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 | 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, | |
ec22559e ON |
49 | .suspend = usb_serial_suspend, |
50 | .resume = usb_serial_resume, | |
ba9dc657 | 51 | .no_dynamic_id = 1, |
1da177e4 LT |
52 | }; |
53 | ||
54 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
55 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
56 | cause the "hotplug" program to pull in whatever module is necessary | |
57 | via modprobe, and modprobe will load usbserial because the serial | |
58 | drivers depend on it. | |
59 | */ | |
60 | ||
61 | static int debug; | |
62 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; /* initially all NULL */ | |
34ef50e5 | 63 | static spinlock_t table_lock; |
1da177e4 LT |
64 | static LIST_HEAD(usb_serial_driver_list); |
65 | ||
66 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
67 | { | |
34ef50e5 ON |
68 | struct usb_serial *serial; |
69 | ||
70 | spin_lock(&table_lock); | |
71 | serial = serial_table[index]; | |
1da177e4 LT |
72 | |
73 | if (serial) | |
74 | kref_get(&serial->kref); | |
34ef50e5 | 75 | spin_unlock(&table_lock); |
1da177e4 LT |
76 | return serial; |
77 | } | |
78 | ||
79 | static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor) | |
80 | { | |
81 | unsigned int i, j; | |
82 | int good_spot; | |
83 | ||
84 | dbg("%s %d", __FUNCTION__, num_ports); | |
85 | ||
86 | *minor = 0; | |
34ef50e5 | 87 | spin_lock(&table_lock); |
1da177e4 LT |
88 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
89 | if (serial_table[i]) | |
90 | continue; | |
91 | ||
92 | good_spot = 1; | |
93 | for (j = 1; j <= num_ports-1; ++j) | |
94 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
95 | good_spot = 0; | |
96 | i += j; | |
97 | break; | |
98 | } | |
99 | if (good_spot == 0) | |
100 | continue; | |
101 | ||
102 | *minor = i; | |
a1f721c8 | 103 | j = 0; |
1da177e4 | 104 | dbg("%s - minor base = %d", __FUNCTION__, *minor); |
a1f721c8 | 105 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 106 | serial_table[i] = serial; |
a1f721c8 ON |
107 | serial->port[j++]->number = i; |
108 | } | |
34ef50e5 | 109 | spin_unlock(&table_lock); |
1da177e4 LT |
110 | return serial; |
111 | } | |
34ef50e5 | 112 | spin_unlock(&table_lock); |
1da177e4 LT |
113 | return NULL; |
114 | } | |
115 | ||
116 | static void return_serial(struct usb_serial *serial) | |
117 | { | |
118 | int i; | |
119 | ||
120 | dbg("%s", __FUNCTION__); | |
121 | ||
122 | if (serial == NULL) | |
123 | return; | |
124 | ||
125 | for (i = 0; i < serial->num_ports; ++i) { | |
126 | serial_table[serial->minor + i] = NULL; | |
127 | } | |
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 | { | |
52f6b5e1 | 175 | spin_lock(&table_lock); |
73e487fd | 176 | kref_put(&serial->kref, destroy_serial); |
52f6b5e1 | 177 | spin_unlock(&table_lock); |
73e487fd GL |
178 | } |
179 | ||
1da177e4 LT |
180 | /***************************************************************************** |
181 | * Driver tty interface functions | |
182 | *****************************************************************************/ | |
183 | static int serial_open (struct tty_struct *tty, struct file * filp) | |
184 | { | |
185 | struct usb_serial *serial; | |
186 | struct usb_serial_port *port; | |
187 | unsigned int portNumber; | |
188 | int retval; | |
189 | ||
190 | dbg("%s", __FUNCTION__); | |
191 | ||
192 | /* get the serial object associated with this tty pointer */ | |
193 | serial = usb_serial_get_by_index(tty->index); | |
194 | if (!serial) { | |
195 | tty->driver_data = NULL; | |
196 | return -ENODEV; | |
197 | } | |
198 | ||
199 | portNumber = tty->index - serial->minor; | |
200 | port = serial->port[portNumber]; | |
71a84163 LFC |
201 | if (!port) { |
202 | retval = -ENODEV; | |
203 | goto bailout_kref_put; | |
204 | } | |
8a4613f0 | 205 | |
71a84163 LFC |
206 | if (mutex_lock_interruptible(&port->mutex)) { |
207 | retval = -ERESTARTSYS; | |
208 | goto bailout_kref_put; | |
209 | } | |
1da177e4 LT |
210 | |
211 | ++port->open_count; | |
212 | ||
ca85485c PF |
213 | /* set up our port structure making the tty driver |
214 | * remember our port object, and us it */ | |
215 | tty->driver_data = port; | |
216 | port->tty = tty; | |
1da177e4 | 217 | |
ca85485c | 218 | if (port->open_count == 1) { |
1da177e4 LT |
219 | |
220 | /* lock this module before we call it | |
221 | * this may fail, which means we must bail out, | |
222 | * safe because we are called with BKL held */ | |
18fcac35 | 223 | if (!try_module_get(serial->type->driver.owner)) { |
1da177e4 | 224 | retval = -ENODEV; |
71a84163 | 225 | goto bailout_mutex_unlock; |
1da177e4 LT |
226 | } |
227 | ||
228 | /* only call the device specific open if this | |
229 | * is the first time the port is opened */ | |
230 | retval = serial->type->open(port, filp); | |
231 | if (retval) | |
232 | goto bailout_module_put; | |
233 | } | |
234 | ||
1ce7dd26 | 235 | mutex_unlock(&port->mutex); |
1da177e4 LT |
236 | return 0; |
237 | ||
238 | bailout_module_put: | |
18fcac35 | 239 | module_put(serial->type->driver.owner); |
71a84163 | 240 | bailout_mutex_unlock: |
1da177e4 | 241 | port->open_count = 0; |
b059c81a FG |
242 | tty->driver_data = NULL; |
243 | port->tty = NULL; | |
1ce7dd26 | 244 | mutex_unlock(&port->mutex); |
71a84163 | 245 | bailout_kref_put: |
73e487fd | 246 | usb_serial_put(serial); |
1da177e4 LT |
247 | return retval; |
248 | } | |
249 | ||
250 | static void serial_close(struct tty_struct *tty, struct file * filp) | |
251 | { | |
81671ddb | 252 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
253 | |
254 | if (!port) | |
255 | return; | |
256 | ||
257 | dbg("%s - port %d", __FUNCTION__, port->number); | |
258 | ||
1ce7dd26 | 259 | mutex_lock(&port->mutex); |
8a4613f0 | 260 | |
91c0bce2 | 261 | if (port->open_count == 0) { |
1ce7dd26 | 262 | mutex_unlock(&port->mutex); |
91c0bce2 GKH |
263 | return; |
264 | } | |
1da177e4 LT |
265 | |
266 | --port->open_count; | |
267 | if (port->open_count == 0) { | |
268 | /* only call the device specific close if this | |
269 | * port is being closed by the last owner */ | |
270 | port->serial->type->close(port, filp); | |
271 | ||
272 | if (port->tty) { | |
273 | if (port->tty->driver_data) | |
274 | port->tty->driver_data = NULL; | |
275 | port->tty = NULL; | |
276 | } | |
277 | ||
18fcac35 | 278 | module_put(port->serial->type->driver.owner); |
1da177e4 LT |
279 | } |
280 | ||
1ce7dd26 | 281 | mutex_unlock(&port->mutex); |
73e487fd | 282 | usb_serial_put(port->serial); |
1da177e4 LT |
283 | } |
284 | ||
285 | static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) | |
286 | { | |
81671ddb | 287 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 288 | int retval = -ENODEV; |
1da177e4 | 289 | |
73e487fd | 290 | if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
291 | goto exit; |
292 | ||
1da177e4 LT |
293 | dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count); |
294 | ||
295 | if (!port->open_count) { | |
3ff4fd94 | 296 | retval = -EINVAL; |
1da177e4 LT |
297 | dbg("%s - port not opened", __FUNCTION__); |
298 | goto exit; | |
299 | } | |
300 | ||
301 | /* pass on to the driver specific version of this function */ | |
302 | retval = port->serial->type->write(port, buf, count); | |
303 | ||
304 | exit: | |
305 | return retval; | |
306 | } | |
307 | ||
308 | static int serial_write_room (struct tty_struct *tty) | |
309 | { | |
81671ddb | 310 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 311 | int retval = -ENODEV; |
1da177e4 | 312 | |
487f9c67 LFC |
313 | if (!port) |
314 | goto exit; | |
315 | ||
1da177e4 LT |
316 | dbg("%s - port %d", __FUNCTION__, port->number); |
317 | ||
318 | if (!port->open_count) { | |
319 | dbg("%s - port not open", __FUNCTION__); | |
320 | goto exit; | |
321 | } | |
322 | ||
323 | /* pass on to the driver specific version of this function */ | |
324 | retval = port->serial->type->write_room(port); | |
325 | ||
326 | exit: | |
327 | return retval; | |
328 | } | |
329 | ||
330 | static int serial_chars_in_buffer (struct tty_struct *tty) | |
331 | { | |
81671ddb | 332 | struct usb_serial_port *port = tty->driver_data; |
db54a53d | 333 | int retval = -ENODEV; |
1da177e4 | 334 | |
487f9c67 LFC |
335 | if (!port) |
336 | goto exit; | |
337 | ||
1da177e4 LT |
338 | dbg("%s = port %d", __FUNCTION__, port->number); |
339 | ||
340 | if (!port->open_count) { | |
341 | dbg("%s - port not open", __FUNCTION__); | |
342 | goto exit; | |
343 | } | |
344 | ||
345 | /* pass on to the driver specific version of this function */ | |
346 | retval = port->serial->type->chars_in_buffer(port); | |
347 | ||
348 | exit: | |
349 | return retval; | |
350 | } | |
351 | ||
352 | static void serial_throttle (struct tty_struct * tty) | |
353 | { | |
81671ddb | 354 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 355 | |
487f9c67 LFC |
356 | if (!port) |
357 | return; | |
358 | ||
1da177e4 LT |
359 | dbg("%s - port %d", __FUNCTION__, port->number); |
360 | ||
361 | if (!port->open_count) { | |
362 | dbg ("%s - port not open", __FUNCTION__); | |
363 | return; | |
364 | } | |
365 | ||
366 | /* pass on to the driver specific version of this function */ | |
367 | if (port->serial->type->throttle) | |
368 | port->serial->type->throttle(port); | |
369 | } | |
370 | ||
371 | static void serial_unthrottle (struct tty_struct * tty) | |
372 | { | |
81671ddb | 373 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 374 | |
487f9c67 LFC |
375 | if (!port) |
376 | return; | |
377 | ||
1da177e4 LT |
378 | dbg("%s - port %d", __FUNCTION__, port->number); |
379 | ||
380 | if (!port->open_count) { | |
381 | dbg("%s - port not open", __FUNCTION__); | |
382 | return; | |
383 | } | |
384 | ||
385 | /* pass on to the driver specific version of this function */ | |
386 | if (port->serial->type->unthrottle) | |
387 | port->serial->type->unthrottle(port); | |
388 | } | |
389 | ||
390 | static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) | |
391 | { | |
81671ddb | 392 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
393 | int retval = -ENODEV; |
394 | ||
487f9c67 LFC |
395 | if (!port) |
396 | goto exit; | |
397 | ||
1da177e4 LT |
398 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); |
399 | ||
400 | if (!port->open_count) { | |
401 | dbg ("%s - port not open", __FUNCTION__); | |
402 | goto exit; | |
403 | } | |
404 | ||
405 | /* pass on to the driver specific version of this function if it is available */ | |
406 | if (port->serial->type->ioctl) | |
407 | retval = port->serial->type->ioctl(port, file, cmd, arg); | |
408 | else | |
409 | retval = -ENOIOCTLCMD; | |
410 | ||
411 | exit: | |
412 | return retval; | |
413 | } | |
414 | ||
606d099c | 415 | static void serial_set_termios (struct tty_struct *tty, struct ktermios * old) |
1da177e4 | 416 | { |
81671ddb | 417 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 418 | |
487f9c67 LFC |
419 | if (!port) |
420 | return; | |
421 | ||
1da177e4 LT |
422 | dbg("%s - port %d", __FUNCTION__, port->number); |
423 | ||
424 | if (!port->open_count) { | |
425 | dbg("%s - port not open", __FUNCTION__); | |
426 | return; | |
427 | } | |
428 | ||
429 | /* pass on to the driver specific version of this function if it is available */ | |
430 | if (port->serial->type->set_termios) | |
431 | port->serial->type->set_termios(port, old); | |
432 | } | |
433 | ||
434 | static void serial_break (struct tty_struct *tty, int break_state) | |
435 | { | |
81671ddb | 436 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 437 | |
487f9c67 LFC |
438 | if (!port) |
439 | return; | |
440 | ||
1da177e4 LT |
441 | dbg("%s - port %d", __FUNCTION__, port->number); |
442 | ||
443 | if (!port->open_count) { | |
444 | dbg("%s - port not open", __FUNCTION__); | |
445 | return; | |
446 | } | |
447 | ||
448 | /* pass on to the driver specific version of this function if it is available */ | |
449 | if (port->serial->type->break_ctl) | |
450 | port->serial->type->break_ctl(port, break_state); | |
451 | } | |
452 | ||
453 | static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) | |
454 | { | |
455 | struct usb_serial *serial; | |
456 | int length = 0; | |
457 | int i; | |
458 | off_t begin = 0; | |
459 | char tmp[40]; | |
460 | ||
461 | dbg("%s", __FUNCTION__); | |
17a882fc | 462 | length += sprintf (page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
463 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
464 | serial = usb_serial_get_by_index(i); | |
465 | if (serial == NULL) | |
466 | continue; | |
467 | ||
468 | length += sprintf (page+length, "%d:", i); | |
18fcac35 GKH |
469 | if (serial->type->driver.owner) |
470 | length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner)); | |
269bda1c | 471 | length += sprintf (page+length, " name:\"%s\"", serial->type->description); |
1da177e4 LT |
472 | length += sprintf (page+length, " vendor:%04x product:%04x", |
473 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
474 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
475 | length += sprintf (page+length, " num_ports:%d", serial->num_ports); | |
476 | length += sprintf (page+length, " port:%d", i - serial->minor + 1); | |
477 | ||
478 | usb_make_path(serial->dev, tmp, sizeof(tmp)); | |
479 | length += sprintf (page+length, " path:%s", tmp); | |
480 | ||
481 | length += sprintf (page+length, "\n"); | |
59925838 MU |
482 | if ((length + begin) > (off + count)) { |
483 | usb_serial_put(serial); | |
1da177e4 | 484 | goto done; |
59925838 | 485 | } |
1da177e4 LT |
486 | if ((length + begin) < off) { |
487 | begin += length; | |
488 | length = 0; | |
489 | } | |
73e487fd | 490 | usb_serial_put(serial); |
1da177e4 LT |
491 | } |
492 | *eof = 1; | |
493 | done: | |
494 | if (off >= (length + begin)) | |
495 | return 0; | |
496 | *start = page + (off-begin); | |
497 | return ((count < begin+length-off) ? count : begin+length-off); | |
498 | } | |
499 | ||
500 | static int serial_tiocmget (struct tty_struct *tty, struct file *file) | |
501 | { | |
81671ddb | 502 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 503 | |
487f9c67 | 504 | if (!port) |
db54a53d | 505 | return -ENODEV; |
487f9c67 | 506 | |
1da177e4 LT |
507 | dbg("%s - port %d", __FUNCTION__, port->number); |
508 | ||
509 | if (!port->open_count) { | |
510 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 511 | return -ENODEV; |
1da177e4 LT |
512 | } |
513 | ||
514 | if (port->serial->type->tiocmget) | |
515 | return port->serial->type->tiocmget(port, file); | |
516 | ||
1da177e4 LT |
517 | return -EINVAL; |
518 | } | |
519 | ||
520 | static int serial_tiocmset (struct tty_struct *tty, struct file *file, | |
521 | unsigned int set, unsigned int clear) | |
522 | { | |
81671ddb | 523 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 524 | |
487f9c67 | 525 | if (!port) |
db54a53d | 526 | return -ENODEV; |
487f9c67 | 527 | |
1da177e4 LT |
528 | dbg("%s - port %d", __FUNCTION__, port->number); |
529 | ||
530 | if (!port->open_count) { | |
531 | dbg("%s - port not open", __FUNCTION__); | |
db54a53d | 532 | return -ENODEV; |
1da177e4 LT |
533 | } |
534 | ||
535 | if (port->serial->type->tiocmset) | |
536 | return port->serial->type->tiocmset(port, file, set, clear); | |
537 | ||
1da177e4 LT |
538 | return -EINVAL; |
539 | } | |
540 | ||
cf2c7481 PZ |
541 | /* |
542 | * We would be calling tty_wakeup here, but unfortunately some line | |
543 | * disciplines have an annoying habit of calling tty->write from | |
544 | * the write wakeup callback (e.g. n_hdlc.c). | |
545 | */ | |
546 | void usb_serial_port_softint(struct usb_serial_port *port) | |
547 | { | |
548 | schedule_work(&port->work); | |
549 | } | |
550 | ||
c4028958 | 551 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 552 | { |
c4028958 DH |
553 | struct usb_serial_port *port = |
554 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
555 | struct tty_struct *tty; |
556 | ||
557 | dbg("%s - port %d", __FUNCTION__, port->number); | |
558 | ||
559 | if (!port) | |
560 | return; | |
561 | ||
562 | tty = port->tty; | |
563 | if (!tty) | |
564 | return; | |
565 | ||
566 | tty_wakeup(tty); | |
567 | } | |
568 | ||
569 | static void port_release(struct device *dev) | |
570 | { | |
571 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
572 | ||
573 | dbg ("%s - %s", __FUNCTION__, dev->bus_id); | |
34f8e761 PZ |
574 | port_free(port); |
575 | } | |
576 | ||
34ef50e5 | 577 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 578 | { |
1da177e4 | 579 | usb_kill_urb(port->read_urb); |
1da177e4 | 580 | usb_kill_urb(port->write_urb); |
1da177e4 | 581 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 582 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
583 | } |
584 | ||
585 | static void port_free(struct usb_serial_port *port) | |
586 | { | |
587 | kill_traffic(port); | |
588 | usb_free_urb(port->read_urb); | |
589 | usb_free_urb(port->write_urb); | |
590 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 LT |
591 | usb_free_urb(port->interrupt_out_urb); |
592 | kfree(port->bulk_in_buffer); | |
593 | kfree(port->bulk_out_buffer); | |
594 | kfree(port->interrupt_in_buffer); | |
595 | kfree(port->interrupt_out_buffer); | |
34f8e761 | 596 | flush_scheduled_work(); /* port->work */ |
1da177e4 LT |
597 | kfree(port); |
598 | } | |
599 | ||
600 | static struct usb_serial * create_serial (struct usb_device *dev, | |
601 | struct usb_interface *interface, | |
ea65370d | 602 | struct usb_serial_driver *driver) |
1da177e4 LT |
603 | { |
604 | struct usb_serial *serial; | |
605 | ||
80b6ca48 | 606 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 LT |
607 | if (!serial) { |
608 | dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); | |
609 | return NULL; | |
610 | } | |
1da177e4 | 611 | serial->dev = usb_get_dev(dev); |
ea65370d | 612 | serial->type = driver; |
1da177e4 LT |
613 | serial->interface = interface; |
614 | kref_init(&serial->kref); | |
615 | ||
616 | return serial; | |
617 | } | |
618 | ||
93bacefc GKH |
619 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
620 | struct usb_serial_driver *drv) | |
621 | { | |
622 | struct usb_dynid *dynid; | |
623 | ||
624 | spin_lock(&drv->dynids.lock); | |
625 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
626 | if (usb_match_one_id(intf, &dynid->id)) { | |
627 | spin_unlock(&drv->dynids.lock); | |
628 | return &dynid->id; | |
629 | } | |
630 | } | |
631 | spin_unlock(&drv->dynids.lock); | |
632 | return NULL; | |
633 | } | |
634 | ||
635 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
636 | struct usb_interface *intf) | |
637 | { | |
638 | const struct usb_device_id *id; | |
639 | ||
640 | id = usb_match_id(intf, drv->id_table); | |
641 | if (id) { | |
642 | dbg("static descriptor matches"); | |
643 | goto exit; | |
644 | } | |
645 | id = match_dynamic_id(intf, drv); | |
646 | if (id) | |
647 | dbg("dynamic descriptor matches"); | |
648 | exit: | |
649 | return id; | |
650 | } | |
651 | ||
ea65370d | 652 | static struct usb_serial_driver *search_serial_device(struct usb_interface *iface) |
1da177e4 LT |
653 | { |
654 | struct list_head *p; | |
655 | const struct usb_device_id *id; | |
ea65370d | 656 | struct usb_serial_driver *t; |
1da177e4 | 657 | |
93b1fae4 | 658 | /* Check if the usb id matches a known device */ |
1da177e4 | 659 | list_for_each(p, &usb_serial_driver_list) { |
ea65370d | 660 | t = list_entry(p, struct usb_serial_driver, driver_list); |
93bacefc GKH |
661 | id = get_iface_id(t, iface); |
662 | if (id) | |
1da177e4 | 663 | return t; |
1da177e4 LT |
664 | } |
665 | ||
666 | return NULL; | |
667 | } | |
668 | ||
669 | int usb_serial_probe(struct usb_interface *interface, | |
670 | const struct usb_device_id *id) | |
671 | { | |
672 | struct usb_device *dev = interface_to_usbdev (interface); | |
673 | struct usb_serial *serial = NULL; | |
674 | struct usb_serial_port *port; | |
675 | struct usb_host_interface *iface_desc; | |
676 | struct usb_endpoint_descriptor *endpoint; | |
677 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
678 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
679 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
680 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 681 | struct usb_serial_driver *type = NULL; |
1da177e4 LT |
682 | int retval; |
683 | int minor; | |
684 | int buffer_size; | |
685 | int i; | |
686 | int num_interrupt_in = 0; | |
687 | int num_interrupt_out = 0; | |
688 | int num_bulk_in = 0; | |
689 | int num_bulk_out = 0; | |
690 | int num_ports = 0; | |
691 | int max_endpoints; | |
692 | ||
4b10f0f3 | 693 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
694 | type = search_serial_device(interface); |
695 | if (!type) { | |
4b10f0f3 | 696 | unlock_kernel(); |
1da177e4 LT |
697 | dbg("none matched"); |
698 | return -ENODEV; | |
699 | } | |
700 | ||
701 | serial = create_serial (dev, interface, type); | |
702 | if (!serial) { | |
4b10f0f3 | 703 | unlock_kernel(); |
1da177e4 LT |
704 | dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); |
705 | return -ENOMEM; | |
706 | } | |
707 | ||
708 | /* if this device type has a probe function, call it */ | |
709 | if (type->probe) { | |
710 | const struct usb_device_id *id; | |
711 | ||
18fcac35 | 712 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 713 | unlock_kernel(); |
1da177e4 LT |
714 | dev_err(&interface->dev, "module get failed, exiting\n"); |
715 | kfree (serial); | |
716 | return -EIO; | |
717 | } | |
718 | ||
93bacefc | 719 | id = get_iface_id(type, interface); |
1da177e4 | 720 | retval = type->probe(serial, id); |
18fcac35 | 721 | module_put(type->driver.owner); |
1da177e4 LT |
722 | |
723 | if (retval) { | |
4b10f0f3 | 724 | unlock_kernel(); |
1da177e4 LT |
725 | dbg ("sub driver rejected device"); |
726 | kfree (serial); | |
727 | return retval; | |
728 | } | |
729 | } | |
730 | ||
731 | /* descriptor matches, let's find the endpoints needed */ | |
732 | /* check out the endpoints */ | |
733 | iface_desc = interface->cur_altsetting; | |
734 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
735 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
736 | |
737 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
738 | /* we found a bulk in endpoint */ |
739 | dbg("found bulk in on endpoint %d", i); | |
740 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
741 | ++num_bulk_in; | |
742 | } | |
743 | ||
4fa1bbf5 | 744 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
745 | /* we found a bulk out endpoint */ |
746 | dbg("found bulk out on endpoint %d", i); | |
747 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
748 | ++num_bulk_out; | |
749 | } | |
4fa1bbf5 LFC |
750 | |
751 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
752 | /* we found a interrupt in endpoint */ |
753 | dbg("found interrupt in on endpoint %d", i); | |
754 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
755 | ++num_interrupt_in; | |
756 | } | |
757 | ||
4fa1bbf5 | 758 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
759 | /* we found an interrupt out endpoint */ |
760 | dbg("found interrupt out on endpoint %d", i); | |
761 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
762 | ++num_interrupt_out; | |
763 | } | |
764 | } | |
765 | ||
766 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
767 | /* BEGIN HORRIBLE HACK FOR PL2303 */ | |
768 | /* this is needed due to the looney way its endpoints are set up */ | |
769 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
770 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
771 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
772 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
773 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
774 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID))) { | |
1da177e4 LT |
775 | if (interface != dev->actconfig->interface[0]) { |
776 | /* check out the endpoints of the other interface*/ | |
777 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
778 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
779 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 780 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
781 | /* we found a interrupt in endpoint */ |
782 | dbg("found interrupt in for Prolific device on separate interface"); | |
783 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
784 | ++num_interrupt_in; | |
785 | } | |
786 | } | |
787 | } | |
788 | ||
789 | /* Now make sure the PL-2303 is configured correctly. | |
790 | * If not, give up now and hope this hack will work | |
791 | * properly during a later invocation of usb_serial_probe | |
792 | */ | |
793 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
4b10f0f3 | 794 | unlock_kernel(); |
1da177e4 LT |
795 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
796 | kfree (serial); | |
797 | return -ENODEV; | |
798 | } | |
799 | } | |
800 | /* END HORRIBLE HACK FOR PL2303 */ | |
801 | #endif | |
802 | ||
803 | /* found all that we need */ | |
269bda1c | 804 | dev_info(&interface->dev, "%s converter detected\n", type->description); |
1da177e4 LT |
805 | |
806 | #ifdef CONFIG_USB_SERIAL_GENERIC | |
807 | if (type == &usb_serial_generic_device) { | |
808 | num_ports = num_bulk_out; | |
809 | if (num_ports == 0) { | |
4b10f0f3 | 810 | unlock_kernel(); |
1da177e4 LT |
811 | dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n"); |
812 | kfree (serial); | |
813 | return -EIO; | |
814 | } | |
815 | } | |
816 | #endif | |
817 | if (!num_ports) { | |
818 | /* if this device type has a calc_num_ports function, call it */ | |
819 | if (type->calc_num_ports) { | |
18fcac35 | 820 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 821 | unlock_kernel(); |
1da177e4 LT |
822 | dev_err(&interface->dev, "module get failed, exiting\n"); |
823 | kfree (serial); | |
824 | return -EIO; | |
825 | } | |
826 | num_ports = type->calc_num_ports (serial); | |
18fcac35 | 827 | module_put(type->driver.owner); |
1da177e4 LT |
828 | } |
829 | if (!num_ports) | |
830 | num_ports = type->num_ports; | |
831 | } | |
832 | ||
1da177e4 LT |
833 | serial->num_ports = num_ports; |
834 | serial->num_bulk_in = num_bulk_in; | |
835 | serial->num_bulk_out = num_bulk_out; | |
836 | serial->num_interrupt_in = num_interrupt_in; | |
837 | serial->num_interrupt_out = num_interrupt_out; | |
838 | ||
839 | /* create our ports, we need as many as the max endpoints */ | |
840 | /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */ | |
841 | max_endpoints = max(num_bulk_in, num_bulk_out); | |
842 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
843 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
844 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
845 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
846 | unlock_kernel(); |
847 | ||
1da177e4 LT |
848 | dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints); |
849 | for (i = 0; i < max_endpoints; ++i) { | |
80b6ca48 | 850 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
851 | if (!port) |
852 | goto probe_error; | |
1da177e4 | 853 | port->serial = serial; |
507ca9bc | 854 | spin_lock_init(&port->lock); |
1ce7dd26 | 855 | mutex_init(&port->mutex); |
c4028958 | 856 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
857 | serial->port[i] = port; |
858 | } | |
859 | ||
860 | /* set up the endpoint information */ | |
861 | for (i = 0; i < num_bulk_in; ++i) { | |
862 | endpoint = bulk_in_endpoint[i]; | |
863 | port = serial->port[i]; | |
864 | port->read_urb = usb_alloc_urb (0, GFP_KERNEL); | |
865 | if (!port->read_urb) { | |
866 | dev_err(&interface->dev, "No free urbs available\n"); | |
867 | goto probe_error; | |
868 | } | |
869 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
870 | port->bulk_in_size = buffer_size; | |
871 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
872 | port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
873 | if (!port->bulk_in_buffer) { | |
874 | dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n"); | |
875 | goto probe_error; | |
876 | } | |
877 | usb_fill_bulk_urb (port->read_urb, dev, | |
878 | usb_rcvbulkpipe (dev, | |
879 | endpoint->bEndpointAddress), | |
880 | port->bulk_in_buffer, buffer_size, | |
881 | serial->type->read_bulk_callback, | |
882 | port); | |
883 | } | |
884 | ||
885 | for (i = 0; i < num_bulk_out; ++i) { | |
886 | endpoint = bulk_out_endpoint[i]; | |
887 | port = serial->port[i]; | |
888 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
889 | if (!port->write_urb) { | |
890 | dev_err(&interface->dev, "No free urbs available\n"); | |
891 | goto probe_error; | |
892 | } | |
893 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
894 | port->bulk_out_size = buffer_size; | |
895 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
896 | port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
897 | if (!port->bulk_out_buffer) { | |
898 | dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n"); | |
899 | goto probe_error; | |
900 | } | |
901 | usb_fill_bulk_urb (port->write_urb, dev, | |
902 | usb_sndbulkpipe (dev, | |
903 | endpoint->bEndpointAddress), | |
904 | port->bulk_out_buffer, buffer_size, | |
905 | serial->type->write_bulk_callback, | |
906 | port); | |
907 | } | |
908 | ||
909 | if (serial->type->read_int_callback) { | |
910 | for (i = 0; i < num_interrupt_in; ++i) { | |
911 | endpoint = interrupt_in_endpoint[i]; | |
912 | port = serial->port[i]; | |
913 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
914 | if (!port->interrupt_in_urb) { | |
915 | dev_err(&interface->dev, "No free urbs available\n"); | |
916 | goto probe_error; | |
917 | } | |
918 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
919 | port->interrupt_in_endpointAddress = endpoint->bEndpointAddress; | |
920 | port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
921 | if (!port->interrupt_in_buffer) { | |
922 | dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n"); | |
923 | goto probe_error; | |
924 | } | |
925 | usb_fill_int_urb (port->interrupt_in_urb, dev, | |
926 | usb_rcvintpipe (dev, | |
927 | endpoint->bEndpointAddress), | |
928 | port->interrupt_in_buffer, buffer_size, | |
929 | serial->type->read_int_callback, port, | |
930 | endpoint->bInterval); | |
931 | } | |
932 | } else if (num_interrupt_in) { | |
933 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
934 | } | |
935 | ||
936 | if (serial->type->write_int_callback) { | |
937 | for (i = 0; i < num_interrupt_out; ++i) { | |
938 | endpoint = interrupt_out_endpoint[i]; | |
939 | port = serial->port[i]; | |
940 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
941 | if (!port->interrupt_out_urb) { | |
942 | dev_err(&interface->dev, "No free urbs available\n"); | |
943 | goto probe_error; | |
944 | } | |
945 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
946 | port->interrupt_out_size = buffer_size; | |
947 | port->interrupt_out_endpointAddress = endpoint->bEndpointAddress; | |
948 | port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
949 | if (!port->interrupt_out_buffer) { | |
950 | dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n"); | |
951 | goto probe_error; | |
952 | } | |
953 | usb_fill_int_urb (port->interrupt_out_urb, dev, | |
954 | usb_sndintpipe (dev, | |
955 | endpoint->bEndpointAddress), | |
956 | port->interrupt_out_buffer, buffer_size, | |
957 | serial->type->write_int_callback, port, | |
958 | endpoint->bInterval); | |
959 | } | |
960 | } else if (num_interrupt_out) { | |
961 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
962 | } | |
963 | ||
964 | /* if this device type has an attach function, call it */ | |
965 | if (type->attach) { | |
18fcac35 | 966 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
967 | dev_err(&interface->dev, "module get failed, exiting\n"); |
968 | goto probe_error; | |
969 | } | |
970 | retval = type->attach (serial); | |
18fcac35 | 971 | module_put(type->driver.owner); |
1da177e4 LT |
972 | if (retval < 0) |
973 | goto probe_error; | |
974 | if (retval > 0) { | |
975 | /* quietly accept this device, but don't bind to a serial port | |
976 | * as it's about to disappear */ | |
977 | goto exit; | |
978 | } | |
979 | } | |
980 | ||
34ef50e5 ON |
981 | if (get_free_serial (serial, num_ports, &minor) == NULL) { |
982 | dev_err(&interface->dev, "No more free serial devices\n"); | |
983 | goto probe_error; | |
984 | } | |
c744f99e | 985 | serial->minor = minor; |
34ef50e5 | 986 | |
1da177e4 LT |
987 | /* register all of the individual ports with the driver core */ |
988 | for (i = 0; i < num_ports; ++i) { | |
989 | port = serial->port[i]; | |
990 | port->dev.parent = &interface->dev; | |
991 | port->dev.driver = NULL; | |
992 | port->dev.bus = &usb_serial_bus_type; | |
993 | port->dev.release = &port_release; | |
994 | ||
995 | snprintf (&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number); | |
996 | dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id); | |
13f4db9e GKH |
997 | retval = device_register(&port->dev); |
998 | if (retval) | |
999 | dev_err(&port->dev, "Error registering port device, " | |
1000 | "continuing\n"); | |
1da177e4 LT |
1001 | } |
1002 | ||
1003 | usb_serial_console_init (debug, minor); | |
1004 | ||
1005 | exit: | |
1006 | /* success */ | |
1007 | usb_set_intfdata (interface, serial); | |
1008 | return 0; | |
1009 | ||
1010 | probe_error: | |
1011 | for (i = 0; i < num_bulk_in; ++i) { | |
1012 | port = serial->port[i]; | |
1013 | if (!port) | |
1014 | continue; | |
95d43166 | 1015 | usb_free_urb(port->read_urb); |
1da177e4 LT |
1016 | kfree(port->bulk_in_buffer); |
1017 | } | |
1018 | for (i = 0; i < num_bulk_out; ++i) { | |
1019 | port = serial->port[i]; | |
1020 | if (!port) | |
1021 | continue; | |
95d43166 | 1022 | usb_free_urb(port->write_urb); |
1da177e4 LT |
1023 | kfree(port->bulk_out_buffer); |
1024 | } | |
1025 | for (i = 0; i < num_interrupt_in; ++i) { | |
1026 | port = serial->port[i]; | |
1027 | if (!port) | |
1028 | continue; | |
95d43166 | 1029 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 LT |
1030 | kfree(port->interrupt_in_buffer); |
1031 | } | |
1032 | for (i = 0; i < num_interrupt_out; ++i) { | |
1033 | port = serial->port[i]; | |
1034 | if (!port) | |
1035 | continue; | |
95d43166 | 1036 | usb_free_urb(port->interrupt_out_urb); |
1da177e4 LT |
1037 | kfree(port->interrupt_out_buffer); |
1038 | } | |
1039 | ||
1da177e4 LT |
1040 | /* free up any memory that we allocated */ |
1041 | for (i = 0; i < serial->num_port_pointers; ++i) | |
1042 | kfree(serial->port[i]); | |
1043 | kfree (serial); | |
1044 | return -EIO; | |
1045 | } | |
1046 | ||
1047 | void usb_serial_disconnect(struct usb_interface *interface) | |
1048 | { | |
1049 | int i; | |
1050 | struct usb_serial *serial = usb_get_intfdata (interface); | |
1051 | struct device *dev = &interface->dev; | |
1052 | struct usb_serial_port *port; | |
1053 | ||
73e487fd | 1054 | usb_serial_console_disconnect(serial); |
1da177e4 LT |
1055 | dbg ("%s", __FUNCTION__); |
1056 | ||
1057 | usb_set_intfdata (interface, NULL); | |
1058 | if (serial) { | |
1059 | for (i = 0; i < serial->num_ports; ++i) { | |
1060 | port = serial->port[i]; | |
34ef50e5 ON |
1061 | if (port) { |
1062 | if (port->tty) | |
1063 | tty_hangup(port->tty); | |
1064 | kill_traffic(port); | |
1065 | } | |
1da177e4 LT |
1066 | } |
1067 | /* let the last holder of this object | |
1068 | * cause it to be cleaned up */ | |
73e487fd | 1069 | usb_serial_put(serial); |
1da177e4 LT |
1070 | } |
1071 | dev_info(dev, "device disconnected\n"); | |
1072 | } | |
1073 | ||
ec22559e ON |
1074 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1075 | { | |
1076 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1077 | struct usb_serial_port *port; | |
1078 | int i, r = 0; | |
1079 | ||
1080 | if (serial) { | |
1081 | for (i = 0; i < serial->num_ports; ++i) { | |
1082 | port = serial->port[i]; | |
1083 | if (port) | |
1084 | kill_traffic(port); | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | if (serial->type->suspend) | |
1089 | serial->type->suspend(serial, message); | |
1090 | ||
1091 | return r; | |
1092 | } | |
1093 | EXPORT_SYMBOL(usb_serial_suspend); | |
1094 | ||
1095 | int usb_serial_resume(struct usb_interface *intf) | |
1096 | { | |
1097 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1098 | ||
1099 | return serial->type->resume(serial); | |
1100 | } | |
1101 | EXPORT_SYMBOL(usb_serial_resume); | |
1102 | ||
b68e31d0 | 1103 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1104 | .open = serial_open, |
1105 | .close = serial_close, | |
1106 | .write = serial_write, | |
1107 | .write_room = serial_write_room, | |
1108 | .ioctl = serial_ioctl, | |
1109 | .set_termios = serial_set_termios, | |
1110 | .throttle = serial_throttle, | |
1111 | .unthrottle = serial_unthrottle, | |
1112 | .break_ctl = serial_break, | |
1113 | .chars_in_buffer = serial_chars_in_buffer, | |
1114 | .read_proc = serial_read_proc, | |
1115 | .tiocmget = serial_tiocmget, | |
1116 | .tiocmset = serial_tiocmset, | |
1117 | }; | |
1118 | ||
1119 | struct tty_driver *usb_serial_tty_driver; | |
1120 | ||
1121 | static int __init usb_serial_init(void) | |
1122 | { | |
1123 | int i; | |
1124 | int result; | |
1125 | ||
1126 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1127 | if (!usb_serial_tty_driver) | |
1128 | return -ENOMEM; | |
1129 | ||
1130 | /* Initialize our global data */ | |
34ef50e5 | 1131 | spin_lock_init(&table_lock); |
1da177e4 LT |
1132 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
1133 | serial_table[i] = NULL; | |
1134 | } | |
1135 | ||
1136 | result = bus_register(&usb_serial_bus_type); | |
1137 | if (result) { | |
1138 | err("%s - registering bus driver failed", __FUNCTION__); | |
1139 | goto exit_bus; | |
1140 | } | |
1141 | ||
1da177e4 LT |
1142 | usb_serial_tty_driver->owner = THIS_MODULE; |
1143 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1144 | usb_serial_tty_driver->name = "ttyUSB"; |
1145 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1146 | usb_serial_tty_driver->minor_start = 0; | |
1147 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1148 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
331b8319 | 1149 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1150 | usb_serial_tty_driver->init_termios = tty_std_termios; |
1151 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1152 | tty_set_operations(usb_serial_tty_driver, &serial_ops); | |
1153 | result = tty_register_driver(usb_serial_tty_driver); | |
1154 | if (result) { | |
1155 | err("%s - tty_register_driver failed", __FUNCTION__); | |
1156 | goto exit_reg_driver; | |
1157 | } | |
1158 | ||
1159 | /* register the USB driver */ | |
1160 | result = usb_register(&usb_serial_driver); | |
1161 | if (result < 0) { | |
1162 | err("%s - usb_register failed", __FUNCTION__); | |
1163 | goto exit_tty; | |
1164 | } | |
1165 | ||
06299db3 GKH |
1166 | /* register the generic driver, if we should */ |
1167 | result = usb_serial_generic_register(debug); | |
1168 | if (result < 0) { | |
1169 | err("%s - registering generic driver failed", __FUNCTION__); | |
1170 | goto exit_generic; | |
1171 | } | |
1172 | ||
17a882fc | 1173 | info(DRIVER_DESC); |
1da177e4 LT |
1174 | |
1175 | return result; | |
1176 | ||
06299db3 GKH |
1177 | exit_generic: |
1178 | usb_deregister(&usb_serial_driver); | |
1179 | ||
1da177e4 LT |
1180 | exit_tty: |
1181 | tty_unregister_driver(usb_serial_tty_driver); | |
1182 | ||
1183 | exit_reg_driver: | |
1da177e4 LT |
1184 | bus_unregister(&usb_serial_bus_type); |
1185 | ||
1186 | exit_bus: | |
1187 | err ("%s - returning with error %d", __FUNCTION__, result); | |
1188 | put_tty_driver(usb_serial_tty_driver); | |
1189 | return result; | |
1190 | } | |
1191 | ||
1192 | ||
1193 | static void __exit usb_serial_exit(void) | |
1194 | { | |
1195 | usb_serial_console_exit(); | |
1196 | ||
1197 | usb_serial_generic_deregister(); | |
1198 | ||
1199 | usb_deregister(&usb_serial_driver); | |
1200 | tty_unregister_driver(usb_serial_tty_driver); | |
1201 | put_tty_driver(usb_serial_tty_driver); | |
1202 | bus_unregister(&usb_serial_bus_type); | |
1203 | } | |
1204 | ||
1205 | ||
1206 | module_init(usb_serial_init); | |
1207 | module_exit(usb_serial_exit); | |
1208 | ||
1209 | #define set_to_generic_if_null(type, function) \ | |
1210 | do { \ | |
1211 | if (!type->function) { \ | |
1212 | type->function = usb_serial_generic_##function; \ | |
1213 | dbg("Had to override the " #function \ | |
1214 | " usb serial operation with the generic one.");\ | |
1215 | } \ | |
1216 | } while (0) | |
1217 | ||
ea65370d | 1218 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1219 | { |
1220 | set_to_generic_if_null(device, open); | |
1221 | set_to_generic_if_null(device, write); | |
1222 | set_to_generic_if_null(device, close); | |
1223 | set_to_generic_if_null(device, write_room); | |
1224 | set_to_generic_if_null(device, chars_in_buffer); | |
1225 | set_to_generic_if_null(device, read_bulk_callback); | |
1226 | set_to_generic_if_null(device, write_bulk_callback); | |
1227 | set_to_generic_if_null(device, shutdown); | |
1228 | } | |
1229 | ||
4b10f0f3 | 1230 | int usb_serial_register(struct usb_serial_driver *driver) /* must be called with BKL held */ |
1da177e4 LT |
1231 | { |
1232 | int retval; | |
1233 | ||
ea65370d | 1234 | fixup_generic(driver); |
1da177e4 | 1235 | |
269bda1c GKH |
1236 | if (!driver->description) |
1237 | driver->description = driver->driver.name; | |
1238 | ||
1da177e4 | 1239 | /* Add this device to our list of devices */ |
ea65370d | 1240 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1241 | |
ea65370d | 1242 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1243 | if (retval) { |
269bda1c | 1244 | err("problem %d when registering driver %s", retval, driver->description); |
ea65370d | 1245 | list_del(&driver->driver_list); |
1da177e4 LT |
1246 | } |
1247 | else | |
269bda1c | 1248 | info("USB Serial support registered for %s", driver->description); |
1da177e4 LT |
1249 | |
1250 | return retval; | |
1251 | } | |
1252 | ||
1253 | ||
4b10f0f3 | 1254 | void usb_serial_deregister(struct usb_serial_driver *device) /* must be called with BKL held */ |
1da177e4 | 1255 | { |
269bda1c | 1256 | info("USB Serial deregistering driver %s", device->description); |
1da177e4 LT |
1257 | list_del(&device->driver_list); |
1258 | usb_serial_bus_deregister(device); | |
1259 | } | |
1260 | ||
1261 | ||
1262 | ||
1263 | /* If the usb-serial core is built into the core, the usb-serial drivers | |
1264 | need these symbols to load properly as modules. */ | |
1265 | EXPORT_SYMBOL_GPL(usb_serial_register); | |
1266 | EXPORT_SYMBOL_GPL(usb_serial_deregister); | |
1267 | EXPORT_SYMBOL_GPL(usb_serial_probe); | |
1268 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); | |
1269 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); | |
1270 | ||
1271 | ||
1272 | /* Module information */ | |
1273 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1274 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1da177e4 LT |
1275 | MODULE_LICENSE("GPL"); |
1276 | ||
1277 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1278 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |