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 return; 432 } 433 434 usb_mark_last_busy(acm->dev); 435 436 acm_process_read_urb(acm, urb); 437 /* 438 * Unthrottle may run on another CPU which needs to see events 439 * in the same order. Submission has an implict barrier 440 */ 441 smp_mb__before_atomic(); 442 set_bit(rb->index, &acm->read_urbs_free); 443 444 /* throttle device if requested by tty */ 445 spin_lock_irqsave(&acm->read_lock, flags); 446 acm->throttled = acm->throttle_req; 447 if (!acm->throttled) { 448 spin_unlock_irqrestore(&acm->read_lock, flags); 449 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 450 } else { 451 spin_unlock_irqrestore(&acm->read_lock, flags); 452 } 453 } 454 455 /* data interface wrote those outgoing bytes */ 456 static void acm_write_bulk(struct urb *urb) 457 { 458 struct acm_wb *wb = urb->context; 459 struct acm *acm = wb->instance; 460 unsigned long flags; 461 int status = urb->status; 462 463 if (status || (urb->actual_length != urb->transfer_buffer_length)) 464 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n", 465 __func__, 466 urb->actual_length, 467 urb->transfer_buffer_length, 468 status); 469 470 spin_lock_irqsave(&acm->write_lock, flags); 471 acm_write_done(acm, wb); 472 spin_unlock_irqrestore(&acm->write_lock, flags); 473 schedule_work(&acm->work); 474 } 475 476 static void acm_softint(struct work_struct *work) 477 { 478 struct acm *acm = container_of(work, struct acm, work); 479 480 dev_vdbg(&acm->data->dev, "%s\n", __func__); 481 482 tty_port_tty_wakeup(&acm->port); 483 } 484 485 /* 486 * TTY handlers 487 */ 488 489 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 490 { 491 struct acm *acm; 492 int retval; 493 494 dev_dbg(tty->dev, "%s\n", __func__); 495 496 acm = acm_get_by_minor(tty->index); 497 if (!acm) 498 return -ENODEV; 499 500 retval = tty_standard_install(driver, tty); 501 if (retval) 502 goto error_init_termios; 503 504 tty->driver_data = acm; 505 506 return 0; 507 508 error_init_termios: 509 tty_port_put(&acm->port); 510 return retval; 511 } 512 513 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 514 { 515 struct acm *acm = tty->driver_data; 516 517 dev_dbg(tty->dev, "%s\n", __func__); 518 519 return tty_port_open(&acm->port, tty, filp); 520 } 521 522 static void acm_port_dtr_rts(struct tty_port *port, int raise) 523 { 524 struct acm *acm = container_of(port, struct acm, port); 525 int val; 526 int res; 527 528 if (raise) 529 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 530 else 531 val = 0; 532 533 /* FIXME: add missing ctrlout locking throughout driver */ 534 acm->ctrlout = val; 535 536 res = acm_set_control(acm, val); 537 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 538 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 539 } 540 541 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 542 { 543 struct acm *acm = container_of(port, struct acm, port); 544 int retval = -ENODEV; 545 int i; 546 547 dev_dbg(&acm->control->dev, "%s\n", __func__); 548 549 mutex_lock(&acm->mutex); 550 if (acm->disconnected) 551 goto disconnected; 552 553 retval = usb_autopm_get_interface(acm->control); 554 if (retval) 555 goto error_get_interface; 556 557 /* 558 * FIXME: Why do we need this? Allocating 64K of physically contiguous 559 * memory is really nasty... 560 */ 561 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 562 acm->control->needs_remote_wakeup = 1; 563 564 acm->ctrlurb->dev = acm->dev; 565 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 566 if (retval) { 567 dev_err(&acm->control->dev, 568 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 569 goto error_submit_urb; 570 } 571 572 acm_tty_set_termios(tty, NULL); 573 574 /* 575 * Unthrottle device in case the TTY was closed while throttled. 576 */ 577 spin_lock_irq(&acm->read_lock); 578 acm->throttled = 0; 579 acm->throttle_req = 0; 580 spin_unlock_irq(&acm->read_lock); 581 582 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 583 if (retval) 584 goto error_submit_read_urbs; 585 586 usb_autopm_put_interface(acm->control); 587 588 mutex_unlock(&acm->mutex); 589 590 return 0; 591 592 error_submit_read_urbs: 593 for (i = 0; i < acm->rx_buflimit; i++) 594 usb_kill_urb(acm->read_urbs[i]); 595 usb_kill_urb(acm->ctrlurb); 596 error_submit_urb: 597 usb_autopm_put_interface(acm->control); 598 error_get_interface: 599 disconnected: 600 mutex_unlock(&acm->mutex); 601 602 return usb_translate_errors(retval); 603 } 604 605 static void acm_port_destruct(struct tty_port *port) 606 { 607 struct acm *acm = container_of(port, struct acm, port); 608 609 dev_dbg(&acm->control->dev, "%s\n", __func__); 610 611 acm_release_minor(acm); 612 usb_put_intf(acm->control); 613 kfree(acm->country_codes); 614 kfree(acm); 615 } 616 617 static void acm_port_shutdown(struct tty_port *port) 618 { 619 struct acm *acm = container_of(port, struct acm, port); 620 struct urb *urb; 621 struct acm_wb *wb; 622 int i; 623 624 dev_dbg(&acm->control->dev, "%s\n", __func__); 625 626 /* 627 * Need to grab write_lock to prevent race with resume, but no need to 628 * hold it due to the tty-port initialised flag. 629 */ 630 spin_lock_irq(&acm->write_lock); 631 spin_unlock_irq(&acm->write_lock); 632 633 usb_autopm_get_interface_no_resume(acm->control); 634 acm->control->needs_remote_wakeup = 0; 635 usb_autopm_put_interface(acm->control); 636 637 for (;;) { 638 urb = usb_get_from_anchor(&acm->delayed); 639 if (!urb) 640 break; 641 wb = urb->context; 642 wb->use = 0; 643 usb_autopm_put_interface_async(acm->control); 644 } 645 646 usb_kill_urb(acm->ctrlurb); 647 for (i = 0; i < ACM_NW; i++) 648 usb_kill_urb(acm->wb[i].urb); 649 for (i = 0; i < acm->rx_buflimit; i++) 650 usb_kill_urb(acm->read_urbs[i]); 651 } 652 653 static void acm_tty_cleanup(struct tty_struct *tty) 654 { 655 struct acm *acm = tty->driver_data; 656 dev_dbg(&acm->control->dev, "%s\n", __func__); 657 tty_port_put(&acm->port); 658 } 659 660 static void acm_tty_hangup(struct tty_struct *tty) 661 { 662 struct acm *acm = tty->driver_data; 663 dev_dbg(&acm->control->dev, "%s\n", __func__); 664 tty_port_hangup(&acm->port); 665 } 666 667 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 668 { 669 struct acm *acm = tty->driver_data; 670 dev_dbg(&acm->control->dev, "%s\n", __func__); 671 tty_port_close(&acm->port, tty, filp); 672 } 673 674 static int acm_tty_write(struct tty_struct *tty, 675 const unsigned char *buf, int count) 676 { 677 struct acm *acm = tty->driver_data; 678 int stat; 679 unsigned long flags; 680 int wbn; 681 struct acm_wb *wb; 682 683 if (!count) 684 return 0; 685 686 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count); 687 688 spin_lock_irqsave(&acm->write_lock, flags); 689 wbn = acm_wb_alloc(acm); 690 if (wbn < 0) { 691 spin_unlock_irqrestore(&acm->write_lock, flags); 692 return 0; 693 } 694 wb = &acm->wb[wbn]; 695 696 if (!acm->dev) { 697 wb->use = 0; 698 spin_unlock_irqrestore(&acm->write_lock, flags); 699 return -ENODEV; 700 } 701 702 count = (count > acm->writesize) ? acm->writesize : count; 703 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count); 704 memcpy(wb->buf, buf, count); 705 wb->len = count; 706 707 stat = usb_autopm_get_interface_async(acm->control); 708 if (stat) { 709 wb->use = 0; 710 spin_unlock_irqrestore(&acm->write_lock, flags); 711 return stat; 712 } 713 714 if (acm->susp_count) { 715 usb_anchor_urb(wb->urb, &acm->delayed); 716 spin_unlock_irqrestore(&acm->write_lock, flags); 717 return count; 718 } 719 720 stat = acm_start_wb(acm, wb); 721 spin_unlock_irqrestore(&acm->write_lock, flags); 722 723 if (stat < 0) 724 return stat; 725 return count; 726 } 727 728 static int acm_tty_write_room(struct tty_struct *tty) 729 { 730 struct acm *acm = tty->driver_data; 731 /* 732 * Do not let the line discipline to know that we have a reserve, 733 * or it might get too enthusiastic. 734 */ 735 return acm_wb_is_avail(acm) ? acm->writesize : 0; 736 } 737 738 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 739 { 740 struct acm *acm = tty->driver_data; 741 /* 742 * if the device was unplugged then any remaining characters fell out 743 * of the connector ;) 744 */ 745 if (acm->disconnected) 746 return 0; 747 /* 748 * This is inaccurate (overcounts), but it works. 749 */ 750 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 751 } 752 753 static void acm_tty_throttle(struct tty_struct *tty) 754 { 755 struct acm *acm = tty->driver_data; 756 757 spin_lock_irq(&acm->read_lock); 758 acm->throttle_req = 1; 759 spin_unlock_irq(&acm->read_lock); 760 } 761 762 static void acm_tty_unthrottle(struct tty_struct *tty) 763 { 764 struct acm *acm = tty->driver_data; 765 unsigned int was_throttled; 766 767 spin_lock_irq(&acm->read_lock); 768 was_throttled = acm->throttled; 769 acm->throttled = 0; 770 acm->throttle_req = 0; 771 spin_unlock_irq(&acm->read_lock); 772 773 if (was_throttled) 774 acm_submit_read_urbs(acm, GFP_KERNEL); 775 } 776 777 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 778 { 779 struct acm *acm = tty->driver_data; 780 int retval; 781 782 retval = acm_send_break(acm, state ? 0xffff : 0); 783 if (retval < 0) 784 dev_dbg(&acm->control->dev, "%s - send break failed\n", 785 __func__); 786 return retval; 787 } 788 789 static int acm_tty_tiocmget(struct tty_struct *tty) 790 { 791 struct acm *acm = tty->driver_data; 792 793 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 794 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 795 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 796 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 797 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 798 TIOCM_CTS; 799 } 800 801 static int acm_tty_tiocmset(struct tty_struct *tty, 802 unsigned int set, unsigned int clear) 803 { 804 struct acm *acm = tty->driver_data; 805 unsigned int newctrl; 806 807 newctrl = acm->ctrlout; 808 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 809 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 810 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 811 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 812 813 newctrl = (newctrl & ~clear) | set; 814 815 if (acm->ctrlout == newctrl) 816 return 0; 817 return acm_set_control(acm, acm->ctrlout = newctrl); 818 } 819 820 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 821 { 822 struct serial_struct tmp; 823 824 if (!info) 825 return -EINVAL; 826 827 memset(&tmp, 0, sizeof(tmp)); 828 tmp.flags = ASYNC_LOW_LATENCY; 829 tmp.xmit_fifo_size = acm->writesize; 830 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 831 tmp.close_delay = acm->port.close_delay / 10; 832 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 833 ASYNC_CLOSING_WAIT_NONE : 834 acm->port.closing_wait / 10; 835 836 if (copy_to_user(info, &tmp, sizeof(tmp))) 837 return -EFAULT; 838 else 839 return 0; 840 } 841 842 static int set_serial_info(struct acm *acm, 843 struct serial_struct __user *newinfo) 844 { 845 struct serial_struct new_serial; 846 unsigned int closing_wait, close_delay; 847 int retval = 0; 848 849 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 850 return -EFAULT; 851 852 close_delay = new_serial.close_delay * 10; 853 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 854 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 855 856 mutex_lock(&acm->port.mutex); 857 858 if (!capable(CAP_SYS_ADMIN)) { 859 if ((close_delay != acm->port.close_delay) || 860 (closing_wait != acm->port.closing_wait)) 861 retval = -EPERM; 862 else 863 retval = -EOPNOTSUPP; 864 } else { 865 acm->port.close_delay = close_delay; 866 acm->port.closing_wait = closing_wait; 867 } 868 869 mutex_unlock(&acm->port.mutex); 870 return retval; 871 } 872 873 static int wait_serial_change(struct acm *acm, unsigned long arg) 874 { 875 int rv = 0; 876 DECLARE_WAITQUEUE(wait, current); 877 struct async_icount old, new; 878 879 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD )) 880 return -EINVAL; 881 do { 882 spin_lock_irq(&acm->read_lock); 883 old = acm->oldcount; 884 new = acm->iocount; 885 acm->oldcount = new; 886 spin_unlock_irq(&acm->read_lock); 887 888 if ((arg & TIOCM_DSR) && 889 old.dsr != new.dsr) 890 break; 891 if ((arg & TIOCM_CD) && 892 old.dcd != new.dcd) 893 break; 894 if ((arg & TIOCM_RI) && 895 old.rng != new.rng) 896 break; 897 898 add_wait_queue(&acm->wioctl, &wait); 899 set_current_state(TASK_INTERRUPTIBLE); 900 schedule(); 901 remove_wait_queue(&acm->wioctl, &wait); 902 if (acm->disconnected) { 903 if (arg & TIOCM_CD) 904 break; 905 else 906 rv = -ENODEV; 907 } else { 908 if (signal_pending(current)) 909 rv = -ERESTARTSYS; 910 } 911 } while (!rv); 912 913 914 915 return rv; 916 } 917 918 static int get_serial_usage(struct acm *acm, 919 struct serial_icounter_struct __user *count) 920 { 921 struct serial_icounter_struct icount; 922 int rv = 0; 923 924 memset(&icount, 0, sizeof(icount)); 925 icount.dsr = acm->iocount.dsr; 926 icount.rng = acm->iocount.rng; 927 icount.dcd = acm->iocount.dcd; 928 icount.frame = acm->iocount.frame; 929 icount.overrun = acm->iocount.overrun; 930 icount.parity = acm->iocount.parity; 931 icount.brk = acm->iocount.brk; 932 933 if (copy_to_user(count, &icount, sizeof(icount)) > 0) 934 rv = -EFAULT; 935 936 return rv; 937 } 938 939 static int acm_tty_ioctl(struct tty_struct *tty, 940 unsigned int cmd, unsigned long arg) 941 { 942 struct acm *acm = tty->driver_data; 943 int rv = -ENOIOCTLCMD; 944 945 switch (cmd) { 946 case TIOCGSERIAL: /* gets serial port data */ 947 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 948 break; 949 case TIOCSSERIAL: 950 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 951 break; 952 case TIOCMIWAIT: 953 rv = usb_autopm_get_interface(acm->control); 954 if (rv < 0) { 955 rv = -EIO; 956 break; 957 } 958 rv = wait_serial_change(acm, arg); 959 usb_autopm_put_interface(acm->control); 960 break; 961 case TIOCGICOUNT: 962 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg); 963 break; 964 } 965 966 return rv; 967 } 968 969 static void acm_tty_set_termios(struct tty_struct *tty, 970 struct ktermios *termios_old) 971 { 972 struct acm *acm = tty->driver_data; 973 struct ktermios *termios = &tty->termios; 974 struct usb_cdc_line_coding newline; 975 int newctrl = acm->ctrlout; 976 977 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 978 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 979 newline.bParityType = termios->c_cflag & PARENB ? 980 (termios->c_cflag & PARODD ? 1 : 2) + 981 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 982 switch (termios->c_cflag & CSIZE) { 983 case CS5: 984 newline.bDataBits = 5; 985 break; 986 case CS6: 987 newline.bDataBits = 6; 988 break; 989 case CS7: 990 newline.bDataBits = 7; 991 break; 992 case CS8: 993 default: 994 newline.bDataBits = 8; 995 break; 996 } 997 /* FIXME: Needs to clear unsupported bits in the termios */ 998 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 999 1000 if (C_BAUD(tty) == B0) { 1001 newline.dwDTERate = acm->line.dwDTERate; 1002 newctrl &= ~ACM_CTRL_DTR; 1003 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1004 newctrl |= ACM_CTRL_DTR; 1005 } 1006 1007 if (newctrl != acm->ctrlout) 1008 acm_set_control(acm, acm->ctrlout = newctrl); 1009 1010 if (memcmp(&acm->line, &newline, sizeof newline)) { 1011 memcpy(&acm->line, &newline, sizeof newline); 1012 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1013 __func__, 1014 le32_to_cpu(newline.dwDTERate), 1015 newline.bCharFormat, newline.bParityType, 1016 newline.bDataBits); 1017 acm_set_line(acm, &acm->line); 1018 } 1019 } 1020 1021 static const struct tty_port_operations acm_port_ops = { 1022 .dtr_rts = acm_port_dtr_rts, 1023 .shutdown = acm_port_shutdown, 1024 .activate = acm_port_activate, 1025 .destruct = acm_port_destruct, 1026 }; 1027 1028 /* 1029 * USB probe and disconnect routines. 1030 */ 1031 1032 /* Little helpers: write/read buffers free */ 1033 static void acm_write_buffers_free(struct acm *acm) 1034 { 1035 int i; 1036 struct acm_wb *wb; 1037 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1038 1039 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1040 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); 1041 } 1042 1043 static void acm_read_buffers_free(struct acm *acm) 1044 { 1045 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1046 int i; 1047 1048 for (i = 0; i < acm->rx_buflimit; i++) 1049 usb_free_coherent(usb_dev, acm->readsize, 1050 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1051 } 1052 1053 /* Little helper: write buffers allocate */ 1054 static int acm_write_buffers_alloc(struct acm *acm) 1055 { 1056 int i; 1057 struct acm_wb *wb; 1058 1059 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1060 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1061 &wb->dmah); 1062 if (!wb->buf) { 1063 while (i != 0) { 1064 --i; 1065 --wb; 1066 usb_free_coherent(acm->dev, acm->writesize, 1067 wb->buf, wb->dmah); 1068 } 1069 return -ENOMEM; 1070 } 1071 } 1072 return 0; 1073 } 1074 1075 static int acm_probe(struct usb_interface *intf, 1076 const struct usb_device_id *id) 1077 { 1078 struct usb_cdc_union_desc *union_header = NULL; 1079 struct usb_cdc_country_functional_desc *cfd = NULL; 1080 unsigned char *buffer = intf->altsetting->extra; 1081 int buflen = intf->altsetting->extralen; 1082 struct usb_interface *control_interface; 1083 struct usb_interface *data_interface; 1084 struct usb_endpoint_descriptor *epctrl = NULL; 1085 struct usb_endpoint_descriptor *epread = NULL; 1086 struct usb_endpoint_descriptor *epwrite = NULL; 1087 struct usb_device *usb_dev = interface_to_usbdev(intf); 1088 struct acm *acm; 1089 int minor; 1090 int ctrlsize, readsize; 1091 u8 *buf; 1092 u8 ac_management_function = 0; 1093 u8 call_management_function = 0; 1094 int call_interface_num = -1; 1095 int data_interface_num = -1; 1096 unsigned long quirks; 1097 int num_rx_buf; 1098 int i; 1099 unsigned int elength = 0; 1100 int combined_interfaces = 0; 1101 struct device *tty_dev; 1102 int rv = -ENOMEM; 1103 1104 /* normal quirks */ 1105 quirks = (unsigned long)id->driver_info; 1106 1107 if (quirks == IGNORE_DEVICE) 1108 return -ENODEV; 1109 1110 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1111 1112 /* handle quirks deadly to normal probing*/ 1113 if (quirks == NO_UNION_NORMAL) { 1114 data_interface = usb_ifnum_to_if(usb_dev, 1); 1115 control_interface = usb_ifnum_to_if(usb_dev, 0); 1116 goto skip_normal_probe; 1117 } 1118 1119 /* normal probing*/ 1120 if (!buffer) { 1121 dev_err(&intf->dev, "Weird descriptor references\n"); 1122 return -EINVAL; 1123 } 1124 1125 if (!buflen) { 1126 if (intf->cur_altsetting->endpoint && 1127 intf->cur_altsetting->endpoint->extralen && 1128 intf->cur_altsetting->endpoint->extra) { 1129 dev_dbg(&intf->dev, 1130 "Seeking extra descriptors on endpoint\n"); 1131 buflen = intf->cur_altsetting->endpoint->extralen; 1132 buffer = intf->cur_altsetting->endpoint->extra; 1133 } else { 1134 dev_err(&intf->dev, 1135 "Zero length descriptor references\n"); 1136 return -EINVAL; 1137 } 1138 } 1139 1140 while (buflen > 0) { 1141 elength = buffer[0]; 1142 if (!elength) { 1143 dev_err(&intf->dev, "skipping garbage byte\n"); 1144 elength = 1; 1145 goto next_desc; 1146 } 1147 if (buffer[1] != USB_DT_CS_INTERFACE) { 1148 dev_err(&intf->dev, "skipping garbage\n"); 1149 goto next_desc; 1150 } 1151 1152 switch (buffer[2]) { 1153 case USB_CDC_UNION_TYPE: /* we've found it */ 1154 if (elength < sizeof(struct usb_cdc_union_desc)) 1155 goto next_desc; 1156 if (union_header) { 1157 dev_err(&intf->dev, "More than one " 1158 "union descriptor, skipping ...\n"); 1159 goto next_desc; 1160 } 1161 union_header = (struct usb_cdc_union_desc *)buffer; 1162 break; 1163 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ 1164 if (elength < sizeof(struct usb_cdc_country_functional_desc)) 1165 goto next_desc; 1166 cfd = (struct usb_cdc_country_functional_desc *)buffer; 1167 break; 1168 case USB_CDC_HEADER_TYPE: /* maybe check version */ 1169 break; /* for now we ignore it */ 1170 case USB_CDC_ACM_TYPE: 1171 if (elength < 4) 1172 goto next_desc; 1173 ac_management_function = buffer[3]; 1174 break; 1175 case USB_CDC_CALL_MANAGEMENT_TYPE: 1176 if (elength < 5) 1177 goto next_desc; 1178 call_management_function = buffer[3]; 1179 call_interface_num = buffer[4]; 1180 break; 1181 default: 1182 /* 1183 * there are LOTS more CDC descriptors that 1184 * could legitimately be found here. 1185 */ 1186 dev_dbg(&intf->dev, "Ignoring descriptor: " 1187 "type %02x, length %ud\n", 1188 buffer[2], elength); 1189 break; 1190 } 1191 next_desc: 1192 buflen -= elength; 1193 buffer += elength; 1194 } 1195 1196 if (!union_header) { 1197 if (call_interface_num > 0) { 1198 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1199 /* quirks for Droids MuIn LCD */ 1200 if (quirks & NO_DATA_INTERFACE) 1201 data_interface = usb_ifnum_to_if(usb_dev, 0); 1202 else 1203 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); 1204 control_interface = intf; 1205 } else { 1206 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1207 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1208 return -ENODEV; 1209 } else { 1210 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1211 combined_interfaces = 1; 1212 control_interface = data_interface = intf; 1213 goto look_for_collapsed_interface; 1214 } 1215 } 1216 } else { 1217 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1218 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); 1219 } 1220 1221 if (!control_interface || !data_interface) { 1222 dev_dbg(&intf->dev, "no interfaces\n"); 1223 return -ENODEV; 1224 } 1225 1226 if (data_interface_num != call_interface_num) 1227 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1228 1229 if (control_interface == data_interface) { 1230 /* some broken devices designed for windows work this way */ 1231 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1232 combined_interfaces = 1; 1233 /* a popular other OS doesn't use it */ 1234 quirks |= NO_CAP_LINE; 1235 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1236 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1237 return -EINVAL; 1238 } 1239 look_for_collapsed_interface: 1240 for (i = 0; i < 3; i++) { 1241 struct usb_endpoint_descriptor *ep; 1242 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1243 1244 if (usb_endpoint_is_int_in(ep)) 1245 epctrl = ep; 1246 else if (usb_endpoint_is_bulk_out(ep)) 1247 epwrite = ep; 1248 else if (usb_endpoint_is_bulk_in(ep)) 1249 epread = ep; 1250 else 1251 return -EINVAL; 1252 } 1253 if (!epctrl || !epread || !epwrite) 1254 return -ENODEV; 1255 else 1256 goto made_compressed_probe; 1257 } 1258 1259 skip_normal_probe: 1260 1261 /*workaround for switched interfaces */ 1262 if (data_interface->cur_altsetting->desc.bInterfaceClass 1263 != CDC_DATA_INTERFACE_TYPE) { 1264 if (control_interface->cur_altsetting->desc.bInterfaceClass 1265 == CDC_DATA_INTERFACE_TYPE) { 1266 dev_dbg(&intf->dev, 1267 "Your device has switched interfaces.\n"); 1268 swap(control_interface, data_interface); 1269 } else { 1270 return -EINVAL; 1271 } 1272 } 1273 1274 /* Accept probe requests only for the control interface */ 1275 if (!combined_interfaces && intf != control_interface) 1276 return -ENODEV; 1277 1278 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1279 /* valid in this context */ 1280 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1281 return -EBUSY; 1282 } 1283 1284 1285 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1286 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1287 return -EINVAL; 1288 1289 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1290 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1291 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1292 1293 1294 /* workaround for switched endpoints */ 1295 if (!usb_endpoint_dir_in(epread)) { 1296 /* descriptors are swapped */ 1297 dev_dbg(&intf->dev, 1298 "The data interface has switched endpoints\n"); 1299 swap(epread, epwrite); 1300 } 1301 made_compressed_probe: 1302 dev_dbg(&intf->dev, "interfaces are valid\n"); 1303 1304 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1305 if (acm == NULL) 1306 goto alloc_fail; 1307 1308 minor = acm_alloc_minor(acm); 1309 if (minor < 0) { 1310 dev_err(&intf->dev, "no more free acm devices\n"); 1311 kfree(acm); 1312 return -ENODEV; 1313 } 1314 1315 ctrlsize = usb_endpoint_maxp(epctrl); 1316 readsize = usb_endpoint_maxp(epread) * 1317 (quirks == SINGLE_RX_URB ? 1 : 2); 1318 acm->combined_interfaces = combined_interfaces; 1319 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1320 acm->control = control_interface; 1321 acm->data = data_interface; 1322 acm->minor = minor; 1323 acm->dev = usb_dev; 1324 acm->ctrl_caps = ac_management_function; 1325 if (quirks & NO_CAP_LINE) 1326 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1327 acm->ctrlsize = ctrlsize; 1328 acm->readsize = readsize; 1329 acm->rx_buflimit = num_rx_buf; 1330 INIT_WORK(&acm->work, acm_softint); 1331 init_waitqueue_head(&acm->wioctl); 1332 spin_lock_init(&acm->write_lock); 1333 spin_lock_init(&acm->read_lock); 1334 mutex_init(&acm->mutex); 1335 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1336 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1337 if (acm->is_int_ep) 1338 acm->bInterval = epread->bInterval; 1339 tty_port_init(&acm->port); 1340 acm->port.ops = &acm_port_ops; 1341 init_usb_anchor(&acm->delayed); 1342 acm->quirks = quirks; 1343 1344 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1345 if (!buf) 1346 goto alloc_fail2; 1347 acm->ctrl_buffer = buf; 1348 1349 if (acm_write_buffers_alloc(acm) < 0) 1350 goto alloc_fail4; 1351 1352 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1353 if (!acm->ctrlurb) 1354 goto alloc_fail5; 1355 1356 for (i = 0; i < num_rx_buf; i++) { 1357 struct acm_rb *rb = &(acm->read_buffers[i]); 1358 struct urb *urb; 1359 1360 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1361 &rb->dma); 1362 if (!rb->base) 1363 goto alloc_fail6; 1364 rb->index = i; 1365 rb->instance = acm; 1366 1367 urb = usb_alloc_urb(0, GFP_KERNEL); 1368 if (!urb) 1369 goto alloc_fail6; 1370 1371 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1372 urb->transfer_dma = rb->dma; 1373 if (acm->is_int_ep) { 1374 usb_fill_int_urb(urb, acm->dev, 1375 acm->rx_endpoint, 1376 rb->base, 1377 acm->readsize, 1378 acm_read_bulk_callback, rb, 1379 acm->bInterval); 1380 } else { 1381 usb_fill_bulk_urb(urb, acm->dev, 1382 acm->rx_endpoint, 1383 rb->base, 1384 acm->readsize, 1385 acm_read_bulk_callback, rb); 1386 } 1387 1388 acm->read_urbs[i] = urb; 1389 __set_bit(i, &acm->read_urbs_free); 1390 } 1391 for (i = 0; i < ACM_NW; i++) { 1392 struct acm_wb *snd = &(acm->wb[i]); 1393 1394 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1395 if (snd->urb == NULL) 1396 goto alloc_fail7; 1397 1398 if (usb_endpoint_xfer_int(epwrite)) 1399 usb_fill_int_urb(snd->urb, usb_dev, 1400 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), 1401 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1402 else 1403 usb_fill_bulk_urb(snd->urb, usb_dev, 1404 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), 1405 NULL, acm->writesize, acm_write_bulk, snd); 1406 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1407 snd->instance = acm; 1408 } 1409 1410 usb_set_intfdata(intf, acm); 1411 1412 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1413 if (i < 0) 1414 goto alloc_fail7; 1415 1416 if (cfd) { /* export the country data */ 1417 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1418 if (!acm->country_codes) 1419 goto skip_countries; 1420 acm->country_code_size = cfd->bLength - 4; 1421 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1422 cfd->bLength - 4); 1423 acm->country_rel_date = cfd->iCountryCodeRelDate; 1424 1425 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1426 if (i < 0) { 1427 kfree(acm->country_codes); 1428 acm->country_codes = NULL; 1429 acm->country_code_size = 0; 1430 goto skip_countries; 1431 } 1432 1433 i = device_create_file(&intf->dev, 1434 &dev_attr_iCountryCodeRelDate); 1435 if (i < 0) { 1436 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1437 kfree(acm->country_codes); 1438 acm->country_codes = NULL; 1439 acm->country_code_size = 0; 1440 goto skip_countries; 1441 } 1442 } 1443 1444 skip_countries: 1445 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1446 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1447 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1448 /* works around buggy devices */ 1449 epctrl->bInterval ? epctrl->bInterval : 16); 1450 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1451 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1452 1453 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1454 1455 acm->line.dwDTERate = cpu_to_le32(9600); 1456 acm->line.bDataBits = 8; 1457 acm_set_line(acm, &acm->line); 1458 1459 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1460 usb_set_intfdata(data_interface, acm); 1461 1462 usb_get_intf(control_interface); 1463 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1464 &control_interface->dev); 1465 if (IS_ERR(tty_dev)) { 1466 rv = PTR_ERR(tty_dev); 1467 goto alloc_fail8; 1468 } 1469 1470 if (quirks & CLEAR_HALT_CONDITIONS) { 1471 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress)); 1472 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress)); 1473 } 1474 1475 return 0; 1476 alloc_fail8: 1477 if (acm->country_codes) { 1478 device_remove_file(&acm->control->dev, 1479 &dev_attr_wCountryCodes); 1480 device_remove_file(&acm->control->dev, 1481 &dev_attr_iCountryCodeRelDate); 1482 kfree(acm->country_codes); 1483 } 1484 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1485 alloc_fail7: 1486 usb_set_intfdata(intf, NULL); 1487 for (i = 0; i < ACM_NW; i++) 1488 usb_free_urb(acm->wb[i].urb); 1489 alloc_fail6: 1490 for (i = 0; i < num_rx_buf; i++) 1491 usb_free_urb(acm->read_urbs[i]); 1492 acm_read_buffers_free(acm); 1493 usb_free_urb(acm->ctrlurb); 1494 alloc_fail5: 1495 acm_write_buffers_free(acm); 1496 alloc_fail4: 1497 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1498 alloc_fail2: 1499 acm_release_minor(acm); 1500 kfree(acm); 1501 alloc_fail: 1502 return rv; 1503 } 1504 1505 static void stop_data_traffic(struct acm *acm) 1506 { 1507 int i; 1508 1509 dev_dbg(&acm->control->dev, "%s\n", __func__); 1510 1511 usb_kill_urb(acm->ctrlurb); 1512 for (i = 0; i < ACM_NW; i++) 1513 usb_kill_urb(acm->wb[i].urb); 1514 for (i = 0; i < acm->rx_buflimit; i++) 1515 usb_kill_urb(acm->read_urbs[i]); 1516 1517 cancel_work_sync(&acm->work); 1518 } 1519 1520 static void acm_disconnect(struct usb_interface *intf) 1521 { 1522 struct acm *acm = usb_get_intfdata(intf); 1523 struct usb_device *usb_dev = interface_to_usbdev(intf); 1524 struct tty_struct *tty; 1525 int i; 1526 1527 dev_dbg(&intf->dev, "%s\n", __func__); 1528 1529 /* sibling interface is already cleaning up */ 1530 if (!acm) 1531 return; 1532 1533 mutex_lock(&acm->mutex); 1534 acm->disconnected = true; 1535 if (acm->country_codes) { 1536 device_remove_file(&acm->control->dev, 1537 &dev_attr_wCountryCodes); 1538 device_remove_file(&acm->control->dev, 1539 &dev_attr_iCountryCodeRelDate); 1540 } 1541 wake_up_all(&acm->wioctl); 1542 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1543 usb_set_intfdata(acm->control, NULL); 1544 usb_set_intfdata(acm->data, NULL); 1545 mutex_unlock(&acm->mutex); 1546 1547 tty = tty_port_tty_get(&acm->port); 1548 if (tty) { 1549 tty_vhangup(tty); 1550 tty_kref_put(tty); 1551 } 1552 1553 stop_data_traffic(acm); 1554 1555 tty_unregister_device(acm_tty_driver, acm->minor); 1556 1557 usb_free_urb(acm->ctrlurb); 1558 for (i = 0; i < ACM_NW; i++) 1559 usb_free_urb(acm->wb[i].urb); 1560 for (i = 0; i < acm->rx_buflimit; i++) 1561 usb_free_urb(acm->read_urbs[i]); 1562 acm_write_buffers_free(acm); 1563 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1564 acm_read_buffers_free(acm); 1565 1566 if (!acm->combined_interfaces) 1567 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1568 acm->data : acm->control); 1569 1570 tty_port_put(&acm->port); 1571 } 1572 1573 #ifdef CONFIG_PM 1574 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1575 { 1576 struct acm *acm = usb_get_intfdata(intf); 1577 int cnt; 1578 1579 spin_lock_irq(&acm->write_lock); 1580 if (PMSG_IS_AUTO(message)) { 1581 if (acm->transmitting) { 1582 spin_unlock_irq(&acm->write_lock); 1583 return -EBUSY; 1584 } 1585 } 1586 cnt = acm->susp_count++; 1587 spin_unlock_irq(&acm->write_lock); 1588 1589 if (cnt) 1590 return 0; 1591 1592 stop_data_traffic(acm); 1593 1594 return 0; 1595 } 1596 1597 static int acm_resume(struct usb_interface *intf) 1598 { 1599 struct acm *acm = usb_get_intfdata(intf); 1600 struct urb *urb; 1601 int rv = 0; 1602 1603 spin_lock_irq(&acm->write_lock); 1604 1605 if (--acm->susp_count) 1606 goto out; 1607 1608 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { 1609 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1610 1611 for (;;) { 1612 urb = usb_get_from_anchor(&acm->delayed); 1613 if (!urb) 1614 break; 1615 1616 acm_start_wb(acm, urb->context); 1617 } 1618 1619 /* 1620 * delayed error checking because we must 1621 * do the write path at all cost 1622 */ 1623 if (rv < 0) 1624 goto out; 1625 1626 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1627 } 1628 out: 1629 spin_unlock_irq(&acm->write_lock); 1630 1631 return rv; 1632 } 1633 1634 static int acm_reset_resume(struct usb_interface *intf) 1635 { 1636 struct acm *acm = usb_get_intfdata(intf); 1637 1638 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) 1639 tty_port_tty_hangup(&acm->port, false); 1640 1641 return acm_resume(intf); 1642 } 1643 1644 #endif /* CONFIG_PM */ 1645 1646 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1647 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1648 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1649 USB_CDC_ACM_PROTO_VENDOR) 1650 1651 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1652 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1653 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1654 USB_CDC_ACM_PROTO_VENDOR) 1655 1656 /* 1657 * USB driver structure. 1658 */ 1659 1660 static const struct usb_device_id acm_ids[] = { 1661 /* quirky and broken devices */ 1662 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1663 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1664 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1665 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1666 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1667 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1668 }, 1669 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1670 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1671 }, 1672 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1673 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1674 }, 1675 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1676 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1677 }, 1678 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1679 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1680 }, 1681 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1682 .driver_info = SINGLE_RX_URB, 1683 }, 1684 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1685 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1686 }, 1687 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1688 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1689 }, 1690 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1691 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1692 }, 1693 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1694 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1695 }, 1696 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1697 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1698 }, 1699 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1700 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1701 }, 1702 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1703 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1704 }, 1705 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1706 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1707 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1708 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1709 }, 1710 /* Motorola H24 HSPA module: */ 1711 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1712 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1713 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1714 }, 1715 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1716 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1717 }, 1718 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1719 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1720 }, 1721 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1722 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1723 }, 1724 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1725 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1726 }, 1727 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1728 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1729 }, 1730 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1731 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1732 }, 1733 1734 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1735 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1736 data interface instead of 1737 communications interface. 1738 Maybe we should define a new 1739 quirk for this. */ 1740 }, 1741 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1742 .driver_info = NO_UNION_NORMAL, 1743 }, 1744 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1745 .driver_info = NO_UNION_NORMAL, 1746 }, 1747 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1748 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1749 }, 1750 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1751 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1752 }, 1753 1754 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1755 .driver_info = CLEAR_HALT_CONDITIONS, 1756 }, 1757 1758 /* Nokia S60 phones expose two ACM channels. The first is 1759 * a modem and is picked up by the standard AT-command 1760 * information below. The second is 'vendor-specific' but 1761 * is treated as a serial device at the S60 end, so we want 1762 * to expose it on Linux too. */ 1763 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1764 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1765 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1766 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1767 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1768 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1769 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1770 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1771 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1772 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1773 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1774 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1775 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1776 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1777 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1778 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1779 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1780 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1781 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1782 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1783 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1784 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1785 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1786 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1787 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1788 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1789 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1790 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1791 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1792 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1793 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1794 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1795 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1796 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1797 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1798 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1799 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1800 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1801 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1802 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1803 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1804 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1805 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1806 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1807 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1808 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1809 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1810 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1811 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1812 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1813 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1814 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1815 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1816 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1817 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1818 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1820 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1821 1822 /* Support for Owen devices */ 1823 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1824 1825 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1826 1827 /* Support for Droids MuIn LCD */ 1828 { USB_DEVICE(0x04d8, 0x000b), 1829 .driver_info = NO_DATA_INTERFACE, 1830 }, 1831 1832 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1833 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1834 .driver_info = IGNORE_DEVICE, 1835 }, 1836 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1837 .driver_info = IGNORE_DEVICE, 1838 }, 1839 #endif 1840 1841 /* control interfaces without any protocol set */ 1842 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1843 USB_CDC_PROTO_NONE) }, 1844 1845 /* control interfaces with various AT-command sets */ 1846 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1847 USB_CDC_ACM_PROTO_AT_V25TER) }, 1848 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1849 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1850 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1851 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1852 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1853 USB_CDC_ACM_PROTO_AT_GSM) }, 1854 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1855 USB_CDC_ACM_PROTO_AT_3G) }, 1856 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1857 USB_CDC_ACM_PROTO_AT_CDMA) }, 1858 1859 { } 1860 }; 1861 1862 MODULE_DEVICE_TABLE(usb, acm_ids); 1863 1864 static struct usb_driver acm_driver = { 1865 .name = "cdc_acm", 1866 .probe = acm_probe, 1867 .disconnect = acm_disconnect, 1868 #ifdef CONFIG_PM 1869 .suspend = acm_suspend, 1870 .resume = acm_resume, 1871 .reset_resume = acm_reset_resume, 1872 #endif 1873 .id_table = acm_ids, 1874 #ifdef CONFIG_PM 1875 .supports_autosuspend = 1, 1876 #endif 1877 .disable_hub_initiated_lpm = 1, 1878 }; 1879 1880 /* 1881 * TTY driver structures. 1882 */ 1883 1884 static const struct tty_operations acm_ops = { 1885 .install = acm_tty_install, 1886 .open = acm_tty_open, 1887 .close = acm_tty_close, 1888 .cleanup = acm_tty_cleanup, 1889 .hangup = acm_tty_hangup, 1890 .write = acm_tty_write, 1891 .write_room = acm_tty_write_room, 1892 .ioctl = acm_tty_ioctl, 1893 .throttle = acm_tty_throttle, 1894 .unthrottle = acm_tty_unthrottle, 1895 .chars_in_buffer = acm_tty_chars_in_buffer, 1896 .break_ctl = acm_tty_break_ctl, 1897 .set_termios = acm_tty_set_termios, 1898 .tiocmget = acm_tty_tiocmget, 1899 .tiocmset = acm_tty_tiocmset, 1900 }; 1901 1902 /* 1903 * Init / exit. 1904 */ 1905 1906 static int __init acm_init(void) 1907 { 1908 int retval; 1909 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1910 if (!acm_tty_driver) 1911 return -ENOMEM; 1912 acm_tty_driver->driver_name = "acm", 1913 acm_tty_driver->name = "ttyACM", 1914 acm_tty_driver->major = ACM_TTY_MAJOR, 1915 acm_tty_driver->minor_start = 0, 1916 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1917 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1918 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1919 acm_tty_driver->init_termios = tty_std_termios; 1920 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1921 HUPCL | CLOCAL; 1922 tty_set_operations(acm_tty_driver, &acm_ops); 1923 1924 retval = tty_register_driver(acm_tty_driver); 1925 if (retval) { 1926 put_tty_driver(acm_tty_driver); 1927 return retval; 1928 } 1929 1930 retval = usb_register(&acm_driver); 1931 if (retval) { 1932 tty_unregister_driver(acm_tty_driver); 1933 put_tty_driver(acm_tty_driver); 1934 return retval; 1935 } 1936 1937 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1938 1939 return 0; 1940 } 1941 1942 static void __exit acm_exit(void) 1943 { 1944 usb_deregister(&acm_driver); 1945 tty_unregister_driver(acm_tty_driver); 1946 put_tty_driver(acm_tty_driver); 1947 idr_destroy(&acm_minors); 1948 } 1949 1950 module_init(acm_init); 1951 module_exit(acm_exit); 1952 1953 MODULE_AUTHOR(DRIVER_AUTHOR); 1954 MODULE_DESCRIPTION(DRIVER_DESC); 1955 MODULE_LICENSE("GPL"); 1956 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 1957