blob: 49c397e21b39886ed409461a30479cfcc427772c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 *
3 * Digianswer Bluetooth USB driver
4 *
Marcel Holtmanne24b21e2007-10-20 13:41:33 +02005 * Copyright (C) 2004-2007 Marcel Holtmann <marcel@holtmann.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/kernel.h>
Marcel Holtmanne24b21e2007-10-20 13:41:33 +020025#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/init.h>
27#include <linux/slab.h>
28#include <linux/types.h>
Marcel Holtmanne24b21e2007-10-20 13:41:33 +020029#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/errno.h>
Marcel Holtmanne24b21e2007-10-20 13:41:33 +020031#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33#include <linux/usb.h>
34
35#include <net/bluetooth/bluetooth.h>
36#include <net/bluetooth/hci_core.h>
37
Marcel Holtmann943cc592015-10-08 03:06:53 +020038#include "hci_uart.h"
39
40#define VERSION "0.11"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Marcel Holtmanne8549382013-10-11 07:46:20 -070042static const struct usb_device_id bpa10x_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 /* Tektronix BPA 100/105 (Digianswer) */
44 { USB_DEVICE(0x08fd, 0x0002) },
45
46 { } /* Terminating entry */
47};
48
49MODULE_DEVICE_TABLE(usb, bpa10x_table);
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051struct bpa10x_data {
Marcel Holtmanne24b21e2007-10-20 13:41:33 +020052 struct hci_dev *hdev;
53 struct usb_device *udev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Marcel Holtmanne24b21e2007-10-20 13:41:33 +020055 struct usb_anchor tx_anchor;
56 struct usb_anchor rx_anchor;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Marcel Holtmanne24b21e2007-10-20 13:41:33 +020058 struct sk_buff *rx_skb[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -070059};
60
Marcel Holtmanne24b21e2007-10-20 13:41:33 +020061static void bpa10x_tx_complete(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062{
Marcel Holtmanne24b21e2007-10-20 13:41:33 +020063 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
Marcel Holtmann943cc592015-10-08 03:06:53 +020083#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
Marcel Holtmanne24b21e2007-10-20 13:41:33 +020099static void bpa10x_rx_complete(struct urb *urb)
100{
101 struct hci_dev *hdev = urb->context;
David Herrmann155961e2012-02-09 21:58:32 +0100102 struct bpa10x_data *data = hci_get_drvdata(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 int err;
104
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200105 BT_DBG("%s urb %p status %d count %d", hdev->name,
106 urb, urb->status, urb->actual_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200108 if (!test_bit(HCI_RUNNING, &hdev->flags))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 return;
110
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200111 if (urb->status == 0) {
Marcel Holtmann943cc592015-10-08 03:06:53 +0200112 bool idx = usb_pipebulk(urb->pipe);
113
114 data->rx_skb[idx] = h4_recv_buf(hdev, data->rx_skb[idx],
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200115 urb->transfer_buffer,
Marcel Holtmann943cc592015-10-08 03:06:53 +0200116 urb->actual_length,
117 bpa10x_recv_pkts,
118 ARRAY_SIZE(bpa10x_recv_pkts));
119 if (IS_ERR(data->rx_skb[idx])) {
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200120 BT_ERR("%s corrupted event packet", hdev->name);
121 hdev->stat.err_rx++;
Marcel Holtmann943cc592015-10-08 03:06:53 +0200122 data->rx_skb[idx] = NULL;
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200123 }
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
136static inline int bpa10x_submit_intr_urb(struct hci_dev *hdev)
137{
David Herrmann155961e2012-02-09 21:58:32 +0100138 struct bpa10x_data *data = hci_get_drvdata(hdev);
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200139 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);
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200170 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
172 usb_free_urb(urb);
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200173
174 return err;
175}
176
177static inline int bpa10x_submit_bulk_urb(struct hci_dev *hdev)
178{
David Herrmann155961e2012-02-09 21:58:32 +0100179 struct bpa10x_data *data = hci_get_drvdata(hdev);
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200180 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);
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200211 }
212
213 usb_free_urb(urb);
214
215 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
218static int bpa10x_open(struct hci_dev *hdev)
219{
David Herrmann155961e2012-02-09 21:58:32 +0100220 struct bpa10x_data *data = hci_get_drvdata(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 int err;
222
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200223 BT_DBG("%s", hdev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200225 err = bpa10x_submit_intr_urb(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 if (err < 0)
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200227 goto error;
228
229 err = bpa10x_submit_bulk_urb(hdev);
230 if (err < 0)
231 goto error;
232
233 return 0;
234
235error:
236 usb_kill_anchored_urbs(&data->rx_anchor);
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 return err;
239}
240
241static int bpa10x_close(struct hci_dev *hdev)
242{
David Herrmann155961e2012-02-09 21:58:32 +0100243 struct bpa10x_data *data = hci_get_drvdata(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200245 BT_DBG("%s", hdev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200247 usb_kill_anchored_urbs(&data->rx_anchor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
249 return 0;
250}
251
252static int bpa10x_flush(struct hci_dev *hdev)
253{
David Herrmann155961e2012-02-09 21:58:32 +0100254 struct bpa10x_data *data = hci_get_drvdata(hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200256 BT_DBG("%s", hdev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200258 usb_kill_anchored_urbs(&data->tx_anchor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 return 0;
261}
262
Marcel Holtmannddd68ec2015-10-08 02:24:06 +0200263static 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
Marcel Holtmann7bd8f092013-10-11 06:19:18 -0700281static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
David Herrmann155961e2012-02-09 21:58:32 +0100283 struct bpa10x_data *data = hci_get_drvdata(hdev);
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200284 struct usb_ctrlrequest *dr;
285 struct urb *urb;
286 unsigned int pipe;
287 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200289 BT_DBG("%s", hdev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
Marcel Holtmann7bd8f092013-10-11 06:19:18 -0700291 skb->dev = (void *) hdev;
292
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200293 urb = usb_alloc_urb(0, GFP_ATOMIC);
294 if (!urb)
295 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297 /* Prepend skb with frame type */
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200298 *skb_push(skb, 1) = bt_cb(skb)->pkt_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
Marcel Holtmann0d48d932005-08-09 20:30:28 -0700300 switch (bt_cb(skb)->pkt_type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 case HCI_COMMAND_PKT:
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200302 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 hdev->stat.cmd_tx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 break;
321
322 case HCI_ACLDATA_PKT:
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200323 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 hdev->stat.acl_tx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 break;
330
331 case HCI_SCODATA_PKT:
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200332 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 hdev->stat.sco_tx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200340 default:
Adrian Bunkcb7cd422008-02-05 03:08:45 -0800341 usb_free_urb(urb);
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200342 return -EILSEQ;
343 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200345 usb_anchor_urb(urb, &data->tx_anchor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200347 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
356 return 0;
357}
358
Marcel Holtmann881f7e82015-10-08 03:01:44 +0200359static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
379{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 struct bpa10x_data *data;
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200381 struct hci_dev *hdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 int err;
383
384 BT_DBG("intf %p id %p", intf, id);
385
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200386 if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
Marcel Holtmann245dc3d2005-10-28 19:20:57 +0200387 return -ENODEV;
388
Sachin Kamat704687c2012-07-27 12:38:34 +0530389 data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200390 if (!data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200393 data->udev = interface_to_usbdev(intf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200395 init_usb_anchor(&data->tx_anchor);
396 init_usb_anchor(&data->rx_anchor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
398 hdev = hci_alloc_dev();
Sachin Kamat704687c2012-07-27 12:38:34 +0530399 if (!hdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
Marcel Holtmannc13854c2010-02-08 15:27:07 +0100402 hdev->bus = HCI_USB;
David Herrmann155961e2012-02-09 21:58:32 +0100403 hci_set_drvdata(hdev, data);
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200404
405 data->hdev = hdev;
406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 SET_HCIDEV_DEV(hdev, &intf->dev);
408
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200409 hdev->open = bpa10x_open;
410 hdev->close = bpa10x_close;
411 hdev->flush = bpa10x_flush;
Marcel Holtmannddd68ec2015-10-08 02:24:06 +0200412 hdev->setup = bpa10x_setup;
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200413 hdev->send = bpa10x_send_frame;
Marcel Holtmann881f7e82015-10-08 03:01:44 +0200414 hdev->set_diag = bpa10x_set_diag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
Szymon Janca6c511c2012-05-23 12:35:46 +0200416 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
Marcel Holtmann7a9d4022008-11-30 12:17:26 +0100417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 err = hci_register_dev(hdev);
419 if (err < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 hci_free_dev(hdev);
421 return err;
422 }
423
424 usb_set_intfdata(intf, data);
425
426 return 0;
427}
428
429static void bpa10x_disconnect(struct usb_interface *intf)
430{
431 struct bpa10x_data *data = usb_get_intfdata(intf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
433 BT_DBG("intf %p", intf);
434
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200435 if (!data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 return;
437
438 usb_set_intfdata(intf, NULL);
439
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200440 hci_unregister_dev(data->hdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
Marcel Holtmanne24b21e2007-10-20 13:41:33 +0200442 hci_free_dev(data->hdev);
David Herrmannd25442b2012-01-07 15:47:17 +0100443 kfree_skb(data->rx_skb[0]);
444 kfree_skb(data->rx_skb[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445}
446
447static struct usb_driver bpa10x_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 .name = "bpa10x",
449 .probe = bpa10x_probe,
450 .disconnect = bpa10x_disconnect,
451 .id_table = bpa10x_table,
Sarah Sharpe1f12eb2012-04-23 10:08:51 -0700452 .disable_hub_initiated_lpm = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453};
454
Greg Kroah-Hartman93f15082011-11-18 09:47:34 -0800455module_usb_driver(bpa10x_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
458MODULE_DESCRIPTION("Digianswer Bluetooth USB driver ver " VERSION);
459MODULE_VERSION(VERSION);
460MODULE_LICENSE("GPL");