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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 #include "hci_uart.h"
 39 
 40 #define VERSION "0.11"
 41 
 42 static const struct usb_device_id bpa10x_table[] = {
 43         /* Tektronix BPA 100/105 (Digianswer) */
 44         { USB_DEVICE(0x08fd, 0x0002) },
 45 
 46         { }     /* Terminating entry */
 47 };
 48 
 49 MODULE_DEVICE_TABLE(usb, bpa10x_table);
 50 
 51 struct bpa10x_data {
 52         struct hci_dev    *hdev;
 53         struct usb_device *udev;
 54 
 55         struct usb_anchor tx_anchor;
 56         struct usb_anchor rx_anchor;
 57 
 58         struct sk_buff *rx_skb[2];
 59 };
 60 
 61 static void bpa10x_tx_complete(struct urb *urb)
 62 {
 63         struct sk_buff *skb = urb->context;
 64         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 65 
 66         BT_DBG("%s urb %p status %d count %d", hdev->name,
 67                                         urb, urb->status, urb->actual_length);
 68 
 69         if (!test_bit(HCI_RUNNING, &hdev->flags))
 70                 goto done;
 71 
 72         if (!urb->status)
 73                 hdev->stat.byte_tx += urb->transfer_buffer_length;
 74         else
 75                 hdev->stat.err_tx++;
 76 
 77 done:
 78         kfree(urb->setup_packet);
 79 
 80         kfree_skb(skb);
 81 }
 82 
 83 #define HCI_VENDOR_HDR_SIZE 5
 84 
 85 #define HCI_RECV_VENDOR \
 86         .type = HCI_VENDOR_PKT, \
 87         .hlen = HCI_VENDOR_HDR_SIZE, \
 88         .loff = 3, \
 89         .lsize = 2, \
 90         .maxlen = HCI_MAX_FRAME_SIZE
 91 
 92 static const struct h4_recv_pkt bpa10x_recv_pkts[] = {
 93         { H4_RECV_ACL,     .recv = hci_recv_frame },
 94         { H4_RECV_SCO,     .recv = hci_recv_frame },
 95         { H4_RECV_EVENT,   .recv = hci_recv_frame },
 96         { HCI_RECV_VENDOR, .recv = hci_recv_diag  },
 97 };
 98 
 99 static void bpa10x_rx_complete(struct urb *urb)
100 {
101         struct hci_dev *hdev = urb->context;
102         struct bpa10x_data *data = hci_get_drvdata(hdev);
103         int err;
104 
105         BT_DBG("%s urb %p status %d count %d", hdev->name,
106                                         urb, urb->status, urb->actual_length);
107 
108         if (!test_bit(HCI_RUNNING, &hdev->flags))
109                 return;
110 
111         if (urb->status == 0) {
112                 bool idx = usb_pipebulk(urb->pipe);
113 
114                 data->rx_skb[idx] = h4_recv_buf(hdev, data->rx_skb[idx],
115                                                 urb->transfer_buffer,
116                                                 urb->actual_length,
117                                                 bpa10x_recv_pkts,
118                                                 ARRAY_SIZE(bpa10x_recv_pkts));
119                 if (IS_ERR(data->rx_skb[idx])) {
120                         BT_ERR("%s corrupted event packet", hdev->name);
121                         hdev->stat.err_rx++;
122                         data->rx_skb[idx] = NULL;
123                 }
124         }
125 
126         usb_anchor_urb(urb, &data->rx_anchor);
127 
128         err = usb_submit_urb(urb, GFP_ATOMIC);
129         if (err < 0) {
130                 BT_ERR("%s urb %p failed to resubmit (%d)",
131                                                 hdev->name, urb, -err);
132                 usb_unanchor_urb(urb);
133         }
134 }
135 
136 static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
137 {
138         struct bpa10x_data *data = hci_get_drvdata(hdev);
139         struct urb *urb;
140         unsigned char *buf;
141         unsigned int pipe;
142         int err, size = 16;
143 
144         BT_DBG("%s", hdev->name);
145 
146         urb = usb_alloc_urb(0, GFP_KERNEL);
147         if (!urb)
148                 return -ENOMEM;
149 
150         buf = kmalloc(size, GFP_KERNEL);
151         if (!buf) {
152                 usb_free_urb(urb);
153                 return -ENOMEM;
154         }
155 
156         pipe = usb_rcvintpipe(data->udev, 0x81);
157 
158         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
159                                                 bpa10x_rx_complete, hdev, 1);
160 
161         urb->transfer_flags |= URB_FREE_BUFFER;
162 
163         usb_anchor_urb(urb, &data->rx_anchor);
164 
165         err = usb_submit_urb(urb, GFP_KERNEL);
166         if (err < 0) {
167                 BT_ERR("%s urb %p submission failed (%d)",
168                                                 hdev->name, urb, -err);
169                 usb_unanchor_urb(urb);
170         }
171 
172         usb_free_urb(urb);
173 
174         return err;
175 }
176 
177 static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
178 {
179         struct bpa10x_data *data = hci_get_drvdata(hdev);
180         struct urb *urb;
181         unsigned char *buf;
182         unsigned int pipe;
183         int err, size = 64;
184 
185         BT_DBG("%s", hdev->name);
186 
187         urb = usb_alloc_urb(0, GFP_KERNEL);
188         if (!urb)
189                 return -ENOMEM;
190 
191         buf = kmalloc(size, GFP_KERNEL);
192         if (!buf) {
193                 usb_free_urb(urb);
194                 return -ENOMEM;
195         }
196 
197         pipe = usb_rcvbulkpipe(data->udev, 0x82);
198 
199         usb_fill_bulk_urb(urb, data->udev, pipe,
200                                         buf, size, bpa10x_rx_complete, hdev);
201 
202         urb->transfer_flags |= URB_FREE_BUFFER;
203 
204         usb_anchor_urb(urb, &data->rx_anchor);
205 
206         err = usb_submit_urb(urb, GFP_KERNEL);
207         if (err < 0) {
208                 BT_ERR("%s urb %p submission failed (%d)",
209                                                 hdev->name, urb, -err);
210                 usb_unanchor_urb(urb);
211         }
212 
213         usb_free_urb(urb);
214 
215         return err;
216 }
217 
218 static int bpa10x_open(struct hci_dev *hdev)
219 {
220         struct bpa10x_data *data = hci_get_drvdata(hdev);
221         int err;
222 
223         BT_DBG("%s", hdev->name);
224 
225         err = bpa10x_submit_intr_urb(hdev);
226         if (err < 0)
227                 goto error;
228 
229         err = bpa10x_submit_bulk_urb(hdev);
230         if (err < 0)
231                 goto error;
232 
233         return 0;
234 
235 error:
236         usb_kill_anchored_urbs(&data->rx_anchor);
237 
238         return err;
239 }
240 
241 static int bpa10x_close(struct hci_dev *hdev)
242 {
243         struct bpa10x_data *data = hci_get_drvdata(hdev);
244 
245         BT_DBG("%s", hdev->name);
246 
247         usb_kill_anchored_urbs(&data->rx_anchor);
248 
249         return 0;
250 }
251 
252 static int bpa10x_flush(struct hci_dev *hdev)
253 {
254         struct bpa10x_data *data = hci_get_drvdata(hdev);
255 
256         BT_DBG("%s", hdev->name);
257 
258         usb_kill_anchored_urbs(&data->tx_anchor);
259 
260         return 0;
261 }
262 
263 static int bpa10x_setup(struct hci_dev *hdev)
264 {
265         const u8 req[] = { 0x07 };
266         struct sk_buff *skb;
267 
268         BT_DBG("%s", hdev->name);
269 
270         /* Read revision string */
271         skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
272         if (IS_ERR(skb))
273                 return PTR_ERR(skb);
274 
275         BT_INFO("%s: %s", hdev->name, (char *)(skb->data + 1));
276 
277         kfree_skb(skb);
278         return 0;
279 }
280 
281 static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
282 {
283         struct bpa10x_data *data = hci_get_drvdata(hdev);
284         struct usb_ctrlrequest *dr;
285         struct urb *urb;
286         unsigned int pipe;
287         int err;
288 
289         BT_DBG("%s", hdev->name);
290 
291         skb->dev = (void *) hdev;
292 
293         urb = usb_alloc_urb(0, GFP_ATOMIC);
294         if (!urb)
295                 return -ENOMEM;
296 
297         /* Prepend skb with frame type */
298         *skb_push(skb, 1) = hci_skb_pkt_type(skb);
299 
300         switch (hci_skb_pkt_type(skb)) {
301         case HCI_COMMAND_PKT:
302                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
303                 if (!dr) {
304                         usb_free_urb(urb);
305                         return -ENOMEM;
306                 }
307 
308                 dr->bRequestType = USB_TYPE_VENDOR;
309                 dr->bRequest     = 0;
310                 dr->wIndex       = 0;
311                 dr->wValue       = 0;
312                 dr->wLength      = __cpu_to_le16(skb->len);
313 
314                 pipe = usb_sndctrlpipe(data->udev, 0x00);
315 
316                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
317                                 skb->data, skb->len, bpa10x_tx_complete, skb);
318 
319                 hdev->stat.cmd_tx++;
320                 break;
321 
322         case HCI_ACLDATA_PKT:
323                 pipe = usb_sndbulkpipe(data->udev, 0x02);
324 
325                 usb_fill_bulk_urb(urb, data->udev, pipe,
326                                 skb->data, skb->len, bpa10x_tx_complete, skb);
327 
328                 hdev->stat.acl_tx++;
329                 break;
330 
331         case HCI_SCODATA_PKT:
332                 pipe = usb_sndbulkpipe(data->udev, 0x02);
333 
334                 usb_fill_bulk_urb(urb, data->udev, pipe,
335                                 skb->data, skb->len, bpa10x_tx_complete, skb);
336 
337                 hdev->stat.sco_tx++;
338                 break;
339 
340         default:
341                 usb_free_urb(urb);
342                 return -EILSEQ;
343         }
344 
345         usb_anchor_urb(urb, &data->tx_anchor);
346 
347         err = usb_submit_urb(urb, GFP_ATOMIC);
348         if (err < 0) {
349                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
350                 kfree(urb->setup_packet);
351                 usb_unanchor_urb(urb);
352         }
353 
354         usb_free_urb(urb);
355 
356         return 0;
357 }
358 
359 static int bpa10x_set_diag(struct hci_dev *hdev, bool enable)
360 {
361         const u8 req[] = { 0x00, enable };
362         struct sk_buff *skb;
363 
364         BT_DBG("%s", hdev->name);
365 
366         if (!test_bit(HCI_RUNNING, &hdev->flags))
367                 return -ENETDOWN;
368 
369         /* Enable sniffer operation */
370         skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
371         if (IS_ERR(skb))
372                 return PTR_ERR(skb);
373 
374         kfree_skb(skb);
375         return 0;
376 }
377 
378 static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
379 {
380         struct bpa10x_data *data;
381         struct hci_dev *hdev;
382         int err;
383 
384         BT_DBG("intf %p id %p", intf, id);
385 
386         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
387                 return -ENODEV;
388 
389         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
390         if (!data)
391                 return -ENOMEM;
392 
393         data->udev = interface_to_usbdev(intf);
394 
395         init_usb_anchor(&data->tx_anchor);
396         init_usb_anchor(&data->rx_anchor);
397 
398         hdev = hci_alloc_dev();
399         if (!hdev)
400                 return -ENOMEM;
401 
402         hdev->bus = HCI_USB;
403         hci_set_drvdata(hdev, data);
404 
405         data->hdev = hdev;
406 
407         SET_HCIDEV_DEV(hdev, &intf->dev);
408 
409         hdev->open     = bpa10x_open;
410         hdev->close    = bpa10x_close;
411         hdev->flush    = bpa10x_flush;
412         hdev->setup    = bpa10x_setup;
413         hdev->send     = bpa10x_send_frame;
414         hdev->set_diag = bpa10x_set_diag;
415 
416         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
417 
418         err = hci_register_dev(hdev);
419         if (err < 0) {
420                 hci_free_dev(hdev);
421                 return err;
422         }
423 
424         usb_set_intfdata(intf, data);
425 
426         return 0;
427 }
428 
429 static void bpa10x_disconnect(struct usb_interface *intf)
430 {
431         struct bpa10x_data *data = usb_get_intfdata(intf);
432 
433         BT_DBG("intf %p", intf);
434 
435         if (!data)
436                 return;
437 
438         usb_set_intfdata(intf, NULL);
439 
440         hci_unregister_dev(data->hdev);
441 
442         hci_free_dev(data->hdev);
443         kfree_skb(data->rx_skb[0]);
444         kfree_skb(data->rx_skb[1]);
445 }
446 
447 static struct usb_driver bpa10x_driver = {
448         .name           = "bpa10x",
449         .probe          = bpa10x_probe,
450         .disconnect     = bpa10x_disconnect,
451         .id_table       = bpa10x_table,
452         .disable_hub_initiated_lpm = 1,
453 };
454 
455 module_usb_driver(bpa10x_driver);
456 
457 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
458 MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
459 MODULE_VERSION(VERSION);
460 MODULE_LICENSE("GPL");
461 

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