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 | * | |
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> | |
405f5571 | 24 | #include <linux/smp_lock.h> |
1da177e4 LT |
25 | #include <linux/tty.h> |
26 | #include <linux/tty_driver.h> | |
27 | #include <linux/tty_flip.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/moduleparam.h> | |
6fd69d3c | 30 | #include <linux/seq_file.h> |
1da177e4 | 31 | #include <linux/spinlock.h> |
1ce7dd26 | 32 | #include <linux/mutex.h> |
1da177e4 | 33 | #include <linux/list.h> |
a8d6f0a9 | 34 | #include <linux/uaccess.h> |
c56d3000 | 35 | #include <linux/serial.h> |
1da177e4 | 36 | #include <linux/usb.h> |
a969888c | 37 | #include <linux/usb/serial.h> |
8e8dce06 | 38 | #include <linux/kfifo.h> |
1da177e4 LT |
39 | #include "pl2303.h" |
40 | ||
41 | /* | |
42 | * Version Information | |
43 | */ | |
1da177e4 LT |
44 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
45 | #define DRIVER_DESC "USB Serial Driver core" | |
46 | ||
47 | /* Driver structure we register with the USB core */ | |
48 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
49 | .name = "usbserial", |
50 | .probe = usb_serial_probe, | |
51 | .disconnect = usb_serial_disconnect, | |
ec22559e ON |
52 | .suspend = usb_serial_suspend, |
53 | .resume = usb_serial_resume, | |
ba9dc657 | 54 | .no_dynamic_id = 1, |
1da177e4 LT |
55 | }; |
56 | ||
57 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
58 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
59 | cause the "hotplug" program to pull in whatever module is necessary | |
60 | via modprobe, and modprobe will load usbserial because the serial | |
61 | drivers depend on it. | |
62 | */ | |
63 | ||
64 | static int debug; | |
a8d6f0a9 AC |
65 | /* initially all NULL */ |
66 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; | |
3ddad823 | 67 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
68 | static LIST_HEAD(usb_serial_driver_list); |
69 | ||
8bc2c1b2 AS |
70 | /* |
71 | * Look up the serial structure. If it is found and it hasn't been | |
72 | * disconnected, return with its disc_mutex held and its refcount | |
73 | * incremented. Otherwise return NULL. | |
74 | */ | |
1da177e4 LT |
75 | struct usb_serial *usb_serial_get_by_index(unsigned index) |
76 | { | |
34ef50e5 ON |
77 | struct usb_serial *serial; |
78 | ||
3ddad823 | 79 | mutex_lock(&table_lock); |
34ef50e5 | 80 | serial = serial_table[index]; |
1da177e4 | 81 | |
8bc2c1b2 AS |
82 | if (serial) { |
83 | mutex_lock(&serial->disc_mutex); | |
84 | if (serial->disconnected) { | |
85 | mutex_unlock(&serial->disc_mutex); | |
86 | serial = NULL; | |
87 | } else { | |
88 | kref_get(&serial->kref); | |
89 | } | |
90 | } | |
3ddad823 | 91 | mutex_unlock(&table_lock); |
1da177e4 LT |
92 | return serial; |
93 | } | |
94 | ||
a8d6f0a9 AC |
95 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
96 | int num_ports, unsigned int *minor) | |
1da177e4 LT |
97 | { |
98 | unsigned int i, j; | |
99 | int good_spot; | |
100 | ||
441b62c1 | 101 | dbg("%s %d", __func__, num_ports); |
1da177e4 LT |
102 | |
103 | *minor = 0; | |
3ddad823 | 104 | mutex_lock(&table_lock); |
1da177e4 LT |
105 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
106 | if (serial_table[i]) | |
107 | continue; | |
108 | ||
109 | good_spot = 1; | |
110 | for (j = 1; j <= num_ports-1; ++j) | |
111 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
112 | good_spot = 0; | |
113 | i += j; | |
114 | break; | |
115 | } | |
116 | if (good_spot == 0) | |
117 | continue; | |
118 | ||
119 | *minor = i; | |
a1f721c8 | 120 | j = 0; |
441b62c1 | 121 | dbg("%s - minor base = %d", __func__, *minor); |
a1f721c8 | 122 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 123 | serial_table[i] = serial; |
a1f721c8 ON |
124 | serial->port[j++]->number = i; |
125 | } | |
3ddad823 | 126 | mutex_unlock(&table_lock); |
1da177e4 LT |
127 | return serial; |
128 | } | |
3ddad823 | 129 | mutex_unlock(&table_lock); |
1da177e4 LT |
130 | return NULL; |
131 | } | |
132 | ||
133 | static void return_serial(struct usb_serial *serial) | |
134 | { | |
135 | int i; | |
136 | ||
441b62c1 | 137 | dbg("%s", __func__); |
1da177e4 | 138 | |
8bc2c1b2 | 139 | mutex_lock(&table_lock); |
a8d6f0a9 | 140 | for (i = 0; i < serial->num_ports; ++i) |
1da177e4 | 141 | serial_table[serial->minor + i] = NULL; |
8bc2c1b2 | 142 | mutex_unlock(&table_lock); |
1da177e4 LT |
143 | } |
144 | ||
145 | static void destroy_serial(struct kref *kref) | |
146 | { | |
147 | struct usb_serial *serial; | |
148 | struct usb_serial_port *port; | |
149 | int i; | |
150 | ||
151 | serial = to_usb_serial(kref); | |
152 | ||
441b62c1 | 153 | dbg("%s - %s", __func__, serial->type->description); |
1da177e4 | 154 | |
521b85ae | 155 | /* return the minor range that this device had */ |
0282b7f2 AS |
156 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
157 | return_serial(serial); | |
521b85ae | 158 | |
a4720c65 AS |
159 | if (serial->attached) |
160 | serial->type->release(serial); | |
f9c99bb8 | 161 | |
41bd34dd AS |
162 | /* Now that nothing is using the ports, they can be freed */ |
163 | for (i = 0; i < serial->num_port_pointers; ++i) { | |
f9c99bb8 | 164 | port = serial->port[i]; |
41bd34dd AS |
165 | if (port) { |
166 | port->serial = NULL; | |
f9c99bb8 | 167 | put_device(&port->dev); |
1da177e4 LT |
168 | } |
169 | } | |
170 | ||
171 | usb_put_dev(serial->dev); | |
a8d6f0a9 | 172 | kfree(serial); |
1da177e4 LT |
173 | } |
174 | ||
73e487fd GL |
175 | void usb_serial_put(struct usb_serial *serial) |
176 | { | |
177 | kref_put(&serial->kref, destroy_serial); | |
178 | } | |
179 | ||
1da177e4 LT |
180 | /***************************************************************************** |
181 | * Driver tty interface functions | |
182 | *****************************************************************************/ | |
f5b0953a AS |
183 | |
184 | /** | |
185 | * serial_install - install tty | |
186 | * @driver: the driver (USB in our case) | |
187 | * @tty: the tty being created | |
188 | * | |
189 | * Create the termios objects for this tty. We use the default | |
190 | * USB serial settings but permit them to be overridden by | |
191 | * serial->type->init_termios. | |
cc56cd01 AS |
192 | * |
193 | * This is the first place a new tty gets used. Hence this is where we | |
194 | * acquire references to the usb_serial structure and the driver module, | |
195 | * where we store a pointer to the port, and where we do an autoresume. | |
f278a2f7 | 196 | * All these actions are reversed in serial_cleanup(). |
f5b0953a AS |
197 | */ |
198 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) | |
199 | { | |
200 | int idx = tty->index; | |
201 | struct usb_serial *serial; | |
cc56cd01 AS |
202 | struct usb_serial_port *port; |
203 | int retval = -ENODEV; | |
204 | ||
ff8324df AS |
205 | dbg("%s", __func__); |
206 | ||
cc56cd01 AS |
207 | serial = usb_serial_get_by_index(idx); |
208 | if (!serial) | |
209 | return retval; | |
210 | ||
211 | port = serial->port[idx - serial->minor]; | |
212 | if (!port) | |
213 | goto error_no_port; | |
214 | if (!try_module_get(serial->type->driver.owner)) | |
215 | goto error_module_get; | |
216 | ||
7e29bb4b AS |
217 | /* perform the standard setup */ |
218 | retval = tty_init_termios(tty); | |
219 | if (retval) | |
220 | goto error_init_termios; | |
221 | ||
cc56cd01 AS |
222 | retval = usb_autopm_get_interface(serial->interface); |
223 | if (retval) | |
224 | goto error_get_interface; | |
f5b0953a | 225 | |
cc56cd01 AS |
226 | mutex_unlock(&serial->disc_mutex); |
227 | ||
7e29bb4b AS |
228 | /* allow the driver to update the settings */ |
229 | if (serial->type->init_termios) | |
230 | serial->type->init_termios(tty); | |
231 | ||
cc56cd01 AS |
232 | tty->driver_data = port; |
233 | ||
f5b0953a AS |
234 | /* Final install (we use the default method) */ |
235 | tty_driver_kref_get(driver); | |
236 | tty->count++; | |
237 | driver->ttys[idx] = tty; | |
cc56cd01 AS |
238 | return retval; |
239 | ||
cc56cd01 | 240 | error_get_interface: |
7e29bb4b | 241 | error_init_termios: |
cc56cd01 AS |
242 | module_put(serial->type->driver.owner); |
243 | error_module_get: | |
244 | error_no_port: | |
245 | usb_serial_put(serial); | |
246 | mutex_unlock(&serial->disc_mutex); | |
247 | return retval; | |
f5b0953a AS |
248 | } |
249 | ||
64bc3979 | 250 | static int serial_activate(struct tty_port *tport, struct tty_struct *tty) |
1da177e4 | 251 | { |
64bc3979 AC |
252 | struct usb_serial_port *port = |
253 | container_of(tport, struct usb_serial_port, port); | |
320348c8 AS |
254 | struct usb_serial *serial = port->serial; |
255 | int retval; | |
331879fd | 256 | |
64bc3979 AC |
257 | mutex_lock(&serial->disc_mutex); |
258 | if (serial->disconnected) | |
259 | retval = -ENODEV; | |
260 | else | |
261 | retval = port->serial->type->open(tty, port); | |
262 | mutex_unlock(&serial->disc_mutex); | |
64bc3979 AC |
263 | return retval; |
264 | } | |
1da177e4 | 265 | |
64bc3979 AC |
266 | static int serial_open(struct tty_struct *tty, struct file *filp) |
267 | { | |
268 | struct usb_serial_port *port = tty->driver_data; | |
320348c8 | 269 | |
64bc3979 AC |
270 | dbg("%s - port %d", __func__, port->number); |
271 | return tty_port_open(&port->port, tty, filp); | |
1da177e4 LT |
272 | } |
273 | ||
335f8514 | 274 | /** |
74556123 | 275 | * serial_down - shut down hardware |
e1108a63 | 276 | * @tport: tty port to shut down |
335f8514 | 277 | * |
f5b0953a | 278 | * Shut down a USB serial port unless it is the console. We never |
e1108a63 AC |
279 | * shut down the console hardware as it will always be in use. Serialized |
280 | * against activate by the tport mutex and kept to matching open/close pairs | |
281 | * of calls by the ASYNCB_INITIALIZED flag. | |
335f8514 | 282 | */ |
e1108a63 | 283 | static void serial_down(struct tty_port *tport) |
1da177e4 | 284 | { |
e1108a63 AC |
285 | struct usb_serial_port *port = |
286 | container_of(tport, struct usb_serial_port, port); | |
335f8514 | 287 | struct usb_serial_driver *drv = port->serial->type; |
f5b0953a AS |
288 | /* |
289 | * The console is magical. Do not hang up the console hardware | |
290 | * or there will be tears. | |
291 | */ | |
335f8514 | 292 | if (port->console) |
1da177e4 | 293 | return; |
335f8514 AC |
294 | if (drv->close) |
295 | drv->close(port); | |
335f8514 AC |
296 | } |
297 | ||
f5b0953a AS |
298 | static void serial_hangup(struct tty_struct *tty) |
299 | { | |
300 | struct usb_serial_port *port = tty->driver_data; | |
ff8324df | 301 | dbg("%s - port %d", __func__, port->number); |
f5b0953a | 302 | tty_port_hangup(&port->port); |
f5b0953a AS |
303 | } |
304 | ||
305 | static void serial_close(struct tty_struct *tty, struct file *filp) | |
306 | { | |
307 | struct usb_serial_port *port = tty->driver_data; | |
f5b0953a | 308 | dbg("%s - port %d", __func__, port->number); |
e1108a63 | 309 | tty_port_close(&port->port, tty, filp); |
f5b0953a AS |
310 | } |
311 | ||
335f8514 | 312 | /** |
f278a2f7 | 313 | * serial_cleanup - free resources post close/hangup |
f5b0953a | 314 | * @port: port to free up |
335f8514 | 315 | * |
f5b0953a AS |
316 | * Do the resource freeing and refcount dropping for the port. |
317 | * Avoid freeing the console. | |
4455e344 | 318 | * |
f278a2f7 DY |
319 | * Called asynchronously after the last tty kref is dropped, |
320 | * and the tty layer has already done the tty_shutdown(tty); | |
335f8514 | 321 | */ |
f278a2f7 | 322 | static void serial_cleanup(struct tty_struct *tty) |
335f8514 | 323 | { |
4455e344 | 324 | struct usb_serial_port *port = tty->driver_data; |
335f8514 AC |
325 | struct usb_serial *serial; |
326 | struct module *owner; | |
327 | ||
f5b0953a AS |
328 | /* The console is magical. Do not hang up the console hardware |
329 | * or there will be tears. | |
330 | */ | |
cc56cd01 | 331 | if (port->console) |
335f8514 AC |
332 | return; |
333 | ||
ff8324df AS |
334 | dbg("%s - port %d", __func__, port->number); |
335 | ||
cc56cd01 AS |
336 | tty->driver_data = NULL; |
337 | ||
335f8514 AC |
338 | serial = port->serial; |
339 | owner = serial->type->driver.owner; | |
41bd34dd | 340 | |
335f8514 AC |
341 | mutex_lock(&serial->disc_mutex); |
342 | if (!serial->disconnected) | |
343 | usb_autopm_put_interface(serial->interface); | |
344 | mutex_unlock(&serial->disc_mutex); | |
41bd34dd | 345 | |
2d93148a | 346 | usb_serial_put(serial); |
335f8514 AC |
347 | module_put(owner); |
348 | } | |
349 | ||
a8d6f0a9 AC |
350 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
351 | int count) | |
1da177e4 | 352 | { |
81671ddb | 353 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 354 | int retval = -ENODEV; |
1da177e4 | 355 | |
f34d7a5b | 356 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
357 | goto exit; |
358 | ||
441b62c1 | 359 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
1da177e4 | 360 | |
95da310e | 361 | /* count is managed under the mutex lock for the tty so cannot |
a8d6f0a9 | 362 | drop to zero until after the last close completes */ |
95da310e | 363 | WARN_ON(!port->port.count); |
1da177e4 LT |
364 | |
365 | /* pass on to the driver specific version of this function */ | |
95da310e | 366 | retval = port->serial->type->write(tty, port, buf, count); |
1da177e4 LT |
367 | |
368 | exit: | |
369 | return retval; | |
370 | } | |
371 | ||
a8d6f0a9 | 372 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 373 | { |
81671ddb | 374 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 375 | dbg("%s - port %d", __func__, port->number); |
95da310e | 376 | WARN_ON(!port->port.count); |
1da177e4 | 377 | /* pass on to the driver specific version of this function */ |
95da310e | 378 | return port->serial->type->write_room(tty); |
1da177e4 LT |
379 | } |
380 | ||
a8d6f0a9 | 381 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 382 | { |
81671ddb | 383 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 384 | dbg("%s = port %d", __func__, port->number); |
1da177e4 | 385 | |
eff6937a AC |
386 | /* if the device was unplugged then any remaining characters |
387 | fell out of the connector ;) */ | |
388 | if (port->serial->disconnected) | |
389 | return 0; | |
1da177e4 | 390 | /* pass on to the driver specific version of this function */ |
95da310e | 391 | return port->serial->type->chars_in_buffer(tty); |
1da177e4 LT |
392 | } |
393 | ||
a8d6f0a9 | 394 | static void serial_throttle(struct tty_struct *tty) |
1da177e4 | 395 | { |
81671ddb | 396 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 397 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 398 | |
95da310e | 399 | WARN_ON(!port->port.count); |
1da177e4 LT |
400 | /* pass on to the driver specific version of this function */ |
401 | if (port->serial->type->throttle) | |
95da310e | 402 | port->serial->type->throttle(tty); |
1da177e4 LT |
403 | } |
404 | ||
a8d6f0a9 | 405 | static void serial_unthrottle(struct tty_struct *tty) |
1da177e4 | 406 | { |
81671ddb | 407 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 408 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 409 | |
95da310e | 410 | WARN_ON(!port->port.count); |
1da177e4 LT |
411 | /* pass on to the driver specific version of this function */ |
412 | if (port->serial->type->unthrottle) | |
95da310e | 413 | port->serial->type->unthrottle(tty); |
1da177e4 LT |
414 | } |
415 | ||
a8d6f0a9 AC |
416 | static int serial_ioctl(struct tty_struct *tty, struct file *file, |
417 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 418 | { |
81671ddb | 419 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
420 | int retval = -ENODEV; |
421 | ||
441b62c1 | 422 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 | 423 | |
95da310e | 424 | WARN_ON(!port->port.count); |
1da177e4 | 425 | |
a8d6f0a9 AC |
426 | /* pass on to the driver specific version of this function |
427 | if it is available */ | |
f34d7a5b | 428 | if (port->serial->type->ioctl) { |
95da310e | 429 | retval = port->serial->type->ioctl(tty, file, cmd, arg); |
a8d6f0a9 | 430 | } else |
1da177e4 | 431 | retval = -ENOIOCTLCMD; |
1da177e4 LT |
432 | return retval; |
433 | } | |
434 | ||
a8d6f0a9 | 435 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 436 | { |
81671ddb | 437 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 438 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 439 | |
95da310e | 440 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
441 | /* pass on to the driver specific version of this function |
442 | if it is available */ | |
1da177e4 | 443 | if (port->serial->type->set_termios) |
95da310e | 444 | port->serial->type->set_termios(tty, port, old); |
33785091 AC |
445 | else |
446 | tty_termios_copy_hw(tty->termios, old); | |
1da177e4 LT |
447 | } |
448 | ||
9e98966c | 449 | static int serial_break(struct tty_struct *tty, int break_state) |
1da177e4 | 450 | { |
81671ddb | 451 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 452 | |
441b62c1 | 453 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 454 | |
95da310e | 455 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
456 | /* pass on to the driver specific version of this function |
457 | if it is available */ | |
6b447f04 | 458 | if (port->serial->type->break_ctl) |
95da310e | 459 | port->serial->type->break_ctl(tty, break_state); |
9e98966c | 460 | return 0; |
1da177e4 LT |
461 | } |
462 | ||
6fd69d3c | 463 | static int serial_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
464 | { |
465 | struct usb_serial *serial; | |
1da177e4 | 466 | int i; |
1da177e4 LT |
467 | char tmp[40]; |
468 | ||
441b62c1 | 469 | dbg("%s", __func__); |
6fd69d3c AD |
470 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
471 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1da177e4 LT |
472 | serial = usb_serial_get_by_index(i); |
473 | if (serial == NULL) | |
474 | continue; | |
475 | ||
6fd69d3c | 476 | seq_printf(m, "%d:", i); |
18fcac35 | 477 | if (serial->type->driver.owner) |
6fd69d3c | 478 | seq_printf(m, " module:%s", |
a8d6f0a9 | 479 | module_name(serial->type->driver.owner)); |
6fd69d3c | 480 | seq_printf(m, " name:\"%s\"", |
a8d6f0a9 | 481 | serial->type->description); |
6fd69d3c | 482 | seq_printf(m, " vendor:%04x product:%04x", |
a8d6f0a9 AC |
483 | le16_to_cpu(serial->dev->descriptor.idVendor), |
484 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
6fd69d3c AD |
485 | seq_printf(m, " num_ports:%d", serial->num_ports); |
486 | seq_printf(m, " port:%d", i - serial->minor + 1); | |
1da177e4 | 487 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
6fd69d3c | 488 | seq_printf(m, " path:%s", tmp); |
a8d6f0a9 | 489 | |
6fd69d3c | 490 | seq_putc(m, '\n'); |
73e487fd | 491 | usb_serial_put(serial); |
8bc2c1b2 | 492 | mutex_unlock(&serial->disc_mutex); |
1da177e4 | 493 | } |
6fd69d3c | 494 | return 0; |
1da177e4 LT |
495 | } |
496 | ||
6fd69d3c AD |
497 | static int serial_proc_open(struct inode *inode, struct file *file) |
498 | { | |
499 | return single_open(file, serial_proc_show, NULL); | |
500 | } | |
501 | ||
502 | static const struct file_operations serial_proc_fops = { | |
503 | .owner = THIS_MODULE, | |
504 | .open = serial_proc_open, | |
505 | .read = seq_read, | |
506 | .llseek = seq_lseek, | |
507 | .release = single_release, | |
508 | }; | |
509 | ||
a8d6f0a9 | 510 | static int serial_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 511 | { |
81671ddb | 512 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 513 | |
441b62c1 | 514 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 515 | |
95da310e | 516 | WARN_ON(!port->port.count); |
1da177e4 | 517 | if (port->serial->type->tiocmget) |
95da310e | 518 | return port->serial->type->tiocmget(tty, file); |
1da177e4 LT |
519 | return -EINVAL; |
520 | } | |
521 | ||
a8d6f0a9 | 522 | static int serial_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
523 | unsigned int set, unsigned int clear) |
524 | { | |
81671ddb | 525 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 526 | |
441b62c1 | 527 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 528 | |
95da310e | 529 | WARN_ON(!port->port.count); |
1da177e4 | 530 | if (port->serial->type->tiocmset) |
95da310e | 531 | return port->serial->type->tiocmset(tty, file, set, clear); |
1da177e4 LT |
532 | return -EINVAL; |
533 | } | |
534 | ||
cf2c7481 PZ |
535 | /* |
536 | * We would be calling tty_wakeup here, but unfortunately some line | |
537 | * disciplines have an annoying habit of calling tty->write from | |
538 | * the write wakeup callback (e.g. n_hdlc.c). | |
539 | */ | |
540 | void usb_serial_port_softint(struct usb_serial_port *port) | |
541 | { | |
542 | schedule_work(&port->work); | |
543 | } | |
a8d6f0a9 | 544 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
cf2c7481 | 545 | |
c4028958 | 546 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 547 | { |
c4028958 DH |
548 | struct usb_serial_port *port = |
549 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
550 | struct tty_struct *tty; |
551 | ||
441b62c1 | 552 | dbg("%s - port %d", __func__, port->number); |
a8d6f0a9 | 553 | |
4a90f09b | 554 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
555 | if (!tty) |
556 | return; | |
557 | ||
558 | tty_wakeup(tty); | |
4a90f09b | 559 | tty_kref_put(tty); |
1da177e4 LT |
560 | } |
561 | ||
34ef50e5 | 562 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 563 | { |
1da177e4 | 564 | usb_kill_urb(port->read_urb); |
1da177e4 | 565 | usb_kill_urb(port->write_urb); |
5adceac5 ON |
566 | /* |
567 | * This is tricky. | |
568 | * Some drivers submit the read_urb in the | |
569 | * handler for the write_urb or vice versa | |
570 | * this order determines the order in which | |
571 | * usb_kill_urb() must be used to reliably | |
572 | * kill the URBs. As it is unknown here, | |
573 | * both orders must be used in turn. | |
574 | * The call below is not redundant. | |
575 | */ | |
576 | usb_kill_urb(port->read_urb); | |
1da177e4 | 577 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 578 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
579 | } |
580 | ||
41bd34dd | 581 | static void port_release(struct device *dev) |
34ef50e5 | 582 | { |
41bd34dd AS |
583 | struct usb_serial_port *port = to_usb_serial_port(dev); |
584 | ||
585 | dbg ("%s - %s", __func__, dev_name(dev)); | |
586 | ||
2d93148a AS |
587 | /* |
588 | * Stop all the traffic before cancelling the work, so that | |
589 | * nobody will restart it by calling usb_serial_port_softint. | |
590 | */ | |
34ef50e5 | 591 | kill_traffic(port); |
2d93148a AS |
592 | cancel_work_sync(&port->work); |
593 | ||
34ef50e5 ON |
594 | usb_free_urb(port->read_urb); |
595 | usb_free_urb(port->write_urb); | |
596 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 | 597 | usb_free_urb(port->interrupt_out_urb); |
119eecc8 | 598 | kfifo_free(&port->write_fifo); |
1da177e4 LT |
599 | kfree(port->bulk_in_buffer); |
600 | kfree(port->bulk_out_buffer); | |
601 | kfree(port->interrupt_in_buffer); | |
602 | kfree(port->interrupt_out_buffer); | |
603 | kfree(port); | |
604 | } | |
605 | ||
a8d6f0a9 AC |
606 | static struct usb_serial *create_serial(struct usb_device *dev, |
607 | struct usb_interface *interface, | |
608 | struct usb_serial_driver *driver) | |
1da177e4 LT |
609 | { |
610 | struct usb_serial *serial; | |
611 | ||
80b6ca48 | 612 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 613 | if (!serial) { |
441b62c1 | 614 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
615 | return NULL; |
616 | } | |
1da177e4 | 617 | serial->dev = usb_get_dev(dev); |
ea65370d | 618 | serial->type = driver; |
1da177e4 LT |
619 | serial->interface = interface; |
620 | kref_init(&serial->kref); | |
a1cd7e99 | 621 | mutex_init(&serial->disc_mutex); |
0282b7f2 | 622 | serial->minor = SERIAL_TTY_NO_MINOR; |
1da177e4 LT |
623 | |
624 | return serial; | |
625 | } | |
626 | ||
93bacefc | 627 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 628 | struct usb_serial_driver *drv) |
93bacefc GKH |
629 | { |
630 | struct usb_dynid *dynid; | |
631 | ||
632 | spin_lock(&drv->dynids.lock); | |
633 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
634 | if (usb_match_one_id(intf, &dynid->id)) { | |
635 | spin_unlock(&drv->dynids.lock); | |
636 | return &dynid->id; | |
637 | } | |
638 | } | |
639 | spin_unlock(&drv->dynids.lock); | |
640 | return NULL; | |
641 | } | |
642 | ||
643 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
644 | struct usb_interface *intf) | |
645 | { | |
646 | const struct usb_device_id *id; | |
647 | ||
648 | id = usb_match_id(intf, drv->id_table); | |
649 | if (id) { | |
650 | dbg("static descriptor matches"); | |
651 | goto exit; | |
652 | } | |
653 | id = match_dynamic_id(intf, drv); | |
654 | if (id) | |
655 | dbg("dynamic descriptor matches"); | |
656 | exit: | |
657 | return id; | |
658 | } | |
659 | ||
a8d6f0a9 AC |
660 | static struct usb_serial_driver *search_serial_device( |
661 | struct usb_interface *iface) | |
1da177e4 | 662 | { |
1da177e4 | 663 | const struct usb_device_id *id; |
063a2da8 | 664 | struct usb_serial_driver *drv; |
1da177e4 | 665 | |
93b1fae4 | 666 | /* Check if the usb id matches a known device */ |
063a2da8 AS |
667 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
668 | id = get_iface_id(drv, iface); | |
93bacefc | 669 | if (id) |
063a2da8 | 670 | return drv; |
1da177e4 LT |
671 | } |
672 | ||
673 | return NULL; | |
674 | } | |
675 | ||
335f8514 AC |
676 | static int serial_carrier_raised(struct tty_port *port) |
677 | { | |
678 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
679 | struct usb_serial_driver *drv = p->serial->type; | |
680 | if (drv->carrier_raised) | |
681 | return drv->carrier_raised(p); | |
682 | /* No carrier control - don't block */ | |
683 | return 1; | |
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; | |
690 | if (drv->dtr_rts) | |
691 | drv->dtr_rts(p, on); | |
692 | } | |
693 | ||
694 | static const struct tty_port_operations serial_port_ops = { | |
695 | .carrier_raised = serial_carrier_raised, | |
696 | .dtr_rts = serial_dtr_rts, | |
64bc3979 | 697 | .activate = serial_activate, |
e1108a63 | 698 | .shutdown = serial_down, |
335f8514 AC |
699 | }; |
700 | ||
1da177e4 LT |
701 | int usb_serial_probe(struct usb_interface *interface, |
702 | const struct usb_device_id *id) | |
703 | { | |
a8d6f0a9 | 704 | struct usb_device *dev = interface_to_usbdev(interface); |
1da177e4 LT |
705 | struct usb_serial *serial = NULL; |
706 | struct usb_serial_port *port; | |
707 | struct usb_host_interface *iface_desc; | |
708 | struct usb_endpoint_descriptor *endpoint; | |
709 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
710 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
711 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
712 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 713 | struct usb_serial_driver *type = NULL; |
1da177e4 | 714 | int retval; |
dd9ca5d9 | 715 | unsigned int minor; |
1da177e4 LT |
716 | int buffer_size; |
717 | int i; | |
718 | int num_interrupt_in = 0; | |
719 | int num_interrupt_out = 0; | |
720 | int num_bulk_in = 0; | |
721 | int num_bulk_out = 0; | |
722 | int num_ports = 0; | |
723 | int max_endpoints; | |
724 | ||
4b10f0f3 | 725 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
726 | type = search_serial_device(interface); |
727 | if (!type) { | |
4b10f0f3 | 728 | unlock_kernel(); |
1da177e4 LT |
729 | dbg("none matched"); |
730 | return -ENODEV; | |
731 | } | |
732 | ||
a8d6f0a9 | 733 | serial = create_serial(dev, interface, type); |
1da177e4 | 734 | if (!serial) { |
4b10f0f3 | 735 | unlock_kernel(); |
441b62c1 | 736 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
737 | return -ENOMEM; |
738 | } | |
739 | ||
740 | /* if this device type has a probe function, call it */ | |
741 | if (type->probe) { | |
742 | const struct usb_device_id *id; | |
743 | ||
18fcac35 | 744 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 745 | unlock_kernel(); |
a8d6f0a9 AC |
746 | dev_err(&interface->dev, |
747 | "module get failed, exiting\n"); | |
748 | kfree(serial); | |
1da177e4 LT |
749 | return -EIO; |
750 | } | |
751 | ||
93bacefc | 752 | id = get_iface_id(type, interface); |
1da177e4 | 753 | retval = type->probe(serial, id); |
18fcac35 | 754 | module_put(type->driver.owner); |
1da177e4 LT |
755 | |
756 | if (retval) { | |
4b10f0f3 | 757 | unlock_kernel(); |
a8d6f0a9 AC |
758 | dbg("sub driver rejected device"); |
759 | kfree(serial); | |
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) { | |
4b10f0f3 | 829 | unlock_kernel(); |
1da177e4 | 830 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
a8d6f0a9 | 831 | kfree(serial); |
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) { | |
4b10f0f3 | 842 | unlock_kernel(); |
a8d6f0a9 AC |
843 | dev_err(&interface->dev, |
844 | "Generic device with no bulk out, not allowed.\n"); | |
845 | kfree(serial); | |
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 */ | |
852 | if (type->calc_num_ports) { | |
18fcac35 | 853 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 854 | unlock_kernel(); |
a8d6f0a9 AC |
855 | dev_err(&interface->dev, |
856 | "module get failed, exiting\n"); | |
857 | kfree(serial); | |
1da177e4 LT |
858 | return -EIO; |
859 | } | |
a8d6f0a9 | 860 | num_ports = type->calc_num_ports(serial); |
18fcac35 | 861 | module_put(type->driver.owner); |
1da177e4 LT |
862 | } |
863 | if (!num_ports) | |
864 | num_ports = type->num_ports; | |
865 | } | |
866 | ||
1da177e4 LT |
867 | serial->num_ports = num_ports; |
868 | serial->num_bulk_in = num_bulk_in; | |
869 | serial->num_bulk_out = num_bulk_out; | |
870 | serial->num_interrupt_in = num_interrupt_in; | |
871 | serial->num_interrupt_out = num_interrupt_out; | |
872 | ||
063a2da8 AS |
873 | /* found all that we need */ |
874 | dev_info(&interface->dev, "%s converter detected\n", | |
875 | type->description); | |
876 | ||
1da177e4 | 877 | /* create our ports, we need as many as the max endpoints */ |
a8d6f0a9 AC |
878 | /* we don't use num_ports here because some devices have more |
879 | endpoint pairs than ports */ | |
1da177e4 LT |
880 | max_endpoints = max(num_bulk_in, num_bulk_out); |
881 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
882 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
883 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
884 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
885 | unlock_kernel(); |
886 | ||
a8d6f0a9 AC |
887 | dbg("%s - setting up %d port structures for this device", |
888 | __func__, max_endpoints); | |
1da177e4 | 889 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 890 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
891 | if (!port) |
892 | goto probe_error; | |
4a90f09b | 893 | tty_port_init(&port->port); |
335f8514 | 894 | port->port.ops = &serial_port_ops; |
1da177e4 | 895 | port->serial = serial; |
507ca9bc | 896 | spin_lock_init(&port->lock); |
e1108a63 AC |
897 | /* Keep this for private driver use for the moment but |
898 | should probably go away */ | |
c4028958 | 899 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 | 900 | serial->port[i] = port; |
41bd34dd AS |
901 | port->dev.parent = &interface->dev; |
902 | port->dev.driver = NULL; | |
903 | port->dev.bus = &usb_serial_bus_type; | |
904 | port->dev.release = &port_release; | |
905 | device_initialize(&port->dev); | |
1da177e4 LT |
906 | } |
907 | ||
908 | /* set up the endpoint information */ | |
909 | for (i = 0; i < num_bulk_in; ++i) { | |
910 | endpoint = bulk_in_endpoint[i]; | |
911 | port = serial->port[i]; | |
a8d6f0a9 | 912 | port->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
1da177e4 LT |
913 | if (!port->read_urb) { |
914 | dev_err(&interface->dev, "No free urbs available\n"); | |
915 | goto probe_error; | |
916 | } | |
917 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
918 | port->bulk_in_size = buffer_size; | |
919 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 920 | port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 921 | if (!port->bulk_in_buffer) { |
a8d6f0a9 AC |
922 | dev_err(&interface->dev, |
923 | "Couldn't allocate bulk_in_buffer\n"); | |
1da177e4 LT |
924 | goto probe_error; |
925 | } | |
a8d6f0a9 AC |
926 | usb_fill_bulk_urb(port->read_urb, dev, |
927 | usb_rcvbulkpipe(dev, | |
928 | endpoint->bEndpointAddress), | |
929 | port->bulk_in_buffer, buffer_size, | |
930 | serial->type->read_bulk_callback, port); | |
1da177e4 LT |
931 | } |
932 | ||
933 | for (i = 0; i < num_bulk_out; ++i) { | |
934 | endpoint = bulk_out_endpoint[i]; | |
935 | port = serial->port[i]; | |
936 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
937 | if (!port->write_urb) { | |
938 | dev_err(&interface->dev, "No free urbs available\n"); | |
939 | goto probe_error; | |
940 | } | |
119eecc8 | 941 | if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL)) |
8e8dce06 | 942 | goto probe_error; |
1da177e4 LT |
943 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
944 | port->bulk_out_size = buffer_size; | |
945 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 946 | port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 947 | if (!port->bulk_out_buffer) { |
a8d6f0a9 AC |
948 | dev_err(&interface->dev, |
949 | "Couldn't allocate bulk_out_buffer\n"); | |
1da177e4 LT |
950 | goto probe_error; |
951 | } | |
a8d6f0a9 AC |
952 | usb_fill_bulk_urb(port->write_urb, dev, |
953 | usb_sndbulkpipe(dev, | |
954 | endpoint->bEndpointAddress), | |
955 | port->bulk_out_buffer, buffer_size, | |
956 | serial->type->write_bulk_callback, port); | |
1da177e4 LT |
957 | } |
958 | ||
959 | if (serial->type->read_int_callback) { | |
960 | for (i = 0; i < num_interrupt_in; ++i) { | |
961 | endpoint = interrupt_in_endpoint[i]; | |
962 | port = serial->port[i]; | |
963 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
964 | if (!port->interrupt_in_urb) { | |
a8d6f0a9 AC |
965 | dev_err(&interface->dev, |
966 | "No free urbs available\n"); | |
1da177e4 LT |
967 | goto probe_error; |
968 | } | |
969 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
a8d6f0a9 AC |
970 | port->interrupt_in_endpointAddress = |
971 | endpoint->bEndpointAddress; | |
972 | port->interrupt_in_buffer = kmalloc(buffer_size, | |
973 | GFP_KERNEL); | |
1da177e4 | 974 | if (!port->interrupt_in_buffer) { |
a8d6f0a9 AC |
975 | dev_err(&interface->dev, |
976 | "Couldn't allocate interrupt_in_buffer\n"); | |
1da177e4 LT |
977 | goto probe_error; |
978 | } | |
a8d6f0a9 AC |
979 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
980 | usb_rcvintpipe(dev, | |
981 | endpoint->bEndpointAddress), | |
982 | port->interrupt_in_buffer, buffer_size, | |
983 | serial->type->read_int_callback, port, | |
984 | endpoint->bInterval); | |
1da177e4 LT |
985 | } |
986 | } else if (num_interrupt_in) { | |
987 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
988 | } | |
a8d6f0a9 | 989 | |
1da177e4 LT |
990 | if (serial->type->write_int_callback) { |
991 | for (i = 0; i < num_interrupt_out; ++i) { | |
992 | endpoint = interrupt_out_endpoint[i]; | |
993 | port = serial->port[i]; | |
994 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
995 | if (!port->interrupt_out_urb) { | |
a8d6f0a9 AC |
996 | dev_err(&interface->dev, |
997 | "No free urbs available\n"); | |
1da177e4 LT |
998 | goto probe_error; |
999 | } | |
1000 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
1001 | port->interrupt_out_size = buffer_size; | |
a8d6f0a9 AC |
1002 | port->interrupt_out_endpointAddress = |
1003 | endpoint->bEndpointAddress; | |
1004 | port->interrupt_out_buffer = kmalloc(buffer_size, | |
1005 | GFP_KERNEL); | |
1da177e4 | 1006 | if (!port->interrupt_out_buffer) { |
a8d6f0a9 AC |
1007 | dev_err(&interface->dev, |
1008 | "Couldn't allocate interrupt_out_buffer\n"); | |
1da177e4 LT |
1009 | goto probe_error; |
1010 | } | |
a8d6f0a9 AC |
1011 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
1012 | usb_sndintpipe(dev, | |
1013 | endpoint->bEndpointAddress), | |
1014 | port->interrupt_out_buffer, buffer_size, | |
1015 | serial->type->write_int_callback, port, | |
1016 | endpoint->bInterval); | |
1da177e4 LT |
1017 | } |
1018 | } else if (num_interrupt_out) { | |
1019 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
1020 | } | |
a8d6f0a9 | 1021 | |
1da177e4 LT |
1022 | /* if this device type has an attach function, call it */ |
1023 | if (type->attach) { | |
18fcac35 | 1024 | if (!try_module_get(type->driver.owner)) { |
a8d6f0a9 AC |
1025 | dev_err(&interface->dev, |
1026 | "module get failed, exiting\n"); | |
1da177e4 LT |
1027 | goto probe_error; |
1028 | } | |
a8d6f0a9 | 1029 | retval = type->attach(serial); |
18fcac35 | 1030 | module_put(type->driver.owner); |
1da177e4 LT |
1031 | if (retval < 0) |
1032 | goto probe_error; | |
a4720c65 | 1033 | serial->attached = 1; |
1da177e4 | 1034 | if (retval > 0) { |
a8d6f0a9 AC |
1035 | /* quietly accept this device, but don't bind to a |
1036 | serial port as it's about to disappear */ | |
0a3c8549 | 1037 | serial->num_ports = 0; |
1da177e4 LT |
1038 | goto exit; |
1039 | } | |
a4720c65 AS |
1040 | } else { |
1041 | serial->attached = 1; | |
1da177e4 LT |
1042 | } |
1043 | ||
a8d6f0a9 | 1044 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
34ef50e5 ON |
1045 | dev_err(&interface->dev, "No more free serial devices\n"); |
1046 | goto probe_error; | |
1047 | } | |
c744f99e | 1048 | serial->minor = minor; |
34ef50e5 | 1049 | |
1da177e4 LT |
1050 | /* register all of the individual ports with the driver core */ |
1051 | for (i = 0; i < num_ports; ++i) { | |
1052 | port = serial->port[i]; | |
0031a06e | 1053 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
7071a3ce | 1054 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
c706ebdf | 1055 | port->dev_state = PORT_REGISTERING; |
41bd34dd | 1056 | retval = device_add(&port->dev); |
c706ebdf | 1057 | if (retval) { |
13f4db9e GKH |
1058 | dev_err(&port->dev, "Error registering port device, " |
1059 | "continuing\n"); | |
c706ebdf AS |
1060 | port->dev_state = PORT_UNREGISTERED; |
1061 | } else { | |
1062 | port->dev_state = PORT_REGISTERED; | |
1063 | } | |
1da177e4 LT |
1064 | } |
1065 | ||
a8d6f0a9 | 1066 | usb_serial_console_init(debug, minor); |
1da177e4 LT |
1067 | |
1068 | exit: | |
1069 | /* success */ | |
a8d6f0a9 | 1070 | usb_set_intfdata(interface, serial); |
1da177e4 LT |
1071 | return 0; |
1072 | ||
1073 | probe_error: | |
41bd34dd | 1074 | usb_serial_put(serial); |
1da177e4 LT |
1075 | return -EIO; |
1076 | } | |
a8d6f0a9 | 1077 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
1da177e4 LT |
1078 | |
1079 | void usb_serial_disconnect(struct usb_interface *interface) | |
1080 | { | |
1081 | int i; | |
a8d6f0a9 | 1082 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1083 | struct device *dev = &interface->dev; |
1084 | struct usb_serial_port *port; | |
1085 | ||
73e487fd | 1086 | usb_serial_console_disconnect(serial); |
a8d6f0a9 | 1087 | dbg("%s", __func__); |
1da177e4 | 1088 | |
a1cd7e99 | 1089 | mutex_lock(&serial->disc_mutex); |
a8d6f0a9 | 1090 | usb_set_intfdata(interface, NULL); |
a1cd7e99 ON |
1091 | /* must set a flag, to signal subdrivers */ |
1092 | serial->disconnected = 1; | |
2d93148a AS |
1093 | mutex_unlock(&serial->disc_mutex); |
1094 | ||
a1cd7e99 ON |
1095 | for (i = 0; i < serial->num_ports; ++i) { |
1096 | port = serial->port[i]; | |
1097 | if (port) { | |
4a90f09b AC |
1098 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1099 | if (tty) { | |
d2b39182 | 1100 | tty_vhangup(tty); |
4a90f09b AC |
1101 | tty_kref_put(tty); |
1102 | } | |
a1cd7e99 | 1103 | kill_traffic(port); |
2d93148a | 1104 | cancel_work_sync(&port->work); |
c706ebdf AS |
1105 | if (port->dev_state == PORT_REGISTERED) { |
1106 | ||
1107 | /* Make sure the port is bound so that the | |
1108 | * driver's port_remove method is called. | |
1109 | */ | |
1110 | if (!port->dev.driver) { | |
1111 | int rc; | |
1112 | ||
1113 | port->dev.driver = | |
1114 | &serial->type->driver; | |
1115 | rc = device_bind_driver(&port->dev); | |
1116 | } | |
1117 | port->dev_state = PORT_UNREGISTERING; | |
1118 | device_del(&port->dev); | |
1119 | port->dev_state = PORT_UNREGISTERED; | |
1120 | } | |
2d93148a AS |
1121 | } |
1122 | } | |
f9c99bb8 | 1123 | serial->type->disconnect(serial); |
2d93148a | 1124 | |
41bd34dd | 1125 | /* let the last holder of this object cause it to be cleaned up */ |
a1cd7e99 | 1126 | usb_serial_put(serial); |
1da177e4 LT |
1127 | dev_info(dev, "device disconnected\n"); |
1128 | } | |
a8d6f0a9 | 1129 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
1da177e4 | 1130 | |
ec22559e ON |
1131 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1132 | { | |
1133 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1134 | struct usb_serial_port *port; | |
1135 | int i, r = 0; | |
1136 | ||
f8bece8d ON |
1137 | serial->suspending = 1; |
1138 | ||
81e5b23c ON |
1139 | if (serial->type->suspend) { |
1140 | r = serial->type->suspend(serial, message); | |
a5f6005d ON |
1141 | if (r < 0) { |
1142 | serial->suspending = 0; | |
81e5b23c | 1143 | goto err_out; |
a5f6005d | 1144 | } |
81e5b23c ON |
1145 | } |
1146 | ||
e31c1880 ON |
1147 | for (i = 0; i < serial->num_ports; ++i) { |
1148 | port = serial->port[i]; | |
1149 | if (port) | |
1150 | kill_traffic(port); | |
ec22559e ON |
1151 | } |
1152 | ||
81e5b23c | 1153 | err_out: |
ec22559e ON |
1154 | return r; |
1155 | } | |
1156 | EXPORT_SYMBOL(usb_serial_suspend); | |
1157 | ||
1158 | int usb_serial_resume(struct usb_interface *intf) | |
1159 | { | |
1160 | struct usb_serial *serial = usb_get_intfdata(intf); | |
c49cfa91 | 1161 | int rv; |
ec22559e | 1162 | |
f8bece8d | 1163 | serial->suspending = 0; |
8abaee23 | 1164 | if (serial->type->resume) |
c49cfa91 ON |
1165 | rv = serial->type->resume(serial); |
1166 | else | |
1167 | rv = usb_serial_generic_resume(serial); | |
f8bece8d | 1168 | |
c49cfa91 | 1169 | return rv; |
ec22559e ON |
1170 | } |
1171 | EXPORT_SYMBOL(usb_serial_resume); | |
1172 | ||
b68e31d0 | 1173 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1174 | .open = serial_open, |
1175 | .close = serial_close, | |
1176 | .write = serial_write, | |
335f8514 | 1177 | .hangup = serial_hangup, |
1da177e4 LT |
1178 | .write_room = serial_write_room, |
1179 | .ioctl = serial_ioctl, | |
1180 | .set_termios = serial_set_termios, | |
1181 | .throttle = serial_throttle, | |
1182 | .unthrottle = serial_unthrottle, | |
1183 | .break_ctl = serial_break, | |
1184 | .chars_in_buffer = serial_chars_in_buffer, | |
1da177e4 LT |
1185 | .tiocmget = serial_tiocmget, |
1186 | .tiocmset = serial_tiocmset, | |
f278a2f7 | 1187 | .cleanup = serial_cleanup, |
fe1ae7fd | 1188 | .install = serial_install, |
6fd69d3c | 1189 | .proc_fops = &serial_proc_fops, |
1da177e4 LT |
1190 | }; |
1191 | ||
335f8514 | 1192 | |
1da177e4 LT |
1193 | struct tty_driver *usb_serial_tty_driver; |
1194 | ||
1195 | static int __init usb_serial_init(void) | |
1196 | { | |
1197 | int i; | |
1198 | int result; | |
1199 | ||
1200 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1201 | if (!usb_serial_tty_driver) | |
1202 | return -ENOMEM; | |
1203 | ||
1204 | /* Initialize our global data */ | |
a8d6f0a9 | 1205 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
1da177e4 | 1206 | serial_table[i] = NULL; |
1da177e4 LT |
1207 | |
1208 | result = bus_register(&usb_serial_bus_type); | |
1209 | if (result) { | |
194343d9 GKH |
1210 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
1211 | "failed\n", __func__); | |
1da177e4 LT |
1212 | goto exit_bus; |
1213 | } | |
1214 | ||
1da177e4 LT |
1215 | usb_serial_tty_driver->owner = THIS_MODULE; |
1216 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1217 | usb_serial_tty_driver->name = "ttyUSB"; |
1218 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1219 | usb_serial_tty_driver->minor_start = 0; | |
1220 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1221 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1222 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1223 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1224 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1225 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1226 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1227 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1228 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1229 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1230 | result = tty_register_driver(usb_serial_tty_driver); | |
1231 | if (result) { | |
194343d9 GKH |
1232 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
1233 | __func__); | |
1da177e4 LT |
1234 | goto exit_reg_driver; |
1235 | } | |
1236 | ||
1237 | /* register the USB driver */ | |
1238 | result = usb_register(&usb_serial_driver); | |
1239 | if (result < 0) { | |
194343d9 GKH |
1240 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
1241 | __func__); | |
1da177e4 LT |
1242 | goto exit_tty; |
1243 | } | |
1244 | ||
06299db3 GKH |
1245 | /* register the generic driver, if we should */ |
1246 | result = usb_serial_generic_register(debug); | |
1247 | if (result < 0) { | |
194343d9 GKH |
1248 | printk(KERN_ERR "usb-serial: %s - registering generic " |
1249 | "driver failed\n", __func__); | |
06299db3 GKH |
1250 | goto exit_generic; |
1251 | } | |
1252 | ||
c197a8db | 1253 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1254 | |
1255 | return result; | |
1256 | ||
06299db3 GKH |
1257 | exit_generic: |
1258 | usb_deregister(&usb_serial_driver); | |
1259 | ||
1da177e4 LT |
1260 | exit_tty: |
1261 | tty_unregister_driver(usb_serial_tty_driver); | |
1262 | ||
1263 | exit_reg_driver: | |
1da177e4 LT |
1264 | bus_unregister(&usb_serial_bus_type); |
1265 | ||
1266 | exit_bus: | |
194343d9 GKH |
1267 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
1268 | __func__, result); | |
1da177e4 LT |
1269 | put_tty_driver(usb_serial_tty_driver); |
1270 | return result; | |
1271 | } | |
1272 | ||
1273 | ||
1274 | static void __exit usb_serial_exit(void) | |
1275 | { | |
1276 | usb_serial_console_exit(); | |
1277 | ||
1278 | usb_serial_generic_deregister(); | |
1279 | ||
1280 | usb_deregister(&usb_serial_driver); | |
1281 | tty_unregister_driver(usb_serial_tty_driver); | |
1282 | put_tty_driver(usb_serial_tty_driver); | |
1283 | bus_unregister(&usb_serial_bus_type); | |
1284 | } | |
1285 | ||
1286 | ||
1287 | module_init(usb_serial_init); | |
1288 | module_exit(usb_serial_exit); | |
1289 | ||
1290 | #define set_to_generic_if_null(type, function) \ | |
1291 | do { \ | |
1292 | if (!type->function) { \ | |
1293 | type->function = usb_serial_generic_##function; \ | |
1294 | dbg("Had to override the " #function \ | |
a8d6f0a9 | 1295 | " usb serial operation with the generic one.");\ |
1da177e4 LT |
1296 | } \ |
1297 | } while (0) | |
1298 | ||
ea65370d | 1299 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1300 | { |
1301 | set_to_generic_if_null(device, open); | |
1302 | set_to_generic_if_null(device, write); | |
1303 | set_to_generic_if_null(device, close); | |
1304 | set_to_generic_if_null(device, write_room); | |
1305 | set_to_generic_if_null(device, chars_in_buffer); | |
1306 | set_to_generic_if_null(device, read_bulk_callback); | |
1307 | set_to_generic_if_null(device, write_bulk_callback); | |
f9c99bb8 AS |
1308 | set_to_generic_if_null(device, disconnect); |
1309 | set_to_generic_if_null(device, release); | |
1da177e4 LT |
1310 | } |
1311 | ||
a8d6f0a9 | 1312 | int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 | 1313 | { |
a8d6f0a9 | 1314 | /* must be called with BKL held */ |
1da177e4 LT |
1315 | int retval; |
1316 | ||
e4abe665 DY |
1317 | if (usb_disabled()) |
1318 | return -ENODEV; | |
1319 | ||
ea65370d | 1320 | fixup_generic(driver); |
1da177e4 | 1321 | |
269bda1c GKH |
1322 | if (!driver->description) |
1323 | driver->description = driver->driver.name; | |
1324 | ||
1da177e4 | 1325 | /* Add this device to our list of devices */ |
ea65370d | 1326 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1327 | |
ea65370d | 1328 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1329 | if (retval) { |
194343d9 GKH |
1330 | printk(KERN_ERR "usb-serial: problem %d when registering " |
1331 | "driver %s\n", retval, driver->description); | |
ea65370d | 1332 | list_del(&driver->driver_list); |
a8d6f0a9 | 1333 | } else |
c197a8db | 1334 | printk(KERN_INFO "USB Serial support registered for %s\n", |
a8d6f0a9 | 1335 | driver->description); |
1da177e4 LT |
1336 | |
1337 | return retval; | |
1338 | } | |
a8d6f0a9 | 1339 | EXPORT_SYMBOL_GPL(usb_serial_register); |
1da177e4 LT |
1340 | |
1341 | ||
a8d6f0a9 | 1342 | void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1343 | { |
a8d6f0a9 | 1344 | /* must be called with BKL held */ |
c197a8db GKH |
1345 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
1346 | device->description); | |
1da177e4 LT |
1347 | list_del(&device->driver_list); |
1348 | usb_serial_bus_deregister(device); | |
1349 | } | |
1da177e4 | 1350 | EXPORT_SYMBOL_GPL(usb_serial_deregister); |
1da177e4 LT |
1351 | |
1352 | /* Module information */ | |
a8d6f0a9 AC |
1353 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1354 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1355 | MODULE_LICENSE("GPL"); |
1356 | ||
1357 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1358 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |