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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 | * | |
a8d6f0a9 AC |
15 | * See Documentation/usb/usb-serial.txt for more information on using this |
16 | * driver | |
1da177e4 | 17 | * |
1da177e4 LT |
18 | */ |
19 | ||
1da177e4 LT |
20 | #include <linux/kernel.h> |
21 | #include <linux/errno.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/tty.h> | |
25 | #include <linux/tty_driver.h> | |
26 | #include <linux/tty_flip.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/moduleparam.h> | |
6fd69d3c | 29 | #include <linux/seq_file.h> |
1da177e4 | 30 | #include <linux/spinlock.h> |
1ce7dd26 | 31 | #include <linux/mutex.h> |
1da177e4 | 32 | #include <linux/list.h> |
a8d6f0a9 | 33 | #include <linux/uaccess.h> |
c56d3000 | 34 | #include <linux/serial.h> |
1da177e4 | 35 | #include <linux/usb.h> |
a969888c | 36 | #include <linux/usb/serial.h> |
8e8dce06 | 37 | #include <linux/kfifo.h> |
1da177e4 LT |
38 | #include "pl2303.h" |
39 | ||
40 | /* | |
41 | * Version Information | |
42 | */ | |
1da177e4 LT |
43 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
44 | #define DRIVER_DESC "USB Serial Driver core" | |
45 | ||
1da177e4 LT |
46 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead |
47 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
48 | cause the "hotplug" program to pull in whatever module is necessary | |
49 | via modprobe, and modprobe will load usbserial because the serial | |
50 | drivers depend on it. | |
51 | */ | |
52 | ||
90ab5ee9 | 53 | static bool debug; |
a8d6f0a9 AC |
54 | /* initially all NULL */ |
55 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; | |
3ddad823 | 56 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
57 | static LIST_HEAD(usb_serial_driver_list); |
58 | ||
8bc2c1b2 AS |
59 | /* |
60 | * Look up the serial structure. If it is found and it hasn't been | |
61 | * disconnected, return with its disc_mutex held and its refcount | |
62 | * incremented. Otherwise return NULL. | |
63 | */ | |
1da177e4 LT |
64 | struct usb_serial *usb_serial_get_by_index(unsigned index) |
65 | { | |
34ef50e5 ON |
66 | struct usb_serial *serial; |
67 | ||
3ddad823 | 68 | mutex_lock(&table_lock); |
34ef50e5 | 69 | serial = serial_table[index]; |
1da177e4 | 70 | |
8bc2c1b2 AS |
71 | if (serial) { |
72 | mutex_lock(&serial->disc_mutex); | |
73 | if (serial->disconnected) { | |
74 | mutex_unlock(&serial->disc_mutex); | |
75 | serial = NULL; | |
76 | } else { | |
77 | kref_get(&serial->kref); | |
78 | } | |
79 | } | |
3ddad823 | 80 | mutex_unlock(&table_lock); |
1da177e4 LT |
81 | return serial; |
82 | } | |
83 | ||
a8d6f0a9 AC |
84 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
85 | int num_ports, unsigned int *minor) | |
1da177e4 LT |
86 | { |
87 | unsigned int i, j; | |
88 | int good_spot; | |
89 | ||
441b62c1 | 90 | dbg("%s %d", __func__, num_ports); |
1da177e4 LT |
91 | |
92 | *minor = 0; | |
3ddad823 | 93 | mutex_lock(&table_lock); |
1da177e4 LT |
94 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
95 | if (serial_table[i]) | |
96 | continue; | |
97 | ||
98 | good_spot = 1; | |
99 | for (j = 1; j <= num_ports-1; ++j) | |
100 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
101 | good_spot = 0; | |
102 | i += j; | |
103 | break; | |
104 | } | |
105 | if (good_spot == 0) | |
106 | continue; | |
107 | ||
108 | *minor = i; | |
a1f721c8 | 109 | j = 0; |
441b62c1 | 110 | dbg("%s - minor base = %d", __func__, *minor); |
a1f721c8 | 111 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 112 | serial_table[i] = serial; |
a1f721c8 ON |
113 | serial->port[j++]->number = i; |
114 | } | |
3ddad823 | 115 | mutex_unlock(&table_lock); |
1da177e4 LT |
116 | return serial; |
117 | } | |
3ddad823 | 118 | mutex_unlock(&table_lock); |
1da177e4 LT |
119 | return NULL; |
120 | } | |
121 | ||
122 | static void return_serial(struct usb_serial *serial) | |
123 | { | |
124 | int i; | |
125 | ||
441b62c1 | 126 | dbg("%s", __func__); |
1da177e4 | 127 | |
8bc2c1b2 | 128 | mutex_lock(&table_lock); |
a8d6f0a9 | 129 | for (i = 0; i < serial->num_ports; ++i) |
1da177e4 | 130 | serial_table[serial->minor + i] = NULL; |
8bc2c1b2 | 131 | mutex_unlock(&table_lock); |
1da177e4 LT |
132 | } |
133 | ||
134 | static void destroy_serial(struct kref *kref) | |
135 | { | |
136 | struct usb_serial *serial; | |
137 | struct usb_serial_port *port; | |
138 | int i; | |
139 | ||
140 | serial = to_usb_serial(kref); | |
141 | ||
441b62c1 | 142 | dbg("%s - %s", __func__, serial->type->description); |
1da177e4 | 143 | |
521b85ae | 144 | /* return the minor range that this device had */ |
0282b7f2 AS |
145 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
146 | return_serial(serial); | |
521b85ae | 147 | |
a4720c65 AS |
148 | if (serial->attached) |
149 | serial->type->release(serial); | |
f9c99bb8 | 150 | |
41bd34dd AS |
151 | /* Now that nothing is using the ports, they can be freed */ |
152 | for (i = 0; i < serial->num_port_pointers; ++i) { | |
f9c99bb8 | 153 | port = serial->port[i]; |
41bd34dd AS |
154 | if (port) { |
155 | port->serial = NULL; | |
f9c99bb8 | 156 | put_device(&port->dev); |
1da177e4 LT |
157 | } |
158 | } | |
159 | ||
160 | usb_put_dev(serial->dev); | |
a8d6f0a9 | 161 | kfree(serial); |
1da177e4 LT |
162 | } |
163 | ||
73e487fd GL |
164 | void usb_serial_put(struct usb_serial *serial) |
165 | { | |
166 | kref_put(&serial->kref, destroy_serial); | |
167 | } | |
168 | ||
1da177e4 LT |
169 | /***************************************************************************** |
170 | * Driver tty interface functions | |
171 | *****************************************************************************/ | |
f5b0953a AS |
172 | |
173 | /** | |
174 | * serial_install - install tty | |
175 | * @driver: the driver (USB in our case) | |
176 | * @tty: the tty being created | |
177 | * | |
178 | * Create the termios objects for this tty. We use the default | |
179 | * USB serial settings but permit them to be overridden by | |
180 | * serial->type->init_termios. | |
cc56cd01 AS |
181 | * |
182 | * This is the first place a new tty gets used. Hence this is where we | |
183 | * acquire references to the usb_serial structure and the driver module, | |
184 | * where we store a pointer to the port, and where we do an autoresume. | |
f278a2f7 | 185 | * All these actions are reversed in serial_cleanup(). |
f5b0953a AS |
186 | */ |
187 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) | |
188 | { | |
189 | int idx = tty->index; | |
190 | struct usb_serial *serial; | |
cc56cd01 AS |
191 | struct usb_serial_port *port; |
192 | int retval = -ENODEV; | |
193 | ||
ff8324df AS |
194 | dbg("%s", __func__); |
195 | ||
cc56cd01 AS |
196 | serial = usb_serial_get_by_index(idx); |
197 | if (!serial) | |
198 | return retval; | |
199 | ||
200 | port = serial->port[idx - serial->minor]; | |
201 | if (!port) | |
202 | goto error_no_port; | |
203 | if (!try_module_get(serial->type->driver.owner)) | |
204 | goto error_module_get; | |
205 | ||
206 | retval = usb_autopm_get_interface(serial->interface); | |
207 | if (retval) | |
208 | goto error_get_interface; | |
f5b0953a | 209 | |
76f82a7a JS |
210 | retval = tty_standard_install(driver, tty); |
211 | if (retval) | |
212 | goto error_init_termios; | |
213 | ||
cc56cd01 AS |
214 | mutex_unlock(&serial->disc_mutex); |
215 | ||
7e29bb4b AS |
216 | /* allow the driver to update the settings */ |
217 | if (serial->type->init_termios) | |
218 | serial->type->init_termios(tty); | |
219 | ||
cc56cd01 AS |
220 | tty->driver_data = port; |
221 | ||
cc56cd01 AS |
222 | return retval; |
223 | ||
7e29bb4b | 224 | error_init_termios: |
76f82a7a JS |
225 | usb_autopm_put_interface(serial->interface); |
226 | error_get_interface: | |
cc56cd01 AS |
227 | module_put(serial->type->driver.owner); |
228 | error_module_get: | |
229 | error_no_port: | |
230 | usb_serial_put(serial); | |
231 | mutex_unlock(&serial->disc_mutex); | |
232 | return retval; | |
f5b0953a AS |
233 | } |
234 | ||
64bc3979 | 235 | static int serial_activate(struct tty_port *tport, struct tty_struct *tty) |
1da177e4 | 236 | { |
64bc3979 AC |
237 | struct usb_serial_port *port = |
238 | container_of(tport, struct usb_serial_port, port); | |
320348c8 AS |
239 | struct usb_serial *serial = port->serial; |
240 | int retval; | |
331879fd | 241 | |
64bc3979 AC |
242 | mutex_lock(&serial->disc_mutex); |
243 | if (serial->disconnected) | |
244 | retval = -ENODEV; | |
245 | else | |
246 | retval = port->serial->type->open(tty, port); | |
247 | mutex_unlock(&serial->disc_mutex); | |
3827d876 JH |
248 | |
249 | if (retval < 0) | |
250 | retval = usb_translate_errors(retval); | |
251 | ||
64bc3979 AC |
252 | return retval; |
253 | } | |
1da177e4 | 254 | |
64bc3979 AC |
255 | static int serial_open(struct tty_struct *tty, struct file *filp) |
256 | { | |
257 | struct usb_serial_port *port = tty->driver_data; | |
320348c8 | 258 | |
64bc3979 AC |
259 | dbg("%s - port %d", __func__, port->number); |
260 | return tty_port_open(&port->port, tty, filp); | |
1da177e4 LT |
261 | } |
262 | ||
335f8514 | 263 | /** |
74556123 | 264 | * serial_down - shut down hardware |
e1108a63 | 265 | * @tport: tty port to shut down |
335f8514 | 266 | * |
f5b0953a | 267 | * Shut down a USB serial port unless it is the console. We never |
e1108a63 AC |
268 | * shut down the console hardware as it will always be in use. Serialized |
269 | * against activate by the tport mutex and kept to matching open/close pairs | |
270 | * of calls by the ASYNCB_INITIALIZED flag. | |
335f8514 | 271 | */ |
e1108a63 | 272 | static void serial_down(struct tty_port *tport) |
1da177e4 | 273 | { |
e1108a63 AC |
274 | struct usb_serial_port *port = |
275 | container_of(tport, struct usb_serial_port, port); | |
335f8514 | 276 | struct usb_serial_driver *drv = port->serial->type; |
f5b0953a AS |
277 | /* |
278 | * The console is magical. Do not hang up the console hardware | |
279 | * or there will be tears. | |
280 | */ | |
bd5afa9e | 281 | if (port->port.console) |
1da177e4 | 282 | return; |
335f8514 AC |
283 | if (drv->close) |
284 | drv->close(port); | |
335f8514 AC |
285 | } |
286 | ||
f5b0953a AS |
287 | static void serial_hangup(struct tty_struct *tty) |
288 | { | |
289 | struct usb_serial_port *port = tty->driver_data; | |
ff8324df | 290 | dbg("%s - port %d", __func__, port->number); |
f5b0953a | 291 | tty_port_hangup(&port->port); |
f5b0953a AS |
292 | } |
293 | ||
294 | static void serial_close(struct tty_struct *tty, struct file *filp) | |
295 | { | |
296 | struct usb_serial_port *port = tty->driver_data; | |
f5b0953a | 297 | dbg("%s - port %d", __func__, port->number); |
e1108a63 | 298 | tty_port_close(&port->port, tty, filp); |
f5b0953a AS |
299 | } |
300 | ||
335f8514 | 301 | /** |
f278a2f7 | 302 | * serial_cleanup - free resources post close/hangup |
f5b0953a | 303 | * @port: port to free up |
335f8514 | 304 | * |
f5b0953a AS |
305 | * Do the resource freeing and refcount dropping for the port. |
306 | * Avoid freeing the console. | |
4455e344 | 307 | * |
f278a2f7 DY |
308 | * Called asynchronously after the last tty kref is dropped, |
309 | * and the tty layer has already done the tty_shutdown(tty); | |
335f8514 | 310 | */ |
f278a2f7 | 311 | static void serial_cleanup(struct tty_struct *tty) |
335f8514 | 312 | { |
4455e344 | 313 | struct usb_serial_port *port = tty->driver_data; |
335f8514 AC |
314 | struct usb_serial *serial; |
315 | struct module *owner; | |
316 | ||
f5b0953a AS |
317 | /* The console is magical. Do not hang up the console hardware |
318 | * or there will be tears. | |
319 | */ | |
bd5afa9e | 320 | if (port->port.console) |
335f8514 AC |
321 | return; |
322 | ||
ff8324df AS |
323 | dbg("%s - port %d", __func__, port->number); |
324 | ||
cc56cd01 AS |
325 | tty->driver_data = NULL; |
326 | ||
335f8514 AC |
327 | serial = port->serial; |
328 | owner = serial->type->driver.owner; | |
41bd34dd | 329 | |
335f8514 AC |
330 | mutex_lock(&serial->disc_mutex); |
331 | if (!serial->disconnected) | |
332 | usb_autopm_put_interface(serial->interface); | |
333 | mutex_unlock(&serial->disc_mutex); | |
41bd34dd | 334 | |
2d93148a | 335 | usb_serial_put(serial); |
335f8514 AC |
336 | module_put(owner); |
337 | } | |
338 | ||
a8d6f0a9 AC |
339 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
340 | int count) | |
1da177e4 | 341 | { |
81671ddb | 342 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 343 | int retval = -ENODEV; |
1da177e4 | 344 | |
f34d7a5b | 345 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
346 | goto exit; |
347 | ||
441b62c1 | 348 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
1da177e4 | 349 | |
1da177e4 | 350 | /* pass on to the driver specific version of this function */ |
95da310e | 351 | retval = port->serial->type->write(tty, port, buf, count); |
c6249ff7 JH |
352 | if (retval < 0) |
353 | retval = usb_translate_errors(retval); | |
1da177e4 LT |
354 | exit: |
355 | return retval; | |
356 | } | |
357 | ||
a8d6f0a9 | 358 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 359 | { |
81671ddb | 360 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 361 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 362 | /* pass on to the driver specific version of this function */ |
95da310e | 363 | return port->serial->type->write_room(tty); |
1da177e4 LT |
364 | } |
365 | ||
a8d6f0a9 | 366 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 367 | { |
81671ddb | 368 | struct usb_serial_port *port = tty->driver_data; |
b4fc2aee | 369 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 370 | |
eff6937a AC |
371 | /* if the device was unplugged then any remaining characters |
372 | fell out of the connector ;) */ | |
373 | if (port->serial->disconnected) | |
374 | return 0; | |
1da177e4 | 375 | /* pass on to the driver specific version of this function */ |
95da310e | 376 | return port->serial->type->chars_in_buffer(tty); |
1da177e4 LT |
377 | } |
378 | ||
a8d6f0a9 | 379 | static void serial_throttle(struct tty_struct *tty) |
1da177e4 | 380 | { |
81671ddb | 381 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 382 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 383 | |
1da177e4 LT |
384 | /* pass on to the driver specific version of this function */ |
385 | if (port->serial->type->throttle) | |
95da310e | 386 | port->serial->type->throttle(tty); |
1da177e4 LT |
387 | } |
388 | ||
a8d6f0a9 | 389 | static void serial_unthrottle(struct tty_struct *tty) |
1da177e4 | 390 | { |
81671ddb | 391 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 392 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 393 | |
1da177e4 LT |
394 | /* pass on to the driver specific version of this function */ |
395 | if (port->serial->type->unthrottle) | |
95da310e | 396 | port->serial->type->unthrottle(tty); |
1da177e4 LT |
397 | } |
398 | ||
6caa76b7 | 399 | static int serial_ioctl(struct tty_struct *tty, |
a8d6f0a9 | 400 | unsigned int cmd, unsigned long arg) |
1da177e4 | 401 | { |
81671ddb | 402 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
403 | int retval = -ENODEV; |
404 | ||
441b62c1 | 405 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 | 406 | |
a8d6f0a9 AC |
407 | /* pass on to the driver specific version of this function |
408 | if it is available */ | |
f34d7a5b | 409 | if (port->serial->type->ioctl) { |
00a0d0d6 | 410 | retval = port->serial->type->ioctl(tty, cmd, arg); |
a8d6f0a9 | 411 | } else |
1da177e4 | 412 | retval = -ENOIOCTLCMD; |
1da177e4 LT |
413 | return retval; |
414 | } | |
415 | ||
a8d6f0a9 | 416 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 417 | { |
81671ddb | 418 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 419 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 420 | |
a8d6f0a9 AC |
421 | /* pass on to the driver specific version of this function |
422 | if it is available */ | |
1da177e4 | 423 | if (port->serial->type->set_termios) |
95da310e | 424 | port->serial->type->set_termios(tty, port, old); |
33785091 AC |
425 | else |
426 | tty_termios_copy_hw(tty->termios, old); | |
1da177e4 LT |
427 | } |
428 | ||
9e98966c | 429 | static int serial_break(struct tty_struct *tty, int break_state) |
1da177e4 | 430 | { |
81671ddb | 431 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 432 | |
441b62c1 | 433 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 434 | |
a8d6f0a9 AC |
435 | /* pass on to the driver specific version of this function |
436 | if it is available */ | |
6b447f04 | 437 | if (port->serial->type->break_ctl) |
95da310e | 438 | port->serial->type->break_ctl(tty, break_state); |
9e98966c | 439 | return 0; |
1da177e4 LT |
440 | } |
441 | ||
6fd69d3c | 442 | static int serial_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
443 | { |
444 | struct usb_serial *serial; | |
1da177e4 | 445 | int i; |
1da177e4 LT |
446 | char tmp[40]; |
447 | ||
441b62c1 | 448 | dbg("%s", __func__); |
6fd69d3c AD |
449 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
450 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1da177e4 LT |
451 | serial = usb_serial_get_by_index(i); |
452 | if (serial == NULL) | |
453 | continue; | |
454 | ||
6fd69d3c | 455 | seq_printf(m, "%d:", i); |
18fcac35 | 456 | if (serial->type->driver.owner) |
6fd69d3c | 457 | seq_printf(m, " module:%s", |
a8d6f0a9 | 458 | module_name(serial->type->driver.owner)); |
6fd69d3c | 459 | seq_printf(m, " name:\"%s\"", |
a8d6f0a9 | 460 | serial->type->description); |
6fd69d3c | 461 | seq_printf(m, " vendor:%04x product:%04x", |
a8d6f0a9 AC |
462 | le16_to_cpu(serial->dev->descriptor.idVendor), |
463 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
6fd69d3c AD |
464 | seq_printf(m, " num_ports:%d", serial->num_ports); |
465 | seq_printf(m, " port:%d", i - serial->minor + 1); | |
1da177e4 | 466 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
6fd69d3c | 467 | seq_printf(m, " path:%s", tmp); |
a8d6f0a9 | 468 | |
6fd69d3c | 469 | seq_putc(m, '\n'); |
73e487fd | 470 | usb_serial_put(serial); |
8bc2c1b2 | 471 | mutex_unlock(&serial->disc_mutex); |
1da177e4 | 472 | } |
6fd69d3c | 473 | return 0; |
1da177e4 LT |
474 | } |
475 | ||
6fd69d3c AD |
476 | static int serial_proc_open(struct inode *inode, struct file *file) |
477 | { | |
478 | return single_open(file, serial_proc_show, NULL); | |
479 | } | |
480 | ||
481 | static const struct file_operations serial_proc_fops = { | |
482 | .owner = THIS_MODULE, | |
483 | .open = serial_proc_open, | |
484 | .read = seq_read, | |
485 | .llseek = seq_lseek, | |
486 | .release = single_release, | |
487 | }; | |
488 | ||
60b33c13 | 489 | static int serial_tiocmget(struct tty_struct *tty) |
1da177e4 | 490 | { |
81671ddb | 491 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 492 | |
441b62c1 | 493 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 494 | |
1da177e4 | 495 | if (port->serial->type->tiocmget) |
60b33c13 | 496 | return port->serial->type->tiocmget(tty); |
1da177e4 LT |
497 | return -EINVAL; |
498 | } | |
499 | ||
20b9d177 | 500 | static int serial_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
501 | unsigned int set, unsigned int clear) |
502 | { | |
81671ddb | 503 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 504 | |
441b62c1 | 505 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 506 | |
1da177e4 | 507 | if (port->serial->type->tiocmset) |
20b9d177 | 508 | return port->serial->type->tiocmset(tty, set, clear); |
1da177e4 LT |
509 | return -EINVAL; |
510 | } | |
511 | ||
d281da7f AC |
512 | static int serial_get_icount(struct tty_struct *tty, |
513 | struct serial_icounter_struct *icount) | |
514 | { | |
515 | struct usb_serial_port *port = tty->driver_data; | |
516 | ||
517 | dbg("%s - port %d", __func__, port->number); | |
518 | ||
519 | if (port->serial->type->get_icount) | |
520 | return port->serial->type->get_icount(tty, icount); | |
521 | return -EINVAL; | |
522 | } | |
523 | ||
cf2c7481 PZ |
524 | /* |
525 | * We would be calling tty_wakeup here, but unfortunately some line | |
526 | * disciplines have an annoying habit of calling tty->write from | |
527 | * the write wakeup callback (e.g. n_hdlc.c). | |
528 | */ | |
529 | void usb_serial_port_softint(struct usb_serial_port *port) | |
530 | { | |
531 | schedule_work(&port->work); | |
532 | } | |
a8d6f0a9 | 533 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
cf2c7481 | 534 | |
c4028958 | 535 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 536 | { |
c4028958 DH |
537 | struct usb_serial_port *port = |
538 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
539 | struct tty_struct *tty; |
540 | ||
441b62c1 | 541 | dbg("%s - port %d", __func__, port->number); |
a8d6f0a9 | 542 | |
4a90f09b | 543 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
544 | if (!tty) |
545 | return; | |
546 | ||
547 | tty_wakeup(tty); | |
4a90f09b | 548 | tty_kref_put(tty); |
1da177e4 LT |
549 | } |
550 | ||
34ef50e5 | 551 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 552 | { |
27c7acf2 JH |
553 | int i; |
554 | ||
d83b4053 JH |
555 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
556 | usb_kill_urb(port->read_urbs[i]); | |
27c7acf2 JH |
557 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
558 | usb_kill_urb(port->write_urbs[i]); | |
5adceac5 ON |
559 | /* |
560 | * This is tricky. | |
561 | * Some drivers submit the read_urb in the | |
562 | * handler for the write_urb or vice versa | |
563 | * this order determines the order in which | |
564 | * usb_kill_urb() must be used to reliably | |
565 | * kill the URBs. As it is unknown here, | |
566 | * both orders must be used in turn. | |
567 | * The call below is not redundant. | |
568 | */ | |
569 | usb_kill_urb(port->read_urb); | |
1da177e4 | 570 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 571 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
572 | } |
573 | ||
41bd34dd | 574 | static void port_release(struct device *dev) |
34ef50e5 | 575 | { |
41bd34dd | 576 | struct usb_serial_port *port = to_usb_serial_port(dev); |
27c7acf2 | 577 | int i; |
41bd34dd AS |
578 | |
579 | dbg ("%s - %s", __func__, dev_name(dev)); | |
580 | ||
2d93148a AS |
581 | /* |
582 | * Stop all the traffic before cancelling the work, so that | |
583 | * nobody will restart it by calling usb_serial_port_softint. | |
584 | */ | |
34ef50e5 | 585 | kill_traffic(port); |
2d93148a AS |
586 | cancel_work_sync(&port->work); |
587 | ||
34ef50e5 | 588 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 | 589 | usb_free_urb(port->interrupt_out_urb); |
d83b4053 JH |
590 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
591 | usb_free_urb(port->read_urbs[i]); | |
592 | kfree(port->bulk_in_buffers[i]); | |
593 | } | |
27c7acf2 JH |
594 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) { |
595 | usb_free_urb(port->write_urbs[i]); | |
596 | kfree(port->bulk_out_buffers[i]); | |
597 | } | |
119eecc8 | 598 | kfifo_free(&port->write_fifo); |
1da177e4 LT |
599 | kfree(port->interrupt_in_buffer); |
600 | kfree(port->interrupt_out_buffer); | |
601 | kfree(port); | |
602 | } | |
603 | ||
a8d6f0a9 AC |
604 | static struct usb_serial *create_serial(struct usb_device *dev, |
605 | struct usb_interface *interface, | |
606 | struct usb_serial_driver *driver) | |
1da177e4 LT |
607 | { |
608 | struct usb_serial *serial; | |
609 | ||
80b6ca48 | 610 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 611 | if (!serial) { |
441b62c1 | 612 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
613 | return NULL; |
614 | } | |
1da177e4 | 615 | serial->dev = usb_get_dev(dev); |
ea65370d | 616 | serial->type = driver; |
1da177e4 LT |
617 | serial->interface = interface; |
618 | kref_init(&serial->kref); | |
a1cd7e99 | 619 | mutex_init(&serial->disc_mutex); |
0282b7f2 | 620 | serial->minor = SERIAL_TTY_NO_MINOR; |
1da177e4 LT |
621 | |
622 | return serial; | |
623 | } | |
624 | ||
93bacefc | 625 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 626 | struct usb_serial_driver *drv) |
93bacefc GKH |
627 | { |
628 | struct usb_dynid *dynid; | |
629 | ||
630 | spin_lock(&drv->dynids.lock); | |
631 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
632 | if (usb_match_one_id(intf, &dynid->id)) { | |
633 | spin_unlock(&drv->dynids.lock); | |
634 | return &dynid->id; | |
635 | } | |
636 | } | |
637 | spin_unlock(&drv->dynids.lock); | |
638 | return NULL; | |
639 | } | |
640 | ||
641 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
642 | struct usb_interface *intf) | |
643 | { | |
644 | const struct usb_device_id *id; | |
645 | ||
646 | id = usb_match_id(intf, drv->id_table); | |
647 | if (id) { | |
648 | dbg("static descriptor matches"); | |
649 | goto exit; | |
650 | } | |
651 | id = match_dynamic_id(intf, drv); | |
652 | if (id) | |
653 | dbg("dynamic descriptor matches"); | |
654 | exit: | |
655 | return id; | |
656 | } | |
657 | ||
0daeed38 | 658 | /* Caller must hold table_lock */ |
a8d6f0a9 AC |
659 | static struct usb_serial_driver *search_serial_device( |
660 | struct usb_interface *iface) | |
1da177e4 | 661 | { |
1da177e4 | 662 | const struct usb_device_id *id; |
063a2da8 | 663 | struct usb_serial_driver *drv; |
1da177e4 | 664 | |
93b1fae4 | 665 | /* Check if the usb id matches a known device */ |
063a2da8 AS |
666 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
667 | id = get_iface_id(drv, iface); | |
93bacefc | 668 | if (id) |
063a2da8 | 669 | return drv; |
1da177e4 LT |
670 | } |
671 | ||
672 | return NULL; | |
673 | } | |
674 | ||
335f8514 AC |
675 | static int serial_carrier_raised(struct tty_port *port) |
676 | { | |
677 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
678 | struct usb_serial_driver *drv = p->serial->type; | |
3e1f4901 | 679 | |
335f8514 AC |
680 | if (drv->carrier_raised) |
681 | return drv->carrier_raised(p); | |
682 | /* No carrier control - don't block */ | |
3e1f4901 | 683 | return 1; |
335f8514 AC |
684 | } |
685 | ||
686 | static void serial_dtr_rts(struct tty_port *port, int on) | |
687 | { | |
688 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
689 | struct usb_serial_driver *drv = p->serial->type; | |
3e1f4901 | 690 | |
335f8514 AC |
691 | if (drv->dtr_rts) |
692 | drv->dtr_rts(p, on); | |
693 | } | |
694 | ||
695 | static const struct tty_port_operations serial_port_ops = { | |
696 | .carrier_raised = serial_carrier_raised, | |
697 | .dtr_rts = serial_dtr_rts, | |
64bc3979 | 698 | .activate = serial_activate, |
e1108a63 | 699 | .shutdown = serial_down, |
335f8514 AC |
700 | }; |
701 | ||
2edd284b | 702 | static int usb_serial_probe(struct usb_interface *interface, |
1da177e4 LT |
703 | const struct usb_device_id *id) |
704 | { | |
a8d6f0a9 | 705 | struct usb_device *dev = interface_to_usbdev(interface); |
1da177e4 LT |
706 | struct usb_serial *serial = NULL; |
707 | struct usb_serial_port *port; | |
708 | struct usb_host_interface *iface_desc; | |
709 | struct usb_endpoint_descriptor *endpoint; | |
710 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
711 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
712 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
713 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 714 | struct usb_serial_driver *type = NULL; |
1da177e4 | 715 | int retval; |
dd9ca5d9 | 716 | unsigned int minor; |
1da177e4 LT |
717 | int buffer_size; |
718 | int i; | |
d83b4053 | 719 | int j; |
1da177e4 LT |
720 | int num_interrupt_in = 0; |
721 | int num_interrupt_out = 0; | |
722 | int num_bulk_in = 0; | |
723 | int num_bulk_out = 0; | |
724 | int num_ports = 0; | |
725 | int max_endpoints; | |
726 | ||
0daeed38 | 727 | mutex_lock(&table_lock); |
1da177e4 LT |
728 | type = search_serial_device(interface); |
729 | if (!type) { | |
0daeed38 | 730 | mutex_unlock(&table_lock); |
1da177e4 LT |
731 | dbg("none matched"); |
732 | return -ENODEV; | |
733 | } | |
734 | ||
0daeed38 AK |
735 | if (!try_module_get(type->driver.owner)) { |
736 | mutex_unlock(&table_lock); | |
737 | dev_err(&interface->dev, "module get failed, exiting\n"); | |
738 | return -EIO; | |
739 | } | |
740 | mutex_unlock(&table_lock); | |
741 | ||
a8d6f0a9 | 742 | serial = create_serial(dev, interface, type); |
1da177e4 | 743 | if (!serial) { |
d92a3ca6 | 744 | module_put(type->driver.owner); |
441b62c1 | 745 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
746 | return -ENOMEM; |
747 | } | |
748 | ||
749 | /* if this device type has a probe function, call it */ | |
750 | if (type->probe) { | |
751 | const struct usb_device_id *id; | |
752 | ||
93bacefc | 753 | id = get_iface_id(type, interface); |
1da177e4 | 754 | retval = type->probe(serial, id); |
1da177e4 LT |
755 | |
756 | if (retval) { | |
a8d6f0a9 AC |
757 | dbg("sub driver rejected device"); |
758 | kfree(serial); | |
d92a3ca6 | 759 | module_put(type->driver.owner); |
1da177e4 LT |
760 | return retval; |
761 | } | |
762 | } | |
763 | ||
764 | /* descriptor matches, let's find the endpoints needed */ | |
765 | /* check out the endpoints */ | |
766 | iface_desc = interface->cur_altsetting; | |
767 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
768 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
769 | |
770 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
771 | /* we found a bulk in endpoint */ |
772 | dbg("found bulk in on endpoint %d", i); | |
773 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
774 | ++num_bulk_in; | |
775 | } | |
776 | ||
4fa1bbf5 | 777 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
778 | /* we found a bulk out endpoint */ |
779 | dbg("found bulk out on endpoint %d", i); | |
780 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
781 | ++num_bulk_out; | |
782 | } | |
4fa1bbf5 LFC |
783 | |
784 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
785 | /* we found a interrupt in endpoint */ |
786 | dbg("found interrupt in on endpoint %d", i); | |
787 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
788 | ++num_interrupt_in; | |
789 | } | |
790 | ||
4fa1bbf5 | 791 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
792 | /* we found an interrupt out endpoint */ |
793 | dbg("found interrupt out on endpoint %d", i); | |
794 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
795 | ++num_interrupt_out; | |
796 | } | |
797 | } | |
798 | ||
799 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
a8d6f0a9 | 800 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
1da177e4 LT |
801 | /* this is needed due to the looney way its endpoints are set up */ |
802 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
803 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
804 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
805 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
806 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
ce816cf9 AB |
807 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
808 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && | |
809 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { | |
1da177e4 LT |
810 | if (interface != dev->actconfig->interface[0]) { |
811 | /* check out the endpoints of the other interface*/ | |
812 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
813 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
814 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 815 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
816 | /* we found a interrupt in endpoint */ |
817 | dbg("found interrupt in for Prolific device on separate interface"); | |
818 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
819 | ++num_interrupt_in; | |
820 | } | |
821 | } | |
822 | } | |
823 | ||
824 | /* Now make sure the PL-2303 is configured correctly. | |
825 | * If not, give up now and hope this hack will work | |
826 | * properly during a later invocation of usb_serial_probe | |
827 | */ | |
828 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
829 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); | |
a8d6f0a9 | 830 | kfree(serial); |
d92a3ca6 | 831 | module_put(type->driver.owner); |
1da177e4 LT |
832 | return -ENODEV; |
833 | } | |
834 | } | |
835 | /* END HORRIBLE HACK FOR PL2303 */ | |
836 | #endif | |
837 | ||
1da177e4 LT |
838 | #ifdef CONFIG_USB_SERIAL_GENERIC |
839 | if (type == &usb_serial_generic_device) { | |
840 | num_ports = num_bulk_out; | |
841 | if (num_ports == 0) { | |
a8d6f0a9 AC |
842 | dev_err(&interface->dev, |
843 | "Generic device with no bulk out, not allowed.\n"); | |
844 | kfree(serial); | |
d92a3ca6 | 845 | module_put(type->driver.owner); |
1da177e4 LT |
846 | return -EIO; |
847 | } | |
848 | } | |
849 | #endif | |
850 | if (!num_ports) { | |
851 | /* if this device type has a calc_num_ports function, call it */ | |
d92a3ca6 | 852 | if (type->calc_num_ports) |
a8d6f0a9 | 853 | num_ports = type->calc_num_ports(serial); |
1da177e4 LT |
854 | if (!num_ports) |
855 | num_ports = type->num_ports; | |
856 | } | |
857 | ||
1da177e4 LT |
858 | serial->num_ports = num_ports; |
859 | serial->num_bulk_in = num_bulk_in; | |
860 | serial->num_bulk_out = num_bulk_out; | |
861 | serial->num_interrupt_in = num_interrupt_in; | |
862 | serial->num_interrupt_out = num_interrupt_out; | |
863 | ||
063a2da8 AS |
864 | /* found all that we need */ |
865 | dev_info(&interface->dev, "%s converter detected\n", | |
866 | type->description); | |
867 | ||
1da177e4 | 868 | /* create our ports, we need as many as the max endpoints */ |
a8d6f0a9 AC |
869 | /* we don't use num_ports here because some devices have more |
870 | endpoint pairs than ports */ | |
1da177e4 LT |
871 | max_endpoints = max(num_bulk_in, num_bulk_out); |
872 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
873 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
874 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
875 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 | 876 | |
a8d6f0a9 AC |
877 | dbg("%s - setting up %d port structures for this device", |
878 | __func__, max_endpoints); | |
1da177e4 | 879 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 880 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
881 | if (!port) |
882 | goto probe_error; | |
4a90f09b | 883 | tty_port_init(&port->port); |
335f8514 | 884 | port->port.ops = &serial_port_ops; |
1da177e4 | 885 | port->serial = serial; |
507ca9bc | 886 | spin_lock_init(&port->lock); |
e1108a63 AC |
887 | /* Keep this for private driver use for the moment but |
888 | should probably go away */ | |
c4028958 | 889 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 | 890 | serial->port[i] = port; |
41bd34dd AS |
891 | port->dev.parent = &interface->dev; |
892 | port->dev.driver = NULL; | |
893 | port->dev.bus = &usb_serial_bus_type; | |
894 | port->dev.release = &port_release; | |
895 | device_initialize(&port->dev); | |
1da177e4 LT |
896 | } |
897 | ||
898 | /* set up the endpoint information */ | |
899 | for (i = 0; i < num_bulk_in; ++i) { | |
900 | endpoint = bulk_in_endpoint[i]; | |
901 | port = serial->port[i]; | |
969e3033 | 902 | buffer_size = max_t(int, serial->type->bulk_in_size, |
29cc8897 | 903 | usb_endpoint_maxp(endpoint)); |
1da177e4 LT |
904 | port->bulk_in_size = buffer_size; |
905 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
d83b4053 JH |
906 | |
907 | for (j = 0; j < ARRAY_SIZE(port->read_urbs); ++j) { | |
908 | set_bit(j, &port->read_urbs_free); | |
909 | port->read_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); | |
910 | if (!port->read_urbs[j]) { | |
911 | dev_err(&interface->dev, | |
912 | "No free urbs available\n"); | |
913 | goto probe_error; | |
914 | } | |
915 | port->bulk_in_buffers[j] = kmalloc(buffer_size, | |
916 | GFP_KERNEL); | |
917 | if (!port->bulk_in_buffers[j]) { | |
918 | dev_err(&interface->dev, | |
a8d6f0a9 | 919 | "Couldn't allocate bulk_in_buffer\n"); |
d83b4053 JH |
920 | goto probe_error; |
921 | } | |
922 | usb_fill_bulk_urb(port->read_urbs[j], dev, | |
923 | usb_rcvbulkpipe(dev, | |
a8d6f0a9 | 924 | endpoint->bEndpointAddress), |
d83b4053 JH |
925 | port->bulk_in_buffers[j], buffer_size, |
926 | serial->type->read_bulk_callback, | |
927 | port); | |
928 | } | |
929 | ||
930 | port->read_urb = port->read_urbs[0]; | |
931 | port->bulk_in_buffer = port->bulk_in_buffers[0]; | |
1da177e4 LT |
932 | } |
933 | ||
934 | for (i = 0; i < num_bulk_out; ++i) { | |
935 | endpoint = bulk_out_endpoint[i]; | |
936 | port = serial->port[i]; | |
119eecc8 | 937 | if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL)) |
8e8dce06 | 938 | goto probe_error; |
bbcb2b90 JH |
939 | buffer_size = serial->type->bulk_out_size; |
940 | if (!buffer_size) | |
29cc8897 | 941 | buffer_size = usb_endpoint_maxp(endpoint); |
1da177e4 LT |
942 | port->bulk_out_size = buffer_size; |
943 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
1ce7b934 | 944 | |
27c7acf2 JH |
945 | for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) { |
946 | set_bit(j, &port->write_urbs_free); | |
947 | port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); | |
948 | if (!port->write_urbs[j]) { | |
949 | dev_err(&interface->dev, | |
950 | "No free urbs available\n"); | |
951 | goto probe_error; | |
952 | } | |
953 | port->bulk_out_buffers[j] = kmalloc(buffer_size, | |
954 | GFP_KERNEL); | |
955 | if (!port->bulk_out_buffers[j]) { | |
956 | dev_err(&interface->dev, | |
957 | "Couldn't allocate bulk_out_buffer\n"); | |
958 | goto probe_error; | |
959 | } | |
960 | usb_fill_bulk_urb(port->write_urbs[j], dev, | |
961 | usb_sndbulkpipe(dev, | |
962 | endpoint->bEndpointAddress), | |
963 | port->bulk_out_buffers[j], buffer_size, | |
964 | serial->type->write_bulk_callback, | |
965 | port); | |
966 | } | |
1ce7b934 JH |
967 | |
968 | port->write_urb = port->write_urbs[0]; | |
969 | port->bulk_out_buffer = port->bulk_out_buffers[0]; | |
1da177e4 LT |
970 | } |
971 | ||
972 | if (serial->type->read_int_callback) { | |
973 | for (i = 0; i < num_interrupt_in; ++i) { | |
974 | endpoint = interrupt_in_endpoint[i]; | |
975 | port = serial->port[i]; | |
976 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
977 | if (!port->interrupt_in_urb) { | |
a8d6f0a9 AC |
978 | dev_err(&interface->dev, |
979 | "No free urbs available\n"); | |
1da177e4 LT |
980 | goto probe_error; |
981 | } | |
29cc8897 | 982 | buffer_size = usb_endpoint_maxp(endpoint); |
a8d6f0a9 AC |
983 | port->interrupt_in_endpointAddress = |
984 | endpoint->bEndpointAddress; | |
985 | port->interrupt_in_buffer = kmalloc(buffer_size, | |
986 | GFP_KERNEL); | |
1da177e4 | 987 | if (!port->interrupt_in_buffer) { |
a8d6f0a9 AC |
988 | dev_err(&interface->dev, |
989 | "Couldn't allocate interrupt_in_buffer\n"); | |
1da177e4 LT |
990 | goto probe_error; |
991 | } | |
a8d6f0a9 AC |
992 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
993 | usb_rcvintpipe(dev, | |
994 | endpoint->bEndpointAddress), | |
995 | port->interrupt_in_buffer, buffer_size, | |
996 | serial->type->read_int_callback, port, | |
997 | endpoint->bInterval); | |
1da177e4 LT |
998 | } |
999 | } else if (num_interrupt_in) { | |
1000 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
1001 | } | |
a8d6f0a9 | 1002 | |
1da177e4 LT |
1003 | if (serial->type->write_int_callback) { |
1004 | for (i = 0; i < num_interrupt_out; ++i) { | |
1005 | endpoint = interrupt_out_endpoint[i]; | |
1006 | port = serial->port[i]; | |
1007 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1008 | if (!port->interrupt_out_urb) { | |
a8d6f0a9 AC |
1009 | dev_err(&interface->dev, |
1010 | "No free urbs available\n"); | |
1da177e4 LT |
1011 | goto probe_error; |
1012 | } | |
29cc8897 | 1013 | buffer_size = usb_endpoint_maxp(endpoint); |
1da177e4 | 1014 | port->interrupt_out_size = buffer_size; |
a8d6f0a9 AC |
1015 | port->interrupt_out_endpointAddress = |
1016 | endpoint->bEndpointAddress; | |
1017 | port->interrupt_out_buffer = kmalloc(buffer_size, | |
1018 | GFP_KERNEL); | |
1da177e4 | 1019 | if (!port->interrupt_out_buffer) { |
a8d6f0a9 AC |
1020 | dev_err(&interface->dev, |
1021 | "Couldn't allocate interrupt_out_buffer\n"); | |
1da177e4 LT |
1022 | goto probe_error; |
1023 | } | |
a8d6f0a9 AC |
1024 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
1025 | usb_sndintpipe(dev, | |
1026 | endpoint->bEndpointAddress), | |
1027 | port->interrupt_out_buffer, buffer_size, | |
1028 | serial->type->write_int_callback, port, | |
1029 | endpoint->bInterval); | |
1da177e4 LT |
1030 | } |
1031 | } else if (num_interrupt_out) { | |
1032 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
1033 | } | |
a8d6f0a9 | 1034 | |
bdce6612 JH |
1035 | usb_set_intfdata(interface, serial); |
1036 | ||
1da177e4 LT |
1037 | /* if this device type has an attach function, call it */ |
1038 | if (type->attach) { | |
a8d6f0a9 | 1039 | retval = type->attach(serial); |
1da177e4 LT |
1040 | if (retval < 0) |
1041 | goto probe_error; | |
a4720c65 | 1042 | serial->attached = 1; |
1da177e4 | 1043 | if (retval > 0) { |
a8d6f0a9 AC |
1044 | /* quietly accept this device, but don't bind to a |
1045 | serial port as it's about to disappear */ | |
0a3c8549 | 1046 | serial->num_ports = 0; |
1da177e4 LT |
1047 | goto exit; |
1048 | } | |
a4720c65 AS |
1049 | } else { |
1050 | serial->attached = 1; | |
1da177e4 LT |
1051 | } |
1052 | ||
a65a6f14 JH |
1053 | /* Avoid race with tty_open and serial_install by setting the |
1054 | * disconnected flag and not clearing it until all ports have been | |
1055 | * registered. | |
1056 | */ | |
1057 | serial->disconnected = 1; | |
1058 | ||
a8d6f0a9 | 1059 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
34ef50e5 ON |
1060 | dev_err(&interface->dev, "No more free serial devices\n"); |
1061 | goto probe_error; | |
1062 | } | |
c744f99e | 1063 | serial->minor = minor; |
34ef50e5 | 1064 | |
1da177e4 LT |
1065 | /* register all of the individual ports with the driver core */ |
1066 | for (i = 0; i < num_ports; ++i) { | |
1067 | port = serial->port[i]; | |
0031a06e | 1068 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
7071a3ce | 1069 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
a7a6b79b ML |
1070 | device_enable_async_suspend(&port->dev); |
1071 | ||
41bd34dd | 1072 | retval = device_add(&port->dev); |
891a3b1f | 1073 | if (retval) |
13f4db9e GKH |
1074 | dev_err(&port->dev, "Error registering port device, " |
1075 | "continuing\n"); | |
1da177e4 LT |
1076 | } |
1077 | ||
a65a6f14 JH |
1078 | serial->disconnected = 0; |
1079 | ||
a8d6f0a9 | 1080 | usb_serial_console_init(debug, minor); |
1da177e4 | 1081 | exit: |
d92a3ca6 | 1082 | module_put(type->driver.owner); |
1da177e4 LT |
1083 | return 0; |
1084 | ||
1085 | probe_error: | |
41bd34dd | 1086 | usb_serial_put(serial); |
d92a3ca6 | 1087 | module_put(type->driver.owner); |
1da177e4 LT |
1088 | return -EIO; |
1089 | } | |
1090 | ||
32078f91 | 1091 | static void usb_serial_disconnect(struct usb_interface *interface) |
1da177e4 LT |
1092 | { |
1093 | int i; | |
a8d6f0a9 | 1094 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1095 | struct device *dev = &interface->dev; |
1096 | struct usb_serial_port *port; | |
1097 | ||
73e487fd | 1098 | usb_serial_console_disconnect(serial); |
a8d6f0a9 | 1099 | dbg("%s", __func__); |
1da177e4 | 1100 | |
a1cd7e99 | 1101 | mutex_lock(&serial->disc_mutex); |
a1cd7e99 ON |
1102 | /* must set a flag, to signal subdrivers */ |
1103 | serial->disconnected = 1; | |
2d93148a AS |
1104 | mutex_unlock(&serial->disc_mutex); |
1105 | ||
a1cd7e99 ON |
1106 | for (i = 0; i < serial->num_ports; ++i) { |
1107 | port = serial->port[i]; | |
1108 | if (port) { | |
4a90f09b AC |
1109 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1110 | if (tty) { | |
d2b39182 | 1111 | tty_vhangup(tty); |
4a90f09b AC |
1112 | tty_kref_put(tty); |
1113 | } | |
a1cd7e99 | 1114 | kill_traffic(port); |
2d93148a | 1115 | cancel_work_sync(&port->work); |
891a3b1f | 1116 | if (device_is_registered(&port->dev)) |
c706ebdf | 1117 | device_del(&port->dev); |
2d93148a AS |
1118 | } |
1119 | } | |
f9c99bb8 | 1120 | serial->type->disconnect(serial); |
2d93148a | 1121 | |
41bd34dd | 1122 | /* let the last holder of this object cause it to be cleaned up */ |
a1cd7e99 | 1123 | usb_serial_put(serial); |
1da177e4 LT |
1124 | dev_info(dev, "device disconnected\n"); |
1125 | } | |
1126 | ||
ec22559e ON |
1127 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1128 | { | |
1129 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1130 | struct usb_serial_port *port; | |
1131 | int i, r = 0; | |
1132 | ||
f8bece8d ON |
1133 | serial->suspending = 1; |
1134 | ||
81e5b23c ON |
1135 | if (serial->type->suspend) { |
1136 | r = serial->type->suspend(serial, message); | |
a5f6005d ON |
1137 | if (r < 0) { |
1138 | serial->suspending = 0; | |
81e5b23c | 1139 | goto err_out; |
a5f6005d | 1140 | } |
81e5b23c ON |
1141 | } |
1142 | ||
e31c1880 ON |
1143 | for (i = 0; i < serial->num_ports; ++i) { |
1144 | port = serial->port[i]; | |
1145 | if (port) | |
1146 | kill_traffic(port); | |
ec22559e ON |
1147 | } |
1148 | ||
81e5b23c | 1149 | err_out: |
ec22559e ON |
1150 | return r; |
1151 | } | |
1152 | EXPORT_SYMBOL(usb_serial_suspend); | |
1153 | ||
1154 | int usb_serial_resume(struct usb_interface *intf) | |
1155 | { | |
1156 | struct usb_serial *serial = usb_get_intfdata(intf); | |
c49cfa91 | 1157 | int rv; |
ec22559e | 1158 | |
f8bece8d | 1159 | serial->suspending = 0; |
8abaee23 | 1160 | if (serial->type->resume) |
c49cfa91 ON |
1161 | rv = serial->type->resume(serial); |
1162 | else | |
1163 | rv = usb_serial_generic_resume(serial); | |
f8bece8d | 1164 | |
c49cfa91 | 1165 | return rv; |
ec22559e ON |
1166 | } |
1167 | EXPORT_SYMBOL(usb_serial_resume); | |
1168 | ||
b68e31d0 | 1169 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1170 | .open = serial_open, |
1171 | .close = serial_close, | |
1172 | .write = serial_write, | |
3e1f4901 | 1173 | .hangup = serial_hangup, |
1da177e4 LT |
1174 | .write_room = serial_write_room, |
1175 | .ioctl = serial_ioctl, | |
1176 | .set_termios = serial_set_termios, | |
1177 | .throttle = serial_throttle, | |
1178 | .unthrottle = serial_unthrottle, | |
1179 | .break_ctl = serial_break, | |
1180 | .chars_in_buffer = serial_chars_in_buffer, | |
1da177e4 LT |
1181 | .tiocmget = serial_tiocmget, |
1182 | .tiocmset = serial_tiocmset, | |
3e1f4901 JH |
1183 | .get_icount = serial_get_icount, |
1184 | .cleanup = serial_cleanup, | |
1185 | .install = serial_install, | |
6fd69d3c | 1186 | .proc_fops = &serial_proc_fops, |
1da177e4 LT |
1187 | }; |
1188 | ||
335f8514 | 1189 | |
1da177e4 LT |
1190 | struct tty_driver *usb_serial_tty_driver; |
1191 | ||
32078f91 GKH |
1192 | /* Driver structure we register with the USB core */ |
1193 | static struct usb_driver usb_serial_driver = { | |
1194 | .name = "usbserial", | |
1195 | .probe = usb_serial_probe, | |
1196 | .disconnect = usb_serial_disconnect, | |
1197 | .suspend = usb_serial_suspend, | |
1198 | .resume = usb_serial_resume, | |
1199 | .no_dynamic_id = 1, | |
1200 | .supports_autosuspend = 1, | |
1201 | }; | |
1202 | ||
1da177e4 LT |
1203 | static int __init usb_serial_init(void) |
1204 | { | |
1205 | int i; | |
1206 | int result; | |
1207 | ||
1208 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1209 | if (!usb_serial_tty_driver) | |
1210 | return -ENOMEM; | |
1211 | ||
1212 | /* Initialize our global data */ | |
a8d6f0a9 | 1213 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
1da177e4 | 1214 | serial_table[i] = NULL; |
1da177e4 LT |
1215 | |
1216 | result = bus_register(&usb_serial_bus_type); | |
1217 | if (result) { | |
194343d9 GKH |
1218 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
1219 | "failed\n", __func__); | |
1da177e4 LT |
1220 | goto exit_bus; |
1221 | } | |
1222 | ||
1da177e4 | 1223 | usb_serial_tty_driver->driver_name = "usbserial"; |
3e1f4901 | 1224 | usb_serial_tty_driver->name = "ttyUSB"; |
1da177e4 LT |
1225 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; |
1226 | usb_serial_tty_driver->minor_start = 0; | |
1227 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1228 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1229 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1230 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1231 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1232 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1233 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1234 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1235 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1236 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1237 | result = tty_register_driver(usb_serial_tty_driver); | |
1238 | if (result) { | |
194343d9 GKH |
1239 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
1240 | __func__); | |
1da177e4 LT |
1241 | goto exit_reg_driver; |
1242 | } | |
1243 | ||
1244 | /* register the USB driver */ | |
1245 | result = usb_register(&usb_serial_driver); | |
1246 | if (result < 0) { | |
194343d9 GKH |
1247 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
1248 | __func__); | |
1da177e4 LT |
1249 | goto exit_tty; |
1250 | } | |
1251 | ||
06299db3 GKH |
1252 | /* register the generic driver, if we should */ |
1253 | result = usb_serial_generic_register(debug); | |
1254 | if (result < 0) { | |
194343d9 GKH |
1255 | printk(KERN_ERR "usb-serial: %s - registering generic " |
1256 | "driver failed\n", __func__); | |
06299db3 GKH |
1257 | goto exit_generic; |
1258 | } | |
1259 | ||
c197a8db | 1260 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1261 | |
1262 | return result; | |
1263 | ||
06299db3 GKH |
1264 | exit_generic: |
1265 | usb_deregister(&usb_serial_driver); | |
1266 | ||
1da177e4 LT |
1267 | exit_tty: |
1268 | tty_unregister_driver(usb_serial_tty_driver); | |
1269 | ||
1270 | exit_reg_driver: | |
1da177e4 LT |
1271 | bus_unregister(&usb_serial_bus_type); |
1272 | ||
1273 | exit_bus: | |
194343d9 GKH |
1274 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
1275 | __func__, result); | |
1da177e4 LT |
1276 | put_tty_driver(usb_serial_tty_driver); |
1277 | return result; | |
1278 | } | |
1279 | ||
1280 | ||
1281 | static void __exit usb_serial_exit(void) | |
1282 | { | |
1283 | usb_serial_console_exit(); | |
1284 | ||
1285 | usb_serial_generic_deregister(); | |
1286 | ||
1287 | usb_deregister(&usb_serial_driver); | |
1288 | tty_unregister_driver(usb_serial_tty_driver); | |
1289 | put_tty_driver(usb_serial_tty_driver); | |
1290 | bus_unregister(&usb_serial_bus_type); | |
1291 | } | |
1292 | ||
1293 | ||
1294 | module_init(usb_serial_init); | |
1295 | module_exit(usb_serial_exit); | |
1296 | ||
1297 | #define set_to_generic_if_null(type, function) \ | |
1298 | do { \ | |
1299 | if (!type->function) { \ | |
1300 | type->function = usb_serial_generic_##function; \ | |
1301 | dbg("Had to override the " #function \ | |
a8d6f0a9 | 1302 | " usb serial operation with the generic one.");\ |
1da177e4 LT |
1303 | } \ |
1304 | } while (0) | |
1305 | ||
ea65370d | 1306 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1307 | { |
1308 | set_to_generic_if_null(device, open); | |
1309 | set_to_generic_if_null(device, write); | |
1310 | set_to_generic_if_null(device, close); | |
1311 | set_to_generic_if_null(device, write_room); | |
1312 | set_to_generic_if_null(device, chars_in_buffer); | |
1313 | set_to_generic_if_null(device, read_bulk_callback); | |
1314 | set_to_generic_if_null(device, write_bulk_callback); | |
f9c99bb8 AS |
1315 | set_to_generic_if_null(device, disconnect); |
1316 | set_to_generic_if_null(device, release); | |
23154320 | 1317 | set_to_generic_if_null(device, process_read_urb); |
eaa3bcb0 | 1318 | set_to_generic_if_null(device, prepare_write_buffer); |
1da177e4 LT |
1319 | } |
1320 | ||
f799e767 | 1321 | static int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 LT |
1322 | { |
1323 | int retval; | |
1324 | ||
e4abe665 DY |
1325 | if (usb_disabled()) |
1326 | return -ENODEV; | |
1327 | ||
ea65370d | 1328 | fixup_generic(driver); |
1da177e4 | 1329 | |
269bda1c GKH |
1330 | if (!driver->description) |
1331 | driver->description = driver->driver.name; | |
5620b5f7 AS |
1332 | if (!driver->usb_driver) { |
1333 | WARN(1, "Serial driver %s has no usb_driver\n", | |
1334 | driver->description); | |
1335 | return -EINVAL; | |
1336 | } | |
269bda1c | 1337 | |
1da177e4 | 1338 | /* Add this device to our list of devices */ |
0daeed38 | 1339 | mutex_lock(&table_lock); |
ea65370d | 1340 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1341 | |
ea65370d | 1342 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1343 | if (retval) { |
194343d9 GKH |
1344 | printk(KERN_ERR "usb-serial: problem %d when registering " |
1345 | "driver %s\n", retval, driver->description); | |
ea65370d | 1346 | list_del(&driver->driver_list); |
a8d6f0a9 | 1347 | } else |
c197a8db | 1348 | printk(KERN_INFO "USB Serial support registered for %s\n", |
a8d6f0a9 | 1349 | driver->description); |
1da177e4 | 1350 | |
0daeed38 | 1351 | mutex_unlock(&table_lock); |
1da177e4 LT |
1352 | return retval; |
1353 | } | |
1354 | ||
f799e767 | 1355 | static void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1356 | { |
c197a8db GKH |
1357 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
1358 | device->description); | |
0daeed38 | 1359 | mutex_lock(&table_lock); |
1da177e4 LT |
1360 | list_del(&device->driver_list); |
1361 | usb_serial_bus_deregister(device); | |
0daeed38 | 1362 | mutex_unlock(&table_lock); |
1da177e4 | 1363 | } |
1da177e4 | 1364 | |
765e0ba6 AS |
1365 | /** |
1366 | * usb_serial_register_drivers - register drivers for a usb-serial module | |
1367 | * @udriver: usb_driver used for matching devices/interfaces | |
1368 | * @serial_drivers: NULL-terminated array of pointers to drivers to be registered | |
1369 | * | |
1370 | * Registers @udriver and all the drivers in the @serial_drivers array. | |
5cbe61c5 | 1371 | * Automatically fills in the .no_dynamic_id and PM fields in @udriver and |
765e0ba6 AS |
1372 | * the .usb_driver field in each serial driver. |
1373 | */ | |
1374 | int usb_serial_register_drivers(struct usb_driver *udriver, | |
1375 | struct usb_serial_driver * const serial_drivers[]) | |
1376 | { | |
1377 | int rc; | |
1378 | const struct usb_device_id *saved_id_table; | |
1379 | struct usb_serial_driver * const *sd; | |
1380 | ||
1381 | /* | |
1382 | * udriver must be registered before any of the serial drivers, | |
1383 | * because the store_new_id() routine for the serial drivers (in | |
1384 | * bus.c) probes udriver. | |
1385 | * | |
1386 | * Performance hack: We don't want udriver to be probed until | |
1387 | * the serial drivers are registered, because the probe would | |
1388 | * simply fail for lack of a matching serial driver. | |
1389 | * Therefore save off udriver's id_table until we are all set. | |
5cbe61c5 AS |
1390 | * |
1391 | * Suspend/resume support is implemented in the usb-serial core, | |
1392 | * so fill in the PM-related fields in udriver. | |
765e0ba6 AS |
1393 | */ |
1394 | saved_id_table = udriver->id_table; | |
1395 | udriver->id_table = NULL; | |
1396 | ||
1397 | udriver->no_dynamic_id = 1; | |
5cbe61c5 AS |
1398 | udriver->supports_autosuspend = 1; |
1399 | udriver->suspend = usb_serial_suspend; | |
1400 | udriver->resume = usb_serial_resume; | |
5026bb07 | 1401 | udriver->probe = usb_serial_probe; |
32078f91 | 1402 | udriver->disconnect = usb_serial_disconnect; |
765e0ba6 AS |
1403 | rc = usb_register(udriver); |
1404 | if (rc) | |
1405 | return rc; | |
1406 | ||
1407 | for (sd = serial_drivers; *sd; ++sd) { | |
1408 | (*sd)->usb_driver = udriver; | |
1409 | rc = usb_serial_register(*sd); | |
1410 | if (rc) | |
1411 | goto failed; | |
1412 | } | |
1413 | ||
1414 | /* Now restore udriver's id_table and look for matches */ | |
1415 | udriver->id_table = saved_id_table; | |
1416 | rc = driver_attach(&udriver->drvwrap.driver); | |
1417 | return 0; | |
1418 | ||
1419 | failed: | |
1420 | while (sd-- > serial_drivers) | |
1421 | usb_serial_deregister(*sd); | |
1422 | usb_deregister(udriver); | |
1423 | return rc; | |
1424 | } | |
1425 | EXPORT_SYMBOL_GPL(usb_serial_register_drivers); | |
1426 | ||
1427 | /** | |
1428 | * usb_serial_deregister_drivers - deregister drivers for a usb-serial module | |
1429 | * @udriver: usb_driver to unregister | |
1430 | * @serial_drivers: NULL-terminated array of pointers to drivers to be deregistered | |
1431 | * | |
1432 | * Deregisters @udriver and all the drivers in the @serial_drivers array. | |
1433 | */ | |
1434 | void usb_serial_deregister_drivers(struct usb_driver *udriver, | |
1435 | struct usb_serial_driver * const serial_drivers[]) | |
1436 | { | |
1437 | for (; *serial_drivers; ++serial_drivers) | |
1438 | usb_serial_deregister(*serial_drivers); | |
1439 | usb_deregister(udriver); | |
1440 | } | |
1441 | EXPORT_SYMBOL_GPL(usb_serial_deregister_drivers); | |
1da177e4 LT |
1442 | |
1443 | /* Module information */ | |
a8d6f0a9 AC |
1444 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1445 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1446 | MODULE_LICENSE("GPL"); |
1447 | ||
1448 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1449 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |