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