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; 334 335 if (difference & USB_CDC_SERIAL_STATE_DSR) 336 acm->iocount.dsr++; 337 if (difference & USB_CDC_SERIAL_STATE_DCD) 338 acm->iocount.dcd++; 339 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) { 340 acm->iocount.brk++; 341 tty_insert_flip_char(&acm->port, 0, TTY_BREAK); 342 } 343 if (newctrl & USB_CDC_SERIAL_STATE_RING_SIGNAL) 344 acm->iocount.rng++; 345 if (newctrl & USB_CDC_SERIAL_STATE_FRAMING) 346 acm->iocount.frame++; 347 if (newctrl & USB_CDC_SERIAL_STATE_PARITY) 348 acm->iocount.parity++; 349 if (newctrl & USB_CDC_SERIAL_STATE_OVERRUN) 350 acm->iocount.overrun++; 351 spin_unlock_irqrestore(&acm->read_lock, flags); 352 353 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) 354 tty_flip_buffer_push(&acm->port); 355 356 if (difference) 357 wake_up_all(&acm->wioctl); 358 359 break; 360 361 default: 362 dev_dbg(&acm->control->dev, 363 "%s - unknown notification %d received: index %d len %d\n", 364 __func__, 365 dr->bNotificationType, dr->wIndex, dr->wLength); 366 } 367 } 368 369 /* control interface reports status changes with "interrupt" transfers */ 370 static void acm_ctrl_irq(struct urb *urb) 371 { 372 struct acm *acm = urb->context; 373 struct usb_cdc_notification *dr; 374 unsigned int current_size = urb->actual_length; 375 unsigned int expected_size, copy_size, alloc_size; 376 int retval; 377 int status = urb->status; 378 379 switch (status) { 380 case 0: 381 /* success */ 382 break; 383 case -ECONNRESET: 384 case -ENOENT: 385 case -ESHUTDOWN: 386 /* this urb is terminated, clean up */ 387 dev_dbg(&acm->control->dev, 388 "%s - urb shutting down with status: %d\n", 389 __func__, status); 390 return; 391 default: 392 dev_dbg(&acm->control->dev, 393 "%s - nonzero urb status received: %d\n", 394 __func__, status); 395 goto exit; 396 } 397 398 usb_mark_last_busy(acm->dev); 399 400 if (acm->nb_index == 0) { 401 /* 402 * The first chunk of a message must contain at least the 403 * notification header with the length field, otherwise we 404 * can't get an expected_size. 405 */ 406 if (current_size < sizeof(struct usb_cdc_notification)) { 407 dev_dbg(&acm->control->dev, "urb too short\n"); 408 goto exit; 409 } 410 dr = urb->transfer_buffer; 411 } else { 412 dr = (struct usb_cdc_notification *)acm->notification_buffer; 413 } 414 /* size = notification-header + (optional) data */ 415 expected_size = sizeof(struct usb_cdc_notification) + 416 le16_to_cpu(dr->wLength); 417 418 if (acm->nb_index != 0 || current_size < expected_size) { 419 /* notification is transmitted fragmented, reassemble */ 420 if (acm->nb_size < expected_size) { 421 u8 *new_buffer; 422 alloc_size = roundup_pow_of_two(expected_size); 423 /* Final freeing is done on disconnect. */ 424 new_buffer = krealloc(acm->notification_buffer, 425 alloc_size, GFP_ATOMIC); 426 if (!new_buffer) { 427 acm->nb_index = 0; 428 goto exit; 429 } 430 431 acm->notification_buffer = new_buffer; 432 acm->nb_size = alloc_size; 433 dr = (struct usb_cdc_notification *)acm->notification_buffer; 434 } 435 436 copy_size = min(current_size, 437 expected_size - acm->nb_index); 438 439 memcpy(&acm->notification_buffer[acm->nb_index], 440 urb->transfer_buffer, copy_size); 441 acm->nb_index += copy_size; 442 current_size = acm->nb_index; 443 } 444 445 if (current_size >= expected_size) { 446 /* notification complete */ 447 acm_process_notification(acm, (unsigned char *)dr); 448 acm->nb_index = 0; 449 } 450 451 exit: 452 retval = usb_submit_urb(urb, GFP_ATOMIC); 453 if (retval && retval != -EPERM && retval != -ENODEV) 454 dev_err(&acm->control->dev, 455 "%s - usb_submit_urb failed: %d\n", __func__, retval); 456 else 457 dev_vdbg(&acm->control->dev, 458 "control resubmission terminated %d\n", retval); 459 } 460 461 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 462 { 463 int res; 464 465 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 466 return 0; 467 468 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 469 if (res) { 470 if (res != -EPERM && res != -ENODEV) { 471 dev_err(&acm->data->dev, 472 "urb %d failed submission with %d\n", 473 index, res); 474 } else { 475 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 476 } 477 set_bit(index, &acm->read_urbs_free); 478 return res; 479 } else { 480 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 481 } 482 483 return 0; 484 } 485 486 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 487 { 488 int res; 489 int i; 490 491 for (i = 0; i < acm->rx_buflimit; ++i) { 492 res = acm_submit_read_urb(acm, i, mem_flags); 493 if (res) 494 return res; 495 } 496 497 return 0; 498 } 499 500 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 501 { 502 unsigned long flags; 503 504 if (!urb->actual_length) 505 return; 506 507 spin_lock_irqsave(&acm->read_lock, flags); 508 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 509 urb->actual_length); 510 spin_unlock_irqrestore(&acm->read_lock, flags); 511 512 tty_flip_buffer_push(&acm->port); 513 } 514 515 static void acm_read_bulk_callback(struct urb *urb) 516 { 517 struct acm_rb *rb = urb->context; 518 struct acm *acm = rb->instance; 519 int status = urb->status; 520 bool stopped = false; 521 bool stalled = false; 522 bool cooldown = false; 523 524 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 525 rb->index, urb->actual_length, status); 526 527 switch (status) { 528 case 0: 529 usb_mark_last_busy(acm->dev); 530 acm_process_read_urb(acm, urb); 531 break; 532 case -EPIPE: 533 set_bit(EVENT_RX_STALL, &acm->flags); 534 stalled = true; 535 break; 536 case -ENOENT: 537 case -ECONNRESET: 538 case -ESHUTDOWN: 539 dev_dbg(&acm->data->dev, 540 "%s - urb shutting down with status: %d\n", 541 __func__, status); 542 stopped = true; 543 break; 544 case -EOVERFLOW: 545 case -EPROTO: 546 dev_dbg(&acm->data->dev, 547 "%s - cooling babbling device\n", __func__); 548 usb_mark_last_busy(acm->dev); 549 set_bit(rb->index, &acm->urbs_in_error_delay); 550 set_bit(ACM_ERROR_DELAY, &acm->flags); 551 cooldown = true; 552 break; 553 default: 554 dev_dbg(&acm->data->dev, 555 "%s - nonzero urb status received: %d\n", 556 __func__, status); 557 break; 558 } 559 560 /* 561 * Make sure URB processing is done before marking as free to avoid 562 * racing with unthrottle() on another CPU. Matches the barriers 563 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 564 */ 565 smp_mb__before_atomic(); 566 set_bit(rb->index, &acm->read_urbs_free); 567 /* 568 * Make sure URB is marked as free before checking the throttled flag 569 * to avoid racing with unthrottle() on another CPU. Matches the 570 * smp_mb() in unthrottle(). 571 */ 572 smp_mb__after_atomic(); 573 574 if (stopped || stalled || cooldown) { 575 if (stalled) 576 schedule_delayed_work(&acm->dwork, 0); 577 else if (cooldown) 578 schedule_delayed_work(&acm->dwork, HZ / 2); 579 return; 580 } 581 582 if (test_bit(ACM_THROTTLED, &acm->flags)) 583 return; 584 585 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 586 } 587 588 /* data interface wrote those outgoing bytes */ 589 static void acm_write_bulk(struct urb *urb) 590 { 591 struct acm_wb *wb = urb->context; 592 struct acm *acm = wb->instance; 593 unsigned long flags; 594 int status = urb->status; 595 596 if (status || (urb->actual_length != urb->transfer_buffer_length)) 597 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 598 urb->actual_length, 599 urb->transfer_buffer_length, 600 status); 601 602 spin_lock_irqsave(&acm->write_lock, flags); 603 acm_write_done(acm, wb); 604 spin_unlock_irqrestore(&acm->write_lock, flags); 605 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 606 schedule_delayed_work(&acm->dwork, 0); 607 } 608 609 static void acm_softint(struct work_struct *work) 610 { 611 int i; 612 struct acm *acm = container_of(work, struct acm, dwork.work); 613 614 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 615 smp_mb(); /* against acm_suspend() */ 616 if (!acm->susp_count) { 617 for (i = 0; i < acm->rx_buflimit; i++) 618 usb_kill_urb(acm->read_urbs[i]); 619 usb_clear_halt(acm->dev, acm->in); 620 acm_submit_read_urbs(acm, GFP_KERNEL); 621 clear_bit(EVENT_RX_STALL, &acm->flags); 622 } 623 } 624 625 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 626 for (i = 0; i < acm->rx_buflimit; i++) 627 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 628 acm_submit_read_urb(acm, i, GFP_KERNEL); 629 } 630 631 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 632 tty_port_tty_wakeup(&acm->port); 633 } 634 635 /* 636 * TTY handlers 637 */ 638 639 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 640 { 641 struct acm *acm; 642 int retval; 643 644 acm = acm_get_by_minor(tty->index); 645 if (!acm) 646 return -ENODEV; 647 648 retval = tty_standard_install(driver, tty); 649 if (retval) 650 goto error_init_termios; 651 652 /* 653 * Suppress initial echoing for some devices which might send data 654 * immediately after acm driver has been installed. 655 */ 656 if (acm->quirks & DISABLE_ECHO) 657 tty->termios.c_lflag &= ~ECHO; 658 659 tty->driver_data = acm; 660 661 return 0; 662 663 error_init_termios: 664 tty_port_put(&acm->port); 665 return retval; 666 } 667 668 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 669 { 670 struct acm *acm = tty->driver_data; 671 672 return tty_port_open(&acm->port, tty, filp); 673 } 674 675 static void acm_port_dtr_rts(struct tty_port *port, bool active) 676 { 677 struct acm *acm = container_of(port, struct acm, port); 678 int val; 679 int res; 680 681 if (active) 682 val = USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS; 683 else 684 val = 0; 685 686 /* FIXME: add missing ctrlout locking throughout driver */ 687 acm->ctrlout = val; 688 689 res = acm_set_control(acm, val); 690 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 691 /* This is broken in too many devices to spam the logs */ 692 dev_dbg(&acm->control->dev, "failed to set dtr/rts\n"); 693 } 694 695 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 696 { 697 struct acm *acm = container_of(port, struct acm, port); 698 int retval = -ENODEV; 699 int i; 700 701 mutex_lock(&acm->mutex); 702 if (acm->disconnected) 703 goto disconnected; 704 705 retval = usb_autopm_get_interface(acm->control); 706 if (retval) 707 goto error_get_interface; 708 709 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 710 acm->control->needs_remote_wakeup = 1; 711 712 if (!(acm->quirks & ALWAYS_POLL_CTRL)) { 713 acm->ctrlurb->dev = acm->dev; 714 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 715 if (retval) { 716 dev_err(&acm->control->dev, 717 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 718 goto error_submit_urb; 719 } 720 } 721 722 acm_tty_set_termios(tty, NULL); 723 724 /* 725 * Unthrottle device in case the TTY was closed while throttled. 726 */ 727 clear_bit(ACM_THROTTLED, &acm->flags); 728 729 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 730 if (retval) 731 goto error_submit_read_urbs; 732 733 usb_autopm_put_interface(acm->control); 734 735 mutex_unlock(&acm->mutex); 736 737 return 0; 738 739 error_submit_read_urbs: 740 for (i = 0; i < acm->rx_buflimit; i++) 741 usb_kill_urb(acm->read_urbs[i]); 742 usb_kill_urb(acm->ctrlurb); 743 error_submit_urb: 744 usb_autopm_put_interface(acm->control); 745 error_get_interface: 746 disconnected: 747 mutex_unlock(&acm->mutex); 748 749 return usb_translate_errors(retval); 750 } 751 752 static void acm_port_destruct(struct tty_port *port) 753 { 754 struct acm *acm = container_of(port, struct acm, port); 755 756 if (acm->minor != ACM_MINOR_INVALID) 757 acm_release_minor(acm); 758 usb_put_intf(acm->control); 759 kfree(acm->country_codes); 760 kfree(acm); 761 } 762 763 static void acm_port_shutdown(struct tty_port *port) 764 { 765 struct acm *acm = container_of(port, struct acm, port); 766 struct urb *urb; 767 struct acm_wb *wb; 768 769 /* 770 * Need to grab write_lock to prevent race with resume, but no need to 771 * hold it due to the tty-port initialised flag. 772 */ 773 acm_poison_urbs(acm); 774 spin_lock_irq(&acm->write_lock); 775 spin_unlock_irq(&acm->write_lock); 776 777 usb_autopm_get_interface_no_resume(acm->control); 778 acm->control->needs_remote_wakeup = 0; 779 usb_autopm_put_interface(acm->control); 780 781 for (;;) { 782 urb = usb_get_from_anchor(&acm->delayed); 783 if (!urb) 784 break; 785 wb = urb->context; 786 wb->use = false; 787 usb_autopm_put_interface_async(acm->control); 788 } 789 790 if (acm->disconnected) 791 return; 792 793 acm_unpoison_urbs(acm); 794 795 if (acm->quirks & ALWAYS_POLL_CTRL) { 796 acm->ctrlurb->dev = acm->dev; 797 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) 798 dev_dbg(&acm->control->dev, 799 "ctrl polling restart failed after port close\n"); 800 /* port_shutdown() cleared DTR/RTS; restore them */ 801 acm_set_control(acm, USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS); 802 if (acm_submit_read_urbs(acm, GFP_KERNEL)) 803 dev_dbg(&acm->control->dev, 804 "read urb restart failed after port close\n"); 805 } 806 } 807 808 static void acm_tty_cleanup(struct tty_struct *tty) 809 { 810 struct acm *acm = tty->driver_data; 811 812 tty_port_put(&acm->port); 813 } 814 815 static void acm_tty_hangup(struct tty_struct *tty) 816 { 817 struct acm *acm = tty->driver_data; 818 819 tty_port_hangup(&acm->port); 820 } 821 822 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 823 { 824 struct acm *acm = tty->driver_data; 825 826 tty_port_close(&acm->port, tty, filp); 827 } 828 829 static ssize_t acm_tty_write(struct tty_struct *tty, const u8 *buf, 830 size_t count) 831 { 832 struct acm *acm = tty->driver_data; 833 int stat; 834 unsigned long flags; 835 int wbn; 836 struct acm_wb *wb; 837 838 if (!count) 839 return 0; 840 841 dev_vdbg(&acm->data->dev, "%zu bytes from tty layer\n", count); 842 843 spin_lock_irqsave(&acm->write_lock, flags); 844 wbn = acm_wb_alloc(acm); 845 if (wbn < 0) { 846 spin_unlock_irqrestore(&acm->write_lock, flags); 847 return 0; 848 } 849 wb = &acm->wb[wbn]; 850 851 if (!acm->dev) { 852 wb->use = false; 853 spin_unlock_irqrestore(&acm->write_lock, flags); 854 return -ENODEV; 855 } 856 857 count = (count > acm->writesize) ? acm->writesize : count; 858 dev_vdbg(&acm->data->dev, "writing %zu bytes\n", count); 859 memcpy(wb->buf, buf, count); 860 wb->len = count; 861 862 stat = usb_autopm_get_interface_async(acm->control); 863 if (stat) { 864 wb->use = false; 865 spin_unlock_irqrestore(&acm->write_lock, flags); 866 return stat; 867 } 868 869 if (acm->susp_count) { 870 usb_anchor_urb(wb->urb, &acm->delayed); 871 spin_unlock_irqrestore(&acm->write_lock, flags); 872 return count; 873 } 874 875 stat = acm_start_wb(acm, wb); 876 spin_unlock_irqrestore(&acm->write_lock, flags); 877 878 if (stat < 0) 879 return stat; 880 return count; 881 } 882 883 static unsigned int acm_tty_write_room(struct tty_struct *tty) 884 { 885 struct acm *acm = tty->driver_data; 886 /* 887 * Do not let the line discipline to know that we have a reserve, 888 * or it might get too enthusiastic. 889 */ 890 return acm_wb_is_avail(acm) ? acm->writesize : 0; 891 } 892 893 static void acm_tty_flush_buffer(struct tty_struct *tty) 894 { 895 struct acm *acm = tty->driver_data; 896 unsigned long flags; 897 int i; 898 899 spin_lock_irqsave(&acm->write_lock, flags); 900 for (i = 0; i < ACM_NW; i++) 901 if (acm->wb[i].use) 902 usb_unlink_urb(acm->wb[i].urb); 903 spin_unlock_irqrestore(&acm->write_lock, flags); 904 } 905 906 static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty) 907 { 908 struct acm *acm = tty->driver_data; 909 /* 910 * if the device was unplugged then any remaining characters fell out 911 * of the connector ;) 912 */ 913 if (acm->disconnected) 914 return 0; 915 /* 916 * This is inaccurate (overcounts), but it works. 917 */ 918 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 919 } 920 921 static void acm_tty_throttle(struct tty_struct *tty) 922 { 923 struct acm *acm = tty->driver_data; 924 925 set_bit(ACM_THROTTLED, &acm->flags); 926 } 927 928 static void acm_tty_unthrottle(struct tty_struct *tty) 929 { 930 struct acm *acm = tty->driver_data; 931 932 clear_bit(ACM_THROTTLED, &acm->flags); 933 934 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 935 smp_mb(); 936 937 acm_submit_read_urbs(acm, GFP_KERNEL); 938 } 939 940 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 941 { 942 struct acm *acm = tty->driver_data; 943 int retval; 944 945 if (!(acm->ctrl_caps & USB_CDC_CAP_BRK)) 946 return -EOPNOTSUPP; 947 948 retval = acm_send_break(acm, state ? 0xffff : 0); 949 if (retval < 0) 950 dev_dbg(&acm->control->dev, 951 "%s - send break failed\n", __func__); 952 return retval; 953 } 954 955 static int acm_tty_tiocmget(struct tty_struct *tty) 956 { 957 struct acm *acm = tty->driver_data; 958 959 return (acm->ctrlout & USB_CDC_CTRL_DTR ? TIOCM_DTR : 0) | 960 (acm->ctrlout & USB_CDC_CTRL_RTS ? TIOCM_RTS : 0) | 961 (acm->ctrlin & USB_CDC_SERIAL_STATE_DSR ? TIOCM_DSR : 0) | 962 (acm->ctrlin & USB_CDC_SERIAL_STATE_RING_SIGNAL ? TIOCM_RI : 0) | 963 (acm->ctrlin & USB_CDC_SERIAL_STATE_DCD ? TIOCM_CD : 0) | 964 TIOCM_CTS; 965 } 966 967 static int acm_tty_tiocmset(struct tty_struct *tty, 968 unsigned int set, unsigned int clear) 969 { 970 struct acm *acm = tty->driver_data; 971 unsigned int newctrl; 972 973 newctrl = acm->ctrlout; 974 set = (set & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 975 (set & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 976 clear = (clear & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 977 (clear & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 978 979 newctrl = (newctrl & ~clear) | set; 980 981 if (acm->ctrlout == newctrl) 982 return 0; 983 return acm_set_control(acm, acm->ctrlout = newctrl); 984 } 985 986 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 987 { 988 struct acm *acm = tty->driver_data; 989 990 ss->line = acm->minor; 991 mutex_lock(&acm->port.mutex); 992 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 993 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 994 ASYNC_CLOSING_WAIT_NONE : 995 jiffies_to_msecs(acm->port.closing_wait) / 10; 996 mutex_unlock(&acm->port.mutex); 997 return 0; 998 } 999 1000 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 1001 { 1002 struct acm *acm = tty->driver_data; 1003 unsigned int closing_wait, close_delay; 1004 int retval = 0; 1005 1006 close_delay = msecs_to_jiffies(ss->close_delay * 10); 1007 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 1008 ASYNC_CLOSING_WAIT_NONE : 1009 msecs_to_jiffies(ss->closing_wait * 10); 1010 1011 mutex_lock(&acm->port.mutex); 1012 1013 if (!capable(CAP_SYS_ADMIN)) { 1014 if ((close_delay != acm->port.close_delay) || 1015 (closing_wait != acm->port.closing_wait)) 1016 retval = -EPERM; 1017 } else { 1018 acm->port.close_delay = close_delay; 1019 acm->port.closing_wait = closing_wait; 1020 } 1021 1022 mutex_unlock(&acm->port.mutex); 1023 return retval; 1024 } 1025 1026 static int wait_serial_change(struct acm *acm, unsigned long arg) 1027 { 1028 int rv = 0; 1029 DECLARE_WAITQUEUE(wait, current); 1030 struct async_icount old, new; 1031 1032 spin_lock_irq(&acm->read_lock); 1033 old = acm->iocount; 1034 spin_unlock_irq(&acm->read_lock); 1035 1036 add_wait_queue(&acm->wioctl, &wait); 1037 for (;;) { 1038 set_current_state(TASK_INTERRUPTIBLE); 1039 1040 spin_lock_irq(&acm->read_lock); 1041 new = acm->iocount; 1042 spin_unlock_irq(&acm->read_lock); 1043 1044 if ((arg & TIOCM_DSR) && 1045 old.dsr != new.dsr) 1046 break; 1047 if ((arg & TIOCM_CD) && 1048 old.dcd != new.dcd) 1049 break; 1050 if ((arg & TIOCM_RI) && 1051 old.rng != new.rng) 1052 break; 1053 1054 if (acm->disconnected) { 1055 rv = -ENODEV; 1056 break; 1057 } 1058 1059 schedule(); 1060 1061 if (signal_pending(current)) { 1062 rv = -ERESTARTSYS; 1063 break; 1064 } 1065 } 1066 __set_current_state(TASK_RUNNING); 1067 remove_wait_queue(&acm->wioctl, &wait); 1068 1069 return rv; 1070 } 1071 1072 static int acm_tty_get_icount(struct tty_struct *tty, 1073 struct serial_icounter_struct *icount) 1074 { 1075 struct acm *acm = tty->driver_data; 1076 1077 icount->dsr = acm->iocount.dsr; 1078 icount->rng = acm->iocount.rng; 1079 icount->dcd = acm->iocount.dcd; 1080 icount->frame = acm->iocount.frame; 1081 icount->overrun = acm->iocount.overrun; 1082 icount->parity = acm->iocount.parity; 1083 icount->brk = acm->iocount.brk; 1084 1085 return 0; 1086 } 1087 1088 static int acm_tty_ioctl(struct tty_struct *tty, 1089 unsigned int cmd, unsigned long arg) 1090 { 1091 struct acm *acm = tty->driver_data; 1092 int rv = -ENOIOCTLCMD; 1093 1094 switch (cmd) { 1095 case TIOCMIWAIT: 1096 rv = usb_autopm_get_interface(acm->control); 1097 if (rv < 0) { 1098 rv = -EIO; 1099 break; 1100 } 1101 rv = wait_serial_change(acm, arg); 1102 usb_autopm_put_interface(acm->control); 1103 break; 1104 } 1105 1106 return rv; 1107 } 1108 1109 static void acm_tty_set_termios(struct tty_struct *tty, 1110 const struct ktermios *termios_old) 1111 { 1112 struct acm *acm = tty->driver_data; 1113 struct ktermios *termios = &tty->termios; 1114 struct usb_cdc_line_coding newline; 1115 int newctrl = acm->ctrlout; 1116 1117 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1118 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1119 newline.bParityType = termios->c_cflag & PARENB ? 1120 (termios->c_cflag & PARODD ? 1 : 2) + 1121 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1122 newline.bDataBits = tty_get_char_size(termios->c_cflag); 1123 1124 /* FIXME: Needs to clear unsupported bits in the termios */ 1125 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1126 1127 if (C_BAUD(tty) == B0) { 1128 newline.dwDTERate = acm->line.dwDTERate; 1129 newctrl &= ~USB_CDC_CTRL_DTR; 1130 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1131 newctrl |= USB_CDC_CTRL_DTR; 1132 } 1133 1134 if (newctrl != acm->ctrlout) 1135 acm_set_control(acm, acm->ctrlout = newctrl); 1136 1137 if (memcmp(&acm->line, &newline, sizeof newline)) { 1138 memcpy(&acm->line, &newline, sizeof newline); 1139 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1140 __func__, 1141 le32_to_cpu(newline.dwDTERate), 1142 newline.bCharFormat, newline.bParityType, 1143 newline.bDataBits); 1144 acm_set_line(acm, &acm->line); 1145 } 1146 } 1147 1148 static const struct tty_port_operations acm_port_ops = { 1149 .dtr_rts = acm_port_dtr_rts, 1150 .shutdown = acm_port_shutdown, 1151 .activate = acm_port_activate, 1152 .destruct = acm_port_destruct, 1153 }; 1154 1155 /* 1156 * USB probe and disconnect routines. 1157 */ 1158 1159 /* Little helpers: write/read buffers free */ 1160 static void acm_write_buffers_free(struct acm *acm) 1161 { 1162 int i; 1163 struct acm_wb *wb; 1164 1165 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1166 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1167 } 1168 1169 static void acm_read_buffers_free(struct acm *acm) 1170 { 1171 int i; 1172 1173 for (i = 0; i < acm->rx_buflimit; i++) 1174 usb_free_coherent(acm->dev, acm->readsize, 1175 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1176 } 1177 1178 /* Little helper: write buffers allocate */ 1179 static int acm_write_buffers_alloc(struct acm *acm) 1180 { 1181 int i; 1182 struct acm_wb *wb; 1183 1184 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1185 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1186 &wb->dmah); 1187 if (!wb->buf) { 1188 while (i != 0) { 1189 --i; 1190 --wb; 1191 usb_free_coherent(acm->dev, acm->writesize, 1192 wb->buf, wb->dmah); 1193 } 1194 return -ENOMEM; 1195 } 1196 } 1197 return 0; 1198 } 1199 1200 static int acm_probe(struct usb_interface *intf, 1201 const struct usb_device_id *id) 1202 { 1203 struct usb_cdc_union_desc *union_header = NULL; 1204 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1205 unsigned char *buffer = intf->altsetting->extra; 1206 int buflen = intf->altsetting->extralen; 1207 struct usb_interface *control_interface; 1208 struct usb_interface *data_interface; 1209 struct usb_endpoint_descriptor *epctrl = NULL; 1210 struct usb_endpoint_descriptor *epread = NULL; 1211 struct usb_endpoint_descriptor *epwrite = NULL; 1212 struct usb_device *usb_dev = interface_to_usbdev(intf); 1213 struct usb_cdc_parsed_header h; 1214 struct acm *acm; 1215 int minor; 1216 int ctrlsize, readsize; 1217 u8 *buf; 1218 int call_intf_num = -1; 1219 int data_intf_num = -1; 1220 unsigned long quirks; 1221 int num_rx_buf; 1222 int i; 1223 int combined_interfaces = 0; 1224 struct device *tty_dev; 1225 int rv = -ENOMEM; 1226 int res; 1227 1228 /* normal quirks */ 1229 quirks = (unsigned long)id->driver_info; 1230 1231 if (quirks == IGNORE_DEVICE) 1232 return -ENODEV; 1233 1234 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1235 1236 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1237 1238 /* handle quirks deadly to normal probing*/ 1239 if (quirks == NO_UNION_NORMAL) { 1240 data_interface = usb_ifnum_to_if(usb_dev, 1); 1241 control_interface = usb_ifnum_to_if(usb_dev, 0); 1242 /* we would crash */ 1243 if (!data_interface || !control_interface) 1244 return -ENODEV; 1245 goto skip_normal_probe; 1246 } else if (quirks == NO_UNION_12) { 1247 data_interface = usb_ifnum_to_if(usb_dev, 2); 1248 control_interface = usb_ifnum_to_if(usb_dev, 1); 1249 if (!data_interface || !control_interface) 1250 return -ENODEV; 1251 goto skip_normal_probe; 1252 } 1253 1254 /* normal probing*/ 1255 if (!buffer) { 1256 dev_err(&intf->dev, "Weird descriptor references\n"); 1257 return -EINVAL; 1258 } 1259 1260 if (!buflen) { 1261 if (intf->cur_altsetting->endpoint && 1262 intf->cur_altsetting->endpoint->extralen && 1263 intf->cur_altsetting->endpoint->extra) { 1264 dev_dbg(&intf->dev, 1265 "Seeking extra descriptors on endpoint\n"); 1266 buflen = intf->cur_altsetting->endpoint->extralen; 1267 buffer = intf->cur_altsetting->endpoint->extra; 1268 } else { 1269 dev_err(&intf->dev, 1270 "Zero length descriptor references\n"); 1271 return -EINVAL; 1272 } 1273 } 1274 1275 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1276 union_header = h.usb_cdc_union_desc; 1277 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1278 if (cmgmd) 1279 call_intf_num = cmgmd->bDataInterface; 1280 1281 if (!union_header) { 1282 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1283 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1284 combined_interfaces = 1; 1285 control_interface = data_interface = intf; 1286 goto look_for_collapsed_interface; 1287 } else if (call_intf_num > 0) { 1288 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1289 data_intf_num = call_intf_num; 1290 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1291 control_interface = intf; 1292 } else { 1293 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1294 return -ENODEV; 1295 } 1296 } else { 1297 int class = -1; 1298 1299 data_intf_num = union_header->bSlaveInterface0; 1300 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1301 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1302 1303 if (control_interface) 1304 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1305 1306 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1307 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1308 combined_interfaces = 1; 1309 control_interface = data_interface = intf; 1310 goto look_for_collapsed_interface; 1311 } 1312 } 1313 1314 if (!control_interface || !data_interface) { 1315 dev_dbg(&intf->dev, "no interfaces\n"); 1316 return -ENODEV; 1317 } 1318 1319 if (data_intf_num != call_intf_num) 1320 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1321 1322 if (control_interface == data_interface) { 1323 /* some broken devices designed for windows work this way */ 1324 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1325 combined_interfaces = 1; 1326 /* a popular other OS doesn't use it */ 1327 quirks |= NO_CAP_LINE; 1328 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1329 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1330 return -EINVAL; 1331 } 1332 look_for_collapsed_interface: 1333 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1334 &epread, &epwrite, &epctrl, NULL); 1335 if (res) 1336 return res; 1337 1338 goto made_compressed_probe; 1339 } 1340 1341 skip_normal_probe: 1342 1343 /*workaround for switched interfaces */ 1344 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1345 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1346 dev_dbg(&intf->dev, 1347 "Your device has switched interfaces.\n"); 1348 swap(control_interface, data_interface); 1349 } else if (quirks & VENDOR_CLASS_DATA_IFACE) { 1350 dev_dbg(&intf->dev, 1351 "Vendor-specific data interface class, continuing.\n"); 1352 } else { 1353 return -EINVAL; 1354 } 1355 } 1356 1357 /* Accept probe requests only for the control interface */ 1358 if (!combined_interfaces && intf != control_interface) 1359 return -ENODEV; 1360 1361 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1362 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1363 return -EINVAL; 1364 1365 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1366 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1367 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1368 1369 1370 /* workaround for switched endpoints */ 1371 if (!usb_endpoint_dir_in(epread)) { 1372 /* descriptors are swapped */ 1373 dev_dbg(&intf->dev, 1374 "The data interface has switched endpoints\n"); 1375 swap(epread, epwrite); 1376 } 1377 made_compressed_probe: 1378 dev_dbg(&intf->dev, "interfaces are valid\n"); 1379 1380 acm = kzalloc_obj(struct acm); 1381 if (!acm) 1382 return -ENOMEM; 1383 1384 tty_port_init(&acm->port); 1385 acm->port.ops = &acm_port_ops; 1386 1387 ctrlsize = usb_endpoint_maxp(epctrl); 1388 readsize = usb_endpoint_maxp(epread) * 1389 (quirks == SINGLE_RX_URB ? 1 : 2); 1390 acm->combined_interfaces = combined_interfaces; 1391 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1392 acm->control = control_interface; 1393 acm->data = data_interface; 1394 1395 usb_get_intf(acm->control); /* undone in destruct() */ 1396 1397 minor = acm_alloc_minor(acm); 1398 if (minor < 0) { 1399 acm->minor = ACM_MINOR_INVALID; 1400 goto err_put_port; 1401 } 1402 1403 acm->minor = minor; 1404 acm->dev = usb_dev; 1405 if (h.usb_cdc_acm_descriptor) 1406 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1407 if (quirks & NO_CAP_LINE) 1408 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1409 if (quirks & MISSING_CAP_BRK) 1410 acm->ctrl_caps |= USB_CDC_CAP_BRK; 1411 acm->ctrlsize = ctrlsize; 1412 acm->readsize = readsize; 1413 acm->rx_buflimit = num_rx_buf; 1414 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1415 init_waitqueue_head(&acm->wioctl); 1416 spin_lock_init(&acm->write_lock); 1417 spin_lock_init(&acm->read_lock); 1418 mutex_init(&acm->mutex); 1419 if (usb_endpoint_xfer_int(epread)) { 1420 acm->bInterval = epread->bInterval; 1421 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1422 } else { 1423 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1424 } 1425 if (usb_endpoint_xfer_int(epwrite)) 1426 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1427 else 1428 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1429 init_usb_anchor(&acm->delayed); 1430 acm->quirks = quirks; 1431 1432 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1433 if (!buf) 1434 goto err_put_port; 1435 acm->ctrl_buffer = buf; 1436 1437 if (acm_write_buffers_alloc(acm) < 0) 1438 goto err_free_ctrl_buffer; 1439 1440 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1441 if (!acm->ctrlurb) 1442 goto err_free_write_buffers; 1443 1444 for (i = 0; i < num_rx_buf; i++) { 1445 struct acm_rb *rb = &(acm->read_buffers[i]); 1446 struct urb *urb; 1447 1448 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1449 &rb->dma); 1450 if (!rb->base) 1451 goto err_free_read_urbs; 1452 rb->index = i; 1453 rb->instance = acm; 1454 1455 urb = usb_alloc_urb(0, GFP_KERNEL); 1456 if (!urb) 1457 goto err_free_read_urbs; 1458 1459 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1460 urb->transfer_dma = rb->dma; 1461 if (usb_endpoint_xfer_int(epread)) 1462 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1463 acm->readsize, 1464 acm_read_bulk_callback, rb, 1465 acm->bInterval); 1466 else 1467 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1468 acm->readsize, 1469 acm_read_bulk_callback, rb); 1470 1471 acm->read_urbs[i] = urb; 1472 __set_bit(i, &acm->read_urbs_free); 1473 } 1474 for (i = 0; i < ACM_NW; i++) { 1475 struct acm_wb *snd = &(acm->wb[i]); 1476 1477 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1478 if (!snd->urb) 1479 goto err_free_write_urbs; 1480 1481 if (usb_endpoint_xfer_int(epwrite)) 1482 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1483 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1484 else 1485 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1486 NULL, acm->writesize, acm_write_bulk, snd); 1487 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1488 if (quirks & SEND_ZERO_PACKET) 1489 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1490 snd->instance = acm; 1491 } 1492 1493 usb_set_intfdata(intf, acm); 1494 1495 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1496 if (i < 0) 1497 goto err_free_write_urbs; 1498 1499 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1500 struct usb_cdc_country_functional_desc * cfd = 1501 h.usb_cdc_country_functional_desc; 1502 1503 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1504 if (!acm->country_codes) 1505 goto skip_countries; 1506 acm->country_code_size = cfd->bLength - 4; 1507 memcpy(acm->country_codes, cfd->wCountryCodes, 1508 cfd->bLength - 4); 1509 acm->country_rel_date = cfd->iCountryCodeRelDate; 1510 1511 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1512 if (i < 0) { 1513 kfree(acm->country_codes); 1514 acm->country_codes = NULL; 1515 acm->country_code_size = 0; 1516 goto skip_countries; 1517 } 1518 1519 i = device_create_file(&intf->dev, 1520 &dev_attr_iCountryCodeRelDate); 1521 if (i < 0) { 1522 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1523 kfree(acm->country_codes); 1524 acm->country_codes = NULL; 1525 acm->country_code_size = 0; 1526 goto skip_countries; 1527 } 1528 } 1529 1530 skip_countries: 1531 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1532 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1533 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1534 /* works around buggy devices */ 1535 epctrl->bInterval ? epctrl->bInterval : 16); 1536 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1537 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1538 acm->notification_buffer = NULL; 1539 acm->nb_index = 0; 1540 acm->nb_size = 0; 1541 1542 acm->line.dwDTERate = cpu_to_le32(9600); 1543 acm->line.bDataBits = 8; 1544 acm_set_line(acm, &acm->line); 1545 1546 if (quirks & ALWAYS_POLL_CTRL) 1547 acm_set_control(acm, USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS); 1548 1549 if (!acm->combined_interfaces) { 1550 rv = usb_driver_claim_interface(&acm_driver, data_interface, acm); 1551 if (rv) 1552 goto err_remove_files; 1553 } 1554 1555 if (quirks & CLEAR_HALT_CONDITIONS) { 1556 /* errors intentionally ignored */ 1557 usb_clear_halt(usb_dev, acm->in); 1558 usb_clear_halt(usb_dev, acm->out); 1559 } 1560 1561 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1562 &control_interface->dev); 1563 if (IS_ERR(tty_dev)) { 1564 rv = PTR_ERR(tty_dev); 1565 goto err_release_data_interface; 1566 } 1567 1568 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1569 1570 if (acm->quirks & ALWAYS_POLL_CTRL) { 1571 acm->ctrlurb->dev = acm->dev; 1572 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) 1573 dev_warn(&intf->dev, 1574 "failed to start persistent ctrl polling\n"); 1575 if (acm_submit_read_urbs(acm, GFP_KERNEL)) 1576 dev_warn(&intf->dev, 1577 "failed to start persistent bulk read polling\n"); 1578 } 1579 1580 return 0; 1581 1582 err_release_data_interface: 1583 if (!acm->combined_interfaces) { 1584 /* Clear driver data so that disconnect() returns early. */ 1585 usb_set_intfdata(data_interface, NULL); 1586 usb_driver_release_interface(&acm_driver, data_interface); 1587 } 1588 err_remove_files: 1589 if (acm->country_codes) { 1590 device_remove_file(&acm->control->dev, 1591 &dev_attr_wCountryCodes); 1592 device_remove_file(&acm->control->dev, 1593 &dev_attr_iCountryCodeRelDate); 1594 } 1595 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1596 err_free_write_urbs: 1597 for (i = 0; i < ACM_NW; i++) 1598 usb_free_urb(acm->wb[i].urb); 1599 err_free_read_urbs: 1600 for (i = 0; i < num_rx_buf; i++) 1601 usb_free_urb(acm->read_urbs[i]); 1602 acm_read_buffers_free(acm); 1603 usb_free_urb(acm->ctrlurb); 1604 err_free_write_buffers: 1605 acm_write_buffers_free(acm); 1606 err_free_ctrl_buffer: 1607 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1608 err_put_port: 1609 tty_port_put(&acm->port); 1610 1611 return rv; 1612 } 1613 1614 static void acm_disconnect(struct usb_interface *intf) 1615 { 1616 struct acm *acm = usb_get_intfdata(intf); 1617 int i; 1618 1619 /* sibling interface is already cleaning up */ 1620 if (!acm) 1621 return; 1622 1623 acm->disconnected = true; 1624 /* 1625 * there is a circular dependency. acm_softint() can resubmit 1626 * the URBs in error handling so we need to block any 1627 * submission right away 1628 */ 1629 acm_poison_urbs(acm); 1630 mutex_lock(&acm->mutex); 1631 if (acm->country_codes) { 1632 device_remove_file(&acm->control->dev, 1633 &dev_attr_wCountryCodes); 1634 device_remove_file(&acm->control->dev, 1635 &dev_attr_iCountryCodeRelDate); 1636 } 1637 wake_up_all(&acm->wioctl); 1638 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1639 usb_set_intfdata(acm->control, NULL); 1640 usb_set_intfdata(acm->data, NULL); 1641 mutex_unlock(&acm->mutex); 1642 1643 tty_port_tty_vhangup(&acm->port); 1644 1645 cancel_delayed_work_sync(&acm->dwork); 1646 1647 tty_unregister_device(acm_tty_driver, acm->minor); 1648 1649 usb_free_urb(acm->ctrlurb); 1650 for (i = 0; i < ACM_NW; i++) 1651 usb_free_urb(acm->wb[i].urb); 1652 for (i = 0; i < acm->rx_buflimit; i++) 1653 usb_free_urb(acm->read_urbs[i]); 1654 acm_write_buffers_free(acm); 1655 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1656 acm_read_buffers_free(acm); 1657 1658 kfree(acm->notification_buffer); 1659 1660 if (!acm->combined_interfaces) 1661 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1662 acm->data : acm->control); 1663 1664 tty_port_put(&acm->port); 1665 } 1666 1667 #ifdef CONFIG_PM 1668 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1669 { 1670 struct acm *acm = usb_get_intfdata(intf); 1671 int cnt; 1672 1673 spin_lock_irq(&acm->write_lock); 1674 if (PMSG_IS_AUTO(message)) { 1675 if (acm->transmitting) { 1676 spin_unlock_irq(&acm->write_lock); 1677 return -EBUSY; 1678 } 1679 } 1680 cnt = acm->susp_count++; 1681 spin_unlock_irq(&acm->write_lock); 1682 1683 if (cnt) 1684 return 0; 1685 1686 acm_poison_urbs(acm); 1687 cancel_delayed_work_sync(&acm->dwork); 1688 acm->urbs_in_error_delay = 0; 1689 1690 return 0; 1691 } 1692 1693 static int acm_resume(struct usb_interface *intf) 1694 { 1695 struct acm *acm = usb_get_intfdata(intf); 1696 struct urb *urb; 1697 int rv = 0; 1698 1699 spin_lock_irq(&acm->write_lock); 1700 1701 if (--acm->susp_count) 1702 goto out; 1703 1704 acm_unpoison_urbs(acm); 1705 1706 if (tty_port_initialized(&acm->port) || (acm->quirks & ALWAYS_POLL_CTRL)) { 1707 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1708 1709 for (;;) { 1710 urb = usb_get_from_anchor(&acm->delayed); 1711 if (!urb) 1712 break; 1713 1714 acm_start_wb(acm, urb->context); 1715 } 1716 1717 /* 1718 * delayed error checking because we must 1719 * do the write path at all cost 1720 */ 1721 if (rv < 0) 1722 goto out; 1723 1724 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1725 } 1726 out: 1727 spin_unlock_irq(&acm->write_lock); 1728 1729 return rv; 1730 } 1731 1732 static int acm_reset_resume(struct usb_interface *intf) 1733 { 1734 struct acm *acm = usb_get_intfdata(intf); 1735 1736 if (tty_port_initialized(&acm->port)) 1737 tty_port_tty_hangup(&acm->port, false); 1738 1739 return acm_resume(intf); 1740 } 1741 1742 #endif /* CONFIG_PM */ 1743 1744 static int acm_pre_reset(struct usb_interface *intf) 1745 { 1746 struct acm *acm = usb_get_intfdata(intf); 1747 1748 clear_bit(EVENT_RX_STALL, &acm->flags); 1749 acm->nb_index = 0; /* pending control transfers are lost */ 1750 1751 return 0; 1752 } 1753 1754 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1755 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1756 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1757 USB_CDC_ACM_PROTO_VENDOR) 1758 1759 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1760 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1761 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1762 USB_CDC_ACM_PROTO_VENDOR) 1763 1764 /* 1765 * USB driver structure. 1766 */ 1767 1768 static const struct usb_device_id acm_ids[] = { 1769 /* quirky and broken devices */ 1770 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1771 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1772 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1773 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1774 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1775 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1776 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1777 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1778 }, 1779 { USB_DEVICE(0x045b, 0x023c), /* Renesas R-Car H3 USB Download mode */ 1780 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1781 }, 1782 { USB_DEVICE(0x045b, 0x0247), /* Renesas R-Car D3 USB Download mode */ 1783 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1784 }, 1785 { USB_DEVICE(0x045b, 0x0248), /* Renesas R-Car M3-N USB Download mode */ 1786 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1787 }, 1788 { USB_DEVICE(0x045b, 0x024D), /* Renesas R-Car E3 USB Download mode */ 1789 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1790 }, 1791 { USB_DEVICE(0x04b8, 0x0d12), /* EPSON HMD Com&Sens */ 1792 .driver_info = NO_UNION_12, /* union descriptor is garbage */ 1793 }, 1794 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1795 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1796 }, 1797 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1798 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1799 }, 1800 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1801 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1802 }, 1803 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1804 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1805 }, 1806 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1807 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1808 }, 1809 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1810 .driver_info = SINGLE_RX_URB, 1811 }, 1812 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1813 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1814 }, 1815 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1816 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1817 }, 1818 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1819 .driver_info = SINGLE_RX_URB, 1820 }, 1821 { USB_DEVICE(0x1901, 0x0006), /* GE Healthcare Patient Monitor UI Controller */ 1822 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1823 }, 1824 { USB_DEVICE(0x1965, 0x0017), /* Uniden BC125AT */ 1825 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1826 }, 1827 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1828 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1829 }, 1830 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1831 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1832 }, 1833 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1834 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1835 }, 1836 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1837 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1838 }, 1839 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1840 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1841 }, 1842 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1843 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1844 }, 1845 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1846 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1847 }, 1848 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1849 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1850 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1851 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1852 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1853 }, 1854 /* Motorola H24 HSPA module: */ 1855 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1856 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1857 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1858 }, 1859 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1860 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1861 }, 1862 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1863 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1864 }, 1865 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1866 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1867 }, 1868 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1869 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1870 }, 1871 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1872 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1873 }, 1874 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1875 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1876 }, 1877 1878 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1879 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1880 data interface instead of 1881 communications interface. 1882 Maybe we should define a new 1883 quirk for this. */ 1884 }, 1885 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1886 .driver_info = NO_UNION_NORMAL, 1887 }, 1888 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1889 .driver_info = NO_UNION_NORMAL, 1890 }, 1891 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1892 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1893 }, 1894 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1895 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1896 }, 1897 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1898 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1899 }, 1900 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1901 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1902 }, 1903 { USB_DEVICE(0x0c26, 0x0020), /* Icom ICF3400 Serie */ 1904 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1905 }, 1906 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1907 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1908 }, 1909 1910 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1911 .driver_info = CLEAR_HALT_CONDITIONS, 1912 }, 1913 1914 /* Nokia S60 phones expose two ACM channels. The first is 1915 * a modem and is picked up by the standard AT-command 1916 * information below. The second is 'vendor-specific' but 1917 * is treated as a serial device at the S60 end, so we want 1918 * to expose it on Linux too. */ 1919 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1920 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1921 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1922 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1923 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1924 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1925 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1926 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1927 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1928 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1929 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1930 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1931 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1932 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1933 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1934 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1935 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1936 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1937 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1938 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1939 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1940 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1941 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1942 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1943 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1944 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1945 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1946 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1947 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1948 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1949 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1950 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1951 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1952 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1953 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1954 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1955 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1956 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1957 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1958 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1959 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1960 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1961 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1962 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1963 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1964 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1965 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1966 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1967 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1968 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1969 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1970 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1971 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1972 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1973 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1974 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1975 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1976 1977 /* Support for Owen devices */ 1978 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1979 1980 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1981 1982 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1983 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1984 .driver_info = IGNORE_DEVICE, 1985 }, 1986 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1987 .driver_info = IGNORE_DEVICE, 1988 }, 1989 #endif 1990 1991 #if IS_ENABLED(CONFIG_IR_TOY) 1992 { USB_DEVICE(0x04d8, 0xfd08), 1993 .driver_info = IGNORE_DEVICE, 1994 }, 1995 1996 { USB_DEVICE(0x04d8, 0xf58b), 1997 .driver_info = IGNORE_DEVICE, 1998 }, 1999 #endif 2000 2001 #if IS_ENABLED(CONFIG_USB_SERIAL_XR) 2002 { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE }, 2003 { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE }, 2004 { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE }, 2005 { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE }, 2006 { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE }, 2007 { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE }, 2008 { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE }, 2009 { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE }, 2010 { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE }, 2011 { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE }, 2012 { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE }, 2013 #endif 2014 2015 /*Samsung phone in firmware update mode */ 2016 { USB_DEVICE(0x04e8, 0x685d), 2017 .driver_info = IGNORE_DEVICE, 2018 }, 2019 2020 /* Exclude Infineon Flash Loader utility */ 2021 { USB_DEVICE(0x058b, 0x0041), 2022 .driver_info = IGNORE_DEVICE, 2023 }, 2024 2025 /* Exclude ETAS ES58x */ 2026 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 2027 .driver_info = IGNORE_DEVICE, 2028 }, 2029 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 2030 .driver_info = IGNORE_DEVICE, 2031 }, 2032 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 2033 .driver_info = IGNORE_DEVICE, 2034 }, 2035 2036 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 2037 .driver_info = SEND_ZERO_PACKET, 2038 }, 2039 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 2040 .driver_info = SEND_ZERO_PACKET, 2041 }, 2042 2043 /* Exclude Goodix Fingerprint Reader */ 2044 { USB_DEVICE(0x27c6, 0x5395), 2045 .driver_info = IGNORE_DEVICE, 2046 }, 2047 2048 /* Exclude Heimann Sensor GmbH USB appset demo */ 2049 { USB_DEVICE(0x32a7, 0x0000), 2050 .driver_info = IGNORE_DEVICE, 2051 }, 2052 2053 /* CH343 supports CAP_BRK, but doesn't advertise it */ 2054 { USB_DEVICE(0x1a86, 0x55d3), .driver_info = MISSING_CAP_BRK, }, 2055 2056 /* 2057 * Lenovo Yoga Book 9 14IAH10 (83KJ) — INGENIC 17EF:6161 touchscreen 2058 * composite device. The CDC ACM control interface (0) uses a standard 2059 * Union descriptor, but the data interface (1) is declared as vendor- 2060 * specific class (0xff) with no CDC data descriptors, so cdc-acm would 2061 * normally reject it. The firmware also requires continuous polling of 2062 * the notification endpoint (EP 0x82) to suppress a 20-second watchdog 2063 * reset; ALWAYS_POLL_CTRL keeps the ctrlurb active even when no TTY is 2064 * open. Match only the control interface by class to avoid probing the 2065 * vendor-specific data interface. 2066 */ 2067 { USB_DEVICE_INTERFACE_CLASS(0x17ef, 0x6161, USB_CLASS_COMM), 2068 .driver_info = VENDOR_CLASS_DATA_IFACE | ALWAYS_POLL_CTRL }, 2069 2070 /* control interfaces without any protocol set */ 2071 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2072 USB_CDC_PROTO_NONE) }, 2073 2074 /* control interfaces with various AT-command sets */ 2075 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2076 USB_CDC_ACM_PROTO_AT_V25TER) }, 2077 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2078 USB_CDC_ACM_PROTO_AT_PCCA101) }, 2079 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2080 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 2081 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2082 USB_CDC_ACM_PROTO_AT_GSM) }, 2083 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2084 USB_CDC_ACM_PROTO_AT_3G) }, 2085 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2086 USB_CDC_ACM_PROTO_AT_CDMA) }, 2087 2088 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 2089 .driver_info = SEND_ZERO_PACKET, 2090 }, 2091 2092 { } 2093 }; 2094 2095 MODULE_DEVICE_TABLE(usb, acm_ids); 2096 2097 static struct usb_driver acm_driver = { 2098 .name = "cdc_acm", 2099 .probe = acm_probe, 2100 .disconnect = acm_disconnect, 2101 #ifdef CONFIG_PM 2102 .suspend = acm_suspend, 2103 .resume = acm_resume, 2104 .reset_resume = acm_reset_resume, 2105 #endif 2106 .pre_reset = acm_pre_reset, 2107 .id_table = acm_ids, 2108 #ifdef CONFIG_PM 2109 .supports_autosuspend = 1, 2110 #endif 2111 .disable_hub_initiated_lpm = 1, 2112 }; 2113 2114 /* 2115 * TTY driver structures. 2116 */ 2117 2118 static const struct tty_operations acm_ops = { 2119 .install = acm_tty_install, 2120 .open = acm_tty_open, 2121 .close = acm_tty_close, 2122 .cleanup = acm_tty_cleanup, 2123 .hangup = acm_tty_hangup, 2124 .write = acm_tty_write, 2125 .write_room = acm_tty_write_room, 2126 .flush_buffer = acm_tty_flush_buffer, 2127 .ioctl = acm_tty_ioctl, 2128 .throttle = acm_tty_throttle, 2129 .unthrottle = acm_tty_unthrottle, 2130 .chars_in_buffer = acm_tty_chars_in_buffer, 2131 .break_ctl = acm_tty_break_ctl, 2132 .set_termios = acm_tty_set_termios, 2133 .tiocmget = acm_tty_tiocmget, 2134 .tiocmset = acm_tty_tiocmset, 2135 .get_serial = get_serial_info, 2136 .set_serial = set_serial_info, 2137 .get_icount = acm_tty_get_icount, 2138 }; 2139 2140 /* 2141 * Init / exit. 2142 */ 2143 2144 static int __init acm_init(void) 2145 { 2146 int retval; 2147 acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW | 2148 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_RESET_SAVED_TERMIOS); 2149 if (IS_ERR(acm_tty_driver)) 2150 return PTR_ERR(acm_tty_driver); 2151 acm_tty_driver->driver_name = "acm", 2152 acm_tty_driver->name = "ttyACM", 2153 acm_tty_driver->major = ACM_TTY_MAJOR, 2154 acm_tty_driver->minor_start = 0, 2155 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2156 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2157 acm_tty_driver->init_termios = tty_std_termios; 2158 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2159 HUPCL | CLOCAL; 2160 tty_set_operations(acm_tty_driver, &acm_ops); 2161 2162 retval = tty_register_driver(acm_tty_driver); 2163 if (retval) { 2164 tty_driver_kref_put(acm_tty_driver); 2165 return retval; 2166 } 2167 2168 retval = usb_register(&acm_driver); 2169 if (retval) { 2170 tty_unregister_driver(acm_tty_driver); 2171 tty_driver_kref_put(acm_tty_driver); 2172 return retval; 2173 } 2174 2175 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2176 2177 return 0; 2178 } 2179 2180 static void __exit acm_exit(void) 2181 { 2182 usb_deregister(&acm_driver); 2183 tty_unregister_driver(acm_tty_driver); 2184 tty_driver_kref_put(acm_tty_driver); 2185 idr_destroy(&acm_minors); 2186 } 2187 2188 module_init(acm_init); 2189 module_exit(acm_exit); 2190 2191 MODULE_AUTHOR(DRIVER_AUTHOR); 2192 MODULE_DESCRIPTION(DRIVER_DESC); 2193 MODULE_LICENSE("GPL"); 2194 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2195