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 = 1; 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 n -= acm->wb[i].use; 195 spin_unlock_irqrestore(&acm->write_lock, flags); 196 return n; 197 } 198 199 /* 200 * Finish write. Caller must hold acm->write_lock 201 */ 202 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 203 { 204 wb->use = 0; 205 acm->transmitting--; 206 usb_autopm_put_interface_async(acm->control); 207 } 208 209 /* 210 * Poke write. 211 * 212 * the caller is responsible for locking 213 */ 214 215 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 216 { 217 int rc; 218 219 acm->transmitting++; 220 221 wb->urb->transfer_buffer = wb->buf; 222 wb->urb->transfer_dma = wb->dmah; 223 wb->urb->transfer_buffer_length = wb->len; 224 wb->urb->dev = acm->dev; 225 226 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 227 if (rc < 0) { 228 dev_err(&acm->data->dev, 229 "%s - usb_submit_urb(write bulk) failed: %d\n", 230 __func__, rc); 231 acm_write_done(acm, wb); 232 } 233 return rc; 234 } 235 236 /* 237 * attributes exported through sysfs 238 */ 239 static ssize_t bmCapabilities_show 240 (struct device *dev, struct device_attribute *attr, char *buf) 241 { 242 struct usb_interface *intf = to_usb_interface(dev); 243 struct acm *acm = usb_get_intfdata(intf); 244 245 return sprintf(buf, "%d", acm->ctrl_caps); 246 } 247 static DEVICE_ATTR_RO(bmCapabilities); 248 249 static ssize_t wCountryCodes_show 250 (struct device *dev, struct device_attribute *attr, char *buf) 251 { 252 struct usb_interface *intf = to_usb_interface(dev); 253 struct acm *acm = usb_get_intfdata(intf); 254 255 memcpy(buf, acm->country_codes, acm->country_code_size); 256 return acm->country_code_size; 257 } 258 259 static DEVICE_ATTR_RO(wCountryCodes); 260 261 static ssize_t iCountryCodeRelDate_show 262 (struct device *dev, struct device_attribute *attr, char *buf) 263 { 264 struct usb_interface *intf = to_usb_interface(dev); 265 struct acm *acm = usb_get_intfdata(intf); 266 267 return sprintf(buf, "%d", acm->country_rel_date); 268 } 269 270 static DEVICE_ATTR_RO(iCountryCodeRelDate); 271 /* 272 * Interrupt handlers for various ACM device responses 273 */ 274 275 static void acm_process_notification(struct acm *acm, unsigned char *buf) 276 { 277 int newctrl; 278 int difference; 279 unsigned long flags; 280 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 281 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 282 283 switch (dr->bNotificationType) { 284 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 285 dev_dbg(&acm->control->dev, 286 "%s - network connection: %d\n", __func__, dr->wValue); 287 break; 288 289 case USB_CDC_NOTIFY_SERIAL_STATE: 290 if (le16_to_cpu(dr->wLength) != 2) { 291 dev_dbg(&acm->control->dev, 292 "%s - malformed serial state\n", __func__); 293 break; 294 } 295 296 newctrl = get_unaligned_le16(data); 297 dev_dbg(&acm->control->dev, 298 "%s - serial state: 0x%x\n", __func__, newctrl); 299 300 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 301 dev_dbg(&acm->control->dev, 302 "%s - calling hangup\n", __func__); 303 tty_port_tty_hangup(&acm->port, false); 304 } 305 306 difference = acm->ctrlin ^ newctrl; 307 spin_lock_irqsave(&acm->read_lock, flags); 308 acm->ctrlin = newctrl; 309 acm->oldcount = acm->iocount; 310 311 if (difference & ACM_CTRL_DSR) 312 acm->iocount.dsr++; 313 if (difference & ACM_CTRL_DCD) 314 acm->iocount.dcd++; 315 if (newctrl & ACM_CTRL_BRK) 316 acm->iocount.brk++; 317 if (newctrl & ACM_CTRL_RI) 318 acm->iocount.rng++; 319 if (newctrl & ACM_CTRL_FRAMING) 320 acm->iocount.frame++; 321 if (newctrl & ACM_CTRL_PARITY) 322 acm->iocount.parity++; 323 if (newctrl & ACM_CTRL_OVERRUN) 324 acm->iocount.overrun++; 325 spin_unlock_irqrestore(&acm->read_lock, flags); 326 327 if (difference) 328 wake_up_all(&acm->wioctl); 329 330 break; 331 332 default: 333 dev_dbg(&acm->control->dev, 334 "%s - unknown notification %d received: index %d len %d\n", 335 __func__, 336 dr->bNotificationType, dr->wIndex, dr->wLength); 337 } 338 } 339 340 /* control interface reports status changes with "interrupt" transfers */ 341 static void acm_ctrl_irq(struct urb *urb) 342 { 343 struct acm *acm = urb->context; 344 struct usb_cdc_notification *dr = urb->transfer_buffer; 345 unsigned int current_size = urb->actual_length; 346 unsigned int expected_size, copy_size, alloc_size; 347 int retval; 348 int status = urb->status; 349 350 switch (status) { 351 case 0: 352 /* success */ 353 break; 354 case -ECONNRESET: 355 case -ENOENT: 356 case -ESHUTDOWN: 357 /* this urb is terminated, clean up */ 358 dev_dbg(&acm->control->dev, 359 "%s - urb shutting down with status: %d\n", 360 __func__, status); 361 return; 362 default: 363 dev_dbg(&acm->control->dev, 364 "%s - nonzero urb status received: %d\n", 365 __func__, status); 366 goto exit; 367 } 368 369 usb_mark_last_busy(acm->dev); 370 371 if (acm->nb_index) 372 dr = (struct usb_cdc_notification *)acm->notification_buffer; 373 374 /* size = notification-header + (optional) data */ 375 expected_size = sizeof(struct usb_cdc_notification) + 376 le16_to_cpu(dr->wLength); 377 378 if (current_size < expected_size) { 379 /* notification is transmitted fragmented, reassemble */ 380 if (acm->nb_size < expected_size) { 381 u8 *new_buffer; 382 alloc_size = roundup_pow_of_two(expected_size); 383 /* Final freeing is done on disconnect. */ 384 new_buffer = krealloc(acm->notification_buffer, 385 alloc_size, GFP_ATOMIC); 386 if (!new_buffer) { 387 acm->nb_index = 0; 388 goto exit; 389 } 390 391 acm->notification_buffer = new_buffer; 392 acm->nb_size = alloc_size; 393 dr = (struct usb_cdc_notification *)acm->notification_buffer; 394 } 395 396 copy_size = min(current_size, 397 expected_size - acm->nb_index); 398 399 memcpy(&acm->notification_buffer[acm->nb_index], 400 urb->transfer_buffer, copy_size); 401 acm->nb_index += copy_size; 402 current_size = acm->nb_index; 403 } 404 405 if (current_size >= expected_size) { 406 /* notification complete */ 407 acm_process_notification(acm, (unsigned char *)dr); 408 acm->nb_index = 0; 409 } 410 411 exit: 412 retval = usb_submit_urb(urb, GFP_ATOMIC); 413 if (retval && retval != -EPERM && retval != -ENODEV) 414 dev_err(&acm->control->dev, 415 "%s - usb_submit_urb failed: %d\n", __func__, retval); 416 else 417 dev_vdbg(&acm->control->dev, 418 "control resubmission terminated %d\n", retval); 419 } 420 421 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 422 { 423 int res; 424 425 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 426 return 0; 427 428 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 429 if (res) { 430 if (res != -EPERM && res != -ENODEV) { 431 dev_err(&acm->data->dev, 432 "urb %d failed submission with %d\n", 433 index, res); 434 } else { 435 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 436 } 437 set_bit(index, &acm->read_urbs_free); 438 return res; 439 } else { 440 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 441 } 442 443 return 0; 444 } 445 446 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 447 { 448 int res; 449 int i; 450 451 for (i = 0; i < acm->rx_buflimit; ++i) { 452 res = acm_submit_read_urb(acm, i, mem_flags); 453 if (res) 454 return res; 455 } 456 457 return 0; 458 } 459 460 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 461 { 462 if (!urb->actual_length) 463 return; 464 465 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 466 urb->actual_length); 467 tty_flip_buffer_push(&acm->port); 468 } 469 470 static void acm_read_bulk_callback(struct urb *urb) 471 { 472 struct acm_rb *rb = urb->context; 473 struct acm *acm = rb->instance; 474 int status = urb->status; 475 bool stopped = false; 476 bool stalled = false; 477 bool cooldown = false; 478 479 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 480 rb->index, urb->actual_length, status); 481 482 if (!acm->dev) { 483 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 484 return; 485 } 486 487 switch (status) { 488 case 0: 489 usb_mark_last_busy(acm->dev); 490 acm_process_read_urb(acm, urb); 491 break; 492 case -EPIPE: 493 set_bit(EVENT_RX_STALL, &acm->flags); 494 stalled = true; 495 break; 496 case -ENOENT: 497 case -ECONNRESET: 498 case -ESHUTDOWN: 499 dev_dbg(&acm->data->dev, 500 "%s - urb shutting down with status: %d\n", 501 __func__, status); 502 stopped = true; 503 break; 504 case -EOVERFLOW: 505 case -EPROTO: 506 dev_dbg(&acm->data->dev, 507 "%s - cooling babbling device\n", __func__); 508 usb_mark_last_busy(acm->dev); 509 set_bit(rb->index, &acm->urbs_in_error_delay); 510 cooldown = true; 511 break; 512 default: 513 dev_dbg(&acm->data->dev, 514 "%s - nonzero urb status received: %d\n", 515 __func__, status); 516 break; 517 } 518 519 /* 520 * Make sure URB processing is done before marking as free to avoid 521 * racing with unthrottle() on another CPU. Matches the barriers 522 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 523 */ 524 smp_mb__before_atomic(); 525 set_bit(rb->index, &acm->read_urbs_free); 526 /* 527 * Make sure URB is marked as free before checking the throttled flag 528 * to avoid racing with unthrottle() on another CPU. Matches the 529 * smp_mb() in unthrottle(). 530 */ 531 smp_mb__after_atomic(); 532 533 if (stopped || stalled || cooldown) { 534 if (stalled) 535 schedule_work(&acm->work); 536 else if (cooldown) 537 schedule_delayed_work(&acm->dwork, HZ / 2); 538 return; 539 } 540 541 if (test_bit(ACM_THROTTLED, &acm->flags)) 542 return; 543 544 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 545 } 546 547 /* data interface wrote those outgoing bytes */ 548 static void acm_write_bulk(struct urb *urb) 549 { 550 struct acm_wb *wb = urb->context; 551 struct acm *acm = wb->instance; 552 unsigned long flags; 553 int status = urb->status; 554 555 if (status || (urb->actual_length != urb->transfer_buffer_length)) 556 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 557 urb->actual_length, 558 urb->transfer_buffer_length, 559 status); 560 561 spin_lock_irqsave(&acm->write_lock, flags); 562 acm_write_done(acm, wb); 563 spin_unlock_irqrestore(&acm->write_lock, flags); 564 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 565 schedule_work(&acm->work); 566 } 567 568 static void acm_softint(struct work_struct *work) 569 { 570 int i; 571 struct acm *acm = container_of(work, struct acm, work); 572 573 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 574 smp_mb(); /* against acm_suspend() */ 575 if (!acm->susp_count) { 576 for (i = 0; i < acm->rx_buflimit; i++) 577 usb_kill_urb(acm->read_urbs[i]); 578 usb_clear_halt(acm->dev, acm->in); 579 acm_submit_read_urbs(acm, GFP_KERNEL); 580 clear_bit(EVENT_RX_STALL, &acm->flags); 581 } 582 } 583 584 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 585 for (i = 0; i < acm->rx_buflimit; i++) 586 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 587 acm_submit_read_urb(acm, i, GFP_NOIO); 588 } 589 590 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 591 tty_port_tty_wakeup(&acm->port); 592 } 593 594 /* 595 * TTY handlers 596 */ 597 598 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 599 { 600 struct acm *acm; 601 int retval; 602 603 acm = acm_get_by_minor(tty->index); 604 if (!acm) 605 return -ENODEV; 606 607 retval = tty_standard_install(driver, tty); 608 if (retval) 609 goto error_init_termios; 610 611 /* 612 * Suppress initial echoing for some devices which might send data 613 * immediately after acm driver has been installed. 614 */ 615 if (acm->quirks & DISABLE_ECHO) 616 tty->termios.c_lflag &= ~ECHO; 617 618 tty->driver_data = acm; 619 620 return 0; 621 622 error_init_termios: 623 tty_port_put(&acm->port); 624 return retval; 625 } 626 627 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 628 { 629 struct acm *acm = tty->driver_data; 630 631 return tty_port_open(&acm->port, tty, filp); 632 } 633 634 static void acm_port_dtr_rts(struct tty_port *port, int raise) 635 { 636 struct acm *acm = container_of(port, struct acm, port); 637 int val; 638 int res; 639 640 if (raise) 641 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 642 else 643 val = 0; 644 645 /* FIXME: add missing ctrlout locking throughout driver */ 646 acm->ctrlout = val; 647 648 res = acm_set_control(acm, val); 649 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 650 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 651 } 652 653 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 654 { 655 struct acm *acm = container_of(port, struct acm, port); 656 int retval = -ENODEV; 657 int i; 658 659 mutex_lock(&acm->mutex); 660 if (acm->disconnected) 661 goto disconnected; 662 663 retval = usb_autopm_get_interface(acm->control); 664 if (retval) 665 goto error_get_interface; 666 667 /* 668 * FIXME: Why do we need this? Allocating 64K of physically contiguous 669 * memory is really nasty... 670 */ 671 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 672 acm->control->needs_remote_wakeup = 1; 673 674 acm->ctrlurb->dev = acm->dev; 675 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 676 if (retval) { 677 dev_err(&acm->control->dev, 678 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 679 goto error_submit_urb; 680 } 681 682 acm_tty_set_termios(tty, NULL); 683 684 /* 685 * Unthrottle device in case the TTY was closed while throttled. 686 */ 687 clear_bit(ACM_THROTTLED, &acm->flags); 688 689 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 690 if (retval) 691 goto error_submit_read_urbs; 692 693 usb_autopm_put_interface(acm->control); 694 695 mutex_unlock(&acm->mutex); 696 697 return 0; 698 699 error_submit_read_urbs: 700 for (i = 0; i < acm->rx_buflimit; i++) 701 usb_kill_urb(acm->read_urbs[i]); 702 usb_kill_urb(acm->ctrlurb); 703 error_submit_urb: 704 usb_autopm_put_interface(acm->control); 705 error_get_interface: 706 disconnected: 707 mutex_unlock(&acm->mutex); 708 709 return usb_translate_errors(retval); 710 } 711 712 static void acm_port_destruct(struct tty_port *port) 713 { 714 struct acm *acm = container_of(port, struct acm, port); 715 716 acm_release_minor(acm); 717 usb_put_intf(acm->control); 718 kfree(acm->country_codes); 719 kfree(acm); 720 } 721 722 static void acm_port_shutdown(struct tty_port *port) 723 { 724 struct acm *acm = container_of(port, struct acm, port); 725 struct urb *urb; 726 struct acm_wb *wb; 727 728 /* 729 * Need to grab write_lock to prevent race with resume, but no need to 730 * hold it due to the tty-port initialised flag. 731 */ 732 spin_lock_irq(&acm->write_lock); 733 spin_unlock_irq(&acm->write_lock); 734 735 usb_autopm_get_interface_no_resume(acm->control); 736 acm->control->needs_remote_wakeup = 0; 737 usb_autopm_put_interface(acm->control); 738 739 for (;;) { 740 urb = usb_get_from_anchor(&acm->delayed); 741 if (!urb) 742 break; 743 wb = urb->context; 744 wb->use = 0; 745 usb_autopm_put_interface_async(acm->control); 746 } 747 748 acm_kill_urbs(acm); 749 } 750 751 static void acm_tty_cleanup(struct tty_struct *tty) 752 { 753 struct acm *acm = tty->driver_data; 754 755 tty_port_put(&acm->port); 756 } 757 758 static void acm_tty_hangup(struct tty_struct *tty) 759 { 760 struct acm *acm = tty->driver_data; 761 762 tty_port_hangup(&acm->port); 763 } 764 765 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 766 { 767 struct acm *acm = tty->driver_data; 768 769 tty_port_close(&acm->port, tty, filp); 770 } 771 772 static int acm_tty_write(struct tty_struct *tty, 773 const unsigned char *buf, int count) 774 { 775 struct acm *acm = tty->driver_data; 776 int stat; 777 unsigned long flags; 778 int wbn; 779 struct acm_wb *wb; 780 781 if (!count) 782 return 0; 783 784 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 785 786 spin_lock_irqsave(&acm->write_lock, flags); 787 wbn = acm_wb_alloc(acm); 788 if (wbn < 0) { 789 spin_unlock_irqrestore(&acm->write_lock, flags); 790 return 0; 791 } 792 wb = &acm->wb[wbn]; 793 794 if (!acm->dev) { 795 wb->use = 0; 796 spin_unlock_irqrestore(&acm->write_lock, flags); 797 return -ENODEV; 798 } 799 800 count = (count > acm->writesize) ? acm->writesize : count; 801 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 802 memcpy(wb->buf, buf, count); 803 wb->len = count; 804 805 stat = usb_autopm_get_interface_async(acm->control); 806 if (stat) { 807 wb->use = 0; 808 spin_unlock_irqrestore(&acm->write_lock, flags); 809 return stat; 810 } 811 812 if (acm->susp_count) { 813 usb_anchor_urb(wb->urb, &acm->delayed); 814 spin_unlock_irqrestore(&acm->write_lock, flags); 815 return count; 816 } 817 818 stat = acm_start_wb(acm, wb); 819 spin_unlock_irqrestore(&acm->write_lock, flags); 820 821 if (stat < 0) 822 return stat; 823 return count; 824 } 825 826 static int acm_tty_write_room(struct tty_struct *tty) 827 { 828 struct acm *acm = tty->driver_data; 829 /* 830 * Do not let the line discipline to know that we have a reserve, 831 * or it might get too enthusiastic. 832 */ 833 return acm_wb_is_avail(acm) ? acm->writesize : 0; 834 } 835 836 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 837 { 838 struct acm *acm = tty->driver_data; 839 /* 840 * if the device was unplugged then any remaining characters fell out 841 * of the connector ;) 842 */ 843 if (acm->disconnected) 844 return 0; 845 /* 846 * This is inaccurate (overcounts), but it works. 847 */ 848 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 849 } 850 851 static void acm_tty_throttle(struct tty_struct *tty) 852 { 853 struct acm *acm = tty->driver_data; 854 855 set_bit(ACM_THROTTLED, &acm->flags); 856 } 857 858 static void acm_tty_unthrottle(struct tty_struct *tty) 859 { 860 struct acm *acm = tty->driver_data; 861 862 clear_bit(ACM_THROTTLED, &acm->flags); 863 864 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 865 smp_mb(); 866 867 acm_submit_read_urbs(acm, GFP_KERNEL); 868 } 869 870 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 871 { 872 struct acm *acm = tty->driver_data; 873 int retval; 874 875 retval = acm_send_break(acm, state ? 0xffff : 0); 876 if (retval < 0) 877 dev_dbg(&acm->control->dev, 878 "%s - send break failed\n", __func__); 879 return retval; 880 } 881 882 static int acm_tty_tiocmget(struct tty_struct *tty) 883 { 884 struct acm *acm = tty->driver_data; 885 886 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 887 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 888 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 889 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 890 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 891 TIOCM_CTS; 892 } 893 894 static int acm_tty_tiocmset(struct tty_struct *tty, 895 unsigned int set, unsigned int clear) 896 { 897 struct acm *acm = tty->driver_data; 898 unsigned int newctrl; 899 900 newctrl = acm->ctrlout; 901 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 902 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 903 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 904 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 905 906 newctrl = (newctrl & ~clear) | set; 907 908 if (acm->ctrlout == newctrl) 909 return 0; 910 return acm_set_control(acm, acm->ctrlout = newctrl); 911 } 912 913 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 914 { 915 struct acm *acm = tty->driver_data; 916 917 ss->xmit_fifo_size = acm->writesize; 918 ss->baud_base = le32_to_cpu(acm->line.dwDTERate); 919 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 920 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 921 ASYNC_CLOSING_WAIT_NONE : 922 jiffies_to_msecs(acm->port.closing_wait) / 10; 923 return 0; 924 } 925 926 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 927 { 928 struct acm *acm = tty->driver_data; 929 unsigned int closing_wait, close_delay; 930 unsigned int old_closing_wait, old_close_delay; 931 int retval = 0; 932 933 close_delay = msecs_to_jiffies(ss->close_delay * 10); 934 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 935 ASYNC_CLOSING_WAIT_NONE : 936 msecs_to_jiffies(ss->closing_wait * 10); 937 938 /* we must redo the rounding here, so that the values match */ 939 old_close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 940 old_closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 941 ASYNC_CLOSING_WAIT_NONE : 942 jiffies_to_msecs(acm->port.closing_wait) / 10; 943 944 mutex_lock(&acm->port.mutex); 945 946 if (!capable(CAP_SYS_ADMIN)) { 947 if ((ss->close_delay != old_close_delay) || 948 (ss->closing_wait != old_closing_wait)) 949 retval = -EPERM; 950 else 951 retval = -EOPNOTSUPP; 952 } else { 953 acm->port.close_delay = close_delay; 954 acm->port.closing_wait = closing_wait; 955 } 956 957 mutex_unlock(&acm->port.mutex); 958 return retval; 959 } 960 961 static int wait_serial_change(struct acm *acm, unsigned long arg) 962 { 963 int rv = 0; 964 DECLARE_WAITQUEUE(wait, current); 965 struct async_icount old, new; 966 967 do { 968 spin_lock_irq(&acm->read_lock); 969 old = acm->oldcount; 970 new = acm->iocount; 971 acm->oldcount = new; 972 spin_unlock_irq(&acm->read_lock); 973 974 if ((arg & TIOCM_DSR) && 975 old.dsr != new.dsr) 976 break; 977 if ((arg & TIOCM_CD) && 978 old.dcd != new.dcd) 979 break; 980 if ((arg & TIOCM_RI) && 981 old.rng != new.rng) 982 break; 983 984 add_wait_queue(&acm->wioctl, &wait); 985 set_current_state(TASK_INTERRUPTIBLE); 986 schedule(); 987 remove_wait_queue(&acm->wioctl, &wait); 988 if (acm->disconnected) { 989 if (arg & TIOCM_CD) 990 break; 991 else 992 rv = -ENODEV; 993 } else { 994 if (signal_pending(current)) 995 rv = -ERESTARTSYS; 996 } 997 } while (!rv); 998 999 1000 1001 return rv; 1002 } 1003 1004 static int acm_tty_get_icount(struct tty_struct *tty, 1005 struct serial_icounter_struct *icount) 1006 { 1007 struct acm *acm = tty->driver_data; 1008 1009 icount->dsr = acm->iocount.dsr; 1010 icount->rng = acm->iocount.rng; 1011 icount->dcd = acm->iocount.dcd; 1012 icount->frame = acm->iocount.frame; 1013 icount->overrun = acm->iocount.overrun; 1014 icount->parity = acm->iocount.parity; 1015 icount->brk = acm->iocount.brk; 1016 1017 return 0; 1018 } 1019 1020 static int acm_tty_ioctl(struct tty_struct *tty, 1021 unsigned int cmd, unsigned long arg) 1022 { 1023 struct acm *acm = tty->driver_data; 1024 int rv = -ENOIOCTLCMD; 1025 1026 switch (cmd) { 1027 case TIOCMIWAIT: 1028 rv = usb_autopm_get_interface(acm->control); 1029 if (rv < 0) { 1030 rv = -EIO; 1031 break; 1032 } 1033 rv = wait_serial_change(acm, arg); 1034 usb_autopm_put_interface(acm->control); 1035 break; 1036 } 1037 1038 return rv; 1039 } 1040 1041 static void acm_tty_set_termios(struct tty_struct *tty, 1042 struct ktermios *termios_old) 1043 { 1044 struct acm *acm = tty->driver_data; 1045 struct ktermios *termios = &tty->termios; 1046 struct usb_cdc_line_coding newline; 1047 int newctrl = acm->ctrlout; 1048 1049 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1050 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1051 newline.bParityType = termios->c_cflag & PARENB ? 1052 (termios->c_cflag & PARODD ? 1 : 2) + 1053 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1054 switch (termios->c_cflag & CSIZE) { 1055 case CS5: 1056 newline.bDataBits = 5; 1057 break; 1058 case CS6: 1059 newline.bDataBits = 6; 1060 break; 1061 case CS7: 1062 newline.bDataBits = 7; 1063 break; 1064 case CS8: 1065 default: 1066 newline.bDataBits = 8; 1067 break; 1068 } 1069 /* FIXME: Needs to clear unsupported bits in the termios */ 1070 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1071 1072 if (C_BAUD(tty) == B0) { 1073 newline.dwDTERate = acm->line.dwDTERate; 1074 newctrl &= ~ACM_CTRL_DTR; 1075 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1076 newctrl |= ACM_CTRL_DTR; 1077 } 1078 1079 if (newctrl != acm->ctrlout) 1080 acm_set_control(acm, acm->ctrlout = newctrl); 1081 1082 if (memcmp(&acm->line, &newline, sizeof newline)) { 1083 memcpy(&acm->line, &newline, sizeof newline); 1084 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1085 __func__, 1086 le32_to_cpu(newline.dwDTERate), 1087 newline.bCharFormat, newline.bParityType, 1088 newline.bDataBits); 1089 acm_set_line(acm, &acm->line); 1090 } 1091 } 1092 1093 static const struct tty_port_operations acm_port_ops = { 1094 .dtr_rts = acm_port_dtr_rts, 1095 .shutdown = acm_port_shutdown, 1096 .activate = acm_port_activate, 1097 .destruct = acm_port_destruct, 1098 }; 1099 1100 /* 1101 * USB probe and disconnect routines. 1102 */ 1103 1104 /* Little helpers: write/read buffers free */ 1105 static void acm_write_buffers_free(struct acm *acm) 1106 { 1107 int i; 1108 struct acm_wb *wb; 1109 1110 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1111 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1112 } 1113 1114 static void acm_read_buffers_free(struct acm *acm) 1115 { 1116 int i; 1117 1118 for (i = 0; i < acm->rx_buflimit; i++) 1119 usb_free_coherent(acm->dev, acm->readsize, 1120 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1121 } 1122 1123 /* Little helper: write buffers allocate */ 1124 static int acm_write_buffers_alloc(struct acm *acm) 1125 { 1126 int i; 1127 struct acm_wb *wb; 1128 1129 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1130 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1131 &wb->dmah); 1132 if (!wb->buf) { 1133 while (i != 0) { 1134 --i; 1135 --wb; 1136 usb_free_coherent(acm->dev, acm->writesize, 1137 wb->buf, wb->dmah); 1138 } 1139 return -ENOMEM; 1140 } 1141 } 1142 return 0; 1143 } 1144 1145 static int acm_probe(struct usb_interface *intf, 1146 const struct usb_device_id *id) 1147 { 1148 struct usb_cdc_union_desc *union_header = NULL; 1149 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1150 unsigned char *buffer = intf->altsetting->extra; 1151 int buflen = intf->altsetting->extralen; 1152 struct usb_interface *control_interface; 1153 struct usb_interface *data_interface; 1154 struct usb_endpoint_descriptor *epctrl = NULL; 1155 struct usb_endpoint_descriptor *epread = NULL; 1156 struct usb_endpoint_descriptor *epwrite = NULL; 1157 struct usb_device *usb_dev = interface_to_usbdev(intf); 1158 struct usb_cdc_parsed_header h; 1159 struct acm *acm; 1160 int minor; 1161 int ctrlsize, readsize; 1162 u8 *buf; 1163 int call_intf_num = -1; 1164 int data_intf_num = -1; 1165 unsigned long quirks; 1166 int num_rx_buf; 1167 int i; 1168 int combined_interfaces = 0; 1169 struct device *tty_dev; 1170 int rv = -ENOMEM; 1171 int res; 1172 1173 /* normal quirks */ 1174 quirks = (unsigned long)id->driver_info; 1175 1176 if (quirks == IGNORE_DEVICE) 1177 return -ENODEV; 1178 1179 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1180 1181 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1182 1183 /* handle quirks deadly to normal probing*/ 1184 if (quirks == NO_UNION_NORMAL) { 1185 data_interface = usb_ifnum_to_if(usb_dev, 1); 1186 control_interface = usb_ifnum_to_if(usb_dev, 0); 1187 /* we would crash */ 1188 if (!data_interface || !control_interface) 1189 return -ENODEV; 1190 goto skip_normal_probe; 1191 } 1192 1193 /* normal probing*/ 1194 if (!buffer) { 1195 dev_err(&intf->dev, "Weird descriptor references\n"); 1196 return -EINVAL; 1197 } 1198 1199 if (!intf->cur_altsetting) 1200 return -EINVAL; 1201 1202 if (!buflen) { 1203 if (intf->cur_altsetting->endpoint && 1204 intf->cur_altsetting->endpoint->extralen && 1205 intf->cur_altsetting->endpoint->extra) { 1206 dev_dbg(&intf->dev, 1207 "Seeking extra descriptors on endpoint\n"); 1208 buflen = intf->cur_altsetting->endpoint->extralen; 1209 buffer = intf->cur_altsetting->endpoint->extra; 1210 } else { 1211 dev_err(&intf->dev, 1212 "Zero length descriptor references\n"); 1213 return -EINVAL; 1214 } 1215 } 1216 1217 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1218 union_header = h.usb_cdc_union_desc; 1219 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1220 if (cmgmd) 1221 call_intf_num = cmgmd->bDataInterface; 1222 1223 if (!union_header) { 1224 if (call_intf_num > 0) { 1225 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1226 /* quirks for Droids MuIn LCD */ 1227 if (quirks & NO_DATA_INTERFACE) { 1228 data_interface = usb_ifnum_to_if(usb_dev, 0); 1229 } else { 1230 data_intf_num = call_intf_num; 1231 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1232 } 1233 control_interface = intf; 1234 } else { 1235 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1236 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1237 return -ENODEV; 1238 } else { 1239 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1240 combined_interfaces = 1; 1241 control_interface = data_interface = intf; 1242 goto look_for_collapsed_interface; 1243 } 1244 } 1245 } else { 1246 data_intf_num = union_header->bSlaveInterface0; 1247 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1248 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1249 } 1250 1251 if (!control_interface || !data_interface) { 1252 dev_dbg(&intf->dev, "no interfaces\n"); 1253 return -ENODEV; 1254 } 1255 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1256 return -ENODEV; 1257 1258 if (data_intf_num != call_intf_num) 1259 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1260 1261 if (control_interface == data_interface) { 1262 /* some broken devices designed for windows work this way */ 1263 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1264 combined_interfaces = 1; 1265 /* a popular other OS doesn't use it */ 1266 quirks |= NO_CAP_LINE; 1267 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1268 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1269 return -EINVAL; 1270 } 1271 look_for_collapsed_interface: 1272 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1273 &epread, &epwrite, &epctrl, NULL); 1274 if (res) 1275 return res; 1276 1277 goto made_compressed_probe; 1278 } 1279 1280 skip_normal_probe: 1281 1282 /*workaround for switched interfaces */ 1283 if (data_interface->cur_altsetting->desc.bInterfaceClass 1284 != CDC_DATA_INTERFACE_TYPE) { 1285 if (control_interface->cur_altsetting->desc.bInterfaceClass 1286 == CDC_DATA_INTERFACE_TYPE) { 1287 dev_dbg(&intf->dev, 1288 "Your device has switched interfaces.\n"); 1289 swap(control_interface, data_interface); 1290 } else { 1291 return -EINVAL; 1292 } 1293 } 1294 1295 /* Accept probe requests only for the control interface */ 1296 if (!combined_interfaces && intf != control_interface) 1297 return -ENODEV; 1298 1299 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1300 /* valid in this context */ 1301 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1302 return -EBUSY; 1303 } 1304 1305 1306 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1307 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1308 return -EINVAL; 1309 1310 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1311 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1312 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1313 1314 1315 /* workaround for switched endpoints */ 1316 if (!usb_endpoint_dir_in(epread)) { 1317 /* descriptors are swapped */ 1318 dev_dbg(&intf->dev, 1319 "The data interface has switched endpoints\n"); 1320 swap(epread, epwrite); 1321 } 1322 made_compressed_probe: 1323 dev_dbg(&intf->dev, "interfaces are valid\n"); 1324 1325 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1326 if (acm == NULL) 1327 goto alloc_fail; 1328 1329 tty_port_init(&acm->port); 1330 acm->port.ops = &acm_port_ops; 1331 1332 ctrlsize = usb_endpoint_maxp(epctrl); 1333 readsize = usb_endpoint_maxp(epread) * 1334 (quirks == SINGLE_RX_URB ? 1 : 2); 1335 acm->combined_interfaces = combined_interfaces; 1336 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1337 acm->control = control_interface; 1338 acm->data = data_interface; 1339 1340 usb_get_intf(acm->control); /* undone in destruct() */ 1341 1342 minor = acm_alloc_minor(acm); 1343 if (minor < 0) 1344 goto alloc_fail1; 1345 1346 acm->minor = minor; 1347 acm->dev = usb_dev; 1348 if (h.usb_cdc_acm_descriptor) 1349 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1350 if (quirks & NO_CAP_LINE) 1351 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1352 acm->ctrlsize = ctrlsize; 1353 acm->readsize = readsize; 1354 acm->rx_buflimit = num_rx_buf; 1355 INIT_WORK(&acm->work, acm_softint); 1356 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1357 init_waitqueue_head(&acm->wioctl); 1358 spin_lock_init(&acm->write_lock); 1359 spin_lock_init(&acm->read_lock); 1360 mutex_init(&acm->mutex); 1361 if (usb_endpoint_xfer_int(epread)) { 1362 acm->bInterval = epread->bInterval; 1363 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1364 } else { 1365 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1366 } 1367 if (usb_endpoint_xfer_int(epwrite)) 1368 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1369 else 1370 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1371 init_usb_anchor(&acm->delayed); 1372 acm->quirks = quirks; 1373 1374 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1375 if (!buf) 1376 goto alloc_fail1; 1377 acm->ctrl_buffer = buf; 1378 1379 if (acm_write_buffers_alloc(acm) < 0) 1380 goto alloc_fail2; 1381 1382 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1383 if (!acm->ctrlurb) 1384 goto alloc_fail3; 1385 1386 for (i = 0; i < num_rx_buf; i++) { 1387 struct acm_rb *rb = &(acm->read_buffers[i]); 1388 struct urb *urb; 1389 1390 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1391 &rb->dma); 1392 if (!rb->base) 1393 goto alloc_fail4; 1394 rb->index = i; 1395 rb->instance = acm; 1396 1397 urb = usb_alloc_urb(0, GFP_KERNEL); 1398 if (!urb) 1399 goto alloc_fail4; 1400 1401 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1402 urb->transfer_dma = rb->dma; 1403 if (usb_endpoint_xfer_int(epread)) 1404 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1405 acm->readsize, 1406 acm_read_bulk_callback, rb, 1407 acm->bInterval); 1408 else 1409 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1410 acm->readsize, 1411 acm_read_bulk_callback, rb); 1412 1413 acm->read_urbs[i] = urb; 1414 __set_bit(i, &acm->read_urbs_free); 1415 } 1416 for (i = 0; i < ACM_NW; i++) { 1417 struct acm_wb *snd = &(acm->wb[i]); 1418 1419 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1420 if (snd->urb == NULL) 1421 goto alloc_fail5; 1422 1423 if (usb_endpoint_xfer_int(epwrite)) 1424 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1425 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1426 else 1427 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1428 NULL, acm->writesize, acm_write_bulk, snd); 1429 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1430 if (quirks & SEND_ZERO_PACKET) 1431 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1432 snd->instance = acm; 1433 } 1434 1435 usb_set_intfdata(intf, acm); 1436 1437 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1438 if (i < 0) 1439 goto alloc_fail5; 1440 1441 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1442 struct usb_cdc_country_functional_desc * cfd = 1443 h.usb_cdc_country_functional_desc; 1444 1445 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1446 if (!acm->country_codes) 1447 goto skip_countries; 1448 acm->country_code_size = cfd->bLength - 4; 1449 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1450 cfd->bLength - 4); 1451 acm->country_rel_date = cfd->iCountryCodeRelDate; 1452 1453 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1454 if (i < 0) { 1455 kfree(acm->country_codes); 1456 acm->country_codes = NULL; 1457 acm->country_code_size = 0; 1458 goto skip_countries; 1459 } 1460 1461 i = device_create_file(&intf->dev, 1462 &dev_attr_iCountryCodeRelDate); 1463 if (i < 0) { 1464 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1465 kfree(acm->country_codes); 1466 acm->country_codes = NULL; 1467 acm->country_code_size = 0; 1468 goto skip_countries; 1469 } 1470 } 1471 1472 skip_countries: 1473 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1474 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1475 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1476 /* works around buggy devices */ 1477 epctrl->bInterval ? epctrl->bInterval : 16); 1478 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1479 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1480 acm->notification_buffer = NULL; 1481 acm->nb_index = 0; 1482 acm->nb_size = 0; 1483 1484 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1485 1486 acm->line.dwDTERate = cpu_to_le32(9600); 1487 acm->line.bDataBits = 8; 1488 acm_set_line(acm, &acm->line); 1489 1490 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1491 usb_set_intfdata(data_interface, acm); 1492 1493 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1494 &control_interface->dev); 1495 if (IS_ERR(tty_dev)) { 1496 rv = PTR_ERR(tty_dev); 1497 goto alloc_fail6; 1498 } 1499 1500 if (quirks & CLEAR_HALT_CONDITIONS) { 1501 usb_clear_halt(usb_dev, acm->in); 1502 usb_clear_halt(usb_dev, acm->out); 1503 } 1504 1505 return 0; 1506 alloc_fail6: 1507 if (acm->country_codes) { 1508 device_remove_file(&acm->control->dev, 1509 &dev_attr_wCountryCodes); 1510 device_remove_file(&acm->control->dev, 1511 &dev_attr_iCountryCodeRelDate); 1512 kfree(acm->country_codes); 1513 } 1514 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1515 alloc_fail5: 1516 usb_set_intfdata(intf, NULL); 1517 for (i = 0; i < ACM_NW; i++) 1518 usb_free_urb(acm->wb[i].urb); 1519 alloc_fail4: 1520 for (i = 0; i < num_rx_buf; i++) 1521 usb_free_urb(acm->read_urbs[i]); 1522 acm_read_buffers_free(acm); 1523 usb_free_urb(acm->ctrlurb); 1524 alloc_fail3: 1525 acm_write_buffers_free(acm); 1526 alloc_fail2: 1527 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1528 alloc_fail1: 1529 tty_port_put(&acm->port); 1530 alloc_fail: 1531 return rv; 1532 } 1533 1534 static void acm_disconnect(struct usb_interface *intf) 1535 { 1536 struct acm *acm = usb_get_intfdata(intf); 1537 struct tty_struct *tty; 1538 int i; 1539 1540 /* sibling interface is already cleaning up */ 1541 if (!acm) 1542 return; 1543 1544 mutex_lock(&acm->mutex); 1545 acm->disconnected = true; 1546 if (acm->country_codes) { 1547 device_remove_file(&acm->control->dev, 1548 &dev_attr_wCountryCodes); 1549 device_remove_file(&acm->control->dev, 1550 &dev_attr_iCountryCodeRelDate); 1551 } 1552 wake_up_all(&acm->wioctl); 1553 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1554 usb_set_intfdata(acm->control, NULL); 1555 usb_set_intfdata(acm->data, NULL); 1556 mutex_unlock(&acm->mutex); 1557 1558 tty = tty_port_tty_get(&acm->port); 1559 if (tty) { 1560 tty_vhangup(tty); 1561 tty_kref_put(tty); 1562 } 1563 1564 acm_kill_urbs(acm); 1565 cancel_work_sync(&acm->work); 1566 cancel_delayed_work_sync(&acm->dwork); 1567 1568 tty_unregister_device(acm_tty_driver, acm->minor); 1569 1570 usb_free_urb(acm->ctrlurb); 1571 for (i = 0; i < ACM_NW; i++) 1572 usb_free_urb(acm->wb[i].urb); 1573 for (i = 0; i < acm->rx_buflimit; i++) 1574 usb_free_urb(acm->read_urbs[i]); 1575 acm_write_buffers_free(acm); 1576 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1577 acm_read_buffers_free(acm); 1578 1579 kfree(acm->notification_buffer); 1580 1581 if (!acm->combined_interfaces) 1582 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1583 acm->data : acm->control); 1584 1585 tty_port_put(&acm->port); 1586 } 1587 1588 #ifdef CONFIG_PM 1589 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1590 { 1591 struct acm *acm = usb_get_intfdata(intf); 1592 int cnt; 1593 1594 spin_lock_irq(&acm->write_lock); 1595 if (PMSG_IS_AUTO(message)) { 1596 if (acm->transmitting) { 1597 spin_unlock_irq(&acm->write_lock); 1598 return -EBUSY; 1599 } 1600 } 1601 cnt = acm->susp_count++; 1602 spin_unlock_irq(&acm->write_lock); 1603 1604 if (cnt) 1605 return 0; 1606 1607 acm_kill_urbs(acm); 1608 cancel_work_sync(&acm->work); 1609 cancel_delayed_work_sync(&acm->dwork); 1610 acm->urbs_in_error_delay = 0; 1611 1612 return 0; 1613 } 1614 1615 static int acm_resume(struct usb_interface *intf) 1616 { 1617 struct acm *acm = usb_get_intfdata(intf); 1618 struct urb *urb; 1619 int rv = 0; 1620 1621 spin_lock_irq(&acm->write_lock); 1622 1623 if (--acm->susp_count) 1624 goto out; 1625 1626 if (tty_port_initialized(&acm->port)) { 1627 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1628 1629 for (;;) { 1630 urb = usb_get_from_anchor(&acm->delayed); 1631 if (!urb) 1632 break; 1633 1634 acm_start_wb(acm, urb->context); 1635 } 1636 1637 /* 1638 * delayed error checking because we must 1639 * do the write path at all cost 1640 */ 1641 if (rv < 0) 1642 goto out; 1643 1644 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1645 } 1646 out: 1647 spin_unlock_irq(&acm->write_lock); 1648 1649 return rv; 1650 } 1651 1652 static int acm_reset_resume(struct usb_interface *intf) 1653 { 1654 struct acm *acm = usb_get_intfdata(intf); 1655 1656 if (tty_port_initialized(&acm->port)) 1657 tty_port_tty_hangup(&acm->port, false); 1658 1659 return acm_resume(intf); 1660 } 1661 1662 #endif /* CONFIG_PM */ 1663 1664 static int acm_pre_reset(struct usb_interface *intf) 1665 { 1666 struct acm *acm = usb_get_intfdata(intf); 1667 1668 clear_bit(EVENT_RX_STALL, &acm->flags); 1669 acm->nb_index = 0; /* pending control transfers are lost */ 1670 1671 return 0; 1672 } 1673 1674 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1675 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1676 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1677 USB_CDC_ACM_PROTO_VENDOR) 1678 1679 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1680 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1681 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1682 USB_CDC_ACM_PROTO_VENDOR) 1683 1684 /* 1685 * USB driver structure. 1686 */ 1687 1688 static const struct usb_device_id acm_ids[] = { 1689 /* quirky and broken devices */ 1690 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1691 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1692 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1693 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1694 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1695 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1696 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1698 }, 1699 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1700 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1701 }, 1702 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1703 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1704 }, 1705 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1706 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1707 }, 1708 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1709 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1710 }, 1711 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1712 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1713 }, 1714 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1715 .driver_info = SINGLE_RX_URB, 1716 }, 1717 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1718 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1719 }, 1720 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1721 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1722 }, 1723 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1724 .driver_info = SINGLE_RX_URB, 1725 }, 1726 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1727 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1728 }, 1729 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1730 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1731 }, 1732 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1733 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1734 }, 1735 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1736 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1737 }, 1738 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1739 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1740 }, 1741 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1742 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1743 }, 1744 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1745 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1746 }, 1747 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1748 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1749 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1750 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1751 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1752 }, 1753 /* Motorola H24 HSPA module: */ 1754 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1755 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1756 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1757 }, 1758 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1759 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1760 }, 1761 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1762 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1763 }, 1764 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1765 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1766 }, 1767 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1768 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1769 }, 1770 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1771 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1772 }, 1773 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1774 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1775 }, 1776 1777 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1778 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1779 data interface instead of 1780 communications interface. 1781 Maybe we should define a new 1782 quirk for this. */ 1783 }, 1784 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1785 .driver_info = NO_UNION_NORMAL, 1786 }, 1787 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1788 .driver_info = NO_UNION_NORMAL, 1789 }, 1790 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1791 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1792 }, 1793 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1794 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1795 }, 1796 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1797 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1798 }, 1799 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1800 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1801 }, 1802 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1803 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1804 }, 1805 1806 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1807 .driver_info = CLEAR_HALT_CONDITIONS, 1808 }, 1809 1810 /* Nokia S60 phones expose two ACM channels. The first is 1811 * a modem and is picked up by the standard AT-command 1812 * information below. The second is 'vendor-specific' but 1813 * is treated as a serial device at the S60 end, so we want 1814 * to expose it on Linux too. */ 1815 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1816 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1817 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1818 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1820 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1821 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1822 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1823 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1824 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1825 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1826 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1827 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1828 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1829 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1830 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1872 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1873 1874 /* Support for Owen devices */ 1875 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1876 1877 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1878 1879 /* Support for Droids MuIn LCD */ 1880 { USB_DEVICE(0x04d8, 0x000b), 1881 .driver_info = NO_DATA_INTERFACE, 1882 }, 1883 1884 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1885 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1886 .driver_info = IGNORE_DEVICE, 1887 }, 1888 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1889 .driver_info = IGNORE_DEVICE, 1890 }, 1891 #endif 1892 1893 #if IS_ENABLED(CONFIG_IR_TOY) 1894 { USB_DEVICE(0x04d8, 0xfd08), 1895 .driver_info = IGNORE_DEVICE, 1896 }, 1897 #endif 1898 1899 /*Samsung phone in firmware update mode */ 1900 { USB_DEVICE(0x04e8, 0x685d), 1901 .driver_info = IGNORE_DEVICE, 1902 }, 1903 1904 /* Exclude Infineon Flash Loader utility */ 1905 { USB_DEVICE(0x058b, 0x0041), 1906 .driver_info = IGNORE_DEVICE, 1907 }, 1908 1909 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1910 .driver_info = SEND_ZERO_PACKET, 1911 }, 1912 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1913 .driver_info = SEND_ZERO_PACKET, 1914 }, 1915 1916 /* control interfaces without any protocol set */ 1917 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1918 USB_CDC_PROTO_NONE) }, 1919 1920 /* control interfaces with various AT-command sets */ 1921 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1922 USB_CDC_ACM_PROTO_AT_V25TER) }, 1923 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1924 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1925 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1926 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1927 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1928 USB_CDC_ACM_PROTO_AT_GSM) }, 1929 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1930 USB_CDC_ACM_PROTO_AT_3G) }, 1931 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1932 USB_CDC_ACM_PROTO_AT_CDMA) }, 1933 1934 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1935 .driver_info = SEND_ZERO_PACKET, 1936 }, 1937 1938 { } 1939 }; 1940 1941 MODULE_DEVICE_TABLE(usb, acm_ids); 1942 1943 static struct usb_driver acm_driver = { 1944 .name = "cdc_acm", 1945 .probe = acm_probe, 1946 .disconnect = acm_disconnect, 1947 #ifdef CONFIG_PM 1948 .suspend = acm_suspend, 1949 .resume = acm_resume, 1950 .reset_resume = acm_reset_resume, 1951 #endif 1952 .pre_reset = acm_pre_reset, 1953 .id_table = acm_ids, 1954 #ifdef CONFIG_PM 1955 .supports_autosuspend = 1, 1956 #endif 1957 .disable_hub_initiated_lpm = 1, 1958 }; 1959 1960 /* 1961 * TTY driver structures. 1962 */ 1963 1964 static const struct tty_operations acm_ops = { 1965 .install = acm_tty_install, 1966 .open = acm_tty_open, 1967 .close = acm_tty_close, 1968 .cleanup = acm_tty_cleanup, 1969 .hangup = acm_tty_hangup, 1970 .write = acm_tty_write, 1971 .write_room = acm_tty_write_room, 1972 .ioctl = acm_tty_ioctl, 1973 .throttle = acm_tty_throttle, 1974 .unthrottle = acm_tty_unthrottle, 1975 .chars_in_buffer = acm_tty_chars_in_buffer, 1976 .break_ctl = acm_tty_break_ctl, 1977 .set_termios = acm_tty_set_termios, 1978 .tiocmget = acm_tty_tiocmget, 1979 .tiocmset = acm_tty_tiocmset, 1980 .get_serial = get_serial_info, 1981 .set_serial = set_serial_info, 1982 .get_icount = acm_tty_get_icount, 1983 }; 1984 1985 /* 1986 * Init / exit. 1987 */ 1988 1989 static int __init acm_init(void) 1990 { 1991 int retval; 1992 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1993 if (!acm_tty_driver) 1994 return -ENOMEM; 1995 acm_tty_driver->driver_name = "acm", 1996 acm_tty_driver->name = "ttyACM", 1997 acm_tty_driver->major = ACM_TTY_MAJOR, 1998 acm_tty_driver->minor_start = 0, 1999 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2000 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2001 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2002 acm_tty_driver->init_termios = tty_std_termios; 2003 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2004 HUPCL | CLOCAL; 2005 tty_set_operations(acm_tty_driver, &acm_ops); 2006 2007 retval = tty_register_driver(acm_tty_driver); 2008 if (retval) { 2009 put_tty_driver(acm_tty_driver); 2010 return retval; 2011 } 2012 2013 retval = usb_register(&acm_driver); 2014 if (retval) { 2015 tty_unregister_driver(acm_tty_driver); 2016 put_tty_driver(acm_tty_driver); 2017 return retval; 2018 } 2019 2020 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2021 2022 return 0; 2023 } 2024 2025 static void __exit acm_exit(void) 2026 { 2027 usb_deregister(&acm_driver); 2028 tty_unregister_driver(acm_tty_driver); 2029 put_tty_driver(acm_tty_driver); 2030 idr_destroy(&acm_minors); 2031 } 2032 2033 module_init(acm_init); 2034 module_exit(acm_exit); 2035 2036 MODULE_AUTHOR(DRIVER_AUTHOR); 2037 MODULE_DESCRIPTION(DRIVER_DESC); 2038 MODULE_LICENSE("GPL"); 2039 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2040