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/tty_ldisc.h> 32 #include <linux/module.h> 33 #include <linux/mutex.h> 34 #include <linux/uaccess.h> 35 #include <linux/usb.h> 36 #include <linux/usb/cdc.h> 37 #include <asm/byteorder.h> 38 #include <linux/unaligned.h> 39 #include <linux/idr.h> 40 #include <linux/list.h> 41 42 #include "cdc-acm.h" 43 44 45 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 46 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 47 48 static struct usb_driver acm_driver; 49 static struct tty_driver *acm_tty_driver; 50 51 static DEFINE_IDR(acm_minors); 52 static DEFINE_MUTEX(acm_minors_lock); 53 54 static void acm_tty_set_termios(struct tty_struct *tty, 55 const struct ktermios *termios_old); 56 57 /* 58 * acm_minors accessors 59 */ 60 61 /* 62 * Look up an ACM structure by minor. If found and not disconnected, increment 63 * its refcount and return it with its mutex held. 64 */ 65 static struct acm *acm_get_by_minor(unsigned int minor) 66 { 67 struct acm *acm; 68 69 mutex_lock(&acm_minors_lock); 70 acm = idr_find(&acm_minors, minor); 71 if (acm) { 72 mutex_lock(&acm->mutex); 73 if (acm->disconnected) { 74 mutex_unlock(&acm->mutex); 75 acm = NULL; 76 } else { 77 tty_port_get(&acm->port); 78 mutex_unlock(&acm->mutex); 79 } 80 } 81 mutex_unlock(&acm_minors_lock); 82 return acm; 83 } 84 85 /* 86 * Try to find an available minor number and if found, associate it with 'acm'. 87 */ 88 static int acm_alloc_minor(struct acm *acm) 89 { 90 int minor; 91 92 mutex_lock(&acm_minors_lock); 93 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 94 mutex_unlock(&acm_minors_lock); 95 96 return minor; 97 } 98 99 /* Release the minor number associated with 'acm'. */ 100 static void acm_release_minor(struct acm *acm) 101 { 102 mutex_lock(&acm_minors_lock); 103 idr_remove(&acm_minors, acm->minor); 104 mutex_unlock(&acm_minors_lock); 105 } 106 107 /* 108 * Functions for ACM control messages. 109 */ 110 111 static int acm_ctrl_msg(struct acm *acm, int request, int value, 112 void *buf, int len) 113 { 114 int retval; 115 116 retval = usb_autopm_get_interface(acm->control); 117 if (retval) 118 return retval; 119 120 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 121 request, USB_RT_ACM, value, 122 acm->control->altsetting[0].desc.bInterfaceNumber, 123 buf, len, USB_CTRL_SET_TIMEOUT); 124 125 dev_dbg(&acm->control->dev, 126 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 127 __func__, request, value, len, retval); 128 129 usb_autopm_put_interface(acm->control); 130 131 return retval < 0 ? retval : 0; 132 } 133 134 /* devices aren't required to support these requests. 135 * the cdc acm descriptor tells whether they do... 136 */ 137 static inline int acm_set_control(struct acm *acm, int control) 138 { 139 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 140 return -EOPNOTSUPP; 141 142 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 143 control, NULL, 0); 144 } 145 146 #define acm_set_line(acm, line) \ 147 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 148 #define acm_send_break(acm, ms) \ 149 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 150 151 static void acm_poison_urbs(struct acm *acm) 152 { 153 int i; 154 155 usb_poison_urb(acm->ctrlurb); 156 for (i = 0; i < ACM_NW; i++) 157 usb_poison_urb(acm->wb[i].urb); 158 for (i = 0; i < acm->rx_buflimit; i++) 159 usb_poison_urb(acm->read_urbs[i]); 160 } 161 162 static void acm_unpoison_urbs(struct acm *acm) 163 { 164 int i; 165 166 for (i = 0; i < acm->rx_buflimit; i++) 167 usb_unpoison_urb(acm->read_urbs[i]); 168 for (i = 0; i < ACM_NW; i++) 169 usb_unpoison_urb(acm->wb[i].urb); 170 usb_unpoison_urb(acm->ctrlurb); 171 } 172 173 174 /* 175 * Write buffer management. 176 * All of these assume proper locks taken by the caller. 177 */ 178 179 static int acm_wb_alloc(struct acm *acm) 180 { 181 int i, wbn; 182 struct acm_wb *wb; 183 184 wbn = 0; 185 i = 0; 186 for (;;) { 187 wb = &acm->wb[wbn]; 188 if (!wb->use) { 189 wb->use = true; 190 wb->len = 0; 191 return wbn; 192 } 193 wbn = (wbn + 1) % ACM_NW; 194 if (++i >= ACM_NW) 195 return -1; 196 } 197 } 198 199 static int acm_wb_is_avail(struct acm *acm) 200 { 201 int i, n; 202 unsigned long flags; 203 204 n = ACM_NW; 205 spin_lock_irqsave(&acm->write_lock, flags); 206 for (i = 0; i < ACM_NW; i++) 207 if(acm->wb[i].use) 208 n--; 209 spin_unlock_irqrestore(&acm->write_lock, flags); 210 return n; 211 } 212 213 /* 214 * Finish write. Caller must hold acm->write_lock 215 */ 216 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 217 { 218 wb->use = false; 219 acm->transmitting--; 220 usb_autopm_put_interface_async(acm->control); 221 } 222 223 /* 224 * Poke write. 225 * 226 * the caller is responsible for locking 227 */ 228 229 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 230 { 231 int rc; 232 233 acm->transmitting++; 234 235 wb->urb->transfer_buffer = wb->buf; 236 wb->urb->transfer_dma = wb->dmah; 237 wb->urb->transfer_buffer_length = wb->len; 238 wb->urb->dev = acm->dev; 239 240 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 241 if (rc < 0) { 242 if (rc != -EPERM) 243 dev_err(&acm->data->dev, 244 "%s - usb_submit_urb(write bulk) failed: %d\n", 245 __func__, rc); 246 acm_write_done(acm, wb); 247 } 248 return rc; 249 } 250 251 /* 252 * attributes exported through sysfs 253 */ 254 static ssize_t bmCapabilities_show 255 (struct device *dev, struct device_attribute *attr, char *buf) 256 { 257 struct usb_interface *intf = to_usb_interface(dev); 258 struct acm *acm = usb_get_intfdata(intf); 259 260 return sprintf(buf, "%d", acm->ctrl_caps); 261 } 262 static DEVICE_ATTR_RO(bmCapabilities); 263 264 static ssize_t wCountryCodes_show 265 (struct device *dev, struct device_attribute *attr, char *buf) 266 { 267 struct usb_interface *intf = to_usb_interface(dev); 268 struct acm *acm = usb_get_intfdata(intf); 269 270 memcpy(buf, acm->country_codes, acm->country_code_size); 271 return acm->country_code_size; 272 } 273 274 static DEVICE_ATTR_RO(wCountryCodes); 275 276 static ssize_t iCountryCodeRelDate_show 277 (struct device *dev, struct device_attribute *attr, char *buf) 278 { 279 struct usb_interface *intf = to_usb_interface(dev); 280 struct acm *acm = usb_get_intfdata(intf); 281 282 return sprintf(buf, "%d", acm->country_rel_date); 283 } 284 285 static DEVICE_ATTR_RO(iCountryCodeRelDate); 286 /* 287 * Interrupt handlers for various ACM device responses 288 */ 289 290 static void acm_process_notification(struct acm *acm, unsigned char *buf) 291 { 292 int newctrl; 293 int difference; 294 unsigned long flags; 295 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 296 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 297 298 switch (dr->bNotificationType) { 299 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 300 dev_dbg(&acm->control->dev, 301 "%s - network connection: %d\n", __func__, dr->wValue); 302 break; 303 304 case USB_CDC_NOTIFY_SERIAL_STATE: 305 if (le16_to_cpu(dr->wLength) != 2) { 306 dev_dbg(&acm->control->dev, 307 "%s - malformed serial state\n", __func__); 308 break; 309 } 310 311 newctrl = get_unaligned_le16(data); 312 dev_dbg(&acm->control->dev, 313 "%s - serial state: 0x%x\n", __func__, newctrl); 314 315 if (!acm->clocal && (acm->ctrlin & ~newctrl & USB_CDC_SERIAL_STATE_DCD)) { 316 dev_dbg(&acm->control->dev, 317 "%s - calling hangup\n", __func__); 318 tty_port_tty_hangup(&acm->port, false); 319 } 320 321 difference = acm->ctrlin ^ newctrl; 322 323 if ((difference & USB_CDC_SERIAL_STATE_DCD) && acm->port.tty) { 324 struct tty_ldisc *ld = tty_ldisc_ref(acm->port.tty); 325 if (ld) { 326 if (ld->ops->dcd_change) 327 ld->ops->dcd_change(acm->port.tty, newctrl & USB_CDC_SERIAL_STATE_DCD); 328 tty_ldisc_deref(ld); 329 } 330 } 331 332 spin_lock_irqsave(&acm->read_lock, flags); 333 acm->ctrlin = newctrl; 334 acm->oldcount = acm->iocount; 335 336 if (difference & USB_CDC_SERIAL_STATE_DSR) 337 acm->iocount.dsr++; 338 if (difference & USB_CDC_SERIAL_STATE_DCD) 339 acm->iocount.dcd++; 340 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) { 341 acm->iocount.brk++; 342 tty_insert_flip_char(&acm->port, 0, TTY_BREAK); 343 } 344 if (newctrl & USB_CDC_SERIAL_STATE_RING_SIGNAL) 345 acm->iocount.rng++; 346 if (newctrl & USB_CDC_SERIAL_STATE_FRAMING) 347 acm->iocount.frame++; 348 if (newctrl & USB_CDC_SERIAL_STATE_PARITY) 349 acm->iocount.parity++; 350 if (newctrl & USB_CDC_SERIAL_STATE_OVERRUN) 351 acm->iocount.overrun++; 352 spin_unlock_irqrestore(&acm->read_lock, flags); 353 354 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) 355 tty_flip_buffer_push(&acm->port); 356 357 if (difference) 358 wake_up_all(&acm->wioctl); 359 360 break; 361 362 default: 363 dev_dbg(&acm->control->dev, 364 "%s - unknown notification %d received: index %d len %d\n", 365 __func__, 366 dr->bNotificationType, dr->wIndex, dr->wLength); 367 } 368 } 369 370 /* control interface reports status changes with "interrupt" transfers */ 371 static void acm_ctrl_irq(struct urb *urb) 372 { 373 struct acm *acm = urb->context; 374 struct usb_cdc_notification *dr; 375 unsigned int current_size = urb->actual_length; 376 unsigned int expected_size, copy_size, alloc_size; 377 int retval; 378 int status = urb->status; 379 380 switch (status) { 381 case 0: 382 /* success */ 383 break; 384 case -ECONNRESET: 385 case -ENOENT: 386 case -ESHUTDOWN: 387 /* this urb is terminated, clean up */ 388 dev_dbg(&acm->control->dev, 389 "%s - urb shutting down with status: %d\n", 390 __func__, status); 391 return; 392 default: 393 dev_dbg(&acm->control->dev, 394 "%s - nonzero urb status received: %d\n", 395 __func__, status); 396 goto exit; 397 } 398 399 usb_mark_last_busy(acm->dev); 400 401 if (acm->nb_index == 0) { 402 /* 403 * The first chunk of a message must contain at least the 404 * notification header with the length field, otherwise we 405 * can't get an expected_size. 406 */ 407 if (current_size < sizeof(struct usb_cdc_notification)) { 408 dev_dbg(&acm->control->dev, "urb too short\n"); 409 goto exit; 410 } 411 dr = urb->transfer_buffer; 412 } else { 413 dr = (struct usb_cdc_notification *)acm->notification_buffer; 414 } 415 /* size = notification-header + (optional) data */ 416 expected_size = sizeof(struct usb_cdc_notification) + 417 le16_to_cpu(dr->wLength); 418 419 if (acm->nb_index != 0 || current_size < expected_size) { 420 /* notification is transmitted fragmented, reassemble */ 421 if (acm->nb_size < expected_size) { 422 u8 *new_buffer; 423 alloc_size = roundup_pow_of_two(expected_size); 424 /* Final freeing is done on disconnect. */ 425 new_buffer = krealloc(acm->notification_buffer, 426 alloc_size, GFP_ATOMIC); 427 if (!new_buffer) { 428 acm->nb_index = 0; 429 goto exit; 430 } 431 432 acm->notification_buffer = new_buffer; 433 acm->nb_size = alloc_size; 434 dr = (struct usb_cdc_notification *)acm->notification_buffer; 435 } 436 437 copy_size = min(current_size, 438 expected_size - acm->nb_index); 439 440 memcpy(&acm->notification_buffer[acm->nb_index], 441 urb->transfer_buffer, copy_size); 442 acm->nb_index += copy_size; 443 current_size = acm->nb_index; 444 } 445 446 if (current_size >= expected_size) { 447 /* notification complete */ 448 acm_process_notification(acm, (unsigned char *)dr); 449 acm->nb_index = 0; 450 } 451 452 exit: 453 retval = usb_submit_urb(urb, GFP_ATOMIC); 454 if (retval && retval != -EPERM && retval != -ENODEV) 455 dev_err(&acm->control->dev, 456 "%s - usb_submit_urb failed: %d\n", __func__, retval); 457 else 458 dev_vdbg(&acm->control->dev, 459 "control resubmission terminated %d\n", retval); 460 } 461 462 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 463 { 464 int res; 465 466 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 467 return 0; 468 469 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 470 if (res) { 471 if (res != -EPERM && res != -ENODEV) { 472 dev_err(&acm->data->dev, 473 "urb %d failed submission with %d\n", 474 index, res); 475 } else { 476 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 477 } 478 set_bit(index, &acm->read_urbs_free); 479 return res; 480 } else { 481 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 482 } 483 484 return 0; 485 } 486 487 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 488 { 489 int res; 490 int i; 491 492 for (i = 0; i < acm->rx_buflimit; ++i) { 493 res = acm_submit_read_urb(acm, i, mem_flags); 494 if (res) 495 return res; 496 } 497 498 return 0; 499 } 500 501 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 502 { 503 unsigned long flags; 504 505 if (!urb->actual_length) 506 return; 507 508 spin_lock_irqsave(&acm->read_lock, flags); 509 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 510 urb->actual_length); 511 spin_unlock_irqrestore(&acm->read_lock, flags); 512 513 tty_flip_buffer_push(&acm->port); 514 } 515 516 static void acm_read_bulk_callback(struct urb *urb) 517 { 518 struct acm_rb *rb = urb->context; 519 struct acm *acm = rb->instance; 520 int status = urb->status; 521 bool stopped = false; 522 bool stalled = false; 523 bool cooldown = false; 524 525 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 526 rb->index, urb->actual_length, status); 527 528 switch (status) { 529 case 0: 530 usb_mark_last_busy(acm->dev); 531 acm_process_read_urb(acm, urb); 532 break; 533 case -EPIPE: 534 set_bit(EVENT_RX_STALL, &acm->flags); 535 stalled = true; 536 break; 537 case -ENOENT: 538 case -ECONNRESET: 539 case -ESHUTDOWN: 540 dev_dbg(&acm->data->dev, 541 "%s - urb shutting down with status: %d\n", 542 __func__, status); 543 stopped = true; 544 break; 545 case -EOVERFLOW: 546 case -EPROTO: 547 dev_dbg(&acm->data->dev, 548 "%s - cooling babbling device\n", __func__); 549 usb_mark_last_busy(acm->dev); 550 set_bit(rb->index, &acm->urbs_in_error_delay); 551 set_bit(ACM_ERROR_DELAY, &acm->flags); 552 cooldown = true; 553 break; 554 default: 555 dev_dbg(&acm->data->dev, 556 "%s - nonzero urb status received: %d\n", 557 __func__, status); 558 break; 559 } 560 561 /* 562 * Make sure URB processing is done before marking as free to avoid 563 * racing with unthrottle() on another CPU. Matches the barriers 564 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 565 */ 566 smp_mb__before_atomic(); 567 set_bit(rb->index, &acm->read_urbs_free); 568 /* 569 * Make sure URB is marked as free before checking the throttled flag 570 * to avoid racing with unthrottle() on another CPU. Matches the 571 * smp_mb() in unthrottle(). 572 */ 573 smp_mb__after_atomic(); 574 575 if (stopped || stalled || cooldown) { 576 if (stalled) 577 schedule_delayed_work(&acm->dwork, 0); 578 else if (cooldown) 579 schedule_delayed_work(&acm->dwork, HZ / 2); 580 return; 581 } 582 583 if (test_bit(ACM_THROTTLED, &acm->flags)) 584 return; 585 586 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 587 } 588 589 /* data interface wrote those outgoing bytes */ 590 static void acm_write_bulk(struct urb *urb) 591 { 592 struct acm_wb *wb = urb->context; 593 struct acm *acm = wb->instance; 594 unsigned long flags; 595 int status = urb->status; 596 597 if (status || (urb->actual_length != urb->transfer_buffer_length)) 598 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 599 urb->actual_length, 600 urb->transfer_buffer_length, 601 status); 602 603 spin_lock_irqsave(&acm->write_lock, flags); 604 acm_write_done(acm, wb); 605 spin_unlock_irqrestore(&acm->write_lock, flags); 606 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 607 schedule_delayed_work(&acm->dwork, 0); 608 } 609 610 static void acm_softint(struct work_struct *work) 611 { 612 int i; 613 struct acm *acm = container_of(work, struct acm, dwork.work); 614 615 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 616 smp_mb(); /* against acm_suspend() */ 617 if (!acm->susp_count) { 618 for (i = 0; i < acm->rx_buflimit; i++) 619 usb_kill_urb(acm->read_urbs[i]); 620 usb_clear_halt(acm->dev, acm->in); 621 acm_submit_read_urbs(acm, GFP_KERNEL); 622 clear_bit(EVENT_RX_STALL, &acm->flags); 623 } 624 } 625 626 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 627 for (i = 0; i < acm->rx_buflimit; i++) 628 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 629 acm_submit_read_urb(acm, i, GFP_KERNEL); 630 } 631 632 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 633 tty_port_tty_wakeup(&acm->port); 634 } 635 636 /* 637 * TTY handlers 638 */ 639 640 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 641 { 642 struct acm *acm; 643 int retval; 644 645 acm = acm_get_by_minor(tty->index); 646 if (!acm) 647 return -ENODEV; 648 649 retval = tty_standard_install(driver, tty); 650 if (retval) 651 goto error_init_termios; 652 653 /* 654 * Suppress initial echoing for some devices which might send data 655 * immediately after acm driver has been installed. 656 */ 657 if (acm->quirks & DISABLE_ECHO) 658 tty->termios.c_lflag &= ~ECHO; 659 660 tty->driver_data = acm; 661 662 return 0; 663 664 error_init_termios: 665 tty_port_put(&acm->port); 666 return retval; 667 } 668 669 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 670 { 671 struct acm *acm = tty->driver_data; 672 673 return tty_port_open(&acm->port, tty, filp); 674 } 675 676 static void acm_port_dtr_rts(struct tty_port *port, bool active) 677 { 678 struct acm *acm = container_of(port, struct acm, port); 679 int val; 680 int res; 681 682 if (active) 683 val = USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS; 684 else 685 val = 0; 686 687 /* FIXME: add missing ctrlout locking throughout driver */ 688 acm->ctrlout = val; 689 690 res = acm_set_control(acm, val); 691 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 692 /* This is broken in too many devices to spam the logs */ 693 dev_dbg(&acm->control->dev, "failed to set dtr/rts\n"); 694 } 695 696 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 697 { 698 struct acm *acm = container_of(port, struct acm, port); 699 int retval = -ENODEV; 700 int i; 701 702 mutex_lock(&acm->mutex); 703 if (acm->disconnected) 704 goto disconnected; 705 706 retval = usb_autopm_get_interface(acm->control); 707 if (retval) 708 goto error_get_interface; 709 710 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 711 acm->control->needs_remote_wakeup = 1; 712 713 if (!(acm->quirks & ALWAYS_POLL_CTRL)) { 714 acm->ctrlurb->dev = acm->dev; 715 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 716 if (retval) { 717 dev_err(&acm->control->dev, 718 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 719 goto error_submit_urb; 720 } 721 } 722 723 acm_tty_set_termios(tty, NULL); 724 725 /* 726 * Unthrottle device in case the TTY was closed while throttled. 727 */ 728 clear_bit(ACM_THROTTLED, &acm->flags); 729 730 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 731 if (retval) 732 goto error_submit_read_urbs; 733 734 usb_autopm_put_interface(acm->control); 735 736 mutex_unlock(&acm->mutex); 737 738 return 0; 739 740 error_submit_read_urbs: 741 for (i = 0; i < acm->rx_buflimit; i++) 742 usb_kill_urb(acm->read_urbs[i]); 743 usb_kill_urb(acm->ctrlurb); 744 error_submit_urb: 745 usb_autopm_put_interface(acm->control); 746 error_get_interface: 747 disconnected: 748 mutex_unlock(&acm->mutex); 749 750 return usb_translate_errors(retval); 751 } 752 753 static void acm_port_destruct(struct tty_port *port) 754 { 755 struct acm *acm = container_of(port, struct acm, port); 756 757 if (acm->minor != ACM_MINOR_INVALID) 758 acm_release_minor(acm); 759 usb_put_intf(acm->control); 760 kfree(acm->country_codes); 761 kfree(acm); 762 } 763 764 static void acm_port_shutdown(struct tty_port *port) 765 { 766 struct acm *acm = container_of(port, struct acm, port); 767 struct urb *urb; 768 struct acm_wb *wb; 769 770 /* 771 * Need to grab write_lock to prevent race with resume, but no need to 772 * hold it due to the tty-port initialised flag. 773 */ 774 acm_poison_urbs(acm); 775 spin_lock_irq(&acm->write_lock); 776 spin_unlock_irq(&acm->write_lock); 777 778 usb_autopm_get_interface_no_resume(acm->control); 779 acm->control->needs_remote_wakeup = 0; 780 usb_autopm_put_interface(acm->control); 781 782 for (;;) { 783 urb = usb_get_from_anchor(&acm->delayed); 784 if (!urb) 785 break; 786 wb = urb->context; 787 wb->use = false; 788 usb_autopm_put_interface_async(acm->control); 789 } 790 791 acm_unpoison_urbs(acm); 792 793 if (acm->quirks & ALWAYS_POLL_CTRL) { 794 acm->ctrlurb->dev = acm->dev; 795 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) 796 dev_dbg(&acm->control->dev, 797 "ctrl polling restart failed after port close\n"); 798 /* port_shutdown() cleared DTR/RTS; restore them */ 799 acm_set_control(acm, USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS); 800 } 801 } 802 803 static void acm_tty_cleanup(struct tty_struct *tty) 804 { 805 struct acm *acm = tty->driver_data; 806 807 tty_port_put(&acm->port); 808 } 809 810 static void acm_tty_hangup(struct tty_struct *tty) 811 { 812 struct acm *acm = tty->driver_data; 813 814 tty_port_hangup(&acm->port); 815 } 816 817 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 818 { 819 struct acm *acm = tty->driver_data; 820 821 tty_port_close(&acm->port, tty, filp); 822 } 823 824 static ssize_t acm_tty_write(struct tty_struct *tty, const u8 *buf, 825 size_t count) 826 { 827 struct acm *acm = tty->driver_data; 828 int stat; 829 unsigned long flags; 830 int wbn; 831 struct acm_wb *wb; 832 833 if (!count) 834 return 0; 835 836 dev_vdbg(&acm->data->dev, "%zu bytes from tty layer\n", count); 837 838 spin_lock_irqsave(&acm->write_lock, flags); 839 wbn = acm_wb_alloc(acm); 840 if (wbn < 0) { 841 spin_unlock_irqrestore(&acm->write_lock, flags); 842 return 0; 843 } 844 wb = &acm->wb[wbn]; 845 846 if (!acm->dev) { 847 wb->use = false; 848 spin_unlock_irqrestore(&acm->write_lock, flags); 849 return -ENODEV; 850 } 851 852 count = (count > acm->writesize) ? acm->writesize : count; 853 dev_vdbg(&acm->data->dev, "writing %zu bytes\n", count); 854 memcpy(wb->buf, buf, count); 855 wb->len = count; 856 857 stat = usb_autopm_get_interface_async(acm->control); 858 if (stat) { 859 wb->use = false; 860 spin_unlock_irqrestore(&acm->write_lock, flags); 861 return stat; 862 } 863 864 if (acm->susp_count) { 865 usb_anchor_urb(wb->urb, &acm->delayed); 866 spin_unlock_irqrestore(&acm->write_lock, flags); 867 return count; 868 } 869 870 stat = acm_start_wb(acm, wb); 871 spin_unlock_irqrestore(&acm->write_lock, flags); 872 873 if (stat < 0) 874 return stat; 875 return count; 876 } 877 878 static unsigned int acm_tty_write_room(struct tty_struct *tty) 879 { 880 struct acm *acm = tty->driver_data; 881 /* 882 * Do not let the line discipline to know that we have a reserve, 883 * or it might get too enthusiastic. 884 */ 885 return acm_wb_is_avail(acm) ? acm->writesize : 0; 886 } 887 888 static void acm_tty_flush_buffer(struct tty_struct *tty) 889 { 890 struct acm *acm = tty->driver_data; 891 unsigned long flags; 892 int i; 893 894 spin_lock_irqsave(&acm->write_lock, flags); 895 for (i = 0; i < ACM_NW; i++) 896 if (acm->wb[i].use) 897 usb_unlink_urb(acm->wb[i].urb); 898 spin_unlock_irqrestore(&acm->write_lock, flags); 899 } 900 901 static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty) 902 { 903 struct acm *acm = tty->driver_data; 904 /* 905 * if the device was unplugged then any remaining characters fell out 906 * of the connector ;) 907 */ 908 if (acm->disconnected) 909 return 0; 910 /* 911 * This is inaccurate (overcounts), but it works. 912 */ 913 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 914 } 915 916 static void acm_tty_throttle(struct tty_struct *tty) 917 { 918 struct acm *acm = tty->driver_data; 919 920 set_bit(ACM_THROTTLED, &acm->flags); 921 } 922 923 static void acm_tty_unthrottle(struct tty_struct *tty) 924 { 925 struct acm *acm = tty->driver_data; 926 927 clear_bit(ACM_THROTTLED, &acm->flags); 928 929 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 930 smp_mb(); 931 932 acm_submit_read_urbs(acm, GFP_KERNEL); 933 } 934 935 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 936 { 937 struct acm *acm = tty->driver_data; 938 int retval; 939 940 if (!(acm->ctrl_caps & USB_CDC_CAP_BRK)) 941 return -EOPNOTSUPP; 942 943 retval = acm_send_break(acm, state ? 0xffff : 0); 944 if (retval < 0) 945 dev_dbg(&acm->control->dev, 946 "%s - send break failed\n", __func__); 947 return retval; 948 } 949 950 static int acm_tty_tiocmget(struct tty_struct *tty) 951 { 952 struct acm *acm = tty->driver_data; 953 954 return (acm->ctrlout & USB_CDC_CTRL_DTR ? TIOCM_DTR : 0) | 955 (acm->ctrlout & USB_CDC_CTRL_RTS ? TIOCM_RTS : 0) | 956 (acm->ctrlin & USB_CDC_SERIAL_STATE_DSR ? TIOCM_DSR : 0) | 957 (acm->ctrlin & USB_CDC_SERIAL_STATE_RING_SIGNAL ? TIOCM_RI : 0) | 958 (acm->ctrlin & USB_CDC_SERIAL_STATE_DCD ? TIOCM_CD : 0) | 959 TIOCM_CTS; 960 } 961 962 static int acm_tty_tiocmset(struct tty_struct *tty, 963 unsigned int set, unsigned int clear) 964 { 965 struct acm *acm = tty->driver_data; 966 unsigned int newctrl; 967 968 newctrl = acm->ctrlout; 969 set = (set & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 970 (set & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 971 clear = (clear & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 972 (clear & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 973 974 newctrl = (newctrl & ~clear) | set; 975 976 if (acm->ctrlout == newctrl) 977 return 0; 978 return acm_set_control(acm, acm->ctrlout = newctrl); 979 } 980 981 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 982 { 983 struct acm *acm = tty->driver_data; 984 985 ss->line = acm->minor; 986 mutex_lock(&acm->port.mutex); 987 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 988 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 989 ASYNC_CLOSING_WAIT_NONE : 990 jiffies_to_msecs(acm->port.closing_wait) / 10; 991 mutex_unlock(&acm->port.mutex); 992 return 0; 993 } 994 995 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 996 { 997 struct acm *acm = tty->driver_data; 998 unsigned int closing_wait, close_delay; 999 int retval = 0; 1000 1001 close_delay = msecs_to_jiffies(ss->close_delay * 10); 1002 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 1003 ASYNC_CLOSING_WAIT_NONE : 1004 msecs_to_jiffies(ss->closing_wait * 10); 1005 1006 mutex_lock(&acm->port.mutex); 1007 1008 if (!capable(CAP_SYS_ADMIN)) { 1009 if ((close_delay != acm->port.close_delay) || 1010 (closing_wait != acm->port.closing_wait)) 1011 retval = -EPERM; 1012 } else { 1013 acm->port.close_delay = close_delay; 1014 acm->port.closing_wait = closing_wait; 1015 } 1016 1017 mutex_unlock(&acm->port.mutex); 1018 return retval; 1019 } 1020 1021 static int wait_serial_change(struct acm *acm, unsigned long arg) 1022 { 1023 int rv = 0; 1024 DECLARE_WAITQUEUE(wait, current); 1025 struct async_icount old, new; 1026 1027 do { 1028 spin_lock_irq(&acm->read_lock); 1029 old = acm->oldcount; 1030 new = acm->iocount; 1031 acm->oldcount = new; 1032 spin_unlock_irq(&acm->read_lock); 1033 1034 if ((arg & TIOCM_DSR) && 1035 old.dsr != new.dsr) 1036 break; 1037 if ((arg & TIOCM_CD) && 1038 old.dcd != new.dcd) 1039 break; 1040 if ((arg & TIOCM_RI) && 1041 old.rng != new.rng) 1042 break; 1043 1044 add_wait_queue(&acm->wioctl, &wait); 1045 set_current_state(TASK_INTERRUPTIBLE); 1046 schedule(); 1047 remove_wait_queue(&acm->wioctl, &wait); 1048 if (acm->disconnected) { 1049 if (arg & TIOCM_CD) 1050 break; 1051 else 1052 rv = -ENODEV; 1053 } else { 1054 if (signal_pending(current)) 1055 rv = -ERESTARTSYS; 1056 } 1057 } while (!rv); 1058 1059 1060 1061 return rv; 1062 } 1063 1064 static int acm_tty_get_icount(struct tty_struct *tty, 1065 struct serial_icounter_struct *icount) 1066 { 1067 struct acm *acm = tty->driver_data; 1068 1069 icount->dsr = acm->iocount.dsr; 1070 icount->rng = acm->iocount.rng; 1071 icount->dcd = acm->iocount.dcd; 1072 icount->frame = acm->iocount.frame; 1073 icount->overrun = acm->iocount.overrun; 1074 icount->parity = acm->iocount.parity; 1075 icount->brk = acm->iocount.brk; 1076 1077 return 0; 1078 } 1079 1080 static int acm_tty_ioctl(struct tty_struct *tty, 1081 unsigned int cmd, unsigned long arg) 1082 { 1083 struct acm *acm = tty->driver_data; 1084 int rv = -ENOIOCTLCMD; 1085 1086 switch (cmd) { 1087 case TIOCMIWAIT: 1088 rv = usb_autopm_get_interface(acm->control); 1089 if (rv < 0) { 1090 rv = -EIO; 1091 break; 1092 } 1093 rv = wait_serial_change(acm, arg); 1094 usb_autopm_put_interface(acm->control); 1095 break; 1096 } 1097 1098 return rv; 1099 } 1100 1101 static void acm_tty_set_termios(struct tty_struct *tty, 1102 const struct ktermios *termios_old) 1103 { 1104 struct acm *acm = tty->driver_data; 1105 struct ktermios *termios = &tty->termios; 1106 struct usb_cdc_line_coding newline; 1107 int newctrl = acm->ctrlout; 1108 1109 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1110 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1111 newline.bParityType = termios->c_cflag & PARENB ? 1112 (termios->c_cflag & PARODD ? 1 : 2) + 1113 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1114 newline.bDataBits = tty_get_char_size(termios->c_cflag); 1115 1116 /* FIXME: Needs to clear unsupported bits in the termios */ 1117 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1118 1119 if (C_BAUD(tty) == B0) { 1120 newline.dwDTERate = acm->line.dwDTERate; 1121 newctrl &= ~USB_CDC_CTRL_DTR; 1122 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1123 newctrl |= USB_CDC_CTRL_DTR; 1124 } 1125 1126 if (newctrl != acm->ctrlout) 1127 acm_set_control(acm, acm->ctrlout = newctrl); 1128 1129 if (memcmp(&acm->line, &newline, sizeof newline)) { 1130 memcpy(&acm->line, &newline, sizeof newline); 1131 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1132 __func__, 1133 le32_to_cpu(newline.dwDTERate), 1134 newline.bCharFormat, newline.bParityType, 1135 newline.bDataBits); 1136 acm_set_line(acm, &acm->line); 1137 } 1138 } 1139 1140 static const struct tty_port_operations acm_port_ops = { 1141 .dtr_rts = acm_port_dtr_rts, 1142 .shutdown = acm_port_shutdown, 1143 .activate = acm_port_activate, 1144 .destruct = acm_port_destruct, 1145 }; 1146 1147 /* 1148 * USB probe and disconnect routines. 1149 */ 1150 1151 /* Little helpers: write/read buffers free */ 1152 static void acm_write_buffers_free(struct acm *acm) 1153 { 1154 int i; 1155 struct acm_wb *wb; 1156 1157 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1158 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1159 } 1160 1161 static void acm_read_buffers_free(struct acm *acm) 1162 { 1163 int i; 1164 1165 for (i = 0; i < acm->rx_buflimit; i++) 1166 usb_free_coherent(acm->dev, acm->readsize, 1167 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1168 } 1169 1170 /* Little helper: write buffers allocate */ 1171 static int acm_write_buffers_alloc(struct acm *acm) 1172 { 1173 int i; 1174 struct acm_wb *wb; 1175 1176 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1177 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1178 &wb->dmah); 1179 if (!wb->buf) { 1180 while (i != 0) { 1181 --i; 1182 --wb; 1183 usb_free_coherent(acm->dev, acm->writesize, 1184 wb->buf, wb->dmah); 1185 } 1186 return -ENOMEM; 1187 } 1188 } 1189 return 0; 1190 } 1191 1192 static int acm_probe(struct usb_interface *intf, 1193 const struct usb_device_id *id) 1194 { 1195 struct usb_cdc_union_desc *union_header = NULL; 1196 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1197 unsigned char *buffer = intf->altsetting->extra; 1198 int buflen = intf->altsetting->extralen; 1199 struct usb_interface *control_interface; 1200 struct usb_interface *data_interface; 1201 struct usb_endpoint_descriptor *epctrl = NULL; 1202 struct usb_endpoint_descriptor *epread = NULL; 1203 struct usb_endpoint_descriptor *epwrite = NULL; 1204 struct usb_device *usb_dev = interface_to_usbdev(intf); 1205 struct usb_cdc_parsed_header h; 1206 struct acm *acm; 1207 int minor; 1208 int ctrlsize, readsize; 1209 u8 *buf; 1210 int call_intf_num = -1; 1211 int data_intf_num = -1; 1212 unsigned long quirks; 1213 int num_rx_buf; 1214 int i; 1215 int combined_interfaces = 0; 1216 struct device *tty_dev; 1217 int rv = -ENOMEM; 1218 int res; 1219 1220 /* normal quirks */ 1221 quirks = (unsigned long)id->driver_info; 1222 1223 if (quirks == IGNORE_DEVICE) 1224 return -ENODEV; 1225 1226 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1227 1228 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1229 1230 /* handle quirks deadly to normal probing*/ 1231 if (quirks == NO_UNION_NORMAL) { 1232 data_interface = usb_ifnum_to_if(usb_dev, 1); 1233 control_interface = usb_ifnum_to_if(usb_dev, 0); 1234 /* we would crash */ 1235 if (!data_interface || !control_interface) 1236 return -ENODEV; 1237 goto skip_normal_probe; 1238 } else if (quirks == NO_UNION_12) { 1239 data_interface = usb_ifnum_to_if(usb_dev, 2); 1240 control_interface = usb_ifnum_to_if(usb_dev, 1); 1241 if (!data_interface || !control_interface) 1242 return -ENODEV; 1243 goto skip_normal_probe; 1244 } 1245 1246 /* normal probing*/ 1247 if (!buffer) { 1248 dev_err(&intf->dev, "Weird descriptor references\n"); 1249 return -EINVAL; 1250 } 1251 1252 if (!buflen) { 1253 if (intf->cur_altsetting->endpoint && 1254 intf->cur_altsetting->endpoint->extralen && 1255 intf->cur_altsetting->endpoint->extra) { 1256 dev_dbg(&intf->dev, 1257 "Seeking extra descriptors on endpoint\n"); 1258 buflen = intf->cur_altsetting->endpoint->extralen; 1259 buffer = intf->cur_altsetting->endpoint->extra; 1260 } else { 1261 dev_err(&intf->dev, 1262 "Zero length descriptor references\n"); 1263 return -EINVAL; 1264 } 1265 } 1266 1267 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1268 union_header = h.usb_cdc_union_desc; 1269 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1270 if (cmgmd) 1271 call_intf_num = cmgmd->bDataInterface; 1272 1273 if (!union_header) { 1274 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1275 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1276 combined_interfaces = 1; 1277 control_interface = data_interface = intf; 1278 goto look_for_collapsed_interface; 1279 } else if (call_intf_num > 0) { 1280 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1281 data_intf_num = call_intf_num; 1282 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1283 control_interface = intf; 1284 } else { 1285 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1286 return -ENODEV; 1287 } 1288 } else { 1289 int class = -1; 1290 1291 data_intf_num = union_header->bSlaveInterface0; 1292 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1293 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1294 1295 if (control_interface) 1296 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1297 1298 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1299 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1300 combined_interfaces = 1; 1301 control_interface = data_interface = intf; 1302 goto look_for_collapsed_interface; 1303 } 1304 } 1305 1306 if (!control_interface || !data_interface) { 1307 dev_dbg(&intf->dev, "no interfaces\n"); 1308 return -ENODEV; 1309 } 1310 1311 if (data_intf_num != call_intf_num) 1312 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1313 1314 if (control_interface == data_interface) { 1315 /* some broken devices designed for windows work this way */ 1316 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1317 combined_interfaces = 1; 1318 /* a popular other OS doesn't use it */ 1319 quirks |= NO_CAP_LINE; 1320 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1321 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1322 return -EINVAL; 1323 } 1324 look_for_collapsed_interface: 1325 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1326 &epread, &epwrite, &epctrl, NULL); 1327 if (res) 1328 return res; 1329 1330 goto made_compressed_probe; 1331 } 1332 1333 skip_normal_probe: 1334 1335 /*workaround for switched interfaces */ 1336 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1337 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1338 dev_dbg(&intf->dev, 1339 "Your device has switched interfaces.\n"); 1340 swap(control_interface, data_interface); 1341 } else if (quirks & VENDOR_CLASS_DATA_IFACE) { 1342 dev_dbg(&intf->dev, 1343 "Vendor-specific data interface class, continuing.\n"); 1344 } else { 1345 return -EINVAL; 1346 } 1347 } 1348 1349 /* Accept probe requests only for the control interface */ 1350 if (!combined_interfaces && intf != control_interface) 1351 return -ENODEV; 1352 1353 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1354 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1355 return -EINVAL; 1356 1357 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1358 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1359 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1360 1361 1362 /* workaround for switched endpoints */ 1363 if (!usb_endpoint_dir_in(epread)) { 1364 /* descriptors are swapped */ 1365 dev_dbg(&intf->dev, 1366 "The data interface has switched endpoints\n"); 1367 swap(epread, epwrite); 1368 } 1369 made_compressed_probe: 1370 dev_dbg(&intf->dev, "interfaces are valid\n"); 1371 1372 acm = kzalloc_obj(struct acm); 1373 if (!acm) 1374 return -ENOMEM; 1375 1376 tty_port_init(&acm->port); 1377 acm->port.ops = &acm_port_ops; 1378 1379 ctrlsize = usb_endpoint_maxp(epctrl); 1380 readsize = usb_endpoint_maxp(epread) * 1381 (quirks == SINGLE_RX_URB ? 1 : 2); 1382 acm->combined_interfaces = combined_interfaces; 1383 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1384 acm->control = control_interface; 1385 acm->data = data_interface; 1386 1387 usb_get_intf(acm->control); /* undone in destruct() */ 1388 1389 minor = acm_alloc_minor(acm); 1390 if (minor < 0) { 1391 acm->minor = ACM_MINOR_INVALID; 1392 goto err_put_port; 1393 } 1394 1395 acm->minor = minor; 1396 acm->dev = usb_dev; 1397 if (h.usb_cdc_acm_descriptor) 1398 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1399 if (quirks & NO_CAP_LINE) 1400 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1401 if (quirks & MISSING_CAP_BRK) 1402 acm->ctrl_caps |= USB_CDC_CAP_BRK; 1403 acm->ctrlsize = ctrlsize; 1404 acm->readsize = readsize; 1405 acm->rx_buflimit = num_rx_buf; 1406 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1407 init_waitqueue_head(&acm->wioctl); 1408 spin_lock_init(&acm->write_lock); 1409 spin_lock_init(&acm->read_lock); 1410 mutex_init(&acm->mutex); 1411 if (usb_endpoint_xfer_int(epread)) { 1412 acm->bInterval = epread->bInterval; 1413 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1414 } else { 1415 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1416 } 1417 if (usb_endpoint_xfer_int(epwrite)) 1418 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1419 else 1420 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1421 init_usb_anchor(&acm->delayed); 1422 acm->quirks = quirks; 1423 1424 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1425 if (!buf) 1426 goto err_put_port; 1427 acm->ctrl_buffer = buf; 1428 1429 if (acm_write_buffers_alloc(acm) < 0) 1430 goto err_free_ctrl_buffer; 1431 1432 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1433 if (!acm->ctrlurb) 1434 goto err_free_write_buffers; 1435 1436 for (i = 0; i < num_rx_buf; i++) { 1437 struct acm_rb *rb = &(acm->read_buffers[i]); 1438 struct urb *urb; 1439 1440 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1441 &rb->dma); 1442 if (!rb->base) 1443 goto err_free_read_urbs; 1444 rb->index = i; 1445 rb->instance = acm; 1446 1447 urb = usb_alloc_urb(0, GFP_KERNEL); 1448 if (!urb) 1449 goto err_free_read_urbs; 1450 1451 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1452 urb->transfer_dma = rb->dma; 1453 if (usb_endpoint_xfer_int(epread)) 1454 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1455 acm->readsize, 1456 acm_read_bulk_callback, rb, 1457 acm->bInterval); 1458 else 1459 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1460 acm->readsize, 1461 acm_read_bulk_callback, rb); 1462 1463 acm->read_urbs[i] = urb; 1464 __set_bit(i, &acm->read_urbs_free); 1465 } 1466 for (i = 0; i < ACM_NW; i++) { 1467 struct acm_wb *snd = &(acm->wb[i]); 1468 1469 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1470 if (!snd->urb) 1471 goto err_free_write_urbs; 1472 1473 if (usb_endpoint_xfer_int(epwrite)) 1474 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1475 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1476 else 1477 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1478 NULL, acm->writesize, acm_write_bulk, snd); 1479 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1480 if (quirks & SEND_ZERO_PACKET) 1481 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1482 snd->instance = acm; 1483 } 1484 1485 usb_set_intfdata(intf, acm); 1486 1487 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1488 if (i < 0) 1489 goto err_free_write_urbs; 1490 1491 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1492 struct usb_cdc_country_functional_desc * cfd = 1493 h.usb_cdc_country_functional_desc; 1494 1495 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1496 if (!acm->country_codes) 1497 goto skip_countries; 1498 acm->country_code_size = cfd->bLength - 4; 1499 memcpy(acm->country_codes, cfd->wCountryCodes, 1500 cfd->bLength - 4); 1501 acm->country_rel_date = cfd->iCountryCodeRelDate; 1502 1503 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1504 if (i < 0) { 1505 kfree(acm->country_codes); 1506 acm->country_codes = NULL; 1507 acm->country_code_size = 0; 1508 goto skip_countries; 1509 } 1510 1511 i = device_create_file(&intf->dev, 1512 &dev_attr_iCountryCodeRelDate); 1513 if (i < 0) { 1514 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1515 kfree(acm->country_codes); 1516 acm->country_codes = NULL; 1517 acm->country_code_size = 0; 1518 goto skip_countries; 1519 } 1520 } 1521 1522 skip_countries: 1523 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1524 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1525 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1526 /* works around buggy devices */ 1527 epctrl->bInterval ? epctrl->bInterval : 16); 1528 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1529 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1530 acm->notification_buffer = NULL; 1531 acm->nb_index = 0; 1532 acm->nb_size = 0; 1533 1534 acm->line.dwDTERate = cpu_to_le32(9600); 1535 acm->line.bDataBits = 8; 1536 acm_set_line(acm, &acm->line); 1537 1538 if (quirks & ALWAYS_POLL_CTRL) 1539 acm_set_control(acm, USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS); 1540 1541 if (!acm->combined_interfaces) { 1542 rv = usb_driver_claim_interface(&acm_driver, data_interface, acm); 1543 if (rv) 1544 goto err_remove_files; 1545 } 1546 1547 if (quirks & CLEAR_HALT_CONDITIONS) { 1548 /* errors intentionally ignored */ 1549 usb_clear_halt(usb_dev, acm->in); 1550 usb_clear_halt(usb_dev, acm->out); 1551 } 1552 1553 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1554 &control_interface->dev); 1555 if (IS_ERR(tty_dev)) { 1556 rv = PTR_ERR(tty_dev); 1557 goto err_release_data_interface; 1558 } 1559 1560 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1561 1562 if (acm->quirks & ALWAYS_POLL_CTRL) { 1563 acm->ctrlurb->dev = acm->dev; 1564 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) 1565 dev_warn(&intf->dev, 1566 "failed to start persistent ctrl polling\n"); 1567 } 1568 1569 return 0; 1570 1571 err_release_data_interface: 1572 if (!acm->combined_interfaces) { 1573 /* Clear driver data so that disconnect() returns early. */ 1574 usb_set_intfdata(data_interface, NULL); 1575 usb_driver_release_interface(&acm_driver, data_interface); 1576 } 1577 err_remove_files: 1578 if (acm->country_codes) { 1579 device_remove_file(&acm->control->dev, 1580 &dev_attr_wCountryCodes); 1581 device_remove_file(&acm->control->dev, 1582 &dev_attr_iCountryCodeRelDate); 1583 } 1584 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1585 err_free_write_urbs: 1586 for (i = 0; i < ACM_NW; i++) 1587 usb_free_urb(acm->wb[i].urb); 1588 err_free_read_urbs: 1589 for (i = 0; i < num_rx_buf; i++) 1590 usb_free_urb(acm->read_urbs[i]); 1591 acm_read_buffers_free(acm); 1592 usb_free_urb(acm->ctrlurb); 1593 err_free_write_buffers: 1594 acm_write_buffers_free(acm); 1595 err_free_ctrl_buffer: 1596 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1597 err_put_port: 1598 tty_port_put(&acm->port); 1599 1600 return rv; 1601 } 1602 1603 static void acm_disconnect(struct usb_interface *intf) 1604 { 1605 struct acm *acm = usb_get_intfdata(intf); 1606 int i; 1607 1608 /* sibling interface is already cleaning up */ 1609 if (!acm) 1610 return; 1611 1612 acm->disconnected = true; 1613 /* 1614 * there is a circular dependency. acm_softint() can resubmit 1615 * the URBs in error handling so we need to block any 1616 * submission right away 1617 */ 1618 acm_poison_urbs(acm); 1619 mutex_lock(&acm->mutex); 1620 if (acm->country_codes) { 1621 device_remove_file(&acm->control->dev, 1622 &dev_attr_wCountryCodes); 1623 device_remove_file(&acm->control->dev, 1624 &dev_attr_iCountryCodeRelDate); 1625 } 1626 wake_up_all(&acm->wioctl); 1627 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1628 usb_set_intfdata(acm->control, NULL); 1629 usb_set_intfdata(acm->data, NULL); 1630 mutex_unlock(&acm->mutex); 1631 1632 tty_port_tty_vhangup(&acm->port); 1633 1634 cancel_delayed_work_sync(&acm->dwork); 1635 1636 tty_unregister_device(acm_tty_driver, acm->minor); 1637 1638 usb_free_urb(acm->ctrlurb); 1639 for (i = 0; i < ACM_NW; i++) 1640 usb_free_urb(acm->wb[i].urb); 1641 for (i = 0; i < acm->rx_buflimit; i++) 1642 usb_free_urb(acm->read_urbs[i]); 1643 acm_write_buffers_free(acm); 1644 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1645 acm_read_buffers_free(acm); 1646 1647 kfree(acm->notification_buffer); 1648 1649 if (!acm->combined_interfaces) 1650 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1651 acm->data : acm->control); 1652 1653 tty_port_put(&acm->port); 1654 } 1655 1656 #ifdef CONFIG_PM 1657 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1658 { 1659 struct acm *acm = usb_get_intfdata(intf); 1660 int cnt; 1661 1662 spin_lock_irq(&acm->write_lock); 1663 if (PMSG_IS_AUTO(message)) { 1664 if (acm->transmitting) { 1665 spin_unlock_irq(&acm->write_lock); 1666 return -EBUSY; 1667 } 1668 } 1669 cnt = acm->susp_count++; 1670 spin_unlock_irq(&acm->write_lock); 1671 1672 if (cnt) 1673 return 0; 1674 1675 acm_poison_urbs(acm); 1676 cancel_delayed_work_sync(&acm->dwork); 1677 acm->urbs_in_error_delay = 0; 1678 1679 return 0; 1680 } 1681 1682 static int acm_resume(struct usb_interface *intf) 1683 { 1684 struct acm *acm = usb_get_intfdata(intf); 1685 struct urb *urb; 1686 int rv = 0; 1687 1688 spin_lock_irq(&acm->write_lock); 1689 1690 if (--acm->susp_count) 1691 goto out; 1692 1693 acm_unpoison_urbs(acm); 1694 1695 if (tty_port_initialized(&acm->port) || (acm->quirks & ALWAYS_POLL_CTRL)) { 1696 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1697 1698 for (;;) { 1699 urb = usb_get_from_anchor(&acm->delayed); 1700 if (!urb) 1701 break; 1702 1703 acm_start_wb(acm, urb->context); 1704 } 1705 1706 /* 1707 * delayed error checking because we must 1708 * do the write path at all cost 1709 */ 1710 if (rv < 0) 1711 goto out; 1712 1713 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1714 } 1715 out: 1716 spin_unlock_irq(&acm->write_lock); 1717 1718 return rv; 1719 } 1720 1721 static int acm_reset_resume(struct usb_interface *intf) 1722 { 1723 struct acm *acm = usb_get_intfdata(intf); 1724 1725 if (tty_port_initialized(&acm->port)) 1726 tty_port_tty_hangup(&acm->port, false); 1727 1728 return acm_resume(intf); 1729 } 1730 1731 #endif /* CONFIG_PM */ 1732 1733 static int acm_pre_reset(struct usb_interface *intf) 1734 { 1735 struct acm *acm = usb_get_intfdata(intf); 1736 1737 clear_bit(EVENT_RX_STALL, &acm->flags); 1738 acm->nb_index = 0; /* pending control transfers are lost */ 1739 1740 return 0; 1741 } 1742 1743 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1744 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1745 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1746 USB_CDC_ACM_PROTO_VENDOR) 1747 1748 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1749 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1750 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1751 USB_CDC_ACM_PROTO_VENDOR) 1752 1753 /* 1754 * USB driver structure. 1755 */ 1756 1757 static const struct usb_device_id acm_ids[] = { 1758 /* quirky and broken devices */ 1759 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1760 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1761 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1762 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1763 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1764 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1765 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1766 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1767 }, 1768 { USB_DEVICE(0x045b, 0x023c), /* Renesas R-Car H3 USB Download mode */ 1769 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1770 }, 1771 { USB_DEVICE(0x045b, 0x0247), /* Renesas R-Car D3 USB Download mode */ 1772 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1773 }, 1774 { USB_DEVICE(0x045b, 0x0248), /* Renesas R-Car M3-N USB Download mode */ 1775 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1776 }, 1777 { USB_DEVICE(0x045b, 0x024D), /* Renesas R-Car E3 USB Download mode */ 1778 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1779 }, 1780 { USB_DEVICE(0x04b8, 0x0d12), /* EPSON HMD Com&Sens */ 1781 .driver_info = NO_UNION_12, /* union descriptor is garbage */ 1782 }, 1783 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1784 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1785 }, 1786 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1787 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1788 }, 1789 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1790 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1791 }, 1792 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1793 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1794 }, 1795 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1796 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1797 }, 1798 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1799 .driver_info = SINGLE_RX_URB, 1800 }, 1801 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1802 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1803 }, 1804 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1805 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1806 }, 1807 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1808 .driver_info = SINGLE_RX_URB, 1809 }, 1810 { USB_DEVICE(0x1901, 0x0006), /* GE Healthcare Patient Monitor UI Controller */ 1811 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1812 }, 1813 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1814 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1815 }, 1816 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1817 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1818 }, 1819 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1820 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1821 }, 1822 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1823 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1824 }, 1825 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1826 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1827 }, 1828 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1829 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1830 }, 1831 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1832 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1833 }, 1834 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1835 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1836 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1837 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1838 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1839 }, 1840 /* Motorola H24 HSPA module: */ 1841 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1842 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1843 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1844 }, 1845 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1846 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1847 }, 1848 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1849 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1850 }, 1851 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1852 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1853 }, 1854 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1855 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1856 }, 1857 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1858 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1859 }, 1860 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1861 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1862 }, 1863 1864 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1865 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1866 data interface instead of 1867 communications interface. 1868 Maybe we should define a new 1869 quirk for this. */ 1870 }, 1871 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1872 .driver_info = NO_UNION_NORMAL, 1873 }, 1874 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1875 .driver_info = NO_UNION_NORMAL, 1876 }, 1877 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1878 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1879 }, 1880 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1881 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1882 }, 1883 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1884 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1885 }, 1886 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1887 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1888 }, 1889 { USB_DEVICE(0x0c26, 0x0020), /* Icom ICF3400 Serie */ 1890 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1891 }, 1892 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1893 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1894 }, 1895 1896 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1897 .driver_info = CLEAR_HALT_CONDITIONS, 1898 }, 1899 1900 /* Nokia S60 phones expose two ACM channels. The first is 1901 * a modem and is picked up by the standard AT-command 1902 * information below. The second is 'vendor-specific' but 1903 * is treated as a serial device at the S60 end, so we want 1904 * to expose it on Linux too. */ 1905 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1906 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1907 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1908 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1909 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1910 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1911 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1912 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1913 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1914 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1915 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1916 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1917 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1918 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1919 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1920 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1921 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1922 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1923 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1924 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1925 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1926 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1927 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1928 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1929 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1930 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1931 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1932 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1933 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1934 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1935 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1936 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1937 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1938 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1939 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1940 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1941 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1942 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1943 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1944 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1945 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1946 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1947 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1948 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1949 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1950 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1951 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1952 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1953 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1954 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1955 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1956 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1957 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1958 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1959 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1960 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1961 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1962 1963 /* Support for Owen devices */ 1964 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1965 1966 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1967 1968 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1969 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1970 .driver_info = IGNORE_DEVICE, 1971 }, 1972 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1973 .driver_info = IGNORE_DEVICE, 1974 }, 1975 #endif 1976 1977 #if IS_ENABLED(CONFIG_IR_TOY) 1978 { USB_DEVICE(0x04d8, 0xfd08), 1979 .driver_info = IGNORE_DEVICE, 1980 }, 1981 1982 { USB_DEVICE(0x04d8, 0xf58b), 1983 .driver_info = IGNORE_DEVICE, 1984 }, 1985 #endif 1986 1987 #if IS_ENABLED(CONFIG_USB_SERIAL_XR) 1988 { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE }, 1989 { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE }, 1990 { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE }, 1991 { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE }, 1992 { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE }, 1993 { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE }, 1994 { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE }, 1995 { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE }, 1996 { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE }, 1997 { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE }, 1998 { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE }, 1999 #endif 2000 2001 /*Samsung phone in firmware update mode */ 2002 { USB_DEVICE(0x04e8, 0x685d), 2003 .driver_info = IGNORE_DEVICE, 2004 }, 2005 2006 /* Exclude Infineon Flash Loader utility */ 2007 { USB_DEVICE(0x058b, 0x0041), 2008 .driver_info = IGNORE_DEVICE, 2009 }, 2010 2011 /* Exclude ETAS ES58x */ 2012 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 2013 .driver_info = IGNORE_DEVICE, 2014 }, 2015 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 2016 .driver_info = IGNORE_DEVICE, 2017 }, 2018 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 2019 .driver_info = IGNORE_DEVICE, 2020 }, 2021 2022 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 2023 .driver_info = SEND_ZERO_PACKET, 2024 }, 2025 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 2026 .driver_info = SEND_ZERO_PACKET, 2027 }, 2028 2029 /* Exclude Goodix Fingerprint Reader */ 2030 { USB_DEVICE(0x27c6, 0x5395), 2031 .driver_info = IGNORE_DEVICE, 2032 }, 2033 2034 /* Exclude Heimann Sensor GmbH USB appset demo */ 2035 { USB_DEVICE(0x32a7, 0x0000), 2036 .driver_info = IGNORE_DEVICE, 2037 }, 2038 2039 /* CH343 supports CAP_BRK, but doesn't advertise it */ 2040 { USB_DEVICE(0x1a86, 0x55d3), .driver_info = MISSING_CAP_BRK, }, 2041 2042 /* 2043 * Lenovo Yoga Book 9 14IAH10 (83KJ) — INGENIC 17EF:6161 touchscreen 2044 * composite device. The CDC ACM control interface (0) uses a standard 2045 * Union descriptor, but the data interface (1) is declared as vendor- 2046 * specific class (0xff) with no CDC data descriptors, so cdc-acm would 2047 * normally reject it. The firmware also requires continuous polling of 2048 * the notification endpoint (EP 0x82) to suppress a 20-second watchdog 2049 * reset; ALWAYS_POLL_CTRL keeps the ctrlurb active even when no TTY is 2050 * open. Match only the control interface by class to avoid probing the 2051 * vendor-specific data interface. 2052 */ 2053 { USB_DEVICE_INTERFACE_CLASS(0x17ef, 0x6161, USB_CLASS_COMM), 2054 .driver_info = VENDOR_CLASS_DATA_IFACE | ALWAYS_POLL_CTRL }, 2055 2056 /* control interfaces without any protocol set */ 2057 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2058 USB_CDC_PROTO_NONE) }, 2059 2060 /* control interfaces with various AT-command sets */ 2061 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2062 USB_CDC_ACM_PROTO_AT_V25TER) }, 2063 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2064 USB_CDC_ACM_PROTO_AT_PCCA101) }, 2065 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2066 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 2067 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2068 USB_CDC_ACM_PROTO_AT_GSM) }, 2069 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2070 USB_CDC_ACM_PROTO_AT_3G) }, 2071 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2072 USB_CDC_ACM_PROTO_AT_CDMA) }, 2073 2074 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 2075 .driver_info = SEND_ZERO_PACKET, 2076 }, 2077 2078 { } 2079 }; 2080 2081 MODULE_DEVICE_TABLE(usb, acm_ids); 2082 2083 static struct usb_driver acm_driver = { 2084 .name = "cdc_acm", 2085 .probe = acm_probe, 2086 .disconnect = acm_disconnect, 2087 #ifdef CONFIG_PM 2088 .suspend = acm_suspend, 2089 .resume = acm_resume, 2090 .reset_resume = acm_reset_resume, 2091 #endif 2092 .pre_reset = acm_pre_reset, 2093 .id_table = acm_ids, 2094 #ifdef CONFIG_PM 2095 .supports_autosuspend = 1, 2096 #endif 2097 .disable_hub_initiated_lpm = 1, 2098 }; 2099 2100 /* 2101 * TTY driver structures. 2102 */ 2103 2104 static const struct tty_operations acm_ops = { 2105 .install = acm_tty_install, 2106 .open = acm_tty_open, 2107 .close = acm_tty_close, 2108 .cleanup = acm_tty_cleanup, 2109 .hangup = acm_tty_hangup, 2110 .write = acm_tty_write, 2111 .write_room = acm_tty_write_room, 2112 .flush_buffer = acm_tty_flush_buffer, 2113 .ioctl = acm_tty_ioctl, 2114 .throttle = acm_tty_throttle, 2115 .unthrottle = acm_tty_unthrottle, 2116 .chars_in_buffer = acm_tty_chars_in_buffer, 2117 .break_ctl = acm_tty_break_ctl, 2118 .set_termios = acm_tty_set_termios, 2119 .tiocmget = acm_tty_tiocmget, 2120 .tiocmset = acm_tty_tiocmset, 2121 .get_serial = get_serial_info, 2122 .set_serial = set_serial_info, 2123 .get_icount = acm_tty_get_icount, 2124 }; 2125 2126 /* 2127 * Init / exit. 2128 */ 2129 2130 static int __init acm_init(void) 2131 { 2132 int retval; 2133 acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW | 2134 TTY_DRIVER_DYNAMIC_DEV); 2135 if (IS_ERR(acm_tty_driver)) 2136 return PTR_ERR(acm_tty_driver); 2137 acm_tty_driver->driver_name = "acm", 2138 acm_tty_driver->name = "ttyACM", 2139 acm_tty_driver->major = ACM_TTY_MAJOR, 2140 acm_tty_driver->minor_start = 0, 2141 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2142 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2143 acm_tty_driver->init_termios = tty_std_termios; 2144 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2145 HUPCL | CLOCAL; 2146 tty_set_operations(acm_tty_driver, &acm_ops); 2147 2148 retval = tty_register_driver(acm_tty_driver); 2149 if (retval) { 2150 tty_driver_kref_put(acm_tty_driver); 2151 return retval; 2152 } 2153 2154 retval = usb_register(&acm_driver); 2155 if (retval) { 2156 tty_unregister_driver(acm_tty_driver); 2157 tty_driver_kref_put(acm_tty_driver); 2158 return retval; 2159 } 2160 2161 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2162 2163 return 0; 2164 } 2165 2166 static void __exit acm_exit(void) 2167 { 2168 usb_deregister(&acm_driver); 2169 tty_unregister_driver(acm_tty_driver); 2170 tty_driver_kref_put(acm_tty_driver); 2171 idr_destroy(&acm_minors); 2172 } 2173 2174 module_init(acm_init); 2175 module_exit(acm_exit); 2176 2177 MODULE_AUTHOR(DRIVER_AUTHOR); 2178 MODULE_DESCRIPTION(DRIVER_DESC); 2179 MODULE_LICENSE("GPL"); 2180 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2181