1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * cdc-acm.c 4 * 5 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 6 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 7 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 8 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 9 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 10 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 11 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 12 * 13 * USB Abstract Control Model driver for USB modems and ISDN adapters 14 * 15 * Sponsored by SuSE 16 */ 17 18 #undef DEBUG 19 #undef VERBOSE_DEBUG 20 21 #include <linux/kernel.h> 22 #include <linux/sched/signal.h> 23 #include <linux/errno.h> 24 #include <linux/init.h> 25 #include <linux/slab.h> 26 #include <linux/log2.h> 27 #include <linux/tty.h> 28 #include <linux/serial.h> 29 #include <linux/tty_driver.h> 30 #include <linux/tty_flip.h> 31 #include <linux/module.h> 32 #include <linux/mutex.h> 33 #include <linux/uaccess.h> 34 #include <linux/usb.h> 35 #include <linux/usb/cdc.h> 36 #include <asm/byteorder.h> 37 #include <asm/unaligned.h> 38 #include <linux/idr.h> 39 #include <linux/list.h> 40 41 #include "cdc-acm.h" 42 43 44 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 45 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 46 47 static struct usb_driver acm_driver; 48 static struct tty_driver *acm_tty_driver; 49 50 static DEFINE_IDR(acm_minors); 51 static DEFINE_MUTEX(acm_minors_lock); 52 53 static void acm_tty_set_termios(struct tty_struct *tty, 54 struct ktermios *termios_old); 55 56 /* 57 * acm_minors accessors 58 */ 59 60 /* 61 * Look up an ACM structure by minor. If found and not disconnected, increment 62 * its refcount and return it with its mutex held. 63 */ 64 static struct acm *acm_get_by_minor(unsigned int minor) 65 { 66 struct acm *acm; 67 68 mutex_lock(&acm_minors_lock); 69 acm = idr_find(&acm_minors, minor); 70 if (acm) { 71 mutex_lock(&acm->mutex); 72 if (acm->disconnected) { 73 mutex_unlock(&acm->mutex); 74 acm = NULL; 75 } else { 76 tty_port_get(&acm->port); 77 mutex_unlock(&acm->mutex); 78 } 79 } 80 mutex_unlock(&acm_minors_lock); 81 return acm; 82 } 83 84 /* 85 * Try to find an available minor number and if found, associate it with 'acm'. 86 */ 87 static int acm_alloc_minor(struct acm *acm) 88 { 89 int minor; 90 91 mutex_lock(&acm_minors_lock); 92 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 93 mutex_unlock(&acm_minors_lock); 94 95 return minor; 96 } 97 98 /* Release the minor number associated with 'acm'. */ 99 static void acm_release_minor(struct acm *acm) 100 { 101 mutex_lock(&acm_minors_lock); 102 idr_remove(&acm_minors, acm->minor); 103 mutex_unlock(&acm_minors_lock); 104 } 105 106 /* 107 * Functions for ACM control messages. 108 */ 109 110 static int acm_ctrl_msg(struct acm *acm, int request, int value, 111 void *buf, int len) 112 { 113 int retval; 114 115 retval = usb_autopm_get_interface(acm->control); 116 if (retval) 117 return retval; 118 119 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 120 request, USB_RT_ACM, value, 121 acm->control->altsetting[0].desc.bInterfaceNumber, 122 buf, len, 5000); 123 124 dev_dbg(&acm->control->dev, 125 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 126 __func__, request, value, len, retval); 127 128 usb_autopm_put_interface(acm->control); 129 130 return retval < 0 ? retval : 0; 131 } 132 133 /* devices aren't required to support these requests. 134 * the cdc acm descriptor tells whether they do... 135 */ 136 static inline int acm_set_control(struct acm *acm, int control) 137 { 138 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 139 return -EOPNOTSUPP; 140 141 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 142 control, NULL, 0); 143 } 144 145 #define acm_set_line(acm, line) \ 146 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 147 #define acm_send_break(acm, ms) \ 148 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 149 150 static void acm_kill_urbs(struct acm *acm) 151 { 152 int i; 153 154 usb_kill_urb(acm->ctrlurb); 155 for (i = 0; i < ACM_NW; i++) 156 usb_kill_urb(acm->wb[i].urb); 157 for (i = 0; i < acm->rx_buflimit; i++) 158 usb_kill_urb(acm->read_urbs[i]); 159 } 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 = true; 177 wb->len = 0; 178 return wbn; 179 } 180 wbn = (wbn + 1) % ACM_NW; 181 if (++i >= ACM_NW) 182 return -1; 183 } 184 } 185 186 static int acm_wb_is_avail(struct acm *acm) 187 { 188 int i, n; 189 unsigned long flags; 190 191 n = ACM_NW; 192 spin_lock_irqsave(&acm->write_lock, flags); 193 for (i = 0; i < ACM_NW; i++) 194 if(acm->wb[i].use) 195 n--; 196 spin_unlock_irqrestore(&acm->write_lock, flags); 197 return n; 198 } 199 200 /* 201 * Finish write. Caller must hold acm->write_lock 202 */ 203 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 204 { 205 wb->use = false; 206 acm->transmitting--; 207 usb_autopm_put_interface_async(acm->control); 208 } 209 210 /* 211 * Poke write. 212 * 213 * the caller is responsible for locking 214 */ 215 216 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 217 { 218 int rc; 219 220 acm->transmitting++; 221 222 wb->urb->transfer_buffer = wb->buf; 223 wb->urb->transfer_dma = wb->dmah; 224 wb->urb->transfer_buffer_length = wb->len; 225 wb->urb->dev = acm->dev; 226 227 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 228 if (rc < 0) { 229 dev_err(&acm->data->dev, 230 "%s - usb_submit_urb(write bulk) failed: %d\n", 231 __func__, rc); 232 acm_write_done(acm, wb); 233 } 234 return rc; 235 } 236 237 /* 238 * attributes exported through sysfs 239 */ 240 static ssize_t bmCapabilities_show 241 (struct device *dev, struct device_attribute *attr, char *buf) 242 { 243 struct usb_interface *intf = to_usb_interface(dev); 244 struct acm *acm = usb_get_intfdata(intf); 245 246 return sprintf(buf, "%d", acm->ctrl_caps); 247 } 248 static DEVICE_ATTR_RO(bmCapabilities); 249 250 static ssize_t wCountryCodes_show 251 (struct device *dev, struct device_attribute *attr, char *buf) 252 { 253 struct usb_interface *intf = to_usb_interface(dev); 254 struct acm *acm = usb_get_intfdata(intf); 255 256 memcpy(buf, acm->country_codes, acm->country_code_size); 257 return acm->country_code_size; 258 } 259 260 static DEVICE_ATTR_RO(wCountryCodes); 261 262 static ssize_t iCountryCodeRelDate_show 263 (struct device *dev, struct device_attribute *attr, char *buf) 264 { 265 struct usb_interface *intf = to_usb_interface(dev); 266 struct acm *acm = usb_get_intfdata(intf); 267 268 return sprintf(buf, "%d", acm->country_rel_date); 269 } 270 271 static DEVICE_ATTR_RO(iCountryCodeRelDate); 272 /* 273 * Interrupt handlers for various ACM device responses 274 */ 275 276 static void acm_process_notification(struct acm *acm, unsigned char *buf) 277 { 278 int newctrl; 279 int difference; 280 unsigned long flags; 281 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 282 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 283 284 switch (dr->bNotificationType) { 285 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 286 dev_dbg(&acm->control->dev, 287 "%s - network connection: %d\n", __func__, dr->wValue); 288 break; 289 290 case USB_CDC_NOTIFY_SERIAL_STATE: 291 if (le16_to_cpu(dr->wLength) != 2) { 292 dev_dbg(&acm->control->dev, 293 "%s - malformed serial state\n", __func__); 294 break; 295 } 296 297 newctrl = get_unaligned_le16(data); 298 dev_dbg(&acm->control->dev, 299 "%s - serial state: 0x%x\n", __func__, newctrl); 300 301 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 302 dev_dbg(&acm->control->dev, 303 "%s - calling hangup\n", __func__); 304 tty_port_tty_hangup(&acm->port, false); 305 } 306 307 difference = acm->ctrlin ^ newctrl; 308 spin_lock_irqsave(&acm->read_lock, flags); 309 acm->ctrlin = newctrl; 310 acm->oldcount = acm->iocount; 311 312 if (difference & ACM_CTRL_DSR) 313 acm->iocount.dsr++; 314 if (difference & ACM_CTRL_DCD) 315 acm->iocount.dcd++; 316 if (newctrl & ACM_CTRL_BRK) 317 acm->iocount.brk++; 318 if (newctrl & ACM_CTRL_RI) 319 acm->iocount.rng++; 320 if (newctrl & ACM_CTRL_FRAMING) 321 acm->iocount.frame++; 322 if (newctrl & ACM_CTRL_PARITY) 323 acm->iocount.parity++; 324 if (newctrl & ACM_CTRL_OVERRUN) 325 acm->iocount.overrun++; 326 spin_unlock_irqrestore(&acm->read_lock, flags); 327 328 if (difference) 329 wake_up_all(&acm->wioctl); 330 331 break; 332 333 default: 334 dev_dbg(&acm->control->dev, 335 "%s - unknown notification %d received: index %d len %d\n", 336 __func__, 337 dr->bNotificationType, dr->wIndex, dr->wLength); 338 } 339 } 340 341 /* control interface reports status changes with "interrupt" transfers */ 342 static void acm_ctrl_irq(struct urb *urb) 343 { 344 struct acm *acm = urb->context; 345 struct usb_cdc_notification *dr = urb->transfer_buffer; 346 unsigned int current_size = urb->actual_length; 347 unsigned int expected_size, copy_size, alloc_size; 348 int retval; 349 int status = urb->status; 350 351 switch (status) { 352 case 0: 353 /* success */ 354 break; 355 case -ECONNRESET: 356 case -ENOENT: 357 case -ESHUTDOWN: 358 /* this urb is terminated, clean up */ 359 dev_dbg(&acm->control->dev, 360 "%s - urb shutting down with status: %d\n", 361 __func__, status); 362 return; 363 default: 364 dev_dbg(&acm->control->dev, 365 "%s - nonzero urb status received: %d\n", 366 __func__, status); 367 goto exit; 368 } 369 370 usb_mark_last_busy(acm->dev); 371 372 if (acm->nb_index) 373 dr = (struct usb_cdc_notification *)acm->notification_buffer; 374 375 /* size = notification-header + (optional) data */ 376 expected_size = sizeof(struct usb_cdc_notification) + 377 le16_to_cpu(dr->wLength); 378 379 if (current_size < expected_size) { 380 /* notification is transmitted fragmented, reassemble */ 381 if (acm->nb_size < expected_size) { 382 u8 *new_buffer; 383 alloc_size = roundup_pow_of_two(expected_size); 384 /* Final freeing is done on disconnect. */ 385 new_buffer = krealloc(acm->notification_buffer, 386 alloc_size, GFP_ATOMIC); 387 if (!new_buffer) { 388 acm->nb_index = 0; 389 goto exit; 390 } 391 392 acm->notification_buffer = new_buffer; 393 acm->nb_size = alloc_size; 394 dr = (struct usb_cdc_notification *)acm->notification_buffer; 395 } 396 397 copy_size = min(current_size, 398 expected_size - acm->nb_index); 399 400 memcpy(&acm->notification_buffer[acm->nb_index], 401 urb->transfer_buffer, copy_size); 402 acm->nb_index += copy_size; 403 current_size = acm->nb_index; 404 } 405 406 if (current_size >= expected_size) { 407 /* notification complete */ 408 acm_process_notification(acm, (unsigned char *)dr); 409 acm->nb_index = 0; 410 } 411 412 exit: 413 retval = usb_submit_urb(urb, GFP_ATOMIC); 414 if (retval && retval != -EPERM && retval != -ENODEV) 415 dev_err(&acm->control->dev, 416 "%s - usb_submit_urb failed: %d\n", __func__, retval); 417 else 418 dev_vdbg(&acm->control->dev, 419 "control resubmission terminated %d\n", retval); 420 } 421 422 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 423 { 424 int res; 425 426 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 427 return 0; 428 429 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 430 if (res) { 431 if (res != -EPERM && res != -ENODEV) { 432 dev_err(&acm->data->dev, 433 "urb %d failed submission with %d\n", 434 index, res); 435 } else { 436 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 437 } 438 set_bit(index, &acm->read_urbs_free); 439 return res; 440 } else { 441 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 442 } 443 444 return 0; 445 } 446 447 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 448 { 449 int res; 450 int i; 451 452 for (i = 0; i < acm->rx_buflimit; ++i) { 453 res = acm_submit_read_urb(acm, i, mem_flags); 454 if (res) 455 return res; 456 } 457 458 return 0; 459 } 460 461 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 462 { 463 if (!urb->actual_length) 464 return; 465 466 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 467 urb->actual_length); 468 tty_flip_buffer_push(&acm->port); 469 } 470 471 static void acm_read_bulk_callback(struct urb *urb) 472 { 473 struct acm_rb *rb = urb->context; 474 struct acm *acm = rb->instance; 475 int status = urb->status; 476 bool stopped = false; 477 bool stalled = false; 478 bool cooldown = false; 479 480 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 481 rb->index, urb->actual_length, status); 482 483 if (!acm->dev) { 484 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 485 return; 486 } 487 488 switch (status) { 489 case 0: 490 usb_mark_last_busy(acm->dev); 491 acm_process_read_urb(acm, urb); 492 break; 493 case -EPIPE: 494 set_bit(EVENT_RX_STALL, &acm->flags); 495 stalled = true; 496 break; 497 case -ENOENT: 498 case -ECONNRESET: 499 case -ESHUTDOWN: 500 dev_dbg(&acm->data->dev, 501 "%s - urb shutting down with status: %d\n", 502 __func__, status); 503 stopped = true; 504 break; 505 case -EOVERFLOW: 506 case -EPROTO: 507 dev_dbg(&acm->data->dev, 508 "%s - cooling babbling device\n", __func__); 509 usb_mark_last_busy(acm->dev); 510 set_bit(rb->index, &acm->urbs_in_error_delay); 511 set_bit(ACM_ERROR_DELAY, &acm->flags); 512 cooldown = true; 513 break; 514 default: 515 dev_dbg(&acm->data->dev, 516 "%s - nonzero urb status received: %d\n", 517 __func__, status); 518 break; 519 } 520 521 /* 522 * Make sure URB processing is done before marking as free to avoid 523 * racing with unthrottle() on another CPU. Matches the barriers 524 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 525 */ 526 smp_mb__before_atomic(); 527 set_bit(rb->index, &acm->read_urbs_free); 528 /* 529 * Make sure URB is marked as free before checking the throttled flag 530 * to avoid racing with unthrottle() on another CPU. Matches the 531 * smp_mb() in unthrottle(). 532 */ 533 smp_mb__after_atomic(); 534 535 if (stopped || stalled || cooldown) { 536 if (stalled) 537 schedule_delayed_work(&acm->dwork, 0); 538 else if (cooldown) 539 schedule_delayed_work(&acm->dwork, HZ / 2); 540 return; 541 } 542 543 if (test_bit(ACM_THROTTLED, &acm->flags)) 544 return; 545 546 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 547 } 548 549 /* data interface wrote those outgoing bytes */ 550 static void acm_write_bulk(struct urb *urb) 551 { 552 struct acm_wb *wb = urb->context; 553 struct acm *acm = wb->instance; 554 unsigned long flags; 555 int status = urb->status; 556 557 if (status || (urb->actual_length != urb->transfer_buffer_length)) 558 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 559 urb->actual_length, 560 urb->transfer_buffer_length, 561 status); 562 563 spin_lock_irqsave(&acm->write_lock, flags); 564 acm_write_done(acm, wb); 565 spin_unlock_irqrestore(&acm->write_lock, flags); 566 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 567 schedule_delayed_work(&acm->dwork, 0); 568 } 569 570 static void acm_softint(struct work_struct *work) 571 { 572 int i; 573 struct acm *acm = container_of(work, struct acm, dwork.work); 574 575 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 576 smp_mb(); /* against acm_suspend() */ 577 if (!acm->susp_count) { 578 for (i = 0; i < acm->rx_buflimit; i++) 579 usb_kill_urb(acm->read_urbs[i]); 580 usb_clear_halt(acm->dev, acm->in); 581 acm_submit_read_urbs(acm, GFP_KERNEL); 582 clear_bit(EVENT_RX_STALL, &acm->flags); 583 } 584 } 585 586 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 587 for (i = 0; i < acm->rx_buflimit; i++) 588 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 589 acm_submit_read_urb(acm, i, GFP_KERNEL); 590 } 591 592 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 593 tty_port_tty_wakeup(&acm->port); 594 } 595 596 /* 597 * TTY handlers 598 */ 599 600 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 601 { 602 struct acm *acm; 603 int retval; 604 605 acm = acm_get_by_minor(tty->index); 606 if (!acm) 607 return -ENODEV; 608 609 retval = tty_standard_install(driver, tty); 610 if (retval) 611 goto error_init_termios; 612 613 /* 614 * Suppress initial echoing for some devices which might send data 615 * immediately after acm driver has been installed. 616 */ 617 if (acm->quirks & DISABLE_ECHO) 618 tty->termios.c_lflag &= ~ECHO; 619 620 tty->driver_data = acm; 621 622 return 0; 623 624 error_init_termios: 625 tty_port_put(&acm->port); 626 return retval; 627 } 628 629 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 630 { 631 struct acm *acm = tty->driver_data; 632 633 return tty_port_open(&acm->port, tty, filp); 634 } 635 636 static void acm_port_dtr_rts(struct tty_port *port, int raise) 637 { 638 struct acm *acm = container_of(port, struct acm, port); 639 int val; 640 int res; 641 642 if (raise) 643 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 644 else 645 val = 0; 646 647 /* FIXME: add missing ctrlout locking throughout driver */ 648 acm->ctrlout = val; 649 650 res = acm_set_control(acm, val); 651 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 652 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 653 } 654 655 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 656 { 657 struct acm *acm = container_of(port, struct acm, port); 658 int retval = -ENODEV; 659 int i; 660 661 mutex_lock(&acm->mutex); 662 if (acm->disconnected) 663 goto disconnected; 664 665 retval = usb_autopm_get_interface(acm->control); 666 if (retval) 667 goto error_get_interface; 668 669 /* 670 * FIXME: Why do we need this? Allocating 64K of physically contiguous 671 * memory is really nasty... 672 */ 673 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 674 acm->control->needs_remote_wakeup = 1; 675 676 acm->ctrlurb->dev = acm->dev; 677 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 678 if (retval) { 679 dev_err(&acm->control->dev, 680 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 681 goto error_submit_urb; 682 } 683 684 acm_tty_set_termios(tty, NULL); 685 686 /* 687 * Unthrottle device in case the TTY was closed while throttled. 688 */ 689 clear_bit(ACM_THROTTLED, &acm->flags); 690 691 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 692 if (retval) 693 goto error_submit_read_urbs; 694 695 usb_autopm_put_interface(acm->control); 696 697 mutex_unlock(&acm->mutex); 698 699 return 0; 700 701 error_submit_read_urbs: 702 for (i = 0; i < acm->rx_buflimit; i++) 703 usb_kill_urb(acm->read_urbs[i]); 704 usb_kill_urb(acm->ctrlurb); 705 error_submit_urb: 706 usb_autopm_put_interface(acm->control); 707 error_get_interface: 708 disconnected: 709 mutex_unlock(&acm->mutex); 710 711 return usb_translate_errors(retval); 712 } 713 714 static void acm_port_destruct(struct tty_port *port) 715 { 716 struct acm *acm = container_of(port, struct acm, port); 717 718 acm_release_minor(acm); 719 usb_put_intf(acm->control); 720 kfree(acm->country_codes); 721 kfree(acm); 722 } 723 724 static void acm_port_shutdown(struct tty_port *port) 725 { 726 struct acm *acm = container_of(port, struct acm, port); 727 struct urb *urb; 728 struct acm_wb *wb; 729 730 /* 731 * Need to grab write_lock to prevent race with resume, but no need to 732 * hold it due to the tty-port initialised flag. 733 */ 734 spin_lock_irq(&acm->write_lock); 735 spin_unlock_irq(&acm->write_lock); 736 737 usb_autopm_get_interface_no_resume(acm->control); 738 acm->control->needs_remote_wakeup = 0; 739 usb_autopm_put_interface(acm->control); 740 741 for (;;) { 742 urb = usb_get_from_anchor(&acm->delayed); 743 if (!urb) 744 break; 745 wb = urb->context; 746 wb->use = false; 747 usb_autopm_put_interface_async(acm->control); 748 } 749 750 acm_kill_urbs(acm); 751 } 752 753 static void acm_tty_cleanup(struct tty_struct *tty) 754 { 755 struct acm *acm = tty->driver_data; 756 757 tty_port_put(&acm->port); 758 } 759 760 static void acm_tty_hangup(struct tty_struct *tty) 761 { 762 struct acm *acm = tty->driver_data; 763 764 tty_port_hangup(&acm->port); 765 } 766 767 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 768 { 769 struct acm *acm = tty->driver_data; 770 771 tty_port_close(&acm->port, tty, filp); 772 } 773 774 static int acm_tty_write(struct tty_struct *tty, 775 const unsigned char *buf, int count) 776 { 777 struct acm *acm = tty->driver_data; 778 int stat; 779 unsigned long flags; 780 int wbn; 781 struct acm_wb *wb; 782 783 if (!count) 784 return 0; 785 786 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 787 788 spin_lock_irqsave(&acm->write_lock, flags); 789 wbn = acm_wb_alloc(acm); 790 if (wbn < 0) { 791 spin_unlock_irqrestore(&acm->write_lock, flags); 792 return 0; 793 } 794 wb = &acm->wb[wbn]; 795 796 if (!acm->dev) { 797 wb->use = false; 798 spin_unlock_irqrestore(&acm->write_lock, flags); 799 return -ENODEV; 800 } 801 802 count = (count > acm->writesize) ? acm->writesize : count; 803 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 804 memcpy(wb->buf, buf, count); 805 wb->len = count; 806 807 stat = usb_autopm_get_interface_async(acm->control); 808 if (stat) { 809 wb->use = false; 810 spin_unlock_irqrestore(&acm->write_lock, flags); 811 return stat; 812 } 813 814 if (acm->susp_count) { 815 usb_anchor_urb(wb->urb, &acm->delayed); 816 spin_unlock_irqrestore(&acm->write_lock, flags); 817 return count; 818 } 819 820 stat = acm_start_wb(acm, wb); 821 spin_unlock_irqrestore(&acm->write_lock, flags); 822 823 if (stat < 0) 824 return stat; 825 return count; 826 } 827 828 static int acm_tty_write_room(struct tty_struct *tty) 829 { 830 struct acm *acm = tty->driver_data; 831 /* 832 * Do not let the line discipline to know that we have a reserve, 833 * or it might get too enthusiastic. 834 */ 835 return acm_wb_is_avail(acm) ? acm->writesize : 0; 836 } 837 838 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 839 { 840 struct acm *acm = tty->driver_data; 841 /* 842 * if the device was unplugged then any remaining characters fell out 843 * of the connector ;) 844 */ 845 if (acm->disconnected) 846 return 0; 847 /* 848 * This is inaccurate (overcounts), but it works. 849 */ 850 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 851 } 852 853 static void acm_tty_throttle(struct tty_struct *tty) 854 { 855 struct acm *acm = tty->driver_data; 856 857 set_bit(ACM_THROTTLED, &acm->flags); 858 } 859 860 static void acm_tty_unthrottle(struct tty_struct *tty) 861 { 862 struct acm *acm = tty->driver_data; 863 864 clear_bit(ACM_THROTTLED, &acm->flags); 865 866 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 867 smp_mb(); 868 869 acm_submit_read_urbs(acm, GFP_KERNEL); 870 } 871 872 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 873 { 874 struct acm *acm = tty->driver_data; 875 int retval; 876 877 retval = acm_send_break(acm, state ? 0xffff : 0); 878 if (retval < 0) 879 dev_dbg(&acm->control->dev, 880 "%s - send break failed\n", __func__); 881 return retval; 882 } 883 884 static int acm_tty_tiocmget(struct tty_struct *tty) 885 { 886 struct acm *acm = tty->driver_data; 887 888 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 889 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 890 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 891 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 892 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 893 TIOCM_CTS; 894 } 895 896 static int acm_tty_tiocmset(struct tty_struct *tty, 897 unsigned int set, unsigned int clear) 898 { 899 struct acm *acm = tty->driver_data; 900 unsigned int newctrl; 901 902 newctrl = acm->ctrlout; 903 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 904 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 905 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 906 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 907 908 newctrl = (newctrl & ~clear) | set; 909 910 if (acm->ctrlout == newctrl) 911 return 0; 912 return acm_set_control(acm, acm->ctrlout = newctrl); 913 } 914 915 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 916 { 917 struct acm *acm = tty->driver_data; 918 919 ss->xmit_fifo_size = acm->writesize; 920 ss->baud_base = le32_to_cpu(acm->line.dwDTERate); 921 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 922 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 923 ASYNC_CLOSING_WAIT_NONE : 924 jiffies_to_msecs(acm->port.closing_wait) / 10; 925 return 0; 926 } 927 928 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 929 { 930 struct acm *acm = tty->driver_data; 931 unsigned int closing_wait, close_delay; 932 unsigned int old_closing_wait, old_close_delay; 933 int retval = 0; 934 935 close_delay = msecs_to_jiffies(ss->close_delay * 10); 936 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 937 ASYNC_CLOSING_WAIT_NONE : 938 msecs_to_jiffies(ss->closing_wait * 10); 939 940 /* we must redo the rounding here, so that the values match */ 941 old_close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 942 old_closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 943 ASYNC_CLOSING_WAIT_NONE : 944 jiffies_to_msecs(acm->port.closing_wait) / 10; 945 946 mutex_lock(&acm->port.mutex); 947 948 if (!capable(CAP_SYS_ADMIN)) { 949 if ((ss->close_delay != old_close_delay) || 950 (ss->closing_wait != old_closing_wait)) 951 retval = -EPERM; 952 else 953 retval = -EOPNOTSUPP; 954 } else { 955 acm->port.close_delay = close_delay; 956 acm->port.closing_wait = closing_wait; 957 } 958 959 mutex_unlock(&acm->port.mutex); 960 return retval; 961 } 962 963 static int wait_serial_change(struct acm *acm, unsigned long arg) 964 { 965 int rv = 0; 966 DECLARE_WAITQUEUE(wait, current); 967 struct async_icount old, new; 968 969 do { 970 spin_lock_irq(&acm->read_lock); 971 old = acm->oldcount; 972 new = acm->iocount; 973 acm->oldcount = new; 974 spin_unlock_irq(&acm->read_lock); 975 976 if ((arg & TIOCM_DSR) && 977 old.dsr != new.dsr) 978 break; 979 if ((arg & TIOCM_CD) && 980 old.dcd != new.dcd) 981 break; 982 if ((arg & TIOCM_RI) && 983 old.rng != new.rng) 984 break; 985 986 add_wait_queue(&acm->wioctl, &wait); 987 set_current_state(TASK_INTERRUPTIBLE); 988 schedule(); 989 remove_wait_queue(&acm->wioctl, &wait); 990 if (acm->disconnected) { 991 if (arg & TIOCM_CD) 992 break; 993 else 994 rv = -ENODEV; 995 } else { 996 if (signal_pending(current)) 997 rv = -ERESTARTSYS; 998 } 999 } while (!rv); 1000 1001 1002 1003 return rv; 1004 } 1005 1006 static int acm_tty_get_icount(struct tty_struct *tty, 1007 struct serial_icounter_struct *icount) 1008 { 1009 struct acm *acm = tty->driver_data; 1010 1011 icount->dsr = acm->iocount.dsr; 1012 icount->rng = acm->iocount.rng; 1013 icount->dcd = acm->iocount.dcd; 1014 icount->frame = acm->iocount.frame; 1015 icount->overrun = acm->iocount.overrun; 1016 icount->parity = acm->iocount.parity; 1017 icount->brk = acm->iocount.brk; 1018 1019 return 0; 1020 } 1021 1022 static int acm_tty_ioctl(struct tty_struct *tty, 1023 unsigned int cmd, unsigned long arg) 1024 { 1025 struct acm *acm = tty->driver_data; 1026 int rv = -ENOIOCTLCMD; 1027 1028 switch (cmd) { 1029 case TIOCMIWAIT: 1030 rv = usb_autopm_get_interface(acm->control); 1031 if (rv < 0) { 1032 rv = -EIO; 1033 break; 1034 } 1035 rv = wait_serial_change(acm, arg); 1036 usb_autopm_put_interface(acm->control); 1037 break; 1038 } 1039 1040 return rv; 1041 } 1042 1043 static void acm_tty_set_termios(struct tty_struct *tty, 1044 struct ktermios *termios_old) 1045 { 1046 struct acm *acm = tty->driver_data; 1047 struct ktermios *termios = &tty->termios; 1048 struct usb_cdc_line_coding newline; 1049 int newctrl = acm->ctrlout; 1050 1051 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1052 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1053 newline.bParityType = termios->c_cflag & PARENB ? 1054 (termios->c_cflag & PARODD ? 1 : 2) + 1055 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1056 switch (termios->c_cflag & CSIZE) { 1057 case CS5: 1058 newline.bDataBits = 5; 1059 break; 1060 case CS6: 1061 newline.bDataBits = 6; 1062 break; 1063 case CS7: 1064 newline.bDataBits = 7; 1065 break; 1066 case CS8: 1067 default: 1068 newline.bDataBits = 8; 1069 break; 1070 } 1071 /* FIXME: Needs to clear unsupported bits in the termios */ 1072 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1073 1074 if (C_BAUD(tty) == B0) { 1075 newline.dwDTERate = acm->line.dwDTERate; 1076 newctrl &= ~ACM_CTRL_DTR; 1077 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1078 newctrl |= ACM_CTRL_DTR; 1079 } 1080 1081 if (newctrl != acm->ctrlout) 1082 acm_set_control(acm, acm->ctrlout = newctrl); 1083 1084 if (memcmp(&acm->line, &newline, sizeof newline)) { 1085 memcpy(&acm->line, &newline, sizeof newline); 1086 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1087 __func__, 1088 le32_to_cpu(newline.dwDTERate), 1089 newline.bCharFormat, newline.bParityType, 1090 newline.bDataBits); 1091 acm_set_line(acm, &acm->line); 1092 } 1093 } 1094 1095 static const struct tty_port_operations acm_port_ops = { 1096 .dtr_rts = acm_port_dtr_rts, 1097 .shutdown = acm_port_shutdown, 1098 .activate = acm_port_activate, 1099 .destruct = acm_port_destruct, 1100 }; 1101 1102 /* 1103 * USB probe and disconnect routines. 1104 */ 1105 1106 /* Little helpers: write/read buffers free */ 1107 static void acm_write_buffers_free(struct acm *acm) 1108 { 1109 int i; 1110 struct acm_wb *wb; 1111 1112 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1113 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1114 } 1115 1116 static void acm_read_buffers_free(struct acm *acm) 1117 { 1118 int i; 1119 1120 for (i = 0; i < acm->rx_buflimit; i++) 1121 usb_free_coherent(acm->dev, acm->readsize, 1122 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1123 } 1124 1125 /* Little helper: write buffers allocate */ 1126 static int acm_write_buffers_alloc(struct acm *acm) 1127 { 1128 int i; 1129 struct acm_wb *wb; 1130 1131 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1132 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1133 &wb->dmah); 1134 if (!wb->buf) { 1135 while (i != 0) { 1136 --i; 1137 --wb; 1138 usb_free_coherent(acm->dev, acm->writesize, 1139 wb->buf, wb->dmah); 1140 } 1141 return -ENOMEM; 1142 } 1143 } 1144 return 0; 1145 } 1146 1147 static int acm_probe(struct usb_interface *intf, 1148 const struct usb_device_id *id) 1149 { 1150 struct usb_cdc_union_desc *union_header = NULL; 1151 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1152 unsigned char *buffer = intf->altsetting->extra; 1153 int buflen = intf->altsetting->extralen; 1154 struct usb_interface *control_interface; 1155 struct usb_interface *data_interface; 1156 struct usb_endpoint_descriptor *epctrl = NULL; 1157 struct usb_endpoint_descriptor *epread = NULL; 1158 struct usb_endpoint_descriptor *epwrite = NULL; 1159 struct usb_device *usb_dev = interface_to_usbdev(intf); 1160 struct usb_cdc_parsed_header h; 1161 struct acm *acm; 1162 int minor; 1163 int ctrlsize, readsize; 1164 u8 *buf; 1165 int call_intf_num = -1; 1166 int data_intf_num = -1; 1167 unsigned long quirks; 1168 int num_rx_buf; 1169 int i; 1170 int combined_interfaces = 0; 1171 struct device *tty_dev; 1172 int rv = -ENOMEM; 1173 int res; 1174 1175 /* normal quirks */ 1176 quirks = (unsigned long)id->driver_info; 1177 1178 if (quirks == IGNORE_DEVICE) 1179 return -ENODEV; 1180 1181 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1182 1183 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1184 1185 /* handle quirks deadly to normal probing*/ 1186 if (quirks == NO_UNION_NORMAL) { 1187 data_interface = usb_ifnum_to_if(usb_dev, 1); 1188 control_interface = usb_ifnum_to_if(usb_dev, 0); 1189 /* we would crash */ 1190 if (!data_interface || !control_interface) 1191 return -ENODEV; 1192 goto skip_normal_probe; 1193 } 1194 1195 /* normal probing*/ 1196 if (!buffer) { 1197 dev_err(&intf->dev, "Weird descriptor references\n"); 1198 return -EINVAL; 1199 } 1200 1201 if (!buflen) { 1202 if (intf->cur_altsetting->endpoint && 1203 intf->cur_altsetting->endpoint->extralen && 1204 intf->cur_altsetting->endpoint->extra) { 1205 dev_dbg(&intf->dev, 1206 "Seeking extra descriptors on endpoint\n"); 1207 buflen = intf->cur_altsetting->endpoint->extralen; 1208 buffer = intf->cur_altsetting->endpoint->extra; 1209 } else { 1210 dev_err(&intf->dev, 1211 "Zero length descriptor references\n"); 1212 return -EINVAL; 1213 } 1214 } 1215 1216 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1217 union_header = h.usb_cdc_union_desc; 1218 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1219 if (cmgmd) 1220 call_intf_num = cmgmd->bDataInterface; 1221 1222 if (!union_header) { 1223 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1224 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1225 combined_interfaces = 1; 1226 control_interface = data_interface = intf; 1227 goto look_for_collapsed_interface; 1228 } else if (call_intf_num > 0) { 1229 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1230 data_intf_num = call_intf_num; 1231 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1232 control_interface = intf; 1233 } else { 1234 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1235 return -ENODEV; 1236 } 1237 } else { 1238 int class = -1; 1239 1240 data_intf_num = union_header->bSlaveInterface0; 1241 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1242 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1243 1244 if (control_interface) 1245 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1246 1247 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1248 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1249 combined_interfaces = 1; 1250 control_interface = data_interface = intf; 1251 goto look_for_collapsed_interface; 1252 } 1253 } 1254 1255 if (!control_interface || !data_interface) { 1256 dev_dbg(&intf->dev, "no interfaces\n"); 1257 return -ENODEV; 1258 } 1259 1260 if (data_intf_num != call_intf_num) 1261 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1262 1263 if (control_interface == data_interface) { 1264 /* some broken devices designed for windows work this way */ 1265 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1266 combined_interfaces = 1; 1267 /* a popular other OS doesn't use it */ 1268 quirks |= NO_CAP_LINE; 1269 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1270 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1271 return -EINVAL; 1272 } 1273 look_for_collapsed_interface: 1274 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1275 &epread, &epwrite, &epctrl, NULL); 1276 if (res) 1277 return res; 1278 1279 goto made_compressed_probe; 1280 } 1281 1282 skip_normal_probe: 1283 1284 /*workaround for switched interfaces */ 1285 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1286 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1287 dev_dbg(&intf->dev, 1288 "Your device has switched interfaces.\n"); 1289 swap(control_interface, data_interface); 1290 } else { 1291 return -EINVAL; 1292 } 1293 } 1294 1295 /* Accept probe requests only for the control interface */ 1296 if (!combined_interfaces && intf != control_interface) 1297 return -ENODEV; 1298 1299 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1300 /* valid in this context */ 1301 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1302 return -EBUSY; 1303 } 1304 1305 1306 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1307 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1308 return -EINVAL; 1309 1310 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1311 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1312 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1313 1314 1315 /* workaround for switched endpoints */ 1316 if (!usb_endpoint_dir_in(epread)) { 1317 /* descriptors are swapped */ 1318 dev_dbg(&intf->dev, 1319 "The data interface has switched endpoints\n"); 1320 swap(epread, epwrite); 1321 } 1322 made_compressed_probe: 1323 dev_dbg(&intf->dev, "interfaces are valid\n"); 1324 1325 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1326 if (acm == NULL) 1327 goto alloc_fail; 1328 1329 tty_port_init(&acm->port); 1330 acm->port.ops = &acm_port_ops; 1331 1332 ctrlsize = usb_endpoint_maxp(epctrl); 1333 readsize = usb_endpoint_maxp(epread) * 1334 (quirks == SINGLE_RX_URB ? 1 : 2); 1335 acm->combined_interfaces = combined_interfaces; 1336 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1337 acm->control = control_interface; 1338 acm->data = data_interface; 1339 1340 usb_get_intf(acm->control); /* undone in destruct() */ 1341 1342 minor = acm_alloc_minor(acm); 1343 if (minor < 0) 1344 goto alloc_fail1; 1345 1346 acm->minor = minor; 1347 acm->dev = usb_dev; 1348 if (h.usb_cdc_acm_descriptor) 1349 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1350 if (quirks & NO_CAP_LINE) 1351 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1352 acm->ctrlsize = ctrlsize; 1353 acm->readsize = readsize; 1354 acm->rx_buflimit = num_rx_buf; 1355 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1356 init_waitqueue_head(&acm->wioctl); 1357 spin_lock_init(&acm->write_lock); 1358 spin_lock_init(&acm->read_lock); 1359 mutex_init(&acm->mutex); 1360 if (usb_endpoint_xfer_int(epread)) { 1361 acm->bInterval = epread->bInterval; 1362 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1363 } else { 1364 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1365 } 1366 if (usb_endpoint_xfer_int(epwrite)) 1367 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1368 else 1369 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1370 init_usb_anchor(&acm->delayed); 1371 acm->quirks = quirks; 1372 1373 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1374 if (!buf) 1375 goto alloc_fail1; 1376 acm->ctrl_buffer = buf; 1377 1378 if (acm_write_buffers_alloc(acm) < 0) 1379 goto alloc_fail2; 1380 1381 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1382 if (!acm->ctrlurb) 1383 goto alloc_fail3; 1384 1385 for (i = 0; i < num_rx_buf; i++) { 1386 struct acm_rb *rb = &(acm->read_buffers[i]); 1387 struct urb *urb; 1388 1389 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1390 &rb->dma); 1391 if (!rb->base) 1392 goto alloc_fail4; 1393 rb->index = i; 1394 rb->instance = acm; 1395 1396 urb = usb_alloc_urb(0, GFP_KERNEL); 1397 if (!urb) 1398 goto alloc_fail4; 1399 1400 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1401 urb->transfer_dma = rb->dma; 1402 if (usb_endpoint_xfer_int(epread)) 1403 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1404 acm->readsize, 1405 acm_read_bulk_callback, rb, 1406 acm->bInterval); 1407 else 1408 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1409 acm->readsize, 1410 acm_read_bulk_callback, rb); 1411 1412 acm->read_urbs[i] = urb; 1413 __set_bit(i, &acm->read_urbs_free); 1414 } 1415 for (i = 0; i < ACM_NW; i++) { 1416 struct acm_wb *snd = &(acm->wb[i]); 1417 1418 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1419 if (snd->urb == NULL) 1420 goto alloc_fail5; 1421 1422 if (usb_endpoint_xfer_int(epwrite)) 1423 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1424 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1425 else 1426 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1427 NULL, acm->writesize, acm_write_bulk, snd); 1428 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1429 if (quirks & SEND_ZERO_PACKET) 1430 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1431 snd->instance = acm; 1432 } 1433 1434 usb_set_intfdata(intf, acm); 1435 1436 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1437 if (i < 0) 1438 goto alloc_fail5; 1439 1440 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1441 struct usb_cdc_country_functional_desc * cfd = 1442 h.usb_cdc_country_functional_desc; 1443 1444 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1445 if (!acm->country_codes) 1446 goto skip_countries; 1447 acm->country_code_size = cfd->bLength - 4; 1448 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1449 cfd->bLength - 4); 1450 acm->country_rel_date = cfd->iCountryCodeRelDate; 1451 1452 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1453 if (i < 0) { 1454 kfree(acm->country_codes); 1455 acm->country_codes = NULL; 1456 acm->country_code_size = 0; 1457 goto skip_countries; 1458 } 1459 1460 i = device_create_file(&intf->dev, 1461 &dev_attr_iCountryCodeRelDate); 1462 if (i < 0) { 1463 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1464 kfree(acm->country_codes); 1465 acm->country_codes = NULL; 1466 acm->country_code_size = 0; 1467 goto skip_countries; 1468 } 1469 } 1470 1471 skip_countries: 1472 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1473 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1474 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1475 /* works around buggy devices */ 1476 epctrl->bInterval ? epctrl->bInterval : 16); 1477 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1478 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1479 acm->notification_buffer = NULL; 1480 acm->nb_index = 0; 1481 acm->nb_size = 0; 1482 1483 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1484 1485 acm->line.dwDTERate = cpu_to_le32(9600); 1486 acm->line.bDataBits = 8; 1487 acm_set_line(acm, &acm->line); 1488 1489 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1490 usb_set_intfdata(data_interface, acm); 1491 1492 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1493 &control_interface->dev); 1494 if (IS_ERR(tty_dev)) { 1495 rv = PTR_ERR(tty_dev); 1496 goto alloc_fail6; 1497 } 1498 1499 if (quirks & CLEAR_HALT_CONDITIONS) { 1500 usb_clear_halt(usb_dev, acm->in); 1501 usb_clear_halt(usb_dev, acm->out); 1502 } 1503 1504 return 0; 1505 alloc_fail6: 1506 if (acm->country_codes) { 1507 device_remove_file(&acm->control->dev, 1508 &dev_attr_wCountryCodes); 1509 device_remove_file(&acm->control->dev, 1510 &dev_attr_iCountryCodeRelDate); 1511 kfree(acm->country_codes); 1512 } 1513 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1514 alloc_fail5: 1515 usb_set_intfdata(intf, NULL); 1516 for (i = 0; i < ACM_NW; i++) 1517 usb_free_urb(acm->wb[i].urb); 1518 alloc_fail4: 1519 for (i = 0; i < num_rx_buf; i++) 1520 usb_free_urb(acm->read_urbs[i]); 1521 acm_read_buffers_free(acm); 1522 usb_free_urb(acm->ctrlurb); 1523 alloc_fail3: 1524 acm_write_buffers_free(acm); 1525 alloc_fail2: 1526 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1527 alloc_fail1: 1528 tty_port_put(&acm->port); 1529 alloc_fail: 1530 return rv; 1531 } 1532 1533 static void acm_disconnect(struct usb_interface *intf) 1534 { 1535 struct acm *acm = usb_get_intfdata(intf); 1536 struct tty_struct *tty; 1537 int i; 1538 1539 /* sibling interface is already cleaning up */ 1540 if (!acm) 1541 return; 1542 1543 mutex_lock(&acm->mutex); 1544 acm->disconnected = true; 1545 if (acm->country_codes) { 1546 device_remove_file(&acm->control->dev, 1547 &dev_attr_wCountryCodes); 1548 device_remove_file(&acm->control->dev, 1549 &dev_attr_iCountryCodeRelDate); 1550 } 1551 wake_up_all(&acm->wioctl); 1552 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1553 usb_set_intfdata(acm->control, NULL); 1554 usb_set_intfdata(acm->data, NULL); 1555 mutex_unlock(&acm->mutex); 1556 1557 tty = tty_port_tty_get(&acm->port); 1558 if (tty) { 1559 tty_vhangup(tty); 1560 tty_kref_put(tty); 1561 } 1562 1563 acm_kill_urbs(acm); 1564 cancel_delayed_work_sync(&acm->dwork); 1565 1566 tty_unregister_device(acm_tty_driver, acm->minor); 1567 1568 usb_free_urb(acm->ctrlurb); 1569 for (i = 0; i < ACM_NW; i++) 1570 usb_free_urb(acm->wb[i].urb); 1571 for (i = 0; i < acm->rx_buflimit; i++) 1572 usb_free_urb(acm->read_urbs[i]); 1573 acm_write_buffers_free(acm); 1574 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1575 acm_read_buffers_free(acm); 1576 1577 kfree(acm->notification_buffer); 1578 1579 if (!acm->combined_interfaces) 1580 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1581 acm->data : acm->control); 1582 1583 tty_port_put(&acm->port); 1584 } 1585 1586 #ifdef CONFIG_PM 1587 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1588 { 1589 struct acm *acm = usb_get_intfdata(intf); 1590 int cnt; 1591 1592 spin_lock_irq(&acm->write_lock); 1593 if (PMSG_IS_AUTO(message)) { 1594 if (acm->transmitting) { 1595 spin_unlock_irq(&acm->write_lock); 1596 return -EBUSY; 1597 } 1598 } 1599 cnt = acm->susp_count++; 1600 spin_unlock_irq(&acm->write_lock); 1601 1602 if (cnt) 1603 return 0; 1604 1605 acm_kill_urbs(acm); 1606 cancel_delayed_work_sync(&acm->dwork); 1607 acm->urbs_in_error_delay = 0; 1608 1609 return 0; 1610 } 1611 1612 static int acm_resume(struct usb_interface *intf) 1613 { 1614 struct acm *acm = usb_get_intfdata(intf); 1615 struct urb *urb; 1616 int rv = 0; 1617 1618 spin_lock_irq(&acm->write_lock); 1619 1620 if (--acm->susp_count) 1621 goto out; 1622 1623 if (tty_port_initialized(&acm->port)) { 1624 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1625 1626 for (;;) { 1627 urb = usb_get_from_anchor(&acm->delayed); 1628 if (!urb) 1629 break; 1630 1631 acm_start_wb(acm, urb->context); 1632 } 1633 1634 /* 1635 * delayed error checking because we must 1636 * do the write path at all cost 1637 */ 1638 if (rv < 0) 1639 goto out; 1640 1641 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1642 } 1643 out: 1644 spin_unlock_irq(&acm->write_lock); 1645 1646 return rv; 1647 } 1648 1649 static int acm_reset_resume(struct usb_interface *intf) 1650 { 1651 struct acm *acm = usb_get_intfdata(intf); 1652 1653 if (tty_port_initialized(&acm->port)) 1654 tty_port_tty_hangup(&acm->port, false); 1655 1656 return acm_resume(intf); 1657 } 1658 1659 #endif /* CONFIG_PM */ 1660 1661 static int acm_pre_reset(struct usb_interface *intf) 1662 { 1663 struct acm *acm = usb_get_intfdata(intf); 1664 1665 clear_bit(EVENT_RX_STALL, &acm->flags); 1666 acm->nb_index = 0; /* pending control transfers are lost */ 1667 1668 return 0; 1669 } 1670 1671 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1672 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1673 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1674 USB_CDC_ACM_PROTO_VENDOR) 1675 1676 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1677 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1678 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1679 USB_CDC_ACM_PROTO_VENDOR) 1680 1681 /* 1682 * USB driver structure. 1683 */ 1684 1685 static const struct usb_device_id acm_ids[] = { 1686 /* quirky and broken devices */ 1687 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1688 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1689 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1690 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1691 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1692 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1693 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1694 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1695 }, 1696 { USB_DEVICE(0x045b, 0x023c), /* Renesas USB Download mode */ 1697 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1698 }, 1699 { USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */ 1700 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1701 }, 1702 { USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */ 1703 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1704 }, 1705 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1706 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1707 }, 1708 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1709 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1710 }, 1711 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1712 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1713 }, 1714 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1715 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1716 }, 1717 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1718 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1719 }, 1720 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1721 .driver_info = SINGLE_RX_URB, 1722 }, 1723 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1724 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1725 }, 1726 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1727 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1728 }, 1729 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1730 .driver_info = SINGLE_RX_URB, 1731 }, 1732 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1733 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1734 }, 1735 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1736 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1737 }, 1738 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1739 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1740 }, 1741 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1742 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1743 }, 1744 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1745 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1746 }, 1747 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1748 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1749 }, 1750 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1751 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1752 }, 1753 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1754 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1755 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1756 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1757 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1758 }, 1759 /* Motorola H24 HSPA module: */ 1760 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1761 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1762 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1763 }, 1764 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1765 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1766 }, 1767 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1768 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1769 }, 1770 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1771 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1772 }, 1773 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1774 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1775 }, 1776 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1777 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1778 }, 1779 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1780 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1781 }, 1782 1783 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1784 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1785 data interface instead of 1786 communications interface. 1787 Maybe we should define a new 1788 quirk for this. */ 1789 }, 1790 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1791 .driver_info = NO_UNION_NORMAL, 1792 }, 1793 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1794 .driver_info = NO_UNION_NORMAL, 1795 }, 1796 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1797 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1798 }, 1799 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1800 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1801 }, 1802 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1803 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1804 }, 1805 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1806 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1807 }, 1808 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1809 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1810 }, 1811 1812 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1813 .driver_info = CLEAR_HALT_CONDITIONS, 1814 }, 1815 1816 /* Nokia S60 phones expose two ACM channels. The first is 1817 * a modem and is picked up by the standard AT-command 1818 * information below. The second is 'vendor-specific' but 1819 * is treated as a serial device at the S60 end, so we want 1820 * to expose it on Linux too. */ 1821 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1822 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1823 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1824 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1825 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1826 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1827 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1828 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1829 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1830 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1878 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1879 1880 /* Support for Owen devices */ 1881 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1882 1883 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1884 1885 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1886 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1887 .driver_info = IGNORE_DEVICE, 1888 }, 1889 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1890 .driver_info = IGNORE_DEVICE, 1891 }, 1892 #endif 1893 1894 #if IS_ENABLED(CONFIG_IR_TOY) 1895 { USB_DEVICE(0x04d8, 0xfd08), 1896 .driver_info = IGNORE_DEVICE, 1897 }, 1898 1899 { USB_DEVICE(0x04d8, 0xf58b), 1900 .driver_info = IGNORE_DEVICE, 1901 }, 1902 #endif 1903 1904 #if IS_ENABLED(CONFIG_USB_SERIAL_XR) 1905 { USB_DEVICE(0x04e2, 0x1410), /* Ignore XR21V141X USB to Serial converter */ 1906 .driver_info = IGNORE_DEVICE, 1907 }, 1908 #endif 1909 1910 /*Samsung phone in firmware update mode */ 1911 { USB_DEVICE(0x04e8, 0x685d), 1912 .driver_info = IGNORE_DEVICE, 1913 }, 1914 1915 /* Exclude Infineon Flash Loader utility */ 1916 { USB_DEVICE(0x058b, 0x0041), 1917 .driver_info = IGNORE_DEVICE, 1918 }, 1919 1920 /* Exclude ETAS ES58x */ 1921 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 1922 .driver_info = IGNORE_DEVICE, 1923 }, 1924 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 1925 .driver_info = IGNORE_DEVICE, 1926 }, 1927 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 1928 .driver_info = IGNORE_DEVICE, 1929 }, 1930 1931 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1932 .driver_info = SEND_ZERO_PACKET, 1933 }, 1934 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1935 .driver_info = SEND_ZERO_PACKET, 1936 }, 1937 1938 /* Exclude Goodix Fingerprint Reader */ 1939 { USB_DEVICE(0x27c6, 0x5395), 1940 .driver_info = IGNORE_DEVICE, 1941 }, 1942 1943 /* control interfaces without any protocol set */ 1944 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1945 USB_CDC_PROTO_NONE) }, 1946 1947 /* control interfaces with various AT-command sets */ 1948 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1949 USB_CDC_ACM_PROTO_AT_V25TER) }, 1950 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1951 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1952 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1953 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1954 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1955 USB_CDC_ACM_PROTO_AT_GSM) }, 1956 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1957 USB_CDC_ACM_PROTO_AT_3G) }, 1958 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1959 USB_CDC_ACM_PROTO_AT_CDMA) }, 1960 1961 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1962 .driver_info = SEND_ZERO_PACKET, 1963 }, 1964 1965 { } 1966 }; 1967 1968 MODULE_DEVICE_TABLE(usb, acm_ids); 1969 1970 static struct usb_driver acm_driver = { 1971 .name = "cdc_acm", 1972 .probe = acm_probe, 1973 .disconnect = acm_disconnect, 1974 #ifdef CONFIG_PM 1975 .suspend = acm_suspend, 1976 .resume = acm_resume, 1977 .reset_resume = acm_reset_resume, 1978 #endif 1979 .pre_reset = acm_pre_reset, 1980 .id_table = acm_ids, 1981 #ifdef CONFIG_PM 1982 .supports_autosuspend = 1, 1983 #endif 1984 .disable_hub_initiated_lpm = 1, 1985 }; 1986 1987 /* 1988 * TTY driver structures. 1989 */ 1990 1991 static const struct tty_operations acm_ops = { 1992 .install = acm_tty_install, 1993 .open = acm_tty_open, 1994 .close = acm_tty_close, 1995 .cleanup = acm_tty_cleanup, 1996 .hangup = acm_tty_hangup, 1997 .write = acm_tty_write, 1998 .write_room = acm_tty_write_room, 1999 .ioctl = acm_tty_ioctl, 2000 .throttle = acm_tty_throttle, 2001 .unthrottle = acm_tty_unthrottle, 2002 .chars_in_buffer = acm_tty_chars_in_buffer, 2003 .break_ctl = acm_tty_break_ctl, 2004 .set_termios = acm_tty_set_termios, 2005 .tiocmget = acm_tty_tiocmget, 2006 .tiocmset = acm_tty_tiocmset, 2007 .get_serial = get_serial_info, 2008 .set_serial = set_serial_info, 2009 .get_icount = acm_tty_get_icount, 2010 }; 2011 2012 /* 2013 * Init / exit. 2014 */ 2015 2016 static int __init acm_init(void) 2017 { 2018 int retval; 2019 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 2020 if (!acm_tty_driver) 2021 return -ENOMEM; 2022 acm_tty_driver->driver_name = "acm", 2023 acm_tty_driver->name = "ttyACM", 2024 acm_tty_driver->major = ACM_TTY_MAJOR, 2025 acm_tty_driver->minor_start = 0, 2026 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2027 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2028 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2029 acm_tty_driver->init_termios = tty_std_termios; 2030 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2031 HUPCL | CLOCAL; 2032 tty_set_operations(acm_tty_driver, &acm_ops); 2033 2034 retval = tty_register_driver(acm_tty_driver); 2035 if (retval) { 2036 put_tty_driver(acm_tty_driver); 2037 return retval; 2038 } 2039 2040 retval = usb_register(&acm_driver); 2041 if (retval) { 2042 tty_unregister_driver(acm_tty_driver); 2043 put_tty_driver(acm_tty_driver); 2044 return retval; 2045 } 2046 2047 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2048 2049 return 0; 2050 } 2051 2052 static void __exit acm_exit(void) 2053 { 2054 usb_deregister(&acm_driver); 2055 tty_unregister_driver(acm_tty_driver); 2056 put_tty_driver(acm_tty_driver); 2057 idr_destroy(&acm_minors); 2058 } 2059 2060 module_init(acm_init); 2061 module_exit(acm_exit); 2062 2063 MODULE_AUTHOR(DRIVER_AUTHOR); 2064 MODULE_DESCRIPTION(DRIVER_DESC); 2065 MODULE_LICENSE("GPL"); 2066 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2067