1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * cdc-acm.c 4 * 5 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 6 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 7 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 8 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 9 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 10 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 11 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 12 * 13 * USB Abstract Control Model driver for USB modems and ISDN adapters 14 * 15 * Sponsored by SuSE 16 */ 17 18 #undef DEBUG 19 #undef VERBOSE_DEBUG 20 21 #include <linux/kernel.h> 22 #include <linux/sched/signal.h> 23 #include <linux/errno.h> 24 #include <linux/init.h> 25 #include <linux/slab.h> 26 #include <linux/log2.h> 27 #include <linux/tty.h> 28 #include <linux/serial.h> 29 #include <linux/tty_driver.h> 30 #include <linux/tty_flip.h> 31 #include <linux/module.h> 32 #include <linux/mutex.h> 33 #include <linux/uaccess.h> 34 #include <linux/usb.h> 35 #include <linux/usb/cdc.h> 36 #include <asm/byteorder.h> 37 #include <asm/unaligned.h> 38 #include <linux/idr.h> 39 #include <linux/list.h> 40 41 #include "cdc-acm.h" 42 43 44 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 45 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 46 47 static struct usb_driver acm_driver; 48 static struct tty_driver *acm_tty_driver; 49 50 static DEFINE_IDR(acm_minors); 51 static DEFINE_MUTEX(acm_minors_lock); 52 53 static void acm_tty_set_termios(struct tty_struct *tty, 54 const struct ktermios *termios_old); 55 56 /* 57 * acm_minors accessors 58 */ 59 60 /* 61 * Look up an ACM structure by minor. If found and not disconnected, increment 62 * its refcount and return it with its mutex held. 63 */ 64 static struct acm *acm_get_by_minor(unsigned int minor) 65 { 66 struct acm *acm; 67 68 mutex_lock(&acm_minors_lock); 69 acm = idr_find(&acm_minors, minor); 70 if (acm) { 71 mutex_lock(&acm->mutex); 72 if (acm->disconnected) { 73 mutex_unlock(&acm->mutex); 74 acm = NULL; 75 } else { 76 tty_port_get(&acm->port); 77 mutex_unlock(&acm->mutex); 78 } 79 } 80 mutex_unlock(&acm_minors_lock); 81 return acm; 82 } 83 84 /* 85 * Try to find an available minor number and if found, associate it with 'acm'. 86 */ 87 static int acm_alloc_minor(struct acm *acm) 88 { 89 int minor; 90 91 mutex_lock(&acm_minors_lock); 92 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 93 mutex_unlock(&acm_minors_lock); 94 95 return minor; 96 } 97 98 /* Release the minor number associated with 'acm'. */ 99 static void acm_release_minor(struct acm *acm) 100 { 101 mutex_lock(&acm_minors_lock); 102 idr_remove(&acm_minors, acm->minor); 103 mutex_unlock(&acm_minors_lock); 104 } 105 106 /* 107 * Functions for ACM control messages. 108 */ 109 110 static int acm_ctrl_msg(struct acm *acm, int request, int value, 111 void *buf, int len) 112 { 113 int retval; 114 115 retval = usb_autopm_get_interface(acm->control); 116 if (retval) 117 return retval; 118 119 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 120 request, USB_RT_ACM, value, 121 acm->control->altsetting[0].desc.bInterfaceNumber, 122 buf, len, USB_CTRL_SET_TIMEOUT); 123 124 dev_dbg(&acm->control->dev, 125 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 126 __func__, request, value, len, retval); 127 128 usb_autopm_put_interface(acm->control); 129 130 return retval < 0 ? retval : 0; 131 } 132 133 /* devices aren't required to support these requests. 134 * the cdc acm descriptor tells whether they do... 135 */ 136 static inline int acm_set_control(struct acm *acm, int control) 137 { 138 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 139 return -EOPNOTSUPP; 140 141 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 142 control, NULL, 0); 143 } 144 145 #define acm_set_line(acm, line) \ 146 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 147 #define acm_send_break(acm, ms) \ 148 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 149 150 static void acm_poison_urbs(struct acm *acm) 151 { 152 int i; 153 154 usb_poison_urb(acm->ctrlurb); 155 for (i = 0; i < ACM_NW; i++) 156 usb_poison_urb(acm->wb[i].urb); 157 for (i = 0; i < acm->rx_buflimit; i++) 158 usb_poison_urb(acm->read_urbs[i]); 159 } 160 161 static void acm_unpoison_urbs(struct acm *acm) 162 { 163 int i; 164 165 for (i = 0; i < acm->rx_buflimit; i++) 166 usb_unpoison_urb(acm->read_urbs[i]); 167 for (i = 0; i < ACM_NW; i++) 168 usb_unpoison_urb(acm->wb[i].urb); 169 usb_unpoison_urb(acm->ctrlurb); 170 } 171 172 173 /* 174 * Write buffer management. 175 * All of these assume proper locks taken by the caller. 176 */ 177 178 static int acm_wb_alloc(struct acm *acm) 179 { 180 int i, wbn; 181 struct acm_wb *wb; 182 183 wbn = 0; 184 i = 0; 185 for (;;) { 186 wb = &acm->wb[wbn]; 187 if (!wb->use) { 188 wb->use = true; 189 wb->len = 0; 190 return wbn; 191 } 192 wbn = (wbn + 1) % ACM_NW; 193 if (++i >= ACM_NW) 194 return -1; 195 } 196 } 197 198 static int acm_wb_is_avail(struct acm *acm) 199 { 200 int i, n; 201 unsigned long flags; 202 203 n = ACM_NW; 204 spin_lock_irqsave(&acm->write_lock, flags); 205 for (i = 0; i < ACM_NW; i++) 206 if(acm->wb[i].use) 207 n--; 208 spin_unlock_irqrestore(&acm->write_lock, flags); 209 return n; 210 } 211 212 /* 213 * Finish write. Caller must hold acm->write_lock 214 */ 215 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 216 { 217 wb->use = false; 218 acm->transmitting--; 219 usb_autopm_put_interface_async(acm->control); 220 } 221 222 /* 223 * Poke write. 224 * 225 * the caller is responsible for locking 226 */ 227 228 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 229 { 230 int rc; 231 232 acm->transmitting++; 233 234 wb->urb->transfer_buffer = wb->buf; 235 wb->urb->transfer_dma = wb->dmah; 236 wb->urb->transfer_buffer_length = wb->len; 237 wb->urb->dev = acm->dev; 238 239 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 240 if (rc < 0) { 241 if (rc != -EPERM) 242 dev_err(&acm->data->dev, 243 "%s - usb_submit_urb(write bulk) failed: %d\n", 244 __func__, rc); 245 acm_write_done(acm, wb); 246 } 247 return rc; 248 } 249 250 /* 251 * attributes exported through sysfs 252 */ 253 static ssize_t bmCapabilities_show 254 (struct device *dev, struct device_attribute *attr, char *buf) 255 { 256 struct usb_interface *intf = to_usb_interface(dev); 257 struct acm *acm = usb_get_intfdata(intf); 258 259 return sprintf(buf, "%d", acm->ctrl_caps); 260 } 261 static DEVICE_ATTR_RO(bmCapabilities); 262 263 static ssize_t wCountryCodes_show 264 (struct device *dev, struct device_attribute *attr, char *buf) 265 { 266 struct usb_interface *intf = to_usb_interface(dev); 267 struct acm *acm = usb_get_intfdata(intf); 268 269 memcpy(buf, acm->country_codes, acm->country_code_size); 270 return acm->country_code_size; 271 } 272 273 static DEVICE_ATTR_RO(wCountryCodes); 274 275 static ssize_t iCountryCodeRelDate_show 276 (struct device *dev, struct device_attribute *attr, char *buf) 277 { 278 struct usb_interface *intf = to_usb_interface(dev); 279 struct acm *acm = usb_get_intfdata(intf); 280 281 return sprintf(buf, "%d", acm->country_rel_date); 282 } 283 284 static DEVICE_ATTR_RO(iCountryCodeRelDate); 285 /* 286 * Interrupt handlers for various ACM device responses 287 */ 288 289 static void acm_process_notification(struct acm *acm, unsigned char *buf) 290 { 291 int newctrl; 292 int difference; 293 unsigned long flags; 294 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 295 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 296 297 switch (dr->bNotificationType) { 298 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 299 dev_dbg(&acm->control->dev, 300 "%s - network connection: %d\n", __func__, dr->wValue); 301 break; 302 303 case USB_CDC_NOTIFY_SERIAL_STATE: 304 if (le16_to_cpu(dr->wLength) != 2) { 305 dev_dbg(&acm->control->dev, 306 "%s - malformed serial state\n", __func__); 307 break; 308 } 309 310 newctrl = get_unaligned_le16(data); 311 dev_dbg(&acm->control->dev, 312 "%s - serial state: 0x%x\n", __func__, newctrl); 313 314 if (!acm->clocal && (acm->ctrlin & ~newctrl & USB_CDC_SERIAL_STATE_DCD)) { 315 dev_dbg(&acm->control->dev, 316 "%s - calling hangup\n", __func__); 317 tty_port_tty_hangup(&acm->port, false); 318 } 319 320 difference = acm->ctrlin ^ newctrl; 321 spin_lock_irqsave(&acm->read_lock, flags); 322 acm->ctrlin = newctrl; 323 acm->oldcount = acm->iocount; 324 325 if (difference & USB_CDC_SERIAL_STATE_DSR) 326 acm->iocount.dsr++; 327 if (difference & USB_CDC_SERIAL_STATE_DCD) 328 acm->iocount.dcd++; 329 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) { 330 acm->iocount.brk++; 331 tty_insert_flip_char(&acm->port, 0, TTY_BREAK); 332 } 333 if (newctrl & USB_CDC_SERIAL_STATE_RING_SIGNAL) 334 acm->iocount.rng++; 335 if (newctrl & USB_CDC_SERIAL_STATE_FRAMING) 336 acm->iocount.frame++; 337 if (newctrl & USB_CDC_SERIAL_STATE_PARITY) 338 acm->iocount.parity++; 339 if (newctrl & USB_CDC_SERIAL_STATE_OVERRUN) 340 acm->iocount.overrun++; 341 spin_unlock_irqrestore(&acm->read_lock, flags); 342 343 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) 344 tty_flip_buffer_push(&acm->port); 345 346 if (difference) 347 wake_up_all(&acm->wioctl); 348 349 break; 350 351 default: 352 dev_dbg(&acm->control->dev, 353 "%s - unknown notification %d received: index %d len %d\n", 354 __func__, 355 dr->bNotificationType, dr->wIndex, dr->wLength); 356 } 357 } 358 359 /* control interface reports status changes with "interrupt" transfers */ 360 static void acm_ctrl_irq(struct urb *urb) 361 { 362 struct acm *acm = urb->context; 363 struct usb_cdc_notification *dr = urb->transfer_buffer; 364 unsigned int current_size = urb->actual_length; 365 unsigned int expected_size, copy_size, alloc_size; 366 int retval; 367 int status = urb->status; 368 369 switch (status) { 370 case 0: 371 /* success */ 372 break; 373 case -ECONNRESET: 374 case -ENOENT: 375 case -ESHUTDOWN: 376 /* this urb is terminated, clean up */ 377 dev_dbg(&acm->control->dev, 378 "%s - urb shutting down with status: %d\n", 379 __func__, status); 380 return; 381 default: 382 dev_dbg(&acm->control->dev, 383 "%s - nonzero urb status received: %d\n", 384 __func__, status); 385 goto exit; 386 } 387 388 usb_mark_last_busy(acm->dev); 389 390 if (acm->nb_index) 391 dr = (struct usb_cdc_notification *)acm->notification_buffer; 392 393 /* size = notification-header + (optional) data */ 394 expected_size = sizeof(struct usb_cdc_notification) + 395 le16_to_cpu(dr->wLength); 396 397 if (current_size < expected_size) { 398 /* notification is transmitted fragmented, reassemble */ 399 if (acm->nb_size < expected_size) { 400 u8 *new_buffer; 401 alloc_size = roundup_pow_of_two(expected_size); 402 /* Final freeing is done on disconnect. */ 403 new_buffer = krealloc(acm->notification_buffer, 404 alloc_size, GFP_ATOMIC); 405 if (!new_buffer) { 406 acm->nb_index = 0; 407 goto exit; 408 } 409 410 acm->notification_buffer = new_buffer; 411 acm->nb_size = alloc_size; 412 dr = (struct usb_cdc_notification *)acm->notification_buffer; 413 } 414 415 copy_size = min(current_size, 416 expected_size - acm->nb_index); 417 418 memcpy(&acm->notification_buffer[acm->nb_index], 419 urb->transfer_buffer, copy_size); 420 acm->nb_index += copy_size; 421 current_size = acm->nb_index; 422 } 423 424 if (current_size >= expected_size) { 425 /* notification complete */ 426 acm_process_notification(acm, (unsigned char *)dr); 427 acm->nb_index = 0; 428 } 429 430 exit: 431 retval = usb_submit_urb(urb, GFP_ATOMIC); 432 if (retval && retval != -EPERM && retval != -ENODEV) 433 dev_err(&acm->control->dev, 434 "%s - usb_submit_urb failed: %d\n", __func__, retval); 435 else 436 dev_vdbg(&acm->control->dev, 437 "control resubmission terminated %d\n", retval); 438 } 439 440 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 441 { 442 int res; 443 444 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 445 return 0; 446 447 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 448 if (res) { 449 if (res != -EPERM && res != -ENODEV) { 450 dev_err(&acm->data->dev, 451 "urb %d failed submission with %d\n", 452 index, res); 453 } else { 454 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 455 } 456 set_bit(index, &acm->read_urbs_free); 457 return res; 458 } else { 459 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 460 } 461 462 return 0; 463 } 464 465 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 466 { 467 int res; 468 int i; 469 470 for (i = 0; i < acm->rx_buflimit; ++i) { 471 res = acm_submit_read_urb(acm, i, mem_flags); 472 if (res) 473 return res; 474 } 475 476 return 0; 477 } 478 479 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 480 { 481 unsigned long flags; 482 483 if (!urb->actual_length) 484 return; 485 486 spin_lock_irqsave(&acm->read_lock, flags); 487 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 488 urb->actual_length); 489 spin_unlock_irqrestore(&acm->read_lock, flags); 490 491 tty_flip_buffer_push(&acm->port); 492 } 493 494 static void acm_read_bulk_callback(struct urb *urb) 495 { 496 struct acm_rb *rb = urb->context; 497 struct acm *acm = rb->instance; 498 int status = urb->status; 499 bool stopped = false; 500 bool stalled = false; 501 bool cooldown = false; 502 503 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 504 rb->index, urb->actual_length, status); 505 506 switch (status) { 507 case 0: 508 usb_mark_last_busy(acm->dev); 509 acm_process_read_urb(acm, urb); 510 break; 511 case -EPIPE: 512 set_bit(EVENT_RX_STALL, &acm->flags); 513 stalled = true; 514 break; 515 case -ENOENT: 516 case -ECONNRESET: 517 case -ESHUTDOWN: 518 dev_dbg(&acm->data->dev, 519 "%s - urb shutting down with status: %d\n", 520 __func__, status); 521 stopped = true; 522 break; 523 case -EOVERFLOW: 524 case -EPROTO: 525 dev_dbg(&acm->data->dev, 526 "%s - cooling babbling device\n", __func__); 527 usb_mark_last_busy(acm->dev); 528 set_bit(rb->index, &acm->urbs_in_error_delay); 529 set_bit(ACM_ERROR_DELAY, &acm->flags); 530 cooldown = true; 531 break; 532 default: 533 dev_dbg(&acm->data->dev, 534 "%s - nonzero urb status received: %d\n", 535 __func__, status); 536 break; 537 } 538 539 /* 540 * Make sure URB processing is done before marking as free to avoid 541 * racing with unthrottle() on another CPU. Matches the barriers 542 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 543 */ 544 smp_mb__before_atomic(); 545 set_bit(rb->index, &acm->read_urbs_free); 546 /* 547 * Make sure URB is marked as free before checking the throttled flag 548 * to avoid racing with unthrottle() on another CPU. Matches the 549 * smp_mb() in unthrottle(). 550 */ 551 smp_mb__after_atomic(); 552 553 if (stopped || stalled || cooldown) { 554 if (stalled) 555 schedule_delayed_work(&acm->dwork, 0); 556 else if (cooldown) 557 schedule_delayed_work(&acm->dwork, HZ / 2); 558 return; 559 } 560 561 if (test_bit(ACM_THROTTLED, &acm->flags)) 562 return; 563 564 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 565 } 566 567 /* data interface wrote those outgoing bytes */ 568 static void acm_write_bulk(struct urb *urb) 569 { 570 struct acm_wb *wb = urb->context; 571 struct acm *acm = wb->instance; 572 unsigned long flags; 573 int status = urb->status; 574 575 if (status || (urb->actual_length != urb->transfer_buffer_length)) 576 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 577 urb->actual_length, 578 urb->transfer_buffer_length, 579 status); 580 581 spin_lock_irqsave(&acm->write_lock, flags); 582 acm_write_done(acm, wb); 583 spin_unlock_irqrestore(&acm->write_lock, flags); 584 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 585 schedule_delayed_work(&acm->dwork, 0); 586 } 587 588 static void acm_softint(struct work_struct *work) 589 { 590 int i; 591 struct acm *acm = container_of(work, struct acm, dwork.work); 592 593 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 594 smp_mb(); /* against acm_suspend() */ 595 if (!acm->susp_count) { 596 for (i = 0; i < acm->rx_buflimit; i++) 597 usb_kill_urb(acm->read_urbs[i]); 598 usb_clear_halt(acm->dev, acm->in); 599 acm_submit_read_urbs(acm, GFP_KERNEL); 600 clear_bit(EVENT_RX_STALL, &acm->flags); 601 } 602 } 603 604 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 605 for (i = 0; i < acm->rx_buflimit; i++) 606 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 607 acm_submit_read_urb(acm, i, GFP_KERNEL); 608 } 609 610 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 611 tty_port_tty_wakeup(&acm->port); 612 } 613 614 /* 615 * TTY handlers 616 */ 617 618 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 619 { 620 struct acm *acm; 621 int retval; 622 623 acm = acm_get_by_minor(tty->index); 624 if (!acm) 625 return -ENODEV; 626 627 retval = tty_standard_install(driver, tty); 628 if (retval) 629 goto error_init_termios; 630 631 /* 632 * Suppress initial echoing for some devices which might send data 633 * immediately after acm driver has been installed. 634 */ 635 if (acm->quirks & DISABLE_ECHO) 636 tty->termios.c_lflag &= ~ECHO; 637 638 tty->driver_data = acm; 639 640 return 0; 641 642 error_init_termios: 643 tty_port_put(&acm->port); 644 return retval; 645 } 646 647 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 648 { 649 struct acm *acm = tty->driver_data; 650 651 return tty_port_open(&acm->port, tty, filp); 652 } 653 654 static void acm_port_dtr_rts(struct tty_port *port, bool active) 655 { 656 struct acm *acm = container_of(port, struct acm, port); 657 int val; 658 int res; 659 660 if (active) 661 val = USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS; 662 else 663 val = 0; 664 665 /* FIXME: add missing ctrlout locking throughout driver */ 666 acm->ctrlout = val; 667 668 res = acm_set_control(acm, val); 669 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 670 /* This is broken in too many devices to spam the logs */ 671 dev_dbg(&acm->control->dev, "failed to set dtr/rts\n"); 672 } 673 674 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 675 { 676 struct acm *acm = container_of(port, struct acm, port); 677 int retval = -ENODEV; 678 int i; 679 680 mutex_lock(&acm->mutex); 681 if (acm->disconnected) 682 goto disconnected; 683 684 retval = usb_autopm_get_interface(acm->control); 685 if (retval) 686 goto error_get_interface; 687 688 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 689 acm->control->needs_remote_wakeup = 1; 690 691 acm->ctrlurb->dev = acm->dev; 692 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 693 if (retval) { 694 dev_err(&acm->control->dev, 695 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 696 goto error_submit_urb; 697 } 698 699 acm_tty_set_termios(tty, NULL); 700 701 /* 702 * Unthrottle device in case the TTY was closed while throttled. 703 */ 704 clear_bit(ACM_THROTTLED, &acm->flags); 705 706 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 707 if (retval) 708 goto error_submit_read_urbs; 709 710 usb_autopm_put_interface(acm->control); 711 712 mutex_unlock(&acm->mutex); 713 714 return 0; 715 716 error_submit_read_urbs: 717 for (i = 0; i < acm->rx_buflimit; i++) 718 usb_kill_urb(acm->read_urbs[i]); 719 usb_kill_urb(acm->ctrlurb); 720 error_submit_urb: 721 usb_autopm_put_interface(acm->control); 722 error_get_interface: 723 disconnected: 724 mutex_unlock(&acm->mutex); 725 726 return usb_translate_errors(retval); 727 } 728 729 static void acm_port_destruct(struct tty_port *port) 730 { 731 struct acm *acm = container_of(port, struct acm, port); 732 733 if (acm->minor != ACM_MINOR_INVALID) 734 acm_release_minor(acm); 735 usb_put_intf(acm->control); 736 kfree(acm->country_codes); 737 kfree(acm); 738 } 739 740 static void acm_port_shutdown(struct tty_port *port) 741 { 742 struct acm *acm = container_of(port, struct acm, port); 743 struct urb *urb; 744 struct acm_wb *wb; 745 746 /* 747 * Need to grab write_lock to prevent race with resume, but no need to 748 * hold it due to the tty-port initialised flag. 749 */ 750 acm_poison_urbs(acm); 751 spin_lock_irq(&acm->write_lock); 752 spin_unlock_irq(&acm->write_lock); 753 754 usb_autopm_get_interface_no_resume(acm->control); 755 acm->control->needs_remote_wakeup = 0; 756 usb_autopm_put_interface(acm->control); 757 758 for (;;) { 759 urb = usb_get_from_anchor(&acm->delayed); 760 if (!urb) 761 break; 762 wb = urb->context; 763 wb->use = false; 764 usb_autopm_put_interface_async(acm->control); 765 } 766 767 acm_unpoison_urbs(acm); 768 769 } 770 771 static void acm_tty_cleanup(struct tty_struct *tty) 772 { 773 struct acm *acm = tty->driver_data; 774 775 tty_port_put(&acm->port); 776 } 777 778 static void acm_tty_hangup(struct tty_struct *tty) 779 { 780 struct acm *acm = tty->driver_data; 781 782 tty_port_hangup(&acm->port); 783 } 784 785 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 786 { 787 struct acm *acm = tty->driver_data; 788 789 tty_port_close(&acm->port, tty, filp); 790 } 791 792 static int acm_tty_write(struct tty_struct *tty, 793 const unsigned char *buf, int count) 794 { 795 struct acm *acm = tty->driver_data; 796 int stat; 797 unsigned long flags; 798 int wbn; 799 struct acm_wb *wb; 800 801 if (!count) 802 return 0; 803 804 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 805 806 spin_lock_irqsave(&acm->write_lock, flags); 807 wbn = acm_wb_alloc(acm); 808 if (wbn < 0) { 809 spin_unlock_irqrestore(&acm->write_lock, flags); 810 return 0; 811 } 812 wb = &acm->wb[wbn]; 813 814 if (!acm->dev) { 815 wb->use = false; 816 spin_unlock_irqrestore(&acm->write_lock, flags); 817 return -ENODEV; 818 } 819 820 count = (count > acm->writesize) ? acm->writesize : count; 821 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 822 memcpy(wb->buf, buf, count); 823 wb->len = count; 824 825 stat = usb_autopm_get_interface_async(acm->control); 826 if (stat) { 827 wb->use = false; 828 spin_unlock_irqrestore(&acm->write_lock, flags); 829 return stat; 830 } 831 832 if (acm->susp_count) { 833 usb_anchor_urb(wb->urb, &acm->delayed); 834 spin_unlock_irqrestore(&acm->write_lock, flags); 835 return count; 836 } 837 838 stat = acm_start_wb(acm, wb); 839 spin_unlock_irqrestore(&acm->write_lock, flags); 840 841 if (stat < 0) 842 return stat; 843 return count; 844 } 845 846 static unsigned int acm_tty_write_room(struct tty_struct *tty) 847 { 848 struct acm *acm = tty->driver_data; 849 /* 850 * Do not let the line discipline to know that we have a reserve, 851 * or it might get too enthusiastic. 852 */ 853 return acm_wb_is_avail(acm) ? acm->writesize : 0; 854 } 855 856 static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty) 857 { 858 struct acm *acm = tty->driver_data; 859 /* 860 * if the device was unplugged then any remaining characters fell out 861 * of the connector ;) 862 */ 863 if (acm->disconnected) 864 return 0; 865 /* 866 * This is inaccurate (overcounts), but it works. 867 */ 868 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 869 } 870 871 static void acm_tty_throttle(struct tty_struct *tty) 872 { 873 struct acm *acm = tty->driver_data; 874 875 set_bit(ACM_THROTTLED, &acm->flags); 876 } 877 878 static void acm_tty_unthrottle(struct tty_struct *tty) 879 { 880 struct acm *acm = tty->driver_data; 881 882 clear_bit(ACM_THROTTLED, &acm->flags); 883 884 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 885 smp_mb(); 886 887 acm_submit_read_urbs(acm, GFP_KERNEL); 888 } 889 890 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 891 { 892 struct acm *acm = tty->driver_data; 893 int retval; 894 895 retval = acm_send_break(acm, state ? 0xffff : 0); 896 if (retval < 0) 897 dev_dbg(&acm->control->dev, 898 "%s - send break failed\n", __func__); 899 return retval; 900 } 901 902 static int acm_tty_tiocmget(struct tty_struct *tty) 903 { 904 struct acm *acm = tty->driver_data; 905 906 return (acm->ctrlout & USB_CDC_CTRL_DTR ? TIOCM_DTR : 0) | 907 (acm->ctrlout & USB_CDC_CTRL_RTS ? TIOCM_RTS : 0) | 908 (acm->ctrlin & USB_CDC_SERIAL_STATE_DSR ? TIOCM_DSR : 0) | 909 (acm->ctrlin & USB_CDC_SERIAL_STATE_RING_SIGNAL ? TIOCM_RI : 0) | 910 (acm->ctrlin & USB_CDC_SERIAL_STATE_DCD ? TIOCM_CD : 0) | 911 TIOCM_CTS; 912 } 913 914 static int acm_tty_tiocmset(struct tty_struct *tty, 915 unsigned int set, unsigned int clear) 916 { 917 struct acm *acm = tty->driver_data; 918 unsigned int newctrl; 919 920 newctrl = acm->ctrlout; 921 set = (set & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 922 (set & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 923 clear = (clear & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 924 (clear & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 925 926 newctrl = (newctrl & ~clear) | set; 927 928 if (acm->ctrlout == newctrl) 929 return 0; 930 return acm_set_control(acm, acm->ctrlout = newctrl); 931 } 932 933 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 934 { 935 struct acm *acm = tty->driver_data; 936 937 ss->line = acm->minor; 938 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 939 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 940 ASYNC_CLOSING_WAIT_NONE : 941 jiffies_to_msecs(acm->port.closing_wait) / 10; 942 return 0; 943 } 944 945 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 946 { 947 struct acm *acm = tty->driver_data; 948 unsigned int closing_wait, close_delay; 949 int retval = 0; 950 951 close_delay = msecs_to_jiffies(ss->close_delay * 10); 952 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 953 ASYNC_CLOSING_WAIT_NONE : 954 msecs_to_jiffies(ss->closing_wait * 10); 955 956 mutex_lock(&acm->port.mutex); 957 958 if (!capable(CAP_SYS_ADMIN)) { 959 if ((close_delay != acm->port.close_delay) || 960 (closing_wait != acm->port.closing_wait)) 961 retval = -EPERM; 962 } else { 963 acm->port.close_delay = close_delay; 964 acm->port.closing_wait = closing_wait; 965 } 966 967 mutex_unlock(&acm->port.mutex); 968 return retval; 969 } 970 971 static int wait_serial_change(struct acm *acm, unsigned long arg) 972 { 973 int rv = 0; 974 DECLARE_WAITQUEUE(wait, current); 975 struct async_icount old, new; 976 977 do { 978 spin_lock_irq(&acm->read_lock); 979 old = acm->oldcount; 980 new = acm->iocount; 981 acm->oldcount = new; 982 spin_unlock_irq(&acm->read_lock); 983 984 if ((arg & TIOCM_DSR) && 985 old.dsr != new.dsr) 986 break; 987 if ((arg & TIOCM_CD) && 988 old.dcd != new.dcd) 989 break; 990 if ((arg & TIOCM_RI) && 991 old.rng != new.rng) 992 break; 993 994 add_wait_queue(&acm->wioctl, &wait); 995 set_current_state(TASK_INTERRUPTIBLE); 996 schedule(); 997 remove_wait_queue(&acm->wioctl, &wait); 998 if (acm->disconnected) { 999 if (arg & TIOCM_CD) 1000 break; 1001 else 1002 rv = -ENODEV; 1003 } else { 1004 if (signal_pending(current)) 1005 rv = -ERESTARTSYS; 1006 } 1007 } while (!rv); 1008 1009 1010 1011 return rv; 1012 } 1013 1014 static int acm_tty_get_icount(struct tty_struct *tty, 1015 struct serial_icounter_struct *icount) 1016 { 1017 struct acm *acm = tty->driver_data; 1018 1019 icount->dsr = acm->iocount.dsr; 1020 icount->rng = acm->iocount.rng; 1021 icount->dcd = acm->iocount.dcd; 1022 icount->frame = acm->iocount.frame; 1023 icount->overrun = acm->iocount.overrun; 1024 icount->parity = acm->iocount.parity; 1025 icount->brk = acm->iocount.brk; 1026 1027 return 0; 1028 } 1029 1030 static int acm_tty_ioctl(struct tty_struct *tty, 1031 unsigned int cmd, unsigned long arg) 1032 { 1033 struct acm *acm = tty->driver_data; 1034 int rv = -ENOIOCTLCMD; 1035 1036 switch (cmd) { 1037 case TIOCMIWAIT: 1038 rv = usb_autopm_get_interface(acm->control); 1039 if (rv < 0) { 1040 rv = -EIO; 1041 break; 1042 } 1043 rv = wait_serial_change(acm, arg); 1044 usb_autopm_put_interface(acm->control); 1045 break; 1046 } 1047 1048 return rv; 1049 } 1050 1051 static void acm_tty_set_termios(struct tty_struct *tty, 1052 const struct ktermios *termios_old) 1053 { 1054 struct acm *acm = tty->driver_data; 1055 struct ktermios *termios = &tty->termios; 1056 struct usb_cdc_line_coding newline; 1057 int newctrl = acm->ctrlout; 1058 1059 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1060 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1061 newline.bParityType = termios->c_cflag & PARENB ? 1062 (termios->c_cflag & PARODD ? 1 : 2) + 1063 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1064 newline.bDataBits = tty_get_char_size(termios->c_cflag); 1065 1066 /* FIXME: Needs to clear unsupported bits in the termios */ 1067 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1068 1069 if (C_BAUD(tty) == B0) { 1070 newline.dwDTERate = acm->line.dwDTERate; 1071 newctrl &= ~USB_CDC_CTRL_DTR; 1072 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1073 newctrl |= USB_CDC_CTRL_DTR; 1074 } 1075 1076 if (newctrl != acm->ctrlout) 1077 acm_set_control(acm, acm->ctrlout = newctrl); 1078 1079 if (memcmp(&acm->line, &newline, sizeof newline)) { 1080 memcpy(&acm->line, &newline, sizeof newline); 1081 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1082 __func__, 1083 le32_to_cpu(newline.dwDTERate), 1084 newline.bCharFormat, newline.bParityType, 1085 newline.bDataBits); 1086 acm_set_line(acm, &acm->line); 1087 } 1088 } 1089 1090 static const struct tty_port_operations acm_port_ops = { 1091 .dtr_rts = acm_port_dtr_rts, 1092 .shutdown = acm_port_shutdown, 1093 .activate = acm_port_activate, 1094 .destruct = acm_port_destruct, 1095 }; 1096 1097 /* 1098 * USB probe and disconnect routines. 1099 */ 1100 1101 /* Little helpers: write/read buffers free */ 1102 static void acm_write_buffers_free(struct acm *acm) 1103 { 1104 int i; 1105 struct acm_wb *wb; 1106 1107 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1108 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1109 } 1110 1111 static void acm_read_buffers_free(struct acm *acm) 1112 { 1113 int i; 1114 1115 for (i = 0; i < acm->rx_buflimit; i++) 1116 usb_free_coherent(acm->dev, acm->readsize, 1117 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1118 } 1119 1120 /* Little helper: write buffers allocate */ 1121 static int acm_write_buffers_alloc(struct acm *acm) 1122 { 1123 int i; 1124 struct acm_wb *wb; 1125 1126 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1127 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1128 &wb->dmah); 1129 if (!wb->buf) { 1130 while (i != 0) { 1131 --i; 1132 --wb; 1133 usb_free_coherent(acm->dev, acm->writesize, 1134 wb->buf, wb->dmah); 1135 } 1136 return -ENOMEM; 1137 } 1138 } 1139 return 0; 1140 } 1141 1142 static int acm_probe(struct usb_interface *intf, 1143 const struct usb_device_id *id) 1144 { 1145 struct usb_cdc_union_desc *union_header = NULL; 1146 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1147 unsigned char *buffer = intf->altsetting->extra; 1148 int buflen = intf->altsetting->extralen; 1149 struct usb_interface *control_interface; 1150 struct usb_interface *data_interface; 1151 struct usb_endpoint_descriptor *epctrl = NULL; 1152 struct usb_endpoint_descriptor *epread = NULL; 1153 struct usb_endpoint_descriptor *epwrite = NULL; 1154 struct usb_device *usb_dev = interface_to_usbdev(intf); 1155 struct usb_cdc_parsed_header h; 1156 struct acm *acm; 1157 int minor; 1158 int ctrlsize, readsize; 1159 u8 *buf; 1160 int call_intf_num = -1; 1161 int data_intf_num = -1; 1162 unsigned long quirks; 1163 int num_rx_buf; 1164 int i; 1165 int combined_interfaces = 0; 1166 struct device *tty_dev; 1167 int rv = -ENOMEM; 1168 int res; 1169 1170 /* normal quirks */ 1171 quirks = (unsigned long)id->driver_info; 1172 1173 if (quirks == IGNORE_DEVICE) 1174 return -ENODEV; 1175 1176 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1177 1178 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1179 1180 /* handle quirks deadly to normal probing*/ 1181 if (quirks == NO_UNION_NORMAL) { 1182 data_interface = usb_ifnum_to_if(usb_dev, 1); 1183 control_interface = usb_ifnum_to_if(usb_dev, 0); 1184 /* we would crash */ 1185 if (!data_interface || !control_interface) 1186 return -ENODEV; 1187 goto skip_normal_probe; 1188 } 1189 1190 /* normal probing*/ 1191 if (!buffer) { 1192 dev_err(&intf->dev, "Weird descriptor references\n"); 1193 return -EINVAL; 1194 } 1195 1196 if (!buflen) { 1197 if (intf->cur_altsetting->endpoint && 1198 intf->cur_altsetting->endpoint->extralen && 1199 intf->cur_altsetting->endpoint->extra) { 1200 dev_dbg(&intf->dev, 1201 "Seeking extra descriptors on endpoint\n"); 1202 buflen = intf->cur_altsetting->endpoint->extralen; 1203 buffer = intf->cur_altsetting->endpoint->extra; 1204 } else { 1205 dev_err(&intf->dev, 1206 "Zero length descriptor references\n"); 1207 return -EINVAL; 1208 } 1209 } 1210 1211 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1212 union_header = h.usb_cdc_union_desc; 1213 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1214 if (cmgmd) 1215 call_intf_num = cmgmd->bDataInterface; 1216 1217 if (!union_header) { 1218 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1219 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1220 combined_interfaces = 1; 1221 control_interface = data_interface = intf; 1222 goto look_for_collapsed_interface; 1223 } else if (call_intf_num > 0) { 1224 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1225 data_intf_num = call_intf_num; 1226 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1227 control_interface = intf; 1228 } else { 1229 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1230 return -ENODEV; 1231 } 1232 } else { 1233 int class = -1; 1234 1235 data_intf_num = union_header->bSlaveInterface0; 1236 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1237 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1238 1239 if (control_interface) 1240 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1241 1242 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1243 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1244 combined_interfaces = 1; 1245 control_interface = data_interface = intf; 1246 goto look_for_collapsed_interface; 1247 } 1248 } 1249 1250 if (!control_interface || !data_interface) { 1251 dev_dbg(&intf->dev, "no interfaces\n"); 1252 return -ENODEV; 1253 } 1254 1255 if (data_intf_num != call_intf_num) 1256 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1257 1258 if (control_interface == data_interface) { 1259 /* some broken devices designed for windows work this way */ 1260 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1261 combined_interfaces = 1; 1262 /* a popular other OS doesn't use it */ 1263 quirks |= NO_CAP_LINE; 1264 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1265 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1266 return -EINVAL; 1267 } 1268 look_for_collapsed_interface: 1269 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1270 &epread, &epwrite, &epctrl, NULL); 1271 if (res) 1272 return res; 1273 1274 goto made_compressed_probe; 1275 } 1276 1277 skip_normal_probe: 1278 1279 /*workaround for switched interfaces */ 1280 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1281 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1282 dev_dbg(&intf->dev, 1283 "Your device has switched interfaces.\n"); 1284 swap(control_interface, data_interface); 1285 } else { 1286 return -EINVAL; 1287 } 1288 } 1289 1290 /* Accept probe requests only for the control interface */ 1291 if (!combined_interfaces && intf != control_interface) 1292 return -ENODEV; 1293 1294 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1295 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1296 return -EINVAL; 1297 1298 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1299 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1300 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1301 1302 1303 /* workaround for switched endpoints */ 1304 if (!usb_endpoint_dir_in(epread)) { 1305 /* descriptors are swapped */ 1306 dev_dbg(&intf->dev, 1307 "The data interface has switched endpoints\n"); 1308 swap(epread, epwrite); 1309 } 1310 made_compressed_probe: 1311 dev_dbg(&intf->dev, "interfaces are valid\n"); 1312 1313 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1314 if (!acm) 1315 return -ENOMEM; 1316 1317 tty_port_init(&acm->port); 1318 acm->port.ops = &acm_port_ops; 1319 1320 ctrlsize = usb_endpoint_maxp(epctrl); 1321 readsize = usb_endpoint_maxp(epread) * 1322 (quirks == SINGLE_RX_URB ? 1 : 2); 1323 acm->combined_interfaces = combined_interfaces; 1324 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1325 acm->control = control_interface; 1326 acm->data = data_interface; 1327 1328 usb_get_intf(acm->control); /* undone in destruct() */ 1329 1330 minor = acm_alloc_minor(acm); 1331 if (minor < 0) { 1332 acm->minor = ACM_MINOR_INVALID; 1333 goto err_put_port; 1334 } 1335 1336 acm->minor = minor; 1337 acm->dev = usb_dev; 1338 if (h.usb_cdc_acm_descriptor) 1339 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1340 if (quirks & NO_CAP_LINE) 1341 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1342 acm->ctrlsize = ctrlsize; 1343 acm->readsize = readsize; 1344 acm->rx_buflimit = num_rx_buf; 1345 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1346 init_waitqueue_head(&acm->wioctl); 1347 spin_lock_init(&acm->write_lock); 1348 spin_lock_init(&acm->read_lock); 1349 mutex_init(&acm->mutex); 1350 if (usb_endpoint_xfer_int(epread)) { 1351 acm->bInterval = epread->bInterval; 1352 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1353 } else { 1354 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1355 } 1356 if (usb_endpoint_xfer_int(epwrite)) 1357 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1358 else 1359 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1360 init_usb_anchor(&acm->delayed); 1361 acm->quirks = quirks; 1362 1363 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1364 if (!buf) 1365 goto err_put_port; 1366 acm->ctrl_buffer = buf; 1367 1368 if (acm_write_buffers_alloc(acm) < 0) 1369 goto err_free_ctrl_buffer; 1370 1371 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1372 if (!acm->ctrlurb) 1373 goto err_free_write_buffers; 1374 1375 for (i = 0; i < num_rx_buf; i++) { 1376 struct acm_rb *rb = &(acm->read_buffers[i]); 1377 struct urb *urb; 1378 1379 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1380 &rb->dma); 1381 if (!rb->base) 1382 goto err_free_read_urbs; 1383 rb->index = i; 1384 rb->instance = acm; 1385 1386 urb = usb_alloc_urb(0, GFP_KERNEL); 1387 if (!urb) 1388 goto err_free_read_urbs; 1389 1390 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1391 urb->transfer_dma = rb->dma; 1392 if (usb_endpoint_xfer_int(epread)) 1393 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1394 acm->readsize, 1395 acm_read_bulk_callback, rb, 1396 acm->bInterval); 1397 else 1398 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1399 acm->readsize, 1400 acm_read_bulk_callback, rb); 1401 1402 acm->read_urbs[i] = urb; 1403 __set_bit(i, &acm->read_urbs_free); 1404 } 1405 for (i = 0; i < ACM_NW; i++) { 1406 struct acm_wb *snd = &(acm->wb[i]); 1407 1408 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1409 if (!snd->urb) 1410 goto err_free_write_urbs; 1411 1412 if (usb_endpoint_xfer_int(epwrite)) 1413 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1414 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1415 else 1416 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1417 NULL, acm->writesize, acm_write_bulk, snd); 1418 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1419 if (quirks & SEND_ZERO_PACKET) 1420 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1421 snd->instance = acm; 1422 } 1423 1424 usb_set_intfdata(intf, acm); 1425 1426 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1427 if (i < 0) 1428 goto err_free_write_urbs; 1429 1430 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1431 struct usb_cdc_country_functional_desc * cfd = 1432 h.usb_cdc_country_functional_desc; 1433 1434 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1435 if (!acm->country_codes) 1436 goto skip_countries; 1437 acm->country_code_size = cfd->bLength - 4; 1438 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1439 cfd->bLength - 4); 1440 acm->country_rel_date = cfd->iCountryCodeRelDate; 1441 1442 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1443 if (i < 0) { 1444 kfree(acm->country_codes); 1445 acm->country_codes = NULL; 1446 acm->country_code_size = 0; 1447 goto skip_countries; 1448 } 1449 1450 i = device_create_file(&intf->dev, 1451 &dev_attr_iCountryCodeRelDate); 1452 if (i < 0) { 1453 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1454 kfree(acm->country_codes); 1455 acm->country_codes = NULL; 1456 acm->country_code_size = 0; 1457 goto skip_countries; 1458 } 1459 } 1460 1461 skip_countries: 1462 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1463 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1464 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1465 /* works around buggy devices */ 1466 epctrl->bInterval ? epctrl->bInterval : 16); 1467 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1468 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1469 acm->notification_buffer = NULL; 1470 acm->nb_index = 0; 1471 acm->nb_size = 0; 1472 1473 acm->line.dwDTERate = cpu_to_le32(9600); 1474 acm->line.bDataBits = 8; 1475 acm_set_line(acm, &acm->line); 1476 1477 if (!acm->combined_interfaces) { 1478 rv = usb_driver_claim_interface(&acm_driver, data_interface, acm); 1479 if (rv) 1480 goto err_remove_files; 1481 } 1482 1483 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1484 &control_interface->dev); 1485 if (IS_ERR(tty_dev)) { 1486 rv = PTR_ERR(tty_dev); 1487 goto err_release_data_interface; 1488 } 1489 1490 if (quirks & CLEAR_HALT_CONDITIONS) { 1491 usb_clear_halt(usb_dev, acm->in); 1492 usb_clear_halt(usb_dev, acm->out); 1493 } 1494 1495 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1496 1497 return 0; 1498 1499 err_release_data_interface: 1500 if (!acm->combined_interfaces) { 1501 /* Clear driver data so that disconnect() returns early. */ 1502 usb_set_intfdata(data_interface, NULL); 1503 usb_driver_release_interface(&acm_driver, data_interface); 1504 } 1505 err_remove_files: 1506 if (acm->country_codes) { 1507 device_remove_file(&acm->control->dev, 1508 &dev_attr_wCountryCodes); 1509 device_remove_file(&acm->control->dev, 1510 &dev_attr_iCountryCodeRelDate); 1511 } 1512 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1513 err_free_write_urbs: 1514 for (i = 0; i < ACM_NW; i++) 1515 usb_free_urb(acm->wb[i].urb); 1516 err_free_read_urbs: 1517 for (i = 0; i < num_rx_buf; i++) 1518 usb_free_urb(acm->read_urbs[i]); 1519 acm_read_buffers_free(acm); 1520 usb_free_urb(acm->ctrlurb); 1521 err_free_write_buffers: 1522 acm_write_buffers_free(acm); 1523 err_free_ctrl_buffer: 1524 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1525 err_put_port: 1526 tty_port_put(&acm->port); 1527 1528 return rv; 1529 } 1530 1531 static void acm_disconnect(struct usb_interface *intf) 1532 { 1533 struct acm *acm = usb_get_intfdata(intf); 1534 struct tty_struct *tty; 1535 int i; 1536 1537 /* sibling interface is already cleaning up */ 1538 if (!acm) 1539 return; 1540 1541 acm->disconnected = true; 1542 /* 1543 * there is a circular dependency. acm_softint() can resubmit 1544 * the URBs in error handling so we need to block any 1545 * submission right away 1546 */ 1547 acm_poison_urbs(acm); 1548 mutex_lock(&acm->mutex); 1549 if (acm->country_codes) { 1550 device_remove_file(&acm->control->dev, 1551 &dev_attr_wCountryCodes); 1552 device_remove_file(&acm->control->dev, 1553 &dev_attr_iCountryCodeRelDate); 1554 } 1555 wake_up_all(&acm->wioctl); 1556 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1557 usb_set_intfdata(acm->control, NULL); 1558 usb_set_intfdata(acm->data, NULL); 1559 mutex_unlock(&acm->mutex); 1560 1561 tty = tty_port_tty_get(&acm->port); 1562 if (tty) { 1563 tty_vhangup(tty); 1564 tty_kref_put(tty); 1565 } 1566 1567 cancel_delayed_work_sync(&acm->dwork); 1568 1569 tty_unregister_device(acm_tty_driver, acm->minor); 1570 1571 usb_free_urb(acm->ctrlurb); 1572 for (i = 0; i < ACM_NW; i++) 1573 usb_free_urb(acm->wb[i].urb); 1574 for (i = 0; i < acm->rx_buflimit; i++) 1575 usb_free_urb(acm->read_urbs[i]); 1576 acm_write_buffers_free(acm); 1577 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1578 acm_read_buffers_free(acm); 1579 1580 kfree(acm->notification_buffer); 1581 1582 if (!acm->combined_interfaces) 1583 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1584 acm->data : acm->control); 1585 1586 tty_port_put(&acm->port); 1587 } 1588 1589 #ifdef CONFIG_PM 1590 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1591 { 1592 struct acm *acm = usb_get_intfdata(intf); 1593 int cnt; 1594 1595 spin_lock_irq(&acm->write_lock); 1596 if (PMSG_IS_AUTO(message)) { 1597 if (acm->transmitting) { 1598 spin_unlock_irq(&acm->write_lock); 1599 return -EBUSY; 1600 } 1601 } 1602 cnt = acm->susp_count++; 1603 spin_unlock_irq(&acm->write_lock); 1604 1605 if (cnt) 1606 return 0; 1607 1608 acm_poison_urbs(acm); 1609 cancel_delayed_work_sync(&acm->dwork); 1610 acm->urbs_in_error_delay = 0; 1611 1612 return 0; 1613 } 1614 1615 static int acm_resume(struct usb_interface *intf) 1616 { 1617 struct acm *acm = usb_get_intfdata(intf); 1618 struct urb *urb; 1619 int rv = 0; 1620 1621 spin_lock_irq(&acm->write_lock); 1622 1623 if (--acm->susp_count) 1624 goto out; 1625 1626 acm_unpoison_urbs(acm); 1627 1628 if (tty_port_initialized(&acm->port)) { 1629 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1630 1631 for (;;) { 1632 urb = usb_get_from_anchor(&acm->delayed); 1633 if (!urb) 1634 break; 1635 1636 acm_start_wb(acm, urb->context); 1637 } 1638 1639 /* 1640 * delayed error checking because we must 1641 * do the write path at all cost 1642 */ 1643 if (rv < 0) 1644 goto out; 1645 1646 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1647 } 1648 out: 1649 spin_unlock_irq(&acm->write_lock); 1650 1651 return rv; 1652 } 1653 1654 static int acm_reset_resume(struct usb_interface *intf) 1655 { 1656 struct acm *acm = usb_get_intfdata(intf); 1657 1658 if (tty_port_initialized(&acm->port)) 1659 tty_port_tty_hangup(&acm->port, false); 1660 1661 return acm_resume(intf); 1662 } 1663 1664 #endif /* CONFIG_PM */ 1665 1666 static int acm_pre_reset(struct usb_interface *intf) 1667 { 1668 struct acm *acm = usb_get_intfdata(intf); 1669 1670 clear_bit(EVENT_RX_STALL, &acm->flags); 1671 acm->nb_index = 0; /* pending control transfers are lost */ 1672 1673 return 0; 1674 } 1675 1676 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1677 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1678 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1679 USB_CDC_ACM_PROTO_VENDOR) 1680 1681 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1682 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1683 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1684 USB_CDC_ACM_PROTO_VENDOR) 1685 1686 /* 1687 * USB driver structure. 1688 */ 1689 1690 static const struct usb_device_id acm_ids[] = { 1691 /* quirky and broken devices */ 1692 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1693 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1694 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1695 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1696 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1697 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1698 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1699 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1700 }, 1701 { USB_DEVICE(0x045b, 0x023c), /* Renesas USB Download mode */ 1702 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1703 }, 1704 { USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */ 1705 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1706 }, 1707 { USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */ 1708 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1709 }, 1710 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1711 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1712 }, 1713 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1714 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1715 }, 1716 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1717 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1718 }, 1719 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1720 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1721 }, 1722 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1723 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1724 }, 1725 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1726 .driver_info = SINGLE_RX_URB, 1727 }, 1728 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1729 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1730 }, 1731 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1732 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1733 }, 1734 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1735 .driver_info = SINGLE_RX_URB, 1736 }, 1737 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1738 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1739 }, 1740 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1741 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1742 }, 1743 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1744 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1745 }, 1746 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1747 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1748 }, 1749 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1750 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1751 }, 1752 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1753 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1754 }, 1755 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1756 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1757 }, 1758 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1759 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1760 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1761 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1762 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1763 }, 1764 /* Motorola H24 HSPA module: */ 1765 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1766 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1767 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1768 }, 1769 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1770 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1771 }, 1772 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1773 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1774 }, 1775 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1776 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1777 }, 1778 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1779 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1780 }, 1781 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1782 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1783 }, 1784 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1785 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1786 }, 1787 1788 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1789 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1790 data interface instead of 1791 communications interface. 1792 Maybe we should define a new 1793 quirk for this. */ 1794 }, 1795 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1796 .driver_info = NO_UNION_NORMAL, 1797 }, 1798 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1799 .driver_info = NO_UNION_NORMAL, 1800 }, 1801 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1802 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1803 }, 1804 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1805 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1806 }, 1807 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1808 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1809 }, 1810 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1811 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1812 }, 1813 { USB_DEVICE(0x0c26, 0x0020), /* Icom ICF3400 Serie */ 1814 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1815 }, 1816 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1817 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1818 }, 1819 1820 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1821 .driver_info = CLEAR_HALT_CONDITIONS, 1822 }, 1823 1824 /* Nokia S60 phones expose two ACM channels. The first is 1825 * a modem and is picked up by the standard AT-command 1826 * information below. The second is 'vendor-specific' but 1827 * is treated as a serial device at the S60 end, so we want 1828 * to expose it on Linux too. */ 1829 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1830 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1885 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1886 1887 /* Support for Owen devices */ 1888 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1889 1890 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1891 1892 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1893 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1894 .driver_info = IGNORE_DEVICE, 1895 }, 1896 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1897 .driver_info = IGNORE_DEVICE, 1898 }, 1899 #endif 1900 1901 #if IS_ENABLED(CONFIG_IR_TOY) 1902 { USB_DEVICE(0x04d8, 0xfd08), 1903 .driver_info = IGNORE_DEVICE, 1904 }, 1905 1906 { USB_DEVICE(0x04d8, 0xf58b), 1907 .driver_info = IGNORE_DEVICE, 1908 }, 1909 #endif 1910 1911 #if IS_ENABLED(CONFIG_USB_SERIAL_XR) 1912 { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE }, 1913 { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE }, 1914 { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE }, 1915 { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE }, 1916 { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE }, 1917 { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE }, 1918 { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE }, 1919 { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE }, 1920 { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE }, 1921 { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE }, 1922 { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE }, 1923 #endif 1924 1925 /*Samsung phone in firmware update mode */ 1926 { USB_DEVICE(0x04e8, 0x685d), 1927 .driver_info = IGNORE_DEVICE, 1928 }, 1929 1930 /* Exclude Infineon Flash Loader utility */ 1931 { USB_DEVICE(0x058b, 0x0041), 1932 .driver_info = IGNORE_DEVICE, 1933 }, 1934 1935 /* Exclude ETAS ES58x */ 1936 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 1937 .driver_info = IGNORE_DEVICE, 1938 }, 1939 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 1940 .driver_info = IGNORE_DEVICE, 1941 }, 1942 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 1943 .driver_info = IGNORE_DEVICE, 1944 }, 1945 1946 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1947 .driver_info = SEND_ZERO_PACKET, 1948 }, 1949 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1950 .driver_info = SEND_ZERO_PACKET, 1951 }, 1952 1953 /* Exclude Goodix Fingerprint Reader */ 1954 { USB_DEVICE(0x27c6, 0x5395), 1955 .driver_info = IGNORE_DEVICE, 1956 }, 1957 1958 /* Exclude Heimann Sensor GmbH USB appset demo */ 1959 { USB_DEVICE(0x32a7, 0x0000), 1960 .driver_info = IGNORE_DEVICE, 1961 }, 1962 1963 /* control interfaces without any protocol set */ 1964 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1965 USB_CDC_PROTO_NONE) }, 1966 1967 /* control interfaces with various AT-command sets */ 1968 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1969 USB_CDC_ACM_PROTO_AT_V25TER) }, 1970 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1971 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1972 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1973 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1974 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1975 USB_CDC_ACM_PROTO_AT_GSM) }, 1976 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1977 USB_CDC_ACM_PROTO_AT_3G) }, 1978 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1979 USB_CDC_ACM_PROTO_AT_CDMA) }, 1980 1981 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1982 .driver_info = SEND_ZERO_PACKET, 1983 }, 1984 1985 { } 1986 }; 1987 1988 MODULE_DEVICE_TABLE(usb, acm_ids); 1989 1990 static struct usb_driver acm_driver = { 1991 .name = "cdc_acm", 1992 .probe = acm_probe, 1993 .disconnect = acm_disconnect, 1994 #ifdef CONFIG_PM 1995 .suspend = acm_suspend, 1996 .resume = acm_resume, 1997 .reset_resume = acm_reset_resume, 1998 #endif 1999 .pre_reset = acm_pre_reset, 2000 .id_table = acm_ids, 2001 #ifdef CONFIG_PM 2002 .supports_autosuspend = 1, 2003 #endif 2004 .disable_hub_initiated_lpm = 1, 2005 }; 2006 2007 /* 2008 * TTY driver structures. 2009 */ 2010 2011 static const struct tty_operations acm_ops = { 2012 .install = acm_tty_install, 2013 .open = acm_tty_open, 2014 .close = acm_tty_close, 2015 .cleanup = acm_tty_cleanup, 2016 .hangup = acm_tty_hangup, 2017 .write = acm_tty_write, 2018 .write_room = acm_tty_write_room, 2019 .ioctl = acm_tty_ioctl, 2020 .throttle = acm_tty_throttle, 2021 .unthrottle = acm_tty_unthrottle, 2022 .chars_in_buffer = acm_tty_chars_in_buffer, 2023 .break_ctl = acm_tty_break_ctl, 2024 .set_termios = acm_tty_set_termios, 2025 .tiocmget = acm_tty_tiocmget, 2026 .tiocmset = acm_tty_tiocmset, 2027 .get_serial = get_serial_info, 2028 .set_serial = set_serial_info, 2029 .get_icount = acm_tty_get_icount, 2030 }; 2031 2032 /* 2033 * Init / exit. 2034 */ 2035 2036 static int __init acm_init(void) 2037 { 2038 int retval; 2039 acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW | 2040 TTY_DRIVER_DYNAMIC_DEV); 2041 if (IS_ERR(acm_tty_driver)) 2042 return PTR_ERR(acm_tty_driver); 2043 acm_tty_driver->driver_name = "acm", 2044 acm_tty_driver->name = "ttyACM", 2045 acm_tty_driver->major = ACM_TTY_MAJOR, 2046 acm_tty_driver->minor_start = 0, 2047 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2048 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2049 acm_tty_driver->init_termios = tty_std_termios; 2050 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2051 HUPCL | CLOCAL; 2052 tty_set_operations(acm_tty_driver, &acm_ops); 2053 2054 retval = tty_register_driver(acm_tty_driver); 2055 if (retval) { 2056 tty_driver_kref_put(acm_tty_driver); 2057 return retval; 2058 } 2059 2060 retval = usb_register(&acm_driver); 2061 if (retval) { 2062 tty_unregister_driver(acm_tty_driver); 2063 tty_driver_kref_put(acm_tty_driver); 2064 return retval; 2065 } 2066 2067 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2068 2069 return 0; 2070 } 2071 2072 static void __exit acm_exit(void) 2073 { 2074 usb_deregister(&acm_driver); 2075 tty_unregister_driver(acm_tty_driver); 2076 tty_driver_kref_put(acm_tty_driver); 2077 idr_destroy(&acm_minors); 2078 } 2079 2080 module_init(acm_init); 2081 module_exit(acm_exit); 2082 2083 MODULE_AUTHOR(DRIVER_AUTHOR); 2084 MODULE_DESCRIPTION(DRIVER_DESC); 2085 MODULE_LICENSE("GPL"); 2086 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2087