Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/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 const 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 = hci_get_drvdata(hdev);
 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                         data->rx_skb[queue] = skb;
133 
134                         scb = (void *) skb->cb;
135                         scb->type = type;
136                         scb->expect = len;
137                 } else {
138                         /* Continuation */
139 
140                         scb = (void *) skb->cb;
141                         len = scb->expect;
142                 }
143 
144                 len = min(len, count);
145 
146                 memcpy(skb_put(skb, len), buf, len);
147 
148                 scb->expect -= len;
149 
150                 if (scb->expect == 0) {
151                         /* Complete frame */
152 
153                         data->rx_skb[queue] = NULL;
154 
155                         bt_cb(skb)->pkt_type = scb->type;
156                         hci_recv_frame(hdev, skb);
157                 }
158 
159                 count -= len; buf += len;
160         }
161 
162         return 0;
163 }
164 
165 static void bpa10x_tx_complete(struct urb *urb)
166 {
167         struct sk_buff *skb = urb->context;
168         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
169 
170         BT_DBG("%s urb %p status %d count %d", hdev->name,
171                                         urb, urb->status, urb->actual_length);
172 
173         if (!test_bit(HCI_RUNNING, &hdev->flags))
174                 goto done;
175 
176         if (!urb->status)
177                 hdev->stat.byte_tx += urb->transfer_buffer_length;
178         else
179                 hdev->stat.err_tx++;
180 
181 done:
182         kfree(urb->setup_packet);
183 
184         kfree_skb(skb);
185 }
186 
187 static void bpa10x_rx_complete(struct urb *urb)
188 {
189         struct hci_dev *hdev = urb->context;
190         struct bpa10x_data *data = hci_get_drvdata(hdev);
191         int err;
192 
193         BT_DBG("%s urb %p status %d count %d", hdev->name,
194                                         urb, urb->status, urb->actual_length);
195 
196         if (!test_bit(HCI_RUNNING, &hdev->flags))
197                 return;
198 
199         if (urb->status == 0) {
200                 if (bpa10x_recv(hdev, usb_pipebulk(urb->pipe),
201                                                 urb->transfer_buffer,
202                                                 urb->actual_length) < 0) {
203                         BT_ERR("%s corrupted event packet", hdev->name);
204                         hdev->stat.err_rx++;
205                 }
206         }
207 
208         usb_anchor_urb(urb, &data->rx_anchor);
209 
210         err = usb_submit_urb(urb, GFP_ATOMIC);
211         if (err < 0) {
212                 BT_ERR("%s urb %p failed to resubmit (%d)",
213                                                 hdev->name, urb, -err);
214                 usb_unanchor_urb(urb);
215         }
216 }
217 
218 static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
219 {
220         struct bpa10x_data *data = hci_get_drvdata(hdev);
221         struct urb *urb;
222         unsigned char *buf;
223         unsigned int pipe;
224         int err, size = 16;
225 
226         BT_DBG("%s", hdev->name);
227 
228         urb = usb_alloc_urb(0, GFP_KERNEL);
229         if (!urb)
230                 return -ENOMEM;
231 
232         buf = kmalloc(size, GFP_KERNEL);
233         if (!buf) {
234                 usb_free_urb(urb);
235                 return -ENOMEM;
236         }
237 
238         pipe = usb_rcvintpipe(data->udev, 0x81);
239 
240         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
241                                                 bpa10x_rx_complete, hdev, 1);
242 
243         urb->transfer_flags |= URB_FREE_BUFFER;
244 
245         usb_anchor_urb(urb, &data->rx_anchor);
246 
247         err = usb_submit_urb(urb, GFP_KERNEL);
248         if (err < 0) {
249                 BT_ERR("%s urb %p submission failed (%d)",
250                                                 hdev->name, urb, -err);
251                 usb_unanchor_urb(urb);
252         }
253 
254         usb_free_urb(urb);
255 
256         return err;
257 }
258 
259 static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
260 {
261         struct bpa10x_data *data = hci_get_drvdata(hdev);
262         struct urb *urb;
263         unsigned char *buf;
264         unsigned int pipe;
265         int err, size = 64;
266 
267         BT_DBG("%s", hdev->name);
268 
269         urb = usb_alloc_urb(0, GFP_KERNEL);
270         if (!urb)
271                 return -ENOMEM;
272 
273         buf = kmalloc(size, GFP_KERNEL);
274         if (!buf) {
275                 usb_free_urb(urb);
276                 return -ENOMEM;
277         }
278 
279         pipe = usb_rcvbulkpipe(data->udev, 0x82);
280 
281         usb_fill_bulk_urb(urb, data->udev, pipe,
282                                         buf, size, bpa10x_rx_complete, hdev);
283 
284         urb->transfer_flags |= URB_FREE_BUFFER;
285 
286         usb_anchor_urb(urb, &data->rx_anchor);
287 
288         err = usb_submit_urb(urb, GFP_KERNEL);
289         if (err < 0) {
290                 BT_ERR("%s urb %p submission failed (%d)",
291                                                 hdev->name, urb, -err);
292                 usb_unanchor_urb(urb);
293         }
294 
295         usb_free_urb(urb);
296 
297         return err;
298 }
299 
300 static int bpa10x_open(struct hci_dev *hdev)
301 {
302         struct bpa10x_data *data = hci_get_drvdata(hdev);
303         int err;
304 
305         BT_DBG("%s", hdev->name);
306 
307         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
308                 return 0;
309 
310         err = bpa10x_submit_intr_urb(hdev);
311         if (err < 0)
312                 goto error;
313 
314         err = bpa10x_submit_bulk_urb(hdev);
315         if (err < 0)
316                 goto error;
317 
318         return 0;
319 
320 error:
321         usb_kill_anchored_urbs(&data->rx_anchor);
322 
323         clear_bit(HCI_RUNNING, &hdev->flags);
324 
325         return err;
326 }
327 
328 static int bpa10x_close(struct hci_dev *hdev)
329 {
330         struct bpa10x_data *data = hci_get_drvdata(hdev);
331 
332         BT_DBG("%s", hdev->name);
333 
334         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
335                 return 0;
336 
337         usb_kill_anchored_urbs(&data->rx_anchor);
338 
339         return 0;
340 }
341 
342 static int bpa10x_flush(struct hci_dev *hdev)
343 {
344         struct bpa10x_data *data = hci_get_drvdata(hdev);
345 
346         BT_DBG("%s", hdev->name);
347 
348         usb_kill_anchored_urbs(&data->tx_anchor);
349 
350         return 0;
351 }
352 
353 static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
354 {
355         struct bpa10x_data *data = hci_get_drvdata(hdev);
356         struct usb_ctrlrequest *dr;
357         struct urb *urb;
358         unsigned int pipe;
359         int err;
360 
361         BT_DBG("%s", hdev->name);
362 
363         if (!test_bit(HCI_RUNNING, &hdev->flags))
364                 return -EBUSY;
365 
366         skb->dev = (void *) hdev;
367 
368         urb = usb_alloc_urb(0, GFP_ATOMIC);
369         if (!urb)
370                 return -ENOMEM;
371 
372         /* Prepend skb with frame type */
373         *skb_push(skb, 1) = bt_cb(skb)->pkt_type;
374 
375         switch (bt_cb(skb)->pkt_type) {
376         case HCI_COMMAND_PKT:
377                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
378                 if (!dr) {
379                         usb_free_urb(urb);
380                         return -ENOMEM;
381                 }
382 
383                 dr->bRequestType = USB_TYPE_VENDOR;
384                 dr->bRequest     = 0;
385                 dr->wIndex       = 0;
386                 dr->wValue       = 0;
387                 dr->wLength      = __cpu_to_le16(skb->len);
388 
389                 pipe = usb_sndctrlpipe(data->udev, 0x00);
390 
391                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
392                                 skb->data, skb->len, bpa10x_tx_complete, skb);
393 
394                 hdev->stat.cmd_tx++;
395                 break;
396 
397         case HCI_ACLDATA_PKT:
398                 pipe = usb_sndbulkpipe(data->udev, 0x02);
399 
400                 usb_fill_bulk_urb(urb, data->udev, pipe,
401                                 skb->data, skb->len, bpa10x_tx_complete, skb);
402 
403                 hdev->stat.acl_tx++;
404                 break;
405 
406         case HCI_SCODATA_PKT:
407                 pipe = usb_sndbulkpipe(data->udev, 0x02);
408 
409                 usb_fill_bulk_urb(urb, data->udev, pipe,
410                                 skb->data, skb->len, bpa10x_tx_complete, skb);
411 
412                 hdev->stat.sco_tx++;
413                 break;
414 
415         default:
416                 usb_free_urb(urb);
417                 return -EILSEQ;
418         }
419 
420         usb_anchor_urb(urb, &data->tx_anchor);
421 
422         err = usb_submit_urb(urb, GFP_ATOMIC);
423         if (err < 0) {
424                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
425                 kfree(urb->setup_packet);
426                 usb_unanchor_urb(urb);
427         }
428 
429         usb_free_urb(urb);
430 
431         return 0;
432 }
433 
434 static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
435 {
436         struct bpa10x_data *data;
437         struct hci_dev *hdev;
438         int err;
439 
440         BT_DBG("intf %p id %p", intf, id);
441 
442         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
443                 return -ENODEV;
444 
445         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
446         if (!data)
447                 return -ENOMEM;
448 
449         data->udev = interface_to_usbdev(intf);
450 
451         init_usb_anchor(&data->tx_anchor);
452         init_usb_anchor(&data->rx_anchor);
453 
454         hdev = hci_alloc_dev();
455         if (!hdev)
456                 return -ENOMEM;
457 
458         hdev->bus = HCI_USB;
459         hci_set_drvdata(hdev, data);
460 
461         data->hdev = hdev;
462 
463         SET_HCIDEV_DEV(hdev, &intf->dev);
464 
465         hdev->open     = bpa10x_open;
466         hdev->close    = bpa10x_close;
467         hdev->flush    = bpa10x_flush;
468         hdev->send     = bpa10x_send_frame;
469 
470         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
471 
472         err = hci_register_dev(hdev);
473         if (err < 0) {
474                 hci_free_dev(hdev);
475                 return err;
476         }
477 
478         usb_set_intfdata(intf, data);
479 
480         return 0;
481 }
482 
483 static void bpa10x_disconnect(struct usb_interface *intf)
484 {
485         struct bpa10x_data *data = usb_get_intfdata(intf);
486 
487         BT_DBG("intf %p", intf);
488 
489         if (!data)
490                 return;
491 
492         usb_set_intfdata(intf, NULL);
493 
494         hci_unregister_dev(data->hdev);
495 
496         hci_free_dev(data->hdev);
497         kfree_skb(data->rx_skb[0]);
498         kfree_skb(data->rx_skb[1]);
499 }
500 
501 static struct usb_driver bpa10x_driver = {
502         .name           = "bpa10x",
503         .probe          = bpa10x_probe,
504         .disconnect     = bpa10x_disconnect,
505         .id_table       = bpa10x_table,
506         .disable_hub_initiated_lpm = 1,
507 };
508 
509 module_usb_driver(bpa10x_driver);
510 
511 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
512 MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
513 MODULE_VERSION(VERSION);
514 MODULE_LICENSE("GPL");
515 

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