1 /* 2 * cdc-acm.c 3 * 4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 11 * 12 * USB Abstract Control Model driver for USB modems and ISDN adapters 13 * 14 * Sponsored by SuSE 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 */ 30 31 #undef DEBUG 32 #undef VERBOSE_DEBUG 33 34 #include <linux/kernel.h> 35 #include <linux/errno.h> 36 #include <linux/init.h> 37 #include <linux/slab.h> 38 #include <linux/tty.h> 39 #include <linux/serial.h> 40 #include <linux/tty_driver.h> 41 #include <linux/tty_flip.h> 42 #include <linux/module.h> 43 #include <linux/mutex.h> 44 #include <linux/uaccess.h> 45 #include <linux/usb.h> 46 #include <linux/usb/cdc.h> 47 #include <asm/byteorder.h> 48 #include <asm/unaligned.h> 49 #include <linux/list.h> 50 51 #include "cdc-acm.h" 52 53 54 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 55 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 56 57 static struct usb_driver acm_driver; 58 static struct tty_driver *acm_tty_driver; 59 static struct acm *acm_table[ACM_TTY_MINORS]; 60 61 static DEFINE_MUTEX(acm_table_lock); 62 63 static void acm_tty_set_termios(struct tty_struct *tty, 64 struct ktermios *termios_old); 65 66 /* 67 * acm_table accessors 68 */ 69 70 /* 71 * Look up an ACM structure by index. If found and not disconnected, increment 72 * its refcount and return it with its mutex held. 73 */ 74 static struct acm *acm_get_by_index(unsigned index) 75 { 76 struct acm *acm; 77 78 mutex_lock(&acm_table_lock); 79 acm = acm_table[index]; 80 if (acm) { 81 mutex_lock(&acm->mutex); 82 if (acm->disconnected) { 83 mutex_unlock(&acm->mutex); 84 acm = NULL; 85 } else { 86 tty_port_get(&acm->port); 87 mutex_unlock(&acm->mutex); 88 } 89 } 90 mutex_unlock(&acm_table_lock); 91 return acm; 92 } 93 94 /* 95 * Try to find an available minor number and if found, associate it with 'acm'. 96 */ 97 static int acm_alloc_minor(struct acm *acm) 98 { 99 int minor; 100 101 mutex_lock(&acm_table_lock); 102 for (minor = 0; minor < ACM_TTY_MINORS; minor++) { 103 if (!acm_table[minor]) { 104 acm_table[minor] = acm; 105 break; 106 } 107 } 108 mutex_unlock(&acm_table_lock); 109 110 return minor; 111 } 112 113 /* Release the minor number associated with 'acm'. */ 114 static void acm_release_minor(struct acm *acm) 115 { 116 mutex_lock(&acm_table_lock); 117 acm_table[acm->minor] = NULL; 118 mutex_unlock(&acm_table_lock); 119 } 120 121 /* 122 * Functions for ACM control messages. 123 */ 124 125 static int acm_ctrl_msg(struct acm *acm, int request, int value, 126 void *buf, int len) 127 { 128 int retval; 129 130 retval = usb_autopm_get_interface(acm->control); 131 if (retval) 132 return retval; 133 134 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 135 request, USB_RT_ACM, value, 136 acm->control->altsetting[0].desc.bInterfaceNumber, 137 buf, len, 5000); 138 139 dev_dbg(&acm->control->dev, 140 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 141 __func__, request, value, len, retval); 142 143 usb_autopm_put_interface(acm->control); 144 145 return retval < 0 ? retval : 0; 146 } 147 148 /* devices aren't required to support these requests. 149 * the cdc acm descriptor tells whether they do... 150 */ 151 static inline int acm_set_control(struct acm *acm, int control) 152 { 153 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 154 return -EOPNOTSUPP; 155 156 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 157 control, NULL, 0); 158 } 159 160 #define acm_set_line(acm, line) \ 161 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 162 #define acm_send_break(acm, ms) \ 163 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 164 165 /* 166 * Write buffer management. 167 * All of these assume proper locks taken by the caller. 168 */ 169 170 static int acm_wb_alloc(struct acm *acm) 171 { 172 int i, wbn; 173 struct acm_wb *wb; 174 175 wbn = 0; 176 i = 0; 177 for (;;) { 178 wb = &acm->wb[wbn]; 179 if (!wb->use) { 180 wb->use = 1; 181 return wbn; 182 } 183 wbn = (wbn + 1) % ACM_NW; 184 if (++i >= ACM_NW) 185 return -1; 186 } 187 } 188 189 static int acm_wb_is_avail(struct acm *acm) 190 { 191 int i, n; 192 unsigned long flags; 193 194 n = ACM_NW; 195 spin_lock_irqsave(&acm->write_lock, flags); 196 for (i = 0; i < ACM_NW; i++) 197 n -= acm->wb[i].use; 198 spin_unlock_irqrestore(&acm->write_lock, flags); 199 return n; 200 } 201 202 /* 203 * Finish write. Caller must hold acm->write_lock 204 */ 205 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 206 { 207 wb->use = 0; 208 acm->transmitting--; 209 usb_autopm_put_interface_async(acm->control); 210 } 211 212 /* 213 * Poke write. 214 * 215 * the caller is responsible for locking 216 */ 217 218 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 219 { 220 int rc; 221 222 acm->transmitting++; 223 224 wb->urb->transfer_buffer = wb->buf; 225 wb->urb->transfer_dma = wb->dmah; 226 wb->urb->transfer_buffer_length = wb->len; 227 wb->urb->dev = acm->dev; 228 229 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 230 if (rc < 0) { 231 dev_err(&acm->data->dev, 232 "%s - usb_submit_urb(write bulk) failed: %d\n", 233 __func__, rc); 234 acm_write_done(acm, wb); 235 } 236 return rc; 237 } 238 239 /* 240 * attributes exported through sysfs 241 */ 242 static ssize_t show_caps 243 (struct device *dev, struct device_attribute *attr, char *buf) 244 { 245 struct usb_interface *intf = to_usb_interface(dev); 246 struct acm *acm = usb_get_intfdata(intf); 247 248 return sprintf(buf, "%d", acm->ctrl_caps); 249 } 250 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); 251 252 static ssize_t show_country_codes 253 (struct device *dev, struct device_attribute *attr, char *buf) 254 { 255 struct usb_interface *intf = to_usb_interface(dev); 256 struct acm *acm = usb_get_intfdata(intf); 257 258 memcpy(buf, acm->country_codes, acm->country_code_size); 259 return acm->country_code_size; 260 } 261 262 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); 263 264 static ssize_t show_country_rel_date 265 (struct device *dev, struct device_attribute *attr, char *buf) 266 { 267 struct usb_interface *intf = to_usb_interface(dev); 268 struct acm *acm = usb_get_intfdata(intf); 269 270 return sprintf(buf, "%d", acm->country_rel_date); 271 } 272 273 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); 274 /* 275 * Interrupt handlers for various ACM device responses 276 */ 277 278 /* control interface reports status changes with "interrupt" transfers */ 279 static void acm_ctrl_irq(struct urb *urb) 280 { 281 struct acm *acm = urb->context; 282 struct usb_cdc_notification *dr = urb->transfer_buffer; 283 unsigned char *data; 284 int newctrl; 285 int difference; 286 int retval; 287 int status = urb->status; 288 289 switch (status) { 290 case 0: 291 /* success */ 292 break; 293 case -ECONNRESET: 294 case -ENOENT: 295 case -ESHUTDOWN: 296 /* this urb is terminated, clean up */ 297 dev_dbg(&acm->control->dev, 298 "%s - urb shutting down with status: %d\n", 299 __func__, status); 300 return; 301 default: 302 dev_dbg(&acm->control->dev, 303 "%s - nonzero urb status received: %d\n", 304 __func__, status); 305 goto exit; 306 } 307 308 usb_mark_last_busy(acm->dev); 309 310 data = (unsigned char *)(dr + 1); 311 switch (dr->bNotificationType) { 312 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 313 dev_dbg(&acm->control->dev, "%s - network connection: %d\n", 314 __func__, dr->wValue); 315 break; 316 317 case USB_CDC_NOTIFY_SERIAL_STATE: 318 newctrl = get_unaligned_le16(data); 319 320 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 321 dev_dbg(&acm->control->dev, "%s - calling hangup\n", 322 __func__); 323 tty_port_tty_hangup(&acm->port, false); 324 } 325 326 difference = acm->ctrlin ^ newctrl; 327 spin_lock(&acm->read_lock); 328 acm->ctrlin = newctrl; 329 acm->oldcount = acm->iocount; 330 331 if (difference & ACM_CTRL_DSR) 332 acm->iocount.dsr++; 333 if (difference & ACM_CTRL_BRK) 334 acm->iocount.brk++; 335 if (difference & ACM_CTRL_RI) 336 acm->iocount.rng++; 337 if (difference & ACM_CTRL_DCD) 338 acm->iocount.dcd++; 339 if (difference & ACM_CTRL_FRAMING) 340 acm->iocount.frame++; 341 if (difference & ACM_CTRL_PARITY) 342 acm->iocount.parity++; 343 if (difference & ACM_CTRL_OVERRUN) 344 acm->iocount.overrun++; 345 spin_unlock(&acm->read_lock); 346 347 if (difference) 348 wake_up_all(&acm->wioctl); 349 350 break; 351 352 default: 353 dev_dbg(&acm->control->dev, 354 "%s - unknown notification %d received: index %d " 355 "len %d data0 %d data1 %d\n", 356 __func__, 357 dr->bNotificationType, dr->wIndex, 358 dr->wLength, data[0], data[1]); 359 break; 360 } 361 exit: 362 retval = usb_submit_urb(urb, GFP_ATOMIC); 363 if (retval && retval != -EPERM) 364 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", 365 __func__, retval); 366 } 367 368 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 369 { 370 int res; 371 372 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 373 return 0; 374 375 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index); 376 377 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 378 if (res) { 379 if (res != -EPERM) { 380 dev_err(&acm->data->dev, 381 "%s - usb_submit_urb failed: %d\n", 382 __func__, res); 383 } 384 set_bit(index, &acm->read_urbs_free); 385 return res; 386 } 387 388 return 0; 389 } 390 391 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 392 { 393 int res; 394 int i; 395 396 for (i = 0; i < acm->rx_buflimit; ++i) { 397 res = acm_submit_read_urb(acm, i, mem_flags); 398 if (res) 399 return res; 400 } 401 402 return 0; 403 } 404 405 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 406 { 407 if (!urb->actual_length) 408 return; 409 410 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 411 urb->actual_length); 412 tty_flip_buffer_push(&acm->port); 413 } 414 415 static void acm_read_bulk_callback(struct urb *urb) 416 { 417 struct acm_rb *rb = urb->context; 418 struct acm *acm = rb->instance; 419 unsigned long flags; 420 int status = urb->status; 421 422 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__, 423 rb->index, urb->actual_length); 424 425 if (!acm->dev) { 426 set_bit(rb->index, &acm->read_urbs_free); 427 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 428 return; 429 } 430 431 if (status) { 432 set_bit(rb->index, &acm->read_urbs_free); 433 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n", 434 __func__, status); 435 return; 436 } 437 438 usb_mark_last_busy(acm->dev); 439 440 acm_process_read_urb(acm, urb); 441 /* 442 * Unthrottle may run on another CPU which needs to see events 443 * in the same order. Submission has an implict barrier 444 */ 445 smp_mb__before_atomic(); 446 set_bit(rb->index, &acm->read_urbs_free); 447 448 /* throttle device if requested by tty */ 449 spin_lock_irqsave(&acm->read_lock, flags); 450 acm->throttled = acm->throttle_req; 451 if (!acm->throttled) { 452 spin_unlock_irqrestore(&acm->read_lock, flags); 453 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 454 } else { 455 spin_unlock_irqrestore(&acm->read_lock, flags); 456 } 457 } 458 459 /* data interface wrote those outgoing bytes */ 460 static void acm_write_bulk(struct urb *urb) 461 { 462 struct acm_wb *wb = urb->context; 463 struct acm *acm = wb->instance; 464 unsigned long flags; 465 int status = urb->status; 466 467 if (status || (urb->actual_length != urb->transfer_buffer_length)) 468 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n", 469 __func__, 470 urb->actual_length, 471 urb->transfer_buffer_length, 472 status); 473 474 spin_lock_irqsave(&acm->write_lock, flags); 475 acm_write_done(acm, wb); 476 spin_unlock_irqrestore(&acm->write_lock, flags); 477 schedule_work(&acm->work); 478 } 479 480 static void acm_softint(struct work_struct *work) 481 { 482 struct acm *acm = container_of(work, struct acm, work); 483 484 dev_vdbg(&acm->data->dev, "%s\n", __func__); 485 486 tty_port_tty_wakeup(&acm->port); 487 } 488 489 /* 490 * TTY handlers 491 */ 492 493 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 494 { 495 struct acm *acm; 496 int retval; 497 498 dev_dbg(tty->dev, "%s\n", __func__); 499 500 acm = acm_get_by_index(tty->index); 501 if (!acm) 502 return -ENODEV; 503 504 retval = tty_standard_install(driver, tty); 505 if (retval) 506 goto error_init_termios; 507 508 tty->driver_data = acm; 509 510 return 0; 511 512 error_init_termios: 513 tty_port_put(&acm->port); 514 return retval; 515 } 516 517 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 518 { 519 struct acm *acm = tty->driver_data; 520 521 dev_dbg(tty->dev, "%s\n", __func__); 522 523 return tty_port_open(&acm->port, tty, filp); 524 } 525 526 static void acm_port_dtr_rts(struct tty_port *port, int raise) 527 { 528 struct acm *acm = container_of(port, struct acm, port); 529 int val; 530 int res; 531 532 if (raise) 533 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 534 else 535 val = 0; 536 537 /* FIXME: add missing ctrlout locking throughout driver */ 538 acm->ctrlout = val; 539 540 res = acm_set_control(acm, val); 541 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 542 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 543 } 544 545 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 546 { 547 struct acm *acm = container_of(port, struct acm, port); 548 int retval = -ENODEV; 549 int i; 550 551 dev_dbg(&acm->control->dev, "%s\n", __func__); 552 553 mutex_lock(&acm->mutex); 554 if (acm->disconnected) 555 goto disconnected; 556 557 retval = usb_autopm_get_interface(acm->control); 558 if (retval) 559 goto error_get_interface; 560 561 /* 562 * FIXME: Why do we need this? Allocating 64K of physically contiguous 563 * memory is really nasty... 564 */ 565 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 566 acm->control->needs_remote_wakeup = 1; 567 568 acm->ctrlurb->dev = acm->dev; 569 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 570 if (retval) { 571 dev_err(&acm->control->dev, 572 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 573 goto error_submit_urb; 574 } 575 576 acm_tty_set_termios(tty, NULL); 577 578 /* 579 * Unthrottle device in case the TTY was closed while throttled. 580 */ 581 spin_lock_irq(&acm->read_lock); 582 acm->throttled = 0; 583 acm->throttle_req = 0; 584 spin_unlock_irq(&acm->read_lock); 585 586 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 587 if (retval) 588 goto error_submit_read_urbs; 589 590 usb_autopm_put_interface(acm->control); 591 592 mutex_unlock(&acm->mutex); 593 594 return 0; 595 596 error_submit_read_urbs: 597 for (i = 0; i < acm->rx_buflimit; i++) 598 usb_kill_urb(acm->read_urbs[i]); 599 usb_kill_urb(acm->ctrlurb); 600 error_submit_urb: 601 usb_autopm_put_interface(acm->control); 602 error_get_interface: 603 disconnected: 604 mutex_unlock(&acm->mutex); 605 606 return usb_translate_errors(retval); 607 } 608 609 static void acm_port_destruct(struct tty_port *port) 610 { 611 struct acm *acm = container_of(port, struct acm, port); 612 613 dev_dbg(&acm->control->dev, "%s\n", __func__); 614 615 acm_release_minor(acm); 616 usb_put_intf(acm->control); 617 kfree(acm->country_codes); 618 kfree(acm); 619 } 620 621 static void acm_port_shutdown(struct tty_port *port) 622 { 623 struct acm *acm = container_of(port, struct acm, port); 624 struct urb *urb; 625 struct acm_wb *wb; 626 int i; 627 628 dev_dbg(&acm->control->dev, "%s\n", __func__); 629 630 /* 631 * Need to grab write_lock to prevent race with resume, but no need to 632 * hold it due to the tty-port initialised flag. 633 */ 634 spin_lock_irq(&acm->write_lock); 635 spin_unlock_irq(&acm->write_lock); 636 637 usb_autopm_get_interface_no_resume(acm->control); 638 acm->control->needs_remote_wakeup = 0; 639 usb_autopm_put_interface(acm->control); 640 641 for (;;) { 642 urb = usb_get_from_anchor(&acm->delayed); 643 if (!urb) 644 break; 645 wb = urb->context; 646 wb->use = 0; 647 usb_autopm_put_interface_async(acm->control); 648 } 649 650 usb_kill_urb(acm->ctrlurb); 651 for (i = 0; i < ACM_NW; i++) 652 usb_kill_urb(acm->wb[i].urb); 653 for (i = 0; i < acm->rx_buflimit; i++) 654 usb_kill_urb(acm->read_urbs[i]); 655 } 656 657 static void acm_tty_cleanup(struct tty_struct *tty) 658 { 659 struct acm *acm = tty->driver_data; 660 dev_dbg(&acm->control->dev, "%s\n", __func__); 661 tty_port_put(&acm->port); 662 } 663 664 static void acm_tty_hangup(struct tty_struct *tty) 665 { 666 struct acm *acm = tty->driver_data; 667 dev_dbg(&acm->control->dev, "%s\n", __func__); 668 tty_port_hangup(&acm->port); 669 } 670 671 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 672 { 673 struct acm *acm = tty->driver_data; 674 dev_dbg(&acm->control->dev, "%s\n", __func__); 675 tty_port_close(&acm->port, tty, filp); 676 } 677 678 static int acm_tty_write(struct tty_struct *tty, 679 const unsigned char *buf, int count) 680 { 681 struct acm *acm = tty->driver_data; 682 int stat; 683 unsigned long flags; 684 int wbn; 685 struct acm_wb *wb; 686 687 if (!count) 688 return 0; 689 690 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count); 691 692 spin_lock_irqsave(&acm->write_lock, flags); 693 wbn = acm_wb_alloc(acm); 694 if (wbn < 0) { 695 spin_unlock_irqrestore(&acm->write_lock, flags); 696 return 0; 697 } 698 wb = &acm->wb[wbn]; 699 700 if (!acm->dev) { 701 wb->use = 0; 702 spin_unlock_irqrestore(&acm->write_lock, flags); 703 return -ENODEV; 704 } 705 706 count = (count > acm->writesize) ? acm->writesize : count; 707 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count); 708 memcpy(wb->buf, buf, count); 709 wb->len = count; 710 711 stat = usb_autopm_get_interface_async(acm->control); 712 if (stat) { 713 wb->use = 0; 714 spin_unlock_irqrestore(&acm->write_lock, flags); 715 return stat; 716 } 717 718 if (acm->susp_count) { 719 usb_anchor_urb(wb->urb, &acm->delayed); 720 spin_unlock_irqrestore(&acm->write_lock, flags); 721 return count; 722 } 723 724 stat = acm_start_wb(acm, wb); 725 spin_unlock_irqrestore(&acm->write_lock, flags); 726 727 if (stat < 0) 728 return stat; 729 return count; 730 } 731 732 static int acm_tty_write_room(struct tty_struct *tty) 733 { 734 struct acm *acm = tty->driver_data; 735 /* 736 * Do not let the line discipline to know that we have a reserve, 737 * or it might get too enthusiastic. 738 */ 739 return acm_wb_is_avail(acm) ? acm->writesize : 0; 740 } 741 742 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 743 { 744 struct acm *acm = tty->driver_data; 745 /* 746 * if the device was unplugged then any remaining characters fell out 747 * of the connector ;) 748 */ 749 if (acm->disconnected) 750 return 0; 751 /* 752 * This is inaccurate (overcounts), but it works. 753 */ 754 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 755 } 756 757 static void acm_tty_throttle(struct tty_struct *tty) 758 { 759 struct acm *acm = tty->driver_data; 760 761 spin_lock_irq(&acm->read_lock); 762 acm->throttle_req = 1; 763 spin_unlock_irq(&acm->read_lock); 764 } 765 766 static void acm_tty_unthrottle(struct tty_struct *tty) 767 { 768 struct acm *acm = tty->driver_data; 769 unsigned int was_throttled; 770 771 spin_lock_irq(&acm->read_lock); 772 was_throttled = acm->throttled; 773 acm->throttled = 0; 774 acm->throttle_req = 0; 775 spin_unlock_irq(&acm->read_lock); 776 777 if (was_throttled) 778 acm_submit_read_urbs(acm, GFP_KERNEL); 779 } 780 781 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 782 { 783 struct acm *acm = tty->driver_data; 784 int retval; 785 786 retval = acm_send_break(acm, state ? 0xffff : 0); 787 if (retval < 0) 788 dev_dbg(&acm->control->dev, "%s - send break failed\n", 789 __func__); 790 return retval; 791 } 792 793 static int acm_tty_tiocmget(struct tty_struct *tty) 794 { 795 struct acm *acm = tty->driver_data; 796 797 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 798 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 799 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 800 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 801 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 802 TIOCM_CTS; 803 } 804 805 static int acm_tty_tiocmset(struct tty_struct *tty, 806 unsigned int set, unsigned int clear) 807 { 808 struct acm *acm = tty->driver_data; 809 unsigned int newctrl; 810 811 newctrl = acm->ctrlout; 812 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 813 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 814 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 815 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 816 817 newctrl = (newctrl & ~clear) | set; 818 819 if (acm->ctrlout == newctrl) 820 return 0; 821 return acm_set_control(acm, acm->ctrlout = newctrl); 822 } 823 824 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 825 { 826 struct serial_struct tmp; 827 828 if (!info) 829 return -EINVAL; 830 831 memset(&tmp, 0, sizeof(tmp)); 832 tmp.flags = ASYNC_LOW_LATENCY; 833 tmp.xmit_fifo_size = acm->writesize; 834 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 835 tmp.close_delay = acm->port.close_delay / 10; 836 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 837 ASYNC_CLOSING_WAIT_NONE : 838 acm->port.closing_wait / 10; 839 840 if (copy_to_user(info, &tmp, sizeof(tmp))) 841 return -EFAULT; 842 else 843 return 0; 844 } 845 846 static int set_serial_info(struct acm *acm, 847 struct serial_struct __user *newinfo) 848 { 849 struct serial_struct new_serial; 850 unsigned int closing_wait, close_delay; 851 int retval = 0; 852 853 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 854 return -EFAULT; 855 856 close_delay = new_serial.close_delay * 10; 857 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 858 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 859 860 mutex_lock(&acm->port.mutex); 861 862 if (!capable(CAP_SYS_ADMIN)) { 863 if ((close_delay != acm->port.close_delay) || 864 (closing_wait != acm->port.closing_wait)) 865 retval = -EPERM; 866 else 867 retval = -EOPNOTSUPP; 868 } else { 869 acm->port.close_delay = close_delay; 870 acm->port.closing_wait = closing_wait; 871 } 872 873 mutex_unlock(&acm->port.mutex); 874 return retval; 875 } 876 877 static int wait_serial_change(struct acm *acm, unsigned long arg) 878 { 879 int rv = 0; 880 DECLARE_WAITQUEUE(wait, current); 881 struct async_icount old, new; 882 883 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD )) 884 return -EINVAL; 885 do { 886 spin_lock_irq(&acm->read_lock); 887 old = acm->oldcount; 888 new = acm->iocount; 889 acm->oldcount = new; 890 spin_unlock_irq(&acm->read_lock); 891 892 if ((arg & TIOCM_DSR) && 893 old.dsr != new.dsr) 894 break; 895 if ((arg & TIOCM_CD) && 896 old.dcd != new.dcd) 897 break; 898 if ((arg & TIOCM_RI) && 899 old.rng != new.rng) 900 break; 901 902 add_wait_queue(&acm->wioctl, &wait); 903 set_current_state(TASK_INTERRUPTIBLE); 904 schedule(); 905 remove_wait_queue(&acm->wioctl, &wait); 906 if (acm->disconnected) { 907 if (arg & TIOCM_CD) 908 break; 909 else 910 rv = -ENODEV; 911 } else { 912 if (signal_pending(current)) 913 rv = -ERESTARTSYS; 914 } 915 } while (!rv); 916 917 918 919 return rv; 920 } 921 922 static int get_serial_usage(struct acm *acm, 923 struct serial_icounter_struct __user *count) 924 { 925 struct serial_icounter_struct icount; 926 int rv = 0; 927 928 memset(&icount, 0, sizeof(icount)); 929 icount.dsr = acm->iocount.dsr; 930 icount.rng = acm->iocount.rng; 931 icount.dcd = acm->iocount.dcd; 932 icount.frame = acm->iocount.frame; 933 icount.overrun = acm->iocount.overrun; 934 icount.parity = acm->iocount.parity; 935 icount.brk = acm->iocount.brk; 936 937 if (copy_to_user(count, &icount, sizeof(icount)) > 0) 938 rv = -EFAULT; 939 940 return rv; 941 } 942 943 static int acm_tty_ioctl(struct tty_struct *tty, 944 unsigned int cmd, unsigned long arg) 945 { 946 struct acm *acm = tty->driver_data; 947 int rv = -ENOIOCTLCMD; 948 949 switch (cmd) { 950 case TIOCGSERIAL: /* gets serial port data */ 951 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 952 break; 953 case TIOCSSERIAL: 954 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 955 break; 956 case TIOCMIWAIT: 957 rv = usb_autopm_get_interface(acm->control); 958 if (rv < 0) { 959 rv = -EIO; 960 break; 961 } 962 rv = wait_serial_change(acm, arg); 963 usb_autopm_put_interface(acm->control); 964 break; 965 case TIOCGICOUNT: 966 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg); 967 break; 968 } 969 970 return rv; 971 } 972 973 static void acm_tty_set_termios(struct tty_struct *tty, 974 struct ktermios *termios_old) 975 { 976 struct acm *acm = tty->driver_data; 977 struct ktermios *termios = &tty->termios; 978 struct usb_cdc_line_coding newline; 979 int newctrl = acm->ctrlout; 980 981 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 982 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 983 newline.bParityType = termios->c_cflag & PARENB ? 984 (termios->c_cflag & PARODD ? 1 : 2) + 985 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 986 switch (termios->c_cflag & CSIZE) { 987 case CS5: 988 newline.bDataBits = 5; 989 break; 990 case CS6: 991 newline.bDataBits = 6; 992 break; 993 case CS7: 994 newline.bDataBits = 7; 995 break; 996 case CS8: 997 default: 998 newline.bDataBits = 8; 999 break; 1000 } 1001 /* FIXME: Needs to clear unsupported bits in the termios */ 1002 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1003 1004 if (C_BAUD(tty) == B0) { 1005 newline.dwDTERate = acm->line.dwDTERate; 1006 newctrl &= ~ACM_CTRL_DTR; 1007 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1008 newctrl |= ACM_CTRL_DTR; 1009 } 1010 1011 if (newctrl != acm->ctrlout) 1012 acm_set_control(acm, acm->ctrlout = newctrl); 1013 1014 if (memcmp(&acm->line, &newline, sizeof newline)) { 1015 memcpy(&acm->line, &newline, sizeof newline); 1016 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1017 __func__, 1018 le32_to_cpu(newline.dwDTERate), 1019 newline.bCharFormat, newline.bParityType, 1020 newline.bDataBits); 1021 acm_set_line(acm, &acm->line); 1022 } 1023 } 1024 1025 static const struct tty_port_operations acm_port_ops = { 1026 .dtr_rts = acm_port_dtr_rts, 1027 .shutdown = acm_port_shutdown, 1028 .activate = acm_port_activate, 1029 .destruct = acm_port_destruct, 1030 }; 1031 1032 /* 1033 * USB probe and disconnect routines. 1034 */ 1035 1036 /* Little helpers: write/read buffers free */ 1037 static void acm_write_buffers_free(struct acm *acm) 1038 { 1039 int i; 1040 struct acm_wb *wb; 1041 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1042 1043 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1044 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); 1045 } 1046 1047 static void acm_read_buffers_free(struct acm *acm) 1048 { 1049 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1050 int i; 1051 1052 for (i = 0; i < acm->rx_buflimit; i++) 1053 usb_free_coherent(usb_dev, acm->readsize, 1054 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1055 } 1056 1057 /* Little helper: write buffers allocate */ 1058 static int acm_write_buffers_alloc(struct acm *acm) 1059 { 1060 int i; 1061 struct acm_wb *wb; 1062 1063 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1064 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1065 &wb->dmah); 1066 if (!wb->buf) { 1067 while (i != 0) { 1068 --i; 1069 --wb; 1070 usb_free_coherent(acm->dev, acm->writesize, 1071 wb->buf, wb->dmah); 1072 } 1073 return -ENOMEM; 1074 } 1075 } 1076 return 0; 1077 } 1078 1079 static int acm_probe(struct usb_interface *intf, 1080 const struct usb_device_id *id) 1081 { 1082 struct usb_cdc_union_desc *union_header = NULL; 1083 struct usb_cdc_country_functional_desc *cfd = NULL; 1084 unsigned char *buffer = intf->altsetting->extra; 1085 int buflen = intf->altsetting->extralen; 1086 struct usb_interface *control_interface; 1087 struct usb_interface *data_interface; 1088 struct usb_endpoint_descriptor *epctrl = NULL; 1089 struct usb_endpoint_descriptor *epread = NULL; 1090 struct usb_endpoint_descriptor *epwrite = NULL; 1091 struct usb_device *usb_dev = interface_to_usbdev(intf); 1092 struct acm *acm; 1093 int minor; 1094 int ctrlsize, readsize; 1095 u8 *buf; 1096 u8 ac_management_function = 0; 1097 u8 call_management_function = 0; 1098 int call_interface_num = -1; 1099 int data_interface_num = -1; 1100 unsigned long quirks; 1101 int num_rx_buf; 1102 int i; 1103 unsigned int elength = 0; 1104 int combined_interfaces = 0; 1105 struct device *tty_dev; 1106 int rv = -ENOMEM; 1107 1108 /* normal quirks */ 1109 quirks = (unsigned long)id->driver_info; 1110 1111 if (quirks == IGNORE_DEVICE) 1112 return -ENODEV; 1113 1114 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1115 1116 /* handle quirks deadly to normal probing*/ 1117 if (quirks == NO_UNION_NORMAL) { 1118 data_interface = usb_ifnum_to_if(usb_dev, 1); 1119 control_interface = usb_ifnum_to_if(usb_dev, 0); 1120 goto skip_normal_probe; 1121 } 1122 1123 /* normal probing*/ 1124 if (!buffer) { 1125 dev_err(&intf->dev, "Weird descriptor references\n"); 1126 return -EINVAL; 1127 } 1128 1129 if (!buflen) { 1130 if (intf->cur_altsetting->endpoint && 1131 intf->cur_altsetting->endpoint->extralen && 1132 intf->cur_altsetting->endpoint->extra) { 1133 dev_dbg(&intf->dev, 1134 "Seeking extra descriptors on endpoint\n"); 1135 buflen = intf->cur_altsetting->endpoint->extralen; 1136 buffer = intf->cur_altsetting->endpoint->extra; 1137 } else { 1138 dev_err(&intf->dev, 1139 "Zero length descriptor references\n"); 1140 return -EINVAL; 1141 } 1142 } 1143 1144 while (buflen > 0) { 1145 elength = buffer[0]; 1146 if (!elength) { 1147 dev_err(&intf->dev, "skipping garbage byte\n"); 1148 elength = 1; 1149 goto next_desc; 1150 } 1151 if (buffer[1] != USB_DT_CS_INTERFACE) { 1152 dev_err(&intf->dev, "skipping garbage\n"); 1153 goto next_desc; 1154 } 1155 1156 switch (buffer[2]) { 1157 case USB_CDC_UNION_TYPE: /* we've found it */ 1158 if (elength < sizeof(struct usb_cdc_union_desc)) 1159 goto next_desc; 1160 if (union_header) { 1161 dev_err(&intf->dev, "More than one " 1162 "union descriptor, skipping ...\n"); 1163 goto next_desc; 1164 } 1165 union_header = (struct usb_cdc_union_desc *)buffer; 1166 break; 1167 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ 1168 if (elength < sizeof(struct usb_cdc_country_functional_desc)) 1169 goto next_desc; 1170 cfd = (struct usb_cdc_country_functional_desc *)buffer; 1171 break; 1172 case USB_CDC_HEADER_TYPE: /* maybe check version */ 1173 break; /* for now we ignore it */ 1174 case USB_CDC_ACM_TYPE: 1175 if (elength < 4) 1176 goto next_desc; 1177 ac_management_function = buffer[3]; 1178 break; 1179 case USB_CDC_CALL_MANAGEMENT_TYPE: 1180 if (elength < 5) 1181 goto next_desc; 1182 call_management_function = buffer[3]; 1183 call_interface_num = buffer[4]; 1184 break; 1185 default: 1186 /* 1187 * there are LOTS more CDC descriptors that 1188 * could legitimately be found here. 1189 */ 1190 dev_dbg(&intf->dev, "Ignoring descriptor: " 1191 "type %02x, length %ud\n", 1192 buffer[2], elength); 1193 break; 1194 } 1195 next_desc: 1196 buflen -= elength; 1197 buffer += elength; 1198 } 1199 1200 if (!union_header) { 1201 if (call_interface_num > 0) { 1202 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1203 /* quirks for Droids MuIn LCD */ 1204 if (quirks & NO_DATA_INTERFACE) 1205 data_interface = usb_ifnum_to_if(usb_dev, 0); 1206 else 1207 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); 1208 control_interface = intf; 1209 } else { 1210 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1211 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1212 return -ENODEV; 1213 } else { 1214 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1215 combined_interfaces = 1; 1216 control_interface = data_interface = intf; 1217 goto look_for_collapsed_interface; 1218 } 1219 } 1220 } else { 1221 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1222 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); 1223 } 1224 1225 if (!control_interface || !data_interface) { 1226 dev_dbg(&intf->dev, "no interfaces\n"); 1227 return -ENODEV; 1228 } 1229 1230 if (data_interface_num != call_interface_num) 1231 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1232 1233 if (control_interface == data_interface) { 1234 /* some broken devices designed for windows work this way */ 1235 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1236 combined_interfaces = 1; 1237 /* a popular other OS doesn't use it */ 1238 quirks |= NO_CAP_LINE; 1239 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1240 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1241 return -EINVAL; 1242 } 1243 look_for_collapsed_interface: 1244 for (i = 0; i < 3; i++) { 1245 struct usb_endpoint_descriptor *ep; 1246 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1247 1248 if (usb_endpoint_is_int_in(ep)) 1249 epctrl = ep; 1250 else if (usb_endpoint_is_bulk_out(ep)) 1251 epwrite = ep; 1252 else if (usb_endpoint_is_bulk_in(ep)) 1253 epread = ep; 1254 else 1255 return -EINVAL; 1256 } 1257 if (!epctrl || !epread || !epwrite) 1258 return -ENODEV; 1259 else 1260 goto made_compressed_probe; 1261 } 1262 1263 skip_normal_probe: 1264 1265 /*workaround for switched interfaces */ 1266 if (data_interface->cur_altsetting->desc.bInterfaceClass 1267 != CDC_DATA_INTERFACE_TYPE) { 1268 if (control_interface->cur_altsetting->desc.bInterfaceClass 1269 == CDC_DATA_INTERFACE_TYPE) { 1270 struct usb_interface *t; 1271 dev_dbg(&intf->dev, 1272 "Your device has switched interfaces.\n"); 1273 t = control_interface; 1274 control_interface = data_interface; 1275 data_interface = t; 1276 } else { 1277 return -EINVAL; 1278 } 1279 } 1280 1281 /* Accept probe requests only for the control interface */ 1282 if (!combined_interfaces && intf != control_interface) 1283 return -ENODEV; 1284 1285 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1286 /* valid in this context */ 1287 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1288 return -EBUSY; 1289 } 1290 1291 1292 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1293 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1294 return -EINVAL; 1295 1296 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1297 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1298 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1299 1300 1301 /* workaround for switched endpoints */ 1302 if (!usb_endpoint_dir_in(epread)) { 1303 /* descriptors are swapped */ 1304 struct usb_endpoint_descriptor *t; 1305 dev_dbg(&intf->dev, 1306 "The data interface has switched endpoints\n"); 1307 t = epread; 1308 epread = epwrite; 1309 epwrite = t; 1310 } 1311 made_compressed_probe: 1312 dev_dbg(&intf->dev, "interfaces are valid\n"); 1313 1314 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1315 if (acm == NULL) 1316 goto alloc_fail; 1317 1318 minor = acm_alloc_minor(acm); 1319 if (minor == ACM_TTY_MINORS) { 1320 dev_err(&intf->dev, "no more free acm devices\n"); 1321 kfree(acm); 1322 return -ENODEV; 1323 } 1324 1325 ctrlsize = usb_endpoint_maxp(epctrl); 1326 readsize = usb_endpoint_maxp(epread) * 1327 (quirks == SINGLE_RX_URB ? 1 : 2); 1328 acm->combined_interfaces = combined_interfaces; 1329 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1330 acm->control = control_interface; 1331 acm->data = data_interface; 1332 acm->minor = minor; 1333 acm->dev = usb_dev; 1334 acm->ctrl_caps = ac_management_function; 1335 if (quirks & NO_CAP_LINE) 1336 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1337 acm->ctrlsize = ctrlsize; 1338 acm->readsize = readsize; 1339 acm->rx_buflimit = num_rx_buf; 1340 INIT_WORK(&acm->work, acm_softint); 1341 init_waitqueue_head(&acm->wioctl); 1342 spin_lock_init(&acm->write_lock); 1343 spin_lock_init(&acm->read_lock); 1344 mutex_init(&acm->mutex); 1345 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1346 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1347 if (acm->is_int_ep) 1348 acm->bInterval = epread->bInterval; 1349 tty_port_init(&acm->port); 1350 acm->port.ops = &acm_port_ops; 1351 init_usb_anchor(&acm->delayed); 1352 acm->quirks = quirks; 1353 1354 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1355 if (!buf) 1356 goto alloc_fail2; 1357 acm->ctrl_buffer = buf; 1358 1359 if (acm_write_buffers_alloc(acm) < 0) 1360 goto alloc_fail4; 1361 1362 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1363 if (!acm->ctrlurb) 1364 goto alloc_fail5; 1365 1366 for (i = 0; i < num_rx_buf; i++) { 1367 struct acm_rb *rb = &(acm->read_buffers[i]); 1368 struct urb *urb; 1369 1370 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1371 &rb->dma); 1372 if (!rb->base) 1373 goto alloc_fail6; 1374 rb->index = i; 1375 rb->instance = acm; 1376 1377 urb = usb_alloc_urb(0, GFP_KERNEL); 1378 if (!urb) 1379 goto alloc_fail6; 1380 1381 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1382 urb->transfer_dma = rb->dma; 1383 if (acm->is_int_ep) { 1384 usb_fill_int_urb(urb, acm->dev, 1385 acm->rx_endpoint, 1386 rb->base, 1387 acm->readsize, 1388 acm_read_bulk_callback, rb, 1389 acm->bInterval); 1390 } else { 1391 usb_fill_bulk_urb(urb, acm->dev, 1392 acm->rx_endpoint, 1393 rb->base, 1394 acm->readsize, 1395 acm_read_bulk_callback, rb); 1396 } 1397 1398 acm->read_urbs[i] = urb; 1399 __set_bit(i, &acm->read_urbs_free); 1400 } 1401 for (i = 0; i < ACM_NW; i++) { 1402 struct acm_wb *snd = &(acm->wb[i]); 1403 1404 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1405 if (snd->urb == NULL) 1406 goto alloc_fail7; 1407 1408 if (usb_endpoint_xfer_int(epwrite)) 1409 usb_fill_int_urb(snd->urb, usb_dev, 1410 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), 1411 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1412 else 1413 usb_fill_bulk_urb(snd->urb, usb_dev, 1414 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), 1415 NULL, acm->writesize, acm_write_bulk, snd); 1416 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1417 snd->instance = acm; 1418 } 1419 1420 usb_set_intfdata(intf, acm); 1421 1422 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1423 if (i < 0) 1424 goto alloc_fail7; 1425 1426 if (cfd) { /* export the country data */ 1427 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1428 if (!acm->country_codes) 1429 goto skip_countries; 1430 acm->country_code_size = cfd->bLength - 4; 1431 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1432 cfd->bLength - 4); 1433 acm->country_rel_date = cfd->iCountryCodeRelDate; 1434 1435 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1436 if (i < 0) { 1437 kfree(acm->country_codes); 1438 acm->country_codes = NULL; 1439 acm->country_code_size = 0; 1440 goto skip_countries; 1441 } 1442 1443 i = device_create_file(&intf->dev, 1444 &dev_attr_iCountryCodeRelDate); 1445 if (i < 0) { 1446 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1447 kfree(acm->country_codes); 1448 acm->country_codes = NULL; 1449 acm->country_code_size = 0; 1450 goto skip_countries; 1451 } 1452 } 1453 1454 skip_countries: 1455 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1456 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1457 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1458 /* works around buggy devices */ 1459 epctrl->bInterval ? epctrl->bInterval : 16); 1460 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1461 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1462 1463 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1464 1465 acm->line.dwDTERate = cpu_to_le32(9600); 1466 acm->line.bDataBits = 8; 1467 acm_set_line(acm, &acm->line); 1468 1469 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1470 usb_set_intfdata(data_interface, acm); 1471 1472 usb_get_intf(control_interface); 1473 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1474 &control_interface->dev); 1475 if (IS_ERR(tty_dev)) { 1476 rv = PTR_ERR(tty_dev); 1477 goto alloc_fail8; 1478 } 1479 1480 return 0; 1481 alloc_fail8: 1482 if (acm->country_codes) { 1483 device_remove_file(&acm->control->dev, 1484 &dev_attr_wCountryCodes); 1485 device_remove_file(&acm->control->dev, 1486 &dev_attr_iCountryCodeRelDate); 1487 kfree(acm->country_codes); 1488 } 1489 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1490 alloc_fail7: 1491 usb_set_intfdata(intf, NULL); 1492 for (i = 0; i < ACM_NW; i++) 1493 usb_free_urb(acm->wb[i].urb); 1494 alloc_fail6: 1495 for (i = 0; i < num_rx_buf; i++) 1496 usb_free_urb(acm->read_urbs[i]); 1497 acm_read_buffers_free(acm); 1498 usb_free_urb(acm->ctrlurb); 1499 alloc_fail5: 1500 acm_write_buffers_free(acm); 1501 alloc_fail4: 1502 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1503 alloc_fail2: 1504 acm_release_minor(acm); 1505 kfree(acm); 1506 alloc_fail: 1507 return rv; 1508 } 1509 1510 static void stop_data_traffic(struct acm *acm) 1511 { 1512 int i; 1513 1514 dev_dbg(&acm->control->dev, "%s\n", __func__); 1515 1516 usb_kill_urb(acm->ctrlurb); 1517 for (i = 0; i < ACM_NW; i++) 1518 usb_kill_urb(acm->wb[i].urb); 1519 for (i = 0; i < acm->rx_buflimit; i++) 1520 usb_kill_urb(acm->read_urbs[i]); 1521 1522 cancel_work_sync(&acm->work); 1523 } 1524 1525 static void acm_disconnect(struct usb_interface *intf) 1526 { 1527 struct acm *acm = usb_get_intfdata(intf); 1528 struct usb_device *usb_dev = interface_to_usbdev(intf); 1529 struct tty_struct *tty; 1530 int i; 1531 1532 dev_dbg(&intf->dev, "%s\n", __func__); 1533 1534 /* sibling interface is already cleaning up */ 1535 if (!acm) 1536 return; 1537 1538 mutex_lock(&acm->mutex); 1539 acm->disconnected = true; 1540 if (acm->country_codes) { 1541 device_remove_file(&acm->control->dev, 1542 &dev_attr_wCountryCodes); 1543 device_remove_file(&acm->control->dev, 1544 &dev_attr_iCountryCodeRelDate); 1545 } 1546 wake_up_all(&acm->wioctl); 1547 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1548 usb_set_intfdata(acm->control, NULL); 1549 usb_set_intfdata(acm->data, NULL); 1550 mutex_unlock(&acm->mutex); 1551 1552 tty = tty_port_tty_get(&acm->port); 1553 if (tty) { 1554 tty_vhangup(tty); 1555 tty_kref_put(tty); 1556 } 1557 1558 stop_data_traffic(acm); 1559 1560 tty_unregister_device(acm_tty_driver, acm->minor); 1561 1562 usb_free_urb(acm->ctrlurb); 1563 for (i = 0; i < ACM_NW; i++) 1564 usb_free_urb(acm->wb[i].urb); 1565 for (i = 0; i < acm->rx_buflimit; i++) 1566 usb_free_urb(acm->read_urbs[i]); 1567 acm_write_buffers_free(acm); 1568 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1569 acm_read_buffers_free(acm); 1570 1571 if (!acm->combined_interfaces) 1572 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1573 acm->data : acm->control); 1574 1575 tty_port_put(&acm->port); 1576 } 1577 1578 #ifdef CONFIG_PM 1579 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1580 { 1581 struct acm *acm = usb_get_intfdata(intf); 1582 int cnt; 1583 1584 spin_lock_irq(&acm->write_lock); 1585 if (PMSG_IS_AUTO(message)) { 1586 if (acm->transmitting) { 1587 spin_unlock_irq(&acm->write_lock); 1588 return -EBUSY; 1589 } 1590 } 1591 cnt = acm->susp_count++; 1592 spin_unlock_irq(&acm->write_lock); 1593 1594 if (cnt) 1595 return 0; 1596 1597 stop_data_traffic(acm); 1598 1599 return 0; 1600 } 1601 1602 static int acm_resume(struct usb_interface *intf) 1603 { 1604 struct acm *acm = usb_get_intfdata(intf); 1605 struct urb *urb; 1606 int rv = 0; 1607 1608 spin_lock_irq(&acm->write_lock); 1609 1610 if (--acm->susp_count) 1611 goto out; 1612 1613 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { 1614 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1615 1616 for (;;) { 1617 urb = usb_get_from_anchor(&acm->delayed); 1618 if (!urb) 1619 break; 1620 1621 acm_start_wb(acm, urb->context); 1622 } 1623 1624 /* 1625 * delayed error checking because we must 1626 * do the write path at all cost 1627 */ 1628 if (rv < 0) 1629 goto out; 1630 1631 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1632 } 1633 out: 1634 spin_unlock_irq(&acm->write_lock); 1635 1636 return rv; 1637 } 1638 1639 static int acm_reset_resume(struct usb_interface *intf) 1640 { 1641 struct acm *acm = usb_get_intfdata(intf); 1642 1643 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) 1644 tty_port_tty_hangup(&acm->port, false); 1645 1646 return acm_resume(intf); 1647 } 1648 1649 #endif /* CONFIG_PM */ 1650 1651 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1652 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1653 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1654 USB_CDC_ACM_PROTO_VENDOR) 1655 1656 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1657 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1658 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1659 USB_CDC_ACM_PROTO_VENDOR) 1660 1661 /* 1662 * USB driver structure. 1663 */ 1664 1665 static const struct usb_device_id acm_ids[] = { 1666 /* quirky and broken devices */ 1667 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1668 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1669 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1670 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1671 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1672 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1673 }, 1674 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1675 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1676 }, 1677 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1678 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1679 }, 1680 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1681 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1682 }, 1683 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1684 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1685 }, 1686 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1687 .driver_info = SINGLE_RX_URB, 1688 }, 1689 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1690 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1691 }, 1692 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1693 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1694 }, 1695 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1696 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1697 }, 1698 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1699 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1700 }, 1701 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1702 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1703 }, 1704 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1705 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1706 }, 1707 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1708 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1709 }, 1710 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1711 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1712 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1713 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1714 }, 1715 /* Motorola H24 HSPA module: */ 1716 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1717 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1718 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1719 }, 1720 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1721 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1722 }, 1723 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1724 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1725 }, 1726 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1727 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1728 }, 1729 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1730 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1731 }, 1732 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1733 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1734 }, 1735 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1736 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1737 }, 1738 1739 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1740 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1741 data interface instead of 1742 communications interface. 1743 Maybe we should define a new 1744 quirk for this. */ 1745 }, 1746 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1747 .driver_info = NO_UNION_NORMAL, 1748 }, 1749 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1750 .driver_info = NO_UNION_NORMAL, 1751 }, 1752 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1753 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1754 }, 1755 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1756 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1757 }, 1758 1759 /* Nokia S60 phones expose two ACM channels. The first is 1760 * a modem and is picked up by the standard AT-command 1761 * information below. The second is 'vendor-specific' but 1762 * is treated as a serial device at the S60 end, so we want 1763 * to expose it on Linux too. */ 1764 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1765 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1766 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1767 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1768 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1769 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1770 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1771 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1772 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1773 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1774 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1775 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1776 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1777 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1778 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1779 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1780 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1781 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1782 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1783 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1784 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1785 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1786 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1787 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1788 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1789 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1790 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1791 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1792 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1793 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1794 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1795 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1796 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1797 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1798 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1799 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1800 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1801 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1802 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1803 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1804 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1805 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1806 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1807 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1808 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1809 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1810 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1811 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1812 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1813 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1814 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1815 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1816 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1817 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1818 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1820 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1821 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1822 1823 /* Support for Owen devices */ 1824 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1825 1826 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1827 1828 /* Support for Droids MuIn LCD */ 1829 { USB_DEVICE(0x04d8, 0x000b), 1830 .driver_info = NO_DATA_INTERFACE, 1831 }, 1832 1833 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1834 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1835 .driver_info = IGNORE_DEVICE, 1836 }, 1837 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1838 .driver_info = IGNORE_DEVICE, 1839 }, 1840 #endif 1841 1842 /* control interfaces without any protocol set */ 1843 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1844 USB_CDC_PROTO_NONE) }, 1845 1846 /* control interfaces with various AT-command sets */ 1847 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1848 USB_CDC_ACM_PROTO_AT_V25TER) }, 1849 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1850 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1851 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1852 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1853 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1854 USB_CDC_ACM_PROTO_AT_GSM) }, 1855 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1856 USB_CDC_ACM_PROTO_AT_3G) }, 1857 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1858 USB_CDC_ACM_PROTO_AT_CDMA) }, 1859 1860 { } 1861 }; 1862 1863 MODULE_DEVICE_TABLE(usb, acm_ids); 1864 1865 static struct usb_driver acm_driver = { 1866 .name = "cdc_acm", 1867 .probe = acm_probe, 1868 .disconnect = acm_disconnect, 1869 #ifdef CONFIG_PM 1870 .suspend = acm_suspend, 1871 .resume = acm_resume, 1872 .reset_resume = acm_reset_resume, 1873 #endif 1874 .id_table = acm_ids, 1875 #ifdef CONFIG_PM 1876 .supports_autosuspend = 1, 1877 #endif 1878 .disable_hub_initiated_lpm = 1, 1879 }; 1880 1881 /* 1882 * TTY driver structures. 1883 */ 1884 1885 static const struct tty_operations acm_ops = { 1886 .install = acm_tty_install, 1887 .open = acm_tty_open, 1888 .close = acm_tty_close, 1889 .cleanup = acm_tty_cleanup, 1890 .hangup = acm_tty_hangup, 1891 .write = acm_tty_write, 1892 .write_room = acm_tty_write_room, 1893 .ioctl = acm_tty_ioctl, 1894 .throttle = acm_tty_throttle, 1895 .unthrottle = acm_tty_unthrottle, 1896 .chars_in_buffer = acm_tty_chars_in_buffer, 1897 .break_ctl = acm_tty_break_ctl, 1898 .set_termios = acm_tty_set_termios, 1899 .tiocmget = acm_tty_tiocmget, 1900 .tiocmset = acm_tty_tiocmset, 1901 }; 1902 1903 /* 1904 * Init / exit. 1905 */ 1906 1907 static int __init acm_init(void) 1908 { 1909 int retval; 1910 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1911 if (!acm_tty_driver) 1912 return -ENOMEM; 1913 acm_tty_driver->driver_name = "acm", 1914 acm_tty_driver->name = "ttyACM", 1915 acm_tty_driver->major = ACM_TTY_MAJOR, 1916 acm_tty_driver->minor_start = 0, 1917 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1918 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1919 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1920 acm_tty_driver->init_termios = tty_std_termios; 1921 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1922 HUPCL | CLOCAL; 1923 tty_set_operations(acm_tty_driver, &acm_ops); 1924 1925 retval = tty_register_driver(acm_tty_driver); 1926 if (retval) { 1927 put_tty_driver(acm_tty_driver); 1928 return retval; 1929 } 1930 1931 retval = usb_register(&acm_driver); 1932 if (retval) { 1933 tty_unregister_driver(acm_tty_driver); 1934 put_tty_driver(acm_tty_driver); 1935 return retval; 1936 } 1937 1938 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1939 1940 return 0; 1941 } 1942 1943 static void __exit acm_exit(void) 1944 { 1945 usb_deregister(&acm_driver); 1946 tty_unregister_driver(acm_tty_driver); 1947 put_tty_driver(acm_tty_driver); 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