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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * USB Serial Converter driver | |
3 | * | |
7186364e | 4 | * Copyright (C) 1999 - 2012 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 | ||
92931d24 GKH |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
1da177e4 LT |
22 | #include <linux/kernel.h> |
23 | #include <linux/errno.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/tty.h> | |
27 | #include <linux/tty_driver.h> | |
28 | #include <linux/tty_flip.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/moduleparam.h> | |
6fd69d3c | 31 | #include <linux/seq_file.h> |
1da177e4 | 32 | #include <linux/spinlock.h> |
1ce7dd26 | 33 | #include <linux/mutex.h> |
1da177e4 | 34 | #include <linux/list.h> |
a8d6f0a9 | 35 | #include <linux/uaccess.h> |
c56d3000 | 36 | #include <linux/serial.h> |
1da177e4 | 37 | #include <linux/usb.h> |
a969888c | 38 | #include <linux/usb/serial.h> |
8e8dce06 | 39 | #include <linux/kfifo.h> |
1da177e4 LT |
40 | #include "pl2303.h" |
41 | ||
ee42f6c9 | 42 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@linuxfoundation.org>" |
1da177e4 LT |
43 | #define DRIVER_DESC "USB Serial Driver core" |
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 | ||
a8d6f0a9 AC |
52 | /* initially all NULL */ |
53 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; | |
3ddad823 | 54 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
55 | static LIST_HEAD(usb_serial_driver_list); |
56 | ||
8bc2c1b2 AS |
57 | /* |
58 | * Look up the serial structure. If it is found and it hasn't been | |
59 | * disconnected, return with its disc_mutex held and its refcount | |
60 | * incremented. Otherwise return NULL. | |
61 | */ | |
1da177e4 LT |
62 | struct usb_serial *usb_serial_get_by_index(unsigned index) |
63 | { | |
34ef50e5 ON |
64 | struct usb_serial *serial; |
65 | ||
3ddad823 | 66 | mutex_lock(&table_lock); |
34ef50e5 | 67 | serial = serial_table[index]; |
1da177e4 | 68 | |
8bc2c1b2 AS |
69 | if (serial) { |
70 | mutex_lock(&serial->disc_mutex); | |
71 | if (serial->disconnected) { | |
72 | mutex_unlock(&serial->disc_mutex); | |
73 | serial = NULL; | |
74 | } else { | |
75 | kref_get(&serial->kref); | |
76 | } | |
77 | } | |
3ddad823 | 78 | mutex_unlock(&table_lock); |
1da177e4 LT |
79 | return serial; |
80 | } | |
81 | ||
a8d6f0a9 AC |
82 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
83 | int num_ports, unsigned int *minor) | |
1da177e4 LT |
84 | { |
85 | unsigned int i, j; | |
86 | int good_spot; | |
87 | ||
92931d24 | 88 | dev_dbg(&serial->interface->dev, "%s %d\n", __func__, num_ports); |
1da177e4 LT |
89 | |
90 | *minor = 0; | |
3ddad823 | 91 | mutex_lock(&table_lock); |
1da177e4 LT |
92 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
93 | if (serial_table[i]) | |
94 | continue; | |
95 | ||
96 | good_spot = 1; | |
97 | for (j = 1; j <= num_ports-1; ++j) | |
98 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
99 | good_spot = 0; | |
100 | i += j; | |
101 | break; | |
102 | } | |
103 | if (good_spot == 0) | |
104 | continue; | |
105 | ||
106 | *minor = i; | |
a1f721c8 | 107 | j = 0; |
92931d24 | 108 | dev_dbg(&serial->interface->dev, "%s - minor base = %d\n", __func__, *minor); |
a1f721c8 | 109 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 110 | serial_table[i] = serial; |
a1f721c8 ON |
111 | serial->port[j++]->number = i; |
112 | } | |
3ddad823 | 113 | mutex_unlock(&table_lock); |
1da177e4 LT |
114 | return serial; |
115 | } | |
3ddad823 | 116 | mutex_unlock(&table_lock); |
1da177e4 LT |
117 | return NULL; |
118 | } | |
119 | ||
120 | static void return_serial(struct usb_serial *serial) | |
121 | { | |
122 | int i; | |
123 | ||
8bc2c1b2 | 124 | mutex_lock(&table_lock); |
a8d6f0a9 | 125 | for (i = 0; i < serial->num_ports; ++i) |
1da177e4 | 126 | serial_table[serial->minor + i] = NULL; |
8bc2c1b2 | 127 | mutex_unlock(&table_lock); |
1da177e4 LT |
128 | } |
129 | ||
130 | static void destroy_serial(struct kref *kref) | |
131 | { | |
132 | struct usb_serial *serial; | |
133 | struct usb_serial_port *port; | |
134 | int i; | |
135 | ||
136 | serial = to_usb_serial(kref); | |
137 | ||
521b85ae | 138 | /* return the minor range that this device had */ |
0282b7f2 AS |
139 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
140 | return_serial(serial); | |
521b85ae | 141 | |
a4720c65 AS |
142 | if (serial->attached) |
143 | serial->type->release(serial); | |
f9c99bb8 | 144 | |
41bd34dd AS |
145 | /* Now that nothing is using the ports, they can be freed */ |
146 | for (i = 0; i < serial->num_port_pointers; ++i) { | |
f9c99bb8 | 147 | port = serial->port[i]; |
41bd34dd AS |
148 | if (port) { |
149 | port->serial = NULL; | |
f9c99bb8 | 150 | put_device(&port->dev); |
1da177e4 LT |
151 | } |
152 | } | |
153 | ||
d7971051 | 154 | usb_put_intf(serial->interface); |
1da177e4 | 155 | usb_put_dev(serial->dev); |
a8d6f0a9 | 156 | kfree(serial); |
1da177e4 LT |
157 | } |
158 | ||
73e487fd GL |
159 | void usb_serial_put(struct usb_serial *serial) |
160 | { | |
161 | kref_put(&serial->kref, destroy_serial); | |
162 | } | |
163 | ||
1da177e4 LT |
164 | /***************************************************************************** |
165 | * Driver tty interface functions | |
166 | *****************************************************************************/ | |
f5b0953a AS |
167 | |
168 | /** | |
169 | * serial_install - install tty | |
170 | * @driver: the driver (USB in our case) | |
171 | * @tty: the tty being created | |
172 | * | |
173 | * Create the termios objects for this tty. We use the default | |
174 | * USB serial settings but permit them to be overridden by | |
175 | * serial->type->init_termios. | |
cc56cd01 AS |
176 | * |
177 | * This is the first place a new tty gets used. Hence this is where we | |
178 | * acquire references to the usb_serial structure and the driver module, | |
179 | * where we store a pointer to the port, and where we do an autoresume. | |
f278a2f7 | 180 | * All these actions are reversed in serial_cleanup(). |
f5b0953a AS |
181 | */ |
182 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) | |
183 | { | |
184 | int idx = tty->index; | |
185 | struct usb_serial *serial; | |
cc56cd01 AS |
186 | struct usb_serial_port *port; |
187 | int retval = -ENODEV; | |
188 | ||
189 | serial = usb_serial_get_by_index(idx); | |
190 | if (!serial) | |
191 | return retval; | |
192 | ||
193 | port = serial->port[idx - serial->minor]; | |
194 | if (!port) | |
195 | goto error_no_port; | |
196 | if (!try_module_get(serial->type->driver.owner)) | |
197 | goto error_module_get; | |
198 | ||
199 | retval = usb_autopm_get_interface(serial->interface); | |
200 | if (retval) | |
201 | goto error_get_interface; | |
f5b0953a | 202 | |
ca4ff100 | 203 | retval = tty_port_install(&port->port, driver, tty); |
76f82a7a JS |
204 | if (retval) |
205 | goto error_init_termios; | |
206 | ||
cc56cd01 AS |
207 | mutex_unlock(&serial->disc_mutex); |
208 | ||
7e29bb4b AS |
209 | /* allow the driver to update the settings */ |
210 | if (serial->type->init_termios) | |
211 | serial->type->init_termios(tty); | |
212 | ||
cc56cd01 AS |
213 | tty->driver_data = port; |
214 | ||
cc56cd01 AS |
215 | return retval; |
216 | ||
7e29bb4b | 217 | error_init_termios: |
76f82a7a JS |
218 | usb_autopm_put_interface(serial->interface); |
219 | error_get_interface: | |
cc56cd01 AS |
220 | module_put(serial->type->driver.owner); |
221 | error_module_get: | |
222 | error_no_port: | |
223 | usb_serial_put(serial); | |
224 | mutex_unlock(&serial->disc_mutex); | |
225 | return retval; | |
f5b0953a AS |
226 | } |
227 | ||
64bc3979 | 228 | static int serial_activate(struct tty_port *tport, struct tty_struct *tty) |
1da177e4 | 229 | { |
64bc3979 AC |
230 | struct usb_serial_port *port = |
231 | container_of(tport, struct usb_serial_port, port); | |
320348c8 AS |
232 | struct usb_serial *serial = port->serial; |
233 | int retval; | |
331879fd | 234 | |
64bc3979 AC |
235 | mutex_lock(&serial->disc_mutex); |
236 | if (serial->disconnected) | |
237 | retval = -ENODEV; | |
238 | else | |
239 | retval = port->serial->type->open(tty, port); | |
240 | mutex_unlock(&serial->disc_mutex); | |
3827d876 JH |
241 | |
242 | if (retval < 0) | |
243 | retval = usb_translate_errors(retval); | |
244 | ||
64bc3979 AC |
245 | return retval; |
246 | } | |
1da177e4 | 247 | |
64bc3979 AC |
248 | static int serial_open(struct tty_struct *tty, struct file *filp) |
249 | { | |
250 | struct usb_serial_port *port = tty->driver_data; | |
320348c8 | 251 | |
92931d24 | 252 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); |
64bc3979 | 253 | return tty_port_open(&port->port, tty, filp); |
1da177e4 LT |
254 | } |
255 | ||
335f8514 | 256 | /** |
74556123 | 257 | * serial_down - shut down hardware |
e1108a63 | 258 | * @tport: tty port to shut down |
335f8514 | 259 | * |
f5b0953a | 260 | * Shut down a USB serial port unless it is the console. We never |
e1108a63 AC |
261 | * shut down the console hardware as it will always be in use. Serialized |
262 | * against activate by the tport mutex and kept to matching open/close pairs | |
263 | * of calls by the ASYNCB_INITIALIZED flag. | |
335f8514 | 264 | */ |
e1108a63 | 265 | static void serial_down(struct tty_port *tport) |
1da177e4 | 266 | { |
e1108a63 AC |
267 | struct usb_serial_port *port = |
268 | container_of(tport, struct usb_serial_port, port); | |
335f8514 | 269 | struct usb_serial_driver *drv = port->serial->type; |
f5b0953a AS |
270 | /* |
271 | * The console is magical. Do not hang up the console hardware | |
272 | * or there will be tears. | |
273 | */ | |
bd5afa9e | 274 | if (port->port.console) |
1da177e4 | 275 | return; |
335f8514 AC |
276 | if (drv->close) |
277 | drv->close(port); | |
335f8514 AC |
278 | } |
279 | ||
f5b0953a AS |
280 | static void serial_hangup(struct tty_struct *tty) |
281 | { | |
282 | struct usb_serial_port *port = tty->driver_data; | |
92931d24 GKH |
283 | |
284 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); | |
f5b0953a | 285 | tty_port_hangup(&port->port); |
f5b0953a AS |
286 | } |
287 | ||
288 | static void serial_close(struct tty_struct *tty, struct file *filp) | |
289 | { | |
290 | struct usb_serial_port *port = tty->driver_data; | |
92931d24 GKH |
291 | |
292 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); | |
e1108a63 | 293 | tty_port_close(&port->port, tty, filp); |
f5b0953a AS |
294 | } |
295 | ||
335f8514 | 296 | /** |
f278a2f7 | 297 | * serial_cleanup - free resources post close/hangup |
f5b0953a | 298 | * @port: port to free up |
335f8514 | 299 | * |
f5b0953a AS |
300 | * Do the resource freeing and refcount dropping for the port. |
301 | * Avoid freeing the console. | |
4455e344 | 302 | * |
36b3c070 | 303 | * Called asynchronously after the last tty kref is dropped. |
335f8514 | 304 | */ |
f278a2f7 | 305 | static void serial_cleanup(struct tty_struct *tty) |
335f8514 | 306 | { |
4455e344 | 307 | struct usb_serial_port *port = tty->driver_data; |
335f8514 AC |
308 | struct usb_serial *serial; |
309 | struct module *owner; | |
310 | ||
f5b0953a AS |
311 | /* The console is magical. Do not hang up the console hardware |
312 | * or there will be tears. | |
313 | */ | |
bd5afa9e | 314 | if (port->port.console) |
335f8514 AC |
315 | return; |
316 | ||
92931d24 | 317 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); |
ff8324df | 318 | |
cc56cd01 AS |
319 | tty->driver_data = NULL; |
320 | ||
335f8514 AC |
321 | serial = port->serial; |
322 | owner = serial->type->driver.owner; | |
41bd34dd | 323 | |
335f8514 AC |
324 | mutex_lock(&serial->disc_mutex); |
325 | if (!serial->disconnected) | |
326 | usb_autopm_put_interface(serial->interface); | |
327 | mutex_unlock(&serial->disc_mutex); | |
41bd34dd | 328 | |
2d93148a | 329 | usb_serial_put(serial); |
335f8514 AC |
330 | module_put(owner); |
331 | } | |
332 | ||
a8d6f0a9 AC |
333 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
334 | int count) | |
1da177e4 | 335 | { |
81671ddb | 336 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 337 | int retval = -ENODEV; |
1da177e4 | 338 | |
f34d7a5b | 339 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
340 | goto exit; |
341 | ||
92931d24 GKH |
342 | dev_dbg(tty->dev, "%s - port %d, %d byte(s)\n", __func__, |
343 | port->number, count); | |
1da177e4 | 344 | |
1da177e4 | 345 | /* pass on to the driver specific version of this function */ |
95da310e | 346 | retval = port->serial->type->write(tty, port, buf, count); |
c6249ff7 JH |
347 | if (retval < 0) |
348 | retval = usb_translate_errors(retval); | |
1da177e4 LT |
349 | exit: |
350 | return retval; | |
351 | } | |
352 | ||
a8d6f0a9 | 353 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 354 | { |
81671ddb | 355 | struct usb_serial_port *port = tty->driver_data; |
92931d24 GKH |
356 | |
357 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); | |
1da177e4 | 358 | /* pass on to the driver specific version of this function */ |
95da310e | 359 | return port->serial->type->write_room(tty); |
1da177e4 LT |
360 | } |
361 | ||
a8d6f0a9 | 362 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 363 | { |
81671ddb | 364 | struct usb_serial_port *port = tty->driver_data; |
810360a0 JH |
365 | struct usb_serial *serial = port->serial; |
366 | int count = 0; | |
92931d24 GKH |
367 | |
368 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); | |
1da177e4 | 369 | |
810360a0 | 370 | mutex_lock(&serial->disc_mutex); |
eff6937a AC |
371 | /* if the device was unplugged then any remaining characters |
372 | fell out of the connector ;) */ | |
810360a0 JH |
373 | if (serial->disconnected) |
374 | count = 0; | |
375 | else | |
376 | count = serial->type->chars_in_buffer(tty); | |
377 | mutex_unlock(&serial->disc_mutex); | |
378 | ||
379 | return count; | |
1da177e4 LT |
380 | } |
381 | ||
a8d6f0a9 | 382 | static void serial_throttle(struct tty_struct *tty) |
1da177e4 | 383 | { |
81671ddb | 384 | struct usb_serial_port *port = tty->driver_data; |
92931d24 GKH |
385 | |
386 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); | |
1da177e4 | 387 | |
1da177e4 LT |
388 | /* pass on to the driver specific version of this function */ |
389 | if (port->serial->type->throttle) | |
95da310e | 390 | port->serial->type->throttle(tty); |
1da177e4 LT |
391 | } |
392 | ||
a8d6f0a9 | 393 | static void serial_unthrottle(struct tty_struct *tty) |
1da177e4 | 394 | { |
81671ddb | 395 | struct usb_serial_port *port = tty->driver_data; |
92931d24 GKH |
396 | |
397 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); | |
1da177e4 | 398 | |
1da177e4 LT |
399 | /* pass on to the driver specific version of this function */ |
400 | if (port->serial->type->unthrottle) | |
95da310e | 401 | port->serial->type->unthrottle(tty); |
1da177e4 LT |
402 | } |
403 | ||
6caa76b7 | 404 | static int serial_ioctl(struct tty_struct *tty, |
a8d6f0a9 | 405 | unsigned int cmd, unsigned long arg) |
1da177e4 | 406 | { |
81671ddb | 407 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
408 | int retval = -ENODEV; |
409 | ||
92931d24 GKH |
410 | dev_dbg(tty->dev, "%s - port %d, cmd 0x%.4x\n", __func__, |
411 | port->number, cmd); | |
1da177e4 | 412 | |
a8d6f0a9 AC |
413 | /* pass on to the driver specific version of this function |
414 | if it is available */ | |
f34d7a5b | 415 | if (port->serial->type->ioctl) { |
00a0d0d6 | 416 | retval = port->serial->type->ioctl(tty, cmd, arg); |
a8d6f0a9 | 417 | } else |
1da177e4 | 418 | retval = -ENOIOCTLCMD; |
1da177e4 LT |
419 | return retval; |
420 | } | |
421 | ||
a8d6f0a9 | 422 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 423 | { |
81671ddb | 424 | struct usb_serial_port *port = tty->driver_data; |
92931d24 GKH |
425 | |
426 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); | |
1da177e4 | 427 | |
a8d6f0a9 AC |
428 | /* pass on to the driver specific version of this function |
429 | if it is available */ | |
1da177e4 | 430 | if (port->serial->type->set_termios) |
95da310e | 431 | port->serial->type->set_termios(tty, port, old); |
33785091 | 432 | else |
adc8d746 | 433 | tty_termios_copy_hw(&tty->termios, old); |
1da177e4 LT |
434 | } |
435 | ||
9e98966c | 436 | static int serial_break(struct tty_struct *tty, int break_state) |
1da177e4 | 437 | { |
81671ddb | 438 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 439 | |
92931d24 | 440 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); |
1da177e4 | 441 | |
a8d6f0a9 AC |
442 | /* pass on to the driver specific version of this function |
443 | if it is available */ | |
6b447f04 | 444 | if (port->serial->type->break_ctl) |
95da310e | 445 | port->serial->type->break_ctl(tty, break_state); |
9e98966c | 446 | return 0; |
1da177e4 LT |
447 | } |
448 | ||
6fd69d3c | 449 | static int serial_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
450 | { |
451 | struct usb_serial *serial; | |
1da177e4 | 452 | int i; |
1da177e4 LT |
453 | char tmp[40]; |
454 | ||
6fd69d3c AD |
455 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
456 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { | |
1da177e4 LT |
457 | serial = usb_serial_get_by_index(i); |
458 | if (serial == NULL) | |
459 | continue; | |
460 | ||
6fd69d3c | 461 | seq_printf(m, "%d:", i); |
18fcac35 | 462 | if (serial->type->driver.owner) |
6fd69d3c | 463 | seq_printf(m, " module:%s", |
a8d6f0a9 | 464 | module_name(serial->type->driver.owner)); |
6fd69d3c | 465 | seq_printf(m, " name:\"%s\"", |
a8d6f0a9 | 466 | serial->type->description); |
6fd69d3c | 467 | seq_printf(m, " vendor:%04x product:%04x", |
a8d6f0a9 AC |
468 | le16_to_cpu(serial->dev->descriptor.idVendor), |
469 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
6fd69d3c AD |
470 | seq_printf(m, " num_ports:%d", serial->num_ports); |
471 | seq_printf(m, " port:%d", i - serial->minor + 1); | |
1da177e4 | 472 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
6fd69d3c | 473 | seq_printf(m, " path:%s", tmp); |
a8d6f0a9 | 474 | |
6fd69d3c | 475 | seq_putc(m, '\n'); |
73e487fd | 476 | usb_serial_put(serial); |
8bc2c1b2 | 477 | mutex_unlock(&serial->disc_mutex); |
1da177e4 | 478 | } |
6fd69d3c | 479 | return 0; |
1da177e4 LT |
480 | } |
481 | ||
6fd69d3c AD |
482 | static int serial_proc_open(struct inode *inode, struct file *file) |
483 | { | |
484 | return single_open(file, serial_proc_show, NULL); | |
485 | } | |
486 | ||
487 | static const struct file_operations serial_proc_fops = { | |
488 | .owner = THIS_MODULE, | |
489 | .open = serial_proc_open, | |
490 | .read = seq_read, | |
491 | .llseek = seq_lseek, | |
492 | .release = single_release, | |
493 | }; | |
494 | ||
60b33c13 | 495 | static int serial_tiocmget(struct tty_struct *tty) |
1da177e4 | 496 | { |
81671ddb | 497 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 498 | |
92931d24 | 499 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); |
1da177e4 | 500 | |
1da177e4 | 501 | if (port->serial->type->tiocmget) |
60b33c13 | 502 | return port->serial->type->tiocmget(tty); |
1da177e4 LT |
503 | return -EINVAL; |
504 | } | |
505 | ||
20b9d177 | 506 | static int serial_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
507 | unsigned int set, unsigned int clear) |
508 | { | |
81671ddb | 509 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 510 | |
92931d24 | 511 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); |
1da177e4 | 512 | |
1da177e4 | 513 | if (port->serial->type->tiocmset) |
20b9d177 | 514 | return port->serial->type->tiocmset(tty, set, clear); |
1da177e4 LT |
515 | return -EINVAL; |
516 | } | |
517 | ||
d281da7f AC |
518 | static int serial_get_icount(struct tty_struct *tty, |
519 | struct serial_icounter_struct *icount) | |
520 | { | |
521 | struct usb_serial_port *port = tty->driver_data; | |
522 | ||
92931d24 | 523 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); |
d281da7f AC |
524 | |
525 | if (port->serial->type->get_icount) | |
526 | return port->serial->type->get_icount(tty, icount); | |
527 | return -EINVAL; | |
528 | } | |
529 | ||
cf2c7481 PZ |
530 | /* |
531 | * We would be calling tty_wakeup here, but unfortunately some line | |
532 | * disciplines have an annoying habit of calling tty->write from | |
533 | * the write wakeup callback (e.g. n_hdlc.c). | |
534 | */ | |
535 | void usb_serial_port_softint(struct usb_serial_port *port) | |
536 | { | |
537 | schedule_work(&port->work); | |
538 | } | |
a8d6f0a9 | 539 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
cf2c7481 | 540 | |
c4028958 | 541 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 542 | { |
c4028958 DH |
543 | struct usb_serial_port *port = |
544 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
545 | struct tty_struct *tty; |
546 | ||
4a90f09b | 547 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
548 | if (!tty) |
549 | return; | |
550 | ||
92931d24 GKH |
551 | dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number); |
552 | ||
1da177e4 | 553 | tty_wakeup(tty); |
4a90f09b | 554 | tty_kref_put(tty); |
1da177e4 LT |
555 | } |
556 | ||
34ef50e5 | 557 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 558 | { |
27c7acf2 JH |
559 | int i; |
560 | ||
d83b4053 JH |
561 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
562 | usb_kill_urb(port->read_urbs[i]); | |
27c7acf2 JH |
563 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
564 | usb_kill_urb(port->write_urbs[i]); | |
5adceac5 ON |
565 | /* |
566 | * This is tricky. | |
567 | * Some drivers submit the read_urb in the | |
568 | * handler for the write_urb or vice versa | |
569 | * this order determines the order in which | |
570 | * usb_kill_urb() must be used to reliably | |
571 | * kill the URBs. As it is unknown here, | |
572 | * both orders must be used in turn. | |
573 | * The call below is not redundant. | |
574 | */ | |
575 | usb_kill_urb(port->read_urb); | |
1da177e4 | 576 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 577 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
578 | } |
579 | ||
41bd34dd | 580 | static void port_release(struct device *dev) |
34ef50e5 | 581 | { |
41bd34dd | 582 | struct usb_serial_port *port = to_usb_serial_port(dev); |
27c7acf2 | 583 | int i; |
41bd34dd | 584 | |
92931d24 | 585 | dev_dbg(dev, "%s\n", __func__); |
41bd34dd | 586 | |
2d93148a AS |
587 | /* |
588 | * Stop all the traffic before cancelling the work, so that | |
589 | * nobody will restart it by calling usb_serial_port_softint. | |
590 | */ | |
34ef50e5 | 591 | kill_traffic(port); |
2d93148a AS |
592 | cancel_work_sync(&port->work); |
593 | ||
34ef50e5 | 594 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 | 595 | usb_free_urb(port->interrupt_out_urb); |
d83b4053 JH |
596 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
597 | usb_free_urb(port->read_urbs[i]); | |
598 | kfree(port->bulk_in_buffers[i]); | |
599 | } | |
27c7acf2 JH |
600 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) { |
601 | usb_free_urb(port->write_urbs[i]); | |
602 | kfree(port->bulk_out_buffers[i]); | |
603 | } | |
119eecc8 | 604 | kfifo_free(&port->write_fifo); |
1da177e4 LT |
605 | kfree(port->interrupt_in_buffer); |
606 | kfree(port->interrupt_out_buffer); | |
191c5f10 | 607 | tty_port_destroy(&port->port); |
1da177e4 LT |
608 | kfree(port); |
609 | } | |
610 | ||
a8d6f0a9 AC |
611 | static struct usb_serial *create_serial(struct usb_device *dev, |
612 | struct usb_interface *interface, | |
613 | struct usb_serial_driver *driver) | |
1da177e4 LT |
614 | { |
615 | struct usb_serial *serial; | |
616 | ||
80b6ca48 | 617 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 618 | if (!serial) { |
441b62c1 | 619 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
620 | return NULL; |
621 | } | |
1da177e4 | 622 | serial->dev = usb_get_dev(dev); |
ea65370d | 623 | serial->type = driver; |
d7971051 | 624 | serial->interface = usb_get_intf(interface); |
1da177e4 | 625 | kref_init(&serial->kref); |
a1cd7e99 | 626 | mutex_init(&serial->disc_mutex); |
0282b7f2 | 627 | serial->minor = SERIAL_TTY_NO_MINOR; |
1da177e4 LT |
628 | |
629 | return serial; | |
630 | } | |
631 | ||
93bacefc | 632 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 633 | struct usb_serial_driver *drv) |
93bacefc GKH |
634 | { |
635 | struct usb_dynid *dynid; | |
636 | ||
637 | spin_lock(&drv->dynids.lock); | |
638 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
639 | if (usb_match_one_id(intf, &dynid->id)) { | |
640 | spin_unlock(&drv->dynids.lock); | |
641 | return &dynid->id; | |
642 | } | |
643 | } | |
644 | spin_unlock(&drv->dynids.lock); | |
645 | return NULL; | |
646 | } | |
647 | ||
648 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
649 | struct usb_interface *intf) | |
650 | { | |
651 | const struct usb_device_id *id; | |
652 | ||
653 | id = usb_match_id(intf, drv->id_table); | |
654 | if (id) { | |
92931d24 | 655 | dev_dbg(&intf->dev, "static descriptor matches\n"); |
93bacefc GKH |
656 | goto exit; |
657 | } | |
658 | id = match_dynamic_id(intf, drv); | |
659 | if (id) | |
92931d24 | 660 | dev_dbg(&intf->dev, "dynamic descriptor matches\n"); |
93bacefc GKH |
661 | exit: |
662 | return id; | |
663 | } | |
664 | ||
0daeed38 | 665 | /* Caller must hold table_lock */ |
a8d6f0a9 AC |
666 | static struct usb_serial_driver *search_serial_device( |
667 | struct usb_interface *iface) | |
1da177e4 | 668 | { |
954c3f8a | 669 | const struct usb_device_id *id = NULL; |
063a2da8 | 670 | struct usb_serial_driver *drv; |
954c3f8a | 671 | struct usb_driver *driver = to_usb_driver(iface->dev.driver); |
1da177e4 | 672 | |
93b1fae4 | 673 | /* Check if the usb id matches a known device */ |
063a2da8 | 674 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
954c3f8a BM |
675 | if (drv->usb_driver == driver) |
676 | id = get_iface_id(drv, iface); | |
93bacefc | 677 | if (id) |
063a2da8 | 678 | return drv; |
1da177e4 LT |
679 | } |
680 | ||
681 | return NULL; | |
682 | } | |
683 | ||
335f8514 AC |
684 | static int serial_carrier_raised(struct tty_port *port) |
685 | { | |
686 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
687 | struct usb_serial_driver *drv = p->serial->type; | |
3e1f4901 | 688 | |
335f8514 AC |
689 | if (drv->carrier_raised) |
690 | return drv->carrier_raised(p); | |
691 | /* No carrier control - don't block */ | |
3e1f4901 | 692 | return 1; |
335f8514 AC |
693 | } |
694 | ||
695 | static void serial_dtr_rts(struct tty_port *port, int on) | |
696 | { | |
697 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
b2ca6990 JH |
698 | struct usb_serial *serial = p->serial; |
699 | struct usb_serial_driver *drv = serial->type; | |
3e1f4901 | 700 | |
b2ca6990 JH |
701 | if (!drv->dtr_rts) |
702 | return; | |
703 | /* | |
704 | * Work-around bug in the tty-layer which can result in dtr_rts | |
705 | * being called after a disconnect (and tty_unregister_device | |
706 | * has returned). Remove once bug has been squashed. | |
707 | */ | |
708 | mutex_lock(&serial->disc_mutex); | |
709 | if (!serial->disconnected) | |
335f8514 | 710 | drv->dtr_rts(p, on); |
b2ca6990 | 711 | mutex_unlock(&serial->disc_mutex); |
335f8514 AC |
712 | } |
713 | ||
714 | static const struct tty_port_operations serial_port_ops = { | |
715 | .carrier_raised = serial_carrier_raised, | |
716 | .dtr_rts = serial_dtr_rts, | |
64bc3979 | 717 | .activate = serial_activate, |
e1108a63 | 718 | .shutdown = serial_down, |
335f8514 AC |
719 | }; |
720 | ||
2edd284b | 721 | static int usb_serial_probe(struct usb_interface *interface, |
1da177e4 LT |
722 | const struct usb_device_id *id) |
723 | { | |
92931d24 | 724 | struct device *ddev = &interface->dev; |
a8d6f0a9 | 725 | struct usb_device *dev = interface_to_usbdev(interface); |
1da177e4 LT |
726 | struct usb_serial *serial = NULL; |
727 | struct usb_serial_port *port; | |
728 | struct usb_host_interface *iface_desc; | |
729 | struct usb_endpoint_descriptor *endpoint; | |
730 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
731 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
732 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
733 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 734 | struct usb_serial_driver *type = NULL; |
1da177e4 | 735 | int retval; |
dd9ca5d9 | 736 | unsigned int minor; |
1da177e4 LT |
737 | int buffer_size; |
738 | int i; | |
d83b4053 | 739 | int j; |
1da177e4 LT |
740 | int num_interrupt_in = 0; |
741 | int num_interrupt_out = 0; | |
742 | int num_bulk_in = 0; | |
743 | int num_bulk_out = 0; | |
744 | int num_ports = 0; | |
745 | int max_endpoints; | |
746 | ||
0daeed38 | 747 | mutex_lock(&table_lock); |
1da177e4 LT |
748 | type = search_serial_device(interface); |
749 | if (!type) { | |
0daeed38 | 750 | mutex_unlock(&table_lock); |
92931d24 | 751 | dev_dbg(ddev, "none matched\n"); |
1da177e4 LT |
752 | return -ENODEV; |
753 | } | |
754 | ||
0daeed38 AK |
755 | if (!try_module_get(type->driver.owner)) { |
756 | mutex_unlock(&table_lock); | |
92931d24 | 757 | dev_err(ddev, "module get failed, exiting\n"); |
0daeed38 AK |
758 | return -EIO; |
759 | } | |
760 | mutex_unlock(&table_lock); | |
761 | ||
a8d6f0a9 | 762 | serial = create_serial(dev, interface, type); |
1da177e4 | 763 | if (!serial) { |
d92a3ca6 | 764 | module_put(type->driver.owner); |
92931d24 | 765 | dev_err(ddev, "%s - out of memory\n", __func__); |
1da177e4 LT |
766 | return -ENOMEM; |
767 | } | |
768 | ||
769 | /* if this device type has a probe function, call it */ | |
770 | if (type->probe) { | |
771 | const struct usb_device_id *id; | |
772 | ||
93bacefc | 773 | id = get_iface_id(type, interface); |
1da177e4 | 774 | retval = type->probe(serial, id); |
1da177e4 LT |
775 | |
776 | if (retval) { | |
92931d24 | 777 | dev_dbg(ddev, "sub driver rejected device\n"); |
0658a336 | 778 | usb_serial_put(serial); |
d92a3ca6 | 779 | module_put(type->driver.owner); |
1da177e4 LT |
780 | return retval; |
781 | } | |
782 | } | |
783 | ||
784 | /* descriptor matches, let's find the endpoints needed */ | |
785 | /* check out the endpoints */ | |
786 | iface_desc = interface->cur_altsetting; | |
787 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
788 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
789 | |
790 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 | 791 | /* we found a bulk in endpoint */ |
92931d24 | 792 | dev_dbg(ddev, "found bulk in on endpoint %d\n", i); |
1da177e4 LT |
793 | bulk_in_endpoint[num_bulk_in] = endpoint; |
794 | ++num_bulk_in; | |
795 | } | |
796 | ||
4fa1bbf5 | 797 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 | 798 | /* we found a bulk out endpoint */ |
92931d24 | 799 | dev_dbg(ddev, "found bulk out on endpoint %d\n", i); |
1da177e4 LT |
800 | bulk_out_endpoint[num_bulk_out] = endpoint; |
801 | ++num_bulk_out; | |
802 | } | |
4fa1bbf5 LFC |
803 | |
804 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 | 805 | /* we found a interrupt in endpoint */ |
92931d24 | 806 | dev_dbg(ddev, "found interrupt in on endpoint %d\n", i); |
1da177e4 LT |
807 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
808 | ++num_interrupt_in; | |
809 | } | |
810 | ||
4fa1bbf5 | 811 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 | 812 | /* we found an interrupt out endpoint */ |
92931d24 | 813 | dev_dbg(ddev, "found interrupt out on endpoint %d\n", i); |
1da177e4 LT |
814 | interrupt_out_endpoint[num_interrupt_out] = endpoint; |
815 | ++num_interrupt_out; | |
816 | } | |
817 | } | |
818 | ||
819 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
a8d6f0a9 | 820 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
1da177e4 LT |
821 | /* this is needed due to the looney way its endpoints are set up */ |
822 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
823 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
824 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
825 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
826 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
ce816cf9 AB |
827 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
828 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && | |
829 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { | |
1da177e4 LT |
830 | if (interface != dev->actconfig->interface[0]) { |
831 | /* check out the endpoints of the other interface*/ | |
832 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
833 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
834 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 835 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 | 836 | /* we found a interrupt in endpoint */ |
92931d24 | 837 | dev_dbg(ddev, "found interrupt in for Prolific device on separate interface\n"); |
1da177e4 LT |
838 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
839 | ++num_interrupt_in; | |
840 | } | |
841 | } | |
842 | } | |
843 | ||
844 | /* Now make sure the PL-2303 is configured correctly. | |
845 | * If not, give up now and hope this hack will work | |
846 | * properly during a later invocation of usb_serial_probe | |
847 | */ | |
848 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
92931d24 | 849 | dev_info(ddev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
0658a336 | 850 | usb_serial_put(serial); |
d92a3ca6 | 851 | module_put(type->driver.owner); |
1da177e4 LT |
852 | return -ENODEV; |
853 | } | |
854 | } | |
855 | /* END HORRIBLE HACK FOR PL2303 */ | |
856 | #endif | |
857 | ||
1da177e4 LT |
858 | #ifdef CONFIG_USB_SERIAL_GENERIC |
859 | if (type == &usb_serial_generic_device) { | |
860 | num_ports = num_bulk_out; | |
861 | if (num_ports == 0) { | |
92931d24 | 862 | dev_err(ddev, "Generic device with no bulk out, not allowed.\n"); |
0658a336 | 863 | usb_serial_put(serial); |
d92a3ca6 | 864 | module_put(type->driver.owner); |
1da177e4 LT |
865 | return -EIO; |
866 | } | |
92931d24 GKH |
867 | dev_info(ddev, "The \"generic\" usb-serial driver is only for testing and one-off prototypes.\n"); |
868 | dev_info(ddev, "Tell linux-usb@vger.kernel.org to add your device to a proper driver.\n"); | |
1da177e4 LT |
869 | } |
870 | #endif | |
871 | if (!num_ports) { | |
872 | /* if this device type has a calc_num_ports function, call it */ | |
d92a3ca6 | 873 | if (type->calc_num_ports) |
a8d6f0a9 | 874 | num_ports = type->calc_num_ports(serial); |
1da177e4 LT |
875 | if (!num_ports) |
876 | num_ports = type->num_ports; | |
877 | } | |
878 | ||
1da177e4 LT |
879 | serial->num_ports = num_ports; |
880 | serial->num_bulk_in = num_bulk_in; | |
881 | serial->num_bulk_out = num_bulk_out; | |
882 | serial->num_interrupt_in = num_interrupt_in; | |
883 | serial->num_interrupt_out = num_interrupt_out; | |
884 | ||
063a2da8 | 885 | /* found all that we need */ |
92931d24 | 886 | dev_info(ddev, "%s converter detected\n", type->description); |
063a2da8 | 887 | |
1da177e4 | 888 | /* create our ports, we need as many as the max endpoints */ |
a8d6f0a9 AC |
889 | /* we don't use num_ports here because some devices have more |
890 | endpoint pairs than ports */ | |
1da177e4 LT |
891 | max_endpoints = max(num_bulk_in, num_bulk_out); |
892 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
893 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
894 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
895 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 | 896 | |
92931d24 | 897 | dev_dbg(ddev, "setting up %d port structures for this device", max_endpoints); |
1da177e4 | 898 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 899 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
900 | if (!port) |
901 | goto probe_error; | |
4a90f09b | 902 | tty_port_init(&port->port); |
335f8514 | 903 | port->port.ops = &serial_port_ops; |
1da177e4 | 904 | port->serial = serial; |
507ca9bc | 905 | spin_lock_init(&port->lock); |
eba0e3c3 | 906 | init_waitqueue_head(&port->delta_msr_wait); |
e1108a63 AC |
907 | /* Keep this for private driver use for the moment but |
908 | should probably go away */ | |
c4028958 | 909 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 | 910 | serial->port[i] = port; |
41bd34dd AS |
911 | port->dev.parent = &interface->dev; |
912 | port->dev.driver = NULL; | |
913 | port->dev.bus = &usb_serial_bus_type; | |
914 | port->dev.release = &port_release; | |
915 | device_initialize(&port->dev); | |
1da177e4 LT |
916 | } |
917 | ||
918 | /* set up the endpoint information */ | |
919 | for (i = 0; i < num_bulk_in; ++i) { | |
920 | endpoint = bulk_in_endpoint[i]; | |
921 | port = serial->port[i]; | |
969e3033 | 922 | buffer_size = max_t(int, serial->type->bulk_in_size, |
29cc8897 | 923 | usb_endpoint_maxp(endpoint)); |
1da177e4 LT |
924 | port->bulk_in_size = buffer_size; |
925 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
d83b4053 JH |
926 | |
927 | for (j = 0; j < ARRAY_SIZE(port->read_urbs); ++j) { | |
928 | set_bit(j, &port->read_urbs_free); | |
929 | port->read_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); | |
930 | if (!port->read_urbs[j]) { | |
92931d24 | 931 | dev_err(ddev, "No free urbs available\n"); |
d83b4053 JH |
932 | goto probe_error; |
933 | } | |
934 | port->bulk_in_buffers[j] = kmalloc(buffer_size, | |
935 | GFP_KERNEL); | |
936 | if (!port->bulk_in_buffers[j]) { | |
92931d24 | 937 | dev_err(ddev, "Couldn't allocate bulk_in_buffer\n"); |
d83b4053 JH |
938 | goto probe_error; |
939 | } | |
940 | usb_fill_bulk_urb(port->read_urbs[j], dev, | |
941 | usb_rcvbulkpipe(dev, | |
a8d6f0a9 | 942 | endpoint->bEndpointAddress), |
d83b4053 JH |
943 | port->bulk_in_buffers[j], buffer_size, |
944 | serial->type->read_bulk_callback, | |
945 | port); | |
946 | } | |
947 | ||
948 | port->read_urb = port->read_urbs[0]; | |
949 | port->bulk_in_buffer = port->bulk_in_buffers[0]; | |
1da177e4 LT |
950 | } |
951 | ||
952 | for (i = 0; i < num_bulk_out; ++i) { | |
953 | endpoint = bulk_out_endpoint[i]; | |
954 | port = serial->port[i]; | |
119eecc8 | 955 | if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL)) |
8e8dce06 | 956 | goto probe_error; |
bbcb2b90 JH |
957 | buffer_size = serial->type->bulk_out_size; |
958 | if (!buffer_size) | |
29cc8897 | 959 | buffer_size = usb_endpoint_maxp(endpoint); |
1da177e4 LT |
960 | port->bulk_out_size = buffer_size; |
961 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
1ce7b934 | 962 | |
27c7acf2 JH |
963 | for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) { |
964 | set_bit(j, &port->write_urbs_free); | |
965 | port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); | |
966 | if (!port->write_urbs[j]) { | |
92931d24 | 967 | dev_err(ddev, "No free urbs available\n"); |
27c7acf2 JH |
968 | goto probe_error; |
969 | } | |
970 | port->bulk_out_buffers[j] = kmalloc(buffer_size, | |
971 | GFP_KERNEL); | |
972 | if (!port->bulk_out_buffers[j]) { | |
92931d24 | 973 | dev_err(ddev, "Couldn't allocate bulk_out_buffer\n"); |
27c7acf2 JH |
974 | goto probe_error; |
975 | } | |
976 | usb_fill_bulk_urb(port->write_urbs[j], dev, | |
977 | usb_sndbulkpipe(dev, | |
978 | endpoint->bEndpointAddress), | |
979 | port->bulk_out_buffers[j], buffer_size, | |
980 | serial->type->write_bulk_callback, | |
981 | port); | |
982 | } | |
1ce7b934 JH |
983 | |
984 | port->write_urb = port->write_urbs[0]; | |
985 | port->bulk_out_buffer = port->bulk_out_buffers[0]; | |
1da177e4 LT |
986 | } |
987 | ||
988 | if (serial->type->read_int_callback) { | |
989 | for (i = 0; i < num_interrupt_in; ++i) { | |
990 | endpoint = interrupt_in_endpoint[i]; | |
991 | port = serial->port[i]; | |
992 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
993 | if (!port->interrupt_in_urb) { | |
92931d24 | 994 | dev_err(ddev, "No free urbs available\n"); |
1da177e4 LT |
995 | goto probe_error; |
996 | } | |
29cc8897 | 997 | buffer_size = usb_endpoint_maxp(endpoint); |
a8d6f0a9 AC |
998 | port->interrupt_in_endpointAddress = |
999 | endpoint->bEndpointAddress; | |
1000 | port->interrupt_in_buffer = kmalloc(buffer_size, | |
1001 | GFP_KERNEL); | |
1da177e4 | 1002 | if (!port->interrupt_in_buffer) { |
92931d24 | 1003 | dev_err(ddev, "Couldn't allocate interrupt_in_buffer\n"); |
1da177e4 LT |
1004 | goto probe_error; |
1005 | } | |
a8d6f0a9 AC |
1006 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
1007 | usb_rcvintpipe(dev, | |
1008 | endpoint->bEndpointAddress), | |
1009 | port->interrupt_in_buffer, buffer_size, | |
1010 | serial->type->read_int_callback, port, | |
1011 | endpoint->bInterval); | |
1da177e4 LT |
1012 | } |
1013 | } else if (num_interrupt_in) { | |
92931d24 | 1014 | dev_dbg(ddev, "The device claims to support interrupt in transfers, but read_int_callback is not defined\n"); |
1da177e4 | 1015 | } |
a8d6f0a9 | 1016 | |
1da177e4 LT |
1017 | if (serial->type->write_int_callback) { |
1018 | for (i = 0; i < num_interrupt_out; ++i) { | |
1019 | endpoint = interrupt_out_endpoint[i]; | |
1020 | port = serial->port[i]; | |
1021 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1022 | if (!port->interrupt_out_urb) { | |
92931d24 | 1023 | dev_err(ddev, "No free urbs available\n"); |
1da177e4 LT |
1024 | goto probe_error; |
1025 | } | |
29cc8897 | 1026 | buffer_size = usb_endpoint_maxp(endpoint); |
1da177e4 | 1027 | port->interrupt_out_size = buffer_size; |
a8d6f0a9 AC |
1028 | port->interrupt_out_endpointAddress = |
1029 | endpoint->bEndpointAddress; | |
1030 | port->interrupt_out_buffer = kmalloc(buffer_size, | |
1031 | GFP_KERNEL); | |
1da177e4 | 1032 | if (!port->interrupt_out_buffer) { |
92931d24 | 1033 | dev_err(ddev, "Couldn't allocate interrupt_out_buffer\n"); |
1da177e4 LT |
1034 | goto probe_error; |
1035 | } | |
a8d6f0a9 AC |
1036 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
1037 | usb_sndintpipe(dev, | |
1038 | endpoint->bEndpointAddress), | |
1039 | port->interrupt_out_buffer, buffer_size, | |
1040 | serial->type->write_int_callback, port, | |
1041 | endpoint->bInterval); | |
1da177e4 LT |
1042 | } |
1043 | } else if (num_interrupt_out) { | |
92931d24 | 1044 | dev_dbg(ddev, "The device claims to support interrupt out transfers, but write_int_callback is not defined\n"); |
1da177e4 | 1045 | } |
a8d6f0a9 | 1046 | |
bdce6612 JH |
1047 | usb_set_intfdata(interface, serial); |
1048 | ||
1da177e4 LT |
1049 | /* if this device type has an attach function, call it */ |
1050 | if (type->attach) { | |
a8d6f0a9 | 1051 | retval = type->attach(serial); |
1da177e4 LT |
1052 | if (retval < 0) |
1053 | goto probe_error; | |
a4720c65 | 1054 | serial->attached = 1; |
1da177e4 | 1055 | if (retval > 0) { |
a8d6f0a9 AC |
1056 | /* quietly accept this device, but don't bind to a |
1057 | serial port as it's about to disappear */ | |
0a3c8549 | 1058 | serial->num_ports = 0; |
1da177e4 LT |
1059 | goto exit; |
1060 | } | |
a4720c65 AS |
1061 | } else { |
1062 | serial->attached = 1; | |
1da177e4 LT |
1063 | } |
1064 | ||
a65a6f14 JH |
1065 | /* Avoid race with tty_open and serial_install by setting the |
1066 | * disconnected flag and not clearing it until all ports have been | |
1067 | * registered. | |
1068 | */ | |
1069 | serial->disconnected = 1; | |
1070 | ||
a8d6f0a9 | 1071 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
92931d24 | 1072 | dev_err(ddev, "No more free serial devices\n"); |
34ef50e5 ON |
1073 | goto probe_error; |
1074 | } | |
c744f99e | 1075 | serial->minor = minor; |
34ef50e5 | 1076 | |
1da177e4 LT |
1077 | /* register all of the individual ports with the driver core */ |
1078 | for (i = 0; i < num_ports; ++i) { | |
1079 | port = serial->port[i]; | |
0031a06e | 1080 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
92931d24 | 1081 | dev_dbg(ddev, "registering %s", dev_name(&port->dev)); |
a7a6b79b ML |
1082 | device_enable_async_suspend(&port->dev); |
1083 | ||
41bd34dd | 1084 | retval = device_add(&port->dev); |
891a3b1f | 1085 | if (retval) |
92931d24 | 1086 | dev_err(ddev, "Error registering port device, continuing\n"); |
1da177e4 LT |
1087 | } |
1088 | ||
a65a6f14 JH |
1089 | serial->disconnected = 0; |
1090 | ||
3033bc8d | 1091 | usb_serial_console_init(minor); |
1da177e4 | 1092 | exit: |
d92a3ca6 | 1093 | module_put(type->driver.owner); |
1da177e4 LT |
1094 | return 0; |
1095 | ||
1096 | probe_error: | |
41bd34dd | 1097 | usb_serial_put(serial); |
d92a3ca6 | 1098 | module_put(type->driver.owner); |
1da177e4 LT |
1099 | return -EIO; |
1100 | } | |
1101 | ||
32078f91 | 1102 | static void usb_serial_disconnect(struct usb_interface *interface) |
1da177e4 LT |
1103 | { |
1104 | int i; | |
a8d6f0a9 | 1105 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1106 | struct device *dev = &interface->dev; |
1107 | struct usb_serial_port *port; | |
1108 | ||
73e487fd | 1109 | usb_serial_console_disconnect(serial); |
1da177e4 | 1110 | |
a1cd7e99 | 1111 | mutex_lock(&serial->disc_mutex); |
a1cd7e99 ON |
1112 | /* must set a flag, to signal subdrivers */ |
1113 | serial->disconnected = 1; | |
2d93148a AS |
1114 | mutex_unlock(&serial->disc_mutex); |
1115 | ||
a1cd7e99 ON |
1116 | for (i = 0; i < serial->num_ports; ++i) { |
1117 | port = serial->port[i]; | |
1118 | if (port) { | |
4a90f09b AC |
1119 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1120 | if (tty) { | |
d2b39182 | 1121 | tty_vhangup(tty); |
4a90f09b AC |
1122 | tty_kref_put(tty); |
1123 | } | |
a1cd7e99 | 1124 | kill_traffic(port); |
2d93148a | 1125 | cancel_work_sync(&port->work); |
891a3b1f | 1126 | if (device_is_registered(&port->dev)) |
c706ebdf | 1127 | device_del(&port->dev); |
2d93148a AS |
1128 | } |
1129 | } | |
f9c99bb8 | 1130 | serial->type->disconnect(serial); |
2d93148a | 1131 | |
41bd34dd | 1132 | /* let the last holder of this object cause it to be cleaned up */ |
a1cd7e99 | 1133 | usb_serial_put(serial); |
1da177e4 LT |
1134 | dev_info(dev, "device disconnected\n"); |
1135 | } | |
1136 | ||
ec22559e ON |
1137 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1138 | { | |
1139 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1140 | struct usb_serial_port *port; | |
1141 | int i, r = 0; | |
1142 | ||
f8bece8d ON |
1143 | serial->suspending = 1; |
1144 | ||
81e5b23c ON |
1145 | if (serial->type->suspend) { |
1146 | r = serial->type->suspend(serial, message); | |
a5f6005d ON |
1147 | if (r < 0) { |
1148 | serial->suspending = 0; | |
81e5b23c | 1149 | goto err_out; |
a5f6005d | 1150 | } |
81e5b23c ON |
1151 | } |
1152 | ||
e31c1880 ON |
1153 | for (i = 0; i < serial->num_ports; ++i) { |
1154 | port = serial->port[i]; | |
1155 | if (port) | |
1156 | kill_traffic(port); | |
ec22559e ON |
1157 | } |
1158 | ||
81e5b23c | 1159 | err_out: |
ec22559e ON |
1160 | return r; |
1161 | } | |
1162 | EXPORT_SYMBOL(usb_serial_suspend); | |
1163 | ||
1164 | int usb_serial_resume(struct usb_interface *intf) | |
1165 | { | |
1166 | struct usb_serial *serial = usb_get_intfdata(intf); | |
c49cfa91 | 1167 | int rv; |
ec22559e | 1168 | |
f8bece8d | 1169 | serial->suspending = 0; |
8abaee23 | 1170 | if (serial->type->resume) |
c49cfa91 ON |
1171 | rv = serial->type->resume(serial); |
1172 | else | |
1173 | rv = usb_serial_generic_resume(serial); | |
f8bece8d | 1174 | |
c49cfa91 | 1175 | return rv; |
ec22559e ON |
1176 | } |
1177 | EXPORT_SYMBOL(usb_serial_resume); | |
1178 | ||
7186364e GKH |
1179 | static int usb_serial_reset_resume(struct usb_interface *intf) |
1180 | { | |
1181 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1182 | int rv; | |
1183 | ||
1184 | serial->suspending = 0; | |
1185 | if (serial->type->reset_resume) | |
1186 | rv = serial->type->reset_resume(serial); | |
dcd82cd1 GKH |
1187 | else { |
1188 | rv = -EOPNOTSUPP; | |
1189 | intf->needs_binding = 1; | |
1190 | } | |
7186364e GKH |
1191 | |
1192 | return rv; | |
1193 | } | |
1194 | ||
b68e31d0 | 1195 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1196 | .open = serial_open, |
1197 | .close = serial_close, | |
1198 | .write = serial_write, | |
3e1f4901 | 1199 | .hangup = serial_hangup, |
1da177e4 LT |
1200 | .write_room = serial_write_room, |
1201 | .ioctl = serial_ioctl, | |
1202 | .set_termios = serial_set_termios, | |
1203 | .throttle = serial_throttle, | |
1204 | .unthrottle = serial_unthrottle, | |
1205 | .break_ctl = serial_break, | |
1206 | .chars_in_buffer = serial_chars_in_buffer, | |
1da177e4 LT |
1207 | .tiocmget = serial_tiocmget, |
1208 | .tiocmset = serial_tiocmset, | |
3e1f4901 JH |
1209 | .get_icount = serial_get_icount, |
1210 | .cleanup = serial_cleanup, | |
1211 | .install = serial_install, | |
6fd69d3c | 1212 | .proc_fops = &serial_proc_fops, |
1da177e4 LT |
1213 | }; |
1214 | ||
335f8514 | 1215 | |
1da177e4 LT |
1216 | struct tty_driver *usb_serial_tty_driver; |
1217 | ||
32078f91 GKH |
1218 | /* Driver structure we register with the USB core */ |
1219 | static struct usb_driver usb_serial_driver = { | |
1220 | .name = "usbserial", | |
1221 | .probe = usb_serial_probe, | |
1222 | .disconnect = usb_serial_disconnect, | |
1223 | .suspend = usb_serial_suspend, | |
1224 | .resume = usb_serial_resume, | |
1225 | .no_dynamic_id = 1, | |
1226 | .supports_autosuspend = 1, | |
1227 | }; | |
1228 | ||
1da177e4 LT |
1229 | static int __init usb_serial_init(void) |
1230 | { | |
1231 | int i; | |
1232 | int result; | |
1233 | ||
1234 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1235 | if (!usb_serial_tty_driver) | |
1236 | return -ENOMEM; | |
1237 | ||
1238 | /* Initialize our global data */ | |
a8d6f0a9 | 1239 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
1da177e4 | 1240 | serial_table[i] = NULL; |
1da177e4 LT |
1241 | |
1242 | result = bus_register(&usb_serial_bus_type); | |
1243 | if (result) { | |
92931d24 | 1244 | pr_err("%s - registering bus driver failed\n", __func__); |
1da177e4 LT |
1245 | goto exit_bus; |
1246 | } | |
1247 | ||
1da177e4 | 1248 | usb_serial_tty_driver->driver_name = "usbserial"; |
3e1f4901 | 1249 | usb_serial_tty_driver->name = "ttyUSB"; |
1da177e4 LT |
1250 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; |
1251 | usb_serial_tty_driver->minor_start = 0; | |
1252 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1253 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1254 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1255 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1256 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1257 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1258 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1259 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1260 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1261 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1262 | result = tty_register_driver(usb_serial_tty_driver); | |
1263 | if (result) { | |
92931d24 | 1264 | pr_err("%s - tty_register_driver failed\n", __func__); |
1da177e4 LT |
1265 | goto exit_reg_driver; |
1266 | } | |
1267 | ||
1268 | /* register the USB driver */ | |
1269 | result = usb_register(&usb_serial_driver); | |
1270 | if (result < 0) { | |
92931d24 | 1271 | pr_err("%s - usb_register failed\n", __func__); |
1da177e4 LT |
1272 | goto exit_tty; |
1273 | } | |
1274 | ||
06299db3 | 1275 | /* register the generic driver, if we should */ |
3033bc8d | 1276 | result = usb_serial_generic_register(); |
06299db3 | 1277 | if (result < 0) { |
92931d24 | 1278 | pr_err("%s - registering generic driver failed\n", __func__); |
06299db3 GKH |
1279 | goto exit_generic; |
1280 | } | |
1281 | ||
1da177e4 LT |
1282 | return result; |
1283 | ||
06299db3 GKH |
1284 | exit_generic: |
1285 | usb_deregister(&usb_serial_driver); | |
1286 | ||
1da177e4 LT |
1287 | exit_tty: |
1288 | tty_unregister_driver(usb_serial_tty_driver); | |
1289 | ||
1290 | exit_reg_driver: | |
1da177e4 LT |
1291 | bus_unregister(&usb_serial_bus_type); |
1292 | ||
1293 | exit_bus: | |
92931d24 | 1294 | pr_err("%s - returning with error %d\n", __func__, result); |
1da177e4 LT |
1295 | put_tty_driver(usb_serial_tty_driver); |
1296 | return result; | |
1297 | } | |
1298 | ||
1299 | ||
1300 | static void __exit usb_serial_exit(void) | |
1301 | { | |
1302 | usb_serial_console_exit(); | |
1303 | ||
1304 | usb_serial_generic_deregister(); | |
1305 | ||
1306 | usb_deregister(&usb_serial_driver); | |
1307 | tty_unregister_driver(usb_serial_tty_driver); | |
1308 | put_tty_driver(usb_serial_tty_driver); | |
1309 | bus_unregister(&usb_serial_bus_type); | |
1310 | } | |
1311 | ||
1312 | ||
1313 | module_init(usb_serial_init); | |
1314 | module_exit(usb_serial_exit); | |
1315 | ||
1316 | #define set_to_generic_if_null(type, function) \ | |
1317 | do { \ | |
1318 | if (!type->function) { \ | |
1319 | type->function = usb_serial_generic_##function; \ | |
92931d24 | 1320 | pr_debug("Had to override the " #function \ |
a8d6f0a9 | 1321 | " usb serial operation with the generic one.");\ |
1da177e4 LT |
1322 | } \ |
1323 | } while (0) | |
1324 | ||
ea65370d | 1325 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1326 | { |
1327 | set_to_generic_if_null(device, open); | |
1328 | set_to_generic_if_null(device, write); | |
1329 | set_to_generic_if_null(device, close); | |
1330 | set_to_generic_if_null(device, write_room); | |
1331 | set_to_generic_if_null(device, chars_in_buffer); | |
1332 | set_to_generic_if_null(device, read_bulk_callback); | |
1333 | set_to_generic_if_null(device, write_bulk_callback); | |
f9c99bb8 AS |
1334 | set_to_generic_if_null(device, disconnect); |
1335 | set_to_generic_if_null(device, release); | |
23154320 | 1336 | set_to_generic_if_null(device, process_read_urb); |
eaa3bcb0 | 1337 | set_to_generic_if_null(device, prepare_write_buffer); |
1da177e4 LT |
1338 | } |
1339 | ||
f799e767 | 1340 | static int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 LT |
1341 | { |
1342 | int retval; | |
1343 | ||
e4abe665 DY |
1344 | if (usb_disabled()) |
1345 | return -ENODEV; | |
1346 | ||
ea65370d | 1347 | fixup_generic(driver); |
1da177e4 | 1348 | |
269bda1c GKH |
1349 | if (!driver->description) |
1350 | driver->description = driver->driver.name; | |
5620b5f7 AS |
1351 | if (!driver->usb_driver) { |
1352 | WARN(1, "Serial driver %s has no usb_driver\n", | |
1353 | driver->description); | |
1354 | return -EINVAL; | |
1355 | } | |
269bda1c | 1356 | |
1da177e4 | 1357 | /* Add this device to our list of devices */ |
0daeed38 | 1358 | mutex_lock(&table_lock); |
ea65370d | 1359 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1360 | |
ea65370d | 1361 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1362 | if (retval) { |
92931d24 | 1363 | pr_err("problem %d when registering driver %s\n", retval, driver->description); |
ea65370d | 1364 | list_del(&driver->driver_list); |
a8d6f0a9 | 1365 | } else |
ee42f6c9 | 1366 | pr_info("USB Serial support registered for %s\n", driver->description); |
1da177e4 | 1367 | |
0daeed38 | 1368 | mutex_unlock(&table_lock); |
1da177e4 LT |
1369 | return retval; |
1370 | } | |
1371 | ||
f799e767 | 1372 | static void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1373 | { |
ee42f6c9 | 1374 | pr_info("USB Serial deregistering driver %s\n", device->description); |
0daeed38 | 1375 | mutex_lock(&table_lock); |
1da177e4 LT |
1376 | list_del(&device->driver_list); |
1377 | usb_serial_bus_deregister(device); | |
0daeed38 | 1378 | mutex_unlock(&table_lock); |
1da177e4 | 1379 | } |
1da177e4 | 1380 | |
765e0ba6 AS |
1381 | /** |
1382 | * usb_serial_register_drivers - register drivers for a usb-serial module | |
765e0ba6 | 1383 | * @serial_drivers: NULL-terminated array of pointers to drivers to be registered |
68e24113 GKH |
1384 | * @name: name of the usb_driver for this set of @serial_drivers |
1385 | * @id_table: list of all devices this @serial_drivers set binds to | |
765e0ba6 | 1386 | * |
68e24113 GKH |
1387 | * Registers all the drivers in the @serial_drivers array, and dynamically |
1388 | * creates a struct usb_driver with the name @name and id_table of @id_table. | |
765e0ba6 | 1389 | */ |
68e24113 GKH |
1390 | int usb_serial_register_drivers(struct usb_serial_driver *const serial_drivers[], |
1391 | const char *name, | |
1392 | const struct usb_device_id *id_table) | |
765e0ba6 AS |
1393 | { |
1394 | int rc; | |
68e24113 | 1395 | struct usb_driver *udriver; |
765e0ba6 AS |
1396 | struct usb_serial_driver * const *sd; |
1397 | ||
1398 | /* | |
1399 | * udriver must be registered before any of the serial drivers, | |
1400 | * because the store_new_id() routine for the serial drivers (in | |
1401 | * bus.c) probes udriver. | |
1402 | * | |
1403 | * Performance hack: We don't want udriver to be probed until | |
1404 | * the serial drivers are registered, because the probe would | |
1405 | * simply fail for lack of a matching serial driver. | |
68e24113 | 1406 | * So we leave udriver's id_table set to NULL until we are all set. |
5cbe61c5 AS |
1407 | * |
1408 | * Suspend/resume support is implemented in the usb-serial core, | |
1409 | * so fill in the PM-related fields in udriver. | |
765e0ba6 | 1410 | */ |
68e24113 GKH |
1411 | udriver = kzalloc(sizeof(*udriver), GFP_KERNEL); |
1412 | if (!udriver) | |
1413 | return -ENOMEM; | |
765e0ba6 | 1414 | |
68e24113 | 1415 | udriver->name = name; |
765e0ba6 | 1416 | udriver->no_dynamic_id = 1; |
5cbe61c5 AS |
1417 | udriver->supports_autosuspend = 1; |
1418 | udriver->suspend = usb_serial_suspend; | |
1419 | udriver->resume = usb_serial_resume; | |
5026bb07 | 1420 | udriver->probe = usb_serial_probe; |
32078f91 | 1421 | udriver->disconnect = usb_serial_disconnect; |
7186364e GKH |
1422 | |
1423 | /* we only set the reset_resume field if the serial_driver has one */ | |
1424 | for (sd = serial_drivers; *sd; ++sd) { | |
44b0f083 | 1425 | if ((*sd)->reset_resume) { |
7186364e GKH |
1426 | udriver->reset_resume = usb_serial_reset_resume; |
1427 | break; | |
44b0f083 | 1428 | } |
7186364e GKH |
1429 | } |
1430 | ||
765e0ba6 AS |
1431 | rc = usb_register(udriver); |
1432 | if (rc) | |
1433 | return rc; | |
1434 | ||
1435 | for (sd = serial_drivers; *sd; ++sd) { | |
1436 | (*sd)->usb_driver = udriver; | |
1437 | rc = usb_serial_register(*sd); | |
1438 | if (rc) | |
1439 | goto failed; | |
1440 | } | |
1441 | ||
68e24113 GKH |
1442 | /* Now set udriver's id_table and look for matches */ |
1443 | udriver->id_table = id_table; | |
765e0ba6 AS |
1444 | rc = driver_attach(&udriver->drvwrap.driver); |
1445 | return 0; | |
1446 | ||
1447 | failed: | |
1448 | while (sd-- > serial_drivers) | |
1449 | usb_serial_deregister(*sd); | |
1450 | usb_deregister(udriver); | |
1451 | return rc; | |
1452 | } | |
1453 | EXPORT_SYMBOL_GPL(usb_serial_register_drivers); | |
1454 | ||
1455 | /** | |
1456 | * usb_serial_deregister_drivers - deregister drivers for a usb-serial module | |
765e0ba6 AS |
1457 | * @serial_drivers: NULL-terminated array of pointers to drivers to be deregistered |
1458 | * | |
68e24113 GKH |
1459 | * Deregisters all the drivers in the @serial_drivers array and deregisters and |
1460 | * frees the struct usb_driver that was created by the call to | |
1461 | * usb_serial_register_drivers(). | |
765e0ba6 | 1462 | */ |
68e24113 | 1463 | void usb_serial_deregister_drivers(struct usb_serial_driver *const serial_drivers[]) |
765e0ba6 | 1464 | { |
68e24113 GKH |
1465 | struct usb_driver *udriver = (*serial_drivers)->usb_driver; |
1466 | ||
765e0ba6 AS |
1467 | for (; *serial_drivers; ++serial_drivers) |
1468 | usb_serial_deregister(*serial_drivers); | |
1469 | usb_deregister(udriver); | |
68e24113 | 1470 | kfree(udriver); |
765e0ba6 AS |
1471 | } |
1472 | EXPORT_SYMBOL_GPL(usb_serial_deregister_drivers); | |
1da177e4 LT |
1473 | |
1474 | /* Module information */ | |
a8d6f0a9 AC |
1475 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1476 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1477 | MODULE_LICENSE("GPL"); |