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Commit | Line | Data |
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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> | |
29 | #include <linux/spinlock.h> | |
1ce7dd26 | 30 | #include <linux/mutex.h> |
1da177e4 | 31 | #include <linux/list.h> |
a8d6f0a9 | 32 | #include <linux/uaccess.h> |
1da177e4 | 33 | #include <linux/usb.h> |
a969888c | 34 | #include <linux/usb/serial.h> |
1da177e4 LT |
35 | #include "pl2303.h" |
36 | ||
37 | /* | |
38 | * Version Information | |
39 | */ | |
1da177e4 LT |
40 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
41 | #define DRIVER_DESC "USB Serial Driver core" | |
42 | ||
34f8e761 PZ |
43 | static void port_free(struct usb_serial_port *port); |
44 | ||
1da177e4 LT |
45 | /* Driver structure we register with the USB core */ |
46 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
47 | .name = "usbserial", |
48 | .probe = usb_serial_probe, | |
49 | .disconnect = usb_serial_disconnect, | |
ec22559e ON |
50 | .suspend = usb_serial_suspend, |
51 | .resume = usb_serial_resume, | |
ba9dc657 | 52 | .no_dynamic_id = 1, |
1da177e4 LT |
53 | }; |
54 | ||
55 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
56 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
57 | cause the "hotplug" program to pull in whatever module is necessary | |
58 | via modprobe, and modprobe will load usbserial because the serial | |
59 | drivers depend on it. | |
60 | */ | |
61 | ||
62 | static int debug; | |
a8d6f0a9 AC |
63 | /* initially all NULL */ |
64 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; | |
3ddad823 | 65 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
66 | static LIST_HEAD(usb_serial_driver_list); |
67 | ||
68 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
69 | { | |
34ef50e5 ON |
70 | struct usb_serial *serial; |
71 | ||
3ddad823 | 72 | mutex_lock(&table_lock); |
34ef50e5 | 73 | serial = serial_table[index]; |
1da177e4 LT |
74 | |
75 | if (serial) | |
76 | kref_get(&serial->kref); | |
3ddad823 | 77 | mutex_unlock(&table_lock); |
1da177e4 LT |
78 | return serial; |
79 | } | |
80 | ||
a8d6f0a9 AC |
81 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
82 | int num_ports, unsigned int *minor) | |
1da177e4 LT |
83 | { |
84 | unsigned int i, j; | |
85 | int good_spot; | |
86 | ||
441b62c1 | 87 | dbg("%s %d", __func__, num_ports); |
1da177e4 LT |
88 | |
89 | *minor = 0; | |
3ddad823 | 90 | mutex_lock(&table_lock); |
1da177e4 LT |
91 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
92 | if (serial_table[i]) | |
93 | continue; | |
94 | ||
95 | good_spot = 1; | |
96 | for (j = 1; j <= num_ports-1; ++j) | |
97 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
98 | good_spot = 0; | |
99 | i += j; | |
100 | break; | |
101 | } | |
102 | if (good_spot == 0) | |
103 | continue; | |
104 | ||
105 | *minor = i; | |
a1f721c8 | 106 | j = 0; |
441b62c1 | 107 | dbg("%s - minor base = %d", __func__, *minor); |
a1f721c8 | 108 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 109 | serial_table[i] = serial; |
a1f721c8 ON |
110 | serial->port[j++]->number = i; |
111 | } | |
3ddad823 | 112 | mutex_unlock(&table_lock); |
1da177e4 LT |
113 | return serial; |
114 | } | |
3ddad823 | 115 | mutex_unlock(&table_lock); |
1da177e4 LT |
116 | return NULL; |
117 | } | |
118 | ||
119 | static void return_serial(struct usb_serial *serial) | |
120 | { | |
121 | int i; | |
122 | ||
441b62c1 | 123 | dbg("%s", __func__); |
1da177e4 | 124 | |
a8d6f0a9 | 125 | for (i = 0; i < serial->num_ports; ++i) |
1da177e4 | 126 | serial_table[serial->minor + i] = NULL; |
1da177e4 LT |
127 | } |
128 | ||
129 | static void destroy_serial(struct kref *kref) | |
130 | { | |
131 | struct usb_serial *serial; | |
132 | struct usb_serial_port *port; | |
133 | int i; | |
134 | ||
135 | serial = to_usb_serial(kref); | |
136 | ||
441b62c1 | 137 | dbg("%s - %s", __func__, serial->type->description); |
1da177e4 | 138 | |
521b85ae JR |
139 | serial->type->shutdown(serial); |
140 | ||
141 | /* return the minor range that this device had */ | |
0282b7f2 AS |
142 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
143 | return_serial(serial); | |
521b85ae | 144 | |
1da177e4 | 145 | for (i = 0; i < serial->num_ports; ++i) |
95da310e | 146 | serial->port[i]->port.count = 0; |
1da177e4 LT |
147 | |
148 | /* the ports are cleaned up and released in port_release() */ | |
149 | for (i = 0; i < serial->num_ports; ++i) | |
150 | if (serial->port[i]->dev.parent != NULL) { | |
151 | device_unregister(&serial->port[i]->dev); | |
152 | serial->port[i] = NULL; | |
153 | } | |
154 | ||
155 | /* If this is a "fake" port, we have to clean it up here, as it will | |
156 | * not get cleaned up in port_release() as it was never registered with | |
157 | * the driver core */ | |
158 | if (serial->num_ports < serial->num_port_pointers) { | |
a8d6f0a9 AC |
159 | for (i = serial->num_ports; |
160 | i < serial->num_port_pointers; ++i) { | |
1da177e4 LT |
161 | port = serial->port[i]; |
162 | if (!port) | |
163 | continue; | |
34f8e761 | 164 | port_free(port); |
1da177e4 LT |
165 | } |
166 | } | |
167 | ||
168 | usb_put_dev(serial->dev); | |
169 | ||
170 | /* free up any memory that we allocated */ | |
a8d6f0a9 | 171 | kfree(serial); |
1da177e4 LT |
172 | } |
173 | ||
73e487fd GL |
174 | void usb_serial_put(struct usb_serial *serial) |
175 | { | |
3ddad823 | 176 | mutex_lock(&table_lock); |
73e487fd | 177 | kref_put(&serial->kref, destroy_serial); |
3ddad823 | 178 | mutex_unlock(&table_lock); |
73e487fd GL |
179 | } |
180 | ||
1da177e4 LT |
181 | /***************************************************************************** |
182 | * Driver tty interface functions | |
183 | *****************************************************************************/ | |
a8d6f0a9 | 184 | static int serial_open (struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
185 | { |
186 | struct usb_serial *serial; | |
187 | struct usb_serial_port *port; | |
188 | unsigned int portNumber; | |
189 | int retval; | |
a8d6f0a9 | 190 | |
441b62c1 | 191 | dbg("%s", __func__); |
1da177e4 LT |
192 | |
193 | /* get the serial object associated with this tty pointer */ | |
194 | serial = usb_serial_get_by_index(tty->index); | |
195 | if (!serial) { | |
196 | tty->driver_data = NULL; | |
197 | return -ENODEV; | |
198 | } | |
199 | ||
200 | portNumber = tty->index - serial->minor; | |
201 | port = serial->port[portNumber]; | |
71a84163 LFC |
202 | if (!port) { |
203 | retval = -ENODEV; | |
204 | goto bailout_kref_put; | |
205 | } | |
8a4613f0 | 206 | |
71a84163 LFC |
207 | if (mutex_lock_interruptible(&port->mutex)) { |
208 | retval = -ERESTARTSYS; | |
209 | goto bailout_kref_put; | |
210 | } | |
a8d6f0a9 | 211 | |
95da310e | 212 | ++port->port.count; |
1da177e4 | 213 | |
ca85485c PF |
214 | /* set up our port structure making the tty driver |
215 | * remember our port object, and us it */ | |
216 | tty->driver_data = port; | |
4a90f09b | 217 | tty_port_tty_set(&port->port, tty); |
1da177e4 | 218 | |
95da310e | 219 | if (port->port.count == 1) { |
1da177e4 LT |
220 | |
221 | /* lock this module before we call it | |
222 | * this may fail, which means we must bail out, | |
223 | * safe because we are called with BKL held */ | |
18fcac35 | 224 | if (!try_module_get(serial->type->driver.owner)) { |
1da177e4 | 225 | retval = -ENODEV; |
71a84163 | 226 | goto bailout_mutex_unlock; |
1da177e4 LT |
227 | } |
228 | ||
f0fbd5b9 SS |
229 | retval = usb_autopm_get_interface(serial->interface); |
230 | if (retval) | |
231 | goto bailout_module_put; | |
a8d6f0a9 | 232 | /* only call the device specific open if this |
1da177e4 | 233 | * is the first time the port is opened */ |
95da310e | 234 | retval = serial->type->open(tty, port, filp); |
1da177e4 | 235 | if (retval) |
f0fbd5b9 | 236 | goto bailout_interface_put; |
1da177e4 LT |
237 | } |
238 | ||
1ce7dd26 | 239 | mutex_unlock(&port->mutex); |
1da177e4 LT |
240 | return 0; |
241 | ||
f0fbd5b9 SS |
242 | bailout_interface_put: |
243 | usb_autopm_put_interface(serial->interface); | |
1da177e4 | 244 | bailout_module_put: |
18fcac35 | 245 | module_put(serial->type->driver.owner); |
71a84163 | 246 | bailout_mutex_unlock: |
95da310e | 247 | port->port.count = 0; |
b059c81a | 248 | tty->driver_data = NULL; |
4a90f09b | 249 | tty_port_tty_set(&port->port, NULL); |
1ce7dd26 | 250 | mutex_unlock(&port->mutex); |
71a84163 | 251 | bailout_kref_put: |
73e487fd | 252 | usb_serial_put(serial); |
1da177e4 LT |
253 | return retval; |
254 | } | |
255 | ||
a8d6f0a9 | 256 | static void serial_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 257 | { |
81671ddb | 258 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
259 | |
260 | if (!port) | |
261 | return; | |
262 | ||
441b62c1 | 263 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 264 | |
1ce7dd26 | 265 | mutex_lock(&port->mutex); |
8a4613f0 | 266 | |
95da310e | 267 | if (port->port.count == 0) { |
1ce7dd26 | 268 | mutex_unlock(&port->mutex); |
91c0bce2 GKH |
269 | return; |
270 | } | |
1da177e4 | 271 | |
4bd43f2c | 272 | if (port->port.count == 1) |
a8d6f0a9 | 273 | /* only call the device specific close if this |
4bd43f2c AC |
274 | * port is being closed by the last owner. Ensure we do |
275 | * this before we drop the port count. The call is protected | |
276 | * by the port mutex | |
277 | */ | |
95da310e | 278 | port->serial->type->close(tty, port, filp); |
1da177e4 | 279 | |
4bd43f2c | 280 | if (port->port.count == (port->console ? 2 : 1)) { |
4a90f09b AC |
281 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
282 | if (tty) { | |
4bd43f2c AC |
283 | /* We must do this before we drop the port count to |
284 | zero. */ | |
4a90f09b AC |
285 | if (tty->driver_data) |
286 | tty->driver_data = NULL; | |
287 | tty_port_tty_set(&port->port, NULL); | |
fce4877a | 288 | tty_kref_put(tty); |
1da177e4 | 289 | } |
9a6b1efa | 290 | } |
1da177e4 | 291 | |
4bd43f2c | 292 | if (port->port.count == 1) { |
62ad296b ON |
293 | mutex_lock(&port->serial->disc_mutex); |
294 | if (!port->serial->disconnected) | |
295 | usb_autopm_put_interface(port->serial->interface); | |
296 | mutex_unlock(&port->serial->disc_mutex); | |
18fcac35 | 297 | module_put(port->serial->type->driver.owner); |
f0fbd5b9 | 298 | } |
4bd43f2c | 299 | --port->port.count; |
1da177e4 | 300 | |
1ce7dd26 | 301 | mutex_unlock(&port->mutex); |
73e487fd | 302 | usb_serial_put(port->serial); |
1da177e4 LT |
303 | } |
304 | ||
a8d6f0a9 AC |
305 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
306 | int count) | |
1da177e4 | 307 | { |
81671ddb | 308 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 309 | int retval = -ENODEV; |
1da177e4 | 310 | |
f34d7a5b | 311 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
312 | goto exit; |
313 | ||
441b62c1 | 314 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
1da177e4 | 315 | |
95da310e | 316 | /* count is managed under the mutex lock for the tty so cannot |
a8d6f0a9 | 317 | drop to zero until after the last close completes */ |
95da310e | 318 | WARN_ON(!port->port.count); |
1da177e4 LT |
319 | |
320 | /* pass on to the driver specific version of this function */ | |
95da310e | 321 | retval = port->serial->type->write(tty, port, buf, count); |
1da177e4 LT |
322 | |
323 | exit: | |
324 | return retval; | |
325 | } | |
326 | ||
a8d6f0a9 | 327 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 328 | { |
81671ddb | 329 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 330 | dbg("%s - port %d", __func__, port->number); |
95da310e | 331 | WARN_ON(!port->port.count); |
1da177e4 | 332 | /* pass on to the driver specific version of this function */ |
95da310e | 333 | return port->serial->type->write_room(tty); |
1da177e4 LT |
334 | } |
335 | ||
a8d6f0a9 | 336 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 337 | { |
81671ddb | 338 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 339 | dbg("%s = port %d", __func__, port->number); |
1da177e4 | 340 | |
95da310e | 341 | WARN_ON(!port->port.count); |
eff6937a AC |
342 | /* if the device was unplugged then any remaining characters |
343 | fell out of the connector ;) */ | |
344 | if (port->serial->disconnected) | |
345 | return 0; | |
1da177e4 | 346 | /* pass on to the driver specific version of this function */ |
95da310e | 347 | return port->serial->type->chars_in_buffer(tty); |
1da177e4 LT |
348 | } |
349 | ||
a8d6f0a9 | 350 | static void serial_throttle(struct tty_struct *tty) |
1da177e4 | 351 | { |
81671ddb | 352 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 353 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 354 | |
95da310e | 355 | WARN_ON(!port->port.count); |
1da177e4 LT |
356 | /* pass on to the driver specific version of this function */ |
357 | if (port->serial->type->throttle) | |
95da310e | 358 | port->serial->type->throttle(tty); |
1da177e4 LT |
359 | } |
360 | ||
a8d6f0a9 | 361 | static void serial_unthrottle(struct tty_struct *tty) |
1da177e4 | 362 | { |
81671ddb | 363 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 364 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 365 | |
95da310e | 366 | WARN_ON(!port->port.count); |
1da177e4 LT |
367 | /* pass on to the driver specific version of this function */ |
368 | if (port->serial->type->unthrottle) | |
95da310e | 369 | port->serial->type->unthrottle(tty); |
1da177e4 LT |
370 | } |
371 | ||
a8d6f0a9 AC |
372 | static int serial_ioctl(struct tty_struct *tty, struct file *file, |
373 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 374 | { |
81671ddb | 375 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
376 | int retval = -ENODEV; |
377 | ||
441b62c1 | 378 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 | 379 | |
95da310e | 380 | WARN_ON(!port->port.count); |
1da177e4 | 381 | |
a8d6f0a9 AC |
382 | /* pass on to the driver specific version of this function |
383 | if it is available */ | |
f34d7a5b | 384 | if (port->serial->type->ioctl) { |
95da310e | 385 | retval = port->serial->type->ioctl(tty, file, cmd, arg); |
a8d6f0a9 | 386 | } else |
1da177e4 | 387 | retval = -ENOIOCTLCMD; |
1da177e4 LT |
388 | return retval; |
389 | } | |
390 | ||
a8d6f0a9 | 391 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 392 | { |
81671ddb | 393 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 394 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 395 | |
95da310e | 396 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
397 | /* pass on to the driver specific version of this function |
398 | if it is available */ | |
1da177e4 | 399 | if (port->serial->type->set_termios) |
95da310e | 400 | port->serial->type->set_termios(tty, port, old); |
33785091 AC |
401 | else |
402 | tty_termios_copy_hw(tty->termios, old); | |
1da177e4 LT |
403 | } |
404 | ||
9e98966c | 405 | static int serial_break(struct tty_struct *tty, int break_state) |
1da177e4 | 406 | { |
81671ddb | 407 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 408 | |
441b62c1 | 409 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 410 | |
95da310e | 411 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
412 | /* pass on to the driver specific version of this function |
413 | if it is available */ | |
6b447f04 | 414 | if (port->serial->type->break_ctl) |
95da310e | 415 | port->serial->type->break_ctl(tty, break_state); |
9e98966c | 416 | return 0; |
1da177e4 LT |
417 | } |
418 | ||
a8d6f0a9 AC |
419 | static int serial_read_proc(char *page, char **start, off_t off, int count, |
420 | int *eof, void *data) | |
1da177e4 LT |
421 | { |
422 | struct usb_serial *serial; | |
423 | int length = 0; | |
424 | int i; | |
425 | off_t begin = 0; | |
426 | char tmp[40]; | |
427 | ||
441b62c1 | 428 | dbg("%s", __func__); |
a8d6f0a9 | 429 | length += sprintf(page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
430 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
431 | serial = usb_serial_get_by_index(i); | |
432 | if (serial == NULL) | |
433 | continue; | |
434 | ||
a8d6f0a9 | 435 | length += sprintf(page+length, "%d:", i); |
18fcac35 | 436 | if (serial->type->driver.owner) |
a8d6f0a9 AC |
437 | length += sprintf(page+length, " module:%s", |
438 | module_name(serial->type->driver.owner)); | |
439 | length += sprintf(page+length, " name:\"%s\"", | |
440 | serial->type->description); | |
441 | length += sprintf(page+length, " vendor:%04x product:%04x", | |
442 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
443 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
444 | length += sprintf(page+length, " num_ports:%d", | |
445 | serial->num_ports); | |
446 | length += sprintf(page+length, " port:%d", | |
447 | i - serial->minor + 1); | |
1da177e4 | 448 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
a8d6f0a9 AC |
449 | length += sprintf(page+length, " path:%s", tmp); |
450 | ||
451 | length += sprintf(page+length, "\n"); | |
59925838 MU |
452 | if ((length + begin) > (off + count)) { |
453 | usb_serial_put(serial); | |
1da177e4 | 454 | goto done; |
59925838 | 455 | } |
1da177e4 LT |
456 | if ((length + begin) < off) { |
457 | begin += length; | |
458 | length = 0; | |
459 | } | |
73e487fd | 460 | usb_serial_put(serial); |
1da177e4 LT |
461 | } |
462 | *eof = 1; | |
463 | done: | |
464 | if (off >= (length + begin)) | |
465 | return 0; | |
466 | *start = page + (off-begin); | |
a8d6f0a9 | 467 | return (count < begin+length-off) ? count : begin+length-off; |
1da177e4 LT |
468 | } |
469 | ||
a8d6f0a9 | 470 | static int serial_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 471 | { |
81671ddb | 472 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 473 | |
441b62c1 | 474 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 475 | |
95da310e | 476 | WARN_ON(!port->port.count); |
1da177e4 | 477 | if (port->serial->type->tiocmget) |
95da310e | 478 | return port->serial->type->tiocmget(tty, file); |
1da177e4 LT |
479 | return -EINVAL; |
480 | } | |
481 | ||
a8d6f0a9 | 482 | static int serial_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
483 | unsigned int set, unsigned int clear) |
484 | { | |
81671ddb | 485 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 486 | |
441b62c1 | 487 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 488 | |
95da310e | 489 | WARN_ON(!port->port.count); |
1da177e4 | 490 | if (port->serial->type->tiocmset) |
95da310e | 491 | return port->serial->type->tiocmset(tty, file, set, clear); |
1da177e4 LT |
492 | return -EINVAL; |
493 | } | |
494 | ||
cf2c7481 PZ |
495 | /* |
496 | * We would be calling tty_wakeup here, but unfortunately some line | |
497 | * disciplines have an annoying habit of calling tty->write from | |
498 | * the write wakeup callback (e.g. n_hdlc.c). | |
499 | */ | |
500 | void usb_serial_port_softint(struct usb_serial_port *port) | |
501 | { | |
502 | schedule_work(&port->work); | |
503 | } | |
a8d6f0a9 | 504 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
cf2c7481 | 505 | |
c4028958 | 506 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 507 | { |
c4028958 DH |
508 | struct usb_serial_port *port = |
509 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
510 | struct tty_struct *tty; |
511 | ||
441b62c1 | 512 | dbg("%s - port %d", __func__, port->number); |
a8d6f0a9 | 513 | |
4a90f09b | 514 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
515 | if (!tty) |
516 | return; | |
517 | ||
518 | tty_wakeup(tty); | |
4a90f09b | 519 | tty_kref_put(tty); |
1da177e4 LT |
520 | } |
521 | ||
522 | static void port_release(struct device *dev) | |
523 | { | |
524 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
525 | ||
7071a3ce | 526 | dbg ("%s - %s", __func__, dev_name(dev)); |
34f8e761 PZ |
527 | port_free(port); |
528 | } | |
529 | ||
34ef50e5 | 530 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 531 | { |
1da177e4 | 532 | usb_kill_urb(port->read_urb); |
1da177e4 | 533 | usb_kill_urb(port->write_urb); |
5adceac5 ON |
534 | /* |
535 | * This is tricky. | |
536 | * Some drivers submit the read_urb in the | |
537 | * handler for the write_urb or vice versa | |
538 | * this order determines the order in which | |
539 | * usb_kill_urb() must be used to reliably | |
540 | * kill the URBs. As it is unknown here, | |
541 | * both orders must be used in turn. | |
542 | * The call below is not redundant. | |
543 | */ | |
544 | usb_kill_urb(port->read_urb); | |
1da177e4 | 545 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 546 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
547 | } |
548 | ||
549 | static void port_free(struct usb_serial_port *port) | |
550 | { | |
551 | kill_traffic(port); | |
552 | usb_free_urb(port->read_urb); | |
553 | usb_free_urb(port->write_urb); | |
554 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 LT |
555 | usb_free_urb(port->interrupt_out_urb); |
556 | kfree(port->bulk_in_buffer); | |
557 | kfree(port->bulk_out_buffer); | |
558 | kfree(port->interrupt_in_buffer); | |
559 | kfree(port->interrupt_out_buffer); | |
34f8e761 | 560 | flush_scheduled_work(); /* port->work */ |
1da177e4 LT |
561 | kfree(port); |
562 | } | |
563 | ||
a8d6f0a9 AC |
564 | static struct usb_serial *create_serial(struct usb_device *dev, |
565 | struct usb_interface *interface, | |
566 | struct usb_serial_driver *driver) | |
1da177e4 LT |
567 | { |
568 | struct usb_serial *serial; | |
569 | ||
80b6ca48 | 570 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 571 | if (!serial) { |
441b62c1 | 572 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
573 | return NULL; |
574 | } | |
1da177e4 | 575 | serial->dev = usb_get_dev(dev); |
ea65370d | 576 | serial->type = driver; |
1da177e4 LT |
577 | serial->interface = interface; |
578 | kref_init(&serial->kref); | |
a1cd7e99 | 579 | mutex_init(&serial->disc_mutex); |
0282b7f2 | 580 | serial->minor = SERIAL_TTY_NO_MINOR; |
1da177e4 LT |
581 | |
582 | return serial; | |
583 | } | |
584 | ||
93bacefc | 585 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 586 | struct usb_serial_driver *drv) |
93bacefc GKH |
587 | { |
588 | struct usb_dynid *dynid; | |
589 | ||
590 | spin_lock(&drv->dynids.lock); | |
591 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
592 | if (usb_match_one_id(intf, &dynid->id)) { | |
593 | spin_unlock(&drv->dynids.lock); | |
594 | return &dynid->id; | |
595 | } | |
596 | } | |
597 | spin_unlock(&drv->dynids.lock); | |
598 | return NULL; | |
599 | } | |
600 | ||
601 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
602 | struct usb_interface *intf) | |
603 | { | |
604 | const struct usb_device_id *id; | |
605 | ||
606 | id = usb_match_id(intf, drv->id_table); | |
607 | if (id) { | |
608 | dbg("static descriptor matches"); | |
609 | goto exit; | |
610 | } | |
611 | id = match_dynamic_id(intf, drv); | |
612 | if (id) | |
613 | dbg("dynamic descriptor matches"); | |
614 | exit: | |
615 | return id; | |
616 | } | |
617 | ||
a8d6f0a9 AC |
618 | static struct usb_serial_driver *search_serial_device( |
619 | struct usb_interface *iface) | |
1da177e4 | 620 | { |
1da177e4 | 621 | const struct usb_device_id *id; |
063a2da8 | 622 | struct usb_serial_driver *drv; |
1da177e4 | 623 | |
93b1fae4 | 624 | /* Check if the usb id matches a known device */ |
063a2da8 AS |
625 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
626 | id = get_iface_id(drv, iface); | |
93bacefc | 627 | if (id) |
063a2da8 | 628 | return drv; |
1da177e4 LT |
629 | } |
630 | ||
631 | return NULL; | |
632 | } | |
633 | ||
634 | int usb_serial_probe(struct usb_interface *interface, | |
635 | const struct usb_device_id *id) | |
636 | { | |
a8d6f0a9 | 637 | struct usb_device *dev = interface_to_usbdev(interface); |
1da177e4 LT |
638 | struct usb_serial *serial = NULL; |
639 | struct usb_serial_port *port; | |
640 | struct usb_host_interface *iface_desc; | |
641 | struct usb_endpoint_descriptor *endpoint; | |
642 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
643 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
644 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
645 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 646 | struct usb_serial_driver *type = NULL; |
1da177e4 | 647 | int retval; |
dd9ca5d9 | 648 | unsigned int minor; |
1da177e4 LT |
649 | int buffer_size; |
650 | int i; | |
651 | int num_interrupt_in = 0; | |
652 | int num_interrupt_out = 0; | |
653 | int num_bulk_in = 0; | |
654 | int num_bulk_out = 0; | |
655 | int num_ports = 0; | |
656 | int max_endpoints; | |
657 | ||
4b10f0f3 | 658 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
659 | type = search_serial_device(interface); |
660 | if (!type) { | |
4b10f0f3 | 661 | unlock_kernel(); |
1da177e4 LT |
662 | dbg("none matched"); |
663 | return -ENODEV; | |
664 | } | |
665 | ||
a8d6f0a9 | 666 | serial = create_serial(dev, interface, type); |
1da177e4 | 667 | if (!serial) { |
4b10f0f3 | 668 | unlock_kernel(); |
441b62c1 | 669 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
670 | return -ENOMEM; |
671 | } | |
672 | ||
673 | /* if this device type has a probe function, call it */ | |
674 | if (type->probe) { | |
675 | const struct usb_device_id *id; | |
676 | ||
18fcac35 | 677 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 678 | unlock_kernel(); |
a8d6f0a9 AC |
679 | dev_err(&interface->dev, |
680 | "module get failed, exiting\n"); | |
681 | kfree(serial); | |
1da177e4 LT |
682 | return -EIO; |
683 | } | |
684 | ||
93bacefc | 685 | id = get_iface_id(type, interface); |
1da177e4 | 686 | retval = type->probe(serial, id); |
18fcac35 | 687 | module_put(type->driver.owner); |
1da177e4 LT |
688 | |
689 | if (retval) { | |
4b10f0f3 | 690 | unlock_kernel(); |
a8d6f0a9 AC |
691 | dbg("sub driver rejected device"); |
692 | kfree(serial); | |
1da177e4 LT |
693 | return retval; |
694 | } | |
695 | } | |
696 | ||
697 | /* descriptor matches, let's find the endpoints needed */ | |
698 | /* check out the endpoints */ | |
699 | iface_desc = interface->cur_altsetting; | |
700 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
701 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
702 | |
703 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
704 | /* we found a bulk in endpoint */ |
705 | dbg("found bulk in on endpoint %d", i); | |
706 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
707 | ++num_bulk_in; | |
708 | } | |
709 | ||
4fa1bbf5 | 710 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
711 | /* we found a bulk out endpoint */ |
712 | dbg("found bulk out on endpoint %d", i); | |
713 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
714 | ++num_bulk_out; | |
715 | } | |
4fa1bbf5 LFC |
716 | |
717 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
718 | /* we found a interrupt in endpoint */ |
719 | dbg("found interrupt in on endpoint %d", i); | |
720 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
721 | ++num_interrupt_in; | |
722 | } | |
723 | ||
4fa1bbf5 | 724 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
725 | /* we found an interrupt out endpoint */ |
726 | dbg("found interrupt out on endpoint %d", i); | |
727 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
728 | ++num_interrupt_out; | |
729 | } | |
730 | } | |
731 | ||
732 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
a8d6f0a9 | 733 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
1da177e4 LT |
734 | /* this is needed due to the looney way its endpoints are set up */ |
735 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
736 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
737 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
738 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
739 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
ce816cf9 AB |
740 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
741 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && | |
742 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { | |
1da177e4 LT |
743 | if (interface != dev->actconfig->interface[0]) { |
744 | /* check out the endpoints of the other interface*/ | |
745 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
746 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
747 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 748 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
749 | /* we found a interrupt in endpoint */ |
750 | dbg("found interrupt in for Prolific device on separate interface"); | |
751 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
752 | ++num_interrupt_in; | |
753 | } | |
754 | } | |
755 | } | |
756 | ||
757 | /* Now make sure the PL-2303 is configured correctly. | |
758 | * If not, give up now and hope this hack will work | |
759 | * properly during a later invocation of usb_serial_probe | |
760 | */ | |
761 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
4b10f0f3 | 762 | unlock_kernel(); |
1da177e4 | 763 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
a8d6f0a9 | 764 | kfree(serial); |
1da177e4 LT |
765 | return -ENODEV; |
766 | } | |
767 | } | |
768 | /* END HORRIBLE HACK FOR PL2303 */ | |
769 | #endif | |
770 | ||
1da177e4 LT |
771 | #ifdef CONFIG_USB_SERIAL_GENERIC |
772 | if (type == &usb_serial_generic_device) { | |
773 | num_ports = num_bulk_out; | |
774 | if (num_ports == 0) { | |
4b10f0f3 | 775 | unlock_kernel(); |
a8d6f0a9 AC |
776 | dev_err(&interface->dev, |
777 | "Generic device with no bulk out, not allowed.\n"); | |
778 | kfree(serial); | |
1da177e4 LT |
779 | return -EIO; |
780 | } | |
781 | } | |
782 | #endif | |
783 | if (!num_ports) { | |
784 | /* if this device type has a calc_num_ports function, call it */ | |
785 | if (type->calc_num_ports) { | |
18fcac35 | 786 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 787 | unlock_kernel(); |
a8d6f0a9 AC |
788 | dev_err(&interface->dev, |
789 | "module get failed, exiting\n"); | |
790 | kfree(serial); | |
1da177e4 LT |
791 | return -EIO; |
792 | } | |
a8d6f0a9 | 793 | num_ports = type->calc_num_ports(serial); |
18fcac35 | 794 | module_put(type->driver.owner); |
1da177e4 LT |
795 | } |
796 | if (!num_ports) | |
797 | num_ports = type->num_ports; | |
798 | } | |
799 | ||
1da177e4 LT |
800 | serial->num_ports = num_ports; |
801 | serial->num_bulk_in = num_bulk_in; | |
802 | serial->num_bulk_out = num_bulk_out; | |
803 | serial->num_interrupt_in = num_interrupt_in; | |
804 | serial->num_interrupt_out = num_interrupt_out; | |
805 | ||
063a2da8 AS |
806 | /* found all that we need */ |
807 | dev_info(&interface->dev, "%s converter detected\n", | |
808 | type->description); | |
809 | ||
1da177e4 | 810 | /* create our ports, we need as many as the max endpoints */ |
a8d6f0a9 AC |
811 | /* we don't use num_ports here because some devices have more |
812 | endpoint pairs than ports */ | |
1da177e4 LT |
813 | max_endpoints = max(num_bulk_in, num_bulk_out); |
814 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
815 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
816 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
817 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
818 | unlock_kernel(); |
819 | ||
a8d6f0a9 AC |
820 | dbg("%s - setting up %d port structures for this device", |
821 | __func__, max_endpoints); | |
1da177e4 | 822 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 823 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
824 | if (!port) |
825 | goto probe_error; | |
4a90f09b | 826 | tty_port_init(&port->port); |
1da177e4 | 827 | port->serial = serial; |
507ca9bc | 828 | spin_lock_init(&port->lock); |
1ce7dd26 | 829 | mutex_init(&port->mutex); |
c4028958 | 830 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
831 | serial->port[i] = port; |
832 | } | |
833 | ||
834 | /* set up the endpoint information */ | |
835 | for (i = 0; i < num_bulk_in; ++i) { | |
836 | endpoint = bulk_in_endpoint[i]; | |
837 | port = serial->port[i]; | |
a8d6f0a9 | 838 | port->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
1da177e4 LT |
839 | if (!port->read_urb) { |
840 | dev_err(&interface->dev, "No free urbs available\n"); | |
841 | goto probe_error; | |
842 | } | |
843 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
844 | port->bulk_in_size = buffer_size; | |
845 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 846 | port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 847 | if (!port->bulk_in_buffer) { |
a8d6f0a9 AC |
848 | dev_err(&interface->dev, |
849 | "Couldn't allocate bulk_in_buffer\n"); | |
1da177e4 LT |
850 | goto probe_error; |
851 | } | |
a8d6f0a9 AC |
852 | usb_fill_bulk_urb(port->read_urb, dev, |
853 | usb_rcvbulkpipe(dev, | |
854 | endpoint->bEndpointAddress), | |
855 | port->bulk_in_buffer, buffer_size, | |
856 | serial->type->read_bulk_callback, port); | |
1da177e4 LT |
857 | } |
858 | ||
859 | for (i = 0; i < num_bulk_out; ++i) { | |
860 | endpoint = bulk_out_endpoint[i]; | |
861 | port = serial->port[i]; | |
862 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
863 | if (!port->write_urb) { | |
864 | dev_err(&interface->dev, "No free urbs available\n"); | |
865 | goto probe_error; | |
866 | } | |
867 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
868 | port->bulk_out_size = buffer_size; | |
869 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 870 | port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 871 | if (!port->bulk_out_buffer) { |
a8d6f0a9 AC |
872 | dev_err(&interface->dev, |
873 | "Couldn't allocate bulk_out_buffer\n"); | |
1da177e4 LT |
874 | goto probe_error; |
875 | } | |
a8d6f0a9 AC |
876 | usb_fill_bulk_urb(port->write_urb, dev, |
877 | usb_sndbulkpipe(dev, | |
878 | endpoint->bEndpointAddress), | |
879 | port->bulk_out_buffer, buffer_size, | |
880 | serial->type->write_bulk_callback, port); | |
1da177e4 LT |
881 | } |
882 | ||
883 | if (serial->type->read_int_callback) { | |
884 | for (i = 0; i < num_interrupt_in; ++i) { | |
885 | endpoint = interrupt_in_endpoint[i]; | |
886 | port = serial->port[i]; | |
887 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
888 | if (!port->interrupt_in_urb) { | |
a8d6f0a9 AC |
889 | dev_err(&interface->dev, |
890 | "No free urbs available\n"); | |
1da177e4 LT |
891 | goto probe_error; |
892 | } | |
893 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
a8d6f0a9 AC |
894 | port->interrupt_in_endpointAddress = |
895 | endpoint->bEndpointAddress; | |
896 | port->interrupt_in_buffer = kmalloc(buffer_size, | |
897 | GFP_KERNEL); | |
1da177e4 | 898 | if (!port->interrupt_in_buffer) { |
a8d6f0a9 AC |
899 | dev_err(&interface->dev, |
900 | "Couldn't allocate interrupt_in_buffer\n"); | |
1da177e4 LT |
901 | goto probe_error; |
902 | } | |
a8d6f0a9 AC |
903 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
904 | usb_rcvintpipe(dev, | |
905 | endpoint->bEndpointAddress), | |
906 | port->interrupt_in_buffer, buffer_size, | |
907 | serial->type->read_int_callback, port, | |
908 | endpoint->bInterval); | |
1da177e4 LT |
909 | } |
910 | } else if (num_interrupt_in) { | |
911 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
912 | } | |
a8d6f0a9 | 913 | |
1da177e4 LT |
914 | if (serial->type->write_int_callback) { |
915 | for (i = 0; i < num_interrupt_out; ++i) { | |
916 | endpoint = interrupt_out_endpoint[i]; | |
917 | port = serial->port[i]; | |
918 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
919 | if (!port->interrupt_out_urb) { | |
a8d6f0a9 AC |
920 | dev_err(&interface->dev, |
921 | "No free urbs available\n"); | |
1da177e4 LT |
922 | goto probe_error; |
923 | } | |
924 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
925 | port->interrupt_out_size = buffer_size; | |
a8d6f0a9 AC |
926 | port->interrupt_out_endpointAddress = |
927 | endpoint->bEndpointAddress; | |
928 | port->interrupt_out_buffer = kmalloc(buffer_size, | |
929 | GFP_KERNEL); | |
1da177e4 | 930 | if (!port->interrupt_out_buffer) { |
a8d6f0a9 AC |
931 | dev_err(&interface->dev, |
932 | "Couldn't allocate interrupt_out_buffer\n"); | |
1da177e4 LT |
933 | goto probe_error; |
934 | } | |
a8d6f0a9 AC |
935 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
936 | usb_sndintpipe(dev, | |
937 | endpoint->bEndpointAddress), | |
938 | port->interrupt_out_buffer, buffer_size, | |
939 | serial->type->write_int_callback, port, | |
940 | endpoint->bInterval); | |
1da177e4 LT |
941 | } |
942 | } else if (num_interrupt_out) { | |
943 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
944 | } | |
a8d6f0a9 | 945 | |
1da177e4 LT |
946 | /* if this device type has an attach function, call it */ |
947 | if (type->attach) { | |
18fcac35 | 948 | if (!try_module_get(type->driver.owner)) { |
a8d6f0a9 AC |
949 | dev_err(&interface->dev, |
950 | "module get failed, exiting\n"); | |
1da177e4 LT |
951 | goto probe_error; |
952 | } | |
a8d6f0a9 | 953 | retval = type->attach(serial); |
18fcac35 | 954 | module_put(type->driver.owner); |
1da177e4 LT |
955 | if (retval < 0) |
956 | goto probe_error; | |
957 | if (retval > 0) { | |
a8d6f0a9 AC |
958 | /* quietly accept this device, but don't bind to a |
959 | serial port as it's about to disappear */ | |
1da177e4 LT |
960 | goto exit; |
961 | } | |
962 | } | |
963 | ||
a8d6f0a9 | 964 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
34ef50e5 ON |
965 | dev_err(&interface->dev, "No more free serial devices\n"); |
966 | goto probe_error; | |
967 | } | |
c744f99e | 968 | serial->minor = minor; |
34ef50e5 | 969 | |
1da177e4 LT |
970 | /* register all of the individual ports with the driver core */ |
971 | for (i = 0; i < num_ports; ++i) { | |
972 | port = serial->port[i]; | |
973 | port->dev.parent = &interface->dev; | |
974 | port->dev.driver = NULL; | |
975 | port->dev.bus = &usb_serial_bus_type; | |
976 | port->dev.release = &port_release; | |
977 | ||
0031a06e | 978 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
7071a3ce | 979 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
13f4db9e GKH |
980 | retval = device_register(&port->dev); |
981 | if (retval) | |
982 | dev_err(&port->dev, "Error registering port device, " | |
983 | "continuing\n"); | |
1da177e4 LT |
984 | } |
985 | ||
a8d6f0a9 | 986 | usb_serial_console_init(debug, minor); |
1da177e4 LT |
987 | |
988 | exit: | |
989 | /* success */ | |
a8d6f0a9 | 990 | usb_set_intfdata(interface, serial); |
1da177e4 LT |
991 | return 0; |
992 | ||
993 | probe_error: | |
994 | for (i = 0; i < num_bulk_in; ++i) { | |
995 | port = serial->port[i]; | |
996 | if (!port) | |
997 | continue; | |
95d43166 | 998 | usb_free_urb(port->read_urb); |
1da177e4 LT |
999 | kfree(port->bulk_in_buffer); |
1000 | } | |
1001 | for (i = 0; i < num_bulk_out; ++i) { | |
1002 | port = serial->port[i]; | |
1003 | if (!port) | |
1004 | continue; | |
95d43166 | 1005 | usb_free_urb(port->write_urb); |
1da177e4 LT |
1006 | kfree(port->bulk_out_buffer); |
1007 | } | |
1008 | for (i = 0; i < num_interrupt_in; ++i) { | |
1009 | port = serial->port[i]; | |
1010 | if (!port) | |
1011 | continue; | |
95d43166 | 1012 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 LT |
1013 | kfree(port->interrupt_in_buffer); |
1014 | } | |
1015 | for (i = 0; i < num_interrupt_out; ++i) { | |
1016 | port = serial->port[i]; | |
1017 | if (!port) | |
1018 | continue; | |
95d43166 | 1019 | usb_free_urb(port->interrupt_out_urb); |
1da177e4 LT |
1020 | kfree(port->interrupt_out_buffer); |
1021 | } | |
1022 | ||
1da177e4 LT |
1023 | /* free up any memory that we allocated */ |
1024 | for (i = 0; i < serial->num_port_pointers; ++i) | |
1025 | kfree(serial->port[i]); | |
a8d6f0a9 | 1026 | kfree(serial); |
1da177e4 LT |
1027 | return -EIO; |
1028 | } | |
a8d6f0a9 | 1029 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
1da177e4 LT |
1030 | |
1031 | void usb_serial_disconnect(struct usb_interface *interface) | |
1032 | { | |
1033 | int i; | |
a8d6f0a9 | 1034 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1035 | struct device *dev = &interface->dev; |
1036 | struct usb_serial_port *port; | |
1037 | ||
73e487fd | 1038 | usb_serial_console_disconnect(serial); |
a8d6f0a9 | 1039 | dbg("%s", __func__); |
1da177e4 | 1040 | |
a1cd7e99 | 1041 | mutex_lock(&serial->disc_mutex); |
a8d6f0a9 | 1042 | usb_set_intfdata(interface, NULL); |
a1cd7e99 ON |
1043 | /* must set a flag, to signal subdrivers */ |
1044 | serial->disconnected = 1; | |
1045 | for (i = 0; i < serial->num_ports; ++i) { | |
1046 | port = serial->port[i]; | |
1047 | if (port) { | |
4a90f09b AC |
1048 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1049 | if (tty) { | |
1050 | tty_hangup(tty); | |
1051 | tty_kref_put(tty); | |
1052 | } | |
a1cd7e99 | 1053 | kill_traffic(port); |
1da177e4 | 1054 | } |
1da177e4 | 1055 | } |
a1cd7e99 ON |
1056 | /* let the last holder of this object |
1057 | * cause it to be cleaned up */ | |
1058 | mutex_unlock(&serial->disc_mutex); | |
1059 | usb_serial_put(serial); | |
1da177e4 LT |
1060 | dev_info(dev, "device disconnected\n"); |
1061 | } | |
a8d6f0a9 | 1062 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
1da177e4 | 1063 | |
ec22559e ON |
1064 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1065 | { | |
1066 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1067 | struct usb_serial_port *port; | |
1068 | int i, r = 0; | |
1069 | ||
e31c1880 ON |
1070 | for (i = 0; i < serial->num_ports; ++i) { |
1071 | port = serial->port[i]; | |
1072 | if (port) | |
1073 | kill_traffic(port); | |
ec22559e ON |
1074 | } |
1075 | ||
1076 | if (serial->type->suspend) | |
e31c1880 | 1077 | r = serial->type->suspend(serial, message); |
ec22559e ON |
1078 | |
1079 | return r; | |
1080 | } | |
1081 | EXPORT_SYMBOL(usb_serial_suspend); | |
1082 | ||
1083 | int usb_serial_resume(struct usb_interface *intf) | |
1084 | { | |
1085 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1086 | ||
8abaee23 SS |
1087 | if (serial->type->resume) |
1088 | return serial->type->resume(serial); | |
1089 | return 0; | |
ec22559e ON |
1090 | } |
1091 | EXPORT_SYMBOL(usb_serial_resume); | |
1092 | ||
b68e31d0 | 1093 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1094 | .open = serial_open, |
1095 | .close = serial_close, | |
1096 | .write = serial_write, | |
1097 | .write_room = serial_write_room, | |
1098 | .ioctl = serial_ioctl, | |
1099 | .set_termios = serial_set_termios, | |
1100 | .throttle = serial_throttle, | |
1101 | .unthrottle = serial_unthrottle, | |
1102 | .break_ctl = serial_break, | |
1103 | .chars_in_buffer = serial_chars_in_buffer, | |
1104 | .read_proc = serial_read_proc, | |
1105 | .tiocmget = serial_tiocmget, | |
1106 | .tiocmset = serial_tiocmset, | |
1107 | }; | |
1108 | ||
1109 | struct tty_driver *usb_serial_tty_driver; | |
1110 | ||
1111 | static int __init usb_serial_init(void) | |
1112 | { | |
1113 | int i; | |
1114 | int result; | |
1115 | ||
1116 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1117 | if (!usb_serial_tty_driver) | |
1118 | return -ENOMEM; | |
1119 | ||
1120 | /* Initialize our global data */ | |
a8d6f0a9 | 1121 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
1da177e4 | 1122 | serial_table[i] = NULL; |
1da177e4 LT |
1123 | |
1124 | result = bus_register(&usb_serial_bus_type); | |
1125 | if (result) { | |
194343d9 GKH |
1126 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
1127 | "failed\n", __func__); | |
1da177e4 LT |
1128 | goto exit_bus; |
1129 | } | |
1130 | ||
1da177e4 LT |
1131 | usb_serial_tty_driver->owner = THIS_MODULE; |
1132 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1133 | usb_serial_tty_driver->name = "ttyUSB"; |
1134 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1135 | usb_serial_tty_driver->minor_start = 0; | |
1136 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1137 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1138 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1139 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1140 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1141 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1142 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1143 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1144 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1145 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1146 | result = tty_register_driver(usb_serial_tty_driver); | |
1147 | if (result) { | |
194343d9 GKH |
1148 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
1149 | __func__); | |
1da177e4 LT |
1150 | goto exit_reg_driver; |
1151 | } | |
1152 | ||
1153 | /* register the USB driver */ | |
1154 | result = usb_register(&usb_serial_driver); | |
1155 | if (result < 0) { | |
194343d9 GKH |
1156 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
1157 | __func__); | |
1da177e4 LT |
1158 | goto exit_tty; |
1159 | } | |
1160 | ||
06299db3 GKH |
1161 | /* register the generic driver, if we should */ |
1162 | result = usb_serial_generic_register(debug); | |
1163 | if (result < 0) { | |
194343d9 GKH |
1164 | printk(KERN_ERR "usb-serial: %s - registering generic " |
1165 | "driver failed\n", __func__); | |
06299db3 GKH |
1166 | goto exit_generic; |
1167 | } | |
1168 | ||
c197a8db | 1169 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1170 | |
1171 | return result; | |
1172 | ||
06299db3 GKH |
1173 | exit_generic: |
1174 | usb_deregister(&usb_serial_driver); | |
1175 | ||
1da177e4 LT |
1176 | exit_tty: |
1177 | tty_unregister_driver(usb_serial_tty_driver); | |
1178 | ||
1179 | exit_reg_driver: | |
1da177e4 LT |
1180 | bus_unregister(&usb_serial_bus_type); |
1181 | ||
1182 | exit_bus: | |
194343d9 GKH |
1183 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
1184 | __func__, result); | |
1da177e4 LT |
1185 | put_tty_driver(usb_serial_tty_driver); |
1186 | return result; | |
1187 | } | |
1188 | ||
1189 | ||
1190 | static void __exit usb_serial_exit(void) | |
1191 | { | |
1192 | usb_serial_console_exit(); | |
1193 | ||
1194 | usb_serial_generic_deregister(); | |
1195 | ||
1196 | usb_deregister(&usb_serial_driver); | |
1197 | tty_unregister_driver(usb_serial_tty_driver); | |
1198 | put_tty_driver(usb_serial_tty_driver); | |
1199 | bus_unregister(&usb_serial_bus_type); | |
1200 | } | |
1201 | ||
1202 | ||
1203 | module_init(usb_serial_init); | |
1204 | module_exit(usb_serial_exit); | |
1205 | ||
1206 | #define set_to_generic_if_null(type, function) \ | |
1207 | do { \ | |
1208 | if (!type->function) { \ | |
1209 | type->function = usb_serial_generic_##function; \ | |
1210 | dbg("Had to override the " #function \ | |
a8d6f0a9 | 1211 | " usb serial operation with the generic one.");\ |
1da177e4 LT |
1212 | } \ |
1213 | } while (0) | |
1214 | ||
ea65370d | 1215 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1216 | { |
1217 | set_to_generic_if_null(device, open); | |
1218 | set_to_generic_if_null(device, write); | |
1219 | set_to_generic_if_null(device, close); | |
1220 | set_to_generic_if_null(device, write_room); | |
1221 | set_to_generic_if_null(device, chars_in_buffer); | |
1222 | set_to_generic_if_null(device, read_bulk_callback); | |
1223 | set_to_generic_if_null(device, write_bulk_callback); | |
1224 | set_to_generic_if_null(device, shutdown); | |
f0fbd5b9 | 1225 | set_to_generic_if_null(device, resume); |
1da177e4 LT |
1226 | } |
1227 | ||
a8d6f0a9 | 1228 | int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 | 1229 | { |
a8d6f0a9 | 1230 | /* must be called with BKL held */ |
1da177e4 LT |
1231 | int retval; |
1232 | ||
ea65370d | 1233 | fixup_generic(driver); |
1da177e4 | 1234 | |
269bda1c GKH |
1235 | if (!driver->description) |
1236 | driver->description = driver->driver.name; | |
1237 | ||
1da177e4 | 1238 | /* Add this device to our list of devices */ |
ea65370d | 1239 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1240 | |
ea65370d | 1241 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1242 | if (retval) { |
194343d9 GKH |
1243 | printk(KERN_ERR "usb-serial: problem %d when registering " |
1244 | "driver %s\n", retval, driver->description); | |
ea65370d | 1245 | list_del(&driver->driver_list); |
a8d6f0a9 | 1246 | } else |
c197a8db | 1247 | printk(KERN_INFO "USB Serial support registered for %s\n", |
a8d6f0a9 | 1248 | driver->description); |
1da177e4 LT |
1249 | |
1250 | return retval; | |
1251 | } | |
a8d6f0a9 | 1252 | EXPORT_SYMBOL_GPL(usb_serial_register); |
1da177e4 LT |
1253 | |
1254 | ||
a8d6f0a9 | 1255 | void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1256 | { |
a8d6f0a9 | 1257 | /* must be called with BKL held */ |
c197a8db GKH |
1258 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
1259 | device->description); | |
1da177e4 LT |
1260 | list_del(&device->driver_list); |
1261 | usb_serial_bus_deregister(device); | |
1262 | } | |
1da177e4 | 1263 | EXPORT_SYMBOL_GPL(usb_serial_deregister); |
1da177e4 LT |
1264 | |
1265 | /* Module information */ | |
a8d6f0a9 AC |
1266 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1267 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1268 | MODULE_LICENSE("GPL"); |
1269 | ||
1270 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1271 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |