1 /* 2 * cdc-acm.c 3 * 4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 9 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 11 * 12 * USB Abstract Control Model driver for USB modems and ISDN adapters 13 * 14 * Sponsored by SuSE 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 */ 30 31 #undef DEBUG 32 #undef VERBOSE_DEBUG 33 34 #include <linux/kernel.h> 35 #include <linux/errno.h> 36 #include <linux/init.h> 37 #include <linux/slab.h> 38 #include <linux/tty.h> 39 #include <linux/serial.h> 40 #include <linux/tty_driver.h> 41 #include <linux/tty_flip.h> 42 #include <linux/module.h> 43 #include <linux/mutex.h> 44 #include <linux/uaccess.h> 45 #include <linux/usb.h> 46 #include <linux/usb/cdc.h> 47 #include <asm/byteorder.h> 48 #include <asm/unaligned.h> 49 #include <linux/idr.h> 50 #include <linux/list.h> 51 52 #include "cdc-acm.h" 53 54 55 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 56 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 57 58 static struct usb_driver acm_driver; 59 static struct tty_driver *acm_tty_driver; 60 61 static DEFINE_IDR(acm_minors); 62 static DEFINE_MUTEX(acm_minors_lock); 63 64 static void acm_tty_set_termios(struct tty_struct *tty, 65 struct ktermios *termios_old); 66 67 /* 68 * acm_minors accessors 69 */ 70 71 /* 72 * Look up an ACM structure by minor. If found and not disconnected, increment 73 * its refcount and return it with its mutex held. 74 */ 75 static struct acm *acm_get_by_minor(unsigned int minor) 76 { 77 struct acm *acm; 78 79 mutex_lock(&acm_minors_lock); 80 acm = idr_find(&acm_minors, minor); 81 if (acm) { 82 mutex_lock(&acm->mutex); 83 if (acm->disconnected) { 84 mutex_unlock(&acm->mutex); 85 acm = NULL; 86 } else { 87 tty_port_get(&acm->port); 88 mutex_unlock(&acm->mutex); 89 } 90 } 91 mutex_unlock(&acm_minors_lock); 92 return acm; 93 } 94 95 /* 96 * Try to find an available minor number and if found, associate it with 'acm'. 97 */ 98 static int acm_alloc_minor(struct acm *acm) 99 { 100 int minor; 101 102 mutex_lock(&acm_minors_lock); 103 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 104 mutex_unlock(&acm_minors_lock); 105 106 return minor; 107 } 108 109 /* Release the minor number associated with 'acm'. */ 110 static void acm_release_minor(struct acm *acm) 111 { 112 mutex_lock(&acm_minors_lock); 113 idr_remove(&acm_minors, acm->minor); 114 mutex_unlock(&acm_minors_lock); 115 } 116 117 /* 118 * Functions for ACM control messages. 119 */ 120 121 static int acm_ctrl_msg(struct acm *acm, int request, int value, 122 void *buf, int len) 123 { 124 int retval; 125 126 retval = usb_autopm_get_interface(acm->control); 127 if (retval) 128 return retval; 129 130 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 131 request, USB_RT_ACM, value, 132 acm->control->altsetting[0].desc.bInterfaceNumber, 133 buf, len, 5000); 134 135 dev_dbg(&acm->control->dev, 136 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 137 __func__, request, value, len, retval); 138 139 usb_autopm_put_interface(acm->control); 140 141 return retval < 0 ? retval : 0; 142 } 143 144 /* devices aren't required to support these requests. 145 * the cdc acm descriptor tells whether they do... 146 */ 147 static inline int acm_set_control(struct acm *acm, int control) 148 { 149 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 150 return -EOPNOTSUPP; 151 152 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 153 control, NULL, 0); 154 } 155 156 #define acm_set_line(acm, line) \ 157 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 158 #define acm_send_break(acm, ms) \ 159 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 160 161 /* 162 * Write buffer management. 163 * All of these assume proper locks taken by the caller. 164 */ 165 166 static int acm_wb_alloc(struct acm *acm) 167 { 168 int i, wbn; 169 struct acm_wb *wb; 170 171 wbn = 0; 172 i = 0; 173 for (;;) { 174 wb = &acm->wb[wbn]; 175 if (!wb->use) { 176 wb->use = 1; 177 return wbn; 178 } 179 wbn = (wbn + 1) % ACM_NW; 180 if (++i >= ACM_NW) 181 return -1; 182 } 183 } 184 185 static int acm_wb_is_avail(struct acm *acm) 186 { 187 int i, n; 188 unsigned long flags; 189 190 n = ACM_NW; 191 spin_lock_irqsave(&acm->write_lock, flags); 192 for (i = 0; i < ACM_NW; i++) 193 n -= acm->wb[i].use; 194 spin_unlock_irqrestore(&acm->write_lock, flags); 195 return n; 196 } 197 198 /* 199 * Finish write. Caller must hold acm->write_lock 200 */ 201 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 202 { 203 wb->use = 0; 204 acm->transmitting--; 205 usb_autopm_put_interface_async(acm->control); 206 } 207 208 /* 209 * Poke write. 210 * 211 * the caller is responsible for locking 212 */ 213 214 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 215 { 216 int rc; 217 218 acm->transmitting++; 219 220 wb->urb->transfer_buffer = wb->buf; 221 wb->urb->transfer_dma = wb->dmah; 222 wb->urb->transfer_buffer_length = wb->len; 223 wb->urb->dev = acm->dev; 224 225 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 226 if (rc < 0) { 227 dev_err(&acm->data->dev, 228 "%s - usb_submit_urb(write bulk) failed: %d\n", 229 __func__, rc); 230 acm_write_done(acm, wb); 231 } 232 return rc; 233 } 234 235 /* 236 * attributes exported through sysfs 237 */ 238 static ssize_t show_caps 239 (struct device *dev, struct device_attribute *attr, char *buf) 240 { 241 struct usb_interface *intf = to_usb_interface(dev); 242 struct acm *acm = usb_get_intfdata(intf); 243 244 return sprintf(buf, "%d", acm->ctrl_caps); 245 } 246 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); 247 248 static ssize_t show_country_codes 249 (struct device *dev, struct device_attribute *attr, char *buf) 250 { 251 struct usb_interface *intf = to_usb_interface(dev); 252 struct acm *acm = usb_get_intfdata(intf); 253 254 memcpy(buf, acm->country_codes, acm->country_code_size); 255 return acm->country_code_size; 256 } 257 258 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); 259 260 static ssize_t show_country_rel_date 261 (struct device *dev, struct device_attribute *attr, char *buf) 262 { 263 struct usb_interface *intf = to_usb_interface(dev); 264 struct acm *acm = usb_get_intfdata(intf); 265 266 return sprintf(buf, "%d", acm->country_rel_date); 267 } 268 269 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); 270 /* 271 * Interrupt handlers for various ACM device responses 272 */ 273 274 /* control interface reports status changes with "interrupt" transfers */ 275 static void acm_ctrl_irq(struct urb *urb) 276 { 277 struct acm *acm = urb->context; 278 struct usb_cdc_notification *dr = urb->transfer_buffer; 279 unsigned char *data; 280 int newctrl; 281 int difference; 282 int retval; 283 int status = urb->status; 284 285 switch (status) { 286 case 0: 287 /* success */ 288 break; 289 case -ECONNRESET: 290 case -ENOENT: 291 case -ESHUTDOWN: 292 /* this urb is terminated, clean up */ 293 dev_dbg(&acm->control->dev, 294 "%s - urb shutting down with status: %d\n", 295 __func__, status); 296 return; 297 default: 298 dev_dbg(&acm->control->dev, 299 "%s - nonzero urb status received: %d\n", 300 __func__, status); 301 goto exit; 302 } 303 304 usb_mark_last_busy(acm->dev); 305 306 data = (unsigned char *)(dr + 1); 307 switch (dr->bNotificationType) { 308 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 309 dev_dbg(&acm->control->dev, "%s - network connection: %d\n", 310 __func__, dr->wValue); 311 break; 312 313 case USB_CDC_NOTIFY_SERIAL_STATE: 314 newctrl = get_unaligned_le16(data); 315 316 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 317 dev_dbg(&acm->control->dev, "%s - calling hangup\n", 318 __func__); 319 tty_port_tty_hangup(&acm->port, false); 320 } 321 322 difference = acm->ctrlin ^ newctrl; 323 spin_lock(&acm->read_lock); 324 acm->ctrlin = newctrl; 325 acm->oldcount = acm->iocount; 326 327 if (difference & ACM_CTRL_DSR) 328 acm->iocount.dsr++; 329 if (difference & ACM_CTRL_BRK) 330 acm->iocount.brk++; 331 if (difference & ACM_CTRL_RI) 332 acm->iocount.rng++; 333 if (difference & ACM_CTRL_DCD) 334 acm->iocount.dcd++; 335 if (difference & ACM_CTRL_FRAMING) 336 acm->iocount.frame++; 337 if (difference & ACM_CTRL_PARITY) 338 acm->iocount.parity++; 339 if (difference & ACM_CTRL_OVERRUN) 340 acm->iocount.overrun++; 341 spin_unlock(&acm->read_lock); 342 343 if (difference) 344 wake_up_all(&acm->wioctl); 345 346 break; 347 348 default: 349 dev_dbg(&acm->control->dev, 350 "%s - unknown notification %d received: index %d " 351 "len %d data0 %d data1 %d\n", 352 __func__, 353 dr->bNotificationType, dr->wIndex, 354 dr->wLength, data[0], data[1]); 355 break; 356 } 357 exit: 358 retval = usb_submit_urb(urb, GFP_ATOMIC); 359 if (retval && retval != -EPERM) 360 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", 361 __func__, retval); 362 } 363 364 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 365 { 366 int res; 367 368 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 369 return 0; 370 371 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index); 372 373 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 374 if (res) { 375 if (res != -EPERM) { 376 dev_err(&acm->data->dev, 377 "%s - usb_submit_urb failed: %d\n", 378 __func__, res); 379 } 380 set_bit(index, &acm->read_urbs_free); 381 return res; 382 } 383 384 return 0; 385 } 386 387 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 388 { 389 int res; 390 int i; 391 392 for (i = 0; i < acm->rx_buflimit; ++i) { 393 res = acm_submit_read_urb(acm, i, mem_flags); 394 if (res) 395 return res; 396 } 397 398 return 0; 399 } 400 401 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 402 { 403 if (!urb->actual_length) 404 return; 405 406 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 407 urb->actual_length); 408 tty_flip_buffer_push(&acm->port); 409 } 410 411 static void acm_read_bulk_callback(struct urb *urb) 412 { 413 struct acm_rb *rb = urb->context; 414 struct acm *acm = rb->instance; 415 unsigned long flags; 416 int status = urb->status; 417 418 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__, 419 rb->index, urb->actual_length); 420 421 if (!acm->dev) { 422 set_bit(rb->index, &acm->read_urbs_free); 423 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 424 return; 425 } 426 427 if (status) { 428 set_bit(rb->index, &acm->read_urbs_free); 429 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n", 430 __func__, status); 431 if ((status != -ENOENT) || (urb->actual_length == 0)) 432 return; 433 } 434 435 usb_mark_last_busy(acm->dev); 436 437 acm_process_read_urb(acm, urb); 438 /* 439 * Unthrottle may run on another CPU which needs to see events 440 * in the same order. Submission has an implict barrier 441 */ 442 smp_mb__before_atomic(); 443 set_bit(rb->index, &acm->read_urbs_free); 444 445 /* throttle device if requested by tty */ 446 spin_lock_irqsave(&acm->read_lock, flags); 447 acm->throttled = acm->throttle_req; 448 if (!acm->throttled) { 449 spin_unlock_irqrestore(&acm->read_lock, flags); 450 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 451 } else { 452 spin_unlock_irqrestore(&acm->read_lock, flags); 453 } 454 } 455 456 /* data interface wrote those outgoing bytes */ 457 static void acm_write_bulk(struct urb *urb) 458 { 459 struct acm_wb *wb = urb->context; 460 struct acm *acm = wb->instance; 461 unsigned long flags; 462 int status = urb->status; 463 464 if (status || (urb->actual_length != urb->transfer_buffer_length)) 465 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n", 466 __func__, 467 urb->actual_length, 468 urb->transfer_buffer_length, 469 status); 470 471 spin_lock_irqsave(&acm->write_lock, flags); 472 acm_write_done(acm, wb); 473 spin_unlock_irqrestore(&acm->write_lock, flags); 474 schedule_work(&acm->work); 475 } 476 477 static void acm_softint(struct work_struct *work) 478 { 479 struct acm *acm = container_of(work, struct acm, work); 480 481 dev_vdbg(&acm->data->dev, "%s\n", __func__); 482 483 tty_port_tty_wakeup(&acm->port); 484 } 485 486 /* 487 * TTY handlers 488 */ 489 490 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 491 { 492 struct acm *acm; 493 int retval; 494 495 dev_dbg(tty->dev, "%s\n", __func__); 496 497 acm = acm_get_by_minor(tty->index); 498 if (!acm) 499 return -ENODEV; 500 501 retval = tty_standard_install(driver, tty); 502 if (retval) 503 goto error_init_termios; 504 505 tty->driver_data = acm; 506 507 return 0; 508 509 error_init_termios: 510 tty_port_put(&acm->port); 511 return retval; 512 } 513 514 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 515 { 516 struct acm *acm = tty->driver_data; 517 518 dev_dbg(tty->dev, "%s\n", __func__); 519 520 return tty_port_open(&acm->port, tty, filp); 521 } 522 523 static void acm_port_dtr_rts(struct tty_port *port, int raise) 524 { 525 struct acm *acm = container_of(port, struct acm, port); 526 int val; 527 int res; 528 529 if (raise) 530 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 531 else 532 val = 0; 533 534 /* FIXME: add missing ctrlout locking throughout driver */ 535 acm->ctrlout = val; 536 537 res = acm_set_control(acm, val); 538 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 539 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 540 } 541 542 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 543 { 544 struct acm *acm = container_of(port, struct acm, port); 545 int retval = -ENODEV; 546 int i; 547 548 dev_dbg(&acm->control->dev, "%s\n", __func__); 549 550 mutex_lock(&acm->mutex); 551 if (acm->disconnected) 552 goto disconnected; 553 554 retval = usb_autopm_get_interface(acm->control); 555 if (retval) 556 goto error_get_interface; 557 558 /* 559 * FIXME: Why do we need this? Allocating 64K of physically contiguous 560 * memory is really nasty... 561 */ 562 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 563 acm->control->needs_remote_wakeup = 1; 564 565 acm->ctrlurb->dev = acm->dev; 566 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 567 if (retval) { 568 dev_err(&acm->control->dev, 569 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 570 goto error_submit_urb; 571 } 572 573 acm_tty_set_termios(tty, NULL); 574 575 /* 576 * Unthrottle device in case the TTY was closed while throttled. 577 */ 578 spin_lock_irq(&acm->read_lock); 579 acm->throttled = 0; 580 acm->throttle_req = 0; 581 spin_unlock_irq(&acm->read_lock); 582 583 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 584 if (retval) 585 goto error_submit_read_urbs; 586 587 usb_autopm_put_interface(acm->control); 588 589 mutex_unlock(&acm->mutex); 590 591 return 0; 592 593 error_submit_read_urbs: 594 for (i = 0; i < acm->rx_buflimit; i++) 595 usb_kill_urb(acm->read_urbs[i]); 596 usb_kill_urb(acm->ctrlurb); 597 error_submit_urb: 598 usb_autopm_put_interface(acm->control); 599 error_get_interface: 600 disconnected: 601 mutex_unlock(&acm->mutex); 602 603 return usb_translate_errors(retval); 604 } 605 606 static void acm_port_destruct(struct tty_port *port) 607 { 608 struct acm *acm = container_of(port, struct acm, port); 609 610 dev_dbg(&acm->control->dev, "%s\n", __func__); 611 612 acm_release_minor(acm); 613 usb_put_intf(acm->control); 614 kfree(acm->country_codes); 615 kfree(acm); 616 } 617 618 static void acm_port_shutdown(struct tty_port *port) 619 { 620 struct acm *acm = container_of(port, struct acm, port); 621 struct urb *urb; 622 struct acm_wb *wb; 623 int i; 624 625 dev_dbg(&acm->control->dev, "%s\n", __func__); 626 627 /* 628 * Need to grab write_lock to prevent race with resume, but no need to 629 * hold it due to the tty-port initialised flag. 630 */ 631 spin_lock_irq(&acm->write_lock); 632 spin_unlock_irq(&acm->write_lock); 633 634 usb_autopm_get_interface_no_resume(acm->control); 635 acm->control->needs_remote_wakeup = 0; 636 usb_autopm_put_interface(acm->control); 637 638 for (;;) { 639 urb = usb_get_from_anchor(&acm->delayed); 640 if (!urb) 641 break; 642 wb = urb->context; 643 wb->use = 0; 644 usb_autopm_put_interface_async(acm->control); 645 } 646 647 usb_kill_urb(acm->ctrlurb); 648 for (i = 0; i < ACM_NW; i++) 649 usb_kill_urb(acm->wb[i].urb); 650 for (i = 0; i < acm->rx_buflimit; i++) 651 usb_kill_urb(acm->read_urbs[i]); 652 } 653 654 static void acm_tty_cleanup(struct tty_struct *tty) 655 { 656 struct acm *acm = tty->driver_data; 657 dev_dbg(&acm->control->dev, "%s\n", __func__); 658 tty_port_put(&acm->port); 659 } 660 661 static void acm_tty_hangup(struct tty_struct *tty) 662 { 663 struct acm *acm = tty->driver_data; 664 dev_dbg(&acm->control->dev, "%s\n", __func__); 665 tty_port_hangup(&acm->port); 666 } 667 668 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 669 { 670 struct acm *acm = tty->driver_data; 671 dev_dbg(&acm->control->dev, "%s\n", __func__); 672 tty_port_close(&acm->port, tty, filp); 673 } 674 675 static int acm_tty_write(struct tty_struct *tty, 676 const unsigned char *buf, int count) 677 { 678 struct acm *acm = tty->driver_data; 679 int stat; 680 unsigned long flags; 681 int wbn; 682 struct acm_wb *wb; 683 684 if (!count) 685 return 0; 686 687 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count); 688 689 spin_lock_irqsave(&acm->write_lock, flags); 690 wbn = acm_wb_alloc(acm); 691 if (wbn < 0) { 692 spin_unlock_irqrestore(&acm->write_lock, flags); 693 return 0; 694 } 695 wb = &acm->wb[wbn]; 696 697 if (!acm->dev) { 698 wb->use = 0; 699 spin_unlock_irqrestore(&acm->write_lock, flags); 700 return -ENODEV; 701 } 702 703 count = (count > acm->writesize) ? acm->writesize : count; 704 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count); 705 memcpy(wb->buf, buf, count); 706 wb->len = count; 707 708 stat = usb_autopm_get_interface_async(acm->control); 709 if (stat) { 710 wb->use = 0; 711 spin_unlock_irqrestore(&acm->write_lock, flags); 712 return stat; 713 } 714 715 if (acm->susp_count) { 716 if (acm->putbuffer) { 717 /* now to preserve order */ 718 usb_anchor_urb(acm->putbuffer->urb, &acm->delayed); 719 acm->putbuffer = NULL; 720 } 721 usb_anchor_urb(wb->urb, &acm->delayed); 722 spin_unlock_irqrestore(&acm->write_lock, flags); 723 return count; 724 } else { 725 if (acm->putbuffer) { 726 /* at this point there is no good way to handle errors */ 727 acm_start_wb(acm, acm->putbuffer); 728 acm->putbuffer = NULL; 729 } 730 } 731 732 stat = acm_start_wb(acm, wb); 733 spin_unlock_irqrestore(&acm->write_lock, flags); 734 735 if (stat < 0) 736 return stat; 737 return count; 738 } 739 740 static void acm_tty_flush_chars(struct tty_struct *tty) 741 { 742 struct acm *acm = tty->driver_data; 743 struct acm_wb *cur = acm->putbuffer; 744 int err; 745 unsigned long flags; 746 747 if (!cur) /* nothing to do */ 748 return; 749 750 acm->putbuffer = NULL; 751 err = usb_autopm_get_interface_async(acm->control); 752 spin_lock_irqsave(&acm->write_lock, flags); 753 if (err < 0) { 754 cur->use = 0; 755 acm->putbuffer = cur; 756 goto out; 757 } 758 759 if (acm->susp_count) 760 usb_anchor_urb(cur->urb, &acm->delayed); 761 else 762 acm_start_wb(acm, cur); 763 out: 764 spin_unlock_irqrestore(&acm->write_lock, flags); 765 return; 766 } 767 768 static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch) 769 { 770 struct acm *acm = tty->driver_data; 771 struct acm_wb *cur; 772 int wbn; 773 unsigned long flags; 774 775 overflow: 776 cur = acm->putbuffer; 777 if (!cur) { 778 spin_lock_irqsave(&acm->write_lock, flags); 779 wbn = acm_wb_alloc(acm); 780 if (wbn >= 0) { 781 cur = &acm->wb[wbn]; 782 acm->putbuffer = cur; 783 } 784 spin_unlock_irqrestore(&acm->write_lock, flags); 785 if (!cur) 786 return 0; 787 } 788 789 if (cur->len == acm->writesize) { 790 acm_tty_flush_chars(tty); 791 goto overflow; 792 } 793 794 cur->buf[cur->len++] = ch; 795 return 1; 796 } 797 798 static int acm_tty_write_room(struct tty_struct *tty) 799 { 800 struct acm *acm = tty->driver_data; 801 /* 802 * Do not let the line discipline to know that we have a reserve, 803 * or it might get too enthusiastic. 804 */ 805 return acm_wb_is_avail(acm) ? acm->writesize : 0; 806 } 807 808 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 809 { 810 struct acm *acm = tty->driver_data; 811 /* 812 * if the device was unplugged then any remaining characters fell out 813 * of the connector ;) 814 */ 815 if (acm->disconnected) 816 return 0; 817 /* 818 * This is inaccurate (overcounts), but it works. 819 */ 820 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 821 } 822 823 static void acm_tty_throttle(struct tty_struct *tty) 824 { 825 struct acm *acm = tty->driver_data; 826 827 spin_lock_irq(&acm->read_lock); 828 acm->throttle_req = 1; 829 spin_unlock_irq(&acm->read_lock); 830 } 831 832 static void acm_tty_unthrottle(struct tty_struct *tty) 833 { 834 struct acm *acm = tty->driver_data; 835 unsigned int was_throttled; 836 837 spin_lock_irq(&acm->read_lock); 838 was_throttled = acm->throttled; 839 acm->throttled = 0; 840 acm->throttle_req = 0; 841 spin_unlock_irq(&acm->read_lock); 842 843 if (was_throttled) 844 acm_submit_read_urbs(acm, GFP_KERNEL); 845 } 846 847 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 848 { 849 struct acm *acm = tty->driver_data; 850 int retval; 851 852 retval = acm_send_break(acm, state ? 0xffff : 0); 853 if (retval < 0) 854 dev_dbg(&acm->control->dev, "%s - send break failed\n", 855 __func__); 856 return retval; 857 } 858 859 static int acm_tty_tiocmget(struct tty_struct *tty) 860 { 861 struct acm *acm = tty->driver_data; 862 863 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 864 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 865 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 866 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 867 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 868 TIOCM_CTS; 869 } 870 871 static int acm_tty_tiocmset(struct tty_struct *tty, 872 unsigned int set, unsigned int clear) 873 { 874 struct acm *acm = tty->driver_data; 875 unsigned int newctrl; 876 877 newctrl = acm->ctrlout; 878 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 879 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 880 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 881 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 882 883 newctrl = (newctrl & ~clear) | set; 884 885 if (acm->ctrlout == newctrl) 886 return 0; 887 return acm_set_control(acm, acm->ctrlout = newctrl); 888 } 889 890 static int get_serial_info(struct acm *acm, struct serial_struct __user *info) 891 { 892 struct serial_struct tmp; 893 894 if (!info) 895 return -EINVAL; 896 897 memset(&tmp, 0, sizeof(tmp)); 898 tmp.flags = ASYNC_LOW_LATENCY; 899 tmp.xmit_fifo_size = acm->writesize; 900 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate); 901 tmp.close_delay = acm->port.close_delay / 10; 902 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 903 ASYNC_CLOSING_WAIT_NONE : 904 acm->port.closing_wait / 10; 905 906 if (copy_to_user(info, &tmp, sizeof(tmp))) 907 return -EFAULT; 908 else 909 return 0; 910 } 911 912 static int set_serial_info(struct acm *acm, 913 struct serial_struct __user *newinfo) 914 { 915 struct serial_struct new_serial; 916 unsigned int closing_wait, close_delay; 917 int retval = 0; 918 919 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 920 return -EFAULT; 921 922 close_delay = new_serial.close_delay * 10; 923 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 924 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; 925 926 mutex_lock(&acm->port.mutex); 927 928 if (!capable(CAP_SYS_ADMIN)) { 929 if ((close_delay != acm->port.close_delay) || 930 (closing_wait != acm->port.closing_wait)) 931 retval = -EPERM; 932 else 933 retval = -EOPNOTSUPP; 934 } else { 935 acm->port.close_delay = close_delay; 936 acm->port.closing_wait = closing_wait; 937 } 938 939 mutex_unlock(&acm->port.mutex); 940 return retval; 941 } 942 943 static int wait_serial_change(struct acm *acm, unsigned long arg) 944 { 945 int rv = 0; 946 DECLARE_WAITQUEUE(wait, current); 947 struct async_icount old, new; 948 949 if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD )) 950 return -EINVAL; 951 do { 952 spin_lock_irq(&acm->read_lock); 953 old = acm->oldcount; 954 new = acm->iocount; 955 acm->oldcount = new; 956 spin_unlock_irq(&acm->read_lock); 957 958 if ((arg & TIOCM_DSR) && 959 old.dsr != new.dsr) 960 break; 961 if ((arg & TIOCM_CD) && 962 old.dcd != new.dcd) 963 break; 964 if ((arg & TIOCM_RI) && 965 old.rng != new.rng) 966 break; 967 968 add_wait_queue(&acm->wioctl, &wait); 969 set_current_state(TASK_INTERRUPTIBLE); 970 schedule(); 971 remove_wait_queue(&acm->wioctl, &wait); 972 if (acm->disconnected) { 973 if (arg & TIOCM_CD) 974 break; 975 else 976 rv = -ENODEV; 977 } else { 978 if (signal_pending(current)) 979 rv = -ERESTARTSYS; 980 } 981 } while (!rv); 982 983 984 985 return rv; 986 } 987 988 static int get_serial_usage(struct acm *acm, 989 struct serial_icounter_struct __user *count) 990 { 991 struct serial_icounter_struct icount; 992 int rv = 0; 993 994 memset(&icount, 0, sizeof(icount)); 995 icount.dsr = acm->iocount.dsr; 996 icount.rng = acm->iocount.rng; 997 icount.dcd = acm->iocount.dcd; 998 icount.frame = acm->iocount.frame; 999 icount.overrun = acm->iocount.overrun; 1000 icount.parity = acm->iocount.parity; 1001 icount.brk = acm->iocount.brk; 1002 1003 if (copy_to_user(count, &icount, sizeof(icount)) > 0) 1004 rv = -EFAULT; 1005 1006 return rv; 1007 } 1008 1009 static int acm_tty_ioctl(struct tty_struct *tty, 1010 unsigned int cmd, unsigned long arg) 1011 { 1012 struct acm *acm = tty->driver_data; 1013 int rv = -ENOIOCTLCMD; 1014 1015 switch (cmd) { 1016 case TIOCGSERIAL: /* gets serial port data */ 1017 rv = get_serial_info(acm, (struct serial_struct __user *) arg); 1018 break; 1019 case TIOCSSERIAL: 1020 rv = set_serial_info(acm, (struct serial_struct __user *) arg); 1021 break; 1022 case TIOCMIWAIT: 1023 rv = usb_autopm_get_interface(acm->control); 1024 if (rv < 0) { 1025 rv = -EIO; 1026 break; 1027 } 1028 rv = wait_serial_change(acm, arg); 1029 usb_autopm_put_interface(acm->control); 1030 break; 1031 case TIOCGICOUNT: 1032 rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg); 1033 break; 1034 } 1035 1036 return rv; 1037 } 1038 1039 static void acm_tty_set_termios(struct tty_struct *tty, 1040 struct ktermios *termios_old) 1041 { 1042 struct acm *acm = tty->driver_data; 1043 struct ktermios *termios = &tty->termios; 1044 struct usb_cdc_line_coding newline; 1045 int newctrl = acm->ctrlout; 1046 1047 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1048 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1049 newline.bParityType = termios->c_cflag & PARENB ? 1050 (termios->c_cflag & PARODD ? 1 : 2) + 1051 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1052 switch (termios->c_cflag & CSIZE) { 1053 case CS5: 1054 newline.bDataBits = 5; 1055 break; 1056 case CS6: 1057 newline.bDataBits = 6; 1058 break; 1059 case CS7: 1060 newline.bDataBits = 7; 1061 break; 1062 case CS8: 1063 default: 1064 newline.bDataBits = 8; 1065 break; 1066 } 1067 /* FIXME: Needs to clear unsupported bits in the termios */ 1068 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1069 1070 if (C_BAUD(tty) == B0) { 1071 newline.dwDTERate = acm->line.dwDTERate; 1072 newctrl &= ~ACM_CTRL_DTR; 1073 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1074 newctrl |= ACM_CTRL_DTR; 1075 } 1076 1077 if (newctrl != acm->ctrlout) 1078 acm_set_control(acm, acm->ctrlout = newctrl); 1079 1080 if (memcmp(&acm->line, &newline, sizeof newline)) { 1081 memcpy(&acm->line, &newline, sizeof newline); 1082 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1083 __func__, 1084 le32_to_cpu(newline.dwDTERate), 1085 newline.bCharFormat, newline.bParityType, 1086 newline.bDataBits); 1087 acm_set_line(acm, &acm->line); 1088 } 1089 } 1090 1091 static const struct tty_port_operations acm_port_ops = { 1092 .dtr_rts = acm_port_dtr_rts, 1093 .shutdown = acm_port_shutdown, 1094 .activate = acm_port_activate, 1095 .destruct = acm_port_destruct, 1096 }; 1097 1098 /* 1099 * USB probe and disconnect routines. 1100 */ 1101 1102 /* Little helpers: write/read buffers free */ 1103 static void acm_write_buffers_free(struct acm *acm) 1104 { 1105 int i; 1106 struct acm_wb *wb; 1107 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1108 1109 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1110 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); 1111 } 1112 1113 static void acm_read_buffers_free(struct acm *acm) 1114 { 1115 struct usb_device *usb_dev = interface_to_usbdev(acm->control); 1116 int i; 1117 1118 for (i = 0; i < acm->rx_buflimit; i++) 1119 usb_free_coherent(usb_dev, acm->readsize, 1120 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1121 } 1122 1123 /* Little helper: write buffers allocate */ 1124 static int acm_write_buffers_alloc(struct acm *acm) 1125 { 1126 int i; 1127 struct acm_wb *wb; 1128 1129 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1130 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1131 &wb->dmah); 1132 if (!wb->buf) { 1133 while (i != 0) { 1134 --i; 1135 --wb; 1136 usb_free_coherent(acm->dev, acm->writesize, 1137 wb->buf, wb->dmah); 1138 } 1139 return -ENOMEM; 1140 } 1141 } 1142 return 0; 1143 } 1144 1145 static int acm_probe(struct usb_interface *intf, 1146 const struct usb_device_id *id) 1147 { 1148 struct usb_cdc_union_desc *union_header = NULL; 1149 struct usb_cdc_country_functional_desc *cfd = NULL; 1150 unsigned char *buffer = intf->altsetting->extra; 1151 int buflen = intf->altsetting->extralen; 1152 struct usb_interface *control_interface; 1153 struct usb_interface *data_interface; 1154 struct usb_endpoint_descriptor *epctrl = NULL; 1155 struct usb_endpoint_descriptor *epread = NULL; 1156 struct usb_endpoint_descriptor *epwrite = NULL; 1157 struct usb_device *usb_dev = interface_to_usbdev(intf); 1158 struct acm *acm; 1159 int minor; 1160 int ctrlsize, readsize; 1161 u8 *buf; 1162 u8 ac_management_function = 0; 1163 u8 call_management_function = 0; 1164 int call_interface_num = -1; 1165 int data_interface_num = -1; 1166 unsigned long quirks; 1167 int num_rx_buf; 1168 int i; 1169 unsigned int elength = 0; 1170 int combined_interfaces = 0; 1171 struct device *tty_dev; 1172 int rv = -ENOMEM; 1173 1174 /* normal quirks */ 1175 quirks = (unsigned long)id->driver_info; 1176 1177 if (quirks == IGNORE_DEVICE) 1178 return -ENODEV; 1179 1180 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1181 1182 /* handle quirks deadly to normal probing*/ 1183 if (quirks == NO_UNION_NORMAL) { 1184 data_interface = usb_ifnum_to_if(usb_dev, 1); 1185 control_interface = usb_ifnum_to_if(usb_dev, 0); 1186 /* we would crash */ 1187 if (!data_interface || !control_interface) 1188 return -ENODEV; 1189 goto skip_normal_probe; 1190 } 1191 1192 /* normal probing*/ 1193 if (!buffer) { 1194 dev_err(&intf->dev, "Weird descriptor references\n"); 1195 return -EINVAL; 1196 } 1197 1198 if (!buflen) { 1199 if (intf->cur_altsetting->endpoint && 1200 intf->cur_altsetting->endpoint->extralen && 1201 intf->cur_altsetting->endpoint->extra) { 1202 dev_dbg(&intf->dev, 1203 "Seeking extra descriptors on endpoint\n"); 1204 buflen = intf->cur_altsetting->endpoint->extralen; 1205 buffer = intf->cur_altsetting->endpoint->extra; 1206 } else { 1207 dev_err(&intf->dev, 1208 "Zero length descriptor references\n"); 1209 return -EINVAL; 1210 } 1211 } 1212 1213 while (buflen > 0) { 1214 elength = buffer[0]; 1215 if (!elength) { 1216 dev_err(&intf->dev, "skipping garbage byte\n"); 1217 elength = 1; 1218 goto next_desc; 1219 } 1220 if (buffer[1] != USB_DT_CS_INTERFACE) { 1221 dev_err(&intf->dev, "skipping garbage\n"); 1222 goto next_desc; 1223 } 1224 1225 switch (buffer[2]) { 1226 case USB_CDC_UNION_TYPE: /* we've found it */ 1227 if (elength < sizeof(struct usb_cdc_union_desc)) 1228 goto next_desc; 1229 if (union_header) { 1230 dev_err(&intf->dev, "More than one " 1231 "union descriptor, skipping ...\n"); 1232 goto next_desc; 1233 } 1234 union_header = (struct usb_cdc_union_desc *)buffer; 1235 break; 1236 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ 1237 if (elength < sizeof(struct usb_cdc_country_functional_desc)) 1238 goto next_desc; 1239 cfd = (struct usb_cdc_country_functional_desc *)buffer; 1240 break; 1241 case USB_CDC_HEADER_TYPE: /* maybe check version */ 1242 break; /* for now we ignore it */ 1243 case USB_CDC_ACM_TYPE: 1244 if (elength < 4) 1245 goto next_desc; 1246 ac_management_function = buffer[3]; 1247 break; 1248 case USB_CDC_CALL_MANAGEMENT_TYPE: 1249 if (elength < 5) 1250 goto next_desc; 1251 call_management_function = buffer[3]; 1252 call_interface_num = buffer[4]; 1253 break; 1254 default: 1255 /* 1256 * there are LOTS more CDC descriptors that 1257 * could legitimately be found here. 1258 */ 1259 dev_dbg(&intf->dev, "Ignoring descriptor: " 1260 "type %02x, length %ud\n", 1261 buffer[2], elength); 1262 break; 1263 } 1264 next_desc: 1265 buflen -= elength; 1266 buffer += elength; 1267 } 1268 1269 if (!union_header) { 1270 if (call_interface_num > 0) { 1271 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1272 /* quirks for Droids MuIn LCD */ 1273 if (quirks & NO_DATA_INTERFACE) 1274 data_interface = usb_ifnum_to_if(usb_dev, 0); 1275 else 1276 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); 1277 control_interface = intf; 1278 } else { 1279 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1280 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1281 return -ENODEV; 1282 } else { 1283 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1284 combined_interfaces = 1; 1285 control_interface = data_interface = intf; 1286 goto look_for_collapsed_interface; 1287 } 1288 } 1289 } else { 1290 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1291 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); 1292 } 1293 1294 if (!control_interface || !data_interface) { 1295 dev_dbg(&intf->dev, "no interfaces\n"); 1296 return -ENODEV; 1297 } 1298 1299 if (data_interface_num != call_interface_num) 1300 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1301 1302 if (control_interface == data_interface) { 1303 /* some broken devices designed for windows work this way */ 1304 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1305 combined_interfaces = 1; 1306 /* a popular other OS doesn't use it */ 1307 quirks |= NO_CAP_LINE; 1308 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1309 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1310 return -EINVAL; 1311 } 1312 look_for_collapsed_interface: 1313 for (i = 0; i < 3; i++) { 1314 struct usb_endpoint_descriptor *ep; 1315 ep = &data_interface->cur_altsetting->endpoint[i].desc; 1316 1317 if (usb_endpoint_is_int_in(ep)) 1318 epctrl = ep; 1319 else if (usb_endpoint_is_bulk_out(ep)) 1320 epwrite = ep; 1321 else if (usb_endpoint_is_bulk_in(ep)) 1322 epread = ep; 1323 else 1324 return -EINVAL; 1325 } 1326 if (!epctrl || !epread || !epwrite) 1327 return -ENODEV; 1328 else 1329 goto made_compressed_probe; 1330 } 1331 1332 skip_normal_probe: 1333 1334 /*workaround for switched interfaces */ 1335 if (data_interface->cur_altsetting->desc.bInterfaceClass 1336 != CDC_DATA_INTERFACE_TYPE) { 1337 if (control_interface->cur_altsetting->desc.bInterfaceClass 1338 == CDC_DATA_INTERFACE_TYPE) { 1339 dev_dbg(&intf->dev, 1340 "Your device has switched interfaces.\n"); 1341 swap(control_interface, data_interface); 1342 } else { 1343 return -EINVAL; 1344 } 1345 } 1346 1347 /* Accept probe requests only for the control interface */ 1348 if (!combined_interfaces && intf != control_interface) 1349 return -ENODEV; 1350 1351 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1352 /* valid in this context */ 1353 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1354 return -EBUSY; 1355 } 1356 1357 1358 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1359 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1360 return -EINVAL; 1361 1362 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1363 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1364 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1365 1366 1367 /* workaround for switched endpoints */ 1368 if (!usb_endpoint_dir_in(epread)) { 1369 /* descriptors are swapped */ 1370 dev_dbg(&intf->dev, 1371 "The data interface has switched endpoints\n"); 1372 swap(epread, epwrite); 1373 } 1374 made_compressed_probe: 1375 dev_dbg(&intf->dev, "interfaces are valid\n"); 1376 1377 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1378 if (acm == NULL) 1379 goto alloc_fail; 1380 1381 minor = acm_alloc_minor(acm); 1382 if (minor < 0) { 1383 dev_err(&intf->dev, "no more free acm devices\n"); 1384 kfree(acm); 1385 return -ENODEV; 1386 } 1387 1388 ctrlsize = usb_endpoint_maxp(epctrl); 1389 readsize = usb_endpoint_maxp(epread) * 1390 (quirks == SINGLE_RX_URB ? 1 : 2); 1391 acm->combined_interfaces = combined_interfaces; 1392 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1393 acm->control = control_interface; 1394 acm->data = data_interface; 1395 acm->minor = minor; 1396 acm->dev = usb_dev; 1397 acm->ctrl_caps = ac_management_function; 1398 if (quirks & NO_CAP_LINE) 1399 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1400 acm->ctrlsize = ctrlsize; 1401 acm->readsize = readsize; 1402 acm->rx_buflimit = num_rx_buf; 1403 INIT_WORK(&acm->work, acm_softint); 1404 init_waitqueue_head(&acm->wioctl); 1405 spin_lock_init(&acm->write_lock); 1406 spin_lock_init(&acm->read_lock); 1407 mutex_init(&acm->mutex); 1408 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1409 acm->is_int_ep = usb_endpoint_xfer_int(epread); 1410 if (acm->is_int_ep) 1411 acm->bInterval = epread->bInterval; 1412 tty_port_init(&acm->port); 1413 acm->port.ops = &acm_port_ops; 1414 init_usb_anchor(&acm->delayed); 1415 acm->quirks = quirks; 1416 1417 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1418 if (!buf) 1419 goto alloc_fail2; 1420 acm->ctrl_buffer = buf; 1421 1422 if (acm_write_buffers_alloc(acm) < 0) 1423 goto alloc_fail4; 1424 1425 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1426 if (!acm->ctrlurb) 1427 goto alloc_fail5; 1428 1429 for (i = 0; i < num_rx_buf; i++) { 1430 struct acm_rb *rb = &(acm->read_buffers[i]); 1431 struct urb *urb; 1432 1433 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1434 &rb->dma); 1435 if (!rb->base) 1436 goto alloc_fail6; 1437 rb->index = i; 1438 rb->instance = acm; 1439 1440 urb = usb_alloc_urb(0, GFP_KERNEL); 1441 if (!urb) 1442 goto alloc_fail6; 1443 1444 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1445 urb->transfer_dma = rb->dma; 1446 if (acm->is_int_ep) { 1447 usb_fill_int_urb(urb, acm->dev, 1448 acm->rx_endpoint, 1449 rb->base, 1450 acm->readsize, 1451 acm_read_bulk_callback, rb, 1452 acm->bInterval); 1453 } else { 1454 usb_fill_bulk_urb(urb, acm->dev, 1455 acm->rx_endpoint, 1456 rb->base, 1457 acm->readsize, 1458 acm_read_bulk_callback, rb); 1459 } 1460 1461 acm->read_urbs[i] = urb; 1462 __set_bit(i, &acm->read_urbs_free); 1463 } 1464 for (i = 0; i < ACM_NW; i++) { 1465 struct acm_wb *snd = &(acm->wb[i]); 1466 1467 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1468 if (snd->urb == NULL) 1469 goto alloc_fail7; 1470 1471 if (usb_endpoint_xfer_int(epwrite)) 1472 usb_fill_int_urb(snd->urb, usb_dev, 1473 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress), 1474 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1475 else 1476 usb_fill_bulk_urb(snd->urb, usb_dev, 1477 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), 1478 NULL, acm->writesize, acm_write_bulk, snd); 1479 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1480 if (quirks & SEND_ZERO_PACKET) 1481 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1482 snd->instance = acm; 1483 } 1484 1485 usb_set_intfdata(intf, acm); 1486 1487 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1488 if (i < 0) 1489 goto alloc_fail7; 1490 1491 if (cfd) { /* export the country data */ 1492 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1493 if (!acm->country_codes) 1494 goto skip_countries; 1495 acm->country_code_size = cfd->bLength - 4; 1496 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1497 cfd->bLength - 4); 1498 acm->country_rel_date = cfd->iCountryCodeRelDate; 1499 1500 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1501 if (i < 0) { 1502 kfree(acm->country_codes); 1503 acm->country_codes = NULL; 1504 acm->country_code_size = 0; 1505 goto skip_countries; 1506 } 1507 1508 i = device_create_file(&intf->dev, 1509 &dev_attr_iCountryCodeRelDate); 1510 if (i < 0) { 1511 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1512 kfree(acm->country_codes); 1513 acm->country_codes = NULL; 1514 acm->country_code_size = 0; 1515 goto skip_countries; 1516 } 1517 } 1518 1519 skip_countries: 1520 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1521 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1522 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1523 /* works around buggy devices */ 1524 epctrl->bInterval ? epctrl->bInterval : 16); 1525 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1526 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1527 1528 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1529 1530 acm->line.dwDTERate = cpu_to_le32(9600); 1531 acm->line.bDataBits = 8; 1532 acm_set_line(acm, &acm->line); 1533 1534 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1535 usb_set_intfdata(data_interface, acm); 1536 1537 usb_get_intf(control_interface); 1538 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1539 &control_interface->dev); 1540 if (IS_ERR(tty_dev)) { 1541 rv = PTR_ERR(tty_dev); 1542 goto alloc_fail8; 1543 } 1544 1545 if (quirks & CLEAR_HALT_CONDITIONS) { 1546 usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress)); 1547 usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress)); 1548 } 1549 1550 return 0; 1551 alloc_fail8: 1552 if (acm->country_codes) { 1553 device_remove_file(&acm->control->dev, 1554 &dev_attr_wCountryCodes); 1555 device_remove_file(&acm->control->dev, 1556 &dev_attr_iCountryCodeRelDate); 1557 kfree(acm->country_codes); 1558 } 1559 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1560 alloc_fail7: 1561 usb_set_intfdata(intf, NULL); 1562 for (i = 0; i < ACM_NW; i++) 1563 usb_free_urb(acm->wb[i].urb); 1564 alloc_fail6: 1565 for (i = 0; i < num_rx_buf; i++) 1566 usb_free_urb(acm->read_urbs[i]); 1567 acm_read_buffers_free(acm); 1568 usb_free_urb(acm->ctrlurb); 1569 alloc_fail5: 1570 acm_write_buffers_free(acm); 1571 alloc_fail4: 1572 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1573 alloc_fail2: 1574 acm_release_minor(acm); 1575 kfree(acm); 1576 alloc_fail: 1577 return rv; 1578 } 1579 1580 static void stop_data_traffic(struct acm *acm) 1581 { 1582 int i; 1583 1584 dev_dbg(&acm->control->dev, "%s\n", __func__); 1585 1586 usb_kill_urb(acm->ctrlurb); 1587 for (i = 0; i < ACM_NW; i++) 1588 usb_kill_urb(acm->wb[i].urb); 1589 for (i = 0; i < acm->rx_buflimit; i++) 1590 usb_kill_urb(acm->read_urbs[i]); 1591 1592 cancel_work_sync(&acm->work); 1593 } 1594 1595 static void acm_disconnect(struct usb_interface *intf) 1596 { 1597 struct acm *acm = usb_get_intfdata(intf); 1598 struct usb_device *usb_dev = interface_to_usbdev(intf); 1599 struct tty_struct *tty; 1600 int i; 1601 1602 dev_dbg(&intf->dev, "%s\n", __func__); 1603 1604 /* sibling interface is already cleaning up */ 1605 if (!acm) 1606 return; 1607 1608 mutex_lock(&acm->mutex); 1609 acm->disconnected = true; 1610 if (acm->country_codes) { 1611 device_remove_file(&acm->control->dev, 1612 &dev_attr_wCountryCodes); 1613 device_remove_file(&acm->control->dev, 1614 &dev_attr_iCountryCodeRelDate); 1615 } 1616 wake_up_all(&acm->wioctl); 1617 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1618 usb_set_intfdata(acm->control, NULL); 1619 usb_set_intfdata(acm->data, NULL); 1620 mutex_unlock(&acm->mutex); 1621 1622 tty = tty_port_tty_get(&acm->port); 1623 if (tty) { 1624 tty_vhangup(tty); 1625 tty_kref_put(tty); 1626 } 1627 1628 stop_data_traffic(acm); 1629 1630 tty_unregister_device(acm_tty_driver, acm->minor); 1631 1632 usb_free_urb(acm->ctrlurb); 1633 for (i = 0; i < ACM_NW; i++) 1634 usb_free_urb(acm->wb[i].urb); 1635 for (i = 0; i < acm->rx_buflimit; i++) 1636 usb_free_urb(acm->read_urbs[i]); 1637 acm_write_buffers_free(acm); 1638 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1639 acm_read_buffers_free(acm); 1640 1641 if (!acm->combined_interfaces) 1642 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1643 acm->data : acm->control); 1644 1645 tty_port_put(&acm->port); 1646 } 1647 1648 #ifdef CONFIG_PM 1649 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1650 { 1651 struct acm *acm = usb_get_intfdata(intf); 1652 int cnt; 1653 1654 spin_lock_irq(&acm->write_lock); 1655 if (PMSG_IS_AUTO(message)) { 1656 if (acm->transmitting) { 1657 spin_unlock_irq(&acm->write_lock); 1658 return -EBUSY; 1659 } 1660 } 1661 cnt = acm->susp_count++; 1662 spin_unlock_irq(&acm->write_lock); 1663 1664 if (cnt) 1665 return 0; 1666 1667 stop_data_traffic(acm); 1668 1669 return 0; 1670 } 1671 1672 static int acm_resume(struct usb_interface *intf) 1673 { 1674 struct acm *acm = usb_get_intfdata(intf); 1675 struct urb *urb; 1676 int rv = 0; 1677 1678 spin_lock_irq(&acm->write_lock); 1679 1680 if (--acm->susp_count) 1681 goto out; 1682 1683 if (tty_port_initialized(&acm->port)) { 1684 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1685 1686 for (;;) { 1687 urb = usb_get_from_anchor(&acm->delayed); 1688 if (!urb) 1689 break; 1690 1691 acm_start_wb(acm, urb->context); 1692 } 1693 1694 /* 1695 * delayed error checking because we must 1696 * do the write path at all cost 1697 */ 1698 if (rv < 0) 1699 goto out; 1700 1701 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1702 } 1703 out: 1704 spin_unlock_irq(&acm->write_lock); 1705 1706 return rv; 1707 } 1708 1709 static int acm_reset_resume(struct usb_interface *intf) 1710 { 1711 struct acm *acm = usb_get_intfdata(intf); 1712 1713 if (tty_port_initialized(&acm->port)) 1714 tty_port_tty_hangup(&acm->port, false); 1715 1716 return acm_resume(intf); 1717 } 1718 1719 #endif /* CONFIG_PM */ 1720 1721 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1722 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1723 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1724 USB_CDC_ACM_PROTO_VENDOR) 1725 1726 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1727 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1728 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1729 USB_CDC_ACM_PROTO_VENDOR) 1730 1731 /* 1732 * USB driver structure. 1733 */ 1734 1735 static const struct usb_device_id acm_ids[] = { 1736 /* quirky and broken devices */ 1737 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1738 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1739 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1740 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1741 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1742 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1743 }, 1744 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1745 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1746 }, 1747 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1748 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1749 }, 1750 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1751 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1752 }, 1753 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1754 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1755 }, 1756 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1757 .driver_info = SINGLE_RX_URB, 1758 }, 1759 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1760 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1761 }, 1762 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1763 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1764 }, 1765 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1766 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1767 }, 1768 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1769 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1770 }, 1771 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1772 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1773 }, 1774 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1775 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1776 }, 1777 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1778 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1779 }, 1780 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1781 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1782 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1783 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1784 }, 1785 /* Motorola H24 HSPA module: */ 1786 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1787 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1788 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1789 }, 1790 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1791 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1792 }, 1793 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1794 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1795 }, 1796 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1797 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1798 }, 1799 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1800 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1801 }, 1802 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1803 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1804 }, 1805 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1806 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1807 }, 1808 1809 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1810 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1811 data interface instead of 1812 communications interface. 1813 Maybe we should define a new 1814 quirk for this. */ 1815 }, 1816 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1817 .driver_info = NO_UNION_NORMAL, 1818 }, 1819 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1820 .driver_info = NO_UNION_NORMAL, 1821 }, 1822 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1823 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1824 }, 1825 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1826 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1827 }, 1828 1829 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1830 .driver_info = CLEAR_HALT_CONDITIONS, 1831 }, 1832 1833 /* Nokia S60 phones expose two ACM channels. The first is 1834 * a modem and is picked up by the standard AT-command 1835 * information below. The second is 'vendor-specific' but 1836 * is treated as a serial device at the S60 end, so we want 1837 * to expose it on Linux too. */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1846 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1847 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1848 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1849 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1850 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1851 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1852 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1853 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1854 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1855 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1856 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1857 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1858 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1859 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1860 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1861 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1862 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1863 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1864 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1865 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1866 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1867 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1868 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1869 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1870 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1871 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1872 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1873 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1874 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1875 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1876 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1877 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1878 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1879 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1880 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1881 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1882 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1883 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1884 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1885 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1886 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1887 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1888 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1889 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1890 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1891 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1892 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1893 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1894 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1895 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1896 1897 /* Support for Owen devices */ 1898 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1899 1900 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1901 1902 /* Support for Droids MuIn LCD */ 1903 { USB_DEVICE(0x04d8, 0x000b), 1904 .driver_info = NO_DATA_INTERFACE, 1905 }, 1906 1907 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1908 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1909 .driver_info = IGNORE_DEVICE, 1910 }, 1911 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1912 .driver_info = IGNORE_DEVICE, 1913 }, 1914 #endif 1915 1916 /*Samsung phone in firmware update mode */ 1917 { USB_DEVICE(0x04e8, 0x685d), 1918 .driver_info = IGNORE_DEVICE, 1919 }, 1920 1921 /* Exclude Infineon Flash Loader utility */ 1922 { USB_DEVICE(0x058b, 0x0041), 1923 .driver_info = IGNORE_DEVICE, 1924 }, 1925 1926 /* control interfaces without any protocol set */ 1927 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1928 USB_CDC_PROTO_NONE) }, 1929 1930 /* control interfaces with various AT-command sets */ 1931 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1932 USB_CDC_ACM_PROTO_AT_V25TER) }, 1933 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1934 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1935 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1936 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1937 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1938 USB_CDC_ACM_PROTO_AT_GSM) }, 1939 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1940 USB_CDC_ACM_PROTO_AT_3G) }, 1941 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1942 USB_CDC_ACM_PROTO_AT_CDMA) }, 1943 1944 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1945 .driver_info = SEND_ZERO_PACKET, 1946 }, 1947 1948 { } 1949 }; 1950 1951 MODULE_DEVICE_TABLE(usb, acm_ids); 1952 1953 static struct usb_driver acm_driver = { 1954 .name = "cdc_acm", 1955 .probe = acm_probe, 1956 .disconnect = acm_disconnect, 1957 #ifdef CONFIG_PM 1958 .suspend = acm_suspend, 1959 .resume = acm_resume, 1960 .reset_resume = acm_reset_resume, 1961 #endif 1962 .id_table = acm_ids, 1963 #ifdef CONFIG_PM 1964 .supports_autosuspend = 1, 1965 #endif 1966 .disable_hub_initiated_lpm = 1, 1967 }; 1968 1969 /* 1970 * TTY driver structures. 1971 */ 1972 1973 static const struct tty_operations acm_ops = { 1974 .install = acm_tty_install, 1975 .open = acm_tty_open, 1976 .close = acm_tty_close, 1977 .cleanup = acm_tty_cleanup, 1978 .hangup = acm_tty_hangup, 1979 .write = acm_tty_write, 1980 .put_char = acm_tty_put_char, 1981 .flush_chars = acm_tty_flush_chars, 1982 .write_room = acm_tty_write_room, 1983 .ioctl = acm_tty_ioctl, 1984 .throttle = acm_tty_throttle, 1985 .unthrottle = acm_tty_unthrottle, 1986 .chars_in_buffer = acm_tty_chars_in_buffer, 1987 .break_ctl = acm_tty_break_ctl, 1988 .set_termios = acm_tty_set_termios, 1989 .tiocmget = acm_tty_tiocmget, 1990 .tiocmset = acm_tty_tiocmset, 1991 }; 1992 1993 /* 1994 * Init / exit. 1995 */ 1996 1997 static int __init acm_init(void) 1998 { 1999 int retval; 2000 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 2001 if (!acm_tty_driver) 2002 return -ENOMEM; 2003 acm_tty_driver->driver_name = "acm", 2004 acm_tty_driver->name = "ttyACM", 2005 acm_tty_driver->major = ACM_TTY_MAJOR, 2006 acm_tty_driver->minor_start = 0, 2007 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 2008 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 2009 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2010 acm_tty_driver->init_termios = tty_std_termios; 2011 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 2012 HUPCL | CLOCAL; 2013 tty_set_operations(acm_tty_driver, &acm_ops); 2014 2015 retval = tty_register_driver(acm_tty_driver); 2016 if (retval) { 2017 put_tty_driver(acm_tty_driver); 2018 return retval; 2019 } 2020 2021 retval = usb_register(&acm_driver); 2022 if (retval) { 2023 tty_unregister_driver(acm_tty_driver); 2024 put_tty_driver(acm_tty_driver); 2025 return retval; 2026 } 2027 2028 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 2029 2030 return 0; 2031 } 2032 2033 static void __exit acm_exit(void) 2034 { 2035 usb_deregister(&acm_driver); 2036 tty_unregister_driver(acm_tty_driver); 2037 put_tty_driver(acm_tty_driver); 2038 idr_destroy(&acm_minors); 2039 } 2040 2041 module_init(acm_init); 2042 module_exit(acm_exit); 2043 2044 MODULE_AUTHOR(DRIVER_AUTHOR); 2045 MODULE_DESCRIPTION(DRIVER_DESC); 2046 MODULE_LICENSE("GPL"); 2047 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2048