1 /* 2 * cdc-acm.c 3 * 4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 11 * 12 * USB Abstract Control Model driver for USB modems and ISDN adapters 13 * 14 * Sponsored by SuSE 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 */ 30 31 #undef DEBUG 32 #undef VERBOSE_DEBUG 33 34 #include <linux/kernel.h> 35 #include <linux/sched/signal.h> 36 #include <linux/errno.h> 37 #include <linux/init.h> 38 #include <linux/slab.h> 39 #include <linux/log2.h> 40 #include <linux/tty.h> 41 #include <linux/serial.h> 42 #include <linux/tty_driver.h> 43 #include <linux/tty_flip.h> 44 #include <linux/module.h> 45 #include <linux/mutex.h> 46 #include <linux/uaccess.h> 47 #include <linux/usb.h> 48 #include <linux/usb/cdc.h> 49 #include <asm/byteorder.h> 50 #include <asm/unaligned.h> 51 #include <linux/idr.h> 52 #include <linux/list.h> 53 54 #include "cdc-acm.h" 55 56 57 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 58 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 59 60 static struct usb_driver acm_driver; 61 static struct tty_driver *acm_tty_driver; 62 63 static DEFINE_IDR(acm_minors); 64 static DEFINE_MUTEX(acm_minors_lock); 65 66 static void acm_tty_set_termios(struct tty_struct *tty, 67 struct ktermios *termios_old); 68 69 /* 70 * acm_minors accessors 71 */ 72 73 /* 74 * Look up an ACM structure by minor. If found and not disconnected, increment 75 * its refcount and return it with its mutex held. 76 */ 77 static struct acm *acm_get_by_minor(unsigned int minor) 78 { 79 struct acm *acm; 80 81 mutex_lock(&acm_minors_lock); 82 acm = idr_find(&acm_minors, minor); 83 if (acm) { 84 mutex_lock(&acm->mutex); 85 if (acm->disconnected) { 86 mutex_unlock(&acm->mutex); 87 acm = NULL; 88 } else { 89 tty_port_get(&acm->port); 90 mutex_unlock(&acm->mutex); 91 } 92 } 93 mutex_unlock(&acm_minors_lock); 94 return acm; 95 } 96 97 /* 98 * Try to find an available minor number and if found, associate it with 'acm'. 99 */ 100 static int acm_alloc_minor(struct acm *acm) 101 { 102 int minor; 103 104 mutex_lock(&acm_minors_lock); 105 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 106 mutex_unlock(&acm_minors_lock); 107 108 return minor; 109 } 110 111 /* Release the minor number associated with 'acm'. */ 112 static void acm_release_minor(struct acm *acm) 113 { 114 mutex_lock(&acm_minors_lock); 115 idr_remove(&acm_minors, acm->minor); 116 mutex_unlock(&acm_minors_lock); 117 } 118 119 /* 120 * Functions for ACM control messages. 121 */ 122 123 static int acm_ctrl_msg(struct acm *acm, int request, int value, 124 void *buf, int len) 125 { 126 int retval; 127 128 retval = usb_autopm_get_interface(acm->control); 129 if (retval) 130 return retval; 131 132 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 133 request, USB_RT_ACM, value, 134 acm->control->altsetting[0].desc.bInterfaceNumber, 135 buf, len, 5000); 136 137 dev_dbg(&acm->control->dev, 138 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 139 __func__, request, value, len, retval); 140 141 usb_autopm_put_interface(acm->control); 142 143 return retval < 0 ? retval : 0; 144 } 145 146 /* devices aren't required to support these requests. 147 * the cdc acm descriptor tells whether they do... 148 */ 149 static inline int acm_set_control(struct acm *acm, int control) 150 { 151 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 152 return -EOPNOTSUPP; 153 154 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 155 control, NULL, 0); 156 } 157 158 #define acm_set_line(acm, line) \ 159 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 160 #define acm_send_break(acm, ms) \ 161 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 162 163 static void acm_kill_urbs(struct acm *acm) 164 { 165 int i; 166 167 usb_kill_urb(acm->ctrlurb); 168 for (i = 0; i < ACM_NW; i++) 169 usb_kill_urb(acm->wb[i].urb); 170 for (i = 0; i < acm->rx_buflimit; i++) 171 usb_kill_urb(acm->read_urbs[i]); 172 } 173 174 /* 175 * Write buffer management. 176 * All of these assume proper locks taken by the caller. 177 */ 178 179 static int acm_wb_alloc(struct acm *acm) 180 { 181 int i, wbn; 182 struct acm_wb *wb; 183 184 wbn = 0; 185 i = 0; 186 for (;;) { 187 wb = &acm->wb[wbn]; 188 if (!wb->use) { 189 wb->use = 1; 190 return wbn; 191 } 192 wbn = (wbn + 1) % ACM_NW; 193 if (++i >= ACM_NW) 194 return -1; 195 } 196 } 197 198 static int acm_wb_is_avail(struct acm *acm) 199 { 200 int i, n; 201 unsigned long flags; 202 203 n = ACM_NW; 204 spin_lock_irqsave(&acm->write_lock, flags); 205 for (i = 0; i < ACM_NW; i++) 206 n -= acm->wb[i].use; 207 spin_unlock_irqrestore(&acm->write_lock, flags); 208 return n; 209 } 210 211 /* 212 * Finish write. Caller must hold acm->write_lock 213 */ 214 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 215 { 216 wb->use = 0; 217 acm->transmitting--; 218 usb_autopm_put_interface_async(acm->control); 219 } 220 221 /* 222 * Poke write. 223 * 224 * the caller is responsible for locking 225 */ 226 227 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 228 { 229 int rc; 230 231 acm->transmitting++; 232 233 wb->urb->transfer_buffer = wb->buf; 234 wb->urb->transfer_dma = wb->dmah; 235 wb->urb->transfer_buffer_length = wb->len; 236 wb->urb->dev = acm->dev; 237 238 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 239 if (rc < 0) { 240 dev_err(&acm->data->dev, 241 "%s - usb_submit_urb(write bulk) failed: %d\n", 242 __func__, rc); 243 acm_write_done(acm, wb); 244 } 245 return rc; 246 } 247 248 /* 249 * attributes exported through sysfs 250 */ 251 static ssize_t show_caps 252 (struct device *dev, struct device_attribute *attr, char *buf) 253 { 254 struct usb_interface *intf = to_usb_interface(dev); 255 struct acm *acm = usb_get_intfdata(intf); 256 257 return sprintf(buf, "%d", acm->ctrl_caps); 258 } 259 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); 260 261 static ssize_t show_country_codes 262 (struct device *dev, struct device_attribute *attr, char *buf) 263 { 264 struct usb_interface *intf = to_usb_interface(dev); 265 struct acm *acm = usb_get_intfdata(intf); 266 267 memcpy(buf, acm->country_codes, acm->country_code_size); 268 return acm->country_code_size; 269 } 270 271 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); 272 273 static ssize_t show_country_rel_date 274 (struct device *dev, struct device_attribute *attr, char *buf) 275 { 276 struct usb_interface *intf = to_usb_interface(dev); 277 struct acm *acm = usb_get_intfdata(intf); 278 279 return sprintf(buf, "%d", acm->country_rel_date); 280 } 281 282 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); 283 /* 284 * Interrupt handlers for various ACM device responses 285 */ 286 287 static void acm_process_notification(struct acm *acm, unsigned char *buf) 288 { 289 int newctrl; 290 int difference; 291 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 292 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 293 294 switch (dr->bNotificationType) { 295 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 296 dev_dbg(&acm->control->dev, 297 "%s - network connection: %d\n", __func__, dr->wValue); 298 break; 299 300 case USB_CDC_NOTIFY_SERIAL_STATE: 301 if (le16_to_cpu(dr->wLength) != 2) { 302 dev_dbg(&acm->control->dev, 303 "%s - malformed serial state\n", __func__); 304 break; 305 } 306 307 newctrl = get_unaligned_le16(data); 308 dev_dbg(&acm->control->dev, 309 "%s - serial state: 0x%x\n", __func__, newctrl); 310 311 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 312 dev_dbg(&acm->control->dev, 313 "%s - calling hangup\n", __func__); 314 tty_port_tty_hangup(&acm->port, false); 315 } 316 317 difference = acm->ctrlin ^ newctrl; 318 spin_lock(&acm->read_lock); 319 acm->ctrlin = newctrl; 320 acm->oldcount = acm->iocount; 321 322 if (difference & ACM_CTRL_DSR) 323 acm->iocount.dsr++; 324 if (difference & ACM_CTRL_BRK) 325 acm->iocount.brk++; 326 if (difference & ACM_CTRL_RI) 327 acm->iocount.rng++; 328 if (difference & ACM_CTRL_DCD) 329 acm->iocount.dcd++; 330 if (difference & ACM_CTRL_FRAMING) 331 acm->iocount.frame++; 332 if (difference & ACM_CTRL_PARITY) 333 acm->iocount.parity++; 334 if (difference & ACM_CTRL_OVERRUN) 335 acm->iocount.overrun++; 336 spin_unlock(&acm->read_lock); 337 338 if (difference) 339 wake_up_all(&acm->wioctl); 340 341 break; 342 343 default: 344 dev_dbg(&acm->control->dev, 345 "%s - unknown notification %d received: index %d len %d\n", 346 __func__, 347 dr->bNotificationType, dr->wIndex, dr->wLength); 348 } 349 } 350 351 /* control interface reports status changes with "interrupt" transfers */ 352 static void acm_ctrl_irq(struct urb *urb) 353 { 354 struct acm *acm = urb->context; 355 struct usb_cdc_notification *dr = urb->transfer_buffer; 356 unsigned int current_size = urb->actual_length; 357 unsigned int expected_size, copy_size, alloc_size; 358 int retval; 359 int status = urb->status; 360 361 switch (status) { 362 case 0: 363 /* success */ 364 break; 365 case -ECONNRESET: 366 case -ENOENT: 367 case -ESHUTDOWN: 368 /* this urb is terminated, clean up */ 369 acm->nb_index = 0; 370 dev_dbg(&acm->control->dev, 371 "%s - urb shutting down with status: %d\n", 372 __func__, status); 373 return; 374 default: 375 dev_dbg(&acm->control->dev, 376 "%s - nonzero urb status received: %d\n", 377 __func__, status); 378 goto exit; 379 } 380 381 usb_mark_last_busy(acm->dev); 382 383 if (acm->nb_index) 384 dr = (struct usb_cdc_notification *)acm->notification_buffer; 385 386 /* size = notification-header + (optional) data */ 387 expected_size = sizeof(struct usb_cdc_notification) + 388 le16_to_cpu(dr->wLength); 389 390 if (current_size < expected_size) { 391 /* notification is transmitted fragmented, reassemble */ 392 if (acm->nb_size < expected_size) { 393 if (acm->nb_size) { 394 kfree(acm->notification_buffer); 395 acm->nb_size = 0; 396 } 397 alloc_size = roundup_pow_of_two(expected_size); 398 /* 399 * kmalloc ensures a valid notification_buffer after a 400 * use of kfree in case the previous allocation was too 401 * small. Final freeing is done on disconnect. 402 */ 403 acm->notification_buffer = 404 kmalloc(alloc_size, GFP_ATOMIC); 405 if (!acm->notification_buffer) 406 goto exit; 407 acm->nb_size = alloc_size; 408 } 409 410 copy_size = min(current_size, 411 expected_size - acm->nb_index); 412 413 memcpy(&acm->notification_buffer[acm->nb_index], 414 urb->transfer_buffer, copy_size); 415 acm->nb_index += copy_size; 416 current_size = acm->nb_index; 417 } 418 419 if (current_size >= expected_size) { 420 /* notification complete */ 421 acm_process_notification(acm, (unsigned char *)dr); 422 acm->nb_index = 0; 423 } 424 425 exit: 426 retval = usb_submit_urb(urb, GFP_ATOMIC); 427 if (retval && retval != -EPERM) 428 dev_err(&acm->control->dev, 429 "%s - usb_submit_urb failed: %d\n", __func__, retval); 430 } 431 432 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 433 { 434 int res; 435 436 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 437 return 0; 438 439 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 440 if (res) { 441 if (res != -EPERM) { 442 dev_err(&acm->data->dev, 443 "urb %d failed submission with %d\n", 444 index, res); 445 } 446 set_bit(index, &acm->read_urbs_free); 447 return res; 448 } else { 449 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 450 } 451 452 return 0; 453 } 454 455 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 456 { 457 int res; 458 int i; 459 460 for (i = 0; i < acm->rx_buflimit; ++i) { 461 res = acm_submit_read_urb(acm, i, mem_flags); 462 if (res) 463 return res; 464 } 465 466 return 0; 467 } 468 469 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 470 { 471 if (!urb->actual_length) 472 return; 473 474 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 475 urb->actual_length); 476 tty_flip_buffer_push(&acm->port); 477 } 478 479 static void acm_read_bulk_callback(struct urb *urb) 480 { 481 struct acm_rb *rb = urb->context; 482 struct acm *acm = rb->instance; 483 unsigned long flags; 484 int status = urb->status; 485 486 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 487 rb->index, urb->actual_length, status); 488 489 set_bit(rb->index, &acm->read_urbs_free); 490 491 if (!acm->dev) { 492 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 493 return; 494 } 495 496 switch (status) { 497 case 0: 498 usb_mark_last_busy(acm->dev); 499 acm_process_read_urb(acm, urb); 500 break; 501 case -EPIPE: 502 set_bit(EVENT_RX_STALL, &acm->flags); 503 schedule_work(&acm->work); 504 return; 505 case -ENOENT: 506 case -ECONNRESET: 507 case -ESHUTDOWN: 508 dev_dbg(&acm->data->dev, 509 "%s - urb shutting down with status: %d\n", 510 __func__, status); 511 return; 512 default: 513 dev_dbg(&acm->data->dev, 514 "%s - nonzero urb status received: %d\n", 515 __func__, status); 516 break; 517 } 518 519 /* 520 * Unthrottle may run on another CPU which needs to see events 521 * in the same order. Submission has an implict barrier 522 */ 523 smp_mb__before_atomic(); 524 525 /* throttle device if requested by tty */ 526 spin_lock_irqsave(&acm->read_lock, flags); 527 acm->throttled = acm->throttle_req; 528 if (!acm->throttled) { 529 spin_unlock_irqrestore(&acm->read_lock, flags); 530 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 531 } else { 532 spin_unlock_irqrestore(&acm->read_lock, flags); 533 } 534 } 535 536 /* data interface wrote those outgoing bytes */ 537 static void acm_write_bulk(struct urb *urb) 538 { 539 struct acm_wb *wb = urb->context; 540 struct acm *acm = wb->instance; 541 unsigned long flags; 542 int status = urb->status; 543 544 if (status || (urb->actual_length != urb->transfer_buffer_length)) 545 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 546 urb->actual_length, 547 urb->transfer_buffer_length, 548 status); 549 550 spin_lock_irqsave(&acm->write_lock, flags); 551 acm_write_done(acm, wb); 552 spin_unlock_irqrestore(&acm->write_lock, flags); 553 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 554 schedule_work(&acm->work); 555 } 556 557 static void acm_softint(struct work_struct *work) 558 { 559 int i; 560 struct acm *acm = container_of(work, struct acm, work); 561 562 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 563 if (!(usb_autopm_get_interface(acm->data))) { 564 for (i = 0; i < acm->rx_buflimit; i++) 565 usb_kill_urb(acm->read_urbs[i]); 566 usb_clear_halt(acm->dev, acm->in); 567 acm_submit_read_urbs(acm, GFP_KERNEL); 568 usb_autopm_put_interface(acm->data); 569 } 570 clear_bit(EVENT_RX_STALL, &acm->flags); 571 } 572 573 if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) { 574 tty_port_tty_wakeup(&acm->port); 575 clear_bit(EVENT_TTY_WAKEUP, &acm->flags); 576 } 577 } 578 579 /* 580 * TTY handlers 581 */ 582 583 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 584 { 585 struct acm *acm; 586 int retval; 587 588 acm = acm_get_by_minor(tty->index); 589 if (!acm) 590 return -ENODEV; 591 592 retval = tty_standard_install(driver, tty); 593 if (retval) 594 goto error_init_termios; 595 596 tty->driver_data = acm; 597 598 return 0; 599 600 error_init_termios: 601 tty_port_put(&acm->port); 602 return retval; 603 } 604 605 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 606 { 607 struct acm *acm = tty->driver_data; 608 609 return tty_port_open(&acm->port, tty, filp); 610 } 611 612 static void acm_port_dtr_rts(struct tty_port *port, int raise) 613 { 614 struct acm *acm = container_of(port, struct acm, port); 615 int val; 616 int res; 617 618 if (raise) 619 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 620 else 621 val = 0; 622 623 /* FIXME: add missing ctrlout locking throughout driver */ 624 acm->ctrlout = val; 625 626 res = acm_set_control(acm, val); 627 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 628 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 629 } 630 631 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 632 { 633 struct acm *acm = container_of(port, struct acm, port); 634 int retval = -ENODEV; 635 int i; 636 637 mutex_lock(&acm->mutex); 638 if (acm->disconnected) 639 goto disconnected; 640 641 retval = usb_autopm_get_interface(acm->control); 642 if (retval) 643 goto error_get_interface; 644 645 /* 646 * FIXME: Why do we need this? Allocating 64K of physically contiguous 647 * memory is really nasty... 648 */ 649 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 650 acm->control->needs_remote_wakeup = 1; 651 652 acm->ctrlurb->dev = acm->dev; 653 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 654 if (retval) { 655 dev_err(&acm->control->dev, 656 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 657 goto error_submit_urb; 658 } 659 660 acm_tty_set_termios(tty, NULL); 661 662 /* 663 * Unthrottle device in case the TTY was closed while throttled. 664 */ 665 spin_lock_irq(&acm->read_lock); 666 acm->throttled = 0; 667 acm->throttle_req = 0; 668 spin_unlock_irq(&acm->read_lock); 669 670 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 671 if (retval) 672 goto error_submit_read_urbs; 673 674 usb_autopm_put_interface(acm->control); 675 676 mutex_unlock(&acm->mutex); 677 678 return 0; 679 680 error_submit_read_urbs: 681 for (i = 0; i < acm->rx_buflimit; i++) 682 usb_kill_urb(acm->read_urbs[i]); 683 usb_kill_urb(acm->ctrlurb); 684 error_submit_urb: 685 usb_autopm_put_interface(acm->control); 686 error_get_interface: 687 disconnected: 688 mutex_unlock(&acm->mutex); 689 690 return usb_translate_errors(retval); 691 } 692 693 static void acm_port_destruct(struct tty_port *port) 694 { 695 struct acm *acm = container_of(port, struct acm, port); 696 697 acm_release_minor(acm); 698 usb_put_intf(acm->control); 699 kfree(acm->country_codes); 700 kfree(acm); 701 } 702 703 static void acm_port_shutdown(struct tty_port *port) 704 { 705 struct acm *acm = container_of(port, struct acm, port); 706 struct urb *urb; 707 struct acm_wb *wb; 708 709 /* 710 * Need to grab write_lock to prevent race with resume, but no need to 711 * hold it due to the tty-port initialised flag. 712 */ 713 spin_lock_irq(&acm->write_lock); 714 spin_unlock_irq(&acm->write_lock); 715 716 usb_autopm_get_interface_no_resume(acm->control); 717 acm->control->needs_remote_wakeup = 0; 718 usb_autopm_put_interface(acm->control); 719 720 for (;;) { 721 urb = usb_get_from_anchor(&acm->delayed); 722 if (!urb) 723 break; 724 wb = urb->context; 725 wb->use = 0; 726 usb_autopm_put_interface_async(acm->control); 727 } 728 729 acm_kill_urbs(acm); 730 } 731 732 static void acm_tty_cleanup(struct tty_struct *tty) 733 { 734 struct acm *acm = tty->driver_data; 735 736 tty_port_put(&acm->port); 737 } 738 739 static void acm_tty_hangup(struct tty_struct *tty) 740 { 741 struct acm *acm = tty->driver_data; 742 743 tty_port_hangup(&acm->port); 744 } 745 746 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 747 { 748 struct acm *acm = tty->driver_data; 749 750 tty_port_close(&acm->port, tty, filp); 751 } 752 753 static int acm_tty_write(struct tty_struct *tty, 754 const unsigned char *buf, int count) 755 { 756 struct acm *acm = tty->driver_data; 757 int stat; 758 unsigned long flags; 759 int wbn; 760 struct acm_wb *wb; 761 762 if (!count) 763 return 0; 764 765 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 766 767 spin_lock_irqsave(&acm->write_lock, flags); 768 wbn = acm_wb_alloc(acm); 769 if (wbn < 0) { 770 spin_unlock_irqrestore(&acm->write_lock, flags); 771 return 0; 772 } 773 wb = &acm->wb[wbn]; 774 775 if (!acm->dev) { 776 wb->use = 0; 777 spin_unlock_irqrestore(&acm->write_lock, flags); 778 return -ENODEV; 779 } 780 781 count = (count > acm->writesize) ? acm->writesize : count; 782 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 783 memcpy(wb->buf, buf, count); 784 wb->len = count; 785 786 stat = usb_autopm_get_interface_async(acm->control); 787 if (stat) { 788 wb->use = 0; 789 spin_unlock_irqrestore(&acm->write_lock, flags); 790 return stat; 791 } 792 793 if (acm->susp_count) { 794 if (acm->putbuffer) { 795 /* now to preserve order */ 796 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed); 797 acm->putbuffer = NULL; 798 } 799 usb_anchor_urb(wb->urb, &acm->delayed); 800 spin_unlock_irqrestore(&acm->write_lock, flags); 801 return count; 802 } else { 803 if (acm->putbuffer) { 804 /* at this point there is no good way to handle errors */ 805 acm_start_wb(acm, acm->putbuffer); 806 acm->putbuffer = NULL; 807 } 808 } 809 810 stat = acm_start_wb(acm, wb); 811 spin_unlock_irqrestore(&acm->write_lock, flags); 812 813 if (stat < 0) 814 return stat; 815 return count; 816 } 817 818 static void acm_tty_flush_chars(struct tty_struct *tty) 819 { 820 struct acm *acm = tty->driver_data; 821 struct acm_wb *cur = acm->putbuffer; 822 int err; 823 unsigned long flags; 824 825 if (!cur) /* nothing to do */ 826 return; 827 828 acm->putbuffer = NULL; 829 err = usb_autopm_get_interface_async(acm->control); 830 spin_lock_irqsave(&acm->write_lock, flags); 831 if (err < 0) { 832 cur->use = 0; 833 acm->putbuffer = cur; 834 goto out; 835 } 836 837 if (acm->susp_count) 838 usb_anchor_urb(cur->urb, &acm->delayed); 839 else 840 acm_start_wb(acm, cur); 841 out: 842 spin_unlock_irqrestore(&acm->write_lock, flags); 843 return; 844 } 845 846 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch) 847 { 848 struct acm *acm = tty->driver_data; 849 struct acm_wb *cur; 850 int wbn; 851 unsigned long flags; 852 853 overflow: 854 cur = acm->putbuffer; 855 if (!cur) { 856 spin_lock_irqsave(&acm->write_lock, flags); 857 wbn = acm_wb_alloc(acm); 858 if (wbn >= 0) { 859 cur = &acm->wb[wbn]; 860 acm->putbuffer = cur; 861 } 862 spin_unlock_irqrestore(&acm->write_lock, flags); 863 if (!cur) 864 return 0; 865 } 866 867 if (cur->len == acm->writesize) { 868 acm_tty_flush_chars(tty); 869 goto overflow; 870 } 871 872 cur->buf[cur->len++] = ch; 873 return 1; 874 } 875 876 static int acm_tty_write_room(struct tty_struct *tty) 877 { 878 struct acm *acm = tty->driver_data; 879 /* 880 * Do not let the line discipline to know that we have a reserve, 881 * or it might get too enthusiastic. 882 */ 883 return acm_wb_is_avail(acm) ? acm->writesize : 0; 884 } 885 886 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 887 { 888 struct acm *acm = tty->driver_data; 889 /* 890 * if the device was unplugged then any remaining characters fell out 891 * of the connector ;) 892 */ 893 if (acm->disconnected) 894 return 0; 895 /* 896 * This is inaccurate (overcounts), but it works. 897 */ 898 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 899 } 900 901 static void acm_tty_throttle(struct tty_struct *tty) 902 { 903 struct acm *acm = tty->driver_data; 904 905 spin_lock_irq(&acm->read_lock); 906 acm->throttle_req = 1; 907 spin_unlock_irq(&acm->read_lock); 908 } 909 910 static void acm_tty_unthrottle(struct tty_struct *tty) 911 { 912 struct acm *acm = tty->driver_data; 913 unsigned int was_throttled; 914 915 spin_lock_irq(&acm->read_lock); 916 was_throttled = acm->throttled; 917 acm->throttled = 0; 918 acm->throttle_req = 0; 919 spin_unlock_irq(&acm->read_lock); 920 921 if (was_throttled) 922 acm_submit_read_urbs(acm, GFP_KERNEL); 923 } 924 925 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 926 { 927 struct acm *acm = tty->driver_data; 928 int retval; 929 930 retval = acm_send_break(acm, state ? 0xffff : 0); 931 if (retval < 0) 932 dev_dbg(&acm->control->dev, 933 "%s - send break failed\n", __func__); 934 return retval; 935 } 936 937 static int acm_tty_tiocmget(struct tty_struct *tty) 938 { 939 struct acm *acm = tty->driver_data; 940 941 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 942 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 943 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 944 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 945 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 946 TIOCM_CTS; 947 } 948 949 static int acm_tty_tiocmset(struct tty_struct *tty, 950 unsigned int set, unsigned int clear) 951 { 952 struct acm *acm = tty->driver_data; 953 unsigned int newctrl; 954 955 newctrl = acm->ctrlout; 956 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 957 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 958 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 959 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 960 961 newctrl = (newctrl & ~clear) | set; 962 963 if (acm->ctrlout == newctrl) 964 return 0; 965 return acm_set_control(acm, acm->ctrlout = newctrl); 966 } 967 968 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 969 { 970 struct serial_struct tmp; 971 972 memset(&tmp, 0, sizeof(tmp)); 973 tmp.xmit_fifo_size = acm->writesize; 974 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 975 tmp.close_delay = acm->port.close_delay / 10; 976 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 977 ASYNC_CLOSING_WAIT_NONE : 978 acm->port.closing_wait / 10; 979 980 if (copy_to_user(info, &tmp, sizeof(tmp))) 981 return -EFAULT; 982 else 983 return 0; 984 } 985 986 static int set_serial_info(struct acm *acm, 987 struct serial_struct __user *newinfo) 988 { 989 struct serial_struct new_serial; 990 unsigned int closing_wait, close_delay; 991 int retval = 0; 992 993 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 994 return -EFAULT; 995 996 close_delay = new_serial.close_delay * 10; 997 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 998 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 999 1000 mutex_lock(&acm->port.mutex); 1001 1002 if (!capable(CAP_SYS_ADMIN)) { 1003 if ((close_delay != acm->port.close_delay) || 1004 (closing_wait != acm->port.closing_wait)) 1005 retval = -EPERM; 1006 else 1007 retval = -EOPNOTSUPP; 1008 } else { 1009 acm->port.close_delay = close_delay; 1010 acm->port.closing_wait = closing_wait; 1011 } 1012 1013 mutex_unlock(&acm->port.mutex); 1014 return retval; 1015 } 1016 1017 static int wait_serial_change(struct acm *acm, unsigned long arg) 1018 { 1019 int rv = 0; 1020 DECLARE_WAITQUEUE(wait, current); 1021 struct async_icount old, new; 1022 1023 do { 1024 spin_lock_irq(&acm->read_lock); 1025 old = acm->oldcount; 1026 new = acm->iocount; 1027 acm->oldcount = new; 1028 spin_unlock_irq(&acm->read_lock); 1029 1030 if ((arg & TIOCM_DSR) && 1031 old.dsr != new.dsr) 1032 break; 1033 if ((arg & TIOCM_CD) && 1034 old.dcd != new.dcd) 1035 break; 1036 if ((arg & TIOCM_RI) && 1037 old.rng != new.rng) 1038 break; 1039 1040 add_wait_queue(&acm->wioctl, &wait); 1041 set_current_state(TASK_INTERRUPTIBLE); 1042 schedule(); 1043 remove_wait_queue(&acm->wioctl, &wait); 1044 if (acm->disconnected) { 1045 if (arg & TIOCM_CD) 1046 break; 1047 else 1048 rv = -ENODEV; 1049 } else { 1050 if (signal_pending(current)) 1051 rv = -ERESTARTSYS; 1052 } 1053 } while (!rv); 1054 1055 1056 1057 return rv; 1058 } 1059 1060 static int acm_tty_get_icount(struct tty_struct *tty, 1061 struct serial_icounter_struct *icount) 1062 { 1063 struct acm *acm = tty->driver_data; 1064 1065 icount->dsr = acm->iocount.dsr; 1066 icount->rng = acm->iocount.rng; 1067 icount->dcd = acm->iocount.dcd; 1068 icount->frame = acm->iocount.frame; 1069 icount->overrun = acm->iocount.overrun; 1070 icount->parity = acm->iocount.parity; 1071 icount->brk = acm->iocount.brk; 1072 1073 return 0; 1074 } 1075 1076 static int acm_tty_ioctl(struct tty_struct *tty, 1077 unsigned int cmd, unsigned long arg) 1078 { 1079 struct acm *acm = tty->driver_data; 1080 int rv = -ENOIOCTLCMD; 1081 1082 switch (cmd) { 1083 case TIOCGSERIAL: /* gets serial port data */ 1084 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 1085 break; 1086 case TIOCSSERIAL: 1087 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 1088 break; 1089 case TIOCMIWAIT: 1090 rv = usb_autopm_get_interface(acm->control); 1091 if (rv < 0) { 1092 rv = -EIO; 1093 break; 1094 } 1095 rv = wait_serial_change(acm, arg); 1096 usb_autopm_put_interface(acm->control); 1097 break; 1098 } 1099 1100 return rv; 1101 } 1102 1103 static void acm_tty_set_termios(struct tty_struct *tty, 1104 struct ktermios *termios_old) 1105 { 1106 struct acm *acm = tty->driver_data; 1107 struct ktermios *termios = &tty->termios; 1108 struct usb_cdc_line_coding newline; 1109 int newctrl = acm->ctrlout; 1110 1111 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1112 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1113 newline.bParityType = termios->c_cflag & PARENB ? 