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