Commit | Line | Data |
---|---|---|
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 | ||
19 | #include <linux/config.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/tty.h> | |
25 | #include <linux/tty_driver.h> | |
26 | #include <linux/tty_flip.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/moduleparam.h> | |
29 | #include <linux/spinlock.h> | |
1ce7dd26 | 30 | #include <linux/mutex.h> |
1da177e4 LT |
31 | #include <linux/list.h> |
32 | #include <linux/smp_lock.h> | |
33 | #include <asm/uaccess.h> | |
34 | #include <linux/usb.h> | |
35 | #include "usb-serial.h" | |
36 | #include "pl2303.h" | |
37 | ||
38 | /* | |
39 | * Version Information | |
40 | */ | |
1da177e4 LT |
41 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
42 | #define DRIVER_DESC "USB Serial Driver core" | |
43 | ||
44 | /* Driver structure we register with the USB core */ | |
45 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
46 | .name = "usbserial", |
47 | .probe = usb_serial_probe, | |
48 | .disconnect = usb_serial_disconnect, | |
ba9dc657 | 49 | .no_dynamic_id = 1, |
1da177e4 LT |
50 | }; |
51 | ||
52 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
53 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
54 | cause the "hotplug" program to pull in whatever module is necessary | |
55 | via modprobe, and modprobe will load usbserial because the serial | |
56 | drivers depend on it. | |
57 | */ | |
58 | ||
59 | static int debug; | |
60 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; /* initially all NULL */ | |
61 | static LIST_HEAD(usb_serial_driver_list); | |
62 | ||
63 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
64 | { | |
65 | struct usb_serial *serial = serial_table[index]; | |
66 | ||
67 | if (serial) | |
68 | kref_get(&serial->kref); | |
69 | return serial; | |
70 | } | |
71 | ||
72 | static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor) | |
73 | { | |
74 | unsigned int i, j; | |
75 | int good_spot; | |
76 | ||
77 | dbg("%s %d", __FUNCTION__, num_ports); | |
78 | ||
79 | *minor = 0; | |
80 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
81 | if (serial_table[i]) | |
82 | continue; | |
83 | ||
84 | good_spot = 1; | |
85 | for (j = 1; j <= num_ports-1; ++j) | |
86 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
87 | good_spot = 0; | |
88 | i += j; | |
89 | break; | |
90 | } | |
91 | if (good_spot == 0) | |
92 | continue; | |
93 | ||
94 | *minor = i; | |
95 | dbg("%s - minor base = %d", __FUNCTION__, *minor); | |
96 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) | |
97 | serial_table[i] = serial; | |
98 | return serial; | |
99 | } | |
100 | return NULL; | |
101 | } | |
102 | ||
103 | static void return_serial(struct usb_serial *serial) | |
104 | { | |
105 | int i; | |
106 | ||
107 | dbg("%s", __FUNCTION__); | |
108 | ||
109 | if (serial == NULL) | |
110 | return; | |
111 | ||
112 | for (i = 0; i < serial->num_ports; ++i) { | |
113 | serial_table[serial->minor + i] = NULL; | |
114 | } | |
115 | } | |
116 | ||
117 | static void destroy_serial(struct kref *kref) | |
118 | { | |
119 | struct usb_serial *serial; | |
120 | struct usb_serial_port *port; | |
121 | int i; | |
122 | ||
123 | serial = to_usb_serial(kref); | |
124 | ||
269bda1c | 125 | dbg("%s - %s", __FUNCTION__, serial->type->description); |
1da177e4 LT |
126 | |
127 | serial->type->shutdown(serial); | |
128 | ||
129 | /* return the minor range that this device had */ | |
130 | return_serial(serial); | |
131 | ||
132 | for (i = 0; i < serial->num_ports; ++i) | |
133 | serial->port[i]->open_count = 0; | |
134 | ||
135 | /* the ports are cleaned up and released in port_release() */ | |
136 | for (i = 0; i < serial->num_ports; ++i) | |
137 | if (serial->port[i]->dev.parent != NULL) { | |
138 | device_unregister(&serial->port[i]->dev); | |
139 | serial->port[i] = NULL; | |
140 | } | |
141 | ||
142 | /* If this is a "fake" port, we have to clean it up here, as it will | |
143 | * not get cleaned up in port_release() as it was never registered with | |
144 | * the driver core */ | |
145 | if (serial->num_ports < serial->num_port_pointers) { | |
146 | for (i = serial->num_ports; i < serial->num_port_pointers; ++i) { | |
147 | port = serial->port[i]; | |
148 | if (!port) | |
149 | continue; | |
150 | usb_kill_urb(port->read_urb); | |
151 | usb_free_urb(port->read_urb); | |
152 | usb_kill_urb(port->write_urb); | |
153 | usb_free_urb(port->write_urb); | |
154 | usb_kill_urb(port->interrupt_in_urb); | |
155 | usb_free_urb(port->interrupt_in_urb); | |
156 | usb_kill_urb(port->interrupt_out_urb); | |
157 | usb_free_urb(port->interrupt_out_urb); | |
158 | kfree(port->bulk_in_buffer); | |
159 | kfree(port->bulk_out_buffer); | |
160 | kfree(port->interrupt_in_buffer); | |
161 | kfree(port->interrupt_out_buffer); | |
162 | } | |
163 | } | |
164 | ||
2f8ad9a1 PZ |
165 | flush_scheduled_work(); /* port->work */ |
166 | ||
1da177e4 LT |
167 | usb_put_dev(serial->dev); |
168 | ||
169 | /* free up any memory that we allocated */ | |
170 | kfree (serial); | |
171 | } | |
172 | ||
73e487fd GL |
173 | void usb_serial_put(struct usb_serial *serial) |
174 | { | |
175 | kref_put(&serial->kref, destroy_serial); | |
176 | } | |
177 | ||
1da177e4 LT |
178 | /***************************************************************************** |
179 | * Driver tty interface functions | |
180 | *****************************************************************************/ | |
181 | static int serial_open (struct tty_struct *tty, struct file * filp) | |
182 | { | |
183 | struct usb_serial *serial; | |
184 | struct usb_serial_port *port; | |
185 | unsigned int portNumber; | |
186 | int retval; | |
187 | ||
188 | dbg("%s", __FUNCTION__); | |
189 | ||
190 | /* get the serial object associated with this tty pointer */ | |
191 | serial = usb_serial_get_by_index(tty->index); | |
192 | if (!serial) { | |
193 | tty->driver_data = NULL; | |
194 | return -ENODEV; | |
195 | } | |
196 | ||
197 | portNumber = tty->index - serial->minor; | |
198 | port = serial->port[portNumber]; | |
71a84163 LFC |
199 | if (!port) { |
200 | retval = -ENODEV; | |
201 | goto bailout_kref_put; | |
202 | } | |
8a4613f0 | 203 | |
71a84163 LFC |
204 | if (mutex_lock_interruptible(&port->mutex)) { |
205 | retval = -ERESTARTSYS; | |
206 | goto bailout_kref_put; | |
207 | } | |
1da177e4 LT |
208 | |
209 | ++port->open_count; | |
210 | ||
ca85485c PF |
211 | /* set up our port structure making the tty driver |
212 | * remember our port object, and us it */ | |
213 | tty->driver_data = port; | |
214 | port->tty = tty; | |
1da177e4 | 215 | |
ca85485c | 216 | if (port->open_count == 1) { |
1da177e4 LT |
217 | |
218 | /* lock this module before we call it | |
219 | * this may fail, which means we must bail out, | |
220 | * safe because we are called with BKL held */ | |
18fcac35 | 221 | if (!try_module_get(serial->type->driver.owner)) { |
1da177e4 | 222 | retval = -ENODEV; |
71a84163 | 223 | goto bailout_mutex_unlock; |
1da177e4 LT |
224 | } |
225 | ||
226 | /* only call the device specific open if this | |
227 | * is the first time the port is opened */ | |
228 | retval = serial->type->open(port, filp); | |
229 | if (retval) | |
230 | goto bailout_module_put; | |
231 | } | |
232 | ||
1ce7dd26 | 233 | mutex_unlock(&port->mutex); |
1da177e4 LT |
234 | return 0; |
235 | ||
236 | bailout_module_put: | |
18fcac35 | 237 | module_put(serial->type->driver.owner); |
71a84163 | 238 | bailout_mutex_unlock: |
1da177e4 | 239 | port->open_count = 0; |
b059c81a FG |
240 | tty->driver_data = NULL; |
241 | port->tty = NULL; | |
1ce7dd26 | 242 | mutex_unlock(&port->mutex); |
71a84163 | 243 | bailout_kref_put: |
73e487fd | 244 | usb_serial_put(serial); |
1da177e4 LT |
245 | return retval; |
246 | } | |
247 | ||
248 | static void serial_close(struct tty_struct *tty, struct file * filp) | |
249 | { | |
81671ddb | 250 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
251 | |
252 | if (!port) | |
253 | return; | |
254 | ||
255 | dbg("%s - port %d", __FUNCTION__, port->number); | |
256 | ||
1ce7dd26 | 257 | mutex_lock(&port->mutex); |
8a4613f0 | 258 | |
91c0bce2 | 259 | if (port->open_count == 0) { |
1ce7dd26 | 260 | mutex_unlock(&port->mutex); |
91c0bce2 GKH |
261 | return; |
262 | } | |
1da177e4 LT |
263 | |
264 | --port->open_count; | |
265 | if (port->open_count == 0) { | |
266 | /* only call the device specific close if this | |
267 | * port is being closed by the last owner */ | |
268 | port->serial->type->close(port, filp); | |
269 | ||
270 | if (port->tty) { | |
271 | if (port->tty->driver_data) | |
272 | port->tty->driver_data = NULL; | |
273 | port->tty = NULL; | |
274 | } | |
275 | ||
18fcac35 | 276 | module_put(port->serial->type->driver.owner); |
1da177e4 LT |
277 | } |
278 | ||
1ce7dd26 | 279 | mutex_unlock(&port->mutex); |
73e487fd | 280 | usb_serial_put(port->serial); |
1da177e4 LT |
281 | } |
282 | ||
283 | static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) | |
284 | { | |
81671ddb | 285 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
286 | int retval = -EINVAL; |
287 | ||
73e487fd | 288 | if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
289 | goto exit; |
290 | ||
1da177e4 LT |
291 | dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count); |
292 | ||
293 | if (!port->open_count) { | |
294 | dbg("%s - port not opened", __FUNCTION__); | |
295 | goto exit; | |
296 | } | |
297 | ||
298 | /* pass on to the driver specific version of this function */ | |
299 | retval = port->serial->type->write(port, buf, count); | |
300 | ||
301 | exit: | |
302 | return retval; | |
303 | } | |
304 | ||
305 | static int serial_write_room (struct tty_struct *tty) | |
306 | { | |
81671ddb | 307 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 308 | int retval = -ENODEV; |
1da177e4 | 309 | |
487f9c67 LFC |
310 | if (!port) |
311 | goto exit; | |
312 | ||
1da177e4 LT |
313 | dbg("%s - port %d", __FUNCTION__, port->number); |
314 | ||
315 | if (!port->open_count) { | |
316 | dbg("%s - port not open", __FUNCTION__); | |
317 | goto exit; | |
318 | } | |
319 | ||
320 | /* pass on to the driver specific version of this function */ | |
321 | retval = port->serial->type->write_room(port); | |
322 | ||
323 | exit: | |
324 | return retval; | |
325 | } | |
326 | ||
327 | static int serial_chars_in_buffer (struct tty_struct *tty) | |
328 | { | |
81671ddb | 329 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 330 | int retval = -ENODEV; |
1da177e4 | 331 | |
487f9c67 LFC |
332 | if (!port) |
333 | goto exit; | |
334 | ||
1da177e4 LT |
335 | dbg("%s = port %d", __FUNCTION__, port->number); |
336 | ||
337 | if (!port->open_count) { | |
338 | dbg("%s - port not open", __FUNCTION__); | |
339 | goto exit; | |
340 | } | |
341 | ||
342 | /* pass on to the driver specific version of this function */ | |
343 | retval = port->serial->type->chars_in_buffer(port); | |
344 | ||
345 | exit: | |
346 | return retval; | |
347 | } | |
348 | ||
349 | static void serial_throttle (struct tty_struct * tty) | |
350 | { | |
81671ddb | 351 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 352 | |
487f9c67 LFC |
353 | if (!port) |
354 | return; | |
355 | ||
1da177e4 LT |
356 | dbg("%s - port %d", __FUNCTION__, port->number); |
357 | ||
358 | if (!port->open_count) { | |
359 | dbg ("%s - port not open", __FUNCTION__); | |
360 | return; | |
361 | } | |
362 | ||
363 | /* pass on to the driver specific version of this function */ | |
364 | if (port->serial->type->throttle) | |
365 | port->serial->type->throttle(port); | |
366 | } | |
367 | ||
368 | static void serial_unthrottle (struct tty_struct * tty) | |
369 | { | |
81671ddb | 370 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 371 | |
487f9c67 LFC |
372 | if (!port) |
373 | return; | |
374 | ||
1da177e4 LT |
375 | dbg("%s - port %d", __FUNCTION__, port->number); |
376 | ||
377 | if (!port->open_count) { | |
378 | dbg("%s - port not open", __FUNCTION__); | |
379 | return; | |
380 | } | |
381 | ||
382 | /* pass on to the driver specific version of this function */ | |
383 | if (port->serial->type->unthrottle) | |
384 | port->serial->type->unthrottle(port); | |
385 | } | |
386 | ||
387 | static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) | |
388 | { | |
81671ddb | 389 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
390 | int retval = -ENODEV; |
391 | ||
487f9c67 LFC |
392 | if (!port) |
393 | goto exit; | |
394 | ||
1da177e4 LT |
395 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); |
396 | ||
397 | if (!port->open_count) { | |
398 | dbg ("%s - port not open", __FUNCTION__); | |
399 | goto exit; | |
400 | } | |
401 | ||
402 | /* pass on to the driver specific version of this function if it is available */ | |
403 | if (port->serial->type->ioctl) | |
404 | retval = port->serial->type->ioctl(port, file, cmd, arg); | |
405 | else | |
406 | retval = -ENOIOCTLCMD; | |
407 | ||
408 | exit: | |
409 | return retval; | |
410 | } | |
411 | ||
412 | static void serial_set_termios (struct tty_struct *tty, struct termios * old) | |
413 | { | |
81671ddb | 414 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 415 | |
487f9c67 LFC |
416 | if (!port) |
417 | return; | |
418 | ||
1da177e4 LT |
419 | dbg("%s - port %d", __FUNCTION__, port->number); |
420 | ||
421 | if (!port->open_count) { | |
422 | dbg("%s - port not open", __FUNCTION__); | |
423 | return; | |
424 | } | |
425 | ||
426 | /* pass on to the driver specific version of this function if it is available */ | |
427 | if (port->serial->type->set_termios) | |
428 | port->serial->type->set_termios(port, old); | |
429 | } | |
430 | ||
431 | static void serial_break (struct tty_struct *tty, int break_state) | |
432 | { | |
81671ddb | 433 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 434 | |
487f9c67 LFC |
435 | if (!port) |
436 | return; | |
437 | ||
1da177e4 LT |
438 | dbg("%s - port %d", __FUNCTION__, port->number); |
439 | ||
440 | if (!port->open_count) { | |
441 | dbg("%s - port not open", __FUNCTION__); | |
442 | return; | |
443 | } | |
444 | ||
445 | /* pass on to the driver specific version of this function if it is available */ | |
446 | if (port->serial->type->break_ctl) | |
447 | port->serial->type->break_ctl(port, break_state); | |
448 | } | |
449 | ||
450 | static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) | |
451 | { | |
452 | struct usb_serial *serial; | |
453 | int length = 0; | |
454 | int i; | |
455 | off_t begin = 0; | |
456 | char tmp[40]; | |
457 | ||
458 | dbg("%s", __FUNCTION__); | |
17a882fc | 459 | length += sprintf (page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
460 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
461 | serial = usb_serial_get_by_index(i); | |
462 | if (serial == NULL) | |
463 | continue; | |
464 | ||
465 | length += sprintf (page+length, "%d:", i); | |
18fcac35 GKH |
466 | if (serial->type->driver.owner) |
467 | length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner)); | |
269bda1c | 468 | length += sprintf (page+length, " name:\"%s\"", serial->type->description); |
1da177e4 LT |
469 | length += sprintf (page+length, " vendor:%04x product:%04x", |
470 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
471 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
472 | length += sprintf (page+length, " num_ports:%d", serial->num_ports); | |
473 | length += sprintf (page+length, " port:%d", i - serial->minor + 1); | |
474 | ||
475 | usb_make_path(serial->dev, tmp, sizeof(tmp)); | |
476 | length += sprintf (page+length, " path:%s", tmp); | |
477 | ||
478 | length += sprintf (page+length, "\n"); | |
479 | if ((length + begin) > (off + count)) | |
480 | goto done; | |
481 | if ((length + begin) < off) { | |
482 | begin += length; | |
483 | length = 0; | |
484 | } | |
73e487fd | 485 | usb_serial_put(serial); |
1da177e4 LT |
486 | } |
487 | *eof = 1; | |
488 | done: | |
489 | if (off >= (length + begin)) | |
490 | return 0; | |
491 | *start = page + (off-begin); | |
492 | return ((count < begin+length-off) ? count : begin+length-off); | |
493 | } | |
494 | ||
495 | static int serial_tiocmget (struct tty_struct *tty, struct file *file) | |
496 | { | |
81671ddb | 497 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 498 | |
487f9c67 | 499 | if (!port) |
db54a53d | 500 | return -ENODEV; |
487f9c67 | 501 | |
1da177e4 LT |
502 | dbg("%s - port %d", __FUNCTION__, port->number); |
503 | ||
504 | if (!port->open_count) { | |
505 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 506 | return -ENODEV; |
1da177e4 LT |
507 | } |
508 | ||
509 | if (port->serial->type->tiocmget) | |
510 | return port->serial->type->tiocmget(port, file); | |
511 | ||
1da177e4 LT |
512 | return -EINVAL; |
513 | } | |
514 | ||
515 | static int serial_tiocmset (struct tty_struct *tty, struct file *file, | |
516 | unsigned int set, unsigned int clear) | |
517 | { | |
81671ddb | 518 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 519 | |
487f9c67 | 520 | if (!port) |
db54a53d | 521 | return -ENODEV; |
487f9c67 | 522 | |
1da177e4 LT |
523 | dbg("%s - port %d", __FUNCTION__, port->number); |
524 | ||
525 | if (!port->open_count) { | |
526 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 527 | return -ENODEV; |
1da177e4 LT |
528 | } |
529 | ||
530 | if (port->serial->type->tiocmset) | |
531 | return port->serial->type->tiocmset(port, file, set, clear); | |
532 | ||
1da177e4 LT |
533 | return -EINVAL; |
534 | } | |
535 | ||
cf2c7481 PZ |
536 | /* |
537 | * We would be calling tty_wakeup here, but unfortunately some line | |
538 | * disciplines have an annoying habit of calling tty->write from | |
539 | * the write wakeup callback (e.g. n_hdlc.c). | |
540 | */ | |
541 | void usb_serial_port_softint(struct usb_serial_port *port) | |
542 | { | |
543 | schedule_work(&port->work); | |
544 | } | |
545 | ||
546 | static void usb_serial_port_work(void *private) | |
1da177e4 | 547 | { |
81671ddb | 548 | struct usb_serial_port *port = private; |
1da177e4 LT |
549 | struct tty_struct *tty; |
550 | ||
551 | dbg("%s - port %d", __FUNCTION__, port->number); | |
552 | ||
553 | if (!port) | |
554 | return; | |
555 | ||
556 | tty = port->tty; | |
557 | if (!tty) | |
558 | return; | |
559 | ||
560 | tty_wakeup(tty); | |
561 | } | |
562 | ||
563 | static void port_release(struct device *dev) | |
564 | { | |
565 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
566 | ||
567 | dbg ("%s - %s", __FUNCTION__, dev->bus_id); | |
568 | usb_kill_urb(port->read_urb); | |
569 | usb_free_urb(port->read_urb); | |
570 | usb_kill_urb(port->write_urb); | |
571 | usb_free_urb(port->write_urb); | |
572 | usb_kill_urb(port->interrupt_in_urb); | |
573 | usb_free_urb(port->interrupt_in_urb); | |
574 | usb_kill_urb(port->interrupt_out_urb); | |
575 | usb_free_urb(port->interrupt_out_urb); | |
576 | kfree(port->bulk_in_buffer); | |
577 | kfree(port->bulk_out_buffer); | |
578 | kfree(port->interrupt_in_buffer); | |
579 | kfree(port->interrupt_out_buffer); | |
580 | kfree(port); | |
581 | } | |
582 | ||
583 | static struct usb_serial * create_serial (struct usb_device *dev, | |
584 | struct usb_interface *interface, | |
ea65370d | 585 | struct usb_serial_driver *driver) |
1da177e4 LT |
586 | { |
587 | struct usb_serial *serial; | |
588 | ||
80b6ca48 | 589 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 LT |
590 | if (!serial) { |
591 | dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); | |
592 | return NULL; | |
593 | } | |
1da177e4 | 594 | serial->dev = usb_get_dev(dev); |
ea65370d | 595 | serial->type = driver; |
1da177e4 LT |
596 | serial->interface = interface; |
597 | kref_init(&serial->kref); | |
598 | ||
599 | return serial; | |
600 | } | |
601 | ||
ea65370d | 602 | static struct usb_serial_driver *search_serial_device(struct usb_interface *iface) |
1da177e4 LT |
603 | { |
604 | struct list_head *p; | |
605 | const struct usb_device_id *id; | |
ea65370d | 606 | struct usb_serial_driver *t; |
1da177e4 | 607 | |
93b1fae4 | 608 | /* Check if the usb id matches a known device */ |
1da177e4 | 609 | list_for_each(p, &usb_serial_driver_list) { |
ea65370d | 610 | t = list_entry(p, struct usb_serial_driver, driver_list); |
1da177e4 LT |
611 | id = usb_match_id(iface, t->id_table); |
612 | if (id != NULL) { | |
613 | dbg("descriptor matches"); | |
614 | return t; | |
615 | } | |
616 | } | |
617 | ||
618 | return NULL; | |
619 | } | |
620 | ||
621 | int usb_serial_probe(struct usb_interface *interface, | |
622 | const struct usb_device_id *id) | |
623 | { | |
624 | struct usb_device *dev = interface_to_usbdev (interface); | |
625 | struct usb_serial *serial = NULL; | |
626 | struct usb_serial_port *port; | |
627 | struct usb_host_interface *iface_desc; | |
628 | struct usb_endpoint_descriptor *endpoint; | |
629 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
630 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
631 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
632 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 633 | struct usb_serial_driver *type = NULL; |
1da177e4 LT |
634 | int retval; |
635 | int minor; | |
636 | int buffer_size; | |
637 | int i; | |
638 | int num_interrupt_in = 0; | |
639 | int num_interrupt_out = 0; | |
640 | int num_bulk_in = 0; | |
641 | int num_bulk_out = 0; | |
642 | int num_ports = 0; | |
643 | int max_endpoints; | |
644 | ||
645 | type = search_serial_device(interface); | |
646 | if (!type) { | |
647 | dbg("none matched"); | |
648 | return -ENODEV; | |
649 | } | |
650 | ||
651 | serial = create_serial (dev, interface, type); | |
652 | if (!serial) { | |
653 | dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); | |
654 | return -ENOMEM; | |
655 | } | |
656 | ||
657 | /* if this device type has a probe function, call it */ | |
658 | if (type->probe) { | |
659 | const struct usb_device_id *id; | |
660 | ||
18fcac35 | 661 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
662 | dev_err(&interface->dev, "module get failed, exiting\n"); |
663 | kfree (serial); | |
664 | return -EIO; | |
665 | } | |
666 | ||
667 | id = usb_match_id(interface, type->id_table); | |
668 | retval = type->probe(serial, id); | |
18fcac35 | 669 | module_put(type->driver.owner); |
1da177e4 LT |
670 | |
671 | if (retval) { | |
672 | dbg ("sub driver rejected device"); | |
673 | kfree (serial); | |
674 | return retval; | |
675 | } | |
676 | } | |
677 | ||
678 | /* descriptor matches, let's find the endpoints needed */ | |
679 | /* check out the endpoints */ | |
680 | iface_desc = interface->cur_altsetting; | |
681 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
682 | endpoint = &iface_desc->endpoint[i].desc; | |
683 | ||
684 | if ((endpoint->bEndpointAddress & 0x80) && | |
685 | ((endpoint->bmAttributes & 3) == 0x02)) { | |
686 | /* we found a bulk in endpoint */ | |
687 | dbg("found bulk in on endpoint %d", i); | |
688 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
689 | ++num_bulk_in; | |
690 | } | |
691 | ||
692 | if (((endpoint->bEndpointAddress & 0x80) == 0x00) && | |
693 | ((endpoint->bmAttributes & 3) == 0x02)) { | |
694 | /* we found a bulk out endpoint */ | |
695 | dbg("found bulk out on endpoint %d", i); | |
696 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
697 | ++num_bulk_out; | |
698 | } | |
699 | ||
700 | if ((endpoint->bEndpointAddress & 0x80) && | |
701 | ((endpoint->bmAttributes & 3) == 0x03)) { | |
702 | /* we found a interrupt in endpoint */ | |
703 | dbg("found interrupt in on endpoint %d", i); | |
704 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
705 | ++num_interrupt_in; | |
706 | } | |
707 | ||
708 | if (((endpoint->bEndpointAddress & 0x80) == 0x00) && | |
709 | ((endpoint->bmAttributes & 3) == 0x03)) { | |
710 | /* we found an interrupt out endpoint */ | |
711 | dbg("found interrupt out on endpoint %d", i); | |
712 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
713 | ++num_interrupt_out; | |
714 | } | |
715 | } | |
716 | ||
717 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
718 | /* BEGIN HORRIBLE HACK FOR PL2303 */ | |
719 | /* this is needed due to the looney way its endpoints are set up */ | |
720 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
721 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
722 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
723 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID))) { | |
724 | if (interface != dev->actconfig->interface[0]) { | |
725 | /* check out the endpoints of the other interface*/ | |
726 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
727 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
728 | endpoint = &iface_desc->endpoint[i].desc; | |
729 | if ((endpoint->bEndpointAddress & 0x80) && | |
730 | ((endpoint->bmAttributes & 3) == 0x03)) { | |
731 | /* we found a interrupt in endpoint */ | |
732 | dbg("found interrupt in for Prolific device on separate interface"); | |
733 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
734 | ++num_interrupt_in; | |
735 | } | |
736 | } | |
737 | } | |
738 | ||
739 | /* Now make sure the PL-2303 is configured correctly. | |
740 | * If not, give up now and hope this hack will work | |
741 | * properly during a later invocation of usb_serial_probe | |
742 | */ | |
743 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
744 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); | |
745 | kfree (serial); | |
746 | return -ENODEV; | |
747 | } | |
748 | } | |
749 | /* END HORRIBLE HACK FOR PL2303 */ | |
750 | #endif | |
751 | ||
752 | /* found all that we need */ | |
269bda1c | 753 | dev_info(&interface->dev, "%s converter detected\n", type->description); |
1da177e4 LT |
754 | |
755 | #ifdef CONFIG_USB_SERIAL_GENERIC | |
756 | if (type == &usb_serial_generic_device) { | |
757 | num_ports = num_bulk_out; | |
758 | if (num_ports == 0) { | |
759 | dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n"); | |
760 | kfree (serial); | |
761 | return -EIO; | |
762 | } | |
763 | } | |
764 | #endif | |
765 | if (!num_ports) { | |
766 | /* if this device type has a calc_num_ports function, call it */ | |
767 | if (type->calc_num_ports) { | |
18fcac35 | 768 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
769 | dev_err(&interface->dev, "module get failed, exiting\n"); |
770 | kfree (serial); | |
771 | return -EIO; | |
772 | } | |
773 | num_ports = type->calc_num_ports (serial); | |
18fcac35 | 774 | module_put(type->driver.owner); |
1da177e4 LT |
775 | } |
776 | if (!num_ports) | |
777 | num_ports = type->num_ports; | |
778 | } | |
779 | ||
780 | if (get_free_serial (serial, num_ports, &minor) == NULL) { | |
781 | dev_err(&interface->dev, "No more free serial devices\n"); | |
782 | kfree (serial); | |
783 | return -ENOMEM; | |
784 | } | |
785 | ||
786 | serial->minor = minor; | |
787 | serial->num_ports = num_ports; | |
788 | serial->num_bulk_in = num_bulk_in; | |
789 | serial->num_bulk_out = num_bulk_out; | |
790 | serial->num_interrupt_in = num_interrupt_in; | |
791 | serial->num_interrupt_out = num_interrupt_out; | |
792 | ||
793 | /* create our ports, we need as many as the max endpoints */ | |
794 | /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */ | |
795 | max_endpoints = max(num_bulk_in, num_bulk_out); | |
796 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
797 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
798 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
799 | serial->num_port_pointers = max_endpoints; | |
800 | dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints); | |
801 | for (i = 0; i < max_endpoints; ++i) { | |
80b6ca48 | 802 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
803 | if (!port) |
804 | goto probe_error; | |
1da177e4 LT |
805 | port->number = i + serial->minor; |
806 | port->serial = serial; | |
507ca9bc | 807 | spin_lock_init(&port->lock); |
1ce7dd26 | 808 | mutex_init(&port->mutex); |
cf2c7481 | 809 | INIT_WORK(&port->work, usb_serial_port_work, port); |
1da177e4 LT |
810 | serial->port[i] = port; |
811 | } | |
812 | ||
813 | /* set up the endpoint information */ | |
814 | for (i = 0; i < num_bulk_in; ++i) { | |
815 | endpoint = bulk_in_endpoint[i]; | |
816 | port = serial->port[i]; | |
817 | port->read_urb = usb_alloc_urb (0, GFP_KERNEL); | |
818 | if (!port->read_urb) { | |
819 | dev_err(&interface->dev, "No free urbs available\n"); | |
820 | goto probe_error; | |
821 | } | |
822 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
823 | port->bulk_in_size = buffer_size; | |
824 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
825 | port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
826 | if (!port->bulk_in_buffer) { | |
827 | dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n"); | |
828 | goto probe_error; | |
829 | } | |
830 | usb_fill_bulk_urb (port->read_urb, dev, | |
831 | usb_rcvbulkpipe (dev, | |
832 | endpoint->bEndpointAddress), | |
833 | port->bulk_in_buffer, buffer_size, | |
834 | serial->type->read_bulk_callback, | |
835 | port); | |
836 | } | |
837 | ||
838 | for (i = 0; i < num_bulk_out; ++i) { | |
839 | endpoint = bulk_out_endpoint[i]; | |
840 | port = serial->port[i]; | |
841 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
842 | if (!port->write_urb) { | |
843 | dev_err(&interface->dev, "No free urbs available\n"); | |
844 | goto probe_error; | |
845 | } | |
846 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
847 | port->bulk_out_size = buffer_size; | |
848 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
849 | port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
850 | if (!port->bulk_out_buffer) { | |
851 | dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n"); | |
852 | goto probe_error; | |
853 | } | |
854 | usb_fill_bulk_urb (port->write_urb, dev, | |
855 | usb_sndbulkpipe (dev, | |
856 | endpoint->bEndpointAddress), | |
857 | port->bulk_out_buffer, buffer_size, | |
858 | serial->type->write_bulk_callback, | |
859 | port); | |
860 | } | |
861 | ||
862 | if (serial->type->read_int_callback) { | |
863 | for (i = 0; i < num_interrupt_in; ++i) { | |
864 | endpoint = interrupt_in_endpoint[i]; | |
865 | port = serial->port[i]; | |
866 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
867 | if (!port->interrupt_in_urb) { | |
868 | dev_err(&interface->dev, "No free urbs available\n"); | |
869 | goto probe_error; | |
870 | } | |
871 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
872 | port->interrupt_in_endpointAddress = endpoint->bEndpointAddress; | |
873 | port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
874 | if (!port->interrupt_in_buffer) { | |
875 | dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n"); | |
876 | goto probe_error; | |
877 | } | |
878 | usb_fill_int_urb (port->interrupt_in_urb, dev, | |
879 | usb_rcvintpipe (dev, | |
880 | endpoint->bEndpointAddress), | |
881 | port->interrupt_in_buffer, buffer_size, | |
882 | serial->type->read_int_callback, port, | |
883 | endpoint->bInterval); | |
884 | } | |
885 | } else if (num_interrupt_in) { | |
886 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
887 | } | |
888 | ||
889 | if (serial->type->write_int_callback) { | |
890 | for (i = 0; i < num_interrupt_out; ++i) { | |
891 | endpoint = interrupt_out_endpoint[i]; | |
892 | port = serial->port[i]; | |
893 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
894 | if (!port->interrupt_out_urb) { | |
895 | dev_err(&interface->dev, "No free urbs available\n"); | |
896 | goto probe_error; | |
897 | } | |
898 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
899 | port->interrupt_out_size = buffer_size; | |
900 | port->interrupt_out_endpointAddress = endpoint->bEndpointAddress; | |
901 | port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
902 | if (!port->interrupt_out_buffer) { | |
903 | dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n"); | |
904 | goto probe_error; | |
905 | } | |
906 | usb_fill_int_urb (port->interrupt_out_urb, dev, | |
907 | usb_sndintpipe (dev, | |
908 | endpoint->bEndpointAddress), | |
909 | port->interrupt_out_buffer, buffer_size, | |
910 | serial->type->write_int_callback, port, | |
911 | endpoint->bInterval); | |
912 | } | |
913 | } else if (num_interrupt_out) { | |
914 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
915 | } | |
916 | ||
917 | /* if this device type has an attach function, call it */ | |
918 | if (type->attach) { | |
18fcac35 | 919 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
920 | dev_err(&interface->dev, "module get failed, exiting\n"); |
921 | goto probe_error; | |
922 | } | |
923 | retval = type->attach (serial); | |
18fcac35 | 924 | module_put(type->driver.owner); |
1da177e4 LT |
925 | if (retval < 0) |
926 | goto probe_error; | |
927 | if (retval > 0) { | |
928 | /* quietly accept this device, but don't bind to a serial port | |
929 | * as it's about to disappear */ | |
930 | goto exit; | |
931 | } | |
932 | } | |
933 | ||
934 | /* register all of the individual ports with the driver core */ | |
935 | for (i = 0; i < num_ports; ++i) { | |
936 | port = serial->port[i]; | |
937 | port->dev.parent = &interface->dev; | |
938 | port->dev.driver = NULL; | |
939 | port->dev.bus = &usb_serial_bus_type; | |
940 | port->dev.release = &port_release; | |
941 | ||
942 | snprintf (&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number); | |
943 | dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id); | |
944 | device_register (&port->dev); | |
945 | } | |
946 | ||
947 | usb_serial_console_init (debug, minor); | |
948 | ||
949 | exit: | |
950 | /* success */ | |
951 | usb_set_intfdata (interface, serial); | |
952 | return 0; | |
953 | ||
954 | probe_error: | |
955 | for (i = 0; i < num_bulk_in; ++i) { | |
956 | port = serial->port[i]; | |
957 | if (!port) | |
958 | continue; | |
959 | if (port->read_urb) | |
960 | usb_free_urb (port->read_urb); | |
961 | kfree(port->bulk_in_buffer); | |
962 | } | |
963 | for (i = 0; i < num_bulk_out; ++i) { | |
964 | port = serial->port[i]; | |
965 | if (!port) | |
966 | continue; | |
967 | if (port->write_urb) | |
968 | usb_free_urb (port->write_urb); | |
969 | kfree(port->bulk_out_buffer); | |
970 | } | |
971 | for (i = 0; i < num_interrupt_in; ++i) { | |
972 | port = serial->port[i]; | |
973 | if (!port) | |
974 | continue; | |
975 | if (port->interrupt_in_urb) | |
976 | usb_free_urb (port->interrupt_in_urb); | |
977 | kfree(port->interrupt_in_buffer); | |
978 | } | |
979 | for (i = 0; i < num_interrupt_out; ++i) { | |
980 | port = serial->port[i]; | |
981 | if (!port) | |
982 | continue; | |
983 | if (port->interrupt_out_urb) | |
984 | usb_free_urb (port->interrupt_out_urb); | |
985 | kfree(port->interrupt_out_buffer); | |
986 | } | |
987 | ||
988 | /* return the minor range that this device had */ | |
989 | return_serial (serial); | |
990 | ||
991 | /* free up any memory that we allocated */ | |
992 | for (i = 0; i < serial->num_port_pointers; ++i) | |
993 | kfree(serial->port[i]); | |
994 | kfree (serial); | |
995 | return -EIO; | |
996 | } | |
997 | ||
998 | void usb_serial_disconnect(struct usb_interface *interface) | |
999 | { | |
1000 | int i; | |
1001 | struct usb_serial *serial = usb_get_intfdata (interface); | |
1002 | struct device *dev = &interface->dev; | |
1003 | struct usb_serial_port *port; | |
1004 | ||
73e487fd | 1005 | usb_serial_console_disconnect(serial); |
1da177e4 LT |
1006 | dbg ("%s", __FUNCTION__); |
1007 | ||
1008 | usb_set_intfdata (interface, NULL); | |
1009 | if (serial) { | |
1010 | for (i = 0; i < serial->num_ports; ++i) { | |
1011 | port = serial->port[i]; | |
1012 | if (port && port->tty) | |
1013 | tty_hangup(port->tty); | |
1014 | } | |
1015 | /* let the last holder of this object | |
1016 | * cause it to be cleaned up */ | |
73e487fd | 1017 | usb_serial_put(serial); |
1da177e4 LT |
1018 | } |
1019 | dev_info(dev, "device disconnected\n"); | |
1020 | } | |
1021 | ||
1022 | static struct tty_operations serial_ops = { | |
1023 | .open = serial_open, | |
1024 | .close = serial_close, | |
1025 | .write = serial_write, | |
1026 | .write_room = serial_write_room, | |
1027 | .ioctl = serial_ioctl, | |
1028 | .set_termios = serial_set_termios, | |
1029 | .throttle = serial_throttle, | |
1030 | .unthrottle = serial_unthrottle, | |
1031 | .break_ctl = serial_break, | |
1032 | .chars_in_buffer = serial_chars_in_buffer, | |
1033 | .read_proc = serial_read_proc, | |
1034 | .tiocmget = serial_tiocmget, | |
1035 | .tiocmset = serial_tiocmset, | |
1036 | }; | |
1037 | ||
1038 | struct tty_driver *usb_serial_tty_driver; | |
1039 | ||
1040 | static int __init usb_serial_init(void) | |
1041 | { | |
1042 | int i; | |
1043 | int result; | |
1044 | ||
1045 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1046 | if (!usb_serial_tty_driver) | |
1047 | return -ENOMEM; | |
1048 | ||
1049 | /* Initialize our global data */ | |
1050 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1051 | serial_table[i] = NULL; | |
1052 | } | |
1053 | ||
1054 | result = bus_register(&usb_serial_bus_type); | |
1055 | if (result) { | |
1056 | err("%s - registering bus driver failed", __FUNCTION__); | |
1057 | goto exit_bus; | |
1058 | } | |
1059 | ||
1da177e4 LT |
1060 | usb_serial_tty_driver->owner = THIS_MODULE; |
1061 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1062 | usb_serial_tty_driver->name = "ttyUSB"; |
1063 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1064 | usb_serial_tty_driver->minor_start = 0; | |
1065 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1066 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
331b8319 | 1067 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1068 | usb_serial_tty_driver->init_termios = tty_std_termios; |
1069 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1070 | tty_set_operations(usb_serial_tty_driver, &serial_ops); | |
1071 | result = tty_register_driver(usb_serial_tty_driver); | |
1072 | if (result) { | |
1073 | err("%s - tty_register_driver failed", __FUNCTION__); | |
1074 | goto exit_reg_driver; | |
1075 | } | |
1076 | ||
1077 | /* register the USB driver */ | |
1078 | result = usb_register(&usb_serial_driver); | |
1079 | if (result < 0) { | |
1080 | err("%s - usb_register failed", __FUNCTION__); | |
1081 | goto exit_tty; | |
1082 | } | |
1083 | ||
06299db3 GKH |
1084 | /* register the generic driver, if we should */ |
1085 | result = usb_serial_generic_register(debug); | |
1086 | if (result < 0) { | |
1087 | err("%s - registering generic driver failed", __FUNCTION__); | |
1088 | goto exit_generic; | |
1089 | } | |
1090 | ||
17a882fc | 1091 | info(DRIVER_DESC); |
1da177e4 LT |
1092 | |
1093 | return result; | |
1094 | ||
06299db3 GKH |
1095 | exit_generic: |
1096 | usb_deregister(&usb_serial_driver); | |
1097 | ||
1da177e4 LT |
1098 | exit_tty: |
1099 | tty_unregister_driver(usb_serial_tty_driver); | |
1100 | ||
1101 | exit_reg_driver: | |
1da177e4 LT |
1102 | bus_unregister(&usb_serial_bus_type); |
1103 | ||
1104 | exit_bus: | |
1105 | err ("%s - returning with error %d", __FUNCTION__, result); | |
1106 | put_tty_driver(usb_serial_tty_driver); | |
1107 | return result; | |
1108 | } | |
1109 | ||
1110 | ||
1111 | static void __exit usb_serial_exit(void) | |
1112 | { | |
1113 | usb_serial_console_exit(); | |
1114 | ||
1115 | usb_serial_generic_deregister(); | |
1116 | ||
1117 | usb_deregister(&usb_serial_driver); | |
1118 | tty_unregister_driver(usb_serial_tty_driver); | |
1119 | put_tty_driver(usb_serial_tty_driver); | |
1120 | bus_unregister(&usb_serial_bus_type); | |
1121 | } | |
1122 | ||
1123 | ||
1124 | module_init(usb_serial_init); | |
1125 | module_exit(usb_serial_exit); | |
1126 | ||
1127 | #define set_to_generic_if_null(type, function) \ | |
1128 | do { \ | |
1129 | if (!type->function) { \ | |
1130 | type->function = usb_serial_generic_##function; \ | |
1131 | dbg("Had to override the " #function \ | |
1132 | " usb serial operation with the generic one.");\ | |
1133 | } \ | |
1134 | } while (0) | |
1135 | ||
ea65370d | 1136 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1137 | { |
1138 | set_to_generic_if_null(device, open); | |
1139 | set_to_generic_if_null(device, write); | |
1140 | set_to_generic_if_null(device, close); | |
1141 | set_to_generic_if_null(device, write_room); | |
1142 | set_to_generic_if_null(device, chars_in_buffer); | |
1143 | set_to_generic_if_null(device, read_bulk_callback); | |
1144 | set_to_generic_if_null(device, write_bulk_callback); | |
1145 | set_to_generic_if_null(device, shutdown); | |
1146 | } | |
1147 | ||
ea65370d | 1148 | int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 LT |
1149 | { |
1150 | int retval; | |
1151 | ||
ea65370d | 1152 | fixup_generic(driver); |
1da177e4 | 1153 | |
269bda1c GKH |
1154 | if (!driver->description) |
1155 | driver->description = driver->driver.name; | |
1156 | ||
1da177e4 | 1157 | /* Add this device to our list of devices */ |
ea65370d | 1158 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1159 | |
ea65370d | 1160 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1161 | if (retval) { |
269bda1c | 1162 | err("problem %d when registering driver %s", retval, driver->description); |
ea65370d | 1163 | list_del(&driver->driver_list); |
1da177e4 LT |
1164 | } |
1165 | else | |
269bda1c | 1166 | info("USB Serial support registered for %s", driver->description); |
1da177e4 LT |
1167 | |
1168 | return retval; | |
1169 | } | |
1170 | ||
1171 | ||
ea65370d | 1172 | void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1173 | { |
269bda1c | 1174 | info("USB Serial deregistering driver %s", device->description); |
1da177e4 LT |
1175 | list_del(&device->driver_list); |
1176 | usb_serial_bus_deregister(device); | |
1177 | } | |
1178 | ||
1179 | ||
1180 | ||
1181 | /* If the usb-serial core is built into the core, the usb-serial drivers | |
1182 | need these symbols to load properly as modules. */ | |
1183 | EXPORT_SYMBOL_GPL(usb_serial_register); | |
1184 | EXPORT_SYMBOL_GPL(usb_serial_deregister); | |
1185 | EXPORT_SYMBOL_GPL(usb_serial_probe); | |
1186 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); | |
1187 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); | |
1188 | ||
1189 | ||
1190 | /* Module information */ | |
1191 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1192 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1da177e4 LT |
1193 | MODULE_LICENSE("GPL"); |
1194 | ||
1195 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1196 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |