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/sched/signal.h> 36 #include <linux/errno.h> 37 #include <linux/init.h> 38 #include <linux/slab.h> 39 #include <linux/tty.h> 40 #include <linux/serial.h> 41 #include <linux/tty_driver.h> 42 #include <linux/tty_flip.h> 43 #include <linux/module.h> 44 #include <linux/mutex.h> 45 #include <linux/uaccess.h> 46 #include <linux/usb.h> 47 #include <linux/usb/cdc.h> 48 #include <asm/byteorder.h> 49 #include <asm/unaligned.h> 50 #include <linux/idr.h> 51 #include <linux/list.h> 52 53 #include "cdc-acm.h" 54 55 56 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 57 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 58 59 static struct usb_driver acm_driver; 60 static struct tty_driver *acm_tty_driver; 61 62 static DEFINE_IDR(acm_minors); 63 static DEFINE_MUTEX(acm_minors_lock); 64 65 static void acm_tty_set_termios(struct tty_struct *tty, 66 struct ktermios *termios_old); 67 68 /* 69 * acm_minors accessors 70 */ 71 72 /* 73 * Look up an ACM structure by minor. If found and not disconnected, increment 74 * its refcount and return it with its mutex held. 75 */ 76 static struct acm *acm_get_by_minor(unsigned int minor) 77 { 78 struct acm *acm; 79 80 mutex_lock(&acm_minors_lock); 81 acm = idr_find(&acm_minors, minor); 82 if (acm) { 83 mutex_lock(&acm->mutex); 84 if (acm->disconnected) { 85 mutex_unlock(&acm->mutex); 86 acm = NULL; 87 } else { 88 tty_port_get(&acm->port); 89 mutex_unlock(&acm->mutex); 90 } 91 } 92 mutex_unlock(&acm_minors_lock); 93 return acm; 94 } 95 96 /* 97 * Try to find an available minor number and if found, associate it with 'acm'. 98 */ 99 static int acm_alloc_minor(struct acm *acm) 100 { 101 int minor; 102 103 mutex_lock(&acm_minors_lock); 104 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 105 mutex_unlock(&acm_minors_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_minors_lock); 114 idr_remove(&acm_minors, acm->minor); 115 mutex_unlock(&acm_minors_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 static inline int acm_set_control(struct acm *acm, int control) 149 { 150 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 151 return -EOPNOTSUPP; 152 153 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 154 control, NULL, 0); 155 } 156 157 #define acm_set_line(acm, line) \ 158 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 159 #define acm_send_break(acm, ms) \ 160 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 161 162 static void acm_kill_urbs(struct acm *acm) 163 { 164 int i; 165 166 usb_kill_urb(acm->ctrlurb); 167 for (i = 0; i < ACM_NW; i++) 168 usb_kill_urb(acm->wb[i].urb); 169 for (i = 0; i < acm->rx_buflimit; i++) 170 usb_kill_urb(acm->read_urbs[i]); 171 } 172 173 /* 174 * Write buffer management. 175 * All of these assume proper locks taken by the caller. 176 */ 177 178 static int acm_wb_alloc(struct acm *acm) 179 { 180 int i, wbn; 181 struct acm_wb *wb; 182 183 wbn = 0; 184 i = 0; 185 for (;;) { 186 wb = &acm->wb[wbn]; 187 if (!wb->use) { 188 wb->use = 1; 189 return wbn; 190 } 191 wbn = (wbn + 1) % ACM_NW; 192 if (++i >= ACM_NW) 193 return -1; 194 } 195 } 196 197 static int acm_wb_is_avail(struct acm *acm) 198 { 199 int i, n; 200 unsigned long flags; 201 202 n = ACM_NW; 203 spin_lock_irqsave(&acm->write_lock, flags); 204 for (i = 0; i < ACM_NW; i++) 205 n -= acm->wb[i].use; 206 spin_unlock_irqrestore(&acm->write_lock, flags); 207 return n; 208 } 209 210 /* 211 * Finish write. Caller must hold acm->write_lock 212 */ 213 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 214 { 215 wb->use = 0; 216 acm->transmitting--; 217 usb_autopm_put_interface_async(acm->control); 218 } 219 220 /* 221 * Poke write. 222 * 223 * the caller is responsible for locking 224 */ 225 226 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 227 { 228 int rc; 229 230 acm->transmitting++; 231 232 wb->urb->transfer_buffer = wb->buf; 233 wb->urb->transfer_dma = wb->dmah; 234 wb->urb->transfer_buffer_length = wb->len; 235 wb->urb->dev = acm->dev; 236 237 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 238 if (rc < 0) { 239 dev_err(&acm->data->dev, 240 "%s - usb_submit_urb(write bulk) failed: %d\n", 241 __func__, rc); 242 acm_write_done(acm, wb); 243 } 244 return rc; 245 } 246 247 /* 248 * attributes exported through sysfs 249 */ 250 static ssize_t show_caps 251 (struct device *dev, struct device_attribute *attr, char *buf) 252 { 253 struct usb_interface *intf = to_usb_interface(dev); 254 struct acm *acm = usb_get_intfdata(intf); 255 256 return sprintf(buf, "%d", acm->ctrl_caps); 257 } 258 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); 259 260 static ssize_t show_country_codes 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 memcpy(buf, acm->country_codes, acm->country_code_size); 267 return acm->country_code_size; 268 } 269 270 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); 271 272 static ssize_t show_country_rel_date 273 (struct device *dev, struct device_attribute *attr, char *buf) 274 { 275 struct usb_interface *intf = to_usb_interface(dev); 276 struct acm *acm = usb_get_intfdata(intf); 277 278 return sprintf(buf, "%d", acm->country_rel_date); 279 } 280 281 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); 282 /* 283 * Interrupt handlers for various ACM device responses 284 */ 285 286 /* control interface reports status changes with "interrupt" transfers */ 287 static void acm_ctrl_irq(struct urb *urb) 288 { 289 struct acm *acm = urb->context; 290 struct usb_cdc_notification *dr = urb->transfer_buffer; 291 unsigned char *data; 292 int newctrl; 293 int difference; 294 int retval; 295 int status = urb->status; 296 297 switch (status) { 298 case 0: 299 /* success */ 300 break; 301 case -ECONNRESET: 302 case -ENOENT: 303 case -ESHUTDOWN: 304 /* this urb is terminated, clean up */ 305 dev_dbg(&acm->control->dev, 306 "%s - urb shutting down with status: %d\n", 307 __func__, status); 308 return; 309 default: 310 dev_dbg(&acm->control->dev, 311 "%s - nonzero urb status received: %d\n", 312 __func__, status); 313 goto exit; 314 } 315 316 usb_mark_last_busy(acm->dev); 317 318 data = (unsigned char *)(dr + 1); 319 switch (dr->bNotificationType) { 320 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 321 dev_dbg(&acm->control->dev, 322 "%s - network connection: %d\n", __func__, dr->wValue); 323 break; 324 325 case USB_CDC_NOTIFY_SERIAL_STATE: 326 newctrl = get_unaligned_le16(data); 327 328 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 329 dev_dbg(&acm->control->dev, 330 "%s - calling hangup\n", __func__); 331 tty_port_tty_hangup(&acm->port, false); 332 } 333 334 difference = acm->ctrlin ^ newctrl; 335 spin_lock(&acm->read_lock); 336 acm->ctrlin = newctrl; 337 acm->oldcount = acm->iocount; 338 339 if (difference & ACM_CTRL_DSR) 340 acm->iocount.dsr++; 341 if (difference & ACM_CTRL_BRK) 342 acm->iocount.brk++; 343 if (difference & ACM_CTRL_RI) 344 acm->iocount.rng++; 345 if (difference & ACM_CTRL_DCD) 346 acm->iocount.dcd++; 347 if (difference & ACM_CTRL_FRAMING) 348 acm->iocount.frame++; 349 if (difference & ACM_CTRL_PARITY) 350 acm->iocount.parity++; 351 if (difference & ACM_CTRL_OVERRUN) 352 acm->iocount.overrun++; 353 spin_unlock(&acm->read_lock); 354 355 if (difference) 356 wake_up_all(&acm->wioctl); 357 358 break; 359 360 default: 361 dev_dbg(&acm->control->dev, 362 "%s - unknown notification %d received: index %d " 363 "len %d data0 %d data1 %d\n", 364 __func__, 365 dr->bNotificationType, dr->wIndex, 366 dr->wLength, data[0], data[1]); 367 break; 368 } 369 exit: 370 retval = usb_submit_urb(urb, GFP_ATOMIC); 371 if (retval && retval != -EPERM) 372 dev_err(&acm->control->dev, 373 "%s - usb_submit_urb failed: %d\n", __func__, retval); 374 } 375 376 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 377 { 378 int res; 379 380 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 381 return 0; 382 383 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 384 if (res) { 385 if (res != -EPERM) { 386 dev_err(&acm->data->dev, 387 "urb %d failed submission with %d\n", 388 index, res); 389 } 390 set_bit(index, &acm->read_urbs_free); 391 return res; 392 } else { 393 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 394 } 395 396 return 0; 397 } 398 399 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 400 { 401 int res; 402 int i; 403 404 for (i = 0; i < acm->rx_buflimit; ++i) { 405 res = acm_submit_read_urb(acm, i, mem_flags); 406 if (res) 407 return res; 408 } 409 410 return 0; 411 } 412 413 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 414 { 415 if (!urb->actual_length) 416 return; 417 418 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 419 urb->actual_length); 420 tty_flip_buffer_push(&acm->port); 421 } 422 423 static void acm_read_bulk_callback(struct urb *urb) 424 { 425 struct acm_rb *rb = urb->context; 426 struct acm *acm = rb->instance; 427 unsigned long flags; 428 int status = urb->status; 429 430 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 431 rb->index, urb->actual_length, status); 432 433 set_bit(rb->index, &acm->read_urbs_free); 434 435 if (!acm->dev) { 436 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 437 return; 438 } 439 440 switch (status) { 441 case 0: 442 usb_mark_last_busy(acm->dev); 443 acm_process_read_urb(acm, urb); 444 break; 445 case -EPIPE: 446 set_bit(EVENT_RX_STALL, &acm->flags); 447 schedule_work(&acm->work); 448 return; 449 case -ENOENT: 450 case -ECONNRESET: 451 case -ESHUTDOWN: 452 dev_dbg(&acm->data->dev, 453 "%s - urb shutting down with status: %d\n", 454 __func__, status); 455 return; 456 default: 457 dev_dbg(&acm->data->dev, 458 "%s - nonzero urb status received: %d\n", 459 __func__, status); 460 break; 461 } 462 463 /* 464 * Unthrottle may run on another CPU which needs to see events 465 * in the same order. Submission has an implict barrier 466 */ 467 smp_mb__before_atomic(); 468 469 /* throttle device if requested by tty */ 470 spin_lock_irqsave(&acm->read_lock, flags); 471 acm->throttled = acm->throttle_req; 472 if (!acm->throttled) { 473 spin_unlock_irqrestore(&acm->read_lock, flags); 474 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 475 } else { 476 spin_unlock_irqrestore(&acm->read_lock, flags); 477 } 478 } 479 480 /* data interface wrote those outgoing bytes */ 481 static void acm_write_bulk(struct urb *urb) 482 { 483 struct acm_wb *wb = urb->context; 484 struct acm *acm = wb->instance; 485 unsigned long flags; 486 int status = urb->status; 487 488 if (status || (urb->actual_length != urb->transfer_buffer_length)) 489 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 490 urb->actual_length, 491 urb->transfer_buffer_length, 492 status); 493 494 spin_lock_irqsave(&acm->write_lock, flags); 495 acm_write_done(acm, wb); 496 spin_unlock_irqrestore(&acm->write_lock, flags); 497 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 498 schedule_work(&acm->work); 499 } 500 501 static void acm_softint(struct work_struct *work) 502 { 503 int i; 504 struct acm *acm = container_of(work, struct acm, work); 505 506 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 507 if (!(usb_autopm_get_interface(acm->data))) { 508 for (i = 0; i < acm->rx_buflimit; i++) 509 usb_kill_urb(acm->read_urbs[i]); 510 usb_clear_halt(acm->dev, acm->in); 511 acm_submit_read_urbs(acm, GFP_KERNEL); 512 usb_autopm_put_interface(acm->data); 513 } 514 clear_bit(EVENT_RX_STALL, &acm->flags); 515 } 516 517 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) { 518 tty_port_tty_wakeup(&acm->port); 519 clear_bit(EVENT_TTY_WAKEUP, &acm->flags); 520 } 521 } 522 523 /* 524 * TTY handlers 525 */ 526 527 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 528 { 529 struct acm *acm; 530 int retval; 531 532 acm = acm_get_by_minor(tty->index); 533 if (!acm) 534 return -ENODEV; 535 536 retval = tty_standard_install(driver, tty); 537 if (retval) 538 goto error_init_termios; 539 540 tty->driver_data = acm; 541 542 return 0; 543 544 error_init_termios: 545 tty_port_put(&acm->port); 546 return retval; 547 } 548 549 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 550 { 551 struct acm *acm = tty->driver_data; 552 553 return tty_port_open(&acm->port, tty, filp); 554 } 555 556 static void acm_port_dtr_rts(struct tty_port *port, int raise) 557 { 558 struct acm *acm = container_of(port, struct acm, port); 559 int val; 560 int res; 561 562 if (raise) 563 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 564 else 565 val = 0; 566 567 /* FIXME: add missing ctrlout locking throughout driver */ 568 acm->ctrlout = val; 569 570 res = acm_set_control(acm, val); 571 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 572 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 573 } 574 575 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 576 { 577 struct acm *acm = container_of(port, struct acm, port); 578 int retval = -ENODEV; 579 int i; 580 581 mutex_lock(&acm->mutex); 582 if (acm->disconnected) 583 goto disconnected; 584 585 retval = usb_autopm_get_interface(acm->control); 586 if (retval) 587 goto error_get_interface; 588 589 /* 590 * FIXME: Why do we need this? Allocating 64K of physically contiguous 591 * memory is really nasty... 592 */ 593 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 594 acm->control->needs_remote_wakeup = 1; 595 596 acm->ctrlurb->dev = acm->dev; 597 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 598 if (retval) { 599 dev_err(&acm->control->dev, 600 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 601 goto error_submit_urb; 602 } 603 604 acm_tty_set_termios(tty, NULL); 605 606 /* 607 * Unthrottle device in case the TTY was closed while throttled. 608 */ 609 spin_lock_irq(&acm->read_lock); 610 acm->throttled = 0; 611 acm->throttle_req = 0; 612 spin_unlock_irq(&acm->read_lock); 613 614 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 615 if (retval) 616 goto error_submit_read_urbs; 617 618 usb_autopm_put_interface(acm->control); 619 620 mutex_unlock(&acm->mutex); 621 622 return 0; 623 624 error_submit_read_urbs: 625 for (i = 0; i < acm->rx_buflimit; i++) 626 usb_kill_urb(acm->read_urbs[i]); 627 usb_kill_urb(acm->ctrlurb); 628 error_submit_urb: 629 usb_autopm_put_interface(acm->control); 630 error_get_interface: 631 disconnected: 632 mutex_unlock(&acm->mutex); 633 634 return usb_translate_errors(retval); 635 } 636 637 static void acm_port_destruct(struct tty_port *port) 638 { 639 struct acm *acm = container_of(port, struct acm, port); 640 641 acm_release_minor(acm); 642 usb_put_intf(acm->control); 643 kfree(acm->country_codes); 644 kfree(acm); 645 } 646 647 static void acm_port_shutdown(struct tty_port *port) 648 { 649 struct acm *acm = container_of(port, struct acm, port); 650 struct urb *urb; 651 struct acm_wb *wb; 652 653 /* 654 * Need to grab write_lock to prevent race with resume, but no need to 655 * hold it due to the tty-port initialised flag. 656 */ 657 spin_lock_irq(&acm->write_lock); 658 spin_unlock_irq(&acm->write_lock); 659 660 usb_autopm_get_interface_no_resume(acm->control); 661 acm->control->needs_remote_wakeup = 0; 662 usb_autopm_put_interface(acm->control); 663 664 for (;;) { 665 urb = usb_get_from_anchor(&acm->delayed); 666 if (!urb) 667 break; 668 wb = urb->context; 669 wb->use = 0; 670 usb_autopm_put_interface_async(acm->control); 671 } 672 673 acm_kill_urbs(acm); 674 } 675 676 static void acm_tty_cleanup(struct tty_struct *tty) 677 { 678 struct acm *acm = tty->driver_data; 679 680 tty_port_put(&acm->port); 681 } 682 683 static void acm_tty_hangup(struct tty_struct *tty) 684 { 685 struct acm *acm = tty->driver_data; 686 687 tty_port_hangup(&acm->port); 688 } 689 690 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 691 { 692 struct acm *acm = tty->driver_data; 693 694 tty_port_close(&acm->port, tty, filp); 695 } 696 697 static int acm_tty_write(struct tty_struct *tty, 698 const unsigned char *buf, int count) 699 { 700 struct acm *acm = tty->driver_data; 701 int stat; 702 unsigned long flags; 703 int wbn; 704 struct acm_wb *wb; 705 706 if (!count) 707 return 0; 708 709 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 710 711 spin_lock_irqsave(&acm->write_lock, flags); 712 wbn = acm_wb_alloc(acm); 713 if (wbn < 0) { 714 spin_unlock_irqrestore(&acm->write_lock, flags); 715 return 0; 716 } 717 wb = &acm->wb[wbn]; 718 719 if (!acm->dev) { 720 wb->use = 0; 721 spin_unlock_irqrestore(&acm->write_lock, flags); 722 return -ENODEV; 723 } 724 725 count = (count > acm->writesize) ? acm->writesize : count; 726 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 727 memcpy(wb->buf, buf, count); 728 wb->len = count; 729 730 stat = usb_autopm_get_interface_async(acm->control); 731 if (stat) { 732 wb->use = 0; 733 spin_unlock_irqrestore(&acm->write_lock, flags); 734 return stat; 735 } 736 737 if (acm->susp_count) { 738 if (acm->putbuffer) { 739 /* now to preserve order */ 740 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed); 741 acm->putbuffer = NULL; 742 } 743 usb_anchor_urb(wb->urb, &acm->delayed); 744 spin_unlock_irqrestore(&acm->write_lock, flags); 745 return count; 746 } else { 747 if (acm->putbuffer) { 748 /* at this point there is no good way to handle errors */ 749 acm_start_wb(acm, acm->putbuffer); 750 acm->putbuffer = NULL; 751 } 752 } 753 754 stat = acm_start_wb(acm, wb); 755 spin_unlock_irqrestore(&acm->write_lock, flags); 756 757 if (stat < 0) 758 return stat; 759 return count; 760 } 761 762 static void acm_tty_flush_chars(struct tty_struct *tty) 763 { 764 struct acm *acm = tty->driver_data; 765 struct acm_wb *cur = acm->putbuffer; 766 int err; 767 unsigned long flags; 768 769 if (!cur) /* nothing to do */ 770 return; 771 772 acm->putbuffer = NULL; 773 err = usb_autopm_get_interface_async(acm->control); 774 spin_lock_irqsave(&acm->write_lock, flags); 775 if (err < 0) { 776 cur->use = 0; 777 acm->putbuffer = cur; 778 goto out; 779 } 780 781 if (acm->susp_count) 782 usb_anchor_urb(cur->urb, &acm->delayed); 783 else 784 acm_start_wb(acm, cur); 785 out: 786 spin_unlock_irqrestore(&acm->write_lock, flags); 787 return; 788 } 789 790 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch) 791 { 792 struct acm *acm = tty->driver_data; 793 struct acm_wb *cur; 794 int wbn; 795 unsigned long flags; 796 797 overflow: 798 cur = acm->putbuffer; 799 if (!cur) { 800 spin_lock_irqsave(&acm->write_lock, flags); 801 wbn = acm_wb_alloc(acm); 802 if (wbn >= 0) { 803 cur = &acm->wb[wbn]; 804 acm->putbuffer = cur; 805 } 806 spin_unlock_irqrestore(&acm->write_lock, flags); 807 if (!cur) 808 return 0; 809 } 810 811 if (cur->len == acm->writesize) { 812 acm_tty_flush_chars(tty); 813 goto overflow; 814 } 815 816 cur->buf[cur->len++] = ch; 817 return 1; 818 } 819 820 static int acm_tty_write_room(struct tty_struct *tty) 821 { 822 struct acm *acm = tty->driver_data; 823 /* 824 * Do not let the line discipline to know that we have a reserve, 825 * or it might get too enthusiastic. 826 */ 827 return acm_wb_is_avail(acm) ? acm->writesize : 0; 828 } 829 830 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 831 { 832 struct acm *acm = tty->driver_data; 833 /* 834 * if the device was unplugged then any remaining characters fell out 835 * of the connector ;) 836 */ 837 if (acm->disconnected) 838 return 0; 839 /* 840 * This is inaccurate (overcounts), but it works. 841 */ 842 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 843 } 844 845 static void acm_tty_throttle(struct tty_struct *tty) 846 { 847 struct acm *acm = tty->driver_data; 848 849 spin_lock_irq(&acm->read_lock); 850 acm->throttle_req = 1; 851 spin_unlock_irq(&acm->read_lock); 852 } 853 854 static void acm_tty_unthrottle(struct tty_struct *tty) 855 { 856 struct acm *acm = tty->driver_data; 857 unsigned int was_throttled; 858 859 spin_lock_irq(&acm->read_lock); 860 was_throttled = acm->throttled; 861 acm->throttled = 0; 862 acm->throttle_req = 0; 863 spin_unlock_irq(&acm->read_lock); 864 865 if (was_throttled) 866 acm_submit_read_urbs(acm, GFP_KERNEL); 867 } 868 869 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 870 { 871 struct acm *acm = tty->driver_data; 872 int retval; 873 874 retval = acm_send_break(acm, state ? 0xffff : 0); 875 if (retval < 0) 876 dev_dbg(&acm->control->dev, 877 "%s - send break failed\n", __func__); 878 return retval; 879 } 880 881 static int acm_tty_tiocmget(struct tty_struct *tty) 882 { 883 struct acm *acm = tty->driver_data; 884 885 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 886 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 887 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 888 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 889 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 890 TIOCM_CTS; 891 } 892 893 static int acm_tty_tiocmset(struct tty_struct *tty, 894 unsigned int set, unsigned int clear) 895 { 896 struct acm *acm = tty->driver_data; 897 unsigned int newctrl; 898 899 newctrl = acm->ctrlout; 900 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 901 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 902 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 903 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 904 905 newctrl = (newctrl & ~clear) | set; 906 907 if (acm->ctrlout == newctrl) 908 return 0; 909 return acm_set_control(acm, acm->ctrlout = newctrl); 910 } 911 912 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 913 { 914 struct serial_struct tmp; 915 916 memset(&tmp, 0, sizeof(tmp)); 917 tmp.xmit_fifo_size = acm->writesize; 918 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 919 tmp.close_delay = acm->port.close_delay / 10; 920 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 921 ASYNC_CLOSING_WAIT_NONE : 922 acm->port.closing_wait / 10; 923 924 if (copy_to_user(info, &tmp, sizeof(tmp))) 925 return -EFAULT; 926 else 927 return 0; 928 } 929 930 static int set_serial_info(struct acm *acm, 931 struct serial_struct __user *newinfo) 932 { 933 struct serial_struct new_serial; 934 unsigned int closing_wait, close_delay; 935 int retval = 0; 936 937 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 938 return -EFAULT; 939 940 close_delay = new_serial.close_delay * 10; 941 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 942 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 943 944 mutex_lock(&acm->port.mutex); 945 946 if (!capable(CAP_SYS_ADMIN)) { 947 if ((close_delay != acm->port.close_delay) || 948 (closing_wait != acm->port.closing_wait)) 949 retval = -EPERM; 950 else 951 retval = -EOPNOTSUPP; 952 } else { 953 acm->port.close_delay = close_delay; 954 acm->port.closing_wait = closing_wait; 955 } 956 957 mutex_unlock(&acm->port.mutex); 958 return retval; 959 } 960 961 static int wait_serial_change(struct acm *acm, unsigned long arg) 962 { 963 int rv = 0; 964 DECLARE_WAITQUEUE(wait, current); 965 struct async_icount old, new; 966 967 do { 968 spin_lock_irq(&acm->read_lock); 969 old = acm->oldcount; 970 new = acm->iocount; 971 acm->oldcount = new; 972 spin_unlock_irq(&acm->read_lock); 973 974 if ((arg & TIOCM_DSR) && 975 old.dsr != new.dsr) 976 break; 977 if ((arg & TIOCM_CD) && 978 old.dcd != new.dcd) 979 break; 980 if ((arg & TIOCM_RI) && 981 old.rng != new.rng) 982 break; 983 984 add_wait_queue(&acm->wioctl, &wait); 985 set_current_state(TASK_INTERRUPTIBLE); 986 schedule(); 987 remove_wait_queue(&acm->wioctl, &wait); 988 if (acm->disconnected) { 989 if (arg & TIOCM_CD) 990 break; 991 else 992 rv = -ENODEV; 993 } else { 994 if (signal_pending(current)) 995 rv = -ERESTARTSYS; 996 } 997 } while (!rv); 998 999 1000 1001 return rv; 1002 } 1003 1004 static int acm_tty_get_icount(struct tty_struct *tty, 1005 struct serial_icounter_struct *icount) 1006 { 1007 struct acm *acm = tty->driver_data; 1008 1009 icount->dsr = acm->iocount.dsr; 1010 icount->rng = acm->iocount.rng; 1011 icount->dcd = acm->iocount.dcd; 1012 icount->frame = acm->iocount.frame; 1013 icount->overrun = acm->iocount.overrun; 1014 icount->parity = acm->iocount.parity; 1015 icount->brk = acm->iocount.brk; 1016 1017 return 0; 1018 } 1019 1020 static int acm_tty_ioctl(struct tty_struct *tty, 1021 unsigned int cmd, unsigned long arg) 1022 { 1023 struct acm *acm = tty->driver_data; 1024 int rv = -ENOIOCTLCMD; 1025 1026 switch (cmd) { 1027 case TIOCGSERIAL: /* gets serial port data */ 1028 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 1029 break; 1030 case TIOCSSERIAL: 1031 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 1032 break; 1033 case TIOCMIWAIT: 1034 rv = usb_autopm_get_interface(acm->control); 1035 if (rv < 0) { 1036 rv = -EIO; 1037 break; 1038 } 1039 rv = wait_serial_change(acm, arg); 1040 usb_autopm_put_interface(acm->control); 1041 break; 1042 } 1043 1044 return rv; 1045 } 1046 1047 static void acm_tty_set_termios(struct tty_struct *tty, 1048 struct ktermios *termios_old) 1049 { 1050 struct acm *acm = tty->driver_data; 1051 struct ktermios *termios = &tty->termios; 1052 struct usb_cdc_line_coding newline; 1053 int newctrl = acm->ctrlout; 1054 1055 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1056 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1057 newline.bParityType = termios->c_cflag & PARENB ? 1058 (termios->c_cflag & PARODD ? 1 : 2) + 1059 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1060 switch (termios->c_cflag & CSIZE) { 1061 case CS5: 1062 newline.bDataBits = 5; 1063 break; 1064 case CS6: 1065 newline.bDataBits = 6; 1066 break; 1067 case CS7: 1068 newline.bDataBits = 7; 1069 break; 1070 case CS8: 1071 default: 1072 newline.bDataBits = 8; 1073 break; 1074 } 1075 /* FIXME: Needs to clear unsupported bits in the termios */ 1076 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1077 1078 if (C_BAUD(tty) == B0) { 1079 newline.dwDTERate = acm->line.dwDTERate; 1080 newctrl &= ~ACM_CTRL_DTR; 1081 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1082 newctrl |= ACM_CTRL_DTR; 1083 } 1084 1085 if (newctrl != acm->ctrlout) 1086 acm_set_control(acm, acm->ctrlout = newctrl); 1087 1088 if (memcmp(&acm->line, &newline, sizeof newline)) { 1089 memcpy(&acm->line, &newline, sizeof newline); 1090 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1091 __func__, 1092 le32_to_cpu(newline.dwDTERate), 1093 newline.bCharFormat, newline.bParityType, 1094 newline.bDataBits); 1095 acm_set_line(acm, &acm->line); 1096 } 1097 } 1098 1099 static const struct tty_port_operations acm_port_ops = { 1100 .dtr_rts = acm_port_dtr_rts, 1101 .shutdown = acm_port_shutdown, 1102 .activate = acm_port_activate, 1103 .destruct = acm_port_destruct, 1104 }; 1105 1106 /* 1107 * USB probe and disconnect routines. 1108 */ 1109 1110 /* Little helpers: write/read buffers free */ 1111 static void acm_write_buffers_free(struct acm *acm) 1112 { 1113 int i; 1114 struct acm_wb *wb; 1115 1116 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1117 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1118 } 1119 1120 static void acm_read_buffers_free(struct acm *acm) 1121 { 1122 int i; 1123 1124 for (i = 0; i < acm->rx_buflimit; i++) 1125 usb_free_coherent(acm->dev, acm->readsize, 1126 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1127 } 1128 1129 /* Little helper: write buffers allocate */ 1130 static int acm_write_buffers_alloc(struct acm *acm) 1131 { 1132 int i; 1133 struct acm_wb *wb; 1134 1135 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1136 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1137 &wb->dmah); 1138 if (!wb->buf) { 1139 while (i != 0) { 1140 --i; 1141 --wb; 1142 usb_free_coherent(acm->dev, acm->writesize, 1143 wb->buf, wb->dmah); 1144 } 1145 return -ENOMEM; 1146 } 1147 } 1148 return 0; 1149 } 1150 1151 static int acm_probe(struct usb_interface *intf, 1152 const struct usb_device_id *id) 1153 { 1154 struct usb_cdc_union_desc *union_header = NULL; 1155 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1156 unsigned char *buffer = intf->altsetting->extra; 1157 int buflen = intf->altsetting->extralen; 1158 struct usb_interface *control_interface; 1159 struct usb_interface *data_interface; 1160 struct usb_endpoint_descriptor *epctrl = NULL; 1161 struct usb_endpoint_descriptor *epread = NULL; 1162 struct usb_endpoint_descriptor *epwrite = NULL; 1163 struct usb_device *usb_dev = interface_to_usbdev(intf); 1164 struct usb_cdc_parsed_header h; 1165 struct acm *acm; 1166 int minor; 1167 int ctrlsize, readsize; 1168 u8 *buf; 1169 int call_intf_num = -1; 1170 int data_intf_num = -1; 1171 unsigned long quirks; 1172 int num_rx_buf; 1173 int i; 1174 int combined_interfaces = 0; 1175 struct device *tty_dev; 1176 int rv = -ENOMEM; 1177 1178 /* normal quirks */ 1179 quirks = (unsigned long)id->driver_info; 1180 1181 if (quirks == IGNORE_DEVICE) 1182 return -ENODEV; 1183 1184 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1185 1186 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1187 1188 /* handle quirks deadly to normal probing*/ 1189 if (quirks == NO_UNION_NORMAL) { 1190 data_interface = usb_ifnum_to_if(usb_dev, 1); 1191 control_interface = usb_ifnum_to_if(usb_dev, 0); 1192 /* we would crash */ 1193 if (!data_interface || !control_interface) 1194 return -ENODEV; 1195 goto skip_normal_probe; 1196 } 1197 1198 /* normal probing*/ 1199 if (!buffer) { 1200 dev_err(&intf->dev, "Weird descriptor references\n"); 1201 return -EINVAL; 1202 } 1203 1204 if (!intf->cur_altsetting) 1205 return -EINVAL; 1206 1207 if (!buflen) { 1208 if (intf->cur_altsetting->endpoint && 1209 intf->cur_altsetting->endpoint->extralen && 1210 intf->cur_altsetting->endpoint->extra) { 1211 dev_dbg(&intf->dev, 1212 "Seeking extra descriptors on endpoint\n"); 1213 buflen = intf->cur_altsetting->endpoint->extralen; 1214 buffer = intf->cur_altsetting->endpoint->extra; 1215 } else { 1216 dev_err(&intf->dev, 1217 "Zero length descriptor references\n"); 1218 return -EINVAL; 1219 } 1220 } 1221 1222 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1223 union_header = h.usb_cdc_union_desc; 1224 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1225 if (cmgmd) 1226 call_intf_num = cmgmd->bDataInterface; 1227 1228 if (!union_header) { 1229 if (call_intf_num > 0) { 1230 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1231 /* quirks for Droids MuIn LCD */ 1232 if (quirks & NO_DATA_INTERFACE) { 1233 data_interface = usb_ifnum_to_if(usb_dev, 0); 1234 } else { 1235 data_intf_num = call_intf_num; 1236 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1237 } 1238 control_interface = intf; 1239 } else { 1240 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1241 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1242 return -ENODEV; 1243 } else { 1244 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1245 combined_interfaces = 1; 1246 control_interface = data_interface = intf; 1247 goto look_for_collapsed_interface; 1248 } 1249 } 1250 } else { 1251 data_intf_num = union_header->bSlaveInterface0; 1252 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1253 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1254 } 1255 1256 if (!control_interface || !data_interface) { 1257 dev_dbg(&intf->dev, "no interfaces\n"); 1258 return -ENODEV; 1259 } 1260 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1261 return -ENODEV; 1262 1263 if (data_intf_num != call_intf_num) 1264 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1265 1266 if (control_interface == data_interface) { 1267 /* some broken devices designed for windows work this way */ 1268 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1269 combined_interfaces = 1; 1270 /* a popular other OS doesn't use it */ 1271 quirks |= NO_CAP_LINE; 1272 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1273 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1274 return -EINVAL; 1275 } 1276 look_for_collapsed_interface: 1277 for (i = 0; i < 3; i++) { 1278 struct usb_endpoint_descriptor *ep; 1279 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1280 1281 if (usb_endpoint_is_int_in(ep)) 1282 epctrl = ep; 1283 else if (usb_endpoint_is_bulk_out(ep)) 1284 epwrite = ep; 1285 else if (usb_endpoint_is_bulk_in(ep)) 1286 epread = ep; 1287 else 1288 return -EINVAL; 1289 } 1290 if (!epctrl || !epread || !epwrite) 1291 return -ENODEV; 1292 else 1293 goto made_compressed_probe; 1294 } 1295 1296 skip_normal_probe: 1297 1298 /*workaround for switched interfaces */ 1299 if (data_interface->cur_altsetting->desc.bInterfaceClass 1300 != CDC_DATA_INTERFACE_TYPE) { 1301 if (control_interface->cur_altsetting->desc.bInterfaceClass 1302 == CDC_DATA_INTERFACE_TYPE) { 1303 dev_dbg(&intf->dev, 1304 "Your device has switched interfaces.\n"); 1305 swap(control_interface, data_interface); 1306 } else { 1307 return -EINVAL; 1308 } 1309 } 1310 1311 /* Accept probe requests only for the control interface */ 1312 if (!combined_interfaces && intf != control_interface) 1313 return -ENODEV; 1314 1315 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1316 /* valid in this context */ 1317 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1318 return -EBUSY; 1319 } 1320 1321 1322 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1323 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1324 return -EINVAL; 1325 1326 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1327 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1328 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1329 1330 1331 /* workaround for switched endpoints */ 1332 if (!usb_endpoint_dir_in(epread)) { 1333 /* descriptors are swapped */ 1334 dev_dbg(&intf->dev, 1335 "The data interface has switched endpoints\n"); 1336 swap(epread, epwrite); 1337 } 1338 made_compressed_probe: 1339 dev_dbg(&intf->dev, "interfaces are valid\n"); 1340 1341 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1342 if (acm == NULL) 1343 goto alloc_fail; 1344 1345 minor = acm_alloc_minor(acm); 1346 if (minor < 0) 1347 goto alloc_fail1; 1348 1349 ctrlsize = usb_endpoint_maxp(epctrl); 1350 readsize = usb_endpoint_maxp(epread) * 1351 (quirks == SINGLE_RX_URB ? 1 : 2); 1352 acm->combined_interfaces = combined_interfaces; 1353 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1354 acm->control = control_interface; 1355 acm->data = data_interface; 1356 acm->minor = minor; 1357 acm->dev = usb_dev; 1358 if (h.usb_cdc_acm_descriptor) 1359 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1360 if (quirks & NO_CAP_LINE) 1361 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1362 acm->ctrlsize = ctrlsize; 1363 acm->readsize = readsize; 1364 acm->rx_buflimit = num_rx_buf; 1365 INIT_WORK(&acm->work, acm_softint); 1366 init_waitqueue_head(&acm->wioctl); 1367 spin_lock_init(&acm->write_lock); 1368 spin_lock_init(&acm->read_lock); 1369 mutex_init(&acm->mutex); 1370 if (usb_endpoint_xfer_int(epread)) { 1371 acm->bInterval = epread->bInterval; 1372 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1373 } else { 1374 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1375 } 1376 if (usb_endpoint_xfer_int(epwrite)) 1377 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1378 else 1379 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1380 tty_port_init(&acm->port); 1381 acm->port.ops = &acm_port_ops; 1382 init_usb_anchor(&acm->delayed); 1383 acm->quirks = quirks; 1384 1385 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1386 if (!buf) 1387 goto alloc_fail2; 1388 acm->ctrl_buffer = buf; 1389 1390 if (acm_write_buffers_alloc(acm) < 0) 1391 goto alloc_fail4; 1392 1393 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1394 if (!acm->ctrlurb) 1395 goto alloc_fail5; 1396 1397 for (i = 0; i < num_rx_buf; i++) { 1398 struct acm_rb *rb = &(acm->read_buffers[i]); 1399 struct urb *urb; 1400 1401 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1402 &rb->dma); 1403 if (!rb->base) 1404 goto alloc_fail6; 1405 rb->index = i; 1406 rb->instance = acm; 1407 1408 urb = usb_alloc_urb(0, GFP_KERNEL); 1409 if (!urb) 1410 goto alloc_fail6; 1411 1412 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1413 urb->transfer_dma = rb->dma; 1414 if (usb_endpoint_xfer_int(epread)) 1415 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1416 acm->readsize, 1417 acm_read_bulk_callback, rb, 1418 acm->bInterval); 1419 else 1420 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1421 acm->readsize, 1422 acm_read_bulk_callback, rb); 1423 1424 acm->read_urbs[i] = urb; 1425 __set_bit(i, &acm->read_urbs_free); 1426 } 1427 for (i = 0; i < ACM_NW; i++) { 1428 struct acm_wb *snd = &(acm->wb[i]); 1429 1430 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1431 if (snd->urb == NULL) 1432 goto alloc_fail7; 1433 1434 if (usb_endpoint_xfer_int(epwrite)) 1435 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1436 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1437 else 1438 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1439 NULL, acm->writesize, acm_write_bulk, snd); 1440 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1441 if (quirks & SEND_ZERO_PACKET) 1442 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1443 snd->instance = acm; 1444 } 1445 1446 usb_set_intfdata(intf, acm); 1447 1448 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1449 if (i < 0) 1450 goto alloc_fail7; 1451 1452 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1453 struct usb_cdc_country_functional_desc * cfd = 1454 h.usb_cdc_country_functional_desc; 1455 1456 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1457 if (!acm->country_codes) 1458 goto skip_countries; 1459 acm->country_code_size = cfd->bLength - 4; 1460 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1461 cfd->bLength - 4); 1462 acm->country_rel_date = cfd->iCountryCodeRelDate; 1463 1464 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1465 if (i < 0) { 1466 kfree(acm->country_codes); 1467 acm->country_codes = NULL; 1468 acm->country_code_size = 0; 1469 goto skip_countries; 1470 } 1471 1472 i = device_create_file(&intf->dev, 1473 &dev_attr_iCountryCodeRelDate); 1474 if (i < 0) { 1475 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1476 kfree(acm->country_codes); 1477 acm->country_codes = NULL; 1478 acm->country_code_size = 0; 1479 goto skip_countries; 1480 } 1481 } 1482 1483 skip_countries: 1484 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1485 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1486 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1487 /* works around buggy devices */ 1488 epctrl->bInterval ? epctrl->bInterval : 16); 1489 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1490 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1491 1492 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1493 1494 acm->line.dwDTERate = cpu_to_le32(9600); 1495 acm->line.bDataBits = 8; 1496 acm_set_line(acm, &acm->line); 1497 1498 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1499 usb_set_intfdata(data_interface, acm); 1500 1501 usb_get_intf(control_interface); 1502 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1503 &control_interface->dev); 1504 if (IS_ERR(tty_dev)) { 1505 rv = PTR_ERR(tty_dev); 1506 goto alloc_fail8; 1507 } 1508 1509 if (quirks & CLEAR_HALT_CONDITIONS) { 1510 usb_clear_halt(usb_dev, acm->in); 1511 usb_clear_halt(usb_dev, acm->out); 1512 } 1513 1514 return 0; 1515 alloc_fail8: 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 kfree(acm->country_codes); 1522 } 1523 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1524 alloc_fail7: 1525 usb_set_intfdata(intf, NULL); 1526 for (i = 0; i < ACM_NW; i++) 1527 usb_free_urb(acm->wb[i].urb); 1528 alloc_fail6: 1529 for (i = 0; i < num_rx_buf; i++) 1530 usb_free_urb(acm->read_urbs[i]); 1531 acm_read_buffers_free(acm); 1532 usb_free_urb(acm->ctrlurb); 1533 alloc_fail5: 1534 acm_write_buffers_free(acm); 1535 alloc_fail4: 1536 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1537 alloc_fail2: 1538 acm_release_minor(acm); 1539 alloc_fail1: 1540 kfree(acm); 1541 alloc_fail: 1542 return rv; 1543 } 1544 1545 static void acm_disconnect(struct usb_interface *intf) 1546 { 1547 struct acm *acm = usb_get_intfdata(intf); 1548 struct tty_struct *tty; 1549 1550 /* sibling interface is already cleaning up */ 1551 if (!acm) 1552 return; 1553 1554 mutex_lock(&acm->mutex); 1555 acm->disconnected = true; 1556 if (acm->country_codes) { 1557 device_remove_file(&acm->control->dev, 1558 &dev_attr_wCountryCodes); 1559 device_remove_file(&acm->control->dev, 1560 &dev_attr_iCountryCodeRelDate); 1561 } 1562 wake_up_all(&acm->wioctl); 1563 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1564 usb_set_intfdata(acm->control, NULL); 1565 usb_set_intfdata(acm->data, NULL); 1566 mutex_unlock(&acm->mutex); 1567 1568 tty = tty_port_tty_get(&acm->port); 1569 if (tty) { 1570 tty_vhangup(tty); 1571 tty_kref_put(tty); 1572 } 1573 1574 acm_kill_urbs(acm); 1575 cancel_work_sync(&acm->work); 1576 1577 tty_unregister_device(acm_tty_driver, acm->minor); 1578 1579 acm_write_buffers_free(acm); 1580 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1581 acm_read_buffers_free(acm); 1582 1583 if (!acm->combined_interfaces) 1584 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1585 acm->data : acm->control); 1586 1587 tty_port_put(&acm->port); 1588 } 1589 1590 #ifdef CONFIG_PM 1591 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1592 { 1593 struct acm *acm = usb_get_intfdata(intf); 1594 int cnt; 1595 1596 spin_lock_irq(&acm->write_lock); 1597 if (PMSG_IS_AUTO(message)) { 1598 if (acm->transmitting) { 1599 spin_unlock_irq(&acm->write_lock); 1600 return -EBUSY; 1601 } 1602 } 1603 cnt = acm->susp_count++; 1604 spin_unlock_irq(&acm->write_lock); 1605 1606 if (cnt) 1607 return 0; 1608 1609 acm_kill_urbs(acm); 1610 cancel_work_sync(&acm->work); 1611 1612 return 0; 1613 } 1614 1615 static int acm_resume(struct usb_interface *intf) 1616 { 1617 struct acm *acm = usb_get_intfdata(intf); 1618 struct urb *urb; 1619 int rv = 0; 1620 1621 spin_lock_irq(&acm->write_lock); 1622 1623 if (--acm->susp_count) 1624 goto out; 1625 1626 if (tty_port_initialized(&acm->port)) { 1627 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1628 1629 for (;;) { 1630 urb = usb_get_from_anchor(&acm->delayed); 1631 if (!urb) 1632 break; 1633 1634 acm_start_wb(acm, urb->context); 1635 } 1636 1637 /* 1638 * delayed error checking because we must 1639 * do the write path at all cost 1640 */ 1641 if (rv < 0) 1642 goto out; 1643 1644 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1645 } 1646 out: 1647 spin_unlock_irq(&acm->write_lock); 1648 1649 return rv; 1650 } 1651 1652 static int acm_reset_resume(struct usb_interface *intf) 1653 { 1654 struct acm *acm = usb_get_intfdata(intf); 1655 1656 if (tty_port_initialized(&acm->port)) 1657 tty_port_tty_hangup(&acm->port, false); 1658 1659 return acm_resume(intf); 1660 } 1661 1662 #endif /* CONFIG_PM */ 1663 1664 static int acm_pre_reset(struct usb_interface *intf) 1665 { 1666 struct acm *acm = usb_get_intfdata(intf); 1667 1668 clear_bit(EVENT_RX_STALL, &acm->flags); 1669 1670 return 0; 1671 } 1672 1673 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1674 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1675 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1676 USB_CDC_ACM_PROTO_VENDOR) 1677 1678 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1679 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1680 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1681 USB_CDC_ACM_PROTO_VENDOR) 1682 1683 /* 1684 * USB driver structure. 1685 */ 1686 1687 static const struct usb_device_id acm_ids[] = { 1688 /* quirky and broken devices */ 1689 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1690 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1691 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1692 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1693 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1694 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1695 }, 1696 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1698 }, 1699 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1700 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1701 }, 1702 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1703 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1704 }, 1705 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1706 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1707 }, 1708 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1709 .driver_info = SINGLE_RX_URB, 1710 }, 1711 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1712 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1713 }, 1714 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1715 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1716 }, 1717 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1718 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1719 }, 1720 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1721 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1722 }, 1723 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1724 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1725 }, 1726 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1727 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1728 }, 1729 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1730 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1731 }, 1732 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1733 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1734 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1735 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1736 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1737 }, 1738 /* Motorola H24 HSPA module: */ 1739 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1740 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1741 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1742 }, 1743 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1744 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1745 }, 1746 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1747 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1748 }, 1749 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1750 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1751 }, 1752 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1753 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1754 }, 1755 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1756 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1757 }, 1758 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1759 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1760 }, 1761 1762 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1763 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1764 data interface instead of 1765 communications interface. 1766 Maybe we should define a new 1767 quirk for this. */ 1768 }, 1769 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1770 .driver_info = NO_UNION_NORMAL, 1771 }, 1772 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1773 .driver_info = NO_UNION_NORMAL, 1774 }, 1775 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1776 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1777 }, 1778 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1779 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1780 }, 1781 1782 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1783 .driver_info = CLEAR_HALT_CONDITIONS, 1784 }, 1785 1786 /* Nokia S60 phones expose two ACM channels. The first is 1787 * a modem and is picked up by the standard AT-command 1788 * information below. The second is 'vendor-specific' but 1789 * is treated as a serial device at the S60 end, so we want 1790 * to expose it on Linux too. */ 1791 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1792 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1793 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1794 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1795 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1796 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1797 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1798 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1799 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1800 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1801 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1802 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1803 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1804 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1805 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1806 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1807 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1808 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1809 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1810 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1811 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1812 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1813 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1814 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1815 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1816 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1817 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1818 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1820 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1821 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1822 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1823 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1824 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1825 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1826 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1827 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1828 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1829 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1830 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1848 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1849 1850 /* Support for Owen devices */ 1851 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1852 1853 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1854 1855 /* Support for Droids MuIn LCD */ 1856 { USB_DEVICE(0x04d8, 0x000b), 1857 .driver_info = NO_DATA_INTERFACE, 1858 }, 1859 1860 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1861 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1862 .driver_info = IGNORE_DEVICE, 1863 }, 1864 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1865 .driver_info = IGNORE_DEVICE, 1866 }, 1867 #endif 1868 1869 /*Samsung phone in firmware update mode */ 1870 { USB_DEVICE(0x04e8, 0x685d), 1871 .driver_info = IGNORE_DEVICE, 1872 }, 1873 1874 /* Exclude Infineon Flash Loader utility */ 1875 { USB_DEVICE(0x058b, 0x0041), 1876 .driver_info = IGNORE_DEVICE, 1877 }, 1878 1879 /* control interfaces without any protocol set */ 1880 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1881 USB_CDC_PROTO_NONE) }, 1882 1883 /* control interfaces with various AT-command sets */ 1884 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1885 USB_CDC_ACM_PROTO_AT_V25TER) }, 1886 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1887 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1888 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1889 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1890 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1891 USB_CDC_ACM_PROTO_AT_GSM) }, 1892 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1893 USB_CDC_ACM_PROTO_AT_3G) }, 1894 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1895 USB_CDC_ACM_PROTO_AT_CDMA) }, 1896 1897 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1898 .driver_info = SEND_ZERO_PACKET, 1899 }, 1900 1901 { } 1902 }; 1903 1904 MODULE_DEVICE_TABLE(usb, acm_ids); 1905 1906 static struct usb_driver acm_driver = { 1907 .name = "cdc_acm", 1908 .probe = acm_probe, 1909 .disconnect = acm_disconnect, 1910 #ifdef CONFIG_PM 1911 .suspend = acm_suspend, 1912 .resume = acm_resume, 1913 .reset_resume = acm_reset_resume, 1914 #endif 1915 .pre_reset = acm_pre_reset, 1916 .id_table = acm_ids, 1917 #ifdef CONFIG_PM 1918 .supports_autosuspend = 1, 1919 #endif 1920 .disable_hub_initiated_lpm = 1, 1921 }; 1922 1923 /* 1924 * TTY driver structures. 1925 */ 1926 1927 static const struct tty_operations acm_ops = { 1928 .install = acm_tty_install, 1929 .open = acm_tty_open, 1930 .close = acm_tty_close, 1931 .cleanup = acm_tty_cleanup, 1932 .hangup = acm_tty_hangup, 1933 .write = acm_tty_write, 1934 .put_char = acm_tty_put_char, 1935 .flush_chars = acm_tty_flush_chars, 1936 .write_room = acm_tty_write_room, 1937 .ioctl = acm_tty_ioctl, 1938 .throttle = acm_tty_throttle, 1939 .unthrottle = acm_tty_unthrottle, 1940 .chars_in_buffer = acm_tty_chars_in_buffer, 1941 .break_ctl = acm_tty_break_ctl, 1942 .set_termios = acm_tty_set_termios, 1943 .tiocmget = acm_tty_tiocmget, 1944 .tiocmset = acm_tty_tiocmset, 1945 .get_icount = acm_tty_get_icount, 1946 }; 1947 1948 /* 1949 * Init / exit. 1950 */ 1951 1952 static int __init acm_init(void) 1953 { 1954 int retval; 1955 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1956 if (!acm_tty_driver) 1957 return -ENOMEM; 1958 acm_tty_driver->driver_name = "acm", 1959 acm_tty_driver->name = "ttyACM", 1960 acm_tty_driver->major = ACM_TTY_MAJOR, 1961 acm_tty_driver->minor_start = 0, 1962 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1963 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1964 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1965 acm_tty_driver->init_termios = tty_std_termios; 1966 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1967 HUPCL | CLOCAL; 1968 tty_set_operations(acm_tty_driver, &acm_ops); 1969 1970 retval = tty_register_driver(acm_tty_driver); 1971 if (retval) { 1972 put_tty_driver(acm_tty_driver); 1973 return retval; 1974 } 1975 1976 retval = usb_register(&acm_driver); 1977 if (retval) { 1978 tty_unregister_driver(acm_tty_driver); 1979 put_tty_driver(acm_tty_driver); 1980 return retval; 1981 } 1982 1983 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1984 1985 return 0; 1986 } 1987 1988 static void __exit acm_exit(void) 1989 { 1990 usb_deregister(&acm_driver); 1991 tty_unregister_driver(acm_tty_driver); 1992 put_tty_driver(acm_tty_driver); 1993 idr_destroy(&acm_minors); 1994 } 1995 1996 module_init(acm_init); 1997 module_exit(acm_exit); 1998 1999 MODULE_AUTHOR(DRIVER_AUTHOR); 2000 MODULE_DESCRIPTION(DRIVER_DESC); 2001 MODULE_LICENSE("GPL"); 2002 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2003