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> |
1da177e4 LT |
38 | #include "pl2303.h" |
39 | ||
40 | /* | |
41 | * Version Information | |
42 | */ | |
1da177e4 LT |
43 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
44 | #define DRIVER_DESC "USB Serial Driver core" | |
45 | ||
34f8e761 PZ |
46 | static void port_free(struct usb_serial_port *port); |
47 | ||
1da177e4 LT |
48 | /* Driver structure we register with the USB core */ |
49 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
50 | .name = "usbserial", |
51 | .probe = usb_serial_probe, | |
52 | .disconnect = usb_serial_disconnect, | |
ec22559e ON |
53 | .suspend = usb_serial_suspend, |
54 | .resume = usb_serial_resume, | |
ba9dc657 | 55 | .no_dynamic_id = 1, |
1da177e4 LT |
56 | }; |
57 | ||
58 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
59 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
60 | cause the "hotplug" program to pull in whatever module is necessary | |
61 | via modprobe, and modprobe will load usbserial because the serial | |
62 | drivers depend on it. | |
63 | */ | |
64 | ||
65 | static int debug; | |
a8d6f0a9 AC |
66 | /* initially all NULL */ |
67 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; | |
3ddad823 | 68 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
69 | static LIST_HEAD(usb_serial_driver_list); |
70 | ||
71 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
72 | { | |
34ef50e5 ON |
73 | struct usb_serial *serial; |
74 | ||
3ddad823 | 75 | mutex_lock(&table_lock); |
34ef50e5 | 76 | serial = serial_table[index]; |
1da177e4 LT |
77 | |
78 | if (serial) | |
79 | kref_get(&serial->kref); | |
3ddad823 | 80 | mutex_unlock(&table_lock); |
1da177e4 LT |
81 | return serial; |
82 | } | |
83 | ||
a8d6f0a9 AC |
84 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
85 | int num_ports, unsigned int *minor) | |
1da177e4 LT |
86 | { |
87 | unsigned int i, j; | |
88 | int good_spot; | |
89 | ||
441b62c1 | 90 | dbg("%s %d", __func__, num_ports); |
1da177e4 LT |
91 | |
92 | *minor = 0; | |
3ddad823 | 93 | mutex_lock(&table_lock); |
1da177e4 LT |
94 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
95 | if (serial_table[i]) | |
96 | continue; | |
97 | ||
98 | good_spot = 1; | |
99 | for (j = 1; j <= num_ports-1; ++j) | |
100 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
101 | good_spot = 0; | |
102 | i += j; | |
103 | break; | |
104 | } | |
105 | if (good_spot == 0) | |
106 | continue; | |
107 | ||
108 | *minor = i; | |
a1f721c8 | 109 | j = 0; |
441b62c1 | 110 | dbg("%s - minor base = %d", __func__, *minor); |
a1f721c8 | 111 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 112 | serial_table[i] = serial; |
a1f721c8 ON |
113 | serial->port[j++]->number = i; |
114 | } | |
3ddad823 | 115 | mutex_unlock(&table_lock); |
1da177e4 LT |
116 | return serial; |
117 | } | |
3ddad823 | 118 | mutex_unlock(&table_lock); |
1da177e4 LT |
119 | return NULL; |
120 | } | |
121 | ||
122 | static void return_serial(struct usb_serial *serial) | |
123 | { | |
124 | int i; | |
125 | ||
441b62c1 | 126 | dbg("%s", __func__); |
1da177e4 | 127 | |
a8d6f0a9 | 128 | for (i = 0; i < serial->num_ports; ++i) |
1da177e4 | 129 | serial_table[serial->minor + i] = NULL; |
1da177e4 LT |
130 | } |
131 | ||
132 | static void destroy_serial(struct kref *kref) | |
133 | { | |
134 | struct usb_serial *serial; | |
135 | struct usb_serial_port *port; | |
136 | int i; | |
137 | ||
138 | serial = to_usb_serial(kref); | |
139 | ||
441b62c1 | 140 | dbg("%s - %s", __func__, serial->type->description); |
1da177e4 | 141 | |
521b85ae | 142 | /* return the minor range that this device had */ |
0282b7f2 AS |
143 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
144 | return_serial(serial); | |
521b85ae | 145 | |
f9c99bb8 AS |
146 | serial->type->release(serial); |
147 | ||
148 | for (i = 0; i < serial->num_ports; ++i) { | |
149 | port = serial->port[i]; | |
150 | if (port) | |
151 | put_device(&port->dev); | |
152 | } | |
153 | ||
1da177e4 LT |
154 | /* If this is a "fake" port, we have to clean it up here, as it will |
155 | * not get cleaned up in port_release() as it was never registered with | |
156 | * the driver core */ | |
157 | if (serial->num_ports < serial->num_port_pointers) { | |
a8d6f0a9 AC |
158 | for (i = serial->num_ports; |
159 | i < serial->num_port_pointers; ++i) { | |
1da177e4 | 160 | port = serial->port[i]; |
f9c99bb8 AS |
161 | if (port) |
162 | port_free(port); | |
1da177e4 LT |
163 | } |
164 | } | |
165 | ||
166 | usb_put_dev(serial->dev); | |
167 | ||
168 | /* free up any memory that we allocated */ | |
a8d6f0a9 | 169 | kfree(serial); |
1da177e4 LT |
170 | } |
171 | ||
73e487fd GL |
172 | void usb_serial_put(struct usb_serial *serial) |
173 | { | |
3ddad823 | 174 | mutex_lock(&table_lock); |
73e487fd | 175 | kref_put(&serial->kref, destroy_serial); |
3ddad823 | 176 | mutex_unlock(&table_lock); |
73e487fd GL |
177 | } |
178 | ||
1da177e4 LT |
179 | /***************************************************************************** |
180 | * Driver tty interface functions | |
181 | *****************************************************************************/ | |
a8d6f0a9 | 182 | static int serial_open (struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
183 | { |
184 | struct usb_serial *serial; | |
185 | struct usb_serial_port *port; | |
186 | unsigned int portNumber; | |
2d93148a | 187 | int retval = 0; |
c56d3000 | 188 | int first = 0; |
a8d6f0a9 | 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 | ||
2d93148a | 199 | mutex_lock(&serial->disc_mutex); |
1da177e4 LT |
200 | portNumber = tty->index - serial->minor; |
201 | port = serial->port[portNumber]; | |
2d93148a | 202 | if (!port || serial->disconnected) |
331879fd | 203 | retval = -ENODEV; |
2d93148a AS |
204 | else |
205 | get_device(&port->dev); | |
206 | /* | |
207 | * Note: Our locking order requirement does not allow port->mutex | |
208 | * to be acquired while serial->disc_mutex is held. | |
209 | */ | |
210 | mutex_unlock(&serial->disc_mutex); | |
211 | if (retval) | |
212 | goto bailout_serial_put; | |
331879fd | 213 | |
71a84163 LFC |
214 | if (mutex_lock_interruptible(&port->mutex)) { |
215 | retval = -ERESTARTSYS; | |
2d93148a | 216 | goto bailout_port_put; |
71a84163 | 217 | } |
a8d6f0a9 | 218 | |
95da310e | 219 | ++port->port.count; |
1da177e4 | 220 | |
ca85485c PF |
221 | /* set up our port structure making the tty driver |
222 | * remember our port object, and us it */ | |
223 | tty->driver_data = port; | |
4a90f09b | 224 | tty_port_tty_set(&port->port, tty); |
1da177e4 | 225 | |
6e406121 JW |
226 | /* If the console is attached, the device is already open */ |
227 | if (port->port.count == 1 && !port->console) { | |
c56d3000 | 228 | first = 1; |
1da177e4 LT |
229 | /* lock this module before we call it |
230 | * this may fail, which means we must bail out, | |
231 | * safe because we are called with BKL held */ | |
18fcac35 | 232 | if (!try_module_get(serial->type->driver.owner)) { |
1da177e4 | 233 | retval = -ENODEV; |
71a84163 | 234 | goto bailout_mutex_unlock; |
1da177e4 LT |
235 | } |
236 | ||
2d93148a AS |
237 | mutex_lock(&serial->disc_mutex); |
238 | if (serial->disconnected) | |
239 | retval = -ENODEV; | |
240 | else | |
241 | retval = usb_autopm_get_interface(serial->interface); | |
f0fbd5b9 SS |
242 | if (retval) |
243 | goto bailout_module_put; | |
2d93148a | 244 | |
a8d6f0a9 | 245 | /* only call the device specific open if this |
1da177e4 | 246 | * is the first time the port is opened */ |
95da310e | 247 | retval = serial->type->open(tty, port, filp); |
1da177e4 | 248 | if (retval) |
f0fbd5b9 | 249 | goto bailout_interface_put; |
2d93148a | 250 | mutex_unlock(&serial->disc_mutex); |
c56d3000 | 251 | set_bit(ASYNCB_INITIALIZED, &port->port.flags); |
1da177e4 | 252 | } |
1ce7dd26 | 253 | mutex_unlock(&port->mutex); |
335f8514 AC |
254 | /* Now do the correct tty layer semantics */ |
255 | retval = tty_port_block_til_ready(&port->port, tty, filp); | |
c56d3000 AC |
256 | if (retval == 0) { |
257 | if (!first) | |
258 | usb_serial_put(serial); | |
335f8514 | 259 | return 0; |
c56d3000 AC |
260 | } |
261 | mutex_lock(&port->mutex); | |
262 | if (first == 0) | |
263 | goto bailout_mutex_unlock; | |
264 | /* Undo the initial port actions */ | |
265 | mutex_lock(&serial->disc_mutex); | |
f0fbd5b9 SS |
266 | bailout_interface_put: |
267 | usb_autopm_put_interface(serial->interface); | |
1da177e4 | 268 | bailout_module_put: |
2d93148a | 269 | mutex_unlock(&serial->disc_mutex); |
18fcac35 | 270 | module_put(serial->type->driver.owner); |
71a84163 | 271 | bailout_mutex_unlock: |
95da310e | 272 | port->port.count = 0; |
b059c81a | 273 | tty->driver_data = NULL; |
4a90f09b | 274 | tty_port_tty_set(&port->port, NULL); |
1ce7dd26 | 275 | mutex_unlock(&port->mutex); |
2d93148a AS |
276 | bailout_port_put: |
277 | put_device(&port->dev); | |
278 | bailout_serial_put: | |
73e487fd | 279 | usb_serial_put(serial); |
1da177e4 LT |
280 | return retval; |
281 | } | |
282 | ||
335f8514 AC |
283 | /** |
284 | * serial_do_down - shut down hardware | |
285 | * @port: port to shut down | |
286 | * | |
287 | * Shut down a USB port unless it is the console. We never shut down the | |
288 | * console hardware as it will always be in use. | |
289 | * | |
290 | * Don't free any resources at this point | |
291 | */ | |
292 | static void serial_do_down(struct usb_serial_port *port) | |
1da177e4 | 293 | { |
335f8514 | 294 | struct usb_serial_driver *drv = port->serial->type; |
2d93148a AS |
295 | struct usb_serial *serial; |
296 | struct module *owner; | |
1da177e4 | 297 | |
335f8514 AC |
298 | /* The console is magical, do not hang up the console hardware |
299 | or there will be tears */ | |
300 | if (port->console) | |
1da177e4 LT |
301 | return; |
302 | ||
1ce7dd26 | 303 | mutex_lock(&port->mutex); |
2d93148a AS |
304 | serial = port->serial; |
305 | owner = serial->type->driver.owner; | |
8a4613f0 | 306 | |
335f8514 AC |
307 | if (drv->close) |
308 | drv->close(port); | |
1da177e4 | 309 | |
1ce7dd26 | 310 | mutex_unlock(&port->mutex); |
335f8514 AC |
311 | } |
312 | ||
313 | /** | |
314 | * serial_do_free - free resources post close/hangup | |
315 | * @port: port to free up | |
316 | * | |
317 | * Do the resource freeing and refcount dropping for the port. We must | |
318 | * be careful about ordering and we must avoid freeing up the console. | |
4455e344 AC |
319 | * |
320 | * Called when the last tty kref is dropped. | |
335f8514 | 321 | */ |
2d93148a | 322 | |
4455e344 | 323 | static void serial_do_free(struct tty_struct *tty) |
335f8514 | 324 | { |
4455e344 | 325 | struct usb_serial_port *port = tty->driver_data; |
335f8514 AC |
326 | struct usb_serial *serial; |
327 | struct module *owner; | |
328 | ||
329 | /* The console is magical, do not hang up the console hardware | |
330 | or there will be tears */ | |
4455e344 | 331 | if (port == NULL || port->console) |
335f8514 AC |
332 | return; |
333 | ||
334 | serial = port->serial; | |
335 | owner = serial->type->driver.owner; | |
336 | put_device(&port->dev); | |
2d93148a | 337 | /* Mustn't dereference port any more */ |
335f8514 AC |
338 | mutex_lock(&serial->disc_mutex); |
339 | if (!serial->disconnected) | |
340 | usb_autopm_put_interface(serial->interface); | |
341 | mutex_unlock(&serial->disc_mutex); | |
2d93148a | 342 | usb_serial_put(serial); |
2d93148a | 343 | /* Mustn't dereference serial any more */ |
335f8514 AC |
344 | module_put(owner); |
345 | } | |
346 | ||
347 | static void serial_close(struct tty_struct *tty, struct file *filp) | |
348 | { | |
349 | struct usb_serial_port *port = tty->driver_data; | |
350 | ||
f4fa4468 TLSC |
351 | if (!port) |
352 | return; | |
353 | ||
335f8514 AC |
354 | dbg("%s - port %d", __func__, port->number); |
355 | ||
335f8514 AC |
356 | if (tty_port_close_start(&port->port, tty, filp) == 0) |
357 | return; | |
335f8514 AC |
358 | serial_do_down(port); |
359 | tty_port_close_end(&port->port, tty); | |
360 | tty_port_tty_set(&port->port, NULL); | |
4455e344 | 361 | |
335f8514 AC |
362 | } |
363 | ||
364 | static void serial_hangup(struct tty_struct *tty) | |
365 | { | |
366 | struct usb_serial_port *port = tty->driver_data; | |
367 | serial_do_down(port); | |
368 | tty_port_hangup(&port->port); | |
b68f2fb9 AC |
369 | /* We must not free port yet - the USB serial layer depends on it's |
370 | continued existence */ | |
1da177e4 LT |
371 | } |
372 | ||
a8d6f0a9 AC |
373 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
374 | int count) | |
1da177e4 | 375 | { |
81671ddb | 376 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 377 | int retval = -ENODEV; |
1da177e4 | 378 | |
f34d7a5b | 379 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
380 | goto exit; |
381 | ||
441b62c1 | 382 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
1da177e4 | 383 | |
95da310e | 384 | /* count is managed under the mutex lock for the tty so cannot |
a8d6f0a9 | 385 | drop to zero until after the last close completes */ |
95da310e | 386 | WARN_ON(!port->port.count); |
1da177e4 LT |
387 | |
388 | /* pass on to the driver specific version of this function */ | |
95da310e | 389 | retval = port->serial->type->write(tty, port, buf, count); |
1da177e4 LT |
390 | |
391 | exit: | |
392 | return retval; | |
393 | } | |
394 | ||
a8d6f0a9 | 395 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 396 | { |
81671ddb | 397 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 398 | dbg("%s - port %d", __func__, port->number); |
95da310e | 399 | WARN_ON(!port->port.count); |
1da177e4 | 400 | /* pass on to the driver specific version of this function */ |
95da310e | 401 | return port->serial->type->write_room(tty); |
1da177e4 LT |
402 | } |
403 | ||
a8d6f0a9 | 404 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 405 | { |
81671ddb | 406 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 407 | dbg("%s = port %d", __func__, port->number); |
1da177e4 | 408 | |
eff6937a AC |
409 | /* if the device was unplugged then any remaining characters |
410 | fell out of the connector ;) */ | |
411 | if (port->serial->disconnected) | |
412 | return 0; | |
1da177e4 | 413 | /* pass on to the driver specific version of this function */ |
95da310e | 414 | return port->serial->type->chars_in_buffer(tty); |
1da177e4 LT |
415 | } |
416 | ||
a8d6f0a9 | 417 | static void serial_throttle(struct tty_struct *tty) |
1da177e4 | 418 | { |
81671ddb | 419 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 420 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 421 | |
95da310e | 422 | WARN_ON(!port->port.count); |
1da177e4 LT |
423 | /* pass on to the driver specific version of this function */ |
424 | if (port->serial->type->throttle) | |
95da310e | 425 | port->serial->type->throttle(tty); |
1da177e4 LT |
426 | } |
427 | ||
a8d6f0a9 | 428 | static void serial_unthrottle(struct tty_struct *tty) |
1da177e4 | 429 | { |
81671ddb | 430 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 431 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 432 | |
95da310e | 433 | WARN_ON(!port->port.count); |
1da177e4 LT |
434 | /* pass on to the driver specific version of this function */ |
435 | if (port->serial->type->unthrottle) | |
95da310e | 436 | port->serial->type->unthrottle(tty); |
1da177e4 LT |
437 | } |
438 | ||
a8d6f0a9 AC |
439 | static int serial_ioctl(struct tty_struct *tty, struct file *file, |
440 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 441 | { |
81671ddb | 442 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
443 | int retval = -ENODEV; |
444 | ||
441b62c1 | 445 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 | 446 | |
95da310e | 447 | WARN_ON(!port->port.count); |
1da177e4 | 448 | |
a8d6f0a9 AC |
449 | /* pass on to the driver specific version of this function |
450 | if it is available */ | |
f34d7a5b | 451 | if (port->serial->type->ioctl) { |
95da310e | 452 | retval = port->serial->type->ioctl(tty, file, cmd, arg); |
a8d6f0a9 | 453 | } else |
1da177e4 | 454 | retval = -ENOIOCTLCMD; |
1da177e4 LT |
455 | return retval; |
456 | } | |
457 | ||
a8d6f0a9 | 458 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 459 | { |
81671ddb | 460 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 461 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 462 | |
95da310e | 463 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
464 | /* pass on to the driver specific version of this function |
465 | if it is available */ | |
1da177e4 | 466 | if (port->serial->type->set_termios) |
95da310e | 467 | port->serial->type->set_termios(tty, port, old); |
33785091 AC |
468 | else |
469 | tty_termios_copy_hw(tty->termios, old); | |
1da177e4 LT |
470 | } |
471 | ||
9e98966c | 472 | static int serial_break(struct tty_struct *tty, int break_state) |
1da177e4 | 473 | { |
81671ddb | 474 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 475 | |
441b62c1 | 476 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 477 | |
95da310e | 478 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
479 | /* pass on to the driver specific version of this function |
480 | if it is available */ | |
6b447f04 | 481 | if (port->serial->type->break_ctl) |
95da310e | 482 | port->serial->type->break_ctl(tty, break_state); |
9e98966c | 483 | return 0; |
1da177e4 LT |
484 | } |
485 | ||
6fd69d3c | 486 | static int serial_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
487 | { |
488 | struct usb_serial *serial; | |
1da177e4 | 489 | int i; |
1da177e4 LT |
490 | char tmp[40]; |
491 | ||
441b62c1 | 492 | dbg("%s", __func__); |
6fd69d3c AD |
493 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
494 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1da177e4 LT |
495 | serial = usb_serial_get_by_index(i); |
496 | if (serial == NULL) | |
497 | continue; | |
498 | ||
6fd69d3c | 499 | seq_printf(m, "%d:", i); |
18fcac35 | 500 | if (serial->type->driver.owner) |
6fd69d3c | 501 | seq_printf(m, " module:%s", |
a8d6f0a9 | 502 | module_name(serial->type->driver.owner)); |
6fd69d3c | 503 | seq_printf(m, " name:\"%s\"", |
a8d6f0a9 | 504 | serial->type->description); |
6fd69d3c | 505 | seq_printf(m, " vendor:%04x product:%04x", |
a8d6f0a9 AC |
506 | le16_to_cpu(serial->dev->descriptor.idVendor), |
507 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
6fd69d3c AD |
508 | seq_printf(m, " num_ports:%d", serial->num_ports); |
509 | seq_printf(m, " port:%d", i - serial->minor + 1); | |
1da177e4 | 510 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
6fd69d3c | 511 | seq_printf(m, " path:%s", tmp); |
a8d6f0a9 | 512 | |
6fd69d3c | 513 | seq_putc(m, '\n'); |
73e487fd | 514 | usb_serial_put(serial); |
1da177e4 | 515 | } |
6fd69d3c | 516 | return 0; |
1da177e4 LT |
517 | } |
518 | ||
6fd69d3c AD |
519 | static int serial_proc_open(struct inode *inode, struct file *file) |
520 | { | |
521 | return single_open(file, serial_proc_show, NULL); | |
522 | } | |
523 | ||
524 | static const struct file_operations serial_proc_fops = { | |
525 | .owner = THIS_MODULE, | |
526 | .open = serial_proc_open, | |
527 | .read = seq_read, | |
528 | .llseek = seq_lseek, | |
529 | .release = single_release, | |
530 | }; | |
531 | ||
a8d6f0a9 | 532 | static int serial_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 533 | { |
81671ddb | 534 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 535 | |
441b62c1 | 536 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 537 | |
95da310e | 538 | WARN_ON(!port->port.count); |
1da177e4 | 539 | if (port->serial->type->tiocmget) |
95da310e | 540 | return port->serial->type->tiocmget(tty, file); |
1da177e4 LT |
541 | return -EINVAL; |
542 | } | |
543 | ||
a8d6f0a9 | 544 | static int serial_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
545 | unsigned int set, unsigned int clear) |
546 | { | |
81671ddb | 547 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 548 | |
441b62c1 | 549 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 550 | |
95da310e | 551 | WARN_ON(!port->port.count); |
1da177e4 | 552 | if (port->serial->type->tiocmset) |
95da310e | 553 | return port->serial->type->tiocmset(tty, file, set, clear); |
1da177e4 LT |
554 | return -EINVAL; |
555 | } | |
556 | ||
cf2c7481 PZ |
557 | /* |
558 | * We would be calling tty_wakeup here, but unfortunately some line | |
559 | * disciplines have an annoying habit of calling tty->write from | |
560 | * the write wakeup callback (e.g. n_hdlc.c). | |
561 | */ | |
562 | void usb_serial_port_softint(struct usb_serial_port *port) | |
563 | { | |
564 | schedule_work(&port->work); | |
565 | } | |
a8d6f0a9 | 566 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
cf2c7481 | 567 | |
c4028958 | 568 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 569 | { |
c4028958 DH |
570 | struct usb_serial_port *port = |
571 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
572 | struct tty_struct *tty; |
573 | ||
441b62c1 | 574 | dbg("%s - port %d", __func__, port->number); |
a8d6f0a9 | 575 | |
4a90f09b | 576 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
577 | if (!tty) |
578 | return; | |
579 | ||
580 | tty_wakeup(tty); | |
4a90f09b | 581 | tty_kref_put(tty); |
1da177e4 LT |
582 | } |
583 | ||
584 | static void port_release(struct device *dev) | |
585 | { | |
586 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
587 | ||
7071a3ce | 588 | dbg ("%s - %s", __func__, dev_name(dev)); |
34f8e761 PZ |
589 | port_free(port); |
590 | } | |
591 | ||
34ef50e5 | 592 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 593 | { |
1da177e4 | 594 | usb_kill_urb(port->read_urb); |
1da177e4 | 595 | usb_kill_urb(port->write_urb); |
5adceac5 ON |
596 | /* |
597 | * This is tricky. | |
598 | * Some drivers submit the read_urb in the | |
599 | * handler for the write_urb or vice versa | |
600 | * this order determines the order in which | |
601 | * usb_kill_urb() must be used to reliably | |
602 | * kill the URBs. As it is unknown here, | |
603 | * both orders must be used in turn. | |
604 | * The call below is not redundant. | |
605 | */ | |
606 | usb_kill_urb(port->read_urb); | |
1da177e4 | 607 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 608 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
609 | } |
610 | ||
611 | static void port_free(struct usb_serial_port *port) | |
612 | { | |
2d93148a AS |
613 | /* |
614 | * Stop all the traffic before cancelling the work, so that | |
615 | * nobody will restart it by calling usb_serial_port_softint. | |
616 | */ | |
34ef50e5 | 617 | kill_traffic(port); |
2d93148a AS |
618 | cancel_work_sync(&port->work); |
619 | ||
34ef50e5 ON |
620 | usb_free_urb(port->read_urb); |
621 | usb_free_urb(port->write_urb); | |
622 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 LT |
623 | usb_free_urb(port->interrupt_out_urb); |
624 | kfree(port->bulk_in_buffer); | |
625 | kfree(port->bulk_out_buffer); | |
626 | kfree(port->interrupt_in_buffer); | |
627 | kfree(port->interrupt_out_buffer); | |
628 | kfree(port); | |
629 | } | |
630 | ||
a8d6f0a9 AC |
631 | static struct usb_serial *create_serial(struct usb_device *dev, |
632 | struct usb_interface *interface, | |
633 | struct usb_serial_driver *driver) | |
1da177e4 LT |
634 | { |
635 | struct usb_serial *serial; | |
636 | ||
80b6ca48 | 637 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 638 | if (!serial) { |
441b62c1 | 639 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
640 | return NULL; |
641 | } | |
1da177e4 | 642 | serial->dev = usb_get_dev(dev); |
ea65370d | 643 | serial->type = driver; |
1da177e4 LT |
644 | serial->interface = interface; |
645 | kref_init(&serial->kref); | |
a1cd7e99 | 646 | mutex_init(&serial->disc_mutex); |
0282b7f2 | 647 | serial->minor = SERIAL_TTY_NO_MINOR; |
1da177e4 LT |
648 | |
649 | return serial; | |
650 | } | |
651 | ||
93bacefc | 652 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 653 | struct usb_serial_driver *drv) |
93bacefc GKH |
654 | { |
655 | struct usb_dynid *dynid; | |
656 | ||
657 | spin_lock(&drv->dynids.lock); | |
658 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
659 | if (usb_match_one_id(intf, &dynid->id)) { | |
660 | spin_unlock(&drv->dynids.lock); | |
661 | return &dynid->id; | |
662 | } | |
663 | } | |
664 | spin_unlock(&drv->dynids.lock); | |
665 | return NULL; | |
666 | } | |
667 | ||
668 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
669 | struct usb_interface *intf) | |
670 | { | |
671 | const struct usb_device_id *id; | |
672 | ||
673 | id = usb_match_id(intf, drv->id_table); | |
674 | if (id) { | |
675 | dbg("static descriptor matches"); | |
676 | goto exit; | |
677 | } | |
678 | id = match_dynamic_id(intf, drv); | |
679 | if (id) | |
680 | dbg("dynamic descriptor matches"); | |
681 | exit: | |
682 | return id; | |
683 | } | |
684 | ||
a8d6f0a9 AC |
685 | static struct usb_serial_driver *search_serial_device( |
686 | struct usb_interface *iface) | |
1da177e4 | 687 | { |
1da177e4 | 688 | const struct usb_device_id *id; |
063a2da8 | 689 | struct usb_serial_driver *drv; |
1da177e4 | 690 | |
93b1fae4 | 691 | /* Check if the usb id matches a known device */ |
063a2da8 AS |
692 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
693 | id = get_iface_id(drv, iface); | |
93bacefc | 694 | if (id) |
063a2da8 | 695 | return drv; |
1da177e4 LT |
696 | } |
697 | ||
698 | return NULL; | |
699 | } | |
700 | ||
335f8514 AC |
701 | static int serial_carrier_raised(struct tty_port *port) |
702 | { | |
703 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
704 | struct usb_serial_driver *drv = p->serial->type; | |
705 | if (drv->carrier_raised) | |
706 | return drv->carrier_raised(p); | |
707 | /* No carrier control - don't block */ | |
708 | return 1; | |
709 | } | |
710 | ||
711 | static void serial_dtr_rts(struct tty_port *port, int on) | |
712 | { | |
713 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
714 | struct usb_serial_driver *drv = p->serial->type; | |
715 | if (drv->dtr_rts) | |
716 | drv->dtr_rts(p, on); | |
717 | } | |
718 | ||
719 | static const struct tty_port_operations serial_port_ops = { | |
720 | .carrier_raised = serial_carrier_raised, | |
721 | .dtr_rts = serial_dtr_rts, | |
722 | }; | |
723 | ||
1da177e4 LT |
724 | int usb_serial_probe(struct usb_interface *interface, |
725 | const struct usb_device_id *id) | |
726 | { | |
a8d6f0a9 | 727 | struct usb_device *dev = interface_to_usbdev(interface); |
1da177e4 LT |
728 | struct usb_serial *serial = NULL; |
729 | struct usb_serial_port *port; | |
730 | struct usb_host_interface *iface_desc; | |
731 | struct usb_endpoint_descriptor *endpoint; | |
732 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
733 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
734 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
735 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 736 | struct usb_serial_driver *type = NULL; |
1da177e4 | 737 | int retval; |
dd9ca5d9 | 738 | unsigned int minor; |
1da177e4 LT |
739 | int buffer_size; |
740 | int i; | |
741 | int num_interrupt_in = 0; | |
742 | int num_interrupt_out = 0; | |
743 | int num_bulk_in = 0; | |
744 | int num_bulk_out = 0; | |
745 | int num_ports = 0; | |
746 | int max_endpoints; | |
747 | ||
4b10f0f3 | 748 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
749 | type = search_serial_device(interface); |
750 | if (!type) { | |
4b10f0f3 | 751 | unlock_kernel(); |
1da177e4 LT |
752 | dbg("none matched"); |
753 | return -ENODEV; | |
754 | } | |
755 | ||
a8d6f0a9 | 756 | serial = create_serial(dev, interface, type); |
1da177e4 | 757 | if (!serial) { |
4b10f0f3 | 758 | unlock_kernel(); |
441b62c1 | 759 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
760 | return -ENOMEM; |
761 | } | |
762 | ||
763 | /* if this device type has a probe function, call it */ | |
764 | if (type->probe) { | |
765 | const struct usb_device_id *id; | |
766 | ||
18fcac35 | 767 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 768 | unlock_kernel(); |
a8d6f0a9 AC |
769 | dev_err(&interface->dev, |
770 | "module get failed, exiting\n"); | |
771 | kfree(serial); | |
1da177e4 LT |
772 | return -EIO; |
773 | } | |
774 | ||
93bacefc | 775 | id = get_iface_id(type, interface); |
1da177e4 | 776 | retval = type->probe(serial, id); |
18fcac35 | 777 | module_put(type->driver.owner); |
1da177e4 LT |
778 | |
779 | if (retval) { | |
4b10f0f3 | 780 | unlock_kernel(); |
a8d6f0a9 AC |
781 | dbg("sub driver rejected device"); |
782 | kfree(serial); | |
1da177e4 LT |
783 | return retval; |
784 | } | |
785 | } | |
786 | ||
787 | /* descriptor matches, let's find the endpoints needed */ | |
788 | /* check out the endpoints */ | |
789 | iface_desc = interface->cur_altsetting; | |
790 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
791 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
792 | |
793 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
794 | /* we found a bulk in endpoint */ |
795 | dbg("found bulk in on endpoint %d", i); | |
796 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
797 | ++num_bulk_in; | |
798 | } | |
799 | ||
4fa1bbf5 | 800 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
801 | /* we found a bulk out endpoint */ |
802 | dbg("found bulk out on endpoint %d", i); | |
803 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
804 | ++num_bulk_out; | |
805 | } | |
4fa1bbf5 LFC |
806 | |
807 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
808 | /* we found a interrupt in endpoint */ |
809 | dbg("found interrupt in on endpoint %d", i); | |
810 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
811 | ++num_interrupt_in; | |
812 | } | |
813 | ||
4fa1bbf5 | 814 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
815 | /* we found an interrupt out endpoint */ |
816 | dbg("found interrupt out on endpoint %d", i); | |
817 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
818 | ++num_interrupt_out; | |
819 | } | |
820 | } | |
821 | ||
822 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
a8d6f0a9 | 823 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
1da177e4 LT |
824 | /* this is needed due to the looney way its endpoints are set up */ |
825 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
826 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
827 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
828 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
829 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
ce816cf9 AB |
830 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
831 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && | |
832 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { | |
1da177e4 LT |
833 | if (interface != dev->actconfig->interface[0]) { |
834 | /* check out the endpoints of the other interface*/ | |
835 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
836 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
837 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 838 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
839 | /* we found a interrupt in endpoint */ |
840 | dbg("found interrupt in for Prolific device on separate interface"); | |
841 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
842 | ++num_interrupt_in; | |
843 | } | |
844 | } | |
845 | } | |
846 | ||
847 | /* Now make sure the PL-2303 is configured correctly. | |
848 | * If not, give up now and hope this hack will work | |
849 | * properly during a later invocation of usb_serial_probe | |
850 | */ | |
851 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
4b10f0f3 | 852 | unlock_kernel(); |
1da177e4 | 853 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
a8d6f0a9 | 854 | kfree(serial); |
1da177e4 LT |
855 | return -ENODEV; |
856 | } | |
857 | } | |
858 | /* END HORRIBLE HACK FOR PL2303 */ | |
859 | #endif | |
860 | ||
1da177e4 LT |
861 | #ifdef CONFIG_USB_SERIAL_GENERIC |
862 | if (type == &usb_serial_generic_device) { | |
863 | num_ports = num_bulk_out; | |
864 | if (num_ports == 0) { | |
4b10f0f3 | 865 | unlock_kernel(); |
a8d6f0a9 AC |
866 | dev_err(&interface->dev, |
867 | "Generic device with no bulk out, not allowed.\n"); | |
868 | kfree(serial); | |
1da177e4 LT |
869 | return -EIO; |
870 | } | |
871 | } | |
872 | #endif | |
873 | if (!num_ports) { | |
874 | /* if this device type has a calc_num_ports function, call it */ | |
875 | if (type->calc_num_ports) { | |
18fcac35 | 876 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 877 | unlock_kernel(); |
a8d6f0a9 AC |
878 | dev_err(&interface->dev, |
879 | "module get failed, exiting\n"); | |
880 | kfree(serial); | |
1da177e4 LT |
881 | return -EIO; |
882 | } | |
a8d6f0a9 | 883 | num_ports = type->calc_num_ports(serial); |
18fcac35 | 884 | module_put(type->driver.owner); |
1da177e4 LT |
885 | } |
886 | if (!num_ports) | |
887 | num_ports = type->num_ports; | |
888 | } | |
889 | ||
1da177e4 LT |
890 | serial->num_ports = num_ports; |
891 | serial->num_bulk_in = num_bulk_in; | |
892 | serial->num_bulk_out = num_bulk_out; | |
893 | serial->num_interrupt_in = num_interrupt_in; | |
894 | serial->num_interrupt_out = num_interrupt_out; | |
895 | ||
063a2da8 AS |
896 | /* found all that we need */ |
897 | dev_info(&interface->dev, "%s converter detected\n", | |
898 | type->description); | |
899 | ||
1da177e4 | 900 | /* create our ports, we need as many as the max endpoints */ |
a8d6f0a9 AC |
901 | /* we don't use num_ports here because some devices have more |
902 | endpoint pairs than ports */ | |
1da177e4 LT |
903 | max_endpoints = max(num_bulk_in, num_bulk_out); |
904 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
905 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
906 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
907 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
908 | unlock_kernel(); |
909 | ||
a8d6f0a9 AC |
910 | dbg("%s - setting up %d port structures for this device", |
911 | __func__, max_endpoints); | |
1da177e4 | 912 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 913 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
914 | if (!port) |
915 | goto probe_error; | |
4a90f09b | 916 | tty_port_init(&port->port); |
335f8514 | 917 | port->port.ops = &serial_port_ops; |
1da177e4 | 918 | port->serial = serial; |
507ca9bc | 919 | spin_lock_init(&port->lock); |
1ce7dd26 | 920 | mutex_init(&port->mutex); |
c4028958 | 921 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
922 | serial->port[i] = port; |
923 | } | |
924 | ||
925 | /* set up the endpoint information */ | |
926 | for (i = 0; i < num_bulk_in; ++i) { | |
927 | endpoint = bulk_in_endpoint[i]; | |
928 | port = serial->port[i]; | |
a8d6f0a9 | 929 | port->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
1da177e4 LT |
930 | if (!port->read_urb) { |
931 | dev_err(&interface->dev, "No free urbs available\n"); | |
932 | goto probe_error; | |
933 | } | |
934 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
935 | port->bulk_in_size = buffer_size; | |
936 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 937 | port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 938 | if (!port->bulk_in_buffer) { |
a8d6f0a9 AC |
939 | dev_err(&interface->dev, |
940 | "Couldn't allocate bulk_in_buffer\n"); | |
1da177e4 LT |
941 | goto probe_error; |
942 | } | |
a8d6f0a9 AC |
943 | usb_fill_bulk_urb(port->read_urb, dev, |
944 | usb_rcvbulkpipe(dev, | |
945 | endpoint->bEndpointAddress), | |
946 | port->bulk_in_buffer, buffer_size, | |
947 | serial->type->read_bulk_callback, port); | |
1da177e4 LT |
948 | } |
949 | ||
950 | for (i = 0; i < num_bulk_out; ++i) { | |
951 | endpoint = bulk_out_endpoint[i]; | |
952 | port = serial->port[i]; | |
953 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
954 | if (!port->write_urb) { | |
955 | dev_err(&interface->dev, "No free urbs available\n"); | |
956 | goto probe_error; | |
957 | } | |
958 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
959 | port->bulk_out_size = buffer_size; | |
960 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 961 | port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 962 | if (!port->bulk_out_buffer) { |
a8d6f0a9 AC |
963 | dev_err(&interface->dev, |
964 | "Couldn't allocate bulk_out_buffer\n"); | |
1da177e4 LT |
965 | goto probe_error; |
966 | } | |
a8d6f0a9 AC |
967 | usb_fill_bulk_urb(port->write_urb, dev, |
968 | usb_sndbulkpipe(dev, | |
969 | endpoint->bEndpointAddress), | |
970 | port->bulk_out_buffer, buffer_size, | |
971 | serial->type->write_bulk_callback, port); | |
1da177e4 LT |
972 | } |
973 | ||
974 | if (serial->type->read_int_callback) { | |
975 | for (i = 0; i < num_interrupt_in; ++i) { | |
976 | endpoint = interrupt_in_endpoint[i]; | |
977 | port = serial->port[i]; | |
978 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
979 | if (!port->interrupt_in_urb) { | |
a8d6f0a9 AC |
980 | dev_err(&interface->dev, |
981 | "No free urbs available\n"); | |
1da177e4 LT |
982 | goto probe_error; |
983 | } | |
984 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
a8d6f0a9 AC |
985 | port->interrupt_in_endpointAddress = |
986 | endpoint->bEndpointAddress; | |
987 | port->interrupt_in_buffer = kmalloc(buffer_size, | |
988 | GFP_KERNEL); | |
1da177e4 | 989 | if (!port->interrupt_in_buffer) { |
a8d6f0a9 AC |
990 | dev_err(&interface->dev, |
991 | "Couldn't allocate interrupt_in_buffer\n"); | |
1da177e4 LT |
992 | goto probe_error; |
993 | } | |
a8d6f0a9 AC |
994 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
995 | usb_rcvintpipe(dev, | |
996 | endpoint->bEndpointAddress), | |
997 | port->interrupt_in_buffer, buffer_size, | |
998 | serial->type->read_int_callback, port, | |
999 | endpoint->bInterval); | |
1da177e4 LT |
1000 | } |
1001 | } else if (num_interrupt_in) { | |
1002 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
1003 | } | |
a8d6f0a9 | 1004 | |
1da177e4 LT |
1005 | if (serial->type->write_int_callback) { |
1006 | for (i = 0; i < num_interrupt_out; ++i) { | |
1007 | endpoint = interrupt_out_endpoint[i]; | |
1008 | port = serial->port[i]; | |
1009 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1010 | if (!port->interrupt_out_urb) { | |
a8d6f0a9 AC |
1011 | dev_err(&interface->dev, |
1012 | "No free urbs available\n"); | |
1da177e4 LT |
1013 | goto probe_error; |
1014 | } | |
1015 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
1016 | port->interrupt_out_size = buffer_size; | |
a8d6f0a9 AC |
1017 | port->interrupt_out_endpointAddress = |
1018 | endpoint->bEndpointAddress; | |
1019 | port->interrupt_out_buffer = kmalloc(buffer_size, | |
1020 | GFP_KERNEL); | |
1da177e4 | 1021 | if (!port->interrupt_out_buffer) { |
a8d6f0a9 AC |
1022 | dev_err(&interface->dev, |
1023 | "Couldn't allocate interrupt_out_buffer\n"); | |
1da177e4 LT |
1024 | goto probe_error; |
1025 | } | |
a8d6f0a9 AC |
1026 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
1027 | usb_sndintpipe(dev, | |
1028 | endpoint->bEndpointAddress), | |
1029 | port->interrupt_out_buffer, buffer_size, | |
1030 | serial->type->write_int_callback, port, | |
1031 | endpoint->bInterval); | |
1da177e4 LT |
1032 | } |
1033 | } else if (num_interrupt_out) { | |
1034 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
1035 | } | |
a8d6f0a9 | 1036 | |
1da177e4 LT |
1037 | /* if this device type has an attach function, call it */ |
1038 | if (type->attach) { | |
18fcac35 | 1039 | if (!try_module_get(type->driver.owner)) { |
a8d6f0a9 AC |
1040 | dev_err(&interface->dev, |
1041 | "module get failed, exiting\n"); | |
1da177e4 LT |
1042 | goto probe_error; |
1043 | } | |
a8d6f0a9 | 1044 | retval = type->attach(serial); |
18fcac35 | 1045 | module_put(type->driver.owner); |
1da177e4 LT |
1046 | if (retval < 0) |
1047 | goto probe_error; | |
1048 | if (retval > 0) { | |
a8d6f0a9 AC |
1049 | /* quietly accept this device, but don't bind to a |
1050 | serial port as it's about to disappear */ | |
0a3c8549 | 1051 | serial->num_ports = 0; |
1da177e4 LT |
1052 | goto exit; |
1053 | } | |
1054 | } | |
1055 | ||
a8d6f0a9 | 1056 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
34ef50e5 ON |
1057 | dev_err(&interface->dev, "No more free serial devices\n"); |
1058 | goto probe_error; | |
1059 | } | |
c744f99e | 1060 | serial->minor = minor; |
34ef50e5 | 1061 | |
1da177e4 LT |
1062 | /* register all of the individual ports with the driver core */ |
1063 | for (i = 0; i < num_ports; ++i) { | |
1064 | port = serial->port[i]; | |
1065 | port->dev.parent = &interface->dev; | |
1066 | port->dev.driver = NULL; | |
1067 | port->dev.bus = &usb_serial_bus_type; | |
1068 | port->dev.release = &port_release; | |
1069 | ||
0031a06e | 1070 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
7071a3ce | 1071 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
c706ebdf | 1072 | port->dev_state = PORT_REGISTERING; |
13f4db9e | 1073 | retval = device_register(&port->dev); |
c706ebdf | 1074 | if (retval) { |
13f4db9e GKH |
1075 | dev_err(&port->dev, "Error registering port device, " |
1076 | "continuing\n"); | |
c706ebdf AS |
1077 | port->dev_state = PORT_UNREGISTERED; |
1078 | } else { | |
1079 | port->dev_state = PORT_REGISTERED; | |
1080 | } | |
1da177e4 LT |
1081 | } |
1082 | ||
a8d6f0a9 | 1083 | usb_serial_console_init(debug, minor); |
1da177e4 LT |
1084 | |
1085 | exit: | |
1086 | /* success */ | |
a8d6f0a9 | 1087 | usb_set_intfdata(interface, serial); |
1da177e4 LT |
1088 | return 0; |
1089 | ||
1090 | probe_error: | |
1091 | for (i = 0; i < num_bulk_in; ++i) { | |
1092 | port = serial->port[i]; | |
1093 | if (!port) | |
1094 | continue; | |
95d43166 | 1095 | usb_free_urb(port->read_urb); |
1da177e4 LT |
1096 | kfree(port->bulk_in_buffer); |
1097 | } | |
1098 | for (i = 0; i < num_bulk_out; ++i) { | |
1099 | port = serial->port[i]; | |
1100 | if (!port) | |
1101 | continue; | |
95d43166 | 1102 | usb_free_urb(port->write_urb); |
1da177e4 LT |
1103 | kfree(port->bulk_out_buffer); |
1104 | } | |
1105 | for (i = 0; i < num_interrupt_in; ++i) { | |
1106 | port = serial->port[i]; | |
1107 | if (!port) | |
1108 | continue; | |
95d43166 | 1109 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 LT |
1110 | kfree(port->interrupt_in_buffer); |
1111 | } | |
1112 | for (i = 0; i < num_interrupt_out; ++i) { | |
1113 | port = serial->port[i]; | |
1114 | if (!port) | |
1115 | continue; | |
95d43166 | 1116 | usb_free_urb(port->interrupt_out_urb); |
1da177e4 LT |
1117 | kfree(port->interrupt_out_buffer); |
1118 | } | |
1119 | ||
1da177e4 LT |
1120 | /* free up any memory that we allocated */ |
1121 | for (i = 0; i < serial->num_port_pointers; ++i) | |
1122 | kfree(serial->port[i]); | |
a8d6f0a9 | 1123 | kfree(serial); |
1da177e4 LT |
1124 | return -EIO; |
1125 | } | |
a8d6f0a9 | 1126 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
1da177e4 LT |
1127 | |
1128 | void usb_serial_disconnect(struct usb_interface *interface) | |
1129 | { | |
1130 | int i; | |
a8d6f0a9 | 1131 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1132 | struct device *dev = &interface->dev; |
1133 | struct usb_serial_port *port; | |
1134 | ||
73e487fd | 1135 | usb_serial_console_disconnect(serial); |
a8d6f0a9 | 1136 | dbg("%s", __func__); |
1da177e4 | 1137 | |
a1cd7e99 | 1138 | mutex_lock(&serial->disc_mutex); |
a8d6f0a9 | 1139 | usb_set_intfdata(interface, NULL); |
a1cd7e99 ON |
1140 | /* must set a flag, to signal subdrivers */ |
1141 | serial->disconnected = 1; | |
2d93148a AS |
1142 | mutex_unlock(&serial->disc_mutex); |
1143 | ||
a1cd7e99 ON |
1144 | for (i = 0; i < serial->num_ports; ++i) { |
1145 | port = serial->port[i]; | |
1146 | if (port) { | |
4a90f09b AC |
1147 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1148 | if (tty) { | |
d2b39182 | 1149 | tty_vhangup(tty); |
4a90f09b AC |
1150 | tty_kref_put(tty); |
1151 | } | |
a1cd7e99 | 1152 | kill_traffic(port); |
2d93148a | 1153 | cancel_work_sync(&port->work); |
c706ebdf AS |
1154 | if (port->dev_state == PORT_REGISTERED) { |
1155 | ||
1156 | /* Make sure the port is bound so that the | |
1157 | * driver's port_remove method is called. | |
1158 | */ | |
1159 | if (!port->dev.driver) { | |
1160 | int rc; | |
1161 | ||
1162 | port->dev.driver = | |
1163 | &serial->type->driver; | |
1164 | rc = device_bind_driver(&port->dev); | |
1165 | } | |
1166 | port->dev_state = PORT_UNREGISTERING; | |
1167 | device_del(&port->dev); | |
1168 | port->dev_state = PORT_UNREGISTERED; | |
1169 | } | |
2d93148a AS |
1170 | } |
1171 | } | |
f9c99bb8 | 1172 | serial->type->disconnect(serial); |
2d93148a | 1173 | |
a1cd7e99 ON |
1174 | /* let the last holder of this object |
1175 | * cause it to be cleaned up */ | |
a1cd7e99 | 1176 | usb_serial_put(serial); |
1da177e4 LT |
1177 | dev_info(dev, "device disconnected\n"); |
1178 | } | |
a8d6f0a9 | 1179 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
1da177e4 | 1180 | |
ec22559e ON |
1181 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1182 | { | |
1183 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1184 | struct usb_serial_port *port; | |
1185 | int i, r = 0; | |
1186 | ||
f8bece8d ON |
1187 | serial->suspending = 1; |
1188 | ||
e31c1880 ON |
1189 | for (i = 0; i < serial->num_ports; ++i) { |
1190 | port = serial->port[i]; | |
1191 | if (port) | |
1192 | kill_traffic(port); | |
ec22559e ON |
1193 | } |
1194 | ||
1195 | if (serial->type->suspend) | |
e31c1880 | 1196 | r = serial->type->suspend(serial, message); |
ec22559e ON |
1197 | |
1198 | return r; | |
1199 | } | |
1200 | EXPORT_SYMBOL(usb_serial_suspend); | |
1201 | ||
1202 | int usb_serial_resume(struct usb_interface *intf) | |
1203 | { | |
1204 | struct usb_serial *serial = usb_get_intfdata(intf); | |
c49cfa91 | 1205 | int rv; |
ec22559e | 1206 | |
f8bece8d | 1207 | serial->suspending = 0; |
8abaee23 | 1208 | if (serial->type->resume) |
c49cfa91 ON |
1209 | rv = serial->type->resume(serial); |
1210 | else | |
1211 | rv = usb_serial_generic_resume(serial); | |
f8bece8d | 1212 | |
c49cfa91 | 1213 | return rv; |
ec22559e ON |
1214 | } |
1215 | EXPORT_SYMBOL(usb_serial_resume); | |
1216 | ||
b68e31d0 | 1217 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1218 | .open = serial_open, |
1219 | .close = serial_close, | |
1220 | .write = serial_write, | |
335f8514 | 1221 | .hangup = serial_hangup, |
1da177e4 LT |
1222 | .write_room = serial_write_room, |
1223 | .ioctl = serial_ioctl, | |
1224 | .set_termios = serial_set_termios, | |
1225 | .throttle = serial_throttle, | |
1226 | .unthrottle = serial_unthrottle, | |
1227 | .break_ctl = serial_break, | |
1228 | .chars_in_buffer = serial_chars_in_buffer, | |
1da177e4 LT |
1229 | .tiocmget = serial_tiocmget, |
1230 | .tiocmset = serial_tiocmset, | |
4455e344 | 1231 | .shutdown = serial_do_free, |
6fd69d3c | 1232 | .proc_fops = &serial_proc_fops, |
1da177e4 LT |
1233 | }; |
1234 | ||
335f8514 | 1235 | |
1da177e4 LT |
1236 | struct tty_driver *usb_serial_tty_driver; |
1237 | ||
1238 | static int __init usb_serial_init(void) | |
1239 | { | |
1240 | int i; | |
1241 | int result; | |
1242 | ||
1243 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1244 | if (!usb_serial_tty_driver) | |
1245 | return -ENOMEM; | |
1246 | ||
1247 | /* Initialize our global data */ | |
a8d6f0a9 | 1248 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
1da177e4 | 1249 | serial_table[i] = NULL; |
1da177e4 LT |
1250 | |
1251 | result = bus_register(&usb_serial_bus_type); | |
1252 | if (result) { | |
194343d9 GKH |
1253 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
1254 | "failed\n", __func__); | |
1da177e4 LT |
1255 | goto exit_bus; |
1256 | } | |
1257 | ||
1da177e4 LT |
1258 | usb_serial_tty_driver->owner = THIS_MODULE; |
1259 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1260 | usb_serial_tty_driver->name = "ttyUSB"; |
1261 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1262 | usb_serial_tty_driver->minor_start = 0; | |
1263 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1264 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1265 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1266 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1267 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1268 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1269 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1270 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1271 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1272 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1273 | result = tty_register_driver(usb_serial_tty_driver); | |
1274 | if (result) { | |
194343d9 GKH |
1275 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
1276 | __func__); | |
1da177e4 LT |
1277 | goto exit_reg_driver; |
1278 | } | |
1279 | ||
1280 | /* register the USB driver */ | |
1281 | result = usb_register(&usb_serial_driver); | |
1282 | if (result < 0) { | |
194343d9 GKH |
1283 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
1284 | __func__); | |
1da177e4 LT |
1285 | goto exit_tty; |
1286 | } | |
1287 | ||
06299db3 GKH |
1288 | /* register the generic driver, if we should */ |
1289 | result = usb_serial_generic_register(debug); | |
1290 | if (result < 0) { | |
194343d9 GKH |
1291 | printk(KERN_ERR "usb-serial: %s - registering generic " |
1292 | "driver failed\n", __func__); | |
06299db3 GKH |
1293 | goto exit_generic; |
1294 | } | |
1295 | ||
c197a8db | 1296 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1297 | |
1298 | return result; | |
1299 | ||
06299db3 GKH |
1300 | exit_generic: |
1301 | usb_deregister(&usb_serial_driver); | |
1302 | ||
1da177e4 LT |
1303 | exit_tty: |
1304 | tty_unregister_driver(usb_serial_tty_driver); | |
1305 | ||
1306 | exit_reg_driver: | |
1da177e4 LT |
1307 | bus_unregister(&usb_serial_bus_type); |
1308 | ||
1309 | exit_bus: | |
194343d9 GKH |
1310 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
1311 | __func__, result); | |
1da177e4 LT |
1312 | put_tty_driver(usb_serial_tty_driver); |
1313 | return result; | |
1314 | } | |
1315 | ||
1316 | ||
1317 | static void __exit usb_serial_exit(void) | |
1318 | { | |
1319 | usb_serial_console_exit(); | |
1320 | ||
1321 | usb_serial_generic_deregister(); | |
1322 | ||
1323 | usb_deregister(&usb_serial_driver); | |
1324 | tty_unregister_driver(usb_serial_tty_driver); | |
1325 | put_tty_driver(usb_serial_tty_driver); | |
1326 | bus_unregister(&usb_serial_bus_type); | |
1327 | } | |
1328 | ||
1329 | ||
1330 | module_init(usb_serial_init); | |
1331 | module_exit(usb_serial_exit); | |
1332 | ||
1333 | #define set_to_generic_if_null(type, function) \ | |
1334 | do { \ | |
1335 | if (!type->function) { \ | |
1336 | type->function = usb_serial_generic_##function; \ | |
1337 | dbg("Had to override the " #function \ | |
a8d6f0a9 | 1338 | " usb serial operation with the generic one.");\ |
1da177e4 LT |
1339 | } \ |
1340 | } while (0) | |
1341 | ||
ea65370d | 1342 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1343 | { |
1344 | set_to_generic_if_null(device, open); | |
1345 | set_to_generic_if_null(device, write); | |
1346 | set_to_generic_if_null(device, close); | |
1347 | set_to_generic_if_null(device, write_room); | |
1348 | set_to_generic_if_null(device, chars_in_buffer); | |
1349 | set_to_generic_if_null(device, read_bulk_callback); | |
1350 | set_to_generic_if_null(device, write_bulk_callback); | |
f9c99bb8 AS |
1351 | set_to_generic_if_null(device, disconnect); |
1352 | set_to_generic_if_null(device, release); | |
1da177e4 LT |
1353 | } |
1354 | ||
a8d6f0a9 | 1355 | int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 | 1356 | { |
a8d6f0a9 | 1357 | /* must be called with BKL held */ |
1da177e4 LT |
1358 | int retval; |
1359 | ||
e4abe665 DY |
1360 | if (usb_disabled()) |
1361 | return -ENODEV; | |
1362 | ||
ea65370d | 1363 | fixup_generic(driver); |
1da177e4 | 1364 | |
269bda1c GKH |
1365 | if (!driver->description) |
1366 | driver->description = driver->driver.name; | |
1367 | ||
1da177e4 | 1368 | /* Add this device to our list of devices */ |
ea65370d | 1369 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1370 | |
ea65370d | 1371 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1372 | if (retval) { |
194343d9 GKH |
1373 | printk(KERN_ERR "usb-serial: problem %d when registering " |
1374 | "driver %s\n", retval, driver->description); | |
ea65370d | 1375 | list_del(&driver->driver_list); |
a8d6f0a9 | 1376 | } else |
c197a8db | 1377 | printk(KERN_INFO "USB Serial support registered for %s\n", |
a8d6f0a9 | 1378 | driver->description); |
1da177e4 LT |
1379 | |
1380 | return retval; | |
1381 | } | |
a8d6f0a9 | 1382 | EXPORT_SYMBOL_GPL(usb_serial_register); |
1da177e4 LT |
1383 | |
1384 | ||
a8d6f0a9 | 1385 | void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1386 | { |
a8d6f0a9 | 1387 | /* must be called with BKL held */ |
c197a8db GKH |
1388 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
1389 | device->description); | |
1da177e4 LT |
1390 | list_del(&device->driver_list); |
1391 | usb_serial_bus_deregister(device); | |
1392 | } | |
1da177e4 | 1393 | EXPORT_SYMBOL_GPL(usb_serial_deregister); |
1da177e4 LT |
1394 | |
1395 | /* Module information */ | |
a8d6f0a9 AC |
1396 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1397 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1398 | MODULE_LICENSE("GPL"); |
1399 | ||
1400 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1401 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |