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 | ||
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> | |
a969888c | 34 | #include <linux/usb/serial.h> |
1da177e4 LT |
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 | ||
34f8e761 PZ |
43 | static void port_free(struct usb_serial_port *port); |
44 | ||
1da177e4 LT |
45 | /* Driver structure we register with the USB core */ |
46 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
47 | .name = "usbserial", |
48 | .probe = usb_serial_probe, | |
49 | .disconnect = usb_serial_disconnect, | |
ba9dc657 | 50 | .no_dynamic_id = 1, |
1da177e4 LT |
51 | }; |
52 | ||
53 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
54 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
55 | cause the "hotplug" program to pull in whatever module is necessary | |
56 | via modprobe, and modprobe will load usbserial because the serial | |
57 | drivers depend on it. | |
58 | */ | |
59 | ||
60 | static int debug; | |
61 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; /* initially all NULL */ | |
62 | static LIST_HEAD(usb_serial_driver_list); | |
63 | ||
64 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
65 | { | |
66 | struct usb_serial *serial = serial_table[index]; | |
67 | ||
68 | if (serial) | |
69 | kref_get(&serial->kref); | |
70 | return serial; | |
71 | } | |
72 | ||
73 | static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor) | |
74 | { | |
75 | unsigned int i, j; | |
76 | int good_spot; | |
77 | ||
78 | dbg("%s %d", __FUNCTION__, num_ports); | |
79 | ||
80 | *minor = 0; | |
81 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
82 | if (serial_table[i]) | |
83 | continue; | |
84 | ||
85 | good_spot = 1; | |
86 | for (j = 1; j <= num_ports-1; ++j) | |
87 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
88 | good_spot = 0; | |
89 | i += j; | |
90 | break; | |
91 | } | |
92 | if (good_spot == 0) | |
93 | continue; | |
94 | ||
95 | *minor = i; | |
96 | dbg("%s - minor base = %d", __FUNCTION__, *minor); | |
97 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) | |
98 | serial_table[i] = serial; | |
99 | return serial; | |
100 | } | |
101 | return NULL; | |
102 | } | |
103 | ||
104 | static void return_serial(struct usb_serial *serial) | |
105 | { | |
106 | int i; | |
107 | ||
108 | dbg("%s", __FUNCTION__); | |
109 | ||
110 | if (serial == NULL) | |
111 | return; | |
112 | ||
113 | for (i = 0; i < serial->num_ports; ++i) { | |
114 | serial_table[serial->minor + i] = NULL; | |
115 | } | |
116 | } | |
117 | ||
118 | static void destroy_serial(struct kref *kref) | |
119 | { | |
120 | struct usb_serial *serial; | |
121 | struct usb_serial_port *port; | |
122 | int i; | |
123 | ||
124 | serial = to_usb_serial(kref); | |
125 | ||
269bda1c | 126 | dbg("%s - %s", __FUNCTION__, serial->type->description); |
1da177e4 LT |
127 | |
128 | serial->type->shutdown(serial); | |
129 | ||
130 | /* return the minor range that this device had */ | |
131 | return_serial(serial); | |
132 | ||
133 | for (i = 0; i < serial->num_ports; ++i) | |
134 | serial->port[i]->open_count = 0; | |
135 | ||
136 | /* the ports are cleaned up and released in port_release() */ | |
137 | for (i = 0; i < serial->num_ports; ++i) | |
138 | if (serial->port[i]->dev.parent != NULL) { | |
139 | device_unregister(&serial->port[i]->dev); | |
140 | serial->port[i] = NULL; | |
141 | } | |
142 | ||
143 | /* If this is a "fake" port, we have to clean it up here, as it will | |
144 | * not get cleaned up in port_release() as it was never registered with | |
145 | * the driver core */ | |
146 | if (serial->num_ports < serial->num_port_pointers) { | |
147 | for (i = serial->num_ports; i < serial->num_port_pointers; ++i) { | |
148 | port = serial->port[i]; | |
149 | if (!port) | |
150 | continue; | |
34f8e761 | 151 | port_free(port); |
1da177e4 LT |
152 | } |
153 | } | |
154 | ||
155 | usb_put_dev(serial->dev); | |
156 | ||
157 | /* free up any memory that we allocated */ | |
158 | kfree (serial); | |
159 | } | |
160 | ||
73e487fd GL |
161 | void usb_serial_put(struct usb_serial *serial) |
162 | { | |
163 | kref_put(&serial->kref, destroy_serial); | |
164 | } | |
165 | ||
1da177e4 LT |
166 | /***************************************************************************** |
167 | * Driver tty interface functions | |
168 | *****************************************************************************/ | |
169 | static int serial_open (struct tty_struct *tty, struct file * filp) | |
170 | { | |
171 | struct usb_serial *serial; | |
172 | struct usb_serial_port *port; | |
173 | unsigned int portNumber; | |
174 | int retval; | |
175 | ||
176 | dbg("%s", __FUNCTION__); | |
177 | ||
178 | /* get the serial object associated with this tty pointer */ | |
179 | serial = usb_serial_get_by_index(tty->index); | |
180 | if (!serial) { | |
181 | tty->driver_data = NULL; | |
182 | return -ENODEV; | |
183 | } | |
184 | ||
185 | portNumber = tty->index - serial->minor; | |
186 | port = serial->port[portNumber]; | |
71a84163 LFC |
187 | if (!port) { |
188 | retval = -ENODEV; | |
189 | goto bailout_kref_put; | |
190 | } | |
8a4613f0 | 191 | |
71a84163 LFC |
192 | if (mutex_lock_interruptible(&port->mutex)) { |
193 | retval = -ERESTARTSYS; | |
194 | goto bailout_kref_put; | |
195 | } | |
1da177e4 LT |
196 | |
197 | ++port->open_count; | |
198 | ||
ca85485c PF |
199 | /* set up our port structure making the tty driver |
200 | * remember our port object, and us it */ | |
201 | tty->driver_data = port; | |
202 | port->tty = tty; | |
1da177e4 | 203 | |
ca85485c | 204 | if (port->open_count == 1) { |
1da177e4 LT |
205 | |
206 | /* lock this module before we call it | |
207 | * this may fail, which means we must bail out, | |
208 | * safe because we are called with BKL held */ | |
18fcac35 | 209 | if (!try_module_get(serial->type->driver.owner)) { |
1da177e4 | 210 | retval = -ENODEV; |
71a84163 | 211 | goto bailout_mutex_unlock; |
1da177e4 LT |
212 | } |
213 | ||
214 | /* only call the device specific open if this | |
215 | * is the first time the port is opened */ | |
216 | retval = serial->type->open(port, filp); | |
217 | if (retval) | |
218 | goto bailout_module_put; | |
219 | } | |
220 | ||
1ce7dd26 | 221 | mutex_unlock(&port->mutex); |
1da177e4 LT |
222 | return 0; |
223 | ||
224 | bailout_module_put: | |
18fcac35 | 225 | module_put(serial->type->driver.owner); |
71a84163 | 226 | bailout_mutex_unlock: |
1da177e4 | 227 | port->open_count = 0; |
b059c81a FG |
228 | tty->driver_data = NULL; |
229 | port->tty = NULL; | |
1ce7dd26 | 230 | mutex_unlock(&port->mutex); |
71a84163 | 231 | bailout_kref_put: |
73e487fd | 232 | usb_serial_put(serial); |
1da177e4 LT |
233 | return retval; |
234 | } | |
235 | ||
236 | static void serial_close(struct tty_struct *tty, struct file * filp) | |
237 | { | |
81671ddb | 238 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
239 | |
240 | if (!port) | |
241 | return; | |
242 | ||
243 | dbg("%s - port %d", __FUNCTION__, port->number); | |
244 | ||
1ce7dd26 | 245 | mutex_lock(&port->mutex); |
8a4613f0 | 246 | |
91c0bce2 | 247 | if (port->open_count == 0) { |
1ce7dd26 | 248 | mutex_unlock(&port->mutex); |
91c0bce2 GKH |
249 | return; |
250 | } | |
1da177e4 LT |
251 | |
252 | --port->open_count; | |
253 | if (port->open_count == 0) { | |
254 | /* only call the device specific close if this | |
255 | * port is being closed by the last owner */ | |
256 | port->serial->type->close(port, filp); | |
257 | ||
258 | if (port->tty) { | |
259 | if (port->tty->driver_data) | |
260 | port->tty->driver_data = NULL; | |
261 | port->tty = NULL; | |
262 | } | |
263 | ||
18fcac35 | 264 | module_put(port->serial->type->driver.owner); |
1da177e4 LT |
265 | } |
266 | ||
1ce7dd26 | 267 | mutex_unlock(&port->mutex); |
73e487fd | 268 | usb_serial_put(port->serial); |
1da177e4 LT |
269 | } |
270 | ||
271 | static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) | |
272 | { | |
81671ddb | 273 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
274 | int retval = -EINVAL; |
275 | ||
73e487fd | 276 | if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
277 | goto exit; |
278 | ||
1da177e4 LT |
279 | dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count); |
280 | ||
281 | if (!port->open_count) { | |
282 | dbg("%s - port not opened", __FUNCTION__); | |
283 | goto exit; | |
284 | } | |
285 | ||
286 | /* pass on to the driver specific version of this function */ | |
287 | retval = port->serial->type->write(port, buf, count); | |
288 | ||
289 | exit: | |
290 | return retval; | |
291 | } | |
292 | ||
293 | static int serial_write_room (struct tty_struct *tty) | |
294 | { | |
81671ddb | 295 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 296 | int retval = -ENODEV; |
1da177e4 | 297 | |
487f9c67 LFC |
298 | if (!port) |
299 | goto exit; | |
300 | ||
1da177e4 LT |
301 | dbg("%s - port %d", __FUNCTION__, port->number); |
302 | ||
303 | if (!port->open_count) { | |
304 | dbg("%s - port not open", __FUNCTION__); | |
305 | goto exit; | |
306 | } | |
307 | ||
308 | /* pass on to the driver specific version of this function */ | |
309 | retval = port->serial->type->write_room(port); | |
310 | ||
311 | exit: | |
312 | return retval; | |
313 | } | |
314 | ||
315 | static int serial_chars_in_buffer (struct tty_struct *tty) | |
316 | { | |
81671ddb | 317 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 318 | int retval = -ENODEV; |
1da177e4 | 319 | |
487f9c67 LFC |
320 | if (!port) |
321 | goto exit; | |
322 | ||
1da177e4 LT |
323 | dbg("%s = port %d", __FUNCTION__, port->number); |
324 | ||
325 | if (!port->open_count) { | |
326 | dbg("%s - port not open", __FUNCTION__); | |
327 | goto exit; | |
328 | } | |
329 | ||
330 | /* pass on to the driver specific version of this function */ | |
331 | retval = port->serial->type->chars_in_buffer(port); | |
332 | ||
333 | exit: | |
334 | return retval; | |
335 | } | |
336 | ||
337 | static void serial_throttle (struct tty_struct * tty) | |
338 | { | |
81671ddb | 339 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 340 | |
487f9c67 LFC |
341 | if (!port) |
342 | return; | |
343 | ||
1da177e4 LT |
344 | dbg("%s - port %d", __FUNCTION__, port->number); |
345 | ||
346 | if (!port->open_count) { | |
347 | dbg ("%s - port not open", __FUNCTION__); | |
348 | return; | |
349 | } | |
350 | ||
351 | /* pass on to the driver specific version of this function */ | |
352 | if (port->serial->type->throttle) | |
353 | port->serial->type->throttle(port); | |
354 | } | |
355 | ||
356 | static void serial_unthrottle (struct tty_struct * tty) | |
357 | { | |
81671ddb | 358 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 359 | |
487f9c67 LFC |
360 | if (!port) |
361 | return; | |
362 | ||
1da177e4 LT |
363 | dbg("%s - port %d", __FUNCTION__, port->number); |
364 | ||
365 | if (!port->open_count) { | |
366 | dbg("%s - port not open", __FUNCTION__); | |
367 | return; | |
368 | } | |
369 | ||
370 | /* pass on to the driver specific version of this function */ | |
371 | if (port->serial->type->unthrottle) | |
372 | port->serial->type->unthrottle(port); | |
373 | } | |
374 | ||
375 | static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) | |
376 | { | |
81671ddb | 377 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
378 | int retval = -ENODEV; |
379 | ||
487f9c67 LFC |
380 | if (!port) |
381 | goto exit; | |
382 | ||
1da177e4 LT |
383 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); |
384 | ||
385 | if (!port->open_count) { | |
386 | dbg ("%s - port not open", __FUNCTION__); | |
387 | goto exit; | |
388 | } | |
389 | ||
390 | /* pass on to the driver specific version of this function if it is available */ | |
391 | if (port->serial->type->ioctl) | |
392 | retval = port->serial->type->ioctl(port, file, cmd, arg); | |
393 | else | |
394 | retval = -ENOIOCTLCMD; | |
395 | ||
396 | exit: | |
397 | return retval; | |
398 | } | |
399 | ||
400 | static void serial_set_termios (struct tty_struct *tty, struct termios * old) | |
401 | { | |
81671ddb | 402 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 403 | |
487f9c67 LFC |
404 | if (!port) |
405 | return; | |
406 | ||
1da177e4 LT |
407 | dbg("%s - port %d", __FUNCTION__, port->number); |
408 | ||
409 | if (!port->open_count) { | |
410 | dbg("%s - port not open", __FUNCTION__); | |
411 | return; | |
412 | } | |
413 | ||
414 | /* pass on to the driver specific version of this function if it is available */ | |
415 | if (port->serial->type->set_termios) | |
416 | port->serial->type->set_termios(port, old); | |
417 | } | |
418 | ||
419 | static void serial_break (struct tty_struct *tty, int break_state) | |
420 | { | |
81671ddb | 421 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 422 | |
487f9c67 LFC |
423 | if (!port) |
424 | return; | |
425 | ||
1da177e4 LT |
426 | dbg("%s - port %d", __FUNCTION__, port->number); |
427 | ||
428 | if (!port->open_count) { | |
429 | dbg("%s - port not open", __FUNCTION__); | |
430 | return; | |
431 | } | |
432 | ||
433 | /* pass on to the driver specific version of this function if it is available */ | |
434 | if (port->serial->type->break_ctl) | |
435 | port->serial->type->break_ctl(port, break_state); | |
436 | } | |
437 | ||
438 | static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) | |
439 | { | |
440 | struct usb_serial *serial; | |
441 | int length = 0; | |
442 | int i; | |
443 | off_t begin = 0; | |
444 | char tmp[40]; | |
445 | ||
446 | dbg("%s", __FUNCTION__); | |
17a882fc | 447 | length += sprintf (page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
448 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
449 | serial = usb_serial_get_by_index(i); | |
450 | if (serial == NULL) | |
451 | continue; | |
452 | ||
453 | length += sprintf (page+length, "%d:", i); | |
18fcac35 GKH |
454 | if (serial->type->driver.owner) |
455 | length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner)); | |
269bda1c | 456 | length += sprintf (page+length, " name:\"%s\"", serial->type->description); |
1da177e4 LT |
457 | length += sprintf (page+length, " vendor:%04x product:%04x", |
458 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
459 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
460 | length += sprintf (page+length, " num_ports:%d", serial->num_ports); | |
461 | length += sprintf (page+length, " port:%d", i - serial->minor + 1); | |
462 | ||
463 | usb_make_path(serial->dev, tmp, sizeof(tmp)); | |
464 | length += sprintf (page+length, " path:%s", tmp); | |
465 | ||
466 | length += sprintf (page+length, "\n"); | |
59925838 MU |
467 | if ((length + begin) > (off + count)) { |
468 | usb_serial_put(serial); | |
1da177e4 | 469 | goto done; |
59925838 | 470 | } |
1da177e4 LT |
471 | if ((length + begin) < off) { |
472 | begin += length; | |
473 | length = 0; | |
474 | } | |
73e487fd | 475 | usb_serial_put(serial); |
1da177e4 LT |
476 | } |
477 | *eof = 1; | |
478 | done: | |
479 | if (off >= (length + begin)) | |
480 | return 0; | |
481 | *start = page + (off-begin); | |
482 | return ((count < begin+length-off) ? count : begin+length-off); | |
483 | } | |
484 | ||
485 | static int serial_tiocmget (struct tty_struct *tty, struct file *file) | |
486 | { | |
81671ddb | 487 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 488 | |
487f9c67 | 489 | if (!port) |
db54a53d | 490 | return -ENODEV; |
487f9c67 | 491 | |
1da177e4 LT |
492 | dbg("%s - port %d", __FUNCTION__, port->number); |
493 | ||
494 | if (!port->open_count) { | |
495 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 496 | return -ENODEV; |
1da177e4 LT |
497 | } |
498 | ||
499 | if (port->serial->type->tiocmget) | |
500 | return port->serial->type->tiocmget(port, file); | |
501 | ||
1da177e4 LT |
502 | return -EINVAL; |
503 | } | |
504 | ||
505 | static int serial_tiocmset (struct tty_struct *tty, struct file *file, | |
506 | unsigned int set, unsigned int clear) | |
507 | { | |
81671ddb | 508 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 509 | |
487f9c67 | 510 | if (!port) |
db54a53d | 511 | return -ENODEV; |
487f9c67 | 512 | |
1da177e4 LT |
513 | dbg("%s - port %d", __FUNCTION__, port->number); |
514 | ||
515 | if (!port->open_count) { | |
516 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 517 | return -ENODEV; |
1da177e4 LT |
518 | } |
519 | ||
520 | if (port->serial->type->tiocmset) | |
521 | return port->serial->type->tiocmset(port, file, set, clear); | |
522 | ||
1da177e4 LT |
523 | return -EINVAL; |
524 | } | |
525 | ||
cf2c7481 PZ |
526 | /* |
527 | * We would be calling tty_wakeup here, but unfortunately some line | |
528 | * disciplines have an annoying habit of calling tty->write from | |
529 | * the write wakeup callback (e.g. n_hdlc.c). | |
530 | */ | |
531 | void usb_serial_port_softint(struct usb_serial_port *port) | |
532 | { | |
533 | schedule_work(&port->work); | |
534 | } | |
535 | ||
c4028958 | 536 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 537 | { |
c4028958 DH |
538 | struct usb_serial_port *port = |
539 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
540 | struct tty_struct *tty; |
541 | ||
542 | dbg("%s - port %d", __FUNCTION__, port->number); | |
543 | ||
544 | if (!port) | |
545 | return; | |
546 | ||
547 | tty = port->tty; | |
548 | if (!tty) | |
549 | return; | |
550 | ||
551 | tty_wakeup(tty); | |
552 | } | |
553 | ||
554 | static void port_release(struct device *dev) | |
555 | { | |
556 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
557 | ||
558 | dbg ("%s - %s", __FUNCTION__, dev->bus_id); | |
34f8e761 PZ |
559 | port_free(port); |
560 | } | |
561 | ||
562 | static void port_free(struct usb_serial_port *port) | |
563 | { | |
1da177e4 LT |
564 | usb_kill_urb(port->read_urb); |
565 | usb_free_urb(port->read_urb); | |
566 | usb_kill_urb(port->write_urb); | |
567 | usb_free_urb(port->write_urb); | |
568 | usb_kill_urb(port->interrupt_in_urb); | |
569 | usb_free_urb(port->interrupt_in_urb); | |
570 | usb_kill_urb(port->interrupt_out_urb); | |
571 | usb_free_urb(port->interrupt_out_urb); | |
572 | kfree(port->bulk_in_buffer); | |
573 | kfree(port->bulk_out_buffer); | |
574 | kfree(port->interrupt_in_buffer); | |
575 | kfree(port->interrupt_out_buffer); | |
34f8e761 | 576 | flush_scheduled_work(); /* port->work */ |
1da177e4 LT |
577 | kfree(port); |
578 | } | |
579 | ||
580 | static struct usb_serial * create_serial (struct usb_device *dev, | |
581 | struct usb_interface *interface, | |
ea65370d | 582 | struct usb_serial_driver *driver) |
1da177e4 LT |
583 | { |
584 | struct usb_serial *serial; | |
585 | ||
80b6ca48 | 586 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 LT |
587 | if (!serial) { |
588 | dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); | |
589 | return NULL; | |
590 | } | |
1da177e4 | 591 | serial->dev = usb_get_dev(dev); |
ea65370d | 592 | serial->type = driver; |
1da177e4 LT |
593 | serial->interface = interface; |
594 | kref_init(&serial->kref); | |
595 | ||
596 | return serial; | |
597 | } | |
598 | ||
ea65370d | 599 | static struct usb_serial_driver *search_serial_device(struct usb_interface *iface) |
1da177e4 LT |
600 | { |
601 | struct list_head *p; | |
602 | const struct usb_device_id *id; | |
ea65370d | 603 | struct usb_serial_driver *t; |
1da177e4 | 604 | |
93b1fae4 | 605 | /* Check if the usb id matches a known device */ |
1da177e4 | 606 | list_for_each(p, &usb_serial_driver_list) { |
ea65370d | 607 | t = list_entry(p, struct usb_serial_driver, driver_list); |
1da177e4 LT |
608 | id = usb_match_id(iface, t->id_table); |
609 | if (id != NULL) { | |
610 | dbg("descriptor matches"); | |
611 | return t; | |
612 | } | |
613 | } | |
614 | ||
615 | return NULL; | |
616 | } | |
617 | ||
618 | int usb_serial_probe(struct usb_interface *interface, | |
619 | const struct usb_device_id *id) | |
620 | { | |
621 | struct usb_device *dev = interface_to_usbdev (interface); | |
622 | struct usb_serial *serial = NULL; | |
623 | struct usb_serial_port *port; | |
624 | struct usb_host_interface *iface_desc; | |
625 | struct usb_endpoint_descriptor *endpoint; | |
626 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
627 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
628 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
629 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 630 | struct usb_serial_driver *type = NULL; |
1da177e4 LT |
631 | int retval; |
632 | int minor; | |
633 | int buffer_size; | |
634 | int i; | |
635 | int num_interrupt_in = 0; | |
636 | int num_interrupt_out = 0; | |
637 | int num_bulk_in = 0; | |
638 | int num_bulk_out = 0; | |
639 | int num_ports = 0; | |
640 | int max_endpoints; | |
641 | ||
642 | type = search_serial_device(interface); | |
643 | if (!type) { | |
644 | dbg("none matched"); | |
645 | return -ENODEV; | |
646 | } | |
647 | ||
648 | serial = create_serial (dev, interface, type); | |
649 | if (!serial) { | |
