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