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 "h4_recv.h"
39
40#define VERSION "0.11"
41
42static const struct usb_device_id bpa10x_table[] = {
43 /* Tektronix BPA 100/105 (Digianswer) */
44 { USB_DEVICE(0x08fd, 0x0002) },
45
46 { } /* Terminating entry */
47};
48
49MODULE_DEVICE_TABLE(usb, bpa10x_table);
50
51struct 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
61static 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
77done:
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
92static 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
99static 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_dev_err(hdev, "corrupted event packet");
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_dev_err(hdev, "urb %p failed to resubmit (%d)", urb, -err);
131 usb_unanchor_urb(urb);
132 }
133}
134
135static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
136{
137 struct bpa10x_data *data = hci_get_drvdata(hdev);
138 struct urb *urb;
139 unsigned char *buf;
140 unsigned int pipe;
141 int err, size = 16;
142
143 BT_DBG("%s", hdev->name);
144
145 urb = usb_alloc_urb(0, GFP_KERNEL);
146 if (!urb)
147 return -ENOMEM;
148
149 buf = kmalloc(size, GFP_KERNEL);
150 if (!buf) {
151 usb_free_urb(urb);
152 return -ENOMEM;
153 }
154
155 pipe = usb_rcvintpipe(data->udev, 0x81);
156
157 usb_fill_int_urb(urb, data->udev, pipe, buf, size,
158 bpa10x_rx_complete, hdev, 1);
159
160 urb->transfer_flags |= URB_FREE_BUFFER;
161
162 usb_anchor_urb(urb, &data->rx_anchor);
163
164 err = usb_submit_urb(urb, GFP_KERNEL);
165 if (err < 0) {
166 bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err);
167 usb_unanchor_urb(urb);
168 }
169
170 usb_free_urb(urb);
171
172 return err;
173}
174
175static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
176{
177 struct bpa10x_data *data = hci_get_drvdata(hdev);
178 struct urb *urb;
179 unsigned char *buf;
180 unsigned int pipe;
181 int err, size = 64;
182
183 BT_DBG("%s", hdev->name);
184
185 urb = usb_alloc_urb(0, GFP_KERNEL);
186 if (!urb)
187 return -ENOMEM;
188
189 buf = kmalloc(size, GFP_KERNEL);
190 if (!buf) {
191 usb_free_urb(urb);
192 return -ENOMEM;
193 }
194
195 pipe = usb_rcvbulkpipe(data->udev, 0x82);
196
197 usb_fill_bulk_urb(urb, data->udev, pipe,
198 buf, size, bpa10x_rx_complete, hdev);
199
200 urb->transfer_flags |= URB_FREE_BUFFER;
201
202 usb_anchor_urb(urb, &data->rx_anchor);
203
204 err = usb_submit_urb(urb, GFP_KERNEL);
205 if (err < 0) {
206 bt_dev_err(hdev, "urb %p submission failed (%d)", urb, -err);
207 usb_unanchor_urb(urb);
208 }
209
210 usb_free_urb(urb);
211
212 return err;
213}
214
215static int bpa10x_open(struct hci_dev *hdev)
216{
217 struct bpa10x_data *data = hci_get_drvdata(hdev);
218 int err;
219
220 BT_DBG("%s", hdev->name);
221
222 err = bpa10x_submit_intr_urb(hdev);
223 if (err < 0)
224 goto error;
225
226 err = bpa10x_submit_bulk_urb(hdev);
227 if (err < 0)
228 goto error;
229
230 return 0;
231
232error:
233 usb_kill_anchored_urbs(&data->rx_anchor);
234
235 return err;
236}
237
238static int bpa10x_close(struct hci_dev *hdev)
239{
240 struct bpa10x_data *data = hci_get_drvdata(hdev);
241
242 BT_DBG("%s", hdev->name);
243
244 usb_kill_anchored_urbs(&data->rx_anchor);
245
246 return 0;
247}
248
249static int bpa10x_flush(struct hci_dev *hdev)
250{
251 struct bpa10x_data *data = hci_get_drvdata(hdev);
252
253 BT_DBG("%s", hdev->name);
254
255 usb_kill_anchored_urbs(&data->tx_anchor);
256
257 return 0;
258}
259
260static int bpa10x_setup(struct hci_dev *hdev)
261{
262 static const u8 req[] = { 0x07 };
263 struct sk_buff *skb;
264
265 BT_DBG("%s", hdev->name);
266
267 /* Read revision string */
268 skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
269 if (IS_ERR(skb))
270 return PTR_ERR(skb);
271
272 bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
273
274 hci_set_fw_info(hdev, "%s", skb->data + 1);
275
276 kfree_skb(skb);
277 return 0;
278}
279
280static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
281{
282 struct bpa10x_data *data = hci_get_drvdata(hdev);
283 struct usb_ctrlrequest *dr;
284 struct urb *urb;
285 unsigned int pipe;
286 int err;
287
288 BT_DBG("%s", hdev->name);
289
290 skb->dev = (void *) hdev;
291
292 urb = usb_alloc_urb(0, GFP_KERNEL);
293 if (!urb)
294 return -ENOMEM;
295
296 /* Prepend skb with frame type */
297 *(u8 *)skb_push(skb, 1) = hci_skb_pkt_type(skb);
298
299 switch (hci_skb_pkt_type(skb)) {
300 case HCI_COMMAND_PKT:
301 dr = kmalloc(sizeof(*dr), GFP_KERNEL);
302 if (!dr) {
303 usb_free_urb(urb);
304 return -ENOMEM;
305 }
306
307 dr->bRequestType = USB_TYPE_VENDOR;
308 dr->bRequest = 0;
309 dr->wIndex = 0;
310 dr->wValue = 0;
311 dr->wLength = __cpu_to_le16(skb->len);
312
313 pipe = usb_sndctrlpipe(data->udev, 0x00);
314
315 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
316 skb->data, skb->len, bpa10x_tx_complete, skb);
317
318 hdev->stat.cmd_tx++;
319 break;
320
321 case HCI_ACLDATA_PKT:
322 pipe = usb_sndbulkpipe(data->udev, 0x02);
323
324 usb_fill_bulk_urb(urb, data->udev, pipe,
325 skb->data, skb->len, bpa10x_tx_complete, skb);
326
327 hdev->stat.acl_tx++;
328 break;
329
330 case HCI_SCODATA_PKT:
331 pipe = usb_sndbulkpipe(data->udev, 0x02);
332
333 usb_fill_bulk_urb(urb, data->udev, pipe,
334 skb->data, skb->len, bpa10x_tx_complete, skb);
335
336 hdev->stat.sco_tx++;
337 break;
338
339 default:
340 usb_free_urb(urb);
341 return -EILSEQ;
342 }
343
344 usb_anchor_urb(urb, &data->tx_anchor);
345
346 err = usb_submit_urb(urb, GFP_KERNEL);
347 if (err < 0) {
348 bt_dev_err(hdev, "urb %p submission failed", urb);
349 kfree(urb->setup_packet);
350 usb_unanchor_urb(urb);
351 }
352
353 usb_free_urb(urb);
354
355 return 0;
356}
357
358static int bpa10x_set_diag(struct hci_dev *hdev, bool enable)
359{
360 const u8 req[] = { 0x00, enable };
361 struct sk_buff *skb;
362
363 BT_DBG("%s", hdev->name);
364
365 if (!test_bit(HCI_RUNNING, &hdev->flags))
366 return -ENETDOWN;
367
368 /* Enable sniffer operation */
369 skb = __hci_cmd_sync(hdev, 0xfc0e, sizeof(req), req, HCI_INIT_TIMEOUT);
370 if (IS_ERR(skb))
371 return PTR_ERR(skb);
372
373 kfree_skb(skb);
374 return 0;
375}
376
377static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
378{
379 struct bpa10x_data *data;
380 struct hci_dev *hdev;
381 int err;
382
383 BT_DBG("intf %p id %p", intf, id);
384
385 if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
386 return -ENODEV;
387
388 data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
389 if (!data)
390 return -ENOMEM;
391
392 data->udev = interface_to_usbdev(intf);
393
394 init_usb_anchor(&data->tx_anchor);
395 init_usb_anchor(&data->rx_anchor);
396
397 hdev = hci_alloc_dev();
398 if (!hdev)
399 return -ENOMEM;
400
401 hdev->bus = HCI_USB;
402 hci_set_drvdata(hdev, data);
403
404 data->hdev = hdev;
405
406 SET_HCIDEV_DEV(hdev, &intf->dev);
407
408 hdev->open = bpa10x_open;
409 hdev->close = bpa10x_close;
410 hdev->flush = bpa10x_flush;
411 hdev->setup = bpa10x_setup;
412 hdev->send = bpa10x_send_frame;
413 hdev->set_diag = bpa10x_set_diag;
414
415 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
416
417 err = hci_register_dev(hdev);
418 if (err < 0) {
419 hci_free_dev(hdev);
420 return err;
421 }
422
423 usb_set_intfdata(intf, data);
424
425 return 0;
426}
427
428static void bpa10x_disconnect(struct usb_interface *intf)
429{
430 struct bpa10x_data *data = usb_get_intfdata(intf);
431
432 BT_DBG("intf %p", intf);
433
434 if (!data)
435 return;
436
437 usb_set_intfdata(intf, NULL);
438
439 hci_unregister_dev(data->hdev);
440
441 hci_free_dev(data->hdev);
442 kfree_skb(data->rx_skb[0]);
443 kfree_skb(data->rx_skb[1]);
444}
445
446static struct usb_driver bpa10x_driver = {
447 .name = "bpa10x",
448 .probe = bpa10x_probe,
449 .disconnect = bpa10x_disconnect,
450 .id_table = bpa10x_table,
451 .disable_hub_initiated_lpm = 1,
452};
453
454module_usb_driver(bpa10x_driver);
455
456MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
457MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
458MODULE_VERSION(VERSION);
459MODULE_LICENSE("GPL");
460