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