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 <asm/unaligned.h> 39 #include <linux/idr.h> 40 #include <linux/list.h> 41 42 #include "cdc-acm.h" 43 44 45 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 46 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 47 48 static struct usb_driver acm_driver; 49 static struct tty_driver *acm_tty_driver; 50 51 static DEFINE_IDR(acm_minors); 52 static DEFINE_MUTEX(acm_minors_lock); 53 54 static void acm_tty_set_termios(struct tty_struct *tty, 55 const struct ktermios *termios_old); 56 57 /* 58 * acm_minors accessors 59 */ 60 61 /* 62 * Look up an ACM structure by minor. If found and not disconnected, increment 63 * its refcount and return it with its mutex held. 64 */ 65 static struct acm *acm_get_by_minor(unsigned int minor) 66 { 67 struct acm *acm; 68 69 mutex_lock(&acm_minors_lock); 70 acm = idr_find(&acm_minors, minor); 71 if (acm) { 72 mutex_lock(&acm->mutex); 73 if (acm->disconnected) { 74 mutex_unlock(&acm->mutex); 75 acm = NULL; 76 } else { 77 tty_port_get(&acm->port); 78 mutex_unlock(&acm->mutex); 79 } 80 } 81 mutex_unlock(&acm_minors_lock); 82 return acm; 83 } 84 85 /* 86 * Try to find an available minor number and if found, associate it with 'acm'. 87 */ 88 static int acm_alloc_minor(struct acm *acm) 89 { 90 int minor; 91 92 mutex_lock(&acm_minors_lock); 93 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 94 mutex_unlock(&acm_minors_lock); 95 96 return minor; 97 } 98 99 /* Release the minor number associated with 'acm'. */ 100 static void acm_release_minor(struct acm *acm) 101 { 102 mutex_lock(&acm_minors_lock); 103 idr_remove(&acm_minors, acm->minor); 104 mutex_unlock(&acm_minors_lock); 105 } 106 107 /* 108 * Functions for ACM control messages. 109 */ 110 111 static int acm_ctrl_msg(struct acm *acm, int request, int value, 112 void *buf, int len) 113 { 114 int retval; 115 116 retval = usb_autopm_get_interface(acm->control); 117 if (retval) 118 return retval; 119 120 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 121 request, USB_RT_ACM, value, 122 acm->control->altsetting[0].desc.bInterfaceNumber, 123 buf, len, USB_CTRL_SET_TIMEOUT); 124 125 dev_dbg(&acm->control->dev, 126 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 127 __func__, request, value, len, retval); 128 129 usb_autopm_put_interface(acm->control); 130 131 return retval < 0 ? retval : 0; 132 } 133 134 /* devices aren't required to support these requests. 135 * the cdc acm descriptor tells whether they do... 136 */ 137 static inline int acm_set_control(struct acm *acm, int control) 138 { 139 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 140 return -EOPNOTSUPP; 141 142 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 143 control, NULL, 0); 144 } 145 146 #define acm_set_line(acm, line) \ 147 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 148 #define acm_send_break(acm, ms) \ 149 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 150 151 static void acm_poison_urbs(struct acm *acm) 152 { 153 int i; 154 155 usb_poison_urb(acm->ctrlurb); 156 for (i = 0; i < ACM_NW; i++) 157 usb_poison_urb(acm->wb[i].urb); 158 for (i = 0; i < acm->rx_buflimit; i++) 159 usb_poison_urb(acm->read_urbs[i]); 160 } 161 162 static void acm_unpoison_urbs(struct acm *acm) 163 { 164 int i; 165 166 for (i = 0; i < acm->rx_buflimit; i++) 167 usb_unpoison_urb(acm->read_urbs[i]); 168 for (i = 0; i < ACM_NW; i++) 169 usb_unpoison_urb(acm->wb[i].urb); 170 usb_unpoison_urb(acm->ctrlurb); 171 } 172 173 174 /* 175 * Write buffer management. 176 * All of these assume proper locks taken by the caller. 177 */ 178 179 static int acm_wb_alloc(struct acm *acm) 180 { 181 int i, wbn; 182 struct acm_wb *wb; 183 184 wbn = 0; 185 i = 0; 186 for (;;) { 187 wb = &acm->wb[wbn]; 188 if (!wb->use) { 189 wb->use = true; 190 wb->len = 0; 191 return wbn; 192 } 193 wbn = (wbn + 1) % ACM_NW; 194 if (++i >= ACM_NW) 195 return -1; 196 } 197 } 198 199 static int acm_wb_is_avail(struct acm *acm) 200 { 201 int i, n; 202 unsigned long flags; 203 204 n = ACM_NW; 205 spin_lock_irqsave(&acm->write_lock, flags); 206 for (i = 0; i < ACM_NW; i++) 207 if(acm->wb[i].use) 208 n--; 209 spin_unlock_irqrestore(&acm->write_lock, flags); 210 return n; 211 } 212 213 /* 214 * Finish write. Caller must hold acm->write_lock 215 */ 216 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 217 { 218 wb->use = false; 219 acm->transmitting--; 220 usb_autopm_put_interface_async(acm->control); 221 } 222 223 /* 224 * Poke write. 225 * 226 * the caller is responsible for locking 227 */ 228 229 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 230 { 231 int rc; 232 233 acm->transmitting++; 234 235 wb->urb->transfer_buffer = wb->buf; 236 wb->urb->transfer_dma = wb->dmah; 237 wb->urb->transfer_buffer_length = wb->len; 238 wb->urb->dev = acm->dev; 239 240 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 241 if (rc < 0) { 242 if (rc != -EPERM) 243 dev_err(&acm->data->dev, 244 "%s - usb_submit_urb(write bulk) failed: %d\n", 245 __func__, rc); 246 acm_write_done(acm, wb); 247 } 248 return rc; 249 } 250 251 /* 252 * attributes exported through sysfs 253 */ 254 static ssize_t bmCapabilities_show 255 (struct device *dev, struct device_attribute *attr, char *buf) 256 { 257 struct usb_interface *intf = to_usb_interface(dev); 258 struct acm *acm = usb_get_intfdata(intf); 259 260 return sprintf(buf, "%d", acm->ctrl_caps); 261 } 262 static DEVICE_ATTR_RO(bmCapabilities); 263 264 static ssize_t wCountryCodes_show 265 (struct device *dev, struct device_attribute *attr, char *buf) 266 { 267 struct usb_interface *intf = to_usb_interface(dev); 268 struct acm *acm = usb_get_intfdata(intf); 269 270 memcpy(buf, acm->country_codes, acm->country_code_size); 271 return acm->country_code_size; 272 } 273 274 static DEVICE_ATTR_RO(wCountryCodes); 275 276 static ssize_t iCountryCodeRelDate_show 277 (struct device *dev, struct device_attribute *attr, char *buf) 278 { 279 struct usb_interface *intf = to_usb_interface(dev); 280 struct acm *acm = usb_get_intfdata(intf); 281 282 return sprintf(buf, "%d", acm->country_rel_date); 283 } 284 285 static DEVICE_ATTR_RO(iCountryCodeRelDate); 286 /* 287 * Interrupt handlers for various ACM device responses 288 */ 289 290 static void acm_process_notification(struct acm *acm, unsigned char *buf) 291 { 292 int newctrl; 293 int difference; 294 unsigned long flags; 295 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 296 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 297 298 switch (dr->bNotificationType) { 299 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 300 dev_dbg(&acm->control->dev, 301 "%s - network connection: %d\n", __func__, dr->wValue); 302 break; 303 304 case USB_CDC_NOTIFY_SERIAL_STATE: 305 if (le16_to_cpu(dr->wLength) != 2) { 306 dev_dbg(&acm->control->dev, 307 "%s - malformed serial state\n", __func__); 308 break; 309 } 310 311 newctrl = get_unaligned_le16(data); 312 dev_dbg(&acm->control->dev, 313 "%s - serial state: 0x%x\n", __func__, newctrl); 314 315 if (!acm->clocal && (acm->ctrlin & ~newctrl & USB_CDC_SERIAL_STATE_DCD)) { 316 dev_dbg(&acm->control->dev, 317 "%s - calling hangup\n", __func__); 318 tty_port_tty_hangup(&acm->port, false); 319 } 320 321 difference = acm->ctrlin ^ newctrl; 322 323 if ((difference & USB_CDC_SERIAL_STATE_DCD) && acm->port.tty) { 324 struct tty_ldisc *ld = tty_ldisc_ref(acm->port.tty); 325 if (ld) { 326 if (ld->ops->dcd_change) 327 ld->ops->dcd_change(acm->port.tty, newctrl & USB_CDC_SERIAL_STATE_DCD); 328 tty_ldisc_deref(ld); 329 } 330 } 331 