1 /* 2 * cdc-acm.c 3 * 4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 11 * 12 * USB Abstract Control Model driver for USB modems and ISDN adapters 13 * 14 * Sponsored by SuSE 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 */ 30 31 #undef DEBUG 32 #undef VERBOSE_DEBUG 33 34 #include <linux/kernel.h> 35 #include <linux/errno.h> 36 #include <linux/init.h> 37 #include <linux/slab.h> 38 #include <linux/tty.h> 39 #include <linux/serial.h> 40 #include <linux/tty_driver.h> 41 #include <linux/tty_flip.h> 42 #include <linux/module.h> 43 #include <linux/mutex.h> 44 #include <linux/uaccess.h> 45 #include <linux/usb.h> 46 #include <linux/usb/cdc.h> 47 #include <asm/byteorder.h> 48 #include <asm/unaligned.h> 49 #include <linux/list.h> 50 51 #include "cdc-acm.h" 52 53 54 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 55 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 56 57 static struct usb_driver acm_driver; 58 static struct tty_driver *acm_tty_driver; 59 static struct acm *acm_table[ACM_TTY_MINORS]; 60 61 static DEFINE_MUTEX(acm_table_lock); 62 63 /* 64 * acm_table accessors 65 */ 66 67 /* 68 * Look up an ACM structure by index. If found and not disconnected, increment 69 * its refcount and return it with its mutex held. 70 */ 71 static struct acm *acm_get_by_index(unsigned index) 72 { 73 struct acm *acm; 74 75 mutex_lock(&acm_table_lock); 76 acm = acm_table[index]; 77 if (acm) { 78 mutex_lock(&acm->mutex); 79 if (acm->disconnected) { 80 mutex_unlock(&acm->mutex); 81 acm = NULL; 82 } else { 83 tty_port_get(&acm->port); 84 mutex_unlock(&acm->mutex); 85 } 86 } 87 mutex_unlock(&acm_table_lock); 88 return acm; 89 } 90 91 /* 92 * Try to find an available minor number and if found, associate it with 'acm'. 93 */ 94 static int acm_alloc_minor(struct acm *acm) 95 { 96 int minor; 97 98 mutex_lock(&acm_table_lock); 99 for (minor = 0; minor < ACM_TTY_MINORS; minor++) { 100 if (!acm_table[minor]) { 101 acm_table[minor] = acm; 102 break; 103 } 104 } 105 mutex_unlock(&acm_table_lock); 106 107 return minor; 108 } 109 110 /* Release the minor number associated with 'acm'. */ 111 static void acm_release_minor(struct acm *acm) 112 { 113 mutex_lock(&acm_table_lock); 114 acm_table[acm->minor] = NULL; 115 mutex_unlock(&acm_table_lock); 116 } 117 118 /* 119 * Functions for ACM control messages. 120 */ 121 122 static int acm_ctrl_msg(struct acm *acm, int request, int value, 123 void *buf, int len) 124 { 125 int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 126 request, USB_RT_ACM, value, 127 acm->control->altsetting[0].desc.bInterfaceNumber, 128 buf, len, 5000); 129 dev_dbg(&acm->control->dev, 130 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 131 __func__, request, value, len, retval); 132 return retval < 0 ? retval : 0; 133 } 134 135 /* devices aren't required to support these requests. 136 * the cdc acm descriptor tells whether they do... 137 */ 138 #define acm_set_control(acm, control) \ 139 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) 140 #define acm_set_line(acm, line) \ 141 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 142 #define acm_send_break(acm, ms) \ 143 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 144 145 /* 146 * Write buffer management. 147 * All of these assume proper locks taken by the caller. 148 */ 149 150 static int acm_wb_alloc(struct acm *acm) 151 { 152 int i, wbn; 153 struct acm_wb *wb; 154 155 wbn = 0; 156 i = 0; 157 for (;;) { 158 wb = &acm->wb[wbn]; 159 if (!wb->use) { 160 wb->use = 1; 161 return wbn; 162 } 163 wbn = (wbn + 1) % ACM_NW; 164 if (++i >= ACM_NW) 165 return -1; 166 } 167 } 168 169 static int acm_wb_is_avail(struct acm *acm) 170 { 171 int i, n; 172 unsigned long flags; 173 174 n = ACM_NW; 175 spin_lock_irqsave(&acm->write_lock, flags); 176 for (i = 0; i < ACM_NW; i++) 177 n -= acm->wb[i].use; 178 spin_unlock_irqrestore(&acm->write_lock, flags); 179 return n; 180 } 181 182 /* 183 * Finish write. Caller must hold acm->write_lock 184 */ 185 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 186 { 187 wb->use = 0; 188 acm->transmitting--; 189 usb_autopm_put_interface_async(acm->control); 190 } 191 192 /* 193 * Poke write. 194 * 195 * the caller is responsible for locking 196 */ 197 198 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 199 { 200 int rc; 201 202 acm->transmitting++; 203 204 wb->urb->transfer_buffer = wb->buf; 205 wb->urb->transfer_dma = wb->dmah; 206 wb->urb->transfer_buffer_length = wb->len; 207 wb->urb->dev = acm->dev; 208 209 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 210 if (rc < 0) { 211 dev_err(&acm->data->dev, 212 "%s - usb_submit_urb(write bulk) failed: %d\n", 213 __func__, rc); 214 acm_write_done(acm, wb); 215 } 216 return rc; 217 } 218 219 /* 220 * attributes exported through sysfs 221 */ 222 static ssize_t show_caps 223 (struct device *dev, struct device_attribute *attr, char *buf) 224 { 225 struct usb_interface *intf = to_usb_interface(dev); 226 struct acm *acm = usb_get_intfdata(intf); 227 228 return sprintf(buf, "%d", acm->ctrl_caps); 229 } 230 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); 231 232 static ssize_t show_country_codes 233 (struct device *dev, struct device_attribute *attr, char *buf) 234 { 235 struct usb_interface *intf = to_usb_interface(dev); 236 struct acm *acm = usb_get_intfdata(intf); 237 238 memcpy(buf, acm->country_codes, acm->country_code_size); 239 return acm->country_code_size; 240 } 241 242 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); 243 244 static ssize_t show_country_rel_date 245 (struct device *dev, struct device_attribute *attr, char *buf) 246 { 247 struct usb_interface *intf = to_usb_interface(dev); 248 struct acm *acm = usb_get_intfdata(intf); 249 250 return sprintf(buf, "%d", acm->country_rel_date); 251 } 252 253 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); 254 /* 255 * Interrupt handlers for various ACM device responses 256 */ 257 258 /* control interface reports status changes with "interrupt" transfers */ 259 static void acm_ctrl_irq(struct urb *urb) 260 { 261 struct acm *acm = urb->context; 262 struct usb_cdc_notification *dr = urb->transfer_buffer; 263 unsigned char *data; 264 int newctrl; 265 int difference; 266 int retval; 267 int status = urb->status; 268 269 switch (status) { 270 case 0: 271 /* success */ 272 break; 273 case -ECONNRESET: 274 case -ENOENT: 275 case -ESHUTDOWN: 276 /* this urb is terminated, clean up */ 277 dev_dbg(&acm->control->dev, 278 "%s - urb shutting down with status: %d\n", 279 __func__, status); 280 return; 281 default: 282 dev_dbg(&acm->control->dev, 283 "%s - nonzero urb status received: %d\n", 284 __func__, status); 285 goto exit; 286 } 287 288 usb_mark_last_busy(acm->dev); 289 290 data = (unsigned char *)(dr + 1); 291 switch (dr->bNotificationType) { 292 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 293 dev_dbg(&acm->control->dev, "%s - network connection: %d\n", 294 __func__, dr->wValue); 295 break; 296 297 case USB_CDC_NOTIFY_SERIAL_STATE: 298 newctrl = get_unaligned_le16(data); 299 300 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 301 dev_dbg(&acm->control->dev, "%s - calling hangup\n", 302 __func__); 303 tty_port_tty_hangup(&acm->port, false); 304 } 305 306 difference = acm->ctrlin ^ newctrl; 307 spin_lock(&acm->read_lock); 308 acm->ctrlin = newctrl; 309 acm->oldcount = acm->iocount; 310 311 if (difference & ACM_CTRL_DSR) 312 acm->iocount.dsr++; 313 if (difference & ACM_CTRL_BRK) 314 acm->iocount.brk++; 315 if (difference & ACM_CTRL_RI) 316 acm->iocount.rng++; 317 if (difference & ACM_CTRL_DCD) 318 acm->iocount.dcd++; 319 if (difference & ACM_CTRL_FRAMING) 320 acm->iocount.frame++; 321 if (difference & ACM_CTRL_PARITY) 322 acm->iocount.parity++; 323 if (difference & ACM_CTRL_OVERRUN) 324 acm->iocount.overrun++; 325 spin_unlock(&acm->read_lock); 326 327 if (difference) 328 wake_up_all(&acm->wioctl); 329 330 break; 331 332 default: 333 dev_dbg(&acm->control->dev, 334 "%s - unknown notification %d received: index %d " 335 "len %d data0 %d data1 %d\n", 336 __func__, 337 dr->bNotificationType, dr->wIndex, 338 dr->wLength, data[0], data[1]); 339 break; 340 } 341 exit: 342 retval = usb_submit_urb(urb, GFP_ATOMIC); 343 if (retval) 344 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", 345 __func__, retval); 346 } 347 348 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 349 { 350 int res; 351 352 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 353 return 0; 354 355 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index); 356 357 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 358 if (res) { 359 if (res != -EPERM) { 360 dev_err(&acm->data->dev, 361 "%s - usb_submit_urb failed: %d\n", 362 __func__, res); 363 } 364 set_bit(index, &acm->read_urbs_free); 365 return res; 366 } 367 368 return 0; 369 } 370 371 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 372 { 373 int res; 374 int i; 375 376 for (i = 0; i < acm->rx_buflimit; ++i) { 377 res = acm_submit_read_urb(acm, i, mem_flags); 378 if (res) 379 return res; 380 } 381 382 return 0; 383 } 384 385 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 386 { 387 if (!urb->actual_length) 388 return; 389 390 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 391 urb->actual_length); 392 tty_flip_buffer_push(&acm->port); 393 } 394 395 static void acm_read_bulk_callback(struct urb *urb) 396 { 397 struct acm_rb *rb = urb->context; 398 struct acm *acm = rb->instance; 399 unsigned long flags; 400 401 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__, 402 rb->index, urb->actual_length); 403 set_bit(rb->index, &acm->read_urbs_free); 404 405 if (!acm->dev) { 406 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 407 return; 408 } 409 usb_mark_last_busy(acm->dev); 410 411 if (urb->status) { 412 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n", 413 __func__, urb->status); 414 return; 415 } 416 acm_process_read_urb(acm, urb); 417 418 /* throttle device if requested by tty */ 419 spin_lock_irqsave(&acm->read_lock, flags); 420 acm->throttled = acm->throttle_req; 421 if (!acm->throttled && !acm->susp_count) { 422 spin_unlock_irqrestore(&acm->read_lock, flags); 423 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 424 } else { 425 spin_unlock_irqrestore(&acm->read_lock, flags); 426 } 427 } 428 429 /* data interface wrote those outgoing bytes */ 430 static void acm_write_bulk(struct urb *urb) 431 { 432 struct acm_wb *wb = urb->context; 433 struct acm *acm = wb->instance; 434 unsigned long flags; 435 436 if (urb->status || (urb->actual_length != urb->transfer_buffer_length)) 437 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n", 438 __func__, 439 urb->actual_length, 440 urb->transfer_buffer_length, 441 urb->status); 442 443 spin_lock_irqsave(&acm->write_lock, flags); 444 acm_write_done(acm, wb); 445 spin_unlock_irqrestore(&acm->write_lock, flags); 446 schedule_work(&acm->work); 447 } 448 449 static void acm_softint(struct work_struct *work) 450 { 451 struct acm *acm = container_of(work, struct acm, work); 452 453 dev_vdbg(&acm->data->dev, "%s\n", __func__); 454 455 tty_port_tty_wakeup(&acm->port); 456 } 457 458 /* 459 * TTY handlers 460 */ 461 462 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 463 { 464 struct acm *acm; 465 int retval; 466 467 dev_dbg(tty->dev, "%s\n", __func__); 468 469 acm = acm_get_by_index(tty->index); 470 if (!acm) 471 return -ENODEV; 472 473 retval = tty_standard_install(driver, tty); 474 if (retval) 475 goto error_init_termios; 476 477 tty->driver_data = acm; 478 479 return 0; 480 481 error_init_termios: 482 tty_port_put(&acm->port); 483 return retval; 484 } 485 486 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 487 { 488 struct acm *acm = tty->driver_data; 489 490 dev_dbg(tty->dev, "%s\n", __func__); 491 492 return tty_port_open(&acm->port, tty, filp); 493 } 494 495 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 496 { 497 struct acm *acm = container_of(port, struct acm, port); 498 int retval = -ENODEV; 499 500 dev_dbg(&acm->control->dev, "%s\n", __func__); 501 502 mutex_lock(&acm->mutex); 503 if (acm->disconnected) 504 goto disconnected; 505 506 retval = usb_autopm_get_interface(acm->control); 507 if (retval) 508 goto error_get_interface; 509 510 /* 511 * FIXME: Why do we need this? Allocating 64K of physically contiguous 512 * memory is really nasty... 513 */ 514 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 515 acm->control->needs_remote_wakeup = 1; 516 517 acm->ctrlurb->dev = acm->dev; 518 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { 519 dev_err(&acm->control->dev, 520 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 521 goto error_submit_urb; 522 } 523 524 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS; 525 if (acm_set_control(acm, acm->ctrlout) < 0 && 526 (acm->ctrl_caps & USB_CDC_CAP_LINE)) 527 goto error_set_control; 528 529 usb_autopm_put_interface(acm->control); 530 531 /* 532 * Unthrottle device in case the TTY was closed while throttled. 533 */ 534 spin_lock_irq(&acm->read_lock); 535 acm->throttled = 0; 536 acm->throttle_req = 0; 537 spin_unlock_irq(&acm->read_lock); 538 539 if (acm_submit_read_urbs(acm, GFP_KERNEL)) 540 goto error_submit_read_urbs; 541 542 mutex_unlock(&acm->mutex); 543 544 return 0; 545 546 error_submit_read_urbs: 547 acm->ctrlout = 0; 548 acm_set_control(acm, acm->ctrlout); 549 error_set_control: 550 usb_kill_urb(acm->ctrlurb); 551 error_submit_urb: 552 usb_autopm_put_interface(acm->control); 553 error_get_interface: 554 disconnected: 555 mutex_unlock(&acm->mutex); 556 return retval; 557 } 558 559 static void acm_port_destruct(struct tty_port *port) 560 { 561 struct acm *acm = container_of(port, struct acm, port); 562 563 dev_dbg(&acm->control->dev, "%s\n", __func__); 564 565 acm_release_minor(acm); 566 usb_put_intf(acm->control); 567 kfree(acm->country_codes); 568 kfree(acm); 569 } 570 571 static void acm_port_shutdown(struct tty_port *port) 572 { 573 struct acm *acm = container_of(port, struct acm, port); 574 int i; 575 576 dev_dbg(&acm->control->dev, "%s\n", __func__); 577 578 mutex_lock(&acm->mutex); 579 if (!acm->disconnected) { 580 usb_autopm_get_interface(acm->control); 581 acm_set_control(acm, acm->ctrlout = 0); 582 usb_kill_urb(acm->ctrlurb); 583 for (i = 0; i < ACM_NW; i++) 584 usb_kill_urb(acm->wb[i].urb); 585 for (i = 0; i < acm->rx_buflimit; i++) 586 usb_kill_urb(acm->read_urbs[i]); 587 acm->control->needs_remote_wakeup = 0; 588 usb_autopm_put_interface(acm->control); 589 } 590 mutex_unlock(&acm->mutex); 591 } 592 593 static void acm_tty_cleanup(struct tty_struct *tty) 594 { 595 struct acm *acm = tty->driver_data; 596 dev_dbg(&acm->control->dev, "%s\n", __func__); 597 tty_port_put(&acm->port); 598 } 599 600 static void acm_tty_hangup(struct tty_struct *tty) 601 { 602 struct acm *acm = tty->driver_data; 603 dev_dbg(&acm->control->dev, "%s\n", __func__); 604 tty_port_hangup(&acm->port); 605 } 606 607 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 608 { 609 struct acm *acm = tty->driver_data; 610 dev_dbg(&acm->control->dev, "%s\n", __func__); 611 tty_port_close(&acm->port, tty, filp); 612 } 613 614 static int acm_tty_write(struct tty_struct *tty, 615 const unsigned char *buf, int count) 616 { 617 struct acm *acm = tty->driver_data; 618 int stat; 619 unsigned long flags; 620 int wbn; 621 struct acm_wb *wb; 622 623 if (!count) 624 return 0; 625 626 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count); 627 628 spin_lock_irqsave(&acm->write_lock, flags); 629 wbn = acm_wb_alloc(acm); 630 if (wbn < 0) { 631 spin_unlock_irqrestore(&acm->write_lock, flags); 632 return 0; 633 } 634 wb = &acm->wb[wbn]; 635 636 if (!acm->dev) { 637 wb->use = 0; 638 spin_unlock_irqrestore(&acm->write_lock, flags); 639 return -ENODEV; 640 } 641 642 count = (count > acm->writesize) ? acm->writesize : count; 643 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count); 644 memcpy(wb->buf, buf, count); 645 wb->len = count; 646 647 usb_autopm_get_interface_async(acm->control); 648 if (acm->susp_count) { 649 if (!acm->delayed_wb) 650 acm->delayed_wb = wb; 651 else 652 usb_autopm_put_interface_async(acm->control); 653 spin_unlock_irqrestore(&acm->write_lock, flags); 654 return count; /* A white lie */ 655 } 656 usb_mark_last_busy(acm->dev); 657 658 stat = acm_start_wb(acm, wb); 659 spin_unlock_irqrestore(&acm->write_lock, flags); 660 661 if (stat < 0) 662 return stat; 663 return count; 664 } 665 666 static int acm_tty_write_room(struct tty_struct *tty) 667 { 668 struct acm *acm = tty->driver_data; 669 /* 670 * Do not let the line discipline to know that we have a reserve, 671 * or it might get too enthusiastic. 672 */ 673 return acm_wb_is_avail(acm) ? acm->writesize : 0; 674 } 675 676 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 677 { 678 struct acm *acm = tty->driver_data; 679 /* 680 * if the device was unplugged then any remaining characters fell out 681 * of the connector ;) 682 */ 683 if (acm->disconnected) 684 return 0; 685 /* 686 * This is inaccurate (overcounts), but it works. 687 */ 688 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 689 } 690 691 static void acm_tty_throttle(struct tty_struct *tty) 692 { 693 struct acm *acm = tty->driver_data; 694 695 spin_lock_irq(&acm->read_lock); 696 acm->throttle_req = 1; 697 spin_unlock_irq(&acm->read_lock); 698 } 699 700 static void acm_tty_unthrottle(struct tty_struct *tty) 701 { 702 struct acm *acm = tty->driver_data; 703 unsigned int was_throttled; 704 705 spin_lock_irq(&acm->read_lock); 706 was_throttled = acm->throttled; 707 acm->throttled = 0; 708 acm->throttle_req = 0; 709 spin_unlock_irq(&acm->read_lock); 710 711 if (was_throttled) 712 acm_submit_read_urbs(acm, GFP_KERNEL); 713 } 714 715 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 716 { 717 struct acm *acm = tty->driver_data; 718 int retval; 719 720 retval = acm_send_break(acm, state ? 0xffff : 0); 721 if (retval < 0) 722 dev_dbg(&acm->control->dev, "%s - send break failed\n", 723 __func__); 724 return retval; 725 } 726 727 static int acm_tty_tiocmget(struct tty_struct *tty) 728 { 729 struct acm *acm = tty->driver_data; 730 731 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 732 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 733 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 734 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 735 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 736 TIOCM_CTS; 737 } 738 739 static int acm_tty_tiocmset(struct tty_struct *tty, 740 unsigned int set, unsigned int clear) 741 { 742 struct acm *acm = tty->driver_data; 743 unsigned int newctrl; 744 745 newctrl = acm->ctrlout; 746 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 747 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 748 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 749 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 750 751 newctrl = (newctrl & ~clear) | set; 752 753 if (acm->ctrlout == newctrl) 754 return 0; 755 return acm_set_control(acm, acm->ctrlout = newctrl); 756 } 757 758 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 759 { 760 struct serial_struct tmp; 761 762 if (!info) 763 return -EINVAL; 764 765 memset(&tmp, 0, sizeof(tmp)); 766 tmp.flags = ASYNC_LOW_LATENCY; 767 tmp.xmit_fifo_size = acm->writesize; 768 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 769 tmp.close_delay = acm->port.close_delay / 10; 770 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 771 ASYNC_CLOSING_WAIT_NONE : 772 acm->port.closing_wait / 10; 773 774 if (copy_to_user(info, &tmp, sizeof(tmp))) 775 return -EFAULT; 776 else 777 return 0; 778 } 779 780 static int set_serial_info(struct acm *acm, 781 struct serial_struct __user *newinfo) 782 { 783 struct serial_struct new_serial; 784 unsigned int closing_wait, close_delay; 785 int retval = 0; 786 787 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 788 return -EFAULT; 789 790 close_delay = new_serial.close_delay * 10; 791 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 792 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 793 794 mutex_lock(&acm->port.mutex); 795 796 if (!capable(CAP_SYS_ADMIN)) { 797 if ((close_delay != acm->port.close_delay) || 798 (closing_wait != acm->port.closing_wait)) 799 retval = -EPERM; 800 else 801 retval = -EOPNOTSUPP; 802 } else { 803 acm->port.close_delay = close_delay; 804 acm->port.closing_wait = closing_wait; 805 } 806 807 mutex_unlock(&acm->port.mutex); 808 return retval; 809 } 810 811 static int wait_serial_change(struct acm *acm, unsigned long arg) 812 { 813 int rv = 0; 814 DECLARE_WAITQUEUE(wait, current); 815 struct async_icount old, new; 816 817 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD )) 818 return -EINVAL; 819 do { 820 spin_lock_irq(&acm->read_lock); 821 old = acm->oldcount; 822 new = acm->iocount; 823 acm->oldcount = new; 824 spin_unlock_irq(&acm->read_lock); 825 826 if ((arg & TIOCM_DSR) && 827 old.dsr != new.dsr) 828 break; 829 if ((arg & TIOCM_CD) && 830 old.dcd != new.dcd) 831 break; 832 if ((arg & TIOCM_RI) && 833 old.rng != new.rng) 834 break; 835 836 add_wait_queue(&acm->wioctl, &wait); 837 set_current_state(TASK_INTERRUPTIBLE); 838 schedule(); 839 remove_wait_queue(&acm->wioctl, &wait); 840 if (acm->disconnected) { 841 if (arg & TIOCM_CD) 842 break; 843 else 844 rv = -ENODEV; 845 } else { 846 if (signal_pending(current)) 847 rv = -ERESTARTSYS; 848 } 849 } while (!rv); 850 851 852 853 return rv; 854 } 855 856 static int get_serial_usage(struct acm *acm, 857 struct serial_icounter_struct __user *count) 858 { 859 struct serial_icounter_struct icount; 860 int rv = 0; 861 862 memset(&icount, 0, sizeof(icount)); 863 icount.dsr = acm->iocount.dsr; 864 icount.rng = acm->iocount.rng; 865 icount.dcd = acm->iocount.dcd; 866 icount.frame = acm->iocount.frame; 867 icount.overrun = acm->iocount.overrun; 868 icount.parity = acm->iocount.parity; 869 icount.brk = acm->iocount.brk; 870 871 if (copy_to_user(count, &icount, sizeof(icount)) > 0) 872 rv = -EFAULT; 873 874 return rv; 875 } 876 877 static int acm_tty_ioctl(struct tty_struct *tty, 878 unsigned int cmd, unsigned long arg) 879 { 880 struct acm *acm = tty->driver_data; 881 int rv = -ENOIOCTLCMD; 882 883 switch (cmd) { 884 case TIOCGSERIAL: /* gets serial port data */ 885 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 886 break; 887 case TIOCSSERIAL: 888 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 889 break; 890 case TIOCMIWAIT: 891 rv = usb_autopm_get_interface(acm->control); 892 if (rv < 0) { 893 rv = -EIO; 894 break; 895 } 896 rv = wait_serial_change(acm, arg); 897 usb_autopm_put_interface(acm->control); 898 break; 899 case TIOCGICOUNT: 900 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg); 901 break; 902 } 903 904 return rv; 905 } 906 907 static void acm_tty_set_termios(struct tty_struct *tty, 908 struct ktermios *termios_old) 909 { 910 struct acm *acm = tty->driver_data; 911 struct ktermios *termios = &tty->termios; 912 struct usb_cdc_line_coding newline; 913 int newctrl = acm->ctrlout; 914 915 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 916 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 917 newline.bParityType = termios->c_cflag & PARENB ? 918 (termios->c_cflag & PARODD ? 1 : 2) + 919 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 920 switch (termios->c_cflag & CSIZE) { 921 case CS5: 922 newline.bDataBits = 5; 923 break; 924 case CS6: 925 newline.bDataBits = 6; 926 break; 927 case CS7: 928 newline.bDataBits = 7; 929 break; 930 case CS8: 931 default: 932 newline.bDataBits = 8; 933 break; 934 } 935 /* FIXME: Needs to clear unsupported bits in the termios */ 936 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 937 938 if (!newline.dwDTERate) { 939 newline.dwDTERate = acm->line.dwDTERate; 940 newctrl &= ~ACM_CTRL_DTR; 941 } else 942 newctrl |= ACM_CTRL_DTR; 943 944 if (newctrl != acm->ctrlout) 945 acm_set_control(acm, acm->ctrlout = newctrl); 946 947 if (memcmp(&acm->line, &newline, sizeof newline)) { 948 memcpy(&acm->line, &newline, sizeof newline); 949 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 950 __func__, 951 le32_to_cpu(newline.dwDTERate), 952 newline.bCharFormat, newline.bParityType, 953 newline.bDataBits); 954 acm_set_line(acm, &acm->line); 955 } 956 } 957 958 static const struct tty_port_operations acm_port_ops = { 959 .shutdown = acm_port_shutdown, 960 .activate = acm_port_activate, 961 .destruct = acm_port_destruct, 962 }; 963 964 /* 965 * USB probe and disconnect routines. 966 */ 967 968 /* Little helpers: write/read buffers free */ 969 static void acm_write_buffers_free(struct acm *acm) 970 { 971 int i; 972 struct acm_wb *wb; 973 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 974 975 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 976 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); 977 } 978 979 static void acm_read_buffers_free(struct acm *acm) 980 { 981 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 982 int i; 983 984 for (i = 0; i < acm->rx_buflimit; i++) 985 usb_free_coherent(usb_dev, acm->readsize, 986 acm->read_buffers[i].base, acm->read_buffers[i].dma); 987 } 988 989 /* Little helper: write buffers allocate */ 990 static int acm_write_buffers_alloc(struct acm *acm) 991 { 992 int i; 993 struct acm_wb *wb; 994 995 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 996 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 997 &wb->dmah); 998 if (!wb->buf) { 999 while (i != 0) { 1000 --i; 1001 --wb; 1002 usb_free_coherent(acm->dev, acm->writesize, 1003 wb->buf, wb->dmah); 1004 } 1005 return -ENOMEM; 1006 } 1007 } 1008 return 0; 1009 } 1010 1011 static int acm_probe(struct usb_interface *intf, 1012 const struct usb_device_id *id) 1013 { 1014 struct usb_cdc_union_desc *union_header = NULL; 1015 struct usb_cdc_country_functional_desc *cfd = NULL; 1016 unsigned char *buffer = intf->altsetting->extra; 1017 int buflen = intf->altsetting->extralen; 1018 struct usb_interface *control_interface; 1019 struct usb_interface *data_interface; 1020 struct usb_endpoint_descriptor *epctrl = NULL; 1021 struct usb_endpoint_descriptor *epread = NULL; 1022 struct usb_endpoint_descriptor *epwrite = NULL; 1023 struct usb_device *usb_dev = interface_to_usbdev(intf); 1024 struct acm *acm; 1025 int minor; 1026 int ctrlsize, readsize; 1027 u8 *buf; 1028 u8 ac_management_function = 0; 1029 u8 call_management_function = 0; 1030 int call_interface_num = -1; 1031 int data_interface_num = -1; 1032 unsigned long quirks; 1033 int num_rx_buf; 1034 int i; 1035 int combined_interfaces = 0; 1036 struct device *tty_dev; 1037 int rv = -ENOMEM; 1038 1039 /* normal quirks */ 1040 quirks = (unsigned long)id->driver_info; 1041 1042 if (quirks == IGNORE_DEVICE) 1043 return -ENODEV; 1044 1045 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1046 1047 /* handle quirks deadly to normal probing*/ 1048 if (quirks == NO_UNION_NORMAL) { 1049 data_interface = usb_ifnum_to_if(usb_dev, 1); 1050 control_interface = usb_ifnum_to_if(usb_dev, 0); 1051 goto skip_normal_probe; 1052 } 1053 1054 /* normal probing*/ 1055 if (!buffer) { 1056 dev_err(&intf->dev, "Weird descriptor references\n"); 1057 return -EINVAL; 1058 } 1059 1060 if (!buflen) { 1061 if (intf->cur_altsetting->endpoint && 1062 intf->cur_altsetting->endpoint->extralen && 1063 intf->cur_altsetting->endpoint->extra) { 1064 dev_dbg(&intf->dev, 1065 "Seeking extra descriptors on endpoint\n"); 1066 buflen = intf->cur_altsetting->endpoint->extralen; 1067 buffer = intf->cur_altsetting->endpoint->extra; 1068 } else { 1069 dev_err(&intf->dev, 1070 "Zero length descriptor references\n"); 1071 return -EINVAL; 1072 } 1073 } 1074 1075 while (buflen > 0) { 1076 if (buffer[1] != USB_DT_CS_INTERFACE) { 1077 dev_err(&intf->dev, "skipping garbage\n"); 1078 goto next_desc; 1079 } 1080 1081 switch (buffer[2]) { 1082 case USB_CDC_UNION_TYPE: /* we've found it */ 1083 if (union_header) { 1084 dev_err(&intf->dev, "More than one " 1085 "union descriptor, skipping ...\n"); 1086 goto next_desc; 1087 } 1088 union_header = (struct usb_cdc_union_desc *)buffer; 1089 break; 1090 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ 1091 cfd = (struct usb_cdc_country_functional_desc *)buffer; 1092 break; 1093 case USB_CDC_HEADER_TYPE: /* maybe check version */ 1094 break; /* for now we ignore it */ 1095 case USB_CDC_ACM_TYPE: 1096 ac_management_function = buffer[3]; 1097 break; 1098 case USB_CDC_CALL_MANAGEMENT_TYPE: 1099 call_management_function = buffer[3]; 1100 call_interface_num = buffer[4]; 1101 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3) 1102 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); 1103 break; 1104 default: 1105 /* there are LOTS more CDC descriptors that 1106 * could legitimately be found here. 1107 */ 1108 dev_dbg(&intf->dev, "Ignoring descriptor: " 1109 "type %02x, length %d\n", 1110 buffer[2], buffer[0]); 1111 break; 1112 } 1113 next_desc: 1114 buflen -= buffer[0]; 1115 buffer += buffer[0]; 1116 } 1117 1118 if (!union_header) { 1119 if (call_interface_num > 0) { 1120 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1121 /* quirks for Droids MuIn LCD */ 1122 if (quirks & NO_DATA_INTERFACE) 1123 data_interface = usb_ifnum_to_if(usb_dev, 0); 1124 else 1125 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); 1126 control_interface = intf; 1127 } else { 1128 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1129 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1130 return -ENODEV; 1131 } else { 1132 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1133 combined_interfaces = 1; 1134 control_interface = data_interface = intf; 1135 goto look_for_collapsed_interface; 1136 } 1137 } 1138 } else { 1139 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1140 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); 1141 if (!control_interface || !data_interface) { 1142 dev_dbg(&intf->dev, "no interfaces\n"); 1143 return -ENODEV; 1144 } 1145 } 1146 1147 if (data_interface_num != call_interface_num) 1148 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1149 1150 if (control_interface == data_interface) { 1151 /* some broken devices designed for windows work this way */ 1152 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1153 combined_interfaces = 1; 1154 /* a popular other OS doesn't use it */ 1155 quirks |= NO_CAP_LINE; 1156 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1157 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1158 return -EINVAL; 1159 } 1160 look_for_collapsed_interface: 1161 for (i = 0; i < 3; i++) { 1162 struct usb_endpoint_descriptor *ep; 1163 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1164 1165 if (usb_endpoint_is_int_in(ep)) 1166 epctrl = ep; 1167 else if (usb_endpoint_is_bulk_out(ep)) 1168 epwrite = ep; 1169 else if (usb_endpoint_is_bulk_in(ep)) 1170 epread = ep; 1171 else 1172 return -EINVAL; 1173 } 1174 if (!epctrl || !epread || !epwrite) 1175 return -ENODEV; 1176 else 1177 goto made_compressed_probe; 1178 } 1179 1180 skip_normal_probe: 1181 1182 /*workaround for switched interfaces */ 1183 if (data_interface->cur_altsetting->desc.bInterfaceClass 1184 != CDC_DATA_INTERFACE_TYPE) { 1185 if (control_interface->cur_altsetting->desc.bInterfaceClass 1186 == CDC_DATA_INTERFACE_TYPE) { 1187 struct usb_interface *t; 1188 dev_dbg(&intf->dev, 1189 "Your device has switched interfaces.\n"); 1190 t = control_interface; 1191 control_interface = data_interface; 1192 data_interface = t; 1193 } else { 1194 return -EINVAL; 1195 } 1196 } 1197 1198 /* Accept probe requests only for the control interface */ 1199 if (!combined_interfaces && intf != control_interface) 1200 return -ENODEV; 1201 1202 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1203 /* valid in this context */ 1204 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1205 return -EBUSY; 1206 } 1207 1208 1209 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1210 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1211 return -EINVAL; 1212 1213 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1214 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1215 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1216 1217 1218 /* workaround for switched endpoints */ 1219 if (!usb_endpoint_dir_in(epread)) { 1220 /* descriptors are swapped */ 1221 struct usb_endpoint_descriptor *t; 1222 dev_dbg(&intf->dev, 1223 "The data interface has switched endpoints\n"); 1224 t = epread; 1225 epread = epwrite; 1226 epwrite = t; 1227 } 1228 made_compressed_probe: 1229 dev_dbg(&intf->dev, "interfaces are valid\n"); 1230 1231 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1232 if (acm == NULL) { 1233 dev_err(&intf->dev, "out of memory (acm kzalloc)\n"); 1234 goto alloc_fail; 1235 } 1236 1237 minor = acm_alloc_minor(acm); 1238 if (minor == ACM_TTY_MINORS) { 1239 dev_err(&intf->dev, "no more free acm devices\n"); 1240 kfree(acm); 1241 return -ENODEV; 1242 } 1243 1244 ctrlsize = usb_endpoint_maxp(epctrl); 1245 readsize = usb_endpoint_maxp(epread) * 1246 (quirks == SINGLE_RX_URB ? 1 : 2); 1247 acm->combined_interfaces = combined_interfaces; 1248 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1249 acm->control = control_interface; 1250 acm->data = data_interface; 1251 acm->minor = minor; 1252 acm->dev = usb_dev; 1253 acm->ctrl_caps = ac_management_function; 1254 if (quirks & NO_CAP_LINE) 1255 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1256 acm->ctrlsize = ctrlsize; 1257 acm->readsize = readsize; 1258 acm->rx_buflimit = num_rx_buf; 1259 INIT_WORK(&acm->work, acm_softint); 1260 init_waitqueue_head(&acm->wioctl); 1261 spin_lock_init(&acm->write_lock); 1262 spin_lock_init(&acm->read_lock); 1263 mutex_init(&acm->mutex); 1264 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1265 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1266 if (acm->is_int_ep) 1267 acm->bInterval = epread->bInterval; 1268 tty_port_init(&acm->port); 1269 acm->port.ops = &acm_port_ops; 1270 1271 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1272 if (!buf) { 1273 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n"); 1274 goto alloc_fail2; 1275 } 1276 acm->ctrl_buffer = buf; 1277 1278 if (acm_write_buffers_alloc(acm) < 0) { 1279 dev_err(&intf->dev, "out of memory (write buffer alloc)\n"); 1280 goto alloc_fail4; 1281 } 1282 1283 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1284 if (!acm->ctrlurb) { 1285 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); 1286 goto alloc_fail5; 1287 } 1288 for (i = 0; i < num_rx_buf; i++) { 1289 struct acm_rb *rb = &(acm->read_buffers[i]); 1290 struct urb *urb; 1291 1292 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1293 &rb->dma); 1294 if (!rb->base) { 1295 dev_err(&intf->dev, "out of memory " 1296 "(read bufs usb_alloc_coherent)\n"); 1297 goto alloc_fail6; 1298 } 1299 rb->index = i; 1300 rb->instance = acm; 1301 1302 urb = usb_alloc_urb(0, GFP_KERNEL); 1303 if (!urb) { 1304 dev_err(&intf->dev, 1305 "out of memory (read urbs usb_alloc_urb)\n"); 1306 goto alloc_fail6; 1307 } 1308 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1309 urb->transfer_dma = rb->dma; 1310 if (acm->is_int_ep) { 1311 usb_fill_int_urb(urb, acm->dev, 1312 acm->rx_endpoint, 1313 rb->base, 1314 acm->readsize, 1315 acm_read_bulk_callback, rb, 1316 acm->bInterval); 1317 } else { 1318 usb_fill_bulk_urb(urb, acm->dev, 1319 acm->rx_endpoint, 1320 rb->base, 1321 acm->readsize, 1322 acm_read_bulk_callback, rb); 1323 } 1324 1325 acm->read_urbs[i] = urb; 1326 __set_bit(i, &acm->read_urbs_free); 1327 } 1328 for (i = 0; i < ACM_NW; i++) { 1329 struct acm_wb *snd = &(acm->wb[i]); 1330 1331 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1332 if (snd->urb == NULL) { 1333 dev_err(&intf->dev, 1334 "out of memory (write urbs usb_alloc_urb)\n"); 1335 goto alloc_fail7; 1336 } 1337 1338 if (usb_endpoint_xfer_int(epwrite)) 1339 usb_fill_int_urb(snd->urb, usb_dev, 1340 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), 1341 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1342 else 1343 usb_fill_bulk_urb(snd->urb, usb_dev, 1344 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), 1345 NULL, acm->writesize, acm_write_bulk, snd); 1346 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1347 snd->instance = acm; 1348 } 1349 1350 usb_set_intfdata(intf, acm); 1351 1352 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1353 if (i < 0) 1354 goto alloc_fail7; 1355 1356 if (cfd) { /* export the country data */ 1357 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1358 if (!acm->country_codes) 1359 goto skip_countries; 1360 acm->country_code_size = cfd->bLength - 4; 1361 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1362 cfd->bLength - 4); 1363 acm->country_rel_date = cfd->iCountryCodeRelDate; 1364 1365 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1366 if (i < 0) { 1367 kfree(acm->country_codes); 1368 acm->country_codes = NULL; 1369 acm->country_code_size = 0; 1370 goto skip_countries; 1371 } 1372 1373 i = device_create_file(&intf->dev, 1374 &dev_attr_iCountryCodeRelDate); 1375 if (i < 0) { 1376 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1377 kfree(acm->country_codes); 1378 acm->country_codes = NULL; 1379 acm->country_code_size = 0; 1380 goto skip_countries; 1381 } 1382 } 1383 1384 skip_countries: 1385 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1386 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1387 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1388 /* works around buggy devices */ 1389 epctrl->bInterval ? epctrl->bInterval : 16); 1390 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1391 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1392 1393 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1394 1395 acm_set_control(acm, acm->ctrlout); 1396 1397 acm->line.dwDTERate = cpu_to_le32(9600); 1398 acm->line.bDataBits = 8; 1399 acm_set_line(acm, &acm->line); 1400 1401 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1402 usb_set_intfdata(data_interface, acm); 1403 1404 usb_get_intf(control_interface); 1405 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1406 &control_interface->dev); 1407 if (IS_ERR(tty_dev)) { 1408 rv = PTR_ERR(tty_dev); 1409 goto alloc_fail8; 1410 } 1411 1412 return 0; 1413 alloc_fail8: 1414 if (acm->country_codes) { 1415 device_remove_file(&acm->control->dev, 1416 &dev_attr_wCountryCodes); 1417 device_remove_file(&acm->control->dev, 1418 &dev_attr_iCountryCodeRelDate); 1419 } 1420 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1421 alloc_fail7: 1422 usb_set_intfdata(intf, NULL); 1423 for (i = 0; i < ACM_NW; i++) 1424 usb_free_urb(acm->wb[i].urb); 1425 alloc_fail6: 1426 for (i = 0; i < num_rx_buf; i++) 1427 usb_free_urb(acm->read_urbs[i]); 1428 acm_read_buffers_free(acm); 1429 usb_free_urb(acm->ctrlurb); 1430 alloc_fail5: 1431 acm_write_buffers_free(acm); 1432 alloc_fail4: 1433 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1434 alloc_fail2: 1435 acm_release_minor(acm); 1436 kfree(acm); 1437 alloc_fail: 1438 return rv; 1439 } 1440 1441 static void stop_data_traffic(struct acm *acm) 1442 { 1443 int i; 1444 1445 dev_dbg(&acm->control->dev, "%s\n", __func__); 1446 1447 usb_kill_urb(acm->ctrlurb); 1448 for (i = 0; i < ACM_NW; i++) 1449 usb_kill_urb(acm->wb[i].urb); 1450 for (i = 0; i < acm->rx_buflimit; i++) 1451 usb_kill_urb(acm->read_urbs[i]); 1452 1453 cancel_work_sync(&acm->work); 1454 } 1455 1456 static void acm_disconnect(struct usb_interface *intf) 1457 { 1458 struct acm *acm = usb_get_intfdata(intf); 1459 struct usb_device *usb_dev = interface_to_usbdev(intf); 1460 struct tty_struct *tty; 1461 int i; 1462 1463 dev_dbg(&intf->dev, "%s\n", __func__); 1464 1465 /* sibling interface is already cleaning up */ 1466 if (!acm) 1467 return; 1468 1469 mutex_lock(&acm->mutex); 1470 acm->disconnected = true; 1471 if (acm->country_codes) { 1472 device_remove_file(&acm->control->dev, 1473 &dev_attr_wCountryCodes); 1474 device_remove_file(&acm->control->dev, 1475 &dev_attr_iCountryCodeRelDate); 1476 } 1477 wake_up_all(&acm->wioctl); 1478 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1479 usb_set_intfdata(acm->control, NULL); 1480 usb_set_intfdata(acm->data, NULL); 1481 mutex_unlock(&acm->mutex); 1482 1483 tty = tty_port_tty_get(&acm->port); 1484 if (tty) { 1485 tty_vhangup(tty); 1486 tty_kref_put(tty); 1487 } 1488 1489 stop_data_traffic(acm); 1490 1491 tty_unregister_device(acm_tty_driver, acm->minor); 1492 1493 usb_free_urb(acm->ctrlurb); 1494 for (i = 0; i < ACM_NW; i++) 1495 usb_free_urb(acm->wb[i].urb); 1496 for (i = 0; i < acm->rx_buflimit; i++) 1497 usb_free_urb(acm->read_urbs[i]); 1498 acm_write_buffers_free(acm); 1499 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1500 acm_read_buffers_free(acm); 1501 1502 if (!acm->combined_interfaces) 1503 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1504 acm->data : acm->control); 1505 1506 tty_port_put(&acm->port); 1507 } 1508 1509 #ifdef CONFIG_PM 1510 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1511 { 1512 struct acm *acm = usb_get_intfdata(intf); 1513 int cnt; 1514 1515 if (PMSG_IS_AUTO(message)) { 1516 int b; 1517 1518 spin_lock_irq(&acm->write_lock); 1519 b = acm->transmitting; 1520 spin_unlock_irq(&acm->write_lock); 1521 if (b) 1522 return -EBUSY; 1523 } 1524 1525 spin_lock_irq(&acm->read_lock); 1526 spin_lock(&acm->write_lock); 1527 cnt = acm->susp_count++; 1528 spin_unlock(&acm->write_lock); 1529 spin_unlock_irq(&acm->read_lock); 1530 1531 if (cnt) 1532 return 0; 1533 1534 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) 1535 stop_data_traffic(acm); 1536 1537 return 0; 1538 } 1539 1540 static int acm_resume(struct usb_interface *intf) 1541 { 1542 struct acm *acm = usb_get_intfdata(intf); 1543 struct acm_wb *wb; 1544 int rv = 0; 1545 int cnt; 1546 1547 spin_lock_irq(&acm->read_lock); 1548 acm->susp_count -= 1; 1549 cnt = acm->susp_count; 1550 spin_unlock_irq(&acm->read_lock); 1551 1552 if (cnt) 1553 return 0; 1554 1555 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { 1556 rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); 1557 1558 spin_lock_irq(&acm->write_lock); 1559 if (acm->delayed_wb) { 1560 wb = acm->delayed_wb; 1561 acm->delayed_wb = NULL; 1562 spin_unlock_irq(&acm->write_lock); 1563 acm_start_wb(acm, wb); 1564 } else { 1565 spin_unlock_irq(&acm->write_lock); 1566 } 1567 1568 /* 1569 * delayed error checking because we must 1570 * do the write path at all cost 1571 */ 1572 if (rv < 0) 1573 goto err_out; 1574 1575 rv = acm_submit_read_urbs(acm, GFP_NOIO); 1576 } 1577 1578 err_out: 1579 return rv; 1580 } 1581 1582 static int acm_reset_resume(struct usb_interface *intf) 1583 { 1584 struct acm *acm = usb_get_intfdata(intf); 1585 1586 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) 1587 tty_port_tty_hangup(&acm->port, false); 1588 1589 return acm_resume(intf); 1590 } 1591 1592 #endif /* CONFIG_PM */ 1593 1594 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1595 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1596 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1597 USB_CDC_ACM_PROTO_VENDOR) 1598 1599 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1600 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1601 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1602 USB_CDC_ACM_PROTO_VENDOR) 1603 1604 /* 1605 * USB driver structure. 1606 */ 1607 1608 static const struct usb_device_id acm_ids[] = { 1609 /* quirky and broken devices */ 1610 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1611 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1612 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1613 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1614 }, 1615 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1616 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1617 }, 1618 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1619 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1620 }, 1621 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1622 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1623 }, 1624 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1625 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1626 }, 1627 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1628 .driver_info = SINGLE_RX_URB, 1629 }, 1630 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1631 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1632 }, 1633 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1634 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1635 }, 1636 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1637 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1638 }, 1639 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1640 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1641 }, 1642 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1643 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1644 }, 1645 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1646 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1647 }, 1648 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1649 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1650 }, 1651 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1652 }, 1653 /* Motorola H24 HSPA module: */ 1654 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1655 { USB_DEVICE(0x22b8, 0x2d92) }, /* modem + diagnostics */ 1656 { USB_DEVICE(0x22b8, 0x2d93) }, /* modem + AT port */ 1657 { USB_DEVICE(0x22b8, 0x2d95) }, /* modem + AT port + diagnostics */ 1658 { USB_DEVICE(0x22b8, 0x2d96) }, /* modem + NMEA */ 1659 { USB_DEVICE(0x22b8, 0x2d97) }, /* modem + diagnostics + NMEA */ 1660 { USB_DEVICE(0x22b8, 0x2d99) }, /* modem + AT port + NMEA */ 1661 { USB_DEVICE(0x22b8, 0x2d9a) }, /* modem + AT port + diagnostics + NMEA */ 1662 1663 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1664 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1665 data interface instead of 1666 communications interface. 1667 Maybe we should define a new 1668 quirk for this. */ 1669 }, 1670 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1671 .driver_info = NO_UNION_NORMAL, 1672 }, 1673 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1674 .driver_info = NO_UNION_NORMAL, 1675 }, 1676 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1677 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1678 }, 1679 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1680 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1681 }, 1682 1683 /* Nokia S60 phones expose two ACM channels. The first is 1684 * a modem and is picked up by the standard AT-command 1685 * information below. The second is 'vendor-specific' but 1686 * is treated as a serial device at the S60 end, so we want 1687 * to expose it on Linux too. */ 1688 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1689 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1690 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1691 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1692 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1693 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1694 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1695 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1696 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1697 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1698 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1699 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1700 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1701 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1702 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1703 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1704 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1705 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1706 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1707 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1708 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1709 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1710 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1711 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1712 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1713 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1714 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1715 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1716 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1717 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1718 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1719 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1720 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1721 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1722 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1723 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1724 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1725 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1726 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1727 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1728 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1729 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1730 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1731 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1732 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1733 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1734 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1735 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1736 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1737 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1738 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1739 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1740 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1741 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1742 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1743 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1744 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1745 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1746 1747 /* Support for Owen devices */ 1748 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1749 1750 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1751 1752 /* Support Lego NXT using pbLua firmware */ 1753 { USB_DEVICE(0x0694, 0xff00), 1754 .driver_info = NOT_A_MODEM, 1755 }, 1756 1757 /* Support for Droids MuIn LCD */ 1758 { USB_DEVICE(0x04d8, 0x000b), 1759 .driver_info = NO_DATA_INTERFACE, 1760 }, 1761 1762 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1763 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1764 .driver_info = IGNORE_DEVICE, 1765 }, 1766 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1767 .driver_info = IGNORE_DEVICE, 1768 }, 1769 #endif 1770 1771 /* control interfaces without any protocol set */ 1772 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1773 USB_CDC_PROTO_NONE) }, 1774 1775 /* control interfaces with various AT-command sets */ 1776 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1777 USB_CDC_ACM_PROTO_AT_V25TER) }, 1778 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1779 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1780 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1781 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1782 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1783 USB_CDC_ACM_PROTO_AT_GSM) }, 1784 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1785 USB_CDC_ACM_PROTO_AT_3G) }, 1786 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1787 USB_CDC_ACM_PROTO_AT_CDMA) }, 1788 1789 { } 1790 }; 1791 1792 MODULE_DEVICE_TABLE(usb, acm_ids); 1793 1794 static struct usb_driver acm_driver = { 1795 .name = "cdc_acm", 1796 .probe = acm_probe, 1797 .disconnect = acm_disconnect, 1798 #ifdef CONFIG_PM 1799 .suspend = acm_suspend, 1800 .resume = acm_resume, 1801 .reset_resume = acm_reset_resume, 1802 #endif 1803 .id_table = acm_ids, 1804 #ifdef CONFIG_PM 1805 .supports_autosuspend = 1, 1806 #endif 1807 .disable_hub_initiated_lpm = 1, 1808 }; 1809 1810 /* 1811 * TTY driver structures. 1812 */ 1813 1814 static const struct tty_operations acm_ops = { 1815 .install = acm_tty_install, 1816 .open = acm_tty_open, 1817 .close = acm_tty_close, 1818 .cleanup = acm_tty_cleanup, 1819 .hangup = acm_tty_hangup, 1820 .write = acm_tty_write, 1821 .write_room = acm_tty_write_room, 1822 .ioctl = acm_tty_ioctl, 1823 .throttle = acm_tty_throttle, 1824 .unthrottle = acm_tty_unthrottle, 1825 .chars_in_buffer = acm_tty_chars_in_buffer, 1826 .break_ctl = acm_tty_break_ctl, 1827 .set_termios = acm_tty_set_termios, 1828 .tiocmget = acm_tty_tiocmget, 1829 .tiocmset = acm_tty_tiocmset, 1830 }; 1831 1832 /* 1833 * Init / exit. 1834 */ 1835 1836 static int __init acm_init(void) 1837 { 1838 int retval; 1839 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1840 if (!acm_tty_driver) 1841 return -ENOMEM; 1842 acm_tty_driver->driver_name = "acm", 1843 acm_tty_driver->name = "ttyACM", 1844 acm_tty_driver->major = ACM_TTY_MAJOR, 1845 acm_tty_driver->minor_start = 0, 1846 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1847 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1848 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1849 acm_tty_driver->init_termios = tty_std_termios; 1850 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1851 HUPCL | CLOCAL; 1852 tty_set_operations(acm_tty_driver, &acm_ops); 1853 1854 retval = tty_register_driver(acm_tty_driver); 1855 if (retval) { 1856 put_tty_driver(acm_tty_driver); 1857 return retval; 1858 } 1859 1860 retval = usb_register(&acm_driver); 1861 if (retval) { 1862 tty_unregister_driver(acm_tty_driver); 1863 put_tty_driver(acm_tty_driver); 1864 return retval; 1865 } 1866 1867 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1868 1869 return 0; 1870 } 1871 1872 static void __exit acm_exit(void) 1873 { 1874 usb_deregister(&acm_driver); 1875 tty_unregister_driver(acm_tty_driver); 1876 put_tty_driver(acm_tty_driver); 1877 } 1878 1879 module_init(acm_init); 1880 module_exit(acm_exit); 1881 1882 MODULE_AUTHOR(DRIVER_AUTHOR); 1883 MODULE_DESCRIPTION(DRIVER_DESC); 1884 MODULE_LICENSE("GPL"); 1885 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 1886