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 int 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 47 struct usb_wwan_intf_private *intfdata; 48 49 dbg("%s", __func__); 50 51 intfdata = port->serial->private; 52 53 if (!intfdata->send_setup) 54 return; 55 56 portdata = usb_get_serial_port_data(port); 57 mutex_lock(&serial->disc_mutex); 58 portdata->rts_state = on; 59 portdata->dtr_state = on; 60 if (serial->dev) 61 intfdata->send_setup(port); 62 mutex_unlock(&serial->disc_mutex); 63 } 64 EXPORT_SYMBOL(usb_wwan_dtr_rts); 65 66 void usb_wwan_set_termios(struct tty_struct *tty, 67 struct usb_serial_port *port, 68 struct ktermios *old_termios) 69 { 70 struct usb_wwan_intf_private *intfdata = port->serial->private; 71 72 dbg("%s", __func__); 73 74 /* Doesn't support option setting */ 75 tty_termios_copy_hw(tty->termios, old_termios); 76 77 if (intfdata->send_setup) 78 intfdata->send_setup(port); 79 } 80 EXPORT_SYMBOL(usb_wwan_set_termios); 81 82 int usb_wwan_tiocmget(struct tty_struct *tty, struct file *file) 83 { 84 struct usb_serial_port *port = tty->driver_data; 85 unsigned int value; 86 struct usb_wwan_port_private *portdata; 87 88 portdata = usb_get_serial_port_data(port); 89 90 value = ((portdata->rts_state) ? TIOCM_RTS : 0) | 91 ((portdata->dtr_state) ? TIOCM_DTR : 0) | 92 ((portdata->cts_state) ? TIOCM_CTS : 0) | 93 ((portdata->dsr_state) ? TIOCM_DSR : 0) | 94 ((portdata->dcd_state) ? TIOCM_CAR : 0) | 95 ((portdata->ri_state) ? TIOCM_RNG : 0); 96 97 return value; 98 } 99 EXPORT_SYMBOL(usb_wwan_tiocmget); 100 101 int usb_wwan_tiocmset(struct tty_struct *tty, struct file *file, 102 unsigned int set, unsigned int clear) 103 { 104 struct usb_serial_port *port = tty->driver_data; 105 struct usb_wwan_port_private *portdata; 106 struct usb_wwan_intf_private *intfdata; 107 108 portdata = usb_get_serial_port_data(port); 109 intfdata = port->serial->private; 110 111 if (!intfdata->send_setup) 112 return -EINVAL; 113 114 /* FIXME: what locks portdata fields ? */ 115 if (set & TIOCM_RTS) 116 portdata->rts_state = 1; 117 if (set & TIOCM_DTR) 118 portdata->dtr_state = 1; 119 120 if (clear & TIOCM_RTS) 121 portdata->rts_state = 0; 122 if (clear & TIOCM_DTR) 123 portdata->dtr_state = 0; 124 return intfdata->send_setup(port); 125 } 126 EXPORT_SYMBOL(usb_wwan_tiocmset); 127 128 static int get_serial_info(struct usb_serial_port *port, 129 struct serial_struct __user *retinfo) 130 { 131 struct serial_struct tmp; 132 133 if (!retinfo) 134 return -EFAULT; 135 136 memset(&tmp, 0, sizeof(tmp)); 137 tmp.line = port->serial->minor; 138 tmp.port = port->number; 139 tmp.baud_base = tty_get_baud_rate(port->port.tty); 140 tmp.close_delay = port->port.close_delay / 10; 141 tmp.closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 142 ASYNC_CLOSING_WAIT_NONE : 143 port->port.closing_wait / 10; 144 145 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 146 return -EFAULT; 147 return 0; 148 } 149 150 static int set_serial_info(struct usb_serial_port *port, 151 struct serial_struct __user *newinfo) 152 { 153 struct serial_struct new_serial; 154 unsigned int closing_wait, close_delay; 