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 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, 5000); 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_kill_urbs(struct acm *acm) 151 { 152 int i; 153 154 usb_kill_urb(acm->ctrlurb); 155 for (i = 0; i < ACM_NW; i++) 156 usb_kill_urb(acm->wb[i].urb); 157 for (i = 0; i < acm->rx_buflimit; i++) 158 usb_kill_urb(acm->read_urbs[i]); 159 } 160 161 /* 162 * Write buffer management. 163 * All of these assume proper locks taken by the caller. 164 */ 165 166 static int acm_wb_alloc(struct acm *acm) 167 { 168 int i, wbn; 169 struct acm_wb *wb; 170 171 wbn = 0; 172 i = 0; 173 for (;;) { 174 wb = &acm->wb[wbn]; 175 if (!wb->use) { 176 wb->use = true; 177 wb->len = 0; 178 return wbn; 179 } 180 wbn = (wbn + 1) % ACM_NW; 181 if (++i >= ACM_NW) 182 return -1; 183 } 184 } 185 186 static int acm_wb_is_avail(struct acm *acm) 187 { 188 int i, n; 189 unsigned long flags; 190 191 n = ACM_NW; 192 spin_lock_irqsave(&acm->write_lock, flags); 193 for (i = 0; i < ACM_NW; i++) 194 if(acm->wb[i].use) 195 n--; 196 spin_unlock_irqrestore(&acm->write_lock, flags); 197 return n; 198 } 199 200 /* 201 * Finish write. Caller must hold acm->write_lock 202 */ 203 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 204 { 205 wb->use = false; 206 acm->transmitting--; 207 usb_autopm_put_interface_async(acm->control); 208 } 209 210 /* 211 * Poke write. 212 * 213 * the caller is responsible for locking 214 */ 215 216 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 217 { 218 int rc; 219 220 acm->transmitting++; 221 222 wb->urb->transfer_buffer = wb->buf; 223 wb->urb->transfer_dma = wb->dmah; 224 wb->urb->transfer_buffer_length = wb->len; 225 wb->urb->dev = acm->dev; 226 227 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 228 if (rc < 0) { 229 dev_err(&acm->data->dev, 230 "%s - usb_submit_urb(write bulk) failed: %d\n", 231 __func__, rc); 232 acm_write_done(acm, wb); 233 } 234 return rc; 235 } 236 237 /* 238 * attributes exported through sysfs 239 */ 240 static ssize_t bmCapabilities_show 241 (struct device *dev, struct device_attribute *attr, char *buf) 242 { 243 struct usb_interface *intf = to_usb_interface(dev); 244 struct acm *acm = usb_get_intfdata(intf); 245 246 return sprintf(buf, "%d", acm->ctrl_caps); 247 } 248 static DEVICE_ATTR_RO(bmCapabilities); 249 250 static ssize_t wCountryCodes_show 251 (struct device *dev, struct device_attribute *attr, char *buf) 252 { 253 struct usb_interface *intf = to_usb_interface(dev); 254 struct acm *acm = usb_get_intfdata(intf); 255 256 memcpy(buf, acm->country_codes, acm->country_code_size); 257 return acm->country_code_size; 258 } 259 260 static DEVICE_ATTR_RO(wCountryCodes); 261 262 static ssize_t iCountryCodeRelDate_show 263 (struct device *dev, struct device_attribute *attr, char *buf) 264 { 265 struct usb_interface *intf = to_usb_interface(dev); 266 struct acm *acm = usb_get_intfdata(intf); 267 268 return sprintf(buf, "%d", acm->country_rel_date); 269 } 270 271 static DEVICE_ATTR_RO(iCountryCodeRelDate); 272 /* 273 * Interrupt handlers for various ACM device responses 274 */ 275 276 static void acm_process_notification(struct acm *acm, unsigned char *buf) 277 { 278 int newctrl; 279 int difference; 280 unsigned long flags; 281 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 282 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 283 284 switch (dr->bNotificationType) { 285 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 286 dev_dbg(&acm->control->dev, 287 "%s - network connection: %d\n", __func__, dr->wValue); 288 break; 289 290 case USB_CDC_NOTIFY_SERIAL_STATE: 291 if (le16_to_cpu(dr->wLength) != 2) { 292 dev_dbg(&acm->control->dev, 293 "%s - malformed serial state\n", __func__); 294 break; 295 } 296 297 newctrl = get_unaligned_le16(data); 298 dev_dbg(&acm->control->dev, 299 "%s - serial state: 0x%x\n", __func__, newctrl); 300 301 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 302 dev_dbg(&acm->control->dev, 303 "%s - calling hangup\n", __func__); 304 tty_port_tty_hangup(&acm->port, false); 305 } 306 307 difference = acm->ctrlin ^ newctrl; 308 spin_lock_irqsave(&acm->read_lock, flags); 309 acm->ctrlin = newctrl; 310 acm->oldcount = acm->iocount; 311 312 if (difference & ACM_CTRL_DSR) 313 acm->iocount.dsr++; 314 if (difference & ACM_CTRL_DCD) 315 acm->iocount.dcd++; 316 if (newctrl & ACM_CTRL_BRK) 317 acm->iocount.brk++; 318 if (newctrl & ACM_CTRL_RI) 319 acm->iocount.rng++; 320 if (newctrl & ACM_CTRL_FRAMING) 321 acm->iocount.frame++; 322 if (newctrl & ACM_CTRL_PARITY) 323 acm->iocount.parity++; 324 if (newctrl & ACM_CTRL_OVERRUN) 325 acm->iocount.overrun++; 326 spin_unlock_irqrestore(&acm->read_lock, flags); 327 328 if (difference) 329 wake_up_all(&acm->wioctl); 330 331 break; 332 333 default: 334 dev_dbg(&acm->control->dev, 335 "%s - unknown notification %d received: index %d len %d\n", 336 __func__, 337 dr->bNotificationType, dr->wIndex, dr->wLength); 338 } 339 } 340 341 /* control interface reports status changes with "interrupt" transfers */ 342 static void acm_ctrl_irq(struct urb *urb) 343 { 344 struct acm *acm = urb->context; 345 struct usb_cdc_notification *dr = urb->transfer_buffer; 346 unsigned int current_size = urb->actual_length; 347 unsigned int expected_size, copy_size, alloc_size; 348 int retval; 349 int status = urb->status; 350 351 switch (status) { 352 case 0: 353 /* success */ 354 break; 355 case -ECONNRESET: 356 case -ENOENT: 357 case -ESHUTDOWN: 358 /* this urb is terminated, clean up */ 359 dev_dbg(&acm->control->dev, 360 "%s - urb shutting down with status: %d\n", 361 __func__, status); 362 return; 363 default: 364 dev_dbg(&acm->control->dev, 365 "%s - nonzero urb status received: %d\n", 366 __func__, status); 367 goto exit; 368 } 369 370 usb_mark_last_busy(acm->dev); 371 372 if (acm->nb_index) 373 dr = (struct usb_cdc_notification *)acm->notification_buffer; 374 375 /* size = notification-header + (optional) data */ 376 expected_size = sizeof(struct usb_cdc_notification) + 377 le16_to_cpu(dr->wLength); 378 379 if (current_size < expected_size) { 380 /* notification is transmitted fragmented, reassemble */ 381 if (acm->nb_size < expected_size) { 382 u8 *new_buffer; 383 alloc_size = roundup_pow_of_two(expected_size); 384 /* Final freeing is done on disconnect. */ 385 new_buffer = krealloc(acm->notification_buffer, 386 alloc_size, GFP_ATOMIC); 387 if (!new_buffer) { 388 acm->nb_index = 0; 389 goto exit; 390 } 391 392 acm->notification_buffer = new_buffer; 393 acm->nb_size = alloc_size; 394 dr = (struct usb_cdc_notification *)acm->notification_buffer; 395 } 396 397 copy_size = min(current_size, 398 expected_size - acm->nb_index); 399 400 memcpy(&acm->notification_buffer[acm->nb_index], 401 urb->transfer_buffer, copy_size); 402 acm->nb_index += copy_size; 403 current_size = acm->nb_index; 404 } 405 406 if (current_size >= expected_size) { 407 /* notification complete */ 408 acm_process_notification(acm, (unsigned char *)dr); 409 acm->nb_index = 0; 410 } 411 412 exit: 413 retval = usb_submit_urb(urb, GFP_ATOMIC); 414 if (retval && retval != -EPERM && retval != -ENODEV) 415 dev_err(&acm->control->dev, 416 "%s - usb_submit_urb failed: %d\n", __func__, retval); 417 else 418 dev_vdbg(&acm->control->dev, 419 "control resubmission terminated %d\n", retval); 420 } 421 422 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 423 { 424 int res; 425 426 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 427 return 0; 428 429 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 430 if (res) { 431 if (res != -EPERM && res != -ENODEV) { 432 dev_err(&acm->data->dev, 433 "urb %d failed submission with %d\n", 434 index, res); 435 } else { 436 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 437 } 438 set_bit(index, &acm->read_urbs_free); 439 return res; 440 } else { 441 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 442 } 443 444 return 0; 445 } 446 447 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 448 { 449 int res; 450 int i; 451 452 for (i = 0; i < acm->rx_buflimit; ++i) { 453 res = acm_submit_read_urb(acm, i, mem_flags); 454 if (res) 455 return res; 456 } 457 458 return 0; 459 } 460 461 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 462 { 463 if (!urb->actual_length) 464 return; 465 466 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 467 urb->actual_length); 468 tty_flip_buffer_push(&acm->port); 469 } 470 471 static void acm_read_bulk_callback(struct urb *urb) 472 { 473 struct acm_rb *rb = urb->context; 474 struct acm *acm = rb->instance; 475 int status = urb->status; 476 bool stopped = false; 477 bool stalled = false; 478 bool cooldown = false; 479 480 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 481 rb->index, urb->actual_length, status); 482 483 if (!acm->dev) { 484 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 485 return; 486 } 487 488 switch (status) { 489 case 0: 490 usb_mark_last_busy(acm->dev); 491 acm_process_read_urb(acm, urb); 492 break; 493 case -EPIPE: 494 set_bit(EVENT_RX_STALL, &acm->flags); 495 stalled = true; 496 break; 497 case -ENOENT: 498 case -ECONNRESET: 499 case -ESHUTDOWN: 500 dev_dbg(&acm->data->dev, 501 "%s - urb shutting down with status: %d\n", 502 __func__, status); 503 stopped = true; 504 break; 505 case -EOVERFLOW: 506 case -EPROTO: 507 dev_dbg(&acm->data->dev, 508 "%s - cooling babbling device\n", __func__); 509 usb_mark_last_busy(acm->dev); 510 set_bit(rb->index, &acm->urbs_in_error_delay); 511 cooldown = true; 512 break; 513 default: 514 dev_dbg(&acm->data->dev, 515 "%s - nonzero urb status received: %d\n", 516 __func__, status); 517 break; 518 } 519 520 /* 521 * Make sure URB processing is done before marking as free to avoid 522 * racing with unthrottle() on another CPU. Matches the barriers 523 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 524 */ 525 smp_mb__before_atomic(); 526 set_bit(rb->index, &acm->read_urbs_free); 527 /* 528 * Make sure URB is marked as free before checking the throttled flag 529 * to avoid racing with unthrottle() on another CPU. Matches the 530 * smp_mb() in unthrottle(). 531 */ 532 smp_mb__after_atomic(); 533 534 if (stopped || stalled || cooldown) { 535 if (stalled) 536 schedule_work(&acm->work); 537 else if (cooldown) 538 schedule_delayed_work(&acm->dwork, HZ / 2); 539 return; 540 } 541 542 if (test_bit(ACM_THROTTLED, &acm->flags)) 543 return; 544 545 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 546 } 547 548 /* data interface wrote those outgoing bytes */ 549 static void acm_write_bulk(struct urb *urb) 550 { 551 struct acm_wb *wb = urb->context; 552 struct acm *acm = wb->instance; 553 unsigned long flags; 554 int status = urb->status; 555 556 if (status || (urb->actual_length != urb->transfer_buffer_length)) 557 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 558 urb->actual_length, 559 urb->transfer_buffer_length, 560 status); 561 562 spin_lock_irqsave(&acm->write_lock, flags); 563 acm_write_done(acm, wb); 564 spin_unlock_irqrestore(&acm->write_lock, flags); 565 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 566 schedule_work(&acm->work); 567 } 568 569 static void acm_softint(struct work_struct *work) 570 { 571 int i; 572 struct acm *acm = container_of(work, struct acm, work); 573 574 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 575 smp_mb(); /* against acm_suspend() */ 576 if (!acm->susp_count) { 577 for (i = 0; i < acm->rx_buflimit; i++) 578 usb_kill_urb(acm->read_urbs[i]); 579 usb_clear_halt(acm->dev, acm->in); 580 acm_submit_read_urbs(acm, GFP_KERNEL); 581 clear_bit(EVENT_RX_STALL, &acm->flags); 582 } 583 } 584 585 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 586 for (i = 0; i < acm->rx_buflimit; i++) 587 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 588 acm_submit_read_urb(acm, i, GFP_NOIO); 589 } 590 591 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 592 tty_port_tty_wakeup(&acm->port); 593 } 594 595 /* 596 * TTY handlers 597 */ 598 599 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 600 { 601 struct acm *acm; 602 int retval; 603 604 acm = acm_get_by_minor(tty->index); 605 if (!acm) 606 return -ENODEV; 607 608 retval = tty_standard_install(driver, tty); 609 if (retval) 610 goto error_init_termios; 611 612 /* 613 * Suppress initial echoing for some devices which might send data 614 * immediately after acm driver has been installed. 615 */ 616 if (acm->quirks & DISABLE_ECHO) 617 tty->termios.c_lflag &= ~ECHO; 618 619 tty->driver_data = acm; 620 621 return 0; 622 623 error_init_termios: 624 tty_port_put(&acm->port); 625 return retval; 626 } 627 628 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 629 { 630 struct acm *acm = tty->driver_data; 631 632 return tty_port_open(&acm->port, tty, filp); 633 } 634 635 static void acm_port_dtr_rts(struct tty_port *port, int raise) 636 { 637 struct acm *acm = container_of(port, struct acm, port); 638 int val; 639 int res; 640 641 if (raise) 642 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 643 else 644 val = 0; 645 646 /* FIXME: add missing ctrlout locking throughout driver */ 647 acm->ctrlout = val; 648 649 res = acm_set_control(acm, val); 650 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 651 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 652 } 653 654 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 655 { 656 struct acm *acm = container_of(port, struct acm, port); 657 int retval = -ENODEV; 658 int i; 659 660 mutex_lock(&acm->mutex); 661 if (acm->disconnected) 662 goto disconnected; 663 664 retval = usb_autopm_get_interface(acm->control); 665 if (retval) 666 goto error_get_interface; 667 668 /* 669 * FIXME: Why do we need this? Allocating 64K of physically contiguous 670 * memory is really nasty... 671 */ 672 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 673 acm->control->needs_remote_wakeup = 1; 674 675 acm->ctrlurb->dev = acm->dev; 676 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 677 if (retval) { 678 dev_err(&acm->control->dev, 679 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 680 goto error_submit_urb; 681 } 682 683 acm_tty_set_termios(tty, NULL); 684 685 /* 686 * Unthrottle device in case the TTY was closed while throttled. 687 */ 688 clear_bit(ACM_THROTTLED, &acm->flags); 689 690 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 691 if (retval) 692 goto error_submit_read_urbs; 693 694 usb_autopm_put_interface(acm->control); 695 696 mutex_unlock(&acm->mutex); 697 698 return 0; 699 700 error_submit_read_urbs: 701 for (i = 0; i < acm->rx_buflimit; i++) 702 usb_kill_urb(acm->read_urbs[i]); 703 usb_kill_urb(acm->ctrlurb); 704 error_submit_urb: 705 usb_autopm_put_interface(acm->control); 706 error_get_interface: 707 disconnected: 708 mutex_unlock(&acm->mutex); 709 710 return usb_translate_errors(retval); 711 } 712 713 static void acm_port_destruct(struct tty_port *port) 714 { 715 struct acm *acm = container_of(port, struct acm, port); 716 717 acm_release_minor(acm); 718 usb_put_intf(acm->control); 719 kfree(acm->country_codes); 720 kfree(acm); 721 } 722 723 static void acm_port_shutdown(struct tty_port *port) 724 { 725 struct acm *acm = container_of(port, struct acm, port); 726 struct urb *urb; 727 struct acm_wb *wb; 728 729 /* 730 * Need to grab write_lock to prevent race with resume, but no need to 731 * hold it due to the tty-port initialised flag. 732 */ 733 spin_lock_irq(&acm->write_lock); 734 spin_unlock_irq(&acm->write_lock); 735 736 usb_autopm_get_interface_no_resume(acm->control); 737 acm->control->needs_remote_wakeup = 0; 738 usb_autopm_put_interface(acm->control); 739 740 for (;;) { 741 urb = usb_get_from_anchor(&acm->delayed); 742 if (!urb) 743 break; 744 wb = urb->context; 745 wb->use = false; 746 usb_autopm_put_interface_async(acm->control); 747 } 748 749 acm_kill_urbs(acm); 750 } 751 752 static void acm_tty_cleanup(struct tty_struct *tty) 753 { 754 struct acm *acm = tty->driver_data; 755 756 tty_port_put(&acm->port); 757 } 758 759 static void acm_tty_hangup(struct tty_struct *tty) 760 { 761 struct acm *acm = tty->driver_data; 762 763 tty_port_hangup(&acm->port); 764 } 765 766 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 767 { 768 struct acm *acm = tty->driver_data; 769 770 tty_port_close(&acm->port, tty, filp); 771 } 772 773 static int acm_tty_write(struct tty_struct *tty, 774 const unsigned char *buf, int count) 775 { 776 struct acm *acm = tty->driver_data; 777 int stat; 778 unsigned long flags; 779 int wbn; 780 struct acm_wb *wb; 781 782 if (!count) 783 return 0; 784 785 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 786 787 spin_lock_irqsave(&acm->write_lock, flags); 788 wbn = acm_wb_alloc(acm); 789 if (wbn < 0) { 790 spin_unlock_irqrestore(&acm->write_lock, flags); 791 return 0; 792 } 793 wb = &acm->wb[wbn]; 794 795 if (!acm->dev) { 796 wb->use = false; 797 spin_unlock_irqrestore(&acm->write_lock, flags); 798 return -ENODEV; 799 } 800 801 count = (count > acm->writesize) ? acm->writesize : count; 802 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 803 memcpy(wb->buf, buf, count); 804 wb->len = count; 805 806 stat = usb_autopm_get_interface_async(acm->control); 807 if (stat) { 808 wb->use = false; 809 spin_unlock_irqrestore(&acm->write_lock, flags); 810 return stat; 811 } 812 813 if (acm->susp_count) { 814 usb_anchor_urb(wb->urb, &acm->delayed); 815 spin_unlock_irqrestore(&acm->write_lock, flags); 816 return count; 817 } 818 819 stat = acm_start_wb(acm, wb); 820 spin_unlock_irqrestore(&acm->write_lock, flags); 821 822 if (stat < 0) 823 return stat; 824 return count; 825 } 826 827 static int acm_tty_write_room(struct tty_struct *tty) 828 { 829 struct acm *acm = tty->driver_data; 830 /* 831 * Do not let the line discipline to know that we have a reserve, 832 * or it might get too enthusiastic. 833 */ 834 return acm_wb_is_avail(acm) ? acm->writesize : 0; 835 } 836 837 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 838 { 839 struct acm *acm = tty->driver_data; 840 /* 841 * if the device was unplugged then any remaining characters fell out 842 * of the connector ;) 843 */ 844 if (acm->disconnected) 845 return 0; 846 /* 847 * This is inaccurate (overcounts), but it works. 848 */ 849 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 850 } 851 852 static void acm_tty_throttle(struct tty_struct *tty) 853 { 854 struct acm *acm = tty->driver_data; 855 856 set_bit(ACM_THROTTLED, &acm->flags); 857 } 858 859 static void acm_tty_unthrottle(struct tty_struct *tty) 860 { 861 struct acm *acm = tty->driver_data; 862 863 clear_bit(ACM_THROTTLED, &acm->flags); 864 865 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 866 smp_mb(); 867 868 acm_submit_read_urbs(acm, GFP_KERNEL); 869 } 870 871 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 872 { 873 struct acm *acm = tty->driver_data; 874 int retval; 875 876 retval = acm_send_break(acm, state ? 0xffff : 0); 877 if (retval < 0) 878 dev_dbg(&acm->control->dev, 879 "%s - send break failed\n", __func__); 880 return retval; 881 } 882 883 static int acm_tty_tiocmget(struct tty_struct *tty) 884 { 885 struct acm *acm = tty->driver_data; 886 887 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 888 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 889 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 890 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 891 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 892 TIOCM_CTS; 893 } 894 895 static int acm_tty_tiocmset(struct tty_struct *tty, 896 unsigned int set, unsigned int clear) 897 { 898 struct acm *acm = tty->driver_data; 899 unsigned int newctrl; 900 901 newctrl = acm->ctrlout; 902 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 903 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 904 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 905 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 906 907 newctrl = (newctrl & ~clear) | set; 908 909 if (acm->ctrlout == newctrl) 910 return 0; 911 return acm_set_control(acm, acm->ctrlout = newctrl); 912 } 913 914 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 915 { 916 struct acm *acm = tty->driver_data; 917 918 ss->xmit_fifo_size = acm->writesize; 919 ss->baud_base = le32_to_cpu(acm->line.dwDTERate); 920 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 921 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 922 ASYNC_CLOSING_WAIT_NONE : 923 jiffies_to_msecs(acm->port.closing_wait) / 10; 924 return 0; 925 } 926 927 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 928 { 929 struct acm *acm = tty->driver_data; 930 unsigned int closing_wait, close_delay; 931 unsigned int old_closing_wait, old_close_delay; 932 int retval = 0; 933 934 close_delay = msecs_to_jiffies(ss->close_delay * 10); 935 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 936 ASYNC_CLOSING_WAIT_NONE : 937 msecs_to_jiffies(ss->closing_wait * 10); 938 939 /* we must redo the rounding here, so that the values match */ 940 old_close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 941 old_closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 942 ASYNC_CLOSING_WAIT_NONE : 943 jiffies_to_msecs(acm->port.closing_wait) / 10; 944 945 mutex_lock(&acm->port.mutex); 946 947 if (!capable(CAP_SYS_ADMIN)) { 948 if ((ss->close_delay != old_close_delay) || 949 (ss->closing_wait != old_closing_wait)) 950 retval = -EPERM; 951 else 952 retval = -EOPNOTSUPP; 953 } else { 954 acm->port.close_delay = close_delay; 955 acm->port.closing_wait = closing_wait; 956 } 957 958 mutex_unlock(&acm->port.mutex); 959 return retval; 960 } 961 962 static int wait_serial_change(struct acm *acm, unsigned long arg) 963 { 964 int rv = 0; 965 DECLARE_WAITQUEUE(wait, current); 966 struct async_icount old, new; 967 968 do { 969 spin_lock_irq(&acm->read_lock); 970 old = acm->oldcount; 971 new = acm->iocount; 972 acm->oldcount = new; 973 spin_unlock_irq(&acm->read_lock); 974 975 if ((arg & TIOCM_DSR) && 976 old.dsr != new.dsr) 977 break; 978 if ((arg & TIOCM_CD) && 979 old.dcd != new.dcd) 980 break; 981 if ((arg & TIOCM_RI) && 982 old.rng != new.rng) 983 break; 984 985 add_wait_queue(&acm->wioctl, &wait); 986 set_current_state(TASK_INTERRUPTIBLE); 987 schedule(); 988 remove_wait_queue(&acm->wioctl, &wait); 989 if (acm->disconnected) { 990 if (arg & TIOCM_CD) 991 break; 992 else 993 rv = -ENODEV; 994 } else { 995 if (signal_pending(current)) 996 rv = -ERESTARTSYS; 997 } 998 } while (!rv); 999 1000 1001 1002 return rv; 1003 } 1004 1005 static int acm_tty_get_icount(struct tty_struct *tty, 1006 struct serial_icounter_struct *icount) 1007 { 1008 struct acm *acm = tty->driver_data; 1009 1010 icount->dsr = acm->iocount.dsr; 1011 icount->rng = acm->iocount.rng; 1012 icount->dcd = acm->iocount.dcd; 1013 icount->frame = acm->iocount.frame; 1014 icount->overrun = acm->iocount.overrun; 1015 icount->parity = acm->iocount.parity; 1016 icount->brk = acm->iocount.brk; 1017 1018 return 0; 1019 } 1020 1021 static int acm_tty_ioctl(struct tty_struct *tty, 1022 unsigned int cmd, unsigned long arg) 1023 { 1024 struct acm *acm = tty->driver_data; 1025 int rv = -ENOIOCTLCMD; 1026 1027 switch (cmd) { 1028 case TIOCMIWAIT: 1029 rv = usb_autopm_get_interface(acm->control); 1030 if (rv < 0) { 1031 rv = -EIO; 1032 break; 1033 } 1034 rv = wait_serial_change(acm, arg); 1035 usb_autopm_put_interface(acm->control); 1036 break; 1037 } 1038 1039 return rv; 1040 } 1041 1042 static void acm_tty_set_termios(struct tty_struct *tty, 1043 struct ktermios *termios_old) 1044 { 1045 struct acm *acm = tty->driver_data; 1046 struct ktermios *termios = &tty->termios; 1047 struct usb_cdc_line_coding newline; 1048 int newctrl = acm->ctrlout; 1049 1050 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1051 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1052 newline.bParityType = termios->c_cflag & PARENB ? 1053 (termios->c_cflag & PARODD ? 1 : 2) + 1054 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1055 switch (termios->c_cflag & CSIZE) { 1056 case CS5: 1057 newline.bDataBits = 5; 1058 break; 1059 case CS6: 1060 newline.bDataBits = 6; 1061 break; 1062 case CS7: 1063 newline.bDataBits = 7; 1064 break; 1065 case CS8: 1066 default: 1067 newline.bDataBits = 8; 1068 break; 1069 } 1070 /* FIXME: Needs to clear unsupported bits in the termios */ 1071 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1072 1073 if (C_BAUD(tty) == B0) { 1074 newline.dwDTERate = acm->line.dwDTERate; 1075 newctrl &= ~ACM_CTRL_DTR; 1076 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1077 newctrl |= ACM_CTRL_DTR; 1078 } 1079 1080 if (newctrl != acm->ctrlout) 1081 acm_set_control(acm, acm->ctrlout = newctrl); 1082 1083 if (memcmp(&acm->line, &newline, sizeof newline)) { 1084 memcpy(&acm->line, &newline, sizeof newline); 1085 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1086 __func__, 1087 le32_to_cpu(newline.dwDTERate), 1088 newline.bCharFormat, newline.bParityType, 1089 newline.bDataBits); 1090 acm_set_line(acm, &acm->line); 1091 } 1092 } 1093 1094 static const struct tty_port_operations acm_port_ops = { 1095 .dtr_rts = acm_port_dtr_rts, 1096 .shutdown = acm_port_shutdown, 1097 .activate = acm_port_activate, 1098 .destruct = acm_port_destruct, 1099 }; 1100 1101 /* 1102 * USB probe and disconnect routines. 1103 */ 1104 1105 /* Little helpers: write/read buffers free */ 1106 static void acm_write_buffers_free(struct acm *acm) 1107 { 1108 int i; 1109 struct acm_wb *wb; 1110 1111 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1112 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1113 } 1114 1115 static void acm_read_buffers_free(struct acm *acm) 1116 { 1117 int i; 1118 1119 for (i = 0; i < acm->rx_buflimit; i++) 1120 usb_free_coherent(acm->dev, acm->readsize, 1121 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1122 } 1123 1124 /* Little helper: write buffers allocate */ 1125 static int acm_write_buffers_alloc(struct acm *acm) 1126 { 1127 int i; 1128 struct acm_wb *wb; 1129 1130 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1131 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1132 &wb->dmah); 1133 if (!wb->buf) { 1134 while (i != 0) { 1135 --i; 1136 --wb; 1137 usb_free_coherent(acm->dev, acm->writesize, 1138 wb->buf, wb->dmah); 1139 } 1140 return -ENOMEM; 1141 } 1142 } 1143 return 0; 1144 } 1145 1146 static int acm_probe(struct usb_interface *intf, 1147 const struct usb_device_id *id) 1148 { 1149 struct usb_cdc_union_desc *union_header = NULL; 1150 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1151 unsigned char *buffer = intf->altsetting->extra; 1152 int buflen = intf->altsetting->extralen; 1153 struct usb_interface *control_interface; 1154 struct usb_interface *data_interface; 1155 struct usb_endpoint_descriptor *epctrl = NULL; 1156 struct usb_endpoint_descriptor *epread = NULL; 1157 struct usb_endpoint_descriptor *epwrite = NULL; 1158 struct usb_device *usb_dev = interface_to_usbdev(intf); 1159 struct usb_cdc_parsed_header h; 1160 struct acm *acm; 1161 int minor; 1162 int ctrlsize, readsize; 1163 u8 *buf; 1164 int call_intf_num = -1; 1165 int data_intf_num = -1; 1166 unsigned long quirks; 1167 int num_rx_buf; 1168 int i; 1169 int combined_interfaces = 0; 1170 struct device *tty_dev; 1171 int rv = -ENOMEM; 1172 int res; 1173 1174 /* normal quirks */ 1175 quirks = (unsigned long)id->driver_info; 1176 1177 if (quirks == IGNORE_DEVICE) 1178 return -ENODEV; 1179 1180 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1181 1182 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1183 1184 /* handle quirks deadly to normal probing*/ 1185 if (quirks == NO_UNION_NORMAL) { 1186 data_interface = usb_ifnum_to_if(usb_dev, 1); 1187 control_interface = usb_ifnum_to_if(usb_dev, 0); 1188 /* we would crash */ 1189 if (!data_interface || !control_interface) 1190 return -ENODEV; 1191 goto skip_normal_probe; 1192 } 1193 1194 /* normal probing*/ 1195 if (!buffer) { 1196 dev_err(&intf->dev, "Weird descriptor references\n"); 1197 return -EINVAL; 1198 } 1199 1200 if (!buflen) { 1201 if (intf->cur_altsetting->endpoint && 1202 intf->cur_altsetting->endpoint->extralen && 1203 intf->cur_altsetting->endpoint->extra) { 1204 dev_dbg(&intf->dev, 1205 "Seeking extra descriptors on endpoint\n"); 1206 buflen = intf->cur_altsetting->endpoint->extralen; 1207 buffer = intf->cur_altsetting->endpoint->extra; 1208 } else { 1209 dev_err(&intf->dev, 1210 "Zero length descriptor references\n"); 1211 return -EINVAL; 1212 } 1213 } 1214 1215 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1216 union_header = h.usb_cdc_union_desc; 1217 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1218 if (cmgmd) 1219 call_intf_num = cmgmd->bDataInterface; 1220 1221 if (!union_header) { 1222 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1223 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1224 combined_interfaces = 1; 1225 control_interface = data_interface = intf; 1226 goto look_for_collapsed_interface; 1227 } else if (call_intf_num > 0) { 1228 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1229 data_intf_num = call_intf_num; 1230 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1231 control_interface = intf; 1232 } else { 1233 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1234 return -ENODEV; 1235 } 1236 } else { 1237 int class = -1; 1238 1239 data_intf_num = union_header->bSlaveInterface0; 1240 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1241 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1242 1243 if (control_interface) 1244 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1245 1246 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1247 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1248 combined_interfaces = 1; 1249 control_interface = data_interface = intf; 1250 goto look_for_collapsed_interface; 1251 } 1252 } 1253 1254 if (!control_interface || !data_interface) { 1255 dev_dbg(&intf->dev, "no interfaces\n"); 1256 return -ENODEV; 1257 } 1258 1259 if (data_intf_num != call_intf_num) 1260 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1261 1262 if (control_interface == data_interface) { 1263 /* some broken devices designed for windows work this way */ 1264 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1265 combined_interfaces = 1; 1266 /* a popular other OS doesn't use it */ 1267 quirks |= NO_CAP_LINE; 1268 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1269 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1270 return -EINVAL; 1271 } 1272 look_for_collapsed_interface: 1273 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1274 &epread, &epwrite, &epctrl, NULL); 1275 if (res) 1276 return res; 1277 1278 goto made_compressed_probe; 1279 } 1280 1281 skip_normal_probe: 1282 1283 /*workaround for switched interfaces */ 1284 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1285 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1286 dev_dbg(&intf->dev, 1287 "Your device has switched interfaces.\n"); 1288 swap(control_interface, data_interface); 1289 } else { 1290 return -EINVAL; 1291 } 1292 } 1293 1294 /* Accept probe requests only for the control interface */ 1295 if (!combined_interfaces && intf != control_interface) 1296 return -ENODEV; 1297 1298 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1299 /* valid in this context */ 1300 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1301 return -EBUSY; 1302 } 1303 1304 1305 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1306 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1307 return -EINVAL; 1308 1309 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1310 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1311 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1312 1313 1314 /* workaround for switched endpoints */ 1315 if (!usb_endpoint_dir_in(epread)) { 1316 /* descriptors are swapped */ 1317 dev_dbg(&intf->dev, 1318 "The data interface has switched endpoints\n"); 1319 swap(epread, epwrite); 1320 } 1321 made_compressed_probe: 1322 dev_dbg(&intf->dev, "interfaces are valid\n"); 1323 1324 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1325 if (acm == NULL) 1326 goto alloc_fail; 1327 1328 tty_port_init(&acm->port); 1329 acm->port.ops = &acm_port_ops; 1330 1331 ctrlsize = usb_endpoint_maxp(epctrl); 1332 readsize = usb_endpoint_maxp(epread) * 1333 (quirks == SINGLE_RX_URB ? 1 : 2); 1334 acm->combined_interfaces = combined_interfaces; 1335 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1336 acm->control = control_interface; 1337 acm->data = data_interface; 1338 1339 usb_get_intf(acm->control); /* undone in destruct() */ 1340 1341 minor = acm_alloc_minor(acm); 1342 if (minor < 0) 1343 goto alloc_fail1; 1344 1345 acm->minor = minor; 1346 acm->dev = usb_dev; 1347 if (h.usb_cdc_acm_descriptor) 1348 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1349 if (quirks & NO_CAP_LINE) 1350 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1351 acm->ctrlsize = ctrlsize; 1352 acm->readsize = readsize; 1353 acm->rx_buflimit = num_rx_buf; 1354 INIT_WORK(&acm->work, acm_softint); 1355 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1356 init_waitqueue_head(&acm->wioctl); 1357 spin_lock_init(&acm->write_lock); 1358 spin_lock_init(&acm->read_lock); 1359 mutex_init(&acm->mutex); 1360 if (usb_endpoint_xfer_int(epread)) { 1361 acm->bInterval = epread->bInterval; 1362 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1363 } else { 1364 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1365 } 1366 if (usb_endpoint_xfer_int(epwrite)) 1367 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1368 else 1369 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1370 init_usb_anchor(&acm->delayed); 1371 acm->quirks = quirks; 1372 1373 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1374 if (!buf) 1375 goto alloc_fail1; 1376 acm->ctrl_buffer = buf; 1377 1378 if (acm_write_buffers_alloc(acm) < 0) 1379 goto alloc_fail2; 1380 1381 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1382 if (!acm->ctrlurb) 1383 goto alloc_fail3; 1384 1385 for (i = 0; i < num_rx_buf; i++) { 1386 struct acm_rb *rb = &(acm->read_buffers[i]); 1387 struct urb *urb; 1388 1389 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1390 &rb->dma); 1391 if (!rb->base) 1392 goto alloc_fail4; 1393 rb->index = i; 1394 rb->instance = acm; 1395 1396 urb = usb_alloc_urb(0, GFP_KERNEL); 1397 if (!urb) 1398 goto alloc_fail4; 1399 1400 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1401 urb->transfer_dma = rb->dma; 1402 if (usb_endpoint_xfer_int(epread)) 1403 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1404 acm->readsize, 1405 acm_read_bulk_callback, rb, 1406 acm->bInterval); 1407 else 1408 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1409 acm->readsize, 1410 acm_read_bulk_callback, rb); 1411 1412 acm->read_urbs[i] = urb; 1413 __set_bit(i, &acm->read_urbs_free); 1414 } 1415 for (i = 0; i < ACM_NW; i++) { 1416 struct acm_wb *snd = &(acm->wb[i]); 1417 1418 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1419 if (snd->urb == NULL) 1420 goto alloc_fail5; 1421 1422 if (usb_endpoint_xfer_int(epwrite)) 1423 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1424 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1425 else 1426 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1427 NULL, acm->writesize, acm_write_bulk, snd); 1428 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1429 if (quirks & SEND_ZERO_PACKET) 1430 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1431 snd->instance = acm; 1432 } 1433 1434 usb_set_intfdata(intf, acm); 1435 1436 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1437 if (i < 0) 1438 goto alloc_fail5; 1439 1440 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1441 struct usb_cdc_country_functional_desc * cfd = 1442 h.usb_cdc_country_functional_desc; 1443 1444 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1445 if (!acm->country_codes) 1446 goto skip_countries; 1447 acm->country_code_size = cfd->bLength - 4; 1448 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1449 cfd->bLength - 4); 1450 acm->country_rel_date = cfd->iCountryCodeRelDate; 1451 1452 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1453 if (i < 0) { 1454 kfree(acm->country_codes); 1455 acm->country_codes = NULL; 1456 acm->country_code_size = 0; 1457 goto skip_countries; 1458 } 1459 1460 i = device_create_file(&intf->dev, 1461 &dev_attr_iCountryCodeRelDate); 1462 if (i < 0) { 1463 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1464 kfree(acm->country_codes); 1465 acm->country_codes = NULL; 1466 acm->country_code_size = 0; 1467 goto skip_countries; 1468 } 1469 } 1470 1471 skip_countries: 1472 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1473 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1474 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1475 /* works around buggy devices */ 1476 epctrl->bInterval ? epctrl->bInterval : 16); 1477 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1478 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1479 acm->notification_buffer = NULL; 1480 acm->nb_index = 0; 1481 acm->nb_size = 0; 1482 1483 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1484 1485 acm->line.dwDTERate = cpu_to_le32(9600); 1486 acm->line.bDataBits = 8; 1487 acm_set_line(acm, &acm->line); 1488 1489 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1490 usb_set_intfdata(data_interface, acm); 1491 1492 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1493 &control_interface->dev); 1494 if (IS_ERR(tty_dev)) { 1495 rv = PTR_ERR(tty_dev); 1496 goto alloc_fail6; 1497 } 1498 1499 if (quirks & CLEAR_HALT_CONDITIONS) { 1500 usb_clear_halt(usb_dev, acm->in); 1501 usb_clear_halt(usb_dev, acm->out); 1502 } 1503 1504 return 0; 1505 alloc_fail6: 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 kfree(acm->country_codes); 1512 } 1513 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1514 alloc_fail5: 1515 usb_set_intfdata(intf, NULL); 1516 for (i = 0; i < ACM_NW; i++) 1517 usb_free_urb(acm->wb[i].urb); 1518 alloc_fail4: 1519 for (i = 0; i < num_rx_buf; i++) 1520 usb_free_urb(acm->read_urbs[i]); 1521 acm_read_buffers_free(acm); 1522 usb_free_urb(acm->ctrlurb); 1523 alloc_fail3: 1524 acm_write_buffers_free(acm); 1525 alloc_fail2: 1526 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1527 alloc_fail1: 1528 tty_port_put(&acm->port); 1529 alloc_fail: 1530 return rv; 1531 } 1532 1533 static void acm_disconnect(struct usb_interface *intf) 1534 { 1535 struct acm *acm = usb_get_intfdata(intf); 1536 struct tty_struct *tty; 1537 int i; 1538 1539 /* sibling interface is already cleaning up */ 1540 if (!acm) 1541 return; 1542 1543 mutex_lock(&acm->mutex); 1544 acm->disconnected = true; 1545 if (acm->country_codes) { 1546 device_remove_file(&acm->control->dev, 1547 &dev_attr_wCountryCodes); 1548 device_remove_file(&acm->control->dev, 1549 &dev_attr_iCountryCodeRelDate); 1550 } 1551 wake_up_all(&acm->wioctl); 1552 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1553 usb_set_intfdata(acm->control, NULL); 1554 usb_set_intfdata(acm->data, NULL); 1555 mutex_unlock(&acm->mutex); 1556 1557 tty = tty_port_tty_get(&acm->port); 1558 if (tty) { 1559 tty_vhangup(tty); 1560 tty_kref_put(tty); 1561 } 1562 1563 acm_kill_urbs(acm); 1564 cancel_work_sync(&acm->work); 1565 cancel_delayed_work_sync(&acm->dwork); 1566 1567 tty_unregister_device(acm_tty_driver, acm->minor); 1568 1569 usb_free_urb(acm->ctrlurb); 1570 for (i = 0; i < ACM_NW; i++) 1571 usb_free_urb(acm->wb[i].urb); 1572 for (i = 0; i < acm->rx_buflimit; i++) 1573 usb_free_urb(acm->read_urbs[i]); 1574 acm_write_buffers_free(acm); 1575 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1576 acm_read_buffers_free(acm); 1577 1578 kfree(acm->notification_buffer); 1579 1580 if (!acm->combined_interfaces) 1581 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1582 acm->data : acm->control); 1583 1584 tty_port_put(&acm->port); 1585 } 1586 1587 #ifdef CONFIG_PM 1588 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1589 { 1590 struct acm *acm = usb_get_intfdata(intf); 1591 int cnt; 1592 1593 spin_lock_irq(&acm->write_lock); 1594 if (PMSG_IS_AUTO(message)) { 1595 if (acm->transmitting) { 1596 spin_unlock_irq(&acm->write_lock); 1597 return -EBUSY; 1598 } 1599 } 1600 cnt = acm->susp_count++; 1601 spin_unlock_irq(&acm->write_lock); 1602 1603 if (cnt) 1604 return 0; 1605 1606 acm_kill_urbs(acm); 1607 cancel_work_sync(&acm->work); 1608 cancel_delayed_work_sync(&acm->dwork); 1609 acm->urbs_in_error_delay = 0; 1610 1611 return 0; 1612 } 1613 1614 static int acm_resume(struct usb_interface *intf) 1615 { 1616 struct acm *acm = usb_get_intfdata(intf); 1617 struct urb *urb; 1618 int rv = 0; 1619 1620 spin_lock_irq(&acm->write_lock); 1621 1622 if (--acm->susp_count) 1623 goto out; 1624 1625 if (tty_port_initialized(&acm->port)) { 1626 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1627 1628 for (;;) { 1629 urb = usb_get_from_anchor(&acm->delayed); 1630 if (!urb) 1631 break; 1632 1633 acm_start_wb(acm, urb->context); 1634 } 1635 1636 /* 1637 * delayed error checking because we must 1638 * do the write path at all cost 1639 */ 1640 if (rv < 0) 1641 goto out; 1642 1643 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1644 } 1645 out: 1646 spin_unlock_irq(&acm->write_lock); 1647 1648 return rv; 1649 } 1650 1651 static int acm_reset_resume(struct usb_interface *intf) 1652 { 1653 struct acm *acm = usb_get_intfdata(intf); 1654 1655 if (tty_port_initialized(&acm->port)) 1656 tty_port_tty_hangup(&acm->port, false); 1657 1658 return acm_resume(intf); 1659 } 1660 1661 #endif /* CONFIG_PM */ 1662 1663 static int acm_pre_reset(struct usb_interface *intf) 1664 { 1665 struct acm *acm = usb_get_intfdata(intf); 1666 1667 clear_bit(EVENT_RX_STALL, &acm->flags); 1668 acm->nb_index = 0; /* pending control transfers are lost */ 1669 1670 return 0; 1671 } 1672 1673 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1674 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1675 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1676 USB_CDC_ACM_PROTO_VENDOR) 1677 1678 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1679 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1680 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1681 USB_CDC_ACM_PROTO_VENDOR) 1682 1683 /* 1684 * USB driver structure. 1685 */ 1686 1687 static const struct usb_device_id acm_ids[] = { 1688 /* quirky and broken devices */ 1689 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1690 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1691 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1692 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1693 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1694 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1695 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1696 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1697 }, 1698 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1699 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1700 }, 1701 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1702 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1703 }, 1704 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1705 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1706 }, 1707 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1708 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1709 }, 1710 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1711 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1712 }, 1713 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1714 .driver_info = SINGLE_RX_URB, 1715 }, 1716 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1717 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1718 }, 1719 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1720 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1721 }, 1722 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1723 .driver_info = SINGLE_RX_URB, 1724 }, 1725 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1726 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1727 }, 1728 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1729 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1730 }, 1731 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1732 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1733 }, 1734 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1735 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1736 }, 1737 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1738 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1739 }, 1740 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1741 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1742 }, 1743 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1744 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1745 }, 1746 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1747 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1748 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1749 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1750 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1751 }, 1752 /* Motorola H24 HSPA module: */ 1753 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1754 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1755 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1756 }, 1757 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1758 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1759 }, 1760 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1761 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1762 }, 1763 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1764 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1765 }, 1766 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1767 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1768 }, 1769 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1770 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1771 }, 1772 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1773 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1774 }, 1775 1776 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1777 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1778 data interface instead of 1779 communications interface. 1780 Maybe we should define a new 1781 quirk for this. */ 1782 }, 1783 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1784 .driver_info = NO_UNION_NORMAL, 1785 }, 1786 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1787 .driver_info = NO_UNION_NORMAL, 1788 }, 1789 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1790 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1791 }, 1792 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1793 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1794 }, 1795 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1796 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1797 }, 1798 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1799 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1800 }, 1801 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1802 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1803 }, 1804 1805 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1806 .driver_info = CLEAR_HALT_CONDITIONS, 1807 }, 1808 1809 /* Nokia S60 phones expose two ACM channels. The first is 1810 * a modem and is picked up by the standard AT-command 1811 * information below. The second is 'vendor-specific' but 1812 * is treated as a serial device at the S60 end, so we want 1813 * to expose it on Linux too. */ 1814 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1815 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1816 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1817 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1818 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1820 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1821 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1822 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1823 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1824 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1825 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1826 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1827 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1828 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1829 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1830 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1871 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1872 1873 /* Support for Owen devices */ 1874 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1875 1876 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1877 1878 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1879 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1880 .driver_info = IGNORE_DEVICE, 1881 }, 1882 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1883 .driver_info = IGNORE_DEVICE, 1884 }, 1885 #endif 1886 1887 #if IS_ENABLED(CONFIG_IR_TOY) 1888 { USB_DEVICE(0x04d8, 0xfd08), 1889 .driver_info = IGNORE_DEVICE, 1890 }, 1891 #endif 1892 1893 /*Samsung phone in firmware update mode */ 1894 { USB_DEVICE(0x04e8, 0x685d), 1895 .driver_info = IGNORE_DEVICE, 1896 }, 1897 1898 /* Exclude Infineon Flash Loader utility */ 1899 { USB_DEVICE(0x058b, 0x0041), 1900 .driver_info = IGNORE_DEVICE, 1901 }, 1902 1903 /* Exclude ETAS ES58x */ 1904 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 1905 .driver_info = IGNORE_DEVICE, 1906 }, 1907 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 1908 .driver_info = IGNORE_DEVICE, 1909 }, 1910 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 1911 .driver_info = IGNORE_DEVICE, 1912 }, 1913 1914 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1915 .driver_info = SEND_ZERO_PACKET, 1916 }, 1917 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1918 .driver_info = SEND_ZERO_PACKET, 1919 }, 1920 1921 /* control interfaces without any protocol set */ 1922 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1923 USB_CDC_PROTO_NONE) }, 1924 1925 /* control interfaces with various AT-command sets */ 1926 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1927 USB_CDC_ACM_PROTO_AT_V25TER) }, 1928 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1929 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1930 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1931 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1932 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1933 USB_CDC_ACM_PROTO_AT_GSM) }, 1934 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1935 USB_CDC_ACM_PROTO_AT_3G) }, 1936 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1937 USB_CDC_ACM_PROTO_AT_CDMA) }, 1938 1939 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1940 .driver_info = SEND_ZERO_PACKET, 1941 }, 1942 1943 { } 1944 }; 1945 1946 MODULE_DEVICE_TABLE(usb, acm_ids); 1947 1948 static struct usb_driver acm_driver = { 1949 .name = "cdc_acm", 1950 .probe = acm_probe, 1951 .disconnect = acm_disconnect, 1952 #ifdef CONFIG_PM 1953 .suspend = acm_suspend, 1954 .resume = acm_resume, 1955 .reset_resume = acm_reset_resume, 1956 #endif 1957 .pre_reset = acm_pre_reset, 1958 .id_table = acm_ids, 1959 #ifdef CONFIG_PM 1960 .supports_autosuspend = 1, 1961 #endif 1962 .disable_hub_initiated_lpm = 1, 1963 }; 1964 1965 /* 1966 * TTY driver structures. 1967 */ 1968 1969 static const struct tty_operations acm_ops = { 1970 .install = acm_tty_install, 1971 .open = acm_tty_open, 1972 .close = acm_tty_close, 1973 .cleanup = acm_tty_cleanup, 1974 .hangup = acm_tty_hangup, 1975 .write = acm_tty_write, 1976 .write_room = acm_tty_write_room, 1977 .ioctl = acm_tty_ioctl, 1978 .throttle = acm_tty_throttle, 1979 .unthrottle = acm_tty_unthrottle, 1980 .chars_in_buffer = acm_tty_chars_in_buffer, 1981 .break_ctl = acm_tty_break_ctl, 1982 .set_termios = acm_tty_set_termios, 1983 .tiocmget = acm_tty_tiocmget, 1984 .tiocmset = acm_tty_tiocmset, 1985 .get_serial = get_serial_info, 1986 .set_serial = set_serial_info, 1987 .get_icount = acm_tty_get_icount, 1988 }; 1989 1990 /* 1991 * Init / exit. 1992 */ 1993 1994 static int __init acm_init(void) 1995 { 1996 int retval; 1997 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1998 if (!acm_tty_driver) 1999 return -ENOMEM; 2000 acm_tty_driver->driver_name = "acm", 2001 acm_tty_driver->name = "ttyACM", 2002 acm_tty_driver->major = ACM_TTY_MAJOR, 2003 acm_tty_driver->minor_start = 0, 2004 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2005 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2006 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2007 acm_tty_driver->init_termios = tty_std_termios; 2008 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2009 HUPCL | CLOCAL; 2010 tty_set_operations(acm_tty_driver, &acm_ops); 2011 2012 retval = tty_register_driver(acm_tty_driver); 2013 if (retval) { 2014 put_tty_driver(acm_tty_driver); 2015 return retval; 2016 } 2017 2018 retval = usb_register(&acm_driver); 2019 if (retval) { 2020 tty_unregister_driver(acm_tty_driver); 2021 put_tty_driver(acm_tty_driver); 2022 return retval; 2023 } 2024 2025 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2026 2027 return 0; 2028 } 2029 2030 static void __exit acm_exit(void) 2031 { 2032 usb_deregister(&acm_driver); 2033 tty_unregister_driver(acm_tty_driver); 2034 put_tty_driver(acm_tty_driver); 2035 idr_destroy(&acm_minors); 2036 } 2037 2038 module_init(acm_init); 2039 module_exit(acm_exit); 2040 2041 MODULE_AUTHOR(DRIVER_AUTHOR); 2042 MODULE_DESCRIPTION(DRIVER_DESC); 2043 MODULE_LICENSE("GPL"); 2044 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2045