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