1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * cdc-acm.c 4 * 5 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 6 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 7 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 8 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 9 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 10 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 11 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 12 * 13 * USB Abstract Control Model driver for USB modems and ISDN adapters 14 * 15 * Sponsored by SuSE 16 */ 17 18 #undef DEBUG 19 #undef VERBOSE_DEBUG 20 21 #include <linux/kernel.h> 22 #include <linux/sched/signal.h> 23 #include <linux/errno.h> 24 #include <linux/init.h> 25 #include <linux/slab.h> 26 #include <linux/log2.h> 27 #include <linux/tty.h> 28 #include <linux/serial.h> 29 #include <linux/tty_driver.h> 30 #include <linux/tty_flip.h> 31 #include <linux/module.h> 32 #include <linux/mutex.h> 33 #include <linux/uaccess.h> 34 #include <linux/usb.h> 35 #include <linux/usb/cdc.h> 36 #include <asm/byteorder.h> 37 #include <asm/unaligned.h> 38 #include <linux/idr.h> 39 #include <linux/list.h> 40 41 #include "cdc-acm.h" 42 43 44 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 45 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 46 47 static struct usb_driver acm_driver; 48 static struct tty_driver *acm_tty_driver; 49 50 static DEFINE_IDR(acm_minors); 51 static DEFINE_MUTEX(acm_minors_lock); 52 53 static void acm_tty_set_termios(struct tty_struct *tty, 54 struct ktermios *termios_old); 55 56 /* 57 * acm_minors accessors 58 */ 59 60 /* 61 * Look up an ACM structure by minor. If found and not disconnected, increment 62 * its refcount and return it with its mutex held. 63 */ 64 static struct acm *acm_get_by_minor(unsigned int minor) 65 { 66 struct acm *acm; 67 68 mutex_lock(&acm_minors_lock); 69 acm = idr_find(&acm_minors, minor); 70 if (acm) { 71 mutex_lock(&acm->mutex); 72 if (acm->disconnected) { 73 mutex_unlock(&acm->mutex); 74 acm = NULL; 75 } else { 76 tty_port_get(&acm->port); 77 mutex_unlock(&acm->mutex); 78 } 79 } 80 mutex_unlock(&acm_minors_lock); 81 return acm; 82 } 83 84 /* 85 * Try to find an available minor number and if found, associate it with 'acm'. 86 */ 87 static int acm_alloc_minor(struct acm *acm) 88 { 89 int minor; 90 91 mutex_lock(&acm_minors_lock); 92 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 93 mutex_unlock(&acm_minors_lock); 94 95 return minor; 96 } 97 98 /* Release the minor number associated with 'acm'. */ 99 static void acm_release_minor(struct acm *acm) 100 { 101 mutex_lock(&acm_minors_lock); 102 idr_remove(&acm_minors, acm->minor); 103 mutex_unlock(&acm_minors_lock); 104 } 105 106 /* 107 * Functions for ACM control messages. 108 */ 109 110 static int acm_ctrl_msg(struct acm *acm, int request, int value, 111 void *buf, int len) 112 { 113 int retval; 114 115 retval = usb_autopm_get_interface(acm->control); 116 if (retval) 117 return retval; 118 119 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 120 request, USB_RT_ACM, value, 121 acm->control->altsetting[0].desc.bInterfaceNumber, 122 buf, len, 5000); 123 124 dev_dbg(&acm->control->dev, 125 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 126 __func__, request, value, len, retval); 127 128 usb_autopm_put_interface(acm->control); 129 130 return retval < 0 ? retval : 0; 131 } 132 133 /* devices aren't required to support these requests. 134 * the cdc acm descriptor tells whether they do... 135 */ 136 static inline int acm_set_control(struct acm *acm, int control) 137 { 138 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 139 return -EOPNOTSUPP; 140 141 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 142 control, NULL, 0); 143 } 144 145 #define acm_set_line(acm, line) \ 146 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 147 #define acm_send_break(acm, ms) \ 148 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 149 150 static void acm_kill_urbs(struct acm *acm) 151 { 152 int i; 153 154 usb_kill_urb(acm->ctrlurb); 155 for (i = 0; i < ACM_NW; i++) 156 usb_kill_urb(acm->wb[i].urb); 157 for (i = 0; i < acm->rx_buflimit; i++) 158 usb_kill_urb(acm->read_urbs[i]); 159 } 160 161 /* 162 * Write buffer management. 163 * All of these assume proper locks taken by the caller. 164 */ 165 166 static int acm_wb_alloc(struct acm *acm) 167 { 168 int i, wbn; 169 struct acm_wb *wb; 170 171 wbn = 0; 172 i = 0; 173 for (;;) { 174 wb = &acm->wb[wbn]; 175 if (!wb->use) { 176 wb->use = 1; 177 wb->len = 0; 178 return wbn; 179 } 180 wbn = (wbn + 1) % ACM_NW; 181 if (++i >= ACM_NW) 182 return -1; 183 } 184 } 185 186 static int acm_wb_is_avail(struct acm *acm) 187 { 188 int i, n; 189 unsigned long flags; 190 191 n = ACM_NW; 192 spin_lock_irqsave(&acm->write_lock, flags); 193 for (i = 0; i < ACM_NW; i++) 194 n -= acm->wb[i].use; 195 spin_unlock_irqrestore(&acm->write_lock, flags); 196 return n; 197 } 198 199 /* 200 * Finish write. Caller must hold acm->write_lock 201 */ 202 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 203 { 204 wb->use = 0; 205 acm->transmitting--; 206 usb_autopm_put_interface_async(acm->control); 207 } 208 209 /* 210 * Poke write. 211 * 212 * the caller is responsible for locking 213 */ 214 215 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 216 { 217 int rc; 218 219 acm->transmitting++; 220 221 wb->urb->transfer_buffer = wb->buf; 222 wb->urb->transfer_dma = wb->dmah; 223 wb->urb->transfer_buffer_length = wb->len; 224 wb->urb->dev = acm->dev; 225 226 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 227 if (rc < 0) { 228 dev_err(&acm->data->dev, 229 "%s - usb_submit_urb(write bulk) failed: %d\n", 230 __func__, rc); 231 acm_write_done(acm, wb); 232 } 233 return rc; 234 } 235 236 /* 237 * attributes exported through sysfs 238 */ 239 static ssize_t bmCapabilities_show 240 (struct device *dev, struct device_attribute *attr, char *buf) 241 { 242 struct usb_interface *intf = to_usb_interface(dev); 243 struct acm *acm = usb_get_intfdata(intf); 244 245 return sprintf(buf, "%d", acm->ctrl_caps); 246 } 247 static DEVICE_ATTR_RO(bmCapabilities); 248 249 static ssize_t wCountryCodes_show 250 (struct device *dev, struct device_attribute *attr, char *buf) 251 { 252 struct usb_interface *intf = to_usb_interface(dev); 253 struct acm *acm = usb_get_intfdata(intf); 254 255 memcpy(buf, acm->country_codes, acm->country_code_size); 256 return acm->country_code_size; 257 } 258 259 static DEVICE_ATTR_RO(wCountryCodes); 260 261 static ssize_t iCountryCodeRelDate_show 262 (struct device *dev, struct device_attribute *attr, char *buf) 263 { 264 struct usb_interface *intf = to_usb_interface(dev); 265 struct acm *acm = usb_get_intfdata(intf); 266 267 return sprintf(buf, "%d", acm->country_rel_date); 268 } 269 270 static DEVICE_ATTR_RO(iCountryCodeRelDate); 271 /* 272 * Interrupt handlers for various ACM device responses 273 */ 274 275 static void acm_process_notification(struct acm *acm, unsigned char *buf) 276 { 277 int newctrl; 278 int difference; 279 unsigned long flags; 280 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 281 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 282 283 switch (dr->bNotificationType) { 284 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 285 dev_dbg(&acm->control->dev, 286 "%s - network connection: %d\n", __func__, dr->wValue); 287 break; 288 289 case USB_CDC_NOTIFY_SERIAL_STATE: 290 if (le16_to_cpu(dr->wLength) != 2) { 291 dev_dbg(&acm->control->dev, 292 "%s - malformed serial state\n", __func__); 293 break; 294 } 295 296 newctrl = get_unaligned_le16(data); 297 dev_dbg(&acm->control->dev, 298 "%s - serial state: 0x%x\n", __func__, newctrl); 299 300 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 301 dev_dbg(&acm->control->dev, 302 "%s - calling hangup\n", __func__); 303 tty_port_tty_hangup(&acm->port, false); 304 } 305 306 difference = acm->ctrlin ^ newctrl; 307 spin_lock_irqsave(&acm->read_lock, flags); 308 acm->ctrlin = newctrl; 309 acm->oldcount = acm->iocount; 310 311 if (difference & ACM_CTRL_DSR) 312 acm->iocount.dsr++; 313 if (difference & ACM_CTRL_BRK) 314 acm->iocount.brk++; 315 if (difference & ACM_CTRL_RI) 316 acm->iocount.rng++; 317 if (difference & ACM_CTRL_DCD) 318 acm->iocount.dcd++; 319 if (difference & ACM_CTRL_FRAMING) 320 acm->iocount.frame++; 321 if (difference & ACM_CTRL_PARITY) 322 acm->iocount.parity++; 323 if (difference & ACM_CTRL_OVERRUN) 324 acm->iocount.overrun++; 325 spin_unlock_irqrestore(&acm->read_lock, flags); 326 327 if (difference) 328 wake_up_all(&acm->wioctl); 329 330 break; 331 332 default: 333 dev_dbg(&acm->control->dev, 334 "%s - unknown notification %d received: index %d len %d\n", 335 __func__, 336 dr->bNotificationType, dr->wIndex, dr->wLength); 337 } 338 } 339 340 /* control interface reports status changes with "interrupt" transfers */ 341 static void acm_ctrl_irq(struct urb *urb) 342 { 343 struct acm *acm = urb->context; 344 struct usb_cdc_notification *dr = urb->transfer_buffer; 345 unsigned int current_size = urb->actual_length; 346 unsigned int expected_size, copy_size, alloc_size; 347 int retval; 348 int status = urb->status; 349 350 switch (status) { 351 case 0: 352 /* success */ 353 break; 354 case -ECONNRESET: 355 case -ENOENT: 356 case -ESHUTDOWN: 357 /* this urb is terminated, clean up */ 358 acm->nb_index = 0; 359 dev_dbg(&acm->control->dev, 360 "%s - urb shutting down with status: %d\n", 361 __func__, status); 362 return; 363 default: 364 dev_dbg(&acm->control->dev, 365 "%s - nonzero urb status received: %d\n", 366 __func__, status); 367 goto exit; 368 } 369 370 usb_mark_last_busy(acm->dev); 371 372 if (acm->nb_index) 373 dr = (struct usb_cdc_notification *)acm->notification_buffer; 374 375 /* size = notification-header + (optional) data */ 376 expected_size = sizeof(struct usb_cdc_notification) + 377 le16_to_cpu(dr->wLength); 378 379 if (current_size < expected_size) { 380 /* notification is transmitted fragmented, reassemble */ 381 if (acm->nb_size < expected_size) { 382 if (acm->nb_size) { 383 kfree(acm->notification_buffer); 384 acm->nb_size = 0; 385 } 386 alloc_size = roundup_pow_of_two(expected_size); 387 /* 388 * kmalloc ensures a valid notification_buffer after a 389 * use of kfree in case the previous allocation was too 390 * small. Final freeing is done on disconnect. 391 */ 392 acm->notification_buffer = 393 kmalloc(alloc_size, GFP_ATOMIC); 394 if (!acm->notification_buffer) 395 goto exit; 396 acm->nb_size = alloc_size; 397 } 398 399 copy_size = min(current_size, 400 expected_size - acm->nb_index); 401 402 memcpy(&acm->notification_buffer[acm->nb_index], 403 urb->transfer_buffer, copy_size); 404 acm->nb_index += copy_size; 405 current_size = acm->nb_index; 406 } 407 408 if (current_size >= expected_size) { 409 /* notification complete */ 410 acm_process_notification(acm, (unsigned char *)dr); 411 acm->nb_index = 0; 412 } 413 414 exit: 415 retval = usb_submit_urb(urb, GFP_ATOMIC); 416 if (retval && retval != -EPERM) 417 dev_err(&acm->control->dev, 418 "%s - usb_submit_urb failed: %d\n", __func__, retval); 419 } 420 421 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 422 { 423 int res; 424 425 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 426 return 0; 427 428 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 429 if (res) { 430 if (res != -EPERM && res != -ENODEV) { 431 dev_err(&acm->data->dev, 432 "urb %d failed submission with %d\n", 433 index, res); 434 } 435 set_bit(index, &acm->read_urbs_free); 436 return res; 437 } else { 438 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 439 } 440 441 return 0; 442 } 443 444 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 445 { 446 int res; 447 int i; 448 449 for (i = 0; i < acm->rx_buflimit; ++i) { 450 res = acm_submit_read_urb(acm, i, mem_flags); 451 if (res) 452 return res; 453 } 454 455 return 0; 456 } 457 458 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 459 { 460 if (!urb->actual_length) 461 return; 462 463 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 464 urb->actual_length); 465 tty_flip_buffer_push(&acm->port); 466 } 467 468 static void acm_read_bulk_callback(struct urb *urb) 469 { 470 struct acm_rb *rb = urb->context; 471 struct acm *acm = rb->instance; 472 unsigned long flags; 473 int status = urb->status; 474 475 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 476 rb->index, urb->actual_length, status); 477 478 set_bit(rb->index, &acm->read_urbs_free); 479 480 if (!acm->dev) { 481 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 482 return; 483 } 484 485 switch (status) { 486 case 0: 487 usb_mark_last_busy(acm->dev); 488 acm_process_read_urb(acm, urb); 489 break; 490 case -EPIPE: 491 set_bit(EVENT_RX_STALL, &acm->flags); 492 schedule_work(&acm->work); 493 return; 494 case -ENOENT: 495 case -ECONNRESET: 496 case -ESHUTDOWN: 497 dev_dbg(&acm->data->dev, 498 "%s - urb shutting down with status: %d\n", 499 __func__, status); 500 return; 501 default: 502 dev_dbg(&acm->data->dev, 503 "%s - nonzero urb status received: %d\n", 504 __func__, status); 505 break; 506 } 507 508 /* 509 * Unthrottle may run on another CPU which needs to see events 510 * in the same order. Submission has an implict barrier 511 */ 512 smp_mb__before_atomic(); 513 514 /* throttle device if requested by tty */ 515 spin_lock_irqsave(&acm->read_lock, flags); 516 acm->throttled = acm->throttle_req; 517 if (!acm->throttled) { 518 spin_unlock_irqrestore(&acm->read_lock, flags); 519 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 520 } else { 521 spin_unlock_irqrestore(&acm->read_lock, flags); 522 } 523 } 524 525 /* data interface wrote those outgoing bytes */ 526 static void acm_write_bulk(struct urb *urb) 527 { 528 struct acm_wb *wb = urb->context; 529 struct acm *acm = wb->instance; 530 unsigned long flags; 531 int status = urb->status; 532 533 if (status || (urb->actual_length != urb->transfer_buffer_length)) 534 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 535 urb->actual_length, 536 urb->transfer_buffer_length, 537 status); 538 539 spin_lock_irqsave(&acm->write_lock, flags); 540 acm_write_done(acm, wb); 541 spin_unlock_irqrestore(&acm->write_lock, flags); 542 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 543 schedule_work(&acm->work); 544 } 545 546 static void acm_softint(struct work_struct *work) 547 { 548 int i; 549 struct acm *acm = container_of(work, struct acm, work); 550 551 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 552 if (!(usb_autopm_get_interface(acm->data))) { 553 for (i = 0; i < acm->rx_buflimit; i++) 554 usb_kill_urb(acm->read_urbs[i]); 555 usb_clear_halt(acm->dev, acm->in); 556 acm_submit_read_urbs(acm, GFP_KERNEL); 557 usb_autopm_put_interface(acm->data); 558 } 559 clear_bit(EVENT_RX_STALL, &acm->flags); 560 } 561 562 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) { 563 tty_port_tty_wakeup(&acm->port); 564 clear_bit(EVENT_TTY_WAKEUP, &acm->flags); 565 } 566 } 567 568 /* 569 * TTY handlers 570 */ 571 572 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 573 { 574 struct acm *acm; 575 int retval; 576 577 acm = acm_get_by_minor(tty->index); 578 if (!acm) 579 return -ENODEV; 580 581 retval = tty_standard_install(driver, tty); 582 if (retval) 583 goto error_init_termios; 584 585 tty->driver_data = acm; 586 587 return 0; 588 589 error_init_termios: 590 tty_port_put(&acm->port); 591 return retval; 592 } 593 594 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 595 { 596 struct acm *acm = tty->driver_data; 597 598 return tty_port_open(&acm->port, tty, filp); 599 } 600 601 static void acm_port_dtr_rts(struct tty_port *port, int raise) 602 { 603 struct acm *acm = container_of(port, struct acm, port); 604 int val; 605 int res; 606 607 if (raise) 608 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 609 else 610 val = 0; 611 612 /* FIXME: add missing ctrlout locking throughout driver */ 613 acm->ctrlout = val; 614 615 res = acm_set_control(acm, val); 616 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 617 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 618 } 619 620 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 621 { 622 struct acm *acm = container_of(port, struct acm, port); 623 int retval = -ENODEV; 624 int i; 625 626 mutex_lock(&acm->mutex); 627 if (acm->disconnected) 628 goto disconnected; 629 630 retval = usb_autopm_get_interface(acm->control); 631 if (retval) 632 goto error_get_interface; 633 634 /* 635 * FIXME: Why do we need this? Allocating 64K of physically contiguous 636 * memory is really nasty... 637 */ 638 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 639 acm->control->needs_remote_wakeup = 1; 640 641 acm->ctrlurb->dev = acm->dev; 642 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 643 if (retval) { 644 dev_err(&acm->control->dev, 645 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 646 goto error_submit_urb; 647 } 648 649 acm_tty_set_termios(tty, NULL); 650 651 /* 652 * Unthrottle device in case the TTY was closed while throttled. 653 */ 654 spin_lock_irq(&acm->read_lock); 655 acm->throttled = 0; 656 acm->throttle_req = 0; 657 spin_unlock_irq(&acm->read_lock); 658 659 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 660 if (retval) 661 goto error_submit_read_urbs; 662 663 usb_autopm_put_interface(acm->control); 664 665 mutex_unlock(&acm->mutex); 666 667 return 0; 668 669 error_submit_read_urbs: 670 for (i = 0; i < acm->rx_buflimit; i++) 671 usb_kill_urb(acm->read_urbs[i]); 672 usb_kill_urb(acm->ctrlurb); 673 error_submit_urb: 674 usb_autopm_put_interface(acm->control); 675 error_get_interface: 676 disconnected: 677 mutex_unlock(&acm->mutex); 678 679 return usb_translate_errors(retval); 680 } 681 682 static void acm_port_destruct(struct tty_port *port) 683 { 684 struct acm *acm = container_of(port, struct acm, port); 685 686 acm_release_minor(acm); 687 usb_put_intf(acm->control); 688 kfree(acm->country_codes); 689 kfree(acm); 690 } 691 692 static void acm_port_shutdown(struct tty_port *port) 693 { 694 struct acm *acm = container_of(port, struct acm, port); 695 struct urb *urb; 696 struct acm_wb *wb; 697 698 /* 699 * Need to grab write_lock to prevent race with resume, but no need to 700 * hold it due to the tty-port initialised flag. 701 */ 702 spin_lock_irq(&acm->write_lock); 703 spin_unlock_irq(&acm->write_lock); 704 705 usb_autopm_get_interface_no_resume(acm->control); 706 acm->control->needs_remote_wakeup = 0; 707 usb_autopm_put_interface(acm->control); 708 709 for (;;) { 710 urb = usb_get_from_anchor(&acm->delayed); 711 if (!urb) 712 break; 713 wb = urb->context; 714 wb->use = 0; 715 usb_autopm_put_interface_async(acm->control); 716 } 717 718 acm_kill_urbs(acm); 719 } 720 721 static void acm_tty_cleanup(struct tty_struct *tty) 722 { 723 struct acm *acm = tty->driver_data; 724 725 tty_port_put(&acm->port); 726 } 727 728 static void acm_tty_hangup(struct tty_struct *tty) 729 { 730 struct acm *acm = tty->driver_data; 731 732 tty_port_hangup(&acm->port); 733 } 734 735 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 736 { 737 struct acm *acm = tty->driver_data; 738 739 tty_port_close(&acm->port, tty, filp); 740 } 741 742 static int acm_tty_write(struct tty_struct *tty, 743 const unsigned char *buf, int count) 744 { 745 struct acm *acm = tty->driver_data; 746 int stat; 747 unsigned long flags; 748 int wbn; 749 struct acm_wb *wb; 750 751 if (!count) 752 return 0; 753 754 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 755 756 spin_lock_irqsave(&acm->write_lock, flags); 757 wbn = acm_wb_alloc(acm); 758 if (wbn < 0) { 759 spin_unlock_irqrestore(&acm->write_lock, flags); 760 return 0; 761 } 762 wb = &acm->wb[wbn]; 763 764 if (!acm->dev) { 765 wb->use = 0; 766 spin_unlock_irqrestore(&acm->write_lock, flags); 767 return -ENODEV; 768 } 769 770 count = (count > acm->writesize) ? acm->writesize : count; 771 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 772 memcpy(wb->buf, buf, count); 773 wb->len = count; 774 775 stat = usb_autopm_get_interface_async(acm->control); 776 if (stat) { 777 wb->use = 0; 778 spin_unlock_irqrestore(&acm->write_lock, flags); 779 return stat; 780 } 781 782 if (acm->susp_count) { 783 if (acm->putbuffer) { 784 /* now to preserve order */ 785 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed); 786 acm->putbuffer = NULL; 787 } 788 usb_anchor_urb(wb->urb, &acm->delayed); 789 spin_unlock_irqrestore(&acm->write_lock, flags); 790 return count; 791 } else { 792 if (acm->putbuffer) { 793 /* at this point there is no good way to handle errors */ 794 acm_start_wb(acm, acm->putbuffer); 795 acm->putbuffer = NULL; 796 } 797 } 798 799 stat = acm_start_wb(acm, wb); 800 spin_unlock_irqrestore(&acm->write_lock, flags); 801 802 if (stat < 0) 803 return stat; 804 return count; 805 } 806 807 static void acm_tty_flush_chars(struct tty_struct *tty) 808 { 809 struct acm *acm = tty->driver_data; 810 struct acm_wb *cur; 811 int err; 812 unsigned long flags; 813 814 spin_lock_irqsave(&acm->write_lock, flags); 815 816 cur = acm->putbuffer; 817 if (!cur) /* nothing to do */ 818 goto out; 819 820 acm->putbuffer = NULL; 821 err = usb_autopm_get_interface_async(acm->control); 822 if (err < 0) { 823 cur->use = 0; 824 acm->putbuffer = cur; 825 goto out; 826 } 827 828 if (acm->susp_count) 829 usb_anchor_urb(cur->urb, &acm->delayed); 830 else 831 acm_start_wb(acm, cur); 832 out: 833 spin_unlock_irqrestore(&acm->write_lock, flags); 834 return; 835 } 836 837 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch) 838 { 839 struct acm *acm = tty->driver_data; 840 struct acm_wb *cur; 841 int wbn; 842 unsigned long flags; 843 844 overflow: 845 cur = acm->putbuffer; 846 if (!cur) { 847 spin_lock_irqsave(&acm->write_lock, flags); 848 wbn = acm_wb_alloc(acm); 849 if (wbn >= 0) { 850 cur = &acm->wb[wbn]; 851 acm->putbuffer = cur; 852 } 853 spin_unlock_irqrestore(&acm->write_lock, flags); 854 if (!cur) 855 return 0; 856 } 857 858 if (cur->len == acm->writesize) { 859 acm_tty_flush_chars(tty); 860 goto overflow; 861 } 862 863 cur->buf[cur->len++] = ch; 864 return 1; 865 } 866 867 static int acm_tty_write_room(struct tty_struct *tty) 868 { 869 struct acm *acm = tty->driver_data; 870 /* 871 * Do not let the line discipline to know that we have a reserve, 872 * or it might get too enthusiastic. 873 */ 874 return acm_wb_is_avail(acm) ? acm->writesize : 0; 875 } 876 877 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 878 { 879 struct acm *acm = tty->driver_data; 880 /* 881 * if the device was unplugged then any remaining characters fell out 882 * of the connector ;) 883 */ 884 if (acm->disconnected) 885 return 0; 886 /* 887 * This is inaccurate (overcounts), but it works. 888 */ 889 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 890 } 891 892 static void acm_tty_throttle(struct tty_struct *tty) 893 { 894 struct acm *acm = tty->driver_data; 895 896 spin_lock_irq(&acm->read_lock); 897 acm->throttle_req = 1; 898 spin_unlock_irq(&acm->read_lock); 899 } 900 901 static void acm_tty_unthrottle(struct tty_struct *tty) 902 { 903 struct acm *acm = tty->driver_data; 904 unsigned int was_throttled; 905 906 spin_lock_irq(&acm->read_lock); 907 was_throttled = acm->throttled; 908 acm->throttled = 0; 909 acm->throttle_req = 0; 910 spin_unlock_irq(&acm->read_lock); 911 912 if (was_throttled) 913 acm_submit_read_urbs(acm, GFP_KERNEL); 914 } 915 916 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 917 { 918 struct acm *acm = tty->driver_data; 919 int retval; 920 921 retval = acm_send_break(acm, state ? 0xffff : 0); 922 if (retval < 0) 923 dev_dbg(&acm->control->dev, 924 "%s - send break failed\n", __func__); 925 return retval; 926 } 927 928 static int acm_tty_tiocmget(struct tty_struct *tty) 929 { 930 struct acm *acm = tty->driver_data; 931 932 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 933 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 934 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 935 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 936 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 937 TIOCM_CTS; 938 } 939 940 static int acm_tty_tiocmset(struct tty_struct *tty, 941 unsigned int set, unsigned int clear) 942 { 943 struct acm *acm = tty->driver_data; 944 unsigned int newctrl; 945 946 newctrl = acm->ctrlout; 947 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 948 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 949 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 950 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 951 952 newctrl = (newctrl & ~clear) | set; 953 954 if (acm->ctrlout == newctrl) 955 return 0; 956 return acm_set_control(acm, acm->ctrlout = newctrl); 957 } 958 959 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 960 { 961 struct serial_struct tmp; 962 963 memset(&tmp, 0, sizeof(tmp)); 964 tmp.xmit_fifo_size = acm->writesize; 965 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 966 tmp.close_delay = acm->port.close_delay / 10; 967 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 968 ASYNC_CLOSING_WAIT_NONE : 969 acm->port.closing_wait / 10; 970 971 if (copy_to_user(info, &tmp, sizeof(tmp))) 972 return -EFAULT; 973 else 974 return 0; 975 } 976 977 static int set_serial_info(struct acm *acm, 978 struct serial_struct __user *newinfo) 979 { 980 struct serial_struct new_serial; 981 unsigned int closing_wait, close_delay; 982 int retval = 0; 983 984 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 985 return -EFAULT; 986 987 close_delay = new_serial.close_delay * 10; 988 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 989 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 990 991 mutex_lock(&acm->port.mutex); 992 993 if (!capable(CAP_SYS_ADMIN)) { 994 if ((close_delay != acm->port.close_delay) || 995 (closing_wait != acm->port.closing_wait)) 996 retval = -EPERM; 997 else 998 retval = -EOPNOTSUPP; 999 } else { 1000 acm->port.close_delay = close_delay; 1001 acm->port.closing_wait = closing_wait; 1002 } 1003 1004 mutex_unlock(&acm->port.mutex); 1005 return retval; 1006 } 1007 1008 static int wait_serial_change(struct acm *acm, unsigned long arg) 1009 { 1010 int rv = 0; 1011 DECLARE_WAITQUEUE(wait, current); 1012 struct async_icount old, new; 1013 1014 do { 1015 spin_lock_irq(&acm->read_lock); 1016 old = acm->oldcount; 1017 new = acm->iocount; 1018 acm->oldcount = new; 1019 spin_unlock_irq(&acm->read_lock); 1020 1021 if ((arg & TIOCM_DSR) && 1022 old.dsr != new.dsr) 1023 break; 1024 if ((arg & TIOCM_CD) && 1025 old.dcd != new.dcd) 1026 break; 1027 if ((arg & TIOCM_RI) && 1028 old.rng != new.rng) 1029 break; 1030 1031 add_wait_queue(&acm->wioctl, &wait); 1032 set_current_state(TASK_INTERRUPTIBLE); 1033 schedule(); 1034 remove_wait_queue(&acm->wioctl, &wait); 1035 if (acm->disconnected) { 1036 if (arg & TIOCM_CD) 1037 break; 1038 else 1039 rv = -ENODEV; 1040 } else { 1041 if (signal_pending(current)) 1042 rv = -ERESTARTSYS; 1043 } 1044 } while (!rv); 1045 1046 1047 1048 return rv; 1049 } 1050 1051 static int acm_tty_get_icount(struct tty_struct *tty, 1052 struct serial_icounter_struct *icount) 1053 { 1054 struct acm *acm = tty->driver_data; 1055 1056 icount->dsr = acm->iocount.dsr; 1057 icount->rng = acm->iocount.rng; 1058 icount->dcd = acm->iocount.dcd; 1059 icount->frame = acm->iocount.frame; 1060 icount->overrun = acm->iocount.overrun; 1061 icount->parity = acm->iocount.parity; 1062 icount->brk = acm->iocount.brk; 1063 1064 return 0; 1065 } 1066 1067 static int acm_tty_ioctl(struct tty_struct *tty, 1068 unsigned int cmd, unsigned long arg) 1069 { 1070 struct acm *acm = tty->driver_data; 1071 int rv = -ENOIOCTLCMD; 1072 1073 switch (cmd) { 1074 case TIOCGSERIAL: /* gets serial port data */ 1075 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 1076 break; 1077 case TIOCSSERIAL: 1078 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 1079 break; 1080 case TIOCMIWAIT: 1081 rv = usb_autopm_get_interface(acm->control); 1082 if (rv < 0) { 1083 rv = -EIO; 1084 break; 1085 } 1086 rv = wait_serial_change(acm, arg); 1087 usb_autopm_put_interface(acm->control); 1088 break; 1089 } 1090 1091 return rv; 1092 } 1093 1094 static void acm_tty_set_termios(struct tty_struct *tty, 1095 struct ktermios *termios_old) 1096 { 1097 struct acm *acm = tty->driver_data; 1098 struct ktermios *termios = &tty->termios; 1099 struct usb_cdc_line_coding newline; 1100 int newctrl = acm->ctrlout; 1101 1102 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1103 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1104 newline.bParityType = termios->c_cflag & PARENB ? 1105 (termios->c_cflag & PARODD ? 1 : 2) + 1106 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1107 switch (termios->c_cflag & CSIZE) { 1108 case CS5: 1109 newline.bDataBits = 5; 1110 break; 1111 case CS6: 1112 newline.bDataBits = 6; 1113 break; 1114 case CS7: 1115 newline.bDataBits = 7; 1116 break; 1117 case CS8: 1118 default: 1119 newline.bDataBits = 8; 1120 break; 1121 } 1122 /* FIXME: Needs to clear unsupported bits in the termios */ 1123 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1124 1125 if (C_BAUD(tty) == B0) { 1126 newline.dwDTERate = acm->line.dwDTERate; 1127 newctrl &= ~ACM_CTRL_DTR; 1128 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1129 newctrl |= ACM_CTRL_DTR; 1130 } 1131 1132 if (newctrl != acm->ctrlout) 1133 acm_set_control(acm, acm->ctrlout = newctrl); 1134 1135 if (memcmp(&acm->line, &newline, sizeof newline)) { 1136 memcpy(&acm->line, &newline, sizeof newline); 1137 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1138 __func__, 1139 le32_to_cpu(newline.dwDTERate), 1140 newline.bCharFormat, newline.bParityType, 1141 newline.bDataBits); 1142 acm_set_line(acm, &acm->line); 1143 } 1144 } 1145 1146 static const struct tty_port_operations acm_port_ops = { 1147 .dtr_rts = acm_port_dtr_rts, 1148 .shutdown = acm_port_shutdown, 1149 .activate = acm_port_activate, 1150 .destruct = acm_port_destruct, 1151 }; 1152 1153 /* 1154 * USB probe and disconnect routines. 1155 */ 1156 1157 /* Little helpers: write/read buffers free */ 1158 static void acm_write_buffers_free(struct acm *acm) 1159 { 1160 int i; 1161 struct acm_wb *wb; 1162 1163 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1164 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1165 } 1166 1167 static void acm_read_buffers_free(struct acm *acm) 1168 { 1169 int i; 1170 1171 for (i = 0; i < acm->rx_buflimit; i++) 1172 usb_free_coherent(acm->dev, acm->readsize, 1173 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1174 } 1175 1176 /* Little helper: write buffers allocate */ 1177 static int acm_write_buffers_alloc(struct acm *acm) 1178 { 1179 int i; 1180 struct acm_wb *wb; 1181 1182 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1183 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1184 &wb->dmah); 1185 if (!wb->buf) { 1186 while (i != 0) { 1187 --i; 1188 --wb; 1189 usb_free_coherent(acm->dev, acm->writesize, 1190 wb->buf, wb->dmah); 1191 } 1192 return -ENOMEM; 1193 } 1194 } 1195 return 0; 1196 } 1197 1198 static int acm_probe(struct usb_interface *intf, 1199 const struct usb_device_id *id) 1200 { 1201 struct usb_cdc_union_desc *union_header = NULL; 1202 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1203 unsigned char *buffer = intf->altsetting->extra; 1204 int buflen = intf->altsetting->extralen; 1205 struct usb_interface *control_interface; 1206 struct usb_interface *data_interface; 1207 struct usb_endpoint_descriptor *epctrl = NULL; 1208 struct usb_endpoint_descriptor *epread = NULL; 1209 struct usb_endpoint_descriptor *epwrite = NULL; 1210 struct usb_device *usb_dev = interface_to_usbdev(intf); 1211 struct usb_cdc_parsed_header h; 1212 struct acm *acm; 1213 int minor; 1214 int ctrlsize, readsize; 1215 u8 *buf; 1216 int call_intf_num = -1; 1217 int data_intf_num = -1; 1218 unsigned long quirks; 1219 int num_rx_buf; 1220 int i; 1221 int combined_interfaces = 0; 1222 struct device *tty_dev; 1223 int rv = -ENOMEM; 1224 int res; 1225 1226 /* normal quirks */ 1227 quirks = (unsigned long)id->driver_info; 1228 1229 if (quirks == IGNORE_DEVICE) 1230 return -ENODEV; 1231 1232 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1233 1234 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1235 1236 /* handle quirks deadly to normal probing*/ 1237 if (quirks == NO_UNION_NORMAL) { 1238 data_interface = usb_ifnum_to_if(usb_dev, 1); 1239 control_interface = usb_ifnum_to_if(usb_dev, 0); 1240 /* we would crash */ 1241 if (!data_interface || !control_interface) 1242 return -ENODEV; 1243 goto skip_normal_probe; 1244 } 1245 1246 /* normal probing*/ 1247 if (!buffer) { 1248 dev_err(&intf->dev, "Weird descriptor references\n"); 1249 return -EINVAL; 1250 } 1251 1252 if (!intf->cur_altsetting) 1253 return -EINVAL; 1254 1255 if (!buflen) { 1256 if (intf->cur_altsetting->endpoint && 1257 intf->cur_altsetting->endpoint->extralen && 1258 intf->cur_altsetting->endpoint->extra) { 1259 dev_dbg(&intf->dev, 1260 "Seeking extra descriptors on endpoint\n"); 1261 buflen = intf->cur_altsetting->endpoint->extralen; 1262 buffer = intf->cur_altsetting->endpoint->extra; 1263 } else { 1264 dev_err(&intf->dev, 1265 "Zero length descriptor references\n"); 1266 return -EINVAL; 1267 } 1268 } 1269 1270 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1271 union_header = h.usb_cdc_union_desc; 1272 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1273 if (cmgmd) 1274 call_intf_num = cmgmd->bDataInterface; 1275 1276 if (!union_header) { 1277 if (call_intf_num > 0) { 1278 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1279 /* quirks for Droids MuIn LCD */ 1280 if (quirks & NO_DATA_INTERFACE) { 1281 data_interface = usb_ifnum_to_if(usb_dev, 0); 1282 } else { 1283 data_intf_num = call_intf_num; 1284 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1285 } 1286 control_interface = intf; 1287 } else { 1288 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1289 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1290 return -ENODEV; 1291 } else { 1292 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1293 combined_interfaces = 1; 1294 control_interface = data_interface = intf; 1295 goto look_for_collapsed_interface; 1296 } 1297 } 1298 } else { 1299 data_intf_num = union_header->bSlaveInterface0; 1300 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1301 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1302 } 1303 1304 if (!control_interface || !data_interface) { 1305 dev_dbg(&intf->dev, "no interfaces\n"); 1306 return -ENODEV; 1307 } 1308 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1309 return -ENODEV; 1310 1311 if (data_intf_num != call_intf_num) 1312 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1313 1314 if (control_interface == data_interface) { 1315 /* some broken devices designed for windows work this way */ 1316 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1317 combined_interfaces = 1; 1318 /* a popular other OS doesn't use it */ 1319 quirks |= NO_CAP_LINE; 1320 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1321 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1322 return -EINVAL; 1323 } 1324 look_for_collapsed_interface: 1325 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1326 &epread, &epwrite, &epctrl, NULL); 1327 if (res) 1328 return res; 1329 1330 goto made_compressed_probe; 1331 } 1332 1333 skip_normal_probe: 1334 1335 /*workaround for switched interfaces */ 1336 if (data_interface->cur_altsetting->desc.bInterfaceClass 1337 != CDC_DATA_INTERFACE_TYPE) { 1338 if (control_interface->cur_altsetting->desc.bInterfaceClass 1339 == CDC_DATA_INTERFACE_TYPE) { 1340 dev_dbg(&intf->dev, 1341 "Your device has switched interfaces.\n"); 1342 swap(control_interface, data_interface); 1343 } else { 1344 return -EINVAL; 1345 } 1346 } 1347 1348 /* Accept probe requests only for the control interface */ 1349 if (!combined_interfaces && intf != control_interface) 1350 return -ENODEV; 1351 1352 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1353 /* valid in this context */ 1354 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1355 return -EBUSY; 1356 } 1357 1358 1359 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1360 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1361 return -EINVAL; 1362 1363 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1364 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1365 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1366 1367 1368 /* workaround for switched endpoints */ 1369 if (!usb_endpoint_dir_in(epread)) { 1370 /* descriptors are swapped */ 1371 dev_dbg(&intf->dev, 1372 "The data interface has switched endpoints\n"); 1373 swap(epread, epwrite); 1374 } 1375 made_compressed_probe: 1376 dev_dbg(&intf->dev, "interfaces are valid\n"); 1377 1378 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1379 if (acm == NULL) 1380 goto alloc_fail; 1381 1382 tty_port_init(&acm->port); 1383 acm->port.ops = &acm_port_ops; 1384 1385 minor = acm_alloc_minor(acm); 1386 if (minor < 0) 1387 goto alloc_fail1; 1388 1389 ctrlsize = usb_endpoint_maxp(epctrl); 1390 readsize = usb_endpoint_maxp(epread) * 1391 (quirks == SINGLE_RX_URB ? 1 : 2); 1392 acm->combined_interfaces = combined_interfaces; 1393 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1394 acm->control = control_interface; 1395 acm->data = data_interface; 1396 acm->minor = minor; 1397 acm->dev = usb_dev; 1398 if (h.usb_cdc_acm_descriptor) 1399 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1400 if (quirks & NO_CAP_LINE) 1401 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1402 acm->ctrlsize = ctrlsize; 1403 acm->readsize = readsize; 1404 acm->rx_buflimit = num_rx_buf; 1405 INIT_WORK(&acm->work, acm_softint); 1406 init_waitqueue_head(&acm->wioctl); 1407 spin_lock_init(&acm->write_lock); 1408 spin_lock_init(&acm->read_lock); 1409 mutex_init(&acm->mutex); 1410 if (usb_endpoint_xfer_int(epread)) { 1411 acm->bInterval = epread->bInterval; 1412 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1413 } else { 1414 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1415 } 1416 if (usb_endpoint_xfer_int(epwrite)) 1417 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1418 else 1419 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1420 init_usb_anchor(&acm->delayed); 1421 acm->quirks = quirks; 1422 1423 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1424 if (!buf) 1425 goto alloc_fail1; 1426 acm->ctrl_buffer = buf; 1427 1428 if (acm_write_buffers_alloc(acm) < 0) 1429 goto alloc_fail2; 1430 1431 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1432 if (!acm->ctrlurb) 1433 goto alloc_fail3; 1434 1435 for (i = 0; i < num_rx_buf; i++) { 1436 struct acm_rb *rb = &(acm->read_buffers[i]); 1437 struct urb *urb; 1438 1439 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1440 &rb->dma); 1441 if (!rb->base) 1442 goto alloc_fail4; 1443 rb->index = i; 1444 rb->instance = acm; 1445 1446 urb = usb_alloc_urb(0, GFP_KERNEL); 1447 if (!urb) 1448 goto alloc_fail4; 1449 1450 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1451 urb->transfer_dma = rb->dma; 1452 if (usb_endpoint_xfer_int(epread)) 1453 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1454 acm->readsize, 1455 acm_read_bulk_callback, rb, 1456 acm->bInterval); 1457 else 1458 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1459 acm->readsize, 1460 acm_read_bulk_callback, rb); 1461 1462 acm->read_urbs[i] = urb; 1463 __set_bit(i, &acm->read_urbs_free); 1464 } 1465 for (i = 0; i < ACM_NW; i++) { 1466 struct acm_wb *snd = &(acm->wb[i]); 1467 1468 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1469 if (snd->urb == NULL) 1470 goto alloc_fail5; 1471 1472 if (usb_endpoint_xfer_int(epwrite)) 1473 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1474 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1475 else 1476 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1477 NULL, acm->writesize, acm_write_bulk, snd); 1478 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1479 if (quirks & SEND_ZERO_PACKET) 1480 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1481 snd->instance = acm; 1482 } 1483 1484 usb_set_intfdata(intf, acm); 1485 1486 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1487 if (i < 0) 1488 goto alloc_fail5; 1489 1490 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1491 struct usb_cdc_country_functional_desc * cfd = 1492 h.usb_cdc_country_functional_desc; 1493 1494 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1495 if (!acm->country_codes) 1496 goto skip_countries; 1497 acm->country_code_size = cfd->bLength - 4; 1498 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1499 cfd->bLength - 4); 1500 acm->country_rel_date = cfd->iCountryCodeRelDate; 1501 1502 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1503 if (i < 0) { 1504 kfree(acm->country_codes); 1505 acm->country_codes = NULL; 1506 acm->country_code_size = 0; 1507 goto skip_countries; 1508 } 1509 1510 i = device_create_file(&intf->dev, 1511 &dev_attr_iCountryCodeRelDate); 1512 if (i < 0) { 1513 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1514 kfree(acm->country_codes); 1515 acm->country_codes = NULL; 1516 acm->country_code_size = 0; 1517 goto skip_countries; 1518 } 1519 } 1520 1521 skip_countries: 1522 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1523 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1524 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1525 /* works around buggy devices */ 1526 epctrl->bInterval ? epctrl->bInterval : 16); 1527 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1528 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1529 acm->notification_buffer = NULL; 1530 acm->nb_index = 0; 1531 acm->nb_size = 0; 1532 1533 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1534 1535 acm->line.dwDTERate = cpu_to_le32(9600); 1536 acm->line.bDataBits = 8; 1537 acm_set_line(acm, &acm->line); 1538 1539 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1540 usb_set_intfdata(data_interface, acm); 1541 1542 usb_get_intf(control_interface); 1543 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1544 &control_interface->dev); 1545 if (IS_ERR(tty_dev)) { 1546 rv = PTR_ERR(tty_dev); 1547 goto alloc_fail6; 1548 } 1549 1550 if (quirks & CLEAR_HALT_CONDITIONS) { 1551 usb_clear_halt(usb_dev, acm->in); 1552 usb_clear_halt(usb_dev, acm->out); 1553 } 1554 1555 return 0; 1556 alloc_fail6: 1557 if (acm->country_codes) { 1558 device_remove_file(&acm->control->dev, 1559 &dev_attr_wCountryCodes); 1560 device_remove_file(&acm->control->dev, 1561 &dev_attr_iCountryCodeRelDate); 1562 kfree(acm->country_codes); 1563 } 1564 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1565 alloc_fail5: 1566 usb_set_intfdata(intf, NULL); 1567 for (i = 0; i < ACM_NW; i++) 1568 usb_free_urb(acm->wb[i].urb); 1569 alloc_fail4: 1570 for (i = 0; i < num_rx_buf; i++) 1571 usb_free_urb(acm->read_urbs[i]); 1572 acm_read_buffers_free(acm); 1573 usb_free_urb(acm->ctrlurb); 1574 alloc_fail3: 1575 acm_write_buffers_free(acm); 1576 alloc_fail2: 1577 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1578 alloc_fail1: 1579 tty_port_put(&acm->port); 1580 alloc_fail: 1581 return rv; 1582 } 1583 1584 static void acm_disconnect(struct usb_interface *intf) 1585 { 1586 struct acm *acm = usb_get_intfdata(intf); 1587 struct tty_struct *tty; 1588 1589 /* sibling interface is already cleaning up */ 1590 if (!acm) 1591 return; 1592 1593 mutex_lock(&acm->mutex); 1594 acm->disconnected = true; 1595 if (acm->country_codes) { 1596 device_remove_file(&acm->control->dev, 1597 &dev_attr_wCountryCodes); 1598 device_remove_file(&acm->control->dev, 1599 &dev_attr_iCountryCodeRelDate); 1600 } 1601 wake_up_all(&acm->wioctl); 1602 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1603 usb_set_intfdata(acm->control, NULL); 1604 usb_set_intfdata(acm->data, NULL); 1605 mutex_unlock(&acm->mutex); 1606 1607 tty = tty_port_tty_get(&acm->port); 1608 if (tty) { 1609 tty_vhangup(tty); 1610 tty_kref_put(tty); 1611 } 1612 1613 acm_kill_urbs(acm); 1614 cancel_work_sync(&acm->work); 1615 1616 tty_unregister_device(acm_tty_driver, acm->minor); 1617 1618 acm_write_buffers_free(acm); 1619 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1620 acm_read_buffers_free(acm); 1621 1622 kfree(acm->notification_buffer); 1623 1624 if (!acm->combined_interfaces) 1625 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1626 acm->data : acm->control); 1627 1628 tty_port_put(&acm->port); 1629 } 1630 1631 #ifdef CONFIG_PM 1632 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1633 { 1634 struct acm *acm = usb_get_intfdata(intf); 1635 int cnt; 1636 1637 spin_lock_irq(&acm->write_lock); 1638 if (PMSG_IS_AUTO(message)) { 1639 if (acm->transmitting) { 1640 spin_unlock_irq(&acm->write_lock); 1641 return -EBUSY; 1642 } 1643 } 1644 cnt = acm->susp_count++; 1645 spin_unlock_irq(&acm->write_lock); 1646 1647 if (cnt) 1648 return 0; 1649 1650 acm_kill_urbs(acm); 1651 cancel_work_sync(&acm->work); 1652 1653 return 0; 1654 } 1655 1656 static int acm_resume(struct usb_interface *intf) 1657 { 1658 struct acm *acm = usb_get_intfdata(intf); 1659 struct urb *urb; 1660 int rv = 0; 1661 1662 spin_lock_irq(&acm->write_lock); 1663 1664 if (--acm->susp_count) 1665 goto out; 1666 1667 if (tty_port_initialized(&acm->port)) { 1668 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1669 1670 for (;;) { 1671 urb = usb_get_from_anchor(&acm->delayed); 1672 if (!urb) 1673 break; 1674 1675 acm_start_wb(acm, urb->context); 1676 } 1677 1678 /* 1679 * delayed error checking because we must 1680 * do the write path at all cost 1681 */ 1682 if (rv < 0) 1683 goto out; 1684 1685 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1686 } 1687 out: 1688 spin_unlock_irq(&acm->write_lock); 1689 1690 return rv; 1691 } 1692 1693 static int acm_reset_resume(struct usb_interface *intf) 1694 { 1695 struct acm *acm = usb_get_intfdata(intf); 1696 1697 if (tty_port_initialized(&acm->port)) 1698 tty_port_tty_hangup(&acm->port, false); 1699 1700 return acm_resume(intf); 1701 } 1702 1703 #endif /* CONFIG_PM */ 1704 1705 static int acm_pre_reset(struct usb_interface *intf) 1706 { 1707 struct acm *acm = usb_get_intfdata(intf); 1708 1709 clear_bit(EVENT_RX_STALL, &acm->flags); 1710 1711 return 0; 1712 } 1713 1714 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1715 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1716 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1717 USB_CDC_ACM_PROTO_VENDOR) 1718 1719 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1720 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1721 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1722 USB_CDC_ACM_PROTO_VENDOR) 1723 1724 /* 1725 * USB driver structure. 1726 */ 1727 1728 static const struct usb_device_id acm_ids[] = { 1729 /* quirky and broken devices */ 1730 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1731 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1732 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1733 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1734 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1735 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1736 }, 1737 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1738 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1739 }, 1740 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1741 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1742 }, 1743 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1744 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1745 }, 1746 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1747 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1748 }, 1749 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1750 .driver_info = SINGLE_RX_URB, 1751 }, 1752 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1753 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1754 }, 1755 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1756 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1757 }, 1758 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1759 .driver_info = SINGLE_RX_URB, 1760 }, 1761 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1762 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1763 }, 1764 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1765 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1766 }, 1767 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1768 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1769 }, 1770 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1771 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1772 }, 1773 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1774 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1775 }, 1776 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1777 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1778 }, 1779 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1780 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1781 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1782 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1783 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1784 }, 1785 /* Motorola H24 HSPA module: */ 1786 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1787 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1788 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1789 }, 1790 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1791 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1792 }, 1793 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1794 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1795 }, 1796 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1797 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1798 }, 1799 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1800 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1801 }, 1802 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1803 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1804 }, 1805 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1806 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1807 }, 1808 1809 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1810 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1811 data interface instead of 1812 communications interface. 1813 Maybe we should define a new 1814 quirk for this. */ 1815 }, 1816 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1817 .driver_info = NO_UNION_NORMAL, 1818 }, 1819 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1820 .driver_info = NO_UNION_NORMAL, 1821 }, 1822 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1823 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1824 }, 1825 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1826 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1827 }, 1828 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1829 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1830 }, 1831 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1832 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1833 }, 1834 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1835 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1836 }, 1837 1838 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1839 .driver_info = CLEAR_HALT_CONDITIONS, 1840 }, 1841 1842 /* Nokia S60 phones expose two ACM channels. The first is 1843 * a modem and is picked up by the standard AT-command 1844 * information below. The second is 'vendor-specific' but 1845 * is treated as a serial device at the S60 end, so we want 1846 * to expose it on Linux too. */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1888 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1889 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1890 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1891 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1892 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1893 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1894 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1895 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1896 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1897 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1898 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1899 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1900 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1901 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1902 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1903 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1904 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1905 1906 /* Support for Owen devices */ 1907 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1908 1909 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1910 1911 /* Support for Droids MuIn LCD */ 1912 { USB_DEVICE(0x04d8, 0x000b), 1913 .driver_info = NO_DATA_INTERFACE, 1914 }, 1915 1916 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1917 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1918 .driver_info = IGNORE_DEVICE, 1919 }, 1920 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1921 .driver_info = IGNORE_DEVICE, 1922 }, 1923 #endif 1924 1925 /*Samsung phone in firmware update mode */ 1926 { USB_DEVICE(0x04e8, 0x685d), 1927 .driver_info = IGNORE_DEVICE, 1928 }, 1929 1930 /* Exclude Infineon Flash Loader utility */ 1931 { USB_DEVICE(0x058b, 0x0041), 1932 .driver_info = IGNORE_DEVICE, 1933 }, 1934 1935 /* control interfaces without any protocol set */ 1936 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1937 USB_CDC_PROTO_NONE) }, 1938 1939 /* control interfaces with various AT-command sets */ 1940 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1941 USB_CDC_ACM_PROTO_AT_V25TER) }, 1942 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1943 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1944 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1945 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1946 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1947 USB_CDC_ACM_PROTO_AT_GSM) }, 1948 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1949 USB_CDC_ACM_PROTO_AT_3G) }, 1950 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1951 USB_CDC_ACM_PROTO_AT_CDMA) }, 1952 1953 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1954 .driver_info = SEND_ZERO_PACKET, 1955 }, 1956 1957 { } 1958 }; 1959 1960 MODULE_DEVICE_TABLE(usb, acm_ids); 1961 1962 static struct usb_driver acm_driver = { 1963 .name = "cdc_acm", 1964 .probe = acm_probe, 1965 .disconnect = acm_disconnect, 1966 #ifdef CONFIG_PM 1967 .suspend = acm_suspend, 1968 .resume = acm_resume, 1969 .reset_resume = acm_reset_resume, 1970 #endif 1971 .pre_reset = acm_pre_reset, 1972 .id_table = acm_ids, 1973 #ifdef CONFIG_PM 1974 .supports_autosuspend = 1, 1975 #endif 1976 .disable_hub_initiated_lpm = 1, 1977 }; 1978 1979 /* 1980 * TTY driver structures. 1981 */ 1982 1983 static const struct tty_operations acm_ops = { 1984 .install = acm_tty_install, 1985 .open = acm_tty_open, 1986 .close = acm_tty_close, 1987 .cleanup = acm_tty_cleanup, 1988 .hangup = acm_tty_hangup, 1989 .write = acm_tty_write, 1990 .put_char = acm_tty_put_char, 1991 .flush_chars = acm_tty_flush_chars, 1992 .write_room = acm_tty_write_room, 1993 .ioctl = acm_tty_ioctl, 1994 .throttle = acm_tty_throttle, 1995 .unthrottle = acm_tty_unthrottle, 1996 .chars_in_buffer = acm_tty_chars_in_buffer, 1997 .break_ctl = acm_tty_break_ctl, 1998 .set_termios = acm_tty_set_termios, 1999 .tiocmget = acm_tty_tiocmget, 2000 .tiocmset = acm_tty_tiocmset, 2001 .get_icount = acm_tty_get_icount, 2002 }; 2003 2004 /* 2005 * Init / exit. 2006 */ 2007 2008 static int __init acm_init(void) 2009 { 2010 int retval; 2011 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 2012 if (!acm_tty_driver) 2013 return -ENOMEM; 2014 acm_tty_driver->driver_name = "acm", 2015 acm_tty_driver->name = "ttyACM", 2016 acm_tty_driver->major = ACM_TTY_MAJOR, 2017 acm_tty_driver->minor_start = 0, 2018 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2019 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2020 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2021 acm_tty_driver->init_termios = tty_std_termios; 2022 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2023 HUPCL | CLOCAL; 2024 tty_set_operations(acm_tty_driver, &acm_ops); 2025 2026 retval = tty_register_driver(acm_tty_driver); 2027 if (retval) { 2028 put_tty_driver(acm_tty_driver); 2029 return retval; 2030 } 2031 2032 retval = usb_register(&acm_driver); 2033 if (retval) { 2034 tty_unregister_driver(acm_tty_driver); 2035 put_tty_driver(acm_tty_driver); 2036 return retval; 2037 } 2038 2039 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2040 2041 return 0; 2042 } 2043 2044 static void __exit acm_exit(void) 2045 { 2046 usb_deregister(&acm_driver); 2047 tty_unregister_driver(acm_tty_driver); 2048 put_tty_driver(acm_tty_driver); 2049 idr_destroy(&acm_minors); 2050 } 2051 2052 module_init(acm_init); 2053 module_exit(acm_exit); 2054 2055 MODULE_AUTHOR(DRIVER_AUTHOR); 2056 MODULE_DESCRIPTION(DRIVER_DESC); 2057 MODULE_LICENSE("GPL"); 2058 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2059