332 spin_lock_irqsave(&acm->read_lock, flags); 333 acm->ctrlin = newctrl; 334 acm->oldcount = acm->iocount; 335 336 if (difference & USB_CDC_SERIAL_STATE_DSR) 337 acm->iocount.dsr++; 338 if (difference & USB_CDC_SERIAL_STATE_DCD) 339 acm->iocount.dcd++; 340 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) { 341 acm->iocount.brk++; 342 tty_insert_flip_char(&acm->port, 0, TTY_BREAK); 343 } 344 if (newctrl & USB_CDC_SERIAL_STATE_RING_SIGNAL) 345 acm->iocount.rng++; 346 if (newctrl & USB_CDC_SERIAL_STATE_FRAMING) 347 acm->iocount.frame++; 348 if (newctrl & USB_CDC_SERIAL_STATE_PARITY) 349 acm->iocount.parity++; 350 if (newctrl & USB_CDC_SERIAL_STATE_OVERRUN) 351 acm->iocount.overrun++; 352 spin_unlock_irqrestore(&acm->read_lock, flags); 353 354 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) 355 tty_flip_buffer_push(&acm->port); 356 357 if (difference) 358 wake_up_all(&acm->wioctl); 359 360 break; 361 362 default: 363 dev_dbg(&acm->control->dev, 364 "%s - unknown notification %d received: index %d len %d\n", 365 __func__, 366 dr->bNotificationType, dr->wIndex, dr->wLength); 367 } 368 } 369 370 /* control interface reports status changes with "interrupt" transfers */ 371 static void acm_ctrl_irq(struct urb *urb) 372 { 373 struct acm *acm = urb->context; 374 struct usb_cdc_notification *dr = urb->transfer_buffer; 375 unsigned int current_size = urb->actual_length; 376 unsigned int expected_size, copy_size, alloc_size; 377 int retval; 378 int status = urb->status; 379 380 switch (status) { 381 case 0: 382 /* success */ 383 break; 384 case -ECONNRESET: 385 case -ENOENT: 386 case -ESHUTDOWN: 387 /* this urb is terminated, clean up */ 388 dev_dbg(&acm->control->dev, 389 "%s - urb shutting down with status: %d\n", 390 __func__, status); 391 return; 392 default: 393 dev_dbg(&acm->control->dev, 394 "%s - nonzero urb status received: %d\n", 395 __func__, status); 396 goto exit; 397 } 398 399 usb_mark_last_busy(acm->dev); 400 401 if (acm->nb_index) 402 dr = (struct usb_cdc_notification *)acm->notification_buffer; 403 404 /* size = notification-header + (optional) data */ 405 expected_size = sizeof(struct usb_cdc_notification) + 406 le16_to_cpu(dr->wLength); 407 408 if (current_size < expected_size) { 409 /* notification is transmitted fragmented, reassemble */ 410 if (acm->nb_size < expected_size) { 411 u8 *new_buffer; 412 alloc_size = roundup_pow_of_two(expected_size); 413 /* Final freeing is done on disconnect. */ 414 new_buffer = krealloc(acm->notification_buffer, 415 alloc_size, GFP_ATOMIC); 416 if (!new_buffer) { 417 acm->nb_index = 0; 418 goto exit; 419 } 420 421 acm->notification_buffer = new_buffer; 422 acm->nb_size = alloc_size; 423 dr = (struct usb_cdc_notification *)acm->notification_buffer; 424 } 425 426 copy_size = min(current_size, 427 expected_size - acm->nb_index); 428 429 memcpy(&acm->notification_buffer[acm->nb_index], 430 urb->transfer_buffer, copy_size); 431 acm->nb_index += copy_size; 432 current_size = acm->nb_index; 433 } 434 435 if (current_size >= expected_size) { 436 /* notification complete */ 437 acm_process_notification(acm, (unsigned char *)dr); 438 acm->nb_index = 0; 439 } 440 441 exit: 442 retval = usb_submit_urb(urb, GFP_ATOMIC); 443 if (retval && retval != -EPERM && retval != -ENODEV) 444 dev_err(&acm->control->dev, 445 "%s - usb_submit_urb failed: %d\n", __func__, retval); 446 else 447 dev_vdbg(&acm->control->dev, 448 "control resubmission terminated %d\n", retval); 449 } 450 451 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 452 { 453 int res; 454 455 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 456 return 0; 457 458 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 459 if (res) { 460 if (res != -EPERM && res != -ENODEV) { 461 dev_err(&acm->data->dev, 462 "urb %d failed submission with %d\n", 463 index, res); 464 } else { 465 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 466 } 467 set_bit(index, &acm->read_urbs_free); 468 return res; 469 } else { 470 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 471 } 472 473 return 0; 474 } 475 476 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 477 { 478 int res; 479 int i; 480 481 for (i = 0; i < acm->rx_buflimit; ++i) { 482 res = acm_submit_read_urb(acm, i, mem_flags); 483 if (res) 484 return res; 485 } 486 487 return 0; 488 } 489 490 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 491 { 492 unsigned long flags; 493 494 if (!urb->actual_length) 495 return; 496 497 spin_lock_irqsave(&acm->read_lock, flags); 498 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 499 urb->actual_length); 500 spin_unlock_irqrestore(&acm->read_lock, flags); 501 502 tty_flip_buffer_push(&acm->port); 503 } 504 505 static void acm_read_bulk_callback(struct urb *urb) 506 { 507 struct acm_rb *rb = urb->context; 508 struct acm *acm = rb->instance; 509 int status = urb->status; 510 bool stopped = false; 511 bool stalled = false; 512 bool cooldown = false; 513 514 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 515 rb->index, urb->actual_length, status); 516 517 switch (status) { 518 case 0: 519 usb_mark_last_busy(acm->dev); 520 acm_process_read_urb(acm, urb); 521 break; 522 case -EPIPE: 523 set_bit(EVENT_RX_STALL, &acm->flags); 524 stalled = true; 525 break; 526 case -ENOENT: 527 case -ECONNRESET: 528 case -ESHUTDOWN: 529 dev_dbg(&acm->data->dev, 530 "%s - urb shutting down with status: %d\n", 531 __func__, status); 532 stopped = true; 533 break; 534 case -EOVERFLOW: 535 case -EPROTO: 536 dev_dbg(&acm->data->dev, 537 "%s - cooling babbling device\n", __func__); 538 usb_mark_last_busy(acm->dev); 539 set_bit(rb->index, &acm->urbs_in_error_delay); 540 set_bit(ACM_ERROR_DELAY, &acm->flags); 541 cooldown = true; 542 break; 543 default: 544 dev_dbg(&acm->data->dev, 545 "%s - nonzero urb status received: %d\n", 546 __func__, status); 547 break; 548 } 549 550 /* 551 * Make sure URB processing is done before marking as free to avoid 552 * racing with unthrottle() on another CPU. Matches the barriers 553 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 554 */ 555 smp_mb__before_atomic(); 556 set_bit(rb->index, &acm->read_urbs_free); 557 /* 558 * Make sure URB is marked as free before checking the throttled flag 559 * to avoid racing with unthrottle() on another CPU. Matches the 560 * smp_mb() in unthrottle(). 561 */ 562 smp_mb__after_atomic(); 563 564 if (stopped || stalled || cooldown) { 565 if (stalled) 566 schedule_delayed_work(&acm->dwork, 0); 567 else if (cooldown) 568 schedule_delayed_work(&acm->dwork, HZ / 2); 569 return; 570 } 571 572 if (test_bit(ACM_THROTTLED, &acm->flags)) 573 return; 574 575 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 576 } 577 578 /* data interface wrote those outgoing bytes */ 579 static void acm_write_bulk(struct urb *urb) 580 { 581 struct acm_wb *wb = urb->context; 582 struct acm *acm = wb->instance; 583 unsigned long flags; 584 int status = urb->status; 585 586 if (status || (urb->actual_length != urb->transfer_buffer_length)) 587 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 588 urb->actual_length, 589 urb->transfer_buffer_length, 590 status); 591 592 spin_lock_irqsave(&acm->write_lock, flags); 593 acm_write_done(acm, wb); 594 spin_unlock_irqrestore(&acm->write_lock, flags); 595 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 596 schedule_delayed_work(&acm->dwork, 0); 597 } 598 599 static void acm_softint(struct work_struct *work) 600 { 601 int i; 602 struct acm *acm = container_of(work, struct acm, dwork.work); 603 604 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 605 smp_mb(); /* against acm_suspend() */ 606 if (!acm->susp_count) { 607 for (i = 0; i < acm->rx_buflimit; i++) 608 usb_kill_urb(acm->read_urbs[i]); 609 usb_clear_halt(acm->dev, acm->in); 610 acm_submit_read_urbs(acm, GFP_KERNEL); 611 clear_bit(EVENT_RX_STALL, &acm->flags); 612 } 613 } 614 615 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 616 for (i = 0; i < acm->rx_buflimit; i++) 617 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 618 acm_submit_read_urb(acm, i, GFP_KERNEL); 619 } 620 621 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 622 tty_port_tty_wakeup(&acm->port); 623 } 624 625 /* 626 * TTY handlers 627 */ 628 629 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 630 { 631 struct acm *acm; 632 int retval; 633 634 acm = acm_get_by_minor(tty->index); 635 if (!acm) 636 return -ENODEV; 637 638 retval = tty_standard_install(driver, tty); 639 if (retval) 640 goto error_init_termios; 641 642 /* 643 * Suppress initial echoing for some devices which might send data 644 * immediately after acm driver has been installed. 645 */ 646 if (acm->quirks & DISABLE_ECHO) 647 tty->termios.c_lflag &= ~ECHO; 648 649 tty->driver_data = acm; 650 651 return 0; 652 653 error_init_termios: 654 tty_port_put(&acm->port); 655 return retval; 656 } 657 658 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 659 { 660 struct acm *acm = tty->driver_data; 661 662 return tty_port_open(&acm->port, tty, filp); 663 } 664 665 static void acm_port_dtr_rts(struct tty_port *port, bool active) 666 { 667 struct acm *acm = container_of(port, struct acm, port); 668 int val; 669 int res; 670 671 if (active) 672 val = USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS; 673 else 674 val = 0; 675 676 /* FIXME: add missing ctrlout locking throughout driver */ 677 acm->ctrlout = val; 678 679 res = acm_set_control(acm, val); 680 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 681 /* This is broken in too many devices to spam the logs */ 682 dev_dbg(&acm->control->dev, "failed to set dtr/rts\n"); 683 } 684 685 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 686 { 687 struct acm *acm = container_of(port, struct acm, port); 688 int retval = -ENODEV; 689 int i; 690 691 mutex_lock(&acm->mutex); 692 if (acm->disconnected) 693 goto disconnected; 694 695 retval = usb_autopm_get_interface(acm->control); 696 if (retval) 697 goto error_get_interface; 698 699 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 700 acm->control->needs_remote_wakeup = 1; 701 702 acm->ctrlurb->dev = acm->dev; 703 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 704 if (retval) { 705 dev_err(&acm->control->dev, 706 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 707 goto error_submit_urb; 708 } 709 710 acm_tty_set_termios(tty, NULL); 711 712 /* 713 * Unthrottle device in case the TTY was closed while throttled. 714 */ 715 clear_bit(ACM_THROTTLED, &acm->flags); 716 717 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 718 if (retval) 719 goto error_submit_read_urbs; 720 721 usb_autopm_put_interface(acm->control); 722 723 mutex_unlock(&acm->mutex); 724 725 return 0; 726 727 error_submit_read_urbs: 728 for (i = 0; i < acm->rx_buflimit; i++) 729 usb_kill_urb(acm->read_urbs[i]); 730 usb_kill_urb(acm->ctrlurb); 731 error_submit_urb: 732 usb_autopm_put_interface(acm->control); 733 error_get_interface: 734 disconnected: 735 mutex_unlock(&acm->mutex); 736 737 return usb_translate_errors(retval); 738 } 739 740 static void acm_port_destruct(struct tty_port *port) 741 { 742 struct acm *acm = container_of(port, struct acm, port); 743 744 if (acm->minor != ACM_MINOR_INVALID) 745 acm_release_minor(acm); 746 usb_put_intf(acm->control); 747 kfree(acm->country_codes); 748 kfree(acm); 749 } 750 751 static void acm_port_shutdown(struct tty_port *port) 752 { 753 struct acm *acm = container_of(port, struct acm, port); 754 struct urb *urb; 755 struct acm_wb *wb; 756 757 /* 758 * Need to grab write_lock to prevent race with resume, but no need to 759 * hold it due to the tty-port initialised flag. 760 */ 761 acm_poison_urbs(acm); 762 spin_lock_irq(&acm->write_lock); 763 spin_unlock_irq(&acm->write_lock); 764 765 usb_autopm_get_interface_no_resume(acm->control); 766 acm->control->needs_remote_wakeup = 0; 767 usb_autopm_put_interface(acm->control); 768 769 for (;;) { 770 urb = usb_get_from_anchor(&acm->delayed); 771 if (!urb) 772 break; 773 wb = urb->context; 774 wb->use = false; 775 usb_autopm_put_interface_async(acm->control); 776 } 777 778 acm_unpoison_urbs(acm); 779 780 } 781 782 static void acm_tty_cleanup(struct tty_struct *tty) 783 { 784 struct acm *acm = tty->driver_data; 785 786 tty_port_put(&acm->port); 787 } 788 789 static void acm_tty_hangup(struct tty_struct *tty) 790 { 791 struct acm *acm = tty->driver_data; 792 793 tty_port_hangup(&acm->port); 794 } 795 796 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 797 { 798 struct acm *acm = tty->driver_data; 799 800 tty_port_close(&acm->port, tty, filp); 801 } 802 803 static ssize_t acm_tty_write(struct tty_struct *tty, const u8 *buf, 804 size_t count) 805 { 806 struct acm *acm = tty->driver_data; 807 int stat; 808 unsigned long flags; 809 int wbn; 810 struct acm_wb *wb; 811 812 if (!count) 813 return 0; 814 815 dev_vdbg(&acm->data->dev, "%zu bytes from tty layer\n", count); 816 817 spin_lock_irqsave(&acm->write_lock, flags); 818 wbn = acm_wb_alloc(acm); 819 if (wbn < 0) { 820 spin_unlock_irqrestore(&acm->write_lock, flags); 821 return 0; 822 } 823 wb = &acm->wb[wbn]; 824 825 if (!acm->dev) { 826 wb->use = false; 827 spin_unlock_irqrestore(&acm->write_lock, flags); 828 return -ENODEV; 829 } 830 831 count = (count > acm->writesize) ? acm->writesize : count; 832 dev_vdbg(&acm->data->dev, "writing %zu bytes\n", count); 833 memcpy(wb->buf, buf, count); 834 wb->len = count; 835 836 stat = usb_autopm_get_interface_async(acm->control); 837 if (stat) { 838 wb->use = false; 839 spin_unlock_irqrestore(&acm->write_lock, flags); 840 return stat; 841 } 842 843 if (acm->susp_count) { 844 usb_anchor_urb(wb->urb, &acm->delayed); 845 spin_unlock_irqrestore(&acm->write_lock, flags); 846 return count; 847 } 848 849 stat = acm_start_wb(acm, wb); 850 spin_unlock_irqrestore(&acm->write_lock, flags); 851 852 if (stat < 0) 853 return stat; 854 return count; 855 } 856 857 static unsigned int acm_tty_write_room(struct tty_struct *tty) 858 { 859 struct acm *acm = tty->driver_data; 860 /* 861 * Do not let the line discipline to know that we have a reserve, 862 * or it might get too enthusiastic. 863 */ 864 return acm_wb_is_avail(acm) ? acm->writesize : 0; 865 } 866 867 static void acm_tty_flush_buffer(struct tty_struct *tty) 868 { 869 struct acm *acm = tty->driver_data; 870 unsigned long flags; 871 int i; 872 873 spin_lock_irqsave(&acm->write_lock, flags); 874 for (i = 0; i < ACM_NW; i++) 875 if (acm->wb[i].use) 876 usb_unlink_urb(acm->wb[i].urb); 877 spin_unlock_irqrestore(&acm->write_lock, flags); 878 } 879 880 static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty) 881 { 882 struct acm *acm = tty->driver_data; 883 /* 884 * if the device was unplugged then any remaining characters fell out 885 * of the connector ;) 886 */ 887 if (acm->disconnected) 888 return 0; 889 /* 890 * This is inaccurate (overcounts), but it works. 891 */ 892 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 893 } 894 895 static void acm_tty_throttle(struct tty_struct *tty) 896 { 897 struct acm *acm = tty->driver_data; 898 899 set_bit(ACM_THROTTLED, &acm->flags); 900 } 901 902 static void acm_tty_unthrottle(struct tty_struct *tty) 903 { 904 struct acm *acm = tty->driver_data; 905 906 clear_bit(ACM_THROTTLED, &acm->flags); 907 908 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 909 smp_mb(); 910 911 acm_submit_read_urbs(acm, GFP_KERNEL); 912 } 913 914 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 915 { 916 struct acm *acm = tty->driver_data; 917 int retval; 918 919 if (!(acm->ctrl_caps & USB_CDC_CAP_BRK)) 920 return -EOPNOTSUPP; 921 922 retval = acm_send_break(acm, state ? 0xffff : 0); 923 if (retval < 0) 924 dev_dbg(&acm->control->dev, 925 "%s - send break failed\n", __func__); 926 return retval; 927 } 928 929 static int acm_tty_tiocmget(struct tty_struct *tty) 930 { 931 struct acm *acm = tty->driver_data; 932 933 return (acm->ctrlout & USB_CDC_CTRL_DTR ? TIOCM_DTR : 0) | 934 (acm->ctrlout & USB_CDC_CTRL_RTS ? TIOCM_RTS : 0) | 935 (acm->ctrlin & USB_CDC_SERIAL_STATE_DSR ? TIOCM_DSR : 0) | 936 (acm->ctrlin & USB_CDC_SERIAL_STATE_RING_SIGNAL ? TIOCM_RI : 0) | 937 (acm->ctrlin & USB_CDC_SERIAL_STATE_DCD ? TIOCM_CD : 0) | 938 TIOCM_CTS; 939 } 940 941 static int acm_tty_tiocmset(struct tty_struct *tty, 942 unsigned int set, unsigned int clear) 943 { 944 struct acm *acm = tty->driver_data; 945 unsigned int newctrl; 946 947 newctrl = acm->ctrlout; 948 set = (set & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 949 (set & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 950 clear = (clear & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 951 (clear & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 952 953 newctrl = (newctrl & ~clear) | set; 954 955 if (acm->ctrlout == newctrl) 956 return 0; 957 return acm_set_control(acm, acm->ctrlout = newctrl); 958 } 959 960 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 961 { 962 struct acm *acm = tty->driver_data; 963 964 ss->line = acm->minor; 965 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 966 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 967 ASYNC_CLOSING_WAIT_NONE : 968 jiffies_to_msecs(acm->port.closing_wait) / 10; 969 return 0; 970 } 971 972 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 973 { 974 struct acm *acm = tty->driver_data; 975 unsigned int closing_wait, close_delay; 976 int retval = 0; 977 978 close_delay = msecs_to_jiffies(ss->close_delay * 10); 979 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 980 ASYNC_CLOSING_WAIT_NONE : 981 msecs_to_jiffies(ss->closing_wait * 10); 982 983 mutex_lock(&acm->port.mutex); 984 985 if (!capable(CAP_SYS_ADMIN)) { 986 if ((close_delay != acm->port.close_delay) || 987 (closing_wait != acm->port.closing_wait)) 988 retval = -EPERM; 989 } else { 990 acm->port.close_delay = close_delay; 991 acm->port.closing_wait = closing_wait; 992 } 993 994 mutex_unlock(&acm->port.mutex); 995 return retval; 996 } 997 998 static int wait_serial_change(struct acm *acm, unsigned long arg) 999 { 1000 int rv = 0; 1001 DECLARE_WAITQUEUE(wait, current); 1002 struct async_icount old, new; 1003 1004 do { 1005 spin_lock_irq(&acm->read_lock); 1006 old = acm->oldcount; 1007 new = acm->iocount; 1008 acm->oldcount = new; 1009 spin_unlock_irq(&acm->read_lock); 1010 1011 if ((arg & TIOCM_DSR) && 1012 old.dsr != new.dsr) 1013 break; 1014 if ((arg & TIOCM_CD) && 1015 old.dcd != new.dcd) 1016 break; 1017 if ((arg & TIOCM_RI) && 1018 old.rng != new.rng) 1019 break; 1020 1021 add_wait_queue(&acm->wioctl, &wait); 1022 set_current_state(TASK_INTERRUPTIBLE); 1023 schedule(); 1024 remove_wait_queue(&acm->wioctl, &wait); 1025 if (acm->disconnected) { 1026 if (arg & TIOCM_CD) 1027 break; 1028 else 1029 rv = -ENODEV; 1030 } else { 1031 if (signal_pending(current)) 1032 rv = -ERESTARTSYS; 1033 } 1034 } while (!rv); 1035 1036 1037 1038 return rv; 1039 } 1040 1041 static int acm_tty_get_icount(struct tty_struct *tty, 1042 struct serial_icounter_struct *icount) 1043 { 1044 struct acm *acm = tty->driver_data; 1045 1046 icount->dsr = acm->iocount.dsr; 1047 icount->rng = acm->iocount.rng; 1048 icount->dcd = acm->iocount.dcd; 1049 icount->frame = acm->iocount.frame; 1050 icount->overrun = acm->iocount.overrun; 1051 icount->parity = acm->iocount.parity; 1052 icount->brk = acm->iocount.brk; 1053 1054 return 0; 1055 } 1056 1057 static int acm_tty_ioctl(struct tty_struct *tty, 1058 unsigned int cmd, unsigned long arg) 1059 { 1060 struct acm *acm = tty->driver_data; 1061 int rv = -ENOIOCTLCMD; 1062 1063 switch (cmd) { 1064 case TIOCMIWAIT: 1065 rv = usb_autopm_get_interface(acm->control); 1066 if (rv < 0) { 1067 rv = -EIO; 1068 break; 1069 } 1070 rv = wait_serial_change(acm, arg); 1071 usb_autopm_put_interface(acm->control); 1072 break; 1073 } 1074 1075 return rv; 1076 } 1077 1078 static void acm_tty_set_termios(struct tty_struct *tty, 1079 const struct ktermios *termios_old) 1080 { 1081 struct acm *acm = tty->driver_data; 1082 struct ktermios *termios = &tty->termios; 1083 struct usb_cdc_line_coding newline; 1084 int newctrl = acm->ctrlout; 1085 1086 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1087 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1088 newline.bParityType = termios->c_cflag & PARENB ? 1089 (termios->c_cflag & PARODD ? 1 : 2) + 1090 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1091 newline.bDataBits = tty_get_char_size(termios->c_cflag); 1092 1093 /* FIXME: Needs to clear unsupported bits in the termios */ 1094 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1095 1096 if (C_BAUD(tty) == B0) { 1097 newline.dwDTERate = acm->line.dwDTERate; 1098 newctrl &= ~USB_CDC_CTRL_DTR; 1099 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1100 newctrl |= USB_CDC_CTRL_DTR; 1101 } 1102 1103 if (newctrl != acm->ctrlout) 1104 acm_set_control(acm, acm->ctrlout = newctrl); 1105 1106 if (memcmp(&acm->line, &newline, sizeof newline)) { 1107 memcpy(&acm->line, &newline, sizeof newline); 1108 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1109 __func__, 1110 le32_to_cpu(newline.dwDTERate), 1111 newline.bCharFormat, newline.bParityType, 1112 newline.bDataBits); 1113 acm_set_line(acm, &acm->line); 1114 } 1115 } 1116 1117 static const struct tty_port_operations acm_port_ops = { 1118 .dtr_rts = acm_port_dtr_rts, 1119 .shutdown = acm_port_shutdown, 1120 .activate = acm_port_activate, 1121 .destruct = acm_port_destruct, 1122 }; 1123 1124 /* 1125 * USB probe and disconnect routines. 1126 */ 1127 1128 /* Little helpers: write/read buffers free */ 1129 static void acm_write_buffers_free(struct acm *acm) 1130 { 1131 int i; 1132 struct acm_wb *wb; 1133 1134 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1135 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1136 } 1137 1138 static void acm_read_buffers_free(struct acm *acm) 1139 { 1140 int i; 1141 1142 for (i = 0; i < acm->rx_buflimit; i++) 1143 usb_free_coherent(acm->dev, acm->readsize, 1144 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1145 } 1146 1147 /* Little helper: write buffers allocate */ 1148 static int acm_write_buffers_alloc(struct acm *acm) 1149 { 1150 int i; 1151 struct acm_wb *wb; 1152 1153 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1154 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1155 &wb->dmah); 1156 if (!wb->buf) { 1157 while (i != 0) { 1158 --i; 1159 --wb; 1160 usb_free_coherent(acm->dev, acm->writesize, 1161 wb->buf, wb->dmah); 1162 } 1163 return -ENOMEM; 1164 } 1165 } 1166 return 0; 1167 } 1168 1169 static int acm_probe(struct usb_interface *intf, 1170 const struct usb_device_id *id) 1171 { 1172 struct usb_cdc_union_desc *union_header = NULL; 1173 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1174 unsigned char *buffer = intf->altsetting->extra; 1175 int buflen = intf->altsetting->extralen; 1176 struct usb_interface *control_interface; 1177 struct usb_interface *data_interface; 1178 struct usb_endpoint_descriptor *epctrl = NULL; 1179 struct usb_endpoint_descriptor *epread = NULL; 1180 struct usb_endpoint_descriptor *epwrite = NULL; 1181 struct usb_device *usb_dev = interface_to_usbdev(intf); 1182 struct usb_cdc_parsed_header h; 1183 struct acm *acm; 1184 int minor; 1185 int ctrlsize, readsize; 1186 u8 *buf; 1187 int call_intf_num = -1; 1188 int data_intf_num = -1; 1189 unsigned long quirks; 1190 int num_rx_buf; 1191 int i; 1192 int combined_interfaces = 0; 1193 struct device *tty_dev; 1194 int rv = -ENOMEM; 1195 int res; 1196 1197 /* normal quirks */ 1198 quirks = (unsigned long)id->driver_info; 1199 1200 if (quirks == IGNORE_DEVICE) 1201 return -ENODEV; 1202 1203 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1204 1205 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1206 1207 /* handle quirks deadly to normal probing*/ 1208 if (quirks == NO_UNION_NORMAL) { 1209 data_interface = usb_ifnum_to_if(usb_dev, 1); 1210 control_interface = usb_ifnum_to_if(usb_dev, 0); 1211 /* we would crash */ 1212 if (!data_interface || !control_interface) 1213 return -ENODEV; 1214 goto skip_normal_probe; 1215 } 1216 1217 /* normal probing*/ 1218 if (!buffer) { 1219 dev_err(&intf->dev, "Weird descriptor references\n"); 1220 return -EINVAL; 1221 } 1222 1223 if (!buflen) { 1224 if (intf->cur_altsetting->endpoint && 1225 intf->cur_altsetting->endpoint->extralen && 1226 intf->cur_altsetting->endpoint->extra) { 1227 dev_dbg(&intf->dev, 1228 "Seeking extra descriptors on endpoint\n"); 1229 buflen = intf->cur_altsetting->endpoint->extralen; 1230 buffer = intf->cur_altsetting->endpoint->extra; 1231 } else { 1232 dev_err(&intf->dev, 1233 "Zero length descriptor references\n"); 1234 return -EINVAL; 1235 } 1236 } 1237 1238 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1239 union_header = h.usb_cdc_union_desc; 1240 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1241 if (cmgmd) 1242 call_intf_num = cmgmd->bDataInterface; 1243 1244 if (!union_header) { 1245 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1246 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1247 combined_interfaces = 1; 1248 control_interface = data_interface = intf; 1249 goto look_for_collapsed_interface; 1250 } else if (call_intf_num > 0) { 1251 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1252 data_intf_num = call_intf_num; 1253 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1254 control_interface = intf; 1255 } else { 1256 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1257 return -ENODEV; 1258 } 1259 } else { 1260 int class = -1; 1261 1262 data_intf_num = union_header->bSlaveInterface0; 1263 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1264 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1265 1266 if (control_interface) 1267 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1268 1269 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1270 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1271 combined_interfaces = 1; 1272 control_interface = data_interface = intf; 1273 goto look_for_collapsed_interface; 1274 } 1275 } 1276 1277 if (!control_interface || !data_interface) { 1278 dev_dbg(&intf->dev, "no interfaces\n"); 1279 return -ENODEV; 1280 } 1281 1282 if (data_intf_num != call_intf_num) 1283 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1284 1285 if (control_interface == data_interface) { 1286 /* some broken devices designed for windows work this way */ 1287 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1288 combined_interfaces = 1; 1289 /* a popular other OS doesn't use it */ 1290 quirks |= NO_CAP_LINE; 1291 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1292 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1293 return -EINVAL; 1294 } 1295 look_for_collapsed_interface: 1296 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1297 &epread, &epwrite, &epctrl, NULL); 1298 if (res) 1299 return res; 1300 1301 goto made_compressed_probe; 1302 } 1303 1304 skip_normal_probe: 1305 1306 /*workaround for switched interfaces */ 1307 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1308 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1309 dev_dbg(&intf->dev, 1310 "Your device has switched interfaces.\n"); 1311 swap(control_interface, data_interface); 1312 } else { 1313 return -EINVAL; 1314 } 1315 } 1316 1317 /* Accept probe requests only for the control interface */ 1318 if (!combined_interfaces && intf != control_interface) 1319 return -ENODEV; 1320 1321 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1322 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1323 return -EINVAL; 1324 1325 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1326 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1327 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1328 1329 1330 /* workaround for switched endpoints */ 1331 if (!usb_endpoint_dir_in(epread)) { 1332 /* descriptors are swapped */ 1333 dev_dbg(&intf->dev, 1334 "The data interface has switched endpoints\n"); 1335 swap(epread, epwrite); 1336 } 1337 made_compressed_probe: 1338 dev_dbg(&intf->dev, "interfaces are valid\n"); 1339 1340 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1341 if (!acm) 1342 return -ENOMEM; 1343 1344 tty_port_init(&acm->port); 1345 acm->port.ops = &acm_port_ops; 1346 1347 ctrlsize = usb_endpoint_maxp(epctrl); 1348 readsize = usb_endpoint_maxp(epread) * 1349 (quirks == SINGLE_RX_URB ? 1 : 2); 1350 acm->combined_interfaces = combined_interfaces; 1351 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1352 acm->control = control_interface; 1353 acm->data = data_interface; 1354 1355 usb_get_intf(acm->control); /* undone in destruct() */ 1356 1357 minor = acm_alloc_minor(acm); 1358 if (minor < 0) { 1359 acm->minor = ACM_MINOR_INVALID; 1360 goto err_put_port; 1361 } 1362 1363 acm->minor = minor; 1364 acm->dev = usb_dev; 1365 if (h.usb_cdc_acm_descriptor) 1366 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1367 if (quirks & NO_CAP_LINE) 1368 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1369 acm->ctrlsize = ctrlsize; 1370 acm->readsize = readsize; 1371 acm->rx_buflimit = num_rx_buf; 1372 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1373 init_waitqueue_head(&acm->wioctl); 1374 spin_lock_init(&acm->write_lock); 1375 spin_lock_init(&acm->read_lock); 1376 mutex_init(&acm->mutex); 1377 if (usb_endpoint_xfer_int(epread)) { 1378 acm->bInterval = epread->bInterval; 1379 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1380 } else { 1381 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1382 } 1383 if (usb_endpoint_xfer_int(epwrite)) 1384 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1385 else 1386 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1387 init_usb_anchor(&acm->delayed); 1388 acm->quirks = quirks; 1389 1390 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1391 if (!buf) 1392 goto err_put_port; 1393 acm->ctrl_buffer = buf; 1394 1395 if (acm_write_buffers_alloc(acm) < 0) 1396 goto err_free_ctrl_buffer; 1397 1398 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1399 if (!acm->ctrlurb) 1400 goto err_free_write_buffers; 1401 1402 for (i = 0; i < num_rx_buf; i++) { 1403 struct acm_rb *rb = &(acm->read_buffers[i]); 1404 struct urb *urb; 1405 1406 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1407 &rb->dma); 1408 if (!rb->base) 1409 goto err_free_read_urbs; 1410 rb->index = i; 1411 rb->instance = acm; 1412 1413 urb = usb_alloc_urb(0, GFP_KERNEL); 1414 if (!urb) 1415 goto err_free_read_urbs; 1416 1417 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1418 urb->transfer_dma = rb->dma; 1419 if (usb_endpoint_xfer_int(epread)) 1420 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1421 acm->readsize, 1422 acm_read_bulk_callback, rb, 1423 acm->bInterval); 1424 else 1425 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1426 acm->readsize, 1427 acm_read_bulk_callback, rb); 1428 1429 acm->read_urbs[i] = urb; 1430 __set_bit(i, &acm->read_urbs_free); 1431 } 1432 for (i = 0; i < ACM_NW; i++) { 1433 struct acm_wb *snd = &(acm->wb[i]); 1434 1435 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1436 if (!snd->urb) 1437 goto err_free_write_urbs; 1438 1439 if (usb_endpoint_xfer_int(epwrite)) 1440 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1441 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1442 else 1443 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1444 NULL, acm->writesize, acm_write_bulk, snd); 1445 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1446 if (quirks & SEND_ZERO_PACKET) 1447 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1448 snd->instance = acm; 1449 } 1450 1451 usb_set_intfdata(intf, acm); 1452 1453 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1454 if (i < 0) 1455 goto err_free_write_urbs; 1456 1457 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1458 struct usb_cdc_country_functional_desc * cfd = 1459 h.usb_cdc_country_functional_desc; 1460 1461 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1462 if (!acm->country_codes) 1463 goto skip_countries; 1464 acm->country_code_size = cfd->bLength - 4; 1465 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1466 cfd->bLength - 4); 1467 acm->country_rel_date = cfd->iCountryCodeRelDate; 1468 1469 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1470 if (i < 0) { 1471 kfree(acm->country_codes); 1472 acm->country_codes = NULL; 1473 acm->country_code_size = 0; 1474 goto skip_countries; 1475 } 1476 1477 i = device_create_file(&intf->dev, 1478 &dev_attr_iCountryCodeRelDate); 1479 if (i < 0) { 1480 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1481 kfree(acm->country_codes); 1482 acm->country_codes = NULL; 1483 acm->country_code_size = 0; 1484 goto skip_countries; 1485 } 1486 } 1487 1488 skip_countries: 1489 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1490 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1491 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1492 /* works around buggy devices */ 1493 epctrl->bInterval ? epctrl->bInterval : 16); 1494 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1495 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1496 acm->notification_buffer = NULL; 1497 acm->nb_index = 0; 1498 acm->nb_size = 0; 1499 1500 acm->line.dwDTERate = cpu_to_le32(9600); 1501 acm->line.bDataBits = 8; 1502 acm_set_line(acm, &acm->line); 1503 1504 if (!acm->combined_interfaces) { 1505 rv = usb_driver_claim_interface(&acm_driver, data_interface, acm); 1506 if (rv) 1507 goto err_remove_files; 1508 } 1509 1510 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1511 &control_interface->dev); 1512 if (IS_ERR(tty_dev)) { 1513 rv = PTR_ERR(tty_dev); 1514 goto err_release_data_interface; 1515 } 1516 1517 if (quirks & CLEAR_HALT_CONDITIONS) { 1518 usb_clear_halt(usb_dev, acm->in); 1519 usb_clear_halt(usb_dev, acm->out); 1520 } 1521 1522 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1523 1524 return 0; 1525 1526 err_release_data_interface: 1527 if (!acm->combined_interfaces) { 1528 /* Clear driver data so that disconnect() returns early. */ 1529 usb_set_intfdata(data_interface, NULL); 1530 usb_driver_release_interface(&acm_driver, data_interface); 1531 } 1532 err_remove_files: 1533 if (acm->country_codes) { 1534 device_remove_file(&acm->control->dev, 1535 &dev_attr_wCountryCodes); 1536 device_remove_file(&acm->control->dev, 1537 &dev_attr_iCountryCodeRelDate); 1538 } 1539 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1540 err_free_write_urbs: 1541 for (i = 0; i < ACM_NW; i++) 1542 usb_free_urb(acm->wb[i].urb); 1543 err_free_read_urbs: 1544 for (i = 0; i < num_rx_buf; i++) 1545 usb_free_urb(acm->read_urbs[i]); 1546 acm_read_buffers_free(acm); 1547 usb_free_urb(acm->ctrlurb); 1548 err_free_write_buffers: 1549 acm_write_buffers_free(acm); 1550 err_free_ctrl_buffer: 1551 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1552 err_put_port: 1553 tty_port_put(&acm->port); 1554 1555 return rv; 1556 } 1557 1558 static void acm_disconnect(struct usb_interface *intf) 1559 { 1560 struct acm *acm = usb_get_intfdata(intf); 1561 struct tty_struct *tty; 1562 int i; 1563 1564 /* sibling interface is already cleaning up */ 1565 if (!acm) 1566 return; 1567 1568 acm->disconnected = true; 1569 /* 1570 * there is a circular dependency. acm_softint() can resubmit 1571 * the URBs in error handling so we need to block any 1572 * submission right away 1573 */ 1574 acm_poison_urbs(acm); 1575 mutex_lock(&acm->mutex); 1576 if (acm->country_codes) { 1577 device_remove_file(&acm->control->dev, 1578 &dev_attr_wCountryCodes); 1579 device_remove_file(&acm->control->dev, 1580 &dev_attr_iCountryCodeRelDate); 1581 } 1582 wake_up_all(&acm->wioctl); 1583 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1584 usb_set_intfdata(acm->control, NULL); 1585 usb_set_intfdata(acm->data, NULL); 1586 mutex_unlock(&acm->mutex); 1587 1588 tty = tty_port_tty_get(&acm->port); 1589 if (tty) { 1590 tty_vhangup(tty); 1591 tty_kref_put(tty); 1592 } 1593 1594 cancel_delayed_work_sync(&acm->dwork); 1595 1596 tty_unregister_device(acm_tty_driver, acm->minor); 1597 1598 usb_free_urb(acm->ctrlurb); 1599 for (i = 0; i < ACM_NW; i++) 1600 usb_free_urb(acm->wb[i].urb); 1601 for (i = 0; i < acm->rx_buflimit; i++) 1602 usb_free_urb(acm->read_urbs[i]); 1603 acm_write_buffers_free(acm); 1604 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1605 acm_read_buffers_free(acm); 1606 1607 kfree(acm->notification_buffer); 1608 1609 if (!acm->combined_interfaces) 1610 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1611 acm->data : acm->control); 1612 1613 tty_port_put(&acm->port); 1614 } 1615 1616 #ifdef CONFIG_PM 1617 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1618 { 1619 struct acm *acm = usb_get_intfdata(intf); 1620 int cnt; 1621 1622 spin_lock_irq(&acm->write_lock); 1623 if (PMSG_IS_AUTO(message)) { 1624 if (acm->transmitting) { 1625 spin_unlock_irq(&acm->write_lock); 1626 return -EBUSY; 1627 } 1628 } 1629 cnt = acm->susp_count++; 1630 spin_unlock_irq(&acm->write_lock); 1631 1632 if (cnt) 1633 return 0; 1634 1635 acm_poison_urbs(acm); 1636 cancel_delayed_work_sync(&acm->dwork); 1637 acm->urbs_in_error_delay = 0; 1638 1639 return 0; 1640 } 1641 1642 static int acm_resume(struct usb_interface *intf) 1643 { 1644 struct acm *acm = usb_get_intfdata(intf); 1645 struct urb *urb; 1646 int rv = 0; 1647 1648 spin_lock_irq(&acm->write_lock); 1649 1650 if (--acm->susp_count) 1651 goto out; 1652 1653 acm_unpoison_urbs(acm); 1654 1655 if (tty_port_initialized(&acm->port)) { 1656 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1657 1658 for (;;) { 1659 urb = usb_get_from_anchor(&acm->delayed); 1660 if (!urb) 1661 break; 1662 1663 acm_start_wb(acm, urb->context); 1664 } 1665 1666 /* 1667 * delayed error checking because we must 1668 * do the write path at all cost 1669 */ 1670 if (rv < 0) 1671 goto out; 1672 1673 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1674 } 1675 out: 1676 spin_unlock_irq(&acm->write_lock); 1677 1678 return rv; 1679 } 1680 1681 static int acm_reset_resume(struct usb_interface *intf) 1682 { 1683 struct acm *acm = usb_get_intfdata(intf); 1684 1685 if (tty_port_initialized(&acm->port)) 1686 tty_port_tty_hangup(&acm->port, false); 1687 1688 return acm_resume(intf); 1689 } 1690 1691 #endif /* CONFIG_PM */ 1692 1693 static int acm_pre_reset(struct usb_interface *intf) 1694 { 1695 struct acm *acm = usb_get_intfdata(intf); 1696 1697 clear_bit(EVENT_RX_STALL, &acm->flags); 1698 acm->nb_index = 0; /* pending control transfers are lost */ 1699 1700 return 0; 1701 } 1702 1703 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1704 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1705 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1706 USB_CDC_ACM_PROTO_VENDOR) 1707 1708 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1709 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1710 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1711 USB_CDC_ACM_PROTO_VENDOR) 1712 1713 /* 1714 * USB driver structure. 1715 */ 1716 1717 static const struct usb_device_id acm_ids[] = { 1718 /* quirky and broken devices */ 1719 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1720 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1721 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1722 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1723 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1724 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1725 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1726 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1727 }, 1728 { USB_DEVICE(0x045b, 0x023c), /* Renesas USB Download mode */ 1729 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1730 }, 1731 { USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */ 1732 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1733 }, 1734 { USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */ 1735 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1736 }, 1737 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1738 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1739 }, 1740 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1741 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1742 }, 1743 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1744 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1745 }, 1746 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1747 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1748 }, 1749 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1750 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1751 }, 1752 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1753 .driver_info = SINGLE_RX_URB, 1754 }, 1755 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1756 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1757 }, 1758 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1759 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1760 }, 1761 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1762 .driver_info = SINGLE_RX_URB, 1763 }, 1764 { USB_DEVICE(0x1901, 0x0006), /* GE Healthcare Patient Monitor UI Controller */ 1765 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1766 }, 1767 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1768 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1769 }, 1770 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1771 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1772 }, 1773 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1774 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1775 }, 1776 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1777 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1778 }, 1779 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1780 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1781 }, 1782 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1783 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1784 }, 1785 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1786 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1787 }, 1788 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1789 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1790 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1791 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1792 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1793 }, 1794 /* Motorola H24 HSPA module: */ 1795 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1796 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1797 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1798 }, 1799 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1800 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1801 }, 1802 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1803 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1804 }, 1805 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1806 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1807 }, 1808 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1809 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1810 }, 1811 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1812 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1813 }, 1814 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1815 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1816 }, 1817 1818 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1819 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1820 data interface instead of 1821 communications interface. 1822 Maybe we should define a new 1823 quirk for this. */ 1824 }, 1825 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1826 .driver_info = NO_UNION_NORMAL, 1827 }, 1828 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1829 .driver_info = NO_UNION_NORMAL, 1830 }, 1831 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1832 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1833 }, 1834 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1835 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1836 }, 1837 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1838 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1839 }, 1840 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1841 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1842 }, 1843 { USB_DEVICE(0x0c26, 0x0020), /* Icom ICF3400 Serie */ 1844 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1845 }, 1846 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1847 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1848 }, 1849 1850 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1851 .driver_info = CLEAR_HALT_CONDITIONS, 1852 }, 1853 1854 /* Nokia S60 phones expose two ACM channels. The first is 1855 * a modem and is picked up by the standard AT-command 1856 * information below. The second is 'vendor-specific' but 1857 * is treated as a serial device at the S60 end, so we want 1858 * to expose it on Linux too. */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1888 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1889 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1890 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1891 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1892 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1893 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1894 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1895 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1896 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1897 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1898 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1899 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1900 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1901 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1902 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1903 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1904 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1905 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1906 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1907 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1908 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1909 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1910 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1911 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1912 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1913 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1914 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1915 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1916 1917 /* Support for Owen devices */ 1918 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1919 1920 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1921 1922 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1923 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1924 .driver_info = IGNORE_DEVICE, 1925 }, 1926 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1927 .driver_info = IGNORE_DEVICE, 1928 }, 1929 #endif 1930 1931 #if IS_ENABLED(CONFIG_IR_TOY) 1932 { USB_DEVICE(0x04d8, 0xfd08), 1933 .driver_info = IGNORE_DEVICE, 1934 }, 1935 1936 { USB_DEVICE(0x04d8, 0xf58b), 1937 .driver_info = IGNORE_DEVICE, 1938 }, 1939 #endif 1940 1941 #if IS_ENABLED(CONFIG_USB_SERIAL_XR) 1942 { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE }, 1943 { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE }, 1944 { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE }, 1945 { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE }, 1946 { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE }, 1947 { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE }, 1948 { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE }, 1949 { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE }, 1950 { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE }, 1951 { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE }, 1952 { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE }, 1953 #endif 1954 1955 /*Samsung phone in firmware update mode */ 1956 { USB_DEVICE(0x04e8, 0x685d), 1957 .driver_info = IGNORE_DEVICE, 1958 }, 1959 1960 /* Exclude Infineon Flash Loader utility */ 1961 { USB_DEVICE(0x058b, 0x0041), 1962 .driver_info = IGNORE_DEVICE, 1963 }, 1964 1965 /* Exclude ETAS ES58x */ 1966 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 1967 .driver_info = IGNORE_DEVICE, 1968 }, 1969 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 1970 .driver_info = IGNORE_DEVICE, 1971 }, 1972 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 1973 .driver_info = IGNORE_DEVICE, 1974 }, 1975 1976 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1977 .driver_info = SEND_ZERO_PACKET, 1978 }, 1979 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1980 .driver_info = SEND_ZERO_PACKET, 1981 }, 1982 1983 /* Exclude Goodix Fingerprint Reader */ 1984 { USB_DEVICE(0x27c6, 0x5395), 1985 .driver_info = IGNORE_DEVICE, 1986 }, 1987 1988 /* Exclude Heimann Sensor GmbH USB appset demo */ 1989 { USB_DEVICE(0x32a7, 0x0000), 1990 .driver_info = IGNORE_DEVICE, 1991 }, 1992 1993 /* control interfaces without any protocol set */ 1994 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1995 USB_CDC_PROTO_NONE) }, 1996 1997 /* control interfaces with various AT-command sets */ 1998 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1999 USB_CDC_ACM_PROTO_AT_V25TER) }, 2000 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2001 USB_CDC_ACM_PROTO_AT_PCCA101) }, 2002 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2003 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 2004 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2005 USB_CDC_ACM_PROTO_AT_GSM) }, 2006 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2007 USB_CDC_ACM_PROTO_AT_3G) }, 2008 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2009 USB_CDC_ACM_PROTO_AT_CDMA) }, 2010 2011 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 2012 .driver_info = SEND_ZERO_PACKET, 2013 }, 2014 2015 { } 2016 }; 2017 2018 MODULE_DEVICE_TABLE(usb, acm_ids); 2019 2020 static struct usb_driver acm_driver = { 2021 .name = "cdc_acm", 2022 .probe = acm_probe, 2023 .disconnect = acm_disconnect, 2024 #ifdef CONFIG_PM 2025 .suspend = acm_suspend, 2026 .resume = acm_resume, 2027 .reset_resume = acm_reset_resume, 2028 #endif 2029 .pre_reset = acm_pre_reset, 2030 .id_table = acm_ids, 2031 #ifdef CONFIG_PM 2032 .supports_autosuspend = 1, 2033 #endif 2034 .disable_hub_initiated_lpm = 1, 2035 }; 2036 2037 /* 2038 * TTY driver structures. 2039 */ 2040 2041 static const struct tty_operations acm_ops = { 2042 .install = acm_tty_install, 2043 .open = acm_tty_open, 2044 .close = acm_tty_close, 2045 .cleanup = acm_tty_cleanup, 2046 .hangup = acm_tty_hangup, 2047 .write = acm_tty_write, 2048 .write_room = acm_tty_write_room, 2049 .flush_buffer = acm_tty_flush_buffer, 2050 .ioctl = acm_tty_ioctl, 2051 .throttle = acm_tty_throttle, 2052 .unthrottle = acm_tty_unthrottle, 2053 .chars_in_buffer = acm_tty_chars_in_buffer, 2054 .break_ctl = acm_tty_break_ctl, 2055 .set_termios = acm_tty_set_termios, 2056 .tiocmget = acm_tty_tiocmget, 2057 .tiocmset = acm_tty_tiocmset, 2058 .get_serial = get_serial_info, 2059 .set_serial = set_serial_info, 2060 .get_icount = acm_tty_get_icount, 2061 }; 2062 2063 /* 2064 * Init / exit. 2065 */ 2066 2067 static int __init acm_init(void) 2068 { 2069 int retval; 2070 acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW | 2071 TTY_DRIVER_DYNAMIC_DEV); 2072 if (IS_ERR(acm_tty_driver)) 2073 return PTR_ERR(acm_tty_driver); 2074 acm_tty_driver->driver_name = "acm", 2075 acm_tty_driver->name = "ttyACM", 2076 acm_tty_driver->major = ACM_TTY_MAJOR, 2077 acm_tty_driver->minor_start = 0, 2078 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2079 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2080 acm_tty_driver->init_termios = tty_std_termios; 2081 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2082 HUPCL | CLOCAL; 2083 tty_set_operations(acm_tty_driver, &acm_ops); 2084 2085 retval = tty_register_driver(acm_tty_driver); 2086 if (retval) { 2087 tty_driver_kref_put(acm_tty_driver); 2088 return retval; 2089 } 2090 2091 retval = usb_register(&acm_driver); 2092 if (retval) { 2093 tty_unregister_driver(acm_tty_driver); 2094 tty_driver_kref_put(acm_tty_driver); 2095 return retval; 2096 } 2097 2098 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2099 2100 return 0; 2101 } 2102 2103 static void __exit acm_exit(void) 2104 { 2105 usb_deregister(&acm_driver); 2106 tty_unregister_driver(acm_tty_driver); 2107 tty_driver_kref_put(acm_tty_driver); 2108 idr_destroy(&acm_minors); 2109 } 2110 2111 module_init(acm_init); 2112 module_exit(acm_exit); 2113 2114 MODULE_AUTHOR(DRIVER_AUTHOR); 2115 MODULE_DESCRIPTION(DRIVER_DESC); 2116 MODULE_LICENSE("GPL"); 2117 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2118