155 int retval = 0; 156 157 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 158 return -EFAULT; 159 160 close_delay = new_serial.close_delay * 10; 161 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 162 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 163 164 mutex_lock(&port->port.mutex); 165 166 if (!capable(CAP_SYS_ADMIN)) { 167 if ((close_delay != port->port.close_delay) || 168 (closing_wait != port->port.closing_wait)) 169 retval = -EPERM; 170 else 171 retval = -EOPNOTSUPP; 172 } else { 173 port->port.close_delay = close_delay; 174 port->port.closing_wait = closing_wait; 175 } 176 177 mutex_unlock(&port->port.mutex); 178 return retval; 179 } 180 181 int usb_wwan_ioctl(struct tty_struct *tty, struct file *file, 182 unsigned int cmd, unsigned long arg) 183 { 184 struct usb_serial_port *port = tty->driver_data; 185 186 dbg("%s cmd 0x%04x", __func__, cmd); 187 188 switch (cmd) { 189 case TIOCGSERIAL: 190 return get_serial_info(port, 191 (struct serial_struct __user *) arg); 192 case TIOCSSERIAL: 193 return set_serial_info(port, 194 (struct serial_struct __user *) arg); 195 default: 196 break; 197 } 198 199 dbg("%s arg not supported", __func__); 200 201 return -ENOIOCTLCMD; 202 } 203 EXPORT_SYMBOL(usb_wwan_ioctl); 204 205 /* Write */ 206 int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port, 207 const unsigned char *buf, int count) 208 { 209 struct usb_wwan_port_private *portdata; 210 struct usb_wwan_intf_private *intfdata; 211 int i; 212 int left, todo; 213 struct urb *this_urb = NULL; /* spurious */ 214 int err; 215 unsigned long flags; 216 217 portdata = usb_get_serial_port_data(port); 218 intfdata = port->serial->private; 219 220 dbg("%s: write (%d chars)", __func__, count); 221 222 i = 0; 223 left = count; 224 for (i = 0; left > 0 && i < N_OUT_URB; i++) { 225 todo = left; 226 if (todo > OUT_BUFLEN) 227 todo = OUT_BUFLEN; 228 229 this_urb = portdata->out_urbs[i]; 230 if (test_and_set_bit(i, &portdata->out_busy)) { 231 if (time_before(jiffies, 232 portdata->tx_start_time[i] + 10 * HZ)) 233 continue; 234 usb_unlink_urb(this_urb); 235 continue; 236 } 237 dbg("%s: endpoint %d buf %d", __func__, 238 usb_pipeendpoint(this_urb->pipe), i); 239 240 err = usb_autopm_get_interface_async(port->serial->interface); 241 if (err < 0) 242 break; 243 244 /* send the data */ 245 memcpy(this_urb->transfer_buffer, buf, todo); 246 this_urb->transfer_buffer_length = todo; 247 248 spin_lock_irqsave(&intfdata->susp_lock, flags); 249 if (intfdata->suspended) { 250 usb_anchor_urb(this_urb, &portdata->delayed); 251 spin_unlock_irqrestore(&intfdata->susp_lock, flags); 252 } else { 253 intfdata->in_flight++; 254 spin_unlock_irqrestore(&intfdata->susp_lock, flags); 255 err = usb_submit_urb(this_urb, GFP_ATOMIC); 256 if (err) { 257 dbg("usb_submit_urb %p (write bulk) failed " 258 "(%d)", this_urb, err); 259 clear_bit(i, &portdata->out_busy); 260 spin_lock_irqsave(&intfdata->susp_lock, flags); 261 intfdata->in_flight--; 262 spin_unlock_irqrestore(&intfdata->susp_lock, 263 flags); 264 continue; 265 } 266 } 267 268 portdata->tx_start_time[i] = jiffies; 269 buf += todo; 270 left -= todo; 271 } 272 273 count -= left; 274 dbg("%s: wrote (did %d)", __func__, count); 275 return count; 276 } 277 EXPORT_SYMBOL(usb_wwan_write); 278 279 static void usb_wwan_indat_callback(struct urb *urb) 280 { 281 int err; 282 int endpoint; 283 struct usb_serial_port *port; 284 struct tty_struct *tty; 285 unsigned char *data = urb->transfer_buffer; 286 int status = urb->status; 287 288 dbg("%s: %p", __func__, urb); 289 290 endpoint = usb_pipeendpoint(urb->pipe); 291 port = urb->context; 292 293 if (status) { 294 dbg("%s: nonzero status: %d on endpoint %02x.", 295 __func__, status, endpoint); 296 } else { 297 tty = tty_port_tty_get(&port->port); 298 if (urb->actual_length) { 299 tty_insert_flip_string(tty, data, urb->actual_length); 300 tty_flip_buffer_push(tty); 301 } else 302 dbg("%s: empty read urb received", __func__); 303 tty_kref_put(tty); 304 305 /* Resubmit urb so we continue receiving */ 306 if (status != -ESHUTDOWN) { 307 err = usb_submit_urb(urb, GFP_ATOMIC); 308 if (err && err != -EPERM) 309 printk(KERN_ERR "%s: resubmit read urb failed. " 310 "(%d)", __func__, err); 311 else 312 usb_mark_last_busy(port->serial->dev); 313 } 314 315 } 316 } 317 318 static void usb_wwan_outdat_callback(struct urb *urb) 319 { 320 struct usb_serial_port *port; 321 struct usb_wwan_port_private *portdata; 322 struct usb_wwan_intf_private *intfdata; 323 int i; 324 325 dbg("%s", __func__); 326 327 port = urb->context; 328 intfdata = port->serial->private; 329 330 usb_serial_port_softint(port); 331 usb_autopm_put_interface_async(port->serial->interface); 332 portdata = usb_get_serial_port_data(port); 333 spin_lock(&intfdata->susp_lock); 334 intfdata->in_flight--; 335 spin_unlock(&intfdata->susp_lock); 336 337 for (i = 0; i < N_OUT_URB; ++i) { 338 if (portdata->out_urbs[i] == urb) { 339 smp_mb__before_clear_bit(); 340 clear_bit(i, &portdata->out_busy); 341 break; 342 } 343 } 344 } 345 346 int usb_wwan_write_room(struct tty_struct *tty) 347 { 348 struct usb_serial_port *port = tty->driver_data; 349 struct usb_wwan_port_private *portdata; 350 int i; 351 int data_len = 0; 352 struct urb *this_urb; 353 354 portdata = usb_get_serial_port_data(port); 355 356 for (i = 0; i < N_OUT_URB; i++) { 357 this_urb = portdata->out_urbs[i]; 358 if (this_urb && !test_bit(i, &portdata->out_busy)) 359 data_len += OUT_BUFLEN; 360 } 361 362 dbg("%s: %d", __func__, data_len); 363 return data_len; 364 } 365 EXPORT_SYMBOL(usb_wwan_write_room); 366 367 int usb_wwan_chars_in_buffer(struct tty_struct *tty) 368 { 369 struct usb_serial_port *port = tty->driver_data; 370 struct usb_wwan_port_private *portdata; 371 int i; 372 int data_len = 0; 373 struct urb *this_urb; 374 375 portdata = usb_get_serial_port_data(port); 376 377 for (i = 0; i < N_OUT_URB; i++) { 378 this_urb = portdata->out_urbs[i]; 379 /* FIXME: This locking is insufficient as this_urb may 380 go unused during the test */ 381 if (this_urb && test_bit(i, &portdata->out_busy)) 382 data_len += this_urb->transfer_buffer_length; 383 } 384 dbg("%s: %d", __func__, data_len); 385 return data_len; 386 } 387 EXPORT_SYMBOL(usb_wwan_chars_in_buffer); 388 389 int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port) 390 { 391 struct usb_wwan_port_private *portdata; 392 struct usb_wwan_intf_private *intfdata; 393 struct usb_serial *serial = port->serial; 394 int i, err; 395 struct urb *urb; 396 397 portdata = usb_get_serial_port_data(port); 398 intfdata = serial->private; 399 400 dbg("%s", __func__); 401 402 /* Start reading from the IN endpoint */ 403 for (i = 0; i < N_IN_URB; i++) { 404 urb = portdata->in_urbs[i]; 405 if (!urb) 406 continue; 407 err = usb_submit_urb(urb, GFP_KERNEL); 408 if (err) { 409 dbg("%s: submit urb %d failed (%d) %d", 410 __func__, i, err, urb->transfer_buffer_length); 411 } 412 } 413 414 if (intfdata->send_setup) 415 intfdata->send_setup(port); 416 417 serial->interface->needs_remote_wakeup = 1; 418 spin_lock_irq(&intfdata->susp_lock); 419 portdata->opened = 1; 420 spin_unlock_irq(&intfdata->susp_lock); 421 usb_autopm_put_interface(serial->interface); 422 423 return 0; 424 } 425 EXPORT_SYMBOL(usb_wwan_open); 426 427 void usb_wwan_close(struct usb_serial_port *port) 428 { 429 int i; 430 struct usb_serial *serial = port->serial; 431 struct usb_wwan_port_private *portdata; 432 struct usb_wwan_intf_private *intfdata = port->serial->private; 433 434 dbg("%s", __func__); 435 portdata = usb_get_serial_port_data(port); 436 437 if (serial->dev) { 438 /* Stop reading/writing urbs */ 439 spin_lock_irq(&intfdata->susp_lock); 440 portdata->opened = 0; 441 spin_unlock_irq(&intfdata->susp_lock); 442 443 for (i = 0; i < N_IN_URB; i++) 444 usb_kill_urb(portdata->in_urbs[i]); 445 for (i = 0; i < N_OUT_URB; i++) 446 usb_kill_urb(portdata->out_urbs[i]); 447 usb_autopm_get_interface(serial->interface); 448 serial->interface->needs_remote_wakeup = 0; 449 } 450 } 451 EXPORT_SYMBOL(usb_wwan_close); 452 453 /* Helper functions used by usb_wwan_setup_urbs */ 454 static struct urb *usb_wwan_setup_urb(struct usb_serial *serial, int endpoint, 455 int dir, void *ctx, char *buf, int len, 456 void (*callback) (struct urb *)) 457 { 458 struct urb *urb; 459 460 if (endpoint == -1) 461 return NULL; /* endpoint not needed */ 462 463 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */ 464 if (urb == NULL) { 465 dbg("%s: alloc for endpoint %d failed.", __func__, endpoint); 466 return NULL; 467 } 468 469 /* Fill URB using supplied data. */ 470 usb_fill_bulk_urb(urb, serial->dev, 471 usb_sndbulkpipe(serial->dev, endpoint) | dir, 472 buf, len, callback, ctx); 473 474 return urb; 475 } 476 477 /* Setup urbs */ 478 static void usb_wwan_setup_urbs(struct usb_serial *serial) 479 { 480 int i, j; 481 struct usb_serial_port *port; 482 struct usb_wwan_port_private *portdata; 483 484 dbg("%s", __func__); 485 486 for (i = 0; i < serial->num_ports; i++) { 487 port = serial->port[i]; 488 portdata = usb_get_serial_port_data(port); 489 490 /* Do indat endpoints first */ 491 for (j = 0; j < N_IN_URB; ++j) { 492 portdata->in_urbs[j] = usb_wwan_setup_urb(serial, 493 port-> 494 bulk_in_endpointAddress, 495 USB_DIR_IN, 496 port, 497 portdata-> 498 in_buffer[j], 499 IN_BUFLEN, 500 usb_wwan_indat_callback); 501 } 502 503 /* outdat endpoints */ 504 for (j = 0; j < N_OUT_URB; ++j) { 505 portdata->out_urbs[j] = usb_wwan_setup_urb(serial, 506 port-> 507 bulk_out_endpointAddress, 508 USB_DIR_OUT, 509 port, 510 portdata-> 511 out_buffer 512 [j], 513 OUT_BUFLEN, 514 usb_wwan_outdat_callback); 515 } 516 } 517 } 518 519 int usb_wwan_startup(struct usb_serial *serial) 520 { 521 int i, j, err; 522 struct usb_serial_port *port; 523 struct usb_wwan_port_private *portdata; 524 u8 *buffer; 525 526 dbg("%s", __func__); 527 528 /* Now setup per port private data */ 529 for (i = 0; i < serial->num_ports; i++) { 530 port = serial->port[i]; 531 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); 532 if (!portdata) { 533 dbg("%s: kmalloc for usb_wwan_port_private (%d) failed!.", 534 __func__, i); 535 return 1; 536 } 537 init_usb_anchor(&portdata->delayed); 538 539 for (j = 0; j < N_IN_URB; j++) { 540 buffer = (u8 *) __get_free_page(GFP_KERNEL); 541 if (!buffer) 542 goto bail_out_error; 543 portdata->in_buffer[j] = buffer; 544 } 545 546 for (j = 0; j < N_OUT_URB; j++) { 547 buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL); 548 if (!buffer) 549 goto bail_out_error2; 550 portdata->out_buffer[j] = buffer; 551 } 552 553 usb_set_serial_port_data(port, portdata); 554 555 if (!port->interrupt_in_urb) 556 continue; 557 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 558 if (err) 559 dbg("%s: submit irq_in urb failed %d", __func__, err); 560 } 561 usb_wwan_setup_urbs(serial); 562 return 0; 563 564 bail_out_error2: 565 for (j = 0; j < N_OUT_URB; j++) 566 kfree(portdata->out_buffer[j]); 567 bail_out_error: 568 for (j = 0; j < N_IN_URB; j++) 569 if (portdata->in_buffer[j]) 570 free_page((unsigned long)portdata->in_buffer[j]); 571 kfree(portdata); 572 return 1; 573 } 574 EXPORT_SYMBOL(usb_wwan_startup); 575 576 static void stop_read_write_urbs(struct usb_serial *serial) 577 { 578 int i, j; 579 struct usb_serial_port *port; 580 struct usb_wwan_port_private *portdata; 581 582 /* Stop reading/writing urbs */ 583 for (i = 0; i < serial->num_ports; ++i) { 584 port = serial->port[i]; 585 portdata = usb_get_serial_port_data(port); 586 for (j = 0; j < N_IN_URB; j++) 587 usb_kill_urb(portdata->in_urbs[j]); 588 for (j = 0; j < N_OUT_URB; j++) 589 usb_kill_urb(portdata->out_urbs[j]); 590 } 591 } 592 593 void usb_wwan_disconnect(struct usb_serial *serial) 594 { 595 dbg("%s", __func__); 596 597 stop_read_write_urbs(serial); 598 } 599 EXPORT_SYMBOL(usb_wwan_disconnect); 600 601 void usb_wwan_release(struct usb_serial *serial) 602 { 603 int i, j; 604 struct usb_serial_port *port; 605 struct usb_wwan_port_private *portdata; 606 607 dbg("%s", __func__); 608 609 /* Now free them */ 610 for (i = 0; i < serial->num_ports; ++i) { 611 port = serial->port[i]; 612 portdata = usb_get_serial_port_data(port); 613 614 for (j = 0; j < N_IN_URB; j++) { 615 usb_free_urb(portdata->in_urbs[j]); 616 free_page((unsigned long) 617 portdata->in_buffer[j]); 618 portdata->in_urbs[j] = NULL; 619 } 620 for (j = 0; j < N_OUT_URB; j++) { 621 usb_free_urb(portdata->out_urbs[j]); 622 kfree(portdata->out_buffer[j]); 623 portdata->out_urbs[j] = NULL; 624 } 625 } 626 627 /* Now free per port private data */ 628 for (i = 0; i < serial->num_ports; i++) { 629 port = serial->port[i]; 630 kfree(usb_get_serial_port_data(port)); 631 } 632 } 633 EXPORT_SYMBOL(usb_wwan_release); 634 635 #ifdef CONFIG_PM 636 int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message) 637 { 638 struct usb_wwan_intf_private *intfdata = serial->private; 639 int b; 640 641 dbg("%s entered", __func__); 642 643 if (message.event & PM_EVENT_AUTO) { 644 spin_lock_irq(&intfdata->susp_lock); 645 b = intfdata->in_flight; 646 spin_unlock_irq(&intfdata->susp_lock); 647 648 if (b) 649 return -EBUSY; 650 } 651 652 spin_lock_irq(&intfdata->susp_lock); 653 intfdata->suspended = 1; 654 spin_unlock_irq(&intfdata->susp_lock); 655 stop_read_write_urbs(serial); 656 657 return 0; 658 } 659 EXPORT_SYMBOL(usb_wwan_suspend); 660 661 static void play_delayed(struct usb_serial_port *port) 662 { 663 struct usb_wwan_intf_private *data; 664 struct usb_wwan_port_private *portdata; 665 struct urb *urb; 666 int err; 667 668 portdata = usb_get_serial_port_data(port); 669 data = port->serial->private; 670 while ((urb = usb_get_from_anchor(&portdata->delayed))) { 671 err = usb_submit_urb(urb, GFP_ATOMIC); 672 if (!err) 673 data->in_flight++; 674 } 675 } 676 677 int usb_wwan_resume(struct usb_serial *serial) 678 { 679 int i, j; 680 struct usb_serial_port *port; 681 struct usb_wwan_intf_private *intfdata = serial->private; 682 struct usb_wwan_port_private *portdata; 683 struct urb *urb; 684 int err = 0; 685 686 dbg("%s entered", __func__); 687 /* get the interrupt URBs resubmitted unconditionally */ 688 for (i = 0; i < serial->num_ports; i++) { 689 port = serial->port[i]; 690 if (!port->interrupt_in_urb) { 691 dbg("%s: No interrupt URB for port %d", __func__, i); 692 continue; 693 } 694 err = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); 695 dbg("Submitted interrupt URB for port %d (result %d)", i, err); 696 if (err < 0) { 697 err("%s: Error %d for interrupt URB of port%d", 698 __func__, err, i); 699 goto err_out; 700 } 701 } 702 703 for (i = 0; i < serial->num_ports; i++) { 704 /* walk all ports */ 705 port = serial->port[i]; 706 portdata = usb_get_serial_port_data(port); 707 708 /* skip closed ports */ 709 spin_lock_irq(&intfdata->susp_lock); 710 if (!portdata->opened) { 711 spin_unlock_irq(&intfdata->susp_lock); 712 continue; 713 } 714 715 for (j = 0; j < N_IN_URB; j++) { 716 urb = portdata->in_urbs[j]; 717 err = usb_submit_urb(urb, GFP_ATOMIC); 718 if (err < 0) { 719 err("%s: Error %d for bulk URB %d", 720 __func__, err, i); 721 spin_unlock_irq(&intfdata->susp_lock); 722 goto err_out; 723 } 724 } 725 play_delayed(port); 726 spin_unlock_irq(&intfdata->susp_lock); 727 } 728 spin_lock_irq(&intfdata->susp_lock); 729 intfdata->suspended = 0; 730 spin_unlock_irq(&intfdata->susp_lock); 731 err_out: 732 return err; 733 } 734 EXPORT_SYMBOL(usb_wwan_resume); 735 #endif 736 737 MODULE_AUTHOR(DRIVER_AUTHOR); 738 MODULE_DESCRIPTION(DRIVER_DESC); 739 MODULE_VERSION(DRIVER_VERSION); 740 MODULE_LICENSE("GPL"); 741 742 module_param(debug, bool, S_IRUGO | S_IWUSR); 743 MODULE_PARM_DESC(debug, "Debug messages"); 744