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_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 } 160 161 static 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 */ 177 178 static 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 } 197 198 static 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 */ 215 static 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 */ 227 228 static 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 */ 253 static 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 } 261 static DEVICE_ATTR_RO(bmCapabilities); 262 263 static 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 } 272 273 static DEVICE_ATTR_RO(wCountryCodes); 274 275 static 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 } 283 284 static DEVICE_ATTR_RO(iCountryCodeRelDate); 285 /* 286 * Interrupt handlers for various ACM device responses 287 */ 288 289 static 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 (difference) 344 wake_up_all(&acm->wioctl); 345 346 break; 347 348 default: 349 dev_dbg(&acm->control->dev, 350 "%s - unknown notification %d received: index %d len %d\n", 351 __func__, 352 dr->bNotificationType, dr->wIndex, dr->wLength); 353 } 354 } 355 356 /* control interface reports status changes with "interrupt" transfers */ 357 static void acm_ctrl_irq(struct urb *urb) 358 { 359 struct acm *acm = urb->context; 360 struct usb_cdc_notification *dr = urb->transfer_buffer; 361 unsigned int current_size = urb->actual_length; 362 unsigned int expected_size, copy_size, alloc_size; 363 int retval; 364 int status = urb->status; 365 366 switch (status) { 367 case 0: 368 /* success */ 369 break; 370 case -ECONNRESET: 371 case -ENOENT: 372 case -ESHUTDOWN: 373 /* this urb is terminated, clean up */ 374 dev_dbg(&acm->control->dev, 375 "%s - urb shutting down with status: %d\n", 376 __func__, status); 377 return; 378 default: 379 dev_dbg(&acm->control->dev, 380 "%s - nonzero urb status received: %d\n", 381 __func__, status); 382 goto exit; 383 } 384 385 usb_mark_last_busy(acm->dev); 386 387 if (acm->nb_index) 388 dr = (struct usb_cdc_notification *)acm->notification_buffer; 389 390 /* size = notification-header + (optional) data */ 391 expected_size = sizeof(struct usb_cdc_notification) + 392 le16_to_cpu(dr->wLength); 393 394 if (current_size < expected_size) { 395 /* notification is transmitted fragmented, reassemble */ 396 if (acm->nb_size < expected_size) { 397 u8 *new_buffer; 398 alloc_size = roundup_pow_of_two(expected_size); 399 /* Final freeing is done on disconnect. */ 400 new_buffer = krealloc(acm->notification_buffer, 401 alloc_size, GFP_ATOMIC); 402 if (!new_buffer) { 403 acm->nb_index = 0; 404 goto exit; 405 } 406 407 acm->notification_buffer = new_buffer; 408 acm->nb_size = alloc_size; 409 dr = (struct usb_cdc_notification *)acm->notification_buffer; 410 } 411 412 copy_size = min(current_size, 413 expected_size - acm->nb_index); 414 415 memcpy(&acm->notification_buffer[acm->nb_index], 416 urb->transfer_buffer, copy_size); 417 acm->nb_index += copy_size; 418 current_size = acm->nb_index; 419 } 420 421 if (current_size >= expected_size) { 422 /* notification complete */ 423 acm_process_notification(acm, (unsigned char *)dr); 424 acm->nb_index = 0; 425 } 426 427 exit: 428 retval = usb_submit_urb(urb, GFP_ATOMIC); 429 if (retval && retval != -EPERM && retval != -ENODEV) 430 dev_err(&acm->control->dev, 431 "%s - usb_submit_urb failed: %d\n", __func__, retval); 432 else 433 dev_vdbg(&acm->control->dev, 434 "control resubmission terminated %d\n", retval); 435 } 436 437 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 438 { 439 int res; 440 441 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 442 return 0; 443 444 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 445 if (res) { 446 if (res != -EPERM && res != -ENODEV) { 447 dev_err(&acm->data->dev, 448 "urb %d failed submission with %d\n", 449 index, res); 450 } else { 451 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 452 } 453 set_bit(index, &acm->read_urbs_free); 454 return res; 455 } else { 456 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 457 } 458 459 return 0; 460 } 461 462 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 463 { 464 int res; 465 int i; 466 467 for (i = 0; i < acm->rx_buflimit; ++i) { 468 res = acm_submit_read_urb(acm, i, mem_flags); 469 if (res) 470 return res; 471 } 472 473 return 0; 474 } 475 476 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 477 { 478 if (!urb->actual_length) 479 return; 480 481 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 482 urb->actual_length); 483 tty_flip_buffer_push(&acm->port); 484 } 485 486 static void acm_read_bulk_callback(struct urb *urb) 487 { 488 struct acm_rb *rb = urb->context; 489 struct acm *acm = rb->instance; 490 int status = urb->status; 491 bool stopped = false; 492 bool stalled = false; 493 bool cooldown = false; 494 495 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 496 rb->index, urb->actual_length, status); 497 498 switch (status) { 499 case 0: 500 usb_mark_last_busy(acm->dev); 501 acm_process_read_urb(acm, urb); 502 break; 503 case -EPIPE: 504 set_bit(EVENT_RX_STALL, &acm->flags); 505 stalled = true; 506 break; 507 case -ENOENT: 508 case -ECONNRESET: 509 case -ESHUTDOWN: 510 dev_dbg(&acm->data->dev, 511 "%s - urb shutting down with status: %d\n", 512 __func__, status); 513 stopped = true; 514 break; 515 case -EOVERFLOW: 516 case -EPROTO: 517 dev_dbg(&acm->data->dev, 518 "%s - cooling babbling device\n", __func__); 519 usb_mark_last_busy(acm->dev); 520 set_bit(rb->index, &acm->urbs_in_error_delay); 521 set_bit(ACM_ERROR_DELAY, &acm->flags); 522 cooldown = true; 523 break; 524 default: 525 dev_dbg(&acm->data->dev, 526 "%s - nonzero urb status received: %d\n", 527 __func__, status); 528 break; 529 } 530 531 /* 532 * Make sure URB processing is done before marking as free to avoid 533 * racing with unthrottle() on another CPU. Matches the barriers 534 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 535 */ 536 smp_mb__before_atomic(); 537 set_bit(rb->index, &acm->read_urbs_free); 538 /* 539 * Make sure URB is marked as free before checking the throttled flag 540 * to avoid racing with unthrottle() on another CPU. Matches the 541 * smp_mb() in unthrottle(). 542 */ 543 smp_mb__after_atomic(); 544 545 if (stopped || stalled || cooldown) { 546 if (stalled) 547 schedule_delayed_work(&acm->dwork, 0); 548 else if (cooldown) 549 schedule_delayed_work(&acm->dwork, HZ / 2); 550 return; 551 } 552 553 if (test_bit(ACM_THROTTLED, &acm->flags)) 554 return; 555 556 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 557 } 558 559 /* data interface wrote those outgoing bytes */ 560 static void acm_write_bulk(struct urb *urb) 561 { 562 struct acm_wb *wb = urb->context; 563 struct acm *acm = wb->instance; 564 unsigned long flags; 565 int status = urb->status; 566 567 if (status || (urb->actual_length != urb->transfer_buffer_length)) 568 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 569 urb->actual_length, 570 urb->transfer_buffer_length, 571 status); 572 573 spin_lock_irqsave(&acm->write_lock, flags); 574 acm_write_done(acm, wb); 575 spin_unlock_irqrestore(&acm->write_lock, flags); 576 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 577 schedule_delayed_work(&acm->dwork, 0); 578 } 579 580 static void acm_softint(struct work_struct *work) 581 { 582 int i; 583 struct acm *acm = container_of(work, struct acm, dwork.work); 584 585 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 586 smp_mb(); /* against acm_suspend() */ 587 if (!acm->susp_count) { 588 for (i = 0; i < acm->rx_buflimit; i++) 589 usb_kill_urb(acm->read_urbs[i]); 590 usb_clear_halt(acm->dev, acm->in); 591 acm_submit_read_urbs(acm, GFP_KERNEL); 592 clear_bit(EVENT_RX_STALL, &acm->flags); 593 } 594 } 595 596 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 597 for (i = 0; i < acm->rx_buflimit; i++) 598 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 599 acm_submit_read_urb(acm, i, GFP_KERNEL); 600 } 601 602 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 603 tty_port_tty_wakeup(&acm->port); 604 } 605 606 /* 607 * TTY handlers 608 */ 609 610 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 611 { 612 struct acm *acm; 613 int retval; 614 615 acm = acm_get_by_minor(tty->index); 616 if (!acm) 617 return -ENODEV; 618 619 retval = tty_standard_install(driver, tty); 620 if (retval) 621 goto error_init_termios; 622 623 /* 624 * Suppress initial echoing for some devices which might send data 625 * immediately after acm driver has been installed. 626 */ 627 if (acm->quirks & DISABLE_ECHO) 628 tty->termios.c_lflag &= ~ECHO; 629 630 tty->driver_data = acm; 631 632 return 0; 633 634 error_init_termios: 635 tty_port_put(&acm->port); 636 return retval; 637 } 638 639 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 640 { 641 struct acm *acm = tty->driver_data; 642 643 return tty_port_open(&acm->port, tty, filp); 644 } 645 646 static void acm_port_dtr_rts(struct tty_port *port, int raise) 647 { 648 struct acm *acm = container_of(port, struct acm, port); 649 int val; 650 int res; 651 652 if (raise) 653 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 654 else 655 val = 0; 656 657 /* FIXME: add missing ctrlout locking throughout driver */ 658 acm->ctrlout = val; 659 660 res = acm_set_control(acm, val); 661 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 662 /* This is broken in too many devices to spam the logs */ 663 dev_dbg(&acm->control->dev, "failed to set dtr/rts\n"); 664 } 665 666 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 667 { 668 struct acm *acm = container_of(port, struct acm, port); 669 int retval = -ENODEV; 670 int i; 671 672 mutex_lock(&acm->mutex); 673 if (acm->disconnected) 674 goto disconnected; 675 676 retval = usb_autopm_get_interface(acm->control); 677 if (retval) 678 goto error_get_interface; 679 680 /* 681 * FIXME: Why do we need this? Allocating 64K of physically contiguous 682 * memory is really nasty... 683 */ 684 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 685 acm->control->needs_remote_wakeup = 1; 686 687 acm->ctrlurb->dev = acm->dev; 688 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 689 if (retval) { 690 dev_err(&acm->control->dev, 691 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 692 goto error_submit_urb; 693 } 694 695 acm_tty_set_termios(tty, NULL); 696 697 /* 698 * Unthrottle device in case the TTY was closed while throttled. 699 */ 700 clear_bit(ACM_THROTTLED, &acm->flags); 701 702 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 703 if (retval) 704 goto error_submit_read_urbs; 705 706 usb_autopm_put_interface(acm->control); 707 708 mutex_unlock(&acm->mutex); 709 710 return 0; 711 712 error_submit_read_urbs: 713 for (i = 0; i < acm->rx_buflimit; i++) 714 usb_kill_urb(acm->read_urbs[i]); 715 usb_kill_urb(acm->ctrlurb); 716 error_submit_urb: 717 usb_autopm_put_interface(acm->control); 718 error_get_interface: 719 disconnected: 720 mutex_unlock(&acm->mutex); 721 722 return usb_translate_errors(retval); 723 } 724 725 static void acm_port_destruct(struct tty_port *port) 726 { 727 struct acm *acm = container_of(port, struct acm, port); 728 729 acm_release_minor(acm); 730 usb_put_intf(acm->control); 731 kfree(acm->country_codes); 732 kfree(acm); 733 } 734 735 static void acm_port_shutdown(struct tty_port *port) 736 { 737 struct acm *acm = container_of(port, struct acm, port); 738 struct urb *urb; 739 struct acm_wb *wb; 740 741 /* 742 * Need to grab write_lock to prevent race with resume, but no need to 743 * hold it due to the tty-port initialised flag. 744 */ 745 acm_poison_urbs(acm); 746 spin_lock_irq(&acm->write_lock); 747 spin_unlock_irq(&acm->write_lock); 748 749 usb_autopm_get_interface_no_resume(acm->control); 750 acm->control->needs_remote_wakeup = 0; 751 usb_autopm_put_interface(acm->control); 752 753 for (;;) { 754 urb = usb_get_from_anchor(&acm->delayed); 755 if (!urb) 756 break; 757 wb = urb->context; 758 wb->use = false; 759 usb_autopm_put_interface_async(acm->control); 760 } 761 762 acm_unpoison_urbs(acm); 763 764 } 765 766 static void acm_tty_cleanup(struct tty_struct *tty) 767 { 768 struct acm *acm = tty->driver_data; 769 770 tty_port_put(&acm->port); 771 } 772 773 static void acm_tty_hangup(struct tty_struct *tty) 774 { 775 struct acm *acm = tty->driver_data; 776 777 tty_port_hangup(&acm->port); 778 } 779 780 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 781 { 782 struct acm *acm = tty->driver_data; 783 784 tty_port_close(&acm->port, tty, filp); 785 } 786 787 static int acm_tty_write(struct tty_struct *tty, 788 const unsigned char *buf, int count) 789 { 790 struct acm *acm = tty->driver_data; 791 int stat; 792 unsigned long flags; 793 int wbn; 794 struct acm_wb *wb; 795 796 if (!count) 797 return 0; 798 799 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 800 801 spin_lock_irqsave(&acm->write_lock, flags); 802 wbn = acm_wb_alloc(acm); 803 if (wbn < 0) { 804 spin_unlock_irqrestore(&acm->write_lock, flags); 805 return 0; 806 } 807 wb = &acm->wb[wbn]; 808 809 if (!acm->dev) { 810 wb->use = false; 811 spin_unlock_irqrestore(&acm->write_lock, flags); 812 return -ENODEV; 813 } 814 815 count = (count > acm->writesize) ? acm->writesize : count; 816 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 817 memcpy(wb->buf, buf, count); 818 wb->len = count; 819 820 stat = usb_autopm_get_interface_async(acm->control); 821 if (stat) { 822 wb->use = false; 823 spin_unlock_irqrestore(&acm->write_lock, flags); 824 return stat; 825 } 826 827 if (acm->susp_count) { 828 usb_anchor_urb(wb->urb, &acm->delayed); 829 spin_unlock_irqrestore(&acm->write_lock, flags); 830 return count; 831 } 832 833 stat = acm_start_wb(acm, wb); 834 spin_unlock_irqrestore(&acm->write_lock, flags); 835 836 if (stat < 0) 837 return stat; 838 return count; 839 } 840 841 static unsigned int acm_tty_write_room(struct tty_struct *tty) 842 { 843 struct acm *acm = tty->driver_data; 844 /* 845 * Do not let the line discipline to know that we have a reserve, 846 * or it might get too enthusiastic. 847 */ 848 return acm_wb_is_avail(acm) ? acm->writesize : 0; 849 } 850 851 static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty) 852 { 853 struct acm *acm = tty->driver_data; 854 /* 855 * if the device was unplugged then any remaining characters fell out 856 * of the connector ;) 857 */ 858 if (acm->disconnected) 859 return 0; 860 /* 861 * This is inaccurate (overcounts), but it works. 862 */ 863 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 864 } 865 866 static void acm_tty_throttle(struct tty_struct *tty) 867 { 868 struct acm *acm = tty->driver_data; 869 870 set_bit(ACM_THROTTLED, &acm->flags); 871 } 872 873 static void acm_tty_unthrottle(struct tty_struct *tty) 874 { 875 struct acm *acm = tty->driver_data; 876 877 clear_bit(ACM_THROTTLED, &acm->flags); 878 879 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 880 smp_mb(); 881 882 acm_submit_read_urbs(acm, GFP_KERNEL); 883 } 884 885 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 886 { 887 struct acm *acm = tty->driver_data; 888 int retval; 889 890 retval = acm_send_break(acm, state ? 0xffff : 0); 891 if (retval < 0) 892 dev_dbg(&acm->control->dev, 893 "%s - send break failed\n", __func__); 894 return retval; 895 } 896 897 static int acm_tty_tiocmget(struct tty_struct *tty) 898 { 899 struct acm *acm = tty->driver_data; 900 901 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 902 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 903 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 904 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 905 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 906 TIOCM_CTS; 907 } 908 909 static int acm_tty_tiocmset(struct tty_struct *tty, 910 unsigned int set, unsigned int clear) 911 { 912 struct acm *acm = tty->driver_data; 913 unsigned int newctrl; 914 915 newctrl = acm->ctrlout; 916 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 917 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 918 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 919 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 920 921 newctrl = (newctrl & ~clear) | set; 922 923 if (acm->ctrlout == newctrl) 924 return 0; 925 return acm_set_control(acm, acm->ctrlout = newctrl); 926 } 927 928 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 929 { 930 struct acm *acm = tty->driver_data; 931 932 ss->line = acm->minor; 933 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 934 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 935 ASYNC_CLOSING_WAIT_NONE : 936 jiffies_to_msecs(acm->port.closing_wait) / 10; 937 return 0; 938 } 939 940 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 941 { 942 struct acm *acm = tty->driver_data; 943 unsigned int closing_wait, close_delay; 944 int retval = 0; 945 946 close_delay = msecs_to_jiffies(ss->close_delay * 10); 947 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 948 ASYNC_CLOSING_WAIT_NONE : 949 msecs_to_jiffies(ss->closing_wait * 10); 950 951 mutex_lock(&acm->port.mutex); 952 953 if (!capable(CAP_SYS_ADMIN)) { 954 if ((close_delay != acm->port.close_delay) || 955 (closing_wait != acm->port.closing_wait)) 956 retval = -EPERM; 957 } else { 958 acm->port.close_delay = close_delay; 959 acm->port.closing_wait = closing_wait; 960 } 961 962 mutex_unlock(&acm->port.mutex); 963 return retval; 964 } 965 966 static int wait_serial_change(struct acm *acm, unsigned long arg) 967 { 968 int rv = 0; 969 DECLARE_WAITQUEUE(wait, current); 970 struct async_icount old, new; 971 972 do { 973 spin_lock_irq(&acm->read_lock); 974 old = acm->oldcount; 975 new = acm->iocount; 976 acm->oldcount = new; 977 spin_unlock_irq(&acm->read_lock); 978 979 if ((arg & TIOCM_DSR) && 980 old.dsr != new.dsr) 981 break; 982 if ((arg & TIOCM_CD) && 983 old.dcd != new.dcd) 984 break; 985 if ((arg & TIOCM_RI) && 986 old.rng != new.rng) 987 break; 988 989 add_wait_queue(&acm->wioctl, &wait); 990 set_current_state(TASK_INTERRUPTIBLE); 991 schedule(); 992 remove_wait_queue(&acm->wioctl, &wait); 993 if (acm->disconnected) { 994 if (arg & TIOCM_CD) 995 break; 996 else 997 rv = -ENODEV; 998 } else { 999 if (signal_pending(current)) 1000 rv = -ERESTARTSYS; 1001 } 1002 } while (!rv); 1003 1004 1005 1006 return rv; 1007 } 1008 1009 static int acm_tty_get_icount(struct tty_struct *tty, 1010 struct serial_icounter_struct *icount) 1011 { 1012 struct acm *acm = tty->driver_data; 1013 1014 icount->dsr = acm->iocount.dsr; 1015 icount->rng = acm->iocount.rng; 1016 icount->dcd = acm->iocount.dcd; 1017 icount->frame = acm->iocount.frame; 1018 icount->overrun = acm->iocount.overrun; 1019 icount->parity = acm->iocount.parity; 1020 icount->brk = acm->iocount.brk; 1021 1022 return 0; 1023 } 1024 1025 static int acm_tty_ioctl(struct tty_struct *tty, 1026 unsigned int cmd, unsigned long arg) 1027 { 1028 struct acm *acm = tty->driver_data; 1029 int rv = -ENOIOCTLCMD; 1030 1031 switch (cmd) { 1032 case TIOCMIWAIT: 1033 rv = usb_autopm_get_interface(acm->control); 1034 if (rv < 0) { 1035 rv = -EIO; 1036 break; 1037 } 1038 rv = wait_serial_change(acm, arg); 1039 usb_autopm_put_interface(acm->control); 1040 break; 1041 } 1042 1043 return rv; 1044 } 1045 1046 static void acm_tty_set_termios(struct tty_struct *tty, 1047 struct ktermios *termios_old) 1048 { 1049 struct acm *acm = tty->driver_data; 1050 struct ktermios *termios = &tty->termios; 1051 struct usb_cdc_line_coding newline; 1052 int newctrl = acm->ctrlout; 1053 1054 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1055 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1056 newline.bParityType = termios->c_cflag & PARENB ? 1057 (termios->c_cflag & PARODD ? 1 : 2) + 1058 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1059 newline.bDataBits = tty_get_char_size(termios->c_cflag); 1060 1061 /* FIXME: Needs to clear unsupported bits in the termios */ 1062 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1063 1064 if (C_BAUD(tty) == B0) { 1065 newline.dwDTERate = acm->line.dwDTERate; 1066 newctrl &= ~ACM_CTRL_DTR; 1067 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1068 newctrl |= ACM_CTRL_DTR; 1069 } 1070 1071 if (newctrl != acm->ctrlout) 1072 acm_set_control(acm, acm->ctrlout = newctrl); 1073 1074 if (memcmp(&acm->line, &newline, sizeof newline)) { 1075 memcpy(&acm->line, &newline, sizeof newline); 1076 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1077 __func__, 1078 le32_to_cpu(newline.dwDTERate), 1079 newline.bCharFormat, newline.bParityType, 1080 newline.bDataBits); 1081 acm_set_line(acm, &acm->line); 1082 } 1083 } 1084 1085 static const struct tty_port_operations acm_port_ops = { 1086 .dtr_rts = acm_port_dtr_rts, 1087 .shutdown = acm_port_shutdown, 1088 .activate = acm_port_activate, 1089 .destruct = acm_port_destruct, 1090 }; 1091 1092 /* 1093 * USB probe and disconnect routines. 1094 */ 1095 1096 /* Little helpers: write/read buffers free */ 1097 static void acm_write_buffers_free(struct acm *acm) 1098 { 1099 int i; 1100 struct acm_wb *wb; 1101 1102 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1103 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1104 } 1105 1106 static void acm_read_buffers_free(struct acm *acm) 1107 { 1108 int i; 1109 1110 for (i = 0; i < acm->rx_buflimit; i++) 1111 usb_free_coherent(acm->dev, acm->readsize, 1112 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1113 } 1114 1115 /* Little helper: write buffers allocate */ 1116 static int acm_write_buffers_alloc(struct acm *acm) 1117 { 1118 int i; 1119 struct acm_wb *wb; 1120 1121 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1122 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1123 &wb->dmah); 1124 if (!wb->buf) { 1125 while (i != 0) { 1126 --i; 1127 --wb; 1128 usb_free_coherent(acm->dev, acm->writesize, 1129 wb->buf, wb->dmah); 1130 } 1131 return -ENOMEM; 1132 } 1133 } 1134 return 0; 1135 } 1136 1137 static int acm_probe(struct usb_interface *intf, 1138 const struct usb_device_id *id) 1139 { 1140 struct usb_cdc_union_desc *union_header = NULL; 1141 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1142 unsigned char *buffer = intf->altsetting->extra; 1143 int buflen = intf->altsetting->extralen; 1144 struct usb_interface *control_interface; 1145 struct usb_interface *data_interface; 1146 struct usb_endpoint_descriptor *epctrl = NULL; 1147 struct usb_endpoint_descriptor *epread = NULL; 1148 struct usb_endpoint_descriptor *epwrite = NULL; 1149 struct usb_device *usb_dev = interface_to_usbdev(intf); 1150 struct usb_cdc_parsed_header h; 1151 struct acm *acm; 1152 int minor; 1153 int ctrlsize, readsize; 1154 u8 *buf; 1155 int call_intf_num = -1; 1156 int data_intf_num = -1; 1157 unsigned long quirks; 1158 int num_rx_buf; 1159 int i; 1160 int combined_interfaces = 0; 1161 struct device *tty_dev; 1162 int rv = -ENOMEM; 1163 int res; 1164 1165 /* normal quirks */ 1166 quirks = (unsigned long)id->driver_info; 1167 1168 if (quirks == IGNORE_DEVICE) 1169 return -ENODEV; 1170 1171 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1172 1173 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1174 1175 /* handle quirks deadly to normal probing*/ 1176 if (quirks == NO_UNION_NORMAL) { 1177 data_interface = usb_ifnum_to_if(usb_dev, 1); 1178 control_interface = usb_ifnum_to_if(usb_dev, 0); 1179 /* we would crash */ 1180 if (!data_interface || !control_interface) 1181 return -ENODEV; 1182 goto skip_normal_probe; 1183 } 1184 1185 /* normal probing*/ 1186 if (!buffer) { 1187 dev_err(&intf->dev, "Weird descriptor references\n"); 1188 return -EINVAL; 1189 } 1190 1191 if (!buflen) { 1192 if (intf->cur_altsetting->endpoint && 1193 intf->cur_altsetting->endpoint->extralen && 1194 intf->cur_altsetting->endpoint->extra) { 1195 dev_dbg(&intf->dev, 1196 "Seeking extra descriptors on endpoint\n"); 1197 buflen = intf->cur_altsetting->endpoint->extralen; 1198 buffer = intf->cur_altsetting->endpoint->extra; 1199 } else { 1200 dev_err(&intf->dev, 1201 "Zero length descriptor references\n"); 1202 return -EINVAL; 1203 } 1204 } 1205 1206 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1207 union_header = h.usb_cdc_union_desc; 1208 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1209 if (cmgmd) 1210 call_intf_num = cmgmd->bDataInterface; 1211 1212 if (!union_header) { 1213 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1214 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1215 combined_interfaces = 1; 1216 control_interface = data_interface = intf; 1217 goto look_for_collapsed_interface; 1218 } else if (call_intf_num > 0) { 1219 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1220 data_intf_num = call_intf_num; 1221 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1222 control_interface = intf; 1223 } else { 1224 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1225 return -ENODEV; 1226 } 1227 } else { 1228 int class = -1; 1229 1230 data_intf_num = union_header->bSlaveInterface0; 1231 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1232 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1233 1234 if (control_interface) 1235 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1236 1237 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1238 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1239 combined_interfaces = 1; 1240 control_interface = data_interface = intf; 1241 goto look_for_collapsed_interface; 1242 } 1243 } 1244 1245 if (!control_interface || !data_interface) { 1246 dev_dbg(&intf->dev, "no interfaces\n"); 1247 return -ENODEV; 1248 } 1249 1250 if (data_intf_num != call_intf_num) 1251 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1252 1253 if (control_interface == data_interface) { 1254 /* some broken devices designed for windows work this way */ 1255 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1256 combined_interfaces = 1; 1257 /* a popular other OS doesn't use it */ 1258 quirks |= NO_CAP_LINE; 1259 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1260 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1261 return -EINVAL; 1262 } 1263 look_for_collapsed_interface: 1264 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1265 &epread, &epwrite, &epctrl, NULL); 1266 if (res) 1267 return res; 1268 1269 goto made_compressed_probe; 1270 } 1271 1272 skip_normal_probe: 1273 1274 /*workaround for switched interfaces */ 1275 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1276 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1277 dev_dbg(&intf->dev, 1278 "Your device has switched interfaces.\n"); 1279 swap(control_interface, data_interface); 1280 } else { 1281 return -EINVAL; 1282 } 1283 } 1284 1285 /* Accept probe requests only for the control interface */ 1286 if (!combined_interfaces && intf != control_interface) 1287 return -ENODEV; 1288 1289 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1290 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1291 return -EINVAL; 1292 1293 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1294 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1295 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1296 1297 1298 /* workaround for switched endpoints */ 1299 if (!usb_endpoint_dir_in(epread)) { 1300 /* descriptors are swapped */ 1301 dev_dbg(&intf->dev, 1302 "The data interface has switched endpoints\n"); 1303 swap(epread, epwrite); 1304 } 1305 made_compressed_probe: 1306 dev_dbg(&intf->dev, "interfaces are valid\n"); 1307 1308 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1309 if (!acm) 1310 return -ENOMEM; 1311 1312 tty_port_init(&acm->port); 1313 acm->port.ops = &acm_port_ops; 1314 1315 ctrlsize = usb_endpoint_maxp(epctrl); 1316 readsize = usb_endpoint_maxp(epread) * 1317 (quirks == SINGLE_RX_URB ? 1 : 2); 1318 acm->combined_interfaces = combined_interfaces; 1319 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1320 acm->control = control_interface; 1321 acm->data = data_interface; 1322 1323 usb_get_intf(acm->control); /* undone in destruct() */ 1324 1325 minor = acm_alloc_minor(acm); 1326 if (minor < 0) 1327 goto err_put_port; 1328 1329 acm->minor = minor; 1330 acm->dev = usb_dev; 1331 if (h.usb_cdc_acm_descriptor) 1332 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1333 if (quirks & NO_CAP_LINE) 1334 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1335 acm->ctrlsize = ctrlsize; 1336 acm->readsize = readsize; 1337 acm->rx_buflimit = num_rx_buf; 1338 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1339 init_waitqueue_head(&acm->wioctl); 1340 spin_lock_init(&acm->write_lock); 1341 spin_lock_init(&acm->read_lock); 1342 mutex_init(&acm->mutex); 1343 if (usb_endpoint_xfer_int(epread)) { 1344 acm->bInterval = epread->bInterval; 1345 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1346 } else { 1347 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1348 } 1349 if (usb_endpoint_xfer_int(epwrite)) 1350 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1351 else 1352 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1353 init_usb_anchor(&acm->delayed); 1354 acm->quirks = quirks; 1355 1356 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1357 if (!buf) 1358 goto err_put_port; 1359 acm->ctrl_buffer = buf; 1360 1361 if (acm_write_buffers_alloc(acm) < 0) 1362 goto err_free_ctrl_buffer; 1363 1364 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1365 if (!acm->ctrlurb) 1366 goto err_free_write_buffers; 1367 1368 for (i = 0; i < num_rx_buf; i++) { 1369 struct acm_rb *rb = &(acm->read_buffers[i]); 1370 struct urb *urb; 1371 1372 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1373 &rb->dma); 1374 if (!rb->base) 1375 goto err_free_read_urbs; 1376 rb->index = i; 1377 rb->instance = acm; 1378 1379 urb = usb_alloc_urb(0, GFP_KERNEL); 1380 if (!urb) 1381 goto err_free_read_urbs; 1382 1383 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1384 urb->transfer_dma = rb->dma; 1385 if (usb_endpoint_xfer_int(epread)) 1386 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1387 acm->readsize, 1388 acm_read_bulk_callback, rb, 1389 acm->bInterval); 1390 else 1391 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1392 acm->readsize, 1393 acm_read_bulk_callback, rb); 1394 1395 acm->read_urbs[i] = urb; 1396 __set_bit(i, &acm->read_urbs_free); 1397 } 1398 for (i = 0; i < ACM_NW; i++) { 1399 struct acm_wb *snd = &(acm->wb[i]); 1400 1401 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1402 if (!snd->urb) 1403 goto err_free_write_urbs; 1404 1405 if (usb_endpoint_xfer_int(epwrite)) 1406 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1407 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1408 else 1409 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1410 NULL, acm->writesize, acm_write_bulk, snd); 1411 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1412 if (quirks & SEND_ZERO_PACKET) 1413 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1414 snd->instance = acm; 1415 } 1416 1417 usb_set_intfdata(intf, acm); 1418 1419 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1420 if (i < 0) 1421 goto err_free_write_urbs; 1422 1423 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1424 struct usb_cdc_country_functional_desc * cfd = 1425 h.usb_cdc_country_functional_desc; 1426 1427 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1428 if (!acm->country_codes) 1429 goto skip_countries; 1430 acm->country_code_size = cfd->bLength - 4; 1431 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1432 cfd->bLength - 4); 1433 acm->country_rel_date = cfd->iCountryCodeRelDate; 1434 1435 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1436 if (i < 0) { 1437 kfree(acm->country_codes); 1438 acm->country_codes = NULL; 1439 acm->country_code_size = 0; 1440 goto skip_countries; 1441 } 1442 1443 i = device_create_file(&intf->dev, 1444 &dev_attr_iCountryCodeRelDate); 1445 if (i < 0) { 1446 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1447 kfree(acm->country_codes); 1448 acm->country_codes = NULL; 1449 acm->country_code_size = 0; 1450 goto skip_countries; 1451 } 1452 } 1453 1454 skip_countries: 1455 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1456 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1457 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1458 /* works around buggy devices */ 1459 epctrl->bInterval ? epctrl->bInterval : 16); 1460 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1461 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1462 acm->notification_buffer = NULL; 1463 acm->nb_index = 0; 1464 acm->nb_size = 0; 1465 1466 acm->line.dwDTERate = cpu_to_le32(9600); 1467 acm->line.bDataBits = 8; 1468 acm_set_line(acm, &acm->line); 1469 1470 if (!acm->combined_interfaces) { 1471 rv = usb_driver_claim_interface(&acm_driver, data_interface, acm); 1472 if (rv) 1473 goto err_remove_files; 1474 } 1475 1476 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1477 &control_interface->dev); 1478 if (IS_ERR(tty_dev)) { 1479 rv = PTR_ERR(tty_dev); 1480 goto err_release_data_interface; 1481 } 1482 1483 if (quirks & CLEAR_HALT_CONDITIONS) { 1484 usb_clear_halt(usb_dev, acm->in); 1485 usb_clear_halt(usb_dev, acm->out); 1486 } 1487 1488 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1489 1490 return 0; 1491 1492 err_release_data_interface: 1493 if (!acm->combined_interfaces) { 1494 /* Clear driver data so that disconnect() returns early. */ 1495 usb_set_intfdata(data_interface, NULL); 1496 usb_driver_release_interface(&acm_driver, data_interface); 1497 } 1498 err_remove_files: 1499 if (acm->country_codes) { 1500 device_remove_file(&acm->control->dev, 1501 &dev_attr_wCountryCodes); 1502 device_remove_file(&acm->control->dev, 1503 &dev_attr_iCountryCodeRelDate); 1504 } 1505 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1506 err_free_write_urbs: 1507 for (i = 0; i < ACM_NW; i++) 1508 usb_free_urb(acm->wb[i].urb); 1509 err_free_read_urbs: 1510 for (i = 0; i < num_rx_buf; i++) 1511 usb_free_urb(acm->read_urbs[i]); 1512 acm_read_buffers_free(acm); 1513 usb_free_urb(acm->ctrlurb); 1514 err_free_write_buffers: 1515 acm_write_buffers_free(acm); 1516 err_free_ctrl_buffer: 1517 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1518 err_put_port: 1519 tty_port_put(&acm->port); 1520 1521 return rv; 1522 } 1523 1524 static void acm_disconnect(struct usb_interface *intf) 1525 { 1526 struct acm *acm = usb_get_intfdata(intf); 1527 struct tty_struct *tty; 1528 int i; 1529 1530 /* sibling interface is already cleaning up */ 1531 if (!acm) 1532 return; 1533 1534 acm->disconnected = true; 1535 /* 1536 * there is a circular dependency. acm_softint() can resubmit 1537 * the URBs in error handling so we need to block any 1538 * submission right away 1539 */ 1540 acm_poison_urbs(acm); 1541 mutex_lock(&acm->mutex); 1542 if (acm->country_codes) { 1543 device_remove_file(&acm->control->dev, 1544 &dev_attr_wCountryCodes); 1545 device_remove_file(&acm->control->dev, 1546 &dev_attr_iCountryCodeRelDate); 1547 } 1548 wake_up_all(&acm->wioctl); 1549 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1550 usb_set_intfdata(acm->control, NULL); 1551 usb_set_intfdata(acm->data, NULL); 1552 mutex_unlock(&acm->mutex); 1553 1554 tty = tty_port_tty_get(&acm->port); 1555 if (tty) { 1556 tty_vhangup(tty); 1557 tty_kref_put(tty); 1558 } 1559 1560 cancel_delayed_work_sync(&acm->dwork); 1561 1562 tty_unregister_device(acm_tty_driver, acm->minor); 1563 1564 usb_free_urb(acm->ctrlurb); 1565 for (i = 0; i < ACM_NW; i++) 1566 usb_free_urb(acm->wb[i].urb); 1567 for (i = 0; i < acm->rx_buflimit; i++) 1568 usb_free_urb(acm->read_urbs[i]); 1569 acm_write_buffers_free(acm); 1570 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1571 acm_read_buffers_free(acm); 1572 1573 kfree(acm->notification_buffer); 1574 1575 if (!acm->combined_interfaces) 1576 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1577 acm->data : acm->control); 1578 1579 tty_port_put(&acm->port); 1580 } 1581 1582 #ifdef CONFIG_PM 1583 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1584 { 1585 struct acm *acm = usb_get_intfdata(intf); 1586 int cnt; 1587 1588 spin_lock_irq(&acm->write_lock); 1589 if (PMSG_IS_AUTO(message)) { 1590 if (acm->transmitting) { 1591 spin_unlock_irq(&acm->write_lock); 1592 return -EBUSY; 1593 } 1594 } 1595 cnt = acm->susp_count++; 1596 spin_unlock_irq(&acm->write_lock); 1597 1598 if (cnt) 1599 return 0; 1600 1601 acm_poison_urbs(acm); 1602 cancel_delayed_work_sync(&acm->dwork); 1603 acm->urbs_in_error_delay = 0; 1604 1605 return 0; 1606 } 1607 1608 static int acm_resume(struct usb_interface *intf) 1609 { 1610 struct acm *acm = usb_get_intfdata(intf); 1611 struct urb *urb; 1612 int rv = 0; 1613 1614 spin_lock_irq(&acm->write_lock); 1615 1616 if (--acm->susp_count) 1617 goto out; 1618 1619 acm_unpoison_urbs(acm); 1620 1621 if (tty_port_initialized(&acm->port)) { 1622 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1623 1624 for (;;) { 1625 urb = usb_get_from_anchor(&acm->delayed); 1626 if (!urb) 1627 break; 1628 1629 acm_start_wb(acm, urb->context); 1630 } 1631 1632 /* 1633 * delayed error checking because we must 1634 * do the write path at all cost 1635 */ 1636 if (rv < 0) 1637 goto out; 1638 1639 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1640 } 1641 out: 1642 spin_unlock_irq(&acm->write_lock); 1643 1644 return rv; 1645 } 1646 1647 static int acm_reset_resume(struct usb_interface *intf) 1648 { 1649 struct acm *acm = usb_get_intfdata(intf); 1650 1651 if (tty_port_initialized(&acm->port)) 1652 tty_port_tty_hangup(&acm->port, false); 1653 1654 return acm_resume(intf); 1655 } 1656 1657 #endif /* CONFIG_PM */ 1658 1659 static int acm_pre_reset(struct usb_interface *intf) 1660 { 1661 struct acm *acm = usb_get_intfdata(intf); 1662 1663 clear_bit(EVENT_RX_STALL, &acm->flags); 1664 acm->nb_index = 0; /* pending control transfers are lost */ 1665 1666 return 0; 1667 } 1668 1669 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1670 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1671 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1672 USB_CDC_ACM_PROTO_VENDOR) 1673 1674 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1675 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1676 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1677 USB_CDC_ACM_PROTO_VENDOR) 1678 1679 /* 1680 * USB driver structure. 1681 */ 1682 1683 static const struct usb_device_id acm_ids[] = { 1684 /* quirky and broken devices */ 1685 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1686 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1687 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1688 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1689 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1690 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1691 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1692 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1693 }, 1694 { USB_DEVICE(0x045b, 0x023c), /* Renesas USB Download mode */ 1695 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1696 }, 1697 { USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */ 1698 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1699 }, 1700 { USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */ 1701 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1702 }, 1703 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1704 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1705 }, 1706 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1707 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1708 }, 1709 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1710 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1711 }, 1712 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1713 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1714 }, 1715 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1716 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1717 }, 1718 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1719 .driver_info = SINGLE_RX_URB, 1720 }, 1721 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1722 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1723 }, 1724 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1725 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1726 }, 1727 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1728 .driver_info = SINGLE_RX_URB, 1729 }, 1730 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1731 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1732 }, 1733 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1734 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1735 }, 1736 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1737 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1738 }, 1739 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1740 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1741 }, 1742 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1743 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1744 }, 1745 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1746 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1747 }, 1748 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1749 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1750 }, 1751 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1752 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1753 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1754 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1755 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1756 }, 1757 /* Motorola H24 HSPA module: */ 1758 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1759 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1760 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1761 }, 1762 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1763 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1764 }, 1765 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1766 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1767 }, 1768 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1769 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1770 }, 1771 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1772 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1773 }, 1774 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1775 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1776 }, 1777 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1778 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1779 }, 1780 1781 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1782 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1783 data interface instead of 1784 communications interface. 1785 Maybe we should define a new 1786 quirk for this. */ 1787 }, 1788 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1789 .driver_info = NO_UNION_NORMAL, 1790 }, 1791 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1792 .driver_info = NO_UNION_NORMAL, 1793 }, 1794 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1795 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1796 }, 1797 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1798 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1799 }, 1800 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1801 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1802 }, 1803 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1804 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1805 }, 1806 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1807 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1808 }, 1809 1810 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1811 .driver_info = CLEAR_HALT_CONDITIONS, 1812 }, 1813 1814 /* Nokia S60 phones expose two ACM channels. The first is 1815 * a modem and is picked up by the standard AT-command 1816 * information below. The second is 'vendor-specific' but 1817 * is treated as a serial device at the S60 end, so we want 1818 * to expose it on Linux too. */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1820 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1821 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1822 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1823 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1824 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1825 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1826 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1827 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1828 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1829 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1830 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1876 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1877 1878 /* Support for Owen devices */ 1879 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1880 1881 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1882 1883 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1884 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1885 .driver_info = IGNORE_DEVICE, 1886 }, 1887 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1888 .driver_info = IGNORE_DEVICE, 1889 }, 1890 #endif 1891 1892 #if IS_ENABLED(CONFIG_IR_TOY) 1893 { USB_DEVICE(0x04d8, 0xfd08), 1894 .driver_info = IGNORE_DEVICE, 1895 }, 1896 1897 { USB_DEVICE(0x04d8, 0xf58b), 1898 .driver_info = IGNORE_DEVICE, 1899 }, 1900 #endif 1901 1902 #if IS_ENABLED(CONFIG_USB_SERIAL_XR) 1903 { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE }, 1904 { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE }, 1905 { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE }, 1906 { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE }, 1907 { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE }, 1908 { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE }, 1909 { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE }, 1910 { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE }, 1911 { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE }, 1912 { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE }, 1913 { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE }, 1914 #endif 1915 1916 /*Samsung phone in firmware update mode */ 1917 { USB_DEVICE(0x04e8, 0x685d), 1918 .driver_info = IGNORE_DEVICE, 1919 }, 1920 1921 /* Exclude Infineon Flash Loader utility */ 1922 { USB_DEVICE(0x058b, 0x0041), 1923 .driver_info = IGNORE_DEVICE, 1924 }, 1925 1926 /* Exclude ETAS ES58x */ 1927 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 1928 .driver_info = IGNORE_DEVICE, 1929 }, 1930 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 1931 .driver_info = IGNORE_DEVICE, 1932 }, 1933 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 1934 .driver_info = IGNORE_DEVICE, 1935 }, 1936 1937 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1938 .driver_info = SEND_ZERO_PACKET, 1939 }, 1940 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1941 .driver_info = SEND_ZERO_PACKET, 1942 }, 1943 1944 /* Exclude Goodix Fingerprint Reader */ 1945 { USB_DEVICE(0x27c6, 0x5395), 1946 .driver_info = IGNORE_DEVICE, 1947 }, 1948 1949 /* Exclude Heimann Sensor GmbH USB appset demo */ 1950 { USB_DEVICE(0x32a7, 0x0000), 1951 .driver_info = IGNORE_DEVICE, 1952 }, 1953 1954 /* control interfaces without any protocol set */ 1955 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1956 USB_CDC_PROTO_NONE) }, 1957 1958 /* control interfaces with various AT-command sets */ 1959 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1960 USB_CDC_ACM_PROTO_AT_V25TER) }, 1961 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1962 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1963 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1964 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1965 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1966 USB_CDC_ACM_PROTO_AT_GSM) }, 1967 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1968 USB_CDC_ACM_PROTO_AT_3G) }, 1969 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1970 USB_CDC_ACM_PROTO_AT_CDMA) }, 1971 1972 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1973 .driver_info = SEND_ZERO_PACKET, 1974 }, 1975 1976 { } 1977 }; 1978 1979 MODULE_DEVICE_TABLE(usb, acm_ids); 1980 1981 static struct usb_driver acm_driver = { 1982 .name = "cdc_acm", 1983 .probe = acm_probe, 1984 .disconnect = acm_disconnect, 1985 #ifdef CONFIG_PM 1986 .suspend = acm_suspend, 1987 .resume = acm_resume, 1988 .reset_resume = acm_reset_resume, 1989 #endif 1990 .pre_reset = acm_pre_reset, 1991 .id_table = acm_ids, 1992 #ifdef CONFIG_PM 1993 .supports_autosuspend = 1, 1994 #endif 1995 .disable_hub_initiated_lpm = 1, 1996 }; 1997 1998 /* 1999 * TTY driver structures. 2000 */ 2001 2002 static const struct tty_operations acm_ops = { 2003 .install = acm_tty_install, 2004 .open = acm_tty_open, 2005 .close = acm_tty_close, 2006 .cleanup = acm_tty_cleanup, 2007 .hangup = acm_tty_hangup, 2008 .write = acm_tty_write, 2009 .write_room = acm_tty_write_room, 2010 .ioctl = acm_tty_ioctl, 2011 .throttle = acm_tty_throttle, 2012 .unthrottle = acm_tty_unthrottle, 2013 .chars_in_buffer = acm_tty_chars_in_buffer, 2014 .break_ctl = acm_tty_break_ctl, 2015 .set_termios = acm_tty_set_termios, 2016 .tiocmget = acm_tty_tiocmget, 2017 .tiocmset = acm_tty_tiocmset, 2018 .get_serial = get_serial_info, 2019 .set_serial = set_serial_info, 2020 .get_icount = acm_tty_get_icount, 2021 }; 2022 2023 /* 2024 * Init / exit. 2025 */ 2026 2027 static int __init acm_init(void) 2028 { 2029 int retval; 2030 acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW | 2031 TTY_DRIVER_DYNAMIC_DEV); 2032 if (IS_ERR(acm_tty_driver)) 2033 return PTR_ERR(acm_tty_driver); 2034 acm_tty_driver->driver_name = "acm", 2035 acm_tty_driver->name = "ttyACM", 2036 acm_tty_driver->major = ACM_TTY_MAJOR, 2037 acm_tty_driver->minor_start = 0, 2038 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2039 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2040 acm_tty_driver->init_termios = tty_std_termios; 2041 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2042 HUPCL | CLOCAL; 2043 tty_set_operations(acm_tty_driver, &acm_ops); 2044 2045 retval = tty_register_driver(acm_tty_driver); 2046 if (retval) { 2047 tty_driver_kref_put(acm_tty_driver); 2048 return retval; 2049 } 2050 2051 retval = usb_register(&acm_driver); 2052 if (retval) { 2053 tty_unregister_driver(acm_tty_driver); 2054 tty_driver_kref_put(acm_tty_driver); 2055 return retval; 2056 } 2057 2058 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2059 2060 return 0; 2061 } 2062 2063 static void __exit acm_exit(void) 2064 { 2065 usb_deregister(&acm_driver); 2066 tty_unregister_driver(acm_tty_driver); 2067 tty_driver_kref_put(acm_tty_driver); 2068 idr_destroy(&acm_minors); 2069 } 2070 2071 module_init(acm_init); 2072 module_exit(acm_exit); 2073 2074 MODULE_AUTHOR(DRIVER_AUTHOR); 2075 MODULE_DESCRIPTION(DRIVER_DESC); 2076 MODULE_LICENSE("GPL"); 2077 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2078