Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * USB Serial Converter driver | |
3 | * | |
502b95c1 | 4 | * Copyright (C) 1999 - 2005 Greg Kroah-Hartman (greg@kroah.com) |
1da177e4 LT |
5 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
6 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
502b95c1 | 12 | * This driver was originally based on the ACM driver by Armin Fuerst (which was |
1da177e4 LT |
13 | * based on a driver by Brad Keryan) |
14 | * | |
15 | * See Documentation/usb/usb-serial.txt for more information on using this driver | |
16 | * | |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/errno.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/tty.h> | |
24 | #include <linux/tty_driver.h> | |
25 | #include <linux/tty_flip.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <linux/spinlock.h> | |
1ce7dd26 | 29 | #include <linux/mutex.h> |
1da177e4 | 30 | #include <linux/list.h> |
1da177e4 LT |
31 | #include <asm/uaccess.h> |
32 | #include <linux/usb.h> | |
a969888c | 33 | #include <linux/usb/serial.h> |
1da177e4 LT |
34 | #include "pl2303.h" |
35 | ||
36 | /* | |
37 | * Version Information | |
38 | */ | |
1da177e4 LT |
39 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
40 | #define DRIVER_DESC "USB Serial Driver core" | |
41 | ||
34f8e761 PZ |
42 | static void port_free(struct usb_serial_port *port); |
43 | ||
1da177e4 LT |
44 | /* Driver structure we register with the USB core */ |
45 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
46 | .name = "usbserial", |
47 | .probe = usb_serial_probe, | |
48 | .disconnect = usb_serial_disconnect, | |
ec22559e ON |
49 | .suspend = usb_serial_suspend, |
50 | .resume = usb_serial_resume, | |
ba9dc657 | 51 | .no_dynamic_id = 1, |
1da177e4 LT |
52 | }; |
53 | ||
54 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
55 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
56 | cause the "hotplug" program to pull in whatever module is necessary | |
57 | via modprobe, and modprobe will load usbserial because the serial | |
58 | drivers depend on it. | |
59 | */ | |
60 | ||
61 | static int debug; | |
62 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; /* initially all NULL */ | |
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 | 285 | if (port->open_count == 0) { |
62ad296b ON |
286 | mutex_lock(&port->serial->disc_mutex); |
287 | if (!port->serial->disconnected) | |
288 | usb_autopm_put_interface(port->serial->interface); | |
289 | mutex_unlock(&port->serial->disc_mutex); | |
18fcac35 | 290 | module_put(port->serial->type->driver.owner); |
f0fbd5b9 | 291 | } |
1da177e4 | 292 | |
1ce7dd26 | 293 | mutex_unlock(&port->mutex); |
73e487fd | 294 | usb_serial_put(port->serial); |
1da177e4 LT |
295 | } |
296 | ||
297 | static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) | |
298 | { | |
81671ddb | 299 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 300 | int retval = -ENODEV; |
1da177e4 | 301 | |
f34d7a5b | 302 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
303 | goto exit; |
304 | ||
441b62c1 | 305 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
1da177e4 | 306 | |
f34d7a5b AC |
307 | /* open_count is managed under the mutex lock for the tty so cannot |
308 | drop to zero until after the last close completes */ | |
309 | WARN_ON(!port->open_count); | |
1da177e4 LT |
310 | |
311 | /* pass on to the driver specific version of this function */ | |
312 | retval = port->serial->type->write(port, buf, count); | |
313 | ||
314 | exit: | |
315 | return retval; | |
316 | } | |
317 | ||
318 | static int serial_write_room (struct tty_struct *tty) | |
319 | { | |
81671ddb | 320 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 321 | dbg("%s - port %d", __func__, port->number); |
f34d7a5b | 322 | WARN_ON(!port->open_count); |
1da177e4 | 323 | /* pass on to the driver specific version of this function */ |
f34d7a5b | 324 | return port->serial->type->write_room(port); |
1da177e4 LT |
325 | } |
326 | ||
327 | static int serial_chars_in_buffer (struct tty_struct *tty) | |
328 | { | |
81671ddb | 329 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 330 | dbg("%s = port %d", __func__, port->number); |
1da177e4 | 331 | |
f34d7a5b | 332 | WARN_ON(!port->open_count); |
1da177e4 | 333 | /* pass on to the driver specific version of this function */ |
f34d7a5b | 334 | return port->serial->type->chars_in_buffer(port); |
1da177e4 LT |
335 | } |
336 | ||
337 | static void serial_throttle (struct tty_struct * tty) | |
338 | { | |
81671ddb | 339 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 340 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 341 | |
f34d7a5b | 342 | WARN_ON(!port->open_count); |
1da177e4 LT |
343 | /* pass on to the driver specific version of this function */ |
344 | if (port->serial->type->throttle) | |
345 | port->serial->type->throttle(port); | |
346 | } | |
347 | ||
348 | static void serial_unthrottle (struct tty_struct * tty) | |
349 | { | |
81671ddb | 350 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 351 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 352 | |
f34d7a5b | 353 | WARN_ON(!port->open_count); |
1da177e4 LT |
354 | /* pass on to the driver specific version of this function */ |
355 | if (port->serial->type->unthrottle) | |
356 | port->serial->type->unthrottle(port); | |
357 | } | |
358 | ||
359 | static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) | |
360 | { | |
81671ddb | 361 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
362 | int retval = -ENODEV; |
363 | ||
441b62c1 | 364 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 | 365 | |
f34d7a5b | 366 | WARN_ON(!port->open_count); |
1da177e4 LT |
367 | |
368 | /* pass on to the driver specific version of this function if it is available */ | |
f34d7a5b AC |
369 | if (port->serial->type->ioctl) { |
370 | lock_kernel(); | |
1da177e4 | 371 | retval = port->serial->type->ioctl(port, file, cmd, arg); |
f34d7a5b AC |
372 | unlock_kernel(); |
373 | } | |
1da177e4 LT |
374 | else |
375 | retval = -ENOIOCTLCMD; | |
1da177e4 LT |
376 | return retval; |
377 | } | |
378 | ||
606d099c | 379 | static void serial_set_termios (struct tty_struct *tty, struct ktermios * old) |
1da177e4 | 380 | { |
81671ddb | 381 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 382 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 383 | |
f34d7a5b | 384 | WARN_ON(!port->open_count); |
1da177e4 LT |
385 | /* pass on to the driver specific version of this function if it is available */ |
386 | if (port->serial->type->set_termios) | |
387 | port->serial->type->set_termios(port, old); | |
33785091 AC |
388 | else |
389 | tty_termios_copy_hw(tty->termios, old); | |
1da177e4 LT |
390 | } |
391 | ||
392 | static void serial_break (struct tty_struct *tty, int break_state) | |
393 | { | |
81671ddb | 394 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 395 | |
441b62c1 | 396 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 397 | |
f34d7a5b | 398 | WARN_ON(!port->open_count); |
1da177e4 | 399 | /* pass on to the driver specific version of this function if it is available */ |
f34d7a5b AC |
400 | if (port->serial->type->break_ctl) { |
401 | lock_kernel(); | |
1da177e4 | 402 | port->serial->type->break_ctl(port, break_state); |
f34d7a5b AC |
403 | unlock_kernel(); |
404 | } | |
1da177e4 LT |
405 | } |
406 | ||
407 | static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) | |
408 | { | |
409 | struct usb_serial *serial; | |
410 | int length = 0; | |
411 | int i; | |
412 | off_t begin = 0; | |
413 | char tmp[40]; | |
414 | ||
441b62c1 | 415 | dbg("%s", __func__); |
17a882fc | 416 | length += sprintf (page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
417 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
418 | serial = usb_serial_get_by_index(i); | |
419 | if (serial == NULL) | |
420 | continue; | |
421 | ||
422 | length += sprintf (page+length, "%d:", i); | |
18fcac35 GKH |
423 | if (serial->type->driver.owner) |
424 | length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner)); | |
269bda1c | 425 | length += sprintf (page+length, " name:\"%s\"", serial->type->description); |
1da177e4 LT |
426 | length += sprintf (page+length, " vendor:%04x product:%04x", |
427 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
428 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
429 | length += sprintf (page+length, " num_ports:%d", serial->num_ports); | |
430 | length += sprintf (page+length, " port:%d", i - serial->minor + 1); | |
431 | ||
432 | usb_make_path(serial->dev, tmp, sizeof(tmp)); | |
433 | length += sprintf (page+length, " path:%s", tmp); | |
434 | ||
435 | length += sprintf (page+length, "\n"); | |
59925838 MU |
436 | if ((length + begin) > (off + count)) { |
437 | usb_serial_put(serial); | |
1da177e4 | 438 | goto done; |
59925838 | 439 | } |
1da177e4 LT |
440 | if ((length + begin) < off) { |
441 | begin += length; | |
442 | length = 0; | |
443 | } | |
73e487fd | 444 | usb_serial_put(serial); |
1da177e4 LT |
445 | } |
446 | *eof = 1; | |
447 | done: | |
448 | if (off >= (length + begin)) | |
449 | return 0; | |
450 | *start = page + (off-begin); | |
451 | return ((count < begin+length-off) ? count : begin+length-off); | |
452 | } | |
453 | ||
454 | static int serial_tiocmget (struct tty_struct *tty, struct file *file) | |
455 | { | |
81671ddb | 456 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 457 | |
441b62c1 | 458 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 459 | |
f34d7a5b | 460 | WARN_ON(!port->open_count); |
1da177e4 LT |
461 | if (port->serial->type->tiocmget) |
462 | return port->serial->type->tiocmget(port, file); | |
1da177e4 LT |
463 | return -EINVAL; |
464 | } | |
465 | ||
466 | static int serial_tiocmset (struct tty_struct *tty, struct file *file, | |
467 | unsigned int set, unsigned int clear) | |
468 | { | |
81671ddb | 469 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 470 | |
441b62c1 | 471 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 472 | |
f34d7a5b | 473 | WARN_ON(!port->open_count); |
1da177e4 LT |
474 | if (port->serial->type->tiocmset) |
475 | return port->serial->type->tiocmset(port, file, set, clear); | |
1da177e4 LT |
476 | return -EINVAL; |
477 | } | |
478 | ||
cf2c7481 PZ |
479 | /* |
480 | * We would be calling tty_wakeup here, but unfortunately some line | |
481 | * disciplines have an annoying habit of calling tty->write from | |
482 | * the write wakeup callback (e.g. n_hdlc.c). | |
483 | */ | |
484 | void usb_serial_port_softint(struct usb_serial_port *port) | |
485 | { | |
486 | schedule_work(&port->work); | |
487 | } | |
488 | ||
c4028958 | 489 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 490 | { |
c4028958 DH |
491 | struct usb_serial_port *port = |
492 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
493 | struct tty_struct *tty; |
494 | ||
441b62c1 | 495 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
496 | |
497 | if (!port) | |
498 | return; | |
499 | ||
500 | tty = port->tty; | |
501 | if (!tty) | |
502 | return; | |
503 | ||
504 | tty_wakeup(tty); | |
505 | } | |
506 | ||
507 | static void port_release(struct device *dev) | |
508 | { | |
509 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
510 | ||
7071a3ce | 511 | dbg ("%s - %s", __func__, dev_name(dev)); |
34f8e761 PZ |
512 | port_free(port); |
513 | } | |
514 | ||
34ef50e5 | 515 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 516 | { |
1da177e4 | 517 | usb_kill_urb(port->read_urb); |
1da177e4 | 518 | usb_kill_urb(port->write_urb); |
5adceac5 ON |
519 | /* |
520 | * This is tricky. | |
521 | * Some drivers submit the read_urb in the | |
522 | * handler for the write_urb or vice versa | |
523 | * this order determines the order in which | |
524 | * usb_kill_urb() must be used to reliably | |
525 | * kill the URBs. As it is unknown here, | |
526 | * both orders must be used in turn. | |
527 | * The call below is not redundant. | |
528 | */ | |
529 | usb_kill_urb(port->read_urb); | |
1da177e4 | 530 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 531 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
532 | } |
533 | ||
534 | static void port_free(struct usb_serial_port *port) | |
535 | { | |
536 | kill_traffic(port); | |
537 | usb_free_urb(port->read_urb); | |
538 | usb_free_urb(port->write_urb); | |
539 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 LT |
540 | usb_free_urb(port->interrupt_out_urb); |
541 | kfree(port->bulk_in_buffer); | |
542 | kfree(port->bulk_out_buffer); | |
543 | kfree(port->interrupt_in_buffer); | |
544 | kfree(port->interrupt_out_buffer); | |
34f8e761 | 545 | flush_scheduled_work(); /* port->work */ |
1da177e4 LT |
546 | kfree(port); |
547 | } | |
548 | ||
549 | static struct usb_serial * create_serial (struct usb_device *dev, | |
550 | struct usb_interface *interface, | |
ea65370d | 551 | struct usb_serial_driver *driver) |
1da177e4 LT |
552 | { |
553 | struct usb_serial *serial; | |
554 | ||
80b6ca48 | 555 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 556 | if (!serial) { |
441b62c1 | 557 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
558 | return NULL; |
559 | } | |
1da177e4 | 560 | serial->dev = usb_get_dev(dev); |
ea65370d | 561 | serial->type = driver; |
1da177e4 LT |
562 | serial->interface = interface; |
563 | kref_init(&serial->kref); | |
a1cd7e99 | 564 | mutex_init(&serial->disc_mutex); |
1da177e4 LT |
565 | |
566 | return serial; | |
567 | } | |
568 | ||
93bacefc GKH |
569 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
570 | struct usb_serial_driver *drv) | |
571 | { | |
572 | struct usb_dynid *dynid; | |
573 | ||
574 | spin_lock(&drv->dynids.lock); | |
575 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
576 | if (usb_match_one_id(intf, &dynid->id)) { | |
577 | spin_unlock(&drv->dynids.lock); | |
578 | return &dynid->id; | |
579 | } | |
580 | } | |
581 | spin_unlock(&drv->dynids.lock); | |
582 | return NULL; | |
583 | } | |
584 | ||
585 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
586 | struct usb_interface *intf) | |
587 | { | |
588 | const struct usb_device_id *id; | |
589 | ||
590 | id = usb_match_id(intf, drv->id_table); | |
591 | if (id) { | |
592 | dbg("static descriptor matches"); | |
593 | goto exit; | |
594 | } | |
595 | id = match_dynamic_id(intf, drv); | |
596 | if (id) | |
597 | dbg("dynamic descriptor matches"); | |
598 | exit: | |
599 | return id; | |
600 | } | |
601 | ||
ea65370d | 602 | static struct usb_serial_driver *search_serial_device(struct usb_interface *iface) |
1da177e4 | 603 | { |
1da177e4 | 604 | const struct usb_device_id *id; |
063a2da8 | 605 | struct usb_serial_driver *drv; |
1da177e4 | 606 | |
93b1fae4 | 607 | /* Check if the usb id matches a known device */ |
063a2da8 AS |
608 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
609 | id = get_iface_id(drv, iface); | |
93bacefc | 610 | if (id) |
063a2da8 | 611 | return drv; |
1da177e4 LT |
612 | } |
613 | ||
614 | return NULL; | |
615 | } | |
616 | ||
617 | int usb_serial_probe(struct usb_interface *interface, | |
618 | const struct usb_device_id *id) | |
619 | { | |
620 | struct usb_device *dev = interface_to_usbdev (interface); | |
621 | struct usb_serial *serial = NULL; | |
622 | struct usb_serial_port *port; | |
623 | struct usb_host_interface *iface_desc; | |
624 | struct usb_endpoint_descriptor *endpoint; | |
625 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
626 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
627 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
628 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 629 | struct usb_serial_driver *type = NULL; |
1da177e4 | 630 | int retval; |
dd9ca5d9 | 631 | unsigned int minor; |
1da177e4 LT |
632 | int buffer_size; |
633 | int i; | |
634 | int num_interrupt_in = 0; | |
635 | int num_interrupt_out = 0; | |
636 | int num_bulk_in = 0; | |
637 | int num_bulk_out = 0; | |
638 | int num_ports = 0; | |
639 | int max_endpoints; | |
640 | ||
4b10f0f3 | 641 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
642 | type = search_serial_device(interface); |
643 | if (!type) { | |
4b10f0f3 | 644 | unlock_kernel(); |
1da177e4 LT |
645 | dbg("none matched"); |
646 | return -ENODEV; | |
647 | } | |
648 | ||
649 | serial = create_serial (dev, interface, type); | |
650 | if (!serial) { | |
4b10f0f3 | 651 | unlock_kernel(); |
441b62c1 | 652 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
653 | return -ENOMEM; |
654 | } | |
655 | ||
656 | /* if this device type has a probe function, call it */ | |
657 | if (type->probe) { | |
658 | const struct usb_device_id *id; | |
659 | ||
18fcac35 | 660 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 661 | unlock_kernel(); |
1da177e4 LT |
662 | dev_err(&interface->dev, "module get failed, exiting\n"); |
663 | kfree (serial); | |
664 | return -EIO; | |
665 | } | |
666 | ||
93bacefc | 667 | id = get_iface_id(type, interface); |
1da177e4 | 668 | retval = type->probe(serial, id); |
18fcac35 | 669 | module_put(type->driver.owner); |
1da177e4 LT |
670 | |
671 | if (retval) { | |
4b10f0f3 | 672 | unlock_kernel(); |
1da177e4 LT |
673 | dbg ("sub driver rejected device"); |
674 | kfree (serial); | |
675 | return retval; | |
676 | } | |
677 | } | |
678 | ||
679 | /* descriptor matches, let's find the endpoints needed */ | |
680 | /* check out the endpoints */ | |
681 | iface_desc = interface->cur_altsetting; | |
682 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
683 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
684 | |
685 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
686 | /* we found a bulk in endpoint */ |
687 | dbg("found bulk in on endpoint %d", i); | |
688 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
689 | ++num_bulk_in; | |
690 | } | |
691 | ||
4fa1bbf5 | 692 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
693 | /* we found a bulk out endpoint */ |
694 | dbg("found bulk out on endpoint %d", i); | |
695 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
696 | ++num_bulk_out; | |
697 | } | |
4fa1bbf5 LFC |
698 | |
699 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
700 | /* we found a interrupt in endpoint */ |
701 | dbg("found interrupt in on endpoint %d", i); | |
702 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
703 | ++num_interrupt_in; | |
704 | } | |
705 | ||
4fa1bbf5 | 706 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
707 | /* we found an interrupt out endpoint */ |
708 | dbg("found interrupt out on endpoint %d", i); | |
709 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
710 | ++num_interrupt_out; | |
711 | } | |
712 | } | |
713 | ||
714 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
715 | /* BEGIN HORRIBLE HACK FOR PL2303 */ | |
716 | /* this is needed due to the looney way its endpoints are set up */ | |
717 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
718 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
719 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
720 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
721 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
722 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID))) { | |
1da177e4 LT |
723 | if (interface != dev->actconfig->interface[0]) { |
724 | /* check out the endpoints of the other interface*/ | |
725 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
726 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
727 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 728 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
729 | /* we found a interrupt in endpoint */ |
730 | dbg("found interrupt in for Prolific device on separate interface"); | |
731 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
732 | ++num_interrupt_in; | |
733 | } | |
734 | } | |
735 | } | |
736 | ||
737 | /* Now make sure the PL-2303 is configured correctly. | |
738 | * If not, give up now and hope this hack will work | |
739 | * properly during a later invocation of usb_serial_probe | |
740 | */ | |
741 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
4b10f0f3 | 742 | unlock_kernel(); |
1da177e4 LT |
743 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
744 | kfree (serial); | |
745 | return -ENODEV; | |
746 | } | |
747 | } | |
748 | /* END HORRIBLE HACK FOR PL2303 */ | |
749 | #endif | |
750 | ||
1da177e4 LT |
751 | #ifdef CONFIG_USB_SERIAL_GENERIC |
752 | if (type == &usb_serial_generic_device) { | |
753 | num_ports = num_bulk_out; | |
754 | if (num_ports == 0) { | |
4b10f0f3 | 755 | unlock_kernel(); |
1da177e4 LT |
756 | dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n"); |
757 | kfree (serial); | |
758 | return -EIO; | |
759 | } | |
760 | } | |
761 | #endif | |
762 | if (!num_ports) { | |
763 | /* if this device type has a calc_num_ports function, call it */ | |
764 | if (type->calc_num_ports) { | |
18fcac35 | 765 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 766 | unlock_kernel(); |
1da177e4 LT |
767 | dev_err(&interface->dev, "module get failed, exiting\n"); |
768 | kfree (serial); | |
769 | return -EIO; | |
770 | } | |
771 | num_ports = type->calc_num_ports (serial); | |
18fcac35 | 772 | module_put(type->driver.owner); |
1da177e4 LT |
773 | } |
774 | if (!num_ports) | |
775 | num_ports = type->num_ports; | |
776 | } | |
777 | ||
1da177e4 LT |
778 | serial->num_ports = num_ports; |
779 | serial->num_bulk_in = num_bulk_in; | |
780 | serial->num_bulk_out = num_bulk_out; | |
781 | serial->num_interrupt_in = num_interrupt_in; | |
782 | serial->num_interrupt_out = num_interrupt_out; | |
783 | ||
063a2da8 AS |
784 | /* found all that we need */ |
785 | dev_info(&interface->dev, "%s converter detected\n", | |
786 | type->description); | |
787 | ||
1da177e4 LT |
788 | /* create our ports, we need as many as the max endpoints */ |
789 | /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */ | |
790 | max_endpoints = max(num_bulk_in, num_bulk_out); | |
791 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
792 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
793 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
794 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
795 | unlock_kernel(); |
796 | ||
441b62c1 | 797 | dbg("%s - setting up %d port structures for this device", __func__, max_endpoints); |
1da177e4 | 798 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 799 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
800 | if (!port) |
801 | goto probe_error; | |
1da177e4 | 802 | port->serial = serial; |
507ca9bc | 803 | spin_lock_init(&port->lock); |
1ce7dd26 | 804 | mutex_init(&port->mutex); |
c4028958 | 805 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
806 | serial->port[i] = port; |
807 | } | |
808 | ||
809 | /* set up the endpoint information */ | |
810 | for (i = 0; i < num_bulk_in; ++i) { | |
811 | endpoint = bulk_in_endpoint[i]; | |
812 | port = serial->port[i]; | |
813 | port->read_urb = usb_alloc_urb (0, GFP_KERNEL); | |
814 | if (!port->read_urb) { | |
815 | dev_err(&interface->dev, "No free urbs available\n"); | |
816 | goto probe_error; | |
817 | } | |
818 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
819 | port->bulk_in_size = buffer_size; | |
820 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
821 | port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
822 | if (!port->bulk_in_buffer) { | |
823 | dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n"); | |
824 | goto probe_error; | |
825 | } | |
826 | usb_fill_bulk_urb (port->read_urb, dev, | |
827 | usb_rcvbulkpipe (dev, | |
828 | endpoint->bEndpointAddress), | |
829 | port->bulk_in_buffer, buffer_size, | |
830 | serial->type->read_bulk_callback, | |
831 | port); | |
832 | } | |
833 | ||
834 | for (i = 0; i < num_bulk_out; ++i) { | |
835 | endpoint = bulk_out_endpoint[i]; | |
836 | port = serial->port[i]; | |
837 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
838 | if (!port->write_urb) { | |
839 | dev_err(&interface->dev, "No free urbs available\n"); | |
840 | goto probe_error; | |
841 | } | |
842 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
843 | port->bulk_out_size = buffer_size; | |
844 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
845 | port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
846 | if (!port->bulk_out_buffer) { | |
847 | dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n"); | |
848 | goto probe_error; | |
849 | } | |
850 | usb_fill_bulk_urb (port->write_urb, dev, | |
851 | usb_sndbulkpipe (dev, | |
852 | endpoint->bEndpointAddress), | |
853 | port->bulk_out_buffer, buffer_size, | |
854 | serial->type->write_bulk_callback, | |
855 | port); | |
856 | } | |
857 | ||
858 | if (serial->type->read_int_callback) { | |
859 | for (i = 0; i < num_interrupt_in; ++i) { | |
860 | endpoint = interrupt_in_endpoint[i]; | |
861 | port = serial->port[i]; | |
862 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
863 | if (!port->interrupt_in_urb) { | |
864 | dev_err(&interface->dev, "No free urbs available\n"); | |
865 | goto probe_error; | |
866 | } | |
867 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
868 | port->interrupt_in_endpointAddress = endpoint->bEndpointAddress; | |
869 | port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
870 | if (!port->interrupt_in_buffer) { | |
871 | dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n"); | |
872 | goto probe_error; | |
873 | } | |
874 | usb_fill_int_urb (port->interrupt_in_urb, dev, | |
875 | usb_rcvintpipe (dev, | |
876 | endpoint->bEndpointAddress), | |
877 | port->interrupt_in_buffer, buffer_size, | |
878 | serial->type->read_int_callback, port, | |
879 | endpoint->bInterval); | |
880 | } | |
881 | } else if (num_interrupt_in) { | |
882 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
883 | } | |
884 | ||
885 | if (serial->type->write_int_callback) { | |
886 | for (i = 0; i < num_interrupt_out; ++i) { | |
887 | endpoint = interrupt_out_endpoint[i]; | |
888 | port = serial->port[i]; | |
889 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
890 | if (!port->interrupt_out_urb) { | |
891 | dev_err(&interface->dev, "No free urbs available\n"); | |
892 | goto probe_error; | |
893 | } | |
894 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
895 | port->interrupt_out_size = buffer_size; | |
896 | port->interrupt_out_endpointAddress = endpoint->bEndpointAddress; | |
897 | port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL); | |
898 | if (!port->interrupt_out_buffer) { | |
899 | dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n"); | |
900 | goto probe_error; | |
901 | } | |
902 | usb_fill_int_urb (port->interrupt_out_urb, dev, | |
903 | usb_sndintpipe (dev, | |
904 | endpoint->bEndpointAddress), | |
905 | port->interrupt_out_buffer, buffer_size, | |
906 | serial->type->write_int_callback, port, | |
907 | endpoint->bInterval); | |
908 | } | |
909 | } else if (num_interrupt_out) { | |
910 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
911 | } | |
912 | ||
913 | /* if this device type has an attach function, call it */ | |
914 | if (type->attach) { | |
18fcac35 | 915 | if (!try_module_get(type->driver.owner)) { |
1da177e4 LT |
916 | dev_err(&interface->dev, "module get failed, exiting\n"); |
917 | goto probe_error; | |
918 | } | |
919 | retval = type->attach (serial); | |
18fcac35 | 920 | module_put(type->driver.owner); |
1da177e4 LT |
921 | if (retval < 0) |
922 | goto probe_error; | |
923 | if (retval > 0) { | |
924 | /* quietly accept this device, but don't bind to a serial port | |
925 | * as it's about to disappear */ | |
926 | goto exit; | |
927 | } | |
928 | } | |
929 | ||
34ef50e5 ON |
930 | if (get_free_serial (serial, num_ports, &minor) == NULL) { |
931 | dev_err(&interface->dev, "No more free serial devices\n"); | |
932 | goto probe_error; | |
933 | } | |
c744f99e | 934 | serial->minor = minor; |
34ef50e5 | 935 | |
1da177e4 LT |
936 | /* register all of the individual ports with the driver core */ |
937 | for (i = 0; i < num_ports; ++i) { | |
938 | port = serial->port[i]; | |
939 | port->dev.parent = &interface->dev; | |
940 | port->dev.driver = NULL; | |
941 | port->dev.bus = &usb_serial_bus_type; | |
942 | port->dev.release = &port_release; | |
943 | ||
0031a06e | 944 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
7071a3ce | 945 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
13f4db9e GKH |
946 | retval = device_register(&port->dev); |
947 | if (retval) | |
948 | dev_err(&port->dev, "Error registering port device, " | |
949 | "continuing\n"); | |
1da177e4 LT |
950 | } |
951 | ||
952 | usb_serial_console_init (debug, minor); | |
953 | ||
954 | exit: | |
955 | /* success */ | |
956 | usb_set_intfdata (interface, serial); | |
957 | return 0; | |
958 | ||
959 | probe_error: | |
960 | for (i = 0; i < num_bulk_in; ++i) { | |
961 | port = serial->port[i]; | |
962 | if (!port) | |
963 | continue; | |
95d43166 | 964 | usb_free_urb(port->read_urb); |
1da177e4 LT |
965 | kfree(port->bulk_in_buffer); |
966 | } | |
967 | for (i = 0; i < num_bulk_out; ++i) { | |
968 | port = serial->port[i]; | |
969 | if (!port) | |
970 | continue; | |
95d43166 | 971 | usb_free_urb(port->write_urb); |
1da177e4 LT |
972 | kfree(port->bulk_out_buffer); |
973 | } | |
974 | for (i = 0; i < num_interrupt_in; ++i) { | |
975 | port = serial->port[i]; | |
976 | if (!port) | |
977 | continue; | |
95d43166 | 978 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 LT |
979 | kfree(port->interrupt_in_buffer); |
980 | } | |
981 | for (i = 0; i < num_interrupt_out; ++i) { | |
982 | port = serial->port[i]; | |
983 | if (!port) | |
984 | continue; | |
95d43166 | 985 | usb_free_urb(port->interrupt_out_urb); |
1da177e4 LT |
986 | kfree(port->interrupt_out_buffer); |
987 | } | |
988 | ||
1da177e4 LT |
989 | /* free up any memory that we allocated */ |
990 | for (i = 0; i < serial->num_port_pointers; ++i) | |
991 | kfree(serial->port[i]); | |
992 | kfree (serial); | |
993 | return -EIO; | |
994 | } | |
995 | ||
996 | void usb_serial_disconnect(struct usb_interface *interface) | |
997 | { | |
998 | int i; | |
999 | struct usb_serial *serial = usb_get_intfdata (interface); | |
1000 | struct device *dev = &interface->dev; | |
1001 | struct usb_serial_port *port; | |
1002 | ||
73e487fd | 1003 | usb_serial_console_disconnect(serial); |
441b62c1 | 1004 | dbg ("%s", __func__); |
1da177e4 | 1005 | |
a1cd7e99 | 1006 | mutex_lock(&serial->disc_mutex); |
1da177e4 | 1007 | usb_set_intfdata (interface, NULL); |
a1cd7e99 ON |
1008 | /* must set a flag, to signal subdrivers */ |
1009 | serial->disconnected = 1; | |
1010 | for (i = 0; i < serial->num_ports; ++i) { | |
1011 | port = serial->port[i]; | |
1012 | if (port) { | |
1013 | if (port->tty) | |
1014 | tty_hangup(port->tty); | |
1015 | kill_traffic(port); | |
1da177e4 | 1016 | } |
1da177e4 | 1017 | } |
a1cd7e99 ON |
1018 | /* let the last holder of this object |
1019 | * cause it to be cleaned up */ | |
1020 | mutex_unlock(&serial->disc_mutex); | |
1021 | usb_serial_put(serial); | |
1da177e4 LT |
1022 | dev_info(dev, "device disconnected\n"); |
1023 | } | |
1024 | ||
ec22559e ON |
1025 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1026 | { | |
1027 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1028 | struct usb_serial_port *port; | |
1029 | int i, r = 0; | |
1030 | ||
e31c1880 ON |
1031 | for (i = 0; i < serial->num_ports; ++i) { |
1032 | port = serial->port[i]; | |
1033 | if (port) | |
1034 | kill_traffic(port); | |
ec22559e ON |
1035 | } |
1036 | ||
1037 | if (serial->type->suspend) | |
e31c1880 | 1038 | r = serial->type->suspend(serial, message); |
ec22559e ON |
1039 | |
1040 | return r; | |
1041 | } | |
1042 | EXPORT_SYMBOL(usb_serial_suspend); | |
1043 | ||
1044 | int usb_serial_resume(struct usb_interface *intf) | |
1045 | { | |
1046 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1047 | ||
8abaee23 SS |
1048 | if (serial->type->resume) |
1049 | return serial->type->resume(serial); | |
1050 | return 0; | |
ec22559e ON |
1051 | } |
1052 | EXPORT_SYMBOL(usb_serial_resume); | |
1053 | ||
b68e31d0 | 1054 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1055 | .open = serial_open, |
1056 | .close = serial_close, | |
1057 | .write = serial_write, | |
1058 | .write_room = serial_write_room, | |
1059 | .ioctl = serial_ioctl, | |
1060 | .set_termios = serial_set_termios, | |
1061 | .throttle = serial_throttle, | |
1062 | .unthrottle = serial_unthrottle, | |
1063 | .break_ctl = serial_break, | |
1064 | .chars_in_buffer = serial_chars_in_buffer, | |
1065 | .read_proc = serial_read_proc, | |
1066 | .tiocmget = serial_tiocmget, | |
1067 | .tiocmset = serial_tiocmset, | |
1068 | }; | |
1069 | ||
1070 | struct tty_driver *usb_serial_tty_driver; | |
1071 | ||
1072 | static int __init usb_serial_init(void) | |
1073 | { | |
1074 | int i; | |
1075 | int result; | |
1076 | ||
1077 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1078 | if (!usb_serial_tty_driver) | |
1079 | return -ENOMEM; | |
1080 | ||
1081 | /* Initialize our global data */ | |
1082 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1083 | serial_table[i] = NULL; | |
1084 | } | |
1085 | ||
1086 | result = bus_register(&usb_serial_bus_type); | |
1087 | if (result) { | |
441b62c1 | 1088 | err("%s - registering bus driver failed", __func__); |
1da177e4 LT |
1089 | goto exit_bus; |
1090 | } | |
1091 | ||
1da177e4 LT |
1092 | usb_serial_tty_driver->owner = THIS_MODULE; |
1093 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1094 | usb_serial_tty_driver->name = "ttyUSB"; |
1095 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1096 | usb_serial_tty_driver->minor_start = 0; | |
1097 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1098 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
331b8319 | 1099 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1100 | usb_serial_tty_driver->init_termios = tty_std_termios; |
1101 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
a5b6f60c AC |
1102 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1103 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1104 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1105 | result = tty_register_driver(usb_serial_tty_driver); | |
1106 | if (result) { | |
441b62c1 | 1107 | err("%s - tty_register_driver failed", __func__); |
1da177e4 LT |
1108 | goto exit_reg_driver; |
1109 | } | |
1110 | ||
1111 | /* register the USB driver */ | |
1112 | result = usb_register(&usb_serial_driver); | |
1113 | if (result < 0) { | |
441b62c1 | 1114 | err("%s - usb_register failed", __func__); |
1da177e4 LT |
1115 | goto exit_tty; |
1116 | } | |
1117 | ||
06299db3 GKH |
1118 | /* register the generic driver, if we should */ |
1119 | result = usb_serial_generic_register(debug); | |
1120 | if (result < 0) { | |
441b62c1 | 1121 | err("%s - registering generic driver failed", __func__); |
06299db3 GKH |
1122 | goto exit_generic; |
1123 | } | |
1124 | ||
17a882fc | 1125 | info(DRIVER_DESC); |
1da177e4 LT |
1126 | |
1127 | return result; | |
1128 | ||
06299db3 GKH |
1129 | exit_generic: |
1130 | usb_deregister(&usb_serial_driver); | |
1131 | ||
1da177e4 LT |
1132 | exit_tty: |
1133 | tty_unregister_driver(usb_serial_tty_driver); | |
1134 | ||
1135 | exit_reg_driver: | |
1da177e4 LT |
1136 | bus_unregister(&usb_serial_bus_type); |
1137 | ||
1138 | exit_bus: | |
441b62c1 | 1139 | err ("%s - returning with error %d", __func__, result); |
1da177e4 LT |
1140 | put_tty_driver(usb_serial_tty_driver); |
1141 | return result; | |
1142 | } | |
1143 | ||
1144 | ||
1145 | static void __exit usb_serial_exit(void) | |
1146 | { | |
1147 | usb_serial_console_exit(); | |
1148 | ||
1149 | usb_serial_generic_deregister(); | |
1150 | ||
1151 | usb_deregister(&usb_serial_driver); | |
1152 | tty_unregister_driver(usb_serial_tty_driver); | |
1153 | put_tty_driver(usb_serial_tty_driver); | |
1154 | bus_unregister(&usb_serial_bus_type); | |
1155 | } | |
1156 | ||
1157 | ||
1158 | module_init(usb_serial_init); | |
1159 | module_exit(usb_serial_exit); | |
1160 | ||
1161 | #define set_to_generic_if_null(type, function) \ | |
1162 | do { \ | |
1163 | if (!type->function) { \ | |
1164 | type->function = usb_serial_generic_##function; \ | |
1165 | dbg("Had to override the " #function \ | |
1166 | " usb serial operation with the generic one.");\ | |
1167 | } \ | |
1168 | } while (0) | |
1169 | ||
ea65370d | 1170 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1171 | { |
1172 | set_to_generic_if_null(device, open); | |
1173 | set_to_generic_if_null(device, write); | |
1174 | set_to_generic_if_null(device, close); | |
1175 | set_to_generic_if_null(device, write_room); | |
1176 | set_to_generic_if_null(device, chars_in_buffer); | |
1177 | set_to_generic_if_null(device, read_bulk_callback); | |
1178 | set_to_generic_if_null(device, write_bulk_callback); | |
1179 | set_to_generic_if_null(device, shutdown); | |
f0fbd5b9 | 1180 | set_to_generic_if_null(device, resume); |
1da177e4 LT |
1181 | } |
1182 | ||
4b10f0f3 | 1183 | int usb_serial_register(struct usb_serial_driver *driver) /* must be called with BKL held */ |
1da177e4 LT |
1184 | { |
1185 | int retval; | |
1186 | ||
ea65370d | 1187 | fixup_generic(driver); |
1da177e4 | 1188 | |
269bda1c GKH |
1189 | if (!driver->description) |
1190 | driver->description = driver->driver.name; | |
1191 | ||
1da177e4 | 1192 | /* Add this device to our list of devices */ |
ea65370d | 1193 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1194 | |
ea65370d | 1195 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1196 | if (retval) { |
269bda1c | 1197 | err("problem %d when registering driver %s", retval, driver->description); |
ea65370d | 1198 | list_del(&driver->driver_list); |
1da177e4 LT |
1199 | } |
1200 | else | |
269bda1c | 1201 | info("USB Serial support registered for %s", driver->description); |
1da177e4 LT |
1202 | |
1203 | return retval; | |
1204 | } | |
1205 | ||
1206 | ||
4b10f0f3 | 1207 | void usb_serial_deregister(struct usb_serial_driver *device) /* must be called with BKL held */ |
1da177e4 | 1208 | { |
269bda1c | 1209 | info("USB Serial deregistering driver %s", device->description); |
1da177e4 LT |
1210 | list_del(&device->driver_list); |
1211 | usb_serial_bus_deregister(device); | |
1212 | } | |
1213 | ||
1214 | ||
1215 | ||
1216 | /* If the usb-serial core is built into the core, the usb-serial drivers | |
1217 | need these symbols to load properly as modules. */ | |
1218 | EXPORT_SYMBOL_GPL(usb_serial_register); | |
1219 | EXPORT_SYMBOL_GPL(usb_serial_deregister); | |
1220 | EXPORT_SYMBOL_GPL(usb_serial_probe); | |
1221 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); | |
1222 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); | |
1223 | ||
1224 | ||
1225 | /* Module information */ | |
1226 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1227 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1da177e4 LT |
1228 | MODULE_LICENSE("GPL"); |
1229 | ||
1230 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1231 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |