tegra: Make tegra_vi01_device accessible
[linux-2.6.git] / 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 #define VERSION "0.10"
39
40 static struct usb_device_id bpa10x_table[] = {
41         /* Tektronix BPA 100/105 (Digianswer) */
42         { USB_DEVICE(0x08fd, 0x0002) },
43
44         { }     /* Terminating entry */
45 };
46
47 MODULE_DEVICE_TABLE(usb, bpa10x_table);
48
49 struct bpa10x_data {
50         struct hci_dev    *hdev;
51         struct usb_device *udev;
52
53         struct usb_anchor tx_anchor;
54         struct usb_anchor rx_anchor;
55
56         struct sk_buff *rx_skb[2];
57 };
58
59 #define HCI_VENDOR_HDR_SIZE 5
60
61 struct hci_vendor_hdr {
62         __u8    type;
63         __le16  snum;
64         __le16  dlen;
65 } __packed;
66
67 static int bpa10x_recv(struct hci_dev *hdev, int queue, void *buf, int count)
68 {
69         struct bpa10x_data *data = hdev->driver_data;
70
71         BT_DBG("%s queue %d buffer %p count %d", hdev->name,
72                                                         queue, buf, count);
73
74         if (queue < 0 || queue > 1)
75                 return -EILSEQ;
76
77         hdev->stat.byte_rx += count;
78
79         while (count) {
80                 struct sk_buff *skb = data->rx_skb[queue];
81                 struct { __u8 type; int expect; } *scb;
82                 int type, len = 0;
83
84                 if (!skb) {
85                         /* Start of the frame */
86
87                         type = *((__u8 *) buf);
88                         count--; buf++;
89
90                         switch (type) {
91                         case HCI_EVENT_PKT:
92                                 if (count >= HCI_EVENT_HDR_SIZE) {
93                                         struct hci_event_hdr *h = buf;
94                                         len = HCI_EVENT_HDR_SIZE + h->plen;
95                                 } else
96                                         return -EILSEQ;
97                                 break;
98
99                         case HCI_ACLDATA_PKT:
100                                 if (count >= HCI_ACL_HDR_SIZE) {
101                                         struct hci_acl_hdr *h = buf;
102                                         len = HCI_ACL_HDR_SIZE +
103                                                         __le16_to_cpu(h->dlen);
104                                 } else
105                                         return -EILSEQ;
106                                 break;
107
108                         case HCI_SCODATA_PKT:
109                                 if (count >= HCI_SCO_HDR_SIZE) {
110                                         struct hci_sco_hdr *h = buf;
111                                         len = HCI_SCO_HDR_SIZE + h->dlen;
112                                 } else
113                                         return -EILSEQ;
114                                 break;
115
116                         case HCI_VENDOR_PKT:
117                                 if (count >= HCI_VENDOR_HDR_SIZE) {
118                                         struct hci_vendor_hdr *h = buf;
119                                         len = HCI_VENDOR_HDR_SIZE +
120                                                         __le16_to_cpu(h->dlen);
121                                 } else
122                                         return -EILSEQ;
123                                 break;
124                         }
125
126                         skb = bt_skb_alloc(len, GFP_ATOMIC);
127                         if (!skb) {
128                                 BT_ERR("%s no memory for packet", hdev->name);
129                                 return -ENOMEM;
130                         }
131
132                         skb->dev = (void *) hdev;
133
134                         data->rx_skb[queue] = skb;
135
136                         scb = (void *) skb->cb;
137                         scb->type = type;
138                         scb->expect = len;
139                 } else {
140                         /* Continuation */
141
142                         scb = (void *) skb->cb;
143                         len = scb->expect;
144                 }
145
146                 len = min(len, count);
147
148                 memcpy(skb_put(skb, len), buf, len);
149
150                 scb->expect -= len;
151
152                 if (scb->expect == 0) {
153                         /* Complete frame */
154
155                         data->rx_skb[queue] = NULL;
156
157                         bt_cb(skb)->pkt_type = scb->type;
158                         hci_recv_frame(skb);
159                 }
160
161                 count -= len; buf += len;
162         }
163
164         return 0;
165 }
166
167 static void bpa10x_tx_complete(struct urb *urb)
168 {
169         struct sk_buff *skb = urb->context;
170         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
171
172         BT_DBG("%s urb %p status %d count %d", hdev->name,
173                                         urb, urb->status, urb->actual_length);
174
175         if (!test_bit(HCI_RUNNING, &hdev->flags))
176                 goto done;
177
178         if (!urb->status)
179                 hdev->stat.byte_tx += urb->transfer_buffer_length;
180         else
181                 hdev->stat.err_tx++;
182
183 done:
184         kfree(urb->setup_packet);
185
186         kfree_skb(skb);
187 }
188
189 static void bpa10x_rx_complete(struct urb *urb)
190 {
191         struct hci_dev *hdev = urb->context;
192         struct bpa10x_data *data = hdev->driver_data;
193         int err;
194
195         BT_DBG("%s urb %p status %d count %d", hdev->name,
196                                         urb, urb->status, urb->actual_length);
197
198         if (!test_bit(HCI_RUNNING, &hdev->flags))
199                 return;
200
201         if (urb->status == 0) {
202                 if (bpa10x_recv(hdev, usb_pipebulk(urb->pipe),
203                                                 urb->transfer_buffer,
204                                                 urb->actual_length) < 0) {
205                         BT_ERR("%s corrupted event packet", hdev->name);
206                         hdev->stat.err_rx++;
207                 }
208         }
209
210         usb_anchor_urb(urb, &data->rx_anchor);
211
212         err = usb_submit_urb(urb, GFP_ATOMIC);
213         if (err < 0) {
214                 BT_ERR("%s urb %p failed to resubmit (%d)",
215                                                 hdev->name, urb, -err);
216                 usb_unanchor_urb(urb);
217         }
218 }
219
220 static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
221 {
222         struct bpa10x_data *data = hdev->driver_data;
223         struct urb *urb;
224         unsigned char *buf;
225         unsigned int pipe;
226         int err, size = 16;
227
228         BT_DBG("%s", hdev->name);
229
230         urb = usb_alloc_urb(0, GFP_KERNEL);
231         if (!urb)
232                 return -ENOMEM;
233
234         buf = kmalloc(size, GFP_KERNEL);
235         if (!buf) {
236                 usb_free_urb(urb);
237                 return -ENOMEM;
238         }
239
240         pipe = usb_rcvintpipe(data->udev, 0x81);
241
242         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
243                                                 bpa10x_rx_complete, hdev, 1);
244
245         urb->transfer_flags |= URB_FREE_BUFFER;
246
247         usb_anchor_urb(urb, &data->rx_anchor);
248
249         err = usb_submit_urb(urb, GFP_KERNEL);
250         if (err < 0) {
251                 BT_ERR("%s urb %p submission failed (%d)",
252                                                 hdev->name, urb, -err);
253                 usb_unanchor_urb(urb);
254         }
255
256         usb_free_urb(urb);
257
258         return err;
259 }
260
261 static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
262 {
263         struct bpa10x_data *data = hdev->driver_data;
264         struct urb *urb;
265         unsigned char *buf;
266         unsigned int pipe;
267         int err, size = 64;
268
269         BT_DBG("%s", hdev->name);
270
271         urb = usb_alloc_urb(0, GFP_KERNEL);
272         if (!urb)
273                 return -ENOMEM;
274
275         buf = kmalloc(size, GFP_KERNEL);
276         if (!buf) {
277                 usb_free_urb(urb);
278                 return -ENOMEM;
279         }
280
281         pipe = usb_rcvbulkpipe(data->udev, 0x82);
282
283         usb_fill_bulk_urb(urb, data->udev, pipe,
284                                         buf, size, bpa10x_rx_complete, hdev);
285
286         urb->transfer_flags |= URB_FREE_BUFFER;
287
288         usb_anchor_urb(urb, &data->rx_anchor);
289
290         err = usb_submit_urb(urb, GFP_KERNEL);
291         if (err < 0) {
292                 BT_ERR("%s urb %p submission failed (%d)",
293                                                 hdev->name, urb, -err);
294                 usb_unanchor_urb(urb);
295         }
296
297         usb_free_urb(urb);
298
299         return err;
300 }
301
302 static int bpa10x_open(struct hci_dev *hdev)
303 {
304         struct bpa10x_data *data = hdev->driver_data;
305         int err;
306
307         BT_DBG("%s", hdev->name);
308
309         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
310                 return 0;
311
312         err = bpa10x_submit_intr_urb(hdev);
313         if (err < 0)
314                 goto error;
315
316         err = bpa10x_submit_bulk_urb(hdev);
317         if (err < 0)
318                 goto error;
319
320         return 0;
321
322 error:
323         usb_kill_anchored_urbs(&data->rx_anchor);
324
325         clear_bit(HCI_RUNNING, &hdev->flags);
326
327         return err;
328 }
329
330 static int bpa10x_close(struct hci_dev *hdev)
331 {
332         struct bpa10x_data *data = hdev->driver_data;
333
334         BT_DBG("%s", hdev->name);
335
336         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
337                 return 0;
338
339         usb_kill_anchored_urbs(&data->rx_anchor);
340
341         return 0;
342 }
343
344 static int bpa10x_flush(struct hci_dev *hdev)
345 {
346         struct bpa10x_data *data = hdev->driver_data;
347
348         BT_DBG("%s", hdev->name);
349
350         usb_kill_anchored_urbs(&data->tx_anchor);
351
352         return 0;
353 }
354
355 static int bpa10x_send_frame(struct sk_buff *skb)
356 {
357         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
358         struct bpa10x_data *data = hdev->driver_data;
359         struct usb_ctrlrequest *dr;
360         struct urb *urb;
361         unsigned int pipe;
362         int err;
363
364         BT_DBG("%s", hdev->name);
365
366         if (!test_bit(HCI_RUNNING, &hdev->flags))
367                 return -EBUSY;
368
369         urb = usb_alloc_urb(0, GFP_ATOMIC);
370         if (!urb)
371                 return -ENOMEM;
372
373         /* Prepend skb with frame type */
374         *skb_push(skb, 1) = bt_cb(skb)->pkt_type;
375
376         switch (bt_cb(skb)->pkt_type) {
377         case HCI_COMMAND_PKT:
378                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
379                 if (!dr) {
380                         usb_free_urb(urb);
381                         return -ENOMEM;
382                 }
383
384                 dr->bRequestType = USB_TYPE_VENDOR;
385                 dr->bRequest     = 0;
386                 dr->wIndex       = 0;
387                 dr->wValue       = 0;
388                 dr->wLength      = __cpu_to_le16(skb->len);
389
390                 pipe = usb_sndctrlpipe(data->udev, 0x00);
391
392                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
393                                 skb->data, skb->len, bpa10x_tx_complete, skb);
394
395                 hdev->stat.cmd_tx++;
396                 break;
397
398         case HCI_ACLDATA_PKT:
399                 pipe = usb_sndbulkpipe(data->udev, 0x02);
400
401                 usb_fill_bulk_urb(urb, data->udev, pipe,
402                                 skb->data, skb->len, bpa10x_tx_complete, skb);
403
404                 hdev->stat.acl_tx++;
405                 break;
406
407         case HCI_SCODATA_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.sco_tx++;
414                 break;
415
416         default:
417                 usb_free_urb(urb);
418                 return -EILSEQ;
419         }
420
421         usb_anchor_urb(urb, &data->tx_anchor);
422
423         err = usb_submit_urb(urb, GFP_ATOMIC);
424         if (err < 0) {
425                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
426                 kfree(urb->setup_packet);
427                 usb_unanchor_urb(urb);
428         }
429
430         usb_free_urb(urb);
431
432         return 0;
433 }
434
435 static void bpa10x_destruct(struct hci_dev *hdev)
436 {
437         struct bpa10x_data *data = hdev->driver_data;
438
439         BT_DBG("%s", hdev->name);
440
441         kfree_skb(data->rx_skb[0]);
442         kfree_skb(data->rx_skb[1]);
443         kfree(data);
444 }
445
446 static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
447 {
448         struct bpa10x_data *data;
449         struct hci_dev *hdev;
450         int err;
451
452         BT_DBG("intf %p id %p", intf, id);
453
454         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
455                 return -ENODEV;
456
457         data = kzalloc(sizeof(*data), GFP_KERNEL);
458         if (!data)
459                 return -ENOMEM;
460
461         data->udev = interface_to_usbdev(intf);
462
463         init_usb_anchor(&data->tx_anchor);
464         init_usb_anchor(&data->rx_anchor);
465
466         hdev = hci_alloc_dev();
467         if (!hdev) {
468                 kfree(data);
469                 return -ENOMEM;
470         }
471
472         hdev->bus = HCI_USB;
473         hdev->driver_data = data;
474
475         data->hdev = hdev;
476
477         SET_HCIDEV_DEV(hdev, &intf->dev);
478
479         hdev->open     = bpa10x_open;
480         hdev->close    = bpa10x_close;
481         hdev->flush    = bpa10x_flush;
482         hdev->send     = bpa10x_send_frame;
483         hdev->destruct = bpa10x_destruct;
484
485         hdev->owner = THIS_MODULE;
486
487         set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
488
489         err = hci_register_dev(hdev);
490         if (err < 0) {
491                 hci_free_dev(hdev);
492                 kfree(data);
493                 return err;
494         }
495
496         usb_set_intfdata(intf, data);
497
498         return 0;
499 }
500
501 static void bpa10x_disconnect(struct usb_interface *intf)
502 {
503         struct bpa10x_data *data = usb_get_intfdata(intf);
504
505         BT_DBG("intf %p", intf);
506
507         if (!data)
508                 return;
509
510         usb_set_intfdata(intf, NULL);
511
512         hci_unregister_dev(data->hdev);
513
514         hci_free_dev(data->hdev);
515 }
516
517 static struct usb_driver bpa10x_driver = {
518         .name           = "bpa10x",
519         .probe          = bpa10x_probe,
520         .disconnect     = bpa10x_disconnect,
521         .id_table       = bpa10x_table,
522 };
523
524 static int __init bpa10x_init(void)
525 {
526         BT_INFO("Digianswer Bluetooth USB driver ver %s", VERSION);
527
528         return usb_register(&bpa10x_driver);
529 }
530
531 static void __exit bpa10x_exit(void)
532 {
533         usb_deregister(&bpa10x_driver);
534 }
535
536 module_init(bpa10x_init);
537 module_exit(bpa10x_exit);
538
539 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
540 MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
541 MODULE_VERSION(VERSION);
542 MODULE_LICENSE("GPL");