1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * cdc-acm.c 4 * 5 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 6 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 7 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 8 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 9 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 10 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 11 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 12 * 13 * USB Abstract Control Model driver for USB modems and ISDN adapters 14 * 15 * Sponsored by SuSE 16 */ 17 18 #undef DEBUG 19 #undef VERBOSE_DEBUG 20 21 #include <linux/kernel.h> 22 #include <linux/sched/signal.h> 23 #include <linux/errno.h> 24 #include <linux/init.h> 25 #include <linux/slab.h> 26 #include <linux/log2.h> 27 #include <linux/tty.h> 28 #include <linux/serial.h> 29 #include <linux/tty_driver.h> 30 #include <linux/tty_flip.h> 31 #include <linux/module.h> 32 #include <linux/mutex.h> 33 #include <linux/uaccess.h> 34 #include <linux/usb.h> 35 #include <linux/usb/cdc.h> 36 #include <asm/byteorder.h> 37 #include <asm/unaligned.h> 38 #include <linux/idr.h> 39 #include <linux/list.h> 40 41 #include "cdc-acm.h" 42 43 44 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 45 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 46 47 static struct usb_driver acm_driver; 48 static struct tty_driver *acm_tty_driver; 49 50 static DEFINE_IDR(acm_minors); 51 static DEFINE_MUTEX(acm_minors_lock); 52 53 static void acm_tty_set_termios(struct tty_struct *tty, 54 struct ktermios *termios_old); 55 56 /* 57 * acm_minors accessors 58 */ 59 60 /* 61 * Look up an ACM structure by minor. If found and not disconnected, increment 62 * its refcount and return it with its mutex held. 63 */ 64 static struct acm *acm_get_by_minor(unsigned int minor) 65 { 66 struct acm *acm; 67 68 mutex_lock(&acm_minors_lock); 69 acm = idr_find(&acm_minors, minor); 70 if (acm) { 71 mutex_lock(&acm->mutex); 72 if (acm->disconnected) { 73 mutex_unlock(&acm->mutex); 74 acm = NULL; 75 } else { 76 tty_port_get(&acm->port); 77 mutex_unlock(&acm->mutex); 78 } 79 } 80 mutex_unlock(&acm_minors_lock); 81 return acm; 82 } 83 84 /* 85 * Try to find an available minor number and if found, associate it with 'acm'. 86 */ 87 static int acm_alloc_minor(struct acm *acm) 88 { 89 int minor; 90 91 mutex_lock(&acm_minors_lock); 92 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 93 mutex_unlock(&acm_minors_lock); 94 95 return minor; 96 } 97 98 /* Release the minor number associated with 'acm'. */ 99 static void acm_release_minor(struct acm *acm) 100 { 101 mutex_lock(&acm_minors_lock); 102 idr_remove(&acm_minors, acm->minor); 103 mutex_unlock(&acm_minors_lock); 104 } 105 106 /* 107 * Functions for ACM control messages. 108 */ 109 110 static int acm_ctrl_msg(struct acm *acm, int request, int value, 111 void *buf, int len) 112 { 113 int retval; 114 115 retval = usb_autopm_get_interface(acm->control); 116 if (retval) 117 return retval; 118 119 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 120 request, USB_RT_ACM, value, 121 acm->control->altsetting[0].desc.bInterfaceNumber, 122 buf, len, 5000); 123 124 dev_dbg(&acm->control->dev, 125 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 126 __func__, request, value, len, retval); 127 128 usb_autopm_put_interface(acm->control); 129 130 return retval < 0 ? retval : 0; 131 } 132 133 /* devices aren't required to support these requests. 134 * the cdc acm descriptor tells whether they do... 135 */ 136 static inline int acm_set_control(struct acm *acm, int control) 137 { 138 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 139 return -EOPNOTSUPP; 140 141 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 142 control, NULL, 0); 143 } 144 145 #define acm_set_line(acm, line) \ 146 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 147 #define acm_send_break(acm, ms) \ 148 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 149 150 static void acm_kill_urbs(struct acm *acm) 151 { 152 int i; 153 154 usb_kill_urb(acm->ctrlurb); 155 for (i = 0; i < ACM_NW; i++) 156 usb_kill_urb(acm->wb[i].urb); 157 for (i = 0; i < acm->rx_buflimit; i++) 158 usb_kill_urb(acm->read_urbs[i]); 159 } 160 161 /* 162 * Write buffer management. 163 * All of these assume proper locks taken by the caller. 164 */ 165 166 static int acm_wb_alloc(struct acm *acm) 167 { 168 int i, wbn; 169 struct acm_wb *wb; 170 171 wbn = 0; 172 i = 0; 173 for (;;) { 174 wb = &acm->wb[wbn]; 175 if (!wb->use) { 176 wb->use = 1; 177 wb->len = 0; 178 return wbn; 179 } 180 wbn = (wbn + 1) % ACM_NW; 181 if (++i >= ACM_NW) 182 return -1; 183 } 184 } 185 186 static int acm_wb_is_avail(struct acm *acm) 187 { 188 int i, n; 189 unsigned long flags; 190 191 n = ACM_NW; 192 spin_lock_irqsave(&acm->write_lock, flags); 193 for (i = 0; i < ACM_NW; i++) 194 n -= acm->wb[i].use; 195 spin_unlock_irqrestore(&acm->write_lock, flags); 196 return n; 197 } 198 199 /* 200 * Finish write. Caller must hold acm->write_lock 201 */ 202 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 203 { 204 wb->use = 0; 205 acm->transmitting--; 206 usb_autopm_put_interface_async(acm->control); 207 } 208 209 /* 210 * Poke write. 211 * 212 * the caller is responsible for locking 213 */ 214 215 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 216 { 217 int rc; 218 219 acm->transmitting++; 220 221 wb->urb->transfer_buffer = wb->buf; 222 wb->urb->transfer_dma = wb->dmah; 223 wb->urb->transfer_buffer_length = wb->len; 224 wb->urb->dev = acm->dev; 225 226 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 227 if (rc < 0) { 228 dev_err(&acm->data->dev, 229 "%s - usb_submit_urb(write bulk) failed: %d\n", 230 __func__, rc); 231 acm_write_done(acm, wb); 232 } 233 return rc; 234 } 235 236 /* 237 * attributes exported through sysfs 238 */ 239 static ssize_t bmCapabilities_show 240 (struct device *dev, struct device_attribute *attr, char *buf) 241 { 242 struct usb_interface *intf = to_usb_interface(dev); 243 struct acm *acm = usb_get_intfdata(intf); 244 245 return sprintf(buf, "%d", acm->ctrl_caps); 246 } 247 static DEVICE_ATTR_RO(bmCapabilities); 248 249 static ssize_t wCountryCodes_show 250 (struct device *dev, struct device_attribute *attr, char *buf) 251 { 252 struct usb_interface *intf = to_usb_interface(dev); 253 struct acm *acm = usb_get_intfdata(intf); 254 255 memcpy(buf, acm->country_codes, acm->country_code_size); 256 return acm->country_code_size; 257 } 258 259 static DEVICE_ATTR_RO(wCountryCodes); 260 261 static ssize_t iCountryCodeRelDate_show 262 (struct device *dev, struct device_attribute *attr, char *buf) 263 { 264 struct usb_interface *intf = to_usb_interface(dev); 265 struct acm *acm = usb_get_intfdata(intf); 266 267 return sprintf(buf, "%d", acm->country_rel_date); 268 } 269 270 static DEVICE_ATTR_RO(iCountryCodeRelDate); 271 /* 272 * Interrupt handlers for various ACM device responses 273 */ 274 275 static void acm_process_notification(struct acm *acm, unsigned char *buf) 276 { 277 int newctrl; 278 int difference; 279 unsigned long flags; 280 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 281 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 