1/* 2 * cdc-acm.c 3 * 4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 11 * 12 * USB Abstract Control Model driver for USB modems and ISDN adapters 13 * 14 * Sponsored by SuSE 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 */ 30 31#undef DEBUG 32#undef VERBOSE_DEBUG 33 34#include <linux/kernel.h> 35#include <linux/errno.h> 36#include <linux/init.h> 37#include <linux/slab.h> 38#include <linux/tty.h> 39#include <linux/serial.h> 40#include <linux/tty_driver.h> 41#include <linux/tty_flip.h> 42#include <linux/module.h> 43#include <linux/mutex.h> 44#include <linux/uaccess.h> 45#include <linux/usb.h> 46#include <linux/usb/cdc.h> 47#include <asm/byteorder.h> 48#include <asm/unaligned.h> 49#include <linux/list.h> 50 51#include "cdc-acm.h" 52 53 54#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 55#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 56 57static struct usb_driver acm_driver; 58static struct tty_driver *acm_tty_driver; 59static struct acm *acm_table[ACM_TTY_MINORS]; 60 61static DEFINE_MUTEX(acm_table_lock); 62 63static void acm_tty_set_termios(struct tty_struct *tty, 64 struct ktermios *termios_old); 65 66/* 67 * acm_table accessors 68 */ 69 70/* 71 * Look up an ACM structure by index. If found and not disconnected, increment 72 * its refcount and return it with its mutex held. 73 */ 74static struct acm *acm_get_by_index(unsigned index) 75{ 76 struct acm *acm; 77 78 mutex_lock(&acm_table_lock); 79 acm = acm_table[index]; 80 if (acm) { 81 mutex_lock(&acm->mutex); 82 if (acm->disconnected) { 83 mutex_unlock(&acm->mutex); 84 acm = NULL; 85 } else { 86 tty_port_get(&acm->port); 87 mutex_unlock(&acm->mutex); 88 } 89 } 90 mutex_unlock(&acm_table_lock); 91 return acm; 92} 93 94/* 95 * Try to find an available minor number and if found, associate it with 'acm'. 96 */ 97static int acm_alloc_minor(struct acm *acm) 98{ 99 int minor; 100 101 mutex_lock(&acm_table_lock); 102 for (minor = 0; minor < ACM_TTY_MINORS; minor++) { 103 if (!acm_table[minor]) { 104 acm_table[minor] = acm; 105 break; 106 } 107 } 108 mutex_unlock(&acm_table_lock); 109 110 return minor; 111} 112 113/* Release the minor number associated with 'acm'. */ 114static void acm_release_minor(struct acm *acm) 115{ 116 mutex_lock(&acm_table_lock); 117 acm_table[acm->minor] = NULL; 118 mutex_unlock(&acm_table_lock); 119} 120 121/* 122 * Functions for ACM control messages. 123 */ 124 125static int acm_ctrl_msg(struct acm *acm, int request, int value, 126 void *buf, int len) 127{ 128 int retval; 129 130 retval = usb_autopm_get_interface(acm->control); 131 if (retval) 132 return retval; 133 134 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 135 request, USB_RT_ACM, value, 136 acm->control->altsetting[0].desc.bInterfaceNumber, 137 buf, len, 5000); 138 139 dev_dbg(&acm->control->dev, 140 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 141 __func__, request, value, len, retval); 142 143 usb_autopm_put_interface(acm->control); 144 145 return retval < 0 ? retval : 0; 146} 147 148/* devices aren't required to support these requests. 149 * the cdc acm descriptor tells whether they do... 150 */ 151static inline int acm_set_control(struct acm *acm, int control) 152{ 153 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 154 return -EOPNOTSUPP; 155 156 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 157 control, NULL, 0); 158} 159 160#define acm_set_line(acm, line) \ 161 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 162#define acm_send_break(acm, ms) \ 163 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 164 165/* 166 * Write buffer management. 167 * All of these assume proper locks taken by the caller. 168 */ 169 170static int acm_wb_alloc(struct acm *acm) 171{ 172 int i, wbn; 173 struct acm_wb *wb; 174 175 wbn = 0; 176 i = 0; 177 for (;;) { 178 wb = &acm->wb[wbn]; 179 if (!wb->use) { 180 wb->use = 1; 181 return wbn; 182 } 183 wbn = (wbn + 1) % ACM_NW; 184 if (++i >= ACM_NW) 185 return -1; 186 } 187} 188 189static int acm_wb_is_avail(struct acm *acm) 190{ 191 int i, n; 192 unsigned long flags; 193 194 n = ACM_NW; 195 spin_lock_irqsave(&acm->write_lock, flags); 196 for (i = 0; i < ACM_NW; i++) 197 n -= acm->wb[i].use; 198 spin_unlock_irqrestore(&acm->write_lock, flags); 199 return n; 200} 201 202/* 203 * Finish write. Caller must hold acm->write_lock 204 */ 205static void acm_write_done(struct acm *acm, struct acm_wb *wb) 206{ 207 wb->use = 0; 208 acm->transmitting--; 209 usb_autopm_put_interface_async(acm->control); 210} 211 212/* 213 * Poke write. 214 * 215 * the caller is responsible for locking 216 */ 217 218static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 219{ 220 int rc; 221 222 acm->transmitting++; 223 224 wb->urb->transfer_buffer = wb->buf; 225 wb->urb->transfer_dma = wb->dmah; 226 wb->urb->transfer_buffer_length = wb->len; 227 wb->urb->dev = acm->dev; 228 229 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 230 if (rc < 0) { 231 dev_err(&acm->data->dev, 232 "%s - usb_submit_urb(write bulk) failed: %d\n", 233 __func__, rc); 234 acm_write_done(acm, wb); 235 } 236 return rc; 237} 238 239/* 240 * attributes exported through sysfs 241 */ 242static ssize_t show_caps 243(struct device *dev, struct device_attribute *attr, char *buf) 244{ 245 struct usb_interface *intf = to_usb_interface(dev); 246 struct acm *acm = usb_get_intfdata(intf); 247 248 return sprintf(buf, "%d", acm->ctrl_caps); 249} 250static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); 251 252static ssize_t show_country_codes 253(struct device *dev, struct device_attribute *attr, char *buf) 254{ 255 struct usb_interface *intf = to_usb_interface(dev); 256 struct acm *acm = usb_get_intfdata(intf); 257 258 memcpy(buf, acm->country_codes, acm->country_code_size); 259 return acm->country_code_size; 260} 261 262static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); 263 264static ssize_t show_country_rel_date 265(struct device *dev, struct device_attribute *attr, char *buf) 266{ 267 struct usb_interface *intf = to_usb_interface(dev); 268 struct acm *acm = usb_get_intfdata(intf); 269 270 return sprintf(buf, "%d", acm->country_rel_date); 271} 272 273static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); 274/* 275 * Interrupt handlers for various ACM device responses 276 */ 277 278/* control interface reports status changes with "interrupt" transfers */ 279static void acm_ctrl_irq(struct urb *urb) 280{ 281 struct acm *acm = urb->context; 282 struct usb_cdc_notification *dr = urb->transfer_buffer; 283 unsigned char *data; 284 int newctrl; 285 int difference; 286 int retval; 287 int status = urb->status; 288 289 switch (status) { 290 case 0: 291 /* success */ 292 break; 293 case -ECONNRESET: 294 case -ENOENT: 295 case -ESHUTDOWN: 296 /* this urb is terminated, clean up */ 297 dev_dbg(&acm->control->dev, 298 "%s - urb shutting down with status: %d\n", 299 __func__, status); 300 return; 301 default: 302 dev_dbg(&acm->control->dev, 303 "%s - nonzero urb status received: %d\n", 304 __func__, status); 305 goto exit; 306 } 307 308 usb_mark_last_busy(acm->dev); 309 310 data = (unsigned char *)(dr + 1); 311 switch (dr->bNotificationType) { 312 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 313 dev_dbg(&acm->control->dev, "%s - network connection: %d\n", 314 __func__, dr->wValue); 315 break; 316 317 case USB_CDC_NOTIFY_SERIAL_STATE: 318 newctrl = get_unaligned_le16(data); 319 320 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 321 dev_dbg(&acm->control->dev, "%s - calling hangup\n", 322 __func__); 323 tty_port_tty_hangup(&acm->port, false); 324 } 325 326 difference = acm->ctrlin ^ newctrl; 327 spin_lock(&acm->read_lock); 328 acm->ctrlin = newctrl; 329 acm->oldcount = acm->iocount; 330 331 if (difference & ACM_CTRL_DSR) 332 acm->iocount.dsr++; 333 if (difference & ACM_CTRL_BRK) 334 acm->iocount.brk++; 335 if (difference & ACM_CTRL_RI) 336 acm->iocount.rng++; 337 if (difference & ACM_CTRL_DCD) 338 acm->iocount.dcd++; 339 if (difference & ACM_CTRL_FRAMING) 340 acm->iocount.frame++; 341 if (difference & ACM_CTRL_PARITY) 342 acm->iocount.parity++; 343 if (difference & ACM_CTRL_OVERRUN) 344 acm->iocount.overrun++; 345 spin_unlock(&acm->read_lock); 346 347 if (difference) 348 wake_up_all(&acm->wioctl); 349 350 break; 351 352 default: 353 dev_dbg(&acm->control->dev, 354 "%s - unknown notification %d received: index %d " 355 "len %d data0 %d data1 %d\n", 356 __func__, 357 dr->bNotificationType, dr->wIndex, 358 dr->wLength, data[0], data[1]); 359 break; 360 } 361exit: 362 retval = usb_submit_urb(urb, GFP_ATOMIC); 363 if (retval) 364 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", 365 __func__, retval); 366} 367 368static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 369{ 370 int res; 371 372 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 373 return 0; 374 375 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index); 376 377 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 378 if (res) { 379 if (res != -EPERM) { 380 dev_err(&acm->data->dev, 381 "%s - usb_submit_urb failed: %d\n", 382 __func__, res); 383 } 384 set_bit(index, &acm->read_urbs_free); 385 return res; 386 } 387 388 return 0; 389} 390 391static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 392{ 393 int res; 394 int i; 395 396 for (i = 0; i < acm->rx_buflimit; ++i) { 397 res = acm_submit_read_urb(acm, i, mem_flags); 398 if (res) 399 return res; 400 } 401 402 return 0; 403} 404 405static void acm_process_read_urb(struct acm *acm, struct urb *urb) 406{ 407 if (!urb->actual_length) 408 return; 409 410 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 411 urb->actual_length); 412 tty_flip_buffer_push(&acm->port); 413} 414 415static void acm_read_bulk_callback(struct urb *urb) 416{ 417 struct acm_rb *rb = urb->context; 418 struct acm *acm = rb->instance; 419 unsigned long flags; 420 421 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__, 422 rb->index, urb->actual_length); 423 set_bit(rb->index, &acm->read_urbs_free); 424 425 if (!acm->dev) { 426 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 427 return; 428 } 429 430 if (urb->status) { 431 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n", 432 __func__, urb->status); 433 return; 434 } 435 436 usb_mark_last_busy(acm->dev); 437 438 acm_process_read_urb(acm, urb); 439 440 /* throttle device if requested by tty */ 441 spin_lock_irqsave(&acm->read_lock, flags); 442 acm->throttled = acm->throttle_req; 443 if (!acm->throttled) { 444 spin_unlock_irqrestore(&acm->read_lock, flags); 445 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 446 } else { 447 spin_unlock_irqrestore(&acm->read_lock, flags); 448 } 449} 450 451/* data interface wrote those outgoing bytes */ 452static void acm_write_bulk(struct urb *urb) 453{ 454 struct acm_wb *wb = urb->context; 455 struct acm *acm = wb->instance; 456 unsigned long flags; 457 458 if (urb->status || (urb->actual_length != urb->transfer_buffer_length)) 459 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n", 460 __func__, 461 urb->actual_length, 462 urb->transfer_buffer_length, 463 urb->status); 464 465 spin_lock_irqsave(&acm->write_lock, flags); 466 acm_write_done(acm, wb); 467 spin_unlock_irqrestore(&acm->write_lock, flags); 468 schedule_work(&acm->work); 469} 470 471static void acm_softint(struct work_struct *work) 472{ 473 struct acm *acm = container_of(work, struct acm, work); 474 475 dev_vdbg(&acm->data->dev, "%s\n", __func__); 476 477 tty_port_tty_wakeup(&acm->port); 478} 479 480/* 481 * TTY handlers 482 */ 483 484static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 485{ 486 struct acm *acm; 487 int retval; 488 489 dev_dbg(tty->dev, "%s\n", __func__); 490 491 acm = acm_get_by_index(tty->index); 492 if (!acm) 493 return -ENODEV; 494 495 retval = tty_standard_install(driver, tty); 496 if (retval) 497 goto error_init_termios; 498 499 tty->driver_data = acm; 500 501 return 0; 502 503error_init_termios: 504 tty_port_put(&acm->port); 505 return retval; 506} 507 508static int acm_tty_open(struct tty_struct *tty, struct file *filp) 509{ 510 struct acm *acm = tty->driver_data; 511 512 dev_dbg(tty->dev, "%s\n", __func__); 513 514 return tty_port_open(&acm->port, tty, filp); 515} 516 517static void acm_port_dtr_rts(struct tty_port *port, int raise) 518{ 519 struct acm *acm = container_of(port, struct acm, port); 520 int val; 521 int res; 522 523 if (raise) 524 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 525 else 526 val = 0; 527 528 /* FIXME: add missing ctrlout locking throughout driver */ 529 acm->ctrlout = val; 530 531 res = acm_set_control(acm, val); 532 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 533 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 534} 535 536static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 537{ 538 struct acm *acm = container_of(port, struct acm, port); 539 int retval = -ENODEV; 540 int i; 541 542 dev_dbg(&acm->control->dev, "%s\n", __func__); 543 544 mutex_lock(&acm->mutex); 545 if (acm->disconnected) 546 goto disconnected; 547 548 retval = usb_autopm_get_interface(acm->control); 549 if (retval) 550 goto error_get_interface; 551 552 /* 553 * FIXME: Why do we need this? Allocating 64K of physically contiguous 554 * memory is really nasty... 555 */ 556 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 557 acm->control->needs_remote_wakeup = 1; 558 559 acm->ctrlurb->dev = acm->dev; 560 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 561 if (retval) { 562 dev_err(&acm->control->dev, 563 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 564 goto error_submit_urb; 565 } 566 567 acm_tty_set_termios(tty, NULL); 568 569 /* 570 * Unthrottle device in case the TTY was closed while throttled. 571 */ 572 spin_lock_irq(&acm->read_lock); 573 acm->throttled = 0; 574 acm->throttle_req = 0; 575 spin_unlock_irq(&acm->read_lock); 576 577 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 578 if (retval) 579 goto error_submit_read_urbs; 580 581 usb_autopm_put_interface(acm->control); 582 583 mutex_unlock(&acm->mutex); 584 585 return 0; 586 587error_submit_read_urbs: 588 for (i = 0; i < acm->rx_buflimit; i++) 589 usb_kill_urb(acm->read_urbs[i]); 590 usb_kill_urb(acm->ctrlurb); 591error_submit_urb: 592 usb_autopm_put_interface(acm->control); 593error_get_interface: 594disconnected: 595 mutex_unlock(&acm->mutex); 596 597 return usb_translate_errors(retval); 598} 599 600static void acm_port_destruct(struct tty_port *port) 601{ 602 struct acm *acm = container_of(port, struct acm, port); 603 604 dev_dbg(&acm->control->dev, "%s\n", __func__); 605 606 acm_release_minor(acm); 607 usb_put_intf(acm->control); 608 kfree(acm->country_codes); 609 kfree(acm); 610} 611 612static void acm_port_shutdown(struct tty_port *port) 613{ 614 struct acm *acm = container_of(port, struct acm, port); 615 struct urb *urb; 616 struct acm_wb *wb; 617 int i; 618 619 dev_dbg(&acm->control->dev, "%s\n", __func__); 620 621 /* 622 * Need to grab write_lock to prevent race with resume, but no need to 623 * hold it due to the tty-port initialised flag. 624 */ 625 spin_lock_irq(&acm->write_lock); 626 spin_unlock_irq(&acm->write_lock); 627 628 usb_autopm_get_interface_no_resume(acm->control); 629 acm->control->needs_remote_wakeup = 0; 630 usb_autopm_put_interface(acm->control); 631 632 for (;;) { 633 urb = usb_get_from_anchor(&acm->delayed); 634 if (!urb) 635 break; 636 wb = urb->context; 637 wb->use = 0; 638 usb_autopm_put_interface_async(acm->control); 639 } 640 641 usb_kill_urb(acm->ctrlurb); 642 for (i = 0; i < ACM_NW; i++) 643 usb_kill_urb(acm->wb[i].urb); 644 for (i = 0; i < acm->rx_buflimit; i++) 645 usb_kill_urb(acm->read_urbs[i]); 646} 647 648static void acm_tty_cleanup(struct tty_struct *tty) 649{ 650 struct acm *acm = tty->driver_data; 651 dev_dbg(&acm->control->dev, "%s\n", __func__); 652 tty_port_put(&acm->port); 653} 654 655static void acm_tty_hangup(struct tty_struct *tty) 656{ 657 struct acm *acm = tty->driver_data; 658 dev_dbg(&acm->control->dev, "%s\n", __func__); 659 tty_port_hangup(&acm->port); 660} 661 662static void acm_tty_close(struct tty_struct *tty, struct file *filp) 663{ 664 struct acm *acm = tty->driver_data; 665 dev_dbg(&acm->control->dev, "%s\n", __func__); 666 tty_port_close(&acm->port, tty, filp); 667} 668 669static int acm_tty_write(struct tty_struct *tty, 670 const unsigned char *buf, int count) 671{ 672 struct acm *acm = tty->driver_data; 673 int stat; 674 unsigned long flags; 675 int wbn; 676 struct acm_wb *wb; 677 678 if (!count) 679 return 0; 680 681 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count); 682 683 spin_lock_irqsave(&acm->write_lock, flags); 684 wbn = acm_wb_alloc(acm); 685 if (wbn < 0) { 686 spin_unlock_irqrestore(&acm->write_lock, flags); 687 return 0; 688 } 689 wb = &acm->wb[wbn]; 690 691 if (!acm->dev) { 692 wb->use = 0; 693 spin_unlock_irqrestore(&acm->write_lock, flags); 694 return -ENODEV; 695 } 696 697 count = (count > acm->writesize) ? acm->writesize : count; 698 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count); 699 memcpy(wb->buf, buf, count); 700 wb->len = count; 701 702 stat = usb_autopm_get_interface_async(acm->control); 703 if (stat) { 704 wb->use = 0; 705 spin_unlock_irqrestore(&acm->write_lock, flags); 706 return stat; 707 } 708 709 if (acm->susp_count) { 710 usb_anchor_urb(wb->urb, &acm->delayed); 711 spin_unlock_irqrestore(&acm->write_lock, flags); 712 return count; 713 } 714 715 stat = acm_start_wb(acm, wb); 716 spin_unlock_irqrestore(&acm->write_lock, flags); 717 718 if (stat < 0) 719 return stat; 720 return count; 721} 722 723static int acm_tty_write_room(struct tty_struct *tty) 724{ 725 struct acm *acm = tty->driver_data; 726 /* 727 * Do not let the line discipline to know that we have a reserve, 728 * or it might get too enthusiastic. 729 */ 730 return acm_wb_is_avail(acm) ? acm->writesize : 0; 731} 732 733static int acm_tty_chars_in_buffer(struct tty_struct *tty) 734{ 735 struct acm *acm = tty->driver_data; 736 /* 737 * if the device was unplugged then any remaining characters fell out 738 * of the connector ;) 739 */ 740 if (acm->disconnected) 741 return 0; 742 /* 743 * This is inaccurate (overcounts), but it works. 744 */ 745 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 746} 747 748static void acm_tty_throttle(struct tty_struct *tty) 749{ 750 struct acm *acm = tty->driver_data; 751 752 spin_lock_irq(&acm->read_lock); 753 acm->throttle_req = 1; 754 spin_unlock_irq(&acm->read_lock); 755} 756 757static void acm_tty_unthrottle(struct tty_struct *tty) 758{ 759 struct acm *acm = tty->driver_data; 760 unsigned int was_throttled; 761 762 spin_lock_irq(&acm->read_lock); 763 was_throttled = acm->throttled; 764 acm->throttled = 0; 765 acm->throttle_req = 0; 766 spin_unlock_irq(&acm->read_lock); 767 768 if (was_throttled) 769 acm_submit_read_urbs(acm, GFP_KERNEL); 770} 771 772static int acm_tty_break_ctl(struct tty_struct *tty, int state) 773{ 774 struct acm *acm = tty->driver_data; 775 int retval; 776 777 retval = acm_send_break(acm, state ? 0xffff : 0); 778 if (retval < 0) 779 dev_dbg(&acm->control->dev, "%s - send break failed\n", 780 __func__); 781 return retval; 782} 783 784static int acm_tty_tiocmget(struct tty_struct *tty) 785{ 786 struct acm *acm = tty->driver_data; 787 788 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 789 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 790 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 791 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 792 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 793 TIOCM_CTS; 794} 795 796static int acm_tty_tiocmset(struct tty_struct *tty, 797 unsigned int set, unsigned int clear) 798{ 799 struct acm *acm = tty->driver_data; 800 unsigned int newctrl; 801 802 newctrl = acm->ctrlout; 803 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 804 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 805 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 806 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 807 808 newctrl = (newctrl & ~clear) | set; 809 810 if (acm->ctrlout == newctrl) 811 return 0; 812 return acm_set_control(acm, acm->ctrlout = newctrl); 813} 814 815static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 816{ 817 struct serial_struct tmp; 818 819 if (!info) 820 return -EINVAL; 821 822 memset(&tmp, 0, sizeof(tmp)); 823 tmp.flags = ASYNC_LOW_LATENCY; 824 tmp.xmit_fifo_size = acm->writesize; 825 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 826 tmp.close_delay = acm->port.close_delay / 10; 827 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 828 ASYNC_CLOSING_WAIT_NONE : 829 acm->port.closing_wait / 10; 830 831 if (copy_to_user(info, &tmp, sizeof(tmp))) 832 return -EFAULT; 833 else 834 return 0; 835} 836 837static int set_serial_info(struct acm *acm, 838 struct serial_struct __user *newinfo) 839{ 840 struct serial_struct new_serial; 841 unsigned int closing_wait, close_delay; 842 int retval = 0; 843 844 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 845 return -EFAULT; 846 847 close_delay = new_serial.close_delay * 10; 848 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 849 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 850 851 mutex_lock(&acm->port.mutex); 852 853 if (!capable(CAP_SYS_ADMIN)) { 854 if ((close_delay != acm->port.close_delay) || 855 (closing_wait != acm->port.closing_wait)) 856 retval = -EPERM; 857 else 858 retval = -EOPNOTSUPP; 859 } else { 860 acm->port.close_delay = close_delay; 861 acm->port.closing_wait = closing_wait; 862 } 863 864 mutex_unlock(&acm->port.mutex); 865 return retval; 866} 867 868static int wait_serial_change(struct acm *acm, unsigned long arg) 869{ 870 int rv = 0; 871 DECLARE_WAITQUEUE(wait, current); 872 struct async_icount old, new; 873 874 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD )) 875 return -EINVAL; 876 do { 877 spin_lock_irq(&acm->read_lock); 878 old = acm->oldcount; 879 new = acm->iocount; 880 acm->oldcount = new; 881 spin_unlock_irq(&acm->read_lock); 882 883 if ((arg & TIOCM_DSR) && 884 old.dsr != new.dsr) 885 break; 886 if ((arg & TIOCM_CD) && 887 old.dcd != new.dcd) 888 break; 889 if ((arg & TIOCM_RI) && 890 old.rng != new.rng) 891 break; 892 893 add_wait_queue(&acm->wioctl, &wait); 894 set_current_state(TASK_INTERRUPTIBLE); 895 schedule(); 896 remove_wait_queue(&acm->wioctl, &wait); 897 if (acm->disconnected) { 898 if (arg & TIOCM_CD) 899 break; 900 else 901 rv = -ENODEV; 902 } else { 903 if (signal_pending(current)) 904 rv = -ERESTARTSYS; 905 } 906 } while (!rv); 907 908 909 910 return rv; 911} 912 913static int get_serial_usage(struct acm *acm, 914 struct serial_icounter_struct __user *count) 915{ 916 struct serial_icounter_struct icount; 917 int rv = 0; 918 919 memset(&icount, 0, sizeof(icount)); 920 icount.dsr = acm->iocount.dsr; 921 icount.rng = acm->iocount.rng; 922 icount.dcd = acm->iocount.dcd; 923 icount.frame = acm->iocount.frame; 924 icount.overrun = acm->iocount.overrun; 925 icount.parity = acm->iocount.parity; 926 icount.brk = acm->iocount.brk; 927 928 if (copy_to_user(count, &icount, sizeof(icount)) > 0) 929 rv = -EFAULT; 930 931 return rv; 932} 933 934static int acm_tty_ioctl(struct tty_struct *tty, 935 unsigned int cmd, unsigned long arg) 936{ 937 struct acm *acm = tty->driver_data; 938 int rv = -ENOIOCTLCMD; 939 940 switch (cmd) { 941 case TIOCGSERIAL: /* gets serial port data */ 942 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 943 break; 944 case TIOCSSERIAL: 945 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 946 break; 947 case TIOCMIWAIT: 948 rv = usb_autopm_get_interface(acm->control); 949 if (rv < 0) { 950 rv = -EIO; 951 break; 952 } 953 rv = wait_serial_change(acm, arg); 954 usb_autopm_put_interface(acm->control); 955 break; 956 case TIOCGICOUNT: 957 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg); 958 break; 959 } 960 961 return rv; 962} 963 964static void acm_tty_set_termios(struct tty_struct *tty, 965 struct ktermios *termios_old) 966{ 967 struct acm *acm = tty->driver_data; 968 struct ktermios *termios = &tty->termios; 969 struct usb_cdc_line_coding newline; 970 int newctrl = acm->ctrlout; 971 972 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 973 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 974 newline.bParityType = termios->c_cflag & PARENB ? 975 (termios->c_cflag & PARODD ? 1 : 2) + 976 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 977 switch (termios->c_cflag & CSIZE) { 978 case CS5: 979 newline.bDataBits = 5; 980 break; 981 case CS6: 982 newline.bDataBits = 6; 983 break; 984 case CS7: 985 newline.bDataBits = 7; 986 break; 987 case CS8: 988 default: 989 newline.bDataBits = 8; 990 break; 991 } 992 /* FIXME: Needs to clear unsupported bits in the termios */ 993 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 994 995 if (C_BAUD(tty) == B0) { 996 newline.dwDTERate = acm->line.dwDTERate; 997 newctrl &= ~ACM_CTRL_DTR; 998 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 999 newctrl |= ACM_CTRL_DTR; 1000 } 1001 1002 if (newctrl != acm->ctrlout) 1003 acm_set_control(acm, acm->ctrlout = newctrl); 1004 1005 if (memcmp(&acm->line, &newline, sizeof newline)) { 1006 memcpy(&acm->line, &newline, sizeof newline); 1007 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1008 __func__, 1009 le32_to_cpu(newline.dwDTERate), 1010 newline.bCharFormat, newline.bParityType, 1011 newline.bDataBits); 1012 acm_set_line(acm, &acm->line); 1013 } 1014} 1015 1016static const struct tty_port_operations acm_port_ops = { 1017 .dtr_rts = acm_port_dtr_rts, 1018 .shutdown = acm_port_shutdown, 1019 .activate = acm_port_activate, 1020 .destruct = acm_port_destruct, 1021}; 1022 1023/* 1024 * USB probe and disconnect routines. 1025 */ 1026 1027/* Little helpers: write/read buffers free */ 1028static void acm_write_buffers_free(struct acm *acm) 1029{ 1030 int i; 1031 struct acm_wb *wb; 1032 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1033 1034 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1035 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); 1036} 1037 1038static void acm_read_buffers_free(struct acm *acm) 1039{ 1040 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1041 int i; 1042 1043 for (i = 0; i < acm->rx_buflimit; i++) 1044 usb_free_coherent(usb_dev, acm->readsize, 1045 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1046} 1047 1048/* Little helper: write buffers allocate */ 1049static int acm_write_buffers_alloc(struct acm *acm) 1050{ 1051 int i; 1052 struct acm_wb *wb; 1053 1054 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1055 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1056 &wb->dmah); 1057 if (!wb->buf) { 1058 while (i != 0) { 1059 --i; 1060 --wb; 1061 usb_free_coherent(acm->dev, acm->writesize, 1062 wb->buf, wb->dmah); 1063 } 1064 return -ENOMEM; 1065 } 1066 } 1067 return 0; 1068} 1069 1070static int acm_probe(struct usb_interface *intf, 1071 const struct usb_device_id *id) 1072{ 1073 struct usb_cdc_union_desc *union_header = NULL; 1074 struct usb_cdc_country_functional_desc *cfd = NULL; 1075 unsigned char *buffer = intf->altsetting->extra; 1076 int buflen = intf->altsetting->extralen; 1077 struct usb_interface *control_interface; 1078 struct usb_interface *data_interface; 1079 struct usb_endpoint_descriptor *epctrl = NULL; 1080 struct usb_endpoint_descriptor *epread = NULL; 1081 struct usb_endpoint_descriptor *epwrite = NULL; 1082 struct usb_device *usb_dev = interface_to_usbdev(intf); 1083 struct acm *acm; 1084 int minor; 1085 int ctrlsize, readsize; 1086 u8 *buf; 1087 u8 ac_management_function = 0; 1088 u8 call_management_function = 0; 1089 int call_interface_num = -1; 1090 int data_interface_num = -1; 1091 unsigned long quirks; 1092 int num_rx_buf; 1093 int i; 1094 int combined_interfaces = 0; 1095 struct device *tty_dev; 1096 int rv = -ENOMEM; 1097 1098 /* normal quirks */ 1099 quirks = (unsigned long)id->driver_info; 1100 1101 if (quirks == IGNORE_DEVICE) 1102 return -ENODEV; 1103 1104 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1105 1106 /* handle quirks deadly to normal probing*/ 1107 if (quirks == NO_UNION_NORMAL) { 1108 data_interface = usb_ifnum_to_if(usb_dev, 1); 1109 control_interface = usb_ifnum_to_if(usb_dev, 0); 1110 goto skip_normal_probe; 1111 } 1112 1113 /* normal probing*/ 1114 if (!buffer) { 1115 dev_err(&intf->dev, "Weird descriptor references\n"); 1116 return -EINVAL; 1117 } 1118 1119 if (!buflen) { 1120 if (intf->cur_altsetting->endpoint && 1121 intf->cur_altsetting->endpoint->extralen && 1122 intf->cur_altsetting->endpoint->extra) { 1123 dev_dbg(&intf->dev, 1124 "Seeking extra descriptors on endpoint\n"); 1125 buflen = intf->cur_altsetting->endpoint->extralen; 1126 buffer = intf->cur_altsetting->endpoint->extra; 1127 } else { 1128 dev_err(&intf->dev, 1129 "Zero length descriptor references\n"); 1130 return -EINVAL; 1131 } 1132 } 1133 1134 while (buflen > 0) { 1135 if (buffer[1] != USB_DT_CS_INTERFACE) { 1136 dev_err(&intf->dev, "skipping garbage\n"); 1137 goto next_desc; 1138 } 1139 1140 switch (buffer[2]) { 1141 case USB_CDC_UNION_TYPE: /* we've found it */ 1142 if (union_header) { 1143 dev_err(&intf->dev, "More than one " 1144 "union descriptor, skipping ...\n"); 1145 goto next_desc; 1146 } 1147 union_header = (struct usb_cdc_union_desc *)buffer; 1148 break; 1149 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ 1150 cfd = (struct usb_cdc_country_functional_desc *)buffer; 1151 break; 1152 case USB_CDC_HEADER_TYPE: /* maybe check version */ 1153 break; /* for now we ignore it */ 1154 case USB_CDC_ACM_TYPE: 1155 ac_management_function = buffer[3]; 1156 break; 1157 case USB_CDC_CALL_MANAGEMENT_TYPE: 1158 call_management_function = buffer[3]; 1159 call_interface_num = buffer[4]; 1160 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3) 1161 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); 1162 break; 1163 default: 1164 /* there are LOTS more CDC descriptors that 1165 * could legitimately be found here. 1166 */ 1167 dev_dbg(&intf->dev, "Ignoring descriptor: " 1168 "type %02x, length %d\n", 1169 buffer[2], buffer[0]); 1170 break; 1171 } 1172next_desc: 1173 buflen -= buffer[0]; 1174 buffer += buffer[0]; 1175 } 1176 1177 if (!union_header) { 1178 if (call_interface_num > 0) { 1179 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1180 /* quirks for Droids MuIn LCD */ 1181 if (quirks & NO_DATA_INTERFACE) 1182 data_interface = usb_ifnum_to_if(usb_dev, 0); 1183 else 1184 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); 1185 control_interface = intf; 1186 } else { 1187 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1188 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1189 return -ENODEV; 1190 } else { 1191 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1192 combined_interfaces = 1; 1193 control_interface = data_interface = intf; 1194 goto look_for_collapsed_interface; 1195 } 1196 } 1197 } else { 1198 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1199 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); 1200 if (!control_interface || !data_interface) { 1201 dev_dbg(&intf->dev, "no interfaces\n"); 1202 return -ENODEV; 1203 } 1204 } 1205 1206 if (data_interface_num != call_interface_num) 1207 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1208 1209 if (control_interface == data_interface) { 1210 /* some broken devices designed for windows work this way */ 1211 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1212 combined_interfaces = 1; 1213 /* a popular other OS doesn't use it */ 1214 quirks |= NO_CAP_LINE; 1215 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1216 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1217 return -EINVAL; 1218 } 1219look_for_collapsed_interface: 1220 for (i = 0; i < 3; i++) { 1221 struct usb_endpoint_descriptor *ep; 1222 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1223 1224 if (usb_endpoint_is_int_in(ep)) 1225 epctrl = ep; 1226 else if (usb_endpoint_is_bulk_out(ep)) 1227 epwrite = ep; 1228 else if (usb_endpoint_is_bulk_in(ep)) 1229 epread = ep; 1230 else 1231 return -EINVAL; 1232 } 1233 if (!epctrl || !epread || !epwrite) 1234 return -ENODEV; 1235 else 1236 goto made_compressed_probe; 1237 } 1238 1239skip_normal_probe: 1240 1241 /*workaround for switched interfaces */ 1242 if (data_interface->cur_altsetting->desc.bInterfaceClass 1243 != CDC_DATA_INTERFACE_TYPE) { 1244 if (control_interface->cur_altsetting->desc.bInterfaceClass 1245 == CDC_DATA_INTERFACE_TYPE) { 1246 struct usb_interface *t; 1247 dev_dbg(&intf->dev, 1248 "Your device has switched interfaces.\n"); 1249 t = control_interface; 1250 control_interface = data_interface; 1251 data_interface = t; 1252 } else { 1253 return -EINVAL; 1254 } 1255 } 1256 1257 /* Accept probe requests only for the control interface */ 1258 if (!combined_interfaces && intf != control_interface) 1259 return -ENODEV; 1260 1261 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1262 /* valid in this context */ 1263 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1264 return -EBUSY; 1265 } 1266 1267 1268 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1269 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1270 return -EINVAL; 1271 1272 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1273 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1274 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1275 1276 1277 /* workaround for switched endpoints */ 1278 if (!usb_endpoint_dir_in(epread)) { 1279 /* descriptors are swapped */ 1280 struct usb_endpoint_descriptor *t; 1281 dev_dbg(&intf->dev, 1282 "The data interface has switched endpoints\n"); 1283 t = epread; 1284 epread = epwrite; 1285 epwrite = t; 1286 } 1287made_compressed_probe: 1288 dev_dbg(&intf->dev, "interfaces are valid\n"); 1289 1290 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1291 if (acm == NULL) { 1292 dev_err(&intf->dev, "out of memory (acm kzalloc)\n"); 1293 goto alloc_fail; 1294 } 1295 1296 minor = acm_alloc_minor(acm); 1297 if (minor == ACM_TTY_MINORS) { 1298 dev_err(&intf->dev, "no more free acm devices\n"); 1299 kfree(acm); 1300 return -ENODEV; 1301 } 1302 1303 ctrlsize = usb_endpoint_maxp(epctrl); 1304 readsize = usb_endpoint_maxp(epread) * 1305 (quirks == SINGLE_RX_URB ? 1 : 2); 1306 acm->combined_interfaces = combined_interfaces; 1307 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1308 acm->control = control_interface; 1309 acm->data = data_interface; 1310 acm->minor = minor; 1311 acm->dev = usb_dev; 1312 acm->ctrl_caps = ac_management_function; 1313 if (quirks & NO_CAP_LINE) 1314 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1315 acm->ctrlsize = ctrlsize; 1316 acm->readsize = readsize; 1317 acm->rx_buflimit = num_rx_buf; 1318 INIT_WORK(&acm->work, acm_softint); 1319 init_waitqueue_head(&acm->wioctl); 1320 spin_lock_init(&acm->write_lock); 1321 spin_lock_init(&acm->read_lock); 1322 mutex_init(&acm->mutex); 1323 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1324 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1325 if (acm->is_int_ep) 1326 acm->bInterval = epread->bInterval; 1327 tty_port_init(&acm->port); 1328 acm->port.ops = &acm_port_ops; 1329 init_usb_anchor(&acm->delayed); 1330 acm->quirks = quirks; 1331 1332 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1333 if (!buf) { 1334 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n"); 1335 goto alloc_fail2; 1336 } 1337 acm->ctrl_buffer = buf; 1338 1339 if (acm_write_buffers_alloc(acm) < 0) { 1340 dev_err(&intf->dev, "out of memory (write buffer alloc)\n"); 1341 goto alloc_fail4; 1342 } 1343 1344 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1345 if (!acm->ctrlurb) { 1346 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); 1347 goto alloc_fail5; 1348 } 1349 for (i = 0; i < num_rx_buf; i++) { 1350 struct acm_rb *rb = &(acm->read_buffers[i]); 1351 struct urb *urb; 1352 1353 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1354 &rb->dma); 1355 if (!rb->base) { 1356 dev_err(&intf->dev, "out of memory " 1357 "(read bufs usb_alloc_coherent)\n"); 1358 goto alloc_fail6; 1359 } 1360 rb->index = i; 1361 rb->instance = acm; 1362 1363 urb = usb_alloc_urb(0, GFP_KERNEL); 1364 if (!urb) { 1365 dev_err(&intf->dev, 1366 "out of memory (read urbs usb_alloc_urb)\n"); 1367 goto alloc_fail6; 1368 } 1369 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1370 urb->transfer_dma = rb->dma; 1371 if (acm->is_int_ep) { 1372 usb_fill_int_urb(urb, acm->dev, 1373 acm->rx_endpoint, 1374 rb->base, 1375 acm->readsize, 1376 acm_read_bulk_callback, rb, 1377 acm->bInterval); 1378 } else { 1379 usb_fill_bulk_urb(urb, acm->dev, 1380 acm->rx_endpoint, 1381 rb->base, 1382 acm->readsize, 1383 acm_read_bulk_callback, rb); 1384 } 1385 1386 acm->read_urbs[i] = urb; 1387 __set_bit(i, &acm->read_urbs_free); 1388 } 1389 for (i = 0; i < ACM_NW; i++) { 1390 struct acm_wb *snd = &(acm->wb[i]); 1391 1392 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1393 if (snd->urb == NULL) { 1394 dev_err(&intf->dev, 1395 "out of memory (write urbs usb_alloc_urb)\n"); 1396 goto alloc_fail7; 1397 } 1398 1399 if (usb_endpoint_xfer_int(epwrite)) 1400 usb_fill_int_urb(snd->urb, usb_dev, 1401 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), 1402 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1403 else 1404 usb_fill_bulk_urb(snd->urb, usb_dev, 1405 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), 1406 NULL, acm->writesize, acm_write_bulk, snd); 1407 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1408 snd->instance = acm; 1409 } 1410 1411 usb_set_intfdata(intf, acm); 1412 1413 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1414 if (i < 0) 1415 goto alloc_fail7; 1416 1417 if (cfd) { /* export the country data */ 1418 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1419 if (!acm->country_codes) 1420 goto skip_countries; 1421 acm->country_code_size = cfd->bLength - 4; 1422 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1423 cfd->bLength - 4); 1424 acm->country_rel_date = cfd->iCountryCodeRelDate; 1425 1426 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1427 if (i < 0) { 1428 kfree(acm->country_codes); 1429 acm->country_codes = NULL; 1430 acm->country_code_size = 0; 1431 goto skip_countries; 1432 } 1433 1434 i = device_create_file(&intf->dev, 1435 &dev_attr_iCountryCodeRelDate); 1436 if (i < 0) { 1437 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1438 kfree(acm->country_codes); 1439 acm->country_codes = NULL; 1440 acm->country_code_size = 0; 1441 goto skip_countries; 1442 } 1443 } 1444 1445skip_countries: 1446 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1447 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1448 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1449 /* works around buggy devices */ 1450 epctrl->bInterval ? epctrl->bInterval : 16); 1451 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1452 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1453 1454 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1455 1456 acm->line.dwDTERate = cpu_to_le32(9600); 1457 acm->line.bDataBits = 8; 1458 acm_set_line(acm, &acm->line); 1459 1460 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1461 usb_set_intfdata(data_interface, acm); 1462 1463 usb_get_intf(control_interface); 1464 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1465 &control_interface->dev); 1466 if (IS_ERR(tty_dev)) { 1467 rv = PTR_ERR(tty_dev); 1468 goto alloc_fail8; 1469 } 1470 1471 return 0; 1472alloc_fail8: 1473 if (acm->country_codes) { 1474 device_remove_file(&acm->control->dev, 1475 &dev_attr_wCountryCodes); 1476 device_remove_file(&acm->control->dev, 1477 &dev_attr_iCountryCodeRelDate); 1478 } 1479 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1480alloc_fail7: 1481 usb_set_intfdata(intf, NULL); 1482 for (i = 0; i < ACM_NW; i++) 1483 usb_free_urb(acm->wb[i].urb); 1484alloc_fail6: 1485 for (i = 0; i < num_rx_buf; i++) 1486 usb_free_urb(acm->read_urbs[i]); 1487 acm_read_buffers_free(acm); 1488 usb_free_urb(acm->ctrlurb); 1489alloc_fail5: 1490 acm_write_buffers_free(acm); 1491alloc_fail4: 1492 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1493alloc_fail2: 1494 acm_release_minor(acm); 1495 kfree(acm); 1496alloc_fail: 1497 return rv; 1498} 1499 1500static void stop_data_traffic(struct acm *acm) 1501{ 1502 int i; 1503 1504 dev_dbg(&acm->control->dev, "%s\n", __func__); 1505 1506 usb_kill_urb(acm->ctrlurb); 1507 for (i = 0; i < ACM_NW; i++) 1508 usb_kill_urb(acm->wb[i].urb); 1509 for (i = 0; i < acm->rx_buflimit; i++) 1510 usb_kill_urb(acm->read_urbs[i]); 1511 1512 cancel_work_sync(&acm->work); 1513} 1514 1515static void acm_disconnect(struct usb_interface *intf) 1516{ 1517 struct acm *acm = usb_get_intfdata(intf); 1518 struct usb_device *usb_dev = interface_to_usbdev(intf); 1519 struct tty_struct *tty; 1520 int i; 1521 1522 dev_dbg(&intf->dev, "%s\n", __func__); 1523 1524 /* sibling interface is already cleaning up */ 1525 if (!acm) 1526 return; 1527 1528 mutex_lock(&acm->mutex); 1529 acm->disconnected = true; 1530 if (acm->country_codes) { 1531 device_remove_file(&acm->control->dev, 1532 &dev_attr_wCountryCodes); 1533 device_remove_file(&acm->control->dev, 1534 &dev_attr_iCountryCodeRelDate); 1535 } 1536 wake_up_all(&acm->wioctl); 1537 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1538 usb_set_intfdata(acm->control, NULL); 1539 usb_set_intfdata(acm->data, NULL); 1540 mutex_unlock(&acm->mutex); 1541 1542 tty = tty_port_tty_get(&acm->port); 1543 if (tty) { 1544 tty_vhangup(tty); 1545 tty_kref_put(tty); 1546 } 1547 1548 stop_data_traffic(acm); 1549 1550 tty_unregister_device(acm_tty_driver, acm->minor); 1551 1552 usb_free_urb(acm->ctrlurb); 1553 for (i = 0; i < ACM_NW; i++) 1554 usb_free_urb(acm->wb[i].urb); 1555 for (i = 0; i < acm->rx_buflimit; i++) 1556 usb_free_urb(acm->read_urbs[i]); 1557 acm_write_buffers_free(acm); 1558 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1559 acm_read_buffers_free(acm); 1560 1561 if (!acm->combined_interfaces) 1562 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1563 acm->data : acm->control); 1564 1565 tty_port_put(&acm->port); 1566} 1567 1568#ifdef CONFIG_PM 1569static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1570{ 1571 struct acm *acm = usb_get_intfdata(intf); 1572 int cnt; 1573 1574 spin_lock_irq(&acm->write_lock); 1575 if (PMSG_IS_AUTO(message)) { 1576 if (acm->transmitting) { 1577 spin_unlock_irq(&acm->write_lock); 1578 return -EBUSY; 1579 } 1580 } 1581 cnt = acm->susp_count++; 1582 spin_unlock_irq(&acm->write_lock); 1583 1584 if (cnt) 1585 return 0; 1586 1587 stop_data_traffic(acm); 1588 1589 return 0; 1590} 1591 1592static int acm_resume(struct usb_interface *intf) 1593{ 1594 struct acm *acm = usb_get_intfdata(intf); 1595 struct urb *urb; 1596 int rv = 0; 1597 1598 spin_lock_irq(&acm->write_lock); 1599 1600 if (--acm->susp_count) 1601 goto out; 1602 1603 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { 1604 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1605 1606 for (;;) { 1607 urb = usb_get_from_anchor(&acm->delayed); 1608 if (!urb) 1609 break; 1610 1611 acm_start_wb(acm, urb->context); 1612 } 1613 1614 /* 1615 * delayed error checking because we must 1616 * do the write path at all cost 1617 */ 1618 if (rv < 0) 1619 goto out; 1620 1621 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1622 } 1623out: 1624 spin_unlock_irq(&acm->write_lock); 1625 1626 return rv; 1627} 1628 1629static int acm_reset_resume(struct usb_interface *intf) 1630{ 1631 struct acm *acm = usb_get_intfdata(intf); 1632 1633 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) 1634 tty_port_tty_hangup(&acm->port, false); 1635 1636 return acm_resume(intf); 1637} 1638 1639#endif /* CONFIG_PM */ 1640 1641#define NOKIA_PCSUITE_ACM_INFO(x) \ 1642 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1643 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1644 USB_CDC_ACM_PROTO_VENDOR) 1645 1646#define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1647 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1648 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1649 USB_CDC_ACM_PROTO_VENDOR) 1650 1651/* 1652 * USB driver structure. 1653 */ 1654 1655static const struct usb_device_id acm_ids[] = { 1656 /* quirky and broken devices */ 1657 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1658 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1659 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1660 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1661 }, 1662 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1663 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1664 }, 1665 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1666 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1667 }, 1668 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1669 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1670 }, 1671 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1672 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1673 }, 1674 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1675 .driver_info = SINGLE_RX_URB, 1676 }, 1677 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1678 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1679 }, 1680 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1681 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1682 }, 1683 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1684 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1685 }, 1686 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1687 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1688 }, 1689 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1690 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1691 }, 1692 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1693 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1694 }, 1695 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1696 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1697 }, 1698 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1699 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1700 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1701 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1702 }, 1703 /* Motorola H24 HSPA module: */ 1704 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1705 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1706 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1707 }, 1708 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1709 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1710 }, 1711 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1712 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1713 }, 1714 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1715 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1716 }, 1717 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1718 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1719 }, 1720 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1721 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1722 }, 1723 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1724 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1725 }, 1726 1727 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1728 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1729 data interface instead of 1730 communications interface. 1731 Maybe we should define a new 1732 quirk for this. */ 1733 }, 1734 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1735 .driver_info = NO_UNION_NORMAL, 1736 }, 1737 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1738 .driver_info = NO_UNION_NORMAL, 1739 }, 1740 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1741 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1742 }, 1743 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1744 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1745 }, 1746 1747 /* Nokia S60 phones expose two ACM channels. The first is 1748 * a modem and is picked up by the standard AT-command 1749 * information below. The second is 'vendor-specific' but 1750 * is treated as a serial device at the S60 end, so we want 1751 * to expose it on Linux too. */ 1752 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1753 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1754 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1755 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1756 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1757 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1758 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1759 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1760 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1761 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1762 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1763 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1764 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1765 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1766 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1767 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1768 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1769 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1770 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1771 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1772 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1773 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1774 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1775 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1776 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1777 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1778 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1779 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1780 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1781 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1782 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1783 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1784 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1785 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1786 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1787 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1788 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1789 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1790 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1791 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1792 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1793 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1794 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1795 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1796 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1797 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1798 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1799 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1800 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1801 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1802 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1803 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1804 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1805 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1806 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1807 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1808 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1809 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1810 1811 /* Support for Owen devices */ 1812 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1813 1814 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1815 1816 /* Support Lego NXT using pbLua firmware */ 1817 { USB_DEVICE(0x0694, 0xff00), 1818 .driver_info = NOT_A_MODEM, 1819 }, 1820 1821 /* Support for Droids MuIn LCD */ 1822 { USB_DEVICE(0x04d8, 0x000b), 1823 .driver_info = NO_DATA_INTERFACE, 1824 }, 1825 1826#if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1827 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1828 .driver_info = IGNORE_DEVICE, 1829 }, 1830 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1831 .driver_info = IGNORE_DEVICE, 1832 }, 1833#endif 1834 1835 /* control interfaces without any protocol set */ 1836 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1837 USB_CDC_PROTO_NONE) }, 1838 1839 /* control interfaces with various AT-command sets */ 1840 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1841 USB_CDC_ACM_PROTO_AT_V25TER) }, 1842 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1843 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1844 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1845 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1846 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1847 USB_CDC_ACM_PROTO_AT_GSM) }, 1848 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1849 USB_CDC_ACM_PROTO_AT_3G) }, 1850 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1851 USB_CDC_ACM_PROTO_AT_CDMA) }, 1852 1853 { } 1854}; 1855 1856MODULE_DEVICE_TABLE(usb, acm_ids); 1857 1858static struct usb_driver acm_driver = { 1859 .name = "cdc_acm", 1860 .probe = acm_probe, 1861 .disconnect = acm_disconnect, 1862#ifdef CONFIG_PM 1863 .suspend = acm_suspend, 1864 .resume = acm_resume, 1865 .reset_resume = acm_reset_resume, 1866#endif 1867 .id_table = acm_ids, 1868#ifdef CONFIG_PM 1869 .supports_autosuspend = 1, 1870#endif 1871 .disable_hub_initiated_lpm = 1, 1872}; 1873 1874/* 1875 * TTY driver structures. 1876 */ 1877 1878static const struct tty_operations acm_ops = { 1879 .install = acm_tty_install, 1880 .open = acm_tty_open, 1881 .close = acm_tty_close, 1882 .cleanup = acm_tty_cleanup, 1883 .hangup = acm_tty_hangup, 1884 .write = acm_tty_write, 1885 .write_room = acm_tty_write_room, 1886 .ioctl = acm_tty_ioctl, 1887 .throttle = acm_tty_throttle, 1888 .unthrottle = acm_tty_unthrottle, 1889 .chars_in_buffer = acm_tty_chars_in_buffer, 1890 .break_ctl = acm_tty_break_ctl, 1891 .set_termios = acm_tty_set_termios, 1892 .tiocmget = acm_tty_tiocmget, 1893 .tiocmset = acm_tty_tiocmset, 1894}; 1895 1896/* 1897 * Init / exit. 1898 */ 1899 1900static int __init acm_init(void) 1901{ 1902 int retval; 1903 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1904 if (!acm_tty_driver) 1905 return -ENOMEM; 1906 acm_tty_driver->driver_name = "acm", 1907 acm_tty_driver->name = "ttyACM", 1908 acm_tty_driver->major = ACM_TTY_MAJOR, 1909 acm_tty_driver->minor_start = 0, 1910 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1911 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1912 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1913 acm_tty_driver->init_termios = tty_std_termios; 1914 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1915 HUPCL | CLOCAL; 1916 tty_set_operations(acm_tty_driver, &acm_ops); 1917 1918 retval = tty_register_driver(acm_tty_driver); 1919 if (retval) { 1920 put_tty_driver(acm_tty_driver); 1921 return retval; 1922 } 1923 1924 retval = usb_register(&acm_driver); 1925 if (retval) { 1926 tty_unregister_driver(acm_tty_driver); 1927 put_tty_driver(acm_tty_driver); 1928 return retval; 1929 } 1930 1931 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1932 1933 return 0; 1934} 1935 1936static void __exit acm_exit(void) 1937{ 1938 usb_deregister(&acm_driver); 1939 tty_unregister_driver(acm_tty_driver); 1940 put_tty_driver(acm_tty_driver); 1941} 1942 1943module_init(acm_init); 1944module_exit(acm_exit); 1945 1946MODULE_AUTHOR(DRIVER_AUTHOR); 1947MODULE_DESCRIPTION(DRIVER_DESC); 1948MODULE_LICENSE("GPL"); 1949MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 1950