650 | dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); | |
651 | return -ENOMEM; | |
652 | } | |
653 | ||
654 | /* if this device type has a probe function, call it */ | |
655 | if (type->probe) { | |
656 | const struct usb_device_id *id; | |
657 | ||
18fcac35 | 658 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
659 | dev_err(&interface->dev, "module get failed, exiting\n"); |
660 | kfree (serial); | |
661 | return -EIO; | |
662 | } | |
663 | ||
664 | id = usb_match_id(interface, type->id_table); | |
665 | retval = type->probe(serial, id); | |
18fcac35 | 666 | module_put(type->driver.owner); |
1da177e4 LT |
667 | |
668 | if (retval) { | |
669 | dbg ("sub driver rejected device"); | |
670 | kfree (serial); | |
671 | return retval; | |
672 | } | |
673 | } | |
674 | ||
675 | /* descriptor matches, let's find the endpoints needed */ | |
676 | /* check out the endpoints */ | |
677 | iface_desc = interface->cur_altsetting; | |
678 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
679 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
680 | |
681 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
682 | /* we found a bulk in endpoint */ |
683 | dbg("found bulk in on endpoint %d", i); | |
684 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
685 | ++num_bulk_in; | |
686 | } | |
687 | ||
4fa1bbf5 | 688 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
689 | /* we found a bulk out endpoint */ |
690 | dbg("found bulk out on endpoint %d", i); | |
691 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
692 | ++num_bulk_out; | |
693 | } | |
4fa1bbf5 LFC |
694 | |
695 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
696 | /* we found a interrupt in endpoint */ |
697 | dbg("found interrupt in on endpoint %d", i); | |
698 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
699 | ++num_interrupt_in; | |
700 | } | |
701 | ||
4fa1bbf5 | 702 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
703 | /* we found an interrupt out endpoint */ |
704 | dbg("found interrupt out on endpoint %d", i); | |
705 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
706 | ++num_interrupt_out; | |
707 | } | |
708 | } | |
709 | ||
710 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
711 | /* BEGIN HORRIBLE HACK FOR PL2303 */ | |
712 | /* this is needed due to the looney way its endpoints are set up */ | |
713 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
714 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
715 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
716 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
717 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
718 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID))) { | |
1da177e4 LT |
719 | if (interface != dev->actconfig->interface[0]) { |
720 | /* check out the endpoints of the other interface*/ | |
721 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
722 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
723 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 724 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
725 | /* we found a interrupt in endpoint */ |
726 | dbg("found interrupt in for Prolific device on separate interface"); | |
727 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
728 | ++num_interrupt_in; | |
729 | } | |
730 | } | |
731 | } | |
732 | ||
733 | /* Now make sure the PL-2303 is configured correctly. | |
734 | * If not, give up now and hope this hack will work | |
735 | * properly during a later invocation of usb_serial_probe | |
736 | */ | |
737 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
738 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); | |
739 | kfree (serial); | |
740 | return -ENODEV; | |
741 | } | |
742 | } | |
743 | /* END HORRIBLE HACK FOR PL2303 */ | |
744 | #endif | |
745 | ||
746 | /* found all that we need */ | |
269bda1c | 747 | dev_info(&interface->dev, "%s converter detected\n", type->description); |
1da177e4 LT |
748 | |
749 | #ifdef CONFIG_USB_SERIAL_GENERIC | |
750 | if (type == &usb_serial_generic_device) { | |
751 | num_ports = num_bulk_out; | |
752 | if (num_ports == 0) { | |
753 | dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n"); | |
754 | kfree (serial); | |
755 | return -EIO; | |
756 | } | |
757 | } | |
758 | #endif | |
759 | if (!num_ports) { | |
760 | /* if this device type has a calc_num_ports function, call it */ | |
761 | if (type->calc_num_ports) { | |
18fcac35 | 762 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
763 | dev_err(&interface->dev, "module get failed, exiting\n"); |
764 | kfree (serial); | |
765 | return -EIO; | |
766 | } | |
767 | num_ports = type->calc_num_ports (serial); | |
18fcac35 | 768 | module_put(type->driver.owner); |
1da177e4 LT |
769 | } |
770 | if (!num_ports) | |
771 | num_ports = type->num_ports; | |
772 | } | |
773 | ||
774 | if (get_free_serial (serial, num_ports, &minor) == NULL) { | |
775 | dev_err(&interface->dev, "No more free serial devices\n"); | |
776 | kfree (serial); | |
777 | return -ENOMEM; | |
778 | } | |
779 | ||
780 | serial->minor = minor; | |
781 | serial->num_ports = num_ports; | |
782 | serial->num_bulk_in = num_bulk_in; | |
783 | serial->num_bulk_out = num_bulk_out; | |
784 | serial->num_interrupt_in = num_interrupt_in; | |
785 | serial->num_interrupt_out = num_interrupt_out; | |
786 | ||
787 | /* create our ports, we need as many as the max endpoints */ | |
788 | /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */ | |
789 | max_endpoints = max(num_bulk_in, num_bulk_out); | |
790 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
791 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
792 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
793 | serial->num_port_pointers = max_endpoints; | |
794 | dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints); | |
795 | for (i = 0; i < max_endpoints; ++i) { | |
80b6ca48 | 796 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
797 | if (!port) |
798 | goto probe_error; | |
1da177e4 LT |
799 | port->number = i + serial->minor; |
800 | port->serial = serial; | |
507ca9bc | 801 | spin_lock_init(&port->lock); |
1ce7dd26 | 802 | mutex_init(&port->mutex); |
c4028958 | 803 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
804 | serial->port[i] = port; |
805 | } | |
806 | ||
807 | /* set up the endpoint information */ | |
808 | for (i = 0; i < num_bulk_in; ++i) { | |
809 | endpoint = bulk_in_endpoint[i]; | |
810 | port = serial->port[i]; | |
811 | port->read_urb = usb_alloc_urb (0, GFP_KERNEL); | |
812 | if (!port->read_urb) { | |
813 | dev_err(&interface->dev, "No free urbs available\n"); | |
814 | goto probe_error; | |
815 | } | |
816 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
817 | port->bulk_in_size = buffer_size; | |
818 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
819 | port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
820 | if (!port->bulk_in_buffer) { | |
821 | dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n"); | |
822 | goto probe_error; | |
823 | } | |
824 | usb_fill_bulk_urb (port->read_urb, dev, | |
825 | usb_rcvbulkpipe (dev, | |
826 | endpoint->bEndpointAddress), | |
827 | port->bulk_in_buffer, buffer_size, | |
828 | serial->type->read_bulk_callback, | |
829 | port); | |
830 | } | |
831 | ||
832 | for (i = 0; i < num_bulk_out; ++i) { | |
833 | endpoint = bulk_out_endpoint[i]; | |
834 | port = serial->port[i]; | |
835 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
836 | if (!port->write_urb) { | |
837 | dev_err(&interface->dev, "No free urbs available\n"); | |
838 | goto probe_error; | |
839 | } | |
840 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
841 | port->bulk_out_size = buffer_size; | |
842 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
843 | port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
844 | if (!port->bulk_out_buffer) { | |
845 | dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n"); | |
846 | goto probe_error; | |
847 | } | |
848 | usb_fill_bulk_urb (port->write_urb, dev, | |
849 | usb_sndbulkpipe (dev, | |
850 | endpoint->bEndpointAddress), | |
851 | port->bulk_out_buffer, buffer_size, | |
852 | serial->type->write_bulk_callback, | |
853 | port); | |
854 | } | |
855 | ||
856 | if (serial->type->read_int_callback) { | |
857 | for (i = 0; i < num_interrupt_in; ++i) { | |
858 | endpoint = interrupt_in_endpoint[i]; | |
859 | port = serial->port[i]; | |
860 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
861 | if (!port->interrupt_in_urb) { | |
862 | dev_err(&interface->dev, "No free urbs available\n"); | |
863 | goto probe_error; | |
864 | } | |
865 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
866 | port->interrupt_in_endpointAddress = endpoint->bEndpointAddress; | |
867 | port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
868 | if (!port->interrupt_in_buffer) { | |
869 | dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n"); | |
870 | goto probe_error; | |
871 | } | |
872 | usb_fill_int_urb (port->interrupt_in_urb, dev, | |
873 | usb_rcvintpipe (dev, | |
874 | endpoint->bEndpointAddress), | |
875 | port->interrupt_in_buffer, buffer_size, | |
876 | serial->type->read_int_callback, port, | |
877 | endpoint->bInterval); | |
878 | } | |
879 | } else if (num_interrupt_in) { | |
880 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
881 | } | |
882 | ||
883 | if (serial->type->write_int_callback) { | |
884 | for (i = 0; i < num_interrupt_out; ++i) { | |
885 | endpoint = interrupt_out_endpoint[i]; | |
886 | port = serial->port[i]; | |
887 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
888 | if (!port->interrupt_out_urb) { | |
889 | dev_err(&interface->dev, "No free urbs available\n"); | |
890 | goto probe_error; | |
891 | } | |
892 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
893 | port->interrupt_out_size = buffer_size; | |
894 | port->interrupt_out_endpointAddress = endpoint->bEndpointAddress; | |
895 | port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
896 | if (!port->interrupt_out_buffer) { | |
897 | dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n"); | |
898 | goto probe_error; | |
899 | } | |
900 | usb_fill_int_urb (port->interrupt_out_urb, dev, | |
901 | usb_sndintpipe (dev, | |
902 | endpoint->bEndpointAddress), | |
903 | port->interrupt_out_buffer, buffer_size, | |
904 | serial->type->write_int_callback, port, | |
905 | endpoint->bInterval); | |
906 | } | |
907 | } else if (num_interrupt_out) { | |
908 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
909 | } | |
910 | ||
911 | /* if this device type has an attach function, call it */ | |
912 | if (type->attach) { | |
18fcac35 | 913 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
914 | dev_err(&interface->dev, "module get failed, exiting\n"); |
915 | goto probe_error; | |
916 | } | |
917 | retval = type->attach (serial); | |
18fcac35 | 918 | module_put(type->driver.owner); |
1da177e4 LT |
919 | if (retval < 0) |
920 | goto probe_error; | |
921 | if (retval > 0) { | |
922 | /* quietly accept this device, but don't bind to a serial port | |
923 | * as it's about to disappear */ | |
924 | goto exit; | |
925 | } | |
926 | } | |
927 | ||
928 | /* register all of the individual ports with the driver core */ | |
929 | for (i = 0; i < num_ports; ++i) { | |
930 | port = serial->port[i]; | |
931 | port->dev.parent = &interface->dev; | |
932 | port->dev.driver = NULL; | |
933 | port->dev.bus = &usb_serial_bus_type; | |
934 | port->dev.release = &port_release; | |
935 | ||
936 | snprintf (&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number); | |
937 | dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id); | |
13f4db9e GKH |
938 | retval = device_register(&port->dev); |
939 | if (retval) | |
940 | dev_err(&port->dev, "Error registering port device, " | |
941 | "continuing\n"); | |
1da177e4 LT |
942 | } |
943 | ||
944 | usb_serial_console_init (debug, minor); | |
945 | ||
946 | exit: | |
947 | /* success */ | |
948 | usb_set_intfdata (interface, serial); | |
949 | return 0; | |
950 | ||
951 | probe_error: | |
952 | for (i = 0; i < num_bulk_in; ++i) { | |
953 | port = serial->port[i]; | |
954 | if (!port) | |
955 | continue; | |
956 | if (port->read_urb) | |
957 | usb_free_urb (port->read_urb); | |
958 | kfree(port->bulk_in_buffer); | |
959 | } | |
960 | for (i = 0; i < num_bulk_out; ++i) { | |
961 | port = serial->port[i]; | |
962 | if (!port) | |
963 | continue; | |
964 | if (port->write_urb) | |
965 | usb_free_urb (port->write_urb); | |
966 | kfree(port->bulk_out_buffer); | |
967 | } | |
968 | for (i = 0; i < num_interrupt_in; ++i) { | |
969 | port = serial->port[i]; | |
970 | if (!port) | |
971 | continue; | |
972 | if (port->interrupt_in_urb) | |
973 | usb_free_urb (port->interrupt_in_urb); | |
974 | kfree(port->interrupt_in_buffer); | |
975 | } | |
976 | for (i = 0; i < num_interrupt_out; ++i) { | |
977 | port = serial->port[i]; | |
978 | if (!port) | |
979 | continue; | |
980 | if (port->interrupt_out_urb) | |
981 | usb_free_urb (port->interrupt_out_urb); | |
982 | kfree(port->interrupt_out_buffer); | |
983 | } | |
984 | ||
985 | /* return the minor range that this device had */ | |
986 | return_serial (serial); | |
987 | ||
988 | /* free up any memory that we allocated */ | |
989 | for (i = 0; i < serial->num_port_pointers; ++i) | |
990 | kfree(serial->port[i]); | |
991 | kfree (serial); | |
992 | return -EIO; | |
993 | } | |
994 | ||
995 | void usb_serial_disconnect(struct usb_interface *interface) | |
996 | { | |
997 | int i; | |
998 | struct usb_serial *serial = usb_get_intfdata (interface); | |
999 | struct device *dev = &interface->dev; | |
1000 | struct usb_serial_port *port; | |
1001 | ||
73e487fd | 1002 | usb_serial_console_disconnect(serial); |
1da177e4 LT |
1003 | dbg ("%s", __FUNCTION__); |
1004 | ||
1005 | usb_set_intfdata (interface, NULL); | |
1006 | if (serial) { | |
1007 | for (i = 0; i < serial->num_ports; ++i) { | |
1008 | port = serial->port[i]; | |
1009 | if (port && port->tty) | |
1010 | tty_hangup(port->tty); | |
1011 | } | |
1012 | /* let the last holder of this object | |
1013 | * cause it to be cleaned up */ | |
73e487fd | 1014 | usb_serial_put(serial); |
1da177e4 LT |
1015 | } |
1016 | dev_info(dev, "device disconnected\n"); | |
1017 | } | |
1018 | ||
b68e31d0 | 1019 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1020 | .open = serial_open, |
1021 | .close = serial_close, | |
1022 | .write = serial_write, | |
1023 | .write_room = serial_write_room, | |
1024 | .ioctl = serial_ioctl, | |
1025 | .set_termios = serial_set_termios, | |
1026 | .throttle = serial_throttle, | |
1027 | .unthrottle = serial_unthrottle, | |
1028 | .break_ctl = serial_break, | |
1029 | .chars_in_buffer = serial_chars_in_buffer, | |
1030 | .read_proc = serial_read_proc, | |
1031 | .tiocmget = serial_tiocmget, | |
1032 | .tiocmset = serial_tiocmset, | |
1033 | }; | |
1034 | ||
1035 | struct tty_driver *usb_serial_tty_driver; | |
1036 | ||
1037 | static int __init usb_serial_init(void) | |
1038 | { | |
1039 | int i; | |
1040 | int result; | |
1041 | ||
1042 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1043 | if (!usb_serial_tty_driver) | |
1044 | return -ENOMEM; | |
1045 | ||
1046 | /* Initialize our global data */ | |
1047 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1048 | serial_table[i] = NULL; | |
1049 | } | |
1050 | ||
1051 | result = bus_register(&usb_serial_bus_type); | |
1052 | if (result) { | |
1053 | err("%s - registering bus driver failed", __FUNCTION__); | |
1054 | goto exit_bus; | |
1055 | } | |
1056 | ||
1da177e4 LT |
1057 | usb_serial_tty_driver->owner = THIS_MODULE; |
1058 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1059 | usb_serial_tty_driver->name = "ttyUSB"; |
1060 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1061 | usb_serial_tty_driver->minor_start = 0; | |
1062 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1063 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
331b8319 | 1064 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1065 | usb_serial_tty_driver->init_termios = tty_std_termios; |
1066 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1067 | tty_set_operations(usb_serial_tty_driver, &serial_ops); | |
1068 | result = tty_register_driver(usb_serial_tty_driver); | |
1069 | if (result) { | |
1070 | err("%s - tty_register_driver failed", __FUNCTION__); | |
1071 | goto exit_reg_driver; | |
1072 | } | |
1073 | ||
1074 | /* register the USB driver */ | |
1075 | result = usb_register(&usb_serial_driver); | |
1076 | if (result < 0) { | |
1077 | err("%s - usb_register failed", __FUNCTION__); | |
1078 | goto exit_tty; | |
1079 | } | |
1080 | ||
06299db3 GKH |
1081 | /* register the generic driver, if we should */ |
1082 | result = usb_serial_generic_register(debug); | |
1083 | if (result < 0) { | |
1084 | err("%s - registering generic driver failed", __FUNCTION__); | |
1085 | goto exit_generic; | |
1086 | } | |
1087 | ||
17a882fc | 1088 | info(DRIVER_DESC); |
1da177e4 LT |
1089 | |
1090 | return result; | |
1091 | ||
06299db3 GKH |
1092 | exit_generic: |
1093 | usb_deregister(&usb_serial_driver); | |
1094 | ||
1da177e4 LT |
1095 | exit_tty: |
1096 | tty_unregister_driver(usb_serial_tty_driver); | |
1097 | ||
1098 | exit_reg_driver: | |
1da177e4 LT |
1099 | bus_unregister(&usb_serial_bus_type); |
1100 | ||
1101 | exit_bus: | |
1102 | err ("%s - returning with error %d", __FUNCTION__, result); | |
1103 | put_tty_driver(usb_serial_tty_driver); | |
1104 | return result; | |
1105 | } | |
1106 | ||
1107 | ||
1108 | static void __exit usb_serial_exit(void) | |
1109 | { | |
1110 | usb_serial_console_exit(); | |
1111 | ||
1112 | usb_serial_generic_deregister(); | |
1113 | ||
1114 | usb_deregister(&usb_serial_driver); | |
1115 | tty_unregister_driver(usb_serial_tty_driver); | |
1116 | put_tty_driver(usb_serial_tty_driver); | |
1117 | bus_unregister(&usb_serial_bus_type); | |
1118 | } | |
1119 | ||
1120 | ||
1121 | module_init(usb_serial_init); | |
1122 | module_exit(usb_serial_exit); | |
1123 | ||
1124 | #define set_to_generic_if_null(type, function) \ | |
1125 | do { \ | |
1126 | if (!type->function) { \ | |
1127 | type->function = usb_serial_generic_##function; \ | |
1128 | dbg("Had to override the " #function \ | |
1129 | " usb serial operation with the generic one.");\ | |
1130 | } \ | |
1131 | } while (0) | |
1132 | ||
ea65370d | 1133 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1134 | { |
1135 | set_to_generic_if_null(device, open); | |
1136 | set_to_generic_if_null(device, write); | |
1137 | set_to_generic_if_null(device, close); | |
1138 | set_to_generic_if_null(device, write_room); | |
1139 | set_to_generic_if_null(device, chars_in_buffer); | |
1140 | set_to_generic_if_null(device, read_bulk_callback); | |
1141 | set_to_generic_if_null(device, write_bulk_callback); | |
1142 | set_to_generic_if_null(device, shutdown); | |
1143 | } | |
1144 | ||
ea65370d | 1145 | int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 LT |
1146 | { |
1147 | int retval; | |
1148 | ||
ea65370d | 1149 | fixup_generic(driver); |
1da177e4 | 1150 | |
269bda1c GKH |
1151 | if (!driver->description) |
1152 | driver->description = driver->driver.name; | |
1153 | ||
1da177e4 | 1154 | /* Add this device to our list of devices */ |
ea65370d | 1155 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1156 | |
ea65370d | 1157 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1158 | if (retval) { |
269bda1c | 1159 | err("problem %d when registering driver %s", retval, driver->description); |
ea65370d | 1160 | list_del(&driver->driver_list); |
1da177e4 LT |
1161 | } |
1162 | else | |
269bda1c | 1163 | info("USB Serial support registered for %s", driver->description); |
1da177e4 LT |
1164 | |
1165 | return retval; | |
1166 | } | |
1167 | ||
1168 | ||
ea65370d | 1169 | void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1170 | { |
269bda1c | 1171 | info("USB Serial deregistering driver %s", device->description); |
1da177e4 LT |
1172 | list_del(&device->driver_list); |
1173 | usb_serial_bus_deregister(device); | |
1174 | } | |
1175 | ||
1176 | ||
1177 | ||
1178 | /* If the usb-serial core is built into the core, the usb-serial drivers | |
1179 | need these symbols to load properly as modules. */ | |
1180 | EXPORT_SYMBOL_GPL(usb_serial_register); | |
1181 | EXPORT_SYMBOL_GPL(usb_serial_deregister); | |
1182 | EXPORT_SYMBOL_GPL(usb_serial_probe); | |
1183 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); | |
1184 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); | |
1185 | ||
1186 | ||
1187 | /* Module information */ | |
1188 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1189 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1da177e4 LT |
1190 | MODULE_LICENSE("GPL"); |
1191 | ||
1192 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1193 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |