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 */ | |
34ef50e5 | 62 | static spinlock_t table_lock; |
1da177e4 LT |
63 | static LIST_HEAD(usb_serial_driver_list); |
64 | ||
65 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
66 | { | |
34ef50e5 ON |
67 | struct usb_serial *serial; |
68 | ||
69 | spin_lock(&table_lock); | |
70 | serial = serial_table[index]; | |
1da177e4 LT |
71 | |
72 | if (serial) | |
73 | kref_get(&serial->kref); | |
34ef50e5 | 74 | spin_unlock(&table_lock); |
1da177e4 LT |
75 | return serial; |
76 | } | |
77 | ||
78 | static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor) | |
79 | { | |
80 | unsigned int i, j; | |
81 | int good_spot; | |
82 | ||
83 | dbg("%s %d", __FUNCTION__, num_ports); | |
84 | ||
85 | *minor = 0; | |
34ef50e5 | 86 | spin_lock(&table_lock); |
1da177e4 LT |
87 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
88 | if (serial_table[i]) | |
89 | continue; | |
90 | ||
91 | good_spot = 1; | |
92 | for (j = 1; j <= num_ports-1; ++j) | |
93 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
94 | good_spot = 0; | |
95 | i += j; | |
96 | break; | |
97 | } | |
98 | if (good_spot == 0) | |
99 | continue; | |
100 | ||
101 | *minor = i; | |
102 | dbg("%s - minor base = %d", __FUNCTION__, *minor); | |
103 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) | |
104 | serial_table[i] = serial; | |
34ef50e5 | 105 | spin_unlock(&table_lock); |
1da177e4 LT |
106 | return serial; |
107 | } | |
34ef50e5 | 108 | spin_unlock(&table_lock); |
1da177e4 LT |
109 | return NULL; |
110 | } | |
111 | ||
112 | static void return_serial(struct usb_serial *serial) | |
113 | { | |
114 | int i; | |
115 | ||
116 | dbg("%s", __FUNCTION__); | |
117 | ||
118 | if (serial == NULL) | |
119 | return; | |
120 | ||
34ef50e5 | 121 | spin_lock(&table_lock); |
1da177e4 LT |
122 | for (i = 0; i < serial->num_ports; ++i) { |
123 | serial_table[serial->minor + i] = NULL; | |
124 | } | |
34ef50e5 | 125 | spin_unlock(&table_lock); |
1da177e4 LT |
126 | } |
127 | ||
128 | static void destroy_serial(struct kref *kref) | |
129 | { | |
130 | struct usb_serial *serial; | |
131 | struct usb_serial_port *port; | |
132 | int i; | |
133 | ||
134 | serial = to_usb_serial(kref); | |
135 | ||
269bda1c | 136 | dbg("%s - %s", __FUNCTION__, serial->type->description); |
1da177e4 LT |
137 | |
138 | serial->type->shutdown(serial); | |
139 | ||
140 | /* return the minor range that this device had */ | |
141 | return_serial(serial); | |
142 | ||
143 | for (i = 0; i < serial->num_ports; ++i) | |
144 | serial->port[i]->open_count = 0; | |
145 | ||
146 | /* the ports are cleaned up and released in port_release() */ | |
147 | for (i = 0; i < serial->num_ports; ++i) | |
148 | if (serial->port[i]->dev.parent != NULL) { | |
149 | device_unregister(&serial->port[i]->dev); | |
150 | serial->port[i] = NULL; | |
151 | } | |
152 | ||
153 | /* If this is a "fake" port, we have to clean it up here, as it will | |
154 | * not get cleaned up in port_release() as it was never registered with | |
155 | * the driver core */ | |
156 | if (serial->num_ports < serial->num_port_pointers) { | |
157 | for (i = serial->num_ports; i < serial->num_port_pointers; ++i) { | |
158 | port = serial->port[i]; | |
159 | if (!port) | |
160 | continue; | |
34f8e761 | 161 | port_free(port); |
1da177e4 LT |
162 | } |
163 | } | |
164 | ||
165 | usb_put_dev(serial->dev); | |
166 | ||
167 | /* free up any memory that we allocated */ | |
168 | kfree (serial); | |
169 | } | |
170 | ||
73e487fd GL |
171 | void usb_serial_put(struct usb_serial *serial) |
172 | { | |
173 | kref_put(&serial->kref, destroy_serial); | |
174 | } | |
175 | ||
1da177e4 LT |
176 | /***************************************************************************** |
177 | * Driver tty interface functions | |
178 | *****************************************************************************/ | |
179 | static int serial_open (struct tty_struct *tty, struct file * filp) | |
180 | { | |
181 | struct usb_serial *serial; | |
182 | struct usb_serial_port *port; | |
183 | unsigned int portNumber; | |
184 | int retval; | |
185 | ||
186 | dbg("%s", __FUNCTION__); | |
187 | ||
188 | /* get the serial object associated with this tty pointer */ | |
189 | serial = usb_serial_get_by_index(tty->index); | |
190 | if (!serial) { | |
191 | tty->driver_data = NULL; | |
192 | return -ENODEV; | |
193 | } | |
194 | ||
195 | portNumber = tty->index - serial->minor; | |
196 | port = serial->port[portNumber]; | |
71a84163 LFC |
197 | if (!port) { |
198 | retval = -ENODEV; | |
199 | goto bailout_kref_put; | |
200 | } | |
8a4613f0 | 201 | |
71a84163 LFC |
202 | if (mutex_lock_interruptible(&port->mutex)) { |
203 | retval = -ERESTARTSYS; | |
204 | goto bailout_kref_put; | |
205 | } | |
1da177e4 LT |
206 | |
207 | ++port->open_count; | |
208 | ||
ca85485c PF |
209 | /* set up our port structure making the tty driver |
210 | * remember our port object, and us it */ | |
211 | tty->driver_data = port; | |
212 | port->tty = tty; | |
1da177e4 | 213 | |
ca85485c | 214 | if (port->open_count == 1) { |
1da177e4 LT |
215 | |
216 | /* lock this module before we call it | |
217 | * this may fail, which means we must bail out, | |
218 | * safe because we are called with BKL held */ | |
18fcac35 | 219 | if (!try_module_get(serial->type->driver.owner)) { |
1da177e4 | 220 | retval = -ENODEV; |
71a84163 | 221 | goto bailout_mutex_unlock; |
1da177e4 LT |
222 | } |
223 | ||
224 | /* only call the device specific open if this | |
225 | * is the first time the port is opened */ | |
226 | retval = serial->type->open(port, filp); | |
227 | if (retval) | |
228 | goto bailout_module_put; | |
229 | } | |
230 | ||
1ce7dd26 | 231 | mutex_unlock(&port->mutex); |
1da177e4 LT |
232 | return 0; |
233 | ||
234 | bailout_module_put: | |
18fcac35 | 235 | module_put(serial->type->driver.owner); |
71a84163 | 236 | bailout_mutex_unlock: |
1da177e4 | 237 | port->open_count = 0; |
b059c81a FG |
238 | tty->driver_data = NULL; |
239 | port->tty = NULL; | |
1ce7dd26 | 240 | mutex_unlock(&port->mutex); |
71a84163 | 241 | bailout_kref_put: |
73e487fd | 242 | usb_serial_put(serial); |
1da177e4 LT |
243 | return retval; |
244 | } | |
245 | ||
246 | static void serial_close(struct tty_struct *tty, struct file * filp) | |
247 | { | |
81671ddb | 248 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
249 | |
250 | if (!port) | |
251 | return; | |
252 | ||
253 | dbg("%s - port %d", __FUNCTION__, port->number); | |
254 | ||
1ce7dd26 | 255 | mutex_lock(&port->mutex); |
8a4613f0 | 256 | |
91c0bce2 | 257 | if (port->open_count == 0) { |
1ce7dd26 | 258 | mutex_unlock(&port->mutex); |
91c0bce2 GKH |
259 | return; |
260 | } | |
1da177e4 LT |
261 | |
262 | --port->open_count; | |
263 | if (port->open_count == 0) { | |
264 | /* only call the device specific close if this | |
265 | * port is being closed by the last owner */ | |
266 | port->serial->type->close(port, filp); | |
267 | ||
268 | if (port->tty) { | |
269 | if (port->tty->driver_data) | |
270 | port->tty->driver_data = NULL; | |
271 | port->tty = NULL; | |
272 | } | |
273 | ||
18fcac35 | 274 | module_put(port->serial->type->driver.owner); |
1da177e4 LT |
275 | } |
276 | ||
1ce7dd26 | 277 | mutex_unlock(&port->mutex); |
73e487fd | 278 | usb_serial_put(port->serial); |
1da177e4 LT |
279 | } |
280 | ||
281 | static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) | |
282 | { | |
81671ddb | 283 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
284 | int retval = -EINVAL; |
285 | ||
73e487fd | 286 | if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
287 | goto exit; |
288 | ||
1da177e4 LT |
289 | dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count); |
290 | ||
291 | if (!port->open_count) { | |
292 | dbg("%s - port not opened", __FUNCTION__); | |
293 | goto exit; | |
294 | } | |
295 | ||
296 | /* pass on to the driver specific version of this function */ | |
297 | retval = port->serial->type->write(port, buf, count); | |
298 | ||
299 | exit: | |
300 | return retval; | |
301 | } | |
302 | ||
303 | static int serial_write_room (struct tty_struct *tty) | |
304 | { | |
81671ddb | 305 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 306 | int retval = -ENODEV; |
1da177e4 | 307 | |
487f9c67 LFC |
308 | if (!port) |
309 | goto exit; | |
310 | ||
1da177e4 LT |
311 | dbg("%s - port %d", __FUNCTION__, port->number); |
312 | ||
313 | if (!port->open_count) { | |
314 | dbg("%s - port not open", __FUNCTION__); | |
315 | goto exit; | |
316 | } | |
317 | ||
318 | /* pass on to the driver specific version of this function */ | |
319 | retval = port->serial->type->write_room(port); | |
320 | ||
321 | exit: | |
322 | return retval; | |
323 | } | |
324 | ||
325 | static int serial_chars_in_buffer (struct tty_struct *tty) | |
326 | { | |
81671ddb | 327 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 328 | int retval = -ENODEV; |
1da177e4 | 329 | |
487f9c67 LFC |
330 | if (!port) |
331 | goto exit; | |
332 | ||
1da177e4 LT |
333 | dbg("%s = port %d", __FUNCTION__, port->number); |
334 | ||
335 | if (!port->open_count) { | |
336 | dbg("%s - port not open", __FUNCTION__); | |
337 | goto exit; | |
338 | } | |
339 | ||
340 | /* pass on to the driver specific version of this function */ | |
341 | retval = port->serial->type->chars_in_buffer(port); | |
342 | ||
343 | exit: | |
344 | return retval; | |
345 | } | |
346 | ||
347 | static void serial_throttle (struct tty_struct * tty) | |
348 | { | |
81671ddb | 349 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 350 | |
487f9c67 LFC |
351 | if (!port) |
352 | return; | |
353 | ||
1da177e4 LT |
354 | dbg("%s - port %d", __FUNCTION__, port->number); |
355 | ||
356 | if (!port->open_count) { | |
357 | dbg ("%s - port not open", __FUNCTION__); | |
358 | return; | |
359 | } | |
360 | ||
361 | /* pass on to the driver specific version of this function */ | |
362 | if (port->serial->type->throttle) | |
363 | port->serial->type->throttle(port); | |
364 | } | |
365 | ||
366 | static void serial_unthrottle (struct tty_struct * tty) | |
367 | { | |
81671ddb | 368 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 369 | |
487f9c67 LFC |
370 | if (!port) |
371 | return; | |
372 | ||
1da177e4 LT |
373 | dbg("%s - port %d", __FUNCTION__, port->number); |
374 | ||
375 | if (!port->open_count) { | |
376 | dbg("%s - port not open", __FUNCTION__); | |
377 | return; | |
378 | } | |
379 | ||
380 | /* pass on to the driver specific version of this function */ | |
381 | if (port->serial->type->unthrottle) | |
382 | port->serial->type->unthrottle(port); | |
383 | } | |
384 | ||
385 | static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) | |
386 | { | |
81671ddb | 387 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
388 | int retval = -ENODEV; |
389 | ||
487f9c67 LFC |
390 | if (!port) |
391 | goto exit; | |
392 | ||
1da177e4 LT |
393 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); |
394 | ||
395 | if (!port->open_count) { | |
396 | dbg ("%s - port not open", __FUNCTION__); | |
397 | goto exit; | |
398 | } | |
399 | ||
400 | /* pass on to the driver specific version of this function if it is available */ | |
401 | if (port->serial->type->ioctl) | |
402 | retval = port->serial->type->ioctl(port, file, cmd, arg); | |
403 | else | |
404 | retval = -ENOIOCTLCMD; | |
405 | ||
406 | exit: | |
407 | return retval; | |
408 | } | |
409 | ||
606d099c | 410 | static void serial_set_termios (struct tty_struct *tty, struct ktermios * old) |
1da177e4 | 411 | { |
81671ddb | 412 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 413 | |
487f9c67 LFC |
414 | if (!port) |
415 | return; | |
416 | ||
1da177e4 LT |
417 | dbg("%s - port %d", __FUNCTION__, port->number); |
418 | ||
419 | if (!port->open_count) { | |
420 | dbg("%s - port not open", __FUNCTION__); | |
421 | return; | |
422 | } | |
423 | ||
424 | /* pass on to the driver specific version of this function if it is available */ | |
425 | if (port->serial->type->set_termios) | |
426 | port->serial->type->set_termios(port, old); | |
427 | } | |
428 | ||
429 | static void serial_break (struct tty_struct *tty, int break_state) | |
430 | { | |
81671ddb | 431 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 432 | |
487f9c67 LFC |
433 | if (!port) |
434 | return; | |
435 | ||
1da177e4 LT |
436 | dbg("%s - port %d", __FUNCTION__, port->number); |
437 | ||
438 | if (!port->open_count) { | |
439 | dbg("%s - port not open", __FUNCTION__); | |
440 | return; | |
441 | } | |
442 | ||
443 | /* pass on to the driver specific version of this function if it is available */ | |
444 | if (port->serial->type->break_ctl) | |
445 | port->serial->type->break_ctl(port, break_state); | |
446 | } | |
447 | ||
448 | static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) | |
449 | { | |
450 | struct usb_serial *serial; | |
451 | int length = 0; | |
452 | int i; | |
453 | off_t begin = 0; | |
454 | char tmp[40]; | |
455 | ||
456 | dbg("%s", __FUNCTION__); | |
17a882fc | 457 | length += sprintf (page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
458 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
459 | serial = usb_serial_get_by_index(i); | |
460 | if (serial == NULL) | |
461 | continue; | |
462 | ||
463 | length += sprintf (page+length, "%d:", i); | |
18fcac35 GKH |
464 | if (serial->type->driver.owner) |
465 | length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner)); | |
269bda1c | 466 | length += sprintf (page+length, " name:\"%s\"", serial->type->description); |
1da177e4 LT |
467 | length += sprintf (page+length, " vendor:%04x product:%04x", |
468 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
469 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
470 | length += sprintf (page+length, " num_ports:%d", serial->num_ports); | |
471 | length += sprintf (page+length, " port:%d", i - serial->minor + 1); | |
472 | ||
473 | usb_make_path(serial->dev, tmp, sizeof(tmp)); | |
474 | length += sprintf (page+length, " path:%s", tmp); | |
475 | ||
476 | length += sprintf (page+length, "\n"); | |
59925838 MU |
477 | if ((length + begin) > (off + count)) { |
478 | usb_serial_put(serial); | |
1da177e4 | 479 | goto done; |
59925838 | 480 | } |
1da177e4 LT |
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 | ||
c4028958 | 546 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 547 | { |
c4028958 DH |
548 | struct usb_serial_port *port = |
549 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
550 | struct tty_struct *tty; |
551 | ||
552 | dbg("%s - port %d", __FUNCTION__, port->number); | |
553 | ||
554 | if (!port) | |
555 | return; | |
556 | ||
557 | tty = port->tty; | |
558 | if (!tty) | |
559 | return; | |
560 | ||
561 | tty_wakeup(tty); | |
562 | } | |
563 | ||
564 | static void port_release(struct device *dev) | |
565 | { | |
566 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
567 | ||
568 | dbg ("%s - %s", __FUNCTION__, dev->bus_id); | |
34f8e761 PZ |
569 | port_free(port); |
570 | } | |
571 | ||
34ef50e5 | 572 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 573 | { |
1da177e4 | 574 | usb_kill_urb(port->read_urb); |
1da177e4 | 575 | usb_kill_urb(port->write_urb); |
1da177e4 | 576 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 577 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
578 | } |
579 | ||
580 | static void port_free(struct usb_serial_port *port) | |
581 | { | |
582 | kill_traffic(port); | |
583 | usb_free_urb(port->read_urb); | |
584 | usb_free_urb(port->write_urb); | |
585 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 LT |
586 | usb_free_urb(port->interrupt_out_urb); |
587 | kfree(port->bulk_in_buffer); | |
588 | kfree(port->bulk_out_buffer); | |
589 | kfree(port->interrupt_in_buffer); | |
590 | kfree(port->interrupt_out_buffer); | |
34f8e761 | 591 | flush_scheduled_work(); /* port->work */ |
1da177e4 LT |
592 | kfree(port); |
593 | } | |
594 | ||
595 | static struct usb_serial * create_serial (struct usb_device *dev, | |
596 | struct usb_interface *interface, | |
ea65370d | 597 | struct usb_serial_driver *driver) |
1da177e4 LT |
598 | { |
599 | struct usb_serial *serial; | |
600 | ||
80b6ca48 | 601 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 LT |
602 | if (!serial) { |
603 | dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); | |
604 | return NULL; | |
605 | } | |
1da177e4 | 606 | serial->dev = usb_get_dev(dev); |
ea65370d | 607 | serial->type = driver; |
1da177e4 LT |
608 | serial->interface = interface; |
609 | kref_init(&serial->kref); | |
610 | ||
611 | return serial; | |
612 | } | |
613 | ||
93bacefc GKH |
614 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
615 | struct usb_serial_driver *drv) | |
616 | { | |
617 | struct usb_dynid *dynid; | |
618 | ||
619 | spin_lock(&drv->dynids.lock); | |
620 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
621 | if (usb_match_one_id(intf, &dynid->id)) { | |
622 | spin_unlock(&drv->dynids.lock); | |
623 | return &dynid->id; | |
624 | } | |
625 | } | |
626 | spin_unlock(&drv->dynids.lock); | |
627 | return NULL; | |
628 | } | |
629 | ||
630 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
631 | struct usb_interface *intf) | |
632 | { | |
633 | const struct usb_device_id *id; | |
634 | ||
635 | id = usb_match_id(intf, drv->id_table); | |
636 | if (id) { | |
637 | dbg("static descriptor matches"); | |
638 | goto exit; | |
639 | } | |
640 | id = match_dynamic_id(intf, drv); | |
641 | if (id) | |
642 | dbg("dynamic descriptor matches"); | |
643 | exit: | |
644 | return id; | |
645 | } | |
646 | ||
ea65370d | 647 | static struct usb_serial_driver *search_serial_device(struct usb_interface *iface) |
1da177e4 LT |
648 | { |
649 | struct list_head *p; | |
650 | const struct usb_device_id *id; | |
ea65370d | 651 | struct usb_serial_driver *t; |
1da177e4 | 652 | |
93b1fae4 | 653 | /* Check if the usb id matches a known device */ |
1da177e4 | 654 | list_for_each(p, &usb_serial_driver_list) { |
ea65370d | 655 | t = list_entry(p, struct usb_serial_driver, driver_list); |
93bacefc GKH |
656 | id = get_iface_id(t, iface); |
657 | if (id) | |
1da177e4 | 658 | return t; |
1da177e4 LT |
659 | } |
660 | ||
661 | return NULL; | |
662 | } | |
663 | ||
664 | int usb_serial_probe(struct usb_interface *interface, | |
665 | const struct usb_device_id *id) | |
666 | { | |
667 | struct usb_device *dev = interface_to_usbdev (interface); | |
668 | struct usb_serial *serial = NULL; | |
669 | struct usb_serial_port *port; | |
670 | struct usb_host_interface *iface_desc; | |
671 | struct usb_endpoint_descriptor *endpoint; | |
672 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
673 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
674 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
675 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 676 | struct usb_serial_driver *type = NULL; |
1da177e4 LT |
677 | int retval; |
678 | int minor; | |
679 | int buffer_size; | |
680 | int i; | |
681 | int num_interrupt_in = 0; | |
682 | int num_interrupt_out = 0; | |
683 | int num_bulk_in = 0; | |
684 | int num_bulk_out = 0; | |
685 | int num_ports = 0; | |
686 | int max_endpoints; | |
687 | ||
4b10f0f3 | 688 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
689 | type = search_serial_device(interface); |
690 | if (!type) { | |
4b10f0f3 | 691 | unlock_kernel(); |
1da177e4 LT |
692 | dbg("none matched"); |
693 | return -ENODEV; | |
694 | } | |
695 | ||
696 | serial = create_serial (dev, interface, type); | |
697 | if (!serial) { | |
4b10f0f3 | 698 | unlock_kernel(); |
1da177e4 LT |
699 | dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); |
700 | return -ENOMEM; | |
701 | } | |
702 | ||
703 | /* if this device type has a probe function, call it */ | |
704 | if (type->probe) { | |
705 | const struct usb_device_id *id; | |
706 | ||
18fcac35 | 707 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 708 | unlock_kernel(); |
1da177e4 LT |
709 | dev_err(&interface->dev, "module get failed, exiting\n"); |
710 | kfree (serial); | |
711 | return -EIO; | |
712 | } | |
713 | ||
93bacefc | 714 | id = get_iface_id(type, interface); |
1da177e4 | 715 | retval = type->probe(serial, id); |
18fcac35 | 716 | module_put(type->driver.owner); |
1da177e4 LT |
717 | |
718 | if (retval) { | |
4b10f0f3 | 719 | unlock_kernel(); |
1da177e4 LT |
720 | dbg ("sub driver rejected device"); |
721 | kfree (serial); | |
722 | return retval; | |
723 | } | |
724 | } | |
725 | ||
726 | /* descriptor matches, let's find the endpoints needed */ | |
727 | /* check out the endpoints */ | |
728 | iface_desc = interface->cur_altsetting; | |
729 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
730 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
731 | |
732 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
733 | /* we found a bulk in endpoint */ |
734 | dbg("found bulk in on endpoint %d", i); | |
735 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
736 | ++num_bulk_in; | |
737 | } | |
738 | ||
4fa1bbf5 | 739 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
740 | /* we found a bulk out endpoint */ |
741 | dbg("found bulk out on endpoint %d", i); | |
742 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
743 | ++num_bulk_out; | |
744 | } | |
4fa1bbf5 LFC |
745 | |
746 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
747 | /* we found a interrupt in endpoint */ |
748 | dbg("found interrupt in on endpoint %d", i); | |
749 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
750 | ++num_interrupt_in; | |
751 | } | |
752 | ||
4fa1bbf5 | 753 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
754 | /* we found an interrupt out endpoint */ |
755 | dbg("found interrupt out on endpoint %d", i); | |
756 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
757 | ++num_interrupt_out; | |
758 | } | |
759 | } | |
760 | ||
761 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
762 | /* BEGIN HORRIBLE HACK FOR PL2303 */ | |
763 | /* this is needed due to the looney way its endpoints are set up */ | |
764 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
765 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
766 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
767 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
768 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
769 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID))) { | |
1da177e4 LT |
770 | if (interface != dev->actconfig->interface[0]) { |
771 | /* check out the endpoints of the other interface*/ | |
772 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
773 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
774 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 775 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
776 | /* we found a interrupt in endpoint */ |
777 | dbg("found interrupt in for Prolific device on separate interface"); | |
778 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
779 | ++num_interrupt_in; | |
780 | } | |
781 | } | |
782 | } | |
783 | ||
784 | /* Now make sure the PL-2303 is configured correctly. | |
785 | * If not, give up now and hope this hack will work | |
786 | * properly during a later invocation of usb_serial_probe | |
787 | */ | |
788 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
4b10f0f3 | 789 | unlock_kernel(); |
1da177e4 LT |
790 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
791 | kfree (serial); | |
792 | return -ENODEV; | |
793 | } | |
794 | } | |
795 | /* END HORRIBLE HACK FOR PL2303 */ | |
796 | #endif | |
797 | ||
798 | /* found all that we need */ | |
269bda1c | 799 | dev_info(&interface->dev, "%s converter detected\n", type->description); |
1da177e4 LT |
800 | |
801 | #ifdef CONFIG_USB_SERIAL_GENERIC | |
802 | if (type == &usb_serial_generic_device) { | |
803 | num_ports = num_bulk_out; | |
804 | if (num_ports == 0) { | |
4b10f0f3 | 805 | unlock_kernel(); |
1da177e4 LT |
806 | dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n"); |
807 | kfree (serial); | |
808 | return -EIO; | |
809 | } | |
810 | } | |
811 | #endif | |
812 | if (!num_ports) { | |
813 | /* if this device type has a calc_num_ports function, call it */ | |
814 | if (type->calc_num_ports) { | |
18fcac35 | 815 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 816 | unlock_kernel(); |
1da177e4 LT |
817 | dev_err(&interface->dev, "module get failed, exiting\n"); |
818 | kfree (serial); | |
819 | return -EIO; | |
820 | } | |
821 | num_ports = type->calc_num_ports (serial); | |
18fcac35 | 822 | module_put(type->driver.owner); |
1da177e4 LT |
823 | } |
824 | if (!num_ports) | |
825 | num_ports = type->num_ports; | |
826 | } | |
827 | ||
1da177e4 LT |
828 | serial->minor = minor; |
829 | serial->num_ports = num_ports; | |
830 | serial->num_bulk_in = num_bulk_in; | |
831 | serial->num_bulk_out = num_bulk_out; | |
832 | serial->num_interrupt_in = num_interrupt_in; | |
833 | serial->num_interrupt_out = num_interrupt_out; | |
834 | ||
835 | /* create our ports, we need as many as the max endpoints */ | |
836 | /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */ | |
837 | max_endpoints = max(num_bulk_in, num_bulk_out); | |
838 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
839 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
840 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
841 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
842 | unlock_kernel(); |
843 | ||
1da177e4 LT |
844 | dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints); |
845 | for (i = 0; i < max_endpoints; ++i) { | |
80b6ca48 | 846 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
847 | if (!port) |
848 | goto probe_error; | |
1da177e4 LT |
849 | port->number = i + serial->minor; |
850 | port->serial = serial; | |
507ca9bc | 851 | spin_lock_init(&port->lock); |
1ce7dd26 | 852 | mutex_init(&port->mutex); |
c4028958 | 853 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
854 | serial->port[i] = port; |
855 | } | |
856 | ||
857 | /* set up the endpoint information */ | |
858 | for (i = 0; i < num_bulk_in; ++i) { | |
859 | endpoint = bulk_in_endpoint[i]; | |
860 | port = serial->port[i]; | |
861 | port->read_urb = usb_alloc_urb (0, GFP_KERNEL); | |
862 | if (!port->read_urb) { | |
863 | dev_err(&interface->dev, "No free urbs available\n"); | |
864 | goto probe_error; | |
865 | } | |
866 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
867 | port->bulk_in_size = buffer_size; | |
868 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
869 | port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
870 | if (!port->bulk_in_buffer) { | |
871 | dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n"); | |
872 | goto probe_error; | |
873 | } | |
874 | usb_fill_bulk_urb (port->read_urb, dev, | |
875 | usb_rcvbulkpipe (dev, | |
876 | endpoint->bEndpointAddress), | |
877 | port->bulk_in_buffer, buffer_size, | |
878 | serial->type->read_bulk_callback, | |
879 | port); | |
880 | } | |
881 | ||
882 | for (i = 0; i < num_bulk_out; ++i) { | |
883 | endpoint = bulk_out_endpoint[i]; | |
884 | port = serial->port[i]; | |
885 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
886 | if (!port->write_urb) { | |
887 | dev_err(&interface->dev, "No free urbs available\n"); | |
888 | goto probe_error; | |
889 | } | |
890 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
891 | port->bulk_out_size = buffer_size; | |
892 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
893 | port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
894 | if (!port->bulk_out_buffer) { | |
895 | dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n"); | |
896 | goto probe_error; | |
897 | } | |
898 | usb_fill_bulk_urb (port->write_urb, dev, | |
899 | usb_sndbulkpipe (dev, | |
900 | endpoint->bEndpointAddress), | |
901 | port->bulk_out_buffer, buffer_size, | |
902 | serial->type->write_bulk_callback, | |
903 | port); | |
904 | } | |
905 | ||
906 | if (serial->type->read_int_callback) { | |
907 | for (i = 0; i < num_interrupt_in; ++i) { | |
908 | endpoint = interrupt_in_endpoint[i]; | |
909 | port = serial->port[i]; | |
910 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
911 | if (!port->interrupt_in_urb) { | |
912 | dev_err(&interface->dev, "No free urbs available\n"); | |
913 | goto probe_error; | |
914 | } | |
915 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
916 | port->interrupt_in_endpointAddress = endpoint->bEndpointAddress; | |
917 | port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
918 | if (!port->interrupt_in_buffer) { | |
919 | dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n"); | |
920 | goto probe_error; | |
921 | } | |
922 | usb_fill_int_urb (port->interrupt_in_urb, dev, | |
923 | usb_rcvintpipe (dev, | |
924 | endpoint->bEndpointAddress), | |
925 | port->interrupt_in_buffer, buffer_size, | |
926 | serial->type->read_int_callback, port, | |
927 | endpoint->bInterval); | |
928 | } | |
929 | } else if (num_interrupt_in) { | |
930 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
931 | } | |
932 | ||
933 | if (serial->type->write_int_callback) { | |
934 | for (i = 0; i < num_interrupt_out; ++i) { | |
935 | endpoint = interrupt_out_endpoint[i]; | |
936 | port = serial->port[i]; | |
937 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
938 | if (!port->interrupt_out_urb) { | |
939 | dev_err(&interface->dev, "No free urbs available\n"); | |
940 | goto probe_error; | |
941 | } | |
942 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
943 | port->interrupt_out_size = buffer_size; | |
944 | port->interrupt_out_endpointAddress = endpoint->bEndpointAddress; | |
945 | port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
946 | if (!port->interrupt_out_buffer) { | |
947 | dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n"); | |
948 | goto probe_error; | |
949 | } | |
950 | usb_fill_int_urb (port->interrupt_out_urb, dev, | |
951 | usb_sndintpipe (dev, | |
952 | endpoint->bEndpointAddress), | |
953 | port->interrupt_out_buffer, buffer_size, | |
954 | serial->type->write_int_callback, port, | |
955 | endpoint->bInterval); | |
956 | } | |
957 | } else if (num_interrupt_out) { | |
958 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
959 | } | |
960 | ||
961 | /* if this device type has an attach function, call it */ | |
962 | if (type->attach) { | |
18fcac35 | 963 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
964 | dev_err(&interface->dev, "module get failed, exiting\n"); |
965 | goto probe_error; | |
966 | } | |
967 | retval = type->attach (serial); | |
18fcac35 | 968 | module_put(type->driver.owner); |
1da177e4 LT |
969 | if (retval < 0) |
970 | goto probe_error; | |
971 | if (retval > 0) { | |
972 | /* quietly accept this device, but don't bind to a serial port | |
973 | * as it's about to disappear */ | |
974 | goto exit; | |
975 | } | |
976 | } | |
977 | ||
34ef50e5 ON |
978 | if (get_free_serial (serial, num_ports, &minor) == NULL) { |
979 | dev_err(&interface->dev, "No more free serial devices\n"); | |
980 | goto probe_error; | |
981 | } | |
982 | ||
1da177e4 LT |
983 | /* register all of the individual ports with the driver core */ |
984 | for (i = 0; i < num_ports; ++i) { | |
985 | port = serial->port[i]; | |
986 | port->dev.parent = &interface->dev; | |
987 | port->dev.driver = NULL; | |
988 | port->dev.bus = &usb_serial_bus_type; | |
989 | port->dev.release = &port_release; | |
990 | ||
991 | snprintf (&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number); | |
992 | dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id); | |
13f4db9e GKH |
993 | retval = device_register(&port->dev); |
994 | if (retval) | |
995 | dev_err(&port->dev, "Error registering port device, " | |
996 | "continuing\n"); | |
1da177e4 LT |
997 | } |
998 | ||
999 | usb_serial_console_init (debug, minor); | |
1000 | ||
1001 | exit: | |
1002 | /* success */ | |
1003 | usb_set_intfdata (interface, serial); | |
1004 | return 0; | |
1005 | ||
1006 | probe_error: | |
1007 | for (i = 0; i < num_bulk_in; ++i) { | |
1008 | port = serial->port[i]; | |
1009 | if (!port) | |
1010 | continue; | |
95d43166 | 1011 | usb_free_urb(port->read_urb); |
1da177e4 LT |
1012 | kfree(port->bulk_in_buffer); |
1013 | } | |
1014 | for (i = 0; i < num_bulk_out; ++i) { | |
1015 | port = serial->port[i]; | |
1016 | if (!port) | |
1017 | continue; | |
95d43166 | 1018 | usb_free_urb(port->write_urb); |
1da177e4 LT |
1019 | kfree(port->bulk_out_buffer); |
1020 | } | |
1021 | for (i = 0; i < num_interrupt_in; ++i) { | |
1022 | port = serial->port[i]; | |
1023 | if (!port) | |
1024 | continue; | |
95d43166 | 1025 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 LT |
1026 | kfree(port->interrupt_in_buffer); |
1027 | } | |
1028 | for (i = 0; i < num_interrupt_out; ++i) { | |
1029 | port = serial->port[i]; | |
1030 | if (!port) | |
1031 | continue; | |
95d43166 | 1032 | usb_free_urb(port->interrupt_out_urb); |
1da177e4 LT |
1033 | kfree(port->interrupt_out_buffer); |
1034 | } | |
1035 | ||
1036 | /* return the minor range that this device had */ | |
1037 | return_serial (serial); | |
1038 | ||
1039 | /* free up any memory that we allocated */ | |
1040 | for (i = 0; i < serial->num_port_pointers; ++i) | |
1041 | kfree(serial->port[i]); | |
1042 | kfree (serial); | |
1043 | return -EIO; | |
1044 | } | |
1045 | ||
1046 | void usb_serial_disconnect(struct usb_interface *interface) | |
1047 | { | |
1048 | int i; | |
1049 | struct usb_serial *serial = usb_get_intfdata (interface); | |
1050 | struct device *dev = &interface->dev; | |
1051 | struct usb_serial_port *port; | |
1052 | ||
73e487fd | 1053 | usb_serial_console_disconnect(serial); |
1da177e4 LT |
1054 | dbg ("%s", __FUNCTION__); |
1055 | ||
1056 | usb_set_intfdata (interface, NULL); | |
1057 | if (serial) { | |
1058 | for (i = 0; i < serial->num_ports; ++i) { | |
1059 | port = serial->port[i]; | |
34ef50e5 ON |
1060 | if (port) { |
1061 | if (port->tty) | |
1062 | tty_hangup(port->tty); | |
1063 | kill_traffic(port); | |
1064 | } | |
1da177e4 LT |
1065 | } |
1066 | /* let the last holder of this object | |
1067 | * cause it to be cleaned up */ | |
73e487fd | 1068 | usb_serial_put(serial); |
1da177e4 LT |
1069 | } |
1070 | dev_info(dev, "device disconnected\n"); | |
1071 | } | |
1072 | ||
b68e31d0 | 1073 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1074 | .open = serial_open, |
1075 | .close = serial_close, | |
1076 | .write = serial_write, | |
1077 | .write_room = serial_write_room, | |
1078 | .ioctl = serial_ioctl, | |
1079 | .set_termios = serial_set_termios, | |
1080 | .throttle = serial_throttle, | |
1081 | .unthrottle = serial_unthrottle, | |
1082 | .break_ctl = serial_break, | |
1083 | .chars_in_buffer = serial_chars_in_buffer, | |
1084 | .read_proc = serial_read_proc, | |
1085 | .tiocmget = serial_tiocmget, | |
1086 | .tiocmset = serial_tiocmset, | |
1087 | }; | |
1088 | ||
1089 | struct tty_driver *usb_serial_tty_driver; | |
1090 | ||
1091 | static int __init usb_serial_init(void) | |
1092 | { | |
1093 | int i; | |
1094 | int result; | |
1095 | ||
1096 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1097 | if (!usb_serial_tty_driver) | |
1098 | return -ENOMEM; | |
1099 | ||
1100 | /* Initialize our global data */ | |
34ef50e5 | 1101 | spin_lock_init(&table_lock); |
1da177e4 LT |
1102 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
1103 | serial_table[i] = NULL; | |
1104 | } | |
1105 | ||
1106 | result = bus_register(&usb_serial_bus_type); | |
1107 | if (result) { | |
1108 | err("%s - registering bus driver failed", __FUNCTION__); | |
1109 | goto exit_bus; | |
1110 | } | |
1111 | ||
1da177e4 LT |
1112 | usb_serial_tty_driver->owner = THIS_MODULE; |
1113 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1114 | usb_serial_tty_driver->name = "ttyUSB"; |
1115 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1116 | usb_serial_tty_driver->minor_start = 0; | |
1117 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1118 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
331b8319 | 1119 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1120 | usb_serial_tty_driver->init_termios = tty_std_termios; |
1121 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1122 | tty_set_operations(usb_serial_tty_driver, &serial_ops); | |
1123 | result = tty_register_driver(usb_serial_tty_driver); | |
1124 | if (result) { | |
1125 | err("%s - tty_register_driver failed", __FUNCTION__); | |
1126 | goto exit_reg_driver; | |
1127 | } | |
1128 | ||
1129 | /* register the USB driver */ | |
1130 | result = usb_register(&usb_serial_driver); | |
1131 | if (result < 0) { | |
1132 | err("%s - usb_register failed", __FUNCTION__); | |
1133 | goto exit_tty; | |
1134 | } | |
1135 | ||
06299db3 GKH |
1136 | /* register the generic driver, if we should */ |
1137 | result = usb_serial_generic_register(debug); | |
1138 | if (result < 0) { | |
1139 | err("%s - registering generic driver failed", __FUNCTION__); | |
1140 | goto exit_generic; | |
1141 | } | |
1142 | ||
17a882fc | 1143 | info(DRIVER_DESC); |
1da177e4 LT |
1144 | |
1145 | return result; | |
1146 | ||
06299db3 GKH |
1147 | exit_generic: |
1148 | usb_deregister(&usb_serial_driver); | |
1149 | ||
1da177e4 LT |
1150 | exit_tty: |
1151 | tty_unregister_driver(usb_serial_tty_driver); | |
1152 | ||
1153 | exit_reg_driver: | |
1da177e4 LT |
1154 | bus_unregister(&usb_serial_bus_type); |
1155 | ||
1156 | exit_bus: | |
1157 | err ("%s - returning with error %d", __FUNCTION__, result); | |
1158 | put_tty_driver(usb_serial_tty_driver); | |
1159 | return result; | |
1160 | } | |
1161 | ||
1162 | ||
1163 | static void __exit usb_serial_exit(void) | |
1164 | { | |
1165 | usb_serial_console_exit(); | |
1166 | ||
1167 | usb_serial_generic_deregister(); | |
1168 | ||
1169 | usb_deregister(&usb_serial_driver); | |
1170 | tty_unregister_driver(usb_serial_tty_driver); | |
1171 | put_tty_driver(usb_serial_tty_driver); | |
1172 | bus_unregister(&usb_serial_bus_type); | |
1173 | } | |
1174 | ||
1175 | ||
1176 | module_init(usb_serial_init); | |
1177 | module_exit(usb_serial_exit); | |
1178 | ||
1179 | #define set_to_generic_if_null(type, function) \ | |
1180 | do { \ | |
1181 | if (!type->function) { \ | |
1182 | type->function = usb_serial_generic_##function; \ | |
1183 | dbg("Had to override the " #function \ | |
1184 | " usb serial operation with the generic one.");\ | |
1185 | } \ | |
1186 | } while (0) | |
1187 | ||
ea65370d | 1188 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1189 | { |
1190 | set_to_generic_if_null(device, open); | |
1191 | set_to_generic_if_null(device, write); | |
1192 | set_to_generic_if_null(device, close); | |
1193 | set_to_generic_if_null(device, write_room); | |
1194 | set_to_generic_if_null(device, chars_in_buffer); | |
1195 | set_to_generic_if_null(device, read_bulk_callback); | |
1196 | set_to_generic_if_null(device, write_bulk_callback); | |
1197 | set_to_generic_if_null(device, shutdown); | |
1198 | } | |
1199 | ||
4b10f0f3 | 1200 | int usb_serial_register(struct usb_serial_driver *driver) /* must be called with BKL held */ |
1da177e4 LT |
1201 | { |
1202 | int retval; | |
1203 | ||
ea65370d | 1204 | fixup_generic(driver); |
1da177e4 | 1205 | |
269bda1c GKH |
1206 | if (!driver->description) |
1207 | driver->description = driver->driver.name; | |
1208 | ||
1da177e4 | 1209 | /* Add this device to our list of devices */ |
ea65370d | 1210 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1211 | |
ea65370d | 1212 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1213 | if (retval) { |
269bda1c | 1214 | err("problem %d when registering driver %s", retval, driver->description); |
ea65370d | 1215 | list_del(&driver->driver_list); |
1da177e4 LT |
1216 | } |
1217 | else | |
269bda1c | 1218 | info("USB Serial support registered for %s", driver->description); |
1da177e4 LT |
1219 | |
1220 | return retval; | |
1221 | } | |
1222 | ||
1223 | ||
4b10f0f3 | 1224 | void usb_serial_deregister(struct usb_serial_driver *device) /* must be called with BKL held */ |
1da177e4 | 1225 | { |
269bda1c | 1226 | info("USB Serial deregistering driver %s", device->description); |
1da177e4 LT |
1227 | list_del(&device->driver_list); |
1228 | usb_serial_bus_deregister(device); | |
1229 | } | |
1230 | ||
1231 | ||
1232 | ||
1233 | /* If the usb-serial core is built into the core, the usb-serial drivers | |
1234 | need these symbols to load properly as modules. */ | |
1235 | EXPORT_SYMBOL_GPL(usb_serial_register); | |
1236 | EXPORT_SYMBOL_GPL(usb_serial_deregister); | |
1237 | EXPORT_SYMBOL_GPL(usb_serial_probe); | |
1238 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); | |
1239 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); | |
1240 | ||
1241 | ||
1242 | /* Module information */ | |
1243 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1244 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1da177e4 LT |
1245 | MODULE_LICENSE("GPL"); |
1246 | ||
1247 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1248 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |