projects / deliverable / linux.git / blob
? search:


7d0811335b9a96491dc48fbdb3d7bbfd4fa35733
[deliverable/linux.git] / drivers / usb / serial / usb_wwan.c
1 /*
2 USB Driver layer for GSM modems
3
4 Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>
5
6 This driver is free software; you can redistribute it and/or modify
7 it under the terms of Version 2 of the GNU General Public License as
8 published by the Free Software Foundation.
9
10 Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
11
12 History: see the git log.
13
14 Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
15
16 This driver exists because the "normal" serial driver doesn't work too well
17 with GSM modems. Issues:
18 - data loss -- one single Receive URB is not nearly enough
19 - controlling the baud rate doesn't make sense
20 */
21
22 #define DRIVER_VERSION "v0.7.2"
23 #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
24 #define DRIVER_DESC "USB Driver for GSM modems"
25
26 #include <linux/kernel.h>
27 #include <linux/jiffies.h>
28 #include <linux/errno.h>
29 #include <linux/slab.h>
30 #include <linux/tty.h>
31 #include <linux/tty_flip.h>
32 #include <linux/module.h>
33 #include <linux/bitops.h>
34 #include <linux/uaccess.h>
35 #include <linux/usb.h>
36 #include <linux/usb/serial.h>
37 #include <linux/serial.h>
38 #include "usb-wwan.h"
39
40 static bool debug;
41
42 void usb_wwan_dtr_rts(struct usb_serial_port *port, int on)
43 {
44 struct usb_serial *serial = port->serial;
45 struct usb_wwan_port_private *portdata;
46 struct usb_wwan_intf_private *intfdata;
47
48 intfdata = port->serial->private;
49
50 if (!intfdata->send_setup)
51 return;
52
53 portdata = usb_get_serial_port_data(port);
54 mutex_lock(&serial->disc_mutex);
55 portdata->rts_state = on;
56 portdata->dtr_state = on;
57 if (serial->dev)
58 intfdata->send_setup(port);
59 mutex_unlock(&serial->disc_mutex);
60 }
61 EXPORT_SYMBOL(usb_wwan_dtr_rts);
62
63 void usb_wwan_set_termios(struct tty_struct *tty,
64 struct usb_serial_port *port,
65 struct ktermios *old_termios)
66 {
67 struct usb_wwan_intf_private *intfdata = port->serial->private;
68
69 /* Doesn't support option setting */
70 tty_termios_copy_hw(tty->termios, old_termios);
71
72 if (intfdata->send_setup)
73 intfdata->send_setup(port);
74 }
75 EXPORT_SYMBOL(usb_wwan_set_termios);
76
77 int usb_wwan_tiocmget(struct tty_struct *tty)
78 {
79 struct usb_serial_port *port = tty->driver_data;
80 unsigned int value;
81 struct usb_wwan_port_private *portdata;
82
83 portdata = usb_get_serial_port_data(port);
84
85 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
86 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
87 ((portdata->cts_state) ? TIOCM_CTS : 0) |
88 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
89 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
90 ((portdata->ri_state) ? TIOCM_RNG : 0);
91
92 return value;
93 }
94 EXPORT_SYMBOL(usb_wwan_tiocmget);
95
96 int usb_wwan_tiocmset(struct tty_struct *tty,
97 unsigned int set, unsigned int clear)
98 {
99 struct usb_serial_port *port = tty->driver_data;
100 struct usb_wwan_port_private *portdata;
101 struct usb_wwan_intf_private *intfdata;
102
103 portdata = usb_get_serial_port_data(port);
104 intfdata = port->serial->private;
105
106 if (!intfdata->send_setup)
107 return -EINVAL;
108
109 /* FIXME: what locks portdata fields ? */
110 if (set & TIOCM_RTS)
111 portdata->rts_state = 1;
112 if (set & TIOCM_DTR)
113 portdata->dtr_state = 1;
114
115 if (clear & TIOCM_RTS)
116 portdata->rts_state = 0;
117 if (clear & TIOCM_DTR)
118 portdata->dtr_state = 0;
119 return intfdata->send_setup(port);
120 }
121 EXPORT_SYMBOL(usb_wwan_tiocmset);
122
123 static int get_serial_info(struct usb_serial_port *port,
124 struct serial_struct __user *retinfo)
125 {
126 struct serial_struct tmp;
127
128 if (!retinfo)
129 return -EFAULT;
130
131 memset(&tmp, 0, sizeof(tmp));
132 tmp.line = port->serial->minor;
133 tmp.port = port->number;
134 tmp.baud_base = tty_get_baud_rate(port->port.tty);
135 tmp.close_delay = port->port.close_delay / 10;
136 tmp.closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
137 ASYNC_CLOSING_WAIT_NONE :
138 port->port.closing_wait / 10;
139
140 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
141 return -EFAULT;
142 return 0;
143 }
144
145 static int set_serial_info(struct usb_serial_port *port,
146 struct serial_struct __user *newinfo)
147 {
148 struct serial_struct new_serial;
149 unsigned int closing_wait, close_delay;
150 int retval = 0;
151
152 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
153 return -EFAULT;
154
155 close_delay = new_serial.close_delay * 10;
156 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
157 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
158
159 mutex_lock(&port->port.mutex);
160
161 if (!capable(CAP_SYS_ADMIN)) {
162 if ((close_delay != port->port.close_delay) ||
163 (closing_wait != port->port.closing_wait))
164 retval = -EPERM;
165 else
166 retval = -EOPNOTSUPP;
167 } else {
168 port->port.close_delay = close_delay;
169 port->port.closing_wait = closing_wait;
170 }
171
172 mutex_unlock(&port->port.mutex);
173 return retval;
174 }
175
176 int usb_wwan_ioctl(struct tty_struct *tty,
177 unsigned int cmd, unsigned long arg)
178 {
179 struct usb_serial_port *port = tty->driver_data;
180
181 dbg("%s cmd 0x%04x", __func__, cmd);
182
183 switch (cmd) {
184 case TIOCGSERIAL:
185 return get_serial_info(port,
186 (struct serial_struct __user *) arg);
187 case TIOCSSERIAL:
188 return set_serial_info(port,
189 (struct serial_struct __user *) arg);
190 default:
191 break;
192 }
193
194 dbg("%s arg not supported", __func__);
195
196 return -ENOIOCTLCMD;
197 }
198 EXPORT_SYMBOL(usb_wwan_ioctl);
199
200 /* Write */
201 int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
202 const unsigned char *buf, int count)
203 {
204 struct usb_wwan_port_private *portdata;
205 struct usb_wwan_intf_private *intfdata;
206 int i;
207 int left, todo;
208 struct urb *this_urb = NULL; /* spurious */
209 int err;
210 unsigned long flags;
211
212 portdata = usb_get_serial_port_data(port);
213 intfdata = port->serial->private;
214
215 dbg("%s: write (%d chars)", __func__, count);
216
217 i = 0;
218 left = count;
219 for (i = 0; left > 0 && i < N_OUT_URB; i++) {
220 todo = left;
221 if (todo > OUT_BUFLEN)
222 todo = OUT_BUFLEN;
223
224 this_urb = portdata->out_urbs[i];
225 if (test_and_set_bit(i, &portdata->out_busy)) {
226 if (time_before(jiffies,
227 portdata->tx_start_time[i] + 10 * HZ))
228 continue;
229 usb_unlink_urb(this_urb);
230 continue;
231 }
232 dbg("%s: endpoint %d buf %d", __func__,
233 usb_pipeendpoint(this_urb->pipe), i);
234
235 err = usb_autopm_get_interface_async(port->serial->interface);
236 if (err < 0)
237 break;
238
239 /* send the data */
240 memcpy(this_urb->transfer_buffer, buf, todo);
241 this_urb->transfer_buffer_length = todo;
242
243 spin_lock_irqsave(&intfdata->susp_lock, flags);
244 if (intfdata->suspended) {
245 usb_anchor_urb(this_urb, &portdata->delayed);
246 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
247 } else {
248 intfdata->in_flight++;
249 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
250 err = usb_submit_urb(this_urb, GFP_ATOMIC);
251 if (err) {
252 dbg("usb_submit_urb %p (write bulk) failed "
253 "(%d)", this_urb, err);
254 clear_bit(i, &portdata->out_busy);
255 spin_lock_irqsave(&intfdata->susp_lock, flags);
256 intfdata->in_flight--;
257 spin_unlock_irqrestore(&intfdata->susp_lock,
258 flags);
259 usb_autopm_put_interface_async(port->serial->interface);
260 break;
261 }
262 }
263
264 portdata->tx_start_time[i] = jiffies;
265 buf += todo;
266 left -= todo;
267 }
268
269 count -= left;
270 dbg("%s: wrote (did %d)", __func__, count);
271 return count;
272 }
273 EXPORT_SYMBOL(usb_wwan_write);
274
275 static void usb_wwan_indat_callback(struct urb *urb)
276 {
277 int err;
278 int endpoint;
279 struct usb_serial_port *port;
280 struct tty_struct *tty;
281 unsigned char *data = urb->transfer_buffer;
282 int status = urb->status;
283
284 endpoint = usb_pipeendpoint(urb->pipe);
285 port = urb->context;
286
287 if (status) {
288 dbg("%s: nonzero status: %d on endpoint %02x.",
289 __func__, status, endpoint);
290 } else {
291 tty = tty_port_tty_get(&port->port);
292 if (tty) {
293 if (urb->actual_length) {
294 tty_insert_flip_string(tty, data,
295 urb->actual_length);
296 tty_flip_buffer_push(tty);
297 } else
298 dbg("%s: empty read urb received", __func__);
299 tty_kref_put(tty);
300 }
301
302 /* Resubmit urb so we continue receiving */
303 err = usb_submit_urb(urb, GFP_ATOMIC);
304 if (err) {
305 if (err != -EPERM) {
306 printk(KERN_ERR "%s: resubmit read urb failed. "
307 "(%d)", __func__, err);
308 /* busy also in error unless we are killed */
309 usb_mark_last_busy(port->serial->dev);
310 }
311 } else {
312 usb_mark_last_busy(port->serial->dev);
313 }
314 }
315 }
316
317 static void usb_wwan_outdat_callback(struct urb *urb)
318 {
319 struct usb_serial_port *port;
320 struct usb_wwan_port_private *portdata;
321 struct usb_wwan_intf_private *intfdata;
322 int i;
323
324 port = urb->context;
325 intfdata = port->serial->private;
326
327 usb_serial_port_softint(port);
328 usb_autopm_put_interface_async(port->serial->interface);
329 portdata = usb_get_serial_port_data(port);
330 spin_lock(&intfdata->susp_lock);
331 intfdata->in_flight--;
332 spin_unlock(&intfdata->susp_lock);
333
334 for (i = 0; i < N_OUT_URB; ++i) {
335 if (portdata->out_urbs[i] == urb) {
336 smp_mb__before_clear_bit();
337 clear_bit(i, &portdata->out_busy);
338 break;
339 }
340 }
341 }
342
343 int usb_wwan_write_room(struct tty_struct *tty)
344 {
345 struct usb_serial_port *port = tty->driver_data;
346 struct usb_wwan_port_private *portdata;
347 int i;
348 int data_len = 0;
349 struct urb *this_urb;
350
351 portdata = usb_get_serial_port_data(port);
352
353 for (i = 0; i < N_OUT_URB; i++) {
354 this_urb = portdata->out_urbs[i];
355 if (this_urb && !test_bit(i, &portdata->out_busy))
356 data_len += OUT_BUFLEN;
357 }
358
359 dbg("%s: %d", __func__, data_len);
360 return data_len;
361 }
362 EXPORT_SYMBOL(usb_wwan_write_room);
363
364 int usb_wwan_chars_in_buffer(struct tty_struct *tty)
365 {
366 struct usb_serial_port *port = tty->driver_data;
367 struct usb_wwan_port_private *portdata;
368 int i;
369 int data_len = 0;
370 struct urb *this_urb;
371
372 portdata = usb_get_serial_port_data(port);
373
374 for (i = 0; i < N_OUT_URB; i++) {
375 this_urb = portdata->out_urbs[i];
376 /* FIXME: This locking is insufficient as this_urb may
377 go unused during the test */
378 if (this_urb && test_bit(i, &portdata->out_busy))
379 data_len += this_urb->transfer_buffer_length;
380 }
381 dbg("%s: %d", __func__, data_len);
382 return data_len;
383 }
384 EXPORT_SYMBOL(usb_wwan_chars_in_buffer);
385
386 int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port)
387 {
388 struct usb_wwan_port_private *portdata;
389 struct usb_wwan_intf_private *intfdata;
390 struct usb_serial *serial = port->serial;
391 int i, err;
392 struct urb *urb;
393
394 portdata = usb_get_serial_port_data(port);
395 intfdata = serial->private;
396
397 /* Start reading from the IN endpoint */
398 for (i = 0; i < N_IN_URB; i++) {
399 urb = portdata->in_urbs[i];
400 if (!urb)
401 continue;
402 err = usb_submit_urb(urb, GFP_KERNEL);
403 if (err) {
404 dbg("%s: submit urb %d failed (%d) %d",
405 __func__, i, err, urb->transfer_buffer_length);
406 }
407 }
408
409 if (intfdata->send_setup)
410 intfdata->send_setup(port);
411
412 serial->interface->needs_remote_wakeup = 1;
413 spin_lock_irq(&intfdata->susp_lock);
414 portdata->opened = 1;
415 spin_unlock_irq(&intfdata->susp_lock);
416 /* this balances a get in the generic USB serial code */
417 usb_autopm_put_interface(serial->interface);
418
419 return 0;
420 }
421 EXPORT_SYMBOL(usb_wwan_open);
422
423 void usb_wwan_close(struct usb_serial_port *port)
424 {
425 int i;
426 struct usb_serial *serial = port->serial;
427 struct usb_wwan_port_private *portdata;
428 struct usb_wwan_intf_private *intfdata = port->serial->private;
429
430 portdata = usb_get_serial_port_data(port);
431
432 if (serial->dev) {
433 /* Stop reading/writing urbs */
434 spin_lock_irq(&intfdata->susp_lock);
435 portdata->opened = 0;
436 spin_unlock_irq(&intfdata->susp_lock);
437
438 for (i = 0; i < N_IN_URB; i++)
439 usb_kill_urb(portdata->in_urbs[i]);
440 for (i = 0; i < N_OUT_URB; i++)
441 usb_kill_urb(portdata->out_urbs[i]);
442 /* balancing - important as an error cannot be handled*/
443 usb_autopm_get_interface_no_resume(serial->interface);
444 serial->interface->needs_remote_wakeup = 0;
445 }
446 }
447 EXPORT_SYMBOL(usb_wwan_close);
448
449 /* Helper functions used by usb_wwan_setup_urbs */
450 static struct urb *usb_wwan_setup_urb(struct usb_serial *serial, int endpoint,
451 int dir, void *ctx, char *buf, int len,
452 void (*callback) (struct urb *))
453 {
454 struct urb *urb;
455
456 if (endpoint == -1)
457 return NULL; /* endpoint not needed */
458
459 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
460 if (urb == NULL) {
461 dbg("%s: alloc for endpoint %d failed.", __func__, endpoint);
462 return NULL;
463 }
464
465 /* Fill URB using supplied data. */
466 usb_fill_bulk_urb(urb, serial->dev,
467 usb_sndbulkpipe(serial->dev, endpoint) | dir,
468 buf, len, callback, ctx);
469
470 return urb;
471 }
472
473 /* Setup urbs */
474 static void usb_wwan_setup_urbs(struct usb_serial *serial)
475 {
476 int i, j;
477 struct usb_serial_port *port;
478 struct usb_wwan_port_private *portdata;
479
480 for (i = 0; i < serial->num_ports; i++) {
481 port = serial->port[i];
482 portdata = usb_get_serial_port_data(port);
483
484 /* Do indat endpoints first */
485 for (j = 0; j < N_IN_URB; ++j) {
486 portdata->in_urbs[j] = usb_wwan_setup_urb(serial,
487 port->
488 bulk_in_endpointAddress,
489 USB_DIR_IN,
490 port,
491 portdata->
492 in_buffer[j],
493 IN_BUFLEN,
494 usb_wwan_indat_callback);
495 }
496
497 /* outdat endpoints */
498 for (j = 0; j < N_OUT_URB; ++j) {
499 portdata->out_urbs[j] = usb_wwan_setup_urb(serial,
500 port->
501 bulk_out_endpointAddress,
502 USB_DIR_OUT,
503 port,
504 portdata->
505 out_buffer
506 [j],
507 OUT_BUFLEN,
508 usb_wwan_outdat_callback);
509 }
510 }
511 }
512
513 int usb_wwan_startup(struct usb_serial *serial)
514 {
515 int i, j, err;
516 struct usb_serial_port *port;
517 struct usb_wwan_port_private *portdata;
518 u8 *buffer;
519
520 /* Now setup per port private data */
521 for (i = 0; i < serial->num_ports; i++) {
522 port = serial->port[i];
523 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
524 if (!portdata) {
525 dbg("%s: kmalloc for usb_wwan_port_private (%d) failed!.",
526 __func__, i);
527 return 1;
528 }
529 init_usb_anchor(&portdata->delayed);
530
531 for (j = 0; j < N_IN_URB; j++) {
532 buffer = (u8 *) __get_free_page(GFP_KERNEL);
533 if (!buffer)
534 goto bail_out_error;
535 portdata->in_buffer[j] = buffer;
536 }
537
538 for (j = 0; j < N_OUT_URB; j++) {
539 buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
540 if (!buffer)
541 goto bail_out_error2;
542 portdata->out_buffer[j] = buffer;
543 }
544
545 usb_set_serial_port_data(port, portdata);
546
547 if (!port->interrupt_in_urb)
548 continue;
549 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
550 if (err)
551 dbg("%s: submit irq_in urb failed %d", __func__, err);
552 }
553 usb_wwan_setup_urbs(serial);
554 return 0;
555
556 bail_out_error2:
557 for (j = 0; j < N_OUT_URB; j++)
558 kfree(portdata->out_buffer[j]);
559 bail_out_error:
560 for (j = 0; j < N_IN_URB; j++)
561 if (portdata->in_buffer[j])
562 free_page((unsigned long)portdata->in_buffer[j]);
563 kfree(portdata);
564 return 1;
565 }
566 EXPORT_SYMBOL(usb_wwan_startup);
567
568 int usb_wwan_port_remove(struct usb_serial_port *port)
569 {
570 int i;
571 struct usb_wwan_port_private *portdata;
572
573 portdata = usb_get_serial_port_data(port);
574 usb_set_serial_port_data(port, NULL);
575
576 /* Stop reading/writing urbs and free them */
577 for (i = 0; i < N_IN_URB; i++) {
578 usb_kill_urb(portdata->in_urbs[i]);
579 usb_free_urb(portdata->in_urbs[i]);
580 free_page((unsigned long)portdata->in_buffer[i]);
581 }
582 for (i = 0; i < N_OUT_URB; i++) {
583 usb_kill_urb(portdata->out_urbs[i]);
584 usb_free_urb(portdata->out_urbs[i]);
585 kfree(portdata->out_buffer[i]);
586 }
587
588 /* Now free port private data */
589 kfree(portdata);
590 return 0;
591 }
592 EXPORT_SYMBOL(usb_wwan_port_remove);
593
594 #ifdef CONFIG_PM
595 static void stop_read_write_urbs(struct usb_serial *serial)
596 {
597 int i, j;
598 struct usb_serial_port *port;
599 struct usb_wwan_port_private *portdata;
600
601 /* Stop reading/writing urbs */
602 for (i = 0; i < serial->num_ports; ++i) {
603 port = serial->port[i];
604 portdata = usb_get_serial_port_data(port);
605 for (j = 0; j < N_IN_URB; j++)
606 usb_kill_urb(portdata->in_urbs[j]);
607 for (j = 0; j < N_OUT_URB; j++)
608 usb_kill_urb(portdata->out_urbs[j]);
609 }
610 }
611
612 int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message)
613 {
614 struct usb_wwan_intf_private *intfdata = serial->private;
615 int b;
616
617 if (PMSG_IS_AUTO(message)) {
618 spin_lock_irq(&intfdata->susp_lock);
619 b = intfdata->in_flight;
620 spin_unlock_irq(&intfdata->susp_lock);
621
622 if (b)
623 return -EBUSY;
624 }
625
626 spin_lock_irq(&intfdata->susp_lock);
627 intfdata->suspended = 1;
628 spin_unlock_irq(&intfdata->susp_lock);
629 stop_read_write_urbs(serial);
630
631 return 0;
632 }
633 EXPORT_SYMBOL(usb_wwan_suspend);
634
635 static void unbusy_queued_urb(struct urb *urb, struct usb_wwan_port_private *portdata)
636 {
637 int i;
638
639 for (i = 0; i < N_OUT_URB; i++) {
640 if (urb == portdata->out_urbs[i]) {
641 clear_bit(i, &portdata->out_busy);
642 break;
643 }
644 }
645 }
646
647 static void play_delayed(struct usb_serial_port *port)
648 {
649 struct usb_wwan_intf_private *data;
650 struct usb_wwan_port_private *portdata;
651 struct urb *urb;
652 int err;
653
654 portdata = usb_get_serial_port_data(port);
655 data = port->serial->private;
656 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
657 err = usb_submit_urb(urb, GFP_ATOMIC);
658 if (!err) {
659 data->in_flight++;
660 } else {
661 /* we have to throw away the rest */
662 do {
663 unbusy_queued_urb(urb, portdata);
664 usb_autopm_put_interface_no_suspend(port->serial->interface);
665 } while ((urb = usb_get_from_anchor(&portdata->delayed)));
666 break;
667 }
668 }
669 }
670
671 int usb_wwan_resume(struct usb_serial *serial)
672 {
673 int i, j;
674 struct usb_serial_port *port;
675 struct usb_wwan_intf_private *intfdata = serial->private;
676 struct usb_wwan_port_private *portdata;
677 struct urb *urb;
678 int err = 0;
679
680 /* get the interrupt URBs resubmitted unconditionally */
681 for (i = 0; i < serial->num_ports; i++) {
682 port = serial->port[i];
683 if (!port->interrupt_in_urb) {
684 dbg("%s: No interrupt URB for port %d", __func__, i);
685 continue;
686 }
687 err = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
688 dbg("Submitted interrupt URB for port %d (result %d)", i, err);
689 if (err < 0) {
690 dev_err(&port->dev, "%s: Error %d for interrupt URB\n",
691 __func__, err);
692 goto err_out;
693 }
694 }
695
696 for (i = 0; i < serial->num_ports; i++) {
697 /* walk all ports */
698 port = serial->port[i];
699 portdata = usb_get_serial_port_data(port);
700
701 /* skip closed ports */
702 spin_lock_irq(&intfdata->susp_lock);
703 if (!portdata->opened) {
704 spin_unlock_irq(&intfdata->susp_lock);
705 continue;
706 }
707
708 for (j = 0; j < N_IN_URB; j++) {
709 urb = portdata->in_urbs[j];
710 err = usb_submit_urb(urb, GFP_ATOMIC);
711 if (err < 0) {
712 dev_err(&port->dev, "%s: Error %d for bulk URB %d\n",
713 __func__, err, i);
714 spin_unlock_irq(&intfdata->susp_lock);
715 goto err_out;
716 }
717 }
718 play_delayed(port);
719 spin_unlock_irq(&intfdata->susp_lock);
720 }
721 spin_lock_irq(&intfdata->susp_lock);
722 intfdata->suspended = 0;
723 spin_unlock_irq(&intfdata->susp_lock);
724 err_out:
725 return err;
726 }
727 EXPORT_SYMBOL(usb_wwan_resume);
728 #endif
729
730 MODULE_AUTHOR(DRIVER_AUTHOR);
731 MODULE_DESCRIPTION(DRIVER_DESC);
732 MODULE_VERSION(DRIVER_VERSION);
733 MODULE_LICENSE("GPL");
734
735 module_param(debug, bool, S_IRUGO | S_IWUSR);
736 MODULE_PARM_DESC(debug, "Debug messages");
Linux kernel - Deliverables
This page took 0.043697 seconds and 4 git commands to generate.