Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * USB Serial Converter driver | |
3 | * | |
659597b7 | 4 | * Copyright (C) 2009 - 2013 Johan Hovold (jhovold@gmail.com) |
7186364e | 5 | * Copyright (C) 1999 - 2012 Greg Kroah-Hartman (greg@kroah.com) |
1da177e4 LT |
6 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
7 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License version | |
11 | * 2 as published by the Free Software Foundation. | |
12 | * | |
502b95c1 | 13 | * This driver was originally based on the ACM driver by Armin Fuerst (which was |
1da177e4 LT |
14 | * based on a driver by Brad Keryan) |
15 | * | |
a8d6f0a9 AC |
16 | * See Documentation/usb/usb-serial.txt for more information on using this |
17 | * driver | |
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> |
e5b1e206 | 40 | #include <linux/idr.h> |
1da177e4 LT |
41 | #include "pl2303.h" |
42 | ||
ee42f6c9 | 43 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@linuxfoundation.org>" |
1da177e4 LT |
44 | #define DRIVER_DESC "USB Serial Driver core" |
45 | ||
455b4f7e GKH |
46 | #define USB_SERIAL_TTY_MAJOR 188 |
47 | #define USB_SERIAL_TTY_MINORS 512 /* should be enough for a while */ | |
48 | ||
1da177e4 LT |
49 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead |
50 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
51 | cause the "hotplug" program to pull in whatever module is necessary | |
52 | via modprobe, and modprobe will load usbserial because the serial | |
53 | drivers depend on it. | |
54 | */ | |
55 | ||
e5b1e206 | 56 | static DEFINE_IDR(serial_minors); |
3ddad823 | 57 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
58 | static LIST_HEAD(usb_serial_driver_list); |
59 | ||
8bc2c1b2 | 60 | /* |
e5b1e206 GKH |
61 | * Look up the serial port structure. If it is found and it hasn't been |
62 | * disconnected, return with the parent usb_serial structure's disc_mutex held | |
63 | * and its refcount incremented. Otherwise return NULL. | |
8bc2c1b2 | 64 | */ |
e5b1e206 | 65 | struct usb_serial_port *usb_serial_port_get_by_minor(unsigned minor) |
1da177e4 | 66 | { |
34ef50e5 | 67 | struct usb_serial *serial; |
e5b1e206 | 68 | struct usb_serial_port *port; |
34ef50e5 | 69 | |
3ddad823 | 70 | mutex_lock(&table_lock); |
e5b1e206 GKH |
71 | port = idr_find(&serial_minors, minor); |
72 | if (!port) | |
73 | goto exit; | |
74 | ||
75 | serial = port->serial; | |
76 | mutex_lock(&serial->disc_mutex); | |
77 | if (serial->disconnected) { | |
78 | mutex_unlock(&serial->disc_mutex); | |
79 | port = NULL; | |
80 | } else { | |
81 | kref_get(&serial->kref); | |
8bc2c1b2 | 82 | } |
e5b1e206 | 83 | exit: |
3ddad823 | 84 | mutex_unlock(&table_lock); |
e5b1e206 | 85 | return port; |
1da177e4 LT |
86 | } |
87 | ||
e5b1e206 | 88 | static int allocate_minors(struct usb_serial *serial, int num_ports) |
1da177e4 | 89 | { |
e5b1e206 | 90 | struct usb_serial_port *port; |
1da177e4 | 91 | unsigned int i, j; |
e5b1e206 | 92 | int minor; |
1da177e4 | 93 | |
92931d24 | 94 | dev_dbg(&serial->interface->dev, "%s %d\n", __func__, num_ports); |
1da177e4 | 95 | |
3ddad823 | 96 | mutex_lock(&table_lock); |
e5b1e206 GKH |
97 | for (i = 0; i < num_ports; ++i) { |
98 | port = serial->port[i]; | |
99 | minor = idr_alloc(&serial_minors, port, 0, 0, GFP_KERNEL); | |
100 | if (minor < 0) | |
101 | goto error; | |
102 | port->minor = minor; | |
103 | port->port_number = i; | |
1da177e4 | 104 | } |
e5b1e206 | 105 | serial->minors_reserved = 1; |
3ddad823 | 106 | mutex_unlock(&table_lock); |
e5b1e206 GKH |
107 | return 0; |
108 | error: | |
109 | /* unwind the already allocated minors */ | |
110 | for (j = 0; j < i; ++j) | |
111 | idr_remove(&serial_minors, serial->port[j]->minor); | |
112 | mutex_unlock(&table_lock); | |
113 | return minor; | |
1da177e4 LT |
114 | } |
115 | ||
e5b1e206 | 116 | static void release_minors(struct usb_serial *serial) |
1da177e4 LT |
117 | { |
118 | int i; | |
119 | ||
8bc2c1b2 | 120 | mutex_lock(&table_lock); |
a8d6f0a9 | 121 | for (i = 0; i < serial->num_ports; ++i) |
e5b1e206 | 122 | idr_remove(&serial_minors, serial->port[i]->minor); |
8bc2c1b2 | 123 | mutex_unlock(&table_lock); |
e5b1e206 | 124 | serial->minors_reserved = 0; |
1da177e4 LT |
125 | } |
126 | ||
127 | static void destroy_serial(struct kref *kref) | |
128 | { | |
129 | struct usb_serial *serial; | |
130 | struct usb_serial_port *port; | |
131 | int i; | |
132 | ||
133 | serial = to_usb_serial(kref); | |
134 | ||
521b85ae | 135 | /* return the minor range that this device had */ |
e5b1e206 GKH |
136 | if (serial->minors_reserved) |
137 | release_minors(serial); | |
521b85ae | 138 | |
79b80b8a | 139 | if (serial->attached && serial->type->release) |
a4720c65 | 140 | serial->type->release(serial); |
f9c99bb8 | 141 | |
41bd34dd AS |
142 | /* Now that nothing is using the ports, they can be freed */ |
143 | for (i = 0; i < serial->num_port_pointers; ++i) { | |
f9c99bb8 | 144 | port = serial->port[i]; |
41bd34dd AS |
145 | if (port) { |
146 | port->serial = NULL; | |
f9c99bb8 | 147 | put_device(&port->dev); |
1da177e4 LT |
148 | } |
149 | } | |
150 | ||
d7971051 | 151 | usb_put_intf(serial->interface); |
1da177e4 | 152 | usb_put_dev(serial->dev); |
a8d6f0a9 | 153 | kfree(serial); |
1da177e4 LT |
154 | } |
155 | ||
73e487fd GL |
156 | void usb_serial_put(struct usb_serial *serial) |
157 | { | |
158 | kref_put(&serial->kref, destroy_serial); | |
159 | } | |
160 | ||
1da177e4 LT |
161 | /***************************************************************************** |
162 | * Driver tty interface functions | |
163 | *****************************************************************************/ | |
f5b0953a AS |
164 | |
165 | /** | |
166 | * serial_install - install tty | |
167 | * @driver: the driver (USB in our case) | |
168 | * @tty: the tty being created | |
169 | * | |
170 | * Create the termios objects for this tty. We use the default | |
171 | * USB serial settings but permit them to be overridden by | |
172 | * serial->type->init_termios. | |
cc56cd01 AS |
173 | * |
174 | * This is the first place a new tty gets used. Hence this is where we | |
175 | * acquire references to the usb_serial structure and the driver module, | |
176 | * where we store a pointer to the port, and where we do an autoresume. | |
f278a2f7 | 177 | * All these actions are reversed in serial_cleanup(). |
f5b0953a AS |
178 | */ |
179 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) | |
180 | { | |
181 | int idx = tty->index; | |
182 | struct usb_serial *serial; | |
cc56cd01 AS |
183 | struct usb_serial_port *port; |
184 | int retval = -ENODEV; | |
185 | ||
e5b1e206 GKH |
186 | port = usb_serial_port_get_by_minor(idx); |
187 | if (!port) | |
cc56cd01 AS |
188 | return retval; |
189 | ||
e5b1e206 | 190 | serial = port->serial; |
cc56cd01 AS |
191 | if (!try_module_get(serial->type->driver.owner)) |
192 | goto error_module_get; | |
193 | ||
194 | retval = usb_autopm_get_interface(serial->interface); | |
195 | if (retval) | |
196 | goto error_get_interface; | |
f5b0953a | 197 | |
ca4ff100 | 198 | retval = tty_port_install(&port->port, driver, tty); |
76f82a7a JS |
199 | if (retval) |
200 | goto error_init_termios; | |
201 | ||
cc56cd01 AS |
202 | mutex_unlock(&serial->disc_mutex); |
203 | ||
7e29bb4b AS |
204 | /* allow the driver to update the settings */ |
205 | if (serial->type->init_termios) | |
206 | serial->type->init_termios(tty); | |
207 | ||
cc56cd01 AS |
208 | tty->driver_data = port; |
209 | ||
cc56cd01 AS |
210 | return retval; |
211 | ||
7e29bb4b | 212 | error_init_termios: |
76f82a7a JS |
213 | usb_autopm_put_interface(serial->interface); |
214 | error_get_interface: | |
cc56cd01 AS |
215 | module_put(serial->type->driver.owner); |
216 | error_module_get: | |
cc56cd01 AS |
217 | usb_serial_put(serial); |
218 | mutex_unlock(&serial->disc_mutex); | |
219 | return retval; | |
f5b0953a AS |
220 | } |
221 | ||
395e08da | 222 | static int serial_port_activate(struct tty_port *tport, struct tty_struct *tty) |
1da177e4 | 223 | { |
64bc3979 AC |
224 | struct usb_serial_port *port = |
225 | container_of(tport, struct usb_serial_port, port); | |
320348c8 AS |
226 | struct usb_serial *serial = port->serial; |
227 | int retval; | |
331879fd | 228 | |
64bc3979 AC |
229 | mutex_lock(&serial->disc_mutex); |
230 | if (serial->disconnected) | |
231 | retval = -ENODEV; | |
232 | else | |
233 | retval = port->serial->type->open(tty, port); | |
234 | mutex_unlock(&serial->disc_mutex); | |
3827d876 JH |
235 | |
236 | if (retval < 0) | |
237 | retval = usb_translate_errors(retval); | |
238 | ||
64bc3979 AC |
239 | return retval; |
240 | } | |
1da177e4 | 241 | |
64bc3979 AC |
242 | static int serial_open(struct tty_struct *tty, struct file *filp) |
243 | { | |
244 | struct usb_serial_port *port = tty->driver_data; | |
320348c8 | 245 | |
d12e211d JH |
246 | dev_dbg(tty->dev, "%s\n", __func__); |
247 | ||
64bc3979 | 248 | return tty_port_open(&port->port, tty, filp); |
1da177e4 LT |
249 | } |
250 | ||
335f8514 | 251 | /** |
395e08da | 252 | * serial_port_shutdown - shut down hardware |
e1108a63 | 253 | * @tport: tty port to shut down |
335f8514 | 254 | * |
8a7298d3 PH |
255 | * Shut down a USB serial port. Serialized against activate by the |
256 | * tport mutex and kept to matching open/close pairs | |
e1108a63 | 257 | * of calls by the ASYNCB_INITIALIZED flag. |
8a7298d3 PH |
258 | * |
259 | * Not called if tty is console. | |
335f8514 | 260 | */ |
395e08da | 261 | static void serial_port_shutdown(struct tty_port *tport) |
1da177e4 | 262 | { |
e1108a63 AC |
263 | struct usb_serial_port *port = |
264 | container_of(tport, struct usb_serial_port, port); | |
335f8514 | 265 | struct usb_serial_driver *drv = port->serial->type; |
8a7298d3 | 266 | |
335f8514 AC |
267 | if (drv->close) |
268 | drv->close(port); | |
335f8514 AC |
269 | } |
270 | ||
f5b0953a AS |
271 | static void serial_hangup(struct tty_struct *tty) |
272 | { | |
273 | struct usb_serial_port *port = tty->driver_data; | |
92931d24 | 274 | |
d12e211d JH |
275 | dev_dbg(tty->dev, "%s\n", __func__); |
276 | ||
f5b0953a | 277 | tty_port_hangup(&port->port); |
f5b0953a AS |
278 | } |
279 | ||
280 | static void serial_close(struct tty_struct *tty, struct file *filp) | |
281 | { | |
282 | struct usb_serial_port *port = tty->driver_data; | |
92931d24 | 283 | |
d12e211d JH |
284 | dev_dbg(tty->dev, "%s\n", __func__); |
285 | ||
e1108a63 | 286 | tty_port_close(&port->port, tty, filp); |
f5b0953a AS |
287 | } |
288 | ||
335f8514 | 289 | /** |
f278a2f7 | 290 | * serial_cleanup - free resources post close/hangup |
f5b0953a | 291 | * @port: port to free up |
335f8514 | 292 | * |
f5b0953a AS |
293 | * Do the resource freeing and refcount dropping for the port. |
294 | * Avoid freeing the console. | |
4455e344 | 295 | * |
36b3c070 | 296 | * Called asynchronously after the last tty kref is dropped. |
335f8514 | 297 | */ |
f278a2f7 | 298 | static void serial_cleanup(struct tty_struct *tty) |
335f8514 | 299 | { |
4455e344 | 300 | struct usb_serial_port *port = tty->driver_data; |
335f8514 AC |
301 | struct usb_serial *serial; |
302 | struct module *owner; | |
303 | ||
d12e211d JH |
304 | dev_dbg(tty->dev, "%s\n", __func__); |
305 | ||
f5b0953a AS |
306 | /* The console is magical. Do not hang up the console hardware |
307 | * or there will be tears. | |
308 | */ | |
bd5afa9e | 309 | if (port->port.console) |
335f8514 AC |
310 | return; |
311 | ||
cc56cd01 AS |
312 | tty->driver_data = NULL; |
313 | ||
335f8514 AC |
314 | serial = port->serial; |
315 | owner = serial->type->driver.owner; | |
41bd34dd | 316 | |
335f8514 AC |
317 | mutex_lock(&serial->disc_mutex); |
318 | if (!serial->disconnected) | |
319 | usb_autopm_put_interface(serial->interface); | |
320 | mutex_unlock(&serial->disc_mutex); | |
41bd34dd | 321 | |
2d93148a | 322 | usb_serial_put(serial); |
335f8514 AC |
323 | module_put(owner); |
324 | } | |
325 | ||
a8d6f0a9 AC |
326 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
327 | int count) | |
1da177e4 | 328 | { |
81671ddb | 329 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 330 | int retval = -ENODEV; |
1da177e4 | 331 | |
f34d7a5b | 332 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
333 | goto exit; |
334 | ||
d12e211d | 335 | dev_dbg(tty->dev, "%s - %d byte(s)\n", __func__, count); |
1da177e4 | 336 | |
95da310e | 337 | retval = port->serial->type->write(tty, port, buf, count); |
c6249ff7 JH |
338 | if (retval < 0) |
339 | retval = usb_translate_errors(retval); | |
1da177e4 LT |
340 | exit: |
341 | return retval; | |
342 | } | |
343 | ||
a8d6f0a9 | 344 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 345 | { |
81671ddb | 346 | struct usb_serial_port *port = tty->driver_data; |
92931d24 | 347 | |
d12e211d | 348 | dev_dbg(tty->dev, "%s\n", __func__); |
9993b42b | 349 | |
95da310e | 350 | return port->serial->type->write_room(tty); |
1da177e4 LT |
351 | } |
352 | ||
a8d6f0a9 | 353 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 354 | { |
81671ddb | 355 | struct usb_serial_port *port = tty->driver_data; |
810360a0 | 356 | struct usb_serial *serial = port->serial; |
92931d24 | 357 | |
d12e211d | 358 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 359 | |
810360a0 | 360 | if (serial->disconnected) |
4746b6c6 | 361 | return 0; |
810360a0 | 362 | |
4746b6c6 | 363 | return serial->type->chars_in_buffer(tty); |
1da177e4 LT |
364 | } |
365 | ||
0693196f JH |
366 | static void serial_wait_until_sent(struct tty_struct *tty, int timeout) |
367 | { | |
368 | struct usb_serial_port *port = tty->driver_data; | |
369 | struct usb_serial *serial = port->serial; | |
370 | ||
371 | dev_dbg(tty->dev, "%s\n", __func__); | |
372 | ||
373 | if (!port->serial->type->wait_until_sent) | |
374 | return; | |
375 | ||
376 | mutex_lock(&serial->disc_mutex); | |
377 | if (!serial->disconnected) | |
378 | port->serial->type->wait_until_sent(tty, timeout); | |
379 | mutex_unlock(&serial->disc_mutex); | |
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 | 385 | |
d12e211d | 386 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 387 | |
1da177e4 | 388 | if (port->serial->type->throttle) |
95da310e | 389 | port->serial->type->throttle(tty); |
1da177e4 LT |
390 | } |
391 | ||
a8d6f0a9 | 392 | static void serial_unthrottle(struct tty_struct *tty) |
1da177e4 | 393 | { |
81671ddb | 394 | struct usb_serial_port *port = tty->driver_data; |
92931d24 | 395 | |
d12e211d | 396 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 397 | |
1da177e4 | 398 | if (port->serial->type->unthrottle) |
95da310e | 399 | port->serial->type->unthrottle(tty); |
1da177e4 LT |
400 | } |
401 | ||
6caa76b7 | 402 | static int serial_ioctl(struct tty_struct *tty, |
a8d6f0a9 | 403 | unsigned int cmd, unsigned long arg) |
1da177e4 | 404 | { |
81671ddb | 405 | struct usb_serial_port *port = tty->driver_data; |
f4488035 | 406 | int retval = -ENOIOCTLCMD; |
1da177e4 | 407 | |
4d5147ec | 408 | dev_dbg(tty->dev, "%s - cmd 0x%04x\n", __func__, cmd); |
1da177e4 | 409 | |
143d9d96 JH |
410 | switch (cmd) { |
411 | case TIOCMIWAIT: | |
412 | if (port->serial->type->tiocmiwait) | |
413 | retval = port->serial->type->tiocmiwait(tty, arg); | |
414 | break; | |
415 | default: | |
416 | if (port->serial->type->ioctl) | |
417 | retval = port->serial->type->ioctl(tty, cmd, arg); | |
143d9d96 | 418 | } |
1da177e4 | 419 | |
1da177e4 LT |
420 | return retval; |
421 | } | |
422 | ||
a8d6f0a9 | 423 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 424 | { |
81671ddb | 425 | struct usb_serial_port *port = tty->driver_data; |
92931d24 | 426 | |
d12e211d | 427 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 428 | |
1da177e4 | 429 | if (port->serial->type->set_termios) |
95da310e | 430 | port->serial->type->set_termios(tty, port, old); |
33785091 | 431 | else |
adc8d746 | 432 | tty_termios_copy_hw(&tty->termios, old); |
1da177e4 LT |
433 | } |
434 | ||
9e98966c | 435 | static int serial_break(struct tty_struct *tty, int break_state) |
1da177e4 | 436 | { |
81671ddb | 437 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 438 | |
d12e211d | 439 | dev_dbg(tty->dev, "%s\n", __func__); |
1da177e4 | 440 | |
6b447f04 | 441 | if (port->serial->type->break_ctl) |
95da310e | 442 | port->serial->type->break_ctl(tty, break_state); |
9993b42b | 443 | |
9e98966c | 444 | return 0; |
1da177e4 LT |
445 | } |
446 | ||
6fd69d3c | 447 | static int serial_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
448 | { |
449 | struct usb_serial *serial; | |
e5b1e206 | 450 | struct usb_serial_port *port; |
1da177e4 | 451 | int i; |
1da177e4 LT |
452 | char tmp[40]; |
453 | ||
6fd69d3c | 454 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
455b4f7e | 455 | for (i = 0; i < USB_SERIAL_TTY_MINORS; ++i) { |
e5b1e206 GKH |
456 | port = usb_serial_port_get_by_minor(i); |
457 | if (port == NULL) | |
1da177e4 | 458 | continue; |
e5b1e206 | 459 | serial = port->serial; |
1da177e4 | 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 | 470 | seq_printf(m, " num_ports:%d", serial->num_ports); |
e5b1e206 | 471 | seq_printf(m, " port:%d", port->port_number); |
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 | |
d12e211d | 499 | dev_dbg(tty->dev, "%s\n", __func__); |
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 | |
d12e211d | 511 | dev_dbg(tty->dev, "%s\n", __func__); |
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 | ||
d12e211d | 523 | dev_dbg(tty->dev, "%s\n", __func__); |
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 | 545 | |
6aad04f2 | 546 | tty_port_tty_wakeup(&port->port); |
1da177e4 LT |
547 | } |
548 | ||
6a5c821c | 549 | static void usb_serial_port_poison_urbs(struct usb_serial_port *port) |
34f8e761 | 550 | { |
27c7acf2 JH |
551 | int i; |
552 | ||
d83b4053 | 553 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
6a5c821c | 554 | usb_poison_urb(port->read_urbs[i]); |
27c7acf2 | 555 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
6a5c821c JH |
556 | usb_poison_urb(port->write_urbs[i]); |
557 | ||
558 | usb_poison_urb(port->interrupt_in_urb); | |
559 | usb_poison_urb(port->interrupt_out_urb); | |
560 | } | |
561 | ||
562 | static void usb_serial_port_unpoison_urbs(struct usb_serial_port *port) | |
563 | { | |
564 | int i; | |
565 | ||
566 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) | |
567 | usb_unpoison_urb(port->read_urbs[i]); | |
568 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) | |
569 | usb_unpoison_urb(port->write_urbs[i]); | |
570 | ||
571 | usb_unpoison_urb(port->interrupt_in_urb); | |
572 | usb_unpoison_urb(port->interrupt_out_urb); | |
34ef50e5 ON |
573 | } |
574 | ||
69a3d212 | 575 | static void usb_serial_port_release(struct device *dev) |
34ef50e5 | 576 | { |
41bd34dd | 577 | struct usb_serial_port *port = to_usb_serial_port(dev); |
27c7acf2 | 578 | int i; |
41bd34dd | 579 | |
92931d24 | 580 | dev_dbg(dev, "%s\n", __func__); |
41bd34dd | 581 | |
34ef50e5 | 582 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 | 583 | usb_free_urb(port->interrupt_out_urb); |
d83b4053 JH |
584 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
585 | usb_free_urb(port->read_urbs[i]); | |
586 | kfree(port->bulk_in_buffers[i]); | |
587 | } | |
27c7acf2 JH |
588 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) { |
589 | usb_free_urb(port->write_urbs[i]); | |
590 | kfree(port->bulk_out_buffers[i]); | |
591 | } | |
119eecc8 | 592 | kfifo_free(&port->write_fifo); |
1da177e4 LT |
593 | kfree(port->interrupt_in_buffer); |
594 | kfree(port->interrupt_out_buffer); | |
191c5f10 | 595 | tty_port_destroy(&port->port); |
1da177e4 LT |
596 | kfree(port); |
597 | } | |
598 | ||
a8d6f0a9 AC |
599 | static struct usb_serial *create_serial(struct usb_device *dev, |
600 | struct usb_interface *interface, | |
601 | struct usb_serial_driver *driver) | |
1da177e4 LT |
602 | { |
603 | struct usb_serial *serial; | |
604 | ||
80b6ca48 | 605 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
6b03f7f7 | 606 | if (!serial) |
1da177e4 | 607 | return NULL; |
1da177e4 | 608 | serial->dev = usb_get_dev(dev); |
ea65370d | 609 | serial->type = driver; |
d7971051 | 610 | serial->interface = usb_get_intf(interface); |
1da177e4 | 611 | kref_init(&serial->kref); |
a1cd7e99 | 612 | mutex_init(&serial->disc_mutex); |
e5b1e206 | 613 | serial->minors_reserved = 0; |
1da177e4 LT |
614 | |
615 | return serial; | |
616 | } | |
617 | ||
93bacefc | 618 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 619 | struct usb_serial_driver *drv) |
93bacefc GKH |
620 | { |
621 | struct usb_dynid *dynid; | |
622 | ||
623 | spin_lock(&drv->dynids.lock); | |
624 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
625 | if (usb_match_one_id(intf, &dynid->id)) { | |
626 | spin_unlock(&drv->dynids.lock); | |
627 | return &dynid->id; | |
628 | } | |
629 | } | |
630 | spin_unlock(&drv->dynids.lock); | |
631 | return NULL; | |
632 | } | |
633 | ||
634 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
635 | struct usb_interface *intf) | |
636 | { | |
637 | const struct usb_device_id *id; | |
638 | ||
639 | id = usb_match_id(intf, drv->id_table); | |
640 | if (id) { | |
92931d24 | 641 | dev_dbg(&intf->dev, "static descriptor matches\n"); |
93bacefc GKH |
642 | goto exit; |
643 | } | |
644 | id = match_dynamic_id(intf, drv); | |
645 | if (id) | |
92931d24 | 646 | dev_dbg(&intf->dev, "dynamic descriptor matches\n"); |
93bacefc GKH |
647 | exit: |
648 | return id; | |
649 | } | |
650 | ||
0daeed38 | 651 | /* Caller must hold table_lock */ |
a8d6f0a9 AC |
652 | static struct usb_serial_driver *search_serial_device( |
653 | struct usb_interface *iface) | |
1da177e4 | 654 | { |
954c3f8a | 655 | const struct usb_device_id *id = NULL; |
063a2da8 | 656 | struct usb_serial_driver *drv; |
954c3f8a | 657 | struct usb_driver *driver = to_usb_driver(iface->dev.driver); |
1da177e4 | 658 | |
93b1fae4 | 659 | /* Check if the usb id matches a known device */ |
063a2da8 | 660 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
954c3f8a BM |
661 | if (drv->usb_driver == driver) |
662 | id = get_iface_id(drv, iface); | |
93bacefc | 663 | if (id) |
063a2da8 | 664 | return drv; |
1da177e4 LT |
665 | } |
666 | ||
667 | return NULL; | |
668 | } | |
669 | ||
395e08da | 670 | static int serial_port_carrier_raised(struct tty_port *port) |
335f8514 AC |
671 | { |
672 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
673 | struct usb_serial_driver *drv = p->serial->type; | |
3e1f4901 | 674 | |
335f8514 AC |
675 | if (drv->carrier_raised) |
676 | return drv->carrier_raised(p); | |
677 | /* No carrier control - don't block */ | |
3e1f4901 | 678 | return 1; |
335f8514 AC |
679 | } |
680 | ||
395e08da | 681 | static void serial_port_dtr_rts(struct tty_port *port, int on) |
335f8514 AC |
682 | { |
683 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); | |
f5f45304 | 684 | struct usb_serial_driver *drv = p->serial->type; |
3e1f4901 | 685 | |
f5f45304 | 686 | if (drv->dtr_rts) |
335f8514 AC |
687 | drv->dtr_rts(p, on); |
688 | } | |
689 | ||
2deb96b5 JH |
690 | static ssize_t port_number_show(struct device *dev, |
691 | struct device_attribute *attr, char *buf) | |
692 | { | |
693 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
694 | ||
695 | return sprintf(buf, "%u\n", port->port_number); | |
696 | } | |
697 | static DEVICE_ATTR_RO(port_number); | |
698 | ||
699 | static struct attribute *usb_serial_port_attrs[] = { | |
700 | &dev_attr_port_number.attr, | |
701 | NULL | |
702 | }; | |
703 | ATTRIBUTE_GROUPS(usb_serial_port); | |
704 | ||
335f8514 | 705 | static const struct tty_port_operations serial_port_ops = { |
395e08da JH |
706 | .carrier_raised = serial_port_carrier_raised, |
707 | .dtr_rts = serial_port_dtr_rts, | |
708 | .activate = serial_port_activate, | |
709 | .shutdown = serial_port_shutdown, | |
335f8514 AC |
710 | }; |
711 | ||
2edd284b | 712 | static int usb_serial_probe(struct usb_interface *interface, |
1da177e4 LT |
713 | const struct usb_device_id *id) |
714 | { | |
92931d24 | 715 | struct device *ddev = &interface->dev; |
a8d6f0a9 | 716 | struct usb_device *dev = interface_to_usbdev(interface); |
1da177e4 LT |
717 | struct usb_serial *serial = NULL; |
718 | struct usb_serial_port *port; | |
719 | struct usb_host_interface *iface_desc; | |
720 | struct usb_endpoint_descriptor *endpoint; | |
721 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
722 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
723 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
724 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 725 | struct usb_serial_driver *type = NULL; |
1da177e4 | 726 | int retval; |
1da177e4 LT |
727 | int buffer_size; |
728 | int i; | |
d83b4053 | 729 | int j; |
1da177e4 LT |
730 | int num_interrupt_in = 0; |
731 | int num_interrupt_out = 0; | |
732 | int num_bulk_in = 0; | |
733 | int num_bulk_out = 0; | |
734 | int num_ports = 0; | |
735 | int max_endpoints; | |
736 | ||
0daeed38 | 737 | mutex_lock(&table_lock); |
1da177e4 LT |
738 | type = search_serial_device(interface); |
739 | if (!type) { | |
0daeed38 | 740 | mutex_unlock(&table_lock); |
92931d24 | 741 | dev_dbg(ddev, "none matched\n"); |
1da177e4 LT |
742 | return -ENODEV; |
743 | } | |
744 | ||
0daeed38 AK |
745 | if (!try_module_get(type->driver.owner)) { |
746 | mutex_unlock(&table_lock); | |
92931d24 | 747 | dev_err(ddev, "module get failed, exiting\n"); |
0daeed38 AK |
748 | return -EIO; |
749 | } | |
750 | mutex_unlock(&table_lock); | |
751 | ||
a8d6f0a9 | 752 | serial = create_serial(dev, interface, type); |
1da177e4 | 753 | if (!serial) { |
d92a3ca6 | 754 | module_put(type->driver.owner); |
1da177e4 LT |
755 | return -ENOMEM; |
756 | } | |
757 | ||
758 | /* if this device type has a probe function, call it */ | |
759 | if (type->probe) { | |
760 | const struct usb_device_id *id; | |
761 | ||
93bacefc | 762 | id = get_iface_id(type, interface); |
1da177e4 | 763 | retval = type->probe(serial, id); |
1da177e4 LT |
764 | |
765 | if (retval) { | |
92931d24 | 766 | dev_dbg(ddev, "sub driver rejected device\n"); |
0658a336 | 767 | usb_serial_put(serial); |
d92a3ca6 | 768 | module_put(type->driver.owner); |
1da177e4 LT |
769 | return retval; |
770 | } | |
771 | } | |
772 | ||
773 | /* descriptor matches, let's find the endpoints needed */ | |
774 | /* check out the endpoints */ | |
775 | iface_desc = interface->cur_altsetting; | |
776 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
777 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
778 | |
779 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 | 780 | /* we found a bulk in endpoint */ |
92931d24 | 781 | dev_dbg(ddev, "found bulk in on endpoint %d\n", i); |
d979e9f9 JH |
782 | if (num_bulk_in < MAX_NUM_PORTS) { |
783 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
784 | ++num_bulk_in; | |
785 | } | |
1da177e4 LT |
786 | } |
787 | ||
4fa1bbf5 | 788 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 | 789 | /* we found a bulk out endpoint */ |
92931d24 | 790 | dev_dbg(ddev, "found bulk out on endpoint %d\n", i); |
d979e9f9 JH |
791 | if (num_bulk_out < MAX_NUM_PORTS) { |
792 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
793 | ++num_bulk_out; | |
794 | } | |
1da177e4 | 795 | } |
4fa1bbf5 LFC |
796 | |
797 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 | 798 | /* we found a interrupt in endpoint */ |
92931d24 | 799 | dev_dbg(ddev, "found interrupt in on endpoint %d\n", i); |
d979e9f9 JH |
800 | if (num_interrupt_in < MAX_NUM_PORTS) { |
801 | interrupt_in_endpoint[num_interrupt_in] = | |
802 | endpoint; | |
803 | ++num_interrupt_in; | |
804 | } | |
1da177e4 LT |
805 | } |
806 | ||
4fa1bbf5 | 807 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 | 808 | /* we found an interrupt out endpoint */ |
92931d24 | 809 | dev_dbg(ddev, "found interrupt out on endpoint %d\n", i); |
d979e9f9 JH |
810 | if (num_interrupt_out < MAX_NUM_PORTS) { |
811 | interrupt_out_endpoint[num_interrupt_out] = | |
812 | endpoint; | |
813 | ++num_interrupt_out; | |
814 | } | |
1da177e4 LT |
815 | } |
816 | } | |
817 | ||
818 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
a8d6f0a9 | 819 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
1da177e4 LT |
820 | /* this is needed due to the looney way its endpoints are set up */ |
821 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
822 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
823 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
824 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
825 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
ce816cf9 AB |
826 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
827 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && | |
828 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { | |
1da177e4 LT |
829 | if (interface != dev->actconfig->interface[0]) { |
830 | /* check out the endpoints of the other interface*/ | |
831 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
832 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
833 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 834 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 | 835 | /* we found a interrupt in endpoint */ |
92931d24 | 836 | dev_dbg(ddev, "found interrupt in for Prolific device on separate interface\n"); |
d979e9f9 JH |
837 | if (num_interrupt_in < MAX_NUM_PORTS) { |
838 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
839 | ++num_interrupt_in; | |
840 | } | |
1da177e4 LT |
841 | } |
842 | } | |
843 | } | |
844 | ||
845 | /* Now make sure the PL-2303 is configured correctly. | |
846 | * If not, give up now and hope this hack will work | |
847 | * properly during a later invocation of usb_serial_probe | |
848 | */ | |
849 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
92931d24 | 850 | dev_info(ddev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
0658a336 | 851 | usb_serial_put(serial); |
d92a3ca6 | 852 | module_put(type->driver.owner); |
1da177e4 LT |
853 | return -ENODEV; |
854 | } | |
855 | } | |
856 | /* END HORRIBLE HACK FOR PL2303 */ | |
857 | #endif | |
858 | ||
1da177e4 LT |
859 | #ifdef CONFIG_USB_SERIAL_GENERIC |
860 | if (type == &usb_serial_generic_device) { | |
861 | num_ports = num_bulk_out; | |
862 | if (num_ports == 0) { | |
92931d24 | 863 | dev_err(ddev, "Generic device with no bulk out, not allowed.\n"); |
0658a336 | 864 | usb_serial_put(serial); |
d92a3ca6 | 865 | module_put(type->driver.owner); |
1da177e4 LT |
866 | return -EIO; |
867 | } | |
92931d24 GKH |
868 | dev_info(ddev, "The \"generic\" usb-serial driver is only for testing and one-off prototypes.\n"); |
869 | dev_info(ddev, "Tell linux-usb@vger.kernel.org to add your device to a proper driver.\n"); | |
1da177e4 LT |
870 | } |
871 | #endif | |
872 | if (!num_ports) { | |
873 | /* if this device type has a calc_num_ports function, call it */ | |
d92a3ca6 | 874 | if (type->calc_num_ports) |
a8d6f0a9 | 875 | num_ports = type->calc_num_ports(serial); |
1da177e4 LT |
876 | if (!num_ports) |
877 | num_ports = type->num_ports; | |
878 | } | |
879 | ||
5654699f JH |
880 | if (num_ports > MAX_NUM_PORTS) { |
881 | dev_warn(ddev, "too many ports requested: %d\n", num_ports); | |
882 | num_ports = MAX_NUM_PORTS; | |
883 | } | |
884 | ||
1da177e4 LT |
885 | serial->num_ports = num_ports; |
886 | serial->num_bulk_in = num_bulk_in; | |
887 | serial->num_bulk_out = num_bulk_out; | |
888 | serial->num_interrupt_in = num_interrupt_in; | |
889 | serial->num_interrupt_out = num_interrupt_out; | |
890 | ||
063a2da8 | 891 | /* found all that we need */ |
92931d24 | 892 | dev_info(ddev, "%s converter detected\n", type->description); |
063a2da8 | 893 | |
1da177e4 | 894 | /* create our ports, we need as many as the max endpoints */ |
a8d6f0a9 AC |
895 | /* we don't use num_ports here because some devices have more |
896 | endpoint pairs than ports */ | |
1da177e4 LT |
897 | max_endpoints = max(num_bulk_in, num_bulk_out); |
898 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
899 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
900 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
901 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 | 902 | |
d9a38a87 | 903 | dev_dbg(ddev, "setting up %d port structure(s)\n", max_endpoints); |
1da177e4 | 904 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 905 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
906 | if (!port) |
907 | goto probe_error; | |
4a90f09b | 908 | tty_port_init(&port->port); |
335f8514 | 909 | port->port.ops = &serial_port_ops; |
1da177e4 | 910 | port->serial = serial; |
507ca9bc | 911 | spin_lock_init(&port->lock); |
e1108a63 AC |
912 | /* Keep this for private driver use for the moment but |
913 | should probably go away */ | |
c4028958 | 914 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 | 915 | serial->port[i] = port; |
41bd34dd AS |
916 | port->dev.parent = &interface->dev; |
917 | port->dev.driver = NULL; | |
918 | port->dev.bus = &usb_serial_bus_type; | |
69a3d212 | 919 | port->dev.release = &usb_serial_port_release; |
2deb96b5 | 920 | port->dev.groups = usb_serial_port_groups; |
41bd34dd | 921 | device_initialize(&port->dev); |
1da177e4 LT |
922 | } |
923 | ||
924 | /* set up the endpoint information */ | |
925 | for (i = 0; i < num_bulk_in; ++i) { | |
926 | endpoint = bulk_in_endpoint[i]; | |
927 | port = serial->port[i]; | |
969e3033 | 928 | buffer_size = max_t(int, serial->type->bulk_in_size, |
29cc8897 | 929 | usb_endpoint_maxp(endpoint)); |
1da177e4 LT |
930 | port->bulk_in_size = buffer_size; |
931 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
d83b4053 JH |
932 | |
933 | for (j = 0; j < ARRAY_SIZE(port->read_urbs); ++j) { | |
934 | set_bit(j, &port->read_urbs_free); | |
935 | port->read_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); | |
6b03f7f7 | 936 | if (!port->read_urbs[j]) |
d83b4053 | 937 | goto probe_error; |
d83b4053 JH |
938 | port->bulk_in_buffers[j] = kmalloc(buffer_size, |
939 | GFP_KERNEL); | |
6b03f7f7 | 940 | if (!port->bulk_in_buffers[j]) |
d83b4053 | 941 | goto probe_error; |
d83b4053 JH |
942 | usb_fill_bulk_urb(port->read_urbs[j], dev, |
943 | usb_rcvbulkpipe(dev, | |
a8d6f0a9 | 944 | endpoint->bEndpointAddress), |
d83b4053 JH |
945 | port->bulk_in_buffers[j], buffer_size, |
946 | serial->type->read_bulk_callback, | |
947 | port); | |
948 | } | |
949 | ||
950 | port->read_urb = port->read_urbs[0]; | |
951 | port->bulk_in_buffer = port->bulk_in_buffers[0]; | |
1da177e4 LT |
952 | } |
953 | ||
954 | for (i = 0; i < num_bulk_out; ++i) { | |
955 | endpoint = bulk_out_endpoint[i]; | |
956 | port = serial->port[i]; | |
119eecc8 | 957 | if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL)) |
8e8dce06 | 958 | goto probe_error; |
bc4b1f48 JH |
959 | buffer_size = serial->type->bulk_out_size; |
960 | if (!buffer_size) | |
961 | buffer_size = usb_endpoint_maxp(endpoint); | |
1da177e4 LT |
962 | port->bulk_out_size = buffer_size; |
963 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
1ce7b934 | 964 | |
27c7acf2 JH |
965 | for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) { |
966 | set_bit(j, &port->write_urbs_free); | |
967 | port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); | |
6b03f7f7 | 968 | if (!port->write_urbs[j]) |
27c7acf2 | 969 | goto probe_error; |
27c7acf2 JH |
970 | port->bulk_out_buffers[j] = kmalloc(buffer_size, |
971 | GFP_KERNEL); | |
6b03f7f7 | 972 | if (!port->bulk_out_buffers[j]) |
27c7acf2 | 973 | goto probe_error; |
27c7acf2 JH |
974 | usb_fill_bulk_urb(port->write_urbs[j], dev, |
975 | usb_sndbulkpipe(dev, | |
976 | endpoint->bEndpointAddress), | |
977 | port->bulk_out_buffers[j], buffer_size, | |
978 | serial->type->write_bulk_callback, | |
979 | port); | |
980 | } | |
1ce7b934 JH |
981 | |
982 | port->write_urb = port->write_urbs[0]; | |
983 | port->bulk_out_buffer = port->bulk_out_buffers[0]; | |
1da177e4 LT |
984 | } |
985 | ||
986 | if (serial->type->read_int_callback) { | |
987 | for (i = 0; i < num_interrupt_in; ++i) { | |
988 | endpoint = interrupt_in_endpoint[i]; | |
989 | port = serial->port[i]; | |
990 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
6b03f7f7 | 991 | if (!port->interrupt_in_urb) |
1da177e4 | 992 | goto probe_error; |
29cc8897 | 993 | buffer_size = usb_endpoint_maxp(endpoint); |
a8d6f0a9 AC |
994 | port->interrupt_in_endpointAddress = |
995 | endpoint->bEndpointAddress; | |
996 | port->interrupt_in_buffer = kmalloc(buffer_size, | |
997 | GFP_KERNEL); | |
6b03f7f7 | 998 | if (!port->interrupt_in_buffer) |
1da177e4 | 999 | goto probe_error; |
a8d6f0a9 AC |
1000 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
1001 | usb_rcvintpipe(dev, | |
1002 | endpoint->bEndpointAddress), | |
1003 | port->interrupt_in_buffer, buffer_size, | |
1004 | serial->type->read_int_callback, port, | |
1005 | endpoint->bInterval); | |
1da177e4 LT |
1006 | } |
1007 | } else if (num_interrupt_in) { | |
92931d24 | 1008 | dev_dbg(ddev, "The device claims to support interrupt in transfers, but read_int_callback is not defined\n"); |
1da177e4 | 1009 | } |
a8d6f0a9 | 1010 | |
1da177e4 LT |
1011 | if (serial->type->write_int_callback) { |
1012 | for (i = 0; i < num_interrupt_out; ++i) { | |
1013 | endpoint = interrupt_out_endpoint[i]; | |
1014 | port = serial->port[i]; | |
1015 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
6b03f7f7 | 1016 | if (!port->interrupt_out_urb) |
1da177e4 | 1017 | goto probe_error; |
29cc8897 | 1018 | buffer_size = usb_endpoint_maxp(endpoint); |
1da177e4 | 1019 | port->interrupt_out_size = buffer_size; |
a8d6f0a9 AC |
1020 | port->interrupt_out_endpointAddress = |
1021 | endpoint->bEndpointAddress; | |
1022 | port->interrupt_out_buffer = kmalloc(buffer_size, | |
1023 | GFP_KERNEL); | |
6b03f7f7 | 1024 | if (!port->interrupt_out_buffer) |
1da177e4 | 1025 | goto probe_error; |
a8d6f0a9 AC |
1026 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
1027 | usb_sndintpipe(dev, | |
1028 | endpoint->bEndpointAddress), | |
1029 | port->interrupt_out_buffer, buffer_size, | |
1030 | serial->type->write_int_callback, port, | |
1031 | endpoint->bInterval); | |
1da177e4 LT |
1032 | } |
1033 | } else if (num_interrupt_out) { | |
92931d24 | 1034 | dev_dbg(ddev, "The device claims to support interrupt out transfers, but write_int_callback is not defined\n"); |
1da177e4 | 1035 | } |
a8d6f0a9 | 1036 | |
bdce6612 JH |
1037 | usb_set_intfdata(interface, serial); |
1038 | ||
1da177e4 LT |
1039 | /* if this device type has an attach function, call it */ |
1040 | if (type->attach) { | |
a8d6f0a9 | 1041 | retval = type->attach(serial); |
1da177e4 LT |
1042 | if (retval < 0) |
1043 | goto probe_error; | |
a4720c65 | 1044 | serial->attached = 1; |
1da177e4 | 1045 | if (retval > 0) { |
a8d6f0a9 AC |
1046 | /* quietly accept this device, but don't bind to a |
1047 | serial port as it's about to disappear */ | |
0a3c8549 | 1048 | serial->num_ports = 0; |
1da177e4 LT |
1049 | goto exit; |
1050 | } | |
a4720c65 AS |
1051 | } else { |
1052 | serial->attached = 1; | |
1da177e4 LT |
1053 | } |
1054 | ||
a65a6f14 JH |
1055 | /* Avoid race with tty_open and serial_install by setting the |
1056 | * disconnected flag and not clearing it until all ports have been | |
1057 | * registered. | |
1058 | */ | |
1059 | serial->disconnected = 1; | |
1060 | ||
e5b1e206 GKH |
1061 | if (allocate_minors(serial, num_ports)) { |
1062 | dev_err(ddev, "No more free serial minor numbers\n"); | |
34ef50e5 ON |
1063 | goto probe_error; |
1064 | } | |
1065 | ||
1da177e4 LT |
1066 | /* register all of the individual ports with the driver core */ |
1067 | for (i = 0; i < num_ports; ++i) { | |
1068 | port = serial->port[i]; | |
1143832e | 1069 | dev_set_name(&port->dev, "ttyUSB%d", port->minor); |
d9a38a87 | 1070 | dev_dbg(ddev, "registering %s\n", dev_name(&port->dev)); |
a7a6b79b ML |
1071 | device_enable_async_suspend(&port->dev); |
1072 | ||
41bd34dd | 1073 | retval = device_add(&port->dev); |
891a3b1f | 1074 | if (retval) |
92931d24 | 1075 | dev_err(ddev, "Error registering port device, continuing\n"); |
1da177e4 LT |
1076 | } |
1077 | ||
a65a6f14 JH |
1078 | serial->disconnected = 0; |
1079 | ||
e5b1e206 | 1080 | usb_serial_console_init(serial->port[0]->minor); |
1da177e4 | 1081 | exit: |
d92a3ca6 | 1082 | module_put(type->driver.owner); |
1da177e4 LT |
1083 | return 0; |
1084 | ||
1085 | probe_error: | |
41bd34dd | 1086 | usb_serial_put(serial); |
d92a3ca6 | 1087 | module_put(type->driver.owner); |
1da177e4 LT |
1088 | return -EIO; |
1089 | } | |
1090 | ||
32078f91 | 1091 | static void usb_serial_disconnect(struct usb_interface *interface) |
1da177e4 LT |
1092 | { |
1093 | int i; | |
a8d6f0a9 | 1094 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1095 | struct device *dev = &interface->dev; |
1096 | struct usb_serial_port *port; | |
3fff3b43 | 1097 | struct tty_struct *tty; |
1da177e4 | 1098 | |
73e487fd | 1099 | usb_serial_console_disconnect(serial); |
1da177e4 | 1100 | |
a1cd7e99 | 1101 | mutex_lock(&serial->disc_mutex); |
a1cd7e99 ON |
1102 | /* must set a flag, to signal subdrivers */ |
1103 | serial->disconnected = 1; | |
2d93148a AS |
1104 | mutex_unlock(&serial->disc_mutex); |
1105 | ||
a1cd7e99 ON |
1106 | for (i = 0; i < serial->num_ports; ++i) { |
1107 | port = serial->port[i]; | |
3fff3b43 JH |
1108 | tty = tty_port_tty_get(&port->port); |
1109 | if (tty) { | |
1110 | tty_vhangup(tty); | |
1111 | tty_kref_put(tty); | |
2d93148a | 1112 | } |
3fff3b43 JH |
1113 | usb_serial_port_poison_urbs(port); |
1114 | wake_up_interruptible(&port->port.delta_msr_wait); | |
1115 | cancel_work_sync(&port->work); | |
1116 | if (device_is_registered(&port->dev)) | |
1117 | device_del(&port->dev); | |
2d93148a | 1118 | } |
0f16cfe3 JH |
1119 | if (serial->type->disconnect) |
1120 | serial->type->disconnect(serial); | |
2d93148a | 1121 | |
41bd34dd | 1122 | /* let the last holder of this object cause it to be cleaned up */ |
a1cd7e99 | 1123 | usb_serial_put(serial); |
1da177e4 LT |
1124 | dev_info(dev, "device disconnected\n"); |
1125 | } | |
1126 | ||
ec22559e ON |
1127 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1128 | { | |
1129 | struct usb_serial *serial = usb_get_intfdata(intf); | |
ec22559e ON |
1130 | int i, r = 0; |
1131 | ||
f8bece8d ON |
1132 | serial->suspending = 1; |
1133 | ||
93e4f47f ML |
1134 | /* |
1135 | * serial->type->suspend() MUST return 0 in system sleep context, | |
1136 | * otherwise, the resume callback has to recover device from | |
1137 | * previous suspend failure. | |
1138 | */ | |
81e5b23c ON |
1139 | if (serial->type->suspend) { |
1140 | r = serial->type->suspend(serial, message); | |
a5f6005d ON |
1141 | if (r < 0) { |
1142 | serial->suspending = 0; | |
81e5b23c | 1143 | goto err_out; |
a5f6005d | 1144 | } |
81e5b23c ON |
1145 | } |
1146 | ||
3fff3b43 JH |
1147 | for (i = 0; i < serial->num_ports; ++i) |
1148 | usb_serial_port_poison_urbs(serial->port[i]); | |
81e5b23c | 1149 | err_out: |
ec22559e ON |
1150 | return r; |
1151 | } | |
1152 | EXPORT_SYMBOL(usb_serial_suspend); | |
1153 | ||
6a5c821c JH |
1154 | static void usb_serial_unpoison_port_urbs(struct usb_serial *serial) |
1155 | { | |
6a5c821c JH |
1156 | int i; |
1157 | ||
3fff3b43 JH |
1158 | for (i = 0; i < serial->num_ports; ++i) |
1159 | usb_serial_port_unpoison_urbs(serial->port[i]); | |
6a5c821c JH |
1160 | } |
1161 | ||
ec22559e ON |
1162 | int usb_serial_resume(struct usb_interface *intf) |
1163 | { | |
1164 | struct usb_serial *serial = usb_get_intfdata(intf); | |
c49cfa91 | 1165 | int rv; |
ec22559e | 1166 | |
6a5c821c JH |
1167 | usb_serial_unpoison_port_urbs(serial); |
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 | ||
6a5c821c JH |
1184 | usb_serial_unpoison_port_urbs(serial); |
1185 | ||
7186364e | 1186 | serial->suspending = 0; |
ca0400d2 | 1187 | if (serial->type->reset_resume) { |
7186364e | 1188 | rv = serial->type->reset_resume(serial); |
ca0400d2 | 1189 | } else { |
dcd82cd1 GKH |
1190 | rv = -EOPNOTSUPP; |
1191 | intf->needs_binding = 1; | |
1192 | } | |
7186364e GKH |
1193 | |
1194 | return rv; | |
1195 | } | |
1196 | ||
b68e31d0 | 1197 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1198 | .open = serial_open, |
1199 | .close = serial_close, | |
1200 | .write = serial_write, | |
3e1f4901 | 1201 | .hangup = serial_hangup, |
1da177e4 LT |
1202 | .write_room = serial_write_room, |
1203 | .ioctl = serial_ioctl, | |
1204 | .set_termios = serial_set_termios, | |
1205 | .throttle = serial_throttle, | |
1206 | .unthrottle = serial_unthrottle, | |
1207 | .break_ctl = serial_break, | |
1208 | .chars_in_buffer = serial_chars_in_buffer, | |
0693196f | 1209 | .wait_until_sent = serial_wait_until_sent, |
1da177e4 LT |
1210 | .tiocmget = serial_tiocmget, |
1211 | .tiocmset = serial_tiocmset, | |
3e1f4901 JH |
1212 | .get_icount = serial_get_icount, |
1213 | .cleanup = serial_cleanup, | |
1214 | .install = serial_install, | |
6fd69d3c | 1215 | .proc_fops = &serial_proc_fops, |
1da177e4 LT |
1216 | }; |
1217 | ||
335f8514 | 1218 | |
1da177e4 LT |
1219 | struct tty_driver *usb_serial_tty_driver; |
1220 | ||
32078f91 GKH |
1221 | /* Driver structure we register with the USB core */ |
1222 | static struct usb_driver usb_serial_driver = { | |
1223 | .name = "usbserial", | |
1224 | .probe = usb_serial_probe, | |
1225 | .disconnect = usb_serial_disconnect, | |
1226 | .suspend = usb_serial_suspend, | |
1227 | .resume = usb_serial_resume, | |
1228 | .no_dynamic_id = 1, | |
1229 | .supports_autosuspend = 1, | |
1230 | }; | |
1231 | ||
1da177e4 LT |
1232 | static int __init usb_serial_init(void) |
1233 | { | |
1da177e4 LT |
1234 | int result; |
1235 | ||
455b4f7e | 1236 | usb_serial_tty_driver = alloc_tty_driver(USB_SERIAL_TTY_MINORS); |
1da177e4 LT |
1237 | if (!usb_serial_tty_driver) |
1238 | return -ENOMEM; | |
1239 | ||
1240 | /* Initialize our global data */ | |
1da177e4 LT |
1241 | result = bus_register(&usb_serial_bus_type); |
1242 | if (result) { | |
92931d24 | 1243 | pr_err("%s - registering bus driver failed\n", __func__); |
1da177e4 LT |
1244 | goto exit_bus; |
1245 | } | |
1246 | ||
1da177e4 | 1247 | usb_serial_tty_driver->driver_name = "usbserial"; |
3e1f4901 | 1248 | usb_serial_tty_driver->name = "ttyUSB"; |
455b4f7e | 1249 | usb_serial_tty_driver->major = USB_SERIAL_TTY_MAJOR; |
1da177e4 LT |
1250 | usb_serial_tty_driver->minor_start = 0; |
1251 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1252 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1253 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1254 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1255 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1256 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1257 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1258 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1259 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1260 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1261 | result = tty_register_driver(usb_serial_tty_driver); | |
1262 | if (result) { | |
92931d24 | 1263 | pr_err("%s - tty_register_driver failed\n", __func__); |
1da177e4 LT |
1264 | goto exit_reg_driver; |
1265 | } | |
1266 | ||
1267 | /* register the USB driver */ | |
1268 | result = usb_register(&usb_serial_driver); | |
1269 | if (result < 0) { | |
92931d24 | 1270 | pr_err("%s - usb_register failed\n", __func__); |
1da177e4 LT |
1271 | goto exit_tty; |
1272 | } | |
1273 | ||
06299db3 | 1274 | /* register the generic driver, if we should */ |
3033bc8d | 1275 | result = usb_serial_generic_register(); |
06299db3 | 1276 | if (result < 0) { |
92931d24 | 1277 | pr_err("%s - registering generic driver failed\n", __func__); |
06299db3 GKH |
1278 | goto exit_generic; |
1279 | } | |
1280 | ||
1da177e4 LT |
1281 | return result; |
1282 | ||
06299db3 GKH |
1283 | exit_generic: |
1284 | usb_deregister(&usb_serial_driver); | |
1285 | ||
1da177e4 LT |
1286 | exit_tty: |
1287 | tty_unregister_driver(usb_serial_tty_driver); | |
1288 | ||
1289 | exit_reg_driver: | |
1da177e4 LT |
1290 | bus_unregister(&usb_serial_bus_type); |
1291 | ||
1292 | exit_bus: | |
92931d24 | 1293 | pr_err("%s - returning with error %d\n", __func__, result); |
1da177e4 LT |
1294 | put_tty_driver(usb_serial_tty_driver); |
1295 | return result; | |
1296 | } | |
1297 | ||
1298 | ||
1299 | static void __exit usb_serial_exit(void) | |
1300 | { | |
1301 | usb_serial_console_exit(); | |
1302 | ||
1303 | usb_serial_generic_deregister(); | |
1304 | ||
1305 | usb_deregister(&usb_serial_driver); | |
1306 | tty_unregister_driver(usb_serial_tty_driver); | |
1307 | put_tty_driver(usb_serial_tty_driver); | |
1308 | bus_unregister(&usb_serial_bus_type); | |
1309 | } | |
1310 | ||
1311 | ||
1312 | module_init(usb_serial_init); | |
1313 | module_exit(usb_serial_exit); | |
1314 | ||
1315 | #define set_to_generic_if_null(type, function) \ | |
1316 | do { \ | |
1317 | if (!type->function) { \ | |
1318 | type->function = usb_serial_generic_##function; \ | |
c3452f5e JH |
1319 | pr_debug("%s: using generic " #function "\n", \ |
1320 | type->driver.name); \ | |
1321 | } \ | |
1da177e4 LT |
1322 | } while (0) |
1323 | ||
c3452f5e | 1324 | static void usb_serial_operations_init(struct usb_serial_driver *device) |
1da177e4 LT |
1325 | { |
1326 | set_to_generic_if_null(device, open); | |
1327 | set_to_generic_if_null(device, write); | |
1328 | set_to_generic_if_null(device, close); | |
1329 | set_to_generic_if_null(device, write_room); | |
1330 | set_to_generic_if_null(device, chars_in_buffer); | |
dcf01050 JH |
1331 | if (device->tx_empty) |
1332 | set_to_generic_if_null(device, wait_until_sent); | |
1da177e4 LT |
1333 | set_to_generic_if_null(device, read_bulk_callback); |
1334 | set_to_generic_if_null(device, write_bulk_callback); | |
23154320 | 1335 | set_to_generic_if_null(device, process_read_urb); |
eaa3bcb0 | 1336 | set_to_generic_if_null(device, prepare_write_buffer); |
1da177e4 LT |
1337 | } |
1338 | ||
f799e767 | 1339 | static int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 LT |
1340 | { |
1341 | int retval; | |
1342 | ||
e4abe665 DY |
1343 | if (usb_disabled()) |
1344 | return -ENODEV; | |
1345 | ||
269bda1c GKH |
1346 | if (!driver->description) |
1347 | driver->description = driver->driver.name; | |
5620b5f7 AS |
1348 | if (!driver->usb_driver) { |
1349 | WARN(1, "Serial driver %s has no usb_driver\n", | |
1350 | driver->description); | |
1351 | return -EINVAL; | |
1352 | } | |
269bda1c | 1353 | |
c3452f5e JH |
1354 | usb_serial_operations_init(driver); |
1355 | ||
1da177e4 | 1356 | /* Add this device to our list of devices */ |
0daeed38 | 1357 | mutex_lock(&table_lock); |
ea65370d | 1358 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1359 | |
ea65370d | 1360 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1361 | if (retval) { |
92931d24 | 1362 | pr_err("problem %d when registering driver %s\n", retval, driver->description); |
ea65370d | 1363 | list_del(&driver->driver_list); |
ca0400d2 | 1364 | } else { |
ee42f6c9 | 1365 | pr_info("USB Serial support registered for %s\n", driver->description); |
ca0400d2 | 1366 | } |
0daeed38 | 1367 | mutex_unlock(&table_lock); |
1da177e4 LT |
1368 | return retval; |
1369 | } | |
1370 | ||
f799e767 | 1371 | static void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1372 | { |
ee42f6c9 | 1373 | pr_info("USB Serial deregistering driver %s\n", device->description); |
10164c2a | 1374 | |
0daeed38 | 1375 | mutex_lock(&table_lock); |
1da177e4 | 1376 | list_del(&device->driver_list); |
0daeed38 | 1377 | mutex_unlock(&table_lock); |
10164c2a JH |
1378 | |
1379 | usb_serial_bus_deregister(device); | |
1da177e4 | 1380 | } |
1da177e4 | 1381 | |
765e0ba6 AS |
1382 | /** |
1383 | * usb_serial_register_drivers - register drivers for a usb-serial module | |
765e0ba6 | 1384 | * @serial_drivers: NULL-terminated array of pointers to drivers to be registered |
68e24113 GKH |
1385 | * @name: name of the usb_driver for this set of @serial_drivers |
1386 | * @id_table: list of all devices this @serial_drivers set binds to | |
765e0ba6 | 1387 | * |
68e24113 GKH |
1388 | * Registers all the drivers in the @serial_drivers array, and dynamically |
1389 | * creates a struct usb_driver with the name @name and id_table of @id_table. | |
765e0ba6 | 1390 | */ |
68e24113 GKH |
1391 | int usb_serial_register_drivers(struct usb_serial_driver *const serial_drivers[], |
1392 | const char *name, | |
1393 | const struct usb_device_id *id_table) | |
765e0ba6 AS |
1394 | { |
1395 | int rc; | |
68e24113 | 1396 | struct usb_driver *udriver; |
765e0ba6 AS |
1397 | struct usb_serial_driver * const *sd; |
1398 | ||
1399 | /* | |
1400 | * udriver must be registered before any of the serial drivers, | |
1401 | * because the store_new_id() routine for the serial drivers (in | |
1402 | * bus.c) probes udriver. | |
1403 | * | |
1404 | * Performance hack: We don't want udriver to be probed until | |
1405 | * the serial drivers are registered, because the probe would | |
1406 | * simply fail for lack of a matching serial driver. | |
68e24113 | 1407 | * So we leave udriver's id_table set to NULL until we are all set. |
5cbe61c5 AS |
1408 | * |
1409 | * Suspend/resume support is implemented in the usb-serial core, | |
1410 | * so fill in the PM-related fields in udriver. | |
765e0ba6 | 1411 | */ |
68e24113 GKH |
1412 | udriver = kzalloc(sizeof(*udriver), GFP_KERNEL); |
1413 | if (!udriver) | |
1414 | return -ENOMEM; | |
765e0ba6 | 1415 | |
68e24113 | 1416 | udriver->name = name; |
765e0ba6 | 1417 | udriver->no_dynamic_id = 1; |
5cbe61c5 AS |
1418 | udriver->supports_autosuspend = 1; |
1419 | udriver->suspend = usb_serial_suspend; | |
1420 | udriver->resume = usb_serial_resume; | |
5026bb07 | 1421 | udriver->probe = usb_serial_probe; |
32078f91 | 1422 | udriver->disconnect = usb_serial_disconnect; |
7186364e GKH |
1423 | |
1424 | /* we only set the reset_resume field if the serial_driver has one */ | |
1425 | for (sd = serial_drivers; *sd; ++sd) { | |
44b0f083 | 1426 | if ((*sd)->reset_resume) { |
7186364e GKH |
1427 | udriver->reset_resume = usb_serial_reset_resume; |
1428 | break; | |
44b0f083 | 1429 | } |
7186364e GKH |
1430 | } |
1431 | ||
765e0ba6 AS |
1432 | rc = usb_register(udriver); |
1433 | if (rc) | |
1434 | return rc; | |
1435 | ||
1436 | for (sd = serial_drivers; *sd; ++sd) { | |
1437 | (*sd)->usb_driver = udriver; | |
1438 | rc = usb_serial_register(*sd); | |
1439 | if (rc) | |
1440 | goto failed; | |
1441 | } | |
1442 | ||
68e24113 GKH |
1443 | /* Now set udriver's id_table and look for matches */ |
1444 | udriver->id_table = id_table; | |
765e0ba6 AS |
1445 | rc = driver_attach(&udriver->drvwrap.driver); |
1446 | return 0; | |
1447 | ||
1448 | failed: | |
1449 | while (sd-- > serial_drivers) | |
1450 | usb_serial_deregister(*sd); | |
1451 | usb_deregister(udriver); | |
1452 | return rc; | |
1453 | } | |
1454 | EXPORT_SYMBOL_GPL(usb_serial_register_drivers); | |
1455 | ||
1456 | /** | |
1457 | * usb_serial_deregister_drivers - deregister drivers for a usb-serial module | |
765e0ba6 AS |
1458 | * @serial_drivers: NULL-terminated array of pointers to drivers to be deregistered |
1459 | * | |
68e24113 GKH |
1460 | * Deregisters all the drivers in the @serial_drivers array and deregisters and |
1461 | * frees the struct usb_driver that was created by the call to | |
1462 | * usb_serial_register_drivers(). | |
765e0ba6 | 1463 | */ |
68e24113 | 1464 | void usb_serial_deregister_drivers(struct usb_serial_driver *const serial_drivers[]) |
765e0ba6 | 1465 | { |
68e24113 GKH |
1466 | struct usb_driver *udriver = (*serial_drivers)->usb_driver; |
1467 | ||
765e0ba6 AS |
1468 | for (; *serial_drivers; ++serial_drivers) |
1469 | usb_serial_deregister(*serial_drivers); | |
1470 | usb_deregister(udriver); | |
68e24113 | 1471 | kfree(udriver); |
765e0ba6 AS |
1472 | } |
1473 | EXPORT_SYMBOL_GPL(usb_serial_deregister_drivers); | |
1da177e4 | 1474 | |
a8d6f0a9 AC |
1475 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1476 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1477 | MODULE_LICENSE("GPL"); |