_open(struct hci_dev *hdev)
58{
59 set_bit(HCI_RUNNING, &hdev->flags);
60 return 0;
61}
62
63static int hci_vhci_flush(struct hci_dev *hdev)
64{
65 struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) hdev->driver_data;
66 skb_queue_purge(&hci_vhci->readq);
67 return 0;
68}
69
70static int hci_vhci_close(struct hci_dev *hdev)
71{
72 if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
73 return 0;
74
75 hci_vhci_flush(hdev);
76 return 0;
77}
78
79static void hci_vhci_destruct(struct hci_dev *hdev)
80{
81 struct hci_vhci_struct *vhci;
82
83 if (!hdev) return;
84
85 vhci = (struct hci_vhci_struct *) hdev->driver_data;
86 kfree(vhci);
87
88 MOD_DEC_USE_COUNT;
89}
90
91static int hci_vhci_send_frame(struct sk_buff *skb)
92{
93 struct hci_dev* hdev = (struct hci_dev *) skb->dev;
94 struct hci_vhci_struct *hci_vhci;
95
96 if (!hdev) {
97 BT_ERR("Frame for uknown device (hdev=NULL)");
98 return -ENODEV;
99 }
100
101 if (!test_bit(HCI_RUNNING, &hdev->flags))
102 return -EBUSY;
103
104 hci_vhci = (struct hci_vhci_struct *) hdev->driver_data;
105
106 memcpy(skb_push(skb, 1), &skb->pkt_type, 1);
107 skb_queue_tail(&hci_vhci->readq, skb);
108
109 if (hci_vhci->flags & VHCI_FASYNC)
110 kill_fasync(&hci_vhci->fasync, SIGIO, POLL_IN);
111 wake_up_interruptible(&hci_vhci->read_wait);
112
113 return 0;
114}
115
116
117
118
119static unsigned int hci_vhci_chr_poll(struct file *file, poll_table * wait)
120{
121 struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
122
123 poll_wait(file, &hci_vhci->read_wait, wait);
124
125 if (skb_queue_len(&hci_vhci->readq))
126 return POLLIN | POLLRDNORM;
127
128 return POLLOUT | POLLWRNORM;
129}
130
131
132static inline ssize_t hci_vhci_get_user(struct hci_vhci_struct *hci_vhci, const char *buf, size_t count)
133{
134 struct sk_buff *skb;
135
136 if (count > HCI_MAX_FRAME_SIZE)
137 return -EINVAL;
138
139 if (!(skb = bluez_skb_alloc(count, GFP_KERNEL)))
140 return -ENOMEM;
141
142 copy_from_user(skb_put(skb, count), buf, count);
143
144 skb->dev = (void *) &hci_vhci->hdev;
145 skb->pkt_type = *((__u8 *) skb->data);
146 skb_pull(skb, 1);
147
148 hci_recv_frame(skb);
149
150 return count;
151}
152
153
154static ssize_t hci_vhci_chr_write(struct file * file, const char * buf,
155 size_t count, loff_t *pos)
156{
157 struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
158
159 if (verify_area(VERIFY_READ, buf, count))
160 return -EFAULT;
161
162 return hci_vhci_get_user(hci_vhci, buf, count);
163}
164
165
166static inline ssize_t hci_vhci_put_user(struct hci_vhci_struct *hci_vhci,
167 struct sk_buff *skb, char *buf, int count)
168{
169 int len = count, total = 0;
170 char *ptr = buf;
171
172 len = MIN(skb->len, len);
173 copy_to_user(ptr, skb->data, len);
174 total += len;
175
176 hci_vhci->hdev.stat.byte_tx += len;
177 switch (skb->pkt_type) {
178 case HCI_COMMAND_PKT:
179 hci_vhci->hdev.stat.cmd_tx++;
180 break;
181
182 case HCI_ACLDATA_PKT:
183 hci_vhci->hdev.stat.acl_tx++;
184 break;
185
186 case HCI_SCODATA_PKT:
187 hci_vhci->hdev.stat.cmd_tx++;
188 break;
189 };
190
191 return total;
192}
193
194
195static ssize_t hci_vhci_chr_read(struct file * file, char * buf, size_t count, loff_t *pos)
196{
197 struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
198 DECLARE_WAITQUEUE(wait, current);
199 struct sk_buff *skb;
200 ssize_t ret = 0;
201
202 add_wait_queue(&hci_vhci->read_wait, &wait);
203 while (count) {
204 set_current_state(TASK_INTERRUPTIBLE);
205
206
207 if (!(skb = skb_dequeue(&hci_vhci->readq))) {
208 if (file->f_flags & O_NONBLOCK) {
209 ret = -EAGAIN;
210 break;
211 }
212 if (signal_pending(current)) {
213 ret = -ERESTARTSYS;
214 break;
215 }
216
217
218 schedule();
219 continue;
220 }
221
222 if (!verify_area(VERIFY_WRITE, buf, count))
223 ret = hci_vhci_put_user(hci_vhci, skb, buf, count);
224 else
225 ret = -EFAULT;
226
227 kfree_skb(skb);
228 break;
229 }
230 set_current_state(TASK_RUNNING);
231 remove_wait_queue(&hci_vhci->read_wait, &wait);
232
233 return ret;
234}
235
236static loff_t hci_vhci_chr_lseek(struct file * file, loff_t offset, int origin)
237{
238 return -ESPIPE;
239}
240
241static int hci_vhci_chr_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
242{
243 return -EINVAL;
244}
245
246static int hci_vhci_chr_fasync(int fd, struct file *file, int on)
247{
248 struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
249 int ret;
250
251 if ((ret = fasync_helper(fd, file, on, &hci_vhci->fasync)) < 0)
252 return ret;
253
254 if (on)
255 hci_vhci->flags |= VHCI_FASYNC;
256 else
257 hci_vhci->flags &= ~VHCI_FASYNC;
258
259 return 0;
260}
261
262static int hci_vhci_chr_open(struct inode *inode, struct file * file)
263{
264 struct hci_vhci_struct *hci_vhci = NULL;
265 struct hci_dev *hdev;
266
267 if (!(hci_vhci = kmalloc(sizeof(struct hci_vhci_struct), GFP_KERNEL)))
268 return -ENOMEM;
269
270 memset(hci_vhci, 0, sizeof(struct hci_vhci_struct));
271
272 skb_queue_head_init(&hci_vhci->readq);
273 init_waitqueue_head(&hci_vhci->read_wait);
274
275
276 hdev = &hci_vhci->hdev;
277
278 hdev->type = HCI_VHCI;
279 hdev->driver_data = hci_vhci;
280
281 hdev->open = hci_vhci_open;
282 hdev->close = hci_vhci_close;
283 hdev->flush = hci_vhci_flush;
284 hdev->send = hci_vhci_send_frame;
285 hdev->destruct = hci_vhci_destruct;
286
287 if (hci_register_dev(hdev) < 0) {
288 kfree(hci_vhci);
289 return -EBUSY;
290 }
291 MOD_INC_USE_COUNT;
292
293 file->private_data = hci_vhci;
294 return 0;
295}
296
297static int hci_vhci_chr_close(struct inode *inode, struct file *file)
298{
299 struct hci_vhci_struct *hci_vhci = (struct hci_vhci_struct *) file->private_data;
300
301 if (hci_unregister_dev(&hci_vhci->hdev) < 0) {
302 BT_ERR("Can't unregister HCI device %s", hci_vhci->hdev.name);
303 }
304
305 file->private_data = NULL;
306 return 0;
307}
308
309static struct file_operations hci_vhci_fops = {
310 owner: THIS_MODULE,
311 llseek: hci_vhci_chr_lseek,
312 read: hci_vhci_chr_read,
313 write: hci_vhci_chr_write,
314 poll: hci_vhci_chr_poll,
315 ioctl: hci_vhci_chr_ioctl,
316 open: hci_vhci_chr_open,
317 release:hci_vhci_chr_close,
318 fasync: hci_vhci_chr_fasync
319};
320
321static struct miscdevice hci_vhci_miscdev=
322{
323 VHCI_MINOR,
324 "hci_vhci",
325 &hci_vhci_fops
326};
327
328int __init hci_vhci_init(void)
329{
330 BT_INFO("BlueZ VHCI driver ver %s Copyright (C) 2000,2001 Qualcomm Inc",
331 VERSION);
332 BT_INFO("Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>");
333
334 if (misc_register(&hci_vhci_miscdev)) {
335 BT_ERR("Can't register misc device %d\n", VHCI_MINOR);
336 return -EIO;
337 }
338
339 return 0;
340}
341
342void hci_vhci_cleanup(void)
343{
344 misc_deregister(&hci_vhci_miscdev);
345}
346
347module_init(hci_vhci_init);
348module_exit(hci_vhci_cleanup);
349
350MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>");
351MODULE_DESCRIPTION("BlueZ VHCI driver ver " VERSION);
352MODULE_LICENSE("GPL");
353
