Commit | Line | Data |
---|---|---|
3fe70ba2 MFN |
1 | /* |
2 | * AIRcable USB Bluetooth Dongle Driver. | |
3 | * | |
4 | * Copyright (C) 2006 Manuel Francisco Naranjo (naranjo.manuel@gmail.com) | |
5 | * This program is free software; you can redistribute it and/or modify it under | |
6 | * the terms of the GNU General Public License version 2 as published by the | |
7 | * Free Software Foundation. | |
8 | * | |
9 | * The device works as an standard CDC device, it has 2 interfaces, the first | |
10 | * one is for firmware access and the second is the serial one. | |
11 | * The protocol is very simply, there are two posibilities reading or writing. | |
12 | * When writting the first urb must have a Header that starts with 0x20 0x29 the | |
13 | * next two bytes must say how much data will be sended. | |
14 | * When reading the process is almost equal except that the header starts with | |
15 | * 0x00 0x20. | |
16 | * | |
17 | * The device simply need some stuff to understand data comming from the usb | |
18 | * buffer: The First and Second byte is used for a Header, the Third and Fourth | |
19 | * tells the device the amount of information the package holds. | |
20 | * Packages are 60 bytes long Header Stuff. | |
21 | * When writting to the device the first two bytes of the header are 0x20 0x29 | |
22 | * When reading the bytes are 0x00 0x20, or 0x00 0x10, there is an strange | |
23 | * situation, when too much data arrives to the device because it sends the data | |
24 | * but with out the header. I will use a simply hack to override this situation, | |
25 | * if there is data coming that does not contain any header, then that is data | |
26 | * that must go directly to the tty, as there is no documentation about if there | |
27 | * is any other control code, I will simply check for the first | |
28 | * one. | |
29 | * | |
30 | * The driver registers himself with the USB-serial core and the USB Core. I had | |
31 | * to implement a probe function agains USB-serial, because other way, the | |
32 | * driver was attaching himself to both interfaces. I have tryed with different | |
33 | * configurations of usb_serial_driver with out exit, only the probe function | |
34 | * could handle this correctly. | |
35 | * | |
36 | * I have taken some info from a Greg Kroah-Hartman article: | |
37 | * http://www.linuxjournal.com/article/6573 | |
38 | * And from Linux Device Driver Kit CD, which is a great work, the authors taken | |
39 | * the work to recompile lots of information an knowladge in drivers development | |
40 | * and made it all avaible inside a cd. | |
41 | * URL: http://kernel.org/pub/linux/kernel/people/gregkh/ddk/ | |
42 | * | |
43 | */ | |
44 | ||
45 | #include <linux/tty.h> | |
46 | #include <linux/tty_flip.h> | |
47 | #include <linux/circ_buf.h> | |
48 | #include <linux/usb.h> | |
49 | #include <linux/usb/serial.h> | |
50 | ||
51 | static int debug; | |
52 | ||
53 | /* Vendor and Product ID */ | |
54 | #define AIRCABLE_VID 0x16CA | |
55 | #define AIRCABLE_USB_PID 0x1502 | |
56 | ||
57 | /* write buffer size defines */ | |
58 | #define AIRCABLE_BUF_SIZE 2048 | |
59 | ||
60 | /* Protocol Stuff */ | |
61 | #define HCI_HEADER_LENGTH 0x4 | |
62 | #define TX_HEADER_0 0x20 | |
63 | #define TX_HEADER_1 0x29 | |
64 | #define RX_HEADER_0 0x00 | |
65 | #define RX_HEADER_1 0x20 | |
66 | #define MAX_HCI_FRAMESIZE 60 | |
67 | #define HCI_COMPLETE_FRAME 64 | |
68 | ||
69 | /* rx_flags */ | |
70 | #define THROTTLED 0x01 | |
71 | #define ACTUALLY_THROTTLED 0x02 | |
72 | ||
73 | /* | |
74 | * Version Information | |
75 | */ | |
76 | #define DRIVER_VERSION "v1.0b2" | |
77 | #define DRIVER_AUTHOR "Naranjo, Manuel Francisco <naranjo.manuel@gmail.com>" | |
78 | #define DRIVER_DESC "AIRcable USB Driver" | |
79 | ||
80 | /* ID table that will be registered with USB core */ | |
81 | static struct usb_device_id id_table [] = { | |
82 | { USB_DEVICE(AIRCABLE_VID, AIRCABLE_USB_PID) }, | |
83 | { }, | |
84 | }; | |
85 | MODULE_DEVICE_TABLE(usb, id_table); | |
86 | ||
87 | ||
88 | /* Internal Structure */ | |
89 | struct aircable_private { | |
90 | spinlock_t rx_lock; /* spinlock for the receive lines */ | |
91 | struct circ_buf *tx_buf; /* write buffer */ | |
92 | struct circ_buf *rx_buf; /* read buffer */ | |
93 | int rx_flags; /* for throttilng */ | |
94 | struct work_struct rx_work; /* work cue for the receiving line */ | |
95 | }; | |
96 | ||
97 | /* Private methods */ | |
98 | ||
99 | /* Circular Buffer Methods, code from ti_usb_3410_5052 used */ | |
100 | /* | |
101 | * serial_buf_clear | |
102 | * | |
103 | * Clear out all data in the circular buffer. | |
104 | */ | |
105 | static void serial_buf_clear(struct circ_buf *cb) | |
106 | { | |
107 | cb->head = cb->tail = 0; | |
108 | } | |
109 | ||
110 | /* | |
111 | * serial_buf_alloc | |
112 | * | |
113 | * Allocate a circular buffer and all associated memory. | |
114 | */ | |
115 | static struct circ_buf *serial_buf_alloc(void) | |
116 | { | |
117 | struct circ_buf *cb; | |
118 | cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL); | |
119 | if (cb == NULL) | |
120 | return NULL; | |
121 | cb->buf = kmalloc(AIRCABLE_BUF_SIZE, GFP_KERNEL); | |
122 | if (cb->buf == NULL) { | |
123 | kfree(cb); | |
124 | return NULL; | |
125 | } | |
126 | serial_buf_clear(cb); | |
127 | return cb; | |
128 | } | |
129 | ||
130 | /* | |
131 | * serial_buf_free | |
132 | * | |
133 | * Free the buffer and all associated memory. | |
134 | */ | |
135 | static void serial_buf_free(struct circ_buf *cb) | |
136 | { | |
137 | kfree(cb->buf); | |
138 | kfree(cb); | |
139 | } | |
140 | ||
141 | /* | |
142 | * serial_buf_data_avail | |
143 | * | |
144 | * Return the number of bytes of data available in the circular | |
145 | * buffer. | |
146 | */ | |
147 | static int serial_buf_data_avail(struct circ_buf *cb) | |
148 | { | |
149 | return CIRC_CNT(cb->head,cb->tail,AIRCABLE_BUF_SIZE); | |
150 | } | |
151 | ||
152 | /* | |
153 | * serial_buf_put | |
154 | * | |
155 | * Copy data data from a user buffer and put it into the circular buffer. | |
156 | * Restrict to the amount of space available. | |
157 | * | |
158 | * Return the number of bytes copied. | |
159 | */ | |
160 | static int serial_buf_put(struct circ_buf *cb, const char *buf, int count) | |
161 | { | |
162 | int c, ret = 0; | |
163 | while (1) { | |
164 | c = CIRC_SPACE_TO_END(cb->head, cb->tail, AIRCABLE_BUF_SIZE); | |
165 | if (count < c) | |
166 | c = count; | |
167 | if (c <= 0) | |
168 | break; | |
169 | memcpy(cb->buf + cb->head, buf, c); | |
170 | cb->head = (cb->head + c) & (AIRCABLE_BUF_SIZE-1); | |
171 | buf += c; | |
172 | count -= c; | |
173 | ret= c; | |
174 | } | |
175 | return ret; | |
176 | } | |
177 | ||
178 | /* | |
179 | * serial_buf_get | |
180 | * | |
181 | * Get data from the circular buffer and copy to the given buffer. | |
182 | * Restrict to the amount of data available. | |
183 | * | |
184 | * Return the number of bytes copied. | |
185 | */ | |
186 | static int serial_buf_get(struct circ_buf *cb, char *buf, int count) | |
187 | { | |
188 | int c, ret = 0; | |
189 | while (1) { | |
190 | c = CIRC_CNT_TO_END(cb->head, cb->tail, AIRCABLE_BUF_SIZE); | |
191 | if (count < c) | |
192 | c = count; | |
193 | if (c <= 0) | |
194 | break; | |
195 | memcpy(buf, cb->buf + cb->tail, c); | |
196 | cb->tail = (cb->tail + c) & (AIRCABLE_BUF_SIZE-1); | |
197 | buf += c; | |
198 | count -= c; | |
199 | ret= c; | |
200 | } | |
201 | return ret; | |
202 | } | |
203 | ||
204 | /* End of circula buffer methods */ | |
205 | ||
206 | static void aircable_send(struct usb_serial_port *port) | |
207 | { | |
208 | int count, result; | |
209 | struct aircable_private *priv = usb_get_serial_port_data(port); | |
210 | unsigned char* buf; | |
211 | dbg("%s - port %d", __FUNCTION__, port->number); | |
212 | if (port->write_urb_busy) | |
213 | return; | |
214 | ||
215 | count = min(serial_buf_data_avail(priv->tx_buf), MAX_HCI_FRAMESIZE); | |
216 | if (count == 0) | |
217 | return; | |
218 | ||
219 | buf = kzalloc(count + HCI_HEADER_LENGTH, GFP_ATOMIC); | |
220 | if (!buf) { | |
8ac283ad | 221 | err("%s- kzalloc(%d) failed.", __FUNCTION__, |
3fe70ba2 MFN |
222 | count + HCI_HEADER_LENGTH); |
223 | return; | |
224 | } | |
225 | ||
226 | buf[0] = TX_HEADER_0; | |
227 | buf[1] = TX_HEADER_1; | |
228 | buf[2] = (unsigned char)count; | |
229 | buf[3] = (unsigned char)(count >> 8); | |
230 | serial_buf_get(priv->tx_buf,buf + HCI_HEADER_LENGTH, MAX_HCI_FRAMESIZE); | |
231 | ||
232 | memcpy(port->write_urb->transfer_buffer, buf, | |
233 | count + HCI_HEADER_LENGTH); | |
234 | ||
235 | kfree(buf); | |
236 | port->write_urb_busy = 1; | |
237 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, | |
238 | count + HCI_HEADER_LENGTH, | |
239 | port->write_urb->transfer_buffer); | |
240 | port->write_urb->transfer_buffer_length = count + HCI_HEADER_LENGTH; | |
241 | port->write_urb->dev = port->serial->dev; | |
242 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); | |
243 | ||
244 | if (result) { | |
245 | dev_err(&port->dev, | |
246 | "%s - failed submitting write urb, error %d\n", | |
247 | __FUNCTION__, result); | |
248 | port->write_urb_busy = 0; | |
249 | } | |
250 | ||
251 | schedule_work(&port->work); | |
252 | } | |
253 | ||
254 | static void aircable_read(void *params) | |
255 | { | |
256 | struct usb_serial_port *port = params; | |
257 | struct aircable_private *priv = usb_get_serial_port_data(port); | |
258 | struct tty_struct *tty; | |
259 | unsigned char *data; | |
260 | int count; | |
261 | if (priv->rx_flags & THROTTLED){ | |
262 | if (priv->rx_flags & ACTUALLY_THROTTLED) | |
263 | schedule_work(&priv->rx_work); | |
264 | return; | |
265 | } | |
266 | ||
267 | /* By now I will flush data to the tty in packages of no more than | |
268 | * 64 bytes, to ensure I do not get throttled. | |
269 | * Ask USB mailing list for better aproach. | |
270 | */ | |
271 | tty = port->tty; | |
272 | ||
273 | if (!tty) | |
274 | schedule_work(&priv->rx_work); | |
275 | ||
276 | count = min(64, serial_buf_data_avail(priv->rx_buf)); | |
277 | ||
278 | if (count <= 0) | |
279 | return; //We have finished sending everything. | |
280 | ||
281 | tty_prepare_flip_string(tty, &data, count); | |
282 | if (!data){ | |
8ac283ad | 283 | err("%s- kzalloc(%d) failed.", __FUNCTION__, count); |
3fe70ba2 MFN |
284 | return; |
285 | } | |
286 | ||
287 | serial_buf_get(priv->rx_buf, data, count); | |
288 | ||
289 | tty_flip_buffer_push(tty); | |
290 | ||
291 | if (serial_buf_data_avail(priv->rx_buf)) | |
292 | schedule_work(&priv->rx_work); | |
293 | ||
294 | return; | |
295 | } | |
296 | /* End of private methods */ | |
297 | ||
298 | static int aircable_probe(struct usb_serial *serial, | |
299 | const struct usb_device_id *id) | |
300 | { | |
301 | struct usb_host_interface *iface_desc = serial->interface->cur_altsetting; | |
302 | struct usb_endpoint_descriptor *endpoint; | |
303 | int num_bulk_out=0; | |
304 | int i; | |
305 | ||
306 | for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) { | |
307 | endpoint = &iface_desc->endpoint[i].desc; | |
308 | if (((endpoint->bEndpointAddress & 0x80) == 0x00) && | |
309 | ((endpoint->bmAttributes & 3) == 0x02)) { | |
310 | /* we found our bulk out endpoint */ | |
311 | dbg("found bulk out on endpoint %d", i); | |
312 | ++num_bulk_out; | |
313 | } | |
314 | } | |
315 | ||
316 | if (num_bulk_out == 0) { | |
317 | dbg("Invalid interface, discarding"); | |
318 | return -ENODEV; | |
319 | } | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static int aircable_attach (struct usb_serial *serial) | |
325 | { | |
326 | struct usb_serial_port *port = serial->port[0]; | |
327 | struct aircable_private *priv; | |
328 | ||
329 | priv = kzalloc(sizeof(struct aircable_private), GFP_KERNEL); | |
330 | if (!priv){ | |
331 | err("%s- kmalloc(%Zd) failed.", __FUNCTION__, | |
332 | sizeof(struct aircable_private)); | |
333 | return -ENOMEM; | |
334 | } | |
335 | ||
336 | /* Allocation of Circular Buffers */ | |
337 | priv->tx_buf = serial_buf_alloc(); | |
338 | if (priv->tx_buf == NULL) { | |
339 | kfree(priv); | |
340 | return -ENOMEM; | |
341 | } | |
342 | ||
343 | priv->rx_buf = serial_buf_alloc(); | |
344 | if (priv->rx_buf == NULL) { | |
345 | kfree(priv->tx_buf); | |
346 | kfree(priv); | |
347 | return -ENOMEM; | |
348 | } | |
349 | ||
350 | priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); | |
351 | INIT_WORK(&priv->rx_work, aircable_read, port); | |
352 | ||
353 | usb_set_serial_port_data(serial->port[0], priv); | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | static void aircable_shutdown(struct usb_serial *serial) | |
359 | { | |
360 | ||
361 | struct usb_serial_port *port = serial->port[0]; | |
362 | struct aircable_private *priv = usb_get_serial_port_data(port); | |
363 | ||
364 | dbg("%s", __FUNCTION__); | |
365 | ||
366 | if (priv) { | |
367 | serial_buf_free(priv->tx_buf); | |
368 | serial_buf_free(priv->rx_buf); | |
369 | usb_set_serial_port_data(port, NULL); | |
370 | kfree(priv); | |
371 | } | |
372 | } | |
373 | ||
374 | static int aircable_write_room(struct usb_serial_port *port) | |
375 | { | |
376 | struct aircable_private *priv = usb_get_serial_port_data(port); | |
377 | return serial_buf_data_avail(priv->tx_buf); | |
378 | } | |
379 | ||
380 | static int aircable_write(struct usb_serial_port *port, | |
381 | const unsigned char *source, int count) | |
382 | { | |
383 | struct aircable_private *priv = usb_get_serial_port_data(port); | |
384 | int temp; | |
385 | ||
386 | dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); | |
387 | ||
388 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, source); | |
389 | ||
390 | if (!count){ | |
391 | dbg("%s - write request of 0 bytes", __FUNCTION__); | |
392 | return count; | |
393 | } | |
394 | ||
395 | temp = serial_buf_put(priv->tx_buf, source, count); | |
396 | ||
397 | aircable_send(port); | |
398 | ||
399 | if (count > AIRCABLE_BUF_SIZE) | |
400 | count = AIRCABLE_BUF_SIZE; | |
401 | ||
402 | return count; | |
403 | ||
404 | } | |
405 | ||
7d12e780 | 406 | static void aircable_write_bulk_callback(struct urb *urb) |
3fe70ba2 MFN |
407 | { |
408 | struct usb_serial_port *port = urb->context; | |
409 | int result; | |
410 | ||
411 | dbg("%s - urb->status: %d", __FUNCTION__ , urb->status); | |
412 | ||
413 | /* This has been taken from cypress_m8.c cypress_write_int_callback */ | |
414 | switch (urb->status) { | |
415 | case 0: | |
416 | /* success */ | |
417 | break; | |
418 | case -ECONNRESET: | |
419 | case -ENOENT: | |
420 | case -ESHUTDOWN: | |
421 | /* this urb is terminated, clean up */ | |
422 | dbg("%s - urb shutting down with status: %d", | |
423 | __FUNCTION__, urb->status); | |
424 | port->write_urb_busy = 0; | |
425 | return; | |
426 | default: | |
427 | /* error in the urb, so we have to resubmit it */ | |
428 | dbg("%s - Overflow in write", __FUNCTION__); | |
429 | dbg("%s - nonzero write bulk status received: %d", | |
430 | __FUNCTION__, urb->status); | |
431 | port->write_urb->transfer_buffer_length = 1; | |
432 | port->write_urb->dev = port->serial->dev; | |
433 | result = usb_submit_urb(port->write_urb, GFP_KERNEL); | |
434 | if (result) | |
435 | dev_err(&urb->dev->dev, | |
436 | "%s - failed resubmitting write urb, error %d\n", | |
437 | __FUNCTION__, result); | |
438 | else | |
439 | return; | |
440 | } | |
441 | ||
442 | port->write_urb_busy = 0; | |
443 | ||
444 | aircable_send(port); | |
445 | } | |
446 | ||
7d12e780 | 447 | static void aircable_read_bulk_callback(struct urb *urb) |
3fe70ba2 MFN |
448 | { |
449 | struct usb_serial_port *port = urb->context; | |
450 | struct aircable_private *priv = usb_get_serial_port_data(port); | |
451 | struct tty_struct *tty; | |
452 | unsigned long no_packages, remaining, package_length, i; | |
453 | int result, shift = 0; | |
454 | unsigned char *temp; | |
455 | ||
456 | dbg("%s - port %d", __FUNCTION__, port->number); | |
457 | ||
458 | if (urb->status) { | |
459 | dbg("%s - urb->status = %d", __FUNCTION__, urb->status); | |
460 | if (!port->open_count) { | |
461 | dbg("%s - port is closed, exiting.", __FUNCTION__); | |
462 | return; | |
463 | } | |
464 | if (urb->status == -EPROTO) { | |
465 | dbg("%s - caught -EPROTO, resubmitting the urb", | |
466 | __FUNCTION__); | |
467 | usb_fill_bulk_urb(port->read_urb, port->serial->dev, | |
468 | usb_rcvbulkpipe(port->serial->dev, | |
469 | port->bulk_in_endpointAddress), | |
470 | port->read_urb->transfer_buffer, | |
471 | port->read_urb->transfer_buffer_length, | |
472 | aircable_read_bulk_callback, port); | |
473 | ||
474 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
475 | if (result) | |
476 | dev_err(&urb->dev->dev, | |
477 | "%s - failed resubmitting read urb, error %d\n", | |
478 | __FUNCTION__, result); | |
479 | return; | |
480 | } | |
481 | dbg("%s - unable to handle the error, exiting.", __FUNCTION__); | |
482 | return; | |
483 | } | |
484 | ||
485 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, | |
486 | urb->actual_length,urb->transfer_buffer); | |
487 | ||
488 | tty = port->tty; | |
489 | if (tty && urb->actual_length) { | |
490 | if (urb->actual_length <= 2) { | |
491 | /* This is an incomplete package */ | |
492 | serial_buf_put(priv->rx_buf, urb->transfer_buffer, | |
493 | urb->actual_length); | |
494 | } else { | |
495 | temp = urb->transfer_buffer; | |
496 | if (temp[0] == RX_HEADER_0) | |
497 | shift = HCI_HEADER_LENGTH; | |
498 | ||
499 | remaining = urb->actual_length; | |
500 | no_packages = urb->actual_length / (HCI_COMPLETE_FRAME); | |
501 | ||
502 | if (urb->actual_length % HCI_COMPLETE_FRAME != 0) | |
503 | no_packages+=1; | |
504 | ||
505 | for (i = 0; i < no_packages ;i++) { | |
506 | if (remaining > (HCI_COMPLETE_FRAME)) | |
507 | package_length = HCI_COMPLETE_FRAME; | |
508 | else | |
509 | package_length = remaining; | |
510 | remaining -= package_length; | |
511 | ||
512 | serial_buf_put(priv->rx_buf, | |
513 | urb->transfer_buffer + shift + | |
514 | (HCI_COMPLETE_FRAME) * (i), | |
515 | package_length - shift); | |
516 | } | |
517 | } | |
518 | aircable_read(port); | |
519 | } | |
520 | ||
521 | /* Schedule the next read _if_ we are still open */ | |
522 | if (port->open_count) { | |
523 | usb_fill_bulk_urb(port->read_urb, port->serial->dev, | |
524 | usb_rcvbulkpipe(port->serial->dev, | |
525 | port->bulk_in_endpointAddress), | |
526 | port->read_urb->transfer_buffer, | |
527 | port->read_urb->transfer_buffer_length, | |
528 | aircable_read_bulk_callback, port); | |
529 | ||
530 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
531 | if (result) | |
532 | dev_err(&urb->dev->dev, | |
533 | "%s - failed resubmitting read urb, error %d\n", | |
534 | __FUNCTION__, result); | |
535 | } | |
536 | ||
537 | return; | |
538 | } | |
539 | ||
540 | /* Based on ftdi_sio.c throttle */ | |
541 | static void aircable_throttle(struct usb_serial_port *port) | |
542 | { | |
543 | struct aircable_private *priv = usb_get_serial_port_data(port); | |
544 | unsigned long flags; | |
545 | ||
546 | dbg("%s - port %d", __FUNCTION__, port->number); | |
547 | ||
548 | spin_lock_irqsave(&priv->rx_lock, flags); | |
549 | priv->rx_flags |= THROTTLED; | |
550 | spin_unlock_irqrestore(&priv->rx_lock, flags); | |
551 | } | |
552 | ||
553 | /* Based on ftdi_sio.c unthrottle */ | |
554 | static void aircable_unthrottle(struct usb_serial_port *port) | |
555 | { | |
556 | struct aircable_private *priv = usb_get_serial_port_data(port); | |
557 | int actually_throttled; | |
558 | unsigned long flags; | |
559 | ||
560 | dbg("%s - port %d", __FUNCTION__, port->number); | |
561 | ||
562 | spin_lock_irqsave(&priv->rx_lock, flags); | |
563 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; | |
564 | priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); | |
565 | spin_unlock_irqrestore(&priv->rx_lock, flags); | |
566 | ||
567 | if (actually_throttled) | |
568 | schedule_work(&priv->rx_work); | |
569 | } | |
570 | ||
571 | static struct usb_serial_driver aircable_device = { | |
572 | .description = "aircable", | |
573 | .id_table = id_table, | |
574 | .num_ports = 1, | |
575 | .attach = aircable_attach, | |
576 | .probe = aircable_probe, | |
577 | .shutdown = aircable_shutdown, | |
578 | .write = aircable_write, | |
579 | .write_room = aircable_write_room, | |
580 | .write_bulk_callback = aircable_write_bulk_callback, | |
581 | .read_bulk_callback = aircable_read_bulk_callback, | |
582 | .throttle = aircable_throttle, | |
583 | .unthrottle = aircable_unthrottle, | |
584 | }; | |
585 | ||
586 | static struct usb_driver aircable_driver = { | |
587 | .name = "aircable", | |
588 | .probe = usb_serial_probe, | |
589 | .disconnect = usb_serial_disconnect, | |
590 | .id_table = id_table, | |
591 | }; | |
592 | ||
593 | static int __init aircable_init (void) | |
594 | { | |
595 | int retval; | |
596 | retval = usb_serial_register(&aircable_device); | |
597 | if (retval) | |
598 | goto failed_serial_register; | |
599 | retval = usb_register(&aircable_driver); | |
600 | if (retval) | |
601 | goto failed_usb_register; | |
602 | return 0; | |
603 | ||
604 | failed_serial_register: | |
605 | usb_serial_deregister(&aircable_device); | |
606 | failed_usb_register: | |
607 | return retval; | |
608 | } | |
609 | ||
610 | static void __exit aircable_exit (void) | |
611 | { | |
612 | usb_deregister(&aircable_driver); | |
613 | usb_serial_deregister(&aircable_device); | |
614 | } | |
615 | ||
616 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
617 | MODULE_DESCRIPTION(DRIVER_DESC); | |
618 | MODULE_VERSION(DRIVER_VERSION); | |
619 | MODULE_LICENSE("GPL"); | |
620 | ||
621 | module_init(aircable_init); | |
622 | module_exit(aircable_exit); | |
623 | ||
624 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
625 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |