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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * USB Serial Converter driver | |
3 | * | |
502b95c1 | 4 | * Copyright (C) 1999 - 2005 Greg Kroah-Hartman (greg@kroah.com) |
1da177e4 LT |
5 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
6 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
502b95c1 | 12 | * This driver was originally based on the ACM driver by Armin Fuerst (which was |
1da177e4 LT |
13 | * based on a driver by Brad Keryan) |
14 | * | |
15 | * See Documentation/usb/usb-serial.txt for more information on using this driver | |
16 | * | |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/errno.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/tty.h> | |
24 | #include <linux/tty_driver.h> | |
25 | #include <linux/tty_flip.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <linux/spinlock.h> | |
1ce7dd26 | 29 | #include <linux/mutex.h> |
1da177e4 LT |
30 | #include <linux/list.h> |
31 | #include <linux/smp_lock.h> | |
32 | #include <asm/uaccess.h> | |
33 | #include <linux/usb.h> | |
34 | #include "usb-serial.h" | |
35 | #include "pl2303.h" | |
36 | ||
37 | /* | |
38 | * Version Information | |
39 | */ | |
1da177e4 LT |
40 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
41 | #define DRIVER_DESC "USB Serial Driver core" | |
42 | ||
43 | /* Driver structure we register with the USB core */ | |
44 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
45 | .name = "usbserial", |
46 | .probe = usb_serial_probe, | |
47 | .disconnect = usb_serial_disconnect, | |
ba9dc657 | 48 | .no_dynamic_id = 1, |
1da177e4 LT |
49 | }; |
50 | ||
51 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
52 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
53 | cause the "hotplug" program to pull in whatever module is necessary | |
54 | via modprobe, and modprobe will load usbserial because the serial | |
55 | drivers depend on it. | |
56 | */ | |
57 | ||
58 | static int debug; | |
59 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; /* initially all NULL */ | |
60 | static LIST_HEAD(usb_serial_driver_list); | |
61 | ||
62 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
63 | { | |
64 | struct usb_serial *serial = serial_table[index]; | |
65 | ||
66 | if (serial) | |
67 | kref_get(&serial->kref); | |
68 | return serial; | |
69 | } | |
70 | ||
71 | static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor) | |
72 | { | |
73 | unsigned int i, j; | |
74 | int good_spot; | |
75 | ||
76 | dbg("%s %d", __FUNCTION__, num_ports); | |
77 | ||
78 | *minor = 0; | |
79 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
80 | if (serial_table[i]) | |
81 | continue; | |
82 | ||
83 | good_spot = 1; | |
84 | for (j = 1; j <= num_ports-1; ++j) | |
85 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
86 | good_spot = 0; | |
87 | i += j; | |
88 | break; | |
89 | } | |
90 | if (good_spot == 0) | |
91 | continue; | |
92 | ||
93 | *minor = i; | |
94 | dbg("%s - minor base = %d", __FUNCTION__, *minor); | |
95 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) | |
96 | serial_table[i] = serial; | |
97 | return serial; | |
98 | } | |
99 | return NULL; | |
100 | } | |
101 | ||
102 | static void return_serial(struct usb_serial *serial) | |
103 | { | |
104 | int i; | |
105 | ||
106 | dbg("%s", __FUNCTION__); | |
107 | ||
108 | if (serial == NULL) | |
109 | return; | |
110 | ||
111 | for (i = 0; i < serial->num_ports; ++i) { | |
112 | serial_table[serial->minor + i] = NULL; | |
113 | } | |
114 | } | |
115 | ||
116 | static void destroy_serial(struct kref *kref) | |
117 | { | |
118 | struct usb_serial *serial; | |
119 | struct usb_serial_port *port; | |
120 | int i; | |
121 | ||
122 | serial = to_usb_serial(kref); | |
123 | ||
269bda1c | 124 | dbg("%s - %s", __FUNCTION__, serial->type->description); |
1da177e4 LT |
125 | |
126 | serial->type->shutdown(serial); | |
127 | ||
128 | /* return the minor range that this device had */ | |
129 | return_serial(serial); | |
130 | ||
131 | for (i = 0; i < serial->num_ports; ++i) | |
132 | serial->port[i]->open_count = 0; | |
133 | ||
134 | /* the ports are cleaned up and released in port_release() */ | |
135 | for (i = 0; i < serial->num_ports; ++i) | |
136 | if (serial->port[i]->dev.parent != NULL) { | |
137 | device_unregister(&serial->port[i]->dev); | |
138 | serial->port[i] = NULL; | |
139 | } | |
140 | ||
141 | /* If this is a "fake" port, we have to clean it up here, as it will | |
142 | * not get cleaned up in port_release() as it was never registered with | |
143 | * the driver core */ | |
144 | if (serial->num_ports < serial->num_port_pointers) { | |
145 | for (i = serial->num_ports; i < serial->num_port_pointers; ++i) { | |
146 | port = serial->port[i]; | |
147 | if (!port) | |
148 | continue; | |
149 | usb_kill_urb(port->read_urb); | |
150 | usb_free_urb(port->read_urb); | |
151 | usb_kill_urb(port->write_urb); | |
152 | usb_free_urb(port->write_urb); | |
153 | usb_kill_urb(port->interrupt_in_urb); | |
154 | usb_free_urb(port->interrupt_in_urb); | |
155 | usb_kill_urb(port->interrupt_out_urb); | |
156 | usb_free_urb(port->interrupt_out_urb); | |
157 | kfree(port->bulk_in_buffer); | |
158 | kfree(port->bulk_out_buffer); | |
159 | kfree(port->interrupt_in_buffer); | |
160 | kfree(port->interrupt_out_buffer); | |
161 | } | |
162 | } | |
163 | ||
2f8ad9a1 PZ |
164 | flush_scheduled_work(); /* port->work */ |
165 | ||
1da177e4 LT |
166 | usb_put_dev(serial->dev); |
167 | ||
168 | /* free up any memory that we allocated */ | |
169 | kfree (serial); | |
170 | } | |
171 | ||
73e487fd GL |
172 | void usb_serial_put(struct usb_serial *serial) |
173 | { | |
174 | kref_put(&serial->kref, destroy_serial); | |
175 | } | |
176 | ||
1da177e4 LT |
177 | /***************************************************************************** |
178 | * Driver tty interface functions | |
179 | *****************************************************************************/ | |
180 | static int serial_open (struct tty_struct *tty, struct file * filp) | |
181 | { | |
182 | struct usb_serial *serial; | |
183 | struct usb_serial_port *port; | |
184 | unsigned int portNumber; | |
185 | int retval; | |
186 | ||
187 | dbg("%s", __FUNCTION__); | |
188 | ||
189 | /* get the serial object associated with this tty pointer */ | |
190 | serial = usb_serial_get_by_index(tty->index); | |
191 | if (!serial) { | |
192 | tty->driver_data = NULL; | |
193 | return -ENODEV; | |
194 | } | |
195 | ||
196 | portNumber = tty->index - serial->minor; | |
197 | port = serial->port[portNumber]; | |
71a84163 LFC |
198 | if (!port) { |
199 | retval = -ENODEV; | |
200 | goto bailout_kref_put; | |
201 | } | |
8a4613f0 | 202 | |
71a84163 LFC |
203 | if (mutex_lock_interruptible(&port->mutex)) { |
204 | retval = -ERESTARTSYS; | |
205 | goto bailout_kref_put; | |
206 | } | |
1da177e4 LT |
207 | |
208 | ++port->open_count; | |
209 | ||
ca85485c PF |
210 | /* set up our port structure making the tty driver |
211 | * remember our port object, and us it */ | |
212 | tty->driver_data = port; | |
213 | port->tty = tty; | |
1da177e4 | 214 | |
ca85485c | 215 | if (port->open_count == 1) { |
1da177e4 LT |
216 | |
217 | /* lock this module before we call it | |
218 | * this may fail, which means we must bail out, | |
219 | * safe because we are called with BKL held */ | |
18fcac35 | 220 | if (!try_module_get(serial->type->driver.owner)) { |
1da177e4 | 221 | retval = -ENODEV; |
71a84163 | 222 | goto bailout_mutex_unlock; |
1da177e4 LT |
223 | } |
224 | ||
225 | /* only call the device specific open if this | |
226 | * is the first time the port is opened */ | |
227 | retval = serial->type->open(port, filp); | |
228 | if (retval) | |
229 | goto bailout_module_put; | |
230 | } | |
231 | ||
1ce7dd26 | 232 | mutex_unlock(&port->mutex); |
1da177e4 LT |
233 | return 0; |
234 | ||
235 | bailout_module_put: | |
18fcac35 | 236 | module_put(serial->type->driver.owner); |
71a84163 | 237 | bailout_mutex_unlock: |
1da177e4 | 238 | port->open_count = 0; |
b059c81a FG |
239 | tty->driver_data = NULL; |
240 | port->tty = NULL; | |
1ce7dd26 | 241 | mutex_unlock(&port->mutex); |
71a84163 | 242 | bailout_kref_put: |
73e487fd | 243 | usb_serial_put(serial); |
1da177e4 LT |
244 | return retval; |
245 | } | |
246 | ||
247 | static void serial_close(struct tty_struct *tty, struct file * filp) | |
248 | { | |
81671ddb | 249 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
250 | |
251 | if (!port) | |
252 | return; | |
253 | ||
254 | dbg("%s - port %d", __FUNCTION__, port->number); | |
255 | ||
1ce7dd26 | 256 | mutex_lock(&port->mutex); |
8a4613f0 | 257 | |
91c0bce2 | 258 | if (port->open_count == 0) { |
1ce7dd26 | 259 | mutex_unlock(&port->mutex); |
91c0bce2 GKH |
260 | return; |
261 | } | |
1da177e4 LT |
262 | |
263 | --port->open_count; | |
264 | if (port->open_count == 0) { | |
265 | /* only call the device specific close if this | |
266 | * port is being closed by the last owner */ | |
267 | port->serial->type->close(port, filp); | |
268 | ||
269 | if (port->tty) { | |
270 | if (port->tty->driver_data) | |
271 | port->tty->driver_data = NULL; | |
272 | port->tty = NULL; | |
273 | } | |
274 | ||
18fcac35 | 275 | module_put(port->serial->type->driver.owner); |
1da177e4 LT |
276 | } |
277 | ||
1ce7dd26 | 278 | mutex_unlock(&port->mutex); |
73e487fd | 279 | usb_serial_put(port->serial); |
1da177e4 LT |
280 | } |
281 | ||
282 | static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) | |
283 | { | |
81671ddb | 284 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
285 | int retval = -EINVAL; |
286 | ||
73e487fd | 287 | if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
288 | goto exit; |
289 | ||
1da177e4 LT |
290 | dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count); |
291 | ||
292 | if (!port->open_count) { | |
293 | dbg("%s - port not opened", __FUNCTION__); | |
294 | goto exit; | |
295 | } | |
296 | ||
297 | /* pass on to the driver specific version of this function */ | |
298 | retval = port->serial->type->write(port, buf, count); | |
299 | ||
300 | exit: | |
301 | return retval; | |
302 | } | |
303 | ||
304 | static int serial_write_room (struct tty_struct *tty) | |
305 | { | |
81671ddb | 306 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 307 | int retval = -ENODEV; |
1da177e4 | 308 | |
487f9c67 LFC |
309 | if (!port) |
310 | goto exit; | |
311 | ||
1da177e4 LT |
312 | dbg("%s - port %d", __FUNCTION__, port->number); |
313 | ||
314 | if (!port->open_count) { | |
315 | dbg("%s - port not open", __FUNCTION__); | |
316 | goto exit; | |
317 | } | |
318 | ||
319 | /* pass on to the driver specific version of this function */ | |
320 | retval = port->serial->type->write_room(port); | |
321 | ||
322 | exit: | |
323 | return retval; | |
324 | } | |
325 | ||
326 | static int serial_chars_in_buffer (struct tty_struct *tty) | |
327 | { | |
81671ddb | 328 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 329 | int retval = -ENODEV; |
1da177e4 | 330 | |
487f9c67 LFC |
331 | if (!port) |
332 | goto exit; | |
333 | ||
1da177e4 LT |
334 | dbg("%s = port %d", __FUNCTION__, port->number); |
335 | ||
336 | if (!port->open_count) { | |
337 | dbg("%s - port not open", __FUNCTION__); | |
338 | goto exit; | |
339 | } | |
340 | ||
341 | /* pass on to the driver specific version of this function */ | |
342 | retval = port->serial->type->chars_in_buffer(port); | |
343 | ||
344 | exit: | |
345 | return retval; | |
346 | } | |
347 | ||
348 | static void serial_throttle (struct tty_struct * tty) | |
349 | { | |
81671ddb | 350 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 351 | |
487f9c67 LFC |
352 | if (!port) |
353 | return; | |
354 | ||
1da177e4 LT |
355 | dbg("%s - port %d", __FUNCTION__, port->number); |
356 | ||
357 | if (!port->open_count) { | |
358 | dbg ("%s - port not open", __FUNCTION__); | |
359 | return; | |
360 | } | |
361 | ||
362 | /* pass on to the driver specific version of this function */ | |
363 | if (port->serial->type->throttle) | |
364 | port->serial->type->throttle(port); | |
365 | } | |
366 | ||
367 | static void serial_unthrottle (struct tty_struct * tty) | |
368 | { | |
81671ddb | 369 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 370 | |
487f9c67 LFC |
371 | if (!port) |
372 | return; | |
373 | ||
1da177e4 LT |
374 | dbg("%s - port %d", __FUNCTION__, port->number); |
375 | ||
376 | if (!port->open_count) { | |
377 | dbg("%s - port not open", __FUNCTION__); | |
378 | return; | |
379 | } | |
380 | ||
381 | /* pass on to the driver specific version of this function */ | |
382 | if (port->serial->type->unthrottle) | |
383 | port->serial->type->unthrottle(port); | |
384 | } | |
385 | ||
386 | static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) | |
387 | { | |
81671ddb | 388 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
389 | int retval = -ENODEV; |
390 | ||
487f9c67 LFC |
391 | if (!port) |
392 | goto exit; | |
393 | ||
1da177e4 LT |
394 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); |
395 | ||
396 | if (!port->open_count) { | |
397 | dbg ("%s - port not open", __FUNCTION__); | |
398 | goto exit; | |
399 | } | |
400 | ||
401 | /* pass on to the driver specific version of this function if it is available */ | |
402 | if (port->serial->type->ioctl) | |
403 | retval = port->serial->type->ioctl(port, file, cmd, arg); | |
404 | else | |
405 | retval = -ENOIOCTLCMD; | |
406 | ||
407 | exit: | |
408 | return retval; | |
409 | } | |
410 | ||
411 | static void serial_set_termios (struct tty_struct *tty, struct termios * old) | |
412 | { | |
81671ddb | 413 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 414 | |
487f9c67 LFC |
415 | if (!port) |
416 | return; | |
417 | ||
1da177e4 LT |
418 | dbg("%s - port %d", __FUNCTION__, port->number); |
419 | ||
420 | if (!port->open_count) { | |
421 | dbg("%s - port not open", __FUNCTION__); | |
422 | return; | |
423 | } | |
424 | ||
425 | /* pass on to the driver specific version of this function if it is available */ | |
426 | if (port->serial->type->set_termios) | |
427 | port->serial->type->set_termios(port, old); | |
428 | } | |
429 | ||
430 | static void serial_break (struct tty_struct *tty, int break_state) | |
431 | { | |
81671ddb | 432 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 433 | |
487f9c67 LFC |
434 | if (!port) |
435 | return; | |
436 | ||
1da177e4 LT |
437 | dbg("%s - port %d", __FUNCTION__, port->number); |
438 | ||
439 | if (!port->open_count) { | |
440 | dbg("%s - port not open", __FUNCTION__); | |
441 | return; | |
442 | } | |
443 | ||
444 | /* pass on to the driver specific version of this function if it is available */ | |
445 | if (port->serial->type->break_ctl) | |
446 | port->serial->type->break_ctl(port, break_state); | |
447 | } | |
448 | ||
449 | static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) | |
450 | { | |
451 | struct usb_serial *serial; | |
452 | int length = 0; | |
453 | int i; | |
454 | off_t begin = 0; | |
455 | char tmp[40]; | |
456 | ||
457 | dbg("%s", __FUNCTION__); | |
17a882fc | 458 | length += sprintf (page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
459 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
460 | serial = usb_serial_get_by_index(i); | |
461 | if (serial == NULL) | |
462 | continue; | |
463 | ||
464 | length += sprintf (page+length, "%d:", i); | |
18fcac35 GKH |
465 | if (serial->type->driver.owner) |
466 | length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner)); | |
269bda1c | 467 | length += sprintf (page+length, " name:\"%s\"", serial->type->description); |
1da177e4 LT |
468 | length += sprintf (page+length, " vendor:%04x product:%04x", |
469 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
470 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
471 | length += sprintf (page+length, " num_ports:%d", serial->num_ports); | |
472 | length += sprintf (page+length, " port:%d", i - serial->minor + 1); | |
473 | ||
474 | usb_make_path(serial->dev, tmp, sizeof(tmp)); | |
475 | length += sprintf (page+length, " path:%s", tmp); | |
476 | ||
477 | length += sprintf (page+length, "\n"); | |
478 | if ((length + begin) > (off + count)) | |
479 | goto done; | |
480 | if ((length + begin) < off) { | |
481 | begin += length; | |
482 | length = 0; | |
483 | } | |
73e487fd | 484 | usb_serial_put(serial); |
1da177e4 LT |
485 | } |
486 | *eof = 1; | |
487 | done: | |
488 | if (off >= (length + begin)) | |
489 | return 0; | |
490 | *start = page + (off-begin); | |
491 | return ((count < begin+length-off) ? count : begin+length-off); | |
492 | } | |
493 | ||
494 | static int serial_tiocmget (struct tty_struct *tty, struct file *file) | |
495 | { | |
81671ddb | 496 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 497 | |
487f9c67 | 498 | if (!port) |
db54a53d | 499 | return -ENODEV; |
487f9c67 | 500 | |
1da177e4 LT |
501 | dbg("%s - port %d", __FUNCTION__, port->number); |
502 | ||
503 | if (!port->open_count) { | |
504 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 505 | return -ENODEV; |
1da177e4 LT |
506 | } |
507 | ||
508 | if (port->serial->type->tiocmget) | |
509 | return port->serial->type->tiocmget(port, file); | |
510 | ||
1da177e4 LT |
511 | return -EINVAL; |
512 | } | |
513 | ||
514 | static int serial_tiocmset (struct tty_struct *tty, struct file *file, | |
515 | unsigned int set, unsigned int clear) | |
516 | { | |
81671ddb | 517 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 518 | |
487f9c67 | 519 | if (!port) |
db54a53d | 520 | return -ENODEV; |
487f9c67 | 521 | |
1da177e4 LT |
522 | dbg("%s - port %d", __FUNCTION__, port->number); |
523 | ||
524 | if (!port->open_count) { | |
525 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 526 | return -ENODEV; |
1da177e4 LT |
527 | } |
528 | ||
529 | if (port->serial->type->tiocmset) | |
530 | return port->serial->type->tiocmset(port, file, set, clear); | |
531 | ||
1da177e4 LT |
532 | return -EINVAL; |
533 | } | |
534 | ||
cf2c7481 PZ |
535 | /* |
536 | * We would be calling tty_wakeup here, but unfortunately some line | |
537 | * disciplines have an annoying habit of calling tty->write from | |
538 | * the write wakeup callback (e.g. n_hdlc.c). | |
539 | */ | |
540 | void usb_serial_port_softint(struct usb_serial_port *port) | |
541 | { | |
542 | schedule_work(&port->work); | |
543 | } | |
544 | ||
545 | static void usb_serial_port_work(void *private) | |
1da177e4 | 546 | { |
81671ddb | 547 | struct usb_serial_port *port = private; |
1da177e4 LT |
548 | struct tty_struct *tty; |
549 | ||
550 | dbg("%s - port %d", __FUNCTION__, port->number); | |
551 | ||
552 | if (!port) | |
553 | return; | |
554 | ||
555 | tty = port->tty; | |
556 | if (!tty) | |
557 | return; | |
558 | ||
559 | tty_wakeup(tty); | |
560 | } | |
561 | ||
562 | static void port_release(struct device *dev) | |
563 | { | |
564 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
565 | ||
566 | dbg ("%s - %s", __FUNCTION__, dev->bus_id); | |
567 | usb_kill_urb(port->read_urb); | |
568 | usb_free_urb(port->read_urb); | |
569 | usb_kill_urb(port->write_urb); | |
570 | usb_free_urb(port->write_urb); | |
571 | usb_kill_urb(port->interrupt_in_urb); | |
572 | usb_free_urb(port->interrupt_in_urb); | |
573 | usb_kill_urb(port->interrupt_out_urb); | |
574 | usb_free_urb(port->interrupt_out_urb); | |
575 | kfree(port->bulk_in_buffer); | |
576 | kfree(port->bulk_out_buffer); | |
577 | kfree(port->interrupt_in_buffer); | |
578 | kfree(port->interrupt_out_buffer); | |
579 | kfree(port); | |
580 | } | |
581 | ||
582 | static struct usb_serial * create_serial (struct usb_device *dev, | |
583 | struct usb_interface *interface, | |
ea65370d | 584 | struct usb_serial_driver *driver) |
1da177e4 LT |
585 | { |
586 | struct usb_serial *serial; | |
587 | ||
80b6ca48 | 588 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 LT |
589 | if (!serial) { |
590 | dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); | |
591 | return NULL; | |
592 | } | |
1da177e4 | 593 | serial->dev = usb_get_dev(dev); |
ea65370d | 594 | serial->type = driver; |
1da177e4 LT |
595 | serial->interface = interface; |
596 | kref_init(&serial->kref); | |
597 | ||
598 | return serial; | |
599 | } | |
600 | ||
ea65370d | 601 | static struct usb_serial_driver *search_serial_device(struct usb_interface *iface) |
1da177e4 LT |
602 | { |
603 | struct list_head *p; | |
604 | const struct usb_device_id *id; | |
ea65370d | 605 | struct usb_serial_driver *t; |
1da177e4 | 606 | |
93b1fae4 | 607 | /* Check if the usb id matches a known device */ |
1da177e4 | 608 | list_for_each(p, &usb_serial_driver_list) { |
ea65370d | 609 | t = list_entry(p, struct usb_serial_driver, driver_list); |
1da177e4 LT |
610 | id = usb_match_id(iface, t->id_table); |
611 | if (id != NULL) { | |
612 | dbg("descriptor matches"); | |
613 | return t; | |
614 | } | |
615 | } | |
616 | ||
617 | return NULL; | |
618 | } | |
619 | ||
620 | int usb_serial_probe(struct usb_interface *interface, | |
621 | const struct usb_device_id *id) | |
622 | { | |
623 | struct usb_device *dev = interface_to_usbdev (interface); | |
624 | struct usb_serial *serial = NULL; | |
625 | struct usb_serial_port *port; | |
626 | struct usb_host_interface *iface_desc; | |
627 | struct usb_endpoint_descriptor *endpoint; | |
628 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
629 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
630 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
