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 (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 */ 360 static 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 } 429 430 exit: 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 } 439 440 static 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 } 464 465 static 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 } 478 479 static 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 } 493 494 static 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 */ 568 static 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 } 587 588 static 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 */ 617 618 static 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; 641 642 error_init_termios: 643 tty_port_put(&acm->port); 644 return retval; 645 } 646 647 static 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 } 653 654 static 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 } 673 674 static 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; 719 720 error_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); 724 error_submit_urb: 725 usb_autopm_put_interface(acm->control); 726 error_get_interface: 727 disconnected: 728 mutex_unlock(&acm->mutex); 729 730 return usb_translate_errors(retval); 731 } 732 733 static 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 } 743 744 static 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 } 774 775 static void acm_tty_cleanup(struct tty_struct *tty) 776 { 777 struct acm *acm = tty->driver_data; 778 779 tty_port_put(&acm->port); 780 } 781 782 static void acm_tty_hangup(struct tty_struct *tty) 783 { 784 struct acm *acm = tty->driver_data; 785 786 tty_port_hangup(&acm->port); 787 } 788 789 static 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 } 795 796 static 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 } 849 850 static unsigned 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 } 859 860 static unsigned 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 } 874 875 static 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 } 881 882 static 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 } 893 894 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 895 { 896 struct acm *acm = tty->driver_data; 897 int retval; 898 899 retval = acm_send_break(acm, state ? 0xffff : 0); 900 if (retval < 0) 901 dev_dbg(&acm->control->dev, 902 "%s - send break failed\n", __func__); 903 return retval; 904 } 905 906 static int acm_tty_tiocmget(struct tty_struct *tty) 907 { 908 struct acm *acm = tty->driver_data; 909 910 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 911 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 912 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 913 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 914 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 915 TIOCM_CTS; 916 } 917 918 static int acm_tty_tiocmset(struct tty_struct *tty, 919 unsigned int set, unsigned int clear) 920 { 921 struct acm *acm = tty->driver_data; 922 unsigned int newctrl; 923 924 newctrl = acm->ctrlout; 925 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 926 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 927 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 928 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 929 930 newctrl = (newctrl & ~clear) | set; 931 932 if (acm->ctrlout == newctrl) 933 return 0; 934 return acm_set_control(acm, acm->ctrlout = newctrl); 935 } 936 937 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 938 { 939 struct acm *acm = tty->driver_data; 940 941 ss->line = acm->minor; 942 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 943 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 944 ASYNC_CLOSING_WAIT_NONE : 945 jiffies_to_msecs(acm->port.closing_wait) / 10; 946 return 0; 947 } 948 949 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 950 { 951 struct acm *acm = tty->driver_data; 952 unsigned int closing_wait, close_delay; 953 int retval = 0; 954 955 close_delay = msecs_to_jiffies(ss->close_delay * 10); 956 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 957 ASYNC_CLOSING_WAIT_NONE : 958 msecs_to_jiffies(ss->closing_wait * 10); 959 960 mutex_lock(&acm->port.mutex); 961 962 if (!capable(CAP_SYS_ADMIN)) { 963 if ((close_delay != acm->port.close_delay) || 964 (closing_wait != acm->port.closing_wait)) 965 retval = -EPERM; 966 } else { 967 acm->port.close_delay = close_delay; 968 acm->port.closing_wait = closing_wait; 969 } 970 971 mutex_unlock(&acm->port.mutex); 972 return retval; 973 } 974 975 static int wait_serial_change(struct acm *acm, unsigned long arg) 976 { 977 int rv = 0; 978 DECLARE_WAITQUEUE(wait, current); 979 struct async_icount old, new; 980 981 do { 982 spin_lock_irq(&acm->read_lock); 983 old = acm->oldcount; 984 new = acm->iocount; 985 acm->oldcount = new; 986 spin_unlock_irq(&acm->read_lock); 987 988 if ((arg & TIOCM_DSR) && 989 old.dsr != new.dsr) 990 break; 991 if ((arg & TIOCM_CD) && 992 old.dcd != new.dcd) 993 break; 994 if ((arg & TIOCM_RI) && 995 old.rng != new.rng) 996 break; 997 998 add_wait_queue(&acm->wioctl, &wait); 999 set_current_state(TASK_INTERRUPTIBLE); 1000 schedule(); 1001 remove_wait_queue(&acm->wioctl, &wait); 1002 if (acm->disconnected) { 1003 if (arg & TIOCM_CD) 1004 break; 1005 else 1006 rv = -ENODEV; 1007 } else { 1008 if (signal_pending(current)) 1009 rv = -ERESTARTSYS; 1010 } 1011 } while (!rv); 1012 1013 1014 1015 return rv; 1016 } 1017 1018 static int acm_tty_get_icount(struct tty_struct *tty, 1019 struct serial_icounter_struct *icount) 1020 { 1021 struct acm *acm = tty->driver_data; 1022 1023 icount->dsr = acm->iocount.dsr; 1024 icount->rng = acm->iocount.rng; 1025 icount->dcd = acm->iocount.dcd; 1026 icount->frame = acm->iocount.frame; 1027 icount->overrun = acm->iocount.overrun; 1028 icount->parity = acm->iocount.parity; 1029 icount->brk = acm->iocount.brk; 1030 1031 return 0; 1032 } 1033 1034 static int acm_tty_ioctl(struct tty_struct *tty, 1035 unsigned int cmd, unsigned long arg) 1036 { 1037 struct acm *acm = tty->driver_data; 1038 int rv = -ENOIOCTLCMD; 1039 1040 switch (cmd) { 1041 case TIOCMIWAIT: 1042 rv = usb_autopm_get_interface(acm->control); 1043 if (rv < 0) { 1044 rv = -EIO; 1045 break; 1046 } 1047 rv = wait_serial_change(acm, arg); 1048 usb_autopm_put_interface(acm->control); 1049 break; 1050 } 1051 1052 return rv; 1053 } 1054 1055 static void acm_tty_set_termios(struct tty_struct *tty, 1056 struct ktermios *termios_old) 1057 { 1058 struct acm *acm = tty->driver_data; 1059 struct ktermios *termios = &tty->termios; 1060 struct usb_cdc_line_coding newline; 1061 int newctrl = acm->ctrlout; 1062 1063 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1064 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1065 newline.bParityType = termios->c_cflag & PARENB ? 1066 (termios->c_cflag & PARODD ? 1 : 2) + 1067 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1068 newline.bDataBits = tty_get_char_size(termios->c_cflag); 1069 1070 /* FIXME: Needs to clear unsupported bits in the termios */ 1071 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1072 1073 if (C_BAUD(tty) == B0) { 1074 newline.dwDTERate = acm->line.dwDTERate; 1075 newctrl &= ~ACM_CTRL_DTR; 1076 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1077 newctrl |= ACM_CTRL_DTR; 1078 } 1079 1080 if (newctrl != acm->ctrlout) 1081 acm_set_control(acm, acm->ctrlout = newctrl); 1082 1083 if (memcmp(&acm->line, &newline, sizeof newline)) { 1084 memcpy(&acm->line, &newline, sizeof newline); 1085 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1086 __func__, 1087 le32_to_cpu(newline.dwDTERate), 1088 newline.bCharFormat, newline.bParityType, 1089 newline.bDataBits); 1090 acm_set_line(acm, &acm->line); 1091 } 1092 } 1093 1094 static const struct tty_port_operations acm_port_ops = { 1095 .dtr_rts = acm_port_dtr_rts, 1096 .shutdown = acm_port_shutdown, 1097 .activate = acm_port_activate, 1098 .destruct = acm_port_destruct, 1099 }; 1100 1101 /* 1102 * USB probe and disconnect routines. 1103 */ 1104 1105 /* Little helpers: write/read buffers free */ 1106 static void acm_write_buffers_free(struct acm *acm) 1107 { 1108 int i; 1109 struct acm_wb *wb; 1110 1111 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1112 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1113 } 1114 1115 static void acm_read_buffers_free(struct acm *acm) 1116 { 1117 int i; 1118 1119 for (i = 0; i < acm->rx_buflimit; i++) 1120 usb_free_coherent(acm->dev, acm->readsize, 1121 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1122 } 1123 1124 /* Little helper: write buffers allocate */ 1125 static int acm_write_buffers_alloc(struct acm *acm) 1126 { 1127 int i; 1128 struct acm_wb *wb; 1129 1130 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1131 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1132 &wb->dmah); 1133 if (!wb->buf) { 1134 while (i != 0) { 1135 --i; 1136 --wb; 1137 usb_free_coherent(acm->dev, acm->writesize, 1138 wb->buf, wb->dmah); 1139 } 1140 return -ENOMEM; 1141 } 1142 } 1143 return 0; 1144 } 1145 1146 static int acm_probe(struct usb_interface *intf, 1147 const struct usb_device_id *id) 1148 { 1149 struct usb_cdc_union_desc *union_header = NULL; 1150 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1151 unsigned char *buffer = intf->altsetting->extra; 1152 int buflen = intf->altsetting->extralen; 1153 struct usb_interface *control_interface; 1154 struct usb_interface *data_interface; 1155 struct usb_endpoint_descriptor *epctrl = NULL; 1156 struct usb_endpoint_descriptor *epread = NULL; 1157 struct usb_endpoint_descriptor *epwrite = NULL; 1158 struct usb_device *usb_dev = interface_to_usbdev(intf); 1159 struct usb_cdc_parsed_header h; 1160 struct acm *acm; 1161 int minor; 1162 int ctrlsize, readsize; 1163 u8 *buf; 1164 int call_intf_num = -1; 1165 int data_intf_num = -1; 1166 unsigned long quirks; 1167 int num_rx_buf; 1168 int i; 1169 int combined_interfaces = 0; 1170 struct device *tty_dev; 1171 int rv = -ENOMEM; 1172 int res; 1173 1174 /* normal quirks */ 1175 quirks = (unsigned long)id->driver_info; 1176 1177 if (quirks == IGNORE_DEVICE) 1178 return -ENODEV; 1179 1180 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1181 1182 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1183 1184 /* handle quirks deadly to normal probing*/ 1185 if (quirks == NO_UNION_NORMAL) { 1186 data_interface = usb_ifnum_to_if(usb_dev, 1); 1187 control_interface = usb_ifnum_to_if(usb_dev, 0); 1188 /* we would crash */ 1189 if (!data_interface || !control_interface) 1190 return -ENODEV; 1191 goto skip_normal_probe; 1192 } 1193 1194 /* normal probing*/ 1195 if (!buffer) { 1196 dev_err(&intf->dev, "Weird descriptor references\n"); 1197 return -EINVAL; 1198 } 1199 1200 if (!buflen) { 1201 if (intf->cur_altsetting->endpoint && 1202 intf->cur_altsetting->endpoint->extralen && 1203 intf->cur_altsetting->endpoint->extra) { 1204 dev_dbg(&intf->dev, 1205 "Seeking extra descriptors on endpoint\n"); 1206 buflen = intf->cur_altsetting->endpoint->extralen; 1207 buffer = intf->cur_altsetting->endpoint->extra; 1208 } else { 1209 dev_err(&intf->dev, 1210 "Zero length descriptor references\n"); 1211 return -EINVAL; 1212 } 1213 } 1214 1215 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1216 union_header = h.usb_cdc_union_desc; 1217 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1218 if (cmgmd) 1219 call_intf_num = cmgmd->bDataInterface; 1220 1221 if (!union_header) { 1222 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1223 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1224 combined_interfaces = 1; 1225 control_interface = data_interface = intf; 1226 goto look_for_collapsed_interface; 1227 } else if (call_intf_num > 0) { 1228 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1229 data_intf_num = call_intf_num; 1230 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1231 control_interface = intf; 1232 } else { 1233 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1234 return -ENODEV; 1235 } 1236 } else { 1237 int class = -1; 1238 1239 data_intf_num = union_header->bSlaveInterface0; 1240 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1241 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1242 1243 if (control_interface) 1244 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1245 1246 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1247 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1248 combined_interfaces = 1; 1249 control_interface = data_interface = intf; 1250 goto look_for_collapsed_interface; 1251 } 1252 } 1253 1254 if (!control_interface || !data_interface) { 1255 dev_dbg(&intf->dev, "no interfaces\n"); 1256 return -ENODEV; 1257 } 1258 1259 if (data_intf_num != call_intf_num) 1260 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1261 1262 if (control_interface == data_interface) { 1263 /* some broken devices designed for windows work this way */ 1264 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1265 combined_interfaces = 1; 1266 /* a popular other OS doesn't use it */ 1267 quirks |= NO_CAP_LINE; 1268 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1269 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1270 return -EINVAL; 1271 } 1272 look_for_collapsed_interface: 1273 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1274 &epread, &epwrite, &epctrl, NULL); 1275 if (res) 1276 return res; 1277 1278 goto made_compressed_probe; 1279 } 1280 1281 skip_normal_probe: 1282 1283 /*workaround for switched interfaces */ 1284 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1285 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1286 dev_dbg(&intf->dev, 1287 "Your device has switched interfaces.\n"); 1288 swap(control_interface, data_interface); 1289 } else { 1290 return -EINVAL; 1291 } 1292 } 1293 1294 /* Accept probe requests only for the control interface */ 1295 if (!combined_interfaces && intf != control_interface) 1296 return -ENODEV; 1297 1298 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1299 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1300 return -EINVAL; 1301 1302 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1303 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1304 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1305 1306 1307 /* workaround for switched endpoints */ 1308 if (!usb_endpoint_dir_in(epread)) { 1309 /* descriptors are swapped */ 1310 dev_dbg(&intf->dev, 1311 "The data interface has switched endpoints\n"); 1312 swap(epread, epwrite); 1313 } 1314 made_compressed_probe: 1315 dev_dbg(&intf->dev, "interfaces are valid\n"); 1316 1317 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1318 if (!acm) 1319 return -ENOMEM; 1320 1321 tty_port_init(&acm->port); 1322 acm->port.ops = &acm_port_ops; 1323 1324 ctrlsize = usb_endpoint_maxp(epctrl); 1325 readsize = usb_endpoint_maxp(epread) * 1326 (quirks == SINGLE_RX_URB ? 1 : 2); 1327 acm->combined_interfaces = combined_interfaces; 1328 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1329 acm->control = control_interface; 1330 acm->data = data_interface; 1331 1332 usb_get_intf(acm->control); /* undone in destruct() */ 1333 1334 minor = acm_alloc_minor(acm); 1335 if (minor < 0) { 1336 acm->minor = ACM_MINOR_INVALID; 1337 goto err_put_port; 1338 } 1339 1340 acm->minor = minor; 1341 acm->dev = usb_dev; 1342 if (h.usb_cdc_acm_descriptor) 1343 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1344 if (quirks & NO_CAP_LINE) 1345 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1346 acm->ctrlsize = ctrlsize; 1347 acm->readsize = readsize; 1348 acm->rx_buflimit = num_rx_buf; 1349 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1350 init_waitqueue_head(&acm->wioctl); 1351 spin_lock_init(&acm->write_lock); 1352 spin_lock_init(&acm->read_lock); 1353 mutex_init(&acm->mutex); 1354 if (usb_endpoint_xfer_int(epread)) { 1355 acm->bInterval = epread->bInterval; 1356 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1357 } else { 1358 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1359 } 1360 if (usb_endpoint_xfer_int(epwrite)) 1361 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1362 else 1363 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1364 init_usb_anchor(&acm->delayed); 1365 acm->quirks = quirks; 1366 1367 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1368 if (!buf) 1369 goto err_put_port; 1370 acm->ctrl_buffer = buf; 1371 1372 if (acm_write_buffers_alloc(acm) < 0) 1373 goto err_free_ctrl_buffer; 1374 1375 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1376 if (!acm->ctrlurb) 1377 goto err_free_write_buffers; 1378 1379 for (i = 0; i < num_rx_buf; i++) { 1380 struct acm_rb *rb = &(acm->read_buffers[i]); 1381 struct urb *urb; 1382 1383 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1384 &rb->dma); 1385 if (!rb->base) 1386 goto err_free_read_urbs; 1387 rb->index = i; 1388 rb->instance = acm; 1389 1390 urb = usb_alloc_urb(0, GFP_KERNEL); 1391 if (!urb) 1392 goto err_free_read_urbs; 1393 1394 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1395 urb->transfer_dma = rb->dma; 1396 if (usb_endpoint_xfer_int(epread)) 1397 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1398 acm->readsize, 1399 acm_read_bulk_callback, rb, 1400 acm->bInterval); 1401 else 1402 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1403 acm->readsize, 1404 acm_read_bulk_callback, rb); 1405 1406 acm->read_urbs[i] = urb; 1407 __set_bit(i, &acm->read_urbs_free); 1408 } 1409 for (i = 0; i < ACM_NW; i++) { 1410 struct acm_wb *snd = &(acm->wb[i]); 1411 1412 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1413 if (!snd->urb) 1414 goto err_free_write_urbs; 1415 1416 if (usb_endpoint_xfer_int(epwrite)) 1417 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1418 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1419 else 1420 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1421 NULL, acm->writesize, acm_write_bulk, snd); 1422 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1423 if (quirks & SEND_ZERO_PACKET) 1424 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1425 snd->instance = acm; 1426 } 1427 1428 usb_set_intfdata(intf, acm); 1429 1430 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1431 if (i < 0) 1432 goto err_free_write_urbs; 1433 1434 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1435 struct usb_cdc_country_functional_desc * cfd = 1436 h.usb_cdc_country_functional_desc; 1437 1438 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1439 if (!acm->country_codes) 1440 goto skip_countries; 1441 acm->country_code_size = cfd->bLength - 4; 1442 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1443 cfd->bLength - 4); 1444 acm->country_rel_date = cfd->iCountryCodeRelDate; 1445 1446 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1447 if (i < 0) { 1448 kfree(acm->country_codes); 1449 acm->country_codes = NULL; 1450 acm->country_code_size = 0; 1451 goto skip_countries; 1452 } 1453 1454 i = device_create_file(&intf->dev, 1455 &dev_attr_iCountryCodeRelDate); 1456 if (i < 0) { 1457 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1458 kfree(acm->country_codes); 1459 acm->country_codes = NULL; 1460 acm->country_code_size = 0; 1461 goto skip_countries; 1462 } 1463 } 1464 1465 skip_countries: 1466 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1467 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1468 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1469 /* works around buggy devices */ 1470 epctrl->bInterval ? epctrl->bInterval : 16); 1471 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1472 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1473 acm->notification_buffer = NULL; 1474 acm->nb_index = 0; 1475 acm->nb_size = 0; 1476 1477 acm->line.dwDTERate = cpu_to_le32(9600); 1478 acm->line.bDataBits = 8; 1479 acm_set_line(acm, &acm->line); 1480 1481 if (!acm->combined_interfaces) { 1482 rv = usb_driver_claim_interface(&acm_driver, data_interface, acm); 1483 if (rv) 1484 goto err_remove_files; 1485 } 1486 1487 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1488 &control_interface->dev); 1489 if (IS_ERR(tty_dev)) { 1490 rv = PTR_ERR(tty_dev); 1491 goto err_release_data_interface; 1492 } 1493 1494 if (quirks & CLEAR_HALT_CONDITIONS) { 1495 usb_clear_halt(usb_dev, acm->in); 1496 usb_clear_halt(usb_dev, acm->out); 1497 } 1498 1499 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1500 1501 return 0; 1502 1503 err_release_data_interface: 1504 if (!acm->combined_interfaces) { 1505 /* Clear driver data so that disconnect() returns early. */ 1506 usb_set_intfdata(data_interface, NULL); 1507 usb_driver_release_interface(&acm_driver, data_interface); 1508 } 1509 err_remove_files: 1510 if (acm->country_codes) { 1511 device_remove_file(&acm->control->dev, 1512 &dev_attr_wCountryCodes); 1513 device_remove_file(&acm->control->dev, 1514 &dev_attr_iCountryCodeRelDate); 1515 } 1516 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1517 err_free_write_urbs: 1518 for (i = 0; i < ACM_NW; i++) 1519 usb_free_urb(acm->wb[i].urb); 1520 err_free_read_urbs: 1521 for (i = 0; i < num_rx_buf; i++) 1522 usb_free_urb(acm->read_urbs[i]); 1523 acm_read_buffers_free(acm); 1524 usb_free_urb(acm->ctrlurb); 1525 err_free_write_buffers: 1526 acm_write_buffers_free(acm); 1527 err_free_ctrl_buffer: 1528 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1529 err_put_port: 1530 tty_port_put(&acm->port); 1531 1532 return rv; 1533 } 1534 1535 static void acm_disconnect(struct usb_interface *intf) 1536 { 1537 struct acm *acm = usb_get_intfdata(intf); 1538 struct tty_struct *tty; 1539 int i; 1540 1541 /* sibling interface is already cleaning up */ 1542 if (!acm) 1543 return; 1544 1545 acm->disconnected = true; 1546 /* 1547 * there is a circular dependency. acm_softint() can resubmit 1548 * the URBs in error handling so we need to block any 1549 * submission right away 1550 */ 1551 acm_poison_urbs(acm); 1552 mutex_lock(&acm->mutex); 1553 if (acm->country_codes) { 1554 device_remove_file(&acm->control->dev, 1555 &dev_attr_wCountryCodes); 1556 device_remove_file(&acm->control->dev, 1557 &dev_attr_iCountryCodeRelDate); 1558 } 1559 wake_up_all(&acm->wioctl); 1560 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1561 usb_set_intfdata(acm->control, NULL); 1562 usb_set_intfdata(acm->data, NULL); 1563 mutex_unlock(&acm->mutex); 1564 1565 tty = tty_port_tty_get(&acm->port); 1566 if (tty) { 1567 tty_vhangup(tty); 1568 tty_kref_put(tty); 1569 } 1570 1571 cancel_delayed_work_sync(&acm->dwork); 1572 1573 tty_unregister_device(acm_tty_driver, acm->minor); 1574 1575 usb_free_urb(acm->ctrlurb); 1576 for (i = 0; i < ACM_NW; i++) 1577 usb_free_urb(acm->wb[i].urb); 1578 for (i = 0; i < acm->rx_buflimit; i++) 1579 usb_free_urb(acm->read_urbs[i]); 1580 acm_write_buffers_free(acm); 1581 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1582 acm_read_buffers_free(acm); 1583 1584 kfree(acm->notification_buffer); 1585 1586 if (!acm->combined_interfaces) 1587 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1588 acm->data : acm->control); 1589 1590 tty_port_put(&acm->port); 1591 } 1592 1593 #ifdef CONFIG_PM 1594 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1595 { 1596 struct acm *acm = usb_get_intfdata(intf); 1597 int cnt; 1598 1599 spin_lock_irq(&acm->write_lock); 1600 if (PMSG_IS_AUTO(message)) { 1601 if (acm->transmitting) { 1602 spin_unlock_irq(&acm->write_lock); 1603 return -EBUSY; 1604 } 1605 } 1606 cnt = acm->susp_count++; 1607 spin_unlock_irq(&acm->write_lock); 1608 1609 if (cnt) 1610 return 0; 1611 1612 acm_poison_urbs(acm); 1613 cancel_delayed_work_sync(&acm->dwork); 1614 acm->urbs_in_error_delay = 0; 1615 1616 return 0; 1617 } 1618 1619 static int acm_resume(struct usb_interface *intf) 1620 { 1621 struct acm *acm = usb_get_intfdata(intf); 1622 struct urb *urb; 1623 int rv = 0; 1624 1625 spin_lock_irq(&acm->write_lock); 1626 1627 if (--acm->susp_count) 1628 goto out; 1629 1630 acm_unpoison_urbs(acm); 1631 1632 if (tty_port_initialized(&acm->port)) { 1633 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1634 1635 for (;;) { 1636 urb = usb_get_from_anchor(&acm->delayed); 1637 if (!urb) 1638 break; 1639 1640 acm_start_wb(acm, urb->context); 1641 } 1642 1643 /* 1644 * delayed error checking because we must 1645 * do the write path at all cost 1646 */ 1647 if (rv < 0) 1648 goto out; 1649 1650 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1651 } 1652 out: 1653 spin_unlock_irq(&acm->write_lock); 1654 1655 return rv; 1656 } 1657 1658 static int acm_reset_resume(struct usb_interface *intf) 1659 { 1660 struct acm *acm = usb_get_intfdata(intf); 1661 1662 if (tty_port_initialized(&acm->port)) 1663 tty_port_tty_hangup(&acm->port, false); 1664 1665 return acm_resume(intf); 1666 } 1667 1668 #endif /* CONFIG_PM */ 1669 1670 static int acm_pre_reset(struct usb_interface *intf) 1671 { 1672 struct acm *acm = usb_get_intfdata(intf); 1673 1674 clear_bit(EVENT_RX_STALL, &acm->flags); 1675 acm->nb_index = 0; /* pending control transfers are lost */ 1676 1677 return 0; 1678 } 1679 1680 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1681 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1682 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1683 USB_CDC_ACM_PROTO_VENDOR) 1684 1685 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1686 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1687 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1688 USB_CDC_ACM_PROTO_VENDOR) 1689 1690 /* 1691 * USB driver structure. 1692 */ 1693 1694 static const struct usb_device_id acm_ids[] = { 1695 /* quirky and broken devices */ 1696 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1697 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1698 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1699 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1700 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1701 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1702 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1703 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1704 }, 1705 { USB_DEVICE(0x045b, 0x023c), /* Renesas USB Download mode */ 1706 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1707 }, 1708 { USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */ 1709 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1710 }, 1711 { USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */ 1712 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1713 }, 1714 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1715 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1716 }, 1717 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1718 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1719 }, 1720 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1721 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1722 }, 1723 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1724 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1725 }, 1726 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1727 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1728 }, 1729 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1730 .driver_info = SINGLE_RX_URB, 1731 }, 1732 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1733 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1734 }, 1735 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1736 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1737 }, 1738 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1739 .driver_info = SINGLE_RX_URB, 1740 }, 1741 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1742 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1743 }, 1744 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1745 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1746 }, 1747 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1748 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1749 }, 1750 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1751 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1752 }, 1753 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1754 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1755 }, 1756 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1757 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1758 }, 1759 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1760 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1761 }, 1762 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1763 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1764 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1765 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1766 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1767 }, 1768 /* Motorola H24 HSPA module: */ 1769 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1770 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1771 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1772 }, 1773 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1774 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1775 }, 1776 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1777 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1778 }, 1779 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1780 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1781 }, 1782 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1783 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1784 }, 1785 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1786 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1787 }, 1788 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1789 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1790 }, 1791 1792 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1793 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1794 data interface instead of 1795 communications interface. 1796 Maybe we should define a new 1797 quirk for this. */ 1798 }, 1799 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1800 .driver_info = NO_UNION_NORMAL, 1801 }, 1802 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1803 .driver_info = NO_UNION_NORMAL, 1804 }, 1805 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1806 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1807 }, 1808 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1809 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1810 }, 1811 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1812 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1813 }, 1814 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1815 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1816 }, 1817 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1818 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1819 }, 1820 1821 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1822 .driver_info = CLEAR_HALT_CONDITIONS, 1823 }, 1824 1825 /* Nokia S60 phones expose two ACM channels. The first is 1826 * a modem and is picked up by the standard AT-command 1827 * information below. The second is 'vendor-specific' but 1828 * is treated as a serial device at the S60 end, so we want 1829 * to expose it on Linux too. */ 1830 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1886 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1887 1888 /* Support for Owen devices */ 1889 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1890 1891 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1892 1893 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1894 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1895 .driver_info = IGNORE_DEVICE, 1896 }, 1897 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1898 .driver_info = IGNORE_DEVICE, 1899 }, 1900 #endif 1901 1902 #if IS_ENABLED(CONFIG_IR_TOY) 1903 { USB_DEVICE(0x04d8, 0xfd08), 1904 .driver_info = IGNORE_DEVICE, 1905 }, 1906 1907 { USB_DEVICE(0x04d8, 0xf58b), 1908 .driver_info = IGNORE_DEVICE, 1909 }, 1910 #endif 1911 1912 #if IS_ENABLED(CONFIG_USB_SERIAL_XR) 1913 { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE }, 1914 { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE }, 1915 { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE }, 1916 { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE }, 1917 { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE }, 1918 { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE }, 1919 { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE }, 1920 { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE }, 1921 { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE }, 1922 { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE }, 1923 { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE }, 1924 #endif 1925 1926 /*Samsung phone in firmware update mode */ 1927 { USB_DEVICE(0x04e8, 0x685d), 1928 .driver_info = IGNORE_DEVICE, 1929 }, 1930 1931 /* Exclude Infineon Flash Loader utility */ 1932 { USB_DEVICE(0x058b, 0x0041), 1933 .driver_info = IGNORE_DEVICE, 1934 }, 1935 1936 /* Exclude ETAS ES58x */ 1937 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 1938 .driver_info = IGNORE_DEVICE, 1939 }, 1940 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 1941 .driver_info = IGNORE_DEVICE, 1942 }, 1943 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 1944 .driver_info = IGNORE_DEVICE, 1945 }, 1946 1947 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1948 .driver_info = SEND_ZERO_PACKET, 1949 }, 1950 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1951 .driver_info = SEND_ZERO_PACKET, 1952 }, 1953 1954 /* Exclude Goodix Fingerprint Reader */ 1955 { USB_DEVICE(0x27c6, 0x5395), 1956 .driver_info = IGNORE_DEVICE, 1957 }, 1958 1959 /* Exclude Heimann Sensor GmbH USB appset demo */ 1960 { USB_DEVICE(0x32a7, 0x0000), 1961 .driver_info = IGNORE_DEVICE, 1962 }, 1963 1964 /* control interfaces without any protocol set */ 1965 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1966 USB_CDC_PROTO_NONE) }, 1967 1968 /* control interfaces with various AT-command sets */ 1969 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1970 USB_CDC_ACM_PROTO_AT_V25TER) }, 1971 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1972 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1973 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1974 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1975 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1976 USB_CDC_ACM_PROTO_AT_GSM) }, 1977 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1978 USB_CDC_ACM_PROTO_AT_3G) }, 1979 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1980 USB_CDC_ACM_PROTO_AT_CDMA) }, 1981 1982 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1983 .driver_info = SEND_ZERO_PACKET, 1984 }, 1985 1986 { } 1987 }; 1988 1989 MODULE_DEVICE_TABLE(usb, acm_ids); 1990 1991 static struct usb_driver acm_driver = { 1992 .name = "cdc_acm", 1993 .probe = acm_probe, 1994 .disconnect = acm_disconnect, 1995 #ifdef CONFIG_PM 1996 .suspend = acm_suspend, 1997 .resume = acm_resume, 1998 .reset_resume = acm_reset_resume, 1999 #endif 2000 .pre_reset = acm_pre_reset, 2001 .id_table = acm_ids, 2002 #ifdef CONFIG_PM 2003 .supports_autosuspend = 1, 2004 #endif 2005 .disable_hub_initiated_lpm = 1, 2006 }; 2007 2008 /* 2009 * TTY driver structures. 2010 */ 2011 2012 static const struct tty_operations acm_ops = { 2013 .install = acm_tty_install, 2014 .open = acm_tty_open, 2015 .close = acm_tty_close, 2016 .cleanup = acm_tty_cleanup, 2017 .hangup = acm_tty_hangup, 2018 .write = acm_tty_write, 2019 .write_room = acm_tty_write_room, 2020 .ioctl = acm_tty_ioctl, 2021 .throttle = acm_tty_throttle, 2022 .unthrottle = acm_tty_unthrottle, 2023 .chars_in_buffer = acm_tty_chars_in_buffer, 2024 .break_ctl = acm_tty_break_ctl, 2025 .set_termios = acm_tty_set_termios, 2026 .tiocmget = acm_tty_tiocmget, 2027 .tiocmset = acm_tty_tiocmset, 2028 .get_serial = get_serial_info, 2029 .set_serial = set_serial_info, 2030 .get_icount = acm_tty_get_icount, 2031 }; 2032 2033 /* 2034 * Init / exit. 2035 */ 2036 2037 static int __init acm_init(void) 2038 { 2039 int retval; 2040 acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW | 2041 TTY_DRIVER_DYNAMIC_DEV); 2042 if (IS_ERR(acm_tty_driver)) 2043 return PTR_ERR(acm_tty_driver); 2044 acm_tty_driver->driver_name = "acm", 2045 acm_tty_driver->name = "ttyACM", 2046 acm_tty_driver->major = ACM_TTY_MAJOR, 2047 acm_tty_driver->minor_start = 0, 2048 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2049 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2050 acm_tty_driver->init_termios = tty_std_termios; 2051 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2052 HUPCL | CLOCAL; 2053 tty_set_operations(acm_tty_driver, &acm_ops); 2054 2055 retval = tty_register_driver(acm_tty_driver); 2056 if (retval) { 2057 tty_driver_kref_put(acm_tty_driver); 2058 return retval; 2059 } 2060 2061 retval = usb_register(&acm_driver); 2062 if (retval) { 2063 tty_unregister_driver(acm_tty_driver); 2064 tty_driver_kref_put(acm_tty_driver); 2065 return retval; 2066 } 2067 2068 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2069 2070 return 0; 2071 } 2072 2073 static void __exit acm_exit(void) 2074 { 2075 usb_deregister(&acm_driver); 2076 tty_unregister_driver(acm_tty_driver); 2077 tty_driver_kref_put(acm_tty_driver); 2078 idr_destroy(&acm_minors); 2079 } 2080 2081 module_init(acm_init); 2082 module_exit(acm_exit); 2083 2084 MODULE_AUTHOR(DRIVER_AUTHOR); 2085 MODULE_DESCRIPTION(DRIVER_DESC); 2086 MODULE_LICENSE("GPL"); 2087 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2088