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/idr.h> 50 #include <linux/list.h> 51 52 #include "cdc-acm.h" 53 54 55 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 56 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 57 58 static struct usb_driver acm_driver; 59 static struct tty_driver *acm_tty_driver; 60 61 static DEFINE_IDR(acm_minors); 62 static DEFINE_MUTEX(acm_minors_lock); 63 64 static void acm_tty_set_termios(struct tty_struct *tty, 65 struct ktermios *termios_old); 66 67 /* 68 * acm_minors accessors 69 */ 70 71 /* 72 * Look up an ACM structure by minor. If found and not disconnected, increment 73 * its refcount and return it with its mutex held. 74 */ 75 static struct acm *acm_get_by_minor(unsigned int minor) 76 { 77 struct acm *acm; 78 79 mutex_lock(&acm_minors_lock); 80 acm = idr_find(&acm_minors, minor); 81 if (acm) { 82 mutex_lock(&acm->mutex); 83 if (acm->disconnected) { 84 mutex_unlock(&acm->mutex); 85 acm = NULL; 86 } else { 87 tty_port_get(&acm->port); 88 mutex_unlock(&acm->mutex); 89 } 90 } 91 mutex_unlock(&acm_minors_lock); 92 return acm; 93 } 94 95 /* 96 * Try to find an available minor number and if found, associate it with 'acm'. 97 */ 98 static int acm_alloc_minor(struct acm *acm) 99 { 100 int minor; 101 102 mutex_lock(&acm_minors_lock); 103 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 104 mutex_unlock(&acm_minors_lock); 105 106 return minor; 107 } 108 109 /* Release the minor number associated with 'acm'. */ 110 static void acm_release_minor(struct acm *acm) 111 { 112 mutex_lock(&acm_minors_lock); 113 idr_remove(&acm_minors, acm->minor); 114 mutex_unlock(&acm_minors_lock); 115 } 116 117 /* 118 * Functions for ACM control messages. 119 */ 120 121 static int acm_ctrl_msg(struct acm *acm, int request, int value, 122 void *buf, int len) 123 { 124 int retval; 125 126 retval = usb_autopm_get_interface(acm->control); 127 if (retval) 128 return retval; 129 130 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 131 request, USB_RT_ACM, value, 132 acm->control->altsetting[0].desc.bInterfaceNumber, 133 buf, len, 5000); 134 135 dev_dbg(&acm->control->dev, 136 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 137 __func__, request, value, len, retval); 138 139 usb_autopm_put_interface(acm->control); 140 141 return retval < 0 ? retval : 0; 142 } 143 144 /* devices aren't required to support these requests. 145 * the cdc acm descriptor tells whether they do... 146 */ 147 static inline int acm_set_control(struct acm *acm, int control) 148 { 149 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 150 return -EOPNOTSUPP; 151 152 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 153 control, NULL, 0); 154 } 155 156 #define acm_set_line(acm, line) \ 157 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 158 #define acm_send_break(acm, ms) \ 159 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 160 161 /* 162 * Write buffer management. 163 * All of these assume proper locks taken by the caller. 164 */ 165 166 static int acm_wb_alloc(struct acm *acm) 167 { 168 int i, wbn; 169 struct acm_wb *wb; 170 171 wbn = 0; 172 i = 0; 173 for (;;) { 174 wb = &acm->wb[wbn]; 175 if (!wb->use) { 176 wb->use = 1; 177 return wbn; 178 } 179 wbn = (wbn + 1) % ACM_NW; 180 if (++i >= ACM_NW) 181 return -1; 182 } 183 } 184 185 static int acm_wb_is_avail(struct acm *acm) 186 { 187 int i, n; 188 unsigned long flags; 189 190 n = ACM_NW; 191 spin_lock_irqsave(&acm->write_lock, flags); 192 for (i = 0; i < ACM_NW; i++) 193 n -= acm->wb[i].use; 194 spin_unlock_irqrestore(&acm->write_lock, flags); 195 return n; 196 } 197 198 /* 199 * Finish write. Caller must hold acm->write_lock 200 */ 201 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 202 { 203 wb->use = 0; 204 acm->transmitting--; 205 usb_autopm_put_interface_async(acm->control); 206 } 207 208 /* 209 * Poke write. 210 * 211 * the caller is responsible for locking 212 */ 213 214 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 215 { 216 int rc; 217 218 acm->transmitting++; 219 220 wb->urb->transfer_buffer = wb->buf; 221 wb->urb->transfer_dma = wb->dmah; 222 wb->urb->transfer_buffer_length = wb->len; 223 wb->urb->dev = acm->dev; 224 225 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 226 if (rc < 0) { 227 dev_err(&acm->data->dev, 228 "%s - usb_submit_urb(write bulk) failed: %d\n", 229 __func__, rc); 230 acm_write_done(acm, wb); 231 } 232 return rc; 233 } 234 235 /* 236 * attributes exported through sysfs 237 */ 238 static ssize_t show_caps 239 (struct device *dev, struct device_attribute *attr, char *buf) 240 { 241 struct usb_interface *intf = to_usb_interface(dev); 242 struct acm *acm = usb_get_intfdata(intf); 243 244 return sprintf(buf, "%d", acm->ctrl_caps); 245 } 246 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); 247 248 static ssize_t show_country_codes 249 (struct device *dev, struct device_attribute *attr, char *buf) 250 { 251 struct usb_interface *intf = to_usb_interface(dev); 252 struct acm *acm = usb_get_intfdata(intf); 253 254 memcpy(buf, acm->country_codes, acm->country_code_size); 255 return acm->country_code_size; 256 } 257 258 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); 259 260 static ssize_t show_country_rel_date 261 (struct device *dev, struct device_attribute *attr, char *buf) 262 { 263 struct usb_interface *intf = to_usb_interface(dev); 264 struct acm *acm = usb_get_intfdata(intf); 265 266 return sprintf(buf, "%d", acm->country_rel_date); 267 } 268 269 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); 270 /* 271 * Interrupt handlers for various ACM device responses 272 */ 273 274 /* control interface reports status changes with "interrupt" transfers */ 275 static void acm_ctrl_irq(struct urb *urb) 276 { 277 struct acm *acm = urb->context; 278 struct usb_cdc_notification *dr = urb->transfer_buffer; 279 unsigned char *data; 280 int newctrl; 281 int difference; 282 int retval; 283 int status = urb->status; 284 285 switch (status) { 286 case 0: 287 /* success */ 288 break; 289 case -ECONNRESET: 290 case -ENOENT: 291 case -ESHUTDOWN: 292 /* this urb is terminated, clean up */ 293 dev_dbg(&acm->control->dev, 294 "%s - urb shutting down with status: %d\n", 295 __func__, status); 296 return; 297 default: 298 dev_dbg(&acm->control->dev, 299 "%s - nonzero urb status received: %d\n", 300 __func__, status); 301 goto exit; 302 } 303 304 usb_mark_last_busy(acm->dev); 305 306 data = (unsigned char *)(dr + 1); 307 switch (dr->bNotificationType) { 308 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 309 dev_dbg(&acm->control->dev, "%s - network connection: %d\n", 310 __func__, dr->wValue); 311 break; 312 313 case USB_CDC_NOTIFY_SERIAL_STATE: 314 newctrl = get_unaligned_le16(data); 315 316 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 317 dev_dbg(&acm->control->dev, "%s - calling hangup\n", 318 __func__); 319 tty_port_tty_hangup(&acm->port, false); 320 } 321 322 difference = acm->ctrlin ^ newctrl; 323 spin_lock(&acm->read_lock); 324 acm->ctrlin = newctrl; 325 acm->oldcount = acm->iocount; 326 327 if (difference & ACM_CTRL_DSR) 328 acm->iocount.dsr++; 329 if (difference & ACM_CTRL_BRK) 330 acm->iocount.brk++; 331 if (difference & ACM_CTRL_RI) 332 acm->iocount.rng++; 333 if (difference & ACM_CTRL_DCD) 334 acm->iocount.dcd++; 335 if (difference & ACM_CTRL_FRAMING) 336 acm->iocount.frame++; 337 if (difference & ACM_CTRL_PARITY) 338 acm->iocount.parity++; 339 if (difference & ACM_CTRL_OVERRUN) 340 acm->iocount.overrun++; 341 spin_unlock(&acm->read_lock); 342 343 if (difference) 344 wake_up_all(&acm->wioctl); 345 346 break; 347 348 default: 349 dev_dbg(&acm->control->dev, 350 "%s - unknown notification %d received: index %d " 351 "len %d data0 %d data1 %d\n", 352 __func__, 353 dr->bNotificationType, dr->wIndex, 354 dr->wLength, data[0], data[1]); 355 break; 356 } 357 exit: 358 retval = usb_submit_urb(urb, GFP_ATOMIC); 359 if (retval && retval != -EPERM) 360 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", 361 __func__, retval); 362 } 363 364 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 365 { 366 int res; 367 368 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 369 return 0; 370 371 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index); 372 373 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 374 if (res) { 375 if (res != -EPERM) { 376 dev_err(&acm->data->dev, 377 "%s - usb_submit_urb failed: %d\n", 378 __func__, res); 379 } 380 set_bit(index, &acm->read_urbs_free); 381 return res; 382 } 383 384 return 0; 385 } 386 387 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 388 { 389 int res; 390 int i; 391 392 for (i = 0; i < acm->rx_buflimit; ++i) { 393 res = acm_submit_read_urb(acm, i, mem_flags); 394 if (res) 395 return res; 396 } 397 398 return 0; 399 } 400 401 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 402 { 403 if (!urb->actual_length) 404 return; 405 406 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 407 urb->actual_length); 408 tty_flip_buffer_push(&acm->port); 409 } 410 411 static void acm_read_bulk_callback(struct urb *urb) 412 { 413 struct acm_rb *rb = urb->context; 414 struct acm *acm = rb->instance; 415 unsigned long flags; 416 int status = urb->status; 417 418 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__, 419 rb->index, urb->actual_length); 420 421 if (!acm->dev) { 422 set_bit(rb->index, &acm->read_urbs_free); 423 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 424 return; 425 } 426 427 if (status) { 428 set_bit(rb->index, &acm->read_urbs_free); 429 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n", 430 __func__, status); 431 if ((status != -ENOENT) || (urb->actual_length == 0)) 432 return; 433 } 434 435 usb_mark_last_busy(acm->dev); 436 437 acm_process_read_urb(acm, urb); 438 /* 439 * Unthrottle may run on another CPU which needs to see events 440 * in the same order. Submission has an implict barrier 441 */ 442 smp_mb__before_atomic(); 443 set_bit(rb->index, &acm->read_urbs_free); 444 445 /* throttle device if requested by tty */ 446 spin_lock_irqsave(&acm->read_lock, flags); 447 acm->throttled = acm->throttle_req; 448 if (!acm->throttled) { 449 spin_unlock_irqrestore(&acm->read_lock, flags); 450 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 451 } else { 452 spin_unlock_irqrestore(&acm->read_lock, flags); 453 } 454 } 455 456 /* data interface wrote those outgoing bytes */ 457 static void acm_write_bulk(struct urb *urb) 458 { 459 struct acm_wb *wb = urb->context; 460 struct acm *acm = wb->instance; 461 unsigned long flags; 462 int status = urb->status; 463 464 if (status || (urb->actual_length != urb->transfer_buffer_length)) 465 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n", 466 __func__, 467 urb->actual_length, 468 urb->transfer_buffer_length, 469 status); 470 471 spin_lock_irqsave(&acm->write_lock, flags); 472 acm_write_done(acm, wb); 473 spin_unlock_irqrestore(&acm->write_lock, flags); 474 schedule_work(&acm->work); 475 } 476 477 static void acm_softint(struct work_struct *work) 478 { 479 struct acm *acm = container_of(work, struct acm, work); 480 481 dev_vdbg(&acm->data->dev, "%s\n", __func__); 482 483 tty_port_tty_wakeup(&acm->port); 484 } 485 486 /* 487 * TTY handlers 488 */ 489 490 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 491 { 492 struct acm *acm; 493 int retval; 494 495 dev_dbg(tty->dev, "%s\n", __func__); 496 497 acm = acm_get_by_minor(tty->index); 498 if (!acm) 499 return -ENODEV; 500 501 retval = tty_standard_install(driver, tty); 502 if (retval) 503 goto error_init_termios; 504 505 tty->driver_data = acm; 506 507 return 0; 508 509 error_init_termios: 510 tty_port_put(&acm->port); 511 return retval; 512 } 513 514 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 515 { 516 struct acm *acm = tty->driver_data; 517 518 dev_dbg(tty->dev, "%s\n", __func__); 519 520 return tty_port_open(&acm->port, tty, filp); 521 } 522 523 static void acm_port_dtr_rts(struct tty_port *port, int raise) 524 { 525 struct acm *acm = container_of(port, struct acm, port); 526 int val; 527 int res; 528 529 if (raise) 530 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 531 else 532 val = 0; 533 534 /* FIXME: add missing ctrlout locking throughout driver */ 535 acm->ctrlout = val; 536 537 res = acm_set_control(acm, val); 538 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 539 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 540 } 541 542 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 543 { 544 struct acm *acm = container_of(port, struct acm, port); 545 int retval = -ENODEV; 546 int i; 547 548 dev_dbg(&acm->control->dev, "%s\n", __func__); 549 550 mutex_lock(&acm->mutex); 551 if (acm->disconnected) 552 goto disconnected; 553 554 retval = usb_autopm_get_interface(acm->control); 555 if (retval) 556 goto error_get_interface; 557 558 /* 559 * FIXME: Why do we need this? Allocating 64K of physically contiguous 560 * memory is really nasty... 561 */ 562 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 563 acm->control->needs_remote_wakeup = 1; 564 565 acm->ctrlurb->dev = acm->dev; 566 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 567 if (retval) { 568 dev_err(&acm->control->dev, 569 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 570 goto error_submit_urb; 571 } 572 573 acm_tty_set_termios(tty, NULL); 574 575 /* 576 * Unthrottle device in case the TTY was closed while throttled. 577 */ 578 spin_lock_irq(&acm->read_lock); 579 acm->throttled = 0; 580 acm->throttle_req = 0; 581 spin_unlock_irq(&acm->read_lock); 582 583 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 584 if (retval) 585 goto error_submit_read_urbs; 586 587 usb_autopm_put_interface(acm->control); 588 589 mutex_unlock(&acm->mutex); 590 591 return 0; 592 593 error_submit_read_urbs: 594 for (i = 0; i < acm->rx_buflimit; i++) 595 usb_kill_urb(acm->read_urbs[i]); 596 usb_kill_urb(acm->ctrlurb); 597 error_submit_urb: 598 usb_autopm_put_interface(acm->control); 599 error_get_interface: 600 disconnected: 601 mutex_unlock(&acm->mutex); 602 603 return usb_translate_errors(retval); 604 } 605 606 static void acm_port_destruct(struct tty_port *port) 607 { 608 struct acm *acm = container_of(port, struct acm, port); 609 610 dev_dbg(&acm->control->dev, "%s\n", __func__); 611 612 acm_release_minor(acm); 613 usb_put_intf(acm->control); 614 kfree(acm->country_codes); 615 kfree(acm); 616 } 617 618 static void acm_port_shutdown(struct tty_port *port) 619 { 620 struct acm *acm = container_of(port, struct acm, port); 621 struct urb *urb; 622 struct acm_wb *wb; 623 int i; 624 625 dev_dbg(&acm->control->dev, "%s\n", __func__); 626 627 /* 628 * Need to grab write_lock to prevent race with resume, but no need to 629 * hold it due to the tty-port initialised flag. 630 */ 631 spin_lock_irq(&acm->write_lock); 632 spin_unlock_irq(&acm->write_lock); 633 634 usb_autopm_get_interface_no_resume(acm->control); 635 acm->control->needs_remote_wakeup = 0; 636 usb_autopm_put_interface(acm->control); 637 638 for (;;) { 639 urb = usb_get_from_anchor(&acm->delayed); 640 if (!urb) 641 break; 642 wb = urb->context; 643 wb->use = 0; 644 usb_autopm_put_interface_async(acm->control); 645 } 646 647 usb_kill_urb(acm->ctrlurb); 648 for (i = 0; i < ACM_NW; i++) 649 usb_kill_urb(acm->wb[i].urb); 650 for (i = 0; i < acm->rx_buflimit; i++) 651 usb_kill_urb(acm->read_urbs[i]); 652 } 653 654 static void acm_tty_cleanup(struct tty_struct *tty) 655 { 656 struct acm *acm = tty->driver_data; 657 dev_dbg(&acm->control->dev, "%s\n", __func__); 658 tty_port_put(&acm->port); 659 } 660 661 static void acm_tty_hangup(struct tty_struct *tty) 662 { 663 struct acm *acm = tty->driver_data; 664 dev_dbg(&acm->control->dev, "%s\n", __func__); 665 tty_port_hangup(&acm->port); 666 } 667 668 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 669 { 670 struct acm *acm = tty->driver_data; 671 dev_dbg(&acm->control->dev, "%s\n", __func__); 672 tty_port_close(&acm->port, tty, filp); 673 } 674 675 static int acm_tty_write(struct tty_struct *tty, 676 const unsigned char *buf, int count) 677 { 678 struct acm *acm = tty->driver_data; 679 int stat; 680 unsigned long flags; 681 int wbn; 682 struct acm_wb *wb; 683 684 if (!count) 685 return 0; 686 687 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count); 688 689 spin_lock_irqsave(&acm->write_lock, flags); 690 wbn = acm_wb_alloc(acm); 691 if (wbn < 0) { 692 spin_unlock_irqrestore(&acm->write_lock, flags); 693 return 0; 694 } 695 wb = &acm->wb[wbn]; 696 697 if (!acm->dev) { 698 wb->use = 0; 699 spin_unlock_irqrestore(&acm->write_lock, flags); 700 return -ENODEV; 701 } 702 703 count = (count > acm->writesize) ? acm->writesize : count; 704 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count); 705 memcpy(wb->buf, buf, count); 706 wb->len = count; 707 708 stat = usb_autopm_get_interface_async(acm->control); 709 if (stat) { 710 wb->use = 0; 711 spin_unlock_irqrestore(&acm->write_lock, flags); 712 return stat; 713 } 714 715 if (acm->susp_count) { 716 usb_anchor_urb(wb->urb, &acm->delayed); 717 spin_unlock_irqrestore(&acm->write_lock, flags); 718 return count; 719 } 720 721 stat = acm_start_wb(acm, wb); 722 spin_unlock_irqrestore(&acm->write_lock, flags); 723 724 if (stat < 0) 725 return stat; 726 return count; 727 } 728 729 static int acm_tty_write_room(struct tty_struct *tty) 730 { 731 struct acm *acm = tty->driver_data; 732 /* 733 * Do not let the line discipline to know that we have a reserve, 734 * or it might get too enthusiastic. 735 */ 736 return acm_wb_is_avail(acm) ? acm->writesize : 0; 737 } 738 739 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 740 { 741 struct acm *acm = tty->driver_data; 742 /* 743 * if the device was unplugged then any remaining characters fell out 744 * of the connector ;) 745 */ 746 if (acm->disconnected) 747 return 0; 748 /* 749 * This is inaccurate (overcounts), but it works. 750 */ 751 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 752 } 753 754 static void acm_tty_throttle(struct tty_struct *tty) 755 { 756 struct acm *acm = tty->driver_data; 757 758 spin_lock_irq(&acm->read_lock); 759 acm->throttle_req = 1; 760 spin_unlock_irq(&acm->read_lock); 761 } 762 763 static void acm_tty_unthrottle(struct tty_struct *tty) 764 { 765 struct acm *acm = tty->driver_data; 766 unsigned int was_throttled; 767 768 spin_lock_irq(&acm->read_lock); 769 was_throttled = acm->throttled; 770 acm->throttled = 0; 771 acm->throttle_req = 0; 772 spin_unlock_irq(&acm->read_lock); 773 774 if (was_throttled) 775 acm_submit_read_urbs(acm, GFP_KERNEL); 776 } 777 778 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 779 { 780 struct acm *acm = tty->driver_data; 781 int retval; 782 783 retval = acm_send_break(acm, state ? 0xffff : 0); 784 if (retval < 0) 785 dev_dbg(&acm->control->dev, "%s - send break failed\n", 786 __func__); 787 return retval; 788 } 789 790 static int acm_tty_tiocmget(struct tty_struct *tty) 791 { 792 struct acm *acm = tty->driver_data; 793 794 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 795 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 796 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 797 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 798 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 799 TIOCM_CTS; 800 } 801 802 static int acm_tty_tiocmset(struct tty_struct *tty, 803 unsigned int set, unsigned int clear) 804 { 805 struct acm *acm = tty->driver_data; 806 unsigned int newctrl; 807 808 newctrl = acm->ctrlout; 809 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 810 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 811 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 812 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 813 814 newctrl = (newctrl & ~clear) | set; 815 816 if (acm->ctrlout == newctrl) 817 return 0; 818 return acm_set_control(acm, acm->ctrlout = newctrl); 819 } 820 821 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 822 { 823 struct serial_struct tmp; 824 825 if (!info) 826 return -EINVAL; 827 828 memset(&tmp, 0, sizeof(tmp)); 829 tmp.flags = ASYNC_LOW_LATENCY; 830 tmp.xmit_fifo_size = acm->writesize; 831 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 832 tmp.close_delay = acm->port.close_delay / 10; 833 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 834 ASYNC_CLOSING_WAIT_NONE : 835 acm->port.closing_wait / 10; 836 837 if (copy_to_user(info, &tmp, sizeof(tmp))) 838 return -EFAULT; 839 else 840 return 0; 841 } 842 843 static int set_serial_info(struct acm *acm, 844 struct serial_struct __user *newinfo) 845 { 846 struct serial_struct new_serial; 847 unsigned int closing_wait, close_delay; 848 int retval = 0; 849 850 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 851 return -EFAULT; 852 853 close_delay = new_serial.close_delay * 10; 854 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 855 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 856 857 mutex_lock(&acm->port.mutex); 858 859 if (!capable(CAP_SYS_ADMIN)) { 860 if ((close_delay != acm->port.close_delay) || 861 (closing_wait != acm->port.closing_wait)) 862 retval = -EPERM; 863 else 864 retval = -EOPNOTSUPP; 865 } else { 866 acm->port.close_delay = close_delay; 867 acm->port.closing_wait = closing_wait; 868 } 869 870 mutex_unlock(&acm->port.mutex); 871 return retval; 872 } 873 874 static int wait_serial_change(struct acm *acm, unsigned long arg) 875 { 876 int rv = 0; 877 DECLARE_WAITQUEUE(wait, current); 878 struct async_icount old, new; 879 880 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD )) 881 return -EINVAL; 882 do { 883 spin_lock_irq(&acm->read_lock); 884 old = acm->oldcount; 885 new = acm->iocount; 886 acm->oldcount = new; 887 spin_unlock_irq(&acm->read_lock); 888 889 if ((arg & TIOCM_DSR) && 890 old.dsr != new.dsr) 891 break; 892 if ((arg & TIOCM_CD) && 893 old.dcd != new.dcd) 894 break; 895 if ((arg & TIOCM_RI) && 896 old.rng != new.rng) 897 break; 898 899 add_wait_queue(&acm->wioctl, &wait); 900 set_current_state(TASK_INTERRUPTIBLE); 901 schedule(); 902 remove_wait_queue(&acm->wioctl, &wait); 903 if (acm->disconnected) { 904 if (arg & TIOCM_CD) 905 break; 906 else 907 rv = -ENODEV; 908 } else { 909 if (signal_pending(current)) 910 rv = -ERESTARTSYS; 911 } 912 } while (!rv); 913 914 915 916 return rv; 917 } 918 919 static int get_serial_usage(struct acm *acm, 920 struct serial_icounter_struct __user *count) 921 { 922 struct serial_icounter_struct icount; 923 int rv = 0; 924 925 memset(&icount, 0, sizeof(icount)); 926 icount.dsr = acm->iocount.dsr; 927 icount.rng = acm->iocount.rng; 928 icount.dcd = acm->iocount.dcd; 929 icount.frame = acm->iocount.frame; 930 icount.overrun = acm->iocount.overrun; 931 icount.parity = acm->iocount.parity; 932 icount.brk = acm->iocount.brk; 933 934 if (copy_to_user(count, &icount, sizeof(icount)) > 0) 935 rv = -EFAULT; 936 937 return rv; 938 } 939 940 static int acm_tty_ioctl(struct tty_struct *tty, 941 unsigned int cmd, unsigned long arg) 942 { 943 struct acm *acm = tty->driver_data; 944 int rv = -ENOIOCTLCMD; 945 946 switch (cmd) { 947 case TIOCGSERIAL: /* gets serial port data */ 948 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 949 break; 950 case TIOCSSERIAL: 951 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 952 break; 953 case TIOCMIWAIT: 954 rv = usb_autopm_get_interface(acm->control); 955 if (rv < 0) { 956 rv = -EIO; 957 break; 958 } 959 rv = wait_serial_change(acm, arg); 960 usb_autopm_put_interface(acm->control); 961 break; 962 case TIOCGICOUNT: 963 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg); 964 break; 965 } 966 967 return rv; 968 } 969 970 static void acm_tty_set_termios(struct tty_struct *tty, 971 struct ktermios *termios_old) 972 { 973 struct acm *acm = tty->driver_data; 974 struct ktermios *termios = &tty->termios; 975 struct usb_cdc_line_coding newline; 976 int newctrl = acm->ctrlout; 977 978 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 979 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 980 newline.bParityType = termios->c_cflag & PARENB ? 981 (termios->c_cflag & PARODD ? 1 : 2) + 982 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 983 switch (termios->c_cflag & CSIZE) { 984 case CS5: 985 newline.bDataBits = 5; 986 break; 987 case CS6: 988 newline.bDataBits = 6; 989 break; 990 case CS7: 991 newline.bDataBits = 7; 992 break; 993 case CS8: 994 default: 995 newline.bDataBits = 8; 996 break; 997 } 998 /* FIXME: Needs to clear unsupported bits in the termios */ 999 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1000 1001 if (C_BAUD(tty) == B0) { 1002 newline.dwDTERate = acm->line.dwDTERate; 1003 newctrl &= ~ACM_CTRL_DTR; 1004 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1005 newctrl |= ACM_CTRL_DTR; 1006 } 1007 1008 if (newctrl != acm->ctrlout) 1009 acm_set_control(acm, acm->ctrlout = newctrl); 1010 1011 if (memcmp(&acm->line, &newline, sizeof newline)) { 1012 memcpy(&acm->line, &newline, sizeof newline); 1013 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1014 __func__, 1015 le32_to_cpu(newline.dwDTERate), 1016 newline.bCharFormat, newline.bParityType, 1017 newline.bDataBits); 1018 acm_set_line(acm, &acm->line); 1019 } 1020 } 1021 1022 static const struct tty_port_operations acm_port_ops = { 1023 .dtr_rts = acm_port_dtr_rts, 1024 .shutdown = acm_port_shutdown, 1025 .activate = acm_port_activate, 1026 .destruct = acm_port_destruct, 1027 }; 1028 1029 /* 1030 * USB probe and disconnect routines. 1031 */ 1032 1033 /* Little helpers: write/read buffers free */ 1034 static void acm_write_buffers_free(struct acm *acm) 1035 { 1036 int i; 1037 struct acm_wb *wb; 1038 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1039 1040 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1041 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); 1042 } 1043 1044 static void acm_read_buffers_free(struct acm *acm) 1045 { 1046 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1047 int i; 1048 1049 for (i = 0; i < acm->rx_buflimit; i++) 1050 usb_free_coherent(usb_dev, acm->readsize, 1051 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1052 } 1053 1054 /* Little helper: write buffers allocate */ 1055 static int acm_write_buffers_alloc(struct acm *acm) 1056 { 1057 int i; 1058 struct acm_wb *wb; 1059 1060 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1061 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1062 &wb->dmah); 1063 if (!wb->buf) { 1064 while (i != 0) { 1065 --i; 1066 --wb; 1067 usb_free_coherent(acm->dev, acm->writesize, 1068 wb->buf, wb->dmah); 1069 } 1070 return -ENOMEM; 1071 } 1072 } 1073 return 0; 1074 } 1075 1076 static int acm_probe(struct usb_interface *intf, 1077 const struct usb_device_id *id) 1078 { 1079 struct usb_cdc_union_desc *union_header = NULL; 1080 struct usb_cdc_country_functional_desc *cfd = NULL; 1081 unsigned char *buffer = intf->altsetting->extra; 1082 int buflen = intf->altsetting->extralen; 1083 struct usb_interface *control_interface; 1084 struct usb_interface *data_interface; 1085 struct usb_endpoint_descriptor *epctrl = NULL; 1086 struct usb_endpoint_descriptor *epread = NULL; 1087 struct usb_endpoint_descriptor *epwrite = NULL; 1088 struct usb_device *usb_dev = interface_to_usbdev(intf); 1089 struct acm *acm; 1090 int minor; 1091 int ctrlsize, readsize; 1092 u8 *buf; 1093 u8 ac_management_function = 0; 1094 u8 call_management_function = 0; 1095 int call_interface_num = -1; 1096 int data_interface_num = -1; 1097 unsigned long quirks; 1098 int num_rx_buf; 1099 int i; 1100 unsigned int elength = 0; 1101 int combined_interfaces = 0; 1102 struct device *tty_dev; 1103 int rv = -ENOMEM; 1104 1105 /* normal quirks */ 1106 quirks = (unsigned long)id->driver_info; 1107 1108 if (quirks == IGNORE_DEVICE) 1109 return -ENODEV; 1110 1111 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1112 1113 /* handle quirks deadly to normal probing*/ 1114 if (quirks == NO_UNION_NORMAL) { 1115 data_interface = usb_ifnum_to_if(usb_dev, 1); 1116 control_interface = usb_ifnum_to_if(usb_dev, 0); 1117 goto skip_normal_probe; 1118 } 1119 1120 /* normal probing*/ 1121 if (!buffer) { 1122 dev_err(&intf->dev, "Weird descriptor references\n"); 1123 return -EINVAL; 1124 } 1125 1126 if (!buflen) { 1127 if (intf->cur_altsetting->endpoint && 1128 intf->cur_altsetting->endpoint->extralen && 1129 intf->cur_altsetting->endpoint->extra) { 1130 dev_dbg(&intf->dev, 1131 "Seeking extra descriptors on endpoint\n"); 1132 buflen = intf->cur_altsetting->endpoint->extralen; 1133 buffer = intf->cur_altsetting->endpoint->extra; 1134 } else { 1135 dev_err(&intf->dev, 1136 "Zero length descriptor references\n"); 1137 return -EINVAL; 1138 } 1139 } 1140 1141 while (buflen > 0) { 1142 elength = buffer[0]; 1143 if (!elength) { 1144 dev_err(&intf->dev, "skipping garbage byte\n"); 1145 elength = 1; 1146 goto next_desc; 1147 } 1148 if (buffer[1] != USB_DT_CS_INTERFACE) { 1149 dev_err(&intf->dev, "skipping garbage\n"); 1150 goto next_desc; 1151 } 1152 1153 switch (buffer[2]) { 1154 case USB_CDC_UNION_TYPE: /* we've found it */ 1155 if (elength < sizeof(struct usb_cdc_union_desc)) 1156 goto next_desc; 1157 if (union_header) { 1158 dev_err(&intf->dev, "More than one " 1159 "union descriptor, skipping ...\n"); 1160 goto next_desc; 1161 } 1162 union_header = (struct usb_cdc_union_desc *)buffer; 1163 break; 1164 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ 1165 if (elength < sizeof(struct usb_cdc_country_functional_desc)) 1166 goto next_desc; 1167 cfd = (struct usb_cdc_country_functional_desc *)buffer; 1168 break; 1169 case USB_CDC_HEADER_TYPE: /* maybe check version */ 1170 break; /* for now we ignore it */ 1171 case USB_CDC_ACM_TYPE: 1172 if (elength < 4) 1173 goto next_desc; 1174 ac_management_function = buffer[3]; 1175 break; 1176 case USB_CDC_CALL_MANAGEMENT_TYPE: 1177 if (elength < 5) 1178 goto next_desc; 1179 call_management_function = buffer[3]; 1180 call_interface_num = buffer[4]; 1181 break; 1182 default: 1183 /* 1184 * there are LOTS more CDC descriptors that 1185 * could legitimately be found here. 1186 */ 1187 dev_dbg(&intf->dev, "Ignoring descriptor: " 1188 "type %02x, length %ud\n", 1189 buffer[2], elength); 1190 break; 1191 } 1192 next_desc: 1193 buflen -= elength; 1194 buffer += elength; 1195 } 1196 1197 if (!union_header) { 1198 if (call_interface_num > 0) { 1199 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1200 /* quirks for Droids MuIn LCD */ 1201 if (quirks & NO_DATA_INTERFACE) 1202 data_interface = usb_ifnum_to_if(usb_dev, 0); 1203 else 1204 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); 1205 control_interface = intf; 1206 } else { 1207 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1208 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1209 return -ENODEV; 1210 } else { 1211 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1212 combined_interfaces = 1; 1213 control_interface = data_interface = intf; 1214 goto look_for_collapsed_interface; 1215 } 1216 } 1217 } else { 1218 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1219 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); 1220 } 1221 1222 if (!control_interface || !data_interface) { 1223 dev_dbg(&intf->dev, "no interfaces\n"); 1224 return -ENODEV; 1225 } 1226 1227 if (data_interface_num != call_interface_num) 1228 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1229 1230 if (control_interface == data_interface) { 1231 /* some broken devices designed for windows work this way */ 1232 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1233 combined_interfaces = 1; 1234 /* a popular other OS doesn't use it */ 1235 quirks |= NO_CAP_LINE; 1236 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1237 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1238 return -EINVAL; 1239 } 1240 look_for_collapsed_interface: 1241 for (i = 0; i < 3; i++) { 1242 struct usb_endpoint_descriptor *ep; 1243 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1244 1245 if (usb_endpoint_is_int_in(ep)) 1246 epctrl = ep; 1247 else if (usb_endpoint_is_bulk_out(ep)) 1248 epwrite = ep; 1249 else if (usb_endpoint_is_bulk_in(ep)) 1250 epread = ep; 1251 else 1252 return -EINVAL; 1253 } 1254 if (!epctrl || !epread || !epwrite) 1255 return -ENODEV; 1256 else 1257 goto made_compressed_probe; 1258 } 1259 1260 skip_normal_probe: 1261 1262 /*workaround for switched interfaces */ 1263 if (data_interface->cur_altsetting->desc.bInterfaceClass 1264 != CDC_DATA_INTERFACE_TYPE) { 1265 if (control_interface->cur_altsetting->desc.bInterfaceClass 1266 == CDC_DATA_INTERFACE_TYPE) { 1267 dev_dbg(&intf->dev, 1268 "Your device has switched interfaces.\n"); 1269 swap(control_interface, data_interface); 1270 } else { 1271 return -EINVAL; 1272 } 1273 } 1274 1275 /* Accept probe requests only for the control interface */ 1276 if (!combined_interfaces && intf != control_interface) 1277 return -ENODEV; 1278 1279 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1280 /* valid in this context */ 1281 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1282 return -EBUSY; 1283 } 1284 1285 1286 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1287 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1288 return -EINVAL; 1289 1290 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1291 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1292 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1293 1294 1295 /* workaround for switched endpoints */ 1296 if (!usb_endpoint_dir_in(epread)) { 1297 /* descriptors are swapped */ 1298 dev_dbg(&intf->dev, 1299 "The data interface has switched endpoints\n"); 1300 swap(epread, epwrite); 1301 } 1302 made_compressed_probe: 1303 dev_dbg(&intf->dev, "interfaces are valid\n"); 1304 1305 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1306 if (acm == NULL) 1307 goto alloc_fail; 1308 1309 minor = acm_alloc_minor(acm); 1310 if (minor < 0) { 1311 dev_err(&intf->dev, "no more free acm devices\n"); 1312 kfree(acm); 1313 return -ENODEV; 1314 } 1315 1316 ctrlsize = usb_endpoint_maxp(epctrl); 1317 readsize = usb_endpoint_maxp(epread) * 1318 (quirks == SINGLE_RX_URB ? 1 : 2); 1319 acm->combined_interfaces = combined_interfaces; 1320 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1321 acm->control = control_interface; 1322 acm->data = data_interface; 1323 acm->minor = minor; 1324 acm->dev = usb_dev; 1325 acm->ctrl_caps = ac_management_function; 1326 if (quirks & NO_CAP_LINE) 1327 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1328 acm->ctrlsize = ctrlsize; 1329 acm->readsize = readsize; 1330 acm->rx_buflimit = num_rx_buf; 1331 INIT_WORK(&acm->work, acm_softint); 1332 init_waitqueue_head(&acm->wioctl); 1333 spin_lock_init(&acm->write_lock); 1334 spin_lock_init(&acm->read_lock); 1335 mutex_init(&acm->mutex); 1336 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1337 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1338 if (acm->is_int_ep) 1339 acm->bInterval = epread->bInterval; 1340 tty_port_init(&acm->port); 1341 acm->port.ops = &acm_port_ops; 1342 init_usb_anchor(&acm->delayed); 1343 acm->quirks = quirks; 1344 1345 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1346 if (!buf) 1347 goto alloc_fail2; 1348 acm->ctrl_buffer = buf; 1349 1350 if (acm_write_buffers_alloc(acm) < 0) 1351 goto alloc_fail4; 1352 1353 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1354 if (!acm->ctrlurb) 1355 goto alloc_fail5; 1356 1357 for (i = 0; i < num_rx_buf; i++) { 1358 struct acm_rb *rb = &(acm->read_buffers[i]); 1359 struct urb *urb; 1360 1361 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1362 &rb->dma); 1363 if (!rb->base) 1364 goto alloc_fail6; 1365 rb->index = i; 1366 rb->instance = acm; 1367 1368 urb = usb_alloc_urb(0, GFP_KERNEL); 1369 if (!urb) 1370 goto alloc_fail6; 1371 1372 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1373 urb->transfer_dma = rb->dma; 1374 if (acm->is_int_ep) { 1375 usb_fill_int_urb(urb, acm->dev, 1376 acm->rx_endpoint, 1377 rb->base, 1378 acm->readsize, 1379 acm_read_bulk_callback, rb, 1380 acm->bInterval); 1381 } else { 1382 usb_fill_bulk_urb(urb, acm->dev, 1383 acm->rx_endpoint, 1384 rb->base, 1385 acm->readsize, 1386 acm_read_bulk_callback, rb); 1387 } 1388 1389 acm->read_urbs[i] = urb; 1390 __set_bit(i, &acm->read_urbs_free); 1391 } 1392 for (i = 0; i < ACM_NW; i++) { 1393 struct acm_wb *snd = &(acm->wb[i]); 1394 1395 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1396 if (snd->urb == NULL) 1397 goto alloc_fail7; 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 if (quirks & SEND_ZERO_PACKET) 1409 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1410 snd->instance = acm; 1411 } 1412 1413 usb_set_intfdata(intf, acm); 1414 1415 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1416 if (i < 0) 1417 goto alloc_fail7; 1418 1419 if (cfd) { /* export the country data */ 1420 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1421 if (!acm->country_codes) 1422 goto skip_countries; 1423 acm->country_code_size = cfd->bLength - 4; 1424 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1425 cfd->bLength - 4); 1426 acm->country_rel_date = cfd->iCountryCodeRelDate; 1427 1428 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1429 if (i < 0) { 1430 kfree(acm->country_codes); 1431 acm->country_codes = NULL; 1432 acm->country_code_size = 0; 1433 goto skip_countries; 1434 } 1435 1436 i = device_create_file(&intf->dev, 1437 &dev_attr_iCountryCodeRelDate); 1438 if (i < 0) { 1439 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1440 kfree(acm->country_codes); 1441 acm->country_codes = NULL; 1442 acm->country_code_size = 0; 1443 goto skip_countries; 1444 } 1445 } 1446 1447 skip_countries: 1448 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1449 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1450 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1451 /* works around buggy devices */ 1452 epctrl->bInterval ? epctrl->bInterval : 16); 1453 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1454 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1455 1456 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1457 1458 acm->line.dwDTERate = cpu_to_le32(9600); 1459 acm->line.bDataBits = 8; 1460 acm_set_line(acm, &acm->line); 1461 1462 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1463 usb_set_intfdata(data_interface, acm); 1464 1465 usb_get_intf(control_interface); 1466 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1467 &control_interface->dev); 1468 if (IS_ERR(tty_dev)) { 1469 rv = PTR_ERR(tty_dev); 1470 goto alloc_fail8; 1471 } 1472 1473 if (quirks & CLEAR_HALT_CONDITIONS) { 1474 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress)); 1475 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress)); 1476 } 1477 1478 return 0; 1479 alloc_fail8: 1480 if (acm->country_codes) { 1481 device_remove_file(&acm->control->dev, 1482 &dev_attr_wCountryCodes); 1483 device_remove_file(&acm->control->dev, 1484 &dev_attr_iCountryCodeRelDate); 1485 kfree(acm->country_codes); 1486 } 1487 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1488 alloc_fail7: 1489 usb_set_intfdata(intf, NULL); 1490 for (i = 0; i < ACM_NW; i++) 1491 usb_free_urb(acm->wb[i].urb); 1492 alloc_fail6: 1493 for (i = 0; i < num_rx_buf; i++) 1494 usb_free_urb(acm->read_urbs[i]); 1495 acm_read_buffers_free(acm); 1496 usb_free_urb(acm->ctrlurb); 1497 alloc_fail5: 1498 acm_write_buffers_free(acm); 1499 alloc_fail4: 1500 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1501 alloc_fail2: 1502 acm_release_minor(acm); 1503 kfree(acm); 1504 alloc_fail: 1505 return rv; 1506 } 1507 1508 static void stop_data_traffic(struct acm *acm) 1509 { 1510 int i; 1511 1512 dev_dbg(&acm->control->dev, "%s\n", __func__); 1513 1514 usb_kill_urb(acm->ctrlurb); 1515 for (i = 0; i < ACM_NW; i++) 1516 usb_kill_urb(acm->wb[i].urb); 1517 for (i = 0; i < acm->rx_buflimit; i++) 1518 usb_kill_urb(acm->read_urbs[i]); 1519 1520 cancel_work_sync(&acm->work); 1521 } 1522 1523 static void acm_disconnect(struct usb_interface *intf) 1524 { 1525 struct acm *acm = usb_get_intfdata(intf); 1526 struct usb_device *usb_dev = interface_to_usbdev(intf); 1527 struct tty_struct *tty; 1528 int i; 1529 1530 dev_dbg(&intf->dev, "%s\n", __func__); 1531 1532 /* sibling interface is already cleaning up */ 1533 if (!acm) 1534 return; 1535 1536 mutex_lock(&acm->mutex); 1537 acm->disconnected = true; 1538 if (acm->country_codes) { 1539 device_remove_file(&acm->control->dev, 1540 &dev_attr_wCountryCodes); 1541 device_remove_file(&acm->control->dev, 1542 &dev_attr_iCountryCodeRelDate); 1543 } 1544 wake_up_all(&acm->wioctl); 1545 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1546 usb_set_intfdata(acm->control, NULL); 1547 usb_set_intfdata(acm->data, NULL); 1548 mutex_unlock(&acm->mutex); 1549 1550 tty = tty_port_tty_get(&acm->port); 1551 if (tty) { 1552 tty_vhangup(tty); 1553 tty_kref_put(tty); 1554 } 1555 1556 stop_data_traffic(acm); 1557 1558 tty_unregister_device(acm_tty_driver, acm->minor); 1559 1560 usb_free_urb(acm->ctrlurb); 1561 for (i = 0; i < ACM_NW; i++) 1562 usb_free_urb(acm->wb[i].urb); 1563 for (i = 0; i < acm->rx_buflimit; i++) 1564 usb_free_urb(acm->read_urbs[i]); 1565 acm_write_buffers_free(acm); 1566 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1567 acm_read_buffers_free(acm); 1568 1569 if (!acm->combined_interfaces) 1570 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1571 acm->data : acm->control); 1572 1573 tty_port_put(&acm->port); 1574 } 1575 1576 #ifdef CONFIG_PM 1577 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1578 { 1579 struct acm *acm = usb_get_intfdata(intf); 1580 int cnt; 1581 1582 spin_lock_irq(&acm->write_lock); 1583 if (PMSG_IS_AUTO(message)) { 1584 if (acm->transmitting) { 1585 spin_unlock_irq(&acm->write_lock); 1586 return -EBUSY; 1587 } 1588 } 1589 cnt = acm->susp_count++; 1590 spin_unlock_irq(&acm->write_lock); 1591 1592 if (cnt) 1593 return 0; 1594 1595 stop_data_traffic(acm); 1596 1597 return 0; 1598 } 1599 1600 static int acm_resume(struct usb_interface *intf) 1601 { 1602 struct acm *acm = usb_get_intfdata(intf); 1603 struct urb *urb; 1604 int rv = 0; 1605 1606 spin_lock_irq(&acm->write_lock); 1607 1608 if (--acm->susp_count) 1609 goto out; 1610 1611 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { 1612 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1613 1614 for (;;) { 1615 urb = usb_get_from_anchor(&acm->delayed); 1616 if (!urb) 1617 break; 1618 1619 acm_start_wb(acm, urb->context); 1620 } 1621 1622 /* 1623 * delayed error checking because we must 1624 * do the write path at all cost 1625 */ 1626 if (rv < 0) 1627 goto out; 1628 1629 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1630 } 1631 out: 1632 spin_unlock_irq(&acm->write_lock); 1633 1634 return rv; 1635 } 1636 1637 static int acm_reset_resume(struct usb_interface *intf) 1638 { 1639 struct acm *acm = usb_get_intfdata(intf); 1640 1641 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) 1642 tty_port_tty_hangup(&acm->port, false); 1643 1644 return acm_resume(intf); 1645 } 1646 1647 #endif /* CONFIG_PM */ 1648 1649 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1650 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1651 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1652 USB_CDC_ACM_PROTO_VENDOR) 1653 1654 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1655 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1656 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1657 USB_CDC_ACM_PROTO_VENDOR) 1658 1659 /* 1660 * USB driver structure. 1661 */ 1662 1663 static const struct usb_device_id acm_ids[] = { 1664 /* quirky and broken devices */ 1665 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1666 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1667 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1668 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1669 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1670 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1671 }, 1672 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1673 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1674 }, 1675 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1676 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1677 }, 1678 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1679 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1680 }, 1681 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1682 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1683 }, 1684 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1685 .driver_info = SINGLE_RX_URB, 1686 }, 1687 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1688 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1689 }, 1690 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1691 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1692 }, 1693 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1694 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1695 }, 1696 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1698 }, 1699 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1700 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1701 }, 1702 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1703 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1704 }, 1705 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1706 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1707 }, 1708 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1709 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1710 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1711 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1712 }, 1713 /* Motorola H24 HSPA module: */ 1714 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1715 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1716 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1717 }, 1718 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1719 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1720 }, 1721 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1722 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1723 }, 1724 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1725 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1726 }, 1727 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1728 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1729 }, 1730 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1731 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1732 }, 1733 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1734 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1735 }, 1736 1737 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1738 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1739 data interface instead of 1740 communications interface. 1741 Maybe we should define a new 1742 quirk for this. */ 1743 }, 1744 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1745 .driver_info = NO_UNION_NORMAL, 1746 }, 1747 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1748 .driver_info = NO_UNION_NORMAL, 1749 }, 1750 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1751 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1752 }, 1753 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1754 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1755 }, 1756 1757 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1758 .driver_info = CLEAR_HALT_CONDITIONS, 1759 }, 1760 1761 /* Nokia S60 phones expose two ACM channels. The first is 1762 * a modem and is picked up by the standard AT-command 1763 * information below. The second is 'vendor-specific' but 1764 * is treated as a serial device at the S60 end, so we want 1765 * to expose it on Linux too. */ 1766 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1767 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1768 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1769 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1770 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1771 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1772 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1773 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1774 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1775 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1776 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1777 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1778 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1779 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1780 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1781 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1782 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1783 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1784 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1785 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1786 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1787 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1788 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1789 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1790 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1791 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1792 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1793 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1794 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1795 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1796 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1797 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1798 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1799 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1800 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1801 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1802 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1803 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1804 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1805 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1806 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1807 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1808 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1809 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1810 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1811 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1812 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1813 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1814 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1815 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1816 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1817 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1818 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1820 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1821 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1822 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1823 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1824 1825 /* Support for Owen devices */ 1826 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1827 1828 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1829 1830 /* Support for Droids MuIn LCD */ 1831 { USB_DEVICE(0x04d8, 0x000b), 1832 .driver_info = NO_DATA_INTERFACE, 1833 }, 1834 1835 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1836 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1837 .driver_info = IGNORE_DEVICE, 1838 }, 1839 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1840 .driver_info = IGNORE_DEVICE, 1841 }, 1842 #endif 1843 1844 /*Samsung phone in firmware update mode */ 1845 { USB_DEVICE(0x04e8, 0x685d), 1846 .driver_info = IGNORE_DEVICE, 1847 }, 1848 1849 /* Exclude Infineon Flash Loader utility */ 1850 { USB_DEVICE(0x058b, 0x0041), 1851 .driver_info = IGNORE_DEVICE, 1852 }, 1853 1854 /* control interfaces without any protocol set */ 1855 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1856 USB_CDC_PROTO_NONE) }, 1857 1858 /* control interfaces with various AT-command sets */ 1859 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1860 USB_CDC_ACM_PROTO_AT_V25TER) }, 1861 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1862 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1863 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1864 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1865 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1866 USB_CDC_ACM_PROTO_AT_GSM) }, 1867 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1868 USB_CDC_ACM_PROTO_AT_3G) }, 1869 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1870 USB_CDC_ACM_PROTO_AT_CDMA) }, 1871 1872 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1873 .driver_info = SEND_ZERO_PACKET, 1874 }, 1875 1876 { } 1877 }; 1878 1879 MODULE_DEVICE_TABLE(usb, acm_ids); 1880 1881 static struct usb_driver acm_driver = { 1882 .name = "cdc_acm", 1883 .probe = acm_probe, 1884 .disconnect = acm_disconnect, 1885 #ifdef CONFIG_PM 1886 .suspend = acm_suspend, 1887 .resume = acm_resume, 1888 .reset_resume = acm_reset_resume, 1889 #endif 1890 .id_table = acm_ids, 1891 #ifdef CONFIG_PM 1892 .supports_autosuspend = 1, 1893 #endif 1894 .disable_hub_initiated_lpm = 1, 1895 }; 1896 1897 /* 1898 * TTY driver structures. 1899 */ 1900 1901 static const struct tty_operations acm_ops = { 1902 .install = acm_tty_install, 1903 .open = acm_tty_open, 1904 .close = acm_tty_close, 1905 .cleanup = acm_tty_cleanup, 1906 .hangup = acm_tty_hangup, 1907 .write = acm_tty_write, 1908 .write_room = acm_tty_write_room, 1909 .ioctl = acm_tty_ioctl, 1910 .throttle = acm_tty_throttle, 1911 .unthrottle = acm_tty_unthrottle, 1912 .chars_in_buffer = acm_tty_chars_in_buffer, 1913 .break_ctl = acm_tty_break_ctl, 1914 .set_termios = acm_tty_set_termios, 1915 .tiocmget = acm_tty_tiocmget, 1916 .tiocmset = acm_tty_tiocmset, 1917 }; 1918 1919 /* 1920 * Init / exit. 1921 */ 1922 1923 static int __init acm_init(void) 1924 { 1925 int retval; 1926 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1927 if (!acm_tty_driver) 1928 return -ENOMEM; 1929 acm_tty_driver->driver_name = "acm", 1930 acm_tty_driver->name = "ttyACM", 1931 acm_tty_driver->major = ACM_TTY_MAJOR, 1932 acm_tty_driver->minor_start = 0, 1933 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1934 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1935 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1936 acm_tty_driver->init_termios = tty_std_termios; 1937 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1938 HUPCL | CLOCAL; 1939 tty_set_operations(acm_tty_driver, &acm_ops); 1940 1941 retval = tty_register_driver(acm_tty_driver); 1942 if (retval) { 1943 put_tty_driver(acm_tty_driver); 1944 return retval; 1945 } 1946 1947 retval = usb_register(&acm_driver); 1948 if (retval) { 1949 tty_unregister_driver(acm_tty_driver); 1950 put_tty_driver(acm_tty_driver); 1951 return retval; 1952 } 1953 1954 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1955 1956 return 0; 1957 } 1958 1959 static void __exit acm_exit(void) 1960 { 1961 usb_deregister(&acm_driver); 1962 tty_unregister_driver(acm_tty_driver); 1963 put_tty_driver(acm_tty_driver); 1964 idr_destroy(&acm_minors); 1965 } 1966 1967 module_init(acm_init); 1968 module_exit(acm_exit); 1969 1970 MODULE_AUTHOR(DRIVER_AUTHOR); 1971 MODULE_DESCRIPTION(DRIVER_DESC); 1972 MODULE_LICENSE("GPL"); 1973 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 1974