tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
45static int ignore = 0;
46
47static struct usb_device_id bpa10x_table[] = {
48 /* Tektronix BPA 100/105 (Digianswer) */
49 { USB_DEVICE(0x08fd, 0x0002) },
50
51 { } /* Terminating entry */
52};
53
54MODULE_DEVICE_TABLE(usb, bpa10x_table);
55
56struct 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
68struct hci_vendor_hdr {
69 __u8 type;
70 __le16 snum;
71 __le16 dlen;
72} __attribute__ ((packed));
73
74static 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
174static 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
190done:
191 kfree(urb->setup_packet);
192
193 kfree_skb(skb);
194}
195
196static 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
227static 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
269static 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
311static 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
331error:
332 usb_kill_anchored_urbs(&data->rx_anchor);
333
334 clear_bit(HCI_RUNNING, &hdev->flags);
335
336 return err;
337}
338
339static 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
353static 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
364static 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
443static 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
454static 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
510static 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
526static struct usb_driver bpa10x_driver = {
527 .name = "bpa10x",
528 .probe = bpa10x_probe,
529 .disconnect = bpa10x_disconnect,
530 .id_table = bpa10x_table,
531};
532
533static 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
540static void __exit bpa10x_exit(void)
541{
542 usb_deregister(&bpa10x_driver);
543}
544
545module_init(bpa10x_init);
546module_exit(bpa10x_exit);
547
548module_param(ignore, bool, 0644);
549MODULE_PARM_DESC(ignore, "Ignore devices from the matching table");
550
551MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
552MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
553MODULE_VERSION(VERSION);
554MODULE_LICENSE("GPL");