Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * USB Serial Converter driver | |
3 | * | |
502b95c1 | 4 | * Copyright (C) 1999 - 2005 Greg Kroah-Hartman (greg@kroah.com) |
1da177e4 LT |
5 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
6 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
502b95c1 | 12 | * This driver was originally based on the ACM driver by Armin Fuerst (which was |
1da177e4 LT |
13 | * based on a driver by Brad Keryan) |
14 | * | |
a8d6f0a9 AC |
15 | * See Documentation/usb/usb-serial.txt for more information on using this |
16 | * driver | |
1da177e4 | 17 | * |
1da177e4 LT |
18 | */ |
19 | ||
1da177e4 LT |
20 | #include <linux/kernel.h> |
21 | #include <linux/errno.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/slab.h> | |
405f5571 | 24 | #include <linux/smp_lock.h> |
1da177e4 LT |
25 | #include <linux/tty.h> |
26 | #include <linux/tty_driver.h> | |
27 | #include <linux/tty_flip.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/moduleparam.h> | |
6fd69d3c | 30 | #include <linux/seq_file.h> |
1da177e4 | 31 | #include <linux/spinlock.h> |
1ce7dd26 | 32 | #include <linux/mutex.h> |
1da177e4 | 33 | #include <linux/list.h> |
a8d6f0a9 | 34 | #include <linux/uaccess.h> |
c56d3000 | 35 | #include <linux/serial.h> |
1da177e4 | 36 | #include <linux/usb.h> |
a969888c | 37 | #include <linux/usb/serial.h> |
8e8dce06 | 38 | #include <linux/kfifo.h> |
1da177e4 LT |
39 | #include "pl2303.h" |
40 | ||
41 | /* | |
42 | * Version Information | |
43 | */ | |
1da177e4 LT |
44 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
45 | #define DRIVER_DESC "USB Serial Driver core" | |
46 | ||
47 | /* Driver structure we register with the USB core */ | |
48 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
49 | .name = "usbserial", |
50 | .probe = usb_serial_probe, | |
51 | .disconnect = usb_serial_disconnect, | |
ec22559e ON |
52 | .suspend = usb_serial_suspend, |
53 | .resume = usb_serial_resume, | |
ba9dc657 | 54 | .no_dynamic_id = 1, |
1da177e4 LT |
55 | }; |
56 | ||
57 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
58 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
59 | cause the "hotplug" program to pull in whatever module is necessary | |
60 | via modprobe, and modprobe will load usbserial because the serial | |
61 | drivers depend on it. | |
62 | */ | |
63 | ||
64 | static int debug; | |
a8d6f0a9 AC |
65 | /* initially all NULL */ |
66 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; | |
3ddad823 | 67 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
68 | static LIST_HEAD(usb_serial_driver_list); |
69 | ||
8bc2c1b2 AS |
70 | /* |
71 | * Look up the serial structure. If it is found and it hasn't been | |
72 | * disconnected, return with its disc_mutex held and its refcount | |
73 | * incremented. Otherwise return NULL. | |
74 | */ | |
1da177e4 LT |
75 | struct usb_serial *usb_serial_get_by_index(unsigned index) |
76 | { | |
34ef50e5 ON |
77 | struct usb_serial *serial; |
78 | ||
3ddad823 | 79 | mutex_lock(&table_lock); |
34ef50e5 | 80 | serial = serial_table[index]; |
1da177e4 | 81 | |
8bc2c1b2 AS |
82 | if (serial) { |
83 | mutex_lock(&serial->disc_mutex); | |
84 | if (serial->disconnected) { | |
85 | mutex_unlock(&serial->disc_mutex); | |
86 | serial = NULL; | |
87 | } else { | |
88 | kref_get(&serial->kref); | |
89 | } | |
90 | } | |
3ddad823 | 91 | mutex_unlock(&table_lock); |
1da177e4 LT |
92 | return serial; |
93 | } | |
94 | ||
a8d6f0a9 AC |
95 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
96 | int num_ports, unsigned int *minor) | |
1da177e4 LT |
97 | { |
98 | unsigned int i, j; | |
99 | int good_spot; | |
100 | ||
441b62c1 | 101 | dbg("%s %d", __func__, num_ports); |
1da177e4 LT |
102 | |
103 | *minor = 0; | |
3ddad823 | 104 | mutex_lock(&table_lock); |
1da177e4 LT |
105 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
106 | if (serial_table[i]) | |
107 | continue; | |
108 | ||
109 | good_spot = 1; | |
110 | for (j = 1; j <= num_ports-1; ++j) | |
111 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
112 | good_spot = 0; | |
113 | i += j; | |
114 | break; | |
115 | } | |
116 | if (good_spot == 0) | |
117 | continue; | |
118 | ||
119 | *minor = i; | |
a1f721c8 | 120 | j = 0; |
441b62c1 | 121 | dbg("%s - minor base = %d", __func__, *minor); |
a1f721c8 | 122 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 123 | serial_table[i] = serial; |
a1f721c8 ON |
124 | serial->port[j++]->number = i; |
125 | } | |
3ddad823 | 126 | mutex_unlock(&table_lock); |
1da177e4 LT |
127 | return serial; |
128 | } | |
3ddad823 | 129 | mutex_unlock(&table_lock); |
1da177e4 LT |
130 | return NULL; |
131 | } | |
132 | ||
133 | static void return_serial(struct usb_serial *serial) | |
134 | { | |
135 | int i; | |
136 | ||
441b62c1 | 137 | dbg("%s", __func__); |
1da177e4 | 138 | |
8bc2c1b2 | 139 | mutex_lock(&table_lock); |
a8d6f0a9 | 140 | for (i = 0; i < serial->num_ports; ++i) |
1da177e4 | 141 | serial_table[serial->minor + i] = NULL; |
8bc2c1b2 | 142 | mutex_unlock(&table_lock); |
1da177e4 LT |
143 | } |
144 | ||
145 | static void destroy_serial(struct kref *kref) | |
146 | { | |
147 | struct usb_serial *serial; | |
148 | struct usb_serial_port *port; | |
149 | int i; | |
150 | ||
151 | serial = to_usb_serial(kref); | |
152 | ||
441b62c1 | 153 | dbg("%s - %s", __func__, serial->type->description); |
1da177e4 | 154 | |
521b85ae | 155 | /* return the minor range that this device had */ |
0282b7f2 AS |
156 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
157 | return_serial(serial); | |
521b85ae | 158 | |
f9c99bb8 AS |
159 | serial->type->release(serial); |
160 | ||
41bd34dd AS |
161 | /* Now that nothing is using the ports, they can be freed */ |
162 | for (i = 0; i < serial->num_port_pointers; ++i) { | |
f9c99bb8 | 163 | port = serial->port[i]; |
41bd34dd AS |
164 | if (port) { |
165 | port->serial = NULL; | |
f9c99bb8 | 166 | put_device(&port->dev); |
1da177e4 LT |
167 | } |
168 | } | |
169 | ||
170 | usb_put_dev(serial->dev); | |
a8d6f0a9 | 171 | kfree(serial); |
1da177e4 LT |
172 | } |
173 | ||
73e487fd GL |
174 | void usb_serial_put(struct usb_serial *serial) |
175 | { | |
176 | kref_put(&serial->kref, destroy_serial); | |
177 | } | |
178 | ||
1da177e4 LT |
179 | /***************************************************************************** |
180 | * Driver tty interface functions | |
181 | *****************************************************************************/ | |
f5b0953a AS |
182 | |
183 | /** | |
184 | * serial_install - install tty | |
185 | * @driver: the driver (USB in our case) | |
186 | * @tty: the tty being created | |
187 | * | |
188 | * Create the termios objects for this tty. We use the default | |
189 | * USB serial settings but permit them to be overridden by | |
190 | * serial->type->init_termios. | |
cc56cd01 AS |
191 | * |
192 | * This is the first place a new tty gets used. Hence this is where we | |
193 | * acquire references to the usb_serial structure and the driver module, | |
194 | * where we store a pointer to the port, and where we do an autoresume. | |
74556123 | 195 | * All these actions are reversed in serial_release(). |
f5b0953a AS |
196 | */ |
197 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) | |
198 | { | |
199 | int idx = tty->index; | |
200 | struct usb_serial *serial; | |
cc56cd01 AS |
201 | struct usb_serial_port *port; |
202 | int retval = -ENODEV; | |
203 | ||
ff8324df AS |
204 | dbg("%s", __func__); |
205 | ||
cc56cd01 AS |
206 | serial = usb_serial_get_by_index(idx); |
207 | if (!serial) | |
208 | return retval; | |
209 | ||
210 | port = serial->port[idx - serial->minor]; | |
211 | if (!port) | |
212 | goto error_no_port; | |
213 | if (!try_module_get(serial->type->driver.owner)) | |
214 | goto error_module_get; | |
215 | ||
7e29bb4b AS |
216 | /* perform the standard setup */ |
217 | retval = tty_init_termios(tty); | |
218 | if (retval) | |
219 | goto error_init_termios; | |
220 | ||
cc56cd01 AS |
221 | retval = usb_autopm_get_interface(serial->interface); |
222 | if (retval) | |
223 | goto error_get_interface; | |
f5b0953a | 224 | |
cc56cd01 AS |
225 | mutex_unlock(&serial->disc_mutex); |
226 | ||
7e29bb4b AS |
227 | /* allow the driver to update the settings */ |
228 | if (serial->type->init_termios) | |
229 | serial->type->init_termios(tty); | |
230 | ||
cc56cd01 AS |
231 | tty->driver_data = port; |
232 | ||
f5b0953a AS |
233 | /* Final install (we use the default method) */ |
234 | tty_driver_kref_get(driver); | |
235 | tty->count++; | |
236 | driver->ttys[idx] = tty; | |
cc56cd01 AS |
237 | return retval; |
238 | ||
cc56cd01 | 239 | error_get_interface: |
7e29bb4b | 240 | error_init_termios: |
cc56cd01 AS |
241 | module_put(serial->type->driver.owner); |
242 | error_module_get: | |
243 | error_no_port: | |
244 | usb_serial_put(serial); | |
245 | mutex_unlock(&serial->disc_mutex); | |
246 | return retval; | |
f5b0953a AS |
247 | } |
248 | ||
320348c8 | 249 | static int serial_open(struct tty_struct *tty, struct file *filp) |
1da177e4 | 250 | { |
320348c8 AS |
251 | struct usb_serial_port *port = tty->driver_data; |
252 | struct usb_serial *serial = port->serial; | |
253 | int retval; | |
331879fd | 254 | |
ff8324df AS |
255 | dbg("%s - port %d", __func__, port->number); |
256 | ||
320348c8 AS |
257 | spin_lock_irq(&port->port.lock); |
258 | if (!tty_hung_up_p(filp)) | |
259 | ++port->port.count; | |
260 | spin_unlock_irq(&port->port.lock); | |
4a90f09b | 261 | tty_port_tty_set(&port->port, tty); |
1da177e4 | 262 | |
320348c8 AS |
263 | /* Do the device-specific open only if the hardware isn't |
264 | * already initialized. | |
265 | */ | |
266 | if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) { | |
267 | if (mutex_lock_interruptible(&port->mutex)) | |
268 | return -ERESTARTSYS; | |
2d93148a | 269 | mutex_lock(&serial->disc_mutex); |
320348c8 AS |
270 | if (serial->disconnected) |
271 | retval = -ENODEV; | |
272 | else | |
273 | retval = port->serial->type->open(tty, port); | |
2d93148a | 274 | mutex_unlock(&serial->disc_mutex); |
320348c8 AS |
275 | mutex_unlock(&port->mutex); |
276 | if (retval) | |
277 | return retval; | |
c56d3000 | 278 | set_bit(ASYNCB_INITIALIZED, &port->port.flags); |
1da177e4 | 279 | } |
320348c8 | 280 | |
335f8514 AC |
281 | /* Now do the correct tty layer semantics */ |
282 | retval = tty_port_block_til_ready(&port->port, tty, filp); | |
1da177e4 LT |
283 | return retval; |
284 | } | |
285 | ||
335f8514 | 286 | /** |
74556123 | 287 | * serial_down - shut down hardware |
f5b0953a | 288 | * @port: port to shut down |
335f8514 | 289 | * |
f5b0953a AS |
290 | * Shut down a USB serial port unless it is the console. We never |
291 | * shut down the console hardware as it will always be in use. | |
335f8514 | 292 | */ |
74556123 | 293 | static void serial_down(struct usb_serial_port *port) |
1da177e4 | 294 | { |
335f8514 | 295 | struct usb_serial_driver *drv = port->serial->type; |
1da177e4 | 296 | |
f5b0953a AS |
297 | /* |
298 | * The console is magical. Do not hang up the console hardware | |
299 | * or there will be tears. | |
300 | */ | |
335f8514 | 301 | if (port->console) |
1da177e4 LT |
302 | return; |
303 | ||
ff8324df AS |
304 | /* Don't call the close method if the hardware hasn't been |
305 | * initialized. | |
306 | */ | |
307 | if (!test_and_clear_bit(ASYNCB_INITIALIZED, &port->port.flags)) | |
308 | return; | |
309 | ||
1ce7dd26 | 310 | mutex_lock(&port->mutex); |
335f8514 AC |
311 | if (drv->close) |
312 | drv->close(port); | |
1ce7dd26 | 313 | mutex_unlock(&port->mutex); |
335f8514 AC |
314 | } |
315 | ||
f5b0953a AS |
316 | static void serial_hangup(struct tty_struct *tty) |
317 | { | |
318 | struct usb_serial_port *port = tty->driver_data; | |
ff8324df AS |
319 | |
320 | dbg("%s - port %d", __func__, port->number); | |
321 | ||
74556123 | 322 | serial_down(port); |
f5b0953a | 323 | tty_port_hangup(&port->port); |
f5b0953a AS |
324 | } |
325 | ||
326 | static void serial_close(struct tty_struct *tty, struct file *filp) | |
327 | { | |
328 | struct usb_serial_port *port = tty->driver_data; | |
329 | ||
f5b0953a AS |
330 | dbg("%s - port %d", __func__, port->number); |
331 | ||
ff8324df AS |
332 | if (tty_hung_up_p(filp)) |
333 | return; | |
f5b0953a AS |
334 | if (tty_port_close_start(&port->port, tty, filp) == 0) |
335 | return; | |
74556123 | 336 | serial_down(port); |
f5b0953a AS |
337 | tty_port_close_end(&port->port, tty); |
338 | tty_port_tty_set(&port->port, NULL); | |
f5b0953a AS |
339 | } |
340 | ||
335f8514 | 341 | /** |
74556123 | 342 | * serial_release - free resources post close/hangup |
f5b0953a | 343 | * @port: port to free up |
335f8514 | 344 | * |
f5b0953a AS |
345 | * Do the resource freeing and refcount dropping for the port. |
346 | * Avoid freeing the console. | |
4455e344 | 347 | * |
f5b0953a | 348 | * Called when the last tty kref is dropped. |
335f8514 | 349 | */ |
74556123 | 350 | static void serial_release(struct tty_struct *tty) |
335f8514 | 351 | { |
4455e344 | 352 | struct usb_serial_port *port = tty->driver_data; |
335f8514 AC |
353 | struct usb_serial *serial; |
354 | struct module *owner; | |
355 | ||
f5b0953a AS |
356 | /* The console is magical. Do not hang up the console hardware |
357 | * or there will be tears. | |
358 | */ | |
cc56cd01 | 359 | if (port->console) |
335f8514 AC |
360 | return; |
361 | ||
ff8324df AS |
362 | dbg("%s - port %d", __func__, port->number); |
363 | ||
74556123 AS |
364 | /* Standard shutdown processing */ |
365 | tty_shutdown(tty); | |
366 | ||
cc56cd01 AS |
367 | tty->driver_data = NULL; |
368 | ||
335f8514 AC |
369 | serial = port->serial; |
370 | owner = serial->type->driver.owner; | |
41bd34dd | 371 | |
335f8514 AC |
372 | mutex_lock(&serial->disc_mutex); |
373 | if (!serial->disconnected) | |
374 | usb_autopm_put_interface(serial->interface); | |
375 | mutex_unlock(&serial->disc_mutex); | |
41bd34dd | 376 | |
2d93148a | 377 | usb_serial_put(serial); |
335f8514 AC |
378 | module_put(owner); |
379 | } | |
380 | ||
a8d6f0a9 AC |
381 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
382 | int count) | |
1da177e4 | 383 | { |
81671ddb | 384 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 385 | int retval = -ENODEV; |
1da177e4 | 386 | |
f34d7a5b | 387 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
388 | goto exit; |
389 | ||
441b62c1 | 390 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
1da177e4 | 391 | |
95da310e | 392 | /* count is managed under the mutex lock for the tty so cannot |
a8d6f0a9 | 393 | drop to zero until after the last close completes */ |
95da310e | 394 | WARN_ON(!port->port.count); |
1da177e4 LT |
395 | |
396 | /* pass on to the driver specific version of this function */ | |
95da310e | 397 | retval = port->serial->type->write(tty, port, buf, count); |
1da177e4 LT |
398 | |
399 | exit: | |
400 | return retval; | |
401 | } | |
402 | ||
a8d6f0a9 | 403 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 404 | { |
81671ddb | 405 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 406 | dbg("%s - port %d", __func__, port->number); |
95da310e | 407 | WARN_ON(!port->port.count); |
1da177e4 | 408 | /* pass on to the driver specific version of this function */ |
95da310e | 409 | return port->serial->type->write_room(tty); |
1da177e4 LT |
410 | } |
411 | ||
a8d6f0a9 | 412 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 413 | { |
81671ddb | 414 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 415 | dbg("%s = port %d", __func__, port->number); |
1da177e4 | 416 | |
eff6937a AC |
417 | /* if the device was unplugged then any remaining characters |
418 | fell out of the connector ;) */ | |
419 | if (port->serial->disconnected) | |
420 | return 0; | |
1da177e4 | 421 | /* pass on to the driver specific version of this function */ |
95da310e | 422 | return port->serial->type->chars_in_buffer(tty); |
1da177e4 LT |
423 | } |
424 | ||
a8d6f0a9 | 425 | static void serial_throttle(struct tty_struct *tty) |
1da177e4 | 426 | { |
81671ddb | 427 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 428 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 429 | |
95da310e | 430 | WARN_ON(!port->port.count); |
1da177e4 LT |
431 | /* pass on to the driver specific version of this function */ |
432 | if (port->serial->type->throttle) | |
95da310e | 433 | port->serial->type->throttle(tty); |
1da177e4 LT |
434 | } |
435 | ||
a8d6f0a9 | 436 | static void serial_unthrottle(struct tty_struct *tty) |
1da177e4 | 437 | { |
81671ddb | 438 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 439 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 440 | |
95da310e | 441 | WARN_ON(!port->port.count); |
1da177e4 LT |
442 | /* pass on to the driver specific version of this function */ |
443 | if (port->serial->type->unthrottle) | |
95da310e | 444 | port->serial->type->unthrottle(tty); |
1da177e4 LT |
445 | } |
446 | ||
a8d6f0a9 AC |
447 | static int serial_ioctl(struct tty_struct *tty, struct file *file, |
448 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 449 | { |
81671ddb | 450 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
451 | int retval = -ENODEV; |
452 | ||
441b62c1 | 453 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 | 454 | |
95da310e | 455 | WARN_ON(!port->port.count); |
1da177e4 | 456 | |
a8d6f0a9 AC |
457 | /* pass on to the driver specific version of this function |
458 | if it is available */ | |
f34d7a5b | 459 | if (port->serial->type->ioctl) { |
95da310e | 460 | retval = port->serial->type->ioctl(tty, file, cmd, arg); |
a8d6f0a9 | 461 | } else |
1da177e4 | 462 | retval = -ENOIOCTLCMD; |
1da177e4 LT |
463 | return retval; |
464 | } | |
465 | ||
a8d6f0a9 | 466 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 467 | { |
81671ddb | 468 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 469 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 470 | |
95da310e | 471 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
472 | /* pass on to the driver specific version of this function |
473 | if it is available */ | |
1da177e4 | 474 | if (port->serial->type->set_termios) |
95da310e | 475 | port->serial->type->set_termios(tty, port, old); |
33785091 AC |
476 | else |
477 | tty_termios_copy_hw(tty->termios, old); | |
1da177e4 LT |
478 | } |
479 | ||
9e98966c | 480 | static int serial_break(struct tty_struct *tty, int break_state) |
1da177e4 | 481 | { |
81671ddb | 482 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 483 | |
441b62c1 | 484 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 485 | |
95da310e | 486 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
487 | /* pass on to the driver specific version of this function |
488 | if it is available */ | |
6b447f04 | 489 | if (port->serial->type->break_ctl) |
95da310e | 490 | port->serial->type->break_ctl(tty, break_state); |
9e98966c | 491 | return 0; |
1da177e4 LT |
492 | } |
493 | ||
6fd69d3c | 494 | static int serial_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
495 | { |
496 | struct usb_serial *serial; | |
1da177e4 | 497 | int i; |
1da177e4 LT |
498 | char tmp[40]; |
499 | ||
441b62c1 | 500 | dbg("%s", __func__); |
6fd69d3c AD |
501 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
502 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1da177e4 LT |
503 | serial = usb_serial_get_by_index(i); |
504 | if (serial == NULL) | |
505 | continue; | |
506 | ||
6fd69d3c | 507 | seq_printf(m, "%d:", i); |
18fcac35 | 508 | if (serial->type->driver.owner) |
6fd69d3c | 509 | seq_printf(m, " module:%s", |
a8d6f0a9 | 510 | module_name(serial->type->driver.owner)); |
6fd69d3c | 511 | seq_printf(m, " name:\"%s\"", |
a8d6f0a9 | 512 | serial->type->description); |
6fd69d3c | 513 | seq_printf(m, " vendor:%04x product:%04x", |
a8d6f0a9 AC |
514 | le16_to_cpu(serial->dev->descriptor.idVendor), |
515 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
6fd69d3c AD |
516 | seq_printf(m, " num_ports:%d", serial->num_ports); |
517 | seq_printf(m, " port:%d", i - serial->minor + 1); | |
1da177e4 | 518 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
6fd69d3c | 519 | seq_printf(m, " path:%s", tmp); |
a8d6f0a9 | 520 | |
6fd69d3c | 521 | seq_putc(m, '\n'); |
73e487fd | 522 | usb_serial_put(serial); |
8bc2c1b2 | 523 | mutex_unlock(&serial->disc_mutex); |
1da177e4 | 524 | } |
6fd69d3c | 525 | return 0; |
1da177e4 LT |
526 | } |
527 | ||
6fd69d3c AD |
528 | static int serial_proc_open(struct inode *inode, struct file *file) |
529 | { | |
530 | return single_open(file, serial_proc_show, NULL); | |
531 | } | |
532 | ||
533 | static const struct file_operations serial_proc_fops = { | |
534 | .owner = THIS_MODULE, | |
535 | .open = serial_proc_open, | |
536 | .read = seq_read, | |
537 | .llseek = seq_lseek, | |
538 | .release = single_release, | |
539 | }; | |
540 | ||
a8d6f0a9 | 541 | static int serial_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 542 | { |
81671ddb | 543 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 544 | |
441b62c1 | 545 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 546 | |
95da310e | 547 | WARN_ON(!port->port.count); |
1da177e4 | 548 | if (port->serial->type->tiocmget) |
95da310e | 549 | return port->serial->type->tiocmget(tty, file); |
1da177e4 LT |
550 | return -EINVAL; |
551 | } | |
552 | ||
a8d6f0a9 | 553 | static int serial_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
554 | unsigned int set, unsigned int clear) |
555 | { | |
81671ddb | 556 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 557 | |
441b62c1 | 558 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 559 | |
95da310e | 560 | WARN_ON(!port->port.count); |
1da177e4 | 561 | if (port->serial->type->tiocmset) |
95da310e | 562 | return port->serial->type->tiocmset(tty, file, set, clear); |
1da177e4 LT |
563 | return -EINVAL; |
564 | } | |
565 | ||
cf2c7481 PZ |
566 | /* |
567 | * We would be calling tty_wakeup here, but unfortunately some line | |
568 | * disciplines have an annoying habit of calling tty->write from | |
569 | * the write wakeup callback (e.g. n_hdlc.c). | |
570 | */ | |
571 | void usb_serial_port_softint(struct usb_serial_port *port) | |
572 | { | |
573 | schedule_work(&port->work); | |
574 | } | |
a8d6f0a9 | 575 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
cf2c7481 | 576 | |
c4028958 | 577 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 578 | { |
c4028958 DH |
579 | struct usb_serial_port *port = |
580 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
581 | struct tty_struct *tty; |
582 | ||
441b62c1 | 583 | dbg("%s - port %d", __func__, port->number); |
a8d6f0a9 | 584 | |
4a90f09b | 585 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
586 | if (!tty) |
587 | return; | |
588 | ||
589 | tty_wakeup(tty); | |
4a90f09b | 590 | tty_kref_put(tty); |
1da177e4 LT |
591 | } |
592 | ||
34ef50e5 | 593 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 594 | { |
1da177e4 | 595 | usb_kill_urb(port->read_urb); |
1da177e4 | 596 | usb_kill_urb(port->write_urb); |
5adceac5 ON |
597 | /* |
598 | * This is tricky. | |
599 | * Some drivers submit the read_urb in the | |
600 | * handler for the write_urb or vice versa | |
601 | * this order determines the order in which | |
602 | * usb_kill_urb() must be used to reliably | |
603 | * kill the URBs. As it is unknown here, | |
604 | * both orders must be used in turn. | |
605 | * The call below is not redundant. | |
606 | */ | |
607 | usb_kill_urb(port->read_urb); | |
1da177e4 | 608 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 609 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
610 | } |
611 | ||
41bd34dd | 612 | static void port_release(struct device *dev) |
34ef50e5 | 613 | { |
41bd34dd AS |
614 | struct usb_serial_port *port = to_usb_serial_port(dev); |
615 | ||
616 | dbg ("%s - %s", __func__, dev_name(dev)); | |
617 | ||
2d93148a AS |
618 | /* |
619 | * Stop all the traffic before cancelling the work, so that | |
620 | * nobody will restart it by calling usb_serial_port_softint. | |
621 | */ | |
34ef50e5 | 622 | kill_traffic(port); |
2d93148a AS |
623 | cancel_work_sync(&port->work); |
624 | ||
34ef50e5 ON |
625 | usb_free_urb(port->read_urb); |
626 | usb_free_urb(port->write_urb); | |
627 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 | 628 | usb_free_urb(port->interrupt_out_urb); |
8e8dce06 DV |
629 | if (!IS_ERR(port->write_fifo) && port->write_fifo) |
630 | kfifo_free(port->write_fifo); | |
1da177e4 LT |
631 | kfree(port->bulk_in_buffer); |
632 | kfree(port->bulk_out_buffer); | |
633 | kfree(port->interrupt_in_buffer); | |
634 | kfree(port->interrupt_out_buffer); | |
635 | kfree(port); | |
636 | } | |
637 | ||
a8d6f0a9 AC |
638 | static struct usb_serial *create_serial(struct usb_device *dev, |
639 | struct usb_interface *interface, | |
640 | struct usb_serial_driver *driver) | |
1da177e4 LT |
641 | { |
642 | struct usb_serial *serial; | |
643 | ||
80b6ca48 | 644 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 645 | if (!serial) { |
441b62c1 | 646 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
647 | return NULL; |
648 | } | |
1da177e4 | 649 | serial->dev = usb_get_dev(dev); |
ea65370d | 650 | serial->type = driver; |
1da177e4 LT |
651 | serial->interface = interface; |
652 | kref_init(&serial->kref); | |
a1cd7e99 | 653 | mutex_init(&serial->disc_mutex); |
0282b7f2 | 654 | serial->minor = SERIAL_TTY_NO_MINOR; |
1da177e4 LT |
655 | |
656 | return serial; | |
657 | } | |
658 | ||
93bacefc | 659 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 660 | struct usb_serial_driver *drv) |
93bacefc GKH |
661 | { |
662 | struct usb_dynid *dynid; | |
663 | ||
664 | spin_lock(&drv->dynids.lock); | |
665 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
666 | if (usb_match_one_id(intf, &dynid->id)) { | |
667 | spin_unlock(&drv->dynids.lock); | |
668 | return &dynid->id; | |
669 | } | |
670 | } | |
671 | spin_unlock(&drv->dynids.lock); | |
672 | return NULL; | |
673 | } | |
674 | ||
675 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
676 | struct usb_interface *intf) | |
677 | { | |
678 | const struct usb_device_id *id; | |
679 | ||
680 | id = usb_match_id(intf, drv->id_table); | |
681 | if (id) { | |
682 | dbg("static descriptor matches"); | |
683 | goto exit; | |
684 | } | |
685 | id = match_dynamic_id(intf, drv); | |
686 | if (id) | |
687 | dbg("dynamic descriptor matches"); | |
688 | exit: | |
689 | return id; | |
690 | } | |
691 | ||
a8d6f0a9 AC |
692 | static struct usb_serial_driver *search_serial_device( |
693 | struct usb_interface *iface) | |
1da177e4 | 694 | { |
1da177e4 | 695 | const struct usb_device_id *id; |
063a2da8 | 696 | struct usb_serial_driver *drv; |
1da177e4 | 697 | |
93b1fae4 | 698 | /* Check if the usb id matches a known device */ |
063a2da8 AS |
699 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
700 | id = get_iface_id(drv, iface); | |
93bacefc | 701 | if (id) |
063a2da8 | 702 | return drv; |
1da177e4 LT |
703 | } |
704 | ||
705 | return NULL; | |
706 | } | |
707 | ||
335f8514 AC |
708 | static int serial_carrier_raised(struct tty_port *port) |
709 | { | |
710 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
711 | struct usb_serial_driver *drv = p->serial->type; | |
712 | if (drv->carrier_raised) | |
713 | return drv->carrier_raised(p); | |
714 | /* No carrier control - don't block */ | |
715 | return 1; | |
716 | } | |
717 | ||
718 | static void serial_dtr_rts(struct tty_port *port, int on) | |
719 | { | |
720 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
721 | struct usb_serial_driver *drv = p->serial->type; | |
722 | if (drv->dtr_rts) | |
723 | drv->dtr_rts(p, on); | |
724 | } | |
725 | ||
726 | static const struct tty_port_operations serial_port_ops = { | |
727 | .carrier_raised = serial_carrier_raised, | |
728 | .dtr_rts = serial_dtr_rts, | |
729 | }; | |
730 | ||
1da177e4 LT |
731 | int usb_serial_probe(struct usb_interface *interface, |
732 | const struct usb_device_id *id) | |
733 | { | |
a8d6f0a9 | 734 | struct usb_device *dev = interface_to_usbdev(interface); |
1da177e4 LT |
735 | struct usb_serial *serial = NULL; |
736 | struct usb_serial_port *port; | |
737 | struct usb_host_interface *iface_desc; | |
738 | struct usb_endpoint_descriptor *endpoint; | |
739 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
740 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
741 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
742 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 743 | struct usb_serial_driver *type = NULL; |
1da177e4 | 744 | int retval; |
dd9ca5d9 | 745 | unsigned int minor; |
1da177e4 LT |
746 | int buffer_size; |
747 | int i; | |
748 | int num_interrupt_in = 0; | |
749 | int num_interrupt_out = 0; | |
750 | int num_bulk_in = 0; | |
751 | int num_bulk_out = 0; | |
752 | int num_ports = 0; | |
753 | int max_endpoints; | |
754 | ||
4b10f0f3 | 755 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
756 | type = search_serial_device(interface); |
757 | if (!type) { | |
4b10f0f3 | 758 | unlock_kernel(); |
1da177e4 LT |
759 | dbg("none matched"); |
760 | return -ENODEV; | |
761 | } | |
762 | ||
a8d6f0a9 | 763 | serial = create_serial(dev, interface, type); |
1da177e4 | 764 | if (!serial) { |
4b10f0f3 | 765 | unlock_kernel(); |
441b62c1 | 766 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
767 | return -ENOMEM; |
768 | } | |
769 | ||
770 | /* if this device type has a probe function, call it */ | |
771 | if (type->probe) { | |
772 | const struct usb_device_id *id; | |
773 | ||
18fcac35 | 774 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 775 | unlock_kernel(); |
a8d6f0a9 AC |
776 | dev_err(&interface->dev, |
777 | "module get failed, exiting\n"); | |
778 | kfree(serial); | |
1da177e4 LT |
779 | return -EIO; |
780 | } | |
781 | ||
93bacefc | 782 | id = get_iface_id(type, interface); |
1da177e4 | 783 | retval = type->probe(serial, id); |
18fcac35 | 784 | module_put(type->driver.owner); |
1da177e4 LT |
785 | |
786 | if (retval) { | |
4b10f0f3 | 787 | unlock_kernel(); |
a8d6f0a9 AC |
788 | dbg("sub driver rejected device"); |
789 | kfree(serial); | |
1da177e4 LT |
790 | return retval; |
791 | } | |
792 | } | |
793 | ||
794 | /* descriptor matches, let's find the endpoints needed */ | |
795 | /* check out the endpoints */ | |
796 | iface_desc = interface->cur_altsetting; | |
797 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
798 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
799 | |
800 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
801 | /* we found a bulk in endpoint */ |
802 | dbg("found bulk in on endpoint %d", i); | |
803 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
804 | ++num_bulk_in; | |
805 | } | |
806 | ||
4fa1bbf5 | 807 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
808 | /* we found a bulk out endpoint */ |
809 | dbg("found bulk out on endpoint %d", i); | |
810 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
811 | ++num_bulk_out; | |
812 | } | |
4fa1bbf5 LFC |
813 | |
814 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
815 | /* we found a interrupt in endpoint */ |
816 | dbg("found interrupt in on endpoint %d", i); | |
817 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
818 | ++num_interrupt_in; | |
819 | } | |
820 | ||
4fa1bbf5 | 821 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
822 | /* we found an interrupt out endpoint */ |
823 | dbg("found interrupt out on endpoint %d", i); | |
824 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
825 | ++num_interrupt_out; | |
826 | } | |
827 | } | |
828 | ||
829 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
a8d6f0a9 | 830 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
1da177e4 LT |
831 | /* this is needed due to the looney way its endpoints are set up */ |
832 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
833 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
834 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
835 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
836 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
ce816cf9 AB |
837 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
838 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && | |
839 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { | |
1da177e4 LT |
840 | if (interface != dev->actconfig->interface[0]) { |
841 | /* check out the endpoints of the other interface*/ | |
842 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
843 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
844 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 845 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
846 | /* we found a interrupt in endpoint */ |
847 | dbg("found interrupt in for Prolific device on separate interface"); | |
848 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
849 | ++num_interrupt_in; | |
850 | } | |
851 | } | |
852 | } | |
853 | ||
854 | /* Now make sure the PL-2303 is configured correctly. | |
855 | * If not, give up now and hope this hack will work | |
856 | * properly during a later invocation of usb_serial_probe | |
857 | */ | |
858 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
4b10f0f3 | 859 | unlock_kernel(); |
1da177e4 | 860 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
a8d6f0a9 | 861 | kfree(serial); |
1da177e4 LT |
862 | return -ENODEV; |
863 | } | |
864 | } | |
865 | /* END HORRIBLE HACK FOR PL2303 */ | |
866 | #endif | |
867 | ||
1da177e4 LT |
868 | #ifdef CONFIG_USB_SERIAL_GENERIC |
869 | if (type == &usb_serial_generic_device) { | |
870 | num_ports = num_bulk_out; | |
871 | if (num_ports == 0) { | |
4b10f0f3 | 872 | unlock_kernel(); |
a8d6f0a9 AC |
873 | dev_err(&interface->dev, |
874 | "Generic device with no bulk out, not allowed.\n"); | |
875 | kfree(serial); | |
1da177e4 LT |
876 | return -EIO; |
877 | } | |
878 | } | |
879 | #endif | |
880 | if (!num_ports) { | |
881 | /* if this device type has a calc_num_ports function, call it */ | |
882 | if (type->calc_num_ports) { | |
18fcac35 | 883 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 884 | unlock_kernel(); |
a8d6f0a9 AC |
885 | dev_err(&interface->dev, |
886 | "module get failed, exiting\n"); | |
887 | kfree(serial); | |
1da177e4 LT |
888 | return -EIO; |
889 | } | |
a8d6f0a9 | 890 | num_ports = type->calc_num_ports(serial); |
18fcac35 | 891 | module_put(type->driver.owner); |
1da177e4 LT |
892 | } |
893 | if (!num_ports) | |
894 | num_ports = type->num_ports; | |
895 | } | |
896 | ||
1da177e4 LT |
897 | serial->num_ports = num_ports; |
898 | serial->num_bulk_in = num_bulk_in; | |
899 | serial->num_bulk_out = num_bulk_out; | |
900 | serial->num_interrupt_in = num_interrupt_in; | |
901 | serial->num_interrupt_out = num_interrupt_out; | |
902 | ||
063a2da8 AS |
903 | /* found all that we need */ |
904 | dev_info(&interface->dev, "%s converter detected\n", | |
905 | type->description); | |
906 | ||
1da177e4 | 907 | /* create our ports, we need as many as the max endpoints */ |
a8d6f0a9 AC |
908 | /* we don't use num_ports here because some devices have more |
909 | endpoint pairs than ports */ | |
1da177e4 LT |
910 | max_endpoints = max(num_bulk_in, num_bulk_out); |
911 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
912 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
913 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
914 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
915 | unlock_kernel(); |
916 | ||
a8d6f0a9 AC |
917 | dbg("%s - setting up %d port structures for this device", |
918 | __func__, max_endpoints); | |
1da177e4 | 919 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 920 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
921 | if (!port) |
922 | goto probe_error; | |
4a90f09b | 923 | tty_port_init(&port->port); |
335f8514 | 924 | port->port.ops = &serial_port_ops; |
1da177e4 | 925 | port->serial = serial; |
507ca9bc | 926 | spin_lock_init(&port->lock); |
1ce7dd26 | 927 | mutex_init(&port->mutex); |
c4028958 | 928 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 | 929 | serial->port[i] = port; |
41bd34dd AS |
930 | port->dev.parent = &interface->dev; |
931 | port->dev.driver = NULL; | |
932 | port->dev.bus = &usb_serial_bus_type; | |
933 | port->dev.release = &port_release; | |
934 | device_initialize(&port->dev); | |
1da177e4 LT |
935 | } |
936 | ||
937 | /* set up the endpoint information */ | |
938 | for (i = 0; i < num_bulk_in; ++i) { | |
939 | endpoint = bulk_in_endpoint[i]; | |
940 | port = serial->port[i]; | |
a8d6f0a9 | 941 | port->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
1da177e4 LT |
942 | if (!port->read_urb) { |
943 | dev_err(&interface->dev, "No free urbs available\n"); | |
944 | goto probe_error; | |
945 | } | |
946 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
947 | port->bulk_in_size = buffer_size; | |
948 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 949 | port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 950 | if (!port->bulk_in_buffer) { |
a8d6f0a9 AC |
951 | dev_err(&interface->dev, |
952 | "Couldn't allocate bulk_in_buffer\n"); | |
1da177e4 LT |
953 | goto probe_error; |
954 | } | |
a8d6f0a9 AC |
955 | usb_fill_bulk_urb(port->read_urb, dev, |
956 | usb_rcvbulkpipe(dev, | |
957 | endpoint->bEndpointAddress), | |
958 | port->bulk_in_buffer, buffer_size, | |
959 | serial->type->read_bulk_callback, port); | |
1da177e4 LT |
960 | } |
961 | ||
962 | for (i = 0; i < num_bulk_out; ++i) { | |
963 | endpoint = bulk_out_endpoint[i]; | |
964 | port = serial->port[i]; | |
965 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
966 | if (!port->write_urb) { | |
967 | dev_err(&interface->dev, "No free urbs available\n"); | |
968 | goto probe_error; | |
969 | } | |
8e8dce06 DV |
970 | port->write_fifo = kfifo_alloc(PAGE_SIZE, GFP_KERNEL, |
971 | &port->lock); | |
972 | if (IS_ERR(port->write_fifo)) | |
973 | goto probe_error; | |
1da177e4 LT |
974 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
975 | port->bulk_out_size = buffer_size; | |
976 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 977 | port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 978 | if (!port->bulk_out_buffer) { |
a8d6f0a9 AC |
979 | dev_err(&interface->dev, |
980 | "Couldn't allocate bulk_out_buffer\n"); | |
1da177e4 LT |
981 | goto probe_error; |
982 | } | |
a8d6f0a9 AC |
983 | usb_fill_bulk_urb(port->write_urb, dev, |
984 | usb_sndbulkpipe(dev, | |
985 | endpoint->bEndpointAddress), | |
986 | port->bulk_out_buffer, buffer_size, | |
987 | serial->type->write_bulk_callback, port); | |
1da177e4 LT |
988 | } |
989 | ||
990 | if (serial->type->read_int_callback) { | |
991 | for (i = 0; i < num_interrupt_in; ++i) { | |
992 | endpoint = interrupt_in_endpoint[i]; | |
993 | port = serial->port[i]; | |
994 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
995 | if (!port->interrupt_in_urb) { | |
a8d6f0a9 AC |
996 | dev_err(&interface->dev, |
997 | "No free urbs available\n"); | |
1da177e4 LT |
998 | goto probe_error; |
999 | } | |
1000 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
a8d6f0a9 AC |
1001 | port->interrupt_in_endpointAddress = |
1002 | endpoint->bEndpointAddress; | |
1003 | port->interrupt_in_buffer = kmalloc(buffer_size, | |
1004 | GFP_KERNEL); | |
1da177e4 | 1005 | if (!port->interrupt_in_buffer) { |
a8d6f0a9 AC |
1006 | dev_err(&interface->dev, |
1007 | "Couldn't allocate interrupt_in_buffer\n"); | |
1da177e4 LT |
1008 | goto probe_error; |
1009 | } | |
a8d6f0a9 AC |
1010 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
1011 | usb_rcvintpipe(dev, | |
1012 | endpoint->bEndpointAddress), | |
1013 | port->interrupt_in_buffer, buffer_size, | |
1014 | serial->type->read_int_callback, port, | |
1015 | endpoint->bInterval); | |
1da177e4 LT |
1016 | } |
1017 | } else if (num_interrupt_in) { | |
1018 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
1019 | } | |
a8d6f0a9 | 1020 | |
1da177e4 LT |
1021 | if (serial->type->write_int_callback) { |
1022 | for (i = 0; i < num_interrupt_out; ++i) { | |
1023 | endpoint = interrupt_out_endpoint[i]; | |
1024 | port = serial->port[i]; | |
1025 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1026 | if (!port->interrupt_out_urb) { | |
a8d6f0a9 AC |
1027 | dev_err(&interface->dev, |
1028 | "No free urbs available\n"); | |
1da177e4 LT |
1029 | goto probe_error; |
1030 | } | |
1031 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
1032 | port->interrupt_out_size = buffer_size; | |
a8d6f0a9 AC |
1033 | port->interrupt_out_endpointAddress = |
1034 | endpoint->bEndpointAddress; | |
1035 | port->interrupt_out_buffer = kmalloc(buffer_size, | |
1036 | GFP_KERNEL); | |
1da177e4 | 1037 | if (!port->interrupt_out_buffer) { |
a8d6f0a9 AC |
1038 | dev_err(&interface->dev, |
1039 | "Couldn't allocate interrupt_out_buffer\n"); | |
1da177e4 LT |
1040 | goto probe_error; |
1041 | } | |
a8d6f0a9 AC |
1042 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
1043 | usb_sndintpipe(dev, | |
1044 | endpoint->bEndpointAddress), | |
1045 | port->interrupt_out_buffer, buffer_size, | |
1046 | serial->type->write_int_callback, port, | |
1047 | endpoint->bInterval); | |
1da177e4 LT |
1048 | } |
1049 | } else if (num_interrupt_out) { | |
1050 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
1051 | } | |
a8d6f0a9 | 1052 | |
1da177e4 LT |
1053 | /* if this device type has an attach function, call it */ |
1054 | if (type->attach) { | |
18fcac35 | 1055 | if (!try_module_get(type->driver.owner)) { |
a8d6f0a9 AC |
1056 | dev_err(&interface->dev, |
1057 | "module get failed, exiting\n"); | |
1da177e4 LT |
1058 | goto probe_error; |
1059 | } | |
a8d6f0a9 | 1060 | retval = type->attach(serial); |
18fcac35 | 1061 | module_put(type->driver.owner); |
1da177e4 LT |
1062 | if (retval < 0) |
1063 | goto probe_error; | |
1064 | if (retval > 0) { | |
a8d6f0a9 AC |
1065 | /* quietly accept this device, but don't bind to a |
1066 | serial port as it's about to disappear */ | |
0a3c8549 | 1067 | serial->num_ports = 0; |
1da177e4 LT |
1068 | goto exit; |
1069 | } | |
1070 | } | |
1071 | ||
a8d6f0a9 | 1072 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
34ef50e5 ON |
1073 | dev_err(&interface->dev, "No more free serial devices\n"); |
1074 | goto probe_error; | |
1075 | } | |
c744f99e | 1076 | serial->minor = minor; |
34ef50e5 | 1077 | |
1da177e4 LT |
1078 | /* register all of the individual ports with the driver core */ |
1079 | for (i = 0; i < num_ports; ++i) { | |
1080 | port = serial->port[i]; | |
0031a06e | 1081 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
7071a3ce | 1082 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
c706ebdf | 1083 | port->dev_state = PORT_REGISTERING; |
41bd34dd | 1084 | retval = device_add(&port->dev); |
c706ebdf | 1085 | if (retval) { |
13f4db9e GKH |
1086 | dev_err(&port->dev, "Error registering port device, " |
1087 | "continuing\n"); | |
c706ebdf AS |
1088 | port->dev_state = PORT_UNREGISTERED; |
1089 | } else { | |
1090 | port->dev_state = PORT_REGISTERED; | |
1091 | } | |
1da177e4 LT |
1092 | } |
1093 | ||
a8d6f0a9 | 1094 | usb_serial_console_init(debug, minor); |
1da177e4 LT |
1095 | |
1096 | exit: | |
1097 | /* success */ | |
a8d6f0a9 | 1098 | usb_set_intfdata(interface, serial); |
1da177e4 LT |
1099 | return 0; |
1100 | ||
1101 | probe_error: | |
41bd34dd | 1102 | usb_serial_put(serial); |
1da177e4 LT |
1103 | return -EIO; |
1104 | } | |
a8d6f0a9 | 1105 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
1da177e4 LT |
1106 | |
1107 | void usb_serial_disconnect(struct usb_interface *interface) | |
1108 | { | |
1109 | int i; | |
a8d6f0a9 | 1110 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1111 | struct device *dev = &interface->dev; |
1112 | struct usb_serial_port *port; | |
1113 | ||
73e487fd | 1114 | usb_serial_console_disconnect(serial); |
a8d6f0a9 | 1115 | dbg("%s", __func__); |
1da177e4 | 1116 | |
a1cd7e99 | 1117 | mutex_lock(&serial->disc_mutex); |
a8d6f0a9 | 1118 | usb_set_intfdata(interface, NULL); |
a1cd7e99 ON |
1119 | /* must set a flag, to signal subdrivers */ |
1120 | serial->disconnected = 1; | |
2d93148a AS |
1121 | mutex_unlock(&serial->disc_mutex); |
1122 | ||
a1cd7e99 ON |
1123 | for (i = 0; i < serial->num_ports; ++i) { |
1124 | port = serial->port[i]; | |
1125 | if (port) { | |
4a90f09b AC |
1126 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1127 | if (tty) { | |
d2b39182 | 1128 | tty_vhangup(tty); |
4a90f09b AC |
1129 | tty_kref_put(tty); |
1130 | } | |
a1cd7e99 | 1131 | kill_traffic(port); |
2d93148a | 1132 | cancel_work_sync(&port->work); |
c706ebdf AS |
1133 | if (port->dev_state == PORT_REGISTERED) { |
1134 | ||
1135 | /* Make sure the port is bound so that the | |
1136 | * driver's port_remove method is called. | |
1137 | */ | |
1138 | if (!port->dev.driver) { | |
1139 | int rc; | |
1140 | ||
1141 | port->dev.driver = | |
1142 | &serial->type->driver; | |
1143 | rc = device_bind_driver(&port->dev); | |
1144 | } | |
1145 | port->dev_state = PORT_UNREGISTERING; | |
1146 | device_del(&port->dev); | |
1147 | port->dev_state = PORT_UNREGISTERED; | |
1148 | } | |
2d93148a AS |
1149 | } |
1150 | } | |
f9c99bb8 | 1151 | serial->type->disconnect(serial); |
2d93148a | 1152 | |
41bd34dd | 1153 | /* let the last holder of this object cause it to be cleaned up */ |
a1cd7e99 | 1154 | usb_serial_put(serial); |
1da177e4 LT |
1155 | dev_info(dev, "device disconnected\n"); |
1156 | } | |
a8d6f0a9 | 1157 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
1da177e4 | 1158 | |
ec22559e ON |
1159 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1160 | { | |
1161 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1162 | struct usb_serial_port *port; | |
1163 | int i, r = 0; | |
1164 | ||
f8bece8d ON |
1165 | serial->suspending = 1; |
1166 | ||
81e5b23c ON |
1167 | if (serial->type->suspend) { |
1168 | r = serial->type->suspend(serial, message); | |
1169 | if (r < 0) | |
1170 | goto err_out; | |
1171 | } | |
1172 | ||
e31c1880 ON |
1173 | for (i = 0; i < serial->num_ports; ++i) { |
1174 | port = serial->port[i]; | |
1175 | if (port) | |
1176 | kill_traffic(port); | |
ec22559e ON |
1177 | } |
1178 | ||
81e5b23c | 1179 | err_out: |
ec22559e ON |
1180 | return r; |
1181 | } | |
1182 | EXPORT_SYMBOL(usb_serial_suspend); | |
1183 | ||
1184 | int usb_serial_resume(struct usb_interface *intf) | |
1185 | { | |
1186 | struct usb_serial *serial = usb_get_intfdata(intf); | |
c49cfa91 | 1187 | int rv; |
ec22559e | 1188 | |
f8bece8d | 1189 | serial->suspending = 0; |
8abaee23 | 1190 | if (serial->type->resume) |
c49cfa91 ON |
1191 | rv = serial->type->resume(serial); |
1192 | else | |
1193 | rv = usb_serial_generic_resume(serial); | |
f8bece8d | 1194 | |
c49cfa91 | 1195 | return rv; |
ec22559e ON |
1196 | } |
1197 | EXPORT_SYMBOL(usb_serial_resume); | |
1198 | ||
b68e31d0 | 1199 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1200 | .open = serial_open, |
1201 | .close = serial_close, | |
1202 | .write = serial_write, | |
335f8514 | 1203 | .hangup = serial_hangup, |
1da177e4 LT |
1204 | .write_room = serial_write_room, |
1205 | .ioctl = serial_ioctl, | |
1206 | .set_termios = serial_set_termios, | |
1207 | .throttle = serial_throttle, | |
1208 | .unthrottle = serial_unthrottle, | |
1209 | .break_ctl = serial_break, | |
1210 | .chars_in_buffer = serial_chars_in_buffer, | |
1da177e4 LT |
1211 | .tiocmget = serial_tiocmget, |
1212 | .tiocmset = serial_tiocmset, | |
74556123 | 1213 | .shutdown = serial_release, |
fe1ae7fd | 1214 | .install = serial_install, |
6fd69d3c | 1215 | .proc_fops = &serial_proc_fops, |
1da177e4 LT |
1216 | }; |
1217 | ||
335f8514 | 1218 | |
1da177e4 LT |
1219 | struct tty_driver *usb_serial_tty_driver; |
1220 | ||
1221 | static int __init usb_serial_init(void) | |
1222 | { | |
1223 | int i; | |
1224 | int result; | |
1225 | ||
1226 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1227 | if (!usb_serial_tty_driver) | |
1228 | return -ENOMEM; | |
1229 | ||
1230 | /* Initialize our global data */ | |
a8d6f0a9 | 1231 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
1da177e4 | 1232 | serial_table[i] = NULL; |
1da177e4 LT |
1233 | |
1234 | result = bus_register(&usb_serial_bus_type); | |
1235 | if (result) { | |
194343d9 GKH |
1236 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
1237 | "failed\n", __func__); | |
1da177e4 LT |
1238 | goto exit_bus; |
1239 | } | |
1240 | ||
1da177e4 LT |
1241 | usb_serial_tty_driver->owner = THIS_MODULE; |
1242 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1243 | usb_serial_tty_driver->name = "ttyUSB"; |
1244 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1245 | usb_serial_tty_driver->minor_start = 0; | |
1246 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1247 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1248 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1249 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1250 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1251 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1252 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1253 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1254 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1255 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1256 | result = tty_register_driver(usb_serial_tty_driver); | |
1257 | if (result) { | |
194343d9 GKH |
1258 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
1259 | __func__); | |
1da177e4 LT |
1260 | goto exit_reg_driver; |
1261 | } | |
1262 | ||
1263 | /* register the USB driver */ | |
1264 | result = usb_register(&usb_serial_driver); | |
1265 | if (result < 0) { | |
194343d9 GKH |
1266 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
1267 | __func__); | |
1da177e4 LT |
1268 | goto exit_tty; |
1269 | } | |
1270 | ||
06299db3 GKH |
1271 | /* register the generic driver, if we should */ |
1272 | result = usb_serial_generic_register(debug); | |
1273 | if (result < 0) { | |
194343d9 GKH |
1274 | printk(KERN_ERR "usb-serial: %s - registering generic " |
1275 | "driver failed\n", __func__); | |
06299db3 GKH |
1276 | goto exit_generic; |
1277 | } | |
1278 | ||
c197a8db | 1279 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1280 | |
1281 | return result; | |
1282 | ||
06299db3 GKH |
1283 | exit_generic: |
1284 | usb_deregister(&usb_serial_driver); | |
1285 | ||
1da177e4 LT |
1286 | exit_tty: |
1287 | tty_unregister_driver(usb_serial_tty_driver); | |
1288 | ||
1289 | exit_reg_driver: | |
1da177e4 LT |
1290 | bus_unregister(&usb_serial_bus_type); |
1291 | ||
1292 | exit_bus: | |
194343d9 GKH |
1293 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
1294 | __func__, result); | |
1da177e4 LT |
1295 | put_tty_driver(usb_serial_tty_driver); |
1296 | return result; | |
1297 | } | |
1298 | ||
1299 | ||
1300 | static void __exit usb_serial_exit(void) | |
1301 | { | |
1302 | usb_serial_console_exit(); | |
1303 | ||
1304 | usb_serial_generic_deregister(); | |
1305 | ||
1306 | usb_deregister(&usb_serial_driver); | |
1307 | tty_unregister_driver(usb_serial_tty_driver); | |
1308 | put_tty_driver(usb_serial_tty_driver); | |
1309 | bus_unregister(&usb_serial_bus_type); | |
1310 | } | |
1311 | ||
1312 | ||
1313 | module_init(usb_serial_init); | |
1314 | module_exit(usb_serial_exit); | |
1315 | ||
1316 | #define set_to_generic_if_null(type, function) \ | |
1317 | do { \ | |
1318 | if (!type->function) { \ | |
1319 | type->function = usb_serial_generic_##function; \ | |
1320 | dbg("Had to override the " #function \ | |
a8d6f0a9 | 1321 | " usb serial operation with the generic one.");\ |
1da177e4 LT |
1322 | } \ |
1323 | } while (0) | |
1324 | ||
ea65370d | 1325 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1326 | { |
1327 | set_to_generic_if_null(device, open); | |
1328 | set_to_generic_if_null(device, write); | |
1329 | set_to_generic_if_null(device, close); | |
1330 | set_to_generic_if_null(device, write_room); | |
1331 | set_to_generic_if_null(device, chars_in_buffer); | |
1332 | set_to_generic_if_null(device, read_bulk_callback); | |
1333 | set_to_generic_if_null(device, write_bulk_callback); | |
f9c99bb8 AS |
1334 | set_to_generic_if_null(device, disconnect); |
1335 | set_to_generic_if_null(device, release); | |
1da177e4 LT |
1336 | } |
1337 | ||
a8d6f0a9 | 1338 | int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 | 1339 | { |
a8d6f0a9 | 1340 | /* must be called with BKL held */ |
1da177e4 LT |
1341 | int retval; |
1342 | ||
e4abe665 DY |
1343 | if (usb_disabled()) |
1344 | return -ENODEV; | |
1345 | ||
ea65370d | 1346 | fixup_generic(driver); |
1da177e4 | 1347 | |
269bda1c GKH |
1348 | if (!driver->description) |
1349 | driver->description = driver->driver.name; | |
1350 | ||
1da177e4 | 1351 | /* Add this device to our list of devices */ |
ea65370d | 1352 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1353 | |
ea65370d | 1354 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1355 | if (retval) { |
194343d9 GKH |
1356 | printk(KERN_ERR "usb-serial: problem %d when registering " |
1357 | "driver %s\n", retval, driver->description); | |
ea65370d | 1358 | list_del(&driver->driver_list); |
a8d6f0a9 | 1359 | } else |
c197a8db | 1360 | printk(KERN_INFO "USB Serial support registered for %s\n", |
a8d6f0a9 | 1361 | driver->description); |
1da177e4 LT |
1362 | |
1363 | return retval; | |
1364 | } | |
a8d6f0a9 | 1365 | EXPORT_SYMBOL_GPL(usb_serial_register); |
1da177e4 LT |
1366 | |
1367 | ||
a8d6f0a9 | 1368 | void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1369 | { |
a8d6f0a9 | 1370 | /* must be called with BKL held */ |
c197a8db GKH |
1371 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
1372 | device->description); | |
1da177e4 LT |
1373 | list_del(&device->driver_list); |
1374 | usb_serial_bus_deregister(device); | |
1375 | } | |
1da177e4 | 1376 | EXPORT_SYMBOL_GPL(usb_serial_deregister); |
1da177e4 LT |
1377 | |
1378 | /* Module information */ | |
a8d6f0a9 AC |
1379 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1380 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1381 | MODULE_LICENSE("GPL"); |
1382 | ||
1383 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1384 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |