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 return wbn; 178 } 179 wbn = (wbn + 1) % ACM_NW; 180 if (++i >= ACM_NW) 181 return -1; 182 } 183 } 184 185 static int acm_wb_is_avail(struct acm *acm) 186 { 187 int i, n; 188 unsigned long flags; 189 190 n = ACM_NW; 191 spin_lock_irqsave(&acm->write_lock, flags); 192 for (i = 0; i < ACM_NW; i++) 193 n -= acm->wb[i].use; 194 spin_unlock_irqrestore(&acm->write_lock, flags); 195 return n; 196 } 197 198 /* 199 * Finish write. Caller must hold acm->write_lock 200 */ 201 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 202 { 203 wb->use = 0; 204 acm->transmitting--; 205 usb_autopm_put_interface_async(acm->control); 206 } 207 208 /* 209 * Poke write. 210 * 211 * the caller is responsible for locking 212 */ 213 214 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 215 { 216 int rc; 217 218 acm->transmitting++; 219 220 wb->urb->transfer_buffer = wb->buf; 221 wb->urb->transfer_dma = wb->dmah; 222 wb->urb->transfer_buffer_length = wb->len; 223 wb->urb->dev = acm->dev; 224 225 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 226 if (rc < 0) { 227 dev_err(&acm->data->dev, 228 "%s - usb_submit_urb(write bulk) failed: %d\n", 229 __func__, rc); 230 acm_write_done(acm, wb); 231 } 232 return rc; 233 } 234 235 /* 236 * attributes exported through sysfs 237 */ 238 static ssize_t bmCapabilities_show 239 (struct device *dev, struct device_attribute *attr, char *buf) 240 { 241 struct usb_interface *intf = to_usb_interface(dev); 242 struct acm *acm = usb_get_intfdata(intf); 243 244 return sprintf(buf, "%d", acm->ctrl_caps); 245 } 246 static DEVICE_ATTR_RO(bmCapabilities); 247 248 static ssize_t wCountryCodes_show 249 (struct device *dev, struct device_attribute *attr, char *buf) 250 { 251 struct usb_interface *intf = to_usb_interface(dev); 252 struct acm *acm = usb_get_intfdata(intf); 253 254 memcpy(buf, acm->country_codes, acm->country_code_size); 255 return acm->country_code_size; 256 } 257 258 static DEVICE_ATTR_RO(wCountryCodes); 259 260 static ssize_t iCountryCodeRelDate_show 261 (struct device *dev, struct device_attribute *attr, char *buf) 262 { 263 struct usb_interface *intf = to_usb_interface(dev); 264 struct acm *acm = usb_get_intfdata(intf); 265 266 return sprintf(buf, "%d", acm->country_rel_date); 267 } 268 269 static DEVICE_ATTR_RO(iCountryCodeRelDate); 270 /* 271 * Interrupt handlers for various ACM device responses 272 */ 273 274 static void acm_process_notification(struct acm *acm, unsigned char *buf) 275 { 276 int newctrl; 277 int difference; 278 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 279 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 280 281 switch (dr->bNotificationType) { 282 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 283 dev_dbg(&acm->control->dev, 284 "%s - network connection: %d\n", __func__, dr->wValue); 285 break; 286 287 case USB_CDC_NOTIFY_SERIAL_STATE: 288 if (le16_to_cpu(dr->wLength) != 2) { 289 dev_dbg(&acm->control->dev, 290 "%s - malformed serial state\n", __func__); 291 break; 292 } 293 294 newctrl = get_unaligned_le16(data); 295 dev_dbg(&acm->control->dev, 296 "%s - serial state: 0x%x\n", __func__, newctrl); 297 298 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 299 dev_dbg(&acm->control->dev, 300 "%s - calling hangup\n", __func__); 301 tty_port_tty_hangup(&acm->port, false); 302 } 303 304 difference = acm->ctrlin ^ newctrl; 305 spin_lock(&acm->read_lock); 306 acm->ctrlin = newctrl; 307 acm->oldcount = acm->iocount; 308 309 if (difference & ACM_CTRL_DSR) 310 acm->iocount.dsr++; 311 if (difference & ACM_CTRL_BRK) 312 acm->iocount.brk++; 313 if (difference & ACM_CTRL_RI) 314 acm->iocount.rng++; 315 if (difference & ACM_CTRL_DCD) 316 acm->iocount.dcd++; 317 if (difference & ACM_CTRL_FRAMING) 318 acm->iocount.frame++; 319 if (difference & ACM_CTRL_PARITY) 320 acm->iocount.parity++; 321 if (difference & ACM_CTRL_OVERRUN) 322 acm->iocount.overrun++; 323 spin_unlock(&acm->read_lock); 324 325 if (difference) 326 wake_up_all(&acm->wioctl); 327 328 break; 329 330 default: 331 dev_dbg(&acm->control->dev, 332 "%s - unknown notification %d received: index %d len %d\n", 333 __func__, 334 dr->bNotificationType, dr->wIndex, dr->wLength); 335 } 336 } 337 338 /* control interface reports status changes with "interrupt" transfers */ 339 static void acm_ctrl_irq(struct urb *urb) 340 { 341 struct acm *acm = urb->context; 342 struct usb_cdc_notification *dr = urb->transfer_buffer; 343 unsigned int current_size = urb->actual_length; 344 unsigned int expected_size, copy_size, alloc_size; 345 int retval; 346 int status = urb->status; 347 348 switch (status) { 349 case 0: 350 /* success */ 351 break; 352 case -ECONNRESET: 353 case -ENOENT: 354 case -ESHUTDOWN: 355 /* this urb is terminated, clean up */ 356 acm->nb_index = 0; 357 dev_dbg(&acm->control->dev, 358 "%s - urb shutting down with status: %d\n", 359 __func__, status); 360 return; 361 default: 362 dev_dbg(&acm->control->dev, 363 "%s - nonzero urb status received: %d\n", 364 __func__, status); 365 goto exit; 366 } 367 368 usb_mark_last_busy(acm->dev); 369 370 if (acm->nb_index) 371 dr = (struct usb_cdc_notification *)acm->notification_buffer; 372 373 /* size = notification-header + (optional) data */ 374 expected_size = sizeof(struct usb_cdc_notification) + 375 le16_to_cpu(dr->wLength); 376 377 if (current_size < expected_size) { 378 /* notification is transmitted fragmented, reassemble */ 379 if (acm->nb_size < expected_size) { 380 if (acm->nb_size) { 381 kfree(acm->notification_buffer); 382 acm->nb_size = 0; 383 } 384 alloc_size = roundup_pow_of_two(expected_size); 385 /* 386 * kmalloc ensures a valid notification_buffer after a 387 * use of kfree in case the previous allocation was too 388 * small. Final freeing is done on disconnect. 389 */ 390 acm->notification_buffer = 391 kmalloc(alloc_size, GFP_ATOMIC); 392 if (!acm->notification_buffer) 393 goto exit; 394 acm->nb_size = alloc_size; 395 } 396 397 copy_size = min(current_size, 398 expected_size - acm->nb_index); 399 400 memcpy(&acm->notification_buffer[acm->nb_index], 401 urb->transfer_buffer, copy_size); 402 acm->nb_index += copy_size; 403 current_size = acm->nb_index; 404 } 405 406 if (current_size >= expected_size) { 407 /* notification complete */ 408 acm_process_notification(acm, (unsigned char *)dr); 409 acm->nb_index = 0; 410 } 411 412 exit: 413 retval = usb_submit_urb(urb, GFP_ATOMIC); 414 if (retval && retval != -EPERM) 415 dev_err(&acm->control->dev, 416 "%s - usb_submit_urb failed: %d\n", __func__, retval); 417 } 418 419 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 420 { 421 int res; 422 423 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 424 return 0; 425 426 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 427 if (res) { 428 if (res != -EPERM && res != -ENODEV) { 429 dev_err(&acm->data->dev, 430 "urb %d failed submission with %d\n", 431 index, res); 432 } 433 set_bit(index, &acm->read_urbs_free); 434 return res; 435 } else { 436 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 437 } 438 439 return 0; 440 } 441 442 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 443 { 444 int res; 445 int i; 446 447 for (i = 0; i < acm->rx_buflimit; ++i) { 448 res = acm_submit_read_urb(acm, i, mem_flags); 449 if (res) 450 return res; 451 } 452 453 return 0; 454 } 455 456 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 457 { 458 if (!urb->actual_length) 459 return; 460 461 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 462 urb->actual_length); 463 tty_flip_buffer_push(&acm->port); 464 } 465 466 static void acm_read_bulk_callback(struct urb *urb) 467 { 468 struct acm_rb *rb = urb->context; 469 struct acm *acm = rb->instance; 470 unsigned long flags; 471 int status = urb->status; 472 473 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 474 rb->index, urb->actual_length, status); 475 476 set_bit(rb->index, &acm->read_urbs_free); 477 478 if (!acm->dev) { 479 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 480 return; 481 } 482 483 switch (status) { 484 case 0: 485 usb_mark_last_busy(acm->dev); 486 acm_process_read_urb(acm, urb); 487 break; 488 case -EPIPE: 489 set_bit(EVENT_RX_STALL, &acm->flags); 490 schedule_work(&acm->work); 491 return; 492 case -ENOENT: 493 case -ECONNRESET: 494 case -ESHUTDOWN: 495 dev_dbg(&acm->data->dev, 496 "%s - urb shutting down with status: %d\n", 497 __func__, status); 498 return; 499 default: 500 dev_dbg(&acm->data->dev, 501 "%s - nonzero urb status received: %d\n", 502 __func__, status); 503 break; 504 } 505 506 /* 507 * Unthrottle may run on another CPU which needs to see events 508 * in the same order. Submission has an implict barrier 509 */ 510 smp_mb__before_atomic(); 511 512 /* throttle device if requested by tty */ 513 spin_lock_irqsave(&acm->read_lock, flags); 514 acm->throttled = acm->throttle_req; 515 if (!acm->throttled) { 516 spin_unlock_irqrestore(&acm->read_lock, flags); 517 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 518 } else { 519 spin_unlock_irqrestore(&acm->read_lock, flags); 520 } 521 } 522 523 /* data interface wrote those outgoing bytes */ 524 static void acm_write_bulk(struct urb *urb) 525 { 526 struct acm_wb *wb = urb->context; 527 struct acm *acm = wb->instance; 528 unsigned long flags; 529 int status = urb->status; 530 531 if (status || (urb->actual_length != urb->transfer_buffer_length)) 532 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 533 urb->actual_length, 534 urb->transfer_buffer_length, 535 status); 536 537 spin_lock_irqsave(&acm->write_lock, flags); 538 acm_write_done(acm, wb); 539 spin_unlock_irqrestore(&acm->write_lock, flags); 540 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 541 schedule_work(&acm->work); 542 } 543 544 static void acm_softint(struct work_struct *work) 545 { 546 int i; 547 struct acm *acm = container_of(work, struct acm, work); 548 549 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 550 if (!(usb_autopm_get_interface(acm->data))) { 551 for (i = 0; i < acm->rx_buflimit; i++) 552 usb_kill_urb(acm->read_urbs[i]); 553 usb_clear_halt(acm->dev, acm->in); 554 acm_submit_read_urbs(acm, GFP_KERNEL); 555 usb_autopm_put_interface(acm->data); 556 } 557 clear_bit(EVENT_RX_STALL, &acm->flags); 558 } 559 560 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) { 561 tty_port_tty_wakeup(&acm->port); 562 clear_bit(EVENT_TTY_WAKEUP, &acm->flags); 563 } 564 } 565 566 /* 567 * TTY handlers 568 */ 569 570 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 571 { 572 struct acm *acm; 573 int retval; 574 575 acm = acm_get_by_minor(tty->index); 576 if (!acm) 577 return -ENODEV; 578 579 retval = tty_standard_install(driver, tty); 580 if (retval) 581 goto error_init_termios; 582 583 tty->driver_data = acm; 584 585 return 0; 586 587 error_init_termios: 588 tty_port_put(&acm->port); 589 return retval; 590 } 591 592 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 593 { 594 struct acm *acm = tty->driver_data; 595 596 return tty_port_open(&acm->port, tty, filp); 597 } 598 599 static void acm_port_dtr_rts(struct tty_port *port, int raise) 600 { 601 struct acm *acm = container_of(port, struct acm, port); 602 int val; 603 int res; 604 605 if (raise) 606 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 607 else 608 val = 0; 609 610 /* FIXME: add missing ctrlout locking throughout driver */ 611 acm->ctrlout = val; 612 613 res = acm_set_control(acm, val); 614 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 615 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 616 } 617 618 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 619 { 620 struct acm *acm = container_of(port, struct acm, port); 621 int retval = -ENODEV; 622 int i; 623 624 mutex_lock(&acm->mutex); 625 if (acm->disconnected) 626 goto disconnected; 627 628 retval = usb_autopm_get_interface(acm->control); 629 if (retval) 630 goto error_get_interface; 631 632 /* 633 * FIXME: Why do we need this? Allocating 64K of physically contiguous 634 * memory is really nasty... 635 */ 636 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 637 acm->control->needs_remote_wakeup = 1; 638 639 acm->ctrlurb->dev = acm->dev; 640 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 641 if (retval) { 642 dev_err(&acm->control->dev, 643 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 644 goto error_submit_urb; 645 } 646 647 acm_tty_set_termios(tty, NULL); 648 649 /* 650 * Unthrottle device in case the TTY was closed while throttled. 651 */ 652 spin_lock_irq(&acm->read_lock); 653 acm->throttled = 0; 654 acm->throttle_req = 0; 655 spin_unlock_irq(&acm->read_lock); 656 657 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 658 if (retval) 659 goto error_submit_read_urbs; 660 661 usb_autopm_put_interface(acm->control); 662 663 mutex_unlock(&acm->mutex); 664 665 return 0; 666 667 error_submit_read_urbs: 668 for (i = 0; i < acm->rx_buflimit; i++) 669 usb_kill_urb(acm->read_urbs[i]); 670 usb_kill_urb(acm->ctrlurb); 671 error_submit_urb: 672 usb_autopm_put_interface(acm->control); 673 error_get_interface: 674 disconnected: 675 mutex_unlock(&acm->mutex); 676 677 return usb_translate_errors(retval); 678 } 679 680 static void acm_port_destruct(struct tty_port *port) 681 { 682 struct acm *acm = container_of(port, struct acm, port); 683 684 acm_release_minor(acm); 685 usb_put_intf(acm->control); 686 kfree(acm->country_codes); 687 kfree(acm); 688 } 689 690 static void acm_port_shutdown(struct tty_port *port) 691 { 692 struct acm *acm = container_of(port, struct acm, port); 693 struct urb *urb; 694 struct acm_wb *wb; 695 696 /* 697 * Need to grab write_lock to prevent race with resume, but no need to 698 * hold it due to the tty-port initialised flag. 699 */ 700 spin_lock_irq(&acm->write_lock); 701 spin_unlock_irq(&acm->write_lock); 702 703 usb_autopm_get_interface_no_resume(acm->control); 704 acm->control->needs_remote_wakeup = 0; 705 usb_autopm_put_interface(acm->control); 706 707 for (;;) { 708 urb = usb_get_from_anchor(&acm->delayed); 709 if (!urb) 710 break; 711 wb = urb->context; 712 wb->use = 0; 713 usb_autopm_put_interface_async(acm->control); 714 } 715 716 acm_kill_urbs(acm); 717 } 718 719 static void acm_tty_cleanup(struct tty_struct *tty) 720 { 721 struct acm *acm = tty->driver_data; 722 723 tty_port_put(&acm->port); 724 } 725 726 static void acm_tty_hangup(struct tty_struct *tty) 727 { 728 struct acm *acm = tty->driver_data; 729 730 tty_port_hangup(&acm->port); 731 } 732 733 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 734 { 735 struct acm *acm = tty->driver_data; 736 737 tty_port_close(&acm->port, tty, filp); 738 } 739 740 static int acm_tty_write(struct tty_struct *tty, 741 const unsigned char *buf, int count) 742 { 743 struct acm *acm = tty->driver_data; 744 int stat; 745 unsigned long flags; 746 int wbn; 747 struct acm_wb *wb; 748 749 if (!count) 750 return 0; 751 752 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 753 754 spin_lock_irqsave(&acm->write_lock, flags); 755 wbn = acm_wb_alloc(acm); 756 if (wbn < 0) { 757 spin_unlock_irqrestore(&acm->write_lock, flags); 758 return 0; 759 } 760 wb = &acm->wb[wbn]; 761 762 if (!acm->dev) { 763 wb->use = 0; 764 spin_unlock_irqrestore(&acm->write_lock, flags); 765 return -ENODEV; 766 } 767 768 count = (count > acm->writesize) ? acm->writesize : count; 769 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 770 memcpy(wb->buf, buf, count); 771 wb->len = count; 772 773 stat = usb_autopm_get_interface_async(acm->control); 774 if (stat) { 775 wb->use = 0; 776 spin_unlock_irqrestore(&acm->write_lock, flags); 777 return stat; 778 } 779 780 if (acm->susp_count) { 781 if (acm->putbuffer) { 782 /* now to preserve order */ 783 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed); 784 acm->putbuffer = NULL; 785 } 786 usb_anchor_urb(wb->urb, &acm->delayed); 787 spin_unlock_irqrestore(&acm->write_lock, flags); 788 return count; 789 } else { 790 if (acm->putbuffer) { 791 /* at this point there is no good way to handle errors */ 792 acm_start_wb(acm, acm->putbuffer); 793 acm->putbuffer = NULL; 794 } 795 } 796 797 stat = acm_start_wb(acm, wb); 798 spin_unlock_irqrestore(&acm->write_lock, flags); 799 800 if (stat < 0) 801 return stat; 802 return count; 803 } 804 805 static void acm_tty_flush_chars(struct tty_struct *tty) 806 { 807 struct acm *acm = tty->driver_data; 808 struct acm_wb *cur = acm->putbuffer; 809 int err; 810 unsigned long flags; 811 812 if (!cur) /* nothing to do */ 813 return; 814 815 acm->putbuffer = NULL; 816 err = usb_autopm_get_interface_async(acm->control); 817 spin_lock_irqsave(&acm->write_lock, flags); 818 if (err < 0) { 819 cur->use = 0; 820 acm->putbuffer = cur; 821 goto out; 822 } 823 824 if (acm->susp_count) 825 usb_anchor_urb(cur->urb, &acm->delayed); 826 else 827 acm_start_wb(acm, cur); 828 out: 829 spin_unlock_irqrestore(&acm->write_lock, flags); 830 return; 831 } 832 833 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch) 834 { 835 struct acm *acm = tty->driver_data; 836 struct acm_wb *cur; 837 int wbn; 838 unsigned long flags; 839 840 overflow: 841 cur = acm->putbuffer; 842 if (!cur) { 843 spin_lock_irqsave(&acm->write_lock, flags); 844 wbn = acm_wb_alloc(acm); 845 if (wbn >= 0) { 846 cur = &acm->wb[wbn]; 847 acm->putbuffer = cur; 848 } 849 spin_unlock_irqrestore(&acm->write_lock, flags); 850 if (!cur) 851 return 0; 852 } 853 854 if (cur->len == acm->writesize) { 855 acm_tty_flush_chars(tty); 856 goto overflow; 857 } 858 859 cur->buf[cur->len++] = ch; 860 return 1; 861 } 862 863 static int acm_tty_write_room(struct tty_struct *tty) 864 { 865 struct acm *acm = tty->driver_data; 866 /* 867 * Do not let the line discipline to know that we have a reserve, 868 * or it might get too enthusiastic. 869 */ 870 return acm_wb_is_avail(acm) ? acm->writesize : 0; 871 } 872 873 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 874 { 875 struct acm *acm = tty->driver_data; 876 /* 877 * if the device was unplugged then any remaining characters fell out 878 * of the connector ;) 879 */ 880 if (acm->disconnected) 881 return 0; 882 /* 883 * This is inaccurate (overcounts), but it works. 884 */ 885 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 886 } 887 888 static void acm_tty_throttle(struct tty_struct *tty) 889 { 890 struct acm *acm = tty->driver_data; 891 892 spin_lock_irq(&acm->read_lock); 893 acm->throttle_req = 1; 894 spin_unlock_irq(&acm->read_lock); 895 } 896 897 static void acm_tty_unthrottle(struct tty_struct *tty) 898 { 899 struct acm *acm = tty->driver_data; 900 unsigned int was_throttled; 901 902 spin_lock_irq(&acm->read_lock); 903 was_throttled = acm->throttled; 904 acm->throttled = 0; 905 acm->throttle_req = 0; 906 spin_unlock_irq(&acm->read_lock); 907 908 if (was_throttled) 909 acm_submit_read_urbs(acm, GFP_KERNEL); 910 } 911 912 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 913 { 914 struct acm *acm = tty->driver_data; 915 int retval; 916 917 retval = acm_send_break(acm, state ? 0xffff : 0); 918 if (retval < 0) 919 dev_dbg(&acm->control->dev, 920 "%s - send break failed\n", __func__); 921 return retval; 922 } 923 924 static int acm_tty_tiocmget(struct tty_struct *tty) 925 { 926 struct acm *acm = tty->driver_data; 927 928 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 929 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 930 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 931 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 932 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 933 TIOCM_CTS; 934 } 935 936 static int acm_tty_tiocmset(struct tty_struct *tty, 937 unsigned int set, unsigned int clear) 938 { 939 struct acm *acm = tty->driver_data; 940 unsigned int newctrl; 941 942 newctrl = acm->ctrlout; 943 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 944 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 945 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 946 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 947 948 newctrl = (newctrl & ~clear) | set; 949 950 if (acm->ctrlout == newctrl) 951 return 0; 952 return acm_set_control(acm, acm->ctrlout = newctrl); 953 } 954 955 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 956 { 957 struct serial_struct tmp; 958 959 memset(&tmp, 0, sizeof(tmp)); 960 tmp.xmit_fifo_size = acm->writesize; 961 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 962 tmp.close_delay = acm->port.close_delay / 10; 963 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 964 ASYNC_CLOSING_WAIT_NONE : 965 acm->port.closing_wait / 10; 966 967 if (copy_to_user(info, &tmp, sizeof(tmp))) 968 return -EFAULT; 969 else 970 return 0; 971 } 972 973 static int set_serial_info(struct acm *acm, 974 struct serial_struct __user *newinfo) 975 { 976 struct serial_struct new_serial; 977 unsigned int closing_wait, close_delay; 978 int retval = 0; 979 980 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 981 return -EFAULT; 982 983 close_delay = new_serial.close_delay * 10; 984 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 985 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 986 987 mutex_lock(&acm->port.mutex); 988 989 if (!capable(CAP_SYS_ADMIN)) { 990 if ((close_delay != acm->port.close_delay) || 991 (closing_wait != acm->port.closing_wait)) 992 retval = -EPERM; 993 else 994 retval = -EOPNOTSUPP; 995 } else { 996 acm->port.close_delay = close_delay; 997 acm->port.closing_wait = closing_wait; 998 } 999 1000 mutex_unlock(&acm->port.mutex); 1001 return retval; 1002 } 1003 1004 static int wait_serial_change(struct acm *acm, unsigned long arg) 1005 { 1006 int rv = 0; 1007 DECLARE_WAITQUEUE(wait, current); 1008 struct async_icount old, new; 1009 1010 do { 1011 spin_lock_irq(&acm->read_lock); 1012 old = acm->oldcount; 1013 new = acm->iocount; 1014 acm->oldcount = new; 1015 spin_unlock_irq(&acm->read_lock); 1016 1017 if ((arg & TIOCM_DSR) && 1018 old.dsr != new.dsr) 1019 break; 1020 if ((arg & TIOCM_CD) && 1021 old.dcd != new.dcd) 1022 break; 1023 if ((arg & TIOCM_RI) && 1024 old.rng != new.rng) 1025 break; 1026 1027 add_wait_queue(&acm->wioctl, &wait); 1028 set_current_state(TASK_INTERRUPTIBLE); 1029 schedule(); 1030 remove_wait_queue(&acm->wioctl, &wait); 1031 if (acm->disconnected) { 1032 if (arg & TIOCM_CD) 1033 break; 1034 else 1035 rv = -ENODEV; 1036 } else { 1037 if (signal_pending(current)) 1038 rv = -ERESTARTSYS; 1039 } 1040 } while (!rv); 1041 1042 1043 1044 return rv; 1045 } 1046 1047 static int acm_tty_get_icount(struct tty_struct *tty, 1048 struct serial_icounter_struct *icount) 1049 { 1050 struct acm *acm = tty->driver_data; 1051 1052 icount->dsr = acm->iocount.dsr; 1053 icount->rng = acm->iocount.rng; 1054 icount->dcd = acm->iocount.dcd; 1055 icount->frame = acm->iocount.frame; 1056 icount->overrun = acm->iocount.overrun; 1057 icount->parity = acm->iocount.parity; 1058 icount->brk = acm->iocount.brk; 1059 1060 return 0; 1061 } 1062 1063 static int acm_tty_ioctl(struct tty_struct *tty, 1064 unsigned int cmd, unsigned long arg) 1065 { 1066 struct acm *acm = tty->driver_data; 1067 int rv = -ENOIOCTLCMD; 1068 1069 switch (cmd) { 1070 case TIOCGSERIAL: /* gets serial port data */ 1071 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 1072 break; 1073 case TIOCSSERIAL: 1074 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 1075 break; 1076 case TIOCMIWAIT: 1077 rv = usb_autopm_get_interface(acm->control); 1078 if (rv < 0) { 1079 rv = -EIO; 1080 break; 1081 } 1082 rv = wait_serial_change(acm, arg); 1083 usb_autopm_put_interface(acm->control); 1084 break; 1085 } 1086 1087 return rv; 1088 } 1089 1090 static void acm_tty_set_termios(struct tty_struct *tty, 1091 struct ktermios *termios_old) 1092 { 1093 struct acm *acm = tty->driver_data; 1094 struct ktermios *termios = &tty->termios; 1095 struct usb_cdc_line_coding newline; 1096 int newctrl = acm->ctrlout; 1097 1098 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1099 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1100 newline.bParityType = termios->c_cflag & PARENB ? 1101 (termios->c_cflag & PARODD ? 1 : 2) + 1102 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1103 switch (termios->c_cflag & CSIZE) { 1104 case CS5: 1105 newline.bDataBits = 5; 1106 break; 1107 case CS6: 1108 newline.bDataBits = 6; 1109 break; 1110 case CS7: 1111 newline.bDataBits = 7; 1112 break; 1113 case CS8: 1114 default: 1115 newline.bDataBits = 8; 1116 break; 1117 } 1118 /* FIXME: Needs to clear unsupported bits in the termios */ 1119 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1120 1121 if (C_BAUD(tty) == B0) { 1122 newline.dwDTERate = acm->line.dwDTERate; 1123 newctrl &= ~ACM_CTRL_DTR; 1124 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1125 newctrl |= ACM_CTRL_DTR; 1126 } 1127 1128 if (newctrl != acm->ctrlout) 1129 acm_set_control(acm, acm->ctrlout = newctrl); 1130 1131 if (memcmp(&acm->line, &newline, sizeof newline)) { 1132 memcpy(&acm->line, &newline, sizeof newline); 1133 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1134 __func__, 1135 le32_to_cpu(newline.dwDTERate), 1136 newline.bCharFormat, newline.bParityType, 1137 newline.bDataBits); 1138 acm_set_line(acm, &acm->line); 1139 } 1140 } 1141 1142 static const struct tty_port_operations acm_port_ops = { 1143 .dtr_rts = acm_port_dtr_rts, 1144 .shutdown = acm_port_shutdown, 1145 .activate = acm_port_activate, 1146 .destruct = acm_port_destruct, 1147 }; 1148 1149 /* 1150 * USB probe and disconnect routines. 1151 */ 1152 1153 /* Little helpers: write/read buffers free */ 1154 static void acm_write_buffers_free(struct acm *acm) 1155 { 1156 int i; 1157 struct acm_wb *wb; 1158 1159 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1160 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1161 } 1162 1163 static void acm_read_buffers_free(struct acm *acm) 1164 { 1165 int i; 1166 1167 for (i = 0; i < acm->rx_buflimit; i++) 1168 usb_free_coherent(acm->dev, acm->readsize, 1169 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1170 } 1171 1172 /* Little helper: write buffers allocate */ 1173 static int acm_write_buffers_alloc(struct acm *acm) 1174 { 1175 int i; 1176 struct acm_wb *wb; 1177 1178 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1179 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1180 &wb->dmah); 1181 if (!wb->buf) { 1182 while (i != 0) { 1183 --i; 1184 --wb; 1185 usb_free_coherent(acm->dev, acm->writesize, 1186 wb->buf, wb->dmah); 1187 } 1188 return -ENOMEM; 1189 } 1190 } 1191 return 0; 1192 } 1193 1194 static int acm_probe(struct usb_interface *intf, 1195 const struct usb_device_id *id) 1196 { 1197 struct usb_cdc_union_desc *union_header = NULL; 1198 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1199 unsigned char *buffer = intf->altsetting->extra; 1200 int buflen = intf->altsetting->extralen; 1201 struct usb_interface *control_interface; 1202 struct usb_interface *data_interface; 1203 struct usb_endpoint_descriptor *epctrl = NULL; 1204 struct usb_endpoint_descriptor *epread = NULL; 1205 struct usb_endpoint_descriptor *epwrite = NULL; 1206 struct usb_device *usb_dev = interface_to_usbdev(intf); 1207 struct usb_cdc_parsed_header h; 1208 struct acm *acm; 1209 int minor; 1210 int ctrlsize, readsize; 1211 u8 *buf; 1212 int call_intf_num = -1; 1213 int data_intf_num = -1; 1214 unsigned long quirks; 1215 int num_rx_buf; 1216 int i; 1217 int combined_interfaces = 0; 1218 struct device *tty_dev; 1219 int rv = -ENOMEM; 1220 int res; 1221 1222 /* normal quirks */ 1223 quirks = (unsigned long)id->driver_info; 1224 1225 if (quirks == IGNORE_DEVICE) 1226 return -ENODEV; 1227 1228 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1229 1230 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1231 1232 /* handle quirks deadly to normal probing*/ 1233 if (quirks == NO_UNION_NORMAL) { 1234 data_interface = usb_ifnum_to_if(usb_dev, 1); 1235 control_interface = usb_ifnum_to_if(usb_dev, 0); 1236 /* we would crash */ 1237 if (!data_interface || !control_interface) 1238 return -ENODEV; 1239 goto skip_normal_probe; 1240 } 1241 1242 /* normal probing*/ 1243 if (!buffer) { 1244 dev_err(&intf->dev, "Weird descriptor references\n"); 1245 return -EINVAL; 1246 } 1247 1248 if (!intf->cur_altsetting) 1249 return -EINVAL; 1250 1251 if (!buflen) { 1252 if (intf->cur_altsetting->endpoint && 1253 intf->cur_altsetting->endpoint->extralen && 1254 intf->cur_altsetting->endpoint->extra) { 1255 dev_dbg(&intf->dev, 1256 "Seeking extra descriptors on endpoint\n"); 1257 buflen = intf->cur_altsetting->endpoint->extralen; 1258 buffer = intf->cur_altsetting->endpoint->extra; 1259 } else { 1260 dev_err(&intf->dev, 1261 "Zero length descriptor references\n"); 1262 return -EINVAL; 1263 } 1264 } 1265 1266 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1267 union_header = h.usb_cdc_union_desc; 1268 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1269 if (cmgmd) 1270 call_intf_num = cmgmd->bDataInterface; 1271 1272 if (!union_header) { 1273 if (call_intf_num > 0) { 1274 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1275 /* quirks for Droids MuIn LCD */ 1276 if (quirks & NO_DATA_INTERFACE) { 1277 data_interface = usb_ifnum_to_if(usb_dev, 0); 1278 } else { 1279 data_intf_num = call_intf_num; 1280 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1281 } 1282 control_interface = intf; 1283 } else { 1284 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1285 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1286 return -ENODEV; 1287 } else { 1288 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1289 combined_interfaces = 1; 1290 control_interface = data_interface = intf; 1291 goto look_for_collapsed_interface; 1292 } 1293 } 1294 } else { 1295 data_intf_num = union_header->bSlaveInterface0; 1296 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1297 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1298 } 1299 1300 if (!control_interface || !data_interface) { 1301 dev_dbg(&intf->dev, "no interfaces\n"); 1302 return -ENODEV; 1303 } 1304 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1305 return -ENODEV; 1306 1307 if (data_intf_num != call_intf_num) 1308 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1309 1310 if (control_interface == data_interface) { 1311 /* some broken devices designed for windows work this way */ 1312 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1313 combined_interfaces = 1; 1314 /* a popular other OS doesn't use it */ 1315 quirks |= NO_CAP_LINE; 1316 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1317 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1318 return -EINVAL; 1319 } 1320 look_for_collapsed_interface: 1321 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1322 &epread, &epwrite, &epctrl, NULL); 1323 if (res) 1324 return res; 1325 1326 goto made_compressed_probe; 1327 } 1328 1329 skip_normal_probe: 1330 1331 /*workaround for switched interfaces */ 1332 if (data_interface->cur_altsetting->desc.bInterfaceClass 1333 != CDC_DATA_INTERFACE_TYPE) { 1334 if (control_interface->cur_altsetting->desc.bInterfaceClass 1335 == CDC_DATA_INTERFACE_TYPE) { 1336 dev_dbg(&intf->dev, 1337 "Your device has switched interfaces.\n"); 1338 swap(control_interface, data_interface); 1339 } else { 1340 return -EINVAL; 1341 } 1342 } 1343 1344 /* Accept probe requests only for the control interface */ 1345 if (!combined_interfaces && intf != control_interface) 1346 return -ENODEV; 1347 1348 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1349 /* valid in this context */ 1350 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1351 return -EBUSY; 1352 } 1353 1354 1355 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1356 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1357 return -EINVAL; 1358 1359 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1360 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1361 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1362 1363 1364 /* workaround for switched endpoints */ 1365 if (!usb_endpoint_dir_in(epread)) { 1366 /* descriptors are swapped */ 1367 dev_dbg(&intf->dev, 1368 "The data interface has switched endpoints\n"); 1369 swap(epread, epwrite); 1370 } 1371 made_compressed_probe: 1372 dev_dbg(&intf->dev, "interfaces are valid\n"); 1373 1374 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1375 if (acm == NULL) 1376 goto alloc_fail; 1377 1378 minor = acm_alloc_minor(acm); 1379 if (minor < 0) 1380 goto alloc_fail1; 1381 1382 ctrlsize = usb_endpoint_maxp(epctrl); 1383 readsize = usb_endpoint_maxp(epread) * 1384 (quirks == SINGLE_RX_URB ? 1 : 2); 1385 acm->combined_interfaces = combined_interfaces; 1386 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1387 acm->control = control_interface; 1388 acm->data = data_interface; 1389 acm->minor = minor; 1390 acm->dev = usb_dev; 1391 if (h.usb_cdc_acm_descriptor) 1392 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1393 if (quirks & NO_CAP_LINE) 1394 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1395 acm->ctrlsize = ctrlsize; 1396 acm->readsize = readsize; 1397 acm->rx_buflimit = num_rx_buf; 1398 INIT_WORK(&acm->work, acm_softint); 1399 init_waitqueue_head(&acm->wioctl); 1400 spin_lock_init(&acm->write_lock); 1401 spin_lock_init(&acm->read_lock); 1402 mutex_init(&acm->mutex); 1403 if (usb_endpoint_xfer_int(epread)) { 1404 acm->bInterval = epread->bInterval; 1405 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1406 } else { 1407 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1408 } 1409 if (usb_endpoint_xfer_int(epwrite)) 1410 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1411 else 1412 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1413 tty_port_init(&acm->port); 1414 acm->port.ops = &acm_port_ops; 1415 init_usb_anchor(&acm->delayed); 1416 acm->quirks = quirks; 1417 1418 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1419 if (!buf) 1420 goto alloc_fail2; 1421 acm->ctrl_buffer = buf; 1422 1423 if (acm_write_buffers_alloc(acm) < 0) 1424 goto alloc_fail4; 1425 1426 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1427 if (!acm->ctrlurb) 1428 goto alloc_fail5; 1429 1430 for (i = 0; i < num_rx_buf; i++) { 1431 struct acm_rb *rb = &(acm->read_buffers[i]); 1432 struct urb *urb; 1433 1434 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1435 &rb->dma); 1436 if (!rb->base) 1437 goto alloc_fail6; 1438 rb->index = i; 1439 rb->instance = acm; 1440 1441 urb = usb_alloc_urb(0, GFP_KERNEL); 1442 if (!urb) 1443 goto alloc_fail6; 1444 1445 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1446 urb->transfer_dma = rb->dma; 1447 if (usb_endpoint_xfer_int(epread)) 1448 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1449 acm->readsize, 1450 acm_read_bulk_callback, rb, 1451 acm->bInterval); 1452 else 1453 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1454 acm->readsize, 1455 acm_read_bulk_callback, rb); 1456 1457 acm->read_urbs[i] = urb; 1458 __set_bit(i, &acm->read_urbs_free); 1459 } 1460 for (i = 0; i < ACM_NW; i++) { 1461 struct acm_wb *snd = &(acm->wb[i]); 1462 1463 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1464 if (snd->urb == NULL) 1465 goto alloc_fail7; 1466 1467 if (usb_endpoint_xfer_int(epwrite)) 1468 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1469 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1470 else 1471 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1472 NULL, acm->writesize, acm_write_bulk, snd); 1473 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1474 if (quirks & SEND_ZERO_PACKET) 1475 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1476 snd->instance = acm; 1477 } 1478 1479 usb_set_intfdata(intf, acm); 1480 1481 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1482 if (i < 0) 1483 goto alloc_fail7; 1484 1485 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1486 struct usb_cdc_country_functional_desc * cfd = 1487 h.usb_cdc_country_functional_desc; 1488 1489 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1490 if (!acm->country_codes) 1491 goto skip_countries; 1492 acm->country_code_size = cfd->bLength - 4; 1493 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1494 cfd->bLength - 4); 1495 acm->country_rel_date = cfd->iCountryCodeRelDate; 1496 1497 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1498 if (i < 0) { 1499 kfree(acm->country_codes); 1500 acm->country_codes = NULL; 1501 acm->country_code_size = 0; 1502 goto skip_countries; 1503 } 1504 1505 i = device_create_file(&intf->dev, 1506 &dev_attr_iCountryCodeRelDate); 1507 if (i < 0) { 1508 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1509 kfree(acm->country_codes); 1510 acm->country_codes = NULL; 1511 acm->country_code_size = 0; 1512 goto skip_countries; 1513 } 1514 } 1515 1516 skip_countries: 1517 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1518 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1519 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1520 /* works around buggy devices */ 1521 epctrl->bInterval ? epctrl->bInterval : 16); 1522 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1523 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1524 acm->notification_buffer = NULL; 1525 acm->nb_index = 0; 1526 acm->nb_size = 0; 1527 1528 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1529 1530 acm->line.dwDTERate = cpu_to_le32(9600); 1531 acm->line.bDataBits = 8; 1532 acm_set_line(acm, &acm->line); 1533 1534 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1535 usb_set_intfdata(data_interface, acm); 1536 1537 usb_get_intf(control_interface); 1538 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1539 &control_interface->dev); 1540 if (IS_ERR(tty_dev)) { 1541 rv = PTR_ERR(tty_dev); 1542 goto alloc_fail8; 1543 } 1544 1545 if (quirks & CLEAR_HALT_CONDITIONS) { 1546 usb_clear_halt(usb_dev, acm->in); 1547 usb_clear_halt(usb_dev, acm->out); 1548 } 1549 1550 return 0; 1551 alloc_fail8: 1552 if (acm->country_codes) { 1553 device_remove_file(&acm->control->dev, 1554 &dev_attr_wCountryCodes); 1555 device_remove_file(&acm->control->dev, 1556 &dev_attr_iCountryCodeRelDate); 1557 kfree(acm->country_codes); 1558 } 1559 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1560 alloc_fail7: 1561 usb_set_intfdata(intf, NULL); 1562 for (i = 0; i < ACM_NW; i++) 1563 usb_free_urb(acm->wb[i].urb); 1564 alloc_fail6: 1565 for (i = 0; i < num_rx_buf; i++) 1566 usb_free_urb(acm->read_urbs[i]); 1567 acm_read_buffers_free(acm); 1568 usb_free_urb(acm->ctrlurb); 1569 alloc_fail5: 1570 acm_write_buffers_free(acm); 1571 alloc_fail4: 1572 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1573 alloc_fail2: 1574 acm_release_minor(acm); 1575 alloc_fail1: 1576 kfree(acm); 1577 alloc_fail: 1578 return rv; 1579 } 1580 1581 static void acm_disconnect(struct usb_interface *intf) 1582 { 1583 struct acm *acm = usb_get_intfdata(intf); 1584 struct tty_struct *tty; 1585 1586 /* sibling interface is already cleaning up */ 1587 if (!acm) 1588 return; 1589 1590 mutex_lock(&acm->mutex); 1591 acm->disconnected = true; 1592 if (acm->country_codes) { 1593 device_remove_file(&acm->control->dev, 1594 &dev_attr_wCountryCodes); 1595 device_remove_file(&acm->control->dev, 1596 &dev_attr_iCountryCodeRelDate); 1597 } 1598 wake_up_all(&acm->wioctl); 1599 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1600 usb_set_intfdata(acm->control, NULL); 1601 usb_set_intfdata(acm->data, NULL); 1602 mutex_unlock(&acm->mutex); 1603 1604 tty = tty_port_tty_get(&acm->port); 1605 if (tty) { 1606 tty_vhangup(tty); 1607 tty_kref_put(tty); 1608 } 1609 1610 acm_kill_urbs(acm); 1611 cancel_work_sync(&acm->work); 1612 1613 tty_unregister_device(acm_tty_driver, acm->minor); 1614 1615 acm_write_buffers_free(acm); 1616 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1617 acm_read_buffers_free(acm); 1618 1619 kfree(acm->notification_buffer); 1620 1621 if (!acm->combined_interfaces) 1622 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1623 acm->data : acm->control); 1624 1625 tty_port_put(&acm->port); 1626 } 1627 1628 #ifdef CONFIG_PM 1629 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1630 { 1631 struct acm *acm = usb_get_intfdata(intf); 1632 int cnt; 1633 1634 spin_lock_irq(&acm->write_lock); 1635 if (PMSG_IS_AUTO(message)) { 1636 if (acm->transmitting) { 1637 spin_unlock_irq(&acm->write_lock); 1638 return -EBUSY; 1639 } 1640 } 1641 cnt = acm->susp_count++; 1642 spin_unlock_irq(&acm->write_lock); 1643 1644 if (cnt) 1645 return 0; 1646 1647 acm_kill_urbs(acm); 1648 cancel_work_sync(&acm->work); 1649 1650 return 0; 1651 } 1652 1653 static int acm_resume(struct usb_interface *intf) 1654 { 1655 struct acm *acm = usb_get_intfdata(intf); 1656 struct urb *urb; 1657 int rv = 0; 1658 1659 spin_lock_irq(&acm->write_lock); 1660 1661 if (--acm->susp_count) 1662 goto out; 1663 1664 if (tty_port_initialized(&acm->port)) { 1665 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1666 1667 for (;;) { 1668 urb = usb_get_from_anchor(&acm->delayed); 1669 if (!urb) 1670 break; 1671 1672 acm_start_wb(acm, urb->context); 1673 } 1674 1675 /* 1676 * delayed error checking because we must 1677 * do the write path at all cost 1678 */ 1679 if (rv < 0) 1680 goto out; 1681 1682 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1683 } 1684 out: 1685 spin_unlock_irq(&acm->write_lock); 1686 1687 return rv; 1688 } 1689 1690 static int acm_reset_resume(struct usb_interface *intf) 1691 { 1692 struct acm *acm = usb_get_intfdata(intf); 1693 1694 if (tty_port_initialized(&acm->port)) 1695 tty_port_tty_hangup(&acm->port, false); 1696 1697 return acm_resume(intf); 1698 } 1699 1700 #endif /* CONFIG_PM */ 1701 1702 static int acm_pre_reset(struct usb_interface *intf) 1703 { 1704 struct acm *acm = usb_get_intfdata(intf); 1705 1706 clear_bit(EVENT_RX_STALL, &acm->flags); 1707 1708 return 0; 1709 } 1710 1711 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1712 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1713 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1714 USB_CDC_ACM_PROTO_VENDOR) 1715 1716 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1717 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1718 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1719 USB_CDC_ACM_PROTO_VENDOR) 1720 1721 /* 1722 * USB driver structure. 1723 */ 1724 1725 static const struct usb_device_id acm_ids[] = { 1726 /* quirky and broken devices */ 1727 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1728 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1729 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1730 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1731 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1732 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1733 }, 1734 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1735 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1736 }, 1737 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1738 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1739 }, 1740 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1741 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1742 }, 1743 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1744 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1745 }, 1746 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1747 .driver_info = SINGLE_RX_URB, 1748 }, 1749 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1750 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1751 }, 1752 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1753 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1754 }, 1755 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1756 .driver_info = SINGLE_RX_URB, 1757 }, 1758 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1759 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1760 }, 1761 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1762 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1763 }, 1764 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1765 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1766 }, 1767 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1768 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1769 }, 1770 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1771 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1772 }, 1773 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1774 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1775 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1776 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1777 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1778 }, 1779 /* Motorola H24 HSPA module: */ 1780 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1781 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1782 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1783 }, 1784 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1785 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1786 }, 1787 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1788 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1789 }, 1790 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1791 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1792 }, 1793 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1794 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1795 }, 1796 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1797 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1798 }, 1799 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1800 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1801 }, 1802 1803 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1804 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1805 data interface instead of 1806 communications interface. 1807 Maybe we should define a new 1808 quirk for this. */ 1809 }, 1810 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1811 .driver_info = NO_UNION_NORMAL, 1812 }, 1813 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1814 .driver_info = NO_UNION_NORMAL, 1815 }, 1816 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1817 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1818 }, 1819 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1820 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1821 }, 1822 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1823 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1824 }, 1825 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1826 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1827 }, 1828 1829 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1830 .driver_info = CLEAR_HALT_CONDITIONS, 1831 }, 1832 1833 /* Nokia S60 phones expose two ACM channels. The first is 1834 * a modem and is picked up by the standard AT-command 1835 * information below. The second is 'vendor-specific' but 1836 * is treated as a serial device at the S60 end, so we want 1837 * to expose it on Linux too. */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1888 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1889 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1890 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1891 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1892 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1893 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1894 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1895 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1896 1897 /* Support for Owen devices */ 1898 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1899 1900 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1901 1902 /* Support for Droids MuIn LCD */ 1903 { USB_DEVICE(0x04d8, 0x000b), 1904 .driver_info = NO_DATA_INTERFACE, 1905 }, 1906 1907 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1908 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1909 .driver_info = IGNORE_DEVICE, 1910 }, 1911 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1912 .driver_info = IGNORE_DEVICE, 1913 }, 1914 #endif 1915 1916 /*Samsung phone in firmware update mode */ 1917 { USB_DEVICE(0x04e8, 0x685d), 1918 .driver_info = IGNORE_DEVICE, 1919 }, 1920 1921 /* Exclude Infineon Flash Loader utility */ 1922 { USB_DEVICE(0x058b, 0x0041), 1923 .driver_info = IGNORE_DEVICE, 1924 }, 1925 1926 /* control interfaces without any protocol set */ 1927 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1928 USB_CDC_PROTO_NONE) }, 1929 1930 /* control interfaces with various AT-command sets */ 1931 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1932 USB_CDC_ACM_PROTO_AT_V25TER) }, 1933 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1934 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1935 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1936 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1937 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1938 USB_CDC_ACM_PROTO_AT_GSM) }, 1939 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1940 USB_CDC_ACM_PROTO_AT_3G) }, 1941 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1942 USB_CDC_ACM_PROTO_AT_CDMA) }, 1943 1944 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1945 .driver_info = SEND_ZERO_PACKET, 1946 }, 1947 1948 { } 1949 }; 1950 1951 MODULE_DEVICE_TABLE(usb, acm_ids); 1952 1953 static struct usb_driver acm_driver = { 1954 .name = "cdc_acm", 1955 .probe = acm_probe, 1956 .disconnect = acm_disconnect, 1957 #ifdef CONFIG_PM 1958 .suspend = acm_suspend, 1959 .resume = acm_resume, 1960 .reset_resume = acm_reset_resume, 1961 #endif 1962 .pre_reset = acm_pre_reset, 1963 .id_table = acm_ids, 1964 #ifdef CONFIG_PM 1965 .supports_autosuspend = 1, 1966 #endif 1967 .disable_hub_initiated_lpm = 1, 1968 }; 1969 1970 /* 1971 * TTY driver structures. 1972 */ 1973 1974 static const struct tty_operations acm_ops = { 1975 .install = acm_tty_install, 1976 .open = acm_tty_open, 1977 .close = acm_tty_close, 1978 .cleanup = acm_tty_cleanup, 1979 .hangup = acm_tty_hangup, 1980 .write = acm_tty_write, 1981 .put_char = acm_tty_put_char, 1982 .flush_chars = acm_tty_flush_chars, 1983 .write_room = acm_tty_write_room, 1984 .ioctl = acm_tty_ioctl, 1985 .throttle = acm_tty_throttle, 1986 .unthrottle = acm_tty_unthrottle, 1987 .chars_in_buffer = acm_tty_chars_in_buffer, 1988 .break_ctl = acm_tty_break_ctl, 1989 .set_termios = acm_tty_set_termios, 1990 .tiocmget = acm_tty_tiocmget, 1991 .tiocmset = acm_tty_tiocmset, 1992 .get_icount = acm_tty_get_icount, 1993 }; 1994 1995 /* 1996 * Init / exit. 1997 */ 1998 1999 static int __init acm_init(void) 2000 { 2001 int retval; 2002 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 2003 if (!acm_tty_driver) 2004 return -ENOMEM; 2005 acm_tty_driver->driver_name = "acm", 2006 acm_tty_driver->name = "ttyACM", 2007 acm_tty_driver->major = ACM_TTY_MAJOR, 2008 acm_tty_driver->minor_start = 0, 2009 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2010 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2011 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2012 acm_tty_driver->init_termios = tty_std_termios; 2013 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2014 HUPCL | CLOCAL; 2015 tty_set_operations(acm_tty_driver, &acm_ops); 2016 2017 retval = tty_register_driver(acm_tty_driver); 2018 if (retval) { 2019 put_tty_driver(acm_tty_driver); 2020 return retval; 2021 } 2022 2023 retval = usb_register(&acm_driver); 2024 if (retval) { 2025 tty_unregister_driver(acm_tty_driver); 2026 put_tty_driver(acm_tty_driver); 2027 return retval; 2028 } 2029 2030 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2031 2032 return 0; 2033 } 2034 2035 static void __exit acm_exit(void) 2036 { 2037 usb_deregister(&acm_driver); 2038 tty_unregister_driver(acm_tty_driver); 2039 put_tty_driver(acm_tty_driver); 2040 idr_destroy(&acm_minors); 2041 } 2042 2043 module_init(acm_init); 2044 module_exit(acm_exit); 2045 2046 MODULE_AUTHOR(DRIVER_AUTHOR); 2047 MODULE_DESCRIPTION(DRIVER_DESC); 2048 MODULE_LICENSE("GPL"); 2049 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2050