631 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 632 | struct usb_serial_driver *type = NULL; |
1da177e4 LT |
633 | int retval; |
634 | int minor; | |
635 | int buffer_size; | |
636 | int i; | |
637 | int num_interrupt_in = 0; | |
638 | int num_interrupt_out = 0; | |
639 | int num_bulk_in = 0; | |
640 | int num_bulk_out = 0; | |
641 | int num_ports = 0; | |
642 | int max_endpoints; | |
643 | ||
644 | type = search_serial_device(interface); | |
645 | if (!type) { | |
646 | dbg("none matched"); | |
647 | return -ENODEV; | |
648 | } | |
649 | ||
650 | serial = create_serial (dev, interface, type); | |
651 | if (!serial) { | |
652 | dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); | |
653 | return -ENOMEM; | |
654 | } | |
655 | ||
656 | /* if this device type has a probe function, call it */ | |
657 | if (type->probe) { | |
658 | const struct usb_device_id *id; | |
659 | ||
18fcac35 | 660 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
661 | dev_err(&interface->dev, "module get failed, exiting\n"); |
662 | kfree (serial); | |
663 | return -EIO; | |
664 | } | |
665 | ||
666 | id = usb_match_id(interface, type->id_table); | |
667 | retval = type->probe(serial, id); | |
18fcac35 | 668 | module_put(type->driver.owner); |
1da177e4 LT |
669 | |
670 | if (retval) { | |
671 | dbg ("sub driver rejected device"); | |
672 | kfree (serial); | |
673 | return retval; | |
674 | } | |
675 | } | |
676 | ||
677 | /* descriptor matches, let's find the endpoints needed */ | |
678 | /* check out the endpoints */ | |
679 | iface_desc = interface->cur_altsetting; | |
680 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
681 | endpoint = &iface_desc->endpoint[i].desc; | |
682 | ||
683 | if ((endpoint->bEndpointAddress & 0x80) && | |
684 | ((endpoint->bmAttributes & 3) == 0x02)) { | |
685 | /* we found a bulk in endpoint */ | |
686 | dbg("found bulk in on endpoint %d", i); | |
687 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
688 | ++num_bulk_in; | |
689 | } | |
690 | ||
691 | if (((endpoint->bEndpointAddress & 0x80) == 0x00) && | |
692 | ((endpoint->bmAttributes & 3) == 0x02)) { | |
693 | /* we found a bulk out endpoint */ | |
694 | dbg("found bulk out on endpoint %d", i); | |
695 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
696 | ++num_bulk_out; | |
697 | } | |
698 | ||
699 | if ((endpoint->bEndpointAddress & 0x80) && | |
700 | ((endpoint->bmAttributes & 3) == 0x03)) { | |
701 | /* we found a interrupt in endpoint */ | |
702 | dbg("found interrupt in on endpoint %d", i); | |
703 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
704 | ++num_interrupt_in; | |
705 | } | |
706 | ||
707 | if (((endpoint->bEndpointAddress & 0x80) == 0x00) && | |
708 | ((endpoint->bmAttributes & 3) == 0x03)) { | |
709 | /* we found an interrupt out endpoint */ | |
710 | dbg("found interrupt out on endpoint %d", i); | |
711 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
712 | ++num_interrupt_out; | |
713 | } | |
714 | } | |
715 | ||
716 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
717 | /* BEGIN HORRIBLE HACK FOR PL2303 */ | |
718 | /* this is needed due to the looney way its endpoints are set up */ | |
719 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
720 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
721 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
722 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID))) { | |
723 | if (interface != dev->actconfig->interface[0]) { | |
724 | /* check out the endpoints of the other interface*/ | |
725 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
726 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
727 | endpoint = &iface_desc->endpoint[i].desc; | |
728 | if ((endpoint->bEndpointAddress & 0x80) && | |
729 | ((endpoint->bmAttributes & 3) == 0x03)) { | |
730 | /* we found a interrupt in endpoint */ | |
731 | dbg("found interrupt in for Prolific device on separate interface"); | |
732 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
733 | ++num_interrupt_in; | |
734 | } | |
735 | } | |
736 | } | |
737 | ||
738 | /* Now make sure the PL-2303 is configured correctly. | |
739 | * If not, give up now and hope this hack will work | |
740 | * properly during a later invocation of usb_serial_probe | |
741 | */ | |
742 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
743 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); | |
744 | kfree (serial); | |
745 | return -ENODEV; | |
746 | } | |
747 | } | |
748 | /* END HORRIBLE HACK FOR PL2303 */ | |
749 | #endif | |
750 | ||
751 | /* found all that we need */ | |
269bda1c | 752 | dev_info(&interface->dev, "%s converter detected\n", type->description); |
1da177e4 LT |
753 | |
754 | #ifdef CONFIG_USB_SERIAL_GENERIC | |
755 | if (type == &usb_serial_generic_device) { | |
756 | num_ports = num_bulk_out; | |
757 | if (num_ports == 0) { | |
758 | dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n"); | |
759 | kfree (serial); | |
760 | return -EIO; | |
761 | } | |
762 | } | |
763 | #endif | |
764 | if (!num_ports) { | |
765 | /* if this device type has a calc_num_ports function, call it */ | |
766 | if (type->calc_num_ports) { | |
18fcac35 | 767 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
768 | dev_err(&interface->dev, "module get failed, exiting\n"); |
769 | kfree (serial); | |
770 | return -EIO; | |
771 | } | |
772 | num_ports = type->calc_num_ports (serial); | |
18fcac35 | 773 | module_put(type->driver.owner); |
1da177e4 LT |
774 | } |
775 | if (!num_ports) | |
776 | num_ports = type->num_ports; | |
777 | } | |
778 | ||
779 | if (get_free_serial (serial, num_ports, &minor) == NULL) { | |
780 | dev_err(&interface->dev, "No more free serial devices\n"); | |
781 | kfree (serial); | |
782 | return -ENOMEM; | |
783 | } | |
784 | ||
785 | serial->minor = minor; | |
786 | serial->num_ports = num_ports; | |
787 | serial->num_bulk_in = num_bulk_in; | |
788 | serial->num_bulk_out = num_bulk_out; | |
789 | serial->num_interrupt_in = num_interrupt_in; | |
790 | serial->num_interrupt_out = num_interrupt_out; | |
791 | ||
792 | /* create our ports, we need as many as the max endpoints */ | |
793 | /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */ | |
794 | max_endpoints = max(num_bulk_in, num_bulk_out); | |
795 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
796 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
797 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
798 | serial->num_port_pointers = max_endpoints; | |
799 | dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints); | |
800 | for (i = 0; i < max_endpoints; ++i) { | |
80b6ca48 | 801 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
802 | if (!port) |
803 | goto probe_error; | |
1da177e4 LT |
804 | port->number = i + serial->minor; |
805 | port->serial = serial; | |
507ca9bc | 806 | spin_lock_init(&port->lock); |
1ce7dd26 | 807 | mutex_init(&port->mutex); |
cf2c7481 | 808 | INIT_WORK(&port->work, usb_serial_port_work, port); |
1da177e4 LT |
809 | serial->port[i] = port; |
810 | } | |
811 | ||
812 | /* set up the endpoint information */ | |
813 | for (i = 0; i < num_bulk_in; ++i) { | |
814 | endpoint = bulk_in_endpoint[i]; | |
815 | port = serial->port[i]; | |
816 | port->read_urb = usb_alloc_urb (0, GFP_KERNEL); | |
817 | if (!port->read_urb) { | |
818 | dev_err(&interface->dev, "No free urbs available\n"); | |
819 | goto probe_error; | |
820 | } | |
821 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
822 | port->bulk_in_size = buffer_size; | |
823 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
824 | port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
825 | if (!port->bulk_in_buffer) { | |
826 | dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n"); | |
827 | goto probe_error; | |
828 | } | |
829 | usb_fill_bulk_urb (port->read_urb, dev, | |
830 | usb_rcvbulkpipe (dev, | |
831 | endpoint->bEndpointAddress), | |
832 | port->bulk_in_buffer, buffer_size, | |
833 | serial->type->read_bulk_callback, | |
834 | port); | |
835 | } | |
836 | ||
837 | for (i = 0; i < num_bulk_out; ++i) { | |
838 | endpoint = bulk_out_endpoint[i]; | |
839 | port = serial->port[i]; | |
840 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
841 | if (!port->write_urb) { | |
842 | dev_err(&interface->dev, "No free urbs available\n"); | |
843 | goto probe_error; | |
844 | } | |
845 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
846 | port->bulk_out_size = buffer_size; | |
847 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
848 | port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
849 | if (!port->bulk_out_buffer) { | |
850 | dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n"); | |
851 | goto probe_error; | |
852 | } | |
853 | usb_fill_bulk_urb (port->write_urb, dev, | |
854 | usb_sndbulkpipe (dev, | |
855 | endpoint->bEndpointAddress), | |
856 | port->bulk_out_buffer, buffer_size, | |
857 | serial->type->write_bulk_callback, | |
858 | port); | |
859 | } | |
860 | ||
861 | if (serial->type->read_int_callback) { | |
862 | for (i = 0; i < num_interrupt_in; ++i) { | |
863 | endpoint = interrupt_in_endpoint[i]; | |
864 | port = serial->port[i]; | |
865 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
866 | if (!port->interrupt_in_urb) { | |
867 | dev_err(&interface->dev, "No free urbs available\n"); | |
868 | goto probe_error; | |
869 | } | |
870 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
871 | port->interrupt_in_endpointAddress = endpoint->bEndpointAddress; | |
872 | port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
873 | if (!port->interrupt_in_buffer) { | |
874 | dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n"); | |
875 | goto probe_error; | |
876 | } | |
877 | usb_fill_int_urb (port->interrupt_in_urb, dev, | |
878 | usb_rcvintpipe (dev, | |
879 | endpoint->bEndpointAddress), | |
880 | port->interrupt_in_buffer, buffer_size, | |
881 | serial->type->read_int_callback, port, | |
882 | endpoint->bInterval); | |
883 | } | |
884 | } else if (num_interrupt_in) { | |
885 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
886 | } | |
887 | ||
888 | if (serial->type->write_int_callback) { | |
889 | for (i = 0; i < num_interrupt_out; ++i) { | |
890 | endpoint = interrupt_out_endpoint[i]; | |
891 | port = serial->port[i]; | |
892 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
893 | if (!port->interrupt_out_urb) { | |
894 | dev_err(&interface->dev, "No free urbs available\n"); | |
895 | goto probe_error; | |
896 | } | |
897 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
898 | port->interrupt_out_size = buffer_size; | |
899 | port->interrupt_out_endpointAddress = endpoint->bEndpointAddress; | |
900 | port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
901 | if (!port->interrupt_out_buffer) { | |
902 | dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n"); | |
903 | goto probe_error; | |
904 | } | |
905 | usb_fill_int_urb (port->interrupt_out_urb, dev, | |
906 | usb_sndintpipe (dev, | |
907 | endpoint->bEndpointAddress), | |
908 | port->interrupt_out_buffer, buffer_size, | |
909 | serial->type->write_int_callback, port, | |
910 | endpoint->bInterval); | |
911 | } | |
912 | } else if (num_interrupt_out) { | |
913 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
914 | } | |
915 | ||
916 | /* if this device type has an attach function, call it */ | |
917 | if (type->attach) { | |
18fcac35 | 918 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
919 | dev_err(&interface->dev, "module get failed, exiting\n"); |
920 | goto probe_error; | |
921 | } | |
922 | retval = type->attach (serial); | |
18fcac35 | 923 | module_put(type->driver.owner); |
1da177e4 LT |
924 | if (retval < 0) |
925 | goto probe_error; | |
926 | if (retval > 0) { | |
927 | /* quietly accept this device, but don't bind to a serial port | |
928 | * as it's about to disappear */ | |
929 | goto exit; | |
930 | } | |
931 | } | |
932 | ||
933 | /* register all of the individual ports with the driver core */ | |
934 | for (i = 0; i < num_ports; ++i) { | |
935 | port = serial->port[i]; | |
936 | port->dev.parent = &interface->dev; | |
937 | port->dev.driver = NULL; | |
938 | port->dev.bus = &usb_serial_bus_type; | |
939 | port->dev.release = &port_release; | |
940 | ||
941 | snprintf (&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number); | |
942 | dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id); | |
943 | device_register (&port->dev); | |
944 | } | |
945 | ||
946 | usb_serial_console_init (debug, minor); | |
947 | ||
948 | exit: | |
949 | /* success */ | |
950 | usb_set_intfdata (interface, serial); | |
951 | return 0; | |
952 | ||
953 | probe_error: | |
954 | for (i = 0; i < num_bulk_in; ++i) { | |
955 | port = serial->port[i]; | |
956 | if (!port) | |
957 | continue; | |
958 | if (port->read_urb) | |
959 | usb_free_urb (port->read_urb); | |
960 | kfree(port->bulk_in_buffer); | |
961 | } | |
962 | for (i = 0; i < num_bulk_out; ++i) { | |
963 | port = serial->port[i]; | |
964 | if (!port) | |
965 | continue; | |
966 | if (port->write_urb) | |
967 | usb_free_urb (port->write_urb); | |
968 | kfree(port->bulk_out_buffer); | |
969 | } | |
970 | for (i = 0; i < num_interrupt_in; ++i) { | |
971 | port = serial->port[i]; | |
972 | if (!port) | |
973 | continue; | |
974 | if (port->interrupt_in_urb) | |
975 | usb_free_urb (port->interrupt_in_urb); | |
976 | kfree(port->interrupt_in_buffer); | |
977 | } | |
978 | for (i = 0; i < num_interrupt_out; ++i) { | |
979 | port = serial->port[i]; | |
980 | if (!port) | |
981 | continue; | |
982 | if (port->interrupt_out_urb) | |
983 | usb_free_urb (port->interrupt_out_urb); | |
984 | kfree(port->interrupt_out_buffer); | |
985 | } | |
986 | ||
987 | /* return the minor range that this device had */ | |
988 | return_serial (serial); | |
989 | ||
990 | /* free up any memory that we allocated */ | |
991 | for (i = 0; i < serial->num_port_pointers; ++i) | |
992 | kfree(serial->port[i]); | |
993 | kfree (serial); | |
994 | return -EIO; | |
995 | } | |
996 | ||
997 | void usb_serial_disconnect(struct usb_interface *interface) | |
998 | { | |
999 | int i; | |
1000 | struct usb_serial *serial = usb_get_intfdata (interface); | |
1001 | struct device *dev = &interface->dev; | |
1002 | struct usb_serial_port *port; | |
1003 | ||
73e487fd | 1004 | usb_serial_console_disconnect(serial); |
1da177e4 LT |
1005 | dbg ("%s", __FUNCTION__); |
1006 | ||
1007 | usb_set_intfdata (interface, NULL); | |
1008 | if (serial) { | |
1009 | for (i = 0; i < serial->num_ports; ++i) { | |
1010 | port = serial->port[i]; | |
1011 | if (port && port->tty) | |
1012 | tty_hangup(port->tty); | |
1013 | } | |
1014 | /* let the last holder of this object | |
1015 | * cause it to be cleaned up */ | |
73e487fd | 1016 | usb_serial_put(serial); |
1da177e4 LT |
1017 | } |
1018 | dev_info(dev, "device disconnected\n"); | |
1019 | } | |
1020 | ||
1021 | static struct tty_operations serial_ops = { | |
1022 | .open = serial_open, | |
1023 | .close = serial_close, | |
1024 | .write = serial_write, | |
1025 | .write_room = serial_write_room, | |
1026 | .ioctl = serial_ioctl, | |
1027 | .set_termios = serial_set_termios, | |
1028 | .throttle = serial_throttle, | |
1029 | .unthrottle = serial_unthrottle, | |
1030 | .break_ctl = serial_break, | |
1031 | .chars_in_buffer = serial_chars_in_buffer, | |
1032 | .read_proc = serial_read_proc, | |
1033 | .tiocmget = serial_tiocmget, | |
1034 | .tiocmset = serial_tiocmset, | |
1035 | }; | |
1036 | ||
1037 | struct tty_driver *usb_serial_tty_driver; | |
1038 | ||
1039 | static int __init usb_serial_init(void) | |
1040 | { | |
1041 | int i; | |
1042 | int result; | |
1043 | ||
1044 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1045 | if (!usb_serial_tty_driver) | |
1046 | return -ENOMEM; | |
1047 | ||
1048 | /* Initialize our global data */ | |
1049 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1050 | serial_table[i] = NULL; | |
1051 | } | |
1052 | ||
1053 | result = bus_register(&usb_serial_bus_type); | |
1054 | if (result) { | |
1055 | err("%s - registering bus driver failed", __FUNCTION__); | |
1056 | goto exit_bus; | |
1057 | } | |
1058 | ||
1da177e4 LT |
1059 | usb_serial_tty_driver->owner = THIS_MODULE; |
1060 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1061 | usb_serial_tty_driver->name = "ttyUSB"; |
1062 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1063 | usb_serial_tty_driver->minor_start = 0; | |
1064 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1065 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
331b8319 | 1066 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1067 | usb_serial_tty_driver->init_termios = tty_std_termios; |
1068 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1069 | tty_set_operations(usb_serial_tty_driver, &serial_ops); | |
1070 | result = tty_register_driver(usb_serial_tty_driver); | |
1071 | if (result) { | |
1072 | err("%s - tty_register_driver failed", __FUNCTION__); | |
1073 | goto exit_reg_driver; | |
1074 | } | |
1075 | ||
1076 | /* register the USB driver */ | |
1077 | result = usb_register(&usb_serial_driver); | |
1078 | if (result < 0) { | |
1079 | err("%s - usb_register failed", __FUNCTION__); | |
1080 | goto exit_tty; | |
1081 | } | |
1082 | ||
06299db3 GKH |
1083 | /* register the generic driver, if we should */ |
1084 | result = usb_serial_generic_register(debug); | |
1085 | if (result < 0) { | |
1086 | err("%s - registering generic driver failed", __FUNCTION__); | |
1087 | goto exit_generic; | |
1088 | } | |
1089 | ||
17a882fc | 1090 | info(DRIVER_DESC); |
1da177e4 LT |
1091 | |
1092 | return result; | |
1093 | ||
06299db3 GKH |
1094 | exit_generic: |
1095 | usb_deregister(&usb_serial_driver); | |
1096 | ||
1da177e4 LT |
1097 | exit_tty: |
1098 | tty_unregister_driver(usb_serial_tty_driver); | |
1099 | ||
1100 | exit_reg_driver: | |
1da177e4 LT |
1101 | bus_unregister(&usb_serial_bus_type); |
1102 | ||
1103 | exit_bus: | |
1104 | err ("%s - returning with error %d", __FUNCTION__, result); | |
1105 | put_tty_driver(usb_serial_tty_driver); | |
1106 | return result; | |
1107 | } | |
1108 | ||
1109 | ||
1110 | static void __exit usb_serial_exit(void) | |
1111 | { | |
1112 | usb_serial_console_exit(); | |
1113 | ||
1114 | usb_serial_generic_deregister(); | |
1115 | ||
1116 | usb_deregister(&usb_serial_driver); | |
1117 | tty_unregister_driver(usb_serial_tty_driver); | |
1118 | put_tty_driver(usb_serial_tty_driver); | |
1119 | bus_unregister(&usb_serial_bus_type); | |
1120 | } | |
1121 | ||
1122 | ||
1123 | module_init(usb_serial_init); | |
1124 | module_exit(usb_serial_exit); | |
1125 | ||
1126 | #define set_to_generic_if_null(type, function) \ | |
1127 | do { \ | |
1128 | if (!type->function) { \ | |
1129 | type->function = usb_serial_generic_##function; \ | |
1130 | dbg("Had to override the " #function \ | |
1131 | " usb serial operation with the generic one.");\ | |
1132 | } \ | |
1133 | } while (0) | |
1134 | ||
ea65370d | 1135 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1136 | { |
1137 | set_to_generic_if_null(device, open); | |
1138 | set_to_generic_if_null(device, write); | |
1139 | set_to_generic_if_null(device, close); | |
1140 | set_to_generic_if_null(device, write_room); | |
1141 | set_to_generic_if_null(device, chars_in_buffer); | |
1142 | set_to_generic_if_null(device, read_bulk_callback); | |
1143 | set_to_generic_if_null(device, write_bulk_callback); | |
1144 | set_to_generic_if_null(device, shutdown); | |
1145 | } | |
1146 | ||
ea65370d | 1147 | int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 LT |
1148 | { |
1149 | int retval; | |
1150 | ||
ea65370d | 1151 | fixup_generic(driver); |
1da177e4 | 1152 | |
269bda1c GKH |
1153 | if (!driver->description) |
1154 | driver->description = driver->driver.name; | |
1155 | ||
1da177e4 | 1156 | /* Add this device to our list of devices */ |
ea65370d | 1157 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1158 | |
ea65370d | 1159 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1160 | if (retval) { |
269bda1c | 1161 | err("problem %d when registering driver %s", retval, driver->description); |
ea65370d | 1162 | list_del(&driver->driver_list); |
1da177e4 LT |
1163 | } |
1164 | else | |
269bda1c | 1165 | info("USB Serial support registered for %s", driver->description); |
1da177e4 LT |
1166 | |
1167 | return retval; | |
1168 | } | |
1169 | ||
1170 | ||
ea65370d | 1171 | void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1172 | { |
269bda1c | 1173 | info("USB Serial deregistering driver %s", device->description); |
1da177e4 LT |
1174 | list_del(&device->driver_list); |
1175 | usb_serial_bus_deregister(device); | |
1176 | } | |
1177 | ||
1178 | ||
1179 | ||
1180 | /* If the usb-serial core is built into the core, the usb-serial drivers | |
1181 | need these symbols to load properly as modules. */ | |
1182 | EXPORT_SYMBOL_GPL(usb_serial_register); | |
1183 | EXPORT_SYMBOL_GPL(usb_serial_deregister); | |
1184 | EXPORT_SYMBOL_GPL(usb_serial_probe); | |
1185 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); | |
1186 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); | |
1187 | ||
1188 | ||
1189 | /* Module information */ | |
1190 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1191 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1da177e4 LT |
1192 | MODULE_LICENSE("GPL"); |
1193 | ||
1194 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1195 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |