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/tty_ldisc.h> 32 #include <linux/module.h> 33 #include <linux/mutex.h> 34 #include <linux/uaccess.h> 35 #include <linux/usb.h> 36 #include <linux/usb/cdc.h> 37 #include <asm/byteorder.h> 38 #include <linux/unaligned.h> 39 #include <linux/idr.h> 40 #include <linux/list.h> 41 42 #include "cdc-acm.h" 43 44 45 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 46 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 47 48 static struct usb_driver acm_driver; 49 static struct tty_driver *acm_tty_driver; 50 51 static DEFINE_IDR(acm_minors); 52 static DEFINE_MUTEX(acm_minors_lock); 53 54 static void acm_tty_set_termios(struct tty_struct *tty, 55 const struct ktermios *termios_old); 56 57 /* 58 * acm_minors accessors 59 */ 60 61 /* 62 * Look up an ACM structure by minor. If found and not disconnected, increment 63 * its refcount and return it with its mutex held. 64 */ 65 static struct acm *acm_get_by_minor(unsigned int minor) 66 { 67 struct acm *acm; 68 69 mutex_lock(&acm_minors_lock); 70 acm = idr_find(&acm_minors, minor); 71 if (acm) { 72 mutex_lock(&acm->mutex); 73 if (acm->disconnected) { 74 mutex_unlock(&acm->mutex); 75 acm = NULL; 76 } else { 77 tty_port_get(&acm->port); 78 mutex_unlock(&acm->mutex); 79 } 80 } 81 mutex_unlock(&acm_minors_lock); 82 return acm; 83 } 84 85 /* 86 * Try to find an available minor number and if found, associate it with 'acm'. 87 */ 88 static int acm_alloc_minor(struct acm *acm) 89 { 90 int minor; 91 92 mutex_lock(&acm_minors_lock); 93 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 94 mutex_unlock(&acm_minors_lock); 95 96 return minor; 97 } 98 99 /* Release the minor number associated with 'acm'. */ 100 static void acm_release_minor(struct acm *acm) 101 { 102 mutex_lock(&acm_minors_lock); 103 idr_remove(&acm_minors, acm->minor); 104 mutex_unlock(&acm_minors_lock); 105 } 106 107 /* 108 * Functions for ACM control messages. 109 */ 110 111 static int acm_ctrl_msg(struct acm *acm, int request, int value, 112 void *buf, int len) 113 { 114 int retval; 115 116 retval = usb_autopm_get_interface(acm->control); 117 if (retval) 118 return retval; 119 120 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 121 request, USB_RT_ACM, value, 122 acm->control->altsetting[0].desc.bInterfaceNumber, 123 buf, len, USB_CTRL_SET_TIMEOUT); 124 125 dev_dbg(&acm->control->dev, 126 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 127 __func__, request, value, len, retval); 128 129 usb_autopm_put_interface(acm->control); 130 131 return retval < 0 ? retval : 0; 132 } 133 134 /* devices aren't required to support these requests. 135 * the cdc acm descriptor tells whether they do... 136 */ 137 static inline int acm_set_control(struct acm *acm, int control) 138 { 139 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 140 return -EOPNOTSUPP; 141 142 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 143 control, NULL, 0); 144 } 145 146 #define acm_set_line(acm, line) \ 147 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 148 #define acm_send_break(acm, ms) \ 149 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 150 151 static void acm_poison_urbs(struct acm *acm) 152 { 153 int i; 154 155 usb_poison_urb(acm->ctrlurb); 156 for (i = 0; i < ACM_NW; i++) 157 usb_poison_urb(acm->wb[i].urb); 158 for (i = 0; i < acm->rx_buflimit; i++) 159 usb_poison_urb(acm->read_urbs[i]); 160 } 161 162 static void acm_unpoison_urbs(struct acm *acm) 163 { 164 int i; 165 166 for (i = 0; i < acm->rx_buflimit; i++) 167 usb_unpoison_urb(acm->read_urbs[i]); 168 for (i = 0; i < ACM_NW; i++) 169 usb_unpoison_urb(acm->wb[i].urb); 170 usb_unpoison_urb(acm->ctrlurb); 171 } 172 173 174 /* 175 * Write buffer management. 176 * All of these assume proper locks taken by the caller. 177 */ 178 179 static int acm_wb_alloc(struct acm *acm) 180 { 181 int i, wbn; 182 struct acm_wb *wb; 183 184 wbn = 0; 185 i = 0; 186 for (;;) { 187 wb = &acm->wb[wbn]; 188 if (!wb->use) { 189 wb->use = true; 190 wb->len = 0; 191 return wbn; 192 } 193 wbn = (wbn + 1) % ACM_NW; 194 if (++i >= ACM_NW) 195 return -1; 196 } 197 } 198 199 static int acm_wb_is_avail(struct acm *acm) 200 { 201 int i, n; 202 unsigned long flags; 203 204 n = ACM_NW; 205 spin_lock_irqsave(&acm->write_lock, flags); 206 for (i = 0; i < ACM_NW; i++) 207 if(acm->wb[i].use) 208 n--; 209 spin_unlock_irqrestore(&acm->write_lock, flags); 210 return n; 211 } 212 213 /* 214 * Finish write. Caller must hold acm->write_lock 215 */ 216 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 217 { 218 wb->use = false; 219 acm->transmitting--; 220 usb_autopm_put_interface_async(acm->control); 221 } 222 223 /* 224 * Poke write. 225 * 226 * the caller is responsible for locking 227 */ 228 229 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 230 { 231 int rc; 232 233 acm->transmitting++; 234 235 wb->urb->transfer_buffer = wb->buf; 236 wb->urb->transfer_dma = wb->dmah; 237 wb->urb->transfer_buffer_length = wb->len; 238 wb->urb->dev = acm->dev; 239 240 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 241 if (rc < 0) { 242 if (rc != -EPERM) 243 dev_err(&acm->data->dev, 244 "%s - usb_submit_urb(write bulk) failed: %d\n", 245 __func__, rc); 246 acm_write_done(acm, wb); 247 } 248 return rc; 249 } 250 251 /* 252 * attributes exported through sysfs 253 */ 254 static ssize_t bmCapabilities_show 255 (struct device *dev, struct device_attribute *attr, char *buf) 256 { 257 struct usb_interface *intf = to_usb_interface(dev); 258 struct acm *acm = usb_get_intfdata(intf); 259 260 return sprintf(buf, "%d", acm->ctrl_caps); 261 } 262 static DEVICE_ATTR_RO(bmCapabilities); 263 264 static ssize_t wCountryCodes_show 265 (struct device *dev, struct device_attribute *attr, char *buf) 266 { 267 struct usb_interface *intf = to_usb_interface(dev); 268 struct acm *acm = usb_get_intfdata(intf); 269 270 memcpy(buf, acm->country_codes, acm->country_code_size); 271 return acm->country_code_size; 272 } 273 274 static DEVICE_ATTR_RO(wCountryCodes); 275 276 static ssize_t iCountryCodeRelDate_show 277 (struct device *dev, struct device_attribute *attr, char *buf) 278 { 279 struct usb_interface *intf = to_usb_interface(dev); 280 struct acm *acm = usb_get_intfdata(intf); 281 282 return sprintf(buf, "%d", acm->country_rel_date); 283 } 284 285 static DEVICE_ATTR_RO(iCountryCodeRelDate); 286 /* 287 * Interrupt handlers for various ACM device responses 288 */ 289 290 static void acm_process_notification(struct acm *acm, unsigned char *buf) 291 { 292 int newctrl; 293 int difference; 294 unsigned long flags; 295 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 296 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 297 298 switch (dr->bNotificationType) { 299 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 300 dev_dbg(&acm->control->dev, 301 "%s - network connection: %d\n", __func__, dr->wValue); 302 break; 303 304 case USB_CDC_NOTIFY_SERIAL_STATE: 305 if (le16_to_cpu(dr->wLength) != 2) { 306 dev_dbg(&acm->control->dev, 307 "%s - malformed serial state\n", __func__); 308 break; 309 } 310 311 newctrl = get_unaligned_le16(data); 312 dev_dbg(&acm->control->dev, 313 "%s - serial state: 0x%x\n", __func__, newctrl); 314 315 if (!acm->clocal && (acm->ctrlin & ~newctrl & USB_CDC_SERIAL_STATE_DCD)) { 316 dev_dbg(&acm->control->dev, 317 "%s - calling hangup\n", __func__); 318 tty_port_tty_hangup(&acm->port, false); 319 } 320 321 difference = acm->ctrlin ^ newctrl; 322 323 if ((difference & USB_CDC_SERIAL_STATE_DCD) && acm->port.tty) { 324 struct tty_ldisc *ld = tty_ldisc_ref(acm->port.tty); 325 if (ld) { 326 if (ld->ops->dcd_change) 327 ld->ops->dcd_change(acm->port.tty, newctrl & USB_CDC_SERIAL_STATE_DCD); 328 tty_ldisc_deref(ld); 329 } 330 } 331 332 spin_lock_irqsave(&acm->read_lock, flags); 333 acm->ctrlin = newctrl; 334 acm->oldcount = acm->iocount; 335 336 if (difference & USB_CDC_SERIAL_STATE_DSR) 337 acm->iocount.dsr++; 338 if (difference & USB_CDC_SERIAL_STATE_DCD) 339 acm->iocount.dcd++; 340 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) { 341 acm->iocount.brk++; 342 tty_insert_flip_char(&acm->port, 0, TTY_BREAK); 343 } 344 if (newctrl & USB_CDC_SERIAL_STATE_RING_SIGNAL) 345 acm->iocount.rng++; 346 if (newctrl & USB_CDC_SERIAL_STATE_FRAMING) 347 acm->iocount.frame++; 348 if (newctrl & USB_CDC_SERIAL_STATE_PARITY) 349 acm->iocount.parity++; 350 if (newctrl & USB_CDC_SERIAL_STATE_OVERRUN) 351 acm->iocount.overrun++; 352 spin_unlock_irqrestore(&acm->read_lock, flags); 353 354 if (newctrl & USB_CDC_SERIAL_STATE_BREAK) 355 tty_flip_buffer_push(&acm->port); 356 357 if (difference) 358 wake_up_all(&acm->wioctl); 359 360 break; 361 362 default: 363 dev_dbg(&acm->control->dev, 364 "%s - unknown notification %d received: index %d len %d\n", 365 __func__, 366 dr->bNotificationType, dr->wIndex, dr->wLength); 367 } 368 } 369 370 /* control interface reports status changes with "interrupt" transfers */ 371 static void acm_ctrl_irq(struct urb *urb) 372 { 373 struct acm *acm = urb->context; 374 struct usb_cdc_notification *dr; 375 unsigned int current_size = urb->actual_length; 376 unsigned int expected_size, copy_size, alloc_size; 377 int retval; 378 int status = urb->status; 379 380 switch (status) { 381 case 0: 382 /* success */ 383 break; 384 case -ECONNRESET: 385 case -ENOENT: 386 case -ESHUTDOWN: 387 /* this urb is terminated, clean up */ 388 dev_dbg(&acm->control->dev, 389 "%s - urb shutting down with status: %d\n", 390 __func__, status); 391 return; 392 default: 393 dev_dbg(&acm->control->dev, 394 "%s - nonzero urb status received: %d\n", 395 __func__, status); 396 goto exit; 397 } 398 399 usb_mark_last_busy(acm->dev); 400 401 if (acm->nb_index == 0) { 402 /* 403 * The first chunk of a message must contain at least the 404 * notification header with the length field, otherwise we 405 * can't get an expected_size. 406 */ 407 if (current_size < sizeof(struct usb_cdc_notification)) { 408 dev_dbg(&acm->control->dev, "urb too short\n"); 409 goto exit; 410 } 411 dr = urb->transfer_buffer; 412 } else { 413 dr = (struct usb_cdc_notification *)acm->notification_buffer; 414 } 415 /* size = notification-header + (optional) data */ 416 expected_size = sizeof(struct usb_cdc_notification) + 417 le16_to_cpu(dr->wLength); 418 419 if (acm->nb_index != 0 || current_size < expected_size) { 420 /* notification is transmitted fragmented, reassemble */ 421 if (acm->nb_size < expected_size) { 422 u8 *new_buffer; 423 alloc_size = roundup_pow_of_two(expected_size); 424 /* Final freeing is done on disconnect. */ 425 new_buffer = krealloc(acm->notification_buffer, 426 alloc_size, GFP_ATOMIC); 427 if (!new_buffer) { 428 acm->nb_index = 0; 429 goto exit; 430 } 431 432 acm->notification_buffer = new_buffer; 433 acm->nb_size = alloc_size; 434 dr = (struct usb_cdc_notification *)acm->notification_buffer; 435 } 436 437 copy_size = min(current_size, 438 expected_size - acm->nb_index); 439 440 memcpy(&acm->notification_buffer[acm->nb_index], 441 urb->transfer_buffer, copy_size); 442 acm->nb_index += copy_size; 443 current_size = acm->nb_index; 444 } 445 446 if (current_size >= expected_size) { 447 /* notification complete */ 448 acm_process_notification(acm, (unsigned char *)dr); 449 acm->nb_index = 0; 450 } 451 452 exit: 453 retval = usb_submit_urb(urb, GFP_ATOMIC); 454 if (retval && retval != -EPERM && retval != -ENODEV) 455 dev_err(&acm->control->dev, 456 "%s - usb_submit_urb failed: %d\n", __func__, retval); 457 else 458 dev_vdbg(&acm->control->dev, 459 "control resubmission terminated %d\n", retval); 460 } 461 462 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 463 { 464 int res; 465 466 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 467 return 0; 468 469 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 470 if (res) { 471 if (res != -EPERM && res != -ENODEV) { 472 dev_err(&acm->data->dev, 473 "urb %d failed submission with %d\n", 474 index, res); 475 } else { 476 dev_vdbg(&acm->data->dev, "intended failure %d\n", res); 477 } 478 set_bit(index, &acm->read_urbs_free); 479 return res; 480 } else { 481 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 482 } 483 484 return 0; 485 } 486 487 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 488 { 489 int res; 490 int i; 491 492 for (i = 0; i < acm->rx_buflimit; ++i) { 493 res = acm_submit_read_urb(acm, i, mem_flags); 494 if (res) 495 return res; 496 } 497 498 return 0; 499 } 500 501 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 502 { 503 unsigned long flags; 504 505 if (!urb->actual_length) 506 return; 507 508 spin_lock_irqsave(&acm->read_lock, flags); 509 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 510 urb->actual_length); 511 spin_unlock_irqrestore(&acm->read_lock, flags); 512 513 tty_flip_buffer_push(&acm->port); 514 } 515 516 static void acm_read_bulk_callback(struct urb *urb) 517 { 518 struct acm_rb *rb = urb->context; 519 struct acm *acm = rb->instance; 520 int status = urb->status; 521 bool stopped = false; 522 bool stalled = false; 523 bool cooldown = false; 524 525 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 526 rb->index, urb->actual_length, status); 527 528 switch (status) { 529 case 0: 530 usb_mark_last_busy(acm->dev); 531 acm_process_read_urb(acm, urb); 532 break; 533 case -EPIPE: 534 set_bit(EVENT_RX_STALL, &acm->flags); 535 stalled = true; 536 break; 537 case -ENOENT: 538 case -ECONNRESET: 539 case -ESHUTDOWN: 540 dev_dbg(&acm->data->dev, 541 "%s - urb shutting down with status: %d\n", 542 __func__, status); 543 stopped = true; 544 break; 545 case -EOVERFLOW: 546 case -EPROTO: 547 dev_dbg(&acm->data->dev, 548 "%s - cooling babbling device\n", __func__); 549 usb_mark_last_busy(acm->dev); 550 set_bit(rb->index, &acm->urbs_in_error_delay); 551 set_bit(ACM_ERROR_DELAY, &acm->flags); 552 cooldown = true; 553 break; 554 default: 555 dev_dbg(&acm->data->dev, 556 "%s - nonzero urb status received: %d\n", 557 __func__, status); 558 break; 559 } 560 561 /* 562 * Make sure URB processing is done before marking as free to avoid 563 * racing with unthrottle() on another CPU. Matches the barriers 564 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 565 */ 566 smp_mb__before_atomic(); 567 set_bit(rb->index, &acm->read_urbs_free); 568 /* 569 * Make sure URB is marked as free before checking the throttled flag 570 * to avoid racing with unthrottle() on another CPU. Matches the 571 * smp_mb() in unthrottle(). 572 */ 573 smp_mb__after_atomic(); 574 575 if (stopped || stalled || cooldown) { 576 if (stalled) 577 schedule_delayed_work(&acm->dwork, 0); 578 else if (cooldown) 579 schedule_delayed_work(&acm->dwork, HZ / 2); 580 return; 581 } 582 583 if (test_bit(ACM_THROTTLED, &acm->flags)) 584 return; 585 586 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 587 } 588 589 /* data interface wrote those outgoing bytes */ 590 static void acm_write_bulk(struct urb *urb) 591 { 592 struct acm_wb *wb = urb->context; 593 struct acm *acm = wb->instance; 594 unsigned long flags; 595 int status = urb->status; 596 597 if (status || (urb->actual_length != urb->transfer_buffer_length)) 598 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 599 urb->actual_length, 600 urb->transfer_buffer_length, 601 status); 602 603 spin_lock_irqsave(&acm->write_lock, flags); 604 acm_write_done(acm, wb); 605 spin_unlock_irqrestore(&acm->write_lock, flags); 606 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 607 schedule_delayed_work(&acm->dwork, 0); 608 } 609 610 static void acm_softint(struct work_struct *work) 611 { 612 int i; 613 struct acm *acm = container_of(work, struct acm, dwork.work); 614 615 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 616 smp_mb(); /* against acm_suspend() */ 617 if (!acm->susp_count) { 618 for (i = 0; i < acm->rx_buflimit; i++) 619 usb_kill_urb(acm->read_urbs[i]); 620 usb_clear_halt(acm->dev, acm->in); 621 acm_submit_read_urbs(acm, GFP_KERNEL); 622 clear_bit(EVENT_RX_STALL, &acm->flags); 623 } 624 } 625 626 if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { 627 for (i = 0; i < acm->rx_buflimit; i++) 628 if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) 629 acm_submit_read_urb(acm, i, GFP_KERNEL); 630 } 631 632 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 633 tty_port_tty_wakeup(&acm->port); 634 } 635 636 /* 637 * TTY handlers 638 */ 639 640 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 641 { 642 struct acm *acm; 643 int retval; 644 645 acm = acm_get_by_minor(tty->index); 646 if (!acm) 647 return -ENODEV; 648 649 retval = tty_standard_install(driver, tty); 650 if (retval) 651 goto error_init_termios; 652 653 /* 654 * Suppress initial echoing for some devices which might send data 655 * immediately after acm driver has been installed. 656 */ 657 if (acm->quirks & DISABLE_ECHO) 658 tty->termios.c_lflag &= ~ECHO; 659 660 tty->driver_data = acm; 661 662 return 0; 663 664 error_init_termios: 665 tty_port_put(&acm->port); 666 return retval; 667 } 668 669 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 670 { 671 struct acm *acm = tty->driver_data; 672 673 return tty_port_open(&acm->port, tty, filp); 674 } 675 676 static void acm_port_dtr_rts(struct tty_port *port, bool active) 677 { 678 struct acm *acm = container_of(port, struct acm, port); 679 int val; 680 int res; 681 682 if (active) 683 val = USB_CDC_CTRL_DTR | USB_CDC_CTRL_RTS; 684 else 685 val = 0; 686 687 /* FIXME: add missing ctrlout locking throughout driver */ 688 acm->ctrlout = val; 689 690 res = acm_set_control(acm, val); 691 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 692 /* This is broken in too many devices to spam the logs */ 693 dev_dbg(&acm->control->dev, "failed to set dtr/rts\n"); 694 } 695 696 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 697 { 698 struct acm *acm = container_of(port, struct acm, port); 699 int retval = -ENODEV; 700 int i; 701 702 mutex_lock(&acm->mutex); 703 if (acm->disconnected) 704 goto disconnected; 705 706 retval = usb_autopm_get_interface(acm->control); 707 if (retval) 708 goto error_get_interface; 709 710 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 711 acm->control->needs_remote_wakeup = 1; 712 713 acm->ctrlurb->dev = acm->dev; 714 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 715 if (retval) { 716 dev_err(&acm->control->dev, 717 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 718 goto error_submit_urb; 719 } 720 721 acm_tty_set_termios(tty, NULL); 722 723 /* 724 * Unthrottle device in case the TTY was closed while throttled. 725 */ 726 clear_bit(ACM_THROTTLED, &acm->flags); 727 728 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 729 if (retval) 730 goto error_submit_read_urbs; 731 732 usb_autopm_put_interface(acm->control); 733 734 mutex_unlock(&acm->mutex); 735 736 return 0; 737 738 error_submit_read_urbs: 739 for (i = 0; i < acm->rx_buflimit; i++) 740 usb_kill_urb(acm->read_urbs[i]); 741 usb_kill_urb(acm->ctrlurb); 742 error_submit_urb: 743 usb_autopm_put_interface(acm->control); 744 error_get_interface: 745 disconnected: 746 mutex_unlock(&acm->mutex); 747 748 return usb_translate_errors(retval); 749 } 750 751 static void acm_port_destruct(struct tty_port *port) 752 { 753 struct acm *acm = container_of(port, struct acm, port); 754 755 if (acm->minor != ACM_MINOR_INVALID) 756 acm_release_minor(acm); 757 usb_put_intf(acm->control); 758 kfree(acm->country_codes); 759 kfree(acm); 760 } 761 762 static void acm_port_shutdown(struct tty_port *port) 763 { 764 struct acm *acm = container_of(port, struct acm, port); 765 struct urb *urb; 766 struct acm_wb *wb; 767 768 /* 769 * Need to grab write_lock to prevent race with resume, but no need to 770 * hold it due to the tty-port initialised flag. 771 */ 772 acm_poison_urbs(acm); 773 spin_lock_irq(&acm->write_lock); 774 spin_unlock_irq(&acm->write_lock); 775 776 usb_autopm_get_interface_no_resume(acm->control); 777 acm->control->needs_remote_wakeup = 0; 778 usb_autopm_put_interface(acm->control); 779 780 for (;;) { 781 urb = usb_get_from_anchor(&acm->delayed); 782 if (!urb) 783 break; 784 wb = urb->context; 785 wb->use = false; 786 usb_autopm_put_interface_async(acm->control); 787 } 788 789 acm_unpoison_urbs(acm); 790 791 } 792 793 static void acm_tty_cleanup(struct tty_struct *tty) 794 { 795 struct acm *acm = tty->driver_data; 796 797 tty_port_put(&acm->port); 798 } 799 800 static void acm_tty_hangup(struct tty_struct *tty) 801 { 802 struct acm *acm = tty->driver_data; 803 804 tty_port_hangup(&acm->port); 805 } 806 807 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 808 { 809 struct acm *acm = tty->driver_data; 810 811 tty_port_close(&acm->port, tty, filp); 812 } 813 814 static ssize_t acm_tty_write(struct tty_struct *tty, const u8 *buf, 815 size_t count) 816 { 817 struct acm *acm = tty->driver_data; 818 int stat; 819 unsigned long flags; 820 int wbn; 821 struct acm_wb *wb; 822 823 if (!count) 824 return 0; 825 826 dev_vdbg(&acm->data->dev, "%zu bytes from tty layer\n", count); 827 828 spin_lock_irqsave(&acm->write_lock, flags); 829 wbn = acm_wb_alloc(acm); 830 if (wbn < 0) { 831 spin_unlock_irqrestore(&acm->write_lock, flags); 832 return 0; 833 } 834 wb = &acm->wb[wbn]; 835 836 if (!acm->dev) { 837 wb->use = false; 838 spin_unlock_irqrestore(&acm->write_lock, flags); 839 return -ENODEV; 840 } 841 842 count = (count > acm->writesize) ? acm->writesize : count; 843 dev_vdbg(&acm->data->dev, "writing %zu bytes\n", count); 844 memcpy(wb->buf, buf, count); 845 wb->len = count; 846 847 stat = usb_autopm_get_interface_async(acm->control); 848 if (stat) { 849 wb->use = false; 850 spin_unlock_irqrestore(&acm->write_lock, flags); 851 return stat; 852 } 853 854 if (acm->susp_count) { 855 usb_anchor_urb(wb->urb, &acm->delayed); 856 spin_unlock_irqrestore(&acm->write_lock, flags); 857 return count; 858 } 859 860 stat = acm_start_wb(acm, wb); 861 spin_unlock_irqrestore(&acm->write_lock, flags); 862 863 if (stat < 0) 864 return stat; 865 return count; 866 } 867 868 static unsigned int acm_tty_write_room(struct tty_struct *tty) 869 { 870 struct acm *acm = tty->driver_data; 871 /* 872 * Do not let the line discipline to know that we have a reserve, 873 * or it might get too enthusiastic. 874 */ 875 return acm_wb_is_avail(acm) ? acm->writesize : 0; 876 } 877 878 static void acm_tty_flush_buffer(struct tty_struct *tty) 879 { 880 struct acm *acm = tty->driver_data; 881 unsigned long flags; 882 int i; 883 884 spin_lock_irqsave(&acm->write_lock, flags); 885 for (i = 0; i < ACM_NW; i++) 886 if (acm->wb[i].use) 887 usb_unlink_urb(acm->wb[i].urb); 888 spin_unlock_irqrestore(&acm->write_lock, flags); 889 } 890 891 static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty) 892 { 893 struct acm *acm = tty->driver_data; 894 /* 895 * if the device was unplugged then any remaining characters fell out 896 * of the connector ;) 897 */ 898 if (acm->disconnected) 899 return 0; 900 /* 901 * This is inaccurate (overcounts), but it works. 902 */ 903 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 904 } 905 906 static void acm_tty_throttle(struct tty_struct *tty) 907 { 908 struct acm *acm = tty->driver_data; 909 910 set_bit(ACM_THROTTLED, &acm->flags); 911 } 912 913 static void acm_tty_unthrottle(struct tty_struct *tty) 914 { 915 struct acm *acm = tty->driver_data; 916 917 clear_bit(ACM_THROTTLED, &acm->flags); 918 919 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 920 smp_mb(); 921 922 acm_submit_read_urbs(acm, GFP_KERNEL); 923 } 924 925 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 926 { 927 struct acm *acm = tty->driver_data; 928 int retval; 929 930 if (!(acm->ctrl_caps & USB_CDC_CAP_BRK)) 931 return -EOPNOTSUPP; 932 933 retval = acm_send_break(acm, state ? 0xffff : 0); 934 if (retval < 0) 935 dev_dbg(&acm->control->dev, 936 "%s - send break failed\n", __func__); 937 return retval; 938 } 939 940 static int acm_tty_tiocmget(struct tty_struct *tty) 941 { 942 struct acm *acm = tty->driver_data; 943 944 return (acm->ctrlout & USB_CDC_CTRL_DTR ? TIOCM_DTR : 0) | 945 (acm->ctrlout & USB_CDC_CTRL_RTS ? TIOCM_RTS : 0) | 946 (acm->ctrlin & USB_CDC_SERIAL_STATE_DSR ? TIOCM_DSR : 0) | 947 (acm->ctrlin & USB_CDC_SERIAL_STATE_RING_SIGNAL ? TIOCM_RI : 0) | 948 (acm->ctrlin & USB_CDC_SERIAL_STATE_DCD ? TIOCM_CD : 0) | 949 TIOCM_CTS; 950 } 951 952 static int acm_tty_tiocmset(struct tty_struct *tty, 953 unsigned int set, unsigned int clear) 954 { 955 struct acm *acm = tty->driver_data; 956 unsigned int newctrl; 957 958 newctrl = acm->ctrlout; 959 set = (set & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 960 (set & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 961 clear = (clear & TIOCM_DTR ? USB_CDC_CTRL_DTR : 0) | 962 (clear & TIOCM_RTS ? USB_CDC_CTRL_RTS : 0); 963 964 newctrl = (newctrl & ~clear) | set; 965 966 if (acm->ctrlout == newctrl) 967 return 0; 968 return acm_set_control(acm, acm->ctrlout = newctrl); 969 } 970 971 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 972 { 973 struct acm *acm = tty->driver_data; 974 975 ss->line = acm->minor; 976 mutex_lock(&acm->port.mutex); 977 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 978 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 979 ASYNC_CLOSING_WAIT_NONE : 980 jiffies_to_msecs(acm->port.closing_wait) / 10; 981 mutex_unlock(&acm->port.mutex); 982 return 0; 983 } 984 985 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 986 { 987 struct acm *acm = tty->driver_data; 988 unsigned int closing_wait, close_delay; 989 int retval = 0; 990 991 close_delay = msecs_to_jiffies(ss->close_delay * 10); 992 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 993 ASYNC_CLOSING_WAIT_NONE : 994 msecs_to_jiffies(ss->closing_wait * 10); 995 996 mutex_lock(&acm->port.mutex); 997 998 if (!capable(CAP_SYS_ADMIN)) { 999 if ((close_delay != acm->port.close_delay) || 1000 (closing_wait != acm->port.closing_wait)) 1001 retval = -EPERM; 1002 } else { 1003 acm->port.close_delay = close_delay; 1004 acm->port.closing_wait = closing_wait; 1005 } 1006 1007 mutex_unlock(&acm->port.mutex); 1008 return retval; 1009 } 1010 1011 static int wait_serial_change(struct acm *acm, unsigned long arg) 1012 { 1013 int rv = 0; 1014 DECLARE_WAITQUEUE(wait, current); 1015 struct async_icount old, new; 1016 1017 do { 1018 spin_lock_irq(&acm->read_lock); 1019 old = acm->oldcount; 1020 new = acm->iocount; 1021 acm->oldcount = new; 1022 spin_unlock_irq(&acm->read_lock); 1023 1024 if ((arg & TIOCM_DSR) && 1025 old.dsr != new.dsr) 1026 break; 1027 if ((arg & TIOCM_CD) && 1028 old.dcd != new.dcd) 1029 break; 1030 if ((arg & TIOCM_RI) && 1031 old.rng != new.rng) 1032 break; 1033 1034 add_wait_queue(&acm->wioctl, &wait); 1035 set_current_state(TASK_INTERRUPTIBLE); 1036 schedule(); 1037 remove_wait_queue(&acm->wioctl, &wait); 1038 if (acm->disconnected) { 1039 if (arg & TIOCM_CD) 1040 break; 1041 else 1042 rv = -ENODEV; 1043 } else { 1044 if (signal_pending(current)) 1045 rv = -ERESTARTSYS; 1046 } 1047 } while (!rv); 1048 1049 1050 1051 return rv; 1052 } 1053 1054 static int acm_tty_get_icount(struct tty_struct *tty, 1055 struct serial_icounter_struct *icount) 1056 { 1057 struct acm *acm = tty->driver_data; 1058 1059 icount->dsr = acm->iocount.dsr; 1060 icount->rng = acm->iocount.rng; 1061 icount->dcd = acm->iocount.dcd; 1062 icount->frame = acm->iocount.frame; 1063 icount->overrun = acm->iocount.overrun; 1064 icount->parity = acm->iocount.parity; 1065 icount->brk = acm->iocount.brk; 1066 1067 return 0; 1068 } 1069 1070 static int acm_tty_ioctl(struct tty_struct *tty, 1071 unsigned int cmd, unsigned long arg) 1072 { 1073 struct acm *acm = tty->driver_data; 1074 int rv = -ENOIOCTLCMD; 1075 1076 switch (cmd) { 1077 case TIOCMIWAIT: 1078 rv = usb_autopm_get_interface(acm->control); 1079 if (rv < 0) { 1080 rv = -EIO; 1081 break; 1082 } 1083 rv = wait_serial_change(acm, arg); 1084 usb_autopm_put_interface(acm->control); 1085 break; 1086 } 1087 1088 return rv; 1089 } 1090 1091 static void acm_tty_set_termios(struct tty_struct *tty, 1092 const struct ktermios *termios_old) 1093 { 1094 struct acm *acm = tty->driver_data; 1095 struct ktermios *termios = &tty->termios; 1096 struct usb_cdc_line_coding newline; 1097 int newctrl = acm->ctrlout; 1098 1099 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1100 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1101 newline.bParityType = termios->c_cflag & PARENB ? 1102 (termios->c_cflag & PARODD ? 1 : 2) + 1103 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1104 newline.bDataBits = tty_get_char_size(termios->c_cflag); 1105 1106 /* FIXME: Needs to clear unsupported bits in the termios */ 1107 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1108 1109 if (C_BAUD(tty) == B0) { 1110 newline.dwDTERate = acm->line.dwDTERate; 1111 newctrl &= ~USB_CDC_CTRL_DTR; 1112 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1113 newctrl |= USB_CDC_CTRL_DTR; 1114 } 1115 1116 if (newctrl != acm->ctrlout) 1117 acm_set_control(acm, acm->ctrlout = newctrl); 1118 1119 if (memcmp(&acm->line, &newline, sizeof newline)) { 1120 memcpy(&acm->line, &newline, sizeof newline); 1121 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1122 __func__, 1123 le32_to_cpu(newline.dwDTERate), 1124 newline.bCharFormat, newline.bParityType, 1125 newline.bDataBits); 1126 acm_set_line(acm, &acm->line); 1127 } 1128 } 1129 1130 static const struct tty_port_operations acm_port_ops = { 1131 .dtr_rts = acm_port_dtr_rts, 1132 .shutdown = acm_port_shutdown, 1133 .activate = acm_port_activate, 1134 .destruct = acm_port_destruct, 1135 }; 1136 1137 /* 1138 * USB probe and disconnect routines. 1139 */ 1140 1141 /* Little helpers: write/read buffers free */ 1142 static void acm_write_buffers_free(struct acm *acm) 1143 { 1144 int i; 1145 struct acm_wb *wb; 1146 1147 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1148 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1149 } 1150 1151 static void acm_read_buffers_free(struct acm *acm) 1152 { 1153 int i; 1154 1155 for (i = 0; i < acm->rx_buflimit; i++) 1156 usb_free_coherent(acm->dev, acm->readsize, 1157 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1158 } 1159 1160 /* Little helper: write buffers allocate */ 1161 static int acm_write_buffers_alloc(struct acm *acm) 1162 { 1163 int i; 1164 struct acm_wb *wb; 1165 1166 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1167 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1168 &wb->dmah); 1169 if (!wb->buf) { 1170 while (i != 0) { 1171 --i; 1172 --wb; 1173 usb_free_coherent(acm->dev, acm->writesize, 1174 wb->buf, wb->dmah); 1175 } 1176 return -ENOMEM; 1177 } 1178 } 1179 return 0; 1180 } 1181 1182 static int acm_probe(struct usb_interface *intf, 1183 const struct usb_device_id *id) 1184 { 1185 struct usb_cdc_union_desc *union_header = NULL; 1186 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1187 unsigned char *buffer = intf->altsetting->extra; 1188 int buflen = intf->altsetting->extralen; 1189 struct usb_interface *control_interface; 1190 struct usb_interface *data_interface; 1191 struct usb_endpoint_descriptor *epctrl = NULL; 1192 struct usb_endpoint_descriptor *epread = NULL; 1193 struct usb_endpoint_descriptor *epwrite = NULL; 1194 struct usb_device *usb_dev = interface_to_usbdev(intf); 1195 struct usb_cdc_parsed_header h; 1196 struct acm *acm; 1197 int minor; 1198 int ctrlsize, readsize; 1199 u8 *buf; 1200 int call_intf_num = -1; 1201 int data_intf_num = -1; 1202 unsigned long quirks; 1203 int num_rx_buf; 1204 int i; 1205 int combined_interfaces = 0; 1206 struct device *tty_dev; 1207 int rv = -ENOMEM; 1208 int res; 1209 1210 /* normal quirks */ 1211 quirks = (unsigned long)id->driver_info; 1212 1213 if (quirks == IGNORE_DEVICE) 1214 return -ENODEV; 1215 1216 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1217 1218 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1219 1220 /* handle quirks deadly to normal probing*/ 1221 if (quirks == NO_UNION_NORMAL) { 1222 data_interface = usb_ifnum_to_if(usb_dev, 1); 1223 control_interface = usb_ifnum_to_if(usb_dev, 0); 1224 /* we would crash */ 1225 if (!data_interface || !control_interface) 1226 return -ENODEV; 1227 goto skip_normal_probe; 1228 } 1229 1230 /* normal probing*/ 1231 if (!buffer) { 1232 dev_err(&intf->dev, "Weird descriptor references\n"); 1233 return -EINVAL; 1234 } 1235 1236 if (!buflen) { 1237 if (intf->cur_altsetting->endpoint && 1238 intf->cur_altsetting->endpoint->extralen && 1239 intf->cur_altsetting->endpoint->extra) { 1240 dev_dbg(&intf->dev, 1241 "Seeking extra descriptors on endpoint\n"); 1242 buflen = intf->cur_altsetting->endpoint->extralen; 1243 buffer = intf->cur_altsetting->endpoint->extra; 1244 } else { 1245 dev_err(&intf->dev, 1246 "Zero length descriptor references\n"); 1247 return -EINVAL; 1248 } 1249 } 1250 1251 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1252 union_header = h.usb_cdc_union_desc; 1253 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1254 if (cmgmd) 1255 call_intf_num = cmgmd->bDataInterface; 1256 1257 if (!union_header) { 1258 if (intf->cur_altsetting->desc.bNumEndpoints == 3) { 1259 dev_dbg(&intf->dev, "No union descriptor, assuming single interface\n"); 1260 combined_interfaces = 1; 1261 control_interface = data_interface = intf; 1262 goto look_for_collapsed_interface; 1263 } else if (call_intf_num > 0) { 1264 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1265 data_intf_num = call_intf_num; 1266 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1267 control_interface = intf; 1268 } else { 1269 dev_dbg(&intf->dev, "No union descriptor, giving up\n"); 1270 return -ENODEV; 1271 } 1272 } else { 1273 int class = -1; 1274 1275 data_intf_num = union_header->bSlaveInterface0; 1276 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1277 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1278 1279 if (control_interface) 1280 class = control_interface->cur_altsetting->desc.bInterfaceClass; 1281 1282 if (class != USB_CLASS_COMM && class != USB_CLASS_CDC_DATA) { 1283 dev_dbg(&intf->dev, "Broken union descriptor, assuming single interface\n"); 1284 combined_interfaces = 1; 1285 control_interface = data_interface = intf; 1286 goto look_for_collapsed_interface; 1287 } 1288 } 1289 1290 if (!control_interface || !data_interface) { 1291 dev_dbg(&intf->dev, "no interfaces\n"); 1292 return -ENODEV; 1293 } 1294 1295 if (data_intf_num != call_intf_num) 1296 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1297 1298 if (control_interface == data_interface) { 1299 /* some broken devices designed for windows work this way */ 1300 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1301 combined_interfaces = 1; 1302 /* a popular other OS doesn't use it */ 1303 quirks |= NO_CAP_LINE; 1304 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1305 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1306 return -EINVAL; 1307 } 1308 look_for_collapsed_interface: 1309 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1310 &epread, &epwrite, &epctrl, NULL); 1311 if (res) 1312 return res; 1313 1314 goto made_compressed_probe; 1315 } 1316 1317 skip_normal_probe: 1318 1319 /*workaround for switched interfaces */ 1320 if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { 1321 if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { 1322 dev_dbg(&intf->dev, 1323 "Your device has switched interfaces.\n"); 1324 swap(control_interface, data_interface); 1325 } else { 1326 return -EINVAL; 1327 } 1328 } 1329 1330 /* Accept probe requests only for the control interface */ 1331 if (!combined_interfaces && intf != control_interface) 1332 return -ENODEV; 1333 1334 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1335 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1336 return -EINVAL; 1337 1338 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1339 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1340 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1341 1342 1343 /* workaround for switched endpoints */ 1344 if (!usb_endpoint_dir_in(epread)) { 1345 /* descriptors are swapped */ 1346 dev_dbg(&intf->dev, 1347 "The data interface has switched endpoints\n"); 1348 swap(epread, epwrite); 1349 } 1350 made_compressed_probe: 1351 dev_dbg(&intf->dev, "interfaces are valid\n"); 1352 1353 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1354 if (!acm) 1355 return -ENOMEM; 1356 1357 tty_port_init(&acm->port); 1358 acm->port.ops = &acm_port_ops; 1359 1360 ctrlsize = usb_endpoint_maxp(epctrl); 1361 readsize = usb_endpoint_maxp(epread) * 1362 (quirks == SINGLE_RX_URB ? 1 : 2); 1363 acm->combined_interfaces = combined_interfaces; 1364 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1365 acm->control = control_interface; 1366 acm->data = data_interface; 1367 1368 usb_get_intf(acm->control); /* undone in destruct() */ 1369 1370 minor = acm_alloc_minor(acm); 1371 if (minor < 0) { 1372 acm->minor = ACM_MINOR_INVALID; 1373 goto err_put_port; 1374 } 1375 1376 acm->minor = minor; 1377 acm->dev = usb_dev; 1378 if (h.usb_cdc_acm_descriptor) 1379 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1380 if (quirks & NO_CAP_LINE) 1381 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1382 acm->ctrlsize = ctrlsize; 1383 acm->readsize = readsize; 1384 acm->rx_buflimit = num_rx_buf; 1385 INIT_DELAYED_WORK(&acm->dwork, acm_softint); 1386 init_waitqueue_head(&acm->wioctl); 1387 spin_lock_init(&acm->write_lock); 1388 spin_lock_init(&acm->read_lock); 1389 mutex_init(&acm->mutex); 1390 if (usb_endpoint_xfer_int(epread)) { 1391 acm->bInterval = epread->bInterval; 1392 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1393 } else { 1394 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1395 } 1396 if (usb_endpoint_xfer_int(epwrite)) 1397 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1398 else 1399 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1400 init_usb_anchor(&acm->delayed); 1401 acm->quirks = quirks; 1402 1403 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1404 if (!buf) 1405 goto err_put_port; 1406 acm->ctrl_buffer = buf; 1407 1408 if (acm_write_buffers_alloc(acm) < 0) 1409 goto err_free_ctrl_buffer; 1410 1411 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1412 if (!acm->ctrlurb) 1413 goto err_free_write_buffers; 1414 1415 for (i = 0; i < num_rx_buf; i++) { 1416 struct acm_rb *rb = &(acm->read_buffers[i]); 1417 struct urb *urb; 1418 1419 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1420 &rb->dma); 1421 if (!rb->base) 1422 goto err_free_read_urbs; 1423 rb->index = i; 1424 rb->instance = acm; 1425 1426 urb = usb_alloc_urb(0, GFP_KERNEL); 1427 if (!urb) 1428 goto err_free_read_urbs; 1429 1430 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1431 urb->transfer_dma = rb->dma; 1432 if (usb_endpoint_xfer_int(epread)) 1433 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1434 acm->readsize, 1435 acm_read_bulk_callback, rb, 1436 acm->bInterval); 1437 else 1438 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1439 acm->readsize, 1440 acm_read_bulk_callback, rb); 1441 1442 acm->read_urbs[i] = urb; 1443 __set_bit(i, &acm->read_urbs_free); 1444 } 1445 for (i = 0; i < ACM_NW; i++) { 1446 struct acm_wb *snd = &(acm->wb[i]); 1447 1448 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1449 if (!snd->urb) 1450 goto err_free_write_urbs; 1451 1452 if (usb_endpoint_xfer_int(epwrite)) 1453 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1454 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1455 else 1456 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1457 NULL, acm->writesize, acm_write_bulk, snd); 1458 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1459 if (quirks & SEND_ZERO_PACKET) 1460 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1461 snd->instance = acm; 1462 } 1463 1464 usb_set_intfdata(intf, acm); 1465 1466 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1467 if (i < 0) 1468 goto err_free_write_urbs; 1469 1470 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1471 struct usb_cdc_country_functional_desc * cfd = 1472 h.usb_cdc_country_functional_desc; 1473 1474 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1475 if (!acm->country_codes) 1476 goto skip_countries; 1477 acm->country_code_size = cfd->bLength - 4; 1478 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1479 cfd->bLength - 4); 1480 acm->country_rel_date = cfd->iCountryCodeRelDate; 1481 1482 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1483 if (i < 0) { 1484 kfree(acm->country_codes); 1485 acm->country_codes = NULL; 1486 acm->country_code_size = 0; 1487 goto skip_countries; 1488 } 1489 1490 i = device_create_file(&intf->dev, 1491 &dev_attr_iCountryCodeRelDate); 1492 if (i < 0) { 1493 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1494 kfree(acm->country_codes); 1495 acm->country_codes = NULL; 1496 acm->country_code_size = 0; 1497 goto skip_countries; 1498 } 1499 } 1500 1501 skip_countries: 1502 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1503 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1504 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1505 /* works around buggy devices */ 1506 epctrl->bInterval ? epctrl->bInterval : 16); 1507 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1508 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1509 acm->notification_buffer = NULL; 1510 acm->nb_index = 0; 1511 acm->nb_size = 0; 1512 1513 acm->line.dwDTERate = cpu_to_le32(9600); 1514 acm->line.bDataBits = 8; 1515 acm_set_line(acm, &acm->line); 1516 1517 if (!acm->combined_interfaces) { 1518 rv = usb_driver_claim_interface(&acm_driver, data_interface, acm); 1519 if (rv) 1520 goto err_remove_files; 1521 } 1522 1523 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1524 &control_interface->dev); 1525 if (IS_ERR(tty_dev)) { 1526 rv = PTR_ERR(tty_dev); 1527 goto err_release_data_interface; 1528 } 1529 1530 if (quirks & CLEAR_HALT_CONDITIONS) { 1531 usb_clear_halt(usb_dev, acm->in); 1532 usb_clear_halt(usb_dev, acm->out); 1533 } 1534 1535 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1536 1537 return 0; 1538 1539 err_release_data_interface: 1540 if (!acm->combined_interfaces) { 1541 /* Clear driver data so that disconnect() returns early. */ 1542 usb_set_intfdata(data_interface, NULL); 1543 usb_driver_release_interface(&acm_driver, data_interface); 1544 } 1545 err_remove_files: 1546 if (acm->country_codes) { 1547 device_remove_file(&acm->control->dev, 1548 &dev_attr_wCountryCodes); 1549 device_remove_file(&acm->control->dev, 1550 &dev_attr_iCountryCodeRelDate); 1551 } 1552 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1553 err_free_write_urbs: 1554 for (i = 0; i < ACM_NW; i++) 1555 usb_free_urb(acm->wb[i].urb); 1556 err_free_read_urbs: 1557 for (i = 0; i < num_rx_buf; i++) 1558 usb_free_urb(acm->read_urbs[i]); 1559 acm_read_buffers_free(acm); 1560 usb_free_urb(acm->ctrlurb); 1561 err_free_write_buffers: 1562 acm_write_buffers_free(acm); 1563 err_free_ctrl_buffer: 1564 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1565 err_put_port: 1566 tty_port_put(&acm->port); 1567 1568 return rv; 1569 } 1570 1571 static void acm_disconnect(struct usb_interface *intf) 1572 { 1573 struct acm *acm = usb_get_intfdata(intf); 1574 struct tty_struct *tty; 1575 int i; 1576 1577 /* sibling interface is already cleaning up */ 1578 if (!acm) 1579 return; 1580 1581 acm->disconnected = true; 1582 /* 1583 * there is a circular dependency. acm_softint() can resubmit 1584 * the URBs in error handling so we need to block any 1585 * submission right away 1586 */ 1587 acm_poison_urbs(acm); 1588 mutex_lock(&acm->mutex); 1589 if (acm->country_codes) { 1590 device_remove_file(&acm->control->dev, 1591 &dev_attr_wCountryCodes); 1592 device_remove_file(&acm->control->dev, 1593 &dev_attr_iCountryCodeRelDate); 1594 } 1595 wake_up_all(&acm->wioctl); 1596 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1597 usb_set_intfdata(acm->control, NULL); 1598 usb_set_intfdata(acm->data, NULL); 1599 mutex_unlock(&acm->mutex); 1600 1601 tty = tty_port_tty_get(&acm->port); 1602 if (tty) { 1603 tty_vhangup(tty); 1604 tty_kref_put(tty); 1605 } 1606 1607 cancel_delayed_work_sync(&acm->dwork); 1608 1609 tty_unregister_device(acm_tty_driver, acm->minor); 1610 1611 usb_free_urb(acm->ctrlurb); 1612 for (i = 0; i < ACM_NW; i++) 1613 usb_free_urb(acm->wb[i].urb); 1614 for (i = 0; i < acm->rx_buflimit; i++) 1615 usb_free_urb(acm->read_urbs[i]); 1616 acm_write_buffers_free(acm); 1617 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1618 acm_read_buffers_free(acm); 1619 1620 kfree(acm->notification_buffer); 1621 1622 if (!acm->combined_interfaces) 1623 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1624 acm->data : acm->control); 1625 1626 tty_port_put(&acm->port); 1627 } 1628 1629 #ifdef CONFIG_PM 1630 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1631 { 1632 struct acm *acm = usb_get_intfdata(intf); 1633 int cnt; 1634 1635 spin_lock_irq(&acm->write_lock); 1636 if (PMSG_IS_AUTO(message)) { 1637 if (acm->transmitting) { 1638 spin_unlock_irq(&acm->write_lock); 1639 return -EBUSY; 1640 } 1641 } 1642 cnt = acm->susp_count++; 1643 spin_unlock_irq(&acm->write_lock); 1644 1645 if (cnt) 1646 return 0; 1647 1648 acm_poison_urbs(acm); 1649 cancel_delayed_work_sync(&acm->dwork); 1650 acm->urbs_in_error_delay = 0; 1651 1652 return 0; 1653 } 1654 1655 static int acm_resume(struct usb_interface *intf) 1656 { 1657 struct acm *acm = usb_get_intfdata(intf); 1658 struct urb *urb; 1659 int rv = 0; 1660 1661 spin_lock_irq(&acm->write_lock); 1662 1663 if (--acm->susp_count) 1664 goto out; 1665 1666 acm_unpoison_urbs(acm); 1667 1668 if (tty_port_initialized(&acm->port)) { 1669 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1670 1671 for (;;) { 1672 urb = usb_get_from_anchor(&acm->delayed); 1673 if (!urb) 1674 break; 1675 1676 acm_start_wb(acm, urb->context); 1677 } 1678 1679 /* 1680 * delayed error checking because we must 1681 * do the write path at all cost 1682 */ 1683 if (rv < 0) 1684 goto out; 1685 1686 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1687 } 1688 out: 1689 spin_unlock_irq(&acm->write_lock); 1690 1691 return rv; 1692 } 1693 1694 static int acm_reset_resume(struct usb_interface *intf) 1695 { 1696 struct acm *acm = usb_get_intfdata(intf); 1697 1698 if (tty_port_initialized(&acm->port)) 1699 tty_port_tty_hangup(&acm->port, false); 1700 1701 return acm_resume(intf); 1702 } 1703 1704 #endif /* CONFIG_PM */ 1705 1706 static int acm_pre_reset(struct usb_interface *intf) 1707 { 1708 struct acm *acm = usb_get_intfdata(intf); 1709 1710 clear_bit(EVENT_RX_STALL, &acm->flags); 1711 acm->nb_index = 0; /* pending control transfers are lost */ 1712 1713 return 0; 1714 } 1715 1716 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1717 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1718 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1719 USB_CDC_ACM_PROTO_VENDOR) 1720 1721 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1722 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1723 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1724 USB_CDC_ACM_PROTO_VENDOR) 1725 1726 /* 1727 * USB driver structure. 1728 */ 1729 1730 static const struct usb_device_id acm_ids[] = { 1731 /* quirky and broken devices */ 1732 { USB_DEVICE(0x0424, 0x274e), /* Microchip Technology, Inc. (formerly SMSC) */ 1733 .driver_info = DISABLE_ECHO, }, /* DISABLE ECHO in termios flag */ 1734 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1735 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1736 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1737 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1738 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1739 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1740 }, 1741 { USB_DEVICE(0x045b, 0x023c), /* Renesas R-Car H3 USB Download mode */ 1742 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1743 }, 1744 { USB_DEVICE(0x045b, 0x0247), /* Renesas R-Car D3 USB Download mode */ 1745 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1746 }, 1747 { USB_DEVICE(0x045b, 0x0248), /* Renesas R-Car M3-N USB Download mode */ 1748 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1749 }, 1750 { USB_DEVICE(0x045b, 0x024D), /* Renesas R-Car E3 USB Download mode */ 1751 .driver_info = DISABLE_ECHO, /* Don't echo banner */ 1752 }, 1753 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1754 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1755 }, 1756 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1757 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1758 }, 1759 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1760 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1761 }, 1762 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1763 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1764 }, 1765 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1766 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1767 }, 1768 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1769 .driver_info = SINGLE_RX_URB, 1770 }, 1771 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1772 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1773 }, 1774 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1775 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1776 }, 1777 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1778 .driver_info = SINGLE_RX_URB, 1779 }, 1780 { USB_DEVICE(0x1901, 0x0006), /* GE Healthcare Patient Monitor UI Controller */ 1781 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1782 }, 1783 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1784 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1785 }, 1786 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1787 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1788 }, 1789 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1790 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1791 }, 1792 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1793 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1794 }, 1795 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1796 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1797 }, 1798 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1799 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1800 }, 1801 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1802 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1803 }, 1804 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1805 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1806 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1807 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1808 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1809 }, 1810 /* Motorola H24 HSPA module: */ 1811 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1812 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1813 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1814 }, 1815 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1816 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1817 }, 1818 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1819 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1820 }, 1821 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1822 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1823 }, 1824 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1825 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1826 }, 1827 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1828 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1829 }, 1830 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1831 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1832 }, 1833 1834 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1835 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1836 data interface instead of 1837 communications interface. 1838 Maybe we should define a new 1839 quirk for this. */ 1840 }, 1841 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1842 .driver_info = NO_UNION_NORMAL, 1843 }, 1844 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1845 .driver_info = NO_UNION_NORMAL, 1846 }, 1847 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1848 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1849 }, 1850 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1851 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1852 }, 1853 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1854 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1855 }, 1856 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1857 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1858 }, 1859 { USB_DEVICE(0x0c26, 0x0020), /* Icom ICF3400 Serie */ 1860 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1861 }, 1862 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1863 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1864 }, 1865 1866 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1867 .driver_info = CLEAR_HALT_CONDITIONS, 1868 }, 1869 1870 /* Nokia S60 phones expose two ACM channels. The first is 1871 * a modem and is picked up by the standard AT-command 1872 * information below. The second is 'vendor-specific' but 1873 * is treated as a serial device at the S60 end, so we want 1874 * to expose it on Linux too. */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1888 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1889 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1890 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1891 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1892 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1893 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1894 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1895 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1896 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1897 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1898 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1899 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1900 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1901 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1902 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1903 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1904 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1905 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1906 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1907 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1908 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1909 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1910 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1911 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1912 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1913 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1914 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1915 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1916 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1917 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1918 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1919 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1920 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1921 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1922 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1923 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1924 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1925 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1926 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1927 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1928 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1929 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1930 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1931 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1932 1933 /* Support for Owen devices */ 1934 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1935 1936 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1937 1938 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1939 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1940 .driver_info = IGNORE_DEVICE, 1941 }, 1942 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1943 .driver_info = IGNORE_DEVICE, 1944 }, 1945 #endif 1946 1947 #if IS_ENABLED(CONFIG_IR_TOY) 1948 { USB_DEVICE(0x04d8, 0xfd08), 1949 .driver_info = IGNORE_DEVICE, 1950 }, 1951 1952 { USB_DEVICE(0x04d8, 0xf58b), 1953 .driver_info = IGNORE_DEVICE, 1954 }, 1955 #endif 1956 1957 #if IS_ENABLED(CONFIG_USB_SERIAL_XR) 1958 { USB_DEVICE(0x04e2, 0x1400), .driver_info = IGNORE_DEVICE }, 1959 { USB_DEVICE(0x04e2, 0x1401), .driver_info = IGNORE_DEVICE }, 1960 { USB_DEVICE(0x04e2, 0x1402), .driver_info = IGNORE_DEVICE }, 1961 { USB_DEVICE(0x04e2, 0x1403), .driver_info = IGNORE_DEVICE }, 1962 { USB_DEVICE(0x04e2, 0x1410), .driver_info = IGNORE_DEVICE }, 1963 { USB_DEVICE(0x04e2, 0x1411), .driver_info = IGNORE_DEVICE }, 1964 { USB_DEVICE(0x04e2, 0x1412), .driver_info = IGNORE_DEVICE }, 1965 { USB_DEVICE(0x04e2, 0x1414), .driver_info = IGNORE_DEVICE }, 1966 { USB_DEVICE(0x04e2, 0x1420), .driver_info = IGNORE_DEVICE }, 1967 { USB_DEVICE(0x04e2, 0x1422), .driver_info = IGNORE_DEVICE }, 1968 { USB_DEVICE(0x04e2, 0x1424), .driver_info = IGNORE_DEVICE }, 1969 #endif 1970 1971 /*Samsung phone in firmware update mode */ 1972 { USB_DEVICE(0x04e8, 0x685d), 1973 .driver_info = IGNORE_DEVICE, 1974 }, 1975 1976 /* Exclude Infineon Flash Loader utility */ 1977 { USB_DEVICE(0x058b, 0x0041), 1978 .driver_info = IGNORE_DEVICE, 1979 }, 1980 1981 /* Exclude ETAS ES58x */ 1982 { USB_DEVICE(0x108c, 0x0159), /* ES581.4 */ 1983 .driver_info = IGNORE_DEVICE, 1984 }, 1985 { USB_DEVICE(0x108c, 0x0168), /* ES582.1 */ 1986 .driver_info = IGNORE_DEVICE, 1987 }, 1988 { USB_DEVICE(0x108c, 0x0169), /* ES584.1 */ 1989 .driver_info = IGNORE_DEVICE, 1990 }, 1991 1992 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1993 .driver_info = SEND_ZERO_PACKET, 1994 }, 1995 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1996 .driver_info = SEND_ZERO_PACKET, 1997 }, 1998 1999 /* Exclude Goodix Fingerprint Reader */ 2000 { USB_DEVICE(0x27c6, 0x5395), 2001 .driver_info = IGNORE_DEVICE, 2002 }, 2003 2004 /* Exclude Heimann Sensor GmbH USB appset demo */ 2005 { USB_DEVICE(0x32a7, 0x0000), 2006 .driver_info = IGNORE_DEVICE, 2007 }, 2008 2009 /* control interfaces without any protocol set */ 2010 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2011 USB_CDC_PROTO_NONE) }, 2012 2013 /* control interfaces with various AT-command sets */ 2014 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2015 USB_CDC_ACM_PROTO_AT_V25TER) }, 2016 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2017 USB_CDC_ACM_PROTO_AT_PCCA101) }, 2018 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2019 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 2020 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2021 USB_CDC_ACM_PROTO_AT_GSM) }, 2022 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2023 USB_CDC_ACM_PROTO_AT_3G) }, 2024 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 2025 USB_CDC_ACM_PROTO_AT_CDMA) }, 2026 2027 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 2028 .driver_info = SEND_ZERO_PACKET, 2029 }, 2030 2031 { } 2032 }; 2033 2034 MODULE_DEVICE_TABLE(usb, acm_ids); 2035 2036 static struct usb_driver acm_driver = { 2037 .name = "cdc_acm", 2038 .probe = acm_probe, 2039 .disconnect = acm_disconnect, 2040 #ifdef CONFIG_PM 2041 .suspend = acm_suspend, 2042 .resume = acm_resume, 2043 .reset_resume = acm_reset_resume, 2044 #endif 2045 .pre_reset = acm_pre_reset, 2046 .id_table = acm_ids, 2047 #ifdef CONFIG_PM 2048 .supports_autosuspend = 1, 2049 #endif 2050 .disable_hub_initiated_lpm = 1, 2051 }; 2052 2053 /* 2054 * TTY driver structures. 2055 */ 2056 2057 static const struct tty_operations acm_ops = { 2058 .install = acm_tty_install, 2059 .open = acm_tty_open, 2060 .close = acm_tty_close, 2061 .cleanup = acm_tty_cleanup, 2062 .hangup = acm_tty_hangup, 2063 .write = acm_tty_write, 2064 .write_room = acm_tty_write_room, 2065 .flush_buffer = acm_tty_flush_buffer, 2066 .ioctl = acm_tty_ioctl, 2067 .throttle = acm_tty_throttle, 2068 .unthrottle = acm_tty_unthrottle, 2069 .chars_in_buffer = acm_tty_chars_in_buffer, 2070 .break_ctl = acm_tty_break_ctl, 2071 .set_termios = acm_tty_set_termios, 2072 .tiocmget = acm_tty_tiocmget, 2073 .tiocmset = acm_tty_tiocmset, 2074 .get_serial = get_serial_info, 2075 .set_serial = set_serial_info, 2076 .get_icount = acm_tty_get_icount, 2077 }; 2078 2079 /* 2080 * Init / exit. 2081 */ 2082 2083 static int __init acm_init(void) 2084 { 2085 int retval; 2086 acm_tty_driver = tty_alloc_driver(ACM_TTY_MINORS, TTY_DRIVER_REAL_RAW | 2087 TTY_DRIVER_DYNAMIC_DEV); 2088 if (IS_ERR(acm_tty_driver)) 2089 return PTR_ERR(acm_tty_driver); 2090 acm_tty_driver->driver_name = "acm", 2091 acm_tty_driver->name = "ttyACM", 2092 acm_tty_driver->major = ACM_TTY_MAJOR, 2093 acm_tty_driver->minor_start = 0, 2094 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2095 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2096 acm_tty_driver->init_termios = tty_std_termios; 2097 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2098 HUPCL | CLOCAL; 2099 tty_set_operations(acm_tty_driver, &acm_ops); 2100 2101 retval = tty_register_driver(acm_tty_driver); 2102 if (retval) { 2103 tty_driver_kref_put(acm_tty_driver); 2104 return retval; 2105 } 2106 2107 retval = usb_register(&acm_driver); 2108 if (retval) { 2109 tty_unregister_driver(acm_tty_driver); 2110 tty_driver_kref_put(acm_tty_driver); 2111 return retval; 2112 } 2113 2114 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2115 2116 return 0; 2117 } 2118 2119 static void __exit acm_exit(void) 2120 { 2121 usb_deregister(&acm_driver); 2122 tty_unregister_driver(acm_tty_driver); 2123 tty_driver_kref_put(acm_tty_driver); 2124 idr_destroy(&acm_minors); 2125 } 2126 2127 module_init(acm_init); 2128 module_exit(acm_exit); 2129 2130 MODULE_AUTHOR(DRIVER_AUTHOR); 2131 MODULE_DESCRIPTION(DRIVER_DESC); 2132 MODULE_LICENSE("GPL"); 2133 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2134