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 && retval != -ENODEV) 416 dev_err(&acm->control->dev, 417 "%s - usb_submit_urb failed: %d\n", __func__, retval); 418 else 419 dev_vdbg(&acm->control->dev, 420 "control resubmission terminated %d\n", retval); 421 } 422 423 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 424 { 425 int res; 426 427 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 428 return 0; 429 430 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 431 if (res) { 432 if (res != -EPERM && res != -ENODEV) { 433 dev_err(&acm->data->dev, 434 "urb %d failed submission with %d\n", 435 index, res); 436 } else { 437 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 438 } 439 set_bit(index, &acm->read_urbs_free); 440 return res; 441 } else { 442 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 443 } 444 445 return 0; 446 } 447 448 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 449 { 450 int res; 451 int i; 452 453 for (i = 0; i < acm->rx_buflimit; ++i) { 454 res = acm_submit_read_urb(acm, i, mem_flags); 455 if (res) 456 return res; 457 } 458 459 return 0; 460 } 461 462 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 463 { 464 if (!urb->actual_length) 465 return; 466 467 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 468 urb->actual_length); 469 tty_flip_buffer_push(&acm->port); 470 } 471 472 static void acm_read_bulk_callback(struct urb *urb) 473 { 474 struct acm_rb *rb = urb->context; 475 struct acm *acm = rb->instance; 476 int status = urb->status; 477 bool stopped = false; 478 bool stalled = false; 479 bool cooldown = false; 480 481 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 482 rb->index, urb->actual_length, status); 483 484 if (!acm->dev) { 485 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 486 return; 487 } 488 489 switch (status) { 490 case 0: 491 usb_mark_last_busy(acm->dev); 492 acm_process_read_urb(acm, urb); 493 break; 494 case -EPIPE: 495 set_bit(EVENT_RX_STALL, &acm->flags); 496 stalled = true; 497 break; 498 case -ENOENT: 499 case -ECONNRESET: 500 case -ESHUTDOWN: 501 dev_dbg(&acm->data->dev, 502 "%s - urb shutting down with status: %d\n", 503 __func__, status); 504 stopped = true; 505 break; 506 case -EOVERFLOW: 507 case -EPROTO: 508 dev_dbg(&acm->data->dev, 509 "%s - cooling babbling device\n", __func__); 510 usb_mark_last_busy(acm->dev); 511 set_bit(rb->index, &acm->urbs_in_error_delay); 512 cooldown = true; 513 break; 514 default: 515 dev_dbg(&acm->data->dev, 516 "%s - nonzero urb status received: %d\n", 517 __func__, status); 518 break; 519 } 520 521 /* 522 * Make sure URB processing is done before marking as free to avoid 523 * racing with unthrottle() on another CPU. Matches the barriers 524 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 525 */ 526 smp_mb__before_atomic(); 527 set_bit(rb->index, &acm->read_urbs_free); 528 /* 529 * Make sure URB is marked as free before checking the throttled flag 530 * to avoid racing with unthrottle() on another CPU. Matches the 531 * smp_mb() in unthrottle(). 532 */ 533 smp_mb__after_atomic(); 534 535 if (stopped || stalled || cooldown) { 536 if (stalled) 537 schedule_work(&acm->work); 538 else if (cooldown) 539 schedule_delayed_work(&acm->dwork, HZ / 2); 540 return; 541 } 542 543 if (test_bit(ACM_THROTTLED, &acm->flags)) 544 return; 545 546 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 547 } 548 549 /* data interface wrote those outgoing bytes */ 550 static void acm_write_bulk(struct urb *urb) 551 { 552 struct acm_wb *wb = urb->context; 553 struct acm *acm = wb->instance; 554 unsigned long flags; 555 int status = urb->status; 556 557 if (status || (urb->actual_length != urb->transfer_buffer_length)) 558 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 559 urb->actual_length, 560 urb->transfer_buffer_length, 561 status); 562 563 spin_lock_irqsave(&acm->write_lock, flags); 564 acm_write_done(acm, wb); 565 spin_unlock_irqrestore(&acm->write_lock, flags); 566 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 567 schedule_work(&acm->work); 568 } 569 570 static void acm_softint(struct work_struct *work) 571 { 572 int i; 573 struct acm *acm = container_of(work, struct acm, work); 574 575 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 576 smp_mb(); /* against acm_suspend() */ 577 if (!acm->susp_count) { 578 for (i = 0; i < acm->rx_buflimit; i++) 579 usb_kill_urb(acm->read_urbs[i]); 580 usb_clear_halt(acm->dev, acm->in); 581 acm_submit_read_urbs(acm, GFP_KERNEL); 582 clear_bit(EVENT_RX_STALL, &acm->flags); 583 } 584 } 585 586 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 587 for (i = 0; i < acm->rx_buflimit; i++) 588 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 589 acm_submit_read_urb(acm, i, GFP_NOIO); 590 } 591 592 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 593 tty_port_tty_wakeup(&acm->port); 594 } 595 596 /* 597 * TTY handlers 598 */ 599 600 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 601 { 602 struct acm *acm; 603 int retval; 604 605 acm = acm_get_by_minor(tty->index); 606 if (!acm) 607 return -ENODEV; 608 609 retval = tty_standard_install(driver, tty); 610 if (retval) 611 goto error_init_termios; 612 613 /* 614 * Suppress initial echoing for some devices which might send data 615 * immediately after acm driver has been installed. 616 */ 617 if (acm->quirks & DISABLE_ECHO) 618 tty->termios.c_lflag &= ~ECHO; 619 620 tty->driver_data = acm; 621 622 return 0; 623 624 error_init_termios: 625 tty_port_put(&acm->port); 626 return retval; 627 } 628 629 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 630 { 631 struct acm *acm = tty->driver_data; 632 633 return tty_port_open(&acm->port, tty, filp); 634 } 635 636 static void acm_port_dtr_rts(struct tty_port *port, int raise) 637 { 638 struct acm *acm = container_of(port, struct acm, port); 639 int val; 640 int res; 641 642 if (raise) 643 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 644 else 645 val = 0; 646 647 /* FIXME: add missing ctrlout locking throughout driver */ 648 acm->ctrlout = val; 649 650 res = acm_set_control(acm, val); 651 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 652 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 653 } 654 655 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 656 { 657 struct acm *acm = container_of(port, struct acm, port); 658 int retval = -ENODEV; 659 int i; 660 661 mutex_lock(&acm->mutex); 662 if (acm->disconnected) 663 goto disconnected; 664 665 retval = usb_autopm_get_interface(acm->control); 666 if (retval) 667 goto error_get_interface; 668 669 /* 670 * FIXME: Why do we need this? Allocating 64K of physically contiguous 671 * memory is really nasty... 672 */ 673 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 674 acm->control->needs_remote_wakeup = 1; 675 676 acm->ctrlurb->dev = acm->dev; 677 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 678 if (retval) { 679 dev_err(&acm->control->dev, 680 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 681 goto error_submit_urb; 682 } 683 684 acm_tty_set_termios(tty, NULL); 685 686 /* 687 * Unthrottle device in case the TTY was closed while throttled. 688 */ 689 clear_bit(ACM_THROTTLED, &acm->flags); 690 691 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 692 if (retval) 693 goto error_submit_read_urbs; 694 695 usb_autopm_put_interface(acm->control); 696 697 mutex_unlock(&acm->mutex); 698 699 return 0; 700 701 error_submit_read_urbs: 702 for (i = 0; i < acm->rx_buflimit; i++) 703 usb_kill_urb(acm->read_urbs[i]); 704 usb_kill_urb(acm->ctrlurb); 705 error_submit_urb: 706 usb_autopm_put_interface(acm->control); 707 error_get_interface: 708 disconnected: 709 mutex_unlock(&acm->mutex); 710 711 return usb_translate_errors(retval); 712 } 713 714 static void acm_port_destruct(struct tty_port *port) 715 { 716 struct acm *acm = container_of(port, struct acm, port); 717 718 acm_release_minor(acm); 719 usb_put_intf(acm->control); 720 kfree(acm->country_codes); 721 kfree(acm); 722 } 723 724 static void acm_port_shutdown(struct tty_port *port) 725 { 726 struct acm *acm = container_of(port, struct acm, port); 727 struct urb *urb; 728 struct acm_wb *wb; 729 730 /* 731 * Need to grab write_lock to prevent race with resume, but no need to 732 * hold it due to the tty-port initialised flag. 733 */ 734 spin_lock_irq(&acm->write_lock); 735 spin_unlock_irq(&acm->write_lock); 736 737 usb_autopm_get_interface_no_resume(acm->control); 738 acm->control->needs_remote_wakeup = 0; 739 usb_autopm_put_interface(acm->control); 740 741 for (;;) { 742 urb = usb_get_from_anchor(&acm->delayed); 743 if (!urb) 744 break; 745 wb = urb->context; 746 wb->use = 0; 747 usb_autopm_put_interface_async(acm->control); 748 } 749 750 acm_kill_urbs(acm); 751 } 752 753 static void acm_tty_cleanup(struct tty_struct *tty) 754 { 755 struct acm *acm = tty->driver_data; 756 757 tty_port_put(&acm->port); 758 } 759 760 static void acm_tty_hangup(struct tty_struct *tty) 761 { 762 struct acm *acm = tty->driver_data; 763 764 tty_port_hangup(&acm->port); 765 } 766 767 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 768 { 769 struct acm *acm = tty->driver_data; 770 771 tty_port_close(&acm->port, tty, filp); 772 } 773 774 static int acm_tty_write(struct tty_struct *tty, 775 const unsigned char *buf, int count) 776 { 777 struct acm *acm = tty->driver_data; 778 int stat; 779 unsigned long flags; 780 int wbn; 781 struct acm_wb *wb; 782 783 if (!count) 784 return 0; 785 786 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 787 788 spin_lock_irqsave(&acm->write_lock, flags); 789 wbn = acm_wb_alloc(acm); 790 if (wbn < 0) { 791 spin_unlock_irqrestore(&acm->write_lock, flags); 792 return 0; 793 } 794 wb = &acm->wb[wbn]; 795 796 if (!acm->dev) { 797 wb->use = 0; 798 spin_unlock_irqrestore(&acm->write_lock, flags); 799 return -ENODEV; 800 } 801 802 count = (count > acm->writesize) ? acm->writesize : count; 803 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 804 memcpy(wb->buf, buf, count); 805 wb->len = count; 806 807 stat = usb_autopm_get_interface_async(acm->control); 808 if (stat) { 809 wb->use = 0; 810 spin_unlock_irqrestore(&acm->write_lock, flags); 811 return stat; 812 } 813 814 if (acm->susp_count) { 815 usb_anchor_urb(wb->urb, &acm->delayed); 816 spin_unlock_irqrestore(&acm->write_lock, flags); 817 return count; 818 } 819 820 stat = acm_start_wb(acm, wb); 821 spin_unlock_irqrestore(&acm->write_lock, flags); 822 823 if (stat < 0) 824 return stat; 825 return count; 826 } 827 828 static int acm_tty_write_room(struct tty_struct *tty) 829 { 830 struct acm *acm = tty->driver_data; 831 /* 832 * Do not let the line discipline to know that we have a reserve, 833 * or it might get too enthusiastic. 834 */ 835 return acm_wb_is_avail(acm) ? acm->writesize : 0; 836 } 837 838 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 839 { 840 struct acm *acm = tty->driver_data; 841 /* 842 * if the device was unplugged then any remaining characters fell out 843 * of the connector ;) 844 */ 845 if (acm->disconnected) 846 return 0; 847 /* 848 * This is inaccurate (overcounts), but it works. 849 */ 850 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 851 } 852 853 static void acm_tty_throttle(struct tty_struct *tty) 854 { 855 struct acm *acm = tty->driver_data; 856 857 set_bit(ACM_THROTTLED, &acm->flags); 858 } 859 860 static void acm_tty_unthrottle(struct tty_struct *tty) 861 { 862 struct acm *acm = tty->driver_data; 863 864 clear_bit(ACM_THROTTLED, &acm->flags); 865 866 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 867 smp_mb(); 868 869 acm_submit_read_urbs(acm, GFP_KERNEL); 870 } 871 872 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 873 { 874 struct acm *acm = tty->driver_data; 875 int retval; 876 877 retval = acm_send_break(acm, state ? 0xffff : 0); 878 if (retval < 0) 879 dev_dbg(&acm->control->dev, 880 "%s - send break failed\n", __func__); 881 return retval; 882 } 883 884 static int acm_tty_tiocmget(struct tty_struct *tty) 885 { 886 struct acm *acm = tty->driver_data; 887 888 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 889 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 890 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 891 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 892 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 893 TIOCM_CTS; 894 } 895 896 static int acm_tty_tiocmset(struct tty_struct *tty, 897 unsigned int set, unsigned int clear) 898 { 899 struct acm *acm = tty->driver_data; 900 unsigned int newctrl; 901 902 newctrl = acm->ctrlout; 903 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 904 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 905 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 906 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 907 908 newctrl = (newctrl & ~clear) | set; 909 910 if (acm->ctrlout == newctrl) 911 return 0; 912 return acm_set_control(acm, acm->ctrlout = newctrl); 913 } 914 915 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 916 { 917 struct acm *acm = tty->driver_data; 918 919 ss->xmit_fifo_size = acm->writesize; 920 ss->baud_base = le32_to_cpu(acm->line.dwDTERate); 921 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 922 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 923 ASYNC_CLOSING_WAIT_NONE : 924 jiffies_to_msecs(acm->port.closing_wait) / 10; 925 return 0; 926 } 927 928 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 929 { 930 struct acm *acm = tty->driver_data; 931 unsigned int closing_wait, close_delay; 932 unsigned int old_closing_wait, old_close_delay; 933 int retval = 0; 934 935 close_delay = msecs_to_jiffies(ss->close_delay * 10); 936 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 937 ASYNC_CLOSING_WAIT_NONE : 938 msecs_to_jiffies(ss->closing_wait * 10); 939 940 /* we must redo the rounding here, so that the values match */ 941 old_close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 942 old_closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 943 ASYNC_CLOSING_WAIT_NONE : 944 jiffies_to_msecs(acm->port.closing_wait) / 10; 945 946 mutex_lock(&acm->port.mutex); 947 948 if (!capable(CAP_SYS_ADMIN)) { 949 if ((ss->close_delay != old_close_delay) || 950 (ss->closing_wait != old_closing_wait)) 951 retval = -EPERM; 952 else 953 retval = -EOPNOTSUPP; 954 } else { 955 acm->port.close_delay = close_delay; 956 acm->port.closing_wait = closing_wait; 957 } 958 959 mutex_unlock(&acm->port.mutex); 960 return retval; 961 } 962 963 static int wait_serial_change(struct acm *acm, unsigned long arg) 964 { 965 int rv = 0; 966 DECLARE_WAITQUEUE(wait, current); 967 struct async_icount old, new; 968 969 do { 970 spin_lock_irq(&acm->read_lock); 971 old = acm->oldcount; 972 new = acm->iocount; 973 acm->oldcount = new; 974 spin_unlock_irq(&acm->read_lock); 975 976 if ((arg & TIOCM_DSR) && 977 old.dsr != new.dsr) 978 break; 979 if ((arg & TIOCM_CD) && 980 old.dcd != new.dcd) 981 break; 982 if ((arg & TIOCM_RI) && 983 old.rng != new.rng) 984 break; 985 986 add_wait_queue(&acm->wioctl, &wait); 987 set_current_state(TASK_INTERRUPTIBLE); 988 schedule(); 989 remove_wait_queue(&acm->wioctl, &wait); 990 if (acm->disconnected) { 991 if (arg & TIOCM_CD) 992 break; 993 else 994 rv = -ENODEV; 995 } else { 996 if (signal_pending(current)) 997 rv = -ERESTARTSYS; 998 } 999 } while (!rv); 1000 1001 1002 1003 return rv; 1004 } 1005 1006 static int acm_tty_get_icount(struct tty_struct *tty, 1007 struct serial_icounter_struct *icount) 1008 { 1009 struct acm *acm = tty->driver_data; 1010 1011 icount->dsr = acm->iocount.dsr; 1012 icount->rng = acm->iocount.rng; 1013 icount->dcd = acm->iocount.dcd; 1014 icount->frame = acm->iocount.frame; 1015 icount->overrun = acm->iocount.overrun; 1016 icount->parity = acm->iocount.parity; 1017 icount->brk = acm->iocount.brk; 1018 1019 return 0; 1020 } 1021 1022 static int acm_tty_ioctl(struct tty_struct *tty, 1023 unsigned int cmd, unsigned long arg) 1024 { 1025 struct acm *acm = tty->driver_data; 1026 int rv = -ENOIOCTLCMD; 1027 1028 switch (cmd) { 1029 case TIOCMIWAIT: 1030 rv = usb_autopm_get_interface(acm->control); 1031 if (rv < 0) { 1032 rv = -EIO; 1033 break; 1034 } 1035 rv = wait_serial_change(acm, arg); 1036 usb_autopm_put_interface(acm->control); 1037 break; 1038 } 1039 1040 return rv; 1041 } 1042 1043 static void acm_tty_set_termios(struct tty_struct *tty, 1044 struct ktermios *termios_old) 1045 { 1046 struct acm *acm = tty->driver_data; 1047 struct ktermios *termios = &tty->termios; 1048 struct usb_cdc_line_coding newline; 1049 int newctrl = acm->ctrlout; 1050 1051 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1052 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1053 newline.bParityType = termios->c_cflag & PARENB ? 1054 (termios->c_cflag & PARODD ? 1 : 2) + 1055 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1056 switch (termios->c_cflag & CSIZE) { 1057 case CS5: 1058 newline.bDataBits = 5; 1059 break; 1060 case CS6: 1061 newline.bDataBits = 6; 1062 break; 1063 case CS7: 1064 newline.bDataBits = 7; 1065 break; 1066 case CS8: 1067 default: 1068 newline.bDataBits = 8; 1069 break; 1070 } 1071 /* FIXME: Needs to clear unsupported bits in the termios */ 1072 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1073 1074 if (C_BAUD(tty) == B0) { 1075 newline.dwDTERate = acm->line.dwDTERate; 1076 newctrl &= ~ACM_CTRL_DTR; 1077 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1078 newctrl |= ACM_CTRL_DTR; 1079 } 1080 1081 if (newctrl != acm->ctrlout) 1082 acm_set_control(acm, acm->ctrlout = newctrl); 1083 1084 if (memcmp(&acm->line, &newline, sizeof newline)) { 1085 memcpy(&acm->line, &newline, sizeof newline); 1086 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1087 __func__, 1088 le32_to_cpu(newline.dwDTERate), 1089 newline.bCharFormat, newline.bParityType, 1090 newline.bDataBits); 1091 acm_set_line(acm, &acm->line); 1092 } 1093 } 1094 1095 static const struct tty_port_operations acm_port_ops = { 1096 .dtr_rts = acm_port_dtr_rts, 1097 .shutdown = acm_port_shutdown, 1098 .activate = acm_port_activate, 1099 .destruct = acm_port_destruct, 1100 }; 1101 1102 /* 1103 * USB probe and disconnect routines. 1104 */ 1105 1106 /* Little helpers: write/read buffers free */ 1107 static void acm_write_buffers_free(struct acm *acm) 1108 { 1109 int i; 1110 struct acm_wb *wb; 1111 1112 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1113 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1114 } 1115 1116 static void acm_read_buffers_free(struct acm *acm) 1117 { 1118 int i; 1119 1120 for (i = 0; i < acm->rx_buflimit; i++) 1121 usb_free_coherent(acm->dev, acm->readsize, 1122 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1123 } 1124 1125 /* Little helper: write buffers allocate */ 1126 static int acm_write_buffers_alloc(struct acm *acm) 1127 { 1128 int i; 1129 struct acm_wb *wb; 1130 1131 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1132 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1133 &wb->dmah); 1134 if (!wb->buf) { 1135 while (i != 0) { 1136 --i; 1137 --wb; 1138 usb_free_coherent(acm->dev, acm->writesize, 1139 wb->buf, wb->dmah); 1140 } 1141 return -ENOMEM; 1142 } 1143 } 1144 return 0; 1145 } 1146 1147 static int acm_probe(struct usb_interface *intf, 1148 const struct usb_device_id *id) 1149 { 1150 struct usb_cdc_union_desc *union_header = NULL; 1151 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1152 unsigned char *buffer = intf->altsetting->extra; 1153 int buflen = intf->altsetting->extralen; 1154 struct usb_interface *control_interface; 1155 struct usb_interface *data_interface; 1156 struct usb_endpoint_descriptor *epctrl = NULL; 1157 struct usb_endpoint_descriptor *epread = NULL; 1158 struct usb_endpoint_descriptor *epwrite = NULL; 1159 struct usb_device *usb_dev = interface_to_usbdev(intf); 1160 struct usb_cdc_parsed_header h; 1161 struct acm *acm; 1162 int minor; 1163 int ctrlsize, readsize; 1164 u8 *buf; 1165 int call_intf_num = -1; 1166 int data_intf_num = -1; 1167 unsigned long quirks; 1168 int num_rx_buf; 1169 int i; 1170 int combined_interfaces = 0; 1171 struct device *tty_dev; 1172 int rv = -ENOMEM; 1173 int res; 1174 1175 /* normal quirks */ 1176 quirks = (unsigned long)id->driver_info; 1177 1178 if (quirks == IGNORE_DEVICE) 1179 return -ENODEV; 1180 1181 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1182 1183 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1184 1185 /* handle quirks deadly to normal probing*/ 1186 if (quirks == NO_UNION_NORMAL) { 1187 data_interface = usb_ifnum_to_if(usb_dev, 1); 1188 control_interface = usb_ifnum_to_if(usb_dev, 0); 1189 /* we would crash */ 1190 if (!data_interface || !control_interface) 1191 return -ENODEV; 1192 goto skip_normal_probe; 1193 } 1194 1195 /* normal probing*/ 1196 if (!buffer) { 1197 dev_err(&intf->dev, "Weird descriptor references\n"); 1198 return -EINVAL; 1199 } 1200 1201 if (!intf->cur_altsetting) 1202 return -EINVAL; 1203 1204 if (!buflen) { 1205 if (intf->cur_altsetting->endpoint && 1206 intf->cur_altsetting->endpoint->extralen && 1207 intf->cur_altsetting->endpoint->extra) { 1208 dev_dbg(&intf->dev, 1209 "Seeking extra descriptors on endpoint\n"); 1210 buflen = intf->cur_altsetting->endpoint->extralen; 1211 buffer = intf->cur_altsetting->endpoint->extra; 1212 } else { 1213 dev_err(&intf->dev, 1214 "Zero length descriptor references\n"); 1215 return -EINVAL; 1216 } 1217 } 1218 1219 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1220 union_header = h.usb_cdc_union_desc; 1221 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1222 if (cmgmd) 1223 call_intf_num = cmgmd->bDataInterface; 1224 1225 if (!union_header) { 1226 if (call_intf_num > 0) { 1227 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1228 /* quirks for Droids MuIn LCD */ 1229 if (quirks & NO_DATA_INTERFACE) { 1230 data_interface = usb_ifnum_to_if(usb_dev, 0); 1231 } else { 1232 data_intf_num = call_intf_num; 1233 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1234 } 1235 control_interface = intf; 1236 } else { 1237 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1238 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1239 return -ENODEV; 1240 } else { 1241 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1242 combined_interfaces = 1; 1243 control_interface = data_interface = intf; 1244 goto look_for_collapsed_interface; 1245 } 1246 } 1247 } else { 1248 data_intf_num = union_header->bSlaveInterface0; 1249 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1250 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1251 } 1252 1253 if (!control_interface || !data_interface) { 1254 dev_dbg(&intf->dev, "no interfaces\n"); 1255 return -ENODEV; 1256 } 1257 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1258 return -ENODEV; 1259 1260 if (data_intf_num != call_intf_num) 1261 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1262 1263 if (control_interface == data_interface) { 1264 /* some broken devices designed for windows work this way */ 1265 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1266 combined_interfaces = 1; 1267 /* a popular other OS doesn't use it */ 1268 quirks |= NO_CAP_LINE; 1269 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1270 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1271 return -EINVAL; 1272 } 1273 look_for_collapsed_interface: 1274 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1275 &epread, &epwrite, &epctrl, NULL); 1276 if (res) 1277 return res; 1278 1279 goto made_compressed_probe; 1280 } 1281 1282 skip_normal_probe: 1283 1284 /*workaround for switched interfaces */ 1285 if (data_interface->cur_altsetting->desc.bInterfaceClass 1286 != CDC_DATA_INTERFACE_TYPE) { 1287 if (control_interface->cur_altsetting->desc.bInterfaceClass 1288 == CDC_DATA_INTERFACE_TYPE) { 1289 dev_dbg(&intf->dev, 1290 "Your device has switched interfaces.\n"); 1291 swap(control_interface, data_interface); 1292 } else { 1293 return -EINVAL; 1294 } 1295 } 1296 1297 /* Accept probe requests only for the control interface */ 1298 if (!combined_interfaces && intf != control_interface) 1299 return -ENODEV; 1300 1301 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1302 /* valid in this context */ 1303 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1304 return -EBUSY; 1305 } 1306 1307 1308 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1309 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1310 return -EINVAL; 1311 1312 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1313 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1314 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1315 1316 1317 /* workaround for switched endpoints */ 1318 if (!usb_endpoint_dir_in(epread)) { 1319 /* descriptors are swapped */ 1320 dev_dbg(&intf->dev, 1321 "The data interface has switched endpoints\n"); 1322 swap(epread, epwrite); 1323 } 1324 made_compressed_probe: 1325 dev_dbg(&intf->dev, "interfaces are valid\n"); 1326 1327 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1328 if (acm == NULL) 1329 goto alloc_fail; 1330 1331 tty_port_init(&acm->port); 1332 acm->port.ops = &acm_port_ops; 1333 1334 ctrlsize = usb_endpoint_maxp(epctrl); 1335 readsize = usb_endpoint_maxp(epread) * 1336 (quirks == SINGLE_RX_URB ? 1 : 2); 1337 acm->combined_interfaces = combined_interfaces; 1338 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1339 acm->control = control_interface; 1340 acm->data = data_interface; 1341 1342 usb_get_intf(acm->control); /* undone in destruct() */ 1343 1344 minor = acm_alloc_minor(acm); 1345 if (minor < 0) 1346 goto alloc_fail1; 1347 1348 acm->minor = minor; 1349 acm->dev = usb_dev; 1350 if (h.usb_cdc_acm_descriptor) 1351 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1352 if (quirks & NO_CAP_LINE) 1353 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1354 acm->ctrlsize = ctrlsize; 1355 acm->readsize = readsize; 1356 acm->rx_buflimit = num_rx_buf; 1357 INIT_WORK(&acm->work, acm_softint); 1358 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1359 init_waitqueue_head(&acm->wioctl); 1360 spin_lock_init(&acm->write_lock); 1361 spin_lock_init(&acm->read_lock); 1362 mutex_init(&acm->mutex); 1363 if (usb_endpoint_xfer_int(epread)) { 1364 acm->bInterval = epread->bInterval; 1365 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1366 } else { 1367 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1368 } 1369 if (usb_endpoint_xfer_int(epwrite)) 1370 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1371 else 1372 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1373 init_usb_anchor(&acm->delayed); 1374 acm->quirks = quirks; 1375 1376 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1377 if (!buf) 1378 goto alloc_fail1; 1379 acm->ctrl_buffer = buf; 1380 1381 if (acm_write_buffers_alloc(acm) < 0) 1382 goto alloc_fail2; 1383 1384 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1385 if (!acm->ctrlurb) 1386 goto alloc_fail3; 1387 1388 for (i = 0; i < num_rx_buf; i++) { 1389 struct acm_rb *rb = &(acm->read_buffers[i]); 1390 struct urb *urb; 1391 1392 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1393 &rb->dma); 1394 if (!rb->base) 1395 goto alloc_fail4; 1396 rb->index = i; 1397 rb->instance = acm; 1398 1399 urb = usb_alloc_urb(0, GFP_KERNEL); 1400 if (!urb) 1401 goto alloc_fail4; 1402 1403 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1404 urb->transfer_dma = rb->dma; 1405 if (usb_endpoint_xfer_int(epread)) 1406 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1407 acm->readsize, 1408 acm_read_bulk_callback, rb, 1409 acm->bInterval); 1410 else 1411 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1412 acm->readsize, 1413 acm_read_bulk_callback, rb); 1414 1415 acm->read_urbs[i] = urb; 1416 __set_bit(i, &acm->read_urbs_free); 1417 } 1418 for (i = 0; i < ACM_NW; i++) { 1419 struct acm_wb *snd = &(acm->wb[i]); 1420 1421 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1422 if (snd->urb == NULL) 1423 goto alloc_fail5; 1424 1425 if (usb_endpoint_xfer_int(epwrite)) 1426 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1427 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1428 else 1429 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1430 NULL, acm->writesize, acm_write_bulk, snd); 1431 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1432 if (quirks & SEND_ZERO_PACKET) 1433 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1434 snd->instance = acm; 1435 } 1436 1437 usb_set_intfdata(intf, acm); 1438 1439 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1440 if (i < 0) 1441 goto alloc_fail5; 1442 1443 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1444 struct usb_cdc_country_functional_desc * cfd = 1445 h.usb_cdc_country_functional_desc; 1446 1447 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1448 if (!acm->country_codes) 1449 goto skip_countries; 1450 acm->country_code_size = cfd->bLength - 4; 1451 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1452 cfd->bLength - 4); 1453 acm->country_rel_date = cfd->iCountryCodeRelDate; 1454 1455 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1456 if (i < 0) { 1457 kfree(acm->country_codes); 1458 acm->country_codes = NULL; 1459 acm->country_code_size = 0; 1460 goto skip_countries; 1461 } 1462 1463 i = device_create_file(&intf->dev, 1464 &dev_attr_iCountryCodeRelDate); 1465 if (i < 0) { 1466 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1467 kfree(acm->country_codes); 1468 acm->country_codes = NULL; 1469 acm->country_code_size = 0; 1470 goto skip_countries; 1471 } 1472 } 1473 1474 skip_countries: 1475 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1476 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1477 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1478 /* works around buggy devices */ 1479 epctrl->bInterval ? epctrl->bInterval : 16); 1480 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1481 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1482 acm->notification_buffer = NULL; 1483 acm->nb_index = 0; 1484 acm->nb_size = 0; 1485 1486 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1487 1488 acm->line.dwDTERate = cpu_to_le32(9600); 1489 acm->line.bDataBits = 8; 1490 acm_set_line(acm, &acm->line); 1491 1492 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1493 usb_set_intfdata(data_interface, acm); 1494 1495 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1496 &control_interface->dev); 1497 if (IS_ERR(tty_dev)) { 1498 rv = PTR_ERR(tty_dev); 1499 goto alloc_fail6; 1500 } 1501 1502 if (quirks & CLEAR_HALT_CONDITIONS) { 1503 usb_clear_halt(usb_dev, acm->in); 1504 usb_clear_halt(usb_dev, acm->out); 1505 } 1506 1507 return 0; 1508 alloc_fail6: 1509 if (acm->country_codes) { 1510 device_remove_file(&acm->control->dev, 1511 &dev_attr_wCountryCodes); 1512 device_remove_file(&acm->control->dev, 1513 &dev_attr_iCountryCodeRelDate); 1514 kfree(acm->country_codes); 1515 } 1516 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1517 alloc_fail5: 1518 usb_set_intfdata(intf, NULL); 1519 for (i = 0; i < ACM_NW; i++) 1520 usb_free_urb(acm->wb[i].urb); 1521 alloc_fail4: 1522 for (i = 0; i < num_rx_buf; i++) 1523 usb_free_urb(acm->read_urbs[i]); 1524 acm_read_buffers_free(acm); 1525 usb_free_urb(acm->ctrlurb); 1526 alloc_fail3: 1527 acm_write_buffers_free(acm); 1528 alloc_fail2: 1529 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1530 alloc_fail1: 1531 tty_port_put(&acm->port); 1532 alloc_fail: 1533 return rv; 1534 } 1535 1536 static void acm_disconnect(struct usb_interface *intf) 1537 { 1538 struct acm *acm = usb_get_intfdata(intf); 1539 struct tty_struct *tty; 1540 int i; 1541 1542 /* sibling interface is already cleaning up */ 1543 if (!acm) 1544 return; 1545 1546 mutex_lock(&acm->mutex); 1547 acm->disconnected = true; 1548 if (acm->country_codes) { 1549 device_remove_file(&acm->control->dev, 1550 &dev_attr_wCountryCodes); 1551 device_remove_file(&acm->control->dev, 1552 &dev_attr_iCountryCodeRelDate); 1553 } 1554 wake_up_all(&acm->wioctl); 1555 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1556 usb_set_intfdata(acm->control, NULL); 1557 usb_set_intfdata(acm->data, NULL); 1558 mutex_unlock(&acm->mutex); 1559 1560 tty = tty_port_tty_get(&acm->port); 1561 if (tty) { 1562 tty_vhangup(tty); 1563 tty_kref_put(tty); 1564 } 1565 1566 acm_kill_urbs(acm); 1567 cancel_work_sync(&acm->work); 1568 cancel_delayed_work_sync(&acm->dwork); 1569 1570 tty_unregister_device(acm_tty_driver, acm->minor); 1571 1572 usb_free_urb(acm->ctrlurb); 1573 for (i = 0; i < ACM_NW; i++) 1574 usb_free_urb(acm->wb[i].urb); 1575 for (i = 0; i < acm->rx_buflimit; i++) 1576 usb_free_urb(acm->read_urbs[i]); 1577 acm_write_buffers_free(acm); 1578 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1579 acm_read_buffers_free(acm); 1580 1581 kfree(acm->notification_buffer); 1582 1583 if (!acm->combined_interfaces) 1584 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1585 acm->data : acm->control); 1586 1587 tty_port_put(&acm->port); 1588 } 1589 1590 #ifdef CONFIG_PM 1591 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1592 { 1593 struct acm *acm = usb_get_intfdata(intf); 1594 int cnt; 1595 1596 spin_lock_irq(&acm->write_lock); 1597 if (PMSG_IS_AUTO(message)) { 1598 if (acm->transmitting) { 1599 spin_unlock_irq(&acm->write_lock); 1600 return -EBUSY; 1601 } 1602 } 1603 cnt = acm->susp_count++; 1604 spin_unlock_irq(&acm->write_lock); 1605 1606 if (cnt) 1607 return 0; 1608 1609 acm_kill_urbs(acm); 1610 cancel_work_sync(&acm->work); 1611 cancel_delayed_work_sync(&acm->dwork); 1612 acm->urbs_in_error_delay = 0; 1613 1614 return 0; 1615 } 1616 1617 static int acm_resume(struct usb_interface *intf) 1618 { 1619 struct acm *acm = usb_get_intfdata(intf); 1620 struct urb *urb; 1621 int rv = 0; 1622 1623 spin_lock_irq(&acm->write_lock); 1624 1625 if (--acm->susp_count) 1626 goto out; 1627 1628 if (tty_port_initialized(&acm->port)) { 1629 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1630 1631 for (;;) { 1632 urb = usb_get_from_anchor(&acm->delayed); 1633 if (!urb) 1634 break; 1635 1636 acm_start_wb(acm, urb->context); 1637 } 1638 1639 /* 1640 * delayed error checking because we must 1641 * do the write path at all cost 1642 */ 1643 if (rv < 0) 1644 goto out; 1645 1646 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1647 } 1648 out: 1649 spin_unlock_irq(&acm->write_lock); 1650 1651 return rv; 1652 } 1653 1654 static int acm_reset_resume(struct usb_interface *intf) 1655 { 1656 struct acm *acm = usb_get_intfdata(intf); 1657 1658 if (tty_port_initialized(&acm->port)) 1659 tty_port_tty_hangup(&acm->port, false); 1660 1661 return acm_resume(intf); 1662 } 1663 1664 #endif /* CONFIG_PM */ 1665 1666 static int acm_pre_reset(struct usb_interface *intf) 1667 { 1668 struct acm *acm = usb_get_intfdata(intf); 1669 1670 clear_bit(EVENT_RX_STALL, &acm->flags); 1671 acm->nb_index = 0; /* pending control transfers are lost */ 1672 1673 return 0; 1674 } 1675 1676 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1677 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1678 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1679 USB_CDC_ACM_PROTO_VENDOR) 1680 1681 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1682 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1683 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1684 USB_CDC_ACM_PROTO_VENDOR) 1685 1686 /* 1687 * USB driver structure. 1688 */ 1689 1690 static const struct usb_device_id acm_ids[] = { 1691 /* quirky and broken devices */ 1692 { USB_DEVICE(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 /*Samsung phone in firmware update mode */ 1894 { USB_DEVICE(0x04e8, 0x685d), 1895 .driver_info = IGNORE_DEVICE, 1896 }, 1897 1898 /* Exclude Infineon Flash Loader utility */ 1899 { USB_DEVICE(0x058b, 0x0041), 1900 .driver_info = IGNORE_DEVICE, 1901 }, 1902 1903 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1904 .driver_info = SEND_ZERO_PACKET, 1905 }, 1906 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1907 .driver_info = SEND_ZERO_PACKET, 1908 }, 1909 1910 /* control interfaces without any protocol set */ 1911 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1912 USB_CDC_PROTO_NONE) }, 1913 1914 /* control interfaces with various AT-command sets */ 1915 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1916 USB_CDC_ACM_PROTO_AT_V25TER) }, 1917 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1918 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1919 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1920 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1921 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1922 USB_CDC_ACM_PROTO_AT_GSM) }, 1923 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1924 USB_CDC_ACM_PROTO_AT_3G) }, 1925 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1926 USB_CDC_ACM_PROTO_AT_CDMA) }, 1927 1928 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1929 .driver_info = SEND_ZERO_PACKET, 1930 }, 1931 1932 { } 1933 }; 1934 1935 MODULE_DEVICE_TABLE(usb, acm_ids); 1936 1937 static struct usb_driver acm_driver = { 1938 .name = "cdc_acm", 1939 .probe = acm_probe, 1940 .disconnect = acm_disconnect, 1941 #ifdef CONFIG_PM 1942 .suspend = acm_suspend, 1943 .resume = acm_resume, 1944 .reset_resume = acm_reset_resume, 1945 #endif 1946 .pre_reset = acm_pre_reset, 1947 .id_table = acm_ids, 1948 #ifdef CONFIG_PM 1949 .supports_autosuspend = 1, 1950 #endif 1951 .disable_hub_initiated_lpm = 1, 1952 }; 1953 1954 /* 1955 * TTY driver structures. 1956 */ 1957 1958 static const struct tty_operations acm_ops = { 1959 .install = acm_tty_install, 1960 .open = acm_tty_open, 1961 .close = acm_tty_close, 1962 .cleanup = acm_tty_cleanup, 1963 .hangup = acm_tty_hangup, 1964 .write = acm_tty_write, 1965 .write_room = acm_tty_write_room, 1966 .ioctl = acm_tty_ioctl, 1967 .throttle = acm_tty_throttle, 1968 .unthrottle = acm_tty_unthrottle, 1969 .chars_in_buffer = acm_tty_chars_in_buffer, 1970 .break_ctl = acm_tty_break_ctl, 1971 .set_termios = acm_tty_set_termios, 1972 .tiocmget = acm_tty_tiocmget, 1973 .tiocmset = acm_tty_tiocmset, 1974 .get_serial = get_serial_info, 1975 .set_serial = set_serial_info, 1976 .get_icount = acm_tty_get_icount, 1977 }; 1978 1979 /* 1980 * Init / exit. 1981 */ 1982 1983 static int __init acm_init(void) 1984 { 1985 int retval; 1986 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1987 if (!acm_tty_driver) 1988 return -ENOMEM; 1989 acm_tty_driver->driver_name = "acm", 1990 acm_tty_driver->name = "ttyACM", 1991 acm_tty_driver->major = ACM_TTY_MAJOR, 1992 acm_tty_driver->minor_start = 0, 1993 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1994 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1995 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1996 acm_tty_driver->init_termios = tty_std_termios; 1997 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1998 HUPCL | CLOCAL; 1999 tty_set_operations(acm_tty_driver, &acm_ops); 2000 2001 retval = tty_register_driver(acm_tty_driver); 2002 if (retval) { 2003 put_tty_driver(acm_tty_driver); 2004 return retval; 2005 } 2006 2007 retval = usb_register(&acm_driver); 2008 if (retval) { 2009 tty_unregister_driver(acm_tty_driver); 2010 put_tty_driver(acm_tty_driver); 2011 return retval; 2012 } 2013 2014 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2015 2016 return 0; 2017 } 2018 2019 static void __exit acm_exit(void) 2020 { 2021 usb_deregister(&acm_driver); 2022 tty_unregister_driver(acm_tty_driver); 2023 put_tty_driver(acm_tty_driver); 2024 idr_destroy(&acm_minors); 2025 } 2026 2027 module_init(acm_init); 2028 module_exit(acm_exit); 2029 2030 MODULE_AUTHOR(DRIVER_AUTHOR); 2031 MODULE_DESCRIPTION(DRIVER_DESC); 2032 MODULE_LICENSE("GPL"); 2033 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2034