Input: drop redundant includes of moduleparam.h
[linux-2.6] / drivers / bluetooth / bpa10x.c
1 /*
2  *
3  *  Digianswer Bluetooth USB driver
4  *
5  *  Copyright (C) 2004-2007  Marcel Holtmann <marcel@holtmann.org>
6  *
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21  *
22  */
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/types.h>
29 #include <linux/sched.h>
30 #include <linux/errno.h>
31 #include <linux/skbuff.h>
32
33 #include <linux/usb.h>
34
35 #include <net/bluetooth/bluetooth.h>
36 #include <net/bluetooth/hci_core.h>
37
38 #ifndef CONFIG_BT_HCIBPA10X_DEBUG
39 #undef  BT_DBG
40 #define BT_DBG(D...)
41 #endif
42
43 #define VERSION "0.9"
44
45 static int ignore = 0;
46
47 static struct usb_device_id bpa10x_table[] = {
48         /* Tektronix BPA 100/105 (Digianswer) */
49         { USB_DEVICE(0x08fd, 0x0002) },
50
51         { }     /* Terminating entry */
52 };
53
54 MODULE_DEVICE_TABLE(usb, bpa10x_table);
55
56 struct bpa10x_data {
57         struct hci_dev    *hdev;
58         struct usb_device *udev;
59
60         struct usb_anchor tx_anchor;
61         struct usb_anchor rx_anchor;
62
63         struct sk_buff *rx_skb[2];
64 };
65
66 #define HCI_VENDOR_HDR_SIZE 5
67
68 struct hci_vendor_hdr {
69         __u8    type;
70         __le16  snum;
71         __le16  dlen;
72 } __attribute__ ((packed));
73
74 static int bpa10x_recv(struct hci_dev *hdev, int queue, void *buf, int count)
75 {
76         struct bpa10x_data *data = hdev->driver_data;
77
78         BT_DBG("%s queue %d buffer %p count %d", hdev->name,
79                                                         queue, buf, count);
80
81         if (queue < 0 || queue > 1)
82                 return -EILSEQ;
83
84         hdev->stat.byte_rx += count;
85
86         while (count) {
87                 struct sk_buff *skb = data->rx_skb[queue];
88                 struct { __u8 type; int expect; } *scb;
89                 int type, len = 0;
90
91                 if (!skb) {
92                         /* Start of the frame */
93
94                         type = *((__u8 *) buf);
95                         count--; buf++;
96
97                         switch (type) {
98                         case HCI_EVENT_PKT:
99                                 if (count >= HCI_EVENT_HDR_SIZE) {
100                                         struct hci_event_hdr *h = buf;
101                                         len = HCI_EVENT_HDR_SIZE + h->plen;
102                                 } else
103                                         return -EILSEQ;
104                                 break;
105
106                         case HCI_ACLDATA_PKT:
107                                 if (count >= HCI_ACL_HDR_SIZE) {
108                                         struct hci_acl_hdr *h = buf;
109                                         len = HCI_ACL_HDR_SIZE +
110                                                         __le16_to_cpu(h->dlen);
111                                 } else
112                                         return -EILSEQ;
113                                 break;
114
115                         case HCI_SCODATA_PKT:
116                                 if (count >= HCI_SCO_HDR_SIZE) {
117                                         struct hci_sco_hdr *h = buf;
118                                         len = HCI_SCO_HDR_SIZE + h->dlen;
119                                 } else
120                                         return -EILSEQ;
121                                 break;
122
123                         case HCI_VENDOR_PKT:
124                                 if (count >= HCI_VENDOR_HDR_SIZE) {
125                                         struct hci_vendor_hdr *h = buf;
126                                         len = HCI_VENDOR_HDR_SIZE +
127                                                         __le16_to_cpu(h->dlen);
128                                 } else
129                                         return -EILSEQ;
130                                 break;
131                         }
132
133                         skb = bt_skb_alloc(len, GFP_ATOMIC);
134                         if (!skb) {
135                                 BT_ERR("%s no memory for packet", hdev->name);
136                                 return -ENOMEM;
137                         }
138
139                         skb->dev = (void *) hdev;
140
141                         data->rx_skb[queue] = skb;
142
143                         scb = (void *) skb->cb;
144                         scb->type = type;
145                         scb->expect = len;
146                 } else {
147                         /* Continuation */
148
149                         scb = (void *) skb->cb;
150                         len = scb->expect;
151                 }
152
153                 len = min(len, count);
154
155                 memcpy(skb_put(skb, len), buf, len);
156
157                 scb->expect -= len;
158
159                 if (scb->expect == 0) {
160                         /* Complete frame */
161
162                         data->rx_skb[queue] = NULL;
163
164                         bt_cb(skb)->pkt_type = scb->type;
165                         hci_recv_frame(skb);
166                 }
167
168                 count -= len; buf += len;
169         }
170
171         return 0;
172 }
173
174 static void bpa10x_tx_complete(struct urb *urb)
175 {
176         struct sk_buff *skb = urb->context;
177         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
178
179         BT_DBG("%s urb %p status %d count %d", hdev->name,
180                                         urb, urb->status, urb->actual_length);
181
182         if (!test_bit(HCI_RUNNING, &hdev->flags))
183                 goto done;
184
185         if (!urb->status)
186                 hdev->stat.byte_tx += urb->transfer_buffer_length;
187         else
188                 hdev->stat.err_tx++;
189
190 done:
191         kfree(urb->setup_packet);
192
193         kfree_skb(skb);
194 }
195
196 static void bpa10x_rx_complete(struct urb *urb)
197 {
198         struct hci_dev *hdev = urb->context;
199         struct bpa10x_data *data = hdev->driver_data;
200         int err;
201
202         BT_DBG("%s urb %p status %d count %d", hdev->name,
203                                         urb, urb->status, urb->actual_length);
204
205         if (!test_bit(HCI_RUNNING, &hdev->flags))
206                 return;
207
208         if (urb->status == 0) {
209                 if (bpa10x_recv(hdev, usb_pipebulk(urb->pipe),
210                                                 urb->transfer_buffer,
211                                                 urb->actual_length) < 0) {
212                         BT_ERR("%s corrupted event packet", hdev->name);
213                         hdev->stat.err_rx++;
214                 }
215         }
216
217         usb_anchor_urb(urb, &data->rx_anchor);
218
219         err = usb_submit_urb(urb, GFP_ATOMIC);
220         if (err < 0) {
221                 BT_ERR("%s urb %p failed to resubmit (%d)",
222                                                 hdev->name, urb, -err);
223                 usb_unanchor_urb(urb);
224         }
225 }
226
227 static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
228 {
229         struct bpa10x_data *data = hdev->driver_data;
230         struct urb *urb;
231         unsigned char *buf;
232         unsigned int pipe;
233         int err, size = 16;
234
235         BT_DBG("%s", hdev->name);
236
237         urb = usb_alloc_urb(0, GFP_KERNEL);
238         if (!urb)
239                 return -ENOMEM;
240
241         buf = kmalloc(size, GFP_KERNEL);
242         if (!buf) {
243                 usb_free_urb(urb);
244                 return -ENOMEM;
245         }
246
247         pipe = usb_rcvintpipe(data->udev, 0x81);
248
249         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
250                                                 bpa10x_rx_complete, hdev, 1);
251
252         urb->transfer_flags |= URB_FREE_BUFFER;
253
254         usb_anchor_urb(urb, &data->rx_anchor);
255
256         err = usb_submit_urb(urb, GFP_KERNEL);
257         if (err < 0) {
258                 BT_ERR("%s urb %p submission failed (%d)",
259                                                 hdev->name, urb, -err);
260                 usb_unanchor_urb(urb);
261                 kfree(buf);
262         }
263
264         usb_free_urb(urb);
265
266         return err;
267 }
268
269 static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
270 {
271         struct bpa10x_data *data = hdev->driver_data;
272         struct urb *urb;
273         unsigned char *buf;
274         unsigned int pipe;
275         int err, size = 64;
276
277         BT_DBG("%s", hdev->name);
278
279         urb = usb_alloc_urb(0, GFP_KERNEL);
280         if (!urb)
281                 return -ENOMEM;
282
283         buf = kmalloc(size, GFP_KERNEL);
284         if (!buf) {
285                 usb_free_urb(urb);
286                 return -ENOMEM;
287         }
288
289         pipe = usb_rcvbulkpipe(data->udev, 0x82);
290
291         usb_fill_bulk_urb(urb, data->udev, pipe,
292                                         buf, size, bpa10x_rx_complete, hdev);
293
294         urb->transfer_flags |= URB_FREE_BUFFER;
295
296         usb_anchor_urb(urb, &data->rx_anchor);
297
298         err = usb_submit_urb(urb, GFP_KERNEL);
299         if (err < 0) {
300                 BT_ERR("%s urb %p submission failed (%d)",
301                                                 hdev->name, urb, -err);
302                 usb_unanchor_urb(urb);
303                 kfree(buf);
304         }
305
306         usb_free_urb(urb);
307
308         return err;
309 }
310
311 static int bpa10x_open(struct hci_dev *hdev)
312 {
313         struct bpa10x_data *data = hdev->driver_data;
314         int err;
315
316         BT_DBG("%s", hdev->name);
317
318         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
319                 return 0;
320
321         err = bpa10x_submit_intr_urb(hdev);
322         if (err < 0)
323                 goto error;
324
325         err = bpa10x_submit_bulk_urb(hdev);
326         if (err < 0)
327                 goto error;
328
329         return 0;
330
331 error:
332         usb_kill_anchored_urbs(&data->rx_anchor);
333
334         clear_bit(HCI_RUNNING, &hdev->flags);
335
336         return err;
337 }
338
339 static int bpa10x_close(struct hci_dev *hdev)
340 {
341         struct bpa10x_data *data = hdev->driver_data;
342
343         BT_DBG("%s", hdev->name);
344
345         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
346                 return 0;
347
348         usb_kill_anchored_urbs(&data->rx_anchor);
349
350         return 0;
351 }
352
353 static int bpa10x_flush(struct hci_dev *hdev)
354 {
355         struct bpa10x_data *data = hdev->driver_data;
356
357         BT_DBG("%s", hdev->name);
358
359         usb_kill_anchored_urbs(&data->tx_anchor);
360
361         return 0;
362 }
363
364 static int bpa10x_send_frame(struct sk_buff *skb)
365 {
366         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
367         struct bpa10x_data *data = hdev->driver_data;
368         struct usb_ctrlrequest *dr;
369         struct urb *urb;
370         unsigned int pipe;
371         int err;
372
373         BT_DBG("%s", hdev->name);
374
375         if (!test_bit(HCI_RUNNING, &hdev->flags))
376                 return -EBUSY;
377
378         urb = usb_alloc_urb(0, GFP_ATOMIC);
379         if (!urb)
380                 return -ENOMEM;
381
382         /* Prepend skb with frame type */
383         *skb_push(skb, 1) = bt_cb(skb)->pkt_type;
384
385         switch (bt_cb(skb)->pkt_type) {
386         case HCI_COMMAND_PKT:
387                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
388                 if (!dr) {
389                         usb_free_urb(urb);
390                         return -ENOMEM;
391                 }
392
393                 dr->bRequestType = USB_TYPE_VENDOR;
394                 dr->bRequest     = 0;
395                 dr->wIndex       = 0;
396                 dr->wValue       = 0;
397                 dr->wLength      = __cpu_to_le16(skb->len);
398
399                 pipe = usb_sndctrlpipe(data->udev, 0x00);
400
401                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
402                                 skb->data, skb->len, bpa10x_tx_complete, skb);
403
404                 hdev->stat.cmd_tx++;
405                 break;
406
407         case HCI_ACLDATA_PKT:
408                 pipe = usb_sndbulkpipe(data->udev, 0x02);
409
410                 usb_fill_bulk_urb(urb, data->udev, pipe,
411                                 skb->data, skb->len, bpa10x_tx_complete, skb);
412
413                 hdev->stat.acl_tx++;
414                 break;
415
416         case HCI_SCODATA_PKT:
417                 pipe = usb_sndbulkpipe(data->udev, 0x02);
418
419                 usb_fill_bulk_urb(urb, data->udev, pipe,
420                                 skb->data, skb->len, bpa10x_tx_complete, skb);
421
422                 hdev->stat.sco_tx++;
423                 break;
424
425         default:
426                 return -EILSEQ;
427         }
428
429         usb_anchor_urb(urb, &data->tx_anchor);
430
431         err = usb_submit_urb(urb, GFP_ATOMIC);
432         if (err < 0) {
433                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
434                 kfree(urb->setup_packet);
435                 usb_unanchor_urb(urb);
436         }
437
438         usb_free_urb(urb);
439
440         return 0;
441 }
442
443 static void bpa10x_destruct(struct hci_dev *hdev)
444 {
445         struct bpa10x_data *data = hdev->driver_data;
446
447         BT_DBG("%s", hdev->name);
448
449         kfree(data->rx_skb[0]);
450         kfree(data->rx_skb[1]);
451         kfree(data);
452 }
453
454 static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
455 {
456         struct bpa10x_data *data;
457         struct hci_dev *hdev;
458         int err;
459
460         BT_DBG("intf %p id %p", intf, id);
461
462         if (ignore)
463                 return -ENODEV;
464
465         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
466                 return -ENODEV;
467
468         data = kzalloc(sizeof(*data), GFP_KERNEL);
469         if (!data)
470                 return -ENOMEM;
471
472         data->udev = interface_to_usbdev(intf);
473
474         init_usb_anchor(&data->tx_anchor);
475         init_usb_anchor(&data->rx_anchor);
476
477         hdev = hci_alloc_dev();
478         if (!hdev) {
479                 kfree(data);
480                 return -ENOMEM;
481         }
482
483         hdev->type = HCI_USB;
484         hdev->driver_data = data;
485
486         data->hdev = hdev;
487
488         SET_HCIDEV_DEV(hdev, &intf->dev);
489
490         hdev->open     = bpa10x_open;
491         hdev->close    = bpa10x_close;
492         hdev->flush    = bpa10x_flush;
493         hdev->send     = bpa10x_send_frame;
494         hdev->destruct = bpa10x_destruct;
495
496         hdev->owner = THIS_MODULE;
497
498         err = hci_register_dev(hdev);
499         if (err < 0) {
500                 hci_free_dev(hdev);
501                 kfree(data);
502                 return err;
503         }
504
505         usb_set_intfdata(intf, data);
506
507         return 0;
508 }
509
510 static void bpa10x_disconnect(struct usb_interface *intf)
511 {
512         struct bpa10x_data *data = usb_get_intfdata(intf);
513
514         BT_DBG("intf %p", intf);
515
516         if (!data)
517                 return;
518
519         usb_set_intfdata(intf, NULL);
520
521         hci_unregister_dev(data->hdev);
522
523         hci_free_dev(data->hdev);
524 }
525
526 static struct usb_driver bpa10x_driver = {
527         .name           = "bpa10x",
528         .probe          = bpa10x_probe,
529         .disconnect     = bpa10x_disconnect,
530         .id_table       = bpa10x_table,
531 };
532
533 static int __init bpa10x_init(void)
534 {
535         BT_INFO("Digianswer Bluetooth USB driver ver %s", VERSION);
536
537         return usb_register(&bpa10x_driver);
538 }
539
540 static void __exit bpa10x_exit(void)
541 {
542         usb_deregister(&bpa10x_driver);
543 }
544
545 module_init(bpa10x_init);
546 module_exit(bpa10x_exit);
547
548 module_param(ignore, bool, 0644);
549 MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
550
551 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
552 MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
553 MODULE_VERSION(VERSION);
554 MODULE_LICENSE("GPL");