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Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * USB Serial Converter driver | |
4 | * | |
659597b7 | 5 | * Copyright (C) 2009 - 2013 Johan Hovold (jhovold@gmail.com) |
7186364e | 6 | * Copyright (C) 1999 - 2012 Greg Kroah-Hartman (greg@kroah.com) |
1da177e4 LT |
7 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
8 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) | |
9 | * | |
502b95c1 | 10 | * This driver was originally based on the ACM driver by Armin Fuerst (which was |
1da177e4 LT |
11 | * based on a driver by Brad Keryan) |
12 | * | |
a8d6f0a9 AC |
13 | * See Documentation/usb/usb-serial.txt for more information on using this |
14 | * driver | |
1da177e4 LT |
15 | */ |
16 | ||
92931d24 GKH |
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
18 | ||
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/errno.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/tty.h> | |
24 | #include <linux/tty_driver.h> | |
25 | #include <linux/tty_flip.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/moduleparam.h> | |
6fd69d3c | 28 | #include <linux/seq_file.h> |
1da177e4 | 29 | #include <linux/spinlock.h> |
1ce7dd26 | 30 | #include <linux/mutex.h> |
1da177e4 | 31 | #include <linux/list.h> |
a8d6f0a9 | 32 | #include <linux/uaccess.h> |
c56d3000 | 33 | #include <linux/serial.h> |
1da177e4 | 34 | #include <linux/usb.h> |
a969888c | 35 | #include <linux/usb/serial.h> |
8e8dce06 | 36 | #include <linux/kfifo.h> |
e5b1e206 | 37 | #include <linux/idr.h> |
1da177e4 | 38 | |
ee42f6c9 | 39 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@linuxfoundation.org>" |
1da177e4 LT |
40 | #define DRIVER_DESC "USB Serial Driver core" |
41 | ||
455b4f7e GKH |
42 | #define USB_SERIAL_TTY_MAJOR 188 |
43 | #define USB_SERIAL_TTY_MINORS 512 /* should be enough for a while */ | |
44 | ||
1da177e4 LT |
45 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead |
46 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
47 | cause the "hotplug" program to pull in whatever module is necessary | |
48 | via modprobe, and modprobe will load usbserial because the serial | |
49 | drivers depend on it. | |
50 | */ | |
51 | ||
e5b1e206 | 52 | static DEFINE_IDR(serial_minors); |
3ddad823 | 53 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
54 | static LIST_HEAD(usb_serial_driver_list); |
55 | ||
8bc2c1b2 | 56 | /* |
e5b1e206 GKH |
57 | * Look up the serial port structure. If it is found and it hasn't been |
58 | * disconnected, return with the parent usb_serial structure's disc_mutex held | |
59 | * and its refcount incremented. Otherwise return NULL. | |
8bc2c1b2 | 60 | */ |
e5b1e206 | 61 | struct usb_serial_port *usb_serial_port_get_by_minor(unsigned minor) |
1da177e4 | 62 | { |
34ef50e5 | 63 | struct usb_serial *serial; |
e5b1e206 | 64 | struct usb_serial_port *port; |
34ef50e5 | 65 | |
3ddad823 | 66 | mutex_lock(&table_lock); |
e5b1e206 GKH |
67 | port = idr_find(&serial_minors, minor); |
68 | if (!port) | |
69 | goto exit; | |
70 | ||
71 | serial = port->serial; | |
72 | mutex_lock(&serial->disc_mutex); | |
73 | if (serial->disconnected) { | |
74 | mutex_unlock(&serial->disc_mutex); | |
75 | port = NULL; | |
76 | } else { | |
77 | kref_get(&serial->kref); | |
8bc2c1b2 | 78 | } |
e5b1e206 | 79 | exit: |
3ddad823 | 80 | mutex_unlock(&table_lock); |
e5b1e206 | 81 | return port; |
1da177e4 LT |
82 | } |
83 | ||
e5b1e206 | 84 | static int allocate_minors(struct usb_serial *serial, int num_ports) |
1da177e4 | 85 | { |
e5b1e206 | 86 | struct usb_serial_port *port; |
1da177e4 | 87 | unsigned int i, j; |
e5b1e206 | 88 | int minor; |
1da177e4 | 89 | |
92931d24 | 90 | dev_dbg(&serial->interface->dev, "%s %d\n", __func__, num_ports); |
1da177e4 | 91 | |
3ddad823 | 92 | mutex_lock(&table_lock); |
e5b1e206 GKH |
93 | for (i = 0; i < num_ports; ++i) { |
94 | port = serial->port[i]; | |
194e958c JH |
95 | minor = idr_alloc(&serial_minors, port, 0, |
96 | USB_SERIAL_TTY_MINORS, GFP_KERNEL); | |
e5b1e206 GKH |
97 | if (minor < 0) |
98 | goto error; | |
99 | port->minor = minor; | |
100 | port->port_number = i; | |
1da177e4 | 101 | } |
e5b1e206 | 102 | serial->minors_reserved = 1; |
3ddad823 | 103 | mutex_unlock(&table_lock); |
e5b1e206 GKH |
104 | return 0; |
105 | error: | |
106 | /* unwind the already allocated minors */ | |
107 | for (j = 0; j < i; ++j) | |
108 | idr_remove(&serial_minors, serial->port[j]->minor); | |
109 | mutex_unlock(&table_lock); | |
110 | return minor; | |
1da177e4 LT |
111 | } |
112 | ||
e5b1e206 | 113 | static void release_minors(struct usb_serial *serial) |
1da177e4 LT |
114 | { |
115 | int i; | |
116 | ||
8bc2c1b2 | 117 | mutex_lock(&table_lock); |
a8d6f0a9 | 118 | for (i = 0; i < serial->num_ports; ++i) |
e5b1e206 | 119 | idr_remove(&serial_minors, serial->port[i]->minor); |
8bc2c1b2 | 120 | mutex_unlock(&table_lock); |
e5b1e206 | 121 | serial->minors_reserved = 0; |
1da177e4 LT |
122 | } |
123 | ||
124 | static void destroy_serial(struct kref *kref) | |
125 | { | |
126 | struct usb_serial *serial; | |
127 | struct usb_serial_port *port; | |
128 | int i; | |
129 | ||
130 | serial = to_usb_serial(kref); | |
131 | ||
521b85ae | 132 | /* return the minor range that this device had */ |
e5b1e206 GKH |
133 | if (serial->minors_reserved) |
134 | release_minors(serial); | |
521b85ae | 135 | |
79b80b8a | 136 | if (serial->attached && serial->type->release) |
a4720c65 | 137 | serial->type->release(serial); |
f9c99bb8 | 138 | |
41bd34dd AS |
139 | /* Now that nothing is using the ports, they can be freed */ |
140 | for (i = 0; i < serial->num_port_pointers; ++i) { | |
f9c99bb8 | 141 | port = serial->port[i]; |
41bd34dd AS |
142 | if (port) { |
143 | port->serial = NULL; | |
f9c99bb8 | 144 | put_device(&port->dev); |
1da177e4 LT |
145 | } |
146 | } | |
147 | ||
d7971051 | 148 | usb_put_intf(serial->interface); |
1da177e4 | 149 | usb_put_dev(serial->dev); |
a8d6f0a9 | 150 | kfree(serial); |
1da177e4 LT |
151 | } |
152 | ||
73e487fd GL |
153 | void usb_serial_put(struct usb_serial *serial) |
154 | { | |
155 | kref_put(&serial->kref, destroy_serial); | |
156 | } | |
157 | ||
1da177e4 LT |
158 | /***************************************************************************** |
159 | * Driver tty interface functions | |
160 | *****************************************************************************/ | |
f5b0953a AS |
161 | |
162 | /** | |
163 | * serial_install - install tty | |
164 | * @driver: the driver (USB in our case) | |
165 | * @tty: the tty being created | |
166 | * | |
167 | * Create the termios objects for this tty. We use the default | |
168 | * USB serial settings but permit them to be overridden by | |
169 | * serial->type->init_termios. | |
cc56cd01 AS |
170 | * |
171 | * This is the first place a new tty gets used. Hence this is where we | |
172 | * acquire references to the usb_serial structure and the driver module, | |
173 | * where we store a pointer to the port, and where we do an autoresume. | |
f278a2f7 | 174 | * All these actions are reversed in serial_cleanup(). |
f5b0953a AS |
175 | */ |
176 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) | |
177 | { | |
178 | int idx = tty->index; | |
179 | struct usb_serial *serial; | |
cc56cd01 AS |
180 | struct usb_serial_port *port; |
181 | int retval = -ENODEV; | |
182 | ||
e5b1e206 GKH |
183 | port = usb_serial_port_get_by_minor(idx); |
184 | if (!port) | |
cc56cd01 AS |
185 | return retval; |
186 | ||
e5b1e206 | 187 | serial = port->serial; |
cc56cd01 AS |
188 | if (!try_module_get(serial->type->driver.owner)) |
189 | goto error_module_get; | |
190 | ||
191 | retval = usb_autopm_get_interface(serial->interface); | |
192 | if (retval) | |
193 | goto error_get_interface; | |
f5b0953a | 194 | |
ca4ff100 | 195 | retval = tty_port_install(&port->port, driver, tty); |
76f82a7a JS |
196 | if (retval) |
197 | goto error_init_termios; | |
198 | ||
cc56cd01 AS |
199 | mutex_unlock(&serial->disc_mutex); |
200 | ||
7e29bb4b AS |
201 | /* allow the driver to update the settings */ |
202 | if (serial->type->init_termios) | |
203 | serial->type->init_termios(tty); | |
204 | ||
cc56cd01 AS |
205 | tty->driver_data = port; |
206 | ||
cc56cd01 AS |
207 | return retval; |
208 | ||
7e29bb4b | 209 | error_init_termios: |
76f82a7a JS |
210 | usb_autopm_put_interface(serial->interface); |
211 | error_get_interface: | |
cc56cd01 AS |
212 | module_put(serial->type->driver.owner); |
213 | error_module_get: | |
cc56cd01 AS |
214 | usb_serial_put(serial); |
215 | mutex_unlock(&serial->disc_mutex); | |
216 | return retval; | |
f5b0953a AS |
217 | } |
218 | ||
395e08da | 219 | static int serial_port_activate(struct tty_port *tport, struct tty_struct *tty) |
1da177e4 | 220 | { |
64bc3979 AC |
221 | struct usb_serial_port *port = |
222 | container_of(tport, struct usb_serial_port, port); | |
320348c8 AS |
223 | struct usb_serial *serial = port->serial; |
224 | int retval; | |
331879fd | 225 | |
64bc3979 AC |
226 | mutex_lock(&serial->disc_mutex); |
227 | if (serial->disconnected) | |
228 | retval = -ENODEV; | |
229 | else | |
230 | retval = port->serial->type->open(tty, port); | |
231 | mutex_unlock(&serial->disc_mutex); | |
3827d876 JH |
232 | |
233 | if (retval < 0) | |
234 | retval = usb_translate_errors(retval); | |
235 | ||
64bc3979 AC |
236 | return retval; |
237 | } | |
1da177e4 | 238 | |
64bc3979 AC |
239 | static int serial_open(struct tty_struct *tty, struct file *filp) |
240 | { | |
241 | struct usb_serial_port *port = tty->driver_data; | |
320348c8 | 242 | |
d12e211d JH |
243 | dev_dbg(tty->dev, "%s\n", __func__); |
244 | ||
64bc3979 | 245 | return tty_port_open(&port->port, tty, filp); |
1da177e4 LT |
246 | } |
247 | ||
335f8514 | 248 | /** |
395e08da | 249 | * serial_port_shutdown - shut down hardware |
e1108a63 | 250 | * @tport: tty port to shut down |
335f8514 | 251 | * |
8a7298d3 PH |
252 | * Shut down a USB serial port. Serialized against activate by the |
253 | * tport mutex and kept to matching open/close pairs | |
d41861ca | 254 | * of calls by the initialized flag. |
8a7298d3 PH |
255 | * |
256 | * Not called if tty is console. | |
335f8514 | 257 | */ |
395e08da | 258 | static void serial_port_shutdown(struct tty_port *tport) |
1da177e4 | 259 | { |
e1108a63 AC |
260 | struct usb_serial_port *port = |
261 | container_of(tport, struct usb_serial_port, port); | |
335f8514 | 262 | struct usb_serial_driver *drv = port->serial->type; |
8a7298d3 | 263 | |
335f8514 AC |
264 | if (drv->close) |
265 | drv->close(port); | |
335f8514 AC |
266 | } |
267 | ||
f5b0953a AS |
268 | static void serial_hangup(struct tty_struct *tty) |
269 | { | |
270 | struct usb_serial_port *port = tty->driver_data; | |
92931d24 | 271 | |
d12e211d JH |
272 | dev_dbg(tty->dev, "%s\n", __func__); |
273 | ||
f5b0953a | 274 | tty_port_hangup(&port->port); |
f5b0953a AS |
275 | } |
276 | ||
277 | static void serial_close(struct tty_struct *tty, struct file *filp) | |
278 | { | |
279 | struct usb_serial_port *port = tty->driver_data; | |
92931d24 | 280 | |
d12e211d JH |
281 | dev_dbg(tty->dev, "%s\n", __func__); |
282 | ||
e1108a63 | 283 | tty_port_close(&port->port, tty, filp); |
f5b0953a AS |
284 | } |
285 | ||
335f8514 | 286 | /** |
f278a2f7 | 287 | * serial_cleanup - free resources post close/hangup |
f5b0953a | 288 | * @port: port to free up |
335f8514 | 289 | * |
f5b0953a AS |
290 | * Do the resource freeing and refcount dropping for the port. |
291 | * Avoid freeing the console. | |
4455e344 | 292 | * |
36b3c070 | 293 | * Called asynchronously after the last tty kref is dropped. |
335f8514 | 294 | */ |
f278a2f7 | 295 | static void serial_cleanup(struct tty_struct *tty) |
335f8514 | 296 | { |
4455e344 | 297 | struct usb_serial_port *port = tty->driver_data; |
335f8514 AC |
298 | struct usb_serial *serial; |
299 | struct module *owner; | |
300 | ||
d12e211d JH |
301 | dev_dbg(tty->dev, "%s\n", __func__); |
302 | ||
f5b0953a AS |
303 | /* The console is magical. Do not hang up the console hardware |
304 | * or there will be tears. | |
305 | */ | |
bd5afa9e | 306 | if (port->port.console) |
335f8514 AC |
307 | return; |
308 | ||
cc56cd01 AS |
309 | tty->driver_data = NULL; |
310 | ||
335f8514 AC |
311 | serial = port->serial; |
312 | owner = serial->type->driver.owner; | |
41bd34dd | 313 | |
69ca674e | 314 | usb_autopm_put_interface(serial->interface); |
41bd34dd | 315 | |
2d93148a | 316 | usb_serial_put(serial); |
335f8514 AC |
317 | module_put(owner); |
318 | } | |
319 | ||
a8d6f0a9 AC |
320 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
321 | int count) | |
1da177e4 | 322 | { |
81671ddb | 323 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 324 | int retval = -ENODEV; |
1da177e4 | 325 | |
f34d7a5b | 326 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
327 | goto exit; |
328 | ||
d12e211d | 329 | dev_dbg(tty->dev, "%s - %d byte(s)\n", __func__, count); |
1da177e4 | 330 | |
95da310e | 331 | retval = port->serial->type->write(tty, port, buf, count); |
c6249ff7 JH |
332 | if (retval < 0) |
333 | retval = usb_translate_errors(retval); | |
1da177e4 LT |
334 | exit: |
335 | return retval; | |
336 | } | |
337 | ||
a8d6f0a9 | 338 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 339 | { |
81671ddb | 340 | struct usb_serial_port *port = tty->driver_data; |
92931d24 | 341 | |
d12e211d | 342 | dev_dbg(tty->dev, "%s\n", __func__); |
9993b42b | 343 | |
95da310e | 344 | return port->serial->type->write_room(tty); |
1da177e4 LT |
345 | } |
346 | ||
a8d6f0a9 | 347 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 348 | { |
81671ddb | 349 | struct usb_serial_port *port = tty->driver_data; |
810360a0 | 350 | struct usb_serial *serial = port->serial; |
92931d24 | 351 | |
d12e211d | 352 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 353 | |
810360a0 | 354 | if (serial->disconnected) |
4746b6c6 | 355 | return 0; |
810360a0 | 356 | |
4746b6c6 | 357 | return serial->type->chars_in_buffer(tty); |
1da177e4 LT |
358 | } |
359 | ||
0693196f JH |
360 | static void serial_wait_until_sent(struct tty_struct *tty, int timeout) |
361 | { | |
362 | struct usb_serial_port *port = tty->driver_data; | |
363 | struct usb_serial *serial = port->serial; | |
364 | ||
365 | dev_dbg(tty->dev, "%s\n", __func__); | |
366 | ||
367 | if (!port->serial->type->wait_until_sent) | |
368 | return; | |
369 | ||
370 | mutex_lock(&serial->disc_mutex); | |
371 | if (!serial->disconnected) | |
372 | port->serial->type->wait_until_sent(tty, timeout); | |
373 | mutex_unlock(&serial->disc_mutex); | |
374 | } | |
375 | ||
a8d6f0a9 | 376 | static void serial_throttle(struct tty_struct *tty) |
1da177e4 | 377 | { |
81671ddb | 378 | struct usb_serial_port *port = tty->driver_data; |
92931d24 | 379 | |
d12e211d | 380 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 381 | |
1da177e4 | 382 | if (port->serial->type->throttle) |
95da310e | 383 | port->serial->type->throttle(tty); |
1da177e4 LT |
384 | } |
385 | ||
a8d6f0a9 | 386 | static void serial_unthrottle(struct tty_struct *tty) |
1da177e4 | 387 | { |
81671ddb | 388 | struct usb_serial_port *port = tty->driver_data; |
92931d24 | 389 | |
d12e211d | 390 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 391 | |
1da177e4 | 392 | if (port->serial->type->unthrottle) |
95da310e | 393 | port->serial->type->unthrottle(tty); |
1da177e4 LT |
394 | } |
395 | ||
6caa76b7 | 396 | static int serial_ioctl(struct tty_struct *tty, |
a8d6f0a9 | 397 | unsigned int cmd, unsigned long arg) |
1da177e4 | 398 | { |
81671ddb | 399 | struct usb_serial_port *port = tty->driver_data; |
f4488035 | 400 | int retval = -ENOIOCTLCMD; |
1da177e4 | 401 | |
4d5147ec | 402 | dev_dbg(tty->dev, "%s - cmd 0x%04x\n", __func__, cmd); |
1da177e4 | 403 | |
143d9d96 JH |
404 | switch (cmd) { |
405 | case TIOCMIWAIT: | |
406 | if (port->serial->type->tiocmiwait) | |
407 | retval = port->serial->type->tiocmiwait(tty, arg); | |
408 | break; | |
409 | default: | |
410 | if (port->serial->type->ioctl) | |
411 | retval = port->serial->type->ioctl(tty, cmd, arg); | |
143d9d96 | 412 | } |
1da177e4 | 413 | |
1da177e4 LT |
414 | return retval; |
415 | } | |
416 | ||
a8d6f0a9 | 417 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 418 | { |
81671ddb | 419 | struct usb_serial_port *port = tty->driver_data; |
92931d24 | 420 | |
d12e211d | 421 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 422 | |
1da177e4 | 423 | if (port->serial->type->set_termios) |
95da310e | 424 | port->serial->type->set_termios(tty, port, old); |
33785091 | 425 | else |
adc8d746 | 426 | tty_termios_copy_hw(&tty->termios, old); |
1da177e4 LT |
427 | } |
428 | ||
9e98966c | 429 | static int serial_break(struct tty_struct *tty, int break_state) |
1da177e4 | 430 | { |
81671ddb | 431 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 432 | |
d12e211d | 433 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 434 | |
6b447f04 | 435 | if (port->serial->type->break_ctl) |
95da310e | 436 | port->serial->type->break_ctl(tty, break_state); |
9993b42b | 437 | |
9e98966c | 438 | return 0; |
1da177e4 LT |
439 | } |
440 | ||
6fd69d3c | 441 | static int serial_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
442 | { |
443 | struct usb_serial *serial; | |
e5b1e206 | 444 | struct usb_serial_port *port; |
1da177e4 | 445 | int i; |
1da177e4 LT |
446 | char tmp[40]; |
447 | ||
6fd69d3c | 448 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
455b4f7e | 449 | for (i = 0; i < USB_SERIAL_TTY_MINORS; ++i) { |
e5b1e206 GKH |
450 | port = usb_serial_port_get_by_minor(i); |
451 | if (port == NULL) | |
1da177e4 | 452 | continue; |
e5b1e206 | 453 | serial = port->serial; |
1da177e4 | 454 | |
6fd69d3c | 455 | seq_printf(m, "%d:", i); |
18fcac35 | 456 | if (serial->type->driver.owner) |
6fd69d3c | 457 | seq_printf(m, " module:%s", |
a8d6f0a9 | 458 | module_name(serial->type->driver.owner)); |
6fd69d3c | 459 | seq_printf(m, " name:\"%s\"", |
a8d6f0a9 | 460 | serial->type->description); |
6fd69d3c | 461 | seq_printf(m, " vendor:%04x product:%04x", |
a8d6f0a9 AC |
462 | le16_to_cpu(serial->dev->descriptor.idVendor), |
463 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
6fd69d3c | 464 | seq_printf(m, " num_ports:%d", serial->num_ports); |
e5b1e206 | 465 | seq_printf(m, " port:%d", port->port_number); |
1da177e4 | 466 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
6fd69d3c | 467 | seq_printf(m, " path:%s", tmp); |
a8d6f0a9 | 468 | |
6fd69d3c | 469 | seq_putc(m, '\n'); |
73e487fd | 470 | usb_serial_put(serial); |
8bc2c1b2 | 471 | mutex_unlock(&serial->disc_mutex); |
1da177e4 | 472 | } |
6fd69d3c | 473 | return 0; |
1da177e4 LT |
474 | } |
475 | ||
6fd69d3c AD |
476 | static int serial_proc_open(struct inode *inode, struct file *file) |
477 | { | |
478 | return single_open(file, serial_proc_show, NULL); | |
479 | } | |
480 | ||
481 | static const struct file_operations serial_proc_fops = { | |
482 | .owner = THIS_MODULE, | |
483 | .open = serial_proc_open, | |
484 | .read = seq_read, | |
485 | .llseek = seq_lseek, | |
486 | .release = single_release, | |
487 | }; | |
488 | ||
60b33c13 | 489 | static int serial_tiocmget(struct tty_struct *tty) |
1da177e4 | 490 | { |
81671ddb | 491 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 492 | |
d12e211d | 493 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 494 | |
1da177e4 | 495 | if (port->serial->type->tiocmget) |
60b33c13 | 496 | return port->serial->type->tiocmget(tty); |
1da177e4 LT |
497 | return -EINVAL; |
498 | } | |
499 | ||
20b9d177 | 500 | static int serial_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
501 | unsigned int set, unsigned int clear) |
502 | { | |
81671ddb | 503 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 504 | |
d12e211d | 505 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 506 | |
1da177e4 | 507 | if (port->serial->type->tiocmset) |
20b9d177 | 508 | return port->serial->type->tiocmset(tty, set, clear); |
1da177e4 LT |
509 | return -EINVAL; |
510 | } | |
511 | ||
d281da7f AC |
512 | static int serial_get_icount(struct tty_struct *tty, |
513 | struct serial_icounter_struct *icount) | |
514 | { | |
515 | struct usb_serial_port *port = tty->driver_data; | |
516 | ||
d12e211d | 517 | dev_dbg(tty->dev, "%s\n", __func__); |
d281da7f AC |
518 | |
519 | if (port->serial->type->get_icount) | |
520 | return port->serial->type->get_icount(tty, icount); | |
521 | return -EINVAL; | |
522 | } | |
523 | ||
cf2c7481 PZ |
524 | /* |
525 | * We would be calling tty_wakeup here, but unfortunately some line | |
526 | * disciplines have an annoying habit of calling tty->write from | |
527 | * the write wakeup callback (e.g. n_hdlc.c). | |
528 | */ | |
529 | void usb_serial_port_softint(struct usb_serial_port *port) | |
530 | { | |
531 | schedule_work(&port->work); | |
532 | } | |
a8d6f0a9 | 533 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
cf2c7481 | 534 | |
c4028958 | 535 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 536 | { |
c4028958 DH |
537 | struct usb_serial_port *port = |
538 | container_of(work, struct usb_serial_port, work); | |
1da177e4 | 539 | |
6aad04f2 | 540 | tty_port_tty_wakeup(&port->port); |
1da177e4 LT |
541 | } |
542 | ||
6a5c821c | 543 | static void usb_serial_port_poison_urbs(struct usb_serial_port *port) |
34f8e761 | 544 | { |
27c7acf2 JH |
545 | int i; |
546 | ||
d83b4053 | 547 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
6a5c821c | 548 | usb_poison_urb(port->read_urbs[i]); |
27c7acf2 | 549 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
6a5c821c JH |
550 | usb_poison_urb(port->write_urbs[i]); |
551 | ||
552 | usb_poison_urb(port->interrupt_in_urb); | |
553 | usb_poison_urb(port->interrupt_out_urb); | |
554 | } | |
555 | ||
556 | static void usb_serial_port_unpoison_urbs(struct usb_serial_port *port) | |
557 | { | |
558 | int i; | |
559 | ||
560 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) | |
561 | usb_unpoison_urb(port->read_urbs[i]); | |
562 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) | |
563 | usb_unpoison_urb(port->write_urbs[i]); | |
564 | ||
565 | usb_unpoison_urb(port->interrupt_in_urb); | |
566 | usb_unpoison_urb(port->interrupt_out_urb); | |
34ef50e5 ON |
567 | } |
568 | ||
69a3d212 | 569 | static void usb_serial_port_release(struct device *dev) |
34ef50e5 | 570 | { |
41bd34dd | 571 | struct usb_serial_port *port = to_usb_serial_port(dev); |
27c7acf2 | 572 | int i; |
41bd34dd | 573 | |
92931d24 | 574 | dev_dbg(dev, "%s\n", __func__); |
41bd34dd | 575 | |
34ef50e5 | 576 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 | 577 | usb_free_urb(port->interrupt_out_urb); |
d83b4053 JH |
578 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
579 | usb_free_urb(port->read_urbs[i]); | |
580 | kfree(port->bulk_in_buffers[i]); | |
581 | } | |
27c7acf2 JH |
582 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) { |
583 | usb_free_urb(port->write_urbs[i]); | |
584 | kfree(port->bulk_out_buffers[i]); | |
585 | } | |
119eecc8 | 586 | kfifo_free(&port->write_fifo); |
1da177e4 LT |
587 | kfree(port->interrupt_in_buffer); |
588 | kfree(port->interrupt_out_buffer); | |
191c5f10 | 589 | tty_port_destroy(&port->port); |
1da177e4 LT |
590 | kfree(port); |
591 | } | |
592 | ||
a8d6f0a9 AC |
593 | static struct usb_serial *create_serial(struct usb_device *dev, |
594 | struct usb_interface *interface, | |
595 | struct usb_serial_driver *driver) | |
1da177e4 LT |
596 | { |
597 | struct usb_serial *serial; | |
598 | ||
80b6ca48 | 599 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
6b03f7f7 | 600 | if (!serial) |
1da177e4 | 601 | return NULL; |
1da177e4 | 602 | serial->dev = usb_get_dev(dev); |
ea65370d | 603 | serial->type = driver; |
d7971051 | 604 | serial->interface = usb_get_intf(interface); |
1da177e4 | 605 | kref_init(&serial->kref); |
a1cd7e99 | 606 | mutex_init(&serial->disc_mutex); |
e5b1e206 | 607 | serial->minors_reserved = 0; |
1da177e4 LT |
608 | |
609 | return serial; | |
610 | } | |
611 | ||
93bacefc | 612 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 613 | struct usb_serial_driver *drv) |
93bacefc GKH |
614 | { |
615 | struct usb_dynid *dynid; | |
616 | ||
617 | spin_lock(&drv->dynids.lock); | |
618 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
619 | if (usb_match_one_id(intf, &dynid->id)) { | |
620 | spin_unlock(&drv->dynids.lock); | |
621 | return &dynid->id; | |
622 | } | |
623 | } | |
624 | spin_unlock(&drv->dynids.lock); | |
625 | return NULL; | |
626 | } | |
627 | ||
628 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
629 | struct usb_interface *intf) | |
630 | { | |
631 | const struct usb_device_id *id; | |
632 | ||
633 | id = usb_match_id(intf, drv->id_table); | |
634 | if (id) { | |
92931d24 | 635 | dev_dbg(&intf->dev, "static descriptor matches\n"); |
93bacefc GKH |
636 | goto exit; |
637 | } | |
638 | id = match_dynamic_id(intf, drv); | |
639 | if (id) | |
92931d24 | 640 | dev_dbg(&intf->dev, "dynamic descriptor matches\n"); |
93bacefc GKH |
641 | exit: |
642 | return id; | |
643 | } | |
644 | ||
0daeed38 | 645 | /* Caller must hold table_lock */ |
a8d6f0a9 AC |
646 | static struct usb_serial_driver *search_serial_device( |
647 | struct usb_interface *iface) | |
1da177e4 | 648 | { |
954c3f8a | 649 | const struct usb_device_id *id = NULL; |
063a2da8 | 650 | struct usb_serial_driver *drv; |
954c3f8a | 651 | struct usb_driver *driver = to_usb_driver(iface->dev.driver); |
1da177e4 | 652 | |
93b1fae4 | 653 | /* Check if the usb id matches a known device */ |
063a2da8 | 654 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
954c3f8a BM |
655 | if (drv->usb_driver == driver) |
656 | id = get_iface_id(drv, iface); | |
93bacefc | 657 | if (id) |
063a2da8 | 658 | return drv; |
1da177e4 LT |
659 | } |
660 | ||
661 | return NULL; | |
662 | } | |
663 | ||
395e08da | 664 | static int serial_port_carrier_raised(struct tty_port *port) |
335f8514 AC |
665 | { |
666 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
667 | struct usb_serial_driver *drv = p->serial->type; | |
3e1f4901 | 668 | |
335f8514 AC |
669 | if (drv->carrier_raised) |
670 | return drv->carrier_raised(p); | |
671 | /* No carrier control - don't block */ | |
3e1f4901 | 672 | return 1; |
335f8514 AC |
673 | } |
674 | ||
395e08da | 675 | static void serial_port_dtr_rts(struct tty_port *port, int on) |
335f8514 AC |
676 | { |
677 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
f5f45304 | 678 | struct usb_serial_driver *drv = p->serial->type; |
3e1f4901 | 679 | |
f5f45304 | 680 | if (drv->dtr_rts) |
335f8514 AC |
681 | drv->dtr_rts(p, on); |
682 | } | |
683 | ||
2deb96b5 JH |
684 | static ssize_t port_number_show(struct device *dev, |
685 | struct device_attribute *attr, char *buf) | |
686 | { | |
687 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
688 | ||
689 | return sprintf(buf, "%u\n", port->port_number); | |
690 | } | |
691 | static DEVICE_ATTR_RO(port_number); | |
692 | ||
693 | static struct attribute *usb_serial_port_attrs[] = { | |
694 | &dev_attr_port_number.attr, | |
695 | NULL | |
696 | }; | |
697 | ATTRIBUTE_GROUPS(usb_serial_port); | |
698 | ||
335f8514 | 699 | static const struct tty_port_operations serial_port_ops = { |
395e08da JH |
700 | .carrier_raised = serial_port_carrier_raised, |
701 | .dtr_rts = serial_port_dtr_rts, | |
702 | .activate = serial_port_activate, | |
703 | .shutdown = serial_port_shutdown, | |
335f8514 AC |
704 | }; |
705 | ||
1546e6ae JH |
706 | static void find_endpoints(struct usb_serial *serial, |
707 | struct usb_serial_endpoints *epds) | |
708 | { | |
709 | struct device *dev = &serial->interface->dev; | |
710 | struct usb_host_interface *iface_desc; | |
711 | struct usb_endpoint_descriptor *epd; | |
712 | unsigned int i; | |
713 | ||
8520ac0d JH |
714 | BUILD_BUG_ON(ARRAY_SIZE(epds->bulk_in) < USB_MAXENDPOINTS / 2); |
715 | BUILD_BUG_ON(ARRAY_SIZE(epds->bulk_out) < USB_MAXENDPOINTS / 2); | |
716 | BUILD_BUG_ON(ARRAY_SIZE(epds->interrupt_in) < USB_MAXENDPOINTS / 2); | |
717 | BUILD_BUG_ON(ARRAY_SIZE(epds->interrupt_out) < USB_MAXENDPOINTS / 2); | |
718 | ||
1546e6ae JH |
719 | iface_desc = serial->interface->cur_altsetting; |
720 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
721 | epd = &iface_desc->endpoint[i].desc; | |
722 | ||
723 | if (usb_endpoint_is_bulk_in(epd)) { | |
724 | dev_dbg(dev, "found bulk in on endpoint %u\n", i); | |
1546e6ae JH |
725 | epds->bulk_in[epds->num_bulk_in++] = epd; |
726 | } else if (usb_endpoint_is_bulk_out(epd)) { | |
727 | dev_dbg(dev, "found bulk out on endpoint %u\n", i); | |
1546e6ae JH |
728 | epds->bulk_out[epds->num_bulk_out++] = epd; |
729 | } else if (usb_endpoint_is_int_in(epd)) { | |
730 | dev_dbg(dev, "found interrupt in on endpoint %u\n", i); | |
1546e6ae JH |
731 | epds->interrupt_in[epds->num_interrupt_in++] = epd; |
732 | } else if (usb_endpoint_is_int_out(epd)) { | |
733 | dev_dbg(dev, "found interrupt out on endpoint %u\n", i); | |
1546e6ae JH |
734 | epds->interrupt_out[epds->num_interrupt_out++] = epd; |
735 | } | |
736 | } | |
737 | } | |
738 | ||
45e5d4d4 JH |
739 | static int setup_port_bulk_in(struct usb_serial_port *port, |
740 | struct usb_endpoint_descriptor *epd) | |
741 | { | |
742 | struct usb_serial_driver *type = port->serial->type; | |
743 | struct usb_device *udev = port->serial->dev; | |
744 | int buffer_size; | |
745 | int i; | |
746 | ||
747 | buffer_size = max_t(int, type->bulk_in_size, usb_endpoint_maxp(epd)); | |
748 | port->bulk_in_size = buffer_size; | |
749 | port->bulk_in_endpointAddress = epd->bEndpointAddress; | |
750 | ||
751 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { | |
752 | set_bit(i, &port->read_urbs_free); | |
753 | port->read_urbs[i] = usb_alloc_urb(0, GFP_KERNEL); | |
754 | if (!port->read_urbs[i]) | |
755 | return -ENOMEM; | |
756 | port->bulk_in_buffers[i] = kmalloc(buffer_size, GFP_KERNEL); | |
757 | if (!port->bulk_in_buffers[i]) | |
758 | return -ENOMEM; | |
759 | usb_fill_bulk_urb(port->read_urbs[i], udev, | |
760 | usb_rcvbulkpipe(udev, epd->bEndpointAddress), | |
761 | port->bulk_in_buffers[i], buffer_size, | |
762 | type->read_bulk_callback, port); | |
763 | } | |
764 | ||
765 | port->read_urb = port->read_urbs[0]; | |
766 | port->bulk_in_buffer = port->bulk_in_buffers[0]; | |
767 | ||
768 | return 0; | |
769 | } | |
770 | ||
771 | static int setup_port_bulk_out(struct usb_serial_port *port, | |
772 | struct usb_endpoint_descriptor *epd) | |
773 | { | |
774 | struct usb_serial_driver *type = port->serial->type; | |
775 | struct usb_device *udev = port->serial->dev; | |
776 | int buffer_size; | |
777 | int i; | |
778 | ||
779 | if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL)) | |
780 | return -ENOMEM; | |
781 | if (type->bulk_out_size) | |
782 | buffer_size = type->bulk_out_size; | |
783 | else | |
784 | buffer_size = usb_endpoint_maxp(epd); | |
785 | port->bulk_out_size = buffer_size; | |
786 | port->bulk_out_endpointAddress = epd->bEndpointAddress; | |
787 | ||
788 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) { | |
789 | set_bit(i, &port->write_urbs_free); | |
790 | port->write_urbs[i] = usb_alloc_urb(0, GFP_KERNEL); | |
791 | if (!port->write_urbs[i]) | |
792 | return -ENOMEM; | |
793 | port->bulk_out_buffers[i] = kmalloc(buffer_size, GFP_KERNEL); | |
794 | if (!port->bulk_out_buffers[i]) | |
795 | return -ENOMEM; | |
796 | usb_fill_bulk_urb(port->write_urbs[i], udev, | |
797 | usb_sndbulkpipe(udev, epd->bEndpointAddress), | |
798 | port->bulk_out_buffers[i], buffer_size, | |
799 | type->write_bulk_callback, port); | |
800 | } | |
801 | ||
802 | port->write_urb = port->write_urbs[0]; | |
803 | port->bulk_out_buffer = port->bulk_out_buffers[0]; | |
804 | ||
805 | return 0; | |
806 | } | |
807 | ||
808 | static int setup_port_interrupt_in(struct usb_serial_port *port, | |
809 | struct usb_endpoint_descriptor *epd) | |
810 | { | |
811 | struct usb_serial_driver *type = port->serial->type; | |
812 | struct usb_device *udev = port->serial->dev; | |
813 | int buffer_size; | |
814 | ||
815 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
816 | if (!port->interrupt_in_urb) | |
817 | return -ENOMEM; | |
818 | buffer_size = usb_endpoint_maxp(epd); | |
819 | port->interrupt_in_endpointAddress = epd->bEndpointAddress; | |
820 | port->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL); | |
821 | if (!port->interrupt_in_buffer) | |
822 | return -ENOMEM; | |
823 | usb_fill_int_urb(port->interrupt_in_urb, udev, | |
824 | usb_rcvintpipe(udev, epd->bEndpointAddress), | |
825 | port->interrupt_in_buffer, buffer_size, | |
826 | type->read_int_callback, port, | |
827 | epd->bInterval); | |
828 | ||
829 | return 0; | |
830 | } | |
831 | ||
832 | static int setup_port_interrupt_out(struct usb_serial_port *port, | |
833 | struct usb_endpoint_descriptor *epd) | |
834 | { | |
835 | struct usb_serial_driver *type = port->serial->type; | |
836 | struct usb_device *udev = port->serial->dev; | |
837 | int buffer_size; | |
838 | ||
839 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
840 | if (!port->interrupt_out_urb) | |
841 | return -ENOMEM; | |
842 | buffer_size = usb_endpoint_maxp(epd); | |
843 | port->interrupt_out_size = buffer_size; | |
844 | port->interrupt_out_endpointAddress = epd->bEndpointAddress; | |
845 | port->interrupt_out_buffer = kmalloc(buffer_size, GFP_KERNEL); | |
846 | if (!port->interrupt_out_buffer) | |
847 | return -ENOMEM; | |
848 | usb_fill_int_urb(port->interrupt_out_urb, udev, | |
849 | usb_sndintpipe(udev, epd->bEndpointAddress), | |
850 | port->interrupt_out_buffer, buffer_size, | |
851 | type->write_int_callback, port, | |
852 | epd->bInterval); | |
853 | ||
854 | return 0; | |
855 | } | |
856 | ||
2edd284b | 857 | static int usb_serial_probe(struct usb_interface *interface, |
1da177e4 LT |
858 | const struct usb_device_id *id) |
859 | { | |
92931d24 | 860 | struct device *ddev = &interface->dev; |
a8d6f0a9 | 861 | struct usb_device *dev = interface_to_usbdev(interface); |
1da177e4 LT |
862 | struct usb_serial *serial = NULL; |
863 | struct usb_serial_port *port; | |
1546e6ae | 864 | struct usb_serial_endpoints *epds; |
ea65370d | 865 | struct usb_serial_driver *type = NULL; |
1da177e4 | 866 | int retval; |
1da177e4 | 867 | int i; |
1da177e4 | 868 | int num_ports = 0; |
ef88f33f | 869 | unsigned char max_endpoints; |
1da177e4 | 870 | |
0daeed38 | 871 | mutex_lock(&table_lock); |
1da177e4 LT |
872 | type = search_serial_device(interface); |
873 | if (!type) { | |
0daeed38 | 874 | mutex_unlock(&table_lock); |
92931d24 | 875 | dev_dbg(ddev, "none matched\n"); |
1da177e4 LT |
876 | return -ENODEV; |
877 | } | |
878 | ||
0daeed38 AK |
879 | if (!try_module_get(type->driver.owner)) { |
880 | mutex_unlock(&table_lock); | |
92931d24 | 881 | dev_err(ddev, "module get failed, exiting\n"); |
0daeed38 AK |
882 | return -EIO; |
883 | } | |
884 | mutex_unlock(&table_lock); | |
885 | ||
a8d6f0a9 | 886 | serial = create_serial(dev, interface, type); |
1da177e4 | 887 | if (!serial) { |
c2fef456 JH |
888 | retval = -ENOMEM; |
889 | goto err_put_module; | |
1da177e4 LT |
890 | } |
891 | ||
892 | /* if this device type has a probe function, call it */ | |
893 | if (type->probe) { | |
894 | const struct usb_device_id *id; | |
895 | ||
93bacefc | 896 | id = get_iface_id(type, interface); |
1da177e4 | 897 | retval = type->probe(serial, id); |
1da177e4 LT |
898 | |
899 | if (retval) { | |
92931d24 | 900 | dev_dbg(ddev, "sub driver rejected device\n"); |
c2fef456 | 901 | goto err_put_serial; |
1da177e4 LT |
902 | } |
903 | } | |
904 | ||
905 | /* descriptor matches, let's find the endpoints needed */ | |
1546e6ae JH |
906 | epds = kzalloc(sizeof(*epds), GFP_KERNEL); |
907 | if (!epds) { | |
908 | retval = -ENOMEM; | |
909 | goto err_put_serial; | |
1da177e4 LT |
910 | } |
911 | ||
1546e6ae JH |
912 | find_endpoints(serial, epds); |
913 | ||
92e6b2c6 JH |
914 | if (epds->num_bulk_in < type->num_bulk_in || |
915 | epds->num_bulk_out < type->num_bulk_out || | |
916 | epds->num_interrupt_in < type->num_interrupt_in || | |
917 | epds->num_interrupt_out < type->num_interrupt_out) { | |
918 | dev_err(ddev, "required endpoints missing\n"); | |
919 | retval = -ENODEV; | |
920 | goto err_free_epds; | |
921 | } | |
a794499b JH |
922 | |
923 | if (type->calc_num_ports) { | |
924 | retval = type->calc_num_ports(serial, epds); | |
925 | if (retval < 0) | |
92e6b2c6 | 926 | goto err_free_epds; |
a794499b | 927 | num_ports = retval; |
1da177e4 LT |
928 | } |
929 | ||
a794499b JH |
930 | if (!num_ports) |
931 | num_ports = type->num_ports; | |
932 | ||
5654699f JH |
933 | if (num_ports > MAX_NUM_PORTS) { |
934 | dev_warn(ddev, "too many ports requested: %d\n", num_ports); | |
935 | num_ports = MAX_NUM_PORTS; | |
936 | } | |
937 | ||
ef88f33f | 938 | serial->num_ports = (unsigned char)num_ports; |
1546e6ae JH |
939 | serial->num_bulk_in = epds->num_bulk_in; |
940 | serial->num_bulk_out = epds->num_bulk_out; | |
941 | serial->num_interrupt_in = epds->num_interrupt_in; | |
942 | serial->num_interrupt_out = epds->num_interrupt_out; | |
1da177e4 | 943 | |
063a2da8 | 944 | /* found all that we need */ |
92931d24 | 945 | dev_info(ddev, "%s converter detected\n", type->description); |
063a2da8 | 946 | |
1da177e4 | 947 | /* create our ports, we need as many as the max endpoints */ |
a8d6f0a9 AC |
948 | /* we don't use num_ports here because some devices have more |
949 | endpoint pairs than ports */ | |
1546e6ae JH |
950 | max_endpoints = max(epds->num_bulk_in, epds->num_bulk_out); |
951 | max_endpoints = max(max_endpoints, epds->num_interrupt_in); | |
952 | max_endpoints = max(max_endpoints, epds->num_interrupt_out); | |
ef88f33f | 953 | max_endpoints = max(max_endpoints, serial->num_ports); |
1da177e4 | 954 | serial->num_port_pointers = max_endpoints; |
4b10f0f3 | 955 | |
d9a38a87 | 956 | dev_dbg(ddev, "setting up %d port structure(s)\n", max_endpoints); |
1da177e4 | 957 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 958 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
c22ac6d2 JH |
959 | if (!port) { |
960 | retval = -ENOMEM; | |
961 | goto err_free_epds; | |
962 | } | |
4a90f09b | 963 | tty_port_init(&port->port); |
335f8514 | 964 | port->port.ops = &serial_port_ops; |
1da177e4 | 965 | port->serial = serial; |
507ca9bc | 966 | spin_lock_init(&port->lock); |
e1108a63 AC |
967 | /* Keep this for private driver use for the moment but |
968 | should probably go away */ | |
c4028958 | 969 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 | 970 | serial->port[i] = port; |
41bd34dd AS |
971 | port->dev.parent = &interface->dev; |
972 | port->dev.driver = NULL; | |
973 | port->dev.bus = &usb_serial_bus_type; | |
69a3d212 | 974 | port->dev.release = &usb_serial_port_release; |
2deb96b5 | 975 | port->dev.groups = usb_serial_port_groups; |
41bd34dd | 976 | device_initialize(&port->dev); |
1da177e4 LT |
977 | } |
978 | ||
979 | /* set up the endpoint information */ | |
1546e6ae | 980 | for (i = 0; i < epds->num_bulk_in; ++i) { |
45e5d4d4 JH |
981 | retval = setup_port_bulk_in(serial->port[i], epds->bulk_in[i]); |
982 | if (retval) | |
c22ac6d2 | 983 | goto err_free_epds; |
1da177e4 LT |
984 | } |
985 | ||
1546e6ae | 986 | for (i = 0; i < epds->num_bulk_out; ++i) { |
45e5d4d4 JH |
987 | retval = setup_port_bulk_out(serial->port[i], |
988 | epds->bulk_out[i]); | |
989 | if (retval) | |
c22ac6d2 | 990 | goto err_free_epds; |
1da177e4 LT |
991 | } |
992 | ||
993 | if (serial->type->read_int_callback) { | |
1546e6ae | 994 | for (i = 0; i < epds->num_interrupt_in; ++i) { |
45e5d4d4 JH |
995 | retval = setup_port_interrupt_in(serial->port[i], |
996 | epds->interrupt_in[i]); | |
997 | if (retval) | |
c22ac6d2 | 998 | goto err_free_epds; |
1da177e4 | 999 | } |
1546e6ae | 1000 | } else if (epds->num_interrupt_in) { |
92931d24 | 1001 | dev_dbg(ddev, "The device claims to support interrupt in transfers, but read_int_callback is not defined\n"); |
1da177e4 | 1002 | } |
a8d6f0a9 | 1003 | |
1da177e4 | 1004 | if (serial->type->write_int_callback) { |
1546e6ae | 1005 | for (i = 0; i < epds->num_interrupt_out; ++i) { |
45e5d4d4 JH |
1006 | retval = setup_port_interrupt_out(serial->port[i], |
1007 | epds->interrupt_out[i]); | |
1008 | if (retval) | |
c22ac6d2 | 1009 | goto err_free_epds; |
1da177e4 | 1010 | } |
1546e6ae | 1011 | } else if (epds->num_interrupt_out) { |
92931d24 | 1012 | dev_dbg(ddev, "The device claims to support interrupt out transfers, but write_int_callback is not defined\n"); |
1da177e4 | 1013 | } |
a8d6f0a9 | 1014 | |
bdce6612 JH |
1015 | usb_set_intfdata(interface, serial); |
1016 | ||
1da177e4 LT |
1017 | /* if this device type has an attach function, call it */ |
1018 | if (type->attach) { | |
a8d6f0a9 | 1019 | retval = type->attach(serial); |
1da177e4 | 1020 | if (retval < 0) |
c22ac6d2 | 1021 | goto err_free_epds; |
a4720c65 | 1022 | serial->attached = 1; |
1da177e4 | 1023 | if (retval > 0) { |
a8d6f0a9 AC |
1024 | /* quietly accept this device, but don't bind to a |
1025 | serial port as it's about to disappear */ | |
0a3c8549 | 1026 | serial->num_ports = 0; |
1da177e4 LT |
1027 | goto exit; |
1028 | } | |
a4720c65 AS |
1029 | } else { |
1030 | serial->attached = 1; | |
1da177e4 LT |
1031 | } |
1032 | ||
c22ac6d2 JH |
1033 | retval = allocate_minors(serial, num_ports); |
1034 | if (retval) { | |
e5b1e206 | 1035 | dev_err(ddev, "No more free serial minor numbers\n"); |
c22ac6d2 | 1036 | goto err_free_epds; |
34ef50e5 ON |
1037 | } |
1038 | ||
1da177e4 LT |
1039 | /* register all of the individual ports with the driver core */ |
1040 | for (i = 0; i < num_ports; ++i) { | |
1041 | port = serial->port[i]; | |
1143832e | 1042 | dev_set_name(&port->dev, "ttyUSB%d", port->minor); |
d9a38a87 | 1043 | dev_dbg(ddev, "registering %s\n", dev_name(&port->dev)); |
a7a6b79b ML |
1044 | device_enable_async_suspend(&port->dev); |
1045 | ||
41bd34dd | 1046 | retval = device_add(&port->dev); |
891a3b1f | 1047 | if (retval) |
92931d24 | 1048 | dev_err(ddev, "Error registering port device, continuing\n"); |
1da177e4 LT |
1049 | } |
1050 | ||
126d26f6 JH |
1051 | if (num_ports > 0) |
1052 | usb_serial_console_init(serial->port[0]->minor); | |
1da177e4 | 1053 | exit: |
1546e6ae | 1054 | kfree(epds); |
d92a3ca6 | 1055 | module_put(type->driver.owner); |
1da177e4 LT |
1056 | return 0; |
1057 | ||
92e6b2c6 JH |
1058 | err_free_epds: |
1059 | kfree(epds); | |
c2fef456 | 1060 | err_put_serial: |
41bd34dd | 1061 | usb_serial_put(serial); |
c2fef456 | 1062 | err_put_module: |
d92a3ca6 | 1063 | module_put(type->driver.owner); |
c2fef456 JH |
1064 | |
1065 | return retval; | |
1da177e4 LT |
1066 | } |
1067 | ||
32078f91 | 1068 | static void usb_serial_disconnect(struct usb_interface *interface) |
1da177e4 LT |
1069 | { |
1070 | int i; | |
a8d6f0a9 | 1071 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1072 | struct device *dev = &interface->dev; |
1073 | struct usb_serial_port *port; | |
3fff3b43 | 1074 | struct tty_struct *tty; |
1da177e4 | 1075 | |
73e487fd | 1076 | usb_serial_console_disconnect(serial); |
1da177e4 | 1077 | |
a1cd7e99 | 1078 | mutex_lock(&serial->disc_mutex); |
a1cd7e99 ON |
1079 | /* must set a flag, to signal subdrivers */ |
1080 | serial->disconnected = 1; | |
2d93148a AS |
1081 | mutex_unlock(&serial->disc_mutex); |
1082 | ||
a1cd7e99 ON |
1083 | for (i = 0; i < serial->num_ports; ++i) { |
1084 | port = serial->port[i]; | |
3fff3b43 JH |
1085 | tty = tty_port_tty_get(&port->port); |
1086 | if (tty) { | |
1087 | tty_vhangup(tty); | |
1088 | tty_kref_put(tty); | |
2d93148a | 1089 | } |
3fff3b43 JH |
1090 | usb_serial_port_poison_urbs(port); |
1091 | wake_up_interruptible(&port->port.delta_msr_wait); | |
1092 | cancel_work_sync(&port->work); | |
1093 | if (device_is_registered(&port->dev)) | |
1094 | device_del(&port->dev); | |
2d93148a | 1095 | } |
0f16cfe3 JH |
1096 | if (serial->type->disconnect) |
1097 | serial->type->disconnect(serial); | |
2d93148a | 1098 | |
41bd34dd | 1099 | /* let the last holder of this object cause it to be cleaned up */ |
a1cd7e99 | 1100 | usb_serial_put(serial); |
1da177e4 LT |
1101 | dev_info(dev, "device disconnected\n"); |
1102 | } | |
1103 | ||
ec22559e ON |
1104 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1105 | { | |
1106 | struct usb_serial *serial = usb_get_intfdata(intf); | |
ec22559e ON |
1107 | int i, r = 0; |
1108 | ||
f8bece8d ON |
1109 | serial->suspending = 1; |
1110 | ||
93e4f47f ML |
1111 | /* |
1112 | * serial->type->suspend() MUST return 0 in system sleep context, | |
1113 | * otherwise, the resume callback has to recover device from | |
1114 | * previous suspend failure. | |
1115 | */ | |
81e5b23c ON |
1116 | if (serial->type->suspend) { |
1117 | r = serial->type->suspend(serial, message); | |
a5f6005d ON |
1118 | if (r < 0) { |
1119 | serial->suspending = 0; | |
81e5b23c | 1120 | goto err_out; |
a5f6005d | 1121 | } |
81e5b23c ON |
1122 | } |
1123 | ||
3fff3b43 JH |
1124 | for (i = 0; i < serial->num_ports; ++i) |
1125 | usb_serial_port_poison_urbs(serial->port[i]); | |
81e5b23c | 1126 | err_out: |
ec22559e ON |
1127 | return r; |
1128 | } | |
1129 | EXPORT_SYMBOL(usb_serial_suspend); | |
1130 | ||
6a5c821c JH |
1131 | static void usb_serial_unpoison_port_urbs(struct usb_serial *serial) |
1132 | { | |
6a5c821c JH |
1133 | int i; |
1134 | ||
3fff3b43 JH |
1135 | for (i = 0; i < serial->num_ports; ++i) |
1136 | usb_serial_port_unpoison_urbs(serial->port[i]); | |
6a5c821c JH |
1137 | } |
1138 | ||
ec22559e ON |
1139 | int usb_serial_resume(struct usb_interface *intf) |
1140 | { | |
1141 | struct usb_serial *serial = usb_get_intfdata(intf); | |
c49cfa91 | 1142 | int rv; |
ec22559e | 1143 | |
6a5c821c JH |
1144 | usb_serial_unpoison_port_urbs(serial); |
1145 | ||
f8bece8d | 1146 | serial->suspending = 0; |
8abaee23 | 1147 | if (serial->type->resume) |
c49cfa91 ON |
1148 | rv = serial->type->resume(serial); |
1149 | else | |
1150 | rv = usb_serial_generic_resume(serial); | |
f8bece8d | 1151 | |
c49cfa91 | 1152 | return rv; |
ec22559e ON |
1153 | } |
1154 | EXPORT_SYMBOL(usb_serial_resume); | |
1155 | ||
7186364e GKH |
1156 | static int usb_serial_reset_resume(struct usb_interface *intf) |
1157 | { | |
1158 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1159 | int rv; | |
1160 | ||
6a5c821c JH |
1161 | usb_serial_unpoison_port_urbs(serial); |
1162 | ||
7186364e | 1163 | serial->suspending = 0; |
ca0400d2 | 1164 | if (serial->type->reset_resume) { |
7186364e | 1165 | rv = serial->type->reset_resume(serial); |
ca0400d2 | 1166 | } else { |
dcd82cd1 GKH |
1167 | rv = -EOPNOTSUPP; |
1168 | intf->needs_binding = 1; | |
1169 | } | |
7186364e GKH |
1170 | |
1171 | return rv; | |
1172 | } | |
1173 | ||
b68e31d0 | 1174 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1175 | .open = serial_open, |
1176 | .close = serial_close, | |
1177 | .write = serial_write, | |
3e1f4901 | 1178 | .hangup = serial_hangup, |
1da177e4 LT |
1179 | .write_room = serial_write_room, |
1180 | .ioctl = serial_ioctl, | |
1181 | .set_termios = serial_set_termios, | |
1182 | .throttle = serial_throttle, | |
1183 | .unthrottle = serial_unthrottle, | |
1184 | .break_ctl = serial_break, | |
1185 | .chars_in_buffer = serial_chars_in_buffer, | |
0693196f | 1186 | .wait_until_sent = serial_wait_until_sent, |
1da177e4 LT |
1187 | .tiocmget = serial_tiocmget, |
1188 | .tiocmset = serial_tiocmset, | |
3e1f4901 JH |
1189 | .get_icount = serial_get_icount, |
1190 | .cleanup = serial_cleanup, | |
1191 | .install = serial_install, | |
6fd69d3c | 1192 | .proc_fops = &serial_proc_fops, |
1da177e4 LT |
1193 | }; |
1194 | ||
335f8514 | 1195 | |
1da177e4 LT |
1196 | struct tty_driver *usb_serial_tty_driver; |
1197 | ||
1198 | static int __init usb_serial_init(void) | |
1199 | { | |
1da177e4 LT |
1200 | int result; |
1201 | ||
455b4f7e | 1202 | usb_serial_tty_driver = alloc_tty_driver(USB_SERIAL_TTY_MINORS); |
1da177e4 LT |
1203 | if (!usb_serial_tty_driver) |
1204 | return -ENOMEM; | |
1205 | ||
1206 | /* Initialize our global data */ | |
1da177e4 LT |
1207 | result = bus_register(&usb_serial_bus_type); |
1208 | if (result) { | |
92931d24 | 1209 | pr_err("%s - registering bus driver failed\n", __func__); |
1da177e4 LT |
1210 | goto exit_bus; |
1211 | } | |
1212 | ||
1da177e4 | 1213 | usb_serial_tty_driver->driver_name = "usbserial"; |
3e1f4901 | 1214 | usb_serial_tty_driver->name = "ttyUSB"; |
455b4f7e | 1215 | usb_serial_tty_driver->major = USB_SERIAL_TTY_MAJOR; |
1da177e4 LT |
1216 | usb_serial_tty_driver->minor_start = 0; |
1217 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1218 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1219 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1220 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1221 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1222 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1223 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1224 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1225 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1226 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1227 | result = tty_register_driver(usb_serial_tty_driver); | |
1228 | if (result) { | |
92931d24 | 1229 | pr_err("%s - tty_register_driver failed\n", __func__); |
1da177e4 LT |
1230 | goto exit_reg_driver; |
1231 | } | |
1232 | ||
06299db3 | 1233 | /* register the generic driver, if we should */ |
3033bc8d | 1234 | result = usb_serial_generic_register(); |
06299db3 | 1235 | if (result < 0) { |
92931d24 | 1236 | pr_err("%s - registering generic driver failed\n", __func__); |
06299db3 GKH |
1237 | goto exit_generic; |
1238 | } | |
1239 | ||
1da177e4 LT |
1240 | return result; |
1241 | ||
06299db3 | 1242 | exit_generic: |
1da177e4 LT |
1243 | tty_unregister_driver(usb_serial_tty_driver); |
1244 | ||
1245 | exit_reg_driver: | |
1da177e4 LT |
1246 | bus_unregister(&usb_serial_bus_type); |
1247 | ||
1248 | exit_bus: | |
92931d24 | 1249 | pr_err("%s - returning with error %d\n", __func__, result); |
1da177e4 LT |
1250 | put_tty_driver(usb_serial_tty_driver); |
1251 | return result; | |
1252 | } | |
1253 | ||
1254 | ||
1255 | static void __exit usb_serial_exit(void) | |
1256 | { | |
1257 | usb_serial_console_exit(); | |
1258 | ||
1259 | usb_serial_generic_deregister(); | |
1260 | ||
1da177e4 LT |
1261 | tty_unregister_driver(usb_serial_tty_driver); |
1262 | put_tty_driver(usb_serial_tty_driver); | |
1263 | bus_unregister(&usb_serial_bus_type); | |
d23f47d4 | 1264 | idr_destroy(&serial_minors); |
1da177e4 LT |
1265 | } |
1266 | ||
1267 | ||
1268 | module_init(usb_serial_init); | |
1269 | module_exit(usb_serial_exit); | |
1270 | ||
1271 | #define set_to_generic_if_null(type, function) \ | |
1272 | do { \ | |
1273 | if (!type->function) { \ | |
1274 | type->function = usb_serial_generic_##function; \ | |
c3452f5e JH |
1275 | pr_debug("%s: using generic " #function "\n", \ |
1276 | type->driver.name); \ | |
1277 | } \ | |
1da177e4 LT |
1278 | } while (0) |
1279 | ||
c3452f5e | 1280 | static void usb_serial_operations_init(struct usb_serial_driver *device) |
1da177e4 LT |
1281 | { |
1282 | set_to_generic_if_null(device, open); | |
1283 | set_to_generic_if_null(device, write); | |
1284 | set_to_generic_if_null(device, close); | |
1285 | set_to_generic_if_null(device, write_room); | |
1286 | set_to_generic_if_null(device, chars_in_buffer); | |
dcf01050 JH |
1287 | if (device->tx_empty) |
1288 | set_to_generic_if_null(device, wait_until_sent); | |
1da177e4 LT |
1289 | set_to_generic_if_null(device, read_bulk_callback); |
1290 | set_to_generic_if_null(device, write_bulk_callback); | |
23154320 | 1291 | set_to_generic_if_null(device, process_read_urb); |
eaa3bcb0 | 1292 | set_to_generic_if_null(device, prepare_write_buffer); |
1da177e4 LT |
1293 | } |
1294 | ||
f799e767 | 1295 | static int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 LT |
1296 | { |
1297 | int retval; | |
1298 | ||
e4abe665 DY |
1299 | if (usb_disabled()) |
1300 | return -ENODEV; | |
1301 | ||
269bda1c GKH |
1302 | if (!driver->description) |
1303 | driver->description = driver->driver.name; | |
5620b5f7 AS |
1304 | if (!driver->usb_driver) { |
1305 | WARN(1, "Serial driver %s has no usb_driver\n", | |
1306 | driver->description); | |
1307 | return -EINVAL; | |
1308 | } | |
269bda1c | 1309 | |
c3452f5e JH |
1310 | usb_serial_operations_init(driver); |
1311 | ||
1da177e4 | 1312 | /* Add this device to our list of devices */ |
0daeed38 | 1313 | mutex_lock(&table_lock); |
ea65370d | 1314 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1315 | |
ea65370d | 1316 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1317 | if (retval) { |
92931d24 | 1318 | pr_err("problem %d when registering driver %s\n", retval, driver->description); |
ea65370d | 1319 | list_del(&driver->driver_list); |
ca0400d2 | 1320 | } else { |
ee42f6c9 | 1321 | pr_info("USB Serial support registered for %s\n", driver->description); |
ca0400d2 | 1322 | } |
0daeed38 | 1323 | mutex_unlock(&table_lock); |
1da177e4 LT |
1324 | return retval; |
1325 | } | |
1326 | ||
f799e767 | 1327 | static void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1328 | { |
ee42f6c9 | 1329 | pr_info("USB Serial deregistering driver %s\n", device->description); |
10164c2a | 1330 | |
0daeed38 | 1331 | mutex_lock(&table_lock); |
1da177e4 | 1332 | list_del(&device->driver_list); |
0daeed38 | 1333 | mutex_unlock(&table_lock); |
10164c2a JH |
1334 | |
1335 | usb_serial_bus_deregister(device); | |
1da177e4 | 1336 | } |
1da177e4 | 1337 | |
765e0ba6 AS |
1338 | /** |
1339 | * usb_serial_register_drivers - register drivers for a usb-serial module | |
765e0ba6 | 1340 | * @serial_drivers: NULL-terminated array of pointers to drivers to be registered |
68e24113 GKH |
1341 | * @name: name of the usb_driver for this set of @serial_drivers |
1342 | * @id_table: list of all devices this @serial_drivers set binds to | |
765e0ba6 | 1343 | * |
68e24113 GKH |
1344 | * Registers all the drivers in the @serial_drivers array, and dynamically |
1345 | * creates a struct usb_driver with the name @name and id_table of @id_table. | |
765e0ba6 | 1346 | */ |
68e24113 GKH |
1347 | int usb_serial_register_drivers(struct usb_serial_driver *const serial_drivers[], |
1348 | const char *name, | |
1349 | const struct usb_device_id *id_table) | |
765e0ba6 AS |
1350 | { |
1351 | int rc; | |
68e24113 | 1352 | struct usb_driver *udriver; |
765e0ba6 AS |
1353 | struct usb_serial_driver * const *sd; |
1354 | ||
1355 | /* | |
1356 | * udriver must be registered before any of the serial drivers, | |
1357 | * because the store_new_id() routine for the serial drivers (in | |
1358 | * bus.c) probes udriver. | |
1359 | * | |
1360 | * Performance hack: We don't want udriver to be probed until | |
1361 | * the serial drivers are registered, because the probe would | |
1362 | * simply fail for lack of a matching serial driver. | |
68e24113 | 1363 | * So we leave udriver's id_table set to NULL until we are all set. |
5cbe61c5 AS |
1364 | * |
1365 | * Suspend/resume support is implemented in the usb-serial core, | |
1366 | * so fill in the PM-related fields in udriver. | |
765e0ba6 | 1367 | */ |
68e24113 GKH |
1368 | udriver = kzalloc(sizeof(*udriver), GFP_KERNEL); |
1369 | if (!udriver) | |
1370 | return -ENOMEM; | |
765e0ba6 | 1371 | |
68e24113 | 1372 | udriver->name = name; |
765e0ba6 | 1373 | udriver->no_dynamic_id = 1; |
5cbe61c5 AS |
1374 | udriver->supports_autosuspend = 1; |
1375 | udriver->suspend = usb_serial_suspend; | |
1376 | udriver->resume = usb_serial_resume; | |
5026bb07 | 1377 | udriver->probe = usb_serial_probe; |
32078f91 | 1378 | udriver->disconnect = usb_serial_disconnect; |
7186364e GKH |
1379 | |
1380 | /* we only set the reset_resume field if the serial_driver has one */ | |
1381 | for (sd = serial_drivers; *sd; ++sd) { | |
44b0f083 | 1382 | if ((*sd)->reset_resume) { |
7186364e GKH |
1383 | udriver->reset_resume = usb_serial_reset_resume; |
1384 | break; | |
44b0f083 | 1385 | } |
7186364e GKH |
1386 | } |
1387 | ||
765e0ba6 AS |
1388 | rc = usb_register(udriver); |
1389 | if (rc) | |
647024a7 | 1390 | goto failed_usb_register; |
765e0ba6 AS |
1391 | |
1392 | for (sd = serial_drivers; *sd; ++sd) { | |
1393 | (*sd)->usb_driver = udriver; | |
1394 | rc = usb_serial_register(*sd); | |
1395 | if (rc) | |
1396 | goto failed; | |
1397 | } | |
1398 | ||
68e24113 GKH |
1399 | /* Now set udriver's id_table and look for matches */ |
1400 | udriver->id_table = id_table; | |
765e0ba6 AS |
1401 | rc = driver_attach(&udriver->drvwrap.driver); |
1402 | return 0; | |
1403 | ||
1404 | failed: | |
1405 | while (sd-- > serial_drivers) | |
1406 | usb_serial_deregister(*sd); | |
1407 | usb_deregister(udriver); | |
647024a7 AK |
1408 | failed_usb_register: |
1409 | kfree(udriver); | |
765e0ba6 AS |
1410 | return rc; |
1411 | } | |
1412 | EXPORT_SYMBOL_GPL(usb_serial_register_drivers); | |
1413 | ||
1414 | /** | |
1415 | * usb_serial_deregister_drivers - deregister drivers for a usb-serial module | |
765e0ba6 AS |
1416 | * @serial_drivers: NULL-terminated array of pointers to drivers to be deregistered |
1417 | * | |
68e24113 GKH |
1418 | * Deregisters all the drivers in the @serial_drivers array and deregisters and |
1419 | * frees the struct usb_driver that was created by the call to | |
1420 | * usb_serial_register_drivers(). | |
765e0ba6 | 1421 | */ |
68e24113 | 1422 | void usb_serial_deregister_drivers(struct usb_serial_driver *const serial_drivers[]) |
765e0ba6 | 1423 | { |
68e24113 GKH |
1424 | struct usb_driver *udriver = (*serial_drivers)->usb_driver; |
1425 | ||
765e0ba6 AS |
1426 | for (; *serial_drivers; ++serial_drivers) |
1427 | usb_serial_deregister(*serial_drivers); | |
1428 | usb_deregister(udriver); | |
68e24113 | 1429 | kfree(udriver); |
765e0ba6 AS |
1430 | } |
1431 | EXPORT_SYMBOL_GPL(usb_serial_deregister_drivers); | |
1da177e4 | 1432 | |
a8d6f0a9 AC |
1433 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1434 | MODULE_DESCRIPTION(DRIVER_DESC); | |
627cfa89 | 1435 | MODULE_LICENSE("GPL v2"); |