282 283 switch (dr->bNotificationType) { 284 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 285 dev_dbg(&acm->control->dev, 286 "%s - network connection: %d\n", __func__, dr->wValue); 287 break; 288 289 case USB_CDC_NOTIFY_SERIAL_STATE: 290 if (le16_to_cpu(dr->wLength) != 2) { 291 dev_dbg(&acm->control->dev, 292 "%s - malformed serial state\n", __func__); 293 break; 294 } 295 296 newctrl = get_unaligned_le16(data); 297 dev_dbg(&acm->control->dev, 298 "%s - serial state: 0x%x\n", __func__, newctrl); 299 300 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 301 dev_dbg(&acm->control->dev, 302 "%s - calling hangup\n", __func__); 303 tty_port_tty_hangup(&acm->port, false); 304 } 305 306 difference = acm->ctrlin ^ newctrl; 307 spin_lock_irqsave(&acm->read_lock, flags); 308 acm->ctrlin = newctrl; 309 acm->oldcount = acm->iocount; 310 311 if (difference & ACM_CTRL_DSR) 312 acm->iocount.dsr++; 313 if (difference & ACM_CTRL_DCD) 314 acm->iocount.dcd++; 315 if (newctrl & ACM_CTRL_BRK) 316 acm->iocount.brk++; 317 if (newctrl & ACM_CTRL_RI) 318 acm->iocount.rng++; 319 if (newctrl & ACM_CTRL_FRAMING) 320 acm->iocount.frame++; 321 if (newctrl & ACM_CTRL_PARITY) 322 acm->iocount.parity++; 323 if (newctrl & ACM_CTRL_OVERRUN) 324 acm->iocount.overrun++; 325 spin_unlock_irqrestore(&acm->read_lock, flags); 326 327 if (difference) 328 wake_up_all(&acm->wioctl); 329 330 break; 331 332 default: 333 dev_dbg(&acm->control->dev, 334 "%s - unknown notification %d received: index %d len %d\n", 335 __func__, 336 dr->bNotificationType, dr->wIndex, dr->wLength); 337 } 338 } 339 340 /* control interface reports status changes with "interrupt" transfers */ 341 static void acm_ctrl_irq(struct urb *urb) 342 { 343 struct acm *acm = urb->context; 344 struct usb_cdc_notification *dr = urb->transfer_buffer; 345 unsigned int current_size = urb->actual_length; 346 unsigned int expected_size, copy_size, alloc_size; 347 int retval; 348 int status = urb->status; 349 350 switch (status) { 351 case 0: 352 /* success */ 353 break; 354 case -ECONNRESET: 355 case -ENOENT: 356 case -ESHUTDOWN: 357 /* this urb is terminated, clean up */ 358 dev_dbg(&acm->control->dev, 359 "%s - urb shutting down with status: %d\n", 360 __func__, status); 361 return; 362 default: 363 dev_dbg(&acm->control->dev, 364 "%s - nonzero urb status received: %d\n", 365 __func__, status); 366 goto exit; 367 } 368 369 usb_mark_last_busy(acm->dev); 370 371 if (acm->nb_index) 372 dr = (struct usb_cdc_notification *)acm->notification_buffer; 373 374 /* size = notification-header + (optional) data */ 375 expected_size = sizeof(struct usb_cdc_notification) + 376 le16_to_cpu(dr->wLength); 377 378 if (current_size < expected_size) { 379 /* notification is transmitted fragmented, reassemble */ 380 if (acm->nb_size < expected_size) { 381 if (acm->nb_size) { 382 kfree(acm->notification_buffer); 383 acm->nb_size = 0; 384 } 385 alloc_size = roundup_pow_of_two(expected_size); 386 /* 387 * kmalloc ensures a valid notification_buffer after a 388 * use of kfree in case the previous allocation was too 389 * small. Final freeing is done on disconnect. 390 */ 391 acm->notification_buffer = 392 kmalloc(alloc_size, GFP_ATOMIC); 393 if (!acm->notification_buffer) 394 goto exit; 395 acm->nb_size = alloc_size; 396 } 397 398 copy_size = min(current_size, 399 expected_size - acm->nb_index); 400 401 memcpy(&acm->notification_buffer[acm->nb_index], 402 urb->transfer_buffer, copy_size); 403 acm->nb_index += copy_size; 404 current_size = acm->nb_index; 405 } 406 407 if (current_size >= expected_size) { 408 /* notification complete */ 409 acm_process_notification(acm, (unsigned char *)dr); 410 acm->nb_index = 0; 411 } 412 413 exit: 414 retval = usb_submit_urb(urb, GFP_ATOMIC); 415 if (retval && retval != -EPERM) 416 dev_err(&acm->control->dev, 417 "%s - usb_submit_urb failed: %d\n", __func__, retval); 418 } 419 420 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 421 { 422 int res; 423 424 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 425 return 0; 426 427 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 428 if (res) { 429 if (res != -EPERM && res != -ENODEV) { 430 dev_err(&acm->data->dev, 431 "urb %d failed submission with %d\n", 432 index, res); 433 } 434 set_bit(index, &acm->read_urbs_free); 435 return res; 436 } else { 437 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 438 } 439 440 return 0; 441 } 442 443 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 444 { 445 int res; 446 int i; 447 448 for (i = 0; i < acm->rx_buflimit; ++i) { 449 res = acm_submit_read_urb(acm, i, mem_flags); 450 if (res) 451 return res; 452 } 453 454 return 0; 455 } 456 457 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 458 { 459 if (!urb->actual_length) 460 return; 461 462 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 463 urb->actual_length); 464 tty_flip_buffer_push(&acm->port); 465 } 466 467 static void acm_read_bulk_callback(struct urb *urb) 468 { 469 struct acm_rb *rb = urb->context; 470 struct acm *acm = rb->instance; 471 unsigned long flags; 472 int status = urb->status; 473 474 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 475 rb->index, urb->actual_length, status); 476 477 set_bit(rb->index, &acm->read_urbs_free); 478 479 if (!acm->dev) { 480 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 481 return; 482 } 483 484 switch (status) { 485 case 0: 486 usb_mark_last_busy(acm->dev); 487 acm_process_read_urb(acm, urb); 488 break; 489 case -EPIPE: 490 set_bit(EVENT_RX_STALL, &acm->flags); 491 schedule_work(&acm->work); 492 return; 493 case -ENOENT: 494 case -ECONNRESET: 495 case -ESHUTDOWN: 496 dev_dbg(&acm->data->dev, 497 "%s - urb shutting down with status: %d\n", 498 __func__, status); 499 return; 500 default: 501 dev_dbg(&acm->data->dev, 502 "%s - nonzero urb status received: %d\n", 503 __func__, status); 504 break; 505 } 506 507 /* 508 * Unthrottle may run on another CPU which needs to see events 509 * in the same order. Submission has an implict barrier 510 */ 511 smp_mb__before_atomic(); 512 513 /* throttle device if requested by tty */ 514 spin_lock_irqsave(&acm->read_lock, flags); 515 acm->throttled = acm->throttle_req; 516 if (!acm->throttled) { 517 spin_unlock_irqrestore(&acm->read_lock, flags); 518 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 519 } else { 520 spin_unlock_irqrestore(&acm->read_lock, flags); 521 } 522 } 523 524 /* data interface wrote those outgoing bytes */ 525 static void acm_write_bulk(struct urb *urb) 526 { 527 struct acm_wb *wb = urb->context; 528 struct acm *acm = wb->instance; 529 unsigned long flags; 530 int status = urb->status; 531 532 if (status || (urb->actual_length != urb->transfer_buffer_length)) 533 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 534 urb->actual_length, 535 urb->transfer_buffer_length, 536 status); 537 538 spin_lock_irqsave(&acm->write_lock, flags); 539 acm_write_done(acm, wb); 540 spin_unlock_irqrestore(&acm->write_lock, flags); 541 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 542 schedule_work(&acm->work); 543 } 544 545 static void acm_softint(struct work_struct *work) 546 { 547 int i; 548 struct acm *acm = container_of(work, struct acm, work); 549 550 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 551 if (!(usb_autopm_get_interface(acm->data))) { 552 for (i = 0; i < acm->rx_buflimit; i++) 553 usb_kill_urb(acm->read_urbs[i]); 554 usb_clear_halt(acm->dev, acm->in); 555 acm_submit_read_urbs(acm, GFP_KERNEL); 556 usb_autopm_put_interface(acm->data); 557 } 558 clear_bit(EVENT_RX_STALL, &acm->flags); 559 } 560 561 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) { 562 tty_port_tty_wakeup(&acm->port); 563 clear_bit(EVENT_TTY_WAKEUP, &acm->flags); 564 } 565 } 566 567 /* 568 * TTY handlers 569 */ 570 571 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 572 { 573 struct acm *acm; 574 int retval; 575 576 acm = acm_get_by_minor(tty->index); 577 if (!acm) 578 return -ENODEV; 579 580 retval = tty_standard_install(driver, tty); 581 if (retval) 582 goto error_init_termios; 583 584 tty->driver_data = acm; 585 586 return 0; 587 588 error_init_termios: 589 tty_port_put(&acm->port); 590 return retval; 591 } 592 593 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 594 { 595 struct acm *acm = tty->driver_data; 596 597 return tty_port_open(&acm->port, tty, filp); 598 } 599 600 static void acm_port_dtr_rts(struct tty_port *port, int raise) 601 { 602 struct acm *acm = container_of(port, struct acm, port); 603 int val; 604 int res; 605 606 if (raise) 607 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 608 else 609 val = 0; 610 611 /* FIXME: add missing ctrlout locking throughout driver */ 612 acm->ctrlout = val; 613 614 res = acm_set_control(acm, val); 615 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 616 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 617 } 618 619 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 620 { 621 struct acm *acm = container_of(port, struct acm, port); 622 int retval = -ENODEV; 623 int i; 624 625 mutex_lock(&acm->mutex); 626 if (acm->disconnected) 627 goto disconnected; 628 629 retval = usb_autopm_get_interface(acm->control); 630 if (retval) 631 goto error_get_interface; 632 633 /* 634 * FIXME: Why do we need this? Allocating 64K of physically contiguous 635 * memory is really nasty... 636 */ 637 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 638 acm->control->needs_remote_wakeup = 1; 639 640 acm->ctrlurb->dev = acm->dev; 641 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 642 if (retval) { 643 dev_err(&acm->control->dev, 644 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 645 goto error_submit_urb; 646 } 647 648 acm_tty_set_termios(tty, NULL); 649 650 /* 651 * Unthrottle device in case the TTY was closed while throttled. 652 */ 653 spin_lock_irq(&acm->read_lock); 654 acm->throttled = 0; 655 acm->throttle_req = 0; 656 spin_unlock_irq(&acm->read_lock); 657 658 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 659 if (retval) 660 goto error_submit_read_urbs; 661 662 usb_autopm_put_interface(acm->control); 663 664 mutex_unlock(&acm->mutex); 665 666 return 0; 667 668 error_submit_read_urbs: 669 for (i = 0; i < acm->rx_buflimit; i++) 670 usb_kill_urb(acm->read_urbs[i]); 671 usb_kill_urb(acm->ctrlurb); 672 error_submit_urb: 673 usb_autopm_put_interface(acm->control); 674 error_get_interface: 675 disconnected: 676 mutex_unlock(&acm->mutex); 677 678 return usb_translate_errors(retval); 679 } 680 681 static void acm_port_destruct(struct tty_port *port) 682 { 683 struct acm *acm = container_of(port, struct acm, port); 684 685 acm_release_minor(acm); 686 usb_put_intf(acm->control); 687 kfree(acm->country_codes); 688 kfree(acm); 689 } 690 691 static void acm_port_shutdown(struct tty_port *port) 692 { 693 struct acm *acm = container_of(port, struct acm, port); 694 struct urb *urb; 695 struct acm_wb *wb; 696 697 /* 698 * Need to grab write_lock to prevent race with resume, but no need to 699 * hold it due to the tty-port initialised flag. 700 */ 701 spin_lock_irq(&acm->write_lock); 702 spin_unlock_irq(&acm->write_lock); 703 704 usb_autopm_get_interface_no_resume(acm->control); 705 acm->control->needs_remote_wakeup = 0; 706 usb_autopm_put_interface(acm->control); 707 708 for (;;) { 709 urb = usb_get_from_anchor(&acm->delayed); 710 if (!urb) 711 break; 712 wb = urb->context; 713 wb->use = 0; 714 usb_autopm_put_interface_async(acm->control); 715 } 716 717 acm_kill_urbs(acm); 718 } 719 720 static void acm_tty_cleanup(struct tty_struct *tty) 721 { 722 struct acm *acm = tty->driver_data; 723 724 tty_port_put(&acm->port); 725 } 726 727 static void acm_tty_hangup(struct tty_struct *tty) 728 { 729 struct acm *acm = tty->driver_data; 730 731 tty_port_hangup(&acm->port); 732 } 733 734 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 735 { 736 struct acm *acm = tty->driver_data; 737 738 tty_port_close(&acm->port, tty, filp); 739 } 740 741 static int acm_tty_write(struct tty_struct *tty, 742 const unsigned char *buf, int count) 743 { 744 struct acm *acm = tty->driver_data; 745 int stat; 746 unsigned long flags; 747 int wbn; 748 struct acm_wb *wb; 749 750 if (!count) 751 return 0; 752 753 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 754 755 spin_lock_irqsave(&acm->write_lock, flags); 756 wbn = acm_wb_alloc(acm); 757 if (wbn < 0) { 758 spin_unlock_irqrestore(&acm->write_lock, flags); 759 return 0; 760 } 761 wb = &acm->wb[wbn]; 762 763 if (!acm->dev) { 764 wb->use = 0; 765 spin_unlock_irqrestore(&acm->write_lock, flags); 766 return -ENODEV; 767 } 768 769 count = (count > acm->writesize) ? acm->writesize : count; 770 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 771 memcpy(wb->buf, buf, count); 772 wb->len = count; 773 774 stat = usb_autopm_get_interface_async(acm->control); 775 if (stat) { 776 wb->use = 0; 777 spin_unlock_irqrestore(&acm->write_lock, flags); 778 return stat; 779 } 780 781 if (acm->susp_count) { 782 usb_anchor_urb(wb->urb, &acm->delayed); 783 spin_unlock_irqrestore(&acm->write_lock, flags); 784 return count; 785 } 786 787 stat = acm_start_wb(acm, wb); 788 spin_unlock_irqrestore(&acm->write_lock, flags); 789 790 if (stat < 0) 791 return stat; 792 return count; 793 } 794 795 static int acm_tty_write_room(struct tty_struct *tty) 796 { 797 struct acm *acm = tty->driver_data; 798 /* 799 * Do not let the line discipline to know that we have a reserve, 800 * or it might get too enthusiastic. 801 */ 802 return acm_wb_is_avail(acm) ? acm->writesize : 0; 803 } 804 805 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 806 { 807 struct acm *acm = tty->driver_data; 808 /* 809 * if the device was unplugged then any remaining characters fell out 810 * of the connector ;) 811 */ 812 if (acm->disconnected) 813 return 0; 814 /* 815 * This is inaccurate (overcounts), but it works. 816 */ 817 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 818 } 819 820 static void acm_tty_throttle(struct tty_struct *tty) 821 { 822 struct acm *acm = tty->driver_data; 823 824 spin_lock_irq(&acm->read_lock); 825 acm->throttle_req = 1; 826 spin_unlock_irq(&acm->read_lock); 827 } 828 829 static void acm_tty_unthrottle(struct tty_struct *tty) 830 { 831 struct acm *acm = tty->driver_data; 832 unsigned int was_throttled; 833 834 spin_lock_irq(&acm->read_lock); 835 was_throttled = acm->throttled; 836 acm->throttled = 0; 837 acm->throttle_req = 0; 838 spin_unlock_irq(&acm->read_lock); 839 840 if (was_throttled) 841 acm_submit_read_urbs(acm, GFP_KERNEL); 842 } 843 844 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 845 { 846 struct acm *acm = tty->driver_data; 847 int retval; 848 849 retval = acm_send_break(acm, state ? 0xffff : 0); 850 if (retval < 0) 851 dev_dbg(&acm->control->dev, 852 "%s - send break failed\n", __func__); 853 return retval; 854 } 855 856 static int acm_tty_tiocmget(struct tty_struct *tty) 857 { 858 struct acm *acm = tty->driver_data; 859 860 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 861 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 862 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 863 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 864 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 865 TIOCM_CTS; 866 } 867 868 static int acm_tty_tiocmset(struct tty_struct *tty, 869 unsigned int set, unsigned int clear) 870 { 871 struct acm *acm = tty->driver_data; 872 unsigned int newctrl; 873 874 newctrl = acm->ctrlout; 875 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 876 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 877 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 878 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 879 880 newctrl = (newctrl & ~clear) | set; 881 882 if (acm->ctrlout == newctrl) 883 return 0; 884 return acm_set_control(acm, acm->ctrlout = newctrl); 885 } 886 887 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 888 { 889 struct acm *acm = tty->driver_data; 890 891 ss->xmit_fifo_size = acm->writesize; 892 ss->baud_base = le32_to_cpu(acm->line.dwDTERate); 893 ss->close_delay = acm->port.close_delay / 10; 894 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 895 ASYNC_CLOSING_WAIT_NONE : 896 acm->port.closing_wait / 10; 897 return 0; 898 } 899 900 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 901 { 902 struct acm *acm = tty->driver_data; 903 unsigned int closing_wait, close_delay; 904 int retval = 0; 905 906 close_delay = ss->close_delay * 10; 907 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 908 ASYNC_CLOSING_WAIT_NONE : ss->closing_wait * 10; 909 910 mutex_lock(&acm->port.mutex); 911 912 if (!capable(CAP_SYS_ADMIN)) { 913 if ((close_delay != acm->port.close_delay) || 914 (closing_wait != acm->port.closing_wait)) 915 retval = -EPERM; 916 else 917 retval = -EOPNOTSUPP; 918 } else { 919 acm->port.close_delay = close_delay; 920 acm->port.closing_wait = closing_wait; 921 } 922 923 mutex_unlock(&acm->port.mutex); 924 return retval; 925 } 926 927 static int wait_serial_change(struct acm *acm, unsigned long arg) 928 { 929 int rv = 0; 930 DECLARE_WAITQUEUE(wait, current); 931 struct async_icount old, new; 932 933 do { 934 spin_lock_irq(&acm->read_lock); 935 old = acm->oldcount; 936 new = acm->iocount; 937 acm->oldcount = new; 938 spin_unlock_irq(&acm->read_lock); 939 940 if ((arg & TIOCM_DSR) && 941 old.dsr != new.dsr) 942 break; 943 if ((arg & TIOCM_CD) && 944 old.dcd != new.dcd) 945 break; 946 if ((arg & TIOCM_RI) && 947 old.rng != new.rng) 948 break; 949 950 add_wait_queue(&acm->wioctl, &wait); 951 set_current_state(TASK_INTERRUPTIBLE); 952 schedule(); 953 remove_wait_queue(&acm->wioctl, &wait); 954 if (acm->disconnected) { 955 if (arg & TIOCM_CD) 956 break; 957 else 958 rv = -ENODEV; 959 } else { 960 if (signal_pending(current)) 961 rv = -ERESTARTSYS; 962 } 963 } while (!rv); 964 965 966 967 return rv; 968 } 969 970 static int acm_tty_get_icount(struct tty_struct *tty, 971 struct serial_icounter_struct *icount) 972 { 973 struct acm *acm = tty->driver_data; 974 975 icount->dsr = acm->iocount.dsr; 976 icount->rng = acm->iocount.rng; 977 icount->dcd = acm->iocount.dcd; 978 icount->frame = acm->iocount.frame; 979 icount->overrun = acm->iocount.overrun; 980 icount->parity = acm->iocount.parity; 981 icount->brk = acm->iocount.brk; 982 983 return 0; 984 } 985 986 static int acm_tty_ioctl(struct tty_struct *tty, 987 unsigned int cmd, unsigned long arg) 988 { 989 struct acm *acm = tty->driver_data; 990 int rv = -ENOIOCTLCMD; 991 992 switch (cmd) { 993 case TIOCMIWAIT: 994 rv = usb_autopm_get_interface(acm->control); 995 if (rv < 0) { 996 rv = -EIO; 997 break; 998 } 999 rv = wait_serial_change(acm, arg); 1000 usb_autopm_put_interface(acm->control); 1001 break; 1002 } 1003 1004 return rv; 1005 } 1006 1007 static void acm_tty_set_termios(struct tty_struct *tty, 1008 struct ktermios *termios_old) 1009 { 1010 struct acm *acm = tty->driver_data; 1011 struct ktermios *termios = &tty->termios; 1012 struct usb_cdc_line_coding newline; 1013 int newctrl = acm->ctrlout; 1014 1015 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1016 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1017 newline.bParityType = termios->c_cflag & PARENB ? 1018 (termios->c_cflag & PARODD ? 1 : 2) + 1019 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1020 switch (termios->c_cflag & CSIZE) { 1021 case CS5: 1022 newline.bDataBits = 5; 1023 break; 1024 case CS6: 1025 newline.bDataBits = 6; 1026 break; 1027 case CS7: 1028 newline.bDataBits = 7; 1029 break; 1030 case CS8: 1031 default: 1032 newline.bDataBits = 8; 1033 break; 1034 } 1035 /* FIXME: Needs to clear unsupported bits in the termios */ 1036 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1037 1038 if (C_BAUD(tty) == B0) { 1039 newline.dwDTERate = acm->line.dwDTERate; 1040 newctrl &= ~ACM_CTRL_DTR; 1041 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1042 newctrl |= ACM_CTRL_DTR; 1043 } 1044 1045 if (newctrl != acm->ctrlout) 1046 acm_set_control(acm, acm->ctrlout = newctrl); 1047 1048 if (memcmp(&acm->line, &newline, sizeof newline)) { 1049 memcpy(&acm->line, &newline, sizeof newline); 1050 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1051 __func__, 1052 le32_to_cpu(newline.dwDTERate), 1053 newline.bCharFormat, newline.bParityType, 1054 newline.bDataBits); 1055 acm_set_line(acm, &acm->line); 1056 } 1057 } 1058 1059 static const struct tty_port_operations acm_port_ops = { 1060 .dtr_rts = acm_port_dtr_rts, 1061 .shutdown = acm_port_shutdown, 1062 .activate = acm_port_activate, 1063 .destruct = acm_port_destruct, 1064 }; 1065 1066 /* 1067 * USB probe and disconnect routines. 1068 */ 1069 1070 /* Little helpers: write/read buffers free */ 1071 static void acm_write_buffers_free(struct acm *acm) 1072 { 1073 int i; 1074 struct acm_wb *wb; 1075 1076 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1077 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1078 } 1079 1080 static void acm_read_buffers_free(struct acm *acm) 1081 { 1082 int i; 1083 1084 for (i = 0; i < acm->rx_buflimit; i++) 1085 usb_free_coherent(acm->dev, acm->readsize, 1086 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1087 } 1088 1089 /* Little helper: write buffers allocate */ 1090 static int acm_write_buffers_alloc(struct acm *acm) 1091 { 1092 int i; 1093 struct acm_wb *wb; 1094 1095 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1096 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1097 &wb->dmah); 1098 if (!wb->buf) { 1099 while (i != 0) { 1100 --i; 1101 --wb; 1102 usb_free_coherent(acm->dev, acm->writesize, 1103 wb->buf, wb->dmah); 1104 } 1105 return -ENOMEM; 1106 } 1107 } 1108 return 0; 1109 } 1110 1111 static int acm_probe(struct usb_interface *intf, 1112 const struct usb_device_id *id) 1113 { 1114 struct usb_cdc_union_desc *union_header = NULL; 1115 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1116 unsigned char *buffer = intf->altsetting->extra; 1117 int buflen = intf->altsetting->extralen; 1118 struct usb_interface *control_interface; 1119 struct usb_interface *data_interface; 1120 struct usb_endpoint_descriptor *epctrl = NULL; 1121 struct usb_endpoint_descriptor *epread = NULL; 1122 struct usb_endpoint_descriptor *epwrite = NULL; 1123 struct usb_device *usb_dev = interface_to_usbdev(intf); 1124 struct usb_cdc_parsed_header h; 1125 struct acm *acm; 1126 int minor; 1127 int ctrlsize, readsize; 1128 u8 *buf; 1129 int call_intf_num = -1; 1130 int data_intf_num = -1; 1131 unsigned long quirks; 1132 int num_rx_buf; 1133 int i; 1134 int combined_interfaces = 0; 1135 struct device *tty_dev; 1136 int rv = -ENOMEM; 1137 int res; 1138 1139 /* normal quirks */ 1140 quirks = (unsigned long)id->driver_info; 1141 1142 if (quirks == IGNORE_DEVICE) 1143 return -ENODEV; 1144 1145 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1146 1147 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1148 1149 /* handle quirks deadly to normal probing*/ 1150 if (quirks == NO_UNION_NORMAL) { 1151 data_interface = usb_ifnum_to_if(usb_dev, 1); 1152 control_interface = usb_ifnum_to_if(usb_dev, 0); 1153 /* we would crash */ 1154 if (!data_interface || !control_interface) 1155 return -ENODEV; 1156 goto skip_normal_probe; 1157 } 1158 1159 /* normal probing*/ 1160 if (!buffer) { 1161 dev_err(&intf->dev, "Weird descriptor references\n"); 1162 return -EINVAL; 1163 } 1164 1165 if (!intf->cur_altsetting) 1166 return -EINVAL; 1167 1168 if (!buflen) { 1169 if (intf->cur_altsetting->endpoint && 1170 intf->cur_altsetting->endpoint->extralen && 1171 intf->cur_altsetting->endpoint->extra) { 1172 dev_dbg(&intf->dev, 1173 "Seeking extra descriptors on endpoint\n"); 1174 buflen = intf->cur_altsetting->endpoint->extralen; 1175 buffer = intf->cur_altsetting->endpoint->extra; 1176 } else { 1177 dev_err(&intf->dev, 1178 "Zero length descriptor references\n"); 1179 return -EINVAL; 1180 } 1181 } 1182 1183 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1184 union_header = h.usb_cdc_union_desc; 1185 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1186 if (cmgmd) 1187 call_intf_num = cmgmd->bDataInterface; 1188 1189 if (!union_header) { 1190 if (call_intf_num > 0) { 1191 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1192 /* quirks for Droids MuIn LCD */ 1193 if (quirks & NO_DATA_INTERFACE) { 1194 data_interface = usb_ifnum_to_if(usb_dev, 0); 1195 } else { 1196 data_intf_num = call_intf_num; 1197 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1198 } 1199 control_interface = intf; 1200 } else { 1201 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1202 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1203 return -ENODEV; 1204 } else { 1205 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1206 combined_interfaces = 1; 1207 control_interface = data_interface = intf; 1208 goto look_for_collapsed_interface; 1209 } 1210 } 1211 } else { 1212 data_intf_num = union_header->bSlaveInterface0; 1213 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1214 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1215 } 1216 1217 if (!control_interface || !data_interface) { 1218 dev_dbg(&intf->dev, "no interfaces\n"); 1219 return -ENODEV; 1220 } 1221 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1222 return -ENODEV; 1223 1224 if (data_intf_num != call_intf_num) 1225 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1226 1227 if (control_interface == data_interface) { 1228 /* some broken devices designed for windows work this way */ 1229 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1230 combined_interfaces = 1; 1231 /* a popular other OS doesn't use it */ 1232 quirks |= NO_CAP_LINE; 1233 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1234 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1235 return -EINVAL; 1236 } 1237 look_for_collapsed_interface: 1238 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1239 &epread, &epwrite, &epctrl, NULL); 1240 if (res) 1241 return res; 1242 1243 goto made_compressed_probe; 1244 } 1245 1246 skip_normal_probe: 1247 1248 /*workaround for switched interfaces */ 1249 if (data_interface->cur_altsetting->desc.bInterfaceClass 1250 != CDC_DATA_INTERFACE_TYPE) { 1251 if (control_interface->cur_altsetting->desc.bInterfaceClass 1252 == CDC_DATA_INTERFACE_TYPE) { 1253 dev_dbg(&intf->dev, 1254 "Your device has switched interfaces.\n"); 1255 swap(control_interface, data_interface); 1256 } else { 1257 return -EINVAL; 1258 } 1259 } 1260 1261 /* Accept probe requests only for the control interface */ 1262 if (!combined_interfaces && intf != control_interface) 1263 return -ENODEV; 1264 1265 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1266 /* valid in this context */ 1267 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1268 return -EBUSY; 1269 } 1270 1271 1272 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1273 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1274 return -EINVAL; 1275 1276 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1277 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1278 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1279 1280 1281 /* workaround for switched endpoints */ 1282 if (!usb_endpoint_dir_in(epread)) { 1283 /* descriptors are swapped */ 1284 dev_dbg(&intf->dev, 1285 "The data interface has switched endpoints\n"); 1286 swap(epread, epwrite); 1287 } 1288 made_compressed_probe: 1289 dev_dbg(&intf->dev, "interfaces are valid\n"); 1290 1291 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1292 if (acm == NULL) 1293 goto alloc_fail; 1294 1295 tty_port_init(&acm->port); 1296 acm->port.ops = &acm_port_ops; 1297 1298 minor = acm_alloc_minor(acm); 1299 if (minor < 0) 1300 goto alloc_fail1; 1301 1302 ctrlsize = usb_endpoint_maxp(epctrl); 1303 readsize = usb_endpoint_maxp(epread) * 1304 (quirks == SINGLE_RX_URB ? 1 : 2); 1305 acm->combined_interfaces = combined_interfaces; 1306 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1307 acm->control = control_interface; 1308 acm->data = data_interface; 1309 acm->minor = minor; 1310 acm->dev = usb_dev; 1311 if (h.usb_cdc_acm_descriptor) 1312 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1313 if (quirks & NO_CAP_LINE) 1314 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1315 acm->ctrlsize = ctrlsize; 1316 acm->readsize = readsize; 1317 acm->rx_buflimit = num_rx_buf; 1318 INIT_WORK(&acm->work, acm_softint); 1319 init_waitqueue_head(&acm->wioctl); 1320 spin_lock_init(&acm->write_lock); 1321 spin_lock_init(&acm->read_lock); 1322 mutex_init(&acm->mutex); 1323 if (usb_endpoint_xfer_int(epread)) { 1324 acm->bInterval = epread->bInterval; 1325 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1326 } else { 1327 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1328 } 1329 if (usb_endpoint_xfer_int(epwrite)) 1330 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1331 else 1332 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1333 init_usb_anchor(&acm->delayed); 1334 acm->quirks = quirks; 1335 1336 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1337 if (!buf) 1338 goto alloc_fail1; 1339 acm->ctrl_buffer = buf; 1340 1341 if (acm_write_buffers_alloc(acm) < 0) 1342 goto alloc_fail2; 1343 1344 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1345 if (!acm->ctrlurb) 1346 goto alloc_fail3; 1347 1348 for (i = 0; i < num_rx_buf; i++) { 1349 struct acm_rb *rb = &(acm->read_buffers[i]); 1350 struct urb *urb; 1351 1352 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1353 &rb->dma); 1354 if (!rb->base) 1355 goto alloc_fail4; 1356 rb->index = i; 1357 rb->instance = acm; 1358 1359 urb = usb_alloc_urb(0, GFP_KERNEL); 1360 if (!urb) 1361 goto alloc_fail4; 1362 1363 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1364 urb->transfer_dma = rb->dma; 1365 if (usb_endpoint_xfer_int(epread)) 1366 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1367 acm->readsize, 1368 acm_read_bulk_callback, rb, 1369 acm->bInterval); 1370 else 1371 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1372 acm->readsize, 1373 acm_read_bulk_callback, rb); 1374 1375 acm->read_urbs[i] = urb; 1376 __set_bit(i, &acm->read_urbs_free); 1377 } 1378 for (i = 0; i < ACM_NW; i++) { 1379 struct acm_wb *snd = &(acm->wb[i]); 1380 1381 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1382 if (snd->urb == NULL) 1383 goto alloc_fail5; 1384 1385 if (usb_endpoint_xfer_int(epwrite)) 1386 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1387 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1388 else 1389 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1390 NULL, acm->writesize, acm_write_bulk, snd); 1391 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1392 if (quirks & SEND_ZERO_PACKET) 1393 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1394 snd->instance = acm; 1395 } 1396 1397 usb_set_intfdata(intf, acm); 1398 1399 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1400 if (i < 0) 1401 goto alloc_fail5; 1402 1403 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1404 struct usb_cdc_country_functional_desc * cfd = 1405 h.usb_cdc_country_functional_desc; 1406 1407 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1408 if (!acm->country_codes) 1409 goto skip_countries; 1410 acm->country_code_size = cfd->bLength - 4; 1411 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1412 cfd->bLength - 4); 1413 acm->country_rel_date = cfd->iCountryCodeRelDate; 1414 1415 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1416 if (i < 0) { 1417 kfree(acm->country_codes); 1418 acm->country_codes = NULL; 1419 acm->country_code_size = 0; 1420 goto skip_countries; 1421 } 1422 1423 i = device_create_file(&intf->dev, 1424 &dev_attr_iCountryCodeRelDate); 1425 if (i < 0) { 1426 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1427 kfree(acm->country_codes); 1428 acm->country_codes = NULL; 1429 acm->country_code_size = 0; 1430 goto skip_countries; 1431 } 1432 } 1433 1434 skip_countries: 1435 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1436 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1437 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1438 /* works around buggy devices */ 1439 epctrl->bInterval ? epctrl->bInterval : 16); 1440 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1441 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1442 acm->notification_buffer = NULL; 1443 acm->nb_index = 0; 1444 acm->nb_size = 0; 1445 1446 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1447 1448 acm->line.dwDTERate = cpu_to_le32(9600); 1449 acm->line.bDataBits = 8; 1450 acm_set_line(acm, &acm->line); 1451 1452 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1453 usb_set_intfdata(data_interface, acm); 1454 1455 usb_get_intf(control_interface); 1456 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1457 &control_interface->dev); 1458 if (IS_ERR(tty_dev)) { 1459 rv = PTR_ERR(tty_dev); 1460 goto alloc_fail6; 1461 } 1462 1463 if (quirks & CLEAR_HALT_CONDITIONS) { 1464 usb_clear_halt(usb_dev, acm->in); 1465 usb_clear_halt(usb_dev, acm->out); 1466 } 1467 1468 return 0; 1469 alloc_fail6: 1470 if (acm->country_codes) { 1471 device_remove_file(&acm->control->dev, 1472 &dev_attr_wCountryCodes); 1473 device_remove_file(&acm->control->dev, 1474 &dev_attr_iCountryCodeRelDate); 1475 kfree(acm->country_codes); 1476 } 1477 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1478 alloc_fail5: 1479 usb_set_intfdata(intf, NULL); 1480 for (i = 0; i < ACM_NW; i++) 1481 usb_free_urb(acm->wb[i].urb); 1482 alloc_fail4: 1483 for (i = 0; i < num_rx_buf; i++) 1484 usb_free_urb(acm->read_urbs[i]); 1485 acm_read_buffers_free(acm); 1486 usb_free_urb(acm->ctrlurb); 1487 alloc_fail3: 1488 acm_write_buffers_free(acm); 1489 alloc_fail2: 1490 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1491 alloc_fail1: 1492 tty_port_put(&acm->port); 1493 alloc_fail: 1494 return rv; 1495 } 1496 1497 static void acm_disconnect(struct usb_interface *intf) 1498 { 1499 struct acm *acm = usb_get_intfdata(intf); 1500 struct tty_struct *tty; 1501 int i; 1502 1503 /* sibling interface is already cleaning up */ 1504 if (!acm) 1505 return; 1506 1507 mutex_lock(&acm->mutex); 1508 acm->disconnected = true; 1509 if (acm->country_codes) { 1510 device_remove_file(&acm->control->dev, 1511 &dev_attr_wCountryCodes); 1512 device_remove_file(&acm->control->dev, 1513 &dev_attr_iCountryCodeRelDate); 1514 } 1515 wake_up_all(&acm->wioctl); 1516 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1517 usb_set_intfdata(acm->control, NULL); 1518 usb_set_intfdata(acm->data, NULL); 1519 mutex_unlock(&acm->mutex); 1520 1521 tty = tty_port_tty_get(&acm->port); 1522 if (tty) { 1523 tty_vhangup(tty); 1524 tty_kref_put(tty); 1525 } 1526 1527 acm_kill_urbs(acm); 1528 cancel_work_sync(&acm->work); 1529 1530 tty_unregister_device(acm_tty_driver, acm->minor); 1531 1532 usb_free_urb(acm->ctrlurb); 1533 for (i = 0; i < ACM_NW; i++) 1534 usb_free_urb(acm->wb[i].urb); 1535 for (i = 0; i < acm->rx_buflimit; i++) 1536 usb_free_urb(acm->read_urbs[i]); 1537 acm_write_buffers_free(acm); 1538 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1539 acm_read_buffers_free(acm); 1540 1541 kfree(acm->notification_buffer); 1542 1543 if (!acm->combined_interfaces) 1544 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1545 acm->data : acm->control); 1546 1547 tty_port_put(&acm->port); 1548 } 1549 1550 #ifdef CONFIG_PM 1551 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1552 { 1553 struct acm *acm = usb_get_intfdata(intf); 1554 int cnt; 1555 1556 spin_lock_irq(&acm->write_lock); 1557 if (PMSG_IS_AUTO(message)) { 1558 if (acm->transmitting) { 1559 spin_unlock_irq(&acm->write_lock); 1560 return -EBUSY; 1561 } 1562 } 1563 cnt = acm->susp_count++; 1564 spin_unlock_irq(&acm->write_lock); 1565 1566 if (cnt) 1567 return 0; 1568 1569 acm_kill_urbs(acm); 1570 cancel_work_sync(&acm->work); 1571 1572 return 0; 1573 } 1574 1575 static int acm_resume(struct usb_interface *intf) 1576 { 1577 struct acm *acm = usb_get_intfdata(intf); 1578 struct urb *urb; 1579 int rv = 0; 1580 1581 spin_lock_irq(&acm->write_lock); 1582 1583 if (--acm->susp_count) 1584 goto out; 1585 1586 if (tty_port_initialized(&acm->port)) { 1587 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1588 1589 for (;;) { 1590 urb = usb_get_from_anchor(&acm->delayed); 1591 if (!urb) 1592 break; 1593 1594 acm_start_wb(acm, urb->context); 1595 } 1596 1597 /* 1598 * delayed error checking because we must 1599 * do the write path at all cost 1600 */ 1601 if (rv < 0) 1602 goto out; 1603 1604 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1605 } 1606 out: 1607 spin_unlock_irq(&acm->write_lock); 1608 1609 return rv; 1610 } 1611 1612 static int acm_reset_resume(struct usb_interface *intf) 1613 { 1614 struct acm *acm = usb_get_intfdata(intf); 1615 1616 if (tty_port_initialized(&acm->port)) 1617 tty_port_tty_hangup(&acm->port, false); 1618 1619 return acm_resume(intf); 1620 } 1621 1622 #endif /* CONFIG_PM */ 1623 1624 static int acm_pre_reset(struct usb_interface *intf) 1625 { 1626 struct acm *acm = usb_get_intfdata(intf); 1627 1628 clear_bit(EVENT_RX_STALL, &acm->flags); 1629 acm->nb_index = 0; /* pending control transfers are lost */ 1630 1631 return 0; 1632 } 1633 1634 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1635 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1636 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1637 USB_CDC_ACM_PROTO_VENDOR) 1638 1639 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1640 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1641 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1642 USB_CDC_ACM_PROTO_VENDOR) 1643 1644 /* 1645 * USB driver structure. 1646 */ 1647 1648 static const struct usb_device_id acm_ids[] = { 1649 /* quirky and broken devices */ 1650 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1651 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1652 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1653 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1654 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1655 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1656 }, 1657 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1658 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1659 }, 1660 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1661 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1662 }, 1663 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1664 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1665 }, 1666 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1667 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1668 }, 1669 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1670 .driver_info = SINGLE_RX_URB, 1671 }, 1672 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1673 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1674 }, 1675 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1676 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1677 }, 1678 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1679 .driver_info = SINGLE_RX_URB, 1680 }, 1681 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1682 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1683 }, 1684 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1685 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1686 }, 1687 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1688 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1689 }, 1690 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1691 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1692 }, 1693 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1694 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1695 }, 1696 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1698 }, 1699 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1700 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1701 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1702 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1703 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1704 }, 1705 /* Motorola H24 HSPA module: */ 1706 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1707 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1708 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1709 }, 1710 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1711 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1712 }, 1713 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1714 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1715 }, 1716 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1717 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1718 }, 1719 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1720 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1721 }, 1722 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1723 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1724 }, 1725 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1726 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1727 }, 1728 1729 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1730 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1731 data interface instead of 1732 communications interface. 1733 Maybe we should define a new 1734 quirk for this. */ 1735 }, 1736 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1737 .driver_info = NO_UNION_NORMAL, 1738 }, 1739 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1740 .driver_info = NO_UNION_NORMAL, 1741 }, 1742 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1743 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1744 }, 1745 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1746 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1747 }, 1748 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1749 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1750 }, 1751 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1752 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1753 }, 1754 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1755 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1756 }, 1757 1758 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1759 .driver_info = CLEAR_HALT_CONDITIONS, 1760 }, 1761 1762 /* Nokia S60 phones expose two ACM channels. The first is 1763 * a modem and is picked up by the standard AT-command 1764 * information below. The second is 'vendor-specific' but 1765 * is treated as a serial device at the S60 end, so we want 1766 * to expose it on Linux too. */ 1767 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1768 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1769 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1770 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1771 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1772 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1773 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1774 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1775 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1776 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1777 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1778 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1779 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1780 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1781 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1782 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1783 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1784 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1785 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1786 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1787 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1788 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1789 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1790 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1791 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1792 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1793 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1794 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1795 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1796 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1797 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1798 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1799 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1800 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1801 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1802 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1803 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1804 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1805 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1806 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1807 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1808 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1809 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1810 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1811 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1812 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1813 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1814 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1815 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1816 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1817 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1818 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1820 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1821 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1822 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1823 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1824 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1825 1826 /* Support for Owen devices */ 1827 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1828 1829 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1830 1831 /* Support for Droids MuIn LCD */ 1832 { USB_DEVICE(0x04d8, 0x000b), 1833 .driver_info = NO_DATA_INTERFACE, 1834 }, 1835 1836 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1837 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1838 .driver_info = IGNORE_DEVICE, 1839 }, 1840 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1841 .driver_info = IGNORE_DEVICE, 1842 }, 1843 #endif 1844 1845 /*Samsung phone in firmware update mode */ 1846 { USB_DEVICE(0x04e8, 0x685d), 1847 .driver_info = IGNORE_DEVICE, 1848 }, 1849 1850 /* Exclude Infineon Flash Loader utility */ 1851 { USB_DEVICE(0x058b, 0x0041), 1852 .driver_info = IGNORE_DEVICE, 1853 }, 1854 1855 /* control interfaces without any protocol set */ 1856 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1857 USB_CDC_PROTO_NONE) }, 1858 1859 /* control interfaces with various AT-command sets */ 1860 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1861 USB_CDC_ACM_PROTO_AT_V25TER) }, 1862 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1863 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1864 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1865 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1866 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1867 USB_CDC_ACM_PROTO_AT_GSM) }, 1868 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1869 USB_CDC_ACM_PROTO_AT_3G) }, 1870 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1871 USB_CDC_ACM_PROTO_AT_CDMA) }, 1872 1873 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1874 .driver_info = SEND_ZERO_PACKET, 1875 }, 1876 1877 { } 1878 }; 1879 1880 MODULE_DEVICE_TABLE(usb, acm_ids); 1881 1882 static struct usb_driver acm_driver = { 1883 .name = "cdc_acm", 1884 .probe = acm_probe, 1885 .disconnect = acm_disconnect, 1886 #ifdef CONFIG_PM 1887 .suspend = acm_suspend, 1888 .resume = acm_resume, 1889 .reset_resume = acm_reset_resume, 1890 #endif 1891 .pre_reset = acm_pre_reset, 1892 .id_table = acm_ids, 1893 #ifdef CONFIG_PM 1894 .supports_autosuspend = 1, 1895 #endif 1896 .disable_hub_initiated_lpm = 1, 1897 }; 1898 1899 /* 1900 * TTY driver structures. 1901 */ 1902 1903 static const struct tty_operations acm_ops = { 1904 .install = acm_tty_install, 1905 .open = acm_tty_open, 1906 .close = acm_tty_close, 1907 .cleanup = acm_tty_cleanup, 1908 .hangup = acm_tty_hangup, 1909 .write = acm_tty_write, 1910 .write_room = acm_tty_write_room, 1911 .ioctl = acm_tty_ioctl, 1912 .throttle = acm_tty_throttle, 1913 .unthrottle = acm_tty_unthrottle, 1914 .chars_in_buffer = acm_tty_chars_in_buffer, 1915 .break_ctl = acm_tty_break_ctl, 1916 .set_termios = acm_tty_set_termios, 1917 .tiocmget = acm_tty_tiocmget, 1918 .tiocmset = acm_tty_tiocmset, 1919 .get_serial = get_serial_info, 1920 .set_serial = set_serial_info, 1921 .get_icount = acm_tty_get_icount, 1922 }; 1923 1924 /* 1925 * Init / exit. 1926 */ 1927 1928 static int __init acm_init(void) 1929 { 1930 int retval; 1931 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1932 if (!acm_tty_driver) 1933 return -ENOMEM; 1934 acm_tty_driver->driver_name = "acm", 1935 acm_tty_driver->name = "ttyACM", 1936 acm_tty_driver->major = ACM_TTY_MAJOR, 1937 acm_tty_driver->minor_start = 0, 1938 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1939 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1940 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1941 acm_tty_driver->init_termios = tty_std_termios; 1942 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1943 HUPCL | CLOCAL; 1944 tty_set_operations(acm_tty_driver, &acm_ops); 1945 1946 retval = tty_register_driver(acm_tty_driver); 1947 if (retval) { 1948 put_tty_driver(acm_tty_driver); 1949 return retval; 1950 } 1951 1952 retval = usb_register(&acm_driver); 1953 if (retval) { 1954 tty_unregister_driver(acm_tty_driver); 1955 put_tty_driver(acm_tty_driver); 1956 return retval; 1957 } 1958 1959 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1960 1961 return 0; 1962 } 1963 1964 static void __exit acm_exit(void) 1965 { 1966 usb_deregister(&acm_driver); 1967 tty_unregister_driver(acm_tty_driver); 1968 put_tty_driver(acm_tty_driver); 1969 idr_destroy(&acm_minors); 1970 } 1971 1972 module_init(acm_init); 1973 module_exit(acm_exit); 1974 1975 MODULE_AUTHOR(DRIVER_AUTHOR); 1976 MODULE_DESCRIPTION(DRIVER_DESC); 1977 MODULE_LICENSE("GPL"); 1978 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 1979