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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, | |
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 */ | |
3ddad823 | 63 | static DEFINE_MUTEX(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 | ||
3ddad823 | 70 | mutex_lock(&table_lock); |
34ef50e5 | 71 | serial = serial_table[index]; |
1da177e4 LT |
72 | |
73 | if (serial) | |
74 | kref_get(&serial->kref); | |
3ddad823 | 75 | mutex_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 | ||
441b62c1 | 84 | dbg("%s %d", __func__, num_ports); |
1da177e4 LT |
85 | |
86 | *minor = 0; | |
3ddad823 | 87 | mutex_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; |
441b62c1 | 104 | dbg("%s - minor base = %d", __func__, *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 | } | |
3ddad823 | 109 | mutex_unlock(&table_lock); |
1da177e4 LT |
110 | return serial; |
111 | } | |
3ddad823 | 112 | mutex_unlock(&table_lock); |
1da177e4 LT |
113 | return NULL; |
114 | } | |
115 | ||
116 | static void return_serial(struct usb_serial *serial) | |
117 | { | |
118 | int i; | |
119 | ||
441b62c1 | 120 | dbg("%s", __func__); |
1da177e4 LT |
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 | ||
441b62c1 | 138 | dbg("%s - %s", __func__, 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 | { | |
3ddad823 | 175 | mutex_lock(&table_lock); |
73e487fd | 176 | kref_put(&serial->kref, destroy_serial); |
3ddad823 | 177 | mutex_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 | ||
441b62c1 | 190 | dbg("%s", __func__); |
1da177e4 LT |
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 | ||
f0fbd5b9 SS |
228 | retval = usb_autopm_get_interface(serial->interface); |
229 | if (retval) | |
230 | goto bailout_module_put; | |
1da177e4 LT |
231 | /* only call the device specific open if this |
232 | * is the first time the port is opened */ | |
233 | retval = serial->type->open(port, filp); | |
234 | if (retval) | |
f0fbd5b9 | 235 | goto bailout_interface_put; |
1da177e4 LT |
236 | } |
237 | ||
1ce7dd26 | 238 | mutex_unlock(&port->mutex); |
1da177e4 LT |
239 | return 0; |
240 | ||
f0fbd5b9 SS |
241 | bailout_interface_put: |
242 | usb_autopm_put_interface(serial->interface); | |
1da177e4 | 243 | bailout_module_put: |
18fcac35 | 244 | module_put(serial->type->driver.owner); |
71a84163 | 245 | bailout_mutex_unlock: |
1da177e4 | 246 | port->open_count = 0; |
b059c81a FG |
247 | tty->driver_data = NULL; |
248 | port->tty = NULL; | |
1ce7dd26 | 249 | mutex_unlock(&port->mutex); |
71a84163 | 250 | bailout_kref_put: |
73e487fd | 251 | usb_serial_put(serial); |
1da177e4 LT |
252 | return retval; |
253 | } | |
254 | ||
255 | static void serial_close(struct tty_struct *tty, struct file * filp) | |
256 | { | |
81671ddb | 257 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
258 | |
259 | if (!port) | |
260 | return; | |
261 | ||
441b62c1 | 262 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 263 | |
1ce7dd26 | 264 | mutex_lock(&port->mutex); |
8a4613f0 | 265 | |
91c0bce2 | 266 | if (port->open_count == 0) { |
1ce7dd26 | 267 | mutex_unlock(&port->mutex); |
91c0bce2 GKH |
268 | return; |
269 | } | |
1da177e4 LT |
270 | |
271 | --port->open_count; | |
9a6b1efa | 272 | if (port->open_count == 0) |
1da177e4 LT |
273 | /* only call the device specific close if this |
274 | * port is being closed by the last owner */ | |
275 | port->serial->type->close(port, filp); | |
276 | ||
9a6b1efa | 277 | if (port->open_count == (port->console? 1 : 0)) { |
1da177e4 LT |
278 | if (port->tty) { |
279 | if (port->tty->driver_data) | |
280 | port->tty->driver_data = NULL; | |
281 | port->tty = NULL; | |
282 | } | |
9a6b1efa | 283 | } |
1da177e4 | 284 | |
f0fbd5b9 SS |
285 | if (port->open_count == 0) { |
286 | usb_autopm_put_interface(port->serial->interface); | |
18fcac35 | 287 | module_put(port->serial->type->driver.owner); |
f0fbd5b9 | 288 | } |
1da177e4 | 289 | |
1ce7dd26 | 290 | mutex_unlock(&port->mutex); |
73e487fd | 291 | usb_serial_put(port->serial); |
1da177e4 LT |
292 | } |
293 | ||
294 | static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) | |
295 | { | |
81671ddb | 296 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 297 | int retval = -ENODEV; |
1da177e4 | 298 | |
f34d7a5b | 299 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
300 | goto exit; |
301 | ||
441b62c1 | 302 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
1da177e4 | 303 | |
f34d7a5b AC |
304 | /* open_count is managed under the mutex lock for the tty so cannot |
305 | drop to zero until after the last close completes */ | |
306 | WARN_ON(!port->open_count); | |
1da177e4 LT |
307 | |
308 | /* pass on to the driver specific version of this function */ | |
309 | retval = port->serial->type->write(port, buf, count); | |
310 | ||
311 | exit: | |
312 | return retval; | |
313 | } | |
314 | ||
315 | static int serial_write_room (struct tty_struct *tty) | |
316 | { | |
81671ddb | 317 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 318 | dbg("%s - port %d", __func__, port->number); |
f34d7a5b | 319 | WARN_ON(!port->open_count); |
1da177e4 | 320 | /* pass on to the driver specific version of this function */ |
f34d7a5b | 321 | return port->serial->type->write_room(port); |
1da177e4 LT |
322 | } |
323 | ||
324 | static int serial_chars_in_buffer (struct tty_struct *tty) | |
325 | { | |
81671ddb | 326 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 327 | dbg("%s = port %d", __func__, port->number); |
1da177e4 | 328 | |
f34d7a5b | 329 | WARN_ON(!port->open_count); |
1da177e4 | 330 | /* pass on to the driver specific version of this function */ |
f34d7a5b | 331 | return port->serial->type->chars_in_buffer(port); |
1da177e4 LT |
332 | } |
333 | ||
334 | static void serial_throttle (struct tty_struct * tty) | |
335 | { | |
81671ddb | 336 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 337 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 338 | |
f34d7a5b | 339 | WARN_ON(!port->open_count); |
1da177e4 LT |
340 | /* pass on to the driver specific version of this function */ |
341 | if (port->serial->type->throttle) | |
342 | port->serial->type->throttle(port); | |
343 | } | |
344 | ||
345 | static void serial_unthrottle (struct tty_struct * tty) | |
346 | { | |
81671ddb | 347 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 348 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 349 | |
f34d7a5b | 350 | WARN_ON(!port->open_count); |
1da177e4 LT |
351 | /* pass on to the driver specific version of this function */ |
352 | if (port->serial->type->unthrottle) | |
353 | port->serial->type->unthrottle(port); | |
354 | } | |
355 | ||
356 | static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) | |
357 | { | |
81671ddb | 358 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
359 | int retval = -ENODEV; |
360 | ||
441b62c1 | 361 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 | 362 | |
f34d7a5b | 363 | WARN_ON(!port->open_count); |
1da177e4 LT |
364 | |
365 | /* pass on to the driver specific version of this function if it is available */ | |
f34d7a5b AC |
366 | if (port->serial->type->ioctl) { |
367 | lock_kernel(); | |
1da177e4 | 368 | retval = port->serial->type->ioctl(port, file, cmd, arg); |
f34d7a5b AC |
369 | unlock_kernel(); |
370 | } | |
1da177e4 LT |
371 | else |
372 | retval = -ENOIOCTLCMD; | |
1da177e4 LT |
373 | return retval; |
374 | } | |
375 | ||
606d099c | 376 | static void serial_set_termios (struct tty_struct *tty, struct ktermios * old) |
1da177e4 | 377 | { |
81671ddb | 378 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 379 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 380 | |
f34d7a5b | 381 | WARN_ON(!port->open_count); |
1da177e4 LT |
382 | /* pass on to the driver specific version of this function if it is available */ |
383 | if (port->serial->type->set_termios) | |
384 | port->serial->type->set_termios(port, old); | |
33785091 AC |
385 | else |
386 | tty_termios_copy_hw(tty->termios, old); | |
1da177e4 LT |
387 | } |
388 | ||
389 | static void serial_break (struct tty_struct *tty, int break_state) | |
390 | { | |
81671ddb | 391 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 392 | |
441b62c1 | 393 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 394 | |
f34d7a5b | 395 | WARN_ON(!port->open_count); |
1da177e4 | 396 | /* pass on to the driver specific version of this function if it is available */ |
f34d7a5b AC |
397 | if (port->serial->type->break_ctl) { |
398 | lock_kernel(); | |
1da177e4 | 399 | port->serial->type->break_ctl(port, break_state); |
f34d7a5b AC |
400 | unlock_kernel(); |
401 | } | |
1da177e4 LT |
402 | } |
403 | ||
404 | static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) | |
405 | { | |
406 | struct usb_serial *serial; | |
407 | int length = 0; | |
408 | int i; | |
409 | off_t begin = 0; | |
410 | char tmp[40]; | |
411 | ||
441b62c1 | 412 | dbg("%s", __func__); |
17a882fc | 413 | length += sprintf (page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
414 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
415 | serial = usb_serial_get_by_index(i); | |
416 | if (serial == NULL) | |
417 | continue; | |
418 | ||
419 | length += sprintf (page+length, "%d:", i); | |
18fcac35 GKH |
420 | if (serial->type->driver.owner) |
421 | length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner)); | |
269bda1c | 422 | length += sprintf (page+length, " name:\"%s\"", serial->type->description); |
1da177e4 LT |
423 | length += sprintf (page+length, " vendor:%04x product:%04x", |
424 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
425 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
426 | length += sprintf (page+length, " num_ports:%d", serial->num_ports); | |
427 | length += sprintf (page+length, " port:%d", i - serial->minor + 1); | |
428 | ||
429 | usb_make_path(serial->dev, tmp, sizeof(tmp)); | |
430 | length += sprintf (page+length, " path:%s", tmp); | |
431 | ||
432 | length += sprintf (page+length, "\n"); | |
59925838 MU |
433 | if ((length + begin) > (off + count)) { |
434 | usb_serial_put(serial); | |
1da177e4 | 435 | goto done; |
59925838 | 436 | } |
1da177e4 LT |
437 | if ((length + begin) < off) { |
438 | begin += length; | |
439 | length = 0; | |
440 | } | |
73e487fd | 441 | usb_serial_put(serial); |
1da177e4 LT |
442 | } |
443 | *eof = 1; | |
444 | done: | |
445 | if (off >= (length + begin)) | |
446 | return 0; | |
447 | *start = page + (off-begin); | |
448 | return ((count < begin+length-off) ? count : begin+length-off); | |
449 | } | |
450 | ||
451 | static int serial_tiocmget (struct tty_struct *tty, struct file *file) | |
452 | { | |
81671ddb | 453 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 454 | |
441b62c1 | 455 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 456 | |
f34d7a5b | 457 | WARN_ON(!port->open_count); |
1da177e4 LT |
458 | if (port->serial->type->tiocmget) |
459 | return port->serial->type->tiocmget(port, file); | |
1da177e4 LT |
460 | return -EINVAL; |
461 | } | |
462 | ||
463 | static int serial_tiocmset (struct tty_struct *tty, struct file *file, | |
464 | unsigned int set, unsigned int clear) | |
465 | { | |
81671ddb | 466 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 467 | |
441b62c1 | 468 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 469 | |
f34d7a5b | 470 | WARN_ON(!port->open_count); |
1da177e4 LT |
471 | if (port->serial->type->tiocmset) |
472 | return port->serial->type->tiocmset(port, file, set, clear); | |
1da177e4 LT |
473 | return -EINVAL; |
474 | } | |
475 | ||
cf2c7481 PZ |
476 | /* |
477 | * We would be calling tty_wakeup here, but unfortunately some line | |
478 | * disciplines have an annoying habit of calling tty->write from | |
479 | * the write wakeup callback (e.g. n_hdlc.c). | |
480 | */ | |
481 | void usb_serial_port_softint(struct usb_serial_port *port) | |
482 | { | |
483 | schedule_work(&port->work); | |
484 | } | |
485 | ||
c4028958 | 486 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 487 | { |
c4028958 DH |
488 | struct usb_serial_port *port = |
489 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
490 | struct tty_struct *tty; |
491 | ||
441b62c1 | 492 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
493 | |
494 | if (!port) | |
495 | return; | |
496 | ||
497 | tty = port->tty; | |
498 | if (!tty) | |
499 | return; | |
500 | ||
501 | tty_wakeup(tty); | |
502 | } | |
503 | ||
504 | static void port_release(struct device *dev) | |
505 | { | |
506 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
507 | ||
7071a3ce | 508 | dbg ("%s - %s", __func__, dev_name(dev)); |
34f8e761 PZ |
509 | port_free(port); |
510 | } | |
511 | ||
34ef50e5 | 512 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 513 | { |
1da177e4 | 514 | usb_kill_urb(port->read_urb); |
1da177e4 | 515 | usb_kill_urb(port->write_urb); |
5adceac5 ON |
516 | /* |
517 | * This is tricky. | |
518 | * Some drivers submit the read_urb in the | |
519 | * handler for the write_urb or vice versa | |
520 | * this order determines the order in which | |
521 | * usb_kill_urb() must be used to reliably | |
522 | * kill the URBs. As it is unknown here, | |
523 | * both orders must be used in turn. | |
524 | * The call below is not redundant. | |
525 | */ | |
526 | usb_kill_urb(port->read_urb); | |
1da177e4 | 527 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 528 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
529 | } |
530 | ||
531 | static void port_free(struct usb_serial_port *port) | |
532 | { | |
533 | kill_traffic(port); | |
534 | usb_free_urb(port->read_urb); | |
535 | usb_free_urb(port->write_urb); | |
536 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 LT |
537 | usb_free_urb(port->interrupt_out_urb); |
538 | kfree(port->bulk_in_buffer); | |
539 | kfree(port->bulk_out_buffer); | |
540 | kfree(port->interrupt_in_buffer); | |
541 | kfree(port->interrupt_out_buffer); | |
34f8e761 | 542 | flush_scheduled_work(); /* port->work */ |
1da177e4 LT |
543 | kfree(port); |
544 | } | |
545 | ||
546 | static struct usb_serial * create_serial (struct usb_device *dev, | |
547 | struct usb_interface *interface, | |
ea65370d | 548 | struct usb_serial_driver *driver) |
1da177e4 LT |
549 | { |
550 | struct usb_serial *serial; | |
551 | ||
80b6ca48 | 552 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 553 | if (!serial) { |
441b62c1 | 554 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
555 | return NULL; |
556 | } | |
1da177e4 | 557 | serial->dev = usb_get_dev(dev); |
ea65370d | 558 | serial->type = driver; |
1da177e4 LT |
559 | serial->interface = interface; |
560 | kref_init(&serial->kref); | |
a1cd7e99 | 561 | mutex_init(&serial->disc_mutex); |
1da177e4 LT |
562 | |
563 | return serial; | |
564 | } | |
565 | ||
93bacefc GKH |
566 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
567 | struct usb_serial_driver *drv) | |
568 | { | |
569 | struct usb_dynid *dynid; | |
570 | ||
571 | spin_lock(&drv->dynids.lock); | |
572 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
573 | if (usb_match_one_id(intf, &dynid->id)) { | |
574 | spin_unlock(&drv->dynids.lock); | |
575 | return &dynid->id; | |
576 | } | |
577 | } | |
578 | spin_unlock(&drv->dynids.lock); | |
579 | return NULL; | |
580 | } | |
581 | ||
582 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
583 | struct usb_interface *intf) | |
584 | { | |
585 | const struct usb_device_id *id; | |
586 | ||
587 | id = usb_match_id(intf, drv->id_table); | |
588 | if (id) { | |
589 | dbg("static descriptor matches"); | |
590 | goto exit; | |
591 | } | |
592 | id = match_dynamic_id(intf, drv); | |
593 | if (id) | |
594 | dbg("dynamic descriptor matches"); | |
595 | exit: | |
596 | return id; | |
597 | } | |
598 | ||
ea65370d | 599 | static struct usb_serial_driver *search_serial_device(struct usb_interface *iface) |
1da177e4 | 600 | { |
1da177e4 | 601 | const struct usb_device_id *id; |
063a2da8 | 602 | struct usb_serial_driver *drv; |
1da177e4 | 603 | |
93b1fae4 | 604 | /* Check if the usb id matches a known device */ |
063a2da8 AS |
605 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
606 | id = get_iface_id(drv, iface); | |
93bacefc | 607 | if (id) |
063a2da8 | 608 | return drv; |
1da177e4 LT |
609 | } |
610 | ||
611 | return NULL; | |
612 | } | |
613 | ||
614 | int usb_serial_probe(struct usb_interface *interface, | |
615 | const struct usb_device_id *id) | |
616 | { | |
617 | struct usb_device *dev = interface_to_usbdev (interface); | |
618 | struct usb_serial *serial = NULL; | |
619 | struct usb_serial_port *port; | |
620 | struct usb_host_interface *iface_desc; | |
621 | struct usb_endpoint_descriptor *endpoint; | |
622 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
623 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
624 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
625 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 626 | struct usb_serial_driver *type = NULL; |
1da177e4 LT |
627 | int retval; |
628 | int minor; | |
629 | int buffer_size; | |
630 | int i; | |
631 | int num_interrupt_in = 0; | |
632 | int num_interrupt_out = 0; | |
633 | int num_bulk_in = 0; | |
634 | int num_bulk_out = 0; | |
635 | int num_ports = 0; | |
636 | int max_endpoints; | |
637 | ||
4b10f0f3 | 638 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
639 | type = search_serial_device(interface); |
640 | if (!type) { | |
4b10f0f3 | 641 | unlock_kernel(); |
1da177e4 LT |
642 | dbg("none matched"); |
643 | return -ENODEV; | |
644 | } | |
645 | ||
646 | serial = create_serial (dev, interface, type); | |
647 | if (!serial) { | |
4b10f0f3 | 648 | unlock_kernel(); |
441b62c1 | 649 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
650 | return -ENOMEM; |
651 | } | |
652 | ||
653 | /* if this device type has a probe function, call it */ | |
654 | if (type->probe) { | |
655 | const struct usb_device_id *id; | |
656 | ||
18fcac35 | 657 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 658 | unlock_kernel(); |
1da177e4 LT |
659 | dev_err(&interface->dev, "module get failed, exiting\n"); |
660 | kfree (serial); | |
661 | return -EIO; | |
662 | } | |
663 | ||
93bacefc | 664 | id = get_iface_id(type, interface); |
1da177e4 | 665 | retval = type->probe(serial, id); |
18fcac35 | 666 | module_put(type->driver.owner); |
1da177e4 LT |
667 | |
668 | if (retval) { | |
4b10f0f3 | 669 | unlock_kernel(); |
1da177e4 LT |
670 | dbg ("sub driver rejected device"); |
671 | kfree (serial); | |
672 | return retval; | |
673 | } | |
674 | } | |
675 | ||
676 | /* descriptor matches, let's find the endpoints needed */ | |
677 | /* check out the endpoints */ | |
678 | iface_desc = interface->cur_altsetting; | |
679 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
680 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
681 | |
682 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
683 | /* we found a bulk in endpoint */ |
684 | dbg("found bulk in on endpoint %d", i); | |
685 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
686 | ++num_bulk_in; | |
687 | } | |
688 | ||
4fa1bbf5 | 689 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
690 | /* we found a bulk out endpoint */ |
691 | dbg("found bulk out on endpoint %d", i); | |
692 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
693 | ++num_bulk_out; | |
694 | } | |
4fa1bbf5 LFC |
695 | |
696 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
697 | /* we found a interrupt in endpoint */ |
698 | dbg("found interrupt in on endpoint %d", i); | |
699 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
700 | ++num_interrupt_in; | |
701 | } | |
702 | ||
4fa1bbf5 | 703 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
704 | /* we found an interrupt out endpoint */ |
705 | dbg("found interrupt out on endpoint %d", i); | |
706 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
707 | ++num_interrupt_out; | |
708 | } | |
709 | } | |
710 | ||
711 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
712 | /* BEGIN HORRIBLE HACK FOR PL2303 */ | |
713 | /* this is needed due to the looney way its endpoints are set up */ | |
714 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
715 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
716 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
717 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
718 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
719 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID))) { | |
1da177e4 LT |
720 | if (interface != dev->actconfig->interface[0]) { |
721 | /* check out the endpoints of the other interface*/ | |
722 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
723 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
724 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 725 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
726 | /* we found a interrupt in endpoint */ |
727 | dbg("found interrupt in for Prolific device on separate interface"); | |
728 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
729 | ++num_interrupt_in; | |
730 | } | |
731 | } | |
732 | } | |
733 | ||
734 | /* Now make sure the PL-2303 is configured correctly. | |
735 | * If not, give up now and hope this hack will work | |
736 | * properly during a later invocation of usb_serial_probe | |
737 | */ | |
738 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
4b10f0f3 | 739 | unlock_kernel(); |
1da177e4 LT |
740 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
741 | kfree (serial); | |
742 | return -ENODEV; | |
743 | } | |
744 | } | |
745 | /* END HORRIBLE HACK FOR PL2303 */ | |
746 | #endif | |
747 | ||
1da177e4 LT |
748 | #ifdef CONFIG_USB_SERIAL_GENERIC |
749 | if (type == &usb_serial_generic_device) { | |
750 | num_ports = num_bulk_out; | |
751 | if (num_ports == 0) { | |
4b10f0f3 | 752 | unlock_kernel(); |
1da177e4 LT |
753 | dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n"); |
754 | kfree (serial); | |
755 | return -EIO; | |
756 | } | |
757 | } | |
758 | #endif | |
759 | if (!num_ports) { | |
760 | /* if this device type has a calc_num_ports function, call it */ | |
761 | if (type->calc_num_ports) { | |
18fcac35 | 762 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 763 | unlock_kernel(); |
1da177e4 LT |
764 | dev_err(&interface->dev, "module get failed, exiting\n"); |
765 | kfree (serial); | |
766 | return -EIO; | |
767 | } | |
768 | num_ports = type->calc_num_ports (serial); | |
18fcac35 | 769 | module_put(type->driver.owner); |
1da177e4 LT |
770 | } |
771 | if (!num_ports) | |
772 | num_ports = type->num_ports; | |
773 | } | |
774 | ||
1da177e4 LT |
775 | serial->num_ports = num_ports; |
776 | serial->num_bulk_in = num_bulk_in; | |
777 | serial->num_bulk_out = num_bulk_out; | |
778 | serial->num_interrupt_in = num_interrupt_in; | |
779 | serial->num_interrupt_out = num_interrupt_out; | |
780 | ||
063a2da8 AS |
781 | /* found all that we need */ |
782 | dev_info(&interface->dev, "%s converter detected\n", | |
783 | type->description); | |
784 | ||
1da177e4 LT |
785 | /* create our ports, we need as many as the max endpoints */ |
786 | /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */ | |
787 | max_endpoints = max(num_bulk_in, num_bulk_out); | |
788 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
789 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
790 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
791 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
792 | unlock_kernel(); |
793 | ||
441b62c1 | 794 | dbg("%s - setting up %d port structures for this device", __func__, max_endpoints); |
1da177e4 | 795 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 796 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
797 | if (!port) |
798 | goto probe_error; | |
1da177e4 | 799 | port->serial = serial; |
507ca9bc | 800 | spin_lock_init(&port->lock); |
1ce7dd26 | 801 | mutex_init(&port->mutex); |
c4028958 | 802 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
803 | serial->port[i] = port; |
804 | } | |
805 | ||
806 | /* set up the endpoint information */ | |
807 | for (i = 0; i < num_bulk_in; ++i) { | |
808 | endpoint = bulk_in_endpoint[i]; | |
809 | port = serial->port[i]; | |
810 | port->read_urb = usb_alloc_urb (0, GFP_KERNEL); | |
811 | if (!port->read_urb) { | |
812 | dev_err(&interface->dev, "No free urbs available\n"); | |
813 | goto probe_error; | |
814 | } | |
815 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
816 | port->bulk_in_size = buffer_size; | |
817 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
818 | port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
819 | if (!port->bulk_in_buffer) { | |
820 | dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n"); | |
821 | goto probe_error; | |
822 | } | |
823 | usb_fill_bulk_urb (port->read_urb, dev, | |
824 | usb_rcvbulkpipe (dev, | |
825 | endpoint->bEndpointAddress), | |
826 | port->bulk_in_buffer, buffer_size, | |
827 | serial->type->read_bulk_callback, | |
828 | port); | |
829 | } | |
830 | ||
831 | for (i = 0; i < num_bulk_out; ++i) { | |
832 | endpoint = bulk_out_endpoint[i]; | |
833 | port = serial->port[i]; | |
834 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
835 | if (!port->write_urb) { | |
836 | dev_err(&interface->dev, "No free urbs available\n"); | |
837 | goto probe_error; | |
838 | } | |
839 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
840 | port->bulk_out_size = buffer_size; | |
841 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
842 | port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
843 | if (!port->bulk_out_buffer) { | |
844 | dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n"); | |
845 | goto probe_error; | |
846 | } | |
847 | usb_fill_bulk_urb (port->write_urb, dev, | |
848 | usb_sndbulkpipe (dev, | |
849 | endpoint->bEndpointAddress), | |
850 | port->bulk_out_buffer, buffer_size, | |
851 | serial->type->write_bulk_callback, | |
852 | port); | |
853 | } | |
854 | ||
855 | if (serial->type->read_int_callback) { | |
856 | for (i = 0; i < num_interrupt_in; ++i) { | |
857 | endpoint = interrupt_in_endpoint[i]; | |
858 | port = serial->port[i]; | |
859 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
860 | if (!port->interrupt_in_urb) { | |
861 | dev_err(&interface->dev, "No free urbs available\n"); | |
862 | goto probe_error; | |
863 | } | |
864 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
865 | port->interrupt_in_endpointAddress = endpoint->bEndpointAddress; | |
866 | port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
867 | if (!port->interrupt_in_buffer) { | |
868 | dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n"); | |
869 | goto probe_error; | |
870 | } | |
871 | usb_fill_int_urb (port->interrupt_in_urb, dev, | |
872 | usb_rcvintpipe (dev, | |
873 | endpoint->bEndpointAddress), | |
874 | port->interrupt_in_buffer, buffer_size, | |
875 | serial->type->read_int_callback, port, | |
876 | endpoint->bInterval); | |
877 | } | |
878 | } else if (num_interrupt_in) { | |
879 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
880 | } | |
881 | ||
882 | if (serial->type->write_int_callback) { | |
883 | for (i = 0; i < num_interrupt_out; ++i) { | |
884 | endpoint = interrupt_out_endpoint[i]; | |
885 | port = serial->port[i]; | |
886 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
887 | if (!port->interrupt_out_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->interrupt_out_size = buffer_size; | |
893 | port->interrupt_out_endpointAddress = endpoint->bEndpointAddress; | |
894 | port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
895 | if (!port->interrupt_out_buffer) { | |
896 | dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n"); | |
897 | goto probe_error; | |
898 | } | |
899 | usb_fill_int_urb (port->interrupt_out_urb, dev, | |
900 | usb_sndintpipe (dev, | |
901 | endpoint->bEndpointAddress), | |
902 | port->interrupt_out_buffer, buffer_size, | |
903 | serial->type->write_int_callback, port, | |
904 | endpoint->bInterval); | |
905 | } | |
906 | } else if (num_interrupt_out) { | |
907 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
908 | } | |
909 | ||
910 | /* if this device type has an attach function, call it */ | |
911 | if (type->attach) { | |
18fcac35 | 912 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
913 | dev_err(&interface->dev, "module get failed, exiting\n"); |
914 | goto probe_error; | |
915 | } | |
916 | retval = type->attach (serial); | |
18fcac35 | 917 | module_put(type->driver.owner); |
1da177e4 LT |
918 | if (retval < 0) |
919 | goto probe_error; | |
920 | if (retval > 0) { | |
921 | /* quietly accept this device, but don't bind to a serial port | |
922 | * as it's about to disappear */ | |
923 | goto exit; | |
924 | } | |
925 | } | |
926 | ||
34ef50e5 ON |
927 | if (get_free_serial (serial, num_ports, &minor) == NULL) { |
928 | dev_err(&interface->dev, "No more free serial devices\n"); | |
929 | goto probe_error; | |
930 | } | |
c744f99e | 931 | serial->minor = minor; |
34ef50e5 | 932 | |
1da177e4 LT |
933 | /* register all of the individual ports with the driver core */ |
934 | for (i = 0; i < num_ports; ++i) { | |
935 | port = serial->port[i]; | |
936 | port->dev.parent = &interface->dev; | |
937 | port->dev.driver = NULL; | |
938 | port->dev.bus = &usb_serial_bus_type; | |
939 | port->dev.release = &port_release; | |
940 | ||
0031a06e | 941 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
7071a3ce | 942 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
13f4db9e GKH |
943 | retval = device_register(&port->dev); |
944 | if (retval) | |
945 | dev_err(&port->dev, "Error registering port device, " | |
946 | "continuing\n"); | |
1da177e4 LT |
947 | } |
948 | ||
949 | usb_serial_console_init (debug, minor); | |
950 | ||
951 | exit: | |
952 | /* success */ | |
953 | usb_set_intfdata (interface, serial); | |
954 | return 0; | |
955 | ||
956 | probe_error: | |
957 | for (i = 0; i < num_bulk_in; ++i) { | |
958 | port = serial->port[i]; | |
959 | if (!port) | |
960 | continue; | |
95d43166 | 961 | usb_free_urb(port->read_urb); |
1da177e4 LT |
962 | kfree(port->bulk_in_buffer); |
963 | } | |
964 | for (i = 0; i < num_bulk_out; ++i) { | |
965 | port = serial->port[i]; | |
966 | if (!port) | |
967 | continue; | |
95d43166 | 968 | usb_free_urb(port->write_urb); |
1da177e4 LT |
969 | kfree(port->bulk_out_buffer); |
970 | } | |
971 | for (i = 0; i < num_interrupt_in; ++i) { | |
972 | port = serial->port[i]; | |
973 | if (!port) | |
974 | continue; | |
95d43166 | 975 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 LT |
976 | kfree(port->interrupt_in_buffer); |
977 | } | |
978 | for (i = 0; i < num_interrupt_out; ++i) { | |
979 | port = serial->port[i]; | |
980 | if (!port) | |
981 | continue; | |
95d43166 | 982 | usb_free_urb(port->interrupt_out_urb); |
1da177e4 LT |
983 | kfree(port->interrupt_out_buffer); |
984 | } | |
985 | ||
1da177e4 LT |
986 | /* free up any memory that we allocated */ |
987 | for (i = 0; i < serial->num_port_pointers; ++i) | |
988 | kfree(serial->port[i]); | |
989 | kfree (serial); | |
990 | return -EIO; | |
991 | } | |
992 | ||
993 | void usb_serial_disconnect(struct usb_interface *interface) | |
994 | { | |
995 | int i; | |
996 | struct usb_serial *serial = usb_get_intfdata (interface); | |
997 | struct device *dev = &interface->dev; | |
998 | struct usb_serial_port *port; | |
999 | ||
73e487fd | 1000 | usb_serial_console_disconnect(serial); |
441b62c1 | 1001 | dbg ("%s", __func__); |
1da177e4 | 1002 | |
a1cd7e99 | 1003 | mutex_lock(&serial->disc_mutex); |
1da177e4 | 1004 | usb_set_intfdata (interface, NULL); |
a1cd7e99 ON |
1005 | /* must set a flag, to signal subdrivers */ |
1006 | serial->disconnected = 1; | |
1007 | for (i = 0; i < serial->num_ports; ++i) { | |
1008 | port = serial->port[i]; | |
1009 | if (port) { | |
1010 | if (port->tty) | |
1011 | tty_hangup(port->tty); | |
1012 | kill_traffic(port); | |
1da177e4 | 1013 | } |
1da177e4 | 1014 | } |
a1cd7e99 ON |
1015 | /* let the last holder of this object |
1016 | * cause it to be cleaned up */ | |
1017 | mutex_unlock(&serial->disc_mutex); | |
1018 | usb_serial_put(serial); | |
1da177e4 LT |
1019 | dev_info(dev, "device disconnected\n"); |
1020 | } | |
1021 | ||
ec22559e ON |
1022 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1023 | { | |
1024 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1025 | struct usb_serial_port *port; | |
1026 | int i, r = 0; | |
1027 | ||
e31c1880 ON |
1028 | for (i = 0; i < serial->num_ports; ++i) { |
1029 | port = serial->port[i]; | |
1030 | if (port) | |
1031 | kill_traffic(port); | |
ec22559e ON |
1032 | } |
1033 | ||
1034 | if (serial->type->suspend) | |
e31c1880 | 1035 | r = serial->type->suspend(serial, message); |
ec22559e ON |
1036 | |
1037 | return r; | |
1038 | } | |
1039 | EXPORT_SYMBOL(usb_serial_suspend); | |
1040 | ||
1041 | int usb_serial_resume(struct usb_interface *intf) | |
1042 | { | |
1043 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1044 | ||
8abaee23 SS |
1045 | if (serial->type->resume) |
1046 | return serial->type->resume(serial); | |
1047 | return 0; | |
ec22559e ON |
1048 | } |
1049 | EXPORT_SYMBOL(usb_serial_resume); | |
1050 | ||
b68e31d0 | 1051 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1052 | .open = serial_open, |
1053 | .close = serial_close, | |
1054 | .write = serial_write, | |
1055 | .write_room = serial_write_room, | |
1056 | .ioctl = serial_ioctl, | |
1057 | .set_termios = serial_set_termios, | |
1058 | .throttle = serial_throttle, | |
1059 | .unthrottle = serial_unthrottle, | |
1060 | .break_ctl = serial_break, | |
1061 | .chars_in_buffer = serial_chars_in_buffer, | |
1062 | .read_proc = serial_read_proc, | |
1063 | .tiocmget = serial_tiocmget, | |
1064 | .tiocmset = serial_tiocmset, | |
1065 | }; | |
1066 | ||
1067 | struct tty_driver *usb_serial_tty_driver; | |
1068 | ||
1069 | static int __init usb_serial_init(void) | |
1070 | { | |
1071 | int i; | |
1072 | int result; | |
1073 | ||
1074 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1075 | if (!usb_serial_tty_driver) | |
1076 | return -ENOMEM; | |
1077 | ||
1078 | /* Initialize our global data */ | |
1079 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1080 | serial_table[i] = NULL; | |
1081 | } | |
1082 | ||
1083 | result = bus_register(&usb_serial_bus_type); | |
1084 | if (result) { | |
441b62c1 | 1085 | err("%s - registering bus driver failed", __func__); |
1da177e4 LT |
1086 | goto exit_bus; |
1087 | } | |
1088 | ||
1da177e4 LT |
1089 | usb_serial_tty_driver->owner = THIS_MODULE; |
1090 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1091 | usb_serial_tty_driver->name = "ttyUSB"; |
1092 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1093 | usb_serial_tty_driver->minor_start = 0; | |
1094 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1095 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
331b8319 | 1096 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1097 | usb_serial_tty_driver->init_termios = tty_std_termios; |
1098 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
a5b6f60c AC |
1099 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1100 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1101 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1102 | result = tty_register_driver(usb_serial_tty_driver); | |
1103 | if (result) { | |
441b62c1 | 1104 | err("%s - tty_register_driver failed", __func__); |
1da177e4 LT |
1105 | goto exit_reg_driver; |
1106 | } | |
1107 | ||
1108 | /* register the USB driver */ | |
1109 | result = usb_register(&usb_serial_driver); | |
1110 | if (result < 0) { | |
441b62c1 | 1111 | err("%s - usb_register failed", __func__); |
1da177e4 LT |
1112 | goto exit_tty; |
1113 | } | |
1114 | ||
06299db3 GKH |
1115 | /* register the generic driver, if we should */ |
1116 | result = usb_serial_generic_register(debug); | |
1117 | if (result < 0) { | |
441b62c1 | 1118 | err("%s - registering generic driver failed", __func__); |
06299db3 GKH |
1119 | goto exit_generic; |
1120 | } | |
1121 | ||
17a882fc | 1122 | info(DRIVER_DESC); |
1da177e4 LT |
1123 | |
1124 | return result; | |
1125 | ||
06299db3 GKH |
1126 | exit_generic: |
1127 | usb_deregister(&usb_serial_driver); | |
1128 | ||
1da177e4 LT |
1129 | exit_tty: |
1130 | tty_unregister_driver(usb_serial_tty_driver); | |
1131 | ||
1132 | exit_reg_driver: | |
1da177e4 LT |
1133 | bus_unregister(&usb_serial_bus_type); |
1134 | ||
1135 | exit_bus: | |
441b62c1 | 1136 | err ("%s - returning with error %d", __func__, result); |
1da177e4 LT |
1137 | put_tty_driver(usb_serial_tty_driver); |
1138 | return result; | |
1139 | } | |
1140 | ||
1141 | ||
1142 | static void __exit usb_serial_exit(void) | |
1143 | { | |
1144 | usb_serial_console_exit(); | |
1145 | ||
1146 | usb_serial_generic_deregister(); | |
1147 | ||
1148 | usb_deregister(&usb_serial_driver); | |
1149 | tty_unregister_driver(usb_serial_tty_driver); | |
1150 | put_tty_driver(usb_serial_tty_driver); | |
1151 | bus_unregister(&usb_serial_bus_type); | |
1152 | } | |
1153 | ||
1154 | ||
1155 | module_init(usb_serial_init); | |
1156 | module_exit(usb_serial_exit); | |
1157 | ||
1158 | #define set_to_generic_if_null(type, function) \ | |
1159 | do { \ | |
1160 | if (!type->function) { \ | |
1161 | type->function = usb_serial_generic_##function; \ | |
1162 | dbg("Had to override the " #function \ | |
1163 | " usb serial operation with the generic one.");\ | |
1164 | } \ | |
1165 | } while (0) | |
1166 | ||
ea65370d | 1167 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1168 | { |
1169 | set_to_generic_if_null(device, open); | |
1170 | set_to_generic_if_null(device, write); | |
1171 | set_to_generic_if_null(device, close); | |
1172 | set_to_generic_if_null(device, write_room); | |
1173 | set_to_generic_if_null(device, chars_in_buffer); | |
1174 | set_to_generic_if_null(device, read_bulk_callback); | |
1175 | set_to_generic_if_null(device, write_bulk_callback); | |
1176 | set_to_generic_if_null(device, shutdown); | |
f0fbd5b9 | 1177 | set_to_generic_if_null(device, resume); |
1da177e4 LT |
1178 | } |
1179 | ||
4b10f0f3 | 1180 | int usb_serial_register(struct usb_serial_driver *driver) /* must be called with BKL held */ |
1da177e4 LT |
1181 | { |
1182 | int retval; | |
1183 | ||
ea65370d | 1184 | fixup_generic(driver); |
1da177e4 | 1185 | |
269bda1c GKH |
1186 | if (!driver->description) |
1187 | driver->description = driver->driver.name; | |
1188 | ||
1da177e4 | 1189 | /* Add this device to our list of devices */ |
ea65370d | 1190 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1191 | |
ea65370d | 1192 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1193 | if (retval) { |
269bda1c | 1194 | err("problem %d when registering driver %s", retval, driver->description); |
ea65370d | 1195 | list_del(&driver->driver_list); |
1da177e4 LT |
1196 | } |
1197 | else | |
269bda1c | 1198 | info("USB Serial support registered for %s", driver->description); |
1da177e4 LT |
1199 | |
1200 | return retval; | |
1201 | } | |
1202 | ||
1203 | ||
4b10f0f3 | 1204 | void usb_serial_deregister(struct usb_serial_driver *device) /* must be called with BKL held */ |
1da177e4 | 1205 | { |
269bda1c | 1206 | info("USB Serial deregistering driver %s", device->description); |
1da177e4 LT |
1207 | list_del(&device->driver_list); |
1208 | usb_serial_bus_deregister(device); | |
1209 | } | |
1210 | ||
1211 | ||
1212 | ||
1213 | /* If the usb-serial core is built into the core, the usb-serial drivers | |
1214 | need these symbols to load properly as modules. */ | |
1215 | EXPORT_SYMBOL_GPL(usb_serial_register); | |
1216 | EXPORT_SYMBOL_GPL(usb_serial_deregister); | |
1217 | EXPORT_SYMBOL_GPL(usb_serial_probe); | |
1218 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); | |
1219 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); | |
1220 | ||
1221 | ||
1222 | /* Module information */ | |
1223 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1224 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1da177e4 LT |
1225 | MODULE_LICENSE("GPL"); |
1226 | ||
1227 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1228 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |