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 if (acm_submit_read_urbs(acm, GFP_KERNEL)) 801 dev_dbg(&acm->control->dev, 802 "read urb restart failed after port close\n"); 803 } 804 } 805 806 static void acm_tty_cleanup(struct tty_struct *tty) 807 { 808 struct acm *acm = tty->driver_data; 809 810 tty_port_put(&acm->port); 811 } 812 813 static void acm_tty_hangup(struct tty_struct *tty) 814 { 815 struct acm *acm = tty->driver_data; 816 817 tty_port_hangup(&acm->port); 818 } 819 820 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 821 { 822 struct acm *acm = tty->driver_data; 823 824 tty_port_close(&acm->port, tty, filp); 825 } 826 827 static ssize_t acm_tty_write(struct tty_struct *tty, const u8 *buf, 828 size_t count) 829 { 830 struct acm *acm = tty->driver_data; 831 int stat; 832 unsigned long flags; 833 int wbn; 834 struct acm_wb *wb; 835 836 if (!count) 837 return 0; 838 839 dev_vdbg(&acm->data->dev, "%zu bytes from tty layer\n", count); 840 841 spin_lock_irqsave(&acm->write_lock, flags); 842 wbn = acm_wb_alloc(acm); 843 if (wbn < 0) { 844 spin_unlock_irqrestore(&acm->write_lock, flags); 845 return 0; 846 } 847 wb = &acm->wb[wbn]; 848 849 if (!acm->dev) { 850 wb->use = false; 851 spin_unlock_irqrestore(&acm->write_lock, flags); 852 return -ENODEV; 853 } 854 855 count = (count > acm->writesize) ? acm->writesize : count; 856 dev_vdbg(&acm->data->dev, "writing %zu bytes\n", count); 857 memcpy(wb->buf, buf, count); 858 wb->len = count; 859 860 stat = usb_autopm_get_interface_async(acm->control); 861 if (stat) { 862 wb->use = false; 863 spin_unlock_irqrestore(&acm->write_lock, flags); 864 return stat; 865 } 866 867 if (acm->susp_count) { 868 usb_anchor_urb(wb->urb, &acm->delayed); 869 spin_unlock_irqrestore(&acm->write_lock, flags); 870 return count; 871 } 872 873 stat = acm_start_wb(acm, wb); 874 spin_unlock_irqrestore(&acm->write_lock, flags); 875 876 if (stat < 0) 877 return stat; 878 return count; 879 } 880 881 static unsigned int acm_tty_write_room(struct tty_struct *tty) 882 { 883 struct acm *acm = tty->driver_data; 884 /* 885 * Do not let the line discipline to know that we have a reserve, 886 * or it might get too enthusiastic. 887 */ 888 return acm_wb_is_avail(acm) ? acm->writesize : 0; 889 } 890 891 static void acm_tty_flush_buffer(struct tty_struct *tty) 892 { 893 struct acm *acm = tty->driver_data; 894 unsigned long flags; 895 int i; 896 897 spin_lock_irqsave(&acm->write_lock, flags); 898 for (i = 0; i < ACM_NW; i++) 899 if (acm->wb[i].use) 900 usb_unlink_urb(acm->wb[i].urb); 901 spin_unlock_irqrestore(&acm->write_lock, flags); 902 } 903 904 static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty) 905 { 906 struct acm *acm = tty->driver_data; 907 /* 908 * if the device was unplugged then any remaining characters fell out 909 * of the connector ;) 910 */ 911 if (acm->disconnected) 912 return 0; 913 /* 914 * This is inaccurate (overcounts), but it works. 915 */ 916 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 917 } 918 919 static void acm_tty_throttle(struct tty_struct *tty) 920 { 921 struct acm *acm = tty->driver_data; 922 923 set_bit(ACM_THROTTLED, &acm->flags); 924 } 925 926 static void acm_tty_unthrottle(struct tty_struct *tty) 927 { 928 struct acm *acm = tty->driver_data; 929 930 clear_bit(ACM_THROTTLED, &acm->flags); 931 932 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 933 smp_mb(); 934 935 acm_submit_read_urbs(acm, GFP_KERNEL); 936 } 937 938 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 939 { 940 struct acm *acm = tty->driver_data; 941 int retval; 942 943 if (!(acm->ctrl_caps & USB_CDC_CAP_BRK)) 944 return -EOPNOTSUPP; 945 946 retval = acm_send_break(acm, state ? 0xffff : 0); 947 if (retval < 0) 948 dev_dbg(&acm->control->dev, 949 "%s - send break failed\n", __func__); 950 return retval; 951 } 952 953 static int acm_tty_tiocmget(struct tty_struct *tty) 954 { 955 struct acm *acm = tty->driver_data; 956 957 return (acm->ctrlout & USB_CDC_CTRL_DTR ? TIOCM_DTR : 0) | 958 (acm->ctrlout & USB_CDC_CTRL_RTS ? TIOCM_RTS : 0) | 959 (acm->ctrlin & USB_CDC_SERIAL_STATE_DSR ? TIOCM_DSR : 0) | 960 (acm->ctrlin & USB_CDC_SERIAL_STATE_RING_SIGNAL ? TIOCM_RI : 0) | 961 (acm->ctrlin & USB_CDC_SERIAL_STATE_DCD ? TIOCM_CD : 0) | 962 TIOCM_CTS; 963 } 964 965 static int acm_tty_tiocmset(struct tty_struct *tty, 966 unsigned int set, unsigned int clear) 967 { 968 struct acm *acm = tty->driver_data; 969 unsigned int newctrl; 970 971 newctrl = acm->ctrlout; 972 set = (set & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 973 (set & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 974 clear = (clear & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 975 (clear & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 976 977 newctrl = (newctrl & ~clear) | set; 978 979 if (acm->ctrlout == newctrl) 980 return 0; 981 return acm_set_control(acm, acm->ctrlout = newctrl); 982 } 983 984 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 985 { 986 struct acm *acm = tty->driver_data; 987 988 ss->line = acm->minor; 989 mutex_lock(&acm->port.mutex); 990 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 991 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 992 ASYNC_CLOSING_WAIT_NONE : 993 jiffies_to_msecs(acm->port.closing_wait) / 10; 994 mutex_unlock(&acm->port.mutex); 995 return 0; 996 } 997 998 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 999 { 1000 struct acm *acm = tty->driver_data; 1001 unsigned int closing_wait, close_delay; 1002 int retval = 0; 1003 1004 close_delay = msecs_to_jiffies(ss->close_delay * 10); 1005 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 1006 ASYNC_CLOSING_WAIT_NONE : 1007 msecs_to_jiffies(ss->closing_wait * 10); 1008 1009 mutex_lock(&acm->port.mutex); 1010 1011 if (!capable(CAP_SYS_ADMIN)) { 1012 if ((close_delay != acm->port.close_delay) || 1013 (closing_wait != acm->port.closing_wait)) 1014 retval = -EPERM; 1015 } else { 1016 acm->port.close_delay = close_delay; 1017 acm->port.closing_wait = closing_wait; 1018 } 1019 1020 mutex_unlock(&acm->port.mutex); 1021 return retval; 1022 } 1023 1024 static int wait_serial_change(struct acm *acm, unsigned long arg) 1025 { 1026 int rv = 0; 1027 DECLARE_WAITQUEUE(wait, current); 1028 struct async_icount old, new; 1029 1030 do { 1031 spin_lock_irq(&acm->read_lock); 1032 old = acm->oldcount; 1033 new = acm->iocount; 1034 acm->oldcount = new; 1035 spin_unlock_irq(&acm->read_lock); 1036 1037 if ((arg & TIOCM_DSR) && 1038 old.dsr != new.dsr) 1039 break; 1040 if ((arg & TIOCM_CD) && 1041 old.dcd != new.dcd) 1042 break; 1043 if ((arg & TIOCM_RI) && 1044 old.rng != new.rng) 1045 break; 1046 1047 add_wait_queue(&acm->wioctl, &wait); 1048 set_current_state(TASK_INTERRUPTIBLE); 1049 schedule(); 1050 remove_wait_queue(&acm->wioctl, &wait); 1051 if (acm->disconnected) { 1052 if (arg & TIOCM_CD) 1053 break; 1054 else 1055 rv = -ENODEV; 1056 } else { 1057 if (signal_pending(current)) 1058 rv = -ERESTARTSYS; 1059 } 1060 } while (!rv); 1061 1062 1063 1064 return rv; 1065 } 1066 1067 static int acm_tty_get_icount(struct tty_struct *tty, 1068 struct serial_icounter_struct *icount) 1069 { 1070 struct acm *acm = tty->driver_data; 1071 1072 icount->dsr = acm->iocount.dsr; 1073 icount->rng = acm->iocount.rng; 1074 icount->dcd = acm->iocount.dcd; 1075 icount->frame = acm->iocount.frame; 1076 icount->overrun = acm->iocount.overrun; 1077 icount->parity = acm->iocount.parity; 1078 icount->brk = acm->iocount.brk; 1079 1080 return 0; 1081 } 1082 1083 static int acm_tty_ioctl(struct tty_struct *tty, 1084 unsigned int cmd, unsigned long arg) 1085 { 1086 struct acm *acm = tty->driver_data; 1087 int rv = -ENOIOCTLCMD; 1088 1089 switch (cmd) { 1090 case TIOCMIWAIT: 1091 rv = usb_autopm_get_interface(acm->control); 1092 if (rv < 0) { 1093 rv = -EIO; 1094 break; 1095 } 1096 rv = wait_serial_change(acm, arg); 1097 usb_autopm_put_interface(acm->control); 1098 break; 1099 } 1100 1101 return rv; 1102 } 1103 1104 static void acm_tty_set_termios(struct tty_struct *tty, 1105 const struct ktermios *termios_old) 1106 { 1107 struct acm *acm = tty->driver_data; 1108 struct ktermios *termios = &tty->termios; 1109 struct usb_cdc_line_coding newline; 1110 int newctrl = acm->ctrlout; 1111 1112 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1113 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1114 newline.bParityType = termios->c_cflag & PARENB ? 1115 (termios->c_cflag & PARODD ? 1 : 2) + 1116 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1117 newline.bDataBits = tty_get_char_size(termios->c_cflag); 1118 1119 /* FIXME: Needs to clear unsupported bits in the termios */ 1120 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1121 1122 if (C_BAUD(tty) == B0) { 1123 newline.dwDTERate = acm->line.dwDTERate; 1124 newctrl &= ~USB_CDC_CTRL_DTR; 1125 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1126 newctrl |= USB_CDC_CTRL_DTR; 1127 } 1128 1129 if (newctrl != acm->ctrlout) 1130 acm_set_control(acm, acm->ctrlout = newctrl); 1131 1132 if (memcmp(&acm->line, &newline, sizeof newline)) { 1133 memcpy(&acm->line, &newline, sizeof newline); 1134 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1135 __func__, 1136 le32_to_cpu(newline.dwDTERate), 1137 newline.bCharFormat, newline.bParityType, 1138 newline.bDataBits); 1139 acm_set_line(acm, &acm->line); 1140 } 1141 } 1142 1143 static const struct tty_port_operations acm_port_ops = { 1144 .dtr_rts = acm_port_dtr_rts, 1145 .shutdown = acm_port_shutdown, 1146 .activate = acm_port_activate, 1147 .destruct = acm_port_destruct, 1148 }; 1149 1150 /* 1151 * USB probe and disconnect routines. 1152 */ 1153 1154 /* Little helpers: write/read buffers free */ 1155 static void acm_write_buffers_free(struct acm *acm) 1156 { 1157 int i; 1158 struct acm_wb *wb; 1159 1160 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1161 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1162 } 1163 1164 static void acm_read_buffers_free(struct acm *acm) 1165 { 1166 int i; 1167 1168 for (i = 0; i < acm->rx_buflimit; i++) 1169 usb_free_coherent(acm->dev, acm->readsize, 1170 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1171 } 1172 1173 /* Little helper: write buffers allocate */ 1174 static int acm_write_buffers_alloc(struct acm *acm) 1175 { 1176 int i; 1177 struct acm_wb *wb; 1178 1179 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1180 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1181 &wb->dmah); 1182 if (!wb->buf) { 1183 while (i != 0) { 1184 --i; 1185 --wb; 1186 usb_free_coherent(acm->dev, acm->writesize, 1187 wb->buf, wb->dmah); 1188 } 1189 return -ENOMEM; 1190 } 1191 } 1192 return 0; 1193 } 1194 1195 static int acm_probe(struct usb_interface *intf, 1196 const struct usb_device_id *id) 1197 { 1198 struct usb_cdc_union_desc *union_header = NULL; 1199 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1200 unsigned char *buffer = intf->altsetting->extra; 1201 int buflen = intf->altsetting->extralen; 1202 struct usb_interface *control_interface; 1203 struct usb_interface *data_interface; 1204 struct usb_endpoint_descriptor *epctrl = NULL; 1205 struct usb_endpoint_descriptor *epread = NULL; 1206 struct usb_endpoint_descriptor *epwrite = NULL; 1207 struct usb_device *usb_dev = interface_to_usbdev(intf); 1208 struct usb_cdc_parsed_header h; 1209 struct acm *acm; 1210 int minor; 1211 int ctrlsize, readsize; 1212 u8 *buf; 1213 int call_intf_num = -1; 1214 int data_intf_num = -1; 1215 unsigned long quirks; 1216 int num_rx_buf; 1217 int i; 1218 int combined_interfaces = 0; 1219 struct device *tty_dev; 1220 int rv = -ENOMEM; 1221 int res; 1222 1223 /* normal quirks */ 1224 quirks = (unsigned long)id->driver_info; 1225 1226 if (quirks == IGNORE_DEVICE) 1227 return -ENODEV; 1228 1229 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1230 1231 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1232 1233 /* handle quirks deadly to normal probing*/ 1234 if (quirks == NO_UNION_NORMAL) { 1235 data_interface = usb_ifnum_to_if(usb_dev, 1); 1236 control_interface = usb_ifnum_to_if(usb_dev, 0); 1237 /* we would crash */ 1238 if (!data_interface || !control_interface) 1239 return -ENODEV; 1240 goto skip_normal_probe; 1241 } else if (quirks == NO_UNION_12) { 1242 data_interface = usb_ifnum_to_if(usb_dev, 2); 1243 control_interface = usb_ifnum_to_if(usb_dev, 1); 1244 if (!data_interface || !control_interface) 1245 return -ENODEV; 1246 goto skip_normal_probe; 1247 } 1248 1249 /* normal probing*/ 1250 if (!buffer) { 1251 dev_err(&intf->dev, "Weird descriptor references\n"); 1252 return -EINVAL; 1253 } 1254 1255 if (!buflen) { 1256 if (intf->cur_altsetting->endpoint && 1257 intf->cur_altsetting->endpoint->extralen && 1258 intf->cur_altsetting->endpoint->extra) { 1259 dev_dbg(&intf->dev, 1260 "Seeking extra descriptors on endpoint\n"); 1261 buflen = intf->cur_altsetting->endpoint->extralen; 1262 buffer = intf->cur_altsetting->endpoint->extra; 1263 } else { 1264 dev_err(&intf->dev, 1265 "Zero length descriptor references\n"); 1266 return -EINVAL; 1267 } 1268 } 1269 1270 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1271 union_header = h.usb_cdc_union_desc; 1272 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1273 if (cmgmd) 1274 call_intf_num = cmgmd->bDataInterface; 1275 1276 if (!union_header) { 1277 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1278 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1279 combined_interfaces = 1; 1280 control_interface = data_interface = intf; 1281 goto look_for_collapsed_interface; 1282 } else if (call_intf_num > 0) { 1283 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1284 data_intf_num = call_intf_num; 1285 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1286 control_interface = intf; 1287 } else { 1288 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1289 return -ENODEV; 1290 } 1291 } else { 1292 int class = -1; 1293 1294 data_intf_num = union_header->bSlaveInterface0; 1295 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1296 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1297 1298 if (control_interface) 1299 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1300 1301 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1302 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1303 combined_interfaces = 1; 1304 control_interface = data_interface = intf; 1305 goto look_for_collapsed_interface; 1306 } 1307 } 1308 1309 if (!control_interface || !data_interface) { 1310 dev_dbg(&intf->dev, "no interfaces\n"); 1311 return -ENODEV; 1312 } 1313 1314 if (data_intf_num != call_intf_num) 1315 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1316 1317 if (control_interface == data_interface) { 1318 /* some broken devices designed for windows work this way */ 1319 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1320 combined_interfaces = 1; 1321 /* a popular other OS doesn't use it */ 1322 quirks |= NO_CAP_LINE; 1323 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1324 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1325 return -EINVAL; 1326 } 1327 look_for_collapsed_interface: 1328 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1329 &epread, &epwrite, &epctrl, NULL); 1330 if (res) 1331 return res; 1332 1333 goto made_compressed_probe; 1334 } 1335 1336 skip_normal_probe: 1337 1338 /*workaround for switched interfaces */ 1339 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1340 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1341 dev_dbg(&intf->dev, 1342 "Your device has switched interfaces.\n"); 1343 swap(control_interface, data_interface); 1344 } else if (quirks & VENDOR_CLASS_DATA_IFACE) { 1345 dev_dbg(&intf->dev, 1346 "Vendor-specific data interface class, continuing.\n"); 1347 } else { 1348 return -EINVAL; 1349 } 1350 } 1351 1352 /* Accept probe requests only for the control interface */ 1353 if (!combined_interfaces && intf != control_interface) 1354 return -ENODEV; 1355 1356 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1357 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1358 return -EINVAL; 1359 1360 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1361 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1362 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1363 1364 1365 /* workaround for switched endpoints */ 1366 if (!usb_endpoint_dir_in(epread)) { 1367 /* descriptors are swapped */ 1368 dev_dbg(&intf->dev, 1369 "The data interface has switched endpoints\n"); 1370 swap(epread, epwrite); 1371 } 1372 made_compressed_probe: 1373 dev_dbg(&intf->dev, "interfaces are valid\n"); 1374 1375 acm = kzalloc_obj(struct acm); 1376 if (!acm) 1377 return -ENOMEM; 1378 1379 tty_port_init(&acm->port); 1380 acm->port.ops = &acm_port_ops; 1381 1382 ctrlsize = usb_endpoint_maxp(epctrl); 1383 readsize = usb_endpoint_maxp(epread) * 1384 (quirks == SINGLE_RX_URB ? 1 : 2); 1385 acm->combined_interfaces = combined_interfaces; 1386 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1387 acm->control = control_interface; 1388 acm->data = data_interface; 1389 1390 usb_get_intf(acm->control); /* undone in destruct() */ 1391 1392 minor = acm_alloc_minor(acm); 1393 if (minor < 0) { 1394 acm->minor = ACM_MINOR_INVALID; 1395 goto err_put_port; 1396 } 1397 1398 acm->minor = minor; 1399 acm->dev = usb_dev; 1400 if (h.usb_cdc_acm_descriptor) 1401 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1402 if (quirks & NO_CAP_LINE) 1403 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1404 if (quirks & MISSING_CAP_BRK) 1405 acm->ctrl_caps |= USB_CDC_CAP_BRK; 1406 acm->ctrlsize = ctrlsize; 1407 acm->readsize = readsize; 1408 acm->rx_buflimit = num_rx_buf; 1409 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1410 init_waitqueue_head(&acm->wioctl); 1411 spin_lock_init(&acm->write_lock); 1412 spin_lock_init(&acm->read_lock); 1413 mutex_init(&acm->mutex); 1414 if (usb_endpoint_xfer_int(epread)) { 1415 acm->bInterval = epread->bInterval; 1416 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1417 } else { 1418 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1419 } 1420 if (usb_endpoint_xfer_int(epwrite)) 1421 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1422 else 1423 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1424 init_usb_anchor(&acm->delayed); 1425 acm->quirks = quirks; 1426 1427 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1428 if (!buf) 1429 goto err_put_port; 1430 acm->ctrl_buffer = buf; 1431 1432 if (acm_write_buffers_alloc(acm) < 0) 1433 goto err_free_ctrl_buffer; 1434 1435 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1436 if (!acm->ctrlurb) 1437 goto err_free_write_buffers; 1438 1439 for (i = 0; i < num_rx_buf; i++) { 1440 struct acm_rb *rb = &(acm->read_buffers[i]); 1441 struct urb *urb; 1442 1443 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1444 &rb->dma); 1445 if (!rb->base) 1446 goto err_free_read_urbs; 1447 rb->index = i; 1448 rb->instance = acm; 1449 1450 urb = usb_alloc_urb(0, GFP_KERNEL); 1451 if (!urb) 1452 goto err_free_read_urbs; 1453 1454 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1455 urb->transfer_dma = rb->dma; 1456 if (usb_endpoint_xfer_int(epread)) 1457 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1458 acm->readsize, 1459 acm_read_bulk_callback, rb, 1460 acm->bInterval); 1461 else 1462 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1463 acm->readsize, 1464 acm_read_bulk_callback, rb); 1465 1466 acm->read_urbs[i] = urb; 1467 __set_bit(i, &acm->read_urbs_free); 1468 } 1469 for (i = 0; i < ACM_NW; i++) { 1470 struct acm_wb *snd = &(acm->wb[i]); 1471 1472 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1473 if (!snd->urb) 1474 goto err_free_write_urbs; 1475 1476 if (usb_endpoint_xfer_int(epwrite)) 1477 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1478 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1479 else 1480 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1481 NULL, acm->writesize, acm_write_bulk, snd); 1482 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1483 if (quirks & SEND_ZERO_PACKET) 1484 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1485 snd->instance = acm; 1486 } 1487 1488 usb_set_intfdata(intf, acm); 1489 1490 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1491 if (i < 0) 1492 goto err_free_write_urbs; 1493 1494 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1495 struct usb_cdc_country_functional_desc * cfd = 1496 h.usb_cdc_country_functional_desc; 1497 1498 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1499 if (!acm->country_codes) 1500 goto skip_countries; 1501 acm->country_code_size = cfd->bLength - 4; 1502 memcpy(acm->country_codes, cfd->wCountryCodes, 1503 cfd->bLength - 4); 1504 acm->country_rel_date = cfd->iCountryCodeRelDate; 1505 1506 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1507 if (i < 0) { 1508 kfree(acm->country_codes); 1509 acm->country_codes = NULL; 1510 acm->country_code_size = 0; 1511 goto skip_countries; 1512 } 1513 1514 i = device_create_file(&intf->dev, 1515 &dev_attr_iCountryCodeRelDate); 1516 if (i < 0) { 1517 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1518 kfree(acm->country_codes); 1519 acm->country_codes = NULL; 1520 acm->country_code_size = 0; 1521 goto skip_countries; 1522 } 1523 } 1524 1525 skip_countries: 1526 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1527 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1528 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1529 /* works around buggy devices */ 1530 epctrl->bInterval ? epctrl->bInterval : 16); 1531 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1532 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1533 acm->notification_buffer = NULL; 1534 acm->nb_index = 0; 1535 acm->nb_size = 0; 1536 1537 acm->line.dwDTERate = cpu_to_le32(9600); 1538 acm->line.bDataBits = 8; 1539 acm_set_line(acm, &acm->line); 1540 1541 if (quirks & ALWAYS_POLL_CTRL) 1542 acm_set_control(acm, USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS); 1543 1544 if (!acm->combined_interfaces) { 1545 rv = usb_driver_claim_interface(&acm_driver, data_interface, acm); 1546 if (rv) 1547 goto err_remove_files; 1548 } 1549 1550 if (quirks & CLEAR_HALT_CONDITIONS) { 1551 /* errors intentionally ignored */ 1552 usb_clear_halt(usb_dev, acm->in); 1553 usb_clear_halt(usb_dev, acm->out); 1554 } 1555 1556 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1557 &control_interface->dev); 1558 if (IS_ERR(tty_dev)) { 1559 rv = PTR_ERR(tty_dev); 1560 goto err_release_data_interface; 1561 } 1562 1563 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1564 1565 if (acm->quirks & ALWAYS_POLL_CTRL) { 1566 acm->ctrlurb->dev = acm->dev; 1567 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) 1568 dev_warn(&intf->dev, 1569 "failed to start persistent ctrl polling\n"); 1570 if (acm_submit_read_urbs(acm, GFP_KERNEL)) 1571 dev_warn(&intf->dev, 1572 "failed to start persistent bulk read polling\n"); 1573 } 1574 1575 return 0; 1576 1577 err_release_data_interface: 1578 if (!acm->combined_interfaces) { 1579 /* Clear driver data so that disconnect() returns early. */ 1580 usb_set_intfdata(data_interface, NULL); 1581 usb_driver_release_interface(&acm_driver, data_interface); 1582 } 1583 err_remove_files: 1584 if (acm->country_codes) { 1585 device_remove_file(&acm->control->dev, 1586 &dev_attr_wCountryCodes); 1587 device_remove_file(&acm->control->dev, 1588 &dev_attr_iCountryCodeRelDate); 1589 } 1590 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1591 err_free_write_urbs: 1592 for (i = 0; i < ACM_NW; i++) 1593 usb_free_urb(acm->wb[i].urb); 1594 err_free_read_urbs: 1595 for (i = 0; i < num_rx_buf; i++) 1596 usb_free_urb(acm->read_urbs[i]); 1597 acm_read_buffers_free(acm); 1598 usb_free_urb(acm->ctrlurb); 1599 err_free_write_buffers: 1600 acm_write_buffers_free(acm); 1601 err_free_ctrl_buffer: 1602 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1603 err_put_port: 1604 tty_port_put(&acm->port); 1605 1606 return rv; 1607 } 1608 1609 static void acm_disconnect(struct usb_interface *intf) 1610 { 1611 struct acm *acm = usb_get_intfdata(intf); 1612 int i; 1613 1614 /* sibling interface is already cleaning up */ 1615 if (!acm) 1616 return; 1617 1618 acm->disconnected = true; 1619 /* 1620 * there is a circular dependency. acm_softint() can resubmit 1621 * the URBs in error handling so we need to block any 1622 * submission right away 1623 */ 1624 acm_poison_urbs(acm); 1625 mutex_lock(&acm->mutex); 1626 if (acm->country_codes) { 1627 device_remove_file(&acm->control->dev, 1628 &dev_attr_wCountryCodes); 1629 device_remove_file(&acm->control->dev, 1630 &dev_attr_iCountryCodeRelDate); 1631 } 1632 wake_up_all(&acm->wioctl); 1633 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1634 usb_set_intfdata(acm->control, NULL); 1635 usb_set_intfdata(acm->data, NULL); 1636 mutex_unlock(&acm->mutex); 1637 1638 tty_port_tty_vhangup(&acm->port); 1639 1640 cancel_delayed_work_sync(&acm->dwork); 1641 1642 tty_unregister_device(acm_tty_driver, acm->minor); 1643 1644 usb_free_urb(acm->ctrlurb); 1645 for (i = 0; i < ACM_NW; i++) 1646 usb_free_urb(acm->wb[i].urb); 1647 for (i = 0; i < acm->rx_buflimit; i++) 1648 usb_free_urb(acm->read_urbs[i]); 1649 acm_write_buffers_free(acm); 1650 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1651 acm_read_buffers_free(acm); 1652 1653 kfree(acm->notification_buffer); 1654 1655 if (!acm->combined_interfaces) 1656 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1657 acm->data : acm->control); 1658 1659 tty_port_put(&acm->port); 1660 } 1661 1662 #ifdef CONFIG_PM 1663 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1664 { 1665 struct acm *acm = usb_get_intfdata(intf); 1666 int cnt; 1667 1668 spin_lock_irq(&acm->write_lock); 1669 if (PMSG_IS_AUTO(message)) { 1670 if (acm->transmitting) { 1671 spin_unlock_irq(&acm->write_lock); 1672 return -EBUSY; 1673 } 1674 } 1675 cnt = acm->susp_count++; 1676 spin_unlock_irq(&acm->write_lock); 1677 1678 if (cnt) 1679 return 0; 1680 1681 acm_poison_urbs(acm); 1682 cancel_delayed_work_sync(&acm->dwork); 1683 acm->urbs_in_error_delay = 0; 1684 1685 return 0; 1686 } 1687 1688 static int acm_resume(struct usb_interface *intf) 1689 { 1690 struct acm *acm = usb_get_intfdata(intf); 1691 struct urb *urb; 1692 int rv = 0; 1693 1694 spin_lock_irq(&acm->write_lock); 1695 1696 if (--acm->susp_count) 1697 goto out; 1698 1699 acm_unpoison_urbs(acm); 1700 1701 if (tty_port_initialized(&acm->port) || (acm->quirks & ALWAYS_POLL_CTRL)) { 1702 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1703 1704 for (;;) { 1705 urb = usb_get_from_anchor(&acm->delayed); 1706 if (!urb) 1707 break; 1708 1709 acm_start_wb(acm, urb->context); 1710 } 1711 1712 /* 1713 * delayed error checking because we must 1714 * do the write path at all cost 1715 */ 1716 if (rv < 0) 1717 goto out; 1718 1719 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1720 } 1721 out: 1722 spin_unlock_irq(&acm->write_lock); 1723 1724 return rv; 1725 } 1726 1727 static int acm_reset_resume(struct usb_interface *intf) 1728 { 1729 struct acm *acm = usb_get_intfdata(intf); 1730 1731 if (tty_port_initialized(&acm->port)) 1732 tty_port_tty_hangup(&acm->port, false); 1733 1734 return acm_resume(intf); 1735 } 1736 1737 #endif /* CONFIG_PM */ 1738 1739 static int acm_pre_reset(struct usb_interface *intf) 1740 { 1741 struct acm *acm = usb_get_intfdata(intf); 1742 1743 clear_bit(EVENT_RX_STALL, &acm->flags); 1744 acm->nb_index = 0; /* pending control transfers are lost */ 1745 1746 return 0; 1747 } 1748 1749 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1750 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1751 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1752 USB_CDC_ACM_PROTO_VENDOR) 1753 1754 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1755 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1756 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1757 USB_CDC_ACM_PROTO_VENDOR) 1758 1759 /* 1760 * USB driver structure. 1761 */ 1762 1763 static const struct usb_device_id acm_ids[] = { 1764 /* quirky and broken devices */ 1765 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1766 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1767 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1768 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1769 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1770 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1771 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1772 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1773 }, 1774 { USB_DEVICE(0x045b, 0x023c), /* Renesas R-Car H3 USB Download mode */ 1775 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1776 }, 1777 { USB_DEVICE(0x045b, 0x0247), /* Renesas R-Car D3 USB Download mode */ 1778 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1779 }, 1780 { USB_DEVICE(0x045b, 0x0248), /* Renesas R-Car M3-N USB Download mode */ 1781 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1782 }, 1783 { USB_DEVICE(0x045b, 0x024D), /* Renesas R-Car E3 USB Download mode */ 1784 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1785 }, 1786 { USB_DEVICE(0x04b8, 0x0d12), /* EPSON HMD Com&Sens */ 1787 .driver_info = NO_UNION_12, /* union descriptor is garbage */ 1788 }, 1789 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1790 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1791 }, 1792 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1793 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1794 }, 1795 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1796 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1797 }, 1798 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1799 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1800 }, 1801 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1802 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1803 }, 1804 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1805 .driver_info = SINGLE_RX_URB, 1806 }, 1807 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1808 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1809 }, 1810 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1811 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1812 }, 1813 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1814 .driver_info = SINGLE_RX_URB, 1815 }, 1816 { USB_DEVICE(0x1901, 0x0006), /* GE Healthcare Patient Monitor UI Controller */ 1817 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1818 }, 1819 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1820 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1821 }, 1822 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1823 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1824 }, 1825 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1826 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1827 }, 1828 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1829 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1830 }, 1831 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1832 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1833 }, 1834 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1835 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1836 }, 1837 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1838 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1839 }, 1840 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1841 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1842 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1843 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1844 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1845 }, 1846 /* Motorola H24 HSPA module: */ 1847 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1848 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1849 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1850 }, 1851 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1852 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1853 }, 1854 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1855 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1856 }, 1857 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1858 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1859 }, 1860 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1861 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1862 }, 1863 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1864 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1865 }, 1866 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1867 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1868 }, 1869 1870 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1871 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1872 data interface instead of 1873 communications interface. 1874 Maybe we should define a new 1875 quirk for this. */ 1876 }, 1877 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1878 .driver_info = NO_UNION_NORMAL, 1879 }, 1880 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1881 .driver_info = NO_UNION_NORMAL, 1882 }, 1883 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1884 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1885 }, 1886 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1887 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1888 }, 1889 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1890 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1891 }, 1892 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1893 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1894 }, 1895 { USB_DEVICE(0x0c26, 0x0020), /* Icom ICF3400 Serie */ 1896 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1897 }, 1898 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1899 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1900 }, 1901 1902 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1903 .driver_info = CLEAR_HALT_CONDITIONS, 1904 }, 1905 1906 /* Nokia S60 phones expose two ACM channels. The first is 1907 * a modem and is picked up by the standard AT-command 1908 * information below. The second is 'vendor-specific' but 1909 * is treated as a serial device at the S60 end, so we want 1910 * to expose it on Linux too. */ 1911 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1912 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1913 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1914 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1915 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1916 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1917 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1918 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1919 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1920 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1921 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1922 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1923 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1924 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1925 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1926 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1927 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1928 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1929 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1930 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1931 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1932 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1933 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1934 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1935 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1936 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1937 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1938 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1939 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1940 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1941 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1942 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1943 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1944 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1945 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1946 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1947 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1948 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1949 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1950 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1951 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1952 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1953 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1954 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1955 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1956 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1957 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1958 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1959 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1960 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1961 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1962 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1963 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1964 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1965 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1966 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1967 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1968 1969 /* Support for Owen devices */ 1970 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1971 1972 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1973 1974 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1975 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1976 .driver_info = IGNORE_DEVICE, 1977 }, 1978 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1979 .driver_info = IGNORE_DEVICE, 1980 }, 1981 #endif 1982 1983 #if IS_ENABLED(CONFIG_IR_TOY) 1984 { USB_DEVICE(0x04d8, 0xfd08), 1985 .driver_info = IGNORE_DEVICE, 1986 }, 1987 1988 { USB_DEVICE(0x04d8, 0xf58b), 1989 .driver_info = IGNORE_DEVICE, 1990 }, 1991 #endif 1992 1993 #if IS_ENABLED(CONFIG_USB_SERIAL_XR) 1994 { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE }, 1995 { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE }, 1996 { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE }, 1997 { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE }, 1998 { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE }, 1999 { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE }, 2000 { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE }, 2001 { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE }, 2002 { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE }, 2003 { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE }, 2004 { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE }, 2005 #endif 2006 2007 /*Samsung phone in firmware update mode */ 2008 { USB_DEVICE(0x04e8, 0x685d), 2009 .driver_info = IGNORE_DEVICE, 2010 }, 2011 2012 /* Exclude Infineon Flash Loader utility */ 2013 { USB_DEVICE(0x058b, 0x0041), 2014 .driver_info = IGNORE_DEVICE, 2015 }, 2016 2017 /* Exclude ETAS ES58x */ 2018 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 2019 .driver_info = IGNORE_DEVICE, 2020 }, 2021 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 2022 .driver_info = IGNORE_DEVICE, 2023 }, 2024 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 2025 .driver_info = IGNORE_DEVICE, 2026 }, 2027 2028 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 2029 .driver_info = SEND_ZERO_PACKET, 2030 }, 2031 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 2032 .driver_info = SEND_ZERO_PACKET, 2033 }, 2034 2035 /* Exclude Goodix Fingerprint Reader */ 2036 { USB_DEVICE(0x27c6, 0x5395), 2037 .driver_info = IGNORE_DEVICE, 2038 }, 2039 2040 /* Exclude Heimann Sensor GmbH USB appset demo */ 2041 { USB_DEVICE(0x32a7, 0x0000), 2042 .driver_info = IGNORE_DEVICE, 2043 }, 2044 2045 /* CH343 supports CAP_BRK, but doesn't advertise it */ 2046 { USB_DEVICE(0x1a86, 0x55d3), .driver_info = MISSING_CAP_BRK, }, 2047 2048 /* 2049 * Lenovo Yoga Book 9 14IAH10 (83KJ) — INGENIC 17EF:6161 touchscreen 2050 * composite device. The CDC ACM control interface (0) uses a standard 2051 * Union descriptor, but the data interface (1) is declared as vendor- 2052 * specific class (0xff) with no CDC data descriptors, so cdc-acm would 2053 * normally reject it. The firmware also requires continuous polling of 2054 * the notification endpoint (EP 0x82) to suppress a 20-second watchdog 2055 * reset; ALWAYS_POLL_CTRL keeps the ctrlurb active even when no TTY is 2056 * open. Match only the control interface by class to avoid probing the 2057 * vendor-specific data interface. 2058 */ 2059 { USB_DEVICE_INTERFACE_CLASS(0x17ef, 0x6161, USB_CLASS_COMM), 2060 .driver_info = VENDOR_CLASS_DATA_IFACE | ALWAYS_POLL_CTRL }, 2061 2062 /* control interfaces without any protocol set */ 2063 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2064 USB_CDC_PROTO_NONE) }, 2065 2066 /* control interfaces with various AT-command sets */ 2067 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2068 USB_CDC_ACM_PROTO_AT_V25TER) }, 2069 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2070 USB_CDC_ACM_PROTO_AT_PCCA101) }, 2071 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2072 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 2073 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2074 USB_CDC_ACM_PROTO_AT_GSM) }, 2075 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2076 USB_CDC_ACM_PROTO_AT_3G) }, 2077 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2078 USB_CDC_ACM_PROTO_AT_CDMA) }, 2079 2080 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 2081 .driver_info = SEND_ZERO_PACKET, 2082 }, 2083 2084 { } 2085 }; 2086 2087 MODULE_DEVICE_TABLE(usb, acm_ids); 2088 2089 static struct usb_driver acm_driver = { 2090 .name = "cdc_acm", 2091 .probe = acm_probe, 2092 .disconnect = acm_disconnect, 2093 #ifdef CONFIG_PM 2094 .suspend = acm_suspend, 2095 .resume = acm_resume, 2096 .reset_resume = acm_reset_resume, 2097 #endif 2098 .pre_reset = acm_pre_reset, 2099 .id_table = acm_ids, 2100 #ifdef CONFIG_PM 2101 .supports_autosuspend = 1, 2102 #endif 2103 .disable_hub_initiated_lpm = 1, 2104 }; 2105 2106 /* 2107 * TTY driver structures. 2108 */ 2109 2110 static const struct tty_operations acm_ops = { 2111 .install = acm_tty_install, 2112 .open = acm_tty_open, 2113 .close = acm_tty_close, 2114 .cleanup = acm_tty_cleanup, 2115 .hangup = acm_tty_hangup, 2116 .write = acm_tty_write, 2117 .write_room = acm_tty_write_room, 2118 .flush_buffer = acm_tty_flush_buffer, 2119 .ioctl = acm_tty_ioctl, 2120 .throttle = acm_tty_throttle, 2121 .unthrottle = acm_tty_unthrottle, 2122 .chars_in_buffer = acm_tty_chars_in_buffer, 2123 .break_ctl = acm_tty_break_ctl, 2124 .set_termios = acm_tty_set_termios, 2125 .tiocmget = acm_tty_tiocmget, 2126 .tiocmset = acm_tty_tiocmset, 2127 .get_serial = get_serial_info, 2128 .set_serial = set_serial_info, 2129 .get_icount = acm_tty_get_icount, 2130 }; 2131 2132 /* 2133 * Init / exit. 2134 */ 2135 2136 static int __init acm_init(void) 2137 { 2138 int retval; 2139 acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW | 2140 TTY_DRIVER_DYNAMIC_DEV); 2141 if (IS_ERR(acm_tty_driver)) 2142 return PTR_ERR(acm_tty_driver); 2143 acm_tty_driver->driver_name = "acm", 2144 acm_tty_driver->name = "ttyACM", 2145 acm_tty_driver->major = ACM_TTY_MAJOR, 2146 acm_tty_driver->minor_start = 0, 2147 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2148 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2149 acm_tty_driver->init_termios = tty_std_termios; 2150 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2151 HUPCL | CLOCAL; 2152 tty_set_operations(acm_tty_driver, &acm_ops); 2153 2154 retval = tty_register_driver(acm_tty_driver); 2155 if (retval) { 2156 tty_driver_kref_put(acm_tty_driver); 2157 return retval; 2158 } 2159 2160 retval = usb_register(&acm_driver); 2161 if (retval) { 2162 tty_unregister_driver(acm_tty_driver); 2163 tty_driver_kref_put(acm_tty_driver); 2164 return retval; 2165 } 2166 2167 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2168 2169 return 0; 2170 } 2171 2172 static void __exit acm_exit(void) 2173 { 2174 usb_deregister(&acm_driver); 2175 tty_unregister_driver(acm_tty_driver); 2176 tty_driver_kref_put(acm_tty_driver); 2177 idr_destroy(&acm_minors); 2178 } 2179 2180 module_init(acm_init); 2181 module_exit(acm_exit); 2182 2183 MODULE_AUTHOR(DRIVER_AUTHOR); 2184 MODULE_DESCRIPTION(DRIVER_DESC); 2185 MODULE_LICENSE("GPL"); 2186 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2187