1 /* 2 * cdc-acm.c 3 * 4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 11 * 12 * USB Abstract Control Model driver for USB modems and ISDN adapters 13 * 14 * Sponsored by SuSE 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 */ 30 31 #undef DEBUG 32 #undef VERBOSE_DEBUG 33 34 #include <linux/kernel.h> 35 #include <linux/errno.h> 36 #include <linux/init.h> 37 #include <linux/slab.h> 38 #include <linux/tty.h> 39 #include <linux/serial.h> 40 #include <linux/tty_driver.h> 41 #include <linux/tty_flip.h> 42 #include <linux/module.h> 43 #include <linux/mutex.h> 44 #include <linux/uaccess.h> 45 #include <linux/usb.h> 46 #include <linux/usb/cdc.h> 47 #include <asm/byteorder.h> 48 #include <asm/unaligned.h> 49 #include <linux/idr.h> 50 #include <linux/list.h> 51 52 #include "cdc-acm.h" 53 54 55 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 56 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 57 58 static struct usb_driver acm_driver; 59 static struct tty_driver *acm_tty_driver; 60 61 static DEFINE_IDR(acm_minors); 62 static DEFINE_MUTEX(acm_minors_lock); 63 64 static void acm_tty_set_termios(struct tty_struct *tty, 65 struct ktermios *termios_old); 66 67 /* 68 * acm_minors accessors 69 */ 70 71 /* 72 * Look up an ACM structure by minor. If found and not disconnected, increment 73 * its refcount and return it with its mutex held. 74 */ 75 static struct acm *acm_get_by_minor(unsigned int minor) 76 { 77 struct acm *acm; 78 79 mutex_lock(&acm_minors_lock); 80 acm = idr_find(&acm_minors, minor); 81 if (acm) { 82 mutex_lock(&acm->mutex); 83 if (acm->disconnected) { 84 mutex_unlock(&acm->mutex); 85 acm = NULL; 86 } else { 87 tty_port_get(&acm->port); 88 mutex_unlock(&acm->mutex); 89 } 90 } 91 mutex_unlock(&acm_minors_lock); 92 return acm; 93 } 94 95 /* 96 * Try to find an available minor number and if found, associate it with 'acm'. 97 */ 98 static int acm_alloc_minor(struct acm *acm) 99 { 100 int minor; 101 102 mutex_lock(&acm_minors_lock); 103 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 104 mutex_unlock(&acm_minors_lock); 105 106 return minor; 107 } 108 109 /* Release the minor number associated with 'acm'. */ 110 static void acm_release_minor(struct acm *acm) 111 { 112 mutex_lock(&acm_minors_lock); 113 idr_remove(&acm_minors, acm->minor); 114 mutex_unlock(&acm_minors_lock); 115 } 116 117 /* 118 * Functions for ACM control messages. 119 */ 120 121 static int acm_ctrl_msg(struct acm *acm, int request, int value, 122 void *buf, int len) 123 { 124 int retval; 125 126 retval = usb_autopm_get_interface(acm->control); 127 if (retval) 128 return retval; 129 130 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 131 request, USB_RT_ACM, value, 132 acm->control->altsetting[0].desc.bInterfaceNumber, 133 buf, len, 5000); 134 135 dev_dbg(&acm->control->dev, 136 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 137 __func__, request, value, len, retval); 138 139 usb_autopm_put_interface(acm->control); 140 141 return retval < 0 ? retval : 0; 142 } 143 144 /* devices aren't required to support these requests. 145 * the cdc acm descriptor tells whether they do... 146 */ 147 static inline int acm_set_control(struct acm *acm, int control) 148 { 149 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 150 return -EOPNOTSUPP; 151 152 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 153 control, NULL, 0); 154 } 155 156 #define acm_set_line(acm, line) \ 157 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 158 #define acm_send_break(acm, ms) \ 159 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 160 161 /* 162 * Write buffer management. 163 * All of these assume proper locks taken by the caller. 164 */ 165 166 static int acm_wb_alloc(struct acm *acm) 167 { 168 int i, wbn; 169 struct acm_wb *wb; 170 171 wbn = 0; 172 i = 0; 173 for (;;) { 174 wb = &acm->wb[wbn]; 175 if (!wb->use) { 176 wb->use = 1; 177 return wbn; 178 } 179 wbn = (wbn + 1) % ACM_NW; 180 if (++i >= ACM_NW) 181 return -1; 182 } 183 } 184 185 static int acm_wb_is_avail(struct acm *acm) 186 { 187 int i, n; 188 unsigned long flags; 189 190 n = ACM_NW; 191 spin_lock_irqsave(&acm->write_lock, flags); 192 for (i = 0; i < ACM_NW; i++) 193 n -= acm->wb[i].use; 194 spin_unlock_irqrestore(&acm->write_lock, flags); 195 return n; 196 } 197 198 /* 199 * Finish write. Caller must hold acm->write_lock 200 */ 201 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 202 { 203 wb->use = 0; 204 acm->transmitting--; 205 usb_autopm_put_interface_async(acm->control); 206 } 207 208 /* 209 * Poke write. 210 * 211 * the caller is responsible for locking 212 */ 213 214 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 215 { 216 int rc; 217 218 acm->transmitting++; 219 220 wb->urb->transfer_buffer = wb->buf; 221 wb->urb->transfer_dma = wb->dmah; 222 wb->urb->transfer_buffer_length = wb->len; 223 wb->urb->dev = acm->dev; 224 225 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 226 if (rc < 0) { 227 dev_err(&acm->data->dev, 228 "%s - usb_submit_urb(write bulk) failed: %d\n", 229 __func__, rc); 230 acm_write_done(acm, wb); 231 } 232 return rc; 233 } 234 235 /* 236 * attributes exported through sysfs 237 */ 238 static ssize_t show_caps 239 (struct device *dev, struct device_attribute *attr, char *buf) 240 { 241 struct usb_interface *intf = to_usb_interface(dev); 242 struct acm *acm = usb_get_intfdata(intf); 243 244 return sprintf(buf, "%d", acm->ctrl_caps); 245 } 246 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); 247 248 static ssize_t show_country_codes 249 (struct device *dev, struct device_attribute *attr, char *buf) 250 { 251 struct usb_interface *intf = to_usb_interface(dev); 252 struct acm *acm = usb_get_intfdata(intf); 253 254 memcpy(buf, acm->country_codes, acm->country_code_size); 255 return acm->country_code_size; 256 } 257 258 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); 259 260 static ssize_t show_country_rel_date 261 (struct device *dev, struct device_attribute *attr, char *buf) 262 { 263 struct usb_interface *intf = to_usb_interface(dev); 264 struct acm *acm = usb_get_intfdata(intf); 265 266 return sprintf(buf, "%d", acm->country_rel_date); 267 } 268 269 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); 270 /* 271 * Interrupt handlers for various ACM device responses 272 */ 273 274 /* control interface reports status changes with "interrupt" transfers */ 275 static void acm_ctrl_irq(struct urb *urb) 276 { 277 struct acm *acm = urb->context; 278 struct usb_cdc_notification *dr = urb->transfer_buffer; 279 unsigned char *data; 280 int newctrl; 281 int difference; 282 int retval; 283 int status = urb->status; 284 285 switch (status) { 286 case 0: 287 /* success */ 288 break; 289 case -ECONNRESET: 290 case -ENOENT: 291 case -ESHUTDOWN: 292 /* this urb is terminated, clean up */ 293 dev_dbg(&acm->control->dev, 294 "%s - urb shutting down with status: %d\n", 295 __func__, status); 296 return; 297 default: 298 dev_dbg(&acm->control->dev, 299 "%s - nonzero urb status received: %d\n", 300 __func__, status); 301 goto exit; 302 } 303 304 usb_mark_last_busy(acm->dev); 305 306 data = (unsigned char *)(dr + 1); 307 switch (dr->bNotificationType) { 308 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 309 dev_dbg(&acm->control->dev, "%s - network connection: %d\n", 310 __func__, dr->wValue); 311 break; 312 313 case USB_CDC_NOTIFY_SERIAL_STATE: 314 newctrl = get_unaligned_le16(data); 315 316 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 317 dev_dbg(&acm->control->dev, "%s - calling hangup\n", 318 __func__); 319 tty_port_tty_hangup(&acm->port, false); 320 } 321 322 difference = acm->ctrlin ^ newctrl; 323 spin_lock(&acm->read_lock); 324 acm->ctrlin = newctrl; 325 acm->oldcount = acm->iocount; 326 327 if (difference & ACM_CTRL_DSR) 328 acm->iocount.dsr++; 329 if (difference & ACM_CTRL_BRK) 330 acm->iocount.brk++; 331 if (difference & ACM_CTRL_RI) 332 acm->iocount.rng++; 333 if (difference & ACM_CTRL_DCD) 334 acm->iocount.dcd++; 335 if (difference & ACM_CTRL_FRAMING) 336 acm->iocount.frame++; 337 if (difference & ACM_CTRL_PARITY) 338 acm->iocount.parity++; 339 if (difference & ACM_CTRL_OVERRUN) 340 acm->iocount.overrun++; 341 spin_unlock(&acm->read_lock); 342 343 if (difference) 344 wake_up_all(&acm->wioctl); 345 346 break; 347 348 default: 349 dev_dbg(&acm->control->dev, 350 "%s - unknown notification %d received: index %d " 351 "len %d data0 %d data1 %d\n", 352 __func__, 353 dr->bNotificationType, dr->wIndex, 354 dr->wLength, data[0], data[1]); 355 break; 356 } 357 exit: 358 retval = usb_submit_urb(urb, GFP_ATOMIC); 359 if (retval && retval != -EPERM) 360 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", 361 __func__, retval); 362 } 363 364 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 365 { 366 int res; 367 368 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 369 return 0; 370 371 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 372 if (res) { 373 if (res != -EPERM) { 374 dev_err(&acm->data->dev, 375 "urb %d failed submission with %d\n", 376 index, res); 377 } 378 set_bit(index, &acm->read_urbs_free); 379 return res; 380 } else { 381 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 382 } 383 384 return 0; 385 } 386 387 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 388 { 389 int res; 390 int i; 391 392 for (i = 0; i < acm->rx_buflimit; ++i) { 393 res = acm_submit_read_urb(acm, i, mem_flags); 394 if (res) 395 return res; 396 } 397 398 return 0; 399 } 400 401 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 402 { 403 if (!urb->actual_length) 404 return; 405 406 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 407 urb->actual_length); 408 tty_flip_buffer_push(&acm->port); 409 } 410 411 static void acm_read_bulk_callback(struct urb *urb) 412 { 413 struct acm_rb *rb = urb->context; 414 struct acm *acm = rb->instance; 415 unsigned long flags; 416 int status = urb->status; 417 418 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 419 rb->index, urb->actual_length, 420 status); 421 422 if (!acm->dev) { 423 set_bit(rb->index, &acm->read_urbs_free); 424 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 425 return; 426 } 427 428 if (status) { 429 set_bit(rb->index, &acm->read_urbs_free); 430 if ((status != -ENOENT) || (urb->actual_length == 0)) 431 return; 432 } 433 434 usb_mark_last_busy(acm->dev); 435 436 acm_process_read_urb(acm, urb); 437 /* 438 * Unthrottle may run on another CPU which needs to see events 439 * in the same order. Submission has an implict barrier 440 */ 441 smp_mb__before_atomic(); 442 set_bit(rb->index, &acm->read_urbs_free); 443 444 /* throttle device if requested by tty */ 445 spin_lock_irqsave(&acm->read_lock, flags); 446 acm->throttled = acm->throttle_req; 447 if (!acm->throttled) { 448 spin_unlock_irqrestore(&acm->read_lock, flags); 449 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 450 } else { 451 spin_unlock_irqrestore(&acm->read_lock, flags); 452 } 453 } 454 455 /* data interface wrote those outgoing bytes */ 456 static void acm_write_bulk(struct urb *urb) 457 { 458 struct acm_wb *wb = urb->context; 459 struct acm *acm = wb->instance; 460 unsigned long flags; 461 int status = urb->status; 462 463 if (status || (urb->actual_length != urb->transfer_buffer_length)) 464 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 465 urb->actual_length, 466 urb->transfer_buffer_length, 467 status); 468 469 spin_lock_irqsave(&acm->write_lock, flags); 470 acm_write_done(acm, wb); 471 spin_unlock_irqrestore(&acm->write_lock, flags); 472 schedule_work(&acm->work); 473 } 474 475 static void acm_softint(struct work_struct *work) 476 { 477 struct acm *acm = container_of(work, struct acm, work); 478 479 tty_port_tty_wakeup(&acm->port); 480 } 481 482 /* 483 * TTY handlers 484 */ 485 486 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 487 { 488 struct acm *acm; 489 int retval; 490 491 acm = acm_get_by_minor(tty->index); 492 if (!acm) 493 return -ENODEV; 494 495 retval = tty_standard_install(driver, tty); 496 if (retval) 497 goto error_init_termios; 498 499 tty->driver_data = acm; 500 501 return 0; 502 503 error_init_termios: 504 tty_port_put(&acm->port); 505 return retval; 506 } 507 508 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 509 { 510 struct acm *acm = tty->driver_data; 511 512 return tty_port_open(&acm->port, tty, filp); 513 } 514 515 static void acm_port_dtr_rts(struct tty_port *port, int raise) 516 { 517 struct acm *acm = container_of(port, struct acm, port); 518 int val; 519 int res; 520 521 if (raise) 522 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 523 else 524 val = 0; 525 526 /* FIXME: add missing ctrlout locking throughout driver */ 527 acm->ctrlout = val; 528 529 res = acm_set_control(acm, val); 530 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 531 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 532 } 533 534 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 535 { 536 struct acm *acm = container_of(port, struct acm, port); 537 int retval = -ENODEV; 538 int i; 539 540 mutex_lock(&acm->mutex); 541 if (acm->disconnected) 542 goto disconnected; 543 544 retval = usb_autopm_get_interface(acm->control); 545 if (retval) 546 goto error_get_interface; 547 548 /* 549 * FIXME: Why do we need this? Allocating 64K of physically contiguous 550 * memory is really nasty... 551 */ 552 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 553 acm->control->needs_remote_wakeup = 1; 554 555 acm->ctrlurb->dev = acm->dev; 556 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 557 if (retval) { 558 dev_err(&acm->control->dev, 559 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 560 goto error_submit_urb; 561 } 562 563 acm_tty_set_termios(tty, NULL); 564 565 /* 566 * Unthrottle device in case the TTY was closed while throttled. 567 */ 568 spin_lock_irq(&acm->read_lock); 569 acm->throttled = 0; 570 acm->throttle_req = 0; 571 spin_unlock_irq(&acm->read_lock); 572 573 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 574 if (retval) 575 goto error_submit_read_urbs; 576 577 usb_autopm_put_interface(acm->control); 578 579 mutex_unlock(&acm->mutex); 580 581 return 0; 582 583 error_submit_read_urbs: 584 for (i = 0; i < acm->rx_buflimit; i++) 585 usb_kill_urb(acm->read_urbs[i]); 586 usb_kill_urb(acm->ctrlurb); 587 error_submit_urb: 588 usb_autopm_put_interface(acm->control); 589 error_get_interface: 590 disconnected: 591 mutex_unlock(&acm->mutex); 592 593 return usb_translate_errors(retval); 594 } 595 596 static void acm_port_destruct(struct tty_port *port) 597 { 598 struct acm *acm = container_of(port, struct acm, port); 599 600 acm_release_minor(acm); 601 usb_put_intf(acm->control); 602 kfree(acm->country_codes); 603 kfree(acm); 604 } 605 606 static void acm_port_shutdown(struct tty_port *port) 607 { 608 struct acm *acm = container_of(port, struct acm, port); 609 struct urb *urb; 610 struct acm_wb *wb; 611 int i; 612 613 /* 614 * Need to grab write_lock to prevent race with resume, but no need to 615 * hold it due to the tty-port initialised flag. 616 */ 617 spin_lock_irq(&acm->write_lock); 618 spin_unlock_irq(&acm->write_lock); 619 620 usb_autopm_get_interface_no_resume(acm->control); 621 acm->control->needs_remote_wakeup = 0; 622 usb_autopm_put_interface(acm->control); 623 624 for (;;) { 625 urb = usb_get_from_anchor(&acm->delayed); 626 if (!urb) 627 break; 628 wb = urb->context; 629 wb->use = 0; 630 usb_autopm_put_interface_async(acm->control); 631 } 632 633 usb_kill_urb(acm->ctrlurb); 634 for (i = 0; i < ACM_NW; i++) 635 usb_kill_urb(acm->wb[i].urb); 636 for (i = 0; i < acm->rx_buflimit; i++) 637 usb_kill_urb(acm->read_urbs[i]); 638 } 639 640 static void acm_tty_cleanup(struct tty_struct *tty) 641 { 642 struct acm *acm = tty->driver_data; 643 644 tty_port_put(&acm->port); 645 } 646 647 static void acm_tty_hangup(struct tty_struct *tty) 648 { 649 struct acm *acm = tty->driver_data; 650 651 tty_port_hangup(&acm->port); 652 } 653 654 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 655 { 656 struct acm *acm = tty->driver_data; 657 658 tty_port_close(&acm->port, tty, filp); 659 } 660 661 static int acm_tty_write(struct tty_struct *tty, 662 const unsigned char *buf, int count) 663 { 664 struct acm *acm = tty->driver_data; 665 int stat; 666 unsigned long flags; 667 int wbn; 668 struct acm_wb *wb; 669 670 if (!count) 671 return 0; 672 673 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 674 675 spin_lock_irqsave(&acm->write_lock, flags); 676 wbn = acm_wb_alloc(acm); 677 if (wbn < 0) { 678 spin_unlock_irqrestore(&acm->write_lock, flags); 679 return 0; 680 } 681 wb = &acm->wb[wbn]; 682 683 if (!acm->dev) { 684 wb->use = 0; 685 spin_unlock_irqrestore(&acm->write_lock, flags); 686 return -ENODEV; 687 } 688 689 count = (count > acm->writesize) ? acm->writesize : count; 690 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 691 memcpy(wb->buf, buf, count); 692 wb->len = count; 693 694 stat = usb_autopm_get_interface_async(acm->control); 695 if (stat) { 696 wb->use = 0; 697 spin_unlock_irqrestore(&acm->write_lock, flags); 698 return stat; 699 } 700 701 if (acm->susp_count) { 702 if (acm->putbuffer) { 703 /* now to preserve order */ 704 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed); 705 acm->putbuffer = NULL; 706 } 707 usb_anchor_urb(wb->urb, &acm->delayed); 708 spin_unlock_irqrestore(&acm->write_lock, flags); 709 return count; 710 } else { 711 if (acm->putbuffer) { 712 /* at this point there is no good way to handle errors */ 713 acm_start_wb(acm, acm->putbuffer); 714 acm->putbuffer = NULL; 715 } 716 } 717 718 stat = acm_start_wb(acm, wb); 719 spin_unlock_irqrestore(&acm->write_lock, flags); 720 721 if (stat < 0) 722 return stat; 723 return count; 724 } 725 726 static void acm_tty_flush_chars(struct tty_struct *tty) 727 { 728 struct acm *acm = tty->driver_data; 729 struct acm_wb *cur = acm->putbuffer; 730 int err; 731 unsigned long flags; 732 733 if (!cur) /* nothing to do */ 734 return; 735 736 acm->putbuffer = NULL; 737 err = usb_autopm_get_interface_async(acm->control); 738 spin_lock_irqsave(&acm->write_lock, flags); 739 if (err < 0) { 740 cur->use = 0; 741 acm->putbuffer = cur; 742 goto out; 743 } 744 745 if (acm->susp_count) 746 usb_anchor_urb(cur->urb, &acm->delayed); 747 else 748 acm_start_wb(acm, cur); 749 out: 750 spin_unlock_irqrestore(&acm->write_lock, flags); 751 return; 752 } 753 754 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch) 755 { 756 struct acm *acm = tty->driver_data; 757 struct acm_wb *cur; 758 int wbn; 759 unsigned long flags; 760 761 overflow: 762 cur = acm->putbuffer; 763 if (!cur) { 764 spin_lock_irqsave(&acm->write_lock, flags); 765 wbn = acm_wb_alloc(acm); 766 if (wbn >= 0) { 767 cur = &acm->wb[wbn]; 768 acm->putbuffer = cur; 769 } 770 spin_unlock_irqrestore(&acm->write_lock, flags); 771 if (!cur) 772 return 0; 773 } 774 775 if (cur->len == acm->writesize) { 776 acm_tty_flush_chars(tty); 777 goto overflow; 778 } 779 780 cur->buf[cur->len++] = ch; 781 return 1; 782 } 783 784 static int acm_tty_write_room(struct tty_struct *tty) 785 { 786 struct acm *acm = tty->driver_data; 787 /* 788 * Do not let the line discipline to know that we have a reserve, 789 * or it might get too enthusiastic. 790 */ 791 return acm_wb_is_avail(acm) ? acm->writesize : 0; 792 } 793 794 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 795 { 796 struct acm *acm = tty->driver_data; 797 /* 798 * if the device was unplugged then any remaining characters fell out 799 * of the connector ;) 800 */ 801 if (acm->disconnected) 802 return 0; 803 /* 804 * This is inaccurate (overcounts), but it works. 805 */ 806 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 807 } 808 809 static void acm_tty_throttle(struct tty_struct *tty) 810 { 811 struct acm *acm = tty->driver_data; 812 813 spin_lock_irq(&acm->read_lock); 814 acm->throttle_req = 1; 815 spin_unlock_irq(&acm->read_lock); 816 } 817 818 static void acm_tty_unthrottle(struct tty_struct *tty) 819 { 820 struct acm *acm = tty->driver_data; 821 unsigned int was_throttled; 822 823 spin_lock_irq(&acm->read_lock); 824 was_throttled = acm->throttled; 825 acm->throttled = 0; 826 acm->throttle_req = 0; 827 spin_unlock_irq(&acm->read_lock); 828 829 if (was_throttled) 830 acm_submit_read_urbs(acm, GFP_KERNEL); 831 } 832 833 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 834 { 835 struct acm *acm = tty->driver_data; 836 int retval; 837 838 retval = acm_send_break(acm, state ? 0xffff : 0); 839 if (retval < 0) 840 dev_dbg(&acm->control->dev, "%s - send break failed\n", 841 __func__); 842 return retval; 843 } 844 845 static int acm_tty_tiocmget(struct tty_struct *tty) 846 { 847 struct acm *acm = tty->driver_data; 848 849 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 850 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 851 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 852 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 853 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 854 TIOCM_CTS; 855 } 856 857 static int acm_tty_tiocmset(struct tty_struct *tty, 858 unsigned int set, unsigned int clear) 859 { 860 struct acm *acm = tty->driver_data; 861 unsigned int newctrl; 862 863 newctrl = acm->ctrlout; 864 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 865 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 866 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 867 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 868 869 newctrl = (newctrl & ~clear) | set; 870 871 if (acm->ctrlout == newctrl) 872 return 0; 873 return acm_set_control(acm, acm->ctrlout = newctrl); 874 } 875 876 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 877 { 878 struct serial_struct tmp; 879 880 if (!info) 881 return -EINVAL; 882 883 memset(&tmp, 0, sizeof(tmp)); 884 tmp.flags = ASYNC_LOW_LATENCY; 885 tmp.xmit_fifo_size = acm->writesize; 886 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 887 tmp.close_delay = acm->port.close_delay / 10; 888 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 889 ASYNC_CLOSING_WAIT_NONE : 890 acm->port.closing_wait / 10; 891 892 if (copy_to_user(info, &tmp, sizeof(tmp))) 893 return -EFAULT; 894 else 895 return 0; 896 } 897 898 static int set_serial_info(struct acm *acm, 899 struct serial_struct __user *newinfo) 900 { 901 struct serial_struct new_serial; 902 unsigned int closing_wait, close_delay; 903 int retval = 0; 904 905 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 906 return -EFAULT; 907 908 close_delay = new_serial.close_delay * 10; 909 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 910 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 911 912 mutex_lock(&acm->port.mutex); 913 914 if (!capable(CAP_SYS_ADMIN)) { 915 if ((close_delay != acm->port.close_delay) || 916 (closing_wait != acm->port.closing_wait)) 917 retval = -EPERM; 918 else 919 retval = -EOPNOTSUPP; 920 } else { 921 acm->port.close_delay = close_delay; 922 acm->port.closing_wait = closing_wait; 923 } 924 925 mutex_unlock(&acm->port.mutex); 926 return retval; 927 } 928 929 static int wait_serial_change(struct acm *acm, unsigned long arg) 930 { 931 int rv = 0; 932 DECLARE_WAITQUEUE(wait, current); 933 struct async_icount old, new; 934 935 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD)) 936 return -EINVAL; 937 do { 938 spin_lock_irq(&acm->read_lock); 939 old = acm->oldcount; 940 new = acm->iocount; 941 acm->oldcount = new; 942 spin_unlock_irq(&acm->read_lock); 943 944 if ((arg & TIOCM_DSR) && 945 old.dsr != new.dsr) 946 break; 947 if ((arg & TIOCM_CD) && 948 old.dcd != new.dcd) 949 break; 950 if ((arg & TIOCM_RI) && 951 old.rng != new.rng) 952 break; 953 954 add_wait_queue(&acm->wioctl, &wait); 955 set_current_state(TASK_INTERRUPTIBLE); 956 schedule(); 957 remove_wait_queue(&acm->wioctl, &wait); 958 if (acm->disconnected) { 959 if (arg & TIOCM_CD) 960 break; 961 else 962 rv = -ENODEV; 963 } else { 964 if (signal_pending(current)) 965 rv = -ERESTARTSYS; 966 } 967 } while (!rv); 968 969 970 971 return rv; 972 } 973 974 static int get_serial_usage(struct acm *acm, 975 struct serial_icounter_struct __user *count) 976 { 977 struct serial_icounter_struct icount; 978 int rv = 0; 979 980 memset(&icount, 0, sizeof(icount)); 981 icount.dsr = acm->iocount.dsr; 982 icount.rng = acm->iocount.rng; 983 icount.dcd = acm->iocount.dcd; 984 icount.frame = acm->iocount.frame; 985 icount.overrun = acm->iocount.overrun; 986 icount.parity = acm->iocount.parity; 987 icount.brk = acm->iocount.brk; 988 989 if (copy_to_user(count, &icount, sizeof(icount)) > 0) 990 rv = -EFAULT; 991 992 return rv; 993 } 994 995 static int acm_tty_ioctl(struct tty_struct *tty, 996 unsigned int cmd, unsigned long arg) 997 { 998 struct acm *acm = tty->driver_data; 999 int rv = -ENOIOCTLCMD; 1000 1001 switch (cmd) { 1002 case TIOCGSERIAL: /* gets serial port data */ 1003 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 1004 break; 1005 case TIOCSSERIAL: 1006 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 1007 break; 1008 case TIOCMIWAIT: 1009 rv = usb_autopm_get_interface(acm->control); 1010 if (rv < 0) { 1011 rv = -EIO; 1012 break; 1013 } 1014 rv = wait_serial_change(acm, arg); 1015 usb_autopm_put_interface(acm->control); 1016 break; 1017 case TIOCGICOUNT: 1018 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg); 1019 break; 1020 } 1021 1022 return rv; 1023 } 1024 1025 static void acm_tty_set_termios(struct tty_struct *tty, 1026 struct ktermios *termios_old) 1027 { 1028 struct acm *acm = tty->driver_data; 1029 struct ktermios *termios = &tty->termios; 1030 struct usb_cdc_line_coding newline; 1031 int newctrl = acm->ctrlout; 1032 1033 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1034 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1035 newline.bParityType = termios->c_cflag & PARENB ? 1036 (termios->c_cflag & PARODD ? 1 : 2) + 1037 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1038 switch (termios->c_cflag & CSIZE) { 1039 case CS5: 1040 newline.bDataBits = 5; 1041 break; 1042 case CS6: 1043 newline.bDataBits = 6; 1044 break; 1045 case CS7: 1046 newline.bDataBits = 7; 1047 break; 1048 case CS8: 1049 default: 1050 newline.bDataBits = 8; 1051 break; 1052 } 1053 /* FIXME: Needs to clear unsupported bits in the termios */ 1054 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1055 1056 if (C_BAUD(tty) == B0) { 1057 newline.dwDTERate = acm->line.dwDTERate; 1058 newctrl &= ~ACM_CTRL_DTR; 1059 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1060 newctrl |= ACM_CTRL_DTR; 1061 } 1062 1063 if (newctrl != acm->ctrlout) 1064 acm_set_control(acm, acm->ctrlout = newctrl); 1065 1066 if (memcmp(&acm->line, &newline, sizeof newline)) { 1067 memcpy(&acm->line, &newline, sizeof newline); 1068 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1069 __func__, 1070 le32_to_cpu(newline.dwDTERate), 1071 newline.bCharFormat, newline.bParityType, 1072 newline.bDataBits); 1073 acm_set_line(acm, &acm->line); 1074 } 1075 } 1076 1077 static const struct tty_port_operations acm_port_ops = { 1078 .dtr_rts = acm_port_dtr_rts, 1079 .shutdown = acm_port_shutdown, 1080 .activate = acm_port_activate, 1081 .destruct = acm_port_destruct, 1082 }; 1083 1084 /* 1085 * USB probe and disconnect routines. 1086 */ 1087 1088 /* Little helpers: write/read buffers free */ 1089 static void acm_write_buffers_free(struct acm *acm) 1090 { 1091 int i; 1092 struct acm_wb *wb; 1093 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1094 1095 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1096 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); 1097 } 1098 1099 static void acm_read_buffers_free(struct acm *acm) 1100 { 1101 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1102 int i; 1103 1104 for (i = 0; i < acm->rx_buflimit; i++) 1105 usb_free_coherent(usb_dev, acm->readsize, 1106 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1107 } 1108 1109 /* Little helper: write buffers allocate */ 1110 static int acm_write_buffers_alloc(struct acm *acm) 1111 { 1112 int i; 1113 struct acm_wb *wb; 1114 1115 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1116 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1117 &wb->dmah); 1118 if (!wb->buf) { 1119 while (i != 0) { 1120 --i; 1121 --wb; 1122 usb_free_coherent(acm->dev, acm->writesize, 1123 wb->buf, wb->dmah); 1124 } 1125 return -ENOMEM; 1126 } 1127 } 1128 return 0; 1129 } 1130 1131 static int acm_probe(struct usb_interface *intf, 1132 const struct usb_device_id *id) 1133 { 1134 struct usb_cdc_union_desc *union_header = NULL; 1135 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1136 unsigned char *buffer = intf->altsetting->extra; 1137 int buflen = intf->altsetting->extralen; 1138 struct usb_interface *control_interface; 1139 struct usb_interface *data_interface; 1140 struct usb_endpoint_descriptor *epctrl = NULL; 1141 struct usb_endpoint_descriptor *epread = NULL; 1142 struct usb_endpoint_descriptor *epwrite = NULL; 1143 struct usb_device *usb_dev = interface_to_usbdev(intf); 1144 struct usb_cdc_parsed_header h; 1145 struct acm *acm; 1146 int minor; 1147 int ctrlsize, readsize; 1148 u8 *buf; 1149 int call_intf_num = -1; 1150 int data_intf_num = -1; 1151 unsigned long quirks; 1152 int num_rx_buf; 1153 int i; 1154 int combined_interfaces = 0; 1155 struct device *tty_dev; 1156 int rv = -ENOMEM; 1157 1158 /* normal quirks */ 1159 quirks = (unsigned long)id->driver_info; 1160 1161 if (quirks == IGNORE_DEVICE) 1162 return -ENODEV; 1163 1164 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1165 1166 /* handle quirks deadly to normal probing*/ 1167 if (quirks == NO_UNION_NORMAL) { 1168 data_interface = usb_ifnum_to_if(usb_dev, 1); 1169 control_interface = usb_ifnum_to_if(usb_dev, 0); 1170 /* we would crash */ 1171 if (!data_interface || !control_interface) 1172 return -ENODEV; 1173 goto skip_normal_probe; 1174 } 1175 1176 /* normal probing*/ 1177 if (!buffer) { 1178 dev_err(&intf->dev, "Weird descriptor references\n"); 1179 return -EINVAL; 1180 } 1181 1182 if (!intf->cur_altsetting) 1183 return -EINVAL; 1184 1185 if (!buflen) { 1186 if (intf->cur_altsetting->endpoint && 1187 intf->cur_altsetting->endpoint->extralen && 1188 intf->cur_altsetting->endpoint->extra) { 1189 dev_dbg(&intf->dev, 1190 "Seeking extra descriptors on endpoint\n"); 1191 buflen = intf->cur_altsetting->endpoint->extralen; 1192 buffer = intf->cur_altsetting->endpoint->extra; 1193 } else { 1194 dev_err(&intf->dev, 1195 "Zero length descriptor references\n"); 1196 return -EINVAL; 1197 } 1198 } 1199 1200 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1201 union_header = h.usb_cdc_union_desc; 1202 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1203 if (cmgmd) 1204 call_intf_num = cmgmd->bDataInterface; 1205 1206 if (!union_header) { 1207 if (call_intf_num > 0) { 1208 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1209 /* quirks for Droids MuIn LCD */ 1210 if (quirks & NO_DATA_INTERFACE) { 1211 data_interface = usb_ifnum_to_if(usb_dev, 0); 1212 } else { 1213 data_intf_num = call_intf_num; 1214 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1215 } 1216 control_interface = intf; 1217 } else { 1218 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1219 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1220 return -ENODEV; 1221 } else { 1222 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1223 combined_interfaces = 1; 1224 control_interface = data_interface = intf; 1225 goto look_for_collapsed_interface; 1226 } 1227 } 1228 } else { 1229 data_intf_num = union_header->bSlaveInterface0; 1230 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1231 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1232 } 1233 1234 if (!control_interface || !data_interface) { 1235 dev_dbg(&intf->dev, "no interfaces\n"); 1236 return -ENODEV; 1237 } 1238 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1239 return -ENODEV; 1240 1241 if (data_intf_num != call_intf_num) 1242 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1243 1244 if (control_interface == data_interface) { 1245 /* some broken devices designed for windows work this way */ 1246 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1247 combined_interfaces = 1; 1248 /* a popular other OS doesn't use it */ 1249 quirks |= NO_CAP_LINE; 1250 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1251 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1252 return -EINVAL; 1253 } 1254 look_for_collapsed_interface: 1255 for (i = 0; i < 3; i++) { 1256 struct usb_endpoint_descriptor *ep; 1257 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1258 1259 if (usb_endpoint_is_int_in(ep)) 1260 epctrl = ep; 1261 else if (usb_endpoint_is_bulk_out(ep)) 1262 epwrite = ep; 1263 else if (usb_endpoint_is_bulk_in(ep)) 1264 epread = ep; 1265 else 1266 return -EINVAL; 1267 } 1268 if (!epctrl || !epread || !epwrite) 1269 return -ENODEV; 1270 else 1271 goto made_compressed_probe; 1272 } 1273 1274 skip_normal_probe: 1275 1276 /*workaround for switched interfaces */ 1277 if (data_interface->cur_altsetting->desc.bInterfaceClass 1278 != CDC_DATA_INTERFACE_TYPE) { 1279 if (control_interface->cur_altsetting->desc.bInterfaceClass 1280 == CDC_DATA_INTERFACE_TYPE) { 1281 dev_dbg(&intf->dev, 1282 "Your device has switched interfaces.\n"); 1283 swap(control_interface, data_interface); 1284 } else { 1285 return -EINVAL; 1286 } 1287 } 1288 1289 /* Accept probe requests only for the control interface */ 1290 if (!combined_interfaces && intf != control_interface) 1291 return -ENODEV; 1292 1293 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1294 /* valid in this context */ 1295 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1296 return -EBUSY; 1297 } 1298 1299 1300 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1301 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1302 return -EINVAL; 1303 1304 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1305 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1306 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1307 1308 1309 /* workaround for switched endpoints */ 1310 if (!usb_endpoint_dir_in(epread)) { 1311 /* descriptors are swapped */ 1312 dev_dbg(&intf->dev, 1313 "The data interface has switched endpoints\n"); 1314 swap(epread, epwrite); 1315 } 1316 made_compressed_probe: 1317 dev_dbg(&intf->dev, "interfaces are valid\n"); 1318 1319 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1320 if (acm == NULL) 1321 goto alloc_fail; 1322 1323 minor = acm_alloc_minor(acm); 1324 if (minor < 0) 1325 goto alloc_fail1; 1326 1327 ctrlsize = usb_endpoint_maxp(epctrl); 1328 readsize = usb_endpoint_maxp(epread) * 1329 (quirks == SINGLE_RX_URB ? 1 : 2); 1330 acm->combined_interfaces = combined_interfaces; 1331 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1332 acm->control = control_interface; 1333 acm->data = data_interface; 1334 acm->minor = minor; 1335 acm->dev = usb_dev; 1336 if (h.usb_cdc_acm_descriptor) 1337 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1338 if (quirks & NO_CAP_LINE) 1339 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1340 acm->ctrlsize = ctrlsize; 1341 acm->readsize = readsize; 1342 acm->rx_buflimit = num_rx_buf; 1343 INIT_WORK(&acm->work, acm_softint); 1344 init_waitqueue_head(&acm->wioctl); 1345 spin_lock_init(&acm->write_lock); 1346 spin_lock_init(&acm->read_lock); 1347 mutex_init(&acm->mutex); 1348 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1349 if (acm->is_int_ep) 1350 acm->bInterval = epread->bInterval; 1351 tty_port_init(&acm->port); 1352 acm->port.ops = &acm_port_ops; 1353 init_usb_anchor(&acm->delayed); 1354 acm->quirks = quirks; 1355 1356 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1357 if (!buf) 1358 goto alloc_fail2; 1359 acm->ctrl_buffer = buf; 1360 1361 if (acm_write_buffers_alloc(acm) < 0) 1362 goto alloc_fail4; 1363 1364 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1365 if (!acm->ctrlurb) 1366 goto alloc_fail5; 1367 1368 for (i = 0; i < num_rx_buf; i++) { 1369 struct acm_rb *rb = &(acm->read_buffers[i]); 1370 struct urb *urb; 1371 1372 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1373 &rb->dma); 1374 if (!rb->base) 1375 goto alloc_fail6; 1376 rb->index = i; 1377 rb->instance = acm; 1378 1379 urb = usb_alloc_urb(0, GFP_KERNEL); 1380 if (!urb) 1381 goto alloc_fail6; 1382 1383 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1384 urb->transfer_dma = rb->dma; 1385 if (acm->is_int_ep) { 1386 usb_fill_int_urb(urb, acm->dev, 1387 usb_rcvintpipe(usb_dev, epread->bEndpointAddress), 1388 rb->base, 1389 acm->readsize, 1390 acm_read_bulk_callback, rb, 1391 acm->bInterval); 1392 } else { 1393 usb_fill_bulk_urb(urb, acm->dev, 1394 usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress), 1395 rb->base, 1396 acm->readsize, 1397 acm_read_bulk_callback, rb); 1398 } 1399 1400 acm->read_urbs[i] = urb; 1401 __set_bit(i, &acm->read_urbs_free); 1402 } 1403 for (i = 0; i < ACM_NW; i++) { 1404 struct acm_wb *snd = &(acm->wb[i]); 1405 1406 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1407 if (snd->urb == NULL) 1408 goto alloc_fail7; 1409 1410 if (usb_endpoint_xfer_int(epwrite)) 1411 usb_fill_int_urb(snd->urb, usb_dev, 1412 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), 1413 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1414 else 1415 usb_fill_bulk_urb(snd->urb, usb_dev, 1416 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), 1417 NULL, acm->writesize, acm_write_bulk, snd); 1418 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1419 if (quirks & SEND_ZERO_PACKET) 1420 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1421 snd->instance = acm; 1422 } 1423 1424 usb_set_intfdata(intf, acm); 1425 1426 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1427 if (i < 0) 1428 goto alloc_fail7; 1429 1430 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1431 struct usb_cdc_country_functional_desc * cfd = 1432 h.usb_cdc_country_functional_desc; 1433 1434 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1435 if (!acm->country_codes) 1436 goto skip_countries; 1437 acm->country_code_size = cfd->bLength - 4; 1438 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1439 cfd->bLength - 4); 1440 acm->country_rel_date = cfd->iCountryCodeRelDate; 1441 1442 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1443 if (i < 0) { 1444 kfree(acm->country_codes); 1445 acm->country_codes = NULL; 1446 acm->country_code_size = 0; 1447 goto skip_countries; 1448 } 1449 1450 i = device_create_file(&intf->dev, 1451 &dev_attr_iCountryCodeRelDate); 1452 if (i < 0) { 1453 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1454 kfree(acm->country_codes); 1455 acm->country_codes = NULL; 1456 acm->country_code_size = 0; 1457 goto skip_countries; 1458 } 1459 } 1460 1461 skip_countries: 1462 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1463 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1464 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1465 /* works around buggy devices */ 1466 epctrl->bInterval ? epctrl->bInterval : 16); 1467 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1468 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1469 1470 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1471 1472 acm->line.dwDTERate = cpu_to_le32(9600); 1473 acm->line.bDataBits = 8; 1474 acm_set_line(acm, &acm->line); 1475 1476 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1477 usb_set_intfdata(data_interface, acm); 1478 1479 usb_get_intf(control_interface); 1480 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1481 &control_interface->dev); 1482 if (IS_ERR(tty_dev)) { 1483 rv = PTR_ERR(tty_dev); 1484 goto alloc_fail8; 1485 } 1486 1487 if (quirks & CLEAR_HALT_CONDITIONS) { 1488 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress)); 1489 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress)); 1490 } 1491 1492 return 0; 1493 alloc_fail8: 1494 if (acm->country_codes) { 1495 device_remove_file(&acm->control->dev, 1496 &dev_attr_wCountryCodes); 1497 device_remove_file(&acm->control->dev, 1498 &dev_attr_iCountryCodeRelDate); 1499 kfree(acm->country_codes); 1500 } 1501 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1502 alloc_fail7: 1503 usb_set_intfdata(intf, NULL); 1504 for (i = 0; i < ACM_NW; i++) 1505 usb_free_urb(acm->wb[i].urb); 1506 alloc_fail6: 1507 for (i = 0; i < num_rx_buf; i++) 1508 usb_free_urb(acm->read_urbs[i]); 1509 acm_read_buffers_free(acm); 1510 usb_free_urb(acm->ctrlurb); 1511 alloc_fail5: 1512 acm_write_buffers_free(acm); 1513 alloc_fail4: 1514 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1515 alloc_fail2: 1516 acm_release_minor(acm); 1517 alloc_fail1: 1518 kfree(acm); 1519 alloc_fail: 1520 return rv; 1521 } 1522 1523 static void stop_data_traffic(struct acm *acm) 1524 { 1525 int i; 1526 1527 usb_kill_urb(acm->ctrlurb); 1528 for (i = 0; i < ACM_NW; i++) 1529 usb_kill_urb(acm->wb[i].urb); 1530 for (i = 0; i < acm->rx_buflimit; i++) 1531 usb_kill_urb(acm->read_urbs[i]); 1532 1533 cancel_work_sync(&acm->work); 1534 } 1535 1536 static void acm_disconnect(struct usb_interface *intf) 1537 { 1538 struct acm *acm = usb_get_intfdata(intf); 1539 struct usb_device *usb_dev = interface_to_usbdev(intf); 1540 struct tty_struct *tty; 1541 int i; 1542 1543 /* sibling interface is already cleaning up */ 1544 if (!acm) 1545 return; 1546 1547 mutex_lock(&acm->mutex); 1548 acm->disconnected = true; 1549 if (acm->country_codes) { 1550 device_remove_file(&acm->control->dev, 1551 &dev_attr_wCountryCodes); 1552 device_remove_file(&acm->control->dev, 1553 &dev_attr_iCountryCodeRelDate); 1554 } 1555 wake_up_all(&acm->wioctl); 1556 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1557 usb_set_intfdata(acm->control, NULL); 1558 usb_set_intfdata(acm->data, NULL); 1559 mutex_unlock(&acm->mutex); 1560 1561 tty = tty_port_tty_get(&acm->port); 1562 if (tty) { 1563 tty_vhangup(tty); 1564 tty_kref_put(tty); 1565 } 1566 1567 stop_data_traffic(acm); 1568 1569 tty_unregister_device(acm_tty_driver, acm->minor); 1570 1571 usb_free_urb(acm->ctrlurb); 1572 for (i = 0; i < ACM_NW; i++) 1573 usb_free_urb(acm->wb[i].urb); 1574 for (i = 0; i < acm->rx_buflimit; i++) 1575 usb_free_urb(acm->read_urbs[i]); 1576 acm_write_buffers_free(acm); 1577 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1578 acm_read_buffers_free(acm); 1579 1580 if (!acm->combined_interfaces) 1581 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1582 acm->data : acm->control); 1583 1584 tty_port_put(&acm->port); 1585 } 1586 1587 #ifdef CONFIG_PM 1588 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1589 { 1590 struct acm *acm = usb_get_intfdata(intf); 1591 int cnt; 1592 1593 spin_lock_irq(&acm->write_lock); 1594 if (PMSG_IS_AUTO(message)) { 1595 if (acm->transmitting) { 1596 spin_unlock_irq(&acm->write_lock); 1597 return -EBUSY; 1598 } 1599 } 1600 cnt = acm->susp_count++; 1601 spin_unlock_irq(&acm->write_lock); 1602 1603 if (cnt) 1604 return 0; 1605 1606 stop_data_traffic(acm); 1607 1608 return 0; 1609 } 1610 1611 static int acm_resume(struct usb_interface *intf) 1612 { 1613 struct acm *acm = usb_get_intfdata(intf); 1614 struct urb *urb; 1615 int rv = 0; 1616 1617 spin_lock_irq(&acm->write_lock); 1618 1619 if (--acm->susp_count) 1620 goto out; 1621 1622 if (tty_port_initialized(&acm->port)) { 1623 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1624 1625 for (;;) { 1626 urb = usb_get_from_anchor(&acm->delayed); 1627 if (!urb) 1628 break; 1629 1630 acm_start_wb(acm, urb->context); 1631 } 1632 1633 /* 1634 * delayed error checking because we must 1635 * do the write path at all cost 1636 */ 1637 if (rv < 0) 1638 goto out; 1639 1640 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1641 } 1642 out: 1643 spin_unlock_irq(&acm->write_lock); 1644 1645 return rv; 1646 } 1647 1648 static int acm_reset_resume(struct usb_interface *intf) 1649 { 1650 struct acm *acm = usb_get_intfdata(intf); 1651 1652 if (tty_port_initialized(&acm->port)) 1653 tty_port_tty_hangup(&acm->port, false); 1654 1655 return acm_resume(intf); 1656 } 1657 1658 #endif /* CONFIG_PM */ 1659 1660 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1661 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1662 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1663 USB_CDC_ACM_PROTO_VENDOR) 1664 1665 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1666 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1667 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1668 USB_CDC_ACM_PROTO_VENDOR) 1669 1670 /* 1671 * USB driver structure. 1672 */ 1673 1674 static const struct usb_device_id acm_ids[] = { 1675 /* quirky and broken devices */ 1676 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1677 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1678 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1679 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1680 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1681 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1682 }, 1683 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1684 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1685 }, 1686 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1687 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1688 }, 1689 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1690 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1691 }, 1692 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1693 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1694 }, 1695 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1696 .driver_info = SINGLE_RX_URB, 1697 }, 1698 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1699 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1700 }, 1701 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1702 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1703 }, 1704 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1705 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1706 }, 1707 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1708 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1709 }, 1710 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1711 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1712 }, 1713 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1714 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1715 }, 1716 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1717 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1718 }, 1719 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1720 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1721 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1722 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1723 }, 1724 /* Motorola H24 HSPA module: */ 1725 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1726 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1727 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1728 }, 1729 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1730 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1731 }, 1732 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1733 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1734 }, 1735 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1736 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1737 }, 1738 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1739 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1740 }, 1741 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1742 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1743 }, 1744 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1745 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1746 }, 1747 1748 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1749 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1750 data interface instead of 1751 communications interface. 1752 Maybe we should define a new 1753 quirk for this. */ 1754 }, 1755 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1756 .driver_info = NO_UNION_NORMAL, 1757 }, 1758 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1759 .driver_info = NO_UNION_NORMAL, 1760 }, 1761 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1762 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1763 }, 1764 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1765 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1766 }, 1767 1768 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1769 .driver_info = CLEAR_HALT_CONDITIONS, 1770 }, 1771 1772 /* Nokia S60 phones expose two ACM channels. The first is 1773 * a modem and is picked up by the standard AT-command 1774 * information below. The second is 'vendor-specific' but 1775 * is treated as a serial device at the S60 end, so we want 1776 * to expose it on Linux too. */ 1777 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1778 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1779 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1780 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1781 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1782 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1783 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1784 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1785 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1786 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1787 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1788 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1789 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1790 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1791 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1792 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1793 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1794 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1795 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1796 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1797 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1798 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1799 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1800 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1801 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1802 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1803 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1804 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1805 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1806 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1807 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1808 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1809 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1810 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1811 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1812 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1813 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1814 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1815 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1816 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1817 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1818 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1820 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1821 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1822 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1823 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1824 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1825 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1826 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1827 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1828 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1829 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1830 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1834 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1835 1836 /* Support for Owen devices */ 1837 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1838 1839 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1840 1841 /* Support for Droids MuIn LCD */ 1842 { USB_DEVICE(0x04d8, 0x000b), 1843 .driver_info = NO_DATA_INTERFACE, 1844 }, 1845 1846 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1847 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1848 .driver_info = IGNORE_DEVICE, 1849 }, 1850 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1851 .driver_info = IGNORE_DEVICE, 1852 }, 1853 #endif 1854 1855 /*Samsung phone in firmware update mode */ 1856 { USB_DEVICE(0x04e8, 0x685d), 1857 .driver_info = IGNORE_DEVICE, 1858 }, 1859 1860 /* Exclude Infineon Flash Loader utility */ 1861 { USB_DEVICE(0x058b, 0x0041), 1862 .driver_info = IGNORE_DEVICE, 1863 }, 1864 1865 /* control interfaces without any protocol set */ 1866 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1867 USB_CDC_PROTO_NONE) }, 1868 1869 /* control interfaces with various AT-command sets */ 1870 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1871 USB_CDC_ACM_PROTO_AT_V25TER) }, 1872 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1873 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1874 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1875 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1876 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1877 USB_CDC_ACM_PROTO_AT_GSM) }, 1878 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1879 USB_CDC_ACM_PROTO_AT_3G) }, 1880 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1881 USB_CDC_ACM_PROTO_AT_CDMA) }, 1882 1883 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1884 .driver_info = SEND_ZERO_PACKET, 1885 }, 1886 1887 { } 1888 }; 1889 1890 MODULE_DEVICE_TABLE(usb, acm_ids); 1891 1892 static struct usb_driver acm_driver = { 1893 .name = "cdc_acm", 1894 .probe = acm_probe, 1895 .disconnect = acm_disconnect, 1896 #ifdef CONFIG_PM 1897 .suspend = acm_suspend, 1898 .resume = acm_resume, 1899 .reset_resume = acm_reset_resume, 1900 #endif 1901 .id_table = acm_ids, 1902 #ifdef CONFIG_PM 1903 .supports_autosuspend = 1, 1904 #endif 1905 .disable_hub_initiated_lpm = 1, 1906 }; 1907 1908 /* 1909 * TTY driver structures. 1910 */ 1911 1912 static const struct tty_operations acm_ops = { 1913 .install = acm_tty_install, 1914 .open = acm_tty_open, 1915 .close = acm_tty_close, 1916 .cleanup = acm_tty_cleanup, 1917 .hangup = acm_tty_hangup, 1918 .write = acm_tty_write, 1919 .put_char = acm_tty_put_char, 1920 .flush_chars = acm_tty_flush_chars, 1921 .write_room = acm_tty_write_room, 1922 .ioctl = acm_tty_ioctl, 1923 .throttle = acm_tty_throttle, 1924 .unthrottle = acm_tty_unthrottle, 1925 .chars_in_buffer = acm_tty_chars_in_buffer, 1926 .break_ctl = acm_tty_break_ctl, 1927 .set_termios = acm_tty_set_termios, 1928 .tiocmget = acm_tty_tiocmget, 1929 .tiocmset = acm_tty_tiocmset, 1930 }; 1931 1932 /* 1933 * Init / exit. 1934 */ 1935 1936 static int __init acm_init(void) 1937 { 1938 int retval; 1939 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1940 if (!acm_tty_driver) 1941 return -ENOMEM; 1942 acm_tty_driver->driver_name = "acm", 1943 acm_tty_driver->name = "ttyACM", 1944 acm_tty_driver->major = ACM_TTY_MAJOR, 1945 acm_tty_driver->minor_start = 0, 1946 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1947 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1948 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1949 acm_tty_driver->init_termios = tty_std_termios; 1950 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1951 HUPCL | CLOCAL; 1952 tty_set_operations(acm_tty_driver, &acm_ops); 1953 1954 retval = tty_register_driver(acm_tty_driver); 1955 if (retval) { 1956 put_tty_driver(acm_tty_driver); 1957 return retval; 1958 } 1959 1960 retval = usb_register(&acm_driver); 1961 if (retval) { 1962 tty_unregister_driver(acm_tty_driver); 1963 put_tty_driver(acm_tty_driver); 1964 return retval; 1965 } 1966 1967 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1968 1969 return 0; 1970 } 1971 1972 static void __exit acm_exit(void) 1973 { 1974 usb_deregister(&acm_driver); 1975 tty_unregister_driver(acm_tty_driver); 1976 put_tty_driver(acm_tty_driver); 1977 idr_destroy(&acm_minors); 1978 } 1979 1980 module_init(acm_init); 1981 module_exit(acm_exit); 1982 1983 MODULE_AUTHOR(DRIVER_AUTHOR); 1984 MODULE_DESCRIPTION(DRIVER_DESC); 1985 MODULE_LICENSE("GPL"); 1986 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 1987