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 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 280 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 281 282 switch (dr->bNotificationType) { 283 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 284 dev_dbg(&acm->control->dev, 285 "%s - network connection: %d\n", __func__, dr->wValue); 286 break; 287 288 case USB_CDC_NOTIFY_SERIAL_STATE: 289 if (le16_to_cpu(dr->wLength) != 2) { 290 dev_dbg(&acm->control->dev, 291 "%s - malformed serial state\n", __func__); 292 break; 293 } 294 295 newctrl = get_unaligned_le16(data); 296 dev_dbg(&acm->control->dev, 297 "%s - serial state: 0x%x\n", __func__, newctrl); 298 299 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 300 dev_dbg(&acm->control->dev, 301 "%s - calling hangup\n", __func__); 302 tty_port_tty_hangup(&acm->port, false); 303 } 304 305 difference = acm->ctrlin ^ newctrl; 306 spin_lock(&acm->read_lock); 307 acm->ctrlin = newctrl; 308 acm->oldcount = acm->iocount; 309 310 if (difference & ACM_CTRL_DSR) 311 acm->iocount.dsr++; 312 if (difference & ACM_CTRL_BRK) 313 acm->iocount.brk++; 314 if (difference & ACM_CTRL_RI) 315 acm->iocount.rng++; 316 if (difference & ACM_CTRL_DCD) 317 acm->iocount.dcd++; 318 if (difference & ACM_CTRL_FRAMING) 319 acm->iocount.frame++; 320 if (difference & ACM_CTRL_PARITY) 321 acm->iocount.parity++; 322 if (difference & ACM_CTRL_OVERRUN) 323 acm->iocount.overrun++; 324 spin_unlock(&acm->read_lock); 325 326 if (difference) 327 wake_up_all(&acm->wioctl); 328 329 break; 330 331 default: 332 dev_dbg(&acm->control->dev, 333 "%s - unknown notification %d received: index %d len %d\n", 334 __func__, 335 dr->bNotificationType, dr->wIndex, dr->wLength); 336 } 337 } 338 339 /* control interface reports status changes with "interrupt" transfers */ 340 static void acm_ctrl_irq(struct urb *urb) 341 { 342 struct acm *acm = urb->context; 343 struct usb_cdc_notification *dr = urb->transfer_buffer; 344 unsigned int current_size = urb->actual_length; 345 unsigned int expected_size, copy_size, alloc_size; 346 int retval; 347 int status = urb->status; 348 349 switch (status) { 350 case 0: 351 /* success */ 352 break; 353 case -ECONNRESET: 354 case -ENOENT: 355 case -ESHUTDOWN: 356 /* this urb is terminated, clean up */ 357 acm->nb_index = 0; 358 dev_dbg(&acm->control->dev, 359 "%s - urb shutting down with status: %d\n", 360 __func__, status); 361 return; 362 default: 363 dev_dbg(&acm->control->dev, 364 "%s - nonzero urb status received: %d\n", 365 __func__, status); 366 goto exit; 367 } 368 369 usb_mark_last_busy(acm->dev); 370 371 if (acm->nb_index) 372 dr = (struct usb_cdc_notification *)acm->notification_buffer; 373 374 /* size = notification-header + (optional) data */ 375 expected_size = sizeof(struct usb_cdc_notification) + 376 le16_to_cpu(dr->wLength); 377 378 if (current_size < expected_size) { 379 /* notification is transmitted fragmented, reassemble */ 380 if (acm->nb_size < expected_size) { 381 if (acm->nb_size) { 382 kfree(acm->notification_buffer); 383 acm->nb_size = 0; 384 } 385 alloc_size = roundup_pow_of_two(expected_size); 386 /* 387 * kmalloc ensures a valid notification_buffer after a 388 * use of kfree in case the previous allocation was too 389 * small. Final freeing is done on disconnect. 390 */ 391 acm->notification_buffer = 392 kmalloc(alloc_size, GFP_ATOMIC); 393 if (!acm->notification_buffer) 394 goto exit; 395 acm->nb_size = alloc_size; 396 } 397 398 copy_size = min(current_size, 399 expected_size - acm->nb_index); 400 401 memcpy(&acm->notification_buffer[acm->nb_index], 402 urb->transfer_buffer, copy_size); 403 acm->nb_index += copy_size; 404 current_size = acm->nb_index; 405 } 406 407 if (current_size >= expected_size) { 408 /* notification complete */ 409 acm_process_notification(acm, (unsigned char *)dr); 410 acm->nb_index = 0; 411 } 412 413 exit: 414 retval = usb_submit_urb(urb, GFP_ATOMIC); 415 if (retval && retval != -EPERM) 416 dev_err(&acm->control->dev, 417 "%s - usb_submit_urb failed: %d\n", __func__, retval); 418 } 419 420 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 421 { 422 int res; 423 424 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 425 return 0; 426 427 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 428 if (res) { 429 if (res != -EPERM && res != -ENODEV) { 430 dev_err(&acm->data->dev, 431 "urb %d failed submission with %d\n", 432 index, res); 433 } 434 set_bit(index, &acm->read_urbs_free); 435 return res; 436 } else { 437 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 438 } 439 440 return 0; 441 } 442 443 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 444 { 445 int res; 446 int i; 447 448 for (i = 0; i < acm->rx_buflimit; ++i) { 449 res = acm_submit_read_urb(acm, i, mem_flags); 450 if (res) 451 return res; 452 } 453 454 return 0; 455 } 456 457 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 458 { 459 if (!urb->actual_length) 460 return; 461 462 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 463 urb->actual_length); 464 tty_flip_buffer_push(&acm->port); 465 } 466 467 static void acm_read_bulk_callback(struct urb *urb) 468 { 469 struct acm_rb *rb = urb->context; 470 struct acm *acm = rb->instance; 471 unsigned long flags; 472 int status = urb->status; 473 474 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 475 rb->index, urb->actual_length, status); 476 477 set_bit(rb->index, &acm->read_urbs_free); 478 479 if (!acm->dev) { 480 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 481 return; 482 } 483 484 switch (status) { 485 case 0: 486 usb_mark_last_busy(acm->dev); 487 acm_process_read_urb(acm, urb); 488 break; 489 case -EPIPE: 490 set_bit(EVENT_RX_STALL, &acm->flags); 491 schedule_work(&acm->work); 492 return; 493 case -ENOENT: 494 case -ECONNRESET: 495 case -ESHUTDOWN: 496 dev_dbg(&acm->data->dev, 497 "%s - urb shutting down with status: %d\n", 498 __func__, status); 499 return; 500 default: 501 dev_dbg(&acm->data->dev, 502 "%s - nonzero urb status received: %d\n", 503 __func__, status); 504 break; 505 } 506 507 /* 508 * Unthrottle may run on another CPU which needs to see events 509 * in the same order. Submission has an implict barrier 510 */ 511 smp_mb__before_atomic(); 512 513 /* throttle device if requested by tty */ 514 spin_lock_irqsave(&acm->read_lock, flags); 515 acm->throttled = acm->throttle_req; 516 if (!acm->throttled) { 517 spin_unlock_irqrestore(&acm->read_lock, flags); 518 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 519 } else { 520 spin_unlock_irqrestore(&acm->read_lock, flags); 521 } 522 } 523 524 /* data interface wrote those outgoing bytes */ 525 static void acm_write_bulk(struct urb *urb) 526 { 527 struct acm_wb *wb = urb->context; 528 struct acm *acm = wb->instance; 529 unsigned long flags; 530 int status = urb->status; 531 532 if (status || (urb->actual_length != urb->transfer_buffer_length)) 533 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 534 urb->actual_length, 535 urb->transfer_buffer_length, 536 status); 537 538 spin_lock_irqsave(&acm->write_lock, flags); 539 acm_write_done(acm, wb); 540 spin_unlock_irqrestore(&acm->write_lock, flags); 541 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 542 schedule_work(&acm->work); 543 } 544 545 static void acm_softint(struct work_struct *work) 546 { 547 int i; 548 struct acm *acm = container_of(work, struct acm, work); 549 550 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 551 if (!(usb_autopm_get_interface(acm->data))) { 552 for (i = 0; i < acm->rx_buflimit; i++) 553 usb_kill_urb(acm->read_urbs[i]); 554 usb_clear_halt(acm->dev, acm->in); 555 acm_submit_read_urbs(acm, GFP_KERNEL); 556 usb_autopm_put_interface(acm->data); 557 } 558 clear_bit(EVENT_RX_STALL, &acm->flags); 559 } 560 561 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) { 562 tty_port_tty_wakeup(&acm->port); 563 clear_bit(EVENT_TTY_WAKEUP, &acm->flags); 564 } 565 } 566 567 /* 568 * TTY handlers 569 */ 570 571 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 572 { 573 struct acm *acm; 574 int retval; 575 576 acm = acm_get_by_minor(tty->index); 577 if (!acm) 578 return -ENODEV; 579 580 retval = tty_standard_install(driver, tty); 581 if (retval) 582 goto error_init_termios; 583 584 tty->driver_data = acm; 585 586 return 0; 587 588 error_init_termios: 589 tty_port_put(&acm->port); 590 return retval; 591 } 592 593 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 594 { 595 struct acm *acm = tty->driver_data; 596 597 return tty_port_open(&acm->port, tty, filp); 598 } 599 600 static void acm_port_dtr_rts(struct tty_port *port, int raise) 601 { 602 struct acm *acm = container_of(port, struct acm, port); 603 int val; 604 int res; 605 606 if (raise) 607 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 608 else 609 val = 0; 610 611 /* FIXME: add missing ctrlout locking throughout driver */ 612 acm->ctrlout = val; 613 614 res = acm_set_control(acm, val); 615 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 616 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 617 } 618 619 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 620 { 621 struct acm *acm = container_of(port, struct acm, port); 622 int retval = -ENODEV; 623 int i; 624 625 mutex_lock(&acm->mutex); 626 if (acm->disconnected) 627 goto disconnected; 628 629 retval = usb_autopm_get_interface(acm->control); 630 if (retval) 631 goto error_get_interface; 632 633 /* 634 * FIXME: Why do we need this? Allocating 64K of physically contiguous 635 * memory is really nasty... 636 */ 637 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 638 acm->control->needs_remote_wakeup = 1; 639 640 acm->ctrlurb->dev = acm->dev; 641 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 642 if (retval) { 643 dev_err(&acm->control->dev, 644 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 645 goto error_submit_urb; 646 } 647 648 acm_tty_set_termios(tty, NULL); 649 650 /* 651 * Unthrottle device in case the TTY was closed while throttled. 652 */ 653 spin_lock_irq(&acm->read_lock); 654 acm->throttled = 0; 655 acm->throttle_req = 0; 656 spin_unlock_irq(&acm->read_lock); 657 658 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 659 if (retval) 660 goto error_submit_read_urbs; 661 662 usb_autopm_put_interface(acm->control); 663 664 mutex_unlock(&acm->mutex); 665 666 return 0; 667 668 error_submit_read_urbs: 669 for (i = 0; i < acm->rx_buflimit; i++) 670 usb_kill_urb(acm->read_urbs[i]); 671 usb_kill_urb(acm->ctrlurb); 672 error_submit_urb: 673 usb_autopm_put_interface(acm->control); 674 error_get_interface: 675 disconnected: 676 mutex_unlock(&acm->mutex); 677 678 return usb_translate_errors(retval); 679 } 680 681 static void acm_port_destruct(struct tty_port *port) 682 { 683 struct acm *acm = container_of(port, struct acm, port); 684 685 acm_release_minor(acm); 686 usb_put_intf(acm->control); 687 kfree(acm->country_codes); 688 kfree(acm); 689 } 690 691 static void acm_port_shutdown(struct tty_port *port) 692 { 693 struct acm *acm = container_of(port, struct acm, port); 694 struct urb *urb; 695 struct acm_wb *wb; 696 697 /* 698 * Need to grab write_lock to prevent race with resume, but no need to 699 * hold it due to the tty-port initialised flag. 700 */ 701 spin_lock_irq(&acm->write_lock); 702 spin_unlock_irq(&acm->write_lock); 703 704 usb_autopm_get_interface_no_resume(acm->control); 705 acm->control->needs_remote_wakeup = 0; 706 usb_autopm_put_interface(acm->control); 707 708 for (;;) { 709 urb = usb_get_from_anchor(&acm->delayed); 710 if (!urb) 711 break; 712 wb = urb->context; 713 wb->use = 0; 714 usb_autopm_put_interface_async(acm->control); 715 } 716 717 acm_kill_urbs(acm); 718 } 719 720 static void acm_tty_cleanup(struct tty_struct *tty) 721 { 722 struct acm *acm = tty->driver_data; 723 724 tty_port_put(&acm->port); 725 } 726 727 static void acm_tty_hangup(struct tty_struct *tty) 728 { 729 struct acm *acm = tty->driver_data; 730 731 tty_port_hangup(&acm->port); 732 } 733 734 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 735 { 736 struct acm *acm = tty->driver_data; 737 738 tty_port_close(&acm->port, tty, filp); 739 } 740 741 static int acm_tty_write(struct tty_struct *tty, 742 const unsigned char *buf, int count) 743 { 744 struct acm *acm = tty->driver_data; 745 int stat; 746 unsigned long flags; 747 int wbn; 748 struct acm_wb *wb; 749 750 if (!count) 751 return 0; 752 753 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 754 755 spin_lock_irqsave(&acm->write_lock, flags); 756 wbn = acm_wb_alloc(acm); 757 if (wbn < 0) { 758 spin_unlock_irqrestore(&acm->write_lock, flags); 759 return 0; 760 } 761 wb = &acm->wb[wbn]; 762 763 if (!acm->dev) { 764 wb->use = 0; 765 spin_unlock_irqrestore(&acm->write_lock, flags); 766 return -ENODEV; 767 } 768 769 count = (count > acm->writesize) ? acm->writesize : count; 770 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 771 memcpy(wb->buf, buf, count); 772 wb->len = count; 773 774 stat = usb_autopm_get_interface_async(acm->control); 775 if (stat) { 776 wb->use = 0; 777 spin_unlock_irqrestore(&acm->write_lock, flags); 778 return stat; 779 } 780 781 if (acm->susp_count) { 782 if (acm->putbuffer) { 783 /* now to preserve order */ 784 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed); 785 acm->putbuffer = NULL; 786 } 787 usb_anchor_urb(wb->urb, &acm->delayed); 788 spin_unlock_irqrestore(&acm->write_lock, flags); 789 return count; 790 } else { 791 if (acm->putbuffer) { 792 /* at this point there is no good way to handle errors */ 793 acm_start_wb(acm, acm->putbuffer); 794 acm->putbuffer = NULL; 795 } 796 } 797 798 stat = acm_start_wb(acm, wb); 799 spin_unlock_irqrestore(&acm->write_lock, flags); 800 801 if (stat < 0) 802 return stat; 803 return count; 804 } 805 806 static void acm_tty_flush_chars(struct tty_struct *tty) 807 { 808 struct acm *acm = tty->driver_data; 809 struct acm_wb *cur; 810 int err; 811 unsigned long flags; 812 813 spin_lock_irqsave(&acm->write_lock, flags); 814 815 cur = acm->putbuffer; 816 if (!cur) /* nothing to do */ 817 goto out; 818 819 acm->putbuffer = NULL; 820 err = usb_autopm_get_interface_async(acm->control); 821 if (err < 0) { 822 cur->use = 0; 823 acm->putbuffer = cur; 824 goto out; 825 } 826 827 if (acm->susp_count) 828 usb_anchor_urb(cur->urb, &acm->delayed); 829 else 830 acm_start_wb(acm, cur); 831 out: 832 spin_unlock_irqrestore(&acm->write_lock, flags); 833 return; 834 } 835 836 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch) 837 { 838 struct acm *acm = tty->driver_data; 839 struct acm_wb *cur; 840 int wbn; 841 unsigned long flags; 842 843 overflow: 844 cur = acm->putbuffer; 845 if (!cur) { 846 spin_lock_irqsave(&acm->write_lock, flags); 847 wbn = acm_wb_alloc(acm); 848 if (wbn >= 0) { 849 cur = &acm->wb[wbn]; 850 acm->putbuffer = cur; 851 } 852 spin_unlock_irqrestore(&acm->write_lock, flags); 853 if (!cur) 854 return 0; 855 } 856 857 if (cur->len == acm->writesize) { 858 acm_tty_flush_chars(tty); 859 goto overflow; 860 } 861 862 cur->buf[cur->len++] = ch; 863 return 1; 864 } 865 866 static int acm_tty_write_room(struct tty_struct *tty) 867 { 868 struct acm *acm = tty->driver_data; 869 /* 870 * Do not let the line discipline to know that we have a reserve, 871 * or it might get too enthusiastic. 872 */ 873 return acm_wb_is_avail(acm) ? acm->writesize : 0; 874 } 875 876 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 877 { 878 struct acm *acm = tty->driver_data; 879 /* 880 * if the device was unplugged then any remaining characters fell out 881 * of the connector ;) 882 */ 883 if (acm->disconnected) 884 return 0; 885 /* 886 * This is inaccurate (overcounts), but it works. 887 */ 888 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 889 } 890 891 static void acm_tty_throttle(struct tty_struct *tty) 892 { 893 struct acm *acm = tty->driver_data; 894 895 spin_lock_irq(&acm->read_lock); 896 acm->throttle_req = 1; 897 spin_unlock_irq(&acm->read_lock); 898 } 899 900 static void acm_tty_unthrottle(struct tty_struct *tty) 901 { 902 struct acm *acm = tty->driver_data; 903 unsigned int was_throttled; 904 905 spin_lock_irq(&acm->read_lock); 906 was_throttled = acm->throttled; 907 acm->throttled = 0; 908 acm->throttle_req = 0; 909 spin_unlock_irq(&acm->read_lock); 910 911 if (was_throttled) 912 acm_submit_read_urbs(acm, GFP_KERNEL); 913 } 914 915 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 916 { 917 struct acm *acm = tty->driver_data; 918 int retval; 919 920 retval = acm_send_break(acm, state ? 0xffff : 0); 921 if (retval < 0) 922 dev_dbg(&acm->control->dev, 923 "%s - send break failed\n", __func__); 924 return retval; 925 } 926 927 static int acm_tty_tiocmget(struct tty_struct *tty) 928 { 929 struct acm *acm = tty->driver_data; 930 931 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 932 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 933 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 934 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 935 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 936 TIOCM_CTS; 937 } 938 939 static int acm_tty_tiocmset(struct tty_struct *tty, 940 unsigned int set, unsigned int clear) 941 { 942 struct acm *acm = tty->driver_data; 943 unsigned int newctrl; 944 945 newctrl = acm->ctrlout; 946 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 947 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 948 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 949 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 950 951 newctrl = (newctrl & ~clear) | set; 952 953 if (acm->ctrlout == newctrl) 954 return 0; 955 return acm_set_control(acm, acm->ctrlout = newctrl); 956 } 957 958 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 959 { 960 struct serial_struct tmp; 961 962 memset(&tmp, 0, sizeof(tmp)); 963 tmp.xmit_fifo_size = acm->writesize; 964 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 965 tmp.close_delay = acm->port.close_delay / 10; 966 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 967 ASYNC_CLOSING_WAIT_NONE : 968 acm->port.closing_wait / 10; 969 970 if (copy_to_user(info, &tmp, sizeof(tmp))) 971 return -EFAULT; 972 else 973 return 0; 974 } 975 976 static int set_serial_info(struct acm *acm, 977 struct serial_struct __user *newinfo) 978 { 979 struct serial_struct new_serial; 980 unsigned int closing_wait, close_delay; 981 int retval = 0; 982 983 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 984 return -EFAULT; 985 986 close_delay = new_serial.close_delay * 10; 987 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 988 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 989 990 mutex_lock(&acm->port.mutex); 991 992 if (!capable(CAP_SYS_ADMIN)) { 993 if ((close_delay != acm->port.close_delay) || 994 (closing_wait != acm->port.closing_wait)) 995 retval = -EPERM; 996 else 997 retval = -EOPNOTSUPP; 998 } else { 999 acm->port.close_delay = close_delay; 1000 acm->port.closing_wait = closing_wait; 1001 } 1002 1003 mutex_unlock(&acm->port.mutex); 1004 return retval; 1005 } 1006 1007 static int wait_serial_change(struct acm *acm, unsigned long arg) 1008 { 1009 int rv = 0; 1010 DECLARE_WAITQUEUE(wait, current); 1011 struct async_icount old, new; 1012 1013 do { 1014 spin_lock_irq(&acm->read_lock); 1015 old = acm->oldcount; 1016 new = acm->iocount; 1017 acm->oldcount = new; 1018 spin_unlock_irq(&acm->read_lock); 1019 1020 if ((arg & TIOCM_DSR) && 1021 old.dsr != new.dsr) 1022 break; 1023 if ((arg & TIOCM_CD) && 1024 old.dcd != new.dcd) 1025 break; 1026 if ((arg & TIOCM_RI) && 1027 old.rng != new.rng) 1028 break; 1029 1030 add_wait_queue(&acm->wioctl, &wait); 1031 set_current_state(TASK_INTERRUPTIBLE); 1032 schedule(); 1033 remove_wait_queue(&acm->wioctl, &wait); 1034 if (acm->disconnected) { 1035 if (arg & TIOCM_CD) 1036 break; 1037 else 1038 rv = -ENODEV; 1039 } else { 1040 if (signal_pending(current)) 1041 rv = -ERESTARTSYS; 1042 } 1043 } while (!rv); 1044 1045 1046 1047 return rv; 1048 } 1049 1050 static int acm_tty_get_icount(struct tty_struct *tty, 1051 struct serial_icounter_struct *icount) 1052 { 1053 struct acm *acm = tty->driver_data; 1054 1055 icount->dsr = acm->iocount.dsr; 1056 icount->rng = acm->iocount.rng; 1057 icount->dcd = acm->iocount.dcd; 1058 icount->frame = acm->iocount.frame; 1059 icount->overrun = acm->iocount.overrun; 1060 icount->parity = acm->iocount.parity; 1061 icount->brk = acm->iocount.brk; 1062 1063 return 0; 1064 } 1065 1066 static int acm_tty_ioctl(struct tty_struct *tty, 1067 unsigned int cmd, unsigned long arg) 1068 { 1069 struct acm *acm = tty->driver_data; 1070 int rv = -ENOIOCTLCMD; 1071 1072 switch (cmd) { 1073 case TIOCGSERIAL: /* gets serial port data */ 1074 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 1075 break; 1076 case TIOCSSERIAL: 1077 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 1078 break; 1079 case TIOCMIWAIT: 1080 rv = usb_autopm_get_interface(acm->control); 1081 if (rv < 0) { 1082 rv = -EIO; 1083 break; 1084 } 1085 rv = wait_serial_change(acm, arg); 1086 usb_autopm_put_interface(acm->control); 1087 break; 1088 } 1089 1090 return rv; 1091 } 1092 1093 static void acm_tty_set_termios(struct tty_struct *tty, 1094 struct ktermios *termios_old) 1095 { 1096 struct acm *acm = tty->driver_data; 1097 struct ktermios *termios = &tty->termios; 1098 struct usb_cdc_line_coding newline; 1099 int newctrl = acm->ctrlout; 1100 1101 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1102 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1103 newline.bParityType = termios->c_cflag & PARENB ? 1104 (termios->c_cflag & PARODD ? 1 : 2) + 1105 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1106 switch (termios->c_cflag & CSIZE) { 1107 case CS5: 1108 newline.bDataBits = 5; 1109 break; 1110 case CS6: 1111 newline.bDataBits = 6; 1112 break; 1113 case CS7: 1114 newline.bDataBits = 7; 1115 break; 1116 case CS8: 1117 default: 1118 newline.bDataBits = 8; 1119 break; 1120 } 1121 /* FIXME: Needs to clear unsupported bits in the termios */ 1122 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1123 1124 if (C_BAUD(tty) == B0) { 1125 newline.dwDTERate = acm->line.dwDTERate; 1126 newctrl &= ~ACM_CTRL_DTR; 1127 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1128 newctrl |= ACM_CTRL_DTR; 1129 } 1130 1131 if (newctrl != acm->ctrlout) 1132 acm_set_control(acm, acm->ctrlout = newctrl); 1133 1134 if (memcmp(&acm->line, &newline, sizeof newline)) { 1135 memcpy(&acm->line, &newline, sizeof newline); 1136 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1137 __func__, 1138 le32_to_cpu(newline.dwDTERate), 1139 newline.bCharFormat, newline.bParityType, 1140 newline.bDataBits); 1141 acm_set_line(acm, &acm->line); 1142 } 1143 } 1144 1145 static const struct tty_port_operations acm_port_ops = { 1146 .dtr_rts = acm_port_dtr_rts, 1147 .shutdown = acm_port_shutdown, 1148 .activate = acm_port_activate, 1149 .destruct = acm_port_destruct, 1150 }; 1151 1152 /* 1153 * USB probe and disconnect routines. 1154 */ 1155 1156 /* Little helpers: write/read buffers free */ 1157 static void acm_write_buffers_free(struct acm *acm) 1158 { 1159 int i; 1160 struct acm_wb *wb; 1161 1162 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1163 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1164 } 1165 1166 static void acm_read_buffers_free(struct acm *acm) 1167 { 1168 int i; 1169 1170 for (i = 0; i < acm->rx_buflimit; i++) 1171 usb_free_coherent(acm->dev, acm->readsize, 1172 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1173 } 1174 1175 /* Little helper: write buffers allocate */ 1176 static int acm_write_buffers_alloc(struct acm *acm) 1177 { 1178 int i; 1179 struct acm_wb *wb; 1180 1181 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1182 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1183 &wb->dmah); 1184 if (!wb->buf) { 1185 while (i != 0) { 1186 --i; 1187 --wb; 1188 usb_free_coherent(acm->dev, acm->writesize, 1189 wb->buf, wb->dmah); 1190 } 1191 return -ENOMEM; 1192 } 1193 } 1194 return 0; 1195 } 1196 1197 static int acm_probe(struct usb_interface *intf, 1198 const struct usb_device_id *id) 1199 { 1200 struct usb_cdc_union_desc *union_header = NULL; 1201 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1202 unsigned char *buffer = intf->altsetting->extra; 1203 int buflen = intf->altsetting->extralen; 1204 struct usb_interface *control_interface; 1205 struct usb_interface *data_interface; 1206 struct usb_endpoint_descriptor *epctrl = NULL; 1207 struct usb_endpoint_descriptor *epread = NULL; 1208 struct usb_endpoint_descriptor *epwrite = NULL; 1209 struct usb_device *usb_dev = interface_to_usbdev(intf); 1210 struct usb_cdc_parsed_header h; 1211 struct acm *acm; 1212 int minor; 1213 int ctrlsize, readsize; 1214 u8 *buf; 1215 int call_intf_num = -1; 1216 int data_intf_num = -1; 1217 unsigned long quirks; 1218 int num_rx_buf; 1219 int i; 1220 int combined_interfaces = 0; 1221 struct device *tty_dev; 1222 int rv = -ENOMEM; 1223 int res; 1224 1225 /* normal quirks */ 1226 quirks = (unsigned long)id->driver_info; 1227 1228 if (quirks == IGNORE_DEVICE) 1229 return -ENODEV; 1230 1231 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1232 1233 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1234 1235 /* handle quirks deadly to normal probing*/ 1236 if (quirks == NO_UNION_NORMAL) { 1237 data_interface = usb_ifnum_to_if(usb_dev, 1); 1238 control_interface = usb_ifnum_to_if(usb_dev, 0); 1239 /* we would crash */ 1240 if (!data_interface || !control_interface) 1241 return -ENODEV; 1242 goto skip_normal_probe; 1243 } 1244 1245 /* normal probing*/ 1246 if (!buffer) { 1247 dev_err(&intf->dev, "Weird descriptor references\n"); 1248 return -EINVAL; 1249 } 1250 1251 if (!intf->cur_altsetting) 1252 return -EINVAL; 1253 1254 if (!buflen) { 1255 if (intf->cur_altsetting->endpoint && 1256 intf->cur_altsetting->endpoint->extralen && 1257 intf->cur_altsetting->endpoint->extra) { 1258 dev_dbg(&intf->dev, 1259 "Seeking extra descriptors on endpoint\n"); 1260 buflen = intf->cur_altsetting->endpoint->extralen; 1261 buffer = intf->cur_altsetting->endpoint->extra; 1262 } else { 1263 dev_err(&intf->dev, 1264 "Zero length descriptor references\n"); 1265 return -EINVAL; 1266 } 1267 } 1268 1269 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1270 union_header = h.usb_cdc_union_desc; 1271 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1272 if (cmgmd) 1273 call_intf_num = cmgmd->bDataInterface; 1274 1275 if (!union_header) { 1276 if (call_intf_num > 0) { 1277 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1278 /* quirks for Droids MuIn LCD */ 1279 if (quirks & NO_DATA_INTERFACE) { 1280 data_interface = usb_ifnum_to_if(usb_dev, 0); 1281 } else { 1282 data_intf_num = call_intf_num; 1283 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1284 } 1285 control_interface = intf; 1286 } else { 1287 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1288 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1289 return -ENODEV; 1290 } else { 1291 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1292 combined_interfaces = 1; 1293 control_interface = data_interface = intf; 1294 goto look_for_collapsed_interface; 1295 } 1296 } 1297 } else { 1298 data_intf_num = union_header->bSlaveInterface0; 1299 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1300 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1301 } 1302 1303 if (!control_interface || !data_interface) { 1304 dev_dbg(&intf->dev, "no interfaces\n"); 1305 return -ENODEV; 1306 } 1307 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1308 return -ENODEV; 1309 1310 if (data_intf_num != call_intf_num) 1311 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1312 1313 if (control_interface == data_interface) { 1314 /* some broken devices designed for windows work this way */ 1315 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1316 combined_interfaces = 1; 1317 /* a popular other OS doesn't use it */ 1318 quirks |= NO_CAP_LINE; 1319 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1320 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1321 return -EINVAL; 1322 } 1323 look_for_collapsed_interface: 1324 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1325 &epread, &epwrite, &epctrl, NULL); 1326 if (res) 1327 return res; 1328 1329 goto made_compressed_probe; 1330 } 1331 1332 skip_normal_probe: 1333 1334 /*workaround for switched interfaces */ 1335 if (data_interface->cur_altsetting->desc.bInterfaceClass 1336 != CDC_DATA_INTERFACE_TYPE) { 1337 if (control_interface->cur_altsetting->desc.bInterfaceClass 1338 == CDC_DATA_INTERFACE_TYPE) { 1339 dev_dbg(&intf->dev, 1340 "Your device has switched interfaces.\n"); 1341 swap(control_interface, data_interface); 1342 } else { 1343 return -EINVAL; 1344 } 1345 } 1346 1347 /* Accept probe requests only for the control interface */ 1348 if (!combined_interfaces && intf != control_interface) 1349 return -ENODEV; 1350 1351 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1352 /* valid in this context */ 1353 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1354 return -EBUSY; 1355 } 1356 1357 1358 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1359 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1360 return -EINVAL; 1361 1362 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1363 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1364 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1365 1366 1367 /* workaround for switched endpoints */ 1368 if (!usb_endpoint_dir_in(epread)) { 1369 /* descriptors are swapped */ 1370 dev_dbg(&intf->dev, 1371 "The data interface has switched endpoints\n"); 1372 swap(epread, epwrite); 1373 } 1374 made_compressed_probe: 1375 dev_dbg(&intf->dev, "interfaces are valid\n"); 1376 1377 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1378 if (acm == NULL) 1379 goto alloc_fail; 1380 1381 minor = acm_alloc_minor(acm); 1382 if (minor < 0) 1383 goto alloc_fail1; 1384 1385 ctrlsize = usb_endpoint_maxp(epctrl); 1386 readsize = usb_endpoint_maxp(epread) * 1387 (quirks == SINGLE_RX_URB ? 1 : 2); 1388 acm->combined_interfaces = combined_interfaces; 1389 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1390 acm->control = control_interface; 1391 acm->data = data_interface; 1392 acm->minor = minor; 1393 acm->dev = usb_dev; 1394 if (h.usb_cdc_acm_descriptor) 1395 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1396 if (quirks & NO_CAP_LINE) 1397 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1398 acm->ctrlsize = ctrlsize; 1399 acm->readsize = readsize; 1400 acm->rx_buflimit = num_rx_buf; 1401 INIT_WORK(&acm->work, acm_softint); 1402 init_waitqueue_head(&acm->wioctl); 1403 spin_lock_init(&acm->write_lock); 1404 spin_lock_init(&acm->read_lock); 1405 mutex_init(&acm->mutex); 1406 if (usb_endpoint_xfer_int(epread)) { 1407 acm->bInterval = epread->bInterval; 1408 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1409 } else { 1410 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1411 } 1412 if (usb_endpoint_xfer_int(epwrite)) 1413 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1414 else 1415 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1416 tty_port_init(&acm->port); 1417 acm->port.ops = &acm_port_ops; 1418 init_usb_anchor(&acm->delayed); 1419 acm->quirks = quirks; 1420 1421 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1422 if (!buf) 1423 goto alloc_fail2; 1424 acm->ctrl_buffer = buf; 1425 1426 if (acm_write_buffers_alloc(acm) < 0) 1427 goto alloc_fail4; 1428 1429 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1430 if (!acm->ctrlurb) 1431 goto alloc_fail5; 1432 1433 for (i = 0; i < num_rx_buf; i++) { 1434 struct acm_rb *rb = &(acm->read_buffers[i]); 1435 struct urb *urb; 1436 1437 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1438 &rb->dma); 1439 if (!rb->base) 1440 goto alloc_fail6; 1441 rb->index = i; 1442 rb->instance = acm; 1443 1444 urb = usb_alloc_urb(0, GFP_KERNEL); 1445 if (!urb) 1446 goto alloc_fail6; 1447 1448 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1449 urb->transfer_dma = rb->dma; 1450 if (usb_endpoint_xfer_int(epread)) 1451 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1452 acm->readsize, 1453 acm_read_bulk_callback, rb, 1454 acm->bInterval); 1455 else 1456 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1457 acm->readsize, 1458 acm_read_bulk_callback, rb); 1459 1460 acm->read_urbs[i] = urb; 1461 __set_bit(i, &acm->read_urbs_free); 1462 } 1463 for (i = 0; i < ACM_NW; i++) { 1464 struct acm_wb *snd = &(acm->wb[i]); 1465 1466 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1467 if (snd->urb == NULL) 1468 goto alloc_fail7; 1469 1470 if (usb_endpoint_xfer_int(epwrite)) 1471 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1472 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1473 else 1474 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1475 NULL, acm->writesize, acm_write_bulk, snd); 1476 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1477 if (quirks & SEND_ZERO_PACKET) 1478 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1479 snd->instance = acm; 1480 } 1481 1482 usb_set_intfdata(intf, acm); 1483 1484 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1485 if (i < 0) 1486 goto alloc_fail7; 1487 1488 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1489 struct usb_cdc_country_functional_desc * cfd = 1490 h.usb_cdc_country_functional_desc; 1491 1492 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1493 if (!acm->country_codes) 1494 goto skip_countries; 1495 acm->country_code_size = cfd->bLength - 4; 1496 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1497 cfd->bLength - 4); 1498 acm->country_rel_date = cfd->iCountryCodeRelDate; 1499 1500 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1501 if (i < 0) { 1502 kfree(acm->country_codes); 1503 acm->country_codes = NULL; 1504 acm->country_code_size = 0; 1505 goto skip_countries; 1506 } 1507 1508 i = device_create_file(&intf->dev, 1509 &dev_attr_iCountryCodeRelDate); 1510 if (i < 0) { 1511 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1512 kfree(acm->country_codes); 1513 acm->country_codes = NULL; 1514 acm->country_code_size = 0; 1515 goto skip_countries; 1516 } 1517 } 1518 1519 skip_countries: 1520 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1521 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1522 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1523 /* works around buggy devices */ 1524 epctrl->bInterval ? epctrl->bInterval : 16); 1525 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1526 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1527 acm->notification_buffer = NULL; 1528 acm->nb_index = 0; 1529 acm->nb_size = 0; 1530 1531 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1532 1533 acm->line.dwDTERate = cpu_to_le32(9600); 1534 acm->line.bDataBits = 8; 1535 acm_set_line(acm, &acm->line); 1536 1537 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1538 usb_set_intfdata(data_interface, acm); 1539 1540 usb_get_intf(control_interface); 1541 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1542 &control_interface->dev); 1543 if (IS_ERR(tty_dev)) { 1544 rv = PTR_ERR(tty_dev); 1545 goto alloc_fail8; 1546 } 1547 1548 if (quirks & CLEAR_HALT_CONDITIONS) { 1549 usb_clear_halt(usb_dev, acm->in); 1550 usb_clear_halt(usb_dev, acm->out); 1551 } 1552 1553 return 0; 1554 alloc_fail8: 1555 if (acm->country_codes) { 1556 device_remove_file(&acm->control->dev, 1557 &dev_attr_wCountryCodes); 1558 device_remove_file(&acm->control->dev, 1559 &dev_attr_iCountryCodeRelDate); 1560 kfree(acm->country_codes); 1561 } 1562 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1563 alloc_fail7: 1564 usb_set_intfdata(intf, NULL); 1565 for (i = 0; i < ACM_NW; i++) 1566 usb_free_urb(acm->wb[i].urb); 1567 alloc_fail6: 1568 for (i = 0; i < num_rx_buf; i++) 1569 usb_free_urb(acm->read_urbs[i]); 1570 acm_read_buffers_free(acm); 1571 usb_free_urb(acm->ctrlurb); 1572 alloc_fail5: 1573 acm_write_buffers_free(acm); 1574 alloc_fail4: 1575 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1576 alloc_fail2: 1577 acm_release_minor(acm); 1578 alloc_fail1: 1579 kfree(acm); 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(0x22b8, 0x7000), /* Motorola Q Phone */ 1762 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1763 }, 1764 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1765 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1766 }, 1767 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1768 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1769 }, 1770 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1771 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1772 }, 1773 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1774 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1775 }, 1776 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1777 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1778 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1779 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1780 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1781 }, 1782 /* Motorola H24 HSPA module: */ 1783 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1784 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1785 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1786 }, 1787 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1788 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1789 }, 1790 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1791 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1792 }, 1793 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1794 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1795 }, 1796 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1797 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1798 }, 1799 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1800 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1801 }, 1802 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1803 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1804 }, 1805 1806 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1807 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1808 data interface instead of 1809 communications interface. 1810 Maybe we should define a new 1811 quirk for this. */ 1812 }, 1813 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1814 .driver_info = NO_UNION_NORMAL, 1815 }, 1816 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1817 .driver_info = NO_UNION_NORMAL, 1818 }, 1819 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1820 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1821 }, 1822 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1823 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1824 }, 1825 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1826 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1827 }, 1828 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1829 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1830 }, 1831 1832 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1833 .driver_info = CLEAR_HALT_CONDITIONS, 1834 }, 1835 1836 /* Nokia S60 phones expose two ACM channels. The first is 1837 * a modem and is picked up by the standard AT-command 1838 * information below. The second is 'vendor-specific' but 1839 * is treated as a serial device at the S60 end, so we want 1840 * to expose it on Linux too. */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1888 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1889 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1890 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1891 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1892 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1893 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1894 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1895 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1896 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1897 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1898 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1899 1900 /* Support for Owen devices */ 1901 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1902 1903 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1904 1905 /* Support for Droids MuIn LCD */ 1906 { USB_DEVICE(0x04d8, 0x000b), 1907 .driver_info = NO_DATA_INTERFACE, 1908 }, 1909 1910 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1911 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1912 .driver_info = IGNORE_DEVICE, 1913 }, 1914 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1915 .driver_info = IGNORE_DEVICE, 1916 }, 1917 #endif 1918 1919 /*Samsung phone in firmware update mode */ 1920 { USB_DEVICE(0x04e8, 0x685d), 1921 .driver_info = IGNORE_DEVICE, 1922 }, 1923 1924 /* Exclude Infineon Flash Loader utility */ 1925 { USB_DEVICE(0x058b, 0x0041), 1926 .driver_info = IGNORE_DEVICE, 1927 }, 1928 1929 /* control interfaces without any protocol set */ 1930 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1931 USB_CDC_PROTO_NONE) }, 1932 1933 /* control interfaces with various AT-command sets */ 1934 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1935 USB_CDC_ACM_PROTO_AT_V25TER) }, 1936 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1937 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1938 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1939 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1940 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1941 USB_CDC_ACM_PROTO_AT_GSM) }, 1942 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1943 USB_CDC_ACM_PROTO_AT_3G) }, 1944 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1945 USB_CDC_ACM_PROTO_AT_CDMA) }, 1946 1947 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1948 .driver_info = SEND_ZERO_PACKET, 1949 }, 1950 1951 { } 1952 }; 1953 1954 MODULE_DEVICE_TABLE(usb, acm_ids); 1955 1956 static struct usb_driver acm_driver = { 1957 .name = "cdc_acm", 1958 .probe = acm_probe, 1959 .disconnect = acm_disconnect, 1960 #ifdef CONFIG_PM 1961 .suspend = acm_suspend, 1962 .resume = acm_resume, 1963 .reset_resume = acm_reset_resume, 1964 #endif 1965 .pre_reset = acm_pre_reset, 1966 .id_table = acm_ids, 1967 #ifdef CONFIG_PM 1968 .supports_autosuspend = 1, 1969 #endif 1970 .disable_hub_initiated_lpm = 1, 1971 }; 1972 1973 /* 1974 * TTY driver structures. 1975 */ 1976 1977 static const struct tty_operations acm_ops = { 1978 .install = acm_tty_install, 1979 .open = acm_tty_open, 1980 .close = acm_tty_close, 1981 .cleanup = acm_tty_cleanup, 1982 .hangup = acm_tty_hangup, 1983 .write = acm_tty_write, 1984 .put_char = acm_tty_put_char, 1985 .flush_chars = acm_tty_flush_chars, 1986 .write_room = acm_tty_write_room, 1987 .ioctl = acm_tty_ioctl, 1988 .throttle = acm_tty_throttle, 1989 .unthrottle = acm_tty_unthrottle, 1990 .chars_in_buffer = acm_tty_chars_in_buffer, 1991 .break_ctl = acm_tty_break_ctl, 1992 .set_termios = acm_tty_set_termios, 1993 .tiocmget = acm_tty_tiocmget, 1994 .tiocmset = acm_tty_tiocmset, 1995 .get_icount = acm_tty_get_icount, 1996 }; 1997 1998 /* 1999 * Init / exit. 2000 */ 2001 2002 static int __init acm_init(void) 2003 { 2004 int retval; 2005 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 2006 if (!acm_tty_driver) 2007 return -ENOMEM; 2008 acm_tty_driver->driver_name = "acm", 2009 acm_tty_driver->name = "ttyACM", 2010 acm_tty_driver->major = ACM_TTY_MAJOR, 2011 acm_tty_driver->minor_start = 0, 2012 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2013 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2014 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2015 acm_tty_driver->init_termios = tty_std_termios; 2016 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2017 HUPCL | CLOCAL; 2018 tty_set_operations(acm_tty_driver, &acm_ops); 2019 2020 retval = tty_register_driver(acm_tty_driver); 2021 if (retval) { 2022 put_tty_driver(acm_tty_driver); 2023 return retval; 2024 } 2025 2026 retval = usb_register(&acm_driver); 2027 if (retval) { 2028 tty_unregister_driver(acm_tty_driver); 2029 put_tty_driver(acm_tty_driver); 2030 return retval; 2031 } 2032 2033 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2034 2035 return 0; 2036 } 2037 2038 static void __exit acm_exit(void) 2039 { 2040 usb_deregister(&acm_driver); 2041 tty_unregister_driver(acm_tty_driver); 2042 put_tty_driver(acm_tty_driver); 2043 idr_destroy(&acm_minors); 2044 } 2045 2046 module_init(acm_init); 2047 module_exit(acm_exit); 2048 2049 MODULE_AUTHOR(DRIVER_AUTHOR); 2050 MODULE_DESCRIPTION(DRIVER_DESC); 2051 MODULE_LICENSE("GPL"); 2052 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2053