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