1114 (termios->c_cflag & PARODD ? 1 : 2) + 1115 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1116 switch (termios->c_cflag & CSIZE) { 1117 case CS5: 1118 newline.bDataBits = 5; 1119 break; 1120 case CS6: 1121 newline.bDataBits = 6; 1122 break; 1123 case CS7: 1124 newline.bDataBits = 7; 1125 break; 1126 case CS8: 1127 default: 1128 newline.bDataBits = 8; 1129 break; 1130 } 1131 /* FIXME: Needs to clear unsupported bits in the termios */ 1132 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1133 1134 if (C_BAUD(tty) == B0) { 1135 newline.dwDTERate = acm->line.dwDTERate; 1136 newctrl &= ~ACM_CTRL_DTR; 1137 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1138 newctrl |= ACM_CTRL_DTR; 1139 } 1140 1141 if (newctrl != acm->ctrlout) 1142 acm_set_control(acm, acm->ctrlout = newctrl); 1143 1144 if (memcmp(&acm->line, &newline, sizeof newline)) { 1145 memcpy(&acm->line, &newline, sizeof newline); 1146 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1147 __func__, 1148 le32_to_cpu(newline.dwDTERate), 1149 newline.bCharFormat, newline.bParityType, 1150 newline.bDataBits); 1151 acm_set_line(acm, &acm->line); 1152 } 1153 } 1154 1155 static const struct tty_port_operations acm_port_ops = { 1156 .dtr_rts = acm_port_dtr_rts, 1157 .shutdown = acm_port_shutdown, 1158 .activate = acm_port_activate, 1159 .destruct = acm_port_destruct, 1160 }; 1161 1162 /* 1163 * USB probe and disconnect routines. 1164 */ 1165 1166 /* Little helpers: write/read buffers free */ 1167 static void acm_write_buffers_free(struct acm *acm) 1168 { 1169 int i; 1170 struct acm_wb *wb; 1171 1172 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1173 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1174 } 1175 1176 static void acm_read_buffers_free(struct acm *acm) 1177 { 1178 int i; 1179 1180 for (i = 0; i < acm->rx_buflimit; i++) 1181 usb_free_coherent(acm->dev, acm->readsize, 1182 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1183 } 1184 1185 /* Little helper: write buffers allocate */ 1186 static int acm_write_buffers_alloc(struct acm *acm) 1187 { 1188 int i; 1189 struct acm_wb *wb; 1190 1191 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1192 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1193 &wb->dmah); 1194 if (!wb->buf) { 1195 while (i != 0) { 1196 --i; 1197 --wb; 1198 usb_free_coherent(acm->dev, acm->writesize, 1199 wb->buf, wb->dmah); 1200 } 1201 return -ENOMEM; 1202 } 1203 } 1204 return 0; 1205 } 1206 1207 static int acm_probe(struct usb_interface *intf, 1208 const struct usb_device_id *id) 1209 { 1210 struct usb_cdc_union_desc *union_header = NULL; 1211 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1212 unsigned char *buffer = intf->altsetting->extra; 1213 int buflen = intf->altsetting->extralen; 1214 struct usb_interface *control_interface; 1215 struct usb_interface *data_interface; 1216 struct usb_endpoint_descriptor *epctrl = NULL; 1217 struct usb_endpoint_descriptor *epread = NULL; 1218 struct usb_endpoint_descriptor *epwrite = NULL; 1219 struct usb_device *usb_dev = interface_to_usbdev(intf); 1220 struct usb_cdc_parsed_header h; 1221 struct acm *acm; 1222 int minor; 1223 int ctrlsize, readsize; 1224 u8 *buf; 1225 int call_intf_num = -1; 1226 int data_intf_num = -1; 1227 unsigned long quirks; 1228 int num_rx_buf; 1229 int i; 1230 int combined_interfaces = 0; 1231 struct device *tty_dev; 1232 int rv = -ENOMEM; 1233 int res; 1234 1235 /* normal quirks */ 1236 quirks = (unsigned long)id->driver_info; 1237 1238 if (quirks == IGNORE_DEVICE) 1239 return -ENODEV; 1240 1241 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1242 1243 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1244 1245 /* handle quirks deadly to normal probing*/ 1246 if (quirks == NO_UNION_NORMAL) { 1247 data_interface = usb_ifnum_to_if(usb_dev, 1); 1248 control_interface = usb_ifnum_to_if(usb_dev, 0); 1249 /* we would crash */ 1250 if (!data_interface || !control_interface) 1251 return -ENODEV; 1252 goto skip_normal_probe; 1253 } 1254 1255 /* normal probing*/ 1256 if (!buffer) { 1257 dev_err(&intf->dev, "Weird descriptor references\n"); 1258 return -EINVAL; 1259 } 1260 1261 if (!intf->cur_altsetting) 1262 return -EINVAL; 1263 1264 if (!buflen) { 1265 if (intf->cur_altsetting->endpoint && 1266 intf->cur_altsetting->endpoint->extralen && 1267 intf->cur_altsetting->endpoint->extra) { 1268 dev_dbg(&intf->dev, 1269 "Seeking extra descriptors on endpoint\n"); 1270 buflen = intf->cur_altsetting->endpoint->extralen; 1271 buffer = intf->cur_altsetting->endpoint->extra; 1272 } else { 1273 dev_err(&intf->dev, 1274 "Zero length descriptor references\n"); 1275 return -EINVAL; 1276 } 1277 } 1278 1279 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1280 union_header = h.usb_cdc_union_desc; 1281 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1282 if (cmgmd) 1283 call_intf_num = cmgmd->bDataInterface; 1284 1285 if (!union_header) { 1286 if (call_intf_num > 0) { 1287 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1288 /* quirks for Droids MuIn LCD */ 1289 if (quirks & NO_DATA_INTERFACE) { 1290 data_interface = usb_ifnum_to_if(usb_dev, 0); 1291 } else { 1292 data_intf_num = call_intf_num; 1293 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1294 } 1295 control_interface = intf; 1296 } else { 1297 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1298 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1299 return -ENODEV; 1300 } else { 1301 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1302 combined_interfaces = 1; 1303 control_interface = data_interface = intf; 1304 goto look_for_collapsed_interface; 1305 } 1306 } 1307 } else { 1308 data_intf_num = union_header->bSlaveInterface0; 1309 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1310 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1311 } 1312 1313 if (!control_interface || !data_interface) { 1314 dev_dbg(&intf->dev, "no interfaces\n"); 1315 return -ENODEV; 1316 } 1317 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1318 return -ENODEV; 1319 1320 if (data_intf_num != call_intf_num) 1321 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1322 1323 if (control_interface == data_interface) { 1324 /* some broken devices designed for windows work this way */ 1325 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1326 combined_interfaces = 1; 1327 /* a popular other OS doesn't use it */ 1328 quirks |= NO_CAP_LINE; 1329 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1330 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1331 return -EINVAL; 1332 } 1333 look_for_collapsed_interface: 1334 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1335 &epread, &epwrite, &epctrl, NULL); 1336 if (res) 1337 return res; 1338 1339 goto made_compressed_probe; 1340 } 1341 1342 skip_normal_probe: 1343 1344 /*workaround for switched interfaces */ 1345 if (data_interface->cur_altsetting->desc.bInterfaceClass 1346 != CDC_DATA_INTERFACE_TYPE) { 1347 if (control_interface->cur_altsetting->desc.bInterfaceClass 1348 == CDC_DATA_INTERFACE_TYPE) { 1349 dev_dbg(&intf->dev, 1350 "Your device has switched interfaces.\n"); 1351 swap(control_interface, data_interface); 1352 } else { 1353 return -EINVAL; 1354 } 1355 } 1356 1357 /* Accept probe requests only for the control interface */ 1358 if (!combined_interfaces && intf != control_interface) 1359 return -ENODEV; 1360 1361 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1362 /* valid in this context */ 1363 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1364 return -EBUSY; 1365 } 1366 1367 1368 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1369 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1370 return -EINVAL; 1371 1372 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1373 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1374 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1375 1376 1377 /* workaround for switched endpoints */ 1378 if (!usb_endpoint_dir_in(epread)) { 1379 /* descriptors are swapped */ 1380 dev_dbg(&intf->dev, 1381 "The data interface has switched endpoints\n"); 1382 swap(epread, epwrite); 1383 } 1384 made_compressed_probe: 1385 dev_dbg(&intf->dev, "interfaces are valid\n"); 1386 1387 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1388 if (acm == NULL) 1389 goto alloc_fail; 1390 1391 minor = acm_alloc_minor(acm); 1392 if (minor < 0) 1393 goto alloc_fail1; 1394 1395 ctrlsize = usb_endpoint_maxp(epctrl); 1396 readsize = usb_endpoint_maxp(epread) * 1397 (quirks == SINGLE_RX_URB ? 1 : 2); 1398 acm->combined_interfaces = combined_interfaces; 1399 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1400 acm->control = control_interface; 1401 acm->data = data_interface; 1402 acm->minor = minor; 1403 acm->dev = usb_dev; 1404 if (h.usb_cdc_acm_descriptor) 1405 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1406 if (quirks & NO_CAP_LINE) 1407 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1408 acm->ctrlsize = ctrlsize; 1409 acm->readsize = readsize; 1410 acm->rx_buflimit = num_rx_buf; 1411 INIT_WORK(&acm->work, acm_softint); 1412 init_waitqueue_head(&acm->wioctl); 1413 spin_lock_init(&acm->write_lock); 1414 spin_lock_init(&acm->read_lock); 1415 mutex_init(&acm->mutex); 1416 if (usb_endpoint_xfer_int(epread)) { 1417 acm->bInterval = epread->bInterval; 1418 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1419 } else { 1420 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1421 } 1422 if (usb_endpoint_xfer_int(epwrite)) 1423 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1424 else 1425 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1426 tty_port_init(&acm->port); 1427 acm->port.ops = &acm_port_ops; 1428 init_usb_anchor(&acm->delayed); 1429 acm->quirks = quirks; 1430 1431 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1432 if (!buf) 1433 goto alloc_fail2; 1434 acm->ctrl_buffer = buf; 1435 1436 if (acm_write_buffers_alloc(acm) < 0) 1437 goto alloc_fail4; 1438 1439 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1440 if (!acm->ctrlurb) 1441 goto alloc_fail5; 1442 1443 for (i = 0; i < num_rx_buf; i++) { 1444 struct acm_rb *rb = &(acm->read_buffers[i]); 1445 struct urb *urb; 1446 1447 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1448 &rb->dma); 1449 if (!rb->base) 1450 goto alloc_fail6; 1451 rb->index = i; 1452 rb->instance = acm; 1453 1454 urb = usb_alloc_urb(0, GFP_KERNEL); 1455 if (!urb) 1456 goto alloc_fail6; 1457 1458 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1459 urb->transfer_dma = rb->dma; 1460 if (usb_endpoint_xfer_int(epread)) 1461 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1462 acm->readsize, 1463 acm_read_bulk_callback, rb, 1464 acm->bInterval); 1465 else 1466 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1467 acm->readsize, 1468 acm_read_bulk_callback, rb); 1469 1470 acm->read_urbs[i] = urb; 1471 __set_bit(i, &acm->read_urbs_free); 1472 } 1473 for (i = 0; i < ACM_NW; i++) { 1474 struct acm_wb *snd = &(acm->wb[i]); 1475 1476 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1477 if (snd->urb == NULL) 1478 goto alloc_fail7; 1479 1480 if (usb_endpoint_xfer_int(epwrite)) 1481 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1482 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1483 else 1484 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1485 NULL, acm->writesize, acm_write_bulk, snd); 1486 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1487 if (quirks & SEND_ZERO_PACKET) 1488 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1489 snd->instance = acm; 1490 } 1491 1492 usb_set_intfdata(intf, acm); 1493 1494 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1495 if (i < 0) 1496 goto alloc_fail7; 1497 1498 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1499 struct usb_cdc_country_functional_desc * cfd = 1500 h.usb_cdc_country_functional_desc; 1501 1502 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1503 if (!acm->country_codes) 1504 goto skip_countries; 1505 acm->country_code_size = cfd->bLength - 4; 1506 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1507 cfd->bLength - 4); 1508 acm->country_rel_date = cfd->iCountryCodeRelDate; 1509 1510 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1511 if (i < 0) { 1512 kfree(acm->country_codes); 1513 acm->country_codes = NULL; 1514 acm->country_code_size = 0; 1515 goto skip_countries; 1516 } 1517 1518 i = device_create_file(&intf->dev, 1519 &dev_attr_iCountryCodeRelDate); 1520 if (i < 0) { 1521 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1522 kfree(acm->country_codes); 1523 acm->country_codes = NULL; 1524 acm->country_code_size = 0; 1525 goto skip_countries; 1526 } 1527 } 1528 1529 skip_countries: 1530 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1531 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1532 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1533 /* works around buggy devices */ 1534 epctrl->bInterval ? epctrl->bInterval : 16); 1535 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1536 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1537 acm->notification_buffer = NULL; 1538 acm->nb_index = 0; 1539 acm->nb_size = 0; 1540 1541 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1542 1543 acm->line.dwDTERate = cpu_to_le32(9600); 1544 acm->line.bDataBits = 8; 1545 acm_set_line(acm, &acm->line); 1546 1547 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1548 usb_set_intfdata(data_interface, acm); 1549 1550 usb_get_intf(control_interface); 1551 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1552 &control_interface->dev); 1553 if (IS_ERR(tty_dev)) { 1554 rv = PTR_ERR(tty_dev); 1555 goto alloc_fail8; 1556 } 1557 1558 if (quirks & CLEAR_HALT_CONDITIONS) { 1559 usb_clear_halt(usb_dev, acm->in); 1560 usb_clear_halt(usb_dev, acm->out); 1561 } 1562 1563 return 0; 1564 alloc_fail8: 1565 if (acm->country_codes) { 1566 device_remove_file(&acm->control->dev, 1567 &dev_attr_wCountryCodes); 1568 device_remove_file(&acm->control->dev, 1569 &dev_attr_iCountryCodeRelDate); 1570 kfree(acm->country_codes); 1571 } 1572 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1573 alloc_fail7: 1574 usb_set_intfdata(intf, NULL); 1575 for (i = 0; i < ACM_NW; i++) 1576 usb_free_urb(acm->wb[i].urb); 1577 alloc_fail6: 1578 for (i = 0; i < num_rx_buf; i++) 1579 usb_free_urb(acm->read_urbs[i]); 1580 acm_read_buffers_free(acm); 1581 usb_free_urb(acm->ctrlurb); 1582 alloc_fail5: 1583 acm_write_buffers_free(acm); 1584 alloc_fail4: 1585 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1586 alloc_fail2: 1587 acm_release_minor(acm); 1588 alloc_fail1: 1589 kfree(acm); 1590 alloc_fail: 1591 return rv; 1592 } 1593 1594 static void acm_disconnect(struct usb_interface *intf) 1595 { 1596 struct acm *acm = usb_get_intfdata(intf); 1597 struct tty_struct *tty; 1598 1599 /* sibling interface is already cleaning up */ 1600 if (!acm) 1601 return; 1602 1603 mutex_lock(&acm->mutex); 1604 acm->disconnected = true; 1605 if (acm->country_codes) { 1606 device_remove_file(&acm->control->dev, 1607 &dev_attr_wCountryCodes); 1608 device_remove_file(&acm->control->dev, 1609 &dev_attr_iCountryCodeRelDate); 1610 } 1611 wake_up_all(&acm->wioctl); 1612 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1613 usb_set_intfdata(acm->control, NULL); 1614 usb_set_intfdata(acm->data, NULL); 1615 mutex_unlock(&acm->mutex); 1616 1617 tty = tty_port_tty_get(&acm->port); 1618 if (tty) { 1619 tty_vhangup(tty); 1620 tty_kref_put(tty); 1621 } 1622 1623 acm_kill_urbs(acm); 1624 cancel_work_sync(&acm->work); 1625 1626 tty_unregister_device(acm_tty_driver, acm->minor); 1627 1628 acm_write_buffers_free(acm); 1629 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1630 acm_read_buffers_free(acm); 1631 1632 kfree(acm->notification_buffer); 1633 1634 if (!acm->combined_interfaces) 1635 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1636 acm->data : acm->control); 1637 1638 tty_port_put(&acm->port); 1639 } 1640 1641 #ifdef CONFIG_PM 1642 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1643 { 1644 struct acm *acm = usb_get_intfdata(intf); 1645 int cnt; 1646 1647 spin_lock_irq(&acm->write_lock); 1648 if (PMSG_IS_AUTO(message)) { 1649 if (acm->transmitting) { 1650 spin_unlock_irq(&acm->write_lock); 1651 return -EBUSY; 1652 } 1653 } 1654 cnt = acm->susp_count++; 1655 spin_unlock_irq(&acm->write_lock); 1656 1657 if (cnt) 1658 return 0; 1659 1660 acm_kill_urbs(acm); 1661 cancel_work_sync(&acm->work); 1662 1663 return 0; 1664 } 1665 1666 static int acm_resume(struct usb_interface *intf) 1667 { 1668 struct acm *acm = usb_get_intfdata(intf); 1669 struct urb *urb; 1670 int rv = 0; 1671 1672 spin_lock_irq(&acm->write_lock); 1673 1674 if (--acm->susp_count) 1675 goto out; 1676 1677 if (tty_port_initialized(&acm->port)) { 1678 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1679 1680 for (;;) { 1681 urb = usb_get_from_anchor(&acm->delayed); 1682 if (!urb) 1683 break; 1684 1685 acm_start_wb(acm, urb->context); 1686 } 1687 1688 /* 1689 * delayed error checking because we must 1690 * do the write path at all cost 1691 */ 1692 if (rv < 0) 1693 goto out; 1694 1695 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1696 } 1697 out: 1698 spin_unlock_irq(&acm->write_lock); 1699 1700 return rv; 1701 } 1702 1703 static int acm_reset_resume(struct usb_interface *intf) 1704 { 1705 struct acm *acm = usb_get_intfdata(intf); 1706 1707 if (tty_port_initialized(&acm->port)) 1708 tty_port_tty_hangup(&acm->port, false); 1709 1710 return acm_resume(intf); 1711 } 1712 1713 #endif /* CONFIG_PM */ 1714 1715 static int acm_pre_reset(struct usb_interface *intf) 1716 { 1717 struct acm *acm = usb_get_intfdata(intf); 1718 1719 clear_bit(EVENT_RX_STALL, &acm->flags); 1720 1721 return 0; 1722 } 1723 1724 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1725 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1726 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1727 USB_CDC_ACM_PROTO_VENDOR) 1728 1729 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1730 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1731 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1732 USB_CDC_ACM_PROTO_VENDOR) 1733 1734 /* 1735 * USB driver structure. 1736 */ 1737 1738 static const struct usb_device_id acm_ids[] = { 1739 /* quirky and broken devices */ 1740 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1741 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1742 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1743 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1744 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1745 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1746 }, 1747 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1748 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1749 }, 1750 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1751 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1752 }, 1753 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1754 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1755 }, 1756 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1757 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1758 }, 1759 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1760 .driver_info = SINGLE_RX_URB, 1761 }, 1762 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1763 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1764 }, 1765 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1766 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1767 }, 1768 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1769 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1770 }, 1771 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1772 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1773 }, 1774 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1775 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1776 }, 1777 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1778 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1779 }, 1780 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1781 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1782 }, 1783 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1784 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1785 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1786 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1787 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1788 }, 1789 /* Motorola H24 HSPA module: */ 1790 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1791 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1792 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1793 }, 1794 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1795 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1796 }, 1797 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1798 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1799 }, 1800 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1801 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1802 }, 1803 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1804 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1805 }, 1806 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1807 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1808 }, 1809 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1810 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1811 }, 1812 1813 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1814 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1815 data interface instead of 1816 communications interface. 1817 Maybe we should define a new 1818 quirk for this. */ 1819 }, 1820 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1821 .driver_info = NO_UNION_NORMAL, 1822 }, 1823 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1824 .driver_info = NO_UNION_NORMAL, 1825 }, 1826 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1827 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1828 }, 1829 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1830 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1831 }, 1832 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1833 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1834 }, 1835 1836 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1837 .driver_info = CLEAR_HALT_CONDITIONS, 1838 }, 1839 1840 /* Nokia S60 phones expose two ACM channels. The first is 1841 * a modem and is picked up by the standard AT-command 1842 * information below. The second is 'vendor-specific' but 1843 * is treated as a serial device at the S60 end, so we want 1844 * to expose it on Linux too. */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1888 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1889 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1890 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1891 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1892 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1893 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1894 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1895 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1896 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1897 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1898 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1899 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1900 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1901 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1902 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1903 1904 /* Support for Owen devices */ 1905 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1906 1907 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1908 1909 /* Support for Droids MuIn LCD */ 1910 { USB_DEVICE(0x04d8, 0x000b), 1911 .driver_info = NO_DATA_INTERFACE, 1912 }, 1913 1914 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1915 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1916 .driver_info = IGNORE_DEVICE, 1917 }, 1918 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1919 .driver_info = IGNORE_DEVICE, 1920 }, 1921 #endif 1922 1923 /*Samsung phone in firmware update mode */ 1924 { USB_DEVICE(0x04e8, 0x685d), 1925 .driver_info = IGNORE_DEVICE, 1926 }, 1927 1928 /* Exclude Infineon Flash Loader utility */ 1929 { USB_DEVICE(0x058b, 0x0041), 1930 .driver_info = IGNORE_DEVICE, 1931 }, 1932 1933 /* control interfaces without any protocol set */ 1934 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1935 USB_CDC_PROTO_NONE) }, 1936 1937 /* control interfaces with various AT-command sets */ 1938 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1939 USB_CDC_ACM_PROTO_AT_V25TER) }, 1940 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1941 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1942 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1943 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1944 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1945 USB_CDC_ACM_PROTO_AT_GSM) }, 1946 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1947 USB_CDC_ACM_PROTO_AT_3G) }, 1948 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1949 USB_CDC_ACM_PROTO_AT_CDMA) }, 1950 1951 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1952 .driver_info = SEND_ZERO_PACKET, 1953 }, 1954 1955 { } 1956 }; 1957 1958 MODULE_DEVICE_TABLE(usb, acm_ids); 1959 1960 static struct usb_driver acm_driver = { 1961 .name = "cdc_acm", 1962 .probe = acm_probe, 1963 .disconnect = acm_disconnect, 1964 #ifdef CONFIG_PM 1965 .suspend = acm_suspend, 1966 .resume = acm_resume, 1967 .reset_resume = acm_reset_resume, 1968 #endif 1969 .pre_reset = acm_pre_reset, 1970 .id_table = acm_ids, 1971 #ifdef CONFIG_PM 1972 .supports_autosuspend = 1, 1973 #endif 1974 .disable_hub_initiated_lpm = 1, 1975 }; 1976 1977 /* 1978 * TTY driver structures. 1979 */ 1980 1981 static const struct tty_operations acm_ops = { 1982 .install = acm_tty_install, 1983 .open = acm_tty_open, 1984 .close = acm_tty_close, 1985 .cleanup = acm_tty_cleanup, 1986 .hangup = acm_tty_hangup, 1987 .write = acm_tty_write, 1988 .put_char = acm_tty_put_char, 1989 .flush_chars = acm_tty_flush_chars, 1990 .write_room = acm_tty_write_room, 1991 .ioctl = acm_tty_ioctl, 1992 .throttle = acm_tty_throttle, 1993 .unthrottle = acm_tty_unthrottle, 1994 .chars_in_buffer = acm_tty_chars_in_buffer, 1995 .break_ctl = acm_tty_break_ctl, 1996 .set_termios = acm_tty_set_termios, 1997 .tiocmget = acm_tty_tiocmget, 1998 .tiocmset = acm_tty_tiocmset, 1999 .get_icount = acm_tty_get_icount, 2000 }; 2001 2002 /* 2003 * Init / exit. 2004 */ 2005 2006 static int __init acm_init(void) 2007 { 2008 int retval; 2009 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 2010 if (!acm_tty_driver) 2011 return -ENOMEM; 2012 acm_tty_driver->driver_name = "acm", 2013 acm_tty_driver->name = "ttyACM", 2014 acm_tty_driver->major = ACM_TTY_MAJOR, 2015 acm_tty_driver->minor_start = 0, 2016 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2017 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2018 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2019 acm_tty_driver->init_termios = tty_std_termios; 2020 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2021 HUPCL | CLOCAL; 2022 tty_set_operations(acm_tty_driver, &acm_ops); 2023 2024 retval = tty_register_driver(acm_tty_driver); 2025 if (retval) { 2026 put_tty_driver(acm_tty_driver); 2027 return retval; 2028 } 2029 2030 retval = usb_register(&acm_driver); 2031 if (retval) { 2032 tty_unregister_driver(acm_tty_driver); 2033 put_tty_driver(acm_tty_driver); 2034 return retval; 2035 } 2036 2037 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2038 2039 return 0; 2040 } 2041 2042 static void __exit acm_exit(void) 2043 { 2044 usb_deregister(&acm_driver); 2045 tty_unregister_driver(acm_tty_driver); 2046 put_tty_driver(acm_tty_driver); 2047 idr_destroy(&acm_minors); 2048 } 2049 2050 module_init(acm_init); 2051 module_exit(acm_exit); 2052 2053 MODULE_AUTHOR(DRIVER_AUTHOR); 2054 MODULE_DESCRIPTION(DRIVER_DESC); 2055 MODULE_LICENSE("GPL"); 2056 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2057