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 47static struct usb_driver acm_driver; 48static struct tty_driver *acm_tty_driver; 49 50static DEFINE_IDR(acm_minors); 51static DEFINE_MUTEX(acm_minors_lock); 52 53static 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 */ 64static 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 */ 87static 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'. */ 99static 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 110static 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 */ 136static 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 150static void acm_poison_urbs(struct acm *acm) 151{ 152 int i; 153 154 usb_poison_urb(acm->ctrlurb); 155 for (i = 0; i < ACM_NW; i++) 156 usb_poison_urb(acm->wb[i].urb); 157 for (i = 0; i < acm->rx_buflimit; i++) 158 usb_poison_urb(acm->read_urbs[i]); 159} 160 161static void acm_unpoison_urbs(struct acm *acm) 162{ 163 int i; 164 165 for (i = 0; i < acm->rx_buflimit; i++) 166 usb_unpoison_urb(acm->read_urbs[i]); 167 for (i = 0; i < ACM_NW; i++) 168 usb_unpoison_urb(acm->wb[i].urb); 169 usb_unpoison_urb(acm->ctrlurb); 170} 171 172 173/* 174 * Write buffer management. 175 * All of these assume proper locks taken by the caller. 176 */ 177 178static int acm_wb_alloc(struct acm *acm) 179{ 180 int i, wbn; 181 struct acm_wb *wb; 182 183 wbn = 0; 184 i = 0; 185 for (;;) { 186 wb = &acm->wb[wbn]; 187 if (!wb->use) { 188 wb->use = true; 189 wb->len = 0; 190 return wbn; 191 } 192 wbn = (wbn + 1) % ACM_NW; 193 if (++i >= ACM_NW) 194 return -1; 195 } 196} 197 198static int acm_wb_is_avail(struct acm *acm) 199{ 200 int i, n; 201 unsigned long flags; 202 203 n = ACM_NW; 204 spin_lock_irqsave(&acm->write_lock, flags); 205 for (i = 0; i < ACM_NW; i++) 206 if(acm->wb[i].use) 207 n--; 208 spin_unlock_irqrestore(&acm->write_lock, flags); 209 return n; 210} 211 212/* 213 * Finish write. Caller must hold acm->write_lock 214 */ 215static void acm_write_done(struct acm *acm, struct acm_wb *wb) 216{ 217 wb->use = false; 218 acm->transmitting--; 219 usb_autopm_put_interface_async(acm->control); 220} 221 222/* 223 * Poke write. 224 * 225 * the caller is responsible for locking 226 */ 227 228static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 229{ 230 int rc; 231 232 acm->transmitting++; 233 234 wb->urb->transfer_buffer = wb->buf; 235 wb->urb->transfer_dma = wb->dmah; 236 wb->urb->transfer_buffer_length = wb->len; 237 wb->urb->dev = acm->dev; 238 239 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 240 if (rc < 0) { 241 if (rc != -EPERM) 242 dev_err(&acm->data->dev, 243 "%s - usb_submit_urb(write bulk) failed: %d\n", 244 __func__, rc); 245 acm_write_done(acm, wb); 246 } 247 return rc; 248} 249 250/* 251 * attributes exported through sysfs 252 */ 253static ssize_t bmCapabilities_show 254(struct device *dev, struct device_attribute *attr, char *buf) 255{ 256 struct usb_interface *intf = to_usb_interface(dev); 257 struct acm *acm = usb_get_intfdata(intf); 258 259 return sprintf(buf, "%d", acm->ctrl_caps); 260} 261static DEVICE_ATTR_RO(bmCapabilities); 262 263static ssize_t wCountryCodes_show 264(struct device *dev, struct device_attribute *attr, char *buf) 265{ 266 struct usb_interface *intf = to_usb_interface(dev); 267 struct acm *acm = usb_get_intfdata(intf); 268 269 memcpy(buf, acm->country_codes, acm->country_code_size); 270 return acm->country_code_size; 271} 272 273static DEVICE_ATTR_RO(wCountryCodes); 274 275static ssize_t iCountryCodeRelDate_show 276(struct device *dev, struct device_attribute *attr, char *buf) 277{ 278 struct usb_interface *intf = to_usb_interface(dev); 279 struct acm *acm = usb_get_intfdata(intf); 280 281 return sprintf(buf, "%d", acm->country_rel_date); 282} 283 284static DEVICE_ATTR_RO(iCountryCodeRelDate); 285/* 286 * Interrupt handlers for various ACM device responses 287 */ 288 289static void acm_process_notification(struct acm *acm, unsigned char *buf) 290{ 291 int newctrl; 292 int difference; 293 unsigned long flags; 294 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 295 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 296 297 switch (dr->bNotificationType) { 298 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 299 dev_dbg(&acm->control->dev, 300 "%s - network connection: %d\n", __func__, dr->wValue); 301 break; 302 303 case USB_CDC_NOTIFY_SERIAL_STATE: 304 if (le16_to_cpu(dr->wLength) != 2) { 305 dev_dbg(&acm->control->dev, 306 "%s - malformed serial state\n", __func__); 307 break; 308 } 309 310 newctrl = get_unaligned_le16(data); 311 dev_dbg(&acm->control->dev, 312 "%s - serial state: 0x%x\n", __func__, newctrl); 313 314 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 315 dev_dbg(&acm->control->dev, 316 "%s - calling hangup\n", __func__); 317 tty_port_tty_hangup(&acm->port, false); 318 } 319 320 difference = acm->ctrlin ^ newctrl; 321 spin_lock_irqsave(&acm->read_lock, flags); 322 acm->ctrlin = newctrl; 323 acm->oldcount = acm->iocount; 324 325 if (difference & ACM_CTRL_DSR) 326 acm->iocount.dsr++; 327 if (difference & ACM_CTRL_DCD) 328 acm->iocount.dcd++; 329 if (newctrl & ACM_CTRL_BRK) { 330 acm->iocount.brk++; 331 tty_insert_flip_char(&acm->port, 0, TTY_BREAK); 332 } 333 if (newctrl & ACM_CTRL_RI) 334 acm->iocount.rng++; 335 if (newctrl & ACM_CTRL_FRAMING) 336 acm->iocount.frame++; 337 if (newctrl & ACM_CTRL_PARITY) 338 acm->iocount.parity++; 339 if (newctrl & ACM_CTRL_OVERRUN) 340 acm->iocount.overrun++; 341 spin_unlock_irqrestore(&acm->read_lock, flags); 342 343 if (newctrl & ACM_CTRL_BRK) 344 tty_flip_buffer_push(&acm->port); 345 346 if (difference) 347 wake_up_all(&acm->wioctl); 348 349 break; 350 351 default: 352 dev_dbg(&acm->control->dev, 353 "%s - unknown notification %d received: index %d len %d\n", 354 __func__, 355 dr->bNotificationType, dr->wIndex, dr->wLength); 356 } 357} 358 359/* control interface reports status changes with "interrupt" transfers */ 360static void acm_ctrl_irq(struct urb *urb) 361{ 362 struct acm *acm = urb->context; 363 struct usb_cdc_notification *dr = urb->transfer_buffer; 364 unsigned int current_size = urb->actual_length; 365 unsigned int expected_size, copy_size, alloc_size; 366 int retval; 367 int status = urb->status; 368 369 switch (status) { 370 case 0: 371 /* success */ 372 break; 373 case -ECONNRESET: 374 case -ENOENT: 375 case -ESHUTDOWN: 376 /* this urb is terminated, clean up */ 377 dev_dbg(&acm->control->dev, 378 "%s - urb shutting down with status: %d\n", 379 __func__, status); 380 return; 381 default: 382 dev_dbg(&acm->control->dev, 383 "%s - nonzero urb status received: %d\n", 384 __func__, status); 385 goto exit; 386 } 387 388 usb_mark_last_busy(acm->dev); 389 390 if (acm->nb_index) 391 dr = (struct usb_cdc_notification *)acm->notification_buffer; 392 393 /* size = notification-header + (optional) data */ 394 expected_size = sizeof(struct usb_cdc_notification) + 395 le16_to_cpu(dr->wLength); 396 397 if (current_size < expected_size) { 398 /* notification is transmitted fragmented, reassemble */ 399 if (acm->nb_size < expected_size) { 400 u8 *new_buffer; 401 alloc_size = roundup_pow_of_two(expected_size); 402 /* Final freeing is done on disconnect. */ 403 new_buffer = krealloc(acm->notification_buffer, 404 alloc_size, GFP_ATOMIC); 405 if (!new_buffer) { 406 acm->nb_index = 0; 407 goto exit; 408 } 409 410 acm->notification_buffer = new_buffer; 411 acm->nb_size = alloc_size; 412 dr = (struct usb_cdc_notification *)acm->notification_buffer; 413 } 414 415 copy_size = min(current_size, 416 expected_size - acm->nb_index); 417 418 memcpy(&acm->notification_buffer[acm->nb_index], 419 urb->transfer_buffer, copy_size); 420 acm->nb_index += copy_size; 421 current_size = acm->nb_index; 422 } 423 424 if (current_size >= expected_size) { 425 /* notification complete */ 426 acm_process_notification(acm, (unsigned char *)dr); 427 acm->nb_index = 0; 428 } 429 430exit: 431 retval = usb_submit_urb(urb, GFP_ATOMIC); 432 if (retval && retval != -EPERM && retval != -ENODEV) 433 dev_err(&acm->control->dev, 434 "%s - usb_submit_urb failed: %d\n", __func__, retval); 435 else 436 dev_vdbg(&acm->control->dev, 437 "control resubmission terminated %d\n", retval); 438} 439 440static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 441{ 442 int res; 443 444 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 445 return 0; 446 447 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 448 if (res) { 449 if (res != -EPERM && res != -ENODEV) { 450 dev_err(&acm->data->dev, 451 "urb %d failed submission with %d\n", 452 index, res); 453 } else { 454 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 455 } 456 set_bit(index, &acm->read_urbs_free); 457 return res; 458 } else { 459 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 460 } 461 462 return 0; 463} 464 465static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 466{ 467 int res; 468 int i; 469 470 for (i = 0; i < acm->rx_buflimit; ++i) { 471 res = acm_submit_read_urb(acm, i, mem_flags); 472 if (res) 473 return res; 474 } 475 476 return 0; 477} 478 479static void acm_process_read_urb(struct acm *acm, struct urb *urb) 480{ 481 unsigned long flags; 482 483 if (!urb->actual_length) 484 return; 485 486 spin_lock_irqsave(&acm->read_lock, flags); 487 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 488 urb->actual_length); 489 spin_unlock_irqrestore(&acm->read_lock, flags); 490 491 tty_flip_buffer_push(&acm->port); 492} 493 494static void acm_read_bulk_callback(struct urb *urb) 495{ 496 struct acm_rb *rb = urb->context; 497 struct acm *acm = rb->instance; 498 int status = urb->status; 499 bool stopped = false; 500 bool stalled = false; 501 bool cooldown = false; 502 503 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 504 rb->index, urb->actual_length, status); 505 506 switch (status) { 507 case 0: 508 usb_mark_last_busy(acm->dev); 509 acm_process_read_urb(acm, urb); 510 break; 511 case -EPIPE: 512 set_bit(EVENT_RX_STALL, &acm->flags); 513 stalled = true; 514 break; 515 case -ENOENT: 516 case -ECONNRESET: 517 case -ESHUTDOWN: 518 dev_dbg(&acm->data->dev, 519 "%s - urb shutting down with status: %d\n", 520 __func__, status); 521 stopped = true; 522 break; 523 case -EOVERFLOW: 524 case -EPROTO: 525 dev_dbg(&acm->data->dev, 526 "%s - cooling babbling device\n", __func__); 527 usb_mark_last_busy(acm->dev); 528 set_bit(rb->index, &acm->urbs_in_error_delay); 529 set_bit(ACM_ERROR_DELAY, &acm->flags); 530 cooldown = true; 531 break; 532 default: 533 dev_dbg(&acm->data->dev, 534 "%s - nonzero urb status received: %d\n", 535 __func__, status); 536 break; 537 } 538 539 /* 540 * Make sure URB processing is done before marking as free to avoid 541 * racing with unthrottle() on another CPU. Matches the barriers 542 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 543 */ 544 smp_mb__before_atomic(); 545 set_bit(rb->index, &acm->read_urbs_free); 546 /* 547 * Make sure URB is marked as free before checking the throttled flag 548 * to avoid racing with unthrottle() on another CPU. Matches the 549 * smp_mb() in unthrottle(). 550 */ 551 smp_mb__after_atomic(); 552 553 if (stopped || stalled || cooldown) { 554 if (stalled) 555 schedule_delayed_work(&acm->dwork, 0); 556 else if (cooldown) 557 schedule_delayed_work(&acm->dwork, HZ / 2); 558 return; 559 } 560 561 if (test_bit(ACM_THROTTLED, &acm->flags)) 562 return; 563 564 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 565} 566 567/* data interface wrote those outgoing bytes */ 568static void acm_write_bulk(struct urb *urb) 569{ 570 struct acm_wb *wb = urb->context; 571 struct acm *acm = wb->instance; 572 unsigned long flags; 573 int status = urb->status; 574 575 if (status || (urb->actual_length != urb->transfer_buffer_length)) 576 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 577 urb->actual_length, 578 urb->transfer_buffer_length, 579 status); 580 581 spin_lock_irqsave(&acm->write_lock, flags); 582 acm_write_done(acm, wb); 583 spin_unlock_irqrestore(&acm->write_lock, flags); 584 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 585 schedule_delayed_work(&acm->dwork, 0); 586} 587 588static void acm_softint(struct work_struct *work) 589{ 590 int i; 591 struct acm *acm = container_of(work, struct acm, dwork.work); 592 593 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 594 smp_mb(); /* against acm_suspend() */ 595 if (!acm->susp_count) { 596 for (i = 0; i < acm->rx_buflimit; i++) 597 usb_kill_urb(acm->read_urbs[i]); 598 usb_clear_halt(acm->dev, acm->in); 599 acm_submit_read_urbs(acm, GFP_KERNEL); 600 clear_bit(EVENT_RX_STALL, &acm->flags); 601 } 602 } 603 604 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 605 for (i = 0; i < acm->rx_buflimit; i++) 606 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 607 acm_submit_read_urb(acm, i, GFP_KERNEL); 608 } 609 610 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 611 tty_port_tty_wakeup(&acm->port); 612} 613 614/* 615 * TTY handlers 616 */ 617 618static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 619{ 620 struct acm *acm; 621 int retval; 622 623 acm = acm_get_by_minor(tty->index); 624 if (!acm) 625 return -ENODEV; 626 627 retval = tty_standard_install(driver, tty); 628 if (retval) 629 goto error_init_termios; 630 631 /* 632 * Suppress initial echoing for some devices which might send data 633 * immediately after acm driver has been installed. 634 */ 635 if (acm->quirks & DISABLE_ECHO) 636 tty->termios.c_lflag &= ~ECHO; 637 638 tty->driver_data = acm; 639 640 return 0; 641 642error_init_termios: 643 tty_port_put(&acm->port); 644 return retval; 645} 646 647static int acm_tty_open(struct tty_struct *tty, struct file *filp) 648{ 649 struct acm *acm = tty->driver_data; 650 651 return tty_port_open(&acm->port, tty, filp); 652} 653 654static void acm_port_dtr_rts(struct tty_port *port, int raise) 655{ 656 struct acm *acm = container_of(port, struct acm, port); 657 int val; 658 int res; 659 660 if (raise) 661 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 662 else 663 val = 0; 664 665 /* FIXME: add missing ctrlout locking throughout driver */ 666 acm->ctrlout = val; 667 668 res = acm_set_control(acm, val); 669 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 670 /* This is broken in too many devices to spam the logs */ 671 dev_dbg(&acm->control->dev, "failed to set dtr/rts\n"); 672} 673 674static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 675{ 676 struct acm *acm = container_of(port, struct acm, port); 677 int retval = -ENODEV; 678 int i; 679 680 mutex_lock(&acm->mutex); 681 if (acm->disconnected) 682 goto disconnected; 683 684 retval = usb_autopm_get_interface(acm->control); 685 if (retval) 686 goto error_get_interface; 687 688 /* 689 * FIXME: Why do we need this? Allocating 64K of physically contiguous 690 * memory is really nasty... 691 */ 692 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 693 acm->control->needs_remote_wakeup = 1; 694 695 acm->ctrlurb->dev = acm->dev; 696 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 697 if (retval) { 698 dev_err(&acm->control->dev, 699 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 700 goto error_submit_urb; 701 } 702 703 acm_tty_set_termios(tty, NULL); 704 705 /* 706 * Unthrottle device in case the TTY was closed while throttled. 707 */ 708 clear_bit(ACM_THROTTLED, &acm->flags); 709 710 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 711 if (retval) 712 goto error_submit_read_urbs; 713 714 usb_autopm_put_interface(acm->control); 715 716 mutex_unlock(&acm->mutex); 717 718 return 0; 719 720error_submit_read_urbs: 721 for (i = 0; i < acm->rx_buflimit; i++) 722 usb_kill_urb(acm->read_urbs[i]); 723 usb_kill_urb(acm->ctrlurb); 724error_submit_urb: 725 usb_autopm_put_interface(acm->control); 726error_get_interface: 727disconnected: 728 mutex_unlock(&acm->mutex); 729 730 return usb_translate_errors(retval); 731} 732 733static void acm_port_destruct(struct tty_port *port) 734{ 735 struct acm *acm = container_of(port, struct acm, port); 736 737 if (acm->minor != ACM_MINOR_INVALID) 738 acm_release_minor(acm); 739 usb_put_intf(acm->control); 740 kfree(acm->country_codes); 741 kfree(acm); 742} 743 744static void acm_port_shutdown(struct tty_port *port) 745{ 746 struct acm *acm = container_of(port, struct acm, port); 747 struct urb *urb; 748 struct acm_wb *wb; 749 750 /* 751 * Need to grab write_lock to prevent race with resume, but no need to 752 * hold it due to the tty-port initialised flag. 753 */ 754 acm_poison_urbs(acm); 755 spin_lock_irq(&acm->write_lock); 756 spin_unlock_irq(&acm->write_lock); 757 758 usb_autopm_get_interface_no_resume(acm->control); 759 acm->control->needs_remote_wakeup = 0; 760 usb_autopm_put_interface(acm->control); 761 762 for (;;) { 763 urb = usb_get_from_anchor(&acm->delayed); 764 if (!urb) 765 break; 766 wb = urb->context; 767 wb->use = false; 768 usb_autopm_put_interface_async(acm->control); 769 } 770 771 acm_unpoison_urbs(acm); 772 773} 774 775static void acm_tty_cleanup(struct tty_struct *tty) 776{ 777 struct acm *acm = tty->driver_data; 778 779 tty_port_put(&acm->port); 780} 781 782static void acm_tty_hangup(struct tty_struct *tty) 783{ 784 struct acm *acm = tty->driver_data; 785 786 tty_port_hangup(&acm->port); 787} 788 789static void acm_tty_close(struct tty_struct *tty, struct file *filp) 790{ 791 struct acm *acm = tty->driver_data; 792 793 tty_port_close(&acm->port, tty, filp); 794} 795 796static int acm_tty_write(struct tty_struct *tty, 797 const unsigned char *buf, int count) 798{ 799 struct acm *acm = tty->driver_data; 800 int stat; 801 unsigned long flags; 802 int wbn; 803 struct acm_wb *wb; 804 805 if (!count) 806 return 0; 807 808 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 809 810 spin_lock_irqsave(&acm->write_lock, flags); 811 wbn = acm_wb_alloc(acm); 812 if (wbn < 0) { 813 spin_unlock_irqrestore(&acm->write_lock, flags); 814 return 0; 815 } 816 wb = &acm->wb[wbn]; 817 818 if (!acm->dev) { 819 wb->use = false; 820 spin_unlock_irqrestore(&acm->write_lock, flags); 821 return -ENODEV; 822 } 823 824 count = (count > acm->writesize) ? acm->writesize : count; 825 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 826 memcpy(wb->buf, buf, count); 827 wb->len = count; 828 829 stat = usb_autopm_get_interface_async(acm->control); 830 if (stat) { 831 wb->use = false; 832 spin_unlock_irqrestore(&acm->write_lock, flags); 833 return stat; 834 } 835 836 if (acm->susp_count) { 837 usb_anchor_urb(wb->urb, &acm->delayed); 838 spin_unlock_irqrestore(&acm->write_lock, flags); 839 return count; 840 } 841 842 stat = acm_start_wb(acm, wb); 843 spin_unlock_irqrestore(&acm->write_lock, flags); 844 845 if (stat < 0) 846 return stat; 847 return count; 848} 849 850static int acm_tty_write_room(struct tty_struct *tty) 851{ 852 struct acm *acm = tty->driver_data; 853 /* 854 * Do not let the line discipline to know that we have a reserve, 855 * or it might get too enthusiastic. 856 */ 857 return acm_wb_is_avail(acm) ? acm->writesize : 0; 858} 859 860static int acm_tty_chars_in_buffer(struct tty_struct *tty) 861{ 862 struct acm *acm = tty->driver_data; 863 /* 864 * if the device was unplugged then any remaining characters fell out 865 * of the connector ;) 866 */ 867 if (acm->disconnected) 868 return 0; 869 /* 870 * This is inaccurate (overcounts), but it works. 871 */ 872 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 873} 874 875static void acm_tty_throttle(struct tty_struct *tty) 876{ 877 struct acm *acm = tty->driver_data; 878 879 set_bit(ACM_THROTTLED, &acm->flags); 880} 881 882static void acm_tty_unthrottle(struct tty_struct *tty) 883{ 884 struct acm *acm = tty->driver_data; 885 886 clear_bit(ACM_THROTTLED, &acm->flags); 887 888 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 889 smp_mb(); 890 891 acm_submit_read_urbs(acm, GFP_KERNEL); 892} 893 894static int acm_tty_break_ctl(struct tty_struct *tty, int state) 895{ 896 struct acm *acm = tty->driver_data; 897 int retval; 898 899 if (!(acm->ctrl_caps & USB_CDC_CAP_BRK)) 900 return -EOPNOTSUPP; 901 902 retval = acm_send_break(acm, state ? 0xffff : 0); 903 if (retval < 0) 904 dev_dbg(&acm->control->dev, 905 "%s - send break failed\n", __func__); 906 return retval; 907} 908 909static int acm_tty_tiocmget(struct tty_struct *tty) 910{ 911 struct acm *acm = tty->driver_data; 912 913 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 914 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 915 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 916 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 917 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 918 TIOCM_CTS; 919} 920 921static int acm_tty_tiocmset(struct tty_struct *tty, 922 unsigned int set, unsigned int clear) 923{ 924 struct acm *acm = tty->driver_data; 925 unsigned int newctrl; 926 927 newctrl = acm->ctrlout; 928 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 929 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 930 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 931 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 932 933 newctrl = (newctrl & ~clear) | set; 934 935 if (acm->ctrlout == newctrl) 936 return 0; 937 return acm_set_control(acm, acm->ctrlout = newctrl); 938} 939 940static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 941{ 942 struct acm *acm = tty->driver_data; 943 944 ss->line = acm->minor; 945 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 946 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 947 ASYNC_CLOSING_WAIT_NONE : 948 jiffies_to_msecs(acm->port.closing_wait) / 10; 949 return 0; 950} 951 952static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 953{ 954 struct acm *acm = tty->driver_data; 955 unsigned int closing_wait, close_delay; 956 int retval = 0; 957 958 close_delay = msecs_to_jiffies(ss->close_delay * 10); 959 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 960 ASYNC_CLOSING_WAIT_NONE : 961 msecs_to_jiffies(ss->closing_wait * 10); 962 963 mutex_lock(&acm->port.mutex); 964 965 if (!capable(CAP_SYS_ADMIN)) { 966 if ((close_delay != acm->port.close_delay) || 967 (closing_wait != acm->port.closing_wait)) 968 retval = -EPERM; 969 } else { 970 acm->port.close_delay = close_delay; 971 acm->port.closing_wait = closing_wait; 972 } 973 974 mutex_unlock(&acm->port.mutex); 975 return retval; 976} 977 978static int wait_serial_change(struct acm *acm, unsigned long arg) 979{ 980 int rv = 0; 981 DECLARE_WAITQUEUE(wait, current); 982 struct async_icount old, new; 983 984 do { 985 spin_lock_irq(&acm->read_lock); 986 old = acm->oldcount; 987 new = acm->iocount; 988 acm->oldcount = new; 989 spin_unlock_irq(&acm->read_lock); 990 991 if ((arg & TIOCM_DSR) && 992 old.dsr != new.dsr) 993 break; 994 if ((arg & TIOCM_CD) && 995 old.dcd != new.dcd) 996 break; 997 if ((arg & TIOCM_RI) && 998 old.rng != new.rng) 999 break; 1000 1001 add_wait_queue(&acm->wioctl, &wait); 1002 set_current_state(TASK_INTERRUPTIBLE); 1003 schedule(); 1004 remove_wait_queue(&acm->wioctl, &wait); 1005 if (acm->disconnected) { 1006 if (arg & TIOCM_CD) 1007 break; 1008 else 1009 rv = -ENODEV; 1010 } else { 1011 if (signal_pending(current)) 1012 rv = -ERESTARTSYS; 1013 } 1014 } while (!rv); 1015 1016 1017 1018 return rv; 1019} 1020 1021static int acm_tty_get_icount(struct tty_struct *tty, 1022 struct serial_icounter_struct *icount) 1023{ 1024 struct acm *acm = tty->driver_data; 1025 1026 icount->dsr = acm->iocount.dsr; 1027 icount->rng = acm->iocount.rng; 1028 icount->dcd = acm->iocount.dcd; 1029 icount->frame = acm->iocount.frame; 1030 icount->overrun = acm->iocount.overrun; 1031 icount->parity = acm->iocount.parity; 1032 icount->brk = acm->iocount.brk; 1033 1034 return 0; 1035} 1036 1037static int acm_tty_ioctl(struct tty_struct *tty, 1038 unsigned int cmd, unsigned long arg) 1039{ 1040 struct acm *acm = tty->driver_data; 1041 int rv = -ENOIOCTLCMD; 1042 1043 switch (cmd) { 1044 case TIOCMIWAIT: 1045 rv = usb_autopm_get_interface(acm->control); 1046 if (rv < 0) { 1047 rv = -EIO; 1048 break; 1049 } 1050 rv = wait_serial_change(acm, arg); 1051 usb_autopm_put_interface(acm->control); 1052 break; 1053 } 1054 1055 return rv; 1056} 1057 1058static void acm_tty_set_termios(struct tty_struct *tty, 1059 struct ktermios *termios_old) 1060{ 1061 struct acm *acm = tty->driver_data; 1062 struct ktermios *termios = &tty->termios; 1063 struct usb_cdc_line_coding newline; 1064 int newctrl = acm->ctrlout; 1065 1066 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1067 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1068 newline.bParityType = termios->c_cflag & PARENB ? 1069 (termios->c_cflag & PARODD ? 1 : 2) + 1070 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1071 switch (termios->c_cflag & CSIZE) { 1072 case CS5: 1073 newline.bDataBits = 5; 1074 break; 1075 case CS6: 1076 newline.bDataBits = 6; 1077 break; 1078 case CS7: 1079 newline.bDataBits = 7; 1080 break; 1081 case CS8: 1082 default: 1083 newline.bDataBits = 8; 1084 break; 1085 } 1086 /* FIXME: Needs to clear unsupported bits in the termios */ 1087 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1088 1089 if (C_BAUD(tty) == B0) { 1090 newline.dwDTERate = acm->line.dwDTERate; 1091 newctrl &= ~ACM_CTRL_DTR; 1092 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1093 newctrl |= ACM_CTRL_DTR; 1094 } 1095 1096 if (newctrl != acm->ctrlout) 1097 acm_set_control(acm, acm->ctrlout = newctrl); 1098 1099 if (memcmp(&acm->line, &newline, sizeof newline)) { 1100 memcpy(&acm->line, &newline, sizeof newline); 1101 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1102 __func__, 1103 le32_to_cpu(newline.dwDTERate), 1104 newline.bCharFormat, newline.bParityType, 1105 newline.bDataBits); 1106 acm_set_line(acm, &acm->line); 1107 } 1108} 1109 1110static const struct tty_port_operations acm_port_ops = { 1111 .dtr_rts = acm_port_dtr_rts, 1112 .shutdown = acm_port_shutdown, 1113 .activate = acm_port_activate, 1114 .destruct = acm_port_destruct, 1115}; 1116 1117/* 1118 * USB probe and disconnect routines. 1119 */ 1120 1121/* Little helpers: write/read buffers free */ 1122static void acm_write_buffers_free(struct acm *acm) 1123{ 1124 int i; 1125 struct acm_wb *wb; 1126 1127 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1128 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1129} 1130 1131static void acm_read_buffers_free(struct acm *acm) 1132{ 1133 int i; 1134 1135 for (i = 0; i < acm->rx_buflimit; i++) 1136 usb_free_coherent(acm->dev, acm->readsize, 1137 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1138} 1139 1140/* Little helper: write buffers allocate */ 1141static int acm_write_buffers_alloc(struct acm *acm) 1142{ 1143 int i; 1144 struct acm_wb *wb; 1145 1146 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1147 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1148 &wb->dmah); 1149 if (!wb->buf) { 1150 while (i != 0) { 1151 --i; 1152 --wb; 1153 usb_free_coherent(acm->dev, acm->writesize, 1154 wb->buf, wb->dmah); 1155 } 1156 return -ENOMEM; 1157 } 1158 } 1159 return 0; 1160} 1161 1162static int acm_probe(struct usb_interface *intf, 1163 const struct usb_device_id *id) 1164{ 1165 struct usb_cdc_union_desc *union_header = NULL; 1166 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1167 unsigned char *buffer = intf->altsetting->extra; 1168 int buflen = intf->altsetting->extralen; 1169 struct usb_interface *control_interface; 1170 struct usb_interface *data_interface; 1171 struct usb_endpoint_descriptor *epctrl = NULL; 1172 struct usb_endpoint_descriptor *epread = NULL; 1173 struct usb_endpoint_descriptor *epwrite = NULL; 1174 struct usb_device *usb_dev = interface_to_usbdev(intf); 1175 struct usb_cdc_parsed_header h; 1176 struct acm *acm; 1177 int minor; 1178 int ctrlsize, readsize; 1179 u8 *buf; 1180 int call_intf_num = -1; 1181 int data_intf_num = -1; 1182 unsigned long quirks; 1183 int num_rx_buf; 1184 int i; 1185 int combined_interfaces = 0; 1186 struct device *tty_dev; 1187 int rv = -ENOMEM; 1188 int res; 1189 1190 /* normal quirks */ 1191 quirks = (unsigned long)id->driver_info; 1192 1193 if (quirks == IGNORE_DEVICE) 1194 return -ENODEV; 1195 1196 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1197 1198 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1199 1200 /* handle quirks deadly to normal probing*/ 1201 if (quirks == NO_UNION_NORMAL) { 1202 data_interface = usb_ifnum_to_if(usb_dev, 1); 1203 control_interface = usb_ifnum_to_if(usb_dev, 0); 1204 /* we would crash */ 1205 if (!data_interface || !control_interface) 1206 return -ENODEV; 1207 goto skip_normal_probe; 1208 } 1209 1210 /* normal probing*/ 1211 if (!buffer) { 1212 dev_err(&intf->dev, "Weird descriptor references\n"); 1213 return -EINVAL; 1214 } 1215 1216 if (!buflen) { 1217 if (intf->cur_altsetting->endpoint && 1218 intf->cur_altsetting->endpoint->extralen && 1219 intf->cur_altsetting->endpoint->extra) { 1220 dev_dbg(&intf->dev, 1221 "Seeking extra descriptors on endpoint\n"); 1222 buflen = intf->cur_altsetting->endpoint->extralen; 1223 buffer = intf->cur_altsetting->endpoint->extra; 1224 } else { 1225 dev_err(&intf->dev, 1226 "Zero length descriptor references\n"); 1227 return -EINVAL; 1228 } 1229 } 1230 1231 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1232 union_header = h.usb_cdc_union_desc; 1233 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1234 if (cmgmd) 1235 call_intf_num = cmgmd->bDataInterface; 1236 1237 if (!union_header) { 1238 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1239 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1240 combined_interfaces = 1; 1241 control_interface = data_interface = intf; 1242 goto look_for_collapsed_interface; 1243 } else if (call_intf_num > 0) { 1244 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1245 data_intf_num = call_intf_num; 1246 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1247 control_interface = intf; 1248 } else { 1249 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1250 return -ENODEV; 1251 } 1252 } else { 1253 int class = -1; 1254 1255 data_intf_num = union_header->bSlaveInterface0; 1256 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1257 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1258 1259 if (control_interface) 1260 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1261 1262 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1263 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1264 combined_interfaces = 1; 1265 control_interface = data_interface = intf; 1266 goto look_for_collapsed_interface; 1267 } 1268 } 1269 1270 if (!control_interface || !data_interface) { 1271 dev_dbg(&intf->dev, "no interfaces\n"); 1272 return -ENODEV; 1273 } 1274 1275 if (data_intf_num != call_intf_num) 1276 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1277 1278 if (control_interface == data_interface) { 1279 /* some broken devices designed for windows work this way */ 1280 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1281 combined_interfaces = 1; 1282 /* a popular other OS doesn't use it */ 1283 quirks |= NO_CAP_LINE; 1284 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1285 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1286 return -EINVAL; 1287 } 1288look_for_collapsed_interface: 1289 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1290 &epread, &epwrite, &epctrl, NULL); 1291 if (res) 1292 return res; 1293 1294 goto made_compressed_probe; 1295 } 1296 1297skip_normal_probe: 1298 1299 /*workaround for switched interfaces */ 1300 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1301 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1302 dev_dbg(&intf->dev, 1303 "Your device has switched interfaces.\n"); 1304 swap(control_interface, data_interface); 1305 } else { 1306 return -EINVAL; 1307 } 1308 } 1309 1310 /* Accept probe requests only for the control interface */ 1311 if (!combined_interfaces && intf != control_interface) 1312 return -ENODEV; 1313 1314 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1315 /* valid in this context */ 1316 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1317 return -EBUSY; 1318 } 1319 1320 1321 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1322 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1323 return -EINVAL; 1324 1325 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1326 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1327 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1328 1329 1330 /* workaround for switched endpoints */ 1331 if (!usb_endpoint_dir_in(epread)) { 1332 /* descriptors are swapped */ 1333 dev_dbg(&intf->dev, 1334 "The data interface has switched endpoints\n"); 1335 swap(epread, epwrite); 1336 } 1337made_compressed_probe: 1338 dev_dbg(&intf->dev, "interfaces are valid\n"); 1339 1340 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1341 if (acm == NULL) 1342 goto alloc_fail; 1343 1344 tty_port_init(&acm->port); 1345 acm->port.ops = &acm_port_ops; 1346 1347 ctrlsize = usb_endpoint_maxp(epctrl); 1348 readsize = usb_endpoint_maxp(epread) * 1349 (quirks == SINGLE_RX_URB ? 1 : 2); 1350 acm->combined_interfaces = combined_interfaces; 1351 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1352 acm->control = control_interface; 1353 acm->data = data_interface; 1354 1355 usb_get_intf(acm->control); /* undone in destruct() */ 1356 1357 minor = acm_alloc_minor(acm); 1358 if (minor < 0) { 1359 acm->minor = ACM_MINOR_INVALID; 1360 goto alloc_fail1; 1361 } 1362 1363 acm->minor = minor; 1364 acm->dev = usb_dev; 1365 if (h.usb_cdc_acm_descriptor) 1366 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1367 if (quirks & NO_CAP_LINE) 1368 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1369 acm->ctrlsize = ctrlsize; 1370 acm->readsize = readsize; 1371 acm->rx_buflimit = num_rx_buf; 1372 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1373 init_waitqueue_head(&acm->wioctl); 1374 spin_lock_init(&acm->write_lock); 1375 spin_lock_init(&acm->read_lock); 1376 mutex_init(&acm->mutex); 1377 if (usb_endpoint_xfer_int(epread)) { 1378 acm->bInterval = epread->bInterval; 1379 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1380 } else { 1381 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1382 } 1383 if (usb_endpoint_xfer_int(epwrite)) 1384 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1385 else 1386 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1387 init_usb_anchor(&acm->delayed); 1388 acm->quirks = quirks; 1389 1390 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1391 if (!buf) 1392 goto alloc_fail1; 1393 acm->ctrl_buffer = buf; 1394 1395 if (acm_write_buffers_alloc(acm) < 0) 1396 goto alloc_fail2; 1397 1398 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1399 if (!acm->ctrlurb) 1400 goto alloc_fail3; 1401 1402 for (i = 0; i < num_rx_buf; i++) { 1403 struct acm_rb *rb = &(acm->read_buffers[i]); 1404 struct urb *urb; 1405 1406 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1407 &rb->dma); 1408 if (!rb->base) 1409 goto alloc_fail4; 1410 rb->index = i; 1411 rb->instance = acm; 1412 1413 urb = usb_alloc_urb(0, GFP_KERNEL); 1414 if (!urb) 1415 goto alloc_fail4; 1416 1417 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1418 urb->transfer_dma = rb->dma; 1419 if (usb_endpoint_xfer_int(epread)) 1420 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1421 acm->readsize, 1422 acm_read_bulk_callback, rb, 1423 acm->bInterval); 1424 else 1425 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1426 acm->readsize, 1427 acm_read_bulk_callback, rb); 1428 1429 acm->read_urbs[i] = urb; 1430 __set_bit(i, &acm->read_urbs_free); 1431 } 1432 for (i = 0; i < ACM_NW; i++) { 1433 struct acm_wb *snd = &(acm->wb[i]); 1434 1435 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1436 if (snd->urb == NULL) 1437 goto alloc_fail5; 1438 1439 if (usb_endpoint_xfer_int(epwrite)) 1440 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1441 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1442 else 1443 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1444 NULL, acm->writesize, acm_write_bulk, snd); 1445 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1446 if (quirks & SEND_ZERO_PACKET) 1447 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1448 snd->instance = acm; 1449 } 1450 1451 usb_set_intfdata(intf, acm); 1452 1453 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1454 if (i < 0) 1455 goto alloc_fail5; 1456 1457 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1458 struct usb_cdc_country_functional_desc * cfd = 1459 h.usb_cdc_country_functional_desc; 1460 1461 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1462 if (!acm->country_codes) 1463 goto skip_countries; 1464 acm->country_code_size = cfd->bLength - 4; 1465 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1466 cfd->bLength - 4); 1467 acm->country_rel_date = cfd->iCountryCodeRelDate; 1468 1469 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1470 if (i < 0) { 1471 kfree(acm->country_codes); 1472 acm->country_codes = NULL; 1473 acm->country_code_size = 0; 1474 goto skip_countries; 1475 } 1476 1477 i = device_create_file(&intf->dev, 1478 &dev_attr_iCountryCodeRelDate); 1479 if (i < 0) { 1480 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1481 kfree(acm->country_codes); 1482 acm->country_codes = NULL; 1483 acm->country_code_size = 0; 1484 goto skip_countries; 1485 } 1486 } 1487 1488skip_countries: 1489 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1490 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1491 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1492 /* works around buggy devices */ 1493 epctrl->bInterval ? epctrl->bInterval : 16); 1494 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1495 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1496 acm->notification_buffer = NULL; 1497 acm->nb_index = 0; 1498 acm->nb_size = 0; 1499 1500 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1501 1502 acm->line.dwDTERate = cpu_to_le32(9600); 1503 acm->line.bDataBits = 8; 1504 acm_set_line(acm, &acm->line); 1505 1506 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1507 usb_set_intfdata(data_interface, acm); 1508 1509 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1510 &control_interface->dev); 1511 if (IS_ERR(tty_dev)) { 1512 rv = PTR_ERR(tty_dev); 1513 goto alloc_fail6; 1514 } 1515 1516 if (quirks & CLEAR_HALT_CONDITIONS) { 1517 usb_clear_halt(usb_dev, acm->in); 1518 usb_clear_halt(usb_dev, acm->out); 1519 } 1520 1521 return 0; 1522alloc_fail6: 1523 if (!acm->combined_interfaces) { 1524 /* Clear driver data so that disconnect() returns early. */ 1525 usb_set_intfdata(data_interface, NULL); 1526 usb_driver_release_interface(&acm_driver, data_interface); 1527 } 1528 if (acm->country_codes) { 1529 device_remove_file(&acm->control->dev, 1530 &dev_attr_wCountryCodes); 1531 device_remove_file(&acm->control->dev, 1532 &dev_attr_iCountryCodeRelDate); 1533 } 1534 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1535alloc_fail5: 1536 usb_set_intfdata(intf, NULL); 1537 for (i = 0; i < ACM_NW; i++) 1538 usb_free_urb(acm->wb[i].urb); 1539alloc_fail4: 1540 for (i = 0; i < num_rx_buf; i++) 1541 usb_free_urb(acm->read_urbs[i]); 1542 acm_read_buffers_free(acm); 1543 usb_free_urb(acm->ctrlurb); 1544alloc_fail3: 1545 acm_write_buffers_free(acm); 1546alloc_fail2: 1547 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1548alloc_fail1: 1549 tty_port_put(&acm->port); 1550alloc_fail: 1551 return rv; 1552} 1553 1554static void acm_disconnect(struct usb_interface *intf) 1555{ 1556 struct acm *acm = usb_get_intfdata(intf); 1557 struct tty_struct *tty; 1558 int i; 1559 1560 /* sibling interface is already cleaning up */ 1561 if (!acm) 1562 return; 1563 1564 acm->disconnected = true; 1565 /* 1566 * there is a circular dependency. acm_softint() can resubmit 1567 * the URBs in error handling so we need to block any 1568 * submission right away 1569 */ 1570 acm_poison_urbs(acm); 1571 mutex_lock(&acm->mutex); 1572 if (acm->country_codes) { 1573 device_remove_file(&acm->control->dev, 1574 &dev_attr_wCountryCodes); 1575 device_remove_file(&acm->control->dev, 1576 &dev_attr_iCountryCodeRelDate); 1577 } 1578 wake_up_all(&acm->wioctl); 1579 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1580 usb_set_intfdata(acm->control, NULL); 1581 usb_set_intfdata(acm->data, NULL); 1582 mutex_unlock(&acm->mutex); 1583 1584 tty = tty_port_tty_get(&acm->port); 1585 if (tty) { 1586 tty_vhangup(tty); 1587 tty_kref_put(tty); 1588 } 1589 1590 cancel_delayed_work_sync(&acm->dwork); 1591 1592 tty_unregister_device(acm_tty_driver, acm->minor); 1593 1594 usb_free_urb(acm->ctrlurb); 1595 for (i = 0; i < ACM_NW; i++) 1596 usb_free_urb(acm->wb[i].urb); 1597 for (i = 0; i < acm->rx_buflimit; i++) 1598 usb_free_urb(acm->read_urbs[i]); 1599 acm_write_buffers_free(acm); 1600 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1601 acm_read_buffers_free(acm); 1602 1603 kfree(acm->notification_buffer); 1604 1605 if (!acm->combined_interfaces) 1606 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1607 acm->data : acm->control); 1608 1609 tty_port_put(&acm->port); 1610} 1611 1612#ifdef CONFIG_PM 1613static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1614{ 1615 struct acm *acm = usb_get_intfdata(intf); 1616 int cnt; 1617 1618 spin_lock_irq(&acm->write_lock); 1619 if (PMSG_IS_AUTO(message)) { 1620 if (acm->transmitting) { 1621 spin_unlock_irq(&acm->write_lock); 1622 return -EBUSY; 1623 } 1624 } 1625 cnt = acm->susp_count++; 1626 spin_unlock_irq(&acm->write_lock); 1627 1628 if (cnt) 1629 return 0; 1630 1631 acm_poison_urbs(acm); 1632 cancel_delayed_work_sync(&acm->dwork); 1633 acm->urbs_in_error_delay = 0; 1634 1635 return 0; 1636} 1637 1638static int acm_resume(struct usb_interface *intf) 1639{ 1640 struct acm *acm = usb_get_intfdata(intf); 1641 struct urb *urb; 1642 int rv = 0; 1643 1644 spin_lock_irq(&acm->write_lock); 1645 1646 if (--acm->susp_count) 1647 goto out; 1648 1649 acm_unpoison_urbs(acm); 1650 1651 if (tty_port_initialized(&acm->port)) { 1652 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1653 1654 for (;;) { 1655 urb = usb_get_from_anchor(&acm->delayed); 1656 if (!urb) 1657 break; 1658 1659 acm_start_wb(acm, urb->context); 1660 } 1661 1662 /* 1663 * delayed error checking because we must 1664 * do the write path at all cost 1665 */ 1666 if (rv < 0) 1667 goto out; 1668 1669 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1670 } 1671out: 1672 spin_unlock_irq(&acm->write_lock); 1673 1674 return rv; 1675} 1676 1677static int acm_reset_resume(struct usb_interface *intf) 1678{ 1679 struct acm *acm = usb_get_intfdata(intf); 1680 1681 if (tty_port_initialized(&acm->port)) 1682 tty_port_tty_hangup(&acm->port, false); 1683 1684 return acm_resume(intf); 1685} 1686 1687#endif /* CONFIG_PM */ 1688 1689static int acm_pre_reset(struct usb_interface *intf) 1690{ 1691 struct acm *acm = usb_get_intfdata(intf); 1692 1693 clear_bit(EVENT_RX_STALL, &acm->flags); 1694 acm->nb_index = 0; /* pending control transfers are lost */ 1695 1696 return 0; 1697} 1698 1699#define NOKIA_PCSUITE_ACM_INFO(x) \ 1700 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1701 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1702 USB_CDC_ACM_PROTO_VENDOR) 1703 1704#define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1705 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1706 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1707 USB_CDC_ACM_PROTO_VENDOR) 1708 1709/* 1710 * USB driver structure. 1711 */ 1712 1713static const struct usb_device_id acm_ids[] = { 1714 /* quirky and broken devices */ 1715 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1716 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1717 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1718 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1719 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1720 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1721 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1722 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1723 }, 1724 { USB_DEVICE(0x045b, 0x023c), /* Renesas USB Download mode */ 1725 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1726 }, 1727 { USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */ 1728 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1729 }, 1730 { USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */ 1731 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1732 }, 1733 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1734 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1735 }, 1736 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1737 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1738 }, 1739 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1740 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1741 }, 1742 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1743 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1744 }, 1745 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1746 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1747 }, 1748 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1749 .driver_info = SINGLE_RX_URB, 1750 }, 1751 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1752 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1753 }, 1754 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1755 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1756 }, 1757 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1758 .driver_info = SINGLE_RX_URB, 1759 }, 1760 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1761 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1762 }, 1763 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1764 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1765 }, 1766 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1767 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1768 }, 1769 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1770 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1771 }, 1772 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1773 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1774 }, 1775 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1776 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1777 }, 1778 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1779 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1780 }, 1781 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1782 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1783 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1784 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1785 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1786 }, 1787 /* Motorola H24 HSPA module: */ 1788 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1789 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1790 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1791 }, 1792 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1793 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1794 }, 1795 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1796 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1797 }, 1798 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1799 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1800 }, 1801 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1802 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1803 }, 1804 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1805 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1806 }, 1807 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1808 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1809 }, 1810 1811 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1812 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1813 data interface instead of 1814 communications interface. 1815 Maybe we should define a new 1816 quirk for this. */ 1817 }, 1818 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1819 .driver_info = NO_UNION_NORMAL, 1820 }, 1821 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1822 .driver_info = NO_UNION_NORMAL, 1823 }, 1824 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1825 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1826 }, 1827 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1828 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1829 }, 1830 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1831 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1832 }, 1833 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1834 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1835 }, 1836 { USB_DEVICE(0x0c26, 0x0020), /* Icom ICF3400 Serie */ 1837 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1838 }, 1839 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1840 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1841 }, 1842 1843 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1844 .driver_info = CLEAR_HALT_CONDITIONS, 1845 }, 1846 1847 /* Nokia S60 phones expose two ACM channels. The first is 1848 * a modem and is picked up by the standard AT-command 1849 * information below. The second is 'vendor-specific' but 1850 * is treated as a serial device at the S60 end, so we want 1851 * to expose it on Linux too. */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1888 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1889 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1890 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1891 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1892 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1893 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1894 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1895 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1896 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1897 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1898 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1899 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1900 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1901 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1902 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1903 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1904 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1905 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1906 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1907 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1908 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1909 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1910 1911 /* Support for Owen devices */ 1912 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1913 1914 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1915 1916#if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1917 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1918 .driver_info = IGNORE_DEVICE, 1919 }, 1920 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1921 .driver_info = IGNORE_DEVICE, 1922 }, 1923#endif 1924 1925#if IS_ENABLED(CONFIG_IR_TOY) 1926 { USB_DEVICE(0x04d8, 0xfd08), 1927 .driver_info = IGNORE_DEVICE, 1928 }, 1929 1930 { USB_DEVICE(0x04d8, 0xf58b), 1931 .driver_info = IGNORE_DEVICE, 1932 }, 1933#endif 1934 1935 /*Samsung phone in firmware update mode */ 1936 { USB_DEVICE(0x04e8, 0x685d), 1937 .driver_info = IGNORE_DEVICE, 1938 }, 1939 1940 /* Exclude Infineon Flash Loader utility */ 1941 { USB_DEVICE(0x058b, 0x0041), 1942 .driver_info = IGNORE_DEVICE, 1943 }, 1944 1945 /* Exclude ETAS ES58x */ 1946 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 1947 .driver_info = IGNORE_DEVICE, 1948 }, 1949 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 1950 .driver_info = IGNORE_DEVICE, 1951 }, 1952 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 1953 .driver_info = IGNORE_DEVICE, 1954 }, 1955 1956 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1957 .driver_info = SEND_ZERO_PACKET, 1958 }, 1959 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1960 .driver_info = SEND_ZERO_PACKET, 1961 }, 1962 1963 /* Exclude Goodix Fingerprint Reader */ 1964 { USB_DEVICE(0x27c6, 0x5395), 1965 .driver_info = IGNORE_DEVICE, 1966 }, 1967 1968 /* Exclude Heimann Sensor GmbH USB appset demo */ 1969 { USB_DEVICE(0x32a7, 0x0000), 1970 .driver_info = IGNORE_DEVICE, 1971 }, 1972 1973 /* control interfaces without any protocol set */ 1974 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1975 USB_CDC_PROTO_NONE) }, 1976 1977 /* control interfaces with various AT-command sets */ 1978 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1979 USB_CDC_ACM_PROTO_AT_V25TER) }, 1980 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1981 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1982 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1983 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1984 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1985 USB_CDC_ACM_PROTO_AT_GSM) }, 1986 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1987 USB_CDC_ACM_PROTO_AT_3G) }, 1988 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1989 USB_CDC_ACM_PROTO_AT_CDMA) }, 1990 1991 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1992 .driver_info = SEND_ZERO_PACKET, 1993 }, 1994 1995 { } 1996}; 1997 1998MODULE_DEVICE_TABLE(usb, acm_ids); 1999 2000static struct usb_driver acm_driver = { 2001 .name = "cdc_acm", 2002 .probe = acm_probe, 2003 .disconnect = acm_disconnect, 2004#ifdef CONFIG_PM 2005 .suspend = acm_suspend, 2006 .resume = acm_resume, 2007 .reset_resume = acm_reset_resume, 2008#endif 2009 .pre_reset = acm_pre_reset, 2010 .id_table = acm_ids, 2011#ifdef CONFIG_PM 2012 .supports_autosuspend = 1, 2013#endif 2014 .disable_hub_initiated_lpm = 1, 2015}; 2016 2017/* 2018 * TTY driver structures. 2019 */ 2020 2021static const struct tty_operations acm_ops = { 2022 .install = acm_tty_install, 2023 .open = acm_tty_open, 2024 .close = acm_tty_close, 2025 .cleanup = acm_tty_cleanup, 2026 .hangup = acm_tty_hangup, 2027 .write = acm_tty_write, 2028 .write_room = acm_tty_write_room, 2029 .ioctl = acm_tty_ioctl, 2030 .throttle = acm_tty_throttle, 2031 .unthrottle = acm_tty_unthrottle, 2032 .chars_in_buffer = acm_tty_chars_in_buffer, 2033 .break_ctl = acm_tty_break_ctl, 2034 .set_termios = acm_tty_set_termios, 2035 .tiocmget = acm_tty_tiocmget, 2036 .tiocmset = acm_tty_tiocmset, 2037 .get_serial = get_serial_info, 2038 .set_serial = set_serial_info, 2039 .get_icount = acm_tty_get_icount, 2040}; 2041 2042/* 2043 * Init / exit. 2044 */ 2045 2046static int __init acm_init(void) 2047{ 2048 int retval; 2049 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 2050 if (!acm_tty_driver) 2051 return -ENOMEM; 2052 acm_tty_driver->driver_name = "acm", 2053 acm_tty_driver->name = "ttyACM", 2054 acm_tty_driver->major = ACM_TTY_MAJOR, 2055 acm_tty_driver->minor_start = 0, 2056 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2057 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2058 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2059 acm_tty_driver->init_termios = tty_std_termios; 2060 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2061 HUPCL | CLOCAL; 2062 tty_set_operations(acm_tty_driver, &acm_ops); 2063 2064 retval = tty_register_driver(acm_tty_driver); 2065 if (retval) { 2066 put_tty_driver(acm_tty_driver); 2067 return retval; 2068 } 2069 2070 retval = usb_register(&acm_driver); 2071 if (retval) { 2072 tty_unregister_driver(acm_tty_driver); 2073 put_tty_driver(acm_tty_driver); 2074 return retval; 2075 } 2076 2077 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2078 2079 return 0; 2080} 2081 2082static void __exit acm_exit(void) 2083{ 2084 usb_deregister(&acm_driver); 2085 tty_unregister_driver(acm_tty_driver); 2086 put_tty_driver(acm_tty_driver); 2087 idr_destroy(&acm_minors); 2088} 2089 2090module_init(acm_init); 2091module_exit(acm_exit); 2092 2093MODULE_AUTHOR(DRIVER_AUTHOR); 2094MODULE_DESCRIPTION(DRIVER_DESC); 2095MODULE_LICENSE("GPL"); 2096MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2097