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> | |
24 | #include <linux/tty.h> | |
25 | #include <linux/tty_driver.h> | |
26 | #include <linux/tty_flip.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/moduleparam.h> | |
6fd69d3c | 29 | #include <linux/seq_file.h> |
1da177e4 | 30 | #include <linux/spinlock.h> |
1ce7dd26 | 31 | #include <linux/mutex.h> |
1da177e4 | 32 | #include <linux/list.h> |
a8d6f0a9 | 33 | #include <linux/uaccess.h> |
1da177e4 | 34 | #include <linux/usb.h> |
a969888c | 35 | #include <linux/usb/serial.h> |
1da177e4 LT |
36 | #include "pl2303.h" |
37 | ||
38 | /* | |
39 | * Version Information | |
40 | */ | |
1da177e4 LT |
41 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
42 | #define DRIVER_DESC "USB Serial Driver core" | |
43 | ||
34f8e761 PZ |
44 | static void port_free(struct usb_serial_port *port); |
45 | ||
1da177e4 LT |
46 | /* Driver structure we register with the USB core */ |
47 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
48 | .name = "usbserial", |
49 | .probe = usb_serial_probe, | |
50 | .disconnect = usb_serial_disconnect, | |
ec22559e ON |
51 | .suspend = usb_serial_suspend, |
52 | .resume = usb_serial_resume, | |
ba9dc657 | 53 | .no_dynamic_id = 1, |
1da177e4 LT |
54 | }; |
55 | ||
56 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
57 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
58 | cause the "hotplug" program to pull in whatever module is necessary | |
59 | via modprobe, and modprobe will load usbserial because the serial | |
60 | drivers depend on it. | |
61 | */ | |
62 | ||
63 | static int debug; | |
a8d6f0a9 AC |
64 | /* initially all NULL */ |
65 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; | |
3ddad823 | 66 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
67 | static LIST_HEAD(usb_serial_driver_list); |
68 | ||
69 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
70 | { | |
34ef50e5 ON |
71 | struct usb_serial *serial; |
72 | ||
3ddad823 | 73 | mutex_lock(&table_lock); |
34ef50e5 | 74 | serial = serial_table[index]; |
1da177e4 LT |
75 | |
76 | if (serial) | |
77 | kref_get(&serial->kref); | |
3ddad823 | 78 | mutex_unlock(&table_lock); |
1da177e4 LT |
79 | return serial; |
80 | } | |
81 | ||
a8d6f0a9 AC |
82 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
83 | int num_ports, unsigned int *minor) | |
1da177e4 LT |
84 | { |
85 | unsigned int i, j; | |
86 | int good_spot; | |
87 | ||
441b62c1 | 88 | dbg("%s %d", __func__, num_ports); |
1da177e4 LT |
89 | |
90 | *minor = 0; | |
3ddad823 | 91 | mutex_lock(&table_lock); |
1da177e4 LT |
92 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
93 | if (serial_table[i]) | |
94 | continue; | |
95 | ||
96 | good_spot = 1; | |
97 | for (j = 1; j <= num_ports-1; ++j) | |
98 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
99 | good_spot = 0; | |
100 | i += j; | |
101 | break; | |
102 | } | |
103 | if (good_spot == 0) | |
104 | continue; | |
105 | ||
106 | *minor = i; | |
a1f721c8 | 107 | j = 0; |
441b62c1 | 108 | dbg("%s - minor base = %d", __func__, *minor); |
a1f721c8 | 109 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 110 | serial_table[i] = serial; |
a1f721c8 ON |
111 | serial->port[j++]->number = i; |
112 | } | |
3ddad823 | 113 | mutex_unlock(&table_lock); |
1da177e4 LT |
114 | return serial; |
115 | } | |
3ddad823 | 116 | mutex_unlock(&table_lock); |
1da177e4 LT |
117 | return NULL; |
118 | } | |
119 | ||
120 | static void return_serial(struct usb_serial *serial) | |
121 | { | |
122 | int i; | |
123 | ||
441b62c1 | 124 | dbg("%s", __func__); |
1da177e4 | 125 | |
a8d6f0a9 | 126 | for (i = 0; i < serial->num_ports; ++i) |
1da177e4 | 127 | serial_table[serial->minor + i] = NULL; |
1da177e4 LT |
128 | } |
129 | ||
130 | static void destroy_serial(struct kref *kref) | |
131 | { | |
132 | struct usb_serial *serial; | |
133 | struct usb_serial_port *port; | |
134 | int i; | |
135 | ||
136 | serial = to_usb_serial(kref); | |
137 | ||
441b62c1 | 138 | dbg("%s - %s", __func__, serial->type->description); |
1da177e4 | 139 | |
521b85ae | 140 | /* return the minor range that this device had */ |
0282b7f2 AS |
141 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
142 | return_serial(serial); | |
521b85ae | 143 | |
1da177e4 LT |
144 | /* If this is a "fake" port, we have to clean it up here, as it will |
145 | * not get cleaned up in port_release() as it was never registered with | |
146 | * the driver core */ | |
147 | if (serial->num_ports < serial->num_port_pointers) { | |
a8d6f0a9 AC |
148 | for (i = serial->num_ports; |
149 | i < serial->num_port_pointers; ++i) { | |
1da177e4 LT |
150 | port = serial->port[i]; |
151 | if (!port) | |
152 | continue; | |
34f8e761 | 153 | port_free(port); |
1da177e4 LT |
154 | } |
155 | } | |
156 | ||
157 | usb_put_dev(serial->dev); | |
158 | ||
159 | /* free up any memory that we allocated */ | |
a8d6f0a9 | 160 | kfree(serial); |
1da177e4 LT |
161 | } |
162 | ||
73e487fd GL |
163 | void usb_serial_put(struct usb_serial *serial) |
164 | { | |
3ddad823 | 165 | mutex_lock(&table_lock); |
73e487fd | 166 | kref_put(&serial->kref, destroy_serial); |
3ddad823 | 167 | mutex_unlock(&table_lock); |
73e487fd GL |
168 | } |
169 | ||
1da177e4 LT |
170 | /***************************************************************************** |
171 | * Driver tty interface functions | |
172 | *****************************************************************************/ | |
a8d6f0a9 | 173 | static int serial_open (struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
174 | { |
175 | struct usb_serial *serial; | |
176 | struct usb_serial_port *port; | |
177 | unsigned int portNumber; | |
2d93148a | 178 | int retval = 0; |
a8d6f0a9 | 179 | |
441b62c1 | 180 | dbg("%s", __func__); |
1da177e4 LT |
181 | |
182 | /* get the serial object associated with this tty pointer */ | |
183 | serial = usb_serial_get_by_index(tty->index); | |
184 | if (!serial) { | |
185 | tty->driver_data = NULL; | |
186 | return -ENODEV; | |
187 | } | |
188 | ||
2d93148a | 189 | mutex_lock(&serial->disc_mutex); |
1da177e4 LT |
190 | portNumber = tty->index - serial->minor; |
191 | port = serial->port[portNumber]; | |
2d93148a | 192 | if (!port || serial->disconnected) |
331879fd | 193 | retval = -ENODEV; |
2d93148a AS |
194 | else |
195 | get_device(&port->dev); | |
196 | /* | |
197 | * Note: Our locking order requirement does not allow port->mutex | |
198 | * to be acquired while serial->disc_mutex is held. | |
199 | */ | |
200 | mutex_unlock(&serial->disc_mutex); | |
201 | if (retval) | |
202 | goto bailout_serial_put; | |
331879fd | 203 | |
71a84163 LFC |
204 | if (mutex_lock_interruptible(&port->mutex)) { |
205 | retval = -ERESTARTSYS; | |
2d93148a | 206 | goto bailout_port_put; |
71a84163 | 207 | } |
a8d6f0a9 | 208 | |
95da310e | 209 | ++port->port.count; |
1da177e4 | 210 | |
ca85485c PF |
211 | /* set up our port structure making the tty driver |
212 | * remember our port object, and us it */ | |
213 | tty->driver_data = port; | |
4a90f09b | 214 | tty_port_tty_set(&port->port, tty); |
1da177e4 | 215 | |
95da310e | 216 | if (port->port.count == 1) { |
1da177e4 LT |
217 | |
218 | /* lock this module before we call it | |
219 | * this may fail, which means we must bail out, | |
220 | * safe because we are called with BKL held */ | |
18fcac35 | 221 | if (!try_module_get(serial->type->driver.owner)) { |
1da177e4 | 222 | retval = -ENODEV; |
71a84163 | 223 | goto bailout_mutex_unlock; |
1da177e4 LT |
224 | } |
225 | ||
2d93148a AS |
226 | mutex_lock(&serial->disc_mutex); |
227 | if (serial->disconnected) | |
228 | retval = -ENODEV; | |
229 | else | |
230 | retval = usb_autopm_get_interface(serial->interface); | |
f0fbd5b9 SS |
231 | if (retval) |
232 | goto bailout_module_put; | |
2d93148a | 233 | |
a8d6f0a9 | 234 | /* only call the device specific open if this |
1da177e4 | 235 | * is the first time the port is opened */ |
95da310e | 236 | retval = serial->type->open(tty, port, filp); |
1da177e4 | 237 | if (retval) |
f0fbd5b9 | 238 | goto bailout_interface_put; |
2d93148a | 239 | mutex_unlock(&serial->disc_mutex); |
1da177e4 | 240 | } |
1ce7dd26 | 241 | mutex_unlock(&port->mutex); |
335f8514 AC |
242 | /* Now do the correct tty layer semantics */ |
243 | retval = tty_port_block_til_ready(&port->port, tty, filp); | |
244 | if (retval == 0) | |
245 | return 0; | |
1da177e4 | 246 | |
f0fbd5b9 SS |
247 | bailout_interface_put: |
248 | usb_autopm_put_interface(serial->interface); | |
1da177e4 | 249 | bailout_module_put: |
2d93148a | 250 | mutex_unlock(&serial->disc_mutex); |
18fcac35 | 251 | module_put(serial->type->driver.owner); |
71a84163 | 252 | bailout_mutex_unlock: |
95da310e | 253 | port->port.count = 0; |
b059c81a | 254 | tty->driver_data = NULL; |
4a90f09b | 255 | tty_port_tty_set(&port->port, NULL); |
1ce7dd26 | 256 | mutex_unlock(&port->mutex); |
2d93148a AS |
257 | bailout_port_put: |
258 | put_device(&port->dev); | |
259 | bailout_serial_put: | |
73e487fd | 260 | usb_serial_put(serial); |
1da177e4 LT |
261 | return retval; |
262 | } | |
263 | ||
335f8514 AC |
264 | /** |
265 | * serial_do_down - shut down hardware | |
266 | * @port: port to shut down | |
267 | * | |
268 | * Shut down a USB port unless it is the console. We never shut down the | |
269 | * console hardware as it will always be in use. | |
270 | * | |
271 | * Don't free any resources at this point | |
272 | */ | |
273 | static void serial_do_down(struct usb_serial_port *port) | |
1da177e4 | 274 | { |
335f8514 | 275 | struct usb_serial_driver *drv = port->serial->type; |
2d93148a AS |
276 | struct usb_serial *serial; |
277 | struct module *owner; | |
1da177e4 | 278 | |
335f8514 AC |
279 | /* The console is magical, do not hang up the console hardware |
280 | or there will be tears */ | |
281 | if (port->console) | |
1da177e4 LT |
282 | return; |
283 | ||
1ce7dd26 | 284 | mutex_lock(&port->mutex); |
2d93148a AS |
285 | serial = port->serial; |
286 | owner = serial->type->driver.owner; | |
8a4613f0 | 287 | |
335f8514 AC |
288 | if (drv->close) |
289 | drv->close(port); | |
1da177e4 | 290 | |
1ce7dd26 | 291 | mutex_unlock(&port->mutex); |
335f8514 AC |
292 | } |
293 | ||
294 | /** | |
295 | * serial_do_free - free resources post close/hangup | |
296 | * @port: port to free up | |
297 | * | |
298 | * Do the resource freeing and refcount dropping for the port. We must | |
299 | * be careful about ordering and we must avoid freeing up the console. | |
300 | */ | |
2d93148a | 301 | |
335f8514 AC |
302 | static void serial_do_free(struct usb_serial_port *port) |
303 | { | |
304 | struct usb_serial *serial; | |
305 | struct module *owner; | |
306 | ||
307 | /* The console is magical, do not hang up the console hardware | |
308 | or there will be tears */ | |
309 | if (port->console) | |
310 | return; | |
311 | ||
312 | serial = port->serial; | |
313 | owner = serial->type->driver.owner; | |
314 | put_device(&port->dev); | |
2d93148a | 315 | /* Mustn't dereference port any more */ |
335f8514 AC |
316 | mutex_lock(&serial->disc_mutex); |
317 | if (!serial->disconnected) | |
318 | usb_autopm_put_interface(serial->interface); | |
319 | mutex_unlock(&serial->disc_mutex); | |
2d93148a | 320 | usb_serial_put(serial); |
2d93148a | 321 | /* Mustn't dereference serial any more */ |
335f8514 AC |
322 | module_put(owner); |
323 | } | |
324 | ||
325 | static void serial_close(struct tty_struct *tty, struct file *filp) | |
326 | { | |
327 | struct usb_serial_port *port = tty->driver_data; | |
328 | ||
329 | dbg("%s - port %d", __func__, port->number); | |
330 | ||
331 | ||
332 | if (tty_port_close_start(&port->port, tty, filp) == 0) | |
333 | return; | |
334 | ||
335 | serial_do_down(port); | |
336 | tty_port_close_end(&port->port, tty); | |
337 | tty_port_tty_set(&port->port, NULL); | |
338 | serial_do_free(port); | |
339 | } | |
340 | ||
341 | static void serial_hangup(struct tty_struct *tty) | |
342 | { | |
343 | struct usb_serial_port *port = tty->driver_data; | |
344 | serial_do_down(port); | |
345 | tty_port_hangup(&port->port); | |
346 | serial_do_free(port); | |
1da177e4 LT |
347 | } |
348 | ||
a8d6f0a9 AC |
349 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
350 | int count) | |
1da177e4 | 351 | { |
81671ddb | 352 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 353 | int retval = -ENODEV; |
1da177e4 | 354 | |
f34d7a5b | 355 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
356 | goto exit; |
357 | ||
441b62c1 | 358 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
1da177e4 | 359 | |
95da310e | 360 | /* count is managed under the mutex lock for the tty so cannot |
a8d6f0a9 | 361 | drop to zero until after the last close completes */ |
95da310e | 362 | WARN_ON(!port->port.count); |
1da177e4 LT |
363 | |
364 | /* pass on to the driver specific version of this function */ | |
95da310e | 365 | retval = port->serial->type->write(tty, port, buf, count); |
1da177e4 LT |
366 | |
367 | exit: | |
368 | return retval; | |
369 | } | |
370 | ||
a8d6f0a9 | 371 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 372 | { |
81671ddb | 373 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 374 | dbg("%s - port %d", __func__, port->number); |
95da310e | 375 | WARN_ON(!port->port.count); |
1da177e4 | 376 | /* pass on to the driver specific version of this function */ |
95da310e | 377 | return port->serial->type->write_room(tty); |
1da177e4 LT |
378 | } |
379 | ||
a8d6f0a9 | 380 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 381 | { |
81671ddb | 382 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 383 | dbg("%s = port %d", __func__, port->number); |
1da177e4 | 384 | |
95da310e | 385 | WARN_ON(!port->port.count); |
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); |
1da177e4 | 492 | } |
6fd69d3c | 493 | return 0; |
1da177e4 LT |
494 | } |
495 | ||
6fd69d3c AD |
496 | static int serial_proc_open(struct inode *inode, struct file *file) |
497 | { | |
498 | return single_open(file, serial_proc_show, NULL); | |
499 | } | |
500 | ||
501 | static const struct file_operations serial_proc_fops = { | |
502 | .owner = THIS_MODULE, | |
503 | .open = serial_proc_open, | |
504 | .read = seq_read, | |
505 | .llseek = seq_lseek, | |
506 | .release = single_release, | |
507 | }; | |
508 | ||
a8d6f0a9 | 509 | static int serial_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 510 | { |
81671ddb | 511 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 512 | |
441b62c1 | 513 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 514 | |
95da310e | 515 | WARN_ON(!port->port.count); |
1da177e4 | 516 | if (port->serial->type->tiocmget) |
95da310e | 517 | return port->serial->type->tiocmget(tty, file); |
1da177e4 LT |
518 | return -EINVAL; |
519 | } | |
520 | ||
a8d6f0a9 | 521 | static int serial_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
522 | unsigned int set, unsigned int clear) |
523 | { | |
81671ddb | 524 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 525 | |
441b62c1 | 526 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 527 | |
95da310e | 528 | WARN_ON(!port->port.count); |
1da177e4 | 529 | if (port->serial->type->tiocmset) |
95da310e | 530 | return port->serial->type->tiocmset(tty, file, set, clear); |
1da177e4 LT |
531 | return -EINVAL; |
532 | } | |
533 | ||
cf2c7481 PZ |
534 | /* |
535 | * We would be calling tty_wakeup here, but unfortunately some line | |
536 | * disciplines have an annoying habit of calling tty->write from | |
537 | * the write wakeup callback (e.g. n_hdlc.c). | |
538 | */ | |
539 | void usb_serial_port_softint(struct usb_serial_port *port) | |
540 | { | |
541 | schedule_work(&port->work); | |
542 | } | |
a8d6f0a9 | 543 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
cf2c7481 | 544 | |
c4028958 | 545 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 546 | { |
c4028958 DH |
547 | struct usb_serial_port *port = |
548 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
549 | struct tty_struct *tty; |
550 | ||
441b62c1 | 551 | dbg("%s - port %d", __func__, port->number); |
a8d6f0a9 | 552 | |
4a90f09b | 553 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
554 | if (!tty) |
555 | return; | |
556 | ||
557 | tty_wakeup(tty); | |
4a90f09b | 558 | tty_kref_put(tty); |
1da177e4 LT |
559 | } |
560 | ||
561 | static void port_release(struct device *dev) | |
562 | { | |
563 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
564 | ||
7071a3ce | 565 | dbg ("%s - %s", __func__, dev_name(dev)); |
34f8e761 PZ |
566 | port_free(port); |
567 | } | |
568 | ||
34ef50e5 | 569 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 570 | { |
1da177e4 | 571 | usb_kill_urb(port->read_urb); |
1da177e4 | 572 | usb_kill_urb(port->write_urb); |
5adceac5 ON |
573 | /* |
574 | * This is tricky. | |
575 | * Some drivers submit the read_urb in the | |
576 | * handler for the write_urb or vice versa | |
577 | * this order determines the order in which | |
578 | * usb_kill_urb() must be used to reliably | |
579 | * kill the URBs. As it is unknown here, | |
580 | * both orders must be used in turn. | |
581 | * The call below is not redundant. | |
582 | */ | |
583 | usb_kill_urb(port->read_urb); | |
1da177e4 | 584 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 585 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
586 | } |
587 | ||
588 | static void port_free(struct usb_serial_port *port) | |
589 | { | |
2d93148a AS |
590 | /* |
591 | * Stop all the traffic before cancelling the work, so that | |
592 | * nobody will restart it by calling usb_serial_port_softint. | |
593 | */ | |
34ef50e5 | 594 | kill_traffic(port); |
2d93148a AS |
595 | cancel_work_sync(&port->work); |
596 | ||
34ef50e5 ON |
597 | usb_free_urb(port->read_urb); |
598 | usb_free_urb(port->write_urb); | |
599 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 LT |
600 | usb_free_urb(port->interrupt_out_urb); |
601 | kfree(port->bulk_in_buffer); | |
602 | kfree(port->bulk_out_buffer); | |
603 | kfree(port->interrupt_in_buffer); | |
604 | kfree(port->interrupt_out_buffer); | |
605 | kfree(port); | |
606 | } | |
607 | ||
a8d6f0a9 AC |
608 | static struct usb_serial *create_serial(struct usb_device *dev, |
609 | struct usb_interface *interface, | |
610 | struct usb_serial_driver *driver) | |
1da177e4 LT |
611 | { |
612 | struct usb_serial *serial; | |
613 | ||
80b6ca48 | 614 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 615 | if (!serial) { |
441b62c1 | 616 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
617 | return NULL; |
618 | } | |
1da177e4 | 619 | serial->dev = usb_get_dev(dev); |
ea65370d | 620 | serial->type = driver; |
1da177e4 LT |
621 | serial->interface = interface; |
622 | kref_init(&serial->kref); | |
a1cd7e99 | 623 | mutex_init(&serial->disc_mutex); |
0282b7f2 | 624 | serial->minor = SERIAL_TTY_NO_MINOR; |
1da177e4 LT |
625 | |
626 | return serial; | |
627 | } | |
628 | ||
93bacefc | 629 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 630 | struct usb_serial_driver *drv) |
93bacefc GKH |
631 | { |
632 | struct usb_dynid *dynid; | |
633 | ||
634 | spin_lock(&drv->dynids.lock); | |
635 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
636 | if (usb_match_one_id(intf, &dynid->id)) { | |
637 | spin_unlock(&drv->dynids.lock); | |
638 | return &dynid->id; | |
639 | } | |
640 | } | |
641 | spin_unlock(&drv->dynids.lock); | |
642 | return NULL; | |
643 | } | |
644 | ||
645 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
646 | struct usb_interface *intf) | |
647 | { | |
648 | const struct usb_device_id *id; | |
649 | ||
650 | id = usb_match_id(intf, drv->id_table); | |
651 | if (id) { | |
652 | dbg("static descriptor matches"); | |
653 | goto exit; | |
654 | } | |
655 | id = match_dynamic_id(intf, drv); | |
656 | if (id) | |
657 | dbg("dynamic descriptor matches"); | |
658 | exit: | |
659 | return id; | |
660 | } | |
661 | ||
a8d6f0a9 AC |
662 | static struct usb_serial_driver *search_serial_device( |
663 | struct usb_interface *iface) | |
1da177e4 | 664 | { |
1da177e4 | 665 | const struct usb_device_id *id; |
063a2da8 | 666 | struct usb_serial_driver *drv; |
1da177e4 | 667 | |
93b1fae4 | 668 | /* Check if the usb id matches a known device */ |
063a2da8 AS |
669 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
670 | id = get_iface_id(drv, iface); | |
93bacefc | 671 | if (id) |
063a2da8 | 672 | return drv; |
1da177e4 LT |
673 | } |
674 | ||
675 | return NULL; | |
676 | } | |
677 | ||
335f8514 AC |
678 | static int serial_carrier_raised(struct tty_port *port) |
679 | { | |
680 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
681 | struct usb_serial_driver *drv = p->serial->type; | |
682 | if (drv->carrier_raised) | |
683 | return drv->carrier_raised(p); | |
684 | /* No carrier control - don't block */ | |
685 | return 1; | |
686 | } | |
687 | ||
688 | static void serial_dtr_rts(struct tty_port *port, int on) | |
689 | { | |
690 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
691 | struct usb_serial_driver *drv = p->serial->type; | |
692 | if (drv->dtr_rts) | |
693 | drv->dtr_rts(p, on); | |
694 | } | |
695 | ||
696 | static const struct tty_port_operations serial_port_ops = { | |
697 | .carrier_raised = serial_carrier_raised, | |
698 | .dtr_rts = serial_dtr_rts, | |
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); |
1ce7dd26 | 897 | mutex_init(&port->mutex); |
c4028958 | 898 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
899 | serial->port[i] = port; |
900 | } | |
901 | ||
902 | /* set up the endpoint information */ | |
903 | for (i = 0; i < num_bulk_in; ++i) { | |
904 | endpoint = bulk_in_endpoint[i]; | |
905 | port = serial->port[i]; | |
a8d6f0a9 | 906 | port->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
1da177e4 LT |
907 | if (!port->read_urb) { |
908 | dev_err(&interface->dev, "No free urbs available\n"); | |
909 | goto probe_error; | |
910 | } | |
911 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
912 | port->bulk_in_size = buffer_size; | |
913 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 914 | port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 915 | if (!port->bulk_in_buffer) { |
a8d6f0a9 AC |
916 | dev_err(&interface->dev, |
917 | "Couldn't allocate bulk_in_buffer\n"); | |
1da177e4 LT |
918 | goto probe_error; |
919 | } | |
a8d6f0a9 AC |
920 | usb_fill_bulk_urb(port->read_urb, dev, |
921 | usb_rcvbulkpipe(dev, | |
922 | endpoint->bEndpointAddress), | |
923 | port->bulk_in_buffer, buffer_size, | |
924 | serial->type->read_bulk_callback, port); | |
1da177e4 LT |
925 | } |
926 | ||
927 | for (i = 0; i < num_bulk_out; ++i) { | |
928 | endpoint = bulk_out_endpoint[i]; | |
929 | port = serial->port[i]; | |
930 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
931 | if (!port->write_urb) { | |
932 | dev_err(&interface->dev, "No free urbs available\n"); | |
933 | goto probe_error; | |
934 | } | |
935 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
936 | port->bulk_out_size = buffer_size; | |
937 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 938 | port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 939 | if (!port->bulk_out_buffer) { |
a8d6f0a9 AC |
940 | dev_err(&interface->dev, |
941 | "Couldn't allocate bulk_out_buffer\n"); | |
1da177e4 LT |
942 | goto probe_error; |
943 | } | |
a8d6f0a9 AC |
944 | usb_fill_bulk_urb(port->write_urb, dev, |
945 | usb_sndbulkpipe(dev, | |
946 | endpoint->bEndpointAddress), | |
947 | port->bulk_out_buffer, buffer_size, | |
948 | serial->type->write_bulk_callback, port); | |
1da177e4 LT |
949 | } |
950 | ||
951 | if (serial->type->read_int_callback) { | |
952 | for (i = 0; i < num_interrupt_in; ++i) { | |
953 | endpoint = interrupt_in_endpoint[i]; | |
954 | port = serial->port[i]; | |
955 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
956 | if (!port->interrupt_in_urb) { | |
a8d6f0a9 AC |
957 | dev_err(&interface->dev, |
958 | "No free urbs available\n"); | |
1da177e4 LT |
959 | goto probe_error; |
960 | } | |
961 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
a8d6f0a9 AC |
962 | port->interrupt_in_endpointAddress = |
963 | endpoint->bEndpointAddress; | |
964 | port->interrupt_in_buffer = kmalloc(buffer_size, | |
965 | GFP_KERNEL); | |
1da177e4 | 966 | if (!port->interrupt_in_buffer) { |
a8d6f0a9 AC |
967 | dev_err(&interface->dev, |
968 | "Couldn't allocate interrupt_in_buffer\n"); | |
1da177e4 LT |
969 | goto probe_error; |
970 | } | |
a8d6f0a9 AC |
971 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
972 | usb_rcvintpipe(dev, | |
973 | endpoint->bEndpointAddress), | |
974 | port->interrupt_in_buffer, buffer_size, | |
975 | serial->type->read_int_callback, port, | |
976 | endpoint->bInterval); | |
1da177e4 LT |
977 | } |
978 | } else if (num_interrupt_in) { | |
979 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
980 | } | |
a8d6f0a9 | 981 | |
1da177e4 LT |
982 | if (serial->type->write_int_callback) { |
983 | for (i = 0; i < num_interrupt_out; ++i) { | |
984 | endpoint = interrupt_out_endpoint[i]; | |
985 | port = serial->port[i]; | |
986 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
987 | if (!port->interrupt_out_urb) { | |
a8d6f0a9 AC |
988 | dev_err(&interface->dev, |
989 | "No free urbs available\n"); | |
1da177e4 LT |
990 | goto probe_error; |
991 | } | |
992 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
993 | port->interrupt_out_size = buffer_size; | |
a8d6f0a9 AC |
994 | port->interrupt_out_endpointAddress = |
995 | endpoint->bEndpointAddress; | |
996 | port->interrupt_out_buffer = kmalloc(buffer_size, | |
997 | GFP_KERNEL); | |
1da177e4 | 998 | if (!port->interrupt_out_buffer) { |
a8d6f0a9 AC |
999 | dev_err(&interface->dev, |
1000 | "Couldn't allocate interrupt_out_buffer\n"); | |
1da177e4 LT |
1001 | goto probe_error; |
1002 | } | |
a8d6f0a9 AC |
1003 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
1004 | usb_sndintpipe(dev, | |
1005 | endpoint->bEndpointAddress), | |
1006 | port->interrupt_out_buffer, buffer_size, | |
1007 | serial->type->write_int_callback, port, | |
1008 | endpoint->bInterval); | |
1da177e4 LT |
1009 | } |
1010 | } else if (num_interrupt_out) { | |
1011 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
1012 | } | |
a8d6f0a9 | 1013 | |
1da177e4 LT |
1014 | /* if this device type has an attach function, call it */ |
1015 | if (type->attach) { | |
18fcac35 | 1016 | if (!try_module_get(type->driver.owner)) { |
a8d6f0a9 AC |
1017 | dev_err(&interface->dev, |
1018 | "module get failed, exiting\n"); | |
1da177e4 LT |
1019 | goto probe_error; |
1020 | } | |
a8d6f0a9 | 1021 | retval = type->attach(serial); |
18fcac35 | 1022 | module_put(type->driver.owner); |
1da177e4 LT |
1023 | if (retval < 0) |
1024 | goto probe_error; | |
1025 | if (retval > 0) { | |
a8d6f0a9 AC |
1026 | /* quietly accept this device, but don't bind to a |
1027 | serial port as it's about to disappear */ | |
0a3c8549 | 1028 | serial->num_ports = 0; |
1da177e4 LT |
1029 | goto exit; |
1030 | } | |
1031 | } | |
1032 | ||
a8d6f0a9 | 1033 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
34ef50e5 ON |
1034 | dev_err(&interface->dev, "No more free serial devices\n"); |
1035 | goto probe_error; | |
1036 | } | |
c744f99e | 1037 | serial->minor = minor; |
34ef50e5 | 1038 | |
1da177e4 LT |
1039 | /* register all of the individual ports with the driver core */ |
1040 | for (i = 0; i < num_ports; ++i) { | |
1041 | port = serial->port[i]; | |
1042 | port->dev.parent = &interface->dev; | |
1043 | port->dev.driver = NULL; | |
1044 | port->dev.bus = &usb_serial_bus_type; | |
1045 | port->dev.release = &port_release; | |
1046 | ||
0031a06e | 1047 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
7071a3ce | 1048 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
c706ebdf | 1049 | port->dev_state = PORT_REGISTERING; |
13f4db9e | 1050 | retval = device_register(&port->dev); |
c706ebdf | 1051 | if (retval) { |
13f4db9e GKH |
1052 | dev_err(&port->dev, "Error registering port device, " |
1053 | "continuing\n"); | |
c706ebdf AS |
1054 | port->dev_state = PORT_UNREGISTERED; |
1055 | } else { | |
1056 | port->dev_state = PORT_REGISTERED; | |
1057 | } | |
1da177e4 LT |
1058 | } |
1059 | ||
a8d6f0a9 | 1060 | usb_serial_console_init(debug, minor); |
1da177e4 LT |
1061 | |
1062 | exit: | |
1063 | /* success */ | |
a8d6f0a9 | 1064 | usb_set_intfdata(interface, serial); |
1da177e4 LT |
1065 | return 0; |
1066 | ||
1067 | probe_error: | |
1068 | for (i = 0; i < num_bulk_in; ++i) { | |
1069 | port = serial->port[i]; | |
1070 | if (!port) | |
1071 | continue; | |
95d43166 | 1072 | usb_free_urb(port->read_urb); |
1da177e4 LT |
1073 | kfree(port->bulk_in_buffer); |
1074 | } | |
1075 | for (i = 0; i < num_bulk_out; ++i) { | |
1076 | port = serial->port[i]; | |
1077 | if (!port) | |
1078 | continue; | |
95d43166 | 1079 | usb_free_urb(port->write_urb); |
1da177e4 LT |
1080 | kfree(port->bulk_out_buffer); |
1081 | } | |
1082 | for (i = 0; i < num_interrupt_in; ++i) { | |
1083 | port = serial->port[i]; | |
1084 | if (!port) | |
1085 | continue; | |
95d43166 | 1086 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 LT |
1087 | kfree(port->interrupt_in_buffer); |
1088 | } | |
1089 | for (i = 0; i < num_interrupt_out; ++i) { | |
1090 | port = serial->port[i]; | |
1091 | if (!port) | |
1092 | continue; | |
95d43166 | 1093 | usb_free_urb(port->interrupt_out_urb); |
1da177e4 LT |
1094 | kfree(port->interrupt_out_buffer); |
1095 | } | |
1096 | ||
1da177e4 LT |
1097 | /* free up any memory that we allocated */ |
1098 | for (i = 0; i < serial->num_port_pointers; ++i) | |
1099 | kfree(serial->port[i]); | |
a8d6f0a9 | 1100 | kfree(serial); |
1da177e4 LT |
1101 | return -EIO; |
1102 | } | |
a8d6f0a9 | 1103 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
1da177e4 LT |
1104 | |
1105 | void usb_serial_disconnect(struct usb_interface *interface) | |
1106 | { | |
1107 | int i; | |
a8d6f0a9 | 1108 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1109 | struct device *dev = &interface->dev; |
1110 | struct usb_serial_port *port; | |
1111 | ||
73e487fd | 1112 | usb_serial_console_disconnect(serial); |
a8d6f0a9 | 1113 | dbg("%s", __func__); |
1da177e4 | 1114 | |
a1cd7e99 | 1115 | mutex_lock(&serial->disc_mutex); |
a8d6f0a9 | 1116 | usb_set_intfdata(interface, NULL); |
a1cd7e99 ON |
1117 | /* must set a flag, to signal subdrivers */ |
1118 | serial->disconnected = 1; | |
2d93148a AS |
1119 | mutex_unlock(&serial->disc_mutex); |
1120 | ||
1121 | /* Unfortunately, many of the sub-drivers expect the port structures | |
1122 | * to exist when their shutdown method is called, so we have to go | |
1123 | * through this awkward two-step unregistration procedure. | |
1124 | */ | |
a1cd7e99 ON |
1125 | for (i = 0; i < serial->num_ports; ++i) { |
1126 | port = serial->port[i]; | |
1127 | if (port) { | |
4a90f09b AC |
1128 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1129 | if (tty) { | |
335f8514 AC |
1130 | /* The hangup will occur asynchronously but |
1131 | the object refcounts will sort out all the | |
1132 | cleanup */ | |
4a90f09b AC |
1133 | tty_hangup(tty); |
1134 | tty_kref_put(tty); | |
1135 | } | |
a1cd7e99 | 1136 | kill_traffic(port); |
2d93148a | 1137 | cancel_work_sync(&port->work); |
c706ebdf AS |
1138 | if (port->dev_state == PORT_REGISTERED) { |
1139 | ||
1140 | /* Make sure the port is bound so that the | |
1141 | * driver's port_remove method is called. | |
1142 | */ | |
1143 | if (!port->dev.driver) { | |
1144 | int rc; | |
1145 | ||
1146 | port->dev.driver = | |
1147 | &serial->type->driver; | |
1148 | rc = device_bind_driver(&port->dev); | |
1149 | } | |
1150 | port->dev_state = PORT_UNREGISTERING; | |
1151 | device_del(&port->dev); | |
1152 | port->dev_state = PORT_UNREGISTERED; | |
1153 | } | |
2d93148a AS |
1154 | } |
1155 | } | |
1156 | serial->type->shutdown(serial); | |
1157 | for (i = 0; i < serial->num_ports; ++i) { | |
1158 | port = serial->port[i]; | |
1159 | if (port) { | |
1160 | put_device(&port->dev); | |
1161 | serial->port[i] = NULL; | |
1da177e4 | 1162 | } |
1da177e4 | 1163 | } |
2d93148a | 1164 | |
a1cd7e99 ON |
1165 | /* let the last holder of this object |
1166 | * cause it to be cleaned up */ | |
a1cd7e99 | 1167 | usb_serial_put(serial); |
1da177e4 LT |
1168 | dev_info(dev, "device disconnected\n"); |
1169 | } | |
a8d6f0a9 | 1170 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
1da177e4 | 1171 | |
ec22559e ON |
1172 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1173 | { | |
1174 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1175 | struct usb_serial_port *port; | |
1176 | int i, r = 0; | |
1177 | ||
f8bece8d ON |
1178 | serial->suspending = 1; |
1179 | ||
e31c1880 ON |
1180 | for (i = 0; i < serial->num_ports; ++i) { |
1181 | port = serial->port[i]; | |
1182 | if (port) | |
1183 | kill_traffic(port); | |
ec22559e ON |
1184 | } |
1185 | ||
1186 | if (serial->type->suspend) | |
e31c1880 | 1187 | r = serial->type->suspend(serial, message); |
ec22559e ON |
1188 | |
1189 | return r; | |
1190 | } | |
1191 | EXPORT_SYMBOL(usb_serial_suspend); | |
1192 | ||
1193 | int usb_serial_resume(struct usb_interface *intf) | |
1194 | { | |
1195 | struct usb_serial *serial = usb_get_intfdata(intf); | |
c49cfa91 | 1196 | int rv; |
ec22559e | 1197 | |
f8bece8d | 1198 | serial->suspending = 0; |
8abaee23 | 1199 | if (serial->type->resume) |
c49cfa91 ON |
1200 | rv = serial->type->resume(serial); |
1201 | else | |
1202 | rv = usb_serial_generic_resume(serial); | |
f8bece8d | 1203 | |
c49cfa91 | 1204 | return rv; |
ec22559e ON |
1205 | } |
1206 | EXPORT_SYMBOL(usb_serial_resume); | |
1207 | ||
b68e31d0 | 1208 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1209 | .open = serial_open, |
1210 | .close = serial_close, | |
1211 | .write = serial_write, | |
335f8514 | 1212 | .hangup = serial_hangup, |
1da177e4 LT |
1213 | .write_room = serial_write_room, |
1214 | .ioctl = serial_ioctl, | |
1215 | .set_termios = serial_set_termios, | |
1216 | .throttle = serial_throttle, | |
1217 | .unthrottle = serial_unthrottle, | |
1218 | .break_ctl = serial_break, | |
1219 | .chars_in_buffer = serial_chars_in_buffer, | |
1da177e4 LT |
1220 | .tiocmget = serial_tiocmget, |
1221 | .tiocmset = serial_tiocmset, | |
6fd69d3c | 1222 | .proc_fops = &serial_proc_fops, |
1da177e4 LT |
1223 | }; |
1224 | ||
335f8514 | 1225 | |
1da177e4 LT |
1226 | struct tty_driver *usb_serial_tty_driver; |
1227 | ||
1228 | static int __init usb_serial_init(void) | |
1229 | { | |
1230 | int i; | |
1231 | int result; | |
1232 | ||
1233 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1234 | if (!usb_serial_tty_driver) | |
1235 | return -ENOMEM; | |
1236 | ||
1237 | /* Initialize our global data */ | |
a8d6f0a9 | 1238 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
1da177e4 | 1239 | serial_table[i] = NULL; |
1da177e4 LT |
1240 | |
1241 | result = bus_register(&usb_serial_bus_type); | |
1242 | if (result) { | |
194343d9 GKH |
1243 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
1244 | "failed\n", __func__); | |
1da177e4 LT |
1245 | goto exit_bus; |
1246 | } | |
1247 | ||
1da177e4 LT |
1248 | usb_serial_tty_driver->owner = THIS_MODULE; |
1249 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1250 | usb_serial_tty_driver->name = "ttyUSB"; |
1251 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1252 | usb_serial_tty_driver->minor_start = 0; | |
1253 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1254 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1255 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1256 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1257 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1258 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1259 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1260 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1261 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1262 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1263 | result = tty_register_driver(usb_serial_tty_driver); | |
1264 | if (result) { | |
194343d9 GKH |
1265 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
1266 | __func__); | |
1da177e4 LT |
1267 | goto exit_reg_driver; |
1268 | } | |
1269 | ||
1270 | /* register the USB driver */ | |
1271 | result = usb_register(&usb_serial_driver); | |
1272 | if (result < 0) { | |
194343d9 GKH |
1273 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
1274 | __func__); | |
1da177e4 LT |
1275 | goto exit_tty; |
1276 | } | |
1277 | ||
06299db3 GKH |
1278 | /* register the generic driver, if we should */ |
1279 | result = usb_serial_generic_register(debug); | |
1280 | if (result < 0) { | |
194343d9 GKH |
1281 | printk(KERN_ERR "usb-serial: %s - registering generic " |
1282 | "driver failed\n", __func__); | |
06299db3 GKH |
1283 | goto exit_generic; |
1284 | } | |
1285 | ||
c197a8db | 1286 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1287 | |
1288 | return result; | |
1289 | ||
06299db3 GKH |
1290 | exit_generic: |
1291 | usb_deregister(&usb_serial_driver); | |
1292 | ||
1da177e4 LT |
1293 | exit_tty: |
1294 | tty_unregister_driver(usb_serial_tty_driver); | |
1295 | ||
1296 | exit_reg_driver: | |
1da177e4 LT |
1297 | bus_unregister(&usb_serial_bus_type); |
1298 | ||
1299 | exit_bus: | |
194343d9 GKH |
1300 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
1301 | __func__, result); | |
1da177e4 LT |
1302 | put_tty_driver(usb_serial_tty_driver); |
1303 | return result; | |
1304 | } | |
1305 | ||
1306 | ||
1307 | static void __exit usb_serial_exit(void) | |
1308 | { | |
1309 | usb_serial_console_exit(); | |
1310 | ||
1311 | usb_serial_generic_deregister(); | |
1312 | ||
1313 | usb_deregister(&usb_serial_driver); | |
1314 | tty_unregister_driver(usb_serial_tty_driver); | |
1315 | put_tty_driver(usb_serial_tty_driver); | |
1316 | bus_unregister(&usb_serial_bus_type); | |
1317 | } | |
1318 | ||
1319 | ||
1320 | module_init(usb_serial_init); | |
1321 | module_exit(usb_serial_exit); | |
1322 | ||
1323 | #define set_to_generic_if_null(type, function) \ | |
1324 | do { \ | |
1325 | if (!type->function) { \ | |
1326 | type->function = usb_serial_generic_##function; \ | |
1327 | dbg("Had to override the " #function \ | |
a8d6f0a9 | 1328 | " usb serial operation with the generic one.");\ |
1da177e4 LT |
1329 | } \ |
1330 | } while (0) | |
1331 | ||
ea65370d | 1332 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1333 | { |
1334 | set_to_generic_if_null(device, open); | |
1335 | set_to_generic_if_null(device, write); | |
1336 | set_to_generic_if_null(device, close); | |
1337 | set_to_generic_if_null(device, write_room); | |
1338 | set_to_generic_if_null(device, chars_in_buffer); | |
1339 | set_to_generic_if_null(device, read_bulk_callback); | |
1340 | set_to_generic_if_null(device, write_bulk_callback); | |
1341 | set_to_generic_if_null(device, shutdown); | |
1342 | } | |
1343 | ||
a8d6f0a9 | 1344 | int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 | 1345 | { |
a8d6f0a9 | 1346 | /* must be called with BKL held */ |
1da177e4 LT |
1347 | int retval; |
1348 | ||
e4abe665 DY |
1349 | if (usb_disabled()) |
1350 | return -ENODEV; | |
1351 | ||
ea65370d | 1352 | fixup_generic(driver); |
1da177e4 | 1353 | |
269bda1c GKH |
1354 | if (!driver->description) |
1355 | driver->description = driver->driver.name; | |
1356 | ||
1da177e4 | 1357 | /* Add this device to our list of devices */ |
ea65370d | 1358 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1359 | |
ea65370d | 1360 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1361 | if (retval) { |
194343d9 GKH |
1362 | printk(KERN_ERR "usb-serial: problem %d when registering " |
1363 | "driver %s\n", retval, driver->description); | |
ea65370d | 1364 | list_del(&driver->driver_list); |
a8d6f0a9 | 1365 | } else |
c197a8db | 1366 | printk(KERN_INFO "USB Serial support registered for %s\n", |
a8d6f0a9 | 1367 | driver->description); |
1da177e4 LT |
1368 | |
1369 | return retval; | |
1370 | } | |
a8d6f0a9 | 1371 | EXPORT_SYMBOL_GPL(usb_serial_register); |
1da177e4 LT |
1372 | |
1373 | ||
a8d6f0a9 | 1374 | void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1375 | { |
a8d6f0a9 | 1376 | /* must be called with BKL held */ |
c197a8db GKH |
1377 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
1378 | device->description); | |
1da177e4 LT |
1379 | list_del(&device->driver_list); |
1380 | usb_serial_bus_deregister(device); | |
1381 | } | |
1da177e4 | 1382 | EXPORT_SYMBOL_GPL(usb_serial_deregister); |
1da177e4 LT |
1383 | |
1384 | /* Module information */ | |
a8d6f0a9 AC |
1385 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1386 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1387 | MODULE_LICENSE("GPL"); |
1388 | ||
1389 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1390 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |