cdc-acm.c revision e4c36076c2a6195ec62c35b03c3fde84d0087dc8
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 57static struct usb_driver acm_driver; 58static struct tty_driver *acm_tty_driver; 59static struct acm *acm_table[ACM_TTY_MINORS]; 60 61static 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 */ 71static 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 */ 94static 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'. */ 111static 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 122static int acm_ctrl_msg(struct acm *acm, int request, int value, 123 void *buf, int len) 124{ 125 int retval; 126 127 retval = usb_autopm_get_interface(acm->control); 128 if (retval) 129 return retval; 130 131 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 132 request, USB_RT_ACM, value, 133 acm->control->altsetting[0].desc.bInterfaceNumber, 134 buf, len, 5000); 135 136 dev_dbg(&acm->control->dev, 137 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 138 __func__, request, value, len, retval); 139 140 usb_autopm_put_interface(acm->control); 141 142 return retval < 0 ? retval : 0; 143} 144 145/* devices aren't required to support these requests. 146 * the cdc acm descriptor tells whether they do... 147 */ 148#define acm_set_control(acm, control) \ 149 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) 150#define acm_set_line(acm, line) \ 151 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 152#define acm_send_break(acm, ms) \ 153 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 154 155/* 156 * Write buffer management. 157 * All of these assume proper locks taken by the caller. 158 */ 159 160static int acm_wb_alloc(struct acm *acm) 161{ 162 int i, wbn; 163 struct acm_wb *wb; 164 165 wbn = 0; 166 i = 0; 167 for (;;) { 168 wb = &acm->wb[wbn]; 169 if (!wb->use) { 170 wb->use = 1; 171 return wbn; 172 } 173 wbn = (wbn + 1) % ACM_NW; 174 if (++i >= ACM_NW) 175 return -1; 176 } 177} 178 179static int acm_wb_is_avail(struct acm *acm) 180{ 181 int i, n; 182 unsigned long flags; 183 184 n = ACM_NW; 185 spin_lock_irqsave(&acm->write_lock, flags); 186 for (i = 0; i < ACM_NW; i++) 187 n -= acm->wb[i].use; 188 spin_unlock_irqrestore(&acm->write_lock, flags); 189 return n; 190} 191 192/* 193 * Finish write. Caller must hold acm->write_lock 194 */ 195static void acm_write_done(struct acm *acm, struct acm_wb *wb) 196{ 197 wb->use = 0; 198 acm->transmitting--; 199 usb_autopm_put_interface_async(acm->control); 200} 201 202/* 203 * Poke write. 204 * 205 * the caller is responsible for locking 206 */ 207 208static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 209{ 210 int rc; 211 212 acm->transmitting++; 213 214 wb->urb->transfer_buffer = wb->buf; 215 wb->urb->transfer_dma = wb->dmah; 216 wb->urb->transfer_buffer_length = wb->len; 217 wb->urb->dev = acm->dev; 218 219 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 220 if (rc < 0) { 221 dev_err(&acm->data->dev, 222 "%s - usb_submit_urb(write bulk) failed: %d\n", 223 __func__, rc); 224 acm_write_done(acm, wb); 225 } 226 return rc; 227} 228 229/* 230 * attributes exported through sysfs 231 */ 232static ssize_t show_caps 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 return sprintf(buf, "%d", acm->ctrl_caps); 239} 240static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); 241 242static ssize_t show_country_codes 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 memcpy(buf, acm->country_codes, acm->country_code_size); 249 return acm->country_code_size; 250} 251 252static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); 253 254static ssize_t show_country_rel_date 255(struct device *dev, struct device_attribute *attr, char *buf) 256{ 257 struct usb_interface *intf = to_usb_interface(dev); 258 struct acm *acm = usb_get_intfdata(intf); 259 260 return sprintf(buf, "%d", acm->country_rel_date); 261} 262 263static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); 264/* 265 * Interrupt handlers for various ACM device responses 266 */ 267 268/* control interface reports status changes with "interrupt" transfers */ 269static void acm_ctrl_irq(struct urb *urb) 270{ 271 struct acm *acm = urb->context; 272 struct usb_cdc_notification *dr = urb->transfer_buffer; 273 unsigned char *data; 274 int newctrl; 275 int difference; 276 int retval; 277 int status = urb->status; 278 279 switch (status) { 280 case 0: 281 /* success */ 282 break; 283 case -ECONNRESET: 284 case -ENOENT: 285 case -ESHUTDOWN: 286 /* this urb is terminated, clean up */ 287 dev_dbg(&acm->control->dev, 288 "%s - urb shutting down with status: %d\n", 289 __func__, status); 290 return; 291 default: 292 dev_dbg(&acm->control->dev, 293 "%s - nonzero urb status received: %d\n", 294 __func__, status); 295 goto exit; 296 } 297 298 usb_mark_last_busy(acm->dev); 299 300 data = (unsigned char *)(dr + 1); 301 switch (dr->bNotificationType) { 302 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 303 dev_dbg(&acm->control->dev, "%s - network connection: %d\n", 304 __func__, dr->wValue); 305 break; 306 307 case USB_CDC_NOTIFY_SERIAL_STATE: 308 newctrl = get_unaligned_le16(data); 309 310 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 311 dev_dbg(&acm->control->dev, "%s - calling hangup\n", 312 __func__); 313 tty_port_tty_hangup(&acm->port, false); 314 } 315 316 difference = acm->ctrlin ^ newctrl; 317 spin_lock(&acm->read_lock); 318 acm->ctrlin = newctrl; 319 acm->oldcount = acm->iocount; 320 321 if (difference & ACM_CTRL_DSR) 322 acm->iocount.dsr++; 323 if (difference & ACM_CTRL_BRK) 324 acm->iocount.brk++; 325 if (difference & ACM_CTRL_RI) 326 acm->iocount.rng++; 327 if (difference & ACM_CTRL_DCD) 328 acm->iocount.dcd++; 329 if (difference & ACM_CTRL_FRAMING) 330 acm->iocount.frame++; 331 if (difference & ACM_CTRL_PARITY) 332 acm->iocount.parity++; 333 if (difference & ACM_CTRL_OVERRUN) 334 acm->iocount.overrun++; 335 spin_unlock(&acm->read_lock); 336 337 if (difference) 338 wake_up_all(&acm->wioctl); 339 340 break; 341 342 default: 343 dev_dbg(&acm->control->dev, 344 "%s - unknown notification %d received: index %d " 345 "len %d data0 %d data1 %d\n", 346 __func__, 347 dr->bNotificationType, dr->wIndex, 348 dr->wLength, data[0], data[1]); 349 break; 350 } 351exit: 352 retval = usb_submit_urb(urb, GFP_ATOMIC); 353 if (retval) 354 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", 355 __func__, retval); 356} 357 358static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 359{ 360 int res; 361 362 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 363 return 0; 364 365 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index); 366 367 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 368 if (res) { 369 if (res != -EPERM) { 370 dev_err(&acm->data->dev, 371 "%s - usb_submit_urb failed: %d\n", 372 __func__, res); 373 } 374 set_bit(index, &acm->read_urbs_free); 375 return res; 376 } 377 378 return 0; 379} 380 381static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 382{ 383 int res; 384 int i; 385 386 for (i = 0; i < acm->rx_buflimit; ++i) { 387 res = acm_submit_read_urb(acm, i, mem_flags); 388 if (res) 389 return res; 390 } 391 392 return 0; 393} 394 395static void acm_process_read_urb(struct acm *acm, struct urb *urb) 396{ 397 if (!urb->actual_length) 398 return; 399 400 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 401 urb->actual_length); 402 tty_flip_buffer_push(&acm->port); 403} 404 405static void acm_read_bulk_callback(struct urb *urb) 406{ 407 struct acm_rb *rb = urb->context; 408 struct acm *acm = rb->instance; 409 unsigned long flags; 410 411 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__, 412 rb->index, urb->actual_length); 413 set_bit(rb->index, &acm->read_urbs_free); 414 415 if (!acm->dev) { 416 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 417 return; 418 } 419 usb_mark_last_busy(acm->dev); 420 421 if (urb->status) { 422 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n", 423 __func__, urb->status); 424 return; 425 } 426 acm_process_read_urb(acm, urb); 427 428 /* throttle device if requested by tty */ 429 spin_lock_irqsave(&acm->read_lock, flags); 430 acm->throttled = acm->throttle_req; 431 if (!acm->throttled && !acm->susp_count) { 432 spin_unlock_irqrestore(&acm->read_lock, flags); 433 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 434 } else { 435 spin_unlock_irqrestore(&acm->read_lock, flags); 436 } 437} 438 439/* data interface wrote those outgoing bytes */ 440static void acm_write_bulk(struct urb *urb) 441{ 442 struct acm_wb *wb = urb->context; 443 struct acm *acm = wb->instance; 444 unsigned long flags; 445 446 if (urb->status || (urb->actual_length != urb->transfer_buffer_length)) 447 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n", 448 __func__, 449 urb->actual_length, 450 urb->transfer_buffer_length, 451 urb->status); 452 453 spin_lock_irqsave(&acm->write_lock, flags); 454 acm_write_done(acm, wb); 455 spin_unlock_irqrestore(&acm->write_lock, flags); 456 schedule_work(&acm->work); 457} 458 459static void acm_softint(struct work_struct *work) 460{ 461 struct acm *acm = container_of(work, struct acm, work); 462 463 dev_vdbg(&acm->data->dev, "%s\n", __func__); 464 465 tty_port_tty_wakeup(&acm->port); 466} 467 468/* 469 * TTY handlers 470 */ 471 472static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 473{ 474 struct acm *acm; 475 int retval; 476 477 dev_dbg(tty->dev, "%s\n", __func__); 478 479 acm = acm_get_by_index(tty->index); 480 if (!acm) 481 return -ENODEV; 482 483 retval = tty_standard_install(driver, tty); 484 if (retval) 485 goto error_init_termios; 486 487 tty->driver_data = acm; 488 489 return 0; 490 491error_init_termios: 492 tty_port_put(&acm->port); 493 return retval; 494} 495 496static int acm_tty_open(struct tty_struct *tty, struct file *filp) 497{ 498 struct acm *acm = tty->driver_data; 499 500 dev_dbg(tty->dev, "%s\n", __func__); 501 502 return tty_port_open(&acm->port, tty, filp); 503} 504 505static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 506{ 507 struct acm *acm = container_of(port, struct acm, port); 508 int retval = -ENODEV; 509 int i; 510 511 dev_dbg(&acm->control->dev, "%s\n", __func__); 512 513 mutex_lock(&acm->mutex); 514 if (acm->disconnected) 515 goto disconnected; 516 517 retval = usb_autopm_get_interface(acm->control); 518 if (retval) 519 goto error_get_interface; 520 521 /* 522 * FIXME: Why do we need this? Allocating 64K of physically contiguous 523 * memory is really nasty... 524 */ 525 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 526 acm->control->needs_remote_wakeup = 1; 527 528 acm->ctrlurb->dev = acm->dev; 529 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 530 if (retval) { 531 dev_err(&acm->control->dev, 532 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 533 goto error_submit_urb; 534 } 535 536 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS; 537 retval = acm_set_control(acm, acm->ctrlout); 538 if (retval < 0 && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 539 goto error_set_control; 540 541 /* 542 * Unthrottle device in case the TTY was closed while throttled. 543 */ 544 spin_lock_irq(&acm->read_lock); 545 acm->throttled = 0; 546 acm->throttle_req = 0; 547 spin_unlock_irq(&acm->read_lock); 548 549 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 550 if (retval) 551 goto error_submit_read_urbs; 552 553 usb_autopm_put_interface(acm->control); 554 555 mutex_unlock(&acm->mutex); 556 557 return 0; 558 559error_submit_read_urbs: 560 for (i = 0; i < acm->rx_buflimit; i++) 561 usb_kill_urb(acm->read_urbs[i]); 562 acm->ctrlout = 0; 563 acm_set_control(acm, acm->ctrlout); 564error_set_control: 565 usb_kill_urb(acm->ctrlurb); 566error_submit_urb: 567 usb_autopm_put_interface(acm->control); 568error_get_interface: 569disconnected: 570 mutex_unlock(&acm->mutex); 571 572 return usb_translate_errors(retval); 573} 574 575static void acm_port_destruct(struct tty_port *port) 576{ 577 struct acm *acm = container_of(port, struct acm, port); 578 579 dev_dbg(&acm->control->dev, "%s\n", __func__); 580 581 acm_release_minor(acm); 582 usb_put_intf(acm->control); 583 kfree(acm->country_codes); 584 kfree(acm); 585} 586 587static void acm_port_shutdown(struct tty_port *port) 588{ 589 struct acm *acm = container_of(port, struct acm, port); 590 struct urb *urb; 591 struct acm_wb *wb; 592 int i; 593 594 dev_dbg(&acm->control->dev, "%s\n", __func__); 595 596 mutex_lock(&acm->mutex); 597 if (!acm->disconnected) { 598 usb_autopm_get_interface(acm->control); 599 acm_set_control(acm, acm->ctrlout = 0); 600 601 for (;;) { 602 urb = usb_get_from_anchor(&acm->delayed); 603 if (!urb) 604 break; 605 wb = urb->context; 606 wb->use = 0; 607 usb_autopm_put_interface_async(acm->control); 608 } 609 610 usb_kill_urb(acm->ctrlurb); 611 for (i = 0; i < ACM_NW; i++) 612 usb_kill_urb(acm->wb[i].urb); 613 for (i = 0; i < acm->rx_buflimit; i++) 614 usb_kill_urb(acm->read_urbs[i]); 615 acm->control->needs_remote_wakeup = 0; 616 usb_autopm_put_interface(acm->control); 617 } 618 mutex_unlock(&acm->mutex); 619} 620 621static void acm_tty_cleanup(struct tty_struct *tty) 622{ 623 struct acm *acm = tty->driver_data; 624 dev_dbg(&acm->control->dev, "%s\n", __func__); 625 tty_port_put(&acm->port); 626} 627 628static void acm_tty_hangup(struct tty_struct *tty) 629{ 630 struct acm *acm = tty->driver_data; 631 dev_dbg(&acm->control->dev, "%s\n", __func__); 632 tty_port_hangup(&acm->port); 633} 634 635static void acm_tty_close(struct tty_struct *tty, struct file *filp) 636{ 637 struct acm *acm = tty->driver_data; 638 dev_dbg(&acm->control->dev, "%s\n", __func__); 639 tty_port_close(&acm->port, tty, filp); 640} 641 642static int acm_tty_write(struct tty_struct *tty, 643 const unsigned char *buf, int count) 644{ 645 struct acm *acm = tty->driver_data; 646 int stat; 647 unsigned long flags; 648 int wbn; 649 struct acm_wb *wb; 650 651 if (!count) 652 return 0; 653 654 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count); 655 656 spin_lock_irqsave(&acm->write_lock, flags); 657 wbn = acm_wb_alloc(acm); 658 if (wbn < 0) { 659 spin_unlock_irqrestore(&acm->write_lock, flags); 660 return 0; 661 } 662 wb = &acm->wb[wbn]; 663 664 if (!acm->dev) { 665 wb->use = 0; 666 spin_unlock_irqrestore(&acm->write_lock, flags); 667 return -ENODEV; 668 } 669 670 count = (count > acm->writesize) ? acm->writesize : count; 671 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count); 672 memcpy(wb->buf, buf, count); 673 wb->len = count; 674 675 stat = usb_autopm_get_interface_async(acm->control); 676 if (stat) { 677 wb->use = 0; 678 spin_unlock_irqrestore(&acm->write_lock, flags); 679 return stat; 680 } 681 682 if (acm->susp_count) { 683 usb_anchor_urb(wb->urb, &acm->delayed); 684 spin_unlock_irqrestore(&acm->write_lock, flags); 685 return count; 686 } 687 usb_mark_last_busy(acm->dev); 688 689 stat = acm_start_wb(acm, wb); 690 spin_unlock_irqrestore(&acm->write_lock, flags); 691 692 if (stat < 0) 693 return stat; 694 return count; 695} 696 697static int acm_tty_write_room(struct tty_struct *tty) 698{ 699 struct acm *acm = tty->driver_data; 700 /* 701 * Do not let the line discipline to know that we have a reserve, 702 * or it might get too enthusiastic. 703 */ 704 return acm_wb_is_avail(acm) ? acm->writesize : 0; 705} 706 707static int acm_tty_chars_in_buffer(struct tty_struct *tty) 708{ 709 struct acm *acm = tty->driver_data; 710 /* 711 * if the device was unplugged then any remaining characters fell out 712 * of the connector ;) 713 */ 714 if (acm->disconnected) 715 return 0; 716 /* 717 * This is inaccurate (overcounts), but it works. 718 */ 719 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 720} 721 722static void acm_tty_throttle(struct tty_struct *tty) 723{ 724 struct acm *acm = tty->driver_data; 725 726 spin_lock_irq(&acm->read_lock); 727 acm->throttle_req = 1; 728 spin_unlock_irq(&acm->read_lock); 729} 730 731static void acm_tty_unthrottle(struct tty_struct *tty) 732{ 733 struct acm *acm = tty->driver_data; 734 unsigned int was_throttled; 735 736 spin_lock_irq(&acm->read_lock); 737 was_throttled = acm->throttled; 738 acm->throttled = 0; 739 acm->throttle_req = 0; 740 spin_unlock_irq(&acm->read_lock); 741 742 if (was_throttled) 743 acm_submit_read_urbs(acm, GFP_KERNEL); 744} 745 746static int acm_tty_break_ctl(struct tty_struct *tty, int state) 747{ 748 struct acm *acm = tty->driver_data; 749 int retval; 750 751 retval = acm_send_break(acm, state ? 0xffff : 0); 752 if (retval < 0) 753 dev_dbg(&acm->control->dev, "%s - send break failed\n", 754 __func__); 755 return retval; 756} 757 758static int acm_tty_tiocmget(struct tty_struct *tty) 759{ 760 struct acm *acm = tty->driver_data; 761 762 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 763 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 764 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 765 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 766 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 767 TIOCM_CTS; 768} 769 770static int acm_tty_tiocmset(struct tty_struct *tty, 771 unsigned int set, unsigned int clear) 772{ 773 struct acm *acm = tty->driver_data; 774 unsigned int newctrl; 775 776 newctrl = acm->ctrlout; 777 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 778 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 779 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 780 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 781 782 newctrl = (newctrl & ~clear) | set; 783 784 if (acm->ctrlout == newctrl) 785 return 0; 786 return acm_set_control(acm, acm->ctrlout = newctrl); 787} 788 789static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 790{ 791 struct serial_struct tmp; 792 793 if (!info) 794 return -EINVAL; 795 796 memset(&tmp, 0, sizeof(tmp)); 797 tmp.flags = ASYNC_LOW_LATENCY; 798 tmp.xmit_fifo_size = acm->writesize; 799 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 800 tmp.close_delay = acm->port.close_delay / 10; 801 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 802 ASYNC_CLOSING_WAIT_NONE : 803 acm->port.closing_wait / 10; 804 805 if (copy_to_user(info, &tmp, sizeof(tmp))) 806 return -EFAULT; 807 else 808 return 0; 809} 810 811static int set_serial_info(struct acm *acm, 812 struct serial_struct __user *newinfo) 813{ 814 struct serial_struct new_serial; 815 unsigned int closing_wait, close_delay; 816 int retval = 0; 817 818 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 819 return -EFAULT; 820 821 close_delay = new_serial.close_delay * 10; 822 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 823 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 824 825 mutex_lock(&acm->port.mutex); 826 827 if (!capable(CAP_SYS_ADMIN)) { 828 if ((close_delay != acm->port.close_delay) || 829 (closing_wait != acm->port.closing_wait)) 830 retval = -EPERM; 831 else 832 retval = -EOPNOTSUPP; 833 } else { 834 acm->port.close_delay = close_delay; 835 acm->port.closing_wait = closing_wait; 836 } 837 838 mutex_unlock(&acm->port.mutex); 839 return retval; 840} 841 842static int wait_serial_change(struct acm *acm, unsigned long arg) 843{ 844 int rv = 0; 845 DECLARE_WAITQUEUE(wait, current); 846 struct async_icount old, new; 847 848 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD )) 849 return -EINVAL; 850 do { 851 spin_lock_irq(&acm->read_lock); 852 old = acm->oldcount; 853 new = acm->iocount; 854 acm->oldcount = new; 855 spin_unlock_irq(&acm->read_lock); 856 857 if ((arg & TIOCM_DSR) && 858 old.dsr != new.dsr) 859 break; 860 if ((arg & TIOCM_CD) && 861 old.dcd != new.dcd) 862 break; 863 if ((arg & TIOCM_RI) && 864 old.rng != new.rng) 865 break; 866 867 add_wait_queue(&acm->wioctl, &wait); 868 set_current_state(TASK_INTERRUPTIBLE); 869 schedule(); 870 remove_wait_queue(&acm->wioctl, &wait); 871 if (acm->disconnected) { 872 if (arg & TIOCM_CD) 873 break; 874 else 875 rv = -ENODEV; 876 } else { 877 if (signal_pending(current)) 878 rv = -ERESTARTSYS; 879 } 880 } while (!rv); 881 882 883 884 return rv; 885} 886 887static int get_serial_usage(struct acm *acm, 888 struct serial_icounter_struct __user *count) 889{ 890 struct serial_icounter_struct icount; 891 int rv = 0; 892 893 memset(&icount, 0, sizeof(icount)); 894 icount.dsr = acm->iocount.dsr; 895 icount.rng = acm->iocount.rng; 896 icount.dcd = acm->iocount.dcd; 897 icount.frame = acm->iocount.frame; 898 icount.overrun = acm->iocount.overrun; 899 icount.parity = acm->iocount.parity; 900 icount.brk = acm->iocount.brk; 901 902 if (copy_to_user(count, &icount, sizeof(icount)) > 0) 903 rv = -EFAULT; 904 905 return rv; 906} 907 908static int acm_tty_ioctl(struct tty_struct *tty, 909 unsigned int cmd, unsigned long arg) 910{ 911 struct acm *acm = tty->driver_data; 912 int rv = -ENOIOCTLCMD; 913 914 switch (cmd) { 915 case TIOCGSERIAL: /* gets serial port data */ 916 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 917 break; 918 case TIOCSSERIAL: 919 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 920 break; 921 case TIOCMIWAIT: 922 rv = usb_autopm_get_interface(acm->control); 923 if (rv < 0) { 924 rv = -EIO; 925 break; 926 } 927 rv = wait_serial_change(acm, arg); 928 usb_autopm_put_interface(acm->control); 929 break; 930 case TIOCGICOUNT: 931 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg); 932 break; 933 } 934 935 return rv; 936} 937 938static void acm_tty_set_termios(struct tty_struct *tty, 939 struct ktermios *termios_old) 940{ 941 struct acm *acm = tty->driver_data; 942 struct ktermios *termios = &tty->termios; 943 struct usb_cdc_line_coding newline; 944 int newctrl = acm->ctrlout; 945 946 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 947 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 948 newline.bParityType = termios->c_cflag & PARENB ? 949 (termios->c_cflag & PARODD ? 1 : 2) + 950 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 951 switch (termios->c_cflag & CSIZE) { 952 case CS5: 953 newline.bDataBits = 5; 954 break; 955 case CS6: 956 newline.bDataBits = 6; 957 break; 958 case CS7: 959 newline.bDataBits = 7; 960 break; 961 case CS8: 962 default: 963 newline.bDataBits = 8; 964 break; 965 } 966 /* FIXME: Needs to clear unsupported bits in the termios */ 967 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 968 969 if (!newline.dwDTERate) { 970 newline.dwDTERate = acm->line.dwDTERate; 971 newctrl &= ~ACM_CTRL_DTR; 972 } else 973 newctrl |= ACM_CTRL_DTR; 974 975 if (newctrl != acm->ctrlout) 976 acm_set_control(acm, acm->ctrlout = newctrl); 977 978 if (memcmp(&acm->line, &newline, sizeof newline)) { 979 memcpy(&acm->line, &newline, sizeof newline); 980 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 981 __func__, 982 le32_to_cpu(newline.dwDTERate), 983 newline.bCharFormat, newline.bParityType, 984 newline.bDataBits); 985 acm_set_line(acm, &acm->line); 986 } 987} 988 989static const struct tty_port_operations acm_port_ops = { 990 .shutdown = acm_port_shutdown, 991 .activate = acm_port_activate, 992 .destruct = acm_port_destruct, 993}; 994 995/* 996 * USB probe and disconnect routines. 997 */ 998 999/* Little helpers: write/read buffers free */ 1000static void acm_write_buffers_free(struct acm *acm) 1001{ 1002 int i; 1003 struct acm_wb *wb; 1004 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1005 1006 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1007 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); 1008} 1009 1010static void acm_read_buffers_free(struct acm *acm) 1011{ 1012 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1013 int i; 1014 1015 for (i = 0; i < acm->rx_buflimit; i++) 1016 usb_free_coherent(usb_dev, acm->readsize, 1017 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1018} 1019 1020/* Little helper: write buffers allocate */ 1021static int acm_write_buffers_alloc(struct acm *acm) 1022{ 1023 int i; 1024 struct acm_wb *wb; 1025 1026 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1027 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1028 &wb->dmah); 1029 if (!wb->buf) { 1030 while (i != 0) { 1031 --i; 1032 --wb; 1033 usb_free_coherent(acm->dev, acm->writesize, 1034 wb->buf, wb->dmah); 1035 } 1036 return -ENOMEM; 1037 } 1038 } 1039 return 0; 1040} 1041 1042static int acm_probe(struct usb_interface *intf, 1043 const struct usb_device_id *id) 1044{ 1045 struct usb_cdc_union_desc *union_header = NULL; 1046 struct usb_cdc_country_functional_desc *cfd = NULL; 1047 unsigned char *buffer = intf->altsetting->extra; 1048 int buflen = intf->altsetting->extralen; 1049 struct usb_interface *control_interface; 1050 struct usb_interface *data_interface; 1051 struct usb_endpoint_descriptor *epctrl = NULL; 1052 struct usb_endpoint_descriptor *epread = NULL; 1053 struct usb_endpoint_descriptor *epwrite = NULL; 1054 struct usb_device *usb_dev = interface_to_usbdev(intf); 1055 struct acm *acm; 1056 int minor; 1057 int ctrlsize, readsize; 1058 u8 *buf; 1059 u8 ac_management_function = 0; 1060 u8 call_management_function = 0; 1061 int call_interface_num = -1; 1062 int data_interface_num = -1; 1063 unsigned long quirks; 1064 int num_rx_buf; 1065 int i; 1066 int combined_interfaces = 0; 1067 struct device *tty_dev; 1068 int rv = -ENOMEM; 1069 1070 /* normal quirks */ 1071 quirks = (unsigned long)id->driver_info; 1072 1073 if (quirks == IGNORE_DEVICE) 1074 return -ENODEV; 1075 1076 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1077 1078 /* handle quirks deadly to normal probing*/ 1079 if (quirks == NO_UNION_NORMAL) { 1080 data_interface = usb_ifnum_to_if(usb_dev, 1); 1081 control_interface = usb_ifnum_to_if(usb_dev, 0); 1082 goto skip_normal_probe; 1083 } 1084 1085 /* normal probing*/ 1086 if (!buffer) { 1087 dev_err(&intf->dev, "Weird descriptor references\n"); 1088 return -EINVAL; 1089 } 1090 1091 if (!buflen) { 1092 if (intf->cur_altsetting->endpoint && 1093 intf->cur_altsetting->endpoint->extralen && 1094 intf->cur_altsetting->endpoint->extra) { 1095 dev_dbg(&intf->dev, 1096 "Seeking extra descriptors on endpoint\n"); 1097 buflen = intf->cur_altsetting->endpoint->extralen; 1098 buffer = intf->cur_altsetting->endpoint->extra; 1099 } else { 1100 dev_err(&intf->dev, 1101 "Zero length descriptor references\n"); 1102 return -EINVAL; 1103 } 1104 } 1105 1106 while (buflen > 0) { 1107 if (buffer[1] != USB_DT_CS_INTERFACE) { 1108 dev_err(&intf->dev, "skipping garbage\n"); 1109 goto next_desc; 1110 } 1111 1112 switch (buffer[2]) { 1113 case USB_CDC_UNION_TYPE: /* we've found it */ 1114 if (union_header) { 1115 dev_err(&intf->dev, "More than one " 1116 "union descriptor, skipping ...\n"); 1117 goto next_desc; 1118 } 1119 union_header = (struct usb_cdc_union_desc *)buffer; 1120 break; 1121 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ 1122 cfd = (struct usb_cdc_country_functional_desc *)buffer; 1123 break; 1124 case USB_CDC_HEADER_TYPE: /* maybe check version */ 1125 break; /* for now we ignore it */ 1126 case USB_CDC_ACM_TYPE: 1127 ac_management_function = buffer[3]; 1128 break; 1129 case USB_CDC_CALL_MANAGEMENT_TYPE: 1130 call_management_function = buffer[3]; 1131 call_interface_num = buffer[4]; 1132 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3) 1133 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); 1134 break; 1135 default: 1136 /* there are LOTS more CDC descriptors that 1137 * could legitimately be found here. 1138 */ 1139 dev_dbg(&intf->dev, "Ignoring descriptor: " 1140 "type %02x, length %d\n", 1141 buffer[2], buffer[0]); 1142 break; 1143 } 1144next_desc: 1145 buflen -= buffer[0]; 1146 buffer += buffer[0]; 1147 } 1148 1149 if (!union_header) { 1150 if (call_interface_num > 0) { 1151 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1152 /* quirks for Droids MuIn LCD */ 1153 if (quirks & NO_DATA_INTERFACE) 1154 data_interface = usb_ifnum_to_if(usb_dev, 0); 1155 else 1156 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); 1157 control_interface = intf; 1158 } else { 1159 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1160 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1161 return -ENODEV; 1162 } else { 1163 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1164 combined_interfaces = 1; 1165 control_interface = data_interface = intf; 1166 goto look_for_collapsed_interface; 1167 } 1168 } 1169 } else { 1170 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1171 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); 1172 if (!control_interface || !data_interface) { 1173 dev_dbg(&intf->dev, "no interfaces\n"); 1174 return -ENODEV; 1175 } 1176 } 1177 1178 if (data_interface_num != call_interface_num) 1179 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1180 1181 if (control_interface == data_interface) { 1182 /* some broken devices designed for windows work this way */ 1183 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1184 combined_interfaces = 1; 1185 /* a popular other OS doesn't use it */ 1186 quirks |= NO_CAP_LINE; 1187 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1188 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1189 return -EINVAL; 1190 } 1191look_for_collapsed_interface: 1192 for (i = 0; i < 3; i++) { 1193 struct usb_endpoint_descriptor *ep; 1194 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1195 1196 if (usb_endpoint_is_int_in(ep)) 1197 epctrl = ep; 1198 else if (usb_endpoint_is_bulk_out(ep)) 1199 epwrite = ep; 1200 else if (usb_endpoint_is_bulk_in(ep)) 1201 epread = ep; 1202 else 1203 return -EINVAL; 1204 } 1205 if (!epctrl || !epread || !epwrite) 1206 return -ENODEV; 1207 else 1208 goto made_compressed_probe; 1209 } 1210 1211skip_normal_probe: 1212 1213 /*workaround for switched interfaces */ 1214 if (data_interface->cur_altsetting->desc.bInterfaceClass 1215 != CDC_DATA_INTERFACE_TYPE) { 1216 if (control_interface->cur_altsetting->desc.bInterfaceClass 1217 == CDC_DATA_INTERFACE_TYPE) { 1218 struct usb_interface *t; 1219 dev_dbg(&intf->dev, 1220 "Your device has switched interfaces.\n"); 1221 t = control_interface; 1222 control_interface = data_interface; 1223 data_interface = t; 1224 } else { 1225 return -EINVAL; 1226 } 1227 } 1228 1229 /* Accept probe requests only for the control interface */ 1230 if (!combined_interfaces && intf != control_interface) 1231 return -ENODEV; 1232 1233 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1234 /* valid in this context */ 1235 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1236 return -EBUSY; 1237 } 1238 1239 1240 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1241 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1242 return -EINVAL; 1243 1244 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1245 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1246 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1247 1248 1249 /* workaround for switched endpoints */ 1250 if (!usb_endpoint_dir_in(epread)) { 1251 /* descriptors are swapped */ 1252 struct usb_endpoint_descriptor *t; 1253 dev_dbg(&intf->dev, 1254 "The data interface has switched endpoints\n"); 1255 t = epread; 1256 epread = epwrite; 1257 epwrite = t; 1258 } 1259made_compressed_probe: 1260 dev_dbg(&intf->dev, "interfaces are valid\n"); 1261 1262 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1263 if (acm == NULL) { 1264 dev_err(&intf->dev, "out of memory (acm kzalloc)\n"); 1265 goto alloc_fail; 1266 } 1267 1268 minor = acm_alloc_minor(acm); 1269 if (minor == ACM_TTY_MINORS) { 1270 dev_err(&intf->dev, "no more free acm devices\n"); 1271 kfree(acm); 1272 return -ENODEV; 1273 } 1274 1275 ctrlsize = usb_endpoint_maxp(epctrl); 1276 readsize = usb_endpoint_maxp(epread) * 1277 (quirks == SINGLE_RX_URB ? 1 : 2); 1278 acm->combined_interfaces = combined_interfaces; 1279 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1280 acm->control = control_interface; 1281 acm->data = data_interface; 1282 acm->minor = minor; 1283 acm->dev = usb_dev; 1284 acm->ctrl_caps = ac_management_function; 1285 if (quirks & NO_CAP_LINE) 1286 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1287 acm->ctrlsize = ctrlsize; 1288 acm->readsize = readsize; 1289 acm->rx_buflimit = num_rx_buf; 1290 INIT_WORK(&acm->work, acm_softint); 1291 init_waitqueue_head(&acm->wioctl); 1292 spin_lock_init(&acm->write_lock); 1293 spin_lock_init(&acm->read_lock); 1294 mutex_init(&acm->mutex); 1295 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1296 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1297 if (acm->is_int_ep) 1298 acm->bInterval = epread->bInterval; 1299 tty_port_init(&acm->port); 1300 acm->port.ops = &acm_port_ops; 1301 init_usb_anchor(&acm->delayed); 1302 1303 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1304 if (!buf) { 1305 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n"); 1306 goto alloc_fail2; 1307 } 1308 acm->ctrl_buffer = buf; 1309 1310 if (acm_write_buffers_alloc(acm) < 0) { 1311 dev_err(&intf->dev, "out of memory (write buffer alloc)\n"); 1312 goto alloc_fail4; 1313 } 1314 1315 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1316 if (!acm->ctrlurb) { 1317 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); 1318 goto alloc_fail5; 1319 } 1320 for (i = 0; i < num_rx_buf; i++) { 1321 struct acm_rb *rb = &(acm->read_buffers[i]); 1322 struct urb *urb; 1323 1324 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1325 &rb->dma); 1326 if (!rb->base) { 1327 dev_err(&intf->dev, "out of memory " 1328 "(read bufs usb_alloc_coherent)\n"); 1329 goto alloc_fail6; 1330 } 1331 rb->index = i; 1332 rb->instance = acm; 1333 1334 urb = usb_alloc_urb(0, GFP_KERNEL); 1335 if (!urb) { 1336 dev_err(&intf->dev, 1337 "out of memory (read urbs usb_alloc_urb)\n"); 1338 goto alloc_fail6; 1339 } 1340 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1341 urb->transfer_dma = rb->dma; 1342 if (acm->is_int_ep) { 1343 usb_fill_int_urb(urb, acm->dev, 1344 acm->rx_endpoint, 1345 rb->base, 1346 acm->readsize, 1347 acm_read_bulk_callback, rb, 1348 acm->bInterval); 1349 } else { 1350 usb_fill_bulk_urb(urb, acm->dev, 1351 acm->rx_endpoint, 1352 rb->base, 1353 acm->readsize, 1354 acm_read_bulk_callback, rb); 1355 } 1356 1357 acm->read_urbs[i] = urb; 1358 __set_bit(i, &acm->read_urbs_free); 1359 } 1360 for (i = 0; i < ACM_NW; i++) { 1361 struct acm_wb *snd = &(acm->wb[i]); 1362 1363 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1364 if (snd->urb == NULL) { 1365 dev_err(&intf->dev, 1366 "out of memory (write urbs usb_alloc_urb)\n"); 1367 goto alloc_fail7; 1368 } 1369 1370 if (usb_endpoint_xfer_int(epwrite)) 1371 usb_fill_int_urb(snd->urb, usb_dev, 1372 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), 1373 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1374 else 1375 usb_fill_bulk_urb(snd->urb, usb_dev, 1376 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), 1377 NULL, acm->writesize, acm_write_bulk, snd); 1378 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1379 snd->instance = acm; 1380 } 1381 1382 usb_set_intfdata(intf, acm); 1383 1384 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1385 if (i < 0) 1386 goto alloc_fail7; 1387 1388 if (cfd) { /* export the country data */ 1389 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1390 if (!acm->country_codes) 1391 goto skip_countries; 1392 acm->country_code_size = cfd->bLength - 4; 1393 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1394 cfd->bLength - 4); 1395 acm->country_rel_date = cfd->iCountryCodeRelDate; 1396 1397 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1398 if (i < 0) { 1399 kfree(acm->country_codes); 1400 acm->country_codes = NULL; 1401 acm->country_code_size = 0; 1402 goto skip_countries; 1403 } 1404 1405 i = device_create_file(&intf->dev, 1406 &dev_attr_iCountryCodeRelDate); 1407 if (i < 0) { 1408 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1409 kfree(acm->country_codes); 1410 acm->country_codes = NULL; 1411 acm->country_code_size = 0; 1412 goto skip_countries; 1413 } 1414 } 1415 1416skip_countries: 1417 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1418 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1419 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1420 /* works around buggy devices */ 1421 epctrl->bInterval ? epctrl->bInterval : 16); 1422 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1423 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1424 1425 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1426 1427 acm_set_control(acm, acm->ctrlout); 1428 1429 acm->line.dwDTERate = cpu_to_le32(9600); 1430 acm->line.bDataBits = 8; 1431 acm_set_line(acm, &acm->line); 1432 1433 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1434 usb_set_intfdata(data_interface, acm); 1435 1436 usb_get_intf(control_interface); 1437 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1438 &control_interface->dev); 1439 if (IS_ERR(tty_dev)) { 1440 rv = PTR_ERR(tty_dev); 1441 goto alloc_fail8; 1442 } 1443 1444 return 0; 1445alloc_fail8: 1446 if (acm->country_codes) { 1447 device_remove_file(&acm->control->dev, 1448 &dev_attr_wCountryCodes); 1449 device_remove_file(&acm->control->dev, 1450 &dev_attr_iCountryCodeRelDate); 1451 } 1452 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1453alloc_fail7: 1454 usb_set_intfdata(intf, NULL); 1455 for (i = 0; i < ACM_NW; i++) 1456 usb_free_urb(acm->wb[i].urb); 1457alloc_fail6: 1458 for (i = 0; i < num_rx_buf; i++) 1459 usb_free_urb(acm->read_urbs[i]); 1460 acm_read_buffers_free(acm); 1461 usb_free_urb(acm->ctrlurb); 1462alloc_fail5: 1463 acm_write_buffers_free(acm); 1464alloc_fail4: 1465 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1466alloc_fail2: 1467 acm_release_minor(acm); 1468 kfree(acm); 1469alloc_fail: 1470 return rv; 1471} 1472 1473static void stop_data_traffic(struct acm *acm) 1474{ 1475 int i; 1476 1477 dev_dbg(&acm->control->dev, "%s\n", __func__); 1478 1479 usb_kill_urb(acm->ctrlurb); 1480 for (i = 0; i < ACM_NW; i++) 1481 usb_kill_urb(acm->wb[i].urb); 1482 for (i = 0; i < acm->rx_buflimit; i++) 1483 usb_kill_urb(acm->read_urbs[i]); 1484 1485 cancel_work_sync(&acm->work); 1486} 1487 1488static void acm_disconnect(struct usb_interface *intf) 1489{ 1490 struct acm *acm = usb_get_intfdata(intf); 1491 struct usb_device *usb_dev = interface_to_usbdev(intf); 1492 struct tty_struct *tty; 1493 int i; 1494 1495 dev_dbg(&intf->dev, "%s\n", __func__); 1496 1497 /* sibling interface is already cleaning up */ 1498 if (!acm) 1499 return; 1500 1501 mutex_lock(&acm->mutex); 1502 acm->disconnected = true; 1503 if (acm->country_codes) { 1504 device_remove_file(&acm->control->dev, 1505 &dev_attr_wCountryCodes); 1506 device_remove_file(&acm->control->dev, 1507 &dev_attr_iCountryCodeRelDate); 1508 } 1509 wake_up_all(&acm->wioctl); 1510 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1511 usb_set_intfdata(acm->control, NULL); 1512 usb_set_intfdata(acm->data, NULL); 1513 mutex_unlock(&acm->mutex); 1514 1515 tty = tty_port_tty_get(&acm->port); 1516 if (tty) { 1517 tty_vhangup(tty); 1518 tty_kref_put(tty); 1519 } 1520 1521 stop_data_traffic(acm); 1522 1523 tty_unregister_device(acm_tty_driver, acm->minor); 1524 1525 usb_free_urb(acm->ctrlurb); 1526 for (i = 0; i < ACM_NW; i++) 1527 usb_free_urb(acm->wb[i].urb); 1528 for (i = 0; i < acm->rx_buflimit; i++) 1529 usb_free_urb(acm->read_urbs[i]); 1530 acm_write_buffers_free(acm); 1531 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1532 acm_read_buffers_free(acm); 1533 1534 if (!acm->combined_interfaces) 1535 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1536 acm->data : acm->control); 1537 1538 tty_port_put(&acm->port); 1539} 1540 1541#ifdef CONFIG_PM 1542static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1543{ 1544 struct acm *acm = usb_get_intfdata(intf); 1545 int cnt; 1546 1547 spin_lock_irq(&acm->read_lock); 1548 spin_lock(&acm->write_lock); 1549 if (PMSG_IS_AUTO(message)) { 1550 if (acm->transmitting) { 1551 spin_unlock(&acm->write_lock); 1552 spin_unlock_irq(&acm->read_lock); 1553 return -EBUSY; 1554 } 1555 } 1556 cnt = acm->susp_count++; 1557 spin_unlock(&acm->write_lock); 1558 spin_unlock_irq(&acm->read_lock); 1559 1560 if (cnt) 1561 return 0; 1562 1563 stop_data_traffic(acm); 1564 1565 return 0; 1566} 1567 1568static int acm_resume(struct usb_interface *intf) 1569{ 1570 struct acm *acm = usb_get_intfdata(intf); 1571 struct urb *urb; 1572 int rv = 0; 1573 1574 spin_lock_irq(&acm->read_lock); 1575 spin_lock(&acm->write_lock); 1576 1577 if (--acm->susp_count) 1578 goto out; 1579 1580 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) { 1581 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1582 1583 for (;;) { 1584 urb = usb_get_from_anchor(&acm->delayed); 1585 if (!urb) 1586 break; 1587 1588 acm_start_wb(acm, urb->context); 1589 } 1590 1591 /* 1592 * delayed error checking because we must 1593 * do the write path at all cost 1594 */ 1595 if (rv < 0) 1596 goto out; 1597 1598 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1599 } 1600out: 1601 spin_unlock(&acm->write_lock); 1602 spin_unlock_irq(&acm->read_lock); 1603 1604 return rv; 1605} 1606 1607static int acm_reset_resume(struct usb_interface *intf) 1608{ 1609 struct acm *acm = usb_get_intfdata(intf); 1610 1611 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) 1612 tty_port_tty_hangup(&acm->port, false); 1613 1614 return acm_resume(intf); 1615} 1616 1617#endif /* CONFIG_PM */ 1618 1619#define NOKIA_PCSUITE_ACM_INFO(x) \ 1620 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1621 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1622 USB_CDC_ACM_PROTO_VENDOR) 1623 1624#define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1625 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1626 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1627 USB_CDC_ACM_PROTO_VENDOR) 1628 1629/* 1630 * USB driver structure. 1631 */ 1632 1633static const struct usb_device_id acm_ids[] = { 1634 /* quirky and broken devices */ 1635 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1636 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1637 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1638 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1639 }, 1640 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1641 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1642 }, 1643 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1644 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1645 }, 1646 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1647 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1648 }, 1649 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1650 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1651 }, 1652 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1653 .driver_info = SINGLE_RX_URB, 1654 }, 1655 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1656 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1657 }, 1658 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1659 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1660 }, 1661 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1662 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1663 }, 1664 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1665 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1666 }, 1667 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1668 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1669 }, 1670 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1671 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1672 }, 1673 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1674 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1675 }, 1676 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1677 }, 1678 /* Motorola H24 HSPA module: */ 1679 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1680 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1681 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1682 }, 1683 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1684 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1685 }, 1686 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1687 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1688 }, 1689 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1690 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1691 }, 1692 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1693 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1694 }, 1695 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1696 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1697 }, 1698 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1699 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1700 }, 1701 1702 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1703 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1704 data interface instead of 1705 communications interface. 1706 Maybe we should define a new 1707 quirk for this. */ 1708 }, 1709 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1710 .driver_info = NO_UNION_NORMAL, 1711 }, 1712 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1713 .driver_info = NO_UNION_NORMAL, 1714 }, 1715 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1716 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1717 }, 1718 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1719 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1720 }, 1721 1722 /* Nokia S60 phones expose two ACM channels. The first is 1723 * a modem and is picked up by the standard AT-command 1724 * information below. The second is 'vendor-specific' but 1725 * is treated as a serial device at the S60 end, so we want 1726 * to expose it on Linux too. */ 1727 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1728 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1729 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1730 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1731 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1732 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1733 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1734 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1735 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1736 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1737 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1738 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1739 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1740 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1741 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1742 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1743 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1744 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1745 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1746 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1747 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1748 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1749 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1750 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1751 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1752 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1753 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1754 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1755 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1756 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1757 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1758 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1759 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1760 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1761 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1762 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1763 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1764 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1765 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1766 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1767 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1768 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1769 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1770 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1771 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1772 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1773 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1774 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1775 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1776 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1777 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1778 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1779 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1780 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1781 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1782 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1783 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1784 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1785 1786 /* Support for Owen devices */ 1787 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1788 1789 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1790 1791 /* Support Lego NXT using pbLua firmware */ 1792 { USB_DEVICE(0x0694, 0xff00), 1793 .driver_info = NOT_A_MODEM, 1794 }, 1795 1796 /* Support for Droids MuIn LCD */ 1797 { USB_DEVICE(0x04d8, 0x000b), 1798 .driver_info = NO_DATA_INTERFACE, 1799 }, 1800 1801#if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1802 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1803 .driver_info = IGNORE_DEVICE, 1804 }, 1805 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1806 .driver_info = IGNORE_DEVICE, 1807 }, 1808#endif 1809 1810 /* control interfaces without any protocol set */ 1811 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1812 USB_CDC_PROTO_NONE) }, 1813 1814 /* control interfaces with various AT-command sets */ 1815 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1816 USB_CDC_ACM_PROTO_AT_V25TER) }, 1817 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1818 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1819 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1820 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1821 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1822 USB_CDC_ACM_PROTO_AT_GSM) }, 1823 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1824 USB_CDC_ACM_PROTO_AT_3G) }, 1825 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1826 USB_CDC_ACM_PROTO_AT_CDMA) }, 1827 1828 { } 1829}; 1830 1831MODULE_DEVICE_TABLE(usb, acm_ids); 1832 1833static struct usb_driver acm_driver = { 1834 .name = "cdc_acm", 1835 .probe = acm_probe, 1836 .disconnect = acm_disconnect, 1837#ifdef CONFIG_PM 1838 .suspend = acm_suspend, 1839 .resume = acm_resume, 1840 .reset_resume = acm_reset_resume, 1841#endif 1842 .id_table = acm_ids, 1843#ifdef CONFIG_PM 1844 .supports_autosuspend = 1, 1845#endif 1846 .disable_hub_initiated_lpm = 1, 1847}; 1848 1849/* 1850 * TTY driver structures. 1851 */ 1852 1853static const struct tty_operations acm_ops = { 1854 .install = acm_tty_install, 1855 .open = acm_tty_open, 1856 .close = acm_tty_close, 1857 .cleanup = acm_tty_cleanup, 1858 .hangup = acm_tty_hangup, 1859 .write = acm_tty_write, 1860 .write_room = acm_tty_write_room, 1861 .ioctl = acm_tty_ioctl, 1862 .throttle = acm_tty_throttle, 1863 .unthrottle = acm_tty_unthrottle, 1864 .chars_in_buffer = acm_tty_chars_in_buffer, 1865 .break_ctl = acm_tty_break_ctl, 1866 .set_termios = acm_tty_set_termios, 1867 .tiocmget = acm_tty_tiocmget, 1868 .tiocmset = acm_tty_tiocmset, 1869}; 1870 1871/* 1872 * Init / exit. 1873 */ 1874 1875static int __init acm_init(void) 1876{ 1877 int retval; 1878 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1879 if (!acm_tty_driver) 1880 return -ENOMEM; 1881 acm_tty_driver->driver_name = "acm", 1882 acm_tty_driver->name = "ttyACM", 1883 acm_tty_driver->major = ACM_TTY_MAJOR, 1884 acm_tty_driver->minor_start = 0, 1885 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1886 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1887 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1888 acm_tty_driver->init_termios = tty_std_termios; 1889 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1890 HUPCL | CLOCAL; 1891 tty_set_operations(acm_tty_driver, &acm_ops); 1892 1893 retval = tty_register_driver(acm_tty_driver); 1894 if (retval) { 1895 put_tty_driver(acm_tty_driver); 1896 return retval; 1897 } 1898 1899 retval = usb_register(&acm_driver); 1900 if (retval) { 1901 tty_unregister_driver(acm_tty_driver); 1902 put_tty_driver(acm_tty_driver); 1903 return retval; 1904 } 1905 1906 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1907 1908 return 0; 1909} 1910 1911static void __exit acm_exit(void) 1912{ 1913 usb_deregister(&acm_driver); 1914 tty_unregister_driver(acm_tty_driver); 1915 put_tty_driver(acm_tty_driver); 1916} 1917 1918module_init(acm_init); 1919module_exit(acm_exit); 1920 1921MODULE_AUTHOR(DRIVER_AUTHOR); 1922MODULE_DESCRIPTION(DRIVER_DESC); 1923MODULE_LICENSE("GPL"); 1924MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 1925