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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * USB Serial Converter driver | |
3 | * | |
502b95c1 | 4 | * Copyright (C) 1999 - 2005 Greg Kroah-Hartman (greg@kroah.com) |
1da177e4 LT |
5 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
6 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
502b95c1 | 12 | * This driver was originally based on the ACM driver by Armin Fuerst (which was |
1da177e4 LT |
13 | * based on a driver by Brad Keryan) |
14 | * | |
15 | * See Documentation/usb/usb-serial.txt for more information on using this driver | |
16 | * | |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/errno.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/tty.h> | |
24 | #include <linux/tty_driver.h> | |
25 | #include <linux/tty_flip.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <linux/spinlock.h> | |
1ce7dd26 | 29 | #include <linux/mutex.h> |
1da177e4 | 30 | #include <linux/list.h> |
1da177e4 LT |
31 | #include <asm/uaccess.h> |
32 | #include <linux/usb.h> | |
a969888c | 33 | #include <linux/usb/serial.h> |
1da177e4 LT |
34 | #include "pl2303.h" |
35 | ||
36 | /* | |
37 | * Version Information | |
38 | */ | |
1da177e4 LT |
39 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
40 | #define DRIVER_DESC "USB Serial Driver core" | |
41 | ||
34f8e761 PZ |
42 | static void port_free(struct usb_serial_port *port); |
43 | ||
1da177e4 LT |
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 */ | |
34ef50e5 | 61 | static spinlock_t table_lock; |
1da177e4 LT |
62 | static LIST_HEAD(usb_serial_driver_list); |
63 | ||
64 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
65 | { | |
34ef50e5 ON |
66 | struct usb_serial *serial; |
67 | ||
68 | spin_lock(&table_lock); | |
69 | serial = serial_table[index]; | |
1da177e4 LT |
70 | |
71 | if (serial) | |
72 | kref_get(&serial->kref); | |
34ef50e5 | 73 | spin_unlock(&table_lock); |
1da177e4 LT |
74 | return serial; |
75 | } | |
76 | ||
77 | static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor) | |
78 | { | |
79 | unsigned int i, j; | |
80 | int good_spot; | |
81 | ||
82 | dbg("%s %d", __FUNCTION__, num_ports); | |
83 | ||
84 | *minor = 0; | |
34ef50e5 | 85 | spin_lock(&table_lock); |
1da177e4 LT |
86 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
87 | if (serial_table[i]) | |
88 | continue; | |
89 | ||
90 | good_spot = 1; | |
91 | for (j = 1; j <= num_ports-1; ++j) | |
92 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
93 | good_spot = 0; | |
94 | i += j; | |
95 | break; | |
96 | } | |
97 | if (good_spot == 0) | |
98 | continue; | |
99 | ||
100 | *minor = i; | |
a1f721c8 | 101 | j = 0; |
1da177e4 | 102 | dbg("%s - minor base = %d", __FUNCTION__, *minor); |
a1f721c8 | 103 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 104 | serial_table[i] = serial; |
a1f721c8 ON |
105 | serial->port[j++]->number = i; |
106 | } | |
34ef50e5 | 107 | spin_unlock(&table_lock); |
1da177e4 LT |
108 | return serial; |
109 | } | |
34ef50e5 | 110 | spin_unlock(&table_lock); |
1da177e4 LT |
111 | return NULL; |
112 | } | |
113 | ||
114 | static void return_serial(struct usb_serial *serial) | |
115 | { | |
116 | int i; | |
117 | ||
118 | dbg("%s", __FUNCTION__); | |
119 | ||
120 | if (serial == NULL) | |
121 | return; | |
122 | ||
34ef50e5 | 123 | spin_lock(&table_lock); |
1da177e4 LT |
124 | for (i = 0; i < serial->num_ports; ++i) { |
125 | serial_table[serial->minor + i] = NULL; | |
126 | } | |
34ef50e5 | 127 | spin_unlock(&table_lock); |
1da177e4 LT |
128 | } |
129 | ||
130 | static void destroy_serial(struct kref *kref) | |
131 | { | |
132 | struct usb_serial *serial; | |
133 | struct usb_serial_port *port; | |
134 | int i; | |
135 | ||
136 | serial = to_usb_serial(kref); | |
137 | ||
269bda1c | 138 | dbg("%s - %s", __FUNCTION__, serial->type->description); |
1da177e4 | 139 | |
521b85ae JR |
140 | serial->type->shutdown(serial); |
141 | ||
142 | /* return the minor range that this device had */ | |
143 | return_serial(serial); | |
144 | ||
1da177e4 LT |
145 | for (i = 0; i < serial->num_ports; ++i) |
146 | serial->port[i]->open_count = 0; | |
147 | ||
148 | /* the ports are cleaned up and released in port_release() */ | |
149 | for (i = 0; i < serial->num_ports; ++i) | |
150 | if (serial->port[i]->dev.parent != NULL) { | |
151 | device_unregister(&serial->port[i]->dev); | |
152 | serial->port[i] = NULL; | |
153 | } | |
154 | ||
155 | /* If this is a "fake" port, we have to clean it up here, as it will | |
156 | * not get cleaned up in port_release() as it was never registered with | |
157 | * the driver core */ | |
158 | if (serial->num_ports < serial->num_port_pointers) { | |
159 | for (i = serial->num_ports; i < serial->num_port_pointers; ++i) { | |
160 | port = serial->port[i]; | |
161 | if (!port) | |
162 | continue; | |
34f8e761 | 163 | port_free(port); |
1da177e4 LT |
164 | } |
165 | } | |
166 | ||
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; |
3ff4fd94 | 286 | int retval = -ENODEV; |
1da177e4 | 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) { | |
3ff4fd94 | 294 | retval = -EINVAL; |
1da177e4 LT |
295 | dbg("%s - port not opened", __FUNCTION__); |
296 | goto exit; | |
297 | } | |
298 | ||
299 | /* pass on to the driver specific version of this function */ | |
300 | retval = port->serial->type->write(port, buf, count); | |
301 | ||
302 | exit: | |
303 | return retval; | |
304 | } | |
305 | ||
306 | static int serial_write_room (struct tty_struct *tty) | |
307 | { | |
81671ddb | 308 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 309 | int retval = -ENODEV; |
1da177e4 | 310 | |
487f9c67 LFC |
311 | if (!port) |
312 | goto exit; | |
313 | ||
1da177e4 LT |
314 | dbg("%s - port %d", __FUNCTION__, port->number); |
315 | ||
316 | if (!port->open_count) { | |
317 | dbg("%s - port not open", __FUNCTION__); | |
318 | goto exit; | |
319 | } | |
320 | ||
321 | /* pass on to the driver specific version of this function */ | |
322 | retval = port->serial->type->write_room(port); | |
323 | ||
324 | exit: | |
325 | return retval; | |
326 | } | |
327 | ||
328 | static int serial_chars_in_buffer (struct tty_struct *tty) | |
329 | { | |
81671ddb | 330 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 331 | int retval = -ENODEV; |
1da177e4 | 332 | |
487f9c67 LFC |
333 | if (!port) |
334 | goto exit; | |
335 | ||
1da177e4 LT |
336 | dbg("%s = port %d", __FUNCTION__, port->number); |
337 | ||
338 | if (!port->open_count) { | |
339 | dbg("%s - port not open", __FUNCTION__); | |
340 | goto exit; | |
341 | } | |
342 | ||
343 | /* pass on to the driver specific version of this function */ | |
344 | retval = port->serial->type->chars_in_buffer(port); | |
345 | ||
346 | exit: | |
347 | return retval; | |
348 | } | |
349 | ||
350 | static void serial_throttle (struct tty_struct * tty) | |
351 | { | |
81671ddb | 352 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 353 | |
487f9c67 LFC |
354 | if (!port) |
355 | return; | |
356 | ||
1da177e4 LT |
357 | dbg("%s - port %d", __FUNCTION__, port->number); |
358 | ||
359 | if (!port->open_count) { | |
360 | dbg ("%s - port not open", __FUNCTION__); | |
361 | return; | |
362 | } | |
363 | ||
364 | /* pass on to the driver specific version of this function */ | |
365 | if (port->serial->type->throttle) | |
366 | port->serial->type->throttle(port); | |
367 | } | |
368 | ||
369 | static void serial_unthrottle (struct tty_struct * tty) | |
370 | { | |
81671ddb | 371 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 372 | |
487f9c67 LFC |
373 | if (!port) |
374 | return; | |
375 | ||
1da177e4 LT |
376 | dbg("%s - port %d", __FUNCTION__, port->number); |
377 | ||
378 | if (!port->open_count) { | |
379 | dbg("%s - port not open", __FUNCTION__); | |
380 | return; | |
381 | } | |
382 | ||
383 | /* pass on to the driver specific version of this function */ | |
384 | if (port->serial->type->unthrottle) | |
385 | port->serial->type->unthrottle(port); | |
386 | } | |
387 | ||
388 | static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) | |
389 | { | |
81671ddb | 390 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
391 | int retval = -ENODEV; |
392 | ||
487f9c67 LFC |
393 | if (!port) |
394 | goto exit; | |
395 | ||
1da177e4 LT |
396 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); |
397 | ||
398 | if (!port->open_count) { | |
399 | dbg ("%s - port not open", __FUNCTION__); | |
400 | goto exit; | |
401 | } | |
402 | ||
403 | /* pass on to the driver specific version of this function if it is available */ | |
404 | if (port->serial->type->ioctl) | |
405 | retval = port->serial->type->ioctl(port, file, cmd, arg); | |
406 | else | |
407 | retval = -ENOIOCTLCMD; | |
408 | ||
409 | exit: | |
410 | return retval; | |
411 | } | |
412 | ||
606d099c | 413 | static void serial_set_termios (struct tty_struct *tty, struct ktermios * old) |
1da177e4 | 414 | { |
81671ddb | 415 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 416 | |
487f9c67 LFC |
417 | if (!port) |
418 | return; | |
419 | ||
1da177e4 LT |
420 | dbg("%s - port %d", __FUNCTION__, port->number); |
421 | ||
422 | if (!port->open_count) { | |
423 | dbg("%s - port not open", __FUNCTION__); | |
424 | return; | |
425 | } | |
426 | ||
427 | /* pass on to the driver specific version of this function if it is available */ | |
428 | if (port->serial->type->set_termios) | |
429 | port->serial->type->set_termios(port, old); | |
430 | } | |
431 | ||
432 | static void serial_break (struct tty_struct *tty, int break_state) | |
433 | { | |
81671ddb | 434 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 435 | |
487f9c67 LFC |
436 | if (!port) |
437 | return; | |
438 | ||
1da177e4 LT |
439 | dbg("%s - port %d", __FUNCTION__, port->number); |
440 | ||
441 | if (!port->open_count) { | |
442 | dbg("%s - port not open", __FUNCTION__); | |
443 | return; | |
444 | } | |
445 | ||
446 | /* pass on to the driver specific version of this function if it is available */ | |
447 | if (port->serial->type->break_ctl) | |
448 | port->serial->type->break_ctl(port, break_state); | |
449 | } | |
450 | ||
451 | static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) | |
452 | { | |
453 | struct usb_serial *serial; | |
454 | int length = 0; | |
455 | int i; | |
456 | off_t begin = 0; | |
457 | char tmp[40]; | |
458 | ||
459 | dbg("%s", __FUNCTION__); | |
17a882fc | 460 | length += sprintf (page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
461 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
462 | serial = usb_serial_get_by_index(i); | |
463 | if (serial == NULL) | |
464 | continue; | |
465 | ||
466 | length += sprintf (page+length, "%d:", i); | |
18fcac35 GKH |
467 | if (serial->type->driver.owner) |
468 | length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner)); | |
269bda1c | 469 | length += sprintf (page+length, " name:\"%s\"", serial->type->description); |
1da177e4 LT |
470 | length += sprintf (page+length, " vendor:%04x product:%04x", |
471 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
472 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
473 | length += sprintf (page+length, " num_ports:%d", serial->num_ports); | |
474 | length += sprintf (page+length, " port:%d", i - serial->minor + 1); | |
475 | ||
476 | usb_make_path(serial->dev, tmp, sizeof(tmp)); | |
477 | length += sprintf (page+length, " path:%s", tmp); | |
478 | ||
479 | length += sprintf (page+length, "\n"); | |
59925838 MU |
480 | if ((length + begin) > (off + count)) { |
481 | usb_serial_put(serial); | |
1da177e4 | 482 | goto done; |
59925838 | 483 | } |
1da177e4 LT |
484 | if ((length + begin) < off) { |
485 | begin += length; | |
486 | length = 0; | |
487 | } | |
73e487fd | 488 | usb_serial_put(serial); |
1da177e4 LT |
489 | } |
490 | *eof = 1; | |
491 | done: | |
492 | if (off >= (length + begin)) | |
493 | return 0; | |
494 | *start = page + (off-begin); | |
495 | return ((count < begin+length-off) ? count : begin+length-off); | |
496 | } | |
497 | ||
498 | static int serial_tiocmget (struct tty_struct *tty, struct file *file) | |
499 | { | |
81671ddb | 500 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 501 | |
487f9c67 | 502 | if (!port) |
db54a53d | 503 | return -ENODEV; |
487f9c67 | 504 | |
1da177e4 LT |
505 | dbg("%s - port %d", __FUNCTION__, port->number); |
506 | ||
507 | if (!port->open_count) { | |
508 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 509 | return -ENODEV; |
1da177e4 LT |
510 | } |
511 | ||
512 | if (port->serial->type->tiocmget) | |
513 | return port->serial->type->tiocmget(port, file); | |
514 | ||
1da177e4 LT |
515 | return -EINVAL; |
516 | } | |
517 | ||
518 | static int serial_tiocmset (struct tty_struct *tty, struct file *file, | |
519 | unsigned int set, unsigned int clear) | |
520 | { | |
81671ddb | 521 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 522 | |
487f9c67 | 523 | if (!port) |
db54a53d | 524 | return -ENODEV; |
487f9c67 | 525 | |
1da177e4 LT |
526 | dbg("%s - port %d", __FUNCTION__, port->number); |
527 | ||
528 | if (!port->open_count) { | |
529 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 530 | return -ENODEV; |
1da177e4 LT |
531 | } |
532 | ||
533 | if (port->serial->type->tiocmset) | |
534 | return port->serial->type->tiocmset(port, file, set, clear); | |
535 | ||
1da177e4 LT |
536 | return -EINVAL; |
537 | } | |
538 | ||
cf2c7481 PZ |
539 | /* |
540 | * We would be calling tty_wakeup here, but unfortunately some line | |
541 | * disciplines have an annoying habit of calling tty->write from | |
542 | * the write wakeup callback (e.g. n_hdlc.c). | |
543 | */ | |
544 | void usb_serial_port_softint(struct usb_serial_port *port) | |
545 | { | |
546 | schedule_work(&port->work); | |
547 | } | |
548 | ||
c4028958 | 549 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 550 | { |
c4028958 DH |
551 | struct usb_serial_port *port = |
552 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
553 | struct tty_struct *tty; |
554 | ||
555 | dbg("%s - port %d", __FUNCTION__, port->number); | |
556 | ||
557 | if (!port) | |
558 | return; | |
559 | ||
560 | tty = port->tty; | |
561 | if (!tty) | |
562 | return; | |
563 | ||
564 | tty_wakeup(tty); | |
565 | } | |
566 | ||
567 | static void port_release(struct device *dev) | |
568 | { | |
569 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
570 | ||
571 | dbg ("%s - %s", __FUNCTION__, dev->bus_id); | |
34f8e761 PZ |
572 | port_free(port); |
573 | } | |
574 | ||
34ef50e5 | 575 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 576 | { |
1da177e4 | 577 | usb_kill_urb(port->read_urb); |
1da177e4 | 578 | usb_kill_urb(port->write_urb); |
1da177e4 | 579 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 580 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
581 | } |
582 | ||
583 | static void port_free(struct usb_serial_port *port) | |
584 | { | |
585 | kill_traffic(port); | |
586 | usb_free_urb(port->read_urb); | |
587 | usb_free_urb(port->write_urb); | |
588 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 LT |
589 | usb_free_urb(port->interrupt_out_urb); |
590 | kfree(port->bulk_in_buffer); | |
591 | kfree(port->bulk_out_buffer); | |
592 | kfree(port->interrupt_in_buffer); | |
593 | kfree(port->interrupt_out_buffer); | |
34f8e761 | 594 | flush_scheduled_work(); /* port->work */ |
1da177e4 LT |
595 | kfree(port); |
596 | } | |
597 | ||
598 | static struct usb_serial * create_serial (struct usb_device *dev, | |
599 | struct usb_interface *interface, | |
ea65370d | 600 | struct usb_serial_driver *driver) |
1da177e4 LT |
601 | { |
602 | struct usb_serial *serial; | |
603 | ||
80b6ca48 | 604 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 LT |
605 | if (!serial) { |
606 | dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); | |
607 | return NULL; | |
608 | } | |
1da177e4 | 609 | serial->dev = usb_get_dev(dev); |
ea65370d | 610 | serial->type = driver; |
1da177e4 LT |
611 | serial->interface = interface; |
612 | kref_init(&serial->kref); | |
613 | ||
614 | return serial; | |
615 | } | |
616 | ||
93bacefc GKH |
617 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
618 | struct usb_serial_driver *drv) | |
619 | { | |
620 | struct usb_dynid *dynid; | |
621 | ||
622 | spin_lock(&drv->dynids.lock); | |
623 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
624 | if (usb_match_one_id(intf, &dynid->id)) { | |
625 | spin_unlock(&drv->dynids.lock); | |
626 | return &dynid->id; | |
627 | } | |
628 | } | |
629 | spin_unlock(&drv->dynids.lock); | |
630 | return NULL; | |
631 | } | |
632 | ||
633 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
634 | struct usb_interface *intf) | |
635 | { | |
636 | const struct usb_device_id *id; | |
637 | ||
638 | id = usb_match_id(intf, drv->id_table); | |
639 | if (id) { | |
640 | dbg("static descriptor matches"); | |
641 | goto exit; | |
642 | } | |
643 | id = match_dynamic_id(intf, drv); | |
644 | if (id) | |
645 | dbg("dynamic descriptor matches"); | |
646 | exit: | |
647 | return id; | |
648 | } | |
649 | ||
ea65370d | 650 | static struct usb_serial_driver *search_serial_device(struct usb_interface *iface) |
1da177e4 LT |
651 | { |
652 | struct list_head *p; | |
653 | const struct usb_device_id *id; | |
ea65370d | 654 | struct usb_serial_driver *t; |
1da177e4 | 655 | |
93b1fae4 | 656 | /* Check if the usb id matches a known device */ |
1da177e4 | 657 | list_for_each(p, &usb_serial_driver_list) { |
ea65370d | 658 | t = list_entry(p, struct usb_serial_driver, driver_list); |
93bacefc GKH |
659 | id = get_iface_id(t, iface); |
660 | if (id) | |
1da177e4 | 661 | return t; |
1da177e4 LT |
662 | } |
663 | ||
664 | return NULL; | |
665 | } | |
666 | ||
667 | int usb_serial_probe(struct usb_interface *interface, | |
668 | const struct usb_device_id *id) | |
669 | { | |
670 | struct usb_device *dev = interface_to_usbdev (interface); | |
671 | struct usb_serial *serial = NULL; | |
672 | struct usb_serial_port *port; | |
673 | struct usb_host_interface *iface_desc; | |
674 | struct usb_endpoint_descriptor *endpoint; | |
675 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
676 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
677 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
678 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 679 | struct usb_serial_driver *type = NULL; |
1da177e4 LT |
680 | int retval; |
681 | int minor; | |
682 | int buffer_size; | |
683 | int i; | |
684 | int num_interrupt_in = 0; | |
685 | int num_interrupt_out = 0; | |
686 | int num_bulk_in = 0; | |
687 | int num_bulk_out = 0; | |
688 | int num_ports = 0; | |
689 | int max_endpoints; | |
690 | ||
4b10f0f3 | 691 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
692 | type = search_serial_device(interface); |
693 | if (!type) { | |
4b10f0f3 | 694 | unlock_kernel(); |
1da177e4 LT |
695 | dbg("none matched"); |
696 | return -ENODEV; | |
697 | } | |
698 | ||
699 | serial = create_serial (dev, interface, type); | |
700 | if (!serial) { | |
4b10f0f3 | 701 | unlock_kernel(); |
1da177e4 LT |
702 | dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); |
703 | return -ENOMEM; | |
704 | } | |
705 | ||
706 | /* if this device type has a probe function, call it */ | |
707 | if (type->probe) { | |
708 | const struct usb_device_id *id; | |
709 | ||
18fcac35 | 710 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 711 | unlock_kernel(); |
1da177e4 LT |
712 | dev_err(&interface->dev, "module get failed, exiting\n"); |
713 | kfree (serial); | |
714 | return -EIO; | |
715 | } | |
716 | ||
93bacefc | 717 | id = get_iface_id(type, interface); |
1da177e4 | 718 | retval = type->probe(serial, id); |
18fcac35 | 719 | module_put(type->driver.owner); |
1da177e4 LT |
720 | |
721 | if (retval) { | |
4b10f0f3 | 722 | unlock_kernel(); |
1da177e4 LT |
723 | dbg ("sub driver rejected device"); |
724 | kfree (serial); | |
725 | return retval; | |
726 | } | |
727 | } | |
728 | ||
729 | /* descriptor matches, let's find the endpoints needed */ | |
730 | /* check out the endpoints */ | |
731 | iface_desc = interface->cur_altsetting; | |
732 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
733 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
734 | |
735 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
736 | /* we found a bulk in endpoint */ |
737 | dbg("found bulk in on endpoint %d", i); | |
738 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
739 | ++num_bulk_in; | |
740 | } | |
741 | ||
4fa1bbf5 | 742 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
743 | /* we found a bulk out endpoint */ |
744 | dbg("found bulk out on endpoint %d", i); | |
745 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
746 | ++num_bulk_out; | |
747 | } | |
4fa1bbf5 LFC |
748 | |
749 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
750 | /* we found a interrupt in endpoint */ |
751 | dbg("found interrupt in on endpoint %d", i); | |
752 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
753 | ++num_interrupt_in; | |
754 | } | |
755 | ||
4fa1bbf5 | 756 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
757 | /* we found an interrupt out endpoint */ |
758 | dbg("found interrupt out on endpoint %d", i); | |
759 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
760 | ++num_interrupt_out; | |
761 | } | |
762 | } | |
763 | ||
764 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
765 | /* BEGIN HORRIBLE HACK FOR PL2303 */ | |
766 | /* this is needed due to the looney way its endpoints are set up */ | |
767 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
768 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
769 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
770 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
771 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
772 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID))) { | |
1da177e4 LT |
773 | if (interface != dev->actconfig->interface[0]) { |
774 | /* check out the endpoints of the other interface*/ | |
775 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
776 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
777 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 778 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
779 | /* we found a interrupt in endpoint */ |
780 | dbg("found interrupt in for Prolific device on separate interface"); | |
781 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
782 | ++num_interrupt_in; | |
783 | } | |
784 | } | |
785 | } | |
786 | ||
787 | /* Now make sure the PL-2303 is configured correctly. | |
788 | * If not, give up now and hope this hack will work | |
789 | * properly during a later invocation of usb_serial_probe | |
790 | */ | |
791 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
4b10f0f3 | 792 | unlock_kernel(); |
1da177e4 LT |
793 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
794 | kfree (serial); | |
795 | return -ENODEV; | |
796 | } | |
797 | } | |
798 | /* END HORRIBLE HACK FOR PL2303 */ | |
799 | #endif | |
800 | ||
801 | /* found all that we need */ | |
269bda1c | 802 | dev_info(&interface->dev, "%s converter detected\n", type->description); |
1da177e4 LT |
803 | |
804 | #ifdef CONFIG_USB_SERIAL_GENERIC | |
805 | if (type == &usb_serial_generic_device) { | |
806 | num_ports = num_bulk_out; | |
807 | if (num_ports == 0) { | |
4b10f0f3 | 808 | unlock_kernel(); |
1da177e4 LT |
809 | dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n"); |
810 | kfree (serial); | |
811 | return -EIO; | |
812 | } | |
813 | } | |
814 | #endif | |
815 | if (!num_ports) { | |
816 | /* if this device type has a calc_num_ports function, call it */ | |
817 | if (type->calc_num_ports) { | |
18fcac35 | 818 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 819 | unlock_kernel(); |
1da177e4 LT |
820 | dev_err(&interface->dev, "module get failed, exiting\n"); |
821 | kfree (serial); | |
822 | return -EIO; | |
823 | } | |
824 | num_ports = type->calc_num_ports (serial); | |
18fcac35 | 825 | module_put(type->driver.owner); |
1da177e4 LT |
826 | } |
827 | if (!num_ports) | |
828 | num_ports = type->num_ports; | |
829 | } | |
830 | ||
1da177e4 LT |
831 | serial->num_ports = num_ports; |
832 | serial->num_bulk_in = num_bulk_in; | |
833 | serial->num_bulk_out = num_bulk_out; | |
834 | serial->num_interrupt_in = num_interrupt_in; | |
835 | serial->num_interrupt_out = num_interrupt_out; | |
836 | ||
837 | /* create our ports, we need as many as the max endpoints */ | |
838 | /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */ | |
839 | max_endpoints = max(num_bulk_in, num_bulk_out); | |
840 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
841 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
842 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
843 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
844 | unlock_kernel(); |
845 | ||
1da177e4 LT |
846 | dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints); |
847 | for (i = 0; i < max_endpoints; ++i) { | |
80b6ca48 | 848 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
849 | if (!port) |
850 | goto probe_error; | |
1da177e4 | 851 | port->serial = serial; |
507ca9bc | 852 | spin_lock_init(&port->lock); |
1ce7dd26 | 853 | mutex_init(&port->mutex); |
c4028958 | 854 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
855 | serial->port[i] = port; |
856 | } | |
857 | ||
858 | /* set up the endpoint information */ | |
859 | for (i = 0; i < num_bulk_in; ++i) { | |
860 | endpoint = bulk_in_endpoint[i]; | |
861 | port = serial->port[i]; | |
862 | port->read_urb = usb_alloc_urb (0, GFP_KERNEL); | |
863 | if (!port->read_urb) { | |
864 | dev_err(&interface->dev, "No free urbs available\n"); | |
865 | goto probe_error; | |
866 | } | |
867 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
868 | port->bulk_in_size = buffer_size; | |
869 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
870 | port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
871 | if (!port->bulk_in_buffer) { | |
872 | dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n"); | |
873 | goto probe_error; | |
874 | } | |
875 | usb_fill_bulk_urb (port->read_urb, dev, | |
876 | usb_rcvbulkpipe (dev, | |
877 | endpoint->bEndpointAddress), | |
878 | port->bulk_in_buffer, buffer_size, | |
879 | serial->type->read_bulk_callback, | |
880 | port); | |
881 | } | |
882 | ||
883 | for (i = 0; i < num_bulk_out; ++i) { | |
884 | endpoint = bulk_out_endpoint[i]; | |
885 | port = serial->port[i]; | |
886 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
887 | if (!port->write_urb) { | |
888 | dev_err(&interface->dev, "No free urbs available\n"); | |
889 | goto probe_error; | |
890 | } | |
891 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
892 | port->bulk_out_size = buffer_size; | |
893 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
894 | port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
895 | if (!port->bulk_out_buffer) { | |
896 | dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n"); | |
897 | goto probe_error; | |
898 | } | |
899 | usb_fill_bulk_urb (port->write_urb, dev, | |
900 | usb_sndbulkpipe (dev, | |
901 | endpoint->bEndpointAddress), | |
902 | port->bulk_out_buffer, buffer_size, | |
903 | serial->type->write_bulk_callback, | |
904 | port); | |
905 | } | |
906 | ||
907 | if (serial->type->read_int_callback) { | |
908 | for (i = 0; i < num_interrupt_in; ++i) { | |
909 | endpoint = interrupt_in_endpoint[i]; | |
910 | port = serial->port[i]; | |
911 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
912 | if (!port->interrupt_in_urb) { | |
913 | dev_err(&interface->dev, "No free urbs available\n"); | |
914 | goto probe_error; | |
915 | } | |
916 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
917 | port->interrupt_in_endpointAddress = endpoint->bEndpointAddress; | |
918 | port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
919 | if (!port->interrupt_in_buffer) { | |
920 | dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n"); | |
921 | goto probe_error; | |
922 | } | |
923 | usb_fill_int_urb (port->interrupt_in_urb, dev, | |
924 | usb_rcvintpipe (dev, | |
925 | endpoint->bEndpointAddress), | |
926 | port->interrupt_in_buffer, buffer_size, | |
927 | serial->type->read_int_callback, port, | |
928 | endpoint->bInterval); | |
929 | } | |
930 | } else if (num_interrupt_in) { | |
931 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
932 | } | |
933 | ||
934 | if (serial->type->write_int_callback) { | |
935 | for (i = 0; i < num_interrupt_out; ++i) { | |
936 | endpoint = interrupt_out_endpoint[i]; | |
937 | port = serial->port[i]; | |
938 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
939 | if (!port->interrupt_out_urb) { | |
940 | dev_err(&interface->dev, "No free urbs available\n"); | |
941 | goto probe_error; | |
942 | } | |
943 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
944 | port->interrupt_out_size = buffer_size; | |
945 | port->interrupt_out_endpointAddress = endpoint->bEndpointAddress; | |
946 | port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
947 | if (!port->interrupt_out_buffer) { | |
948 | dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n"); | |
949 | goto probe_error; | |
950 | } | |
951 | usb_fill_int_urb (port->interrupt_out_urb, dev, | |
952 | usb_sndintpipe (dev, | |
953 | endpoint->bEndpointAddress), | |
954 | port->interrupt_out_buffer, buffer_size, | |
955 | serial->type->write_int_callback, port, | |
956 | endpoint->bInterval); | |
957 | } | |
958 | } else if (num_interrupt_out) { | |
959 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
960 | } | |
961 | ||
962 | /* if this device type has an attach function, call it */ | |
963 | if (type->attach) { | |
18fcac35 | 964 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
965 | dev_err(&interface->dev, "module get failed, exiting\n"); |
966 | goto probe_error; | |
967 | } | |
968 | retval = type->attach (serial); | |
18fcac35 | 969 | module_put(type->driver.owner); |
1da177e4 LT |
970 | if (retval < 0) |
971 | goto probe_error; | |
972 | if (retval > 0) { | |
973 | /* quietly accept this device, but don't bind to a serial port | |
974 | * as it's about to disappear */ | |
975 | goto exit; | |
976 | } | |
977 | } | |
978 | ||
34ef50e5 ON |
979 | if (get_free_serial (serial, num_ports, &minor) == NULL) { |
980 | dev_err(&interface->dev, "No more free serial devices\n"); | |
981 | goto probe_error; | |
982 | } | |
c744f99e | 983 | serial->minor = minor; |
34ef50e5 | 984 | |
1da177e4 LT |
985 | /* register all of the individual ports with the driver core */ |
986 | for (i = 0; i < num_ports; ++i) { | |
987 | port = serial->port[i]; | |
988 | port->dev.parent = &interface->dev; | |
989 | port->dev.driver = NULL; | |
990 | port->dev.bus = &usb_serial_bus_type; | |
991 | port->dev.release = &port_release; | |
992 | ||
993 | snprintf (&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number); | |
994 | dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id); | |
13f4db9e GKH |
995 | retval = device_register(&port->dev); |
996 | if (retval) | |
997 | dev_err(&port->dev, "Error registering port device, " | |
998 | "continuing\n"); | |
1da177e4 LT |
999 | } |
1000 | ||
1001 | usb_serial_console_init (debug, minor); | |
1002 | ||
1003 | exit: | |
1004 | /* success */ | |
1005 | usb_set_intfdata (interface, serial); | |
1006 | return 0; | |
1007 | ||
1008 | probe_error: | |
1009 | for (i = 0; i < num_bulk_in; ++i) { | |
1010 | port = serial->port[i]; | |
1011 | if (!port) | |
1012 | continue; | |
95d43166 | 1013 | usb_free_urb(port->read_urb); |
1da177e4 LT |
1014 | kfree(port->bulk_in_buffer); |
1015 | } | |
1016 | for (i = 0; i < num_bulk_out; ++i) { | |
1017 | port = serial->port[i]; | |
1018 | if (!port) | |
1019 | continue; | |
95d43166 | 1020 | usb_free_urb(port->write_urb); |
1da177e4 LT |
1021 | kfree(port->bulk_out_buffer); |
1022 | } | |
1023 | for (i = 0; i < num_interrupt_in; ++i) { | |
1024 | port = serial->port[i]; | |
1025 | if (!port) | |
1026 | continue; | |
95d43166 | 1027 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 LT |
1028 | kfree(port->interrupt_in_buffer); |
1029 | } | |
1030 | for (i = 0; i < num_interrupt_out; ++i) { | |
1031 | port = serial->port[i]; | |
1032 | if (!port) | |
1033 | continue; | |
95d43166 | 1034 | usb_free_urb(port->interrupt_out_urb); |
1da177e4 LT |
1035 | kfree(port->interrupt_out_buffer); |
1036 | } | |
1037 | ||
1da177e4 LT |
1038 | /* free up any memory that we allocated */ |
1039 | for (i = 0; i < serial->num_port_pointers; ++i) | |
1040 | kfree(serial->port[i]); | |
1041 | kfree (serial); | |
1042 | return -EIO; | |
1043 | } | |
1044 | ||
1045 | void usb_serial_disconnect(struct usb_interface *interface) | |
1046 | { | |
1047 | int i; | |
1048 | struct usb_serial *serial = usb_get_intfdata (interface); | |
1049 | struct device *dev = &interface->dev; | |
1050 | struct usb_serial_port *port; | |
1051 | ||
73e487fd | 1052 | usb_serial_console_disconnect(serial); |
1da177e4 LT |
1053 | dbg ("%s", __FUNCTION__); |
1054 | ||
1055 | usb_set_intfdata (interface, NULL); | |
1056 | if (serial) { | |
1057 | for (i = 0; i < serial->num_ports; ++i) { | |
1058 | port = serial->port[i]; | |
34ef50e5 ON |
1059 | if (port) { |
1060 | if (port->tty) | |
1061 | tty_hangup(port->tty); | |
1062 | kill_traffic(port); | |
1063 | } | |
1da177e4 LT |
1064 | } |
1065 | /* let the last holder of this object | |
1066 | * cause it to be cleaned up */ | |
73e487fd | 1067 | usb_serial_put(serial); |
1da177e4 LT |
1068 | } |
1069 | dev_info(dev, "device disconnected\n"); | |
1070 | } | |
1071 | ||
b68e31d0 | 1072 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1073 | .open = serial_open, |
1074 | .close = serial_close, | |
1075 | .write = serial_write, | |
1076 | .write_room = serial_write_room, | |
1077 | .ioctl = serial_ioctl, | |
1078 | .set_termios = serial_set_termios, | |
1079 | .throttle = serial_throttle, | |
1080 | .unthrottle = serial_unthrottle, | |
1081 | .break_ctl = serial_break, | |
1082 | .chars_in_buffer = serial_chars_in_buffer, | |
1083 | .read_proc = serial_read_proc, | |
1084 | .tiocmget = serial_tiocmget, | |
1085 | .tiocmset = serial_tiocmset, | |
1086 | }; | |
1087 | ||
1088 | struct tty_driver *usb_serial_tty_driver; | |
1089 | ||
1090 | static int __init usb_serial_init(void) | |
1091 | { | |
1092 | int i; | |
1093 | int result; | |
1094 | ||
1095 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1096 | if (!usb_serial_tty_driver) | |
1097 | return -ENOMEM; | |
1098 | ||
1099 | /* Initialize our global data */ | |
34ef50e5 | 1100 | spin_lock_init(&table_lock); |
1da177e4 LT |
1101 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
1102 | serial_table[i] = NULL; | |
1103 | } | |
1104 | ||
1105 | result = bus_register(&usb_serial_bus_type); | |
1106 | if (result) { | |
1107 | err("%s - registering bus driver failed", __FUNCTION__); | |
1108 | goto exit_bus; | |
1109 | } | |
1110 | ||
1da177e4 LT |
1111 | usb_serial_tty_driver->owner = THIS_MODULE; |
1112 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1113 | usb_serial_tty_driver->name = "ttyUSB"; |
1114 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1115 | usb_serial_tty_driver->minor_start = 0; | |
1116 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1117 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
331b8319 | 1118 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1119 | usb_serial_tty_driver->init_termios = tty_std_termios; |
1120 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1121 | tty_set_operations(usb_serial_tty_driver, &serial_ops); | |
1122 | result = tty_register_driver(usb_serial_tty_driver); | |
1123 | if (result) { | |
1124 | err("%s - tty_register_driver failed", __FUNCTION__); | |
1125 | goto exit_reg_driver; | |
1126 | } | |
1127 | ||
1128 | /* register the USB driver */ | |
1129 | result = usb_register(&usb_serial_driver); | |
1130 | if (result < 0) { | |
1131 | err("%s - usb_register failed", __FUNCTION__); | |
1132 | goto exit_tty; | |
1133 | } | |
1134 | ||
06299db3 GKH |
1135 | /* register the generic driver, if we should */ |
1136 | result = usb_serial_generic_register(debug); | |
1137 | if (result < 0) { | |
1138 | err("%s - registering generic driver failed", __FUNCTION__); | |
1139 | goto exit_generic; | |
1140 | } | |
1141 | ||
17a882fc | 1142 | info(DRIVER_DESC); |
1da177e4 LT |
1143 | |
1144 | return result; | |
1145 | ||
06299db3 GKH |
1146 | exit_generic: |
1147 | usb_deregister(&usb_serial_driver); | |
1148 | ||
1da177e4 LT |
1149 | exit_tty: |
1150 | tty_unregister_driver(usb_serial_tty_driver); | |
1151 | ||
1152 | exit_reg_driver: | |
1da177e4 LT |
1153 | bus_unregister(&usb_serial_bus_type); |
1154 | ||
1155 | exit_bus: | |
1156 | err ("%s - returning with error %d", __FUNCTION__, result); | |
1157 | put_tty_driver(usb_serial_tty_driver); | |
1158 | return result; | |
1159 | } | |
1160 | ||
1161 | ||
1162 | static void __exit usb_serial_exit(void) | |
1163 | { | |
1164 | usb_serial_console_exit(); | |
1165 | ||
1166 | usb_serial_generic_deregister(); | |
1167 | ||
1168 | usb_deregister(&usb_serial_driver); | |
1169 | tty_unregister_driver(usb_serial_tty_driver); | |
1170 | put_tty_driver(usb_serial_tty_driver); | |
1171 | bus_unregister(&usb_serial_bus_type); | |
1172 | } | |
1173 | ||
1174 | ||
1175 | module_init(usb_serial_init); | |
1176 | module_exit(usb_serial_exit); | |
1177 | ||
1178 | #define set_to_generic_if_null(type, function) \ | |
1179 | do { \ | |
1180 | if (!type->function) { \ | |
1181 | type->function = usb_serial_generic_##function; \ | |
1182 | dbg("Had to override the " #function \ | |
1183 | " usb serial operation with the generic one.");\ | |
1184 | } \ | |
1185 | } while (0) | |
1186 | ||
ea65370d | 1187 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1188 | { |
1189 | set_to_generic_if_null(device, open); | |
1190 | set_to_generic_if_null(device, write); | |
1191 | set_to_generic_if_null(device, close); | |
1192 | set_to_generic_if_null(device, write_room); | |
1193 | set_to_generic_if_null(device, chars_in_buffer); | |
1194 | set_to_generic_if_null(device, read_bulk_callback); | |
1195 | set_to_generic_if_null(device, write_bulk_callback); | |
1196 | set_to_generic_if_null(device, shutdown); | |
1197 | } | |
1198 | ||
4b10f0f3 | 1199 | int usb_serial_register(struct usb_serial_driver *driver) /* must be called with BKL held */ |
1da177e4 LT |
1200 | { |
1201 | int retval; | |
1202 | ||
ea65370d | 1203 | fixup_generic(driver); |
1da177e4 | 1204 | |
269bda1c GKH |
1205 | if (!driver->description) |
1206 | driver->description = driver->driver.name; | |
1207 | ||
1da177e4 | 1208 | /* Add this device to our list of devices */ |
ea65370d | 1209 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1210 | |
ea65370d | 1211 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1212 | if (retval) { |
269bda1c | 1213 | err("problem %d when registering driver %s", retval, driver->description); |
ea65370d | 1214 | list_del(&driver->driver_list); |
1da177e4 LT |
1215 | } |
1216 | else | |
269bda1c | 1217 | info("USB Serial support registered for %s", driver->description); |
1da177e4 LT |
1218 | |
1219 | return retval; | |
1220 | } | |
1221 | ||
1222 | ||
4b10f0f3 | 1223 | void usb_serial_deregister(struct usb_serial_driver *device) /* must be called with BKL held */ |
1da177e4 | 1224 | { |
269bda1c | 1225 | info("USB Serial deregistering driver %s", device->description); |
1da177e4 LT |
1226 | list_del(&device->driver_list); |
1227 | usb_serial_bus_deregister(device); | |
1228 | } | |
1229 | ||
1230 | ||
1231 | ||
1232 | /* If the usb-serial core is built into the core, the usb-serial drivers | |
1233 | need these symbols to load properly as modules. */ | |
1234 | EXPORT_SYMBOL_GPL(usb_serial_register); | |
1235 | EXPORT_SYMBOL_GPL(usb_serial_deregister); | |
1236 | EXPORT_SYMBOL_GPL(usb_serial_probe); | |
1237 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); | |
1238 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); | |
1239 | ||
1240 | ||
1241 | /* Module information */ | |
1242 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1243 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1da177e4 LT |
1244 | MODULE_LICENSE("GPL"); |
1245 | ||
1246 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1247 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |